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

Comparing libev/ev.c (file contents):
Revision 1.271 by root, Mon Nov 3 12:13:15 2008 UTC vs.
Revision 1.278 by root, Tue Jan 6 19:46:56 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
…		…
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
…		…
300		320
301	#if EV_SELECT_IS_WINSOCKET	321	#if EV_SELECT_IS_WINSOCKET
302	# include <winsock.h>	322	# include <winsock.h>
303	#endif	323	#endif
304		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
		332	#endif
		333
305	#if EV_USE_EVENTFD	334	#if EV_USE_EVENTFD
306	/* 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 */
307	# include <stdint.h>	336	# include <stdint.h>
308	# ifdef __cplusplus	337	# ifdef __cplusplus
309	extern "C" {	338	extern "C" {
…		…
719	#ifdef EV_FD_TO_WIN32_HANDLE	748	#ifdef EV_FD_TO_WIN32_HANDLE
720	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	749	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
721	#else	750	#else
722	anfd->handle = _get_osfhandle (fd);	751	anfd->handle = _get_osfhandle (fd);
723	#endif	752	#endif
724	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	753	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
725	}	754	}
726	#endif	755	#endif
727		756
728	{	757	{
729	unsigned char o_events = anfd->events;	758	unsigned char o_events = anfd->events;
…		…
1102	ev_feed_signal_event (EV_P_ int signum)	1131	ev_feed_signal_event (EV_P_ int signum)
1103	{	1132	{
1104	WL w;	1133	WL w;
1105		1134
1106	#if EV_MULTIPLICITY	1135	#if EV_MULTIPLICITY
1107	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1136	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1108	#endif	1137	#endif
1109		1138
1110	--signum;	1139	--signum;
1111		1140
1112	if (signum < 0 \|\| signum >= signalmax)	1141	if (signum < 0 \|\| signum >= signalmax)
…		…
1241	/* kqueue is borked on everything but netbsd apparently */	1270	/* kqueue is borked on everything but netbsd apparently */
1242	/* it usually doesn't work correctly on anything but sockets and pipes */	1271	/* it usually doesn't work correctly on anything but sockets and pipes */
1243	flags &= ~EVBACKEND_KQUEUE;	1272	flags &= ~EVBACKEND_KQUEUE;
1244	#endif	1273	#endif
1245	#ifdef __APPLE__	1274	#ifdef __APPLE__
1246	// flags &= ~EVBACKEND_KQUEUE; for documentation	1275	/* only select works correctly on that "unix-certified" platform */
1247	flags &= ~EVBACKEND_POLL;	1276	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1277	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1248	#endif	1278	#endif
1249		1279
1250	return flags;	1280	return flags;
1251	}	1281	}
1252		1282
…		…
1505		1535
1506	#if EV_VERIFY	1536	#if EV_VERIFY
1507	static void noinline	1537	static void noinline
1508	verify_watcher (EV_P_ W w)	1538	verify_watcher (EV_P_ W w)
1509	{	1539	{
1510	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1540	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1511		1541
1512	if (w->pending)	1542	if (w->pending)
1513	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	1543	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1514	}	1544	}
1515		1545
1516	static void noinline	1546	static void noinline
1517	verify_heap (EV_P_ ANHE *heap, int N)	1547	verify_heap (EV_P_ ANHE *heap, int N)
1518	{	1548	{
1519	int i;	1549	int i;
1520		1550
1521	for (i = HEAP0; i < N + HEAP0; ++i)	1551	for (i = HEAP0; i < N + HEAP0; ++i)
1522	{	1552	{
1523	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));	1553	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1524	assert (("heap condition violated", i == HEAP0 \|\| ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));	1554	assert (("libev: heap condition violated", i == HEAP0 \|\| ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1525	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));	1555	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1526		1556
