ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
Revision: 1.232
Committed: Tue May 6 15:29:58 2008 UTC (16 years, 2 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.231: +6 -4 lines
Log Message:
*** empty log message ***

File Contents

# Content
1 /*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
38 */
39
40 #ifdef __cplusplus
41 extern "C" {
42 #endif
43
44 /* this big block deduces configuration from config.h */
45 #ifndef EV_STANDALONE
46 # ifdef EV_CONFIG_H
47 # include EV_CONFIG_H
48 # else
49 # include "config.h"
50 # endif
51
52 # if HAVE_CLOCK_GETTIME
53 # ifndef EV_USE_MONOTONIC
54 # define EV_USE_MONOTONIC 1
55 # endif
56 # ifndef EV_USE_REALTIME
57 # define EV_USE_REALTIME 1
58 # endif
59 # else
60 # ifndef EV_USE_MONOTONIC
61 # define EV_USE_MONOTONIC 0
62 # endif
63 # ifndef EV_USE_REALTIME
64 # define EV_USE_REALTIME 0
65 # endif
66 # endif
67
68 # ifndef EV_USE_NANOSLEEP
69 # if HAVE_NANOSLEEP
70 # define EV_USE_NANOSLEEP 1
71 # else
72 # define EV_USE_NANOSLEEP 0
73 # endif
74 # endif
75
76 # ifndef EV_USE_SELECT
77 # if HAVE_SELECT && HAVE_SYS_SELECT_H
78 # define EV_USE_SELECT 1
79 # else
80 # define EV_USE_SELECT 0
81 # endif
82 # endif
83
84 # ifndef EV_USE_POLL
85 # if HAVE_POLL && HAVE_POLL_H
86 # define EV_USE_POLL 1
87 # else
88 # define EV_USE_POLL 0
89 # endif
90 # endif
91
92 # ifndef EV_USE_EPOLL
93 # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94 # define EV_USE_EPOLL 1
95 # else
96 # define EV_USE_EPOLL 0
97 # endif
98 # endif
99
100 # ifndef EV_USE_KQUEUE
101 # if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102 # define EV_USE_KQUEUE 1
103 # else
104 # define EV_USE_KQUEUE 0
105 # endif
106 # endif
107
108 # ifndef EV_USE_PORT
109 # if HAVE_PORT_H && HAVE_PORT_CREATE
110 # define EV_USE_PORT 1
111 # else
112 # define EV_USE_PORT 0
113 # endif
114 # endif
115
116 # ifndef EV_USE_INOTIFY
117 # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118 # define EV_USE_INOTIFY 1
119 # else
120 # define EV_USE_INOTIFY 0
121 # endif
122 # endif
123
124 # ifndef EV_USE_EVENTFD
125 # if HAVE_EVENTFD
126 # define EV_USE_EVENTFD 1
127 # else
128 # define EV_USE_EVENTFD 0
129 # endif
130 # endif
131
132 #endif
133
134 #include <math.h>
135 #include <stdlib.h>
136 #include <fcntl.h>
137 #include <stddef.h>
138
139 #include <stdio.h>
140
141 #include <assert.h>
142 #include <errno.h>
143 #include <sys/types.h>
144 #include <time.h>
145
146 #include <signal.h>
147
148 #ifdef EV_H
149 # include EV_H
150 #else
151 # include "ev.h"
152 #endif
153
154 #ifndef _WIN32
155 # include <sys/time.h>
156 # include <sys/wait.h>
157 # include <unistd.h>
158 #else
159 # define WIN32_LEAN_AND_MEAN
160 # include <windows.h>
161 # ifndef EV_SELECT_IS_WINSOCKET
162 # define EV_SELECT_IS_WINSOCKET 1
163 # endif
164 #endif
165
166 /* this block tries to deduce configuration from header-defined symbols and defaults */
167
168 #ifndef EV_USE_MONOTONIC
169 # define EV_USE_MONOTONIC 0
170 #endif
171
172 #ifndef EV_USE_REALTIME
173 # define EV_USE_REALTIME 0
174 #endif
175
176 #ifndef EV_USE_NANOSLEEP
177 # define EV_USE_NANOSLEEP 0
178 #endif
179
180 #ifndef EV_USE_SELECT
181 # define EV_USE_SELECT 1
182 #endif
183
184 #ifndef EV_USE_POLL
185 # ifdef _WIN32
186 # define EV_USE_POLL 0
187 # else
188 # define EV_USE_POLL 1
189 # endif
190 #endif
191
192 #ifndef EV_USE_EPOLL
193 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194 # define EV_USE_EPOLL 1
195 # else
196 # define EV_USE_EPOLL 0
197 # endif
198 #endif
199
200 #ifndef EV_USE_KQUEUE
201 # define EV_USE_KQUEUE 0
202 #endif
203
204 #ifndef EV_USE_PORT
205 # define EV_USE_PORT 0
206 #endif
207
208 #ifndef EV_USE_INOTIFY
209 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210 # define EV_USE_INOTIFY 1
211 # else
212 # define EV_USE_INOTIFY 0
213 # endif
214 #endif
215
216 #ifndef EV_PID_HASHSIZE
217 # if EV_MINIMAL
218 # define EV_PID_HASHSIZE 1
219 # else
220 # define EV_PID_HASHSIZE 16
221 # endif
222 #endif
223
224 #ifndef EV_INOTIFY_HASHSIZE
225 # if EV_MINIMAL
226 # define EV_INOTIFY_HASHSIZE 1
227 # else
228 # define EV_INOTIFY_HASHSIZE 16
229 # endif
230 #endif
231
232 #ifndef EV_USE_EVENTFD
233 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234 # define EV_USE_EVENTFD 1
235 # else
236 # define EV_USE_EVENTFD 0
237 # endif
238 #endif
239
240 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
241
242 #ifndef CLOCK_MONOTONIC
243 # undef EV_USE_MONOTONIC
244 # define EV_USE_MONOTONIC 0
245 #endif
246
247 #ifndef CLOCK_REALTIME
248 # undef EV_USE_REALTIME
249 # define EV_USE_REALTIME 0
250 #endif
251
252 #if !EV_STAT_ENABLE
253 # undef EV_USE_INOTIFY
254 # define EV_USE_INOTIFY 0
255 #endif
256
257 #if !EV_USE_NANOSLEEP
258 # ifndef _WIN32
259 # include <sys/select.h>
260 # endif
261 #endif
262
263 #if EV_USE_INOTIFY
264 # include <sys/inotify.h>
265 #endif
266
267 #if EV_SELECT_IS_WINSOCKET
268 # include <winsock.h>
269 #endif
270
271 #if EV_USE_EVENTFD
272 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273 # include <stdint.h>
274 # ifdef __cplusplus
275 extern "C" {
276 # endif
277 int eventfd (unsigned int initval, int flags);
278 # ifdef __cplusplus
279 }
280 # endif
281 #endif
282
283 /**/
284
285 /*
286 * This is used to avoid floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */
293 #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
294
295 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
296 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
297 /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
298
299 #if __GNUC__ >= 4
300 # define expect(expr,value) __builtin_expect ((expr),(value))
301 # define noinline __attribute__ ((noinline))
302 #else
303 # define expect(expr,value) (expr)
304 # define noinline
305 # if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306 # define inline
307 # endif
308 #endif
309
310 #define expect_false(expr) expect ((expr) != 0, 0)
311 #define expect_true(expr) expect ((expr) != 0, 1)
312 #define inline_size static inline
313
314 #if EV_MINIMAL
315 # define inline_speed static noinline
316 #else
317 # define inline_speed static inline
318 #endif
319
320 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
321 #define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
322
323 #define EMPTY /* required for microsofts broken pseudo-c compiler */
324 #define EMPTY2(a,b) /* used to suppress some warnings */
325
326 typedef ev_watcher *W;
327 typedef ev_watcher_list *WL;
328 typedef ev_watcher_time *WT;
329
330 #define ev_active(w) ((W)(w))->active
331 #define ev_at(w) ((WT)(w))->at
332
333 #if EV_USE_MONOTONIC
334 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
335 /* giving it a reasonably high chance of working on typical architetcures */
336 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
337 #endif
338
339 #ifdef _WIN32
340 # include "ev_win32.c"
341 #endif
342
343 /*****************************************************************************/
344
345 static void (*syserr_cb)(const char *msg);
346
347 void
348 ev_set_syserr_cb (void (*cb)(const char *msg))
349 {
350 syserr_cb = cb;
351 }
352
353 static void noinline
354 syserr (const char *msg)
355 {
356 if (!msg)
357 msg = "(libev) system error";
358
359 if (syserr_cb)
360 syserr_cb (msg);
361 else
362 {
363 perror (msg);
364 abort ();
365 }
366 }
367
368 static void *
369 ev_realloc_emul (void *ptr, long size)
370 {
371 /* some systems, notably openbsd and darwin, fail to properly
372 * implement realloc (x, 0) (as required by both ansi c-98 and
373 * the single unix specification, so work around them here.
