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Comparing libev/ev.c (file contents):
Revision 1.185 by root, Fri Dec 14 18:22:30 2007 UTC vs.
Revision 1.220 by root, Sun Apr 6 09:53:17 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 */
273int eventfd (unsigned int initval, int flags);
218#endif 274#endif
219 275
220/**/ 276/**/
221 277
222/* 278/*
… …
262 318
263typedef ev_watcher *W; 319typedef ev_watcher *W;
264typedef ev_watcher_list *WL; 320typedef ev_watcher_list *WL;
265typedef ev_watcher_time *WT; 321typedef ev_watcher_time *WT;
266 322
323#if EV_USE_MONOTONIC
324/* sig_atomic_t is used to avoid per-thread variables or locking but still */
325/* giving it a reasonably high chance of working on typical architetcures */
267static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 326static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
327#endif
268 328
269#ifdef _WIN32 329#ifdef _WIN32
270# include "ev_win32.c" 330# include "ev_win32.c"
271#endif 331#endif
272 332
… …
408{ 468{
409 return ev_rt_now; 469 return ev_rt_now;
410} 470}
411#endif 471#endif
412 472
473void
474ev_sleep (ev_tstamp delay)
475{
476 if (delay > 0.)
477 {
478#if EV_USE_NANOSLEEP
479 struct timespec ts;
480
481 ts.tv_sec = (time_t)delay;
482 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
483
484 nanosleep (&ts, 0);
485#elif defined(_WIN32)
486 Sleep ((unsigned long)(delay * 1e3));
487#else
488 struct timeval tv;
489
490 tv.tv_sec = (time_t)delay;
491 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
492
493 select (0, 0, 0, 0, &tv);
494#endif
495 }
496}
497
498/*****************************************************************************/
499
413int inline_size 500int inline_size
414array_nextsize (int elem, int cur, int cnt) 501array_nextsize (int elem, int cur, int cnt)
415{ 502{
416 int ncur = cur + 1; 503 int ncur = cur + 1;
417 504
… …
543 630
544#if EV_SELECT_IS_WINSOCKET 631#if EV_SELECT_IS_WINSOCKET
545 if (events) 632 if (events)
546 { 633 {
547 unsigned long argp; 634 unsigned long argp;
635 #ifdef EV_FD_TO_WIN32_HANDLE
636 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
637 #else
548 anfd->handle = _get_osfhandle (fd); 638 anfd->handle = _get_osfhandle (fd);
639 #endif
549 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 640 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
550 } 641 }
551#endif 642#endif
552 643
553 { 644 {
… …
702/*****************************************************************************/ 793/*****************************************************************************/
703 794
704typedef struct 795typedef struct
705{ 796{
706 WL head; 797 WL head;
707 sig_atomic_t volatile gotsig; 798 EV_ATOMIC_T gotsig;
708} ANSIG; 799} ANSIG;
709 800
710static ANSIG *signals; 801static ANSIG *signals;
711static int signalmax; 802static int signalmax;
712 803
713static int sigpipe [2]; 804static EV_ATOMIC_T gotsig;
714static sig_atomic_t volatile gotsig;
715static ev_io sigev;
716 805
717void inline_size 806void inline_size
718signals_init (ANSIG *base, int count) 807signals_init (ANSIG *base, int count)
719{ 808{
720 while (count--) 809 while (count--)
… …
724 813
725 ++base; 814 ++base;
726 } 815 }
727} 816}
728 817
729static void 818/*****************************************************************************/
