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Comparing libev/ev.c (file contents):
Revision 1.270 by root, Thu Oct 30 13:07:10 2008 UTC vs.
Revision 1.283 by root, Wed Apr 15 09:51:19 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 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 *
47# include EV_CONFIG_H 47# include EV_CONFIG_H
48# else 48# else
49# include "config.h" 49# include "config.h"
50# endif 50# endif
51 51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# endif
63
52# if HAVE_CLOCK_GETTIME 64# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC 65# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1 66# define EV_USE_MONOTONIC 1
55# endif 67# endif
56# ifndef EV_USE_REALTIME 68# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1 69# define EV_USE_REALTIME 0
58# endif 70# endif
59# else 71# else
60# ifndef EV_USE_MONOTONIC 72# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0 73# define EV_USE_MONOTONIC 0
62# endif 74# endif
164# endif 176# endif
165#endif 177#endif
166 178
167/* this block tries to deduce configuration from header-defined symbols and defaults */ 179/* this block tries to deduce configuration from header-defined symbols and defaults */
168 180
181#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1
184# else
185# define EV_USE_CLOCK_SYSCALL 0
186# endif
187#endif
188
169#ifndef EV_USE_MONOTONIC 189#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171# define EV_USE_MONOTONIC 1 191# define EV_USE_MONOTONIC 1
172# else 192# else
173# define EV_USE_MONOTONIC 0 193# define EV_USE_MONOTONIC 0
174# endif 194# endif
175#endif 195#endif
176 196
177#ifndef EV_USE_REALTIME 197#ifndef EV_USE_REALTIME
178# define EV_USE_REALTIME 0 198# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
179#endif 199#endif
180 200
181#ifndef EV_USE_NANOSLEEP 201#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L 202# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1 203# define EV_USE_NANOSLEEP 1
287# endif 307# endif
288#endif 308#endif
289 309
290#if EV_USE_INOTIFY 310#if EV_USE_INOTIFY
291# include <sys/utsname.h> 311# include <sys/utsname.h>
312# include <sys/statfs.h>
292# include <sys/inotify.h> 313# include <sys/inotify.h>
293/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294# ifndef IN_DONT_FOLLOW 315# ifndef IN_DONT_FOLLOW
295# undef EV_USE_INOTIFY 316# undef EV_USE_INOTIFY
296# define EV_USE_INOTIFY 0 317# define EV_USE_INOTIFY 0
297# endif 318# endif
298#endif 319#endif
299 320
300#if EV_SELECT_IS_WINSOCKET 321#if EV_SELECT_IS_WINSOCKET
301# include <winsock.h> 322# include <winsock.h>
323#endif
324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
302#endif 332#endif
303 333
304#if EV_USE_EVENTFD 334#if EV_USE_EVENTFD
305/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306# include <stdint.h> 336# include <stdint.h>
367typedef ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
368 398
369#define ev_active(w) ((W)(w))->active 399#define ev_active(w) ((W)(w))->active
370#define ev_at(w) ((WT)(w))->at 400#define ev_at(w) ((WT)(w))->at
371 401
372#if EV_USE_MONOTONIC 402#if EV_USE_REALTIME
373/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
374/* giving it a reasonably high chance of working on typical architetcures */ 404/* giving it a reasonably high chance of working on typical architetcures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif
407
408#if EV_USE_MONOTONIC
375static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376#endif 410#endif
377 411
378#ifdef _WIN32 412#ifdef _WIN32
379# include "ev_win32.c" 413# include "ev_win32.c"
523 557
524ev_tstamp 558ev_tstamp
525ev_time (void) 559ev_time (void)
526{ 560{
527#if EV_USE_REALTIME 561#if EV_USE_REALTIME
562 if (expect_true (have_realtime))
563 {
528 struct timespec ts; 564 struct timespec ts;
529 clock_gettime (CLOCK_REALTIME, &ts); 565 clock_gettime (CLOCK_REALTIME, &ts);
530 return ts.tv_sec + ts.tv_nsec * 1e-9; 566 return ts.tv_sec + ts.tv_nsec * 1e-9;
531#else 567 }
568#endif
569
