ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
Revision: 1.206
Committed: Fri Jan 25 15:45:08 2008 UTC (16 years, 5 months ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: rel-3_0
Changes since 1.205: +15 -7 lines
Log Message:
*** empty log message ***

File Contents

# Content
1 /*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007 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 #ifndef EV_STANDALONE
45 # ifdef EV_CONFIG_H
46 # include EV_CONFIG_H
47 # else
48 # include "config.h"
49 # endif
50
51 # if HAVE_CLOCK_GETTIME
52 # ifndef EV_USE_MONOTONIC
53 # define EV_USE_MONOTONIC 1
54 # endif
55 # ifndef EV_USE_REALTIME
56 # define EV_USE_REALTIME 1
57 # endif
58 # else
59 # ifndef EV_USE_MONOTONIC
60 # define EV_USE_MONOTONIC 0
61 # endif
62 # ifndef EV_USE_REALTIME
63 # define EV_USE_REALTIME 0
64 # endif
65 # endif
66
67 # ifndef EV_USE_NANOSLEEP
68 # if HAVE_NANOSLEEP
69 # define EV_USE_NANOSLEEP 1
70 # else
71 # define EV_USE_NANOSLEEP 0
72 # endif
73 # endif
74
75 # ifndef EV_USE_SELECT
76 # if HAVE_SELECT && HAVE_SYS_SELECT_H
77 # define EV_USE_SELECT 1
78 # else
79 # define EV_USE_SELECT 0
80 # endif
81 # endif
82
83 # ifndef EV_USE_POLL
84 # if HAVE_POLL && HAVE_POLL_H
85 # define EV_USE_POLL 1
86 # else
87 # define EV_USE_POLL 0
88 # endif
89 # endif
90
91 # ifndef EV_USE_EPOLL
92 # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
93 # define EV_USE_EPOLL 1
94 # else
95 # define EV_USE_EPOLL 0
96 # endif
97 # endif
98
99 # ifndef EV_USE_KQUEUE
100 # if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
101 # define EV_USE_KQUEUE 1
102 # else
103 # define EV_USE_KQUEUE 0
104 # endif
105 # endif
106
107 # ifndef EV_USE_PORT
108 # if HAVE_PORT_H && HAVE_PORT_CREATE
109 # define EV_USE_PORT 1
110 # else
111 # define EV_USE_PORT 0
112 # endif
113 # endif
114
115 # ifndef EV_USE_INOTIFY
116 # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
117 # define EV_USE_INOTIFY 1
118 # else
119 # define EV_USE_INOTIFY 0
120 # endif
121 # endif
122
123 #endif
124
125 #include <math.h>
126 #include <stdlib.h>
127 #include <fcntl.h>
128 #include <stddef.h>
129
130 #include <stdio.h>
131
132 #include <assert.h>
133 #include <errno.h>
134 #include <sys/types.h>
135 #include <time.h>
136
137 #include <signal.h>
138
139 #ifdef EV_H
140 # include EV_H
141 #else
142 # include "ev.h"
143 #endif
144
145 #ifndef _WIN32
146 # include <sys/time.h>
147 # include <sys/wait.h>
148 # include <unistd.h>
149 #else
150 # define WIN32_LEAN_AND_MEAN
151 # include <windows.h>
152 # ifndef EV_SELECT_IS_WINSOCKET
153 # define EV_SELECT_IS_WINSOCKET 1
154 # endif
155 #endif
156
157 /**/
158
159 #ifndef EV_USE_MONOTONIC
160 # define EV_USE_MONOTONIC 0
161 #endif
162
163 #ifndef EV_USE_REALTIME
164 # define EV_USE_REALTIME 0
165 #endif
166
167 #ifndef EV_USE_NANOSLEEP
168 # define EV_USE_NANOSLEEP 0
169 #endif
170
171 #ifndef EV_USE_SELECT
172 # define EV_USE_SELECT 1
173 #endif
174
175 #ifndef EV_USE_POLL
176 # ifdef _WIN32
177 # define EV_USE_POLL 0
178 # else
179 # define EV_USE_POLL 1
180 # endif
181 #endif
182
183 #ifndef EV_USE_EPOLL
184 # define EV_USE_EPOLL 0
185 #endif
186
187 #ifndef EV_USE_KQUEUE
188 # define EV_USE_KQUEUE 0
189 #endif
190
191 #ifndef EV_USE_PORT
192 # define EV_USE_PORT 0
193 #endif
194
195 #ifndef EV_USE_INOTIFY
196 # define EV_USE_INOTIFY 0
197 #endif
198
199 #ifndef EV_PID_HASHSIZE
200 # if EV_MINIMAL
201 # define EV_PID_HASHSIZE 1
202 # else
203 # define EV_PID_HASHSIZE 16
204 # endif
205 #endif
206
207 #ifndef EV_INOTIFY_HASHSIZE
208 # if EV_MINIMAL
209 # define EV_INOTIFY_HASHSIZE 1
210 # else
211 # define EV_INOTIFY_HASHSIZE 16
212 # endif
213 #endif
214
215 /**/
216
217 #ifndef CLOCK_MONOTONIC
218 # undef EV_USE_MONOTONIC
219 # define EV_USE_MONOTONIC 0
220 #endif
221
222 #ifndef CLOCK_REALTIME
223 # undef EV_USE_REALTIME
224 # define EV_USE_REALTIME 0
225 #endif
226
227 #if !EV_STAT_ENABLE
228 # undef EV_USE_INOTIFY
229 # define EV_USE_INOTIFY 0
230 #endif
231
232 #if !EV_USE_NANOSLEEP
233 # ifndef _WIN32
234 # include <sys/select.h>
235 # endif
236 #endif
237
238 #if EV_USE_INOTIFY
239 # include <sys/inotify.h>
240 #endif
241
242 #if EV_SELECT_IS_WINSOCKET
243 # include <winsock.h>
244 #endif
245
246 /**/
247
248 /*
249 * This is used to avoid floating point rounding problems.
250 * It is added to ev_rt_now when scheduling periodics
251 * to ensure progress, time-wise, even when rounding
252 * errors are against us.
253 * This value is good at least till the year 4000.
254 * Better solutions welcome.
