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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 1.293 by root, Mon Jun 29 18:46:52 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	# elif !defined(EV_USE_CLOCK_SYSCALL)
		63	# define EV_USE_CLOCK_SYSCALL 0
		64	# endif
		65
52	# if HAVE_CLOCK_GETTIME	66	# if HAVE_CLOCK_GETTIME
53	# ifndef EV_USE_MONOTONIC	67	# ifndef EV_USE_MONOTONIC
54	# define EV_USE_MONOTONIC 1	68	# define EV_USE_MONOTONIC 1
55	# endif	69	# endif
56	# ifndef EV_USE_REALTIME	70	# ifndef EV_USE_REALTIME
57	# define EV_USE_REALTIME 1	71	# define EV_USE_REALTIME 0
58	# endif	72	# endif
59	# else	73	# else
60	# ifndef EV_USE_MONOTONIC	74	# ifndef EV_USE_MONOTONIC
61	# define EV_USE_MONOTONIC 0	75	# define EV_USE_MONOTONIC 0
62	# endif	76	# endif
…		…
164	# endif	178	# endif
165	#endif	179	#endif
166		180
167	/* this block tries to deduce configuration from header-defined symbols and defaults */	181	/* this block tries to deduce configuration from header-defined symbols and defaults */
168		182
		183	#ifndef EV_USE_CLOCK_SYSCALL
		184	# if __linux && __GLIBC__ >= 2
		185	# define EV_USE_CLOCK_SYSCALL 1
		186	# else
		187	# define EV_USE_CLOCK_SYSCALL 0
		188	# endif
		189	#endif
		190
169	#ifndef EV_USE_MONOTONIC	191	#ifndef EV_USE_MONOTONIC
170	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0	192	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171	# define EV_USE_MONOTONIC 1	193	# define EV_USE_MONOTONIC 1
172	# else	194	# else
173	# define EV_USE_MONOTONIC 0	195	# define EV_USE_MONOTONIC 0
174	# endif	196	# endif
175	#endif	197	#endif
176		198
177	#ifndef EV_USE_REALTIME	199	#ifndef EV_USE_REALTIME
178	# define EV_USE_REALTIME 0	200	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
179	#endif	201	#endif
180		202
181	#ifndef EV_USE_NANOSLEEP	203	#ifndef EV_USE_NANOSLEEP
182	# if _POSIX_C_SOURCE >= 199309L	204	# if _POSIX_C_SOURCE >= 199309L
183	# define EV_USE_NANOSLEEP 1	205	# define EV_USE_NANOSLEEP 1
…		…
262		284
263	#ifndef EV_HEAP_CACHE_AT	285	#ifndef EV_HEAP_CACHE_AT
264	# define EV_HEAP_CACHE_AT !EV_MINIMAL	286	# define EV_HEAP_CACHE_AT !EV_MINIMAL
265	#endif	287	#endif
266		288
		289	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		290	/* which makes programs even slower. might work on other unices, too. */
		291	#if EV_USE_CLOCK_SYSCALL
		292	# include <syscall.h>
		293	# ifdef SYS_clock_gettime
		294	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		295	# undef EV_USE_MONOTONIC
		296	# define EV_USE_MONOTONIC 1
		297	# else
		298	# undef EV_USE_CLOCK_SYSCALL
		299	# define EV_USE_CLOCK_SYSCALL 0
		300	# endif
		301	#endif
		302
267	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	303	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
268		304
269	#ifndef CLOCK_MONOTONIC	305	#ifndef CLOCK_MONOTONIC
270	# undef EV_USE_MONOTONIC	306	# undef EV_USE_MONOTONIC
271	# define EV_USE_MONOTONIC 0	307	# define EV_USE_MONOTONIC 0
…		…
287	# endif	323	# endif
288	#endif	324	#endif
289		325
290	#if EV_USE_INOTIFY	326	#if EV_USE_INOTIFY
291	# include <sys/utsname.h>	327	# include <sys/utsname.h>
		328	# include <sys/statfs.h>
292	# include <sys/inotify.h>	329	# include <sys/inotify.h>
293	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */	330	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294	# ifndef IN_DONT_FOLLOW	331	# ifndef IN_DONT_FOLLOW
295	# undef EV_USE_INOTIFY	332	# undef EV_USE_INOTIFY
296	# define EV_USE_INOTIFY 0	333	# define EV_USE_INOTIFY 0
…		…
367	typedef ev_watcher_time *WT;	404	typedef ev_watcher_time *WT;
368		405
369	#define ev_active(w) ((W)(w))->active	406	#define ev_active(w) ((W)(w))->active
370	#define ev_at(w) ((WT)(w))->at	407	#define ev_at(w) ((WT)(w))->at
371		408
372	#if EV_USE_MONOTONIC	409	#if EV_USE_REALTIME
373	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	410	/* 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 */	411	/* giving it a reasonably high chance of working on typical architetcures */
		412	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		413	#endif
		414
		415	#if EV_USE_MONOTONIC
375	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	416	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376	#endif	417	#endif
377		418
378	#ifdef _WIN32	419	#ifdef _WIN32
379	# include "ev_win32.c"	420	# include "ev_win32.c"
…		…
444	#define ev_malloc(size) ev_realloc (0, (size))	485	#define ev_malloc(size) ev_realloc (0, (size))
445	#define ev_free(ptr) ev_realloc ((ptr), 0)	486	#define ev_free(ptr) ev_realloc ((ptr), 0)
446		487
447	/*****************************************************************************/	488	/*****************************************************************************/
448		489
		490	/* file descriptor info structure */
449	typedef struct	491	typedef struct
450	{	492	{
451	WL head;	493	WL head;
452	unsigned char events;	494	unsigned char events; /* the events watched for */
453	unsigned char reify;	495	unsigned char reify; /* flag set when this ANFD needs reification */
454	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	496	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455	unsigned char unused;	497	unsigned char unused;
456	#if EV_USE_EPOLL	498	#if EV_USE_EPOLL
457	unsigned int egen; /* generation counter to counter epoll bugs */	499	unsigned int egen; /* generation counter to counter epoll bugs */
458	#endif	500	#endif
459	#if EV_SELECT_IS_WINSOCKET	501	#if EV_SELECT_IS_WINSOCKET
460	SOCKET handle;	502	SOCKET handle;
461	#endif	503	#endif
462	} ANFD;	504	} ANFD;
463		505
		506	/* stores the pending event set for a given watcher */
464	typedef struct	507	typedef struct
465	{	508	{
466	W w;	509	W w;
467	int events;	510	int events; /* the pending event set for the given watcher */
468	} ANPENDING;	511	} ANPENDING;
469		512
470	#if EV_USE_INOTIFY	513	#if EV_USE_INOTIFY
471	/* hash table entry per inotify-id */	514	/* hash table entry per inotify-id */
472	typedef struct	515	typedef struct
…		…
475	} ANFS;	518	} ANFS;
476	#endif	519	#endif
477		520
478	/* Heap Entry */	521	/* Heap Entry */
479	#if EV_HEAP_CACHE_AT	522	#if EV_HEAP_CACHE_AT
		523	/* a heap element */
480	typedef struct {	524	typedef struct {
481	ev_tstamp at;	525	ev_tstamp at;
482	WT w;	526	WT w;
483	} ANHE;	527	} ANHE;
484		528
485	#define ANHE_w(he) (he).w /* access watcher, read-write */	529	#define ANHE_w(he) (he).w /* access watcher, read-write */
486	#define ANHE_at(he) (he).at /* access cached at, read-only */	530	#define ANHE_at(he) (he).at /* access cached at, read-only */
487	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */	531	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
488	#else	532	#else
		533	/* a heap element */
489	typedef WT ANHE;	534	typedef WT ANHE;
490		535
491	#define ANHE_w(he) (he)	536	#define ANHE_w(he) (he)
492	#define ANHE_at(he) (he)->at	537	#define ANHE_at(he) (he)->at
493	#define ANHE_at_cache(he)	538	#define ANHE_at_cache(he)
…		…
519		564
520	#endif	565	#endif
521		566
522	/*****************************************************************************/	567	/*****************************************************************************/
523		568
		569	#ifndef EV_HAVE_EV_TIME
524	ev_tstamp	570	ev_tstamp
525	ev_time (void)	571	ev_time (void)
526	{	572	{
527	#if EV_USE_REALTIME	573	#if EV_USE_REALTIME
		574	if (expect_true (have_realtime))
		575	{
528	struct timespec ts;	576	struct timespec ts;
529	clock_gettime (CLOCK_REALTIME, &ts);	577	clock_gettime (CLOCK_REALTIME, &ts);
530	return ts.tv_sec + ts.tv_nsec * 1e-9;	578	return ts.tv_sec + ts.tv_nsec * 1e-9;
531	#else	579	}
		580	#endif
		581
532	struct timeval tv;	582	struct timeval tv;
533	gettimeofday (&tv, 0);	583	gettimeofday (&tv, 0);
534	return tv.tv_sec + tv.tv_usec * 1e-6;	584	return tv.tv_sec + tv.tv_usec * 1e-6;
535	#endif
536	}	585	}
		586	#endif
537		587
538	ev_tstamp inline_size	588	inline_size ev_tstamp
539	get_clock (void)	589	get_clock (void)
540	{	590	{
541	#if EV_USE_MONOTONIC	591	#if EV_USE_MONOTONIC
542	if (expect_true (have_monotonic))	592	if (expect_true (have_monotonic))
