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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 0x00 |
9 | #define EV_READ 0x01 |
38 | #define EV_READ 0x01 |
10 | #define EV_WRITE 0x02 |
39 | #define EV_WRITE 0x02 |
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40 | #define EV_REIFY 0x04 /* private */ |
11 | #define EV_TIMEOUT 0x04 |
41 | #define EV_TIMEOUT 0x000100 |
12 | #define EV_SIGNAL 0x08 |
42 | #define EV_SIGNAL 0x000200 |
13 | #define EV_IDLE 0x10 |
43 | #define EV_IDLE 0x000400 |
14 | #define EV_CHECK 0x20 |
44 | #define EV_CHECK 0x000800 |
15 | #define EV_ERROR (0x3f|0x80) |
45 | #define EV_PREPARE 0x001000 |
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46 | #define EV_CHILD 0x002000 |
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47 | #define EV_ERROR 0x800000 /* sent when an error occurs */ |
16 | |
48 | |
17 | /* can be used to add custom fields to all watchers */ |
49 | /* can be used to add custom fields to all watchers */ |
18 | #ifndef EV_COMMON |
50 | #ifndef EV_COMMON |
19 | # define EV_COMMON void *data |
51 | # define EV_COMMON void *data |
20 | #endif |
52 | #endif |
21 | #ifndef EV_PROTOTYPES |
53 | #ifndef EV_PROTOTYPES |
22 | # define EV_PROTOTYPES 1 |
54 | # define EV_PROTOTYPES 1 |
23 | #endif |
55 | #endif |
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56 | |
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57 | #define EV_VERSION_MAJOR 1 |
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58 | #define EV_VERSION_MINOR 1 |
24 | |
59 | |
25 | /* |
60 | /* |
26 | * struct member types: |
61 | * struct member types: |
27 | * private: you can look at them, but not change them, and they might not mean anything to you. |
62 | * private: you can look at them, but not change them, and they might not mean anything to you. |
28 | * ro: can be read anytime, but only changed when the watcher isn't active |
63 | * ro: can be read anytime, but only changed when the watcher isn't active |
… | |
… | |
96 | struct ev_idle |
131 | struct ev_idle |
97 | { |
132 | { |
98 | EV_WATCHER (ev_idle); |
133 | EV_WATCHER (ev_idle); |
99 | }; |
134 | }; |
100 | |
135 | |
101 | /* invoked for each run of the mainloop, just before the next blocking vall is initiated */ |
136 | /* invoked for each run of the mainloop, just before the blocking call */ |
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137 | /* you can still change events in any way you like */ |
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138 | struct ev_prepare |
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139 | { |
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140 | EV_WATCHER (ev_prepare); |
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141 | }; |
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142 | |
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143 | /* invoked for each run of the mainloop, just after the blocking call */ |
102 | struct ev_check |
144 | struct ev_check |
103 | { |
145 | { |
104 | EV_WATCHER (ev_check); |
146 | EV_WATCHER (ev_check); |
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147 | }; |
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148 | |
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149 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
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150 | struct ev_child |
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151 | { |
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152 | EV_WATCHER_LIST (ev_child); |
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153 | |
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154 | int pid; /* ro */ |
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155 | int status; /* rw, holds the exit status, use the macros from sys/wait.h */ |
105 | }; |
156 | }; |
106 | |
157 | |
107 | #define EVMETHOD_NONE 0 |
158 | #define EVMETHOD_NONE 0 |
108 | #define EVMETHOD_SELECT 1 |
159 | #define EVMETHOD_SELECT 1 |
109 | #define EVMETHOD_EPOLL 2 |
160 | #define EVMETHOD_EPOLL 2 |
110 | #if EV_PROTOTYPES |
161 | #if EV_PROTOTYPES |
111 | extern int ev_method; |
162 | extern int ev_method; |
112 | int ev_init (int flags); /* returns ev_method */ |
163 | int ev_init (int flags); /* returns ev_method */ |
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164 | int ev_version_major (void); |
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165 | int ev_version_minor (void); |
113 | |
166 | |
114 | /* these three calls are suitable for plugging into pthread_atfork */ |
167 | /* these three calls are suitable for plugging into pthread_atfork */ |
115 | void ev_prefork (void); |
168 | void ev_prefork (void); |
116 | void ev_postfork_parent (void); |
169 | void ev_postfork_parent (void); |
117 | void ev_postfork_child (void); |
170 | void ev_postfork_child (void); |
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130 | /* if timeout is < 0, do wait indefinitely */ |
183 | /* if timeout is < 0, do wait indefinitely */ |
131 | void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
184 | void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
132 | #endif |
185 | #endif |
133 | |
186 | |
134 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
187 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
