1 | /* |
1 | /* |
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2 | * libev native API header |
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3 | * |
2 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> |
3 | * All rights reserved. |
5 | * All rights reserved. |
4 | * |
6 | * |
5 | * Redistribution and use in source and binary forms, with or without |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
6 | * modification, are permitted provided that the following conditions are |
8 | * tion, are permitted provided that the following conditions are met: |
7 | * met: |
9 | * |
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10 | * 1. Redistributions of source code must retain the above copyright notice, |
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11 | * this list of conditions and the following disclaimer. |
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12 | * |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
8 | * |
27 | * |
9 | * * Redistributions of source code must retain the above copyright |
28 | * Alternatively, the contents of this file may be used under the terms of |
10 | * notice, this list of conditions and the following disclaimer. |
29 | * the GNU General Public License ("GPL") version 2 or any later version, |
11 | * |
30 | * in which case the provisions of the GPL are applicable instead of |
12 | * * Redistributions in binary form must reproduce the above |
31 | * the above. If you wish to allow the use of your version of this file |
13 | * copyright notice, this list of conditions and the following |
32 | * only under the terms of the GPL and not to allow others to use your |
14 | * disclaimer in the documentation and/or other materials provided |
33 | * version of this file under the BSD license, indicate your decision |
15 | * with the distribution. |
34 | * by deleting the provisions above and replace them with the notice |
16 | * |
35 | * and other provisions required by the GPL. If you do not delete the |
17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
36 | * provisions above, a recipient may use your version of this file under |
18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
37 | * either the BSD or the GPL. |
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 | */ |
38 | */ |
29 | |
39 | |
30 | #ifndef EV_H__ |
40 | #ifndef EV_H__ |
31 | #define EV_H__ |
41 | #define EV_H__ |
32 | |
42 | |
… | |
… | |
54 | |
64 | |
55 | #ifndef EV_STAT_ENABLE |
65 | #ifndef EV_STAT_ENABLE |
56 | # define EV_STAT_ENABLE 1 |
66 | # define EV_STAT_ENABLE 1 |
57 | #endif |
67 | #endif |
58 | |
68 | |
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69 | #ifndef EV_IDLE_ENABLE |
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70 | # define EV_IDLE_ENABLE 1 |
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71 | #endif |
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72 | |
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73 | #ifndef EV_FORK_ENABLE |
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74 | # define EV_FORK_ENABLE 1 |
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75 | #endif |
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76 | |
59 | #ifndef EV_EMBED_ENABLE |
77 | #ifndef EV_EMBED_ENABLE |
60 | # define EV_EMBED_ENABLE 1 |
78 | # define EV_EMBED_ENABLE 1 |
61 | #endif |
79 | #endif |
62 | |
80 | |
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81 | #ifndef EV_ASYNC_ENABLE |
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82 | # define EV_ASYNC_ENABLE 1 |
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83 | #endif |
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84 | |
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85 | #ifndef EV_ATOMIC_T |
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86 | # include <signal.h> |
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87 | # define EV_ATOMIC_T sig_atomic_t volatile |
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88 | #endif |
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89 | |
63 | /*****************************************************************************/ |
90 | /*****************************************************************************/ |
64 | |
91 | |
65 | #if EV_STAT_ENABLE |
92 | #if EV_STAT_ENABLE |
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93 | # ifdef _WIN32 |
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94 | # include <time.h> |
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95 | # include <sys/types.h> |
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96 | # endif |
66 | # include <sys/stat.h> |
97 | # include <sys/stat.h> |
67 | #endif |
98 | #endif |
68 | |
99 | |
69 | /* support multiple event loops? */ |
100 | /* support multiple event loops? */ |
70 | #if EV_MULTIPLICITY |
101 | #if EV_MULTIPLICITY |
71 | struct ev_loop; |
102 | struct ev_loop; |
72 | # define EV_P struct ev_loop *loop |
103 | # define EV_P struct ev_loop *loop |
73 | # define EV_P_ EV_P, |
104 | # define EV_P_ EV_P, |
74 | # define EV_A loop |
105 | # define EV_A loop |
