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Comparing libev/ev.c (file contents):
Revision 1.357 by root, Sat Oct 23 22:25:44 2010 UTC vs.
Revision 1.370 by root, Sun Jan 30 19:05:41 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 *
… …
376# undef EV_USE_INOTIFY 376# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 377# define EV_USE_INOTIFY 0
378#endif 378#endif
379 379
380#if !EV_USE_NANOSLEEP 380#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 381/* hp-ux has it in sys/time.h, which we unconditionally include above */
382# if !defined(_WIN32) && !defined(__hpux)
382# include <sys/select.h> 383# include <sys/select.h>
383# endif 384# endif
384#endif 385#endif
385 386
386#if EV_USE_INOTIFY 387#if EV_USE_INOTIFY
… …
530 531
531static unsigned int noinline 532static unsigned int noinline
532ev_linux_version (void) 533ev_linux_version (void)
533{ 534{
534#ifdef __linux 535#ifdef __linux
536 unsigned int v = 0;
535 struct utsname buf; 537 struct utsname buf;
536 unsigned int v;
537 int i; 538 int i;
538 char *p = buf.release; 539 char *p = buf.release;
539 540
540 if (uname (&buf)) 541 if (uname (&buf))
541 return 0; 542 return 0;
… …
591 if (syserr_cb) 592 if (syserr_cb)
592 syserr_cb (msg); 593 syserr_cb (msg);
593 else 594 else
594 { 595 {
595#if EV_AVOID_STDIO 596#if EV_AVOID_STDIO
596 const char *err = strerror (errno);
597
598 ev_printerr (msg); 597 ev_printerr (msg);
599 ev_printerr (": "); 598 ev_printerr (": ");
600 ev_printerr (err); 599 ev_printerr (strerror (errno));
601 ev_printerr ("\n"); 600 ev_printerr ("\n");
602#else 601#else
603 perror (msg); 602 perror (msg);
604#endif 603#endif
605 abort (); 604 abort ();
… …
639 ptr = alloc (ptr, size); 638 ptr = alloc (ptr, size);
640 639
641 if (!ptr && size) 640 if (!ptr && size)
642 { 641 {
643#if EV_AVOID_STDIO 642#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n"); 643 ev_printerr ("(libev) memory allocation failed, aborting.\n");
645#else 644#else
646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 645 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
647#endif 646#endif
648 abort (); 647 abort ();
649 } 648 }
650 649
651 return ptr; 650 return ptr;
… …
815 /* by older ones */ 814 /* by older ones */
816 EV_TV_SET (tv, delay); 815 EV_TV_SET (tv, delay);
817 select (0, 0, 0, 0, &tv); 816 select (0, 0, 0, 0, &tv);
818#endif 817#endif
819 } 818 }
819}
820
821inline_speed int
822ev_timeout_to_ms (ev_tstamp timeout)
823{
824 int ms = timeout * 1000. + .999999;
825
826 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
820} 827}
821 828
822/*****************************************************************************/ 829/*****************************************************************************/
823 830
824#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 831#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
… …
1345 char dummy; 1352 char dummy;
1346 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 1353 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1347 read (evpipe [0], &dummy, 1); 1354 read (evpipe [0], &dummy, 1);
1348 } 1355 }
1349 1356
1357#if EV_SIGNAL_ENABLE
1350 if (sig_pending) 1358 if (sig_pending)
1351 { 1359 {
1352 sig_pending = 0; 1360 sig_pending = 0;
1353 1361
1354 for (i = EV_NSIG - 1; i--; ) 1362 for (i = EV_NSIG - 1; i--; )
1355 if (expect_false (signals [i].pending)) 1363 if (expect_false (signals [i].pending))
1356 ev_feed_signal_event (EV_A_ i + 1); 1364 ev_feed_signal_event (EV_A_ i + 1);
1357 } 1365 }
1366#endif
1358 1367
1359#if EV_ASYNC_ENABLE 1368#if EV_ASYNC_ENABLE
1360 if (async_pending) 1369 if (async_pending)
1361 { 1370 {
1362 async_pending = 0; 1371 async_pending = 0;
… …
1371#endif 1380#endif
1372} 1381}
1373 1382
1374/*****************************************************************************/ 1383/*****************************************************************************/
1375 1384
1385void
1386ev_feed_signal (int signum)
1387{
