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Comparing libev/ev.c (file contents):
Revision 1.190 by root, Fri Dec 21 01:26:04 2007 UTC vs.
Revision 1.222 by root, Sun Apr 6 12:45:58 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
… …
207#if !EV_STAT_ENABLE 252#if !EV_STAT_ENABLE
208# undef EV_USE_INOTIFY 253# undef EV_USE_INOTIFY
209# define EV_USE_INOTIFY 0 254# define EV_USE_INOTIFY 0
210#endif 255#endif
211 256
257#if !EV_USE_NANOSLEEP
258# ifndef _WIN32
259# include <sys/select.h>
260# endif
261#endif
262
212#if EV_USE_INOTIFY 263#if EV_USE_INOTIFY
213# include <sys/inotify.h> 264# include <sys/inotify.h>
214#endif 265#endif
215 266
216#if EV_SELECT_IS_WINSOCKET 267#if EV_SELECT_IS_WINSOCKET
217# include <winsock.h> 268# include <winsock.h>
269#endif
270
271#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h>
274# ifdef __cplusplus
275extern "C" {
276# endif
277int eventfd (unsigned int initval, int flags);
278# ifdef __cplusplus
279}
280# endif
218#endif 281#endif
219 282
220/**/ 283/**/
221 284
222/* 285/*
… …
262 325
263typedef ev_watcher *W; 326typedef ev_watcher *W;
264typedef ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
265typedef ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
266 329
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 */
267static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 333static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
334#endif
268 335
269#ifdef _WIN32 336#ifdef _WIN32
270# include "ev_win32.c" 337# include "ev_win32.c"
271#endif 338#endif
272 339
… …
408{ 475{
409 return ev_rt_now; 476 return ev_rt_now;
410} 477}
411#endif 478#endif
412 479
480void
481ev_sleep (ev_tstamp delay)
482{
483 if (delay > 0.)
484 {
485#if EV_USE_NANOSLEEP
486 struct timespec ts;
487
488 ts.tv_sec = (time_t)delay;
489 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
490
491 nanosleep (&ts, 0);
492#elif defined(_WIN32)
493 Sleep ((unsigned long)(delay * 1e3));
494#else
495 struct timeval tv;
496
497 tv.tv_sec = (time_t)delay;
498 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
499
500 select (0, 0, 0, 0, &tv);
501#endif
502 }
503}
504
505/*****************************************************************************/
506
413int inline_size 507int inline_size
414array_nextsize (int elem, int cur, int cnt) 508array_nextsize (int elem, int cur, int cnt)
415{ 509{
416 int ncur = cur + 1; 510 int ncur = cur + 1;
417 511
… …
543 637
544#if EV_SELECT_IS_WINSOCKET 638#if EV_SELECT_IS_WINSOCKET
545 if (events) 639 if (events)
546 { 640 {
547 unsigned long argp; 641 unsigned long argp;
642 #ifdef EV_FD_TO_WIN32_HANDLE
643 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
644 #else
548 anfd->handle = _get_osfhandle (fd); 645 anfd->handle = _get_osfhandle (fd);
646 #endif
549 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 647 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
550 } 648 }
551#endif 649#endif
552 650
553 { 651 {
… …
702/*****************************************************************************/ 800/*****************************************************************************/
703 801
704typedef struct 802typedef struct
705{ 803{
706 WL head; 804 WL head;
707 sig_atomic_t volatile gotsig; 805 EV_ATOMIC_T gotsig;
708} ANSIG; 806} ANSIG;
709 807
710static ANSIG *signals; 808static ANSIG *signals;
711static int signalmax; 809static int signalmax;
712 810
713static int sigpipe [2]; 811static EV_ATOMIC_T gotsig;
714static sig_atomic_t volatile gotsig;
715static ev_io sigev;
716 812
717void inline_size 813void inline_size
718signals_init (ANSIG *base, int count) 814signals_init (ANSIG *base, int count)
719{ 815{
720 while (count--) 816 while (count--)
… …
724 820
725 ++base; 821 ++base;
726 } 822 }
