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Comparing libev/ev.c (file contents):
Revision 1.271 by root, Mon Nov 3 12:13:15 2008 UTC vs.
Revision 1.296 by root, Thu Jul 9 09:11:20 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
…		…
260	# define EV_USE_4HEAP !EV_MINIMAL	282	# define EV_USE_4HEAP !EV_MINIMAL
261	#endif	283	#endif
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
		287	#endif
		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
265	#endif	301	#endif
266		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
…		…
355	# define inline_speed static noinline	391	# define inline_speed static noinline
356	#else	392	#else
357	# define inline_speed static inline	393	# define inline_speed static inline
358	#endif	394	#endif
359		395
360	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	396	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		397
		398	#if EV_MINPRI == EV_MAXPRI
		399	# define ABSPRI(w) (((W)w), 0)
		400	#else
361	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	401	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		402	#endif
362		403
363	#define EMPTY /* required for microsofts broken pseudo-c compiler */	404	#define EMPTY /* required for microsofts broken pseudo-c compiler */
364	#define EMPTY2(a,b) /* used to suppress some warnings */	405	#define EMPTY2(a,b) /* used to suppress some warnings */
365		406
366	typedef ev_watcher *W;	407	typedef ev_watcher *W;
…		…
368	typedef ev_watcher_time *WT;	409	typedef ev_watcher_time *WT;
369		410
370	#define ev_active(w) ((W)(w))->active	411	#define ev_active(w) ((W)(w))->active
371	#define ev_at(w) ((WT)(w))->at	412	#define ev_at(w) ((WT)(w))->at
372		413
373	#if EV_USE_MONOTONIC	414	#if EV_USE_REALTIME
374	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	415	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
375	/* giving it a reasonably high chance of working on typical architetcures */	416	/* giving it a reasonably high chance of working on typical architetcures */
		417	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		418	#endif
		419
		420	#if EV_USE_MONOTONIC
376	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	421	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
377	#endif	422	#endif
378		423
379	#ifdef _WIN32	424	#ifdef _WIN32
380	# include "ev_win32.c"	425	# include "ev_win32.c"
…		…
445	#define ev_malloc(size) ev_realloc (0, (size))	490	#define ev_malloc(size) ev_realloc (0, (size))
446	#define ev_free(ptr) ev_realloc ((ptr), 0)	491	#define ev_free(ptr) ev_realloc ((ptr), 0)
447		492
448	/*****************************************************************************/	493	/*****************************************************************************/
449		494
		495	/* file descriptor info structure */
450	typedef struct	496	typedef struct
451	{	497	{
452	WL head;	498	WL head;
453	unsigned char events;	499	unsigned char events; /* the events watched for */
454	unsigned char reify;	500	unsigned char reify; /* flag set when this ANFD needs reification */
455	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	501	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
456	unsigned char unused;	502	unsigned char unused;
457	#if EV_USE_EPOLL	503	#if EV_USE_EPOLL
458	unsigned int egen; /* generation counter to counter epoll bugs */	504	unsigned int egen; /* generation counter to counter epoll bugs */
459	#endif	505	#endif
460	#if EV_SELECT_IS_WINSOCKET	506	#if EV_SELECT_IS_WINSOCKET
461	SOCKET handle;	507	SOCKET handle;
462	#endif	508	#endif
463	} ANFD;	509	} ANFD;
464		510
		511	/* stores the pending event set for a given watcher */
465	typedef struct	512	typedef struct
466	{	513	{
467	W w;	514	W w;
468	int events;	515	int events; /* the pending event set for the given watcher */
469	} ANPENDING;	516	} ANPENDING;
470		517
471	#if EV_USE_INOTIFY	518	#if EV_USE_INOTIFY
472	/* hash table entry per inotify-id */	519	/* hash table entry per inotify-id */
473	typedef struct	520	typedef struct
…		…
476	} ANFS;	523	} ANFS;
477	#endif	524	#endif
478		525
479	/* Heap Entry */	526	/* Heap Entry */
480	#if EV_HEAP_CACHE_AT	527	#if EV_HEAP_CACHE_AT
		528	/* a heap element */
481	typedef struct {	529	typedef struct {
482	ev_tstamp at;	530	ev_tstamp at;
483	WT w;	531	WT w;
484	} ANHE;	532	} ANHE;
485		533
486	#define ANHE_w(he) (he).w /* access watcher, read-write */	534	#define ANHE_w(he) (he).w /* access watcher, read-write */
487	#define ANHE_at(he) (he).at /* access cached at, read-only */	535	#define ANHE_at(he) (he).at /* access cached at, read-only */
488	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */	536	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
489	#else	537	#else
		538	/* a heap element */
490	typedef WT ANHE;	539	typedef WT ANHE;
491		540
492	#define ANHE_w(he) (he)	541	#define ANHE_w(he) (he)
493	#define ANHE_at(he) (he)->at	542	#define ANHE_at(he) (he)->at
494	#define ANHE_at_cache(he)	543	#define ANHE_at_cache(he)
…		…
520		569
521	#endif	570	#endif
522		571
523	/*****************************************************************************/	572	/*****************************************************************************/
524		573
		574	#ifndef EV_HAVE_EV_TIME
525	ev_tstamp	575	ev_tstamp
526	ev_time (void)	576	ev_time (void)
527	{	577	{
528	#if EV_USE_REALTIME	578	#if EV_USE_REALTIME
		579	if (expect_true (have_realtime))
		580	{
529	struct timespec ts;	581	struct timespec ts;
530	clock_gettime (CLOCK_REALTIME, &ts);	582	clock_gettime (CLOCK_REALTIME, &ts);
531	return ts.tv_sec + ts.tv_nsec * 1e-9;	583	return ts.tv_sec + ts.tv_nsec * 1e-9;
532	#else	584	}
		585	#endif
		586
533	struct timeval tv;	587	struct timeval tv;
534	gettimeofday (&tv, 0);	588	gettimeofday (&tv, 0);
535	return tv.tv_sec + tv.tv_usec * 1e-6;	589	return tv.tv_sec + tv.tv_usec * 1e-6;
536	#endif
537	}	590	}
		591	#endif
538		592
539	ev_tstamp inline_size	593	inline_size ev_tstamp
540	get_clock (void)	594	get_clock (void)
541	{	595	{
542	#if EV_USE_MONOTONIC	596	#if EV_USE_MONOTONIC
543	if (expect_true (have_monotonic))	597	if (expect_true (have_monotonic))
544	{	598	{
…		…
578		632
579	tv.tv_sec = (time_t)delay;	633	tv.tv_sec = (time_t)delay;
580	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	634	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
581		635
582	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	636	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
583	/* somehting nto guaranteed by newer posix versions, but guaranteed */	637	/* somehting not guaranteed by newer posix versions, but guaranteed */
584	/* by older ones */	638	/* by older ones */
585	select (0, 0, 0, 0, &tv);	639	select (0, 0, 0, 0, &tv);
586	#endif	640	#endif
587	}	641	}
588	}	642	}
589		643
590	/*****************************************************************************/	644	/*****************************************************************************/
591		645
592	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	646	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
593		647
594	int inline_size	648	/* find a suitable new size for the given array, */
		649	/* hopefully by rounding to a ncie-to-malloc size */
		650	inline_size int
595	array_nextsize (int elem, int cur, int cnt)	651	array_nextsize (int elem, int cur, int cnt)
596	{	652	{
597	int ncur = cur + 1;	653	int ncur = cur + 1;
598		654
599	do	655	do
…		…
640	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	696	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
641	}	697	}
642	#endif	698	#endif
643		699
644	#define array_free(stem, idx) \	700	#define array_free(stem, idx) \
645	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	701	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
646		702
647	/*****************************************************************************/	703	/*****************************************************************************/
		704
		705	/* dummy callback for pending events */
		706	static void noinline
		707	pendingcb (EV_P_ ev_prepare *w, int revents)
		708	{
		709	}
648		710
649	void noinline	711	void noinline
650	ev_feed_event (EV_P_ void *w, int revents)	712	ev_feed_event (EV_P_ void *w, int revents)
651	{	713	{
652	W w_ = (W)w;	714	W w_ = (W)w;
…		…
661	pendings [pri][w_->pending - 1].w = w_;	723	pendings [pri][w_->pending - 1].w = w_;
662	pendings [pri][w_->pending - 1].events = revents;	724	pendings [pri][w_->pending - 1].events = revents;
663	}	725	}
664	}	726	}
665		727
