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 | * |
… | |
… | |
530 | |
530 | |
531 | static unsigned int noinline |
531 | static unsigned int noinline |
532 | ev_linux_version (void) |
532 | ev_linux_version (void) |
533 | { |
533 | { |
534 | #ifdef __linux |
534 | #ifdef __linux |
|
|
535 | unsigned int v = 0; |
535 | struct utsname buf; |
536 | struct utsname buf; |
536 | unsigned int v; |
|
|
537 | int i; |
537 | int i; |
538 | char *p = buf.release; |
538 | char *p = buf.release; |
539 | |
539 | |
540 | if (uname (&buf)) |
540 | if (uname (&buf)) |
541 | return 0; |
541 | return 0; |
… | |
… | |
591 | if (syserr_cb) |
591 | if (syserr_cb) |
592 | syserr_cb (msg); |
592 | syserr_cb (msg); |
593 | else |
593 | else |
594 | { |
594 | { |
595 | #if EV_AVOID_STDIO |
595 | #if EV_AVOID_STDIO |
596 | const char *err = strerror (errno); |
|
|
597 | |
|
|
598 | ev_printerr (msg); |
596 | ev_printerr (msg); |
599 | ev_printerr (": "); |
597 | ev_printerr (": "); |
600 | ev_printerr (err); |
598 | ev_printerr (strerror (errno)); |
601 | ev_printerr ("\n"); |
599 | ev_printerr ("\n"); |
602 | #else |
600 | #else |
603 | perror (msg); |
601 | perror (msg); |
604 | #endif |
602 | #endif |
605 | abort (); |
603 | abort (); |
… | |
… | |
639 | ptr = alloc (ptr, size); |
637 | ptr = alloc (ptr, size); |
640 | |
638 | |
641 | if (!ptr && size) |
639 | if (!ptr && size) |
642 | { |
640 | { |
643 | #if EV_AVOID_STDIO |
641 | #if EV_AVOID_STDIO |
644 | ev_printerr ("libev: memory allocation failed, aborting.\n"); |
642 | ev_printerr ("(libev) memory allocation failed, aborting.\n"); |
645 | #else |
643 | #else |
646 | fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
644 | fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size); |
647 | #endif |
645 | #endif |
648 | abort (); |
646 | abort (); |
649 | } |
647 | } |
650 | |
648 | |
651 | return ptr; |
649 | return ptr; |
… | |
… | |
1371 | #endif |
1369 | #endif |
1372 | } |
1370 | } |
1373 | |
1371 | |
1374 | /*****************************************************************************/ |
1372 | /*****************************************************************************/ |
1375 | |
1373 | |
|
|
1374 | void |
|
|
1375 | ev_feed_signal (int signum) |
|
|
1376 | { |
|
|
1377 | #if EV_MULTIPLICITY |
|
|
1378 | EV_P = signals [signum - 1].loop; |
|
|
1379 | |
|
|
1380 | if (!EV_A) |
|
|
1381 | return; |
|
|
1382 | #endif |
|
|
1383 | |
|
|
1384 | signals [signum - 1].pending = 1; |
|
|
1385 | evpipe_write (EV_A_ &sig_pending); |
|
|
1386 | } |
|
|
1387 | |
1376 | static void |
1388 | static void |
1377 | ev_sighandler (int signum) |
1389 | ev_sighandler (int signum) |
1378 | { |
1390 | { |
1379 | #if EV_MULTIPLICITY |
|
|
1380 | EV_P = signals [signum - 1].loop; |
|
|
1381 | #endif |
|
|
1382 | |
|
|
1383 | #ifdef _WIN32 |
1391 | #ifdef _WIN32 |
1384 | signal (signum, ev_sighandler); |
1392 | signal (signum, ev_sighandler); |
1385 | #endif |
1393 | #endif |
1386 | |
1394 | |
1387 | signals [signum - 1].pending = 1; |
1395 | ev_feed_signal (signum); |
1388 | evpipe_write (EV_A_ &sig_pending); |
|
|
1389 | } |
1396 | } |
1390 | |
1397 | |
1391 | void noinline |
1398 | void noinline |
1392 | ev_feed_signal_event (EV_P_ int signum) |
1399 | ev_feed_signal_event (EV_P_ int signum) |