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}
779 819
780void inline_speed 820void inline_speed
781fd_intern (int fd) 821fd_intern (int fd)
782{ 822{
783#ifdef _WIN32 823#ifdef _WIN32
… …
788 fcntl (fd, F_SETFL, O_NONBLOCK); 828 fcntl (fd, F_SETFL, O_NONBLOCK);
789#endif 829#endif
790} 830}
791 831
792static void noinline 832static void noinline
793siginit (EV_P) 833evpipe_init (EV_P)
794{ 834{
835 if (!ev_is_active (&pipeev))
836 {
837#if EV_USE_EVENTFD
838 if ((evfd = eventfd (0, 0)) >= 0)
839 {
840 evpipe [0] = -1;
841 fd_intern (evfd);
842 ev_io_set (&pipeev, evfd, EV_READ);
843 }
844 else
845#endif
846 {
847 while (pipe (evpipe))
848 syserr ("(libev) error creating signal/async pipe");
849
795 fd_intern (sigpipe [0]); 850 fd_intern (evpipe [0]);
796 fd_intern (sigpipe [1]); 851 fd_intern (evpipe [1]);
852 ev_io_set (&pipeev, evpipe [0], EV_READ);
853 }
797 854
798 ev_io_set (&sigev, sigpipe [0], EV_READ);
799 ev_io_start (EV_A_ &sigev); 855 ev_io_start (EV_A_ &pipeev);
800 ev_unref (EV_A); /* child watcher should not keep loop alive */ 856 ev_unref (EV_A); /* watcher should not keep loop alive */
857 }
858}
859
860void inline_size
861evpipe_write (EV_P_ EV_ATOMIC_T *flag)
862{
863 if (!*flag)
864 {
865 int old_errno = errno; /* save errno because write might clobber it */
866
867 *flag = 1;
868
869#if EV_USE_EVENTFD
870 if (evfd >= 0)
871 {
872 uint64_t counter = 1;
873 write (evfd, &counter, sizeof (uint64_t));
874 }
875 else
876#endif
877 write (evpipe [1], &old_errno, 1);
878
879 errno = old_errno;
880 }
881}
882
883static void
884pipecb (EV_P_ ev_io *iow, int revents)
885{
886#if EV_USE_EVENTFD
887 if (evfd >= 0)
888 {
889 uint64_t counter = 1;
890 read (evfd, &counter, sizeof (uint64_t));
891 }
892 else
893#endif
894 {
895 char dummy;
896 read (evpipe [0], &dummy, 1);
897 }
898
899 if (gotsig && ev_is_default_loop (EV_A))
900 {
901 int signum;
902 gotsig = 0;
903
904 for (signum = signalmax; signum--; )
905 if (signals [signum].gotsig)
906 ev_feed_signal_event (EV_A_ signum + 1);
907 }
908
909#if EV_ASYNC_ENABLE
910 if (gotasync)
911 {
912 int i;
913 gotasync = 0;
914
915 for (i = asynccnt; i--; )
916 if (asyncs [i]->sent)
917 {
918 asyncs [i]->sent = 0;
919 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
920 }
921 }
922#endif
801} 923}
802 924
803/*****************************************************************************/ 925/*****************************************************************************/
804 926
927static void
928ev_sighandler (int signum)
929{
930#if EV_MULTIPLICITY
931 struct ev_loop *loop = &default_loop_struct;
932#endif
933
934#if _WIN32
935 signal (signum, ev_sighandler);
936#endif
937
938 signals [signum - 1].gotsig = 1;
939 evpipe_write (EV_A_ &gotsig);
940}
941
942void noinline
943ev_feed_signal_event (EV_P_ int signum)
944{
945 WL w;
946
947#if EV_MULTIPLICITY
948 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
949#endif
950
951 --signum;
952
953 if (signum < 0 || signum >= signalmax)
954 return;
955
956 signals [signum].gotsig = 0;
957
958 for (w = signals [signum].head; w; w = w->next)
959 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
960}
961
962/*****************************************************************************/
