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

Comparing libev/ev.c (file contents):
Revision 1.355 by root, Fri Oct 22 10:09:12 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
528static unsigned int noinline 531static unsigned int noinline
529ev_linux_version (void) 532ev_linux_version (void)
530{ 533{
531#ifdef __linux 534#ifdef __linux
535 unsigned int v = 0;
532 struct utsname buf; 536 struct utsname buf;
533 unsigned int v;
534 int i; 537 int i;
535 char *p = buf.release; 538 char *p = buf.release;
536 539
537 if (uname (&buf)) 540 if (uname (&buf))
538 return 0; 541 return 0;
… …
588 if (syserr_cb) 591 if (syserr_cb)
589 syserr_cb (msg); 592 syserr_cb (msg);
590 else 593 else
591 { 594 {
592#if EV_AVOID_STDIO 595#if EV_AVOID_STDIO
593 const char *err = strerror (errno);
594
595 ev_printerr (msg); 596 ev_printerr (msg);
596 ev_printerr (": "); 597 ev_printerr (": ");
597 ev_printerr (err); 598 ev_printerr (strerror (errno));
598 ev_printerr ("\n"); 599 ev_printerr ("\n");
599#else 600#else
600 perror (msg); 601 perror (msg);
601#endif 602#endif
602 abort (); 603 abort ();
… …
636 ptr = alloc (ptr, size); 637 ptr = alloc (ptr, size);
637 638
638 if (!ptr && size) 639 if (!ptr && size)
639 { 640 {
640#if EV_AVOID_STDIO 641#if EV_AVOID_STDIO
641 ev_printerr ("libev: memory allocation failed, aborting.\n"); 642 ev_printerr ("(libev) memory allocation failed, aborting.\n");
642#else 643#else
643 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 644 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
644#endif 645#endif
645 abort (); 646 abort ();
646 } 647 }
647 648
648 return ptr; 649 return ptr;
… …
665 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 */
666 unsigned char unused; 667 unsigned char unused;
667#if EV_USE_EPOLL 668#if EV_USE_EPOLL
668 unsigned int egen; /* generation counter to counter epoll bugs */ 669 unsigned int egen; /* generation counter to counter epoll bugs */
669#endif 670#endif
670#if EV_SELECT_IS_WINSOCKET 671#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
671 SOCKET handle; 672 SOCKET handle;
673#endif
674#if EV_USE_IOCP
675 OVERLAPPED or, ow;
672#endif 676#endif
673} ANFD; 677} ANFD;
674 678
675/* stores the pending event set for a given watcher */ 679/* stores the pending event set for a given watcher */
676typedef struct 680typedef struct
… …
811 select (0, 0, 0, 0, &tv); 815 select (0, 0, 0, 0, &tv);
812#endif 816#endif
813 } 817 }
814} 818}
815 819
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
816/*****************************************************************************/ 828/*****************************************************************************/
817 829
818#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 */
819 831
820/* find a suitable new size for the given array, */ 832/* find a suitable new size for the given array, */
… …
972 unsigned char o_events = anfd->events; 984 unsigned char o_events = anfd->events;
973 unsigned char o_reify = anfd->reify; 985 unsigned char o_reify = anfd->reify;
974 986
975 anfd->reify = 0; 987 anfd->reify = 0;
976 988
977#if EV_SELECT_IS_WINSOCKET 989#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
978 if (o_reify & EV__IOFDSET) 990 if (o_reify & EV__IOFDSET)
979 { 991 {
980 unsigned long arg; 992 unsigned long arg;
981 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 993 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
982 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
983 } 996 }
984#endif 997#endif
985 998
986 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 999 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
987 { 1000 {
… …
1364#endif 1377#endif
1365} 1378}
1366 1379
1367/*****************************************************************************/ 1380/*****************************************************************************/
1368 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
1369static void 1396static void
1370ev_sighandler (int signum) 1397ev_sighandler (int signum)
1371{ 1398{
1372#if EV_MULTIPLICITY
1373 EV_P = signals [signum - 1].loop;
1374#endif
1375
1376#ifdef _WIN32 1399#ifdef _WIN32
1377 signal (signum, ev_sighandler); 1400 signal (signum, ev_sighandler);