1527	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1557	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1528	}	1558	}
1529	}	1559	}
1530		1560
1531	static void noinline	1561	static void noinline
1532	array_verify (EV_P_ W *ws, int cnt)	1562	array_verify (EV_P_ W *ws, int cnt)
1533	{	1563	{
1534	while (cnt--)	1564	while (cnt--)
1535	{	1565	{
1536	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1566	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1537	verify_watcher (EV_A_ ws [cnt]);	1567	verify_watcher (EV_A_ ws [cnt]);
1538	}	1568	}
1539	}	1569	}
1540	#endif	1570	#endif
1541		1571
…		…
1548		1578
1549	assert (activecnt >= -1);	1579	assert (activecnt >= -1);
1550		1580
1551	assert (fdchangemax >= fdchangecnt);	1581	assert (fdchangemax >= fdchangecnt);
1552	for (i = 0; i < fdchangecnt; ++i)	1582	for (i = 0; i < fdchangecnt; ++i)
1553	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1583	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1554		1584
1555	assert (anfdmax >= 0);	1585	assert (anfdmax >= 0);
1556	for (i = 0; i < anfdmax; ++i)	1586	for (i = 0; i < anfdmax; ++i)
1557	for (w = anfds [i].head; w; w = w->next)	1587	for (w = anfds [i].head; w; w = w->next)
1558	{	1588	{
1559	verify_watcher (EV_A_ (W)w);	1589	verify_watcher (EV_A_ (W)w);
1560	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1590	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1561	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));	1591	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1562	}	1592	}
1563		1593
1564	assert (timermax >= timercnt);	1594	assert (timermax >= timercnt);
1565	verify_heap (EV_A_ timers, timercnt);	1595	verify_heap (EV_A_ timers, timercnt);
1566		1596
…		…
1683	{	1713	{
1684	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1714	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1685		1715
1686	if (expect_true (p->w))	1716	if (expect_true (p->w))
1687	{	1717	{
1688	/assert (("non-pending watcher on pending list", p->w->pending));/	1718	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
1689		1719
1690	p->w->pending = 0;	1720	p->w->pending = 0;
1691	EV_CB_INVOKE (p->w, p->events);	1721	EV_CB_INVOKE (p->w, p->events);
1692	EV_FREQUENT_CHECK;	1722	EV_FREQUENT_CHECK;
1693	}	1723	}
…		…
1724		1754
1725	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1755	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1726	{	1756	{
1727	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);	1757	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);
1728		1758
1729	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/	1759	/assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));/
1730		1760
1731	/* first reschedule or stop timer */	1761	/* first reschedule or stop timer */
1732	if (w->repeat)	1762	if (w->repeat)
1733	{	1763	{
1734	ev_at (w) += w->repeat;	1764	ev_at (w) += w->repeat;
1735	if (ev_at (w) < mn_now)	1765	if (ev_at (w) < mn_now)
1736	ev_at (w) = mn_now;	1766	ev_at (w) = mn_now;
1737		1767
1738	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1768	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1739		1769
1740	ANHE_at_cache (timers [HEAP0]);	1770	ANHE_at_cache (timers [HEAP0]);
1741	downheap (timers, timercnt, HEAP0);	1771	downheap (timers, timercnt, HEAP0);
1742	}	1772	}
1743	else	1773	else
…		…
1756		1786
1757	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1787	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1758	{	1788	{
1759	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);	1789	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);
1760		1790
1761	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/	1791	/assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));/
1762		1792
1763	/* first reschedule or stop timer */	1793	/* first reschedule or stop timer */
