wayne: Import GPS

 * QC Tag: LA.UM.6.2.r1-06100-sdm660.0

Change-Id: I26da3b90caa473ed5f88408627463ec7f7655f23
Signed-off-by: Isaac Chen <isaacchen@isaacchen.cn>

68 files changed, 11092 insertions, 0 deletions

diff --git a/gps/utils/Android.mk b/gps/utils/Android.mk
new file mode 100644
index 0000000..3f3b83a
--- /dev/null
+++ b/gps/utils/Android.mk
@@ -0,0 +1,65 @@
+ifneq ($(BOARD_VENDOR_QCOM_GPS_LOC_API_HARDWARE),)
+ifneq ($(BUILD_TINY_ANDROID),true)
+#Compile this library only for builds with the latest modem image
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+
+## Libs
+LOCAL_SHARED_LIBRARIES := \
+    libutils \
+    libcutils \
+    liblog \
+    libloc_pla
+
+LOCAL_SRC_FILES += \
+    loc_log.cpp \
+    loc_cfg.cpp \
+    msg_q.c \
+    linked_list.c \
+    loc_target.cpp \
+    platform_lib_abstractions/elapsed_millis_since_boot.cpp \
+    LocHeap.cpp \
+    LocTimer.cpp \
+    LocThread.cpp \
+    MsgTask.cpp \
+    loc_misc_utils.cpp \
+    loc_nmea.cpp
+
+# Flag -std=c++11 is not accepted by compiler when LOCAL_CLANG is set to true
+LOCAL_CFLAGS += \
+     -fno-short-enums \
+     -D_ANDROID_
+
+ifeq ($(TARGET_BUILD_VARIANT),user)
+   LOCAL_CFLAGS += -DTARGET_BUILD_VARIANT_USER
+endif
+
+LOCAL_LDFLAGS += -Wl,--export-dynamic
+
+## Includes
+LOCAL_HEADER_LIBRARIES := \
+    libloc_pla_headers \
+    liblocation_api_headers
+
+LOCAL_MODULE := libgps.utils
+LOCAL_MODULE_PATH_32 := $(TARGET_OUT_VENDOR)/lib
+LOCAL_MODULE_PATH_64 := $(TARGET_OUT_VENDOR)/lib64
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_PRELINK_MODULE := false
+
+LOCAL_CFLAGS += $(GNSS_CFLAGS)
+
+include $(BUILD_SHARED_LIBRARY)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libgps.utils_headers
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)
+include $(BUILD_HEADER_LIBRARY)
+
+include $(addsuffix /Android.mk, $(addprefix $(LOCAL_PATH)/, platform_lib_abstractions))
+endif # not BUILD_TINY_ANDROID
+endif # BOARD_VENDOR_QCOM_GPS_LOC_API_HARDWARE
diff --git a/gps/utils/LocHeap.cpp b/gps/utils/LocHeap.cpp
new file mode 100644
index 0000000..d667f14
--- /dev/null
+++ b/gps/utils/LocHeap.cpp
@@ -0,0 +1,354 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <LocHeap.h>
+
+class LocHeapNode {
+    friend class LocHeap;
+
+    // size of of the subtree, excluding self, 1 if no subtree
+    int mSize;
+    LocHeapNode* mLeft;
+    LocHeapNode* mRight;
+    LocRankable* mData;
+public:
+    inline LocHeapNode(LocRankable& data) :
+        mSize(1), mLeft(NULL), mRight(NULL), mData(&data) {}
+    ~LocHeapNode();
+
+    // this only swaps the data of the two nodes, so no
+    // detach / re-attached is necessary
+    void swap(LocHeapNode& node);
+
+    LocRankable* detachData();
+
+    // push a node into the tree stucture, keeping sorted by rank
+    void push(LocHeapNode& node);
+
+    // pop the head node out of the tree stucture. keeping sorted by rank
+    static LocHeapNode* pop(LocHeapNode*& top);
+
+    // remove a specific node from the tree
+    // returns the pointer to the node removed, which would be either the
+    //         same as input (if successfully removed); or NULL (if failed).
+    static LocHeapNode* remove(LocHeapNode*& top, LocRankable& data);
+
+    // convenience method to compare data ranking
+    inline bool outRanks(LocHeapNode& node) { return mData->outRanks(*node.mData); }
+    inline bool outRanks(LocRankable& data) { return mData->outRanks(data); }
+
+    // checks if mSize is correct, AND this node is the highest ranking
+    // of the entire subtree
+    bool checkNodes();
+
+    inline int getSize() { return mSize; }
+};
+
+inline
+LocHeapNode::~LocHeapNode() {
+    if (mLeft) {
+        delete mLeft;
+        mLeft = NULL;
+    }
+    if (mRight) {
+        delete mRight;
+        mRight = NULL;
+    }
+    if (mData) {
+        mData = NULL;
+    }
+}
+
+inline
+void LocHeapNode::swap(LocHeapNode& node) {
+    LocRankable* tmpData = node.mData;
+    node.mData = mData;
+    mData = tmpData;
+}
+
+inline
+LocRankable* LocHeapNode::detachData()  {
+    LocRankable* data = mData;
+    mData = NULL;
+    return data;
+}
+
+// push keeps the tree sorted by rank, it also tries to balance the
+// tree by adding the new node to the smaller of the subtrees.
+// The pointer to the tree and internal links never change. If the
+// mData of tree top ranks lower than that of the incoming node,
+// mData will be swapped with that of the incoming node to ensure
+// ranking, no restructuring the container nodes.
+void LocHeapNode::push(LocHeapNode& node) {
+    // ensure the current node ranks higher than in the incoming one
+    if (node.outRanks(*this)) {
+        swap(node);
+    }
+
+    // now drop the new node (ensured lower than *this) into a subtree
+    if (NULL == mLeft) {
+        mLeft = &node;
+    } else if (NULL == mRight) {
+        mRight = &node;
+    } else if (mLeft->mSize <= mRight->mSize) {
+        mLeft->push(node);
+    } else {
+        mRight->push(node);
+    }
+    mSize++;
+}
+
+// pop keeps the tree sorted by rank, but it does not try to balance
+// the tree. It recursively swaps with the higher ranked top of the
+// subtrees.
+// The return is a popped out node from leaf level, that has the data
+// swapped all the way down from the top. The pinter to the tree and
+// internal links will not be changed or restructured, except for the
+// node that is popped out.
+// If the return pointer == this, this the last node in the tree.
+LocHeapNode* LocHeapNode::pop(LocHeapNode*& top) {
+    // we know the top has the highest ranking at this point, else
+    // the tree is broken. This top will be popped out.  But we need
+    // a node from the left or right child, whichever ranks higher,
+    // to replace the current top. This then will need to be done
+    // recursively to the leaf level. So we swap the mData of the
+    // current top node all the way down to the leaf level.
+    LocHeapNode* poppedNode = top;
+    // top is losing a node in its subtree
+    top->mSize--;
+    if (top->mLeft || top->mRight) {
+        // if mLeft is NULL, mRight for sure is NOT NULL, take that;
+        // else if mRight is NULL, mLeft for sure is NOT, take that;
+        // else we take the address of whatever has higher ranking mData
+        LocHeapNode*& subTop = (NULL == top->mLeft) ? top->mRight :
+            ((NULL == top->mRight) ? top->mLeft :
+             (top->mLeft->outRanks(*(top->mRight)) ? top->mLeft : top->mRight));
+        // swap mData, the tree top gets updated with the new data.
+        top->swap(*subTop);
+        // pop out from the subtree
+        poppedNode = pop(subTop);
+    } else {
+        // if the top has only single node
+        // detach the poppedNode from the tree
+        // subTop is the reference of ether mLeft or mRight
+        // NOT a local stack pointer. so it MUST be NULL'ed here.
+        top = NULL;
+    }
+
+    return poppedNode;
+}
+
+// navigating through the tree and find the node that hass the input
+// data. Since this is a heap, we do recursive linear search.
+// returns the pointer to the node removed, which would be either the
+//         same as input (if successfully removed); or NULL (if failed).
+LocHeapNode* LocHeapNode::remove(LocHeapNode*& top, LocRankable& data) {
+    LocHeapNode* removedNode = NULL;
+    // this is the node, by address
+    if (&data == (LocRankable*)(top->mData)) {
+        // pop this node out
+        removedNode = pop(top);
+    } else if (!data.outRanks(*top->mData)) {
+        // subtrees might have this node
+        if (top->mLeft) {
+            removedNode = remove(top->mLeft, data);
+        }
+        // if we did not find in mLeft, and mRight is not empty
+        if (!removedNode && top->mRight) {
+            removedNode = remove(top->mRight, data);
+        }
+
+        // top lost a node in its subtree
+        if (removedNode) {
+            top->mSize--;
+        }
+    }
+
+    return removedNode;
+}
+
+// checks if mSize is correct, AND this node is the highest ranking
+// of the entire subtree
+bool LocHeapNode::checkNodes() {
+    // size of the current subtree
+    int totalSize = mSize;
+    if (mLeft) {
+        // check the consistency of left subtree
+        if (mLeft->outRanks(*this) || !mLeft->checkNodes()) {
+            return false;
+        }
+        // subtract the size of left subtree (with subtree head)
+        totalSize -= mLeft->mSize;
+    }
+
+    if (mRight) {
+        // check the consistency of right subtree
+        if (mRight->outRanks(*this) || !mRight->checkNodes()) {
+            return false;
+        }
+        // subtract the size of right subtree (with subtree head)
+        totalSize -= mRight->mSize;
+    }
+
+    // for the tree nodes to consistent, totalSize must be 1 now
+    return totalSize == 1;
+}
+
+LocHeap::~LocHeap() {
+    if (mTree) {
+        delete mTree;
+    }
+}
+
+void LocHeap::push(LocRankable& node) {
+    LocHeapNode* heapNode = new LocHeapNode(node);
+    if (!mTree) {
+        mTree = heapNode;
+    } else {
+        mTree->push(*heapNode);
+    }
+}
+
+LocRankable* LocHeap::peek() {
+    LocRankable* top = NULL;
+    if (mTree) {
+        top = mTree->mData;
+    }
+    return top;
+}
+
+LocRankable* LocHeap::pop() {
+    LocRankable* locNode = NULL;
+    if (mTree) {
+        // mTree may become NULL after this call
+        LocHeapNode* heapNode = LocHeapNode::pop(mTree);
+        locNode = heapNode->detachData();
+        delete heapNode;
+    }
+    return locNode;
+}
+
+LocRankable* LocHeap::remove(LocRankable& rankable) {
+    LocRankable* locNode = NULL;
+    if (mTree) {
+        // mTree may become NULL after this call
+        LocHeapNode* heapNode = LocHeapNode::remove(mTree, rankable);
+        if (heapNode) {
+            locNode = heapNode->detachData();
+            delete heapNode;
+        }
+    }
+    return locNode;
+}
+
+#ifdef __LOC_UNIT_TEST__
+bool LocHeap::checkTree() {
+    return ((NULL == mTree) || mTree->checkNodes());
+}
+uint32_t LocHeap::getTreeSize() {
+    return (NULL == mTree) ? 0 : mTree->getSize();
+}
+#endif
+
+#ifdef __LOC_DEBUG__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+class LocHeapDebug : public LocHeap {
+public:
+    bool checkTree() {
+        return ((NULL == mTree) || mTree->checkNodes());
+    }
+
+    uint32_t getTreeSize() {
+        return (NULL == mTree) ? 0 : (mTree->getSize());
+    }
+};
+
+class LocHeapDebugData : public LocRankable {
+    const int mID;
+public:
+    LocHeapDebugData(int id) : mID(id) {}
+    inline virtual int ranks(LocRankable& rankable) {
+        LocHeapDebugData* testData = dynamic_cast<LocHeapDebugData*>(&rankable);
+        return testData->mID - mID;
+    }
+};
+
+// For Linux command line testing:
+// compilation: g++ -D__LOC_HOST_DEBUG__ -D__LOC_DEBUG__ -g -I. -I../../../../vendor/qcom/proprietary/gps-internal/unit-tests/fakes_for_host -I../../../../system/core/include LocHeap.cpp
+// test: valgrind --leak-check=full ./a.out 100
+int main(int argc, char** argv) {
+    srand(time(NULL));
+    int tries = atoi(argv[1]);
+    int checks = tries >> 3;
+    LocHeapDebug heap;
+    int treeSize = 0;
+
+    for (int i = 0; i < tries; i++) {
+        if (i % checks == 0 && !heap.checkTree()) {
+            printf("tree check failed before %dth op\n", i);
+        }
+        int r = rand();
+
+        if (r & 1) {
+            LocHeapDebugData* data = new LocHeapDebugData(r >> 1);
+            heap.push(dynamic_cast<LocRankable&>(*data));
+            treeSize++;
+        } else {
+            LocRankable* rankable = heap.pop();
+            if (rankable) {
+                delete rankable;
+            }
+            treeSize ? treeSize-- : 0;
+        }
+
+        printf("%s: %d == %d\n", (r&1)?"push":"pop", treeSize, heap.getTreeSize());
+        if (treeSize != heap.getTreeSize()) {
+            printf("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n");
+            tries = i+1;
+            break;
+        }
+    }
+
+    if (!heap.checkTree()) {
+        printf("!!!!!!!!!!tree check failed at the end after %d ops!!!!!!!\n", tries);
+    } else {
+        printf("success!\n");
+    }
+
+    for (LocRankable* data = heap.pop(); NULL != data; data = heap.pop()) {
+        delete data;
+    }
+
+    return 0;
+}
+
+#endif
diff --git a/gps/utils/LocHeap.h b/gps/utils/LocHeap.h
new file mode 100644
index 0000000..b491948
--- /dev/null
+++ b/gps/utils/LocHeap.h
@@ -0,0 +1,96 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ifndef __LOC_HEAP__
+#define __LOC_HEAP__
+
+#include <stddef.h>
+#include <string.h>
+
+// abstract class to be implemented by client to provide a rankable class
+class LocRankable {
+public:
+    virtual inline ~LocRankable() {}
+
+    // method to rank objects of such type for sorting purposes.
+    // The pointer of the input node would be stored in the heap.
+    // >0 if ranks higher than the input;
+    // ==0 if equally ranks with the input;
+    // <0 if ranks lower than the input
+    virtual int ranks(LocRankable& rankable) = 0;
+
+    // convenient method to rank objects of such type for sorting purposes.
+    inline bool outRanks(LocRankable& rankable) { return ranks(rankable) > 0; }
+};
+
+// opaque class to provide service implementation.
+class LocHeapNode;
+
+// a heap whose left and right children are not sorted. It is sorted only vertically,
+// i.e. parent always ranks higher than children, if they exist. Ranking algorithm is
+// implemented in Rankable. The reason that there is no sort between children is to
+// help beter balance the tree with lower cost. When a node is pushed to the tree,
+// it is guaranteed that the subtree that is smaller gets to have the new node.
+class LocHeap {
+protected:
+    LocHeapNode* mTree;
+public:
+    inline LocHeap() : mTree(NULL) {}
+    ~LocHeap();
+
+    // push keeps the tree sorted by rank, it also tries to balance the
+    // tree by adding the new node to the smaller of the subtrees.
+    // node is reference to an obj that is managed by client, that client
+    //      creates and destroyes. The destroy should happen after the
+    //      node is popped out from the heap.
+    void push(LocRankable& node);
+
+    // Peeks the node data on tree top, which has currently the highest ranking
+    // There is no change the tree structure with this operation
+    // Returns NULL if the tree is empty, otherwise pointer to the node data of
+    //         the tree top.
+    LocRankable* peek();
+
+    // pop keeps the tree sorted by rank, but it does not try to balance
+    // the tree.
+    // Return - pointer to the node popped out, or NULL if heap is already empty
+    LocRankable* pop();
+
+    // navigating through the tree and find the node that ranks the same
+    // as the input data, then remove it from the tree. Rank is implemented
+    // by rankable obj.
+    // returns the pointer to the node removed; or NULL (if failed).
+    LocRankable* remove(LocRankable& rankable);
+
+#ifdef __LOC_UNIT_TEST__
+    bool checkTree();
+    uint32_t getTreeSize();
+#endif
+};
+
+#endif //__LOC_HEAP__
diff --git a/gps/utils/LocSharedLock.h b/gps/utils/LocSharedLock.h
new file mode 100644
index 0000000..7fe6237
--- /dev/null
+++ b/gps/utils/LocSharedLock.h
@@ -0,0 +1,59 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ifndef __LOC_SHARED_LOCK__
+#define __LOC_SHARED_LOCK__
+
+#include <stddef.h>
+#include <cutils/atomic.h>
+#include <pthread.h>
+
+// This is a utility created for use cases such that there are more than
+// one client who need to share the same lock, but it is not predictable
+// which of these clients is to last to go away. This shared lock deletes
+// itself when the last client calls its drop() method. To add a cient,
+// this share lock's share() method has to be called, so that the obj
+// can maintain an accurate client count.
+class LocSharedLock {
+    volatile int32_t mRef;
+    pthread_mutex_t mMutex;
+    inline ~LocSharedLock() { pthread_mutex_destroy(&mMutex); }
+public:
+    // first client to create this LockSharedLock
+    inline LocSharedLock() : mRef(1) { pthread_mutex_init(&mMutex, NULL); }
+    // following client(s) are to *share()* this lock created by the first client
+    inline LocSharedLock* share() { android_atomic_inc(&mRef); return this; }
+    // whe a client no longer needs this shared lock, drop() shall be called.
+    inline void drop() { if (1 == android_atomic_dec(&mRef)) delete this; }
+    // locking the lock to enter critical section
+    inline void lock() { pthread_mutex_lock(&mMutex); }
+    // unlocking the lock to leave the critical section
+    inline void unlock() { pthread_mutex_unlock(&mMutex); }
+};
+
+#endif //__LOC_SHARED_LOCK__
diff --git a/gps/utils/LocThread.cpp b/gps/utils/LocThread.cpp
new file mode 100644
index 0000000..d112f61
--- /dev/null
+++ b/gps/utils/LocThread.cpp
@@ -0,0 +1,266 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <LocThread.h>
+#include <string.h>
+#include <pthread.h>
+#include <platform_lib_macros.h>
+
+class LocThreadDelegate {
+    LocRunnable* mRunnable;
+    bool mJoinable;
+    pthread_t mThandle;
+    pthread_mutex_t mMutex;
+    int mRefCount;
+    ~LocThreadDelegate();
+    LocThreadDelegate(LocThread::tCreate creator, const char* threadName,
+                      LocRunnable* runnable, bool joinable);
+    void destroy();
+public:
+    static LocThreadDelegate* create(LocThread::tCreate creator,
+            const char* threadName, LocRunnable* runnable, bool joinable);
+    void stop();
+    // bye() is for the parent thread to go away. if joinable,
+    // parent must stop the spawned thread, join, and then
+    // destroy(); if detached, the parent can go straight
+    // ahead to destroy()
+    inline void bye() { mJoinable ? stop() : destroy(); }
+    inline bool isRunning() { return (NULL != mRunnable); }
+    static void* threadMain(void* arg);
+};
+
+// it is important to note that internal members must be
+// initialized to values as if pthread_create succeeds.
+// This is to avoid the race condition between the threads,
+// once the thread is created, some of these values will
+// be check in the spawned thread, and must set correctly
+// then and there.
+// However, upon pthread_create failure, the data members
+// must be set to  indicate failure, e.g. mRunnable, and
+// threashold approprietly for destroy(), e.g. mRefCount.
+LocThreadDelegate::LocThreadDelegate(LocThread::tCreate creator,
+        const char* threadName, LocRunnable* runnable, bool joinable) :
+    mRunnable(runnable), mJoinable(joinable), mThandle((pthread_t)NULL),
+    mMutex(PTHREAD_MUTEX_INITIALIZER), mRefCount(2) {
+
+    // set up thread name, if nothing is passed in
+    if (!threadName) {
+        threadName = "LocThread";
+    }
+
+    // create the thread here, then if successful
+    // and a name is given, we set the thread name
+    if (creator) {
+        mThandle = creator(threadName, threadMain, this);
+    } else if (pthread_create(&mThandle, NULL, threadMain, this)) {
+        // pthread_create() failed
+        mThandle = (pthread_t)NULL;
+    }
+
+    if (mThandle) {
+        // set thread name
+        char lname[16];
+        int len = (sizeof(lname)>sizeof(threadName)) ?
+          (sizeof(threadName) -1):(sizeof(lname) - 1);
+        memcpy(lname, threadName, len);
+        lname[len] = 0;
+        // set the thread name here
+        pthread_setname_np(mThandle, lname);
+
+        // detach, if not joinable
+        if (!joinable) {
+            pthread_detach(mThandle);
+        }
+    } else {
+        // must set these values upon failure
+        mRunnable = NULL;
+        mJoinable = false;
+        mRefCount = 1;
+    }
+}
+
+inline
+LocThreadDelegate::~LocThreadDelegate() {
+    // at this point nothing should need done any more
+}
+
+// factory method so that we could return NULL upon failure
+LocThreadDelegate* LocThreadDelegate::create(LocThread::tCreate creator,
+        const char* threadName, LocRunnable* runnable, bool joinable) {
+    LocThreadDelegate* thread = NULL;
+    if (runnable) {
+        thread = new LocThreadDelegate(creator, threadName, runnable, joinable);
+        if (thread && !thread->isRunning()) {
+            thread->destroy();
+            thread = NULL;
+        }
+    }
+
+    return thread;
+}
+
+// The order is importang
+// NULLing mRunnalbe stops the while loop in threadMain()
+// join() if mJoinble must come before destroy() call, as
+// the obj must remain alive at this time so that mThandle
+// remains valud.
+void LocThreadDelegate::stop() {
+    // mRunnable and mJoinable are reset on different triggers.
+    // mRunnable may get nulled on the spawned thread's way out;
+    //           or here.
+    // mJouinable (if ever been true) gets falsed when client
+    //            thread triggers stop, with either a stop()
+    //            call or the client releases thread obj handle.
+    if (mRunnable) {
+        mRunnable = NULL;
+    }
+    if (mJoinable) {
+        mJoinable = false;
+        pthread_join(mThandle, NULL);
+    }
+    // call destroy() to possibly delete the obj
+    destroy();
+}
+
+// method for clients to call to release the obj
+// when it is a detached thread, the client thread
+// and the spawned thread can both try to destroy()
+// asynchronously. And we delete this obj when
+// mRefCount becomes 0.
+void LocThreadDelegate::destroy() {
+    // else case shouldn't happen, unless there is a
+    // leaking obj. But only our code here has such
+    // obj, so if we test our code well, else case
+    // will never happen
+    if (mRefCount > 0) {
+        // we need a flag on the stack
+        bool callDelete = false;
+
+        // critical section between threads
+        pthread_mutex_lock(&mMutex);
+        // last destroy() call
+        callDelete = (1 == mRefCount--);
+        pthread_mutex_unlock(&mMutex);
+
+        // upon last destroy() call we delete this obj
+        if (callDelete) {
+            delete this;
+        }
+    }
+}
+
+void* LocThreadDelegate::threadMain(void* arg) {
+    LocThreadDelegate* locThread = (LocThreadDelegate*)(arg);
+
+    if (locThread) {
+        LocRunnable* runnable = locThread->mRunnable;
+
+        if (runnable) {
+            if (locThread->isRunning()) {
+                runnable->prerun();
+            }
+
+            while (locThread->isRunning() && runnable->run());
+
+            if (locThread->isRunning()) {
+                runnable->postrun();
+            }
+
+            // at this time, locThread->mRunnable may or may not be NULL
+            // NULL it just to be safe and clean, as we want the field
+            // in the released memory slot to be NULL.
+            locThread->mRunnable = NULL;
+            delete runnable;
+        }
+        locThread->destroy();
+    }
+
+    return NULL;
+}
+
+LocThread::~LocThread() {
+    if (mThread) {
+        mThread->bye();
+        mThread = NULL;
+    }
+}
+
+bool LocThread::start(tCreate creator, const char* threadName, LocRunnable* runnable, bool joinable) {
+    bool success = false;
+    if (!mThread) {
+        mThread = LocThreadDelegate::create(creator, threadName, runnable, joinable);
+        // true only if thread is created successfully
+        success = (NULL != mThread);
+    }
+    return success;
+}
+
+void LocThread::stop() {
+    if (mThread) {
+        mThread->stop();
+        mThread = NULL;
+    }
+}
+
+#ifdef __LOC_DEBUG__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+class LocRunnableTest1 : public LocRunnable {
+    int mID;
+public:
+    LocRunnableTest1(int id) : LocRunnable(), mID(id) {}
+    virtual bool run() {
+        printf("LocRunnableTest1: %d\n", mID++);
+        sleep(1);
+        return true;
+    }
+};
+
+// on linux command line:
+// compile: g++ -D__LOC_HOST_DEBUG__ -D__LOC_DEBUG__ -g -std=c++0x -I. -I../../../../vendor/qcom/proprietary/gps-internal/unit-tests/fakes_for_host -I../../../../system/core/include -lpthread LocThread.cpp
+// test detached thread: valgrind ./a.out 0
+// test joinable thread: valgrind ./a.out 1
+int main(int argc, char** argv) {
+    LocRunnableTest1 test(10);
+
+    LocThread thread;
+    thread.start("LocThreadTest", test, atoi(argv[1]));
+
+    sleep(10);
+
+    thread.stop();
+
+    sleep(5);
+
+    return 0;
+}
+
+#endif
diff --git a/gps/utils/LocThread.h b/gps/utils/LocThread.h
new file mode 100644
index 0000000..2a65d8f
--- /dev/null
+++ b/gps/utils/LocThread.h
@@ -0,0 +1,92 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ifndef __LOC_THREAD__
+#define __LOC_THREAD__
+
+#include <stddef.h>
+#include <pthread.h>
+
+// abstract class to be implemented by client to provide a runnable class
+// which gets scheduled by LocThread
+class LocRunnable {
+public:
+    inline LocRunnable() {}
+    inline virtual ~LocRunnable() {}
+
+    // The method to be implemented by thread clients
+    // and be scheduled by LocThread
+    // This method will be repeated called until it returns false; or
+    // until thread is stopped.
+    virtual bool run() = 0;
+
+    // The method to be run before thread loop (conditionally repeatedly)
+    // calls run()
+    inline virtual void prerun() {}
+
+    // The method to be run after thread loop (conditionally repeatedly)
+    // calls run()
+    inline virtual void postrun() {}
+};
+
+// opaque class to provide service implementation.
+class LocThreadDelegate;
+
+// A utility class to create a thread and run LocRunnable
+// caller passes in.
+class LocThread {
+    LocThreadDelegate* mThread;
+public:
+    inline LocThread() : mThread(NULL) {}
+    virtual ~LocThread();
+
+    typedef pthread_t (*tCreate)(const char* name, void* (*start)(void*), void* arg);
+    // client starts thread with a runnable, which implements
+    // the logics to fun in the created thread context.
+    // The thread could be either joinable or detached.
+    // runnable is an obj managed by client. Client creates and
+    //          frees it (but must be after stop() is called, or
+    //          this LocThread obj is deleted).
+    //          The obj will be deleted by LocThread if start()
+    //          returns true. Else it is client's responsibility
+    //          to delete the object
+    // Returns 0 if success; false if failure.
+    bool start(tCreate creator, const char* threadName, LocRunnable* runnable, bool joinable = true);
+    inline bool start(const char* threadName, LocRunnable* runnable, bool joinable = true) {
+        return start(NULL, threadName, runnable, joinable);
+    }
+
+    // NOTE: if this is a joinable thread, this stop may block
+    // for a while until the thread is joined.
+    void stop();
+
+    // thread status check
+    inline bool isRunning() { return NULL != mThread; }
+};
+
+#endif //__LOC_THREAD__
diff --git a/gps/utils/LocTimer.cpp b/gps/utils/LocTimer.cpp
new file mode 100644
index 0000000..5b653eb
--- /dev/null
+++ b/gps/utils/LocTimer.cpp
@@ -0,0 +1,751 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <errno.h>
+#include <loc_timer.h>
+#include <sys/timerfd.h>
+#include <sys/epoll.h>
+#include <LocTimer.h>
+#include <LocHeap.h>
+#include <LocThread.h>
+#include <LocSharedLock.h>
+#include <MsgTask.h>
+
+#ifdef __HOST_UNIT_TEST__
+#define EPOLLWAKEUP 0
+#define CLOCK_BOOTTIME CLOCK_MONOTONIC
+#define CLOCK_BOOTTIME_ALARM CLOCK_MONOTONIC
+#endif
+
+/*
+There are implementations of 5 classes in this file:
+LocTimer, LocTimerDelegate, LocTimerContainer, LocTimerPollTask, LocTimerWrapper
+
+LocTimer - client front end, interface for client to start / stop timers, also
+           to provide a callback.
+LocTimerDelegate - an internal timer entity, which also is a LocRankable obj.
+                   Its life cycle is different than that of LocTimer. It gets
+                   created when LocTimer::start() is called, and gets deleted
+                   when it expires or clients calls the hosting LocTimer obj's
+                   stop() method. When a LocTimerDelegate obj is ticking, it
+                   stays in the corresponding LocTimerContainer. When expired
+                   or stopped, the obj is removed from the container. Since it
+                   is also a LocRankable obj, and LocTimerContainer also is a
+                   heap, its ranks() implementation decides where it is placed
+                   in the heap.
+LocTimerContainer - core of the timer service. It is a container (derived from
+                    LocHeap) for LocTimerDelegate (implements LocRankable) objs.
+                    There are 2 of such containers, one for sw timers (or Linux
+                    timers) one for hw timers (or Linux alarms). It adds one of
+                    each (those that expire the soonest) to kernel via services
+                    provided by LocTimerPollTask. All the heap management on the
+                    LocTimerDelegate objs are done in the MsgTask context, such
+                    that synchronization is ensured.
+LocTimerPollTask - is a class that wraps timerfd and epoll POXIS APIs. It also
+                   both implements LocRunnalbe with epoll_wait() in the run()
+                   method. It is also a LocThread client, so as to loop the run
+                   method.
+LocTimerWrapper - a LocTimer client itself, to implement the existing C API with
+                  APIs, loc_timer_start() and loc_timer_stop().
+
+*/
+
+class LocTimerPollTask;
+
+// This is a multi-functaional class that:
+// * extends the LocHeap class for the detection of head update upon add / remove
+//   events. When that happens, soonest time out changes, so timerfd needs update.
+// * contains the timers, and add / remove them into the heap
+// * provides and maps 2 of such containers, one for timers (or  mSwTimers), one
+//   for alarms (or mHwTimers);
+// * provides a polling thread;
+// * provides a MsgTask thread for synchronized add / remove / timer client callback.
+class LocTimerContainer : public LocHeap {
+    // mutex to synchronize getters of static members
+    static pthread_mutex_t mMutex;
+    // Container of timers
+    static LocTimerContainer* mSwTimers;
+    // Container of alarms
+    static LocTimerContainer* mHwTimers;
+    // Msg task to provider msg Q, sender and reader.
+    static MsgTask* mMsgTask;
+    // Poll task to provide epoll call and threading to poll.
+    static LocTimerPollTask* mPollTask;
+    // timer / alarm fd
+    int mDevFd;
+    // ctor
+    LocTimerContainer(bool wakeOnExpire);
+    // dtor
+    ~LocTimerContainer();
+    static MsgTask* getMsgTaskLocked();
+    static LocTimerPollTask* getPollTaskLocked();
+    // extend LocHeap and pop if the top outRanks input
+    LocTimerDelegate* popIfOutRanks(LocTimerDelegate& timer);
+    // update the timer POSIX calls with updated soonest timer spec
+    void updateSoonestTime(LocTimerDelegate* priorTop);
+
+public:
+    // factory method to control the creation of mSwTimers / mHwTimers
+    static LocTimerContainer* get(bool wakeOnExpire);
+
+    LocTimerDelegate* getSoonestTimer();
+    int getTimerFd();
+    // add a timer / alarm obj into the container
+    void add(LocTimerDelegate& timer);
+    // remove a timer / alarm obj from the container
+    void remove(LocTimerDelegate& timer);
+    // handling of timer / alarm expiration
+    void expire();
+};
+
+// This class implements the polling thread that epolls imer / alarm fds.
+// The LocRunnable::run() contains the actual polling.  The other methods
+// will be run in the caller's thread context to add / remove timer / alarm
+// fds the kernel, while the polling is blocked on epoll_wait() call.
+// Since the design is that we have maximally 2 polls, one for all the
+// timers; one for all the alarms, we will poll at most on 2 fds.  But it
+// is possile that all we have are only timers or alarms at one time, so we
+// allow dynamically add / remove fds we poll on. The design decision of
+// having 1 fd per container of timer / alarm is such that, we may not need
+// to make a system call each time a timer / alarm is added / removed, unless
+// that changes the "soonest" time out of that of all the timers / alarms.
+class LocTimerPollTask : public LocRunnable {
+    // the epoll fd
+    const int mFd;
+    // the thread that calls run() method
+    LocThread* mThread;
+    friend class LocThreadDelegate;
+    // dtor
+    ~LocTimerPollTask();
+public:
+    // ctor
+    LocTimerPollTask();
+    // this obj will be deleted once thread is deleted
+    void destroy();
+    // add a container of timers. Each contain has a unique device fd, i.e.
+    // either timer or alarm fd, and a heap of timers / alarms. It is expected
+    // that container would have written to the device fd with the soonest
+    // time out value in the heap at the time of calling this method. So all
+    // this method does is to add the fd of the input container to the poll
+    // and also add the pointer of the container to the event data ptr, such
+    // when poll_wait wakes up on events, we know who is the owner of the fd.
+    void addPoll(LocTimerContainer& timerContainer);
+    // remove a fd that is assciated with a container. The expectation is that
+    // the atual timer would have been removed from the container.
+    void removePoll(LocTimerContainer& timerContainer);
+    // The polling thread context will call this method. This is where
+    // epoll_wait() is blocking and waiting for events..
+    virtual bool run();
+};
+
+// Internal class of timer obj. It gets born when client calls LocTimer::start();
+// and gets deleted when client calls LocTimer::stop() or when the it expire()'s.
+// This class implements LocRankable::ranks() so that when an obj is added into
+// the container (of LocHeap), it gets placed in sorted order.
+class LocTimerDelegate : public LocRankable {
+    friend class LocTimerContainer;
+    friend class LocTimer;
+    LocTimer* mClient;
+    LocSharedLock* mLock;
+    struct timespec mFutureTime;
+    LocTimerContainer* mContainer;
+    // not a complete obj, just ctor for LocRankable comparisons
+    inline LocTimerDelegate(struct timespec& delay)
+        : mClient(NULL), mLock(NULL), mFutureTime(delay), mContainer(NULL) {}
+    inline ~LocTimerDelegate() { if (mLock) { mLock->drop(); mLock = NULL; } }
+public:
+    LocTimerDelegate(LocTimer& client, struct timespec& futureTime, LocTimerContainer* container);
+    void destroyLocked();
+    // LocRankable virtual method
+    virtual int ranks(LocRankable& rankable);
+    void expire();
+    inline struct timespec getFutureTime() { return mFutureTime; }
+};
+
+/***************************LocTimerContainer methods***************************/
+
+// Most of these static recources are created on demand. They however are never
+// destoyed. The theory is that there are processes that link to this util lib
+// but never use timer, then these resources would never need to be created.
+// For those processes that do use timer, it will likely also need to every
+// once in a while. It might be cheaper keeping them around.
+pthread_mutex_t LocTimerContainer::mMutex = PTHREAD_MUTEX_INITIALIZER;
+LocTimerContainer* LocTimerContainer::mSwTimers = NULL;
+LocTimerContainer* LocTimerContainer::mHwTimers = NULL;
+MsgTask* LocTimerContainer::mMsgTask = NULL;
+LocTimerPollTask* LocTimerContainer::mPollTask = NULL;
+
+// ctor - initialize timer heaps
+// A container for swTimer (timer) is created, when wakeOnExpire is true; or
+// HwTimer (alarm), when wakeOnExpire is false.
+LocTimerContainer::LocTimerContainer(bool wakeOnExpire) :
+    mDevFd(timerfd_create(wakeOnExpire ? CLOCK_BOOTTIME_ALARM : CLOCK_BOOTTIME, 0)) {
+
+    if ((-1 == mDevFd) && (errno == EINVAL)) {
+        LOC_LOGW("%s: timerfd_create failure, fallback to CLOCK_MONOTONIC - %s",
+            __FUNCTION__, strerror(errno));
+        mDevFd = timerfd_create(CLOCK_MONOTONIC, 0);
+    }
+
+    if (-1 != mDevFd) {
+        // ensure we have the necessary resources created
+        LocTimerContainer::getPollTaskLocked();
+        LocTimerContainer::getMsgTaskLocked();
+    } else {
+        LOC_LOGE("%s: timerfd_create failure - %s", __FUNCTION__, strerror(errno));
+    }
+}
+
+// dtor
+// we do not ever destroy the static resources.
+inline
+LocTimerContainer::~LocTimerContainer() {
+    close(mDevFd);
+}
+
+LocTimerContainer* LocTimerContainer::get(bool wakeOnExpire) {
+    // get the reference of either mHwTimer or mSwTimers per wakeOnExpire
+    LocTimerContainer*& container = wakeOnExpire ? mHwTimers : mSwTimers;
+    // it is cheap to check pointer first than locking mutext unconditionally
+    if (!container) {
+        pthread_mutex_lock(&mMutex);
+        // let's check one more time to be safe
+        if (!container) {
+            container = new LocTimerContainer(wakeOnExpire);
+            // timerfd_create failure
+            if (-1 == container->getTimerFd()) {
+                delete container;
+                container = NULL;
+            }
+        }
+        pthread_mutex_unlock(&mMutex);
+    }
+    return container;
+}
+
+MsgTask* LocTimerContainer::getMsgTaskLocked() {
+    // it is cheap to check pointer first than locking mutext unconditionally
+    if (!mMsgTask) {
+        mMsgTask = new MsgTask("LocTimerMsgTask", false);
+    }
+    return mMsgTask;
+}
+
+LocTimerPollTask* LocTimerContainer::getPollTaskLocked() {
+    // it is cheap to check pointer first than locking mutext unconditionally
+    if (!mPollTask) {
+        mPollTask = new LocTimerPollTask();
+    }
+    return mPollTask;
+}
+
+inline
+LocTimerDelegate* LocTimerContainer::getSoonestTimer() {
+    return (LocTimerDelegate*)(peek());
+}
+
+inline
+int LocTimerContainer::getTimerFd() {
+    return mDevFd;
+}
+
+void LocTimerContainer::updateSoonestTime(LocTimerDelegate* priorTop) {
+    LocTimerDelegate* curTop = getSoonestTimer();
+
+    // check if top has changed
+    if (curTop != priorTop) {
+        struct itimerspec delay;
+        memset(&delay, 0, sizeof(struct itimerspec));
+        bool toSetTime = false;
+        // if tree is empty now, we remove poll and disarm timer
+        if (!curTop) {
+            mPollTask->removePoll(*this);
+            // setting the values to disarm timer
+            delay.it_value.tv_sec = 0;
+            delay.it_value.tv_nsec = 0;
+            toSetTime = true;
+        } else if (!priorTop || curTop->outRanks(*priorTop)) {
+            // do this first to avoid race condition, in case settime is called
+            // with too small an interval
+            mPollTask->addPoll(*this);
+            delay.it_value = curTop->getFutureTime();
+            toSetTime = true;
+        }
+        if (toSetTime) {
+            timerfd_settime(getTimerFd(), TFD_TIMER_ABSTIME, &delay, NULL);
+        }
+    }
+}
+
+// all the heap management is done in the MsgTask context.
+inline
+void LocTimerContainer::add(LocTimerDelegate& timer) {
+    struct MsgTimerPush : public LocMsg {
+        LocTimerContainer* mTimerContainer;
+        LocHeapNode* mTree;
+        LocTimerDelegate* mTimer;
+        inline MsgTimerPush(LocTimerContainer& container, LocTimerDelegate& timer) :
+            LocMsg(), mTimerContainer(&container), mTimer(&timer) {}
+        inline virtual void proc() const {
+            LocTimerDelegate* priorTop = mTimerContainer->getSoonestTimer();
+            mTimerContainer->push((LocRankable&)(*mTimer));
+            mTimerContainer->updateSoonestTime(priorTop);
+        }
+    };
+
+    mMsgTask->sendMsg(new MsgTimerPush(*this, timer));
+}
+
+// all the heap management is done in the MsgTask context.
+void LocTimerContainer::remove(LocTimerDelegate& timer) {
+    struct MsgTimerRemove : public LocMsg {
+        LocTimerContainer* mTimerContainer;
+        LocTimerDelegate* mTimer;
+        inline MsgTimerRemove(LocTimerContainer& container, LocTimerDelegate& timer) :
+            LocMsg(), mTimerContainer(&container), mTimer(&timer) {}
+        inline virtual void proc() const {
+            LocTimerDelegate* priorTop = mTimerContainer->getSoonestTimer();
+
+            // update soonest timer only if mTimer is actually removed from
+            // mTimerContainer AND mTimer is not priorTop.
+            if (priorTop == ((LocHeap*)mTimerContainer)->remove((LocRankable&)*mTimer)) {
+                // if passing in NULL, we tell updateSoonestTime to update
+                // kernel with the current top timer interval.
+                mTimerContainer->updateSoonestTime(NULL);
+            }
+            // all timers are deleted here, and only here.
+            delete mTimer;
+        }
+    };
+
+    mMsgTask->sendMsg(new MsgTimerRemove(*this, timer));
+}
+
+// all the heap management is done in the MsgTask context.
+// Upon expire, we check and continuously pop the heap until
+// the top node's timeout is in the future.
+void LocTimerContainer::expire() {
+    struct MsgTimerExpire : public LocMsg {
+        LocTimerContainer* mTimerContainer;
+        inline MsgTimerExpire(LocTimerContainer& container) :
+            LocMsg(), mTimerContainer(&container) {}
+        inline virtual void proc() const {
+            struct timespec now;
+            // get time spec of now
+            clock_gettime(CLOCK_BOOTTIME, &now);
+            LocTimerDelegate timerOfNow(now);
+            // pop everything in the heap that outRanks now, i.e. has time older than now
+            // and then call expire() on that timer.
+            for (LocTimerDelegate* timer = (LocTimerDelegate*)mTimerContainer->pop();
+                 NULL != timer;
+                 timer = mTimerContainer->popIfOutRanks(timerOfNow)) {
+                // the timer delegate obj will be deleted before the return of this call
+                timer->expire();
+            }
+            mTimerContainer->updateSoonestTime(NULL);
+        }
+    };
+
+    struct itimerspec delay;
+    memset(&delay, 0, sizeof(struct itimerspec));
+    timerfd_settime(getTimerFd(), TFD_TIMER_ABSTIME, &delay, NULL);
+    mPollTask->removePoll(*this);
+    mMsgTask->sendMsg(new MsgTimerExpire(*this));
+}
+
+LocTimerDelegate* LocTimerContainer::popIfOutRanks(LocTimerDelegate& timer) {
+    LocTimerDelegate* poppedNode = NULL;
+    if (mTree && !timer.outRanks(*peek())) {
+        poppedNode = (LocTimerDelegate*)(pop());
+    }
+
+    return poppedNode;
+}
+
+
+/***************************LocTimerPollTask methods***************************/
+
+inline
+LocTimerPollTask::LocTimerPollTask()
+    : mFd(epoll_create(2)), mThread(new LocThread()) {
+    // before a next call returens, a thread will be created. The run() method
+    // could already be running in parallel. Also, since each of the objs
+    // creates a thread, the container will make sure that there will be only
+    // one of such obj for our timer implementation.
+    if (!mThread->start("LocTimerPollTask", this)) {
+        delete mThread;
+        mThread = NULL;
+    }
+}
+
+inline
+LocTimerPollTask::~LocTimerPollTask() {
+    // when fs is closed, epoll_wait() should fail run() should return false
+    // and the spawned thread should exit.
+    close(mFd);
+}
+
+void LocTimerPollTask::destroy() {
+    if (mThread) {
+        LocThread* thread = mThread;
+        mThread = NULL;
+        delete thread;
+    } else {
+        delete this;
+    }
+}
+
+void LocTimerPollTask::addPoll(LocTimerContainer& timerContainer) {
+    struct epoll_event ev;
+    memset(&ev, 0, sizeof(ev));
+
+    ev.events = EPOLLIN | EPOLLWAKEUP;
+    ev.data.fd = timerContainer.getTimerFd();
+    // it is important that we set this context pointer with the input
+    // timer container this is how we know which container should handle
+    // which expiration.
+    ev.data.ptr = &timerContainer;
+
+    epoll_ctl(mFd, EPOLL_CTL_ADD, timerContainer.getTimerFd(), &ev);
+}
+
+inline
+void LocTimerPollTask::removePoll(LocTimerContainer& timerContainer) {
+    epoll_ctl(mFd, EPOLL_CTL_DEL, timerContainer.getTimerFd(), NULL);
+}
+
+// The polling thread context will call this method. If run() method needs to
+// be repetitvely called, it must return true from the previous call.
+bool LocTimerPollTask::run() {
+    struct epoll_event ev[2];
+
+    // we have max 2 descriptors to poll from
+    int fds = epoll_wait(mFd, ev, 2, -1);
+
+    // we pretty much want to continually poll until the fd is closed
+    bool rerun = (fds > 0) || (errno == EINTR);
+
+    if (fds > 0) {
+        // we may have 2 events
+        for (int i = 0; i < fds; i++) {
+            // each fd has a context pointer associated with the right timer container
+            LocTimerContainer* container = (LocTimerContainer*)(ev[i].data.ptr);
+            if (container) {
+                container->expire();
+            } else {
+                epoll_ctl(mFd, EPOLL_CTL_DEL, ev[i].data.fd, NULL);
+            }
+        }
+    }
+
+    // if rerun is true, we are requesting to be scheduled again
+    return rerun;
+}
+
+/***************************LocTimerDelegate methods***************************/
+
+inline
+LocTimerDelegate::LocTimerDelegate(LocTimer& client,
+                                   struct timespec& futureTime,
+                                   LocTimerContainer* container)
+    : mClient(&client),
+      mLock(mClient->mLock->share()),
+      mFutureTime(futureTime),
+      mContainer(container) {
+    // adding the timer into the container
+    mContainer->add(*this);
+}
+
+inline
+void LocTimerDelegate::destroyLocked() {
+    // client handle will likely be deleted soon after this
+    // method returns. Nulling this handle so that expire()
+    // won't call the callback on the dead handle any more.
+    mClient = NULL;
+
+    if (mContainer) {
+        LocTimerContainer* container = mContainer;
+        mContainer = NULL;
+        if (container) {
+            container->remove(*this);
+        }
+    } // else we do not do anything. No such *this* can be
+      // created and reached here with mContainer ever been
+      // a non NULL. So *this* must have reached the if clause
+      // once, and we want it reach there only once.
+}
+
+int LocTimerDelegate::ranks(LocRankable& rankable) {
+    int rank = -1;
+    LocTimerDelegate* timer = (LocTimerDelegate*)(&rankable);
+    if (timer) {
+        // larger time ranks lower!!!
+        // IOW, if input obj has bigger tv_sec/tv_nsec, this obj outRanks higher
+        rank = timer->mFutureTime.tv_sec - mFutureTime.tv_sec;
+        if(0 == rank)
+        {
+            //rank against tv_nsec for msec accuracy
+            rank = (int)(timer->mFutureTime.tv_nsec - mFutureTime.tv_nsec);
+        }
+    }
+    return rank;
+}
+
+inline
+void LocTimerDelegate::expire() {
+    // keeping a copy of client pointer to be safe
+    // when timeOutCallback() is called at the end of this
+    // method, *this* obj may be already deleted.
+    LocTimer* client = mClient;
+    // force a stop, which will lead to delete of this obj
+    if (client && client->stop()) {
+        // calling client callback with a pointer save on the stack
+        // only if stop() returns true, i.e. it hasn't been stopped
+        // already.
