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Comparing libev/ev.c (file contents):
Revision 1.272 by root, Mon Nov 3 12:17:40 2008 UTC vs.
Revision 1.291 by root, Mon Jun 29 04:44:18 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)
…		…
523		568
524	ev_tstamp	569	ev_tstamp
525	ev_time (void)	570	ev_time (void)
526	{	571	{
527	#if EV_USE_REALTIME	572	#if EV_USE_REALTIME
		573	if (expect_true (have_realtime))
		574	{
528	struct timespec ts;	575	struct timespec ts;
529	clock_gettime (CLOCK_REALTIME, &ts);	576	clock_gettime (CLOCK_REALTIME, &ts);
530	return ts.tv_sec + ts.tv_nsec * 1e-9;	577	return ts.tv_sec + ts.tv_nsec * 1e-9;
531	#else	578	}
		579	#endif
		580
532	struct timeval tv;	581	struct timeval tv;
533	gettimeofday (&tv, 0);	582	gettimeofday (&tv, 0);
534	return tv.tv_sec + tv.tv_usec * 1e-6;	583	return tv.tv_sec + tv.tv_usec * 1e-6;
535	#endif
536	}	584	}
537		585
538	ev_tstamp inline_size	586	inline_size ev_tstamp
539	get_clock (void)	587	get_clock (void)
540	{	588	{
541	#if EV_USE_MONOTONIC	589	#if EV_USE_MONOTONIC
542	if (expect_true (have_monotonic))	590	if (expect_true (have_monotonic))
543	{	591	{
…		…
588		636
589	/*****************************************************************************/	637	/*****************************************************************************/
590		638
591	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	639	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
592		640
593	int inline_size	641	/* find a suitable new size for the given array, */
		642	/* hopefully by rounding to a ncie-to-malloc size */
		643	inline_size int
594	array_nextsize (int elem, int cur, int cnt)	644	array_nextsize (int elem, int cur, int cnt)
595	{	645	{
596	int ncur = cur + 1;	646	int ncur = cur + 1;
597		647
598	do	648	do
…		…
639	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	689	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
640	}	690	}
641	#endif	691	#endif
642		692
643	#define array_free(stem, idx) \	693	#define array_free(stem, idx) \
644	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	694	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
645		695
646	/*****************************************************************************/	696	/*****************************************************************************/
		697
		698	/* dummy callback for pending events */
		699	static void noinline
		700	pendingcb (EV_P_ ev_prepare *w, int revents)
		701	{
		702	}
647		703
648	void noinline	704	void noinline
649	ev_feed_event (EV_P_ void *w, int revents)	705	ev_feed_event (EV_P_ void *w, int revents)
650	{	706	{
651	W w_ = (W)w;	707	W w_ = (W)w;
…		…
660	pendings [pri][w_->pending - 1].w = w_;	716	pendings [pri][w_->pending - 1].w = w_;
661	pendings [pri][w_->pending - 1].events = revents;	717	pendings [pri][w_->pending - 1].events = revents;
662	}	718	}
663	}	719	}
664		720
665	void inline_speed	721	inline_speed void
		722	feed_reverse (EV_P_ W w)
		723	{
		724	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		725	rfeeds [rfeedcnt++] = w;
		726	}
		727
		728	inline_size void
		729	feed_reverse_done (EV_P_ int revents)
		730	{
		731	do
		732	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		733	while (rfeedcnt);
		734	}
		735
		736	inline_speed void
666	queue_events (EV_P_ W *events, int eventcnt, int type)	737	queue_events (EV_P_ W *events, int eventcnt, int type)
667	{	738	{
668	int i;	739	int i;
669		740
670	for (i = 0; i < eventcnt; ++i)	741	for (i = 0; i < eventcnt; ++i)
671	ev_feed_event (EV_A_ events [i], type);	742	ev_feed_event (EV_A_ events [i], type);
672	}	743	}
673		744
674	/*****************************************************************************/	745	/*****************************************************************************/
675		746
676	void inline_speed	747	inline_speed void
677	fd_event (EV_P_ int fd, int revents)	748	fd_event (EV_P_ int fd, int revents)
678	{	749	{
679	ANFD *anfd = anfds + fd;	750	ANFD *anfd = anfds + fd;
680	ev_io *w;	751	ev_io *w;
681		752
…		…
693	{	764	{
694	if (fd >= 0 && fd < anfdmax)	765	if (fd >= 0 && fd < anfdmax)
695	fd_event (EV_A_ fd, revents);	766	fd_event (EV_A_ fd, revents);
696	}	767	}
697		768
698	void inline_size	769	/* make sure the external fd watch events are in-sync */
		770	/* with the kernel/libev internal state */
		771	inline_size void
699	fd_reify (EV_P)	772	fd_reify (EV_P)
700	{	773	{
701	int i;	774	int i;
702		775
703	for (i = 0; i < fdchangecnt; ++i)	776	for (i = 0; i < fdchangecnt; ++i)
…		…
718	#ifdef EV_FD_TO_WIN32_HANDLE	791	#ifdef EV_FD_TO_WIN32_HANDLE
719	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	792	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
720	#else	793	#else
721	anfd->handle = _get_osfhandle (fd);	794	anfd->handle = _get_osfhandle (fd);
722	#endif	795	#endif
723	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	796	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
724	}	797	}
725	#endif	798	#endif
726		799
727	{	800	{
728	unsigned char o_events = anfd->events;	801	unsigned char o_events = anfd->events;
729	unsigned char o_reify = anfd->reify;	802	unsigned char o_reify = anfd->reify;
730		803
731	anfd->reify = 0;	804	anfd->reify = 0;
732	anfd->events = events;	805	anfd->events = events;
733		806
734	if (o_events != events || o_reify & EV_IOFDSET)	807	if (o_events != events || o_reify & EV__IOFDSET)
735	backend_modify (EV_A_ fd, o_events, events);	808	backend_modify (EV_A_ fd, o_events, events);
736	}	809	}
737	}	810	}
738		811
739	fdchangecnt = 0;	812	fdchangecnt = 0;
740	}	813	}
741		814
742	void inline_size	815	/* something about the given fd changed */
		816	inline_size void
743	fd_change (EV_P_ int fd, int flags)	817	fd_change (EV_P_ int fd, int flags)
744	{	818	{
745	unsigned char reify = anfds [fd].reify;	819	unsigned char reify = anfds [fd].reify;
746	anfds [fd].reify |= flags;	820	anfds [fd].reify |= flags;
747		821
…		…
751	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	825	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
752	fdchanges [fdchangecnt - 1] = fd;	826	fdchanges [fdchangecnt - 1] = fd;
753	}	827	}
754	}	828	}
755		829
756	void inline_speed	830	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		831	inline_speed void
757	fd_kill (EV_P_ int fd)	832	fd_kill (EV_P_ int fd)
758	{	833	{
759	ev_io *w;	834	ev_io *w;
760		835
761	while ((w = (ev_io *)anfds [fd].head))	836	while ((w = (ev_io *)anfds [fd].head))
…		…
763	ev_io_stop (EV_A_ w);	838	ev_io_stop (EV_A_ w);
764	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	839	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
765	}	840	}
766	}	841	}
767		842
