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Comparing libev/ev.c (file contents):
Revision 1.181 by root, Wed Dec 12 00:17:08 2007 UTC vs.
Revision 1.212 by root, Tue Feb 19 19:01:13 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
51# ifndef EV_USE_MONOTONIC 59# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 60# define EV_USE_MONOTONIC 0
53# endif 61# endif
54# ifndef EV_USE_REALTIME 62# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 63# define EV_USE_REALTIME 0
64# endif
65# endif
66
67# ifndef EV_USE_NANOSLEEP
68# if HAVE_NANOSLEEP
69# define EV_USE_NANOSLEEP 1
70# else
71# define EV_USE_NANOSLEEP 0
56# endif 72# endif
57# endif 73# endif
58 74
59# ifndef EV_USE_SELECT 75# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 76# if HAVE_SELECT && HAVE_SYS_SELECT_H
146 162
147#ifndef EV_USE_REALTIME 163#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 164# define EV_USE_REALTIME 0
149#endif 165#endif
150 166
167#ifndef EV_USE_NANOSLEEP
168# define EV_USE_NANOSLEEP 0
169#endif
170
151#ifndef EV_USE_SELECT 171#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 172# define EV_USE_SELECT 1
153#endif 173#endif
154 174
155#ifndef EV_USE_POLL 175#ifndef EV_USE_POLL
202#ifndef CLOCK_REALTIME 222#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 223# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 224# define EV_USE_REALTIME 0
205#endif 225#endif
206 226
227#if !EV_STAT_ENABLE
228# undef EV_USE_INOTIFY
229# define EV_USE_INOTIFY 0
230#endif
231
232#if !EV_USE_NANOSLEEP
233# ifndef _WIN32
234# include <sys/select.h>
235# endif
236#endif
237
238#if EV_USE_INOTIFY
239# include <sys/inotify.h>
240#endif
241
207#if EV_SELECT_IS_WINSOCKET 242#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 243# include <winsock.h>
209#endif
210
211#if !EV_STAT_ENABLE
212# define EV_USE_INOTIFY 0
213#endif
214
215#if EV_USE_INOTIFY
216# include <sys/inotify.h>
217#endif 244#endif
218 245
219/**/ 246/**/
220 247
221/* 248/*
230 257
231#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 258#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) */ 259#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 */ 260/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
234 261
235#if __GNUC__ >= 3 262#if __GNUC__ >= 4
236# define expect(expr,value) __builtin_expect ((expr),(value)) 263# define expect(expr,value) __builtin_expect ((expr),(value))
237# define noinline __attribute__ ((noinline)) 264# define noinline __attribute__ ((noinline))
238#else 265#else
239# define expect(expr,value) (expr) 266# define expect(expr,value) (expr)
240# define noinline 267# define noinline
261 288
262typedef ev_watcher *W; 289typedef ev_watcher *W;
263typedef ev_watcher_list *WL; 290typedef ev_watcher_list *WL;
264typedef ev_watcher_time *WT; 291typedef ev_watcher_time *WT;
265 292
293#if EV_USE_MONOTONIC
294/* sig_atomic_t is used to avoid per-thread variables or locking but still */
295/* giving it a reasonably high chance of working on typical architetcures */
266static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 296static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
297#endif
267 298
268#ifdef _WIN32 299#ifdef _WIN32
269# include "ev_win32.c" 300# include "ev_win32.c"
270#endif 301#endif
271 302
407{ 438{
408 return ev_rt_now; 439 return ev_rt_now;
409} 440}
410#endif 441#endif
411 442
443void
444ev_sleep (ev_tstamp delay)
445{
446 if (delay > 0.)