1764	if (w->reschedule_cb)	1794	if (w->reschedule_cb)
1765	{	1795	{
1766	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1796	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1767		1797
1768	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1798	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1769		1799
1770	ANHE_at_cache (periodics [HEAP0]);	1800	ANHE_at_cache (periodics [HEAP0]);
1771	downheap (periodics, periodiccnt, HEAP0);	1801	downheap (periodics, periodiccnt, HEAP0);
1772	}	1802	}
1773	else if (w->interval)	1803	else if (w->interval)
…		…
2124	int fd = w->fd;	2154	int fd = w->fd;
2125		2155
2126	if (expect_false (ev_is_active (w)))	2156	if (expect_false (ev_is_active (w)))
2127	return;	2157	return;
2128		2158
2129	assert (("ev_io_start called with negative fd", fd >= 0));	2159	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2130	assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET \| EV_READ \| EV_WRITE))));	2160	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET \| EV_READ \| EV_WRITE))));
2131		2161
2132	EV_FREQUENT_CHECK;	2162	EV_FREQUENT_CHECK;
2133		2163
2134	ev_start (EV_A_ (W)w, 1);	2164	ev_start (EV_A_ (W)w, 1);
2135	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2165	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
…		…
2146	{	2176	{
2147	clear_pending (EV_A_ (W)w);	2177	clear_pending (EV_A_ (W)w);
2148	if (expect_false (!ev_is_active (w)))	2178	if (expect_false (!ev_is_active (w)))
2149	return;	2179	return;
2150		2180
2151	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2181	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2152		2182
2153	EV_FREQUENT_CHECK;	2183	EV_FREQUENT_CHECK;
2154		2184
2155	wlist_del (&anfds[w->fd].head, (WL)w);	2185	wlist_del (&anfds[w->fd].head, (WL)w);
2156	ev_stop (EV_A_ (W)w);	2186	ev_stop (EV_A_ (W)w);
…		…
2166	if (expect_false (ev_is_active (w)))	2196	if (expect_false (ev_is_active (w)))
2167	return;	2197	return;
2168		2198
2169	ev_at (w) += mn_now;	2199	ev_at (w) += mn_now;
2170		2200
2171	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2201	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2172		2202
2173	EV_FREQUENT_CHECK;	2203	EV_FREQUENT_CHECK;
2174		2204
2175	++timercnt;	2205	++timercnt;
2176	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2206	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2179	ANHE_at_cache (timers [ev_active (w)]);	2209	ANHE_at_cache (timers [ev_active (w)]);
2180	upheap (timers, ev_active (w));	2210	upheap (timers, ev_active (w));
2181		2211
2182	EV_FREQUENT_CHECK;	2212	EV_FREQUENT_CHECK;
2183		2213
2184	/assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));/	2214	/assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));/
2185	}	2215	}
2186		2216
2187	void noinline	2217	void noinline
2188	ev_timer_stop (EV_P_ ev_timer *w)	2218	ev_timer_stop (EV_P_ ev_timer *w)
2189	{	2219	{
…		…
2194	EV_FREQUENT_CHECK;	2224	EV_FREQUENT_CHECK;
2195		2225
2196	{	2226	{
2197	int active = ev_active (w);	2227	int active = ev_active (w);
2198		2228
2199	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2229	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2200		2230
2201	--timercnt;	2231	--timercnt;
2202		2232
2203	if (expect_true (active < timercnt + HEAP0))	2233	if (expect_true (active < timercnt + HEAP0))
2204	{	2234	{
…		…
2248		2278
2249	if (w->reschedule_cb)	2279	if (w->reschedule_cb)
2250	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2280	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2251	else if (w->interval)	2281	else if (w->interval)
2252	{	2282	{
2253	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2283	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2254	/* this formula differs from the one in periodic_reify because we do not always round up */	2284	/* this formula differs from the one in periodic_reify because we do not always round up */