727} 823}
728 824
729static void 825/*****************************************************************************/
730sighandler (int signum)
731{
732#if _WIN32
733 signal (signum, sighandler);
734#endif
735
736 signals [signum - 1].gotsig = 1;
737
738 if (!gotsig)
739 {
740 int old_errno = errno;
741 gotsig = 1;
742 write (sigpipe [1], &signum, 1);
743 errno = old_errno;
744 }
745}
746
747void noinline
748ev_feed_signal_event (EV_P_ int signum)
749{
750 WL w;
751
752#if EV_MULTIPLICITY
753 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
754#endif
755
756 --signum;
757
758 if (signum < 0 || signum >= signalmax)
759 return;
760
761 signals [signum].gotsig = 0;
762
763 for (w = signals [signum].head; w; w = w->next)
764 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
765}
766
767static void
768sigcb (EV_P_ ev_io *iow, int revents)
769{
770 int signum;
771
772 read (sigpipe [0], &revents, 1);
773 gotsig = 0;
774
775 for (signum = signalmax; signum--; )
776 if (signals [signum].gotsig)
777 ev_feed_signal_event (EV_A_ signum + 1);
778}
779 826
780void inline_speed 827void inline_speed
781fd_intern (int fd) 828fd_intern (int fd)
782{ 829{
783#ifdef _WIN32 830#ifdef _WIN32
… …
788 fcntl (fd, F_SETFL, O_NONBLOCK); 835 fcntl (fd, F_SETFL, O_NONBLOCK);
789#endif 836#endif
790} 837}
791 838
792static void noinline 839static void noinline
793siginit (EV_P) 840evpipe_init (EV_P)
794{ 841{
842 if (!ev_is_active (&pipeev))
843 {
844#if EV_USE_EVENTFD
845 if ((evfd = eventfd (0, 0)) >= 0)
846 {
847 evpipe [0] = -1;
848 fd_intern (evfd);
849 ev_io_set (&pipeev, evfd, EV_READ);
850 }
851 else
852#endif
853 {
854 while (pipe (evpipe))
855 syserr ("(libev) error creating signal/async pipe");
856
795 fd_intern (sigpipe [0]); 857 fd_intern (evpipe [0]);
796 fd_intern (sigpipe [1]); 858 fd_intern (evpipe [1]);
859 ev_io_set (&pipeev, evpipe [0], EV_READ);
860 }
797 861
798 ev_io_set (&sigev, sigpipe [0], EV_READ);
799 ev_io_start (EV_A_ &sigev); 862 ev_io_start (EV_A_ &pipeev);
800 ev_unref (EV_A); /* child watcher should not keep loop alive */ 863 ev_unref (EV_A); /* watcher should not keep loop alive */
864 }
865}
866
867void inline_size
868evpipe_write (EV_P_ EV_ATOMIC_T *flag)
869{
870 if (!*flag)
871 {
872 int old_errno = errno; /* save errno because write might clobber it */
873
874 *flag = 1;
875
876#if EV_USE_EVENTFD
877 if (evfd >= 0)
878 {
879 uint64_t counter = 1;
880 write (evfd, &counter, sizeof (uint64_t));
881 }
882 else
883#endif
884 write (evpipe [1], &old_errno, 1);
885
886 errno = old_errno;
887 }
888}
889
890static void
891pipecb (EV_P_ ev_io *iow, int revents)
892{
893#if EV_USE_EVENTFD
894 if (evfd >= 0)
895 {
896 uint64_t counter = 1;
897 read (evfd, &counter, sizeof (uint64_t));
898 }
899 else
900#endif
901 {
902 char dummy;
903 read (evpipe [0], &dummy, 1);
904 }
905
906 if (gotsig && ev_is_default_loop (EV_A))
907 {
908 int signum;
909 gotsig = 0;
910
911 for (signum = signalmax; signum--; )
912 if (signals [signum].gotsig)
913 ev_feed_signal_event (EV_A_ signum + 1);
914 }
915
916#if EV_ASYNC_ENABLE
917 if (gotasync)
918 {
919 int i;
920 gotasync = 0;
921
922 for (i = asynccnt; i--; )
923 if (asyncs [i]->sent)
924 {
925 asyncs [i]->sent = 0;
926 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
927 }
928 }
929#endif
801} 930}
802 931
803/*****************************************************************************/ 932/*****************************************************************************/
804 933
934static void
935ev_sighandler (int signum)
936{
937#if EV_MULTIPLICITY
938 struct ev_loop *loop = &default_loop_struct;
939#endif
940
941#if _WIN32
942 signal (signum, ev_sighandler);
943#endif
944
945 signals [signum - 1].gotsig = 1;
946 evpipe_write (EV_A_ &gotsig);
947}
