83 lines
2.8 KiB
C++
Executable File
83 lines
2.8 KiB
C++
Executable File
/******************************************************************************
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Copyright (C), 2001-2016, Allwinner Tech. Co., Ltd.
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******************************************************************************
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File Name : Thread.h
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Version : Initial Draft
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Author : Allwinner BU3-PD2 Team
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Created : 2016/06/01
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Last Modified :
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Description : mpi functions implement
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Function List :
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History :
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******************************************************************************/
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#ifndef __IPCLINUX_THREAD_H__
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#define __IPCLINUX_THREAD_H__
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#include <stdint.h>
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#include <sys/types.h>
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#include <time.h>
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#include <pthread.h>
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#include <utils/Mutex.h>
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#include <utils/Condition.h>
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namespace EyeseeLinux {
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class Thread
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{
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public:
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// Create a Thread object, but doesn't create or start the associated
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// thread. See the run() method.
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Thread();
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virtual ~Thread();
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// Start the thread in threadLoop() which needs to be implemented.
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virtual status_t run(const char *name = 0, int priority =0, size_t stack = 0);
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// Ask this object's thread to exit. This function is asynchronous, when the
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// function returns the thread might still be running. Of course, this
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// function can be called from a different thread.
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virtual void requestExit();
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// Good place to do one-time initializations
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virtual status_t readyToRun();
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// Call requestExit() and wait until this object's thread exits.
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// BE VERY CAREFUL of deadlocks. In particular, it would be silly to call
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// this function from this object's thread. Will return WOULD_BLOCK in
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// that case.
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status_t requestExitAndWait();
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// Wait until this object's thread exits. Returns immediately if not yet running.
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// Do not call from this object's thread; will return WOULD_BLOCK in that case.
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status_t join();
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protected:
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// exitPending() returns true if requestExit() has been called.
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bool exitPending() const;
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private:
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// Derived class must implement threadLoop(). The thread starts its life
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// here. There are two ways of using the Thread object:
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// 1) loop: if threadLoop() returns true, it will be called again if
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// requestExit() wasn't called.
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// 2) once: if threadLoop() returns false, the thread will exit upon return.
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virtual bool threadLoop() = 0;
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private:
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Thread& operator=(const Thread&);
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static void *_threadLoop(void* user);
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// always hold mLock when reading or writing
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pthread_t mThread;
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mutable Mutex mLock;
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Condition mThreadExitedCondition;
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status_t mStatus;
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// note that all accesses of mExitPending and mRunning need to hold mLock
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volatile bool mExitPending;
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volatile bool mRunning;
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char* mName;
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}; /* class Thread */
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}; /* namespace EyeseeLinux */
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#endif /* __IPCLINUX_THREAD_H__ */
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