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/* 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__
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