963
805static WL childs [EV_PID_HASHSIZE]; 964static WL childs [EV_PID_HASHSIZE];
806 965
807#ifndef _WIN32 966#ifndef _WIN32
808 967
809static ev_signal childev; 968static ev_signal childev;
810 969
970#ifndef WIFCONTINUED
971# define WIFCONTINUED(status) 0
972#endif
973
811void inline_speed 974void inline_speed
812child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 975child_reap (EV_P_ int chain, int pid, int status)
813{ 976{
814 ev_child *w; 977 ev_child *w;
978 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
815 979
816 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 980 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
981 {
817 if (w->pid == pid || !w->pid) 982 if ((w->pid == pid || !w->pid)
983 && (!traced || (w->flags & 1)))
818 { 984 {
819 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 985 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; 986 w->rpid = pid;
821 w->rstatus = status; 987 w->rstatus = status;
822 ev_feed_event (EV_A_ (W)w, EV_CHILD); 988 ev_feed_event (EV_A_ (W)w, EV_CHILD);
823 } 989 }
990 }
824} 991}
825 992
826#ifndef WCONTINUED 993#ifndef WCONTINUED
827# define WCONTINUED 0 994# define WCONTINUED 0
828#endif 995#endif
… …
837 if (!WCONTINUED 1004 if (!WCONTINUED
838 || errno != EINVAL 1005 || errno != EINVAL
839 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1006 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
840 return; 1007 return;
841 1008
842 /* make sure we are called again until all childs have been reaped */ 1009 /* 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 */ 1010 /* 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); 1011 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
845 1012
846 child_reap (EV_A_ sw, pid, pid, status); 1013 child_reap (EV_A_ pid, pid, status);
847 if (EV_PID_HASHSIZE > 1) 1014 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 */ 1015 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
849} 1016}
850 1017
851#endif 1018#endif
852 1019
853/*****************************************************************************/ 1020/*****************************************************************************/
… …
925} 1092}
926 1093
927unsigned int 1094unsigned int
928ev_embeddable_backends (void) 1095ev_embeddable_backends (void)
929{ 1096{
930 return EVBACKEND_EPOLL 1097 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
931 | EVBACKEND_KQUEUE 1098
932 | EVBACKEND_PORT; 1099 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1100 /* please fix it and tell me how to detect the fix */
1101 flags &= ~EVBACKEND_EPOLL;
1102
1103 return flags;
933} 1104}
934 1105
935unsigned int 1106unsigned int
936ev_backend (EV_P) 1107ev_backend (EV_P)
937{ 1108{
… …
940 1111
941unsigned int 1112unsigned int
942ev_loop_count (EV_P) 1113ev_loop_count (EV_P)
943{ 1114{
944 return loop_count; 1115 return loop_count;
1116}
1117
1118void
1119ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1120{
1121 io_blocktime = interval;
1122}
1123
1124void
1125ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1126{
1127 timeout_blocktime = interval;
945} 1128}
946 1129
947static void noinline 1130static void noinline
948loop_init (EV_P_ unsigned int flags) 1131loop_init (EV_P_ unsigned int flags)
