[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.266 by root, Fri Oct 24 08:15:33 2008 UTC vs.
Revision 1.280 by root, Sat Mar 14 04:45:39 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>
…		…
367	typedef ev_watcher_time *WT;	397	typedef 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 */
		405	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		406	#endif
		407
		408	#if EV_USE_MONOTONIC
375	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	409	static 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"
…		…
388	{	422	{
389	syserr_cb = cb;	423	syserr_cb = cb;
390	}	424	}
391		425
392	static void noinline	426	static void noinline
393	syserr (const char *msg)	427	ev_syserr (const char *msg)
394	{	428	{
395	if (!msg)	429	if (!msg)
396	msg = "(libev) system error";	430	msg = "(libev) system error";
397		431
398	if (syserr_cb)	432	if (syserr_cb)
…		…
450	{	484	{
451	WL head;	485	WL head;
452	unsigned char events;	486	unsigned char events;
453	unsigned char reify;	487	unsigned char reify;
454	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	488	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455	unsigned char unused; /* currently unused padding */	489	unsigned char unused;
		490	#if EV_USE_EPOLL
		491	unsigned int egen; /* generation counter to counter epoll bugs */
		492	#endif
456	#if EV_SELECT_IS_WINSOCKET	493	#if EV_SELECT_IS_WINSOCKET
457	SOCKET handle;	494	SOCKET handle;
458	#endif	495	#endif
459	} ANFD;	496	} ANFD;
460		497
…		…
520		557
521	ev_tstamp	558	ev_tstamp
522	ev_time (void)	559	ev_time (void)
523	{	560	{
524	#if EV_USE_REALTIME	561	#if EV_USE_REALTIME
		562	if (expect_true (have_realtime))
		563	{
525	struct timespec ts;	564	struct timespec ts;
526	clock_gettime (CLOCK_REALTIME, &ts);	565	clock_gettime (CLOCK_REALTIME, &ts);
527	return ts.tv_sec + ts.tv_nsec * 1e-9;	566	return ts.tv_sec + ts.tv_nsec * 1e-9;
528	#else	567	}
		568	#endif
		569
529	struct timeval tv;	570	struct timeval tv;
530	gettimeofday (&tv, 0);	571	gettimeofday (&tv, 0);
531	return tv.tv_sec + tv.tv_usec * 1e-6;	572	return tv.tv_sec + tv.tv_usec * 1e-6;
532	#endif
533	}	573	}
534		574
535	ev_tstamp inline_size	575	ev_tstamp inline_size
536	get_clock (void)	576	get_clock (void)
537	{	577	{
…		…
636	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\	676	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
637	}	677	}
638	#endif	678	#endif
639		679
640	#define array_free(stem, idx) \	680	#define array_free(stem, idx) \
641	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
642		682
643	/*****************************************************************************/	683	/*****************************************************************************/
644		684
645	void noinline	685	void noinline
646	ev_feed_event (EV_P_ void *w, int revents)	686	ev_feed_event (EV_P_ void *w, int revents)
…		…
715	#ifdef EV_FD_TO_WIN32_HANDLE	755	#ifdef EV_FD_TO_WIN32_HANDLE
716	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	756	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717	#else	757	#else
718	anfd->handle = _get_osfhandle (fd);	758	anfd->handle = _get_osfhandle (fd);
719	#endif	759	#endif
720	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));
721	}	761	}
722	#endif	762	#endif
723		763
724	{	764	{
725	unsigned char o_events = anfd->events;	765	unsigned char o_events = anfd->events;
…		…
806		846
807	for (fd = 0; fd < anfdmax; ++fd)	847	for (fd = 0; fd < anfdmax; ++fd)
808	if (anfds [fd].events)	848	if (anfds [fd].events)
809	{	849	{
810	anfds [fd].events = 0;	850	anfds [fd].events = 0;
		851	anfds [fd].emask = 0;
811	fd_change (EV_A_ fd, EV_IOFDSET \| 1);	852	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
812	}	853	}
813	}	854	}
814		855
815	/*****************************************************************************/	856	/*****************************************************************************/
