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Revision: 1.118
Committed: Fri Nov 16 01:33:54 2007 UTC (16 years, 6 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.117: +24 -4 lines
Log Message:
add solaris port backend

File Contents

# Content
1 /*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met:
10 *
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * * Redistributions in binary form must reproduce the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer in the documentation and/or other materials provided
17 * with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35
36 #ifndef EV_STANDALONE
37 # include "config.h"
38
39 # if HAVE_CLOCK_GETTIME
40 # ifndef EV_USE_MONOTONIC
41 # define EV_USE_MONOTONIC 1
42 # endif
43 # ifndef EV_USE_REALTIME
44 # define EV_USE_REALTIME 1
45 # endif
46 # endif
47
48 # if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)
49 # define EV_USE_SELECT 1
50 # endif
51
52 # if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)
53 # define EV_USE_POLL 1
54 # endif
55
56 # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)
57 # define EV_USE_EPOLL 1
58 # endif
59
60 # if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)
61 # define EV_USE_KQUEUE 1
62 # endif
63
64 # if HAVE_PORT_H && HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT)
65 # define EV_USE_PORT 1
66 # endif
67
68 #endif
69
70 #include <math.h>
71 #include <stdlib.h>
72 #include <fcntl.h>
73 #include <stddef.h>
74
75 #include <stdio.h>
76
77 #include <assert.h>
78 #include <errno.h>
79 #include <sys/types.h>
80 #include <time.h>
81
82 #include <signal.h>
83
84 #ifndef _WIN32
85 # include <unistd.h>
86 # include <sys/time.h>
87 # include <sys/wait.h>
88 #else
89 # define WIN32_LEAN_AND_MEAN
90 # include <windows.h>
91 # ifndef EV_SELECT_IS_WINSOCKET
92 # define EV_SELECT_IS_WINSOCKET 1
93 # endif
94 #endif
95
96 /**/
97
98 #ifndef EV_USE_MONOTONIC
99 # define EV_USE_MONOTONIC 1
100 #endif
101
102 #ifndef EV_USE_REALTIME
103 # define EV_USE_REALTIME 1
104 #endif
105
106 #ifndef EV_USE_SELECT
107 # define EV_USE_SELECT 1
108 # define EV_SELECT_USE_FD_SET 1
109 #endif
110
111 #ifndef EV_USE_POLL
112 # ifdef _WIN32
113 # define EV_USE_POLL 0
114 # else
115 # define EV_USE_POLL 1
116 # endif
117 #endif
118
119 #ifndef EV_USE_EPOLL
120 # define EV_USE_EPOLL 0
121 #endif
122
123 #ifndef EV_USE_KQUEUE
124 # define EV_USE_KQUEUE 0
125 #endif
126
127 #ifndef EV_USE_PORT
128 # define EV_USE_PORT 0
129 #endif
130
131 /**/
132
133 /* darwin simply cannot be helped */
134 #ifdef __APPLE__
135 # undef EV_USE_POLL
136 # undef EV_USE_KQUEUE
137 #endif
138
139 #ifndef CLOCK_MONOTONIC
140 # undef EV_USE_MONOTONIC
141 # define EV_USE_MONOTONIC 0
142 #endif
143
144 #ifndef CLOCK_REALTIME
145 # undef EV_USE_REALTIME
146 # define EV_USE_REALTIME 0
147 #endif
148
149 #if EV_SELECT_IS_WINSOCKET
150 # include <winsock.h>
151 #endif
152
153 /**/
154
155 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
156 #define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
157 #define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
158 /*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
159
160 #ifdef EV_H
161 # include EV_H
162 #else
163 # include "ev.h"
164 #endif
165
166 #if __GNUC__ >= 3
167 # define expect(expr,value) __builtin_expect ((expr),(value))
168 # define inline inline
169 #else
170 # define expect(expr,value) (expr)
171 # define inline static
172 #endif
173
174 #define expect_false(expr) expect ((expr) != 0, 0)
175 #define expect_true(expr) expect ((expr) != 0, 1)
176
177 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
178 #define ABSPRI(w) ((w)->priority - EV_MINPRI)
179
180 #define EMPTY0 /* required for microsofts broken pseudo-c compiler */
181 #define EMPTY2(a,b) /* used to suppress some warnings */
182
183 typedef struct ev_watcher *W;
184 typedef struct ev_watcher_list *WL;
185 typedef struct ev_watcher_time *WT;
186
187 static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
188
189 #ifdef _WIN32
190 # include "ev_win32.c"
191 #endif
192
193 /*****************************************************************************/
194
195 static void (*syserr_cb)(const char *msg);
196
197 void ev_set_syserr_cb (void (*cb)(const char *msg))
198 {
199 syserr_cb = cb;
200 }
201
202 static void
203 syserr (const char *msg)
204 {
205 if (!msg)
206 msg = "(libev) system error";
207
208 if (syserr_cb)
209 syserr_cb (msg);
210 else
211 {
212 perror (msg);
