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

Comparing libev/ev.c (file contents):
Revision 1.125 by root, Sat Nov 17 02:28:43 2007 UTC vs.
Revision 1.134 by root, Fri Nov 23 19:13:33 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
43# ifndef EV_USE_REALTIME 47# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 48# define EV_USE_REALTIME 1
45# endif 49# endif
50# else
51# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0
53# endif
54# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0
56# endif
46# endif 57# endif
47 58
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 59# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H
49# define EV_USE_SELECT 1 61# define EV_USE_SELECT 1
62# else
63# define EV_USE_SELECT 0
64# endif
50# endif 65# endif
51 66
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 67# ifndef EV_USE_POLL
68# if HAVE_POLL && HAVE_POLL_H
53# define EV_USE_POLL 1 69# define EV_USE_POLL 1
70# else
71# define EV_USE_POLL 0
72# endif
54# endif 73# endif
55 74
56# 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
57# define EV_USE_EPOLL 1 77# define EV_USE_EPOLL 1
78# else
79# define EV_USE_EPOLL 0
80# endif
58# endif 81# endif
59 82
83# ifndef EV_USE_KQUEUE
60# 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
61# define EV_USE_KQUEUE 1 85# define EV_USE_KQUEUE 1
86# else
87# define EV_USE_KQUEUE 0
88# endif
62# endif 89# endif
63 90
64# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT) 91# ifndef EV_USE_PORT
92# if HAVE_PORT_H && HAVE_PORT_CREATE
65# define EV_USE_PORT 1 93# define EV_USE_PORT 1
94# else
95# define EV_USE_PORT 0
96# endif
66# endif 97# endif
67 98
68#endif 99#endif
69 100
70#include <math.h> 101#include <math.h>
… …
126#ifndef EV_USE_PORT 157#ifndef EV_USE_PORT
127# define EV_USE_PORT 0 158# define EV_USE_PORT 0
128#endif 159#endif
129 160
130/**/ 161/**/
131
132/* darwin simply cannot be helped */
133#ifdef __APPLE__
134# undef EV_USE_POLL
135# undef EV_USE_KQUEUE
136#endif
137 162
138#ifndef CLOCK_MONOTONIC 163#ifndef CLOCK_MONOTONIC
139# undef EV_USE_MONOTONIC 164# undef EV_USE_MONOTONIC
140# define EV_USE_MONOTONIC 0 165# define EV_USE_MONOTONIC 0
141#endif 166#endif
… …
372 { 397 {
373 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 398 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
374 return; 399 return;
375 } 400 }
376 401
402 if (expect_false (!w_->cb))
403 return;
404
377 w_->pending = ++pendingcnt [ABSPRI (w_)]; 405 w_->pending = ++pendingcnt [ABSPRI (w_)];
378 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);
379 pendings [ABSPRI (w_)][w_->pending - 1].w = w_; 407 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
380 pendings [ABSPRI (w_)][w_->pending - 1].events = revents; 408 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
381} 409}
… …
437 } 465 }
438#endif 466#endif
439 467
440 anfd->reify = 0; 468 anfd->reify = 0;
441 469
442 method_modify (EV_A_ fd, anfd->events, events); 470 backend_modify (EV_A_ fd, anfd->events, events);
443 anfd->events = events; 471 anfd->events = events;
444 } 472 }
445 473
446 fdchangecnt = 0; 474 fdchangecnt = 0;
447} 475}
… …
505 fd_kill (EV_A_ fd); 533 fd_kill (EV_A_ fd);
506 return; 534 return;
507 } 535 }
508} 536}
509 537
510/* 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 */
511static void 539static void
512fd_rearm_all (EV_P) 540fd_rearm_all (EV_P)
513{ 541{
514 int fd; 542 int fd;
515 543
… …
706 int pid, status; 734 int pid, status;
707 735
708 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 736 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
709 { 737 {
710 /* 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 */
711 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 740 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
712 741
713 child_reap (EV_A_ sw, pid, pid, status); 742 child_reap (EV_A_ sw, pid, pid, status);
714 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 */
715 } 744 }
716} 745}
717 746
718#endif 747#endif
719 748
… …
758 || getgid () != getegid (); 787 || getgid () != getegid ();
759#endif 788#endif
