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Comparing libev/ev.h (file contents):
Revision 1.67 by root, Sat Nov 24 07:14:49 2007 UTC vs.
Revision 1.133 by root, Wed Mar 10 09:23:07 2010 UTC

1/* 1/*
2 * libev native API header
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 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 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 38 */
29 39
30#ifndef EV_H__ 40#ifndef EV_H_
31#define EV_H__ 41#define EV_H_
32 42
33#ifdef __cplusplus 43#ifdef __cplusplus
34extern "C" { 44extern "C" {
35#endif 45#endif
36 46
… …
46 56
47#ifndef EV_MULTIPLICITY 57#ifndef EV_MULTIPLICITY
48# define EV_MULTIPLICITY 1 58# define EV_MULTIPLICITY 1
49#endif 59#endif
50 60
51#ifndef EV_PERIODICS 61#ifndef EV_PERIODIC_ENABLE
52# define EV_PERIODICS 1 62# define EV_PERIODIC_ENABLE 1
63#endif
64
65#ifndef EV_STAT_ENABLE
66# define EV_STAT_ENABLE 1
67#endif
68
69#ifndef EV_PREPARE_ENABLE
70# define EV_PREPARE_ENABLE 1
71#endif
72
73#ifndef EV_CHECK_ENABLE
74# define EV_CHECK_ENABLE 1
75#endif
76
77#ifndef EV_IDLE_ENABLE
78# define EV_IDLE_ENABLE 1
79#endif
80
81#ifndef EV_FORK_ENABLE
82# define EV_FORK_ENABLE 1
83#endif
84
85#ifndef EV_SIGNAL_ENABLE
86# define EV_SIGNAL_ENABLE 1
87#endif
88
89#ifndef EV_CHILD_ENABLE
90# ifdef _WIN32
91# define EV_CHILD_ENABLE 0
92# else
93# define EV_CHILD_ENABLE 1
94#endif
95#endif
96
97#ifndef EV_ASYNC_ENABLE
98# define EV_ASYNC_ENABLE 1
99#endif
100
101#ifndef EV_EMBED_ENABLE
102# define EV_EMBED_ENABLE 1
103#endif
104
105#ifndef EV_WALK_ENABLE
106# define EV_WALK_ENABLE 0 /* not yet */
107#endif
108
109#ifndef EV_ATOMIC_T
110# include <signal.h>
111# define EV_ATOMIC_T sig_atomic_t volatile
112#endif
113
114/*****************************************************************************/
115
116#if EV_CHILD_ENABLE && !EV_SIGNAL_ENABLE
117# undef EV_SIGNAL_ENABLE
118# define EV_SIGNAL_ENABLE 1
119#endif
120
121#if EV_STAT_ENABLE
122# ifdef _WIN32
123# include <time.h>
124# include <sys/types.h>
125# endif
126# include <sys/stat.h>
53#endif 127#endif
54 128
55/* support multiple event loops? */ 129/* support multiple event loops? */
56#if EV_MULTIPLICITY 130#if EV_MULTIPLICITY
57struct ev_loop; 131struct ev_loop;
58# define EV_P struct ev_loop *loop 132# define EV_P struct ev_loop *loop
59# define EV_P_ EV_P, 133# define EV_P_ EV_P,
60# define EV_A loop 134# define EV_A loop
61# define EV_A_ EV_A, 135# define EV_A_ EV_A,
136# define EV_DEFAULT_UC ev_default_loop_uc ()
137# define EV_DEFAULT_UC_ EV_DEFAULT_UC,
62# define EV_DEFAULT_A ev_default_loop (0) 138# define EV_DEFAULT ev_default_loop (0)
63# define EV_DEFAULT_A_ EV_DEFAULT_A, 139# define EV_DEFAULT_ EV_DEFAULT,
64#else 140#else
65# define EV_P void 141# define EV_P void
66# define EV_P_ 142# define EV_P_
67# define EV_A 143# define EV_A
68# define EV_A_ 144# define EV_A_
145# define EV_DEFAULT
69# define EV_DEFAULT_A 146# define EV_DEFAULT_
147# define EV_DEFAULT_UC
70# define EV_DEFAULT_A_ 148# define EV_DEFAULT_UC_
149# undef EV_EMBED_ENABLE
71#endif 150#endif
151
152#if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3
153# define EV_INLINE static inline
154#else
155# define EV_INLINE static
156#endif
157
158/*****************************************************************************/
72 159
73/* eventmask, revents, events... */ 160/* eventmask, revents, events... */
74#define EV_UNDEF -1L /* guaranteed to be invalid */ 161#define EV_UNDEF -1 /* guaranteed to be invalid */
75#define EV_NONE 0x00L
76#define EV_READ 0x01L /* io only */ 162#define EV_NONE 0x00 /* no events */
