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Comparing libev/ev.c (file contents):
Revision 1.269 by root, Wed Oct 29 06:32:48 2008 UTC vs.
Revision 1.295 by root, Wed Jul 8 04:29:31 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
…		…
354	# define inline_speed static noinline	391	# define inline_speed static noinline
355	#else	392	#else
356	# define inline_speed static inline	393	# define inline_speed static inline
357	#endif	394	#endif
358		395
359	#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
360	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	401	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		402	#endif
361		403
362	#define EMPTY /* required for microsofts broken pseudo-c compiler */	404	#define EMPTY /* required for microsofts broken pseudo-c compiler */
363	#define EMPTY2(a,b) /* used to suppress some warnings */	405	#define EMPTY2(a,b) /* used to suppress some warnings */
364		406
365	typedef ev_watcher *W;	407	typedef ev_watcher *W;
…		…
367	typedef ev_watcher_time *WT;	409	typedef ev_watcher_time *WT;
368		410
369	#define ev_active(w) ((W)(w))->active	411	#define ev_active(w) ((W)(w))->active
370	#define ev_at(w) ((WT)(w))->at	412	#define ev_at(w) ((WT)(w))->at
371		413
372	#if EV_USE_MONOTONIC	414	#if EV_USE_REALTIME
373	/* 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 */
374	/* 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
375	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? */
376	#endif	422	#endif
377		423
378	#ifdef _WIN32	424	#ifdef _WIN32
379	# include "ev_win32.c"	425	# include "ev_win32.c"
…		…
444	#define ev_malloc(size) ev_realloc (0, (size))	490	#define ev_malloc(size) ev_realloc (0, (size))
445	#define ev_free(ptr) ev_realloc ((ptr), 0)	491	#define ev_free(ptr) ev_realloc ((ptr), 0)
446		492
447	/*****************************************************************************/	493	/*****************************************************************************/
448		494
		495	/* file descriptor info structure */
449	typedef struct	496	typedef struct
450	{	497	{
451	WL head;	498	WL head;
452	unsigned char events;	499	unsigned char events; /* the events watched for */
453	unsigned char reify;	500	unsigned char reify; /* flag set when this ANFD needs reification */
454	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 */
455	unsigned char unused;	502	unsigned char unused;
456	#if EV_USE_EPOLL	503	#if EV_USE_EPOLL
457	unsigned int egen; /* generation counter to counter epoll bugs */	504	unsigned int egen; /* generation counter to counter epoll bugs */
458	#endif	505	#endif
459	#if EV_SELECT_IS_WINSOCKET	506	#if EV_SELECT_IS_WINSOCKET
460	SOCKET handle;	507	SOCKET handle;
461	#endif	508	#endif
462	} ANFD;	509	} ANFD;
463		510
		511	/* stores the pending event set for a given watcher */
464	typedef struct	512	typedef struct
465	{	513	{
466	W w;	514	W w;
467	int events;	515	int events; /* the pending event set for the given watcher */
468	} ANPENDING;	516	} ANPENDING;
469		517
470	#if EV_USE_INOTIFY	518	#if EV_USE_INOTIFY
471	/* hash table entry per inotify-id */	519	/* hash table entry per inotify-id */
472	typedef struct	520	typedef struct
…		…
475	} ANFS;	523	} ANFS;
476	#endif	524	#endif
477		525
478	/* Heap Entry */	526	/* Heap Entry */
479	#if EV_HEAP_CACHE_AT	527	#if EV_HEAP_CACHE_AT
		528	/* a heap element */
480	typedef struct {	529	typedef struct {
481	ev_tstamp at;	530	ev_tstamp at;
482	WT w;	531	WT w;
483	} ANHE;	532	} ANHE;
484		533
485	#define ANHE_w(he) (he).w /* access watcher, read-write */	534	#define ANHE_w(he) (he).w /* access watcher, read-write */
486	#define ANHE_at(he) (he).at /* access cached at, read-only */	535	#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 */	536	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
488	#else	537	#else
		538	/* a heap element */
489	typedef WT ANHE;	539	typedef WT ANHE;
490		540
491	#define ANHE_w(he) (he)	541	#define ANHE_w(he) (he)
492	#define ANHE_at(he) (he)->at	542	#define ANHE_at(he) (he)->at
493	#define ANHE_at_cache(he)	543	#define ANHE_at_cache(he)
…		…
519		569
520	#endif	570	#endif
521		571
522	/*****************************************************************************/	572	/*****************************************************************************/
523		573
		574	#ifndef EV_HAVE_EV_TIME
524	ev_tstamp	575	ev_tstamp
525	ev_time (void)	576	ev_time (void)
526	{	577	{
527	#if EV_USE_REALTIME	578	#if EV_USE_REALTIME
		579	if (expect_true (have_realtime))
		580	{
528	struct timespec ts;	581	struct timespec ts;
529	clock_gettime (CLOCK_REALTIME, &ts);	582	clock_gettime (CLOCK_REALTIME, &ts);
530	return ts.tv_sec + ts.tv_nsec * 1e-9;	583	return ts.tv_sec + ts.tv_nsec * 1e-9;
531	#else	584	}
		585	#endif
		586
532	struct timeval tv;	587	struct timeval tv;
533	gettimeofday (&tv, 0);	588	gettimeofday (&tv, 0);
