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Revision: 1.268
Committed: Mon Oct 27 13:39:18 2008 UTC (15 years, 6 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.267: +1 -0 lines
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File Contents

# Content
1 /*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
38 */
39
40 #ifdef __cplusplus
41 extern "C" {
42 #endif
43
44 /* this big block deduces configuration from config.h */
45 #ifndef EV_STANDALONE
46 # ifdef EV_CONFIG_H
47 # include EV_CONFIG_H
48 # else
49 # include "config.h"
50 # endif
51
52 # if HAVE_CLOCK_GETTIME
53 # ifndef EV_USE_MONOTONIC
54 # define EV_USE_MONOTONIC 1
55 # endif
56 # ifndef EV_USE_REALTIME
57 # define EV_USE_REALTIME 1
58 # endif
59 # else
60 # ifndef EV_USE_MONOTONIC
61 # define EV_USE_MONOTONIC 0
62 # endif
63 # ifndef EV_USE_REALTIME
64 # define EV_USE_REALTIME 0
65 # endif
66 # endif
67
68 # ifndef EV_USE_NANOSLEEP
69 # if HAVE_NANOSLEEP
70 # define EV_USE_NANOSLEEP 1
71 # else
72 # define EV_USE_NANOSLEEP 0
73 # endif
74 # endif
75
76 # ifndef EV_USE_SELECT
77 # if HAVE_SELECT && HAVE_SYS_SELECT_H
78 # define EV_USE_SELECT 1
79 # else
80 # define EV_USE_SELECT 0
81 # endif
82 # endif
83
84 # ifndef EV_USE_POLL
85 # if HAVE_POLL && HAVE_POLL_H
86 # define EV_USE_POLL 1
87 # else
88 # define EV_USE_POLL 0
89 # endif
90 # endif
91
92 # ifndef EV_USE_EPOLL
93 # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94 # define EV_USE_EPOLL 1
95 # else
96 # define EV_USE_EPOLL 0
97 # endif
98 # endif
99
100 # ifndef EV_USE_KQUEUE
101 # if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102 # define EV_USE_KQUEUE 1
103 # else
104 # define EV_USE_KQUEUE 0
105 # endif
106 # endif
107
108 # ifndef EV_USE_PORT
109 # if HAVE_PORT_H && HAVE_PORT_CREATE
110 # define EV_USE_PORT 1
111 # else
112 # define EV_USE_PORT 0
113 # endif
114 # endif
115
116 # ifndef EV_USE_INOTIFY
117 # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118 # define EV_USE_INOTIFY 1
119 # else
120 # define EV_USE_INOTIFY 0
121 # endif
122 # endif
123
124 # ifndef EV_USE_EVENTFD
125 # if HAVE_EVENTFD
126 # define EV_USE_EVENTFD 1
127 # else
128 # define EV_USE_EVENTFD 0
129 # endif
130 # endif
131
132 #endif
133
134 #include <math.h>
135 #include <stdlib.h>
136 #include <fcntl.h>
137 #include <stddef.h>
138
139 #include <stdio.h>
140
141 #include <assert.h>
142 #include <errno.h>
143 #include <sys/types.h>
144 #include <time.h>
145
146 #include <signal.h>
147
148 #ifdef EV_H
149 # include EV_H
150 #else
151 # include "ev.h"
152 #endif
153
154 #ifndef _WIN32
155 # include <sys/time.h>
156 # include <sys/wait.h>
157 # include <unistd.h>
158 #else
159 # include <io.h>
160 # define WIN32_LEAN_AND_MEAN
161 # include <windows.h>
162 # ifndef EV_SELECT_IS_WINSOCKET
163 # define EV_SELECT_IS_WINSOCKET 1
164 # endif
165 #endif
166
167 /* this block tries to deduce configuration from header-defined symbols and defaults */
168
169 #ifndef EV_USE_MONOTONIC
170 # if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171 # define EV_USE_MONOTONIC 1
172 # else
173 # define EV_USE_MONOTONIC 0
174 # endif
175 #endif
176
177 #ifndef EV_USE_REALTIME
178 # define EV_USE_REALTIME 0
179 #endif
180
181 #ifndef EV_USE_NANOSLEEP
182 # if _POSIX_C_SOURCE >= 199309L
183 # define EV_USE_NANOSLEEP 1
184 # else
185 # define EV_USE_NANOSLEEP 0
186 # endif
187 #endif
188
189 #ifndef EV_USE_SELECT
190 # define EV_USE_SELECT 1
191 #endif
192
193 #ifndef EV_USE_POLL
194 # ifdef _WIN32
195 # define EV_USE_POLL 0
196 # else
197 # define EV_USE_POLL 1
198 # endif
199 #endif
200
201 #ifndef EV_USE_EPOLL
202 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203 # define EV_USE_EPOLL 1
204 # else
205 # define EV_USE_EPOLL 0
206 # endif
207 #endif
208
209 #ifndef EV_USE_KQUEUE
210 # define EV_USE_KQUEUE 0
211 #endif
212
213 #ifndef EV_USE_PORT
214 # define EV_USE_PORT 0
215 #endif
216
217 #ifndef EV_USE_INOTIFY
218 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
219 # define EV_USE_INOTIFY 1
220 # else
221 # define EV_USE_INOTIFY 0
222 # endif
223 #endif
224
225 #ifndef EV_PID_HASHSIZE
226 # if EV_MINIMAL
227 # define EV_PID_HASHSIZE 1
228 # else
229 # define EV_PID_HASHSIZE 16
230 # endif
231 #endif
232
233 #ifndef EV_INOTIFY_HASHSIZE
234 # if EV_MINIMAL
235 # define EV_INOTIFY_HASHSIZE 1
236 # else
237 # define EV_INOTIFY_HASHSIZE 16
238 # endif
239 #endif
240
241 #ifndef EV_USE_EVENTFD
242 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243 # define EV_USE_EVENTFD 1
244 # else
245 # define EV_USE_EVENTFD 0
246 # endif
247 #endif
248
249 #if 0 /* debugging */
250 # define EV_VERIFY 3
251 # define EV_USE_4HEAP 1
252 # define EV_HEAP_CACHE_AT 1
253 #endif
254
255 #ifndef EV_VERIFY
256 # define EV_VERIFY !EV_MINIMAL
257 #endif
258
259 #ifndef EV_USE_4HEAP
260 # define EV_USE_4HEAP !EV_MINIMAL
261 #endif
262
263 #ifndef EV_HEAP_CACHE_AT
264 # define EV_HEAP_CACHE_AT !EV_MINIMAL
265 #endif
266
267 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
268
269 #ifndef CLOCK_MONOTONIC
270 # undef EV_USE_MONOTONIC
271 # define EV_USE_MONOTONIC 0
272 #endif
273
274 #ifndef CLOCK_REALTIME
275 # undef EV_USE_REALTIME
276 # define EV_USE_REALTIME 0
277 #endif
278
279 #if !EV_STAT_ENABLE
280 # undef EV_USE_INOTIFY
281 # define EV_USE_INOTIFY 0
282 #endif
283
284 #if !EV_USE_NANOSLEEP
285 # ifndef _WIN32
286 # include <sys/select.h>
287 # endif
288 #endif
289
290 #if EV_USE_INOTIFY
291 # include <sys/utsname.h>
292 # include <sys/inotify.h>
293 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294 # ifndef IN_DONT_FOLLOW
295 # undef EV_USE_INOTIFY
296 # define EV_USE_INOTIFY 0
297 # endif
298 #endif
299
300 #if EV_SELECT_IS_WINSOCKET
301 # include <winsock.h>
302 #endif
303
304 #if EV_USE_EVENTFD
305 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306 # include <stdint.h>
307 # ifdef __cplusplus
308 extern "C" {
309 # endif
310 int eventfd (unsigned int initval, int flags);
311 # ifdef __cplusplus
312 }
313 # endif
314 #endif
315
316 /**/
317
318 #if EV_VERIFY >= 3
319 # define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
320 #else
321 # define EV_FREQUENT_CHECK do { } while (0)
322 #endif
323
324 /*
325 * This is used to avoid floating point rounding problems.
326 * It is added to ev_rt_now when scheduling periodics
327 * to ensure progress, time-wise, even when rounding
328 * errors are against us.
329 * This value is good at least till the year 4000.
330 * Better solutions welcome.
331 */
332 #define TIME_EPSILON 0.0001220703125 /* 1/8192 */
333
334 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
335 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
336 /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
337
338 #if __GNUC__ >= 4
339 # define expect(expr,value) __builtin_expect ((expr),(value))
340 # define noinline __attribute__ ((noinline))
341 #else
342 # define expect(expr,value) (expr)
343 # define noinline
344 # if __STDC_VERSION__ < 199901L && __GNUC__ < 2
345 # define inline
346 # endif
347 #endif
348
349 #define expect_false(expr) expect ((expr) != 0, 0)
350 #define expect_true(expr) expect ((expr) != 0, 1)
351 #define inline_size static inline
352
353 #if EV_MINIMAL
354 # define inline_speed static noinline
355 #else
356 # define inline_speed static inline
357 #endif
358
359 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
360 #define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
361
362 #define EMPTY /* required for microsofts broken pseudo-c compiler */
363 #define EMPTY2(a,b) /* used to suppress some warnings */
364
365 typedef ev_watcher *W;
366 typedef ev_watcher_list *WL;
367 typedef ev_watcher_time *WT;
368
369 #define ev_active(w) ((W)(w))->active
370 #define ev_at(w) ((WT)(w))->at
371
372 #if EV_USE_MONOTONIC
373 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
374 /* giving it a reasonably high chance of working on typical architetcures */
375 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376 #endif
377
378 #ifdef _WIN32
379 # include "ev_win32.c"
380 #endif
381
382 /*****************************************************************************/
383
384 static void (*syserr_cb)(const char *msg);
385
386 void
387 ev_set_syserr_cb (void (*cb)(const char *msg))
388 {
389 syserr_cb = cb;
390 }
391
392 static void noinline
393 syserr (const char *msg)
394 {
395 if (!msg)
396 msg = "(libev) system error";
397
398 if (syserr_cb)
399 syserr_cb (msg);
400 else
401 {
402 perror (msg);
403 abort ();
404 }
405 }
406
407 static void *
408 ev_realloc_emul (void *ptr, long size)
409 {
410 /* some systems, notably openbsd and darwin, fail to properly
411 * implement realloc (x, 0) (as required by both ansi c-98 and
412 * the single unix specification, so work around them here.
