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28 | */ |
28 | */ |
29 | |
29 | |
30 | #ifndef EV_H |
30 | #ifndef EV_H |
31 | #define EV_H |
31 | #define EV_H |
32 | |
32 | |
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33 | #ifdef __cplusplus |
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34 | extern "C" { |
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35 | #endif |
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36 | |
33 | typedef double ev_tstamp; |
37 | typedef double ev_tstamp; |
34 | |
38 | |
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39 | /* these priorities are inclusive, higher priorities will be called earlier */ |
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40 | #ifndef EV_MINPRI |
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41 | # define EV_MINPRI -2 |
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42 | #endif |
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43 | #ifndef EV_MAXPRI |
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44 | # define EV_MAXPRI +2 |
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45 | #endif |
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46 | |
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47 | #define EV_P void |
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48 | #define EV_P_ |
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49 | #define EV_A |
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50 | #define EV_A_ |
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51 | |
35 | /* eventmask, revents, events... */ |
52 | /* eventmask, revents, events... */ |
36 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
53 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
37 | #define EV_NONE 0x00 |
54 | #define EV_NONE 0x00 |
38 | #define EV_READ 0x01 |
55 | #define EV_READ 0x01 |
39 | #define EV_WRITE 0x02 |
56 | #define EV_WRITE 0x02 |
40 | #define EV_REIFY 0x04 /* private */ |
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41 | #define EV_TIMEOUT 0x000100 |
57 | #define EV_TIMEOUT 0x000100 |
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58 | #define EV_PERIODIC 0x000200 |
42 | #define EV_SIGNAL 0x000200 |
59 | #define EV_SIGNAL 0x000400 |
43 | #define EV_IDLE 0x000400 |
60 | #define EV_IDLE 0x000800 |
44 | #define EV_CHECK 0x000800 |
61 | #define EV_CHECK 0x001000 |
45 | #define EV_PREPARE 0x001000 |
62 | #define EV_PREPARE 0x002000 |
46 | #define EV_CHILD 0x002000 |
63 | #define EV_CHILD 0x004000 |
47 | #define EV_ERROR 0x800000 /* sent when an error occurs */ |
64 | #define EV_ERROR 0x800000 /* sent when an error occurs */ |
48 | |
65 | |
49 | /* can be used to add custom fields to all watchers */ |
66 | /* can be used to add custom fields to all watchers */ |
50 | #ifndef EV_COMMON |
67 | #ifndef EV_COMMON |
51 | # define EV_COMMON void *data |
68 | # define EV_COMMON void *data |
52 | #endif |
69 | #endif |
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66 | |
83 | |
67 | /* shared by all watchers */ |
84 | /* shared by all watchers */ |
68 | #define EV_WATCHER(type) \ |
85 | #define EV_WATCHER(type) \ |
69 | int active; /* private */ \ |
86 | int active; /* private */ \ |
70 | int pending; /* private */ \ |
87 | int pending; /* private */ \ |
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88 | int priority; /* ro */ \ |
71 | EV_COMMON; /* rw */ \ |
89 | EV_COMMON; /* rw */ \ |
72 | void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ |
90 | void (*cb)(EV_P_ struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ |
73 | |
91 | |
74 | #define EV_WATCHER_LIST(type) \ |
92 | #define EV_WATCHER_LIST(type) \ |
75 | EV_WATCHER (type); \ |
93 | EV_WATCHER (type); \ |
76 | struct type *next /* private */ |
94 | struct ev_watcher_list *next /* private */ |
77 | |
95 | |
78 | #define EV_WATCHER_TIME(type) \ |
96 | #define EV_WATCHER_TIME(type) \ |
79 | EV_WATCHER (type); \ |
97 | EV_WATCHER (type); \ |
80 | ev_tstamp at /* private */ |
98 | ev_tstamp at /* private */ |
81 | |
99 | |
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93 | struct ev_watcher_time { |
111 | struct ev_watcher_time { |
94 | EV_WATCHER_TIME (ev_watcher_time); |
112 | EV_WATCHER_TIME (ev_watcher_time); |
95 | }; |
113 | }; |
96 | |
114 | |
97 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
115 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
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116 | /* revent EV_TIMEOUT */ |
98 | struct ev_timer |
117 | struct ev_timer |
99 | { |
118 | { |
100 | EV_WATCHER_TIME (ev_timer); |
119 | EV_WATCHER_TIME (ev_timer); |
101 | |
120 | |
102 | ev_tstamp repeat; /* rw */ |
121 | ev_tstamp repeat; /* rw */ |
103 | }; |
122 | }; |
104 | |
123 | |
105 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
124 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
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125 | /* revent EV_PERIODIC */ |
106 | struct ev_periodic |
126 | struct ev_periodic |
107 | { |
127 | { |
108 | EV_WATCHER_TIME (ev_periodic); |
128 | EV_WATCHER_TIME (ev_periodic); |
109 | |
129 | |
110 | ev_tstamp interval; /* rw */ |
130 | ev_tstamp interval; /* rw */ |
111 | }; |
131 | }; |
112 | |
132 | |
113 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
133 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
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134 | /* revent EV_READ, EV_WRITE */ |
114 | struct ev_io |
135 | struct ev_io |
115 | { |
