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Comparing libev/ev.c (file contents):
Revision 1.355 by root, Fri Oct 22 10:09:12 2010 UTC vs.
Revision 1.369 by root, Sun Jan 23 18:53:06 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 {
… …
1338 char dummy; 1351 char dummy;
1339 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 1352 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1340 read (evpipe [0], &dummy, 1); 1353 read (evpipe [0], &dummy, 1);
1341 } 1354 }
1342 1355
1356#if EV_SIGNAL_ENABLE
1343 if (sig_pending) 1357 if (sig_pending)
1344 { 1358 {
1345 sig_pending = 0; 1359 sig_pending = 0;
1346 1360
1347 for (i = EV_NSIG - 1; i--; ) 1361 for (i = EV_NSIG - 1; i--; )
1348 if (expect_false (signals [i].pending)) 1362 if (expect_false (signals [i].pending))
1349 ev_feed_signal_event (EV_A_ i + 1); 1363 ev_feed_signal_event (EV_A_ i + 1);
1350 } 1364 }
1365#endif
1351 1366
1352#if EV_ASYNC_ENABLE 1367#if EV_ASYNC_ENABLE
1353 if (async_pending) 1368 if (async_pending)
1354 { 1369 {
1355 async_pending = 0; 1370 async_pending = 0;
… …
1364#endif 1379#endif
1365} 1380}
1366 1381
1367/*****************************************************************************/ 1382/*****************************************************************************/
1368 1383
1384void
1385ev_feed_signal (int signum)
1386{
1387#if EV_MULTIPLICITY
1388 EV_P = signals [signum - 1].loop;
1389
1390 if (!EV_A)
1391 return;
1392#endif
1393
1394 signals [signum - 1].pending = 1;
1395 evpipe_write (EV_A_ &sig_pending);
1396}
1397
1369static void 1398static void
1370ev_sighandler (int signum) 1399ev_sighandler (int signum)
1371{ 1400{
1372#if EV_MULTIPLICITY
1373 EV_P = signals [signum - 1].loop;
1374#endif
1375
1376#ifdef _WIN32 1401#ifdef _WIN32
1377 signal (signum, ev_sighandler); 1402 signal (signum, ev_sighandler);
1378#endif 1403#endif
1379 1404
1380 signals [signum - 1].pending = 1; 1405 ev_feed_signal (signum);
1381 evpipe_write (EV_A_ &sig_pending);
1382} 1406}
1383 1407
1384void noinline 1408void noinline
1385ev_feed_signal_event (EV_P_ int signum) 1409ev_feed_signal_event (EV_P_ int signum)
1386{ 1410{
… …
1486 1510
1487#endif 1511#endif
1488 1512
1489/*****************************************************************************/ 1513/*****************************************************************************/
1490 1514
1515#if EV_USE_IOCP
1516# include "ev_iocp.c"
1517#endif
1491#if EV_USE_PORT 1518#if EV_USE_PORT
1492# include "ev_port.c" 1519# include "ev_port.c"
1493#endif 1520#endif
1494#if EV_USE_KQUEUE 1521#if EV_USE_KQUEUE
1495# include "ev_kqueue.c" 1522# include "ev_kqueue.c"
… …
1635static void noinline 1662static void noinline
1636loop_init (EV_P_ unsigned int flags) 1663loop_init (EV_P_ unsigned int flags)
1637{ 1664{
1638 if (!backend) 1665 if (!backend)
1639 { 1666 {
1667 origflags = flags;
1668
1640#if EV_USE_REALTIME 1669#if EV_USE_REALTIME
1641 if (!have_realtime) 1670 if (!have_realtime)
1642 { 1671 {
1643 struct timespec ts; 1672 struct timespec ts;
1644 1673
… …
1689#endif 1718#endif
1690#if EV_USE_SIGNALFD 1719#if EV_USE_SIGNALFD
1691 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 1720 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1692#endif 1721#endif
1693 1722
1694 if (!(flags & 0x0000ffffU)) 1723 if (!(flags & EVBACKEND_MASK))
1695 flags |= ev_recommended_backends (); 1724 flags |= ev_recommended_backends ();
1696 1725
1726#if EV_USE_IOCP
1727 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1728#endif
1697#if EV_USE_PORT 1729#if EV_USE_PORT
1698 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1730 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1699#endif 1731#endif