413 */
414
415 if (size)
416 return realloc (ptr, size);
417
418 free (ptr);
419 return 0;
420 }
421
422 static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
423
424 void
425 ev_set_allocator (void *(*cb)(void *ptr, long size))
426 {
427 alloc = cb;
428 }
429
430 inline_speed void *
431 ev_realloc (void *ptr, long size)
432 {
433 ptr = alloc (ptr, size);
434
435 if (!ptr && size)
436 {
437 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
438 abort ();
439 }
440
441 return ptr;
442 }
443
444 #define ev_malloc(size) ev_realloc (0, (size))
445 #define ev_free(ptr) ev_realloc ((ptr), 0)
446
447 /*****************************************************************************/
448
449 typedef struct
450 {
451 WL head;
452 unsigned char events;
453 unsigned char reify;
454 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455 unsigned char egen; /* generation counter to counter epoll bugs */
456 #if EV_SELECT_IS_WINSOCKET
457 SOCKET handle;
458 #endif
459 } ANFD;
460
461 typedef struct
462 {
463 W w;
464 int events;
465 } ANPENDING;
466
467 #if EV_USE_INOTIFY
468 /* hash table entry per inotify-id */
469 typedef struct
470 {
471 WL head;
472 } ANFS;
473 #endif
474
475 /* Heap Entry */
476 #if EV_HEAP_CACHE_AT
477 typedef struct {
478 ev_tstamp at;
479 WT w;
480 } ANHE;
481
482 #define ANHE_w(he) (he).w /* access watcher, read-write */
483 #define ANHE_at(he) (he).at /* access cached at, read-only */
484 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
485 #else
486 typedef WT ANHE;
487
488 #define ANHE_w(he) (he)
489 #define ANHE_at(he) (he)->at
490 #define ANHE_at_cache(he)
491 #endif
492
493 #if EV_MULTIPLICITY
494
495 struct ev_loop
496 {
497 ev_tstamp ev_rt_now;
498 #define ev_rt_now ((loop)->ev_rt_now)
499 #define VAR(name,decl) decl;
500 #include "ev_vars.h"
501 #undef VAR
502 };
503 #include "ev_wrap.h"
504
505 static struct ev_loop default_loop_struct;
506 struct ev_loop *ev_default_loop_ptr;
507
508 #else
509
510 ev_tstamp ev_rt_now;
511 #define VAR(name,decl) static decl;
512 #include "ev_vars.h"
513 #undef VAR
514
515 static int ev_default_loop_ptr;
516
517 #endif
518
519 /*****************************************************************************/
520
521 ev_tstamp
522 ev_time (void)
523 {
524 #if EV_USE_REALTIME
525 struct timespec ts;
526 clock_gettime (CLOCK_REALTIME, &ts);
527 return ts.tv_sec + ts.tv_nsec * 1e-9;
528 #else
529 struct timeval tv;
530 gettimeofday (&tv, 0);
531 return tv.tv_sec + tv.tv_usec * 1e-6;
532 #endif
533 }
534
535 ev_tstamp inline_size
536 get_clock (void)
537 {
538 #if EV_USE_MONOTONIC
539 if (expect_true (have_monotonic))
540 {
541 struct timespec ts;
542 clock_gettime (CLOCK_MONOTONIC, &ts);
543 return ts.tv_sec + ts.tv_nsec * 1e-9;
544 }
545 #endif
546
547 return ev_time ();
548 }
549
550 #if EV_MULTIPLICITY
551 ev_tstamp
552 ev_now (EV_P)
553 {
554 return ev_rt_now;
555 }
556 #endif
557
558 void
559 ev_sleep (ev_tstamp delay)
560 {
561 if (delay > 0.)
562 {
563 #if EV_USE_NANOSLEEP
564 struct timespec ts;
565
566 ts.tv_sec = (time_t)delay;
567 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
568
569 nanosleep (&ts, 0);
570 #elif defined(_WIN32)
571 Sleep ((unsigned long)(delay * 1e3));
572 #else
573 struct timeval tv;
574
575 tv.tv_sec = (time_t)delay;
576 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577
578 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
579 /* somehting nto guaranteed by newer posix versions, but guaranteed */
580 /* by older ones */
581 select (0, 0, 0, 0, &tv);
582 #endif
583 }
584 }
585
586 /*****************************************************************************/
587
588 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
589
590 int inline_size
591 array_nextsize (int elem, int cur, int cnt)
592 {
593 int ncur = cur + 1;
594
595 do
596 ncur <<= 1;
597 while (cnt > ncur);
598
599 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
600 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
601 {
602 ncur *= elem;
603 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
604 ncur = ncur - sizeof (void *) * 4;
605 ncur /= elem;
606 }
607
608 return ncur;
609 }
610
611 static noinline void *
612 array_realloc (int elem, void *base, int *cur, int cnt)
613 {
614 *cur = array_nextsize (elem, *cur, cnt);
615 return ev_realloc (base, elem * *cur);
616 }
617
618 #define array_init_zero(base,count) \
619 memset ((void *)(base), 0, sizeof (*(base)) * (count))
620
621 #define array_needsize(type,base,cur,cnt,init) \
622 if (expect_false ((cnt) > (cur))) \
623 { \
624 int ocur_ = (cur); \
625 (base) = (type *)array_realloc \
626 (sizeof (type), (base), &(cur), (cnt)); \
627 init ((base) + (ocur_), (cur) - ocur_); \
628 }
629
630 #if 0
631 #define array_slim(type,stem) \
632 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
633 { \
634 stem ## max = array_roundsize (stem ## cnt >> 1); \
635 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
636 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
637 }
638 #endif
639
640 #define array_free(stem, idx) \
641 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
642
643 /*****************************************************************************/
644
645 void noinline
646 ev_feed_event (EV_P_ void *w, int revents)
647 {
648 W w_ = (W)w;
649 int pri = ABSPRI (w_);
650
651 if (expect_false (w_->pending))
652 pendings [pri][w_->pending - 1].events |= revents;
653 else
654 {
655 w_->pending = ++pendingcnt [pri];
656 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
657 pendings [pri][w_->pending - 1].w = w_;
658 pendings [pri][w_->pending - 1].events = revents;
659 }
660 }
661
662 void inline_speed
663 queue_events (EV_P_ W *events, int eventcnt, int type)
664 {
665 int i;
666
667 for (i = 0; i < eventcnt; ++i)
668 ev_feed_event (EV_A_ events [i], type);
669 }
670
671 /*****************************************************************************/
672
673 void inline_speed
674 fd_event (EV_P_ int fd, int revents)
675 {
676 ANFD *anfd = anfds + fd;
677 ev_io *w;
678
679 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
680 {
681 int ev = w->events & revents;
682
683 if (ev)
684 ev_feed_event (EV_A_ (W)w, ev);
685 }
686 }
687
688 void
689 ev_feed_fd_event (EV_P_ int fd, int revents)
690 {
691 if (fd >= 0 && fd < anfdmax)
692 fd_event (EV_A_ fd, revents);
693 }
694
695 void inline_size
696 fd_reify (EV_P)
697 {
698 int i;
699
700 for (i = 0; i < fdchangecnt; ++i)
701 {
702 int fd = fdchanges [i];
703 ANFD *anfd = anfds + fd;
704 ev_io *w;
705
706 unsigned char events = 0;
707
708 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
709 events |= (unsigned char)w->events;
710
711 #if EV_SELECT_IS_WINSOCKET
712 if (events)
713 {
714 unsigned long arg;
715 #ifdef EV_FD_TO_WIN32_HANDLE
716 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717 #else
718 anfd->handle = _get_osfhandle (fd);
719 #endif
720 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
721 }
722 #endif
723
724 {
725 unsigned char o_events = anfd->events;
726 unsigned char o_reify = anfd->reify;
727
728 anfd->reify = 0;
729 anfd->events = events;
730
731 if (o_events != events || o_reify & EV_IOFDSET)
732 backend_modify (EV_A_ fd, o_events, events);
733 }
734 }
735
736 fdchangecnt = 0;
737 }
738
739 void inline_size
740 fd_change (EV_P_ int fd, int flags)
741 {
742 unsigned char reify = anfds [fd].reify;
743 anfds [fd].reify |= flags;
744
745 if (expect_true (!reify))
746 {
747 ++fdchangecnt;
748 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
749 fdchanges [fdchangecnt - 1] = fd;
750 }
751 }
752
753 void inline_speed
754 fd_kill (EV_P_ int fd)
755 {
756 ev_io *w;
757
758 while ((w = (ev_io *)anfds [fd].head))
759 {
760 ev_io_stop (EV_A_ w);
761 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
762 }
763 }
764
765 int inline_size
766 fd_valid (int fd)
767 {
768 #ifdef _WIN32
769 return _get_osfhandle (fd) != -1;
770 #else
771 return fcntl (fd, F_GETFD) != -1;
772 #endif
773 }
774
775 /* called on EBADF to verify fds */
776 static void noinline
777 fd_ebadf (EV_P)
778 {
779 int fd;
780
781 for (fd = 0; fd < anfdmax; ++fd)
782 if (anfds [fd].events)
783 if (!fd_valid (fd) && errno == EBADF)
784 fd_kill (EV_A_ fd);
785 }
786
787 /* called on ENOMEM in select/poll to kill some fds and retry */
788 static void noinline
789 fd_enomem (EV_P)
790 {
791 int fd;
792
793 for (fd = anfdmax; fd--; )
794 if (anfds [fd].events)
795 {
796 fd_kill (EV_A_ fd);
797 return;
798 }
799 }
800
801 /* usually called after fork if backend needs to re-arm all fds from scratch */
802 static void noinline
803 fd_rearm_all (EV_P)
804 {
805 int fd;
806
807 for (fd = 0; fd < anfdmax; ++fd)
808 if (anfds [fd].events)
809 {
810 anfds [fd].events = 0;
811 anfds [fd].emask = 0;
812 fd_change (EV_A_ fd, EV_IOFDSET | 1);
813 }
814 }
815
816 /*****************************************************************************/
817
818 /*
819 * the heap functions want a real array index. array index 0 uis guaranteed to not
820 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
821 * the branching factor of the d-tree.
