… | |
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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 | #ifndef EV_MULTIPLICITY |
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48 | # define EV_MULTIPLICITY 1 |
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49 | #endif |
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50 | |
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51 | /* support multiple event loops? */ |
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52 | #if EV_MULTIPLICITY |
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53 | struct ev_loop; |
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54 | # define EV_P struct ev_loop *loop |
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55 | # define EV_P_ EV_P, |
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56 | # define EV_A loop |
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57 | # define EV_A_ EV_A, |
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58 | #else |
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59 | # define EV_P void |
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60 | # define EV_P_ |
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61 | # define EV_A |
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62 | # define EV_A_ |
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63 | #endif |
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64 | |
35 | /* eventmask, revents, events... */ |
65 | /* eventmask, revents, events... */ |
36 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
66 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
37 | #define EV_NONE 0x00 |
67 | #define EV_NONE 0x00 |
38 | #define EV_READ 0x01 |
68 | #define EV_READ 0x01 |
39 | #define EV_WRITE 0x02 |
69 | #define EV_WRITE 0x02 |
40 | #define EV_REIFY 0x04 /* private */ |
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41 | #define EV_TIMEOUT 0x000100 |
70 | #define EV_TIMEOUT 0x000100 |
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71 | #define EV_PERIODIC 0x000200 |
42 | #define EV_SIGNAL 0x000200 |
72 | #define EV_SIGNAL 0x000400 |
43 | #define EV_IDLE 0x000400 |
73 | #define EV_IDLE 0x000800 |
44 | #define EV_CHECK 0x000800 |
74 | #define EV_CHECK 0x001000 |
45 | #define EV_PREPARE 0x001000 |
75 | #define EV_PREPARE 0x002000 |
46 | #define EV_CHILD 0x002000 |
76 | #define EV_CHILD 0x004000 |
47 | #define EV_ERROR 0x800000 /* sent when an error occurs */ |
77 | #define EV_ERROR 0x800000 /* sent when an error occurs */ |
48 | |
78 | |
49 | /* can be used to add custom fields to all watchers */ |
79 | /* can be used to add custom fields to all watchers */ |
50 | #ifndef EV_COMMON |
80 | #ifndef EV_COMMON |
51 | # define EV_COMMON void *data |
81 | # define EV_COMMON void *data |
52 | #endif |
82 | #endif |
… | |
… | |
66 | |
96 | |
67 | /* shared by all watchers */ |
97 | /* shared by all watchers */ |
68 | #define EV_WATCHER(type) \ |
98 | #define EV_WATCHER(type) \ |
69 | int active; /* private */ \ |
99 | int active; /* private */ \ |
70 | int pending; /* private */ \ |
100 | int pending; /* private */ \ |
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101 | int priority; /* private */ \ |
71 | EV_COMMON; /* rw */ \ |
102 | EV_COMMON; /* rw */ \ |
72 | void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ |
103 | void (*cb)(EV_P_ struct type *, int revents); /* private */ /* gets invoked with an eventmask */ |
73 | |
104 | |
74 | #define EV_WATCHER_LIST(type) \ |
105 | #define EV_WATCHER_LIST(type) \ |
75 | EV_WATCHER (type); \ |
106 | EV_WATCHER (type); \ |
76 | struct type *next /* private */ |
107 | struct ev_watcher_list *next /* private */ |
77 | |
108 | |
78 | #define EV_WATCHER_TIME(type) \ |
109 | #define EV_WATCHER_TIME(type) \ |
79 | EV_WATCHER (type); \ |
110 | EV_WATCHER (type); \ |
80 | ev_tstamp at /* private */ |
111 | ev_tstamp at /* private */ |
81 | |
112 | |
… | |
… | |
93 | struct ev_watcher_time { |
124 | struct ev_watcher_time { |
94 | EV_WATCHER_TIME (ev_watcher_time); |
125 | EV_WATCHER_TIME (ev_watcher_time); |
95 | }; |
126 | }; |
96 | |
127 | |
97 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
128 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
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129 | /* revent EV_TIMEOUT */ |
98 | struct ev_timer |
130 | struct ev_timer |
99 | { |
131 | { |
100 | EV_WATCHER_TIME (ev_timer); |
132 | EV_WATCHER_TIME (ev_timer); |
101 | |
133 | |
102 | ev_tstamp repeat; /* rw */ |
134 | ev_tstamp repeat; /* rw */ |
103 | }; |
135 | }; |
104 | |
136 | |
105 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
137 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
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138 | /* revent EV_PERIODIC */ |
106 | struct ev_periodic |
139 | struct ev_periodic |
107 | { |
140 | { |
108 | EV_WATCHER_TIME (ev_periodic); |
141 | EV_WATCHER_TIME (ev_periodic); |
109 | |
142 | |
110 | ev_tstamp interval; /* rw */ |
143 | ev_tstamp interval; /* rw */ |
111 | }; |
144 | }; |
112 | |
145 | |
113 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
146 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
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147 | /* revent EV_READ, EV_WRITE */ |
