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 #include <boost/msm/front/functor_row.hpp>
14
15 namespace msm = boost::msm;
16 namespace mpl = boost::mpl;
17 using namespace msm::front;
18
19 #include <iostream>
20 #ifdef WIN32
21 #include "windows.h"
22 #else
23 #include <sys/time.h>
24 #endif
25
26 namespace test_fsm // Concrete FSM implementation
27 {
28 // events
29 struct play {};
30 struct end_pause {};
31 struct stop {};
32 struct pause {};
33 struct open_close {};
34 struct cd_detected{};
35
36 // Concrete FSM implementation
37 struct player_ : public msm::front::state_machine_def<player_>
38 {
39 // no need for exception handling or message queue
40 typedef int no_exception_thrown;
41 typedef int no_message_queue;
42
43 // The list of FSM states
44 struct Empty : public msm::front::state<>
45 {
46 // optional entry/exit methods
47 template <class Event,class FSM>
on_entrytest_fsm::player_::Empty48 void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Empty" << std::endl;*/}
49 template <class Event,class FSM>
on_exittest_fsm::player_::Empty50 void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Empty" << std::endl;*/}
51 };
52 struct Open : public msm::front::state<>
53 {
54 template <class Event,class FSM>
on_entrytest_fsm::player_::Open55 void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Open" << std::endl;*/}
56 template <class Event,class FSM>
on_exittest_fsm::player_::Open57 void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Open" << std::endl;*/}
58 };
59
60 struct Stopped : public msm::front::state<>
61 {
62 // when stopped, the CD is loaded
63 template <class Event,class FSM>
on_entrytest_fsm::player_::Stopped64 void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Stopped" << std::endl;*/}
65 template <class Event,class FSM>
on_exittest_fsm::player_::Stopped66 void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Stopped" << std::endl;*/}
67 };
68
69 struct Playing : public msm::front::state<>
70 {
71 template <class Event,class FSM>
on_entrytest_fsm::player_::Playing72 void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Playing" << std::endl;*/}
73 template <class Event,class FSM>
on_exittest_fsm::player_::Playing74 void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Playing" << std::endl;*/}
75 };
76
77 // state not defining any entry or exit
78 struct Paused : public msm::front::state<>
79 {
80 template <class Event,class FSM>
on_entrytest_fsm::player_::Paused81 void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Paused" << std::endl;*/}
82 template <class Event,class FSM>
on_exittest_fsm::player_::Paused83 void on_exit(Event const&,FSM& ) {/*std::cout << "leaving: Paused" << std::endl;*/}
84 };
85
86 // the initial state of the player SM. Must be defined
87 typedef Empty initial_state;
88 // transition actions
89 struct start_playback
90 {
91 template <class FSM,class EVT,class SourceState,class TargetState>
operator ()test_fsm::player_::start_playback92 void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
93 {
94 }
95 };
96 struct open_drawer
97 {
98 template <class FSM,class EVT,class SourceState,class TargetState>
operator ()test_fsm::player_::open_drawer99 void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
100 {
101 }
102 };
103 struct close_drawer
104 {
105 template <class FSM,class EVT,class SourceState,class TargetState>
operator ()test_fsm::player_::close_drawer106 void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
107 {
108 }
109 };
110 struct store_cd_info
111 {
112 template <class FSM,class EVT,class SourceState,class TargetState>
operator ()test_fsm::player_::store_cd_info113 void operator()(EVT const&, FSM& fsm ,SourceState& ,TargetState& )
114 {
115 }
116 };
117 struct stop_playback
118 {
119 template <class FSM,class EVT,class SourceState,class TargetState>
operator ()test_fsm::player_::stop_playback120 void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
121 {
122 }
123 };
124 struct pause_playback
125 {
126 template <class FSM,class EVT,class SourceState,class TargetState>
operator ()test_fsm::player_::pause_playback127 void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
128 {
129 }
130 };
131 struct resume_playback
132 {