213 abort ();
214 }
215 }
216
217 static void *(*alloc)(void *ptr, long size);
218
219 void ev_set_allocator (void *(*cb)(void *ptr, long size))
220 {
221 alloc = cb;
222 }
223
224 static void *
225 ev_realloc (void *ptr, long size)
226 {
227 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
228
229 if (!ptr && size)
230 {
231 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
232 abort ();
233 }
234
235 return ptr;
236 }
237
238 #define ev_malloc(size) ev_realloc (0, (size))
239 #define ev_free(ptr) ev_realloc ((ptr), 0)
240
241 /*****************************************************************************/
242
243 typedef struct
244 {
245 WL head;
246 unsigned char events;
247 unsigned char reify;
248 #if EV_SELECT_IS_WINSOCKET
249 SOCKET handle;
250 #endif
251 } ANFD;
252
253 typedef struct
254 {
255 W w;
256 int events;
257 } ANPENDING;
258
259 #if EV_MULTIPLICITY
260
261 struct ev_loop
262 {
263 ev_tstamp ev_rt_now;
264 #define ev_rt_now ((loop)->ev_rt_now)
265 #define VAR(name,decl) decl;
266 #include "ev_vars.h"
267 #undef VAR
268 };
269 #include "ev_wrap.h"
270
271 static struct ev_loop default_loop_struct;
272 struct ev_loop *ev_default_loop_ptr;
273
274 #else
275
276 ev_tstamp ev_rt_now;
277 #define VAR(name,decl) static decl;
278 #include "ev_vars.h"
279 #undef VAR
280
281 static int ev_default_loop_ptr;
282
283 #endif
284
285 /*****************************************************************************/
286
287 ev_tstamp
288 ev_time (void)
289 {
290 #if EV_USE_REALTIME
291 struct timespec ts;
292 clock_gettime (CLOCK_REALTIME, &ts);
293 return ts.tv_sec + ts.tv_nsec * 1e-9;
294 #else
295 struct timeval tv;
296 gettimeofday (&tv, 0);
297 return tv.tv_sec + tv.tv_usec * 1e-6;
298 #endif
299 }
300
301 inline ev_tstamp
302 get_clock (void)
303 {
304 #if EV_USE_MONOTONIC
305 if (expect_true (have_monotonic))
306 {
307 struct timespec ts;
308 clock_gettime (CLOCK_MONOTONIC, &ts);
309 return ts.tv_sec + ts.tv_nsec * 1e-9;
310 }
311 #endif
312
313 return ev_time ();
314 }
315
316 #if EV_MULTIPLICITY
317 ev_tstamp
318 ev_now (EV_P)
319 {
320 return ev_rt_now;
321 }
322 #endif
323
324 #define array_roundsize(type,n) (((n) | 4) & ~3)
325
326 #define array_needsize(type,base,cur,cnt,init) \
327 if (expect_false ((cnt) > cur)) \
328 { \
329 int newcnt = cur; \
330 do \
331 { \
332 newcnt = array_roundsize (type, newcnt << 1); \
333 } \
334 while ((cnt) > newcnt); \
335 \
336 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
337 init (base + cur, newcnt - cur); \
338 cur = newcnt; \
339 }
340
341 #define array_slim(type,stem) \
342 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
343 { \
344 stem ## max = array_roundsize (stem ## cnt >> 1); \
345 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
346 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
347 }
348
349 #define array_free(stem, idx) \
350 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
351
352 /*****************************************************************************/
353
354 static void
355 anfds_init (ANFD *base, int count)
356 {
357 while (count--)
358 {
359 base->head = 0;
360 base->events = EV_NONE;
361 base->reify = 0;
362
363 ++base;
364 }
365 }
366
367 void
368 ev_feed_event (EV_P_ void *w, int revents)
369 {
370 W w_ = (W)w;
371
372 if (w_->pending)
373 {
374 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
375 return;
376 }
377
378 w_->pending = ++pendingcnt [ABSPRI (w_)];
379 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
380 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
381 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
382 }
383
384 static void
385 queue_events (EV_P_ W *events, int eventcnt, int type)
386 {
387 int i;
388
389 for (i = 0; i < eventcnt; ++i)
390 ev_feed_event (EV_A_ events [i], type);
391 }
392
393 inline void
394 fd_event (EV_P_ int fd, int revents)
395 {
396 ANFD *anfd = anfds + fd;
397 struct ev_io *w;
398
399 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
400 {
401 int ev = w->events & revents;
402
403 if (ev)
404 ev_feed_event (EV_A_ (W)w, ev);
405 }
406 }
407
408 void
409 ev_feed_fd_event (EV_P_ int fd, int revents)
410 {
411 fd_event (EV_A_ fd, revents);
412 }
413
414 /*****************************************************************************/
415
416 static void
417 fd_reify (EV_P)
418 {
419 int i;
420
421 for (i = 0; i < fdchangecnt; ++i)
422 {
423 int fd = fdchanges [i];
424 ANFD *anfd = anfds + fd;
425 struct ev_io *w;
426