75 | # define EV_A_ EV_A, |
106 | # define EV_A_ EV_A, |
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107 | # define EV_DEFAULT_UC ev_default_loop_uc () |
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108 | # define EV_DEFAULT_UC_ EV_DEFAULT_UC, |
76 | # define EV_DEFAULT_A ev_default_loop (0) |
109 | # define EV_DEFAULT ev_default_loop (0) |
77 | # define EV_DEFAULT_A_ EV_DEFAULT_A, |
110 | # define EV_DEFAULT_ EV_DEFAULT, |
78 | #else |
111 | #else |
79 | # define EV_P void |
112 | # define EV_P void |
80 | # define EV_P_ |
113 | # define EV_P_ |
81 | # define EV_A |
114 | # define EV_A |
82 | # define EV_A_ |
115 | # define EV_A_ |
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116 | # define EV_DEFAULT |
83 | # define EV_DEFAULT_A |
117 | # define EV_DEFAULT_ |
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118 | # define EV_DEFAULT_UC |
84 | # define EV_DEFAULT_A_ |
119 | # define EV_DEFAULT_UC_ |
85 | |
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86 | # undef EV_EMBED_ENABLE |
120 | # undef EV_EMBED_ENABLE |
87 | #endif |
121 | #endif |
88 | |
122 | |
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123 | #if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3 |
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124 | # define EV_INLINE static inline |
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125 | #else |
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126 | # define EV_INLINE static |
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127 | #endif |
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128 | |
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129 | /*****************************************************************************/ |
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130 | |
89 | /* eventmask, revents, events... */ |
131 | /* eventmask, revents, events... */ |
90 | #define EV_UNDEF -1L /* guaranteed to be invalid */ |
132 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
91 | #define EV_NONE 0x00L /* no events */ |
133 | #define EV_NONE 0x00 /* no events */ |
92 | #define EV_READ 0x01L /* ev_io detected read will not block */ |
134 | #define EV_READ 0x01 /* ev_io detected read will not block */ |
93 | #define EV_WRITE 0x02L /* ev_io detected write will not block */ |
135 | #define EV_WRITE 0x02 /* ev_io detected write will not block */ |
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136 | #define EV_IOFDSET 0x80 /* internal use only */ |
94 | #define EV_TIMEOUT 0x00000100L /* timer timed out */ |
137 | #define EV_TIMEOUT 0x00000100 /* timer timed out */ |
95 | #define EV_PERIODIC 0x00000200L /* periodic timer timed out */ |
138 | #define EV_PERIODIC 0x00000200 /* periodic timer timed out */ |
96 | #define EV_SIGNAL 0x00000400L /* signal was received */ |
139 | #define EV_SIGNAL 0x00000400 /* signal was received */ |
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140 | #define EV_CHILD 0x00000800 /* child/pid had status change */ |
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141 | #define EV_STAT 0x00001000 /* stat data changed */ |
97 | #define EV_IDLE 0x00000800L /* event loop is idling */ |
142 | #define EV_IDLE 0x00002000 /* event loop is idling */ |
98 | #define EV_PREPARE 0x00001000L /* event loop about to poll */ |
143 | #define EV_PREPARE 0x00004000 /* event loop about to poll */ |
99 | #define EV_CHECK 0x00002000L /* event loop finished poll */ |
144 | #define EV_CHECK 0x00008000 /* event loop finished poll */ |
100 | #define EV_CHILD 0x00004000L /* child/pid had status change */ |
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101 | #define EV_EMBED 0x00008000L /* embedded event loop needs sweep */ |
145 | #define EV_EMBED 0x00010000 /* embedded event loop needs sweep */ |
102 | #define EV_STAT 0x00010000L /* stat data changed */ |
146 | #define EV_FORK 0x00020000 /* event loop resumed in child */ |
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147 | #define EV_ASYNC 0x00040000 /* async intra-loop signal */ |
103 | #define EV_ERROR 0x80000000L /* sent when an error occurs */ |
148 | #define EV_ERROR 0x80000000 /* sent when an error occurs */ |
104 | |
149 | |
105 | /* can be used to add custom fields to all watchers, while losing binary compatibility */ |
150 | /* can be used to add custom fields to all watchers, while losing binary compatibility */ |
106 | #ifndef EV_COMMON |
151 | #ifndef EV_COMMON |
107 | # define EV_COMMON void *data; |
152 | # define EV_COMMON void *data; |
108 | #endif |
153 | #endif |
109 | #ifndef EV_PROTOTYPES |
154 | #ifndef EV_PROTOTYPES |
110 | # define EV_PROTOTYPES 1 |
155 | # define EV_PROTOTYPES 1 |
111 | #endif |
156 | #endif |
112 | |
157 | |
113 | #define EV_VERSION_MAJOR 1 |
158 | #define EV_VERSION_MAJOR 3 |
114 | #define EV_VERSION_MINOR 1 |
159 | #define EV_VERSION_MINOR 0 |
115 | |
160 | |
116 | #ifndef EV_CB_DECLARE |
161 | #ifndef EV_CB_DECLARE |
117 | # define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents); |
162 | # define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents); |
118 | #endif |
