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Comparing libev/ev.c (file contents):
Revision 1.354 by root, Fri Oct 22 09:24:11 2010 UTC vs.
Revision 1.375 by root, Sat Jun 4 05:25:03 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
586static unsigned int noinline
587ev_linux_version (void)
588{
589#ifdef __linux
590 unsigned int v = 0;
591 struct utsname buf;
592 int i;
593 char *p = buf.release;
594
595 if (uname (&buf))
596 return 0;
597
598 for (i = 3+1; --i; )
599 {
600 unsigned int c = 0;
601
602 for (;;)
603 {
604 if (*p >= '0' && *p <= '9')
605 c = c * 10 + *p++ - '0';
606 else
607 {
608 p += *p == '.';
609 break;
610 }
611 }
612
613 v = (v << 8) | c;
614 }
615
616 return v;
617#else
618 return 0;
619#endif
620}
621
622/*****************************************************************************/
623
528#if EV_AVOID_STDIO 624#if EV_AVOID_STDIO
529static void noinline 625static void noinline
530ev_printerr (const char *msg) 626ev_printerr (const char *msg)
531{ 627{
532 write (STDERR_FILENO, msg, strlen (msg)); 628 write (STDERR_FILENO, msg, strlen (msg));
550 if (syserr_cb) 646 if (syserr_cb)
551 syserr_cb (msg); 647 syserr_cb (msg);
552 else 648 else
553 { 649 {
554#if EV_AVOID_STDIO 650#if EV_AVOID_STDIO
555 const char *err = strerror (errno);
556
557 ev_printerr (msg); 651 ev_printerr (msg);
558 ev_printerr (": "); 652 ev_printerr (": ");
559 ev_printerr (err); 653 ev_printerr (strerror (errno));
560 ev_printerr ("\n"); 654 ev_printerr ("\n");
561#else 655#else
562 perror (msg); 656 perror (msg);
563#endif 657#endif
564 abort (); 658 abort ();
598 ptr = alloc (ptr, size); 692 ptr = alloc (ptr, size);
599 693
600 if (!ptr && size) 694 if (!ptr && size)
601 { 695 {
602#if EV_AVOID_STDIO 696#if EV_AVOID_STDIO
603 ev_printerr ("libev: memory allocation failed, aborting.\n"); 697 ev_printerr ("(libev) memory allocation failed, aborting.\n");
604#else 698#else
605 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 699 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
606#endif 700#endif
607 abort (); 701 abort ();
608 } 702 }
609 703
610 return ptr; 704 return ptr;
627 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 */
628 unsigned char unused; 722 unsigned char unused;
629#if EV_USE_EPOLL 723#if EV_USE_EPOLL
630 unsigned int egen; /* generation counter to counter epoll bugs */ 724 unsigned int egen; /* generation counter to counter epoll bugs */
631#endif 725#endif
632#if EV_SELECT_IS_WINSOCKET 726#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
633 SOCKET handle; 727 SOCKET handle;
728#endif
729#if EV_USE_IOCP
730 OVERLAPPED or, ow;
634#endif 731#endif
635} ANFD; 732} ANFD;
636 733
637/* stores the pending event set for a given watcher */ 734/* stores the pending event set for a given watcher */
638typedef struct 735typedef struct
923inline_size void 1020inline_size void
924fd_reify (EV_P) 1021fd_reify (EV_P)
925{ 1022{
926 int i; 1023 int i;
927 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
928 for (i = 0; i < fdchangecnt; ++i) 1050 for (i = 0; i < fdchangecnt; ++i)
929 { 1051 {
930 int fd = fdchanges [i]; 1052 int fd = fdchanges [i];
931 ANFD *anfd = anfds + fd; 1053 ANFD *anfd = anfds + fd;
932 ev_io *w; 1054 ev_io *w;
933 1055
934 unsigned char o_events = anfd->events; 1056 unsigned char o_events = anfd->events;
