1 // Copyright 2010 Christophe Henry
2 // henry UNDERSCORE christophe AT hotmail DOT com
3 // This is an extended version of the state machine available in the boost::mpl library
4 // Distributed under the same license as the original.
5 // Copyright for the original version:
6 // Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
7 // under the Boost Software License, Version 1.0. (See accompanying
8 // file LICENSE_1_0.txt or copy at
9 // http://www.boost.org/LICENSE_1_0.txt)
10
11 #include <boost/msm/back/state_machine.hpp>
12 #include <boost/msm/front/state_machine_def.hpp>
13
14 namespace msm = boost::msm;
15 namespace mpl = boost::mpl;
16
17 #include <iostream>
18 #ifdef WIN32
19 #include "windows.h"
20 #else
21 #include <sys/time.h>
22 #endif
23
24 namespace test_fsm // Concrete FSM implementation
25 {
26 // events
27 struct play {};
28 struct end_pause {};
29 struct stop {};
30 struct pause {};
31 struct open_close {};
32 struct cd_detected{};
33 struct NextSong {};
34 struct PreviousSong {};
35
36
37 // Concrete FSM implementation
38 struct player_ : public msm::front::state_machine_def<player_>
39 {
40 // no need for exception handling or message queue
41 typedef int no_exception_thrown;
42 typedef int no_message_queue;
43
44 // The list of FSM states
45 struct Empty : public msm::front::state<>
46 {
47 // optional entry/exit methods
48 template <class Event,class FSM>
on_entrytest_fsm::player_::Empty49 void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Empty" << std::endl;*/}
50 template <class Event,class FSM>
on_exittest_fsm::player_::Empty51 void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Empty" << std::endl;*/}
52 };
53 struct Open : public msm::front::state<>
54 {
55 template <class Event,class FSM>
on_entrytest_fsm::player_::Open56 void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Open" << std::endl;*/}
57 template <class Event,class FSM>
on_exittest_fsm::player_::Open58 void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Open" << std::endl;*/}
59 };
60
61 struct Stopped : public msm::front::state<>
62 {
63 // when stopped, the CD is loaded
64 template <class Event,class FSM>
on_entrytest_fsm::player_::Stopped65 void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Stopped" << std::endl;*/}
66 template <class Event,class FSM>
on_exittest_fsm::player_::Stopped67 void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Stopped" << std::endl;*/}
68 };
69
70 struct Playing_ : public msm::front::state_machine_def<Playing_>
71 {
72 // no need for exception handling or message queue
73 typedef int no_exception_thrown;
74 typedef int no_message_queue;
75
76 // The list of FSM states
77 struct Song1 : public msm::front::state<> {};
78 struct Song2 : public msm::front::state<> {};
79 struct Song3 : public msm::front::state<> {};
80 // the initial state. Must be defined
81 typedef Song1 initial_state;
82 // transition actions
start_next_songtest_fsm::player_::Playing_83 void start_next_song(NextSong const&) { /*std::cout << "Playing::start_next_song\n";*/ }
start_prev_songtest_fsm::player_::Playing_84 void start_prev_song(PreviousSong const&) { /*std::cout << "Playing::start_prev_song\n"; */}
85 // guard conditions
86
87 typedef Playing_ pl; // makes transition table cleaner
88 // Transition table for Playing
89 struct transition_table : mpl::vector4<
90 // Start Event Next Action Guard
91 // +---------+-------------+---------+---------------------+----------------------+
92 a_row < Song1 , NextSong , Song2 , &pl::start_next_song >,
93 a_row < Song2 , PreviousSong, Song1 , &pl::start_prev_song >,
94 a_row < Song2 , NextSong , Song3 , &pl::start_next_song >,
95 a_row < Song3 , PreviousSong, Song2 , &pl::start_prev_song >
96 // +---------+-------------+---------+---------------------+----------------------+
97 > {};
98 // Replaces the default no-transition response.