+        client->timeOutCallback();
+    }
+}
+
+
+/***************************LocTimer methods***************************/
+LocTimer::LocTimer() : mTimer(NULL), mLock(new LocSharedLock()) {
+}
+
+LocTimer::~LocTimer() {
+    stop();
+    if (mLock) {
+        mLock->drop();
+        mLock = NULL;
+    }
+}
+
+bool LocTimer::start(unsigned int timeOutInMs, bool wakeOnExpire) {
+    bool success = false;
+    mLock->lock();
+    if (!mTimer) {
+        struct timespec futureTime;
+        clock_gettime(CLOCK_BOOTTIME, &futureTime);
+        futureTime.tv_sec += timeOutInMs / 1000;
+        futureTime.tv_nsec += (timeOutInMs % 1000) * 1000000;
+        if (futureTime.tv_nsec >= 1000000000) {
+            futureTime.tv_sec += futureTime.tv_nsec / 1000000000;
+            futureTime.tv_nsec %= 1000000000;
+        }
+
+        LocTimerContainer* container;
+        container = LocTimerContainer::get(wakeOnExpire);
+        if (NULL != container) {
+            mTimer = new LocTimerDelegate(*this, futureTime, container);
+            // if mTimer is non 0, success should be 0; or vice versa
+        }
+        success = (NULL != mTimer);
+    }
+    mLock->unlock();
+    return success;
+}
+
+bool LocTimer::stop() {
+    bool success = false;
+    mLock->lock();
+    if (mTimer) {
+        LocTimerDelegate* timer = mTimer;
+        mTimer = NULL;
+        if (timer) {
+            timer->destroyLocked();
+            success = true;
+        }
+    }
+    mLock->unlock();
+    return success;
+}
+
+/***************************LocTimerWrapper methods***************************/
+//////////////////////////////////////////////////////////////////////////
+// This section below wraps for the C style APIs
+//////////////////////////////////////////////////////////////////////////
+class LocTimerWrapper : public LocTimer {
+    loc_timer_callback mCb;
+    void* mCallerData;
+    LocTimerWrapper* mMe;
+    static pthread_mutex_t mMutex;
+    inline ~LocTimerWrapper() { mCb = NULL; mMe = NULL; }
+public:
+    inline LocTimerWrapper(loc_timer_callback cb, void* callerData) :
+        mCb(cb), mCallerData(callerData), mMe(this) {
+    }
+    void destroy() {
+        pthread_mutex_lock(&mMutex);
+        if (NULL != mCb && this == mMe) {
+            delete this;
+        }
+        pthread_mutex_unlock(&mMutex);
+    }
+    virtual void timeOutCallback() {
+        loc_timer_callback cb = mCb;
+        void* callerData = mCallerData;
+        if (cb) {
+            cb(callerData, 0);
+        }
+        destroy();
+    }
+};
+
+pthread_mutex_t LocTimerWrapper::mMutex = PTHREAD_MUTEX_INITIALIZER;
+
+void* loc_timer_start(uint64_t msec, loc_timer_callback cb_func,
+                      void *caller_data, bool wake_on_expire)
+{
+    LocTimerWrapper* locTimerWrapper = NULL;
+
+    if (cb_func) {
+        locTimerWrapper = new LocTimerWrapper(cb_func, caller_data);
+
+        if (locTimerWrapper) {
+            locTimerWrapper->start(msec, wake_on_expire);
+        }
+    }
+
+    return locTimerWrapper;
+}
+
+void loc_timer_stop(void*&  handle)
+{
+    if (handle) {
+        LocTimerWrapper* locTimerWrapper = (LocTimerWrapper*)(handle);
+        locTimerWrapper->destroy();
+        handle = NULL;
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+// This section above wraps for the C style APIs
+//////////////////////////////////////////////////////////////////////////
+
+#ifdef __LOC_DEBUG__
+
+double getDeltaSeconds(struct timespec from, struct timespec to) {
+    return (double)to.tv_sec + (double)to.tv_nsec / 1000000000
+        - from.tv_sec - (double)from.tv_nsec / 1000000000;
+}
+
+struct timespec getNow() {
+    struct timespec now;
+    clock_gettime(CLOCK_BOOTTIME, &now);
+    return now;
+}
+
+class LocTimerTest : public LocTimer, public LocRankable {
+    int mTimeOut;
+    const struct timespec mTimeOfBirth;
+    inline struct timespec getTimerWrapper(int timeout) {
+        struct timespec now;
+        clock_gettime(CLOCK_BOOTTIME, &now);
+        now.tv_sec += timeout;
+        return now;
+    }
+public:
+    inline LocTimerTest(int timeout) : LocTimer(), LocRankable(),
+            mTimeOut(timeout), mTimeOfBirth(getTimerWrapper(0)) {}
+    inline virtual int ranks(LocRankable& rankable) {
+        LocTimerTest* timer = dynamic_cast<LocTimerTest*>(&rankable);
+        return timer->mTimeOut - mTimeOut;
+    }
+    inline virtual void timeOutCallback() {
+        printf("timeOutCallback() - ");
+        deviation();
+    }
+    double deviation() {
+        struct timespec now = getTimerWrapper(0);
+        double delta = getDeltaSeconds(mTimeOfBirth, now);
+        printf("%lf: %lf\n", delta, delta * 100 / mTimeOut);
+        return delta / mTimeOut;
+    }
+};
+
+// For Linux command line testing:
+// compilation:
+//     g++ -D__LOC_HOST_DEBUG__ -D__LOC_DEBUG__ -g -I. -I../../../../system/core/include -o LocHeap.o LocHeap.cpp
+//     g++ -D__LOC_HOST_DEBUG__ -D__LOC_DEBUG__ -g -std=c++0x -I. -I../../../../system/core/include -lpthread -o LocThread.o LocThread.cpp
+//     g++ -D__LOC_HOST_DEBUG__ -D__LOC_DEBUG__ -g -I. -I../../../../system/core/include -o LocTimer.o LocTimer.cpp
+int main(int argc, char** argv) {
+    struct timespec timeOfStart=getNow();
+    srand(time(NULL));
+    int tries = atoi(argv[1]);
+    int checks = tries >> 3;
+    LocTimerTest** timerArray = new LocTimerTest*[tries];
+    memset(timerArray, NULL, tries);
+
+    for (int i = 0; i < tries; i++) {
+        int r = rand() % tries;
+        LocTimerTest* timer = new LocTimerTest(r);
+        if (timerArray[r]) {
+            if (!timer->stop()) {
+                printf("%lf:\n", getDeltaSeconds(timeOfStart, getNow()));
+                printf("ERRER: %dth timer, id %d, not running when it should be\n", i, r);
+                exit(0);
+            } else {
+                printf("stop() - %d\n", r);
+                delete timer;
+                timerArray[r] = NULL;
+            }
+        } else {
+            if (!timer->start(r, false)) {
+                printf("%lf:\n", getDeltaSeconds(timeOfStart, getNow()));
+                printf("ERRER: %dth timer, id %d, running when it should not be\n", i, r);
+                exit(0);
+            } else {
+                printf("stop() - %d\n", r);
+                timerArray[r] = timer;
+            }
+        }
+    }
+
+    for (int i = 0; i < tries; i++) {
+        if (timerArray[i]) {
+            if (!timerArray[i]->stop()) {
+                printf("%lf:\n", getDeltaSeconds(timeOfStart, getNow()));
+                printf("ERRER: %dth timer, not running when it should be\n", i);
+                exit(0);
+            } else {
+                printf("stop() - %d\n", i);
+                delete timerArray[i];
+                timerArray[i] = NULL;
+            }
+        }
+    }
+
+    delete[] timerArray;
+
+    return 0;
+}
+
+#endif
diff --git a/gps/utils/LocTimer.h b/gps/utils/LocTimer.h
new file mode 100644
index 0000000..c6a6362
--- /dev/null
+++ b/gps/utils/LocTimer.h
@@ -0,0 +1,74 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef __LOC_TIMER_CPP_H__
+#define __LOC_TIMER_CPP_H__
+
+#include <stddef.h>
+#include <platform_lib_includes.h>
+
+// opaque class to provide service implementation.
+class LocTimerDelegate;
+class LocSharedLock;
+
+// LocTimer client must extend this class and implementthe callback.
+// start() / stop() methods are to arm / disarm timer.
+class LocTimer
+{
+    LocTimerDelegate* mTimer;
+    LocSharedLock* mLock;
+    // don't really want mLock to be manipulated by clients, yet LocTimer
+    // has to have a reference to the lock so that the delete of LocTimer
+    // and LocTimerDelegate can work together on their share resources.
+    friend class LocTimerDelegate;
+
+public:
+    LocTimer();
+    virtual ~LocTimer();
+
+    // timeOutInMs:  timeout delay in ms
+    // wakeOnExpire: true if to wake up CPU (if sleeping) upon timer
+    //                        expiration and notify the client.
+    //               false if to wait until next time CPU wakes up (if
+    //                        sleeping) and then notify the client.
+    // return:       true on success;
+    //               false on failure, e.g. timer is already running.
+    bool start(uint32_t timeOutInMs, bool wakeOnExpire);
+
+    // return:       true on success;
+    //               false on failure, e.g. timer is not running.
+    bool stop();
+
+    //  LocTimer client Should implement this method.
+    //  This method is used for timeout calling back to client. This method
+    //  should be short enough (eg: send a message to your own thread).
+    virtual void timeOutCallback() = 0;
+};
+
+#endif //__LOC_DELAY_H__
diff --git a/gps/utils/Makefile.am b/gps/utils/Makefile.am
new file mode 100644
index 0000000..33a87da
--- /dev/null
+++ b/gps/utils/Makefile.am
@@ -0,0 +1,64 @@
+AM_CFLAGS = -Wundef \
+         -I./ \
+         -std=c++11 \
+         $(LOCPLA_CFLAGS)
+
+AM_CPPFLAGS = -Wundef \
+         -I./ \
+         -std=c++11 \
+         $(LOCPLA_CFLAGS)
+
+libgps_utils_so_la_h_sources = \
+        msg_q.h \
+        linked_list.h \
+        loc_cfg.h \
+        loc_log.h \
+        loc_target.h \
+        loc_timer.h \
+        MsgTask.h \
+        LocHeap.h \
+        LocThread.h \
+        LocTimer.h \
+        loc_misc_utils.h \
+        loc_nmea.h \
+        gps_extended_c.h \
+        gps_extended.h \
+        loc_gps.h
+
+libgps_utils_so_la_c_sources = \
+        linked_list.c \
+        msg_q.c \
+        loc_cfg.cpp \
+        loc_log.cpp \
+        loc_target.cpp \
+        LocHeap.cpp \
+        LocTimer.cpp \
+        LocThread.cpp \
+        MsgTask.cpp \
+        loc_misc_utils.cpp \
+        loc_nmea.cpp
+
+
+library_include_HEADERS = $(libgps_utils_so_la_h_sources)
+
+libgps_utils_so_la_SOURCES = $(libgps_utils_so_la_c_sources)
+
+if USE_GLIB
+libgps_utils_so_la_CFLAGS = -DUSE_GLIB $(AM_CFLAGS) @GLIB_CFLAGS@
+libgps_utils_so_la_LDFLAGS = -lstdc++ -Wl,-z,defs -lpthread @GLIB_LIBS@ -shared -version-info 1:0:0
+libgps_utils_so_la_CPPFLAGS = -DUSE_GLIB $(AM_CFLAGS) $(AM_CPPFLAGS) @GLIB_CFLAGS@
+else
+libgps_utils_so_la_CFLAGS = $(AM_CFLAGS)
+libgps_utils_so_la_LDFLAGS = -Wl,-z,defs -lpthread -shared -version-info 1:0:0
+libgps_utils_so_la_CPPFLAGS = $(AM_CFLAGS) $(AM_CPPFLAGS)
+endif
+
+libgps_utils_so_la_LIBADD = -lcutils -lstdc++ -llog $(LOCPLA_LIBS)
+
+#Create and Install libraries
+lib_LTLIBRARIES = libgps_utils_so.la
+library_includedir = $(pkgincludedir)
+pkgconfigdir = $(libdir)/pkgconfig
+
+pkgconfig_DATA = gps-utils.pc
+EXTRA_DIST = $(pkgconfig_DATA)
diff --git a/gps/utils/MsgTask.cpp b/gps/utils/MsgTask.cpp
new file mode 100644
index 0000000..80abeec
--- /dev/null
+++ b/gps/utils/MsgTask.cpp
@@ -0,0 +1,104 @@
+/* Copyright (c) 2011-2013, 2015, 2017The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#define LOG_NDEBUG 0
+#define LOG_TAG "LocSvc_MsgTask"
+
+#include <unistd.h>
+#include <MsgTask.h>
+#include <msg_q.h>
+#include <loc_log.h>
+#include <platform_lib_includes.h>
+
+static void LocMsgDestroy(void* msg) {
+    delete (LocMsg*)msg;
+}
+
+MsgTask::MsgTask(LocThread::tCreate tCreator,
+                 const char* threadName, bool joinable) :
+    mQ(msg_q_init2()), mThread(new LocThread()) {
+    if (!mThread->start(tCreator, threadName, this, joinable)) {
+        delete mThread;
+        mThread = NULL;
+    }
+}
+
+MsgTask::MsgTask(const char* threadName, bool joinable) :
+    mQ(msg_q_init2()), mThread(new LocThread()) {
+    if (!mThread->start(threadName, this, joinable)) {
+        delete mThread;
+        mThread = NULL;
+    }
+}
+
+MsgTask::~MsgTask() {
+    msg_q_flush((void*)mQ);
+    msg_q_destroy((void**)&mQ);
+}
+
+void MsgTask::destroy() {
+    LocThread* thread = mThread;
+    msg_q_unblock((void*)mQ);
+    if (thread) {
+        mThread = NULL;
+        delete thread;
+    } else {
+        delete this;
+    }
+}
+
+void MsgTask::sendMsg(const LocMsg* msg) const {
+    if (msg) {
+        msg_q_snd((void*)mQ, (void*)msg, LocMsgDestroy);
+    } else {
+        LOC_LOGE("%s: msg is NULL", __func__);
+    }
+}
+
+void MsgTask::prerun() {
+    // make sure we do not run in background scheduling group
+     platform_lib_abstraction_set_sched_policy(platform_lib_abstraction_gettid(), PLA_SP_FOREGROUND);
+}
+
+bool MsgTask::run() {
+    LocMsg* msg;
+    msq_q_err_type result = msg_q_rcv((void*)mQ, (void **)&msg);
+    if (eMSG_Q_SUCCESS != result) {
+        LOC_LOGE("%s:%d] fail receiving msg: %s\n", __func__, __LINE__,
+                 loc_get_msg_q_status(result));
+        return false;
+    }
+
+    msg->log();
+    // there is where each individual msg handling is invoked
+    msg->proc();
+
+    delete msg;
+
+    return true;
+}
diff --git a/gps/utils/MsgTask.h b/gps/utils/MsgTask.h
new file mode 100644
index 0000000..9eb1f56
--- /dev/null
+++ b/gps/utils/MsgTask.h
@@ -0,0 +1,67 @@
+/* Copyright (c) 2011-2013,2015 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ifndef __MSG_TASK__
+#define __MSG_TASK__
+
+#include <LocThread.h>
+
+struct LocMsg {
+    inline LocMsg() {}
+    inline virtual ~LocMsg() {}
+    virtual void proc() const = 0;
+    inline virtual void log() const {}
+};
+
+class MsgTask : public LocRunnable {
+    const void* mQ;
+    LocThread* mThread;
+    friend class LocThreadDelegate;
+protected:
+    virtual ~MsgTask();
+public:
+    MsgTask(LocThread::tCreate tCreator, const char* threadName = NULL, bool joinable = true);
+    MsgTask(const char* threadName = NULL, bool joinable = true);
+    // this obj will be deleted once thread is deleted
+    void destroy();
+    void sendMsg(const LocMsg* msg) const;
+    // Overrides of LocRunnable methods
+    // This method will be repeated called until it returns false; or
+    // until thread is stopped.
+    virtual bool run();
+
+    // The method to be run before thread loop (conditionally repeatedly)
+    // calls run()
+    virtual void prerun();
+
+    // The method to be run after thread loop (conditionally repeatedly)
+    // calls run()
+    inline virtual void postrun() {}
+};
+
+#endif //__MSG_TASK__
diff --git a/gps/utils/configure.ac b/gps/utils/configure.ac
new file mode 100644
index 0000000..a7ab9b4
--- /dev/null
+++ b/gps/utils/configure.ac
@@ -0,0 +1,59 @@
+# configure.ac -- Autoconf script for gps gps-utils
+#
+# Process this file with autoconf to produce a configure script
+
+# Requires autoconf tool later than 2.61
+AC_PREREQ(2.61)
+# Initialize the gps gps-utils package version 1.0.0
+AC_INIT([gps-utils],1.0.0)
+# Does not strictly follow GNU Coding standards
+AM_INIT_AUTOMAKE([foreign])
+# Disables auto rebuilding of configure, Makefile.ins
+AM_MAINTAINER_MODE
+# Verifies the --srcdir is correct by checking for the path
+AC_CONFIG_SRCDIR([Makefile.am])
+# defines some macros variable to be included by source
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_MACRO_DIR([m4])
+
+# Checks for programs.
+AC_PROG_LIBTOOL
+AC_PROG_CXX
+AC_PROG_CC
+AM_PROG_CC_C_O
+AC_PROG_AWK
+AC_PROG_CPP
+AC_PROG_INSTALL
+AC_PROG_LN_S
+AC_PROG_MAKE_SET
+PKG_PROG_PKG_CONFIG
+
+PKG_CHECK_MODULES([LOCPLA], [loc-pla])
+AC_SUBST([LOCPLA_CFLAGS])
+AC_SUBST([LOCPLA_LIBS])
+
+AC_ARG_WITH([glib],
+      AC_HELP_STRING([--with-glib],
+         [enable glib, building HLOS systems which use glib]))
+
+if (test "x${with_glib}" = "xyes"); then
+        AC_DEFINE(ENABLE_USEGLIB, 1, [Define if HLOS systems uses glib])
+        PKG_CHECK_MODULES(GTHREAD, gthread-2.0 >= 2.16, dummy=yes,
+                                AC_MSG_ERROR(GThread >= 2.16 is required))
+        PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.16, dummy=yes,
+                                AC_MSG_ERROR(GLib >= 2.16 is required))
+        GLIB_CFLAGS="$GLIB_CFLAGS $GTHREAD_CFLAGS"
+        GLIB_LIBS="$GLIB_LIBS $GTHREAD_LIBS"
+
+        AC_SUBST(GLIB_CFLAGS)
+        AC_SUBST(GLIB_LIBS)
+fi
+
+AM_CONDITIONAL(USE_GLIB, test "x${with_glib}" = "xyes")
+
+AC_CONFIG_FILES([ \
+        Makefile \
+        gps-utils.pc
+        ])
+
+AC_OUTPUT
diff --git a/gps/utils/gps-utils.pc.in b/gps/utils/gps-utils.pc.in
new file mode 100644
index 0000000..3ed3d90
--- /dev/null
+++ b/gps/utils/gps-utils.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: gps-utils
+Description: QTI GPS Location utils
+Version: @VERSION
+Libs: -L${libdir} -lgps_utils_so
+Cflags: -I${includedir}/gps-utils
diff --git a/gps/utils/gps_extended.h b/gps/utils/gps_extended.h
new file mode 100644
index 0000000..dc6ad1e
--- /dev/null
+++ b/gps/utils/gps_extended.h
@@ -0,0 +1,106 @@
+/* Copyright (c) 2013-2017 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef GPS_EXTENDED_H
+#define GPS_EXTENDED_H
+
+/**
+ * @file
+ * @brief C++ declarations for GPS types
+ */
+
+#include <gps_extended_c.h>
+#if defined(USE_GLIB) || defined(OFF_TARGET)
+#include <string.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+
+struct LocPosMode
+{
+    LocPositionMode mode;
+    LocGpsPositionRecurrence recurrence;
+    uint32_t min_interval;
+    uint32_t preferred_accuracy;
+    uint32_t preferred_time;
+    bool share_position;
+    char credentials[14];
+    char provider[8];
+    LocPosMode(LocPositionMode m, LocGpsPositionRecurrence recr,
+               uint32_t gap, uint32_t accu, uint32_t time,
+               bool sp, const char* cred, const char* prov) :
+        mode(m), recurrence(recr),
+        min_interval(gap < GPS_MIN_POSSIBLE_FIX_INTERVAL_MS ?
+                     GPS_MIN_POSSIBLE_FIX_INTERVAL_MS : gap),
+        preferred_accuracy(accu), preferred_time(time),
+        share_position(sp) {
+        memset(credentials, 0, sizeof(credentials));
+        memset(provider, 0, sizeof(provider));
+        if (NULL != cred) {
+            memcpy(credentials, cred, sizeof(credentials)-1);
+        }
+        if (NULL != prov) {
+            memcpy(provider, prov, sizeof(provider)-1);
+        }
+    }
+
+    inline LocPosMode() :
+        mode(LOC_POSITION_MODE_MS_BASED),
+        recurrence(LOC_GPS_POSITION_RECURRENCE_PERIODIC),
+        min_interval(GPS_DEFAULT_FIX_INTERVAL_MS),
+        preferred_accuracy(50), preferred_time(120000),
+        share_position(true) {
+        memset(credentials, 0, sizeof(credentials));
+        memset(provider, 0, sizeof(provider));
+    }
+
+    inline bool equals(const LocPosMode &anotherMode) const
+    {
+        return anotherMode.mode == mode &&
+            anotherMode.recurrence == recurrence &&
+            anotherMode.min_interval == min_interval &&
+            anotherMode.preferred_accuracy == preferred_accuracy &&
+            anotherMode.preferred_time == preferred_time &&
+            !strncmp(anotherMode.credentials, credentials, sizeof(credentials)-1) &&
+            !strncmp(anotherMode.provider, provider, sizeof(provider)-1);
+    }
+
+    void logv() const;
+};
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* GPS_EXTENDED_H */
+
diff --git a/gps/utils/gps_extended_c.h b/gps/utils/gps_extended_c.h
new file mode 100644
index 0000000..f87a942
--- /dev/null
+++ b/gps/utils/gps_extended_c.h
@@ -0,0 +1,1290 @@
+/* Copyright (c) 2013-2017 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef GPS_EXTENDED_C_H
+#define GPS_EXTENDED_C_H
+
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <loc_gps.h>
+#include <LocationAPI.h>
+#include <time.h>
+
+/**
+ * @file
+ * @brief C++ declarations for GPS types
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/** Location has valid source information. */
+#define LOCATION_HAS_SOURCE_INFO   0x0020
+/** LocGpsLocation has valid "is indoor?" flag */
+#define LOC_GPS_LOCATION_HAS_IS_INDOOR   0x0040
+/** LocGpsLocation has valid floor number */
+#define LOC_GPS_LOCATION_HAS_FLOOR_NUMBER   0x0080
+/** LocGpsLocation has valid map URL*/
+#define LOC_GPS_LOCATION_HAS_MAP_URL   0x0100
+/** LocGpsLocation has valid map index */
+#define LOC_GPS_LOCATION_HAS_MAP_INDEX   0x0200
+
+/** Sizes for indoor fields */
+#define GPS_LOCATION_MAP_URL_SIZE 400
+#define GPS_LOCATION_MAP_INDEX_SIZE 16
+
+/** Position source is ULP */
+#define ULP_LOCATION_IS_FROM_HYBRID   0x0001
+/** Position source is GNSS only */
+#define ULP_LOCATION_IS_FROM_GNSS     0x0002
+/** Position source is ZPP only */
+#define ULP_LOCATION_IS_FROM_ZPP      0x0004
+/** Position is from a Geofence Breach Event */
+#define ULP_LOCATION_IS_FROM_GEOFENCE 0X0008
+/** Position is from Hardware FLP */
+#define ULP_LOCATION_IS_FROM_HW_FLP   0x0010
+/** Position is from NLP */
+#define ULP_LOCATION_IS_FROM_NLP      0x0020
+/** Position is from PIP */
+#define ULP_LOCATION_IS_FROM_PIP      0x0040
+/** Position is from external DR solution*/
+#define ULP_LOCATION_IS_FROM_EXT_DR   0X0080
+/** Raw GNSS position fixes */
+#define ULP_LOCATION_IS_FROM_GNSS_RAW   0X0100
+
+typedef uint32_t LocSvInfoSource;
+/** SVinfo source is GNSS/DR */
+#define ULP_SVINFO_IS_FROM_GNSS       ((LocSvInfoSource)0x0001)
+/** Raw SVinfo from GNSS */
+#define ULP_SVINFO_IS_FROM_DR         ((LocSvInfoSource)0x0002)
+
+#define ULP_MIN_INTERVAL_INVALID 0xffffffff
+#define ULP_MAX_NMEA_STRING_SIZE 201
+
+/*Emergency SUPL*/
+#define LOC_GPS_NI_TYPE_EMERGENCY_SUPL    4
+
+#define LOC_AGPS_CERTIFICATE_MAX_LENGTH 2000
+#define LOC_AGPS_CERTIFICATE_MAX_SLOTS 10
+
+typedef uint32_t LocPosTechMask;
+#define LOC_POS_TECH_MASK_DEFAULT ((LocPosTechMask)0x00000000)
+#define LOC_POS_TECH_MASK_SATELLITE ((LocPosTechMask)0x00000001)
+#define LOC_POS_TECH_MASK_CELLID ((LocPosTechMask)0x00000002)
+#define LOC_POS_TECH_MASK_WIFI ((LocPosTechMask)0x00000004)
+#define LOC_POS_TECH_MASK_SENSORS ((LocPosTechMask)0x00000008)
+#define LOC_POS_TECH_MASK_REFERENCE_LOCATION ((LocPosTechMask)0x00000010)
+#define LOC_POS_TECH_MASK_INJECTED_COARSE_POSITION ((LocPosTechMask)0x00000020)
+#define LOC_POS_TECH_MASK_AFLT ((LocPosTechMask)0x00000040)
+#define LOC_POS_TECH_MASK_HYBRID ((LocPosTechMask)0x00000080)
+
+enum loc_registration_mask_status {
+    LOC_REGISTRATION_MASK_ENABLED,
+    LOC_REGISTRATION_MASK_DISABLED,
+    LOC_REGISTRATION_MASK_SET
+};
+
+typedef enum {
+    LOC_SUPPORTED_FEATURE_ODCPI_2_V02 = 0, /**<  Support ODCPI version 2 feature  */
+    LOC_SUPPORTED_FEATURE_WIFI_AP_DATA_INJECT_2_V02, /**<  Support Wifi AP data inject version 2 feature  */
+    LOC_SUPPORTED_FEATURE_DEBUG_NMEA_V02 /**< Support debug NMEA feature */
+} loc_supported_feature_enum;
+
+typedef struct {
+    /** set to sizeof(UlpLocation) */
+    size_t          size;
+    LocGpsLocation     gpsLocation;
+    /* Provider indicator for HYBRID or GPS */
+    uint16_t        position_source;
+    LocPosTechMask  tech_mask;
+    /*allows HAL to pass additional information related to the location */
+    int             rawDataSize;         /* in # of bytes */
+    void            * rawData;
+    bool            is_indoor;
+    float           floor_number;
+    char            map_url[GPS_LOCATION_MAP_URL_SIZE];
+    unsigned char   map_index[GPS_LOCATION_MAP_INDEX_SIZE];
+} UlpLocation;
+
+typedef struct {
+    /** set to sizeof(UlpNmea) */
+    size_t          size;
+    char            nmea_str[ULP_MAX_NMEA_STRING_SIZE];
+    unsigned int    len;
+} UlpNmea;
+
+
+/** AGPS type */
+typedef int8_t AGpsExtType;
+#define LOC_AGPS_TYPE_INVALID       -1
+#define LOC_AGPS_TYPE_ANY           0
+#define LOC_AGPS_TYPE_SUPL          1
+#define LOC_AGPS_TYPE_C2K           2
+#define LOC_AGPS_TYPE_WWAN_ANY      3
+#define LOC_AGPS_TYPE_WIFI          4
+#define LOC_AGPS_TYPE_SUPL_ES       5
+
+/** SSID length */
+#define SSID_BUF_SIZE (32+1)
+
+typedef int16_t AGpsBearerType;
+#define AGPS_APN_BEARER_INVALID     0
+#define AGPS_APN_BEARER_IPV4        1
+#define AGPS_APN_BEARER_IPV6        2
+#define AGPS_APN_BEARER_IPV4V6      3
+
+typedef enum {
+    AGPS_CB_PRIORITY_LOW  = 1,
+    AGPS_CB_PRIORITY_MED  = 2,
+    AGPS_CB_PRIORITY_HIGH = 3
+} AgpsCbPriority;
+
+typedef struct {
+    void* statusV4Cb;
+    AgpsCbPriority cbPriority;
+} AgpsCbInfo;
+
+/** GPS extended callback structure. */
+typedef struct {
+    /** set to sizeof(LocGpsCallbacks) */
+    size_t      size;
+    loc_gps_set_capabilities set_capabilities_cb;
+    loc_gps_acquire_wakelock acquire_wakelock_cb;
+    loc_gps_release_wakelock release_wakelock_cb;
+    loc_gps_create_thread create_thread_cb;
+    loc_gps_request_utc_time request_utc_time_cb;
+} GpsExtCallbacks;
+
+/** Callback to report the xtra server url to the client.
+ *  The client should use this url when downloading xtra unless overwritten
+ *  in the gps.conf file
+ */
+typedef void (* report_xtra_server)(const char*, const char*, const char*);
+
+/** Callback structure for the XTRA interface. */
+typedef struct {
+    loc_gps_xtra_download_request download_request_cb;
+    loc_gps_create_thread create_thread_cb;
+    report_xtra_server report_xtra_server_cb;
+} GpsXtraExtCallbacks;
+
+/** Represents the status of AGPS. */
+typedef struct {
+    /** set to sizeof(AGpsExtStatus) */
+    size_t          size;
+
+    AGpsExtType type;
+    LocAGpsStatusValue status;
+    uint32_t        ipv4_addr;
+    struct sockaddr_storage addr;
+    char            ssid[SSID_BUF_SIZE];
+    char            password[SSID_BUF_SIZE];
+} AGpsExtStatus;
+
+/** Callback with AGPS status information.
+ *  Can only be called from a thread created by create_thread_cb.
+ */
+typedef void (* agps_status_extended)(AGpsExtStatus* status);
+
+/** Callback structure for the AGPS interface. */
+typedef struct {
+    agps_status_extended status_cb;
+    loc_gps_create_thread create_thread_cb;
+} AGpsExtCallbacks;
+
+
+typedef void (*loc_ni_notify_callback)(LocGpsNiNotification *notification, bool esEnalbed);
+/** GPS NI callback structure. */
+typedef struct
+{
+    /**
+     * Sends the notification request from HAL to GPSLocationProvider.
+     */
+    loc_ni_notify_callback notify_cb;
+} GpsNiExtCallbacks;
+
+typedef enum loc_server_type {
+    LOC_AGPS_CDMA_PDE_SERVER,
+    LOC_AGPS_CUSTOM_PDE_SERVER,
+    LOC_AGPS_MPC_SERVER,
+    LOC_AGPS_SUPL_SERVER
+} LocServerType;
+
+typedef enum loc_position_mode_type {
+    LOC_POSITION_MODE_INVALID = -1,
+    LOC_POSITION_MODE_STANDALONE = 0,
+    LOC_POSITION_MODE_MS_BASED,
+    LOC_POSITION_MODE_MS_ASSISTED,
+    LOC_POSITION_MODE_RESERVED_1,
+    LOC_POSITION_MODE_RESERVED_2,
+    LOC_POSITION_MODE_RESERVED_3,
+    LOC_POSITION_MODE_RESERVED_4,
+    LOC_POSITION_MODE_RESERVED_5
+
+} LocPositionMode;
+
+/**
+ * @brief Minimum allowed value for fix interval.
+ *
+ * This value is a sanity limit in GPS framework. The hardware has own internal
+ * limits that may not match this value
+ *
+ * @sa GPS_DEFAULT_FIX_INTERVAL_MS
+ */
+
+#define GPS_MIN_POSSIBLE_FIX_INTERVAL_MS 100
+/**
+ * @brief Default value for fix interval.
+ *
+ * This value is used by default whenever appropriate.
+ *
+ * @sa GPS_MIN_POSSIBLE_FIX_INTERVAL_MS
+ */
+#define GPS_DEFAULT_FIX_INTERVAL_MS      1000
+
+/** Flags to indicate which values are valid in a GpsLocationExtended. */
+typedef uint32_t GpsLocationExtendedFlags;
+/** GpsLocationExtended has valid pdop, hdop, vdop. */
+#define GPS_LOCATION_EXTENDED_HAS_DOP 0x0001
+/** GpsLocationExtended has valid altitude mean sea level. */
+#define GPS_LOCATION_EXTENDED_HAS_ALTITUDE_MEAN_SEA_LEVEL 0x0002
+/** UlpLocation has valid magnetic deviation. */
+#define GPS_LOCATION_EXTENDED_HAS_MAG_DEV 0x0004
+/** UlpLocation has valid mode indicator. */
+#define GPS_LOCATION_EXTENDED_HAS_MODE_IND 0x0008
+/** GpsLocationExtended has valid vertical uncertainty */
+#define GPS_LOCATION_EXTENDED_HAS_VERT_UNC 0x0010
+/** GpsLocationExtended has valid speed uncertainty */
+#define GPS_LOCATION_EXTENDED_HAS_SPEED_UNC 0x0020
+/** GpsLocationExtended has valid heading uncertainty */
+#define GPS_LOCATION_EXTENDED_HAS_BEARING_UNC 0x0040
+/** GpsLocationExtended has valid horizontal reliability */
+#define GPS_LOCATION_EXTENDED_HAS_HOR_RELIABILITY 0x0080
+/** GpsLocationExtended has valid vertical reliability */
+#define GPS_LOCATION_EXTENDED_HAS_VERT_RELIABILITY 0x0100
+/** GpsLocationExtended has valid Horizontal Elliptical Uncertainty (Semi-Major Axis) */
+#define GPS_LOCATION_EXTENDED_HAS_HOR_ELIP_UNC_MAJOR 0x0200
+/** GpsLocationExtended has valid Horizontal Elliptical Uncertainty (Semi-Minor Axis) */
+#define GPS_LOCATION_EXTENDED_HAS_HOR_ELIP_UNC_MINOR 0x0400
+/** GpsLocationExtended has valid Elliptical Horizontal Uncertainty Azimuth */
+#define GPS_LOCATION_EXTENDED_HAS_HOR_ELIP_UNC_AZIMUTH 0x0800
+/** GpsLocationExtended has valid gnss sv used in position data */
+#define GPS_LOCATION_EXTENDED_HAS_GNSS_SV_USED_DATA 0x1000
+/** GpsLocationExtended has valid navSolutionMask */
+#define GPS_LOCATION_EXTENDED_HAS_NAV_SOLUTION_MASK 0x2000
+/** GpsLocationExtended has valid LocPosTechMask */
+#define GPS_LOCATION_EXTENDED_HAS_POS_TECH_MASK   0x4000
+/** GpsLocationExtended has valid LocSvInfoSource */
+#define GPS_LOCATION_EXTENDED_HAS_SV_SOURCE_INFO   0x8000
+/** GpsLocationExtended has valid position dynamics data */
+#define GPS_LOCATION_EXTENDED_HAS_POS_DYNAMICS_DATA   0x10000
+/** GpsLocationExtended has GPS Time */
+#define GPS_LOCATION_EXTENDED_HAS_GPS_TIME   0x20000
+
+typedef uint32_t LocNavSolutionMask;
+/* Bitmask to specify whether SBAS ionospheric correction is used  */
+#define LOC_NAV_MASK_SBAS_CORRECTION_IONO ((LocNavSolutionMask)0x0001)
+/* Bitmask to specify whether SBAS fast correction is used  */
+#define LOC_NAV_MASK_SBAS_CORRECTION_FAST ((LocNavSolutionMask)0x0002)
+/**<  Bitmask to specify whether SBAS long-tem correction is used  */
+#define LOC_NAV_MASK_SBAS_CORRECTION_LONG ((LocNavSolutionMask)0x0004)
+/**<  Bitmask to specify whether SBAS integrity information is used  */
+#define LOC_NAV_MASK_SBAS_INTEGRITY ((LocNavSolutionMask)0x0008)
+
+typedef uint32_t LocPosDataMask;
+/* Bitmask to specify whether Navigation data has Forward Acceleration  */
+#define LOC_NAV_DATA_HAS_LONG_ACCEL ((LocPosDataMask)0x0001)
+/* Bitmask to specify whether Navigation data has Sideward Acceleration */
+#define LOC_NAV_DATA_HAS_LAT_ACCEL ((LocPosDataMask)0x0002)
+/* Bitmask to specify whether Navigation data has Vertical Acceleration */
+#define LOC_NAV_DATA_HAS_VERT_ACCEL ((LocPosDataMask)0x0004)
+/* Bitmask to specify whether Navigation data has Heading Rate */
+#define LOC_NAV_DATA_HAS_YAW_RATE ((LocPosDataMask)0x0008)
+/* Bitmask to specify whether Navigation data has Body pitch */
+#define LOC_NAV_DATA_HAS_PITCH ((LocPosDataMask)0x0010)
+
+/** GPS PRN Range */
+#define GPS_SV_PRN_MIN      1
+#define GPS_SV_PRN_MAX      32
+#define GLO_SV_PRN_MIN      65
+#define GLO_SV_PRN_MAX      96
+#define QZSS_SV_PRN_MIN     193
+#define QZSS_SV_PRN_MAX     197
+#define BDS_SV_PRN_MIN      201
+#define BDS_SV_PRN_MAX      235
+#define GAL_SV_PRN_MIN      301
+#define GAL_SV_PRN_MAX      336
+
+typedef uint32_t LocPosTechMask;
+#define LOC_POS_TECH_MASK_DEFAULT ((LocPosTechMask)0x00000000)
+#define LOC_POS_TECH_MASK_SATELLITE ((LocPosTechMask)0x00000001)
+#define LOC_POS_TECH_MASK_CELLID ((LocPosTechMask)0x00000002)
+#define LOC_POS_TECH_MASK_WIFI ((LocPosTechMask)0x00000004)
+#define LOC_POS_TECH_MASK_SENSORS ((LocPosTechMask)0x00000008)
+#define LOC_POS_TECH_MASK_REFERENCE_LOCATION ((LocPosTechMask)0x00000010)
+#define LOC_POS_TECH_MASK_INJECTED_COARSE_POSITION ((LocPosTechMask)0x00000020)
+#define LOC_POS_TECH_MASK_AFLT ((LocPosTechMask)0x00000040)
+#define LOC_POS_TECH_MASK_HYBRID ((LocPosTechMask)0x00000080)
+
+typedef enum {
+    LOC_RELIABILITY_NOT_SET = 0,
+    LOC_RELIABILITY_VERY_LOW = 1,
+    LOC_RELIABILITY_LOW = 2,
+    LOC_RELIABILITY_MEDIUM = 3,
+    LOC_RELIABILITY_HIGH = 4
+}LocReliability;
+
+typedef struct {
+    struct timespec apTimeStamp;
+    /*boottime received from pps-ktimer*/
+    float apTimeStampUncertaintyMs;
+    /* timestamp uncertainty in milli seconds */
+}Gnss_ApTimeStampStructType;
+
+typedef struct {
+    uint64_t gps_sv_used_ids_mask;
+    uint64_t glo_sv_used_ids_mask;
+    uint64_t gal_sv_used_ids_mask;
+    uint64_t bds_sv_used_ids_mask;
+    uint64_t qzss_sv_used_ids_mask;
+} GnssSvUsedInPosition;
+
+/* Body Frame parameters */
+typedef struct {
+    /** Contains Body frame LocPosDataMask bits. */
+   uint32_t        bodyFrameDatamask;
+   /* Forward Acceleration in body frame (m/s2)*/
+   float           longAccel;
+   /* Sideward Acceleration in body frame (m/s2)*/
+   float           latAccel;
+   /* Vertical Acceleration in body frame (m/s2)*/
+   float           vertAccel;
+   /* Heading Rate (Radians/second) */
+   float           yawRate;
+   /* Body pitch (Radians) */
+   float           pitch;
+}LocPositionDynamics;
+
+/* GPS Time structure */
+typedef struct {
+
+  /**<   Current GPS week as calculated from midnight, Jan. 6, 1980. \n
+       - Units: Weeks */
+  uint16_t gpsWeek;
+
+  /**<   Amount of time into the current GPS week. \n
+       - Units: Milliseconds */
+  uint32_t gpsTimeOfWeekMs;
+}GPSTimeStruct;
+
+/** Represents gps location extended. */
+typedef struct {
+    /** set to sizeof(GpsLocationExtended) */
+    size_t          size;
+    /** Contains GpsLocationExtendedFlags bits. */
+    uint32_t        flags;
+    /** Contains the Altitude wrt mean sea level */
+    float           altitudeMeanSeaLevel;
+    /** Contains Position Dilusion of Precision. */
+    float           pdop;
+    /** Contains Horizontal Dilusion of Precision. */
+    float           hdop;
+    /** Contains Vertical Dilusion of Precision. */
+    float           vdop;
+    /** Contains Magnetic Deviation. */
+    float           magneticDeviation;
+    /** vertical uncertainty in meters */
+    float           vert_unc;
+    /** speed uncertainty in m/s */
+    float           speed_unc;
+    /** heading uncertainty in degrees (0 to 359.999) */
+    float           bearing_unc;
+    /** horizontal reliability. */
+    LocReliability  horizontal_reliability;
+    /** vertical reliability. */
+    LocReliability  vertical_reliability;
+    /*  Horizontal Elliptical Uncertainty (Semi-Major Axis) */
+    float           horUncEllipseSemiMajor;
+    /*  Horizontal Elliptical Uncertainty (Semi-Minor Axis) */
+    float           horUncEllipseSemiMinor;
+    /*    Elliptical Horizontal Uncertainty Azimuth */
+    float           horUncEllipseOrientAzimuth;
+
+    Gnss_ApTimeStampStructType               timeStamp;
+    /** Gnss sv used in position data */
+    GnssSvUsedInPosition gnss_sv_used_ids;
+    /** Nav solution mask to indicate sbas corrections */
+    LocNavSolutionMask  navSolutionMask;
+    /** Position technology used in computing this fix */
+    LocPosTechMask tech_mask;
+    /** SV Info source used in computing this fix */
+    LocSvInfoSource sv_source;
+    /** Body Frame Dynamics: 4wayAcceleration and pitch set with validity */
+    LocPositionDynamics bodyFrameData;
+    /** GPS Time */
+    GPSTimeStruct gpsTime;
+} GpsLocationExtended;
+
+enum loc_sess_status {
+    LOC_SESS_SUCCESS,
+    LOC_SESS_INTERMEDIATE,
+    LOC_SESS_FAILURE
+};
+
+// Nmea sentence types mask
+typedef uint32_t NmeaSentenceTypesMask;
+#define LOC_NMEA_MASK_GGA_V02   ((NmeaSentenceTypesMask)0x00000001) /**<  Enable GGA type  */
+#define LOC_NMEA_MASK_RMC_V02   ((NmeaSentenceTypesMask)0x00000002) /**<  Enable RMC type  */
+#define LOC_NMEA_MASK_GSV_V02   ((NmeaSentenceTypesMask)0x00000004) /**<  Enable GSV type  */
+#define LOC_NMEA_MASK_GSA_V02   ((NmeaSentenceTypesMask)0x00000008) /**<  Enable GSA type  */
+#define LOC_NMEA_MASK_VTG_V02   ((NmeaSentenceTypesMask)0x00000010) /**<  Enable VTG type  */
+#define LOC_NMEA_MASK_PQXFI_V02 ((NmeaSentenceTypesMask)0x00000020) /**<  Enable PQXFI type  */
+#define LOC_NMEA_MASK_PSTIS_V02 ((NmeaSentenceTypesMask)0x00000040) /**<  Enable PSTIS type  */
+#define LOC_NMEA_MASK_GLGSV_V02 ((NmeaSentenceTypesMask)0x00000080) /**<  Enable GLGSV type  */
+#define LOC_NMEA_MASK_GNGSA_V02 ((NmeaSentenceTypesMask)0x00000100) /**<  Enable GNGSA type  */
+#define LOC_NMEA_MASK_GNGNS_V02 ((NmeaSentenceTypesMask)0x00000200) /**<  Enable GNGNS type  */
+#define LOC_NMEA_MASK_GARMC_V02 ((NmeaSentenceTypesMask)0x00000400) /**<  Enable GARMC type  */
+#define LOC_NMEA_MASK_GAGSV_V02 ((NmeaSentenceTypesMask)0x00000800) /**<  Enable GAGSV type  */
+#define LOC_NMEA_MASK_GAGSA_V02 ((NmeaSentenceTypesMask)0x00001000) /**<  Enable GAGSA type  */
+#define LOC_NMEA_MASK_GAVTG_V02 ((NmeaSentenceTypesMask)0x00002000) /**<  Enable GAVTG type  */
+#define LOC_NMEA_MASK_GAGGA_V02 ((NmeaSentenceTypesMask)0x00004000) /**<  Enable GAGGA type  */
+#define LOC_NMEA_MASK_PQGSA_V02 ((NmeaSentenceTypesMask)0x00008000) /**<  Enable PQGSA type  */
+#define LOC_NMEA_MASK_PQGSV_V02 ((NmeaSentenceTypesMask)0x00010000) /**<  Enable PQGSV type  */
+#define LOC_NMEA_MASK_DEBUG_V02 ((NmeaSentenceTypesMask)0x00020000) /**<  Enable DEBUG type  */
+
+// all bitmasks of general supported NMEA sentenses - debug is not part of this
+#define LOC_NMEA_ALL_GENERAL_SUPPORTED_MASK  (LOC_NMEA_MASK_GGA_V02 | LOC_NMEA_MASK_RMC_V02 | \
+              LOC_NMEA_MASK_GSV_V02 | LOC_NMEA_MASK_GSA_V02 | LOC_NMEA_MASK_VTG_V02 | \
+        LOC_NMEA_MASK_PQXFI_V02 | LOC_NMEA_MASK_PSTIS_V02 | LOC_NMEA_MASK_GLGSV_V02 | \
+        LOC_NMEA_MASK_GNGSA_V02 | LOC_NMEA_MASK_GNGNS_V02 | LOC_NMEA_MASK_GARMC_V02 | \
+        LOC_NMEA_MASK_GAGSV_V02 | LOC_NMEA_MASK_GAGSA_V02 | LOC_NMEA_MASK_GAVTG_V02 | \
+        LOC_NMEA_MASK_GAGGA_V02 | LOC_NMEA_MASK_PQGSA_V02 | LOC_NMEA_MASK_PQGSV_V02)
+
+typedef enum {
+  LOC_ENG_IF_REQUEST_SENDER_ID_QUIPC = 0,
+  LOC_ENG_IF_REQUEST_SENDER_ID_MSAPM,
+  LOC_ENG_IF_REQUEST_SENDER_ID_MSAPU,
+  LOC_ENG_IF_REQUEST_SENDER_ID_GPSONE_DAEMON,
+  LOC_ENG_IF_REQUEST_SENDER_ID_MODEM,
+  LOC_ENG_IF_REQUEST_SENDER_ID_UNKNOWN
+} loc_if_req_sender_id_e_type;
+
+
+#define smaller_of(a, b) (((a) > (b)) ? (b) : (a))
+#define MAX_APN_LEN 100
+
+// This will be overridden by the individual adapters
+// if necessary.