949{ 1132{
… …
955 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1138 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
956 have_monotonic = 1; 1139 have_monotonic = 1;
957 } 1140 }
958#endif 1141#endif
959 1142
960 ev_rt_now = ev_time (); 1143 ev_rt_now = ev_time ();
961 mn_now = get_clock (); 1144 mn_now = get_clock ();
962 now_floor = mn_now; 1145 now_floor = mn_now;
963 rtmn_diff = ev_rt_now - mn_now; 1146 rtmn_diff = ev_rt_now - mn_now;
1147
1148 io_blocktime = 0.;
1149 timeout_blocktime = 0.;
1150 backend = 0;
1151 backend_fd = -1;
1152 gotasync = 0;
1153#if EV_USE_INOTIFY
1154 fs_fd = -2;
1155#endif
964 1156
965 /* pid check not overridable via env */ 1157 /* pid check not overridable via env */
966#ifndef _WIN32 1158#ifndef _WIN32
967 if (flags & EVFLAG_FORKCHECK) 1159 if (flags & EVFLAG_FORKCHECK)
968 curpid = getpid (); 1160 curpid = getpid ();
… …
974 flags = atoi (getenv ("LIBEV_FLAGS")); 1166 flags = atoi (getenv ("LIBEV_FLAGS"));
975 1167
976 if (!(flags & 0x0000ffffUL)) 1168 if (!(flags & 0x0000ffffUL))
977 flags |= ev_recommended_backends (); 1169 flags |= ev_recommended_backends ();
978 1170
979 backend = 0;
980 backend_fd = -1;
981#if EV_USE_INOTIFY
982 fs_fd = -2;
983#endif
984
985#if EV_USE_PORT 1171#if EV_USE_PORT
986 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1172 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
987#endif 1173#endif
988#if EV_USE_KQUEUE 1174#if EV_USE_KQUEUE
989 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1175 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
996#endif 1182#endif
997#if EV_USE_SELECT 1183#if EV_USE_SELECT
998 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1184 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
999#endif 1185#endif
1000 1186
1001 ev_init (&sigev, sigcb); 1187 ev_init (&pipeev, pipecb);
1002 ev_set_priority (&sigev, EV_MAXPRI); 1188 ev_set_priority (&pipeev, EV_MAXPRI);
1003 } 1189 }
1004} 1190}
1005 1191
1006static void noinline 1192static void noinline
1007loop_destroy (EV_P) 1193loop_destroy (EV_P)
1008{ 1194{
1009 int i; 1195 int i;
1196
1197 if (ev_is_active (&pipeev))
1198 {
1199 ev_ref (EV_A); /* signal watcher */
1200 ev_io_stop (EV_A_ &pipeev);
1201
1202#if EV_USE_EVENTFD
1203 if (evfd >= 0)
1204 close (evfd);
1205#endif
1206
1207 if (evpipe [0] >= 0)
1208 {
1209 close (evpipe [0]);
1210 close (evpipe [1]);
1211 }
1212 }
1010 1213
1011#if EV_USE_INOTIFY 1214#if EV_USE_INOTIFY
1012 if (fs_fd >= 0) 1215 if (fs_fd >= 0)
1013 close (fs_fd); 1216 close (fs_fd);
1014#endif 1217#endif
… …
1037 array_free (pending, [i]); 1240 array_free (pending, [i]);
1038#if EV_IDLE_ENABLE 1241#if EV_IDLE_ENABLE
1039 array_free (idle, [i]); 1242 array_free (idle, [i]);
1040#endif 1243#endif
1041 } 1244 }
1245
1246 ev_free (anfds); anfdmax = 0;
1042 1247
1043 /* have to use the microsoft-never-gets-it-right macro */ 1248 /* have to use the microsoft-never-gets-it-right macro */
1044 array_free (fdchange, EMPTY); 1249 array_free (fdchange, EMPTY);
1045 array_free (timer, EMPTY); 1250 array_free (timer, EMPTY);
1046#if EV_PERIODIC_ENABLE 1251#if EV_PERIODIC_ENABLE
1047 array_free (periodic, EMPTY); 1252 array_free (periodic, EMPTY);
1048#endif 1253#endif
1254#if EV_FORK_ENABLE
1255 array_free (fork, EMPTY);