…		…
997	}	1038	}
998	else	1039	else
999	#endif	1040	#endif
1000	{	1041	{
1001	while (pipe (evpipe))	1042	while (pipe (evpipe))
1002	syserr ("(libev) error creating signal/async pipe");	1043	ev_syserr ("(libev) error creating signal/async pipe");
1003		1044
1004	fd_intern (evpipe [0]);	1045	fd_intern (evpipe [0]);
1005	fd_intern (evpipe [1]);	1046	fd_intern (evpipe [1]);
1006	ev_io_set (&pipeev, evpipe [0], EV_READ);	1047	ev_io_set (&pipeev, evpipe [0], EV_READ);
1007	}	1048	}
…		…
1097	ev_feed_signal_event (EV_P_ int signum)	1138	ev_feed_signal_event (EV_P_ int signum)
1098	{	1139	{
1099	WL w;	1140	WL w;
1100		1141
1101	#if EV_MULTIPLICITY	1142	#if EV_MULTIPLICITY
1102	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));
1103	#endif	1144	#endif
1104		1145
1105	--signum;	1146	--signum;
1106		1147
1107	if (signum < 0 \|\| signum >= signalmax)	1148	if (signum < 0 \|\| signum >= signalmax)
…		…
1236	/* kqueue is borked on everything but netbsd apparently */	1277	/* kqueue is borked on everything but netbsd apparently */
1237	/* 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 */
1238	flags &= ~EVBACKEND_KQUEUE;	1279	flags &= ~EVBACKEND_KQUEUE;
1239	#endif	1280	#endif
1240	#ifdef __APPLE__	1281	#ifdef __APPLE__
1241	// flags &= ~EVBACKEND_KQUEUE; for documentation	1282	/* only select works correctly on that "unix-certified" platform */
1242	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 */
1243	#endif	1285	#endif
1244		1286
1245	return flags;	1287	return flags;
1246	}	1288	}
1247		1289
…		…
1284	static void noinline	1326	static void noinline
1285	loop_init (EV_P_ unsigned int flags)	1327	loop_init (EV_P_ unsigned int flags)
1286	{	1328	{
1287	if (!backend)	1329	if (!backend)
1288	{	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
1289	#if EV_USE_MONOTONIC	1341	#if EV_USE_MONOTONIC
		1342	if (!have_monotonic)
1290	{	1343	{
1291	struct timespec ts;	1344	struct timespec ts;
		1345
1292	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1293	have_monotonic = 1;	1347	have_monotonic = 1;
1294	}	1348	}
1295	#endif	1349	#endif
1296		1350
1297	ev_rt_now = ev_time ();	1351	ev_rt_now = ev_time ();
1298	mn_now = get_clock ();	1352	mn_now = get_clock ();
1299	now_floor = mn_now;	1353	now_floor = mn_now;
…		…
1500		1554
1501	#if EV_VERIFY	1555	#if EV_VERIFY
1502	static void noinline	1556	static void noinline
1503	verify_watcher (EV_P_ W w)	1557	verify_watcher (EV_P_ W w)
1504	{	1558	{
1505	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1559	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1506		1560
1507	if (w->pending)	1561	if (w->pending)
1508	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));
1509	}	1563	}
1510		1564
1511	static void noinline	1565	static void noinline
1512	verify_heap (EV_P_ ANHE *heap, int N)	1566	verify_heap (EV_P_ ANHE *heap, int N)
1513	{	1567	{
1514	int i;	1568	int i;
1515		1569
1516	for (i = HEAP0; i < N + HEAP0; ++i)	1570	for (i = HEAP0; i < N + HEAP0; ++i)
1517	{	1571	{
1518	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));
1519	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])));
1520	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]))));
1521		1575
1522	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1576	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1523	}	1577	}
1524	}	1578	}
1525		1579
1526	static void noinline	1580	static void noinline
1527	array_verify (EV_P_ W *ws, int cnt)	1581	array_verify (EV_P_ W *ws, int cnt)
1528	{	1582	{
1529	while (cnt--)	1583	while (cnt--)
1530	{	1584	{
1531	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1585	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1532	verify_watcher (EV_A_ ws [cnt]);	1586	verify_watcher (EV_A_ ws [cnt]);
1533	}	1587	}