136 | { |
116 | EV_WATCHER_LIST (ev_io); |
137 | EV_WATCHER_LIST (ev_io); |
117 | |
138 | |
118 | int fd; /* ro */ |
139 | int fd; /* ro */ |
119 | int events; /* ro */ |
140 | int events; /* ro */ |
120 | }; |
141 | }; |
121 | |
142 | |
122 | /* invoked when the given signal has been received */ |
143 | /* invoked when the given signal has been received */ |
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144 | /* revent EV_SIGNAL */ |
123 | struct ev_signal |
145 | struct ev_signal |
124 | { |
146 | { |
125 | EV_WATCHER_LIST (ev_signal); |
147 | EV_WATCHER_LIST (ev_signal); |
126 | |
148 | |
127 | int signum; /* ro */ |
149 | int signum; /* ro */ |
128 | }; |
150 | }; |
129 | |
151 | |
130 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
152 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
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153 | /* revent EV_IDLE */ |
131 | struct ev_idle |
154 | struct ev_idle |
132 | { |
155 | { |
133 | EV_WATCHER (ev_idle); |
156 | EV_WATCHER (ev_idle); |
134 | }; |
157 | }; |
135 | |
158 | |
136 | /* invoked for each run of the mainloop, just before the blocking call */ |
159 | /* invoked for each run of the mainloop, just before the blocking call */ |
137 | /* you can still change events in any way you like */ |
160 | /* you can still change events in any way you like */ |
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161 | /* revent EV_PREPARE */ |
138 | struct ev_prepare |
162 | struct ev_prepare |
139 | { |
163 | { |
140 | EV_WATCHER (ev_prepare); |
164 | EV_WATCHER (ev_prepare); |
141 | }; |
165 | }; |
142 | |
166 | |
143 | /* invoked for each run of the mainloop, just after the blocking call */ |
167 | /* invoked for each run of the mainloop, just after the blocking call */ |
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168 | /* revent EV_CHECK */ |
144 | struct ev_check |
169 | struct ev_check |
145 | { |
170 | { |
146 | EV_WATCHER (ev_check); |
171 | EV_WATCHER (ev_check); |
147 | }; |
172 | }; |
148 | |
173 | |
149 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
174 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
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175 | /* revent EV_CHILD */ |
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176 | /* does not support priorities */ |
150 | struct ev_child |
177 | struct ev_child |
151 | { |
178 | { |
152 | EV_WATCHER_LIST (ev_child); |
179 | EV_WATCHER_LIST (ev_child); |
153 | |
180 | |
154 | int pid; /* ro */ |
181 | int pid; /* ro */ |
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182 | int rpid; /* rw, holds the received pid */ |
155 | int status; /* rw, holds the exit status, use the macros from sys/wait.h */ |
183 | int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ |
156 | }; |
184 | }; |
157 | |
185 | |
158 | #define EVMETHOD_NONE 0 |
186 | #define EVMETHOD_AUTO 0 /* consults environment */ |
159 | #define EVMETHOD_SELECT 1 |
187 | #define EVMETHOD_SELECT 1 |
160 | #define EVMETHOD_EPOLL 2 |
188 | #define EVMETHOD_POLL 2 |
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189 | #define EVMETHOD_EPOLL 4 |
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190 | #define EVMETHOD_KQUEUE 8 |
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191 | #define EVMETHOD_DEVPOLL 16 /* NYI */ |
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192 | #define EVMETHOD_PORT 32 /* NYI */ |
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193 | #define EVMETHOD_ANY ~0 /* any method, do not consult env */ |
161 | #if EV_PROTOTYPES |
194 | #if EV_PROTOTYPES |
162 | extern int ev_method; |
195 | int ev_method (EV_P); |
163 | int ev_init (int flags); /* returns ev_method */ |
196 | int ev_init (EV_P_ int methods); /* returns ev_method */ |
164 | int ev_version_major (void); |
197 | int ev_version_major (void); |
165 | int ev_version_minor (void); |
198 | int ev_version_minor (void); |
166 | |
199 | |
167 | /* these three calls are suitable for plugging into pthread_atfork */ |
200 | /* these three calls are suitable for plugging into pthread_atfork */ |
168 | void ev_prefork (void); |
201 | void ev_fork_prepare (void); |
169 | void ev_postfork_parent (void); |
202 | void ev_fork_parent (void); |
170 | void ev_postfork_child (void); |
203 | void ev_fork_child (void); |
171 | |
204 | |
172 | extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
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173 | ev_tstamp ev_time (void); |
205 | ev_tstamp ev_time (void); |
174 | #endif |
206 | #endif |
175 | |
207 | |
176 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
208 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
177 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
209 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
178 | #if EV_PROTOTYPES |
210 | #if EV_PROTOTYPES |
179 | void ev_loop (int flags); |
211 | void ev_loop (EV_P_ int flags); |
180 | extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ |
212 | void ev_unloop (EV_P_ int status); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ |
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213 | |
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214 | ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ |
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215 | |
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216 | /* |
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217 | * ref/unref can be used to add or remove a refcount on the mainloop. every watcher |