77#define EV_WRITE 0x02L /* io only */ 163#define EV_READ 0x01 /* ev_io detected read will not block */
164#define EV_WRITE 0x02 /* ev_io detected write will not block */
165#define EV__IOFDSET 0x80 /* internal use only */
166#define EV_IO EV_READ /* alias for type-detection */
78#define EV_TIMEOUT 0x000100L /* timer only */ 167#define EV_TIMEOUT 0x00000100 /* timer timed out */
168#define EV_TIMER EV_TIMEOUT /* alias for type-detection */
79#define EV_PERIODIC 0x000200L /* periodic timer only */ 169#define EV_PERIODIC 0x00000200 /* periodic timer timed out */
80#define EV_SIGNAL 0x000400L /* signal only */ 170#define EV_SIGNAL 0x00000400 /* signal was received */
81#define EV_IDLE 0x000800L /* idle only */
82#define EV_CHECK 0x001000L /* check only */
83#define EV_PREPARE 0x002000L /* prepare only */
84#define EV_CHILD 0x004000L /* child/pid only */ 171#define EV_CHILD 0x00000800 /* child/pid had status change */
172#define EV_STAT 0x00001000 /* stat data changed */
173#define EV_IDLE 0x00002000 /* event loop is idling */
174#define EV_PREPARE 0x00004000 /* event loop about to poll */
175#define EV_CHECK 0x00008000 /* event loop finished poll */
85#define EV_EMBED 0x008000L /* embedded event loop */ 176#define EV_EMBED 0x00010000 /* embedded event loop needs sweep */
177#define EV_FORK 0x00020000 /* event loop resumed in child */
178#define EV_ASYNC 0x00040000 /* async intra-loop signal */
179#define EV_CUSTOM 0x01000000 /* for use by user code */
86#define EV_ERROR 0x800000L /* sent when an error occurs */ 180#define EV_ERROR 0x80000000 /* sent when an error occurs */
87 181
88/* can be used to add custom fields to all watchers, while losing binary compatibility */ 182/* can be used to add custom fields to all watchers, while losing binary compatibility */
89#ifndef EV_COMMON 183#ifndef EV_COMMON
90# define EV_COMMON void *data; 184# define EV_COMMON void *data;
91#endif 185#endif
92#ifndef EV_PROTOTYPES 186#ifndef EV_PROTOTYPES
93# define EV_PROTOTYPES 1 187# define EV_PROTOTYPES 1
94#endif 188#endif
95 189
96#define EV_VERSION_MAJOR 1 190#define EV_VERSION_MAJOR 3
97#define EV_VERSION_MINOR 1 191#define EV_VERSION_MINOR 9
98 192
99#ifndef EV_CB_DECLARE 193#ifndef EV_CB_DECLARE
100# define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents); 194# define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents);
101#endif 195#endif
102#ifndef EV_CB_INVOKE 196#ifndef EV_CB_INVOKE
103# define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents)) 197# define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents))
104#endif 198#endif
105 199
106/* 200/*
107 * struct member types: 201 * struct member types:
108 * private: you can look at them, but not change them, and they might not mean anything to you. 202 * private: you may look at them, but not change them,
203 * and they might not mean anything to you.
109 * ro: can be read anytime, but only changed when the watcher isn't active 204 * ro: can be read anytime, but only changed when the watcher isn't active.
110 * rw: can be read and modified anytime, even when the watcher is active 205 * rw: can be read and modified anytime, even when the watcher is active.
206 *
207 * some internal details that might be helpful for debugging:
208 *
209 * active is either 0, which means the watcher is not active,
210 * or the array index of the watcher (periodics, timers)
211 * or the array index + 1 (most other watchers)
212 * or simply 1 for watchers that aren't in some array.
213 * pending is either 0, in which case the watcher isn't,
214 * or the array index + 1 in the pendings array.