447 {
448#if EV_USE_NANOSLEEP
449 struct timespec ts;
450
451 ts.tv_sec = (time_t)delay;
452 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
453
454 nanosleep (&ts, 0);
455#elif defined(_WIN32)
456 Sleep (delay * 1e3);
457#else
458 struct timeval tv;
459
460 tv.tv_sec = (time_t)delay;
461 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
462
463 select (0, 0, 0, 0, &tv);
464#endif
465 }
466}
467
468/*****************************************************************************/
469
412int inline_size 470int inline_size
413array_nextsize (int elem, int cur, int cnt) 471array_nextsize (int elem, int cur, int cnt)
414{ 472{
415 int ncur = cur + 1; 473 int ncur = cur + 1;
416 474
533 { 591 {
534 int fd = fdchanges [i]; 592 int fd = fdchanges [i];
535 ANFD *anfd = anfds + fd; 593 ANFD *anfd = anfds + fd;
536 ev_io *w; 594 ev_io *w;
537 595
538 int events = 0; 596 unsigned char events = 0;
539 597
540 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 598 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
541 events |= w->events; 599 events |= (unsigned char)w->events;
542 600
543#if EV_SELECT_IS_WINSOCKET 601#if EV_SELECT_IS_WINSOCKET
544 if (events) 602 if (events)
545 { 603 {
546 unsigned long argp; 604 unsigned long argp;
605 #ifdef EV_FD_TO_WIN32_HANDLE
606 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
607 #else
547 anfd->handle = _get_osfhandle (fd); 608 anfd->handle = _get_osfhandle (fd);
609 #endif
548 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 610 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
549 } 611 }
550#endif 612#endif
551 613
614 {
615 unsigned char o_events = anfd->events;
616 unsigned char o_reify = anfd->reify;
617
552 anfd->reify = 0; 618 anfd->reify = 0;
553
554 backend_modify (EV_A_ fd, anfd->events, events);
555 anfd->events = events; 619 anfd->events = events;
620
621 if (o_events != events || o_reify & EV_IOFDSET)
622 backend_modify (EV_A_ fd, o_events, events);
623 }
556 } 624 }
557 625
558 fdchangecnt = 0; 626 fdchangecnt = 0;
559} 627}
560 628
561void inline_size 629void inline_size
562fd_change (EV_P_ int fd) 630fd_change (EV_P_ int fd, int flags)
563{ 631{
564 if (expect_false (anfds [fd].reify)) 632 unsigned char reify = anfds [fd].reify;
565 return;
566
567 anfds [fd].reify = 1; 633 anfds [fd].reify |= flags;
568 634
635 if (expect_true (!reify))
636 {
569 ++fdchangecnt; 637 ++fdchangecnt;
570 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 638 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
571 fdchanges [fdchangecnt - 1] = fd; 639 fdchanges [fdchangecnt - 1] = fd;
640 }
572} 641}
573 642
574void inline_speed 643void inline_speed
575fd_kill (EV_P_ int fd) 644fd_kill (EV_P_ int fd)
576{ 645{
627 696
628 for (fd = 0; fd < anfdmax; ++fd) 697 for (fd = 0; fd < anfdmax; ++fd)
629 if (anfds [fd].events) 698 if (anfds [fd].events)
630 { 699 {
631 anfds [fd].events = 0; 700 anfds [fd].events = 0;
632 fd_change (EV_A_ fd); 701 fd_change (EV_A_ fd, EV_IOFDSET | 1);
633 } 702 }
634} 703}
635 704
636/*****************************************************************************/ 705/*****************************************************************************/
637 706
694/*****************************************************************************/ 763/*****************************************************************************/
695 764
696typedef struct 765typedef struct
697{ 766{
698 WL head; 767 WL head;
699 sig_atomic_t volatile gotsig; 768 EV_ATOMIC_T gotsig;
700} ANSIG; 769} ANSIG;
701 770
702static ANSIG *signals; 771static ANSIG *signals;
703static int signalmax; 772static int signalmax;
704 773
705static int sigpipe [2]; 774static EV_ATOMIC_T gotsig;
706static sig_atomic_t volatile gotsig;
707static ev_io sigev;
708 775
709void inline_size 776void inline_size
710signals_init (ANSIG *base, int count) 777signals_init (ANSIG *base, int count)
711{ 778{
712 while (count--) 779 while (count--)
