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Comparing libev/ev.c (file contents):
Revision 1.193 by root, Sat Dec 22 05:47:58 2007 UTC vs.
Revision 1.227 by root, Fri May 2 07:20:01 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"
… …
110# else 119# else
111# define EV_USE_INOTIFY 0 120# define EV_USE_INOTIFY 0
112# endif 121# endif
113# endif 122# endif
114 123
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
115#endif 132#endif
116 133
117#include <math.h> 134#include <math.h>
118#include <stdlib.h> 135#include <stdlib.h>
119#include <fcntl.h> 136#include <fcntl.h>
… …
144# ifndef EV_SELECT_IS_WINSOCKET 161# ifndef EV_SELECT_IS_WINSOCKET
145# define EV_SELECT_IS_WINSOCKET 1 162# define EV_SELECT_IS_WINSOCKET 1
146# endif 163# endif
147#endif 164#endif
148 165
149/**/ 166/* this block tries to deduce configuration from header-defined symbols and defaults */
150 167
151#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
152# define EV_USE_MONOTONIC 0 169# define EV_USE_MONOTONIC 0
153#endif 170#endif
154 171
… …
171# define EV_USE_POLL 1 188# define EV_USE_POLL 1
172# endif 189# endif
173#endif 190#endif
174 191
175#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
176# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
177#endif 198#endif
178 199
179#ifndef EV_USE_KQUEUE 200#ifndef EV_USE_KQUEUE
180# define EV_USE_KQUEUE 0 201# define EV_USE_KQUEUE 0
181#endif 202#endif
… …
183#ifndef EV_USE_PORT 204#ifndef EV_USE_PORT
184# define EV_USE_PORT 0 205# define EV_USE_PORT 0
185#endif 206#endif
186 207
187#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
188# define EV_USE_INOTIFY 0 212# define EV_USE_INOTIFY 0
213# endif
189#endif 214#endif
190 215
191#ifndef EV_PID_HASHSIZE 216#ifndef EV_PID_HASHSIZE
192# if EV_MINIMAL 217# if EV_MINIMAL
193# define EV_PID_HASHSIZE 1 218# define EV_PID_HASHSIZE 1
… …
202# else 227# else
203# define EV_INOTIFY_HASHSIZE 16 228# define EV_INOTIFY_HASHSIZE 16
204# endif 229# endif
205#endif 230#endif
206 231
207/**/ 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 */
208 241
209#ifndef CLOCK_MONOTONIC 242#ifndef CLOCK_MONOTONIC
210# undef EV_USE_MONOTONIC 243# undef EV_USE_MONOTONIC
211# define EV_USE_MONOTONIC 0 244# define EV_USE_MONOTONIC 0
212#endif 245#endif
… …
231# include <sys/inotify.h> 264# include <sys/inotify.h>
232#endif 265#endif
233 266
234#if EV_SELECT_IS_WINSOCKET 267#if EV_SELECT_IS_WINSOCKET
235# 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
236#endif 281#endif
237 282
238/**/ 283/**/
239 284
240/* 285/*
… …
255# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
256# define noinline __attribute__ ((noinline)) 301# define noinline __attribute__ ((noinline))
257#else 302#else
258# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
259# define noinline 304# define noinline
260# if __STDC_VERSION__ < 199901L 305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
261# define inline 306# define inline
262# endif 307# endif
263#endif 308#endif
264 309
265#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
… …
280 325
281typedef ev_watcher *W; 326typedef ev_watcher *W;
282typedef ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
283typedef ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
284 329
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 */
285static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 333static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
334#endif
286 335
287#ifdef _WIN32 336#ifdef _WIN32
288# include "ev_win32.c" 337# include "ev_win32.c"
289#endif 338#endif
290 339
… …
311 perror (msg); 360 perror (msg);
312 abort (); 361 abort ();
313 } 362 }
314} 363}
315 364
365static void *
366ev_realloc_emul (void *ptr, long size)
367{
368 /* some systems, notably openbsd and darwin, fail to properly
369 * implement realloc (x, 0) (as required by both ansi c-98 and
370 * the single unix specification, so work around them here.
