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Comparing libev/ev.c (file contents):
Revision 1.201 by root, Thu Dec 27 08:00:18 2007 UTC vs.
Revision 1.209 by root, Tue Feb 5 23:56:33 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
… …
763/*****************************************************************************/ 763/*****************************************************************************/
764 764
765typedef struct 765typedef struct
766{ 766{
767 WL head; 767 WL head;
768 sig_atomic_t volatile gotsig; 768 EV_ATOMIC_T gotsig;
769} ANSIG; 769} ANSIG;
770 770
771static ANSIG *signals; 771static ANSIG *signals;
772static int signalmax; 772static int signalmax;
773 773
774static int sigpipe [2]; 774static EV_ATOMIC_T gotsig;
775static sig_atomic_t volatile gotsig;
776static ev_io sigev;
777 775
778void inline_size 776void inline_size
779signals_init (ANSIG *base, int count) 777signals_init (ANSIG *base, int count)
780{ 778{
781 while (count--) 779 while (count--)
… …
785 783
786 ++base; 784 ++base;
787 } 785 }
788} 786}
789 787
790static void 788/*****************************************************************************/
791sighandler (int signum)
792{
793#if _WIN32
794 signal (signum, sighandler);
795#endif
796
797 signals [signum - 1].gotsig = 1;
798
799 if (!gotsig)
800 {
801 int old_errno = errno;
802 gotsig = 1;
803 write (sigpipe [1], &signum, 1);
804 errno = old_errno;
805 }
806}
807
808void noinline
809ev_feed_signal_event (EV_P_ int signum)
810{
811 WL w;
812
813#if EV_MULTIPLICITY
814 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
815#endif
816
817 --signum;
818
819 if (signum < 0 || signum >= signalmax)
820 return;
821
822 signals [signum].gotsig = 0;
823
824 for (w = signals [signum].head; w; w = w->next)
825 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
826}
827
828static void
829sigcb (EV_P_ ev_io *iow, int revents)
830{
831 int signum;
832
833 read (sigpipe [0], &revents, 1);
834 gotsig = 0;
835
836 for (signum = signalmax; signum--; )
837 if (signals [signum].gotsig)
838 ev_feed_signal_event (EV_A_ signum + 1);
839}
840 789
841void inline_speed 790void inline_speed
842fd_intern (int fd) 791fd_intern (int fd)
843{ 792{
844#ifdef _WIN32 793#ifdef _WIN32
… …
849 fcntl (fd, F_SETFL, O_NONBLOCK); 798 fcntl (fd, F_SETFL, O_NONBLOCK);
850#endif 799#endif
851} 800}
852 801
853static void noinline 802static void noinline
854siginit (EV_P) 803evpipe_init (EV_P)
855{ 804{
805 if (!ev_is_active (&pipeev))
806 {
807 while (pipe (evpipe))
808 syserr ("(libev) error creating signal/async pipe");
809
856 fd_intern (sigpipe [0]); 810 fd_intern (evpipe [0]);
857 fd_intern (sigpipe [1]); 811 fd_intern (evpipe [1]);
858 812
859 ev_io_set (&sigev, sigpipe [0], EV_READ); 813 ev_io_set (&pipeev, evpipe [0], EV_READ);
860 ev_io_start (EV_A_ &sigev); 814 ev_io_start (EV_A_ &pipeev);
861 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 EV_ASYNC_ENABLE
853 if (gotasync)
854 {
855 int i;
856 gotasync = 0;
857
858 for (i = asynccnt; i--; )
859 if (asyncs [i]->sent)
860 {
861 asyncs [i]->sent = 0;
862 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
863 }
864 }
865#endif
862} 866}
863 867
864/*****************************************************************************/ 868/*****************************************************************************/
865 869
870static void
871sighandler (int signum)
872{
873#if EV_MULTIPLICITY
874 struct ev_loop *loop = &default_loop_struct;
875#endif
876