+#define DEFAULT_IMPL(rtv)                                     \
+{                                                             \
+    LOC_LOGD("%s: default implementation invoked", __func__); \
+    return rtv;                                               \
+}
+
+enum loc_api_adapter_err {
+    LOC_API_ADAPTER_ERR_SUCCESS             = 0,
+    LOC_API_ADAPTER_ERR_GENERAL_FAILURE     = 1,
+    LOC_API_ADAPTER_ERR_UNSUPPORTED         = 2,
+    LOC_API_ADAPTER_ERR_INVALID_HANDLE      = 4,
+    LOC_API_ADAPTER_ERR_INVALID_PARAMETER   = 5,
+    LOC_API_ADAPTER_ERR_ENGINE_BUSY         = 6,
+    LOC_API_ADAPTER_ERR_PHONE_OFFLINE       = 7,
+    LOC_API_ADAPTER_ERR_TIMEOUT             = 8,
+    LOC_API_ADAPTER_ERR_SERVICE_NOT_PRESENT = 9,
+    LOC_API_ADAPTER_ERR_INTERNAL            = 10,
+
+    /* equating engine down to phone offline, as they are the same errror */
+    LOC_API_ADAPTER_ERR_ENGINE_DOWN         = LOC_API_ADAPTER_ERR_PHONE_OFFLINE,
+    LOC_API_ADAPTER_ERR_FAILURE             = 101,
+    LOC_API_ADAPTER_ERR_UNKNOWN
+};
+
+enum loc_api_adapter_event_index {
+    LOC_API_ADAPTER_REPORT_POSITION = 0,               // Position report comes in loc_parsed_position_s_type
+    LOC_API_ADAPTER_REPORT_SATELLITE,                  // Satellite in view report
+    LOC_API_ADAPTER_REPORT_NMEA_1HZ,                   // NMEA report at 1HZ rate
+    LOC_API_ADAPTER_REPORT_NMEA_POSITION,              // NMEA report at position report rate
+    LOC_API_ADAPTER_REQUEST_NI_NOTIFY_VERIFY,          // NI notification/verification request
+    LOC_API_ADAPTER_REQUEST_ASSISTANCE_DATA,           // Assistance data, eg: time, predicted orbits request
+    LOC_API_ADAPTER_REQUEST_LOCATION_SERVER,           // Request for location server
+    LOC_API_ADAPTER_REPORT_IOCTL,                      // Callback report for loc_ioctl
+    LOC_API_ADAPTER_REPORT_STATUS,                     // Misc status report: eg, engine state
+    LOC_API_ADAPTER_REQUEST_WIFI,                      //
+    LOC_API_ADAPTER_SENSOR_STATUS,                     //
+    LOC_API_ADAPTER_REQUEST_TIME_SYNC,                 //
+    LOC_API_ADAPTER_REPORT_SPI,                        //
+    LOC_API_ADAPTER_REPORT_NI_GEOFENCE,                //
+    LOC_API_ADAPTER_GEOFENCE_GEN_ALERT,                //
+    LOC_API_ADAPTER_REPORT_GENFENCE_BREACH,            //
+    LOC_API_ADAPTER_PEDOMETER_CTRL,                    //
+    LOC_API_ADAPTER_MOTION_CTRL,                       //
+    LOC_API_ADAPTER_REQUEST_WIFI_AP_DATA,              // Wifi ap data
+    LOC_API_ADAPTER_BATCH_FULL,                        // Batching on full
+    LOC_API_ADAPTER_BATCHED_POSITION_REPORT,           // Batching on fix
+    LOC_API_ADAPTER_BATCHED_GENFENCE_BREACH_REPORT,    //
+    LOC_API_ADAPTER_GNSS_MEASUREMENT_REPORT,          //GNSS Measurement Report
+    LOC_API_ADAPTER_GNSS_SV_POLYNOMIAL_REPORT,        //GNSS SV Polynomial Report
+    LOC_API_ADAPTER_GDT_UPLOAD_BEGIN_REQ,              // GDT upload start request
+    LOC_API_ADAPTER_GDT_UPLOAD_END_REQ,                // GDT upload end request
+    LOC_API_ADAPTER_GNSS_MEASUREMENT,                  // GNSS Measurement report
+    LOC_API_ADAPTER_REQUEST_TIMEZONE,                  // Timezone injection request
+    LOC_API_ADAPTER_REPORT_GENFENCE_DWELL_REPORT,      // Geofence dwell report
+    LOC_API_ADAPTER_REQUEST_SRN_DATA,                  // request srn data from AP
+    LOC_API_ADAPTER_REQUEST_POSITION_INJECTION,        // Position injection request
+    LOC_API_ADAPTER_BATCH_STATUS,                       // batch status
+    LOC_API_ADAPTER_EVENT_MAX
+};
+
+#define LOC_API_ADAPTER_BIT_PARSED_POSITION_REPORT           (1<<LOC_API_ADAPTER_REPORT_POSITION)
+#define LOC_API_ADAPTER_BIT_SATELLITE_REPORT                 (1<<LOC_API_ADAPTER_REPORT_SATELLITE)
+#define LOC_API_ADAPTER_BIT_NMEA_1HZ_REPORT                  (1<<LOC_API_ADAPTER_REPORT_NMEA_1HZ)
+#define LOC_API_ADAPTER_BIT_NMEA_POSITION_REPORT             (1<<LOC_API_ADAPTER_REPORT_NMEA_POSITION)
+#define LOC_API_ADAPTER_BIT_NI_NOTIFY_VERIFY_REQUEST         (1<<LOC_API_ADAPTER_REQUEST_NI_NOTIFY_VERIFY)
+#define LOC_API_ADAPTER_BIT_ASSISTANCE_DATA_REQUEST          (1<<LOC_API_ADAPTER_REQUEST_ASSISTANCE_DATA)
+#define LOC_API_ADAPTER_BIT_LOCATION_SERVER_REQUEST          (1<<LOC_API_ADAPTER_REQUEST_LOCATION_SERVER)
+#define LOC_API_ADAPTER_BIT_IOCTL_REPORT                     (1<<LOC_API_ADAPTER_REPORT_IOCTL)
+#define LOC_API_ADAPTER_BIT_STATUS_REPORT                    (1<<LOC_API_ADAPTER_REPORT_STATUS)
+#define LOC_API_ADAPTER_BIT_REQUEST_WIFI                     (1<<LOC_API_ADAPTER_REQUEST_WIFI)
+#define LOC_API_ADAPTER_BIT_SENSOR_STATUS                    (1<<LOC_API_ADAPTER_SENSOR_STATUS)
+#define LOC_API_ADAPTER_BIT_REQUEST_TIME_SYNC                (1<<LOC_API_ADAPTER_REQUEST_TIME_SYNC)
+#define LOC_API_ADAPTER_BIT_REPORT_SPI                       (1<<LOC_API_ADAPTER_REPORT_SPI)
+#define LOC_API_ADAPTER_BIT_REPORT_NI_GEOFENCE               (1<<LOC_API_ADAPTER_REPORT_NI_GEOFENCE)
+#define LOC_API_ADAPTER_BIT_GEOFENCE_GEN_ALERT               (1<<LOC_API_ADAPTER_GEOFENCE_GEN_ALERT)
+#define LOC_API_ADAPTER_BIT_REPORT_GENFENCE_BREACH           (1<<LOC_API_ADAPTER_REPORT_GENFENCE_BREACH)
+#define LOC_API_ADAPTER_BIT_BATCHED_GENFENCE_BREACH_REPORT   (1<<LOC_API_ADAPTER_BATCHED_GENFENCE_BREACH_REPORT)
+#define LOC_API_ADAPTER_BIT_PEDOMETER_CTRL                   (1<<LOC_API_ADAPTER_PEDOMETER_CTRL)
+#define LOC_API_ADAPTER_BIT_MOTION_CTRL                      (1<<LOC_API_ADAPTER_MOTION_CTRL)
+#define LOC_API_ADAPTER_BIT_REQUEST_WIFI_AP_DATA             (1<<LOC_API_ADAPTER_REQUEST_WIFI_AP_DATA)
+#define LOC_API_ADAPTER_BIT_BATCH_FULL                       (1<<LOC_API_ADAPTER_BATCH_FULL)
+#define LOC_API_ADAPTER_BIT_BATCHED_POSITION_REPORT          (1<<LOC_API_ADAPTER_BATCHED_POSITION_REPORT)
+#define LOC_API_ADAPTER_BIT_GNSS_MEASUREMENT_REPORT          (1<<LOC_API_ADAPTER_GNSS_MEASUREMENT_REPORT)
+#define LOC_API_ADAPTER_BIT_GNSS_SV_POLYNOMIAL_REPORT        (1<<LOC_API_ADAPTER_GNSS_SV_POLYNOMIAL_REPORT)
+#define LOC_API_ADAPTER_BIT_GDT_UPLOAD_BEGIN_REQ             (1<<LOC_API_ADAPTER_GDT_UPLOAD_BEGIN_REQ)
+#define LOC_API_ADAPTER_BIT_GDT_UPLOAD_END_REQ               (1<<LOC_API_ADAPTER_GDT_UPLOAD_END_REQ)
+#define LOC_API_ADAPTER_BIT_GNSS_MEASUREMENT                 (1<<LOC_API_ADAPTER_GNSS_MEASUREMENT)
+#define LOC_API_ADAPTER_BIT_REQUEST_TIMEZONE                 (1<<LOC_API_ADAPTER_REQUEST_TIMEZONE)
+#define LOC_API_ADAPTER_BIT_REPORT_GENFENCE_DWELL            (1<<LOC_API_ADAPTER_REPORT_GENFENCE_DWELL_REPORT)
+#define LOC_API_ADAPTER_BIT_REQUEST_SRN_DATA                 (1<<LOC_API_ADAPTER_REQUEST_SRN_DATA)
+#define LOC_API_ADAPTER_BIT_POSITION_INJECTION_REQUEST       (1<<LOC_API_ADAPTER_REQUEST_POSITION_INJECTION)
+#define LOC_API_ADAPTER_BIT_BATCH_STATUS                     (1<<LOC_API_ADAPTER_BATCH_STATUS)
+
+
+typedef unsigned int LOC_API_ADAPTER_EVENT_MASK_T;
+
+typedef enum loc_api_adapter_msg_to_check_supported {
+    LOC_API_ADAPTER_MESSAGE_LOCATION_BATCHING,               // Batching 1.0
+    LOC_API_ADAPTER_MESSAGE_BATCHED_GENFENCE_BREACH,         // Geofence Batched Breach
+    LOC_API_ADAPTER_MESSAGE_DISTANCE_BASE_TRACKING,          // DBT 2.0
+    LOC_API_ADAPTER_MESSAGE_ADAPTIVE_LOCATION_BATCHING,      // Batching 1.5
+    LOC_API_ADAPTER_MESSAGE_DISTANCE_BASE_LOCATION_BATCHING, // Batching 2.0
+    LOC_API_ADAPTER_MESSAGE_UPDATE_TBF_ON_THE_FLY,           // Updating Tracking TBF On The Fly
+    LOC_API_ADAPTER_MESSAGE_OUTDOOR_TRIP_BATCHING,           // Outdoor Trip Batching
+
+    LOC_API_ADAPTER_MESSAGE_MAX
+} LocCheckingMessagesID;
+
+typedef int IzatDevId_t;
+
+typedef uint32_t LOC_GPS_LOCK_MASK;
+#define isGpsLockNone(lock) ((lock) == 0)
+#define isGpsLockMO(lock) ((lock) & ((LOC_GPS_LOCK_MASK)1))
+#define isGpsLockMT(lock) ((lock) & ((LOC_GPS_LOCK_MASK)2))
+#define isGpsLockAll(lock) (((lock) & ((LOC_GPS_LOCK_MASK)3)) == 3)
+
+/*++ ***********************************************
+**  Satellite Measurement and Satellite Polynomial
+**  Structure definitions
+**  ***********************************************
+--*/
+#define GNSS_SV_POLY_VELOCITY_COEF_MAX_SIZE         12
+#define GNSS_SV_POLY_XYZ_0_TH_ORDER_COEFF_MAX_SIZE  3
+#define GNSS_SV_POLY_XYZ_N_TH_ORDER_COEFF_MAX_SIZE  9
+#define GNSS_SV_POLY_SV_CLKBIAS_COEFF_MAX_SIZE      4
+#define GNSS_LOC_SV_MEAS_LIST_MAX_SIZE              16
+
+enum ulp_gnss_sv_measurement_valid_flags{
+
+    ULP_GNSS_SV_MEAS_GPS_TIME = 0,
+    ULP_GNSS_SV_MEAS_PSUEDO_RANGE,
+    ULP_GNSS_SV_MEAS_MS_IN_WEEK,
+    ULP_GNSS_SV_MEAS_SUB_MSEC,
+    ULP_GNSS_SV_MEAS_CARRIER_PHASE,
+    ULP_GNSS_SV_MEAS_DOPPLER_SHIFT,
+    ULP_GNSS_SV_MEAS_CNO,
+    ULP_GNSS_SV_MEAS_LOSS_OF_LOCK,
+
+    ULP_GNSS_SV_MEAS_MAX_VALID_FLAGS
+};
+
+#define ULP_GNSS_SV_MEAS_BIT_GPS_TIME        (1<<ULP_GNSS_SV_MEAS_GPS_TIME)
+#define ULP_GNSS_SV_MEAS_BIT_PSUEDO_RANGE    (1<<ULP_GNSS_SV_MEAS_PSUEDO_RANGE)
+#define ULP_GNSS_SV_MEAS_BIT_MS_IN_WEEK      (1<<ULP_GNSS_SV_MEAS_MS_IN_WEEK)
+#define ULP_GNSS_SV_MEAS_BIT_SUB_MSEC        (1<<ULP_GNSS_SV_MEAS_SUB_MSEC)
+#define ULP_GNSS_SV_MEAS_BIT_CARRIER_PHASE   (1<<ULP_GNSS_SV_MEAS_CARRIER_PHASE)
+#define ULP_GNSS_SV_MEAS_BIT_DOPPLER_SHIFT   (1<<ULP_GNSS_SV_MEAS_DOPPLER_SHIFT)
+#define ULP_GNSS_SV_MEAS_BIT_CNO             (1<<ULP_GNSS_SV_MEAS_CNO)
+#define ULP_GNSS_SV_MEAS_BIT_LOSS_OF_LOCK    (1<<ULP_GNSS_SV_MEAS_LOSS_OF_LOCK)
+
+enum ulp_gnss_sv_poly_valid_flags{
+
+    ULP_GNSS_SV_POLY_GLO_FREQ = 0,
+    ULP_GNSS_SV_POLY_T0,
+    ULP_GNSS_SV_POLY_IODE,
+    ULP_GNSS_SV_POLY_FLAG,
+    ULP_GNSS_SV_POLY_POLYCOEFF_XYZ0,
+    ULP_GNSS_SV_POLY_POLYCOEFF_XYZN,
+    ULP_GNSS_SV_POLY_POLYCOEFF_OTHER,
+    ULP_GNSS_SV_POLY_SV_POSUNC,
+    ULP_GNSS_SV_POLY_IONODELAY,
+    ULP_GNSS_SV_POLY_IONODOT,
+    ULP_GNSS_SV_POLY_SBAS_IONODELAY,
+    ULP_GNSS_SV_POLY_SBAS_IONODOT,
+    ULP_GNSS_SV_POLY_TROPODELAY,
+    ULP_GNSS_SV_POLY_ELEVATION,
+    ULP_GNSS_SV_POLY_ELEVATIONDOT,
+    ULP_GNSS_SV_POLY_ELEVATIONUNC,
+    ULP_GNSS_SV_POLY_VELO_COEFF,
+    ULP_GNSS_SV_POLY_ENHANCED_IOD,
+
+    ULP_GNSS_SV_POLY_VALID_FLAGS
+
+};
+
+#define ULP_GNSS_SV_POLY_BIT_GLO_FREQ               (1<<ULP_GNSS_SV_POLY_GLO_FREQ)
+#define ULP_GNSS_SV_POLY_BIT_T0                     (1<<ULP_GNSS_SV_POLY_T0)
+#define ULP_GNSS_SV_POLY_BIT_IODE                   (1<<ULP_GNSS_SV_POLY_IODE)
+#define ULP_GNSS_SV_POLY_BIT_FLAG                   (1<<ULP_GNSS_SV_POLY_FLAG)
+#define ULP_GNSS_SV_POLY_BIT_POLYCOEFF_XYZ0         (1<<ULP_GNSS_SV_POLY_POLYCOEFF_XYZ0)
+#define ULP_GNSS_SV_POLY_BIT_POLYCOEFF_XYZN         (1<<ULP_GNSS_SV_POLY_POLYCOEFF_XYZN)
+#define ULP_GNSS_SV_POLY_BIT_POLYCOEFF_OTHER        (1<<ULP_GNSS_SV_POLY_POLYCOEFF_OTHER)
+#define ULP_GNSS_SV_POLY_BIT_SV_POSUNC              (1<<ULP_GNSS_SV_POLY_SV_POSUNC)
+#define ULP_GNSS_SV_POLY_BIT_IONODELAY              (1<<ULP_GNSS_SV_POLY_IONODELAY)
+#define ULP_GNSS_SV_POLY_BIT_IONODOT                (1<<ULP_GNSS_SV_POLY_IONODOT)
+#define ULP_GNSS_SV_POLY_BIT_SBAS_IONODELAY         (1<<ULP_GNSS_SV_POLY_SBAS_IONODELAY)
+#define ULP_GNSS_SV_POLY_BIT_SBAS_IONODOT           (1<<ULP_GNSS_SV_POLY_SBAS_IONODOT)
+#define ULP_GNSS_SV_POLY_BIT_TROPODELAY             (1<<ULP_GNSS_SV_POLY_TROPODELAY)
+#define ULP_GNSS_SV_POLY_BIT_ELEVATION              (1<<ULP_GNSS_SV_POLY_ELEVATION)
+#define ULP_GNSS_SV_POLY_BIT_ELEVATIONDOT           (1<<ULP_GNSS_SV_POLY_ELEVATIONDOT)
+#define ULP_GNSS_SV_POLY_BIT_ELEVATIONUNC           (1<<ULP_GNSS_SV_POLY_ELEVATIONUNC)
+#define ULP_GNSS_SV_POLY_BIT_VELO_COEFF             (1<<ULP_GNSS_SV_POLY_VELO_COEFF)
+#define ULP_GNSS_SV_POLY_BIT_ENHANCED_IOD           (1<<ULP_GNSS_SV_POLY_ENHANCED_IOD)
+
+
+typedef enum
+{
+    GNSS_LOC_SV_SYSTEM_GPS                    = 1,
+    /**< GPS satellite. */
+    GNSS_LOC_SV_SYSTEM_GALILEO                = 2,
+    /**< GALILEO satellite. */
+    GNSS_LOC_SV_SYSTEM_SBAS                   = 3,
+    /**< SBAS satellite. */
+    GNSS_LOC_SV_SYSTEM_COMPASS                = 4,
+    /**< COMPASS satellite. */
+    GNSS_LOC_SV_SYSTEM_GLONASS                = 5,
+    /**< GLONASS satellite. */
+    GNSS_LOC_SV_SYSTEM_BDS                    = 6,
+    /**< BDS satellite. */
+    GNSS_LOC_SV_SYSTEM_QZSS                   = 7
+    /**< QZSS satellite. */
+} Gnss_LocSvSystemEnumType;
+
+typedef enum
+{
+    GNSS_LOC_FREQ_SOURCE_INVALID = 0,
+    /**< Source of the frequency is invalid */
+    GNSS_LOC_FREQ_SOURCE_EXTERNAL = 1,
+    /**< Source of the frequency is from external injection */
+    GNSS_LOC_FREQ_SOURCE_PE_CLK_REPORT = 2,
+    /**< Source of the frequency is from Navigation engine */
+    GNSS_LOC_FREQ_SOURCE_UNKNOWN = 3
+    /**< Source of the frequency is unknown */
+} Gnss_LocSourceofFreqEnumType;
+
+typedef struct
+{
+    size_t                          size;
+    float                           clockDrift;
+    /**< Receiver clock Drift \n
+         - Units: meter per sec \n
+    */
+    float                           clockDriftUnc;
+    /**< Receiver clock Drift uncertainty \n
+         - Units: meter per sec \n
+    */
+    Gnss_LocSourceofFreqEnumType    sourceOfFreq;
+}Gnss_LocRcvrClockFrequencyInfoStructType;
+
+typedef struct
+{
+    size_t      size;
+    uint8_t     leapSec;
+    /**< GPS time leap second delta to UTC time  \n
+         - Units: sec \n
+       */
+    uint8_t     leapSecUnc;
+    /**< Uncertainty for GPS leap second \n
+         - Units: sec \n
+       */
+}Gnss_LeapSecondInfoStructType;
+
+typedef enum
+{
+   GNSS_LOC_SYS_TIME_BIAS_VALID                = 0x01,
+   /**< System time bias valid */
+   GNSS_LOC_SYS_TIME_BIAS_UNC_VALID            = 0x02,
+   /**< System time bias uncertainty valid */
+}Gnss_LocInterSystemBiasValidMaskType;
+
+typedef struct
+{
+    size_t          size;
+    uint32_t        validMask;
+    /* Validity mask as per Gnss_LocInterSystemBiasValidMaskType */
+
+    float           timeBias;
+    /**< System-1 to System-2 Time Bias  \n
+        - Units: msec \n
+    */
+    float           timeBiasUnc;
+    /**< System-1 to System-2 Time Bias uncertainty  \n
+        - Units: msec \n
+    */
+}Gnss_InterSystemBiasStructType;
+
+
+typedef struct
+{
+    size_t          size;
+    uint16_t        systemWeek;
+    /**< System week number for GPS, BDS and GAL satellite systems. \n
+         Set to 65535 when invalid or not available. \n
+         Not valid for GLONASS system. \n
+       */
+
+    uint32_t        systemMsec;
+    /**< System time msec. Time of Week for GPS, BDS, GAL and
+         Time of Day for GLONASS.
+         - Units: msec \n
+      */
+    float           systemClkTimeBias;
+    /**< System clock time bias \n
+         - Units: msec \n
+         System time = systemMsec - systemClkTimeBias \n
+      */
+    float           systemClkTimeUncMs;
+    /**< Single sided maximum time bias uncertainty \n
+                                                    - Units: msec \n
+      */
+}Gnss_LocSystemTimeStructType;
+
+typedef struct {
+
+  size_t        size;
+  uint8_t       gloFourYear;
+  /**<   GLONASS four year number from 1996. Refer to GLONASS ICD.\n
+        Applicable only for GLONASS and shall be ignored for other constellations. \n
+        If unknown shall be set to 255
+        */
+
+  uint16_t      gloDays;
+  /**<   GLONASS day number in four years. Refer to GLONASS ICD.
+        Applicable only for GLONASS and shall be ignored for other constellations. \n
+        If unknown shall be set to 65535
+        */
+
+  uint32_t      gloMsec;
+  /**<   GLONASS time of day in msec. Refer to GLONASS ICD.
+            - Units: msec \n
+        */
+
+  float         gloClkTimeBias;
+  /**<   System clock time bias (sub-millisecond) \n
+            - Units: msec \n
+        System time = systemMsec - systemClkTimeBias \n
+    */
+
+  float         gloClkTimeUncMs;
+  /**<   Single sided maximum time bias uncertainty \n
+                - Units: msec \n
+        */
+}Gnss_LocGloTimeStructType;  /* Type */
+
+typedef struct {
+
+  size_t    size;
+  uint32_t  refFCount;
+  /**<   Receiver frame counter value at reference tick */
+
+  uint8_t   systemRtc_valid;
+  /**<   Validity indicator for System RTC */
+
+  uint64_t  systemRtcMs;
+  /**<   Platform system RTC value \n
+        - Units: msec \n
+        */
+
+  uint32_t  sourceOfTime;
+  /**<   Source of time information */
+
+}Gnss_LocGnssTimeExtStructType;
+
+
+
+typedef enum
+{
+    GNSS_LOC_MEAS_STATUS_NULL                    = 0x00000000,
+    /**< No information state */
+    GNSS_LOC_MEAS_STATUS_SM_VALID                = 0x00000001,
+    /**< Code phase is known */
+    GNSS_LOC_MEAS_STATUS_SB_VALID                = 0x00000002,
+    /**< Sub-bit time is known */
+    GNSS_LOC_MEAS_STATUS_MS_VALID                = 0x00000004,
+    /**< Satellite time is known */
+    GNSS_LOC_MEAS_STATUS_BE_CONFIRM              = 0x00000008,
+    /**< Bit edge is confirmed from signal   */
+    GNSS_LOC_MEAS_STATUS_VELOCITY_VALID          = 0x00000010,
+    /**< Satellite Doppler measured */
+    GNSS_LOC_MEAS_STATUS_VELOCITY_FINE           = 0x00000020,
+    /**< TRUE: Fine Doppler measured, FALSE: Coarse Doppler measured */
+    GNSS_LOC_MEAS_STATUS_FROM_RNG_DIFF           = 0x00000200,
+    /**< Range update from Satellite differences */
+    GNSS_LOC_MEAS_STATUS_FROM_VE_DIFF            = 0x00000400,
+    /**< Doppler update from Satellite differences */
+    GNSS_LOC_MEAS_STATUS_DONT_USE_X              = 0x00000800,
+    /**< Don't use measurement if bit is set */
+    GNSS_LOC_MEAS_STATUS_DONT_USE_M              = 0x000001000,
+    /**< Don't use measurement if bit is set */
+    GNSS_LOC_MEAS_STATUS_DONT_USE_D              = 0x000002000,
+    /**< Don't use measurement if bit is set */
+    GNSS_LOC_MEAS_STATUS_DONT_USE_S              = 0x000004000,
+    /**< Don't use measurement if bit is set */
+    GNSS_LOC_MEAS_STATUS_DONT_USE_P              = 0x000008000
+    /**< Don't use measurement if bit is set */
+}Gnss_LocSvMeasStatusMaskType;
+
+typedef struct
+{
+    size_t              size;
+    uint32_t            svMs;
+    /**<  Satellite time milisecond.\n
+          For GPS, BDS, GAL range of 0 thru (604800000-1) \n
+          For GLONASS range of 0 thru (86400000-1) \n
+          Valid when PD_LOC_MEAS_STATUS_MS_VALID bit is set in measurement status \n
+          Note: All SV times in the current measurement block are alredy propagated to common reference time epoch. \n
+            - Units: msec \n
+       */
+    float               svSubMs;
+    /**<Satellite time sub-millisecond. \n
+        Total SV Time = svMs + svSubMs \n
+        - Units: msec \n
+       */
+    float               svTimeUncMs;
+    /**<  Satellite Time uncertainty \n
+          - Units: msec \n
+       */
+    float               dopplerShift;
+    /**< Satellite Doppler \n
+            - Units: meter per sec \n
+       */
+    float               dopplerShiftUnc;
+    /**< Satellite Doppler uncertainty\n
+            - Units: meter per sec \n
+       */
+}Gnss_LocSVTimeSpeedStructType;
+
+typedef enum
+{
+  GNSS_SV_STATE_IDLE = 0,
+  GNSS_SV_STATE_SEARCH = 1,
+  GNSS_SV_STATE_SEARCH_VERIFY = 2,
+  GNSS_SV_STATE_BIT_EDGE = 3,
+  GNSS_SV_STATE_VERIFY_TRACK = 4,
+  GNSS_SV_STATE_TRACK = 5,
+  GNSS_SV_STATE_RESTART = 6,
+  GNSS_SV_STATE_DPO_TRACK = 7
+} Gnss_LocSVStateEnumType;
+
+typedef enum
+{
+  GNSS_LOC_SVINFO_MASK_HAS_EPHEMERIS   = 0x01,
+  /**< Ephemeris is available for this SV */
+  GNSS_LOC_SVINFO_MASK_HAS_ALMANAC     = 0x02
+  /**< Almanac is available for this SV */
+}Gnss_LocSvInfoMaskT;
+
+typedef enum
+{
+  GNSS_LOC_SV_SRCH_STATUS_IDLE      = 1,
+    /**< SV is not being actively processed */
+  GNSS_LOC_SV_SRCH_STATUS_SEARCH    = 2,
+    /**< The system is searching for this SV */
+  GNSS_LOC_SV_SRCH_STATUS_TRACK     = 3
+    /**< SV is being tracked */
+}Gnss_LocSvSearchStatusEnumT;
+
+
+typedef struct
+{
+    size_t                          size;
+    uint16_t                        gnssSvId;
+    /**< GNSS SV ID.
+         \begin{itemize1}
+         \item Range:  \begin{itemize1}
+           \item For GPS:      1 to 32
+           \item For GLONASS:  1 to 32
+           \item For SBAS:     120 to 151
+           \item For BDS:      201 to 237
+         \end{itemize1} \end{itemize1}
+        The GPS and GLONASS SVs can be disambiguated using the system field.
+    */
+    uint8_t                         gloFrequency;
+    /**< GLONASS frequency number + 7 \n
+         Valid only for GLONASS System \n
+         Shall be ignored for all other systems \n
+          - Range: 1 to 14 \n
+    */
+    Gnss_LocSvSearchStatusEnumT     svStatus;
+    /**< Satellite search state \n
+        @ENUM()
+    */
+    bool                         healthStatus_valid;
+    /**< SV Health Status validity flag\n
+        - 0: Not valid \n
+        - 1: Valid \n
+    */
+    uint8_t                         healthStatus;
+    /**< Health status.
+         \begin{itemize1}
+         \item    Range: 0 to 1; 0 = unhealthy, \n 1 = healthy, 2 = unknown
+         \vspace{-0.18in} \end{itemize1}
+    */
+    Gnss_LocSvInfoMaskT             svInfoMask;
+    /**< Indicates whether almanac and ephemeris information is available. \n
+        @MASK()
+    */
+    uint64_t                        measurementStatus;
+    /**< Bitmask indicating SV measurement status.
+        Valid bitmasks: \n
+        If any MSB bit in 0xFFC0000000000000 DONT_USE is set, the measurement
+        must not be used by the client.
+        @MASK()
+    */
+    uint16_t                        CNo;
+    /**< Carrier to Noise ratio  \n
+        - Units: 0.1 dBHz \n
+    */
+    uint16_t                          gloRfLoss;
+    /**< GLONASS Rf loss reference to Antenna. \n
+         - Units: dB, Scale: 0.1 \n
+    */
+    bool                         lossOfLock;
+    /**< Loss of signal lock indicator  \n
+         - 0: Signal in continuous track \n
+         - 1: Signal not in track \n
+    */
+    int16_t                         measLatency;
+    /**< Age of the measurement. Positive value means measurement precedes ref time. \n
+         - Units: msec \n
+    */
+    Gnss_LocSVTimeSpeedStructType   svTimeSpeed;
+    /**< Unfiltered SV Time and Speed information
+    */
+    float                           dopplerAccel;
+    /**< Satellite Doppler Accelertion\n
+         - Units: Hz/s \n
+    */
+    bool                         multipathEstValid;
+    /**< Multipath estimate validity flag\n
+        - 0: Multipath estimate not valid \n
+        - 1: Multipath estimate valid \n
+    */
+    float                           multipathEstimate;
+    /**< Estimate of multipath in measurement\n
+         - Units: Meters \n
+    */
+    bool                         fineSpeedValid;
+    /**< Fine speed validity flag\n
+         - 0: Fine speed not valid \n
+         - 1: Fine speed valid \n
+    */
+    float                           fineSpeed;
+    /**< Carrier phase derived speed \n
+         - Units: m/s \n
+    */
+    bool                         fineSpeedUncValid;
+    /**< Fine speed uncertainty validity flag\n
+         - 0: Fine speed uncertainty not valid \n
+         - 1: Fine speed uncertainty valid \n
+    */
+    float                           fineSpeedUnc;
+    /**< Carrier phase derived speed \n
+        - Units: m/s \n
+    */
+    bool                         carrierPhaseValid;
+    /**< Carrier Phase measurement validity flag\n
+         - 0: Carrier Phase not valid \n
+         - 1: Carrier Phase valid \n
+    */
+    double                          carrierPhase;
+    /**< Carrier phase measurement [L1 cycles] \n
+    */
+    bool                         cycleSlipCountValid;
+     /**< Cycle slup count validity flag\n
+         - 0: Not valid \n
+         - 1: Valid \n
+    */
+    uint8_t                         cycleSlipCount;
+    /**< Increments when a CSlip is detected */
+
+    bool                         svDirectionValid;
+    /**< Validity flag for SV direction */
+
+    float                           svAzimuth;
+    /**< Satellite Azimuth
+        - Units: radians \n
+    */
+    float                           svElevation;
+    /**< Satellite Elevation
+        - Units: radians \n
+    */
+} Gnss_SVMeasurementStructType;
+
+/**< Maximum number of satellites in measurement block for given system. */
+
+typedef struct
+{
+    size_t                          size;
+    Gnss_LocSvSystemEnumType        system;
+    /**< Specifies the Satellite System Type
+    */
+    bool                            isSystemTimeValid;
+    /**< Indicates whether System Time is Valid:\n
+         - 0x01 (TRUE) --  System Time is valid \n
+         - 0x00 (FALSE) -- System Time is not valid
+    */
+    Gnss_LocSystemTimeStructType    systemTime;
+    /**< System Time Information \n
+    */
+    bool                            isGloTime_valid;
+    Gnss_LocGloTimeStructType       gloTime;
+
+    bool                            isSystemTimeExt_valid;
+    Gnss_LocGnssTimeExtStructType   systemTimeExt;
+
+    uint8_t                         numSvs;
+    /* Number of SVs in this report block */
+
+    Gnss_SVMeasurementStructType    svMeasurement[GNSS_LOC_SV_MEAS_LIST_MAX_SIZE];
+    /**< Satellite measurement Information \n
+    */
+} Gnss_ClockMeasurementStructType;
+
+
+typedef struct
+{
+    size_t                                      size;
+    uint8_t                                     seqNum;
+    /**< Current message Number */
+    uint8_t                                     maxMessageNum;
+    /**< Maximum number of message that will be sent for present time epoch. */
+
+    bool                                     leapSecValid;
+    Gnss_LeapSecondInfoStructType               leapSec;
+
+    Gnss_InterSystemBiasStructType              gpsGloInterSystemBias;
+
+    Gnss_InterSystemBiasStructType              gpsBdsInterSystemBias;
+
+    Gnss_InterSystemBiasStructType              gpsGalInterSystemBias;
+
+    Gnss_InterSystemBiasStructType              bdsGloInterSystemBias;
+
+    Gnss_InterSystemBiasStructType              galGloInterSystemBias;
+
+    Gnss_InterSystemBiasStructType              galBdsInterSystemBias;
+
+    bool                                     clockFreqValid;
+    Gnss_LocRcvrClockFrequencyInfoStructType    clockFreq;   /* Freq */
+    bool                                     gnssMeasValid;
+    Gnss_ClockMeasurementStructType             gnssMeas;
+    Gnss_ApTimeStampStructType               timeStamp;
+
+} GnssSvMeasurementSet;
+
+typedef enum
+{
+   GNSS_SV_POLY_COEFF_VALID             = 0x01,
+   /**< SV position in orbit coefficients are valid */
+   GNSS_SV_POLY_IONO_VALID              = 0x02,
+   /**< Iono estimates are valid */
+
+   GNSS_SV_POLY_TROPO_VALID             = 0x04,
+   /**< Tropo estimates are valid */
+
+   GNSS_SV_POLY_ELEV_VALID              = 0x08,
+   /**< Elevation, rate, uncertainty are valid */
+
+   GNSS_SV_POLY_SRC_ALM_CORR            = 0x10,
+   /**< Polynomials based on XTRA */
+
+   GNSS_SV_POLY_SBAS_IONO_VALID         = 0x20,
+   /**< SBAS IONO and rate are valid */
+
+   GNSS_SV_POLY_GLO_STR4                = 0x40
+   /**< GLONASS String 4 has been received */
+}Gnss_SvPolyStatusMaskType;
+
+
+typedef struct
+{
+    size_t      size;
+    uint16_t     gnssSvId;
+    /* GPS: 1-32, GLO: 65-96, 0: Invalid,
+       SBAS: 120-151, BDS:201-237,GAL:301 to 336
+       All others are reserved
+    */
+    int8_t      freqNum;
+    /* Freq index, only valid if u_SysInd is GLO */
+
+    uint8_t     svPolyFlags;
+    /* Indicate the validity of the elements
+    as per Gnss_SvPolyStatusMaskType
+    */
+
+    uint32_t    is_valid;
+
+    uint16_t     iode;
+    /* Ephemeris reference time
+       GPS:Issue of Data Ephemeris used [unitless].
+       GLO: Tb 7-bit, refer to ICD02
+    */
+    double      T0;
+    /* Reference time for polynominal calculations
+       GPS: Secs in week.
+       GLO: Full secs since Jan/01/96
+    */
+    double      polyCoeffXYZ0[GNSS_SV_POLY_XYZ_0_TH_ORDER_COEFF_MAX_SIZE];
+    /* C0X, C0Y, C0Z */
+    double      polyCoefXYZN[GNSS_SV_POLY_XYZ_N_TH_ORDER_COEFF_MAX_SIZE];
+    /* C1X, C2X ... C2Z, C3Z */
+    float       polyCoefOther[GNSS_SV_POLY_SV_CLKBIAS_COEFF_MAX_SIZE];
+    /* C0T, C1T, C2T, C3T */
+    float       svPosUnc;       /* SV position uncertainty [m]. */
+    float       ionoDelay;    /* Ionospheric delay at d_T0 [m]. */
+    float       ionoDot;      /* Iono delay rate [m/s].  */
+    float       sbasIonoDelay;/* SBAS Ionospheric delay at d_T0 [m]. */
+    float       sbasIonoDot;  /* SBAS Iono delay rate [m/s].  */
+    float       tropoDelay;   /* Tropospheric delay [m]. */
+    float       elevation;    /* Elevation [rad] at d_T0 */
+    float       elevationDot;      /* Elevation rate [rad/s] */
+    float       elevationUnc;      /* SV elevation [rad] uncertainty */
+    double      velCoef[GNSS_SV_POLY_VELOCITY_COEF_MAX_SIZE];
+    /* Coefficients of velocity poly */
+    uint32_t    enhancedIOD;    /*  Enhanced Reference Time */
+} GnssSvPolynomial;
+
+/* Various Short Range Node Technology type*/
+typedef enum {
+    SRN_AP_DATA_TECH_TYPE_NONE,
+    SRN_AP_DATA_TECH_TYPE_BT,
+    SRN_AP_DATA_TECH_TYPE_BTLE,
+    SRN_AP_DATA_TECH_TYPE_NFC,
+    SRN_AP_DATA_TECH_TYPE_MOBILE_CODE,
+    SRN_AP_DATA_TECH_TYPE_OTHER
+} Gnss_SrnTech;
+
+/* Mac Address type requested by modem */
+typedef enum {
+    SRN_AP_DATA_PUBLIC_MAC_ADDR_TYPE_INVALID, /* No valid mac address type send */
+    SRN_AP_DATA_PUBLIC_MAC_ADDR_TYPE_PUBLIC, /* SRN AP MAC Address type PUBLIC  */
+    SRN_AP_DATA_PUBLIC_MAC_ADDR_TYPE_PRIVATE, /* SRN AP MAC Address type PRIVATE  */
+    SRN_AP_DATA_PUBLIC_MAC_ADDR_TYPE_OTHER, /* SRN AP MAC Address type OTHER  */
+}Gnss_Srn_MacAddr_Type;
+
+typedef struct
+{
+    size_t                 size;
+    Gnss_SrnTech           srnTechType; /* SRN Technology type in request */
+    bool                   srnRequest; /* scan - start(true) or stop(false) */
+    bool                   e911Mode; /* If in E911 emergency */
+    Gnss_Srn_MacAddr_Type  macAddrType; /* SRN AP MAC Address type */
+} GnssSrnDataReq;
+
+/*
+ * Represents the status of AGNSS augmented to support IPv4.
+ */
+struct AGnssExtStatusIpV4 {
+    AGpsExtType type;
+    LocAGpsStatusValue status;
+    /*
+     * 32-bit IPv4 address.
+     */
+    uint32_t ipV4Addr;
+};
+
+/*
+ * Represents the status of AGNSS augmented to support IPv6.
+ */
+struct AGnssExtStatusIpV6 {
+    AGpsExtType type;
+    LocAGpsStatusValue status;
+    /*
+     * 128-bit IPv6 address.
+     */
+    uint8_t ipV6Addr[16];
+};
+
+/*
+ * Callback with AGNSS(IpV4) status information.
+ *
+ * @param status Will be of type AGnssExtStatusIpV4.
+ */
+typedef void (*AgnssStatusIpV4Cb)(AGnssExtStatusIpV4 status);
+
+/*
+ * Callback with AGNSS(IpV6) status information.
+ *
+ * @param status Will be of type AGnssExtStatusIpV6.
+ */
+typedef void (*AgnssStatusIpV6Cb)(AGnssExtStatusIpV6 status);
+
+/* Constructs for interaction with loc_net_iface library */
+typedef void (*LocAgpsOpenResultCb)(bool isSuccess, AGpsExtType agpsType, const char* apn,
+        AGpsBearerType bearerType, void* userDataPtr);
+
+typedef void (*LocAgpsCloseResultCb)(bool isSuccess, AGpsExtType agpsType, void* userDataPtr);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* GPS_EXTENDED_C_H */
diff --git a/gps/utils/linked_list.c b/gps/utils/linked_list.c
new file mode 100644
index 0000000..33185d0
--- /dev/null
+++ b/gps/utils/linked_list.c
@@ -0,0 +1,324 @@
+/* Copyright (c) 2011, 2014, 2017 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "linked_list.h"
+#include <stdio.h>
+#include <string.h>
+
+#define LOG_TAG "LocSvc_utils_ll"
+#include <platform_lib_includes.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+typedef struct list_element {
+   struct list_element* next;
+   struct list_element* prev;
+   void* data_ptr;
+   void (*dealloc_func)(void*);
+}list_element;
+
+typedef struct list_state {
+   list_element* p_head;
+   list_element* p_tail;
+} list_state;
+
+/* ----------------------- END INTERNAL FUNCTIONS ---------------------------------------- */
+
+/*===========================================================================
+
+  FUNCTION:   linked_list_init
+
+  ===========================================================================*/
+linked_list_err_type linked_list_init(void** list_data)
+{
+   if( list_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid list parameter!\n", __FUNCTION__);
+      return eLINKED_LIST_INVALID_PARAMETER;
+   }
+
+   list_state* tmp_list;
+   tmp_list = (list_state*)calloc(1, sizeof(list_state));
+   if( tmp_list == NULL )
+   {
+      LOC_LOGE("%s: Unable to allocate space for list!\n", __FUNCTION__);
+      return eLINKED_LIST_FAILURE_GENERAL;
+   }
+
+   tmp_list->p_head = NULL;
+   tmp_list->p_tail = NULL;
+
+   *list_data = tmp_list;
+
+   return eLINKED_LIST_SUCCESS;
+}
+
+/*===========================================================================
+
+  FUNCTION:   linked_list_destroy
+
+  ===========================================================================*/
+linked_list_err_type linked_list_destroy(void** list_data)
+{
+   if( list_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid list parameter!\n", __FUNCTION__);
+      return eLINKED_LIST_INVALID_HANDLE;
+   }
+
+   list_state* p_list = (list_state*)*list_data;
+
+   linked_list_flush(p_list);
+
+   free(*list_data);
+   *list_data = NULL;
+
+   return eLINKED_LIST_SUCCESS;
+}
+
+/*===========================================================================
+
+  FUNCTION:   linked_list_add
+
+  ===========================================================================*/
+linked_list_err_type linked_list_add(void* list_data, void *data_obj, void (*dealloc)(void*))
+{
+   if( list_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid list parameter!\n", __FUNCTION__);
+      return eLINKED_LIST_INVALID_HANDLE;
+   }
+
+   if( data_obj == NULL )
+   {
+      LOC_LOGE("%s: Invalid input parameter!\n", __FUNCTION__);
+      return eLINKED_LIST_INVALID_PARAMETER;
+   }
+
+   list_state* p_list = (list_state*)list_data;
+   list_element* elem = (list_element*)malloc(sizeof(list_element));
+   if( elem == NULL )
+   {
+      LOC_LOGE("%s: Memory allocation failed\n", __FUNCTION__);
+      return eLINKED_LIST_FAILURE_GENERAL;
+   }
+
+   /* Copy data to newly created element */
+   elem->data_ptr = data_obj;
+   elem->next = NULL;
+   elem->prev = NULL;
+   elem->dealloc_func = dealloc;
+
+   /* Replace head element */
+   list_element* tmp = p_list->p_head;
+   p_list->p_head = elem;
+   /* Point next to the previous head element */
+   p_list->p_head->next = tmp;
+
+   if( tmp != NULL )
+   {
+      tmp->prev = p_list->p_head;
+   }
+   else
+   {
+      p_list->p_tail = p_list->p_head;
+   }
+
+   return eLINKED_LIST_SUCCESS;
+}
+
+/*===========================================================================
+
+  FUNCTION:   linked_list_remove
+
+  ===========================================================================*/
+linked_list_err_type linked_list_remove(void* list_data, void **data_obj)
+{
+   if( list_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid list parameter!\n", __FUNCTION__);
+      return eLINKED_LIST_INVALID_HANDLE;
+   }
+
+   if( data_obj == NULL )
+   {
+      LOC_LOGE("%s: Invalid input parameter!\n", __FUNCTION__);
+      return eLINKED_LIST_INVALID_PARAMETER;
+   }
+
+   list_state* p_list = (list_state*)list_data;
+   if( p_list->p_tail == NULL )
+   {
+      return eLINKED_LIST_UNAVAILABLE_RESOURCE;
+   }
+
+   list_element* tmp = p_list->p_tail;
+
+   /* Replace tail element */
+   p_list->p_tail = tmp->prev;
+
+   if( p_list->p_tail != NULL )
+   {
+      p_list->p_tail->next = NULL;
+   }
+   else
+   {
+      p_list->p_head = p_list->p_tail;
+   }
+
+   /* Copy data to output param */
+   *data_obj = tmp->data_ptr;
+
+   /* Free allocated list element */
+   free(tmp);
+
+   return eLINKED_LIST_SUCCESS;
+}
+
+/*===========================================================================
+
+  FUNCTION:   linked_list_empty
+
+  ===========================================================================*/
+int linked_list_empty(void* list_data)
+{
+   if( list_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid list parameter!\n", __FUNCTION__);
+      return (int)eLINKED_LIST_INVALID_HANDLE;
+   }
+   else
+   {
+      list_state* p_list = (list_state*)list_data;
+      return p_list->p_head == NULL ? 1 : 0;
+   }
+}
+
+/*===========================================================================
+
+  FUNCTION:   linked_list_flush
+
+  ===========================================================================*/
+linked_list_err_type linked_list_flush(void* list_data)
+{
+   if( list_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid list parameter!\n", __FUNCTION__);
+      return eLINKED_LIST_INVALID_HANDLE;
+   }
+
+   list_state* p_list = (list_state*)list_data;
+
+   /* Remove all dynamically allocated elements */
+   while( p_list->p_head != NULL )
+   {
+      list_element* tmp = p_list->p_head->next;
+
+      /* Free data pointer if told to do so. */
+      if( p_list->p_head->dealloc_func != NULL )
+      {
+         p_list->p_head->dealloc_func(p_list->p_head->data_ptr);
+      }
+
+      /* Free list element */
+      free(p_list->p_head);
+
+      p_list->p_head = tmp;
+   }
+
+   p_list->p_tail = NULL;
+
+   return eLINKED_LIST_SUCCESS;
+}
+
+/*===========================================================================
+
+  FUNCTION:   linked_list_search
+
+  ===========================================================================*/
+linked_list_err_type linked_list_search(void* list_data, void **data_p,
+                                        bool (*equal)(void* data_0, void* data),
+                                        void* data_0, bool rm_if_found)
+{
+   if( list_data == NULL || NULL == equal )
+   {
+      LOC_LOGE("%s: Invalid list parameter! list_data %p equal %p\n",
+               __FUNCTION__, list_data, equal);
+      return eLINKED_LIST_INVALID_HANDLE;
+   }
+
+   list_state* p_list = (list_state*)list_data;
+   if( p_list->p_tail == NULL )
+   {
+      return eLINKED_LIST_UNAVAILABLE_RESOURCE;
+   }
+
+   list_element* tmp = p_list->p_head;
+
+   if (NULL != data_p) {
+     *data_p = NULL;
+   }
+
+   while (NULL != tmp) {
+     if ((*equal)(data_0, tmp->data_ptr)) {
+       if (NULL != data_p) {
+         *data_p = tmp->data_ptr;
+       }
+
+       if (rm_if_found) {
+         if (NULL == tmp->prev) {
+           p_list->p_head = tmp->next;
+         } else {
+           tmp->prev->next = tmp->next;
+         }
+
+         if (NULL == tmp->next) {
+           p_list->p_tail = tmp->prev;
+         } else {
+           tmp->next->prev = tmp->prev;
+         }
+
+         tmp->prev = tmp->next = NULL;
+
+         // dealloc data if it is not copied out && caller
+         // has given us a dealloc function pointer.