1256#endif
1049 array_free (prepare, EMPTY); 1257 array_free (prepare, EMPTY);
1050 array_free (check, EMPTY); 1258 array_free (check, EMPTY);
1259#if EV_ASYNC_ENABLE
1260 array_free (async, EMPTY);
1261#endif
1051 1262
1052 backend = 0; 1263 backend = 0;
1053} 1264}
1054 1265
1055void inline_size infy_fork (EV_P); 1266void inline_size infy_fork (EV_P);
… …
1068#endif 1279#endif
1069#if EV_USE_INOTIFY 1280#if EV_USE_INOTIFY
1070 infy_fork (EV_A); 1281 infy_fork (EV_A);
1071#endif 1282#endif
1072 1283
1073 if (ev_is_active (&sigev)) 1284 if (ev_is_active (&pipeev))
1074 { 1285 {
1075 /* default loop */ 1286 /* this "locks" the handlers against writing to the pipe */
1287 /* while we modify the fd vars */
1288 gotsig = 1;
1289#if EV_ASYNC_ENABLE
1290 gotasync = 1;
1291#endif
1076 1292
1077 ev_ref (EV_A); 1293 ev_ref (EV_A);
1078 ev_io_stop (EV_A_ &sigev); 1294 ev_io_stop (EV_A_ &pipeev);
1295
1296#if EV_USE_EVENTFD
1297 if (evfd >= 0)
1298 close (evfd);
1299#endif
1300
1301 if (evpipe [0] >= 0)
1302 {
1079 close (sigpipe [0]); 1303 close (evpipe [0]);
1080 close (sigpipe [1]); 1304 close (evpipe [1]);
1305 }
1081 1306
1082 while (pipe (sigpipe))
1083 syserr ("(libev) error creating pipe");
1084
1085 siginit (EV_A); 1307 evpipe_init (EV_A);
1308 /* now iterate over everything, in case we missed something */
1309 pipecb (EV_A_ &pipeev, EV_READ);
1086 } 1310 }
1087 1311
1088 postfork = 0; 1312 postfork = 0;
1089} 1313}
1090 1314
… …
1112} 1336}
1113 1337
1114void 1338void
1115ev_loop_fork (EV_P) 1339ev_loop_fork (EV_P)
1116{ 1340{
1117 postfork = 1; 1341 postfork = 1; /* must be in line with ev_default_fork */
1118} 1342}
1119 1343
1120#endif 1344#endif
1121 1345
1122#if EV_MULTIPLICITY 1346#if EV_MULTIPLICITY
… …
1125#else 1349#else
1126int 1350int
1127ev_default_loop (unsigned int flags) 1351ev_default_loop (unsigned int flags)
1128#endif 1352#endif
1129{ 1353{
1130 if (sigpipe [0] == sigpipe [1])
1131 if (pipe (sigpipe))
1132 return 0;
1133
1134 if (!ev_default_loop_ptr) 1354 if (!ev_default_loop_ptr)
1135 { 1355 {
1136#if EV_MULTIPLICITY 1356#if EV_MULTIPLICITY
1137 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1357 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1138#else 1358#else
… …
1141 1361
1142 loop_init (EV_A_ flags); 1362 loop_init (EV_A_ flags);
1143 1363
1144 if (ev_backend (EV_A)) 1364 if (ev_backend (EV_A))
1145 { 1365 {
1146 siginit (EV_A);
1147
1148#ifndef _WIN32 1366#ifndef _WIN32
1149 ev_signal_init (&childev, childcb, SIGCHLD); 1367 ev_signal_init (&childev, childcb, SIGCHLD);
1150 ev_set_priority (&childev, EV_MAXPRI); 1368 ev_set_priority (&childev, EV_MAXPRI);
1151 ev_signal_start (EV_A_ &childev); 1369 ev_signal_start (EV_A_ &childev);
1152 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1370 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1169#ifndef _WIN32 1387#ifndef _WIN32
1170 ev_ref (EV_A); /* child watcher */ 1388 ev_ref (EV_A); /* child watcher */
1171 ev_signal_stop (EV_A_ &childev); 1389 ev_signal_stop (EV_A_ &childev);
1172#endif 1390#endif
1173 1391
1174 ev_ref (EV_A); /* signal watcher */
1175 ev_io_stop (EV_A_ &sigev);
1176
1177 close (sigpipe [0]); sigpipe [0] = 0;
1178 close (sigpipe [1]); sigpipe [1] = 0;
1179
1180 loop_destroy (EV_A); 1392 loop_destroy (EV_A);