935 unsigned char o_reify = anfd->reify; 1057 unsigned char o_reify = anfd->reify;
936 1058
937 anfd->reify = 0; 1059 anfd->reify = 0;
938
939#if EV_SELECT_IS_WINSOCKET
940 if (o_reify & EV__IOFDSET)
941 {
942 unsigned long arg;
943 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
944 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
945 }
946#endif
947 1060
948 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1061 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
949 { 1062 {
950 anfd->events = 0; 1063 anfd->events = 0;
951 1064
1300 char dummy; 1413 char dummy;
1301 /* 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 */
1302 read (evpipe [0], &dummy, 1); 1415 read (evpipe [0], &dummy, 1);
1303 } 1416 }
1304 1417
1418#if EV_SIGNAL_ENABLE
1305 if (sig_pending) 1419 if (sig_pending)
1306 { 1420 {
1307 sig_pending = 0; 1421 sig_pending = 0;
1308 1422
1309 for (i = EV_NSIG - 1; i--; ) 1423 for (i = EV_NSIG - 1; i--; )
1310 if (expect_false (signals [i].pending)) 1424 if (expect_false (signals [i].pending))
1311 ev_feed_signal_event (EV_A_ i + 1); 1425 ev_feed_signal_event (EV_A_ i + 1);
1312 } 1426 }
1427#endif
1313 1428
1314#if EV_ASYNC_ENABLE 1429#if EV_ASYNC_ENABLE
1315 if (async_pending) 1430 if (async_pending)
1316 { 1431 {
1317 async_pending = 0; 1432 async_pending = 0;
1326#endif 1441#endif
1327} 1442}
1328 1443
1329/*****************************************************************************/ 1444/*****************************************************************************/
1330 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
1331static void 1460static void
1332ev_sighandler (int signum) 1461ev_sighandler (int signum)
1333{ 1462{
1334#if EV_MULTIPLICITY
1335 EV_P = signals [signum - 1].loop;
1336#endif
1337
1338#ifdef _WIN32 1463#ifdef _WIN32
1339 signal (signum, ev_sighandler); 1464 signal (signum, ev_sighandler);
1340#endif 1465#endif
1341 1466
1342 signals [signum - 1].pending = 1; 1467 ev_feed_signal (signum);
1343 evpipe_write (EV_A_ &sig_pending);
1344} 1468}
1345 1469
1346void noinline 1470void noinline
1347ev_feed_signal_event (EV_P_ int signum) 1471ev_feed_signal_event (EV_P_ int signum)
1348{ 1472{
1448 1572
1449#endif 1573#endif
1450 1574
1451/*****************************************************************************/ 1575/*****************************************************************************/
1452 1576
1577#if EV_USE_IOCP
1578# include "ev_iocp.c"
1579#endif
1453#if EV_USE_PORT 1580#if EV_USE_PORT
1454# include "ev_port.c" 1581# include "ev_port.c"
1455#endif 1582#endif
1456#if EV_USE_KQUEUE 1583#if EV_USE_KQUEUE
1457# include "ev_kqueue.c" 1584# include "ev_kqueue.c"
1530ev_embeddable_backends (void) 1657ev_embeddable_backends (void)
1531{ 1658{
1532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1659 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1533 1660
1534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1661 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1535 /* please fix it and tell me how to detect the fix */ 1662 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1536 flags &= ~EVBACKEND_EPOLL; 1663 flags &= ~EVBACKEND_EPOLL;
1537 1664
1538 return flags; 1665 return flags;
1539} 1666}
1540 1667
1541unsigned int 1668unsigned int
1597static void noinline 1724static void noinline
1598loop_init (EV_P_ unsigned int flags) 1725loop_init (EV_P_ unsigned int flags)