+         if (NULL == data_p && NULL != tmp->dealloc_func) {
+             tmp->dealloc_func(tmp->data_ptr);
+         }
+         free(tmp);
+       }
+
+       tmp = NULL;
+     } else {
+       tmp = tmp->next;
+     }
+   }
+
+   return eLINKED_LIST_SUCCESS;
+}
+
diff --git a/gps/utils/linked_list.h b/gps/utils/linked_list.h
new file mode 100644
index 0000000..a85f09a
--- /dev/null
+++ b/gps/utils/linked_list.h
@@ -0,0 +1,217 @@
+/* Copyright (c) 2011, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef __LINKED_LIST_H__
+#define __LINKED_LIST_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+/** Linked List Return Codes */
+typedef enum
+{
+  eLINKED_LIST_SUCCESS                             = 0,
+     /**< Request was successful. */
+  eLINKED_LIST_FAILURE_GENERAL                     = -1,
+     /**< Failed because of a general failure. */
+  eLINKED_LIST_INVALID_PARAMETER                   = -2,
+     /**< Failed because the request contained invalid parameters. */
+  eLINKED_LIST_INVALID_HANDLE                      = -3,
+     /**< Failed because an invalid handle was specified. */
+  eLINKED_LIST_UNAVAILABLE_RESOURCE                = -4,
+     /**< Failed because an there were not enough resources. */
+  eLINKED_LIST_INSUFFICIENT_BUFFER                 = -5,
+     /**< Failed because an the supplied buffer was too small. */
+}linked_list_err_type;
+
+/*===========================================================================
+FUNCTION    linked_list_init
+
+DESCRIPTION
+   Initializes internal structures for linked list.
+
+   list_data: State of list to be initialized.
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+linked_list_err_type linked_list_init(void** list_data);
+
+/*===========================================================================
+FUNCTION    linked_list_destroy
+
+DESCRIPTION
+   Destroys internal structures for linked list.
+
+   p_list_data: State of list to be destroyed.
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+linked_list_err_type linked_list_destroy(void** list_data);
+
+/*===========================================================================
+FUNCTION    linked_list_add
+
+DESCRIPTION
+   Adds an element to the head of the linked list. The passed in data pointer
+   is not modified or freed. Passed in data_obj is expected to live throughout
+   the use of the linked_list (i.e. data is not allocated internally)
+
+   p_list_data:  List to add data to the head of.
+   data_obj:     Pointer to data to add into list
+   dealloc:      Function used to deallocate memory for this element. Pass NULL
+                 if you do not want data deallocated during a flush operation
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+linked_list_err_type linked_list_add(void* list_data, void *data_obj, void (*dealloc)(void*));
+
+/*===========================================================================
+FUNCTION    linked_list_remove
+
+DESCRIPTION
+   Retrieves data from the list tail. data_obj is the tail element from the list
+   passed in by linked_list_add.
+
+   p_list_data:  List to remove the tail from.
+   data_obj:     Pointer to data removed from list
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+linked_list_err_type linked_list_remove(void* list_data, void **data_obj);
+
+/*===========================================================================
+FUNCTION    linked_list_empty
+
+DESCRIPTION
+   Tells whether the list currently contains any elements
+
+   p_list_data:  List to check if empty.
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   0/FALSE : List contains elements
+   1/TRUE  : List is Empty
+   Otherwise look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+int linked_list_empty(void* list_data);
+
+/*===========================================================================
+FUNCTION    linked_list_flush
+
+DESCRIPTION
+   Removes all elements from the list and deallocates them using the provided
+   dealloc function while adding elements.
+
+   p_list_data:  List to remove all elements from.
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+linked_list_err_type linked_list_flush(void* list_data);
+
+/*===========================================================================
+FUNCTION    linked_list_search
+
+DESCRIPTION
+   Searches for an element in the linked list.
+
+   p_list_data:  List handle.
+   data_p:       to be stored with the data found; NUll if no match.
+                 if data_p passed in as NULL, then no write to it.
+   equal:        Function ptr takes in a list element, and returns
+                 indication if this the one looking for.
+   data_0:       The data being compared against.
+   rm_if_found:  Should data be removed if found?
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+linked_list_err_type linked_list_search(void* list_data, void **data_p,
+                                        bool (*equal)(void* data_0, void* data),
+                                        void* data_0, bool rm_if_found);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __LINKED_LIST_H__ */
diff --git a/gps/utils/loc_cfg.cpp b/gps/utils/loc_cfg.cpp
new file mode 100644
index 0000000..d2364f6
--- /dev/null
+++ b/gps/utils/loc_cfg.cpp
@@ -0,0 +1,400 @@
+/* Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#define LOG_NDEBUG 0
+#define LOG_TAG "LocSvc_utils_cfg"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <time.h>
+#include <loc_cfg.h>
+#include <platform_lib_includes.h>
+#include <loc_misc_utils.h>
+#ifdef USE_GLIB
+#include <glib.h>
+#endif
+#include "platform_lib_includes.h"
+
+/*=============================================================================
+ *
+ *                          GLOBAL DATA DECLARATION
+ *
+ *============================================================================*/
+
+/* Parameter data */
+static uint32_t DEBUG_LEVEL = 0xff;
+static uint32_t TIMESTAMP = 0;
+
+/* Parameter spec table */
+static const loc_param_s_type loc_param_table[] =
+{
+    {"DEBUG_LEVEL",    &DEBUG_LEVEL, NULL,    'n'},
+    {"TIMESTAMP",      &TIMESTAMP,   NULL,    'n'},
+};
+static const int loc_param_num = sizeof(loc_param_table) / sizeof(loc_param_s_type);
+
+typedef struct loc_param_v_type
+{
+    char* param_name;
+    char* param_str_value;
+    int param_int_value;
+    double param_double_value;
+}loc_param_v_type;
+
+/*===========================================================================
+FUNCTION loc_set_config_entry
+
+DESCRIPTION
+   Potentially sets a given configuration table entry based on the passed in
+   configuration value. This is done by using a string comparison of the
+   parameter names and those found in the configuration file.
+
+PARAMETERS:
+   config_entry: configuration entry in the table to possibly set
+   config_value: value to store in the entry if the parameter names match
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   None
+
+SIDE EFFECTS
+   N/A
+===========================================================================*/
+int loc_set_config_entry(const loc_param_s_type* config_entry, loc_param_v_type* config_value)
+{
+    int ret=-1;
+    if(NULL == config_entry || NULL == config_value)
+    {
+        LOC_LOGE("%s: INVALID config entry or parameter", __FUNCTION__);
+        return ret;
+    }
+
+    if (strcmp(config_entry->param_name, config_value->param_name) == 0 &&
+        config_entry->param_ptr)
+    {
+        switch (config_entry->param_type)
+        {
+        case 's':
+            if (strcmp(config_value->param_str_value, "NULL") == 0)
+            {
+                *((char*)config_entry->param_ptr) = '\0';
+            }
+            else {
+                strlcpy((char*) config_entry->param_ptr,
+                        config_value->param_str_value,
+                        LOC_MAX_PARAM_STRING + 1);
+            }
+            /* Log INI values */
+            LOC_LOGD("%s: PARAM %s = %s", __FUNCTION__,
+                     config_entry->param_name, (char*)config_entry->param_ptr);
+
+            if(NULL != config_entry->param_set)
+            {
+                *(config_entry->param_set) = 1;
+            }
+            ret = 0;
+            break;
+        case 'n':
+            *((int *)config_entry->param_ptr) = config_value->param_int_value;
+            /* Log INI values */
+            LOC_LOGD("%s: PARAM %s = %d", __FUNCTION__,
+                     config_entry->param_name, config_value->param_int_value);
+
+            if(NULL != config_entry->param_set)
+            {
+                *(config_entry->param_set) = 1;
+            }
+            ret = 0;
+            break;
+        case 'f':
+            *((double *)config_entry->param_ptr) = config_value->param_double_value;
+            /* Log INI values */
+            LOC_LOGD("%s: PARAM %s = %f", __FUNCTION__,
+                     config_entry->param_name, config_value->param_double_value);
+
+            if(NULL != config_entry->param_set)
+            {
+                *(config_entry->param_set) = 1;
+            }
+            ret = 0;
+            break;
+        default:
+            LOC_LOGE("%s: PARAM %s parameter type must be n, f, or s",
+                     __FUNCTION__, config_entry->param_name);
+        }
+    }
+    return ret;
+}
+
+/*===========================================================================
+FUNCTION loc_fill_conf_item
+
+DESCRIPTION
+   Takes a line of configuration item and sets defined values based on
+   the passed in configuration table. This table maps strings to values to
+   set along with the type of each of these values.
+
+PARAMETERS:
+   input_buf : buffer contanis config item
+   config_table: table definition of strings to places to store information
+   table_length: length of the configuration table
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   0: Number of records in the config_table filled with input_buf
+
+SIDE EFFECTS
+   N/A
+===========================================================================*/
+int loc_fill_conf_item(char* input_buf,
+                       const loc_param_s_type* config_table, uint32_t table_length)
+{
+    int ret = 0;
+
+    if (input_buf && config_table) {
+        char *lasts;
+        loc_param_v_type config_value;
+        memset(&config_value, 0, sizeof(config_value));
+
+        /* Separate variable and value */
+        config_value.param_name = strtok_r(input_buf, "=", &lasts);
+        /* skip lines that do not contain "=" */
+        if (config_value.param_name) {
+            config_value.param_str_value = strtok_r(NULL, "=", &lasts);
+
+            /* skip lines that do not contain two operands */
+            if (config_value.param_str_value) {
+                /* Trim leading and trailing spaces */
+                loc_util_trim_space(config_value.param_name);
+                loc_util_trim_space(config_value.param_str_value);
+
+                /* Parse numerical value */
+                if ((strlen(config_value.param_str_value) >=3) &&
+                    (config_value.param_str_value[0] == '0') &&
+                    (tolower(config_value.param_str_value[1]) == 'x'))
+                {
+                    /* hex */
+                    config_value.param_int_value = (int) strtol(&config_value.param_str_value[2],
+                                                                (char**) NULL, 16);
+                }
+                else {
+                    config_value.param_double_value = (double) atof(config_value.param_str_value); /* float */
+                    config_value.param_int_value = atoi(config_value.param_str_value); /* dec */
+                }
+
+                for(uint32_t i = 0; NULL != config_table && i < table_length; i++)
+                {
+                    if(!loc_set_config_entry(&config_table[i], &config_value)) {
+                        ret += 1;
+                    }
+                }
+            }
+        }
+    }
+
+    return ret;
+}
+
+/*===========================================================================
+FUNCTION loc_read_conf_r (repetitive)
+
+DESCRIPTION
+   Reads the specified configuration file and sets defined values based on
+   the passed in configuration table. This table maps strings to values to
+   set along with the type of each of these values.
+   The difference between this and loc_read_conf is that this function returns
+   the file pointer position at the end of filling a config table. Also, it
+   reads a fixed number of parameters at a time which is equal to the length
+   of the configuration table. This functionality enables the caller to
+   repeatedly call the function to read data from the same file.
+
+PARAMETERS:
+   conf_fp : file pointer
+   config_table: table definition of strings to places to store information
+   table_length: length of the configuration table
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   0: Table filled successfully
+   1: No more parameters to read
+  -1: Error filling table
+
+SIDE EFFECTS
+   N/A
+===========================================================================*/
+int loc_read_conf_r(FILE *conf_fp, const loc_param_s_type* config_table, uint32_t table_length)
+{
+    int ret=0;
+
+    unsigned int num_params=table_length;
+    if(conf_fp == NULL) {
+        LOC_LOGE("%s:%d]: ERROR: File pointer is NULL\n", __func__, __LINE__);
+        ret = -1;
+        goto err;
+    }
+
+    /* Clear all validity bits */
+    for(uint32_t i = 0; NULL != config_table && i < table_length; i++)
+    {
+        if(NULL != config_table[i].param_set)
+        {
+            *(config_table[i].param_set) = 0;
+        }
+    }
+
+    char input_buf[LOC_MAX_PARAM_LINE];  /* declare a char array */
+
+    LOC_LOGD("%s:%d]: num_params: %d\n", __func__, __LINE__, num_params);
+    while(num_params)
+    {
+        if(!fgets(input_buf, LOC_MAX_PARAM_LINE, conf_fp)) {
+            LOC_LOGD("%s:%d]: fgets returned NULL\n", __func__, __LINE__);
+            break;
+        }
+
+        num_params -= loc_fill_conf_item(input_buf, config_table, table_length);
+    }
+
+err:
+    return ret;
+}
+
+/*===========================================================================
+FUNCTION loc_udpate_conf
+
+DESCRIPTION
+   Parses the passed in buffer for configuration items, and update the table
+   that is also passed in.
+
+Reads the specified configuration file and sets defined values based on
+   the passed in configuration table. This table maps strings to values to
+   set along with the type of each of these values.
+
+PARAMETERS:
+   conf_data: configuration items in bufferas a string
+   length: strlen(conf_data)
+   config_table: table definition of strings to places to store information
+   table_length: length of the configuration table
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   number of the records in the table that is updated at time of return.
+
+SIDE EFFECTS
+   N/A
+===========================================================================*/
+int loc_update_conf(const char* conf_data, int32_t length,
+                    const loc_param_s_type* config_table, uint32_t table_length)
+{
+    int ret = -1;
+
+    if (conf_data && length && config_table && table_length) {
+        // make a copy, so we do not tokenize the original data
+        char* conf_copy = (char*)malloc(length+1);
+
+        if (conf_copy != NULL)
+        {
+            memcpy(conf_copy, conf_data, length);
+            // we hard NULL the end of string to be safe
+            conf_copy[length] = 0;
+
+            // start with one record off
+            uint32_t num_params = table_length - 1;
+            char* saveptr = NULL;
+            char* input_buf = strtok_r(conf_copy, "\n", &saveptr);
+            ret = 0;
+
+            LOC_LOGD("%s:%d]: num_params: %d\n", __func__, __LINE__, num_params);
+            while(num_params && input_buf) {
+                ret++;
+                num_params -= loc_fill_conf_item(input_buf, config_table, table_length);
+                input_buf = strtok_r(NULL, "\n", &saveptr);
+            }
+            free(conf_copy);
+        }
+    }
+
+    return ret;
+}
+
+/*===========================================================================
+FUNCTION loc_read_conf
+
+DESCRIPTION
+   Reads the specified configuration file and sets defined values based on
+   the passed in configuration table. This table maps strings to values to
+   set along with the type of each of these values.
+
+PARAMETERS:
+   conf_file_name: configuration file to read
+   config_table: table definition of strings to places to store information
+   table_length: length of the configuration table
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   None
+
+SIDE EFFECTS
+   N/A
+===========================================================================*/
+void loc_read_conf(const char* conf_file_name, const loc_param_s_type* config_table,
+                   uint32_t table_length)
+{
+    FILE *conf_fp = NULL;
+    char *lasts;
+    loc_param_v_type config_value;
+    uint32_t i;
+
+    if((conf_fp = fopen(conf_file_name, "r")) != NULL)
+    {
+        LOC_LOGD("%s: using %s", __FUNCTION__, conf_file_name);
+        if(table_length && config_table) {
+            loc_read_conf_r(conf_fp, config_table, table_length);
+            rewind(conf_fp);
+        }
+        loc_read_conf_r(conf_fp, loc_param_table, loc_param_num);
+        fclose(conf_fp);
+    }
+    /* Initialize logging mechanism with parsed data */
+    loc_logger_init(DEBUG_LEVEL, TIMESTAMP);
+}
diff --git a/gps/utils/loc_cfg.h b/gps/utils/loc_cfg.h
new file mode 100644
index 0000000..0a0f100
--- /dev/null
+++ b/gps/utils/loc_cfg.h
@@ -0,0 +1,91 @@
+/* Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef LOC_CFG_H
+#define LOC_CFG_H
+
+#include <stdio.h>
+#include <stdint.h>
+
+#define LOC_MAX_PARAM_NAME                 80
+#define LOC_MAX_PARAM_STRING               80
+#define LOC_MAX_PARAM_LINE    (LOC_MAX_PARAM_NAME + LOC_MAX_PARAM_STRING)
+
+#define UTIL_UPDATE_CONF(conf_data, len, config_table) \
+    loc_update_conf((conf_data), (len), (config_table), \
+                    sizeof(config_table) / sizeof(config_table[0]))
+
+#define UTIL_READ_CONF_DEFAULT(filename) \
+    loc_read_conf((filename), NULL, 0);
+
+#define UTIL_READ_CONF(filename, config_table) \
+    loc_read_conf((filename), (config_table), sizeof(config_table) / sizeof(config_table[0]))
+
+/*=============================================================================
+ *
+ *                        MODULE TYPE DECLARATION
+ *
+ *============================================================================*/
+typedef struct
+{
+  const char                    *param_name;
+  void                          *param_ptr;
+  uint8_t                       *param_set;   /* indicate value set by config file */
+  char                           param_type;  /* 'n' for number,
+                                                 's' for string,
+                                                 'f' for double */
+} loc_param_s_type;
+
+/*=============================================================================
+ *
+ *                          MODULE EXTERNAL DATA
+ *
+ *============================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*=============================================================================
+ *
+ *                       MODULE EXPORTED FUNCTIONS
+ *
+ *============================================================================*/
+void loc_read_conf(const char* conf_file_name,
+                   const loc_param_s_type* config_table,
+                   uint32_t table_length);
+int loc_read_conf_r(FILE *conf_fp, const loc_param_s_type* config_table,
+                    uint32_t table_length);
+int loc_update_conf(const char* conf_data, int32_t length,
+                    const loc_param_s_type* config_table, uint32_t table_length);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LOC_CFG_H */
diff --git a/gps/utils/loc_gps.h b/gps/utils/loc_gps.h
new file mode 100644
index 0000000..5e915a3
--- /dev/null
+++ b/gps/utils/loc_gps.h
@@ -0,0 +1,2209 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef LOC_GPS_H
+#define LOC_GPS_H
+
+#include <stdint.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <pthread.h>
+#include <sys/socket.h>
+#include <stdbool.h>
+
+__BEGIN_DECLS
+
+#define LOC_FLP_STATUS_LOCATION_AVAILABLE         0
+#define LOC_FLP_STATUS_LOCATION_UNAVAILABLE       1
+#define LOC_CAPABILITY_GNSS         (1U<<0)
+#define LOC_CAPABILITY_WIFI         (1U<<1)
+#define LOC_CAPABILITY_CELL         (1U<<3)
+
+/** Milliseconds since January 1, 1970 */
+typedef int64_t LocGpsUtcTime;
+
+/** Maximum number of SVs for loc_gps_sv_status_callback(). */
+#define LOC_GPS_MAX_SVS 32
+/** Maximum number of SVs for loc_gps_sv_status_callback(). */
+#define LOC_GNSS_MAX_SVS 64
+
+/** Maximum number of Measurements in loc_gps_measurement_callback(). */
+#define LOC_GPS_MAX_MEASUREMENT   32
+
+/** Maximum number of Measurements in loc_gnss_measurement_callback(). */
+#define LOC_GNSS_MAX_MEASUREMENT   64
+
+/** Requested operational mode for GPS operation. */
+typedef uint32_t LocGpsPositionMode;
+/* IMPORTANT: Note that the following values must match
+ * constants in GpsLocationProvider.java. */
+/** Mode for running GPS standalone (no assistance). */
+#define LOC_GPS_POSITION_MODE_STANDALONE    0
+/** AGPS MS-Based mode. */
+#define LOC_GPS_POSITION_MODE_MS_BASED      1
+/**
+ * AGPS MS-Assisted mode. This mode is not maintained by the platform anymore.
+ * It is strongly recommended to use LOC_GPS_POSITION_MODE_MS_BASED instead.
+ */
+#define LOC_GPS_POSITION_MODE_MS_ASSISTED   2
+
+/** Requested recurrence mode for GPS operation. */
+typedef uint32_t LocGpsPositionRecurrence;
+/* IMPORTANT: Note that the following values must match
+ * constants in GpsLocationProvider.java. */
+/** Receive GPS fixes on a recurring basis at a specified period. */
+#define LOC_GPS_POSITION_RECURRENCE_PERIODIC    0
+/** Request a single shot GPS fix. */
+#define LOC_GPS_POSITION_RECURRENCE_SINGLE      1
+
+/** GPS status event values. */
+typedef uint16_t LocGpsStatusValue;
+/* IMPORTANT: Note that the following values must match
+ * constants in GpsLocationProvider.java. */
+/** GPS status unknown. */
+#define LOC_GPS_STATUS_NONE             0
+/** GPS has begun navigating. */
+#define LOC_GPS_STATUS_SESSION_BEGIN    1
+/** GPS has stopped navigating. */
+#define LOC_GPS_STATUS_SESSION_END      2
+/** GPS has powered on but is not navigating. */
+#define LOC_GPS_STATUS_ENGINE_ON        3
+/** GPS is powered off. */
+#define LOC_GPS_STATUS_ENGINE_OFF       4
+
+/** Flags to indicate which values are valid in a LocGpsLocation. */
+typedef uint16_t LocGpsLocationFlags;
+/* IMPORTANT: Note that the following values must match
+ * constants in GpsLocationProvider.java. */
+/** LocGpsLocation has valid latitude and longitude. */
+#define LOC_GPS_LOCATION_HAS_LAT_LONG   0x0001
+/** LocGpsLocation has valid altitude. */
+#define LOC_GPS_LOCATION_HAS_ALTITUDE   0x0002
+/** LocGpsLocation has valid speed. */
+#define LOC_GPS_LOCATION_HAS_SPEED      0x0004
+/** LocGpsLocation has valid bearing. */
+#define LOC_GPS_LOCATION_HAS_BEARING    0x0008
+/** LocGpsLocation has valid accuracy. */
+#define LOC_GPS_LOCATION_HAS_ACCURACY   0x0010
+/** LocGpsLocation has valid vertical uncertainity */
+#define LOC_GPS_LOCATION_HAS_VERT_UNCERTAINITY   0x0040
+
+/** Flags for the loc_gps_set_capabilities callback. */
+
+/**
+ * GPS HAL schedules fixes for LOC_GPS_POSITION_RECURRENCE_PERIODIC mode. If this is
+ * not set, then the framework will use 1000ms for min_interval and will start
+ * and call start() and stop() to schedule the GPS.
+ */
+#define LOC_GPS_CAPABILITY_SCHEDULING       (1 << 0)
+/** GPS supports MS-Based AGPS mode */
+#define LOC_GPS_CAPABILITY_MSB              (1 << 1)
+/** GPS supports MS-Assisted AGPS mode */
+#define LOC_GPS_CAPABILITY_MSA              (1 << 2)
+/** GPS supports single-shot fixes */
+#define LOC_GPS_CAPABILITY_SINGLE_SHOT      (1 << 3)
+/** GPS supports on demand time injection */
+#define LOC_GPS_CAPABILITY_ON_DEMAND_TIME   (1 << 4)
+/** GPS supports Geofencing  */
+#define LOC_GPS_CAPABILITY_GEOFENCING       (1 << 5)
+/** GPS supports Measurements. */
+#define LOC_GPS_CAPABILITY_MEASUREMENTS     (1 << 6)
+/** GPS supports Navigation Messages */
+#define LOC_GPS_CAPABILITY_NAV_MESSAGES     (1 << 7)
+
+/**
+ * Flags used to specify which aiding data to delete when calling
+ * delete_aiding_data().
+ */
+typedef uint16_t LocGpsAidingData;
+/* IMPORTANT: Note that the following values must match
+ * constants in GpsLocationProvider.java. */
+#define LOC_GPS_DELETE_EPHEMERIS        0x0001
+#define LOC_GPS_DELETE_ALMANAC          0x0002
+#define LOC_GPS_DELETE_POSITION         0x0004
+#define LOC_GPS_DELETE_TIME             0x0008
+#define LOC_GPS_DELETE_IONO             0x0010
+#define LOC_GPS_DELETE_UTC              0x0020
+#define LOC_GPS_DELETE_HEALTH           0x0040
+#define LOC_GPS_DELETE_SVDIR            0x0080
+#define LOC_GPS_DELETE_SVSTEER          0x0100
+#define LOC_GPS_DELETE_SADATA           0x0200
+#define LOC_GPS_DELETE_RTI              0x0400
+#define LOC_GPS_DELETE_CELLDB_INFO      0x8000
+#define LOC_GPS_DELETE_ALL              0xFFFF
+
+/** AGPS type */
+typedef uint16_t LocAGpsType;
+#define LOC_AGPS_TYPE_SUPL          1
+#define LOC_AGPS_TYPE_C2K           2
+
+typedef uint16_t LocAGpsSetIDType;
+#define LOC_AGPS_SETID_TYPE_NONE    0
+#define LOC_AGPS_SETID_TYPE_IMSI    1
+#define LOC_AGPS_SETID_TYPE_MSISDN  2
+
+typedef uint16_t LocApnIpType;
+#define LOC_APN_IP_INVALID          0
+#define LOC_APN_IP_IPV4             1
+#define LOC_APN_IP_IPV6             2
+#define LOC_APN_IP_IPV4V6           3
+
+/**
+ * String length constants
+ */
+#define LOC_GPS_NI_SHORT_STRING_MAXLEN      256
+#define LOC_GPS_NI_LONG_STRING_MAXLEN       2048
+
+/**
+ * LocGpsNiType constants
+ */
+typedef uint32_t LocGpsNiType;
+#define LOC_GPS_NI_TYPE_VOICE              1
+#define LOC_GPS_NI_TYPE_UMTS_SUPL          2
+#define LOC_GPS_NI_TYPE_UMTS_CTRL_PLANE    3
+/*Emergency SUPL*/
+#define LOC_GPS_NI_TYPE_EMERGENCY_SUPL     4
+
+/**
+ * LocGpsNiNotifyFlags constants
+ */
+typedef uint32_t LocGpsNiNotifyFlags;
+/** NI requires notification */
+#define LOC_GPS_NI_NEED_NOTIFY          0x0001
+/** NI requires verification */
+#define LOC_GPS_NI_NEED_VERIFY          0x0002
+/** NI requires privacy override, no notification/minimal trace */
+#define LOC_GPS_NI_PRIVACY_OVERRIDE     0x0004
+
+/**
+ * GPS NI responses, used to define the response in
+ * NI structures
+ */
+typedef int LocGpsUserResponseType;
+#define LOC_GPS_NI_RESPONSE_ACCEPT         1
+#define LOC_GPS_NI_RESPONSE_DENY           2
+#define LOC_GPS_NI_RESPONSE_NORESP         3
+
+/**
+ * NI data encoding scheme
+ */
+typedef int LocGpsNiEncodingType;
+#define LOC_GPS_ENC_NONE                   0
+#define LOC_GPS_ENC_SUPL_GSM_DEFAULT       1
+#define LOC_GPS_ENC_SUPL_UTF8              2
+#define LOC_GPS_ENC_SUPL_UCS2              3
+#define LOC_GPS_ENC_UNKNOWN                -1
+
+/** AGPS status event values. */
+typedef uint8_t LocAGpsStatusValue;
+/** GPS requests data connection for AGPS. */
+#define LOC_GPS_REQUEST_AGPS_DATA_CONN  1
+/** GPS releases the AGPS data connection. */
+#define LOC_GPS_RELEASE_AGPS_DATA_CONN  2
+/** AGPS data connection initiated */
+#define LOC_GPS_AGPS_DATA_CONNECTED     3
+/** AGPS data connection completed */
+#define LOC_GPS_AGPS_DATA_CONN_DONE     4
+/** AGPS data connection failed */
+#define LOC_GPS_AGPS_DATA_CONN_FAILED   5
+
+typedef uint16_t LocAGpsRefLocationType;
+#define LOC_AGPS_REF_LOCATION_TYPE_GSM_CELLID   1
+#define LOC_AGPS_REF_LOCATION_TYPE_UMTS_CELLID  2
+#define LOC_AGPS_REF_LOCATION_TYPE_MAC          3
+#define LOC_AGPS_REF_LOCATION_TYPE_LTE_CELLID   4
+
+/* Deprecated, to be removed in the next Android release. */
+#define LOC_AGPS_REG_LOCATION_TYPE_MAC          3
+
+/** Network types for update_network_state "type" parameter */
+#define LOC_AGPS_RIL_NETWORK_TYPE_MOBILE        0
+#define LOC_AGPS_RIL_NETWORK_TYPE_WIFI          1
+#define LOC_AGPS_RIL_NETWORK_TYPE_MOBILE_MMS    2
+#define LOC_AGPS_RIL_NETWORK_TYPE_MOBILE_SUPL   3
+#define LOC_AGPS_RIL_NETWORK_TTYPE_MOBILE_DUN   4
+#define LOC_AGPS_RIL_NETWORK_TTYPE_MOBILE_HIPRI 5
+#define LOC_AGPS_RIL_NETWORK_TTYPE_WIMAX        6
+
+/* The following typedef together with its constants below are deprecated, and
+ * will be removed in the next release. */
+typedef uint16_t LocGpsClockFlags;
+#define LOC_GPS_CLOCK_HAS_LEAP_SECOND               (1<<0)
+#define LOC_GPS_CLOCK_HAS_TIME_UNCERTAINTY          (1<<1)
+#define LOC_GPS_CLOCK_HAS_FULL_BIAS                 (1<<2)
+#define LOC_GPS_CLOCK_HAS_BIAS                      (1<<3)
+#define LOC_GPS_CLOCK_HAS_BIAS_UNCERTAINTY          (1<<4)
+#define LOC_GPS_CLOCK_HAS_DRIFT                     (1<<5)
+#define LOC_GPS_CLOCK_HAS_DRIFT_UNCERTAINTY         (1<<6)
+
+/**
+ * Flags to indicate what fields in LocGnssClock are valid.
+ */
+typedef uint16_t LocGnssClockFlags;
+/** A valid 'leap second' is stored in the data structure. */
+#define LOC_GNSS_CLOCK_HAS_LEAP_SECOND               (1<<0)
+/** A valid 'time uncertainty' is stored in the data structure. */
+#define LOC_GNSS_CLOCK_HAS_TIME_UNCERTAINTY          (1<<1)
+/** A valid 'full bias' is stored in the data structure. */
+#define LOC_GNSS_CLOCK_HAS_FULL_BIAS                 (1<<2)
+/** A valid 'bias' is stored in the data structure. */
+#define LOC_GNSS_CLOCK_HAS_BIAS                      (1<<3)
+/** A valid 'bias uncertainty' is stored in the data structure. */
+#define LOC_GNSS_CLOCK_HAS_BIAS_UNCERTAINTY          (1<<4)
+/** A valid 'drift' is stored in the data structure. */
+#define LOC_GNSS_CLOCK_HAS_DRIFT                     (1<<5)
+/** A valid 'drift uncertainty' is stored in the data structure. */
+#define LOC_GNSS_CLOCK_HAS_DRIFT_UNCERTAINTY         (1<<6)
+
+/* The following typedef together with its constants below are deprecated, and
+ * will be removed in the next release. */
+typedef uint8_t LocGpsClockType;
+#define LOC_GPS_CLOCK_TYPE_UNKNOWN                  0
+#define LOC_GPS_CLOCK_TYPE_LOCAL_HW_TIME            1
+#define LOC_GPS_CLOCK_TYPE_GPS_TIME                 2
+
+/* The following typedef together with its constants below are deprecated, and
+ * will be removed in the next release. */
+typedef uint32_t LocGpsMeasurementFlags;
+#define LOC_GPS_MEASUREMENT_HAS_SNR                               (1<<0)
+#define LOC_GPS_MEASUREMENT_HAS_ELEVATION                         (1<<1)
+#define LOC_GPS_MEASUREMENT_HAS_ELEVATION_UNCERTAINTY             (1<<2)
+#define LOC_GPS_MEASUREMENT_HAS_AZIMUTH                           (1<<3)
+#define LOC_GPS_MEASUREMENT_HAS_AZIMUTH_UNCERTAINTY               (1<<4)
+#define LOC_GPS_MEASUREMENT_HAS_PSEUDORANGE                       (1<<5)
+#define LOC_GPS_MEASUREMENT_HAS_PSEUDORANGE_UNCERTAINTY           (1<<6)
+#define LOC_GPS_MEASUREMENT_HAS_CODE_PHASE                        (1<<7)
+#define LOC_GPS_MEASUREMENT_HAS_CODE_PHASE_UNCERTAINTY            (1<<8)
+#define LOC_GPS_MEASUREMENT_HAS_CARRIER_FREQUENCY                 (1<<9)
+#define LOC_GPS_MEASUREMENT_HAS_CARRIER_CYCLES                    (1<<10)
+#define LOC_GPS_MEASUREMENT_HAS_CARRIER_PHASE                     (1<<11)
+#define LOC_GPS_MEASUREMENT_HAS_CARRIER_PHASE_UNCERTAINTY         (1<<12)
+#define LOC_GPS_MEASUREMENT_HAS_BIT_NUMBER                        (1<<13)
+#define LOC_GPS_MEASUREMENT_HAS_TIME_FROM_LAST_BIT                (1<<14)
+#define LOC_GPS_MEASUREMENT_HAS_DOPPLER_SHIFT                     (1<<15)
+#define LOC_GPS_MEASUREMENT_HAS_DOPPLER_SHIFT_UNCERTAINTY         (1<<16)
+#define LOC_GPS_MEASUREMENT_HAS_USED_IN_FIX                       (1<<17)
+#define LOC_GPS_MEASUREMENT_HAS_UNCORRECTED_PSEUDORANGE_RATE      (1<<18)
+
+/**
+ * Flags to indicate what fields in LocGnssMeasurement are valid.
+ */
+typedef uint32_t LocGnssMeasurementFlags;
+/** A valid 'snr' is stored in the data structure. */
+#define LOC_GNSS_MEASUREMENT_HAS_SNR                               (1<<0)
+/** A valid 'carrier frequency' is stored in the data structure. */
+#define LOC_GNSS_MEASUREMENT_HAS_CARRIER_FREQUENCY                 (1<<9)
+/** A valid 'carrier cycles' is stored in the data structure. */
+#define LOC_GNSS_MEASUREMENT_HAS_CARRIER_CYCLES                    (1<<10)
+/** A valid 'carrier phase' is stored in the data structure. */
+#define LOC_GNSS_MEASUREMENT_HAS_CARRIER_PHASE                     (1<<11)
+/** A valid 'carrier phase uncertainty' is stored in the data structure. */
+#define LOC_GNSS_MEASUREMENT_HAS_CARRIER_PHASE_UNCERTAINTY         (1<<12)
+
+/* The following typedef together with its constants below are deprecated, and
+ * will be removed in the next release. */
+typedef uint8_t LocGpsLossOfLock;
+#define LOC_GPS_LOSS_OF_LOCK_UNKNOWN                            0
+#define LOC_GPS_LOSS_OF_LOCK_OK                                 1
+#define LOC_GPS_LOSS_OF_LOCK_CYCLE_SLIP                         2
+
+/* The following typedef together with its constants below are deprecated, and
+ * will be removed in the next release. Use LocGnssMultipathIndicator instead.
+ */
+typedef uint8_t LocGpsMultipathIndicator;
+#define LOC_GPS_MULTIPATH_INDICATOR_UNKNOWN                 0
+#define LOC_GPS_MULTIPATH_INDICATOR_DETECTED                1
+#define LOC_GPS_MULTIPATH_INDICATOR_NOT_USED                2
+
+/**
+ * Enumeration of available values for the GNSS Measurement's multipath
+ * indicator.
+ */
+typedef uint8_t LocGnssMultipathIndicator;
+/** The indicator is not available or unknown. */
+#define LOC_GNSS_MULTIPATH_INDICATOR_UNKNOWN                 0
+/** The measurement is indicated to be affected by multipath. */
+#define LOC_GNSS_MULTIPATH_INDICATOR_PRESENT                 1
+/** The measurement is indicated to be not affected by multipath. */
+#define LOC_GNSS_MULTIPATH_INDICATOR_NOT_PRESENT             2
+
+/* The following typedef together with its constants below are deprecated, and
+ * will be removed in the next release. */
+typedef uint16_t LocGpsMeasurementState;
+#define LOC_GPS_MEASUREMENT_STATE_UNKNOWN                   0
+#define LOC_GPS_MEASUREMENT_STATE_CODE_LOCK             (1<<0)
+#define LOC_GPS_MEASUREMENT_STATE_BIT_SYNC              (1<<1)
+#define LOC_GPS_MEASUREMENT_STATE_SUBFRAME_SYNC         (1<<2)
+#define LOC_GPS_MEASUREMENT_STATE_TOW_DECODED           (1<<3)
+#define LOC_GPS_MEASUREMENT_STATE_MSEC_AMBIGUOUS        (1<<4)
+
+/**
+ * Flags indicating the GNSS measurement state.
+ *
+ * The expected behavior here is for GPS HAL to set all the flags that applies.
+ * For example, if the state for a satellite is only C/A code locked and bit
+ * synchronized, and there is still millisecond ambiguity, the state should be
+ * set as:
+ *
+ * LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK | LOC_GNSS_MEASUREMENT_STATE_BIT_SYNC |
+ *         LOC_GNSS_MEASUREMENT_STATE_MSEC_AMBIGUOUS
+ *
+ * If GNSS is still searching for a satellite, the corresponding state should be
+ * set to LOC_GNSS_MEASUREMENT_STATE_UNKNOWN(0).
+ */
+typedef uint32_t LocGnssMeasurementState;
+#define LOC_GNSS_MEASUREMENT_STATE_UNKNOWN                   0
+#define LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK             (1<<0)
+#define LOC_GNSS_MEASUREMENT_STATE_BIT_SYNC              (1<<1)
+#define LOC_GNSS_MEASUREMENT_STATE_SUBFRAME_SYNC         (1<<2)
+#define LOC_GNSS_MEASUREMENT_STATE_TOW_DECODED           (1<<3)
+#define LOC_GNSS_MEASUREMENT_STATE_MSEC_AMBIGUOUS        (1<<4)
+#define LOC_GNSS_MEASUREMENT_STATE_SYMBOL_SYNC           (1<<5)
+#define LOC_GNSS_MEASUREMENT_STATE_GLO_STRING_SYNC       (1<<6)
+#define LOC_GNSS_MEASUREMENT_STATE_GLO_TOD_DECODED       (1<<7)
+#define LOC_GNSS_MEASUREMENT_STATE_BDS_D2_BIT_SYNC       (1<<8)
+#define LOC_GNSS_MEASUREMENT_STATE_BDS_D2_SUBFRAME_SYNC  (1<<9)
+#define LOC_GNSS_MEASUREMENT_STATE_GAL_E1BC_CODE_LOCK    (1<<10)
+#define LOC_GNSS_MEASUREMENT_STATE_GAL_E1C_2ND_CODE_LOCK (1<<11)
+#define LOC_GNSS_MEASUREMENT_STATE_GAL_E1B_PAGE_SYNC     (1<<12)
+#define LOC_GNSS_MEASUREMENT_STATE_SBAS_SYNC             (1<<13)
+
+/* The following typedef together with its constants below are deprecated, and
+ * will be removed in the next release. */
+typedef uint16_t LocGpsAccumulatedDeltaRangeState;
+#define LOC_GPS_ADR_STATE_UNKNOWN                       0
+#define LOC_GPS_ADR_STATE_VALID                     (1<<0)
+#define LOC_GPS_ADR_STATE_RESET                     (1<<1)
+#define LOC_GPS_ADR_STATE_CYCLE_SLIP                (1<<2)
+
+/**
+ * Flags indicating the Accumulated Delta Range's states.
+ */
+typedef uint16_t LocGnssAccumulatedDeltaRangeState;
+#define LOC_GNSS_ADR_STATE_UNKNOWN                       0
+#define LOC_GNSS_ADR_STATE_VALID                     (1<<0)
+#define LOC_GNSS_ADR_STATE_RESET                     (1<<1)
+#define LOC_GNSS_ADR_STATE_CYCLE_SLIP                (1<<2)
+
+#if 0
+/* The following typedef together with its constants below are deprecated, and
+ * will be removed in the next release. */
+typedef uint8_t GpsNavigationMessageType;
+#define GPS_NAVIGATION_MESSAGE_TYPE_UNKNOWN         0
+#define GPS_NAVIGATION_MESSAGE_TYPE_L1CA            1
+#define GPS_NAVIGATION_MESSAGE_TYPE_L2CNAV          2
+#define GPS_NAVIGATION_MESSAGE_TYPE_L5CNAV          3
+#define GPS_NAVIGATION_MESSAGE_TYPE_CNAV2           4
+
+/**
+ * Enumeration of available values to indicate the GNSS Navigation message
+ * types.
+ *
+ * For convenience, first byte is the LocGnssConstellationType on which that signal
+ * is typically transmitted
+ */
+typedef int16_t GnssNavigationMessageType;
+
+#define GNSS_NAVIGATION_MESSAGE_TYPE_UNKNOWN       0
+/** GPS L1 C/A message contained in the structure.  */
+#define GNSS_NAVIGATION_MESSAGE_TYPE_GPS_L1CA      0x0101
+/** GPS L2-CNAV message contained in the structure. */
+#define GNSS_NAVIGATION_MESSAGE_TYPE_GPS_L2CNAV    0x0102
+/** GPS L5-CNAV message contained in the structure. */
+#define GNSS_NAVIGATION_MESSAGE_TYPE_GPS_L5CNAV    0x0103
+/** GPS CNAV-2 message contained in the structure. */
+#define GNSS_NAVIGATION_MESSAGE_TYPE_GPS_CNAV2     0x0104
+/** Glonass L1 CA message contained in the structure. */
+#define GNSS_NAVIGATION_MESSAGE_TYPE_GLO_L1CA      0x0301
+/** Beidou D1 message contained in the structure. */
+#define GNSS_NAVIGATION_MESSAGE_TYPE_BDS_D1        0x0501
+/** Beidou D2 message contained in the structure. */
+#define GNSS_NAVIGATION_MESSAGE_TYPE_BDS_D2        0x0502
+/** Galileo I/NAV message contained in the structure. */
+#define GNSS_NAVIGATION_MESSAGE_TYPE_GAL_I         0x0601
+/** Galileo F/NAV message contained in the structure. */
+#define GNSS_NAVIGATION_MESSAGE_TYPE_GAL_F         0x0602
+
+/**
+ * Status of Navigation Message
+ * When a message is received properly without any parity error in its navigation words, the
+ * status should be set to NAV_MESSAGE_STATUS_PARITY_PASSED. But if a message is received
+ * with words that failed parity check, but GPS is able to correct those words, the status
+ * should be set to NAV_MESSAGE_STATUS_PARITY_REBUILT.
+ * No need to send any navigation message that contains words with parity error and cannot be
+ * corrected.
+ */
+typedef uint16_t NavigationMessageStatus;
+#define NAV_MESSAGE_STATUS_UNKNOWN              0
+#define NAV_MESSAGE_STATUS_PARITY_PASSED   (1<<0)
+#define NAV_MESSAGE_STATUS_PARITY_REBUILT  (1<<1)
+
+/* This constant is deprecated, and will be removed in the next release. */
+#define NAV_MESSAGE_STATUS_UNKONW              0
+#endif
+
+/**
+ * Flags that indicate information about the satellite
+ */
+typedef uint8_t                                 LocGnssSvFlags;
+#define LOC_GNSS_SV_FLAGS_NONE                      0
+#define LOC_GNSS_SV_FLAGS_HAS_EPHEMERIS_DATA        (1 << 0)
+#define LOC_GNSS_SV_FLAGS_HAS_ALMANAC_DATA          (1 << 1)
+#define LOC_GNSS_SV_FLAGS_USED_IN_FIX               (1 << 2)
+
+/**
+ * Constellation type of LocGnssSvInfo
+ */
+typedef uint8_t                         LocGnssConstellationType;
+#define LOC_GNSS_CONSTELLATION_UNKNOWN      0
+#define LOC_GNSS_CONSTELLATION_GPS          1
+#define LOC_GNSS_CONSTELLATION_SBAS         2
+#define LOC_GNSS_CONSTELLATION_GLONASS      3
+#define LOC_GNSS_CONSTELLATION_QZSS         4
+#define LOC_GNSS_CONSTELLATION_BEIDOU       5
+#define LOC_GNSS_CONSTELLATION_GALILEO      6
+
+/**
+ * Name for the GPS XTRA interface.
+ */
+#define LOC_GPS_XTRA_INTERFACE      "gps-xtra"
+
+/**
+ * Name for the GPS DEBUG interface.
+ */
+#define LOC_GPS_DEBUG_INTERFACE      "gps-debug"
+
+/**
+ * Name for the AGPS interface.
+ */
+
+#define LOC_AGPS_INTERFACE      "agps"
+
+/**
+ * Name of the Supl Certificate interface.
+ */
+#define LOC_SUPL_CERTIFICATE_INTERFACE  "supl-certificate"
+
+/**
+ * Name for NI interface
+ */
+#define LOC_GPS_NI_INTERFACE "gps-ni"
+
+/**
+ * Name for the AGPS-RIL interface.
+ */
+#define LOC_AGPS_RIL_INTERFACE      "agps_ril"
+
+/**
+ * Name for the GPS_Geofencing interface.
+ */
+#define LOC_GPS_GEOFENCING_INTERFACE   "gps_geofencing"
+
+/**
+ * Name of the GPS Measurements interface.
+ */
+#define LOC_GPS_MEASUREMENT_INTERFACE   "gps_measurement"
+
+/**
+ * Name of the GPS navigation message interface.
+ */
+#define LOC_GPS_NAVIGATION_MESSAGE_INTERFACE     "gps_navigation_message"
+
+/**
+ * Name of the GNSS/GPS configuration interface.
+ */
+#define LOC_GNSS_CONFIGURATION_INTERFACE     "gnss_configuration"
+
+/** Represents a location. */
+typedef struct {
+    /** set to sizeof(LocGpsLocation) */
+    size_t          size;
+    /** Contains LocGpsLocationFlags bits. */
+    uint16_t        flags;
+    /** Represents latitude in degrees. */
+    double          latitude;
+    /** Represents longitude in degrees. */
+    double          longitude;
+    /**
+     * Represents altitude in meters above the WGS 84 reference ellipsoid.
+     */
+    double          altitude;
+    /** Represents horizontal speed in meters per second. */
+    float           speed;
+    /** Represents heading in degrees. */
+    float           bearing;
+    /** Represents expected accuracy in meters. */
+    float           accuracy;
+    /** Represents the expected vertical uncertainity in meters*/
+    float           vertUncertainity;
+    /** Timestamp for the location fix. */
+    LocGpsUtcTime      timestamp;
+} LocGpsLocation;
+
+/** Represents the status. */
+typedef struct {
+    /** set to sizeof(LocGpsStatus) */
+    size_t          size;
+    LocGpsStatusValue status;
+} LocGpsStatus;
+
+/**
+ * Legacy struct to represents SV information.
+ * Deprecated, to be removed in the next Android release.
+ * Use LocGnssSvInfo instead.
+ */
+typedef struct {
+    /** set to sizeof(LocGpsSvInfo) */
+    size_t          size;
+    /** Pseudo-random number for the SV. */
+    int     prn;
+    /** Signal to noise ratio. */
+    float   snr;
+    /** Elevation of SV in degrees. */
+    float   elevation;
+    /** Azimuth of SV in degrees. */
+    float   azimuth;
+} LocGpsSvInfo;
+
+typedef struct {
+    /** set to sizeof(LocGnssSvInfo) */
+    size_t size;
+
+    /**
+     * Pseudo-random number for the SV, or FCN/OSN number for Glonass. The
+     * distinction is made by looking at constellation field. Values should be
+     * in the range of:
+     *
+     * - GPS:     1-32
+     * - SBAS:    120-151, 183-192
+     * - GLONASS: 1-24, the orbital slot number (OSN), if known.  Or, if not:
+     *            93-106, the frequency channel number (FCN) (-7 to +6) offset by + 100
+     *            i.e. report an FCN of -7 as 93, FCN of 0 as 100, and FCN of +6 as 106.
