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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 1.377 by root, Wed Jun 8 13:11:55 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 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
42# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
47 53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
156# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
157# endif 163# endif
158 164
159#endif 165#endif
160 166
161#include <math.h>
162#include <stdlib.h> 167#include <stdlib.h>
163#include <string.h> 168#include <string.h>
164#include <fcntl.h> 169#include <fcntl.h>
165#include <stddef.h> 170#include <stddef.h>
166 171
… …
232/* to make it compile regardless, just remove the above line, */ 237/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */ 238/* but consider reporting it, too! :) */
234# define EV_NSIG 65 239# define EV_NSIG 65
235#endif 240#endif
236 241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
237#ifndef EV_USE_CLOCK_SYSCALL 246#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 247# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 249# else
241# define EV_USE_CLOCK_SYSCALL 0 250# define EV_USE_CLOCK_SYSCALL 0
… …
376# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
378#endif 387#endif
379 388
380#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
382# include <sys/select.h> 392# include <sys/select.h>
383# endif 393# endif
384#endif 394#endif
385 395
386#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h> 397# include <sys/statfs.h>
389# include <sys/inotify.h> 398# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 400# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 401# undef EV_USE_INOTIFY
… …
443#else 452#else
444# define EV_FREQUENT_CHECK do { } while (0) 453# define EV_FREQUENT_CHECK do { } while (0)
445#endif 454#endif
446 455
447/* 456/*
448 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 459 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 462
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 465
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
… …
523# include "ev_win32.c" 529# include "ev_win32.c"
524#endif 530#endif
525 531
526/*****************************************************************************/ 532/*****************************************************************************/
527 533
534/* define a suitable floor function (only used by periodics atm) */
535
536#if EV_USE_FLOOR
537# include <math.h>
538# define ev_floor(v) floor (v)
539#else
540
541#include <float.h>
542
543/* a floor() replacement function, should be independent of ev_tstamp type */
544static ev_tstamp noinline
545ev_floor (ev_tstamp v)
546{
547 /* the choice of shift factor is not terribly important */
548#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
549 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
550#else
551 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
552#endif
553
554 /* argument too large for an unsigned long? */
555 if (expect_false (v >= shift))
556 {
557 ev_tstamp f;
558
559 if (v == v - 1.)
560 return v; /* very large number */
561
562 f = shift * ev_floor (v * (1. / shift));
563 return f + ev_floor (v - f);
564 }
565
566 /* special treatment for negative args? */
567 if (expect_false (v < 0.))
568 {
569 ev_tstamp f = -ev_floor (-v);
570
571 return f - (f == v ? 0 : 1);
572 }
573
574 /* fits into an unsigned long */
575 return (unsigned long)v;
576}
577
578#endif
579
580/*****************************************************************************/
581
582#ifdef __linux
583# include <sys/utsname.h>
