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Comparing libev/ev.c (file contents):
Revision 1.354 by root, Fri Oct 22 09:24:11 2010 UTC vs.
Revision 1.368 by root, Mon Jan 17 12:11:11 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 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 *
… …
382# include <sys/select.h> 382# include <sys/select.h>
383# endif 383# endif
384#endif 384#endif
385 385
386#if EV_USE_INOTIFY 386#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h> 387# include <sys/statfs.h>
389# include <sys/inotify.h> 388# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 389/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 390# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 391# undef EV_USE_INOTIFY
… …
523# include "ev_win32.c" 522# include "ev_win32.c"
524#endif 523#endif
525 524
526/*****************************************************************************/ 525/*****************************************************************************/
527 526
527#ifdef __linux
528# include <sys/utsname.h>
529#endif
530
531static unsigned int noinline
532ev_linux_version (void)
533{
534#ifdef __linux
535 unsigned int v = 0;
536 struct utsname buf;
537 int i;
538 char *p = buf.release;
539
540 if (uname (&buf))
541 return 0;
542
543 for (i = 3+1; --i; )
544 {
545 unsigned int c = 0;
546
547 for (;;)
548 {
549 if (*p >= '0' && *p <= '9')
550 c = c * 10 + *p++ - '0';
551 else
552 {
553 p += *p == '.';
554 break;
555 }
556 }
557
558 v = (v << 8) | c;
559 }
560
561 return v;
562#else
563 return 0;
564#endif
565}
566
567/*****************************************************************************/
568
528#if EV_AVOID_STDIO 569#if EV_AVOID_STDIO
529static void noinline 570static void noinline
530ev_printerr (const char *msg) 571ev_printerr (const char *msg)
531{ 572{
532 write (STDERR_FILENO, msg, strlen (msg)); 573 write (STDERR_FILENO, msg, strlen (msg));
… …
550 if (syserr_cb) 591 if (syserr_cb)
551 syserr_cb (msg); 592 syserr_cb (msg);
552 else 593 else
553 { 594 {
554#if EV_AVOID_STDIO 595#if EV_AVOID_STDIO
555 const char *err = strerror (errno);
556
557 ev_printerr (msg); 596 ev_printerr (msg);
558 ev_printerr (": "); 597 ev_printerr (": ");
559 ev_printerr (err); 598 ev_printerr (strerror (errno));
560 ev_printerr ("\n"); 599 ev_printerr ("\n");
561#else 600#else
562 perror (msg); 601 perror (msg);
563#endif 602#endif
564 abort (); 603 abort ();
… …
598 ptr = alloc (ptr, size); 637 ptr = alloc (ptr, size);
599 638
600 if (!ptr && size) 639 if (!ptr && size)
601 { 640 {
602#if EV_AVOID_STDIO 641#if EV_AVOID_STDIO
603 ev_printerr ("libev: memory allocation failed, aborting.\n"); 642 ev_printerr ("(libev) memory allocation failed, aborting.\n");
604#else 643#else
605 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 644 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
606#endif 645#endif
607 abort (); 646 abort ();
608 } 647 }
609 648
610 return ptr; 649 return ptr;
… …
627 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 666 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
628 unsigned char unused; 667 unsigned char unused;
629#if EV_USE_EPOLL 668#if EV_USE_EPOLL
630 unsigned int egen; /* generation counter to counter epoll bugs */ 669 unsigned int egen; /* generation counter to counter epoll bugs */
631#endif 670#endif
632#if EV_SELECT_IS_WINSOCKET 671#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
633 SOCKET handle; 672 SOCKET handle;
673#endif
674#if EV_USE_IOCP
675 OVERLAPPED or, ow;