666	void inline_speed	728	inline_speed void
		729	feed_reverse (EV_P_ W w)
		730	{
		731	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		732	rfeeds [rfeedcnt++] = w;
		733	}
		734
		735	inline_size void
		736	feed_reverse_done (EV_P_ int revents)
		737	{
		738	do
		739	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		740	while (rfeedcnt);
		741	}
		742
		743	inline_speed void
667	queue_events (EV_P_ W *events, int eventcnt, int type)	744	queue_events (EV_P_ W *events, int eventcnt, int type)
668	{	745	{
669	int i;	746	int i;
670		747
671	for (i = 0; i < eventcnt; ++i)	748	for (i = 0; i < eventcnt; ++i)
672	ev_feed_event (EV_A_ events [i], type);	749	ev_feed_event (EV_A_ events [i], type);
673	}	750	}
674		751
675	/*****************************************************************************/	752	/*****************************************************************************/
676		753
677	void inline_speed	754	inline_speed void
678	fd_event (EV_P_ int fd, int revents)	755	fd_event (EV_P_ int fd, int revents)
679	{	756	{
680	ANFD *anfd = anfds + fd;	757	ANFD *anfd = anfds + fd;
681	ev_io *w;	758	ev_io *w;
682		759
…		…
694	{	771	{
695	if (fd >= 0 && fd < anfdmax)	772	if (fd >= 0 && fd < anfdmax)
696	fd_event (EV_A_ fd, revents);	773	fd_event (EV_A_ fd, revents);
697	}	774	}
698		775
699	void inline_size	776	/* make sure the external fd watch events are in-sync */
		777	/* with the kernel/libev internal state */
		778	inline_size void
700	fd_reify (EV_P)	779	fd_reify (EV_P)
701	{	780	{
702	int i;	781	int i;
703		782
704	for (i = 0; i < fdchangecnt; ++i)	783	for (i = 0; i < fdchangecnt; ++i)
…		…
719	#ifdef EV_FD_TO_WIN32_HANDLE	798	#ifdef EV_FD_TO_WIN32_HANDLE
720	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	799	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
721	#else	800	#else
722	anfd->handle = _get_osfhandle (fd);	801	anfd->handle = _get_osfhandle (fd);
723	#endif	802	#endif
724	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	803	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
725	}	804	}
726	#endif	805	#endif
727		806
728	{	807	{
729	unsigned char o_events = anfd->events;	808	unsigned char o_events = anfd->events;
730	unsigned char o_reify = anfd->reify;	809	unsigned char o_reify = anfd->reify;
731		810
732	anfd->reify = 0;	811	anfd->reify = 0;
733	anfd->events = events;	812	anfd->events = events;
734		813
735	if (o_events != events || o_reify & EV_IOFDSET)	814	if (o_events != events || o_reify & EV__IOFDSET)
736	backend_modify (EV_A_ fd, o_events, events);	815	backend_modify (EV_A_ fd, o_events, events);
737	}	816	}
738	}	817	}
739		818
740	fdchangecnt = 0;	819	fdchangecnt = 0;
741	}	820	}
742		821
743	void inline_size	822	/* something about the given fd changed */
		823	inline_size void
744	fd_change (EV_P_ int fd, int flags)	824	fd_change (EV_P_ int fd, int flags)
745	{	825	{
746	unsigned char reify = anfds [fd].reify;	826	unsigned char reify = anfds [fd].reify;
747	anfds [fd].reify |= flags;	827	anfds [fd].reify |= flags;
748		828
…		…
752	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	832	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
753	fdchanges [fdchangecnt - 1] = fd;	833	fdchanges [fdchangecnt - 1] = fd;
754	}	834	}
755	}	835	}
756		836
757	void inline_speed	837	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		838	inline_speed void
758	fd_kill (EV_P_ int fd)	839	fd_kill (EV_P_ int fd)
759	{	840	{
760	ev_io *w;	841	ev_io *w;
761		842
762	while ((w = (ev_io *)anfds [fd].head))	843	while ((w = (ev_io *)anfds [fd].head))
…		…
764	ev_io_stop (EV_A_ w);	845	ev_io_stop (EV_A_ w);
765	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	846	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
766	}	847	}
767	}	848	}
768		849
769	int inline_size	850	/* check whether the given fd is atcually valid, for error recovery */
		851	inline_size int
770	fd_valid (int fd)	852	fd_valid (int fd)
771	{	853	{
772	#ifdef _WIN32	854	#ifdef _WIN32
773	return _get_osfhandle (fd) != -1;	855	return _get_osfhandle (fd) != -1;
774	#else	856	#else
…		…
811	for (fd = 0; fd < anfdmax; ++fd)	893	for (fd = 0; fd < anfdmax; ++fd)
812	if (anfds [fd].events)	894	if (anfds [fd].events)
813	{	895	{
814	anfds [fd].events = 0;	896	anfds [fd].events = 0;
815	anfds [fd].emask = 0;	897	anfds [fd].emask = 0;
816	fd_change (EV_A_ fd, EV_IOFDSET | 1);	898	fd_change (EV_A_ fd, EV__IOFDSET | 1);
817	}	899	}
818	}	900	}
819		901
820	/*****************************************************************************/	902	/*****************************************************************************/
821		903
…		…
837	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	919	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
838	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	920	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
839	#define UPHEAP_DONE(p,k) ((p) == (k))	921	#define UPHEAP_DONE(p,k) ((p) == (k))
840		922
841	/* away from the root */	923	/* away from the root */
842	void inline_speed	924	inline_speed void
843	downheap (ANHE *heap, int N, int k)	925	downheap (ANHE *heap, int N, int k)
844	{	926	{
845	ANHE he = heap [k];	927	ANHE he = heap [k];
846	ANHE *E = heap + N + HEAP0;	928	ANHE *E = heap + N + HEAP0;
847		929
…		…
887	#define HEAP0 1	969	#define HEAP0 1
888	#define HPARENT(k) ((k) >> 1)	970	#define HPARENT(k) ((k) >> 1)
889	#define UPHEAP_DONE(p,k) (!(p))	971	#define UPHEAP_DONE(p,k) (!(p))
890		972
891	/* away from the root */	973	/* away from the root */
892	void inline_speed	974	inline_speed void
893	downheap (ANHE *heap, int N, int k)	975	downheap (ANHE *heap, int N, int k)
894	{	976	{
895	ANHE he = heap [k];	977	ANHE he = heap [k];
896		978
897	for (;;)	979	for (;;)
…		…
917	ev_active (ANHE_w (he)) = k;	999	ev_active (ANHE_w (he)) = k;
918	}	1000	}
919	#endif	1001	#endif
920		1002
921	/* towards the root */	1003	/* towards the root */
922	void inline_speed	1004	inline_speed void
923	upheap (ANHE *heap, int k)	1005	upheap (ANHE *heap, int k)
924	{	1006	{
925	ANHE he = heap [k];	1007	ANHE he = heap [k];
926		1008
927	for (;;)	1009	for (;;)
…		…
938		1020
939	heap [k] = he;	1021	heap [k] = he;
940	ev_active (ANHE_w (he)) = k;	1022	ev_active (ANHE_w (he)) = k;
941	}	1023	}
942		1024
943	void inline_size	1025	/* move an element suitably so it is in a correct place */
		1026	inline_size void
944	adjustheap (ANHE *heap, int N, int k)	1027	adjustheap (ANHE *heap, int N, int k)
945	{	1028	{
946	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1029	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
947	upheap (heap, k);	1030	upheap (heap, k);
948	else	1031	else
949	downheap (heap, N, k);	1032	downheap (heap, N, k);
950	}	1033	}
951		1034
952	/* rebuild the heap: this function is used only once and executed rarely */	1035	/* rebuild the heap: this function is used only once and executed rarely */
953	void inline_size	1036	inline_size void
954	reheap (ANHE *heap, int N)	1037	reheap (ANHE *heap, int N)
955	{	1038	{
956	int i;	1039	int i;
957		1040
958	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1041	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
961	upheap (heap, i + HEAP0);	1044	upheap (heap, i + HEAP0);
962	}	1045	}
963		1046
964	/*****************************************************************************/	1047	/*****************************************************************************/
965		1048
		1049	/* associate signal watchers to a signal signal */
966	typedef struct	1050	typedef struct
967	{	1051	{
968	WL head;	1052	WL head;
969	EV_ATOMIC_T gotsig;	1053	EV_ATOMIC_T gotsig;
970	} ANSIG;	1054	} ANSIG;
…		…
974		1058
975	static EV_ATOMIC_T gotsig;	1059	static EV_ATOMIC_T gotsig;
976		1060
977	/*****************************************************************************/	1061	/*****************************************************************************/
978		1062
979	void inline_speed	1063	/* used to prepare libev internal fd's */
		1064	/* this is not fork-safe */
		1065	inline_speed void
980	fd_intern (int fd)	1066	fd_intern (int fd)
981	{	1067	{
982	#ifdef _WIN32	1068	#ifdef _WIN32
983	unsigned long arg = 1;	1069	unsigned long arg = 1;
984	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1070	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
989	}	1075	}
990		1076
991	static void noinline	1077	static void noinline
992	evpipe_init (EV_P)	1078	evpipe_init (EV_P)
993	{	1079	{
994	if (!ev_is_active (&pipeev))	1080	if (!ev_is_active (&pipe_w))
