support_sigint_sigterm_sample.cxx

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

int main() try
{
  std::cout << "app start\n"; 
  
  auto run_continues = true;
  auto main_task = [&]
  {
    do
    {
      std::this_thread::sleep_for
      ( std::chrono::seconds(1) );
      std::cout << "tick " << std::flush;
    }
    while(run_continues);
  };

  auto t = std::thread( main_task );
  
  boost::asio::io_service aios;
  boost::asio::signal_set ss(aios, SIGINT, SIGTERM);
  ss.async_wait
  (
    [&]
    ( const boost::system::error_code & e
    , int n
    )
    {
      if(!e)
      {
        switch(n)
        {
        case SIGINT : std::cerr << "SIGINT"; break;
        case SIGTERM: std::cerr << "SIGTERM"; break;
        default     : std::cerr << "SIG(" << n << ")";
        }
      }else
        std::cerr << "error_code(" << e << ")";
    }
  );
  aios.run();
  run_continues = false;
  t.join();
  
  std::cout << "app end\n"; 
}
catch(const std::exception& e)
{
  std::cerr << "exception: " << e.what();
  return -1;
}
catch(...)
{
  std::cerr << "exception: (unkown exception parameter)";
  return -2;
}