543	{	593	{
…		…
577		627
578	tv.tv_sec = (time_t)delay;	628	tv.tv_sec = (time_t)delay;
579	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	629	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
580		630
581	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	631	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
582	/* somehting nto guaranteed by newer posix versions, but guaranteed */	632	/* somehting not guaranteed by newer posix versions, but guaranteed */
583	/* by older ones */	633	/* by older ones */
584	select (0, 0, 0, 0, &tv);	634	select (0, 0, 0, 0, &tv);
585	#endif	635	#endif
586	}	636	}
587	}	637	}
588		638
589	/*****************************************************************************/	639	/*****************************************************************************/
590		640
591	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	641	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
592		642
593	int inline_size	643	/* find a suitable new size for the given array, */
		644	/* hopefully by rounding to a ncie-to-malloc size */
		645	inline_size int
594	array_nextsize (int elem, int cur, int cnt)	646	array_nextsize (int elem, int cur, int cnt)
595	{	647	{
596	int ncur = cur + 1;	648	int ncur = cur + 1;
597		649
598	do	650	do
…		…
639	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	691	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
640	}	692	}
641	#endif	693	#endif
642		694
643	#define array_free(stem, idx) \	695	#define array_free(stem, idx) \
644	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	696	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
645		697
646	/*****************************************************************************/	698	/*****************************************************************************/
		699
		700	/* dummy callback for pending events */
		701	static void noinline
		702	pendingcb (EV_P_ ev_prepare *w, int revents)
		703	{
		704	}
647		705
648	void noinline	706	void noinline
649	ev_feed_event (EV_P_ void *w, int revents)	707	ev_feed_event (EV_P_ void *w, int revents)
650	{	708	{
651	W w_ = (W)w;	709	W w_ = (W)w;
…		…
660	pendings [pri][w_->pending - 1].w = w_;	718	pendings [pri][w_->pending - 1].w = w_;
661	pendings [pri][w_->pending - 1].events = revents;	719	pendings [pri][w_->pending - 1].events = revents;
662	}	720	}
663	}	721	}
664		722
665	void inline_speed	723	inline_speed void
		724	feed_reverse (EV_P_ W w)
		725	{
		726	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		727	rfeeds [rfeedcnt++] = w;
		728	}
		729
		730	inline_size void
		731	feed_reverse_done (EV_P_ int revents)
		732	{
		733	do
		734	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		735	while (rfeedcnt);
		736	}
		737
		738	inline_speed void
666	queue_events (EV_P_ W *events, int eventcnt, int type)	739	queue_events (EV_P_ W *events, int eventcnt, int type)
667	{	740	{
668	int i;	741	int i;
669		742
670	for (i = 0; i < eventcnt; ++i)	743	for (i = 0; i < eventcnt; ++i)
671	ev_feed_event (EV_A_ events [i], type);	744	ev_feed_event (EV_A_ events [i], type);
672	}	745	}
673		746
674	/*****************************************************************************/	747	/*****************************************************************************/
675		748
676	void inline_speed	749	inline_speed void
677	fd_event (EV_P_ int fd, int revents)	750	fd_event (EV_P_ int fd, int revents)
678	{	751	{
679	ANFD *anfd = anfds + fd;	752	ANFD *anfd = anfds + fd;
680	ev_io *w;	753	ev_io *w;
681		754
…		…
693	{	766	{
694	if (fd >= 0 && fd < anfdmax)	767	if (fd >= 0 && fd < anfdmax)
695	fd_event (EV_A_ fd, revents);	768	fd_event (EV_A_ fd, revents);
696	}	769	}
697		770
698	void inline_size	771	/* make sure the external fd watch events are in-sync */
		772	/* with the kernel/libev internal state */
		773	inline_size void
699	fd_reify (EV_P)	774	fd_reify (EV_P)
700	{	775	{
701	int i;	776	int i;
702		777
703	for (i = 0; i < fdchangecnt; ++i)	778	for (i = 0; i < fdchangecnt; ++i)
…		…
718	#ifdef EV_FD_TO_WIN32_HANDLE	793	#ifdef EV_FD_TO_WIN32_HANDLE
719	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	794	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
720	#else	795	#else
721	anfd->handle = _get_osfhandle (fd);	796	anfd->handle = _get_osfhandle (fd);
722	#endif	797	#endif
723	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	798	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
724	}	799	}
725	#endif	800	#endif
726		801
727	{	802	{
728	unsigned char o_events = anfd->events;	803	unsigned char o_events = anfd->events;
729	unsigned char o_reify = anfd->reify;	804	unsigned char o_reify = anfd->reify;
730		805
731	anfd->reify = 0;	806	anfd->reify = 0;
732	anfd->events = events;	807	anfd->events = events;
733		808
734	if (o_events != events || o_reify & EV_IOFDSET)	809	if (o_events != events || o_reify & EV__IOFDSET)
735	backend_modify (EV_A_ fd, o_events, events);	810	backend_modify (EV_A_ fd, o_events, events);
736	}	811	}
737	}	812	}
738		813
739	fdchangecnt = 0;	814	fdchangecnt = 0;
740	}	815	}
741		816
742	void inline_size	817	/* something about the given fd changed */
		818	inline_size void
743	fd_change (EV_P_ int fd, int flags)	819	fd_change (EV_P_ int fd, int flags)
744	{	820	{
745	unsigned char reify = anfds [fd].reify;	821	unsigned char reify = anfds [fd].reify;
746	anfds [fd].reify |= flags;	822	anfds [fd].reify |= flags;
747		823
…		…
751	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	827	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
752	fdchanges [fdchangecnt - 1] = fd;	828	fdchanges [fdchangecnt - 1] = fd;
753	}	829	}
754	}	830	}
755		831
756	void inline_speed	832	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		833	inline_speed void
757	fd_kill (EV_P_ int fd)	834	fd_kill (EV_P_ int fd)
758	{	835	{
759	ev_io *w;	836	ev_io *w;
760		837
761	while ((w = (ev_io *)anfds [fd].head))	838	while ((w = (ev_io *)anfds [fd].head))
…		…
763	ev_io_stop (EV_A_ w);	840	ev_io_stop (EV_A_ w);
764	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	841	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
765	}	842	}
766	}	843	}
767		844
768	int inline_size	845	/* check whether the given fd is atcually valid, for error recovery */
		846	inline_size int
769	fd_valid (int fd)	847	fd_valid (int fd)
770	{	848	{
771	#ifdef _WIN32	849	#ifdef _WIN32
772	return _get_osfhandle (fd) != -1;	850	return _get_osfhandle (fd) != -1;
773	#else	851	#else
…		…
810	for (fd = 0; fd < anfdmax; ++fd)	888	for (fd = 0; fd < anfdmax; ++fd)
811	if (anfds [fd].events)	889	if (anfds [fd].events)
812	{	890	{
813	anfds [fd].events = 0;	891	anfds [fd].events = 0;
814	anfds [fd].emask = 0;	892	anfds [fd].emask = 0;
815	fd_change (EV_A_ fd, EV_IOFDSET | 1);	893	fd_change (EV_A_ fd, EV__IOFDSET | 1);
816	}	894	}
817	}	895	}
818		896
819	/*****************************************************************************/	897	/*****************************************************************************/
820		898
…		…
836	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	914	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
837	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	915	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
838	#define UPHEAP_DONE(p,k) ((p) == (k))	916	#define UPHEAP_DONE(p,k) ((p) == (k))
839		917
840	/* away from the root */	918	/* away from the root */
841	void inline_speed	919	inline_speed void
842	downheap (ANHE *heap, int N, int k)	920	downheap (ANHE *heap, int N, int k)
843	{	921	{
844	ANHE he = heap [k];	922	ANHE he = heap [k];
845	ANHE *E = heap + N + HEAP0;	923	ANHE *E = heap + N + HEAP0;
846		924
…		…
886	#define HEAP0 1	964	#define HEAP0 1
887	#define HPARENT(k) ((k) >> 1)	965	#define HPARENT(k) ((k) >> 1)
888	#define UPHEAP_DONE(p,k) (!(p))	966	#define UPHEAP_DONE(p,k) (!(p))
889		967
890	/* away from the root */	968	/* away from the root */
891	void inline_speed	969	inline_speed void
892	downheap (ANHE *heap, int N, int k)	970	downheap (ANHE *heap, int N, int k)