255 */
256 #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
257
258 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
259 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
260 /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
261
262 #if __GNUC__ >= 4
263 # define expect(expr,value) __builtin_expect ((expr),(value))
264 # define noinline __attribute__ ((noinline))
265 #else
266 # define expect(expr,value) (expr)
267 # define noinline
268 # if __STDC_VERSION__ < 199901L
269 # define inline
270 # endif
271 #endif
272
273 #define expect_false(expr) expect ((expr) != 0, 0)
274 #define expect_true(expr) expect ((expr) != 0, 1)
275 #define inline_size static inline
276
277 #if EV_MINIMAL
278 # define inline_speed static noinline
279 #else
280 # define inline_speed static inline
281 #endif
282
283 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
284 #define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
285
286 #define EMPTY /* required for microsofts broken pseudo-c compiler */
287 #define EMPTY2(a,b) /* used to suppress some warnings */
288
289 typedef ev_watcher *W;
290 typedef ev_watcher_list *WL;
291 typedef ev_watcher_time *WT;
292
293 #if EV_USE_MONOTONIC
294 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
295 /* giving it a reasonably high chance of working on typical architetcures */
296 static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
297 #endif
298
299 #ifdef _WIN32
300 # include "ev_win32.c"
301 #endif
302
303 /*****************************************************************************/
304
305 static void (*syserr_cb)(const char *msg);
306
307 void
308 ev_set_syserr_cb (void (*cb)(const char *msg))
309 {
310 syserr_cb = cb;
311 }
312
313 static void noinline
314 syserr (const char *msg)
315 {
316 if (!msg)
317 msg = "(libev) system error";
318
319 if (syserr_cb)
320 syserr_cb (msg);
321 else
322 {
323 perror (msg);
324 abort ();
325 }
326 }
327
328 static void *(*alloc)(void *ptr, long size);
329
330 void
331 ev_set_allocator (void *(*cb)(void *ptr, long size))
332 {
333 alloc = cb;
334 }
335
336 inline_speed void *
337 ev_realloc (void *ptr, long size)
338 {
339 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
340
341 if (!ptr && size)
342 {
343 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
344 abort ();
345 }
346
347 return ptr;
348 }
349
350 #define ev_malloc(size) ev_realloc (0, (size))
351 #define ev_free(ptr) ev_realloc ((ptr), 0)
352
353 /*****************************************************************************/
354
355 typedef struct
356 {
357 WL head;
358 unsigned char events;
359 unsigned char reify;
360 #if EV_SELECT_IS_WINSOCKET
361 SOCKET handle;
362 #endif
363 } ANFD;
364
365 typedef struct
366 {
367 W w;
368 int events;
369 } ANPENDING;
370
371 #if EV_USE_INOTIFY
372 typedef struct
373 {
374 WL head;
375 } ANFS;
376 #endif
377
378 #if EV_MULTIPLICITY
379
380 struct ev_loop
381 {
382 ev_tstamp ev_rt_now;
383 #define ev_rt_now ((loop)->ev_rt_now)
384 #define VAR(name,decl) decl;
385 #include "ev_vars.h"
386 #undef VAR
387 };
388 #include "ev_wrap.h"
389
390 static struct ev_loop default_loop_struct;
391 struct ev_loop *ev_default_loop_ptr;
392
393 #else
394
395 ev_tstamp ev_rt_now;
396 #define VAR(name,decl) static decl;
397 #include "ev_vars.h"
398 #undef VAR
399
400 static int ev_default_loop_ptr;
401
402 #endif
403
404 /*****************************************************************************/
405
406 ev_tstamp
407 ev_time (void)
408 {
409 #if EV_USE_REALTIME
410 struct timespec ts;
411 clock_gettime (CLOCK_REALTIME, &ts);
412 return ts.tv_sec + ts.tv_nsec * 1e-9;
413 #else
414 struct timeval tv;
415 gettimeofday (&tv, 0);
416 return tv.tv_sec + tv.tv_usec * 1e-6;
417 #endif
418 }
419
420 ev_tstamp inline_size
421 get_clock (void)
422 {
423 #if EV_USE_MONOTONIC
424 if (expect_true (have_monotonic))
425 {
426 struct timespec ts;
427 clock_gettime (CLOCK_MONOTONIC, &ts);
428 return ts.tv_sec + ts.tv_nsec * 1e-9;
429 }
430 #endif
431
432 return ev_time ();
433 }
434
435 #if EV_MULTIPLICITY
436 ev_tstamp
437 ev_now (EV_P)
438 {
439 return ev_rt_now;
440 }
441 #endif
442
443 void
444 ev_sleep (ev_tstamp delay)
445 {
446 if (delay > 0.)
447 {
448 #if EV_USE_NANOSLEEP
449 struct timespec ts;
450
451 ts.tv_sec = (time_t)delay;
452 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
453
454 nanosleep (&ts, 0);
455 #elif defined(_WIN32)
456 Sleep (delay * 1e3);
457 #else
458 struct timeval tv;
459
460 tv.tv_sec = (time_t)delay;
461 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
462
463 select (0, 0, 0, 0, &tv);
464 #endif
465 }
466 }
467
468 /*****************************************************************************/
469
470 int inline_size
471 array_nextsize (int elem, int cur, int cnt)
472 {
473 int ncur = cur + 1;
474
475 do
476 ncur <<= 1;
477 while (cnt > ncur);
478
479 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
480 if (elem * ncur > 4096)
481 {
482 ncur *= elem;
483 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
484 ncur = ncur - sizeof (void *) * 4;
485 ncur /= elem;
486 }
487
488 return ncur;
489 }
490
491 static noinline void *
492 array_realloc (int elem, void *base, int *cur, int cnt)
493 {
494 *cur = array_nextsize (elem, *cur, cnt);
495 return ev_realloc (base, elem * *cur);
496 }
497
498 #define array_needsize(type,base,cur,cnt,init) \
499 if (expect_false ((cnt) > (cur))) \
500 { \
501 int ocur_ = (cur); \
502 (base) = (type *)array_realloc \
503 (sizeof (type), (base), &(cur), (cnt)); \
504 init ((base) + (ocur_), (cur) - ocur_); \
505 }
506
507 #if 0
508 #define array_slim(type,stem) \
509 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
510 { \
511 stem ## max = array_roundsize (stem ## cnt >> 1); \
512 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
513 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
514 }
515 #endif
516
517 #define array_free(stem, idx) \
518 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
519
520 /*****************************************************************************/
521
522 void noinline
523 ev_feed_event (EV_P_ void *w, int revents)
524 {
525 W w_ = (W)w;
526 int pri = ABSPRI (w_);
527
528 if (expect_false (w_->pending))
529 pendings [pri][w_->pending - 1].events |= revents;
530 else
531 {
532 w_->pending = ++pendingcnt [pri];
533 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
534 pendings [pri][w_->pending - 1].w = w_;
535 pendings [pri][w_->pending - 1].events = revents;
536 }
537 }
538
539 void inline_speed
540 queue_events (EV_P_ W *events, int eventcnt, int type)
541 {
542 int i;
543
544 for (i = 0; i < eventcnt; ++i)
545 ev_feed_event (EV_A_ events [i], type);
546 }
547
548 /*****************************************************************************/
549
550 void inline_size
551 anfds_init (ANFD *base, int count)
552 {
553 while (count--)
554 {
555 base->head = 0;
556 base->events = EV_NONE;
557 base->reify = 0;
558
559 ++base;
560 }
561 }
562
563 void inline_speed
564 fd_event (EV_P_ int fd, int revents)
565 {
566 ANFD *anfd = anfds + fd;
567 ev_io *w;