1534	}	1588	}
1535	#endif	1589	#endif
1536		1590
…		…
1543		1597
1544	assert (activecnt >= -1);	1598	assert (activecnt >= -1);
1545		1599
1546	assert (fdchangemax >= fdchangecnt);	1600	assert (fdchangemax >= fdchangecnt);
1547	for (i = 0; i < fdchangecnt; ++i)	1601	for (i = 0; i < fdchangecnt; ++i)
1548	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1602	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1549		1603
1550	assert (anfdmax >= 0);	1604	assert (anfdmax >= 0);
1551	for (i = 0; i < anfdmax; ++i)	1605	for (i = 0; i < anfdmax; ++i)
1552	for (w = anfds [i].head; w; w = w->next)	1606	for (w = anfds [i].head; w; w = w->next)
1553	{	1607	{
1554	verify_watcher (EV_A_ (W)w);	1608	verify_watcher (EV_A_ (W)w);
1555	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1609	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1556	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));
1557	}	1611	}
1558		1612
1559	assert (timermax >= timercnt);	1613	assert (timermax >= timercnt);
1560	verify_heap (EV_A_ timers, timercnt);	1614	verify_heap (EV_A_ timers, timercnt);
1561		1615
…		…
1655	{	1709	{
1656	#if EV_MULTIPLICITY	1710	#if EV_MULTIPLICITY
1657	struct ev_loop *loop = ev_default_loop_ptr;	1711	struct ev_loop *loop = ev_default_loop_ptr;
1658	#endif	1712	#endif
1659		1713
1660	if (backend)
1661	postfork = 1; /* must be in line with ev_loop_fork */	1714	postfork = 1; /* must be in line with ev_loop_fork */
1662	}	1715	}
1663		1716
1664	/*****************************************************************************/	1717	/*****************************************************************************/
1665		1718
1666	void	1719	void
…		…
1679	{	1732	{
1680	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1733	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1681		1734
1682	if (expect_true (p->w))	1735	if (expect_true (p->w))
1683	{	1736	{
1684	/assert (("non-pending watcher on pending list", p->w->pending));/	1737	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
1685		1738
1686	p->w->pending = 0;	1739	p->w->pending = 0;
1687	EV_CB_INVOKE (p->w, p->events);	1740	EV_CB_INVOKE (p->w, p->events);
1688	EV_FREQUENT_CHECK;	1741	EV_FREQUENT_CHECK;
1689	}	1742	}
…		…
1720		1773
1721	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1774	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1722	{	1775	{
1723	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);	1776	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);
1724		1777
1725	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/	1778	/assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));/
1726		1779
1727	/* first reschedule or stop timer */	1780	/* first reschedule or stop timer */
1728	if (w->repeat)	1781	if (w->repeat)
1729	{	1782	{
1730	ev_at (w) += w->repeat;	1783	ev_at (w) += w->repeat;
1731	if (ev_at (w) < mn_now)	1784	if (ev_at (w) < mn_now)
1732	ev_at (w) = mn_now;	1785	ev_at (w) = mn_now;
1733		1786
1734	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.));
1735		1788
1736	ANHE_at_cache (timers [HEAP0]);	1789	ANHE_at_cache (timers [HEAP0]);
1737	downheap (timers, timercnt, HEAP0);	1790	downheap (timers, timercnt, HEAP0);
1738	}	1791	}
1739	else	1792	else
…		…
1752		1805
1753	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1806	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1754	{	1807	{
1755	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);	1808	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);
1756		1809
1757	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/	1810	/assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));/
1758		1811
1759	/* first reschedule or stop timer */	1812	/* first reschedule or stop timer */
1760	if (w->reschedule_cb)	1813	if (w->reschedule_cb)
1761	{	1814	{