1181} 1393}
1182 1394
1183void 1395void
1184ev_default_fork (void) 1396ev_default_fork (void)
… …
1186#if EV_MULTIPLICITY 1398#if EV_MULTIPLICITY
1187 struct ev_loop *loop = ev_default_loop_ptr; 1399 struct ev_loop *loop = ev_default_loop_ptr;
1188#endif 1400#endif
1189 1401
1190 if (backend) 1402 if (backend)
1191 postfork = 1; 1403 postfork = 1; /* must be in line with ev_loop_fork */
1192} 1404}
1193 1405
1194/*****************************************************************************/ 1406/*****************************************************************************/
1195 1407
1196void 1408void
… …
1405static int loop_done; 1617static int loop_done;
1406 1618
1407void 1619void
1408ev_loop (EV_P_ int flags) 1620ev_loop (EV_P_ int flags)
1409{ 1621{
1410 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 1622 loop_done = EVUNLOOP_CANCEL;
1411 ? EVUNLOOP_ONE
1412 : EVUNLOOP_CANCEL;
1413 1623
1414 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 1624 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1415 1625
1416 do 1626 do
1417 { 1627 {
… …
1451 /* update fd-related kernel structures */ 1661 /* update fd-related kernel structures */
1452 fd_reify (EV_A); 1662 fd_reify (EV_A);
1453 1663
1454 /* calculate blocking time */ 1664 /* calculate blocking time */
1455 { 1665 {
1456 ev_tstamp block; 1666 ev_tstamp waittime = 0.;
1667 ev_tstamp sleeptime = 0.;
1457 1668
1458 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 1669 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1459 block = 0.; /* do not block at all */
1460 else
1461 { 1670 {
1462 /* update time to cancel out callback processing overhead */ 1671 /* update time to cancel out callback processing overhead */
1463 time_update (EV_A_ 1e100); 1672 time_update (EV_A_ 1e100);
1464 1673
1465 block = MAX_BLOCKTIME; 1674 waittime = MAX_BLOCKTIME;
1466 1675
1467 if (timercnt) 1676 if (timercnt)
1468 { 1677 {
1469 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 1678 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1470 if (block > to) block = to; 1679 if (waittime > to) waittime = to;
1471 } 1680 }
1472 1681
1473#if EV_PERIODIC_ENABLE 1682#if EV_PERIODIC_ENABLE
1474 if (periodiccnt) 1683 if (periodiccnt)
1475 { 1684 {
1476 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 1685 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1477 if (block > to) block = to; 1686 if (waittime > to) waittime = to;
1478 } 1687 }
1479#endif 1688#endif
1480 1689
1481 if (expect_false (block < 0.)) block = 0.; 1690 if (expect_false (waittime < timeout_blocktime))
1691 waittime = timeout_blocktime;
1692
1693 sleeptime = waittime - backend_fudge;
1694
1695 if (expect_true (sleeptime > io_blocktime))
1696 sleeptime = io_blocktime;
1697
1698 if (sleeptime)
1699 {
1700 ev_sleep (sleeptime);
1701 waittime -= sleeptime;
1702 }
1482 } 1703 }
1483 1704
1484 ++loop_count; 1705 ++loop_count;
1485 backend_poll (EV_A_ block); 1706 backend_poll (EV_A_ waittime);
1486 1707
1487 /* update ev_rt_now, do magic */ 1708 /* update ev_rt_now, do magic */
1488 time_update (EV_A_ block); 1709 time_update (EV_A_ waittime + sleeptime);
1489 } 1710 }
1490 1711
1491 /* queue pending timers and reschedule them */ 1712 /* queue pending timers and reschedule them */
