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Revision: 1.215
Committed: Thu Feb 21 10:34:15 2008 UTC (16 years, 5 months ago) by ayin
Content type: text/plain
Branch: MAIN
Changes since 1.214: +1 -1 lines
Log Message:
Fix typo.

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 #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 EV_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 EV_ATOMIC_T gotsig;
769 } ANSIG;
770
771 static ANSIG *signals;
772 static int signalmax;
773
774 static EV_ATOMIC_T gotsig;
775
776 void inline_size
777 signals_init (ANSIG *base, int count)
778 {
779 while (count--)
780 {
781 base->head = 0;
782 base->gotsig = 0;
783
784 ++base;
785 }
786 }
787
788 /*****************************************************************************/
789
790 void inline_speed
791 fd_intern (int fd)
792 {
793 #ifdef _WIN32
794 int arg = 1;
795 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
796 #else
797 fcntl (fd, F_SETFD, FD_CLOEXEC);
798 fcntl (fd, F_SETFL, O_NONBLOCK);
799 #endif
800 }
801
802 static void noinline
803 evpipe_init (EV_P)
804 {
805 if (!ev_is_active (&pipeev))
806 {
807 while (pipe (evpipe))
808 syserr ("(libev) error creating signal/async pipe");
809
810 fd_intern (evpipe [0]);
811 fd_intern (evpipe [1]);
812
813 ev_io_set (&pipeev, evpipe [0], EV_READ);
814 ev_io_start (EV_A_ &pipeev);
815 ev_unref (EV_A); /* watcher should not keep loop alive */
816 }
817 }
818
819 void inline_size
820 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
821 {
822 if (!*flag)
823 {
824 int old_errno = errno; /* save errno because write might clobber it */
825
826 *flag = 1;
827 write (evpipe [1], &old_errno, 1);
828
829 errno = old_errno;
830 }
831 }
832
833 static void
834 pipecb (EV_P_ ev_io *iow, int revents)
835 {
836 {
837 int dummy;
838 read (evpipe [0], &dummy, 1);
839 }
840
841 if (gotsig && ev_is_default_loop (EV_A))
842 {
843 int signum;
844 gotsig = 0;
845
846 for (signum = signalmax; signum--; )
847 if (signals [signum].gotsig)
848 ev_feed_signal_event (EV_A_ signum + 1);
849 }
850
851 #if EV_ASYNC_ENABLE
852 if (gotasync)
853 {
854 int i;
855 gotasync = 0;
856
857 for (i = asynccnt; i--; )
858 if (asyncs [i]->sent)
859 {
860 asyncs [i]->sent = 0;
861 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
862 }
863 }
864 #endif
865 }
866
867 /*****************************************************************************/
868
869 static void
870 sighandler (int signum)
871 {
872 #if EV_MULTIPLICITY
873 struct ev_loop *loop = &default_loop_struct;
874 #endif
875
876 #if _WIN32
877 signal (signum, sighandler);
878 #endif
879
880 signals [signum - 1].gotsig = 1;
881 evpipe_write (EV_A_ &gotsig);
882 }
883
884 void noinline
885 ev_feed_signal_event (EV_P_ int signum)
886 {
887 WL w;
888
889 #if EV_MULTIPLICITY
890 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
891 #endif
892
893 --signum;
894
895 if (signum < 0 || signum >= signalmax)
896 return;
897
898 signals [signum].gotsig = 0;
899
900 for (w = signals [signum].head; w; w = w->next)
901 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
902 }
903
904 /*****************************************************************************/
905
906 static WL childs [EV_PID_HASHSIZE];
907
908 #ifndef _WIN32
909
910 static ev_signal childev;
911
912 #ifndef WIFCONTINUED
913 # define WIFCONTINUED(status) 0
914 #endif
915
916 void inline_speed
917 child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
918 {
919 ev_child *w;
920 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
921
922 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
923 {
924 if ((w->pid == pid || !w->pid)
925 && (!traced || (w->flags & 1)))
926 {
927 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
928 w->rpid = pid;
929 w->rstatus = status;
930 ev_feed_event (EV_A_ (W)w, EV_CHILD);
931 }
932 }
933 }
934
935 #ifndef WCONTINUED
936 # define WCONTINUED 0
937 #endif
938
939 static void
940 childcb (EV_P_ ev_signal *sw, int revents)
941 {
942 int pid, status;
943
944 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
945 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
946 if (!WCONTINUED
947 || errno != EINVAL
948 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
949 return;
950
951 /* make sure we are called again until all childs have been reaped */
952 /* we need to do it this way so that the callback gets called before we continue */
953 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
954
955 child_reap (EV_A_ sw, pid, pid, status);
956 if (EV_PID_HASHSIZE > 1)
957 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
958 }
959
960 #endif
961
962 /*****************************************************************************/
963
964 #if EV_USE_PORT
965 # include "ev_port.c"
966 #endif
967 #if EV_USE_KQUEUE
968 # include "ev_kqueue.c"
969 #endif
970 #if EV_USE_EPOLL
971 # include "ev_epoll.c"
972 #endif
973 #if EV_USE_POLL
974 # include "ev_poll.c"
975 #endif
976 #if EV_USE_SELECT
977 # include "ev_select.c"
978 #endif
979
980 int
981 ev_version_major (void)
982 {
983 return EV_VERSION_MAJOR;
984 }
985
986 int
987 ev_version_minor (void)
988 {
989 return EV_VERSION_MINOR;
990 }
991
992 /* return true if we are running with elevated privileges and should ignore env variables */
993 int inline_size
994 enable_secure (void)
995 {
996 #ifdef _WIN32
997 return 0;
998 #else
999 return getuid () != geteuid ()
1000 || getgid () != getegid ();
1001 #endif
1002 }
1003
1004 unsigned int
1005 ev_supported_backends (void)