1599{ 1726{
1600 if (!backend) 1727 if (!backend)
1601 { 1728 {
1729 origflags = flags;
1730
1602#if EV_USE_REALTIME 1731#if EV_USE_REALTIME
1603 if (!have_realtime) 1732 if (!have_realtime)
1604 { 1733 {
1605 struct timespec ts; 1734 struct timespec ts;
1606 1735
1651#endif 1780#endif
1652#if EV_USE_SIGNALFD 1781#if EV_USE_SIGNALFD
1653 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 1782 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1654#endif 1783#endif
1655 1784
1656 if (!(flags & 0x0000ffffU)) 1785 if (!(flags & EVBACKEND_MASK))
1657 flags |= ev_recommended_backends (); 1786 flags |= ev_recommended_backends ();
1658 1787
1788#if EV_USE_IOCP
1789 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1790#endif
1659#if EV_USE_PORT 1791#if EV_USE_PORT
1660 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1792 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1661#endif 1793#endif
1662#if EV_USE_KQUEUE 1794#if EV_USE_KQUEUE
1663 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1795 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1680#endif 1812#endif
1681 } 1813 }
1682} 1814}
1683 1815
1684/* free up a loop structure */ 1816/* free up a loop structure */
1685static void noinline 1817void
1686loop_destroy (EV_P) 1818ev_loop_destroy (EV_P)
1687{ 1819{
1688 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
1689 1844
1690 if (ev_is_active (&pipe_w)) 1845 if (ev_is_active (&pipe_w))
1691 { 1846 {
1692 /*ev_ref (EV_A);*/ 1847 /*ev_ref (EV_A);*/
1693 /*ev_io_stop (EV_A_ &pipe_w);*/ 1848 /*ev_io_stop (EV_A_ &pipe_w);*/
1715#endif 1870#endif
1716 1871
1717 if (backend_fd >= 0) 1872 if (backend_fd >= 0)
1718 close (backend_fd); 1873 close (backend_fd);
1719 1874
1875#if EV_USE_IOCP
1876 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1877#endif
1720#if EV_USE_PORT 1878#if EV_USE_PORT
1721 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1879 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1722#endif 1880#endif
1723#if EV_USE_KQUEUE 1881#if EV_USE_KQUEUE
1724 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1882 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1751 array_free (periodic, EMPTY); 1909 array_free (periodic, EMPTY);
1752#endif 1910#endif
1753#if EV_FORK_ENABLE 1911#if EV_FORK_ENABLE
1754 array_free (fork, EMPTY); 1912 array_free (fork, EMPTY);
1755#endif 1913#endif
1914#if EV_CLEANUP_ENABLE
1915 array_free (cleanup, EMPTY);
1916#endif
1756 array_free (prepare, EMPTY); 1917 array_free (prepare, EMPTY);
1757 array_free (check, EMPTY); 1918 array_free (check, EMPTY);
1758#if EV_ASYNC_ENABLE 1919#if EV_ASYNC_ENABLE
1759 array_free (async, EMPTY); 1920 array_free (async, EMPTY);
1760#endif 1921#endif
1761 1922
1762 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
1763} 1933}
1764 1934
1765#if EV_USE_INOTIFY 1935#if EV_USE_INOTIFY
1766inline_size void infy_fork (EV_P); 1936inline_size void infy_fork (EV_P);
1767#endif 1937#endif
1826 loop_init (EV_A_ flags); 1996 loop_init (EV_A_ flags);
1827 1997
1828 if (ev_backend (EV_A)) 1998 if (ev_backend (EV_A))
1829 return EV_A; 1999 return EV_A;
1830 2000
2001 ev_free (EV_A);
1831 return 0; 2002 return 0;
1832} 2003}
1833 2004
1834void
1835ev_loop_destroy (EV_P)
1836{
1837 loop_destroy (EV_A);
1838 ev_free (loop);
1839}
1840
1841void
1842ev_loop_fork (EV_P)
1843{