374 */
375
376 if (size)
377 return realloc (ptr, size);
378
379 free (ptr);
380 return 0;
381 }
382
383 static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
384
385 void
386 ev_set_allocator (void *(*cb)(void *ptr, long size))
387 {
388 alloc = cb;
389 }
390
391 inline_speed void *
392 ev_realloc (void *ptr, long size)
393 {
394 ptr = alloc (ptr, size);
395
396 if (!ptr && size)
397 {
398 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
399 abort ();
400 }
401
402 return ptr;
403 }
404
405 #define ev_malloc(size) ev_realloc (0, (size))
406 #define ev_free(ptr) ev_realloc ((ptr), 0)
407
408 /*****************************************************************************/
409
410 typedef struct
411 {
412 WL head;
413 unsigned char events;
414 unsigned char reify;
415 #if EV_SELECT_IS_WINSOCKET
416 SOCKET handle;
417 #endif
418 } ANFD;
419
420 typedef struct
421 {
422 W w;
423 int events;
424 } ANPENDING;
425
426 #if EV_USE_INOTIFY
427 typedef struct
428 {
429 WL head;
430 } ANFS;
431 #endif
432
433 #if EV_MULTIPLICITY
434
435 struct ev_loop
436 {
437 ev_tstamp ev_rt_now;
438 #define ev_rt_now ((loop)->ev_rt_now)
439 #define VAR(name,decl) decl;
440 #include "ev_vars.h"
441 #undef VAR
442 };
443 #include "ev_wrap.h"
444
445 static struct ev_loop default_loop_struct;
446 struct ev_loop *ev_default_loop_ptr;
447
448 #else
449
450 ev_tstamp ev_rt_now;
451 #define VAR(name,decl) static decl;
452 #include "ev_vars.h"
453 #undef VAR
454
455 static int ev_default_loop_ptr;
456
457 #endif
458
459 /*****************************************************************************/
460
461 ev_tstamp
462 ev_time (void)
463 {
464 #if EV_USE_REALTIME
465 struct timespec ts;
466 clock_gettime (CLOCK_REALTIME, &ts);
467 return ts.tv_sec + ts.tv_nsec * 1e-9;
468 #else
469 struct timeval tv;
470 gettimeofday (&tv, 0);
471 return tv.tv_sec + tv.tv_usec * 1e-6;
472 #endif
473 }
474
475 ev_tstamp inline_size
476 get_clock (void)
477 {
478 #if EV_USE_MONOTONIC
479 if (expect_true (have_monotonic))
480 {
481 struct timespec ts;
482 clock_gettime (CLOCK_MONOTONIC, &ts);
483 return ts.tv_sec + ts.tv_nsec * 1e-9;
484 }
485 #endif
486
487 return ev_time ();
488 }
489
490 #if EV_MULTIPLICITY
491 ev_tstamp
492 ev_now (EV_P)
493 {
494 return ev_rt_now;
495 }
496 #endif
497
498 void
499 ev_sleep (ev_tstamp delay)
500 {
501 if (delay > 0.)
502 {
503 #if EV_USE_NANOSLEEP
504 struct timespec ts;
505
506 ts.tv_sec = (time_t)delay;
507 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
508
509 nanosleep (&ts, 0);
510 #elif defined(_WIN32)
511 Sleep ((unsigned long)(delay * 1e3));
512 #else
513 struct timeval tv;
514
515 tv.tv_sec = (time_t)delay;
516 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
517
518 select (0, 0, 0, 0, &tv);
519 #endif
520 }
521 }
522
523 /*****************************************************************************/
524
525 #define MALLOC_ROUND 4096 // prefer to allocate in chunks of this size, must be 2**n and >> 4 longs
526
527 int inline_size
528 array_nextsize (int elem, int cur, int cnt)
529 {
530 int ncur = cur + 1;
531
532 do
533 ncur <<= 1;
534 while (cnt > ncur);
535
536 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
537 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
538 {
539 ncur *= elem;
540 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
541 ncur = ncur - sizeof (void *) * 4;
542 ncur /= elem;
543 }
544
545 return ncur;
546 }
547
548 static noinline void *
549 array_realloc (int elem, void *base, int *cur, int cnt)
550 {
551 *cur = array_nextsize (elem, *cur, cnt);
552 return ev_realloc (base, elem * *cur);
553 }
554
555 #define array_needsize(type,base,cur,cnt,init) \
556 if (expect_false ((cnt) > (cur))) \
557 { \
558 int ocur_ = (cur); \
559 (base) = (type *)array_realloc \
560 (sizeof (type), (base), &(cur), (cnt)); \
561 init ((base) + (ocur_), (cur) - ocur_); \
562 }
563
564 #if 0
565 #define array_slim(type,stem) \
566 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
567 { \
568 stem ## max = array_roundsize (stem ## cnt >> 1); \
569 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
570 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
571 }
572 #endif
573
574 #define array_free(stem, idx) \
575 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
576
577 /*****************************************************************************/
578
579 void noinline
580 ev_feed_event (EV_P_ void *w, int revents)
581 {
582 W w_ = (W)w;
583 int pri = ABSPRI (w_);
584
585 if (expect_false (w_->pending))
586 pendings [pri][w_->pending - 1].events |= revents;
587 else
588 {
589 w_->pending = ++pendingcnt [pri];
590 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
591 pendings [pri][w_->pending - 1].w = w_;
592 pendings [pri][w_->pending - 1].events = revents;
593 }
594 }
595
596 void inline_speed
597 queue_events (EV_P_ W *events, int eventcnt, int type)
598 {
599 int i;
600
601 for (i = 0; i < eventcnt; ++i)
602 ev_feed_event (EV_A_ events [i], type);
603 }
604
605 /*****************************************************************************/
606
607 void inline_size
608 anfds_init (ANFD *base, int count)
609 {
610 while (count--)
611 {
612 base->head = 0;
613 base->events = EV_NONE;
614 base->reify = 0;
615
616 ++base;
617 }
618 }
619
620 void inline_speed
621 fd_event (EV_P_ int fd, int revents)
622 {
623 ANFD *anfd = anfds + fd;
624 ev_io *w;
625
626 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
627 {
628 int ev = w->events & revents;
629
630 if (ev)
631 ev_feed_event (EV_A_ (W)w, ev);
632 }
633 }
634
635 void
636 ev_feed_fd_event (EV_P_ int fd, int revents)
637 {
638 if (fd >= 0 && fd < anfdmax)
639 fd_event (EV_A_ fd, revents);
640 }
641
642 void inline_size
643 fd_reify (EV_P)
644 {
645 int i;
646
647 for (i = 0; i < fdchangecnt; ++i)
648 {
649 int fd = fdchanges [i];
650 ANFD *anfd = anfds + fd;
651 ev_io *w;
652
653 unsigned char events = 0;
654
655 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
656 events |= (unsigned char)w->events;
657
658 #if EV_SELECT_IS_WINSOCKET
659 if (events)
660 {
661 unsigned long argp;
662 #ifdef EV_FD_TO_WIN32_HANDLE
663 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
664 #else
665 anfd->handle = _get_osfhandle (fd);
666 #endif
667 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
668 }
669 #endif
670
671 {
672 unsigned char o_events = anfd->events;
673 unsigned char o_reify = anfd->reify;
674
675 anfd->reify = 0;
676 anfd->events = events;
677
678 if (o_events != events || o_reify & EV_IOFDSET)
679 backend_modify (EV_A_ fd, o_events, events);
680 }
681 }
682
683 fdchangecnt = 0;
684 }
685
686 void inline_size
687 fd_change (EV_P_ int fd, int flags)
688 {
689 unsigned char reify = anfds [fd].reify;
690 anfds [fd].reify |= flags;
691
692 if (expect_true (!reify))
693 {
694 ++fdchangecnt;
695 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
696 fdchanges [fdchangecnt - 1] = fd;
697 }
698 }
699
700 void inline_speed
701 fd_kill (EV_P_ int fd)
702 {
703 ev_io *w;
704
705 while ((w = (ev_io *)anfds [fd].head))
706 {
707 ev_io_stop (EV_A_ w);
708 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
709 }
710 }
711
712 int inline_size
713 fd_valid (int fd)
714 {
715 #ifdef _WIN32