716 783
717 ++base; 784 ++base;
718 } 785 }
719} 786}
720 787
721static void 788/*****************************************************************************/
722sighandler (int signum)
723{
724#if _WIN32
725 signal (signum, sighandler);
726#endif
727
728 signals [signum - 1].gotsig = 1;
729
730 if (!gotsig)
731 {
732 int old_errno = errno;
733 gotsig = 1;
734 write (sigpipe [1], &signum, 1);
735 errno = old_errno;
736 }
737}
738
739void noinline
740ev_feed_signal_event (EV_P_ int signum)
741{
742 WL w;
743
744#if EV_MULTIPLICITY
745 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
746#endif
747
748 --signum;
749
750 if (signum < 0 || signum >= signalmax)
751 return;
752
753 signals [signum].gotsig = 0;
754
755 for (w = signals [signum].head; w; w = w->next)
756 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
757}
758
759static void
760sigcb (EV_P_ ev_io *iow, int revents)
761{
762 int signum;
763
764 read (sigpipe [0], &revents, 1);
765 gotsig = 0;
766
767 for (signum = signalmax; signum--; )
768 if (signals [signum].gotsig)
769 ev_feed_signal_event (EV_A_ signum + 1);
770}
771 789
772void inline_speed 790void inline_speed
773fd_intern (int fd) 791fd_intern (int fd)
774{ 792{
775#ifdef _WIN32 793#ifdef _WIN32
780 fcntl (fd, F_SETFL, O_NONBLOCK); 798 fcntl (fd, F_SETFL, O_NONBLOCK);
781#endif 799#endif
782} 800}
783 801
784static void noinline 802static void noinline
785siginit (EV_P) 803evpipe_init (EV_P)
786{ 804{
805 if (!ev_is_active (&pipeev))
806 {
807 while (pipe (evpipe))
808 syserr ("(libev) error creating signal/async pipe");
809
787 fd_intern (sigpipe [0]); 810 fd_intern (evpipe [0]);
788 fd_intern (sigpipe [1]); 811 fd_intern (evpipe [1]);
789 812
790 ev_io_set (&sigev, sigpipe [0], EV_READ); 813 ev_io_set (&pipeev, evpipe [0], EV_READ);
791 ev_io_start (EV_A_ &sigev); 814 ev_io_start (EV_A_ &pipeev);
792 ev_unref (EV_A); /* child watcher should not keep loop alive */ 815 ev_unref (EV_A); /* watcher should not keep loop alive */
816 }
817}
818
819void inline_size
820evpipe_write (EV_P_ int sig, int async)
821{
822 if (!(gotasync || gotsig))
823 {
824 int old_errno = errno; /* save errno becaue write might clobber it */
825
826 if (sig) gotsig = 1;
827 if (async) gotasync = 1;
828
829 write (evpipe [1], &old_errno, 1);
830
831 errno = old_errno;
832 }
833}
834
835static void
836pipecb (EV_P_ ev_io *iow, int revents)
837{
838 {
839 int dummy;
840 read (evpipe [0], &dummy, 1);
841 }
842
843 if (gotsig && ev_is_default_loop (EV_A))
844 {
845 int signum;
846 gotsig = 0;
847
848 for (signum = signalmax; signum--; )
849 if (signals [signum].gotsig)
850 ev_feed_signal_event (EV_A_ signum + 1);
851 }
852
853#if EV_ASYNC_ENABLE
854 if (gotasync)
855 {
856 int i;
857 gotasync = 0;
858
859 for (i = asynccnt; i--; )
860 if (asyncs [i]->sent)
861 {
862 asyncs [i]->sent = 0;
863 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
864 }
865 }
866#endif
793} 867}
794 868
795/*****************************************************************************/ 869/*****************************************************************************/
796 870
871static void
872sighandler (int signum)
873{
874#if EV_MULTIPLICITY
875 struct ev_loop *loop = &default_loop_struct;
876#endif
877
878#if _WIN32
879 signal (signum, sighandler);
880#endif
881
882 signals [signum - 1].gotsig = 1;
883 evpipe_write (EV_A_ 1, 0);
884}
885
886void noinline
887ev_feed_signal_event (EV_P_ int signum)
888{
889 WL w;
890
891#if EV_MULTIPLICITY
892 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
893#endif
894
895 --signum;
896
897 if (signum < 0 || signum >= signalmax)
898 return;
899
900 signals [signum].gotsig = 0;
901
902 for (w = signals [signum].head; w; w = w->next)
903 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
904}
905
906/*****************************************************************************/
907
797static ev_child *childs [EV_PID_HASHSIZE]; 908static WL childs [EV_PID_HASHSIZE];