634#endif 676#endif
635} ANFD; 677} ANFD;
636 678
637/* stores the pending event set for a given watcher */ 679/* stores the pending event set for a given watcher */
638typedef struct 680typedef struct
… …
773 select (0, 0, 0, 0, &tv); 815 select (0, 0, 0, 0, &tv);
774#endif 816#endif
775 } 817 }
776} 818}
777 819
820inline_speed int
821ev_timeout_to_ms (ev_tstamp timeout)
822{
823 int ms = timeout * 1000. + .999999;
824
825 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
826}
827
778/*****************************************************************************/ 828/*****************************************************************************/
779 829
780#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 830#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
781 831
782/* find a suitable new size for the given array, */ 832/* find a suitable new size for the given array, */
… …
934 unsigned char o_events = anfd->events; 984 unsigned char o_events = anfd->events;
935 unsigned char o_reify = anfd->reify; 985 unsigned char o_reify = anfd->reify;
936 986
937 anfd->reify = 0; 987 anfd->reify = 0;
938 988
939#if EV_SELECT_IS_WINSOCKET 989#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
940 if (o_reify & EV__IOFDSET) 990 if (o_reify & EV__IOFDSET)
941 { 991 {
942 unsigned long arg; 992 unsigned long arg;
943 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 993 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
944 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 994 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
995 printf ("oi %d %x\n", fd, anfd->handle);//D
945 } 996 }
946#endif 997#endif
947 998
948 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 999 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
949 { 1000 {
… …
1326#endif 1377#endif
1327} 1378}
1328 1379
1329/*****************************************************************************/ 1380/*****************************************************************************/
1330 1381
1382void
1383ev_feed_signal (int signum)
1384{
1385#if EV_MULTIPLICITY
1386 EV_P = signals [signum - 1].loop;
1387
1388 if (!EV_A)
1389 return;
1390#endif
1391
1392 signals [signum - 1].pending = 1;
1393 evpipe_write (EV_A_ &sig_pending);
1394}
1395
1331static void 1396static void
1332ev_sighandler (int signum) 1397ev_sighandler (int signum)
1333{ 1398{
1334#if EV_MULTIPLICITY
1335 EV_P = signals [signum - 1].loop;
1336#endif
1337
1338#ifdef _WIN32 1399#ifdef _WIN32
1339 signal (signum, ev_sighandler); 1400 signal (signum, ev_sighandler);
1340#endif 1401#endif
1341 1402
1342 signals [signum - 1].pending = 1; 1403 ev_feed_signal (signum);
1343 evpipe_write (EV_A_ &sig_pending);
1344} 1404}
1345 1405
1346void noinline 1406void noinline
1347ev_feed_signal_event (EV_P_ int signum) 1407ev_feed_signal_event (EV_P_ int signum)
1348{ 1408{
… …
1448 1508
1449#endif 1509#endif
1450 1510
1451/*****************************************************************************/ 1511/*****************************************************************************/
1452 1512
1513#if EV_USE_IOCP
1514# include "ev_iocp.c"
1515#endif
1453#if EV_USE_PORT 1516#if EV_USE_PORT
1454# include "ev_port.c" 1517# include "ev_port.c"
1455#endif 1518#endif
1456#if EV_USE_KQUEUE 1519#if EV_USE_KQUEUE
1457# include "ev_kqueue.c" 1520# include "ev_kqueue.c"
… …
1530ev_embeddable_backends (void) 1593ev_embeddable_backends (void)
1531{ 1594{
1532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1595 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1533 1596