+     * - QZSS:    193-200
+     * - Galileo: 1-36
+     * - Beidou:  1-37
+     */
+    int16_t svid;
+
+    /**
+     * Defines the constellation of the given SV. Value should be one of those
+     * LOC_GNSS_CONSTELLATION_* constants
+     */
+    LocGnssConstellationType constellation;
+
+    /**
+     * Carrier-to-noise density in dB-Hz, typically in the range [0, 63].
+     * It contains the measured C/N0 value for the signal at the antenna port.
+     *
+     * This is a mandatory value.
+     */
+    float c_n0_dbhz;
+
+    /** Elevation of SV in degrees. */
+    float elevation;
+
+    /** Azimuth of SV in degrees. */
+    float azimuth;
+
+    /**
+     * Contains additional data about the given SV. Value should be one of those
+     * LOC_GNSS_SV_FLAGS_* constants
+     */
+    LocGnssSvFlags flags;
+
+} LocGnssSvInfo;
+
+/**
+ * Legacy struct to represents SV status.
+ * Deprecated, to be removed in the next Android release.
+ * Use LocGnssSvStatus instead.
+ */
+typedef struct {
+    /** set to sizeof(LocGpsSvStatus) */
+    size_t size;
+    int num_svs;
+    LocGpsSvInfo sv_list[LOC_GPS_MAX_SVS];
+    uint32_t ephemeris_mask;
+    uint32_t almanac_mask;
+    uint32_t used_in_fix_mask;
+} LocGpsSvStatus;
+
+/**
+ * Represents SV status.
+ */
+typedef struct {
+    /** set to sizeof(LocGnssSvStatus) */
+    size_t size;
+
+    /** Number of GPS SVs currently visible, refers to the SVs stored in sv_list */
+    int num_svs;
+    /**
+     * Pointer to an array of SVs information for all GNSS constellations,
+     * except GPS, which is reported using sv_list
+     */
+    LocGnssSvInfo gnss_sv_list[LOC_GNSS_MAX_SVS];
+
+} LocGnssSvStatus;
+
+/* CellID for 2G, 3G and LTE, used in AGPS. */
+typedef struct {
+    LocAGpsRefLocationType type;
+    /** Mobile Country Code. */
+    uint16_t mcc;
+    /** Mobile Network Code .*/
+    uint16_t mnc;
+    /** Location Area Code in 2G, 3G and LTE. In 3G lac is discarded. In LTE,
+     * lac is populated with tac, to ensure that we don't break old clients that
+     * might rely in the old (wrong) behavior.
+     */
+    uint16_t lac;
+    /** Cell id in 2G. Utran Cell id in 3G. Cell Global Id EUTRA in LTE. */
+    uint32_t cid;
+    /** Tracking Area Code in LTE. */
+    uint16_t tac;
+    /** Physical Cell id in LTE (not used in 2G and 3G) */
+    uint16_t pcid;
+} LocAGpsRefLocationCellID;
+
+typedef struct {
+    uint8_t mac[6];
+} LocAGpsRefLocationMac;
+
+/** Represents ref locations */
+typedef struct {
+    LocAGpsRefLocationType type;
+    union {
+        LocAGpsRefLocationCellID   cellID;
+        LocAGpsRefLocationMac      mac;
+    } u;
+} LocAGpsRefLocation;
+
+/**
+ * Callback with location information. Can only be called from a thread created
+ * by create_thread_cb.
+ */
+typedef void (* loc_gps_location_callback)(LocGpsLocation* location);
+
+/**
+ * Callback with status information. Can only be called from a thread created by
+ * create_thread_cb.
+ */
+typedef void (* loc_gps_status_callback)(LocGpsStatus* status);
+/**
+ * Legacy callback with SV status information.
+ * Can only be called from a thread created by create_thread_cb.
+ *
+ * This callback is deprecated, and will be removed in the next release. Use
+ * loc_gnss_sv_status_callback() instead.
+ */
+typedef void (* loc_gps_sv_status_callback)(LocGpsSvStatus* sv_info);
+
+/**
+ * Callback with SV status information.
+ * Can only be called from a thread created by create_thread_cb.
+ */
+typedef void (* loc_gnss_sv_status_callback)(LocGnssSvStatus* sv_info);
+
+/**
+ * Callback for reporting NMEA sentences. Can only be called from a thread
+ * created by create_thread_cb.
+ */
+typedef void (* loc_gps_nmea_callback)(LocGpsUtcTime timestamp, const char* nmea, int length);
+
+/**
+ * Callback to inform framework of the GPS engine's capabilities. Capability
+ * parameter is a bit field of LOC_GPS_CAPABILITY_* flags.
+ */
+typedef void (* loc_gps_set_capabilities)(uint32_t capabilities);
+
+/**
+ * Callback utility for acquiring the GPS wakelock. This can be used to prevent
+ * the CPU from suspending while handling GPS events.
+ */
+typedef void (* loc_gps_acquire_wakelock)();
+
+/** Callback utility for releasing the GPS wakelock. */
+typedef void (* loc_gps_release_wakelock)();
+
+/** Callback for requesting NTP time */
+typedef void (* loc_gps_request_utc_time)();
+
+/**
+ * Callback for creating a thread that can call into the Java framework code.
+ * This must be used to create any threads that report events up to the
+ * framework.
+ */
+typedef pthread_t (* loc_gps_create_thread)(const char* name, void (*start)(void *), void* arg);
+
+/**
+ * Provides information about how new the underlying GPS/GNSS hardware and
+ * software is.
+ *
+ * This information will be available for Android Test Applications. If a GPS
+ * HAL does not provide this information, it will be considered "2015 or
+ * earlier".
+ *
+ * If a GPS HAL does provide this information, then newer years will need to
+ * meet newer CTS standards. E.g. if the date are 2016 or above, then N+ level
+ * LocGpsMeasurement support will be verified.
+ */
+typedef struct {
+    /** Set to sizeof(LocGnssSystemInfo) */
+    size_t   size;
+    /* year in which the last update was made to the underlying hardware/firmware
+     * used to capture GNSS signals, e.g. 2016 */
+    uint16_t year_of_hw;
+} LocGnssSystemInfo;
+
+/**
+ * Callback to inform framework of the engine's hardware version information.
+ */
+typedef void (*loc_gnss_set_system_info)(const LocGnssSystemInfo* info);
+
+/** New GPS callback structure. */
+typedef struct {
+    /** set to sizeof(LocGpsCallbacks) */
+    size_t      size;
+    loc_gps_location_callback location_cb;
+    loc_gps_status_callback status_cb;
+    loc_gps_sv_status_callback sv_status_cb;
+    loc_gps_nmea_callback nmea_cb;
+    loc_gps_set_capabilities set_capabilities_cb;
+    loc_gps_acquire_wakelock acquire_wakelock_cb;
+    loc_gps_release_wakelock release_wakelock_cb;
+    loc_gps_create_thread create_thread_cb;
+    loc_gps_request_utc_time request_utc_time_cb;
+
+    loc_gnss_set_system_info set_system_info_cb;
+    loc_gnss_sv_status_callback gnss_sv_status_cb;
+} LocGpsCallbacks;
+
+/** Represents the standard GPS interface. */
+typedef struct {
+    /** set to sizeof(LocGpsInterface) */
+    size_t          size;
+    /**
+     * Opens the interface and provides the callback routines
+     * to the implementation of this interface.
+     */
+    int   (*init)( LocGpsCallbacks* callbacks );
+
+    /** Starts navigating. */
+    int   (*start)( void );
+
+    /** Stops navigating. */
+    int   (*stop)( void );
+
+    /** Closes the interface. */
+    void  (*cleanup)( void );
+
+    /** Injects the current time. */
+    int   (*inject_time)(LocGpsUtcTime time, int64_t timeReference,
+                         int uncertainty);
+
+    /**
+     * Injects current location from another location provider (typically cell
+     * ID). Latitude and longitude are measured in degrees expected accuracy is
+     * measured in meters
+     */
+    int  (*inject_location)(double latitude, double longitude, float accuracy);
+
+    /**
+     * Specifies that the next call to start will not use the
+     * information defined in the flags. LOC_GPS_DELETE_ALL is passed for
+     * a cold start.
+     */
+    void  (*delete_aiding_data)(LocGpsAidingData flags);
+
+    /**
+     * min_interval represents the time between fixes in milliseconds.
+     * preferred_accuracy represents the requested fix accuracy in meters.
+     * preferred_time represents the requested time to first fix in milliseconds.
+     *
+     * 'mode' parameter should be one of LOC_GPS_POSITION_MODE_MS_BASED
+     * or LOC_GPS_POSITION_MODE_STANDALONE.
+     * It is allowed by the platform (and it is recommended) to fallback to
+     * LOC_GPS_POSITION_MODE_MS_BASED if LOC_GPS_POSITION_MODE_MS_ASSISTED is passed in, and
+     * LOC_GPS_POSITION_MODE_MS_BASED is supported.
+     */
+    int   (*set_position_mode)(LocGpsPositionMode mode, LocGpsPositionRecurrence recurrence,
+            uint32_t min_interval, uint32_t preferred_accuracy, uint32_t preferred_time);
+
+    /** Get a pointer to extension information. */
+    const void* (*get_extension)(const char* name);
+} LocGpsInterface;
+
+/**
+ * Callback to request the client to download XTRA data. The client should
+ * download XTRA data and inject it by calling inject_xtra_data(). Can only be
+ * called from a thread created by create_thread_cb.
+ */
+typedef void (* loc_gps_xtra_download_request)();
+
+/** Callback structure for the XTRA interface. */
+typedef struct {
+    loc_gps_xtra_download_request download_request_cb;
+    loc_gps_create_thread create_thread_cb;
+} LocGpsXtraCallbacks;
+
+/** Extended interface for XTRA support. */
+typedef struct {
+    /** set to sizeof(LocGpsXtraInterface) */
+    size_t          size;
+    /**
+     * Opens the XTRA interface and provides the callback routines
+     * to the implementation of this interface.
+     */
+    int  (*init)( LocGpsXtraCallbacks* callbacks );
+    /** Injects XTRA data into the GPS. */
+    int  (*inject_xtra_data)( char* data, int length );
+} LocGpsXtraInterface;
+
+#if 0
+/** Extended interface for DEBUG support. */
+typedef struct {
+    /** set to sizeof(LocGpsDebugInterface) */
+    size_t          size;
+
+    /**
+     * This function should return any information that the native
+     * implementation wishes to include in a bugreport.
+     */
+    size_t (*get_internal_state)(char* buffer, size_t bufferSize);
+} LocGpsDebugInterface;
+#endif
+
+/*
+ * Represents the status of AGPS augmented to support IPv4 and IPv6.
+ */
+typedef struct {
+    /** set to sizeof(LocAGpsStatus) */
+    size_t                  size;
+
+    LocAGpsType                type;
+    LocAGpsStatusValue         status;
+
+    /**
+     * Must be set to a valid IPv4 address if the field 'addr' contains an IPv4
+     * address, or set to INADDR_NONE otherwise.
+     */
+    uint32_t                ipaddr;
+
+    /**
+     * Must contain the IPv4 (AF_INET) or IPv6 (AF_INET6) address to report.
+     * Any other value of addr.ss_family will be rejected.
+     */
+    struct sockaddr_storage addr;
+} LocAGpsStatus;
+
+/**
+ * Callback with AGPS status information. Can only be called from a thread
+ * created by create_thread_cb.
+ */
+typedef void (* loc_agps_status_callback)(LocAGpsStatus* status);
+
+/** Callback structure for the AGPS interface. */
+typedef struct {
+    loc_agps_status_callback status_cb;
+    loc_gps_create_thread create_thread_cb;
+} LocAGpsCallbacks;
+
+/**
+ * Extended interface for AGPS support, it is augmented to enable to pass
+ * extra APN data.
+ */
+typedef struct {
+    /** set to sizeof(LocAGpsInterface) */
+    size_t size;
+
+    /**
+     * Opens the AGPS interface and provides the callback routines to the
+     * implementation of this interface.
+     */
+    void (*init)(LocAGpsCallbacks* callbacks);
+    /**
+     * Deprecated.
+     * If the HAL supports LocAGpsInterface_v2 this API will not be used, see
+     * data_conn_open_with_apn_ip_type for more information.
+     */
+    int (*data_conn_open)(const char* apn);
+    /**
+     * Notifies that the AGPS data connection has been closed.
+     */
+    int (*data_conn_closed)();
+    /**
+     * Notifies that a data connection is not available for AGPS.
+     */
+    int (*data_conn_failed)();
+    /**
+     * Sets the hostname and port for the AGPS server.
+     */
+    int (*set_server)(LocAGpsType type, const char* hostname, int port);
+
+    /**
+     * Notifies that a data connection is available and sets the name of the
+     * APN, and its IP type, to be used for SUPL connections.
+     */
+    int (*data_conn_open_with_apn_ip_type)(
+            const char* apn,
+            LocApnIpType apnIpType);
+} LocAGpsInterface;
+
+/** Error codes associated with certificate operations */
+#define LOC_AGPS_CERTIFICATE_OPERATION_SUCCESS               0
+#define LOC_AGPS_CERTIFICATE_ERROR_GENERIC                -100
+#define LOC_AGPS_CERTIFICATE_ERROR_TOO_MANY_CERTIFICATES  -101
+
+/** A data structure that represents an X.509 certificate using DER encoding */
+typedef struct {
+    size_t  length;
+    u_char* data;
+} LocDerEncodedCertificate;
+
+/**
+ * A type definition for SHA1 Fingerprints used to identify X.509 Certificates
+ * The Fingerprint is a digest of the DER Certificate that uniquely identifies it.
+ */
+typedef struct {
+    u_char data[20];
+} LocSha1CertificateFingerprint;
+
+/** AGPS Interface to handle SUPL certificate operations */
+typedef struct {
+    /** set to sizeof(LocSuplCertificateInterface) */
+    size_t size;
+
+    /**
+     * Installs a set of Certificates used for SUPL connections to the AGPS server.
+     * If needed the HAL should find out internally any certificates that need to be removed to
+     * accommodate the certificates to install.
+     * The certificates installed represent a full set of valid certificates needed to connect to
+     * AGPS SUPL servers.
+     * The list of certificates is required, and all must be available at the same time, when trying
+     * to establish a connection with the AGPS Server.
+     *
+     * Parameters:
+     *      certificates - A pointer to an array of DER encoded certificates that are need to be
+     *                     installed in the HAL.
+     *      length - The number of certificates to install.
+     * Returns:
+     *      LOC_AGPS_CERTIFICATE_OPERATION_SUCCESS if the operation is completed successfully
+     *      LOC_AGPS_CERTIFICATE_ERROR_TOO_MANY_CERTIFICATES if the HAL cannot store the number of
+     *          certificates attempted to be installed, the state of the certificates stored should
+     *          remain the same as before on this error case.
+     *
+     * IMPORTANT:
+     *      If needed the HAL should find out internally the set of certificates that need to be
+     *      removed to accommodate the certificates to install.
+     */
+    int  (*install_certificates) ( const LocDerEncodedCertificate* certificates, size_t length );
+
+    /**
+     * Notifies the HAL that a list of certificates used for SUPL connections are revoked. It is
+     * expected that the given set of certificates is removed from the internal store of the HAL.
+     *
+     * Parameters:
+     *      fingerprints - A pointer to an array of SHA1 Fingerprints to identify the set of
+     *                     certificates to revoke.
+     *      length - The number of fingerprints provided.
+     * Returns:
+     *      LOC_AGPS_CERTIFICATE_OPERATION_SUCCESS if the operation is completed successfully.
+     *
+     * IMPORTANT:
+     *      If any of the certificates provided (through its fingerprint) is not known by the HAL,
+     *      it should be ignored and continue revoking/deleting the rest of them.
+     */
+    int  (*revoke_certificates) ( const LocSha1CertificateFingerprint* fingerprints, size_t length );
+} LocSuplCertificateInterface;
+
+/** Represents an NI request */
+typedef struct {
+    /** set to sizeof(LocGpsNiNotification) */
+    size_t          size;
+
+    /**
+     * An ID generated by HAL to associate NI notifications and UI
+     * responses
+     */
+    int             notification_id;
+
+    /**
+     * An NI type used to distinguish different categories of NI
+     * events, such as LOC_GPS_NI_TYPE_VOICE, LOC_GPS_NI_TYPE_UMTS_SUPL, ...
+     */
+    LocGpsNiType       ni_type;
+
+    /**
+     * Notification/verification options, combinations of LocGpsNiNotifyFlags constants
+     */
+    LocGpsNiNotifyFlags notify_flags;
+
+    /**
+     * Timeout period to wait for user response.
+     * Set to 0 for no time out limit.
+     */
+    int             timeout;
+
+    /**
+     * Default response when time out.
+     */
+    LocGpsUserResponseType default_response;
+
+    /**
+     * Requestor ID
+     */
+    char            requestor_id[LOC_GPS_NI_SHORT_STRING_MAXLEN];
+
+    /**
+     * Notification message. It can also be used to store client_id in some cases
+     */
+    char            text[LOC_GPS_NI_LONG_STRING_MAXLEN];
+
+    /**
+     * Client name decoding scheme
+     */
+    LocGpsNiEncodingType requestor_id_encoding;
+
+    /**
+     * Client name decoding scheme
+     */
+    LocGpsNiEncodingType text_encoding;
+
+    /**
+     * A pointer to extra data. Format:
+     * key_1 = value_1
+     * key_2 = value_2
+     */
+    char           extras[LOC_GPS_NI_LONG_STRING_MAXLEN];
+
+} LocGpsNiNotification;
+
+/**
+ * Callback with NI notification. Can only be called from a thread created by
+ * create_thread_cb.
+ */
+typedef void (*loc_gps_ni_notify_callback)(LocGpsNiNotification *notification);
+
+/** GPS NI callback structure. */
+typedef struct
+{
+    /**
+     * Sends the notification request from HAL to GPSLocationProvider.
+     */
+    loc_gps_ni_notify_callback notify_cb;
+    loc_gps_create_thread create_thread_cb;
+} LocGpsNiCallbacks;
+
+/**
+ * Extended interface for Network-initiated (NI) support.
+ */
+typedef struct
+{
+    /** set to sizeof(LocGpsNiInterface) */
+    size_t          size;
+
+   /** Registers the callbacks for HAL to use. */
+   void (*init) (LocGpsNiCallbacks *callbacks);
+
+   /** Sends a response to HAL. */
+   void (*respond) (int notif_id, LocGpsUserResponseType user_response);
+} LocGpsNiInterface;
+
+#define LOC_AGPS_RIL_REQUEST_SETID_IMSI     (1<<0L)
+#define LOC_AGPS_RIL_REQUEST_SETID_MSISDN   (1<<1L)
+
+#define LOC_AGPS_RIL_REQUEST_REFLOC_CELLID  (1<<0L)
+#define LOC_AGPS_RIL_REQUEST_REFLOC_MAC     (1<<1L)
+
+typedef void (*loc_agps_ril_request_set_id)(uint32_t flags);
+typedef void (*loc_agps_ril_request_ref_loc)(uint32_t flags);
+
+typedef struct {
+    loc_agps_ril_request_set_id request_setid;
+    loc_agps_ril_request_ref_loc request_refloc;
+    loc_gps_create_thread create_thread_cb;
+} LocAGpsRilCallbacks;
+
+/** Extended interface for AGPS_RIL support. */
+typedef struct {
+    /** set to sizeof(LocAGpsRilInterface) */
+    size_t          size;
+    /**
+     * Opens the AGPS interface and provides the callback routines
+     * to the implementation of this interface.
+     */
+    void  (*init)( LocAGpsRilCallbacks* callbacks );
+
+    /**
+     * Sets the reference location.
+     */
+    void (*set_ref_location) (const LocAGpsRefLocation *agps_reflocation, size_t sz_struct);
+    /**
+     * Sets the set ID.
+     */
+    void (*set_set_id) (LocAGpsSetIDType type, const char* setid);
+
+    /**
+     * Send network initiated message.
+     */
+    void (*ni_message) (uint8_t *msg, size_t len);
+
+    /**
+     * Notify GPS of network status changes.
+     * These parameters match values in the android.net.NetworkInfo class.
+     */
+    void (*update_network_state) (int connected, int type, int roaming, const char* extra_info);
+
+    /**
+     * Notify GPS of network status changes.
+     * These parameters match values in the android.net.NetworkInfo class.
+     */
+    void (*update_network_availability) (int avaiable, const char* apn);
+} LocAGpsRilInterface;
+
+/**
+ * GPS Geofence.
+ *      There are 3 states associated with a Geofence: Inside, Outside, Unknown.
+ * There are 3 transitions: ENTERED, EXITED, UNCERTAIN.
+ *
+ * An example state diagram with confidence level: 95% and Unknown time limit
+ * set as 30 secs is shown below. (confidence level and Unknown time limit are
+ * explained latter)
+ *                         ____________________________
+ *                        |       Unknown (30 secs)   |
+ *                         """"""""""""""""""""""""""""
+ *                            ^ |                  |  ^
+ *                   UNCERTAIN| |ENTERED     EXITED|  |UNCERTAIN
+ *                            | v                  v  |
+ *                        ________    EXITED     _________
+ *                       | Inside | -----------> | Outside |
+ *                       |        | <----------- |         |
+ *                        """"""""    ENTERED    """""""""
+ *
+ * Inside state: We are 95% confident that the user is inside the geofence.
+ * Outside state: We are 95% confident that the user is outside the geofence
+ * Unknown state: Rest of the time.
+ *
+ * The Unknown state is better explained with an example:
+ *
+ *                            __________
+ *                           |         c|
+ *                           |  ___     |    _______
+ *                           |  |a|     |   |   b   |
+ *                           |  """     |    """""""
+ *                           |          |
+ *                            """"""""""
+ * In the diagram above, "a" and "b" are 2 geofences and "c" is the accuracy
+ * circle reported by the GPS subsystem. Now with regard to "b", the system is
+ * confident that the user is outside. But with regard to "a" is not confident
+ * whether it is inside or outside the geofence. If the accuracy remains the
+ * same for a sufficient period of time, the UNCERTAIN transition would be
+ * triggered with the state set to Unknown. If the accuracy improves later, an
+ * appropriate transition should be triggered.  This "sufficient period of time"
+ * is defined by the parameter in the add_geofence_area API.
+ *     In other words, Unknown state can be interpreted as a state in which the
+ * GPS subsystem isn't confident enough that the user is either inside or
+ * outside the Geofence. It moves to Unknown state only after the expiry of the
+ * timeout.
+ *
+ * The geofence callback needs to be triggered for the ENTERED and EXITED
+ * transitions, when the GPS system is confident that the user has entered
+ * (Inside state) or exited (Outside state) the Geofence. An implementation
+ * which uses a value of 95% as the confidence is recommended. The callback
+ * should be triggered only for the transitions requested by the
+ * add_geofence_area call.
+ *
+ * Even though the diagram and explanation talks about states and transitions,
+ * the callee is only interested in the transistions. The states are mentioned
+ * here for illustrative purposes.
+ *
+ * Startup Scenario: When the device boots up, if an application adds geofences,
+ * and then we get an accurate GPS location fix, it needs to trigger the
+ * appropriate (ENTERED or EXITED) transition for every Geofence it knows about.
+ * By default, all the Geofences will be in the Unknown state.
+ *
+ * When the GPS system is unavailable, loc_gps_geofence_status_callback should be
+ * called to inform the upper layers of the same. Similarly, when it becomes
+ * available the callback should be called. This is a global state while the
+ * UNKNOWN transition described above is per geofence.
+ *
+ * An important aspect to note is that users of this API (framework), will use
+ * other subsystems like wifi, sensors, cell to handle Unknown case and
+ * hopefully provide a definitive state transition to the third party
+ * application. GPS Geofence will just be a signal indicating what the GPS
+ * subsystem knows about the Geofence.
+ *
+ */
+#define LOC_GPS_GEOFENCE_ENTERED     (1<<0L)
+#define LOC_GPS_GEOFENCE_EXITED      (1<<1L)
+#define LOC_GPS_GEOFENCE_UNCERTAIN   (1<<2L)
+
+#define LOC_GPS_GEOFENCE_UNAVAILABLE (1<<0L)
+#define LOC_GPS_GEOFENCE_AVAILABLE   (1<<1L)
+
+#define LOC_GPS_GEOFENCE_OPERATION_SUCCESS           0
+#define LOC_GPS_GEOFENCE_ERROR_TOO_MANY_GEOFENCES -100
+#define LOC_GPS_GEOFENCE_ERROR_ID_EXISTS          -101
+#define LOC_GPS_GEOFENCE_ERROR_ID_UNKNOWN         -102
+#define LOC_GPS_GEOFENCE_ERROR_INVALID_TRANSITION -103
+#define LOC_GPS_GEOFENCE_ERROR_GENERIC            -149
+
+/**
+ * The callback associated with the geofence.
+ * Parameters:
+ *      geofence_id - The id associated with the add_geofence_area.
+ *      location    - The current GPS location.
+ *      transition  - Can be one of LOC_GPS_GEOFENCE_ENTERED, LOC_GPS_GEOFENCE_EXITED,
+ *                    LOC_GPS_GEOFENCE_UNCERTAIN.
+ *      timestamp   - Timestamp when the transition was detected.
+ *
+ * The callback should only be called when the caller is interested in that
+ * particular transition. For instance, if the caller is interested only in
+ * ENTERED transition, then the callback should NOT be called with the EXITED
+ * transition.
+ *
+ * IMPORTANT: If a transition is triggered resulting in this callback, the GPS
+ * subsystem will wake up the application processor, if its in suspend state.
+ */
+typedef void (*loc_gps_geofence_transition_callback) (int32_t geofence_id,  LocGpsLocation* location,
+        int32_t transition, LocGpsUtcTime timestamp);
+
+/**
+ * The callback associated with the availability of the GPS system for geofencing
+ * monitoring. If the GPS system determines that it cannot monitor geofences
+ * because of lack of reliability or unavailability of the GPS signals, it will
+ * call this callback with LOC_GPS_GEOFENCE_UNAVAILABLE parameter.
+ *
+ * Parameters:
+ *  status - LOC_GPS_GEOFENCE_UNAVAILABLE or LOC_GPS_GEOFENCE_AVAILABLE.
+ *  last_location - Last known location.
+ */
+typedef void (*loc_gps_geofence_status_callback) (int32_t status, LocGpsLocation* last_location);
+
+/**
+ * The callback associated with the add_geofence call.
+ *
+ * Parameter:
+ * geofence_id - Id of the geofence.
+ * status - LOC_GPS_GEOFENCE_OPERATION_SUCCESS
+ *          LOC_GPS_GEOFENCE_ERROR_TOO_MANY_GEOFENCES  - geofence limit has been reached.
+ *          LOC_GPS_GEOFENCE_ERROR_ID_EXISTS  - geofence with id already exists
+ *          LOC_GPS_GEOFENCE_ERROR_INVALID_TRANSITION - the monitorTransition contains an
+ *              invalid transition
+ *          LOC_GPS_GEOFENCE_ERROR_GENERIC - for other errors.
+ */
+typedef void (*loc_gps_geofence_add_callback) (int32_t geofence_id, int32_t status);
+
+/**
+ * The callback associated with the remove_geofence call.
+ *
+ * Parameter:
+ * geofence_id - Id of the geofence.
+ * status - LOC_GPS_GEOFENCE_OPERATION_SUCCESS
+ *          LOC_GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id
+ *          LOC_GPS_GEOFENCE_ERROR_GENERIC for others.
+ */
+typedef void (*loc_gps_geofence_remove_callback) (int32_t geofence_id, int32_t status);
+
+
+/**
+ * The callback associated with the pause_geofence call.
+ *
+ * Parameter:
+ * geofence_id - Id of the geofence.
+ * status - LOC_GPS_GEOFENCE_OPERATION_SUCCESS
+ *          LOC_GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id
+ *          LOC_GPS_GEOFENCE_ERROR_INVALID_TRANSITION -
+ *                    when monitor_transitions is invalid
+ *          LOC_GPS_GEOFENCE_ERROR_GENERIC for others.
+ */
+typedef void (*loc_gps_geofence_pause_callback) (int32_t geofence_id, int32_t status);
+
+/**
+ * The callback associated with the resume_geofence call.
+ *
+ * Parameter:
+ * geofence_id - Id of the geofence.
+ * status - LOC_GPS_GEOFENCE_OPERATION_SUCCESS
+ *          LOC_GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id
+ *          LOC_GPS_GEOFENCE_ERROR_GENERIC for others.
+ */
+typedef void (*loc_gps_geofence_resume_callback) (int32_t geofence_id, int32_t status);
+
+typedef struct {
+    loc_gps_geofence_transition_callback geofence_transition_callback;
+    loc_gps_geofence_status_callback geofence_status_callback;
+    loc_gps_geofence_add_callback geofence_add_callback;
+    loc_gps_geofence_remove_callback geofence_remove_callback;
+    loc_gps_geofence_pause_callback geofence_pause_callback;
+    loc_gps_geofence_resume_callback geofence_resume_callback;
+    loc_gps_create_thread create_thread_cb;
+} LocGpsGeofenceCallbacks;
+
+/** Extended interface for GPS_Geofencing support */
+typedef struct {
+   /** set to sizeof(LocGpsGeofencingInterface) */
+   size_t          size;
+
+   /**
+    * Opens the geofence interface and provides the callback routines
+    * to the implementation of this interface.
+    */
+   void  (*init)( LocGpsGeofenceCallbacks* callbacks );
+
+   /**
+    * Add a geofence area. This api currently supports circular geofences.
+    * Parameters:
+    *    geofence_id - The id for the geofence. If a geofence with this id
+    *       already exists, an error value (LOC_GPS_GEOFENCE_ERROR_ID_EXISTS)
+    *       should be returned.
+    *    latitude, longtitude, radius_meters - The lat, long and radius
+    *       (in meters) for the geofence
+    *    last_transition - The current state of the geofence. For example, if
+    *       the system already knows that the user is inside the geofence,
+    *       this will be set to LOC_GPS_GEOFENCE_ENTERED. In most cases, it
+    *       will be LOC_GPS_GEOFENCE_UNCERTAIN.
+    *    monitor_transition - Which transitions to monitor. Bitwise OR of
+    *       LOC_GPS_GEOFENCE_ENTERED, LOC_GPS_GEOFENCE_EXITED and
+    *       LOC_GPS_GEOFENCE_UNCERTAIN.
+    *    notification_responsiveness_ms - Defines the best-effort description
+    *       of how soon should the callback be called when the transition
+    *       associated with the Geofence is triggered. For instance, if set
+    *       to 1000 millseconds with LOC_GPS_GEOFENCE_ENTERED, the callback
+    *       should be called 1000 milliseconds within entering the geofence.
+    *       This parameter is defined in milliseconds.
+    *       NOTE: This is not to be confused with the rate that the GPS is
+    *       polled at. It is acceptable to dynamically vary the rate of
+    *       sampling the GPS for power-saving reasons; thus the rate of
+    *       sampling may be faster or slower than this.
+    *    unknown_timer_ms - The time limit after which the UNCERTAIN transition
+    *       should be triggered. This parameter is defined in milliseconds.
+    *       See above for a detailed explanation.
+    */
+   void (*add_geofence_area) (int32_t geofence_id, double latitude, double longitude,
+       double radius_meters, int last_transition, int monitor_transitions,
+       int notification_responsiveness_ms, int unknown_timer_ms);
+
+   /**
+    * Pause monitoring a particular geofence.
+    * Parameters:
+    *   geofence_id - The id for the geofence.
+    */
+   void (*pause_geofence) (int32_t geofence_id);
+
+   /**
+    * Resume monitoring a particular geofence.
+    * Parameters:
+    *   geofence_id - The id for the geofence.
+    *   monitor_transitions - Which transitions to monitor. Bitwise OR of
+    *       LOC_GPS_GEOFENCE_ENTERED, LOC_GPS_GEOFENCE_EXITED and
+    *       LOC_GPS_GEOFENCE_UNCERTAIN.
+    *       This supersedes the value associated provided in the
+    *       add_geofence_area call.
+    */
+   void (*resume_geofence) (int32_t geofence_id, int monitor_transitions);
+
+   /**
+    * Remove a geofence area. After the function returns, no notifications
+    * should be sent.
+    * Parameter:
+    *   geofence_id - The id for the geofence.
+    */
+   void (*remove_geofence_area) (int32_t geofence_id);
+} LocGpsGeofencingInterface;
+
+/**
+ * Legacy struct to represent an estimate of the GPS clock time.
+ * Deprecated, to be removed in the next Android release.
+ * Use LocGnssClock instead.
+ */
+typedef struct {
+    /** set to sizeof(LocGpsClock) */
+    size_t size;
+    LocGpsClockFlags flags;
+    int16_t leap_second;
+    LocGpsClockType type;
+    int64_t time_ns;
+    double time_uncertainty_ns;
+    int64_t full_bias_ns;
+    double bias_ns;
+    double bias_uncertainty_ns;
+    double drift_nsps;
+    double drift_uncertainty_nsps;
+} LocGpsClock;
+
+/**
+ * Represents an estimate of the GPS clock time.
+ */
+typedef struct {
+    /** set to sizeof(LocGnssClock) */
+    size_t size;
+
+    /**
+     * A set of flags indicating the validity of the fields in this data
+     * structure.
+     */
+    LocGnssClockFlags flags;
+
+    /**
+     * Leap second data.
+     * The sign of the value is defined by the following equation:
+     *      utc_time_ns = time_ns - (full_bias_ns + bias_ns) - leap_second *
+     *      1,000,000,000
+     *
+     * If the data is available 'flags' must contain LOC_GNSS_CLOCK_HAS_LEAP_SECOND.
+     */
+    int16_t leap_second;
+
+    /**
+     * The GNSS receiver internal clock value. This is the local hardware clock
+     * value.
+     *
+     * For local hardware clock, this value is expected to be monotonically
+     * increasing while the hardware clock remains power on. (For the case of a
+     * HW clock that is not continuously on, see the
+     * hw_clock_discontinuity_count field). The receiver's estimate of GPS time
+     * can be derived by substracting the sum of full_bias_ns and bias_ns (when
+     * available) from this value.
+     *
+     * This GPS time is expected to be the best estimate of current GPS time
+     * that GNSS receiver can achieve.
+     *
+     * Sub-nanosecond accuracy can be provided by means of the 'bias_ns' field.
+     * The value contains the 'time uncertainty' in it.
+     *
+     * This field is mandatory.
+     */
+    int64_t time_ns;
+
+    /**
+     * 1-Sigma uncertainty associated with the clock's time in nanoseconds.
+     * The uncertainty is represented as an absolute (single sided) value.
+     *
+     * If the data is available, 'flags' must contain
+     * LOC_GNSS_CLOCK_HAS_TIME_UNCERTAINTY. This value is effectively zero (it is
+     * the reference local clock, by which all other times and time
+     * uncertainties are measured.)  (And thus this field can be not provided,
+     * per LOC_GNSS_CLOCK_HAS_TIME_UNCERTAINTY flag, or provided & set to 0.)
+     */
+    double time_uncertainty_ns;
+
+    /**
+     * The difference between hardware clock ('time' field) inside GPS receiver
+     * and the true GPS time since 0000Z, January 6, 1980, in nanoseconds.
+     *
+     * The sign of the value is defined by the following equation:
+     *      local estimate of GPS time = time_ns - (full_bias_ns + bias_ns)
+     *
+     * This value is mandatory if the receiver has estimated GPS time. If the
+     * computed time is for a non-GPS constellation, the time offset of that
+     * constellation to GPS has to be applied to fill this value. The error
+     * estimate for the sum of this and the bias_ns is the bias_uncertainty_ns,
+     * and the caller is responsible for using this uncertainty (it can be very
+     * large before the GPS time has been solved for.) If the data is available
+     * 'flags' must contain LOC_GNSS_CLOCK_HAS_FULL_BIAS.
+     */
+    int64_t full_bias_ns;
+
+    /**
+     * Sub-nanosecond bias.
+     * The error estimate for the sum of this and the full_bias_ns is the
+     * bias_uncertainty_ns
+     *
+     * If the data is available 'flags' must contain LOC_GNSS_CLOCK_HAS_BIAS. If GPS
+     * has computed a position fix. This value is mandatory if the receiver has
+     * estimated GPS time.
+     */
+    double bias_ns;
+
+    /**
+     * 1-Sigma uncertainty associated with the local estimate of GPS time (clock
+     * bias) in nanoseconds. The uncertainty is represented as an absolute
+     * (single sided) value.
+     *
+     * If the data is available 'flags' must contain
+     * LOC_GNSS_CLOCK_HAS_BIAS_UNCERTAINTY. This value is mandatory if the receiver
+     * has estimated GPS time.
+     */
+    double bias_uncertainty_ns;
+
+    /**
+     * The clock's drift in nanoseconds (per second).
+     *
+     * A positive value means that the frequency is higher than the nominal
+     * frequency, and that the (full_bias_ns + bias_ns) is growing more positive
+     * over time.
+     *
+     * The value contains the 'drift uncertainty' in it.
+     * If the data is available 'flags' must contain LOC_GNSS_CLOCK_HAS_DRIFT.
+     *
+     * This value is mandatory if the receiver has estimated GNSS time
+     */
+    double drift_nsps;
+
+    /**
+     * 1-Sigma uncertainty associated with the clock's drift in nanoseconds (per second).
+     * The uncertainty is represented as an absolute (single sided) value.
+     *
+     * If the data is available 'flags' must contain
+     * LOC_GNSS_CLOCK_HAS_DRIFT_UNCERTAINTY. If GPS has computed a position fix this
+     * field is mandatory and must be populated.
+     */
+    double drift_uncertainty_nsps;
+
+    /**
+     * When there are any discontinuities in the HW clock, this field is
+     * mandatory.
+     *
+     * A "discontinuity" is meant to cover the case of a switch from one source
+     * of clock to another.  A single free-running crystal oscillator (XO)
+     * should generally not have any discontinuities, and this can be set and
+     * left at 0.
+     *
+     * If, however, the time_ns value (HW clock) is derived from a composite of
+     * sources, that is not as smooth as a typical XO, or is otherwise stopped &
+     * restarted, then this value shall be incremented each time a discontinuity
+     * occurs.  (E.g. this value may start at zero at device boot-up and
+     * increment each time there is a change in clock continuity. In the
+     * unlikely event that this value reaches full scale, rollover (not
+     * clamping) is required, such that this value continues to change, during
+     * subsequent discontinuity events.)
+     *
+     * While this number stays the same, between LocGnssClock reports, it can be
+     * safely assumed that the time_ns value has been running continuously, e.g.
+     * derived from a single, high quality clock (XO like, or better, that's
+     * typically used during continuous GNSS signal sampling.)
+     *
+     * It is expected, esp. during periods where there are few GNSS signals
+     * available, that the HW clock be discontinuity-free as long as possible,
+     * as this avoids the need to use (waste) a GNSS measurement to fully
+     * re-solve for the GPS clock bias and drift, when using the accompanying
+     * measurements, from consecutive LocGnssData reports.
+     */
+    uint32_t hw_clock_discontinuity_count;
+
+} LocGnssClock;
+
+/**
+ * Legacy struct to represent a GPS Measurement, it contains raw and computed
+ * information.
+ * Deprecated, to be removed in the next Android release.
+ * Use LocGnssMeasurement instead.
+ */
+typedef struct {
+    /** set to sizeof(LocGpsMeasurement) */
+    size_t size;
+    LocGpsMeasurementFlags flags;
+    int8_t prn;
+    double time_offset_ns;
+    LocGpsMeasurementState state;
+    int64_t received_gps_tow_ns;
+    int64_t received_gps_tow_uncertainty_ns;
+    double c_n0_dbhz;
+    double pseudorange_rate_mps;
+    double pseudorange_rate_uncertainty_mps;
+    LocGpsAccumulatedDeltaRangeState accumulated_delta_range_state;
+    double accumulated_delta_range_m;
+    double accumulated_delta_range_uncertainty_m;
+    double pseudorange_m;
+    double pseudorange_uncertainty_m;
+    double code_phase_chips;
+    double code_phase_uncertainty_chips;
+    float carrier_frequency_hz;
+    int64_t carrier_cycles;
+    double carrier_phase;
+    double carrier_phase_uncertainty;
+    LocGpsLossOfLock loss_of_lock;
+    int32_t bit_number;
+    int16_t time_from_last_bit_ms;
+    double doppler_shift_hz;
+    double doppler_shift_uncertainty_hz;
+    LocGpsMultipathIndicator multipath_indicator;
+    double snr_db;
+    double elevation_deg;
+    double elevation_uncertainty_deg;
+    double azimuth_deg;
+    double azimuth_uncertainty_deg;
+    bool used_in_fix;
+} LocGpsMeasurement;
+
+/**
+ * Represents a GNSS Measurement, it contains raw and computed information.
+ *
+ * Independence - All signal measurement information (e.g. sv_time,
+ * pseudorange_rate, multipath_indicator) reported in this struct should be
+ * based on GNSS signal measurements only. You may not synthesize measurements
+ * by calculating or reporting expected measurements based on known or estimated
+ * position, velocity, or time.
+ */
+typedef struct {
+    /** set to sizeof(LocGnssMeasurement) */
+    size_t size;
+
+    /** A set of flags indicating the validity of the fields in this data structure. */
+    LocGnssMeasurementFlags flags;
+
+    /**
+     * Satellite vehicle ID number, as defined in LocGnssSvInfo::svid
+     * This is a mandatory value.
+     */
+    int16_t svid;
+
+    /**
+     * Defines the constellation of the given SV. Value should be one of those
+     * LOC_GNSS_CONSTELLATION_* constants
+     */
+    LocGnssConstellationType constellation;
+
+    /**
+     * Time offset at which the measurement was taken in nanoseconds.
+     * The reference receiver's time is specified by LocGpsData::clock::time_ns and should be
+     * interpreted in the same way as indicated by LocGpsClock::type.
+     *
+     * The sign of time_offset_ns is given by the following equation:
+     *      measurement time = LocGpsClock::time_ns + time_offset_ns
+     *
+     * It provides an individual time-stamp for the measurement, and allows sub-nanosecond accuracy.
+     * This is a mandatory value.
+     */
+    double time_offset_ns;
+
+    /**
+     * Per satellite sync state. It represents the current sync state for the associated satellite.
+     * Based on the sync state, the 'received GPS tow' field should be interpreted accordingly.
+     *
+     * This is a mandatory value.
+     */
+    LocGnssMeasurementState state;
+
+    /**
+     * The received GNSS Time-of-Week at the measurement time, in nanoseconds.
+     * Ensure that this field is independent (see comment at top of
+     * LocGnssMeasurement struct.)
+     *
+     * For GPS & QZSS, this is:
+     *   Received GPS Time-of-Week at the measurement time, in nanoseconds.
+     *   The value is relative to the beginning of the current GPS week.
+     *
+     *   Given the highest sync state that can be achieved, per each satellite, valid range
+     *   for this field can be:
+     *     Searching       : [ 0       ]   : LOC_GNSS_MEASUREMENT_STATE_UNKNOWN
+     *     C/A code lock   : [ 0   1ms ]   : LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK is set
+     *     Bit sync        : [ 0  20ms ]   : LOC_GNSS_MEASUREMENT_STATE_BIT_SYNC is set
+     *     Subframe sync   : [ 0    6s ]   : LOC_GNSS_MEASUREMENT_STATE_SUBFRAME_SYNC is set
+     *     TOW decoded     : [ 0 1week ]   : LOC_GNSS_MEASUREMENT_STATE_TOW_DECODED is set
+     *
+     *   Note well: if there is any ambiguity in integer millisecond,
+     *   LOC_GNSS_MEASUREMENT_STATE_MSEC_AMBIGUOUS should be set accordingly, in the 'state' field.
+     *
+     *   This value must be populated if 'state' != LOC_GNSS_MEASUREMENT_STATE_UNKNOWN.
+     *
+     * For Glonass, this is:
+     *   Received Glonass time of day, at the measurement time in nanoseconds.
+     *
+     *   Given the highest sync state that can be achieved, per each satellite, valid range for
+     *   this field can be:
+     *     Searching       : [ 0       ]   : LOC_GNSS_MEASUREMENT_STATE_UNKNOWN
+     *     C/A code lock   : [ 0   1ms ]   : LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK is set
+     *     Symbol sync     : [ 0  10ms ]   : LOC_GNSS_MEASUREMENT_STATE_SYMBOL_SYNC is set
+     *     Bit sync        : [ 0  20ms ]   : LOC_GNSS_MEASUREMENT_STATE_BIT_SYNC is set
+     *     String sync     : [ 0    2s ]   : LOC_GNSS_MEASUREMENT_STATE_GLO_STRING_SYNC is set
+     *     Time of day     : [ 0  1day ]   : LOC_GNSS_MEASUREMENT_STATE_GLO_TOD_DECODED is set
+     *
+     * For Beidou, this is:
+     *   Received Beidou time of week, at the measurement time in nanoseconds.
+     *
+     *   Given the highest sync state that can be achieved, per each satellite, valid range for
+     *   this field can be:
+     *     Searching    : [ 0       ] : LOC_GNSS_MEASUREMENT_STATE_UNKNOWN
+     *     C/A code lock: [ 0   1ms ] : LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK is set
+     *     Bit sync (D2): [ 0   2ms ] : LOC_GNSS_MEASUREMENT_STATE_BDS_D2_BIT_SYNC is set
+     *     Bit sync (D1): [ 0  20ms ] : LOC_GNSS_MEASUREMENT_STATE_BIT_SYNC is set
+     *     Subframe (D2): [ 0  0.6s ] : LOC_GNSS_MEASUREMENT_STATE_BDS_D2_SUBFRAME_SYNC is set
+     *     Subframe (D1): [ 0    6s ] : LOC_GNSS_MEASUREMENT_STATE_SUBFRAME_SYNC is set
+     *     Time of week : [ 0 1week ] : LOC_GNSS_MEASUREMENT_STATE_TOW_DECODED is set
+     *
+     * For Galileo, this is:
+     *   Received Galileo time of week, at the measurement time in nanoseconds.
+     *
+     *     E1BC code lock   : [ 0   4ms ]   : LOC_GNSS_MEASUREMENT_STATE_GAL_E1BC_CODE_LOCK is set
+     *     E1C 2nd code lock: [ 0 100ms ]   :
+     *     LOC_GNSS_MEASUREMENT_STATE_GAL_E1C_2ND_CODE_LOCK is set
+     *
+     *     E1B page    : [ 0    2s ] : LOC_GNSS_MEASUREMENT_STATE_GAL_E1B_PAGE_SYNC is set
+     *     Time of week: [ 0 1week ] : LOC_GNSS_MEASUREMENT_STATE_TOW_DECODED is set
+     *
+     * For SBAS, this is:
+     *   Received SBAS time, at the measurement time in nanoseconds.
+     *
+     *   Given the highest sync state that can be achieved, per each satellite,
+     *   valid range for this field can be:
+     *     Searching    : [ 0     ] : LOC_GNSS_MEASUREMENT_STATE_UNKNOWN
+     *     C/A code lock: [ 0 1ms ] : LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK is set
+     *     Symbol sync  : [ 0 2ms ] : LOC_GNSS_MEASUREMENT_STATE_SYMBOL_SYNC is set
+     *     Message      : [ 0  1s ] : LOC_GNSS_MEASUREMENT_STATE_SBAS_SYNC is set
+    */
+    int64_t received_sv_time_in_ns;
+
+    /**
+     * 1-Sigma uncertainty of the Received GPS Time-of-Week in nanoseconds.
+     *
+     * This value must be populated if 'state' != LOC_GPS_MEASUREMENT_STATE_UNKNOWN.
+     */
+    int64_t received_sv_time_uncertainty_in_ns;
+
+    /**
+     * Carrier-to-noise density in dB-Hz, typically in the range [0, 63].
+     * It contains the measured C/N0 value for the signal at the antenna port.
+     *
+     * This is a mandatory value.
