ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.199 by root, Tue Dec 25 07:05:45 2007 UTC vs.
Revision 1.207 by root, Thu Jan 31 13:10:56 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 modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
… …
291typedef ev_watcher_time *WT; 291typedef ev_watcher_time *WT;
292 292
293#if EV_USE_MONOTONIC 293#if EV_USE_MONOTONIC
294/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 294/* sig_atomic_t is used to avoid per-thread variables or locking but still */
295/* giving it a reasonably high chance of working on typical architetcures */ 295/* giving it a reasonably high chance of working on typical architetcures */
296static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 296static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
297#endif 297#endif
298 298
299#ifdef _WIN32 299#ifdef _WIN32
300# include "ev_win32.c" 300# include "ev_win32.c"
301#endif 301#endif
… …
600 600
601#if EV_SELECT_IS_WINSOCKET 601#if EV_SELECT_IS_WINSOCKET
602 if (events) 602 if (events)
603 { 603 {
604 unsigned long argp; 604 unsigned long argp;
605 #ifdef EV_FD_TO_WIN32_HANDLE
606 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
607 #else
605 anfd->handle = _get_osfhandle (fd); 608 anfd->handle = _get_osfhandle (fd);
609 #endif
606 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 610 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
607 } 611 }
608#endif 612#endif
609 613
610 { 614 {
… …
759/*****************************************************************************/ 763/*****************************************************************************/
760 764
761typedef struct 765typedef struct
762{ 766{
763 WL head; 767 WL head;
764 sig_atomic_t volatile gotsig; 768 EV_ATOMIC_T gotsig;
765} ANSIG; 769} ANSIG;
766 770
767static ANSIG *signals; 771static ANSIG *signals;
768static int signalmax; 772static int signalmax;
769 773
770static int sigpipe [2]; 774static EV_ATOMIC_T gotsig;
771static sig_atomic_t volatile gotsig;
772static ev_io sigev;
773 775
774void inline_size 776void inline_size
775signals_init (ANSIG *base, int count) 777signals_init (ANSIG *base, int count)
776{ 778{
777 while (count--) 779 while (count--)
… …
781 783
782 ++base; 784 ++base;
783 } 785 }
784} 786}
785 787
786static void 788/*****************************************************************************/
787sighandler (int signum)
788{
789#if _WIN32
790 signal (signum, sighandler);
791#endif
792
793 signals [signum - 1].gotsig = 1;
794
795 if (!gotsig)
796 {
797 int old_errno = errno;
798 gotsig = 1;
799 write (sigpipe [1], &signum, 1);
800 errno = old_errno;
801 }
802}
803
804void noinline
805ev_feed_signal_event (EV_P_ int signum)
806{
807 WL w;
808
809#if EV_MULTIPLICITY
810 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
811#endif
812
813 --signum;
814
815 if (signum < 0 || signum >= signalmax)
816 return;
817
818 signals [signum].gotsig = 0;
819
820 for (w = signals [signum].head; w; w = w->next)
821 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
822}
823
824static void
825sigcb (EV_P_ ev_io *iow, int revents)
826{
827 int signum;
828
829 read (sigpipe [0], &revents, 1);
830 gotsig = 0;
831
832 for (signum = signalmax; signum--; )
833 if (signals [signum].gotsig)
834 ev_feed_signal_event (EV_A_ signum + 1);
835}
836 789
837void inline_speed 790void inline_speed
838fd_intern (int fd) 791fd_intern (int fd)
839{ 792{
840#ifdef _WIN32 793#ifdef _WIN32
… …
845 fcntl (fd, F_SETFL, O_NONBLOCK); 798 fcntl (fd, F_SETFL, O_NONBLOCK);
846#endif 799#endif
847} 800}
848 801
849static void noinline 802static void noinline
850siginit (EV_P) 803evpipe_init (EV_P)
851{ 804{
805 if (!ev_is_active (&pipeev))
806 {
807 while (pipe (evpipe))
808 syserr ("(libev) error creating signal/async pipe");
809
852 fd_intern (sigpipe [0]); 810 fd_intern (evpipe [0]);
853 fd_intern (sigpipe [1]); 811 fd_intern (evpipe [1]);
854 812
855 ev_io_set (&sigev, sigpipe [0], EV_READ); 813 ev_io_set (&pipeev, evpipe [0], EV_READ);
856 ev_io_start (EV_A_ &sigev); 814 ev_io_start (EV_A_ &pipeev);
857 ev_unref (EV_A); /* child watcher should not keep loop alive */ 815 ev_unref (EV_A); /* child watcher should not keep loop alive */
816 }
817}
818
819void inline_size
820evpipe_write (EV_P_ int sig, int async)
821{
822 if (!(gotasync || gotsig))
823 {
824 int old_errno = errno;