111 */ 215 */
216
217#if EV_MINPRI == EV_MAXPRI
218# define EV_DECL_PRIORITY
219#else
220# define EV_DECL_PRIORITY int priority;
221#endif
112 222
113/* shared by all watchers */ 223/* shared by all watchers */
114#define EV_WATCHER(type) \ 224#define EV_WATCHER(type) \
115 int active; /* private */ \ 225 int active; /* private */ \
116 int pending; /* private */ \ 226 int pending; /* private */ \
117 int priority; /* private */ \ 227 EV_DECL_PRIORITY /* private */ \
118 EV_COMMON /* rw */ \ 228 EV_COMMON /* rw */ \
119 EV_CB_DECLARE (type) /* private */ 229 EV_CB_DECLARE (type) /* private */
120 230
121#define EV_WATCHER_LIST(type) \ 231#define EV_WATCHER_LIST(type) \
122 EV_WATCHER (type) \ 232 EV_WATCHER (type) \
… …
142typedef struct ev_watcher_time 252typedef struct ev_watcher_time
143{ 253{
144 EV_WATCHER_TIME (ev_watcher_time) 254 EV_WATCHER_TIME (ev_watcher_time)
145} ev_watcher_time; 255} ev_watcher_time;
146 256
257/* invoked when fd is either EV_READable or EV_WRITEable */
258/* revent EV_READ, EV_WRITE */
259typedef struct ev_io
260{
261 EV_WATCHER_LIST (ev_io)
262
263 int fd; /* ro */
264 int events; /* ro */
265} ev_io;
266
147/* invoked after a specific time, repeatable (based on monotonic clock) */ 267/* invoked after a specific time, repeatable (based on monotonic clock) */
148/* revent EV_TIMEOUT */ 268/* revent EV_TIMEOUT */
149typedef struct ev_timer 269typedef struct ev_timer
150{ 270{
151 EV_WATCHER_TIME (ev_timer) 271 EV_WATCHER_TIME (ev_timer)
… …
157/* revent EV_PERIODIC */ 277/* revent EV_PERIODIC */
158typedef struct ev_periodic 278typedef struct ev_periodic
159{ 279{
160 EV_WATCHER_TIME (ev_periodic) 280 EV_WATCHER_TIME (ev_periodic)
161 281
282 ev_tstamp offset; /* rw */
162 ev_tstamp interval; /* rw */ 283 ev_tstamp interval; /* rw */
163 ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */ 284 ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */
164} ev_periodic; 285} ev_periodic;
165 286
166/* invoked when fd is either EV_READable or EV_WRITEable */
167/* revent EV_READ, EV_WRITE */
168typedef struct ev_io
169{
170 EV_WATCHER_LIST (ev_io)
171
172 int fd; /* ro */
173 int events; /* ro */
174} ev_io;
175
176/* invoked when the given signal has been received */ 287/* invoked when the given signal has been received */
177/* revent EV_SIGNAL */ 288/* revent EV_SIGNAL */
178typedef struct ev_signal 289typedef struct ev_signal
179{ 290{
180 EV_WATCHER_LIST (ev_signal) 291 EV_WATCHER_LIST (ev_signal)
181 292
182 int signum; /* ro */ 293 int signum; /* ro */
183} ev_signal; 294} ev_signal;
184 295
296/* invoked when sigchld is received and waitpid indicates the given pid */
297/* revent EV_CHILD */
298/* does not support priorities */
299typedef struct ev_child
300{
301 EV_WATCHER_LIST (ev_child)
302
303 int flags; /* private */
304 int pid; /* ro */
305 int rpid; /* rw, holds the received pid */
306 int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
307} ev_child;
308
309#if EV_STAT_ENABLE
310/* st_nlink = 0 means missing file or other error */
311# ifdef _WIN32
312typedef struct _stati64 ev_statdata;
313# else
314typedef struct stat ev_statdata;
315# endif
316
317/* invoked each time the stat data changes for a given path */
318/* revent EV_STAT */
319typedef struct ev_stat
320{
321 EV_WATCHER_LIST (ev_stat)
322
323 ev_timer timer; /* private */
324 ev_tstamp interval; /* ro */
325 const char *path; /* ro */
326 ev_statdata prev; /* ro */
327 ev_statdata attr; /* ro */
328
329 int wd; /* wd for inotify, fd for kqueue */
330} ev_stat;
331#endif
332
333#if EV_IDLE_ENABLE
185/* invoked when the nothing else needs to be done, keeps the process from blocking */ 334/* invoked when the nothing else needs to be done, keeps the process from blocking */
186/* revent EV_IDLE */ 335/* revent EV_IDLE */
187typedef struct ev_idle 336typedef struct ev_idle
188{ 337{
189 EV_WATCHER (ev_idle) 338 EV_WATCHER (ev_idle)
190} ev_idle; 339} ev_idle;
340#endif
191 341
192/* invoked for each run of the mainloop, just before the blocking call */ 342/* invoked for each run of the mainloop, just before the blocking call */
