| // 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> |
| #include <boost/msm/front/euml/euml.hpp> |
| |
| #define BOOST_TEST_MODULE MyTest |
| #include <boost/test/unit_test.hpp> |
| |
| namespace msm = boost::msm; |
| using namespace boost::msm::front::euml; |
| |
| namespace |
| { |
| // events |
| BOOST_MSM_EUML_EVENT(event1) |
| |
| // The list of FSM states |
| BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,entry_counter) |
| BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,exit_counter) |
| |
| BOOST_MSM_EUML_STATE(( ++state_(entry_counter),++state_(exit_counter),attributes_ << entry_counter << exit_counter),State1) |
| BOOST_MSM_EUML_STATE(( ++state_(entry_counter),++state_(exit_counter),attributes_ << entry_counter << exit_counter),State2) |
| BOOST_MSM_EUML_STATE(( ++state_(entry_counter),++state_(exit_counter),attributes_ << entry_counter << exit_counter),State3) |
| BOOST_MSM_EUML_STATE(( ++state_(entry_counter),++state_(exit_counter),attributes_ << entry_counter << exit_counter),State4) |
| |
| BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,state2_to_state3_counter) |
| BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,state3_to_state4_counter) |
| BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,always_true_counter) |
| BOOST_MSM_EUML_DECLARE_ATTRIBUTE(unsigned int,always_false_counter) |
| |
| // transition actions |
| BOOST_MSM_EUML_ACTION(State2ToState3) |
| { |
| template <class FSM,class EVT,class SourceState,class TargetState> |
| void operator()(EVT const& ,FSM& fsm,SourceState& ,TargetState& ) |
| { |
| ++fsm.get_attribute(state2_to_state3_counter); |
| } |
| }; |
| BOOST_MSM_EUML_ACTION(State3ToState4) |
| { |
| template <class FSM,class EVT,class SourceState,class TargetState> |
| void operator()(EVT const& ,FSM& fsm,SourceState& ,TargetState& ) |
| { |
| ++fsm.get_attribute(state3_to_state4_counter); |
| } |
| }; |
| // guard conditions |
| BOOST_MSM_EUML_ACTION(always_true) |
| { |
| template <class FSM,class EVT,class SourceState,class TargetState> |
| bool operator()(EVT const& evt,FSM& fsm,SourceState& ,TargetState& ) |
| { |
| ++fsm.get_attribute(always_true_counter); |
| return true; |
| } |
| }; |
| BOOST_MSM_EUML_ACTION(always_false) |
| { |
| template <class FSM,class EVT,class SourceState,class TargetState> |
| bool operator()(EVT const& evt,FSM& fsm,SourceState& ,TargetState& ) |
| { |
| ++fsm.get_attribute(always_false_counter); |
| return false; |
| } |
| }; |
| |
| BOOST_MSM_EUML_ACTION(No_Transition) |
| { |
| template <class FSM,class Event> |
| void operator()(Event const&,FSM&,int) |
| { |
| BOOST_FAIL("no_transition called!"); |
| } |
| }; |
| |
| BOOST_MSM_EUML_TRANSITION_TABLE(( |
| State2 == State1 , |
| State3 == State2 / State2ToState3, |
| State4 == State3 [always_true] / State3ToState4, |
| State4 == State3 [always_false], |
| State1 == State4 + event1 |
| // +------------------------------------------------------------------------------+ |
| ),transition_table) |
| |
| // create a state machine "on the fly" |
| BOOST_MSM_EUML_DECLARE_STATE_MACHINE(( transition_table, //STT |
| init_ << State1, // Init State |
| no_action, // Entry |
| no_action, // Exit |
| attributes_ << state2_to_state3_counter << state3_to_state4_counter |
| << always_true_counter << always_false_counter, // Attributes |
| configure_ << no_configure_, // configuration |
| No_Transition // no_transition handler |
| ), |
| my_machine_) //fsm name |
| |
| // Pick a back-end |
| typedef msm::back::state_machine<my_machine_> my_machine; |
| |
| //static char const* const state_names[] = { "State1", "State2", "State3", "State4" }; |
| |
| BOOST_AUTO_TEST_CASE( my_test ) |
| { |
| my_machine p; |
| |
| // needed to start the highest-level SM. This will call on_entry and mark the start of the SM |
| // in this case it will also immediately trigger all anonymous transitions |
| p.start(); |
| BOOST_CHECK_MESSAGE(p.current_state()[0] == 3,"State4 should be active"); //State4 |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State1)&>().get_attribute(exit_counter) == 1, |
| "State1 exit not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State1)&>().get_attribute(entry_counter) == 1, |
| "State1 entry not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State2)&>().get_attribute(exit_counter) == 1, |
| "State2 exit not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State2)&>().get_attribute(entry_counter) == 1, |
| "State2 entry not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State3)&>().get_attribute(exit_counter) == 1, |
| "State3 exit not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State3)&>().get_attribute(entry_counter) == 1, |
| "State3 entry not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State4)&>().get_attribute(entry_counter)== 1, |
| "State4 entry not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_attribute(always_true_counter) == 1,"guard not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_attribute(always_false_counter) == 1,"guard not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_attribute(state2_to_state3_counter) == 1,"action not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_attribute(state3_to_state4_counter) == 1,"action not called correctly"); |
| |
| |
| // this event will bring us back to the initial state and thus, a new "loop" will be started |
| p.process_event(event1); |
| BOOST_CHECK_MESSAGE(p.current_state()[0] == 3,"State4 should be active"); //State4 |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State1)&>().get_attribute(exit_counter) == 2, |
| "State1 exit not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State1)&>().get_attribute(entry_counter) == 2, |
| "State1 entry not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State2)&>().get_attribute(exit_counter) == 2, |
| "State2 exit not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State2)&>().get_attribute(entry_counter) == 2, |
| "State2 entry not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State3)&>().get_attribute(exit_counter) == 2, |
| "State3 exit not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State3)&>().get_attribute(entry_counter) == 2, |
| "State3 entry not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_state<BOOST_MSM_EUML_STATE_NAME(State4)&>().get_attribute(entry_counter)== 2, |
| "State4 entry not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_attribute(always_true_counter) == 2,"guard not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_attribute(always_false_counter) == 2,"guard not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_attribute(state2_to_state3_counter) == 2,"action not called correctly"); |
| BOOST_CHECK_MESSAGE(p.get_attribute(state3_to_state4_counter) == 2,"action not called correctly"); |
| |
| } |
| } |
| |