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Comparing libev/ev.c (file contents):
Revision 1.178 by root, Tue Dec 11 18:36:11 2007 UTC vs.
Revision 1.225 by root, Wed Apr 16 01:37:14 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * 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.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
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 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 46# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 47# include EV_CONFIG_H
39# else 48# else
40# include "config.h" 49# include "config.h"
51# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 61# define EV_USE_MONOTONIC 0
53# endif 62# endif
54# ifndef EV_USE_REALTIME 63# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 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
56# endif 73# endif
57# endif 74# endif
58 75
59# ifndef EV_USE_SELECT 76# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 77# if HAVE_SELECT && HAVE_SYS_SELECT_H
102# else 119# else
103# define EV_USE_INOTIFY 0 120# define EV_USE_INOTIFY 0
104# endif 121# endif
105# endif 122# endif
106 123
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
107#endif 132#endif
108 133
109#include <math.h> 134#include <math.h>
110#include <stdlib.h> 135#include <stdlib.h>
111#include <fcntl.h> 136#include <fcntl.h>
136# ifndef EV_SELECT_IS_WINSOCKET 161# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 162# define EV_SELECT_IS_WINSOCKET 1
138# endif 163# endif
139#endif 164#endif
140 165
141/**/ 166/* this block tries to deduce configuration from header-defined symbols and defaults */
142 167
143#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
144# define EV_USE_MONOTONIC 0 169# define EV_USE_MONOTONIC 0
145#endif 170#endif
146 171
147#ifndef EV_USE_REALTIME 172#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
149#endif 178#endif
150 179
151#ifndef EV_USE_SELECT 180#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 181# define EV_USE_SELECT 1
153#endif 182#endif
159# define EV_USE_POLL 1 188# define EV_USE_POLL 1
160# endif 189# endif
161#endif 190#endif
162 191
163#ifndef EV_USE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
164# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
165#endif 198#endif
166 199
167#ifndef EV_USE_KQUEUE 200#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 201# define EV_USE_KQUEUE 0
169#endif 202#endif
171#ifndef EV_USE_PORT 204#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 205# define EV_USE_PORT 0
173#endif 206#endif
174 207
175#ifndef EV_USE_INOTIFY 208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
176# define EV_USE_INOTIFY 0 212# define EV_USE_INOTIFY 0
213# endif
177#endif 214#endif
178 215
179#ifndef EV_PID_HASHSIZE 216#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 217# if EV_MINIMAL
181# define EV_PID_HASHSIZE 1 218# define EV_PID_HASHSIZE 1
190# else 227# else
191# define EV_INOTIFY_HASHSIZE 16 228# define EV_INOTIFY_HASHSIZE 16
192# endif 229# endif
193#endif 230#endif
194 231
195/**/ 232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196 241
197#ifndef CLOCK_MONOTONIC 242#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 243# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 244# define EV_USE_MONOTONIC 0
200#endif 245#endif
202#ifndef CLOCK_REALTIME 247#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 248# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 249# define EV_USE_REALTIME 0
205#endif 250#endif
206 251
252#if !EV_STAT_ENABLE
253# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0
255#endif
256
257#if !EV_USE_NANOSLEEP
258# ifndef _WIN32
259# include <sys/select.h>
260# endif
261#endif
262
263#if EV_USE_INOTIFY
264# include <sys/inotify.h>
265#endif
266
207#if EV_SELECT_IS_WINSOCKET 267#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 268# include <winsock.h>
209#endif 269#endif
210 270
211#if !EV_STAT_ENABLE 271#if EV_USE_EVENTFD
212# define EV_USE_INOTIFY 0 272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h>
274# ifdef __cplusplus
275extern "C" {
213#endif 276# endif
214 277int eventfd (unsigned int initval, int flags);
215#if EV_USE_INOTIFY 278# ifdef __cplusplus
216# include <sys/inotify.h> 279}
280# endif
217#endif 281#endif
218 282
219/**/ 283/**/
220 284
221/* 285/*
230 294
231#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 295#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
232#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
233/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */ 297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
234 298
235#if __GNUC__ >= 3 299#if __GNUC__ >= 4
236# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
237# define noinline __attribute__ ((noinline)) 301# define noinline __attribute__ ((noinline))
238#else 302#else
239# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
240# define noinline 304# define noinline
241# if __STDC_VERSION__ < 199901L 305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
242# define inline 306# define inline
243# endif 307# endif
244#endif 308#endif
245 309
246#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
261 325
262typedef ev_watcher *W; 326typedef ev_watcher *W;
263typedef ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
264typedef ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
265 329
330#if EV_USE_MONOTONIC
331/* sig_atomic_t is used to avoid per-thread variables or locking but still */
332/* giving it a reasonably high chance of working on typical architetcures */
266static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 333static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
334#endif
267 335
268#ifdef _WIN32 336#ifdef _WIN32
269# include "ev_win32.c" 337# include "ev_win32.c"
270#endif 338#endif
271 339
292 perror (msg); 360 perror (msg);
293 abort (); 361 abort ();
294 } 362 }
295} 363}
296 364
365static void *
366ev_realloc_emul (void *ptr, long size)
367{
368 /* some systems, notably openbsd and darwin, fail to properly
369 * implement realloc (x, 0) (as required by both ansi c-98 and
370 * the single unix specification, so work around them here.
371 */
372
373 if (size)
374 return realloc (ptr, size);
375
376 free (ptr);
377 return 0;
378}
379
297static void *(*alloc)(void *ptr, long size); 380static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
298 381
299void 382void
300ev_set_allocator (void *(*cb)(void *ptr, long size)) 383ev_set_allocator (void *(*cb)(void *ptr, long size))
301{ 384{
302 alloc = cb; 385 alloc = cb;
303} 386}
304 387
305inline_speed void * 388inline_speed void *
306ev_realloc (void *ptr, long size) 389ev_realloc (void *ptr, long size)
307{ 390{
308 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 391 ptr = alloc (ptr, size);
309 392
310 if (!ptr && size) 393 if (!ptr && size)
311 { 394 {
312 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 395 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
313 abort (); 396 abort ();
407{ 490{
408 return ev_rt_now; 491 return ev_rt_now;
409} 492}
410#endif 493#endif
411 494
495void
496ev_sleep (ev_tstamp delay)
497{
498 if (delay > 0.)
