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Revision: 1.267
Committed: Mon Oct 27 11:08:29 2008 UTC (15 years, 8 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.266: +1 -1 lines
Log Message:
work around epoll spurious notifications

File Contents

# Content
1 /*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are 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.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
38 */
39
40 #ifdef __cplusplus
41 extern "C" {
42 #endif
43
44 /* this big block deduces configuration from config.h */
45 #ifndef EV_STANDALONE
46 # ifdef EV_CONFIG_H
47 # include EV_CONFIG_H
48 # else
49 # include "config.h"
50 # endif
51
52 # if HAVE_CLOCK_GETTIME
53 # ifndef EV_USE_MONOTONIC
54 # define EV_USE_MONOTONIC 1
55 # endif
56 # ifndef EV_USE_REALTIME
57 # define EV_USE_REALTIME 1
58 # endif
59 # else
60 # ifndef EV_USE_MONOTONIC
61 # define EV_USE_MONOTONIC 0
62 # endif
63 # ifndef EV_USE_REALTIME
64 # define EV_USE_REALTIME 0
65 # endif
66 # endif
67
68 # ifndef EV_USE_NANOSLEEP
69 # if HAVE_NANOSLEEP
70 # define EV_USE_NANOSLEEP 1
71 # else
72 # define EV_USE_NANOSLEEP 0
73 # endif
74 # endif
75
76 # ifndef EV_USE_SELECT
77 # if HAVE_SELECT && HAVE_SYS_SELECT_H
78 # define EV_USE_SELECT 1
79 # else
80 # define EV_USE_SELECT 0
81 # endif
82 # endif
83
84 # ifndef EV_USE_POLL
85 # if HAVE_POLL && HAVE_POLL_H
86 # define EV_USE_POLL 1
87 # else
88 # define EV_USE_POLL 0
89 # endif
90 # endif
91
92 # ifndef EV_USE_EPOLL
93 # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94 # define EV_USE_EPOLL 1
95 # else
96 # define EV_USE_EPOLL 0
97 # endif
98 # endif
99
100 # ifndef EV_USE_KQUEUE
101 # if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102 # define EV_USE_KQUEUE 1
103 # else
104 # define EV_USE_KQUEUE 0
105 # endif
106 # endif
107
108 # ifndef EV_USE_PORT
109 # if HAVE_PORT_H && HAVE_PORT_CREATE
110 # define EV_USE_PORT 1
111 # else
112 # define EV_USE_PORT 0
113 # endif
114 # endif
115
116 # ifndef EV_USE_INOTIFY
117 # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118 # define EV_USE_INOTIFY 1
119 # else
120 # define EV_USE_INOTIFY 0
121 # endif
122 # endif
123
124 # ifndef EV_USE_EVENTFD
125 # if HAVE_EVENTFD
126 # define EV_USE_EVENTFD 1
127 # else
128 # define EV_USE_EVENTFD 0
129 # endif
130 # endif
131
132 #endif
133
134 #include <math.h>
135 #include <stdlib.h>
136 #include <fcntl.h>
137 #include <stddef.h>
138
139 #include <stdio.h>
140
141 #include <assert.h>
142 #include <errno.h>
143 #include <sys/types.h>
144 #include <time.h>
145
146 #include <signal.h>
147
148 #ifdef EV_H
149 # include EV_H
150 #else
151 # include "ev.h"
152 #endif
153
154 #ifndef _WIN32
155 # include <sys/time.h>
156 # include <sys/wait.h>
157 # include <unistd.h>
158 #else
159 # include <io.h>
160 # define WIN32_LEAN_AND_MEAN
161 # include <windows.h>
162 # ifndef EV_SELECT_IS_WINSOCKET
163 # define EV_SELECT_IS_WINSOCKET 1
164 # endif
165 #endif
166
167 /* this block tries to deduce configuration from header-defined symbols and defaults */
168
169 #ifndef EV_USE_MONOTONIC
170 # if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171 # define EV_USE_MONOTONIC 1
172 # else
173 # define EV_USE_MONOTONIC 0
174 # endif
175 #endif
176
177 #ifndef EV_USE_REALTIME
178 # define EV_USE_REALTIME 0
179 #endif
180
181 #ifndef EV_USE_NANOSLEEP
182 # if _POSIX_C_SOURCE >= 199309L
183 # define EV_USE_NANOSLEEP 1
184 # else
185 # define EV_USE_NANOSLEEP 0
186 # endif
187 #endif
188
189 #ifndef EV_USE_SELECT
190 # define EV_USE_SELECT 1
191 #endif
192
193 #ifndef EV_USE_POLL
194 # ifdef _WIN32
195 # define EV_USE_POLL 0
196 # else
197 # define EV_USE_POLL 1
198 # endif
199 #endif
200
201 #ifndef EV_USE_EPOLL
202 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203 # define EV_USE_EPOLL 1
204 # else
205 # define EV_USE_EPOLL 0
206 # endif
207 #endif
208
209 #ifndef EV_USE_KQUEUE
210 # define EV_USE_KQUEUE 0
211 #endif
212
213 #ifndef EV_USE_PORT
214 # define EV_USE_PORT 0
215 #endif
216
217 #ifndef EV_USE_INOTIFY
218 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
219 # define EV_USE_INOTIFY 1
220 # else
221 # define EV_USE_INOTIFY 0
222 # endif
223 #endif
224
225 #ifndef EV_PID_HASHSIZE
226 # if EV_MINIMAL
227 # define EV_PID_HASHSIZE 1
228 # else
229 # define EV_PID_HASHSIZE 16
230 # endif
231 #endif
232
233 #ifndef EV_INOTIFY_HASHSIZE
234 # if EV_MINIMAL
235 # define EV_INOTIFY_HASHSIZE 1
236 # else
237 # define EV_INOTIFY_HASHSIZE 16
238 # endif
239 #endif
240
241 #ifndef EV_USE_EVENTFD
242 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243 # define EV_USE_EVENTFD 1
244 # else
245 # define EV_USE_EVENTFD 0
246 # endif
247 #endif
248
249 #if 0 /* debugging */
250 # define EV_VERIFY 3
251 # define EV_USE_4HEAP 1
252 # define EV_HEAP_CACHE_AT 1
253 #endif
254
255 #ifndef EV_VERIFY
256 # define EV_VERIFY !EV_MINIMAL
257 #endif
258
259 #ifndef EV_USE_4HEAP
260 # define EV_USE_4HEAP !EV_MINIMAL
261 #endif
262
263 #ifndef EV_HEAP_CACHE_AT
264 # define EV_HEAP_CACHE_AT !EV_MINIMAL
265 #endif
266
267 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
268
269 #ifndef CLOCK_MONOTONIC
270 # undef EV_USE_MONOTONIC
271 # define EV_USE_MONOTONIC 0
272 #endif
273
274 #ifndef CLOCK_REALTIME
275 # undef EV_USE_REALTIME
276 # define EV_USE_REALTIME 0
277 #endif
278
279 #if !EV_STAT_ENABLE
280 # undef EV_USE_INOTIFY
281 # define EV_USE_INOTIFY 0
282 #endif
283
284 #if !EV_USE_NANOSLEEP
285 # ifndef _WIN32
286 # include <sys/select.h>
287 # endif
288 #endif
289
290 #if EV_USE_INOTIFY
291 # include <sys/utsname.h>
292 # include <sys/inotify.h>
293 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294 # ifndef IN_DONT_FOLLOW
295 # undef EV_USE_INOTIFY
296 # define EV_USE_INOTIFY 0
297 # endif
298 #endif
299
300 #if EV_SELECT_IS_WINSOCKET
301 # include <winsock.h>
302 #endif
303
304 #if EV_USE_EVENTFD
305 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306 # include <stdint.h>
307 # ifdef __cplusplus
308 extern "C" {
309 # endif
310 int eventfd (unsigned int initval, int flags);
311 # ifdef __cplusplus
312 }
313 # endif
314 #endif
315
316 /**/
317
318 #if EV_VERIFY >= 3
319 # define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
320 #else
321 # define EV_FREQUENT_CHECK do { } while (0)
322 #endif
323
324 /*
325 * This is used to avoid floating point rounding problems.
326 * It is added to ev_rt_now when scheduling periodics
327 * to ensure progress, time-wise, even when rounding
328 * errors are against us.
329 * This value is good at least till the year 4000.
330 * Better solutions welcome.
331 */
332 #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
333
334 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
335 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
336 /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
337
338 #if __GNUC__ >= 4
339 # define expect(expr,value) __builtin_expect ((expr),(value))
340 # define noinline __attribute__ ((noinline))
341 #else
342 # define expect(expr,value) (expr)
343 # define noinline
344 # if __STDC_VERSION__ < 199901L && __GNUC__ < 2
345 # define inline
346 # endif
347 #endif
348
349 #define expect_false(expr) expect ((expr) != 0, 0)
350 #define expect_true(expr) expect ((expr) != 0, 1)
351 #define inline_size static inline
352
353 #if EV_MINIMAL
354 # define inline_speed static noinline
355 #else
356 # define inline_speed static inline
357 #endif
358
359 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
360 #define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
361
362 #define EMPTY /* required for microsofts broken pseudo-c compiler */
363 #define EMPTY2(a,b) /* used to suppress some warnings */
364
365 typedef ev_watcher *W;
366 typedef ev_watcher_list *WL;
367 typedef ev_watcher_time *WT;
368
369 #define ev_active(w) ((W)(w))->active
370 #define ev_at(w) ((WT)(w))->at
371
372 #if EV_USE_MONOTONIC
373 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
374 /* giving it a reasonably high chance of working on typical architetcures */
375 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376 #endif
377
378 #ifdef _WIN32
379 # include "ev_win32.c"
380 #endif
381
382 /*****************************************************************************/
383
384 static void (*syserr_cb)(const char *msg);
385
386 void
387 ev_set_syserr_cb (void (*cb)(const char *msg))
388 {
389 syserr_cb = cb;
390 }
391
392 static void noinline
393 syserr (const char *msg)
394 {
395 if (!msg)
396 msg = "(libev) system error";
397
398 if (syserr_cb)
399 syserr_cb (msg);
400 else
401 {
402 perror (msg);
403 abort ();
404 }
405 }
406
407 static void *
408 ev_realloc_emul (void *ptr, long size)
409 {
410 /* some systems, notably openbsd and darwin, fail to properly
411 * implement realloc (x, 0) (as required by both ansi c-98 and
412 * the single unix specification, so work around them here.