822 */
823
824 /*
825 * at the moment we allow libev the luxury of two heaps,
826 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
827 * which is more cache-efficient.
828 * the difference is about 5% with 50000+ watchers.
829 */
830 #if EV_USE_4HEAP
831
832 #define DHEAP 4
833 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
834 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
835 #define UPHEAP_DONE(p,k) ((p) == (k))
836
837 /* away from the root */
838 void inline_speed
839 downheap (ANHE *heap, int N, int k)
840 {
841 ANHE he = heap [k];
842 ANHE *E = heap + N + HEAP0;
843
844 for (;;)
845 {
846 ev_tstamp minat;
847 ANHE *minpos;
848 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
849
850 /* find minimum child */
851 if (expect_true (pos + DHEAP - 1 < E))
852 {
853 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
854 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
855 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
856 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
857 }
858 else if (pos < E)
859 {
860 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
861 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
862 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
863 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
864 }
865 else
866 break;
867
868 if (ANHE_at (he) <= minat)
869 break;
870
871 heap [k] = *minpos;
872 ev_active (ANHE_w (*minpos)) = k;
873
874 k = minpos - heap;
875 }
876
877 heap [k] = he;
878 ev_active (ANHE_w (he)) = k;
879 }
880
881 #else /* 4HEAP */
882
883 #define HEAP0 1
884 #define HPARENT(k) ((k) >> 1)
885 #define UPHEAP_DONE(p,k) (!(p))
886
887 /* away from the root */
888 void inline_speed
889 downheap (ANHE *heap, int N, int k)
890 {
891 ANHE he = heap [k];
892
893 for (;;)
894 {
895 int c = k << 1;
896
897 if (c > N + HEAP0 - 1)
898 break;
899
900 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
901 ? 1 : 0;
902
903 if (ANHE_at (he) <= ANHE_at (heap [c]))
904 break;
905
906 heap [k] = heap [c];
907 ev_active (ANHE_w (heap [k])) = k;
908
909 k = c;
910 }
911
912 heap [k] = he;
913 ev_active (ANHE_w (he)) = k;
914 }
915 #endif
916
917 /* towards the root */
918 void inline_speed
919 upheap (ANHE *heap, int k)
920 {
921 ANHE he = heap [k];
922
923 for (;;)
924 {
925 int p = HPARENT (k);
926
927 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
928 break;
929
930 heap [k] = heap [p];
931 ev_active (ANHE_w (heap [k])) = k;
932 k = p;
933 }
934
935 heap [k] = he;
936 ev_active (ANHE_w (he)) = k;
937 }
938
939 void inline_size
940 adjustheap (ANHE *heap, int N, int k)
941 {
942 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
943 upheap (heap, k);
944 else
945 downheap (heap, N, k);
946 }
947
948 /* rebuild the heap: this function is used only once and executed rarely */
949 void inline_size
950 reheap (ANHE *heap, int N)
951 {
952 int i;
953
954 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
955 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
956 for (i = 0; i < N; ++i)
957 upheap (heap, i + HEAP0);
958 }
959
960 /*****************************************************************************/
961
962 typedef struct
963 {
964 WL head;
965 EV_ATOMIC_T gotsig;
966 } ANSIG;
967
968 static ANSIG *signals;
969 static int signalmax;
970
971 static EV_ATOMIC_T gotsig;
972
973 /*****************************************************************************/
974
975 void inline_speed
976 fd_intern (int fd)
977 {
978 #ifdef _WIN32
979 unsigned long arg = 1;
980 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
981 #else
982 fcntl (fd, F_SETFD, FD_CLOEXEC);
983 fcntl (fd, F_SETFL, O_NONBLOCK);
984 #endif
985 }
986
987 static void noinline
988 evpipe_init (EV_P)
989 {
990 if (!ev_is_active (&pipeev))
991 {
992 #if EV_USE_EVENTFD
993 if ((evfd = eventfd (0, 0)) >= 0)
994 {
995 evpipe [0] = -1;
996 fd_intern (evfd);
997 ev_io_set (&pipeev, evfd, EV_READ);
998 }
999 else
1000 #endif
1001 {
1002 while (pipe (evpipe))
1003 syserr ("(libev) error creating signal/async pipe");
1004
1005 fd_intern (evpipe [0]);
1006 fd_intern (evpipe [1]);
1007 ev_io_set (&pipeev, evpipe [0], EV_READ);
1008 }
1009
1010 ev_io_start (EV_A_ &pipeev);
1011 ev_unref (EV_A); /* watcher should not keep loop alive */
1012 }
1013 }
1014
1015 void inline_size
1016 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1017 {
1018 if (!*flag)
1019 {
1020 int old_errno = errno; /* save errno because write might clobber it */
1021
1022 *flag = 1;
1023
1024 #if EV_USE_EVENTFD
1025 if (evfd >= 0)
1026 {
1027 uint64_t counter = 1;
1028 write (evfd, &counter, sizeof (uint64_t));
1029 }
1030 else
1031 #endif
1032 write (evpipe [1], &old_errno, 1);
1033
1034 errno = old_errno;
1035 }
1036 }
1037
1038 static void
1039 pipecb (EV_P_ ev_io *iow, int revents)
1040 {
1041 #if EV_USE_EVENTFD
1042 if (evfd >= 0)
1043 {
1044 uint64_t counter;
1045 read (evfd, &counter, sizeof (uint64_t));
1046 }
1047 else
1048 #endif
1049 {
1050 char dummy;
1051 read (evpipe [0], &dummy, 1);
1052 }
1053
1054 if (gotsig && ev_is_default_loop (EV_A))
1055 {
1056 int signum;
1057 gotsig = 0;
1058
1059 for (signum = signalmax; signum--; )
1060 if (signals [signum].gotsig)
1061 ev_feed_signal_event (EV_A_ signum + 1);
1062 }
1063
1064 #if EV_ASYNC_ENABLE
1065 if (gotasync)
1066 {
1067 int i;
1068 gotasync = 0;
1069
1070 for (i = asynccnt; i--; )
1071 if (asyncs [i]->sent)
1072 {
1073 asyncs [i]->sent = 0;
1074 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1075 }
1076 }
1077 #endif
1078 }
1079
1080 /*****************************************************************************/
1081
1082 static void
1083 ev_sighandler (int signum)
1084 {
1085 #if EV_MULTIPLICITY
1086 struct ev_loop *loop = &default_loop_struct;
1087 #endif
1088
1089 #if _WIN32
1090 signal (signum, ev_sighandler);
1091 #endif
1092
1093 signals [signum - 1].gotsig = 1;
1094 evpipe_write (EV_A_ &gotsig);
1095 }
1096
1097 void noinline
1098 ev_feed_signal_event (EV_P_ int signum)
1099 {
1100 WL w;
1101
1102 #if EV_MULTIPLICITY
1103 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1104 #endif
1105
1106 --signum;
1107
1108 if (signum < 0 || signum >= signalmax)
1109 return;
1110
1111 signals [signum].gotsig = 0;
1112
1113 for (w = signals [signum].head; w; w = w->next)
1114 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1115 }
1116
1117 /*****************************************************************************/
1118
1119 static WL childs [EV_PID_HASHSIZE];
1120
1121 #ifndef _WIN32
1122
1123 static ev_signal childev;
1124
1125 #ifndef WIFCONTINUED
1126 # define WIFCONTINUED(status) 0
1127 #endif
1128
1129 void inline_speed
1130 child_reap (EV_P_ int chain, int pid, int status)
1131 {
1132 ev_child *w;
1133 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1134
1135 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1136 {
1137 if ((w->pid == pid || !w->pid)
1138 && (!traced || (w->flags & 1)))
1139 {
1140 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1141 w->rpid = pid;
1142 w->rstatus = status;
1143 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1144 }
1145 }
1146 }
1147
1148 #ifndef WCONTINUED
1149 # define WCONTINUED 0
1150 #endif
1151
1152 static void
1153 childcb (EV_P_ ev_signal *sw, int revents)
1154 {
1155 int pid, status;
1156
1157 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1158 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1159 if (!WCONTINUED
1160 || errno != EINVAL
1161 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1162 return;
1163
1164 /* make sure we are called again until all children have been reaped */
1165 /* we need to do it this way so that the callback gets called before we continue */
1166 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1167
1168 child_reap (EV_A_ pid, pid, status);
1169 if (EV_PID_HASHSIZE > 1)
1170 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1171 }
1172
1173 #endif