1388#if EV_MULTIPLICITY
1389 EV_P = signals [signum - 1].loop;
1390
1391 if (!EV_A)
1392 return;
1393#endif
1394
1395 signals [signum - 1].pending = 1;
1396 evpipe_write (EV_A_ &sig_pending);
1397}
1398
1376static void 1399static void
1377ev_sighandler (int signum) 1400ev_sighandler (int signum)
1378{ 1401{
1379#if EV_MULTIPLICITY
1380 EV_P = signals [signum - 1].loop;
1381#endif
1382
1383#ifdef _WIN32 1402#ifdef _WIN32
1384 signal (signum, ev_sighandler); 1403 signal (signum, ev_sighandler);
1385#endif 1404#endif
1386 1405
1387 signals [signum - 1].pending = 1; 1406 ev_feed_signal (signum);
1388 evpipe_write (EV_A_ &sig_pending);
1389} 1407}
1390 1408
1391void noinline 1409void noinline
1392ev_feed_signal_event (EV_P_ int signum) 1410ev_feed_signal_event (EV_P_ int signum)
1393{ 1411{
… …
1645static void noinline 1663static void noinline
1646loop_init (EV_P_ unsigned int flags) 1664loop_init (EV_P_ unsigned int flags)
1647{ 1665{
1648 if (!backend) 1666 if (!backend)
1649 { 1667 {
1668 origflags = flags;
1669
1650#if EV_USE_REALTIME 1670#if EV_USE_REALTIME
1651 if (!have_realtime) 1671 if (!have_realtime)
1652 { 1672 {
1653 struct timespec ts; 1673 struct timespec ts;
1654 1674
… …
1699#endif 1719#endif
1700#if EV_USE_SIGNALFD 1720#if EV_USE_SIGNALFD
1701 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 1721 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702#endif 1722#endif
1703 1723
1704 if (!(flags & 0x0000ffffU)) 1724 if (!(flags & EVBACKEND_MASK))
1705 flags |= ev_recommended_backends (); 1725 flags |= ev_recommended_backends ();
1706 1726
1707#if EV_USE_IOCP 1727#if EV_USE_IOCP
1708 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); 1728 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709#endif 1729#endif
… …
1731#endif 1751#endif
1732 } 1752 }
1733} 1753}
1734 1754
1735/* free up a loop structure */ 1755/* free up a loop structure */
1736static void noinline 1756void
1737loop_destroy (EV_P) 1757ev_loop_destroy (EV_P)
1738{ 1758{
1739 int i; 1759 int i;
1760
1761#if EV_MULTIPLICITY
1762 /* mimic free (0) */
1763 if (!EV_A)
1764 return;
1765#endif
1766
1767#if EV_CLEANUP_ENABLE
1768 /* queue cleanup watchers (and execute them) */
1769 if (expect_false (cleanupcnt))
1770 {
1771 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1772 EV_INVOKE_PENDING;
1773 }
1774#endif
1775
1776#if EV_CHILD_ENABLE
1777 if (ev_is_active (&childev))
1778 {
1779 ev_ref (EV_A); /* child watcher */
1780 ev_signal_stop (EV_A_ &childev);
1781 }
1782#endif
1740 1783
1741 if (ev_is_active (&pipe_w)) 1784 if (ev_is_active (&pipe_w))
1742 { 1785 {
1743 /*ev_ref (EV_A);*/ 1786 /*ev_ref (EV_A);*/
1744 /*ev_io_stop (EV_A_ &pipe_w);*/ 1787 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1805 array_free (periodic, EMPTY); 1848 array_free (periodic, EMPTY);
1806#endif 1849#endif
1807#if EV_FORK_ENABLE 1850#if EV_FORK_ENABLE
1808 array_free (fork, EMPTY); 1851 array_free (fork, EMPTY);
1809#endif 1852#endif
1853#if EV_CLEANUP_ENABLE
1854 array_free (cleanup, EMPTY);
1855#endif
1810 array_free (prepare, EMPTY); 1856 array_free (prepare, EMPTY);
1811 array_free (check, EMPTY); 1857 array_free (check, EMPTY);
1812#if EV_ASYNC_ENABLE 1858#if EV_ASYNC_ENABLE
1813 array_free (async, EMPTY); 1859 array_free (async, EMPTY);
1814#endif 1860#endif
1815 1861
1816 backend = 0; 1862 backend = 0;
1863
1864#if EV_MULTIPLICITY
1865 if (ev_is_default_loop (EV_A))
1866#endif
1867 ev_default_loop_ptr = 0;
1868#if EV_MULTIPLICITY
1869 else
1870 ev_free (EV_A);
1871#endif
1817} 1872}
1818 1873
1819#if EV_USE_INOTIFY 1874#if EV_USE_INOTIFY
1820inline_size void infy_fork (EV_P); 1875inline_size void infy_fork (EV_P);
1821#endif 1876#endif
… …
1880 loop_init (EV_A_ flags); 1935 loop_init (EV_A_ flags);
1881 1936
1882 if (ev_backend (EV_A)) 1937 if (ev_backend (EV_A))
1883 return EV_A; 1938 return EV_A;
1884 1939
1940 ev_free (EV_A);
1885 return 0; 1941 return 0;
1886} 1942}
1887 1943
1888void
1889ev_loop_destroy (EV_P)