1762	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1815	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1763		1816
1764	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));
1765		1818
1766	ANHE_at_cache (periodics [HEAP0]);	1819	ANHE_at_cache (periodics [HEAP0]);
1767	downheap (periodics, periodiccnt, HEAP0);	1820	downheap (periodics, periodiccnt, HEAP0);
1768	}	1821	}
1769	else if (w->interval)	1822	else if (w->interval)
…		…
2120	int fd = w->fd;	2173	int fd = w->fd;
2121		2174
2122	if (expect_false (ev_is_active (w)))	2175	if (expect_false (ev_is_active (w)))
2123	return;	2176	return;
2124		2177
2125	assert (("ev_io_start called with negative fd", fd >= 0));	2178	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2126	assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET \| EV_READ \| EV_WRITE))));	2179	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET \| EV_READ \| EV_WRITE))));
2127		2180
2128	EV_FREQUENT_CHECK;	2181	EV_FREQUENT_CHECK;
2129		2182
2130	ev_start (EV_A_ (W)w, 1);	2183	ev_start (EV_A_ (W)w, 1);
2131	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2184	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
…		…
2142	{	2195	{
2143	clear_pending (EV_A_ (W)w);	2196	clear_pending (EV_A_ (W)w);
2144	if (expect_false (!ev_is_active (w)))	2197	if (expect_false (!ev_is_active (w)))
2145	return;	2198	return;
2146		2199
2147	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2200	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2148		2201
2149	EV_FREQUENT_CHECK;	2202	EV_FREQUENT_CHECK;
2150		2203
2151	wlist_del (&anfds[w->fd].head, (WL)w);	2204	wlist_del (&anfds[w->fd].head, (WL)w);
2152	ev_stop (EV_A_ (W)w);	2205	ev_stop (EV_A_ (W)w);
…		…
2162	if (expect_false (ev_is_active (w)))	2215	if (expect_false (ev_is_active (w)))
2163	return;	2216	return;
2164		2217
2165	ev_at (w) += mn_now;	2218	ev_at (w) += mn_now;
2166		2219
2167	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2220	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2168		2221
2169	EV_FREQUENT_CHECK;	2222	EV_FREQUENT_CHECK;
2170		2223
2171	++timercnt;	2224	++timercnt;
2172	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2225	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2175	ANHE_at_cache (timers [ev_active (w)]);	2228	ANHE_at_cache (timers [ev_active (w)]);
2176	upheap (timers, ev_active (w));	2229	upheap (timers, ev_active (w));
2177		2230
2178	EV_FREQUENT_CHECK;	2231	EV_FREQUENT_CHECK;
2179		2232
2180	/assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));/	2233	/assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));/
2181	}	2234	}
2182		2235
2183	void noinline	2236	void noinline
2184	ev_timer_stop (EV_P_ ev_timer *w)	2237	ev_timer_stop (EV_P_ ev_timer *w)
2185	{	2238	{
…		…
2190	EV_FREQUENT_CHECK;	2243	EV_FREQUENT_CHECK;
2191		2244
2192	{	2245	{
2193	int active = ev_active (w);	2246	int active = ev_active (w);
2194		2247
2195	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2248	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2196		2249
2197	--timercnt;	2250	--timercnt;
2198		2251
2199	if (expect_true (active < timercnt + HEAP0))	2252	if (expect_true (active < timercnt + HEAP0))
2200	{	2253	{
…		…
2244		2297
2245	if (w->reschedule_cb)	2298	if (w->reschedule_cb)
2246	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2299	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2247	else if (w->interval)	2300	else if (w->interval)
2248	{	2301	{
2249	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2302	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2250	/* this formula differs from the one in periodic_reify because we do not always round up */	2303	/* this formula differs from the one in periodic_reify because we do not always round up */
2251	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2304	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2252	}	2305	}