995	{	1081	{
996	#if EV_USE_EVENTFD	1082	#if EV_USE_EVENTFD
997	if ((evfd = eventfd (0, 0)) >= 0)	1083	if ((evfd = eventfd (0, 0)) >= 0)
998	{	1084	{
999	evpipe [0] = -1;	1085	evpipe [0] = -1;
1000	fd_intern (evfd);	1086	fd_intern (evfd);
1001	ev_io_set (&pipeev, evfd, EV_READ);	1087	ev_io_set (&pipe_w, evfd, EV_READ);
1002	}	1088	}
1003	else	1089	else
1004	#endif	1090	#endif
1005	{	1091	{
1006	while (pipe (evpipe))	1092	while (pipe (evpipe))
1007	ev_syserr ("(libev) error creating signal/async pipe");	1093	ev_syserr ("(libev) error creating signal/async pipe");
1008		1094
1009	fd_intern (evpipe [0]);	1095	fd_intern (evpipe [0]);
1010	fd_intern (evpipe [1]);	1096	fd_intern (evpipe [1]);
1011	ev_io_set (&pipeev, evpipe [0], EV_READ);	1097	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1012	}	1098	}
1013		1099
1014	ev_io_start (EV_A_ &pipeev);	1100	ev_io_start (EV_A_ &pipe_w);
1015	ev_unref (EV_A); /* watcher should not keep loop alive */	1101	ev_unref (EV_A); /* watcher should not keep loop alive */
1016	}	1102	}
1017	}	1103	}
1018		1104
1019	void inline_size	1105	inline_size void
1020	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1106	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1021	{	1107	{
1022	if (!*flag)	1108	if (!*flag)
1023	{	1109	{
1024	int old_errno = errno; /* save errno because write might clobber it */	1110	int old_errno = errno; /* save errno because write might clobber it */
…		…
1037		1123
1038	errno = old_errno;	1124	errno = old_errno;
1039	}	1125	}
1040	}	1126	}
1041		1127
		1128	/* called whenever the libev signal pipe */
		1129	/* got some events (signal, async) */
1042	static void	1130	static void
1043	pipecb (EV_P_ ev_io *iow, int revents)	1131	pipecb (EV_P_ ev_io *iow, int revents)
1044	{	1132	{
1045	#if EV_USE_EVENTFD	1133	#if EV_USE_EVENTFD
1046	if (evfd >= 0)	1134	if (evfd >= 0)
…		…
1102	ev_feed_signal_event (EV_P_ int signum)	1190	ev_feed_signal_event (EV_P_ int signum)
1103	{	1191	{
1104	WL w;	1192	WL w;
1105		1193
1106	#if EV_MULTIPLICITY	1194	#if EV_MULTIPLICITY
1107	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1195	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1108	#endif	1196	#endif
1109		1197
1110	--signum;	1198	--signum;
1111		1199
1112	if (signum < 0 || signum >= signalmax)	1200	if (signum < 0 || signum >= signalmax)
…		…
1128		1216
1129	#ifndef WIFCONTINUED	1217	#ifndef WIFCONTINUED
1130	# define WIFCONTINUED(status) 0	1218	# define WIFCONTINUED(status) 0
1131	#endif	1219	#endif
1132		1220
1133	void inline_speed	1221	/* handle a single child status event */
		1222	inline_speed void
1134	child_reap (EV_P_ int chain, int pid, int status)	1223	child_reap (EV_P_ int chain, int pid, int status)
1135	{	1224	{
1136	ev_child *w;	1225	ev_child *w;
1137	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1226	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1138		1227
…		…
1151		1240
1152	#ifndef WCONTINUED	1241	#ifndef WCONTINUED
1153	# define WCONTINUED 0	1242	# define WCONTINUED 0
1154	#endif	1243	#endif
1155		1244
		1245	/* called on sigchld etc., calls waitpid */
1156	static void	1246	static void
1157	childcb (EV_P_ ev_signal *sw, int revents)	1247	childcb (EV_P_ ev_signal *sw, int revents)
1158	{	1248	{
1159	int pid, status;	1249	int pid, status;
1160		1250
…		…
1241	/* kqueue is borked on everything but netbsd apparently */	1331	/* kqueue is borked on everything but netbsd apparently */
1242	/* it usually doesn't work correctly on anything but sockets and pipes */	1332	/* it usually doesn't work correctly on anything but sockets and pipes */
1243	flags &= ~EVBACKEND_KQUEUE;	1333	flags &= ~EVBACKEND_KQUEUE;
1244	#endif	1334	#endif
1245	#ifdef __APPLE__	1335	#ifdef __APPLE__
1246	// flags &= ~EVBACKEND_KQUEUE; for documentation	1336	/* only select works correctly on that "unix-certified" platform */
1247	flags &= ~EVBACKEND_POLL;	1337	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1338	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1248	#endif	1339	#endif
1249		1340
1250	return flags;	1341	return flags;
1251	}	1342	}
1252		1343
…		…
1272	ev_loop_count (EV_P)	1363	ev_loop_count (EV_P)
1273	{	1364	{
1274	return loop_count;	1365	return loop_count;
1275	}	1366	}
1276		1367
		1368	unsigned int
		1369	ev_loop_depth (EV_P)
		1370	{
		1371	return loop_depth;
		1372	}
		1373
1277	void	1374	void
1278	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1375	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1279	{	1376	{
1280	io_blocktime = interval;	1377	io_blocktime = interval;
1281	}	1378	}
…		…
1284	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1381	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1285	{	1382	{
1286	timeout_blocktime = interval;	1383	timeout_blocktime = interval;
1287	}	1384	}
1288		1385
		1386	/* initialise a loop structure, must be zero-initialised */
1289	static void noinline	1387	static void noinline
1290	loop_init (EV_P_ unsigned int flags)	1388	loop_init (EV_P_ unsigned int flags)
1291	{	1389	{
1292	if (!backend)	1390	if (!backend)
1293	{	1391	{
		1392	#if EV_USE_REALTIME
		1393	if (!have_realtime)
		1394	{
		1395	struct timespec ts;
		1396
		1397	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1398	have_realtime = 1;
		1399	}
		1400	#endif
		1401
1294	#if EV_USE_MONOTONIC	1402	#if EV_USE_MONOTONIC
		1403	if (!have_monotonic)
1295	{	1404	{
1296	struct timespec ts;	1405	struct timespec ts;
		1406
1297	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1407	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1298	have_monotonic = 1;	1408	have_monotonic = 1;
1299	}	1409	}
1300	#endif	1410	#endif
1301		1411
1302	ev_rt_now = ev_time ();	1412	ev_rt_now = ev_time ();
1303	mn_now = get_clock ();	1413	mn_now = get_clock ();
1304	now_floor = mn_now;	1414	now_floor = mn_now;
1305	rtmn_diff = ev_rt_now - mn_now;	1415	rtmn_diff = ev_rt_now - mn_now;
		1416	invoke_cb = ev_invoke_pending;
1306		1417
1307	io_blocktime = 0.;	1418	io_blocktime = 0.;
1308	timeout_blocktime = 0.;	1419	timeout_blocktime = 0.;
1309	backend = 0;	1420	backend = 0;
1310	backend_fd = -1;	1421	backend_fd = -1;
…		…
1341	#endif	1452	#endif
1342	#if EV_USE_SELECT	1453	#if EV_USE_SELECT
1343	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1454	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1344	#endif	1455	#endif
1345		1456
		1457	ev_prepare_init (&pending_w, pendingcb);
		1458
1346	ev_init (&pipeev, pipecb);	1459	ev_init (&pipe_w, pipecb);
1347	ev_set_priority (&pipeev, EV_MAXPRI);	1460	ev_set_priority (&pipe_w, EV_MAXPRI);
1348	}	1461	}
1349	}	1462	}
1350		1463
		1464	/* free up a loop structure */
1351	static void noinline	1465	static void noinline
1352	loop_destroy (EV_P)	1466	loop_destroy (EV_P)
1353	{	1467	{
1354	int i;	1468	int i;
1355		1469
1356	if (ev_is_active (&pipeev))	1470	if (ev_is_active (&pipe_w))
1357	{	1471	{
1358	ev_ref (EV_A); /* signal watcher */	1472	ev_ref (EV_A); /* signal watcher */
1359	ev_io_stop (EV_A_ &pipeev);	1473	ev_io_stop (EV_A_ &pipe_w);
1360		1474
1361	#if EV_USE_EVENTFD	1475	#if EV_USE_EVENTFD
1362	if (evfd >= 0)	1476	if (evfd >= 0)
1363	close (evfd);	1477	close (evfd);
1364	#endif	1478	#endif
…		…
1403	}	1517	}
1404		1518
1405	ev_free (anfds); anfdmax = 0;	1519	ev_free (anfds); anfdmax = 0;
1406		1520
1407	/* have to use the microsoft-never-gets-it-right macro */	1521	/* have to use the microsoft-never-gets-it-right macro */
		1522	array_free (rfeed, EMPTY);
1408	array_free (fdchange, EMPTY);	1523	array_free (fdchange, EMPTY);
1409	array_free (timer, EMPTY);	1524	array_free (timer, EMPTY);
1410	#if EV_PERIODIC_ENABLE	1525	#if EV_PERIODIC_ENABLE
1411	array_free (periodic, EMPTY);	1526	array_free (periodic, EMPTY);
1412	#endif	1527	#endif
…		…
1421		1536
1422	backend = 0;	1537	backend = 0;
1423	}	1538	}
1424		1539
1425	#if EV_USE_INOTIFY	1540	#if EV_USE_INOTIFY
1426	void inline_size infy_fork (EV_P);	1541	inline_size void infy_fork (EV_P);
1427	#endif	1542	#endif
1428		1543
1429	void inline_size	1544	inline_size void
1430	loop_fork (EV_P)	1545	loop_fork (EV_P)
1431	{	1546	{
1432	#if EV_USE_PORT	1547	#if EV_USE_PORT
1433	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1548	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1434	#endif	1549	#endif
…		…
1440	#endif	1555	#endif
1441	#if EV_USE_INOTIFY	1556	#if EV_USE_INOTIFY
1442	infy_fork (EV_A);	1557	infy_fork (EV_A);
1443	#endif	1558	#endif
1444		1559
1445	if (ev_is_active (&pipeev))	1560	if (ev_is_active (&pipe_w))
