so_5/blinking_led/main.cpp

/*
 * An example of using composite agent state, on_enter/on_exit handlers and
 * time_limit for states.
 */
#include <iostream>
 
#include <so_5/all.hpp>
 
using namespace std::chrono_literals;
 
class blinking_led final : public so_5::agent_t
{
  state_t off{ this }, blinking{ this },
    blink_on{ initial_substate_of{ blinking } },
    blink_off{ substate_of{ blinking } };
 
public :
  struct turn_on_off final : public so_5::signal_t {};
 
  blinking_led( context_t ctx ) : so_5::agent_t{ ctx }
  {
    this >>= off;
 
    off.just_switch_to< turn_on_off >( blinking );
 
    blinking.just_switch_to< turn_on_off >( off );
 
    blink_on
      .on_enter( []{ std::cout << "ON" << std::endl; } )
      .on_exit( []{ std::cout << "off" << std::endl; } )
      .time_limit( std::chrono::milliseconds{1250}, blink_off );
 
    blink_off
      .time_limit( std::chrono::milliseconds{750}, blink_on );
  }
};
 
int main()
{
  try
  {
    so_5::launch( []( so_5::environment_t & env ) {
      auto m = env.introduce_coop( []( so_5::coop_t & coop ) {
          return coop.make_agent< blinking_led >()->so_direct_mbox();
        } );
 
      std::cout << "Turn blinking on for 10s" << std::endl;
      so_5::send< blinking_led::turn_on_off >( m );
      std::this_thread::sleep_for( 10s );
 
      std::cout << "Turn blinking off for 5s" << std::endl;
      so_5::send< blinking_led::turn_on_off >( m );
      std::this_thread::sleep_for( 5s );
 
      std::cout << "Turn blinking on for 5s" << std::endl;
      so_5::send< blinking_led::turn_on_off >( m );
      std::this_thread::sleep_for( 5s );
 
      std::cout << "Stopping..." << std::endl;
      env.stop();
    } );
  }
  catch( const std::exception & ex )
  {
    std::cerr << "Error: " << ex.what() << std::endl;
  }
 
  return 0;
}