1378#endif 1401#endif
1379 1402
1380 signals [signum - 1].pending = 1; 1403 ev_feed_signal (signum);
1381 evpipe_write (EV_A_ &sig_pending);
1382} 1404}
1383 1405
1384void noinline 1406void noinline
1385ev_feed_signal_event (EV_P_ int signum) 1407ev_feed_signal_event (EV_P_ int signum)
1386{ 1408{
… …
1486 1508
1487#endif 1509#endif
1488 1510
1489/*****************************************************************************/ 1511/*****************************************************************************/
1490 1512
1513#if EV_USE_IOCP
1514# include "ev_iocp.c"
1515#endif
1491#if EV_USE_PORT 1516#if EV_USE_PORT
1492# include "ev_port.c" 1517# include "ev_port.c"
1493#endif 1518#endif
1494#if EV_USE_KQUEUE 1519#if EV_USE_KQUEUE
1495# include "ev_kqueue.c" 1520# include "ev_kqueue.c"
… …
1635static void noinline 1660static void noinline
1636loop_init (EV_P_ unsigned int flags) 1661loop_init (EV_P_ unsigned int flags)
1637{ 1662{
1638 if (!backend) 1663 if (!backend)
1639 { 1664 {
1665 origflags = flags;
1666
1640#if EV_USE_REALTIME 1667#if EV_USE_REALTIME
1641 if (!have_realtime) 1668 if (!have_realtime)
1642 { 1669 {
1643 struct timespec ts; 1670 struct timespec ts;
1644 1671
… …
1689#endif 1716#endif
1690#if EV_USE_SIGNALFD 1717#if EV_USE_SIGNALFD
1691 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 1718 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1692#endif 1719#endif
1693 1720
1694 if (!(flags & 0x0000ffffU)) 1721 if (!(flags & EVBACKEND_MASK))
1695 flags |= ev_recommended_backends (); 1722 flags |= ev_recommended_backends ();
1696 1723
1724#if EV_USE_IOCP
1725 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1726#endif
1697#if EV_USE_PORT 1727#if EV_USE_PORT
1698 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1728 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1699#endif 1729#endif
1700#if EV_USE_KQUEUE 1730#if EV_USE_KQUEUE
1701 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1731 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1718#endif 1748#endif
1719 } 1749 }
1720} 1750}
1721 1751
1722/* free up a loop structure */ 1752/* free up a loop structure */
1723static void noinline 1753void
1724loop_destroy (EV_P) 1754ev_loop_destroy (EV_P)
1725{ 1755{
1726 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
1727 1780
1728 if (ev_is_active (&pipe_w)) 1781 if (ev_is_active (&pipe_w))
1729 { 1782 {
1730 /*ev_ref (EV_A);*/ 1783 /*ev_ref (EV_A);*/
1731 /*ev_io_stop (EV_A_ &pipe_w);*/ 1784 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1753#endif 1806#endif
1754 1807
1755 if (backend_fd >= 0) 1808 if (backend_fd >= 0)
1756 close (backend_fd); 1809 close (backend_fd);
1757 1810
1811#if EV_USE_IOCP
1812 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1813#endif
1758#if EV_USE_PORT 1814#if EV_USE_PORT
1759 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1815 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1760#endif 1816#endif
1761#if EV_USE_KQUEUE 1817#if EV_USE_KQUEUE
1762 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1818 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1789 array_free (periodic, EMPTY); 1845 array_free (periodic, EMPTY);
1790#endif 1846#endif
1791#if EV_FORK_ENABLE 1847#if EV_FORK_ENABLE
1792 array_free (fork, EMPTY); 1848 array_free (fork, EMPTY);
1793#endif 1849#endif
1850#if EV_CLEANUP_ENABLE
1851 array_free (cleanup, EMPTY);
1852#endif
1794 array_free (prepare, EMPTY); 1853 array_free (prepare, EMPTY);
1795 array_free (check, EMPTY); 1854 array_free (check, EMPTY);
1796#if EV_ASYNC_ENABLE 1855#if EV_ASYNC_ENABLE
1797 array_free (async, EMPTY); 1856 array_free (async, EMPTY);
1798#endif 1857#endif
1799 1858
1800 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
1801} 1869}
1802 1870
1803#if EV_USE_INOTIFY 1871#if EV_USE_INOTIFY
1804inline_size void infy_fork (EV_P); 1872inline_size void infy_fork (EV_P);
1805#endif 1873#endif
… …
1864 loop_init (EV_A_ flags); 1932 loop_init (EV_A_ flags);
1865 1933
1866 if (ev_backend (EV_A)) 1934 if (ev_backend (EV_A))
1867 return EV_A; 1935 return EV_A;
1868 1936
1937 ev_free (EV_A);
1869 return 0; 1938 return 0;
1870} 1939}
1871 1940
1872void
1873ev_loop_destroy (EV_P)
1874{
1875 loop_destroy (EV_A);
