… | |
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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_TIMEOUT 0x04 |
70 | #define EV_TIMEOUT 0x000100 |
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71 | #define EV_PERIODIC 0x000200 |
41 | #define EV_SIGNAL 0x08 |
72 | #define EV_SIGNAL 0x000400 |
42 | #define EV_IDLE 0x10 |
73 | #define EV_IDLE 0x000800 |
43 | #define EV_CHECK 0x20 |
74 | #define EV_CHECK 0x001000 |
44 | #define EV_ERROR (0x3f|0x80) |
75 | #define EV_PREPARE 0x002000 |
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76 | #define EV_CHILD 0x004000 |
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77 | #define EV_ERROR 0x800000 /* sent when an error occurs */ |
45 | |
78 | |
46 | /* can be used to add custom fields to all watchers */ |
79 | /* can be used to add custom fields to all watchers */ |
47 | #ifndef EV_COMMON |
80 | #ifndef EV_COMMON |
48 | # define EV_COMMON void *data |
81 | # define EV_COMMON void *data |
49 | #endif |
82 | #endif |
50 | #ifndef EV_PROTOTYPES |
83 | #ifndef EV_PROTOTYPES |
51 | # define EV_PROTOTYPES 1 |
84 | # define EV_PROTOTYPES 1 |
52 | #endif |
85 | #endif |
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86 | |
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87 | #define EV_VERSION_MAJOR 1 |
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88 | #define EV_VERSION_MINOR 1 |
53 | |
89 | |
54 | /* |
90 | /* |
55 | * struct member types: |
91 | * struct member types: |
56 | * private: you can look at them, but not change them, and they might not mean anything to you. |
92 | * private: you can look at them, but not change them, and they might not mean anything to you. |
57 | * ro: can be read anytime, but only changed when the watcher isn't active |
93 | * ro: can be read anytime, but only changed when the watcher isn't active |
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60 | |
96 | |
61 | /* shared by all watchers */ |
97 | /* shared by all watchers */ |
62 | #define EV_WATCHER(type) \ |
98 | #define EV_WATCHER(type) \ |
63 | int active; /* private */ \ |
99 | int active; /* private */ \ |
64 | int pending; /* private */ \ |
100 | int pending; /* private */ \ |
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101 | int priority; /* private */ \ |
65 | EV_COMMON; /* rw */ \ |
102 | EV_COMMON; /* rw */ \ |
66 | 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 */ |
67 | |
104 | |
68 | #define EV_WATCHER_LIST(type) \ |
105 | #define EV_WATCHER_LIST(type) \ |
69 | EV_WATCHER (type); \ |
106 | EV_WATCHER (type); \ |
70 | struct type *next /* private */ |
107 | struct ev_watcher_list *next /* private */ |
71 | |
108 | |
72 | #define EV_WATCHER_TIME(type) \ |
109 | #define EV_WATCHER_TIME(type) \ |
73 | EV_WATCHER (type); \ |
110 | EV_WATCHER (type); \ |
74 | ev_tstamp at /* private */ |
111 | ev_tstamp at /* private */ |
75 | |
112 | |
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87 | struct ev_watcher_time { |
124 | struct ev_watcher_time { |
88 | EV_WATCHER_TIME (ev_watcher_time); |
125 | EV_WATCHER_TIME (ev_watcher_time); |
89 | }; |
126 | }; |
90 | |
127 | |
91 | /* 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 */ |
92 | struct ev_timer |
130 | struct ev_timer |
93 | { |
131 | { |
94 | EV_WATCHER_TIME (ev_timer); |
132 | EV_WATCHER_TIME (ev_timer); |
95 | |
133 | |
96 | ev_tstamp repeat; /* rw */ |
134 | ev_tstamp repeat; /* rw */ |
97 | }; |
135 | }; |
98 | |
136 | |
99 | /* 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 */ |
100 | struct ev_periodic |
139 | struct ev_periodic |
101 | { |
140 | { |
102 | EV_WATCHER_TIME (ev_periodic); |
141 | EV_WATCHER_TIME (ev_periodic); |
103 | |
142 | |
104 | ev_tstamp interval; /* rw */ |
143 | ev_tstamp interval; /* rw */ |
105 | }; |
144 | }; |
106 | |
145 | |
107 | /* 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 */ |
108 | struct ev_io |
148 | struct ev_io |
109 | { |
149 | { |
110 | EV_WATCHER_LIST (ev_io); |
150 | EV_WATCHER_LIST (ev_io); |
111 | |
151 | |
112 | int fd; /* ro */ |
152 | int fd; /* ro */ |
113 | int events; /* ro */ |
153 | int events; /* ro */ |
114 | }; |
154 | }; |
115 | |
155 | |
116 | /* 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 */ |
117 | struct ev_signal |
158 | struct ev_signal |
118 | { |
159 | { |
119 | 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 |
120 | |
164 | |
121 | int signum; /* ro */ |
165 | int signum; /* ro */ |
122 | }; |
166 | }; |
123 | |
167 | |
124 | /* 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 */ |
125 | struct ev_idle |
170 | struct ev_idle |
126 | { |
171 | { |
127 | EV_WATCHER (ev_idle); |
172 | EV_WATCHER (ev_idle); |
128 | }; |
173 | }; |
129 | |
174 | |
130 | /* invoked for each run of the mainloop, just before the next blocking vall is initiated */ |
