Boost :: asio socket - 如何在“超时”中使read_some'throw'？

Question

So normaly we do something like this socket.read_some(boost::asio::buffer(buffer, buffer_size)); but how to make it throw an exeption in case of read has not started for some time longer than say 333 seconds?

Answer 1

You should consider using async_read_some instead of read_some , since it allows you to start a new background timer simultaneously with the read. Then, to create a new timer for each new socket you do:

boost::asio::io_service io_service;

time_t_timer timer(io_service);

timer.expires_from_now(333);
std::cout << "Starting asynchronous wait\n";
timer.async_wait(&handle_timeout);
io_service.run();

You will have two asyncronous calls waiting on background.

Whenever you receive some data on the timer you can reset the countdown using cancel and expires_from_now , and when the timer expires you can close the socket or take some other action.