小编cnd*_*cnd的帖子

我有以下功能设置,每2分钟从服务器接收数据.我第一次调用函数它似乎工作,但然后它冻结在recv永远不会返回的调用.我是否需要在每次调用时分配缓冲区,即使服务器没有任何内容可以发送？

#define RCVBUFSIZE 32

void Receive()
{   
    UINT totalBytesRcvd = 0, bytesRcvd = 0;
    char buffer[RCVBUFSIZE];     /* Buffer for string */

    /* Receive up to the buffer size (minus 1 to leave space for 
    a null terminator) bytes from the sender */

    bytesRcvd = recv(sockClient, buffer, RCVBUFSIZE - 1, 0);

    if (bytesRcvd)
    {
        buffer[bytesRcvd] = '\0';
        MessageBox(0, buffer, 0, 0); //some way to display the received buffer
    }
    else if (bytesRcvd == SOCKET_ERROR)
    {
        return;
    }
}