413 */
414
415 if (size)
416 return realloc (ptr, size);
417
418 free (ptr);
419 return 0;
420 }
421
422 static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
423
424 void
425 ev_set_allocator (void *(*cb)(void *ptr, long size))
426 {
427 alloc = cb;
428 }
429
430 inline_speed void *
431 ev_realloc (void *ptr, long size)
432 {
433 ptr = alloc (ptr, size);
434
435 if (!ptr && size)
436 {
437 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
438 abort ();
439 }
440
441 return ptr;
442 }
443
444 #define ev_malloc(size) ev_realloc (0, (size))
445 #define ev_free(ptr) ev_realloc ((ptr), 0)
446
447 /*****************************************************************************/
448
449 typedef struct
450 {
451 WL head;
452 unsigned char events;
453 unsigned char reify;
454 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455 unsigned char egen; /* generation counter to counter epoll bugs */
456 #if EV_SELECT_IS_WINSOCKET
457 SOCKET handle;
458 #endif
459 } ANFD;
460
461 typedef struct
462 {
463 W w;
464 int events;
465 } ANPENDING;
466
467 #if EV_USE_INOTIFY
468 /* hash table entry per inotify-id */
469 typedef struct
470 {
471 WL head;
472 } ANFS;
473 #endif
474
475 /* Heap Entry */
476 #if EV_HEAP_CACHE_AT
477 typedef struct {
478 ev_tstamp at;
479 WT w;
480 } ANHE;
481
482 #define ANHE_w(he) (he).w /* access watcher, read-write */
483 #define ANHE_at(he) (he).at /* access cached at, read-only */
484 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
485 #else
486 typedef WT ANHE;
487
488 #define ANHE_w(he) (he)
489 #define ANHE_at(he) (he)->at
490 #define ANHE_at_cache(he)
491 #endif
492
493 #if EV_MULTIPLICITY
494
495 struct ev_loop
496 {
497 ev_tstamp ev_rt_now;
498 #define ev_rt_now ((loop)->ev_rt_now)
499 #define VAR(name,decl) decl;
500 #include "ev_vars.h"
501 #undef VAR
502 };
503 #include "ev_wrap.h"
504
505 static struct ev_loop default_loop_struct;
506 struct ev_loop *ev_default_loop_ptr;
507
508 #else
509
510 ev_tstamp ev_rt_now;
511 #define VAR(name,decl) static decl;
512 #include "ev_vars.h"
513 #undef VAR
514
515 static int ev_default_loop_ptr;
516
517 #endif
518
519 /*****************************************************************************/
520
521 ev_tstamp
522 ev_time (void)
523 {
524 #if EV_USE_REALTIME
525 struct timespec ts;
526 clock_gettime (CLOCK_REALTIME, &ts);
527 return ts.tv_sec + ts.tv_nsec * 1e-9;
528 #else
529 struct timeval tv;
530 gettimeofday (&tv, 0);
531 return tv.tv_sec + tv.tv_usec * 1e-6;
532 #endif
533 }
534
535 ev_tstamp inline_size
536 get_clock (void)
537 {
538 #if EV_USE_MONOTONIC
539 if (expect_true (have_monotonic))
540 {
541 struct timespec ts;
542 clock_gettime (CLOCK_MONOTONIC, &ts);
543 return ts.tv_sec + ts.tv_nsec * 1e-9;
544 }
545 #endif
546
547 return ev_time ();
548 }
549
550 #if EV_MULTIPLICITY
551 ev_tstamp
552 ev_now (EV_P)
553 {
554 return ev_rt_now;
555 }
556 #endif
557
558 void
559 ev_sleep (ev_tstamp delay)
560 {
561 if (delay > 0.)
562 {
563 #if EV_USE_NANOSLEEP
564 struct timespec ts;
565
566 ts.tv_sec = (time_t)delay;
567 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
568
569 nanosleep (&ts, 0);
570 #elif defined(_WIN32)
571 Sleep ((unsigned long)(delay * 1e3));
572 #else
573 struct timeval tv;
574
575 tv.tv_sec = (time_t)delay;
576 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577
578 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
579 /* somehting nto guaranteed by newer posix versions, but guaranteed */
580 /* by older ones */
581 select (0, 0, 0, 0, &tv);
582 #endif
583 }
584 }
585
586 /*****************************************************************************/
587
588 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
589
590 int inline_size
591 array_nextsize (int elem, int cur, int cnt)
592 {
593 int ncur = cur + 1;
594
595 do
596 ncur <<= 1;
597 while (cnt > ncur);
598
599 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
600 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
601 {
602 ncur *= elem;
603 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
604 ncur = ncur - sizeof (void *) * 4;
605 ncur /= elem;
606 }
607
608 return ncur;
609 }
610
611 static noinline void *
612 array_realloc (int elem, void *base, int *cur, int cnt)
613 {
614 *cur = array_nextsize (elem, *cur, cnt);
615 return ev_realloc (base, elem * *cur);
616 }
617
618 #define array_init_zero(base,count) \
619 memset ((void *)(base), 0, sizeof (*(base)) * (count))
620
621 #define array_needsize(type,base,cur,cnt,init) \
622 if (expect_false ((cnt) > (cur))) \
623 { \
624 int ocur_ = (cur); \
625 (base) = (type *)array_realloc \
626 (sizeof (type), (base), &(cur), (cnt)); \
627 init ((base) + (ocur_), (cur) - ocur_); \
628 }
629
630 #if 0
631 #define array_slim(type,stem) \
632 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
633 { \
634 stem ## max = array_roundsize (stem ## cnt >> 1); \
635 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
636 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
637 }
638 #endif
639
640 #define array_free(stem, idx) \
641 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
642
643 /*****************************************************************************/
644
645 void noinline
646 ev_feed_event (EV_P_ void *w, int revents)
647 {
648 W w_ = (W)w;
649 int pri = ABSPRI (w_);
650
651 if (expect_false (w_->pending))
652 pendings [pri][w_->pending - 1].events |= revents;
653 else
654 {
655 w_->pending = ++pendingcnt [pri];
656 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
657 pendings [pri][w_->pending - 1].w = w_;
658 pendings [pri][w_->pending - 1].events = revents;
659 }
660 }
661
662 void inline_speed
663 queue_events (EV_P_ W *events, int eventcnt, int type)
664 {
665 int i;
666
667 for (i = 0; i < eventcnt; ++i)
668 ev_feed_event (EV_A_ events [i], type);
669 }
670
671 /*****************************************************************************/
672
673 void inline_speed
674 fd_event (EV_P_ int fd, int revents)
675 {
676 ANFD *anfd = anfds + fd;
677 ev_io *w;
678
679 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
680 {
681 int ev = w->events & revents;
682
683 if (ev)
684 ev_feed_event (EV_A_ (W)w, ev);
685 }
686 }
687
688 void
689 ev_feed_fd_event (EV_P_ int fd, int revents)
690 {
691 if (fd >= 0 && fd < anfdmax)
692 fd_event (EV_A_ fd, revents);
693 }
694
695 void inline_size
696 fd_reify (EV_P)
697 {
698 int i;
699
700 for (i = 0; i < fdchangecnt; ++i)
701 {
702 int fd = fdchanges [i];
703 ANFD *anfd = anfds + fd;
704 ev_io *w;
705
706 unsigned char events = 0;
707
708 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
709 events |= (unsigned char)w->events;
710
711 #if EV_SELECT_IS_WINSOCKET
712 if (events)
713 {
714 unsigned long arg;
715 #ifdef EV_FD_TO_WIN32_HANDLE
716 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717 #else
718 anfd->handle = _get_osfhandle (fd);
719 #endif
720 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
721 }
722 #endif
723
724 {
725 unsigned char o_events = anfd->events;
726 unsigned char o_reify = anfd->reify;
727
728 anfd->reify = 0;
729 anfd->events = events;
730
731 if (o_events != events || o_reify & EV_IOFDSET)
732 backend_modify (EV_A_ fd, o_events, events);
733 }
734 }
735
736 fdchangecnt = 0;
737 }
738
739 void inline_size
740 fd_change (EV_P_ int fd, int flags)
741 {
742 unsigned char reify = anfds [fd].reify;
743 anfds [fd].reify |= flags;
744
745 if (expect_true (!reify))
746 {
747 ++fdchangecnt;
748 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
749 fdchanges [fdchangecnt - 1] = fd;
750 }
751 }
752
753 void inline_speed
754 fd_kill (EV_P_ int fd)
755 {
756 ev_io *w;
757
758 while ((w = (ev_io *)anfds [fd].head))
759 {
760 ev_io_stop (EV_A_ w);
761 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
762 }
763 }
764
765 int inline_size
766 fd_valid (int fd)
767 {
768 #ifdef _WIN32
769 return _get_osfhandle (fd) != -1;
770 #else
771 return fcntl (fd, F_GETFD) != -1;
772 #endif
773 }
774
775 /* called on EBADF to verify fds */
776 static void noinline
777 fd_ebadf (EV_P)
778 {
779 int fd;
780
781 for (fd = 0; fd < anfdmax; ++fd)
782 if (anfds [fd].events)
783 if (!fd_valid (fd) && errno == EBADF)
784 fd_kill (EV_A_ fd);
785 }
786
787 /* called on ENOMEM in select/poll to kill some fds and retry */
788 static void noinline
789 fd_enomem (EV_P)
790 {
791 int fd;
792
793 for (fd = anfdmax; fd--; )
794 if (anfds [fd].events)
795 {
796 fd_kill (EV_A_ fd);
797 return;
798 }
799 }
800
801 /* usually called after fork if backend needs to re-arm all fds from scratch */
802 static void noinline
803 fd_rearm_all (EV_P)
804 {
805 int fd;
806
807 for (fd = 0; fd < anfdmax; ++fd)
808 if (anfds [fd].events)
809 {
810 anfds [fd].events = 0;
811 fd_change (EV_A_ fd, EV_IOFDSET | 1);
812 }
813 }
814
815 /*****************************************************************************/
816
817 /*
818 * the heap functions want a real array index. array index 0 uis guaranteed to not
819 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
820 * the branching factor of the d-tree.