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218 | * keeps one reference. if you have a long-runing watcher you never unregister that |
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219 | * should not keep ev_loop from running, unref() after starting, and ref() before stopping. |
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220 | */ |
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221 | void ev_ref (EV_P); |
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222 | void ev_unref (EV_P); |
181 | |
223 | |
182 | /* convinience function, wait for a single event, without registering an event watcher */ |
224 | /* convinience function, wait for a single event, without registering an event watcher */ |
183 | /* if timeout is < 0, do wait indefinitely */ |
225 | /* if timeout is < 0, do wait indefinitely */ |
184 | void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
226 | void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
185 | #endif |
227 | #endif |
186 | |
228 | |
187 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
229 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
188 | /* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
230 | /* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
189 | #define ev_watcher_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0) |
231 | #define ev_watcher_init(ev,cb_) do { (ev)->active = (ev)->pending = (ev)->priority = 0; (ev)->cb = (cb_); } while (0) |
190 | |
232 | |
191 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
233 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
192 | #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
234 | #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
193 | #define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
235 | #define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
194 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
236 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
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204 | #define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
246 | #define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
205 | #define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
247 | #define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
206 | #define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
248 | #define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
207 | #define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) |
249 | #define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) |
208 | |
250 | |
209 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
251 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
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252 | #define ev_set_priority(ev,pri) (ev)->priority = pri |
210 | |
253 | |
211 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
254 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
212 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
255 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
213 | #if EV_PROTOTYPES |
256 | #if EV_PROTOTYPES |
214 | void ev_io_start (struct ev_io *w); |
257 | void ev_io_start (EV_P_ struct ev_io *w); |
215 | void ev_io_stop (struct ev_io *w); |
258 | void ev_io_stop (EV_P_ struct ev_io *w); |
216 | |
259 | |
217 | void ev_timer_start (struct ev_timer *w); |
260 | void ev_timer_start (EV_P_ struct ev_timer *w); |
218 | void ev_timer_stop (struct ev_timer *w); |
261 | void ev_timer_stop (EV_P_ struct ev_timer *w); |
219 | void ev_timer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
262 | void ev_timer_again (EV_P_ struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
220 | |
263 | |
221 | void ev_periodic_start (struct ev_periodic *w); |
264 | void ev_periodic_start (EV_P_ struct ev_periodic *w); |
222 | void ev_periodic_stop (struct ev_periodic *w); |
265 | void ev_periodic_stop (EV_P_ struct ev_periodic *w); |
223 | |
266 | |
224 | void ev_signal_start (struct ev_signal *w); |
267 | void ev_signal_start (EV_P_ struct ev_signal *w); |
225 | void ev_signal_stop (struct ev_signal *w); |
268 | void ev_signal_stop (EV_P_ struct ev_signal *w); |
226 | |
269 | |
227 | void ev_idle_start (struct ev_idle *w); |
270 | void ev_idle_start (EV_P_ struct ev_idle *w); |
228 | void ev_idle_stop (struct ev_idle *w); |
271 | void ev_idle_stop (EV_P_ struct ev_idle *w); |
229 | |
272 | |
230 | void ev_prepare_start (struct ev_prepare *w); |
273 | void ev_prepare_start (EV_P_ struct ev_prepare *w); |
231 | void ev_prepare_stop (struct ev_prepare *w); |
274 | void ev_prepare_stop (EV_P_ struct ev_prepare *w); |
232 | |
275 | |
233 | void ev_check_start (struct ev_check *w); |
276 | void ev_check_start (EV_P_ struct ev_check *w); |
234 | void ev_check_stop (struct ev_check *w); |
277 | void ev_check_stop (EV_P_ struct ev_check *w); |
235 | |
278 | |
236 | void ev_child_start (struct ev_child *w); |
279 | void ev_child_start (EV_P_ struct ev_child *w); |
237 | void ev_child_stop (struct ev_child *w); |
280 | void ev_child_stop (EV_P_ struct ev_child *w); |
238 | #endif |
281 | #endif |
239 | |
282 | |
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283 | #ifdef __cplusplus |
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284 | } |
240 | #endif |
285 | #endif |
241 | |
286 | |
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287 | #endif |
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288 | |