948
949void noinline
950ev_feed_signal_event (EV_P_ int signum)
951{
952 WL w;
953
954#if EV_MULTIPLICITY
955 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
956#endif
957
958 --signum;
959
960 if (signum < 0 || signum >= signalmax)
961 return;
962
963 signals [signum].gotsig = 0;
964
965 for (w = signals [signum].head; w; w = w->next)
966 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
967}
968
969/*****************************************************************************/
970
805static WL childs [EV_PID_HASHSIZE]; 971static WL childs [EV_PID_HASHSIZE];
806 972
807#ifndef _WIN32 973#ifndef _WIN32
808 974
809static ev_signal childev; 975static ev_signal childev;
810 976
977#ifndef WIFCONTINUED
978# define WIFCONTINUED(status) 0
979#endif
980
811void inline_speed 981void inline_speed
812child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 982child_reap (EV_P_ int chain, int pid, int status)
813{ 983{
814 ev_child *w; 984 ev_child *w;
985 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
815 986
816 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 987 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
988 {
817 if (w->pid == pid || !w->pid) 989 if ((w->pid == pid || !w->pid)
990 && (!traced || (w->flags & 1)))
818 { 991 {
819 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 992 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
820 w->rpid = pid; 993 w->rpid = pid;
821 w->rstatus = status; 994 w->rstatus = status;
822 ev_feed_event (EV_A_ (W)w, EV_CHILD); 995 ev_feed_event (EV_A_ (W)w, EV_CHILD);
823 } 996 }
997 }
824} 998}
825 999
826#ifndef WCONTINUED 1000#ifndef WCONTINUED
827# define WCONTINUED 0 1001# define WCONTINUED 0
828#endif 1002#endif
… …
837 if (!WCONTINUED 1011 if (!WCONTINUED
838 || errno != EINVAL 1012 || errno != EINVAL
839 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1013 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
840 return; 1014 return;
841 1015
842 /* make sure we are called again until all childs have been reaped */ 1016 /* make sure we are called again until all children have been reaped */
843 /* we need to do it this way so that the callback gets called before we continue */ 1017 /* we need to do it this way so that the callback gets called before we continue */
844 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1018 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
845 1019
846 child_reap (EV_A_ sw, pid, pid, status); 1020 child_reap (EV_A_ pid, pid, status);
847 if (EV_PID_HASHSIZE > 1) 1021 if (EV_PID_HASHSIZE > 1)
848 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1022 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
849} 1023}
850 1024
851#endif 1025#endif
852 1026
853/*****************************************************************************/ 1027/*****************************************************************************/
… …
925} 1099}
926 1100
927unsigned int 1101unsigned int
928ev_embeddable_backends (void) 1102ev_embeddable_backends (void)
929{ 1103{
930 return EVBACKEND_EPOLL 1104 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
931 | EVBACKEND_KQUEUE 1105
932 | EVBACKEND_PORT; 1106 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1107 /* please fix it and tell me how to detect the fix */
1108 flags &= ~EVBACKEND_EPOLL;
1109
1110 return flags;
933} 1111}
934 1112
935unsigned int 1113unsigned int
936ev_backend (EV_P) 1114ev_backend (EV_P)
937{ 1115{
… …
940 1118
941unsigned int 1119unsigned int
942ev_loop_count (EV_P) 1120ev_loop_count (EV_P)
943{ 1121{
944 return loop_count; 1122 return loop_count;
1123}
1124
1125void
1126ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1127{
1128 io_blocktime = interval;
1129}
1130
1131void
1132ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1133{