1006 {
1007 unsigned int flags = 0;
1008
1009 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1010 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1011 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1012 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1013 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1014
1015 return flags;
1016 }
1017
1018 unsigned int
1019 ev_recommended_backends (void)
1020 {
1021 unsigned int flags = ev_supported_backends ();
1022
1023 #ifndef __NetBSD__
1024 /* kqueue is borked on everything but netbsd apparently */
1025 /* it usually doesn't work correctly on anything but sockets and pipes */
1026 flags &= ~EVBACKEND_KQUEUE;
1027 #endif
1028 #ifdef __APPLE__
1029 // flags &= ~EVBACKEND_KQUEUE; for documentation
1030 flags &= ~EVBACKEND_POLL;
1031 #endif
1032
1033 return flags;
1034 }
1035
1036 unsigned int
1037 ev_embeddable_backends (void)
1038 {
1039 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1040
1041 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1042 /* please fix it and tell me how to detect the fix */
1043 flags &= ~EVBACKEND_EPOLL;
1044
1045 return flags;
1046 }
1047
1048 unsigned int
1049 ev_backend (EV_P)
1050 {
1051 return backend;
1052 }
1053
1054 unsigned int
1055 ev_loop_count (EV_P)
1056 {
1057 return loop_count;
1058 }
1059
1060 void
1061 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1062 {
1063 io_blocktime = interval;
1064 }
1065
1066 void
1067 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1068 {
1069 timeout_blocktime = interval;
1070 }
1071
1072 static void noinline
1073 loop_init (EV_P_ unsigned int flags)
1074 {
1075 if (!backend)
1076 {
1077 #if EV_USE_MONOTONIC
1078 {
1079 struct timespec ts;
1080 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1081 have_monotonic = 1;
1082 }
1083 #endif
1084
1085 ev_rt_now = ev_time ();
1086 mn_now = get_clock ();
1087 now_floor = mn_now;
1088 rtmn_diff = ev_rt_now - mn_now;
1089
1090 io_blocktime = 0.;
1091 timeout_blocktime = 0.;
1092 backend = 0;
1093 backend_fd = -1;
1094 gotasync = 0;
1095 #if EV_USE_INOTIFY
1096 fs_fd = -2;
1097 #endif
1098
1099 /* pid check not overridable via env */
1100 #ifndef _WIN32
1101 if (flags & EVFLAG_FORKCHECK)
1102 curpid = getpid ();
1103 #endif
1104
1105 if (!(flags & EVFLAG_NOENV)
1106 && !enable_secure ()
1107 && getenv ("LIBEV_FLAGS"))
1108 flags = atoi (getenv ("LIBEV_FLAGS"));
1109
1110 if (!(flags & 0x0000ffffUL))
1111 flags |= ev_recommended_backends ();
1112
1113 #if EV_USE_PORT
1114 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1115 #endif
1116 #if EV_USE_KQUEUE
1117 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1118 #endif
1119 #if EV_USE_EPOLL
1120 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1121 #endif
1122 #if EV_USE_POLL
1123 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1124 #endif
1125 #if EV_USE_SELECT
1126 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1127 #endif
1128
1129 ev_init (&pipeev, pipecb);
1130 ev_set_priority (&pipeev, EV_MAXPRI);
1131 }
1132 }
1133
1134 static void noinline
1135 loop_destroy (EV_P)
1136 {
1137 int i;
1138
1139 if (ev_is_active (&pipeev))
1140 {
1141 ev_ref (EV_A); /* signal watcher */
1142 ev_io_stop (EV_A_ &pipeev);
1143
1144 close (evpipe [0]); evpipe [0] = 0;
1145 close (evpipe [1]); evpipe [1] = 0;
1146 }
1147
1148 #if EV_USE_INOTIFY
1149 if (fs_fd >= 0)
1150 close (fs_fd);
1151 #endif
1152
1153 if (backend_fd >= 0)
1154 close (backend_fd);
1155
1156 #if EV_USE_PORT
1157 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1158 #endif
1159 #if EV_USE_KQUEUE
1160 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1161 #endif
1162 #if EV_USE_EPOLL
1163 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1164 #endif
1165 #if EV_USE_POLL
1166 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1167 #endif
1168 #if EV_USE_SELECT
1169 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1170 #endif
1171
1172 for (i = NUMPRI; i--; )
1173 {
1174 array_free (pending, [i]);
1175 #if EV_IDLE_ENABLE
1176 array_free (idle, [i]);
1177 #endif
1178 }
1179
1180 ev_free (anfds); anfdmax = 0;
1181
1182 /* have to use the microsoft-never-gets-it-right macro */
1183 array_free (fdchange, EMPTY);
1184 array_free (timer, EMPTY);
1185 #if EV_PERIODIC_ENABLE
1186 array_free (periodic, EMPTY);
1187 #endif
1188 #if EV_FORK_ENABLE
1189 array_free (fork, EMPTY);
1190 #endif
1191 array_free (prepare, EMPTY);
1192 array_free (check, EMPTY);
1193 #if EV_ASYNC_ENABLE
1194 array_free (async, EMPTY);
1195 #endif
1196
1197 backend = 0;
1198 }
1199
1200 void inline_size infy_fork (EV_P);
1201
1202 void inline_size
1203 loop_fork (EV_P)
1204 {
1205 #if EV_USE_PORT
1206 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1207 #endif
1208 #if EV_USE_KQUEUE
1209 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1210 #endif
1211 #if EV_USE_EPOLL
1212 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1213 #endif
1214 #if EV_USE_INOTIFY
1215 infy_fork (EV_A);
1216 #endif
1217
1218 if (ev_is_active (&pipeev))
1219 {
1220 /* this "locks" the handlers against writing to the pipe */
1221 /* while we modify the fd vars */
1222 gotsig = 1;
1223 #if EV_ASYNC_ENABLE
1224 gotasync = 1;
1225 #endif
1226
1227 ev_ref (EV_A);
1228 ev_io_stop (EV_A_ &pipeev);
1229 close (evpipe [0]);
1230 close (evpipe [1]);
1231
1232 evpipe_init (EV_A);
1233 /* now iterate over everything, in case we missed something */
1234 pipecb (EV_A_ &pipeev, EV_READ);
1235 }
1236
1237 postfork = 0;