114 | struct ev_io |
148 | struct ev_io |
115 | { |
149 | { |
116 | EV_WATCHER_LIST (ev_io); |
150 | EV_WATCHER_LIST (ev_io); |
117 | |
151 | |
118 | int fd; /* ro */ |
152 | int fd; /* ro */ |
119 | int events; /* ro */ |
153 | int events; /* ro */ |
120 | }; |
154 | }; |
121 | |
155 | |
122 | /* invoked when the given signal has been received */ |
156 | /* invoked when the given signal has been received */ |
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157 | /* revent EV_SIGNAL */ |
123 | struct ev_signal |
158 | struct ev_signal |
124 | { |
159 | { |
125 | EV_WATCHER_LIST (ev_signal); |
160 | EV_WATCHER_LIST (ev_signal); |
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161 | #if EV_MULTIPLICITY |
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162 | struct ev_loop *loop; |
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163 | #endif |
126 | |
164 | |
127 | int signum; /* ro */ |
165 | int signum; /* ro */ |
128 | }; |
166 | }; |
129 | |
167 | |
130 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
168 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
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169 | /* revent EV_IDLE */ |
131 | struct ev_idle |
170 | struct ev_idle |
132 | { |
171 | { |
133 | EV_WATCHER (ev_idle); |
172 | EV_WATCHER (ev_idle); |
134 | }; |
173 | }; |
135 | |
174 | |
136 | /* invoked for each run of the mainloop, just before the blocking call */ |
175 | /* invoked for each run of the mainloop, just before the blocking call */ |
137 | /* you can still change events in any way you like */ |
176 | /* you can still change events in any way you like */ |
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177 | /* revent EV_PREPARE */ |
138 | struct ev_prepare |
178 | struct ev_prepare |
139 | { |
179 | { |
140 | EV_WATCHER (ev_prepare); |
180 | EV_WATCHER (ev_prepare); |
141 | }; |
181 | }; |
142 | |
182 | |
143 | /* invoked for each run of the mainloop, just after the blocking call */ |
183 | /* invoked for each run of the mainloop, just after the blocking call */ |
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184 | /* revent EV_CHECK */ |
144 | struct ev_check |
185 | struct ev_check |
145 | { |
186 | { |
146 | EV_WATCHER (ev_check); |
187 | EV_WATCHER (ev_check); |
147 | }; |
188 | }; |
148 | |
189 | |
149 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
190 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
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191 | /* revent EV_CHILD */ |
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192 | /* does not support priorities */ |
150 | struct ev_child |
193 | struct ev_child |
151 | { |
194 | { |
152 | EV_WATCHER_LIST (ev_child); |
195 | EV_WATCHER_LIST (ev_child); |
153 | |
196 | |
154 | int pid; /* ro */ |
197 | int pid; /* ro */ |
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198 | int rpid; /* rw, holds the received pid */ |
155 | int status; /* rw, holds the exit status, use the macros from sys/wait.h */ |
199 | int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ |
156 | }; |
200 | }; |
157 | |
201 | |
158 | #define EVMETHOD_NONE 0 |
202 | union ev_any_watcher |
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203 | { |
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204 | struct ev_watcher w; |
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205 | struct ev_watcher_list wl; |
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206 | struct ev_io io; |
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207 | struct ev_timer timer; |
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208 | struct ev_periodic periodic; |
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209 | struct ev_signal signal; |
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210 | struct ev_idle idle; |
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211 | struct ev_child child; |
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212 | struct ev_prepare prepare; |
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213 | struct ev_check check; |
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214 | }; |
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215 | |
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216 | #define EVMETHOD_AUTO 0 /* consults environment */ |
159 | #define EVMETHOD_SELECT 1 |
217 | #define EVMETHOD_SELECT 1 |
160 | #define EVMETHOD_EPOLL 2 |
218 | #define EVMETHOD_POLL 2 |
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219 | #define EVMETHOD_EPOLL 4 |
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220 | #define EVMETHOD_KQUEUE 8 |
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221 | #define EVMETHOD_DEVPOLL 16 /* NYI */ |
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222 | #define EVMETHOD_PORT 32 /* NYI */ |
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223 | #define EVMETHOD_WIN32 64 /* NYI */ |
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224 | #define EVMETHOD_ANY ~0 /* any method, do not consult env */ |
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225 | |
161 | #if EV_PROTOTYPES |
226 | #if EV_PROTOTYPES |
162 | extern int ev_method; |
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163 | int ev_init (int flags); /* returns ev_method */ |