+     */
+    double c_n0_dbhz;
+
+    /**
+     * Pseudorange rate at the timestamp in m/s. The correction of a given
+     * Pseudorange Rate value includes corrections for receiver and satellite
+     * clock frequency errors. Ensure that this field is independent (see
+     * comment at top of LocGnssMeasurement struct.)
+     *
+     * It is mandatory to provide the 'uncorrected' 'pseudorange rate', and provide LocGpsClock's
+     * 'drift' field as well (When providing the uncorrected pseudorange rate, do not apply the
+     * corrections described above.)
+     *
+     * The value includes the 'pseudorange rate uncertainty' in it.
+     * A positive 'uncorrected' value indicates that the SV is moving away from the receiver.
+     *
+     * The sign of the 'uncorrected' 'pseudorange rate' and its relation to the sign of 'doppler
+     * shift' is given by the equation:
+     *      pseudorange rate = -k * doppler shift   (where k is a constant)
+     *
+     * This should be the most accurate pseudorange rate available, based on
+     * fresh signal measurements from this channel.
+     *
+     * It is mandatory that this value be provided at typical carrier phase PRR
+     * quality (few cm/sec per second of uncertainty, or better) - when signals
+     * are sufficiently strong & stable, e.g. signals from a GPS simulator at >=
+     * 35 dB-Hz.
+     */
+    double pseudorange_rate_mps;
+
+    /**
+     * 1-Sigma uncertainty of the pseudorange_rate_mps.
+     * The uncertainty is represented as an absolute (single sided) value.
+     *
+     * This is a mandatory value.
+     */
+    double pseudorange_rate_uncertainty_mps;
+
+    /**
+     * Accumulated delta range's state. It indicates whether ADR is reset or there is a cycle slip
+     * (indicating loss of lock).
+     *
+     * This is a mandatory value.
+     */
+    LocGnssAccumulatedDeltaRangeState accumulated_delta_range_state;
+
+    /**
+     * Accumulated delta range since the last channel reset in meters.
+     * A positive value indicates that the SV is moving away from the receiver.
+     *
+     * The sign of the 'accumulated delta range' and its relation to the sign of 'carrier phase'
+     * is given by the equation:
+     *          accumulated delta range = -k * carrier phase    (where k is a constant)
+     *
+     * This value must be populated if 'accumulated delta range state' != LOC_GPS_ADR_STATE_UNKNOWN.
+     * However, it is expected that the data is only accurate when:
+     *      'accumulated delta range state' == LOC_GPS_ADR_STATE_VALID.
+     */
+    double accumulated_delta_range_m;
+
+    /**
+     * 1-Sigma uncertainty of the accumulated delta range in meters.
+     * This value must be populated if 'accumulated delta range state' != LOC_GPS_ADR_STATE_UNKNOWN.
+     */
+    double accumulated_delta_range_uncertainty_m;
+
+    /**
+     * Carrier frequency at which codes and messages are modulated, it can be L1 or L2.
+     * If the field is not set, the carrier frequency is assumed to be L1.
+     *
+     * If the data is available, 'flags' must contain
+     * LOC_GNSS_MEASUREMENT_HAS_CARRIER_FREQUENCY.
+     */
+    float carrier_frequency_hz;
+
+    /**
+     * The number of full carrier cycles between the satellite and the receiver.
+     * The reference frequency is given by the field 'carrier_frequency_hz'.
+     * Indications of possible cycle slips and resets in the accumulation of
+     * this value can be inferred from the accumulated_delta_range_state flags.
+     *
+     * If the data is available, 'flags' must contain
+     * LOC_GNSS_MEASUREMENT_HAS_CARRIER_CYCLES.
+     */
+    int64_t carrier_cycles;
+
+    /**
+     * The RF phase detected by the receiver, in the range [0.0, 1.0].
+     * This is usually the fractional part of the complete carrier phase measurement.
+     *
+     * The reference frequency is given by the field 'carrier_frequency_hz'.
+     * The value contains the 'carrier-phase uncertainty' in it.
+     *
+     * If the data is available, 'flags' must contain
+     * LOC_GNSS_MEASUREMENT_HAS_CARRIER_PHASE.
+     */
+    double carrier_phase;
+
+    /**
+     * 1-Sigma uncertainty of the carrier-phase.
+     * If the data is available, 'flags' must contain
+     * LOC_GNSS_MEASUREMENT_HAS_CARRIER_PHASE_UNCERTAINTY.
+     */
+    double carrier_phase_uncertainty;
+
+    /**
+     * An enumeration that indicates the 'multipath' state of the event.
+     *
+     * The multipath Indicator is intended to report the presence of overlapping
+     * signals that manifest as distorted correlation peaks.
+     *
+     * - if there is a distorted correlation peak shape, report that multipath
+     *   is LOC_GNSS_MULTIPATH_INDICATOR_PRESENT.
+     * - if there is not a distorted correlation peak shape, report
+     *   LOC_GNSS_MULTIPATH_INDICATOR_NOT_PRESENT
+     * - if signals are too weak to discern this information, report
+     *   LOC_GNSS_MULTIPATH_INDICATOR_UNKNOWN
+     *
+     * Example: when doing the standardized overlapping Multipath Performance
+     * test (3GPP TS 34.171) the Multipath indicator should report
+     * LOC_GNSS_MULTIPATH_INDICATOR_PRESENT for those signals that are tracked, and
+     * contain multipath, and LOC_GNSS_MULTIPATH_INDICATOR_NOT_PRESENT for those
+     * signals that are tracked and do not contain multipath.
+     */
+    LocGnssMultipathIndicator multipath_indicator;
+
+    /**
+     * Signal-to-noise ratio at correlator output in dB.
+     * If the data is available, 'flags' must contain LOC_GNSS_MEASUREMENT_HAS_SNR.
+     * This is the power ratio of the "correlation peak height above the
+     * observed noise floor" to "the noise RMS".
+     */
+    double snr_db;
+} LocGnssMeasurement;
+
+/**
+ * Legacy struct to represents a reading of GPS measurements.
+ * Deprecated, to be removed in the next Android release.
+ * Use LocGnssData instead.
+ */
+typedef struct {
+    /** set to sizeof(LocGpsData) */
+    size_t size;
+    size_t measurement_count;
+    LocGpsMeasurement measurements[LOC_GPS_MAX_MEASUREMENT];
+
+    /** The GPS clock time reading. */
+    LocGpsClock clock;
+} LocGpsData;
+
+/**
+ * Represents a reading of GNSS measurements. For devices where LocGnssSystemInfo's
+ * year_of_hw is set to 2016+, it is mandatory that these be provided, on
+ * request, when the GNSS receiver is searching/tracking signals.
+ *
+ * - Reporting of GPS constellation measurements is mandatory.
+ * - Reporting of all tracked constellations are encouraged.
+ */
+typedef struct {
+    /** set to sizeof(LocGnssData) */
+    size_t size;
+
+    /** Number of measurements. */
+    size_t measurement_count;
+
+    /** The array of measurements. */
+    LocGnssMeasurement measurements[LOC_GNSS_MAX_MEASUREMENT];
+
+    /** The GPS clock time reading. */
+    LocGnssClock clock;
+} LocGnssData;
+
+/**
+ * The legacy callback for to report measurements from the HAL.
+ *
+ * This callback is deprecated, and will be removed in the next release. Use
+ * loc_gnss_measurement_callback() instead.
+ *
+ * Parameters:
+ *    data - A data structure containing the measurements.
+ */
+typedef void (*loc_gps_measurement_callback) (LocGpsData* data);
+
+/**
+ * The callback for to report measurements from the HAL.
+ *
+ * Parameters:
+ *    data - A data structure containing the measurements.
+ */
+typedef void (*loc_gnss_measurement_callback) (LocGnssData* data);
+
+typedef struct {
+    /** set to sizeof(LocGpsMeasurementCallbacks) */
+    size_t size;
+    loc_gps_measurement_callback measurement_callback;
+    loc_gnss_measurement_callback loc_gnss_measurement_callback;
+} LocGpsMeasurementCallbacks;
+
+#define LOC_GPS_MEASUREMENT_OPERATION_SUCCESS          0
+#define LOC_GPS_MEASUREMENT_ERROR_ALREADY_INIT      -100
+#define LOC_GPS_MEASUREMENT_ERROR_GENERIC           -101
+
+/**
+ * Extended interface for GPS Measurements support.
+ */
+typedef struct {
+    /** Set to sizeof(LocGpsMeasurementInterface) */
+    size_t size;
+
+    /**
+     * Initializes the interface and registers the callback routines with the HAL.
+     * After a successful call to 'init' the HAL must begin to provide updates at its own phase.
+     *
+     * Status:
+     *    LOC_GPS_MEASUREMENT_OPERATION_SUCCESS
+     *    LOC_GPS_MEASUREMENT_ERROR_ALREADY_INIT - if a callback has already been registered without a
+     *              corresponding call to 'close'
+     *    LOC_GPS_MEASUREMENT_ERROR_GENERIC - if any other error occurred, it is expected that the HAL
+     *              will not generate any updates upon returning this error code.
+     */
+    int (*init) (LocGpsMeasurementCallbacks* callbacks);
+
+    /**
+     * Stops updates from the HAL, and unregisters the callback routines.
+     * After a call to stop, the previously registered callbacks must be considered invalid by the
+     * HAL.
+     * If stop is invoked without a previous 'init', this function should perform no work.
+     */
+    void (*close) ();
+
+} LocGpsMeasurementInterface;
+
+#if 0
+/**
+ * Legacy struct to represents a GPS navigation message (or a fragment of it).
+ * Deprecated, to be removed in the next Android release.
+ * Use GnssNavigationMessage instead.
+ */
+typedef struct {
+    /** set to sizeof(GpsNavigationMessage) */
+    size_t size;
+    int8_t prn;
+    GpsNavigationMessageType type;
+    NavigationMessageStatus status;
+    int16_t message_id;
+    int16_t submessage_id;
+    size_t data_length;
+    uint8_t* data;
+} GpsNavigationMessage;
+
+/** Represents a GPS navigation message (or a fragment of it). */
+typedef struct {
+    /** set to sizeof(GnssNavigationMessage) */
+    size_t size;
+
+    /**
+     * Satellite vehicle ID number, as defined in LocGnssSvInfo::svid
+     * This is a mandatory value.
+     */
+    int16_t svid;
+
+    /**
+     * The type of message contained in the structure.
+     * This is a mandatory value.
+     */
+    GnssNavigationMessageType type;
+
+    /**
+     * The status of the received navigation message.
+     * No need to send any navigation message that contains words with parity error and cannot be
+     * corrected.
+     */
+    NavigationMessageStatus status;
+
+    /**
+     * Message identifier. It provides an index so the complete Navigation
+     * Message can be assembled.
+     *
+     * - For GPS L1 C/A subframe 4 and 5, this value corresponds to the 'frame
+     *   id' of the navigation message, in the range of 1-25 (Subframe 1, 2, 3
+     *   does not contain a 'frame id' and this value can be set to -1.)
+     *
+     * - For Glonass L1 C/A, this refers to the frame ID, in the range of 1-5.
+     *
+     * - For BeiDou D1, this refers to the frame number in the range of 1-24
+     *
+     * - For Beidou D2, this refers to the frame number, in the range of 1-120
+     *
+     * - For Galileo F/NAV nominal frame structure, this refers to the subframe
+     *   number, in the range of 1-12
+     *
+     * - For Galileo I/NAV nominal frame structure, this refers to the subframe
+     *   number in the range of 1-24
+     */
+    int16_t message_id;
+
+    /**
+     * Sub-message identifier. If required by the message 'type', this value
+     * contains a sub-index within the current message (or frame) that is being
+     * transmitted.
+     *
+     * - For GPS L1 C/A, BeiDou D1 & BeiDou D2, the submessage id corresponds to
+     *   the subframe number of the navigation message, in the range of 1-5.
+     *
+     * - For Glonass L1 C/A, this refers to the String number, in the range from
+     *   1-15
+     *
+     * - For Galileo F/NAV, this refers to the page type in the range 1-6
+     *
+     * - For Galileo I/NAV, this refers to the word type in the range 1-10+
+     */
+    int16_t submessage_id;
+
+    /**
+     * The length of the data (in bytes) contained in the current message.
+     * If this value is different from zero, 'data' must point to an array of the same size.
+     * e.g. for L1 C/A the size of the sub-frame will be 40 bytes (10 words, 30 bits/word).
+     *
+     * This is a mandatory value.
+     */
+    size_t data_length;
+
+    /**
+     * The data of the reported GPS message. The bytes (or words) specified
+     * using big endian format (MSB first).
+     *
+     * - For GPS L1 C/A, Beidou D1 & Beidou D2, each subframe contains 10 30-bit
+     *   words. Each word (30 bits) should be fit into the last 30 bits in a
+     *   4-byte word (skip B31 and B32), with MSB first, for a total of 40
+     *   bytes, covering a time period of 6, 6, and 0.6 seconds, respectively.
+     *
+     * - For Glonass L1 C/A, each string contains 85 data bits, including the
+     *   checksum.  These bits should be fit into 11 bytes, with MSB first (skip
+     *   B86-B88), covering a time period of 2 seconds.
+     *
+     * - For Galileo F/NAV, each word consists of 238-bit (sync & tail symbols
+     *   excluded). Each word should be fit into 30-bytes, with MSB first (skip
+     *   B239, B240), covering a time period of 10 seconds.
+     *
+     * - For Galileo I/NAV, each page contains 2 page parts, even and odd, with
+     *   a total of 2x114 = 228 bits, (sync & tail excluded) that should be fit
+     *   into 29 bytes, with MSB first (skip B229-B232).
+     */
+    uint8_t* data;
+
+} GnssNavigationMessage;
+
+/**
+ * The legacy callback to report an available fragment of a GPS navigation
+ * messages from the HAL.
+ *
+ * This callback is deprecated, and will be removed in the next release. Use
+ * gnss_navigation_message_callback() instead.
+ *
+ * Parameters:
+ *      message - The GPS navigation submessage/subframe representation.
+ */
+typedef void (*gps_navigation_message_callback) (GpsNavigationMessage* message);
+
+/**
+ * The callback to report an available fragment of a GPS navigation messages from the HAL.
+ *
+ * Parameters:
+ *      message - The GPS navigation submessage/subframe representation.
+ */
+typedef void (*gnss_navigation_message_callback) (GnssNavigationMessage* message);
+
+typedef struct {
+    /** set to sizeof(GpsNavigationMessageCallbacks) */
+    size_t size;
+    gps_navigation_message_callback navigation_message_callback;
+    gnss_navigation_message_callback gnss_navigation_message_callback;
+} GpsNavigationMessageCallbacks;
+
+#define GPS_NAVIGATION_MESSAGE_OPERATION_SUCCESS             0
+#define GPS_NAVIGATION_MESSAGE_ERROR_ALREADY_INIT         -100
+#define GPS_NAVIGATION_MESSAGE_ERROR_GENERIC              -101
+
+/**
+ * Extended interface for GPS navigation message reporting support.
+ */
+typedef struct {
+    /** Set to sizeof(GpsNavigationMessageInterface) */
+    size_t size;
+
+    /**
+     * Initializes the interface and registers the callback routines with the HAL.
+     * After a successful call to 'init' the HAL must begin to provide updates as they become
+     * available.
+     *
+     * Status:
+     *      GPS_NAVIGATION_MESSAGE_OPERATION_SUCCESS
+     *      GPS_NAVIGATION_MESSAGE_ERROR_ALREADY_INIT - if a callback has already been registered
+     *              without a corresponding call to 'close'.
+     *      GPS_NAVIGATION_MESSAGE_ERROR_GENERIC - if any other error occurred, it is expected that
+     *              the HAL will not generate any updates upon returning this error code.
+     */
+    int (*init) (GpsNavigationMessageCallbacks* callbacks);
+
+    /**
+     * Stops updates from the HAL, and unregisters the callback routines.
+     * After a call to stop, the previously registered callbacks must be considered invalid by the
+     * HAL.
+     * If stop is invoked without a previous 'init', this function should perform no work.
+     */
+    void (*close) ();
+
+} GpsNavigationMessageInterface;
+#endif
+
+/**
+ * Interface for passing GNSS configuration contents from platform to HAL.
+ */
+typedef struct {
+    /** Set to sizeof(LocGnssConfigurationInterface) */
+    size_t size;
+
+    /**
+     * Deliver GNSS configuration contents to HAL.
+     * Parameters:
+     *     config_data - a pointer to a char array which holds what usually is expected from
+                         file(/vendor/etc/gps.conf), i.e., a sequence of UTF8 strings separated by '\n'.
+     *     length - total number of UTF8 characters in configuraiton data.
+     *
+     * IMPORTANT:
+     *      GPS HAL should expect this function can be called multiple times. And it may be
+     *      called even when GpsLocationProvider is already constructed and enabled. GPS HAL
+     *      should maintain the existing requests for various callback regardless the change
+     *      in configuration data.
+     */
+    void (*configuration_update) (const char* config_data, int32_t length);
+} LocGnssConfigurationInterface;
+
+__END_DECLS
+
+#endif /* LOC_GPS_H */
+
diff --git a/gps/utils/loc_log.cpp b/gps/utils/loc_log.cpp
new file mode 100644
index 0000000..9fad9e6
--- /dev/null
+++ b/gps/utils/loc_log.cpp
@@ -0,0 +1,237 @@
+/* Copyright (c) 2011-2012, 2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#define LOG_NDEBUG 0
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include "loc_log.h"
+#include "msg_q.h"
+#include <platform_lib_includes.h>
+
+#define  BUFFER_SIZE  120
+
+// Logging Improvements
+const char *loc_logger_boolStr[]={"False","True"};
+const char VOID_RET[]   = "None";
+const char FROM_AFW[]   = "===>";
+const char TO_MODEM[]   = "--->";
+const char FROM_MODEM[] = "<---";
+const char TO_AFW[]     = "<===";
+const char EXIT_TAG[]   = "Exiting";
+const char ENTRY_TAG[]  = "Entering";
+const char EXIT_ERROR_TAG[]  = "Exiting with error";
+
+/* Logging Mechanism */
+loc_logger_s_type loc_logger;
+
+/* Get names from value */
+const char* loc_get_name_from_mask(const loc_name_val_s_type table[], size_t table_size, long mask)
+{
+   size_t i;
+   for (i = 0; i < table_size; i++)
+   {
+      if (table[i].val & (long) mask)
+      {
+         return table[i].name;
+      }
+   }
+   return UNKNOWN_STR;
+}
+
+/* Get names from value */
+const char* loc_get_name_from_val(const loc_name_val_s_type table[], size_t table_size, long value)
+{
+   size_t i;
+   for (i = 0; i < table_size; i++)
+   {
+      if (table[i].val == (long) value)
+      {
+         return table[i].name;
+      }
+   }
+   return UNKNOWN_STR;
+}
+
+static const loc_name_val_s_type loc_msg_q_status[] =
+{
+    NAME_VAL( eMSG_Q_SUCCESS ),
+    NAME_VAL( eMSG_Q_FAILURE_GENERAL ),
+    NAME_VAL( eMSG_Q_INVALID_PARAMETER ),
+    NAME_VAL( eMSG_Q_INVALID_HANDLE ),
+    NAME_VAL( eMSG_Q_UNAVAILABLE_RESOURCE ),
+    NAME_VAL( eMSG_Q_INSUFFICIENT_BUFFER )
+};
+static const size_t loc_msg_q_status_num = LOC_TABLE_SIZE(loc_msg_q_status);
+
+/* Find msg_q status name */
+const char* loc_get_msg_q_status(int status)
+{
+   return loc_get_name_from_val(loc_msg_q_status, loc_msg_q_status_num, (long) status);
+}
+
+const char* log_succ_fail_string(int is_succ)
+{
+   return is_succ? "successful" : "failed";
+}
+
+//Target names
+static const loc_name_val_s_type target_name[] =
+{
+    NAME_VAL(GNSS_NONE),
+    NAME_VAL(GNSS_MSM),
+    NAME_VAL(GNSS_GSS),
+    NAME_VAL(GNSS_MDM),
+    NAME_VAL(GNSS_AUTO),
+    NAME_VAL(GNSS_UNKNOWN)
+};
+
+static const size_t target_name_num = LOC_TABLE_SIZE(target_name);
+
+/*===========================================================================
+
+FUNCTION loc_get_target_name
+
+DESCRIPTION
+   Returns pointer to a string that contains name of the target
+
+   XX:XX:XX.000\0
+
+RETURN VALUE
+   The target name string
+
+===========================================================================*/
+const char *loc_get_target_name(unsigned int target)
+{
+    int index = 0;
+    static char ret[BUFFER_SIZE];
+
+    index =  getTargetGnssType(target);
+    if( index < 0 || (unsigned)index >= target_name_num )
+        index = target_name_num - 1;
+
+    if( (target & HAS_SSC) == HAS_SSC ) {
+        snprintf(ret, sizeof(ret), " %s with SSC",
+           loc_get_name_from_val(target_name, target_name_num, (long)index) );
+    }
+    else {
+       snprintf(ret, sizeof(ret), " %s  without SSC",
+           loc_get_name_from_val(target_name, target_name_num, (long)index) );
+    }
+    return ret;
+}
+
+
+/*===========================================================================
+
+FUNCTION loc_get_time
+
+DESCRIPTION
+   Logs a callback event header.
+   The pointer time_string should point to a buffer of at least 13 bytes:
+
+   XX:XX:XX.000\0
+
+RETURN VALUE
+   The time string
+
+===========================================================================*/
+char *loc_get_time(char *time_string, size_t buf_size)
+{
+   struct timeval now;     /* sec and usec     */
+   struct tm now_tm;       /* broken-down time */
+   char hms_string[80];    /* HH:MM:SS         */
+
+   gettimeofday(&now, NULL);
+   localtime_r(&now.tv_sec, &now_tm);
+
+   strftime(hms_string, sizeof hms_string, "%H:%M:%S", &now_tm);
+   snprintf(time_string, buf_size, "%s.%03d", hms_string, (int) (now.tv_usec / 1000));
+
+   return time_string;
+}
+
+
+/*===========================================================================
+FUNCTION loc_logger_init
+
+DESCRIPTION
+   Initializes the state of DEBUG_LEVEL and TIMESTAMP
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   None
+
+SIDE EFFECTS
+   N/A
+===========================================================================*/
+void loc_logger_init(unsigned long debug, unsigned long timestamp)
+{
+   loc_logger.DEBUG_LEVEL = debug;
+#ifdef TARGET_BUILD_VARIANT_USER
+   // force user builds to 2 or less
+   if (loc_logger.DEBUG_LEVEL > 2) {
+       loc_logger.DEBUG_LEVEL = 2;
+   }
+#endif
+   loc_logger.TIMESTAMP   = timestamp;
+}
+
+
+/*===========================================================================
+FUNCTION get_timestamp
+
+DESCRIPTION
+   Generates a timestamp using the current system time
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Char pointer to the parameter str
+
+SIDE EFFECTS
+   N/A
+===========================================================================*/
+char * get_timestamp(char *str, unsigned long buf_size)
+{
+  struct timeval tv;
+  struct timezone tz;
+  int hh, mm, ss;
+  gettimeofday(&tv, &tz);
+  hh = tv.tv_sec/3600%24;
+  mm = (tv.tv_sec%3600)/60;
+  ss = tv.tv_sec%60;
+  snprintf(str, buf_size, "%02d:%02d:%02d.%06ld", hh, mm, ss, tv.tv_usec);
+  return str;
+}
+
diff --git a/gps/utils/loc_log.h b/gps/utils/loc_log.h
new file mode 100644
index 0000000..be492b1
--- /dev/null
+++ b/gps/utils/loc_log.h
@@ -0,0 +1,71 @@
+/* Copyright (c) 2011-2012, 2015 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef LOC_LOG_H
+#define LOC_LOG_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <ctype.h>
+#include <stdlib.h>
+#include "loc_target.h"
+
+typedef struct
+{
+   const char *name;
+   long        val;
+} loc_name_val_s_type;
+
+#define NAME_VAL(x) {"" #x "", x }
+
+#define UNKNOWN_STR "UNKNOWN"
+
+#define CHECK_MASK(type, value, mask_var, mask) \
+   (((mask_var) & (mask)) ? (type) (value) : (type) (-1))
+
+#define LOC_TABLE_SIZE(table) (sizeof(table)/sizeof((table)[0]))
+
+/* Get names from value */
+const char* loc_get_name_from_mask(const loc_name_val_s_type table[], size_t table_size, long mask);
+const char* loc_get_name_from_val(const loc_name_val_s_type table[], size_t table_size, long value);
+const char* loc_get_msg_q_status(int status);
+const char* loc_get_target_name(unsigned int target);
+
+extern const char* log_succ_fail_string(int is_succ);
+
+extern char *loc_get_time(char *time_string, size_t buf_size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LOC_LOG_H */
diff --git a/gps/utils/loc_misc_utils.cpp b/gps/utils/loc_misc_utils.cpp
new file mode 100644
index 0000000..fd3ee6b
--- /dev/null
+++ b/gps/utils/loc_misc_utils.cpp
@@ -0,0 +1,114 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#define LOG_NDEBUG 0
+#define LOG_TAG "LocSvc_misc_utils"
+#include <stdio.h>
+#include <string.h>
+#include <platform_lib_log_util.h>
+#include <loc_misc_utils.h>
+#include <ctype.h>
+
+
+int loc_util_split_string(char *raw_string, char **split_strings_ptr,
+                          int max_num_substrings, char delimiter)
+{
+    int raw_string_index=0;
+    int num_split_strings=0;
+    unsigned char end_string=0;
+    int raw_string_length=0;
+
+    if(!raw_string || !split_strings_ptr) {
+        LOC_LOGE("%s:%d]: NULL parameters", __func__, __LINE__);
+        num_split_strings = -1;
+        goto err;
+    }
+    LOC_LOGD("%s:%d]: raw string: %s\n", __func__, __LINE__, raw_string);
+    raw_string_length = strlen(raw_string) + 1;
+    split_strings_ptr[num_split_strings] = &raw_string[raw_string_index];
+    for(raw_string_index=0; raw_string_index < raw_string_length; raw_string_index++) {
+        if(raw_string[raw_string_index] == '\0')
+            end_string=1;
+        if((raw_string[raw_string_index] == delimiter) || end_string) {
+            raw_string[raw_string_index] = '\0';
+            LOC_LOGD("%s:%d]: split string: %s\n",
+                     __func__, __LINE__, split_strings_ptr[num_split_strings]);
+            num_split_strings++;
+            if(((raw_string_index + 1) < raw_string_length) &&
+               (num_split_strings < max_num_substrings)) {
+                split_strings_ptr[num_split_strings] = &raw_string[raw_string_index+1];
+            }
+            else {
+                break;
+            }
+        }
+        if(end_string)
+            break;
+    }
+err:
+    LOC_LOGD("%s:%d]: num_split_strings: %d\n", __func__, __LINE__, num_split_strings);
+    return num_split_strings;
+}
+
+void loc_util_trim_space(char *org_string)
+{
+    char *scan_ptr, *write_ptr;
+    char *first_nonspace = NULL, *last_nonspace = NULL;
+
+    if(org_string == NULL) {
+        LOC_LOGE("%s:%d]: NULL parameter", __func__, __LINE__);
+        goto err;
+    }
+
+    scan_ptr = write_ptr = org_string;
+
+    while (*scan_ptr) {
+        //Find the first non-space character
+        if ( !isspace(*scan_ptr) && first_nonspace == NULL) {
+            first_nonspace = scan_ptr;
+        }
+        //Once the first non-space character is found in the
+        //above check, keep shifting the characters to the left
+        //to replace the spaces
+        if (first_nonspace != NULL) {
+            *(write_ptr++) = *scan_ptr;
+            //Keep track of which was the last non-space character
+            //encountered
+            //last_nonspace will not be updated in the case where
+            //the string ends with spaces
+            if ( !isspace(*scan_ptr)) {
+                last_nonspace = write_ptr;
+            }
+        }
+        scan_ptr++;
+    }
+    //Add NULL terminator after the last non-space character
+    if (last_nonspace) { *last_nonspace = '\0'; }
+err:
+    return;
+}
diff --git a/gps/utils/loc_misc_utils.h b/gps/utils/loc_misc_utils.h
new file mode 100644
index 0000000..7d66d84
--- /dev/null
+++ b/gps/utils/loc_misc_utils.h
@@ -0,0 +1,99 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ifndef _LOC_MISC_UTILS_H_
+#define _LOC_MISC_UTILS_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*===========================================================================
+FUNCTION loc_split_string
+
+DESCRIPTION:
+    This function is used to split a delimiter separated string into
+    sub-strings. This function does not allocate new memory to store the split
+    strings. Instead, it places '\0' in places of delimiters and assings the
+    starting address of the substring within the raw string as the string address
+    The input raw_string no longer remains to be a collection of sub-strings
+    after this function is executed.
+    Please make a copy of the input string before calling this function if
+    necessary
+
+PARAMETERS:
+    char *raw_string: is the original string with delimiter separated substrings
+    char **split_strings_ptr: is the arraw of pointers which will hold the addresses
+                              of individual substrings
+    int max_num_substrings: is the maximum number of substrings that are expected
+                            by the caller. The array of pointers in the above parameter
+                            is usually this long
+    char delimiter: is the delimiter that separates the substrings. Examples: ' ', ';'
+
+DEPENDENCIES
+    N/A
+
+RETURN VALUE
+    int Number of split strings
+
+SIDE EFFECTS
+    The input raw_string no longer remains a delimiter separated single string.
+
+EXAMPLE
+    delimiter = ' ' //space
+    raw_string = "hello new user" //delimiter is space ' '
+    addresses  =  0123456789abcd
+    split_strings_ptr[0] = &raw_string[0]; //split_strings_ptr[0] contains "hello"
+    split_strings_ptr[1] = &raw_string[6]; //split_strings_ptr[1] contains "new"
+    split_strings_ptr[2] = &raw_string[a]; //split_strings_ptr[2] contains "user"
+
+===========================================================================*/
+int loc_util_split_string(char *raw_string, char **split_strings_ptr, int max_num_substrings,
+                     char delimiter);
+
+/*===========================================================================
+FUNCTION trim_space
+
+DESCRIPTION
+   Removes leading and trailing spaces of the string
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   None
+
+SIDE EFFECTS
+   N/A
+===========================================================================*/
+void loc_util_trim_space(char *org_string);
+#ifdef __cplusplus
+}
+#endif
+
+#endif //_LOC_MISC_UTILS_H_
diff --git a/gps/utils/loc_nmea.cpp b/gps/utils/loc_nmea.cpp
new file mode 100644
index 0000000..eb193cc
--- /dev/null
+++ b/gps/utils/loc_nmea.cpp
@@ -0,0 +1,1106 @@
+/* Copyright (c) 2012-2017, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#define LOG_NDEBUG 0
+#define LOG_TAG "LocSvc_nmea"
+#include <loc_nmea.h>
+#include <math.h>
+#include <platform_lib_includes.h>
+
+#define GLONASS_SV_ID_OFFSET 64
+#define MAX_SATELLITES_IN_USE 12
+
+// GNSS system id according to NMEA spec
+#define SYSTEM_ID_GPS          1
+#define SYSTEM_ID_GLONASS      2
+#define SYSTEM_ID_GALILEO      3
+// Extended systems
+#define SYSTEM_ID_BEIDOU       4
+#define SYSTEM_ID_QZSS         5
+
+typedef struct loc_nmea_sv_meta_s
+{
+    char talker[3];
+    LocGnssConstellationType svType;
+    uint32_t mask;
+    uint32_t svCount;
+    uint32_t svIdOffset;
+    uint32_t systemId;
+} loc_nmea_sv_meta;
+
+typedef struct loc_sv_cache_info_s
+{
+    uint32_t gps_used_mask;
+    uint32_t glo_used_mask;
+    uint32_t gal_used_mask;
+    uint32_t qzss_used_mask;
+    uint32_t bds_used_mask;
+    uint32_t gps_count;
+    uint32_t glo_count;
+    uint32_t gal_count;
+    uint32_t qzss_count;
+    uint32_t bds_count;
+    float hdop;
+    float pdop;
+    float vdop;
+} loc_sv_cache_info;
+
+static loc_sv_cache_info sv_cache_info;
+
+/*===========================================================================
+FUNCTION    loc_nmea_sv_meta_init
+
+DESCRIPTION
+   Init loc_nmea_sv_meta passed in
+
+DEPENDENCIES
+   NONE
+
+RETURN VALUE
+   Pointer to loc_nmea_sv_meta
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+static loc_nmea_sv_meta* loc_nmea_sv_meta_init(loc_nmea_sv_meta& sv_meta,
+                                               GnssSvType svType,
+                                               bool needCombine)
+{
+    memset(&sv_meta, 0, sizeof(sv_meta));
+    sv_meta.svType = svType;
+
+    switch (svType)
+    {
+        case GNSS_SV_TYPE_GPS:
+            sv_meta.talker[0] = 'G';
+            sv_meta.talker[1] = 'P';
+            sv_meta.mask = sv_cache_info.gps_used_mask;
+            sv_meta.svCount = sv_cache_info.gps_count;
+            sv_meta.systemId = SYSTEM_ID_GPS;
+            break;
+        case GNSS_SV_TYPE_GLONASS:
+            sv_meta.talker[0] = 'G';
+            sv_meta.talker[1] = 'L';
+            sv_meta.mask = sv_cache_info.glo_used_mask;
+            sv_meta.svCount = sv_cache_info.glo_count;
+            // GLONASS SV ids are from 65-96
+            sv_meta.svIdOffset = GLONASS_SV_ID_OFFSET;
+            sv_meta.systemId = SYSTEM_ID_GLONASS;
+            break;
+        case GNSS_SV_TYPE_GALILEO:
+            sv_meta.talker[0] = 'G';
+            sv_meta.talker[1] = 'A';
+            sv_meta.mask = sv_cache_info.gal_used_mask;
+            sv_meta.svCount = sv_cache_info.gal_count;
+            sv_meta.systemId = SYSTEM_ID_GALILEO;
+            break;
+        case GNSS_SV_TYPE_QZSS:
+            sv_meta.talker[0] = 'P';
+            sv_meta.talker[1] = 'Q';
+            sv_meta.mask = sv_cache_info.qzss_used_mask;
+            sv_meta.svCount = sv_cache_info.qzss_count;
+            // QZSS SV ids are from 193-197. So keep svIdOffset 0
+            sv_meta.systemId = SYSTEM_ID_QZSS;
+            break;
+        case GNSS_SV_TYPE_BEIDOU:
+            sv_meta.talker[0] = 'P';
+            sv_meta.talker[1] = 'Q';
+            sv_meta.mask = sv_cache_info.bds_used_mask;
+            sv_meta.svCount = sv_cache_info.bds_count;
+            // BDS SV ids are from 201-235. So keep svIdOffset 0
+            sv_meta.systemId = SYSTEM_ID_BEIDOU;
+            break;
+        default:
+            LOC_LOGE("NMEA Error unknow constellation type: %d", svType);
+            return NULL;
+    }
+    if (needCombine &&
+                (sv_cache_info.gps_used_mask ? 1 : 0) +
+                (sv_cache_info.glo_used_mask ? 1 : 0) +
+                (sv_cache_info.gal_used_mask ? 1 : 0) +
+                (sv_cache_info.qzss_used_mask ? 1 : 0) +
+                (sv_cache_info.bds_used_mask ? 1 : 0) > 1)
+    {
+        // If GPS, GLONASS, Galileo, QZSS, BDS etc. are combined
+        // to obtain the reported position solution,
+        // talker shall be set to GN, to indicate that
+        // the satellites are used in a combined solution
+        sv_meta.talker[0] = 'G';
+        sv_meta.talker[1] = 'N';
+    }
+    return &sv_meta;
+}
+
+/*===========================================================================
+FUNCTION    loc_nmea_put_checksum
+
+DESCRIPTION
+   Generate NMEA sentences generated based on position report
+
+DEPENDENCIES
+   NONE
+
+RETURN VALUE
+   Total length of the nmea sentence
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+static int loc_nmea_put_checksum(char *pNmea, int maxSize)
+{
+    uint8_t checksum = 0;
+    int length = 0;
+    if(NULL == pNmea)
+        return 0;
+
+    pNmea++; //skip the $
+    while (*pNmea != '\0')
+    {
+        checksum ^= *pNmea++;
+        length++;
+    }
+
+    // length now contains nmea sentence string length not including $ sign.
+    int checksumLength = snprintf(pNmea,(maxSize-length-1),"*%02X\r\n", checksum);
+
+    // total length of nmea sentence is length of nmea sentence inc $ sign plus
+    // length of checksum (+1 is to cover the $ character in the length).