1238 }
1239
1240 #if EV_MULTIPLICITY
1241 struct ev_loop *
1242 ev_loop_new (unsigned int flags)
1243 {
1244 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1245
1246 memset (loop, 0, sizeof (struct ev_loop));
1247
1248 loop_init (EV_A_ flags);
1249
1250 if (ev_backend (EV_A))
1251 return loop;
1252
1253 return 0;
1254 }
1255
1256 void
1257 ev_loop_destroy (EV_P)
1258 {
1259 loop_destroy (EV_A);
1260 ev_free (loop);
1261 }
1262
1263 void
1264 ev_loop_fork (EV_P)
1265 {
1266 postfork = 1; /* must be in line with ev_default_fork */
1267 }
1268
1269 #endif
1270
1271 #if EV_MULTIPLICITY
1272 struct ev_loop *
1273 ev_default_loop_init (unsigned int flags)
1274 #else
1275 int
1276 ev_default_loop (unsigned int flags)
1277 #endif
1278 {
1279 if (!ev_default_loop_ptr)
1280 {
1281 #if EV_MULTIPLICITY
1282 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1283 #else
1284 ev_default_loop_ptr = 1;
1285 #endif
1286
1287 loop_init (EV_A_ flags);
1288
1289 if (ev_backend (EV_A))
1290 {
1291 #ifndef _WIN32
1292 ev_signal_init (&childev, childcb, SIGCHLD);
1293 ev_set_priority (&childev, EV_MAXPRI);
1294 ev_signal_start (EV_A_ &childev);
1295 ev_unref (EV_A); /* child watcher should not keep loop alive */
1296 #endif
1297 }
1298 else
1299 ev_default_loop_ptr = 0;
1300 }
1301
1302 return ev_default_loop_ptr;
1303 }
1304
1305 void
1306 ev_default_destroy (void)
1307 {
1308 #if EV_MULTIPLICITY
1309 struct ev_loop *loop = ev_default_loop_ptr;
1310 #endif
1311
1312 #ifndef _WIN32
1313 ev_ref (EV_A); /* child watcher */
1314 ev_signal_stop (EV_A_ &childev);
1315 #endif
1316
1317 loop_destroy (EV_A);
1318 }
1319
1320 void
1321 ev_default_fork (void)
1322 {
1323 #if EV_MULTIPLICITY
1324 struct ev_loop *loop = ev_default_loop_ptr;
1325 #endif
1326
1327 if (backend)
1328 postfork = 1; /* must be in line with ev_loop_fork */
1329 }
1330
1331 /*****************************************************************************/
1332
1333 void
1334 ev_invoke (EV_P_ void *w, int revents)
1335 {
1336 EV_CB_INVOKE ((W)w, revents);
1337 }
1338
1339 void inline_speed
1340 call_pending (EV_P)
1341 {
1342 int pri;
1343
1344 for (pri = NUMPRI; pri--; )
1345 while (pendingcnt [pri])
1346 {
1347 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1348
1349 if (expect_true (p->w))
1350 {
1351 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1352
1353 p->w->pending = 0;
1354 EV_CB_INVOKE (p->w, p->events);
1355 }
1356 }
1357 }
1358
1359 void inline_size
1360 timers_reify (EV_P)
1361 {
1362 while (timercnt && ((WT)timers [0])->at <= mn_now)
1363 {
1364 ev_timer *w = (ev_timer *)timers [0];
1365
1366 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1367
1368 /* first reschedule or stop timer */
1369 if (w->repeat)
1370 {
1371 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1372
1373 ((WT)w)->at += w->repeat;
1374 if (((WT)w)->at < mn_now)
1375 ((WT)w)->at = mn_now;
1376
1377 downheap (timers, timercnt, 0);
1378 }
1379 else
1380 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1381
1382 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1383 }
1384 }
1385
1386 #if EV_PERIODIC_ENABLE
1387 void inline_size
1388 periodics_reify (EV_P)
1389 {
1390 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1391 {
1392 ev_periodic *w = (ev_periodic *)periodics [0];
1393
1394 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1395
1396 /* first reschedule or stop timer */
1397 if (w->reschedule_cb)
1398 {
1399 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1400 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1401 downheap (periodics, periodiccnt, 0);
1402 }
1403 else if (w->interval)
1404 {
1405 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1406 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1407 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1408 downheap (periodics, periodiccnt, 0);
1409 }
1410 else
1411 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1412
1413 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1414 }
1415 }
1416
1417 static void noinline
1418 periodics_reschedule (EV_P)
1419 {
1420 int i;
1421
1422 /* adjust periodics after time jump */
1423 for (i = 0; i < periodiccnt; ++i)
1424 {
1425 ev_periodic *w = (ev_periodic *)periodics [i];
1426
1427 if (w->reschedule_cb)
1428 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1429 else if (w->interval)
1430 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1431 }
1432
1433 /* now rebuild the heap */
1434 for (i = periodiccnt >> 1; i--; )
1435 downheap (periodics, periodiccnt, i);
1436 }
1437 #endif
1438
1439 #if EV_IDLE_ENABLE
1440 void inline_size
1441 idle_reify (EV_P)
1442 {
1443 if (expect_false (idleall))
1444 {
1445 int pri;
1446
1447 for (pri = NUMPRI; pri--; )
1448 {
1449 if (pendingcnt [pri])
1450 break;
1451
1452 if (idlecnt [pri])
1453 {
1454 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1455 break;
1456 }
1457 }
1458 }
1459 }
1460 #endif
1461
1462 void inline_speed
1463 time_update (EV_P_ ev_tstamp max_block)
1464 {
1465 int i;
1466
1467 #if EV_USE_MONOTONIC
1468 if (expect_true (have_monotonic))
1469 {
1470 ev_tstamp odiff = rtmn_diff;
1471
1472 mn_now = get_clock ();
1473
1474 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1475 /* interpolate in the meantime */
1476 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1477 {
1478 ev_rt_now = rtmn_diff + mn_now;
1479 return;
1480 }
1481
1482 now_floor = mn_now;
1483 ev_rt_now = ev_time ();
1484
1485 /* loop a few times, before making important decisions.