877#if _WIN32
878 signal (signum, sighandler);
879#endif
880
881 signals [signum - 1].gotsig = 1;
882 evpipe_write (EV_A_ 1, 0);
883}
884
885void noinline
886ev_feed_signal_event (EV_P_ int signum)
887{
888 WL w;
889
890#if EV_MULTIPLICITY
891 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
892#endif
893
894 --signum;
895
896 if (signum < 0 || signum >= signalmax)
897 return;
898
899 signals [signum].gotsig = 0;
900
901 for (w = signals [signum].head; w; w = w->next)
902 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
903}
904
905/*****************************************************************************/
906
866static WL childs [EV_PID_HASHSIZE]; 907static WL childs [EV_PID_HASHSIZE];
867 908
868#ifndef _WIN32 909#ifndef _WIN32
869 910
870static ev_signal childev; 911static ev_signal childev;
912
913#ifndef WIFCONTINUED
914# define WIFCONTINUED(status) 0
915#endif
871 916
872void inline_speed 917void inline_speed
873child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 918child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
874{ 919{
875 ev_child *w; 920 ev_child *w;
921 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
876 922
877 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 923 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
924 {
878 if (w->pid == pid || !w->pid) 925 if ((w->pid == pid || !w->pid)
926 && (!traced || (w->flags & 1)))
879 { 927 {
880 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 928 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
881 w->rpid = pid; 929 w->rpid = pid;
882 w->rstatus = status; 930 w->rstatus = status;
883 ev_feed_event (EV_A_ (W)w, EV_CHILD); 931 ev_feed_event (EV_A_ (W)w, EV_CHILD);
884 } 932 }
933 }
885} 934}
886 935
887#ifndef WCONTINUED 936#ifndef WCONTINUED
888# define WCONTINUED 0 937# define WCONTINUED 0
889#endif 938#endif
… …
1032 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1081 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1033 have_monotonic = 1; 1082 have_monotonic = 1;
1034 } 1083 }
1035#endif 1084#endif
1036 1085
1037 ev_rt_now = ev_time (); 1086 ev_rt_now = ev_time ();
1038 mn_now = get_clock (); 1087 mn_now = get_clock ();
1039 now_floor = mn_now; 1088 now_floor = mn_now;
1040 rtmn_diff = ev_rt_now - mn_now; 1089 rtmn_diff = ev_rt_now - mn_now;
1041 1090
1042 io_blocktime = 0.; 1091 io_blocktime = 0.;
1043 timeout_blocktime = 0.; 1092 timeout_blocktime = 0.;
1093 backend = 0;
1094 backend_fd = -1;
1095 gotasync = 0;
1096#if EV_USE_INOTIFY
1097 fs_fd = -2;
1098#endif
1044 1099
1045 /* pid check not overridable via env */ 1100 /* pid check not overridable via env */
1046#ifndef _WIN32 1101#ifndef _WIN32
1047 if (flags & EVFLAG_FORKCHECK) 1102 if (flags & EVFLAG_FORKCHECK)
1048 curpid = getpid (); 1103 curpid = getpid ();
… …
1054 flags = atoi (getenv ("LIBEV_FLAGS")); 1109 flags = atoi (getenv ("LIBEV_FLAGS"));
1055 1110
1056 if (!(flags & 0x0000ffffUL)) 1111 if (!(flags & 0x0000ffffUL))
1057 flags |= ev_recommended_backends (); 1112 flags |= ev_recommended_backends ();
1058 1113
1059 backend = 0;
1060 backend_fd = -1;
1061#if EV_USE_INOTIFY
1062 fs_fd = -2;
1063#endif
1064
1065#if EV_USE_PORT 1114#if EV_USE_PORT
1066 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1115 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1067#endif 1116#endif
1068#if EV_USE_KQUEUE 1117#if EV_USE_KQUEUE
1069 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1118 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1076#endif 1125#endif
