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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 | /* support multiple event loops? */ |
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48 | #ifdef EV_MULTIPLICITY |
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49 | struct ev_loop; |
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50 | # define EV_P struct ev_loop *loop |
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51 | # define EV_P_ EV_P, |
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52 | # define EV_A loop |
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53 | # define EV_A_ EV_A, |
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54 | #else |
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55 | # define EV_P void |
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56 | # define EV_P_ |
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57 | # define EV_A |
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58 | # define EV_A_ |
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59 | |
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60 | #endif |
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61 | |
35 | /* eventmask, revents, events... */ |
62 | /* eventmask, revents, events... */ |
36 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
63 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
37 | #define EV_NONE 0x00 |
64 | #define EV_NONE 0x00 |
38 | #define EV_READ 0x01 |
65 | #define EV_READ 0x01 |
39 | #define EV_WRITE 0x02 |
66 | #define EV_WRITE 0x02 |
40 | #define EV_REIFY 0x04 /* private */ |
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41 | #define EV_TIMEOUT 0x000100 |
67 | #define EV_TIMEOUT 0x000100 |
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68 | #define EV_PERIODIC 0x000200 |
42 | #define EV_SIGNAL 0x000200 |
69 | #define EV_SIGNAL 0x000400 |
43 | #define EV_IDLE 0x000400 |
70 | #define EV_IDLE 0x000800 |
44 | #define EV_CHECK 0x000800 |
71 | #define EV_CHECK 0x001000 |
45 | #define EV_PREPARE 0x001000 |
72 | #define EV_PREPARE 0x002000 |
46 | #define EV_CHILD 0x002000 |
73 | #define EV_CHILD 0x004000 |
47 | #define EV_ERROR 0x800000 /* sent when an error occurs */ |
74 | #define EV_ERROR 0x800000 /* sent when an error occurs */ |
48 | |
75 | |
49 | /* can be used to add custom fields to all watchers */ |
76 | /* can be used to add custom fields to all watchers */ |
50 | #ifndef EV_COMMON |
77 | #ifndef EV_COMMON |
51 | # define EV_COMMON void *data |
78 | # define EV_COMMON void *data |
52 | #endif |
79 | #endif |
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66 | |
93 | |
67 | /* shared by all watchers */ |
94 | /* shared by all watchers */ |
68 | #define EV_WATCHER(type) \ |
95 | #define EV_WATCHER(type) \ |
69 | int active; /* private */ \ |
96 | int active; /* private */ \ |
70 | int pending; /* private */ \ |
97 | int pending; /* private */ \ |
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98 | int priority; /* ro */ \ |
71 | EV_COMMON; /* rw */ \ |
99 | EV_COMMON; /* rw */ \ |
72 | void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ |
100 | void (*cb)(EV_P_ struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ |
73 | |
101 | |
74 | #define EV_WATCHER_LIST(type) \ |
102 | #define EV_WATCHER_LIST(type) \ |
75 | EV_WATCHER (type); \ |
103 | EV_WATCHER (type); \ |
76 | struct type *next /* private */ |
104 | struct ev_watcher_list *next /* private */ |
77 | |
105 | |
78 | #define EV_WATCHER_TIME(type) \ |
106 | #define EV_WATCHER_TIME(type) \ |
79 | EV_WATCHER (type); \ |
107 | EV_WATCHER (type); \ |
80 | ev_tstamp at /* private */ |
108 | ev_tstamp at /* private */ |
81 | |
109 | |
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93 | struct ev_watcher_time { |
121 | struct ev_watcher_time { |
94 | EV_WATCHER_TIME (ev_watcher_time); |
122 | EV_WATCHER_TIME (ev_watcher_time); |
95 | }; |
123 | }; |
96 | |
124 | |
97 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
125 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
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126 | /* revent EV_TIMEOUT */ |
98 | struct ev_timer |
127 | struct ev_timer |
99 | { |
128 | { |
100 | EV_WATCHER_TIME (ev_timer); |
129 | EV_WATCHER_TIME (ev_timer); |
101 | |
130 | |
102 | ev_tstamp repeat; /* rw */ |