768	int inline_size	843	/* check whether the given fd is atcually valid, for error recovery */
		844	inline_size int
769	fd_valid (int fd)	845	fd_valid (int fd)
770	{	846	{
771	#ifdef _WIN32	847	#ifdef _WIN32
772	return _get_osfhandle (fd) != -1;	848	return _get_osfhandle (fd) != -1;
773	#else	849	#else
…		…
810	for (fd = 0; fd < anfdmax; ++fd)	886	for (fd = 0; fd < anfdmax; ++fd)
811	if (anfds [fd].events)	887	if (anfds [fd].events)
812	{	888	{
813	anfds [fd].events = 0;	889	anfds [fd].events = 0;
814	anfds [fd].emask = 0;	890	anfds [fd].emask = 0;
815	fd_change (EV_A_ fd, EV_IOFDSET | 1);	891	fd_change (EV_A_ fd, EV__IOFDSET | 1);
816	}	892	}
817	}	893	}
818		894
819	/*****************************************************************************/	895	/*****************************************************************************/
820		896
…		…
836	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	912	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
837	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	913	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
838	#define UPHEAP_DONE(p,k) ((p) == (k))	914	#define UPHEAP_DONE(p,k) ((p) == (k))
839		915
840	/* away from the root */	916	/* away from the root */
841	void inline_speed	917	inline_speed void
842	downheap (ANHE *heap, int N, int k)	918	downheap (ANHE *heap, int N, int k)
843	{	919	{
844	ANHE he = heap [k];	920	ANHE he = heap [k];
845	ANHE *E = heap + N + HEAP0;	921	ANHE *E = heap + N + HEAP0;
846		922
…		…
886	#define HEAP0 1	962	#define HEAP0 1
887	#define HPARENT(k) ((k) >> 1)	963	#define HPARENT(k) ((k) >> 1)
888	#define UPHEAP_DONE(p,k) (!(p))	964	#define UPHEAP_DONE(p,k) (!(p))
889		965
890	/* away from the root */	966	/* away from the root */
891	void inline_speed	967	inline_speed void
892	downheap (ANHE *heap, int N, int k)	968	downheap (ANHE *heap, int N, int k)
893	{	969	{
894	ANHE he = heap [k];	970	ANHE he = heap [k];
895		971
896	for (;;)	972	for (;;)
…		…
916	ev_active (ANHE_w (he)) = k;	992	ev_active (ANHE_w (he)) = k;
917	}	993	}
918	#endif	994	#endif
919		995
920	/* towards the root */	996	/* towards the root */
921	void inline_speed	997	inline_speed void
922	upheap (ANHE *heap, int k)	998	upheap (ANHE *heap, int k)
923	{	999	{
924	ANHE he = heap [k];	1000	ANHE he = heap [k];
925		1001
926	for (;;)	1002	for (;;)
…		…
937		1013
938	heap [k] = he;	1014	heap [k] = he;
939	ev_active (ANHE_w (he)) = k;	1015	ev_active (ANHE_w (he)) = k;
940	}	1016	}
941		1017
942	void inline_size	1018	/* move an element suitably so it is in a correct place */
		1019	inline_size void
943	adjustheap (ANHE *heap, int N, int k)	1020	adjustheap (ANHE *heap, int N, int k)
944	{	1021	{
945	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1022	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
946	upheap (heap, k);	1023	upheap (heap, k);
947	else	1024	else
948	downheap (heap, N, k);	1025	downheap (heap, N, k);
949	}	1026	}
950		1027
951	/* rebuild the heap: this function is used only once and executed rarely */	1028	/* rebuild the heap: this function is used only once and executed rarely */
952	void inline_size	1029	inline_size void
953	reheap (ANHE *heap, int N)	1030	reheap (ANHE *heap, int N)
954	{	1031	{
955	int i;	1032	int i;
956		1033
957	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1034	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
960	upheap (heap, i + HEAP0);	1037	upheap (heap, i + HEAP0);
961	}	1038	}
962		1039
963	/*****************************************************************************/	1040	/*****************************************************************************/
964		1041
		1042	/* associate signal watchers to a signal signal */
965	typedef struct	1043	typedef struct
966	{	1044	{
967	WL head;	1045	WL head;
968	EV_ATOMIC_T gotsig;	1046	EV_ATOMIC_T gotsig;
969	} ANSIG;	1047	} ANSIG;
…		…
973		1051
974	static EV_ATOMIC_T gotsig;	1052	static EV_ATOMIC_T gotsig;
975		1053
976	/*****************************************************************************/	1054	/*****************************************************************************/
977		1055
978	void inline_speed	1056	/* used to prepare libev internal fd's */
		1057	/* this is not fork-safe */
		1058	inline_speed void
979	fd_intern (int fd)	1059	fd_intern (int fd)
980	{	1060	{
981	#ifdef _WIN32	1061	#ifdef _WIN32
982	unsigned long arg = 1;	1062	unsigned long arg = 1;
983	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1063	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
988	}	1068	}
989		1069
990	static void noinline	1070	static void noinline
991	evpipe_init (EV_P)	1071	evpipe_init (EV_P)
992	{	1072	{
993	if (!ev_is_active (&pipeev))	1073	if (!ev_is_active (&pipe_w))
994	{	1074	{
995	#if EV_USE_EVENTFD	1075	#if EV_USE_EVENTFD
996	if ((evfd = eventfd (0, 0)) >= 0)	1076	if ((evfd = eventfd (0, 0)) >= 0)
997	{	1077	{
998	evpipe [0] = -1;	1078	evpipe [0] = -1;
999	fd_intern (evfd);	1079	fd_intern (evfd);
1000	ev_io_set (&pipeev, evfd, EV_READ);	1080	ev_io_set (&pipe_w, evfd, EV_READ);
1001	}	1081	}
1002	else	1082	else
1003	#endif	1083	#endif
1004	{	1084	{
1005	while (pipe (evpipe))	1085	while (pipe (evpipe))
1006	ev_syserr ("(libev) error creating signal/async pipe");	1086	ev_syserr ("(libev) error creating signal/async pipe");
1007		1087
1008	fd_intern (evpipe [0]);	1088	fd_intern (evpipe [0]);
1009	fd_intern (evpipe [1]);	1089	fd_intern (evpipe [1]);
1010	ev_io_set (&pipeev, evpipe [0], EV_READ);	1090	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1011	}	1091	}
1012		1092
1013	ev_io_start (EV_A_ &pipeev);	1093	ev_io_start (EV_A_ &pipe_w);
1014	ev_unref (EV_A); /* watcher should not keep loop alive */	1094	ev_unref (EV_A); /* watcher should not keep loop alive */
1015	}	1095	}
1016	}	1096	}
1017		1097
1018	void inline_size	1098	inline_size void
1019	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1099	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1020	{	1100	{
1021	if (!*flag)	1101	if (!*flag)
1022	{	1102	{
1023	int old_errno = errno; /* save errno because write might clobber it */	1103	int old_errno = errno; /* save errno because write might clobber it */
…		…
1036		1116
1037	errno = old_errno;	1117	errno = old_errno;
1038	}	1118	}
1039	}	1119	}
1040		1120
		1121	/* called whenever the libev signal pipe */
		1122	/* got some events (signal, async) */
1041	static void	1123	static void
1042	pipecb (EV_P_ ev_io *iow, int revents)	1124	pipecb (EV_P_ ev_io *iow, int revents)
1043	{	1125	{
1044	#if EV_USE_EVENTFD	1126	#if EV_USE_EVENTFD
1045	if (evfd >= 0)	1127	if (evfd >= 0)
…		…
1101	ev_feed_signal_event (EV_P_ int signum)	1183	ev_feed_signal_event (EV_P_ int signum)
1102	{	1184	{
