live555 任務調度處理函數使用

原創

2020-02-21 00:05

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live555 任務調度採用幾個函數進行設置

void setBackgroundHandling(int socketNum, int conditionSet　,BackgroundHandlerProc* handlerProc, void* clientData)

以RTSP 連接處理爲例

RTSPServer::RTSPClientConnection
::RTSPClientConnection(RTSPServer& ourServer, int clientSocket, struct sockaddr_in clientAddr)
  : fOurServer(ourServer), fIsActive(True),
    fClientInputSocket(clientSocket), fClientOutputSocket(clientSocket), fClientAddr(clientAddr),
    fRecursionCount(0), fOurSessionCookie(NULL) {
  // Add ourself to our 'client connections' table:
  fOurServer.fClientConnections->Add((char const*)this, this);
  
  // Arrange to handle incoming requests:
  resetRequestBuffer();
  envir().taskScheduler().setBackgroundHandling(fClientInputSocket, SOCKET_READABLE|SOCKET_EXCEPTION,
						(TaskScheduler::BackgroundHandlerProc*)&incomingRequestHandler, this);
}

析構函數中關閉socket 需要移除處理函數

void RTSPServer::RTSPClientConnection::closeSockets() {
  // Turn off background handling on our input socket (and output socket, if different); then close it (or them):
  if (fClientOutputSocket != fClientInputSocket) {
    envir().taskScheduler().disableBackgroundHandling(fClientOutputSocket);
    ::closeSocket(fClientOutputSocket);
  }
  
  envir().taskScheduler().disableBackgroundHandling(fClientInputSocket);
  ::closeSocket(fClientInputSocket);
  
  fClientInputSocket = fClientOutputSocket = -1;
}

添加延遲任務：

TaskToken scheduleDelayedTask(int64_t microseconds, TaskFunc* proc,void* clientData)

在我的RTSP客戶端中使用的示例:

void CloseClientFun(void *data)
{   
	RTSPClient* pClient=(RTSPClient*)data;
	shutdownStream(pClient,0);
}

int CStreamItem::Close()
{
	if (m_pRtspClient)
	{		
		m_pRtspClient->m_lpStreamCallBack=NULL;
		m_pRtspClient->m_pUserData=NULL;
	
		theApp.g_scheduler->scheduleDelayedTask(1, CloseClientFun, m_pRtspClient);			
		
		m_pRtspClient=NULL;
	}
	return 0;	
}