2253	else	2306	else
2254	ev_at (w) = w->offset;	2307	ev_at (w) = w->offset;
…		…
2262	ANHE_at_cache (periodics [ev_active (w)]);	2315	ANHE_at_cache (periodics [ev_active (w)]);
2263	upheap (periodics, ev_active (w));	2316	upheap (periodics, ev_active (w));
2264		2317
2265	EV_FREQUENT_CHECK;	2318	EV_FREQUENT_CHECK;
2266		2319
2267	/assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));/	2320	/assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));/
2268	}	2321	}
2269		2322
2270	void noinline	2323	void noinline
2271	ev_periodic_stop (EV_P_ ev_periodic *w)	2324	ev_periodic_stop (EV_P_ ev_periodic *w)
2272	{	2325	{
…		…
2277	EV_FREQUENT_CHECK;	2330	EV_FREQUENT_CHECK;
2278		2331
2279	{	2332	{
2280	int active = ev_active (w);	2333	int active = ev_active (w);
2281		2334
2282	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2335	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2283		2336
2284	--periodiccnt;	2337	--periodiccnt;
2285		2338
2286	if (expect_true (active < periodiccnt + HEAP0))	2339	if (expect_true (active < periodiccnt + HEAP0))
2287	{	2340	{
…		…
2310		2363
2311	void noinline	2364	void noinline
2312	ev_signal_start (EV_P_ ev_signal *w)	2365	ev_signal_start (EV_P_ ev_signal *w)
2313	{	2366	{
2314	#if EV_MULTIPLICITY	2367	#if EV_MULTIPLICITY
2315	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2368	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2316	#endif	2369	#endif
2317	if (expect_false (ev_is_active (w)))	2370	if (expect_false (ev_is_active (w)))
2318	return;	2371	return;
2319		2372
2320	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2373	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2321		2374
2322	evpipe_init (EV_A);	2375	evpipe_init (EV_A);
2323		2376
2324	EV_FREQUENT_CHECK;	2377	EV_FREQUENT_CHECK;
2325		2378
…		…
2376		2429
2377	void	2430	void
2378	ev_child_start (EV_P_ ev_child *w)	2431	ev_child_start (EV_P_ ev_child *w)
2379	{	2432	{
2380	#if EV_MULTIPLICITY	2433	#if EV_MULTIPLICITY
2381	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2434	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2382	#endif	2435	#endif
2383	if (expect_false (ev_is_active (w)))	2436	if (expect_false (ev_is_active (w)))
2384	return;	2437	return;
2385		2438
2386	EV_FREQUENT_CHECK;	2439	EV_FREQUENT_CHECK;
…		…
2411	# ifdef _WIN32	2464	# ifdef _WIN32
2412	# undef lstat	2465	# undef lstat
2413	# define lstat(a,b) _stati64 (a,b)	2466	# define lstat(a,b) _stati64 (a,b)
2414	# endif	2467	# endif
2415		2468
2416	#define DEF_STAT_INTERVAL 5.0074891	2469	#define DEF_STAT_INTERVAL 5.0074891
		2470	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2417	#define MIN_STAT_INTERVAL 0.1074891	2471	#define MIN_STAT_INTERVAL 0.1074891
2418		2472
2419	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2473	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2420		2474
2421	#if EV_USE_INOTIFY	2475	#if EV_USE_INOTIFY
2422	# define EV_INOTIFY_BUFSIZE 8192	2476	# define EV_INOTIFY_BUFSIZE 8192
…		…
2426	{	2480	{
2427	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);	2481	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);
2428		2482
2429	if (w->wd < 0)	2483	if (w->wd < 0)
2430	{	2484	{
		2485	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2431	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2486	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2432		2487
2433	/* monitor some parent directory for speedup hints */	2488	/* monitor some parent directory for speedup hints */
2434	/* note that exceeding the hardcoded limit is not a correctness issue, */	2489	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2435	/* but an efficiency issue only */	2490	/* but an efficiency issue only */
2436	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2491	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