135 | /* either use evw_init + evXXX_set, or the evXXX_init macro, below, to first initialise a watcher */ |
188 | /* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
136 | #define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0) |
189 | #define ev_watcher_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0) |
137 | |
190 | |
138 | #define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
191 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
139 | #define evtimer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
192 | #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
140 | #define evperiodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
193 | #define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
141 | #define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
194 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
142 | #define evcheck_set(ev) /* nop, yes, this is a serious in-joke */ |
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143 | #define evidle_set(ev) /* nop, yes, this is a serious in-joke */ |
195 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
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196 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
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197 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
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198 | #define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) |
144 | |
199 | |
145 | #define evio_init(ev,cb,fd,events) do { evw_init ((ev), (cb)); evio_set ((ev),(fd),(events)); } while (0) |
200 | #define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
146 | #define evtimer_init(ev,cb,after,repeat) do { evw_init ((ev), (cb)); evtimer_set ((ev),(after),(repeat)); } while (0) |
201 | #define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
147 | #define evperiodic_init(ev,cb,at,interval) do { evw_init ((ev), (cb)); evperiodic_set ((ev),(at),(interval)); } while (0) |
202 | #define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0) |
148 | #define evsignal_init(ev,cb,signum) do { evw_init ((ev), (cb)); evsignal_set ((ev), (signum)); } while (0) |
203 | #define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (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) |
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205 | #define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
149 | #define evcheck_init(ev,cb) do { evw_init ((ev), (cb)); evcheck_set ((ev)); } while (0) |
206 | #define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
150 | #define evidle_init(ev,cb) do { evw_init ((ev), (cb)); evidle_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) |
151 | |
208 | |
152 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
209 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
153 | |
210 | |
154 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
211 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
155 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
212 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
156 | #if EV_PROTOTYPES |
213 | #if EV_PROTOTYPES |
157 | void evio_start (struct ev_io *w); |
214 | void ev_io_start (struct ev_io *w); |
158 | void evio_stop (struct ev_io *w); |
215 | void ev_io_stop (struct ev_io *w); |
159 | |
216 | |
160 | void evtimer_start (struct ev_timer *w); |
217 | void ev_timer_start (struct ev_timer *w); |
161 | void evtimer_stop (struct ev_timer *w); |
218 | void ev_timer_stop (struct ev_timer *w); |
162 | void evtimer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
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 */ |
163 | |
220 | |
164 | void evperiodic_start (struct ev_periodic *w); |
221 | void ev_periodic_start (struct ev_periodic *w); |
165 | void evperiodic_stop (struct ev_periodic *w); |
222 | void ev_periodic_stop (struct ev_periodic *w); |
166 | |
223 | |
167 | void evsignal_start (struct ev_signal *w); |
224 | void ev_signal_start (struct ev_signal *w); |
168 | void evsignal_stop (struct ev_signal *w); |
225 | void ev_signal_stop (struct ev_signal *w); |
169 | |
226 | |
170 | void evidle_start (struct ev_idle *w); |
227 | void ev_idle_start (struct ev_idle *w); |
171 | void evidle_stop (struct ev_idle *w); |
228 | void ev_idle_stop (struct ev_idle *w); |
172 | |
229 | |
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230 | void ev_prepare_start (struct ev_prepare *w); |
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231 | void ev_prepare_stop (struct ev_prepare *w); |
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232 | |
173 | void evcheck_start (struct ev_check *w); |
233 | void ev_check_start (struct ev_check *w); |
174 | void evcheck_stop (struct ev_check *w); |
234 | void ev_check_stop (struct ev_check *w); |
175 | #endif |
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176 | |
235 | |
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236 | void ev_child_start (struct ev_child *w); |
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237 | void ev_child_stop (struct ev_child *w); |
177 | #endif |
238 | #endif |
178 | |
239 | |
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240 | #endif |
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241 | |