133 template <class FSM,class EVT,class SourceState,class TargetState>
operator ()test_fsm::player_::resume_playback134 void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
135 {
136 }
137 };
138 struct stop_and_open
139 {
140 template <class FSM,class EVT,class SourceState,class TargetState>
operator ()test_fsm::player_::stop_and_open141 void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
142 {
143 }
144 };
145 struct stopped_again
146 {
147 template <class FSM,class EVT,class SourceState,class TargetState>
operator ()test_fsm::player_::stopped_again148 void operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
149 {
150 }
151 };
152 // guard conditions
153
154 // Transition table for player
155 struct transition_table : mpl::vector<
156 // Start Event Next Action Guard
157 // +---------+-------------+---------+---------------------+----------------------+
158 Row < Stopped , play , Playing , start_playback >,
159 Row < Stopped , open_close , Open , open_drawer >,
160 Row < Stopped , stop , Stopped , stopped_again >,
161 // +---------+-------------+---------+---------------------+----------------------+
162 Row < Open , open_close , Empty , close_drawer >,
163 // +---------+-------------+---------+---------------------+----------------------+
164 Row < Empty , open_close , Open , open_drawer >,
165 Row < Empty , cd_detected , Stopped , store_cd_info >,
166 // +---------+-------------+---------+---------------------+----------------------+
167 Row < Playing , stop , Stopped , stop_playback >,
168 Row < Playing , pause , Paused , pause_playback >,
169 Row < Playing , open_close , Open , stop_and_open >,
170 // +---------+-------------+---------+---------------------+----------------------+
171 Row < Paused , end_pause , Playing , resume_playback >,
172 Row < Paused , stop , Stopped , stop_playback >,
173 Row < Paused , open_close , Open , stop_and_open >
174 // +---------+-------------+---------+---------------------+----------------------+
175 > {};
176
177 // Replaces the default no-transition response.
178 template <class FSM,class Event>
no_transitiontest_fsm::player_179 void no_transition(Event const& e, FSM&,int state)
180 {
181 std::cout << "no transition from state " << state
182 << " on event " << typeid(e).name() << std::endl;
183 }
184 };
185 typedef msm::back::state_machine<player_> player;
186
187 //
188 // Testing utilities.
189 //
190 static char const* const state_names[] = { "Stopped", "Open", "Empty", "Playing", "Paused" };
191
pstate(player const & p)192 void pstate(player const& p)
193 {
194 std::cout << " -> " << state_names[p.current_state()[0]] << std::endl;
195 }
196
197 }
198
199 #ifndef WIN32
mtime(struct timeval & tv1,struct timeval & tv2)200 long mtime(struct timeval& tv1,struct timeval& tv2)
201 {
202 return (tv2.tv_sec-tv1.tv_sec) *1000000 + ((tv2.tv_usec-tv1.tv_usec));
203 }
204 #endif
205
206
main()207 int main()
208 {
209 // for timing
210 #ifdef WIN32
211 LARGE_INTEGER res;
212 ::QueryPerformanceFrequency(&res);
213 LARGE_INTEGER li,li2;
214 #else
215 struct timeval tv1,tv2;
216 gettimeofday(&tv1,NULL);
217 #endif
218 test_fsm::player p2;
219 p2.start();
220 // for timing
221 #ifdef WIN32
222 ::QueryPerformanceCounter(&li);
223 #else
224 gettimeofday(&tv1,NULL);
225 #endif
226 for (int i=0;i<100;++i)
227 {
228 p2.process_event(test_fsm::open_close());
229 p2.process_event(test_fsm::open_close());
230 p2.process_event(test_fsm::cd_detected());
231 p2.process_event(test_fsm::play());
232 p2.process_event(test_fsm::pause());
233 // go back to Playing
234 p2.process_event(test_fsm::end_pause());
235 p2.process_event(test_fsm::pause());
236 p2.process_event(test_fsm::stop());
237 // event leading to the same state
238 p2.process_event(test_fsm::stop());
239 p2.process_event(test_fsm::open_close());
240 p2.process_event(test_fsm::open_close());
241 }
242 #ifdef WIN32
243 ::QueryPerformanceCounter(&li2);
244 #else
245 gettimeofday(&tv2,NULL);
246 #endif
247 #ifdef WIN32
248 std::cout << "msm took in s:" << (double)(li2.QuadPart-li.QuadPart)/res.QuadPart <<"\n" <<std::endl;
249 #else
250 std::cout << "msm took in us:" << mtime(tv1,tv2) <<"\n" <<std::endl;
251 #endif
252 return 0;
253 }
254
255