584#endif
585
528static unsigned int noinline 586static unsigned int noinline
529ev_linux_version (void) 587ev_linux_version (void)
530{ 588{
531#ifdef __linux 589#ifdef __linux
590 unsigned int v = 0;
532 struct utsname buf; 591 struct utsname buf;
533 unsigned int v;
534 int i; 592 int i;
535 char *p = buf.release; 593 char *p = buf.release;
536 594
537 if (uname (&buf)) 595 if (uname (&buf))
538 return 0; 596 return 0;
… …
588 if (syserr_cb) 646 if (syserr_cb)
589 syserr_cb (msg); 647 syserr_cb (msg);
590 else 648 else
591 { 649 {
592#if EV_AVOID_STDIO 650#if EV_AVOID_STDIO
593 const char *err = strerror (errno);
594
595 ev_printerr (msg); 651 ev_printerr (msg);
596 ev_printerr (": "); 652 ev_printerr (": ");
597 ev_printerr (err); 653 ev_printerr (strerror (errno));
598 ev_printerr ("\n"); 654 ev_printerr ("\n");
599#else 655#else
600 perror (msg); 656 perror (msg);
601#endif 657#endif
602 abort (); 658 abort ();
… …
636 ptr = alloc (ptr, size); 692 ptr = alloc (ptr, size);
637 693
638 if (!ptr && size) 694 if (!ptr && size)
639 { 695 {
640#if EV_AVOID_STDIO 696#if EV_AVOID_STDIO
641 ev_printerr ("libev: memory allocation failed, aborting.\n"); 697 ev_printerr ("(libev) memory allocation failed, aborting.\n");
642#else 698#else
643 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 699 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
644#endif 700#endif
645 abort (); 701 abort ();
646 } 702 }
647 703
648 return ptr; 704 return ptr;
… …
665 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 721 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
666 unsigned char unused; 722 unsigned char unused;
667#if EV_USE_EPOLL 723#if EV_USE_EPOLL
668 unsigned int egen; /* generation counter to counter epoll bugs */ 724 unsigned int egen; /* generation counter to counter epoll bugs */
669#endif 725#endif
670#if EV_SELECT_IS_WINSOCKET 726#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
671 SOCKET handle; 727 SOCKET handle;
728#endif
729#if EV_USE_IOCP
730 OVERLAPPED or, ow;
672#endif 731#endif
673} ANFD; 732} ANFD;
674 733
675/* stores the pending event set for a given watcher */ 734/* stores the pending event set for a given watcher */
676typedef struct 735typedef struct
… …
961inline_size void 1020inline_size void
962fd_reify (EV_P) 1021fd_reify (EV_P)
963{ 1022{
964 int i; 1023 int i;
965 1024
1025#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1026 for (i = 0; i < fdchangecnt; ++i)
1027 {
1028 int fd = fdchanges [i];
1029 ANFD *anfd = anfds + fd;
1030
1031 if (anfd->reify & EV__IOFDSET && anfd->head)
1032 {
1033 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1034
1035 if (handle != anfd->handle)
1036 {
1037 unsigned long arg;
1038
1039 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1040
1041 /* handle changed, but fd didn't - we need to do it in two steps */
1042 backend_modify (EV_A_ fd, anfd->events, 0);
1043 anfd->events = 0;
1044 anfd->handle = handle;
1045 }
1046 }
1047 }
1048#endif
1049
966 for (i = 0; i < fdchangecnt; ++i) 1050 for (i = 0; i < fdchangecnt; ++i)
967 { 1051 {
968 int fd = fdchanges [i]; 1052 int fd = fdchanges [i];
969 ANFD *anfd = anfds + fd; 1053 ANFD *anfd = anfds + fd;
970 ev_io *w; 1054 ev_io *w;
971 1055
972 unsigned char o_events = anfd->events; 1056 unsigned char o_events = anfd->events;
973 unsigned char o_reify = anfd->reify; 1057 unsigned char o_reify = anfd->reify;
974 1058
975 anfd->reify = 0; 1059 anfd->reify = 0;
976
977#if EV_SELECT_IS_WINSOCKET
978 if (o_reify & EV__IOFDSET)
979 {
980 unsigned long arg;
981 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