1492 timers_reify (EV_A); /* relative timers called last */ 1713 timers_reify (EV_A); /* relative timers called last */
1493#if EV_PERIODIC_ENABLE 1714#if EV_PERIODIC_ENABLE
… …
1502 /* queue check watchers, to be executed first */ 1723 /* queue check watchers, to be executed first */
1503 if (expect_false (checkcnt)) 1724 if (expect_false (checkcnt))
1504 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1725 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1505 1726
1506 call_pending (EV_A); 1727 call_pending (EV_A);
1507
1508 } 1728 }
1509 while (expect_true (activecnt && !loop_done)); 1729 while (expect_true (
1730 activecnt
1731 && !loop_done
1732 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1733 ));
1510 1734
1511 if (loop_done == EVUNLOOP_ONE) 1735 if (loop_done == EVUNLOOP_ONE)
1512 loop_done = EVUNLOOP_CANCEL; 1736 loop_done = EVUNLOOP_CANCEL;
1513} 1737}
1514 1738
… …
1760 if (expect_false (ev_is_active (w))) 1984 if (expect_false (ev_is_active (w)))
1761 return; 1985 return;
1762 1986
1763 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 1987 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1764 1988
1989 evpipe_init (EV_A);
1990
1765 { 1991 {
1766#ifndef _WIN32 1992#ifndef _WIN32
1767 sigset_t full, prev; 1993 sigset_t full, prev;
1768 sigfillset (&full); 1994 sigfillset (&full);
1769 sigprocmask (SIG_SETMASK, &full, &prev); 1995 sigprocmask (SIG_SETMASK, &full, &prev);
… …
1780 wlist_add (&signals [w->signum - 1].head, (WL)w); 2006 wlist_add (&signals [w->signum - 1].head, (WL)w);
1781 2007
1782 if (!((WL)w)->next) 2008 if (!((WL)w)->next)
1783 { 2009 {
1784#if _WIN32 2010#if _WIN32
1785 signal (w->signum, sighandler); 2011 signal (w->signum, ev_sighandler);
1786#else 2012#else
1787 struct sigaction sa; 2013 struct sigaction sa;
1788 sa.sa_handler = sighandler; 2014 sa.sa_handler = ev_sighandler;
1789 sigfillset (&sa.sa_mask); 2015 sigfillset (&sa.sa_mask);
1790 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2016 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1791 sigaction (w->signum, &sa, 0); 2017 sigaction (w->signum, &sa, 0);
1792#endif 2018#endif
1793 } 2019 }
… …
2177 2403
2178#if EV_EMBED_ENABLE 2404#if EV_EMBED_ENABLE
2179void noinline 2405void noinline
2180ev_embed_sweep (EV_P_ ev_embed *w) 2406ev_embed_sweep (EV_P_ ev_embed *w)
2181{ 2407{
2182 ev_loop (w->loop, EVLOOP_NONBLOCK); 2408 ev_loop (w->other, EVLOOP_NONBLOCK);
2183} 2409}
2184 2410
2185static void 2411static void
2186embed_cb (EV_P_ ev_io *io, int revents) 2412embed_io_cb (EV_P_ ev_io *io, int revents)
2187{ 2413{
2188 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 2414 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2189 2415
2190 if (ev_cb (w)) 2416 if (ev_cb (w))
2191 ev_feed_event (EV_A_ (W)w, EV_EMBED); 2417 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2192 else 2418 else
2193 ev_embed_sweep (loop, w); 2419 ev_loop (w->other, EVLOOP_NONBLOCK);
2194} 2420}
2421
2422static void
2423embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2424{
2425 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2426
2427 {
2428 struct ev_loop *loop = w->other;
2429
2430 while (fdchangecnt)
2431 {
2432 fd_reify (EV_A);
2433 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2434 }