532 struct timeval tv; 570 struct timeval tv;
533 gettimeofday (&tv, 0); 571 gettimeofday (&tv, 0);
534 return tv.tv_sec + tv.tv_usec * 1e-6; 572 return tv.tv_sec + tv.tv_usec * 1e-6;
535#endif
536} 573}
537 574
538ev_tstamp inline_size 575ev_tstamp inline_size
539get_clock (void) 576get_clock (void)
540{ 577{
639 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 676 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
640 } 677 }
641#endif 678#endif
642 679
643#define array_free(stem, idx) \ 680#define array_free(stem, idx) \
644 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 681 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
645 682
646/*****************************************************************************/ 683/*****************************************************************************/
647 684
648void noinline 685void noinline
649ev_feed_event (EV_P_ void *w, int revents) 686ev_feed_event (EV_P_ void *w, int revents)
718 #ifdef EV_FD_TO_WIN32_HANDLE 755 #ifdef EV_FD_TO_WIN32_HANDLE
719 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 756 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
720 #else 757 #else
721 anfd->handle = _get_osfhandle (fd); 758 anfd->handle = _get_osfhandle (fd);
722 #endif 759 #endif
723 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 760 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
724 } 761 }
725#endif 762#endif
726 763
727 { 764 {
728 unsigned char o_events = anfd->events; 765 unsigned char o_events = anfd->events;
729 unsigned char o_reify = anfd->reify; 766 unsigned char o_reify = anfd->reify;
730 767
731 anfd->reify = 0; 768 anfd->reify = 0;
732 anfd->events = events; 769 anfd->events = events;
733 770
734 if (o_events != events || o_reify & EV_IOFDSET) 771 if (o_events != events || o_reify & EV__IOFDSET)
735 backend_modify (EV_A_ fd, o_events, events); 772 backend_modify (EV_A_ fd, o_events, events);
736 } 773 }
737 } 774 }
738 775
739 fdchangecnt = 0; 776 fdchangecnt = 0;
810 for (fd = 0; fd < anfdmax; ++fd) 847 for (fd = 0; fd < anfdmax; ++fd)
811 if (anfds [fd].events) 848 if (anfds [fd].events)
812 { 849 {
813 anfds [fd].events = 0; 850 anfds [fd].events = 0;
814 anfds [fd].emask = 0; 851 anfds [fd].emask = 0;
815 fd_change (EV_A_ fd, EV_IOFDSET | 1); 852 fd_change (EV_A_ fd, EV__IOFDSET | 1);
816 } 853 }
817} 854}
818 855
819/*****************************************************************************/ 856/*****************************************************************************/
820 857
1101ev_feed_signal_event (EV_P_ int signum) 1138ev_feed_signal_event (EV_P_ int signum)
1102{ 1139{
1103 WL w; 1140 WL w;
1104 1141
1105#if EV_MULTIPLICITY 1142#if EV_MULTIPLICITY
1106 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 1143 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1107#endif 1144#endif
1108 1145
1109 --signum; 1146 --signum;
1110 1147
1111 if (signum < 0 || signum >= signalmax) 1148 if (signum < 0 || signum >= signalmax)
1240 /* kqueue is borked on everything but netbsd apparently */ 1277 /* kqueue is borked on everything but netbsd apparently */
1241 /* it usually doesn't work correctly on anything but sockets and pipes */ 1278 /* it usually doesn't work correctly on anything but sockets and pipes */
1242 flags &= ~EVBACKEND_KQUEUE; 1279 flags &= ~EVBACKEND_KQUEUE;
1243#endif 1280#endif
1244#ifdef __APPLE__ 1281#ifdef __APPLE__
1245 // flags &= ~EVBACKEND_KQUEUE; for documentation 1282 /* only select works correctly on that "unix-certified" platform */
1246 flags &= ~EVBACKEND_POLL; 1283 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1284 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1247#endif 1285#endif
1248 1286
1249 return flags; 1287 return flags;
1250} 1288}
1251 1289
1288static void noinline 1326static void noinline
1289loop_init (EV_P_ unsigned int flags) 1327loop_init (EV_P_ unsigned int flags)
1290{ 1328{
1291 if (!backend) 1329 if (!backend)
1292 { 1330 {
1331#if EV_USE_REALTIME
1332 if (!have_realtime)
1333 {
1334 struct timespec ts;
1335