716 return _get_osfhandle (fd) != -1;
717 #else
718 return fcntl (fd, F_GETFD) != -1;
719 #endif
720 }
721
722 /* called on EBADF to verify fds */
723 static void noinline
724 fd_ebadf (EV_P)
725 {
726 int fd;
727
728 for (fd = 0; fd < anfdmax; ++fd)
729 if (anfds [fd].events)
730 if (!fd_valid (fd) == -1 && errno == EBADF)
731 fd_kill (EV_A_ fd);
732 }
733
734 /* called on ENOMEM in select/poll to kill some fds and retry */
735 static void noinline
736 fd_enomem (EV_P)
737 {
738 int fd;
739
740 for (fd = anfdmax; fd--; )
741 if (anfds [fd].events)
742 {
743 fd_kill (EV_A_ fd);
744 return;
745 }
746 }
747
748 /* usually called after fork if backend needs to re-arm all fds from scratch */
749 static void noinline
750 fd_rearm_all (EV_P)
751 {
752 int fd;
753
754 for (fd = 0; fd < anfdmax; ++fd)
755 if (anfds [fd].events)
756 {
757 anfds [fd].events = 0;
758 fd_change (EV_A_ fd, EV_IOFDSET | 1);
759 }
760 }
761
762 /*****************************************************************************/
763
764 /* towards the root */
765 void inline_speed
766 upheap (WT *heap, int k)
767 {
768 WT w = heap [k];
769
770 for (;;)
771 {
772 int p = k >> 1;
773
774 /* maybe we could use a dummy element at heap [0]? */
775 if (!p || heap [p]->at <= w->at)
776 break;
777
778 heap [k] = heap [p];
779 ev_active (heap [k]) = k;
780 k = p;
781 }
782
783 heap [k] = w;
784 ev_active (heap [k]) = k;
785 }
786
787 /* away from the root */
788 void inline_speed
789 downheap (WT *heap, int N, int k)
790 {
791 WT w = heap [k];
792
793 for (;;)
794 {
795 int c = k << 1;
796
797 if (c > N)
798 break;
799
800 c += c < N && heap [c]->at > heap [c + 1]->at
801 ? 1 : 0;
802
803 if (w->at <= heap [c]->at)
804 break;
805
806 heap [k] = heap [c];
807 ev_active (heap [k]) = k;
808
809 k = c;
810 }
811
812 heap [k] = w;
813 ev_active (heap [k]) = k;
814 }
815
816 void inline_size
817 adjustheap (WT *heap, int N, int k)
818 {
819 upheap (heap, k);
820 downheap (heap, N, k);
821 }
822
823 /*****************************************************************************/
824
825 typedef struct
826 {
827 WL head;
828 EV_ATOMIC_T gotsig;
829 } ANSIG;
830
831 static ANSIG *signals;
832 static int signalmax;
833
834 static EV_ATOMIC_T gotsig;
835
836 void inline_size
837 signals_init (ANSIG *base, int count)
838 {
839 while (count--)
840 {
841 base->head = 0;
842 base->gotsig = 0;
843
844 ++base;
845 }
846 }
847
848 /*****************************************************************************/
849
850 void inline_speed
851 fd_intern (int fd)
852 {
853 #ifdef _WIN32
854 int arg = 1;
855 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
856 #else
857 fcntl (fd, F_SETFD, FD_CLOEXEC);
858 fcntl (fd, F_SETFL, O_NONBLOCK);
859 #endif
860 }
861
862 static void noinline
863 evpipe_init (EV_P)
864 {
865 if (!ev_is_active (&pipeev))
866 {
867 #if EV_USE_EVENTFD
868 if ((evfd = eventfd (0, 0)) >= 0)
869 {
870 evpipe [0] = -1;
871 fd_intern (evfd);
872 ev_io_set (&pipeev, evfd, EV_READ);
873 }
874 else
875 #endif
876 {
877 while (pipe (evpipe))
878 syserr ("(libev) error creating signal/async pipe");
879
880 fd_intern (evpipe [0]);
881 fd_intern (evpipe [1]);
882 ev_io_set (&pipeev, evpipe [0], EV_READ);
883 }
884
885 ev_io_start (EV_A_ &pipeev);
886 ev_unref (EV_A); /* watcher should not keep loop alive */
887 }
888 }
889
890 void inline_size
891 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
892 {
893 if (!*flag)
894 {
895 int old_errno = errno; /* save errno because write might clobber it */
896
897 *flag = 1;
898
899 #if EV_USE_EVENTFD
900 if (evfd >= 0)
901 {
902 uint64_t counter = 1;
903 write (evfd, &counter, sizeof (uint64_t));
904 }
905 else
906 #endif
907 write (evpipe [1], &old_errno, 1);
908
909 errno = old_errno;
910 }
911 }
912
913 static void
914 pipecb (EV_P_ ev_io *iow, int revents)
915 {
916 #if EV_USE_EVENTFD
917 if (evfd >= 0)
918 {
919 uint64_t counter;
920 read (evfd, &counter, sizeof (uint64_t));
921 }
922 else
923 #endif
924 {
925 char dummy;
926 read (evpipe [0], &dummy, 1);
927 }
928
929 if (gotsig && ev_is_default_loop (EV_A))
930 {
931 int signum;
932 gotsig = 0;
933
934 for (signum = signalmax; signum--; )
935 if (signals [signum].gotsig)
936 ev_feed_signal_event (EV_A_ signum + 1);
937 }
938
939 #if EV_ASYNC_ENABLE
940 if (gotasync)
941 {
942 int i;
943 gotasync = 0;
944
945 for (i = asynccnt; i--; )
946 if (asyncs [i]->sent)
947 {
948 asyncs [i]->sent = 0;
949 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
950 }
951 }
952 #endif
953 }
954
955 /*****************************************************************************/
956
957 static void
958 ev_sighandler (int signum)
959 {
960 #if EV_MULTIPLICITY
961 struct ev_loop *loop = &default_loop_struct;
962 #endif
963
964 #if _WIN32
965 signal (signum, ev_sighandler);
966 #endif
967
968 signals [signum - 1].gotsig = 1;
969 evpipe_write (EV_A_ &gotsig);
970 }
971
972 void noinline
973 ev_feed_signal_event (EV_P_ int signum)
974 {
975 WL w;
976
977 #if EV_MULTIPLICITY
978 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
979 #endif
980
981 --signum;
982
983 if (signum < 0 || signum >= signalmax)
984 return;
985
986 signals [signum].gotsig = 0;
987
988 for (w = signals [signum].head; w; w = w->next)
989 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
990 }
991
992 /*****************************************************************************/
993
994 static WL childs [EV_PID_HASHSIZE];
995
996 #ifndef _WIN32
997
998 static ev_signal childev;
999
1000 #ifndef WIFCONTINUED
1001 # define WIFCONTINUED(status) 0
1002 #endif
1003
1004 void inline_speed
1005 child_reap (EV_P_ int chain, int pid, int status)
1006 {
1007 ev_child *w;
1008 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1009
1010 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1011 {
1012 if ((w->pid == pid || !w->pid)
1013 && (!traced || (w->flags & 1)))
1014 {
1015 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1016 w->rpid = pid;
1017 w->rstatus = status;
1018 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1019 }
1020 }
1021 }
1022
1023 #ifndef WCONTINUED
1024 # define WCONTINUED 0
1025 #endif
1026
1027 static void
1028 childcb (EV_P_ ev_signal *sw, int revents)
1029 {
1030 int pid, status;
1031
1032 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1033 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1034 if (!WCONTINUED
1035 || errno != EINVAL
1036 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1037 return;
1038
1039 /* make sure we are called again until all children have been reaped */
1040 /* we need to do it this way so that the callback gets called before we continue */
1041 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1042
1043 child_reap (EV_A_ pid, pid, status);
1044 if (EV_PID_HASHSIZE > 1)
1045 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1046 }
1047
1048 #endif
1049
1050 /*****************************************************************************/
1051
1052 #if EV_USE_PORT
1053 # include "ev_port.c"
1054 #endif
1055 #if EV_USE_KQUEUE
1056 # include "ev_kqueue.c"
1057 #endif
1058 #if EV_USE_EPOLL
1059 # include "ev_epoll.c"
1060 #endif
1061 #if EV_USE_POLL
1062 # include "ev_poll.c"
1063 #endif
1064 #if EV_USE_SELECT
1065 # include "ev_select.c"
1066 #endif
