template <typename SyncReadStream, typename MutableBufferSequence> void readWithTimeout(SyncReadStream& s, const MutableBufferSequence& buffers, const boost::asio::deadline_timer::duration_type& expiry_time) { boost::optional<boost::system::error_code> timer_result; boost::asio::deadline_timer ...
boost::bind(&read_callback, boost::ref(data_available), boost::ref(timeout), boost:...
asio包含errorcode参数的函数，不会抛出异常 可以尝试connect之后，判断错误码， boost::asio::error::...
int poll_read(socket_type s, state_type state, boost::system::error_code& ec) {if(s == invalid_socket) { ec = boost::asio::error::bad_descriptor;returnsocket_error_retval; } pollfd fds; fds.fd = s; fds.events = POLLIN; fds.revents =0; int timeout = (state & user_set_non...
epoll_wait 等候所关心的事件发生(或 timeout),仅仅返回一个链表拿到发生的事情,O(1) 的处理 参看这篇文章,关于为什么 epoll (在 scale up 的时候会)优于另两者写得非常的清楚,这也是 boost ASIO 现在默认在 Linux 里面使用的方式。当然主要的坏处是仅仅在 Linux 中可用。
"RS485CommunicationLayer::readUntil :: Port threw an error <message: %s>"
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io_service service; ip::tcp::socket sock1(service); ip::tcp::socket sock2(service); sock1.async_connect( ep, connect_handler); sock2.async_connect( ep, connect_handler); deadline_timer t(service, boost::posixtime::seconds(5)); t.async_wait(timeout_handler); for ( int i = 0;...
run_io_service.detach();//io_service.run();// QTimer timer;// QObject::connect(&timer, &QTimer::timeout, [&] {// qDebug() << "poll";// io_service.poll_one();// //io_service.poll();// });// timer.start(100);//return a.exec();std::this_thread::sleep_for(std::...
// Linux平台上使用epoll的简化示例 int epfd = epoll_create(1); epoll_ctl(epfd, EPOLL_CTL_ADD, fd, &ev); while (true) { epoll_wait(epfd, &events, maxevents, timeout); // 处理事件 } macOS平台 在macOS平台上,Qt利用了苹果的Core Foundation框架来实现事件循环和异步处理,尤其是利用了 CFRun...