1103	WL w;	1185	WL w;
1104		1186
1105	#if EV_MULTIPLICITY	1187	#if EV_MULTIPLICITY
1106	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1188	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1107	#endif	1189	#endif
1108		1190
1109	--signum;	1191	--signum;
1110		1192
1111	if (signum < 0 || signum >= signalmax)	1193	if (signum < 0 || signum >= signalmax)
…		…
1127		1209
1128	#ifndef WIFCONTINUED	1210	#ifndef WIFCONTINUED
1129	# define WIFCONTINUED(status) 0	1211	# define WIFCONTINUED(status) 0
1130	#endif	1212	#endif
1131		1213
1132	void inline_speed	1214	/* handle a single child status event */
		1215	inline_speed void
1133	child_reap (EV_P_ int chain, int pid, int status)	1216	child_reap (EV_P_ int chain, int pid, int status)
1134	{	1217	{
1135	ev_child *w;	1218	ev_child *w;
1136	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1219	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1137		1220
…		…
1150		1233
1151	#ifndef WCONTINUED	1234	#ifndef WCONTINUED
1152	# define WCONTINUED 0	1235	# define WCONTINUED 0
1153	#endif	1236	#endif
1154		1237
		1238	/* called on sigchld etc., calls waitpid */
1155	static void	1239	static void
1156	childcb (EV_P_ ev_signal *sw, int revents)	1240	childcb (EV_P_ ev_signal *sw, int revents)
1157	{	1241	{
1158	int pid, status;	1242	int pid, status;
1159		1243
…		…
1240	/* kqueue is borked on everything but netbsd apparently */	1324	/* kqueue is borked on everything but netbsd apparently */
1241	/* it usually doesn't work correctly on anything but sockets and pipes */	1325	/* it usually doesn't work correctly on anything but sockets and pipes */
1242	flags &= ~EVBACKEND_KQUEUE;	1326	flags &= ~EVBACKEND_KQUEUE;
1243	#endif	1327	#endif
1244	#ifdef __APPLE__	1328	#ifdef __APPLE__
1245	// flags &= ~EVBACKEND_KQUEUE; for documentation	1329	/* only select works correctly on that "unix-certified" platform */
1246	flags &= ~EVBACKEND_POLL;	1330	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1331	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1247	#endif	1332	#endif
1248		1333
1249	return flags;	1334	return flags;
1250	}	1335	}
1251		1336
…		…
1283	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1368	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1284	{	1369	{
1285	timeout_blocktime = interval;	1370	timeout_blocktime = interval;
1286	}	1371	}
1287		1372
		1373	/* initialise a loop structure, must be zero-initialised */
1288	static void noinline	1374	static void noinline
1289	loop_init (EV_P_ unsigned int flags)	1375	loop_init (EV_P_ unsigned int flags)
1290	{	1376	{
1291	if (!backend)	1377	if (!backend)
1292	{	1378	{
		1379	#if EV_USE_REALTIME
		1380	if (!have_realtime)
		1381	{
		1382	struct timespec ts;
		1383
		1384	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1385	have_realtime = 1;
		1386	}
		1387	#endif
		1388
1293	#if EV_USE_MONOTONIC	1389	#if EV_USE_MONOTONIC
		1390	if (!have_monotonic)
1294	{	1391	{
1295	struct timespec ts;	1392	struct timespec ts;
		1393
1296	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1394	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1297	have_monotonic = 1;	1395	have_monotonic = 1;
1298	}	1396	}
1299	#endif	1397	#endif
1300		1398
1301	ev_rt_now = ev_time ();	1399	ev_rt_now = ev_time ();
1302	mn_now = get_clock ();	1400	mn_now = get_clock ();
1303	now_floor = mn_now;	1401	now_floor = mn_now;
…		…
1340	#endif	1438	#endif
1341	#if EV_USE_SELECT	1439	#if EV_USE_SELECT
1342	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1440	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1343	#endif	1441	#endif
1344		1442
		1443	ev_prepare_init (&pending_w, pendingcb);
		1444
1345	ev_init (&pipeev, pipecb);	1445	ev_init (&pipe_w, pipecb);
1346	ev_set_priority (&pipeev, EV_MAXPRI);	1446	ev_set_priority (&pipe_w, EV_MAXPRI);
1347	}	1447	}
1348	}	1448	}
1349		1449
		1450	/* free up a loop structure */
1350	static void noinline	1451	static void noinline
1351	loop_destroy (EV_P)	1452	loop_destroy (EV_P)
1352	{	1453	{
1353	int i;	1454	int i;
1354		1455
1355	if (ev_is_active (&pipeev))	1456	if (ev_is_active (&pipe_w))
1356	{	1457	{
1357	ev_ref (EV_A); /* signal watcher */	1458	ev_ref (EV_A); /* signal watcher */
1358	ev_io_stop (EV_A_ &pipeev);	1459	ev_io_stop (EV_A_ &pipe_w);
1359		1460
1360	#if EV_USE_EVENTFD	1461	#if EV_USE_EVENTFD
1361	if (evfd >= 0)	1462	if (evfd >= 0)
1362	close (evfd);	1463	close (evfd);
1363	#endif	1464	#endif
…		…
1402	}	1503	}
1403		1504
1404	ev_free (anfds); anfdmax = 0;	1505	ev_free (anfds); anfdmax = 0;
1405		1506
1406	/* have to use the microsoft-never-gets-it-right macro */	1507	/* have to use the microsoft-never-gets-it-right macro */
		1508	array_free (rfeed, EMPTY);
1407	array_free (fdchange, EMPTY);	1509	array_free (fdchange, EMPTY);
1408	array_free (timer, EMPTY);	1510	array_free (timer, EMPTY);
1409	#if EV_PERIODIC_ENABLE	1511	#if EV_PERIODIC_ENABLE
1410	array_free (periodic, EMPTY);	1512	array_free (periodic, EMPTY);
1411	#endif	1513	#endif
…		…
1420		1522
1421	backend = 0;	1523	backend = 0;
1422	}	1524	}
1423		1525
1424	#if EV_USE_INOTIFY	1526	#if EV_USE_INOTIFY
1425	void inline_size infy_fork (EV_P);	1527	inline_size void infy_fork (EV_P);
1426	#endif	1528	#endif
1427		1529
1428	void inline_size	1530	inline_size void
1429	loop_fork (EV_P)	1531	loop_fork (EV_P)
1430	{	1532	{
1431	#if EV_USE_PORT	1533	#if EV_USE_PORT
1432	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1534	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1433	#endif	1535	#endif
…		…
1439	#endif	1541	#endif
1440	#if EV_USE_INOTIFY	1542	#if EV_USE_INOTIFY
1441	infy_fork (EV_A);	1543	infy_fork (EV_A);
1442	#endif	1544	#endif
1443		1545
1444	if (ev_is_active (&pipeev))	1546	if (ev_is_active (&pipe_w))
1445	{	1547	{
1446	/* this "locks" the handlers against writing to the pipe */	1548	/* this "locks" the handlers against writing to the pipe */
1447	/* while we modify the fd vars */	1549	/* while we modify the fd vars */
1448	gotsig = 1;	1550	gotsig = 1;
1449	#if EV_ASYNC_ENABLE	1551	#if EV_ASYNC_ENABLE
1450	gotasync = 1;	1552	gotasync = 1;
1451	#endif	1553	#endif
1452		1554
1453	ev_ref (EV_A);	1555	ev_ref (EV_A);
1454	ev_io_stop (EV_A_ &pipeev);	1556	ev_io_stop (EV_A_ &pipe_w);
1455		1557
1456	#if EV_USE_EVENTFD	1558	#if EV_USE_EVENTFD
1457	if (evfd >= 0)	1559	if (evfd >= 0)
1458	close (evfd);	1560	close (evfd);
1459	#endif	1561	#endif
…		…
1464	close (evpipe [1]);	1566	close (evpipe [1]);
1465	}	1567	}
1466		1568
1467	evpipe_init (EV_A);	1569	evpipe_init (EV_A);
1468	/* now iterate over everything, in case we missed something */	1570	/* now iterate over everything, in case we missed something */
1469	pipecb (EV_A_ &pipeev, EV_READ);	1571	pipecb (EV_A_ &pipe_w, EV_READ);
