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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 | |
35 | /* eventmask, revents, events... */ |
47 | /* eventmask, revents, events... */ |
36 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
48 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
37 | #define EV_NONE 0x00 |
49 | #define EV_NONE 0x00 |
38 | #define EV_READ 0x01 |
50 | #define EV_READ 0x01 |
39 | #define EV_WRITE 0x02 |
51 | #define EV_WRITE 0x02 |
40 | #define EV_TIMEOUT 0x04 |
52 | #define EV_TIMEOUT 0x000100 |
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53 | #define EV_PERIODIC 0x000200 |
41 | #define EV_SIGNAL 0x08 |
54 | #define EV_SIGNAL 0x000400 |
42 | #define EV_IDLE 0x10 |
55 | #define EV_IDLE 0x000800 |
43 | #define EV_CHECK 0x20 |
56 | #define EV_CHECK 0x001000 |
44 | #define EV_PREPARE 0x40 |
57 | #define EV_PREPARE 0x002000 |
45 | #define EV_CHILD 0x80 |
58 | #define EV_CHILD 0x004000 |
46 | #define EV_ERROR (0xff|0x8000) |
59 | #define EV_ERROR 0x800000 /* sent when an error occurs */ |
47 | |
60 | |
48 | /* can be used to add custom fields to all watchers */ |
61 | /* can be used to add custom fields to all watchers */ |
49 | #ifndef EV_COMMON |
62 | #ifndef EV_COMMON |
50 | # define EV_COMMON void *data |
63 | # define EV_COMMON void *data |
51 | #endif |
64 | #endif |
52 | #ifndef EV_PROTOTYPES |
65 | #ifndef EV_PROTOTYPES |
53 | # define EV_PROTOTYPES 1 |
66 | # define EV_PROTOTYPES 1 |
54 | #endif |
67 | #endif |
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68 | |
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69 | #define EV_VERSION_MAJOR 1 |
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70 | #define EV_VERSION_MINOR 1 |
55 | |
71 | |
56 | /* |
72 | /* |
57 | * struct member types: |
73 | * struct member types: |
58 | * private: you can look at them, but not change them, and they might not mean anything to you. |
74 | * private: you can look at them, but not change them, and they might not mean anything to you. |
59 | * ro: can be read anytime, but only changed when the watcher isn't active |
75 | * ro: can be read anytime, but only changed when the watcher isn't active |
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62 | |
78 | |
63 | /* shared by all watchers */ |
79 | /* shared by all watchers */ |
64 | #define EV_WATCHER(type) \ |
80 | #define EV_WATCHER(type) \ |
65 | int active; /* private */ \ |
81 | int active; /* private */ \ |
66 | int pending; /* private */ \ |
82 | int pending; /* private */ \ |
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83 | int priority; /* ro */ \ |
67 | EV_COMMON; /* rw */ \ |
84 | EV_COMMON; /* rw */ \ |
68 | void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ |
85 | void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ |
69 | |
86 | |
70 | #define EV_WATCHER_LIST(type) \ |
87 | #define EV_WATCHER_LIST(type) \ |
71 | EV_WATCHER (type); \ |
88 | EV_WATCHER (type); \ |
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89 | struct ev_watcher_time { |
106 | struct ev_watcher_time { |
90 | EV_WATCHER_TIME (ev_watcher_time); |
107 | EV_WATCHER_TIME (ev_watcher_time); |
91 | }; |
108 | }; |
92 | |
109 | |
93 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
110 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
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111 | /* revent EV_TIMEOUT */ |
94 | struct ev_timer |
112 | struct ev_timer |
95 | { |
113 | { |
96 | EV_WATCHER_TIME (ev_timer); |
114 | EV_WATCHER_TIME (ev_timer); |
97 | |
115 | |
98 | ev_tstamp repeat; /* rw */ |
116 | ev_tstamp repeat; /* rw */ |
99 | }; |
117 | }; |
100 | |
118 | |
101 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
119 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
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120 | /* revent EV_PERIODIC */ |
102 | struct ev_periodic |
121 | struct ev_periodic |
103 | { |
122 | { |
104 | EV_WATCHER_TIME (ev_periodic); |
123 | EV_WATCHER_TIME (ev_periodic); |
105 | |
124 | |
106 | ev_tstamp interval; /* rw */ |
125 | ev_tstamp interval; /* rw */ |
107 | }; |
126 | }; |
108 | |
127 | |
109 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
128 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
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129 | /* revent EV_READ, EV_WRITE */ |
110 | struct ev_io |
130 | struct ev_io |
111 | { |
131 | { |
112 | EV_WATCHER_LIST (ev_io); |
132 | EV_WATCHER_LIST (ev_io); |
113 | |
133 | |
114 | int fd; /* ro */ |
134 | int fd; /* ro */ |
115 | int events; /* ro */ |
135 | int events; /* ro */ |
116 | }; |
136 | }; |
117 | |
137 | |
118 | /* invoked when the given signal has been received */ |
138 | /* invoked when the given signal has been received */ |
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139 | /* revent EV_SIGNAL */ |
119 | struct ev_signal |
140 | struct ev_signal |
120 | { |
141 | { |
121 | EV_WATCHER_LIST (ev_signal); |
142 | EV_WATCHER_LIST (ev_signal); |
122 | |
