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

void handler1(const boost::system::error_code &ec) 
{ 
  std::cout << "5 s." << std::endl; 
} 

void handler2(const boost::system::error_code &ec) 
{ 
  std::cout << "10 s." << std::endl; 
} 

int main() 
{ 
  boost::asio::io_service io_service; 
  boost::asio::deadline_timer timer1(io_service, 
    boost::posix_time::seconds(5)); 
  timer1.async_wait(handler1); 
  boost::asio::deadline_timer timer2(io_service, 
    boost::posix_time::seconds(10)); 
  timer2.async_wait(handler2); 
  io_service.run(); 
}