1077#if EV_USE_SELECT 1126#if EV_USE_SELECT
1078 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1127 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1079#endif 1128#endif
1080 1129
1081 ev_init (&sigev, sigcb); 1130 ev_init (&pipeev, pipecb);
1082 ev_set_priority (&sigev, EV_MAXPRI); 1131 ev_set_priority (&pipeev, EV_MAXPRI);
1083 } 1132 }
1084} 1133}
1085 1134
1086static void noinline 1135static void noinline
1087loop_destroy (EV_P) 1136loop_destroy (EV_P)
1088{ 1137{
1089 int i; 1138 int i;
1139
1140 if (ev_is_active (&pipeev))
1141 {
1142 ev_ref (EV_A); /* signal watcher */
1143 ev_io_stop (EV_A_ &pipeev);
1144
1145 close (evpipe [0]); evpipe [0] = 0;
1146 close (evpipe [1]); evpipe [1] = 0;
1147 }
1090 1148
1091#if EV_USE_INOTIFY 1149#if EV_USE_INOTIFY
1092 if (fs_fd >= 0) 1150 if (fs_fd >= 0)
1093 close (fs_fd); 1151 close (fs_fd);
1094#endif 1152#endif
… …
1131#if EV_FORK_ENABLE 1189#if EV_FORK_ENABLE
1132 array_free (fork, EMPTY); 1190 array_free (fork, EMPTY);
1133#endif 1191#endif
1134 array_free (prepare, EMPTY); 1192 array_free (prepare, EMPTY);
1135 array_free (check, EMPTY); 1193 array_free (check, EMPTY);
1194#if EV_ASYNC_ENABLE
1195 array_free (async, EMPTY);
1196#endif
1136 1197
1137 backend = 0; 1198 backend = 0;
1138} 1199}
1139 1200
1140void inline_size infy_fork (EV_P); 1201void inline_size infy_fork (EV_P);
… …
1153#endif 1214#endif
1154#if EV_USE_INOTIFY 1215#if EV_USE_INOTIFY
1155 infy_fork (EV_A); 1216 infy_fork (EV_A);
1156#endif 1217#endif
1157 1218
1158 if (ev_is_active (&sigev)) 1219 if (ev_is_active (&pipeev))
1159 { 1220 {
1160 /* default loop */ 1221 /* this "locks" the handlers against writing to the pipe */
1222 gotsig = gotasync = 1;
1161 1223
1162 ev_ref (EV_A); 1224 ev_ref (EV_A);
1163 ev_io_stop (EV_A_ &sigev); 1225 ev_io_stop (EV_A_ &pipeev);
1164 close (sigpipe [0]); 1226 close (evpipe [0]);
1165 close (sigpipe [1]); 1227 close (evpipe [1]);
1166 1228
1167 while (pipe (sigpipe))
1168 syserr ("(libev) error creating pipe");
1169
1170 siginit (EV_A); 1229 evpipe_init (EV_A);
1230 /* now iterate over everything, in case we missed something */
1231 pipecb (EV_A_ &pipeev, EV_READ);
1171 } 1232 }
1172 1233
1173 postfork = 0; 1234 postfork = 0;
1174} 1235}
1175 1236
… …
1197} 1258}
1198 1259
1199void 1260void
1200ev_loop_fork (EV_P) 1261ev_loop_fork (EV_P)
1201{ 1262{
1202 postfork = 1; 1263 postfork = 1; /* must be in line with ev_default_fork */
1203} 1264}
1204 1265
1205#endif 1266#endif
1206 1267
1207#if EV_MULTIPLICITY 1268#if EV_MULTIPLICITY
… …
1210#else 1271#else
1211int 1272int
1212ev_default_loop (unsigned int flags) 1273ev_default_loop (unsigned int flags)
1213#endif 1274#endif
1214{ 1275{
1215 if (sigpipe [0] == sigpipe [1])
1216 if (pipe (sigpipe))
1217 return 0;
1218
1219 if (!ev_default_loop_ptr) 1276 if (!ev_default_loop_ptr)
1220 { 1277 {
1221#if EV_MULTIPLICITY 1278#if EV_MULTIPLICITY
1222 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1279 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1223#else 1280#else
… …
1226 1283
1227 loop_init (EV_A_ flags); 1284 loop_init (EV_A_ flags);
1228 1285
1229 if (ev_backend (EV_A)) 1286 if (ev_backend (EV_A))
1230 { 1287 {
1231 siginit (EV_A);
1232
1233#ifndef _WIN32 1288#ifndef _WIN32
1234 ev_signal_init (&childev, childcb, SIGCHLD); 1289 ev_signal_init (&childev, childcb, SIGCHLD);
1235 ev_set_priority (&childev, EV_MAXPRI); 1290 ev_set_priority (&childev, EV_MAXPRI);