1336 if (!clock_gettime (CLOCK_REALTIME, &ts))
1337 have_realtime = 1;
1338 }
1339#endif
1340
1293#if EV_USE_MONOTONIC 1341#if EV_USE_MONOTONIC
1342 if (!have_monotonic)
1294 { 1343 {
1295 struct timespec ts; 1344 struct timespec ts;
1345
1296 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1346 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1297 have_monotonic = 1; 1347 have_monotonic = 1;
1298 } 1348 }
1299#endif 1349#endif
1300 1350
1301 ev_rt_now = ev_time (); 1351 ev_rt_now = ev_time ();
1302 mn_now = get_clock (); 1352 mn_now = get_clock ();
1303 now_floor = mn_now; 1353 now_floor = mn_now;
1504 1554
1505#if EV_VERIFY 1555#if EV_VERIFY
1506static void noinline 1556static void noinline
1507verify_watcher (EV_P_ W w) 1557verify_watcher (EV_P_ W w)
1508{ 1558{
1509 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 1559 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1510 1560
1511 if (w->pending) 1561 if (w->pending)
1512 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 1562 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1513} 1563}
1514 1564
1515static void noinline 1565static void noinline
1516verify_heap (EV_P_ ANHE *heap, int N) 1566verify_heap (EV_P_ ANHE *heap, int N)
1517{ 1567{
1518 int i; 1568 int i;
1519 1569
1520 for (i = HEAP0; i < N + HEAP0; ++i) 1570 for (i = HEAP0; i < N + HEAP0; ++i)
1521 { 1571 {
1522 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); 1572 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1523 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); 1573 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1524 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); 1574 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1525 1575
1526 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 1576 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1527 } 1577 }
1528} 1578}
1529 1579
1530static void noinline 1580static void noinline
1531array_verify (EV_P_ W *ws, int cnt) 1581array_verify (EV_P_ W *ws, int cnt)
1532{ 1582{
1533 while (cnt--) 1583 while (cnt--)
1534 { 1584 {
1535 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 1585 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1536 verify_watcher (EV_A_ ws [cnt]); 1586 verify_watcher (EV_A_ ws [cnt]);
1537 } 1587 }
1538} 1588}
1539#endif 1589#endif
1540 1590
1547 1597
1548 assert (activecnt >= -1); 1598 assert (activecnt >= -1);
1549 1599
1550 assert (fdchangemax >= fdchangecnt); 1600 assert (fdchangemax >= fdchangecnt);
1551 for (i = 0; i < fdchangecnt; ++i) 1601 for (i = 0; i < fdchangecnt; ++i)
1552 assert (("negative fd in fdchanges", fdchanges [i] >= 0)); 1602 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1553 1603
1554 assert (anfdmax >= 0); 1604 assert (anfdmax >= 0);
1555 for (i = 0; i < anfdmax; ++i) 1605 for (i = 0; i < anfdmax; ++i)
1556 for (w = anfds [i].head; w; w = w->next) 1606 for (w = anfds [i].head; w; w = w->next)
1557 { 1607 {
1558 verify_watcher (EV_A_ (W)w); 1608 verify_watcher (EV_A_ (W)w);
1559 assert (("inactive fd watcher on anfd list", ev_active (w) == 1)); 1609 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1560 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 1610 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1561 } 1611 }
1562 1612
1563 assert (timermax >= timercnt); 1613 assert (timermax >= timercnt);
1564 verify_heap (EV_A_ timers, timercnt); 1614 verify_heap (EV_A_ timers, timercnt);
1565 1615
1682 { 1732 {
1683 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1733 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1684 1734
1685 if (expect_true (p->w)) 1735 if (expect_true (p->w))
1686 { 1736 {
1687 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 1737 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1688 1738
1689 p->w->pending = 0; 1739 p->w->pending = 0;
1690 EV_CB_INVOKE (p->w, p->events); 1740 EV_CB_INVOKE (p->w, p->events);
1691 EV_FREQUENT_CHECK; 1741 EV_FREQUENT_CHECK;
1692 } 1742 }
1723 1773