893	{	971	{
894	ANHE he = heap [k];	972	ANHE he = heap [k];
895		973
896	for (;;)	974	for (;;)
…		…
916	ev_active (ANHE_w (he)) = k;	994	ev_active (ANHE_w (he)) = k;
917	}	995	}
918	#endif	996	#endif
919		997
920	/* towards the root */	998	/* towards the root */
921	void inline_speed	999	inline_speed void
922	upheap (ANHE *heap, int k)	1000	upheap (ANHE *heap, int k)
923	{	1001	{
924	ANHE he = heap [k];	1002	ANHE he = heap [k];
925		1003
926	for (;;)	1004	for (;;)
…		…
937		1015
938	heap [k] = he;	1016	heap [k] = he;
939	ev_active (ANHE_w (he)) = k;	1017	ev_active (ANHE_w (he)) = k;
940	}	1018	}
941		1019
942	void inline_size	1020	/* move an element suitably so it is in a correct place */
		1021	inline_size void
943	adjustheap (ANHE *heap, int N, int k)	1022	adjustheap (ANHE *heap, int N, int k)
944	{	1023	{
945	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1024	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
946	upheap (heap, k);	1025	upheap (heap, k);
947	else	1026	else
948	downheap (heap, N, k);	1027	downheap (heap, N, k);
949	}	1028	}
950		1029
951	/* rebuild the heap: this function is used only once and executed rarely */	1030	/* rebuild the heap: this function is used only once and executed rarely */
952	void inline_size	1031	inline_size void
953	reheap (ANHE *heap, int N)	1032	reheap (ANHE *heap, int N)
954	{	1033	{
955	int i;	1034	int i;
956		1035
957	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1036	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
960	upheap (heap, i + HEAP0);	1039	upheap (heap, i + HEAP0);
961	}	1040	}
962		1041
963	/*****************************************************************************/	1042	/*****************************************************************************/
964		1043
		1044	/* associate signal watchers to a signal signal */
965	typedef struct	1045	typedef struct
966	{	1046	{
967	WL head;	1047	WL head;
968	EV_ATOMIC_T gotsig;	1048	EV_ATOMIC_T gotsig;
969	} ANSIG;	1049	} ANSIG;
…		…
973		1053
974	static EV_ATOMIC_T gotsig;	1054	static EV_ATOMIC_T gotsig;
975		1055
976	/*****************************************************************************/	1056	/*****************************************************************************/
977		1057
978	void inline_speed	1058	/* used to prepare libev internal fd's */
		1059	/* this is not fork-safe */
		1060	inline_speed void
979	fd_intern (int fd)	1061	fd_intern (int fd)
980	{	1062	{
981	#ifdef _WIN32	1063	#ifdef _WIN32
982	unsigned long arg = 1;	1064	unsigned long arg = 1;
983	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1065	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
988	}	1070	}
989		1071
990	static void noinline	1072	static void noinline
991	evpipe_init (EV_P)	1073	evpipe_init (EV_P)
992	{	1074	{
993	if (!ev_is_active (&pipeev))	1075	if (!ev_is_active (&pipe_w))
994	{	1076	{
995	#if EV_USE_EVENTFD	1077	#if EV_USE_EVENTFD
996	if ((evfd = eventfd (0, 0)) >= 0)	1078	if ((evfd = eventfd (0, 0)) >= 0)
997	{	1079	{
998	evpipe [0] = -1;	1080	evpipe [0] = -1;
999	fd_intern (evfd);	1081	fd_intern (evfd);
1000	ev_io_set (&pipeev, evfd, EV_READ);	1082	ev_io_set (&pipe_w, evfd, EV_READ);
1001	}	1083	}
1002	else	1084	else
1003	#endif	1085	#endif
1004	{	1086	{
1005	while (pipe (evpipe))	1087	while (pipe (evpipe))
1006	ev_syserr ("(libev) error creating signal/async pipe");	1088	ev_syserr ("(libev) error creating signal/async pipe");
1007		1089
1008	fd_intern (evpipe [0]);	1090	fd_intern (evpipe [0]);
1009	fd_intern (evpipe [1]);	1091	fd_intern (evpipe [1]);
1010	ev_io_set (&pipeev, evpipe [0], EV_READ);	1092	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1011	}	1093	}
1012		1094
1013	ev_io_start (EV_A_ &pipeev);	1095	ev_io_start (EV_A_ &pipe_w);
1014	ev_unref (EV_A); /* watcher should not keep loop alive */	1096	ev_unref (EV_A); /* watcher should not keep loop alive */
1015	}	1097	}
1016	}	1098	}
1017		1099
1018	void inline_size	1100	inline_size void
1019	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1101	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1020	{	1102	{
1021	if (!*flag)	1103	if (!*flag)
1022	{	1104	{
1023	int old_errno = errno; /* save errno because write might clobber it */	1105	int old_errno = errno; /* save errno because write might clobber it */
…		…
1036		1118
1037	errno = old_errno;	1119	errno = old_errno;
1038	}	1120	}
1039	}	1121	}
1040		1122
		1123	/* called whenever the libev signal pipe */
		1124	/* got some events (signal, async) */
1041	static void	1125	static void
1042	pipecb (EV_P_ ev_io *iow, int revents)	1126	pipecb (EV_P_ ev_io *iow, int revents)
1043	{	1127	{
1044	#if EV_USE_EVENTFD	1128	#if EV_USE_EVENTFD
1045	if (evfd >= 0)	1129	if (evfd >= 0)
…		…
1101	ev_feed_signal_event (EV_P_ int signum)	1185	ev_feed_signal_event (EV_P_ int signum)
1102	{	1186	{
1103	WL w;	1187	WL w;
1104		1188
1105	#if EV_MULTIPLICITY	1189	#if EV_MULTIPLICITY
1106	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1190	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1107	#endif	1191	#endif
1108		1192
1109	--signum;	1193	--signum;
1110		1194
1111	if (signum < 0 || signum >= signalmax)	1195	if (signum < 0 || signum >= signalmax)
…		…
1127		1211
1128	#ifndef WIFCONTINUED	1212	#ifndef WIFCONTINUED
1129	# define WIFCONTINUED(status) 0	1213	# define WIFCONTINUED(status) 0
1130	#endif	1214	#endif
1131		1215
1132	void inline_speed	1216	/* handle a single child status event */
		1217	inline_speed void
1133	child_reap (EV_P_ int chain, int pid, int status)	1218	child_reap (EV_P_ int chain, int pid, int status)
1134	{	1219	{
1135	ev_child *w;	1220	ev_child *w;
1136	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1221	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1137		1222
…		…
1150		1235
1151	#ifndef WCONTINUED	1236	#ifndef WCONTINUED
1152	# define WCONTINUED 0	1237	# define WCONTINUED 0
1153	#endif	1238	#endif
1154		1239
		1240	/* called on sigchld etc., calls waitpid */
1155	static void	1241	static void
1156	childcb (EV_P_ ev_signal *sw, int revents)	1242	childcb (EV_P_ ev_signal *sw, int revents)
1157	{	1243	{
1158	int pid, status;	1244	int pid, status;
1159		1245
…		…
1240	/* kqueue is borked on everything but netbsd apparently */	1326	/* kqueue is borked on everything but netbsd apparently */
1241	/* it usually doesn't work correctly on anything but sockets and pipes */	1327	/* it usually doesn't work correctly on anything but sockets and pipes */
1242	flags &= ~EVBACKEND_KQUEUE;	1328	flags &= ~EVBACKEND_KQUEUE;
1243	#endif	1329	#endif
1244	#ifdef __APPLE__	1330	#ifdef __APPLE__
1245	// flags &= ~EVBACKEND_KQUEUE; for documentation	1331	/* only select works correctly on that "unix-certified" platform */
1246	flags &= ~EVBACKEND_POLL;	1332	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1333	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1247	#endif	1334	#endif
1248		1335
1249	return flags;	1336	return flags;
1250	}	1337	}
1251		1338
…		…
1283	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1370	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1284	{	1371	{
1285	timeout_blocktime = interval;	1372	timeout_blocktime = interval;
1286	}	1373	}
1287		1374
		1375	/* initialise a loop structure, must be zero-initialised */
1288	static void noinline	1376	static void noinline
1289	loop_init (EV_P_ unsigned int flags)	1377	loop_init (EV_P_ unsigned int flags)
1290	{	1378	{
1291	if (!backend)	1379	if (!backend)
1292	{	1380	{
		1381	#if EV_USE_REALTIME
		1382	if (!have_realtime)
		1383	{
		1384	struct timespec ts;
		1385
		1386	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1387	have_realtime = 1;
		1388	}
		1389	#endif
		1390
1293	#if EV_USE_MONOTONIC	1391	#if EV_USE_MONOTONIC
		1392	if (!have_monotonic)
1294	{	1393	{
1295	struct timespec ts;	1394	struct timespec ts;
		1395
1296	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1396	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1297	have_monotonic = 1;	1397	have_monotonic = 1;
1298	}	1398	}
1299	#endif	1399	#endif
1300		1400