1067
1068 int
1069 ev_version_major (void)
1070 {
1071 return EV_VERSION_MAJOR;
1072 }
1073
1074 int
1075 ev_version_minor (void)
1076 {
1077 return EV_VERSION_MINOR;
1078 }
1079
1080 /* return true if we are running with elevated privileges and should ignore env variables */
1081 int inline_size
1082 enable_secure (void)
1083 {
1084 #ifdef _WIN32
1085 return 0;
1086 #else
1087 return getuid () != geteuid ()
1088 || getgid () != getegid ();
1089 #endif
1090 }
1091
1092 unsigned int
1093 ev_supported_backends (void)
1094 {
1095 unsigned int flags = 0;
1096
1097 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1098 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1099 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1100 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1101 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1102
1103 return flags;
1104 }
1105
1106 unsigned int
1107 ev_recommended_backends (void)
1108 {
1109 unsigned int flags = ev_supported_backends ();
1110
1111 #ifndef __NetBSD__
1112 /* kqueue is borked on everything but netbsd apparently */
1113 /* it usually doesn't work correctly on anything but sockets and pipes */
1114 flags &= ~EVBACKEND_KQUEUE;
1115 #endif
1116 #ifdef __APPLE__
1117 // flags &= ~EVBACKEND_KQUEUE; for documentation
1118 flags &= ~EVBACKEND_POLL;
1119 #endif
1120
1121 return flags;
1122 }
1123
1124 unsigned int
1125 ev_embeddable_backends (void)
1126 {
1127 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1128
1129 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1130 /* please fix it and tell me how to detect the fix */
1131 flags &= ~EVBACKEND_EPOLL;
1132
1133 return flags;
1134 }
1135
1136 unsigned int
1137 ev_backend (EV_P)
1138 {
1139 return backend;
1140 }
1141
1142 unsigned int
1143 ev_loop_count (EV_P)
1144 {
1145 return loop_count;
1146 }
1147
1148 void
1149 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1150 {
1151 io_blocktime = interval;
1152 }
1153
1154 void
1155 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1156 {
1157 timeout_blocktime = interval;
1158 }
1159
1160 static void noinline
1161 loop_init (EV_P_ unsigned int flags)
1162 {
1163 if (!backend)
1164 {
1165 #if EV_USE_MONOTONIC
1166 {
1167 struct timespec ts;
1168 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1169 have_monotonic = 1;
1170 }
1171 #endif
1172
1173 ev_rt_now = ev_time ();
1174 mn_now = get_clock ();
1175 now_floor = mn_now;
1176 rtmn_diff = ev_rt_now - mn_now;
1177
1178 io_blocktime = 0.;
1179 timeout_blocktime = 0.;
1180 backend = 0;
1181 backend_fd = -1;
1182 gotasync = 0;
1183 #if EV_USE_INOTIFY
1184 fs_fd = -2;
1185 #endif
1186
1187 /* pid check not overridable via env */
1188 #ifndef _WIN32
1189 if (flags & EVFLAG_FORKCHECK)
1190 curpid = getpid ();
1191 #endif
1192
1193 if (!(flags & EVFLAG_NOENV)
1194 && !enable_secure ()
1195 && getenv ("LIBEV_FLAGS"))
1196 flags = atoi (getenv ("LIBEV_FLAGS"));
1197
1198 if (!(flags & 0x0000ffffU))
1199 flags |= ev_recommended_backends ();
1200
1201 #if EV_USE_PORT
1202 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1203 #endif
1204 #if EV_USE_KQUEUE
1205 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1206 #endif
1207 #if EV_USE_EPOLL
1208 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1209 #endif
1210 #if EV_USE_POLL
1211 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1212 #endif
1213 #if EV_USE_SELECT
1214 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1215 #endif
1216
1217 ev_init (&pipeev, pipecb);
1218 ev_set_priority (&pipeev, EV_MAXPRI);
1219 }
1220 }
1221
1222 static void noinline
1223 loop_destroy (EV_P)
1224 {
1225 int i;
1226
1227 if (ev_is_active (&pipeev))
1228 {
1229 ev_ref (EV_A); /* signal watcher */
1230 ev_io_stop (EV_A_ &pipeev);
1231
1232 #if EV_USE_EVENTFD
1233 if (evfd >= 0)
1234 close (evfd);
1235 #endif
1236
1237 if (evpipe [0] >= 0)
1238 {
1239 close (evpipe [0]);
1240 close (evpipe [1]);
1241 }
1242 }
1243
1244 #if EV_USE_INOTIFY
1245 if (fs_fd >= 0)
1246 close (fs_fd);
1247 #endif
1248
1249 if (backend_fd >= 0)
1250 close (backend_fd);
1251
1252 #if EV_USE_PORT
1253 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1254 #endif
1255 #if EV_USE_KQUEUE
1256 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1257 #endif
1258 #if EV_USE_EPOLL
1259 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1260 #endif
1261 #if EV_USE_POLL
1262 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1263 #endif
1264 #if EV_USE_SELECT
1265 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1266 #endif
1267
1268 for (i = NUMPRI; i--; )
1269 {
1270 array_free (pending, [i]);
1271 #if EV_IDLE_ENABLE
1272 array_free (idle, [i]);
1273 #endif
1274 }
1275
1276 ev_free (anfds); anfdmax = 0;
1277
1278 /* have to use the microsoft-never-gets-it-right macro */
1279 array_free (fdchange, EMPTY);
1280 array_free (timer, EMPTY);
1281 #if EV_PERIODIC_ENABLE
1282 array_free (periodic, EMPTY);
1283 #endif
1284 #if EV_FORK_ENABLE
1285 array_free (fork, EMPTY);
1286 #endif
1287 array_free (prepare, EMPTY);
1288 array_free (check, EMPTY);
1289 #if EV_ASYNC_ENABLE
1290 array_free (async, EMPTY);
1291 #endif
1292
1293 backend = 0;
1294 }
1295
1296 #if EV_USE_INOTIFY
1297 void inline_size infy_fork (EV_P);
1298 #endif
1299
1300 void inline_size
1301 loop_fork (EV_P)
1302 {
1303 #if EV_USE_PORT
1304 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1305 #endif
1306 #if EV_USE_KQUEUE
1307 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1308 #endif
1309 #if EV_USE_EPOLL
1310 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1311 #endif
1312 #if EV_USE_INOTIFY
1313 infy_fork (EV_A);
1314 #endif
1315
1316 if (ev_is_active (&pipeev))
1317 {
1318 /* this "locks" the handlers against writing to the pipe */
1319 /* while we modify the fd vars */
1320 gotsig = 1;
1321 #if EV_ASYNC_ENABLE
1322 gotasync = 1;
1323 #endif
1324
1325 ev_ref (EV_A);
1326 ev_io_stop (EV_A_ &pipeev);
1327
1328 #if EV_USE_EVENTFD
1329 if (evfd >= 0)
1330 close (evfd);
1331 #endif
1332
1333 if (evpipe [0] >= 0)
1334 {
1335 close (evpipe [0]);
1336 close (evpipe [1]);
1337 }
1338
1339 evpipe_init (EV_A);
1340 /* now iterate over everything, in case we missed something */
1341 pipecb (EV_A_ &pipeev, EV_READ);
1342 }
1343
1344 postfork = 0;
1345 }
1346
1347 #if EV_MULTIPLICITY
1348 struct ev_loop *
1349 ev_loop_new (unsigned int flags)
1350 {
1351 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1352
1353 memset (loop, 0, sizeof (struct ev_loop));
1354
1355 loop_init (EV_A_ flags);
1356
1357 if (ev_backend (EV_A))
1358 return loop;
1359
1360 return 0;
1361 }
1362
1363 void
1364 ev_loop_destroy (EV_P)
1365 {
1366 loop_destroy (EV_A);
1367 ev_free (loop);
1368 }
1369
1370 void
1371 ev_loop_fork (EV_P)
1372 {
1373 postfork = 1; /* must be in line with ev_default_fork */
1374 }
1375
1376 #endif
1377
1378 #if EV_MULTIPLICITY
1379 struct ev_loop *
1380 ev_default_loop_init (unsigned int flags)
1381 #else
1382 int
1383 ev_default_loop (unsigned int flags)
1384 #endif
1385 {
1386 if (!ev_default_loop_ptr)
1387 {
1388 #if EV_MULTIPLICITY
1389 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1390 #else
1391 ev_default_loop_ptr = 1;
1392 #endif
1393
1394 loop_init (EV_A_ flags);
1395
1396 if (ev_backend (EV_A))