163 | #endif |
119 | #ifndef EV_CB_INVOKE |
164 | #ifndef EV_CB_INVOKE |
… | |
… | |
123 | /* |
168 | /* |
124 | * struct member types: |
169 | * struct member types: |
125 | * private: you can look at them, but not change them, and they might not mean anything to you. |
170 | * private: you can look at them, but not change them, and they might not mean anything to you. |
126 | * ro: can be read anytime, but only changed when the watcher isn't active |
171 | * ro: can be read anytime, but only changed when the watcher isn't active |
127 | * rw: can be read and modified anytime, even when the watcher is active |
172 | * rw: can be read and modified anytime, even when the watcher is active |
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173 | * |
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174 | * some internal details that might be helpful for debugging: |
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175 | * |
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176 | * active is either 0, which means the watcher is not active, |
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177 | * or the array index of the watcher (periodics, timers) |
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178 | * or the array index + 1 (most other watchers) |
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179 | * or simply 1 for watchers that aren't in some array. |
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180 | * pending is either 0, in which case the watcher isn't, |
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181 | * or the array index + 1 in the pendings array. |
128 | */ |
182 | */ |
129 | |
183 | |
130 | /* shared by all watchers */ |
184 | /* shared by all watchers */ |
131 | #define EV_WATCHER(type) \ |
185 | #define EV_WATCHER(type) \ |
132 | int active; /* private */ \ |
186 | int active; /* private */ \ |
… | |
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184 | /* revent EV_PERIODIC */ |
238 | /* revent EV_PERIODIC */ |
185 | typedef struct ev_periodic |
239 | typedef struct ev_periodic |
186 | { |
240 | { |
187 | EV_WATCHER_TIME (ev_periodic) |
241 | EV_WATCHER_TIME (ev_periodic) |
188 | |
242 | |
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243 | ev_tstamp offset; /* rw */ |
189 | ev_tstamp interval; /* rw */ |
244 | ev_tstamp interval; /* rw */ |
190 | ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */ |
245 | ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */ |
191 | } ev_periodic; |
246 | } ev_periodic; |
192 | |
247 | |
193 | /* invoked when the given signal has been received */ |
248 | /* invoked when the given signal has been received */ |
… | |
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204 | /* does not support priorities */ |
259 | /* does not support priorities */ |
205 | typedef struct ev_child |
260 | typedef struct ev_child |
206 | { |
261 | { |
207 | EV_WATCHER_LIST (ev_child) |
262 | EV_WATCHER_LIST (ev_child) |
208 | |
263 | |
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264 | int flags; /* private */ |
209 | int pid; /* ro */ |
265 | int pid; /* ro */ |
210 | int rpid; /* rw, holds the received pid */ |
266 | int rpid; /* rw, holds the received pid */ |
211 | int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ |
267 | int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ |
212 | } ev_child; |
268 | } ev_child; |
213 | |
269 | |
214 | #if EV_STAT_ENABLE |
270 | #if EV_STAT_ENABLE |
215 | /* st_nlink = 0 means missing file or other error */ |
271 | /* st_nlink = 0 means missing file or other error */ |
216 | #ifdef _WIN32 |
272 | # ifdef _WIN32 |
217 | typedef struct _stati64 ev_statdata; |
273 | typedef struct _stati64 ev_statdata; |
218 | #else |
274 | # else |
219 | typedef struct stat ev_statdata; |
275 | typedef struct stat ev_statdata; |
220 | #endif |
276 | # endif |
221 | |
277 | |
222 | /* invoked each time the stat data changes for a given path */ |
278 | /* invoked each time the stat data changes for a given path */ |
223 | /* revent EV_STAT */ |
279 | /* revent EV_STAT */ |
224 | typedef struct ev_stat |
280 | typedef struct ev_stat |
225 | { |
281 | { |
226 | EV_WATCHER (ev_stat) |
282 | EV_WATCHER_LIST (ev_stat) |
227 | |
283 | |
228 | ev_timer timer; /* private */ |
284 | ev_timer timer; /* private */ |
229 | ev_tstamp interval; /* ro */ |
285 | ev_tstamp interval; /* ro */ |
230 | const char *path; /* ro */ |
286 | const char *path; /* ro */ |
231 | ev_statdata prev; /* ro */ |
287 | ev_statdata prev; /* ro */ |
232 | ev_statdata attr; /* ro */ |
288 | ev_statdata attr; /* ro */ |
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289 | |
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290 | int wd; /* wd for inotify, fd for kqueue */ |
233 | } ev_stat; |
291 | } ev_stat; |
234 | #endif |
292 | #endif |
235 | |
293 | |
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294 | #if EV_IDLE_ENABLE |
236 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
295 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
237 | /* revent EV_IDLE */ |
296 | /* revent EV_IDLE */ |