1534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1597 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1535 /* please fix it and tell me how to detect the fix */ 1598 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1536 flags &= ~EVBACKEND_EPOLL; 1599 flags &= ~EVBACKEND_EPOLL;
1537 1600
1538 return flags; 1601 return flags;
1539} 1602}
1540 1603
1541unsigned int 1604unsigned int
… …
1597static void noinline 1660static void noinline
1598loop_init (EV_P_ unsigned int flags) 1661loop_init (EV_P_ unsigned int flags)
1599{ 1662{
1600 if (!backend) 1663 if (!backend)
1601 { 1664 {
1665 origflags = flags;
1666
1602#if EV_USE_REALTIME 1667#if EV_USE_REALTIME
1603 if (!have_realtime) 1668 if (!have_realtime)
1604 { 1669 {
1605 struct timespec ts; 1670 struct timespec ts;
1606 1671
… …
1651#endif 1716#endif
1652#if EV_USE_SIGNALFD 1717#if EV_USE_SIGNALFD
1653 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 1718 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1654#endif 1719#endif
1655 1720
1656 if (!(flags & 0x0000ffffU)) 1721 if (!(flags & EVBACKEND_MASK))
1657 flags |= ev_recommended_backends (); 1722 flags |= ev_recommended_backends ();
1658 1723
1724#if EV_USE_IOCP
1725 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1726#endif
1659#if EV_USE_PORT 1727#if EV_USE_PORT
1660 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1728 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1661#endif 1729#endif
1662#if EV_USE_KQUEUE 1730#if EV_USE_KQUEUE
1663 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1731 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1680#endif 1748#endif
1681 } 1749 }
1682} 1750}
1683 1751
1684/* free up a loop structure */ 1752/* free up a loop structure */
1685static void noinline 1753void
1686loop_destroy (EV_P) 1754ev_loop_destroy (EV_P)
1687{ 1755{
1688 int i; 1756 int i;
1757
1758#if EV_MULTIPLICITY
1759 /* mimic free (0) */
1760 if (!EV_A)
1761 return;
1762#endif
1763
1764#if EV_CLEANUP_ENABLE
1765 /* queue cleanup watchers (and execute them) */
1766 if (expect_false (cleanupcnt))
1767 {
1768 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1769 EV_INVOKE_PENDING;
1770 }
1771#endif
1772
1773#if EV_CHILD_ENABLE
1774 if (ev_is_active (&childev))
1775 {
1776 ev_ref (EV_A); /* child watcher */
1777 ev_signal_stop (EV_A_ &childev);
1778 }
1779#endif
1689 1780
1690 if (ev_is_active (&pipe_w)) 1781 if (ev_is_active (&pipe_w))
1691 { 1782 {
1692 /*ev_ref (EV_A);*/ 1783 /*ev_ref (EV_A);*/
1693 /*ev_io_stop (EV_A_ &pipe_w);*/ 1784 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1715#endif 1806#endif
1716 1807
1717 if (backend_fd >= 0) 1808 if (backend_fd >= 0)
1718 close (backend_fd); 1809 close (backend_fd);
1719 1810
1811#if EV_USE_IOCP
1812 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1813#endif
1720#if EV_USE_PORT 1814#if EV_USE_PORT
1721 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1815 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1722#endif 1816#endif
1723#if EV_USE_KQUEUE 1817#if EV_USE_KQUEUE
1724 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1818 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1751 array_free (periodic, EMPTY); 1845 array_free (periodic, EMPTY);
1752#endif 1846#endif
1753#if EV_FORK_ENABLE 1847#if EV_FORK_ENABLE
1754 array_free (fork, EMPTY); 1848 array_free (fork, EMPTY);
1755#endif 1849#endif
1850#if EV_CLEANUP_ENABLE
1851 array_free (cleanup, EMPTY);
1852#endif