821 */
822
823 /*
824 * at the moment we allow libev the luxury of two heaps,
825 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
826 * which is more cache-efficient.
827 * the difference is about 5% with 50000+ watchers.
828 */
829 #if EV_USE_4HEAP
830
831 #define DHEAP 4
832 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
833 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
834 #define UPHEAP_DONE(p,k) ((p) == (k))
835
836 /* away from the root */
837 void inline_speed
838 downheap (ANHE *heap, int N, int k)
839 {
840 ANHE he = heap [k];
841 ANHE *E = heap + N + HEAP0;
842
843 for (;;)
844 {
845 ev_tstamp minat;
846 ANHE *minpos;
847 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
848
849 /* find minimum child */
850 if (expect_true (pos + DHEAP - 1 < E))
851 {
852 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
853 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
854 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
855 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
856 }
857 else if (pos < E)
858 {
859 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
860 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
861 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
862 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
863 }
864 else
865 break;
866
867 if (ANHE_at (he) <= minat)
868 break;
869
870 heap [k] = *minpos;
871 ev_active (ANHE_w (*minpos)) = k;
872
873 k = minpos - heap;
874 }
875
876 heap [k] = he;
877 ev_active (ANHE_w (he)) = k;
878 }
879
880 #else /* 4HEAP */
881
882 #define HEAP0 1
883 #define HPARENT(k) ((k) >> 1)
884 #define UPHEAP_DONE(p,k) (!(p))
885
886 /* away from the root */
887 void inline_speed
888 downheap (ANHE *heap, int N, int k)
889 {
890 ANHE he = heap [k];
891
892 for (;;)
893 {
894 int c = k << 1;
895
896 if (c > N + HEAP0 - 1)
897 break;
898
899 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
900 ? 1 : 0;
901
902 if (ANHE_at (he) <= ANHE_at (heap [c]))
903 break;
904
905 heap [k] = heap [c];
906 ev_active (ANHE_w (heap [k])) = k;
907
908 k = c;
909 }
910
911 heap [k] = he;
912 ev_active (ANHE_w (he)) = k;
913 }
914 #endif
915
916 /* towards the root */
917 void inline_speed
918 upheap (ANHE *heap, int k)
919 {
920 ANHE he = heap [k];
921
922 for (;;)
923 {
924 int p = HPARENT (k);
925
926 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
927 break;
928
929 heap [k] = heap [p];
930 ev_active (ANHE_w (heap [k])) = k;
931 k = p;
932 }
933
934 heap [k] = he;
935 ev_active (ANHE_w (he)) = k;
936 }
937
938 void inline_size
939 adjustheap (ANHE *heap, int N, int k)
940 {
941 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
942 upheap (heap, k);
943 else
944 downheap (heap, N, k);
945 }
946
947 /* rebuild the heap: this function is used only once and executed rarely */
948 void inline_size
949 reheap (ANHE *heap, int N)
950 {
951 int i;
952
953 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
954 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
955 for (i = 0; i < N; ++i)
956 upheap (heap, i + HEAP0);
957 }
958
959 /*****************************************************************************/
960
961 typedef struct
962 {
963 WL head;
964 EV_ATOMIC_T gotsig;
965 } ANSIG;
966
967 static ANSIG *signals;
968 static int signalmax;
969
970 static EV_ATOMIC_T gotsig;
971
972 /*****************************************************************************/
973
974 void inline_speed
975 fd_intern (int fd)
976 {
977 #ifdef _WIN32
978 unsigned long arg = 1;
979 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
980 #else
981 fcntl (fd, F_SETFD, FD_CLOEXEC);
982 fcntl (fd, F_SETFL, O_NONBLOCK);
983 #endif
984 }
985
986 static void noinline
987 evpipe_init (EV_P)
988 {
989 if (!ev_is_active (&pipeev))
990 {
991 #if EV_USE_EVENTFD
992 if ((evfd = eventfd (0, 0)) >= 0)
993 {
994 evpipe [0] = -1;
995 fd_intern (evfd);
996 ev_io_set (&pipeev, evfd, EV_READ);
997 }
998 else
999 #endif
1000 {
1001 while (pipe (evpipe))
1002 syserr ("(libev) error creating signal/async pipe");
1003
1004 fd_intern (evpipe [0]);
1005 fd_intern (evpipe [1]);
1006 ev_io_set (&pipeev, evpipe [0], EV_READ);
1007 }
1008
1009 ev_io_start (EV_A_ &pipeev);
1010 ev_unref (EV_A); /* watcher should not keep loop alive */
1011 }
1012 }
1013
1014 void inline_size
1015 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1016 {
1017 if (!*flag)
1018 {
1019 int old_errno = errno; /* save errno because write might clobber it */
1020
1021 *flag = 1;
1022
1023 #if EV_USE_EVENTFD
1024 if (evfd >= 0)
1025 {
1026 uint64_t counter = 1;
1027 write (evfd, &counter, sizeof (uint64_t));
1028 }
1029 else
1030 #endif
1031 write (evpipe [1], &old_errno, 1);
1032
1033 errno = old_errno;
1034 }
1035 }
1036
1037 static void
1038 pipecb (EV_P_ ev_io *iow, int revents)
1039 {
1040 #if EV_USE_EVENTFD
1041 if (evfd >= 0)
1042 {
1043 uint64_t counter;
1044 read (evfd, &counter, sizeof (uint64_t));
1045 }
1046 else
1047 #endif
1048 {
1049 char dummy;
1050 read (evpipe [0], &dummy, 1);
1051 }
1052
1053 if (gotsig && ev_is_default_loop (EV_A))
1054 {
1055 int signum;
1056 gotsig = 0;
1057
1058 for (signum = signalmax; signum--; )
1059 if (signals [signum].gotsig)
1060 ev_feed_signal_event (EV_A_ signum + 1);
1061 }
1062
1063 #if EV_ASYNC_ENABLE
1064 if (gotasync)
1065 {
1066 int i;
1067 gotasync = 0;
1068
1069 for (i = asynccnt; i--; )
1070 if (asyncs [i]->sent)
1071 {
1072 asyncs [i]->sent = 0;
1073 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1074 }
1075 }
1076 #endif
1077 }
1078
1079 /*****************************************************************************/
1080
1081 static void
1082 ev_sighandler (int signum)
1083 {
1084 #if EV_MULTIPLICITY
1085 struct ev_loop *loop = &default_loop_struct;
1086 #endif
1087
1088 #if _WIN32
1089 signal (signum, ev_sighandler);
1090 #endif
1091
1092 signals [signum - 1].gotsig = 1;
1093 evpipe_write (EV_A_ &gotsig);
1094 }
1095
1096 void noinline
1097 ev_feed_signal_event (EV_P_ int signum)
1098 {
1099 WL w;
1100
1101 #if EV_MULTIPLICITY
1102 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1103 #endif
1104
1105 --signum;
1106
1107 if (signum < 0 || signum >= signalmax)
1108 return;
1109
1110 signals [signum].gotsig = 0;
1111
1112 for (w = signals [signum].head; w; w = w->next)
1113 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1114 }
1115
1116 /*****************************************************************************/
1117
1118 static WL childs [EV_PID_HASHSIZE];
1119
1120 #ifndef _WIN32
1121
1122 static ev_signal childev;
1123
1124 #ifndef WIFCONTINUED
1125 # define WIFCONTINUED(status) 0
1126 #endif
1127
1128 void inline_speed
1129 child_reap (EV_P_ int chain, int pid, int status)
1130 {
1131 ev_child *w;
1132 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1133
1134 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1135 {
1136 if ((w->pid == pid || !w->pid)
1137 && (!traced || (w->flags & 1)))
1138 {
1139 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1140 w->rpid = pid;
1141 w->rstatus = status;
1142 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1143 }
1144 }
1145 }
1146
1147 #ifndef WCONTINUED
1148 # define WCONTINUED 0
1149 #endif
1150
1151 static void
1152 childcb (EV_P_ ev_signal *sw, int revents)
1153 {
1154 int pid, status;
1155
1156 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1157 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1158 if (!WCONTINUED
1159 || errno != EINVAL
1160 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1161 return;
1162
1163 /* make sure we are called again until all children have been reaped */
1164 /* we need to do it this way so that the callback gets called before we continue */
1165 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1166
1167 child_reap (EV_A_ pid, pid, status);
1168 if (EV_PID_HASHSIZE > 1)
1169 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1170 }
1171
1172 #endif
1173
1174 /*****************************************************************************/
1175
1176 #if EV_USE_PORT
1177 # include "ev_port.c"
1178 #endif
1179 #if EV_USE_KQUEUE
1180 # include "ev_kqueue.c"
1181 #endif
1182 #if EV_USE_EPOLL
1183 # include "ev_epoll.c"
1184 #endif
1185 #if EV_USE_POLL
1186 # include "ev_poll.c"
1187 #endif
1188 #if EV_USE_SELECT
1189 # include "ev_select.c"
1190 #endif
1191
1192 int
1193 ev_version_major (void)
1194 {
1195 return EV_VERSION_MAJOR;
1196 }
1197
1198 int
1199 ev_version_minor (void)
1200 {
1201 return EV_VERSION_MINOR;