1844 postfork = 1; /* must be in line with ev_default_fork */
1845}
1846#endif /* multiplicity */ 2005#endif /* multiplicity */
1847 2006
1848#if EV_VERIFY 2007#if EV_VERIFY
1849static void noinline 2008static void noinline
1850verify_watcher (EV_P_ W w) 2009verify_watcher (EV_P_ W w)
1925#if EV_FORK_ENABLE 2084#if EV_FORK_ENABLE
1926 assert (forkmax >= forkcnt); 2085 assert (forkmax >= forkcnt);
1927 array_verify (EV_A_ (W *)forks, forkcnt); 2086 array_verify (EV_A_ (W *)forks, forkcnt);
1928#endif 2087#endif
1929 2088
2089#if EV_CLEANUP_ENABLE
2090 assert (cleanupmax >= cleanupcnt);
2091 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2092#endif
2093
1930#if EV_ASYNC_ENABLE 2094#if EV_ASYNC_ENABLE
1931 assert (asyncmax >= asynccnt); 2095 assert (asyncmax >= asynccnt);
1932 array_verify (EV_A_ (W *)asyncs, asynccnt); 2096 array_verify (EV_A_ (W *)asyncs, asynccnt);
1933#endif 2097#endif
1934 2098
1952} 2116}
1953#endif 2117#endif
1954 2118
1955#if EV_MULTIPLICITY 2119#if EV_MULTIPLICITY
1956struct ev_loop * 2120struct ev_loop *
1957ev_default_loop_init (unsigned int flags)
1958#else 2121#else
1959int 2122int
2123#endif
1960ev_default_loop (unsigned int flags) 2124ev_default_loop (unsigned int flags)
1961#endif
1962{ 2125{
1963 if (!ev_default_loop_ptr) 2126 if (!ev_default_loop_ptr)
1964 { 2127 {
1965#if EV_MULTIPLICITY 2128#if EV_MULTIPLICITY
1966 EV_P = ev_default_loop_ptr = &default_loop_struct; 2129 EV_P = ev_default_loop_ptr = &default_loop_struct;
1985 2148
1986 return ev_default_loop_ptr; 2149 return ev_default_loop_ptr;
1987} 2150}
1988 2151
1989void 2152void
1990ev_default_destroy (void) 2153ev_loop_fork (EV_P)
1991{ 2154{
1992#if EV_MULTIPLICITY
1993 EV_P = ev_default_loop_ptr;
1994#endif
1995
1996 ev_default_loop_ptr = 0;
1997
1998#if EV_CHILD_ENABLE
1999 ev_ref (EV_A); /* child watcher */
2000 ev_signal_stop (EV_A_ &childev);
2001#endif
2002
2003 loop_destroy (EV_A);
2004}
2005
2006void
2007ev_default_fork (void)
2008{
2009#if EV_MULTIPLICITY
2010 EV_P = ev_default_loop_ptr;
2011#endif
2012
2013 postfork = 1; /* must be in line with ev_loop_fork */ 2155 postfork = 1; /* must be in line with ev_default_fork */
2014} 2156}
2015 2157
2016/*****************************************************************************/ 2158/*****************************************************************************/
2017 2159
2018void 2160void
2040 2182
2041 for (pri = NUMPRI; pri--; ) 2183 for (pri = NUMPRI; pri--; )
2042 while (pendingcnt [pri]) 2184 while (pendingcnt [pri])
2043 { 2185 {
2044 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2186 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2045
2046 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2047 /* ^ this is no longer true, as pending_w could be here */
2048 2187
2049 p->w->pending = 0; 2188 p->w->pending = 0;
2050 EV_CB_INVOKE (p->w, p->events); 2189 EV_CB_INVOKE (p->w, p->events);
2051 EV_FREQUENT_CHECK; 2190 EV_FREQUENT_CHECK;
2052 } 2191 }
2114 feed_reverse_done (EV_A_ EV_TIMER); 2253 feed_reverse_done (EV_A_ EV_TIMER);
2115 } 2254 }
2116} 2255}
2117 2256
2118#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
2119/* make periodics pending */ 2283/* make periodics pending */
2120inline_size void 2284inline_size void
2121periodics_reify (EV_P) 2285periodics_reify (EV_P)
2122{ 2286{
2123 EV_FREQUENT_CHECK; 2287 EV_FREQUENT_CHECK;