131 | ev_tstamp repeat; /* rw */ |
103 | }; |
132 | }; |
104 | |
133 | |
105 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
134 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
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135 | /* revent EV_PERIODIC */ |
106 | struct ev_periodic |
136 | struct ev_periodic |
107 | { |
137 | { |
108 | EV_WATCHER_TIME (ev_periodic); |
138 | EV_WATCHER_TIME (ev_periodic); |
109 | |
139 | |
110 | ev_tstamp interval; /* rw */ |
140 | ev_tstamp interval; /* rw */ |
111 | }; |
141 | }; |
112 | |
142 | |
113 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
143 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
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144 | /* revent EV_READ, EV_WRITE */ |
114 | struct ev_io |
145 | struct ev_io |
115 | { |
146 | { |
116 | EV_WATCHER_LIST (ev_io); |
147 | EV_WATCHER_LIST (ev_io); |
117 | |
148 | |
118 | int fd; /* ro */ |
149 | int fd; /* ro */ |
119 | int events; /* ro */ |
150 | int events; /* ro */ |
120 | }; |
151 | }; |
121 | |
152 | |
122 | /* invoked when the given signal has been received */ |
153 | /* invoked when the given signal has been received */ |
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154 | /* revent EV_SIGNAL */ |
123 | struct ev_signal |
155 | struct ev_signal |
124 | { |
156 | { |
125 | EV_WATCHER_LIST (ev_signal); |
157 | EV_WATCHER_LIST (ev_signal); |
126 | |
158 | |
127 | int signum; /* ro */ |
159 | int signum; /* ro */ |
128 | }; |
160 | }; |
129 | |
161 | |
130 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
162 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
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163 | /* revent EV_IDLE */ |
131 | struct ev_idle |
164 | struct ev_idle |
132 | { |
165 | { |
133 | EV_WATCHER (ev_idle); |
166 | EV_WATCHER (ev_idle); |
134 | }; |
167 | }; |
135 | |
168 | |
136 | /* invoked for each run of the mainloop, just before the blocking call */ |
169 | /* invoked for each run of the mainloop, just before the blocking call */ |
137 | /* you can still change events in any way you like */ |
170 | /* you can still change events in any way you like */ |
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171 | /* revent EV_PREPARE */ |
138 | struct ev_prepare |
172 | struct ev_prepare |
139 | { |
173 | { |
140 | EV_WATCHER (ev_prepare); |
174 | EV_WATCHER (ev_prepare); |
141 | }; |
175 | }; |
142 | |
176 | |
143 | /* invoked for each run of the mainloop, just after the blocking call */ |
177 | /* invoked for each run of the mainloop, just after the blocking call */ |
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178 | /* revent EV_CHECK */ |
144 | struct ev_check |
179 | struct ev_check |
145 | { |
180 | { |
146 | EV_WATCHER (ev_check); |
181 | EV_WATCHER (ev_check); |
147 | }; |
182 | }; |
148 | |
183 | |
149 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
184 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
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185 | /* revent EV_CHILD */ |
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186 | /* does not support priorities */ |
150 | struct ev_child |
187 | struct ev_child |
151 | { |
188 | { |
152 | EV_WATCHER_LIST (ev_child); |
189 | EV_WATCHER_LIST (ev_child); |
153 | |
190 | |
154 | int pid; /* ro */ |
191 | int pid; /* ro */ |
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192 | int rpid; /* rw, holds the received pid */ |
155 | int status; /* rw, holds the exit status, use the macros from sys/wait.h */ |
193 | int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ |
156 | }; |
194 | }; |
157 | |
195 | |
158 | #define EVMETHOD_NONE 0 |
196 | #define EVMETHOD_AUTO 0 /* consults environment */ |
159 | #define EVMETHOD_SELECT 1 |
197 | #define EVMETHOD_SELECT 1 |
160 | #define EVMETHOD_EPOLL 2 |
198 | #define EVMETHOD_POLL 2 |
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199 | #define EVMETHOD_EPOLL 4 |
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200 | #define EVMETHOD_KQUEUE 8 |
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201 | #define EVMETHOD_DEVPOLL 16 /* NYI */ |
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202 | #define EVMETHOD_PORT 32 /* NYI */ |
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203 | #define EVMETHOD_ANY ~0 /* any method, do not consult env */ |