1446	{	1561	{
1447	/* this "locks" the handlers against writing to the pipe */	1562	/* this "locks" the handlers against writing to the pipe */
1448	/* while we modify the fd vars */	1563	/* while we modify the fd vars */
1449	gotsig = 1;	1564	gotsig = 1;
1450	#if EV_ASYNC_ENABLE	1565	#if EV_ASYNC_ENABLE
1451	gotasync = 1;	1566	gotasync = 1;
1452	#endif	1567	#endif
1453		1568
1454	ev_ref (EV_A);	1569	ev_ref (EV_A);
1455	ev_io_stop (EV_A_ &pipeev);	1570	ev_io_stop (EV_A_ &pipe_w);
1456		1571
1457	#if EV_USE_EVENTFD	1572	#if EV_USE_EVENTFD
1458	if (evfd >= 0)	1573	if (evfd >= 0)
1459	close (evfd);	1574	close (evfd);
1460	#endif	1575	#endif
…		…
1465	close (evpipe [1]);	1580	close (evpipe [1]);
1466	}	1581	}
1467		1582
1468	evpipe_init (EV_A);	1583	evpipe_init (EV_A);
1469	/* now iterate over everything, in case we missed something */	1584	/* now iterate over everything, in case we missed something */
1470	pipecb (EV_A_ &pipeev, EV_READ);	1585	pipecb (EV_A_ &pipe_w, EV_READ);
1471	}	1586	}
1472		1587
1473	postfork = 0;	1588	postfork = 0;
1474	}	1589	}
1475		1590
…		…
1505		1620
1506	#if EV_VERIFY	1621	#if EV_VERIFY
1507	static void noinline	1622	static void noinline
1508	verify_watcher (EV_P_ W w)	1623	verify_watcher (EV_P_ W w)
1509	{	1624	{
1510	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1625	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1511		1626
1512	if (w->pending)	1627	if (w->pending)
1513	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	1628	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1514	}	1629	}
1515		1630
1516	static void noinline	1631	static void noinline
1517	verify_heap (EV_P_ ANHE *heap, int N)	1632	verify_heap (EV_P_ ANHE *heap, int N)
1518	{	1633	{
1519	int i;	1634	int i;
1520		1635
1521	for (i = HEAP0; i < N + HEAP0; ++i)	1636	for (i = HEAP0; i < N + HEAP0; ++i)
1522	{	1637	{
1523	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));	1638	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1524	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));	1639	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1525	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));	1640	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1526		1641
1527	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1642	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1528	}	1643	}
1529	}	1644	}
1530		1645
1531	static void noinline	1646	static void noinline
1532	array_verify (EV_P_ W *ws, int cnt)	1647	array_verify (EV_P_ W *ws, int cnt)
1533	{	1648	{
1534	while (cnt--)	1649	while (cnt--)
1535	{	1650	{
1536	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1651	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1537	verify_watcher (EV_A_ ws [cnt]);	1652	verify_watcher (EV_A_ ws [cnt]);
1538	}	1653	}
1539	}	1654	}
1540	#endif	1655	#endif
1541		1656
…		…
1548		1663
1549	assert (activecnt >= -1);	1664	assert (activecnt >= -1);
1550		1665
1551	assert (fdchangemax >= fdchangecnt);	1666	assert (fdchangemax >= fdchangecnt);
1552	for (i = 0; i < fdchangecnt; ++i)	1667	for (i = 0; i < fdchangecnt; ++i)
1553	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1668	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1554		1669
1555	assert (anfdmax >= 0);	1670	assert (anfdmax >= 0);
1556	for (i = 0; i < anfdmax; ++i)	1671	for (i = 0; i < anfdmax; ++i)
1557	for (w = anfds [i].head; w; w = w->next)	1672	for (w = anfds [i].head; w; w = w->next)
1558	{	1673	{
1559	verify_watcher (EV_A_ (W)w);	1674	verify_watcher (EV_A_ (W)w);
1560	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1675	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1561	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));	1676	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1562	}	1677	}
1563		1678
1564	assert (timermax >= timercnt);	1679	assert (timermax >= timercnt);
1565	verify_heap (EV_A_ timers, timercnt);	1680	verify_heap (EV_A_ timers, timercnt);
1566		1681
…		…
1671	ev_invoke (EV_P_ void *w, int revents)	1786	ev_invoke (EV_P_ void *w, int revents)
1672	{	1787	{
1673	EV_CB_INVOKE ((W)w, revents);	1788	EV_CB_INVOKE ((W)w, revents);
1674	}	1789	}
1675		1790
1676	void inline_speed	1791	void
1677	call_pending (EV_P)	1792	ev_invoke_pending (EV_P)
1678	{	1793	{
1679	int pri;	1794	int pri;
1680		1795
1681	for (pri = NUMPRI; pri--; )	1796	for (pri = NUMPRI; pri--; )
1682	while (pendingcnt [pri])	1797	while (pendingcnt [pri])
1683	{	1798	{
1684	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1799	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1685		1800
1686	if (expect_true (p->w))
1687	{
1688	/*assert (("non-pending watcher on pending list", p->w->pending));*/	1801	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1802	/* ^ this is no longer true, as pending_w could be here */
1689		1803
1690	p->w->pending = 0;	1804	p->w->pending = 0;
1691	EV_CB_INVOKE (p->w, p->events);	1805	EV_CB_INVOKE (p->w, p->events);
1692	EV_FREQUENT_CHECK;	1806	EV_FREQUENT_CHECK;
1693	}
1694	}	1807	}
1695	}	1808	}
1696		1809
1697	#if EV_IDLE_ENABLE	1810	#if EV_IDLE_ENABLE
1698	void inline_size	1811	/* make idle watchers pending. this handles the "call-idle */
		1812	/* only when higher priorities are idle" logic */
		1813	inline_size void
1699	idle_reify (EV_P)	1814	idle_reify (EV_P)
1700	{	1815	{
1701	if (expect_false (idleall))	1816	if (expect_false (idleall))
1702	{	1817	{
1703	int pri;	1818	int pri;
…		…
1715	}	1830	}
1716	}	1831	}
1717	}	1832	}
1718	#endif	1833	#endif
1719		1834
1720	void inline_size	1835	/* make timers pending */
		1836	inline_size void
1721	timers_reify (EV_P)	1837	timers_reify (EV_P)
1722	{	1838	{
1723	EV_FREQUENT_CHECK;	1839	EV_FREQUENT_CHECK;
1724		1840
1725	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1841	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1726	{	1842	{
1727	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1843	do
1728
1729	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1730
1731	/* first reschedule or stop timer */
1732	if (w->repeat)
1733	{	1844	{
		1845	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1846
		1847	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1848
		1849	/* first reschedule or stop timer */
		1850	if (w->repeat)
		1851	{
1734	ev_at (w) += w->repeat;	1852	ev_at (w) += w->repeat;
1735	if (ev_at (w) < mn_now)	1853	if (ev_at (w) < mn_now)
1736	ev_at (w) = mn_now;	1854	ev_at (w) = mn_now;
1737		1855
1738	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1856	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1739		1857
1740	ANHE_at_cache (timers [HEAP0]);	1858	ANHE_at_cache (timers [HEAP0]);
1741	downheap (timers, timercnt, HEAP0);	1859	downheap (timers, timercnt, HEAP0);
		1860	}
		1861	else
		1862	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1863
		1864	EV_FREQUENT_CHECK;
		1865	feed_reverse (EV_A_ (W)w);
1742	}	1866	}
1743	else	1867	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1744	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1745		1868
1746	EV_FREQUENT_CHECK;
1747	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1869	feed_reverse_done (EV_A_ EV_TIMEOUT);
1748	}	1870	}
1749	}	1871	}
1750		1872
1751	#if EV_PERIODIC_ENABLE	1873	#if EV_PERIODIC_ENABLE
1752	void inline_size	1874	/* make periodics pending */
		1875	inline_size void
1753	periodics_reify (EV_P)	1876	periodics_reify (EV_P)
1754	{	1877	{
1755	EV_FREQUENT_CHECK;	1878	EV_FREQUENT_CHECK;
1756		1879
1757	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1880	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1758	{	1881	{
1759	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1882	int feed_count = 0;
1760		1883
1761	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1884	do
1762
1763	/* first reschedule or stop timer */
1764	if (w->reschedule_cb)
1765	{	1885	{
		1886	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1887
		1888	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		1889
		1890	/* first reschedule or stop timer */
		1891	if (w->reschedule_cb)
		1892	{
1766	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1893	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1767		1894
1768	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1895	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1769		1896
1770	ANHE_at_cache (periodics [HEAP0]);	1897	ANHE_at_cache (periodics [HEAP0]);
1771	downheap (periodics, periodiccnt, HEAP0);	1898	downheap (periodics, periodiccnt, HEAP0);
		1899	}
		1900	else if (w->interval)