193/* you can still change events in any way you like */ 343/* you can still change events in any way you like */
194/* revent EV_PREPARE */ 344/* revent EV_PREPARE */
195typedef struct ev_prepare 345typedef struct ev_prepare
… …
202typedef struct ev_check 352typedef struct ev_check
203{ 353{
204 EV_WATCHER (ev_check) 354 EV_WATCHER (ev_check)
205} ev_check; 355} ev_check;
206 356
207/* invoked when sigchld is received and waitpid indicates the given pid */ 357#if EV_FORK_ENABLE
208/* revent EV_CHILD */ 358/* the callback gets invoked before check in the child process when a fork was detected */
209/* does not support priorities */
210typedef struct ev_child 359typedef struct ev_fork
211{ 360{
212 EV_WATCHER_LIST (ev_child) 361 EV_WATCHER (ev_fork)
362} ev_fork;
363#endif
213 364
214 int pid; /* ro */ 365#if EV_EMBED_ENABLE
215 int rpid; /* rw, holds the received pid */
216 int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
217} ev_child;
218
219#if EV_MULTIPLICITY
220/* used to embed an event loop inside another */ 366/* used to embed an event loop inside another */
221/* the callback gets invoked when the event loop has handled events, and can be 0 */ 367/* the callback gets invoked when the event loop has handled events, and can be 0 */
222typedef struct ev_embed 368typedef struct ev_embed
223{ 369{
224 EV_WATCHER (ev_embed) 370 EV_WATCHER (ev_embed)
225 371
226 ev_io io; /* private */
227 struct ev_loop *loop; /* ro */ 372 struct ev_loop *other; /* ro */
373 ev_io io; /* private */
374 ev_prepare prepare; /* private */
375 ev_check check; /* unused */
376 ev_timer timer; /* unused */
377 ev_periodic periodic; /* unused */
378 ev_idle idle; /* unused */
379 ev_fork fork; /* private */
228} ev_embed; 380} ev_embed;
381#endif
382
383#if EV_ASYNC_ENABLE
384/* invoked when somebody calls ev_async_send on the watcher */
385/* revent EV_ASYNC */
386typedef struct ev_async
387{
388 EV_WATCHER (ev_async)
389
390 EV_ATOMIC_T sent; /* private */
391} ev_async;
392
393# define ev_async_pending(w) (+(w)->sent)
229#endif 394#endif
230 395
231/* the presence of this union forces similar struct layout */ 396/* the presence of this union forces similar struct layout */
232union ev_any_watcher 397union ev_any_watcher
233{ 398{
… …
235 struct ev_watcher_list wl; 400 struct ev_watcher_list wl;
236 401
237 struct ev_io io; 402 struct ev_io io;
238 struct ev_timer timer; 403 struct ev_timer timer;
239 struct ev_periodic periodic; 404 struct ev_periodic periodic;
405 struct ev_signal signal;
406 struct ev_child child;
407#if EV_STAT_ENABLE
408 struct ev_stat stat;
409#endif
410#if EV_IDLE_ENABLE
240 struct ev_idle idle; 411 struct ev_idle idle;
412#endif
241 struct ev_prepare prepare; 413 struct ev_prepare prepare;
242 struct ev_check check; 414 struct ev_check check;
243 struct ev_signal signal; 415#if EV_FORK_ENABLE
244 struct ev_child child; 416 struct ev_fork fork;
245#if EV_MULTIPLICITY 417#endif
418#if EV_EMBED_ENABLE
246 struct ev_embed embed; 419 struct ev_embed embed;
420#endif
421#if EV_ASYNC_ENABLE
422 struct ev_async async;
247#endif 423#endif
248}; 424};
249 425
250/* bits for ev_default_loop and ev_loop_new */ 426/* bits for ev_default_loop and ev_loop_new */
251/* the default */ 427/* the default */
252#define EVFLAG_AUTO 0x00000000UL /* not quite a mask */ 428#define EVFLAG_AUTO 0x00000000U /* not quite a mask */
253/* flag bits */ 429/* flag bits */
254#define EVFLAG_NOENV 0x01000000UL /* do NOT consult environment */ 430#define EVFLAG_NOENV 0x01000000U /* do NOT consult environment */
431#define EVFLAG_FORKCHECK 0x02000000U /* check for a fork in each iteration */
432/* debugging/feature disable */
433#define EVFLAG_NOINOTIFY 0x00100000U /* do not attempt to use inotify */
434#define EVFLAG_NOSIGFD 0 /* compatibility to pre-3.9 */
435#define EVFLAG_SIGNALFD 0x00200000U /* attempt to use signalfd */
255/* method bits to be ored together */ 436/* method bits to be ored together */