1724 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now) 1774 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1725 { 1775 {
1726 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); 1776 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1727 1777
1728 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/ 1778 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1729 1779
1730 /* first reschedule or stop timer */ 1780 /* first reschedule or stop timer */
1731 if (w->repeat) 1781 if (w->repeat)
1732 { 1782 {
1733 ev_at (w) += w->repeat; 1783 ev_at (w) += w->repeat;
1734 if (ev_at (w) < mn_now) 1784 if (ev_at (w) < mn_now)
1735 ev_at (w) = mn_now; 1785 ev_at (w) = mn_now;
1736 1786
1737 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1787 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1738 1788
1739 ANHE_at_cache (timers [HEAP0]); 1789 ANHE_at_cache (timers [HEAP0]);
1740 downheap (timers, timercnt, HEAP0); 1790 downheap (timers, timercnt, HEAP0);
1741 } 1791 }
1742 else 1792 else
1755 1805
1756 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 1806 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1757 { 1807 {
1758 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 1808 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1759 1809
1760 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 1810 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1761 1811
1762 /* first reschedule or stop timer */ 1812 /* first reschedule or stop timer */
1763 if (w->reschedule_cb) 1813 if (w->reschedule_cb)
1764 { 1814 {
1765 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 1815 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1766 1816
1767 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); 1817 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1768 1818
1769 ANHE_at_cache (periodics [HEAP0]); 1819 ANHE_at_cache (periodics [HEAP0]);
1770 downheap (periodics, periodiccnt, HEAP0); 1820 downheap (periodics, periodiccnt, HEAP0);
1771 } 1821 }
1772 else if (w->interval) 1822 else if (w->interval)
1947 { 1997 {
1948 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1998 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1949 call_pending (EV_A); 1999 call_pending (EV_A);
1950 } 2000 }
1951 2001
1952 if (expect_false (!activecnt))
1953 break;
1954
1955 /* we might have forked, so reify kernel state if necessary */ 2002 /* we might have forked, so reify kernel state if necessary */
1956 if (expect_false (postfork)) 2003 if (expect_false (postfork))
1957 loop_fork (EV_A); 2004 loop_fork (EV_A);
1958 2005
1959 /* update fd-related kernel structures */ 2006 /* update fd-related kernel structures */
2123 int fd = w->fd; 2170 int fd = w->fd;
2124 2171
2125 if (expect_false (ev_is_active (w))) 2172 if (expect_false (ev_is_active (w)))
2126 return; 2173 return;
2127 2174
2128 assert (("ev_io_start called with negative fd", fd >= 0)); 2175 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2129 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE)))); 2176 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2130 2177
2131 EV_FREQUENT_CHECK; 2178 EV_FREQUENT_CHECK;
2132 2179
2133 ev_start (EV_A_ (W)w, 1); 2180 ev_start (EV_A_ (W)w, 1);
2134 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 2181 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2135 wlist_add (&anfds[fd].head, (WL)w); 2182 wlist_add (&anfds[fd].head, (WL)w);
2136 2183
2137 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 2184 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2138 w->events &= ~EV_IOFDSET; 2185 w->events &= ~EV__IOFDSET;
2139 2186
2140 EV_FREQUENT_CHECK; 2187 EV_FREQUENT_CHECK;
2141} 2188}
2142 2189
2143void noinline 2190void noinline
2145{ 2192{
2146 clear_pending (EV_A_ (W)w); 2193 clear_pending (EV_A_ (W)w);
2147 if (expect_false (!ev_is_active (w))) 2194 if (expect_false (!ev_is_active (w)))
2148 return; 2195 return;
2149 2196
2150 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2197 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2151 2198
