C++ CMutex::Lock方法代码示例

void LListCtrl::SetHeaderControlText( DWORD dwPos, const CUString& strValue )
{
    myLockListCtrl.Lock();
    if ( m_hWnd )
    {
        CHeaderCtrl* pHeaderCtrl = GetHeaderCtrl();

        ASSERT( (int)dwPos < pHeaderCtrl->GetItemCount() );

        HDITEM hdi;

        memset( &hdi, 0, sizeof( HDITEM ) );

        // Get header item data
        pHeaderCtrl->GetItem( dwPos, &hdi );

        // modify item data
        CUStringConvert strCnv;
        hdi.pszText = strCnv.ToT( strValue );
        hdi.mask = HDI_TEXT;

        // Set item data
        pHeaderCtrl->SetItem( dwPos, &hdi );

    }
    myLockListCtrl.Unlock();
}

void CTxWndDrawClockMgr::CheckClock( UINT nClockIn )
{
	g_mutexDrawClock.Lock(1000);
	
	MAPCLOCLKDATA::iterator itb = m_mapClockData.begin();
	MAPCLOCLKDATA::iterator ite = m_mapClockData.end();

	HWND hInvalidWnd = FALSE;
	for (; itb != ite; itb++)
	{
		if (itb->second.nCurrentTick < nClockIn)
		{
			//send draw msg
			if (::IsWindow(itb->first))
			{
				::PostMessage(itb->first, MSG_TXDRAWCLOCK, itb->second.wparam, itb->second.lparam);
				itb->second.nCurrentTick = nClockIn + itb->second.nTickInternal;
			}
			else
			{
				//error;
				hInvalidWnd = itb->first;
			}
		}
	}

	g_mutexDrawClock.Unlock();

	if (hInvalidWnd != NULL)
	{
		ST_DRAWCLOCKDATA data;
		data.hwnd = hInvalidWnd;
		UnRegisterDrawClock(data);
	}
}

CNetRange *GetNetRange(list<CNetRange> &plNetRanges)
{	g_mScanner.Lock();
	int iHighestScore=0; CNetRange *pNetRange=NULL;
	for(list<CNetRange>::iterator in=plNetRanges.begin(); in!=plNetRanges.end(); in++)
	{	int iScore=brandom(0, (*in).iPriority);
		if(iScore > iHighestScore) { iHighestScore=iScore; pNetRange=&(*in); } }
	g_mScanner.Unlock(); return pNetRange; }

//////////////////////////////////////////////////////////////////////////
// 
//  Function Name:  ViewFinderCallBackFun 
//  Description:    The function which receives the picture from a camera 
//  Parameters:     cdVoid *pBuf
//                  cdUInt32 Size
//                  cdUInt32 Format
//                  cdContext Context
//  Returns:        cdError code
//  Summary:       
//  Author:         CannonSDK                           
///////////////////////////////////////////////////////////////////////////
cdUInt32 cdSTDCALL	CCameraConnect::ViewFinderCallBackFun(	cdVoid		*pBuf,
											 			cdUInt32	Size,
														cdUInt32	Format,
														cdContext	Context )
{
	cdError				err=cdOK;
	LPBYTE				bpPixel;
	PBITMAPFILEHEADER	pBmpFileheader;
	PBITMAPINFOHEADER	pBmpInfoheader;
	CCameraConnect			*CpThis;
	
	CpThis = (CCameraConnect*)Context;
	
	
	if( Format == FILEFORMAT_BMP )
	{
		pBmpFileheader = (PBITMAPFILEHEADER)pBuf;
		pBmpInfoheader = (PBITMAPINFOHEADER)((LPBYTE)pBuf + sizeof(BITMAPFILEHEADER));
		bpPixel = (LPBYTE)pBuf + pBmpFileheader->bfOffBits;
		
		// A picture is saved at a buffer. 
		g_CVFMutex.Lock();
		memcpy(CpThis->m_BackSurface.vpBits, bpPixel, pBmpInfoheader->biSizeImage );
		g_CVFMutex.Unlock();
		// A picture is displayed. 
		g_CpVFThread->ResumeThread();

	}
	
	return	err;