568
569 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
570 {
571 int ev = w->events & revents;
572
573 if (ev)
574 ev_feed_event (EV_A_ (W)w, ev);
575 }
576 }
577
578 void
579 ev_feed_fd_event (EV_P_ int fd, int revents)
580 {
581 if (fd >= 0 && fd < anfdmax)
582 fd_event (EV_A_ fd, revents);
583 }
584
585 void inline_size
586 fd_reify (EV_P)
587 {
588 int i;
589
590 for (i = 0; i < fdchangecnt; ++i)
591 {
592 int fd = fdchanges [i];
593 ANFD *anfd = anfds + fd;
594 ev_io *w;
595
596 unsigned char events = 0;
597
598 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
599 events |= (unsigned char)w->events;
600
601 #if EV_SELECT_IS_WINSOCKET
602 if (events)
603 {
604 unsigned long argp;
605 #ifdef EV_FD_TO_WIN32_HANDLE
606 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
607 #else
608 anfd->handle = _get_osfhandle (fd);
609 #endif
610 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
611 }
612 #endif
613
614 {
615 unsigned char o_events = anfd->events;
616 unsigned char o_reify = anfd->reify;
617
618 anfd->reify = 0;
619 anfd->events = events;
620
621 if (o_events != events || o_reify & EV_IOFDSET)
622 backend_modify (EV_A_ fd, o_events, events);
623 }
624 }
625
626 fdchangecnt = 0;
627 }
628
629 void inline_size
630 fd_change (EV_P_ int fd, int flags)
631 {
632 unsigned char reify = anfds [fd].reify;
633 anfds [fd].reify |= flags;
634
635 if (expect_true (!reify))
636 {
637 ++fdchangecnt;
638 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
639 fdchanges [fdchangecnt - 1] = fd;
640 }
641 }
642
643 void inline_speed
644 fd_kill (EV_P_ int fd)
645 {
646 ev_io *w;
647
648 while ((w = (ev_io *)anfds [fd].head))
649 {
650 ev_io_stop (EV_A_ w);
651 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
652 }
653 }
654
655 int inline_size
656 fd_valid (int fd)
657 {
658 #ifdef _WIN32
659 return _get_osfhandle (fd) != -1;
660 #else
661 return fcntl (fd, F_GETFD) != -1;
662 #endif
663 }
664
665 /* called on EBADF to verify fds */
666 static void noinline
667 fd_ebadf (EV_P)
668 {
669 int fd;
670
671 for (fd = 0; fd < anfdmax; ++fd)
672 if (anfds [fd].events)
673 if (!fd_valid (fd) == -1 && errno == EBADF)
674 fd_kill (EV_A_ fd);
675 }
676
677 /* called on ENOMEM in select/poll to kill some fds and retry */
678 static void noinline
679 fd_enomem (EV_P)
680 {
681 int fd;
682
683 for (fd = anfdmax; fd--; )
684 if (anfds [fd].events)
685 {
686 fd_kill (EV_A_ fd);
687 return;
688 }
689 }
690
691 /* usually called after fork if backend needs to re-arm all fds from scratch */
692 static void noinline
693 fd_rearm_all (EV_P)
694 {
695 int fd;
696
697 for (fd = 0; fd < anfdmax; ++fd)
698 if (anfds [fd].events)
699 {
700 anfds [fd].events = 0;
701 fd_change (EV_A_ fd, EV_IOFDSET | 1);
702 }
703 }
704
705 /*****************************************************************************/
706
707 void inline_speed
708 upheap (WT *heap, int k)
709 {
710 WT w = heap [k];
711
712 while (k)
713 {
714 int p = (k - 1) >> 1;
715
716 if (heap [p]->at <= w->at)
717 break;
718
719 heap [k] = heap [p];
720 ((W)heap [k])->active = k + 1;
721 k = p;
722 }
723
724 heap [k] = w;
725 ((W)heap [k])->active = k + 1;
726 }
727
728 void inline_speed
729 downheap (WT *heap, int N, int k)
730 {
731 WT w = heap [k];
732
733 for (;;)
734 {
735 int c = (k << 1) + 1;
736
737 if (c >= N)
738 break;
739
740 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
741 ? 1 : 0;
742
743 if (w->at <= heap [c]->at)
744 break;
745
746 heap [k] = heap [c];
747 ((W)heap [k])->active = k + 1;
748
749 k = c;
750 }
751
752 heap [k] = w;
753 ((W)heap [k])->active = k + 1;
754 }
755
756 void inline_size
757 adjustheap (WT *heap, int N, int k)
758 {
759 upheap (heap, k);
760 downheap (heap, N, k);
761 }
762
763 /*****************************************************************************/
764
765 typedef struct
766 {
767 WL head;
768 sig_atomic_t volatile gotsig;
769 } ANSIG;
770
771 static ANSIG *signals;
772 static int signalmax;
773
774 static int sigpipe [2];
775 static sig_atomic_t volatile gotsig;
776 static ev_io sigev;
777
778 void inline_size
779 signals_init (ANSIG *base, int count)
780 {
781 while (count--)
782 {
783 base->head = 0;
784 base->gotsig = 0;
785
786 ++base;
787 }
788 }
789
790 static void
791 sighandler (int signum)
792 {
793 #if _WIN32
794 signal (signum, sighandler);
795 #endif
796
797 signals [signum - 1].gotsig = 1;
798
799 if (!gotsig)
800 {
801 int old_errno = errno;
802 gotsig = 1;
803 write (sigpipe [1], &signum, 1);
804 errno = old_errno;
805 }
806 }
807
808 void noinline
809 ev_feed_signal_event (EV_P_ int signum)
810 {
811 WL w;
812
813 #if EV_MULTIPLICITY
814 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
815 #endif
816
817 --signum;
818
819 if (signum < 0 || signum >= signalmax)
820 return;
821
822 signals [signum].gotsig = 0;
823
824 for (w = signals [signum].head; w; w = w->next)
825 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
826 }
827
828 static void
829 sigcb (EV_P_ ev_io *iow, int revents)
830 {
831 int signum;
832
833 read (sigpipe [0], &revents, 1);
834 gotsig = 0;
835
836 for (signum = signalmax; signum--; )
837 if (signals [signum].gotsig)
838 ev_feed_signal_event (EV_A_ signum + 1);
839 }
840
841 void inline_speed
842 fd_intern (int fd)
843 {
844 #ifdef _WIN32
845 int arg = 1;
846 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
847 #else
848 fcntl (fd, F_SETFD, FD_CLOEXEC);
849 fcntl (fd, F_SETFL, O_NONBLOCK);
850 #endif
851 }
852
853 static void noinline
854 siginit (EV_P)
855 {
856 fd_intern (sigpipe [0]);
857 fd_intern (sigpipe [1]);
858
859 ev_io_set (&sigev, sigpipe [0], EV_READ);
860 ev_io_start (EV_A_ &sigev);
861 ev_unref (EV_A); /* child watcher should not keep loop alive */
862 }
863
864 /*****************************************************************************/
865
866 static WL childs [EV_PID_HASHSIZE];
867
868 #ifndef _WIN32
869
870 static ev_signal childev;
871
872 #ifndef WIFCONTINUED
873 # define WIFCONTINUED(status) 0
874 #endif
875
876 void inline_speed
877 child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
878 {
879 ev_child *w;
880 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
881
882 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
883 {
884 if ((w->pid == pid || !w->pid)
885 && (!traced || (w->flags & 1)))
886 {
887 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
888 w->rpid = pid;
889 w->rstatus = status;
890 ev_feed_event (EV_A_ (W)w, EV_CHILD);
891 }
892 }
893 }
894
895 #ifndef WCONTINUED
896 # define WCONTINUED 0
897 #endif
898
899 static void
900 childcb (EV_P_ ev_signal *sw, int revents)
901 {
902 int pid, status;
903
904 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
905 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
906 if (!WCONTINUED
907 || errno != EINVAL
908 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
909 return;
910
911 /* make sure we are called again until all childs have been reaped */
912 /* we need to do it this way so that the callback gets called before we continue */
913 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