1236 ev_signal_start (EV_A_ &childev); 1291 ev_signal_start (EV_A_ &childev);
1237 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1292 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1254#ifndef _WIN32 1309#ifndef _WIN32
1255 ev_ref (EV_A); /* child watcher */ 1310 ev_ref (EV_A); /* child watcher */
1256 ev_signal_stop (EV_A_ &childev); 1311 ev_signal_stop (EV_A_ &childev);
1257#endif 1312#endif
1258 1313
1259 ev_ref (EV_A); /* signal watcher */
1260 ev_io_stop (EV_A_ &sigev);
1261
1262 close (sigpipe [0]); sigpipe [0] = 0;
1263 close (sigpipe [1]); sigpipe [1] = 0;
1264
1265 loop_destroy (EV_A); 1314 loop_destroy (EV_A);
1266} 1315}
1267 1316
1268void 1317void
1269ev_default_fork (void) 1318ev_default_fork (void)
… …
1271#if EV_MULTIPLICITY 1320#if EV_MULTIPLICITY
1272 struct ev_loop *loop = ev_default_loop_ptr; 1321 struct ev_loop *loop = ev_default_loop_ptr;
1273#endif 1322#endif
1274 1323
1275 if (backend) 1324 if (backend)
1276 postfork = 1; 1325 postfork = 1; /* must be in line with ev_loop_fork */
1277} 1326}
1278 1327
1279/*****************************************************************************/ 1328/*****************************************************************************/
1280 1329
1281void 1330void
… …
1309{ 1358{
1310 while (timercnt && ((WT)timers [0])->at <= mn_now) 1359 while (timercnt && ((WT)timers [0])->at <= mn_now)
1311 { 1360 {
1312 ev_timer *w = (ev_timer *)timers [0]; 1361 ev_timer *w = (ev_timer *)timers [0];
1313 1362
1314 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1363 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1315 1364
1316 /* first reschedule or stop timer */ 1365 /* first reschedule or stop timer */
1317 if (w->repeat) 1366 if (w->repeat)
1318 { 1367 {
1319 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1368 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
… …
1855#endif 1904#endif
1856 if (expect_false (ev_is_active (w))) 1905 if (expect_false (ev_is_active (w)))
1857 return; 1906 return;
1858 1907
1859 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 1908 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1909
1910 evpipe_init (EV_A);
1860 1911
1861 { 1912 {
1862#ifndef _WIN32 1913#ifndef _WIN32
1863 sigset_t full, prev; 1914 sigset_t full, prev;
1864 sigfillset (&full); 1915 sigfillset (&full);
… …
2378 2429
2379 ev_stop (EV_A_ (W)w); 2430 ev_stop (EV_A_ (W)w);
2380} 2431}
2381#endif 2432#endif
2382 2433
2434#if EV_ASYNC_ENABLE
2435void
2436ev_async_start (EV_P_ ev_async *w)
2437{
2438 if (expect_false (ev_is_active (w)))
2439 return;
2440
2441 evpipe_init (EV_A);
2442
2443 ev_start (EV_A_ (W)w, ++asynccnt);
2444 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2445 asyncs [asynccnt - 1] = w;
2446}
2447
2448void
2449ev_async_stop (EV_P_ ev_async *w)
2450{
2451 clear_pending (EV_A_ (W)w);
2452 if (expect_false (!ev_is_active (w)))
2453 return;
2454
2455 {
2456 int active = ((W)w)->active;
2457 asyncs [active - 1] = asyncs [--asynccnt];
2458 ((W)asyncs [active - 1])->active = active;
2459 }
2460
2461 ev_stop (EV_A_ (W)w);
2462}
2463
2464void
2465ev_async_send (EV_P_ ev_async *w)
2466{
2467 w->sent = 1;
2468 evpipe_write (EV_A_ 0, 1);
2469}
2470#endif
2471
2383/*****************************************************************************/ 2472/*****************************************************************************/
2384 2473
2385struct ev_once 2474struct ev_once
2386{ 2475{
2387 ev_io io; 2476 ev_io io;

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