1202 }
1203
1204 /* return true if we are running with elevated privileges and should ignore env variables */
1205 int inline_size
1206 enable_secure (void)
1207 {
1208 #ifdef _WIN32
1209 return 0;
1210 #else
1211 return getuid () != geteuid ()
1212 || getgid () != getegid ();
1213 #endif
1214 }
1215
1216 unsigned int
1217 ev_supported_backends (void)
1218 {
1219 unsigned int flags = 0;
1220
1221 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1222 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1223 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1224 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1225 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1226
1227 return flags;
1228 }
1229
1230 unsigned int
1231 ev_recommended_backends (void)
1232 {
1233 unsigned int flags = ev_supported_backends ();
1234
1235 #ifndef __NetBSD__
1236 /* kqueue is borked on everything but netbsd apparently */
1237 /* it usually doesn't work correctly on anything but sockets and pipes */
1238 flags &= ~EVBACKEND_KQUEUE;
1239 #endif
1240 #ifdef __APPLE__
1241 // flags &= ~EVBACKEND_KQUEUE; for documentation
1242 flags &= ~EVBACKEND_POLL;
1243 #endif
1244
1245 return flags;
1246 }
1247
1248 unsigned int
1249 ev_embeddable_backends (void)
1250 {
1251 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1252
1253 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1254 /* please fix it and tell me how to detect the fix */
1255 flags &= ~EVBACKEND_EPOLL;
1256
1257 return flags;
1258 }
1259
1260 unsigned int
1261 ev_backend (EV_P)
1262 {
1263 return backend;
1264 }
1265
1266 unsigned int
1267 ev_loop_count (EV_P)
1268 {
1269 return loop_count;
1270 }
1271
1272 void
1273 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1274 {
1275 io_blocktime = interval;
1276 }
1277
1278 void
1279 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1280 {
1281 timeout_blocktime = interval;
1282 }
1283
1284 static void noinline
1285 loop_init (EV_P_ unsigned int flags)
1286 {
1287 if (!backend)
1288 {
1289 #if EV_USE_MONOTONIC
1290 {
1291 struct timespec ts;
1292 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1293 have_monotonic = 1;
1294 }
1295 #endif
1296
1297 ev_rt_now = ev_time ();
1298 mn_now = get_clock ();
1299 now_floor = mn_now;
1300 rtmn_diff = ev_rt_now - mn_now;
1301
1302 io_blocktime = 0.;
1303 timeout_blocktime = 0.;
1304 backend = 0;
1305 backend_fd = -1;
1306 gotasync = 0;
1307 #if EV_USE_INOTIFY
1308 fs_fd = -2;
1309 #endif
1310
1311 /* pid check not overridable via env */
1312 #ifndef _WIN32
1313 if (flags & EVFLAG_FORKCHECK)
1314 curpid = getpid ();
1315 #endif
1316
1317 if (!(flags & EVFLAG_NOENV)
1318 && !enable_secure ()
1319 && getenv ("LIBEV_FLAGS"))
1320 flags = atoi (getenv ("LIBEV_FLAGS"));
1321
1322 if (!(flags & 0x0000ffffU))
1323 flags |= ev_recommended_backends ();
1324
1325 #if EV_USE_PORT
1326 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1327 #endif
1328 #if EV_USE_KQUEUE
1329 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1330 #endif
1331 #if EV_USE_EPOLL
1332 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1333 #endif
1334 #if EV_USE_POLL
1335 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1336 #endif
1337 #if EV_USE_SELECT
1338 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1339 #endif
1340
1341 ev_init (&pipeev, pipecb);
1342 ev_set_priority (&pipeev, EV_MAXPRI);
1343 }
1344 }
1345
1346 static void noinline
1347 loop_destroy (EV_P)
1348 {
1349 int i;
1350
1351 if (ev_is_active (&pipeev))
1352 {
1353 ev_ref (EV_A); /* signal watcher */
1354 ev_io_stop (EV_A_ &pipeev);
1355
1356 #if EV_USE_EVENTFD
1357 if (evfd >= 0)
1358 close (evfd);
1359 #endif
1360
1361 if (evpipe [0] >= 0)
1362 {
1363 close (evpipe [0]);
1364 close (evpipe [1]);
1365 }
1366 }
1367
1368 #if EV_USE_INOTIFY
1369 if (fs_fd >= 0)
1370 close (fs_fd);
1371 #endif
1372
1373 if (backend_fd >= 0)
1374 close (backend_fd);
1375
1376 #if EV_USE_PORT
1377 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1378 #endif
1379 #if EV_USE_KQUEUE
1380 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1381 #endif
1382 #if EV_USE_EPOLL
1383 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1384 #endif
1385 #if EV_USE_POLL
1386 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1387 #endif
1388 #if EV_USE_SELECT
1389 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1390 #endif
1391
1392 for (i = NUMPRI; i--; )
1393 {
1394 array_free (pending, [i]);
1395 #if EV_IDLE_ENABLE
1396 array_free (idle, [i]);
1397 #endif
1398 }
1399
1400 ev_free (anfds); anfdmax = 0;
1401
1402 /* have to use the microsoft-never-gets-it-right macro */
1403 array_free (fdchange, EMPTY);
1404 array_free (timer, EMPTY);
1405 #if EV_PERIODIC_ENABLE
1406 array_free (periodic, EMPTY);
1407 #endif
1408 #if EV_FORK_ENABLE
1409 array_free (fork, EMPTY);
1410 #endif
1411 array_free (prepare, EMPTY);
1412 array_free (check, EMPTY);
1413 #if EV_ASYNC_ENABLE
1414 array_free (async, EMPTY);
1415 #endif
1416
1417 backend = 0;
1418 }
1419
1420 #if EV_USE_INOTIFY
1421 void inline_size infy_fork (EV_P);
1422 #endif
1423
1424 void inline_size
1425 loop_fork (EV_P)
1426 {
1427 #if EV_USE_PORT
1428 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1429 #endif
1430 #if EV_USE_KQUEUE
1431 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1432 #endif
1433 #if EV_USE_EPOLL
1434 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1435 #endif
1436 #if EV_USE_INOTIFY
1437 infy_fork (EV_A);
1438 #endif
1439
1440 if (ev_is_active (&pipeev))
1441 {
1442 /* this "locks" the handlers against writing to the pipe */
1443 /* while we modify the fd vars */
1444 gotsig = 1;
1445 #if EV_ASYNC_ENABLE
1446 gotasync = 1;
1447 #endif
1448
1449 ev_ref (EV_A);
1450 ev_io_stop (EV_A_ &pipeev);
1451
1452 #if EV_USE_EVENTFD
1453 if (evfd >= 0)
1454 close (evfd);
1455 #endif
1456
1457 if (evpipe [0] >= 0)
1458 {
1459 close (evpipe [0]);
1460 close (evpipe [1]);
1461 }
1462
1463 evpipe_init (EV_A);
1464 /* now iterate over everything, in case we missed something */
1465 pipecb (EV_A_ &pipeev, EV_READ);
1466 }
1467
1468 postfork = 0;
1469 }
1470
1471 #if EV_MULTIPLICITY
1472
1473 struct ev_loop *
1474 ev_loop_new (unsigned int flags)
1475 {
1476 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1477
1478 memset (loop, 0, sizeof (struct ev_loop));
1479
1480 loop_init (EV_A_ flags);
1481
1482 if (ev_backend (EV_A))
1483 return loop;
1484
1485 return 0;
1486 }
1487
1488 void
1489 ev_loop_destroy (EV_P)
1490 {
1491 loop_destroy (EV_A);
1492 ev_free (loop);
1493 }
1494
1495 void
1496 ev_loop_fork (EV_P)
1497 {
1498 postfork = 1; /* must be in line with ev_default_fork */
1499 }
1500
1501 #if EV_VERIFY
1502 static void noinline
1503 verify_watcher (EV_P_ W w)
1504 {
1505 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1506
1507 if (w->pending)
1508 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1509 }
1510
1511 static void noinline
1512 verify_heap (EV_P_ ANHE *heap, int N)
1513 {
1514 int i;
1515
1516 for (i = HEAP0; i < N + HEAP0; ++i)
1517 {
1518 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1519 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1520 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1521
1522 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1523 }
1524 }
1525
1526 static void noinline
1527 array_verify (EV_P_ W *ws, int cnt)
1528 {
1529 while (cnt--)
1530 {
1531 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1532 verify_watcher (EV_A_ ws [cnt]);
1533 }
1534 }
1535 #endif
1536
1537 void
1538 ev_loop_verify (EV_P)
1539 {
1540 #if EV_VERIFY
1541 int i;
1542 WL w;
1543
1544 assert (activecnt >= -1);
1545
1546 assert (fdchangemax >= fdchangecnt);
1547 for (i = 0; i < fdchangecnt; ++i)
1548 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1549
1550 assert (anfdmax >= 0);
1551 for (i = 0; i < anfdmax; ++i)
1552 for (w = anfds [i].head; w; w = w->next)
1553 {
1554 verify_watcher (EV_A_ (W)w);
1555 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1556 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1557 }
1558
1559 assert (timermax >= timercnt);
1560 verify_heap (EV_A_ timers, timercnt);
1561
1562 #if EV_PERIODIC_ENABLE
1563 assert (periodicmax >= periodiccnt);
1564 verify_heap (EV_A_ periodics, periodiccnt);
1565 #endif
1566
1567 for (i = NUMPRI; i--; )
1568 {
1569 assert (pendingmax [i] >= pendingcnt [i]);
1570 #if EV_IDLE_ENABLE
1571 assert (idleall >= 0);
1572 assert (idlemax [i] >= idlecnt [i]);
