How do I use Boost Asio timers in C++?

Can you explain how to use timers in Boost Asio?

Sure! Boost Asio provides a way to create timers using the steady_timer class. You can set a timer to expire after a certain duration.

How do I set a timer to trigger after 5 seconds?

You can create a steady_timer object and use the expires_after method. For example: timer.expires_after(std::chrono::seconds(5));.

What happens when the timer expires?

When the timer expires, you can define a callback function that will be called. You can use async_wait to wait for the timer to expire and execute your callback.

Can you show me a complete example?

Certainly! Here's a simple example:

#include <boost/asio.hpp>
#include <iostream>
#include <chrono>

void timer_handler(const boost::system::error_code& /*e*/) {
    std::cout << "Timer expired!" << std::endl;
}

int main() {
    boost::asio::io_context io;
    boost::asio::steady_timer timer(io, std::chrono::seconds(5));
    timer.async_wait(timer_handler);
    io.run();
    return 0;
}