2142 ANHE_at_cache (periodics [HEAP0]); 2306 ANHE_at_cache (periodics [HEAP0]);
2143 downheap (periodics, periodiccnt, HEAP0); 2307 downheap (periodics, periodiccnt, HEAP0);
2144 } 2308 }
2145 else if (w->interval) 2309 else if (w->interval)
2146 { 2310 {
2147 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2311 periodic_recalc (EV_A_ w);
2148 /* if next trigger time is not sufficiently in the future, put it there */
2149 /* this might happen because of floating point inexactness */
2150 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2151 {
2152 ev_at (w) += w->interval;
2153
2154 /* if interval is unreasonably low we might still have a time in the past */
2155 /* so correct this. this will make the periodic very inexact, but the user */
2156 /* has effectively asked to get triggered more often than possible */
2157 if (ev_at (w) < ev_rt_now)
2158 ev_at (w) = ev_rt_now;
2159 }
2160
2161 ANHE_at_cache (periodics [HEAP0]); 2312 ANHE_at_cache (periodics [HEAP0]);
2162 downheap (periodics, periodiccnt, HEAP0); 2313 downheap (periodics, periodiccnt, HEAP0);
2163 } 2314 }
2164 else 2315 else
2165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2316 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2186 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2337 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2187 2338
2188 if (w->reschedule_cb) 2339 if (w->reschedule_cb)
2189 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2340 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2190 else if (w->interval) 2341 else if (w->interval)
2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2342 periodic_recalc (EV_A_ w);
2192 2343
2193 ANHE_at_cache (periodics [i]); 2344 ANHE_at_cache (periodics [i]);
2194 } 2345 }
2195 2346
2196 reheap (periodics, periodiccnt); 2347 reheap (periodics, periodiccnt);
2243 * 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
2244 * in the unlikely event of having been preempted here. 2395 * in the unlikely event of having been preempted here.
2245 */ 2396 */
2246 for (i = 4; --i; ) 2397 for (i = 4; --i; )
2247 { 2398 {
2399 ev_tstamp diff;
2248 rtmn_diff = ev_rt_now - mn_now; 2400 rtmn_diff = ev_rt_now - mn_now;
2249 2401
2402 diff = odiff - rtmn_diff;
2403
2250 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2404 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2251 return; /* all is well */ 2405 return; /* all is well */
2252 2406
2253 ev_rt_now = ev_time (); 2407 ev_rt_now = ev_time ();
2254 mn_now = get_clock (); 2408 mn_now = get_clock ();
2255 now_floor = mn_now; 2409 now_floor = mn_now;
2688 if (w->reschedule_cb) 2842 if (w->reschedule_cb)
2689 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2843 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2690 else if (w->interval) 2844 else if (w->interval)
2691 { 2845 {
2692 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 2846 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2693 /* this formula differs from the one in periodic_reify because we do not always round up */ 2847 periodic_recalc (EV_A_ w);
2694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2695 } 2848 }
2696 else 2849 else
2697 ev_at (w) = w->offset; 2850 ev_at (w) = w->offset;
2698 2851
2699 EV_FREQUENT_CHECK; 2852 EV_FREQUENT_CHECK;
2820 sa.sa_handler = ev_sighandler; 2973 sa.sa_handler = ev_sighandler;