1573 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1574 #endif
1575 }
1576
1577 #if EV_FORK_ENABLE
1578 assert (forkmax >= forkcnt);
1579 array_verify (EV_A_ (W *)forks, forkcnt);
1580 #endif
1581
1582 #if EV_ASYNC_ENABLE
1583 assert (asyncmax >= asynccnt);
1584 array_verify (EV_A_ (W *)asyncs, asynccnt);
1585 #endif
1586
1587 assert (preparemax >= preparecnt);
1588 array_verify (EV_A_ (W *)prepares, preparecnt);
1589
1590 assert (checkmax >= checkcnt);
1591 array_verify (EV_A_ (W *)checks, checkcnt);
1592
1593 # if 0
1594 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1595 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1596 # endif
1597 #endif
1598 }
1599
1600 #endif /* multiplicity */
1601
1602 #if EV_MULTIPLICITY
1603 struct ev_loop *
1604 ev_default_loop_init (unsigned int flags)
1605 #else
1606 int
1607 ev_default_loop (unsigned int flags)
1608 #endif
1609 {
1610 if (!ev_default_loop_ptr)
1611 {
1612 #if EV_MULTIPLICITY
1613 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1614 #else
1615 ev_default_loop_ptr = 1;
1616 #endif
1617
1618 loop_init (EV_A_ flags);
1619
1620 if (ev_backend (EV_A))
1621 {
1622 #ifndef _WIN32
1623 ev_signal_init (&childev, childcb, SIGCHLD);
1624 ev_set_priority (&childev, EV_MAXPRI);
1625 ev_signal_start (EV_A_ &childev);
1626 ev_unref (EV_A); /* child watcher should not keep loop alive */
1627 #endif
1628 }
1629 else
1630 ev_default_loop_ptr = 0;
1631 }
1632
1633 return ev_default_loop_ptr;
1634 }
1635
1636 void
1637 ev_default_destroy (void)
1638 {
1639 #if EV_MULTIPLICITY
1640 struct ev_loop *loop = ev_default_loop_ptr;
1641 #endif
1642
1643 ev_default_loop_ptr = 0;
1644
1645 #ifndef _WIN32
1646 ev_ref (EV_A); /* child watcher */
1647 ev_signal_stop (EV_A_ &childev);
1648 #endif
1649
1650 loop_destroy (EV_A);
1651 }
1652
1653 void
1654 ev_default_fork (void)
1655 {
1656 #if EV_MULTIPLICITY
1657 struct ev_loop *loop = ev_default_loop_ptr;
1658 #endif
1659
1660 if (backend)
1661 postfork = 1; /* must be in line with ev_loop_fork */
1662 }
1663
1664 /*****************************************************************************/
1665
1666 void
1667 ev_invoke (EV_P_ void *w, int revents)
1668 {
1669 EV_CB_INVOKE ((W)w, revents);
1670 }
1671
1672 void inline_speed
1673 call_pending (EV_P)
1674 {
1675 int pri;
1676
1677 for (pri = NUMPRI; pri--; )
1678 while (pendingcnt [pri])
1679 {
1680 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1681
1682 if (expect_true (p->w))
1683 {
1684 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1685
1686 p->w->pending = 0;
1687 EV_CB_INVOKE (p->w, p->events);
1688 EV_FREQUENT_CHECK;
1689 }
1690 }
1691 }
1692
1693 #if EV_IDLE_ENABLE
1694 void inline_size
1695 idle_reify (EV_P)
1696 {
1697 if (expect_false (idleall))
1698 {
1699 int pri;
1700
1701 for (pri = NUMPRI; pri--; )
1702 {
1703 if (pendingcnt [pri])
1704 break;
1705
1706 if (idlecnt [pri])
1707 {
1708 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1709 break;
1710 }
1711 }
1712 }
1713 }
1714 #endif
1715
1716 void inline_size
1717 timers_reify (EV_P)
1718 {
1719 EV_FREQUENT_CHECK;
1720
1721 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1722 {
1723 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1724
1725 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1726
1727 /* first reschedule or stop timer */
1728 if (w->repeat)
1729 {
1730 ev_at (w) += w->repeat;
1731 if (ev_at (w) < mn_now)
1732 ev_at (w) = mn_now;
1733
1734 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1735
1736 ANHE_at_cache (timers [HEAP0]);
1737 downheap (timers, timercnt, HEAP0);
1738 }
1739 else
1740 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1741
1742 EV_FREQUENT_CHECK;
1743 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1744 }
1745 }
1746
1747 #if EV_PERIODIC_ENABLE
1748 void inline_size
1749 periodics_reify (EV_P)
1750 {
1751 EV_FREQUENT_CHECK;
1752
1753 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1754 {
1755 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1756
1757 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1758
1759 /* first reschedule or stop timer */
1760 if (w->reschedule_cb)
1761 {
1762 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1763
1764 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1765
1766 ANHE_at_cache (periodics [HEAP0]);
1767 downheap (periodics, periodiccnt, HEAP0);
1768 }
1769 else if (w->interval)
1770 {
1771 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1772 /* if next trigger time is not sufficiently in the future, put it there */
1773 /* this might happen because of floating point inexactness */
1774 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1775 {
1776 ev_at (w) += w->interval;
1777
1778 /* if interval is unreasonably low we might still have a time in the past */
1779 /* so correct this. this will make the periodic very inexact, but the user */
1780 /* has effectively asked to get triggered more often than possible */
1781 if (ev_at (w) < ev_rt_now)
1782 ev_at (w) = ev_rt_now;
1783 }
1784
1785 ANHE_at_cache (periodics [HEAP0]);
1786 downheap (periodics, periodiccnt, HEAP0);
1787 }
1788 else
1789 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1790
1791 EV_FREQUENT_CHECK;
1792 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1793 }
1794 }
1795
1796 static void noinline
1797 periodics_reschedule (EV_P)
1798 {
1799 int i;
1800
1801 /* adjust periodics after time jump */
1802 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1803 {
1804 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1805
1806 if (w->reschedule_cb)
1807 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1808 else if (w->interval)
1809 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1810
1811 ANHE_at_cache (periodics [i]);
1812 }
1813
1814 reheap (periodics, periodiccnt);
1815 }
1816 #endif
1817
1818 void inline_speed
1819 time_update (EV_P_ ev_tstamp max_block)
1820 {
1821 int i;
1822
1823 #if EV_USE_MONOTONIC
1824 if (expect_true (have_monotonic))
1825 {
1826 ev_tstamp odiff = rtmn_diff;
1827
1828 mn_now = get_clock ();
1829
1830 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1831 /* interpolate in the meantime */
1832 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1833 {
1834 ev_rt_now = rtmn_diff + mn_now;
1835 return;
1836 }
1837
1838 now_floor = mn_now;
1839 ev_rt_now = ev_time ();
1840
1841 /* loop a few times, before making important decisions.
1842 * on the choice of "4": one iteration isn't enough,
1843 * in case we get preempted during the calls to
1844 * ev_time and get_clock. a second call is almost guaranteed
1845 * to succeed in that case, though. and looping a few more times
1846 * doesn't hurt either as we only do this on time-jumps or
1847 * in the unlikely event of having been preempted here.
1848 */
1849 for (i = 4; --i; )
1850 {
1851 rtmn_diff = ev_rt_now - mn_now;
1852
1853 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1854 return; /* all is well */
1855
1856 ev_rt_now = ev_time ();
1857 mn_now = get_clock ();
1858 now_floor = mn_now;
1859 }
1860
1861 # if EV_PERIODIC_ENABLE
1862 periodics_reschedule (EV_A);
1863 # endif
1864 /* no timer adjustment, as the monotonic clock doesn't jump */
1865 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1866 }
1867 else
1868 #endif
1869 {
1870 ev_rt_now = ev_time ();
1871
1872 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1873 {
1874 #if EV_PERIODIC_ENABLE
1875 periodics_reschedule (EV_A);
1876 #endif
1877 /* adjust timers. this is easy, as the offset is the same for all of them */
1878 for (i = 0; i < timercnt; ++i)
1879 {
1880 ANHE *he = timers + i + HEAP0;
1881 ANHE_w (*he)->at += ev_rt_now - mn_now;
1882 ANHE_at_cache (*he);
1883 }
1884 }
1885
1886 mn_now = ev_rt_now;
1887 }
1888 }
1889
1890 void
1891 ev_ref (EV_P)
1892 {
1893 ++activecnt;
1894 }
1895
1896 void
1897 ev_unref (EV_P)
1898 {
1899 --activecnt;
1900 }
1901
1902 void
1903 ev_now_update (EV_P)
1904 {
1905 time_update (EV_A_ 1e100);
1906 }
1907
1908 static int loop_done;
1909
1910 void
1911 ev_loop (EV_P_ int flags)
1912 {
1913 loop_done = EVUNLOOP_CANCEL;
1914
1915 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1916
1917 do
1918 {
1919 #if EV_VERIFY >= 2
1920 ev_loop_verify (EV_A);
1921 #endif
1922
1923 #ifndef _WIN32
1924 if (expect_false (curpid)) /* penalise the forking check even more */
1925 if (expect_false (getpid () != curpid))
1926 {
1927 curpid = getpid ();
1928 postfork = 1;
1929 }
1930 #endif
1931
1932 #if EV_FORK_ENABLE
1933 /* we might have forked, so queue fork handlers */