161 | #if EV_PROTOTYPES |
204 | #if EV_PROTOTYPES |
162 | extern int ev_method; |
205 | int ev_method (EV_P); |
163 | int ev_init (int flags); /* returns ev_method */ |
206 | int ev_init (EV_P_ int methods); /* returns ev_method */ |
164 | int ev_version_major (void); |
207 | int ev_version_major (void); |
165 | int ev_version_minor (void); |
208 | int ev_version_minor (void); |
166 | |
209 | |
167 | /* these three calls are suitable for plugging into pthread_atfork */ |
210 | /* these three calls are suitable for plugging into pthread_atfork */ |
168 | void ev_prefork (void); |
211 | void ev_fork_prepare (void); |
169 | void ev_postfork_parent (void); |
212 | void ev_fork_parent (void); |
170 | void ev_postfork_child (void); |
213 | void ev_fork_child (void); |
171 | |
214 | |
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); |
215 | ev_tstamp ev_time (void); |
174 | #endif |
216 | #endif |
175 | |
217 | |
176 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
218 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
177 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
219 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
178 | #if EV_PROTOTYPES |
220 | #if EV_PROTOTYPES |
179 | void ev_loop (int flags); |
221 | 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 */ |
222 | 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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223 | |
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224 | ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ |
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225 | |
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226 | /* |
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227 | * ref/unref can be used to add or remove a refcount on the mainloop. every watcher |
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228 | * keeps one reference. if you have a long-runing watcher you never unregister that |
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229 | * should not keep ev_loop from running, unref() after starting, and ref() before stopping. |
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230 | */ |
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231 | void ev_ref (EV_P); |
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232 | void ev_unref (EV_P); |
181 | |
233 | |
182 | /* convinience function, wait for a single event, without registering an event watcher */ |
234 | /* convinience function, wait for a single event, without registering an event watcher */ |
183 | /* if timeout is < 0, do wait indefinitely */ |
235 | /* 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); |
236 | void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
185 | #endif |
237 | #endif |
186 | |
238 | |
187 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
239 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
188 | /* either use evw_init + evXXX_set, or the evXXX_init macro, below, to first initialise a watcher */ |
240 | /* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
189 | #define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0) |
241 | #define ev_watcher_init(ev,cb_) do { (ev)->active = (ev)->pending = (ev)->priority = 0; (ev)->cb = (cb_); } while (0) |
190 | |
242 | |
191 | #define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
243 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
192 | #define evtimer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
244 | #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
193 | #define evperiodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
245 | #define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
194 | #define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
246 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
195 | #define evidle_set(ev) /* nop, yes, this is a serious in-joke */ |
247 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
196 | #define evprepare_set(ev) /* nop, yes, this is a serious in-joke */ |
248 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
197 | #define evcheck_set(ev) /* nop, yes, this is a serious in-joke */ |
249 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
198 | #define evchild_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) |
