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Comparing libev/ev.c (file contents):
Revision 1.126 by root, Sun Nov 18 01:25:23 2007 UTC vs.
Revision 1.135 by root, Sat Nov 24 06:23:27 2007 UTC

… …
32#ifdef __cplusplus 32#ifdef __cplusplus
33extern "C" { 33extern "C" {
34#endif 34#endif
35 35
36#ifndef EV_STANDALONE 36#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H
38# include EV_CONFIG_H
39# else
37# include "config.h" 40# include "config.h"
41# endif
38 42
39# if HAVE_CLOCK_GETTIME 43# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 44# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 45# define EV_USE_MONOTONIC 1
42# endif 46# endif
… …
50# ifndef EV_USE_REALTIME 54# ifndef EV_USE_REALTIME
51# define EV_USE_REALTIME 0 55# define EV_USE_REALTIME 0
52# endif 56# endif
53# endif 57# endif
54 58
55# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 59# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H
56# define EV_USE_SELECT 1 61# define EV_USE_SELECT 1
57# else 62# else
58# define EV_USE_SELECT 0 63# define EV_USE_SELECT 0
64# endif
59# endif 65# endif
60 66
61# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 67# ifndef EV_USE_POLL
68# if HAVE_POLL && HAVE_POLL_H
62# define EV_USE_POLL 1 69# define EV_USE_POLL 1
63# else 70# else
64# define EV_USE_POLL 0 71# define EV_USE_POLL 0
72# endif
65# endif 73# endif
66 74
67# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 75# ifndef EV_USE_EPOLL
76# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
68# define EV_USE_EPOLL 1 77# define EV_USE_EPOLL 1
69# else 78# else
70# define EV_USE_EPOLL 0 79# define EV_USE_EPOLL 0
80# endif
71# endif 81# endif
72 82
83# ifndef EV_USE_KQUEUE
73# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 84# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
74# define EV_USE_KQUEUE 1 85# define EV_USE_KQUEUE 1
75# else 86# else
76# define EV_USE_KQUEUE 0 87# define EV_USE_KQUEUE 0
88# endif
77# endif 89# endif
78 90
79# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT) 91# ifndef EV_USE_PORT
92# if HAVE_PORT_H && HAVE_PORT_CREATE
80# define EV_USE_PORT 1 93# define EV_USE_PORT 1
81# else 94# else
82# define EV_USE_PORT 0 95# define EV_USE_PORT 0
96# endif
83# endif 97# endif
84 98
85#endif 99#endif
86 100
87#include <math.h> 101#include <math.h>
… …
143#ifndef EV_USE_PORT 157#ifndef EV_USE_PORT
144# define EV_USE_PORT 0 158# define EV_USE_PORT 0
145#endif 159#endif
146 160
147/**/ 161/**/
148
149/* darwin simply cannot be helped */
150#ifdef __APPLE__
151# undef EV_USE_POLL
152# undef EV_USE_KQUEUE
153#endif
154 162
155#ifndef CLOCK_MONOTONIC 163#ifndef CLOCK_MONOTONIC
156# undef EV_USE_MONOTONIC 164# undef EV_USE_MONOTONIC
157# define EV_USE_MONOTONIC 0 165# define EV_USE_MONOTONIC 0
158#endif 166#endif
… …
389 { 397 {
390 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 398 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
391 return; 399 return;
392 } 400 }
393 401
402 if (expect_false (!w_->cb))
403 return;
404
394 w_->pending = ++pendingcnt [ABSPRI (w_)]; 405 w_->pending = ++pendingcnt [ABSPRI (w_)];
395 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2); 406 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
396 pendings [ABSPRI (w_)][w_->pending - 1].w = w_; 407 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
397 pendings [ABSPRI (w_)][w_->pending - 1].events = revents; 408 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
398} 409}
… …
454 } 465 }
455#endif 466#endif
456 467
457 anfd->reify = 0; 468 anfd->reify = 0;
458 469
459 method_modify (EV_A_ fd, anfd->events, events); 470 backend_modify (EV_A_ fd, anfd->events, events);
460 anfd->events = events; 471 anfd->events = events;
461 } 472 }
462 473
463 fdchangecnt = 0; 474 fdchangecnt = 0;
464} 475}
… …
522 fd_kill (EV_A_ fd); 533 fd_kill (EV_A_ fd);
523 return; 534 return;
524 } 535 }
525} 536}
526 537
527/* usually called after fork if method needs to re-arm all fds from scratch */ 538/* usually called after fork if backend needs to re-arm all fds from scratch */