760} 789}
761 790
762unsigned int 791unsigned int
763ev_method (EV_P) 792ev_supported_backends (void)
764{ 793{
765 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;
766} 835}
767 836
768static void 837static void
769loop_init (EV_P_ unsigned int flags) 838loop_init (EV_P_ unsigned int flags)
770{ 839{
771 if (!method) 840 if (!backend)
772 { 841 {
773#if EV_USE_MONOTONIC 842#if EV_USE_MONOTONIC
774 { 843 {
775 struct timespec ts; 844 struct timespec ts;
776 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 845 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
… …
781 ev_rt_now = ev_time (); 850 ev_rt_now = ev_time ();
782 mn_now = get_clock (); 851 mn_now = get_clock ();
783 now_floor = mn_now; 852 now_floor = mn_now;
784 rtmn_diff = ev_rt_now - mn_now; 853 rtmn_diff = ev_rt_now - mn_now;
785 854
786 if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) 855 if (!(flags & EVFLAG_NOENV)
856 && !enable_secure ()
857 && getenv ("LIBEV_FLAGS"))
787 flags = atoi (getenv ("LIBEV_FLAGS")); 858 flags = atoi (getenv ("LIBEV_FLAGS"));
788 859
789 if (!(flags & 0x0000ffff)) 860 if (!(flags & 0x0000ffffUL))
790 flags |= 0x0000ffff; 861 flags |= ev_recommended_backends ();
791 862
792 method = 0; 863 backend = 0;
793#if EV_USE_PORT 864#if EV_USE_PORT
794 if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags); 865 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
795#endif 866#endif
796#if EV_USE_KQUEUE 867#if EV_USE_KQUEUE
797 if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); 868 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
798#endif 869#endif
799#if EV_USE_EPOLL 870#if EV_USE_EPOLL
800 if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); 871 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
801#endif 872#endif
802#if EV_USE_POLL 873#if EV_USE_POLL
803 if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); 874 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
804#endif 875#endif
805#if EV_USE_SELECT 876#if EV_USE_SELECT
806 if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); 877 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
807#endif 878#endif
808 879
809 ev_init (&sigev, sigcb); 880 ev_init (&sigev, sigcb);
810 ev_set_priority (&sigev, EV_MAXPRI); 881 ev_set_priority (&sigev, EV_MAXPRI);
811 } 882 }
… …
815loop_destroy (EV_P) 886loop_destroy (EV_P)
816{ 887{
817 int i; 888 int i;
818 889
819#if EV_USE_PORT 890#if EV_USE_PORT
820 if (method == EVMETHOD_PORT ) port_destroy (EV_A); 891 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
821#endif 892#endif
822#if EV_USE_KQUEUE 893#if EV_USE_KQUEUE
823 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 894 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
824#endif 895#endif
825#if EV_USE_EPOLL 896#if EV_USE_EPOLL
826 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 897 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
827#endif 898#endif
828#if EV_USE_POLL 899#if EV_USE_POLL
829 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 900 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
830#endif 901#endif
831#if EV_USE_SELECT 902#if EV_USE_SELECT
832 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 903 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
833#endif 904#endif
834 905
835 for (i = NUMPRI; i--; ) 906 for (i = NUMPRI; i--; )
836 array_free (pending, [i]); 907 array_free (pending, [i]);
837 908
… …
843#endif 914#endif
844 array_free (idle, EMPTY0); 915 array_free (idle, EMPTY0);
845 array_free (prepare, EMPTY0); 916 array_free (prepare, EMPTY0);
846 array_free (check, EMPTY0); 917 array_free (check, EMPTY0);
847 918
848 method = 0; 919 backend = 0;
849} 920}
850 921
851static void 922static void
852loop_fork (EV_P) 923loop_fork (EV_P)
853{ 924{
854#if EV_USE_PORT 925#if EV_USE_PORT
855 if (method == EVMETHOD_PORT ) port_fork (EV_A); 926 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
856#endif 927#endif
857#if EV_USE_KQUEUE 928#if EV_USE_KQUEUE
858 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 929 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