2255	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2285	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2256	}	2286	}
2257	else	2287	else
2258	ev_at (w) = w->offset;	2288	ev_at (w) = w->offset;
…		…
2266	ANHE_at_cache (periodics [ev_active (w)]);	2296	ANHE_at_cache (periodics [ev_active (w)]);
2267	upheap (periodics, ev_active (w));	2297	upheap (periodics, ev_active (w));
2268		2298
2269	EV_FREQUENT_CHECK;	2299	EV_FREQUENT_CHECK;
2270		2300
2271	/assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));/	2301	/assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));/
2272	}	2302	}
2273		2303
2274	void noinline	2304	void noinline
2275	ev_periodic_stop (EV_P_ ev_periodic *w)	2305	ev_periodic_stop (EV_P_ ev_periodic *w)
2276	{	2306	{
…		…
2281	EV_FREQUENT_CHECK;	2311	EV_FREQUENT_CHECK;
2282		2312
2283	{	2313	{
2284	int active = ev_active (w);	2314	int active = ev_active (w);
2285		2315
2286	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2316	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2287		2317
2288	--periodiccnt;	2318	--periodiccnt;
2289		2319
2290	if (expect_true (active < periodiccnt + HEAP0))	2320	if (expect_true (active < periodiccnt + HEAP0))
2291	{	2321	{
…		…
2314		2344
2315	void noinline	2345	void noinline
2316	ev_signal_start (EV_P_ ev_signal *w)	2346	ev_signal_start (EV_P_ ev_signal *w)
2317	{	2347	{
2318	#if EV_MULTIPLICITY	2348	#if EV_MULTIPLICITY
2319	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2349	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2320	#endif	2350	#endif
2321	if (expect_false (ev_is_active (w)))	2351	if (expect_false (ev_is_active (w)))
2322	return;	2352	return;
2323		2353
2324	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2354	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2325		2355
2326	evpipe_init (EV_A);	2356	evpipe_init (EV_A);
2327		2357
2328	EV_FREQUENT_CHECK;	2358	EV_FREQUENT_CHECK;
2329		2359
…		…
2380		2410
2381	void	2411	void
2382	ev_child_start (EV_P_ ev_child *w)	2412	ev_child_start (EV_P_ ev_child *w)
2383	{	2413	{
2384	#if EV_MULTIPLICITY	2414	#if EV_MULTIPLICITY
2385	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2415	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2386	#endif	2416	#endif
2387	if (expect_false (ev_is_active (w)))	2417	if (expect_false (ev_is_active (w)))
2388	return;	2418	return;
2389		2419
2390	EV_FREQUENT_CHECK;	2420	EV_FREQUENT_CHECK;
…		…
2415	# ifdef _WIN32	2445	# ifdef _WIN32
2416	# undef lstat	2446	# undef lstat
2417	# define lstat(a,b) _stati64 (a,b)	2447	# define lstat(a,b) _stati64 (a,b)
2418	# endif	2448	# endif
2419		2449
2420	#define DEF_STAT_INTERVAL 5.0074891	2450	#define DEF_STAT_INTERVAL 5.0074891
		2451	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2421	#define MIN_STAT_INTERVAL 0.1074891	2452	#define MIN_STAT_INTERVAL 0.1074891
2422		2453
2423	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2454	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2424		2455
2425	#if EV_USE_INOTIFY	2456	#if EV_USE_INOTIFY
2426	# define EV_INOTIFY_BUFSIZE 8192	2457	# define EV_INOTIFY_BUFSIZE 8192
…		…
2430	{	2461	{
2431	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);	2462	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);
2432		2463
2433	if (w->wd < 0)	2464	if (w->wd < 0)
2434	{	2465	{
		2466	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2435	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2467	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2436		2468
2437	/* monitor some parent directory for speedup hints */	2469	/* monitor some parent directory for speedup hints */
2438	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2470	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2439	/* but an efficiency issue only */	2471	/* but an efficiency issue only */