427 int events = 0;
428
429 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
430 events |= w->events;
431
432 #if EV_SELECT_IS_WINSOCKET
433 if (events)
434 {
435 unsigned long argp;
436 anfd->handle = _get_osfhandle (fd);
437 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
438 }
439 #endif
440
441 anfd->reify = 0;
442
443 method_modify (EV_A_ fd, anfd->events, events);
444 anfd->events = events;
445 }
446
447 fdchangecnt = 0;
448 }
449
450 static void
451 fd_change (EV_P_ int fd)
452 {
453 if (anfds [fd].reify)
454 return;
455
456 anfds [fd].reify = 1;
457
458 ++fdchangecnt;
459 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
460 fdchanges [fdchangecnt - 1] = fd;
461 }
462
463 static void
464 fd_kill (EV_P_ int fd)
465 {
466 struct ev_io *w;
467
468 while ((w = (struct ev_io *)anfds [fd].head))
469 {
470 ev_io_stop (EV_A_ w);
471 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
472 }
473 }
474
475 static int
476 fd_valid (int fd)
477 {
478 #ifdef _WIN32
479 return _get_osfhandle (fd) != -1;
480 #else
481 return fcntl (fd, F_GETFD) != -1;
482 #endif
483 }
484
485 /* called on EBADF to verify fds */
486 static void
487 fd_ebadf (EV_P)
488 {
489 int fd;
490
491 for (fd = 0; fd < anfdmax; ++fd)
492 if (anfds [fd].events)
493 if (!fd_valid (fd) == -1 && errno == EBADF)
494 fd_kill (EV_A_ fd);
495 }
496
497 /* called on ENOMEM in select/poll to kill some fds and retry */
498 static void
499 fd_enomem (EV_P)
500 {
501 int fd;
502
503 for (fd = anfdmax; fd--; )
504 if (anfds [fd].events)
505 {
506 fd_kill (EV_A_ fd);
507 return;
508 }
509 }
510
511 /* usually called after fork if method needs to re-arm all fds from scratch */
512 static void
513 fd_rearm_all (EV_P)
514 {
515 int fd;
516
517 /* this should be highly optimised to not do anything but set a flag */
518 for (fd = 0; fd < anfdmax; ++fd)
519 if (anfds [fd].events)
520 {
521 anfds [fd].events = 0;
522 fd_change (EV_A_ fd);
523 }
524 }
525
526 /*****************************************************************************/
527
528 static void
529 upheap (WT *heap, int k)
530 {
531 WT w = heap [k];
532
533 while (k && heap [k >> 1]->at > w->at)
534 {
535 heap [k] = heap [k >> 1];
536 ((W)heap [k])->active = k + 1;
537 k >>= 1;
538 }
539
540 heap [k] = w;
541 ((W)heap [k])->active = k + 1;
542
543 }
544
545 static void
546 downheap (WT *heap, int N, int k)
547 {
548 WT w = heap [k];
549
550 while (k < (N >> 1))
551 {
552 int j = k << 1;
553
554 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
555 ++j;
556
557 if (w->at <= heap [j]->at)
558 break;
559
560 heap [k] = heap [j];
561 ((W)heap [k])->active = k + 1;
562 k = j;
563 }
564
565 heap [k] = w;
566 ((W)heap [k])->active = k + 1;
567 }
568
569 inline void
570 adjustheap (WT *heap, int N, int k)
571 {
572 upheap (heap, k);
573 downheap (heap, N, k);
574 }
575
576 /*****************************************************************************/
577
578 typedef struct
579 {
580 WL head;
581 sig_atomic_t volatile gotsig;
582 } ANSIG;
583
584 static ANSIG *signals;
585 static int signalmax;
586
587 static int sigpipe [2];
588 static sig_atomic_t volatile gotsig;
589 static struct ev_io sigev;
590
591 static void
592 signals_init (ANSIG *base, int count)
593 {
594 while (count--)
595 {
596 base->head = 0;
597 base->gotsig = 0;
598
599 ++base;
600 }
601 }
602
603 static void
604 sighandler (int signum)
605 {
606 #if _WIN32
607 signal (signum, sighandler);
608 #endif
609
610 signals [signum - 1].gotsig = 1;
611
612 if (!gotsig)
613 {
614 int old_errno = errno;
615 gotsig = 1;
616 write (sigpipe [1], &signum, 1);
617 errno = old_errno;
618 }
619 }
620
621 void
622 ev_feed_signal_event (EV_P_ int signum)
623 {
624 WL w;
625
626 #if EV_MULTIPLICITY
627 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
628 #endif
629
630 --signum;
631
632 if (signum < 0 || signum >= signalmax)
633 return;
634
635 signals [signum].gotsig = 0;
636
637 for (w = signals [signum].head; w; w = w->next)
638 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
639 }
640
641 static void
642 sigcb (EV_P_ struct ev_io *iow, int revents)
643 {
644 int signum;
645
646 read (sigpipe [0], &revents, 1);
647 gotsig = 0;
648
649 for (signum = signalmax; signum--; )
650 if (signals [signum].gotsig)
651 ev_feed_signal_event (EV_A_ signum + 1);
652 }
653
654 inline void
655 fd_intern (int fd)
656 {
657 #ifdef _WIN32
658 int arg = 1;
659 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
660 #else