256#define EVBACKEND_SELECT 0x00000001UL /* about anywhere */ 437#define EVBACKEND_SELECT 0x00000001U /* about anywhere */
257#define EVBACKEND_POLL 0x00000002UL /* !win */ 438#define EVBACKEND_POLL 0x00000002U /* !win */
258#define EVBACKEND_EPOLL 0x00000004UL /* linux */ 439#define EVBACKEND_EPOLL 0x00000004U /* linux */
259#define EVBACKEND_KQUEUE 0x00000008UL /* bsd */ 440#define EVBACKEND_KQUEUE 0x00000008U /* bsd */
260#define EVBACKEND_DEVPOLL 0x00000010UL /* solaris 8 */ /* NYI */ 441#define EVBACKEND_DEVPOLL 0x00000010U /* solaris 8 */ /* NYI */
261#define EVBACKEND_PORT 0x00000020UL /* solaris 10 */ 442#define EVBACKEND_PORT 0x00000020U /* solaris 10 */
443#define EVBACKEND_ALL 0x0000003FU
262 444
263#if EV_PROTOTYPES 445#if EV_PROTOTYPES
264int ev_version_major (void); 446int ev_version_major (void);
265int ev_version_minor (void); 447int ev_version_minor (void);
266 448
267unsigned int ev_supported_backends (void); 449unsigned int ev_supported_backends (void);
268unsigned int ev_recommended_backends (void); 450unsigned int ev_recommended_backends (void);
269unsigned int ev_embeddable_backends (void); 451unsigned int ev_embeddable_backends (void);
270 452
271ev_tstamp ev_time (void); 453ev_tstamp ev_time (void);
454void ev_sleep (ev_tstamp delay); /* sleep for a while */
272 455
273/* Sets the allocation function to use, works like realloc. 456/* Sets the allocation function to use, works like realloc.
274 * It is used to allocate and free memory. 457 * It is used to allocate and free memory.
275 * If it returns zero when memory needs to be allocated, the library might abort 458 * If it returns zero when memory needs to be allocated, the library might abort
276 * or take some potentially destructive action. 459 * or take some potentially destructive action.
… …
282 * retryable syscall error 465 * retryable syscall error
283 * (such as failed select, poll, epoll_wait) 466 * (such as failed select, poll, epoll_wait)
284 */ 467 */
285void ev_set_syserr_cb (void (*cb)(const char *msg)); 468void ev_set_syserr_cb (void (*cb)(const char *msg));
286 469
287# if EV_MULTIPLICITY 470#if EV_MULTIPLICITY
471EV_INLINE struct ev_loop *
472ev_default_loop_uc (void)
473{
474 extern struct ev_loop *ev_default_loop_ptr;
475
476 return ev_default_loop_ptr;
477}
478
288/* the default loop is the only one that handles signals and child watchers */ 479/* the default loop is the only one that handles signals and child watchers */
289/* you can call this as often as you like */ 480/* you can call this as often as you like */
290static struct ev_loop * 481EV_INLINE struct ev_loop *
291ev_default_loop (unsigned int flags) 482ev_default_loop (unsigned int flags)
292{ 483{
293 extern struct ev_loop *ev_default_loop_ptr; 484 struct ev_loop *loop = ev_default_loop_uc ();
485
486 if (!loop)
487 {
294 extern struct ev_loop *ev_default_loop_init (unsigned int flags); 488 extern struct ev_loop *ev_default_loop_init (unsigned int flags);
295 489
296 if (!ev_default_loop_ptr)
297 ev_default_loop_init (flags); 490 loop = ev_default_loop_init (flags);
491 }
298 492
299 return ev_default_loop_ptr; 493 return loop;
300} 494}
301 495
302/* create and destroy alternative loops that don't handle signals */ 496/* create and destroy alternative loops that don't handle signals */
303struct ev_loop *ev_loop_new (unsigned int flags); 497struct ev_loop *ev_loop_new (unsigned int flags);
304void ev_loop_destroy (EV_P); 498void ev_loop_destroy (EV_P);
305void ev_loop_fork (EV_P); 499void ev_loop_fork (EV_P);
306 500
307ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ 501ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */
308 502
309# else 503#else
310 504
311int ev_default_loop (unsigned int flags); /* returns true when successful */ 505int ev_default_loop (unsigned int flags); /* returns true when successful */
312 506
313static ev_tstamp 507EV_INLINE ev_tstamp
314ev_now (void) 508ev_now (void)
315{ 509{
316 extern ev_tstamp ev_rt_now; 510 extern ev_tstamp ev_rt_now;
317 511
318 return ev_rt_now; 512 return ev_rt_now;
319} 513}
