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- // Copyright 2010 Christophe Henry
- // henry UNDERSCORE christophe AT hotmail DOT com
- // This is an extended version of the state machine available in the boost::mpl library
- // Distributed under the same license as the original.
- // Copyright for the original version:
- // Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
- // under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- #include <boost/msm/back/state_machine.hpp>
- #include <boost/msm/front/state_machine_def.hpp>
- #include <boost/msm/front/functor_row.hpp>
- namespace msm = boost::msm;
- namespace mpl = boost::mpl;
- using namespace msm::front;
- #include <iostream>
- #ifdef WIN32
- #include "windows.h"
- #else
- #include <sys/time.h>
- #endif
- namespace test_fsm // Concrete FSM implementation
- {
- // events
- struct play {};
- struct end_pause {};
- struct stop {};
- struct pause {};
- struct open_close {};
- struct cd_detected{};
- // Concrete FSM implementation
- struct player_ : public msm::front::state_machine_def<player_>
- {
- // no need for exception handling or message queue
- typedef int no_exception_thrown;
- typedef int no_message_queue;
- // The list of FSM states
- struct Empty : public msm::front::state<>
- {
- // optional entry/exit methods
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Empty" << std::endl;*/}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Empty" << std::endl;*/}
- };
- struct Open : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Open" << std::endl;*/}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Open" << std::endl;*/}
- };
- struct Stopped : public msm::front::state<>
- {
- // when stopped, the CD is loaded
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Stopped" << std::endl;*/}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Stopped" << std::endl;*/}
- };
- struct Playing : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Playing" << std::endl;*/}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Playing" << std::endl;*/}
- };
- // state not defining any entry or exit
- struct Paused : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Paused" << std::endl;*/}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Paused" << std::endl;*/}
- };
- // the initial state of the player SM. Must be defined
- typedef Empty initial_state;
- // transition actions
- struct start_playback
- {
- template <class FSM,class EVT,class SourceState,class TargetState>
- void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
- {
- }
- };
- struct open_drawer
- {
- template <class FSM,class EVT,class SourceState,class TargetState>
- void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
- {
- }
- };
- struct close_drawer
- {
- template <class FSM,class EVT,class SourceState,class TargetState>
- void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
- {
- }
- };
- struct store_cd_info
- {
- template <class FSM,class EVT,class SourceState,class TargetState>
- void operator()(EVT const&, FSM& fsm ,SourceState& ,TargetState& )
- {
- }
- };
- struct stop_playback
- {
- template <class FSM,class EVT,class SourceState,class TargetState>
- void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
- {
- }
- };
- struct pause_playback
- {
- template <class FSM,class EVT,class SourceState,class TargetState>
- void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
- {
- }
- };
- struct resume_playback
- {
- template <class FSM,class EVT,class SourceState,class TargetState>
- void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
- {
- }
- };
- struct stop_and_open
- {
- template <class FSM,class EVT,class SourceState,class TargetState>
- void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
- {
- }
- };
- struct stopped_again
- {
- template <class FSM,class EVT,class SourceState,class TargetState>
- void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
- {
- }
- };
- // guard conditions
- // Transition table for player
- struct transition_table : mpl::vector<
- // Start Event Next Action Guard
- // +---------+-------------+---------+---------------------+----------------------+
- Row < Stopped , play , Playing , start_playback >,
- Row < Stopped , open_close , Open , open_drawer >,
- Row < Stopped , stop , Stopped , stopped_again >,
- // +---------+-------------+---------+---------------------+----------------------+
- Row < Open , open_close , Empty , close_drawer >,
- // +---------+-------------+---------+---------------------+----------------------+
- Row < Empty , open_close , Open , open_drawer >,
- Row < Empty , cd_detected , Stopped , store_cd_info >,
- // +---------+-------------+---------+---------------------+----------------------+
- Row < Playing , stop , Stopped , stop_playback >,
- Row < Playing , pause , Paused , pause_playback >,
- Row < Playing , open_close , Open , stop_and_open >,
- // +---------+-------------+---------+---------------------+----------------------+
- Row < Paused , end_pause , Playing , resume_playback >,
- Row < Paused , stop , Stopped , stop_playback >,
- Row < Paused , open_close , Open , stop_and_open >
- // +---------+-------------+---------+---------------------+----------------------+
- > {};
- // Replaces the default no-transition response.
- template <class FSM,class Event>
- void no_transition(Event const& e, FSM&,int state)
- {
- std::cout << "no transition from state " << state
- << " on event " << typeid(e).name() << std::endl;
- }
- };
- typedef msm::back::state_machine<player_> player;
- //
- // Testing utilities.
- //
- static char const* const state_names[] = { "Stopped", "Open", "Empty", "Playing", "Paused" };
- void pstate(player const& p)
- {
- std::cout << " -> " << state_names[p.current_state()[0]] << std::endl;
- }
- }
- #ifndef WIN32
- long mtime(struct timeval& tv1,struct timeval& tv2)
- {
- return (tv2.tv_sec-tv1.tv_sec) *1000000 + ((tv2.tv_usec-tv1.tv_usec));
- }
- #endif
- int main()
- {
- // for timing
- #ifdef WIN32
- LARGE_INTEGER res;
- ::QueryPerformanceFrequency(&res);
- LARGE_INTEGER li,li2;
- #else
- struct timeval tv1,tv2;
- gettimeofday(&tv1,NULL);
- #endif
- test_fsm::player p2;
- p2.start();
- // for timing
- #ifdef WIN32
- ::QueryPerformanceCounter(&li);
- #else
- gettimeofday(&tv1,NULL);
- #endif
- for (int i=0;i<100;++i)
- {
- p2.process_event(test_fsm::open_close());
- p2.process_event(test_fsm::open_close());
- p2.process_event(test_fsm::cd_detected());
- p2.process_event(test_fsm::play());
- p2.process_event(test_fsm::pause());
- // go back to Playing
- p2.process_event(test_fsm::end_pause());
- p2.process_event(test_fsm::pause());
- p2.process_event(test_fsm::stop());
- // event leading to the same state
- p2.process_event(test_fsm::stop());
- p2.process_event(test_fsm::open_close());
- p2.process_event(test_fsm::open_close());
- }
- #ifdef WIN32
- ::QueryPerformanceCounter(&li2);
- #else
- gettimeofday(&tv2,NULL);
- #endif
- #ifdef WIN32
- std::cout << "msm took in s:" << (double)(li2.QuadPart-li.QuadPart)/res.QuadPart <<"\n" <<std::endl;
- #else
- std::cout << "msm took in us:" << mtime(tv1,tv2) <<"\n" <<std::endl;
- #endif
- return 0;
- }
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