recvmsg is receiving into a buffer (streambuf) that was freed after throwing the exception in TCPClient::sendMessage (line 105, end of scope). You forgot to cancel the asynchronous operation (async_read_until) started in line 97. Fix it: else { socket->cancel(); // ADDED std::cout << “socket points to ” << std::addressof(*socket) << std::endl; throw std::runtime_error(“timeout”); } Or even, … Read more
Asio has added the concept of associated executors and default executors. The associated executors is not really new, because the handler_invoke protocol already allowed for handler-type specific semantics. However, since the formulation of the executor concept it became more generalized. Now you can post any handler, and it will execute on the associated executor, the … Read more
The Boost.Asio documentation really does a fantastic job explaining the two concepts. As Ralf mentioned, Chris also has a great blog describing asynchronous concepts. The parking meter example explaining how timeouts work is particularly interesting, as is the bind illustrated example. First, consider a synchronous connect operation: The control flow is fairly straightforward here, your … Read more
I solved the problem. I had built 32-bit libraries when I had intended to build 64-bit libraries. I fixed up my build statement, and built 64-bit libraries, and now it works. Here is my bjam command line: C:\Program Files (x86)\boost\boost_1_38>bjam –build-dir=c:\boost –build-type=complete –toolset=msvc-9.0 address-model=64 architecture=x86 –with-system
A very simple, but fully functional example: #include <iostream> #include <boost/asio.hpp> boost::asio::io_service io_service; boost::posix_time::seconds interval(1); // 1 second boost::asio::deadline_timer timer(io_service, interval); void tick(const boost::system::error_code& /*e*/) { std::cout << “tick” << std::endl; // Reschedule the timer for 1 second in the future: timer.expires_at(timer.expires_at() + interval); // Posts the timer event timer.async_wait(tick); } int main(void) { // … Read more
To securely disconnect, perform a shutdown operation and then close the underlying transport once shutdown has complete. Hence, the method you are currently using will perform a secure disconnect: boost::system::error_code ec; ssl_socket.cancel(ec); ssl_socket.async_shutdown([](…) { ssl_socket.close(); }; Be aware that the current async_shutdown operation will be considered complete when either: A close_notify has been received by … Read more
Got reply from boost community Yes. These platforms are not officially supported because no one has volunteered to run regression tests regularly for them. It is not possible for a Boost developer to test on all platforms. So developers depend on the test results of regression tests run by volunteers. For example, see http://beta.boost.org/development/tests/trunk/developer/summary.html If … Read more
boost::asio is not as thread-friendly as you would hope – there is a big lock around the epoll code in boost/asio/detail/epoll_reactor.hpp which means that only one thread can call into the kernel’s epoll syscall at a time. And for very small requests this makes all the difference (meaning you will only see roughly single-threaded performance). … Read more
Well. That’s really quite simple; You’re rejecting the tasks posted! template< typename Task > void run_task(task task){ boost::unique_lock<boost::mutex> lock( mutex_ ); if(0 < available_) { –available_; io_service_.post(boost::bind(&tpool::wrap_task, this, boost::function< void() > ( task ))); } } Note that the lock “waits” until the mutex is not owned by a thread. This might already be the … Read more
In short, there are two options: Change code to be asynchronous (acceptor::async_accept() and async_read), run within the event loop via io_service::run(), and cancel via io_service::stop(). Force blocking calls to interrupt with lower level mechanics, such as signals. I would recommend the first option, as it is more likely to be the portable and easier to … Read more