1470	}	1572	}
1471		1573
1472	postfork = 0;	1574	postfork = 0;
1473	}	1575	}
1474		1576
…		…
1504		1606
1505	#if EV_VERIFY	1607	#if EV_VERIFY
1506	static void noinline	1608	static void noinline
1507	verify_watcher (EV_P_ W w)	1609	verify_watcher (EV_P_ W w)
1508	{	1610	{
1509	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1611	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1510		1612
1511	if (w->pending)	1613	if (w->pending)
1512	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	1614	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1513	}	1615	}
1514		1616
1515	static void noinline	1617	static void noinline
1516	verify_heap (EV_P_ ANHE *heap, int N)	1618	verify_heap (EV_P_ ANHE *heap, int N)
1517	{	1619	{
1518	int i;	1620	int i;
1519		1621
1520	for (i = HEAP0; i < N + HEAP0; ++i)	1622	for (i = HEAP0; i < N + HEAP0; ++i)
1521	{	1623	{
1522	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));	1624	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])));	1625	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]))));	1626	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1525		1627
1526	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1628	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1527	}	1629	}
1528	}	1630	}
1529		1631
1530	static void noinline	1632	static void noinline
1531	array_verify (EV_P_ W *ws, int cnt)	1633	array_verify (EV_P_ W *ws, int cnt)
1532	{	1634	{
1533	while (cnt--)	1635	while (cnt--)
1534	{	1636	{
1535	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1637	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1536	verify_watcher (EV_A_ ws [cnt]);	1638	verify_watcher (EV_A_ ws [cnt]);
1537	}	1639	}
1538	}	1640	}
1539	#endif	1641	#endif
1540		1642
…		…
1547		1649
1548	assert (activecnt >= -1);	1650	assert (activecnt >= -1);
1549		1651
1550	assert (fdchangemax >= fdchangecnt);	1652	assert (fdchangemax >= fdchangecnt);
1551	for (i = 0; i < fdchangecnt; ++i)	1653	for (i = 0; i < fdchangecnt; ++i)
1552	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1654	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1553		1655
1554	assert (anfdmax >= 0);	1656	assert (anfdmax >= 0);
1555	for (i = 0; i < anfdmax; ++i)	1657	for (i = 0; i < anfdmax; ++i)
1556	for (w = anfds [i].head; w; w = w->next)	1658	for (w = anfds [i].head; w; w = w->next)
1557	{	1659	{
1558	verify_watcher (EV_A_ (W)w);	1660	verify_watcher (EV_A_ (W)w);
1559	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1661	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));	1662	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1561	}	1663	}
1562		1664
1563	assert (timermax >= timercnt);	1665	assert (timermax >= timercnt);
1564	verify_heap (EV_A_ timers, timercnt);	1666	verify_heap (EV_A_ timers, timercnt);
1565		1667
…		…
1670	ev_invoke (EV_P_ void *w, int revents)	1772	ev_invoke (EV_P_ void *w, int revents)
1671	{	1773	{
1672	EV_CB_INVOKE ((W)w, revents);	1774	EV_CB_INVOKE ((W)w, revents);
1673	}	1775	}
1674		1776
1675	void inline_speed	1777	inline_speed void
1676	call_pending (EV_P)	1778	call_pending (EV_P)
1677	{	1779	{
1678	int pri;	1780	int pri;
1679		1781
1680	for (pri = NUMPRI; pri--; )	1782	for (pri = NUMPRI; pri--; )
1681	while (pendingcnt [pri])	1783	while (pendingcnt [pri])
1682	{	1784	{
1683	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1785	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1684		1786
1685	if (expect_true (p->w))
1686	{
1687	/*assert (("non-pending watcher on pending list", p->w->pending));*/	1787	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1788	/* ^ this is no longer true, as pending_w could be here */
1688		1789
1689	p->w->pending = 0;	1790	p->w->pending = 0;
1690	EV_CB_INVOKE (p->w, p->events);	1791	EV_CB_INVOKE (p->w, p->events);
1691	EV_FREQUENT_CHECK;	1792	EV_FREQUENT_CHECK;
1692	}
1693	}	1793	}
1694	}	1794	}
1695		1795
1696	#if EV_IDLE_ENABLE	1796	#if EV_IDLE_ENABLE
1697	void inline_size	1797	/* make idle watchers pending. this handles the "call-idle */
		1798	/* only when higher priorities are idle" logic */
		1799	inline_size void
1698	idle_reify (EV_P)	1800	idle_reify (EV_P)
1699	{	1801	{
1700	if (expect_false (idleall))	1802	if (expect_false (idleall))
1701	{	1803	{
1702	int pri;	1804	int pri;
…		…
1714	}	1816	}
1715	}	1817	}
1716	}	1818	}
1717	#endif	1819	#endif
1718		1820
1719	void inline_size	1821	/* make timers pending */
		1822	inline_size void
1720	timers_reify (EV_P)	1823	timers_reify (EV_P)
1721	{	1824	{
1722	EV_FREQUENT_CHECK;	1825	EV_FREQUENT_CHECK;
1723		1826
1724	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1827	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1725	{	1828	{
1726	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1829	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	{	1830	{
		1831	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1832
		1833	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1834
		1835	/* first reschedule or stop timer */
		1836	if (w->repeat)
		1837	{
1733	ev_at (w) += w->repeat;	1838	ev_at (w) += w->repeat;
1734	if (ev_at (w) < mn_now)	1839	if (ev_at (w) < mn_now)
1735	ev_at (w) = mn_now;	1840	ev_at (w) = mn_now;
1736		1841
1737	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1842	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1738		1843
1739	ANHE_at_cache (timers [HEAP0]);	1844	ANHE_at_cache (timers [HEAP0]);
1740	downheap (timers, timercnt, HEAP0);	1845	downheap (timers, timercnt, HEAP0);
		1846	}
		1847	else
		1848	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1849
		1850	EV_FREQUENT_CHECK;
		1851	feed_reverse (EV_A_ (W)w);
1741	}	1852	}
1742	else	1853	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1743	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1744		1854
1745	EV_FREQUENT_CHECK;
1746	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1855	feed_reverse_done (EV_A_ EV_TIMEOUT);
1747	}	1856	}
1748	}	1857	}
1749		1858
1750	#if EV_PERIODIC_ENABLE	1859	#if EV_PERIODIC_ENABLE
1751	void inline_size	1860	/* make periodics pending */
		1861	inline_size void
1752	periodics_reify (EV_P)	1862	periodics_reify (EV_P)
1753	{	1863	{
1754	EV_FREQUENT_CHECK;	1864	EV_FREQUENT_CHECK;
1755		1865
1756	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1866	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1757	{	1867	{
1758	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1868	int feed_count = 0;
1759		1869
1760	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1870	do
1761
1762	/* first reschedule or stop timer */
1763	if (w->reschedule_cb)
1764	{	1871	{
		1872	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1873
