carbthrd.cpp

linux下的一款播放器

    const BOOL bSkipParam1   = (pMatch->m_pParam1 == NULL);
    const BOOL bSkipParam2   = (pMatch->m_pParam2 == NULL);
    while((osResult = ::MPWaitOnQueue(m_mpQueueID, &param1, &param2, &param3, kDurationImmediate)) == noErr)
    {        
        // does it match?
        if( ( bSkipMessage || pMatch->m_ulMessage == (UINT32) param1 ) &&
            ( bSkipParam1  || pMatch->m_pParam1 == param2 ) &&
            ( bSkipParam2  || pMatch->m_pParam2 == param3 ) )
        {
            foundAMatch = TRUE;
            break;
        }
        
        // copy it into the temp queue
        ::MPNotifyQueue(tempQ, param1, param2, param3);
    }
    
    if( foundAMatch )
    {
	// copy the found message to the out variable
	pMsg->m_ulMessage = (UINT32)param1;
	pMsg->m_pParam1 = param2;
	pMsg->m_pParam2 = param3;
		
	// if we aren't supposed to remove it, re-post it
	if( !bRemoveMessage )
	{
	    ::MPNotifyQueue(tempQ, param1, param2, param3);
	}
		
	// now copy any remaining messages
        while((osResult = ::MPWaitOnQueue(m_mpQueueID, &param1, &param2, &param3, kDurationImmediate)) == noErr)
        {
            ::MPNotifyQueue(tempQ, param1, param2, param3);
        }
        
        retval = HXR_OK;
    }
    else
    {
        pMsg->m_ulMessage = 0;
        retval = HXR_FAIL;
    }
    
    // now that the original queue is empty, throw it away and keep the copy that we made
    ::MPDeleteQueue(m_mpQueueID);
    m_mpQueueID = tempQ;

    m_pQueueMutex->Unlock();

    return retval;
}

HX_RESULT
HXCarbonThread::DispatchMessage(HXThreadMessage* pMsg)
{
    HX_RESULT retval = HXR_NOTIMPL;
    HX_ASSERT(!"Unimplemented DispatchMessage!");
    return retval;
}



// HXCarbonEvent

HXCarbonEvent::HXCarbonEvent(const char* pEventName, BOOL bManualReset)
  : m_mpSemaphoreID(NULL)
  , m_IsManuallyReset( bManualReset )
{
    MPSemaphoreCount semaphoreMax = bManualReset ? INT_MAX : 1;
    OSStatus osStatus = ::MPCreateSemaphore(semaphoreMax, 0, &m_mpSemaphoreID);
    HX_ASSERT(osStatus == noErr);
}

HXCarbonEvent::~HXCarbonEvent()
{
    OSStatus osStatus = ::MPDeleteSemaphore(m_mpSemaphoreID);
    m_mpSemaphoreID = NULL;
    HX_ASSERT(osStatus == noErr);
}

HX_RESULT
HXCarbonEvent::SignalEvent(void)
{
    HX_RESULT retval = HXR_OK;
    OSStatus osStatus = ::MPSignalSemaphore(m_mpSemaphoreID);
    if (osStatus != noErr && osStatus != kMPInsufficientResourcesErr) retval = HXR_FAIL;
    
    return retval;
}

HX_RESULT
HXCarbonEvent::ResetEvent(void)
{
    HX_RESULT retval = HXR_OK;
    OSStatus osStatus;
    
    while(noErr == (osStatus = ::MPWaitOnSemaphore(m_mpSemaphoreID, kDurationImmediate)))
    {
    }
    
    return retval;
}

void*
HXCarbonEvent::GetEventHandle(void)
{
    return (void*)m_mpSemaphoreID;
}

HX_RESULT
HXCarbonEvent::Wait(UINT32 uTimeoutPeriod)
{
    HX_RESULT retval = HXR_OK;
    
    Duration timeout = ( uTimeoutPeriod == ALLFS ) ? kDurationForever : ( uTimeoutPeriod * kDurationMillisecond );
    