1301	ev_rt_now = ev_time ();	1401	ev_rt_now = ev_time ();
1302	mn_now = get_clock ();	1402	mn_now = get_clock ();
1303	now_floor = mn_now;	1403	now_floor = mn_now;
…		…
1340	#endif	1440	#endif
1341	#if EV_USE_SELECT	1441	#if EV_USE_SELECT
1342	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1442	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1343	#endif	1443	#endif
1344		1444
		1445	ev_prepare_init (&pending_w, pendingcb);
		1446
1345	ev_init (&pipeev, pipecb);	1447	ev_init (&pipe_w, pipecb);
1346	ev_set_priority (&pipeev, EV_MAXPRI);	1448	ev_set_priority (&pipe_w, EV_MAXPRI);
1347	}	1449	}
1348	}	1450	}
1349		1451
		1452	/* free up a loop structure */
1350	static void noinline	1453	static void noinline
1351	loop_destroy (EV_P)	1454	loop_destroy (EV_P)
1352	{	1455	{
1353	int i;	1456	int i;
1354		1457
1355	if (ev_is_active (&pipeev))	1458	if (ev_is_active (&pipe_w))
1356	{	1459	{
1357	ev_ref (EV_A); /* signal watcher */	1460	ev_ref (EV_A); /* signal watcher */
1358	ev_io_stop (EV_A_ &pipeev);	1461	ev_io_stop (EV_A_ &pipe_w);
1359		1462
1360	#if EV_USE_EVENTFD	1463	#if EV_USE_EVENTFD
1361	if (evfd >= 0)	1464	if (evfd >= 0)
1362	close (evfd);	1465	close (evfd);
1363	#endif	1466	#endif
…		…
1402	}	1505	}
1403		1506
1404	ev_free (anfds); anfdmax = 0;	1507	ev_free (anfds); anfdmax = 0;
1405		1508
1406	/* have to use the microsoft-never-gets-it-right macro */	1509	/* have to use the microsoft-never-gets-it-right macro */
		1510	array_free (rfeed, EMPTY);
1407	array_free (fdchange, EMPTY);	1511	array_free (fdchange, EMPTY);
1408	array_free (timer, EMPTY);	1512	array_free (timer, EMPTY);
1409	#if EV_PERIODIC_ENABLE	1513	#if EV_PERIODIC_ENABLE
1410	array_free (periodic, EMPTY);	1514	array_free (periodic, EMPTY);
1411	#endif	1515	#endif
…		…
1420		1524
1421	backend = 0;	1525	backend = 0;
1422	}	1526	}
1423		1527
1424	#if EV_USE_INOTIFY	1528	#if EV_USE_INOTIFY
1425	void inline_size infy_fork (EV_P);	1529	inline_size void infy_fork (EV_P);
1426	#endif	1530	#endif
1427		1531
1428	void inline_size	1532	inline_size void
1429	loop_fork (EV_P)	1533	loop_fork (EV_P)
1430	{	1534	{
1431	#if EV_USE_PORT	1535	#if EV_USE_PORT
1432	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1536	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1433	#endif	1537	#endif
…		…
1439	#endif	1543	#endif
1440	#if EV_USE_INOTIFY	1544	#if EV_USE_INOTIFY
1441	infy_fork (EV_A);	1545	infy_fork (EV_A);
1442	#endif	1546	#endif
1443		1547
1444	if (ev_is_active (&pipeev))	1548	if (ev_is_active (&pipe_w))
1445	{	1549	{
1446	/* this "locks" the handlers against writing to the pipe */	1550	/* this "locks" the handlers against writing to the pipe */
1447	/* while we modify the fd vars */	1551	/* while we modify the fd vars */
1448	gotsig = 1;	1552	gotsig = 1;
1449	#if EV_ASYNC_ENABLE	1553	#if EV_ASYNC_ENABLE
1450	gotasync = 1;	1554	gotasync = 1;
1451	#endif	1555	#endif
1452		1556
1453	ev_ref (EV_A);	1557	ev_ref (EV_A);
1454	ev_io_stop (EV_A_ &pipeev);	1558	ev_io_stop (EV_A_ &pipe_w);
1455		1559
1456	#if EV_USE_EVENTFD	1560	#if EV_USE_EVENTFD
1457	if (evfd >= 0)	1561	if (evfd >= 0)
1458	close (evfd);	1562	close (evfd);
1459	#endif	1563	#endif
…		…
1464	close (evpipe [1]);	1568	close (evpipe [1]);
1465	}	1569	}
1466		1570
1467	evpipe_init (EV_A);	1571	evpipe_init (EV_A);
1468	/* now iterate over everything, in case we missed something */	1572	/* now iterate over everything, in case we missed something */
1469	pipecb (EV_A_ &pipeev, EV_READ);	1573	pipecb (EV_A_ &pipe_w, EV_READ);
1470	}	1574	}
1471		1575
1472	postfork = 0;	1576	postfork = 0;
1473	}	1577	}
1474		1578
…		…
1504		1608
1505	#if EV_VERIFY	1609	#if EV_VERIFY
1506	static void noinline	1610	static void noinline
1507	verify_watcher (EV_P_ W w)	1611	verify_watcher (EV_P_ W w)
1508	{	1612	{
1509	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1613	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1510		1614
1511	if (w->pending)	1615	if (w->pending)
1512	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	1616	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1513	}	1617	}
1514		1618
1515	static void noinline	1619	static void noinline
1516	verify_heap (EV_P_ ANHE *heap, int N)	1620	verify_heap (EV_P_ ANHE *heap, int N)
1517	{	1621	{
1518	int i;	1622	int i;
1519		1623
1520	for (i = HEAP0; i < N + HEAP0; ++i)	1624	for (i = HEAP0; i < N + HEAP0; ++i)
1521	{	1625	{
1522	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));	1626	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])));	1627	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]))));	1628	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1525		1629
1526	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1630	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1527	}	1631	}
1528	}	1632	}
1529		1633
1530	static void noinline	1634	static void noinline
1531	array_verify (EV_P_ W *ws, int cnt)	1635	array_verify (EV_P_ W *ws, int cnt)
1532	{	1636	{
1533	while (cnt--)	1637	while (cnt--)
1534	{	1638	{
1535	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1639	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1536	verify_watcher (EV_A_ ws [cnt]);	1640	verify_watcher (EV_A_ ws [cnt]);
1537	}	1641	}
1538	}	1642	}
1539	#endif	1643	#endif
1540		1644
…		…
1547		1651
1548	assert (activecnt >= -1);	1652	assert (activecnt >= -1);
1549		1653
1550	assert (fdchangemax >= fdchangecnt);	1654	assert (fdchangemax >= fdchangecnt);
1551	for (i = 0; i < fdchangecnt; ++i)	1655	for (i = 0; i < fdchangecnt; ++i)
1552	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1656	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1553		1657
1554	assert (anfdmax >= 0);	1658	assert (anfdmax >= 0);
1555	for (i = 0; i < anfdmax; ++i)	1659	for (i = 0; i < anfdmax; ++i)
1556	for (w = anfds [i].head; w; w = w->next)	1660	for (w = anfds [i].head; w; w = w->next)
1557	{	1661	{
1558	verify_watcher (EV_A_ (W)w);	1662	verify_watcher (EV_A_ (W)w);
1559	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1663	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));	1664	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1561	}	1665	}
1562		1666
1563	assert (timermax >= timercnt);	1667	assert (timermax >= timercnt);
1564	verify_heap (EV_A_ timers, timercnt);	1668	verify_heap (EV_A_ timers, timercnt);
1565		1669
…		…
1670	ev_invoke (EV_P_ void *w, int revents)	1774	ev_invoke (EV_P_ void *w, int revents)
1671	{	1775	{
1672	EV_CB_INVOKE ((W)w, revents);	1776	EV_CB_INVOKE ((W)w, revents);
1673	}	1777	}
1674		1778
1675	void inline_speed	1779	inline_speed void
1676	call_pending (EV_P)	1780	call_pending (EV_P)
1677	{	1781	{
1678	int pri;	1782	int pri;
1679		1783
1680	for (pri = NUMPRI; pri--; )	1784	for (pri = NUMPRI; pri--; )
1681	while (pendingcnt [pri])	1785	while (pendingcnt [pri])
1682	{	1786	{
1683	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1787	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1684		1788
1685	if (expect_true (p->w))
1686	{
1687	/*assert (("non-pending watcher on pending list", p->w->pending));*/	1789	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1790	/* ^ this is no longer true, as pending_w could be here */
1688		1791
1689	p->w->pending = 0;	1792	p->w->pending = 0;
1690	EV_CB_INVOKE (p->w, p->events);	1793	EV_CB_INVOKE (p->w, p->events);
1691	EV_FREQUENT_CHECK;	1794	EV_FREQUENT_CHECK;
1692	}
1693	}	1795	}
1694	}	1796	}
1695		1797
1696	#if EV_IDLE_ENABLE	1798	#if EV_IDLE_ENABLE
1697	void inline_size	1799	/* make idle watchers pending. this handles the "call-idle */
		1800	/* only when higher priorities are idle" logic */
		1801	inline_size void
1698	idle_reify (EV_P)	1802	idle_reify (EV_P)
1699	{	1803	{
1700	if (expect_false (idleall))	1804	if (expect_false (idleall))
1701	{	1805	{
1702	int pri;	1806	int pri;
…		…
1714	}	1818	}
1715	}	1819	}
1716	}	1820	}
1717	#endif	1821	#endif
1718		1822
1719	void inline_size	1823	/* make timers pending */
		1824	inline_size void
1720	timers_reify (EV_P)	1825	timers_reify (EV_P)
1721	{	1826	{
1722	EV_FREQUENT_CHECK;	1827	EV_FREQUENT_CHECK;