 }

//设置一个回调函数，当数据准备好后，将数据回馈过去
void ZTDataBase::setPreparedCallback(DataProparedFunc *callbackFunc){
    CMutex mutex;
    mutex.Lock();
    
    m_callbackfunc = callbackFunc;
    
    mutex.Unlock();
}

CString GetHost(CNetRange *pNetRange)
{	if(!pNetRange) return CString(""); CString sRetVal; g_mScanner.Lock(); switch(pNetRange->iNetMask) {
	case 0:		sRetVal.Format("%d.%d.%d.%d", brandom(0, 255),		brandom(0, 255),	brandom(0, 255),	brandom(0, 255)		); break;
	case 8:		sRetVal.Format("%d.%d.%d.%d", pNetRange->iPart1,	brandom(0, 255),	brandom(0, 255),	brandom(0, 255)		); break;
	case 16:	sRetVal.Format("%d.%d.%d.%d", pNetRange->iPart1,	pNetRange->iPart2,	brandom(0, 255),	brandom(0, 255)		); break;
	case 24:	sRetVal.Format("%d.%d.%d.%d", pNetRange->iPart1,	pNetRange->iPart2,	pNetRange->iPart3,	brandom(0, 255)		); break;
	default:
	case 32:	sRetVal.Format("%d.%d.%d.%d", pNetRange->iPart1,	pNetRange->iPart2,	pNetRange->iPart3,	pNetRange->iPart4	); break; }
	g_mScanner.Unlock(); return sRetVal; }

CCheckUSB::~CCheckUSB(){
	if(ifInit == 1){
		if(ifCheckIn == 1){
			//变为不是1之后就开始退出消息检测循环
			CMutex mutex;
			mutex.Lock();
			if(stateIn == 1) stateIn = 3;
			mutex.Unlock();
			//阻塞直到退出循环之后才可以执行释放动作
			while(stateIn != 0);
			//此时关闭之后句柄就已经无效了不需要再销毁
			CloseWindow(Son->h_CheckIn);
			if(IsWindow(Son->h_CheckIn) != 0) AfxMessageBox("未成功关闭");
			//成功关闭窗口之后就可以反注册类了
			BOOL nSucceed = UnregisterClass("USBIn",AfxGetInstanceHandle());
			if(nSucceed == 0) AfxMessageBox("反注册类失败");
		}
		
		if(ifCheckOut == 1){
			//变为不是1之后就开始退出消息检测循环
			CMutex mutex;
			mutex.Lock();
			//如果在循环内则让他跳出循环
			if(stateOut == 1) stateOut = 3;
			mutex.Unlock();
			//阻塞直到退出循环之后才可以执行释放动作
			while(stateOut != 0);
			//此时关闭之后句柄就已经无效了不需要再销毁
			CloseWindow(Son->h_CheckOut);
			if(IsWindow(Son->h_CheckOut) != 0) AfxMessageBox("未成功关闭");
			//成功关闭窗口之后就可以反注册类了
			BOOL nSucceed = UnregisterClass("USBOut",AfxGetInstanceHandle());
			if(nSucceed == 0) AfxMessageBox("反注册类失败");
		}
	}
	//在销毁之后就可以继续再产生CCheckUSB了，所以这里需要重置为0
	ifInit = 0;
}

void ISndStreamWinAmp::FlushFIFO( )
{
	// lock access to FIFO parameters
	g_mFifoAcces.Lock();

	g_nFifoFreeBuffers = WAPI_FIFO_NUM_BUFFERS;
	g_nFifoReadIdx = 0;
	g_nFifoWriteIdx = 0;

	g_eFifoNotFull.SetEvent( );
	g_eFifoNotEmpty.ResetEvent( );

	g_nFifoTotalBytes = 0;

