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Comparing libev/ev.h (file contents):
Revision 1.23 by root, Fri Nov 2 22:03:00 2007 UTC vs.
Revision 1.126 by root, Sun Aug 9 12:34:47 2009 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
… …
42#endif 52#endif
43#ifndef EV_MAXPRI 53#ifndef EV_MAXPRI
44# define EV_MAXPRI +2 54# define EV_MAXPRI +2
45#endif 55#endif
46 56
57#ifndef EV_MULTIPLICITY
58# define EV_MULTIPLICITY 1
59#endif
60
61#ifndef EV_PERIODIC_ENABLE
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_IDLE_ENABLE
70# define EV_IDLE_ENABLE 1
71#endif
72
73#ifndef EV_FORK_ENABLE
74# define EV_FORK_ENABLE 1
75#endif
76
77#ifndef EV_EMBED_ENABLE
78# define EV_EMBED_ENABLE 1
79#endif
80
81#ifndef EV_ASYNC_ENABLE
82# define EV_ASYNC_ENABLE 1
83#endif
84
85#ifndef EV_WALK_ENABLE
86# define EV_WALK_ENABLE 0 /* not yet */
87#endif
88
89#ifndef EV_ATOMIC_T
90# include <signal.h>
91# define EV_ATOMIC_T sig_atomic_t volatile
92#endif
93
94/*****************************************************************************/
95
96#if EV_STAT_ENABLE
97# ifdef _WIN32
98# include <time.h>
99# include <sys/types.h>
100# endif
101# include <sys/stat.h>
102#endif
103
104/* support multiple event loops? */
105#if EV_MULTIPLICITY
106struct ev_loop;
107# define EV_P struct ev_loop *loop
108# define EV_P_ EV_P,
109# define EV_A loop
110# define EV_A_ EV_A,
111# define EV_DEFAULT_UC ev_default_loop_uc ()
112# define EV_DEFAULT_UC_ EV_DEFAULT_UC,
113# define EV_DEFAULT ev_default_loop (0)
114# define EV_DEFAULT_ EV_DEFAULT,
115#else
116# define EV_P void
117# define EV_P_
118# define EV_A
119# define EV_A_
120# define EV_DEFAULT
121# define EV_DEFAULT_
122# define EV_DEFAULT_UC
123# define EV_DEFAULT_UC_
124# undef EV_EMBED_ENABLE
125#endif
126
127#if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3
128# define EV_INLINE static inline
129#else
130# define EV_INLINE static
131#endif
132
133/*****************************************************************************/
134
47/* eventmask, revents, events... */ 135/* eventmask, revents, events... */
48#define EV_UNDEF -1 /* guaranteed to be invalid */ 136#define EV_UNDEF -1 /* guaranteed to be invalid */
49#define EV_NONE 0x00 137#define EV_NONE 0x00 /* no events */
50#define EV_READ 0x01 138#define EV_READ 0x01 /* ev_io detected read will not block */
51#define EV_WRITE 0x02 139#define EV_WRITE 0x02 /* ev_io detected write will not block */
52#define EV_TIMEOUT 0x000100 140#define EV__IOFDSET 0x80 /* internal use only */
53#define EV_PERIODIC 0x000200 141#define EV_IO EV_READ /* alias for type-detection */
54#define EV_SIGNAL 0x000400 142#define EV_TIMEOUT 0x00000100 /* timer timed out */
55#define EV_IDLE 0x000800 143#define EV_TIMER EV_TIMEOUT /* alias for type-detection */
56#define EV_CHECK 0x001000 144#define EV_PERIODIC 0x00000200 /* periodic timer timed out */
57#define EV_PREPARE 0x002000 145#define EV_SIGNAL 0x00000400 /* signal was received */
58#define EV_CHILD 0x004000 146#define EV_CHILD 0x00000800 /* child/pid had status change */
147#define EV_STAT 0x00001000 /* stat data changed */
148#define EV_IDLE 0x00002000 /* event loop is idling */
149#define EV_PREPARE 0x00004000 /* event loop about to poll */
150#define EV_CHECK 0x00008000 /* event loop finished poll */
151#define EV_EMBED 0x00010000 /* embedded event loop needs sweep */
152#define EV_FORK 0x00020000 /* event loop resumed in child */
153#define EV_ASYNC 0x00040000 /* async intra-loop signal */
154#define EV_CUSTOM 0x01000000 /* for use by user code */
59#define EV_ERROR 0x800000 /* sent when an error occurs */ 155#define EV_ERROR 0x80000000 /* sent when an error occurs */
60 156
61/* can be used to add custom fields to all watchers */ 157/* can be used to add custom fields to all watchers, while losing binary compatibility */