1723		1828
1724	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1829	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1725	{	1830	{
1726	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1831	do
1727
1728	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1729
1730	/* first reschedule or stop timer */
1731	if (w->repeat)
1732	{	1832	{
		1833	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1834
		1835	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1836
		1837	/* first reschedule or stop timer */
		1838	if (w->repeat)
		1839	{
1733	ev_at (w) += w->repeat;	1840	ev_at (w) += w->repeat;
1734	if (ev_at (w) < mn_now)	1841	if (ev_at (w) < mn_now)
1735	ev_at (w) = mn_now;	1842	ev_at (w) = mn_now;
1736		1843
1737	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1844	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1738		1845
1739	ANHE_at_cache (timers [HEAP0]);	1846	ANHE_at_cache (timers [HEAP0]);
1740	downheap (timers, timercnt, HEAP0);	1847	downheap (timers, timercnt, HEAP0);
		1848	}
		1849	else
		1850	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1851
		1852	EV_FREQUENT_CHECK;
		1853	feed_reverse (EV_A_ (W)w);
1741	}	1854	}
1742	else	1855	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1743	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1744		1856
1745	EV_FREQUENT_CHECK;
1746	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1857	feed_reverse_done (EV_A_ EV_TIMEOUT);
1747	}	1858	}
1748	}	1859	}
1749		1860
1750	#if EV_PERIODIC_ENABLE	1861	#if EV_PERIODIC_ENABLE
1751	void inline_size	1862	/* make periodics pending */
		1863	inline_size void
1752	periodics_reify (EV_P)	1864	periodics_reify (EV_P)
1753	{	1865	{
1754	EV_FREQUENT_CHECK;	1866	EV_FREQUENT_CHECK;
1755		1867
1756	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1868	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1757	{	1869	{
1758	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1870	int feed_count = 0;
1759		1871
1760	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1872	do
1761
1762	/* first reschedule or stop timer */
1763	if (w->reschedule_cb)
1764	{	1873	{
		1874	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1875
		1876	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		1877
		1878	/* first reschedule or stop timer */
		1879	if (w->reschedule_cb)
		1880	{
1765	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1881	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1766		1882
1767	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1883	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1768		1884
1769	ANHE_at_cache (periodics [HEAP0]);	1885	ANHE_at_cache (periodics [HEAP0]);
1770	downheap (periodics, periodiccnt, HEAP0);	1886	downheap (periodics, periodiccnt, HEAP0);
		1887	}
		1888	else if (w->interval)
		1889	{
		1890	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1891	/* if next trigger time is not sufficiently in the future, put it there */
		1892	/* this might happen because of floating point inexactness */
		1893	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1894	{
		1895	ev_at (w) += w->interval;
		1896
		1897	/* if interval is unreasonably low we might still have a time in the past */
		1898	/* so correct this. this will make the periodic very inexact, but the user */
		1899	/* has effectively asked to get triggered more often than possible */
		1900	if (ev_at (w) < ev_rt_now)
		1901	ev_at (w) = ev_rt_now;
		1902	}
		1903
		1904	ANHE_at_cache (periodics [HEAP0]);
		1905	downheap (periodics, periodiccnt, HEAP0);
		1906	}
		1907	else
		1908	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1909
		1910	EV_FREQUENT_CHECK;
		1911	feed_reverse (EV_A_ (W)w);
1771	}	1912	}
1772	else if (w->interval)	1913	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1773	{
1774	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1775	/* if next trigger time is not sufficiently in the future, put it there */
1776	/* this might happen because of floating point inexactness */
1777	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1778	{
1779	ev_at (w) += w->interval;
1780		1914
1781	/* if interval is unreasonably low we might still have a time in the past */
1782	/* so correct this. this will make the periodic very inexact, but the user */
1783	/* has effectively asked to get triggered more often than possible */
1784	if (ev_at (w) < ev_rt_now)
1785	ev_at (w) = ev_rt_now;
1786	}
1787
1788	ANHE_at_cache (periodics [HEAP0]);
1789	downheap (periodics, periodiccnt, HEAP0);
1790	}
1791	else
1792	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1793
1794	EV_FREQUENT_CHECK;
1795	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1915	feed_reverse_done (EV_A_ EV_PERIODIC);
1796	}	1916	}
1797	}	1917	}
1798		1918
		1919	/* simply recalculate all periodics */
		1920	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1799	static void noinline	1921	static void noinline
1800	periodics_reschedule (EV_P)	1922	periodics_reschedule (EV_P)
1801	{	1923	{
1802	int i;	1924	int i;
1803		1925
…		…
1816		1938
1817	reheap (periodics, periodiccnt);	1939	reheap (periodics, periodiccnt);
1818	}	1940	}
1819	#endif	1941	#endif
1820		1942
1821	void inline_speed	1943	/* adjust all timers by a given offset */
		1944	static void noinline
		1945	timers_reschedule (EV_P_ ev_tstamp adjust)
		1946	{
		1947	int i;
		1948
		1949	for (i = 0; i < timercnt; ++i)
		1950	{
		1951	ANHE *he = timers + i + HEAP0;
		1952	ANHE_w (*he)->at += adjust;
		1953	ANHE_at_cache (*he);
		1954	}
		1955	}
		1956
		1957	/* fetch new monotonic and realtime times from the kernel */
		1958	/* also detetc if there was a timejump, and act accordingly */
		1959	inline_speed void
1822	time_update (EV_P_ ev_tstamp max_block)	1960	time_update (EV_P_ ev_tstamp max_block)
1823	{	1961	{
1824	int i;
1825
1826	#if EV_USE_MONOTONIC	1962	#if EV_USE_MONOTONIC
1827	if (expect_true (have_monotonic))	1963	if (expect_true (have_monotonic))
1828	{	1964	{
		1965	int i;
1829	ev_tstamp odiff = rtmn_diff;	1966	ev_tstamp odiff = rtmn_diff;
1830		1967
1831	mn_now = get_clock ();	1968	mn_now = get_clock ();
1832		1969
1833	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1970	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1859	ev_rt_now = ev_time ();	1996	ev_rt_now = ev_time ();
1860	mn_now = get_clock ();	1997	mn_now = get_clock ();
1861	now_floor = mn_now;	1998	now_floor = mn_now;
1862	}	1999	}
1863		2000
		2001	/* no timer adjustment, as the monotonic clock doesn't jump */
		2002	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1864	# if EV_PERIODIC_ENABLE	2003	# if EV_PERIODIC_ENABLE
1865	periodics_reschedule (EV_A);	2004	periodics_reschedule (EV_A);
1866	# endif	2005	# endif
1867	/* no timer adjustment, as the monotonic clock doesn't jump */
1868	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1869	}	2006	}
1870	else	2007	else
1871	#endif	2008	#endif
1872	{	2009	{
1873	ev_rt_now = ev_time ();	2010	ev_rt_now = ev_time ();
1874		2011
1875	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2012	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1876	{	2013	{
		2014	/* adjust timers. this is easy, as the offset is the same for all of them */
		2015	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1877	#if EV_PERIODIC_ENABLE	2016	#if EV_PERIODIC_ENABLE
1878	periodics_reschedule (EV_A);	2017	periodics_reschedule (EV_A);
1879	#endif	2018	#endif
1880	/* adjust timers. this is easy, as the offset is the same for all of them */
1881	for (i = 0; i < timercnt; ++i)
1882	{
1883	ANHE *he = timers + i + HEAP0;
1884	ANHE_w (*he)->at += ev_rt_now - mn_now;
1885	ANHE_at_cache (*he);
1886	}
1887	}	2019	}
1888		2020
1889	mn_now = ev_rt_now;	2021	mn_now = ev_rt_now;
1890	}	2022	}
1891	}
1892
1893	void
1894	ev_ref (EV_P)
1895	{
1896	++activecnt;
1897	}
1898
1899	void
1900	ev_unref (EV_P)
1901	{
1902	--activecnt;
1903	}
1904
1905	void
1906	ev_now_update (EV_P)
1907	{
1908	time_update (EV_A_ 1e100);
1909	}	2023	}
1910		2024
1911	static int loop_done;	2025	static int loop_done;
1912		2026