914
915 child_reap (EV_A_ sw, pid, pid, status);
916 if (EV_PID_HASHSIZE > 1)
917 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
918 }
919
920 #endif
921
922 /*****************************************************************************/
923
924 #if EV_USE_PORT
925 # include "ev_port.c"
926 #endif
927 #if EV_USE_KQUEUE
928 # include "ev_kqueue.c"
929 #endif
930 #if EV_USE_EPOLL
931 # include "ev_epoll.c"
932 #endif
933 #if EV_USE_POLL
934 # include "ev_poll.c"
935 #endif
936 #if EV_USE_SELECT
937 # include "ev_select.c"
938 #endif
939
940 int
941 ev_version_major (void)
942 {
943 return EV_VERSION_MAJOR;
944 }
945
946 int
947 ev_version_minor (void)
948 {
949 return EV_VERSION_MINOR;
950 }
951
952 /* return true if we are running with elevated privileges and should ignore env variables */
953 int inline_size
954 enable_secure (void)
955 {
956 #ifdef _WIN32
957 return 0;
958 #else
959 return getuid () != geteuid ()
960 || getgid () != getegid ();
961 #endif
962 }
963
964 unsigned int
965 ev_supported_backends (void)
966 {
967 unsigned int flags = 0;
968
969 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
970 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
971 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
972 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
973 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
974
975 return flags;
976 }
977
978 unsigned int
979 ev_recommended_backends (void)
980 {
981 unsigned int flags = ev_supported_backends ();
982
983 #ifndef __NetBSD__
984 /* kqueue is borked on everything but netbsd apparently */
985 /* it usually doesn't work correctly on anything but sockets and pipes */
986 flags &= ~EVBACKEND_KQUEUE;
987 #endif
988 #ifdef __APPLE__
989 // flags &= ~EVBACKEND_KQUEUE; for documentation
990 flags &= ~EVBACKEND_POLL;
991 #endif
992
993 return flags;
994 }
995
996 unsigned int
997 ev_embeddable_backends (void)
998 {
999 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1000
1001 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1002 /* please fix it and tell me how to detect the fix */
1003 flags &= ~EVBACKEND_EPOLL;
1004
1005 return flags;
1006 }
1007
1008 unsigned int
1009 ev_backend (EV_P)
1010 {
1011 return backend;
1012 }
1013
1014 unsigned int
1015 ev_loop_count (EV_P)
1016 {
1017 return loop_count;
1018 }
1019
1020 void
1021 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1022 {
1023 io_blocktime = interval;
1024 }
1025
1026 void
1027 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1028 {
1029 timeout_blocktime = interval;
1030 }
1031
1032 static void noinline
1033 loop_init (EV_P_ unsigned int flags)
1034 {
1035 if (!backend)
1036 {
1037 #if EV_USE_MONOTONIC
1038 {
1039 struct timespec ts;
1040 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1041 have_monotonic = 1;
1042 }
1043 #endif
1044
1045 ev_rt_now = ev_time ();
1046 mn_now = get_clock ();
1047 now_floor = mn_now;
1048 rtmn_diff = ev_rt_now - mn_now;
1049
1050 io_blocktime = 0.;
1051 timeout_blocktime = 0.;
1052
1053 /* pid check not overridable via env */
1054 #ifndef _WIN32
1055 if (flags & EVFLAG_FORKCHECK)
1056 curpid = getpid ();
1057 #endif
1058
1059 if (!(flags & EVFLAG_NOENV)
1060 && !enable_secure ()
1061 && getenv ("LIBEV_FLAGS"))
1062 flags = atoi (getenv ("LIBEV_FLAGS"));
1063
1064 if (!(flags & 0x0000ffffUL))
1065 flags |= ev_recommended_backends ();
1066
1067 backend = 0;
1068 backend_fd = -1;
1069 #if EV_USE_INOTIFY
1070 fs_fd = -2;
1071 #endif
1072
1073 #if EV_USE_PORT
1074 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1075 #endif
1076 #if EV_USE_KQUEUE
1077 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1078 #endif
1079 #if EV_USE_EPOLL
1080 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1081 #endif
1082 #if EV_USE_POLL
1083 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1084 #endif
1085 #if EV_USE_SELECT
1086 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1087 #endif
1088
1089 ev_init (&sigev, sigcb);
1090 ev_set_priority (&sigev, EV_MAXPRI);
1091 }
1092 }
1093
1094 static void noinline
1095 loop_destroy (EV_P)
1096 {
1097 int i;
1098
1099 #if EV_USE_INOTIFY
1100 if (fs_fd >= 0)
1101 close (fs_fd);
1102 #endif
1103
1104 if (backend_fd >= 0)
1105 close (backend_fd);
1106
1107 #if EV_USE_PORT
1108 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1109 #endif
1110 #if EV_USE_KQUEUE
1111 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1112 #endif
1113 #if EV_USE_EPOLL
1114 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1115 #endif
1116 #if EV_USE_POLL
1117 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1118 #endif
1119 #if EV_USE_SELECT
1120 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1121 #endif
1122
1123 for (i = NUMPRI; i--; )
1124 {
1125 array_free (pending, [i]);
1126 #if EV_IDLE_ENABLE
1127 array_free (idle, [i]);
1128 #endif
1129 }
1130
1131 ev_free (anfds); anfdmax = 0;
1132
1133 /* have to use the microsoft-never-gets-it-right macro */
1134 array_free (fdchange, EMPTY);
1135 array_free (timer, EMPTY);
1136 #if EV_PERIODIC_ENABLE
1137 array_free (periodic, EMPTY);
1138 #endif
1139 #if EV_FORK_ENABLE
1140 array_free (fork, EMPTY);
1141 #endif
1142 array_free (prepare, EMPTY);
1143 array_free (check, EMPTY);
1144
1145 backend = 0;
1146 }
1147
1148 void inline_size infy_fork (EV_P);
1149
1150 void inline_size
1151 loop_fork (EV_P)
1152 {
1153 #if EV_USE_PORT
1154 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1155 #endif
1156 #if EV_USE_KQUEUE
1157 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1158 #endif
1159 #if EV_USE_EPOLL
1160 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1161 #endif
1162 #if EV_USE_INOTIFY
1163 infy_fork (EV_A);
1164 #endif
1165
1166 if (ev_is_active (&sigev))
1167 {
1168 /* default loop */
1169
1170 ev_ref (EV_A);
1171 ev_io_stop (EV_A_ &sigev);
1172 close (sigpipe [0]);
1173 close (sigpipe [1]);
1174
1175 while (pipe (sigpipe))
1176 syserr ("(libev) error creating pipe");
1177
1178 siginit (EV_A);
1179 sigcb (EV_A_ &sigev, EV_READ);
1180 }
1181
1182 postfork = 0;
1183 }
1184
1185 #if EV_MULTIPLICITY
1186 struct ev_loop *
1187 ev_loop_new (unsigned int flags)
1188 {
1189 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1190
1191 memset (loop, 0, sizeof (struct ev_loop));
1192
1193 loop_init (EV_A_ flags);
1194
1195 if (ev_backend (EV_A))
1196 return loop;
1197
1198 return 0;
1199 }
1200
1201 void
1202 ev_loop_destroy (EV_P)
1203 {
1204 loop_destroy (EV_A);
1205 ev_free (loop);
1206 }
1207
1208 void
1209 ev_loop_fork (EV_P)
1210 {
1211 postfork = 1; /* must be in line with ev_default_fork */
1212 }
1213
1214 #endif
1215
1216 #if EV_MULTIPLICITY
1217 struct ev_loop *
1218 ev_default_loop_init (unsigned int flags)
1219 #else
1220 int
1221 ev_default_loop (unsigned int flags)
1222 #endif
1223 {
1224 if (sigpipe [0] == sigpipe [1])
1225 if (pipe (sigpipe))
1226 return 0;
1227
1228 if (!ev_default_loop_ptr)
1229 {
1230 #if EV_MULTIPLICITY
1231 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1232 #else
1233 ev_default_loop_ptr = 1;
1234 #endif
1235