1934 if (expect_false (postfork))
1935 if (forkcnt)
1936 {
1937 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1938 call_pending (EV_A);
1939 }
1940 #endif
1941
1942 /* queue prepare watchers (and execute them) */
1943 if (expect_false (preparecnt))
1944 {
1945 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1946 call_pending (EV_A);
1947 }
1948
1949 if (expect_false (!activecnt))
1950 break;
1951
1952 /* we might have forked, so reify kernel state if necessary */
1953 if (expect_false (postfork))
1954 loop_fork (EV_A);
1955
1956 /* update fd-related kernel structures */
1957 fd_reify (EV_A);
1958
1959 /* calculate blocking time */
1960 {
1961 ev_tstamp waittime = 0.;
1962 ev_tstamp sleeptime = 0.;
1963
1964 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1965 {
1966 /* update time to cancel out callback processing overhead */
1967 time_update (EV_A_ 1e100);
1968
1969 waittime = MAX_BLOCKTIME;
1970
1971 if (timercnt)
1972 {
1973 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1974 if (waittime > to) waittime = to;
1975 }
1976
1977 #if EV_PERIODIC_ENABLE
1978 if (periodiccnt)
1979 {
1980 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1981 if (waittime > to) waittime = to;
1982 }
1983 #endif
1984
1985 if (expect_false (waittime < timeout_blocktime))
1986 waittime = timeout_blocktime;
1987
1988 sleeptime = waittime - backend_fudge;
1989
1990 if (expect_true (sleeptime > io_blocktime))
1991 sleeptime = io_blocktime;
1992
1993 if (sleeptime)
1994 {
1995 ev_sleep (sleeptime);
1996 waittime -= sleeptime;
1997 }
1998 }
1999
2000 ++loop_count;
2001 backend_poll (EV_A_ waittime);
2002
2003 /* update ev_rt_now, do magic */
2004 time_update (EV_A_ waittime + sleeptime);
2005 }
2006
2007 /* queue pending timers and reschedule them */
2008 timers_reify (EV_A); /* relative timers called last */
2009 #if EV_PERIODIC_ENABLE
2010 periodics_reify (EV_A); /* absolute timers called first */
2011 #endif
2012
2013 #if EV_IDLE_ENABLE
2014 /* queue idle watchers unless other events are pending */
2015 idle_reify (EV_A);
2016 #endif
2017
2018 /* queue check watchers, to be executed first */
2019 if (expect_false (checkcnt))
2020 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2021
2022 call_pending (EV_A);
2023 }
2024 while (expect_true (
2025 activecnt
2026 && !loop_done
2027 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2028 ));
2029
2030 if (loop_done == EVUNLOOP_ONE)
2031 loop_done = EVUNLOOP_CANCEL;
2032 }
2033
2034 void
2035 ev_unloop (EV_P_ int how)
2036 {
2037 loop_done = how;
2038 }
2039
2040 /*****************************************************************************/
2041
2042 void inline_size
2043 wlist_add (WL *head, WL elem)
2044 {
2045 elem->next = *head;
2046 *head = elem;
2047 }
2048
2049 void inline_size
2050 wlist_del (WL *head, WL elem)
2051 {
2052 while (*head)
2053 {
2054 if (*head == elem)
2055 {
2056 *head = elem->next;
2057 return;
2058 }
2059
2060 head = &(*head)->next;
2061 }
2062 }
2063
2064 void inline_speed
2065 clear_pending (EV_P_ W w)
2066 {
2067 if (w->pending)
2068 {
2069 pendings [ABSPRI (w)][w->pending - 1].w = 0;
2070 w->pending = 0;
2071 }
2072 }
2073
2074 int
2075 ev_clear_pending (EV_P_ void *w)
2076 {
2077 W w_ = (W)w;
2078 int pending = w_->pending;
2079
2080 if (expect_true (pending))
2081 {
2082 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2083 w_->pending = 0;
2084 p->w = 0;
2085 return p->events;
2086 }
2087 else
2088 return 0;
2089 }
2090
2091 void inline_size
2092 pri_adjust (EV_P_ W w)
2093 {
2094 int pri = w->priority;
2095 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2096 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2097 w->priority = pri;
2098 }
2099
2100 void inline_speed
2101 ev_start (EV_P_ W w, int active)
2102 {
2103 pri_adjust (EV_A_ w);
2104 w->active = active;
2105 ev_ref (EV_A);
2106 }
2107
2108 void inline_size
2109 ev_stop (EV_P_ W w)
2110 {
2111 ev_unref (EV_A);
2112 w->active = 0;
2113 }
2114
2115 /*****************************************************************************/
2116
2117 void noinline
2118 ev_io_start (EV_P_ ev_io *w)
2119 {
2120 int fd = w->fd;
2121
2122 if (expect_false (ev_is_active (w)))
2123 return;
2124
2125 assert (("ev_io_start called with negative fd", fd >= 0));
2126 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2127
2128 EV_FREQUENT_CHECK;
2129
2130 ev_start (EV_A_ (W)w, 1);
2131 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2132 wlist_add (&anfds[fd].head, (WL)w);
2133
2134 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2135 w->events &= ~EV_IOFDSET;
2136
2137 EV_FREQUENT_CHECK;
2138 }
2139
2140 void noinline
2141 ev_io_stop (EV_P_ ev_io *w)
2142 {
2143 clear_pending (EV_A_ (W)w);
2144 if (expect_false (!ev_is_active (w)))
2145 return;
2146
2147 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2148
2149 EV_FREQUENT_CHECK;
2150
2151 wlist_del (&anfds[w->fd].head, (WL)w);
2152 ev_stop (EV_A_ (W)w);
2153
2154 fd_change (EV_A_ w->fd, 1);
2155
2156 EV_FREQUENT_CHECK;
2157 }
2158
2159 void noinline
2160 ev_timer_start (EV_P_ ev_timer *w)
2161 {
2162 if (expect_false (ev_is_active (w)))
2163 return;
2164
2165 ev_at (w) += mn_now;
2166
2167 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2168
2169 EV_FREQUENT_CHECK;
2170
2171 ++timercnt;
2172 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2173 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2174 ANHE_w (timers [ev_active (w)]) = (WT)w;
2175 ANHE_at_cache (timers [ev_active (w)]);
2176 upheap (timers, ev_active (w));
2177
2178 EV_FREQUENT_CHECK;
2179
2180 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2181 }
2182
2183 void noinline
2184 ev_timer_stop (EV_P_ ev_timer *w)
2185 {
2186 clear_pending (EV_A_ (W)w);
2187 if (expect_false (!ev_is_active (w)))
2188 return;
2189
2190 EV_FREQUENT_CHECK;
2191
2192 {
2193 int active = ev_active (w);
2194
2195 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2196
2197 --timercnt;
2198
2199 if (expect_true (active < timercnt + HEAP0))
2200 {
2201 timers [active] = timers [timercnt + HEAP0];
2202 adjustheap (timers, timercnt, active);
2203 }
2204 }
2205
2206 EV_FREQUENT_CHECK;
2207
2208 ev_at (w) -= mn_now;
2209
2210 ev_stop (EV_A_ (W)w);
2211 }
2212
2213 void noinline
2214 ev_timer_again (EV_P_ ev_timer *w)
2215 {
2216 EV_FREQUENT_CHECK;
2217
2218 if (ev_is_active (w))
2219 {
2220 if (w->repeat)
2221 {
2222 ev_at (w) = mn_now + w->repeat;
2223 ANHE_at_cache (timers [ev_active (w)]);
2224 adjustheap (timers, timercnt, ev_active (w));
2225 }
2226 else
2227 ev_timer_stop (EV_A_ w);
2228 }
2229 else if (w->repeat)
2230 {
2231 ev_at (w) = w->repeat;
2232 ev_timer_start (EV_A_ w);
2233 }
2234
2235 EV_FREQUENT_CHECK;
2236 }
2237
2238 #if EV_PERIODIC_ENABLE
2239 void noinline
2240 ev_periodic_start (EV_P_ ev_periodic *w)
2241 {
2242 if (expect_false (ev_is_active (w)))
2243 return;
2244
2245 if (w->reschedule_cb)
2246 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2247 else if (w->interval)
2248 {
2249 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
2250 /* this formula differs from the one in periodic_reify because we do not always round up */
2251 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2252 }
2253 else
2254 ev_at (w) = w->offset;
2255
2256 EV_FREQUENT_CHECK;
2257
2258 ++periodiccnt;
2259 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2260 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2261 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2262 ANHE_at_cache (periodics [ev_active (w)]);
2263 upheap (periodics, ev_active (w));
2264
2265 EV_FREQUENT_CHECK;
2266
2267 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2268 }
2269
2270 void noinline
2271 ev_periodic_stop (EV_P_ ev_periodic *w)
2272 {
2273 clear_pending (EV_A_ (W)w);
2274 if (expect_false (!ev_is_active (w)))
2275 return;
2276
2277 EV_FREQUENT_CHECK;
2278
2279 {
2280 int active = ev_active (w);
2281
2282 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2283
2284 --periodiccnt;
2285
2286 if (expect_true (active < periodiccnt + HEAP0))
2287 {
2288 periodics [active] = periodics [periodiccnt + HEAP0];
2289 adjustheap (periodics, periodiccnt, active);
2290 }
2291 }
2292
2293 EV_FREQUENT_CHECK;
2294
2295 ev_stop (EV_A_ (W)w);
2296 }
2297
2298 void noinline
2299 ev_periodic_again (EV_P_ ev_periodic *w)
2300 {
2301 /* TODO: use adjustheap and recalculation */
2302 ev_periodic_stop (EV_A_ w);
2303 ev_periodic_start (EV_A_ w);
2304 }
2305 #endif
2306