661 fcntl (fd, F_SETFD, FD_CLOEXEC);
662 fcntl (fd, F_SETFL, O_NONBLOCK);
663 #endif
664 }
665
666 static void
667 siginit (EV_P)
668 {
669 fd_intern (sigpipe [0]);
670 fd_intern (sigpipe [1]);
671
672 ev_io_set (&sigev, sigpipe [0], EV_READ);
673 ev_io_start (EV_A_ &sigev);
674 ev_unref (EV_A); /* child watcher should not keep loop alive */
675 }
676
677 /*****************************************************************************/
678
679 static struct ev_child *childs [PID_HASHSIZE];
680
681 #ifndef _WIN32
682
683 static struct ev_signal childev;
684
685 #ifndef WCONTINUED
686 # define WCONTINUED 0
687 #endif
688
689 static void
690 child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
691 {
692 struct ev_child *w;
693
694 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
695 if (w->pid == pid || !w->pid)
696 {
697 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
698 w->rpid = pid;
699 w->rstatus = status;
700 ev_feed_event (EV_A_ (W)w, EV_CHILD);
701 }
702 }
703
704 static void
705 childcb (EV_P_ struct ev_signal *sw, int revents)
706 {
707 int pid, status;
708
709 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
710 {
711 /* make sure we are called again until all childs have been reaped */
712 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
713
714 child_reap (EV_A_ sw, pid, pid, status);
715 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
716 }
717 }
718
719 #endif
720
721 /*****************************************************************************/
722
723 #if EV_USE_PORT
724 # include "ev_port.c"
725 #endif
726 #if EV_USE_KQUEUE
727 # include "ev_kqueue.c"
728 #endif
729 #if EV_USE_EPOLL
730 # include "ev_epoll.c"
731 #endif
732 #if EV_USE_POLL
733 # include "ev_poll.c"
734 #endif
735 #if EV_USE_SELECT
736 # include "ev_select.c"
737 #endif
738
739 int
740 ev_version_major (void)
741 {
742 return EV_VERSION_MAJOR;
743 }
744
745 int
746 ev_version_minor (void)
747 {
748 return EV_VERSION_MINOR;
749 }
750
751 /* return true if we are running with elevated privileges and should ignore env variables */
752 static int
753 enable_secure (void)
754 {
755 #ifdef _WIN32
756 return 0;
757 #else
758 return getuid () != geteuid ()
759 || getgid () != getegid ();
760 #endif
761 }
762
763 unsigned int
764 ev_method (EV_P)
765 {
766 return method;
767 }
768
769 static void
770 loop_init (EV_P_ unsigned int flags)
771 {
772 if (!method)
773 {
774 #if EV_USE_MONOTONIC
775 {
776 struct timespec ts;
777 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
778 have_monotonic = 1;
779 }
780 #endif
781
782 ev_rt_now = ev_time ();
783 mn_now = get_clock ();
784 now_floor = mn_now;
785 rtmn_diff = ev_rt_now - mn_now;
786
787 if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
788 flags = atoi (getenv ("LIBEV_FLAGS"));
789
790 if (!(flags & 0x0000ffff))
791 flags |= 0x0000ffff;
792
793 method = 0;
794 #if EV_USE_PORT
795 if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);
796 #endif
797 #if EV_USE_KQUEUE
798 if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
799 #endif
800 #if EV_USE_EPOLL
801 if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
802 #endif
803 #if EV_USE_POLL
804 if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
805 #endif
806 #if EV_USE_SELECT
807 if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
808 #endif
809
810 ev_init (&sigev, sigcb);
811 ev_set_priority (&sigev, EV_MAXPRI);
812 }
813 }
814
815 void
816 loop_destroy (EV_P)
817 {
818 int i;
819
820 #if EV_USE_PORT
821 if (method == EVMETHOD_PORT ) port_destroy (EV_A);
822 #endif
823 #if EV_USE_KQUEUE
824 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
825 #endif
826 #if EV_USE_EPOLL
827 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
828 #endif
829 #if EV_USE_POLL
830 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
831 #endif
832 #if EV_USE_SELECT
833 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
834 #endif
835
836 for (i = NUMPRI; i--; )
837 array_free (pending, [i]);
838
839 /* have to use the microsoft-never-gets-it-right macro */
840 array_free (fdchange, EMPTY0);
841 array_free (timer, EMPTY0);
842 #if EV_PERIODICS
843 array_free (periodic, EMPTY0);
844 #endif
845 array_free (idle, EMPTY0);
846 array_free (prepare, EMPTY0);
847 array_free (check, EMPTY0);
848
849 method = 0;
850 }
851
852 static void
853 loop_fork (EV_P)
854 {
855 #if EV_USE_PORT
856 if (method == EVMETHOD_PORT ) port_fork (EV_A);
857 #endif
858 #if EV_USE_KQUEUE