859#endif 930#endif
860#if EV_USE_EPOLL 931#if EV_USE_EPOLL
861 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 932 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
862#endif 933#endif
863 934
864 if (ev_is_active (&sigev)) 935 if (ev_is_active (&sigev))
865 { 936 {
866 /* default loop */ 937 /* default loop */
… …
887 958
888 memset (loop, 0, sizeof (struct ev_loop)); 959 memset (loop, 0, sizeof (struct ev_loop));
889 960
890 loop_init (EV_A_ flags); 961 loop_init (EV_A_ flags);
891 962
892 if (ev_method (EV_A)) 963 if (ev_backend (EV_A))
893 return loop; 964 return loop;
894 965
895 return 0; 966 return 0;
896} 967}
897 968
… …
930 ev_default_loop_ptr = 1; 1001 ev_default_loop_ptr = 1;
931#endif 1002#endif
932 1003
933 loop_init (EV_A_ flags); 1004 loop_init (EV_A_ flags);
934 1005
935 if (ev_method (EV_A)) 1006 if (ev_backend (EV_A))
936 { 1007 {
937 siginit (EV_A); 1008 siginit (EV_A);
938 1009
939#ifndef _WIN32 1010#ifndef _WIN32
940 ev_signal_init (&childev, childcb, SIGCHLD); 1011 ev_signal_init (&childev, childcb, SIGCHLD);
… …
976{ 1047{
977#if EV_MULTIPLICITY 1048#if EV_MULTIPLICITY
978 struct ev_loop *loop = ev_default_loop_ptr; 1049 struct ev_loop *loop = ev_default_loop_ptr;
979#endif 1050#endif
980 1051
981 if (method) 1052 if (backend)
982 postfork = 1; 1053 postfork = 1;
983} 1054}
984 1055
985/*****************************************************************************/ 1056/*****************************************************************************/
986 1057
… …
1218 { 1289 {
1219 block = MAX_BLOCKTIME; 1290 block = MAX_BLOCKTIME;
1220 1291
1221 if (timercnt) 1292 if (timercnt)
1222 { 1293 {
1223 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1294 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1224 if (block > to) block = to; 1295 if (block > to) block = to;
1225 } 1296 }
1226 1297
1227#if EV_PERIODICS 1298#if EV_PERIODICS
1228 if (periodiccnt) 1299 if (periodiccnt)
1229 { 1300 {
1230 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 1301 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1231 if (block > to) block = to; 1302 if (block > to) block = to;
1232 } 1303 }
1233#endif 1304#endif
1234 1305
1235 if (expect_false (block < 0.)) block = 0.; 1306 if (expect_false (block < 0.)) block = 0.;
1236 } 1307 }
1237 1308
1238 method_poll (EV_A_ block); 1309 backend_poll (EV_A_ block);
1239 1310
1240 /* update ev_rt_now, do magic */ 1311 /* update ev_rt_now, do magic */
1241 time_update (EV_A); 1312 time_update (EV_A);
1242 1313
1243 /* queue pending timers and reschedule them */ 1314 /* queue pending timers and reschedule them */
… …
1599 1670
1600 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 1671 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1601 ev_stop (EV_A_ (W)w); 1672 ev_stop (EV_A_ (W)w);
1602} 1673}
1603 1674
1675#if EV_MULTIPLICITY
1676static void
1677embed_cb (EV_P_ struct ev_io *io, int revents)
1678{
1679 struct ev_embed *w = (struct ev_embed *)(((char *)io) - offsetof (struct ev_embed, io));
1680
1681 ev_feed_event (EV_A_ (W)w, EV_EMBED);
1682 ev_loop (w->loop, EVLOOP_NONBLOCK);
1683}
1684
1685void
1686ev_embed_start (EV_P_ struct ev_embed *w)
1687{
1688 if (expect_false (ev_is_active (w)))
1689 return;
1690
1691 {
1692 struct ev_loop *loop = w->loop;
1693 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
1694 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
1695 }
1696
1697 ev_io_start (EV_A_ &w->io);
1698 ev_start (EV_A_ (W)w, 1);
1699}
1700
1701void
1702ev_embed_stop (EV_P_ struct ev_embed *w)
1703{
1704 ev_clear_pending (EV_A_ (W)w);
1705 if (expect_false (!ev_is_active (w)))
1706 return;
1707
1708 ev_io_stop (EV_A_ &w->io);
1709 ev_stop (EV_A_ (W)w);
1710}
1711#endif
1712
1604/*****************************************************************************/ 1713/*****************************************************************************/
1605 1714
1606struct ev_once 1715struct ev_once
1607{ 1716{
1608 struct ev_io io; 1717 struct ev_io io;

Diff Legend

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