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Revision: 1.209
Committed: Tue Feb 5 23:56:33 2008 UTC (16 years, 5 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.208: +15 -10 lines
Log Message:
compile without it, too, fix memleak

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