		1874	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		1875
		1876	/* first reschedule or stop timer */
		1877	if (w->reschedule_cb)
		1878	{
1765	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1879	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1766		1880
1767	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1881	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1768		1882
1769	ANHE_at_cache (periodics [HEAP0]);	1883	ANHE_at_cache (periodics [HEAP0]);
1770	downheap (periodics, periodiccnt, HEAP0);	1884	downheap (periodics, periodiccnt, HEAP0);
		1885	}
		1886	else if (w->interval)
		1887	{
		1888	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1889	/* if next trigger time is not sufficiently in the future, put it there */
		1890	/* this might happen because of floating point inexactness */
		1891	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1892	{
		1893	ev_at (w) += w->interval;
		1894
		1895	/* if interval is unreasonably low we might still have a time in the past */
		1896	/* so correct this. this will make the periodic very inexact, but the user */
		1897	/* has effectively asked to get triggered more often than possible */
		1898	if (ev_at (w) < ev_rt_now)
		1899	ev_at (w) = ev_rt_now;
		1900	}
		1901
		1902	ANHE_at_cache (periodics [HEAP0]);
		1903	downheap (periodics, periodiccnt, HEAP0);
		1904	}
		1905	else
		1906	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1907
		1908	EV_FREQUENT_CHECK;
		1909	feed_reverse (EV_A_ (W)w);
1771	}	1910	}
1772	else if (w->interval)	1911	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		1912
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);	1913	feed_reverse_done (EV_A_ EV_PERIODIC);
1796	}	1914	}
1797	}	1915	}
1798		1916
		1917	/* simply recalculate all periodics */
		1918	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1799	static void noinline	1919	static void noinline
1800	periodics_reschedule (EV_P)	1920	periodics_reschedule (EV_P)
1801	{	1921	{
1802	int i;	1922	int i;
1803		1923
…		…
1816		1936
1817	reheap (periodics, periodiccnt);	1937	reheap (periodics, periodiccnt);
1818	}	1938	}
1819	#endif	1939	#endif
1820		1940
1821	void inline_speed	1941	/* adjust all timers by a given offset */
		1942	static void noinline
		1943	timers_reschedule (EV_P_ ev_tstamp adjust)
		1944	{
		1945	int i;
		1946
		1947	for (i = 0; i < timercnt; ++i)
		1948	{
		1949	ANHE *he = timers + i + HEAP0;
		1950	ANHE_w (*he)->at += adjust;
		1951	ANHE_at_cache (*he);
		1952	}
		1953	}
		1954
		1955	/* fetch new monotonic and realtime times from the kernel */
		1956	/* also detetc if there was a timejump, and act accordingly */
		1957	inline_speed void
1822	time_update (EV_P_ ev_tstamp max_block)	1958	time_update (EV_P_ ev_tstamp max_block)
1823	{	1959	{
1824	int i;
1825
1826	#if EV_USE_MONOTONIC	1960	#if EV_USE_MONOTONIC
1827	if (expect_true (have_monotonic))	1961	if (expect_true (have_monotonic))
1828	{	1962	{
		1963	int i;
1829	ev_tstamp odiff = rtmn_diff;	1964	ev_tstamp odiff = rtmn_diff;
1830		1965
1831	mn_now = get_clock ();	1966	mn_now = get_clock ();
1832		1967
1833	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1968	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1859	ev_rt_now = ev_time ();	1994	ev_rt_now = ev_time ();
1860	mn_now = get_clock ();	1995	mn_now = get_clock ();
1861	now_floor = mn_now;	1996	now_floor = mn_now;
1862	}	1997	}
1863		1998
		1999	/* no timer adjustment, as the monotonic clock doesn't jump */
		2000	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1864	# if EV_PERIODIC_ENABLE	2001	# if EV_PERIODIC_ENABLE
1865	periodics_reschedule (EV_A);	2002	periodics_reschedule (EV_A);
1866	# endif	2003	# endif
1867	/* no timer adjustment, as the monotonic clock doesn't jump */
1868	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1869	}	2004	}
1870	else	2005	else
1871	#endif	2006	#endif
1872	{	2007	{
1873	ev_rt_now = ev_time ();	2008	ev_rt_now = ev_time ();
1874		2009
1875	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2010	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1876	{	2011	{
		2012	/* adjust timers. this is easy, as the offset is the same for all of them */
		2013	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1877	#if EV_PERIODIC_ENABLE	2014	#if EV_PERIODIC_ENABLE
1878	periodics_reschedule (EV_A);	2015	periodics_reschedule (EV_A);
1879	#endif	2016	#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	}	2017	}
1888		2018
1889	mn_now = ev_rt_now;	2019	mn_now = ev_rt_now;
1890	}	2020	}
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	}	2021	}
1910		2022
1911	static int loop_done;	2023	static int loop_done;
1912		2024
1913	void	2025	void
…		…
1947	{	2059	{
1948	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2060	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1949	call_pending (EV_A);	2061	call_pending (EV_A);
1950	}	2062	}
1951		2063
1952	if (expect_false (!activecnt))
1953	break;
1954
1955	/* we might have forked, so reify kernel state if necessary */	2064	/* we might have forked, so reify kernel state if necessary */
1956	if (expect_false (postfork))	2065	if (expect_false (postfork))
1957	loop_fork (EV_A);	2066	loop_fork (EV_A);
1958		2067
1959	/* update fd-related kernel structures */	2068	/* update fd-related kernel structures */
…		…
2038	ev_unloop (EV_P_ int how)	2147	ev_unloop (EV_P_ int how)
2039	{	2148	{
2040	loop_done = how;	2149	loop_done = how;
2041	}	2150	}
2042		2151
		2152	void
		2153	ev_ref (EV_P)
		2154	{
		2155	++activecnt;
		2156	}
		2157
		2158	void
		2159	ev_unref (EV_P)
		2160	{
		2161	--activecnt;
		2162	}
		2163
		2164	void
		2165	ev_now_update (EV_P)
		2166	{
		2167	time_update (EV_A_ 1e100);
		2168	}
		2169
		2170	void
		2171	ev_suspend (EV_P)
		2172	{
		2173	ev_now_update (EV_A);
		2174	}
		2175
		2176	void
		2177	ev_resume (EV_P)
		2178	{
		2179	ev_tstamp mn_prev = mn_now;
		2180
		2181	ev_now_update (EV_A);
		2182	timers_reschedule (EV_A_ mn_now - mn_prev);
		2183	#if EV_PERIODIC_ENABLE
		2184	/* TODO: really do this? */
		2185	periodics_reschedule (EV_A);
		2186	#endif
		2187	}
		2188
2043	/*****************************************************************************/	2189	/*****************************************************************************/
		2190	/* singly-linked list management, used when the expected list length is short */
2044		2191
2045	void inline_size	2192	inline_size void
2046	wlist_add (WL *head, WL elem)	2193	wlist_add (WL *head, WL elem)
2047	{	2194	{
2048	elem->next = *head;	2195	elem->next = *head;
2049	*head = elem;	2196	*head = elem;
2050	}	2197	}
2051		2198
2052	void inline_size	2199	inline_size void
2053	wlist_del (WL *head, WL elem)	2200	wlist_del (WL *head, WL elem)