2437	{	2492	{
2438	char path [4096];	2493	char path [4096];
2439	strcpy (path, w->path);	2494	strcpy (path, w->path);
…		…
2443	int mask = IN_MASK_ADD \| IN_DELETE_SELF \| IN_MOVE_SELF	2498	int mask = IN_MASK_ADD \| IN_DELETE_SELF \| IN_MOVE_SELF
2444	\| (errno == EACCES ? IN_ATTRIB : IN_CREATE \| IN_MOVED_TO);	2499	\| (errno == EACCES ? IN_ATTRIB : IN_CREATE \| IN_MOVED_TO);
2445		2500
2446	char *pend = strrchr (path, '/');	2501	char *pend = strrchr (path, '/');
2447		2502
2448	if (!pend)	2503	if (!pend \|\| pend == path)
2449	break; /* whoops, no '/', complain to your admin */	2504	break;
2450		2505
2451	*pend = 0;	2506	*pend = 0;
2452	w->wd = inotify_add_watch (fs_fd, path, mask);	2507	w->wd = inotify_add_watch (fs_fd, path, mask);
2453	}	2508	}
2454	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	2509	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
2455	}	2510	}
2456	}	2511	}
2457	else
2458	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2459		2512
2460	if (w->wd >= 0)	2513	if (w->wd >= 0)
		2514	{
2461	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2515	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2516
		2517	/* now local changes will be tracked by inotify, but remote changes won't */
		2518	/* unless the filesystem it known to be local, we therefore still poll */
		2519	/* also do poll on <2.6.25, but with normal frequency */
		2520	struct statfs sfs;
		2521
		2522	if (fs_2625 && !statfs (w->path, &sfs))
		2523	if (sfs.f_type == 0x1373 /* devfs */
		2524	\|\| sfs.f_type == 0xEF53 /* ext2/3 */
		2525	\|\| sfs.f_type == 0x3153464a /* jfs */
		2526	\|\| sfs.f_type == 0x52654973 /* reiser3 */
		2527	\|\| sfs.f_type == 0x01021994 /* tempfs */
		2528	\|\| sfs.f_type == 0x58465342 /* xfs */)
		2529	return;
		2530
		2531	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2532	ev_timer_again (EV_A_ &w->timer);
		2533	}
2462	}	2534	}
2463		2535
2464	static void noinline	2536	static void noinline
2465	infy_del (EV_P_ ev_stat *w)	2537	infy_del (EV_P_ ev_stat *w)
2466	{	2538	{
…		…
2496		2568
2497	if (w->wd == wd \|\| wd == -1)	2569	if (w->wd == wd \|\| wd == -1)
2498	{	2570	{
2499	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))	2571	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))
2500	{	2572	{
		2573	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2501	w->wd = -1;	2574	w->wd = -1;
2502	infy_add (EV_A_ w); /* re-add, no matter what */	2575	infy_add (EV_A_ w); /* re-add, no matter what */
2503	}	2576	}
2504		2577
2505	stat_timer_cb (EV_A_ &w->timer, 0);	2578	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2519	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2592	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2520	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2593	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2521	}	2594	}
2522		2595
2523	void inline_size	2596	void inline_size
2524	infy_init (EV_P)	2597	check_2625 (EV_P)
2525	{	2598	{
2526	if (fs_fd != -2)
2527	return;
2528
2529	/* kernels < 2.6.25 are borked	2599	/* kernels < 2.6.25 are borked
2530	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2600	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2531	*/	2601	*/
2532	{
2533	struct utsname buf;	2602	struct utsname buf;
2534	int major, minor, micro;	2603	int major, minor, micro;
2535		2604
2536	fs_fd = -1;
2537
2538	if (uname (&buf))	2605	if (uname (&buf))
2539	return;	2606	return;
2540		2607
2541	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2608	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2542	return;	2609	return;
2543		2610
2544	if (major < 2	2611	if (major < 2
2545	\|\| (major == 2 && minor < 6)	2612	\|\| (major == 2 && minor < 6)
2546	\|\| (major == 2 && minor == 6 && micro < 25))	2613	\|\| (major == 2 && minor == 6 && micro < 25))
