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1 | /* |
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2 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions are |
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7 | * met: |
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8 | * |
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9 | * * Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * * Redistributions in binary form must reproduce the above |
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13 | * copyright notice, this list of conditions and the following |
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14 | * disclaimer in the documentation and/or other materials provided |
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15 | * with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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19 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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20 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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21 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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23 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
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29 | |
1 | #ifndef EV_H |
30 | #ifndef EV_H |
2 | #define EV_H |
31 | #define EV_H |
3 | |
32 | |
4 | typedef double ev_tstamp; |
33 | typedef double ev_tstamp; |
5 | |
34 | |
6 | /* eventmask, revents, events... */ |
35 | /* eventmask, revents, events... */ |
7 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
36 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
8 | #define EV_NONE 0x00 |
37 | #define EV_NONE 0x000000 |
9 | #define EV_READ 0x01 |
38 | #define EV_READ 0x000001 |
10 | #define EV_WRITE 0x02 |
39 | #define EV_WRITE 0x000002 |
11 | #define EV_TIMEOUT 0x04 |
40 | #define EV_TIMEOUT 0x000004 |
12 | #define EV_SIGNAL 0x08 |
41 | #define EV_SIGNAL 0x000008 |
13 | #define EV_IDLE 0x10 |
42 | #define EV_IDLE 0x000010 |
14 | #define EV_CHECK 0x20 |
43 | #define EV_CHECK 0x000020 |
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44 | #define EV_PREPARE 0x000040 |
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45 | #define EV_CHILD 0x000080 |
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46 | #define EV_ERROR 0x800000 |
15 | |
47 | |
16 | /* can be used to add custom fields to all watchers */ |
48 | /* can be used to add custom fields to all watchers */ |
17 | #ifndef EV_COMMON |
49 | #ifndef EV_COMMON |
18 | # define EV_COMMON void *data |
50 | # define EV_COMMON void *data |
19 | #endif |
51 | #endif |
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52 | #ifndef EV_PROTOTYPES |
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53 | # define EV_PROTOTYPES 1 |
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54 | #endif |
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55 | |
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56 | #define EV_VERSION_MAJOR 1 |
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57 | #define EV_VERSION_MINOR 1 |
20 | |
58 | |
21 | /* |
59 | /* |
22 | * struct member types: |
60 | * struct member types: |
23 | * private: you can look at them, but not change them, and they might not mean anything to you. |
61 | * private: you can look at them, but not change them, and they might not mean anything to you. |
24 | * ro: can be read anytime, but only changed when the watcher isn't active |
62 | * ro: can be read anytime, but only changed when the watcher isn't active |
… | |
… | |
92 | struct ev_idle |
130 | struct ev_idle |
93 | { |
131 | { |
94 | EV_WATCHER (ev_idle); |
132 | EV_WATCHER (ev_idle); |
95 | }; |
133 | }; |
96 | |
134 | |
97 | /* invoked for each run of the mainloop, just before the next blocking vall is initiated */ |
135 | /* invoked for each run of the mainloop, just before the blocking call */ |
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136 | /* you can still change events in any way you like */ |
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137 | struct ev_prepare |
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138 | { |
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139 | EV_WATCHER (ev_prepare); |
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140 | }; |
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141 | |
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142 | /* invoked for each run of the mainloop, just after the blocking call */ |
98 | struct ev_check |
143 | struct ev_check |
99 | { |
144 | { |
100 | EV_WATCHER (ev_check); |
145 | EV_WATCHER (ev_check); |
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146 | }; |
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147 | |
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148 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
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149 | struct ev_child |
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150 | { |
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151 | EV_WATCHER_LIST (ev_child); |
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152 | |
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153 | int pid; /* ro */ |
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154 | int status; /* rw, holds the exit status, use the macros from sys/wait.h */ |
101 | }; |
155 | }; |
102 | |
156 | |
103 | #define EVMETHOD_NONE 0 |
157 | #define EVMETHOD_NONE 0 |
104 | #define EVMETHOD_SELECT 1 |
158 | #define EVMETHOD_SELECT 1 |
105 | #define EVMETHOD_EPOLL 2 |
159 | #define EVMETHOD_EPOLL 2 |
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160 | #if EV_PROTOTYPES |
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161 | extern int ev_method; |
106 | int ev_init (int flags); /* returns ev_method */ |
162 | int ev_init (int flags); /* returns ev_method */ |
107 | extern int ev_method; |
163 | int ev_version_major (void); |
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164 | int ev_version_minor (void); |
108 | |
165 | |
109 | /* these three calls are suitable for plugging into pthread_atfork */ |
166 | /* these three calls are suitable for plugging into pthread_atfork */ |
110 | void ev_prefork (void); |
167 | void ev_prefork (void); |
111 | void ev_postfork_parent (void); |
168 | void ev_postfork_parent (void); |
112 | void ev_postfork_child (void); |
169 | void ev_postfork_child (void); |
113 | |
170 | |
114 | extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
171 | extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
115 | ev_tstamp ev_time (void); |
172 | ev_tstamp ev_time (void); |
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173 | #endif |
116 | |
174 | |
117 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