371 */
372
373 if (size)
374 return realloc (ptr, size);
375
376 free (ptr);
377 return 0;
378}
379
316static void *(*alloc)(void *ptr, long size); 380static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
317 381
318void 382void
319ev_set_allocator (void *(*cb)(void *ptr, long size)) 383ev_set_allocator (void *(*cb)(void *ptr, long size))
320{ 384{
321 alloc = cb; 385 alloc = cb;
322} 386}
323 387
324inline_speed void * 388inline_speed void *
325ev_realloc (void *ptr, long size) 389ev_realloc (void *ptr, long size)
326{ 390{
327 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 391 ptr = alloc (ptr, size);
328 392
329 if (!ptr && size) 393 if (!ptr && size)
330 { 394 {
331 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 395 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
332 abort (); 396 abort ();
… …
439 ts.tv_sec = (time_t)delay; 503 ts.tv_sec = (time_t)delay;
440 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9); 504 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
441 505
442 nanosleep (&ts, 0); 506 nanosleep (&ts, 0);
443#elif defined(_WIN32) 507#elif defined(_WIN32)
444 Sleep (delay * 1e3); 508 Sleep ((unsigned long)(delay * 1e3));
445#else 509#else
446 struct timeval tv; 510 struct timeval tv;
447 511
448 tv.tv_sec = (time_t)delay; 512 tv.tv_sec = (time_t)delay;
449 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 513 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
… …
588 652
589#if EV_SELECT_IS_WINSOCKET 653#if EV_SELECT_IS_WINSOCKET
590 if (events) 654 if (events)
591 { 655 {
592 unsigned long argp; 656 unsigned long argp;
657 #ifdef EV_FD_TO_WIN32_HANDLE
658 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
659 #else
593 anfd->handle = _get_osfhandle (fd); 660 anfd->handle = _get_osfhandle (fd);
661 #endif
594 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 662 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
595 } 663 }
596#endif 664#endif
597 665
598 { 666 {
… …
686 } 754 }
687} 755}
688 756
689/*****************************************************************************/ 757/*****************************************************************************/
690 758
759/* towards the root */
691void inline_speed 760void inline_speed
692upheap (WT *heap, int k) 761upheap (WT *heap, int k)
693{ 762{
694 WT w = heap [k]; 763 WT w = heap [k];
695 764
… …
707 776
708 heap [k] = w; 777 heap [k] = w;
709 ((W)heap [k])->active = k + 1; 778 ((W)heap [k])->active = k + 1;
710} 779}
711 780
781/* away from the root */
712void inline_speed 782void inline_speed
713downheap (WT *heap, int N, int k) 783downheap (WT *heap, int N, int k)
714{ 784{
715 WT w = heap [k]; 785 WT w = heap [k];
716 786
… …
747/*****************************************************************************/ 817/*****************************************************************************/
748 818
749typedef struct 819typedef struct
750{ 820{
751 WL head; 821 WL head;
752 sig_atomic_t volatile gotsig; 822 EV_ATOMIC_T gotsig;
753} ANSIG; 823} ANSIG;
754 824
755static ANSIG *signals; 825static ANSIG *signals;
756static int signalmax; 826static int signalmax;
757 827
758static int sigpipe [2]; 828static EV_ATOMIC_T gotsig;
759static sig_atomic_t volatile gotsig;
760static ev_io sigev;
761 829
762void inline_size 830void inline_size