2435 }
2436}
2437
2438#if 0
2439static void
2440embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2441{
2442 ev_idle_stop (EV_A_ idle);
2443}
2444#endif
2195 2445
2196void 2446void
2197ev_embed_start (EV_P_ ev_embed *w) 2447ev_embed_start (EV_P_ ev_embed *w)
2198{ 2448{
2199 if (expect_false (ev_is_active (w))) 2449 if (expect_false (ev_is_active (w)))
2200 return; 2450 return;
2201 2451
2202 { 2452 {
2203 struct ev_loop *loop = w->loop; 2453 struct ev_loop *loop = w->other;
2204 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 2454 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2205 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 2455 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2206 } 2456 }
2207 2457
2208 ev_set_priority (&w->io, ev_priority (w)); 2458 ev_set_priority (&w->io, ev_priority (w));
2209 ev_io_start (EV_A_ &w->io); 2459 ev_io_start (EV_A_ &w->io);
2210 2460
2461 ev_prepare_init (&w->prepare, embed_prepare_cb);
2462 ev_set_priority (&w->prepare, EV_MINPRI);
2463 ev_prepare_start (EV_A_ &w->prepare);
2464
2465 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2466
2211 ev_start (EV_A_ (W)w, 1); 2467 ev_start (EV_A_ (W)w, 1);
2212} 2468}
2213 2469
2214void 2470void
2215ev_embed_stop (EV_P_ ev_embed *w) 2471ev_embed_stop (EV_P_ ev_embed *w)
… …
2217 clear_pending (EV_A_ (W)w); 2473 clear_pending (EV_A_ (W)w);
2218 if (expect_false (!ev_is_active (w))) 2474 if (expect_false (!ev_is_active (w)))
2219 return; 2475 return;
2220 2476
2221 ev_io_stop (EV_A_ &w->io); 2477 ev_io_stop (EV_A_ &w->io);
2478 ev_prepare_stop (EV_A_ &w->prepare);
2222 2479
2223 ev_stop (EV_A_ (W)w); 2480 ev_stop (EV_A_ (W)w);
2224} 2481}
2225#endif 2482#endif
2226 2483
… …
2251 2508
2252 ev_stop (EV_A_ (W)w); 2509 ev_stop (EV_A_ (W)w);
2253} 2510}
2254#endif 2511#endif
2255 2512
2513#if EV_ASYNC_ENABLE
2514void
2515ev_async_start (EV_P_ ev_async *w)
2516{
2517 if (expect_false (ev_is_active (w)))
2518 return;
2519
2520 evpipe_init (EV_A);
2521
2522 ev_start (EV_A_ (W)w, ++asynccnt);
2523 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2524 asyncs [asynccnt - 1] = w;
2525}
2526
2527void
2528ev_async_stop (EV_P_ ev_async *w)
2529{
2530 clear_pending (EV_A_ (W)w);
2531 if (expect_false (!ev_is_active (w)))
2532 return;
2533
2534 {
2535 int active = ((W)w)->active;
2536 asyncs [active - 1] = asyncs [--asynccnt];
2537 ((W)asyncs [active - 1])->active = active;
2538 }
2539
2540 ev_stop (EV_A_ (W)w);
2541}
2542
2543void
2544ev_async_send (EV_P_ ev_async *w)
2545{
2546 w->sent = 1;
2547 evpipe_write (EV_A_ &gotasync);
2548}
2549#endif
2550
2256/*****************************************************************************/ 2551/*****************************************************************************/
2257 2552
2258struct ev_once 2553struct ev_once
2259{ 2554{
2260 ev_io io; 2555 ev_io io;
… …
2315 ev_timer_set (&once->to, timeout, 0.); 2610 ev_timer_set (&once->to, timeout, 0.);
2316 ev_timer_start (EV_A_ &once->to); 2611 ev_timer_start (EV_A_ &once->to);
2317 } 2612 }
2318} 2613}
2319 2614
2615#if EV_MULTIPLICITY
2616 #include "ev_wrap.h"
2617#endif
2618
2320#ifdef __cplusplus 2619#ifdef __cplusplus
2321} 2620}
2322#endif 2621#endif
2323 2622

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