528static void 539static void
529fd_rearm_all (EV_P) 540fd_rearm_all (EV_P)
530{ 541{
531 int fd; 542 int fd;
532 543
… …
723 int pid, status; 734 int pid, status;
724 735
725 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 736 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
726 { 737 {
727 /* make sure we are called again until all childs have been reaped */ 738 /* make sure we are called again until all childs have been reaped */
739 /* we need to do it this way so that the callback gets called before we continue */
728 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 740 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
729 741
730 child_reap (EV_A_ sw, pid, pid, status); 742 child_reap (EV_A_ sw, pid, pid, status);
731 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 743 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
732 } 744 }
733} 745}
734 746
735#endif 747#endif
736 748
… …
775 || getgid () != getegid (); 787 || getgid () != getegid ();
776#endif 788#endif
777} 789}
778 790
779unsigned int 791unsigned int
780ev_method (EV_P) 792ev_supported_backends (void)
781{ 793{
782 return method; 794 unsigned int flags = 0;
795
796 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
797 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
798 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
799 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
800 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
801
802 return flags;
803}
804
805unsigned int
806ev_recommended_backends (void)
807{
808 unsigned int flags = ev_supported_backends ();
809
810#ifndef __NetBSD__
811 /* kqueue is borked on everything but netbsd apparently */
812 /* it usually doesn't work correctly on anything but sockets and pipes */
813 flags &= ~EVBACKEND_KQUEUE;
814#endif
815#ifdef __APPLE__
816 // flags &= ~EVBACKEND_KQUEUE; for documentation
817 flags &= ~EVBACKEND_POLL;
818#endif
819
820 return flags;
821}
822
823unsigned int
824ev_embeddable_backends (void)
825{
826 return EVBACKEND_EPOLL
827 | EVBACKEND_KQUEUE
828 | EVBACKEND_PORT;
829}
830
831unsigned int
832ev_backend (EV_P)
833{
834 return backend;
783} 835}
784 836
785static void 837static void
786loop_init (EV_P_ unsigned int flags) 838loop_init (EV_P_ unsigned int flags)
787{ 839{
788 if (!method) 840 if (!backend)
789 { 841 {
790#if EV_USE_MONOTONIC 842#if EV_USE_MONOTONIC
791 { 843 {
792 struct timespec ts; 844 struct timespec ts;
793 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 845 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
… …
798 ev_rt_now = ev_time (); 850 ev_rt_now = ev_time ();
799 mn_now = get_clock (); 851 mn_now = get_clock ();
800 now_floor = mn_now; 852 now_floor = mn_now;
801 rtmn_diff = ev_rt_now - mn_now; 853 rtmn_diff = ev_rt_now - mn_now;
802 854
803 if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) 855 if (!(flags & EVFLAG_NOENV)
856 && !enable_secure ()
857 && getenv ("LIBEV_FLAGS"))
804 flags = atoi (getenv ("LIBEV_FLAGS")); 858 flags = atoi (getenv ("LIBEV_FLAGS"));
805 859
806 if (!(flags & 0x0000ffff)) 860 if (!(flags & 0x0000ffffUL))
807 flags |= 0x0000ffff; 861 flags |= ev_recommended_backends ();
808 862
809 method = 0; 863 backend = 0;
810#if EV_USE_PORT 864#if EV_USE_PORT
811 if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags); 865 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
812#endif 866#endif
813#if EV_USE_KQUEUE 867#if EV_USE_KQUEUE
814 if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); 868 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
815#endif 869#endif
816#if EV_USE_EPOLL 870#if EV_USE_EPOLL
817 if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); 871 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
818#endif 872#endif
819#if EV_USE_POLL 873#if EV_USE_POLL
820 if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); 874 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
821#endif 875#endif
822#if EV_USE_SELECT 876#if EV_USE_SELECT