143 | |
123 | int signum; /* ro */ |
144 | int signum; /* ro */ |
124 | }; |
145 | }; |
125 | |
146 | |
126 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
147 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
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148 | /* revent EV_IDLE */ |
127 | struct ev_idle |
149 | struct ev_idle |
128 | { |
150 | { |
129 | EV_WATCHER (ev_idle); |
151 | EV_WATCHER (ev_idle); |
130 | }; |
152 | }; |
131 | |
153 | |
132 | /* invoked for each run of the mainloop, just before the blocking call */ |
154 | /* invoked for each run of the mainloop, just before the blocking call */ |
133 | /* you can still change events in any way you like */ |
155 | /* you can still change events in any way you like */ |
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156 | /* revent EV_PREPARE */ |
134 | struct ev_prepare |
157 | struct ev_prepare |
135 | { |
158 | { |
136 | EV_WATCHER (ev_prepare); |
159 | EV_WATCHER (ev_prepare); |
137 | }; |
160 | }; |
138 | |
161 | |
139 | /* invoked for each run of the mainloop, just after the blocking call */ |
162 | /* invoked for each run of the mainloop, just after the blocking call */ |
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163 | /* revent EV_CHECK */ |
140 | struct ev_check |
164 | struct ev_check |
141 | { |
165 | { |
142 | EV_WATCHER (ev_check); |
166 | EV_WATCHER (ev_check); |
143 | }; |
167 | }; |
144 | |
168 | |
145 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
169 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
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170 | /* revent EV_CHILD */ |
146 | struct ev_child |
171 | struct ev_child |
147 | { |
172 | { |
148 | EV_WATCHER_LIST (ev_child); |
173 | EV_WATCHER_LIST (ev_child); |
149 | |
174 | |
150 | int pid; /* ro */ |
175 | int pid; /* ro */ |
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176 | int rpid; /* rw, holds the received pid */ |
151 | int status; /* holds the exit status, use the macros from sys/wait.h */ |
177 | int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ |
152 | }; |
178 | }; |
153 | |
179 | |
154 | #define EVMETHOD_NONE 0 |
180 | #define EVMETHOD_AUTO 0 /* consults environment */ |
155 | #define EVMETHOD_SELECT 1 |
181 | #define EVMETHOD_SELECT 1 |
156 | #define EVMETHOD_EPOLL 2 |
182 | #define EVMETHOD_POLL 2 |
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183 | #define EVMETHOD_EPOLL 4 |
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184 | #define EVMETHOD_KQUEUE 8 |
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185 | #define EVMETHOD_DEVPOLL 16 /* NYI */ |
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186 | #define EVMETHOD_PORT 32 /* NYI */ |
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187 | #define EVMETHOD_ANY ~0 /* any method, do not consult env */ |
157 | #if EV_PROTOTYPES |
188 | #if EV_PROTOTYPES |
158 | extern int ev_method; |
189 | extern int ev_method; |
159 | int ev_init (int flags); /* returns ev_method */ |
190 | int ev_init (int methods); /* returns ev_method */ |
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191 | int ev_version_major (void); |
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192 | int ev_version_minor (void); |
160 | |
193 | |
161 | /* these three calls are suitable for plugging into pthread_atfork */ |
194 | /* these three calls are suitable for plugging into pthread_atfork */ |
162 | void ev_prefork (void); |
195 | void ev_fork_prepare (void); |
163 | void ev_postfork_parent (void); |
196 | void ev_fork_parent (void); |
164 | void ev_postfork_child (void); |
197 | void ev_fork_child (void); |
165 | |
198 | |
166 | extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
199 | extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
167 | ev_tstamp ev_time (void); |
200 | ev_tstamp ev_time (void); |
168 | #endif |
201 | #endif |
169 | |
202 | |
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177 | /* if timeout is < 0, do wait indefinitely */ |
210 | /* if timeout is < 0, do wait indefinitely */ |
178 | void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
211 | void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
179 | #endif |
212 | #endif |
180 | |
213 | |
181 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
214 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
182 | /* either use evw_init + evXXX_set, or the evXXX_init macro, below, to first initialise a watcher */ |
215 | /* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
183 | #define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0) |
216 | #define ev_watcher_init(ev,cb_) do { (ev)->active = (ev)->pending = (ev)->priority = 0; (ev)->cb = (cb_); } while (0) |
184 | |
217 | |
185 | #define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
218 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
186 | #define evtimer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
219 | #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