1486 * on the choice of "4": one iteration isn't enough,
1487 * in case we get preempted during the calls to
1488 * ev_time and get_clock. a second call is almost guaranteed
1489 * to succeed in that case, though. and looping a few more times
1490 * doesn't hurt either as we only do this on time-jumps or
1491 * in the unlikely event of having been preempted here.
1492 */
1493 for (i = 4; --i; )
1494 {
1495 rtmn_diff = ev_rt_now - mn_now;
1496
1497 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1498 return; /* all is well */
1499
1500 ev_rt_now = ev_time ();
1501 mn_now = get_clock ();
1502 now_floor = mn_now;
1503 }
1504
1505 # if EV_PERIODIC_ENABLE
1506 periodics_reschedule (EV_A);
1507 # endif
1508 /* no timer adjustment, as the monotonic clock doesn't jump */
1509 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1510 }
1511 else
1512 #endif
1513 {
1514 ev_rt_now = ev_time ();
1515
1516 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1517 {
1518 #if EV_PERIODIC_ENABLE
1519 periodics_reschedule (EV_A);
1520 #endif
1521 /* adjust timers. this is easy, as the offset is the same for all of them */
1522 for (i = 0; i < timercnt; ++i)
1523 ((WT)timers [i])->at += ev_rt_now - mn_now;
1524 }
1525
1526 mn_now = ev_rt_now;
1527 }
1528 }
1529
1530 void
1531 ev_ref (EV_P)
1532 {
1533 ++activecnt;
1534 }
1535
1536 void
1537 ev_unref (EV_P)
1538 {
1539 --activecnt;
1540 }
1541
1542 static int loop_done;
1543
1544 void
1545 ev_loop (EV_P_ int flags)
1546 {
1547 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
1548 ? EVUNLOOP_ONE
1549 : EVUNLOOP_CANCEL;
1550
1551 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1552
1553 do
1554 {
1555 #ifndef _WIN32
1556 if (expect_false (curpid)) /* penalise the forking check even more */
1557 if (expect_false (getpid () != curpid))
1558 {
1559 curpid = getpid ();
1560 postfork = 1;
1561 }
1562 #endif
1563
1564 #if EV_FORK_ENABLE
1565 /* we might have forked, so queue fork handlers */
1566 if (expect_false (postfork))
1567 if (forkcnt)
1568 {
1569 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1570 call_pending (EV_A);
1571 }
1572 #endif
1573
1574 /* queue prepare watchers (and execute them) */
1575 if (expect_false (preparecnt))
1576 {
1577 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1578 call_pending (EV_A);
1579 }
1580
1581 if (expect_false (!activecnt))
1582 break;
1583
1584 /* we might have forked, so reify kernel state if necessary */
1585 if (expect_false (postfork))
1586 loop_fork (EV_A);
1587
1588 /* update fd-related kernel structures */
1589 fd_reify (EV_A);
1590
1591 /* calculate blocking time */
1592 {
1593 ev_tstamp waittime = 0.;
1594 ev_tstamp sleeptime = 0.;
1595
1596 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1597 {
1598 /* update time to cancel out callback processing overhead */
1599 time_update (EV_A_ 1e100);
1600
1601 waittime = MAX_BLOCKTIME;
1602
1603 if (timercnt)
1604 {
1605 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1606 if (waittime > to) waittime = to;
1607 }
1608
1609 #if EV_PERIODIC_ENABLE
1610 if (periodiccnt)
1611 {
1612 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1613 if (waittime > to) waittime = to;
1614 }
1615 #endif
1616
1617 if (expect_false (waittime < timeout_blocktime))
1618 waittime = timeout_blocktime;
1619
1620 sleeptime = waittime - backend_fudge;
1621
1622 if (expect_true (sleeptime > io_blocktime))
1623 sleeptime = io_blocktime;
1624
1625 if (sleeptime)
1626 {
1627 ev_sleep (sleeptime);
1628 waittime -= sleeptime;
1629 }
1630 }
1631
1632 ++loop_count;
1633 backend_poll (EV_A_ waittime);
1634
1635 /* update ev_rt_now, do magic */
1636 time_update (EV_A_ waittime + sleeptime);
1637 }
1638
1639 /* queue pending timers and reschedule them */
1640 timers_reify (EV_A); /* relative timers called last */
1641 #if EV_PERIODIC_ENABLE
1642 periodics_reify (EV_A); /* absolute timers called first */
1643 #endif
1644
1645 #if EV_IDLE_ENABLE
1646 /* queue idle watchers unless other events are pending */
1647 idle_reify (EV_A);
1648 #endif
1649
1650 /* queue check watchers, to be executed first */
1651 if (expect_false (checkcnt))
1652 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1653
1654 call_pending (EV_A);
1655
1656 }
1657 while (expect_true (activecnt && !loop_done));
1658
1659 if (loop_done == EVUNLOOP_ONE)
1660 loop_done = EVUNLOOP_CANCEL;
1661 }
1662
1663 void
1664 ev_unloop (EV_P_ int how)
1665 {
1666 loop_done = how;
1667 }
1668
1669 /*****************************************************************************/
1670
1671 void inline_size
1672 wlist_add (WL *head, WL elem)
1673 {
1674 elem->next = *head;
1675 *head = elem;
1676 }
1677
1678 void inline_size
1679 wlist_del (WL *head, WL elem)
1680 {
1681 while (*head)
1682 {
1683 if (*head == elem)
1684 {
1685 *head = elem->next;
1686 return;
1687 }
1688
1689 head = &(*head)->next;
1690 }
1691 }