62#ifndef EV_COMMON 158#ifndef EV_COMMON
63# define EV_COMMON void *data 159# define EV_COMMON void *data;
64#endif 160#endif
65#ifndef EV_PROTOTYPES 161#ifndef EV_PROTOTYPES
66# define EV_PROTOTYPES 1 162# define EV_PROTOTYPES 1
67#endif 163#endif
68 164
69#define EV_VERSION_MAJOR 1 165#define EV_VERSION_MAJOR 3
70#define EV_VERSION_MINOR 1 166#define EV_VERSION_MINOR 8
167
168#ifndef EV_CB_DECLARE
169# define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents);
170#endif
171#ifndef EV_CB_INVOKE
172# define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents))
173#endif
71 174
72/* 175/*
73 * struct member types: 176 * struct member types:
74 * private: you can look at them, but not change them, and they might not mean anything to you. 177 * private: you may look at them, but not change them,
178 * and they might not mean anything to you.
75 * ro: can be read anytime, but only changed when the watcher isn't active 179 * ro: can be read anytime, but only changed when the watcher isn't active.
76 * rw: can be read and modified anytime, even when the watcher is active 180 * rw: can be read and modified anytime, even when the watcher is active.
181 *
182 * some internal details that might be helpful for debugging:
183 *
184 * active is either 0, which means the watcher is not active,
185 * or the array index of the watcher (periodics, timers)
186 * or the array index + 1 (most other watchers)
187 * or simply 1 for watchers that aren't in some array.
188 * pending is either 0, in which case the watcher isn't,
189 * or the array index + 1 in the pendings array.
77 */ 190 */
191
192#if EV_MINPRI == EV_MAXPRI
193# define EV_DECL_PRIORITY
194#else
195# define EV_DECL_PRIORITY int priority;
196#endif
78 197
79/* shared by all watchers */ 198/* shared by all watchers */
80#define EV_WATCHER(type) \ 199#define EV_WATCHER(type) \
81 int active; /* private */ \ 200 int active; /* private */ \
82 int pending; /* private */ \ 201 int pending; /* private */ \
83 int priority; /* ro */ \ 202 EV_DECL_PRIORITY /* private */ \
84 EV_COMMON; /* rw */ \ 203 EV_COMMON /* rw */ \
85 void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ 204 EV_CB_DECLARE (type) /* private */
86 205
87#define EV_WATCHER_LIST(type) \ 206#define EV_WATCHER_LIST(type) \
88 EV_WATCHER (type); \ 207 EV_WATCHER (type) \
89 struct type *next /* private */ 208 struct ev_watcher_list *next; /* private */
90 209
91#define EV_WATCHER_TIME(type) \ 210#define EV_WATCHER_TIME(type) \
92 EV_WATCHER (type); \ 211 EV_WATCHER (type) \
93 ev_tstamp at /* private */ 212 ev_tstamp at; /* private */
94 213
95/* base class, nothing to see here unless you subclass */ 214/* base class, nothing to see here unless you subclass */
96struct ev_watcher { 215typedef struct ev_watcher
216{
97 EV_WATCHER (ev_watcher); 217 EV_WATCHER (ev_watcher)
98}; 218} ev_watcher;
99 219
100/* base class, nothing to see here unless you subclass */ 220/* base class, nothing to see here unless you subclass */
101struct ev_watcher_list { 221typedef struct ev_watcher_list
222{
102 EV_WATCHER_LIST (ev_watcher_list); 223 EV_WATCHER_LIST (ev_watcher_list)
103}; 224} ev_watcher_list;
104 225
105/* base class, nothing to see here unless you subclass */ 226/* base class, nothing to see here unless you subclass */
106struct ev_watcher_time { 227typedef struct ev_watcher_time
228{
107 EV_WATCHER_TIME (ev_watcher_time); 229 EV_WATCHER_TIME (ev_watcher_time)
108}; 230} ev_watcher_time;
231
232/* invoked when fd is either EV_READable or EV_WRITEable */
233/* revent EV_READ, EV_WRITE */
234typedef struct ev_io
235{
236 EV_WATCHER_LIST (ev_io)
237
238 int fd; /* ro */
239 int events; /* ro */
240} ev_io;
109 241