499 {
500#if EV_USE_NANOSLEEP
501 struct timespec ts;
502
503 ts.tv_sec = (time_t)delay;
504 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
505
506 nanosleep (&ts, 0);
507#elif defined(_WIN32)
508 Sleep ((unsigned long)(delay * 1e3));
509#else
510 struct timeval tv;
511
512 tv.tv_sec = (time_t)delay;
513 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
514
515 select (0, 0, 0, 0, &tv);
516#endif
517 }
518}
519
520/*****************************************************************************/
521
412int inline_size 522int inline_size
413array_nextsize (int elem, int cur, int cnt) 523array_nextsize (int elem, int cur, int cnt)
414{ 524{
415 int ncur = cur + 1; 525 int ncur = cur + 1;
416 526
476 pendings [pri][w_->pending - 1].w = w_; 586 pendings [pri][w_->pending - 1].w = w_;
477 pendings [pri][w_->pending - 1].events = revents; 587 pendings [pri][w_->pending - 1].events = revents;
478 } 588 }
479} 589}
480 590
481void inline_size 591void inline_speed
482queue_events (EV_P_ W *events, int eventcnt, int type) 592queue_events (EV_P_ W *events, int eventcnt, int type)
483{ 593{
484 int i; 594 int i;
485 595
486 for (i = 0; i < eventcnt; ++i) 596 for (i = 0; i < eventcnt; ++i)
533 { 643 {
534 int fd = fdchanges [i]; 644 int fd = fdchanges [i];
535 ANFD *anfd = anfds + fd; 645 ANFD *anfd = anfds + fd;
536 ev_io *w; 646 ev_io *w;
537 647
538 int events = 0; 648 unsigned char events = 0;
539 649
540 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 650 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
541 events |= w->events; 651 events |= (unsigned char)w->events;
542 652
543#if EV_SELECT_IS_WINSOCKET 653#if EV_SELECT_IS_WINSOCKET
544 if (events) 654 if (events)
545 { 655 {
546 unsigned long argp; 656 unsigned long argp;
657 #ifdef EV_FD_TO_WIN32_HANDLE
658 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
659 #else
547 anfd->handle = _get_osfhandle (fd); 660 anfd->handle = _get_osfhandle (fd);
661 #endif
548 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 662 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
549 } 663 }
550#endif 664#endif
551 665
666 {
667 unsigned char o_events = anfd->events;
668 unsigned char o_reify = anfd->reify;
669
552 anfd->reify = 0; 670 anfd->reify = 0;
553
554 backend_modify (EV_A_ fd, anfd->events, events);
555 anfd->events = events; 671 anfd->events = events;
672
673 if (o_events != events || o_reify & EV_IOFDSET)
674 backend_modify (EV_A_ fd, o_events, events);
675 }
556 } 676 }
557 677
558 fdchangecnt = 0; 678 fdchangecnt = 0;
559} 679}
560 680
561void inline_size 681void inline_size
562fd_change (EV_P_ int fd) 682fd_change (EV_P_ int fd, int flags)
563{ 683{
564 if (expect_false (anfds [fd].reify)) 684 unsigned char reify = anfds [fd].reify;
565 return;
566
567 anfds [fd].reify = 1; 685 anfds [fd].reify |= flags;
568 686
687 if (expect_true (!reify))
688 {
569 ++fdchangecnt; 689 ++fdchangecnt;
570 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 690 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
571 fdchanges [fdchangecnt - 1] = fd; 691 fdchanges [fdchangecnt - 1] = fd;
692 }
572} 693}
573 694
574void inline_speed 695void inline_speed
575fd_kill (EV_P_ int fd) 696fd_kill (EV_P_ int fd)
576{ 697{
627 748
628 for (fd = 0; fd < anfdmax; ++fd) 749 for (fd = 0; fd < anfdmax; ++fd)
629 if (anfds [fd].events) 750 if (anfds [fd].events)
630 { 751 {
631 anfds [fd].events = 0; 752 anfds [fd].events = 0;
632 fd_change (EV_A_ fd); 753 fd_change (EV_A_ fd, EV_IOFDSET | 1);
633 } 754 }
634} 755}
635 756
636/*****************************************************************************/ 757/*****************************************************************************/
637 758
638void inline_speed 759void inline_speed
639upheap (WT *heap, int k) 760upheap (WT *heap, int k)
640{ 761{
641 WT w = heap [k]; 762 WT w = heap [k];
642 763
643 while (k && heap [k >> 1]->at > w->at) 764 while (k)
644 { 765 {
766 int p = (k - 1) >> 1;
767
768 if (heap [p]->at <= w->at)
769 break;
770
645 heap [k] = heap [k >> 1]; 771 heap [k] = heap [p];
646 ((W)heap [k])->active = k + 1; 772 ((W)heap [k])->active = k + 1;
647 k >>= 1; 773 k = p;
648 } 774 }
649 775
650 heap [k] = w; 776 heap [k] = w;
651 ((W)heap [k])->active = k + 1; 777 ((W)heap [k])->active = k + 1;
652
653} 778}
654 779
655void inline_speed 780void inline_speed
656downheap (WT *heap, int N, int k) 781downheap (WT *heap, int N, int k)
657{ 782{
658 WT w = heap [k]; 783 WT w = heap [k];
659 784
660 while (k < (N >> 1)) 785 for (;;)
661 { 786 {
662 int j = k << 1; 787 int c = (k << 1) + 1;
663 788
664 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 789 if (c >= N)
665 ++j;
666
667 if (w->at <= heap [j]->at)
668 break; 790 break;
669 791
792 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
793 ? 1 : 0;
794
795 if (w->at <= heap [c]->at)
796 break;
797
670 heap [k] = heap [j]; 798 heap [k] = heap [c];
671 ((W)heap [k])->active = k + 1; 799 ((W)heap [k])->active = k + 1;
800
672 k = j; 801 k = c;
673 } 802 }
674 803
675 heap [k] = w; 804 heap [k] = w;
676 ((W)heap [k])->active = k + 1; 805 ((W)heap [k])->active = k + 1;
677} 806}
686/*****************************************************************************/ 815/*****************************************************************************/
687 816
688typedef struct 817typedef struct
689{ 818{
690 WL head; 819 WL head;
691 sig_atomic_t volatile gotsig; 820 EV_ATOMIC_T gotsig;
692} ANSIG; 821} ANSIG;
693 822
694static ANSIG *signals; 823static ANSIG *signals;
695static int signalmax; 824static int signalmax;
696 825
697static int sigpipe [2]; 826static EV_ATOMIC_T gotsig;
698static sig_atomic_t volatile gotsig;
699static ev_io sigev;
700 827
701void inline_size 828void inline_size