1134 timeout_blocktime = interval;
945} 1135}
946 1136
947static void noinline 1137static void noinline
948loop_init (EV_P_ unsigned int flags) 1138loop_init (EV_P_ unsigned int flags)
949{ 1139{
… …
955 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1145 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
956 have_monotonic = 1; 1146 have_monotonic = 1;
957 } 1147 }
958#endif 1148#endif
959 1149
960 ev_rt_now = ev_time (); 1150 ev_rt_now = ev_time ();
961 mn_now = get_clock (); 1151 mn_now = get_clock ();
962 now_floor = mn_now; 1152 now_floor = mn_now;
963 rtmn_diff = ev_rt_now - mn_now; 1153 rtmn_diff = ev_rt_now - mn_now;
1154
1155 io_blocktime = 0.;
1156 timeout_blocktime = 0.;
1157 backend = 0;
1158 backend_fd = -1;
1159 gotasync = 0;
1160#if EV_USE_INOTIFY
1161 fs_fd = -2;
1162#endif
964 1163
965 /* pid check not overridable via env */ 1164 /* pid check not overridable via env */
966#ifndef _WIN32 1165#ifndef _WIN32
967 if (flags & EVFLAG_FORKCHECK) 1166 if (flags & EVFLAG_FORKCHECK)
968 curpid = getpid (); 1167 curpid = getpid ();
… …
974 flags = atoi (getenv ("LIBEV_FLAGS")); 1173 flags = atoi (getenv ("LIBEV_FLAGS"));
975 1174
976 if (!(flags & 0x0000ffffUL)) 1175 if (!(flags & 0x0000ffffUL))
977 flags |= ev_recommended_backends (); 1176 flags |= ev_recommended_backends ();
978 1177
979 backend = 0;
980 backend_fd = -1;
981#if EV_USE_INOTIFY
982 fs_fd = -2;
983#endif
984
985#if EV_USE_PORT 1178#if EV_USE_PORT
986 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1179 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
987#endif 1180#endif
988#if EV_USE_KQUEUE 1181#if EV_USE_KQUEUE
989 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1182 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
996#endif 1189#endif
997#if EV_USE_SELECT 1190#if EV_USE_SELECT
998 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1191 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
999#endif 1192#endif
1000 1193
1001 ev_init (&sigev, sigcb); 1194 ev_init (&pipeev, pipecb);
1002 ev_set_priority (&sigev, EV_MAXPRI); 1195 ev_set_priority (&pipeev, EV_MAXPRI);
1003 } 1196 }
1004} 1197}
1005 1198
1006static void noinline 1199static void noinline
1007loop_destroy (EV_P) 1200loop_destroy (EV_P)
1008{ 1201{
1009 int i; 1202 int i;
1203
1204 if (ev_is_active (&pipeev))
1205 {
1206 ev_ref (EV_A); /* signal watcher */
1207 ev_io_stop (EV_A_ &pipeev);
1208
1209#if EV_USE_EVENTFD
1210 if (evfd >= 0)
1211 close (evfd);
1212#endif
1213
1214 if (evpipe [0] >= 0)
1215 {
1216 close (evpipe [0]);
1217 close (evpipe [1]);
1218 }
1219 }
1010 1220
1011#if EV_USE_INOTIFY 1221#if EV_USE_INOTIFY
1012 if (fs_fd >= 0) 1222 if (fs_fd >= 0)
1013 close (fs_fd); 1223 close (fs_fd);
1014#endif 1224#endif
… …
1051#if EV_FORK_ENABLE 1261#if EV_FORK_ENABLE
1052 array_free (fork, EMPTY); 1262 array_free (fork, EMPTY);
1053#endif 1263#endif
1054 array_free (prepare, EMPTY); 1264 array_free (prepare, EMPTY);
1055 array_free (check, EMPTY); 1265 array_free (check, EMPTY);
1266#if EV_ASYNC_ENABLE
1267 array_free (async, EMPTY);
1268#endif
1056 1269
1057 backend = 0; 1270 backend = 0;
1058} 1271}
1059 1272
1060void inline_size infy_fork (EV_P); 1273void inline_size infy_fork (EV_P);
… …
1073#endif 1286#endif
1074#if EV_USE_INOTIFY 1287#if EV_USE_INOTIFY
1075 infy_fork (EV_A); 1288 infy_fork (EV_A);
1076#endif 1289#endif
1077 1290
1078 if (ev_is_active (&sigev)) 1291 if (ev_is_active (&pipeev))
1079 { 1292 {
1080 /* default loop */ 1293 /* this "locks" the handlers against writing to the pipe */
1294 /* while we modify the fd vars */
1295 gotsig = 1;
1296#if EV_ASYNC_ENABLE
1297 gotasync = 1;
1298#endif
1081 1299
1082 ev_ref (EV_A); 1300 ev_ref (EV_A);
1083 ev_io_stop (EV_A_ &sigev); 1301 ev_io_stop (EV_A_ &pipeev);