514#endif /* multiplicity */
515
516EV_INLINE int
517ev_is_default_loop (EV_P)
518{
519#if EV_MULTIPLICITY
520 extern struct ev_loop *ev_default_loop_ptr;
521
522 return !!(EV_A == ev_default_loop_ptr);
523#else
524 return 1;
320# endif 525#endif
526}
321 527
322void ev_default_destroy (void); /* destroy the default loop */ 528void ev_default_destroy (void); /* destroy the default loop */
323/* this needs to be called after fork, to duplicate the default loop */ 529/* this needs to be called after fork, to duplicate the default loop */
324/* if you create alternative loops you have to call ev_loop_fork on them */ 530/* if you create alternative loops you have to call ev_loop_fork on them */
325/* you can call it in either the parent or the child */ 531/* you can call it in either the parent or the child */
326/* you can actually call it at any time, anywhere :) */ 532/* you can actually call it at any time, anywhere :) */
327void ev_default_fork (void); 533void ev_default_fork (void);
328 534
329unsigned int ev_backend (EV_P); 535unsigned int ev_backend (EV_P); /* backend in use by loop */
536
537void ev_now_update (EV_P); /* update event loop time */
538
539#if EV_WALK_ENABLE
540/* walk (almost) all watchers in the loop of a given type, invoking the */
541/* callback on every such watcher. The callback might stop the watcher, */
542/* but do nothing else with the loop */
543void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w));
330#endif 544#endif
545
546#endif /* prototypes */
331 547
332#define EVLOOP_NONBLOCK 1 /* do not block/wait */ 548#define EVLOOP_NONBLOCK 1 /* do not block/wait */
333#define EVLOOP_ONESHOT 2 /* block *once* only */ 549#define EVLOOP_ONESHOT 2 /* block *once* only */
334#define EVUNLOOP_CANCEL 0 /* undo unloop */ 550#define EVUNLOOP_CANCEL 0 /* undo unloop */
335#define EVUNLOOP_ONE 1 /* unloop once */ 551#define EVUNLOOP_ONE 1 /* unloop once */
… …
339void ev_loop (EV_P_ int flags); 555void ev_loop (EV_P_ int flags);
340void 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 */ 556void 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 */
341 557
342/* 558/*
343 * ref/unref can be used to add or remove a refcount on the mainloop. every watcher 559 * ref/unref can be used to add or remove a refcount on the mainloop. every watcher
344 * keeps one reference. if you have a long-runing watcher you never unregister that 560 * keeps one reference. if you have a long-running watcher you never unregister that
345 * should not keep ev_loop from running, unref() after starting, and ref() before stopping. 561 * should not keep ev_loop from running, unref() after starting, and ref() before stopping.
346 */ 562 */
347void ev_ref (EV_P); 563void ev_ref (EV_P);
348void ev_unref (EV_P); 564void ev_unref (EV_P);
349 565
566/*
350/* convinience function, wait for a single event, without registering an event watcher */ 567 * convenience function, wait for a single event, without registering an event watcher
351/* if timeout is < 0, do wait indefinitely */ 568 * if timeout is < 0, do wait indefinitely
569 */
352void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); 570void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
571
572# if EV_MINIMAL < 2
573unsigned int ev_loop_count (EV_P); /* number of loop iterations */
574unsigned int ev_loop_depth (EV_P); /* #ev_loop enters - #ev_loop leaves */
575void ev_loop_verify (EV_P); /* abort if loop data corrupted */
576
577void ev_set_io_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
578void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
579
580/* advanced stuff for threading etc. support, see docs */
581void ev_set_userdata (EV_P_ void *data);
582void *ev_userdata (EV_P);
583void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P));
584void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P));
585
586unsigned int ev_pending_count (EV_P); /* number of pending events, if any */
587void ev_invoke_pending (EV_P); /* invoke all pending watchers */
588
589/*
590 * stop/start the timer handling.