		1901	{
		1902	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1903	/* if next trigger time is not sufficiently in the future, put it there */
		1904	/* this might happen because of floating point inexactness */
		1905	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1906	{
		1907	ev_at (w) += w->interval;
		1908
		1909	/* if interval is unreasonably low we might still have a time in the past */
		1910	/* so correct this. this will make the periodic very inexact, but the user */
		1911	/* has effectively asked to get triggered more often than possible */
		1912	if (ev_at (w) < ev_rt_now)
		1913	ev_at (w) = ev_rt_now;
		1914	}
		1915
		1916	ANHE_at_cache (periodics [HEAP0]);
		1917	downheap (periodics, periodiccnt, HEAP0);
		1918	}
		1919	else
		1920	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1921
		1922	EV_FREQUENT_CHECK;
		1923	feed_reverse (EV_A_ (W)w);
1772	}	1924	}
1773	else if (w->interval)	1925	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1774	{
1775	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1776	/* if next trigger time is not sufficiently in the future, put it there */
1777	/* this might happen because of floating point inexactness */
1778	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1779	{
1780	ev_at (w) += w->interval;
1781		1926
1782	/* if interval is unreasonably low we might still have a time in the past */
1783	/* so correct this. this will make the periodic very inexact, but the user */
1784	/* has effectively asked to get triggered more often than possible */
1785	if (ev_at (w) < ev_rt_now)
1786	ev_at (w) = ev_rt_now;
1787	}
1788
1789	ANHE_at_cache (periodics [HEAP0]);
1790	downheap (periodics, periodiccnt, HEAP0);
1791	}
1792	else
1793	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1794
1795	EV_FREQUENT_CHECK;
1796	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1927	feed_reverse_done (EV_A_ EV_PERIODIC);
1797	}	1928	}
1798	}	1929	}
1799		1930
		1931	/* simply recalculate all periodics */
		1932	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1800	static void noinline	1933	static void noinline
1801	periodics_reschedule (EV_P)	1934	periodics_reschedule (EV_P)
1802	{	1935	{
1803	int i;	1936	int i;
1804		1937
…		…
1817		1950
1818	reheap (periodics, periodiccnt);	1951	reheap (periodics, periodiccnt);
1819	}	1952	}
1820	#endif	1953	#endif
1821		1954
1822	void inline_speed	1955	/* adjust all timers by a given offset */
		1956	static void noinline
		1957	timers_reschedule (EV_P_ ev_tstamp adjust)
		1958	{
		1959	int i;
		1960
		1961	for (i = 0; i < timercnt; ++i)
		1962	{
		1963	ANHE *he = timers + i + HEAP0;
		1964	ANHE_w (*he)->at += adjust;
		1965	ANHE_at_cache (*he);
		1966	}
		1967	}
		1968
		1969	/* fetch new monotonic and realtime times from the kernel */
		1970	/* also detetc if there was a timejump, and act accordingly */
		1971	inline_speed void
1823	time_update (EV_P_ ev_tstamp max_block)	1972	time_update (EV_P_ ev_tstamp max_block)
1824	{	1973	{
1825	int i;
1826
1827	#if EV_USE_MONOTONIC	1974	#if EV_USE_MONOTONIC
1828	if (expect_true (have_monotonic))	1975	if (expect_true (have_monotonic))
1829	{	1976	{
		1977	int i;
1830	ev_tstamp odiff = rtmn_diff;	1978	ev_tstamp odiff = rtmn_diff;
1831		1979
1832	mn_now = get_clock ();	1980	mn_now = get_clock ();
1833		1981
1834	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1982	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1860	ev_rt_now = ev_time ();	2008	ev_rt_now = ev_time ();
1861	mn_now = get_clock ();	2009	mn_now = get_clock ();
1862	now_floor = mn_now;	2010	now_floor = mn_now;
1863	}	2011	}
1864		2012
		2013	/* no timer adjustment, as the monotonic clock doesn't jump */
		2014	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1865	# if EV_PERIODIC_ENABLE	2015	# if EV_PERIODIC_ENABLE
1866	periodics_reschedule (EV_A);	2016	periodics_reschedule (EV_A);
1867	# endif	2017	# endif
1868	/* no timer adjustment, as the monotonic clock doesn't jump */
1869	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1870	}	2018	}
1871	else	2019	else
1872	#endif	2020	#endif
1873	{	2021	{
1874	ev_rt_now = ev_time ();	2022	ev_rt_now = ev_time ();
1875		2023
1876	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2024	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1877	{	2025	{
		2026	/* adjust timers. this is easy, as the offset is the same for all of them */
		2027	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1878	#if EV_PERIODIC_ENABLE	2028	#if EV_PERIODIC_ENABLE
1879	periodics_reschedule (EV_A);	2029	periodics_reschedule (EV_A);
1880	#endif	2030	#endif
1881	/* adjust timers. this is easy, as the offset is the same for all of them */
1882	for (i = 0; i < timercnt; ++i)
1883	{
1884	ANHE *he = timers + i + HEAP0;
1885	ANHE_w (*he)->at += ev_rt_now - mn_now;
1886	ANHE_at_cache (*he);
1887	}
1888	}	2031	}
1889		2032
1890	mn_now = ev_rt_now;	2033	mn_now = ev_rt_now;
1891	}	2034	}
1892	}	2035	}
1893		2036
1894	void	2037	void
1895	ev_ref (EV_P)
1896	{
1897	++activecnt;
1898	}
1899
1900	void
1901	ev_unref (EV_P)
1902	{
1903	--activecnt;
1904	}
1905
1906	void
1907	ev_now_update (EV_P)
1908	{
1909	time_update (EV_A_ 1e100);
1910	}
1911
1912	static int loop_done;
1913
1914	void
1915	ev_loop (EV_P_ int flags)	2038	ev_loop (EV_P_ int flags)
1916	{	2039	{
		2040	++loop_depth;
		2041
1917	loop_done = EVUNLOOP_CANCEL;	2042	loop_done = EVUNLOOP_CANCEL;
1918		2043
1919	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2044	invoke_cb (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1920		2045
1921	do	2046	do
1922	{	2047	{
1923	#if EV_VERIFY >= 2	2048	#if EV_VERIFY >= 2
1924	ev_loop_verify (EV_A);	2049	ev_loop_verify (EV_A);
…		…
1937	/* we might have forked, so queue fork handlers */	2062	/* we might have forked, so queue fork handlers */
1938	if (expect_false (postfork))	2063	if (expect_false (postfork))
1939	if (forkcnt)	2064	if (forkcnt)
1940	{	2065	{
1941	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2066	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1942	call_pending (EV_A);	2067	invoke_cb (EV_A);
1943	}	2068	}
1944	#endif	2069	#endif
1945		2070
1946	/* queue prepare watchers (and execute them) */	2071	/* queue prepare watchers (and execute them) */
1947	if (expect_false (preparecnt))	2072	if (expect_false (preparecnt))
1948	{	2073	{
1949	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2074	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1950	call_pending (EV_A);	2075	invoke_cb (EV_A);
1951	}	2076	}
1952
1953	if (expect_false (!activecnt))
1954	break;
1955		2077
1956	/* we might have forked, so reify kernel state if necessary */	2078	/* we might have forked, so reify kernel state if necessary */
1957	if (expect_false (postfork))	2079	if (expect_false (postfork))
1958	loop_fork (EV_A);	2080	loop_fork (EV_A);
1959		2081
…		…
1965	ev_tstamp waittime = 0.;	2087	ev_tstamp waittime = 0.;
1966	ev_tstamp sleeptime = 0.;	2088	ev_tstamp sleeptime = 0.;
1967		2089
1968	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2090	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1969	{	2091	{
		2092	/* remember old timestamp for io_blocktime calculation */
		2093	ev_tstamp prev_mn_now = mn_now;
		2094
1970	/* update time to cancel out callback processing overhead */	2095	/* update time to cancel out callback processing overhead */
1971	time_update (EV_A_ 1e100);	2096	time_update (EV_A_ 1e100);
1972		2097
1973	waittime = MAX_BLOCKTIME;	2098	waittime = MAX_BLOCKTIME;
1974		2099
…		…
1984	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2109	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1985	if (waittime > to) waittime = to;	2110	if (waittime > to) waittime = to;
1986	}	2111	}
1987	#endif	2112	#endif
1988		2113
		2114	/* don't let timeouts decrease the waittime below timeout_blocktime */
1989	if (expect_false (waittime < timeout_blocktime))	2115	if (expect_false (waittime < timeout_blocktime))
1990	waittime = timeout_blocktime;	2116	waittime = timeout_blocktime;
1991		2117
1992	sleeptime = waittime - backend_fudge;	2118	/* extra check because io_blocktime is commonly 0 */
1993
1994	if (expect_true (sleeptime > io_blocktime))	2119	if (expect_false (io_blocktime))
1995	sleeptime = io_blocktime;
1996
1997	if (sleeptime)
1998	{	2120	{
		2121	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2122
		2123	if (sleeptime > waittime - backend_fudge)
		2124	sleeptime = waittime - backend_fudge;
		2125
		2126	if (expect_true (sleeptime > 0.))