1890{
1891 loop_destroy (EV_A);
1892 ev_free (loop);
1893}
1894
1895void
1896ev_loop_fork (EV_P)
1897{
1898 postfork = 1; /* must be in line with ev_default_fork */
1899}
1900#endif /* multiplicity */ 1944#endif /* multiplicity */
1901 1945
1902#if EV_VERIFY 1946#if EV_VERIFY
1903static void noinline 1947static void noinline
1904verify_watcher (EV_P_ W w) 1948verify_watcher (EV_P_ W w)
… …
1979#if EV_FORK_ENABLE 2023#if EV_FORK_ENABLE
1980 assert (forkmax >= forkcnt); 2024 assert (forkmax >= forkcnt);
1981 array_verify (EV_A_ (W *)forks, forkcnt); 2025 array_verify (EV_A_ (W *)forks, forkcnt);
1982#endif 2026#endif
1983 2027
2028#if EV_CLEANUP_ENABLE
2029 assert (cleanupmax >= cleanupcnt);
2030 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2031#endif
2032
1984#if EV_ASYNC_ENABLE 2033#if EV_ASYNC_ENABLE
1985 assert (asyncmax >= asynccnt); 2034 assert (asyncmax >= asynccnt);
1986 array_verify (EV_A_ (W *)asyncs, asynccnt); 2035 array_verify (EV_A_ (W *)asyncs, asynccnt);
1987#endif 2036#endif
1988 2037
… …
2006} 2055}
2007#endif 2056#endif
2008 2057
2009#if EV_MULTIPLICITY 2058#if EV_MULTIPLICITY
2010struct ev_loop * 2059struct ev_loop *
2011ev_default_loop_init (unsigned int flags)
2012#else 2060#else
2013int 2061int
2062#endif
2014ev_default_loop (unsigned int flags) 2063ev_default_loop (unsigned int flags)
2015#endif
2016{ 2064{
2017 if (!ev_default_loop_ptr) 2065 if (!ev_default_loop_ptr)
2018 { 2066 {
2019#if EV_MULTIPLICITY 2067#if EV_MULTIPLICITY
2020 EV_P = ev_default_loop_ptr = &default_loop_struct; 2068 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2039 2087
2040 return ev_default_loop_ptr; 2088 return ev_default_loop_ptr;
2041} 2089}
2042 2090
2043void 2091void
2044ev_default_destroy (void) 2092ev_loop_fork (EV_P)
2045{ 2093{
2046#if EV_MULTIPLICITY
2047 EV_P = ev_default_loop_ptr;
2048#endif
2049
2050 ev_default_loop_ptr = 0;
2051
2052#if EV_CHILD_ENABLE
2053 ev_ref (EV_A); /* child watcher */
2054 ev_signal_stop (EV_A_ &childev);
2055#endif
2056
2057 loop_destroy (EV_A);
2058}
2059
2060void
2061ev_default_fork (void)
2062{
2063#if EV_MULTIPLICITY
2064 EV_P = ev_default_loop_ptr;
2065#endif
2066
2067 postfork = 1; /* must be in line with ev_loop_fork */ 2094 postfork = 1; /* must be in line with ev_default_fork */
2068} 2095}
2069 2096
2070/*****************************************************************************/ 2097/*****************************************************************************/
2071 2098
2072void 2099void
… …
2094 2121
2095 for (pri = NUMPRI; pri--; ) 2122 for (pri = NUMPRI; pri--; )
2096 while (pendingcnt [pri]) 2123 while (pendingcnt [pri])
2097 { 2124 {
2098 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2125 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2099
2100 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2101 /* ^ this is no longer true, as pending_w could be here */
2102 2126
2103 p->w->pending = 0; 2127 p->w->pending = 0;
2104 EV_CB_INVOKE (p->w, p->events); 2128 EV_CB_INVOKE (p->w, p->events);
2105 EV_FREQUENT_CHECK; 2129 EV_FREQUENT_CHECK;
2106 } 2130 }
… …
2168 feed_reverse_done (EV_A_ EV_TIMER); 2192 feed_reverse_done (EV_A_ EV_TIMER);
2169 } 2193 }
2170} 2194}
2171 2195
2172#if EV_PERIODIC_ENABLE 2196#if EV_PERIODIC_ENABLE
2197
2198inline_speed
2199periodic_recalc (EV_P_ ev_periodic *w)
2200{
2201 /* TODO: use slow but potentially more correct incremental algo, */
2202 /* also do not rely on ceil */
2203 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2204}
2205
2173/* make periodics pending */ 2206/* make periodics pending */
2174inline_size void 2207inline_size void
2175periodics_reify (EV_P) 2208periodics_reify (EV_P)
2176{ 2209{
2177 EV_FREQUENT_CHECK; 2210 EV_FREQUENT_CHECK;
… …
2196 ANHE_at_cache (periodics [HEAP0]); 2229 ANHE_at_cache (periodics [HEAP0]);
2197 downheap (periodics, periodiccnt, HEAP0); 2230 downheap (periodics, periodiccnt, HEAP0);
2198 } 2231 }
2199 else if (w->interval) 2232 else if (w->interval)