110/* invoked after a specific time, repeatable (based on monotonic clock) */ 242/* invoked after a specific time, repeatable (based on monotonic clock) */
111/* revent EV_TIMEOUT */ 243/* revent EV_TIMEOUT */
112struct ev_timer 244typedef struct ev_timer
113{ 245{
114 EV_WATCHER_TIME (ev_timer); 246 EV_WATCHER_TIME (ev_timer)
115 247
116 ev_tstamp repeat; /* rw */ 248 ev_tstamp repeat; /* rw */
117}; 249} ev_timer;
118 250
119/* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ 251/* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */
120/* revent EV_PERIODIC */ 252/* revent EV_PERIODIC */
121struct ev_periodic 253typedef struct ev_periodic
122{ 254{
123 EV_WATCHER_TIME (ev_periodic); 255 EV_WATCHER_TIME (ev_periodic)
124 256
257 ev_tstamp offset; /* rw */
125 ev_tstamp interval; /* rw */ 258 ev_tstamp interval; /* rw */
126}; 259 ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */
127 260} ev_periodic;
128/* invoked when fd is either EV_READable or EV_WRITEable */
129/* revent EV_READ, EV_WRITE */
130struct ev_io
131{
132 EV_WATCHER_LIST (ev_io);
133
134 int fd; /* ro */
135 int events; /* ro */
136};
137 261
138/* invoked when the given signal has been received */ 262/* invoked when the given signal has been received */
139/* revent EV_SIGNAL */ 263/* revent EV_SIGNAL */
140struct ev_signal 264typedef struct ev_signal
141{ 265{
142 EV_WATCHER_LIST (ev_signal); 266 EV_WATCHER_LIST (ev_signal)
143 267
144 int signum; /* ro */ 268 int signum; /* ro */
145}; 269} ev_signal;
146 270
271/* invoked when sigchld is received and waitpid indicates the given pid */
272/* revent EV_CHILD */
273/* does not support priorities */
274typedef struct ev_child
275{
276 EV_WATCHER_LIST (ev_child)
277
278 int flags; /* private */
279 int pid; /* ro */
280 int rpid; /* rw, holds the received pid */
281 int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
282} ev_child;
283
284#if EV_STAT_ENABLE
285/* st_nlink = 0 means missing file or other error */
286# ifdef _WIN32
287typedef struct _stati64 ev_statdata;
288# else
289typedef struct stat ev_statdata;
290# endif
291
292/* invoked each time the stat data changes for a given path */
293/* revent EV_STAT */
294typedef struct ev_stat
295{
296 EV_WATCHER_LIST (ev_stat)
297
298 ev_timer timer; /* private */
299 ev_tstamp interval; /* ro */
300 const char *path; /* ro */
301 ev_statdata prev; /* ro */
302 ev_statdata attr; /* ro */
303
304 int wd; /* wd for inotify, fd for kqueue */
305} ev_stat;
306#endif
307
308#if EV_IDLE_ENABLE
147/* invoked when the nothing else needs to be done, keeps the process from blocking */ 309/* invoked when the nothing else needs to be done, keeps the process from blocking */
148/* revent EV_IDLE */ 310/* revent EV_IDLE */
149struct ev_idle 311typedef struct ev_idle
150{ 312{
151 EV_WATCHER (ev_idle); 313 EV_WATCHER (ev_idle)
152}; 314} ev_idle;
315#endif
153 316
154/* invoked for each run of the mainloop, just before the blocking call */ 317/* invoked for each run of the mainloop, just before the blocking call */
155/* you can still change events in any way you like */ 318/* you can still change events in any way you like */
156/* revent EV_PREPARE */ 319/* revent EV_PREPARE */
157struct ev_prepare 320typedef struct ev_prepare
158{ 321{
159 EV_WATCHER (ev_prepare); 322 EV_WATCHER (ev_prepare)
160}; 323} ev_prepare;
161 324
162/* invoked for each run of the mainloop, just after the blocking call */ 325/* invoked for each run of the mainloop, just after the blocking call */
163/* revent EV_CHECK */ 326/* revent EV_CHECK */
164struct ev_check 327typedef struct ev_check
165{ 328{
166 EV_WATCHER (ev_check); 329 EV_WATCHER (ev_check)
330} ev_check;
331
332#if EV_FORK_ENABLE
333/* the callback gets invoked before check in the child process when a fork was detected */
334typedef struct ev_fork
335{
336 EV_WATCHER (ev_fork)