2547	return;	2614	return;
2548	}	2615
		2616	fs_2625 = 1;
		2617	}
		2618
		2619	void inline_size
		2620	infy_init (EV_P)
		2621	{
		2622	if (fs_fd != -2)
		2623	return;
		2624
		2625	fs_fd = -1;
		2626
		2627	check_2625 (EV_A);
2549		2628
2550	fs_fd = inotify_init ();	2629	fs_fd = inotify_init ();
2551		2630
2552	if (fs_fd >= 0)	2631	if (fs_fd >= 0)
2553	{	2632	{
…		…
2581	w->wd = -1;	2660	w->wd = -1;
2582		2661
2583	if (fs_fd >= 0)	2662	if (fs_fd >= 0)
2584	infy_add (EV_A_ w); /* re-add, no matter what */	2663	infy_add (EV_A_ w); /* re-add, no matter what */
2585	else	2664	else
2586	ev_timer_start (EV_A_ &w->timer);	2665	ev_timer_again (EV_A_ &w->timer);
2587	}	2666	}
2588	}	2667	}
2589	}	2668	}
2590		2669
2591	#endif	2670	#endif
…		…
2646	ev_stat_start (EV_P_ ev_stat *w)	2725	ev_stat_start (EV_P_ ev_stat *w)
2647	{	2726	{
2648	if (expect_false (ev_is_active (w)))	2727	if (expect_false (ev_is_active (w)))
2649	return;	2728	return;
2650		2729
2651	/* since we use memcmp, we need to clear any padding data etc. */
2652	memset (&w->prev, 0, sizeof (ev_statdata));
2653	memset (&w->attr, 0, sizeof (ev_statdata));
2654
2655	ev_stat_stat (EV_A_ w);	2730	ev_stat_stat (EV_A_ w);
2656		2731
		2732	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2657	if (w->interval < MIN_STAT_INTERVAL)	2733	w->interval = MIN_STAT_INTERVAL;
2658	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2659		2734
2660	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2735	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2661	ev_set_priority (&w->timer, ev_priority (w));	2736	ev_set_priority (&w->timer, ev_priority (w));
2662		2737
2663	#if EV_USE_INOTIFY	2738	#if EV_USE_INOTIFY
2664	infy_init (EV_A);	2739	infy_init (EV_A);
2665		2740
2666	if (fs_fd >= 0)	2741	if (fs_fd >= 0)
2667	infy_add (EV_A_ w);	2742	infy_add (EV_A_ w);
2668	else	2743	else
2669	#endif	2744	#endif
2670	ev_timer_start (EV_A_ &w->timer);	2745	ev_timer_again (EV_A_ &w->timer);
2671		2746
2672	ev_start (EV_A_ (W)w, 1);	2747	ev_start (EV_A_ (W)w, 1);
2673		2748
2674	EV_FREQUENT_CHECK;	2749	EV_FREQUENT_CHECK;
2675	}	2750	}
…		…
2850	static void	2925	static void
2851	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	2926	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2852	{	2927	{
2853	ev_embed w = (ev_embed )(((char *)fork_w) - offsetof (ev_embed, fork));	2928	ev_embed w = (ev_embed )(((char *)fork_w) - offsetof (ev_embed, fork));
2854		2929
		2930	ev_embed_stop (EV_A_ w);
		2931
2855	{	2932	{
2856	struct ev_loop *loop = w->other;	2933	struct ev_loop *loop = w->other;
2857		2934
2858	ev_loop_fork (EV_A);	2935	ev_loop_fork (EV_A);
		2936	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2859	}	2937	}
		2938
		2939	ev_embed_start (EV_A_ w);
2860	}	2940	}
2861		2941
2862	#if 0	2942	#if 0
2863	static void	2943	static void
2864	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	2944	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2873	if (expect_false (ev_is_active (w)))	2953	if (expect_false (ev_is_active (w)))
2874	return;	2954	return;
2875		2955
2876	{	2956	{
2877	struct ev_loop *loop = w->other;	2957	struct ev_loop *loop = w->other;
2878	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2958	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2879	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	2959	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2880	}	2960	}
2881		2961
2882	EV_FREQUENT_CHECK;	2962	EV_FREQUENT_CHECK;
2883		2963

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Comparing libev/ev.c (file contents): Revision 1.266 by root, Fri Oct 24 08:15:33 2008 UTC vs. Revision 1.280 by root, Sat Mar 14 04:45:39 2009 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.266 by root, Fri Oct 24 08:15:33 2008 UTC vs.
Revision 1.280 by root, Sat Mar 14 04:45:39 2009 UTC