	// unlock access to FIFO parameters
	g_mFifoAcces.Unlock();
}

void CFileUpLoad::UnInit()
{
	m_bStop = TRUE;
	m_bConnect = FALSE;
	g_bFileConnect = false;
	m_bUpLoad = FALSE;

	g_pLogger->information("CFileUpLoad UnInit==>WaitForStop().");
	WaitForStop();
	g_pLogger->information("CFileUpLoad UnInit==>WaitForStop() completed.");

	if (m_pITcpClient)
	{
		m_pITcpClient->ReleaseConnections();
		m_pITcpClient = NULL;
	}

	mutexObj.Lock();
	std::list<stUpLoadAns*>::iterator it1 = m_listFile.begin();
	for (; it1 != m_listFile.end(); )
	{
		stUpLoadAns* itUp = *it1;
		it1 = m_listFile.erase(it1);
		SAFE_RELEASE(itUp);
	}
	m_listFile.clear();
	mutexObj.Unlock();
	// 	m_VecAns.clear();
	std::vector<stUpLoadAns*>::iterator it = m_VecAns.begin();
	for (; it != m_VecAns.end(); it++)
	{
		if (*it)
		{
			delete (*it);
			(*it) = NULL;
		}
	}
	std::list<pstUpLoadAddr>::iterator itAddr = m_UpLoadAddrList.begin();
	for (; itAddr != m_UpLoadAddrList.end();)
	{
		pstUpLoadAddr pUpLoadAddr = *itAddr;
		itAddr = m_UpLoadAddrList.erase(itAddr);
		SAFE_RELEASE(pUpLoadAddr);
	}
}

BOOL CTxWndDrawClockMgr::UnRegisterDrawClock( ST_DRAWCLOCKDATA& data )
{
	g_mutexDrawClock.Lock(1000);
	m_mapClockData.erase(data.hwnd);
	if (m_mapClockData.size() == 0)
	{
		if (m_hThread != NULL)
		{
			TerminateThread(m_hThread, 0);
			CloseHandle(m_hThread);
			m_hThread = NULL;
		}
	}

	g_mutexDrawClock.Unlock();
	
	return TRUE;
}

BOOL CFileUpLoad::SendAnsFile(CString strFilePath, CString strFileName, void* pTask)
{
	stUpLoadAns* stAns	= new stUpLoadAns();
	stAns->strAnsName	= strFileName;
	stAns->strPath	= strFilePath;
	stAns->bUpload	= FALSE;
	stAns->pTask	= pTask;
#if 1
	mutexObj.Lock();
	m_listFile.push_back(stAns);
	mutexObj.Unlock();
#else
	m_VecAns.push_back(stAns);
#endif

	TRACE(_T("add ans file %s\n"), strFileName);
	SetEvent(m_hAddAnsEvent);
	return TRUE;
	
}

void CCondition::Wait(CMutex &mutex)
{
#if defined(COREARRAY_POSIX_THREAD)

	int v = pthread_cond_wait(&cond, &mutex.mutex);
	if (v != 0)
		throw ErrThread(ERR_PTHREAD, "pthread_cond_wait", v);

#elif defined(COREARRAY_PLATFORM_WINDOWS)
	// increase the number of waiters
	EnterCriticalSection(&cond.waiter_count_mutex);
	cond.waiter_count ++;
	LeaveCriticalSection(&cond.waiter_count_mutex);

	// release the mutex object
	mutex.Unlock();

	// wait for either event to become signaled
	DWORD rv = WaitForMultipleObjects(2, cond.events, FALSE, INFINITE);
	if (rv == WAIT_TIMEOUT)
		throw ErrThread("condition object wait time out.");
	else if (rv == WAIT_FAILED)
		throw ErrThread(LastSysErrMsg());

	// check if we are the last waiter
	EnterCriticalSection(&cond.waiter_count_mutex);
	cond.waiter_count --;
	bool IsLast = (rv == (WAIT_OBJECT_0 + 1)) && (cond.waiter_count == 0);
	LeaveCriticalSection(&cond.waiter_count_mutex);

	// reset the event if last waiter
	if (IsLast)
	{
		if (ResetEvent(cond.events[1]) == 0)
			throw ErrThread(LastSysErrMsg());
	}