1913	void	2027	void
…		…
1947	{	2061	{
1948	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2062	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1949	call_pending (EV_A);	2063	call_pending (EV_A);
1950	}	2064	}
1951		2065
1952	if (expect_false (!activecnt))
1953	break;
1954
1955	/* we might have forked, so reify kernel state if necessary */	2066	/* we might have forked, so reify kernel state if necessary */
1956	if (expect_false (postfork))	2067	if (expect_false (postfork))
1957	loop_fork (EV_A);	2068	loop_fork (EV_A);
1958		2069
1959	/* update fd-related kernel structures */	2070	/* update fd-related kernel structures */
…		…
1964	ev_tstamp waittime = 0.;	2075	ev_tstamp waittime = 0.;
1965	ev_tstamp sleeptime = 0.;	2076	ev_tstamp sleeptime = 0.;
1966		2077
1967	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2078	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1968	{	2079	{
		2080	/* remember old timestamp for io_blocktime calculation */
		2081	ev_tstamp prev_mn_now = mn_now;
		2082
1969	/* update time to cancel out callback processing overhead */	2083	/* update time to cancel out callback processing overhead */
1970	time_update (EV_A_ 1e100);	2084	time_update (EV_A_ 1e100);
1971		2085
1972	waittime = MAX_BLOCKTIME;	2086	waittime = MAX_BLOCKTIME;
1973		2087
…		…
1983	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2097	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1984	if (waittime > to) waittime = to;	2098	if (waittime > to) waittime = to;
1985	}	2099	}
1986	#endif	2100	#endif
1987		2101
		2102	/* don't let timeouts decrease the waittime below timeout_blocktime */
1988	if (expect_false (waittime < timeout_blocktime))	2103	if (expect_false (waittime < timeout_blocktime))
1989	waittime = timeout_blocktime;	2104	waittime = timeout_blocktime;
1990		2105
1991	sleeptime = waittime - backend_fudge;	2106	/* extra check because io_blocktime is commonly 0 */
1992
1993	if (expect_true (sleeptime > io_blocktime))	2107	if (expect_false (io_blocktime))
1994	sleeptime = io_blocktime;
1995
1996	if (sleeptime)
1997	{	2108	{
		2109	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2110
		2111	if (sleeptime > waittime - backend_fudge)
		2112	sleeptime = waittime - backend_fudge;
		2113
		2114	if (expect_true (sleeptime > 0.))
		2115	{
1998	ev_sleep (sleeptime);	2116	ev_sleep (sleeptime);
1999	waittime -= sleeptime;	2117	waittime -= sleeptime;
		2118	}
2000	}	2119	}
2001	}	2120	}
2002		2121
2003	++loop_count;	2122	++loop_count;
2004	backend_poll (EV_A_ waittime);	2123	backend_poll (EV_A_ waittime);
…		…
2038	ev_unloop (EV_P_ int how)	2157	ev_unloop (EV_P_ int how)
2039	{	2158	{
2040	loop_done = how;	2159	loop_done = how;
2041	}	2160	}
2042		2161
		2162	void
		2163	ev_ref (EV_P)
		2164	{
		2165	++activecnt;
		2166	}
		2167
		2168	void
		2169	ev_unref (EV_P)
		2170	{
		2171	--activecnt;
		2172	}
		2173
		2174	void
		2175	ev_now_update (EV_P)
		2176	{
		2177	time_update (EV_A_ 1e100);
		2178	}
		2179
		2180	void
		2181	ev_suspend (EV_P)
		2182	{
		2183	ev_now_update (EV_A);
		2184	}
		2185
		2186	void
		2187	ev_resume (EV_P)
		2188	{
		2189	ev_tstamp mn_prev = mn_now;
		2190
		2191	ev_now_update (EV_A);
		2192	timers_reschedule (EV_A_ mn_now - mn_prev);
		2193	#if EV_PERIODIC_ENABLE
		2194	/* TODO: really do this? */
		2195	periodics_reschedule (EV_A);
		2196	#endif
		2197	}
		2198
2043	/*****************************************************************************/	2199	/*****************************************************************************/
		2200	/* singly-linked list management, used when the expected list length is short */
2044		2201
2045	void inline_size	2202	inline_size void
2046	wlist_add (WL *head, WL elem)	2203	wlist_add (WL *head, WL elem)
2047	{	2204	{
2048	elem->next = *head;	2205	elem->next = *head;
2049	*head = elem;	2206	*head = elem;
2050	}	2207	}
2051		2208
2052	void inline_size	2209	inline_size void
2053	wlist_del (WL *head, WL elem)	2210	wlist_del (WL *head, WL elem)
2054	{	2211	{
2055	while (*head)	2212	while (*head)
2056	{	2213	{
2057	if (*head == elem)	2214	if (*head == elem)
…		…
2062		2219
2063	head = &(*head)->next;	2220	head = &(*head)->next;
2064	}	2221	}
2065	}	2222	}
2066		2223
2067	void inline_speed	2224	/* internal, faster, version of ev_clear_pending */
		2225	inline_speed void
2068	clear_pending (EV_P_ W w)	2226	clear_pending (EV_P_ W w)
2069	{	2227	{
2070	if (w->pending)	2228	if (w->pending)
2071	{	2229	{
2072	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2230	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2073	w->pending = 0;	2231	w->pending = 0;
2074	}	2232	}
2075	}	2233	}
2076		2234
2077	int	2235	int
…		…
2081	int pending = w_->pending;	2239	int pending = w_->pending;
2082		2240
2083	if (expect_true (pending))	2241	if (expect_true (pending))
2084	{	2242	{
2085	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2243	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2244	p->w = (W)&pending_w;
2086	w_->pending = 0;	2245	w_->pending = 0;
2087	p->w = 0;
2088	return p->events;	2246	return p->events;
2089	}	2247	}
2090	else	2248	else
2091	return 0;	2249	return 0;
2092	}	2250	}
2093		2251
2094	void inline_size	2252	inline_size void
2095	pri_adjust (EV_P_ W w)	2253	pri_adjust (EV_P_ W w)
2096	{	2254	{
2097	int pri = w->priority;	2255	int pri = w->priority;
2098	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2256	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2099	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2257	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2100	w->priority = pri;	2258	w->priority = pri;
2101	}	2259	}
2102		2260
2103	void inline_speed	2261	inline_speed void
2104	ev_start (EV_P_ W w, int active)	2262	ev_start (EV_P_ W w, int active)
2105	{	2263	{
2106	pri_adjust (EV_A_ w);	2264	pri_adjust (EV_A_ w);
2107	w->active = active;	2265	w->active = active;
2108	ev_ref (EV_A);	2266	ev_ref (EV_A);
2109	}	2267	}
2110		2268
2111	void inline_size	2269	inline_size void
2112	ev_stop (EV_P_ W w)	2270	ev_stop (EV_P_ W w)
2113	{	2271	{
2114	ev_unref (EV_A);	2272	ev_unref (EV_A);
2115	w->active = 0;	2273	w->active = 0;
2116	}	2274	}
…		…
2123	int fd = w->fd;	2281	int fd = w->fd;
2124		2282
2125	if (expect_false (ev_is_active (w)))	2283	if (expect_false (ev_is_active (w)))
2126	return;	2284	return;
2127		2285
2128	assert (("ev_io_start called with negative fd", fd >= 0));	2286	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))));	2287	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2130		2288
2131	EV_FREQUENT_CHECK;	2289	EV_FREQUENT_CHECK;
2132		2290
2133	ev_start (EV_A_ (W)w, 1);	2291	ev_start (EV_A_ (W)w, 1);
2134	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2292	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2135	wlist_add (&anfds[fd].head, (WL)w);	2293	wlist_add (&anfds[fd].head, (WL)w);
2136		2294
2137	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2295	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2138	w->events &= ~EV_IOFDSET;	2296	w->events &= ~EV__IOFDSET;
2139		2297
2140	EV_FREQUENT_CHECK;	2298	EV_FREQUENT_CHECK;
2141	}	2299	}
2142		2300
2143	void noinline	2301	void noinline
…		…
2145	{	2303	{
2146	clear_pending (EV_A_ (W)w);	2304	clear_pending (EV_A_ (W)w);
2147	if (expect_false (!ev_is_active (w)))	2305	if (expect_false (!ev_is_active (w)))
2148	return;	2306	return;
2149		2307
2150	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2308	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2151		2309
2152	EV_FREQUENT_CHECK;	2310	EV_FREQUENT_CHECK;
2153		2311
2154	wlist_del (&anfds[w->fd].head, (WL)w);	2312	wlist_del (&anfds[w->fd].head, (WL)w);
2155	ev_stop (EV_A_ (W)w);	2313	ev_stop (EV_A_ (W)w);
…		…
2165	if (expect_false (ev_is_active (w)))	2323	if (expect_false (ev_is_active (w)))
2166	return;	2324	return;
2167		2325
2168	ev_at (w) += mn_now;	2326	ev_at (w) += mn_now;
2169		2327
2170	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2328	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2171		2329
2172	EV_FREQUENT_CHECK;	2330	EV_FREQUENT_CHECK;
