Winsocket中的completionport编程问题

Question

DWORD WINAPI CompletionPortWorker(LPVOID lpvParam)
{
    HANDLE                  hCompletionPort = (HANDLE)lpvParam;
    LPPER_HANDLE_DATA       lpPerHandleData = NULL;
    LPPER_IO_HANDLE_DATA    lpPerIOHandleData = NULL;
    DWORD                   dwBytesTransferred ,dwFlags ,dwRecvs ,dwSends;
 
 
    //WaitForSingleObject(hEvent ,INFINITE);
    printf("工作者线程开始运行\n");
    while(TRUE)
    {
        GetQueuedCompletionStatus(hCompletionPort ,
                               &dwBytesTransferred ,
                               (LPDWORD)lpPerHandleData ,
                               (LPOVERLAPPED *)&lpPerIOHandleData ,INFINITE);
 
        if((dwBytesTransferred == 0 &&
            (lpPerIOHandleData->dwFlagsOp == RECV_POSTED ||
            lpPerIOHandleData->dwFlagsOp == SEND_POSTED)) ||
            lpPerHandleData == NULL)
        {
            printf("Error : In CompletionFunction : %d\n" ,WSAGetLastError());
            closesocket(lpPerHandleData->sAccept);
            GlobalFree(lpPerHandleData);
            GlobalFree(lpPerIOHandleData);
            return 0;
        }
        if(lpPerIOHandleData->dwFlagsOp == RECV_POSTED)
        {
            printf("收到数据正在处理\n");
        }
        else if(lpPerIOHandleData->dwFlagsOp == SEND_POSTED)
        {
            printf("正在发送数据\n");
        }
        else
        {
            printf("客户机断开连接\n");
        }
 
        printf("初始化数据\n");
        dwFlags = 0;
 
        ZeroMemory(&lpPerIOHandleData->olData ,sizeof(OVERLAPPED));
        lpPerIOHandleData->wsaData.len  = 2048;
        lpPerIOHandleData->wsaData.buf  = lpPerIOHandleData->szBuffer;
        lpPerIOHandleData->dwFlagsOp    = RECV_POSTED;
 
        printf("接收数据\n");
        WSARecv(lpPerHandleData->sAccept ,
                &lpPerIOHandleData->wsaData ,1 ,
                &dwRecvs ,&dwFlags ,
                &lpPerIOHandleData->olData ,NULL);
 
    }
}红色那段代码啥意思？无论完成端口是是接收还是发送，都投递一个发送？

Answer 1

这只是测试代码；
功能在以上基础代码正常后再进行完善；
但我现在的问题是，启动服务程序后，程序就会挂掉；
单步跟踪：指示在GetQueuedCompletionStatus函数位置出错；如果有多个客户程序连入的时候，程序正常；
如果启动服务程序，而没有连入客户端，就挂

Answer 2

更改代码为：if(lpPerIOHandleData->dwFlagsOp == RECV_POSTED)
        {
            dwFlags = 0;
            ZeroMemory(&lpPerIOHandleData->olData ,sizeof(OVERLAPPED));
            lpPerIOHandleData->wsaData.len  = 2048;
            lpPerIOHandleData->wsaData.buf  = lpPerIOHandleData->szBuffer;
            lpPerIOHandleData->dwFlagsOp    = RECV_POSTED;            printf("接收数据\n");
            WSASend(lpPerHandleData->sAccept ,
                &lpPerIOHandleData->wsaData ,1 ,
                &dwRecvs ,dwFlags ,
                &lpPerIOHandleData->olData ,NULL);            printf("收到数据正在处理\n");
        }
        else if(lpPerIOHandleData->dwFlagsOp == SEND_POSTED)
        {
            dwFlags = 0;
            ZeroMemory(&lpPerIOHandleData->olData ,sizeof(OVERLAPPED));
            lpPerIOHandleData->wsaData.len  = 2048;
            lpPerIOHandleData->wsaData.buf  = lpPerIOHandleData->szBuffer;
            lpPerIOHandleData->dwFlagsOp    = RECV_POSTED;            printf("接收数据\n");
            WSARecv(lpPerHandleData->sAccept ,
                    &lpPerIOHandleData->wsaData ,1 ,
                    &dwRecvs ,&dwFlags ,
                    &lpPerIOHandleData->olData ,NULL);            printf("正在发送数据\n");
        }
        else
        {
            printf("客户机断开连接\n");
        }
程序依然会异常终止

Answer 3

求指教呀。。
到底是线程通信问题？
还是完成端口的问题？
哦god们

Answer 4

lz去研究一下http://bbs.csdn.net/topics/390978185这个吧，看起来还很不错，应该对你很有帮助