238 | typedef struct ev_idle |
297 | typedef struct ev_idle |
239 | { |
298 | { |
240 | EV_WATCHER (ev_idle) |
299 | EV_WATCHER (ev_idle) |
241 | } ev_idle; |
300 | } ev_idle; |
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301 | #endif |
242 | |
302 | |
243 | /* invoked for each run of the mainloop, just before the blocking call */ |
303 | /* invoked for each run of the mainloop, just before the blocking call */ |
244 | /* you can still change events in any way you like */ |
304 | /* you can still change events in any way you like */ |
245 | /* revent EV_PREPARE */ |
305 | /* revent EV_PREPARE */ |
246 | typedef struct ev_prepare |
306 | typedef struct ev_prepare |
… | |
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253 | typedef struct ev_check |
313 | typedef struct ev_check |
254 | { |
314 | { |
255 | EV_WATCHER (ev_check) |
315 | EV_WATCHER (ev_check) |
256 | } ev_check; |
316 | } ev_check; |
257 | |
317 | |
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318 | #if EV_FORK_ENABLE |
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319 | /* the callback gets invoked before check in the child process when a fork was detected */ |
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320 | typedef struct ev_fork |
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321 | { |
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322 | EV_WATCHER (ev_fork) |
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323 | } ev_fork; |
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324 | #endif |
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325 | |
258 | #if EV_EMBED_ENABLE |
326 | #if EV_EMBED_ENABLE |
259 | /* used to embed an event loop inside another */ |
327 | /* used to embed an event loop inside another */ |
260 | /* the callback gets invoked when the event loop has handled events, and can be 0 */ |
328 | /* the callback gets invoked when the event loop has handled events, and can be 0 */ |
261 | typedef struct ev_embed |
329 | typedef struct ev_embed |
262 | { |
330 | { |
263 | EV_WATCHER (ev_embed) |
331 | EV_WATCHER (ev_embed) |
264 | |
332 | |
265 | ev_io io; /* private */ |
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266 | struct ev_loop *loop; /* ro */ |
333 | struct ev_loop *other; /* ro */ |
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334 | ev_io io; /* private */ |
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335 | ev_prepare prepare; /* private */ |
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336 | ev_check check; /* unused */ |
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337 | ev_timer timer; /* unused */ |
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338 | ev_periodic periodic; /* unused */ |
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339 | ev_idle idle; /* unused */ |
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340 | ev_fork fork; /* private */ |
267 | } ev_embed; |
341 | } ev_embed; |
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342 | #endif |
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343 | |
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344 | #if EV_ASYNC_ENABLE |
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345 | /* invoked when somebody calls ev_async_send on the watcher */ |
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346 | /* revent EV_ASYNC */ |
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347 | typedef struct ev_async |
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348 | { |
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349 | EV_WATCHER (ev_async) |
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350 | |
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351 | EV_ATOMIC_T sent; /* private */ |
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352 | } ev_async; |
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353 | |
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354 | # define ev_async_pending(w) ((w)->sent + 0) |
268 | #endif |
355 | #endif |
269 | |
356 | |
270 | /* the presence of this union forces similar struct layout */ |
357 | /* the presence of this union forces similar struct layout */ |
271 | union ev_any_watcher |
358 | union ev_any_watcher |
272 | { |
359 | { |
… | |
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274 | struct ev_watcher_list wl; |
361 | struct ev_watcher_list wl; |
275 | |
362 | |
276 | struct ev_io io; |
363 | struct ev_io io; |
277 | struct ev_timer timer; |
364 | struct ev_timer timer; |
278 | struct ev_periodic periodic; |
365 | struct ev_periodic periodic; |
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366 | struct ev_signal signal; |
279 | struct ev_child child; |
367 | struct ev_child child; |
280 | #if EV_STAT_ENABLE |
368 | #if EV_STAT_ENABLE |
281 | struct ev_stat stat; |
369 | struct ev_stat stat; |
282 | #endif |
370 | #endif |
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371 | #if EV_IDLE_ENABLE |
283 | struct ev_idle idle; |
372 | struct ev_idle idle; |
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373 | #endif |