2173		2331
2174	++timercnt;	2332	++timercnt;
2175	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2333	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2178	ANHE_at_cache (timers [ev_active (w)]);	2336	ANHE_at_cache (timers [ev_active (w)]);
2179	upheap (timers, ev_active (w));	2337	upheap (timers, ev_active (w));
2180		2338
2181	EV_FREQUENT_CHECK;	2339	EV_FREQUENT_CHECK;
2182		2340
2183	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2341	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2184	}	2342	}
2185		2343
2186	void noinline	2344	void noinline
2187	ev_timer_stop (EV_P_ ev_timer *w)	2345	ev_timer_stop (EV_P_ ev_timer *w)
2188	{	2346	{
…		…
2193	EV_FREQUENT_CHECK;	2351	EV_FREQUENT_CHECK;
2194		2352
2195	{	2353	{
2196	int active = ev_active (w);	2354	int active = ev_active (w);
2197		2355
2198	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2356	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2199		2357
2200	--timercnt;	2358	--timercnt;
2201		2359
2202	if (expect_true (active < timercnt + HEAP0))	2360	if (expect_true (active < timercnt + HEAP0))
2203	{	2361	{
…		…
2247		2405
2248	if (w->reschedule_cb)	2406	if (w->reschedule_cb)
2249	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2407	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2250	else if (w->interval)	2408	else if (w->interval)
2251	{	2409	{
2252	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2410	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 */	2411	/* 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;	2412	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2255	}	2413	}
2256	else	2414	else
2257	ev_at (w) = w->offset;	2415	ev_at (w) = w->offset;
…		…
2265	ANHE_at_cache (periodics [ev_active (w)]);	2423	ANHE_at_cache (periodics [ev_active (w)]);
2266	upheap (periodics, ev_active (w));	2424	upheap (periodics, ev_active (w));
2267		2425
2268	EV_FREQUENT_CHECK;	2426	EV_FREQUENT_CHECK;
2269		2427
2270	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2428	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2271	}	2429	}
2272		2430
2273	void noinline	2431	void noinline
2274	ev_periodic_stop (EV_P_ ev_periodic *w)	2432	ev_periodic_stop (EV_P_ ev_periodic *w)
2275	{	2433	{
…		…
2280	EV_FREQUENT_CHECK;	2438	EV_FREQUENT_CHECK;
2281		2439
2282	{	2440	{
2283	int active = ev_active (w);	2441	int active = ev_active (w);
2284		2442
2285	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2443	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2286		2444
2287	--periodiccnt;	2445	--periodiccnt;
2288		2446
2289	if (expect_true (active < periodiccnt + HEAP0))	2447	if (expect_true (active < periodiccnt + HEAP0))
2290	{	2448	{
…		…
2313		2471
2314	void noinline	2472	void noinline
2315	ev_signal_start (EV_P_ ev_signal *w)	2473	ev_signal_start (EV_P_ ev_signal *w)
2316	{	2474	{
2317	#if EV_MULTIPLICITY	2475	#if EV_MULTIPLICITY
2318	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2476	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2319	#endif	2477	#endif
2320	if (expect_false (ev_is_active (w)))	2478	if (expect_false (ev_is_active (w)))
2321	return;	2479	return;
2322		2480
2323	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2481	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2324		2482
2325	evpipe_init (EV_A);	2483	evpipe_init (EV_A);
2326		2484
2327	EV_FREQUENT_CHECK;	2485	EV_FREQUENT_CHECK;
2328		2486
…		…
2379		2537
2380	void	2538	void
2381	ev_child_start (EV_P_ ev_child *w)	2539	ev_child_start (EV_P_ ev_child *w)
2382	{	2540	{
2383	#if EV_MULTIPLICITY	2541	#if EV_MULTIPLICITY
2384	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2542	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2385	#endif	2543	#endif
2386	if (expect_false (ev_is_active (w)))	2544	if (expect_false (ev_is_active (w)))
2387	return;	2545	return;
2388		2546
2389	EV_FREQUENT_CHECK;	2547	EV_FREQUENT_CHECK;
…		…
2414	# ifdef _WIN32	2572	# ifdef _WIN32
2415	# undef lstat	2573	# undef lstat
2416	# define lstat(a,b) _stati64 (a,b)	2574	# define lstat(a,b) _stati64 (a,b)
2417	# endif	2575	# endif
2418		2576
2419	#define DEF_STAT_INTERVAL 5.0074891	2577	#define DEF_STAT_INTERVAL 5.0074891
		2578	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2420	#define MIN_STAT_INTERVAL 0.1074891	2579	#define MIN_STAT_INTERVAL 0.1074891
2421		2580
2422	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2581	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2423		2582
2424	#if EV_USE_INOTIFY	2583	#if EV_USE_INOTIFY
2425	# define EV_INOTIFY_BUFSIZE 8192	2584	# define EV_INOTIFY_BUFSIZE 8192
…		…
2429	{	2588	{
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);	2589	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		2590
2432	if (w->wd < 0)	2591	if (w->wd < 0)
2433	{	2592	{
		2593	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 */	2594	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2435		2595
2436	/* monitor some parent directory for speedup hints */	2596	/* monitor some parent directory for speedup hints */
2437	/* note that exceeding the hardcoded limit is not a correctness issue, */	2597	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2438	/* but an efficiency issue only */	2598	/* but an efficiency issue only */
2439	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2599	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2440	{	2600	{
2441	char path [4096];	2601	char path [4096];
2442	strcpy (path, w->path);	2602	strcpy (path, w->path);
…		…
2446	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2606	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2447	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2607	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2448		2608
2449	char *pend = strrchr (path, '/');	2609	char *pend = strrchr (path, '/');
2450		2610
2451	if (!pend)	2611	if (!pend || pend == path)
2452	break; /* whoops, no '/', complain to your admin */	2612	break;
2453		2613
2454	*pend = 0;	2614	*pend = 0;
2455	w->wd = inotify_add_watch (fs_fd, path, mask);	2615	w->wd = inotify_add_watch (fs_fd, path, mask);
2456	}	2616	}
2457	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2617	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2458	}	2618	}
2459	}	2619	}
2460	else
2461	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2462		2620
2463	if (w->wd >= 0)	2621	if (w->wd >= 0)
		2622	{
2464	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2623	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2624
		2625	/* now local changes will be tracked by inotify, but remote changes won't */
		2626	/* unless the filesystem it known to be local, we therefore still poll */
		2627	/* also do poll on <2.6.25, but with normal frequency */
		2628	struct statfs sfs;
		2629
		2630	if (fs_2625 && !statfs (w->path, &sfs))
		2631	if (sfs.f_type == 0x1373 /* devfs */
		2632	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2633	|| sfs.f_type == 0x3153464a /* jfs */
		2634	|| sfs.f_type == 0x52654973 /* reiser3 */
		2635	|| sfs.f_type == 0x01021994 /* tempfs */
		2636	|| sfs.f_type == 0x58465342 /* xfs */)
		2637	return;
		2638
		2639	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2640	ev_timer_again (EV_A_ &w->timer);
		2641	}
2465	}	2642	}
2466		2643
2467	static void noinline	2644	static void noinline
2468	infy_del (EV_P_ ev_stat *w)	2645	infy_del (EV_P_ ev_stat *w)
2469	{	2646	{
…		…
2499		2676
2500	if (w->wd == wd || wd == -1)	2677	if (w->wd == wd || wd == -1)
2501	{	2678	{
2502	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2679	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2503	{	2680	{
		2681	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2504	w->wd = -1;	2682	w->wd = -1;
2505	infy_add (EV_A_ w); /* re-add, no matter what */	2683	infy_add (EV_A_ w); /* re-add, no matter what */
2506	}	2684	}
2507		2685
2508	stat_timer_cb (EV_A_ &w->timer, 0);	2686	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2521		2699