798 909
799#ifndef _WIN32 910#ifndef _WIN32
800 911
801static ev_signal childev; 912static ev_signal childev;
913
914#ifndef WIFCONTINUED
915# define WIFCONTINUED(status) 0
916#endif
802 917
803void inline_speed 918void inline_speed
804child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 919child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
805{ 920{
806 ev_child *w; 921 ev_child *w;
922 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
807 923
808 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 924 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
925 {
809 if (w->pid == pid || !w->pid) 926 if ((w->pid == pid || !w->pid)
927 && (!traced || (w->flags & 1)))
810 { 928 {
811 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 929 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
812 w->rpid = pid; 930 w->rpid = pid;
813 w->rstatus = status; 931 w->rstatus = status;
814 ev_feed_event (EV_A_ (W)w, EV_CHILD); 932 ev_feed_event (EV_A_ (W)w, EV_CHILD);
815 } 933 }
934 }
816} 935}
817 936
818#ifndef WCONTINUED 937#ifndef WCONTINUED
819# define WCONTINUED 0 938# define WCONTINUED 0
820#endif 939#endif
917} 1036}
918 1037
919unsigned int 1038unsigned int
920ev_embeddable_backends (void) 1039ev_embeddable_backends (void)
921{ 1040{
922 return EVBACKEND_EPOLL 1041 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
923 | EVBACKEND_KQUEUE 1042
924 | EVBACKEND_PORT; 1043 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1044 /* please fix it and tell me how to detect the fix */
1045 flags &= ~EVBACKEND_EPOLL;
1046
1047 return flags;
925} 1048}
926 1049
927unsigned int 1050unsigned int
928ev_backend (EV_P) 1051ev_backend (EV_P)
929{ 1052{
932 1055
933unsigned int 1056unsigned int
934ev_loop_count (EV_P) 1057ev_loop_count (EV_P)
935{ 1058{
936 return loop_count; 1059 return loop_count;
1060}
1061
1062void
1063ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1064{
1065 io_blocktime = interval;
1066}
1067
1068void
1069ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1070{
1071 timeout_blocktime = interval;
937} 1072}
938 1073
939static void noinline 1074static void noinline
940loop_init (EV_P_ unsigned int flags) 1075loop_init (EV_P_ unsigned int flags)
941{ 1076{
947 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1082 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
948 have_monotonic = 1; 1083 have_monotonic = 1;
949 } 1084 }
950#endif 1085#endif
951 1086
952 ev_rt_now = ev_time (); 1087 ev_rt_now = ev_time ();
953 mn_now = get_clock (); 1088 mn_now = get_clock ();
954 now_floor = mn_now; 1089 now_floor = mn_now;
955 rtmn_diff = ev_rt_now - mn_now; 1090 rtmn_diff = ev_rt_now - mn_now;
1091
1092 io_blocktime = 0.;
1093 timeout_blocktime = 0.;
1094 backend = 0;
1095 backend_fd = -1;
1096 gotasync = 0;
1097#if EV_USE_INOTIFY
1098 fs_fd = -2;
1099#endif
956 1100
957 /* pid check not overridable via env */ 1101 /* pid check not overridable via env */
958#ifndef _WIN32 1102#ifndef _WIN32
959 if (flags & EVFLAG_FORKCHECK) 1103 if (flags & EVFLAG_FORKCHECK)
960 curpid = getpid (); 1104 curpid = getpid ();
966 flags = atoi (getenv ("LIBEV_FLAGS")); 1110 flags = atoi (getenv ("LIBEV_FLAGS"));
967 1111
968 if (!(flags & 0x0000ffffUL)) 1112 if (!(flags & 0x0000ffffUL))
969 flags |= ev_recommended_backends (); 1113 flags |= ev_recommended_backends ();
970 1114
971 backend = 0;
972 backend_fd = -1;
973#if EV_USE_INOTIFY
974 fs_fd = -2;
975#endif
976
977#if EV_USE_PORT 1115#if EV_USE_PORT
978 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1116 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
979#endif 1117#endif
980#if EV_USE_KQUEUE 1118#if EV_USE_KQUEUE
981 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1119 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
988#endif 1126#endif
989#if EV_USE_SELECT 1127#if EV_USE_SELECT