1174
1175 /*****************************************************************************/
1176
1177 #if EV_USE_PORT
1178 # include "ev_port.c"
1179 #endif
1180 #if EV_USE_KQUEUE
1181 # include "ev_kqueue.c"
1182 #endif
1183 #if EV_USE_EPOLL
1184 # include "ev_epoll.c"
1185 #endif
1186 #if EV_USE_POLL
1187 # include "ev_poll.c"
1188 #endif
1189 #if EV_USE_SELECT
1190 # include "ev_select.c"
1191 #endif
1192
1193 int
1194 ev_version_major (void)
1195 {
1196 return EV_VERSION_MAJOR;
1197 }
1198
1199 int
1200 ev_version_minor (void)
1201 {
1202 return EV_VERSION_MINOR;
1203 }
1204
1205 /* return true if we are running with elevated privileges and should ignore env variables */
1206 int inline_size
1207 enable_secure (void)
1208 {
1209 #ifdef _WIN32
1210 return 0;
1211 #else
1212 return getuid () != geteuid ()
1213 || getgid () != getegid ();
1214 #endif
1215 }
1216
1217 unsigned int
1218 ev_supported_backends (void)
1219 {
1220 unsigned int flags = 0;
1221
1222 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1223 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1224 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1225 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1226 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1227
1228 return flags;
1229 }
1230
1231 unsigned int
1232 ev_recommended_backends (void)
1233 {
1234 unsigned int flags = ev_supported_backends ();
1235
1236 #ifndef __NetBSD__
1237 /* kqueue is borked on everything but netbsd apparently */
1238 /* it usually doesn't work correctly on anything but sockets and pipes */
1239 flags &= ~EVBACKEND_KQUEUE;
1240 #endif
1241 #ifdef __APPLE__
1242 // flags &= ~EVBACKEND_KQUEUE; for documentation
1243 flags &= ~EVBACKEND_POLL;
1244 #endif
1245
1246 return flags;
1247 }
1248
1249 unsigned int
1250 ev_embeddable_backends (void)
1251 {
1252 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1253
1254 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1255 /* please fix it and tell me how to detect the fix */
1256 flags &= ~EVBACKEND_EPOLL;
1257
1258 return flags;
1259 }
1260
1261 unsigned int
1262 ev_backend (EV_P)
1263 {
1264 return backend;
1265 }
1266
1267 unsigned int
1268 ev_loop_count (EV_P)
1269 {
1270 return loop_count;
1271 }
1272
1273 void
1274 ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1275 {
1276 io_blocktime = interval;
1277 }
1278
1279 void
1280 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1281 {
1282 timeout_blocktime = interval;
1283 }
1284
1285 static void noinline
1286 loop_init (EV_P_ unsigned int flags)
1287 {
1288 if (!backend)
1289 {
1290 #if EV_USE_MONOTONIC
1291 {
1292 struct timespec ts;
1293 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1294 have_monotonic = 1;
1295 }
1296 #endif
1297
1298 ev_rt_now = ev_time ();
1299 mn_now = get_clock ();
1300 now_floor = mn_now;
1301 rtmn_diff = ev_rt_now - mn_now;
1302
1303 io_blocktime = 0.;
1304 timeout_blocktime = 0.;
1305 backend = 0;
1306 backend_fd = -1;
1307 gotasync = 0;
1308 #if EV_USE_INOTIFY
1309 fs_fd = -2;
1310 #endif
1311
1312 /* pid check not overridable via env */
1313 #ifndef _WIN32
1314 if (flags & EVFLAG_FORKCHECK)
1315 curpid = getpid ();
1316 #endif
1317
1318 if (!(flags & EVFLAG_NOENV)
1319 && !enable_secure ()
1320 && getenv ("LIBEV_FLAGS"))
1321 flags = atoi (getenv ("LIBEV_FLAGS"));
1322
1323 if (!(flags & 0x0000ffffU))
1324 flags |= ev_recommended_backends ();
1325
1326 #if EV_USE_PORT
1327 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1328 #endif
1329 #if EV_USE_KQUEUE
1330 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1331 #endif
1332 #if EV_USE_EPOLL
1333 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1334 #endif
1335 #if EV_USE_POLL
1336 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1337 #endif
1338 #if EV_USE_SELECT
1339 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1340 #endif
1341
1342 ev_init (&pipeev, pipecb);
1343 ev_set_priority (&pipeev, EV_MAXPRI);
1344 }
1345 }
1346
1347 static void noinline
1348 loop_destroy (EV_P)
1349 {
1350 int i;
1351
1352 if (ev_is_active (&pipeev))
1353 {
1354 ev_ref (EV_A); /* signal watcher */
1355 ev_io_stop (EV_A_ &pipeev);
1356
1357 #if EV_USE_EVENTFD
1358 if (evfd >= 0)
1359 close (evfd);
1360 #endif
1361
1362 if (evpipe [0] >= 0)
1363 {
1364 close (evpipe [0]);
1365 close (evpipe [1]);
1366 }
1367 }
1368
1369 #if EV_USE_INOTIFY
1370 if (fs_fd >= 0)
1371 close (fs_fd);
1372 #endif
1373
1374 if (backend_fd >= 0)
1375 close (backend_fd);
1376
1377 #if EV_USE_PORT
1378 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1379 #endif
1380 #if EV_USE_KQUEUE
1381 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1382 #endif
1383 #if EV_USE_EPOLL
1384 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1385 #endif
1386 #if EV_USE_POLL
1387 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1388 #endif
1389 #if EV_USE_SELECT
1390 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1391 #endif
1392
1393 for (i = NUMPRI; i--; )
1394 {
1395 array_free (pending, [i]);
1396 #if EV_IDLE_ENABLE
1397 array_free (idle, [i]);
1398 #endif
1399 }
1400
1401 ev_free (anfds); anfdmax = 0;
1402
1403 /* have to use the microsoft-never-gets-it-right macro */
1404 array_free (fdchange, EMPTY);
1405 array_free (timer, EMPTY);
1406 #if EV_PERIODIC_ENABLE
1407 array_free (periodic, EMPTY);
1408 #endif
1409 #if EV_FORK_ENABLE
1410 array_free (fork, EMPTY);
1411 #endif
1412 array_free (prepare, EMPTY);
1413 array_free (check, EMPTY);
1414 #if EV_ASYNC_ENABLE
1415 array_free (async, EMPTY);
1416 #endif
1417
1418 backend = 0;
1419 }
1420
1421 #if EV_USE_INOTIFY
1422 void inline_size infy_fork (EV_P);
1423 #endif
1424
1425 void inline_size
1426 loop_fork (EV_P)
1427 {
1428 #if EV_USE_PORT
1429 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1430 #endif
1431 #if EV_USE_KQUEUE
1432 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1433 #endif
1434 #if EV_USE_EPOLL
1435 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1436 #endif
1437 #if EV_USE_INOTIFY
1438 infy_fork (EV_A);
1439 #endif
1440
1441 if (ev_is_active (&pipeev))
1442 {
1443 /* this "locks" the handlers against writing to the pipe */
1444 /* while we modify the fd vars */
1445 gotsig = 1;
1446 #if EV_ASYNC_ENABLE
1447 gotasync = 1;
1448 #endif
1449
1450 ev_ref (EV_A);
1451 ev_io_stop (EV_A_ &pipeev);
1452
1453 #if EV_USE_EVENTFD
1454 if (evfd >= 0)
1455 close (evfd);
1456 #endif
1457
1458 if (evpipe [0] >= 0)
1459 {
1460 close (evpipe [0]);
1461 close (evpipe [1]);
1462 }
1463
1464 evpipe_init (EV_A);
1465 /* now iterate over everything, in case we missed something */
1466 pipecb (EV_A_ &pipeev, EV_READ);
1467 }
1468
1469 postfork = 0;
1470 }
1471
1472 #if EV_MULTIPLICITY
1473
1474 struct ev_loop *
1475 ev_loop_new (unsigned int flags)
1476 {
1477 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1478
1479 memset (loop, 0, sizeof (struct ev_loop));
1480
1481 loop_init (EV_A_ flags);
1482
1483 if (ev_backend (EV_A))
1484 return loop;
1485
1486 return 0;
1487 }
1488
1489 void
1490 ev_loop_destroy (EV_P)
1491 {
1492 loop_destroy (EV_A);
1493 ev_free (loop);
1494 }
1495
1496 void
1497 ev_loop_fork (EV_P)
1498 {
1499 postfork = 1; /* must be in line with ev_default_fork */
1500 }
1501
1502 #if EV_VERIFY
1503 static void noinline
1504 verify_watcher (EV_P_ W w)
1505 {
1506 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1507
1508 if (w->pending)
1509 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1510 }
1511
1512 static void noinline
1513 verify_heap (EV_P_ ANHE *heap, int N)
1514 {
1515 int i;
1516
1517 for (i = HEAP0; i < N + HEAP0; ++i)
1518 {
1519 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1520 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1521 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1522
1523 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1524 }
1525 }
1526
1527 static void noinline