2200 { 2233 {
2201 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2234 periodic_recalc (EV_A_ w);
2235
2202 /* if next trigger time is not sufficiently in the future, put it there */ 2236 /* if next trigger time is not sufficiently in the future, put it there */
2203 /* this might happen because of floating point inexactness */ 2237 /* this might happen because of floating point inexactness */
2204 if (ev_at (w) - ev_rt_now < TIME_EPSILON) 2238 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2205 { 2239 {
2206 ev_at (w) += w->interval; 2240 ev_at (w) += w->interval;
… …
2240 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2274 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2241 2275
2242 if (w->reschedule_cb) 2276 if (w->reschedule_cb)
2243 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2277 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2244 else if (w->interval) 2278 else if (w->interval)
2245 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2279 periodic_recalc (EV_A_ w);
2246 2280
2247 ANHE_at_cache (periodics [i]); 2281 ANHE_at_cache (periodics [i]);
2248 } 2282 }
2249 2283
2250 reheap (periodics, periodiccnt); 2284 reheap (periodics, periodiccnt);
… …
2742 if (w->reschedule_cb) 2776 if (w->reschedule_cb)
2743 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2777 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2744 else if (w->interval) 2778 else if (w->interval)
2745 { 2779 {
2746 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 2780 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2747 /* this formula differs from the one in periodic_reify because we do not always round up */ 2781 periodic_recalc (EV_A_ w);
2748 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2749 } 2782 }
2750 else 2783 else
2751 ev_at (w) = w->offset; 2784 ev_at (w) = w->offset;
2752 2785
2753 EV_FREQUENT_CHECK; 2786 EV_FREQUENT_CHECK;
… …
2874 sa.sa_handler = ev_sighandler; 2907 sa.sa_handler = ev_sighandler;
2875 sigfillset (&sa.sa_mask); 2908 sigfillset (&sa.sa_mask);
2876 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2909 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2877 sigaction (w->signum, &sa, 0); 2910 sigaction (w->signum, &sa, 0);
2878 2911
2912 if (origflags & EVFLAG_NOSIGMASK)
2913 {
2879 sigemptyset (&sa.sa_mask); 2914 sigemptyset (&sa.sa_mask);
2880 sigaddset (&sa.sa_mask, w->signum); 2915 sigaddset (&sa.sa_mask, w->signum);
2881 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 2916 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2917 }
2882#endif 2918#endif
2883 } 2919 }
2884 2920
2885 EV_FREQUENT_CHECK; 2921 EV_FREQUENT_CHECK;
2886} 2922}
… …
3578 3614
3579 EV_FREQUENT_CHECK; 3615 EV_FREQUENT_CHECK;
3580} 3616}
3581#endif 3617#endif
3582 3618
3619#if EV_CLEANUP_ENABLE
3620void
3621ev_cleanup_start (EV_P_ ev_cleanup *w)
3622{
3623 if (expect_false (ev_is_active (w)))
3624 return;
3625
3626 EV_FREQUENT_CHECK;
3627
3628 ev_start (EV_A_ (W)w, ++cleanupcnt);
3629 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3630 cleanups [cleanupcnt - 1] = w;
3631
3632 /* cleanup watchers should never keep a refcount on the loop */
3633 ev_unref (EV_A);
3634 EV_FREQUENT_CHECK;
3635}
3636
3637void
3638ev_cleanup_stop (EV_P_ ev_cleanup *w)
3639{
3640 clear_pending (EV_A_ (W)w);
3641 if (expect_false (!ev_is_active (w)))
3642 return;
3643
3644 EV_FREQUENT_CHECK;
3645 ev_ref (EV_A);
3646
3647 {
3648 int active = ev_active (w);
3649
3650 cleanups [active - 1] = cleanups [--cleanupcnt];
3651 ev_active (cleanups [active - 1]) = active;
3652 }
3653
3654 ev_stop (EV_A_ (W)w);
3655
3656 EV_FREQUENT_CHECK;
3657}
3658#endif
3659
3583#if EV_ASYNC_ENABLE 3660#if EV_ASYNC_ENABLE
3584void 3661void
3585ev_async_start (EV_P_ ev_async *w) 3662ev_async_start (EV_P_ ev_async *w)
3586{ 3663{
3587 if (expect_false (ev_is_active (w))) 3664 if (expect_false (ev_is_active (w)))

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