2307 #ifndef SA_RESTART
2308 # define SA_RESTART 0
2309 #endif
2310
2311 void noinline
2312 ev_signal_start (EV_P_ ev_signal *w)
2313 {
2314 #if EV_MULTIPLICITY
2315 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2316 #endif
2317 if (expect_false (ev_is_active (w)))
2318 return;
2319
2320 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2321
2322 evpipe_init (EV_A);
2323
2324 EV_FREQUENT_CHECK;
2325
2326 {
2327 #ifndef _WIN32
2328 sigset_t full, prev;
2329 sigfillset (&full);
2330 sigprocmask (SIG_SETMASK, &full, &prev);
2331 #endif
2332
2333 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2334
2335 #ifndef _WIN32
2336 sigprocmask (SIG_SETMASK, &prev, 0);
2337 #endif
2338 }
2339
2340 ev_start (EV_A_ (W)w, 1);
2341 wlist_add (&signals [w->signum - 1].head, (WL)w);
2342
2343 if (!((WL)w)->next)
2344 {
2345 #if _WIN32
2346 signal (w->signum, ev_sighandler);
2347 #else
2348 struct sigaction sa;
2349 sa.sa_handler = ev_sighandler;
2350 sigfillset (&sa.sa_mask);
2351 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2352 sigaction (w->signum, &sa, 0);
2353 #endif
2354 }
2355
2356 EV_FREQUENT_CHECK;
2357 }
2358
2359 void noinline
2360 ev_signal_stop (EV_P_ ev_signal *w)
2361 {
2362 clear_pending (EV_A_ (W)w);
2363 if (expect_false (!ev_is_active (w)))
2364 return;
2365
2366 EV_FREQUENT_CHECK;
2367
2368 wlist_del (&signals [w->signum - 1].head, (WL)w);
2369 ev_stop (EV_A_ (W)w);
2370
2371 if (!signals [w->signum - 1].head)
2372 signal (w->signum, SIG_DFL);
2373
2374 EV_FREQUENT_CHECK;
2375 }
2376
2377 void
2378 ev_child_start (EV_P_ ev_child *w)
2379 {
2380 #if EV_MULTIPLICITY
2381 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2382 #endif
2383 if (expect_false (ev_is_active (w)))
2384 return;
2385
2386 EV_FREQUENT_CHECK;
2387
2388 ev_start (EV_A_ (W)w, 1);
2389 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2390
2391 EV_FREQUENT_CHECK;
2392 }
2393
2394 void
2395 ev_child_stop (EV_P_ ev_child *w)
2396 {
2397 clear_pending (EV_A_ (W)w);
2398 if (expect_false (!ev_is_active (w)))
2399 return;
2400
2401 EV_FREQUENT_CHECK;
2402
2403 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2404 ev_stop (EV_A_ (W)w);
2405
2406 EV_FREQUENT_CHECK;
2407 }
2408
2409 #if EV_STAT_ENABLE
2410
2411 # ifdef _WIN32
2412 # undef lstat
2413 # define lstat(a,b) _stati64 (a,b)
2414 # endif
2415
2416 #define DEF_STAT_INTERVAL 5.0074891
2417 #define MIN_STAT_INTERVAL 0.1074891
2418
2419 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2420
2421 #if EV_USE_INOTIFY
2422 # define EV_INOTIFY_BUFSIZE 8192
2423
2424 static void noinline
2425 infy_add (EV_P_ ev_stat *w)
2426 {
2427 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2428
2429 if (w->wd < 0)
2430 {
2431 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2432
2433 /* monitor some parent directory for speedup hints */
2434 /* note that exceeding the hardcoded limit is not a correctness issue, */
2435 /* but an efficiency issue only */
2436 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2437 {
2438 char path [4096];
2439 strcpy (path, w->path);
2440
2441 do
2442 {
2443 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2444 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2445
2446 char *pend = strrchr (path, '/');
2447
2448 if (!pend)
2449 break; /* whoops, no '/', complain to your admin */
2450
2451 *pend = 0;
2452 w->wd = inotify_add_watch (fs_fd, path, mask);
2453 }
2454 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2455 }
2456 }
2457 else
2458 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2459
2460 if (w->wd >= 0)
2461 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2462 }
2463
2464 static void noinline
2465 infy_del (EV_P_ ev_stat *w)
2466 {
2467 int slot;
2468 int wd = w->wd;
2469
2470 if (wd < 0)
2471 return;
2472
2473 w->wd = -2;
2474 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2475 wlist_del (&fs_hash [slot].head, (WL)w);
2476
2477 /* remove this watcher, if others are watching it, they will rearm */
2478 inotify_rm_watch (fs_fd, wd);
2479 }
2480
2481 static void noinline
2482 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2483 {
2484 if (slot < 0)
2485 /* overflow, need to check for all hash slots */
2486 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2487 infy_wd (EV_A_ slot, wd, ev);
2488 else
2489 {
2490 WL w_;
2491
2492 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2493 {
2494 ev_stat *w = (ev_stat *)w_;
2495 w_ = w_->next; /* lets us remove this watcher and all before it */
2496
2497 if (w->wd == wd || wd == -1)
2498 {
2499 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2500 {
2501 w->wd = -1;
2502 infy_add (EV_A_ w); /* re-add, no matter what */
2503 }
2504
2505 stat_timer_cb (EV_A_ &w->timer, 0);
2506 }
2507 }
2508 }
2509 }
2510
2511 static void
2512 infy_cb (EV_P_ ev_io *w, int revents)
2513 {
2514 char buf [EV_INOTIFY_BUFSIZE];
2515 struct inotify_event *ev = (struct inotify_event *)buf;
2516 int ofs;
2517 int len = read (fs_fd, buf, sizeof (buf));
2518
2519 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2520 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2521 }
2522
2523 void inline_size
2524 infy_init (EV_P)
2525 {
2526 if (fs_fd != -2)
2527 return;
2528
2529 /* kernels < 2.6.25 are borked
2530 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2531 */
2532 {
2533 struct utsname buf;
2534 int major, minor, micro;
2535
2536 fs_fd = -1;
2537
2538 if (uname (&buf))
2539 return;
2540
2541 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2542 return;
2543
2544 if (major < 2
2545 || (major == 2 && minor < 6)
2546 || (major == 2 && minor == 6 && micro < 25))
2547 return;
2548 }
2549
2550 fs_fd = inotify_init ();
2551
2552 if (fs_fd >= 0)
2553 {
2554 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2555 ev_set_priority (&fs_w, EV_MAXPRI);
2556 ev_io_start (EV_A_ &fs_w);
2557 }
2558 }
2559
2560 void inline_size
2561 infy_fork (EV_P)
2562 {
2563 int slot;
2564
2565 if (fs_fd < 0)
2566 return;
2567
2568 close (fs_fd);
2569 fs_fd = inotify_init ();
2570
2571 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2572 {
2573 WL w_ = fs_hash [slot].head;
2574 fs_hash [slot].head = 0;
2575
2576 while (w_)
2577 {
2578 ev_stat *w = (ev_stat *)w_;
2579 w_ = w_->next; /* lets us add this watcher */
2580
2581 w->wd = -1;
2582
2583 if (fs_fd >= 0)
2584 infy_add (EV_A_ w); /* re-add, no matter what */
2585 else
2586 ev_timer_start (EV_A_ &w->timer);
2587 }
2588 }
2589 }
2590
2591 #endif
2592
2593 #ifdef _WIN32
2594 # define EV_LSTAT(p,b) _stati64 (p, b)
2595 #else
2596 # define EV_LSTAT(p,b) lstat (p, b)
2597 #endif
2598
2599 void
2600 ev_stat_stat (EV_P_ ev_stat *w)
2601 {
2602 if (lstat (w->path, &w->attr) < 0)
2603 w->attr.st_nlink = 0;
2604 else if (!w->attr.st_nlink)
2605 w->attr.st_nlink = 1;
2606 }
2607
2608 static void noinline
2609 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2610 {
2611 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2612
2613 /* we copy this here each the time so that */
2614 /* prev has the old value when the callback gets invoked */
2615 w->prev = w->attr;
2616 ev_stat_stat (EV_A_ w);
2617
2618 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2619 if (
2620 w->prev.st_dev != w->attr.st_dev
2621 || w->prev.st_ino != w->attr.st_ino
2622 || w->prev.st_mode != w->attr.st_mode
2623 || w->prev.st_nlink != w->attr.st_nlink
2624 || w->prev.st_uid != w->attr.st_uid
2625 || w->prev.st_gid != w->attr.st_gid
2626 || w->prev.st_rdev != w->attr.st_rdev
2627 || w->prev.st_size != w->attr.st_size
2628 || w->prev.st_atime != w->attr.st_atime
2629 || w->prev.st_mtime != w->attr.st_mtime
2630 || w->prev.st_ctime != w->attr.st_ctime
2631 ) {
2632 #if EV_USE_INOTIFY
2633 if (fs_fd >= 0)
2634 {
2635 infy_del (EV_A_ w);
2636 infy_add (EV_A_ w);
2637 ev_stat_stat (EV_A_ w); /* avoid race... */
2638 }
2639 #endif
2640
2641 ev_feed_event (EV_A_ w, EV_STAT);
2642 }
2643 }
2644
2645 void
2646 ev_stat_start (EV_P_ ev_stat *w)
2647 {
2648 if (expect_false (ev_is_active (w)))
2649 return;
2650
2651 /* since we use memcmp, we need to clear any padding data etc. */
2652 memset (&w->prev, 0, sizeof (ev_statdata));
2653 memset (&w->attr, 0, sizeof (ev_statdata));
2654
2655 ev_stat_stat (EV_A_ w);
2656
2657 if (w->interval < MIN_STAT_INTERVAL)
2658 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2659
2660 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2661 ev_set_priority (&w->timer, ev_priority (w));
2662
2663 #if EV_USE_INOTIFY
2664 infy_init (EV_A);
2665