2152 EV_FREQUENT_CHECK; 2199 EV_FREQUENT_CHECK;
2153 2200
2154 wlist_del (&anfds[w->fd].head, (WL)w); 2201 wlist_del (&anfds[w->fd].head, (WL)w);
2155 ev_stop (EV_A_ (W)w); 2202 ev_stop (EV_A_ (W)w);
2165 if (expect_false (ev_is_active (w))) 2212 if (expect_false (ev_is_active (w)))
2166 return; 2213 return;
2167 2214
2168 ev_at (w) += mn_now; 2215 ev_at (w) += mn_now;
2169 2216
2170 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2217 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2171 2218
2172 EV_FREQUENT_CHECK; 2219 EV_FREQUENT_CHECK;
2173 2220
2174 ++timercnt; 2221 ++timercnt;
2175 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 2222 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2178 ANHE_at_cache (timers [ev_active (w)]); 2225 ANHE_at_cache (timers [ev_active (w)]);
2179 upheap (timers, ev_active (w)); 2226 upheap (timers, ev_active (w));
2180 2227
2181 EV_FREQUENT_CHECK; 2228 EV_FREQUENT_CHECK;
2182 2229
2183 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 2230 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2184} 2231}
2185 2232
2186void noinline 2233void noinline
2187ev_timer_stop (EV_P_ ev_timer *w) 2234ev_timer_stop (EV_P_ ev_timer *w)
2188{ 2235{
2193 EV_FREQUENT_CHECK; 2240 EV_FREQUENT_CHECK;
2194 2241
2195 { 2242 {
2196 int active = ev_active (w); 2243 int active = ev_active (w);
2197 2244
2198 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 2245 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2199 2246
2200 --timercnt; 2247 --timercnt;
2201 2248
2202 if (expect_true (active < timercnt + HEAP0)) 2249 if (expect_true (active < timercnt + HEAP0))
2203 { 2250 {
2247 2294
2248 if (w->reschedule_cb) 2295 if (w->reschedule_cb)
2249 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2296 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2250 else if (w->interval) 2297 else if (w->interval)
2251 { 2298 {
2252 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2299 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2253 /* this formula differs from the one in periodic_reify because we do not always round up */ 2300 /* this formula differs from the one in periodic_reify because we do not always round up */
2254 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2301 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2255 } 2302 }
2256 else 2303 else
2257 ev_at (w) = w->offset; 2304 ev_at (w) = w->offset;
2265 ANHE_at_cache (periodics [ev_active (w)]); 2312 ANHE_at_cache (periodics [ev_active (w)]);
2266 upheap (periodics, ev_active (w)); 2313 upheap (periodics, ev_active (w));
2267 2314
2268 EV_FREQUENT_CHECK; 2315 EV_FREQUENT_CHECK;
2269 2316
2270 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 2317 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2271} 2318}
2272 2319
2273void noinline 2320void noinline
2274ev_periodic_stop (EV_P_ ev_periodic *w) 2321ev_periodic_stop (EV_P_ ev_periodic *w)
2275{ 2322{
2280 EV_FREQUENT_CHECK; 2327 EV_FREQUENT_CHECK;
2281 2328
2282 { 2329 {
2283 int active = ev_active (w); 2330 int active = ev_active (w);
2284 2331
2285 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 2332 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2286 2333
2287 --periodiccnt; 2334 --periodiccnt;
2288 2335
2289 if (expect_true (active < periodiccnt + HEAP0)) 2336 if (expect_true (active < periodiccnt + HEAP0))
2290 { 2337 {
2313 2360
2314void noinline 2361void noinline
2315ev_signal_start (EV_P_ ev_signal *w) 2362ev_signal_start (EV_P_ ev_signal *w)
2316{ 2363{
2317#if EV_MULTIPLICITY 2364#if EV_MULTIPLICITY
2318 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2365 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2319#endif 2366#endif
2320 if (expect_false (ev_is_active (w))) 2367 if (expect_false (ev_is_active (w)))
2321 return; 2368 return;
2322 2369
2323 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2370 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2324 2371
2325 evpipe_init (EV_A); 2372 evpipe_init (EV_A);
2326 2373
2327 EV_FREQUENT_CHECK; 2374 EV_FREQUENT_CHECK;
