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谁能解释一这下缓冲区的程序? //缓冲区可写性测试 if (FD_ISSET(sockinfo->socket, &fdwrite)) { sockok--; //继续发送剩余部分 sockinfo->wsaBuf.buf = sockinfo->buf + sockinfo->bytesend; sockinfo->wsaBuf.len = sockinfo->bytesrecv - sockinfo->bytesend; if (WSASend(sockinfo->socket, &(sockinfo->wsaBuf), 1, &datasend, 0, NULL, NULL) == SOCKET_ERROR) { if (WSAGetLastError() != WSAEWOULDBLOCK) { printf("Send failed with error\n"); FreeSocketInfo(index); } continue; } else { //增加已发送数据计数 sockinfo->bytesend += datasend; //二者相等时说明接收数据已发送完毕 if (sockinfo->bytesend == sockinfo->bytesrecv) { sockinfo->bytesend = 0; sockinfo->bytesrecv = 0; ZeroMemory(sockinfo->wsaBuf.buf,BUFFERSIZE); } |