2440	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2472	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
…		…
2447	int mask = IN_MASK_ADD \| IN_DELETE_SELF \| IN_MOVE_SELF	2479	int mask = IN_MASK_ADD \| IN_DELETE_SELF \| IN_MOVE_SELF
2448	\| (errno == EACCES ? IN_ATTRIB : IN_CREATE \| IN_MOVED_TO);	2480	\| (errno == EACCES ? IN_ATTRIB : IN_CREATE \| IN_MOVED_TO);
2449		2481
2450	char *pend = strrchr (path, '/');	2482	char *pend = strrchr (path, '/');
2451		2483
2452	if (!pend)	2484	if (!pend \|\| pend == path)
2453	break; /* whoops, no '/', complain to your admin */	2485	break;
2454		2486
2455	*pend = 0;	2487	*pend = 0;
2456	w->wd = inotify_add_watch (fs_fd, path, mask);	2488	w->wd = inotify_add_watch (fs_fd, path, mask);
2457	}	2489	}
2458	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	2490	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
2459	}	2491	}
2460	}	2492	}
2461	else
2462	todo, on nfs etc., we need to poll every 60s or so
2463	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2464		2493
2465	if (w->wd >= 0)	2494	if (w->wd >= 0)
		2495	{
2466	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2496	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2497
		2498	/* now local changes will be tracked by inotify, but remote changes won't */
		2499	/* unless the filesystem it known to be local, we therefore still poll */
		2500	/* also do poll on <2.6.25, but with normal frequency */
		2501	struct statfs sfs;
		2502
		2503	if (fs_2625 && !statfs (w->path, &sfs))
		2504	if (sfs.f_type == 0x1373 /* devfs */
		2505	\|\| sfs.f_type == 0xEF53 /* ext2/3 */
		2506	\|\| sfs.f_type == 0x3153464a /* jfs */
		2507	\|\| sfs.f_type == 0x52654973 /* reiser3 */
		2508	\|\| sfs.f_type == 0x01021994 /* tempfs */
		2509	\|\| sfs.f_type == 0x58465342 /* xfs */)
		2510	return;
		2511
		2512	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2513	ev_timer_again (EV_A_ &w->timer);
		2514	}
2467	}	2515	}
2468		2516
2469	static void noinline	2517	static void noinline
2470	infy_del (EV_P_ ev_stat *w)	2518	infy_del (EV_P_ ev_stat *w)
2471	{	2519	{
…		…
2501		2549
2502	if (w->wd == wd \|\| wd == -1)	2550	if (w->wd == wd \|\| wd == -1)
2503	{	2551	{
2504	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))	2552	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))
2505	{	2553	{
		2554	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2506	w->wd = -1;	2555	w->wd = -1;
2507	infy_add (EV_A_ w); /* re-add, no matter what */	2556	infy_add (EV_A_ w); /* re-add, no matter what */
2508	}	2557	}
2509		2558
2510	stat_timer_cb (EV_A_ &w->timer, 0);	2559	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2524	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2573	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2525	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2574	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2526	}	2575	}
2527		2576
2528	void inline_size	2577	void inline_size
2529	infy_init (EV_P)	2578	check_2625 (EV_P)
2530	{	2579	{
2531	if (fs_fd != -2)
2532	return;
2533
2534	/* kernels < 2.6.25 are borked	2580	/* kernels < 2.6.25 are borked
2535	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2581	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2536	*/	2582	*/
2537	{
2538	struct utsname buf;	2583	struct utsname buf;
2539	int major, minor, micro;	2584	int major, minor, micro;
2540		2585
2541	fs_fd = -1;
2542
2543	if (uname (&buf))	2586	if (uname (&buf))
2544	return;	2587	return;
2545		2588
2546	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2589	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2547	return;	2590	return;
2548		2591
2549	if (major < 2	2592	if (major < 2
2550	\|\| (major == 2 && minor < 6)	2593	\|\| (major == 2 && minor < 6)
2551	\|\| (major == 2 && minor == 6 && micro < 25))	2594	\|\| (major == 2 && minor == 6 && micro < 25))