2821 sigfillset (&sa.sa_mask); 2974 sigfillset (&sa.sa_mask);
2822 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2975 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2823 sigaction (w->signum, &sa, 0); 2976 sigaction (w->signum, &sa, 0);
2824 2977
2978 if (origflags & EVFLAG_NOSIGMASK)
2979 {
2825 sigemptyset (&sa.sa_mask); 2980 sigemptyset (&sa.sa_mask);
2826 sigaddset (&sa.sa_mask, w->signum); 2981 sigaddset (&sa.sa_mask, w->signum);
2827 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 2982 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2983 }
2828#endif 2984#endif
2829 } 2985 }
2830 2986
2831 EV_FREQUENT_CHECK; 2987 EV_FREQUENT_CHECK;
2832} 2988}
2973 if (!pend || pend == path) 3129 if (!pend || pend == path)
2974 break; 3130 break;
2975 3131
2976 *pend = 0; 3132 *pend = 0;
2977 w->wd = inotify_add_watch (fs_fd, path, mask); 3133 w->wd = inotify_add_watch (fs_fd, path, mask);
2978 } 3134 }
2979 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3135 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2980 } 3136 }
2981 } 3137 }
2982 3138
2983 if (w->wd >= 0) 3139 if (w->wd >= 0)
3048 { 3204 {
3049 struct inotify_event *ev = (struct inotify_event *)(buf + ofs); 3205 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3050 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3206 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3051 ofs += sizeof (struct inotify_event) + ev->len; 3207 ofs += sizeof (struct inotify_event) + ev->len;
3052 } 3208 }
3053}
3054
3055inline_size unsigned int
3056ev_linux_version (void)
3057{
3058 struct utsname buf;
3059 unsigned int v;
3060 int i;
3061 char *p = buf.release;
3062
3063 if (uname (&buf))
3064 return 0;
3065
3066 for (i = 3+1; --i; )
3067 {
3068 unsigned int c = 0;
3069
3070 for (;;)
3071 {
3072 if (*p >= '0' && *p <= '9')
3073 c = c * 10 + *p++ - '0';
3074 else
3075 {
3076 p += *p == '.';
3077 break;
3078 }
3079 }
3080
3081 v = (v << 8) | c;
3082 }
3083
3084 return v;
3085} 3209}
3086 3210
3087inline_size void 3211inline_size void
3088ev_check_2625 (EV_P) 3212ev_check_2625 (EV_P)
3089{ 3213{
3556 3680
3557 EV_FREQUENT_CHECK; 3681 EV_FREQUENT_CHECK;
3558} 3682}
3559#endif 3683#endif
3560 3684
3685#if EV_CLEANUP_ENABLE
3686void
3687ev_cleanup_start (EV_P_ ev_cleanup *w)
3688{
3689 if (expect_false (ev_is_active (w)))
3690 return;
3691
3692 EV_FREQUENT_CHECK;
3693
3694 ev_start (EV_A_ (W)w, ++cleanupcnt);
3695 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3696 cleanups [cleanupcnt - 1] = w;
3697
3698 /* cleanup watchers should never keep a refcount on the loop */
3699 ev_unref (EV_A);
3700 EV_FREQUENT_CHECK;
3701}
3702
3703void
3704ev_cleanup_stop (EV_P_ ev_cleanup *w)
3705{
3706 clear_pending (EV_A_ (W)w);
3707 if (expect_false (!ev_is_active (w)))
3708 return;
3709
3710 EV_FREQUENT_CHECK;
3711 ev_ref (EV_A);
3712
3713 {
3714 int active = ev_active (w);
3715
3716 cleanups [active - 1] = cleanups [--cleanupcnt];
3717 ev_active (cleanups [active - 1]) = active;
3718 }
3719
3720 ev_stop (EV_A_ (W)w);
3721
3722 EV_FREQUENT_CHECK;
3723}
3724#endif
3725
3561#if EV_ASYNC_ENABLE 3726#if EV_ASYNC_ENABLE
3562void 3727void
3563ev_async_start (EV_P_ ev_async *w) 3728ev_async_start (EV_P_ ev_async *w)
3564{ 3729{
3565 if (expect_false (ev_is_active (w))) 3730 if (expect_false (ev_is_active (w)))

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