982 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
983 }
984#endif
985 1060
986 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1061 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
987 { 1062 {
988 anfd->events = 0; 1063 anfd->events = 0;
989 1064
… …
1338 char dummy; 1413 char dummy;
1339 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 1414 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1340 read (evpipe [0], &dummy, 1); 1415 read (evpipe [0], &dummy, 1);
1341 } 1416 }
1342 1417
1418#if EV_SIGNAL_ENABLE
1343 if (sig_pending) 1419 if (sig_pending)
1344 { 1420 {
1345 sig_pending = 0; 1421 sig_pending = 0;
1346 1422
1347 for (i = EV_NSIG - 1; i--; ) 1423 for (i = EV_NSIG - 1; i--; )
1348 if (expect_false (signals [i].pending)) 1424 if (expect_false (signals [i].pending))
1349 ev_feed_signal_event (EV_A_ i + 1); 1425 ev_feed_signal_event (EV_A_ i + 1);
1350 } 1426 }
1427#endif
1351 1428
1352#if EV_ASYNC_ENABLE 1429#if EV_ASYNC_ENABLE
1353 if (async_pending) 1430 if (async_pending)
1354 { 1431 {
1355 async_pending = 0; 1432 async_pending = 0;
… …
1364#endif 1441#endif
1365} 1442}
1366 1443
1367/*****************************************************************************/ 1444/*****************************************************************************/
1368 1445
1446void
1447ev_feed_signal (int signum)
1448{
1449#if EV_MULTIPLICITY
1450 EV_P = signals [signum - 1].loop;
1451
1452 if (!EV_A)
1453 return;
1454#endif
1455
1456 signals [signum - 1].pending = 1;
1457 evpipe_write (EV_A_ &sig_pending);
1458}
1459
1369static void 1460static void
1370ev_sighandler (int signum) 1461ev_sighandler (int signum)
1371{ 1462{
1372#if EV_MULTIPLICITY
1373 EV_P = signals [signum - 1].loop;
1374#endif
1375
1376#ifdef _WIN32 1463#ifdef _WIN32
1377 signal (signum, ev_sighandler); 1464 signal (signum, ev_sighandler);
1378#endif 1465#endif
1379 1466
1380 signals [signum - 1].pending = 1; 1467 ev_feed_signal (signum);
1381 evpipe_write (EV_A_ &sig_pending);
1382} 1468}
1383 1469
1384void noinline 1470void noinline
1385ev_feed_signal_event (EV_P_ int signum) 1471ev_feed_signal_event (EV_P_ int signum)
1386{ 1472{
… …
1486 1572
1487#endif 1573#endif
1488 1574
1489/*****************************************************************************/ 1575/*****************************************************************************/
1490 1576
1577#if EV_USE_IOCP
1578# include "ev_iocp.c"
1579#endif
1491#if EV_USE_PORT 1580#if EV_USE_PORT
1492# include "ev_port.c" 1581# include "ev_port.c"
1493#endif 1582#endif
1494#if EV_USE_KQUEUE 1583#if EV_USE_KQUEUE
1495# include "ev_kqueue.c" 1584# include "ev_kqueue.c"
… …
1635static void noinline 1724static void noinline
1636loop_init (EV_P_ unsigned int flags) 1725loop_init (EV_P_ unsigned int flags)
1637{ 1726{
1638 if (!backend) 1727 if (!backend)
1639 { 1728 {
1729 origflags = flags;
1730
1640#if EV_USE_REALTIME 1731#if EV_USE_REALTIME
1641 if (!have_realtime) 1732 if (!have_realtime)
1642 { 1733 {
1643 struct timespec ts; 1734 struct timespec ts;
1644 1735
… …
1689#endif 1780#endif
1690#if EV_USE_SIGNALFD 1781#if EV_USE_SIGNALFD
1691 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 1782 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1692#endif 1783#endif
1693 1784
1694 if (!(flags & 0x0000ffffU)) 1785 if (!(flags & EVBACKEND_MASK))
1695 flags |= ev_recommended_backends (); 1786 flags |= ev_recommended_backends ();
1696 1787
1788#if EV_USE_IOCP
1789 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1790#endif
1697#if EV_USE_PORT 1791#if EV_USE_PORT
1698 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1792 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1699#endif 1793#endif