337} ev_fork;
338#endif
339
340#if EV_EMBED_ENABLE
341/* used to embed an event loop inside another */
342/* the callback gets invoked when the event loop has handled events, and can be 0 */
343typedef struct ev_embed
344{
345 EV_WATCHER (ev_embed)
346
347 struct ev_loop *other; /* ro */
348 ev_io io; /* private */
349 ev_prepare prepare; /* private */
350 ev_check check; /* unused */
351 ev_timer timer; /* unused */
352 ev_periodic periodic; /* unused */
353 ev_idle idle; /* unused */
354 ev_fork fork; /* private */
355} ev_embed;
356#endif
357
358#if EV_ASYNC_ENABLE
359/* invoked when somebody calls ev_async_send on the watcher */
360/* revent EV_ASYNC */
361typedef struct ev_async
362{
363 EV_WATCHER (ev_async)
364
365 EV_ATOMIC_T sent; /* private */
366} ev_async;
367
368# define ev_async_pending(w) ((w)->sent + 0)
369#endif
370
371/* the presence of this union forces similar struct layout */
372union ev_any_watcher
373{
374 struct ev_watcher w;
375 struct ev_watcher_list wl;
376
377 struct ev_io io;
378 struct ev_timer timer;
379 struct ev_periodic periodic;
380 struct ev_signal signal;
381 struct ev_child child;
382#if EV_STAT_ENABLE
383 struct ev_stat stat;
384#endif
385#if EV_IDLE_ENABLE
386 struct ev_idle idle;
387#endif
388 struct ev_prepare prepare;
389 struct ev_check check;
390#if EV_FORK_ENABLE
391 struct ev_fork fork;
392#endif
393#if EV_EMBED_ENABLE
394 struct ev_embed embed;
395#endif
396#if EV_ASYNC_ENABLE
397 struct ev_async async;
398#endif
167}; 399};
168 400
169/* invoked when sigchld is received and waitpid indicates the givne pid */ 401/* bits for ev_default_loop and ev_loop_new */
170/* revent EV_CHILD */ 402/* the default */
171struct ev_child 403#define EVFLAG_AUTO 0x00000000U /* not quite a mask */
172{ 404/* flag bits */
173 EV_WATCHER_LIST (ev_child); 405#define EVFLAG_NOENV 0x01000000U /* do NOT consult environment */
406#define EVFLAG_FORKCHECK 0x02000000U /* check for a fork in each iteration */
407/* debugging/feature disable */
408#define EVFLAG_NOINOTIFY 0x00100000U /* do not attempt to use inotify */
409#define EVFLAG_NOSIGFD 0x00200000U /* do not attempt to use signalfd */
410/* method bits to be ored together */
411#define EVBACKEND_SELECT 0x00000001U /* about anywhere */
412#define EVBACKEND_POLL 0x00000002U /* !win */
413#define EVBACKEND_EPOLL 0x00000004U /* linux */
414#define EVBACKEND_KQUEUE 0x00000008U /* bsd */
415#define EVBACKEND_DEVPOLL 0x00000010U /* solaris 8 */ /* NYI */
416#define EVBACKEND_PORT 0x00000020U /* solaris 10 */
174 417
175 int pid; /* ro */
176 int status; /* rw, holds the exit status, use the macros from sys/wait.h */
177};
178
179#define EVMETHOD_AUTO 0 /* consults environment */
180#define EVMETHOD_SELECT 1
181#define EVMETHOD_POLL 2
182#define EVMETHOD_EPOLL 4
183#define EVMETHOD_KQUEUE 8
184#define EVMETHOD_DEVPOLL 16 /* NYI */
185#define EVMETHOD_PORT 32 /* NYI */
186#define EVMETHOD_ANY ~0 /* any method, do not consult env */
187#if EV_PROTOTYPES 418#if EV_PROTOTYPES
188extern int ev_method;
189int ev_init (int methods); /* returns ev_method */
190int ev_version_major (void); 419int ev_version_major (void);
191int ev_version_minor (void); 420int ev_version_minor (void);
192 421
193/* these three calls are suitable for plugging into pthread_atfork */ 422unsigned int ev_supported_backends (void);
194void ev_fork_prepare (void); 423unsigned int ev_recommended_backends (void);
195void ev_fork_parent (void); 424unsigned int ev_embeddable_backends (void);
196void ev_fork_child (void);
197 425
198extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */
199ev_tstamp ev_time (void); 426ev_tstamp ev_time (void);
427void ev_sleep (ev_tstamp delay); /* sleep for a while */
428
429/* Sets the allocation function to use, works like realloc.