284 | struct ev_prepare prepare; |
374 | struct ev_prepare prepare; |
285 | struct ev_check check; |
375 | struct ev_check check; |
286 | struct ev_signal signal; |
376 | #if EV_FORK_ENABLE |
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377 | struct ev_fork fork; |
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378 | #endif |
287 | #if EV_EMBED_ENABLE |
379 | #if EV_EMBED_ENABLE |
288 | struct ev_embed embed; |
380 | struct ev_embed embed; |
289 | #endif |
381 | #endif |
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382 | #if EV_ASYNC_ENABLE |
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383 | struct ev_async async; |
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384 | #endif |
290 | }; |
385 | }; |
291 | |
386 | |
292 | /* bits for ev_default_loop and ev_loop_new */ |
387 | /* bits for ev_default_loop and ev_loop_new */ |
293 | /* the default */ |
388 | /* the default */ |
294 | #define EVFLAG_AUTO 0x00000000UL /* not quite a mask */ |
389 | #define EVFLAG_AUTO 0x00000000U /* not quite a mask */ |
295 | /* flag bits */ |
390 | /* flag bits */ |
296 | #define EVFLAG_NOENV 0x01000000UL /* do NOT consult environment */ |
391 | #define EVFLAG_NOENV 0x01000000U /* do NOT consult environment */ |
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392 | #define EVFLAG_FORKCHECK 0x02000000U /* check for a fork in each iteration */ |
297 | /* method bits to be ored together */ |
393 | /* method bits to be ored together */ |
298 | #define EVBACKEND_SELECT 0x00000001UL /* about anywhere */ |
394 | #define EVBACKEND_SELECT 0x00000001U /* about anywhere */ |
299 | #define EVBACKEND_POLL 0x00000002UL /* !win */ |
395 | #define EVBACKEND_POLL 0x00000002U /* !win */ |
300 | #define EVBACKEND_EPOLL 0x00000004UL /* linux */ |
396 | #define EVBACKEND_EPOLL 0x00000004U /* linux */ |
301 | #define EVBACKEND_KQUEUE 0x00000008UL /* bsd */ |
397 | #define EVBACKEND_KQUEUE 0x00000008U /* bsd */ |
302 | #define EVBACKEND_DEVPOLL 0x00000010UL /* solaris 8 */ /* NYI */ |
398 | #define EVBACKEND_DEVPOLL 0x00000010U /* solaris 8 */ /* NYI */ |
303 | #define EVBACKEND_PORT 0x00000020UL /* solaris 10 */ |
399 | #define EVBACKEND_PORT 0x00000020U /* solaris 10 */ |
304 | |
400 | |
305 | #if EV_PROTOTYPES |
401 | #if EV_PROTOTYPES |
306 | int ev_version_major (void); |
402 | int ev_version_major (void); |
307 | int ev_version_minor (void); |
403 | int ev_version_minor (void); |
308 | |
404 | |
309 | unsigned int ev_supported_backends (void); |
405 | unsigned int ev_supported_backends (void); |
310 | unsigned int ev_recommended_backends (void); |
406 | unsigned int ev_recommended_backends (void); |
311 | unsigned int ev_embeddable_backends (void); |
407 | unsigned int ev_embeddable_backends (void); |
312 | |
408 | |
313 | ev_tstamp ev_time (void); |
409 | ev_tstamp ev_time (void); |
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410 | void ev_sleep (ev_tstamp delay); /* sleep for a while */ |
314 | |
411 | |
315 | /* Sets the allocation function to use, works like realloc. |
412 | /* Sets the allocation function to use, works like realloc. |
316 | * It is used to allocate and free memory. |
413 | * It is used to allocate and free memory. |
317 | * If it returns zero when memory needs to be allocated, the library might abort |
414 | * If it returns zero when memory needs to be allocated, the library might abort |
318 | * or take some potentially destructive action. |
415 | * or take some potentially destructive action. |
… | |
… | |
324 | * retryable syscall error |
421 | * retryable syscall error |
325 | * (such as failed select, poll, epoll_wait) |
422 | * (such as failed select, poll, epoll_wait) |
326 | */ |
423 | */ |
327 | void ev_set_syserr_cb (void (*cb)(const char *msg)); |
424 | void ev_set_syserr_cb (void (*cb)(const char *msg)); |
328 | |
425 | |
329 | # if EV_MULTIPLICITY |
426 | #if EV_MULTIPLICITY |
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427 | EV_INLINE struct ev_loop * |
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428 | ev_default_loop_uc (void) |
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429 | { |
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430 | extern struct ev_loop *ev_default_loop_ptr; |
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431 | |
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432 | return ev_default_loop_ptr; |
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433 | } |
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434 | |
330 | /* the default loop is the only one that handles signals and child watchers */ |
435 | /* the default loop is the only one that handles signals and child watchers */ |
331 | /* you can call this as often as you like */ |
436 | /* you can call this as often as you like */ |
332 | static struct ev_loop * |
437 | EV_INLINE struct ev_loop * |
333 | ev_default_loop (unsigned int flags) |
438 | ev_default_loop (unsigned int flags) |
334 | { |
439 | { |
335 | extern struct ev_loop *ev_default_loop_ptr; |
440 | struct ev_loop *loop = ev_default_loop_uc (); |
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441 | |