2054	{	2201	{
2055	while (*head)	2202	while (*head)
2056	{	2203	{
2057	if (*head == elem)	2204	if (*head == elem)
…		…
2062		2209
2063	head = &(*head)->next;	2210	head = &(*head)->next;
2064	}	2211	}
2065	}	2212	}
2066		2213
2067	void inline_speed	2214	/* internal, faster, version of ev_clear_pending */
		2215	inline_speed void
2068	clear_pending (EV_P_ W w)	2216	clear_pending (EV_P_ W w)
2069	{	2217	{
2070	if (w->pending)	2218	if (w->pending)
2071	{	2219	{
2072	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2220	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2073	w->pending = 0;	2221	w->pending = 0;
2074	}	2222	}
2075	}	2223	}
2076		2224
2077	int	2225	int
…		…
2081	int pending = w_->pending;	2229	int pending = w_->pending;
2082		2230
2083	if (expect_true (pending))	2231	if (expect_true (pending))
2084	{	2232	{
2085	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2233	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2234	p->w = (W)&pending_w;
2086	w_->pending = 0;	2235	w_->pending = 0;
2087	p->w = 0;
2088	return p->events;	2236	return p->events;
2089	}	2237	}
2090	else	2238	else
2091	return 0;	2239	return 0;
2092	}	2240	}
2093		2241
2094	void inline_size	2242	inline_size void
2095	pri_adjust (EV_P_ W w)	2243	pri_adjust (EV_P_ W w)
2096	{	2244	{
2097	int pri = w->priority;	2245	int pri = w->priority;
2098	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2246	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2099	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2247	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2100	w->priority = pri;	2248	w->priority = pri;
2101	}	2249	}
2102		2250
2103	void inline_speed	2251	inline_speed void
2104	ev_start (EV_P_ W w, int active)	2252	ev_start (EV_P_ W w, int active)
2105	{	2253	{
2106	pri_adjust (EV_A_ w);	2254	pri_adjust (EV_A_ w);
2107	w->active = active;	2255	w->active = active;
2108	ev_ref (EV_A);	2256	ev_ref (EV_A);
2109	}	2257	}
2110		2258
2111	void inline_size	2259	inline_size void
2112	ev_stop (EV_P_ W w)	2260	ev_stop (EV_P_ W w)
2113	{	2261	{
2114	ev_unref (EV_A);	2262	ev_unref (EV_A);
2115	w->active = 0;	2263	w->active = 0;
2116	}	2264	}
…		…
2123	int fd = w->fd;	2271	int fd = w->fd;
2124		2272
2125	if (expect_false (ev_is_active (w)))	2273	if (expect_false (ev_is_active (w)))
2126	return;	2274	return;
2127		2275
2128	assert (("ev_io_start called with negative fd", fd >= 0));	2276	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))));	2277	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2130		2278
2131	EV_FREQUENT_CHECK;	2279	EV_FREQUENT_CHECK;
2132		2280
2133	ev_start (EV_A_ (W)w, 1);	2281	ev_start (EV_A_ (W)w, 1);
2134	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2282	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2135	wlist_add (&anfds[fd].head, (WL)w);	2283	wlist_add (&anfds[fd].head, (WL)w);
2136		2284
2137	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2285	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2138	w->events &= ~EV_IOFDSET;	2286	w->events &= ~EV__IOFDSET;
2139		2287
2140	EV_FREQUENT_CHECK;	2288	EV_FREQUENT_CHECK;
2141	}	2289	}
2142		2290
2143	void noinline	2291	void noinline
…		…
2145	{	2293	{
2146	clear_pending (EV_A_ (W)w);	2294	clear_pending (EV_A_ (W)w);
2147	if (expect_false (!ev_is_active (w)))	2295	if (expect_false (!ev_is_active (w)))
2148	return;	2296	return;
2149		2297
2150	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2298	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2151		2299
2152	EV_FREQUENT_CHECK;	2300	EV_FREQUENT_CHECK;
2153		2301
2154	wlist_del (&anfds[w->fd].head, (WL)w);	2302	wlist_del (&anfds[w->fd].head, (WL)w);
2155	ev_stop (EV_A_ (W)w);	2303	ev_stop (EV_A_ (W)w);
…		…
2165	if (expect_false (ev_is_active (w)))	2313	if (expect_false (ev_is_active (w)))
2166	return;	2314	return;
2167		2315
2168	ev_at (w) += mn_now;	2316	ev_at (w) += mn_now;
2169		2317
2170	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2318	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2171		2319
2172	EV_FREQUENT_CHECK;	2320	EV_FREQUENT_CHECK;
2173		2321
2174	++timercnt;	2322	++timercnt;
2175	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2323	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2178	ANHE_at_cache (timers [ev_active (w)]);	2326	ANHE_at_cache (timers [ev_active (w)]);
2179	upheap (timers, ev_active (w));	2327	upheap (timers, ev_active (w));
2180		2328
2181	EV_FREQUENT_CHECK;	2329	EV_FREQUENT_CHECK;
2182		2330
2183	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2331	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2184	}	2332	}
2185		2333
2186	void noinline	2334	void noinline
2187	ev_timer_stop (EV_P_ ev_timer *w)	2335	ev_timer_stop (EV_P_ ev_timer *w)
2188	{	2336	{
…		…
2193	EV_FREQUENT_CHECK;	2341	EV_FREQUENT_CHECK;
2194		2342
2195	{	2343	{
2196	int active = ev_active (w);	2344	int active = ev_active (w);
2197		2345
2198	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2346	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2199		2347
2200	--timercnt;	2348	--timercnt;
2201		2349
2202	if (expect_true (active < timercnt + HEAP0))	2350	if (expect_true (active < timercnt + HEAP0))
2203	{	2351	{
…		…
2247		2395
2248	if (w->reschedule_cb)	2396	if (w->reschedule_cb)
2249	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2397	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2250	else if (w->interval)	2398	else if (w->interval)
2251	{	2399	{
2252	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2400	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 */	2401	/* 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;	2402	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2255	}	2403	}
2256	else	2404	else
2257	ev_at (w) = w->offset;	2405	ev_at (w) = w->offset;
…		…
2265	ANHE_at_cache (periodics [ev_active (w)]);	2413	ANHE_at_cache (periodics [ev_active (w)]);
2266	upheap (periodics, ev_active (w));	2414	upheap (periodics, ev_active (w));
2267		2415
2268	EV_FREQUENT_CHECK;	2416	EV_FREQUENT_CHECK;
2269		2417
2270	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2418	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2271	}	2419	}
2272		2420
2273	void noinline	2421	void noinline
2274	ev_periodic_stop (EV_P_ ev_periodic *w)	2422	ev_periodic_stop (EV_P_ ev_periodic *w)
2275	{	2423	{
…		…
2280	EV_FREQUENT_CHECK;	2428	EV_FREQUENT_CHECK;
2281		2429
2282	{	2430	{
2283	int active = ev_active (w);	2431	int active = ev_active (w);
2284		2432
2285	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2433	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2286		2434
2287	--periodiccnt;	2435	--periodiccnt;
2288		2436
2289	if (expect_true (active < periodiccnt + HEAP0))	2437	if (expect_true (active < periodiccnt + HEAP0))
2290	{	2438	{
…		…
2313		2461
2314	void noinline	2462	void noinline
2315	ev_signal_start (EV_P_ ev_signal *w)	2463	ev_signal_start (EV_P_ ev_signal *w)
2316	{	2464	{
2317	#if EV_MULTIPLICITY	2465	#if EV_MULTIPLICITY
2318	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2466	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2319	#endif	2467	#endif
2320	if (expect_false (ev_is_active (w)))	2468	if (expect_false (ev_is_active (w)))
2321	return;	2469	return;
2322		2470
2323	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2471	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2324		2472
2325	evpipe_init (EV_A);	2473	evpipe_init (EV_A);
2326		2474
2327	EV_FREQUENT_CHECK;	2475	EV_FREQUENT_CHECK;
2328		2476
…		…
2379		2527
2380	void	2528	void
2381	ev_child_start (EV_P_ ev_child *w)	2529	ev_child_start (EV_P_ ev_child *w)
2382	{	2530	{
2383	#if EV_MULTIPLICITY	2531	#if EV_MULTIPLICITY
2384	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2532	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2385	#endif	2533	#endif
2386	if (expect_false (ev_is_active (w)))	2534	if (expect_false (ev_is_active (w)))
2387	return;	2535	return;
2388		2536
2389	EV_FREQUENT_CHECK;	2537	EV_FREQUENT_CHECK;
…		…
2414	# ifdef _WIN32	2562	# ifdef _WIN32
2415	# undef lstat	2563	# undef lstat
2416	# define lstat(a,b) _stati64 (a,b)	2564	# define lstat(a,b) _stati64 (a,b)
2417	# endif	2565	# endif
2418		2566
2419	#define DEF_STAT_INTERVAL 5.0074891	2567	#define DEF_STAT_INTERVAL 5.0074891
		2568	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2420	#define MIN_STAT_INTERVAL 0.1074891	2569	#define MIN_STAT_INTERVAL 0.1074891
2421		2570
2422	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2571	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2423		2572
2424	#if EV_USE_INOTIFY	2573	#if EV_USE_INOTIFY
2425	# define EV_INOTIFY_BUFSIZE 8192	2574	# define EV_INOTIFY_BUFSIZE 8192
…		…
2429	{	2578	{
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);	2579	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		2580
2432	if (w->wd < 0)	2581	if (w->wd < 0)
2433	{	2582	{
		2583	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 */	2584	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2435		2585
2436	/* monitor some parent directory for speedup hints */	2586	/* monitor some parent directory for speedup hints */
2437	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2587	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2438	/* but an efficiency issue only */	2588	/* but an efficiency issue only */
2439	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2589	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
…		…
2446	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2596	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2447	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2597	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2448		2598
2449	char *pend = strrchr (path, '/');	2599	char *pend = strrchr (path, '/');
2450		2600
2451	if (!pend)	2601	if (!pend || pend == path)
2452	break; /* whoops, no '/', complain to your admin */	2602	break;
2453		2603
2454	*pend = 0;	2604	*pend = 0;
2455	w->wd = inotify_add_watch (fs_fd, path, mask);	2605	w->wd = inotify_add_watch (fs_fd, path, mask);
2456	}	2606	}
2457	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2607	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2458	}	2608	}
2459	}	2609	}
2460	else
2461	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2462		2610
2463	if (w->wd >= 0)	2611	if (w->wd >= 0)
		2612	{
2464	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2613	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2614
		2615	/* now local changes will be tracked by inotify, but remote changes won't */
		2616	/* unless the filesystem it known to be local, we therefore still poll */
		2617	/* also do poll on <2.6.25, but with normal frequency */
		2618	struct statfs sfs;
		2619
		2620	if (fs_2625 && !statfs (w->path, &sfs))
		2621	if (sfs.f_type == 0x1373 /* devfs */
		2622	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2623	|| sfs.f_type == 0x3153464a /* jfs */
		2624	|| sfs.f_type == 0x52654973 /* reiser3 */
		2625	|| sfs.f_type == 0x01021994 /* tempfs */
		2626	|| sfs.f_type == 0x58465342 /* xfs */)
		2627	return;
		2628
		2629	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2630	ev_timer_again (EV_A_ &w->timer);
		2631	}
2465	}	2632	}
2466		2633
2467	static void noinline	2634	static void noinline
2468	infy_del (EV_P_ ev_stat *w)	2635	infy_del (EV_P_ ev_stat *w)
2469	{	2636	{
…		…
2499		2666
2500	if (w->wd == wd || wd == -1)	2667	if (w->wd == wd || wd == -1)
2501	{	2668	{
2502	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2669	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2503	{	2670	{
		2671	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2504	w->wd = -1;	2672	w->wd = -1;
2505	infy_add (EV_A_ w); /* re-add, no matter what */	2673	infy_add (EV_A_ w); /* re-add, no matter what */
2506	}	2674	}
2507		2675
2508	stat_timer_cb (EV_A_ &w->timer, 0);	2676	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2521		2689
2522	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2690	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2523	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2691	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2524	}	2692	}
2525		2693
2526	void inline_size	2694	inline_size void
2527	infy_init (EV_P)	2695	check_2625 (EV_P)
2528	{	2696	{
2529	if (fs_fd != -2)
2530	return;
2531
2532	/* kernels < 2.6.25 are borked	2697	/* kernels < 2.6.25 are borked
2533	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2698	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2534	*/	2699	*/
2535	{
2536	struct utsname buf;	2700	struct utsname buf;
2537	int major, minor, micro;	2701	int major, minor, micro;
2538		2702
2539	fs_fd = -1;
2540
2541	if (uname (&buf))	2703	if (uname (&buf))
2542	return;	2704	return;
2543		2705
2544	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2706	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2545	return;	2707	return;
2546		2708
2547	if (major < 2	2709	if (major < 2
2548	|| (major == 2 && minor < 6)	2710	|| (major == 2 && minor < 6)
2549	|| (major == 2 && minor == 6 && micro < 25))	2711	|| (major == 2 && minor == 6 && micro < 25))
2550	return;	2712	return;
2551	}	2713
		2714	fs_2625 = 1;
		2715	}
		2716
		2717	inline_size void
		2718	infy_init (EV_P)
		2719	{
		2720	if (fs_fd != -2)
		2721	return;
		2722
		2723	fs_fd = -1;
		2724
		2725	check_2625 (EV_A);
2552		2726