763signals_init (ANSIG *base, int count) 831signals_init (ANSIG *base, int count)
764{ 832{
765 while (count--) 833 while (count--)
… …
769 837
770 ++base; 838 ++base;
771 } 839 }
772} 840}
773 841
774static void 842/*****************************************************************************/
775sighandler (int signum)
776{
777#if _WIN32
778 signal (signum, sighandler);
779#endif
780
781 signals [signum - 1].gotsig = 1;
782
783 if (!gotsig)
784 {
785 int old_errno = errno;
786 gotsig = 1;
787 write (sigpipe [1], &signum, 1);
788 errno = old_errno;
789 }
790}
791
792void noinline
793ev_feed_signal_event (EV_P_ int signum)
794{
795 WL w;
796
797#if EV_MULTIPLICITY
798 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
799#endif
800
801 --signum;
802
803 if (signum < 0 || signum >= signalmax)
804 return;
805
806 signals [signum].gotsig = 0;
807
808 for (w = signals [signum].head; w; w = w->next)
809 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
810}
811
812static void
813sigcb (EV_P_ ev_io *iow, int revents)
814{
815 int signum;
816
817 read (sigpipe [0], &revents, 1);
818 gotsig = 0;
819
820 for (signum = signalmax; signum--; )
821 if (signals [signum].gotsig)
822 ev_feed_signal_event (EV_A_ signum + 1);
823}
824 843
825void inline_speed 844void inline_speed
826fd_intern (int fd) 845fd_intern (int fd)
827{ 846{
828#ifdef _WIN32 847#ifdef _WIN32
… …
833 fcntl (fd, F_SETFL, O_NONBLOCK); 852 fcntl (fd, F_SETFL, O_NONBLOCK);
834#endif 853#endif
835} 854}
836 855
837static void noinline 856static void noinline
838siginit (EV_P) 857evpipe_init (EV_P)
839{ 858{
859 if (!ev_is_active (&pipeev))
860 {
861#if EV_USE_EVENTFD
862 if ((evfd = eventfd (0, 0)) >= 0)
863 {
864 evpipe [0] = -1;
865 fd_intern (evfd);
866 ev_io_set (&pipeev, evfd, EV_READ);
867 }
868 else
869#endif
870 {
871 while (pipe (evpipe))
872 syserr ("(libev) error creating signal/async pipe");
873
840 fd_intern (sigpipe [0]); 874 fd_intern (evpipe [0]);
841 fd_intern (sigpipe [1]); 875 fd_intern (evpipe [1]);
876 ev_io_set (&pipeev, evpipe [0], EV_READ);
877 }
842 878
843 ev_io_set (&sigev, sigpipe [0], EV_READ);
844 ev_io_start (EV_A_ &sigev); 879 ev_io_start (EV_A_ &pipeev);
845 ev_unref (EV_A); /* child watcher should not keep loop alive */ 880 ev_unref (EV_A); /* watcher should not keep loop alive */
881 }
882}
883
884void inline_size
885evpipe_write (EV_P_ EV_ATOMIC_T *flag)
886{
887 if (!*flag)
888 {
889 int old_errno = errno; /* save errno because write might clobber it */
890
891 *flag = 1;
892
893#if EV_USE_EVENTFD
894 if (evfd >= 0)
895 {
896 uint64_t counter = 1;
897 write (evfd, &counter, sizeof (uint64_t));
898 }
899 else
900#endif
901 write (evpipe [1], &old_errno, 1);
902
903 errno = old_errno;
904 }
905}
906
907static void
908pipecb (EV_P_ ev_io *iow, int revents)
909{
910#if EV_USE_EVENTFD
911 if (evfd >= 0)
912 {
913 uint64_t counter = 1;
914 read (evfd, &counter, sizeof (uint64_t));
915 }
916 else
917#endif
918 {
919 char dummy;
920 read (evpipe [0], &dummy, 1);
921 }
922
923 if (gotsig && ev_is_default_loop (EV_A))
924 {
925 int signum;
926 gotsig = 0;
927
928 for (signum = signalmax; signum--; )
929 if (signals [signum].gotsig)
930 ev_feed_signal_event (EV_A_ signum + 1);
931 }
932
933#if EV_ASYNC_ENABLE
934 if (gotasync)
935 {