1692
1693 void inline_speed
1694 clear_pending (EV_P_ W w)
1695 {
1696 if (w->pending)
1697 {
1698 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1699 w->pending = 0;
1700 }
1701 }
1702
1703 int
1704 ev_clear_pending (EV_P_ void *w)
1705 {
1706 W w_ = (W)w;
1707 int pending = w_->pending;
1708
1709 if (expect_true (pending))
1710 {
1711 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1712 w_->pending = 0;
1713 p->w = 0;
1714 return p->events;
1715 }
1716 else
1717 return 0;
1718 }
1719
1720 void inline_size
1721 pri_adjust (EV_P_ W w)
1722 {
1723 int pri = w->priority;
1724 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1725 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1726 w->priority = pri;
1727 }
1728
1729 void inline_speed
1730 ev_start (EV_P_ W w, int active)
1731 {
1732 pri_adjust (EV_A_ w);
1733 w->active = active;
1734 ev_ref (EV_A);
1735 }
1736
1737 void inline_size
1738 ev_stop (EV_P_ W w)
1739 {
1740 ev_unref (EV_A);
1741 w->active = 0;
1742 }
1743
1744 /*****************************************************************************/
1745
1746 void noinline
1747 ev_io_start (EV_P_ ev_io *w)
1748 {
1749 int fd = w->fd;
1750
1751 if (expect_false (ev_is_active (w)))
1752 return;
1753
1754 assert (("ev_io_start called with negative fd", fd >= 0));
1755
1756 ev_start (EV_A_ (W)w, 1);
1757 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1758 wlist_add (&anfds[fd].head, (WL)w);
1759
1760 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1761 w->events &= ~EV_IOFDSET;
1762 }
1763
1764 void noinline
1765 ev_io_stop (EV_P_ ev_io *w)
1766 {
1767 clear_pending (EV_A_ (W)w);
1768 if (expect_false (!ev_is_active (w)))
1769 return;
1770
1771 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1772
1773 wlist_del (&anfds[w->fd].head, (WL)w);
1774 ev_stop (EV_A_ (W)w);
1775
1776 fd_change (EV_A_ w->fd, 1);
1777 }
1778
1779 void noinline
1780 ev_timer_start (EV_P_ ev_timer *w)
1781 {
1782 if (expect_false (ev_is_active (w)))
1783 return;
1784
1785 ((WT)w)->at += mn_now;
1786
1787 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1788
1789 ev_start (EV_A_ (W)w, ++timercnt);
1790 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1791 timers [timercnt - 1] = (WT)w;
1792 upheap (timers, timercnt - 1);
1793
1794 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1795 }
1796
1797 void noinline
1798 ev_timer_stop (EV_P_ ev_timer *w)
1799 {
1800 clear_pending (EV_A_ (W)w);
1801 if (expect_false (!ev_is_active (w)))
1802 return;
1803
1804 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1805
1806 {
1807 int active = ((W)w)->active;
1808
1809 if (expect_true (--active < --timercnt))
1810 {
1811 timers [active] = timers [timercnt];
1812 adjustheap (timers, timercnt, active);
1813 }
1814 }
1815
1816 ((WT)w)->at -= mn_now;
1817
1818 ev_stop (EV_A_ (W)w);
1819 }
1820
1821 void noinline
1822 ev_timer_again (EV_P_ ev_timer *w)
1823 {
1824 if (ev_is_active (w))
1825 {
1826 if (w->repeat)
1827 {
1828 ((WT)w)->at = mn_now + w->repeat;
1829 adjustheap (timers, timercnt, ((W)w)->active - 1);
1830 }
1831 else
1832 ev_timer_stop (EV_A_ w);
1833 }
1834 else if (w->repeat)
1835 {
1836 w->at = w->repeat;
1837 ev_timer_start (EV_A_ w);
1838 }
1839 }
1840
1841 #if EV_PERIODIC_ENABLE
1842 void noinline
1843 ev_periodic_start (EV_P_ ev_periodic *w)
1844 {
1845 if (expect_false (ev_is_active (w)))
1846 return;
1847
1848 if (w->reschedule_cb)
1849 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1850 else if (w->interval)
1851 {
1852 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1853 /* this formula differs from the one in periodic_reify because we do not always round up */
1854 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1855 }
1856 else
1857 ((WT)w)->at = w->offset;
1858
1859 ev_start (EV_A_ (W)w, ++periodiccnt);
1860 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1861 periodics [periodiccnt - 1] = (WT)w;
1862 upheap (periodics, periodiccnt - 1);
1863
1864 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1865 }
1866
1867 void noinline
1868 ev_periodic_stop (EV_P_ ev_periodic *w)
1869 {
1870 clear_pending (EV_A_ (W)w);
1871 if (expect_false (!ev_is_active (w)))
1872 return;
1873
1874 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1875
1876 {
1877 int active = ((W)w)->active;
1878
1879 if (expect_true (--active < --periodiccnt))
1880 {
1881 periodics [active] = periodics [periodiccnt];
1882 adjustheap (periodics, periodiccnt, active);
1883 }
1884 }
1885
1886 ev_stop (EV_A_ (W)w);
1887 }
1888
1889 void noinline
1890 ev_periodic_again (EV_P_ ev_periodic *w)
1891 {
1892 /* TODO: use adjustheap and recalculation */
1893 ev_periodic_stop (EV_A_ w);
1894 ev_periodic_start (EV_A_ w);
1895 }
1896 #endif
1897
1898 #ifndef SA_RESTART
1899 # define SA_RESTART 0
1900 #endif
1901
1902 void noinline
1903 ev_signal_start (EV_P_ ev_signal *w)
1904 {