1236 loop_init (EV_A_ flags);
1237
1238 if (ev_backend (EV_A))
1239 {
1240 siginit (EV_A);
1241
1242 #ifndef _WIN32
1243 ev_signal_init (&childev, childcb, SIGCHLD);
1244 ev_set_priority (&childev, EV_MAXPRI);
1245 ev_signal_start (EV_A_ &childev);
1246 ev_unref (EV_A); /* child watcher should not keep loop alive */
1247 #endif
1248 }
1249 else
1250 ev_default_loop_ptr = 0;
1251 }
1252
1253 return ev_default_loop_ptr;
1254 }
1255
1256 void
1257 ev_default_destroy (void)
1258 {
1259 #if EV_MULTIPLICITY
1260 struct ev_loop *loop = ev_default_loop_ptr;
1261 #endif
1262
1263 #ifndef _WIN32
1264 ev_ref (EV_A); /* child watcher */
1265 ev_signal_stop (EV_A_ &childev);
1266 #endif
1267
1268 ev_ref (EV_A); /* signal watcher */
1269 ev_io_stop (EV_A_ &sigev);
1270
1271 close (sigpipe [0]); sigpipe [0] = 0;
1272 close (sigpipe [1]); sigpipe [1] = 0;
1273
1274 loop_destroy (EV_A);
1275 }
1276
1277 void
1278 ev_default_fork (void)
1279 {
1280 #if EV_MULTIPLICITY
1281 struct ev_loop *loop = ev_default_loop_ptr;
1282 #endif
1283
1284 if (backend)
1285 postfork = 1; /* must be in line with ev_loop_fork */
1286 }
1287
1288 /*****************************************************************************/
1289
1290 void
1291 ev_invoke (EV_P_ void *w, int revents)
1292 {
1293 EV_CB_INVOKE ((W)w, revents);
1294 }
1295
1296 void inline_speed
1297 call_pending (EV_P)
1298 {
1299 int pri;
1300
1301 for (pri = NUMPRI; pri--; )
1302 while (pendingcnt [pri])
1303 {
1304 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1305
1306 if (expect_true (p->w))
1307 {
1308 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1309
1310 p->w->pending = 0;
1311 EV_CB_INVOKE (p->w, p->events);
1312 }
1313 }
1314 }
1315
1316 void inline_size
1317 timers_reify (EV_P)
1318 {
1319 while (timercnt && ((WT)timers [0])->at <= mn_now)
1320 {
1321 ev_timer *w = (ev_timer *)timers [0];
1322
1323 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1324
1325 /* first reschedule or stop timer */
1326 if (w->repeat)
1327 {
1328 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1329
1330 ((WT)w)->at += w->repeat;
1331 if (((WT)w)->at < mn_now)
1332 ((WT)w)->at = mn_now;
1333
1334 downheap (timers, timercnt, 0);
1335 }
1336 else
1337 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1338
1339 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1340 }
1341 }
1342
1343 #if EV_PERIODIC_ENABLE
1344 void inline_size
1345 periodics_reify (EV_P)
1346 {
1347 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1348 {
1349 ev_periodic *w = (ev_periodic *)periodics [0];
1350
1351 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1352
1353 /* first reschedule or stop timer */
1354 if (w->reschedule_cb)
1355 {
1356 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1357 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1358 downheap (periodics, periodiccnt, 0);
1359 }
1360 else if (w->interval)
1361 {
1362 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1363 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1364 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1365 downheap (periodics, periodiccnt, 0);
1366 }
1367 else
1368 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1369
1370 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1371 }
1372 }
1373
1374 static void noinline
1375 periodics_reschedule (EV_P)
1376 {
1377 int i;
1378
1379 /* adjust periodics after time jump */
1380 for (i = 0; i < periodiccnt; ++i)
1381 {
1382 ev_periodic *w = (ev_periodic *)periodics [i];
1383
1384 if (w->reschedule_cb)
1385 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1386 else if (w->interval)
1387 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1388 }
1389
1390 /* now rebuild the heap */
1391 for (i = periodiccnt >> 1; i--; )
1392 downheap (periodics, periodiccnt, i);
1393 }
1394 #endif
1395
1396 #if EV_IDLE_ENABLE
1397 void inline_size
1398 idle_reify (EV_P)
1399 {
1400 if (expect_false (idleall))
1401 {
1402 int pri;
1403
1404 for (pri = NUMPRI; pri--; )
1405 {
1406 if (pendingcnt [pri])
1407 break;
1408
1409 if (idlecnt [pri])
1410 {
1411 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1412 break;
1413 }
1414 }
1415 }
1416 }
1417 #endif
1418
1419 void inline_speed
1420 time_update (EV_P_ ev_tstamp max_block)
1421 {
1422 int i;
1423
1424 #if EV_USE_MONOTONIC
1425 if (expect_true (have_monotonic))
1426 {
1427 ev_tstamp odiff = rtmn_diff;
1428
1429 mn_now = get_clock ();
1430
1431 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1432 /* interpolate in the meantime */
1433 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1434 {
1435 ev_rt_now = rtmn_diff + mn_now;
1436 return;
1437 }
1438
1439 now_floor = mn_now;
1440 ev_rt_now = ev_time ();
1441
1442 /* loop a few times, before making important decisions.
1443 * on the choice of "4": one iteration isn't enough,
1444 * in case we get preempted during the calls to
1445 * ev_time and get_clock. a second call is almost guaranteed
1446 * to succeed in that case, though. and looping a few more times
1447 * doesn't hurt either as we only do this on time-jumps or
1448 * in the unlikely event of having been preempted here.
1449 */
1450 for (i = 4; --i; )
1451 {
1452 rtmn_diff = ev_rt_now - mn_now;
1453
1454 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1455 return; /* all is well */
1456
1457 ev_rt_now = ev_time ();
1458 mn_now = get_clock ();
1459 now_floor = mn_now;
1460 }
1461
1462 # if EV_PERIODIC_ENABLE
1463 periodics_reschedule (EV_A);
1464 # endif
1465 /* no timer adjustment, as the monotonic clock doesn't jump */
1466 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1467 }
1468 else
1469 #endif
1470 {
1471 ev_rt_now = ev_time ();
1472
1473 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1474 {
1475 #if EV_PERIODIC_ENABLE
1476 periodics_reschedule (EV_A);
1477 #endif
1478 /* adjust timers. this is easy, as the offset is the same for all of them */
1479 for (i = 0; i < timercnt; ++i)
1480 ((WT)timers [i])->at += ev_rt_now - mn_now;
1481 }
1482
1483 mn_now = ev_rt_now;
1484 }
1485 }
1486
1487 void
1488 ev_ref (EV_P)
1489 {
1490 ++activecnt;
1491 }
1492
1493 void
1494 ev_unref (EV_P)
1495 {
1496 --activecnt;
1497 }
1498
1499 static int loop_done;
1500
1501 void
1502 ev_loop (EV_P_ int flags)
1503 {
1504 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
1505 ? EVUNLOOP_ONE
1506 : EVUNLOOP_CANCEL;
1507
1508 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1509
1510 do
1511 {
1512 #ifndef _WIN32
1513 if (expect_false (curpid)) /* penalise the forking check even more */
1514 if (expect_false (getpid () != curpid))
1515 {
1516 curpid = getpid ();
1517 postfork = 1;
1518 }
1519 #endif
1520
1521 #if EV_FORK_ENABLE
1522 /* we might have forked, so queue fork handlers */
1523 if (expect_false (postfork))
1524 if (forkcnt)
1525 {
1526 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1527 call_pending (EV_A);
1528 }
1529 #endif
1530
1531 /* queue prepare watchers (and execute them) */
1532 if (expect_false (preparecnt))
1533 {
1534 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1535 call_pending (EV_A);
1536 }
1537
1538 if (expect_false (!activecnt))
1539 break;
1540
1541 /* we might have forked, so reify kernel state if necessary */
1542 if (expect_false (postfork))
1543 loop_fork (EV_A);
1544
1545 /* update fd-related kernel structures */
1546 fd_reify (EV_A);
1547
1548 /* calculate blocking time */
1549 {
1550 ev_tstamp waittime = 0.;
1551 ev_tstamp sleeptime = 0.;
1552
1553 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1554 {
1555 /* update time to cancel out callback processing overhead */
1556 time_update (EV_A_ 1e100);
1557
1558 waittime = MAX_BLOCKTIME;
1559
1560 if (timercnt)
1561 {
1562 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1563 if (waittime > to) waittime = to;
1564 }
1565
1566 #if EV_PERIODIC_ENABLE
1567 if (periodiccnt)
1568 {
1569 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1570 if (waittime > to) waittime = to;
1571 }
1572 #endif
1573
1574 if (expect_false (waittime < timeout_blocktime))
1575 waittime = timeout_blocktime;
1576
1577 sleeptime = waittime - backend_fudge;
1578
1579 if (expect_true (sleeptime > io_blocktime))
1580 sleeptime = io_blocktime;
1581
1582 if (sleeptime)
1583 {
1584 ev_sleep (sleeptime);
1585 waittime -= sleeptime;
1586 }
1587 }
1588
1589 ++loop_count;
1590 backend_poll (EV_A_ waittime);
1591
1592 /* update ev_rt_now, do magic */
1593 time_update (EV_A_ waittime + sleeptime);
1594 }
1595
1596 /* queue pending timers and reschedule them */
1597 timers_reify (EV_A); /* relative timers called last */
1598 #if EV_PERIODIC_ENABLE
1599 periodics_reify (EV_A); /* absolute timers called first */
1600 #endif
1601
1602 #if EV_IDLE_ENABLE
1603 /* queue idle watchers unless other events are pending */
1604 idle_reify (EV_A);
1605 #endif
1606
1607 /* queue check watchers, to be executed first */
1608 if (expect_false (checkcnt))
1609 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1610
1611 call_pending (EV_A);
1612
1613 }
1614 while (expect_true (activecnt && !loop_done));
1615
1616 if (loop_done == EVUNLOOP_ONE)
1617 loop_done = EVUNLOOP_CANCEL;
1618 }
1619
1620 void
1621 ev_unloop (EV_P_ int how)
1622 {
1623 loop_done = how;
1624 }
1625
1626 /*****************************************************************************/
1627
1628 void inline_size
1629 wlist_add (WL *head, WL elem)
1630 {
1631 elem->next = *head;
1632 *head = elem;
1633 }
1634
1635 void inline_size
1636 wlist_del (WL *head, WL elem)
1637 {
1638 while (*head)
1639 {
1640 if (*head == elem)
1641 {
1642 *head = elem->next;
1643 return;
1644 }
1645
1646 head = &(*head)->next;
1647 }
1648 }
1649
1650 void inline_speed
1651 clear_pending (EV_P_ W w)
1652 {
1653 if (w->pending)
1654 {
1655 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1656 w->pending = 0;
1657 }
1658 }
1659
1660 int
1661 ev_clear_pending (EV_P_ void *w)
1662 {
1663 W w_ = (W)w;
1664 int pending = w_->pending;
1665
1666 if (expect_true (pending))
1667 {
1668 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1669 w_->pending = 0;
1670 p->w = 0;
1671 return p->events;
1672 }
1673 else
1674 return 0;
1675 }
1676
1677 void inline_size
1678 pri_adjust (EV_P_ W w)
1679 {
1680 int pri = w->priority;
1681 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1682 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1683 w->priority = pri;
1684 }
1685
1686 void inline_speed
1687 ev_start (EV_P_ W w, int active)
1688 {
1689 pri_adjust (EV_A_ w);
1690 w->active = active;
1691 ev_ref (EV_A);
1692 }
1693
1694 void inline_size
1695 ev_stop (EV_P_ W w)
1696 {
1697 ev_unref (EV_A);
1698 w->active = 0;
1699 }
1700
1701 /*****************************************************************************/
1702
1703 void noinline
1704 ev_io_start (EV_P_ ev_io *w)
1705 {
1706 int fd = w->fd;
1707
1708 if (expect_false (ev_is_active (w)))
1709 return;
1710
1711 assert (("ev_io_start called with negative fd", fd >= 0));
1712
1713 ev_start (EV_A_ (W)w, 1);
1714 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1715 wlist_add (&anfds[fd].head, (WL)w);
1716
1717 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1718 w->events &= ~EV_IOFDSET;
1719 }
1720
1721 void noinline
1722 ev_io_stop (EV_P_ ev_io *w)
1723 {
1724 clear_pending (EV_A_ (W)w);
1725 if (expect_false (!ev_is_active (w)))
1726 return;
1727
1728 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1729
1730 wlist_del (&anfds[w->fd].head, (WL)w);
1731 ev_stop (EV_A_ (W)w);
1732
1733 fd_change (EV_A_ w->fd, 1);
1734 }
1735
1736 void noinline
1737 ev_timer_start (EV_P_ ev_timer *w)
1738 {
1739 if (expect_false (ev_is_active (w)))
1740 return;
1741
1742 ((WT)w)->at += mn_now;
1743
1744 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1745
1746 ev_start (EV_A_ (W)w, ++timercnt);
1747 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1748 timers [timercnt - 1] = (WT)w;
1749 upheap (timers, timercnt - 1);
1750
1751 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1752 }
1753
1754 void noinline
1755 ev_timer_stop (EV_P_ ev_timer *w)
1756 {
1757 clear_pending (EV_A_ (W)w);
1758 if (expect_false (!ev_is_active (w)))
1759 return;
1760
1761 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1762
1763 {
1764 int active = ((W)w)->active;
1765
1766 if (expect_true (--active < --timercnt))
1767 {
1768 timers [active] = timers [timercnt];
1769 adjustheap (timers, timercnt, active);
1770 }
1771 }
1772
1773 ((WT)w)->at -= mn_now;
1774
1775 ev_stop (EV_A_ (W)w);
1776 }
1777
1778 void noinline
1779 ev_timer_again (EV_P_ ev_timer *w)
1780 {
1781 if (ev_is_active (w))
1782 {
1783 if (w->repeat)
1784 {
1785 ((WT)w)->at = mn_now + w->repeat;
1786 adjustheap (timers, timercnt, ((W)w)->active - 1);
1787 }
1788 else
1789 ev_timer_stop (EV_A_ w);
1790 }
1791 else if (w->repeat)
1792 {
1793 w->at = w->repeat;
1794 ev_timer_start (EV_A_ w);
1795 }
1796 }
1797
1798 #if EV_PERIODIC_ENABLE
1799 void noinline
1800 ev_periodic_start (EV_P_ ev_periodic *w)
1801 {
1802 if (expect_false (ev_is_active (w)))
1803 return;
1804
1805 if (w->reschedule_cb)
1806 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1807 else if (w->interval)
1808 {
1809 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1810 /* this formula differs from the one in periodic_reify because we do not always round up */
1811 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1812 }
1813 else
1814 ((WT)w)->at = w->offset;
1815
1816 ev_start (EV_A_ (W)w, ++periodiccnt);
1817 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1818 periodics [periodiccnt - 1] = (WT)w;
1819 upheap (periodics, periodiccnt - 1);
1820
1821 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1822 }
1823
1824 void noinline
1825 ev_periodic_stop (EV_P_ ev_periodic *w)
1826 {
1827 clear_pending (EV_A_ (W)w);
1828 if (expect_false (!ev_is_active (w)))
1829 return;
1830
1831 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1832
1833 {
1834 int active = ((W)w)->active;
1835
1836 if (expect_true (--active < --periodiccnt))
1837 {
1838 periodics [active] = periodics [periodiccnt];
1839 adjustheap (periodics, periodiccnt, active);
1840 }
1841 }
1842
1843 ev_stop (EV_A_ (W)w);
1844 }
1845
1846 void noinline
1847 ev_periodic_again (EV_P_ ev_periodic *w)
1848 {
1849 /* TODO: use adjustheap and recalculation */
1850 ev_periodic_stop (EV_A_ w);
1851 ev_periodic_start (EV_A_ w);
1852 }
1853 #endif
1854
1855 #ifndef SA_RESTART
1856 # define SA_RESTART 0
1857 #endif
1858
1859 void noinline
1860 ev_signal_start (EV_P_ ev_signal *w)
1861 {
1862 #if EV_MULTIPLICITY
1863 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1864 #endif
1865 if (expect_false (ev_is_active (w)))
1866 return;
1867
1868 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1869
1870 {
1871 #ifndef _WIN32
1872 sigset_t full, prev;
1873 sigfillset (&full);
1874 sigprocmask (SIG_SETMASK, &full, &prev);
1875 #endif
1876
1877 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1878
1879 #ifndef _WIN32
1880 sigprocmask (SIG_SETMASK, &prev, 0);
1881 #endif
1882 }
1883
1884 ev_start (EV_A_ (W)w, 1);
1885 wlist_add (&signals [w->signum - 1].head, (WL)w);
1886
1887 if (!((WL)w)->next)
1888 {
1889 #if _WIN32
1890 signal (w->signum, sighandler);
1891 #else
1892 struct sigaction sa;
1893 sa.sa_handler = sighandler;
1894 sigfillset (&sa.sa_mask);
1895 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1896 sigaction (w->signum, &sa, 0);
1897 #endif
1898 }
1899 }
1900
1901 void noinline
1902 ev_signal_stop (EV_P_ ev_signal *w)
1903 {
1904 clear_pending (EV_A_ (W)w);
1905 if (expect_false (!ev_is_active (w)))
1906 return;
1907
1908 wlist_del (&signals [w->signum - 1].head, (WL)w);
1909 ev_stop (EV_A_ (W)w);
1910
1911 if (!signals [w->signum - 1].head)
1912 signal (w->signum, SIG_DFL);
1913 }
1914
1915 void
1916 ev_child_start (EV_P_ ev_child *w)
1917 {
1918 #if EV_MULTIPLICITY
1919 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1920 #endif
1921 if (expect_false (ev_is_active (w)))
1922 return;
1923
1924 ev_start (EV_A_ (W)w, 1);
1925 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1926 }
1927
1928 void
1929 ev_child_stop (EV_P_ ev_child *w)
1930 {
1931 clear_pending (EV_A_ (W)w);
1932 if (expect_false (!ev_is_active (w)))
1933 return;
1934
1935 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1936 ev_stop (EV_A_ (W)w);
1937 }
1938
1939 #if EV_STAT_ENABLE
1940
1941 # ifdef _WIN32
1942 # undef lstat
1943 # define lstat(a,b) _stati64 (a,b)
1944 # endif
1945
1946 #define DEF_STAT_INTERVAL 5.0074891
1947 #define MIN_STAT_INTERVAL 0.1074891
1948
1949 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1950
1951 #if EV_USE_INOTIFY
1952 # define EV_INOTIFY_BUFSIZE 8192
1953
1954 static void noinline
1955 infy_add (EV_P_ ev_stat *w)
1956 {
1957 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);
1958
1959 if (w->wd < 0)
1960 {
1961 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1962
1963 /* monitor some parent directory for speedup hints */
1964 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1965 {
1966 char path [4096];
1967 strcpy (path, w->path);
1968
1969 do
1970 {
1971 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1972 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1973
1974 char *pend = strrchr (path, '/');
1975
1976 if (!pend)
1977 break; /* whoops, no '/', complain to your admin */
1978
1979 *pend = 0;
1980 w->wd = inotify_add_watch (fs_fd, path, mask);
1981 }
1982 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1983 }
1984 }
1985 else
1986 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1987
1988 if (w->wd >= 0)
1989 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
1990 }
1991
1992 static void noinline
1993 infy_del (EV_P_ ev_stat *w)
1994 {
1995 int slot;
1996 int wd = w->wd;
1997
1998 if (wd < 0)
1999 return;
2000
2001 w->wd = -2;
2002 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2003 wlist_del (&fs_hash [slot].head, (WL)w);
2004
2005 /* remove this watcher, if others are watching it, they will rearm */
2006 inotify_rm_watch (fs_fd, wd);
2007 }
2008
2009 static void noinline
2010 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2011 {
2012 if (slot < 0)
2013 /* overflow, need to check for all hahs slots */
2014 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2015 infy_wd (EV_A_ slot, wd, ev);
2016 else
2017 {
2018 WL w_;
2019
2020 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2021 {
2022 ev_stat *w = (ev_stat *)w_;
2023 w_ = w_->next; /* lets us remove this watcher and all before it */
2024
2025 if (w->wd == wd || wd == -1)
2026 {
2027 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2028 {
2029 w->wd = -1;
2030 infy_add (EV_A_ w); /* re-add, no matter what */
2031 }
2032
2033 stat_timer_cb (EV_A_ &w->timer, 0);
2034 }
2035 }
2036 }
2037 }
2038
2039 static void
2040 infy_cb (EV_P_ ev_io *w, int revents)
2041 {
2042 char buf [EV_INOTIFY_BUFSIZE];
2043 struct inotify_event *ev = (struct inotify_event *)buf;
2044 int ofs;
2045 int len = read (fs_fd, buf, sizeof (buf));
2046
2047 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2048 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2049 }
2050
2051 void inline_size
2052 infy_init (EV_P)
2053 {
2054 if (fs_fd != -2)
2055 return;
2056
2057 fs_fd = inotify_init ();
2058
2059 if (fs_fd >= 0)
2060 {
2061 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2062 ev_set_priority (&fs_w, EV_MAXPRI);
2063 ev_io_start (EV_A_ &fs_w);
2064 }
2065 }
2066
2067 void inline_size
2068 infy_fork (EV_P)
2069 {
2070 int slot;
2071
2072 if (fs_fd < 0)
2073 return;
2074
2075 close (fs_fd);
2076 fs_fd = inotify_init ();
2077
2078 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2079 {
2080 WL w_ = fs_hash [slot].head;
2081 fs_hash [slot].head = 0;
2082
2083 while (w_)
2084 {
2085 ev_stat *w = (ev_stat *)w_;
2086 w_ = w_->next; /* lets us add this watcher */
2087
2088 w->wd = -1;
2089
2090 if (fs_fd >= 0)
2091 infy_add (EV_A_ w); /* re-add, no matter what */
2092 else
2093 ev_timer_start (EV_A_ &w->timer);
2094 }
2095
2096 }
2097 }
2098
2099 #endif
2100
2101 void
2102 ev_stat_stat (EV_P_ ev_stat *w)
2103 {
2104 if (lstat (w->path, &w->attr) < 0)
2105 w->attr.st_nlink = 0;
2106 else if (!w->attr.st_nlink)
2107 w->attr.st_nlink = 1;
2108 }
2109
2110 static void noinline
2111 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2112 {
2113 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2114
2115 /* we copy this here each the time so that */
2116 /* prev has the old value when the callback gets invoked */
2117 w->prev = w->attr;
2118 ev_stat_stat (EV_A_ w);
2119
2120 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2121 if (
2122 w->prev.st_dev != w->attr.st_dev
2123 || w->prev.st_ino != w->attr.st_ino
2124 || w->prev.st_mode != w->attr.st_mode
2125 || w->prev.st_nlink != w->attr.st_nlink
2126 || w->prev.st_uid != w->attr.st_uid
2127 || w->prev.st_gid != w->attr.st_gid
2128 || w->prev.st_rdev != w->attr.st_rdev
2129 || w->prev.st_size != w->attr.st_size
2130 || w->prev.st_atime != w->attr.st_atime
2131 || w->prev.st_mtime != w->attr.st_mtime
2132 || w->prev.st_ctime != w->attr.st_ctime
2133 ) {
2134 #if EV_USE_INOTIFY
2135 infy_del (EV_A_ w);
2136 infy_add (EV_A_ w);
2137 ev_stat_stat (EV_A_ w); /* avoid race... */
2138 #endif
2139
2140 ev_feed_event (EV_A_ w, EV_STAT);