936 int i;
937 gotasync = 0;
938
939 for (i = asynccnt; i--; )
940 if (asyncs [i]->sent)
941 {
942 asyncs [i]->sent = 0;
943 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
944 }
945 }
946#endif
846} 947}
847 948
848/*****************************************************************************/ 949/*****************************************************************************/
849 950
951static void
952ev_sighandler (int signum)
953{
954#if EV_MULTIPLICITY
955 struct ev_loop *loop = &default_loop_struct;
956#endif
957
958#if _WIN32
959 signal (signum, ev_sighandler);
960#endif
961
962 signals [signum - 1].gotsig = 1;
963 evpipe_write (EV_A_ &gotsig);
964}
965
966void noinline
967ev_feed_signal_event (EV_P_ int signum)
968{
969 WL w;
970
971#if EV_MULTIPLICITY
972 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
973#endif
974
975 --signum;
976
977 if (signum < 0 || signum >= signalmax)
978 return;
979
980 signals [signum].gotsig = 0;
981
982 for (w = signals [signum].head; w; w = w->next)
983 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
984}
985
986/*****************************************************************************/
987
850static WL childs [EV_PID_HASHSIZE]; 988static WL childs [EV_PID_HASHSIZE];
851 989
852#ifndef _WIN32 990#ifndef _WIN32
853 991
854static ev_signal childev; 992static ev_signal childev;
855 993
994#ifndef WIFCONTINUED
995# define WIFCONTINUED(status) 0
996#endif
997
856void inline_speed 998void inline_speed
857child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 999child_reap (EV_P_ int chain, int pid, int status)
858{ 1000{
859 ev_child *w; 1001 ev_child *w;
1002 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
860 1003
861 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1004 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1005 {
862 if (w->pid == pid || !w->pid) 1006 if ((w->pid == pid || !w->pid)
1007 && (!traced || (w->flags & 1)))
863 { 1008 {
864 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1009 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
865 w->rpid = pid; 1010 w->rpid = pid;
866 w->rstatus = status; 1011 w->rstatus = status;
867 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1012 ev_feed_event (EV_A_ (W)w, EV_CHILD);
868 } 1013 }
1014 }
869} 1015}
870 1016
871#ifndef WCONTINUED 1017#ifndef WCONTINUED
872# define WCONTINUED 0 1018# define WCONTINUED 0
873#endif 1019#endif
… …
882 if (!WCONTINUED 1028 if (!WCONTINUED
883 || errno != EINVAL 1029 || errno != EINVAL
884 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1030 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
885 return; 1031 return;
886 1032
887 /* make sure we are called again until all childs have been reaped */ 1033 /* make sure we are called again until all children have been reaped */
888 /* we need to do it this way so that the callback gets called before we continue */ 1034 /* we need to do it this way so that the callback gets called before we continue */
889 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1035 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
890 1036
891 child_reap (EV_A_ sw, pid, pid, status); 1037 child_reap (EV_A_ pid, pid, status);
892 if (EV_PID_HASHSIZE > 1) 1038 if (EV_PID_HASHSIZE > 1)