990 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1128 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
991#endif 1129#endif
992 1130
993 ev_init (&sigev, sigcb); 1131 ev_init (&pipeev, pipecb);
994 ev_set_priority (&sigev, EV_MAXPRI); 1132 ev_set_priority (&pipeev, EV_MAXPRI);
995 } 1133 }
996} 1134}
997 1135
998static void noinline 1136static void noinline
999loop_destroy (EV_P) 1137loop_destroy (EV_P)
1000{ 1138{
1001 int i; 1139 int i;
1140
1141 if (ev_is_active (&pipeev))
1142 {
1143 ev_ref (EV_A); /* signal watcher */
1144 ev_io_stop (EV_A_ &pipeev);
1145
1146 close (evpipe [0]); evpipe [0] = 0;
1147 close (evpipe [1]); evpipe [1] = 0;
1148 }
1002 1149
1003#if EV_USE_INOTIFY 1150#if EV_USE_INOTIFY
1004 if (fs_fd >= 0) 1151 if (fs_fd >= 0)
1005 close (fs_fd); 1152 close (fs_fd);
1006#endif 1153#endif
1029 array_free (pending, [i]); 1176 array_free (pending, [i]);
1030#if EV_IDLE_ENABLE 1177#if EV_IDLE_ENABLE
1031 array_free (idle, [i]); 1178 array_free (idle, [i]);
1032#endif 1179#endif
1033 } 1180 }
1181
1182 ev_free (anfds); anfdmax = 0;
1034 1183
1035 /* have to use the microsoft-never-gets-it-right macro */ 1184 /* have to use the microsoft-never-gets-it-right macro */
1036 array_free (fdchange, EMPTY); 1185 array_free (fdchange, EMPTY);
1037 array_free (timer, EMPTY); 1186 array_free (timer, EMPTY);
1038#if EV_PERIODIC_ENABLE 1187#if EV_PERIODIC_ENABLE
1039 array_free (periodic, EMPTY); 1188 array_free (periodic, EMPTY);
1040#endif 1189#endif
1190#if EV_FORK_ENABLE
1191 array_free (fork, EMPTY);
1192#endif
1041 array_free (prepare, EMPTY); 1193 array_free (prepare, EMPTY);
1042 array_free (check, EMPTY); 1194 array_free (check, EMPTY);
1195#if EV_ASYNC_ENABLE
1196 array_free (async, EMPTY);
1197#endif
1043 1198
1044 backend = 0; 1199 backend = 0;
1045} 1200}
1046 1201
1047void inline_size infy_fork (EV_P); 1202void inline_size infy_fork (EV_P);
1060#endif 1215#endif
1061#if EV_USE_INOTIFY 1216#if EV_USE_INOTIFY
1062 infy_fork (EV_A); 1217 infy_fork (EV_A);
1063#endif 1218#endif
1064 1219
1065 if (ev_is_active (&sigev)) 1220 if (ev_is_active (&pipeev))
1066 { 1221 {
1067 /* default loop */ 1222 /* this "locks" the handlers against writing to the pipe */
1223 /* while we modify the fd vars */
1224 gotsig = 1;
1225#if EV_ASYNC_ENABLE
1226 gotasync = 1;
1227#endif
1068 1228
1069 ev_ref (EV_A); 1229 ev_ref (EV_A);
1070 ev_io_stop (EV_A_ &sigev); 1230 ev_io_stop (EV_A_ &pipeev);
1071 close (sigpipe [0]); 1231 close (evpipe [0]);
1072 close (sigpipe [1]); 1232 close (evpipe [1]);
1073 1233
1074 while (pipe (sigpipe))
1075 syserr ("(libev) error creating pipe");
1076
1077 siginit (EV_A); 1234 evpipe_init (EV_A);
1235 /* now iterate over everything, in case we missed something */
1236 pipecb (EV_A_ &pipeev, EV_READ);
1078 } 1237 }
1079 1238
1080 postfork = 0; 1239 postfork = 0;
1081} 1240}
1082 1241
1104} 1263}
1105 1264
1106void 1265void
1107ev_loop_fork (EV_P) 1266ev_loop_fork (EV_P)
1108{ 1267{
1109 postfork = 1; 1268 postfork = 1; /* must be in line with ev_default_fork */
1110} 1269}
1111 1270
1112#endif 1271#endif
1113 1272
1114#if EV_MULTIPLICITY 1273#if EV_MULTIPLICITY
1117#else 1276#else
1118int 1277int
1119ev_default_loop (unsigned int flags) 1278ev_default_loop (unsigned int flags)
1120#endif 1279#endif
1121{ 1280{
1122 if (sigpipe [0] == sigpipe [1])
1123 if (pipe (sigpipe))
1124 return 0;
1125
1126 if (!ev_default_loop_ptr) 1281 if (!ev_default_loop_ptr)
1127 { 1282 {
1128#if EV_MULTIPLICITY 1283#if EV_MULTIPLICITY
1129 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1284 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1130#else 1285#else
1133 1288
1134 loop_init (EV_A_ flags); 1289 loop_init (EV_A_ flags);
1135 1290
1136 if (ev_backend (EV_A)) 1291 if (ev_backend (EV_A))
1137 { 1292 {
1138 siginit (EV_A);
1139
1140#ifndef _WIN32 1293#ifndef _WIN32
1141 ev_signal_init (&childev, childcb, SIGCHLD); 1294 ev_signal_init (&childev, childcb, SIGCHLD);