859 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
860 #endif
861 #if EV_USE_EPOLL
862 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
863 #endif
864
865 if (ev_is_active (&sigev))
866 {
867 /* default loop */
868
869 ev_ref (EV_A);
870 ev_io_stop (EV_A_ &sigev);
871 close (sigpipe [0]);
872 close (sigpipe [1]);
873
874 while (pipe (sigpipe))
875 syserr ("(libev) error creating pipe");
876
877 siginit (EV_A);
878 }
879
880 postfork = 0;
881 }
882
883 #if EV_MULTIPLICITY
884 struct ev_loop *
885 ev_loop_new (unsigned int flags)
886 {
887 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
888
889 memset (loop, 0, sizeof (struct ev_loop));
890
891 loop_init (EV_A_ flags);
892
893 if (ev_method (EV_A))
894 return loop;
895
896 return 0;
897 }
898
899 void
900 ev_loop_destroy (EV_P)
901 {
902 loop_destroy (EV_A);
903 ev_free (loop);
904 }
905
906 void
907 ev_loop_fork (EV_P)
908 {
909 postfork = 1;
910 }
911
912 #endif
913
914 #if EV_MULTIPLICITY
915 struct ev_loop *
916 ev_default_loop_ (unsigned int flags)
917 #else
918 int
919 ev_default_loop (unsigned int flags)
920 #endif
921 {
922 if (sigpipe [0] == sigpipe [1])
923 if (pipe (sigpipe))
924 return 0;
925
926 if (!ev_default_loop_ptr)
927 {
928 #if EV_MULTIPLICITY
929 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
930 #else
931 ev_default_loop_ptr = 1;
932 #endif
933
934 loop_init (EV_A_ flags);
935
936 if (ev_method (EV_A))
937 {
938 siginit (EV_A);
939
940 #ifndef _WIN32
941 ev_signal_init (&childev, childcb, SIGCHLD);
942 ev_set_priority (&childev, EV_MAXPRI);
943 ev_signal_start (EV_A_ &childev);
944 ev_unref (EV_A); /* child watcher should not keep loop alive */
945 #endif
946 }
947 else
948 ev_default_loop_ptr = 0;
949 }
950
951 return ev_default_loop_ptr;
952 }
953
954 void
955 ev_default_destroy (void)
956 {
957 #if EV_MULTIPLICITY
958 struct ev_loop *loop = ev_default_loop_ptr;
959 #endif
960
961 #ifndef _WIN32
962 ev_ref (EV_A); /* child watcher */
963 ev_signal_stop (EV_A_ &childev);
964 #endif
965
966 ev_ref (EV_A); /* signal watcher */
967 ev_io_stop (EV_A_ &sigev);
968
969 close (sigpipe [0]); sigpipe [0] = 0;
970 close (sigpipe [1]); sigpipe [1] = 0;
971
972 loop_destroy (EV_A);
973 }
974
975 void
976 ev_default_fork (void)
977 {
978 #if EV_MULTIPLICITY
979 struct ev_loop *loop = ev_default_loop_ptr;
980 #endif
981
982 if (method)
983 postfork = 1;
984 }
985
986 /*****************************************************************************/
987
988 static int
989 any_pending (EV_P)
990 {
991 int pri;
992
993 for (pri = NUMPRI; pri--; )
994 if (pendingcnt [pri])
995 return 1;
996
997 return 0;
998 }
999
1000 static void
1001 call_pending (EV_P)
1002 {
1003 int pri;
1004
1005 for (pri = NUMPRI; pri--; )
1006 while (pendingcnt [pri])
1007 {
1008 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1009
1010 if (p->w)
1011 {
1012 p->w->pending = 0;
1013 EV_CB_INVOKE (p->w, p->events);
1014 }
1015 }
1016 }
1017
1018 static void
1019 timers_reify (EV_P)
1020 {
1021 while (timercnt && ((WT)timers [0])->at <= mn_now)
1022 {
1023 struct ev_timer *w = timers [0];
1024
1025 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1026
1027 /* first reschedule or stop timer */
1028 if (w->repeat)
1029 {
1030 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1031
1032 ((WT)w)->at += w->repeat;
1033 if (((WT)w)->at < mn_now)
1034 ((WT)w)->at = mn_now;
1035
1036 downheap ((WT *)timers, timercnt, 0);
1037 }
1038 else
1039 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1040
1041 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1042 }
1043 }
1044
1045 #if EV_PERIODICS
1046 static void
1047 periodics_reify (EV_P)
1048 {
1049 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1050 {
1051 struct ev_periodic *w = periodics [0];
1052
1053 assert (("inactive timer on periodic heap detected", ev_is_active (w)));
1054
1055 /* first reschedule or stop timer */
1056 if (w->reschedule_cb)
1057 {
1058 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1059 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1060 downheap ((WT *)periodics, periodiccnt, 0);
1061 }
1062 else if (w->interval)
1063 {
1064 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1065 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1066 downheap ((WT *)periodics, periodiccnt, 0);
1067 }
1068 else
1069 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1070
1071 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1072 }
1073 }
1074
1075 static void