    OSStatus osStatus = ::MPWaitOnSemaphore(m_mpSemaphoreID, timeout);
    
    switch (osStatus)
    {
	case noErr:
	    if( m_IsManuallyReset )
	    {
	    	// needs to go back into the raised state until Reset is explicitly called
	    	::MPSignalSemaphore(m_mpSemaphoreID);
	    }
	    retval = HXR_OK;
	    break;
	
	case kMPTimeoutErr:
	    retval = HXR_WOULD_BLOCK; // winthrd.cpp returns this if the wait times out
	    break;
	
	default:
	    retval = HXR_FAIL;
	    break;
    }
    
    return retval;
}

// HXCarbonManualEvent

HXCarbonManualEvent::HXCarbonManualEvent(const char* pEventName)
 : m_pMutex(NULL)
 , m_bIsSignalled(FALSE)
 , m_InternalSemaphoreID(NULL)
{
    HXMutex::MakeMutex(m_pMutex);
    OSStatus osStatus = ::MPCreateSemaphore(1, 0, &m_InternalSemaphoreID);
}

HXCarbonManualEvent::~HXCarbonManualEvent()
{
    OSStatus osStatus = ::MPDeleteSemaphore(m_InternalSemaphoreID);
    m_InternalSemaphoreID = NULL;
    HX_DELETE(m_pMutex);
}

HX_RESULT
HXCarbonManualEvent::SignalEvent()
{
    m_pMutex->Lock();
    m_bIsSignalled = TRUE;
    ::MPSignalSemaphore(m_InternalSemaphoreID); // in case we're waiting.
    m_pMutex->Unlock();
    
    return HXR_OK;
}

HX_RESULT
HXCarbonManualEvent::ResetEvent()
{
    m_pMutex->Lock();
    m_bIsSignalled = FALSE;
    ::MPWaitOnSemaphore(m_InternalSemaphoreID, kDurationImmediate); // just clear it out...
    m_pMutex->Unlock();
    return HXR_OK;
}

HX_RESULT
HXCarbonManualEvent::Wait(UINT32 uTimeoutPeriod)
{
    BOOL bDone = FALSE;
    
    HX_RESULT retVal = HXR_OK;
    
    while (!bDone)
    {
	m_pMutex->Lock();
	BOOL bIsSignalled = m_bIsSignalled;
	m_pMutex->Unlock();
	if (bIsSignalled)
	{
	    bDone = TRUE;
	}
	else
	{
	    // xxxbobclark rely on MP semaphore
	    
	    Duration timeout = ( uTimeoutPeriod == ALLFS ) ? kDurationForever : ( uTimeoutPeriod * kDurationMillisecond );
	    
	    OSStatus osStatus = ::MPWaitOnSemaphore(m_InternalSemaphoreID, timeout);
	    bDone = TRUE;
	    if (osStatus == kMPTimeoutErr)
	    {
		retVal = HXR_WOULD_BLOCK;
	    }
	}
    }

    return retVal;
}

void*
HXCarbonManualEvent::GetEventHandle	(void)
{
    return (void*)this;
}


// HXCarbonMutex

HXCarbonMutex::HXCarbonMutex()
{
    MPCreateCriticalRegion(&mCriticalRegion);
}

HXCarbonMutex::~HXCarbonMutex()
{
    MPDeleteCriticalRegion(mCriticalRegion);
}

HX_RESULT
HXCarbonMutex::Lock(void)
{
    MPEnterCriticalRegion(mCriticalRegion, kDurationForever);
    return HXR_OK;
}

HX_RESULT
HXCarbonMutex::Unlock(void)
{
    MPExitCriticalRegion(mCriticalRegion);
    return HXR_OK;
}