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442 | if (!loop) |
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443 | { |
336 | extern struct ev_loop *ev_default_loop_init (unsigned int flags); |
444 | extern struct ev_loop *ev_default_loop_init (unsigned int flags); |
337 | |
445 | |
338 | if (!ev_default_loop_ptr) |
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339 | ev_default_loop_init (flags); |
446 | loop = ev_default_loop_init (flags); |
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447 | } |
340 | |
448 | |
341 | return ev_default_loop_ptr; |
449 | return loop; |
342 | } |
450 | } |
343 | |
451 | |
344 | /* create and destroy alternative loops that don't handle signals */ |
452 | /* create and destroy alternative loops that don't handle signals */ |
345 | struct ev_loop *ev_loop_new (unsigned int flags); |
453 | struct ev_loop *ev_loop_new (unsigned int flags); |
346 | void ev_loop_destroy (EV_P); |
454 | void ev_loop_destroy (EV_P); |
347 | void ev_loop_fork (EV_P); |
455 | void ev_loop_fork (EV_P); |
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456 | void ev_loop_verify (EV_P); |
348 | |
457 | |
349 | ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ |
458 | ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ |
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459 | void ev_now_update (EV_P); |
350 | |
460 | |
351 | # else |
461 | #else |
352 | |
462 | |
353 | int ev_default_loop (unsigned int flags); /* returns true when successful */ |
463 | int ev_default_loop (unsigned int flags); /* returns true when successful */ |
354 | |
464 | |
355 | static ev_tstamp |
465 | EV_INLINE ev_tstamp |
356 | ev_now (void) |
466 | ev_now (void) |
357 | { |
467 | { |
358 | extern ev_tstamp ev_rt_now; |
468 | extern ev_tstamp ev_rt_now; |
359 | |
469 | |
360 | return ev_rt_now; |
470 | return ev_rt_now; |
361 | } |
471 | } |
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472 | #endif /* multiplicity */ |
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473 | |
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474 | EV_INLINE int |
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475 | ev_is_default_loop (EV_P) |
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476 | { |
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477 | #if EV_MULTIPLICITY |
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478 | extern struct ev_loop *ev_default_loop_ptr; |
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479 | |
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480 | return !!(EV_A == ev_default_loop_ptr); |
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481 | #else |
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482 | return 1; |
362 | # endif |
483 | #endif |
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484 | } |
363 | |
485 | |
364 | void ev_default_destroy (void); /* destroy the default loop */ |
486 | void ev_default_destroy (void); /* destroy the default loop */ |
365 | /* this needs to be called after fork, to duplicate the default loop */ |
487 | /* this needs to be called after fork, to duplicate the default loop */ |
366 | /* if you create alternative loops you have to call ev_loop_fork on them */ |
488 | /* if you create alternative loops you have to call ev_loop_fork on them */ |
367 | /* you can call it in either the parent or the child */ |
489 | /* you can call it in either the parent or the child */ |
368 | /* you can actually call it at any time, anywhere :) */ |
490 | /* you can actually call it at any time, anywhere :) */ |
369 | void ev_default_fork (void); |
491 | void ev_default_fork (void); |
370 | |
492 | |
371 | unsigned int ev_backend (EV_P); |
493 | unsigned int ev_backend (EV_P); /* backend in use by loop */ |
372 | #endif |
494 | unsigned int ev_loop_count (EV_P); /* number of loop iterations */ |
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495 | #endif /* prototypes */ |
373 | |
496 | |
374 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
497 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
375 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
498 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
376 | #define EVUNLOOP_CANCEL 0 /* undo unloop */ |
499 | #define EVUNLOOP_CANCEL 0 /* undo unloop */ |
377 | #define EVUNLOOP_ONE 1 /* unloop once */ |
500 | #define EVUNLOOP_ONE 1 /* unloop once */ |
378 | #define EVUNLOOP_ALL 2 /* unloop all loops */ |
501 | #define EVUNLOOP_ALL 2 /* unloop all loops */ |
379 | |
502 | |
380 | #if EV_PROTOTYPES |
503 | #if EV_PROTOTYPES |
381 | void ev_loop (EV_P_ int flags); |
504 | void ev_loop (EV_P_ int flags); |
382 | 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 */ |
505 | 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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506 | |
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507 | void ev_set_io_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */ |
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508 | void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */ |
383 | |
509 | |
384 | /* |
510 | /* |
385 | * ref/unref can be used to add or remove a refcount on the mainloop. every watcher |
511 | * ref/unref can be used to add or remove a refcount on the mainloop. every watcher |
386 | * keeps one reference. if you have a long-runing watcher you never unregister that |
512 | * keeps one reference. if you have a long-runing watcher you never unregister that |
387 | * should not keep ev_loop from running, unref() after starting, and ref() before stopping. |
513 | * should not keep ev_loop from running, unref() after starting, and ref() before stopping. |
… | |
… | |
394 | void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
520 | void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
395 | #endif |
521 | #endif |
396 | |
522 | |
397 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
523 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
398 | /* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
524 | /* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
399 | #define ev_init(ev,cb_) do { \ |
525 | #define ev_init(ev,cb_) do { \ |
400 | ((ev_watcher *)(void *)(ev))->active = \ |
526 | ((ev_watcher *)(void *)(ev))->active = \ |
401 | ((ev_watcher *)(void *)(ev))->pending = \ |
527 | ((ev_watcher *)(void *)(ev))->pending = \ |
402 | ((ev_watcher *)(void *)(ev))->priority = 0; \ |
528 | ((ev_watcher *)(void *)(ev))->priority = 0; \ |
403 | ev_set_cb ((ev), cb_); \ |
529 | ev_set_cb ((ev), cb_); \ |
404 | } while (0) |
530 | } while (0) |
405 | |
531 | |
406 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
532 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV_IOFDSET; } while (0) |
407 | #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
533 | #define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0) |
408 | #define ev_periodic_set(ev,at_,ival_,res_) do { (ev)->at = (at_); (ev)->interval = (ival_); (ev)->reschedule_cb= (res_); } while (0) |
534 | #define ev_periodic_set(ev,ofs_,ival_,res_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb= (res_); } while (0) |
409 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
535 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
410 | #define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) |
536 | #define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0) |
411 | #define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); } while (0) |
537 | #define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0) |
412 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
538 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
413 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
539 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
414 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
540 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
415 | #define ev_embed_set(ev,loop_) do { (ev)->loop = (loop_); } while (0) |
541 | #define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0) |
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542 | #define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */ |
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543 | #define ev_async_set(ev) do { (ev)->sent = 0; } while (0) |
416 | |
544 | |
417 | #define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
545 | #define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
418 | #define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
546 | #define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
419 | #define ev_periodic_init(ev,cb,at,ival,res) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(at),(ival),(res)); } while (0) |
547 | #define ev_periodic_init(ev,cb,at,ival,res) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(at),(ival),(res)); } while (0) |
420 | #define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
548 | #define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
421 | #define ev_child_init(ev,cb,pid) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) |
549 | #define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0) |
422 | #define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_path_set ((ev),(path),(interval)); } while (0) |
550 | #define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0) |
423 | #define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
551 | #define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
424 | #define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
552 | #define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
425 | #define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
553 | #define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
426 | #define ev_embed_init(ev,cb,loop) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(loop)); } while (0) |
554 | #define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0) |
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555 | #define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0) |
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556 | #define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0) |