1700#if EV_USE_KQUEUE 1794#if EV_USE_KQUEUE
1701 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1795 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1718#endif 1812#endif
1719 } 1813 }
1720} 1814}
1721 1815
1722/* free up a loop structure */ 1816/* free up a loop structure */
1723static void noinline 1817void
1724loop_destroy (EV_P) 1818ev_loop_destroy (EV_P)
1725{ 1819{
1726 int i; 1820 int i;
1821
1822#if EV_MULTIPLICITY
1823 /* mimic free (0) */
1824 if (!EV_A)
1825 return;
1826#endif
1827
1828#if EV_CLEANUP_ENABLE
1829 /* queue cleanup watchers (and execute them) */
1830 if (expect_false (cleanupcnt))
1831 {
1832 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1833 EV_INVOKE_PENDING;
1834 }
1835#endif
1836
1837#if EV_CHILD_ENABLE
1838 if (ev_is_active (&childev))
1839 {
1840 ev_ref (EV_A); /* child watcher */
1841 ev_signal_stop (EV_A_ &childev);
1842 }
1843#endif
1727 1844
1728 if (ev_is_active (&pipe_w)) 1845 if (ev_is_active (&pipe_w))
1729 { 1846 {
1730 /*ev_ref (EV_A);*/ 1847 /*ev_ref (EV_A);*/
1731 /*ev_io_stop (EV_A_ &pipe_w);*/ 1848 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1753#endif 1870#endif
1754 1871
1755 if (backend_fd >= 0) 1872 if (backend_fd >= 0)
1756 close (backend_fd); 1873 close (backend_fd);
1757 1874
1875#if EV_USE_IOCP
1876 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1877#endif
1758#if EV_USE_PORT 1878#if EV_USE_PORT
1759 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1879 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1760#endif 1880#endif
1761#if EV_USE_KQUEUE 1881#if EV_USE_KQUEUE
1762 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1882 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1789 array_free (periodic, EMPTY); 1909 array_free (periodic, EMPTY);
1790#endif 1910#endif
1791#if EV_FORK_ENABLE 1911#if EV_FORK_ENABLE
1792 array_free (fork, EMPTY); 1912 array_free (fork, EMPTY);
1793#endif 1913#endif
1914#if EV_CLEANUP_ENABLE
1915 array_free (cleanup, EMPTY);
1916#endif
1794 array_free (prepare, EMPTY); 1917 array_free (prepare, EMPTY);
1795 array_free (check, EMPTY); 1918 array_free (check, EMPTY);
1796#if EV_ASYNC_ENABLE 1919#if EV_ASYNC_ENABLE
1797 array_free (async, EMPTY); 1920 array_free (async, EMPTY);
1798#endif 1921#endif
1799 1922
1800 backend = 0; 1923 backend = 0;
1924
1925#if EV_MULTIPLICITY
1926 if (ev_is_default_loop (EV_A))
1927#endif
1928 ev_default_loop_ptr = 0;
1929#if EV_MULTIPLICITY
1930 else
1931 ev_free (EV_A);
1932#endif
1801} 1933}
1802 1934
1803#if EV_USE_INOTIFY 1935#if EV_USE_INOTIFY
1804inline_size void infy_fork (EV_P); 1936inline_size void infy_fork (EV_P);
1805#endif 1937#endif
… …
1864 loop_init (EV_A_ flags); 1996 loop_init (EV_A_ flags);
1865 1997
1866 if (ev_backend (EV_A)) 1998 if (ev_backend (EV_A))
1867 return EV_A; 1999 return EV_A;
1868 2000
2001 ev_free (EV_A);
1869 return 0; 2002 return 0;
1870} 2003}
1871 2004
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 */ 2005#endif /* multiplicity */
1885 2006
1886#if EV_VERIFY 2007#if EV_VERIFY
1887static void noinline 2008static void noinline
1888verify_watcher (EV_P_ W w) 2009verify_watcher (EV_P_ W w)
… …
1963#if EV_FORK_ENABLE 2084#if EV_FORK_ENABLE
1964 assert (forkmax >= forkcnt); 2085 assert (forkmax >= forkcnt);
1965 array_verify (EV_A_ (W *)forks, forkcnt); 2086 array_verify (EV_A_ (W *)forks, forkcnt);
1966#endif 2087#endif
1967 2088
2089#if EV_CLEANUP_ENABLE
2090 assert (cleanupmax >= cleanupcnt);
2091 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2092#endif
2093
1968#if EV_ASYNC_ENABLE 2094#if EV_ASYNC_ENABLE