		2127	{
1999	ev_sleep (sleeptime);	2128	ev_sleep (sleeptime);
2000	waittime -= sleeptime;	2129	waittime -= sleeptime;
		2130	}
2001	}	2131	}
2002	}	2132	}
2003		2133
2004	++loop_count;	2134	++loop_count;
2005	backend_poll (EV_A_ waittime);	2135	backend_poll (EV_A_ waittime);
…		…
2021		2151
2022	/* queue check watchers, to be executed first */	2152	/* queue check watchers, to be executed first */
2023	if (expect_false (checkcnt))	2153	if (expect_false (checkcnt))
2024	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2154	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2025		2155
2026	call_pending (EV_A);	2156	invoke_cb (EV_A);
2027	}	2157	}
2028	while (expect_true (	2158	while (expect_true (
2029	activecnt	2159	activecnt
2030	&& !loop_done	2160	&& !loop_done
2031	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2161	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2032	));	2162	));
2033		2163
2034	if (loop_done == EVUNLOOP_ONE)	2164	if (loop_done == EVUNLOOP_ONE)
2035	loop_done = EVUNLOOP_CANCEL;	2165	loop_done = EVUNLOOP_CANCEL;
		2166
		2167	--loop_depth;
2036	}	2168	}
2037		2169
2038	void	2170	void
2039	ev_unloop (EV_P_ int how)	2171	ev_unloop (EV_P_ int how)
2040	{	2172	{
2041	loop_done = how;	2173	loop_done = how;
2042	}	2174	}
2043		2175
		2176	void
		2177	ev_ref (EV_P)
		2178	{
		2179	++activecnt;
		2180	}
		2181
		2182	void
		2183	ev_unref (EV_P)
		2184	{
		2185	--activecnt;
		2186	}
		2187
		2188	void
		2189	ev_now_update (EV_P)
		2190	{
		2191	time_update (EV_A_ 1e100);
		2192	}
		2193
		2194	void
		2195	ev_suspend (EV_P)
		2196	{
		2197	ev_now_update (EV_A);
		2198	}
		2199
		2200	void
		2201	ev_resume (EV_P)
		2202	{
		2203	ev_tstamp mn_prev = mn_now;
		2204
		2205	ev_now_update (EV_A);
		2206	timers_reschedule (EV_A_ mn_now - mn_prev);
		2207	#if EV_PERIODIC_ENABLE
		2208	/* TODO: really do this? */
		2209	periodics_reschedule (EV_A);
		2210	#endif
		2211	}
		2212
2044	/*****************************************************************************/	2213	/*****************************************************************************/
		2214	/* singly-linked list management, used when the expected list length is short */
2045		2215
2046	void inline_size	2216	inline_size void
2047	wlist_add (WL *head, WL elem)	2217	wlist_add (WL *head, WL elem)
2048	{	2218	{
2049	elem->next = *head;	2219	elem->next = *head;
2050	*head = elem;	2220	*head = elem;
2051	}	2221	}
2052		2222
2053	void inline_size	2223	inline_size void
2054	wlist_del (WL *head, WL elem)	2224	wlist_del (WL *head, WL elem)
2055	{	2225	{
2056	while (*head)	2226	while (*head)
2057	{	2227	{
2058	if (*head == elem)	2228	if (*head == elem)
…		…
2063		2233
2064	head = &(*head)->next;	2234	head = &(*head)->next;
2065	}	2235	}
2066	}	2236	}
2067		2237
2068	void inline_speed	2238	/* internal, faster, version of ev_clear_pending */
		2239	inline_speed void
2069	clear_pending (EV_P_ W w)	2240	clear_pending (EV_P_ W w)
2070	{	2241	{
2071	if (w->pending)	2242	if (w->pending)
2072	{	2243	{
2073	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2244	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2074	w->pending = 0;	2245	w->pending = 0;
2075	}	2246	}
2076	}	2247	}
2077		2248
2078	int	2249	int
…		…
2082	int pending = w_->pending;	2253	int pending = w_->pending;
2083		2254
2084	if (expect_true (pending))	2255	if (expect_true (pending))
2085	{	2256	{
2086	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2257	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2258	p->w = (W)&pending_w;
2087	w_->pending = 0;	2259	w_->pending = 0;
2088	p->w = 0;
2089	return p->events;	2260	return p->events;
2090	}	2261	}
2091	else	2262	else
2092	return 0;	2263	return 0;
2093	}	2264	}
2094		2265
2095	void inline_size	2266	inline_size void
2096	pri_adjust (EV_P_ W w)	2267	pri_adjust (EV_P_ W w)
2097	{	2268	{
2098	int pri = w->priority;	2269	int pri = ev_priority (w);
2099	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2270	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2100	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2271	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2101	w->priority = pri;	2272	ev_set_priority (w, pri);
2102	}	2273	}
2103		2274
2104	void inline_speed	2275	inline_speed void
2105	ev_start (EV_P_ W w, int active)	2276	ev_start (EV_P_ W w, int active)
2106	{	2277	{
2107	pri_adjust (EV_A_ w);	2278	pri_adjust (EV_A_ w);
2108	w->active = active;	2279	w->active = active;
2109	ev_ref (EV_A);	2280	ev_ref (EV_A);
2110	}	2281	}
2111		2282
2112	void inline_size	2283	inline_size void
2113	ev_stop (EV_P_ W w)	2284	ev_stop (EV_P_ W w)
2114	{	2285	{
2115	ev_unref (EV_A);	2286	ev_unref (EV_A);
2116	w->active = 0;	2287	w->active = 0;
2117	}	2288	}
…		…
2124	int fd = w->fd;	2295	int fd = w->fd;
2125		2296
2126	if (expect_false (ev_is_active (w)))	2297	if (expect_false (ev_is_active (w)))
2127	return;	2298	return;
2128		2299
2129	assert (("ev_io_start called with negative fd", fd >= 0));	2300	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2130	assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));	2301	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2131		2302
2132	EV_FREQUENT_CHECK;	2303	EV_FREQUENT_CHECK;
2133		2304
2134	ev_start (EV_A_ (W)w, 1);	2305	ev_start (EV_A_ (W)w, 1);
2135	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2306	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2136	wlist_add (&anfds[fd].head, (WL)w);	2307	wlist_add (&anfds[fd].head, (WL)w);
2137		2308
2138	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2309	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2139	w->events &= ~EV_IOFDSET;	2310	w->events &= ~EV__IOFDSET;
2140		2311
2141	EV_FREQUENT_CHECK;	2312	EV_FREQUENT_CHECK;
2142	}	2313	}
2143		2314
2144	void noinline	2315	void noinline
…		…
2146	{	2317	{
2147	clear_pending (EV_A_ (W)w);	2318	clear_pending (EV_A_ (W)w);
2148	if (expect_false (!ev_is_active (w)))	2319	if (expect_false (!ev_is_active (w)))
2149	return;	2320	return;
2150		2321
2151	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2322	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2152		2323
2153	EV_FREQUENT_CHECK;	2324	EV_FREQUENT_CHECK;
2154		2325
2155	wlist_del (&anfds[w->fd].head, (WL)w);	2326	wlist_del (&anfds[w->fd].head, (WL)w);
2156	ev_stop (EV_A_ (W)w);	2327	ev_stop (EV_A_ (W)w);
…		…
2166	if (expect_false (ev_is_active (w)))	2337	if (expect_false (ev_is_active (w)))
2167	return;	2338	return;
2168		2339
2169	ev_at (w) += mn_now;	2340	ev_at (w) += mn_now;
2170		2341
2171	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2342	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2172		2343
2173	EV_FREQUENT_CHECK;	2344	EV_FREQUENT_CHECK;
2174		2345
2175	++timercnt;	2346	++timercnt;
2176	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2347	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2179	ANHE_at_cache (timers [ev_active (w)]);	2350	ANHE_at_cache (timers [ev_active (w)]);
2180	upheap (timers, ev_active (w));	2351	upheap (timers, ev_active (w));
2181		2352
2182	EV_FREQUENT_CHECK;	2353	EV_FREQUENT_CHECK;
2183		2354
2184	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2355	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2185	}	2356	}
2186		2357
2187	void noinline	2358	void noinline
2188	ev_timer_stop (EV_P_ ev_timer *w)	2359	ev_timer_stop (EV_P_ ev_timer *w)
2189	{	2360	{
…		…
2194	EV_FREQUENT_CHECK;	2365	EV_FREQUENT_CHECK;
2195		2366
2196	{	2367	{
2197	int active = ev_active (w);	2368	int active = ev_active (w);
2198		2369
2199	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2370	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2200		2371
2201	--timercnt;	2372	--timercnt;
2202		2373