893 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1039 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
894} 1040}
895 1041
896#endif 1042#endif
897 1043
898/*****************************************************************************/ 1044/*****************************************************************************/
… …
970} 1116}
971 1117
972unsigned int 1118unsigned int
973ev_embeddable_backends (void) 1119ev_embeddable_backends (void)
974{ 1120{
1121 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1122
975 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1123 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
976 return EVBACKEND_KQUEUE 1124 /* please fix it and tell me how to detect the fix */
977 | EVBACKEND_PORT; 1125 flags &= ~EVBACKEND_EPOLL;
1126
1127 return flags;
978} 1128}
979 1129
980unsigned int 1130unsigned int
981ev_backend (EV_P) 1131ev_backend (EV_P)
982{ 1132{
… …
1012 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1162 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1013 have_monotonic = 1; 1163 have_monotonic = 1;
1014 } 1164 }
1015#endif 1165#endif
1016 1166
1017 ev_rt_now = ev_time (); 1167 ev_rt_now = ev_time ();
1018 mn_now = get_clock (); 1168 mn_now = get_clock ();
1019 now_floor = mn_now; 1169 now_floor = mn_now;
1020 rtmn_diff = ev_rt_now - mn_now; 1170 rtmn_diff = ev_rt_now - mn_now;
1021 1171
1022 io_blocktime = 0.; 1172 io_blocktime = 0.;
1023 timeout_blocktime = 0.; 1173 timeout_blocktime = 0.;
1174 backend = 0;
1175 backend_fd = -1;
1176 gotasync = 0;
1177#if EV_USE_INOTIFY
1178 fs_fd = -2;
1179#endif
1024 1180
1025 /* pid check not overridable via env */ 1181 /* pid check not overridable via env */
1026#ifndef _WIN32 1182#ifndef _WIN32
1027 if (flags & EVFLAG_FORKCHECK) 1183 if (flags & EVFLAG_FORKCHECK)
1028 curpid = getpid (); 1184 curpid = getpid ();
… …
1031 if (!(flags & EVFLAG_NOENV) 1187 if (!(flags & EVFLAG_NOENV)
1032 && !enable_secure () 1188 && !enable_secure ()
1033 && getenv ("LIBEV_FLAGS")) 1189 && getenv ("LIBEV_FLAGS"))
1034 flags = atoi (getenv ("LIBEV_FLAGS")); 1190 flags = atoi (getenv ("LIBEV_FLAGS"));
1035 1191
1036 if (!(flags & 0x0000ffffUL)) 1192 if (!(flags & 0x0000ffffU))
1037 flags |= ev_recommended_backends (); 1193 flags |= ev_recommended_backends ();
1038
1039 backend = 0;
1040 backend_fd = -1;
1041#if EV_USE_INOTIFY
1042 fs_fd = -2;
1043#endif
1044 1194
1045#if EV_USE_PORT 1195#if EV_USE_PORT
1046 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1196 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1047#endif 1197#endif
1048#if EV_USE_KQUEUE 1198#if EV_USE_KQUEUE
… …
1056#endif 1206#endif
1057#if EV_USE_SELECT 1207#if EV_USE_SELECT
1058 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1208 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1059#endif 1209#endif
1060 1210
1061 ev_init (&sigev, sigcb); 1211 ev_init (&pipeev, pipecb);
1062 ev_set_priority (&sigev, EV_MAXPRI); 1212 ev_set_priority (&pipeev, EV_MAXPRI);
1063 } 1213 }
1064} 1214}
1065 1215
1066static void noinline 1216static void noinline
1067loop_destroy (EV_P) 1217loop_destroy (EV_P)
1068{ 1218{
1069 int i; 1219 int i;
1220
1221 if (ev_is_active (&pipeev))
1222 {
1223 ev_ref (EV_A); /* signal watcher */
1224 ev_io_stop (EV_A_ &pipeev);
1225
1226#if EV_USE_EVENTFD
1227 if (evfd >= 0)
1228 close (evfd);