1142 ev_set_priority (&childev, EV_MAXPRI); 1295 ev_set_priority (&childev, EV_MAXPRI);
1143 ev_signal_start (EV_A_ &childev); 1296 ev_signal_start (EV_A_ &childev);
1144 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1297 ev_unref (EV_A); /* child watcher should not keep loop alive */
1161#ifndef _WIN32 1314#ifndef _WIN32
1162 ev_ref (EV_A); /* child watcher */ 1315 ev_ref (EV_A); /* child watcher */
1163 ev_signal_stop (EV_A_ &childev); 1316 ev_signal_stop (EV_A_ &childev);
1164#endif 1317#endif
1165 1318
1166 ev_ref (EV_A); /* signal watcher */
1167 ev_io_stop (EV_A_ &sigev);
1168
1169 close (sigpipe [0]); sigpipe [0] = 0;
1170 close (sigpipe [1]); sigpipe [1] = 0;
1171
1172 loop_destroy (EV_A); 1319 loop_destroy (EV_A);
1173} 1320}
1174 1321
1175void 1322void
1176ev_default_fork (void) 1323ev_default_fork (void)
1178#if EV_MULTIPLICITY 1325#if EV_MULTIPLICITY
1179 struct ev_loop *loop = ev_default_loop_ptr; 1326 struct ev_loop *loop = ev_default_loop_ptr;
1180#endif 1327#endif
1181 1328
1182 if (backend) 1329 if (backend)
1183 postfork = 1; 1330 postfork = 1; /* must be in line with ev_loop_fork */
1184} 1331}
1185 1332
1186/*****************************************************************************/ 1333/*****************************************************************************/
1187 1334
1188void 1335void
1443 /* update fd-related kernel structures */ 1590 /* update fd-related kernel structures */
1444 fd_reify (EV_A); 1591 fd_reify (EV_A);
1445 1592
1446 /* calculate blocking time */ 1593 /* calculate blocking time */
1447 { 1594 {
1448 ev_tstamp block; 1595 ev_tstamp waittime = 0.;
1596 ev_tstamp sleeptime = 0.;
1449 1597
1450 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 1598 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1451 block = 0.; /* do not block at all */
1452 else
1453 { 1599 {
1454 /* update time to cancel out callback processing overhead */ 1600 /* update time to cancel out callback processing overhead */
1455 time_update (EV_A_ 1e100); 1601 time_update (EV_A_ 1e100);
1456 1602
1457 block = MAX_BLOCKTIME; 1603 waittime = MAX_BLOCKTIME;
1458 1604
1459 if (timercnt) 1605 if (timercnt)
1460 { 1606 {
1461 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 1607 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1462 if (block > to) block = to; 1608 if (waittime > to) waittime = to;
1463 } 1609 }
1464 1610
1465#if EV_PERIODIC_ENABLE 1611#if EV_PERIODIC_ENABLE
1466 if (periodiccnt) 1612 if (periodiccnt)
1467 { 1613 {
1468 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 1614 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1469 if (block > to) block = to; 1615 if (waittime > to) waittime = to;
1470 } 1616 }
1471#endif 1617#endif
1472 1618
1473 if (expect_false (block < 0.)) block = 0.; 1619 if (expect_false (waittime < timeout_blocktime))
1620 waittime = timeout_blocktime;
1621
1622 sleeptime = waittime - backend_fudge;
1623
1624 if (expect_true (sleeptime > io_blocktime))
1625 sleeptime = io_blocktime;
1626
1627 if (sleeptime)
1628 {
1629 ev_sleep (sleeptime);
1630 waittime -= sleeptime;
1631 }
1474 } 1632 }
1475 1633
1476 ++loop_count; 1634 ++loop_count;
1477 backend_poll (EV_A_ block); 1635 backend_poll (EV_A_ waittime);
1478 1636
1479 /* update ev_rt_now, do magic */ 1637 /* update ev_rt_now, do magic */
1480 time_update (EV_A_ block); 1638 time_update (EV_A_ waittime + sleeptime);
1481 } 1639 }
1482 1640
1483 /* queue pending timers and reschedule them */ 1641 /* queue pending timers and reschedule them */
1484 timers_reify (EV_A); /* relative timers called last */ 1642 timers_reify (EV_A); /* relative timers called last */
1485#if EV_PERIODIC_ENABLE 1643#if EV_PERIODIC_ENABLE
1597 1755
1598 assert (("ev_io_start called with negative fd", fd >= 0)); 1756 assert (("ev_io_start called with negative fd", fd >= 0));
1599 1757
1600 ev_start (EV_A_ (W)w, 1); 1758 ev_start (EV_A_ (W)w, 1);