250 | #define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) |
199 | |
251 | |
200 | #define evio_init(ev,cb,fd,events) do { evw_init ((ev), (cb)); evio_set ((ev),(fd),(events)); } while (0) |
252 | #define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
201 | #define evtimer_init(ev,cb,after,repeat) do { evw_init ((ev), (cb)); evtimer_set ((ev),(after),(repeat)); } while (0) |
253 | #define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
202 | #define evperiodic_init(ev,cb,at,interval) do { evw_init ((ev), (cb)); evperiodic_set ((ev),(at),(interval)); } while (0) |
254 | #define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0) |
203 | #define evsignal_init(ev,cb,signum) do { evw_init ((ev), (cb)); evsignal_set ((ev), (signum)); } while (0) |
255 | #define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
204 | #define evidle_init(ev,cb) do { evw_init ((ev), (cb)); evidle_set ((ev)); } while (0) |
256 | #define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
205 | #define evprepare_init(ev,cb) do { evw_init ((ev), (cb)); evprepare_set ((ev)); } while (0) |
257 | #define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
206 | #define evcheck_init(ev,cb) do { evw_init ((ev), (cb)); evcheck_set ((ev)); } while (0) |
258 | #define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
207 | #define evchild_init(ev,cb,pid) do { evw_init ((ev), (cb)); evchild_set ((ev),(pid)); } while (0) |
259 | #define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) |
208 | |
260 | |
209 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
261 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
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262 | #define ev_set_priority(ev,pri) (ev)->priority = pri |
210 | |
263 | |
211 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
264 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
212 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
265 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
213 | #if EV_PROTOTYPES |
266 | #if EV_PROTOTYPES |
214 | void evio_start (struct ev_io *w); |
267 | void ev_io_start (EV_P_ struct ev_io *w); |
215 | void evio_stop (struct ev_io *w); |
268 | void ev_io_stop (EV_P_ struct ev_io *w); |
216 | |
269 | |
217 | void evtimer_start (struct ev_timer *w); |
270 | void ev_timer_start (EV_P_ struct ev_timer *w); |
218 | void evtimer_stop (struct ev_timer *w); |
271 | void ev_timer_stop (EV_P_ struct ev_timer *w); |
219 | void evtimer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
272 | 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 | |
273 | |
221 | void evperiodic_start (struct ev_periodic *w); |
274 | void ev_periodic_start (EV_P_ struct ev_periodic *w); |
222 | void evperiodic_stop (struct ev_periodic *w); |
275 | void ev_periodic_stop (EV_P_ struct ev_periodic *w); |
223 | |
276 | |
224 | void evsignal_start (struct ev_signal *w); |
277 | void ev_signal_start (EV_P_ struct ev_signal *w); |
225 | void evsignal_stop (struct ev_signal *w); |
278 | void ev_signal_stop (EV_P_ struct ev_signal *w); |
226 | |
279 | |
227 | void evidle_start (struct ev_idle *w); |
280 | void ev_idle_start (EV_P_ struct ev_idle *w); |
228 | void evidle_stop (struct ev_idle *w); |
281 | void ev_idle_stop (EV_P_ struct ev_idle *w); |
229 | |
282 | |
230 | void evprepare_start (struct ev_prepare *w); |
283 | void ev_prepare_start (EV_P_ struct ev_prepare *w); |
231 | void evprepare_stop (struct ev_prepare *w); |
284 | void ev_prepare_stop (EV_P_ struct ev_prepare *w); |
232 | |
285 | |
233 | void evcheck_start (struct ev_check *w); |
286 | void ev_check_start (EV_P_ struct ev_check *w); |
234 | void evcheck_stop (struct ev_check *w); |
287 | void ev_check_stop (EV_P_ struct ev_check *w); |
235 | |
288 | |
236 | void evchild_start (struct ev_child *w); |
289 | void ev_child_start (EV_P_ struct ev_child *w); |
237 | void evchild_stop (struct ev_child *w); |
290 | void ev_child_stop (EV_P_ struct ev_child *w); |
238 | #endif |
291 | #endif |
239 | |
292 | |
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293 | #ifdef __cplusplus |
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294 | } |
240 | #endif |
295 | #endif |
241 | |
296 | |
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297 | #endif |
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298 | |