1076 periodics_reschedule (EV_P)
1077 {
1078 int i;
1079
1080 /* adjust periodics after time jump */
1081 for (i = 0; i < periodiccnt; ++i)
1082 {
1083 struct ev_periodic *w = periodics [i];
1084
1085 if (w->reschedule_cb)
1086 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1087 else if (w->interval)
1088 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1089 }
1090
1091 /* now rebuild the heap */
1092 for (i = periodiccnt >> 1; i--; )
1093 downheap ((WT *)periodics, periodiccnt, i);
1094 }
1095 #endif
1096
1097 inline int
1098 time_update_monotonic (EV_P)
1099 {
1100 mn_now = get_clock ();
1101
1102 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1103 {
1104 ev_rt_now = rtmn_diff + mn_now;
1105 return 0;
1106 }
1107 else
1108 {
1109 now_floor = mn_now;
1110 ev_rt_now = ev_time ();
1111 return 1;
1112 }
1113 }
1114
1115 static void
1116 time_update (EV_P)
1117 {
1118 int i;
1119
1120 #if EV_USE_MONOTONIC
1121 if (expect_true (have_monotonic))
1122 {
1123 if (time_update_monotonic (EV_A))
1124 {
1125 ev_tstamp odiff = rtmn_diff;
1126
1127 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1128 {
1129 rtmn_diff = ev_rt_now - mn_now;
1130
1131 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1132 return; /* all is well */
1133
1134 ev_rt_now = ev_time ();
1135 mn_now = get_clock ();
1136 now_floor = mn_now;
1137 }
1138
1139 # if EV_PERIODICS
1140 periodics_reschedule (EV_A);
1141 # endif
1142 /* no timer adjustment, as the monotonic clock doesn't jump */
1143 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1144 }
1145 }
1146 else
1147 #endif
1148 {
1149 ev_rt_now = ev_time ();
1150
1151 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1152 {
1153 #if EV_PERIODICS
1154 periodics_reschedule (EV_A);
1155 #endif
1156
1157 /* adjust timers. this is easy, as the offset is the same for all */
1158 for (i = 0; i < timercnt; ++i)
1159 ((WT)timers [i])->at += ev_rt_now - mn_now;
1160 }
1161
1162 mn_now = ev_rt_now;
1163 }
1164 }
1165
1166 void
1167 ev_ref (EV_P)
1168 {
1169 ++activecnt;
1170 }
1171
1172 void
1173 ev_unref (EV_P)
1174 {
1175 --activecnt;
1176 }
1177
1178 static int loop_done;
1179
1180 void
1181 ev_loop (EV_P_ int flags)
1182 {
1183 double block;
1184 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
1185
1186 while (activecnt)
1187 {
1188 /* queue check watchers (and execute them) */
1189 if (expect_false (preparecnt))
1190 {
1191 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1192 call_pending (EV_A);
1193 }
1194
1195 /* we might have forked, so reify kernel state if necessary */
1196 if (expect_false (postfork))
1197 loop_fork (EV_A);
1198
1199 /* update fd-related kernel structures */
1200 fd_reify (EV_A);
1201
1202 /* calculate blocking time */
1203
1204 /* we only need this for !monotonic clock or timers, but as we basically
1205 always have timers, we just calculate it always */
1206 #if EV_USE_MONOTONIC
1207 if (expect_true (have_monotonic))
1208 time_update_monotonic (EV_A);
1209 else
1210 #endif
1211 {
1212 ev_rt_now = ev_time ();
1213 mn_now = ev_rt_now;
1214 }
1215
1216 if (flags & EVLOOP_NONBLOCK || idlecnt)
1217 block = 0.;
1218 else
1219 {
1220 block = MAX_BLOCKTIME;
1221
1222 if (timercnt)
1223 {
1224 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
1225 if (block > to) block = to;
1226 }
1227
1228 #if EV_PERIODICS
1229 if (periodiccnt)
1230 {
1231 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
1232 if (block > to) block = to;
1233 }
1234 #endif
1235
1236 if (block < 0.) block = 0.;
1237 }
1238
1239 method_poll (EV_A_ block);
1240
1241 /* update ev_rt_now, do magic */
1242 time_update (EV_A);
1243
1244 /* queue pending timers and reschedule them */
1245 timers_reify (EV_A); /* relative timers called last */
1246 #if EV_PERIODICS
1247 periodics_reify (EV_A); /* absolute timers called first */
1248 #endif
1249
1250 /* queue idle watchers unless io or timers are pending */
1251 if (idlecnt && !any_pending (EV_A))
1252 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
1253
1254 /* queue check watchers, to be executed first */
1255 if (checkcnt)
1256 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1257
1258 call_pending (EV_A);
1259
1260 if (loop_done)
1261 break;
1262 }
1263
1264 if (loop_done != 2)
1265 loop_done = 0;
1266 }
1267
1268 void
1269 ev_unloop (EV_P_ int how)
1270 {
1271 loop_done = how;
1272 }
1273
1274 /*****************************************************************************/
1275
1276 inline void