1393 | { |
1400 | { |
… | |
… | |
1645 | static void noinline |
1652 | static void noinline |
1646 | loop_init (EV_P_ unsigned int flags) |
1653 | loop_init (EV_P_ unsigned int flags) |
1647 | { |
1654 | { |
1648 | if (!backend) |
1655 | if (!backend) |
1649 | { |
1656 | { |
|
|
1657 | origflags = flags; |
|
|
1658 | |
1650 | #if EV_USE_REALTIME |
1659 | #if EV_USE_REALTIME |
1651 | if (!have_realtime) |
1660 | if (!have_realtime) |
1652 | { |
1661 | { |
1653 | struct timespec ts; |
1662 | struct timespec ts; |
1654 | |
1663 | |
… | |
… | |
1699 | #endif |
1708 | #endif |
1700 | #if EV_USE_SIGNALFD |
1709 | #if EV_USE_SIGNALFD |
1701 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1710 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1702 | #endif |
1711 | #endif |
1703 | |
1712 | |
1704 | if (!(flags & 0x0000ffffU)) |
1713 | if (!(flags & EVBACKEND_MASK)) |
1705 | flags |= ev_recommended_backends (); |
1714 | flags |= ev_recommended_backends (); |
1706 | |
1715 | |
1707 | #if EV_USE_IOCP |
1716 | #if EV_USE_IOCP |
1708 | if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); |
1717 | if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); |
1709 | #endif |
1718 | #endif |
… | |
… | |
1731 | #endif |
1740 | #endif |
1732 | } |
1741 | } |
1733 | } |
1742 | } |
1734 | |
1743 | |
1735 | /* free up a loop structure */ |
1744 | /* free up a loop structure */ |
1736 | static void noinline |
1745 | void |
1737 | loop_destroy (EV_P) |
1746 | ev_loop_destroy (EV_P) |
1738 | { |
1747 | { |
1739 | int i; |
1748 | int i; |
|
|
1749 | |
|
|
1750 | #if EV_MULTIPLICITY |
|
|
1751 | /* mimic free (0) */ |
|
|
1752 | if (!EV_A) |
|
|
1753 | return; |
|
|
1754 | #endif |
|
|
1755 | |
|
|
1756 | #if EV_CLEANUP_ENABLE |
|
|
1757 | /* queue cleanup watchers (and execute them) */ |
|
|
1758 | if (expect_false (cleanupcnt)) |
|
|
1759 | { |
|
|
1760 | queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); |
|
|
1761 | EV_INVOKE_PENDING; |
|
|
1762 | } |
|
|
1763 | #endif |
|
|
1764 | |
|
|
1765 | #if EV_CHILD_ENABLE |
|
|
1766 | if (ev_is_active (&childev)) |
|
|
1767 | { |
|
|
1768 | ev_ref (EV_A); /* child watcher */ |
|
|
1769 | ev_signal_stop (EV_A_ &childev); |
|
|
1770 | } |
|
|
1771 | #endif |
1740 | |
1772 | |
1741 | if (ev_is_active (&pipe_w)) |
1773 | if (ev_is_active (&pipe_w)) |
1742 | { |
1774 | { |
1743 | /*ev_ref (EV_A);*/ |
1775 | /*ev_ref (EV_A);*/ |
1744 | /*ev_io_stop (EV_A_ &pipe_w);*/ |
1776 | /*ev_io_stop (EV_A_ &pipe_w);*/ |
… | |
… | |
1805 | array_free (periodic, EMPTY); |
1837 | array_free (periodic, EMPTY); |
1806 | #endif |
1838 | #endif |
1807 | #if EV_FORK_ENABLE |
1839 | #if EV_FORK_ENABLE |
1808 | array_free (fork, EMPTY); |
1840 | array_free (fork, EMPTY); |
1809 | #endif |
1841 | #endif |
|
|
1842 | #if EV_CLEANUP_ENABLE |
|
|
1843 | array_free (cleanup, EMPTY); |
|
|
1844 | #endif |
1810 | array_free (prepare, EMPTY); |
1845 | array_free (prepare, EMPTY); |
1811 | array_free (check, EMPTY); |
1846 | array_free (check, EMPTY); |
1812 | #if EV_ASYNC_ENABLE |
1847 | #if EV_ASYNC_ENABLE |
1813 | array_free (async, EMPTY); |
1848 | array_free (async, EMPTY); |
1814 | #endif |
1849 | #endif |
1815 | |
1850 | |
1816 | backend = 0; |
1851 | backend = 0; |
|
|
1852 | |
|
|
1853 | #if EV_MULTIPLICITY |