702signals_init (ANSIG *base, int count) 829signals_init (ANSIG *base, int count)
703{ 830{
704 while (count--) 831 while (count--)
708 835
709 ++base; 836 ++base;
710 } 837 }
711} 838}
712 839
713static void 840/*****************************************************************************/
714sighandler (int signum)
715{
716#if _WIN32
717 signal (signum, sighandler);
718#endif
719
720 signals [signum - 1].gotsig = 1;
721
722 if (!gotsig)
723 {
724 int old_errno = errno;
725 gotsig = 1;
726 write (sigpipe [1], &signum, 1);
727 errno = old_errno;
728 }
729}
730
731void noinline
732ev_feed_signal_event (EV_P_ int signum)
733{
734 WL w;
735
736#if EV_MULTIPLICITY
737 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
738#endif
739
740 --signum;
741
742 if (signum < 0 || signum >= signalmax)
743 return;
744
745 signals [signum].gotsig = 0;
746
747 for (w = signals [signum].head; w; w = w->next)
748 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
749}
750
751static void
752sigcb (EV_P_ ev_io *iow, int revents)
753{
754 int signum;
755
756 read (sigpipe [0], &revents, 1);
757 gotsig = 0;
758
759 for (signum = signalmax; signum--; )
760 if (signals [signum].gotsig)
761 ev_feed_signal_event (EV_A_ signum + 1);
762}
763 841
764void inline_speed 842void inline_speed
765fd_intern (int fd) 843fd_intern (int fd)
766{ 844{
767#ifdef _WIN32 845#ifdef _WIN32
772 fcntl (fd, F_SETFL, O_NONBLOCK); 850 fcntl (fd, F_SETFL, O_NONBLOCK);
773#endif 851#endif
774} 852}
775 853
776static void noinline 854static void noinline
777siginit (EV_P) 855evpipe_init (EV_P)
778{ 856{
857 if (!ev_is_active (&pipeev))
858 {
859#if EV_USE_EVENTFD
860 if ((evfd = eventfd (0, 0)) >= 0)
861 {
862 evpipe [0] = -1;
863 fd_intern (evfd);
864 ev_io_set (&pipeev, evfd, EV_READ);
865 }
866 else
867#endif
868 {
869 while (pipe (evpipe))
870 syserr ("(libev) error creating signal/async pipe");
871
779 fd_intern (sigpipe [0]); 872 fd_intern (evpipe [0]);
780 fd_intern (sigpipe [1]); 873 fd_intern (evpipe [1]);
874 ev_io_set (&pipeev, evpipe [0], EV_READ);
875 }
781 876
782 ev_io_set (&sigev, sigpipe [0], EV_READ);
783 ev_io_start (EV_A_ &sigev); 877 ev_io_start (EV_A_ &pipeev);
784 ev_unref (EV_A); /* child watcher should not keep loop alive */ 878 ev_unref (EV_A); /* watcher should not keep loop alive */
879 }
880}
881
882void inline_size
883evpipe_write (EV_P_ EV_ATOMIC_T *flag)
884{
885 if (!*flag)
886 {
887 int old_errno = errno; /* save errno because write might clobber it */
888
889 *flag = 1;
890
891#if EV_USE_EVENTFD
892 if (evfd >= 0)
893 {
894 uint64_t counter = 1;
895 write (evfd, &counter, sizeof (uint64_t));
896 }
897 else
898#endif
899 write (evpipe [1], &old_errno, 1);
900
901 errno = old_errno;
902 }
903}
904
905static void
906pipecb (EV_P_ ev_io *iow, int revents)
907{
908#if EV_USE_EVENTFD
909 if (evfd >= 0)
910 {
911 uint64_t counter = 1;
912 read (evfd, &counter, sizeof (uint64_t));
913 }
914 else
915#endif
916 {
917 char dummy;
918 read (evpipe [0], &dummy, 1);
919 }
920
921 if (gotsig && ev_is_default_loop (EV_A))
922 {
923 int signum;
924 gotsig = 0;
925
926 for (signum = signalmax; signum--; )
927 if (signals [signum].gotsig)
928 ev_feed_signal_event (EV_A_ signum + 1);
929 }
930
931#if EV_ASYNC_ENABLE
932 if (gotasync)
933 {
934 int i;
935 gotasync = 0;
936
937 for (i = asynccnt; i--; )
938 if (asyncs [i]->sent)
939 {
940 asyncs [i]->sent = 0;
941 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
942 }
943 }
944#endif
785} 945}
786 946
787/*****************************************************************************/ 947/*****************************************************************************/
788 948
949static void
950ev_sighandler (int signum)
951{
952#if EV_MULTIPLICITY
953 struct ev_loop *loop = &default_loop_struct;
954#endif
955
956#if _WIN32
957 signal (signum, ev_sighandler);
958#endif
959
960 signals [signum - 1].gotsig = 1;
961 evpipe_write (EV_A_ &gotsig);
962}
963
964void noinline
965ev_feed_signal_event (EV_P_ int signum)
966{
967 WL w;
968
969#if EV_MULTIPLICITY
970 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
971#endif
972
973 --signum;
974
975 if (signum < 0 || signum >= signalmax)
976 return;
977
978 signals [signum].gotsig = 0;
979
980 for (w = signals [signum].head; w; w = w->next)
981 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
982}
983
984/*****************************************************************************/
985
789static ev_child *childs [EV_PID_HASHSIZE]; 986static WL childs [EV_PID_HASHSIZE];
790 987
791#ifndef _WIN32 988#ifndef _WIN32
792 989
793static ev_signal childev; 990static ev_signal childev;
794 991
992#ifndef WIFCONTINUED
993# define WIFCONTINUED(status) 0
994#endif
995
795void inline_speed 996void inline_speed
796child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 997child_reap (EV_P_ int chain, int pid, int status)
797{ 998{
798 ev_child *w; 999 ev_child *w;
1000 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
799 1001
800 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1002 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1003 {
801 if (w->pid == pid || !w->pid) 1004 if ((w->pid == pid || !w->pid)
1005 && (!traced || (w->flags & 1)))
802 { 1006 {
803 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1007 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
804 w->rpid = pid; 1008 w->rpid = pid;
805 w->rstatus = status; 1009 w->rstatus = status;
806 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1010 ev_feed_event (EV_A_ (W)w, EV_CHILD);
807 } 1011 }
1012 }
808} 1013}
809 1014
810#ifndef WCONTINUED 1015#ifndef WCONTINUED
811# define WCONTINUED 0 1016# define WCONTINUED 0
812#endif 1017#endif
821 if (!WCONTINUED 1026 if (!WCONTINUED
822 || errno != EINVAL 1027 || errno != EINVAL