1277 wlist_add (WL *head, WL elem)
1278 {
1279 elem->next = *head;
1280 *head = elem;
1281 }
1282
1283 inline void
1284 wlist_del (WL *head, WL elem)
1285 {
1286 while (*head)
1287 {
1288 if (*head == elem)
1289 {
1290 *head = elem->next;
1291 return;
1292 }
1293
1294 head = &(*head)->next;
1295 }
1296 }
1297
1298 inline void
1299 ev_clear_pending (EV_P_ W w)
1300 {
1301 if (w->pending)
1302 {
1303 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1304 w->pending = 0;
1305 }
1306 }
1307
1308 inline void
1309 ev_start (EV_P_ W w, int active)
1310 {
1311 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
1312 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1313
1314 w->active = active;
1315 ev_ref (EV_A);
1316 }
1317
1318 inline void
1319 ev_stop (EV_P_ W w)
1320 {
1321 ev_unref (EV_A);
1322 w->active = 0;
1323 }
1324
1325 /*****************************************************************************/
1326
1327 void
1328 ev_io_start (EV_P_ struct ev_io *w)
1329 {
1330 int fd = w->fd;
1331
1332 if (ev_is_active (w))
1333 return;
1334
1335 assert (("ev_io_start called with negative fd", fd >= 0));
1336
1337 ev_start (EV_A_ (W)w, 1);
1338 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1339 wlist_add ((WL *)&anfds[fd].head, (WL)w);
1340
1341 fd_change (EV_A_ fd);
1342 }
1343
1344 void
1345 ev_io_stop (EV_P_ struct ev_io *w)
1346 {
1347 ev_clear_pending (EV_A_ (W)w);
1348 if (!ev_is_active (w))
1349 return;
1350
1351 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1352
1353 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1354 ev_stop (EV_A_ (W)w);
1355
1356 fd_change (EV_A_ w->fd);
1357 }
1358
1359 void
1360 ev_timer_start (EV_P_ struct ev_timer *w)
1361 {
1362 if (ev_is_active (w))
1363 return;
1364
1365 ((WT)w)->at += mn_now;
1366
1367 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1368
1369 ev_start (EV_A_ (W)w, ++timercnt);
1370 array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
1371 timers [timercnt - 1] = w;
1372 upheap ((WT *)timers, timercnt - 1);
1373
1374 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1375 }
1376
1377 void
1378 ev_timer_stop (EV_P_ struct ev_timer *w)
1379 {
1380 ev_clear_pending (EV_A_ (W)w);
1381 if (!ev_is_active (w))
1382 return;
1383
1384 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1385
1386 if (((W)w)->active < timercnt--)
1387 {
1388 timers [((W)w)->active - 1] = timers [timercnt];
1389 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1390 }
1391
1392 ((WT)w)->at -= mn_now;
1393
1394 ev_stop (EV_A_ (W)w);
1395 }
1396
1397 void
1398 ev_timer_again (EV_P_ struct ev_timer *w)
1399 {
1400 if (ev_is_active (w))
1401 {
1402 if (w->repeat)
1403 {
1404 ((WT)w)->at = mn_now + w->repeat;
1405 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1406 }
1407 else
1408 ev_timer_stop (EV_A_ w);
1409 }
1410 else if (w->repeat)
1411 {
1412 w->at = w->repeat;
1413 ev_timer_start (EV_A_ w);
1414 }
1415 }
1416
1417 #if EV_PERIODICS
1418 void
1419 ev_periodic_start (EV_P_ struct ev_periodic *w)
1420 {
1421 if (ev_is_active (w))
1422 return;
1423
1424 if (w->reschedule_cb)
1425 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1426 else if (w->interval)
1427 {
1428 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1429 /* this formula differs from the one in periodic_reify because we do not always round up */
1430 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1431 }
1432
1433 ev_start (EV_A_ (W)w, ++periodiccnt);
1434 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1435 periodics [periodiccnt - 1] = w;
1436 upheap ((WT *)periodics, periodiccnt - 1);
1437
1438 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1439 }
1440
1441 void
1442 ev_periodic_stop (EV_P_ struct ev_periodic *w)
1443 {
1444 ev_clear_pending (EV_A_ (W)w);
1445 if (!ev_is_active (w))
1446 return;
1447
1448 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1449
1450 if (((W)w)->active < periodiccnt--)
1451 {
1452 periodics [((W)w)->active - 1] = periodics [periodiccnt];
1453 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1454 }
1455
1456 ev_stop (EV_A_ (W)w);
1457 }
1458
1459 void
1460 ev_periodic_again (EV_P_ struct ev_periodic *w)
1461 {
1462 /* TODO: use adjustheap and recalculation */
1463 ev_periodic_stop (EV_A_ w);
1464 ev_periodic_start (EV_A_ w);
1465 }
1466 #endif
1467
1468 void
1469 ev_idle_start (EV_P_ struct ev_idle *w)
1470 {
1471 if (ev_is_active (w))
1472 return;
1473
1474 ev_start (EV_A_ (W)w, ++idlecnt);