825
826 if (sig) gotsig = 1;
827 if (async) gotasync = 1;
828
829 write (evpipe [1], &old_errno, 1);
830 errno = old_errno;
831 }
832}
833
834static void
835pipecb (EV_P_ ev_io *iow, int revents)
836{
837 {
838 int dummy;
839 read (evpipe [0], &dummy, 1);
840 }
841
842 if (gotsig)
843 {
844 int signum;
845 gotsig = 0;
846
847 for (signum = signalmax; signum--; )
848 if (signals [signum].gotsig)
849 ev_feed_signal_event (EV_A_ signum + 1);
850 }
851
852 if (gotasync)
853 {
854 int i;
855 gotasync = 0;
856
857 for (i = asynccnt; i--; )
858 if (asyncs [i]->sent)
859 {
860 asyncs [i]->sent = 0;
861 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
862 }
863 }
858} 864}
859 865
860/*****************************************************************************/ 866/*****************************************************************************/
861 867
868static void
869sighandler (int signum)
870{
871#if EV_MULTIPLICITY
872 struct ev_loop *loop = &default_loop_struct;
873#endif
874
875#if _WIN32
876 signal (signum, sighandler);
877#endif
878
879 signals [signum - 1].gotsig = 1;
880 evpipe_write (EV_A_ 1, 0);
881}
882
883void noinline
884ev_feed_signal_event (EV_P_ int signum)
885{
886 WL w;
887
888#if EV_MULTIPLICITY
889 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
890#endif
891
892 --signum;
893
894 if (signum < 0 || signum >= signalmax)
895 return;
896
897 signals [signum].gotsig = 0;
898
899 for (w = signals [signum].head; w; w = w->next)
900 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
901}
902
903/*****************************************************************************/
904
862static WL childs [EV_PID_HASHSIZE]; 905static WL childs [EV_PID_HASHSIZE];
863 906
864#ifndef _WIN32 907#ifndef _WIN32
865 908
866static ev_signal childev; 909static ev_signal childev;
910
911#ifndef WIFCONTINUED
912# define WIFCONTINUED(status) 0
913#endif
867 914
868void inline_speed 915void inline_speed
869child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 916child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
870{ 917{
871 ev_child *w; 918 ev_child *w;
919 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
872 920
873 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 921 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
922 {
874 if (w->pid == pid || !w->pid) 923 if ((w->pid == pid || !w->pid)
924 && (!traced || (w->flags & 1)))
875 { 925 {
876 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 926 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
877 w->rpid = pid; 927 w->rpid = pid;
878 w->rstatus = status; 928 w->rstatus = status;
879 ev_feed_event (EV_A_ (W)w, EV_CHILD); 929 ev_feed_event (EV_A_ (W)w, EV_CHILD);
880 } 930 }
931 }
881} 932}
882 933
883#ifndef WCONTINUED 934#ifndef WCONTINUED
884# define WCONTINUED 0 935# define WCONTINUED 0
885#endif 936#endif
… …
1072#endif 1123#endif
1073#if EV_USE_SELECT 1124#if EV_USE_SELECT
1074 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1125 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1075#endif 1126#endif
1076 1127
1077 ev_init (&sigev, sigcb); 1128 ev_init (&pipeev, pipecb);
1078 ev_set_priority (&sigev, EV_MAXPRI); 1129 ev_set_priority (&pipeev, EV_MAXPRI);
1079 } 1130 }
1080} 1131}
1081 1132
1082static void noinline 1133static void noinline
1083loop_destroy (EV_P) 1134loop_destroy (EV_P)
1084{ 1135{
1085 int i; 1136 int i;
1137
1138 if (ev_is_active (&pipeev))
1139 {
1140 ev_ref (EV_A); /* signal watcher */
1141 ev_io_stop (EV_A_ &pipeev);
1142
1143 close (evpipe [0]); evpipe [0] = 0;
1144 close (evpipe [1]); evpipe [1] = 0;
1145 }
1086 1146
1087#if EV_USE_INOTIFY 1147#if EV_USE_INOTIFY
1088 if (fs_fd >= 0) 1148 if (fs_fd >= 0)
1089 close (fs_fd); 1149 close (fs_fd);
1090#endif 1150#endif
… …
1149#endif 1209#endif
1150#if EV_USE_INOTIFY 1210#if EV_USE_INOTIFY
1151 infy_fork (EV_A); 1211 infy_fork (EV_A);
1152#endif 1212#endif
1153 1213
1154 if (ev_is_active (&sigev)) 1214 if (ev_is_active (&pipeev))
1155 { 1215 {
1156 /* default loop */ 1216 /* this "locks" the handlers against writing to the pipe */
1217 gotsig = gotasync = 1;
1157 1218
1158 ev_ref (EV_A); 1219 ev_ref (EV_A);
1159 ev_io_stop (EV_A_ &sigev); 1220 ev_io_stop (EV_A_ &pipeev);
1160 close (sigpipe [0]); 1221 close (evpipe [0]);
1161 close (sigpipe [1]); 1222 close (evpipe [1]);
1162 1223
1163 while (pipe (sigpipe))