2141 }
2142 }
2143
2144 void
2145 ev_stat_start (EV_P_ ev_stat *w)
2146 {
2147 if (expect_false (ev_is_active (w)))
2148 return;
2149
2150 /* since we use memcmp, we need to clear any padding data etc. */
2151 memset (&w->prev, 0, sizeof (ev_statdata));
2152 memset (&w->attr, 0, sizeof (ev_statdata));
2153
2154 ev_stat_stat (EV_A_ w);
2155
2156 if (w->interval < MIN_STAT_INTERVAL)
2157 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2158
2159 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2160 ev_set_priority (&w->timer, ev_priority (w));
2161
2162 #if EV_USE_INOTIFY
2163 infy_init (EV_A);
2164
2165 if (fs_fd >= 0)
2166 infy_add (EV_A_ w);
2167 else
2168 #endif
2169 ev_timer_start (EV_A_ &w->timer);
2170
2171 ev_start (EV_A_ (W)w, 1);
2172 }
2173
2174 void
2175 ev_stat_stop (EV_P_ ev_stat *w)
2176 {
2177 clear_pending (EV_A_ (W)w);
2178 if (expect_false (!ev_is_active (w)))
2179 return;
2180
2181 #if EV_USE_INOTIFY
2182 infy_del (EV_A_ w);
2183 #endif
2184 ev_timer_stop (EV_A_ &w->timer);
2185
2186 ev_stop (EV_A_ (W)w);
2187 }
2188 #endif
2189
2190 #if EV_IDLE_ENABLE
2191 void
2192 ev_idle_start (EV_P_ ev_idle *w)
2193 {
2194 if (expect_false (ev_is_active (w)))
2195 return;
2196
2197 pri_adjust (EV_A_ (W)w);
2198
2199 {
2200 int active = ++idlecnt [ABSPRI (w)];
2201
2202 ++idleall;
2203 ev_start (EV_A_ (W)w, active);
2204
2205 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2206 idles [ABSPRI (w)][active - 1] = w;
2207 }
2208 }
2209
2210 void
2211 ev_idle_stop (EV_P_ ev_idle *w)
2212 {
2213 clear_pending (EV_A_ (W)w);
2214 if (expect_false (!ev_is_active (w)))
2215 return;
2216
2217 {
2218 int active = ((W)w)->active;
2219
2220 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2221 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2222
2223 ev_stop (EV_A_ (W)w);
2224 --idleall;
2225 }
2226 }
2227 #endif
2228
2229 void
2230 ev_prepare_start (EV_P_ ev_prepare *w)
2231 {
2232 if (expect_false (ev_is_active (w)))
2233 return;
2234
2235 ev_start (EV_A_ (W)w, ++preparecnt);
2236 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2237 prepares [preparecnt - 1] = w;
2238 }
2239
2240 void
2241 ev_prepare_stop (EV_P_ ev_prepare *w)
2242 {
2243 clear_pending (EV_A_ (W)w);
2244 if (expect_false (!ev_is_active (w)))
2245 return;
2246
2247 {
2248 int active = ((W)w)->active;
2249 prepares [active - 1] = prepares [--preparecnt];
2250 ((W)prepares [active - 1])->active = active;
2251 }
2252
2253 ev_stop (EV_A_ (W)w);
2254 }
2255
2256 void
2257 ev_check_start (EV_P_ ev_check *w)
2258 {
2259 if (expect_false (ev_is_active (w)))
2260 return;
2261
2262 ev_start (EV_A_ (W)w, ++checkcnt);
2263 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2264 checks [checkcnt - 1] = w;
2265 }
2266
2267 void
2268 ev_check_stop (EV_P_ ev_check *w)
2269 {
2270 clear_pending (EV_A_ (W)w);
2271 if (expect_false (!ev_is_active (w)))
2272 return;
2273
2274 {
2275 int active = ((W)w)->active;
2276 checks [active - 1] = checks [--checkcnt];
2277 ((W)checks [active - 1])->active = active;
2278 }
2279
2280 ev_stop (EV_A_ (W)w);
2281 }
2282
2283 #if EV_EMBED_ENABLE
2284 void noinline
2285 ev_embed_sweep (EV_P_ ev_embed *w)
2286 {
2287 ev_loop (w->other, EVLOOP_NONBLOCK);
2288 }
2289
2290 static void
2291 embed_io_cb (EV_P_ ev_io *io, int revents)
2292 {
2293 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2294
2295 if (ev_cb (w))
2296 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2297 else
2298 ev_loop (w->other, EVLOOP_NONBLOCK);
2299 }
2300
2301 static void
2302 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2303 {
2304 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2305
2306 {
2307 struct ev_loop *loop = w->other;
2308
2309 while (fdchangecnt)
2310 {
2311 fd_reify (EV_A);
2312 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2313 }
2314 }
2315 }
2316
2317 #if 0
2318 static void
2319 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2320 {
2321 ev_idle_stop (EV_A_ idle);
2322 }
2323 #endif
2324
2325 void
2326 ev_embed_start (EV_P_ ev_embed *w)
2327 {
2328 if (expect_false (ev_is_active (w)))
2329 return;
2330
2331 {
2332 struct ev_loop *loop = w->other;
2333 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2334 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2335 }
2336
2337 ev_set_priority (&w->io, ev_priority (w));
2338 ev_io_start (EV_A_ &w->io);
2339
2340 ev_prepare_init (&w->prepare, embed_prepare_cb);
2341 ev_set_priority (&w->prepare, EV_MINPRI);
2342 ev_prepare_start (EV_A_ &w->prepare);
2343
2344 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2345
2346 ev_start (EV_A_ (W)w, 1);
2347 }
2348
2349 void
2350 ev_embed_stop (EV_P_ ev_embed *w)
2351 {
2352 clear_pending (EV_A_ (W)w);
2353 if (expect_false (!ev_is_active (w)))
2354 return;
2355
2356 ev_io_stop (EV_A_ &w->io);
2357 ev_prepare_stop (EV_A_ &w->prepare);
2358
2359 ev_stop (EV_A_ (W)w);
2360 }
2361 #endif
2362
2363 #if EV_FORK_ENABLE
2364 void
2365 ev_fork_start (EV_P_ ev_fork *w)
2366 {
2367 if (expect_false (ev_is_active (w)))
2368 return;
2369
2370 ev_start (EV_A_ (W)w, ++forkcnt);
2371 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2372 forks [forkcnt - 1] = w;
2373 }
2374
2375 void
2376 ev_fork_stop (EV_P_ ev_fork *w)
2377 {
2378 clear_pending (EV_A_ (W)w);
2379 if (expect_false (!ev_is_active (w)))
2380 return;
2381
2382 {
2383 int active = ((W)w)->active;
2384 forks [active - 1] = forks [--forkcnt];
2385 ((W)forks [active - 1])->active = active;
2386 }
2387
2388 ev_stop (EV_A_ (W)w);
2389 }
2390 #endif
2391
2392 /*****************************************************************************/
2393
2394 struct ev_once
2395 {
2396 ev_io io;
2397 ev_timer to;
2398 void (*cb)(int revents, void *arg);
2399 void *arg;
2400 };
2401
2402 static void
2403 once_cb (EV_P_ struct ev_once *once, int revents)
2404 {
2405 void (*cb)(int revents, void *arg) = once->cb;
2406 void *arg = once->arg;
2407
2408 ev_io_stop (EV_A_ &once->io);
2409 ev_timer_stop (EV_A_ &once->to);
2410 ev_free (once);
2411
2412 cb (revents, arg);
2413 }
2414
2415 static void
2416 once_cb_io (EV_P_ ev_io *w, int revents)
2417 {
2418 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
2419 }
2420
2421 static void
2422 once_cb_to (EV_P_ ev_timer *w, int revents)
2423 {
2424 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
2425 }
2426
2427 void
2428 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2429 {
2430 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2431
2432 if (expect_false (!once))
2433 {
2434 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2435 return;
2436 }
2437
2438 once->cb = cb;
2439 once->arg = arg;
2440
2441 ev_init (&once->io, once_cb_io);
2442 if (fd >= 0)
2443 {
2444 ev_io_set (&once->io, fd, events);
2445 ev_io_start (EV_A_ &once->io);
2446 }
2447
2448 ev_init (&once->to, once_cb_to);
2449 if (timeout >= 0.)
2450 {
2451 ev_timer_set (&once->to, timeout, 0.);
2452 ev_timer_start (EV_A_ &once->to);
2453 }
2454 }
2455
2456 #if EV_MULTIPLICITY
2457 #include "ev_wrap.h"
2458 #endif
2459
2460 #ifdef __cplusplus
2461 }
2462 #endif
2463