591 */
592void ev_suspend (EV_P);
593void ev_resume (EV_P);
594#endif
595
353#endif 596#endif
354 597
355/* these may evaluate ev multiple times, and the other arguments at most once */ 598/* these may evaluate ev multiple times, and the other arguments at most once */
356/* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ 599/* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
357#define ev_init(ev,cb_) do { \ 600#define ev_init(ev,cb_) do { \
358 ((ev_watcher *)(void *)(ev))->active = \ 601 ((ev_watcher *)(void *)(ev))->active = \
359 ((ev_watcher *)(void *)(ev))->pending = \ 602 ((ev_watcher *)(void *)(ev))->pending = 0; \
360 ((ev_watcher *)(void *)(ev))->priority = 0; \ 603 ev_set_priority ((ev), 0); \
361 ev_set_cb ((ev), cb_); \ 604 ev_set_cb ((ev), cb_); \
362} while (0) 605} while (0)
363 606
364#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) 607#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0)
365#define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) 608#define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0)
366#define ev_periodic_set(ev,at_,ival_,res_) do { (ev)->at = (at_); (ev)->interval = (ival_); (ev)->reschedule_cb= (res_); } while (0) 609#define ev_periodic_set(ev,ofs_,ival_,rcb_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0)
367#define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) 610#define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)
611#define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0)
612#define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0)
368#define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ 613#define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */
369#define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ 614#define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */
370#define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ 615#define ev_check_set(ev) /* nop, yes, this is a serious in-joke */
371#define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0)
372#define ev_embed_set(ev,loop_) do { (ev)->loop = (loop_); } while (0) 616#define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0)
617#define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */
618#define ev_async_set(ev) do { (ev)->sent = 0; } while (0)
373 619
374#define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) 620#define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)
375#define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) 621#define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)
376#define ev_periodic_init(ev,cb,at,ival,res) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(at),(ival),(res)); } while (0) 622#define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0)
377#define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) 623#define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)
624#define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0)
625#define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0)
378#define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) 626#define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)
379#define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) 627#define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)
380#define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0) 628#define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
381#define ev_child_init(ev,cb,pid) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0)
382#define ev_embed_init(ev,cb,loop) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(loop)); } while (0) 629#define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0)
630#define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0)
631#define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0)
383 632
384#define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ 633#define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */
385#define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ 634#define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */
386 635
387#define ev_priority(ev) ((ev_watcher *)(void *)(ev))->priority /* rw */
388#define ev_cb(ev) (ev)->cb /* rw */ 636#define ev_cb(ev) (ev)->cb /* rw */
637
638#if EV_MINPRI == EV_MAXPRI
639# define ev_priority(ev) ((ev), EV_MINPRI)
389#define ev_set_priority(ev,pri) ev_priority (ev) = (pri) 640# define ev_set_priority(ev,pri) ((ev), (pri))
641#else
642# define ev_priority(ev) (+(((ev_watcher *)(void *)(ev))->priority))
643# define ev_set_priority(ev,pri) ( (ev_watcher *)(void *)(ev))->priority = (pri)
644#endif
645
646#define ev_periodic_at(ev) (+((ev_watcher_time *)(ev))->at)