1756 array_free (prepare, EMPTY); 1853 array_free (prepare, EMPTY);
1757 array_free (check, EMPTY); 1854 array_free (check, EMPTY);
1758#if EV_ASYNC_ENABLE 1855#if EV_ASYNC_ENABLE
1759 array_free (async, EMPTY); 1856 array_free (async, EMPTY);
1760#endif 1857#endif
1761 1858
1762 backend = 0; 1859 backend = 0;
1860
1861#if EV_MULTIPLICITY
1862 if (ev_is_default_loop (EV_A))
1863#endif
1864 ev_default_loop_ptr = 0;
1865#if EV_MULTIPLICITY
1866 else
1867 ev_free (EV_A);
1868#endif
1763} 1869}
1764 1870
1765#if EV_USE_INOTIFY 1871#if EV_USE_INOTIFY
1766inline_size void infy_fork (EV_P); 1872inline_size void infy_fork (EV_P);
1767#endif 1873#endif
… …
1826 loop_init (EV_A_ flags); 1932 loop_init (EV_A_ flags);
1827 1933
1828 if (ev_backend (EV_A)) 1934 if (ev_backend (EV_A))
1829 return EV_A; 1935 return EV_A;
1830 1936
1937 ev_free (EV_A);
1831 return 0; 1938 return 0;
1832} 1939}
1833 1940
1834void
1835ev_loop_destroy (EV_P)
1836{
1837 loop_destroy (EV_A);
1838 ev_free (loop);
1839}
1840
1841void
1842ev_loop_fork (EV_P)
1843{
1844 postfork = 1; /* must be in line with ev_default_fork */
1845}
1846#endif /* multiplicity */ 1941#endif /* multiplicity */
1847 1942
1848#if EV_VERIFY 1943#if EV_VERIFY
1849static void noinline 1944static void noinline
1850verify_watcher (EV_P_ W w) 1945verify_watcher (EV_P_ W w)
… …
1925#if EV_FORK_ENABLE 2020#if EV_FORK_ENABLE
1926 assert (forkmax >= forkcnt); 2021 assert (forkmax >= forkcnt);
1927 array_verify (EV_A_ (W *)forks, forkcnt); 2022 array_verify (EV_A_ (W *)forks, forkcnt);
1928#endif 2023#endif
1929 2024
2025#if EV_CLEANUP_ENABLE
2026 assert (cleanupmax >= cleanupcnt);
2027 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2028#endif
2029
1930#if EV_ASYNC_ENABLE 2030#if EV_ASYNC_ENABLE
1931 assert (asyncmax >= asynccnt); 2031 assert (asyncmax >= asynccnt);
1932 array_verify (EV_A_ (W *)asyncs, asynccnt); 2032 array_verify (EV_A_ (W *)asyncs, asynccnt);
1933#endif 2033#endif
1934 2034
… …
1952} 2052}
1953#endif 2053#endif
1954 2054
1955#if EV_MULTIPLICITY 2055#if EV_MULTIPLICITY
1956struct ev_loop * 2056struct ev_loop *
1957ev_default_loop_init (unsigned int flags)
1958#else 2057#else
1959int 2058int
2059#endif
1960ev_default_loop (unsigned int flags) 2060ev_default_loop (unsigned int flags)
1961#endif
1962{ 2061{
1963 if (!ev_default_loop_ptr) 2062 if (!ev_default_loop_ptr)
1964 { 2063 {
1965#if EV_MULTIPLICITY 2064#if EV_MULTIPLICITY
1966 EV_P = ev_default_loop_ptr = &default_loop_struct; 2065 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1985 2084
1986 return ev_default_loop_ptr; 2085 return ev_default_loop_ptr;
1987} 2086}
1988 2087
1989void 2088void
1990ev_default_destroy (void) 2089ev_loop_fork (EV_P)
1991{ 2090{
1992#if EV_MULTIPLICITY
1993 EV_P = ev_default_loop_ptr;
1994#endif
1995
1996 ev_default_loop_ptr = 0;
1997
1998#if EV_CHILD_ENABLE
1999 ev_ref (EV_A); /* child watcher */
2000 ev_signal_stop (EV_A_ &childev);
2001#endif
2002
2003 loop_destroy (EV_A);
2004}
2005
2006void
2007ev_default_fork (void)
2008{
2009#if EV_MULTIPLICITY
2010 EV_P = ev_default_loop_ptr;
2011#endif
2012
2013 postfork = 1; /* must be in line with ev_loop_fork */ 2091 postfork = 1; /* must be in line with ev_default_fork */
2014} 2092}
2015 2093
2016/*****************************************************************************/ 2094/*****************************************************************************/
2017 2095
2018void 2096void
… …
2040 2118
2041 for (pri = NUMPRI; pri--; ) 2119 for (pri = NUMPRI; pri--; )