2328 2375
2379 2426
2380void 2427void
2381ev_child_start (EV_P_ ev_child *w) 2428ev_child_start (EV_P_ ev_child *w)
2382{ 2429{
2383#if EV_MULTIPLICITY 2430#if EV_MULTIPLICITY
2384 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2431 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2385#endif 2432#endif
2386 if (expect_false (ev_is_active (w))) 2433 if (expect_false (ev_is_active (w)))
2387 return; 2434 return;
2388 2435
2389 EV_FREQUENT_CHECK; 2436 EV_FREQUENT_CHECK;
2414# ifdef _WIN32 2461# ifdef _WIN32
2415# undef lstat 2462# undef lstat
2416# define lstat(a,b) _stati64 (a,b) 2463# define lstat(a,b) _stati64 (a,b)
2417# endif 2464# endif
2418 2465
2419#define DEF_STAT_INTERVAL 5.0074891 2466#define DEF_STAT_INTERVAL 5.0074891
2467#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2420#define MIN_STAT_INTERVAL 0.1074891 2468#define MIN_STAT_INTERVAL 0.1074891
2421 2469
2422static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 2470static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2423 2471
2424#if EV_USE_INOTIFY 2472#if EV_USE_INOTIFY
2425# define EV_INOTIFY_BUFSIZE 8192 2473# define EV_INOTIFY_BUFSIZE 8192
2429{ 2477{
2430 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 2478 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2431 2479
2432 if (w->wd < 0) 2480 if (w->wd < 0)
2433 { 2481 {
2482 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2434 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 2483 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2435 2484
2436 /* monitor some parent directory for speedup hints */ 2485 /* monitor some parent directory for speedup hints */
2437 /* note that exceeding the hardcoded limit is not a correctness issue, */ 2486 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2438 /* but an efficiency issue only */ 2487 /* but an efficiency issue only */
2439 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2488 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2440 { 2489 {
2441 char path [4096]; 2490 char path [4096];
2442 strcpy (path, w->path); 2491 strcpy (path, w->path);
2446 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 2495 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2447 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 2496 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2448 2497
2449 char *pend = strrchr (path, '/'); 2498 char *pend = strrchr (path, '/');
2450 2499
2451 if (!pend) 2500 if (!pend || pend == path)
2452 break; /* whoops, no '/', complain to your admin */ 2501 break;
2453 2502
2454 *pend = 0; 2503 *pend = 0;
2455 w->wd = inotify_add_watch (fs_fd, path, mask); 2504 w->wd = inotify_add_watch (fs_fd, path, mask);
2456 } 2505 }
2457 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2506 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2458 } 2507 }
2459 } 2508 }
2460 else
2461 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2462 2509
2463 if (w->wd >= 0) 2510 if (w->wd >= 0)
2511 {
2464 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2512 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2513
2514 /* now local changes will be tracked by inotify, but remote changes won't */
2515 /* unless the filesystem it known to be local, we therefore still poll */
2516 /* also do poll on <2.6.25, but with normal frequency */
2517 struct statfs sfs;
2518
2519 if (fs_2625 && !statfs (w->path, &sfs))
2520 if (sfs.f_type == 0x1373 /* devfs */
2521 || sfs.f_type == 0xEF53 /* ext2/3 */
2522 || sfs.f_type == 0x3153464a /* jfs */
2523 || sfs.f_type == 0x52654973 /* reiser3 */
2524 || sfs.f_type == 0x01021994 /* tempfs */
2525 || sfs.f_type == 0x58465342 /* xfs */)
2526 return;
2527
2528 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2529 ev_timer_again (EV_A_ &w->timer);
2530 }
2465} 2531}
2466 2532
2467static void noinline 2533static void noinline
2468infy_del (EV_P_ ev_stat *w) 2534infy_del (EV_P_ ev_stat *w)
2469{ 2535{
2499 2565
2500 if (w->wd == wd || wd == -1) 2566 if (w->wd == wd || wd == -1)