823 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1028 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
824 return; 1029 return;
825 1030
826 /* make sure we are called again until all childs have been reaped */ 1031 /* make sure we are called again until all children have been reaped */
827 /* we need to do it this way so that the callback gets called before we continue */ 1032 /* we need to do it this way so that the callback gets called before we continue */
828 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1033 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
829 1034
830 child_reap (EV_A_ sw, pid, pid, status); 1035 child_reap (EV_A_ pid, pid, status);
831 if (EV_PID_HASHSIZE > 1) 1036 if (EV_PID_HASHSIZE > 1)
832 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1037 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
833} 1038}
834 1039
835#endif 1040#endif
836 1041
837/*****************************************************************************/ 1042/*****************************************************************************/
909} 1114}
910 1115
911unsigned int 1116unsigned int
912ev_embeddable_backends (void) 1117ev_embeddable_backends (void)
913{ 1118{
914 return EVBACKEND_EPOLL 1119 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
915 | EVBACKEND_KQUEUE 1120
916 | EVBACKEND_PORT; 1121 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1122 /* please fix it and tell me how to detect the fix */
1123 flags &= ~EVBACKEND_EPOLL;
1124
1125 return flags;
917} 1126}
918 1127
919unsigned int 1128unsigned int
920ev_backend (EV_P) 1129ev_backend (EV_P)
921{ 1130{
924 1133
925unsigned int 1134unsigned int
926ev_loop_count (EV_P) 1135ev_loop_count (EV_P)
927{ 1136{
928 return loop_count; 1137 return loop_count;
1138}
1139
1140void
1141ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1142{
1143 io_blocktime = interval;
1144}
1145
1146void
1147ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1148{
1149 timeout_blocktime = interval;
929} 1150}
930 1151
931static void noinline 1152static void noinline
932loop_init (EV_P_ unsigned int flags) 1153loop_init (EV_P_ unsigned int flags)
933{ 1154{
939 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1160 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
940 have_monotonic = 1; 1161 have_monotonic = 1;
941 } 1162 }
942#endif 1163#endif
943 1164
944 ev_rt_now = ev_time (); 1165 ev_rt_now = ev_time ();
945 mn_now = get_clock (); 1166 mn_now = get_clock ();
946 now_floor = mn_now; 1167 now_floor = mn_now;
947 rtmn_diff = ev_rt_now - mn_now; 1168 rtmn_diff = ev_rt_now - mn_now;
1169
1170 io_blocktime = 0.;
1171 timeout_blocktime = 0.;
1172 backend = 0;
1173 backend_fd = -1;
1174 gotasync = 0;
1175#if EV_USE_INOTIFY
1176 fs_fd = -2;
1177#endif
948 1178
949 /* pid check not overridable via env */ 1179 /* pid check not overridable via env */
950#ifndef _WIN32 1180#ifndef _WIN32
951 if (flags & EVFLAG_FORKCHECK) 1181 if (flags & EVFLAG_FORKCHECK)
952 curpid = getpid (); 1182 curpid = getpid ();
955 if (!(flags & EVFLAG_NOENV) 1185 if (!(flags & EVFLAG_NOENV)
956 && !enable_secure () 1186 && !enable_secure ()
957 && getenv ("LIBEV_FLAGS")) 1187 && getenv ("LIBEV_FLAGS"))
958 flags = atoi (getenv ("LIBEV_FLAGS")); 1188 flags = atoi (getenv ("LIBEV_FLAGS"));
959 1189
960 if (!(flags & 0x0000ffffUL)) 1190 if (!(flags & 0x0000ffffU))
961 flags |= ev_recommended_backends (); 1191 flags |= ev_recommended_backends ();
962
963 backend = 0;
964 backend_fd = -1;
965#if EV_USE_INOTIFY
966 fs_fd = -2;
967#endif
968 1192
969#if EV_USE_PORT 1193#if EV_USE_PORT
970 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1194 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
971#endif 1195#endif
972#if EV_USE_KQUEUE 1196#if EV_USE_KQUEUE
980#endif 1204#endif
981#if EV_USE_SELECT 1205#if EV_USE_SELECT
982 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1206 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
983#endif 1207#endif
984 1208
985 ev_init (&sigev, sigcb); 1209 ev_init (&pipeev, pipecb);
986 ev_set_priority (&sigev, EV_MAXPRI); 1210 ev_set_priority (&pipeev, EV_MAXPRI);
987 } 1211 }
988} 1212}
989 1213
990static void noinline 1214static void noinline
991loop_destroy (EV_P) 1215loop_destroy (EV_P)
992{ 1216{
993 int i; 1217 int i;
1218
1219 if (ev_is_active (&pipeev))
1220 {
1221 ev_ref (EV_A); /* signal watcher */
1222 ev_io_stop (EV_A_ &pipeev);
1223
1224#if EV_USE_EVENTFD
1225 if (evfd >= 0)
1226 close (evfd);
1227#endif
1228
1229 if (evpipe [0] >= 0)
1230 {
1231 close (evpipe [0]);
1232 close (evpipe [1]);
1233 }
1234 }
994 1235
995#if EV_USE_INOTIFY 1236#if EV_USE_INOTIFY
996 if (fs_fd >= 0) 1237 if (fs_fd >= 0)
997 close (fs_fd); 1238 close (fs_fd);
998#endif 1239#endif
1021 array_free (pending, [i]); 1262 array_free (pending, [i]);
1022#if EV_IDLE_ENABLE 1263#if EV_IDLE_ENABLE
1023 array_free (idle, [i]); 1264 array_free (idle, [i]);
1024#endif 1265#endif
1025 } 1266 }
1267
1268 ev_free (anfds); anfdmax = 0;
1026 1269
1027 /* have to use the microsoft-never-gets-it-right macro */ 1270 /* have to use the microsoft-never-gets-it-right macro */
1028 array_free (fdchange, EMPTY); 1271 array_free (fdchange, EMPTY);
1029 array_free (timer, EMPTY); 1272 array_free (timer, EMPTY);
1030#if EV_PERIODIC_ENABLE 1273#if EV_PERIODIC_ENABLE
1031 array_free (periodic, EMPTY); 1274 array_free (periodic, EMPTY);
1032#endif 1275#endif
1276#if EV_FORK_ENABLE
1277 array_free (fork, EMPTY);
1278#endif
1033 array_free (prepare, EMPTY); 1279 array_free (prepare, EMPTY);
1034 array_free (check, EMPTY); 1280 array_free (check, EMPTY);
1281#if EV_ASYNC_ENABLE
1282 array_free (async, EMPTY);
1283#endif
1035 1284
1036 backend = 0; 1285 backend = 0;
1037} 1286}
1038 1287