2203	if (expect_true (active < timercnt + HEAP0))	2374	if (expect_true (active < timercnt + HEAP0))
2204	{	2375	{
…		…
2248		2419
2249	if (w->reschedule_cb)	2420	if (w->reschedule_cb)
2250	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2421	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2251	else if (w->interval)	2422	else if (w->interval)
2252	{	2423	{
2253	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2424	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2254	/* this formula differs from the one in periodic_reify because we do not always round up */	2425	/* this formula differs from the one in periodic_reify because we do not always round up */
2255	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2426	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2256	}	2427	}
2257	else	2428	else
2258	ev_at (w) = w->offset;	2429	ev_at (w) = w->offset;
…		…
2266	ANHE_at_cache (periodics [ev_active (w)]);	2437	ANHE_at_cache (periodics [ev_active (w)]);
2267	upheap (periodics, ev_active (w));	2438	upheap (periodics, ev_active (w));
2268		2439
2269	EV_FREQUENT_CHECK;	2440	EV_FREQUENT_CHECK;
2270		2441
2271	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2442	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2272	}	2443	}
2273		2444
2274	void noinline	2445	void noinline
2275	ev_periodic_stop (EV_P_ ev_periodic *w)	2446	ev_periodic_stop (EV_P_ ev_periodic *w)
2276	{	2447	{
…		…
2281	EV_FREQUENT_CHECK;	2452	EV_FREQUENT_CHECK;
2282		2453
2283	{	2454	{
2284	int active = ev_active (w);	2455	int active = ev_active (w);
2285		2456
2286	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2457	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2287		2458
2288	--periodiccnt;	2459	--periodiccnt;
2289		2460
2290	if (expect_true (active < periodiccnt + HEAP0))	2461	if (expect_true (active < periodiccnt + HEAP0))
2291	{	2462	{
…		…
2314		2485
2315	void noinline	2486	void noinline
2316	ev_signal_start (EV_P_ ev_signal *w)	2487	ev_signal_start (EV_P_ ev_signal *w)
2317	{	2488	{
2318	#if EV_MULTIPLICITY	2489	#if EV_MULTIPLICITY
2319	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2490	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2320	#endif	2491	#endif
2321	if (expect_false (ev_is_active (w)))	2492	if (expect_false (ev_is_active (w)))
2322	return;	2493	return;
2323		2494
2324	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2495	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2325		2496
2326	evpipe_init (EV_A);	2497	evpipe_init (EV_A);
2327		2498
2328	EV_FREQUENT_CHECK;	2499	EV_FREQUENT_CHECK;
2329		2500
…		…
2380		2551
2381	void	2552	void
2382	ev_child_start (EV_P_ ev_child *w)	2553	ev_child_start (EV_P_ ev_child *w)
2383	{	2554	{
2384	#if EV_MULTIPLICITY	2555	#if EV_MULTIPLICITY
2385	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2556	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2386	#endif	2557	#endif
2387	if (expect_false (ev_is_active (w)))	2558	if (expect_false (ev_is_active (w)))
2388	return;	2559	return;
2389		2560
2390	EV_FREQUENT_CHECK;	2561	EV_FREQUENT_CHECK;
…		…
2415	# ifdef _WIN32	2586	# ifdef _WIN32
2416	# undef lstat	2587	# undef lstat
2417	# define lstat(a,b) _stati64 (a,b)	2588	# define lstat(a,b) _stati64 (a,b)
2418	# endif	2589	# endif
2419		2590
2420	#define DEF_STAT_INTERVAL 5.0074891	2591	#define DEF_STAT_INTERVAL 5.0074891
		2592	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2421	#define MIN_STAT_INTERVAL 0.1074891	2593	#define MIN_STAT_INTERVAL 0.1074891
2422		2594
2423	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2595	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2424		2596
2425	#if EV_USE_INOTIFY	2597	#if EV_USE_INOTIFY
2426	# define EV_INOTIFY_BUFSIZE 8192	2598	# define EV_INOTIFY_BUFSIZE 8192
…		…
2430	{	2602	{
2431	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);	2603	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2432		2604
2433	if (w->wd < 0)	2605	if (w->wd < 0)
2434	{	2606	{
		2607	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2435	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2608	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2436		2609
2437	/* monitor some parent directory for speedup hints */	2610	/* monitor some parent directory for speedup hints */
2438	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2611	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2439	/* but an efficiency issue only */	2612	/* but an efficiency issue only */
2440	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2613	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
…		…
2447	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2620	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2448	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2621	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2449		2622
2450	char *pend = strrchr (path, '/');	2623	char *pend = strrchr (path, '/');
2451		2624
2452	if (!pend)	2625	if (!pend || pend == path)
2453	break; /* whoops, no '/', complain to your admin */	2626	break;
2454		2627
2455	*pend = 0;	2628	*pend = 0;
2456	w->wd = inotify_add_watch (fs_fd, path, mask);	2629	w->wd = inotify_add_watch (fs_fd, path, mask);
2457	}	2630	}
2458	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2631	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2459	}	2632	}
2460	}	2633	}
2461	else
2462	todo, on nfs etc., we need to poll every 60s or so
2463	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2464		2634
2465	if (w->wd >= 0)	2635	if (w->wd >= 0)
		2636	{
2466	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2637	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2638
		2639	/* now local changes will be tracked by inotify, but remote changes won't */
		2640	/* unless the filesystem it known to be local, we therefore still poll */
		2641	/* also do poll on <2.6.25, but with normal frequency */
		2642	struct statfs sfs;
		2643
		2644	if (fs_2625 && !statfs (w->path, &sfs))
		2645	if (sfs.f_type == 0x1373 /* devfs */
		2646	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2647	|| sfs.f_type == 0x3153464a /* jfs */
		2648	|| sfs.f_type == 0x52654973 /* reiser3 */
		2649	|| sfs.f_type == 0x01021994 /* tempfs */
		2650	|| sfs.f_type == 0x58465342 /* xfs */)
		2651	return;
		2652
		2653	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2654	ev_timer_again (EV_A_ &w->timer);
		2655	}
2467	}	2656	}
2468		2657
2469	static void noinline	2658	static void noinline
2470	infy_del (EV_P_ ev_stat *w)	2659	infy_del (EV_P_ ev_stat *w)
2471	{	2660	{
…		…
2501		2690
2502	if (w->wd == wd || wd == -1)	2691	if (w->wd == wd || wd == -1)
2503	{	2692	{
2504	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2693	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2505	{	2694	{
		2695	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2506	w->wd = -1;	2696	w->wd = -1;
2507	infy_add (EV_A_ w); /* re-add, no matter what */	2697	infy_add (EV_A_ w); /* re-add, no matter what */
2508	}	2698	}
2509		2699
2510	stat_timer_cb (EV_A_ &w->timer, 0);	2700	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2523		2713
2524	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2714	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2525	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2715	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2526	}	2716	}
2527		2717
2528	void inline_size	2718	inline_size void
2529	infy_init (EV_P)	2719	check_2625 (EV_P)
2530	{	2720	{
2531	if (fs_fd != -2)
2532	return;
2533
2534	/* kernels < 2.6.25 are borked	2721	/* kernels < 2.6.25 are borked
2535	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2722	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2536	*/	2723	*/
2537	{
2538	struct utsname buf;	2724	struct utsname buf;