1397 {
1398 #ifndef _WIN32
1399 ev_signal_init (&childev, childcb, SIGCHLD);
1400 ev_set_priority (&childev, EV_MAXPRI);
1401 ev_signal_start (EV_A_ &childev);
1402 ev_unref (EV_A); /* child watcher should not keep loop alive */
1403 #endif
1404 }
1405 else
1406 ev_default_loop_ptr = 0;
1407 }
1408
1409 return ev_default_loop_ptr;
1410 }
1411
1412 void
1413 ev_default_destroy (void)
1414 {
1415 #if EV_MULTIPLICITY
1416 struct ev_loop *loop = ev_default_loop_ptr;
1417 #endif
1418
1419 #ifndef _WIN32
1420 ev_ref (EV_A); /* child watcher */
1421 ev_signal_stop (EV_A_ &childev);
1422 #endif
1423
1424 loop_destroy (EV_A);
1425 }
1426
1427 void
1428 ev_default_fork (void)
1429 {
1430 #if EV_MULTIPLICITY
1431 struct ev_loop *loop = ev_default_loop_ptr;
1432 #endif
1433
1434 if (backend)
1435 postfork = 1; /* must be in line with ev_loop_fork */
1436 }
1437
1438 /*****************************************************************************/
1439
1440 void
1441 ev_invoke (EV_P_ void *w, int revents)
1442 {
1443 EV_CB_INVOKE ((W)w, revents);
1444 }
1445
1446 void inline_speed
1447 call_pending (EV_P)
1448 {
1449 int pri;
1450
1451 for (pri = NUMPRI; pri--; )
1452 while (pendingcnt [pri])
1453 {
1454 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1455
1456 if (expect_true (p->w))
1457 {
1458 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1459
1460 p->w->pending = 0;
1461 EV_CB_INVOKE (p->w, p->events);
1462 }
1463 }
1464 }
1465
1466 void inline_size
1467 timers_reify (EV_P)
1468 {
1469 while (timercnt && ev_at (timers [1]) <= mn_now)
1470 {
1471 ev_timer *w = (ev_timer *)timers [1];
1472
1473 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1474
1475 /* first reschedule or stop timer */
1476 if (w->repeat)
1477 {
1478 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1479
1480 ev_at (w) += w->repeat;
1481 if (ev_at (w) < mn_now)
1482 ev_at (w) = mn_now;
1483
1484 downheap (timers, timercnt, 1);
1485 }
1486 else
1487 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1488
1489 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1490 }
1491 }
1492
1493 #if EV_PERIODIC_ENABLE
1494 void inline_size
1495 periodics_reify (EV_P)
1496 {
1497 while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
1498 {
1499 ev_periodic *w = (ev_periodic *)periodics [1];
1500
1501 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1502
1503 /* first reschedule or stop timer */
1504 if (w->reschedule_cb)
1505 {
1506 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1507 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1508 downheap (periodics, periodiccnt, 1);
1509 }
1510 else if (w->interval)
1511 {
1512 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1513 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1514 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1515 downheap (periodics, periodiccnt, 1);
1516 }
1517 else
1518 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1519
1520 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1521 }
1522 }
1523
1524 static void noinline
1525 periodics_reschedule (EV_P)
1526 {
1527 int i;
1528
1529 /* adjust periodics after time jump */
1530 for (i = 1; i <= periodiccnt; ++i)
1531 {
1532 ev_periodic *w = (ev_periodic *)periodics [i];
1533
1534 if (w->reschedule_cb)
1535 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1536 else if (w->interval)
1537 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1538 }
1539
1540 /* now rebuild the heap */
1541 for (i = periodiccnt >> 1; i--; )
1542 downheap (periodics, periodiccnt, i);
1543 }
1544 #endif
1545
1546 #if EV_IDLE_ENABLE
1547 void inline_size
1548 idle_reify (EV_P)
1549 {
1550 if (expect_false (idleall))
1551 {
1552 int pri;
1553
1554 for (pri = NUMPRI; pri--; )
1555 {
1556 if (pendingcnt [pri])
1557 break;
1558
1559 if (idlecnt [pri])
1560 {
1561 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1562 break;
1563 }
1564 }
1565 }
1566 }
1567 #endif
1568
1569 void inline_speed
1570 time_update (EV_P_ ev_tstamp max_block)
1571 {
1572 int i;
1573
1574 #if EV_USE_MONOTONIC
1575 if (expect_true (have_monotonic))
1576 {
1577 ev_tstamp odiff = rtmn_diff;
1578
1579 mn_now = get_clock ();
1580
1581 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1582 /* interpolate in the meantime */
1583 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1584 {
1585 ev_rt_now = rtmn_diff + mn_now;
1586 return;
1587 }
1588
1589 now_floor = mn_now;
1590 ev_rt_now = ev_time ();
1591
1592 /* loop a few times, before making important decisions.
1593 * on the choice of "4": one iteration isn't enough,
1594 * in case we get preempted during the calls to
1595 * ev_time and get_clock. a second call is almost guaranteed
1596 * to succeed in that case, though. and looping a few more times
1597 * doesn't hurt either as we only do this on time-jumps or
1598 * in the unlikely event of having been preempted here.
1599 */
1600 for (i = 4; --i; )
1601 {
1602 rtmn_diff = ev_rt_now - mn_now;
1603
1604 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1605 return; /* all is well */
1606
1607 ev_rt_now = ev_time ();
1608 mn_now = get_clock ();
1609 now_floor = mn_now;
1610 }
1611
1612 # if EV_PERIODIC_ENABLE
1613 periodics_reschedule (EV_A);
1614 # endif
1615 /* no timer adjustment, as the monotonic clock doesn't jump */
1616 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1617 }
1618 else
1619 #endif
1620 {
1621 ev_rt_now = ev_time ();
1622
1623 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1624 {
1625 #if EV_PERIODIC_ENABLE
1626 periodics_reschedule (EV_A);
1627 #endif
1628 /* adjust timers. this is easy, as the offset is the same for all of them */
1629 for (i = 1; i <= timercnt; ++i)
1630 ev_at (timers [i]) += ev_rt_now - mn_now;
1631 }
1632
1633 mn_now = ev_rt_now;
1634 }
1635 }
1636
1637 void
1638 ev_ref (EV_P)
1639 {
1640 ++activecnt;
1641 }
1642
1643 void
1644 ev_unref (EV_P)
1645 {
1646 --activecnt;
1647 }
1648
1649 static int loop_done;
1650
1651 void
1652 ev_loop (EV_P_ int flags)
1653 {
1654 loop_done = EVUNLOOP_CANCEL;
1655
1656 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1657
1658 do
1659 {
1660 #ifndef _WIN32
1661 if (expect_false (curpid)) /* penalise the forking check even more */
1662 if (expect_false (getpid () != curpid))
1663 {
1664 curpid = getpid ();
1665 postfork = 1;
1666 }
1667 #endif
1668
1669 #if EV_FORK_ENABLE
1670 /* we might have forked, so queue fork handlers */
1671 if (expect_false (postfork))
1672 if (forkcnt)
1673 {
1674 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1675 call_pending (EV_A);
1676 }
1677 #endif
1678
1679 /* queue prepare watchers (and execute them) */
1680 if (expect_false (preparecnt))
1681 {
1682 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1683 call_pending (EV_A);
1684 }
1685
1686 if (expect_false (!activecnt))
1687 break;
1688
1689 /* we might have forked, so reify kernel state if necessary */
1690 if (expect_false (postfork))
1691 loop_fork (EV_A);
1692
1693 /* update fd-related kernel structures */
1694 fd_reify (EV_A);
1695
1696 /* calculate blocking time */
1697 {
1698 ev_tstamp waittime = 0.;
1699 ev_tstamp sleeptime = 0.;
1700
1701 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1702 {