1601 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 1759 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1602 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1760 wlist_add (&anfds[fd].head, (WL)w);
1603 1761
1604 fd_change (EV_A_ fd); 1762 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1763 w->events &= ~EV_IOFDSET;
1605} 1764}
1606 1765
1607void noinline 1766void noinline
1608ev_io_stop (EV_P_ ev_io *w) 1767ev_io_stop (EV_P_ ev_io *w)
1609{ 1768{
1611 if (expect_false (!ev_is_active (w))) 1770 if (expect_false (!ev_is_active (w)))
1612 return; 1771 return;
1613 1772
1614 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 1773 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1615 1774
1616 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1775 wlist_del (&anfds[w->fd].head, (WL)w);
1617 ev_stop (EV_A_ (W)w); 1776 ev_stop (EV_A_ (W)w);
1618 1777
1619 fd_change (EV_A_ w->fd); 1778 fd_change (EV_A_ w->fd, 1);
1620} 1779}
1621 1780
1622void noinline 1781void noinline
1623ev_timer_start (EV_P_ ev_timer *w) 1782ev_timer_start (EV_P_ ev_timer *w)
1624{ 1783{
1751 if (expect_false (ev_is_active (w))) 1910 if (expect_false (ev_is_active (w)))
1752 return; 1911 return;
1753 1912
1754 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 1913 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1755 1914
1915 evpipe_init (EV_A);
1916
1756 { 1917 {
1757#ifndef _WIN32 1918#ifndef _WIN32
1758 sigset_t full, prev; 1919 sigset_t full, prev;
1759 sigfillset (&full); 1920 sigfillset (&full);
1760 sigprocmask (SIG_SETMASK, &full, &prev); 1921 sigprocmask (SIG_SETMASK, &full, &prev);
1766 sigprocmask (SIG_SETMASK, &prev, 0); 1927 sigprocmask (SIG_SETMASK, &prev, 0);
1767#endif 1928#endif
1768 } 1929 }
1769 1930
1770 ev_start (EV_A_ (W)w, 1); 1931 ev_start (EV_A_ (W)w, 1);
1771 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 1932 wlist_add (&signals [w->signum - 1].head, (WL)w);
1772 1933
1773 if (!((WL)w)->next) 1934 if (!((WL)w)->next)
1774 { 1935 {
1775#if _WIN32 1936#if _WIN32
1776 signal (w->signum, sighandler); 1937 signal (w->signum, sighandler);
1789{ 1950{
1790 clear_pending (EV_A_ (W)w); 1951 clear_pending (EV_A_ (W)w);
1791 if (expect_false (!ev_is_active (w))) 1952 if (expect_false (!ev_is_active (w)))
1792 return; 1953 return;
1793 1954
1794 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 1955 wlist_del (&signals [w->signum - 1].head, (WL)w);
1795 ev_stop (EV_A_ (W)w); 1956 ev_stop (EV_A_ (W)w);
1796 1957
1797 if (!signals [w->signum - 1].head) 1958 if (!signals [w->signum - 1].head)
1798 signal (w->signum, SIG_DFL); 1959 signal (w->signum, SIG_DFL);
1799} 1960}
1806#endif 1967#endif
1807 if (expect_false (ev_is_active (w))) 1968 if (expect_false (ev_is_active (w)))
1808 return; 1969 return;
1809 1970
1810 ev_start (EV_A_ (W)w, 1); 1971 ev_start (EV_A_ (W)w, 1);
1811 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 1972 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1812} 1973}
1813 1974
1814void 1975void
1815ev_child_stop (EV_P_ ev_child *w) 1976ev_child_stop (EV_P_ ev_child *w)
1816{ 1977{
1817 clear_pending (EV_A_ (W)w); 1978 clear_pending (EV_A_ (W)w);
1818 if (expect_false (!ev_is_active (w))) 1979 if (expect_false (!ev_is_active (w)))
1819 return; 1980 return;
1820 1981
1821 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 1982 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1822 ev_stop (EV_A_ (W)w); 1983 ev_stop (EV_A_ (W)w);
1823} 1984}
1824 1985
1825#if EV_STAT_ENABLE 1986#if EV_STAT_ENABLE
1826 1987
2168 2329
2169#if EV_EMBED_ENABLE 2330#if EV_EMBED_ENABLE
2170void noinline 2331void noinline
2171ev_embed_sweep (EV_P_ ev_embed *w) 2332ev_embed_sweep (EV_P_ ev_embed *w)
2172{ 2333{
2173 ev_loop (w->loop, EVLOOP_NONBLOCK); 2334 ev_loop (w->other, EVLOOP_NONBLOCK);
2174} 2335}
2175 2336
2176static void 2337static void
2177embed_cb (EV_P_ ev_io *io, int revents) 2338embed_io_cb (EV_P_ ev_io *io, int revents)
2178{ 2339{