1039void inline_size infy_fork (EV_P); 1288void inline_size infy_fork (EV_P);
1052#endif 1301#endif
1053#if EV_USE_INOTIFY 1302#if EV_USE_INOTIFY
1054 infy_fork (EV_A); 1303 infy_fork (EV_A);
1055#endif 1304#endif
1056 1305
1057 if (ev_is_active (&sigev)) 1306 if (ev_is_active (&pipeev))
1058 { 1307 {
1059 /* default loop */ 1308 /* this "locks" the handlers against writing to the pipe */
1309 /* while we modify the fd vars */
1310 gotsig = 1;
1311#if EV_ASYNC_ENABLE
1312 gotasync = 1;
1313#endif
1060 1314
1061 ev_ref (EV_A); 1315 ev_ref (EV_A);
1062 ev_io_stop (EV_A_ &sigev); 1316 ev_io_stop (EV_A_ &pipeev);
1317
1318#if EV_USE_EVENTFD
1319 if (evfd >= 0)
1320 close (evfd);
1321#endif
1322
1323 if (evpipe [0] >= 0)
1324 {
1063 close (sigpipe [0]); 1325 close (evpipe [0]);
1064 close (sigpipe [1]); 1326 close (evpipe [1]);
1327 }
1065 1328
1066 while (pipe (sigpipe))
1067 syserr ("(libev) error creating pipe");
1068
1069 siginit (EV_A); 1329 evpipe_init (EV_A);
1330 /* now iterate over everything, in case we missed something */
1331 pipecb (EV_A_ &pipeev, EV_READ);
1070 } 1332 }
1071 1333
1072 postfork = 0; 1334 postfork = 0;
1073} 1335}
1074 1336
1096} 1358}
1097 1359
1098void 1360void
1099ev_loop_fork (EV_P) 1361ev_loop_fork (EV_P)
1100{ 1362{
1101 postfork = 1; 1363 postfork = 1; /* must be in line with ev_default_fork */
1102} 1364}
1103 1365
1104#endif 1366#endif
1105 1367
1106#if EV_MULTIPLICITY 1368#if EV_MULTIPLICITY
1109#else 1371#else
1110int 1372int
1111ev_default_loop (unsigned int flags) 1373ev_default_loop (unsigned int flags)
1112#endif 1374#endif
1113{ 1375{
1114 if (sigpipe [0] == sigpipe [1])
1115 if (pipe (sigpipe))
1116 return 0;
1117
1118 if (!ev_default_loop_ptr) 1376 if (!ev_default_loop_ptr)
1119 { 1377 {
1120#if EV_MULTIPLICITY 1378#if EV_MULTIPLICITY
1121 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1379 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1122#else 1380#else
1125 1383
1126 loop_init (EV_A_ flags); 1384 loop_init (EV_A_ flags);
1127 1385
1128 if (ev_backend (EV_A)) 1386 if (ev_backend (EV_A))
1129 { 1387 {
1130 siginit (EV_A);
1131
1132#ifndef _WIN32 1388#ifndef _WIN32
1133 ev_signal_init (&childev, childcb, SIGCHLD); 1389 ev_signal_init (&childev, childcb, SIGCHLD);
1134 ev_set_priority (&childev, EV_MAXPRI); 1390 ev_set_priority (&childev, EV_MAXPRI);
1135 ev_signal_start (EV_A_ &childev); 1391 ev_signal_start (EV_A_ &childev);
1136 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1392 ev_unref (EV_A); /* child watcher should not keep loop alive */
1153#ifndef _WIN32 1409#ifndef _WIN32
1154 ev_ref (EV_A); /* child watcher */ 1410 ev_ref (EV_A); /* child watcher */
1155 ev_signal_stop (EV_A_ &childev); 1411 ev_signal_stop (EV_A_ &childev);
1156#endif 1412#endif
1157 1413
1158 ev_ref (EV_A); /* signal watcher */
1159 ev_io_stop (EV_A_ &sigev);
1160
1161 close (sigpipe [0]); sigpipe [0] = 0;
1162 close (sigpipe [1]); sigpipe [1] = 0;
1163
1164 loop_destroy (EV_A); 1414 loop_destroy (EV_A);
1165} 1415}
1166 1416
1167void 1417void
1168ev_default_fork (void) 1418ev_default_fork (void)
1170#if EV_MULTIPLICITY 1420#if EV_MULTIPLICITY
1171 struct ev_loop *loop = ev_default_loop_ptr; 1421 struct ev_loop *loop = ev_default_loop_ptr;
1172#endif 1422#endif
1173 1423
1174 if (backend) 1424 if (backend)
1175 postfork = 1; 1425 postfork = 1; /* must be in line with ev_loop_fork */
1176} 1426}
1177 1427
1178/*****************************************************************************/ 1428/*****************************************************************************/
1179 1429
1180void 1430void
1206void inline_size 1456void inline_size
1207timers_reify (EV_P) 1457timers_reify (EV_P)
1208{ 1458{
1209 while (timercnt && ((WT)timers [0])->at <= mn_now) 1459 while (timercnt && ((WT)timers [0])->at <= mn_now)
1210 { 1460 {
1211 ev_timer *w = timers [0]; 1461 ev_timer *w = (ev_timer *)timers [0];
1212 1462
1213 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/ 1463 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1214 1464
1215 /* first reschedule or stop timer */ 1465 /* first reschedule or stop timer */
1216 if (w->repeat) 1466 if (w->repeat)
1219 1469
1220 ((WT)w)->at += w->repeat; 1470 ((WT)w)->at += w->repeat;
1221 if (((WT)w)->at < mn_now) 1471 if (((WT)w)->at < mn_now)
1222 ((WT)w)->at = mn_now; 1472 ((WT)w)->at = mn_now;
1223 1473
1224 downheap ((WT *)timers, timercnt, 0); 1474 downheap (timers, timercnt, 0);
1225 } 1475 }
1226 else 1476 else
1227 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1477 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1228 1478
1229 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1479 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1234void inline_size 1484void inline_size
1235periodics_reify (EV_P) 1485periodics_reify (EV_P)
1236{ 1486{
1237 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1487 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1238 { 1488 {
1239 ev_periodic *w = periodics [0]; 1489 ev_periodic *w = (ev_periodic *)periodics [0];
1240 1490
1241 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 1491 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1242 1492
1243 /* first reschedule or stop timer */ 1493 /* first reschedule or stop timer */
1244 if (w->reschedule_cb) 1494 if (w->reschedule_cb)
1245 { 1495 {
1246 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON); 1496 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1247 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1497 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1248 downheap ((WT *)periodics, periodiccnt, 0); 1498 downheap (periodics, periodiccnt, 0);
1249 } 1499 }
1250 else if (w->interval) 1500 else if (w->interval)
1251 { 1501 {