430 * It is used to allocate and free memory.
431 * If it returns zero when memory needs to be allocated, the library might abort
432 * or take some potentially destructive action.
433 * The default is your system realloc function.
434 */
435void ev_set_allocator (void *(*cb)(void *ptr, long size));
436
437/* set the callback function to call on a
438 * retryable syscall error
439 * (such as failed select, poll, epoll_wait)
440 */
441void ev_set_syserr_cb (void (*cb)(const char *msg));
442
443#if EV_MULTIPLICITY
444EV_INLINE struct ev_loop *
445ev_default_loop_uc (void)
446{
447 extern struct ev_loop *ev_default_loop_ptr;
448
449 return ev_default_loop_ptr;
450}
451
452/* the default loop is the only one that handles signals and child watchers */
453/* you can call this as often as you like */
454EV_INLINE struct ev_loop *
455ev_default_loop (unsigned int flags)
456{
457 struct ev_loop *loop = ev_default_loop_uc ();
458
459 if (!loop)
460 {
461 extern struct ev_loop *ev_default_loop_init (unsigned int flags);
462
463 loop = ev_default_loop_init (flags);
464 }
465
466 return loop;
467}
468
469/* create and destroy alternative loops that don't handle signals */
470struct ev_loop *ev_loop_new (unsigned int flags);
471void ev_loop_destroy (EV_P);
472void ev_loop_fork (EV_P);
473
474ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */
475
476#else
477
478int ev_default_loop (unsigned int flags); /* returns true when successful */
479
480EV_INLINE ev_tstamp
481ev_now (void)
482{
483 extern ev_tstamp ev_rt_now;
484
485 return ev_rt_now;
486}
487#endif /* multiplicity */
488
489EV_INLINE int
490ev_is_default_loop (EV_P)
491{
492#if EV_MULTIPLICITY
493 extern struct ev_loop *ev_default_loop_ptr;
494
495 return !!(EV_A == ev_default_loop_ptr);
496#else
497 return 1;
200#endif 498#endif
499}
500
501void ev_default_destroy (void); /* destroy the default loop */
502/* this needs to be called after fork, to duplicate the default loop */
503/* if you create alternative loops you have to call ev_loop_fork on them */
504/* you can call it in either the parent or the child */
505/* you can actually call it at any time, anywhere :) */
506void ev_default_fork (void);
507
508unsigned int ev_backend (EV_P); /* backend in use by loop */
509
510void ev_now_update (EV_P); /* update event loop time */
511
512#if EV_WALK_ENABLE
513/* walk (almost) all watchers in the loop of a given type, invoking the */
514/* callback on every such watcher. The callback might stop the watcher, */
515/* but do nothing else with the loop */
516void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w));
517#endif
518
519#endif /* prototypes */
201 520
202#define EVLOOP_NONBLOCK 1 /* do not block/wait */ 521#define EVLOOP_NONBLOCK 1 /* do not block/wait */
203#define EVLOOP_ONESHOT 2 /* block *once* only */ 522#define EVLOOP_ONESHOT 2 /* block *once* only */
523#define EVUNLOOP_CANCEL 0 /* undo unloop */
524#define EVUNLOOP_ONE 1 /* unloop once */
525#define EVUNLOOP_ALL 2 /* unloop all loops */
526
204#if EV_PROTOTYPES 527#if EV_PROTOTYPES
205void ev_loop (int flags); 528void ev_loop (EV_P_ int flags);
206extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ 529void 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 */
207 530
531/*
532 * ref/unref can be used to add or remove a refcount on the mainloop. every watcher
533 * keeps one reference. if you have a long-running watcher you never unregister that
534 * should not keep ev_loop from running, unref() after starting, and ref() before stopping.
