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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> | |
48 | void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Empty" << std::endl;*/} | |
49 | template <class Event,class FSM> | |
50 | 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> | |
55 | void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Open" << std::endl;*/} | |
56 | template <class Event,class FSM> | |
57 | 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> | |
64 | void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Stopped" << std::endl;*/} | |
65 | template <class Event,class FSM> | |
66 | 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> | |
72 | void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Playing" << std::endl;*/} | |
73 | template <class Event,class FSM> | |
74 | 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> | |
81 | void on_entry(Event const&,FSM& ) {/*std::cout << "entering: Paused" << std::endl;*/} | |
82 | template <class Event,class FSM> | |
83 | 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> | |
92 | 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> | |
99 | 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> | |
106 | 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> | |
113 | 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> | |
120 | 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> | |
127 | 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> | |
134 | 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> | |
141 | 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> | |
148 | 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> | |
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 | ||
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 | |
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 | ||
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 |