|
|
1854 | if (ev_is_default_loop (EV_A)) |
|
|
1855 | #endif |
|
|
1856 | ev_default_loop_ptr = 0; |
|
|
1857 | #if EV_MULTIPLICITY |
|
|
1858 | else |
|
|
1859 | ev_free (EV_A); |
|
|
1860 | #endif |
1817 | } |
1861 | } |
1818 | |
1862 | |
1819 | #if EV_USE_INOTIFY |
1863 | #if EV_USE_INOTIFY |
1820 | inline_size void infy_fork (EV_P); |
1864 | inline_size void infy_fork (EV_P); |
1821 | #endif |
1865 | #endif |
… | |
… | |
1880 | loop_init (EV_A_ flags); |
1924 | loop_init (EV_A_ flags); |
1881 | |
1925 | |
1882 | if (ev_backend (EV_A)) |
1926 | if (ev_backend (EV_A)) |
1883 | return EV_A; |
1927 | return EV_A; |
1884 | |
1928 | |
|
|
1929 | ev_free (EV_A); |
1885 | return 0; |
1930 | return 0; |
1886 | } |
1931 | } |
1887 | |
1932 | |
1888 | void |
|
|
1889 | ev_loop_destroy (EV_P) |
|
|
1890 | { |
|
|
1891 | loop_destroy (EV_A); |
|
|
1892 | ev_free (loop); |
|
|
1893 | } |
|
|
1894 | |
|
|
1895 | void |
|
|
1896 | ev_loop_fork (EV_P) |
|
|
1897 | { |
|
|
1898 | postfork = 1; /* must be in line with ev_default_fork */ |
|
|
1899 | } |
|
|
1900 | #endif /* multiplicity */ |
1933 | #endif /* multiplicity */ |
1901 | |
1934 | |
1902 | #if EV_VERIFY |
1935 | #if EV_VERIFY |
1903 | static void noinline |
1936 | static void noinline |
1904 | verify_watcher (EV_P_ W w) |
1937 | verify_watcher (EV_P_ W w) |
… | |
… | |
1979 | #if EV_FORK_ENABLE |
2012 | #if EV_FORK_ENABLE |
1980 | assert (forkmax >= forkcnt); |
2013 | assert (forkmax >= forkcnt); |
1981 | array_verify (EV_A_ (W *)forks, forkcnt); |
2014 | array_verify (EV_A_ (W *)forks, forkcnt); |
1982 | #endif |
2015 | #endif |
1983 | |
2016 | |
|
|
2017 | #if EV_CLEANUP_ENABLE |
|
|
2018 | assert (cleanupmax >= cleanupcnt); |
|
|
2019 | array_verify (EV_A_ (W *)cleanups, cleanupcnt); |
|
|
2020 | #endif |
|
|
2021 | |
1984 | #if EV_ASYNC_ENABLE |
2022 | #if EV_ASYNC_ENABLE |
1985 | assert (asyncmax >= asynccnt); |
2023 | assert (asyncmax >= asynccnt); |
1986 | array_verify (EV_A_ (W *)asyncs, asynccnt); |
2024 | array_verify (EV_A_ (W *)asyncs, asynccnt); |
1987 | #endif |
2025 | #endif |
1988 | |
2026 | |
… | |
… | |
2038 | |
2076 | |
2039 | return ev_default_loop_ptr; |
2077 | return ev_default_loop_ptr; |
2040 | } |
2078 | } |
2041 | |
2079 | |
2042 | void |
2080 | void |
2043 | ev_default_destroy (void) |
2081 | ev_loop_fork (EV_P) |
2044 | { |
2082 | { |
2045 | #if EV_MULTIPLICITY |
|
|
2046 | EV_P = ev_default_loop_ptr; |
|
|
2047 | #endif |
|
|
2048 | |
|
|
2049 | ev_default_loop_ptr = 0; |
|
|
2050 | |
|
|
2051 | #if EV_CHILD_ENABLE |
|
|
2052 | ev_ref (EV_A); /* child watcher */ |
|
|
2053 | ev_signal_stop (EV_A_ &childev); |
|
|
2054 | #endif |
|
|
2055 | |
|
|
2056 | loop_destroy (EV_A); |
|
|
2057 | } |
|
|
2058 | |
|
|
2059 | void |
|
|
2060 | ev_default_fork (void) |
|
|
2061 | { |
|
|
2062 | #if EV_MULTIPLICITY |
|
|
2063 | EV_P = ev_default_loop_ptr; |
|
|
2064 | #endif |
|
|
2065 | |
|
|
2066 | postfork = 1; /* must be in line with ev_loop_fork */ |
2083 | postfork = 1; /* must be in line with ev_default_fork */ |
2067 | } |
2084 | } |
2068 | |
2085 | |
2069 | /*****************************************************************************/ |
2086 | /*****************************************************************************/ |
2070 | |
2087 | |