1164 syserr ("(libev) error creating pipe");
1165
1166 siginit (EV_A); 1224 evpipe_init (EV_A);
1225 /* now iterate over everything */
1226 evcb (EV_A_ &pipeev, EV_READ);
1167 } 1227 }
1168 1228
1169 postfork = 0; 1229 postfork = 0;
1170} 1230}
1171 1231
… …
1193} 1253}
1194 1254
1195void 1255void
1196ev_loop_fork (EV_P) 1256ev_loop_fork (EV_P)
1197{ 1257{
1198 postfork = 1; 1258 postfork = 1; /* must be in line with ev_default_fork */
1199} 1259}
1200 1260
1201#endif 1261#endif
1202 1262
1203#if EV_MULTIPLICITY 1263#if EV_MULTIPLICITY
… …
1206#else 1266#else
1207int 1267int
1208ev_default_loop (unsigned int flags) 1268ev_default_loop (unsigned int flags)
1209#endif 1269#endif
1210{ 1270{
1211 if (sigpipe [0] == sigpipe [1])
1212 if (pipe (sigpipe))
1213 return 0;
1214
1215 if (!ev_default_loop_ptr) 1271 if (!ev_default_loop_ptr)
1216 { 1272 {
1217#if EV_MULTIPLICITY 1273#if EV_MULTIPLICITY
1218 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1274 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1219#else 1275#else
… …
1222 1278
1223 loop_init (EV_A_ flags); 1279 loop_init (EV_A_ flags);
1224 1280
1225 if (ev_backend (EV_A)) 1281 if (ev_backend (EV_A))
1226 { 1282 {
1227 siginit (EV_A);
1228
1229#ifndef _WIN32 1283#ifndef _WIN32
1230 ev_signal_init (&childev, childcb, SIGCHLD); 1284 ev_signal_init (&childev, childcb, SIGCHLD);
1231 ev_set_priority (&childev, EV_MAXPRI); 1285 ev_set_priority (&childev, EV_MAXPRI);
1232 ev_signal_start (EV_A_ &childev); 1286 ev_signal_start (EV_A_ &childev);
1233 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1287 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1250#ifndef _WIN32 1304#ifndef _WIN32
1251 ev_ref (EV_A); /* child watcher */ 1305 ev_ref (EV_A); /* child watcher */
1252 ev_signal_stop (EV_A_ &childev); 1306 ev_signal_stop (EV_A_ &childev);
1253#endif 1307#endif
1254 1308
1255 ev_ref (EV_A); /* signal watcher */
1256 ev_io_stop (EV_A_ &sigev);
1257
1258 close (sigpipe [0]); sigpipe [0] = 0;
1259 close (sigpipe [1]); sigpipe [1] = 0;
1260
1261 loop_destroy (EV_A); 1309 loop_destroy (EV_A);
1262} 1310}
1263 1311
1264void 1312void
1265ev_default_fork (void) 1313ev_default_fork (void)
… …
1267#if EV_MULTIPLICITY 1315#if EV_MULTIPLICITY
1268 struct ev_loop *loop = ev_default_loop_ptr; 1316 struct ev_loop *loop = ev_default_loop_ptr;
1269#endif 1317#endif
1270 1318
1271 if (backend) 1319 if (backend)
1272 postfork = 1; 1320 postfork = 1; /* must be in line with ev_loop_fork */
1273} 1321}
1274 1322
1275/*****************************************************************************/ 1323/*****************************************************************************/
1276 1324
1277void 1325void
… …
1851#endif 1899#endif
1852 if (expect_false (ev_is_active (w))) 1900 if (expect_false (ev_is_active (w)))
1853 return; 1901 return;
1854 1902
1855 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 1903 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1904
1905 evpipe_init (EV_A);
1856 1906
1857 { 1907 {
1858#ifndef _WIN32 1908#ifndef _WIN32
1859 sigset_t full, prev; 1909 sigset_t full, prev;
1860 sigfillset (&full); 1910 sigfillset (&full);
… …
2374 2424
2375 ev_stop (EV_A_ (W)w); 2425 ev_stop (EV_A_ (W)w);
2376} 2426}
2377#endif 2427#endif
2378 2428
2429#if EV_ASYNC_ENABLE
2430void
2431ev_async_start (EV_P_ ev_async *w)
2432{
2433 if (expect_false (ev_is_active (w)))
2434 return;
2435
2436 evpipe_init (EV_A);
2437
2438 ev_start (EV_A_ (W)w, ++asynccnt);
2439 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2440 asyncs [asynccnt - 1] = w;
2441}
2442
2443void
2444ev_async_stop (EV_P_ ev_async *w)
2445{
2446 clear_pending (EV_A_ (W)w);
2447 if (expect_false (!ev_is_active (w)))
2448 return;
2449
2450 {
2451 int active = ((W)w)->active;
2452 asyncs [active - 1] = asyncs [--asynccnt];
2453 ((W)asyncs [active - 1])->active = active;
2454 }
2455
2456 ev_stop (EV_A_ (W)w);
2457}
2458
2459void
2460ev_async_send (EV_P_ ev_async *w)
2461{
2462 w->sent = 1;
2463 evpipe_write (EV_A_ 0, 1);
2464}
2465#endif
2466
2379/*****************************************************************************/ 2467/*****************************************************************************/
2380 2468
2381struct ev_once 2469struct ev_once
2382{ 2470{
2383 ev_io io; 2471 ev_io io;

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines