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Comparing libev/ev.c (file contents):
Revision 1.207 by root, Thu Jan 31 13:10:56 2008 UTC vs.
Revision 1.223 by root, Sun Apr 6 14:34:50 2008 UTC

… …
39 39
40#ifdef __cplusplus 40#ifdef __cplusplus
41extern "C" { 41extern "C" {
42#endif 42#endif
43 43
44/* this big block deduces configuration from config.h */
44#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
45# ifdef EV_CONFIG_H 46# ifdef EV_CONFIG_H
46# include EV_CONFIG_H 47# include EV_CONFIG_H
47# else 48# else
48# include "config.h" 49# include "config.h"
… …
118# else 119# else
119# define EV_USE_INOTIFY 0 120# define EV_USE_INOTIFY 0
120# endif 121# endif
121# endif 122# endif
122 123
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
123#endif 132#endif
124 133
125#include <math.h> 134#include <math.h>
126#include <stdlib.h> 135#include <stdlib.h>
127#include <fcntl.h> 136#include <fcntl.h>
… …
152# ifndef EV_SELECT_IS_WINSOCKET 161# ifndef EV_SELECT_IS_WINSOCKET
153# define EV_SELECT_IS_WINSOCKET 1 162# define EV_SELECT_IS_WINSOCKET 1
154# endif 163# endif
155#endif 164#endif
156 165
157/**/ 166/* this block tries to deduce configuration from header-defined symbols and defaults */
158 167
159#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
160# define EV_USE_MONOTONIC 0 169# define EV_USE_MONOTONIC 0
161#endif 170#endif
162 171
… …
179# define EV_USE_POLL 1 188# define EV_USE_POLL 1
180# endif 189# endif
181#endif 190#endif
182 191
183#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
184# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
185#endif 198#endif
186 199
187#ifndef EV_USE_KQUEUE 200#ifndef EV_USE_KQUEUE
188# define EV_USE_KQUEUE 0 201# define EV_USE_KQUEUE 0
189#endif 202#endif
… …
191#ifndef EV_USE_PORT 204#ifndef EV_USE_PORT
192# define EV_USE_PORT 0 205# define EV_USE_PORT 0
193#endif 206#endif
194 207
195#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
196# define EV_USE_INOTIFY 0 212# define EV_USE_INOTIFY 0
213# endif
197#endif 214#endif
198 215
199#ifndef EV_PID_HASHSIZE 216#ifndef EV_PID_HASHSIZE
200# if EV_MINIMAL 217# if EV_MINIMAL
201# define EV_PID_HASHSIZE 1 218# define EV_PID_HASHSIZE 1
… …
210# else 227# else
211# define EV_INOTIFY_HASHSIZE 16 228# define EV_INOTIFY_HASHSIZE 16
212# endif 229# endif
213#endif 230#endif
214 231
215/**/ 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 */
216 241
217#ifndef CLOCK_MONOTONIC 242#ifndef CLOCK_MONOTONIC
218# undef EV_USE_MONOTONIC 243# undef EV_USE_MONOTONIC
219# define EV_USE_MONOTONIC 0 244# define EV_USE_MONOTONIC 0
220#endif 245#endif
… …
239# include <sys/inotify.h> 264# include <sys/inotify.h>
240#endif 265#endif
241 266
242#if EV_SELECT_IS_WINSOCKET 267#if EV_SELECT_IS_WINSOCKET
243# 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
244#endif 281#endif
245 282
246/**/ 283/**/
247 284
248/* 285/*
… …
263# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
264# define noinline __attribute__ ((noinline)) 301# define noinline __attribute__ ((noinline))
265#else 302#else
266# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
267# define noinline 304# define noinline
268# if __STDC_VERSION__ < 199901L 305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
269# define inline 306# define inline
270# endif 307# endif
271#endif 308#endif
272 309
273#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
… …
451 ts.tv_sec = (time_t)delay; 488 ts.tv_sec = (time_t)delay;
452 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9); 489 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
453 490
454 nanosleep (&ts, 0); 491 nanosleep (&ts, 0);
455#elif defined(_WIN32) 492#elif defined(_WIN32)
456 Sleep (delay * 1e3); 493 Sleep ((unsigned long)(delay * 1e3));
457#else 494#else
458 struct timeval tv; 495 struct timeval tv;
459 496
460 tv.tv_sec = (time_t)delay; 497 tv.tv_sec = (time_t)delay;
461 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 498 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
… …
802static void noinline 839static void noinline
803evpipe_init (EV_P) 840evpipe_init (EV_P)
804{ 841{
805 if (!ev_is_active (&pipeev)) 842 if (!ev_is_active (&pipeev))
806 { 843 {
844#if EV_USE_EVENTFD
845 if ((evfd = eventfd (0, 0)) >= 0)
846 {
847 evpipe [0] = -1;
848 fd_intern (evfd);
849 ev_io_set (&pipeev, evfd, EV_READ);
850 }
851 else
852#endif
853 {
807 while (pipe (evpipe)) 854 while (pipe (evpipe))
808 syserr ("(libev) error creating signal/async pipe"); 855 syserr ("(libev) error creating signal/async pipe");
809 856
810 fd_intern (evpipe [0]); 857 fd_intern (evpipe [0]);
811 fd_intern (evpipe [1]); 858 fd_intern (evpipe [1]);
812
813 ev_io_set (&pipeev, evpipe [0], EV_READ); 859 ev_io_set (&pipeev, evpipe [0], EV_READ);
860 }
861
814 ev_io_start (EV_A_ &pipeev); 862 ev_io_start (EV_A_ &pipeev);
815 ev_unref (EV_A); /* child watcher should not keep loop alive */ 863 ev_unref (EV_A); /* watcher should not keep loop alive */
816 } 864 }
817} 865}
818 866
819void inline_size 867void inline_size
820evpipe_write (EV_P_ int sig, int async) 868evpipe_write (EV_P_ EV_ATOMIC_T *flag)
821{ 869{
822 if (!(gotasync || gotsig)) 870 if (!*flag)
823 { 871 {
824 int old_errno = errno; 872 int old_errno = errno; /* save errno because write might clobber it */
825 873
826 if (sig) gotsig = 1; 874 *flag = 1;
827 if (async) gotasync = 1;
828 875
876#if EV_USE_EVENTFD
877 if (evfd >= 0)
878 {
879 uint64_t counter = 1;
880 write (evfd, &counter, sizeof (uint64_t));
881 }
882 else
883#endif
829 write (evpipe [1], &old_errno, 1); 884 write (evpipe [1], &old_errno, 1);
885
830 errno = old_errno; 886 errno = old_errno;
831 } 887 }
832} 888}
833 889
834static void 890static void
835pipecb (EV_P_ ev_io *iow, int revents) 891pipecb (EV_P_ ev_io *iow, int revents)
836{ 892{
893#if EV_USE_EVENTFD
894 if (evfd >= 0)
837 { 895 {
838 int dummy; 896 uint64_t counter = 1;
897 read (evfd, &counter, sizeof (uint64_t));
898 }
899 else
900#endif
901 {
902 char dummy;
839 read (evpipe [0], &dummy, 1); 903 read (evpipe [0], &dummy, 1);
840 } 904 }
841 905
842 if (gotsig) 906 if (gotsig && ev_is_default_loop (EV_A))
843 { 907 {
844 int signum; 908 int signum;
845 gotsig = 0; 909 gotsig = 0;
846 910
847 for (signum = signalmax; signum--; ) 911 for (signum = signalmax; signum--; )
848 if (signals [signum].gotsig) 912 if (signals [signum].gotsig)
849 ev_feed_signal_event (EV_A_ signum + 1); 913 ev_feed_signal_event (EV_A_ signum + 1);
850 } 914 }
851 915
916#if EV_ASYNC_ENABLE
852 if (gotasync) 917 if (gotasync)
853 { 918 {
854 int i; 919 int i;
855 gotasync = 0; 920 gotasync = 0;
856 921
… …
859 { 924 {
860 asyncs [i]->sent = 0; 925 asyncs [i]->sent = 0;
861 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 926 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
862 } 927 }
863 } 928 }
929#endif
864} 930}
865 931
866/*****************************************************************************/ 932/*****************************************************************************/
867 933
868static void 934static void
869sighandler (int signum) 935ev_sighandler (int signum)
870{ 936{
871#if EV_MULTIPLICITY 937#if EV_MULTIPLICITY
872 struct ev_loop *loop = &default_loop_struct; 938 struct ev_loop *loop = &default_loop_struct;
873#endif 939#endif
874 940
875#if _WIN32 941#if _WIN32
876 signal (signum, sighandler); 942 signal (signum, ev_sighandler);
877#endif 943#endif
878 944
879 signals [signum - 1].gotsig = 1; 945 signals [signum - 1].gotsig = 1;
880 evpipe_write (EV_A_ 1, 0); 946 evpipe_write (EV_A_ &gotsig);
881} 947}
882 948
883void noinline 949void noinline
884ev_feed_signal_event (EV_P_ int signum) 950ev_feed_signal_event (EV_P_ int signum)
885{ 951{
… …
911#ifndef WIFCONTINUED 977#ifndef WIFCONTINUED
912# define WIFCONTINUED(status) 0 978# define WIFCONTINUED(status) 0
913#endif 979#endif
914 980
915void inline_speed 981void inline_speed
916child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 982child_reap (EV_P_ int chain, int pid, int status)
917{ 983{
918 ev_child *w; 984 ev_child *w;
919 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 985 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
920 986
921 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 987 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
922 { 988 {
923 if ((w->pid == pid || !w->pid) 989 if ((w->pid == pid || !w->pid)
924 && (!traced || (w->flags & 1))) 990 && (!traced || (w->flags & 1)))
925 { 991 {
926 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 992 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
927 w->rpid = pid; 993 w->rpid = pid;
928 w->rstatus = status; 994 w->rstatus = status;
929 ev_feed_event (EV_A_ (W)w, EV_CHILD); 995 ev_feed_event (EV_A_ (W)w, EV_CHILD);
930 } 996 }
931 } 997 }
… …
945 if (!WCONTINUED 1011 if (!WCONTINUED
946 || errno != EINVAL 1012 || errno != EINVAL
947 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1013 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
948 return; 1014 return;
949 1015
950 /* make sure we are called again until all childs have been reaped */ 1016 /* make sure we are called again until all children have been reaped */
951 /* we need to do it this way so that the callback gets called before we continue */ 1017 /* we need to do it this way so that the callback gets called before we continue */
952 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1018 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
953 1019
954 child_reap (EV_A_ sw, pid, pid, status); 1020 child_reap (EV_A_ pid, pid, status);
955 if (EV_PID_HASHSIZE > 1) 1021 if (EV_PID_HASHSIZE > 1)
956 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1022 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
957} 1023}
958 1024
959#endif 1025#endif
960 1026
961/*****************************************************************************/ 1027/*****************************************************************************/
… …
1079 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1145 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1080 have_monotonic = 1; 1146 have_monotonic = 1;
1081 } 1147 }
1082#endif 1148#endif
1083 1149
1084 ev_rt_now = ev_time (); 1150 ev_rt_now = ev_time ();
1085 mn_now = get_clock (); 1151 mn_now = get_clock ();
1086 now_floor = mn_now; 1152 now_floor = mn_now;
1087 rtmn_diff = ev_rt_now - mn_now; 1153 rtmn_diff = ev_rt_now - mn_now;
1088 1154
1089 io_blocktime = 0.; 1155 io_blocktime = 0.;
1090 timeout_blocktime = 0.; 1156 timeout_blocktime = 0.;
1157 backend = 0;
1158 backend_fd = -1;
1159 gotasync = 0;
1160#if EV_USE_INOTIFY
1161 fs_fd = -2;
1162#endif
1091 1163
1092 /* pid check not overridable via env */ 1164 /* pid check not overridable via env */
1093#ifndef _WIN32 1165#ifndef _WIN32
1094 if (flags & EVFLAG_FORKCHECK) 1166 if (flags & EVFLAG_FORKCHECK)
1095 curpid = getpid (); 1167 curpid = getpid ();
… …
1101 flags = atoi (getenv ("LIBEV_FLAGS")); 1173 flags = atoi (getenv ("LIBEV_FLAGS"));
1102 1174
1103 if (!(flags & 0x0000ffffUL)) 1175 if (!(flags & 0x0000ffffUL))
1104 flags |= ev_recommended_backends (); 1176 flags |= ev_recommended_backends ();
1105 1177
1106 backend = 0;
1107 backend_fd = -1;
1108#if EV_USE_INOTIFY
1109 fs_fd = -2;
1110#endif
1111
1112#if EV_USE_PORT 1178#if EV_USE_PORT
1113 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1179 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1114#endif 1180#endif
1115#if EV_USE_KQUEUE 1181#if EV_USE_KQUEUE
1116 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1182 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1138 if (ev_is_active (&pipeev)) 1204 if (ev_is_active (&pipeev))
1139 { 1205 {
1140 ev_ref (EV_A); /* signal watcher */ 1206 ev_ref (EV_A); /* signal watcher */
1141 ev_io_stop (EV_A_ &pipeev); 1207 ev_io_stop (EV_A_ &pipeev);
1142 1208
1143 close (evpipe [0]); evpipe [0] = 0; 1209#if EV_USE_EVENTFD
1144 close (evpipe [1]); evpipe [1] = 0; 1210 if (evfd >= 0)
1211 close (evfd);
1212#endif
1213
1214 if (evpipe [0] >= 0)
1215 {
1216 close (evpipe [0]);
1217 close (evpipe [1]);
1218 }
1145 } 1219 }
1146 1220
1147#if EV_USE_INOTIFY 1221#if EV_USE_INOTIFY
1148 if (fs_fd >= 0) 1222 if (fs_fd >= 0)
1149 close (fs_fd); 1223 close (fs_fd);
… …
1187#if EV_FORK_ENABLE 1261#if EV_FORK_ENABLE
1188 array_free (fork, EMPTY); 1262 array_free (fork, EMPTY);
1189#endif 1263#endif
1190 array_free (prepare, EMPTY); 1264 array_free (prepare, EMPTY);
1191 array_free (check, EMPTY); 1265 array_free (check, EMPTY);
1266#if EV_ASYNC_ENABLE
1267 array_free (async, EMPTY);
1268#endif
1192 1269
1193 backend = 0; 1270 backend = 0;
1194} 1271}
1195 1272
1196void inline_size infy_fork (EV_P); 1273void inline_size infy_fork (EV_P);
… …
1212#endif 1289#endif
1213 1290
1214 if (ev_is_active (&pipeev)) 1291 if (ev_is_active (&pipeev))
1215 { 1292 {
1216 /* this "locks" the handlers against writing to the pipe */ 1293 /* this "locks" the handlers against writing to the pipe */
1294 /* while we modify the fd vars */
1295 gotsig = 1;
1296#if EV_ASYNC_ENABLE
1217 gotsig = gotasync = 1; 1297 gotasync = 1;
1298#endif
1218 1299
1219 ev_ref (EV_A); 1300 ev_ref (EV_A);
1220 ev_io_stop (EV_A_ &pipeev); 1301 ev_io_stop (EV_A_ &pipeev);
1302
1303#if EV_USE_EVENTFD
1304 if (evfd >= 0)
1305 close (evfd);
1306#endif
1307
1308 if (evpipe [0] >= 0)
1309 {
1221 close (evpipe [0]); 1310 close (evpipe [0]);
1222 close (evpipe [1]); 1311 close (evpipe [1]);
1312 }
1223 1313
1224 evpipe_init (EV_A); 1314 evpipe_init (EV_A);
1225 /* now iterate over everything */ 1315 /* now iterate over everything, in case we missed something */
1226 evcb (EV_A_ &pipeev, EV_READ); 1316 pipecb (EV_A_ &pipeev, EV_READ);
1227 } 1317 }
1228 1318
1229 postfork = 0; 1319 postfork = 0;
1230} 1320}
1231 1321
… …
1534static int loop_done; 1624static int loop_done;
1535 1625
1536void 1626void
1537ev_loop (EV_P_ int flags) 1627ev_loop (EV_P_ int flags)
1538{ 1628{
1539 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 1629 loop_done = EVUNLOOP_CANCEL;
1540 ? EVUNLOOP_ONE
1541 : EVUNLOOP_CANCEL;
1542 1630
1543 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 1631 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1544 1632
1545 do 1633 do
1546 { 1634 {
… …
1642 /* queue check watchers, to be executed first */ 1730 /* queue check watchers, to be executed first */
1643 if (expect_false (checkcnt)) 1731 if (expect_false (checkcnt))
1644 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1732 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1645 1733
1646 call_pending (EV_A); 1734 call_pending (EV_A);
1647
1648 } 1735 }
1649 while (expect_true (activecnt && !loop_done)); 1736 while (expect_true (
1737 activecnt
1738 && !loop_done
1739 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1740 ));
1650 1741
1651 if (loop_done == EVUNLOOP_ONE) 1742 if (loop_done == EVUNLOOP_ONE)
1652 loop_done = EVUNLOOP_CANCEL; 1743 loop_done = EVUNLOOP_CANCEL;
1653} 1744}
1654 1745
… …
1922 wlist_add (&signals [w->signum - 1].head, (WL)w); 2013 wlist_add (&signals [w->signum - 1].head, (WL)w);
1923 2014
1924 if (!((WL)w)->next) 2015 if (!((WL)w)->next)
1925 { 2016 {
1926#if _WIN32 2017#if _WIN32
1927 signal (w->signum, sighandler); 2018 signal (w->signum, ev_sighandler);
1928#else 2019#else
1929 struct sigaction sa; 2020 struct sigaction sa;
1930 sa.sa_handler = sighandler; 2021 sa.sa_handler = ev_sighandler;
1931 sigfillset (&sa.sa_mask); 2022 sigfillset (&sa.sa_mask);
1932 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2023 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1933 sigaction (w->signum, &sa, 0); 2024 sigaction (w->signum, &sa, 0);
1934#endif 2025#endif
1935 } 2026 }
… …
2458 2549
2459void 2550void
2460ev_async_send (EV_P_ ev_async *w) 2551ev_async_send (EV_P_ ev_async *w)
2461{ 2552{
2462 w->sent = 1; 2553 w->sent = 1;
2463 evpipe_write (EV_A_ 0, 1); 2554 evpipe_write (EV_A_ &gotasync);
2464} 2555}
2465#endif 2556#endif
2466 2557
2467/*****************************************************************************/ 2558/*****************************************************************************/
2468 2559

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