1252 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 1502 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1253 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval; 1503 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1254 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1504 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1255 downheap ((WT *)periodics, periodiccnt, 0); 1505 downheap (periodics, periodiccnt, 0);
1256 } 1506 }
1257 else 1507 else
1258 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1508 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1259 1509
1260 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1510 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1267 int i; 1517 int i;
1268 1518
1269 /* adjust periodics after time jump */ 1519 /* adjust periodics after time jump */
1270 for (i = 0; i < periodiccnt; ++i) 1520 for (i = 0; i < periodiccnt; ++i)
1271 { 1521 {
1272 ev_periodic *w = periodics [i]; 1522 ev_periodic *w = (ev_periodic *)periodics [i];
1273 1523
1274 if (w->reschedule_cb) 1524 if (w->reschedule_cb)
1275 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1525 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1276 else if (w->interval) 1526 else if (w->interval)
1277 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 1527 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1278 } 1528 }
1279 1529
1280 /* now rebuild the heap */ 1530 /* now rebuild the heap */
1281 for (i = periodiccnt >> 1; i--; ) 1531 for (i = periodiccnt >> 1; i--; )
1282 downheap ((WT *)periodics, periodiccnt, i); 1532 downheap (periodics, periodiccnt, i);
1283} 1533}
1284#endif 1534#endif
1285 1535
1286#if EV_IDLE_ENABLE 1536#if EV_IDLE_ENABLE
1287void inline_size 1537void inline_size
1389static int loop_done; 1639static int loop_done;
1390 1640
1391void 1641void
1392ev_loop (EV_P_ int flags) 1642ev_loop (EV_P_ int flags)
1393{ 1643{
1394 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 1644 loop_done = EVUNLOOP_CANCEL;
1395 ? EVUNLOOP_ONE
1396 : EVUNLOOP_CANCEL;
1397 1645
1398 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 1646 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1399 1647
1400 do 1648 do
1401 { 1649 {
1435 /* update fd-related kernel structures */ 1683 /* update fd-related kernel structures */
1436 fd_reify (EV_A); 1684 fd_reify (EV_A);
1437 1685
1438 /* calculate blocking time */ 1686 /* calculate blocking time */
1439 { 1687 {
1440 ev_tstamp block; 1688 ev_tstamp waittime = 0.;
1689 ev_tstamp sleeptime = 0.;
1441 1690
1442 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 1691 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1443 block = 0.; /* do not block at all */
1444 else
1445 { 1692 {
1446 /* update time to cancel out callback processing overhead */ 1693 /* update time to cancel out callback processing overhead */
1447 time_update (EV_A_ 1e100); 1694 time_update (EV_A_ 1e100);
1448 1695
1449 block = MAX_BLOCKTIME; 1696 waittime = MAX_BLOCKTIME;
1450 1697
1451 if (timercnt) 1698 if (timercnt)
1452 { 1699 {
1453 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 1700 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1454 if (block > to) block = to; 1701 if (waittime > to) waittime = to;
1455 } 1702 }
1456 1703
1457#if EV_PERIODIC_ENABLE 1704#if EV_PERIODIC_ENABLE
1458 if (periodiccnt) 1705 if (periodiccnt)
1459 { 1706 {
1460 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 1707 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1461 if (block > to) block = to; 1708 if (waittime > to) waittime = to;
1462 } 1709 }
1463#endif 1710#endif
1464 1711
1465 if (expect_false (block < 0.)) block = 0.; 1712 if (expect_false (waittime < timeout_blocktime))
1713 waittime = timeout_blocktime;
1714
1715 sleeptime = waittime - backend_fudge;
1716
1717 if (expect_true (sleeptime > io_blocktime))
1718 sleeptime = io_blocktime;
1719
1720 if (sleeptime)
1721 {
1722 ev_sleep (sleeptime);
1723 waittime -= sleeptime;
1724 }
1466 } 1725 }
1467 1726
1468 ++loop_count; 1727 ++loop_count;
1469 backend_poll (EV_A_ block); 1728 backend_poll (EV_A_ waittime);
1470 1729
1471 /* update ev_rt_now, do magic */ 1730 /* update ev_rt_now, do magic */
1472 time_update (EV_A_ block); 1731 time_update (EV_A_ waittime + sleeptime);
1473 } 1732 }
1474 1733
1475 /* queue pending timers and reschedule them */ 1734 /* queue pending timers and reschedule them */
1476 timers_reify (EV_A); /* relative timers called last */ 1735 timers_reify (EV_A); /* relative timers called last */
1477#if EV_PERIODIC_ENABLE 1736#if EV_PERIODIC_ENABLE
1486 /* queue check watchers, to be executed first */ 1745 /* queue check watchers, to be executed first */
1487 if (expect_false (checkcnt)) 1746 if (expect_false (checkcnt))
1488 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1747 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1489 1748
1490 call_pending (EV_A); 1749 call_pending (EV_A);
1491
1492 } 1750 }
1493 while (expect_true (activecnt && !loop_done)); 1751 while (expect_true (
1752 activecnt
1753 && !loop_done
1754 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1755 ));
1494 1756
1495 if (loop_done == EVUNLOOP_ONE) 1757 if (loop_done == EVUNLOOP_ONE)
1496 loop_done = EVUNLOOP_CANCEL; 1758 loop_done = EVUNLOOP_CANCEL;
1497} 1759}
1498 1760
1589 1851
1590 assert (("ev_io_start called with negative fd", fd >= 0)); 1852 assert (("ev_io_start called with negative fd", fd >= 0));
1591 1853
1592 ev_start (EV_A_ (W)w, 1); 1854 ev_start (EV_A_ (W)w, 1);
1593 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 1855 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1594 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1856 wlist_add (&anfds[fd].head, (WL)w);
1595 1857