2179 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 2340 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2180 2341
2181 if (ev_cb (w)) 2342 if (ev_cb (w))
2182 ev_feed_event (EV_A_ (W)w, EV_EMBED); 2343 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2183 else 2344 else
2184 ev_embed_sweep (loop, w); 2345 ev_loop (w->other, EVLOOP_NONBLOCK);
2185} 2346}
2347
2348static void
2349embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2350{
2351 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2352
2353 {
2354 struct ev_loop *loop = w->other;
2355
2356 while (fdchangecnt)
2357 {
2358 fd_reify (EV_A);
2359 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2360 }
2361 }
2362}
2363
2364#if 0
2365static void
2366embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2367{
2368 ev_idle_stop (EV_A_ idle);
2369}
2370#endif
2186 2371
2187void 2372void
2188ev_embed_start (EV_P_ ev_embed *w) 2373ev_embed_start (EV_P_ ev_embed *w)
2189{ 2374{
2190 if (expect_false (ev_is_active (w))) 2375 if (expect_false (ev_is_active (w)))
2191 return; 2376 return;
2192 2377
2193 { 2378 {
2194 struct ev_loop *loop = w->loop; 2379 struct ev_loop *loop = w->other;
2195 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 2380 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2196 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 2381 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2197 } 2382 }
2198 2383
2199 ev_set_priority (&w->io, ev_priority (w)); 2384 ev_set_priority (&w->io, ev_priority (w));
2200 ev_io_start (EV_A_ &w->io); 2385 ev_io_start (EV_A_ &w->io);
2201 2386
2387 ev_prepare_init (&w->prepare, embed_prepare_cb);
2388 ev_set_priority (&w->prepare, EV_MINPRI);
2389 ev_prepare_start (EV_A_ &w->prepare);
2390
2391 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2392
2202 ev_start (EV_A_ (W)w, 1); 2393 ev_start (EV_A_ (W)w, 1);
2203} 2394}
2204 2395
2205void 2396void
2206ev_embed_stop (EV_P_ ev_embed *w) 2397ev_embed_stop (EV_P_ ev_embed *w)
2208 clear_pending (EV_A_ (W)w); 2399 clear_pending (EV_A_ (W)w);
2209 if (expect_false (!ev_is_active (w))) 2400 if (expect_false (!ev_is_active (w)))
2210 return; 2401 return;
2211 2402
2212 ev_io_stop (EV_A_ &w->io); 2403 ev_io_stop (EV_A_ &w->io);
2404 ev_prepare_stop (EV_A_ &w->prepare);
2213 2405
2214 ev_stop (EV_A_ (W)w); 2406 ev_stop (EV_A_ (W)w);
2215} 2407}
2216#endif 2408#endif
2217 2409
2242 2434
2243 ev_stop (EV_A_ (W)w); 2435 ev_stop (EV_A_ (W)w);
2244} 2436}
2245#endif 2437#endif
2246 2438
2439#if EV_ASYNC_ENABLE
2440void
2441ev_async_start (EV_P_ ev_async *w)
2442{
2443 if (expect_false (ev_is_active (w)))
2444 return;
2445
2446 evpipe_init (EV_A);
2447
2448 ev_start (EV_A_ (W)w, ++asynccnt);
2449 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2450 asyncs [asynccnt - 1] = w;
2451}
2452
2453void
2454ev_async_stop (EV_P_ ev_async *w)
2455{
2456 clear_pending (EV_A_ (W)w);
2457 if (expect_false (!ev_is_active (w)))
2458 return;
2459
2460 {
2461 int active = ((W)w)->active;
2462 asyncs [active - 1] = asyncs [--asynccnt];
2463 ((W)asyncs [active - 1])->active = active;
2464 }
2465
2466 ev_stop (EV_A_ (W)w);
2467}
2468
2469void
2470ev_async_send (EV_P_ ev_async *w)
2471{
2472 w->sent = 1;
2473 evpipe_write (EV_A_ 0, 1);
2474}
2475#endif
2476
2247/*****************************************************************************/ 2477/*****************************************************************************/
2248 2478
2249struct ev_once 2479struct ev_once
2250{ 2480{
2251 ev_io io; 2481 ev_io io;
2306 ev_timer_set (&once->to, timeout, 0.); 2536 ev_timer_set (&once->to, timeout, 0.);
2307 ev_timer_start (EV_A_ &once->to); 2537 ev_timer_start (EV_A_ &once->to);
2308 } 2538 }
2309} 2539}
2310 2540
2541#if EV_MULTIPLICITY
2542 #include "ev_wrap.h"
2543#endif
2544
2311#ifdef __cplusplus 2545#ifdef __cplusplus
2312} 2546}
2313#endif 2547#endif
2314 2548

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