1528 array_verify (EV_P_ W *ws, int cnt)
1529 {
1530 while (cnt--)
1531 {
1532 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1533 verify_watcher (EV_A_ ws [cnt]);
1534 }
1535 }
1536 #endif
1537
1538 void
1539 ev_loop_verify (EV_P)
1540 {
1541 #if EV_VERIFY
1542 int i;
1543 WL w;
1544
1545 assert (activecnt >= -1);
1546
1547 assert (fdchangemax >= fdchangecnt);
1548 for (i = 0; i < fdchangecnt; ++i)
1549 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1550
1551 assert (anfdmax >= 0);
1552 for (i = 0; i < anfdmax; ++i)
1553 for (w = anfds [i].head; w; w = w->next)
1554 {
1555 verify_watcher (EV_A_ (W)w);
1556 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1557 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1558 }
1559
1560 assert (timermax >= timercnt);
1561 verify_heap (EV_A_ timers, timercnt);
1562
1563 #if EV_PERIODIC_ENABLE
1564 assert (periodicmax >= periodiccnt);
1565 verify_heap (EV_A_ periodics, periodiccnt);
1566 #endif
1567
1568 for (i = NUMPRI; i--; )
1569 {
1570 assert (pendingmax [i] >= pendingcnt [i]);
1571 #if EV_IDLE_ENABLE
1572 assert (idleall >= 0);
1573 assert (idlemax [i] >= idlecnt [i]);
1574 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1575 #endif
1576 }
1577
1578 #if EV_FORK_ENABLE
1579 assert (forkmax >= forkcnt);
1580 array_verify (EV_A_ (W *)forks, forkcnt);
1581 #endif
1582
1583 #if EV_ASYNC_ENABLE
1584 assert (asyncmax >= asynccnt);
1585 array_verify (EV_A_ (W *)asyncs, asynccnt);
1586 #endif
1587
1588 assert (preparemax >= preparecnt);
1589 array_verify (EV_A_ (W *)prepares, preparecnt);
1590
1591 assert (checkmax >= checkcnt);
1592 array_verify (EV_A_ (W *)checks, checkcnt);
1593
1594 # if 0
1595 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1596 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1597 # endif
1598 #endif
1599 }
1600
1601 #endif /* multiplicity */
1602
1603 #if EV_MULTIPLICITY
1604 struct ev_loop *
1605 ev_default_loop_init (unsigned int flags)
1606 #else
1607 int
1608 ev_default_loop (unsigned int flags)
1609 #endif
1610 {
1611 if (!ev_default_loop_ptr)
1612 {
1613 #if EV_MULTIPLICITY
1614 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1615 #else
1616 ev_default_loop_ptr = 1;
1617 #endif
1618
1619 loop_init (EV_A_ flags);
1620
1621 if (ev_backend (EV_A))
1622 {
1623 #ifndef _WIN32
1624 ev_signal_init (&childev, childcb, SIGCHLD);
1625 ev_set_priority (&childev, EV_MAXPRI);
1626 ev_signal_start (EV_A_ &childev);
1627 ev_unref (EV_A); /* child watcher should not keep loop alive */
1628 #endif
1629 }
1630 else
1631 ev_default_loop_ptr = 0;
1632 }
1633
1634 return ev_default_loop_ptr;
1635 }
1636
1637 void
1638 ev_default_destroy (void)
1639 {
1640 #if EV_MULTIPLICITY
1641 struct ev_loop *loop = ev_default_loop_ptr;
1642 #endif
1643
1644 ev_default_loop_ptr = 0;
1645
1646 #ifndef _WIN32
1647 ev_ref (EV_A); /* child watcher */
1648 ev_signal_stop (EV_A_ &childev);
1649 #endif
1650
1651 loop_destroy (EV_A);
1652 }
1653
1654 void
1655 ev_default_fork (void)
1656 {
1657 #if EV_MULTIPLICITY
1658 struct ev_loop *loop = ev_default_loop_ptr;
1659 #endif
1660
1661 if (backend)
1662 postfork = 1; /* must be in line with ev_loop_fork */
1663 }
1664
1665 /*****************************************************************************/
1666
1667 void
1668 ev_invoke (EV_P_ void *w, int revents)
1669 {
1670 EV_CB_INVOKE ((W)w, revents);
1671 }
1672
1673 void inline_speed
1674 call_pending (EV_P)
1675 {
1676 int pri;
1677
1678 for (pri = NUMPRI; pri--; )
1679 while (pendingcnt [pri])
1680 {
1681 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1682
1683 if (expect_true (p->w))
1684 {
1685 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1686
1687 p->w->pending = 0;
1688 EV_CB_INVOKE (p->w, p->events);
1689 EV_FREQUENT_CHECK;
1690 }
1691 }
1692 }
1693
1694 #if EV_IDLE_ENABLE
1695 void inline_size
1696 idle_reify (EV_P)
1697 {
1698 if (expect_false (idleall))
1699 {
1700 int pri;
1701
1702 for (pri = NUMPRI; pri--; )
1703 {
1704 if (pendingcnt [pri])
1705 break;
1706
1707 if (idlecnt [pri])
1708 {
1709 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1710 break;
1711 }
1712 }
1713 }
1714 }
1715 #endif
1716
1717 void inline_size
1718 timers_reify (EV_P)
1719 {
1720 EV_FREQUENT_CHECK;
1721
1722 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1723 {
1724 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1725
1726 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1727
1728 /* first reschedule or stop timer */
1729 if (w->repeat)
1730 {
1731 ev_at (w) += w->repeat;
1732 if (ev_at (w) < mn_now)
1733 ev_at (w) = mn_now;
1734
1735 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1736
1737 ANHE_at_cache (timers [HEAP0]);
1738 downheap (timers, timercnt, HEAP0);
1739 }
1740 else
1741 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1742
1743 EV_FREQUENT_CHECK;
1744 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1745 }
1746 }
1747
1748 #if EV_PERIODIC_ENABLE
1749 void inline_size
1750 periodics_reify (EV_P)
1751 {
1752 EV_FREQUENT_CHECK;
1753
1754 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1755 {
1756 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1757
1758 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1759
1760 /* first reschedule or stop timer */
1761 if (w->reschedule_cb)
1762 {
1763 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1764
1765 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1766
1767 ANHE_at_cache (periodics [HEAP0]);
1768 downheap (periodics, periodiccnt, HEAP0);
1769 }
1770 else if (w->interval)
1771 {
1772 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1773 /* if next trigger time is not sufficiently in the future, put it there */
1774 /* this might happen because of floating point inexactness */
1775 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1776 {
1777 ev_at (w) += w->interval;
1778
1779 /* if interval is unreasonably low we might still have a time in the past */
1780 /* so correct this. this will make the periodic very inexact, but the user */
1781 /* has effectively asked to get triggered more often than possible */
1782 if (ev_at (w) < ev_rt_now)
1783 ev_at (w) = ev_rt_now;
1784 }
1785
1786 ANHE_at_cache (periodics [HEAP0]);
1787 downheap (periodics, periodiccnt, HEAP0);
1788 }
1789 else
1790 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1791
1792 EV_FREQUENT_CHECK;
1793 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1794 }
1795 }
1796
1797 static void noinline
1798 periodics_reschedule (EV_P)
1799 {
1800 int i;
1801
1802 /* adjust periodics after time jump */
1803 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1804 {
1805 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1806
1807 if (w->reschedule_cb)
1808 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1809 else if (w->interval)
1810 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1811
1812 ANHE_at_cache (periodics [i]);
1813 }
1814
1815 reheap (periodics, periodiccnt);
1816 }
1817 #endif
1818
1819 void inline_speed
1820 time_update (EV_P_ ev_tstamp max_block)
1821 {
1822 int i;
1823
1824 #if EV_USE_MONOTONIC
1825 if (expect_true (have_monotonic))
1826 {
1827 ev_tstamp odiff = rtmn_diff;
1828
1829 mn_now = get_clock ();
1830
1831 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1832 /* interpolate in the meantime */
1833 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1834 {
1835 ev_rt_now = rtmn_diff + mn_now;
1836 return;
1837 }
1838
1839 now_floor = mn_now;
1840 ev_rt_now = ev_time ();
1841
1842 /* loop a few times, before making important decisions.
1843 * on the choice of "4": one iteration isn't enough,
1844 * in case we get preempted during the calls to
1845 * ev_time and get_clock. a second call is almost guaranteed
1846 * to succeed in that case, though. and looping a few more times
1847 * doesn't hurt either as we only do this on time-jumps or
1848 * in the unlikely event of having been preempted here.