1905 #if EV_MULTIPLICITY
1906 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1907 #endif
1908 if (expect_false (ev_is_active (w)))
1909 return;
1910
1911 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1912
1913 evpipe_init (EV_A);
1914
1915 {
1916 #ifndef _WIN32
1917 sigset_t full, prev;
1918 sigfillset (&full);
1919 sigprocmask (SIG_SETMASK, &full, &prev);
1920 #endif
1921
1922 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1923
1924 #ifndef _WIN32
1925 sigprocmask (SIG_SETMASK, &prev, 0);
1926 #endif
1927 }
1928
1929 ev_start (EV_A_ (W)w, 1);
1930 wlist_add (&signals [w->signum - 1].head, (WL)w);
1931
1932 if (!((WL)w)->next)
1933 {
1934 #if _WIN32
1935 signal (w->signum, sighandler);
1936 #else
1937 struct sigaction sa;
1938 sa.sa_handler = sighandler;
1939 sigfillset (&sa.sa_mask);
1940 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1941 sigaction (w->signum, &sa, 0);
1942 #endif
1943 }
1944 }
1945
1946 void noinline
1947 ev_signal_stop (EV_P_ ev_signal *w)
1948 {
1949 clear_pending (EV_A_ (W)w);
1950 if (expect_false (!ev_is_active (w)))
1951 return;
1952
1953 wlist_del (&signals [w->signum - 1].head, (WL)w);
1954 ev_stop (EV_A_ (W)w);
1955
1956 if (!signals [w->signum - 1].head)
1957 signal (w->signum, SIG_DFL);
1958 }
1959
1960 void
1961 ev_child_start (EV_P_ ev_child *w)
1962 {
1963 #if EV_MULTIPLICITY
1964 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1965 #endif
1966 if (expect_false (ev_is_active (w)))
1967 return;
1968
1969 ev_start (EV_A_ (W)w, 1);
1970 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1971 }
1972
1973 void
1974 ev_child_stop (EV_P_ ev_child *w)
1975 {
1976 clear_pending (EV_A_ (W)w);
1977 if (expect_false (!ev_is_active (w)))
1978 return;
1979
1980 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1981 ev_stop (EV_A_ (W)w);
1982 }
1983
1984 #if EV_STAT_ENABLE
1985
1986 # ifdef _WIN32
1987 # undef lstat
1988 # define lstat(a,b) _stati64 (a,b)
1989 # endif
1990
1991 #define DEF_STAT_INTERVAL 5.0074891
1992 #define MIN_STAT_INTERVAL 0.1074891
1993
1994 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1995
1996 #if EV_USE_INOTIFY
1997 # define EV_INOTIFY_BUFSIZE 8192
1998
1999 static void noinline
2000 infy_add (EV_P_ ev_stat *w)
2001 {
2002 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);
2003
2004 if (w->wd < 0)
2005 {
2006 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2007
2008 /* monitor some parent directory for speedup hints */
2009 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2010 {
2011 char path [4096];
2012 strcpy (path, w->path);
2013
2014 do
2015 {
2016 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2017 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2018
2019 char *pend = strrchr (path, '/');
2020
2021 if (!pend)
2022 break; /* whoops, no '/', complain to your admin */
2023
2024 *pend = 0;
2025 w->wd = inotify_add_watch (fs_fd, path, mask);
2026 }
2027 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2028 }
2029 }
2030 else
2031 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2032
2033 if (w->wd >= 0)
2034 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2035 }
2036
2037 static void noinline
2038 infy_del (EV_P_ ev_stat *w)
2039 {
2040 int slot;
2041 int wd = w->wd;
2042
2043 if (wd < 0)
2044 return;
2045
2046 w->wd = -2;
2047 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2048 wlist_del (&fs_hash [slot].head, (WL)w);
2049
2050 /* remove this watcher, if others are watching it, they will rearm */
2051 inotify_rm_watch (fs_fd, wd);
2052 }
2053
2054 static void noinline
2055 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2056 {
2057 if (slot < 0)
2058 /* overflow, need to check for all hahs slots */
2059 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2060 infy_wd (EV_A_ slot, wd, ev);
2061 else
2062 {
2063 WL w_;
2064
2065 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2066 {
2067 ev_stat *w = (ev_stat *)w_;
2068 w_ = w_->next; /* lets us remove this watcher and all before it */
2069
2070 if (w->wd == wd || wd == -1)
2071 {
2072 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2073 {
2074 w->wd = -1;
2075 infy_add (EV_A_ w); /* re-add, no matter what */
2076 }
2077
2078 stat_timer_cb (EV_A_ &w->timer, 0);
2079 }
2080 }
2081 }
2082 }
2083
2084 static void
2085 infy_cb (EV_P_ ev_io *w, int revents)
2086 {
2087 char buf [EV_INOTIFY_BUFSIZE];
2088 struct inotify_event *ev = (struct inotify_event *)buf;
2089 int ofs;
2090 int len = read (fs_fd, buf, sizeof (buf));
2091
2092 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2093 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2094 }
2095
2096 void inline_size
2097 infy_init (EV_P)
2098 {
2099 if (fs_fd != -2)
2100 return;
2101
2102 fs_fd = inotify_init ();
2103
2104 if (fs_fd >= 0)
2105 {
2106 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2107 ev_set_priority (&fs_w, EV_MAXPRI);