187 | #define evperiodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
220 | #define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
188 | #define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
221 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
189 | #define evidle_set(ev) /* nop, yes, this is a serious in-joke */ |
222 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
190 | #define evprepare_set(ev) /* nop, yes, this is a serious in-joke */ |
223 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
191 | #define evcheck_set(ev) /* nop, yes, this is a serious in-joke */ |
224 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
192 | #define evchild_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) |
225 | #define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) |
193 | |
226 | |
194 | #define evio_init(ev,cb,fd,events) do { evw_init ((ev), (cb)); evio_set ((ev),(fd),(events)); } while (0) |
227 | #define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
195 | #define evtimer_init(ev,cb,after,repeat) do { evw_init ((ev), (cb)); evtimer_set ((ev),(after),(repeat)); } while (0) |
228 | #define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
196 | #define evperiodic_init(ev,cb,at,interval) do { evw_init ((ev), (cb)); evperiodic_set ((ev),(at),(interval)); } while (0) |
229 | #define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0) |
197 | #define evsignal_init(ev,cb,signum) do { evw_init ((ev), (cb)); evsignal_set ((ev), (signum)); } while (0) |
230 | #define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
198 | #define evidle_init(ev,cb) do { evw_init ((ev), (cb)); evidle_set ((ev)); } while (0) |
231 | #define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
199 | #define evprepare_init(ev,cb) do { evw_init ((ev), (cb)); evprepare_set ((ev)); } while (0) |
232 | #define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
200 | #define evcheck_init(ev,cb) do { evw_init ((ev), (cb)); evcheck_set ((ev)); } while (0) |
233 | #define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
201 | #define evchild_init(ev,cb,pid) do { evw_init ((ev), (cb)); evchild_set ((ev),(pid)); } while (0) |
234 | #define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) |
202 | |
235 | |
203 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
236 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
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237 | #define ev_set_priority(ev,pri) (ev)->priority = pri |
204 | |
238 | |
205 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
239 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
206 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
240 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
207 | #if EV_PROTOTYPES |
241 | #if EV_PROTOTYPES |
208 | void evio_start (struct ev_io *w); |
242 | void ev_io_start (struct ev_io *w); |
209 | void evio_stop (struct ev_io *w); |
243 | void ev_io_stop (struct ev_io *w); |
210 | |
244 | |
211 | void evtimer_start (struct ev_timer *w); |
245 | void ev_timer_start (struct ev_timer *w); |
212 | void evtimer_stop (struct ev_timer *w); |
246 | void ev_timer_stop (struct ev_timer *w); |
213 | void evtimer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
247 | void ev_timer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
214 | |
248 | |
215 | void evperiodic_start (struct ev_periodic *w); |
249 | void ev_periodic_start (struct ev_periodic *w); |
216 | void evperiodic_stop (struct ev_periodic *w); |
250 | void ev_periodic_stop (struct ev_periodic *w); |
217 | |
251 | |
218 | void evsignal_start (struct ev_signal *w); |
252 | void ev_signal_start (struct ev_signal *w); |
219 | void evsignal_stop (struct ev_signal *w); |
253 | void ev_signal_stop (struct ev_signal *w); |
220 | |
254 | |
221 | void evidle_start (struct ev_idle *w); |
255 | void ev_idle_start (struct ev_idle *w); |
222 | void evidle_stop (struct ev_idle *w); |
256 | void ev_idle_stop (struct ev_idle *w); |
223 | |
257 | |
224 | void evprepare_start (struct ev_prepare *w); |
258 | void ev_prepare_start (struct ev_prepare *w); |
225 | void evprepare_stop (struct ev_prepare *w); |
259 | void ev_prepare_stop (struct ev_prepare *w); |
226 | |
260 | |
227 | void evcheck_start (struct ev_check *w); |
261 | void ev_check_start (struct ev_check *w); |
228 | void evcheck_stop (struct ev_check *w); |
262 | void ev_check_stop (struct ev_check *w); |
229 | |
263 | |
230 | void evchild_start (struct ev_child *w); |
264 | void ev_child_start (struct ev_child *w); |
231 | void evchild_stop (struct ev_child *w); |
265 | void ev_child_stop (struct ev_child *w); |
232 | #endif |
266 | #endif |
233 | |
267 | |
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268 | #ifdef __cplusplus |
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269 | } |
234 | #endif |
270 | #endif |
235 | |
271 | |
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272 | #endif |
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273 | |