1849 */
1850 for (i = 4; --i; )
1851 {
1852 rtmn_diff = ev_rt_now - mn_now;
1853
1854 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1855 return; /* all is well */
1856
1857 ev_rt_now = ev_time ();
1858 mn_now = get_clock ();
1859 now_floor = mn_now;
1860 }
1861
1862 # if EV_PERIODIC_ENABLE
1863 periodics_reschedule (EV_A);
1864 # endif
1865 /* no timer adjustment, as the monotonic clock doesn't jump */
1866 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1867 }
1868 else
1869 #endif
1870 {
1871 ev_rt_now = ev_time ();
1872
1873 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1874 {
1875 #if EV_PERIODIC_ENABLE
1876 periodics_reschedule (EV_A);
1877 #endif
1878 /* adjust timers. this is easy, as the offset is the same for all of them */
1879 for (i = 0; i < timercnt; ++i)
1880 {
1881 ANHE *he = timers + i + HEAP0;
1882 ANHE_w (*he)->at += ev_rt_now - mn_now;
1883 ANHE_at_cache (*he);
1884 }
1885 }
1886
1887 mn_now = ev_rt_now;
1888 }
1889 }
1890
1891 void
1892 ev_ref (EV_P)
1893 {
1894 ++activecnt;
1895 }
1896
1897 void
1898 ev_unref (EV_P)
1899 {
1900 --activecnt;
1901 }
1902
1903 void
1904 ev_now_update (EV_P)
1905 {
1906 time_update (EV_A_ 1e100);
1907 }
1908
1909 static int loop_done;
1910
1911 void
1912 ev_loop (EV_P_ int flags)
1913 {
1914 loop_done = EVUNLOOP_CANCEL;
1915
1916 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1917
1918 do
1919 {
1920 #if EV_VERIFY >= 2
1921 ev_loop_verify (EV_A);
1922 #endif
1923
1924 #ifndef _WIN32
1925 if (expect_false (curpid)) /* penalise the forking check even more */
1926 if (expect_false (getpid () != curpid))
1927 {
1928 curpid = getpid ();
1929 postfork = 1;
1930 }
1931 #endif
1932
1933 #if EV_FORK_ENABLE
1934 /* we might have forked, so queue fork handlers */
1935 if (expect_false (postfork))
1936 if (forkcnt)
1937 {
1938 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1939 call_pending (EV_A);
1940 }
1941 #endif
1942
1943 /* queue prepare watchers (and execute them) */
1944 if (expect_false (preparecnt))
1945 {
1946 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1947 call_pending (EV_A);
1948 }
1949
1950 if (expect_false (!activecnt))
1951 break;
1952
1953 /* we might have forked, so reify kernel state if necessary */
1954 if (expect_false (postfork))
1955 loop_fork (EV_A);
1956
1957 /* update fd-related kernel structures */
1958 fd_reify (EV_A);
1959
1960 /* calculate blocking time */
1961 {
1962 ev_tstamp waittime = 0.;
1963 ev_tstamp sleeptime = 0.;
1964
1965 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1966 {
1967 /* update time to cancel out callback processing overhead */
1968 time_update (EV_A_ 1e100);
1969
1970 waittime = MAX_BLOCKTIME;
1971
1972 if (timercnt)
1973 {
1974 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1975 if (waittime > to) waittime = to;
1976 }
1977
1978 #if EV_PERIODIC_ENABLE
1979 if (periodiccnt)
1980 {
1981 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1982 if (waittime > to) waittime = to;
1983 }
1984 #endif
1985
1986 if (expect_false (waittime < timeout_blocktime))
1987 waittime = timeout_blocktime;
1988
1989 sleeptime = waittime - backend_fudge;
1990
1991 if (expect_true (sleeptime > io_blocktime))
1992 sleeptime = io_blocktime;
1993
1994 if (sleeptime)
1995 {
1996 ev_sleep (sleeptime);
1997 waittime -= sleeptime;
1998 }
1999 }
2000
2001 ++loop_count;
2002 backend_poll (EV_A_ waittime);
2003
2004 /* update ev_rt_now, do magic */
2005 time_update (EV_A_ waittime + sleeptime);
2006 }
2007
2008 /* queue pending timers and reschedule them */
2009 timers_reify (EV_A); /* relative timers called last */
2010 #if EV_PERIODIC_ENABLE
2011 periodics_reify (EV_A); /* absolute timers called first */
2012 #endif
2013
2014 #if EV_IDLE_ENABLE
2015 /* queue idle watchers unless other events are pending */
2016 idle_reify (EV_A);
2017 #endif
2018
2019 /* queue check watchers, to be executed first */
2020 if (expect_false (checkcnt))
2021 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2022
2023 call_pending (EV_A);
2024 }
2025 while (expect_true (
2026 activecnt
2027 && !loop_done
2028 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2029 ));
2030
2031 if (loop_done == EVUNLOOP_ONE)
2032 loop_done = EVUNLOOP_CANCEL;
2033 }
2034
2035 void
2036 ev_unloop (EV_P_ int how)
2037 {
2038 loop_done = how;
2039 }
2040
2041 /*****************************************************************************/
2042
2043 void inline_size
2044 wlist_add (WL *head, WL elem)
2045 {
2046 elem->next = *head;
2047 *head = elem;
2048 }
2049
2050 void inline_size
2051 wlist_del (WL *head, WL elem)
2052 {
2053 while (*head)
2054 {
2055 if (*head == elem)
2056 {
2057 *head = elem->next;
2058 return;
2059 }
2060
2061 head = &(*head)->next;
2062 }
2063 }
2064
2065 void inline_speed
2066 clear_pending (EV_P_ W w)
2067 {
2068 if (w->pending)
2069 {
2070 pendings [ABSPRI (w)][w->pending - 1].w = 0;
2071 w->pending = 0;
2072 }
2073 }
2074
2075 int
2076 ev_clear_pending (EV_P_ void *w)
2077 {
2078 W w_ = (W)w;
2079 int pending = w_->pending;
2080
2081 if (expect_true (pending))
2082 {
2083 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2084 w_->pending = 0;
2085 p->w = 0;
2086 return p->events;
2087 }
2088 else
2089 return 0;
2090 }
2091
2092 void inline_size
2093 pri_adjust (EV_P_ W w)
2094 {
2095 int pri = w->priority;
2096 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2097 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2098 w->priority = pri;
2099 }
2100
2101 void inline_speed
2102 ev_start (EV_P_ W w, int active)
2103 {
2104 pri_adjust (EV_A_ w);
2105 w->active = active;
2106 ev_ref (EV_A);
2107 }
2108
2109 void inline_size
2110 ev_stop (EV_P_ W w)
2111 {
2112 ev_unref (EV_A);
2113 w->active = 0;
2114 }
2115
2116 /*****************************************************************************/
2117
2118 void noinline
2119 ev_io_start (EV_P_ ev_io *w)
2120 {
2121 int fd = w->fd;
2122
2123 if (expect_false (ev_is_active (w)))
2124 return;
2125
2126 assert (("ev_io_start called with negative fd", fd >= 0));
2127 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2128
2129 EV_FREQUENT_CHECK;
2130
2131 ev_start (EV_A_ (W)w, 1);
2132 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2133 wlist_add (&anfds[fd].head, (WL)w);
2134
2135 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2136 w->events &= ~EV_IOFDSET;
2137
2138 EV_FREQUENT_CHECK;
2139 }
2140
2141 void noinline
2142 ev_io_stop (EV_P_ ev_io *w)
2143 {
2144 clear_pending (EV_A_ (W)w);
2145 if (expect_false (!ev_is_active (w)))
2146 return;
2147
2148 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2149
2150 EV_FREQUENT_CHECK;
2151
2152 wlist_del (&anfds[w->fd].head, (WL)w);
2153 ev_stop (EV_A_ (W)w);
2154
2155 fd_change (EV_A_ w->fd, 1);
2156
2157 EV_FREQUENT_CHECK;
2158 }
2159
2160 void noinline
2161 ev_timer_start (EV_P_ ev_timer *w)
2162 {
2163 if (expect_false (ev_is_active (w)))
2164 return;
2165
2166 ev_at (w) += mn_now;
2167
2168 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2169
2170 EV_FREQUENT_CHECK;
2171
2172 ++timercnt;
2173 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2174 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2175 ANHE_w (timers [ev_active (w)]) = (WT)w;
2176 ANHE_at_cache (timers [ev_active (w)]);
2177 upheap (timers, ev_active (w));
2178
2179 EV_FREQUENT_CHECK;
2180
2181 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2182 }
2183
2184 void noinline
2185 ev_timer_stop (EV_P_ ev_timer *w)
2186 {
2187 clear_pending (EV_A_ (W)w);
2188 if (expect_false (!ev_is_active (w)))
2189 return;
2190
2191 EV_FREQUENT_CHECK;
2192
2193 {
2194 int active = ev_active (w);
2195
2196 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2197
2198 --timercnt;
2199
2200 if (expect_true (active < timercnt + HEAP0))
2201 {
2202 timers [active] = timers [timercnt + HEAP0];
2203 adjustheap (timers, timercnt, active);
2204 }
2205 }
2206
2207 EV_FREQUENT_CHECK;
2208
2209 ev_at (w) -= mn_now;
2210
2211 ev_stop (EV_A_ (W)w);
2212 }
2213
2214 void noinline
2215 ev_timer_again (EV_P_ ev_timer *w)
2216 {
2217 EV_FREQUENT_CHECK;
2218
2219 if (ev_is_active (w))
2220 {
2221 if (w->repeat)
2222 {
2223 ev_at (w) = mn_now + w->repeat;
2224 ANHE_at_cache (timers [ev_active (w)]);
2225 adjustheap (timers, timercnt, ev_active (w));
2226 }
2227 else
2228 ev_timer_stop (EV_A_ w);
2229 }
2230 else if (w->repeat)
2231 {
2232 ev_at (w) = w->repeat;
2233 ev_timer_start (EV_A_ w);
2234 }
2235
2236 EV_FREQUENT_CHECK;
2237 }
2238
2239 #if EV_PERIODIC_ENABLE
2240 void noinline
2241 ev_periodic_start (EV_P_ ev_periodic *w)
2242 {
2243 if (expect_false (ev_is_active (w)))
2244 return;
2245
2246 if (w->reschedule_cb)
2247 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2248 else if (w->interval)
2249 {
2250 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
2251 /* this formula differs from the one in periodic_reify because we do not always round up */
2252 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2253 }
2254 else
2255 ev_at (w) = w->offset;
2256
2257 EV_FREQUENT_CHECK;
2258
2259 ++periodiccnt;