+    return (length + checksumLength + 1);
+}
+
+/*===========================================================================
+FUNCTION    loc_nmea_generate_GSA
+
+DESCRIPTION
+   Generate NMEA GSA sentences generated based on position report
+   Currently below sentences are generated:
+   - $GPGSA : GPS DOP and active SVs
+   - $GLGSA : GLONASS DOP and active SVs
+   - $GAGSA : GALILEO DOP and active SVs
+   - $GNGSA : GNSS DOP and active SVs
+
+DEPENDENCIES
+   NONE
+
+RETURN VALUE
+   Number of SVs used
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+static uint32_t loc_nmea_generate_GSA(const GpsLocationExtended &locationExtended,
+                              char* sentence,
+                              int bufSize,
+                              loc_nmea_sv_meta* sv_meta_p,
+                              std::vector<std::string> &nmeaArraystr)
+{
+    if (!sentence || bufSize <= 0 || !sv_meta_p)
+    {
+        LOC_LOGE("NMEA Error invalid arguments.");
+        return 0;
+    }
+
+    char* pMarker = sentence;
+    int lengthRemaining = bufSize;
+    int length = 0;
+
+    uint32_t svUsedCount = 0;
+    uint32_t svUsedList[32] = {0};
+
+    char fixType = '\0';
+
+    const char* talker = sv_meta_p->talker;
+    uint32_t svIdOffset = sv_meta_p->svIdOffset;
+    uint32_t mask = sv_meta_p->mask;
+
+    for (uint8_t i = 1; mask > 0 && svUsedCount < 32; i++)
+    {
+        if (mask & 1)
+            svUsedList[svUsedCount++] = i + svIdOffset;
+        mask = mask >> 1;
+    }
+
+    if (svUsedCount == 0 && GNSS_SV_TYPE_GPS != sv_meta_p->svType)
+        return 0;
+
+    if (svUsedCount == 0)
+        fixType = '1'; // no fix
+    else if (svUsedCount <= 3)
+        fixType = '2'; // 2D fix
+    else
+        fixType = '3'; // 3D fix
+
+    // Start printing the sentence
+    // Format: $--GSA,a,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,p.p,h.h,v.v*cc
+    // a : Mode  : A : Automatic, allowed to automatically switch 2D/3D
+    // x : Fixtype : 1 (no fix), 2 (2D fix), 3 (3D fix)
+    // xx : 12 SV ID
+    // p.p : Position DOP (Dilution of Precision)
+    // h.h : Horizontal DOP
+    // v.v : Vertical DOP
+    // cc : Checksum value
+    length = snprintf(pMarker, lengthRemaining, "$%sGSA,A,%c,", talker, fixType);
+
+    if (length < 0 || length >= lengthRemaining)
+    {
+        LOC_LOGE("NMEA Error in string formatting");
+        return 0;
+    }
+    pMarker += length;
+    lengthRemaining -= length;
+
+    // Add first 12 satellite IDs
+    for (uint8_t i = 0; i < 12; i++)
+    {
+        if (i < svUsedCount)
+            length = snprintf(pMarker, lengthRemaining, "%02d,", svUsedList[i]);
+        else
+            length = snprintf(pMarker, lengthRemaining, ",");
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return 0;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+    }
+
+    // Add the position/horizontal/vertical DOP values
+    if (locationExtended.flags & GPS_LOCATION_EXTENDED_HAS_DOP)
+    {
+        length = snprintf(pMarker, lengthRemaining, "%.1f,%.1f,%.1f,",
+                locationExtended.pdop,
+                locationExtended.hdop,
+                locationExtended.vdop);
+    }
+    else
+    {   // no dop
+        length = snprintf(pMarker, lengthRemaining, ",,,");
+    }
+    pMarker += length;
+    lengthRemaining -= length;
+
+    // system id
+    length = snprintf(pMarker, lengthRemaining, "%d", sv_meta_p->systemId);
+    pMarker += length;
+    lengthRemaining -= length;
+
+    /* Sentence is ready, add checksum and broadcast */
+    length = loc_nmea_put_checksum(sentence, bufSize);
+    nmeaArraystr.push_back(sentence);
+
+    return svUsedCount;
+}
+
+/*===========================================================================
+FUNCTION    loc_nmea_generate_GSV
+
+DESCRIPTION
+   Generate NMEA GSV sentences generated based on sv report
+   Currently below sentences are generated:
+   - $GPGSV: GPS Satellites in View
+   - $GNGSV: GLONASS Satellites in View
+   - $GAGSV: GALILEO Satellites in View
+
+DEPENDENCIES
+   NONE
+
+RETURN VALUE
+   NONE
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+static void loc_nmea_generate_GSV(const GnssSvNotification &svNotify,
+                              char* sentence,
+                              int bufSize,
+                              loc_nmea_sv_meta* sv_meta_p,
+                              std::vector<std::string> &nmeaArraystr)
+{
+    if (!sentence || bufSize <= 0)
+    {
+        LOC_LOGE("NMEA Error invalid argument.");
+        return;
+    }
+
+    char* pMarker = sentence;
+    int lengthRemaining = bufSize;
+    int length = 0;
+    int sentenceCount = 0;
+    int sentenceNumber = 1;
+    size_t svNumber = 1;
+
+    const char* talker = sv_meta_p->talker;
+    uint32_t svIdOffset = sv_meta_p->svIdOffset;
+    int svCount = sv_meta_p->svCount;
+
+    if (svCount <= 0)
+    {
+        // no svs in view, so just send a blank $--GSV sentence
+        snprintf(sentence, lengthRemaining, "$%sGSV,1,1,0,", talker);
+        length = loc_nmea_put_checksum(sentence, bufSize);
+        nmeaArraystr.push_back(sentence);
+        return;
+    }
+
+    svNumber = 1;
+    sentenceNumber = 1;
+    sentenceCount = svCount / 4 + (svCount % 4 != 0);
+
+    while (sentenceNumber <= sentenceCount)
+    {
+        pMarker = sentence;
+        lengthRemaining = bufSize;
+
+        length = snprintf(pMarker, lengthRemaining, "$%sGSV,%d,%d,%02d",
+                talker, sentenceCount, sentenceNumber, svCount);
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        for (int i=0; (svNumber <= svNotify.count) && (i < 4);  svNumber++)
+        {
+            if (sv_meta_p->svType == svNotify.gnssSvs[svNumber - 1].type)
+            {
+                length = snprintf(pMarker, lengthRemaining,",%02d,%02d,%03d,",
+                        svNotify.gnssSvs[svNumber - 1].svId + svIdOffset,
+                        (int)(0.5 + svNotify.gnssSvs[svNumber - 1].elevation), //float to int
+                        (int)(0.5 + svNotify.gnssSvs[svNumber - 1].azimuth)); //float to int
+
+                if (length < 0 || length >= lengthRemaining)
+                {
+                    LOC_LOGE("NMEA Error in string formatting");
+                    return;
+                }
+                pMarker += length;
+                lengthRemaining -= length;
+
+                if (svNotify.gnssSvs[svNumber - 1].cN0Dbhz > 0)
+                {
+                    length = snprintf(pMarker, lengthRemaining,"%02d",
+                            (int)(0.5 + svNotify.gnssSvs[svNumber - 1].cN0Dbhz)); //float to int
+
+                    if (length < 0 || length >= lengthRemaining)
+                    {
+                        LOC_LOGE("NMEA Error in string formatting");
+                        return;
+                    }
+                    pMarker += length;
+                    lengthRemaining -= length;
+                }
+
+                i++;
+            }
+
+        }
+
+        // The following entries are specific to QZSS and BDS
+        if ((sv_meta_p->svType == GNSS_SV_TYPE_QZSS) ||
+            (sv_meta_p->svType == GNSS_SV_TYPE_BEIDOU))
+        {
+            // last one is System id and second last is Signal Id which is always zero
+            length = snprintf(pMarker, lengthRemaining,",%d,%d",0,sv_meta_p->systemId);
+            pMarker += length;
+            lengthRemaining -= length;
+        }
+
+        length = loc_nmea_put_checksum(sentence, bufSize);
+        nmeaArraystr.push_back(sentence);
+        sentenceNumber++;
+
+    }  //while
+}
+
+/*===========================================================================
+FUNCTION    loc_nmea_generate_pos
+
+DESCRIPTION
+   Generate NMEA sentences generated based on position report
+   Currently below sentences are generated within this function:
+   - $GPGSA : GPS DOP and active SVs
+   - $GLGSA : GLONASS DOP and active SVs
+   - $GAGSA : GALILEO DOP and active SVs
+   - $GNGSA : GNSS DOP and active SVs
+   - $--VTG : Track made good and ground speed
+   - $--RMC : Recommended minimum navigation information
+   - $--GGA : Time, position and fix related data
+
+DEPENDENCIES
+   NONE
+
+RETURN VALUE
+   0
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+void loc_nmea_generate_pos(const UlpLocation &location,
+                               const GpsLocationExtended &locationExtended,
+                               unsigned char generate_nmea,
+                               std::vector<std::string> &nmeaArraystr)
+{
+    ENTRY_LOG();
+    time_t utcTime(location.gpsLocation.timestamp/1000);
+    tm * pTm = gmtime(&utcTime);
+    if (NULL == pTm) {
+        LOC_LOGE("gmtime failed");
+        return;
+    }
+
+    char sentence[NMEA_SENTENCE_MAX_LENGTH] = {0};
+    char* pMarker = sentence;
+    int lengthRemaining = sizeof(sentence);
+    int length = 0;
+    int utcYear = pTm->tm_year % 100; // 2 digit year
+    int utcMonth = pTm->tm_mon + 1; // tm_mon starts at zero
+    int utcDay = pTm->tm_mday;
+    int utcHours = pTm->tm_hour;
+    int utcMinutes = pTm->tm_min;
+    int utcSeconds = pTm->tm_sec;
+    int utcMSeconds = (location.gpsLocation.timestamp)%1000;
+
+    if (generate_nmea) {
+        char talker[3] = {'G', 'P', '\0'};
+        uint32_t svUsedCount = 0;
+        uint32_t count = 0;
+        loc_nmea_sv_meta sv_meta;
+        // -------------------
+        // ---$GPGSA/$GNGSA---
+        // -------------------
+
+        count = loc_nmea_generate_GSA(locationExtended, sentence, sizeof(sentence),
+                loc_nmea_sv_meta_init(sv_meta, GNSS_SV_TYPE_GPS, true), nmeaArraystr);
+        if (count > 0)
+        {
+            svUsedCount += count;
+            talker[0] = sv_meta.talker[0];
+            talker[1] = sv_meta.talker[1];
+        }
+
+        // -------------------
+        // ---$GLGSA/$GNGSA---
+        // -------------------
+
+        count = loc_nmea_generate_GSA(locationExtended, sentence, sizeof(sentence),
+                loc_nmea_sv_meta_init(sv_meta, GNSS_SV_TYPE_GLONASS, true), nmeaArraystr);
+        if (count > 0)
+        {
+            svUsedCount += count;
+            talker[0] = sv_meta.talker[0];
+            talker[1] = sv_meta.talker[1];
+        }
+
+        // -------------------
+        // ---$GAGSA/$GNGSA---
+        // -------------------
+
+        count = loc_nmea_generate_GSA(locationExtended, sentence, sizeof(sentence),
+                loc_nmea_sv_meta_init(sv_meta, GNSS_SV_TYPE_GALILEO, true), nmeaArraystr);
+        if (count > 0)
+        {
+            svUsedCount += count;
+            talker[0] = sv_meta.talker[0];
+            talker[1] = sv_meta.talker[1];
+        }
+
+        // --------------------------
+        // ---$PQGSA/$GNGSA (QZSS)---
+        // --------------------------
+
+        count = loc_nmea_generate_GSA(locationExtended, sentence, sizeof(sentence),
+                loc_nmea_sv_meta_init(sv_meta, GNSS_SV_TYPE_QZSS, false), nmeaArraystr);
+        if (count > 0)
+        {
+            svUsedCount += count;
+            // talker should be default "GP". If GPS, GLO etc is used, it should be "GN"
+        }
+
+        // ----------------------------
+        // ---$PQGSA/$GNGSA (BEIDOU)---
+        // ----------------------------
+        count = loc_nmea_generate_GSA(locationExtended, sentence, sizeof(sentence),
+                loc_nmea_sv_meta_init(sv_meta, GNSS_SV_TYPE_BEIDOU, false), nmeaArraystr);
+        if (count > 0)
+        {
+            svUsedCount += count;
+            // talker should be default "GP". If GPS, GLO etc is used, it should be "GN"
+        }
+
+        // -------------------
+        // ------$--VTG-------
+        // -------------------
+
+        pMarker = sentence;
+        lengthRemaining = sizeof(sentence);
+
+        if (location.gpsLocation.flags & LOC_GPS_LOCATION_HAS_BEARING)
+        {
+            float magTrack = location.gpsLocation.bearing;
+            if (locationExtended.flags & GPS_LOCATION_EXTENDED_HAS_MAG_DEV)
+            {
+                float magTrack = location.gpsLocation.bearing - locationExtended.magneticDeviation;
+                if (magTrack < 0.0)
+                    magTrack += 360.0;
+                else if (magTrack > 360.0)
+                    magTrack -= 360.0;
+            }
+
+            length = snprintf(pMarker, lengthRemaining, "$%sVTG,%.1lf,T,%.1lf,M,", talker, location.gpsLocation.bearing, magTrack);
+        }
+        else
+        {
+            length = snprintf(pMarker, lengthRemaining, "$%sVTG,,T,,M,", talker);
+        }
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        if (location.gpsLocation.flags & LOC_GPS_LOCATION_HAS_SPEED)
+        {
+            float speedKnots = location.gpsLocation.speed * (3600.0/1852.0);
+            float speedKmPerHour = location.gpsLocation.speed * 3.6;
+
+            length = snprintf(pMarker, lengthRemaining, "%.1lf,N,%.1lf,K,", speedKnots, speedKmPerHour);
+        }
+        else
+        {
+            length = snprintf(pMarker, lengthRemaining, ",N,,K,");
+        }
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        if (!(location.gpsLocation.flags & LOC_GPS_LOCATION_HAS_LAT_LONG))
+            // N means no fix
+            length = snprintf(pMarker, lengthRemaining, "%c", 'N');
+        else if (LOC_NAV_MASK_SBAS_CORRECTION_IONO & locationExtended.navSolutionMask)
+            // D means differential
+            length = snprintf(pMarker, lengthRemaining, "%c", 'D');
+        else if (LOC_POS_TECH_MASK_SENSORS == locationExtended.tech_mask)
+            // E means estimated (dead reckoning)
+            length = snprintf(pMarker, lengthRemaining, "%c", 'E');
+        else // A means autonomous
+            length = snprintf(pMarker, lengthRemaining, "%c", 'A');
+
+        length = loc_nmea_put_checksum(sentence, sizeof(sentence));
+        nmeaArraystr.push_back(sentence);
+
+        // -------------------
+        // ------$--RMC-------
+        // -------------------
+
+        pMarker = sentence;
+        lengthRemaining = sizeof(sentence);
+
+        length = snprintf(pMarker, lengthRemaining, "$%sRMC,%02d%02d%02d.%02d,A," ,
+                          talker, utcHours, utcMinutes, utcSeconds,utcMSeconds/10);
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        if (location.gpsLocation.flags & LOC_GPS_LOCATION_HAS_LAT_LONG)
+        {
+            double latitude = location.gpsLocation.latitude;
+            double longitude = location.gpsLocation.longitude;
+            char latHemisphere;
+            char lonHemisphere;
+            double latMinutes;
+            double lonMinutes;
+
+            if (latitude > 0)
+            {
+                latHemisphere = 'N';
+            }
+            else
+            {
+                latHemisphere = 'S';
+                latitude *= -1.0;
+            }
+
+            if (longitude < 0)
+            {
+                lonHemisphere = 'W';
+                longitude *= -1.0;
+            }
+            else
+            {
+                lonHemisphere = 'E';
+            }
+
+            latMinutes = fmod(latitude * 60.0 , 60.0);
+            lonMinutes = fmod(longitude * 60.0 , 60.0);
+
+            length = snprintf(pMarker, lengthRemaining, "%02d%09.6lf,%c,%03d%09.6lf,%c,",
+                              (uint8_t)floor(latitude), latMinutes, latHemisphere,
+                              (uint8_t)floor(longitude),lonMinutes, lonHemisphere);
+        }
+        else
+        {
+            length = snprintf(pMarker, lengthRemaining,",,,,");
+        }
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        if (location.gpsLocation.flags & LOC_GPS_LOCATION_HAS_SPEED)
+        {
+            float speedKnots = location.gpsLocation.speed * (3600.0/1852.0);
+            length = snprintf(pMarker, lengthRemaining, "%.1lf,", speedKnots);
+        }
+        else
+        {
+            length = snprintf(pMarker, lengthRemaining, ",");
+        }
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        if (location.gpsLocation.flags & LOC_GPS_LOCATION_HAS_BEARING)
+        {
+            length = snprintf(pMarker, lengthRemaining, "%.1lf,", location.gpsLocation.bearing);
+        }
+        else
+        {
+            length = snprintf(pMarker, lengthRemaining, ",");
+        }
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        length = snprintf(pMarker, lengthRemaining, "%2.2d%2.2d%2.2d,",
+                          utcDay, utcMonth, utcYear);
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        if (locationExtended.flags & GPS_LOCATION_EXTENDED_HAS_MAG_DEV)
+        {
+            float magneticVariation = locationExtended.magneticDeviation;
+            char direction;
+            if (magneticVariation < 0.0)
+            {
+                direction = 'W';
+                magneticVariation *= -1.0;
+            }
+            else
+            {
+                direction = 'E';
+            }
+
+            length = snprintf(pMarker, lengthRemaining, "%.1lf,%c,",
+                              magneticVariation, direction);
+        }
+        else
+        {
+            length = snprintf(pMarker, lengthRemaining, ",,");
+        }
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        if (!(location.gpsLocation.flags & LOC_GPS_LOCATION_HAS_LAT_LONG))
+            // N means no fix
+            length = snprintf(pMarker, lengthRemaining, "%c", 'N');
+        else if (LOC_NAV_MASK_SBAS_CORRECTION_IONO & locationExtended.navSolutionMask)
+            // D means differential
+            length = snprintf(pMarker, lengthRemaining, "%c", 'D');
+        else if (LOC_POS_TECH_MASK_SENSORS == locationExtended.tech_mask)
+            // E means estimated (dead reckoning)
+            length = snprintf(pMarker, lengthRemaining, "%c", 'E');
+        else  // A means autonomous
+            length = snprintf(pMarker, lengthRemaining, "%c", 'A');
+
+        length = loc_nmea_put_checksum(sentence, sizeof(sentence));
+        nmeaArraystr.push_back(sentence);
+
+        // -------------------
+        // ------$--GGA-------
+        // -------------------
+
+        pMarker = sentence;
+        lengthRemaining = sizeof(sentence);
+
+        length = snprintf(pMarker, lengthRemaining, "$%sGGA,%02d%02d%02d.%02d," ,
+                          talker, utcHours, utcMinutes, utcSeconds, utcMSeconds/10);
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        if (location.gpsLocation.flags & LOC_GPS_LOCATION_HAS_LAT_LONG)
+        {
+            double latitude = location.gpsLocation.latitude;
+            double longitude = location.gpsLocation.longitude;
+            char latHemisphere;
+            char lonHemisphere;
+            double latMinutes;
+            double lonMinutes;
+
+            if (latitude > 0)
+            {
+                latHemisphere = 'N';
+            }
+            else
+            {
+                latHemisphere = 'S';
+                latitude *= -1.0;
+            }
+
+            if (longitude < 0)
+            {
+                lonHemisphere = 'W';
+                longitude *= -1.0;
+            }
+            else
+            {
+                lonHemisphere = 'E';
+            }
+
+            latMinutes = fmod(latitude * 60.0 , 60.0);
+            lonMinutes = fmod(longitude * 60.0 , 60.0);
+
+            length = snprintf(pMarker, lengthRemaining, "%02d%09.6lf,%c,%03d%09.6lf,%c,",
+                              (uint8_t)floor(latitude), latMinutes, latHemisphere,
+                              (uint8_t)floor(longitude),lonMinutes, lonHemisphere);
+        }
+        else
+        {
+            length = snprintf(pMarker, lengthRemaining,",,,,");
+        }
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        char gpsQuality;
+        if (!(location.gpsLocation.flags & LOC_GPS_LOCATION_HAS_LAT_LONG))
+            gpsQuality = '0'; // 0 means no fix
+        else if (LOC_NAV_MASK_SBAS_CORRECTION_IONO & locationExtended.navSolutionMask)
+            gpsQuality = '2'; // 2 means DGPS fix
+        else if (LOC_POS_TECH_MASK_SENSORS == locationExtended.tech_mask)
+            gpsQuality = '6'; // 6 means estimated (dead reckoning)
+        else
+            gpsQuality = '1'; // 1 means GPS fix
+
+        // Number of satellites in use, 00-12
+        if (svUsedCount > MAX_SATELLITES_IN_USE)
+            svUsedCount = MAX_SATELLITES_IN_USE;
+        if (locationExtended.flags & GPS_LOCATION_EXTENDED_HAS_DOP)
+        {
+            length = snprintf(pMarker, lengthRemaining, "%c,%02d,%.1f,",
+                              gpsQuality, svUsedCount, locationExtended.hdop);
+        }
+        else
+        {   // no hdop
+            length = snprintf(pMarker, lengthRemaining, "%c,%02d,,",
+                              gpsQuality, svUsedCount);
+        }
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        if (locationExtended.flags & GPS_LOCATION_EXTENDED_HAS_ALTITUDE_MEAN_SEA_LEVEL)
+        {
+            length = snprintf(pMarker, lengthRemaining, "%.1lf,M,",
+                              locationExtended.altitudeMeanSeaLevel);
+        }
+        else
+        {
+            length = snprintf(pMarker, lengthRemaining,",,");
+        }
+
+        if (length < 0 || length >= lengthRemaining)
+        {
+            LOC_LOGE("NMEA Error in string formatting");
+            return;
+        }
+        pMarker += length;
+        lengthRemaining -= length;
+
+        if ((location.gpsLocation.flags & LOC_GPS_LOCATION_HAS_ALTITUDE) &&
+            (locationExtended.flags & GPS_LOCATION_EXTENDED_HAS_ALTITUDE_MEAN_SEA_LEVEL))
+        {
+            length = snprintf(pMarker, lengthRemaining, "%.1lf,M,,",
+                              location.gpsLocation.altitude - locationExtended.altitudeMeanSeaLevel);
+        }
+        else
+        {
+            length = snprintf(pMarker, lengthRemaining,",,,");
+        }
+
+        length = loc_nmea_put_checksum(sentence, sizeof(sentence));
+        nmeaArraystr.push_back(sentence);
+
+        // clear the cache so they can't be used again
+        sv_cache_info.gps_used_mask = 0;
+        sv_cache_info.glo_used_mask = 0;
+        sv_cache_info.gal_used_mask = 0;
+        sv_cache_info.qzss_used_mask = 0;
+        sv_cache_info.bds_used_mask = 0;
+    }
+    //Send blank NMEA reports for non-final fixes
+    else {
+        strlcpy(sentence, "$GPGSA,A,1,,,,,,,,,,,,,,,", sizeof(sentence));
+        length = loc_nmea_put_checksum(sentence, sizeof(sentence));
+        nmeaArraystr.push_back(sentence);
+
+        strlcpy(sentence, "$GNGSA,A,1,,,,,,,,,,,,,,,", sizeof(sentence));
+        length = loc_nmea_put_checksum(sentence, sizeof(sentence));
+        nmeaArraystr.push_back(sentence);
+
+        strlcpy(sentence, "$PQGSA,A,1,,,,,,,,,,,,,,,", sizeof(sentence));
+        length = loc_nmea_put_checksum(sentence, sizeof(sentence));
+        nmeaArraystr.push_back(sentence);
+
+        strlcpy(sentence, "$GPVTG,,T,,M,,N,,K,N", sizeof(sentence));
+        length = loc_nmea_put_checksum(sentence, sizeof(sentence));
+        nmeaArraystr.push_back(sentence);
+
+        strlcpy(sentence, "$GPRMC,,V,,,,,,,,,,N", sizeof(sentence));
+        length = loc_nmea_put_checksum(sentence, sizeof(sentence));
+        nmeaArraystr.push_back(sentence);
+
+        strlcpy(sentence, "$GPGGA,,,,,,0,,,,,,,,", sizeof(sentence));
+        length = loc_nmea_put_checksum(sentence, sizeof(sentence));
+        nmeaArraystr.push_back(sentence);
+    }
+
+    EXIT_LOG(%d, 0);
+}
+
+
+
+/*===========================================================================
+FUNCTION    loc_nmea_generate_sv
+
+DESCRIPTION
+   Generate NMEA sentences generated based on sv report
+
+DEPENDENCIES
+   NONE
+
+RETURN VALUE
+   0
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+void loc_nmea_generate_sv(const GnssSvNotification &svNotify,
+                              std::vector<std::string> &nmeaArraystr)
+{
+    ENTRY_LOG();
+
+    char sentence[NMEA_SENTENCE_MAX_LENGTH] = {0};
+    char* pMarker = sentence;
+    int lengthRemaining = sizeof(sentence);
+    int length = 0;
+    int svCount = svNotify.count;
+    int sentenceCount = 0;
+    int sentenceNumber = 1;
+    int svNumber = 1;
+
+    //Count GPS SVs for saparating GPS from GLONASS and throw others
+
+    sv_cache_info.gps_used_mask = 0;
+    sv_cache_info.glo_used_mask = 0;
+    sv_cache_info.gal_used_mask = 0;
+    sv_cache_info.qzss_used_mask = 0;
+    sv_cache_info.bds_used_mask = 0;
+
+    sv_cache_info.gps_count = 0;
+    sv_cache_info.glo_count = 0;
+    sv_cache_info.gal_count = 0;
+    sv_cache_info.qzss_count = 0;
+    sv_cache_info.bds_count = 0;
+    for(svNumber=1; svNumber <= svCount; svNumber++) {
+        if (GNSS_SV_TYPE_GPS == svNotify.gnssSvs[svNumber - 1].type)
+        {
+            // cache the used in fix mask, as it will be needed to send $GPGSA
+            // during the position report
+            if (GNSS_SV_OPTIONS_USED_IN_FIX_BIT ==
+                    (svNotify.gnssSvs[svNumber - 1].gnssSvOptionsMask &
+                      GNSS_SV_OPTIONS_USED_IN_FIX_BIT))
+            {
+                sv_cache_info.gps_used_mask |= (1 << (svNotify.gnssSvs[svNumber - 1].svId - 1));
+            }
+            sv_cache_info.gps_count++;
+        }
+        else if (GNSS_SV_TYPE_GLONASS == svNotify.gnssSvs[svNumber - 1].type)
+        {
+            // cache the used in fix mask, as it will be needed to send $GNGSA
+            // during the position report
+            if (GNSS_SV_OPTIONS_USED_IN_FIX_BIT ==
+                    (svNotify.gnssSvs[svNumber - 1].gnssSvOptionsMask &
+                      GNSS_SV_OPTIONS_USED_IN_FIX_BIT))
+            {
+                sv_cache_info.glo_used_mask |= (1 << (svNotify.gnssSvs[svNumber - 1].svId - 1));
+            }
+            sv_cache_info.glo_count++;
+        }
+        else if (GNSS_SV_TYPE_GALILEO == svNotify.gnssSvs[svNumber - 1].type)
+        {
+            // cache the used in fix mask, as it will be needed to send $GAGSA
+            // during the position report
+            if (GNSS_SV_OPTIONS_USED_IN_FIX_BIT ==
+                    (svNotify.gnssSvs[svNumber - 1].gnssSvOptionsMask &
+                      GNSS_SV_OPTIONS_USED_IN_FIX_BIT))
+            {
+                sv_cache_info.gal_used_mask |= (1 << (svNotify.gnssSvs[svNumber - 1].svId - 1));
+            }
+            sv_cache_info.gal_count++;
+        }
+        else if (GNSS_SV_TYPE_QZSS == svNotify.gnssSvs[svNumber - 1].type)
+        {
+            // cache the used in fix mask, as it will be needed to send $PQGSA
+            // during the position report
+            if (GNSS_SV_OPTIONS_USED_IN_FIX_BIT ==
+                (svNotify.gnssSvs[svNumber - 1].gnssSvOptionsMask &
+                  GNSS_SV_OPTIONS_USED_IN_FIX_BIT))
+            {
+                sv_cache_info.qzss_used_mask |= (1 << (svNotify.gnssSvs[svNumber - 1].svId - 1));
+            }
+            sv_cache_info.qzss_count++;
+        }
+        else if (GNSS_SV_TYPE_BEIDOU == svNotify.gnssSvs[svNumber - 1].type)
+        {
+            // cache the used in fix mask, as it will be needed to send $PQGSA
+            // during the position report
+            if (GNSS_SV_OPTIONS_USED_IN_FIX_BIT ==
+                (svNotify.gnssSvs[svNumber - 1].gnssSvOptionsMask &
+                  GNSS_SV_OPTIONS_USED_IN_FIX_BIT))
+            {
+                sv_cache_info.bds_used_mask |= (1 << (svNotify.gnssSvs[svNumber - 1].svId - 1));
+            }
+            sv_cache_info.bds_count++;
+        }
+    }
+
+    loc_nmea_sv_meta sv_meta;
+    // ------------------
+    // ------$GPGSV------
+    // ------------------
+
+    loc_nmea_generate_GSV(svNotify, sentence, sizeof(sentence),
+            loc_nmea_sv_meta_init(sv_meta, GNSS_SV_TYPE_GPS, false), nmeaArraystr);
+
+    // ------------------
+    // ------$GLGSV------
+    // ------------------
+
+    loc_nmea_generate_GSV(svNotify, sentence, sizeof(sentence),
+            loc_nmea_sv_meta_init(sv_meta, GNSS_SV_TYPE_GLONASS, false), nmeaArraystr);
+
+    // ------------------
+    // ------$GAGSV------
+    // ------------------
+
+    loc_nmea_generate_GSV(svNotify, sentence, sizeof(sentence),
+            loc_nmea_sv_meta_init(sv_meta, GNSS_SV_TYPE_GALILEO, false), nmeaArraystr);
+
+    // -------------------------
+    // ------$PQGSV (QZSS)------
+    // -------------------------
+
+    loc_nmea_generate_GSV(svNotify, sentence, sizeof(sentence),
+            loc_nmea_sv_meta_init(sv_meta, GNSS_SV_TYPE_QZSS, false), nmeaArraystr);
+
+    // ---------------------------
+    // ------$PQGSV (BEIDOU)------
+    // ---------------------------
+
+    loc_nmea_generate_GSV(svNotify, sentence, sizeof(sentence),
+            loc_nmea_sv_meta_init(sv_meta, GNSS_SV_TYPE_BEIDOU, false), nmeaArraystr);
+
+    EXIT_LOG(%d, 0);
+}
diff --git a/gps/utils/loc_nmea.h b/gps/utils/loc_nmea.h
new file mode 100644
index 0000000..585a9c1
--- /dev/null
+++ b/gps/utils/loc_nmea.h
@@ -0,0 +1,54 @@
+/* Copyright (c) 2012-2013, 2015-2017 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef LOC_ENG_NMEA_H
+#define LOC_ENG_NMEA_H
+
+#include <gps_extended.h>
+#include <vector>
+#include <string>
+#define NMEA_SENTENCE_MAX_LENGTH 200
+
+void loc_nmea_generate_sv(const GnssSvNotification &svNotify,
+                              std::vector<std::string> &nmeaArraystr);
+
+void loc_nmea_generate_pos(const UlpLocation &location,
+                               const GpsLocationExtended &locationExtended,
+                               unsigned char generate_nmea,
+                               std::vector<std::string> &nmeaArraystr);
+
+#define DEBUG_NMEA_MINSIZE 6
+#define DEBUG_NMEA_MAXSIZE 4096
+inline bool loc_nmea_is_debug(const char* nmea, int length) {
+    return ((nullptr != nmea) &&
+            (length >= DEBUG_NMEA_MINSIZE) && (length <= DEBUG_NMEA_MAXSIZE) &&
+            (nmea[0] == '$') && (nmea[1] == 'P') && (nmea[2] == 'Q') && (nmea[3] == 'W'));
+}
+
+#endif // LOC_ENG_NMEA_H
diff --git a/gps/utils/loc_target.cpp b/gps/utils/loc_target.cpp
new file mode 100644
index 0000000..cf42932
--- /dev/null
+++ b/gps/utils/loc_target.cpp
@@ -0,0 +1,221 @@
+/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <cutils/properties.h>
+#include "loc_target.h"
+#include "loc_log.h"
+#include <platform_lib_includes.h>
+
+#define APQ8064_ID_1 "109"
+#define APQ8064_ID_2 "153"
+#define MPQ8064_ID_1 "130"
+#define MSM8930_ID_1 "142"
+#define MSM8930_ID_2 "116"
+#define APQ8030_ID_1 "157"
+#define APQ8074_ID_1 "184"
+
+#define LINE_LEN 100
+#define STR_LIQUID      "Liquid"
+#define STR_SURF        "Surf"
+#define STR_MTP         "MTP"
+#define STR_APQ         "apq"
+#define STR_SDC         "sdc"  // alternative string for APQ targets
+#define STR_MSM         "msm"
+#define STR_SDM         "sdm"  // alternative string for MSM targets
+#define STR_APQ_NO_WGR  "baseband_apq_nowgr"
+#define STR_AUTO        "auto"
+#define IS_STR_END(c) ((c) == '\0' || (c) == '\n' || (c) == '\r')
+#define LENGTH(s) (sizeof(s) - 1)
+#define GPS_CHECK_NO_ERROR 0
+#define GPS_CHECK_NO_GPS_HW 1
+
+static unsigned int gTarget = (unsigned int)-1;
+
+static int read_a_line(const char * file_path, char * line, int line_size)
+{
+    FILE *fp;
+    int result = 0;
+
+    * line = '\0';
+    fp = fopen(file_path, "r" );
+    if( fp == NULL ) {
+        LOC_LOGE("open failed: %s: %s\n", file_path, strerror(errno));
+        result = -1;
+    } else {
+        int len;
+        fgets(line, line_size, fp);
+        len = strlen(line);
+        len = len < line_size - 1? len : line_size - 1;
+        line[len] = '\0';
+        LOC_LOGD("cat %s: %s", file_path, line);
+        fclose(fp);
+    }
+    return result;
+}
+
+/*The character array passed to this function should have length
+  of atleast PROPERTY_VALUE_MAX*/
+void loc_get_target_baseband(char *baseband, int array_length)
+{
+    if(baseband && (array_length >= PROPERTY_VALUE_MAX)) {
+        property_get("ro.baseband", baseband, "");
+        LOC_LOGD("%s:%d]: Baseband: %s\n", __func__, __LINE__, baseband);
+    }
+    else {
+        LOC_LOGE("%s:%d]: NULL parameter or array length less than PROPERTY_VALUE_MAX\n",
+                 __func__, __LINE__);
+    }
+}
+
+/*The character array passed to this function should have length
+  of atleast PROPERTY_VALUE_MAX*/
+void loc_get_platform_name(char *platform_name, int array_length)
+{
+    if(platform_name && (array_length >= PROPERTY_VALUE_MAX)) {
+        property_get("ro.board.platform", platform_name, "");
+        LOC_LOGD("%s:%d]: Target name: %s\n", __func__, __LINE__, platform_name);
+    }
+    else {
+        LOC_LOGE("%s:%d]: Null parameter or array length less than PROPERTY_VALUE_MAX\n",
+                 __func__, __LINE__);
+    }
+}
+
+/*The character array passed to this function should have length
+  of atleast PROPERTY_VALUE_MAX*/
+void loc_get_auto_platform_name(char *platform_name, int array_length)
+{
+    if(platform_name && (array_length >= PROPERTY_VALUE_MAX)) {
+        property_get("ro.hardware.type", platform_name, "");
+        LOC_LOGD("%s:%d]: Autoplatform name: %s\n", __func__, __LINE__, platform_name);
+    }
+    else {
+        LOC_LOGE("%s:%d]: Null parameter or array length less than PROPERTY_VALUE_MAX\n",
+                 __func__, __LINE__);
+    }
+}
+
+unsigned int loc_get_target(void)
+{
+    if (gTarget != (unsigned int)-1)
+        return gTarget;
+
+    static const char hw_platform[]      = "/sys/devices/soc0/hw_platform";
+    static const char id[]               = "/sys/devices/soc0/soc_id";
+    static const char hw_platform_dep[]  =
+        "/sys/devices/system/soc/soc0/hw_platform";
+    static const char id_dep[]           = "/sys/devices/system/soc/soc0/id";
+    static const char mdm[]              = "/target"; // mdm target we are using
+
+    char rd_hw_platform[LINE_LEN];
+    char rd_id[LINE_LEN];
+    char rd_mdm[LINE_LEN];
+    char baseband[LINE_LEN];
+    char rd_auto_platform[LINE_LEN];
+
+    loc_get_target_baseband(baseband, sizeof(baseband));
+
+    if (!access(hw_platform, F_OK)) {
+        read_a_line(hw_platform, rd_hw_platform, LINE_LEN);
+    } else {
+        read_a_line(hw_platform_dep, rd_hw_platform, LINE_LEN);
+    }
+    if (!access(id, F_OK)) {
+        read_a_line(id, rd_id, LINE_LEN);
+    } else {
+        read_a_line(id_dep, rd_id, LINE_LEN);
+    }
+
+    /*check automotive platform*/
+    loc_get_auto_platform_name(rd_auto_platform, sizeof(rd_auto_platform));
+    if( !memcmp(rd_auto_platform, STR_AUTO, LENGTH(STR_AUTO)) )
+    {
+          gTarget = TARGET_AUTO;
+          goto detected;
+    }
+
+    if( !memcmp(baseband, STR_APQ_NO_WGR, LENGTH(STR_APQ_NO_WGR)) ){
+
+        gTarget = TARGET_NO_GNSS;
+        goto detected;
+    }
+
+    if( !memcmp(baseband, STR_APQ, LENGTH(STR_APQ)) ||
+        !memcmp(baseband, STR_SDC, LENGTH(STR_SDC)) ) {
+
+        if( !memcmp(rd_id, MPQ8064_ID_1, LENGTH(MPQ8064_ID_1))
+            && IS_STR_END(rd_id[LENGTH(MPQ8064_ID_1)]) )
+            gTarget = TARGET_NO_GNSS;
+        else
+            gTarget = TARGET_APQ_SA;
+    } else if (((!memcmp(rd_hw_platform, STR_LIQUID, LENGTH(STR_LIQUID))
+                 && IS_STR_END(rd_hw_platform[LENGTH(STR_LIQUID)])) ||
+                (!memcmp(rd_hw_platform, STR_SURF,   LENGTH(STR_SURF))
+                 && IS_STR_END(rd_hw_platform[LENGTH(STR_SURF)])) ||
+                (!memcmp(rd_hw_platform, STR_MTP,   LENGTH(STR_MTP))
+                 && IS_STR_END(rd_hw_platform[LENGTH(STR_MTP)]))) &&
+               !read_a_line( mdm, rd_mdm, LINE_LEN)) {
+        gTarget = TARGET_MDM;
+    } else if( (!memcmp(rd_id, MSM8930_ID_1, LENGTH(MSM8930_ID_1))
+                && IS_STR_END(rd_id[LENGTH(MSM8930_ID_1)])) ||
+               (!memcmp(rd_id, MSM8930_ID_2, LENGTH(MSM8930_ID_2))
+                && IS_STR_END(rd_id[LENGTH(MSM8930_ID_2)])) ) {
+        gTarget = TARGET_MSM_NO_SSC;
+    } else if ( !memcmp(baseband, STR_MSM, LENGTH(STR_MSM)) ||
+                !memcmp(baseband, STR_SDM, LENGTH(STR_SDM)) ) {
+        gTarget = TARGET_DEFAULT;
+    } else {
+        gTarget = TARGET_UNKNOWN;
+    }
+
+detected:
+    LOC_LOGW("HAL: %s returned %d", __FUNCTION__, gTarget);
+    return gTarget;
+}
+
+/*Reads the property ro.lean to identify if this is a lean target
+  Returns:
+  0 if not a lean and mean target
+  1 if this is a lean and mean target
+*/
+int loc_identify_lean_target()
+{
+    int ret = 0;
+    char lean_target[PROPERTY_VALUE_MAX];
+    property_get("ro.lean", lean_target, "");
+    LOC_LOGD("%s:%d]: lean target: %s\n", __func__, __LINE__, lean_target);
+    return !(strncmp(lean_target, "true", PROPERTY_VALUE_MAX));
+}
diff --git a/gps/utils/loc_target.h b/gps/utils/loc_target.h
new file mode 100644
index 0000000..47a67d9
--- /dev/null
+++ b/gps/utils/loc_target.h
@@ -0,0 +1,84 @@
+/* Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ifndef LOC_TARGET_H
+#define LOC_TARGET_H
+#define TARGET_SET(gnss,ssc) ( (gnss<<1)|ssc )
+#define TARGET_DEFAULT       TARGET_SET(GNSS_MSM, HAS_SSC)
+#define TARGET_MDM           TARGET_SET(GNSS_MDM, HAS_SSC)
+#define TARGET_APQ_SA        TARGET_SET(GNSS_GSS, NO_SSC)
+#define TARGET_NO_GNSS       TARGET_SET(GNSS_NONE, NO_SSC)
+#define TARGET_MSM_NO_SSC    TARGET_SET(GNSS_MSM, NO_SSC)
+#define TARGET_AUTO          TARGET_SET(GNSS_AUTO, NO_SSC)
+#define TARGET_UNKNOWN       TARGET_SET(GNSS_UNKNOWN, NO_SSC)
+#define getTargetGnssType(target)  (target>>1)
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+unsigned int loc_get_target(void);
+
+/*The character array passed to this function should have length
+  of atleast PROPERTY_VALUE_MAX*/
+void loc_get_target_baseband(char *baseband, int array_length);
+/*The character array passed to this function should have length
+  of atleast PROPERTY_VALUE_MAX*/
+void loc_get_platform_name(char *platform_name, int array_length);
+/*The character array passed to this function should have length
+  of atleast PROPERTY_VALUE_MAX*/
+void loc_get_auto_platform_name(char *platform_name, int array_length);
+
+/*Reads the property ro.lean to identify if this is a lean target
+  Returns:
+  0 if not a lean and mean target
+  1 if this is a lean and mean target*/
+int loc_identify_lean_target();
+
+/* Please remember to update 'target_name' in loc_log.cpp,
+   if do any changes to this enum. */
+typedef enum {
+    GNSS_NONE = 0,
+    GNSS_MSM,
+    GNSS_GSS,
+    GNSS_MDM,
+    GNSS_AUTO,
+    GNSS_UNKNOWN
+}GNSS_TARGET;
+
+typedef enum {
+    NO_SSC = 0,
+    HAS_SSC
+}SSC_TYPE;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*LOC_TARGET_H*/
diff --git a/gps/utils/loc_timer.h b/gps/utils/loc_timer.h
new file mode 100644
index 0000000..25fd179
--- /dev/null
+++ b/gps/utils/loc_timer.h
@@ -0,0 +1,73 @@
+/* Copyright (c) 2013,2015 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef __LOC_DELAY_H__
+#define __LOC_DELAY_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+#include <stddef.h>
+#include <platform_lib_includes.h>
+/*
+    user_data: client context pointer, passthrough. Originally received
+               from calling client when loc_timer_start() is called.
+    result:    0 if timer successfully timed out; else timer failed.
+*/
+typedef void (*loc_timer_callback)(void *user_data, int32_t result);
+
+
+/*
+    delay_msec:         timeout value for the timer.
+    cb_func:            callback function pointer, implemented by client.
+                        Can not be NULL.
+    user_data:          client context pointer, passthrough.  Will be
+                        returned when loc_timer_callback() is called.
+    wakeOnExpire:       true if to wake up CPU (if sleeping) upon timer
+                                expiration and notify the client.
+                        false if to wait until next time CPU wakes up (if
+                                 sleeping) and then notify the client.
+    Returns the handle, which can be used to stop the timer
+                        NULL, if timer start fails (e.g. if cb_func is NULL).
+*/
+void* loc_timer_start(uint64_t delay_msec,
+                      loc_timer_callback cb_func,
+                      void *user_data,
+                      bool wake_on_expire=false);
+
+/*
+    handle becomes invalid upon the return of the callback
+*/
+void loc_timer_stop(void*& handle);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif //__LOC_DELAY_H__
diff --git a/gps/utils/log_util.h b/gps/utils/log_util.h
new file mode 100644
index 0000000..7eb338a
--- /dev/null
+++ b/gps/utils/log_util.h
@@ -0,0 +1,173 @@
+/* Copyright (c) 2011-2014 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef __LOG_UTIL_H__
+#define __LOG_UTIL_H__
+
+#ifndef USE_GLIB
+#include <utils/Log.h>
+#endif /* USE_GLIB */
+
+#ifdef USE_GLIB
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#ifndef LOG_TAG
+#define LOG_TAG "GPS_UTILS"
+
+#endif  // LOG_TAG
+
+#endif /* USE_GLIB */
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/*=============================================================================
+ *
+ *                         LOC LOGGER TYPE DECLARATION
+ *
+ *============================================================================*/
+/* LOC LOGGER */
+typedef struct loc_logger_s
+{
+  unsigned long  DEBUG_LEVEL;
+  unsigned long  TIMESTAMP;
+} loc_logger_s_type;
+
+/*=============================================================================
+ *
+ *                               EXTERNAL DATA
+ *
+ *============================================================================*/
+extern loc_logger_s_type loc_logger;
+
+// Logging Improvements
+extern const char *loc_logger_boolStr[];
+
+extern const char *boolStr[];
+extern const char VOID_RET[];
+extern const char FROM_AFW[];
+extern const char TO_MODEM[];
+extern const char FROM_MODEM[];
+extern const char TO_AFW[];
+extern const char EXIT_TAG[];
+extern const char ENTRY_TAG[];
+extern const char EXIT_ERROR_TAG[];
+
+/*=============================================================================
+ *
+ *                        MODULE EXPORTED FUNCTIONS
+ *
+ *============================================================================*/
+extern void loc_logger_init(unsigned long debug, unsigned long timestamp);
+extern char* get_timestamp(char* str, unsigned long buf_size);
+
+#ifndef DEBUG_DMN_LOC_API
+
+/* LOGGING MACROS */
+/*loc_logger.DEBUG_LEVEL is initialized to 0xff in loc_cfg.cpp
+  if that value remains unchanged, it means gps.conf did not
+  provide a value and we default to the initial value to use
+  Android's logging levels*/
+#define IF_LOC_LOGE if((loc_logger.DEBUG_LEVEL >= 1) && (loc_logger.DEBUG_LEVEL <= 5))
+#define IF_LOC_LOGW if((loc_logger.DEBUG_LEVEL >= 2) && (loc_logger.DEBUG_LEVEL <= 5))
+#define IF_LOC_LOGI if((loc_logger.DEBUG_LEVEL >= 3) && (loc_logger.DEBUG_LEVEL <= 5))
+#define IF_LOC_LOGD if((loc_logger.DEBUG_LEVEL >= 4) && (loc_logger.DEBUG_LEVEL <= 5))
+#define IF_LOC_LOGV if((loc_logger.DEBUG_LEVEL >= 5) && (loc_logger.DEBUG_LEVEL <= 5))
+
+#define LOC_LOGE(...) IF_LOC_LOGE { ALOGE(__VA_ARGS__); }
+#define LOC_LOGW(...) IF_LOC_LOGW { ALOGW(__VA_ARGS__); }
+#define LOC_LOGI(...) IF_LOC_LOGI { ALOGI(__VA_ARGS__); }
+#define LOC_LOGD(...) IF_LOC_LOGD { ALOGD(__VA_ARGS__); }
+#define LOC_LOGV(...) IF_LOC_LOGV { ALOGV(__VA_ARGS__); }
+
+#else /* DEBUG_DMN_LOC_API */
+
+#define LOC_LOGE(...) ALOGE(__VA_ARGS__)
+#define LOC_LOGW(...) ALOGW(__VA_ARGS__)
+#define LOC_LOGI(...) ALOGI(__VA_ARGS__)
+#define LOC_LOGD(...) ALOGD(__VA_ARGS__)
+#define LOC_LOGV(...) ALOGV(__VA_ARGS__)
+
+#endif /* DEBUG_DMN_LOC_API */
+
+/*=============================================================================
+ *
+ *                          LOGGING IMPROVEMENT MACROS
+ *
+ *============================================================================*/
+#define LOG_(LOC_LOG, ID, WHAT, SPEC, VAL)                                    \
+    do {                                                                      \
+        if (loc_logger.TIMESTAMP) {                                           \
+            char ts[32];                                                      \
+            LOC_LOG("[%s] %s %s line %d " #SPEC,                              \
+                     get_timestamp(ts, sizeof(ts)), ID, WHAT, __LINE__, VAL); \
+        } else {                                                              \
+            LOC_LOG("%s %s line %d " #SPEC,                                   \
+                     ID, WHAT, __LINE__, VAL);                                \
+        }                                                                     \
+    } while(0)
+
+#define LOC_LOG_HEAD(fmt) "%s:%d] " fmt
+#define LOC_LOGv(fmt,...) LOC_LOGV(LOC_LOG_HEAD(fmt), __FUNCTION__, __LINE__, ##__VA_ARGS__)
+#define LOC_LOGw(fmt,...) LOC_LOGW(LOC_LOG_HEAD(fmt), __FUNCTION__, __LINE__, ##__VA_ARGS__)
+#define LOC_LOGd(fmt,...) LOC_LOGD(LOC_LOG_HEAD(fmt), __FUNCTION__, __LINE__, ##__VA_ARGS__)
+#define LOC_LOGe(fmt,...) LOC_LOGE(LOC_LOG_HEAD(fmt), __FUNCTION__, __LINE__, ##__VA_ARGS__)
+
+#define LOG_I(ID, WHAT, SPEC, VAL) LOG_(LOC_LOGI, ID, WHAT, SPEC, VAL)
+#define LOG_V(ID, WHAT, SPEC, VAL) LOG_(LOC_LOGV, ID, WHAT, SPEC, VAL)
+#define LOG_E(ID, WHAT, SPEC, VAL) LOG_(LOC_LOGE, ID, WHAT, SPEC, VAL)
+
+#define ENTRY_LOG() LOG_V(ENTRY_TAG, __FUNCTION__, %s, "")
+#define EXIT_LOG(SPEC, VAL) LOG_V(EXIT_TAG, __FUNCTION__, SPEC, VAL)
+#define EXIT_LOG_WITH_ERROR(SPEC, VAL)                       \
+    if (VAL != 0) {                                          \
+        LOG_E(EXIT_ERROR_TAG, __FUNCTION__, SPEC, VAL);          \
+    } else {                                                 \
+        LOG_V(EXIT_TAG, __FUNCTION__, SPEC, VAL);                \
+    }
+
+
+// Used for logging callflow from Android Framework
+#define ENTRY_LOG_CALLFLOW() LOG_I(FROM_AFW, __FUNCTION__, %s, "")
+// Used for logging callflow to Modem
+#define EXIT_LOG_CALLFLOW(SPEC, VAL) LOG_I(TO_MODEM, __FUNCTION__, SPEC, VAL)
+// Used for logging callflow from Modem(TO_MODEM, __FUNCTION__, %s, "")
+#define MODEM_LOG_CALLFLOW(SPEC, VAL) LOG_I(FROM_MODEM, __FUNCTION__, SPEC, VAL)
+// Used for logging callflow to Android Framework
+#define CALLBACK_LOG_CALLFLOW(CB, SPEC, VAL) LOG_I(TO_AFW, CB, SPEC, VAL)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // __LOG_UTIL_H__
diff --git a/gps/utils/msg_q.c b/gps/utils/msg_q.c
new file mode 100644
index 0000000..e8b4ffe
--- /dev/null
+++ b/gps/utils/msg_q.c
@@ -0,0 +1,333 @@
+/* Copyright (c) 2011-2012, 2014, 2017 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation, nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "msg_q.h"
+
+#define LOG_TAG "LocSvc_utils_q"
+#include <platform_lib_includes.h>
+#include "linked_list.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+typedef struct msg_q {
+   void* msg_list;                  /* Linked list to store information */
+   pthread_cond_t  list_cond;       /* Condition variable for waiting on msg queue */
+   pthread_mutex_t list_mutex;      /* Mutex for exclusive access to message queue */
+   int unblocked;                   /* Has this message queue been unblocked? */
+} msg_q;
+
+/*===========================================================================
+FUNCTION    convert_linked_list_err_type
+
+DESCRIPTION
+   Converts from one set of enum values to another.
+
+   linked_list_val: Value to convert to msg_q_enum_type
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Corresponding linked_list_enum_type in msg_q_enum_type
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+static msq_q_err_type convert_linked_list_err_type(linked_list_err_type linked_list_val)
+{
+   switch( linked_list_val )
+   {
+   case eLINKED_LIST_SUCCESS:
+      return eMSG_Q_SUCCESS;
+   case eLINKED_LIST_INVALID_PARAMETER:
+      return eMSG_Q_INVALID_PARAMETER;
+   case eLINKED_LIST_INVALID_HANDLE:
+      return eMSG_Q_INVALID_HANDLE;
+   case eLINKED_LIST_UNAVAILABLE_RESOURCE:
+      return eMSG_Q_UNAVAILABLE_RESOURCE;
+   case eLINKED_LIST_INSUFFICIENT_BUFFER:
+      return eMSG_Q_INSUFFICIENT_BUFFER;
+
+   case eLINKED_LIST_FAILURE_GENERAL:
+   default:
+      return eMSG_Q_FAILURE_GENERAL;
+   }
+}
+
+/* ----------------------- END INTERNAL FUNCTIONS ---------------------------------------- */
+
+/*===========================================================================
+
+  FUNCTION:   msg_q_init
+
+  ===========================================================================*/
+msq_q_err_type msg_q_init(void** msg_q_data)
+{
+   if( msg_q_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid msg_q_data parameter!\n", __FUNCTION__);
+      return eMSG_Q_INVALID_PARAMETER;
+   }
+
+   msg_q* tmp_msg_q;
+   tmp_msg_q = (msg_q*)calloc(1, sizeof(msg_q));
+   if( tmp_msg_q == NULL )
+   {
+      LOC_LOGE("%s: Unable to allocate space for message queue!\n", __FUNCTION__);
+      return eMSG_Q_FAILURE_GENERAL;
+   }
+
+   if( linked_list_init(&tmp_msg_q->msg_list) != 0 )
+   {
+      LOC_LOGE("%s: Unable to initialize storage list!\n", __FUNCTION__);
+      free(tmp_msg_q);
+      return eMSG_Q_FAILURE_GENERAL;
+   }
+
+   if( pthread_mutex_init(&tmp_msg_q->list_mutex, NULL) != 0 )
+   {
+      LOC_LOGE("%s: Unable to initialize list mutex!\n", __FUNCTION__);
+      linked_list_destroy(&tmp_msg_q->msg_list);
+      free(tmp_msg_q);
+      return eMSG_Q_FAILURE_GENERAL;
+   }
+
+   if( pthread_cond_init(&tmp_msg_q->list_cond, NULL) != 0 )
+   {
+      LOC_LOGE("%s: Unable to initialize msg q cond var!\n", __FUNCTION__);
+      linked_list_destroy(&tmp_msg_q->msg_list);
+      pthread_mutex_destroy(&tmp_msg_q->list_mutex);
+      free(tmp_msg_q);
+      return eMSG_Q_FAILURE_GENERAL;
+   }
+
+   tmp_msg_q->unblocked = 0;
+
+   *msg_q_data = tmp_msg_q;
+
+   return eMSG_Q_SUCCESS;
+}
+
+/*===========================================================================
+
+  FUNCTION:   msg_q_init2
+
+  ===========================================================================*/
+const void* msg_q_init2()
+{
+  void* q = NULL;
+  if (eMSG_Q_SUCCESS != msg_q_init(&q)) {
+    q = NULL;
+  }
+  return q;
+}
+
+/*===========================================================================
+
+  FUNCTION:   msg_q_destroy
+
+  ===========================================================================*/
+msq_q_err_type msg_q_destroy(void** msg_q_data)
+{
+   if( msg_q_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid msg_q_data parameter!\n", __FUNCTION__);
+      return eMSG_Q_INVALID_HANDLE;
+   }
+
+   msg_q* p_msg_q = (msg_q*)*msg_q_data;
+
+   linked_list_destroy(&p_msg_q->msg_list);
+   pthread_mutex_destroy(&p_msg_q->list_mutex);
+   pthread_cond_destroy(&p_msg_q->list_cond);
+
+   p_msg_q->unblocked = 0;
+
+   free(*msg_q_data);
+   *msg_q_data = NULL;
+
+   return eMSG_Q_SUCCESS;
+}
+
+/*===========================================================================
+
+  FUNCTION:   msg_q_snd
+
+  ===========================================================================*/
+msq_q_err_type msg_q_snd(void* msg_q_data, void* msg_obj, void (*dealloc)(void*))
+{
+   msq_q_err_type rv;
+   if( msg_q_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid msg_q_data parameter!\n", __FUNCTION__);
+      return eMSG_Q_INVALID_HANDLE;
+   }
+   if( msg_obj == NULL )
+   {
+      LOC_LOGE("%s: Invalid msg_obj parameter!\n", __FUNCTION__);
+      return eMSG_Q_INVALID_PARAMETER;
+   }
+
+   msg_q* p_msg_q = (msg_q*)msg_q_data;
+
+   pthread_mutex_lock(&p_msg_q->list_mutex);
+   LOC_LOGV("%s: Sending message with handle = %p\n", __FUNCTION__, msg_obj);
+
+   if( p_msg_q->unblocked )
+   {
+      LOC_LOGE("%s: Message queue has been unblocked.\n", __FUNCTION__);
+      pthread_mutex_unlock(&p_msg_q->list_mutex);
+      return eMSG_Q_UNAVAILABLE_RESOURCE;
+   }
+
+   rv = convert_linked_list_err_type(linked_list_add(p_msg_q->msg_list, msg_obj, dealloc));
+
+   /* Show data is in the message queue. */
+   pthread_cond_signal(&p_msg_q->list_cond);
+
+   pthread_mutex_unlock(&p_msg_q->list_mutex);
+
+   LOC_LOGV("%s: Finished Sending message with handle = %p\n", __FUNCTION__, msg_obj);
+
+   return rv;
+}
+
+/*===========================================================================
+
+  FUNCTION:   msg_q_rcv
+
+  ===========================================================================*/
+msq_q_err_type msg_q_rcv(void* msg_q_data, void** msg_obj)
+{
+   msq_q_err_type rv;
+   if( msg_q_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid msg_q_data parameter!\n", __FUNCTION__);
+      return eMSG_Q_INVALID_HANDLE;
+   }
+
+   if( msg_obj == NULL )
+   {
+      LOC_LOGE("%s: Invalid msg_obj parameter!\n", __FUNCTION__);
+      return eMSG_Q_INVALID_PARAMETER;
+   }
+
+   msg_q* p_msg_q = (msg_q*)msg_q_data;
+
+   pthread_mutex_lock(&p_msg_q->list_mutex);
+
+   if( p_msg_q->unblocked )
+   {
+      LOC_LOGE("%s: Message queue has been unblocked.\n", __FUNCTION__);
+      pthread_mutex_unlock(&p_msg_q->list_mutex);
+      return eMSG_Q_UNAVAILABLE_RESOURCE;
+   }
+
+   /* Wait for data in the message queue */
+   while( linked_list_empty(p_msg_q->msg_list) && !p_msg_q->unblocked )
+   {
+      pthread_cond_wait(&p_msg_q->list_cond, &p_msg_q->list_mutex);
+   }
+
+   rv = convert_linked_list_err_type(linked_list_remove(p_msg_q->msg_list, msg_obj));
+
+   pthread_mutex_unlock(&p_msg_q->list_mutex);
+
+   LOC_LOGV("%s: Received message %p rv = %d\n", __FUNCTION__, *msg_obj, rv);
+
+   return rv;
+}
+
+/*===========================================================================
+
+  FUNCTION:   msg_q_flush
+
+  ===========================================================================*/
+msq_q_err_type msg_q_flush(void* msg_q_data)
+{
+   msq_q_err_type rv;
+   if ( msg_q_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid msg_q_data parameter!\n", __FUNCTION__);
+      return eMSG_Q_INVALID_HANDLE;
+   }
+
+   msg_q* p_msg_q = (msg_q*)msg_q_data;
+
+   LOC_LOGD("%s: Flushing Message Queue\n", __FUNCTION__);
+
+   pthread_mutex_lock(&p_msg_q->list_mutex);
+
+   /* Remove all elements from the list */
+   rv = convert_linked_list_err_type(linked_list_flush(p_msg_q->msg_list));
+
+   pthread_mutex_unlock(&p_msg_q->list_mutex);
+
+   LOC_LOGD("%s: Message Queue flushed\n", __FUNCTION__);
+
+   return rv;
+}
+
+/*===========================================================================
+
+  FUNCTION:   msg_q_unblock
+
+  ===========================================================================*/
+msq_q_err_type msg_q_unblock(void* msg_q_data)
+{
+   if ( msg_q_data == NULL )
+   {
+      LOC_LOGE("%s: Invalid msg_q_data parameter!\n", __FUNCTION__);
+      return eMSG_Q_INVALID_HANDLE;
+   }
+
+   msg_q* p_msg_q = (msg_q*)msg_q_data;
+   pthread_mutex_lock(&p_msg_q->list_mutex);
+
+   if( p_msg_q->unblocked )
+   {
+      LOC_LOGE("%s: Message queue has been unblocked.\n", __FUNCTION__);
+      pthread_mutex_unlock(&p_msg_q->list_mutex);
+      return eMSG_Q_UNAVAILABLE_RESOURCE;
+   }
+
+   LOC_LOGD("%s: Unblocking Message Queue\n", __FUNCTION__);
+   /* Unblocking message queue */
+   p_msg_q->unblocked = 1;
+
+   /* Allow all the waiters to wake up */
+   pthread_cond_broadcast(&p_msg_q->list_cond);
+
+   pthread_mutex_unlock(&p_msg_q->list_mutex);
+
+   LOC_LOGD("%s: Message Queue unblocked\n", __FUNCTION__);
+
+   return eMSG_Q_SUCCESS;
+}
diff --git a/gps/utils/msg_q.h b/gps/utils/msg_q.h
new file mode 100644
index 0000000..453b8ce
--- /dev/null
+++ b/gps/utils/msg_q.h
@@ -0,0 +1,207 @@
+/* Copyright (c) 2011, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __MSG_Q_H__
+#define __MSG_Q_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include <stdlib.h>
+
+/** Linked List Return Codes */
+typedef enum
+{
+  eMSG_Q_SUCCESS                             = 0,
+     /**< Request was successful. */
+  eMSG_Q_FAILURE_GENERAL                     = -1,
+     /**< Failed because of a general failure. */
+  eMSG_Q_INVALID_PARAMETER                   = -2,
+     /**< Failed because the request contained invalid parameters. */
+  eMSG_Q_INVALID_HANDLE                      = -3,
+     /**< Failed because an invalid handle was specified. */
+  eMSG_Q_UNAVAILABLE_RESOURCE                = -4,
+     /**< Failed because an there were not enough resources. */
+  eMSG_Q_INSUFFICIENT_BUFFER                 = -5,
+     /**< Failed because an the supplied buffer was too small. */
+}msq_q_err_type;
+
+/*===========================================================================
+FUNCTION    msg_q_init
+
+DESCRIPTION
+   Initializes internal structures for message queue.
