#include <iostream>

#include <boost/asio/io_service.hpp>
#include <boost/asio/steady_timer.hpp>
#include <boost/chrono.hpp>
#include <boost/thread.hpp>

boost::asio::io_service io_service;
boost::asio::steady_timer timer(io_service);

void arm_timer()
{
  std::cout << ".";
  std::cout.flush();
  timer.expires_from_now(boost::chrono::seconds(3));
  timer.async_wait(boost::bind(&arm_timer));
}

int main()
{
  // Add asynchronous work loop.
  arm_timer();

  boost::thread poll_thread(
    boost::bind(&boost::asio::io_service::poll, boost::ref(io_service)));

  // Give time for poll thread service reactor.
  boost::this_thread::sleep_for(boost::chrono::seconds(1));

  io_service.run();
}