1700#if EV_USE_KQUEUE 1732#if EV_USE_KQUEUE
1701 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1733 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1718#endif 1750#endif
1719 } 1751 }
1720} 1752}
1721 1753
1722/* free up a loop structure */ 1754/* free up a loop structure */
1723static void noinline 1755void
1724loop_destroy (EV_P) 1756ev_loop_destroy (EV_P)
1725{ 1757{
1726 int i; 1758 int i;
1759
1760#if EV_MULTIPLICITY
1761 /* mimic free (0) */
1762 if (!EV_A)
1763 return;
1764#endif
1765
1766#if EV_CLEANUP_ENABLE
1767 /* queue cleanup watchers (and execute them) */
1768 if (expect_false (cleanupcnt))
1769 {
1770 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1771 EV_INVOKE_PENDING;
1772 }
1773#endif
1774
1775#if EV_CHILD_ENABLE
1776 if (ev_is_active (&childev))
1777 {
1778 ev_ref (EV_A); /* child watcher */
1779 ev_signal_stop (EV_A_ &childev);
1780 }
1781#endif
1727 1782
1728 if (ev_is_active (&pipe_w)) 1783 if (ev_is_active (&pipe_w))
1729 { 1784 {
1730 /*ev_ref (EV_A);*/ 1785 /*ev_ref (EV_A);*/
1731 /*ev_io_stop (EV_A_ &pipe_w);*/ 1786 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1753#endif 1808#endif
1754 1809
1755 if (backend_fd >= 0) 1810 if (backend_fd >= 0)
1756 close (backend_fd); 1811 close (backend_fd);
1757 1812
1813#if EV_USE_IOCP
1814 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1815#endif
1758#if EV_USE_PORT 1816#if EV_USE_PORT
1759 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1817 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1760#endif 1818#endif
1761#if EV_USE_KQUEUE 1819#if EV_USE_KQUEUE
1762 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1820 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1789 array_free (periodic, EMPTY); 1847 array_free (periodic, EMPTY);
1790#endif 1848#endif
1791#if EV_FORK_ENABLE 1849#if EV_FORK_ENABLE
1792 array_free (fork, EMPTY); 1850 array_free (fork, EMPTY);
1793#endif 1851#endif
1852#if EV_CLEANUP_ENABLE
1853 array_free (cleanup, EMPTY);
1854#endif
1794 array_free (prepare, EMPTY); 1855 array_free (prepare, EMPTY);
1795 array_free (check, EMPTY); 1856 array_free (check, EMPTY);
1796#if EV_ASYNC_ENABLE 1857#if EV_ASYNC_ENABLE
1797 array_free (async, EMPTY); 1858 array_free (async, EMPTY);
1798#endif 1859#endif
1799 1860
1800 backend = 0; 1861 backend = 0;
1862
1863#if EV_MULTIPLICITY
1864 if (ev_is_default_loop (EV_A))
1865#endif
1866 ev_default_loop_ptr = 0;
1867#if EV_MULTIPLICITY
1868 else
1869 ev_free (EV_A);
1870#endif
1801} 1871}
1802 1872
1803#if EV_USE_INOTIFY 1873#if EV_USE_INOTIFY
1804inline_size void infy_fork (EV_P); 1874inline_size void infy_fork (EV_P);
1805#endif 1875#endif
… …
1864 loop_init (EV_A_ flags); 1934 loop_init (EV_A_ flags);
1865 1935
1866 if (ev_backend (EV_A)) 1936 if (ev_backend (EV_A))
1867 return EV_A; 1937 return EV_A;
1868 1938
1939 ev_free (EV_A);
1869 return 0; 1940 return 0;
1870} 1941}
1871 1942
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 */ 1943#endif /* multiplicity */
1885 1944
1886#if EV_VERIFY 1945#if EV_VERIFY
1887static void noinline 1946static void noinline
1888verify_watcher (EV_P_ W w) 1947verify_watcher (EV_P_ W w)
… …
1963#if EV_FORK_ENABLE 2022#if EV_FORK_ENABLE
1964 assert (forkmax >= forkcnt); 2023 assert (forkmax >= forkcnt);
1965 array_verify (EV_A_ (W *)forks, forkcnt); 2024 array_verify (EV_A_ (W *)forks, forkcnt);
1966#endif 2025#endif
1967 2026
2027#if EV_CLEANUP_ENABLE
2028 assert (cleanupmax >= cleanupcnt);
2029 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2030#endif
2031
1968#if EV_ASYNC_ENABLE 2032#if EV_ASYNC_ENABLE
1969 assert (asyncmax >= asynccnt); 2033 assert (asyncmax >= asynccnt);