1969 assert (asyncmax >= asynccnt); 2095 assert (asyncmax >= asynccnt);
1970 array_verify (EV_A_ (W *)asyncs, asynccnt); 2096 array_verify (EV_A_ (W *)asyncs, asynccnt);
1971#endif 2097#endif
1972 2098
… …
1990} 2116}
1991#endif 2117#endif
1992 2118
1993#if EV_MULTIPLICITY 2119#if EV_MULTIPLICITY
1994struct ev_loop * 2120struct ev_loop *
1995ev_default_loop_init (unsigned int flags)
1996#else 2121#else
1997int 2122int
2123#endif
1998ev_default_loop (unsigned int flags) 2124ev_default_loop (unsigned int flags)
1999#endif
2000{ 2125{
2001 if (!ev_default_loop_ptr) 2126 if (!ev_default_loop_ptr)
2002 { 2127 {
2003#if EV_MULTIPLICITY 2128#if EV_MULTIPLICITY
2004 EV_P = ev_default_loop_ptr = &default_loop_struct; 2129 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2023 2148
2024 return ev_default_loop_ptr; 2149 return ev_default_loop_ptr;
2025} 2150}
2026 2151
2027void 2152void
2028ev_default_destroy (void) 2153ev_loop_fork (EV_P)
2029{ 2154{
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 */ 2155 postfork = 1; /* must be in line with ev_default_fork */
2052} 2156}
2053 2157
2054/*****************************************************************************/ 2158/*****************************************************************************/
2055 2159
2056void 2160void
… …
2078 2182
2079 for (pri = NUMPRI; pri--; ) 2183 for (pri = NUMPRI; pri--; )
2080 while (pendingcnt [pri]) 2184 while (pendingcnt [pri])
2081 { 2185 {
2082 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2186 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 2187
2087 p->w->pending = 0; 2188 p->w->pending = 0;
2088 EV_CB_INVOKE (p->w, p->events); 2189 EV_CB_INVOKE (p->w, p->events);
2089 EV_FREQUENT_CHECK; 2190 EV_FREQUENT_CHECK;
2090 } 2191 }
… …
2152 feed_reverse_done (EV_A_ EV_TIMER); 2253 feed_reverse_done (EV_A_ EV_TIMER);
2153 } 2254 }
2154} 2255}
2155 2256
2156#if EV_PERIODIC_ENABLE 2257#if EV_PERIODIC_ENABLE
2258
2259static void noinline
2260periodic_recalc (EV_P_ ev_periodic *w)
2261{
2262 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2263 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2264
2265 /* the above almost always errs on the low side */
2266 while (at <= ev_rt_now)
2267 {
2268 ev_tstamp nat = at + w->interval;
2269
2270 /* when resolution fails us, we use ev_rt_now */
2271 if (expect_false (nat == at))
2272 {
2273 at = ev_rt_now;
2274 break;
2275 }
2276
2277 at = nat;
2278 }
2279
2280 ev_at (w) = at;
2281}
2282
2157/* make periodics pending */ 2283/* make periodics pending */
2158inline_size void 2284inline_size void
2159periodics_reify (EV_P) 2285periodics_reify (EV_P)
2160{ 2286{
2161 EV_FREQUENT_CHECK; 2287 EV_FREQUENT_CHECK;
… …
2180 ANHE_at_cache (periodics [HEAP0]); 2306 ANHE_at_cache (periodics [HEAP0]);
2181 downheap (periodics, periodiccnt, HEAP0); 2307 downheap (periodics, periodiccnt, HEAP0);
2182 } 2308 }
2183 else if (w->interval) 2309 else if (w->interval)
2184 { 2310 {
2185 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2311 periodic_recalc (EV_A_ w);
2186 /* if next trigger time is not sufficiently in the future, put it there */
2187 /* this might happen because of floating point inexactness */
2188 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2189 {
2190 ev_at (w) += w->interval;
2191
2192 /* if interval is unreasonably low we might still have a time in the past */
2193 /* so correct this. this will make the periodic very inexact, but the user */
2194 /* has effectively asked to get triggered more often than possible */
2195 if (ev_at (w) < ev_rt_now)
2196 ev_at (w) = ev_rt_now;
2197 }
2198