175 | /* invoked for each run of the mainloop, just before the blocking call */ |
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176 | /* you can still change events in any way you like */ |
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177 | /* revent EV_PREPARE */ |
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178 | struct ev_prepare |
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179 | { |
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180 | EV_WATCHER (ev_prepare); |
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181 | }; |
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182 | |
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183 | /* invoked for each run of the mainloop, just after the blocking call */ |
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184 | /* revent EV_CHECK */ |
131 | struct ev_check |
185 | struct ev_check |
132 | { |
186 | { |
133 | EV_WATCHER (ev_check); |
187 | EV_WATCHER (ev_check); |
134 | }; |
188 | }; |
135 | |
189 | |
136 | #define EVMETHOD_NONE 0 |
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 */ |
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193 | struct ev_child |
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194 | { |
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195 | EV_WATCHER_LIST (ev_child); |
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196 | |
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197 | int pid; /* ro */ |
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198 | int rpid; /* rw, holds the received pid */ |
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199 | int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ |
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200 | }; |
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201 | |
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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 */ |
137 | #define EVMETHOD_SELECT 1 |
217 | #define EVMETHOD_SELECT 1 |
138 | #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 | |
139 | #if EV_PROTOTYPES |
226 | #if EV_PROTOTYPES |
140 | extern int ev_method; |
227 | int ev_version_major (void); |
141 | int ev_init (int flags); /* returns ev_method */ |
228 | int ev_version_minor (void); |
142 | |
229 | |
143 | /* these three calls are suitable for plugging into pthread_atfork */ |
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144 | void ev_prefork (void); |
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145 | void ev_postfork_parent (void); |
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146 | void ev_postfork_child (void); |
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147 | |
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148 | extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
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149 | 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); |
150 | #endif |
253 | #endif |
151 | |
254 | |
152 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
255 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
153 | #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 | |
154 | #if EV_PROTOTYPES |
260 | #if EV_PROTOTYPES |
155 | void ev_loop (int flags); |
261 | void ev_loop (EV_P_ int flags); |
156 | 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); |
157 | |
273 | |
158 | /* 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 */ |
159 | /* if timeout is < 0, do wait indefinitely */ |
275 | /* if timeout is < 0, do wait indefinitely */ |
160 | 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); |
161 | #endif |
277 | #endif |
162 | |
278 | |
163 | /* 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 */ |
164 | /* either use evw_init + evXXX_set, or the evXXX_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 */ |
165 | #define evw_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) |
166 | |
287 | |
167 | #define evio_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) |
168 | #define evtimer_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) |
169 | #define evperiodic_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) |
170 | #define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
291 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
171 | #define evcheck_set(ev) /* nop, yes, this is a serious in-joke */ |
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172 | #define evidle_set(ev) /* nop, yes, this is a serious in-joke */ |
292 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
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293 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
