我的程序要求我继续写作,同时还需要能够接收传入的数据。
这就是我尝试过的。我试图将async_receive放在不断接收数据的单独线程中。此外,我添加无限循环以继续发送数据。但是,我无法收到任何东西。
class UDPAsyncServer {
public:
UDPAsyncServer(asio::io_service& service,
unsigned short port)
: socket(service,
asio::ip::udp::endpoint(asio::ip::udp::v4(), port))
{
boost::thread receiveThread(boost::bind(&UDPAsyncServer::waitForReceive, this));
receiveThread.join();
while(1) {
sendingData();
}
}
void waitForReceive() {
socket.async_receive_from(asio::buffer(buffer, MAXBUF),
remote_peer,
[this] (const sys::error_code& ec,
size_t sz) {
const char *msg = "hello from server";
std::cout << "Received: [" << buffer << "] "
<< remote_peer << '\n';
waitForReceive();
socket.async_send_to(
asio::buffer(msg, strlen(msg)),
remote_peer,
[this](const sys::error_code& ec,
size_t sz) {});
});
}
void sendingData() {
std::cout << "Sending" << "\n";
//In this code, I will check the data need to be send,
//If exists, call async_send
boost::this_thread::sleep(boost::posix_time::seconds(2));
}
private:
asio::ip::udp::socket socket;
asio::ip::udp::endpoint remote_peer;
char buffer[MAXBUF];
};
如果我注释掉while (1) { sendingData(); };
接收功能正常工作。
提前致谢。
答案 0 :(得分:0)
你的UDPAsyncServer包含一个无限循环(while(1))所以它永远不会返回。所以没有其他事情发生,你的程序挂起了。注释循环可以避免挂起。