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164 | int ev_version_major (void); |
227 | int ev_version_major (void); |
165 | int ev_version_minor (void); |
228 | int ev_version_minor (void); |
166 | |
229 | |
167 | /* these three calls are suitable for plugging into pthread_atfork */ |
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168 | void ev_prefork (void); |
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169 | void ev_postfork_parent (void); |
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170 | void ev_postfork_child (void); |
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171 | |
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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); |
230 | ev_tstamp ev_time (void); |
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231 | |
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232 | # if EV_MULTIPLICITY |
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233 | /* the default loop is the only one that handles signals and child watchers */ |
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234 | /* you can call this as often as you like */ |
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235 | struct ev_loop *ev_default_loop (int methods); /* returns default loop */ |
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236 | |
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237 | /* create and destroy alternative loops that don't handle signals */ |
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238 | struct ev_loop *ev_loop_new (int methods); |
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239 | void ev_loop_destroy (EV_P); |
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240 | void ev_loop_fork (EV_P); |
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241 | # else |
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242 | int ev_default_loop (int methods); /* returns true when successful */ |
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243 | # endif |
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244 | |
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245 | void ev_default_destroy (void); /* destroy the default loop */ |
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246 | /* this needs to be called after fork, to duplicate the default loop */ |
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247 | /* if you create alternative loops you have to call ev_loop_fork on them */ |
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248 | /* you can call it in either the parent or the child */ |
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249 | /* you can actually call it at any time, anywhere :) */ |
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250 | void ev_default_fork (void); |
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251 | |
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252 | int ev_method (EV_P); |
174 | #endif |
253 | #endif |
175 | |
254 | |
176 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
255 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
177 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
256 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
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257 | #define EVUNLOOP_ONCE 1 /* unloop once */ |
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258 | #define EVUNLOOP_ALL 2 /* unloop all loops */ |
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259 | |
178 | #if EV_PROTOTYPES |
260 | #if EV_PROTOTYPES |
179 | void ev_loop (int flags); |
261 | 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 */ |
262 | void ev_unloop (EV_P_ int how); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ |
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263 | |
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264 | ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ |
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265 | |
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266 | /* |
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267 | * ref/unref can be used to add or remove a refcount on the mainloop. every watcher |
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268 | * keeps one reference. if you have a long-runing watcher you never unregister that |
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269 | * should not keep ev_loop from running, unref() after starting, and ref() before stopping. |
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270 | */ |
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271 | void ev_ref (EV_P); |
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272 | void ev_unref (EV_P); |
181 | |
273 | |
182 | /* convinience function, wait for a single event, without registering an event watcher */ |
274 | /* convinience function, wait for a single event, without registering an event watcher */ |
183 | /* if timeout is < 0, do wait indefinitely */ |
275 | /* 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); |
276 | void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
185 | #endif |
277 | #endif |
186 | |
278 | |
187 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