2522	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2700	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2523	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2701	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2524	}	2702	}
2525		2703
2526	void inline_size	2704	inline_size void
2527	infy_init (EV_P)	2705	check_2625 (EV_P)
2528	{	2706	{
2529	if (fs_fd != -2)
2530	return;
2531
2532	/* kernels < 2.6.25 are borked	2707	/* kernels < 2.6.25 are borked
2533	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2708	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2534	*/	2709	*/
2535	{
2536	struct utsname buf;	2710	struct utsname buf;
2537	int major, minor, micro;	2711	int major, minor, micro;
2538		2712
2539	fs_fd = -1;
2540
2541	if (uname (&buf))	2713	if (uname (&buf))
2542	return;	2714	return;
2543		2715
2544	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2716	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2545	return;	2717	return;
2546		2718
2547	if (major < 2	2719	if (major < 2
2548	|| (major == 2 && minor < 6)	2720	|| (major == 2 && minor < 6)
2549	|| (major == 2 && minor == 6 && micro < 25))	2721	|| (major == 2 && minor == 6 && micro < 25))
2550	return;	2722	return;
2551	}	2723
		2724	fs_2625 = 1;
		2725	}
		2726
		2727	inline_size void
		2728	infy_init (EV_P)
		2729	{
		2730	if (fs_fd != -2)
		2731	return;
		2732
		2733	fs_fd = -1;
		2734
		2735	check_2625 (EV_A);
2552		2736
2553	fs_fd = inotify_init ();	2737	fs_fd = inotify_init ();
2554		2738
2555	if (fs_fd >= 0)	2739	if (fs_fd >= 0)
2556	{	2740	{
…		…
2558	ev_set_priority (&fs_w, EV_MAXPRI);	2742	ev_set_priority (&fs_w, EV_MAXPRI);
2559	ev_io_start (EV_A_ &fs_w);	2743	ev_io_start (EV_A_ &fs_w);
2560	}	2744	}
2561	}	2745	}
2562		2746
2563	void inline_size	2747	inline_size void
2564	infy_fork (EV_P)	2748	infy_fork (EV_P)
2565	{	2749	{
2566	int slot;	2750	int slot;
2567		2751
2568	if (fs_fd < 0)	2752	if (fs_fd < 0)
…		…
2584	w->wd = -1;	2768	w->wd = -1;
2585		2769
2586	if (fs_fd >= 0)	2770	if (fs_fd >= 0)
2587	infy_add (EV_A_ w); /* re-add, no matter what */	2771	infy_add (EV_A_ w); /* re-add, no matter what */
2588	else	2772	else
2589	ev_timer_start (EV_A_ &w->timer);	2773	ev_timer_again (EV_A_ &w->timer);
2590	}	2774	}
2591	}	2775	}
2592	}	2776	}
2593		2777
2594	#endif	2778	#endif
…		…
2649	ev_stat_start (EV_P_ ev_stat *w)	2833	ev_stat_start (EV_P_ ev_stat *w)
2650	{	2834	{
2651	if (expect_false (ev_is_active (w)))	2835	if (expect_false (ev_is_active (w)))
2652	return;	2836	return;
2653		2837
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);	2838	ev_stat_stat (EV_A_ w);
2659		2839
		2840	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2660	if (w->interval < MIN_STAT_INTERVAL)	2841	w->interval = MIN_STAT_INTERVAL;
2661	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2662		2842
2663	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2843	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));	2844	ev_set_priority (&w->timer, ev_priority (w));
2665		2845
2666	#if EV_USE_INOTIFY	2846	#if EV_USE_INOTIFY
2667	infy_init (EV_A);	2847	infy_init (EV_A);
2668		2848
2669	if (fs_fd >= 0)	2849	if (fs_fd >= 0)
2670	infy_add (EV_A_ w);	2850	infy_add (EV_A_ w);
2671	else	2851	else
2672	#endif	2852	#endif
2673	ev_timer_start (EV_A_ &w->timer);	2853	ev_timer_again (EV_A_ &w->timer);
2674		2854
2675	ev_start (EV_A_ (W)w, 1);	2855	ev_start (EV_A_ (W)w, 1);
2676		2856
2677	EV_FREQUENT_CHECK;	2857	EV_FREQUENT_CHECK;
2678	}	2858	}
…		…
2853	static void	3033	static void
2854	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3034	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2855	{	3035	{
2856	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3036	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2857		3037
		3038	ev_embed_stop (EV_A_ w);
		3039
2858	{	3040	{
2859	struct ev_loop *loop = w->other;	3041	struct ev_loop *loop = w->other;
2860		3042
2861	ev_loop_fork (EV_A);	3043	ev_loop_fork (EV_A);
		3044	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2862	}	3045	}
		3046
		3047	ev_embed_start (EV_A_ w);
2863	}	3048	}
2864		3049
2865	#if 0	3050	#if 0
2866	static void	3051	static void
2867	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3052	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2876	if (expect_false (ev_is_active (w)))	3061	if (expect_false (ev_is_active (w)))
2877	return;	3062	return;
2878		3063
2879	{	3064	{
2880	struct ev_loop *loop = w->other;	3065	struct ev_loop *loop = w->other;
2881	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3066	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);	3067	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2883	}	3068	}
2884		3069
2885	EV_FREQUENT_CHECK;	3070	EV_FREQUENT_CHECK;
2886		3071
…		…
3069	ev_timer_set (&once->to, timeout, 0.);	3254	ev_timer_set (&once->to, timeout, 0.);
3070	ev_timer_start (EV_A_ &once->to);	3255	ev_timer_start (EV_A_ &once->to);
3071	}	3256	}
3072	}	3257	}
3073		3258
		3259	/*****************************************************************************/
		3260
		3261	#if EV_WALK_ENABLE
		3262	void
		3263	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3264	{
		3265	int i, j;
		3266	ev_watcher_list *wl, *wn;
		3267
		3268	if (types & (EV_IO | EV_EMBED))
		3269	for (i = 0; i < anfdmax; ++i)
		3270	for (wl = anfds [i].head; wl; )
		3271	{
		3272	wn = wl->next;
		3273
		3274	#if EV_EMBED_ENABLE
		3275	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3276	{
		3277	if (types & EV_EMBED)
		3278	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3279	}
		3280	else
		3281	#endif
		3282	#if EV_USE_INOTIFY
		3283	if (ev_cb ((ev_io *)wl) == infy_cb)
		3284	;
		3285	else
		3286	#endif
		3287	if ((ev_io *)wl != &pipe_w)
		3288	if (types & EV_IO)
		3289	cb (EV_A_ EV_IO, wl);
		3290
		3291	wl = wn;
		3292	}
		3293
		3294	if (types & (EV_TIMER | EV_STAT))
		3295	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3296	#if EV_STAT_ENABLE
		3297	/*TODO: timer is not always active*/
		3298	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3299	{
		3300	if (types & EV_STAT)
		3301	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3302	}
		3303	else
		3304	#endif
		3305	if (types & EV_TIMER)
		3306	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3307
		3308	#if EV_PERIODIC_ENABLE
		3309	if (types & EV_PERIODIC)
		3310	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3311	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3312	#endif
		3313
		3314	#if EV_IDLE_ENABLE
		3315	if (types & EV_IDLE)
		3316	for (j = NUMPRI; i--; )
		3317	for (i = idlecnt [j]; i--; )
		3318	cb (EV_A_ EV_IDLE, idles [j][i]);
		3319	#endif
		3320
		3321	#if EV_FORK_ENABLE
		3322	if (types & EV_FORK)
		3323	for (i = forkcnt; i--; )
		3324	if (ev_cb (forks [i]) != embed_fork_cb)
		3325	cb (EV_A_ EV_FORK, forks [i]);
		3326	#endif
		3327
		3328	#if EV_ASYNC_ENABLE
		3329	if (types & EV_ASYNC)
		3330	for (i = asynccnt; i--; )
		3331	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3332	#endif
		3333
		3334	if (types & EV_PREPARE)
		3335	for (i = preparecnt; i--; )
		3336	#if EV_EMBED_ENABLE
		3337	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3338	#endif
		3339	cb (EV_A_ EV_PREPARE, prepares [i]);
		3340
		3341	if (types & EV_CHECK)
		3342	for (i = checkcnt; i--; )
		3343	cb (EV_A_ EV_CHECK, checks [i]);
		3344
		3345	if (types & EV_SIGNAL)
		3346	for (i = 0; i < signalmax; ++i)
		3347	for (wl = signals [i].head; wl; )
		3348	{
		3349	wn = wl->next;
		3350	cb (EV_A_ EV_SIGNAL, wl);
		3351	wl = wn;
		3352	}
		3353
		3354	if (types & EV_CHILD)
		3355	for (i = EV_PID_HASHSIZE; i--; )
		3356	for (wl = childs [i]; wl; )
		3357	{
		3358	wn = wl->next;
		3359	cb (EV_A_ EV_CHILD, wl);
		3360	wl = wn;
		3361	}
		3362	/* EV_STAT 0x00001000 /* stat data changed */
		3363	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3364	}
		3365	#endif
		3366
3074	#if EV_MULTIPLICITY	3367	#if EV_MULTIPLICITY
3075	#include "ev_wrap.h"	3368	#include "ev_wrap.h"
3076	#endif	3369	#endif
3077		3370
3078	#ifdef __cplusplus	3371	#ifdef __cplusplus

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