	// Re-acquire the mutex
	mutex.Lock();
#endif
}

/*
 * Reads the received numberOfScans scans from the device. If not enough data is available (errorCode == 2) or the application buffer overruns (errorCode == 1), this method returns false.
 * float* destBuffer:	the array that returns the received data from the application data buffer. 
						Data is aligned as follows: element at position destBuffer[scanIndex * numChannels + channelIndex] is sample of channel channelIndex (zero-based) of the scan with zero-based scanIndex.
						channelIndex ranges from 0..numChannelsPerDevices where numChannelsPerDevice the total number of channels of the device including the trigger line.
 * int numberOfScans:	the number of scans to retrieve from the application buffer.
 */
bool ReadData(float* destBuffer, int numberOfScans, int *errorCode, string *errorMessage)
{
	int numChannels = NUMBER_OF_CHANNELS + (int) ENABLE_TRIGGER;
	int validPoints = numChannels * numberOfScans;

	//wait until requested amount of data is ready
	if (_buffer.GetSize() < validPoints)
	{
		*errorCode = 2;
		*errorMessage = "Not enough data available";
		return false;
	}

	//acquire lock on the application buffer for reading
	_bufferLock.Lock();

	__try
	{
		//if buffer run over report error and reset buffer
		if (_bufferOverrun)
		{
			_buffer.Reset();
			*errorCode = 1;
			*errorMessage = "Error on reading data from the application data buffer: buffer overrun.";
			_bufferOverrun = false;
			return false;
		}

		//copy the data from the application buffer into the destination buffer
		_buffer.Read(destBuffer, validPoints);
	}
	__finally
	{
		_bufferLock.Unlock();
	}

	*errorCode = 0;
	*errorMessage = "No error occured.";
	return true;
}

BOOL CTxWndDrawClockMgr::RegisterDrawClock( ST_DRAWCLOCKDATA& data )
{
	g_mutexDrawClock.Lock(1000);
	MAPCLOCLKDATA::iterator itf = m_mapClockData.find(data.hwnd);
	if (itf == m_mapClockData.end())
	{
		data.nCurrentTick = GetTickCount();
		m_mapClockData[data.hwnd] = data;
		if (m_mapClockData.size() ==1)
		{
			if (m_hThread != NULL)
			{
				ASSERT(FALSE);
				CloseHandle(m_hThread);
			}
			m_hThread = CreateThread(NULL, 0, ClockThreadProc, (void*)(&m_mapClockData), 0, NULL);
			ASSERT(m_hThread != NULL);
		}
	}
		
	g_mutexDrawClock.Unlock();
	return TRUE;
}

//////////////////////////////////////////////////////////////////////////
// 
//  Function Name:  ViewFinderProc 
//  Description:    The thread for displaying a picture 
//  Parameters:     LPVOID vpParam                
//  Returns:        some UINT value
//  Summary:       
//  Author:         CannonSDK
//                           
///////////////////////////////////////////////////////////////////////////
UINT WINAPI	CCameraConnect::ViewFinderProc( LPVOID	vpParam )
{
	CCameraConnect		*CpThis;
	BOOL			*fpEnd;
	//BOOL fEnd;  //Commented due to unreferenced variable
	HDC				hdcDest,hdcSrc;
	//CStatic *viewfinder;  //Commented due to unreferenced variable
	//DIBData backsurface;  Commented due to unfeferenced variable

	CpThis = (CCameraConnect*)vpParam;
	fpEnd = (BOOL*)(&CpThis->m_fVFEnd);
	
	while( *fpEnd )
	{
		/* It waits until it can use data. */
		g_CVFMutex.Lock();
		
		/* A picture is displayed. */
		hdcDest = ::GetDC( CpThis->m_CpViewFinder->GetSafeHwnd() );
		hdcSrc = ::CreateCompatibleDC( hdcDest );
		::SelectObject( hdcSrc, CpThis->m_BackSurface.hBmp );
		::BitBlt(	hdcDest,
					0,0,VIEWFINDER_WIDTH,VIEWFINDER_HEIGHT,
					hdcSrc,
					0,0,
					SRCCOPY );
		::DeleteDC( hdcSrc );
		::ReleaseDC( CpThis->m_CpViewFinder->GetSafeHwnd(), hdcDest );
		
		/* The ownership of data is released. */
		g_CVFMutex.Unlock();
		/* A thread is suspended. */
		g_CpVFThread->SuspendThread();
	}
	
	return	0;
}