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Diffstat (limited to 'libs/msm/doc/HTML/examples/MsmComposite.cpp')
| -rw-r--r-- | libs/msm/doc/HTML/examples/MsmComposite.cpp | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/libs/msm/doc/HTML/examples/MsmComposite.cpp b/libs/msm/doc/HTML/examples/MsmComposite.cpp new file mode 100644 index 0000000000..556aad42b3 --- /dev/null +++ b/libs/msm/doc/HTML/examples/MsmComposite.cpp @@ -0,0 +1,243 @@ +// 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> + +namespace msm = boost::msm; +namespace mpl = boost::mpl; + +#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{}; + struct NextSong {}; + struct PreviousSong {}; + + + // 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_machine_def<Playing_> + { + // no need for exception handling or message queue + typedef int no_exception_thrown; + typedef int no_message_queue; + + // The list of FSM states + struct Song1 : public msm::front::state<> {}; + struct Song2 : public msm::front::state<> {}; + struct Song3 : public msm::front::state<> {}; + // the initial state. Must be defined + typedef Song1 initial_state; + // transition actions + void start_next_song(NextSong const&) { /*std::cout << "Playing::start_next_song\n";*/ } + void start_prev_song(PreviousSong const&) { /*std::cout << "Playing::start_prev_song\n"; */} + // guard conditions + + typedef Playing_ pl; // makes transition table cleaner + // Transition table for Playing + struct transition_table : mpl::vector4< + // Start Event Next Action Guard + // +---------+-------------+---------+---------------------+----------------------+ + a_row < Song1 , NextSong , Song2 , &pl::start_next_song >, + a_row < Song2 , PreviousSong, Song1 , &pl::start_prev_song >, + a_row < Song2 , NextSong , Song3 , &pl::start_next_song >, + a_row < Song3 , PreviousSong, Song2 , &pl::start_prev_song > + // +---------+-------------+---------+---------------------+----------------------+ + > {}; + // 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<Playing_> Playing; + + // 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 + void start_playback(play const&) { } + void open_drawer(open_close const&) { } + void close_drawer(open_close const&) { } + void store_cd_info(cd_detected const& cd) { } + void stop_playback(stop const&) { } + void pause_playback(pause const&) { } + void resume_playback(end_pause const&) { } + void stop_and_open(open_close const&) { } + void stopped_again(stop const&){} + // guard conditions + + typedef player_ p; // makes transition table cleaner + + // Transition table for player + struct transition_table : mpl::vector< + // Start Event Next Action Guard + // +---------+-------------+---------+---------------------+----------------------+ + a_row < Stopped , play , Playing , &p::start_playback >, + a_row < Stopped , open_close , Open , &p::open_drawer >, + a_row < Stopped , stop , Stopped , &p::stopped_again >, + // +---------+-------------+---------+---------------------+----------------------+ + a_row < Open , open_close , Empty , &p::close_drawer >, + // +---------+-------------+---------+---------------------+----------------------+ + a_row < Empty , open_close , Open , &p::open_drawer >, + a_row < Empty , cd_detected , Stopped , &p::store_cd_info >, + // +---------+-------------+---------+---------------------+----------------------+ + a_row < Playing , stop , Stopped , &p::stop_playback >, + a_row < Playing , pause , Paused , &p::pause_playback >, + a_row < Playing , open_close , Open , &p::stop_and_open >, + // +---------+-------------+---------+---------------------+----------------------+ + a_row < Paused , end_pause , Playing , &p::resume_playback >, + a_row < Paused , stop , Stopped , &p::stop_playback >, + a_row < Paused , open_close , Open , &p::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()); + for (int j=0;j<100;++j) + { + p2.process_event(test_fsm::NextSong()); + p2.process_event(test_fsm::NextSong()); + p2.process_event(test_fsm::PreviousSong()); + p2.process_event(test_fsm::PreviousSong()); + } + + 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; +} + |