1302
1303#if EV_USE_EVENTFD
1304 if (evfd >= 0)
1305 close (evfd);
1306#endif
1307
1308 if (evpipe [0] >= 0)
1309 {
1084 close (sigpipe [0]); 1310 close (evpipe [0]);
1085 close (sigpipe [1]); 1311 close (evpipe [1]);
1312 }
1086 1313
1087 while (pipe (sigpipe))
1088 syserr ("(libev) error creating pipe");
1089
1090 siginit (EV_A); 1314 evpipe_init (EV_A);
1315 /* now iterate over everything, in case we missed something */
1316 pipecb (EV_A_ &pipeev, EV_READ);
1091 } 1317 }
1092 1318
1093 postfork = 0; 1319 postfork = 0;
1094} 1320}
1095 1321
… …
1117} 1343}
1118 1344
1119void 1345void
1120ev_loop_fork (EV_P) 1346ev_loop_fork (EV_P)
1121{ 1347{
1122 postfork = 1; 1348 postfork = 1; /* must be in line with ev_default_fork */
1123} 1349}
1124 1350
1125#endif 1351#endif
1126 1352
1127#if EV_MULTIPLICITY 1353#if EV_MULTIPLICITY
… …
1130#else 1356#else
1131int 1357int
1132ev_default_loop (unsigned int flags) 1358ev_default_loop (unsigned int flags)
1133#endif 1359#endif
1134{ 1360{
1135 if (sigpipe [0] == sigpipe [1])
1136 if (pipe (sigpipe))
1137 return 0;
1138
1139 if (!ev_default_loop_ptr) 1361 if (!ev_default_loop_ptr)
1140 { 1362 {
1141#if EV_MULTIPLICITY 1363#if EV_MULTIPLICITY
1142 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1364 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1143#else 1365#else
… …
1146 1368
1147 loop_init (EV_A_ flags); 1369 loop_init (EV_A_ flags);
1148 1370
1149 if (ev_backend (EV_A)) 1371 if (ev_backend (EV_A))
1150 { 1372 {
1151 siginit (EV_A);
1152
1153#ifndef _WIN32 1373#ifndef _WIN32
1154 ev_signal_init (&childev, childcb, SIGCHLD); 1374 ev_signal_init (&childev, childcb, SIGCHLD);
1155 ev_set_priority (&childev, EV_MAXPRI); 1375 ev_set_priority (&childev, EV_MAXPRI);
1156 ev_signal_start (EV_A_ &childev); 1376 ev_signal_start (EV_A_ &childev);
1157 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1377 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1174#ifndef _WIN32 1394#ifndef _WIN32
1175 ev_ref (EV_A); /* child watcher */ 1395 ev_ref (EV_A); /* child watcher */
1176 ev_signal_stop (EV_A_ &childev); 1396 ev_signal_stop (EV_A_ &childev);
1177#endif 1397#endif
1178 1398
1179 ev_ref (EV_A); /* signal watcher */
1180 ev_io_stop (EV_A_ &sigev);
1181
1182 close (sigpipe [0]); sigpipe [0] = 0;
1183 close (sigpipe [1]); sigpipe [1] = 0;
1184
1185 loop_destroy (EV_A); 1399 loop_destroy (EV_A);
1186} 1400}
1187 1401
1188void 1402void
1189ev_default_fork (void) 1403ev_default_fork (void)
… …
1191#if EV_MULTIPLICITY 1405#if EV_MULTIPLICITY
1192 struct ev_loop *loop = ev_default_loop_ptr; 1406 struct ev_loop *loop = ev_default_loop_ptr;
1193#endif 1407#endif
1194 1408
1195 if (backend) 1409 if (backend)
1196 postfork = 1; 1410 postfork = 1; /* must be in line with ev_loop_fork */
1197} 1411}
1198 1412
1199/*****************************************************************************/ 1413/*****************************************************************************/
1200 1414
1201void 1415void
… …
1410static int loop_done; 1624static int loop_done;
1411 1625
1412void 1626void
1413ev_loop (EV_P_ int flags) 1627ev_loop (EV_P_ int flags)
1414{ 1628{
1415 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 1629 loop_done = EVUNLOOP_CANCEL;
1416 ? EVUNLOOP_ONE
1417 : EVUNLOOP_CANCEL;
1418 1630
1419 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 1631 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1420 1632
1421 do 1633 do
1422 { 1634 {
… …
1456 /* update fd-related kernel structures */ 1668 /* update fd-related kernel structures */
1457 fd_reify (EV_A); 1669 fd_reify (EV_A);
1458 1670
1459 /* calculate blocking time */ 1671 /* calculate blocking time */
1460 { 1672 {
1461 ev_tstamp block; 1673 ev_tstamp waittime = 0.;