1876 ev_free (loop);
1877}
1878
1879void
1880ev_loop_fork (EV_P)
1881{
1882 postfork = 1; /* must be in line with ev_default_fork */
1883}
1884#endif /* multiplicity */ 1941#endif /* multiplicity */
1885 1942
1886#if EV_VERIFY 1943#if EV_VERIFY
1887static void noinline 1944static void noinline
1888verify_watcher (EV_P_ W w) 1945verify_watcher (EV_P_ W w)
… …
1963#if EV_FORK_ENABLE 2020#if EV_FORK_ENABLE
1964 assert (forkmax >= forkcnt); 2021 assert (forkmax >= forkcnt);
1965 array_verify (EV_A_ (W *)forks, forkcnt); 2022 array_verify (EV_A_ (W *)forks, forkcnt);
1966#endif 2023#endif
1967 2024
2025#if EV_CLEANUP_ENABLE
2026 assert (cleanupmax >= cleanupcnt);
2027 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2028#endif
2029
1968#if EV_ASYNC_ENABLE 2030#if EV_ASYNC_ENABLE
1969 assert (asyncmax >= asynccnt); 2031 assert (asyncmax >= asynccnt);
1970 array_verify (EV_A_ (W *)asyncs, asynccnt); 2032 array_verify (EV_A_ (W *)asyncs, asynccnt);
1971#endif 2033#endif
1972 2034
… …
1990} 2052}
1991#endif 2053#endif
1992 2054
1993#if EV_MULTIPLICITY 2055#if EV_MULTIPLICITY
1994struct ev_loop * 2056struct ev_loop *
1995ev_default_loop_init (unsigned int flags)
1996#else 2057#else
1997int 2058int
2059#endif
1998ev_default_loop (unsigned int flags) 2060ev_default_loop (unsigned int flags)
1999#endif
2000{ 2061{
2001 if (!ev_default_loop_ptr) 2062 if (!ev_default_loop_ptr)
2002 { 2063 {
2003#if EV_MULTIPLICITY 2064#if EV_MULTIPLICITY
2004 EV_P = ev_default_loop_ptr = &default_loop_struct; 2065 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2023 2084
2024 return ev_default_loop_ptr; 2085 return ev_default_loop_ptr;
2025} 2086}
2026 2087
2027void 2088void
2028ev_default_destroy (void) 2089ev_loop_fork (EV_P)
2029{ 2090{
2030#if EV_MULTIPLICITY
2031 EV_P = ev_default_loop_ptr;
2032#endif
2033
2034 ev_default_loop_ptr = 0;
2035
2036#if EV_CHILD_ENABLE
2037 ev_ref (EV_A); /* child watcher */
2038 ev_signal_stop (EV_A_ &childev);
2039#endif
2040
2041 loop_destroy (EV_A);
2042}
2043
2044void
2045ev_default_fork (void)
2046{
2047#if EV_MULTIPLICITY
2048 EV_P = ev_default_loop_ptr;
2049#endif
2050
2051 postfork = 1; /* must be in line with ev_loop_fork */ 2091 postfork = 1; /* must be in line with ev_default_fork */
2052} 2092}
2053 2093
2054/*****************************************************************************/ 2094/*****************************************************************************/
2055 2095
2056void 2096void
… …
2078 2118
2079 for (pri = NUMPRI; pri--; ) 2119 for (pri = NUMPRI; pri--; )
2080 while (pendingcnt [pri]) 2120 while (pendingcnt [pri])
2081 { 2121 {
2082 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2122 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2083
2084 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2085 /* ^ this is no longer true, as pending_w could be here */
2086 2123
2087 p->w->pending = 0; 2124 p->w->pending = 0;
2088 EV_CB_INVOKE (p->w, p->events); 2125 EV_CB_INVOKE (p->w, p->events);
2089 EV_FREQUENT_CHECK; 2126 EV_FREQUENT_CHECK;
2090 } 2127 }
… …
2858 sa.sa_handler = ev_sighandler; 2895 sa.sa_handler = ev_sighandler;
2859 sigfillset (&sa.sa_mask); 2896 sigfillset (&sa.sa_mask);
2860 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 */
2861 sigaction (w->signum, &sa, 0); 2898 sigaction (w->signum, &sa, 0);
2862 2899
2900 if (origflags & EVFLAG_NOSIGMASK)
2901 {
2863 sigemptyset (&sa.sa_mask); 2902 sigemptyset (&sa.sa_mask);
2864 sigaddset (&sa.sa_mask, w->signum); 2903 sigaddset (&sa.sa_mask, w->signum);
2865 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 2904 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2905 }
2866#endif 2906#endif
2867 } 2907 }
2868 2908
2869 EV_FREQUENT_CHECK; 2909 EV_FREQUENT_CHECK;
2870} 2910}
… …
3562 3602
3563 EV_FREQUENT_CHECK; 3603 EV_FREQUENT_CHECK;
3564} 3604}
3565#endif 3605#endif
3566 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
3567#if EV_ASYNC_ENABLE 3648#if EV_ASYNC_ENABLE
3568void 3649void
3569ev_async_start (EV_P_ ev_async *w) 3650ev_async_start (EV_P_ ev_async *w)
3570{ 3651{
3571 if (expect_false (ev_is_active (w))) 3652 if (expect_false (ev_is_active (w)))

Diff Legend

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