1475 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1476 idles [idlecnt - 1] = w;
1477 }
1478
1479 void
1480 ev_idle_stop (EV_P_ struct ev_idle *w)
1481 {
1482 ev_clear_pending (EV_A_ (W)w);
1483 if (!ev_is_active (w))
1484 return;
1485
1486 idles [((W)w)->active - 1] = idles [--idlecnt];
1487 ev_stop (EV_A_ (W)w);
1488 }
1489
1490 void
1491 ev_prepare_start (EV_P_ struct ev_prepare *w)
1492 {
1493 if (ev_is_active (w))
1494 return;
1495
1496 ev_start (EV_A_ (W)w, ++preparecnt);
1497 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1498 prepares [preparecnt - 1] = w;
1499 }
1500
1501 void
1502 ev_prepare_stop (EV_P_ struct ev_prepare *w)
1503 {
1504 ev_clear_pending (EV_A_ (W)w);
1505 if (!ev_is_active (w))
1506 return;
1507
1508 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1509 ev_stop (EV_A_ (W)w);
1510 }
1511
1512 void
1513 ev_check_start (EV_P_ struct ev_check *w)
1514 {
1515 if (ev_is_active (w))
1516 return;
1517
1518 ev_start (EV_A_ (W)w, ++checkcnt);
1519 array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1520 checks [checkcnt - 1] = w;
1521 }
1522
1523 void
1524 ev_check_stop (EV_P_ struct ev_check *w)
1525 {
1526 ev_clear_pending (EV_A_ (W)w);
1527 if (!ev_is_active (w))
1528 return;
1529
1530 checks [((W)w)->active - 1] = checks [--checkcnt];
1531 ev_stop (EV_A_ (W)w);
1532 }
1533
1534 #ifndef SA_RESTART
1535 # define SA_RESTART 0
1536 #endif
1537
1538 void
1539 ev_signal_start (EV_P_ struct ev_signal *w)
1540 {
1541 #if EV_MULTIPLICITY
1542 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1543 #endif
1544 if (ev_is_active (w))
1545 return;
1546
1547 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1548
1549 ev_start (EV_A_ (W)w, 1);
1550 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1551 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1552
1553 if (!((WL)w)->next)
1554 {
1555 #if _WIN32
1556 signal (w->signum, sighandler);
1557 #else
1558 struct sigaction sa;
1559 sa.sa_handler = sighandler;
1560 sigfillset (&sa.sa_mask);
1561 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1562 sigaction (w->signum, &sa, 0);
1563 #endif
1564 }
1565 }
1566
1567 void
1568 ev_signal_stop (EV_P_ struct ev_signal *w)
1569 {
1570 ev_clear_pending (EV_A_ (W)w);
1571 if (!ev_is_active (w))
1572 return;
1573
1574 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1575 ev_stop (EV_A_ (W)w);
1576
1577 if (!signals [w->signum - 1].head)
1578 signal (w->signum, SIG_DFL);
1579 }
1580
1581 void
1582 ev_child_start (EV_P_ struct ev_child *w)
1583 {
1584 #if EV_MULTIPLICITY
1585 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1586 #endif
1587 if (ev_is_active (w))
1588 return;
1589
1590 ev_start (EV_A_ (W)w, 1);
1591 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1592 }
1593
1594 void
1595 ev_child_stop (EV_P_ struct ev_child *w)
1596 {
1597 ev_clear_pending (EV_A_ (W)w);
1598 if (!ev_is_active (w))
1599 return;
1600
1601 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1602 ev_stop (EV_A_ (W)w);
1603 }
1604
1605 /*****************************************************************************/
1606
1607 struct ev_once
1608 {
1609 struct ev_io io;
1610 struct ev_timer to;
1611 void (*cb)(int revents, void *arg);
1612 void *arg;
1613 };
1614
1615 static void
1616 once_cb (EV_P_ struct ev_once *once, int revents)
1617 {
1618 void (*cb)(int revents, void *arg) = once->cb;
1619 void *arg = once->arg;
1620
1621 ev_io_stop (EV_A_ &once->io);
1622 ev_timer_stop (EV_A_ &once->to);
1623 ev_free (once);
1624
1625 cb (revents, arg);
1626 }
1627
1628 static void
1629 once_cb_io (EV_P_ struct ev_io *w, int revents)
1630 {
1631 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1632 }
1633
1634 static void
1635 once_cb_to (EV_P_ struct ev_timer *w, int revents)
1636 {
1637 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1638 }
1639
1640 void
1641 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1642 {
1643 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1644
1645 if (!once)
1646 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1647 else
1648 {
1649 once->cb = cb;
1650 once->arg = arg;
1651
1652 ev_init (&once->io, once_cb_io);
1653 if (fd >= 0)
1654 {
1655 ev_io_set (&once->io, fd, events);
1656 ev_io_start (EV_A_ &once->io);
1657 }
1658
1659 ev_init (&once->to, once_cb_to);
1660 if (timeout >= 0.)
1661 {
1662 ev_timer_set (&once->to, timeout, 0.);
1663 ev_timer_start (EV_A_ &once->to);
1664 }
1665 }
1666 }
1667
1668 #ifdef __cplusplus
1669 }
1670 #endif
1671