427 | |
557 | |
428 | #define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ |
558 | #define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ |
429 | #define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ |
559 | #define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ |
430 | |
560 | |
431 | #define ev_priority(ev) ((ev_watcher *)(void *)(ev))->priority /* rw */ |
561 | #define ev_priority(ev) ((((ev_watcher *)(void *)(ev))->priority) + 0) |
432 | #define ev_cb(ev) (ev)->cb /* rw */ |
562 | #define ev_cb(ev) (ev)->cb /* rw */ |
433 | #define ev_set_priority(ev,pri) ev_priority (ev) = (pri) |
563 | #define ev_set_priority(ev,pri) ((ev_watcher *)(void *)(ev))->priority = (pri) |
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564 | |
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565 | #define ev_periodic_at(ev) (((ev_watcher_time *)(ev))->at + 0.) |
434 | |
566 | |
435 | #ifndef ev_set_cb |
567 | #ifndef ev_set_cb |
436 | # define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_) |
568 | # define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_) |
437 | #endif |
569 | #endif |
438 | |
570 | |
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443 | /* feeds an event into a watcher as if the event actually occured */ |
575 | /* feeds an event into a watcher as if the event actually occured */ |
444 | /* accepts any ev_watcher type */ |
576 | /* accepts any ev_watcher type */ |
445 | void ev_feed_event (EV_P_ void *w, int revents); |
577 | void ev_feed_event (EV_P_ void *w, int revents); |
446 | void ev_feed_fd_event (EV_P_ int fd, int revents); |
578 | void ev_feed_fd_event (EV_P_ int fd, int revents); |
447 | void ev_feed_signal_event (EV_P_ int signum); |
579 | void ev_feed_signal_event (EV_P_ int signum); |
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580 | void ev_invoke (EV_P_ void *w, int revents); |
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581 | int ev_clear_pending (EV_P_ void *w); |
448 | |
582 | |
449 | void ev_io_start (EV_P_ ev_io *w); |
583 | void ev_io_start (EV_P_ ev_io *w); |
450 | void ev_io_stop (EV_P_ ev_io *w); |
584 | void ev_io_stop (EV_P_ ev_io *w); |
451 | |
585 | |
452 | void ev_timer_start (EV_P_ ev_timer *w); |
586 | void ev_timer_start (EV_P_ ev_timer *w); |
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472 | void ev_stat_start (EV_P_ ev_stat *w); |
606 | void ev_stat_start (EV_P_ ev_stat *w); |
473 | void ev_stat_stop (EV_P_ ev_stat *w); |
607 | void ev_stat_stop (EV_P_ ev_stat *w); |
474 | void ev_stat_stat (EV_P_ ev_stat *w); |
608 | void ev_stat_stat (EV_P_ ev_stat *w); |
475 | # endif |
609 | # endif |
476 | |
610 | |
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611 | # if EV_IDLE_ENABLE |
477 | void ev_idle_start (EV_P_ ev_idle *w); |
612 | void ev_idle_start (EV_P_ ev_idle *w); |
478 | void ev_idle_stop (EV_P_ ev_idle *w); |
613 | void ev_idle_stop (EV_P_ ev_idle *w); |
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614 | # endif |
479 | |
615 | |
480 | void ev_prepare_start (EV_P_ ev_prepare *w); |
616 | void ev_prepare_start (EV_P_ ev_prepare *w); |
481 | void ev_prepare_stop (EV_P_ ev_prepare *w); |
617 | void ev_prepare_stop (EV_P_ ev_prepare *w); |
482 | |
618 | |
483 | void ev_check_start (EV_P_ ev_check *w); |
619 | void ev_check_start (EV_P_ ev_check *w); |
484 | void ev_check_stop (EV_P_ ev_check *w); |
620 | void ev_check_stop (EV_P_ ev_check *w); |
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621 | |
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622 | # if EV_FORK_ENABLE |
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623 | void ev_fork_start (EV_P_ ev_fork *w); |
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624 | void ev_fork_stop (EV_P_ ev_fork *w); |
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625 | # endif |
485 | |
626 | |
486 | # if EV_EMBED_ENABLE |
627 | # if EV_EMBED_ENABLE |
487 | /* only supported when loop to be embedded is in fact embeddable */ |
628 | /* only supported when loop to be embedded is in fact embeddable */ |
488 | void ev_embed_start (EV_P_ ev_embed *w); |
629 | void ev_embed_start (EV_P_ ev_embed *w); |
489 | void ev_embed_stop (EV_P_ ev_embed *w); |
630 | void ev_embed_stop (EV_P_ ev_embed *w); |
490 | void ev_embed_sweep (EV_P_ ev_embed *w); |
631 | void ev_embed_sweep (EV_P_ ev_embed *w); |
491 | # endif |
632 | # endif |
492 | |
633 | |
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634 | # if EV_ASYNC_ENABLE |
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635 | void ev_async_start (EV_P_ ev_async *w); |
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636 | void ev_async_stop (EV_P_ ev_async *w); |
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637 | void ev_async_send (EV_P_ ev_async *w); |
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638 | # endif |
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639 | |
493 | #endif |
640 | #endif |
494 | |
641 | |
495 | #ifdef __cplusplus |
642 | #ifdef __cplusplus |
496 | } |
643 | } |
497 | #endif |
644 | #endif |