175 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
118 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
176 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
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177 | #if EV_PROTOTYPES |
119 | void ev_loop (int flags); |
178 | void ev_loop (int flags); |
120 | extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ |
179 | extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ |
121 | |
180 | |
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181 | /* convinience function, wait for a single event, without registering an event watcher */ |
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182 | /* if timeout is < 0, do wait indefinitely */ |
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183 | void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
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184 | #endif |
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185 | |
122 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
186 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
123 | /* either use evw_init + evXXX_set, or the evXXX_init macro, below, to first initialise a watcher */ |
187 | /* either use evw_init + evXXX_set, or the evXXX_init macro, below, to first initialise a watcher */ |
124 | #define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->cb = (cb_); } while (0) |
188 | #define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0) |
125 | |
189 | |
126 | #define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
190 | #define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
127 | #define evtimer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
191 | #define evtimer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
128 | #define evperiodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
192 | #define evperiodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
129 | #define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
193 | #define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
130 | #define evcheck_set(ev) /* nop, yes this is a serious in-joke */ |
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131 | #define evidle_set(ev) /* nop, yes this is a serious in-joke */ |
194 | #define evidle_set(ev) /* nop, yes, this is a serious in-joke */ |
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195 | #define evprepare_set(ev) /* nop, yes, this is a serious in-joke */ |
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196 | #define evcheck_set(ev) /* nop, yes, this is a serious in-joke */ |
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197 | #define evchild_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) |
132 | |
198 | |
133 | #define evio_init(ev,cb,fd,events) do { evw_init ((ev), (cb)); evio_set ((ev),(fd),(events)); } while (0) |
199 | #define evio_init(ev,cb,fd,events) do { evw_init ((ev), (cb)); evio_set ((ev),(fd),(events)); } while (0) |
134 | #define evtimer_init(ev,cb,after,repeat) do { evw_init ((ev), (cb)); evtimer_set ((ev),(after),(repeat)); } while (0) |
200 | #define evtimer_init(ev,cb,after,repeat) do { evw_init ((ev), (cb)); evtimer_set ((ev),(after),(repeat)); } while (0) |
135 | #define evperiodic_init(ev,cb,at,interval) do { evw_init ((ev), (cb)); evperiodic_set ((ev),(at),(interval)); } while (0) |
201 | #define evperiodic_init(ev,cb,at,interval) do { evw_init ((ev), (cb)); evperiodic_set ((ev),(at),(interval)); } while (0) |
136 | #define evsignal_init(ev,cb,signum) do { evw_init ((ev), (cb)); evsignal_set ((ev), (signum)); } while (0) |
202 | #define evsignal_init(ev,cb,signum) do { evw_init ((ev), (cb)); evsignal_set ((ev), (signum)); } while (0) |
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203 | #define evidle_init(ev,cb) do { evw_init ((ev), (cb)); evidle_set ((ev)); } while (0) |
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204 | #define evprepare_init(ev,cb) do { evw_init ((ev), (cb)); evprepare_set ((ev)); } while (0) |
137 | #define evcheck_init(ev,cb) do { evw_init ((ev), (cb)); evcheck_set ((ev)); } while (0) |
205 | #define evcheck_init(ev,cb) do { evw_init ((ev), (cb)); evcheck_set ((ev)); } while (0) |
138 | #define evidle_init(ev,cb) do { evw_init ((ev), (cb)); evidle_set ((ev)); } while (0) |
206 | #define evchild_init(ev,cb,pid) do { evw_init ((ev), (cb)); evchild_set ((ev),(pid)); } while (0) |
139 | |
207 | |
140 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
208 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
141 | |
209 | |
142 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
210 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
143 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
211 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
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212 | #if EV_PROTOTYPES |
144 | void evio_start (struct ev_io *w); |
213 | void evio_start (struct ev_io *w); |
145 | void evio_stop (struct ev_io *w); |
214 | void evio_stop (struct ev_io *w); |
146 | |
215 | |
147 | void evtimer_start (struct ev_timer *w); |
216 | void evtimer_start (struct ev_timer *w); |
148 | void evtimer_stop (struct ev_timer *w); |
217 | void evtimer_stop (struct ev_timer *w); |
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218 | void evtimer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
149 | |
219 | |
150 | void evperiodic_start (struct ev_periodic *w); |
220 | void evperiodic_start (struct ev_periodic *w); |
151 | void evperiodic_stop (struct ev_periodic *w); |
221 | void evperiodic_stop (struct ev_periodic *w); |
152 | |
222 | |
153 | void evsignal_start (struct ev_signal *w); |
223 | void evsignal_start (struct ev_signal *w); |
154 | void evsignal_stop (struct ev_signal *w); |
224 | void evsignal_stop (struct ev_signal *w); |
155 | |
225 | |
156 | void evidle_start (struct ev_idle *w); |
226 | void evidle_start (struct ev_idle *w); |
157 | void evidle_stop (struct ev_idle *w); |
227 | void evidle_stop (struct ev_idle *w); |
158 | |
228 | |
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229 | void evprepare_start (struct ev_prepare *w); |
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230 | void evprepare_stop (struct ev_prepare *w); |
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231 | |
159 | void evcheck_start (struct ev_check *w); |
232 | void evcheck_start (struct ev_check *w); |
160 | void evcheck_stop (struct ev_check *w); |
233 | void evcheck_stop (struct ev_check *w); |
161 | |
234 | |
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235 | void evchild_start (struct ev_child *w); |
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236 | void evchild_stop (struct ev_child *w); |
162 | #endif |
237 | #endif |
163 | |
238 | |
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239 | #endif |
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240 | |