1596 fd_change (EV_A_ fd); 1858 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1859 w->events &= ~EV_IOFDSET;
1597} 1860}
1598 1861
1599void noinline 1862void noinline
1600ev_io_stop (EV_P_ ev_io *w) 1863ev_io_stop (EV_P_ ev_io *w)
1601{ 1864{
1603 if (expect_false (!ev_is_active (w))) 1866 if (expect_false (!ev_is_active (w)))
1604 return; 1867 return;
1605 1868
1606 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 1869 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1607 1870
1608 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1871 wlist_del (&anfds[w->fd].head, (WL)w);
1609 ev_stop (EV_A_ (W)w); 1872 ev_stop (EV_A_ (W)w);
1610 1873
1611 fd_change (EV_A_ w->fd); 1874 fd_change (EV_A_ w->fd, 1);
1612} 1875}
1613 1876
1614void noinline 1877void noinline
1615ev_timer_start (EV_P_ ev_timer *w) 1878ev_timer_start (EV_P_ ev_timer *w)
1616{ 1879{
1620 ((WT)w)->at += mn_now; 1883 ((WT)w)->at += mn_now;
1621 1884
1622 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1885 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1623 1886
1624 ev_start (EV_A_ (W)w, ++timercnt); 1887 ev_start (EV_A_ (W)w, ++timercnt);
1625 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 1888 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1626 timers [timercnt - 1] = w; 1889 timers [timercnt - 1] = (WT)w;
1627 upheap ((WT *)timers, timercnt - 1); 1890 upheap (timers, timercnt - 1);
1628 1891
1629 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 1892 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1630} 1893}
1631 1894
1632void noinline 1895void noinline
1634{ 1897{
1635 clear_pending (EV_A_ (W)w); 1898 clear_pending (EV_A_ (W)w);
1636 if (expect_false (!ev_is_active (w))) 1899 if (expect_false (!ev_is_active (w)))
1637 return; 1900 return;
1638 1901
1639 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1902 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1640 1903
1641 { 1904 {
1642 int active = ((W)w)->active; 1905 int active = ((W)w)->active;
1643 1906
1644 if (expect_true (--active < --timercnt)) 1907 if (expect_true (--active < --timercnt))
1645 { 1908 {
1646 timers [active] = timers [timercnt]; 1909 timers [active] = timers [timercnt];
1647 adjustheap ((WT *)timers, timercnt, active); 1910 adjustheap (timers, timercnt, active);
1648 } 1911 }
1649 } 1912 }
1650 1913
1651 ((WT)w)->at -= mn_now; 1914 ((WT)w)->at -= mn_now;
1652 1915
1659 if (ev_is_active (w)) 1922 if (ev_is_active (w))
1660 { 1923 {
1661 if (w->repeat) 1924 if (w->repeat)
1662 { 1925 {
1663 ((WT)w)->at = mn_now + w->repeat; 1926 ((WT)w)->at = mn_now + w->repeat;
1664 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1927 adjustheap (timers, timercnt, ((W)w)->active - 1);
1665 } 1928 }
1666 else 1929 else
1667 ev_timer_stop (EV_A_ w); 1930 ev_timer_stop (EV_A_ w);
1668 } 1931 }
1669 else if (w->repeat) 1932 else if (w->repeat)
1690 } 1953 }
1691 else 1954 else
1692 ((WT)w)->at = w->offset; 1955 ((WT)w)->at = w->offset;
1693 1956
1694 ev_start (EV_A_ (W)w, ++periodiccnt); 1957 ev_start (EV_A_ (W)w, ++periodiccnt);
1695 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 1958 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1696 periodics [periodiccnt - 1] = w; 1959 periodics [periodiccnt - 1] = (WT)w;
1697 upheap ((WT *)periodics, periodiccnt - 1); 1960 upheap (periodics, periodiccnt - 1);
1698 1961
1699 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 1962 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1700} 1963}
1701 1964
1702void noinline 1965void noinline
1704{ 1967{
1705 clear_pending (EV_A_ (W)w); 1968 clear_pending (EV_A_ (W)w);
1706 if (expect_false (!ev_is_active (w))) 1969 if (expect_false (!ev_is_active (w)))
1707 return; 1970 return;
1708 1971
1709 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1972 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1710 1973
1711 { 1974 {
1712 int active = ((W)w)->active; 1975 int active = ((W)w)->active;
1713 1976
1714 if (expect_true (--active < --periodiccnt)) 1977 if (expect_true (--active < --periodiccnt))
1715 { 1978 {
1716 periodics [active] = periodics [periodiccnt]; 1979 periodics [active] = periodics [periodiccnt];
1717 adjustheap ((WT *)periodics, periodiccnt, active); 1980 adjustheap (periodics, periodiccnt, active);
1718 } 1981 }
1719 } 1982 }
1720 1983
1721 ev_stop (EV_A_ (W)w); 1984 ev_stop (EV_A_ (W)w);
1722} 1985}
1743 if (expect_false (ev_is_active (w))) 2006 if (expect_false (ev_is_active (w)))
1744 return; 2007 return;
1745 2008
1746 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2009 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1747 2010
2011 evpipe_init (EV_A);
2012
2013 {
2014#ifndef _WIN32
2015 sigset_t full, prev;
2016 sigfillset (&full);
2017 sigprocmask (SIG_SETMASK, &full, &prev);
2018#endif
2019
2020 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2021
2022#ifndef _WIN32
2023 sigprocmask (SIG_SETMASK, &prev, 0);
2024#endif
2025 }
2026
1748 ev_start (EV_A_ (W)w, 1); 2027 ev_start (EV_A_ (W)w, 1);
1749 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1750 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2028 wlist_add (&signals [w->signum - 1].head, (WL)w);
1751 2029
1752 if (!((WL)w)->next) 2030 if (!((WL)w)->next)
1753 { 2031 {
1754#if _WIN32 2032#if _WIN32
1755 signal (w->signum, sighandler); 2033 signal (w->signum, ev_sighandler);
1756#else 2034#else
1757 struct sigaction sa; 2035 struct sigaction sa;
1758 sa.sa_handler = sighandler; 2036 sa.sa_handler = ev_sighandler;
1759 sigfillset (&sa.sa_mask); 2037 sigfillset (&sa.sa_mask);
1760 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2038 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1761 sigaction (w->signum, &sa, 0); 2039 sigaction (w->signum, &sa, 0);
1762#endif 2040#endif
1763 } 2041 }
1768{ 2046{
