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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 <iostream>
- // back-end
- #include <boost/msm/back/state_machine.hpp>
- //front-end
- #include <boost/msm/front/state_machine_def.hpp>
- #include <boost/msm/front/functor_row.hpp>
- #include <boost/test/unit_test.hpp>
- namespace msm = boost::msm;
- namespace mpl = boost::mpl;
- using namespace boost::msm::front;
- namespace
- {
- // events
- struct event1 {};
- struct event2 {};
- struct event3 {};
- struct eventd {};
- // front-end: define the FSM structure
- struct player_ : public msm::front::state_machine_def<player_>
- {
- // The list of FSM states
- struct State11 : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {++entry_counter;}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {++exit_counter;}
- int entry_counter;
- int exit_counter;
- };
- struct State12 : public msm::front::state<>
- {
- typedef mpl::vector<eventd> deferred_events;
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {++entry_counter;}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {++exit_counter;}
- int entry_counter;
- int exit_counter;
- };
- struct State13 : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {++entry_counter;}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {++exit_counter;}
- int entry_counter;
- int exit_counter;
- };
- struct State21 : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {++entry_counter;}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {++exit_counter;}
- int entry_counter;
- int exit_counter;
- };
- struct State22 : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {++entry_counter;}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {++exit_counter;}
- int entry_counter;
- int exit_counter;
- };
- // the initial state of the player SM. Must be defined
- typedef mpl::vector<State11,State21> initial_state;
- // Transition table for player
- struct transition_table : mpl::vector<
- // Start Event Next Action Guard
- // +---------+-------------+---------+---------------------+----------------------+
- Row < State11 , event1 , State12 >,
- Row < State12 , event2 , State13 >,
- Row < State21 , event3 , State22 >,
- Row < State22 , eventd , State21 >
- // +---------+-------------+---------+---------------------+----------------------+
- > {};
- // Replaces the default no-transition response.
- template <class FSM,class Event>
- void no_transition(Event const& , FSM&,int )
- {
- BOOST_FAIL("no_transition called!");
- }
- // init counters
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& fsm)
- {
- fsm.template get_state<player_::State11&>().entry_counter=0;
- fsm.template get_state<player_::State11&>().exit_counter=0;
- fsm.template get_state<player_::State12&>().entry_counter=0;
- fsm.template get_state<player_::State12&>().exit_counter=0;
- fsm.template get_state<player_::State13&>().entry_counter=0;
- fsm.template get_state<player_::State13&>().exit_counter=0;
- fsm.template get_state<player_::State21&>().entry_counter=0;
- fsm.template get_state<player_::State22&>().exit_counter=0;
- }
- };
- // Pick a back-end
- typedef msm::back::state_machine<player_> player;
- BOOST_AUTO_TEST_CASE( TestDeferIn2Regions )
- {
- player p;
- // needed to start the highest-level SM. This will call on_entry and mark the start of the SM
- p.start();
- p.process_event(event1());
- BOOST_CHECK_MESSAGE(p.current_state()[0] == 1,"State12 should be active");
- BOOST_CHECK_MESSAGE(p.current_state()[1] == 2,"State21 should be active");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State11&>().exit_counter == 1,"State11 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State11&>().entry_counter == 1,"State11 entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State12&>().entry_counter == 1,"State12 entry not called correctly");
- // deferred
- p.process_event(eventd());
- BOOST_CHECK_MESSAGE(p.current_state()[0] == 1,"State12 should be active");
- BOOST_CHECK_MESSAGE(p.current_state()[1] == 2,"State21 should be active");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State11&>().exit_counter == 1,"State11 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State11&>().entry_counter == 1,"State11 entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State12&>().entry_counter == 1,"State12 entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State12&>().exit_counter == 0,"State12 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State21&>().exit_counter == 0,"State21 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State21&>().entry_counter == 1,"State21 entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State22&>().exit_counter == 0,"State22 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State22&>().entry_counter == 0,"State22 entry not called correctly");
- p.process_event(event3());
- BOOST_CHECK_MESSAGE(p.current_state()[0] == 1,"State12 should be active");
- BOOST_CHECK_MESSAGE(p.current_state()[1] == 2,"State21 should be active");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State21&>().exit_counter == 1,"State21 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State21&>().entry_counter == 2,"State21 entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State22&>().exit_counter == 1,"State22 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State22&>().entry_counter == 1,"State22 entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_deferred_queue().size() == 1,"Deferred queue should have one element");
- p.clear_deferred_queue();
- p.process_event(event2());
- BOOST_CHECK_MESSAGE(p.current_state()[0] == 4,"State13 should be active");
- BOOST_CHECK_MESSAGE(p.current_state()[1] == 2,"State21 should be active");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State21&>().exit_counter == 1,"State21 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State21&>().entry_counter == 2,"State21 entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State22&>().exit_counter == 1,"State22 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<player_::State22&>().entry_counter == 1,"State22 entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_deferred_queue().size() == 0,"Deferred queue should have no element");
- }
- }
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