2071 | void |
2088 | void |
… | |
… | |
2093 | |
2110 | |
2094 | for (pri = NUMPRI; pri--; ) |
2111 | for (pri = NUMPRI; pri--; ) |
2095 | while (pendingcnt [pri]) |
2112 | while (pendingcnt [pri]) |
2096 | { |
2113 | { |
2097 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
2114 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
2098 | |
|
|
2099 | /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/ |
|
|
2100 | /* ^ this is no longer true, as pending_w could be here */ |
|
|
2101 | |
2115 | |
2102 | p->w->pending = 0; |
2116 | p->w->pending = 0; |
2103 | EV_CB_INVOKE (p->w, p->events); |
2117 | EV_CB_INVOKE (p->w, p->events); |
2104 | EV_FREQUENT_CHECK; |
2118 | EV_FREQUENT_CHECK; |
2105 | } |
2119 | } |
… | |
… | |
2873 | sa.sa_handler = ev_sighandler; |
2887 | sa.sa_handler = ev_sighandler; |
2874 | sigfillset (&sa.sa_mask); |
2888 | sigfillset (&sa.sa_mask); |
2875 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
2889 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
2876 | sigaction (w->signum, &sa, 0); |
2890 | sigaction (w->signum, &sa, 0); |
2877 | |
2891 | |
|
|
2892 | if (origflags & EVFLAG_NOSIGMASK) |
|
|
2893 | { |
2878 | sigemptyset (&sa.sa_mask); |
2894 | sigemptyset (&sa.sa_mask); |
2879 | sigaddset (&sa.sa_mask, w->signum); |
2895 | sigaddset (&sa.sa_mask, w->signum); |
2880 | sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
2896 | sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
|
|
2897 | } |
2881 | #endif |
2898 | #endif |
2882 | } |
2899 | } |
2883 | |
2900 | |
2884 | EV_FREQUENT_CHECK; |
2901 | EV_FREQUENT_CHECK; |
2885 | } |
2902 | } |
… | |
… | |
3577 | |
3594 | |
3578 | EV_FREQUENT_CHECK; |
3595 | EV_FREQUENT_CHECK; |
3579 | } |
3596 | } |
3580 | #endif |
3597 | #endif |
3581 | |
3598 | |
|
|
3599 | #if EV_CLEANUP_ENABLE |
|
|
3600 | void |
|
|
3601 | ev_cleanup_start (EV_P_ ev_cleanup *w) |
|
|
3602 | { |
|
|
3603 | if (expect_false (ev_is_active (w))) |
|
|
3604 | return; |
|
|
3605 | |
|
|
3606 | EV_FREQUENT_CHECK; |
|
|
3607 | |
|
|
3608 | ev_start (EV_A_ (W)w, ++cleanupcnt); |
|
|
3609 | array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); |
|
|
3610 | cleanups [cleanupcnt - 1] = w; |
|
|
3611 | |
|
|
3612 | /* cleanup watchers should never keep a refcount on the loop */ |
|
|
3613 | ev_unref (EV_A); |
|
|
3614 | EV_FREQUENT_CHECK; |
|
|
3615 | } |
|
|
3616 | |
|
|
3617 | void |
|
|
3618 | ev_cleanup_stop (EV_P_ ev_cleanup *w) |
|
|
3619 | { |
|
|
3620 | clear_pending (EV_A_ (W)w); |
|
|
3621 | if (expect_false (!ev_is_active (w))) |
|
|
3622 | return; |
|
|
3623 | |
|
|
3624 | EV_FREQUENT_CHECK; |
|
|
3625 | ev_ref (EV_A); |
|
|
3626 | |
|
|
3627 | { |
|
|
3628 | int active = ev_active (w); |
|
|
3629 | |
|
|
3630 | cleanups [active - 1] = cleanups [--cleanupcnt]; |
|
|
3631 | ev_active (cleanups [active - 1]) = active; |
|
|
3632 | } |
|
|
3633 | |
|
|
3634 | ev_stop (EV_A_ (W)w); |
|
|
3635 | |
|
|
3636 | EV_FREQUENT_CHECK; |
|
|
3637 | } |
|
|
3638 | #endif |
|
|
3639 | |
3582 | #if EV_ASYNC_ENABLE |
3640 | #if EV_ASYNC_ENABLE |
3583 | void |
3641 | void |
3584 | ev_async_start (EV_P_ ev_async *w) |
3642 | ev_async_start (EV_P_ ev_async *w) |
3585 | { |
3643 | { |
3586 | if (expect_false (ev_is_active (w))) |
3644 | if (expect_false (ev_is_active (w))) |