2260 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2261 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2262 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2263 ANHE_at_cache (periodics [ev_active (w)]);
2264 upheap (periodics, ev_active (w));
2265
2266 EV_FREQUENT_CHECK;
2267
2268 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2269 }
2270
2271 void noinline
2272 ev_periodic_stop (EV_P_ ev_periodic *w)
2273 {
2274 clear_pending (EV_A_ (W)w);
2275 if (expect_false (!ev_is_active (w)))
2276 return;
2277
2278 EV_FREQUENT_CHECK;
2279
2280 {
2281 int active = ev_active (w);
2282
2283 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2284
2285 --periodiccnt;
2286
2287 if (expect_true (active < periodiccnt + HEAP0))
2288 {
2289 periodics [active] = periodics [periodiccnt + HEAP0];
2290 adjustheap (periodics, periodiccnt, active);
2291 }
2292 }
2293
2294 EV_FREQUENT_CHECK;
2295
2296 ev_stop (EV_A_ (W)w);
2297 }
2298
2299 void noinline
2300 ev_periodic_again (EV_P_ ev_periodic *w)
2301 {
2302 /* TODO: use adjustheap and recalculation */
2303 ev_periodic_stop (EV_A_ w);
2304 ev_periodic_start (EV_A_ w);
2305 }
2306 #endif
2307
2308 #ifndef SA_RESTART
2309 # define SA_RESTART 0
2310 #endif
2311
2312 void noinline
2313 ev_signal_start (EV_P_ ev_signal *w)
2314 {
2315 #if EV_MULTIPLICITY
2316 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2317 #endif
2318 if (expect_false (ev_is_active (w)))
2319 return;
2320
2321 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2322
2323 evpipe_init (EV_A);
2324
2325 EV_FREQUENT_CHECK;
2326
2327 {
2328 #ifndef _WIN32
2329 sigset_t full, prev;
2330 sigfillset (&full);
2331 sigprocmask (SIG_SETMASK, &full, &prev);
2332 #endif
2333
2334 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2335
2336 #ifndef _WIN32
2337 sigprocmask (SIG_SETMASK, &prev, 0);
2338 #endif
2339 }
2340
2341 ev_start (EV_A_ (W)w, 1);
2342 wlist_add (&signals [w->signum - 1].head, (WL)w);
2343
2344 if (!((WL)w)->next)
2345 {
2346 #if _WIN32
2347 signal (w->signum, ev_sighandler);
2348 #else
2349 struct sigaction sa;
2350 sa.sa_handler = ev_sighandler;
2351 sigfillset (&sa.sa_mask);
2352 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2353 sigaction (w->signum, &sa, 0);
2354 #endif
2355 }
2356
2357 EV_FREQUENT_CHECK;
2358 }
2359
2360 void noinline
2361 ev_signal_stop (EV_P_ ev_signal *w)
2362 {
2363 clear_pending (EV_A_ (W)w);
2364 if (expect_false (!ev_is_active (w)))
2365 return;
2366
2367 EV_FREQUENT_CHECK;
2368
2369 wlist_del (&signals [w->signum - 1].head, (WL)w);
2370 ev_stop (EV_A_ (W)w);
2371
2372 if (!signals [w->signum - 1].head)
2373 signal (w->signum, SIG_DFL);
2374
2375 EV_FREQUENT_CHECK;
2376 }
2377
2378 void
2379 ev_child_start (EV_P_ ev_child *w)
2380 {
2381 #if EV_MULTIPLICITY
2382 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2383 #endif
2384 if (expect_false (ev_is_active (w)))
2385 return;
2386
2387 EV_FREQUENT_CHECK;
2388
2389 ev_start (EV_A_ (W)w, 1);
2390 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2391
2392 EV_FREQUENT_CHECK;
2393 }
2394
2395 void
2396 ev_child_stop (EV_P_ ev_child *w)
2397 {
2398 clear_pending (EV_A_ (W)w);
2399 if (expect_false (!ev_is_active (w)))
2400 return;
2401
2402 EV_FREQUENT_CHECK;
2403
2404 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2405 ev_stop (EV_A_ (W)w);
2406
2407 EV_FREQUENT_CHECK;
2408 }
2409
2410 #if EV_STAT_ENABLE
2411
2412 # ifdef _WIN32
2413 # undef lstat
2414 # define lstat(a,b) _stati64 (a,b)
2415 # endif
2416
2417 #define DEF_STAT_INTERVAL 5.0074891
2418 #define MIN_STAT_INTERVAL 0.1074891
2419
2420 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2421
2422 #if EV_USE_INOTIFY
2423 # define EV_INOTIFY_BUFSIZE 8192
2424
2425 static void noinline
2426 infy_add (EV_P_ ev_stat *w)
2427 {
2428 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);
2429
2430 if (w->wd < 0)
2431 {
2432 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2433
2434 /* monitor some parent directory for speedup hints */
2435 /* note that exceeding the hardcoded limit is not a correctness issue, */
2436 /* but an efficiency issue only */
2437 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2438 {
2439 char path [4096];
2440 strcpy (path, w->path);
2441
2442 do
2443 {
2444 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2445 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2446
2447 char *pend = strrchr (path, '/');
2448
2449 if (!pend)
2450 break; /* whoops, no '/', complain to your admin */
2451
2452 *pend = 0;
2453 w->wd = inotify_add_watch (fs_fd, path, mask);
2454 }
2455 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2456 }
2457 }
2458 else
2459 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2460
2461 if (w->wd >= 0)
2462 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2463 }
2464
2465 static void noinline
2466 infy_del (EV_P_ ev_stat *w)
2467 {
2468 int slot;
2469 int wd = w->wd;
2470
2471 if (wd < 0)
2472 return;
2473
2474 w->wd = -2;
2475 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2476 wlist_del (&fs_hash [slot].head, (WL)w);
2477
2478 /* remove this watcher, if others are watching it, they will rearm */
2479 inotify_rm_watch (fs_fd, wd);
2480 }
2481
2482 static void noinline
2483 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2484 {
2485 if (slot < 0)
2486 /* overflow, need to check for all hash slots */
2487 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2488 infy_wd (EV_A_ slot, wd, ev);
2489 else
2490 {
2491 WL w_;
2492
2493 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2494 {
2495 ev_stat *w = (ev_stat *)w_;
2496 w_ = w_->next; /* lets us remove this watcher and all before it */
2497
2498 if (w->wd == wd || wd == -1)
2499 {
2500 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2501 {
2502 w->wd = -1;
2503 infy_add (EV_A_ w); /* re-add, no matter what */
2504 }
2505
2506 stat_timer_cb (EV_A_ &w->timer, 0);
2507 }
2508 }
2509 }
2510 }
2511
2512 static void
2513 infy_cb (EV_P_ ev_io *w, int revents)
2514 {
2515 char buf [EV_INOTIFY_BUFSIZE];
2516 struct inotify_event *ev = (struct inotify_event *)buf;
2517 int ofs;
2518 int len = read (fs_fd, buf, sizeof (buf));
2519
2520 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2521 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2522 }
2523
2524 void inline_size
2525 infy_init (EV_P)
2526 {
2527 if (fs_fd != -2)
2528 return;
2529
2530 /* kernels < 2.6.25 are borked
2531 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2532 */
2533 {
2534 struct utsname buf;
2535 int major, minor, micro;
2536
2537 fs_fd = -1;
2538
2539 if (uname (&buf))
2540 return;
2541
2542 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2543 return;
2544
2545 if (major < 2
2546 || (major == 2 && minor < 6)
2547 || (major == 2 && minor == 6 && micro < 25))
2548 return;
2549 }
2550
2551 fs_fd = inotify_init ();
2552
2553 if (fs_fd >= 0)
2554 {
2555 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2556 ev_set_priority (&fs_w, EV_MAXPRI);
2557 ev_io_start (EV_A_ &fs_w);
2558 }
2559 }
2560
2561 void inline_size
2562 infy_fork (EV_P)
2563 {
2564 int slot;
2565
2566 if (fs_fd < 0)
2567 return;
2568
2569 close (fs_fd);
2570 fs_fd = inotify_init ();
2571
2572 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2573 {
2574 WL w_ = fs_hash [slot].head;
2575 fs_hash [slot].head = 0;
2576
2577 while (w_)
2578 {
2579 ev_stat *w = (ev_stat *)w_;
2580 w_ = w_->next; /* lets us add this watcher */
2581
2582 w->wd = -1;
2583
2584 if (fs_fd >= 0)
2585 infy_add (EV_A_ w); /* re-add, no matter what */
2586 else
2587 ev_timer_start (EV_A_ &w->timer);
2588 }
2589 }
2590 }
2591
2592 #endif
2593
2594 #ifdef _WIN32
2595 # define EV_LSTAT(p,b) _stati64 (p, b)
2596 #else
2597 # define EV_LSTAT(p,b) lstat (p, b)
2598 #endif
2599
2600 void
2601 ev_stat_stat (EV_P_ ev_stat *w)
2602 {
2603 if (lstat (w->path, &w->attr) < 0)
2604 w->attr.st_nlink = 0;
2605 else if (!w->attr.st_nlink)
2606 w->attr.st_nlink = 1;
2607 }
2608
2609 static void noinline
2610 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2611 {
2612 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2613
2614 /* we copy this here each the time so that */
2615 /* prev has the old value when the callback gets invoked */
2616 w->prev = w->attr;
2617 ev_stat_stat (EV_A_ w);
2618
2619 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2620 if (
2621 w->prev.st_dev != w->attr.st_dev
2622 || w->prev.st_ino != w->attr.st_ino
2623 || w->prev.st_mode != w->attr.st_mode
2624 || w->prev.st_nlink != w->attr.st_nlink
2625 || w->prev.st_uid != w->attr.st_uid
2626 || w->prev.st_gid != w->attr.st_gid
2627 || w->prev.st_rdev != w->attr.st_rdev
2628 || w->prev.st_size != w->attr.st_size
2629 || w->prev.st_atime != w->attr.st_atime
2630 || w->prev.st_mtime != w->attr.st_mtime
2631 || w->prev.st_ctime != w->attr.st_ctime
2632 ) {
2633 #if EV_USE_INOTIFY
2634 if (fs_fd >= 0)
2635 {
2636 infy_del (EV_A_ w);
2637 infy_add (EV_A_ w);
2638 ev_stat_stat (EV_A_ w); /* avoid race... */
2639 }
2640 #endif
2641
2642 ev_feed_event (EV_A_ w, EV_STAT);
2643 }
2644 }
2645
2646 void
