WinSock编程,WSAAsyncSelect模式,返回WSAEWOULDBLOCK错误
代码片段如下
用了WSAAsyncSelect模式,设置接与FD_READ和FD_CLOSE通知,在FD_READ消息中发送数据出错.
case FD_READ:
int len;
ioctlsocket( wParam, FIONREAD, &len )
char* buffer = new char[len];
recv( wParam, buffer, len, 0 );
//处理接收的数据
...........
//发送数扰
MessageHeader* hdr = buffer;
hdr->Message = PLAYERID;
hdr->Size = sizeof( UINT );
memcpy( hdr->Data, &id , sizeof( id ) );
send( wParam, buffer, len, 0 );//这时发生WSAEWOULDBLOCK错误。
大概是什么原因,高手指点一下。
感觉这时并没有数据等待发送