99 template <class FSM,class Event>
no_transitiontest_fsm::player_::Playing_100 void no_transition(Event const& e, FSM&,int state)
101 {
102 std::cout << "no transition from state " << state
103 << " on event " << typeid(e).name() << std::endl;
104 }
105 };
106 typedef msm::back::state_machine<Playing_> Playing;
107
108 // state not defining any entry or exit
109 struct Paused : public msm::front::state<>
110 {
111 template <class Event,class FSM>
on_entrytest_fsm::player_::Paused112 void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Paused" << std::endl;*/}
113 template <class Event,class FSM>
on_exittest_fsm::player_::Paused114 void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Paused" << std::endl;*/}
115 };
116
117 // the initial state of the player SM. Must be defined
118 typedef Empty initial_state;
119
120 // transition actions
start_playbacktest_fsm::player_121 void start_playback(play const&) { }
open_drawertest_fsm::player_122 void open_drawer(open_close const&) { }
close_drawertest_fsm::player_123 void close_drawer(open_close const&) { }
store_cd_infotest_fsm::player_124 void store_cd_info(cd_detected const& cd) { }
stop_playbacktest_fsm::player_125 void stop_playback(stop const&) { }
pause_playbacktest_fsm::player_126 void pause_playback(pause const&) { }
resume_playbacktest_fsm::player_127 void resume_playback(end_pause const&) { }
stop_and_opentest_fsm::player_128 void stop_and_open(open_close const&) { }
stopped_againtest_fsm::player_129 void stopped_again(stop const&){}
130 // guard conditions
131
132 typedef player_ p; // makes transition table cleaner
133
134 // Transition table for player
135 struct transition_table : mpl::vector<
136 // Start Event Next Action Guard
137 // +---------+-------------+---------+---------------------+----------------------+
138 a_row < Stopped , play , Playing , &p::start_playback >,
139 a_row < Stopped , open_close , Open , &p::open_drawer >,
140 a_row < Stopped , stop , Stopped , &p::stopped_again >,
141 // +---------+-------------+---------+---------------------+----------------------+
142 a_row < Open , open_close , Empty , &p::close_drawer >,
143 // +---------+-------------+---------+---------------------+----------------------+
144 a_row < Empty , open_close , Open , &p::open_drawer >,
145 a_row < Empty , cd_detected , Stopped , &p::store_cd_info >,
146 // +---------+-------------+---------+---------------------+----------------------+
147 a_row < Playing , stop , Stopped , &p::stop_playback >,
148 a_row < Playing , pause , Paused , &p::pause_playback >,
149 a_row < Playing , open_close , Open , &p::stop_and_open >,
150 // +---------+-------------+---------+---------------------+----------------------+
151 a_row < Paused , end_pause , Playing , &p::resume_playback >,
152 a_row < Paused , stop , Stopped , &p::stop_playback >,
153 a_row < Paused , open_close , Open , &p::stop_and_open >
154 // +---------+-------------+---------+---------------------+----------------------+
155 > {};
156
157 // Replaces the default no-transition response.
158 template <class FSM,class Event>
no_transitiontest_fsm::player_159 void no_transition(Event const& e, FSM&,int state)
160 {
161 std::cout << "no transition from state " << state
162 << " on event " << typeid(e).name() << std::endl;
163 }
164 };
165 typedef msm::back::state_machine<player_> player;
166
167 //
168 // Testing utilities.
169 //
170 static char const* const state_names[] = { "Stopped", "Open", "Empty", "Playing", "Paused" };
171
pstate(player const & p)172 void pstate(player const& p)
173 {
174 std::cout << " -> " << state_names[p.current_state()[0]] << std::endl;
175 }
176
177 }
178
179 #ifndef WIN32
mtime(struct timeval & tv1,struct timeval & tv2)180 long mtime(struct timeval& tv1,struct timeval& tv2)
181 {
182 return (tv2.tv_sec-tv1.tv_sec) *1000000 + ((tv2.tv_usec-tv1.tv_usec));
183 }
184 #endif
185
186
main()187 int main()
188 {
189 // for timing
190 #ifdef WIN32
191 LARGE_INTEGER res;
192 ::QueryPerformanceFrequency(&res);
193 LARGE_INTEGER li,li2;
194 #else
195 struct timeval tv1,tv2;
196 gettimeofday(&tv1,NULL);
197 #endif
198
199 test_fsm::player p2;
200 p2.start();
201 // for timing
202 #ifdef WIN32
203 ::QueryPerformanceCounter(&li);
204 #else
205 gettimeofday(&tv1,NULL);
206 #endif
207 for (int i=0;i<100;++i)
208 {
209 p2.process_event(test_fsm::open_close());
210 p2.process_event(test_fsm::open_close());
211 p2.process_event(test_fsm::cd_detected());
212 p2.process_event(test_fsm::play());
213 for (int j=0;j<100;++j)
214 {
215 p2.process_event(test_fsm::NextSong());
216 p2.process_event(test_fsm::NextSong());
217 p2.process_event(test_fsm::PreviousSong());
218 p2.process_event(test_fsm::PreviousSong());
219 }
220
221 p2.process_event(test_fsm::pause());
222 // go back to Playing
223 p2.process_event(test_fsm::end_pause());
224 p2.process_event(test_fsm::pause());
225 p2.process_event(test_fsm::stop());
226 // event leading to the same state
227 p2.process_event(test_fsm::stop());
228 p2.process_event(test_fsm::open_close());
229 p2.process_event(test_fsm::open_close());
230 }
231 #ifdef WIN32
232 ::QueryPerformanceCounter(&li2);
233 #else
234 gettimeofday(&tv2,NULL);
235 #endif
236 #ifdef WIN32
237 std::cout << "msm took in s:" << (double)(li2.QuadPart-li.QuadPart)/res.QuadPart <<"\n" <<std::endl;
238 #else
239 std::cout << "msm took in us:" << mtime(tv1,tv2) <<"\n" <<std::endl;
240 #endif
241 return 0;
242 }
243
244