2199 ANHE_at_cache (periodics [HEAP0]); 2312 ANHE_at_cache (periodics [HEAP0]);
2200 downheap (periodics, periodiccnt, HEAP0); 2313 downheap (periodics, periodiccnt, HEAP0);
2201 } 2314 }
2202 else 2315 else
2203 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2316 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2224 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2337 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2225 2338
2226 if (w->reschedule_cb) 2339 if (w->reschedule_cb)
2227 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2340 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2228 else if (w->interval) 2341 else if (w->interval)
2229 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2342 periodic_recalc (EV_A_ w);
2230 2343
2231 ANHE_at_cache (periodics [i]); 2344 ANHE_at_cache (periodics [i]);
2232 } 2345 }
2233 2346
2234 reheap (periodics, periodiccnt); 2347 reheap (periodics, periodiccnt);
… …
2281 * doesn't hurt either as we only do this on time-jumps or 2394 * doesn't hurt either as we only do this on time-jumps or
2282 * in the unlikely event of having been preempted here. 2395 * in the unlikely event of having been preempted here.
2283 */ 2396 */
2284 for (i = 4; --i; ) 2397 for (i = 4; --i; )
2285 { 2398 {
2399 ev_tstamp diff;
2286 rtmn_diff = ev_rt_now - mn_now; 2400 rtmn_diff = ev_rt_now - mn_now;
2287 2401
2402 diff = odiff - rtmn_diff;
2403
2288 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2404 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2289 return; /* all is well */ 2405 return; /* all is well */
2290 2406
2291 ev_rt_now = ev_time (); 2407 ev_rt_now = ev_time ();
2292 mn_now = get_clock (); 2408 mn_now = get_clock ();
2293 now_floor = mn_now; 2409 now_floor = mn_now;
… …
2389 { 2505 {
2390 waittime = MAX_BLOCKTIME; 2506 waittime = MAX_BLOCKTIME;
2391 2507
2392 if (timercnt) 2508 if (timercnt)
2393 { 2509 {
2394 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2510 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2395 if (waittime > to) waittime = to; 2511 if (waittime > to) waittime = to;
2396 } 2512 }
2397 2513
2398#if EV_PERIODIC_ENABLE 2514#if EV_PERIODIC_ENABLE
2399 if (periodiccnt) 2515 if (periodiccnt)
2400 { 2516 {
2401 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2517 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2402 if (waittime > to) waittime = to; 2518 if (waittime > to) waittime = to;
2403 } 2519 }
2404#endif 2520#endif
2405 2521
2406 /* don't let timeouts decrease the waittime below timeout_blocktime */ 2522 /* don't let timeouts decrease the waittime below timeout_blocktime */
2407 if (expect_false (waittime < timeout_blocktime)) 2523 if (expect_false (waittime < timeout_blocktime))
2408 waittime = timeout_blocktime; 2524 waittime = timeout_blocktime;
2525
2526 /* at this point, we NEED to wait, so we have to ensure */
2527 /* to pass a minimum nonzero value to the backend */
2528 if (expect_false (waittime < backend_mintime))
2529 waittime = backend_mintime;
2409 2530
2410 /* extra check because io_blocktime is commonly 0 */ 2531 /* extra check because io_blocktime is commonly 0 */
2411 if (expect_false (io_blocktime)) 2532 if (expect_false (io_blocktime))
2412 { 2533 {
2413 sleeptime = io_blocktime - (mn_now - prev_mn_now); 2534 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2414 2535
2415 if (sleeptime > waittime - backend_fudge) 2536 if (sleeptime > waittime - backend_mintime)
2416 sleeptime = waittime - backend_fudge; 2537 sleeptime = waittime - backend_mintime;
2417 2538
2418 if (expect_true (sleeptime > 0.)) 2539 if (expect_true (sleeptime > 0.))