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294 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
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295 | #define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) |
173 | |
296 | |
174 | #define evio_init(ev,cb,fd,events) do { evw_init ((ev), (cb)); evio_set ((ev),(fd),(events)); } while (0) |
297 | #define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
175 | #define evtimer_init(ev,cb,after,repeat) do { evw_init ((ev), (cb)); evtimer_set ((ev),(after),(repeat)); } while (0) |
298 | #define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
176 | #define evperiodic_init(ev,cb,at,interval) do { evw_init ((ev), (cb)); evperiodic_set ((ev),(at),(interval)); } while (0) |
299 | #define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0) |
177 | #define evsignal_init(ev,cb,signum) do { evw_init ((ev), (cb)); evsignal_set ((ev), (signum)); } while (0) |
300 | #define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
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301 | #define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
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302 | #define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
178 | #define evcheck_init(ev,cb) do { evw_init ((ev), (cb)); evcheck_set ((ev)); } while (0) |
303 | #define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
179 | #define evidle_init(ev,cb) do { evw_init ((ev), (cb)); evidle_set ((ev)); } while (0) |
304 | #define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) |
180 | |
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 */ |
181 | #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_) |
182 | |
313 | |
183 | /* 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 */ |
184 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
315 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
185 | #if EV_PROTOTYPES |
316 | #if EV_PROTOTYPES |
186 | void evio_start (struct ev_io *w); |
317 | void ev_io_start (EV_P_ struct ev_io *w); |
187 | void evio_stop (struct ev_io *w); |
318 | void ev_io_stop (EV_P_ struct ev_io *w); |
188 | |
319 | |
189 | void evtimer_start (struct ev_timer *w); |
320 | void ev_timer_start (EV_P_ struct ev_timer *w); |
190 | void evtimer_stop (struct ev_timer *w); |
321 | void ev_timer_stop (EV_P_ struct ev_timer *w); |
191 | void evtimer_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); |
192 | |
324 | |
193 | void evperiodic_start (struct ev_periodic *w); |
325 | void ev_periodic_start (EV_P_ struct ev_periodic *w); |
194 | void evperiodic_stop (struct ev_periodic *w); |
326 | void ev_periodic_stop (EV_P_ struct ev_periodic *w); |
195 | |
327 | |
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328 | void ev_idle_start (EV_P_ struct ev_idle *w); |
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329 | void ev_idle_stop (EV_P_ struct ev_idle *w); |
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330 | |
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331 | void ev_prepare_start (EV_P_ struct ev_prepare *w); |
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332 | void ev_prepare_stop (EV_P_ struct ev_prepare *w); |
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333 | |
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334 | void ev_check_start (EV_P_ struct ev_check *w); |
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335 | void ev_check_stop (EV_P_ struct ev_check *w); |
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336 | |
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337 | /* only supported in the default loop */ |
196 | void evsignal_start (struct ev_signal *w); |
338 | void ev_signal_start (EV_P_ struct ev_signal *w); |
197 | void evsignal_stop (struct ev_signal *w); |
339 | void ev_signal_stop (EV_P_ struct ev_signal *w); |
198 | |
340 | |
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341 | /* only supported in the default loop */ |
199 | void evidle_start (struct ev_idle *w); |
342 | void ev_child_start (EV_P_ struct ev_child *w); |
200 | void evidle_stop (struct ev_idle *w); |
343 | void ev_child_stop (EV_P_ struct ev_child *w); |
201 | |
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202 | void evcheck_start (struct ev_check *w); |
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203 | void evcheck_stop (struct ev_check *w); |
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204 | #endif |
344 | #endif |
205 | |
345 | |
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346 | #ifdef __cplusplus |
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347 | } |
206 | #endif |
348 | #endif |
207 | |
349 | |
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350 | #endif |
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351 | |