HX_RESULT
HXCarbonMutex::Trylock(void)
{
    HX_RESULT retval = HXR_OK;
    OSStatus osStatus = MPEnterCriticalRegion(mCriticalRegion, kDurationImmediate);
    
    if (osStatus != noErr)
    {
    	retval = HXR_FAIL;
    } 
    return retval;
}


//HXCarbonSemaphore
HXCarbonSemaphore::HXCarbonSemaphore( UINT32 unInitialCount /*=0*/)
					:m_mpSemaphoreID(0)
{
   OSStatus osStatus = ::MPCreateSemaphore(INT_MAX, unInitialCount, &m_mpSemaphoreID);
   
   HX_ASSERT(osStatus == noErr);
}

HXCarbonSemaphore::~HXCarbonSemaphore()
{
	MPDeleteSemaphore(m_mpSemaphoreID);
}

HX_RESULT HXCarbonSemaphore::Post()
{
	HX_RESULT retval = HXR_OK;
	
	OSStatus osStatus = MPSignalSemaphore(m_mpSemaphoreID);
	
	if (osStatus != noErr)
	{
		retval = HXR_FAIL;
	}
	
	return retval; 
}

HX_RESULT HXCarbonSemaphore::Wait()
{
	HX_RESULT retval = HXR_OK;
	
	OSStatus osStatus = MPWaitOnSemaphore(m_mpSemaphoreID, kDurationForever);
	
	if (osStatus != noErr)
	{
		retval = HXR_FAIL;
	}
	
    	
	return retval;
}

HX_RESULT HXCarbonSemaphore::TryWait()
{
	HX_RESULT retval = HXR_OK;
	
	OSStatus osStatus = MPWaitOnSemaphore(m_mpSemaphoreID, kDurationImmediate);
	
	if (osStatus != noErr)
	{
		retval = HXR_FAIL;
	}
	
	return retval;
}
	
#if 0

// HXCarbonAsyncTimer

HXCarbonAsyncTimer::HXCarbonAsyncTimer(ULONG32 ulTimeOut, HXThread* pReceivingThread)
 : m_ulTimeout(ulTimeOut)
 , m_pReceivingThread(pReceivingThread)
 , m_CarbonTimerUPP(NULL)
 , m_CarbonTimerRef(NULL)
 , m_msg(NULL)
{
    m_msg = new HXThreadMessage(HXMSG_ASYNC_TIMER, (void*)m_ulTimeout, NULL, NULL);
    m_CarbonTimerUPP = ::NewEventLoopTimerUPP((EventLoopTimerProcPtr)MyCarbonTimer);
    ::InstallEventLoopTimer(GetCurrentEventLoop(), 0, kEventDurationMillisecond *
		m_ulTimeout, m_CarbonTimerUPP, this, &m_CarbonTimerRef);
}

HXCarbonAsyncTimer::~HXCarbonAsyncTimer()
{
    if (m_CarbonTimerRef)
    {
	::RemoveEventLoopTimer(m_CarbonTimerRef);
	m_CarbonTimerRef = NULL;
    }
    if (m_CarbonTimerUPP)
    {
	::DisposeEventLoopTimerUPP(m_CarbonTimerUPP);
	m_CarbonTimerUPP = NULL;
    }
    delete m_msg;
}

/* static */
UINT32
HXCarbonAsyncTimer::SetTimer(ULONG32 ulTimeOut, HXThread* pReceivingThread)
{
    volatile HXCarbonAsyncTimer* pAsyncTimer = new HXCarbonAsyncTimer(ulTimeOut, pReceivingThread);
    return (UINT32) pAsyncTimer;
}

/* static */
void
HXCarbonAsyncTimer::MyCarbonTimer(EventLoopTimerRef, HXCarbonAsyncTimer* pAsyncTimer)
{
    HX_ASSERT(pAsyncTimer);
    HX_ASSERT(pAsyncTimer->m_pReceivingThread);
    HXThreadMessage theMsg(HXMSG_ASYNC_TIMER, (void*)pAsyncTimer->m_ulTimeout, NULL, NULL);
    pAsyncTimer->m_pReceivingThread->PostMessage(&theMsg);
}

#endif

#endif