2647 ev_stat_start (EV_P_ ev_stat *w)
2648 {
2649 if (expect_false (ev_is_active (w)))
2650 return;
2651
2652 /* since we use memcmp, we need to clear any padding data etc. */
2653 memset (&w->prev, 0, sizeof (ev_statdata));
2654 memset (&w->attr, 0, sizeof (ev_statdata));
2655
2656 ev_stat_stat (EV_A_ w);
2657
2658 if (w->interval < MIN_STAT_INTERVAL)
2659 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2660
2661 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2662 ev_set_priority (&w->timer, ev_priority (w));
2663
2664 #if EV_USE_INOTIFY
2665 infy_init (EV_A);
2666
2667 if (fs_fd >= 0)
2668 infy_add (EV_A_ w);
2669 else
2670 #endif
2671 ev_timer_start (EV_A_ &w->timer);
2672
2673 ev_start (EV_A_ (W)w, 1);
2674
2675 EV_FREQUENT_CHECK;
2676 }
2677
2678 void
2679 ev_stat_stop (EV_P_ ev_stat *w)
2680 {
2681 clear_pending (EV_A_ (W)w);
2682 if (expect_false (!ev_is_active (w)))
2683 return;
2684
2685 EV_FREQUENT_CHECK;
2686
2687 #if EV_USE_INOTIFY
2688 infy_del (EV_A_ w);
2689 #endif
2690 ev_timer_stop (EV_A_ &w->timer);
2691
2692 ev_stop (EV_A_ (W)w);
2693
2694 EV_FREQUENT_CHECK;
2695 }
2696 #endif
2697
2698 #if EV_IDLE_ENABLE
2699 void
2700 ev_idle_start (EV_P_ ev_idle *w)
2701 {
2702 if (expect_false (ev_is_active (w)))
2703 return;
2704
2705 pri_adjust (EV_A_ (W)w);
2706
2707 EV_FREQUENT_CHECK;
2708
2709 {
2710 int active = ++idlecnt [ABSPRI (w)];
2711
2712 ++idleall;
2713 ev_start (EV_A_ (W)w, active);
2714
2715 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2716 idles [ABSPRI (w)][active - 1] = w;
2717 }
2718
2719 EV_FREQUENT_CHECK;
2720 }
2721
2722 void
2723 ev_idle_stop (EV_P_ ev_idle *w)
2724 {
2725 clear_pending (EV_A_ (W)w);
2726 if (expect_false (!ev_is_active (w)))
2727 return;
2728
2729 EV_FREQUENT_CHECK;
2730
2731 {
2732 int active = ev_active (w);
2733
2734 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2735 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2736
2737 ev_stop (EV_A_ (W)w);
2738 --idleall;
2739 }
2740
2741 EV_FREQUENT_CHECK;
2742 }
2743 #endif
2744
2745 void
2746 ev_prepare_start (EV_P_ ev_prepare *w)
2747 {
2748 if (expect_false (ev_is_active (w)))
2749 return;
2750
2751 EV_FREQUENT_CHECK;
2752
2753 ev_start (EV_A_ (W)w, ++preparecnt);
2754 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2755 prepares [preparecnt - 1] = w;
2756
2757 EV_FREQUENT_CHECK;
2758 }
2759
2760 void
2761 ev_prepare_stop (EV_P_ ev_prepare *w)
2762 {
2763 clear_pending (EV_A_ (W)w);
2764 if (expect_false (!ev_is_active (w)))
2765 return;
2766
2767 EV_FREQUENT_CHECK;
2768
2769 {
2770 int active = ev_active (w);
2771
2772 prepares [active - 1] = prepares [--preparecnt];
2773 ev_active (prepares [active - 1]) = active;
2774 }
2775
2776 ev_stop (EV_A_ (W)w);
2777
2778 EV_FREQUENT_CHECK;
2779 }
2780
2781 void
2782 ev_check_start (EV_P_ ev_check *w)
2783 {
2784 if (expect_false (ev_is_active (w)))
2785 return;
2786
2787 EV_FREQUENT_CHECK;
2788
2789 ev_start (EV_A_ (W)w, ++checkcnt);
2790 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2791 checks [checkcnt - 1] = w;
2792
2793 EV_FREQUENT_CHECK;
2794 }
2795
2796 void
2797 ev_check_stop (EV_P_ ev_check *w)
2798 {
2799 clear_pending (EV_A_ (W)w);
2800 if (expect_false (!ev_is_active (w)))
2801 return;
2802
2803 EV_FREQUENT_CHECK;
2804
2805 {
2806 int active = ev_active (w);
2807
2808 checks [active - 1] = checks [--checkcnt];
2809 ev_active (checks [active - 1]) = active;
2810 }
2811
2812 ev_stop (EV_A_ (W)w);
2813
2814 EV_FREQUENT_CHECK;
2815 }
2816
2817 #if EV_EMBED_ENABLE
2818 void noinline
2819 ev_embed_sweep (EV_P_ ev_embed *w)
2820 {
2821 ev_loop (w->other, EVLOOP_NONBLOCK);
2822 }
2823
2824 static void
2825 embed_io_cb (EV_P_ ev_io *io, int revents)
2826 {
2827 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2828
2829 if (ev_cb (w))
2830 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2831 else
2832 ev_loop (w->other, EVLOOP_NONBLOCK);
2833 }
2834
2835 static void
2836 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2837 {
2838 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2839
2840 {
2841 struct ev_loop *loop = w->other;
2842
2843 while (fdchangecnt)
2844 {
2845 fd_reify (EV_A);
2846 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2847 }
2848 }
2849 }
2850
2851 static void
2852 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2853 {
2854 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2855
2856 {
2857 struct ev_loop *loop = w->other;
2858
2859 ev_loop_fork (EV_A);
2860 }
2861 }
2862
2863 #if 0
2864 static void
2865 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2866 {
2867 ev_idle_stop (EV_A_ idle);
2868 }
2869 #endif
2870
2871 void
2872 ev_embed_start (EV_P_ ev_embed *w)
2873 {
2874 if (expect_false (ev_is_active (w)))
2875 return;
2876
2877 {
2878 struct ev_loop *loop = w->other;
2879 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2880 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2881 }
2882
2883 EV_FREQUENT_CHECK;
2884
2885 ev_set_priority (&w->io, ev_priority (w));
2886 ev_io_start (EV_A_ &w->io);
2887
2888 ev_prepare_init (&w->prepare, embed_prepare_cb);
2889 ev_set_priority (&w->prepare, EV_MINPRI);
2890 ev_prepare_start (EV_A_ &w->prepare);
2891
2892 ev_fork_init (&w->fork, embed_fork_cb);
2893 ev_fork_start (EV_A_ &w->fork);
2894
2895 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2896
2897 ev_start (EV_A_ (W)w, 1);
2898
2899 EV_FREQUENT_CHECK;
2900 }
2901
2902 void
2903 ev_embed_stop (EV_P_ ev_embed *w)
2904 {
2905 clear_pending (EV_A_ (W)w);
2906 if (expect_false (!ev_is_active (w)))
2907 return;
2908
2909 EV_FREQUENT_CHECK;
2910
2911 ev_io_stop (EV_A_ &w->io);
2912 ev_prepare_stop (EV_A_ &w->prepare);
2913 ev_fork_stop (EV_A_ &w->fork);
2914
2915 EV_FREQUENT_CHECK;
2916 }
2917 #endif
2918
2919 #if EV_FORK_ENABLE
2920 void
2921 ev_fork_start (EV_P_ ev_fork *w)
2922 {
2923 if (expect_false (ev_is_active (w)))
2924 return;
2925
2926 EV_FREQUENT_CHECK;
2927
2928 ev_start (EV_A_ (W)w, ++forkcnt);
2929 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2930 forks [forkcnt - 1] = w;
2931
2932 EV_FREQUENT_CHECK;
2933 }
2934
2935 void
2936 ev_fork_stop (EV_P_ ev_fork *w)
2937 {
2938 clear_pending (EV_A_ (W)w);
2939 if (expect_false (!ev_is_active (w)))
2940 return;
2941
2942 EV_FREQUENT_CHECK;
2943
2944 {
2945 int active = ev_active (w);
2946
2947 forks [active - 1] = forks [--forkcnt];
2948 ev_active (forks [active - 1]) = active;
2949 }
2950
2951 ev_stop (EV_A_ (W)w);
2952
2953 EV_FREQUENT_CHECK;
2954 }
2955 #endif
2956
2957 #if EV_ASYNC_ENABLE
2958 void
2959 ev_async_start (EV_P_ ev_async *w)
2960 {
2961 if (expect_false (ev_is_active (w)))
2962 return;
2963
2964 evpipe_init (EV_A);
2965
2966 EV_FREQUENT_CHECK;
2967
2968 ev_start (EV_A_ (W)w, ++asynccnt);
2969 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2970 asyncs [asynccnt - 1] = w;
2971
2972 EV_FREQUENT_CHECK;
2973 }
2974
2975 void
2976 ev_async_stop (EV_P_ ev_async *w)
2977 {
2978 clear_pending (EV_A_ (W)w);
2979 if (expect_false (!ev_is_active (w)))
2980 return;
2981
2982 EV_FREQUENT_CHECK;
2983
2984 {
2985 int active = ev_active (w);
2986
2987 asyncs [active - 1] = asyncs [--asynccnt];
2988 ev_active (asyncs [active - 1]) = active;
2989 }
2990
2991 ev_stop (EV_A_ (W)w);
2992
2993 EV_FREQUENT_CHECK;
2994 }
2995
2996 void
2997 ev_async_send (EV_P_ ev_async *w)
2998 {
2999 w->sent = 1;
3000 evpipe_write (EV_A_ &gotasync);
3001 }
3002 #endif
3003
3004 /*****************************************************************************/
3005
3006 struct ev_once
3007 {
3008 ev_io io;
3009 ev_timer to;
3010 void (*cb)(int revents, void *arg);
3011 void *arg;
3012 };
3013
3014 static void
3015 once_cb (EV_P_ struct ev_once *once, int revents)
3016 {
3017 void (*cb)(int revents, void *arg) = once->cb;
3018 void *arg = once->arg;
3019
3020 ev_io_stop (EV_A_ &once->io);
3021 ev_timer_stop (EV_A_ &once->to);
3022 ev_free (once);
3023
3024 cb (revents, arg);
3025 }
3026
3027 static void
3028 once_cb_io (EV_P_ ev_io *w, int revents)
3029 {
3030 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3031
3032 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3033 }
3034
3035 static void
3036 once_cb_to (EV_P_ ev_timer *w, int revents)
3037 {
3038 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3039
3040 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3041 }
3042
3043 void
3044 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3045 {
3046 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3047
3048 if (expect_false (!once))
3049 {
3050 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3051 return;
3052 }
3053
3054 once->cb = cb;
3055 once->arg = arg;
3056
3057 ev_init (&once->io, once_cb_io);
3058 if (fd >= 0)
3059 {
3060 ev_io_set (&once->io, fd, events);
3061 ev_io_start (EV_A_ &once->io);
3062 }
3063
3064 ev_init (&once->to, once_cb_to);
3065 if (timeout >= 0.)
3066 {
3067 ev_timer_set (&once->to, timeout, 0.);
3068 ev_timer_start (EV_A_ &once->to);
3069 }
3070 }
3071
3072 #if EV_MULTIPLICITY
3073 #include "ev_wrap.h"
3074 #endif
3075
3076 #ifdef __cplusplus
3077 }
3078 #endif
3079