1674 ev_tstamp sleeptime = 0.;
1462 1675
1463 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 1676 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1464 block = 0.; /* do not block at all */
1465 else
1466 { 1677 {
1467 /* update time to cancel out callback processing overhead */ 1678 /* update time to cancel out callback processing overhead */
1468 time_update (EV_A_ 1e100); 1679 time_update (EV_A_ 1e100);
1469 1680
1470 block = MAX_BLOCKTIME; 1681 waittime = MAX_BLOCKTIME;
1471 1682
1472 if (timercnt) 1683 if (timercnt)
1473 { 1684 {
1474 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 1685 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1475 if (block > to) block = to; 1686 if (waittime > to) waittime = to;
1476 } 1687 }
1477 1688
1478#if EV_PERIODIC_ENABLE 1689#if EV_PERIODIC_ENABLE
1479 if (periodiccnt) 1690 if (periodiccnt)
1480 { 1691 {
1481 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 1692 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1482 if (block > to) block = to; 1693 if (waittime > to) waittime = to;
1483 } 1694 }
1484#endif 1695#endif
1485 1696
1486 if (expect_false (block < 0.)) block = 0.; 1697 if (expect_false (waittime < timeout_blocktime))
1698 waittime = timeout_blocktime;
1699
1700 sleeptime = waittime - backend_fudge;
1701
1702 if (expect_true (sleeptime > io_blocktime))
1703 sleeptime = io_blocktime;
1704
1705 if (sleeptime)
1706 {
1707 ev_sleep (sleeptime);
1708 waittime -= sleeptime;
1709 }
1487 } 1710 }
1488 1711
1489 ++loop_count; 1712 ++loop_count;
1490 backend_poll (EV_A_ block); 1713 backend_poll (EV_A_ waittime);
1491 1714
1492 /* update ev_rt_now, do magic */ 1715 /* update ev_rt_now, do magic */
1493 time_update (EV_A_ block); 1716 time_update (EV_A_ waittime + sleeptime);
1494 } 1717 }
1495 1718
1496 /* queue pending timers and reschedule them */ 1719 /* queue pending timers and reschedule them */
1497 timers_reify (EV_A); /* relative timers called last */ 1720 timers_reify (EV_A); /* relative timers called last */
1498#if EV_PERIODIC_ENABLE 1721#if EV_PERIODIC_ENABLE
… …
1507 /* queue check watchers, to be executed first */ 1730 /* queue check watchers, to be executed first */
1508 if (expect_false (checkcnt)) 1731 if (expect_false (checkcnt))
1509 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1732 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1510 1733
1511 call_pending (EV_A); 1734 call_pending (EV_A);
1512
1513 } 1735 }
1514 while (expect_true (activecnt && !loop_done)); 1736 while (expect_true (
1737 activecnt
1738 && !loop_done
1739 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1740 ));
1515 1741
1516 if (loop_done == EVUNLOOP_ONE) 1742 if (loop_done == EVUNLOOP_ONE)
1517 loop_done = EVUNLOOP_CANCEL; 1743 loop_done = EVUNLOOP_CANCEL;
1518} 1744}
1519 1745
… …
1765 if (expect_false (ev_is_active (w))) 1991 if (expect_false (ev_is_active (w)))
1766 return; 1992 return;
1767 1993
1768 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 1994 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1769 1995
1996 evpipe_init (EV_A);
1997
1770 { 1998 {
1771#ifndef _WIN32 1999#ifndef _WIN32
1772 sigset_t full, prev; 2000 sigset_t full, prev;
1773 sigfillset (&full); 2001 sigfillset (&full);
1774 sigprocmask (SIG_SETMASK, &full, &prev); 2002 sigprocmask (SIG_SETMASK, &full, &prev);
… …
1785 wlist_add (&signals [w->signum - 1].head, (WL)w); 2013 wlist_add (&signals [w->signum - 1].head, (WL)w);
1786 2014
1787 if (!((WL)w)->next) 2015 if (!((WL)w)->next)
1788 { 2016 {
1789#if _WIN32 2017#if _WIN32
1790 signal (w->signum, sighandler); 2018 signal (w->signum, ev_sighandler);
1791#else 2019#else
1792 struct sigaction sa; 2020 struct sigaction sa;
1793 sa.sa_handler = sighandler; 2021 sa.sa_handler = ev_sighandler;