2108 ev_io_start (EV_A_ &fs_w);
2109 }
2110 }
2111
2112 void inline_size
2113 infy_fork (EV_P)
2114 {
2115 int slot;
2116
2117 if (fs_fd < 0)
2118 return;
2119
2120 close (fs_fd);
2121 fs_fd = inotify_init ();
2122
2123 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2124 {
2125 WL w_ = fs_hash [slot].head;
2126 fs_hash [slot].head = 0;
2127
2128 while (w_)
2129 {
2130 ev_stat *w = (ev_stat *)w_;
2131 w_ = w_->next; /* lets us add this watcher */
2132
2133 w->wd = -1;
2134
2135 if (fs_fd >= 0)
2136 infy_add (EV_A_ w); /* re-add, no matter what */
2137 else
2138 ev_timer_start (EV_A_ &w->timer);
2139 }
2140
2141 }
2142 }
2143
2144 #endif
2145
2146 void
2147 ev_stat_stat (EV_P_ ev_stat *w)
2148 {
2149 if (lstat (w->path, &w->attr) < 0)
2150 w->attr.st_nlink = 0;
2151 else if (!w->attr.st_nlink)
2152 w->attr.st_nlink = 1;
2153 }
2154
2155 static void noinline
2156 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2157 {
2158 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2159
2160 /* we copy this here each the time so that */
2161 /* prev has the old value when the callback gets invoked */
2162 w->prev = w->attr;
2163 ev_stat_stat (EV_A_ w);
2164
2165 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2166 if (
2167 w->prev.st_dev != w->attr.st_dev
2168 || w->prev.st_ino != w->attr.st_ino
2169 || w->prev.st_mode != w->attr.st_mode
2170 || w->prev.st_nlink != w->attr.st_nlink
2171 || w->prev.st_uid != w->attr.st_uid
2172 || w->prev.st_gid != w->attr.st_gid
2173 || w->prev.st_rdev != w->attr.st_rdev
2174 || w->prev.st_size != w->attr.st_size
2175 || w->prev.st_atime != w->attr.st_atime
2176 || w->prev.st_mtime != w->attr.st_mtime
2177 || w->prev.st_ctime != w->attr.st_ctime
2178 ) {
2179 #if EV_USE_INOTIFY
2180 infy_del (EV_A_ w);
2181 infy_add (EV_A_ w);
2182 ev_stat_stat (EV_A_ w); /* avoid race... */
2183 #endif
2184
2185 ev_feed_event (EV_A_ w, EV_STAT);
2186 }
2187 }
2188
2189 void
2190 ev_stat_start (EV_P_ ev_stat *w)
2191 {
2192 if (expect_false (ev_is_active (w)))
2193 return;
2194
2195 /* since we use memcmp, we need to clear any padding data etc. */
2196 memset (&w->prev, 0, sizeof (ev_statdata));
2197 memset (&w->attr, 0, sizeof (ev_statdata));
2198
2199 ev_stat_stat (EV_A_ w);
2200
2201 if (w->interval < MIN_STAT_INTERVAL)
2202 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2203
2204 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2205 ev_set_priority (&w->timer, ev_priority (w));
2206
2207 #if EV_USE_INOTIFY
2208 infy_init (EV_A);
2209
2210 if (fs_fd >= 0)
2211 infy_add (EV_A_ w);
2212 else
2213 #endif
2214 ev_timer_start (EV_A_ &w->timer);
2215
2216 ev_start (EV_A_ (W)w, 1);
2217 }
2218
2219 void
2220 ev_stat_stop (EV_P_ ev_stat *w)
2221 {
2222 clear_pending (EV_A_ (W)w);
2223 if (expect_false (!ev_is_active (w)))
2224 return;
2225
2226 #if EV_USE_INOTIFY
2227 infy_del (EV_A_ w);
2228 #endif
2229 ev_timer_stop (EV_A_ &w->timer);
2230
2231 ev_stop (EV_A_ (W)w);
2232 }
2233 #endif
2234
2235 #if EV_IDLE_ENABLE
2236 void
2237 ev_idle_start (EV_P_ ev_idle *w)
2238 {
2239 if (expect_false (ev_is_active (w)))
2240 return;
2241
2242 pri_adjust (EV_A_ (W)w);
2243
2244 {
2245 int active = ++idlecnt [ABSPRI (w)];
2246
2247 ++idleall;
2248 ev_start (EV_A_ (W)w, active);
2249
2250 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2251 idles [ABSPRI (w)][active - 1] = w;
2252 }
2253 }
2254
2255 void
2256 ev_idle_stop (EV_P_ ev_idle *w)
2257 {
2258 clear_pending (EV_A_ (W)w);
2259 if (expect_false (!ev_is_active (w)))
2260 return;
2261
2262 {
2263 int active = ((W)w)->active;
2264
2265 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2266 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2267
2268 ev_stop (EV_A_ (W)w);
2269 --idleall;
2270 }
2271 }
2272 #endif
2273
2274 void
2275 ev_prepare_start (EV_P_ ev_prepare *w)
2276 {
2277 if (expect_false (ev_is_active (w)))
2278 return;
2279
2280 ev_start (EV_A_ (W)w, ++preparecnt);
2281 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2282 prepares [preparecnt - 1] = w;
2283 }
2284
2285 void
2286 ev_prepare_stop (EV_P_ ev_prepare *w)
2287 {
2288 clear_pending (EV_A_ (W)w);
2289 if (expect_false (!ev_is_active (w)))
2290 return;
2291
2292 {
2293 int active = ((W)w)->active;
2294 prepares [active - 1] = prepares [--preparecnt];
2295 ((W)prepares [active - 1])->active = active;
2296 }
2297
2298 ev_stop (EV_A_ (W)w);
2299 }
2300
2301 void
2302 ev_check_start (EV_P_ ev_check *w)
2303 {
2304 if (expect_false (ev_is_active (w)))
2305 return;
2306
2307 ev_start (EV_A_ (W)w, ++checkcnt);
2308 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2309 checks [checkcnt - 1] = w;
2310 }
2311
2312 void
2313 ev_check_stop (EV_P_ ev_check *w)
2314 {
2315 clear_pending (EV_A_ (W)w);
2316 if (expect_false (!ev_is_active (w)))
2317 return;
2318
2319 {
2320 int active = ((W)w)->active;
2321 checks [active - 1] = checks [--checkcnt];
