socket用select实现异步通讯

来源：互联网发布：复杂网络定义编辑：程序博客网时间：2024/06/05 19:44

HANDLE ComPort = (HANDLE)CompletionPort;
DWORD BytesTransferred;
//LPOVERLAPPED Overlapped;
LPPER_HANDLE_DATA PerHandleData;
LPPER_IO_OPERATION_DATA PerIoData;
DWORD SendBytes,RecvBytes;
DWORD Flags = 0;
BOOL bT;

while(TRUE)
{
  //等待完成端口上SOCKET的完成
  cout<<"["<<GetCurrentProcessId()<<":"<<GetCurrentThreadId()<<"]"<<":等待完成端口上SOCKET的完成"<<endl;
  bT = GetQueuedCompletionStatus(ComPort,
   &BytesTransferred,(LPDWORD)&PerHandleData,
   (LPOVERLAPPED *)&PerIoData,INFINITE);

  //检查是否有错误产生
  if(BytesTransferred == 0 &&
   (PerIoData->OperationType == RECV_POSTED ||
   PerIoData->OperationType == SEND_POSTED))
  {
   //关闭SOCKET
   cout<<"["<<GetCurrentProcessId()<<":"<<GetCurrentThreadId()<<"]"<<PerHandleData->sock<<"SOCKET关闭"<<endl;
   closesocket(PerHandleData->sock);
   free(PerHandleData);
   free(PerIoData);
   continue;
  }

//如果结束socket后做了其他事情,费时间,那么...要么优化其他事情,转移到其他地方去做.要么不适用IOCP.
//Sleep(1000);

  //为请求服务
  if(PerIoData->OperationType == RECV_POSTED)
  {
   //处理
   cout<<"["<<GetCurrentProcessId()<<":"<<GetCurrentThreadId()<<"]"<<"接收处理"<<endl;
   cout<<"["<<GetCurrentProcessId()<<":"<<GetCurrentThreadId()<<"]"<<PerHandleData->sock<<" SOCKET :"<<PerIoData->Buff<<endl;
   //回应客户端
   ZeroMemory(PerIoData->Buff,24);
   //#define _CRT_SECURE_NO_WARNINGS 1
   //strcpy(PerIoData->Buff,"OK");
   strcpy_s(PerIoData->Buff,"OK");
   Flags = 0;
   ZeroMemory((LPVOID)&(PerIoData->Overlapped),sizeof(OVERLAPPED));
   PerIoData->DataBuff.len = 2;
   PerIoData->DataBuff.buf = PerIoData->Buff;
   PerIoData->OperationType = SEND_POSTED;
   WSASend(PerHandleData->sock,&(PerIoData->DataBuff),
    1,&SendBytes,0,&(PerIoData->Overlapped),NULL);
  }
  else //if(PerIoData->OperationType == SEND_POSTED)
  {
   //发送时的处理
   cout<<"["<<GetCurrentProcessId()<<":"<<setfill('0')<<setw(4)<<GetCurrentThreadId()<<"]"<<"发送处理"<<endl;
   Flags = 0;
   ZeroMemory((LPVOID)&(PerIoData->Overlapped),sizeof(OVERLAPPED));
   ZeroMemory(PerIoData->Buff,24);
   PerIoData->DataBuff.len = 24;
   PerIoData->DataBuff.buf = PerIoData->Buff;
   PerIoData->OperationType = RECV_POSTED;
   WSARecv(PerHandleData->sock,&(PerIoData->DataBuff),
    1,&RecvBytes,&Flags,&(PerIoData->Overlapped),NULL);
  }
}

0 0