2552	return;	2595	return;
2553	}	2596
		2597	fs_2625 = 1;
		2598	}
		2599
		2600	void inline_size
		2601	infy_init (EV_P)
		2602	{
		2603	if (fs_fd != -2)
		2604	return;
		2605
		2606	fs_fd = -1;
		2607
		2608	check_2625 (EV_A);
2554		2609
2555	fs_fd = inotify_init ();	2610	fs_fd = inotify_init ();
2556		2611
2557	if (fs_fd >= 0)	2612	if (fs_fd >= 0)
2558	{	2613	{
…		…
2586	w->wd = -1;	2641	w->wd = -1;
2587		2642
2588	if (fs_fd >= 0)	2643	if (fs_fd >= 0)
2589	infy_add (EV_A_ w); /* re-add, no matter what */	2644	infy_add (EV_A_ w); /* re-add, no matter what */
2590	else	2645	else
2591	ev_timer_start (EV_A_ &w->timer);	2646	ev_timer_again (EV_A_ &w->timer);
2592	}	2647	}
2593	}	2648	}
2594	}	2649	}
2595		2650
2596	#endif	2651	#endif
…		…
2651	ev_stat_start (EV_P_ ev_stat *w)	2706	ev_stat_start (EV_P_ ev_stat *w)
2652	{	2707	{
2653	if (expect_false (ev_is_active (w)))	2708	if (expect_false (ev_is_active (w)))
2654	return;	2709	return;
2655		2710
2656	/* since we use memcmp, we need to clear any padding data etc. */
2657	memset (&w->prev, 0, sizeof (ev_statdata));
2658	memset (&w->attr, 0, sizeof (ev_statdata));
2659
2660	ev_stat_stat (EV_A_ w);	2711	ev_stat_stat (EV_A_ w);
2661		2712
		2713	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2662	if (w->interval < MIN_STAT_INTERVAL)	2714	w->interval = MIN_STAT_INTERVAL;
2663	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2664		2715
2665	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2716	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2666	ev_set_priority (&w->timer, ev_priority (w));	2717	ev_set_priority (&w->timer, ev_priority (w));
2667		2718
2668	#if EV_USE_INOTIFY	2719	#if EV_USE_INOTIFY
2669	infy_init (EV_A);	2720	infy_init (EV_A);
2670		2721
2671	if (fs_fd >= 0)	2722	if (fs_fd >= 0)
2672	infy_add (EV_A_ w);	2723	infy_add (EV_A_ w);
2673	else	2724	else
2674	#endif	2725	#endif
2675	ev_timer_start (EV_A_ &w->timer);	2726	ev_timer_again (EV_A_ &w->timer);
2676		2727
2677	ev_start (EV_A_ (W)w, 1);	2728	ev_start (EV_A_ (W)w, 1);
2678		2729
2679	EV_FREQUENT_CHECK;	2730	EV_FREQUENT_CHECK;
2680	}	2731	}
…		…
2855	static void	2906	static void
2856	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	2907	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2857	{	2908	{
2858	ev_embed w = (ev_embed )(((char *)fork_w) - offsetof (ev_embed, fork));	2909	ev_embed w = (ev_embed )(((char *)fork_w) - offsetof (ev_embed, fork));
2859		2910
		2911	ev_embed_stop (EV_A_ w);
		2912
2860	{	2913	{
2861	struct ev_loop *loop = w->other;	2914	struct ev_loop *loop = w->other;
2862		2915
2863	ev_loop_fork (EV_A);	2916	ev_loop_fork (EV_A);
		2917	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2864	}	2918	}
		2919
		2920	ev_embed_start (EV_A_ w);
2865	}	2921	}
2866		2922
2867	#if 0	2923	#if 0
2868	static void	2924	static void
2869	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	2925	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2878	if (expect_false (ev_is_active (w)))	2934	if (expect_false (ev_is_active (w)))
2879	return;	2935	return;
2880		2936
2881	{	2937	{
2882	struct ev_loop *loop = w->other;	2938	struct ev_loop *loop = w->other;
2883	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2939	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2884	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	2940	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2885	}	2941	}
2886		2942
2887	EV_FREQUENT_CHECK;	2943	EV_FREQUENT_CHECK;
2888		2944

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Comparing libev/ev.c (file contents): Revision 1.271 by root, Mon Nov 3 12:13:15 2008 UTC vs. Revision 1.278 by root, Tue Jan 6 19:46:56 2009 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.271 by root, Mon Nov 3 12:13:15 2008 UTC vs.
Revision 1.278 by root, Tue Jan 6 19:46:56 2009 UTC