1229#endif
1230
1231 if (evpipe [0] >= 0)
1232 {
1233 close (evpipe [0]);
1234 close (evpipe [1]);
1235 }
1236 }
1070 1237
1071#if EV_USE_INOTIFY 1238#if EV_USE_INOTIFY
1072 if (fs_fd >= 0) 1239 if (fs_fd >= 0)
1073 close (fs_fd); 1240 close (fs_fd);
1074#endif 1241#endif
… …
1111#if EV_FORK_ENABLE 1278#if EV_FORK_ENABLE
1112 array_free (fork, EMPTY); 1279 array_free (fork, EMPTY);
1113#endif 1280#endif
1114 array_free (prepare, EMPTY); 1281 array_free (prepare, EMPTY);
1115 array_free (check, EMPTY); 1282 array_free (check, EMPTY);
1283#if EV_ASYNC_ENABLE
1284 array_free (async, EMPTY);
1285#endif
1116 1286
1117 backend = 0; 1287 backend = 0;
1118} 1288}
1119 1289
1290#if EV_USE_INOTIFY
1120void inline_size infy_fork (EV_P); 1291void inline_size infy_fork (EV_P);
1292#endif
1121 1293
1122void inline_size 1294void inline_size
1123loop_fork (EV_P) 1295loop_fork (EV_P)
1124{ 1296{
1125#if EV_USE_PORT 1297#if EV_USE_PORT
… …
1133#endif 1305#endif
1134#if EV_USE_INOTIFY 1306#if EV_USE_INOTIFY
1135 infy_fork (EV_A); 1307 infy_fork (EV_A);
1136#endif 1308#endif
1137 1309
1138 if (ev_is_active (&sigev)) 1310 if (ev_is_active (&pipeev))
1139 { 1311 {
1140 /* default loop */ 1312 /* this "locks" the handlers against writing to the pipe */
1313 /* while we modify the fd vars */
1314 gotsig = 1;
1315#if EV_ASYNC_ENABLE
1316 gotasync = 1;
1317#endif
1141 1318
1142 ev_ref (EV_A); 1319 ev_ref (EV_A);
1143 ev_io_stop (EV_A_ &sigev); 1320 ev_io_stop (EV_A_ &pipeev);
1321
1322#if EV_USE_EVENTFD
1323 if (evfd >= 0)
1324 close (evfd);
1325#endif
1326
1327 if (evpipe [0] >= 0)
1328 {
1144 close (sigpipe [0]); 1329 close (evpipe [0]);
1145 close (sigpipe [1]); 1330 close (evpipe [1]);
1331 }
1146 1332
1147 while (pipe (sigpipe))
1148 syserr ("(libev) error creating pipe");
1149
1150 siginit (EV_A); 1333 evpipe_init (EV_A);
1334 /* now iterate over everything, in case we missed something */
1335 pipecb (EV_A_ &pipeev, EV_READ);
1151 } 1336 }
1152 1337
1153 postfork = 0; 1338 postfork = 0;
1154} 1339}
1155 1340
… …
1177} 1362}
1178 1363
1179void 1364void
1180ev_loop_fork (EV_P) 1365ev_loop_fork (EV_P)
1181{ 1366{
1182 postfork = 1; 1367 postfork = 1; /* must be in line with ev_default_fork */
1183} 1368}
1184 1369
1185#endif 1370#endif
1186 1371
1187#if EV_MULTIPLICITY 1372#if EV_MULTIPLICITY
… …
1190#else 1375#else
1191int 1376int
1192ev_default_loop (unsigned int flags) 1377ev_default_loop (unsigned int flags)
1193#endif 1378#endif
1194{ 1379{
1195 if (sigpipe [0] == sigpipe [1])
1196 if (pipe (sigpipe))
1197 return 0;
1198
1199 if (!ev_default_loop_ptr) 1380 if (!ev_default_loop_ptr)
1200 { 1381 {
1201#if EV_MULTIPLICITY 1382#if EV_MULTIPLICITY
1202 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1383 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1203#else 1384#else
… …
1206 1387
1207 loop_init (EV_A_ flags); 1388 loop_init (EV_A_ flags);
1208 1389
1209 if (ev_backend (EV_A)) 1390 if (ev_backend (EV_A))
1210 { 1391 {
1211 siginit (EV_A);
1212
1213#ifndef _WIN32 1392#ifndef _WIN32
1214 ev_signal_init (&childev, childcb, SIGCHLD); 1393 ev_signal_init (&childev, childcb, SIGCHLD);
1215 ev_set_priority (&childev, EV_MAXPRI); 1394 ev_set_priority (&childev, EV_MAXPRI);
1216 ev_signal_start (EV_A_ &childev); 1395 ev_signal_start (EV_A_ &childev);