535 */
536void ev_ref (EV_P);
537void ev_unref (EV_P);
538
539/*
208/* convinience function, wait for a single event, without registering an event watcher */ 540 * convenience function, wait for a single event, without registering an event watcher
209/* if timeout is < 0, do wait indefinitely */ 541 * if timeout is < 0, do wait indefinitely
542 */
210void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); 543void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
544
545# if EV_MINIMAL < 2
546unsigned int ev_loop_count (EV_P); /* number of loop iterations */
547unsigned int ev_loop_depth (EV_P); /* #ev_loop enters - #ev_loop leaves */
548void ev_loop_verify (EV_P); /* abort if loop data corrupted */
549
550void ev_set_io_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
551void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
552
553/* advanced stuff for threading etc. support, see docs */
554void ev_set_userdata (EV_P_ void *data);
555void *ev_userdata (EV_P);
556void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P));
557void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P));
558
559unsigned int ev_pending_count (EV_P); /* number of pending events, if any */
560void ev_invoke_pending (EV_P); /* invoke all pending watchers */
561
562/*
563 * stop/start the timer handling.
564 */
565void ev_suspend (EV_P);
566void ev_resume (EV_P);
567#endif
568
211#endif 569#endif
212 570
213/* these may evaluate ev multiple times, and the other arguments at most once */ 571/* these may evaluate ev multiple times, and the other arguments at most once */
214/* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ 572/* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
215#define ev_watcher_init(ev,cb_) do { (ev)->active = (ev)->pending = (ev)->priority = 0; (ev)->cb = (cb_); } while (0) 573#define ev_init(ev,cb_) do { \
574 ((ev_watcher *)(void *)(ev))->active = \
575 ((ev_watcher *)(void *)(ev))->pending = 0; \
576 ev_set_priority ((ev), 0); \
577 ev_set_cb ((ev), cb_); \
578} while (0)
216 579
217#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) 580#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0)
218#define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) 581#define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0)
219#define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) 582#define ev_periodic_set(ev,ofs_,ival_,rcb_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0)
220#define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) 583#define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)
584#define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0)
585#define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0)
221#define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ 586#define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */
222#define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ 587#define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */
223#define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ 588#define ev_check_set(ev) /* nop, yes, this is a serious in-joke */
224#define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) 589#define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0)
590#define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */
591#define ev_async_set(ev) do { (ev)->sent = 0; } while (0)
225 592
226#define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) 593#define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)
227#define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) 594#define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)
228#define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0) 595#define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0)
229#define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) 596#define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)
597#define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0)
598#define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0)
230#define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) 599#define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)
231#define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) 600#define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)
232#define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) 601#define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
602#define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0)
603#define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0)
233#define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) 604#define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0)
234 605
606#define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */
235#define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ 607#define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */
608
609#define ev_cb(ev) (ev)->cb /* rw */
610
611#if EV_MINPRI == EV_MAXPRI
612# define ev_priority(ev) ((ev), EV_MINPRI)
236#define ev_set_priority(ev,pri) (ev)->priority = pri 613# define ev_set_priority(ev,pri) ((ev), (pri))
614#else
615# define ev_priority(ev) ((((ev_watcher *)(void *)(ev))->priority) + 0)
616# define ev_set_priority(ev,pri) ( (ev_watcher *)(void *)(ev))->priority = (pri)
617#endif
618
619#define ev_periodic_at(ev) (((ev_watcher_time *)(ev))->at + 0.)
