命名管道连接一次就没信号了是怎么回事呀???

kxzerg 2012-04-10 01:41:35

话说做了一个服务器端和一个客户端,服务器端线程和客户端如下:
连接没有问题,问题是读取一次之后服务器端就会卡在WaitForSingleObject那里不动了,一定要重新断开再连接管道才会有信号,
看了下MSDN上面的例程也是重连的...
我的问题是能不能设置EVENT什么的不要再次连接呢??各位大侠帮忙看下...我快死了...



// 管道线程

UINT CVCPipeServer::PipeServerThread(LPVOID Ptr)

{

	CVCPipeServer* psvr = (CVCPipeServer*)Ptr;

	if(!psvr)

	{

		AfxMessageBox(L"获取管道指针失败！");

		return -1;

	}

	HANDLE SvrHandle = psvr->m_SvrHandle;

	while(psvr->m_ThreadState)

	{

		if(WAIT_FAILED==WaitForSingleObject(psvr->m_hEvent,INFINITE))

		{

			TRACE0("等待对象失败！");

			TRACE1("====CREATE PIPE ERROR:%d\n",GetLastError());

			CloseHandle(psvr->m_hEvent);

			CloseHandle(SvrHandle);

			SvrHandle=NULL;

			return -1;

		}

		//读取数据

		char* buf = psvr->ReadPipe();

		

		if(!buf)

			continue;

		//CString str(buf);//读取

		if(psvr->m_pFrame)

			::SendMessageA(psvr->m_pFrame->GetSafeHwnd(),ID_MESSAGE_FORM_CLIENT,(WPARAM)buf,0);

		psvr->DisconnectAndReconnect();//一定要这个才行么?

		//SetEvent(psvr->m_hEvent);

		//SetEvent(SvrHandle);

	}





	return 0;

}

客户端是这样滴





CPipeClient::CPipeClient(void)

{

	m_SvrHandle=NULL;

	LPTSTR lpszPipename = TEXT("\\\\.\\pipe\\mynamedpipe"); 

	if(!WaitNamedPipe(lpszPipename,2000))

	{

		//CString err;

		//err.Format(_T("WaitNamedPipe失败 错误号:%d"),GetLastError());

		TRACE1("WaitNamedPipe失败 错误号:%d",GetLastError());

		//AfxMessageBox(err);

		return;

	}

	m_SvrHandle=CreateFile(lpszPipename,GENERIC_READ | GENERIC_WRITE,

		0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);

	DWORD dwMode = PIPE_TYPE_MESSAGE |      // message-type pipe 

         PIPE_READMODE_MESSAGE |  // message-read mode 

         PIPE_WAIT;

	if (INVALID_HANDLE_VALUE==m_SvrHandle) 

	{

		CString err;

		err.Format(_T("不能打开命名管道实例 错误号:%d"),GetLastError());

		AfxMessageBox(err);

		m_SvrHandle=NULL;

		return;

	}



      // Exit if an error other than ERROR_PIPE_BUSY occurs. 

 /*

	BOOL fSuccess = SetNamedPipeHandleState( 

		m_SvrHandle,    // pipe handle 

		&dwMode,  // new pipe mode 

		NULL,     // don't set maximum bytes 

		NULL);    // don't set maximum time 

	if (!fSuccess) 

	{

		CString err;

		err.Format(_T("SetNamedPipeHandleState failed 错误号:%d"),GetLastError());

		AfxMessageBox(err);

		m_SvrHandle=NULL;

		return;

	}*/



}





CPipeClient::~CPipeClient(void)

{

	

	if(m_SvrHandle)

		CloseHandle(m_SvrHandle);

}









// 读取管道内容

char* CPipeClient::ReadPipe(void)

{

	DWORD dwRead;

	if(m_SvrHandle==NULL)

		return NULL;

	memset(m_buf,0,1024);

	if(!ReadFile(m_SvrHandle,m_buf,1024,&dwRead,NULL))

		return NULL;

	return m_buf;

}





// 写入管道

int CPipeClient::WritePipe(LPCTSTR param)

{

	if(m_SvrHandle==NULL)

		return -1;

	memset(m_buf,0,1024);

	wcstombs(m_buf, param, 1024 );

	OVERLAPPED ovlap;

	ZeroMemory(&ovlap,sizeof(OVERLAPPED));

	DWORD dwWrite;

	if(!WriteFile(m_SvrHandle,m_buf,strlen(m_buf)+1,&dwWrite,&ovlap))

	{

		CString err;

		err.Format(_T("写入数据失败 错误号:%d"),GetLastError());

		AfxMessageBox(err);

		return -1;

	}

	return 0;

}