1217 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1396 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1234#ifndef _WIN32 1413#ifndef _WIN32
1235 ev_ref (EV_A); /* child watcher */ 1414 ev_ref (EV_A); /* child watcher */
1236 ev_signal_stop (EV_A_ &childev); 1415 ev_signal_stop (EV_A_ &childev);
1237#endif 1416#endif
1238 1417
1239 ev_ref (EV_A); /* signal watcher */
1240 ev_io_stop (EV_A_ &sigev);
1241
1242 close (sigpipe [0]); sigpipe [0] = 0;
1243 close (sigpipe [1]); sigpipe [1] = 0;
1244
1245 loop_destroy (EV_A); 1418 loop_destroy (EV_A);
1246} 1419}
1247 1420
1248void 1421void
1249ev_default_fork (void) 1422ev_default_fork (void)
… …
1251#if EV_MULTIPLICITY 1424#if EV_MULTIPLICITY
1252 struct ev_loop *loop = ev_default_loop_ptr; 1425 struct ev_loop *loop = ev_default_loop_ptr;
1253#endif 1426#endif
1254 1427
1255 if (backend) 1428 if (backend)
1256 postfork = 1; 1429 postfork = 1; /* must be in line with ev_loop_fork */
1257} 1430}
1258 1431
1259/*****************************************************************************/ 1432/*****************************************************************************/
1260 1433
1261void 1434void
… …
1470static int loop_done; 1643static int loop_done;
1471 1644
1472void 1645void
1473ev_loop (EV_P_ int flags) 1646ev_loop (EV_P_ int flags)
1474{ 1647{
1475 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 1648 loop_done = EVUNLOOP_CANCEL;
1476 ? EVUNLOOP_ONE
1477 : EVUNLOOP_CANCEL;
1478 1649
1479 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 1650 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1480 1651
1481 do 1652 do
1482 { 1653 {
… …
1578 /* queue check watchers, to be executed first */ 1749 /* queue check watchers, to be executed first */
1579 if (expect_false (checkcnt)) 1750 if (expect_false (checkcnt))
1580 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1751 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1581 1752
1582 call_pending (EV_A); 1753 call_pending (EV_A);
1583
1584 } 1754 }
1585 while (expect_true (activecnt && !loop_done)); 1755 while (expect_true (
1756 activecnt
1757 && !loop_done
1758 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1759 ));
1586 1760
1587 if (loop_done == EVUNLOOP_ONE) 1761 if (loop_done == EVUNLOOP_ONE)
1588 loop_done = EVUNLOOP_CANCEL; 1762 loop_done = EVUNLOOP_CANCEL;
1589} 1763}
1590 1764
… …
1836 if (expect_false (ev_is_active (w))) 2010 if (expect_false (ev_is_active (w)))
1837 return; 2011 return;
1838 2012
1839 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2013 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1840 2014
2015 evpipe_init (EV_A);
2016
1841 { 2017 {
1842#ifndef _WIN32 2018#ifndef _WIN32
1843 sigset_t full, prev; 2019 sigset_t full, prev;
1844 sigfillset (&full); 2020 sigfillset (&full);
1845 sigprocmask (SIG_SETMASK, &full, &prev); 2021 sigprocmask (SIG_SETMASK, &full, &prev);
… …
1856 wlist_add (&signals [w->signum - 1].head, (WL)w); 2032 wlist_add (&signals [w->signum - 1].head, (WL)w);
1857 2033
1858 if (!((WL)w)->next) 2034 if (!((WL)w)->next)
1859 { 2035 {
1860#if _WIN32 2036#if _WIN32
1861 signal (w->signum, sighandler); 2037 signal (w->signum, ev_sighandler);
1862#else 2038#else
1863 struct sigaction sa; 2039 struct sigaction sa;
1864 sa.sa_handler = sighandler; 2040 sa.sa_handler = ev_sighandler;
