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94 lines
1.9 KiB
C++
94 lines
1.9 KiB
C++
////////////////////////////////////////
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// Event.cpp
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//
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// Purpose:
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// 1. Implementation of the CEvent class.
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//
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// Revisions:
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// 07/10/2001 Created
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//
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#if defined(_REENTRANT)
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#include "Event.h"
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namespace Base
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{
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CEvent::CEvent()
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{
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mWaiting = 0;
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mSignaled = false;
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mInitialized = false;
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if (pthread_cond_init( &mCond, NULL ) != 0)
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{
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return;
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}
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if (pthread_mutex_init( &mMutex, NULL ) != 0)
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{
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pthread_cond_destroy( &mCond );
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return;
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}
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mInitialized = true;
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}
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CEvent::~CEvent()
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{
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if (mInitialized)
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{
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pthread_cond_destroy(&mCond);
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pthread_mutex_destroy(&mMutex);
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}
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}
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int32 CEvent::Wait(uint32 timeout)
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{
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if (!mInitialized)
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return CEvent::eWAIT_ERROR;
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int result;
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pthread_mutex_lock(&mMutex);
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if (mSignaled)
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{
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mSignaled = false;
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}
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else if (!timeout)
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{
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mWaiting++;
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result = pthread_cond_wait(&mCond, &mMutex);
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mWaiting--;
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}
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else
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{
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struct timespec wake_time;
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clock_gettime( CLOCK_REALTIME, &wake_time );
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wake_time.tv_sec += timeout/1000;
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wake_time.tv_nsec += (timeout%1000)*1000000;
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// normalize new time
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wake_time.tv_sec += wake_time.tv_nsec / 1000000000;
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wake_time.tv_nsec %= 1000000000;
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mWaiting++;
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result = pthread_cond_timedwait( &mCond, &mMutex, &wake_time );
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mWaiting--;
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}
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pthread_mutex_unlock(&mMutex);
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if (result == 0)
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return CEvent::eWAIT_SIGNAL;
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else if (result == ETIMEDOUT)
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return CEvent::eWAIT_TIMEOUT;
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else
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return CEvent::eWAIT_ERROR;
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}
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}
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#endif // #if defined(_REENTRANT)
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