2666 if (fs_fd >= 0)
2667 infy_add (EV_A_ w);
2668 else
2669 #endif
2670 ev_timer_start (EV_A_ &w->timer);
2671
2672 ev_start (EV_A_ (W)w, 1);
2673
2674 EV_FREQUENT_CHECK;
2675 }
2676
2677 void
2678 ev_stat_stop (EV_P_ ev_stat *w)
2679 {
2680 clear_pending (EV_A_ (W)w);
2681 if (expect_false (!ev_is_active (w)))
2682 return;
2683
2684 EV_FREQUENT_CHECK;
2685
2686 #if EV_USE_INOTIFY
2687 infy_del (EV_A_ w);
2688 #endif
2689 ev_timer_stop (EV_A_ &w->timer);
2690
2691 ev_stop (EV_A_ (W)w);
2692
2693 EV_FREQUENT_CHECK;
2694 }
2695 #endif
2696
2697 #if EV_IDLE_ENABLE
2698 void
2699 ev_idle_start (EV_P_ ev_idle *w)
2700 {
2701 if (expect_false (ev_is_active (w)))
2702 return;
2703
2704 pri_adjust (EV_A_ (W)w);
2705
2706 EV_FREQUENT_CHECK;
2707
2708 {
2709 int active = ++idlecnt [ABSPRI (w)];
2710
2711 ++idleall;
2712 ev_start (EV_A_ (W)w, active);
2713
2714 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2715 idles [ABSPRI (w)][active - 1] = w;
2716 }
2717
2718 EV_FREQUENT_CHECK;
2719 }
2720
2721 void
2722 ev_idle_stop (EV_P_ ev_idle *w)
2723 {
2724 clear_pending (EV_A_ (W)w);
2725 if (expect_false (!ev_is_active (w)))
2726 return;
2727
2728 EV_FREQUENT_CHECK;
2729
2730 {
2731 int active = ev_active (w);
2732
2733 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2734 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2735
2736 ev_stop (EV_A_ (W)w);
2737 --idleall;
2738 }
2739
2740 EV_FREQUENT_CHECK;
2741 }
2742 #endif
2743
2744 void
2745 ev_prepare_start (EV_P_ ev_prepare *w)
2746 {
2747 if (expect_false (ev_is_active (w)))
2748 return;
2749
2750 EV_FREQUENT_CHECK;
2751
2752 ev_start (EV_A_ (W)w, ++preparecnt);
2753 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2754 prepares [preparecnt - 1] = w;
2755
2756 EV_FREQUENT_CHECK;
2757 }
2758
2759 void
2760 ev_prepare_stop (EV_P_ ev_prepare *w)
2761 {
2762 clear_pending (EV_A_ (W)w);
2763 if (expect_false (!ev_is_active (w)))
2764 return;
2765
2766 EV_FREQUENT_CHECK;
2767
2768 {
2769 int active = ev_active (w);
2770
2771 prepares [active - 1] = prepares [--preparecnt];
2772 ev_active (prepares [active - 1]) = active;
2773 }
2774
2775 ev_stop (EV_A_ (W)w);
2776
2777 EV_FREQUENT_CHECK;
2778 }
2779
2780 void
2781 ev_check_start (EV_P_ ev_check *w)
2782 {
2783 if (expect_false (ev_is_active (w)))
2784 return;
2785
2786 EV_FREQUENT_CHECK;
2787
2788 ev_start (EV_A_ (W)w, ++checkcnt);
2789 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2790 checks [checkcnt - 1] = w;
2791
2792 EV_FREQUENT_CHECK;
2793 }
2794
2795 void
2796 ev_check_stop (EV_P_ ev_check *w)
2797 {
2798 clear_pending (EV_A_ (W)w);
2799 if (expect_false (!ev_is_active (w)))
2800 return;
2801
2802 EV_FREQUENT_CHECK;
2803
2804 {
2805 int active = ev_active (w);
2806
2807 checks [active - 1] = checks [--checkcnt];
2808 ev_active (checks [active - 1]) = active;
2809 }
2810
2811 ev_stop (EV_A_ (W)w);
2812
2813 EV_FREQUENT_CHECK;
2814 }
2815
2816 #if EV_EMBED_ENABLE
2817 void noinline
2818 ev_embed_sweep (EV_P_ ev_embed *w)
2819 {
2820 ev_loop (w->other, EVLOOP_NONBLOCK);
2821 }
2822
2823 static void
2824 embed_io_cb (EV_P_ ev_io *io, int revents)
2825 {
2826 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2827
2828 if (ev_cb (w))
2829 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2830 else
2831 ev_loop (w->other, EVLOOP_NONBLOCK);
2832 }
2833
2834 static void
2835 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2836 {
2837 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2838
2839 {
2840 struct ev_loop *loop = w->other;
2841
2842 while (fdchangecnt)
2843 {
2844 fd_reify (EV_A);
2845 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2846 }
2847 }
2848 }
2849
2850 static void
2851 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2852 {
2853 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2854
2855 {
2856 struct ev_loop *loop = w->other;
2857
2858 ev_loop_fork (EV_A);
2859 }
2860 }
2861
2862 #if 0
2863 static void
2864 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2865 {
2866 ev_idle_stop (EV_A_ idle);
2867 }
2868 #endif
2869
2870 void
2871 ev_embed_start (EV_P_ ev_embed *w)
2872 {
2873 if (expect_false (ev_is_active (w)))
2874 return;
2875
2876 {
2877 struct ev_loop *loop = w->other;
2878 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2879 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2880 }
2881
2882 EV_FREQUENT_CHECK;
2883
2884 ev_set_priority (&w->io, ev_priority (w));
2885 ev_io_start (EV_A_ &w->io);
2886
2887 ev_prepare_init (&w->prepare, embed_prepare_cb);
2888 ev_set_priority (&w->prepare, EV_MINPRI);
2889 ev_prepare_start (EV_A_ &w->prepare);
2890
2891 ev_fork_init (&w->fork, embed_fork_cb);
2892 ev_fork_start (EV_A_ &w->fork);
2893
2894 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2895
2896 ev_start (EV_A_ (W)w, 1);
2897
2898 EV_FREQUENT_CHECK;
2899 }
2900
2901 void
2902 ev_embed_stop (EV_P_ ev_embed *w)
2903 {
2904 clear_pending (EV_A_ (W)w);
2905 if (expect_false (!ev_is_active (w)))
2906 return;
2907
2908 EV_FREQUENT_CHECK;
2909
2910 ev_io_stop (EV_A_ &w->io);
2911 ev_prepare_stop (EV_A_ &w->prepare);
2912 ev_fork_stop (EV_A_ &w->fork);
2913
2914 EV_FREQUENT_CHECK;
2915 }
2916 #endif
2917
2918 #if EV_FORK_ENABLE
2919 void
2920 ev_fork_start (EV_P_ ev_fork *w)
2921 {
2922 if (expect_false (ev_is_active (w)))
2923 return;
2924
2925 EV_FREQUENT_CHECK;
2926
2927 ev_start (EV_A_ (W)w, ++forkcnt);
2928 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2929 forks [forkcnt - 1] = w;
2930
2931 EV_FREQUENT_CHECK;
2932 }
2933
2934 void
2935 ev_fork_stop (EV_P_ ev_fork *w)
2936 {
2937 clear_pending (EV_A_ (W)w);
2938 if (expect_false (!ev_is_active (w)))
2939 return;
2940
2941 EV_FREQUENT_CHECK;
2942
2943 {
2944 int active = ev_active (w);
2945
2946 forks [active - 1] = forks [--forkcnt];
2947 ev_active (forks [active - 1]) = active;
2948 }
2949
2950 ev_stop (EV_A_ (W)w);
2951
2952 EV_FREQUENT_CHECK;
2953 }
2954 #endif
2955
2956 #if EV_ASYNC_ENABLE
2957 void
2958 ev_async_start (EV_P_ ev_async *w)
2959 {
2960 if (expect_false (ev_is_active (w)))
2961 return;
2962
2963 evpipe_init (EV_A);
2964
2965 EV_FREQUENT_CHECK;
2966
2967 ev_start (EV_A_ (W)w, ++asynccnt);
2968 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2969 asyncs [asynccnt - 1] = w;
2970
2971 EV_FREQUENT_CHECK;
2972 }
2973
2974 void
2975 ev_async_stop (EV_P_ ev_async *w)
2976 {
2977 clear_pending (EV_A_ (W)w);
2978 if (expect_false (!ev_is_active (w)))
2979 return;
2980
2981 EV_FREQUENT_CHECK;
2982
2983 {
2984 int active = ev_active (w);
2985
2986 asyncs [active - 1] = asyncs [--asynccnt];
2987 ev_active (asyncs [active - 1]) = active;
2988 }
2989
2990 ev_stop (EV_A_ (W)w);
2991
2992 EV_FREQUENT_CHECK;
2993 }
2994
2995 void
2996 ev_async_send (EV_P_ ev_async *w)
2997 {
2998 w->sent = 1;
2999 evpipe_write (EV_A_ &gotasync);
3000 }
3001 #endif
3002
3003 /*****************************************************************************/
3004
3005 struct ev_once
3006 {
3007 ev_io io;
3008 ev_timer to;
3009 void (*cb)(int revents, void *arg);
3010 void *arg;
3011 };
3012
3013 static void
3014 once_cb (EV_P_ struct ev_once *once, int revents)
3015 {
3016 void (*cb)(int revents, void *arg) = once->cb;
3017 void *arg = once->arg;
3018
3019 ev_io_stop (EV_A_ &once->io);
3020 ev_timer_stop (EV_A_ &once->to);
3021 ev_free (once);
3022
3023 cb (revents, arg);
3024 }
3025
3026 static void
3027 once_cb_io (EV_P_ ev_io *w, int revents)
3028 {
3029 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3030
3031 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3032 }
3033
3034 static void
3035 once_cb_to (EV_P_ ev_timer *w, int revents)
3036 {
3037 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3038
3039 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3040 }
3041
3042 void
3043 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3044 {
3045 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3046
3047 if (expect_false (!once))
3048 {
3049 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3050 return;
3051 }
3052
3053 once->cb = cb;
3054 once->arg = arg;
3055
3056 ev_init (&once->io, once_cb_io);
3057 if (fd >= 0)
3058 {
3059 ev_io_set (&once->io, fd, events);
3060 ev_io_start (EV_A_ &once->io);
3061 }
3062
3063 ev_init (&once->to, once_cb_to);
3064 if (timeout >= 0.)
3065 {
3066 ev_timer_set (&once->to, timeout, 0.);
3067 ev_timer_start (EV_A_ &once->to);
3068 }
3069 }
3070
3071 #if EV_MULTIPLICITY
3072 #include "ev_wrap.h"
3073 #endif
3074
3075 #ifdef __cplusplus
3076 }
3077 #endif
3078