diff options
author | dianlujitao <dianlujitao@lineageos.org> | 2020-02-02 16:40:06 +0800 |
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committer | dianlujitao <dianlujitao@lineageos.org> | 2020-02-15 15:49:59 +0800 |
commit | 570a57c7abc1a0f0e48698821e0061dd2e807dc5 (patch) | |
tree | 345adba6b768011f63e0acb644ee03d87dc944f0 /gps/utils/LocHeap.cpp | |
parent | d292a85ea71f9feb85267c21f1f59057018ffd5a (diff) |
sdm660-common: Remove GPS HAL for subtree import
Change-Id: Ib18b7d867224557562c3f6a4a20c206f0ec30fec
Diffstat (limited to 'gps/utils/LocHeap.cpp')
-rw-r--r-- | gps/utils/LocHeap.cpp | 354 |
1 files changed, 0 insertions, 354 deletions
diff --git a/gps/utils/LocHeap.cpp b/gps/utils/LocHeap.cpp deleted file mode 100644 index d667f14..0000000 --- a/gps/utils/LocHeap.cpp +++ /dev/null @@ -1,354 +0,0 @@ -/* 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 |