1970 array_verify (EV_A_ (W *)asyncs, asynccnt); 2034 array_verify (EV_A_ (W *)asyncs, asynccnt);
1971#endif 2035#endif
1972 2036
… …
1990} 2054}
1991#endif 2055#endif
1992 2056
1993#if EV_MULTIPLICITY 2057#if EV_MULTIPLICITY
1994struct ev_loop * 2058struct ev_loop *
1995ev_default_loop_init (unsigned int flags)
1996#else 2059#else
1997int 2060int
2061#endif
1998ev_default_loop (unsigned int flags) 2062ev_default_loop (unsigned int flags)
1999#endif
2000{ 2063{
2001 if (!ev_default_loop_ptr) 2064 if (!ev_default_loop_ptr)
2002 { 2065 {
2003#if EV_MULTIPLICITY 2066#if EV_MULTIPLICITY
2004 EV_P = ev_default_loop_ptr = &default_loop_struct; 2067 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2023 2086
2024 return ev_default_loop_ptr; 2087 return ev_default_loop_ptr;
2025} 2088}
2026 2089
2027void 2090void
2028ev_default_destroy (void) 2091ev_loop_fork (EV_P)
2029{ 2092{
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 */ 2093 postfork = 1; /* must be in line with ev_default_fork */
2052} 2094}
2053 2095
2054/*****************************************************************************/ 2096/*****************************************************************************/
2055 2097
2056void 2098void
… …
2078 2120
2079 for (pri = NUMPRI; pri--; ) 2121 for (pri = NUMPRI; pri--; )
2080 while (pendingcnt [pri]) 2122 while (pendingcnt [pri])
2081 { 2123 {
2082 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2124 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 2125
2087 p->w->pending = 0; 2126 p->w->pending = 0;
2088 EV_CB_INVOKE (p->w, p->events); 2127 EV_CB_INVOKE (p->w, p->events);
2089 EV_FREQUENT_CHECK; 2128 EV_FREQUENT_CHECK;
2090 } 2129 }
… …
2858 sa.sa_handler = ev_sighandler; 2897 sa.sa_handler = ev_sighandler;
2859 sigfillset (&sa.sa_mask); 2898 sigfillset (&sa.sa_mask);
2860 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2899 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2861 sigaction (w->signum, &sa, 0); 2900 sigaction (w->signum, &sa, 0);
2862 2901
2902 if (origflags & EVFLAG_NOSIGMASK)
2903 {
2863 sigemptyset (&sa.sa_mask); 2904 sigemptyset (&sa.sa_mask);
2864 sigaddset (&sa.sa_mask, w->signum); 2905 sigaddset (&sa.sa_mask, w->signum);
2865 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 2906 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2907 }
2866#endif 2908#endif
2867 } 2909 }
2868 2910
2869 EV_FREQUENT_CHECK; 2911 EV_FREQUENT_CHECK;
2870} 2912}
… …
3562 3604
3563 EV_FREQUENT_CHECK; 3605 EV_FREQUENT_CHECK;
3564} 3606}
3565#endif 3607#endif
3566 3608
3609#if EV_CLEANUP_ENABLE
3610void
3611ev_cleanup_start (EV_P_ ev_cleanup *w)
3612{
3613 if (expect_false (ev_is_active (w)))
3614 return;
3615
3616 EV_FREQUENT_CHECK;
3617
3618 ev_start (EV_A_ (W)w, ++cleanupcnt);
3619 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3620 cleanups [cleanupcnt - 1] = w;
3621
3622 /* cleanup watchers should never keep a refcount on the loop */
3623 ev_unref (EV_A);
3624 EV_FREQUENT_CHECK;
3625}
3626
3627void
3628ev_cleanup_stop (EV_P_ ev_cleanup *w)
3629{
3630 clear_pending (EV_A_ (W)w);
3631 if (expect_false (!ev_is_active (w)))
3632 return;
3633
3634 EV_FREQUENT_CHECK;
3635 ev_ref (EV_A);
3636
3637 {
3638 int active = ev_active (w);
3639
3640 cleanups [active - 1] = cleanups [--cleanupcnt];
3641 ev_active (cleanups [active - 1]) = active;
3642 }
3643
3644 ev_stop (EV_A_ (W)w);
3645
3646 EV_FREQUENT_CHECK;
3647}
3648#endif
3649
3567#if EV_ASYNC_ENABLE 3650#if EV_ASYNC_ENABLE
3568void 3651void
3569ev_async_start (EV_P_ ev_async *w) 3652ev_async_start (EV_P_ ev_async *w)
3570{ 3653{
3571 if (expect_false (ev_is_active (w))) 3654 if (expect_false (ev_is_active (w)))

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