2501 { 2567 {
2502 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 2568 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2503 { 2569 {
2570 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2504 w->wd = -1; 2571 w->wd = -1;
2505 infy_add (EV_A_ w); /* re-add, no matter what */ 2572 infy_add (EV_A_ w); /* re-add, no matter what */
2506 } 2573 }
2507 2574
2508 stat_timer_cb (EV_A_ &w->timer, 0); 2575 stat_timer_cb (EV_A_ &w->timer, 0);
2522 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 2589 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2523 infy_wd (EV_A_ ev->wd, ev->wd, ev); 2590 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2524} 2591}
2525 2592
2526void inline_size 2593void inline_size
2527infy_init (EV_P) 2594check_2625 (EV_P)
2528{ 2595{
2529 if (fs_fd != -2)
2530 return;
2531
2532 /* kernels < 2.6.25 are borked 2596 /* kernels < 2.6.25 are borked
2533 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 2597 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2534 */ 2598 */
2535 {
2536 struct utsname buf; 2599 struct utsname buf;
2537 int major, minor, micro; 2600 int major, minor, micro;
2538 2601
2539 fs_fd = -1;
2540
2541 if (uname (&buf)) 2602 if (uname (&buf))
2542 return; 2603 return;
2543 2604
2544 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3) 2605 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2545 return; 2606 return;
2546 2607
2547 if (major < 2 2608 if (major < 2
2548 || (major == 2 && minor < 6) 2609 || (major == 2 && minor < 6)
2549 || (major == 2 && minor == 6 && micro < 25)) 2610 || (major == 2 && minor == 6 && micro < 25))
2550 return; 2611 return;
2551 } 2612
2613 fs_2625 = 1;
2614}
2615
2616void inline_size
2617infy_init (EV_P)
2618{
2619 if (fs_fd != -2)
2620 return;
2621
2622 fs_fd = -1;
2623
2624 check_2625 (EV_A);
2552 2625
2553 fs_fd = inotify_init (); 2626 fs_fd = inotify_init ();
2554 2627
2555 if (fs_fd >= 0) 2628 if (fs_fd >= 0)
2556 { 2629 {
2584 w->wd = -1; 2657 w->wd = -1;
2585 2658
2586 if (fs_fd >= 0) 2659 if (fs_fd >= 0)
2587 infy_add (EV_A_ w); /* re-add, no matter what */ 2660 infy_add (EV_A_ w); /* re-add, no matter what */
2588 else 2661 else
2589 ev_timer_start (EV_A_ &w->timer); 2662 ev_timer_again (EV_A_ &w->timer);
2590 } 2663 }
2591 } 2664 }
2592} 2665}
2593 2666
2594#endif 2667#endif
2649ev_stat_start (EV_P_ ev_stat *w) 2722ev_stat_start (EV_P_ ev_stat *w)
2650{ 2723{
2651 if (expect_false (ev_is_active (w))) 2724 if (expect_false (ev_is_active (w)))
2652 return; 2725 return;
2653 2726
2654 /* since we use memcmp, we need to clear any padding data etc. */
2655 memset (&w->prev, 0, sizeof (ev_statdata));
2656 memset (&w->attr, 0, sizeof (ev_statdata));
2657
2658 ev_stat_stat (EV_A_ w); 2727 ev_stat_stat (EV_A_ w);
2659 2728
2729 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2660 if (w->interval < MIN_STAT_INTERVAL) 2730 w->interval = MIN_STAT_INTERVAL;
2661 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2662 2731
2663 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 2732 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2664 ev_set_priority (&w->timer, ev_priority (w)); 2733 ev_set_priority (&w->timer, ev_priority (w));
2665 2734
2666#if EV_USE_INOTIFY 2735#if EV_USE_INOTIFY
2667 infy_init (EV_A); 2736 infy_init (EV_A);
2668 2737
2669 if (fs_fd >= 0) 2738 if (fs_fd >= 0)
2670 infy_add (EV_A_ w); 2739 infy_add (EV_A_ w);
2671 else 2740 else
2672#endif 2741#endif
2673 ev_timer_start (EV_A_ &w->timer); 2742 ev_timer_again (EV_A_ &w->timer);
2674 2743
2675 ev_start (EV_A_ (W)w, 1); 2744 ev_start (EV_A_ (W)w, 1);
2676 2745
2677 EV_FREQUENT_CHECK; 2746 EV_FREQUENT_CHECK;
2678} 2747}
2853static void 2922static void
2854embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 2923embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2855{ 2924{
2856 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 2925 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2857 2926
2927 ev_embed_stop (EV_A_ w);
2928
2858 { 2929 {