1865 sigfillset (&sa.sa_mask); 2041 sigfillset (&sa.sa_mask);
1866 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2042 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1867 sigaction (w->signum, &sa, 0); 2043 sigaction (w->signum, &sa, 0);
1868#endif 2044#endif
1869 } 2045 }
… …
2264 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 2440 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2265 2441
2266 if (ev_cb (w)) 2442 if (ev_cb (w))
2267 ev_feed_event (EV_A_ (W)w, EV_EMBED); 2443 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2268 else 2444 else
2269 ev_embed_sweep (loop, w); 2445 ev_loop (w->other, EVLOOP_NONBLOCK);
2270} 2446}
2271 2447
2272static void 2448static void
2273embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 2449embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2274{ 2450{
2275 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 2451 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2276 2452
2277 fd_reify (w->other); 2453 {
2454 struct ev_loop *loop = w->other;
2455
2456 while (fdchangecnt)
2457 {
2458 fd_reify (EV_A);
2459 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2460 }
2461 }
2278} 2462}
2463
2464#if 0
2465static void
2466embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2467{
2468 ev_idle_stop (EV_A_ idle);
2469}
2470#endif
2279 2471
2280void 2472void
2281ev_embed_start (EV_P_ ev_embed *w) 2473ev_embed_start (EV_P_ ev_embed *w)
2282{ 2474{
2283 if (expect_false (ev_is_active (w))) 2475 if (expect_false (ev_is_active (w)))
… …
2294 2486
2295 ev_prepare_init (&w->prepare, embed_prepare_cb); 2487 ev_prepare_init (&w->prepare, embed_prepare_cb);
2296 ev_set_priority (&w->prepare, EV_MINPRI); 2488 ev_set_priority (&w->prepare, EV_MINPRI);
2297 ev_prepare_start (EV_A_ &w->prepare); 2489 ev_prepare_start (EV_A_ &w->prepare);
2298 2490
2491 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2492
2299 ev_start (EV_A_ (W)w, 1); 2493 ev_start (EV_A_ (W)w, 1);
2300} 2494}
2301 2495
2302void 2496void
2303ev_embed_stop (EV_P_ ev_embed *w) 2497ev_embed_stop (EV_P_ ev_embed *w)
… …
2340 2534
2341 ev_stop (EV_A_ (W)w); 2535 ev_stop (EV_A_ (W)w);
2342} 2536}
2343#endif 2537#endif
2344 2538
2539#if EV_ASYNC_ENABLE
2540void
2541ev_async_start (EV_P_ ev_async *w)
2542{
2543 if (expect_false (ev_is_active (w)))
2544 return;
2545
2546 evpipe_init (EV_A);
2547
2548 ev_start (EV_A_ (W)w, ++asynccnt);
2549 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2550 asyncs [asynccnt - 1] = w;
2551}
2552
2553void
2554ev_async_stop (EV_P_ ev_async *w)
2555{
2556 clear_pending (EV_A_ (W)w);
2557 if (expect_false (!ev_is_active (w)))
2558 return;
2559
2560 {
2561 int active = ((W)w)->active;
2562 asyncs [active - 1] = asyncs [--asynccnt];
2563 ((W)asyncs [active - 1])->active = active;
2564 }
2565
2566 ev_stop (EV_A_ (W)w);
2567}
2568
2569void
2570ev_async_send (EV_P_ ev_async *w)
2571{
2572 w->sent = 1;
2573 evpipe_write (EV_A_ &gotasync);
2574}
2575#endif
2576
2345/*****************************************************************************/ 2577/*****************************************************************************/
2346 2578
2347struct ev_once 2579struct ev_once
2348{ 2580{
2349 ev_io io; 2581 ev_io io;

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