asio_post.cpp

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

int main(int argc, char const *argv[])
{
    boost::asio::io_service service;
    boost::asio::io_service::work work(service);
    std::thread thread([&service](){ service.run(); });

    int runs = 0;
    for (int i = 0; i < 10000; ++i) {
        service.post([&runs](){
            runs++;
        });
    }
    
    // the output here is always < 9999 and is non-deterministic
    std::cout << runs << std::endl;

    service.stop();
    thread.join();

    return 0;
}