1794 sigfillset (&sa.sa_mask); 2022 sigfillset (&sa.sa_mask);
1795 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2023 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1796 sigaction (w->signum, &sa, 0); 2024 sigaction (w->signum, &sa, 0);
1797#endif 2025#endif
1798 } 2026 }
… …
2193 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 2421 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2194 2422
2195 if (ev_cb (w)) 2423 if (ev_cb (w))
2196 ev_feed_event (EV_A_ (W)w, EV_EMBED); 2424 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2197 else 2425 else
2198 ev_embed_sweep (loop, w); 2426 ev_loop (w->other, EVLOOP_NONBLOCK);
2199} 2427}
2200 2428
2201static void 2429static void
2202embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 2430embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2203{ 2431{
2204 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 2432 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2205 2433
2206 fd_reify (w->other); 2434 {
2435 struct ev_loop *loop = w->other;
2436
2437 while (fdchangecnt)
2438 {
2439 fd_reify (EV_A);
2440 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2441 }
2442 }
2207} 2443}
2444
2445#if 0
2446static void
2447embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2448{
2449 ev_idle_stop (EV_A_ idle);
2450}
2451#endif
2208 2452
2209void 2453void
2210ev_embed_start (EV_P_ ev_embed *w) 2454ev_embed_start (EV_P_ ev_embed *w)
2211{ 2455{
2212 if (expect_false (ev_is_active (w))) 2456 if (expect_false (ev_is_active (w)))
2213 return; 2457 return;
2214 2458
2215 { 2459 {
2216 struct ev_loop *loop = w->other; 2460 struct ev_loop *loop = w->other;
2217 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 2461 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2218 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_WRITE); 2462 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2219 } 2463 }
2220 2464
2221 ev_set_priority (&w->io, ev_priority (w)); 2465 ev_set_priority (&w->io, ev_priority (w));
2222 ev_io_start (EV_A_ &w->io); 2466 ev_io_start (EV_A_ &w->io);
2223 2467
2224 ev_prepare_init (&w->prepare, embed_prepare_cb); 2468 ev_prepare_init (&w->prepare, embed_prepare_cb);
2225 ev_set_priority (&w->prepare, EV_MINPRI); 2469 ev_set_priority (&w->prepare, EV_MINPRI);
2226 ev_prepare_start (EV_A_ &w->prepare); 2470 ev_prepare_start (EV_A_ &w->prepare);
2471
2472 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2227 2473
2228 ev_start (EV_A_ (W)w, 1); 2474 ev_start (EV_A_ (W)w, 1);
2229} 2475}
2230 2476
2231void 2477void
… …
2269 2515
2270 ev_stop (EV_A_ (W)w); 2516 ev_stop (EV_A_ (W)w);
2271} 2517}
2272#endif 2518#endif
2273 2519
2520#if EV_ASYNC_ENABLE
2521void
2522ev_async_start (EV_P_ ev_async *w)
2523{
2524 if (expect_false (ev_is_active (w)))
2525 return;
2526
2527 evpipe_init (EV_A);
2528
2529 ev_start (EV_A_ (W)w, ++asynccnt);
2530 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2531 asyncs [asynccnt - 1] = w;
2532}
2533
2534void
2535ev_async_stop (EV_P_ ev_async *w)
2536{
2537 clear_pending (EV_A_ (W)w);
2538 if (expect_false (!ev_is_active (w)))
2539 return;
2540
2541 {
2542 int active = ((W)w)->active;
2543 asyncs [active - 1] = asyncs [--asynccnt];
2544 ((W)asyncs [active - 1])->active = active;
2545 }
2546
2547 ev_stop (EV_A_ (W)w);
2548}
2549
2550void
2551ev_async_send (EV_P_ ev_async *w)
2552{
2553 w->sent = 1;
2554 evpipe_write (EV_A_ &gotasync);
2555}
2556#endif
2557
2274/*****************************************************************************/ 2558/*****************************************************************************/
2275 2559
2276struct ev_once 2560struct ev_once
2277{ 2561{
2278 ev_io io; 2562 ev_io io;

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