2859 struct ev_loop *loop = w->other; 2930 struct ev_loop *loop = w->other;
2860 2931
2861 ev_loop_fork (EV_A); 2932 ev_loop_fork (EV_A);
2933 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2862 } 2934 }
2935
2936 ev_embed_start (EV_A_ w);
2863} 2937}
2864 2938
2865#if 0 2939#if 0
2866static void 2940static void
2867embed_idle_cb (EV_P_ ev_idle *idle, int revents) 2941embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2876 if (expect_false (ev_is_active (w))) 2950 if (expect_false (ev_is_active (w)))
2877 return; 2951 return;
2878 2952
2879 { 2953 {
2880 struct ev_loop *loop = w->other; 2954 struct ev_loop *loop = w->other;
2881 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 2955 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2882 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 2956 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2883 } 2957 }
2884 2958
2885 EV_FREQUENT_CHECK; 2959 EV_FREQUENT_CHECK;
2886 2960
3069 ev_timer_set (&once->to, timeout, 0.); 3143 ev_timer_set (&once->to, timeout, 0.);
3070 ev_timer_start (EV_A_ &once->to); 3144 ev_timer_start (EV_A_ &once->to);
3071 } 3145 }
3072} 3146}
3073 3147
3148/*****************************************************************************/
3149
3150#if 0
3151void
3152ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3153{
3154 int i, j;
3155 ev_watcher_list *wl, *wn;
3156
3157 if (types & (EV_IO | EV_EMBED))
3158 for (i = 0; i < anfdmax; ++i)
3159 for (wl = anfds [i].head; wl; )
3160 {
3161 wn = wl->next;
3162
3163#if EV_EMBED_ENABLE
3164 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3165 {
3166 if (types & EV_EMBED)
3167 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3168 }
3169 else
3170#endif
3171#if EV_USE_INOTIFY
3172 if (ev_cb ((ev_io *)wl) == infy_cb)
3173 ;
3174 else
3175#endif
3176 if ((ev_io *)wl != &pipeev)
3177 if (types & EV_IO)
3178 cb (EV_A_ EV_IO, wl);
3179
3180 wl = wn;
3181 }
3182
3183 if (types & (EV_TIMER | EV_STAT))
3184 for (i = timercnt + HEAP0; i-- > HEAP0; )
3185#if EV_STAT_ENABLE
3186 /*TODO: timer is not always active*/
3187 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3188 {
3189 if (types & EV_STAT)
3190 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3191 }
3192 else
3193#endif
3194 if (types & EV_TIMER)
3195 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3196
3197#if EV_PERIODIC_ENABLE
3198 if (types & EV_PERIODIC)
3199 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3200 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3201#endif
3202
3203#if EV_IDLE_ENABLE
3204 if (types & EV_IDLE)
3205 for (j = NUMPRI; i--; )
3206 for (i = idlecnt [j]; i--; )
3207 cb (EV_A_ EV_IDLE, idles [j][i]);
3208#endif
3209
3210#if EV_FORK_ENABLE
3211 if (types & EV_FORK)
3212 for (i = forkcnt; i--; )
3213 if (ev_cb (forks [i]) != embed_fork_cb)
3214 cb (EV_A_ EV_FORK, forks [i]);
3215#endif
3216
3217#if EV_ASYNC_ENABLE
3218 if (types & EV_ASYNC)
3219 for (i = asynccnt; i--; )
3220 cb (EV_A_ EV_ASYNC, asyncs [i]);
3221#endif
3222
3223 if (types & EV_PREPARE)
3224 for (i = preparecnt; i--; )
3225#if EV_EMBED_ENABLE
3226 if (ev_cb (prepares [i]) != embed_prepare_cb)
3227#endif
3228 cb (EV_A_ EV_PREPARE, prepares [i]);
3229
3230 if (types & EV_CHECK)
3231 for (i = checkcnt; i--; )
3232 cb (EV_A_ EV_CHECK, checks [i]);
3233
3234 if (types & EV_SIGNAL)
3235 for (i = 0; i < signalmax; ++i)
3236 for (wl = signals [i].head; wl; )
3237 {
3238 wn = wl->next;
3239 cb (EV_A_ EV_SIGNAL, wl);
3240 wl = wn;
3241 }
3242
3243 if (types & EV_CHILD)
3244 for (i = EV_PID_HASHSIZE; i--; )
3245 for (wl = childs [i]; wl; )
3246 {
3247 wn = wl->next;
3248 cb (EV_A_ EV_CHILD, wl);
3249 wl = wn;
3250 }
3251/* EV_STAT 0x00001000 /* stat data changed */
3252/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3253}
3254#endif
3255
3074#if EV_MULTIPLICITY 3256#if EV_MULTIPLICITY
3075 #include "ev_wrap.h" 3257 #include "ev_wrap.h"
3076#endif 3258#endif
3077 3259
3078#ifdef __cplusplus 3260#ifdef __cplusplus

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