823 if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); 877 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
824#endif 878#endif
825 879
826 ev_init (&sigev, sigcb); 880 ev_init (&sigev, sigcb);
827 ev_set_priority (&sigev, EV_MAXPRI); 881 ev_set_priority (&sigev, EV_MAXPRI);
828 } 882 }
… …
832loop_destroy (EV_P) 886loop_destroy (EV_P)
833{ 887{
834 int i; 888 int i;
835 889
836#if EV_USE_PORT 890#if EV_USE_PORT
837 if (method == EVMETHOD_PORT ) port_destroy (EV_A); 891 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
838#endif 892#endif
839#if EV_USE_KQUEUE 893#if EV_USE_KQUEUE
840 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 894 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
841#endif 895#endif
842#if EV_USE_EPOLL 896#if EV_USE_EPOLL
843 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 897 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
844#endif 898#endif
845#if EV_USE_POLL 899#if EV_USE_POLL
846 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 900 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
847#endif 901#endif
848#if EV_USE_SELECT 902#if EV_USE_SELECT
849 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 903 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
850#endif 904#endif
851 905
852 for (i = NUMPRI; i--; ) 906 for (i = NUMPRI; i--; )
853 array_free (pending, [i]); 907 array_free (pending, [i]);
854 908
… …
860#endif 914#endif
861 array_free (idle, EMPTY0); 915 array_free (idle, EMPTY0);
862 array_free (prepare, EMPTY0); 916 array_free (prepare, EMPTY0);
863 array_free (check, EMPTY0); 917 array_free (check, EMPTY0);
864 918
865 method = 0; 919 backend = 0;
866} 920}
867 921
868static void 922static void
869loop_fork (EV_P) 923loop_fork (EV_P)
870{ 924{
871#if EV_USE_PORT 925#if EV_USE_PORT
872 if (method == EVMETHOD_PORT ) port_fork (EV_A); 926 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
873#endif 927#endif
874#if EV_USE_KQUEUE 928#if EV_USE_KQUEUE
875 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 929 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
876#endif 930#endif
877#if EV_USE_EPOLL 931#if EV_USE_EPOLL
878 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 932 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
879#endif 933#endif
880 934
881 if (ev_is_active (&sigev)) 935 if (ev_is_active (&sigev))
882 { 936 {
883 /* default loop */ 937 /* default loop */
… …
904 958
905 memset (loop, 0, sizeof (struct ev_loop)); 959 memset (loop, 0, sizeof (struct ev_loop));
906 960
907 loop_init (EV_A_ flags); 961 loop_init (EV_A_ flags);
908 962
909 if (ev_method (EV_A)) 963 if (ev_backend (EV_A))
910 return loop; 964 return loop;
911 965
912 return 0; 966 return 0;
913} 967}
914 968
… …
947 ev_default_loop_ptr = 1; 1001 ev_default_loop_ptr = 1;
948#endif 1002#endif
949 1003
950 loop_init (EV_A_ flags); 1004 loop_init (EV_A_ flags);
951 1005
952 if (ev_method (EV_A)) 1006 if (ev_backend (EV_A))
953 { 1007 {
954 siginit (EV_A); 1008 siginit (EV_A);
955 1009
956#ifndef _WIN32 1010#ifndef _WIN32
957 ev_signal_init (&childev, childcb, SIGCHLD); 1011 ev_signal_init (&childev, childcb, SIGCHLD);
… …
993{ 1047{
994#if EV_MULTIPLICITY 1048#if EV_MULTIPLICITY
995 struct ev_loop *loop = ev_default_loop_ptr; 1049 struct ev_loop *loop = ev_default_loop_ptr;
996#endif 1050#endif
997 1051
998 if (method) 1052 if (backend)
999 postfork = 1; 1053 postfork = 1;
1000} 1054}
1001 1055
1002/*****************************************************************************/ 1056/*****************************************************************************/
1003 1057
… …
1194static int loop_done; 1248static int loop_done;
1195 1249
1196void 1250void
1197ev_loop (EV_P_ int flags) 1251ev_loop (EV_P_ int flags)
1198{ 1252{
1199 double block;
1200 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1253 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
1254 ? EVUNLOOP_ONE
1255 : EVUNLOOP_CANCEL;
1201 1256
1202 while (activecnt) 1257 while (activecnt)
1203 { 1258 {
1204 /* queue check watchers (and execute them) */ 1259 /* queue check watchers (and execute them) */