390 647
391#ifndef ev_set_cb 648#ifndef ev_set_cb
392# define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_) 649# define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_)
393#endif 650#endif
394 651
395/* stopping (enabling, adding) a watcher does nothing if it is already running */ 652/* stopping (enabling, adding) a watcher does nothing if it is already running */
396/* stopping (disabling, deleting) a watcher does nothing unless its already running */ 653/* stopping (disabling, deleting) a watcher does nothing unless its already running */
397#if EV_PROTOTYPES 654#if EV_PROTOTYPES
398 655
399/* feeds an event into a watcher as if the event actually occured */ 656/* feeds an event into a watcher as if the event actually occured */
400/* accepts any ev_watcher type */ 657/* accepts any ev_watcher type */
401void ev_feed_event (EV_P_ void *w, int revents); 658void ev_feed_event (EV_P_ void *w, int revents);
402void ev_feed_fd_event (EV_P_ int fd, int revents); 659void ev_feed_fd_event (EV_P_ int fd, int revents);
660#if EV_SIGNAL_ENABLE
403void ev_feed_signal_event (EV_P_ int signum); 661void ev_feed_signal_event (EV_P_ int signum);
662#endif
663void ev_invoke (EV_P_ void *w, int revents);
664int ev_clear_pending (EV_P_ void *w);
404 665
405void ev_io_start (EV_P_ ev_io *w); 666void ev_io_start (EV_P_ ev_io *w);
406void ev_io_stop (EV_P_ ev_io *w); 667void ev_io_stop (EV_P_ ev_io *w);
407 668
408void ev_timer_start (EV_P_ ev_timer *w); 669void ev_timer_start (EV_P_ ev_timer *w);
409void ev_timer_stop (EV_P_ ev_timer *w); 670void ev_timer_stop (EV_P_ ev_timer *w);
410/* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ 671/* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
411void ev_timer_again (EV_P_ ev_timer *w); 672void ev_timer_again (EV_P_ ev_timer *w);
673/* return remaining time */
674ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w);
412 675
413#if EV_PERIODICS 676#if EV_PERIODIC_ENABLE
414void ev_periodic_start (EV_P_ ev_periodic *w); 677void ev_periodic_start (EV_P_ ev_periodic *w);
415void ev_periodic_stop (EV_P_ ev_periodic *w); 678void ev_periodic_stop (EV_P_ ev_periodic *w);
416void ev_periodic_again (EV_P_ ev_periodic *w); 679void ev_periodic_again (EV_P_ ev_periodic *w);
417#endif 680#endif
418 681
682/* only supported in the default loop */
683#if EV_SIGNAL_ENABLE
684void ev_signal_start (EV_P_ ev_signal *w);
685void ev_signal_stop (EV_P_ ev_signal *w);
686#endif
687
688/* only supported in the default loop */
689# if EV_CHILD_ENABLE
690void ev_child_start (EV_P_ ev_child *w);
691void ev_child_stop (EV_P_ ev_child *w);
692# endif
693
694# if EV_STAT_ENABLE
695void ev_stat_start (EV_P_ ev_stat *w);
696void ev_stat_stop (EV_P_ ev_stat *w);
697void ev_stat_stat (EV_P_ ev_stat *w);
698# endif
699
700# if EV_IDLE_ENABLE
419void ev_idle_start (EV_P_ ev_idle *w); 701void ev_idle_start (EV_P_ ev_idle *w);
420void ev_idle_stop (EV_P_ ev_idle *w); 702void ev_idle_stop (EV_P_ ev_idle *w);
703# endif
421 704
705#if EV_PREPARE_ENABLE
422void ev_prepare_start (EV_P_ ev_prepare *w); 706void ev_prepare_start (EV_P_ ev_prepare *w);
423void ev_prepare_stop (EV_P_ ev_prepare *w); 707void ev_prepare_stop (EV_P_ ev_prepare *w);
708#endif
424 709
710#if EV_CHECK_ENABLE
425void ev_check_start (EV_P_ ev_check *w); 711void ev_check_start (EV_P_ ev_check *w);
426void ev_check_stop (EV_P_ ev_check *w); 712void ev_check_stop (EV_P_ ev_check *w);
713#endif
427 714
428/* only supported in the default loop */ 715# if EV_FORK_ENABLE
429void ev_signal_start (EV_P_ ev_signal *w);
430void ev_signal_stop (EV_P_ ev_signal *w);
431
432/* only supported in the default loop */
433void ev_child_start (EV_P_ ev_child *w); 716void ev_fork_start (EV_P_ ev_fork *w);
434void ev_child_stop (EV_P_ ev_child *w); 717void ev_fork_stop (EV_P_ ev_fork *w);
718# endif
435 719
436# if EV_MULTIPLICITY 720# if EV_EMBED_ENABLE
437/* only supported when loop to be embedded is in fact embeddable */ 721/* only supported when loop to be embedded is in fact embeddable */
438void ev_embed_start (EV_P_ ev_embed *w); 722void ev_embed_start (EV_P_ ev_embed *w);
439void ev_embed_stop (EV_P_ ev_embed *w); 723void ev_embed_stop (EV_P_ ev_embed *w);
440void ev_embed_loop (EV_P_ ev_embed *w); 724void ev_embed_sweep (EV_P_ ev_embed *w);
725# endif
726
727# if EV_ASYNC_ENABLE
728void ev_async_start (EV_P_ ev_async *w);
729void ev_async_stop (EV_P_ ev_async *w);
730void ev_async_send (EV_P_ ev_async *w);
441# endif 731# endif
442 732
443#endif 733#endif
444 734
445#ifdef __cplusplus 735#ifdef __cplusplus

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