2553	fs_fd = inotify_init ();	2727	fs_fd = inotify_init ();
2554		2728
2555	if (fs_fd >= 0)	2729	if (fs_fd >= 0)
2556	{	2730	{
…		…
2558	ev_set_priority (&fs_w, EV_MAXPRI);	2732	ev_set_priority (&fs_w, EV_MAXPRI);
2559	ev_io_start (EV_A_ &fs_w);	2733	ev_io_start (EV_A_ &fs_w);
2560	}	2734	}
2561	}	2735	}
2562		2736
2563	void inline_size	2737	inline_size void
2564	infy_fork (EV_P)	2738	infy_fork (EV_P)
2565	{	2739	{
2566	int slot;	2740	int slot;
2567		2741
2568	if (fs_fd < 0)	2742	if (fs_fd < 0)
…		…
2584	w->wd = -1;	2758	w->wd = -1;
2585		2759
2586	if (fs_fd >= 0)	2760	if (fs_fd >= 0)
2587	infy_add (EV_A_ w); /* re-add, no matter what */	2761	infy_add (EV_A_ w); /* re-add, no matter what */
2588	else	2762	else
2589	ev_timer_start (EV_A_ &w->timer);	2763	ev_timer_again (EV_A_ &w->timer);
2590	}	2764	}
2591	}	2765	}
2592	}	2766	}
2593		2767
2594	#endif	2768	#endif
…		…
2649	ev_stat_start (EV_P_ ev_stat *w)	2823	ev_stat_start (EV_P_ ev_stat *w)
2650	{	2824	{
2651	if (expect_false (ev_is_active (w)))	2825	if (expect_false (ev_is_active (w)))
2652	return;	2826	return;
2653		2827
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);	2828	ev_stat_stat (EV_A_ w);
2659		2829
		2830	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2660	if (w->interval < MIN_STAT_INTERVAL)	2831	w->interval = MIN_STAT_INTERVAL;
2661	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2662		2832
2663	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2833	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));	2834	ev_set_priority (&w->timer, ev_priority (w));
2665		2835
2666	#if EV_USE_INOTIFY	2836	#if EV_USE_INOTIFY
2667	infy_init (EV_A);	2837	infy_init (EV_A);
2668		2838
2669	if (fs_fd >= 0)	2839	if (fs_fd >= 0)
2670	infy_add (EV_A_ w);	2840	infy_add (EV_A_ w);
2671	else	2841	else
2672	#endif	2842	#endif
2673	ev_timer_start (EV_A_ &w->timer);	2843	ev_timer_again (EV_A_ &w->timer);
2674		2844
2675	ev_start (EV_A_ (W)w, 1);	2845	ev_start (EV_A_ (W)w, 1);
2676		2846
2677	EV_FREQUENT_CHECK;	2847	EV_FREQUENT_CHECK;
2678	}	2848	}
…		…
2853	static void	3023	static void
2854	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3024	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2855	{	3025	{
2856	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3026	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2857		3027
		3028	ev_embed_stop (EV_A_ w);
		3029
2858	{	3030	{
2859	struct ev_loop *loop = w->other;	3031	struct ev_loop *loop = w->other;
2860		3032
2861	ev_loop_fork (EV_A);	3033	ev_loop_fork (EV_A);
		3034	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2862	}	3035	}
		3036
		3037	ev_embed_start (EV_A_ w);
2863	}	3038	}
2864		3039
2865	#if 0	3040	#if 0
2866	static void	3041	static void
2867	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3042	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2876	if (expect_false (ev_is_active (w)))	3051	if (expect_false (ev_is_active (w)))
2877	return;	3052	return;
2878		3053
2879	{	3054	{
2880	struct ev_loop *loop = w->other;	3055	struct ev_loop *loop = w->other;
2881	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3056	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);	3057	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2883	}	3058	}
2884		3059
2885	EV_FREQUENT_CHECK;	3060	EV_FREQUENT_CHECK;
2886		3061
…		…
3069	ev_timer_set (&once->to, timeout, 0.);	3244	ev_timer_set (&once->to, timeout, 0.);
3070	ev_timer_start (EV_A_ &once->to);	3245	ev_timer_start (EV_A_ &once->to);
3071	}	3246	}
3072	}	3247	}
3073		3248
		3249	/*****************************************************************************/
		3250
		3251	#if EV_WALK_ENABLE
		3252	void
		3253	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3254	{
		3255	int i, j;
		3256	ev_watcher_list *wl, *wn;
		3257
		3258	if (types & (EV_IO | EV_EMBED))
		3259	for (i = 0; i < anfdmax; ++i)
		3260	for (wl = anfds [i].head; wl; )
		3261	{
		3262	wn = wl->next;
		3263
		3264	#if EV_EMBED_ENABLE
		3265	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3266	{
		3267	if (types & EV_EMBED)
		3268	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3269	}
		3270	else
		3271	#endif
		3272	#if EV_USE_INOTIFY
		3273	if (ev_cb ((ev_io *)wl) == infy_cb)
		3274	;
		3275	else
		3276	#endif
		3277	if ((ev_io *)wl != &pipe_w)
		3278	if (types & EV_IO)
		3279	cb (EV_A_ EV_IO, wl);
		3280
		3281	wl = wn;
		3282	}
		3283
		3284	if (types & (EV_TIMER | EV_STAT))
		3285	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3286	#if EV_STAT_ENABLE
		3287	/*TODO: timer is not always active*/
		3288	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3289	{
		3290	if (types & EV_STAT)
		3291	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3292	}
		3293	else
		3294	#endif
		3295	if (types & EV_TIMER)
		3296	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3297
		3298	#if EV_PERIODIC_ENABLE
		3299	if (types & EV_PERIODIC)
		3300	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3301	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3302	#endif
		3303
		3304	#if EV_IDLE_ENABLE
		3305	if (types & EV_IDLE)
		3306	for (j = NUMPRI; i--; )
		3307	for (i = idlecnt [j]; i--; )
		3308	cb (EV_A_ EV_IDLE, idles [j][i]);
		3309	#endif
		3310
		3311	#if EV_FORK_ENABLE
		3312	if (types & EV_FORK)
		3313	for (i = forkcnt; i--; )
		3314	if (ev_cb (forks [i]) != embed_fork_cb)
		3315	cb (EV_A_ EV_FORK, forks [i]);
		3316	#endif
		3317
		3318	#if EV_ASYNC_ENABLE
		3319	if (types & EV_ASYNC)
		3320	for (i = asynccnt; i--; )
		3321	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3322	#endif
		3323
		3324	if (types & EV_PREPARE)
		3325	for (i = preparecnt; i--; )
		3326	#if EV_EMBED_ENABLE
		3327	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3328	#endif
		3329	cb (EV_A_ EV_PREPARE, prepares [i]);
		3330
		3331	if (types & EV_CHECK)
		3332	for (i = checkcnt; i--; )
		3333	cb (EV_A_ EV_CHECK, checks [i]);
		3334
		3335	if (types & EV_SIGNAL)
		3336	for (i = 0; i < signalmax; ++i)
		3337	for (wl = signals [i].head; wl; )
		3338	{
		3339	wn = wl->next;
		3340	cb (EV_A_ EV_SIGNAL, wl);
		3341	wl = wn;
		3342	}
		3343
		3344	if (types & EV_CHILD)
		3345	for (i = EV_PID_HASHSIZE; i--; )
		3346	for (wl = childs [i]; wl; )
		3347	{
		3348	wn = wl->next;
		3349	cb (EV_A_ EV_CHILD, wl);
		3350	wl = wn;
		3351	}
		3352	/* EV_STAT 0x00001000 /* stat data changed */
		3353	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3354	}
		3355	#endif
		3356
3074	#if EV_MULTIPLICITY	3357	#if EV_MULTIPLICITY
3075	#include "ev_wrap.h"	3358	#include "ev_wrap.h"
3076	#endif	3359	#endif
3077		3360
3078	#ifdef __cplusplus	3361	#ifdef __cplusplus

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