2419 { 2540 {
2420 ev_sleep (sleeptime); 2541 ev_sleep (sleeptime);
2421 waittime -= sleeptime; 2542 waittime -= sleeptime;
… …
2726 if (w->reschedule_cb) 2847 if (w->reschedule_cb)
2727 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2848 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2728 else if (w->interval) 2849 else if (w->interval)
2729 { 2850 {
2730 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 2851 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2731 /* this formula differs from the one in periodic_reify because we do not always round up */ 2852 periodic_recalc (EV_A_ w);
2732 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2733 } 2853 }
2734 else 2854 else
2735 ev_at (w) = w->offset; 2855 ev_at (w) = w->offset;
2736 2856
2737 EV_FREQUENT_CHECK; 2857 EV_FREQUENT_CHECK;
… …
2858 sa.sa_handler = ev_sighandler; 2978 sa.sa_handler = ev_sighandler;
2859 sigfillset (&sa.sa_mask); 2979 sigfillset (&sa.sa_mask);
2860 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2980 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2861 sigaction (w->signum, &sa, 0); 2981 sigaction (w->signum, &sa, 0);
2862 2982
2983 if (origflags & EVFLAG_NOSIGMASK)
2984 {
2863 sigemptyset (&sa.sa_mask); 2985 sigemptyset (&sa.sa_mask);
2864 sigaddset (&sa.sa_mask, w->signum); 2986 sigaddset (&sa.sa_mask, w->signum);
2865 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 2987 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2988 }
2866#endif 2989#endif
2867 } 2990 }
2868 2991
2869 EV_FREQUENT_CHECK; 2992 EV_FREQUENT_CHECK;
2870} 2993}
… …
3011 if (!pend || pend == path) 3134 if (!pend || pend == path)
3012 break; 3135 break;
3013 3136
3014 *pend = 0; 3137 *pend = 0;
3015 w->wd = inotify_add_watch (fs_fd, path, mask); 3138 w->wd = inotify_add_watch (fs_fd, path, mask);
3016 } 3139 }
3017 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3140 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3018 } 3141 }
3019 } 3142 }
3020 3143
3021 if (w->wd >= 0) 3144 if (w->wd >= 0)
… …
3562 3685
3563 EV_FREQUENT_CHECK; 3686 EV_FREQUENT_CHECK;
3564} 3687}
3565#endif 3688#endif
3566 3689
3690#if EV_CLEANUP_ENABLE
3691void
3692ev_cleanup_start (EV_P_ ev_cleanup *w)
3693{
3694 if (expect_false (ev_is_active (w)))
3695 return;
3696
3697 EV_FREQUENT_CHECK;
3698
3699 ev_start (EV_A_ (W)w, ++cleanupcnt);
3700 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3701 cleanups [cleanupcnt - 1] = w;
3702
3703 /* cleanup watchers should never keep a refcount on the loop */
3704 ev_unref (EV_A);
3705 EV_FREQUENT_CHECK;
3706}
3707
3708void
3709ev_cleanup_stop (EV_P_ ev_cleanup *w)
3710{
3711 clear_pending (EV_A_ (W)w);
3712 if (expect_false (!ev_is_active (w)))
3713 return;
3714
3715 EV_FREQUENT_CHECK;
3716 ev_ref (EV_A);
3717
3718 {
3719 int active = ev_active (w);
3720
3721 cleanups [active - 1] = cleanups [--cleanupcnt];
3722 ev_active (cleanups [active - 1]) = active;
3723 }
3724
3725 ev_stop (EV_A_ (W)w);
3726
3727 EV_FREQUENT_CHECK;
3728}
3729#endif
3730
3567#if EV_ASYNC_ENABLE 3731#if EV_ASYNC_ENABLE
3568void 3732void
3569ev_async_start (EV_P_ ev_async *w) 3733ev_async_start (EV_P_ ev_async *w)
3570{ 3734{
3571 if (expect_false (ev_is_active (w))) 3735 if (expect_false (ev_is_active (w)))

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