2539	int major, minor, micro;	2725	int major, minor, micro;
2540		2726
2541	fs_fd = -1;
2542
2543	if (uname (&buf))	2727	if (uname (&buf))
2544	return;	2728	return;
2545		2729
2546	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2730	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2547	return;	2731	return;
2548		2732
2549	if (major < 2	2733	if (major < 2
2550	|| (major == 2 && minor < 6)	2734	|| (major == 2 && minor < 6)
2551	|| (major == 2 && minor == 6 && micro < 25))	2735	|| (major == 2 && minor == 6 && micro < 25))
2552	return;	2736	return;
2553	}	2737
		2738	fs_2625 = 1;
		2739	}
		2740
		2741	inline_size void
		2742	infy_init (EV_P)
		2743	{
		2744	if (fs_fd != -2)
		2745	return;
		2746
		2747	fs_fd = -1;
		2748
		2749	check_2625 (EV_A);
2554		2750
2555	fs_fd = inotify_init ();	2751	fs_fd = inotify_init ();
2556		2752
2557	if (fs_fd >= 0)	2753	if (fs_fd >= 0)
2558	{	2754	{
…		…
2560	ev_set_priority (&fs_w, EV_MAXPRI);	2756	ev_set_priority (&fs_w, EV_MAXPRI);
2561	ev_io_start (EV_A_ &fs_w);	2757	ev_io_start (EV_A_ &fs_w);
2562	}	2758	}
2563	}	2759	}
2564		2760
2565	void inline_size	2761	inline_size void
2566	infy_fork (EV_P)	2762	infy_fork (EV_P)
2567	{	2763	{
2568	int slot;	2764	int slot;
2569		2765
2570	if (fs_fd < 0)	2766	if (fs_fd < 0)
…		…
2586	w->wd = -1;	2782	w->wd = -1;
2587		2783
2588	if (fs_fd >= 0)	2784	if (fs_fd >= 0)
2589	infy_add (EV_A_ w); /* re-add, no matter what */	2785	infy_add (EV_A_ w); /* re-add, no matter what */
2590	else	2786	else
2591	ev_timer_start (EV_A_ &w->timer);	2787	ev_timer_again (EV_A_ &w->timer);
2592	}	2788	}
2593	}	2789	}
2594	}	2790	}
2595		2791
2596	#endif	2792	#endif
…		…
2651	ev_stat_start (EV_P_ ev_stat *w)	2847	ev_stat_start (EV_P_ ev_stat *w)
2652	{	2848	{
2653	if (expect_false (ev_is_active (w)))	2849	if (expect_false (ev_is_active (w)))
2654	return;	2850	return;
2655		2851
2656	/* since we use memcmp, we need to clear any padding data etc. */
2657	memset (&w->prev, 0, sizeof (ev_statdata));
2658	memset (&w->attr, 0, sizeof (ev_statdata));
2659
2660	ev_stat_stat (EV_A_ w);	2852	ev_stat_stat (EV_A_ w);
2661		2853
		2854	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2662	if (w->interval < MIN_STAT_INTERVAL)	2855	w->interval = MIN_STAT_INTERVAL;
2663	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2664		2856
2665	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2857	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2666	ev_set_priority (&w->timer, ev_priority (w));	2858	ev_set_priority (&w->timer, ev_priority (w));
2667		2859
2668	#if EV_USE_INOTIFY	2860	#if EV_USE_INOTIFY
2669	infy_init (EV_A);	2861	infy_init (EV_A);
2670		2862
2671	if (fs_fd >= 0)	2863	if (fs_fd >= 0)
2672	infy_add (EV_A_ w);	2864	infy_add (EV_A_ w);
2673	else	2865	else
2674	#endif	2866	#endif
2675	ev_timer_start (EV_A_ &w->timer);	2867	ev_timer_again (EV_A_ &w->timer);
2676		2868
2677	ev_start (EV_A_ (W)w, 1);	2869	ev_start (EV_A_ (W)w, 1);
2678		2870
2679	EV_FREQUENT_CHECK;	2871	EV_FREQUENT_CHECK;
2680	}	2872	}
…		…
2855	static void	3047	static void
2856	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3048	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2857	{	3049	{
2858	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3050	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2859		3051
		3052	ev_embed_stop (EV_A_ w);
		3053
2860	{	3054	{
2861	struct ev_loop *loop = w->other;	3055	struct ev_loop *loop = w->other;
2862		3056
2863	ev_loop_fork (EV_A);	3057	ev_loop_fork (EV_A);
		3058	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2864	}	3059	}
		3060
		3061	ev_embed_start (EV_A_ w);
2865	}	3062	}
2866		3063
2867	#if 0	3064	#if 0
2868	static void	3065	static void
2869	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3066	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2878	if (expect_false (ev_is_active (w)))	3075	if (expect_false (ev_is_active (w)))
2879	return;	3076	return;
2880		3077
2881	{	3078	{
2882	struct ev_loop *loop = w->other;	3079	struct ev_loop *loop = w->other;
2883	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3080	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2884	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3081	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2885	}	3082	}
2886		3083
2887	EV_FREQUENT_CHECK;	3084	EV_FREQUENT_CHECK;
2888		3085
…		…
3071	ev_timer_set (&once->to, timeout, 0.);	3268	ev_timer_set (&once->to, timeout, 0.);
3072	ev_timer_start (EV_A_ &once->to);	3269	ev_timer_start (EV_A_ &once->to);
3073	}	3270	}
3074	}	3271	}
3075		3272
		3273	/*****************************************************************************/
		3274
		3275	#if EV_WALK_ENABLE
		3276	void
		3277	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3278	{
		3279	int i, j;
		3280	ev_watcher_list *wl, *wn;
		3281
		3282	if (types & (EV_IO | EV_EMBED))
		3283	for (i = 0; i < anfdmax; ++i)
		3284	for (wl = anfds [i].head; wl; )
		3285	{
		3286	wn = wl->next;
		3287
		3288	#if EV_EMBED_ENABLE
		3289	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3290	{
		3291	if (types & EV_EMBED)
		3292	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3293	}
		3294	else
		3295	#endif
		3296	#if EV_USE_INOTIFY
		3297	if (ev_cb ((ev_io *)wl) == infy_cb)
		3298	;
		3299	else
		3300	#endif
		3301	if ((ev_io *)wl != &pipe_w)
		3302	if (types & EV_IO)
		3303	cb (EV_A_ EV_IO, wl);
		3304
		3305	wl = wn;
		3306	}
		3307
		3308	if (types & (EV_TIMER | EV_STAT))
		3309	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3310	#if EV_STAT_ENABLE
		3311	/*TODO: timer is not always active*/
		3312	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3313	{
		3314	if (types & EV_STAT)
		3315	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3316	}
		3317	else
		3318	#endif
		3319	if (types & EV_TIMER)
		3320	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3321
		3322	#if EV_PERIODIC_ENABLE
		3323	if (types & EV_PERIODIC)
		3324	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3325	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3326	#endif
		3327
		3328	#if EV_IDLE_ENABLE
		3329	if (types & EV_IDLE)
		3330	for (j = NUMPRI; i--; )
		3331	for (i = idlecnt [j]; i--; )
		3332	cb (EV_A_ EV_IDLE, idles [j][i]);
		3333	#endif
		3334
		3335	#if EV_FORK_ENABLE
		3336	if (types & EV_FORK)
		3337	for (i = forkcnt; i--; )
		3338	if (ev_cb (forks [i]) != embed_fork_cb)
		3339	cb (EV_A_ EV_FORK, forks [i]);
		3340	#endif
		3341
		3342	#if EV_ASYNC_ENABLE
		3343	if (types & EV_ASYNC)
		3344	for (i = asynccnt; i--; )
		3345	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3346	#endif
		3347
		3348	if (types & EV_PREPARE)
		3349	for (i = preparecnt; i--; )
		3350	#if EV_EMBED_ENABLE
		3351	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3352	#endif
		3353	cb (EV_A_ EV_PREPARE, prepares [i]);
		3354
		3355	if (types & EV_CHECK)
		3356	for (i = checkcnt; i--; )
		3357	cb (EV_A_ EV_CHECK, checks [i]);
		3358
		3359	if (types & EV_SIGNAL)
		3360	for (i = 0; i < signalmax; ++i)
		3361	for (wl = signals [i].head; wl; )
		3362	{
		3363	wn = wl->next;
		3364	cb (EV_A_ EV_SIGNAL, wl);
		3365	wl = wn;
		3366	}
		3367
		3368	if (types & EV_CHILD)
		3369	for (i = EV_PID_HASHSIZE; i--; )
		3370	for (wl = childs [i]; wl; )
		3371	{
		3372	wn = wl->next;
		3373	cb (EV_A_ EV_CHILD, wl);
		3374	wl = wn;
		3375	}
		3376	/* EV_STAT 0x00001000 /* stat data changed */
		3377	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3378	}
		3379	#endif
		3380
3076	#if EV_MULTIPLICITY	3381	#if EV_MULTIPLICITY
3077	#include "ev_wrap.h"	3382	#include "ev_wrap.h"
3078	#endif	3383	#endif
3079		3384
3080	#ifdef __cplusplus	3385	#ifdef __cplusplus

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