1769 clear_pending (EV_A_ (W)w); 2047 clear_pending (EV_A_ (W)w);
1770 if (expect_false (!ev_is_active (w))) 2048 if (expect_false (!ev_is_active (w)))
1771 return; 2049 return;
1772 2050
1773 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2051 wlist_del (&signals [w->signum - 1].head, (WL)w);
1774 ev_stop (EV_A_ (W)w); 2052 ev_stop (EV_A_ (W)w);
1775 2053
1776 if (!signals [w->signum - 1].head) 2054 if (!signals [w->signum - 1].head)
1777 signal (w->signum, SIG_DFL); 2055 signal (w->signum, SIG_DFL);
1778} 2056}
1785#endif 2063#endif
1786 if (expect_false (ev_is_active (w))) 2064 if (expect_false (ev_is_active (w)))
1787 return; 2065 return;
1788 2066
1789 ev_start (EV_A_ (W)w, 1); 2067 ev_start (EV_A_ (W)w, 1);
1790 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2068 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1791} 2069}
1792 2070
1793void 2071void
1794ev_child_stop (EV_P_ ev_child *w) 2072ev_child_stop (EV_P_ ev_child *w)
1795{ 2073{
1796 clear_pending (EV_A_ (W)w); 2074 clear_pending (EV_A_ (W)w);
1797 if (expect_false (!ev_is_active (w))) 2075 if (expect_false (!ev_is_active (w)))
1798 return; 2076 return;
1799 2077
1800 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2078 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1801 ev_stop (EV_A_ (W)w); 2079 ev_stop (EV_A_ (W)w);
1802} 2080}
1803 2081
1804#if EV_STAT_ENABLE 2082#if EV_STAT_ENABLE
1805 2083
2147 2425
2148#if EV_EMBED_ENABLE 2426#if EV_EMBED_ENABLE
2149void noinline 2427void noinline
2150ev_embed_sweep (EV_P_ ev_embed *w) 2428ev_embed_sweep (EV_P_ ev_embed *w)
2151{ 2429{
2152 ev_loop (w->loop, EVLOOP_NONBLOCK); 2430 ev_loop (w->other, EVLOOP_NONBLOCK);
2153} 2431}
2154 2432
2155static void 2433static void
2156embed_cb (EV_P_ ev_io *io, int revents) 2434embed_io_cb (EV_P_ ev_io *io, int revents)
2157{ 2435{
2158 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 2436 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2159 2437
2160 if (ev_cb (w)) 2438 if (ev_cb (w))
2161 ev_feed_event (EV_A_ (W)w, EV_EMBED); 2439 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2162 else 2440 else
2163 ev_embed_sweep (loop, w); 2441 ev_loop (w->other, EVLOOP_NONBLOCK);
2164} 2442}
2443
2444static void
2445embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2446{
2447 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2448
2449 {
2450 struct ev_loop *loop = w->other;
2451
2452 while (fdchangecnt)
2453 {
2454 fd_reify (EV_A);
2455 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2456 }
2457 }
2458}
2459
2460#if 0
2461static void
2462embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2463{
2464 ev_idle_stop (EV_A_ idle);
2465}
2466#endif
2165 2467
2166void 2468void
2167ev_embed_start (EV_P_ ev_embed *w) 2469ev_embed_start (EV_P_ ev_embed *w)
2168{ 2470{
2169 if (expect_false (ev_is_active (w))) 2471 if (expect_false (ev_is_active (w)))
2170 return; 2472 return;
2171 2473
2172 { 2474 {
2173 struct ev_loop *loop = w->loop; 2475 struct ev_loop *loop = w->other;
2174 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 2476 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2175 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 2477 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2176 } 2478 }
2177 2479
2178 ev_set_priority (&w->io, ev_priority (w)); 2480 ev_set_priority (&w->io, ev_priority (w));
2179 ev_io_start (EV_A_ &w->io); 2481 ev_io_start (EV_A_ &w->io);
2180 2482
2483 ev_prepare_init (&w->prepare, embed_prepare_cb);
2484 ev_set_priority (&w->prepare, EV_MINPRI);
2485 ev_prepare_start (EV_A_ &w->prepare);
2486
2487 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2488
2181 ev_start (EV_A_ (W)w, 1); 2489 ev_start (EV_A_ (W)w, 1);
2182} 2490}
2183 2491
2184void 2492void
2185ev_embed_stop (EV_P_ ev_embed *w) 2493ev_embed_stop (EV_P_ ev_embed *w)
2187 clear_pending (EV_A_ (W)w); 2495 clear_pending (EV_A_ (W)w);
2188 if (expect_false (!ev_is_active (w))) 2496 if (expect_false (!ev_is_active (w)))
2189 return; 2497 return;
2190 2498
2191 ev_io_stop (EV_A_ &w->io); 2499 ev_io_stop (EV_A_ &w->io);
2500 ev_prepare_stop (EV_A_ &w->prepare);
2192 2501
2193 ev_stop (EV_A_ (W)w); 2502 ev_stop (EV_A_ (W)w);
2194} 2503}
2195#endif 2504#endif
2196 2505
2221 2530
2222 ev_stop (EV_A_ (W)w); 2531 ev_stop (EV_A_ (W)w);
2223} 2532}
2224#endif 2533#endif
2225 2534
2535#if EV_ASYNC_ENABLE
2536void
2537ev_async_start (EV_P_ ev_async *w)
2538{
2539 if (expect_false (ev_is_active (w)))
2540 return;
2541
2542 evpipe_init (EV_A);
2543
2544 ev_start (EV_A_ (W)w, ++asynccnt);
2545 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2546 asyncs [asynccnt - 1] = w;
2547}
2548
2549void
2550ev_async_stop (EV_P_ ev_async *w)
2551{
2552 clear_pending (EV_A_ (W)w);
2553 if (expect_false (!ev_is_active (w)))
2554 return;
2555
2556 {
2557 int active = ((W)w)->active;
2558 asyncs [active - 1] = asyncs [--asynccnt];
2559 ((W)asyncs [active - 1])->active = active;
2560 }
2561
2562 ev_stop (EV_A_ (W)w);
2563}
2564
2565void
2566ev_async_send (EV_P_ ev_async *w)
2567{
2568 w->sent = 1;
2569 evpipe_write (EV_A_ &gotasync);
2570}
2571#endif
2572
2226/*****************************************************************************/ 2573/*****************************************************************************/
2227 2574
2228struct ev_once 2575struct ev_once
2229{ 2576{
2230 ev_io io; 2577 ev_io io;
2285 ev_timer_set (&once->to, timeout, 0.); 2632 ev_timer_set (&once->to, timeout, 0.);
2286 ev_timer_start (EV_A_ &once->to); 2633 ev_timer_start (EV_A_ &once->to);
2287 } 2634 }
2288} 2635}
2289 2636
2637#if EV_MULTIPLICITY
2638 #include "ev_wrap.h"
2639#endif
2640
2290#ifdef __cplusplus 2641#ifdef __cplusplus
2291} 2642}
2292#endif 2643#endif
2293 2644

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