2042 while (pendingcnt [pri]) 2120 while (pendingcnt [pri])
2043 { 2121 {
2044 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2122 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2045
2046 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2047 /* ^ this is no longer true, as pending_w could be here */
2048 2123
2049 p->w->pending = 0; 2124 p->w->pending = 0;
2050 EV_CB_INVOKE (p->w, p->events); 2125 EV_CB_INVOKE (p->w, p->events);
2051 EV_FREQUENT_CHECK; 2126 EV_FREQUENT_CHECK;
2052 } 2127 }
… …
2820 sa.sa_handler = ev_sighandler; 2895 sa.sa_handler = ev_sighandler;
2821 sigfillset (&sa.sa_mask); 2896 sigfillset (&sa.sa_mask);
2822 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2897 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2823 sigaction (w->signum, &sa, 0); 2898 sigaction (w->signum, &sa, 0);
2824 2899
2900 if (origflags & EVFLAG_NOSIGMASK)
2901 {
2825 sigemptyset (&sa.sa_mask); 2902 sigemptyset (&sa.sa_mask);
2826 sigaddset (&sa.sa_mask, w->signum); 2903 sigaddset (&sa.sa_mask, w->signum);
2827 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 2904 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2905 }
2828#endif 2906#endif
2829 } 2907 }
2830 2908
2831 EV_FREQUENT_CHECK; 2909 EV_FREQUENT_CHECK;
2832} 2910}
… …
3048 { 3126 {
3049 struct inotify_event *ev = (struct inotify_event *)(buf + ofs); 3127 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3050 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3128 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3051 ofs += sizeof (struct inotify_event) + ev->len; 3129 ofs += sizeof (struct inotify_event) + ev->len;
3052 } 3130 }
3053}
3054
3055inline_size unsigned int
3056ev_linux_version (void)
3057{
3058 struct utsname buf;
3059 unsigned int v;
3060 int i;
3061 char *p = buf.release;
3062
3063 if (uname (&buf))
3064 return 0;
3065
3066 for (i = 3+1; --i; )
3067 {
3068 unsigned int c = 0;
3069
3070 for (;;)
3071 {
3072 if (*p >= '0' && *p <= '9')
3073 c = c * 10 + *p++ - '0';
3074 else
3075 {
3076 p += *p == '.';
3077 break;
3078 }
3079 }
3080
3081 v = (v << 8) | c;
3082 }
3083
3084 return v;
3085} 3131}
3086 3132
3087inline_size void 3133inline_size void
3088ev_check_2625 (EV_P) 3134ev_check_2625 (EV_P)
3089{ 3135{
… …
3556 3602
3557 EV_FREQUENT_CHECK; 3603 EV_FREQUENT_CHECK;
3558} 3604}
3559#endif 3605#endif
3560 3606
3607#if EV_CLEANUP_ENABLE
3608void
3609ev_cleanup_start (EV_P_ ev_cleanup *w)
3610{
3611 if (expect_false (ev_is_active (w)))
3612 return;
3613
3614 EV_FREQUENT_CHECK;
3615
3616 ev_start (EV_A_ (W)w, ++cleanupcnt);
3617 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3618 cleanups [cleanupcnt - 1] = w;
3619
3620 /* cleanup watchers should never keep a refcount on the loop */
3621 ev_unref (EV_A);
3622 EV_FREQUENT_CHECK;
3623}
3624
3625void
3626ev_cleanup_stop (EV_P_ ev_cleanup *w)
3627{
3628 clear_pending (EV_A_ (W)w);
3629 if (expect_false (!ev_is_active (w)))
3630 return;
3631
3632 EV_FREQUENT_CHECK;
3633 ev_ref (EV_A);
3634
3635 {
3636 int active = ev_active (w);
3637
3638 cleanups [active - 1] = cleanups [--cleanupcnt];
3639 ev_active (cleanups [active - 1]) = active;
3640 }
3641
3642 ev_stop (EV_A_ (W)w);
3643
3644 EV_FREQUENT_CHECK;
3645}
3646#endif
3647
3561#if EV_ASYNC_ENABLE 3648#if EV_ASYNC_ENABLE
3562void 3649void
3563ev_async_start (EV_P_ ev_async *w) 3650ev_async_start (EV_P_ ev_async *w)
3564{ 3651{
3565 if (expect_false (ev_is_active (w))) 3652 if (expect_false (ev_is_active (w)))

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