620
621#ifndef ev_set_cb
622# define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_)
623#endif
237 624
238/* stopping (enabling, adding) a watcher does nothing if it is already running */ 625/* stopping (enabling, adding) a watcher does nothing if it is already running */
239/* stopping (disabling, deleting) a watcher does nothing unless its already running */ 626/* stopping (disabling, deleting) a watcher does nothing unless its already running */
240#if EV_PROTOTYPES 627#if EV_PROTOTYPES
628
629/* feeds an event into a watcher as if the event actually occured */
630/* accepts any ev_watcher type */
631void ev_feed_event (EV_P_ void *w, int revents);
632void ev_feed_fd_event (EV_P_ int fd, int revents);
633void ev_feed_signal_event (EV_P_ int signum);
634void ev_invoke (EV_P_ void *w, int revents);
635int ev_clear_pending (EV_P_ void *w);
636
241void ev_io_start (struct ev_io *w); 637void ev_io_start (EV_P_ ev_io *w);
242void ev_io_stop (struct ev_io *w); 638void ev_io_stop (EV_P_ ev_io *w);
243 639
244void ev_timer_start (struct ev_timer *w); 640void ev_timer_start (EV_P_ ev_timer *w);
245void ev_timer_stop (struct ev_timer *w); 641void ev_timer_stop (EV_P_ ev_timer *w);
246void ev_timer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ 642/* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
643void ev_timer_again (EV_P_ ev_timer *w);
644/* return remaining time */
645ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w);
247 646
647#if EV_PERIODIC_ENABLE
248void ev_periodic_start (struct ev_periodic *w); 648void ev_periodic_start (EV_P_ ev_periodic *w);
249void ev_periodic_stop (struct ev_periodic *w); 649void ev_periodic_stop (EV_P_ ev_periodic *w);
650void ev_periodic_again (EV_P_ ev_periodic *w);
651#endif
250 652
653/* only supported in the default loop */
251void ev_signal_start (struct ev_signal *w); 654void ev_signal_start (EV_P_ ev_signal *w);
252void ev_signal_stop (struct ev_signal *w); 655void ev_signal_stop (EV_P_ ev_signal *w);
253 656
657/* only supported in the default loop */
658void ev_child_start (EV_P_ ev_child *w);
659void ev_child_stop (EV_P_ ev_child *w);
660
661# if EV_STAT_ENABLE
662void ev_stat_start (EV_P_ ev_stat *w);
663void ev_stat_stop (EV_P_ ev_stat *w);
664void ev_stat_stat (EV_P_ ev_stat *w);
665# endif
666
667# if EV_IDLE_ENABLE
254void ev_idle_start (struct ev_idle *w); 668void ev_idle_start (EV_P_ ev_idle *w);
255void ev_idle_stop (struct ev_idle *w); 669void ev_idle_stop (EV_P_ ev_idle *w);
670# endif
256 671
257void ev_prepare_start (struct ev_prepare *w); 672void ev_prepare_start (EV_P_ ev_prepare *w);
258void ev_prepare_stop (struct ev_prepare *w); 673void ev_prepare_stop (EV_P_ ev_prepare *w);
259 674
260void ev_check_start (struct ev_check *w); 675void ev_check_start (EV_P_ ev_check *w);
261void ev_check_stop (struct ev_check *w); 676void ev_check_stop (EV_P_ ev_check *w);
262 677
263void ev_child_start (struct ev_child *w); 678# if EV_FORK_ENABLE
264void ev_child_stop (struct ev_child *w); 679void ev_fork_start (EV_P_ ev_fork *w);
680void ev_fork_stop (EV_P_ ev_fork *w);
681# endif
682
683# if EV_EMBED_ENABLE
684/* only supported when loop to be embedded is in fact embeddable */
685void ev_embed_start (EV_P_ ev_embed *w);
686void ev_embed_stop (EV_P_ ev_embed *w);
687void ev_embed_sweep (EV_P_ ev_embed *w);
688# endif
689
690# if EV_ASYNC_ENABLE
691void ev_async_start (EV_P_ ev_async *w);
692void ev_async_stop (EV_P_ ev_async *w);
693void ev_async_send (EV_P_ ev_async *w);
694# endif
695
265#endif 696#endif
266 697
267#ifdef __cplusplus 698#ifdef __cplusplus
268} 699}
269#endif 700#endif

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