2322 ((W)checks [active - 1])->active = active;
2323 }
2324
2325 ev_stop (EV_A_ (W)w);
2326 }
2327
2328 #if EV_EMBED_ENABLE
2329 void noinline
2330 ev_embed_sweep (EV_P_ ev_embed *w)
2331 {
2332 ev_loop (w->other, EVLOOP_NONBLOCK);
2333 }
2334
2335 static void
2336 embed_io_cb (EV_P_ ev_io *io, int revents)
2337 {
2338 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2339
2340 if (ev_cb (w))
2341 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2342 else
2343 ev_loop (w->other, EVLOOP_NONBLOCK);
2344 }
2345
2346 static void
2347 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2348 {
2349 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2350
2351 {
2352 struct ev_loop *loop = w->other;
2353
2354 while (fdchangecnt)
2355 {
2356 fd_reify (EV_A);
2357 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2358 }
2359 }
2360 }
2361
2362 #if 0
2363 static void
2364 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2365 {
2366 ev_idle_stop (EV_A_ idle);
2367 }
2368 #endif
2369
2370 void
2371 ev_embed_start (EV_P_ ev_embed *w)
2372 {
2373 if (expect_false (ev_is_active (w)))
2374 return;
2375
2376 {
2377 struct ev_loop *loop = w->other;
2378 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2379 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2380 }
2381
2382 ev_set_priority (&w->io, ev_priority (w));
2383 ev_io_start (EV_A_ &w->io);
2384
2385 ev_prepare_init (&w->prepare, embed_prepare_cb);
2386 ev_set_priority (&w->prepare, EV_MINPRI);
2387 ev_prepare_start (EV_A_ &w->prepare);
2388
2389 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2390
2391 ev_start (EV_A_ (W)w, 1);
2392 }
2393
2394 void
2395 ev_embed_stop (EV_P_ ev_embed *w)
2396 {
2397 clear_pending (EV_A_ (W)w);
2398 if (expect_false (!ev_is_active (w)))
2399 return;
2400
2401 ev_io_stop (EV_A_ &w->io);
2402 ev_prepare_stop (EV_A_ &w->prepare);
2403
2404 ev_stop (EV_A_ (W)w);
2405 }
2406 #endif
2407
2408 #if EV_FORK_ENABLE
2409 void
2410 ev_fork_start (EV_P_ ev_fork *w)
2411 {
2412 if (expect_false (ev_is_active (w)))
2413 return;
2414
2415 ev_start (EV_A_ (W)w, ++forkcnt);
2416 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2417 forks [forkcnt - 1] = w;
2418 }
2419
2420 void
2421 ev_fork_stop (EV_P_ ev_fork *w)
2422 {
2423 clear_pending (EV_A_ (W)w);
2424 if (expect_false (!ev_is_active (w)))
2425 return;
2426
2427 {
2428 int active = ((W)w)->active;
2429 forks [active - 1] = forks [--forkcnt];
2430 ((W)forks [active - 1])->active = active;
2431 }
2432
2433 ev_stop (EV_A_ (W)w);
2434 }
2435 #endif
2436
2437 #if EV_ASYNC_ENABLE
2438 void
2439 ev_async_start (EV_P_ ev_async *w)
2440 {
2441 if (expect_false (ev_is_active (w)))
2442 return;
2443
2444 evpipe_init (EV_A);
2445
2446 ev_start (EV_A_ (W)w, ++asynccnt);
2447 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2448 asyncs [asynccnt - 1] = w;
2449 }
2450
2451 void
2452 ev_async_stop (EV_P_ ev_async *w)
2453 {
2454 clear_pending (EV_A_ (W)w);
2455 if (expect_false (!ev_is_active (w)))
2456 return;
2457
2458 {
2459 int active = ((W)w)->active;
2460 asyncs [active - 1] = asyncs [--asynccnt];
2461 ((W)asyncs [active - 1])->active = active;
2462 }
2463
2464 ev_stop (EV_A_ (W)w);
2465 }
2466
2467 void
2468 ev_async_send (EV_P_ ev_async *w)
2469 {
2470 w->sent = 1;
2471 evpipe_write (EV_A_ &gotasync);
2472 }
2473 #endif
2474
2475 /*****************************************************************************/
2476
2477 struct ev_once
2478 {
2479 ev_io io;
2480 ev_timer to;
2481 void (*cb)(int revents, void *arg);
2482 void *arg;
2483 };
2484
2485 static void
2486 once_cb (EV_P_ struct ev_once *once, int revents)
2487 {
2488 void (*cb)(int revents, void *arg) = once->cb;
2489 void *arg = once->arg;
2490
2491 ev_io_stop (EV_A_ &once->io);
2492 ev_timer_stop (EV_A_ &once->to);
2493 ev_free (once);
2494
2495 cb (revents, arg);
2496 }
2497
2498 static void
2499 once_cb_io (EV_P_ ev_io *w, int revents)
2500 {
2501 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
2502 }
2503
2504 static void
2505 once_cb_to (EV_P_ ev_timer *w, int revents)
2506 {
2507 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
2508 }
2509
2510 void
2511 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2512 {
2513 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2514
2515 if (expect_false (!once))
2516 {
2517 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2518 return;
2519 }
2520
2521 once->cb = cb;
2522 once->arg = arg;
2523
2524 ev_init (&once->io, once_cb_io);
2525 if (fd >= 0)
2526 {
2527 ev_io_set (&once->io, fd, events);
2528 ev_io_start (EV_A_ &once->io);
2529 }
2530
2531 ev_init (&once->to, once_cb_to);
2532 if (timeout >= 0.)
2533 {
2534 ev_timer_set (&once->to, timeout, 0.);
2535 ev_timer_start (EV_A_ &once->to);
2536 }
2537 }
2538
2539 #if EV_MULTIPLICITY
2540 #include "ev_wrap.h"
2541 #endif
2542
2543 #ifdef __cplusplus
2544 }
2545 #endif
2546