1703 /* update time to cancel out callback processing overhead */
1704 time_update (EV_A_ 1e100);
1705
1706 waittime = MAX_BLOCKTIME;
1707
1708 if (timercnt)
1709 {
1710 ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
1711 if (waittime > to) waittime = to;
1712 }
1713
1714 #if EV_PERIODIC_ENABLE
1715 if (periodiccnt)
1716 {
1717 ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
1718 if (waittime > to) waittime = to;
1719 }
1720 #endif
1721
1722 if (expect_false (waittime < timeout_blocktime))
1723 waittime = timeout_blocktime;
1724
1725 sleeptime = waittime - backend_fudge;
1726
1727 if (expect_true (sleeptime > io_blocktime))
1728 sleeptime = io_blocktime;
1729
1730 if (sleeptime)
1731 {
1732 ev_sleep (sleeptime);
1733 waittime -= sleeptime;
1734 }
1735 }
1736
1737 ++loop_count;
1738 backend_poll (EV_A_ waittime);
1739
1740 /* update ev_rt_now, do magic */
1741 time_update (EV_A_ waittime + sleeptime);
1742 }
1743
1744 /* queue pending timers and reschedule them */
1745 timers_reify (EV_A); /* relative timers called last */
1746 #if EV_PERIODIC_ENABLE
1747 periodics_reify (EV_A); /* absolute timers called first */
1748 #endif
1749
1750 #if EV_IDLE_ENABLE
1751 /* queue idle watchers unless other events are pending */
1752 idle_reify (EV_A);
1753 #endif
1754
1755 /* queue check watchers, to be executed first */
1756 if (expect_false (checkcnt))
1757 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1758
1759 call_pending (EV_A);
1760 }
1761 while (expect_true (
1762 activecnt
1763 && !loop_done
1764 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1765 ));
1766
1767 if (loop_done == EVUNLOOP_ONE)
1768 loop_done = EVUNLOOP_CANCEL;
1769 }
1770
1771 void
1772 ev_unloop (EV_P_ int how)
1773 {
1774 loop_done = how;
1775 }
1776
1777 /*****************************************************************************/
1778
1779 void inline_size
1780 wlist_add (WL *head, WL elem)
1781 {
1782 elem->next = *head;
1783 *head = elem;
1784 }
1785
1786 void inline_size
1787 wlist_del (WL *head, WL elem)
1788 {
1789 while (*head)
1790 {
1791 if (*head == elem)
1792 {
1793 *head = elem->next;
1794 return;
1795 }
1796
1797 head = &(*head)->next;
1798 }
1799 }
1800
1801 void inline_speed
1802 clear_pending (EV_P_ W w)
1803 {
1804 if (w->pending)
1805 {
1806 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1807 w->pending = 0;
1808 }
1809 }
1810
1811 int
1812 ev_clear_pending (EV_P_ void *w)
1813 {
1814 W w_ = (W)w;
1815 int pending = w_->pending;
1816
1817 if (expect_true (pending))
1818 {
1819 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1820 w_->pending = 0;
1821 p->w = 0;
1822 return p->events;
1823 }
1824 else
1825 return 0;
1826 }
1827
1828 void inline_size
1829 pri_adjust (EV_P_ W w)
1830 {
1831 int pri = w->priority;
1832 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1833 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1834 w->priority = pri;
1835 }
1836
1837 void inline_speed
1838 ev_start (EV_P_ W w, int active)
1839 {
1840 pri_adjust (EV_A_ w);
1841 w->active = active;
1842 ev_ref (EV_A);
1843 }
1844
1845 void inline_size
1846 ev_stop (EV_P_ W w)
1847 {
1848 ev_unref (EV_A);
1849 w->active = 0;
1850 }
1851
1852 /*****************************************************************************/
1853
1854 void noinline
1855 ev_io_start (EV_P_ ev_io *w)
1856 {
1857 int fd = w->fd;
1858
1859 if (expect_false (ev_is_active (w)))
1860 return;
1861
1862 assert (("ev_io_start called with negative fd", fd >= 0));
1863
1864 ev_start (EV_A_ (W)w, 1);
1865 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1866 wlist_add (&anfds[fd].head, (WL)w);
1867
1868 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1869 w->events &= ~EV_IOFDSET;
1870 }
1871
1872 void noinline
1873 ev_io_stop (EV_P_ ev_io *w)
1874 {
1875 clear_pending (EV_A_ (W)w);
1876 if (expect_false (!ev_is_active (w)))
1877 return;
1878
1879 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1880
1881 wlist_del (&anfds[w->fd].head, (WL)w);
1882 ev_stop (EV_A_ (W)w);
1883
1884 fd_change (EV_A_ w->fd, 1);
1885 }
1886
1887 void noinline
1888 ev_timer_start (EV_P_ ev_timer *w)
1889 {
1890 if (expect_false (ev_is_active (w)))
1891 return;
1892
1893 ev_at (w) += mn_now;
1894
1895 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1896
1897 ev_start (EV_A_ (W)w, ++timercnt);
1898 array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
1899 timers [timercnt] = (WT)w;
1900 upheap (timers, timercnt);
1901
1902 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1903 }
1904
1905 void noinline
1906 ev_timer_stop (EV_P_ ev_timer *w)
1907 {
1908 clear_pending (EV_A_ (W)w);
1909 if (expect_false (!ev_is_active (w)))
1910 return;
1911
1912 {
1913 int active = ev_active (w);
1914
1915 assert (("internal timer heap corruption", timers [active] == (WT)w));
1916
1917 if (expect_true (active < timercnt))
1918 {
1919 timers [active] = timers [timercnt];
1920 adjustheap (timers, timercnt, active);
1921 }
1922
1923 --timercnt;
1924 }
1925
1926 ev_at (w) -= mn_now;
1927
1928 ev_stop (EV_A_ (W)w);
1929 }
1930
1931 void noinline
1932 ev_timer_again (EV_P_ ev_timer *w)
1933 {
1934 if (ev_is_active (w))
1935 {
1936 if (w->repeat)
1937 {
1938 ev_at (w) = mn_now + w->repeat;
1939 adjustheap (timers, timercnt, ev_active (w));
1940 }
1941 else
1942 ev_timer_stop (EV_A_ w);
1943 }
1944 else if (w->repeat)
1945 {
1946 ev_at (w) = w->repeat;
1947 ev_timer_start (EV_A_ w);
1948 }
1949 }
1950
1951 #if EV_PERIODIC_ENABLE
1952 void noinline
1953 ev_periodic_start (EV_P_ ev_periodic *w)
1954 {
1955 if (expect_false (ev_is_active (w)))
1956 return;
1957
1958 if (w->reschedule_cb)
1959 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1960 else if (w->interval)
1961 {
1962 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1963 /* this formula differs from the one in periodic_reify because we do not always round up */
1964 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1965 }
1966 else
1967 ev_at (w) = w->offset;
1968
1969 ev_start (EV_A_ (W)w, ++periodiccnt);
1970 array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
1971 periodics [periodiccnt] = (WT)w;
1972 upheap (periodics, periodiccnt);
1973
1974 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1975 }
1976
1977 void noinline
1978 ev_periodic_stop (EV_P_ ev_periodic *w)
1979 {
1980 clear_pending (EV_A_ (W)w);
1981 if (expect_false (!ev_is_active (w)))
1982 return;
1983
1984 {
1985 int active = ev_active (w);
1986
1987 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
1988
1989 if (expect_true (active < periodiccnt))
1990 {
1991 periodics [active] = periodics [periodiccnt];
1992 adjustheap (periodics, periodiccnt, active);
1993 }
1994
1995 --periodiccnt;
1996 }
1997
1998 ev_stop (EV_A_ (W)w);
1999 }
2000
2001 void noinline
2002 ev_periodic_again (EV_P_ ev_periodic *w)
2003 {
2004 /* TODO: use adjustheap and recalculation */
2005 ev_periodic_stop (EV_A_ w);
2006 ev_periodic_start (EV_A_ w);
2007 }
2008 #endif
2009
2010 #ifndef SA_RESTART
2011 # define SA_RESTART 0
2012 #endif
2013
2014 void noinline
2015 ev_signal_start (EV_P_ ev_signal *w)
2016 {
2017 #if EV_MULTIPLICITY
2018 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2019 #endif
2020 if (expect_false (ev_is_active (w)))
2021 return;
2022