279 | /* 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 */ |
280 | /* 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) |
281 | #define ev_watcher_init(ev,cb_) do { \ |
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282 | ((struct ev_watcher *)(void *)(ev))->active = \ |
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283 | ((struct ev_watcher *)(void *)(ev))->pending = \ |
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284 | ((struct ev_watcher *)(void *)(ev))->priority = 0; \ |
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285 | (ev)->cb = (cb_); \ |
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286 | } while (0) |
190 | |
287 | |
191 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
288 | #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) |
289 | #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) |
290 | #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) |
291 | #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) |
301 | #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) |
302 | #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) |
303 | #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) |
304 | #define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) |
208 | |
305 | |
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306 | #define ev_is_pending(ev) (0 + ((struct ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ |
209 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
307 | #define ev_is_active(ev) (0 + ((struct ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ |
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308 | |
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309 | #define ev_priority(ev) ((struct ev_watcher *)(void *)(ev))->priority /* rw */ |
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310 | #define ev_cb(ev) (ev)->cb /* rw */ |
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311 | #define ev_set_priority(ev,pri) ev_priority (ev) = (pri) |
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312 | #define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_) |
210 | |
313 | |
211 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
314 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
212 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
315 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
213 | #if EV_PROTOTYPES |
316 | #if EV_PROTOTYPES |
214 | void ev_io_start (struct ev_io *w); |
317 | void ev_io_start (EV_P_ struct ev_io *w); |
215 | void ev_io_stop (struct ev_io *w); |
318 | void ev_io_stop (EV_P_ struct ev_io *w); |
216 | |
319 | |
217 | void ev_timer_start (struct ev_timer *w); |
320 | void ev_timer_start (EV_P_ struct ev_timer *w); |
218 | void ev_timer_stop (struct ev_timer *w); |
321 | 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 */ |
322 | /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
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323 | void ev_timer_again (EV_P_ struct ev_timer *w); |
220 | |
324 | |
221 | void ev_periodic_start (struct ev_periodic *w); |
325 | void ev_periodic_start (EV_P_ struct ev_periodic *w); |
222 | void ev_periodic_stop (struct ev_periodic *w); |
326 | void ev_periodic_stop (EV_P_ struct ev_periodic *w); |
223 | |
327 | |
224 | void ev_signal_start (struct ev_signal *w); |
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225 | void ev_signal_stop (struct ev_signal *w); |
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226 | |
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227 | void ev_idle_start (struct ev_idle *w); |
328 | void ev_idle_start (EV_P_ struct ev_idle *w); |
228 | void ev_idle_stop (struct ev_idle *w); |
329 | void ev_idle_stop (EV_P_ struct ev_idle *w); |
229 | |
330 | |
230 | void ev_prepare_start (struct ev_prepare *w); |
331 | void ev_prepare_start (EV_P_ struct ev_prepare *w); |
231 | void ev_prepare_stop (struct ev_prepare *w); |
332 | void ev_prepare_stop (EV_P_ struct ev_prepare *w); |
232 | |
333 | |
233 | void ev_check_start (struct ev_check *w); |
334 | void ev_check_start (EV_P_ struct ev_check *w); |
234 | void ev_check_stop (struct ev_check *w); |
335 | void ev_check_stop (EV_P_ struct ev_check *w); |
235 | |
336 | |
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337 | /* only supported in the default loop */ |
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338 | void ev_signal_start (EV_P_ struct ev_signal *w); |
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339 | void ev_signal_stop (EV_P_ struct ev_signal *w); |
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340 | |
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341 | /* only supported in the default loop */ |
236 | void ev_child_start (struct ev_child *w); |
342 | void ev_child_start (EV_P_ struct ev_child *w); |
237 | void ev_child_stop (struct ev_child *w); |
343 | void ev_child_stop (EV_P_ struct ev_child *w); |
238 | #endif |
344 | #endif |
239 | |
345 | |
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346 | #ifdef __cplusplus |
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347 | } |
240 | #endif |
348 | #endif |
241 | |
349 | |
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350 | #endif |
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351 | |