1205 if (expect_false (preparecnt)) 1260 if (expect_false (preparecnt))
… …
1214 1269
1215 /* update fd-related kernel structures */ 1270 /* update fd-related kernel structures */
1216 fd_reify (EV_A); 1271 fd_reify (EV_A);
1217 1272
1218 /* calculate blocking time */ 1273 /* calculate blocking time */
1274 {
1275 double block;
1219 1276
1220 /* we only need this for !monotonic clock or timers, but as we basically 1277 if (flags & EVLOOP_NONBLOCK || idlecnt)
1221 always have timers, we just calculate it always */ 1278 block = 0.; /* do not block at all */
1279 else
1280 {
1281 /* update time to cancel out callback processing overhead */
1222#if EV_USE_MONOTONIC 1282#if EV_USE_MONOTONIC
1223 if (expect_true (have_monotonic)) 1283 if (expect_true (have_monotonic))
1224 time_update_monotonic (EV_A); 1284 time_update_monotonic (EV_A);
1225 else 1285 else
1226#endif 1286#endif
1227 { 1287 {
1228 ev_rt_now = ev_time (); 1288 ev_rt_now = ev_time ();
1229 mn_now = ev_rt_now; 1289 mn_now = ev_rt_now;
1230 } 1290 }
1231 1291
1232 if (flags & EVLOOP_NONBLOCK || idlecnt)
1233 block = 0.;
1234 else
1235 {
1236 block = MAX_BLOCKTIME; 1292 block = MAX_BLOCKTIME;
1237 1293
1238 if (timercnt) 1294 if (timercnt)
1239 { 1295 {
1240 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1296 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1241 if (block > to) block = to; 1297 if (block > to) block = to;
1242 } 1298 }
1243 1299
1244#if EV_PERIODICS 1300#if EV_PERIODICS
1245 if (periodiccnt) 1301 if (periodiccnt)
1246 { 1302 {
1247 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 1303 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1248 if (block > to) block = to; 1304 if (block > to) block = to;
1249 } 1305 }
1250#endif 1306#endif
1251 1307
1252 if (expect_false (block < 0.)) block = 0.; 1308 if (expect_false (block < 0.)) block = 0.;
1253 } 1309 }
1254 1310
1255 method_poll (EV_A_ block); 1311 backend_poll (EV_A_ block);
1312 }
1256 1313
1257 /* update ev_rt_now, do magic */ 1314 /* update ev_rt_now, do magic */
1258 time_update (EV_A); 1315 time_update (EV_A);
1259 1316
1260 /* queue pending timers and reschedule them */ 1317 /* queue pending timers and reschedule them */
… …
1275 1332
1276 if (expect_false (loop_done)) 1333 if (expect_false (loop_done))
1277 break; 1334 break;
1278 } 1335 }
1279 1336
1280 if (loop_done != 2) 1337 if (loop_done == EVUNLOOP_ONE)
1281 loop_done = 0; 1338 loop_done = EVUNLOOP_CANCEL;
1282} 1339}
1283 1340
1284void 1341void
1285ev_unloop (EV_P_ int how) 1342ev_unloop (EV_P_ int how)
1286{ 1343{
… …
1616 1673
1617 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 1674 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1618 ev_stop (EV_A_ (W)w); 1675 ev_stop (EV_A_ (W)w);
1619} 1676}
1620 1677
1678#if EV_MULTIPLICITY
1679static void
1680embed_cb (EV_P_ struct ev_io *io, int revents)
1681{
1682 struct ev_embed *w = (struct ev_embed *)(((char *)io) - offsetof (struct ev_embed, io));
1683
1684 ev_feed_event (EV_A_ (W)w, EV_EMBED);
1685 ev_loop (w->loop, EVLOOP_NONBLOCK);
1686}
1687
1688void
1689ev_embed_start (EV_P_ struct ev_embed *w)
1690{
1691 if (expect_false (ev_is_active (w)))
1692 return;
1693
1694 {
1695 struct ev_loop *loop = w->loop;
1696 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
1697 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
1698 }
1699
1700 ev_io_start (EV_A_ &w->io);
1701 ev_start (EV_A_ (W)w, 1);
1702}
1703
1704void
1705ev_embed_stop (EV_P_ struct ev_embed *w)
1706{
1707 ev_clear_pending (EV_A_ (W)w);
1708 if (expect_false (!ev_is_active (w)))
1709 return;
1710
1711 ev_io_stop (EV_A_ &w->io);
1712 ev_stop (EV_A_ (W)w);
1713}
1714#endif
1715
1621/*****************************************************************************/ 1716/*****************************************************************************/
1622 1717
1623struct ev_once 1718struct ev_once
1624{ 1719{
1625 struct ev_io io; 1720 struct ev_io io;

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