2023 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2024
2025 evpipe_init (EV_A);
2026
2027 {
2028 #ifndef _WIN32
2029 sigset_t full, prev;
2030 sigfillset (&full);
2031 sigprocmask (SIG_SETMASK, &full, &prev);
2032 #endif
2033
2034 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2035
2036 #ifndef _WIN32
2037 sigprocmask (SIG_SETMASK, &prev, 0);
2038 #endif
2039 }
2040
2041 ev_start (EV_A_ (W)w, 1);
2042 wlist_add (&signals [w->signum - 1].head, (WL)w);
2043
2044 if (!((WL)w)->next)
2045 {
2046 #if _WIN32
2047 signal (w->signum, ev_sighandler);
2048 #else
2049 struct sigaction sa;
2050 sa.sa_handler = ev_sighandler;
2051 sigfillset (&sa.sa_mask);
2052 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2053 sigaction (w->signum, &sa, 0);
2054 #endif
2055 }
2056 }
2057
2058 void noinline
2059 ev_signal_stop (EV_P_ ev_signal *w)
2060 {
2061 clear_pending (EV_A_ (W)w);
2062 if (expect_false (!ev_is_active (w)))
2063 return;
2064
2065 wlist_del (&signals [w->signum - 1].head, (WL)w);
2066 ev_stop (EV_A_ (W)w);
2067
2068 if (!signals [w->signum - 1].head)
2069 signal (w->signum, SIG_DFL);
2070 }
2071
2072 void
2073 ev_child_start (EV_P_ ev_child *w)
2074 {
2075 #if EV_MULTIPLICITY
2076 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2077 #endif
2078 if (expect_false (ev_is_active (w)))
2079 return;
2080
2081 ev_start (EV_A_ (W)w, 1);
2082 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2083 }
2084
2085 void
2086 ev_child_stop (EV_P_ ev_child *w)
2087 {
2088 clear_pending (EV_A_ (W)w);
2089 if (expect_false (!ev_is_active (w)))
2090 return;
2091
2092 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2093 ev_stop (EV_A_ (W)w);
2094 }
2095
2096 #if EV_STAT_ENABLE
2097
2098 # ifdef _WIN32
2099 # undef lstat
2100 # define lstat(a,b) _stati64 (a,b)
2101 # endif
2102
2103 #define DEF_STAT_INTERVAL 5.0074891
2104 #define MIN_STAT_INTERVAL 0.1074891
2105
2106 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2107
2108 #if EV_USE_INOTIFY
2109 # define EV_INOTIFY_BUFSIZE 8192
2110
2111 static void noinline
2112 infy_add (EV_P_ ev_stat *w)
2113 {
2114 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);
2115
2116 if (w->wd < 0)
2117 {
2118 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2119
2120 /* monitor some parent directory for speedup hints */
2121 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2122 {
2123 char path [4096];
2124 strcpy (path, w->path);
2125
2126 do
2127 {
2128 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2129 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2130
2131 char *pend = strrchr (path, '/');
2132
2133 if (!pend)
2134 break; /* whoops, no '/', complain to your admin */
2135
2136 *pend = 0;
2137 w->wd = inotify_add_watch (fs_fd, path, mask);
2138 }
2139 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2140 }
2141 }
2142 else
2143 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2144
2145 if (w->wd >= 0)
2146 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2147 }
2148
2149 static void noinline
2150 infy_del (EV_P_ ev_stat *w)
2151 {
2152 int slot;
2153 int wd = w->wd;
2154
2155 if (wd < 0)
2156 return;
2157
2158 w->wd = -2;
2159 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2160 wlist_del (&fs_hash [slot].head, (WL)w);
2161
2162 /* remove this watcher, if others are watching it, they will rearm */
2163 inotify_rm_watch (fs_fd, wd);
2164 }
2165
2166 static void noinline
2167 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2168 {
2169 if (slot < 0)
2170 /* overflow, need to check for all hahs slots */
2171 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2172 infy_wd (EV_A_ slot, wd, ev);
2173 else
2174 {
2175 WL w_;
2176
2177 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2178 {
2179 ev_stat *w = (ev_stat *)w_;
2180 w_ = w_->next; /* lets us remove this watcher and all before it */
2181
2182 if (w->wd == wd || wd == -1)
2183 {
2184 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2185 {
2186 w->wd = -1;
2187 infy_add (EV_A_ w); /* re-add, no matter what */
2188 }
2189
2190 stat_timer_cb (EV_A_ &w->timer, 0);
2191 }
2192 }
2193 }
2194 }
2195
2196 static void
2197 infy_cb (EV_P_ ev_io *w, int revents)
2198 {
2199 char buf [EV_INOTIFY_BUFSIZE];
2200 struct inotify_event *ev = (struct inotify_event *)buf;
2201 int ofs;
2202 int len = read (fs_fd, buf, sizeof (buf));
2203
2204 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2205 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2206 }
2207
2208 void inline_size
2209 infy_init (EV_P)
2210 {
2211 if (fs_fd != -2)
2212 return;
2213
2214 fs_fd = inotify_init ();
2215
2216 if (fs_fd >= 0)
2217 {
2218 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2219 ev_set_priority (&fs_w, EV_MAXPRI);
2220 ev_io_start (EV_A_ &fs_w);
2221 }
2222 }
2223
2224 void inline_size
2225 infy_fork (EV_P)
2226 {
2227 int slot;
2228
2229 if (fs_fd < 0)
2230 return;
2231
2232 close (fs_fd);
2233 fs_fd = inotify_init ();
2234
2235 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2236 {
2237 WL w_ = fs_hash [slot].head;
2238 fs_hash [slot].head = 0;
2239
2240 while (w_)
2241 {
2242 ev_stat *w = (ev_stat *)w_;
2243 w_ = w_->next; /* lets us add this watcher */
2244
2245 w->wd = -1;
2246
2247 if (fs_fd >= 0)
2248 infy_add (EV_A_ w); /* re-add, no matter what */
2249 else
2250 ev_timer_start (EV_A_ &w->timer);
2251 }
2252
2253 }
2254 }
2255
2256 #endif
2257
2258 void
2259 ev_stat_stat (EV_P_ ev_stat *w)
2260 {
2261 if (lstat (w->path, &w->attr) < 0)
2262 w->attr.st_nlink = 0;
2263 else if (!w->attr.st_nlink)
2264 w->attr.st_nlink = 1;
2265 }
2266
2267 static void noinline
2268 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2269 {
2270 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2271
2272 /* we copy this here each the time so that */
2273 /* prev has the old value when the callback gets invoked */
2274 w->prev = w->attr;
2275 ev_stat_stat (EV_A_ w);
2276
2277 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2278 if (
2279 w->prev.st_dev != w->attr.st_dev
2280 || w->prev.st_ino != w->attr.st_ino
2281 || w->prev.st_mode != w->attr.st_mode
2282 || w->prev.st_nlink != w->attr.st_nlink
2283 || w->prev.st_uid != w->attr.st_uid
2284 || w->prev.st_gid != w->attr.st_gid
2285 || w->prev.st_rdev != w->attr.st_rdev
2286 || w->prev.st_size != w->attr.st_size
2287 || w->prev.st_atime != w->attr.st_atime
2288 || w->prev.st_mtime != w->attr.st_mtime
2289 || w->prev.st_ctime != w->attr.st_ctime
2290 ) {
2291 #if EV_USE_INOTIFY
2292 infy_del (EV_A_ w);
2293 infy_add (EV_A_ w);
2294 ev_stat_stat (EV_A_ w); /* avoid race... */
2295 #endif
2296
2297 ev_feed_event (EV_A_ w, EV_STAT);
2298 }
2299 }
2300
2301 void
2302 ev_stat_start (EV_P_ ev_stat *w)
2303 {
2304 if (expect_false (ev_is_active (w)))
2305 return;
2306
2307 /* since we use memcmp, we need to clear any padding data etc. */
2308 memset (&w->prev, 0, sizeof (ev_statdata));
2309 memset (&w->attr, 0, sizeof (ev_statdata));
2310
2311 ev_stat_stat (EV_A_ w);
2312
2313 if (w->interval < MIN_STAT_INTERVAL)
2314 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2315
2316 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2317 ev_set_priority (&w->timer, ev_priority (w));
2318
2319 #if EV_USE_INOTIFY
2320 infy_init (EV_A);
2321