+
+   msg_q_data: pointer to an opaque Q handle to be returned; NULL if fails
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+msq_q_err_type msg_q_init(void** msg_q_data);
+
+/*===========================================================================
+FUNCTION    msg_q_init2
+
+DESCRIPTION
+   Initializes internal structures for message queue.
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   opaque handle to the Q created; NULL if create fails
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+const void* msg_q_init2();
+
+/*===========================================================================
+FUNCTION    msg_q_destroy
+
+DESCRIPTION
+   Releases internal structures for message queue.
+
+   msg_q_data: State of message queue to be released.
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+msq_q_err_type msg_q_destroy(void** msg_q_data);
+
+/*===========================================================================
+FUNCTION    msg_q_snd
+
+DESCRIPTION
+   Sends data to the message queue. The passed in data pointer
+   is not modified or freed. Passed in msg_obj is expected to live throughout
+   the use of the msg_q (i.e. data is not allocated internally)
+
+   msg_q_data: Message Queue to add the element to.
+   msgp:       Pointer to data to add into message queue.
+   dealloc:    Function used to deallocate memory for this element. Pass NULL
+               if you do not want data deallocated during a flush operation
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+msq_q_err_type msg_q_snd(void* msg_q_data, void* msg_obj, void (*dealloc)(void*));
+
+/*===========================================================================
+FUNCTION    msg_q_rcv
+
+DESCRIPTION
+   Retrieves data from the message queue. msg_obj is the oldest message received
+   and pointer is simply removed from message queue.
+
+   msg_q_data: Message Queue to copy data from into msgp.
+   msg_obj:    Pointer to space to copy msg_q contents to.
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+msq_q_err_type msg_q_rcv(void* msg_q_data, void** msg_obj);
+
+/*===========================================================================
+FUNCTION    msg_q_flush
+
+DESCRIPTION
+   Function removes all elements from the message queue.
+
+   msg_q_data: Message Queue to remove elements from.
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+msq_q_err_type msg_q_flush(void* msg_q_data);
+
+/*===========================================================================
+FUNCTION    msg_q_unblock
+
+DESCRIPTION
+   This function will stop use of the message queue. All waiters will wake up
+   and likely receive nothing from the queue resulting in a negative return
+   value. The message queue can no longer be used until it is destroyed
+   and initialized again after calling this function.
+
+   msg_q_data: Message queue to unblock.
+
+DEPENDENCIES
+   N/A
+
+RETURN VALUE
+   Look at error codes above.
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+msq_q_err_type msg_q_unblock(void* msg_q_data);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __MSG_Q_H__ */
diff --git a/gps/utils/platform_lib_abstractions/Android.mk b/gps/utils/platform_lib_abstractions/Android.mk
new file mode 100644
index 0000000..b923a4c
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/Android.mk
@@ -0,0 +1,5 @@
+ifneq ($(BUILD_TINY_ANDROID),true)
+
+include $(call all-subdir-makefiles)
+
+endif
diff --git a/gps/utils/platform_lib_abstractions/elapsed_millis_since_boot.cpp b/gps/utils/platform_lib_abstractions/elapsed_millis_since_boot.cpp
new file mode 100644
index 0000000..6c183a8
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/elapsed_millis_since_boot.cpp
@@ -0,0 +1,46 @@
+/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <sys/time.h>
+#include "platform_lib_time.h"
+
+int64_t systemTime(int /*clock*/)
+{
+    struct timeval t;
+    t.tv_sec = t.tv_usec = 0;
+    gettimeofday(&t, NULL);
+    return t.tv_sec*1000000LL + t.tv_usec;
+}
+
+
+int64_t elapsedMillisSinceBoot()
+{
+    int64_t t_us = systemTime(0);
+    return (int64_t) t_us / 1000LL;
+}
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/Android.mk b/gps/utils/platform_lib_abstractions/loc_pla/Android.mk
new file mode 100644
index 0000000..b923a4c
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/Android.mk
@@ -0,0 +1,5 @@
+ifneq ($(BUILD_TINY_ANDROID),true)
+
+include $(call all-subdir-makefiles)
+
+endif
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/Makefile.am b/gps/utils/platform_lib_abstractions/loc_pla/Makefile.am
new file mode 100644
index 0000000..8996763
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/Makefile.am
@@ -0,0 +1,10 @@
+# Makefile.am for gps loc-pla
+#
+
+ACLOCAL_AMFLAGS = -I m4
+
+SUBDIRS = src
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = loc-pla.pc
+EXTRA_DIST = $(pkgconfig_DATA)
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/configure.ac b/gps/utils/platform_lib_abstractions/loc_pla/configure.ac
new file mode 100644
index 0000000..a8b892b
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/configure.ac
@@ -0,0 +1,61 @@
+# configure.ac -- Autoconf script for gps loc-pla
+#
+# Process this file with autoconf to produce a configure script
+
+# Requires autoconf tool later than 2.61
+AC_PREREQ(2.61)
+# Initialize the gps loc-pla package version 1.0.0
+AC_INIT([loc-pla],1.0.0)
+# Does not strictly follow GNU Coding standards
+AM_INIT_AUTOMAKE([foreign])
+# Disables auto rebuilding of configure, Makefile.ins
+AM_MAINTAINER_MODE
+# Verifies the --srcdir is correct by checking for the path
+AC_CONFIG_SRCDIR([include/platform_lib_includes.h])
+# defines some macros variable to be included by source
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_MACRO_DIR([m4])
+
+# Checks for programs.
+AC_PROG_LIBTOOL
+AC_PROG_CXX
+AC_PROG_CC
+AM_PROG_CC_C_O
+AC_PROG_AWK
+AC_PROG_CPP
+AC_PROG_INSTALL
+AC_PROG_LN_S
+AC_PROG_MAKE_SET
+PKG_PROG_PKG_CONFIG
+
+# Checks for libraries.
+PKG_CHECK_MODULES([LOCSTUB], [loc-stub])
+AC_SUBST([LOCSTUB_CFLAGS])
+AC_SUBST([LOCSTUB_LIBS])
+
+AC_ARG_WITH([glib],
+      AC_HELP_STRING([--with-glib],
+         [enable glib, building HLOS systems which use glib]))
+
+if (test "x${with_glib}" = "xyes"); then
+        AC_DEFINE(ENABLE_USEGLIB, 1, [Define if HLOS systems uses glib])
+        PKG_CHECK_MODULES(GTHREAD, gthread-2.0 >= 2.16, dummy=yes,
+                                AC_MSG_ERROR(GThread >= 2.16 is required))
+        PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.16, dummy=yes,
+                                AC_MSG_ERROR(GLib >= 2.16 is required))
+        GLIB_CFLAGS="$GLIB_CFLAGS $GTHREAD_CFLAGS"
+        GLIB_LIBS="$GLIB_LIBS $GTHREAD_LIBS"
+
+        AC_SUBST(GLIB_CFLAGS)
+        AC_SUBST(GLIB_LIBS)
+fi
+
+AM_CONDITIONAL(USE_GLIB, test "x${with_glib}" = "xyes")
+
+AC_CONFIG_FILES([ \
+        Makefile \
+        src/Makefile \
+        loc-pla.pc \
+        ])
+
+AC_OUTPUT
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_gettid.h b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_gettid.h
new file mode 100644
index 0000000..340c3c5
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_gettid.h
@@ -0,0 +1,45 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PLATFORM_LIB_GETTID_H__
+#define __PLATFORM_LIB_GETTID_H__
+
+#include <sys/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#ifdef USE_GLIB
+const char* getprogname();
+#endif /* USE_GLIB */
+
+pid_t platform_lib_abstraction_gettid();
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* __PLATFORM_LIB_GETTID_H__ */
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_includes.h b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_includes.h
new file mode 100644
index 0000000..ebb7119
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_includes.h
@@ -0,0 +1,39 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PLATFORM_LIB_INCLUDES_H__
+#define __PLATFORM_LIB_INCLUDES_H__
+
+#include "platform_lib_gettid.h"
+#include "platform_lib_log_util.h"
+#include "platform_lib_macros.h"
+#include "platform_lib_property_service.h"
+#include "platform_lib_sched_policy.h"
+#include "platform_lib_time.h"
+
+#endif /* __PLATFORM_LIB_INCLUDES_H__ */
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_log_util.h b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_log_util.h
new file mode 100644
index 0000000..26d3c29
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_log_util.h
@@ -0,0 +1,174 @@
+/* Copyright (c) 2011-2014 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PLATFORM_LIB_LOG_UTIL_H__
+#define __PLATFORM_LIB_LOG_UTIL_H__
+
+#include "platform_lib_macros.h"
+
+#ifndef USE_GLIB
+#include <log_util.h>
+#else
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#ifndef LOG_TAG
+#define LOG_TAG "GPS_UTILS"
+#endif /* LOG_TAG */
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/*=============================================================================
+ *
+ *                         LOC LOGGER TYPE DECLARATION
+ *
+ *============================================================================*/
+/* LOC LOGGER */
+typedef struct loc_logger_s
+{
+  unsigned long  DEBUG_LEVEL;
+  unsigned long  TIMESTAMP;
+} loc_logger_s_type;
+
+/*=============================================================================
+ *
+ *                               EXTERNAL DATA
+ *
+ *============================================================================*/
+extern loc_logger_s_type loc_logger;
+
+// Logging Improvements
+extern const char *loc_logger_boolStr[];
+
+extern const char *boolStr[];
+extern const char VOID_RET[];
+extern const char FROM_AFW[];
+extern const char TO_MODEM[];
+extern const char FROM_MODEM[];
+extern const char TO_AFW[];
+extern const char EXIT_TAG[];
+extern const char ENTRY_TAG[];
+extern const char EXIT_ERROR_TAG[];
+
+/*=============================================================================
+ *
+ *                        MODULE EXPORTED FUNCTIONS
+ *
+ *============================================================================*/
+void loc_logger_init(unsigned long debug, unsigned long timestamp);
+char* get_timestamp(char* str, unsigned long buf_size);
+
+#ifndef DEBUG_DMN_LOC_API
+
+/* LOGGING MACROS */
+/*loc_logger.DEBUG_LEVEL is initialized to 0xff in loc_cfg.cpp
+  if that value remains unchanged, it means gps.conf did not
+  provide a value and we default to the initial value to use
+  Android's logging levels*/
+#define IF_LOC_LOGE if((loc_logger.DEBUG_LEVEL >= 1) && (loc_logger.DEBUG_LEVEL <= 5))
+#define IF_LOC_LOGW if((loc_logger.DEBUG_LEVEL >= 2) && (loc_logger.DEBUG_LEVEL <= 5))
+#define IF_LOC_LOGI if((loc_logger.DEBUG_LEVEL >= 3) && (loc_logger.DEBUG_LEVEL <= 5))
+#define IF_LOC_LOGD if((loc_logger.DEBUG_LEVEL >= 4) && (loc_logger.DEBUG_LEVEL <= 5))
+#define IF_LOC_LOGV if((loc_logger.DEBUG_LEVEL >= 5) && (loc_logger.DEBUG_LEVEL <= 5))
+
+#define LOC_LOGE(...) IF_LOC_LOGE { ALOGE(__VA_ARGS__); }
+#define LOC_LOGW(...) IF_LOC_LOGW { ALOGW(__VA_ARGS__); }
+#define LOC_LOGI(...) IF_LOC_LOGI { ALOGI(__VA_ARGS__); }
+#define LOC_LOGD(...) IF_LOC_LOGD { ALOGD(__VA_ARGS__); }
+#define LOC_LOGV(...) IF_LOC_LOGV { ALOGV(__VA_ARGS__); }
+
+#else /* DEBUG_DMN_LOC_API */
+
+#define LOC_LOGE(...) ALOGE(__VA_ARGS__)
+#define LOC_LOGW(...) ALOGW(__VA_ARGS__)
+#define LOC_LOGI(...) ALOGI(__VA_ARGS__)
+#define LOC_LOGD(...) ALOGD(__VA_ARGS__)
+#define LOC_LOGV(...) ALOGV(__VA_ARGS__)
+
+#endif /* DEBUG_DMN_LOC_API */
+
+/*=============================================================================
+ *
+ *                          LOGGING IMPROVEMENT MACROS
+ *
+ *============================================================================*/
+#define LOG_(LOC_LOG, ID, WHAT, SPEC, VAL)                                    \
+    do {                                                                      \
+        if (loc_logger.TIMESTAMP) {                                           \
+            char ts[32];                                                      \
+            LOC_LOG("[%s] %s %s line %d " #SPEC,                              \
+                     get_timestamp(ts, sizeof(ts)), ID, WHAT, __LINE__, VAL); \
+        } else {                                                              \
+            LOC_LOG("%s %s line %d " #SPEC,                                   \
+                     ID, WHAT, __LINE__, VAL);                                \
+        }                                                                     \
+    } while(0)
+
+#define LOC_LOG_HEAD(fmt) "%s:%d] " fmt
+#define LOC_LOGv(fmt,...) LOC_LOGV(LOC_LOG_HEAD(fmt), __FUNCTION__, __LINE__, ##__VA_ARGS__)
+#define LOC_LOGw(fmt,...) LOC_LOGW(LOC_LOG_HEAD(fmt), __FUNCTION__, __LINE__, ##__VA_ARGS__)
+#define LOC_LOGd(fmt,...) LOC_LOGD(LOC_LOG_HEAD(fmt), __FUNCTION__, __LINE__, ##__VA_ARGS__)
+#define LOC_LOGe(fmt,...) LOC_LOGE(LOC_LOG_HEAD(fmt), __FUNCTION__, __LINE__, ##__VA_ARGS__)
+
+#define LOG_I(ID, WHAT, SPEC, VAL) LOG_(LOC_LOGI, ID, WHAT, SPEC, VAL)
+#define LOG_V(ID, WHAT, SPEC, VAL) LOG_(LOC_LOGV, ID, WHAT, SPEC, VAL)
+#define LOG_E(ID, WHAT, SPEC, VAL) LOG_(LOC_LOGE, ID, WHAT, SPEC, VAL)
+
+#define ENTRY_LOG() LOG_V(ENTRY_TAG, __FUNCTION__, %s, "")
+#define EXIT_LOG(SPEC, VAL) LOG_V(EXIT_TAG, __FUNCTION__, SPEC, VAL)
+#define EXIT_LOG_WITH_ERROR(SPEC, VAL)                       \
+    if (VAL != 0) {                                          \
+        LOG_E(EXIT_ERROR_TAG, __FUNCTION__, SPEC, VAL);          \
+    } else {                                                 \
+        LOG_V(EXIT_TAG, __FUNCTION__, SPEC, VAL);                \
+    }
+
+
+// Used for logging callflow from Android Framework
+#define ENTRY_LOG_CALLFLOW() LOG_I(FROM_AFW, __FUNCTION__, %s, "")
+// Used for logging callflow to Modem
+#define EXIT_LOG_CALLFLOW(SPEC, VAL) LOG_I(TO_MODEM, __FUNCTION__, SPEC, VAL)
+// Used for logging callflow from Modem(TO_MODEM, __FUNCTION__, %s, "")
+#define MODEM_LOG_CALLFLOW(SPEC, VAL) LOG_I(FROM_MODEM, __FUNCTION__, SPEC, VAL)
+// Used for logging callflow to Android Framework
+#define CALLBACK_LOG_CALLFLOW(CB, SPEC, VAL) LOG_I(TO_AFW, CB, SPEC, VAL)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* USE_GLIB */
+
+#endif /* __PLATFORM_LIB_LOG_UTIL_H__ */
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_macros.h b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_macros.h
new file mode 100644
index 0000000..d0795eb
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_macros.h
@@ -0,0 +1,85 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PLATFORM_LIB_MACROS_H__
+#define __PLATFORM_LIB_MACROS_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef USE_GLIB
+#include <sys/time.h>
+#include <string.h>
+#include <stdlib.h>
+#ifndef OFF_TARGET
+#include <glib.h>
+#define strlcat g_strlcat
+#define strlcpy g_strlcpy
+#else
+#define strlcat strncat
+#define strlcpy strncpy
+#endif
+
+#define TS_PRINTF(format, x...)                                \
+{                                                              \
+  struct timeval tv;                                           \
+  struct timezone tz;                                          \
+  int hh, mm, ss;                                              \
+  gettimeofday(&tv, &tz);                                      \
+  hh = tv.tv_sec/3600%24;                                      \
+  mm = (tv.tv_sec%3600)/60;                                    \
+  ss = tv.tv_sec%60;                                           \
+  fprintf(stdout,"%02d:%02d:%02d.%06ld]" format "\n", hh, mm, ss, tv.tv_usec,##x);    \
+}
+
+#define ALOGE(format, x...) TS_PRINTF("E/%s (%d): " format , LOG_TAG, getpid(), ##x)
+#define ALOGW(format, x...) TS_PRINTF("W/%s (%d): " format , LOG_TAG, getpid(), ##x)
+#define ALOGI(format, x...) TS_PRINTF("I/%s (%d): " format , LOG_TAG, getpid(), ##x)
+#define ALOGD(format, x...) TS_PRINTF("D/%s (%d): " format , LOG_TAG, getpid(), ##x)
+#define ALOGV(format, x...) TS_PRINTF("V/%s (%d): " format , LOG_TAG, getpid(), ##x)
+
+#endif /* USE_GLIB */
+
+
+// Below are the location conf file paths
+extern const char LOC_PATH_GPS_CONF[];
+extern const char LOC_PATH_IZAT_CONF[];
+extern const char LOC_PATH_FLP_CONF[];
+extern const char LOC_PATH_LOWI_CONF[];
+extern const char LOC_PATH_SAP_CONF[];
+extern const char LOC_PATH_APDR_CONF[];
+extern const char LOC_PATH_XTWIFI_CONF[];
+extern const char LOC_PATH_QUIPC_CONF[];
+
+
+#ifdef __cplusplus
+}
+#endif /*__cplusplus */
+
+#endif /* __PLATFORM_LIB_MACROS_H__ */
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_property_service.h b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_property_service.h
new file mode 100644
index 0000000..ed2041f
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_property_service.h
@@ -0,0 +1,44 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PLATFORM_LIB_PROPERTY_SERVICE_H__
+#define __PLATFORM_LIB_PROPERTY_SERVICE_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#ifndef PROPERTY_VALUE_MAX
+#define PROPERTY_VALUE_MAX  92
+#endif
+int platform_lib_abstraction_property_get(const char *key, char *value, const char *default_value);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __PLATFORM_LIB_PROPERTY_SERVICE_H__ */
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_sched_policy.h b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_sched_policy.h
new file mode 100644
index 0000000..d10f151
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_sched_policy.h
@@ -0,0 +1,46 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PLATFORM_LIB_SCHED_POLICY_H__
+#define __PLATFORM_LIB_SCHED_POLICY_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+typedef enum {
+    PLA_SP_BACKGROUND = 0,
+    PLA_SP_FOREGROUND = 1,
+} PLASchedPolicy;
+
+int platform_lib_abstraction_set_sched_policy(int tid, PLASchedPolicy policy);
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __PLATFORM_LIB_SCHED_POLICY_H__ */
+
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_time.h b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_time.h
new file mode 100644
index 0000000..ae25ae6
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/include/platform_lib_time.h
@@ -0,0 +1,36 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __PLATFORM_LIB_TIME_H__
+#define __PLATFORM_LIB_TIME_H__
+
+#include <stdint.h>
+int64_t platform_lib_abstraction_elapsed_millis_since_boot();
+int64_t platform_lib_abstraction_elapsed_micros_since_boot();
+
+#endif /* __PLATFORM_LIB_TIME_H__ */
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/loc-pla.pc.in b/gps/utils/platform_lib_abstractions/loc_pla/loc-pla.pc.in
new file mode 100644
index 0000000..1aad2f4
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/loc-pla.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: loc-pla
+Description: QTI GPS Location Platform Library Abstractions
+Version: @VERSION@
+Libs: -L${libdir} -lloc_pla
+Cflags: -I${includedir}/loc-pla
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/src/Android.mk b/gps/utils/platform_lib_abstractions/loc_pla/src/Android.mk
new file mode 100644
index 0000000..ab13717
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/src/Android.mk
@@ -0,0 +1,68 @@
+GNSS_CFLAGS := \
+    -Werror \
+    -Wno-error=unused-parameter \
+    -Wno-error=format \
+    -Wno-error=macro-redefined \
+    -Wno-error=reorder \
+    -Wno-error=missing-braces \
+    -Wno-error=self-assign \
+    -Wno-error=enum-conversion \
+    -Wno-error=logical-op-parentheses \
+    -Wno-error=null-arithmetic \
+    -Wno-error=null-conversion \
+    -Wno-error=parentheses-equality \
+    -Wno-error=undefined-bool-conversion \
+    -Wno-error=tautological-compare \
+    -Wno-error=switch \
+    -Wno-error=date-time
+
+ifneq ($(BOARD_VENDOR_QCOM_GPS_LOC_API_HARDWARE),)
+ifneq ($(BUILD_TINY_ANDROID),true)
+#Compile this library only for builds with the latest modem image
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+## Libs
+LOCAL_SHARED_LIBRARIES := \
+    libutils \
+    libcutils \
+    liblog \
+    libloc_stub
+
+LOCAL_SRC_FILES += \
+        platform_lib_gettid.cpp \
+        platform_lib_log_util.cpp \
+        platform_lib_property_service.cpp \
+        platform_lib_sched_policy.cpp \
+        platform_lib_time.cpp
+
+LOCAL_CFLAGS += \
+     -fno-short-enums \
+     -D_ANDROID_ \
+     -std=c++11
+
+## Includes
+LOCAL_C_INCLUDES:= \
+    $(LOCAL_PATH)/../include
+LOCAL_HEADER_LIBRARIES := \
+    libgps.utils_headers \
+    libloc_stub_headers
+
+LOCAL_MODULE := libloc_pla
+LOCAL_MODULE_PATH_32 := $(TARGET_OUT_VENDOR)/lib
+LOCAL_MODULE_PATH_64 := $(TARGET_OUT_VENDOR)/lib64
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_PRELINK_MODULE := false
+LOCAL_CFLAGS += $(GNSS_CFLAGS)
+include $(BUILD_SHARED_LIBRARY)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libloc_pla_headers
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/../include
+include $(BUILD_HEADER_LIBRARY)
+
+endif # not BUILD_TINY_ANDROID
+endif # BOARD_VENDOR_QCOM_GPS_LOC_API_HARDWARE
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/src/Makefile.am b/gps/utils/platform_lib_abstractions/loc_pla/src/Makefile.am
new file mode 100644
index 0000000..30c4b4c
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/src/Makefile.am
@@ -0,0 +1,39 @@
+AM_CFLAGS = \
+     $(LOCSTUB_CFLAGS) \
+     -I../include \
+     -D__func__=__PRETTY_FUNCTION__ \
+     -fno-short-enums
+
+h_sources = \
+    ../include/platform_lib_gettid.h \
+    ../include/platform_lib_includes.h \
+    ../include/platform_lib_log_util.h \
+    ../include/platform_lib_macros.h \
+    ../include/platform_lib_property_service.h \
+    ../include/platform_lib_sched_policy.h \
+    ../include/platform_lib_time.h
+
+library_includedir = $(pkgincludedir)
+library_include_HEADERS = $(h_sources)
+
+libloc_pla_la_SOURCES = \
+    platform_lib_gettid.cpp \
+    platform_lib_log_util.cpp \
+    platform_lib_property_service.cpp \
+    platform_lib_sched_policy.cpp \
+    platform_lib_time.cpp
+
+if USE_GLIB
+libloc_pla_la_CFLAGS = -DUSE_GLIB $(AM_CFLAGS) @GLIB_CFLAGS@
+libloc_pla_la_LDFLAGS = -lstdc++ -Wl,-z,defs -lpthread @GLIB_LIBS@ -shared -version-info 1:0:0
+libloc_pla_la_CPPFLAGS = -DUSE_GLIB $(AM_CFLAGS) $(AM_CPPFLAGS) @GLIB_CFLAGS@
+else
+libloc_pla_la_CFLAGS = $(AM_CFLAGS)
+libloc_pla_la_LDFLAGS = -Wl,-z,defs -lpthread -shared -version-info 1:0:0
+libloc_pla_la_CPPFLAGS = $(AM_CFLAGS) $(AM_CPPFLAGS)
+endif
+
+libloc_pla_la_LIBADD = -lstdc++ -ldl -llog $(LOCSTUB_LIBS)
+
+#Create and Install libraries
+lib_LTLIBRARIES = libloc_pla.la
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_gettid.cpp b/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_gettid.cpp
new file mode 100644
index 0000000..1b7aa32
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_gettid.cpp
@@ -0,0 +1,46 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "platform_lib_gettid.h"
+
+#ifdef USE_GLIB
+#include <loc_stub_gettid.h>
+
+#include <errno.h>
+const char* getprogname() {
+    return program_invocation_short_name;
+}
+
+#else
+#include <unistd.h>
+#endif /* USE_GLIB */
+
+pid_t platform_lib_abstraction_gettid()
+{
+    return gettid();
+}
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_log_util.cpp b/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_log_util.cpp
new file mode 100644
index 0000000..3cb51a3
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_log_util.cpp
@@ -0,0 +1,78 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "platform_lib_log_util.h"
+#include "platform_lib_macros.h"
+
+char * get_timestamp(char *str, unsigned long buf_size)
+{
+  struct timeval tv;
+  struct timezone tz;
+  int hh, mm, ss;
+  gettimeofday(&tv, &tz);
+  hh = tv.tv_sec/3600%24;
+  mm = (tv.tv_sec%3600)/60;
+  ss = tv.tv_sec%60;
+  snprintf(str, buf_size, "%02d:%02d:%02d.%06ld", hh, mm, ss, tv.tv_usec);
+  return str;
+}
+
+// Below are the location conf file paths
+#ifdef __ANDROID__
+
+#define LOC_PATH_GPS_CONF_STR      "/vendor/etc/gps.conf"
+#define LOC_PATH_IZAT_CONF_STR     "/vendor/etc/izat.conf"
+#define LOC_PATH_FLP_CONF_STR      "/vendor/etc/flp.conf"
+#define LOC_PATH_LOWI_CONF_STR     "/vendor/etc/lowi.conf"
+#define LOC_PATH_SAP_CONF_STR      "/vendor/etc/sap.conf"
+#define LOC_PATH_APDR_CONF_STR     "/vendor/etc/apdr.conf"
+#define LOC_PATH_XTWIFI_CONF_STR   "/vendor/etc/xtwifi.conf"
+#define LOC_PATH_QUIPC_CONF_STR    "/vendor/etc/quipc.conf"
+
+#else
+
+#define LOC_PATH_GPS_CONF_STR      "/etc/gps.conf"
+#define LOC_PATH_IZAT_CONF_STR     "/etc/izat.conf"
+#define LOC_PATH_FLP_CONF_STR      "/etc/flp.conf"
+#define LOC_PATH_LOWI_CONF_STR     "/etc/lowi.conf"
+#define LOC_PATH_SAP_CONF_STR      "/etc/sap.conf"
+#define LOC_PATH_APDR_CONF_STR     "/etc/apdr.conf"
+#define LOC_PATH_XTWIFI_CONF_STR   "/etc/xtwifi.conf"
+#define LOC_PATH_QUIPC_CONF_STR    "/etc/quipc.conf"
+
+#endif // __ANDROID__
+
+// Reference below arrays wherever needed to avoid duplicating
+// same conf path string over and again in location code.
+const char LOC_PATH_GPS_CONF[]    = LOC_PATH_GPS_CONF_STR;
+const char LOC_PATH_IZAT_CONF[]   = LOC_PATH_IZAT_CONF_STR;
+const char LOC_PATH_FLP_CONF[]    = LOC_PATH_FLP_CONF_STR;
+const char LOC_PATH_LOWI_CONF[]   = LOC_PATH_LOWI_CONF_STR;
+const char LOC_PATH_SAP_CONF[]    = LOC_PATH_SAP_CONF_STR;
+const char LOC_PATH_APDR_CONF[]   = LOC_PATH_APDR_CONF_STR;
+const char LOC_PATH_XTWIFI_CONF[] = LOC_PATH_XTWIFI_CONF_STR;
+const char LOC_PATH_QUIPC_CONF[]  = LOC_PATH_QUIPC_CONF_STR;
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_property_service.cpp b/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_property_service.cpp
new file mode 100644
index 0000000..dccdebc
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_property_service.cpp
@@ -0,0 +1,39 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifdef USE_GLIB
+#include <loc_stub_property_service.h>
+#else
+#include <cutils/properties.h>
+#endif /* USE_GLIB */
+
+#include "platform_lib_property_service.h"
+
+int platform_lib_abstraction_property_get(const char *key, char *value, const char *default_value)
+{
+    return property_get(key, value, default_value);
+}
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_sched_policy.cpp b/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_sched_policy.cpp
new file mode 100644
index 0000000..ba6b350
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_sched_policy.cpp
@@ -0,0 +1,41 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "platform_lib_sched_policy.h"
+
+#ifdef USE_GLIB
+#include <loc_stub_sched_policy.h>
+#else
+#include <cutils/sched_policy.h>
+#endif /* USE_GLIB */
+
+int platform_lib_abstraction_set_sched_policy(int tid, PLASchedPolicy policy)
+{
+    return set_sched_policy(tid, (SchedPolicy)policy);
+}
+
diff --git a/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_time.cpp b/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_time.cpp
new file mode 100644
index 0000000..3dcd4d3
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_pla/src/platform_lib_time.cpp
@@ -0,0 +1,59 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "platform_lib_time.h"
+
+#ifdef USE_GLIB
+#include <loc_stub_time.h>
+#else
+#include <utils/SystemClock.h>
+#include <utils/Timers.h>
+
+#endif /* USE_GLIB */
+
+int64_t platform_lib_abstraction_elapsed_millis_since_boot()
+{
+#ifdef USE_GLIB
+
+    return elapsedMillisSinceBoot();
+
+#else
+
+    //return android::nanoseconds_to_microseconds(systemTime(SYSTEM_TIME_BOOTTIME))/1000;
+    return nanoseconds_to_microseconds(systemTime(SYSTEM_TIME_BOOTTIME))/1000;
+#endif
+}
+int64_t platform_lib_abstraction_elapsed_micros_since_boot()
+{
+#ifdef USE_GLIB
+    return elapsedMicrosSinceBoot();
+
+#else
+    //return android::nanoseconds_to_microseconds(systemTime(SYSTEM_TIME_BOOTTIME));
+    return nanoseconds_to_microseconds(systemTime(SYSTEM_TIME_BOOTTIME));
+#endif
+}
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/Android.mk b/gps/utils/platform_lib_abstractions/loc_stub/Android.mk
new file mode 100644
index 0000000..b923a4c
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/Android.mk
@@ -0,0 +1,5 @@
+ifneq ($(BUILD_TINY_ANDROID),true)
+
+include $(call all-subdir-makefiles)
+
+endif
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/Makefile.am b/gps/utils/platform_lib_abstractions/loc_stub/Makefile.am
new file mode 100644
index 0000000..d81e363
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/Makefile.am
@@ -0,0 +1,9 @@
+# Makefile.am for gps loc-stub
+
+ACLOCAL_AMFLAGS = -I m4
+
+SUBDIRS = src
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = loc-stub.pc
+EXTRA_DIST = $(pkgconfig_DATA)
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/configure.ac b/gps/utils/platform_lib_abstractions/loc_stub/configure.ac
new file mode 100644
index 0000000..8900f04
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/configure.ac
@@ -0,0 +1,67 @@
+# configure.ac -- Autoconf script for gps loc-stub
+#
+# Process this file with autoconf to produce a configure script
+
+# Requires autoconf tool later than 2.61
+AC_PREREQ(2.61)
+# Initialize the gps loc-stub package version 1.0.0
+AC_INIT([loc-stub],1.0.0)
+# Does not strictly follow GNU Coding standards
+AM_INIT_AUTOMAKE([foreign])
+# Disables auto rebuilding of configure, Makefile.ins
+AM_MAINTAINER_MODE
+# Verifies the --srcdir is correct by checking for the path
+AC_CONFIG_SRCDIR([Makefile.am])
+# defines some macros variable to be included by source
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_MACRO_DIR([m4])
+
+# Checks for programs.
+AC_PROG_LIBTOOL
+AC_PROG_CXX
+AC_PROG_CC
+AM_PROG_CC_C_O
+AC_PROG_AWK
+AC_PROG_CPP
+AC_PROG_INSTALL
+AC_PROG_LN_S
+AC_PROG_MAKE_SET
+PKG_PROG_PKG_CONFIG
+
+# Checks for libraries.
+AC_ARG_WITH([hardware_include],
+                  AC_HELP_STRING([--with-hardware-include=@<:@dir@:>@],
+                                 [Specify the location of the hardware headers]),
+                                 [hardware_incdir=$withval],
+                                 with_hardware_include=no)
+
+if test "x$with_hardware_include" != "xno"; then
+       CPPFLAGS="${CPPFLAGS} -I${hardware_incdir}"
+fi
+
+AC_ARG_WITH([glib],
+      AC_HELP_STRING([--with-glib],
+         [enable glib, building HLOS systems which use glib]))
+
+if (test "x${with_glib}" = "xyes"); then
+        AC_DEFINE(ENABLE_USEGLIB, 1, [Define if HLOS systems uses glib])
+        PKG_CHECK_MODULES(GTHREAD, gthread-2.0 >= 2.16, dummy=yes,
+                                AC_MSG_ERROR(GThread >= 2.16 is required))
+        PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.16, dummy=yes,
+                                AC_MSG_ERROR(GLib >= 2.16 is required))
+        GLIB_CFLAGS="$GLIB_CFLAGS $GTHREAD_CFLAGS"
+        GLIB_LIBS="$GLIB_LIBS $GTHREAD_LIBS"
+
+        AC_SUBST(GLIB_CFLAGS)
+        AC_SUBST(GLIB_LIBS)
+fi
+
+AM_CONDITIONAL(USE_GLIB, test "x${with_glib}" = "xyes")
+
+AC_CONFIG_FILES([ \
+        Makefile \
+        src/Makefile \
+        loc-stub.pc
+        ])
+
+AC_OUTPUT
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_android_runtime.h b/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_android_runtime.h
new file mode 100644
index 0000000..c8764ee
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_android_runtime.h
@@ -0,0 +1,45 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __LOC_STUB_ANDROID_RUNTIME_H__
+#define __LOC_STUB_ANDROID_RUNTIME_H__
+
+#include <pthread.h>
+
+namespace android {
+
+class AndroidRuntime
+{
+public:
+    /** create a new thread that is visible from Java */
+    static pthread_t createJavaThread(const char* name, void (*start)(void *),
+        void* arg);
+};
+
+}
+#endif /* __LOC_STUB_ANDROID_RUNTIME_H__ */
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_gettid.h b/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_gettid.h
new file mode 100644
index 0000000..677bc81
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_gettid.h
@@ -0,0 +1,44 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __LOC_STUB_GETTID_H__
+#define __LOC_STUB_GETTID_H__
+
+#include <pthread.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+pid_t gettid(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LOC_STUB_GETTID_H__ */
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_property_service.h b/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_property_service.h
new file mode 100644
index 0000000..3677cdf
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_property_service.h
@@ -0,0 +1,42 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __LOC_STUB_PROPERTY_SERVICE_H__
+#define __LOC_STUB_PROPERTY_SERVICE_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int property_get(const char *key, char *value, const char *default_value);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __LOC_STUB_PROPERTY_SERVICE_H__ */
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_sched_policy.h b/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_sched_policy.h
new file mode 100644
index 0000000..a42b117
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_sched_policy.h
@@ -0,0 +1,64 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __LOC_STUB_SCHED_POLICY_H__
+#define __LOC_STUB_SCHED_POLICY_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+    SP_BACKGROUND = 0,
+    SP_FOREGROUND = 1,
+} SchedPolicy;
+
+/*===========================================================================
+FUNCTION set_sched_policy
+
+DESCRIPTION
+   Local copy of this function which bypasses android set_sched_policy
+
+DEPENDENCIES
+   None
+
+RETURN VALUE
+   0
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+int set_sched_policy(int tid, SchedPolicy policy);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __LOC_STUB_SCHED_POLICY_H__ */
+
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_time.h b/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_time.h
new file mode 100644
index 0000000..f00a49b
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/include/loc_stub_time.h
@@ -0,0 +1,46 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __LOC_STUB_TIME_H__
+#define __LOC_STUB_TIME_H__
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int64_t systemTime(int clock);
+int64_t elapsedMillisSinceBoot();
+int64_t elapsedMicrosSinceBoot();
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __LOC_STUB_TIME_H__ */
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/loc-stub.pc.in b/gps/utils/platform_lib_abstractions/loc_stub/loc-stub.pc.in
new file mode 100644
index 0000000..c2ae764
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/loc-stub.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: loc-stub
+Description: QTI GPS Location Stub
+Version: @VERSION
+Libs: -L${libdir} -lloc_stub
+Cflags: -I${includedir}/loc-stub
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/src/Android.mk b/gps/utils/platform_lib_abstractions/loc_stub/src/Android.mk
new file mode 100644
index 0000000..08697cb
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/src/Android.mk
@@ -0,0 +1,49 @@
+ifneq ($(BOARD_VENDOR_QCOM_GPS_LOC_API_HARDWARE),)
+ifneq ($(BUILD_TINY_ANDROID),true)
+#Compile this library only for builds with the latest modem image
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+## Libs
+LOCAL_SHARED_LIBRARIES := \
+    libutils \
+    libcutils \
+    liblog
+
+LOCAL_SRC_FILES += \
+        loc_stub_android_runtime.cpp \
+        loc_stub_gettid.cpp \
+        loc_stub_property_service.cpp \
+        loc_stub_sched_policy.cpp \
+        loc_stub_time.cpp
+
+LOCAL_CFLAGS += \
+     -fno-short-enums \
+     -D_ANDROID_ \
+     -std=c++11
+
+
+LOCAL_LDFLAGS += -Wl,--export-dynamic
+
+## Includes
+LOCAL_C_INCLUDES:= \
+    $(LOCAL_PATH)/../include \
+
+LOCAL_MODULE := libloc_stub
+LOCAL_MODULE_PATH_32 := $(TARGET_OUT_VENDOR)/lib
+LOCAL_MODULE_PATH_64 := $(TARGET_OUT_VENDOR)/lib64
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_PRELINK_MODULE := false
+LOCAL_CFLAGS += $(GNSS_CFLAGS)
+include $(BUILD_SHARED_LIBRARY)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libloc_stub_headers
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/../include
+include $(BUILD_HEADER_LIBRARY)
+
+endif # not BUILD_TINY_ANDROID
+endif # BOARD_VENDOR_QCOM_GPS_LOC_API_HARDWARE
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/src/Makefile.am b/gps/utils/platform_lib_abstractions/loc_stub/src/Makefile.am
new file mode 100644
index 0000000..ba823a2
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/src/Makefile.am
@@ -0,0 +1,40 @@
+AM_CFLAGS = \
+     -I../include \
+     -D__func__=__PRETTY_FUNCTION__ \
+     -fno-short-enums
+
+libloc_stub_la_extra_h = \
+     ../include/utils/Log.h
+
+libloc_stub_la_c_sources = \
+     loc_stub_android_runtime.cpp \
+     loc_stub_gettid.cpp \
+     loc_stub_property_service.cpp \
+     loc_stub_sched_policy.cpp \
+     loc_stub_time.cpp
+
+libloc_stub_la_SOURCES = $(libloc_stub_la_c_sources) $(libloc_stub_la_extra_h)
+
+library_include_HEADERS = \
+     ../include/loc_stub_android_runtime.h \
+     ../include/loc_stub_gettid.h \
+     ../include/loc_stub_property_service.h \
+     ../include/loc_stub_sched_policy.h \
+     ../include/loc_stub_time.h
+
+library_includedir = $(pkgincludedir)
+
+if USE_GLIB
+libloc_stub_la_CFLAGS = -DUSE_GLIB $(AM_CFLAGS) @GLIB_CFLAGS@
+libloc_stub_la_LDFLAGS = -lstdc++ -Wl,-z,defs -lpthread @GLIB_LIBS@ -shared -version-info 1:0:0
+libloc_stub_la_CPPFLAGS = -DUSE_GLIB $(AM_CFLAGS) $(AM_CPPFLAGS) @GLIB_CFLAGS@
+else
+libloc_stub_la_CFLAGS = $(AM_CFLAGS)
+libloc_stub_la_LDFLAGS = -Wl,-z,defs -lpthread -shared -version-info 1:0:0
+libloc_stub_la_CPPFLAGS = $(AM_CFLAGS) $(AM_CPPFLAGS)
+endif
+
+libloc_stub_la_LIBADD = -lstdc++ -ldl -llog
+
+#Create and Install libraries
+lib_LTLIBRARIES = libloc_stub.la
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_android_runtime.cpp b/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_android_runtime.cpp
new file mode 100644
index 0000000..068df4e
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_android_runtime.cpp
@@ -0,0 +1,41 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "loc_stub_android_runtime.h"
+
+namespace android {
+
+pthread_t AndroidRuntime::createJavaThread(const char* /*name*/,
+    void (*start)(void *), void* arg)
+{
+    pthread_t threadId = 0;
+    pthread_create(&threadId, NULL, (void *(*)(void*))start, arg);
+    return threadId;
+}
+
+}
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_gettid.cpp b/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_gettid.cpp
new file mode 100644
index 0000000..55ef48a
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_gettid.cpp
@@ -0,0 +1,37 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "loc_stub_gettid.h"
+#include <sys/syscall.h>
+#include <unistd.h>
+
+// Required for off-target environment to compile properly
+pid_t gettid(void)
+{
+    return syscall(SYS_gettid);
+}
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_property_service.cpp b/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_property_service.cpp
new file mode 100644
index 0000000..907ab02
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_property_service.cpp
@@ -0,0 +1,42 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "loc_stub_property_service.h"
+#include <stdio.h>
+#include <string.h>
+
+int property_get(const char *key, char * value, const char */*default_value*/)
+{
+    /* This will disable gps interface
+       value[0] = '1';
+     */
+    if (strcmp(key, "ro.baseband") == 0) {
+        memcpy(value, "msm", 4);
+    }
+    return 0;
+}
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_sched_policy.cpp b/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_sched_policy.cpp
new file mode 100644
index 0000000..5e26245
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_sched_policy.cpp
@@ -0,0 +1,50 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "loc_stub_sched_policy.h"
+
+/*===========================================================================
+FUNCTION set_sched_policy
+
+DESCRIPTION
+   Local copy of this function which bypasses android set_sched_policy
+
+DEPENDENCIES
+   None
+
+RETURN VALUE
+   0
+
+SIDE EFFECTS
+   N/A
+
+===========================================================================*/
+int set_sched_policy(int /*tid*/, SchedPolicy /*policy*/)
+{
+    return 0;
+}
diff --git a/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_time.cpp b/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_time.cpp
new file mode 100644
index 0000000..48149a6
--- /dev/null
+++ b/gps/utils/platform_lib_abstractions/loc_stub/src/loc_stub_time.cpp
@@ -0,0 +1,55 @@
+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "loc_stub_time.h"
+#include <stdlib.h>
+#include <sys/time.h>
+#include <time.h>
+
+int64_t systemTime(int /*clock*/)
+{
+    struct timeval t;
+    t.tv_sec = t.tv_usec = 0;
+    gettimeofday(&t, NULL);
+    return t.tv_sec*1000000LL + t.tv_usec;
+}
+
+int64_t elapsedMicrosSinceBoot()
+{
+    struct timespec ts;
+    int64_t time_ms = 0;
+    clock_gettime(CLOCK_BOOTTIME, &ts);
+    time_ms += (ts.tv_sec * 1000000000LL);     /* Seconds to nanoseconds */
+    time_ms += ts.tv_nsec;   /* Add Nanoseconds  */
+    return time_ms;
+}
+
+int64_t elapsedMillisSinceBoot()
+{
+    return (int64_t) (elapsedMicrosSinceBoot() /1000000LL);
+}