2322 if (fs_fd >= 0)
2323 infy_add (EV_A_ w);
2324 else
2325 #endif
2326 ev_timer_start (EV_A_ &w->timer);
2327
2328 ev_start (EV_A_ (W)w, 1);
2329 }
2330
2331 void
2332 ev_stat_stop (EV_P_ ev_stat *w)
2333 {
2334 clear_pending (EV_A_ (W)w);
2335 if (expect_false (!ev_is_active (w)))
2336 return;
2337
2338 #if EV_USE_INOTIFY
2339 infy_del (EV_A_ w);
2340 #endif
2341 ev_timer_stop (EV_A_ &w->timer);
2342
2343 ev_stop (EV_A_ (W)w);
2344 }
2345 #endif
2346
2347 #if EV_IDLE_ENABLE
2348 void
2349 ev_idle_start (EV_P_ ev_idle *w)
2350 {
2351 if (expect_false (ev_is_active (w)))
2352 return;
2353
2354 pri_adjust (EV_A_ (W)w);
2355
2356 {
2357 int active = ++idlecnt [ABSPRI (w)];
2358
2359 ++idleall;
2360 ev_start (EV_A_ (W)w, active);
2361
2362 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2363 idles [ABSPRI (w)][active - 1] = w;
2364 }
2365 }
2366
2367 void
2368 ev_idle_stop (EV_P_ ev_idle *w)
2369 {
2370 clear_pending (EV_A_ (W)w);
2371 if (expect_false (!ev_is_active (w)))
2372 return;
2373
2374 {
2375 int active = ev_active (w);
2376
2377 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2378 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2379
2380 ev_stop (EV_A_ (W)w);
2381 --idleall;
2382 }
2383 }
2384 #endif
2385
2386 void
2387 ev_prepare_start (EV_P_ ev_prepare *w)
2388 {
2389 if (expect_false (ev_is_active (w)))
2390 return;
2391
2392 ev_start (EV_A_ (W)w, ++preparecnt);
2393 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2394 prepares [preparecnt - 1] = w;
2395 }
2396
2397 void
2398 ev_prepare_stop (EV_P_ ev_prepare *w)
2399 {
2400 clear_pending (EV_A_ (W)w);
2401 if (expect_false (!ev_is_active (w)))
2402 return;
2403
2404 {
2405 int active = ev_active (w);
2406
2407 prepares [active - 1] = prepares [--preparecnt];
2408 ev_active (prepares [active - 1]) = active;
2409 }
2410
2411 ev_stop (EV_A_ (W)w);
2412 }
2413
2414 void
2415 ev_check_start (EV_P_ ev_check *w)
2416 {
2417 if (expect_false (ev_is_active (w)))
2418 return;
2419
2420 ev_start (EV_A_ (W)w, ++checkcnt);
2421 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2422 checks [checkcnt - 1] = w;
2423 }
2424
2425 void
2426 ev_check_stop (EV_P_ ev_check *w)
2427 {
2428 clear_pending (EV_A_ (W)w);
2429 if (expect_false (!ev_is_active (w)))
2430 return;
2431
2432 {
2433 int active = ev_active (w);
2434
2435 checks [active - 1] = checks [--checkcnt];
2436 ev_active (checks [active - 1]) = active;
2437 }
2438
2439 ev_stop (EV_A_ (W)w);
2440 }
2441
2442 #if EV_EMBED_ENABLE
2443 void noinline
2444 ev_embed_sweep (EV_P_ ev_embed *w)
2445 {
2446 ev_loop (w->other, EVLOOP_NONBLOCK);
2447 }
2448
2449 static void
2450 embed_io_cb (EV_P_ ev_io *io, int revents)
2451 {
2452 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2453
2454 if (ev_cb (w))
2455 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2456 else
2457 ev_loop (w->other, EVLOOP_NONBLOCK);
2458 }
2459
2460 static void
2461 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2462 {
2463 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2464
2465 {
2466 struct ev_loop *loop = w->other;
2467
2468 while (fdchangecnt)
2469 {
2470 fd_reify (EV_A);
2471 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2472 }
2473 }
2474 }
2475
2476 #if 0
2477 static void
2478 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2479 {
2480 ev_idle_stop (EV_A_ idle);
2481 }
2482 #endif
2483
2484 void
2485 ev_embed_start (EV_P_ ev_embed *w)
2486 {
2487 if (expect_false (ev_is_active (w)))
2488 return;
2489
2490 {
2491 struct ev_loop *loop = w->other;
2492 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2493 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2494 }
2495
2496 ev_set_priority (&w->io, ev_priority (w));
2497 ev_io_start (EV_A_ &w->io);
2498
2499 ev_prepare_init (&w->prepare, embed_prepare_cb);
2500 ev_set_priority (&w->prepare, EV_MINPRI);
2501 ev_prepare_start (EV_A_ &w->prepare);
2502
2503 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2504
2505 ev_start (EV_A_ (W)w, 1);
2506 }
2507
2508 void
2509 ev_embed_stop (EV_P_ ev_embed *w)
2510 {
2511 clear_pending (EV_A_ (W)w);
2512 if (expect_false (!ev_is_active (w)))
2513 return;
2514
2515 ev_io_stop (EV_A_ &w->io);
2516 ev_prepare_stop (EV_A_ &w->prepare);
2517
2518 ev_stop (EV_A_ (W)w);
2519 }
2520 #endif
2521
2522 #if EV_FORK_ENABLE
2523 void
2524 ev_fork_start (EV_P_ ev_fork *w)
2525 {
2526 if (expect_false (ev_is_active (w)))
2527 return;
2528
2529 ev_start (EV_A_ (W)w, ++forkcnt);
2530 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2531 forks [forkcnt - 1] = w;
2532 }
2533
2534 void
2535 ev_fork_stop (EV_P_ ev_fork *w)
2536 {
2537 clear_pending (EV_A_ (W)w);
2538 if (expect_false (!ev_is_active (w)))
2539 return;
2540
2541 {
2542 int active = ev_active (w);
2543
2544 forks [active - 1] = forks [--forkcnt];
2545 ev_active (forks [active - 1]) = active;
2546 }
2547
2548 ev_stop (EV_A_ (W)w);
2549 }
2550 #endif
2551
2552 #if EV_ASYNC_ENABLE
2553 void
2554 ev_async_start (EV_P_ ev_async *w)
2555 {
2556 if (expect_false (ev_is_active (w)))
2557 return;
2558
2559 evpipe_init (EV_A);
2560
2561 ev_start (EV_A_ (W)w, ++asynccnt);
2562 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2563 asyncs [asynccnt - 1] = w;
2564 }
2565
2566 void
2567 ev_async_stop (EV_P_ ev_async *w)
2568 {
2569 clear_pending (EV_A_ (W)w);
2570 if (expect_false (!ev_is_active (w)))
2571 return;
2572
2573 {
2574 int active = ev_active (w);
2575
2576 asyncs [active - 1] = asyncs [--asynccnt];
2577 ev_active (asyncs [active - 1]) = active;
2578 }
2579
2580 ev_stop (EV_A_ (W)w);
2581 }
2582
2583 void
2584 ev_async_send (EV_P_ ev_async *w)
2585 {
2586 w->sent = 1;
2587 evpipe_write (EV_A_ &gotasync);
2588 }
2589 #endif
2590
2591 /*****************************************************************************/
2592
2593 struct ev_once
2594 {
2595 ev_io io;
2596 ev_timer to;
2597 void (*cb)(int revents, void *arg);
2598 void *arg;
2599 };
2600
2601 static void
2602 once_cb (EV_P_ struct ev_once *once, int revents)
2603 {
2604 void (*cb)(int revents, void *arg) = once->cb;
2605 void *arg = once->arg;
2606
2607 ev_io_stop (EV_A_ &once->io);
2608 ev_timer_stop (EV_A_ &once->to);
2609 ev_free (once);
2610
2611 cb (revents, arg);
2612 }
2613
2614 static void
2615 once_cb_io (EV_P_ ev_io *w, int revents)
2616 {
2617 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
2618 }
2619
2620 static void
2621 once_cb_to (EV_P_ ev_timer *w, int revents)
2622 {
2623 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
2624 }
2625
2626 void
2627 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2628 {
2629 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2630
2631 if (expect_false (!once))
2632 {
2633 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2634 return;
2635 }
2636
2637 once->cb = cb;
2638 once->arg = arg;
2639
2640 ev_init (&once->io, once_cb_io);
2641 if (fd >= 0)
2642 {
2643 ev_io_set (&once->io, fd, events);
2644 ev_io_start (EV_A_ &once->io);
2645 }
2646
2647 ev_init (&once->to, once_cb_to);
2648 if (timeout >= 0.)
2649 {
2650 ev_timer_set (&once->to, timeout, 0.);
2651 ev_timer_start (EV_A_ &once->to);
2652 }
2653 }
2654
2655 #if EV_MULTIPLICITY
2656 #include "ev_wrap.h"
2657 #endif
2658
2659 #ifdef __cplusplus
2660 }
2661 #endif
2662