534	return tv.tv_sec + tv.tv_usec * 1e-6;	589	return tv.tv_sec + tv.tv_usec * 1e-6;
535	#endif
536	}	590	}
		591	#endif
537		592
538	ev_tstamp inline_size	593	inline_size ev_tstamp
539	get_clock (void)	594	get_clock (void)
540	{	595	{
541	#if EV_USE_MONOTONIC	596	#if EV_USE_MONOTONIC
542	if (expect_true (have_monotonic))	597	if (expect_true (have_monotonic))
543	{	598	{
…		…
577		632
578	tv.tv_sec = (time_t)delay;	633	tv.tv_sec = (time_t)delay;
579	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	634	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
580		635
581	/* 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 */
582	/* somehting nto guaranteed by newer posix versions, but guaranteed */	637	/* somehting not guaranteed by newer posix versions, but guaranteed */
583	/* by older ones */	638	/* by older ones */
584	select (0, 0, 0, 0, &tv);	639	select (0, 0, 0, 0, &tv);
585	#endif	640	#endif
586	}	641	}
587	}	642	}
588		643
589	/*****************************************************************************/	644	/*****************************************************************************/
590		645
591	#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 */
592		647
593	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
594	array_nextsize (int elem, int cur, int cnt)	651	array_nextsize (int elem, int cur, int cnt)
595	{	652	{
596	int ncur = cur + 1;	653	int ncur = cur + 1;
597		654
598	do	655	do
…		…
639	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	696	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
640	}	697	}
641	#endif	698	#endif
642		699
643	#define array_free(stem, idx) \	700	#define array_free(stem, idx) \
644	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
645		702
646	/*****************************************************************************/	703	/*****************************************************************************/
		704
		705	/* dummy callback for pending events */
		706	static void noinline
		707	pendingcb (EV_P_ ev_prepare *w, int revents)
		708	{
		709	}
647		710
648	void noinline	711	void noinline
649	ev_feed_event (EV_P_ void *w, int revents)	712	ev_feed_event (EV_P_ void *w, int revents)
650	{	713	{
651	W w_ = (W)w;	714	W w_ = (W)w;
…		…
660	pendings [pri][w_->pending - 1].w = w_;	723	pendings [pri][w_->pending - 1].w = w_;
661	pendings [pri][w_->pending - 1].events = revents;	724	pendings [pri][w_->pending - 1].events = revents;
662	}	725	}
663	}	726	}
664		727
665	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
666	queue_events (EV_P_ W *events, int eventcnt, int type)	744	queue_events (EV_P_ W *events, int eventcnt, int type)
667	{	745	{
668	int i;	746	int i;
669		747
670	for (i = 0; i < eventcnt; ++i)	748	for (i = 0; i < eventcnt; ++i)
671	ev_feed_event (EV_A_ events [i], type);	749	ev_feed_event (EV_A_ events [i], type);
672	}	750	}
673		751
674	/*****************************************************************************/	752	/*****************************************************************************/
675		753
676	void inline_speed	754	inline_speed void
677	fd_event (EV_P_ int fd, int revents)	755	fd_event (EV_P_ int fd, int revents)
678	{	756	{
679	ANFD *anfd = anfds + fd;	757	ANFD *anfd = anfds + fd;
680	ev_io *w;	758	ev_io *w;
681		759
…		…
693	{	771	{
694	if (fd >= 0 && fd < anfdmax)	772	if (fd >= 0 && fd < anfdmax)
695	fd_event (EV_A_ fd, revents);	773	fd_event (EV_A_ fd, revents);
696	}	774	}
697		775
698	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
699	fd_reify (EV_P)	779	fd_reify (EV_P)
700	{	780	{
701	int i;	781	int i;
702		782
703	for (i = 0; i < fdchangecnt; ++i)	783	for (i = 0; i < fdchangecnt; ++i)
…		…
718	#ifdef EV_FD_TO_WIN32_HANDLE	798	#ifdef EV_FD_TO_WIN32_HANDLE
719	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	799	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
720	#else	800	#else
721	anfd->handle = _get_osfhandle (fd);	801	anfd->handle = _get_osfhandle (fd);
722	#endif	802	#endif
723	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));
724	}	804	}
725	#endif	805	#endif
726		806
727	{	807	{
728	unsigned char o_events = anfd->events;	808	unsigned char o_events = anfd->events;
729	unsigned char o_reify = anfd->reify;	809	unsigned char o_reify = anfd->reify;
730		810
731	anfd->reify = 0;	811	anfd->reify = 0;
732	anfd->events = events;	812	anfd->events = events;
733		813
734	if (o_events != events || o_reify & EV_IOFDSET)	814	if (o_events != events || o_reify & EV__IOFDSET)
735	backend_modify (EV_A_ fd, o_events, events);	815	backend_modify (EV_A_ fd, o_events, events);
736	}	816	}
737	}	817	}
738		818
739	fdchangecnt = 0;	819	fdchangecnt = 0;
740	}	820	}
741		821
742	void inline_size	822	/* something about the given fd changed */
		823	inline_size void
743	fd_change (EV_P_ int fd, int flags)	824	fd_change (EV_P_ int fd, int flags)
744	{	825	{
745	unsigned char reify = anfds [fd].reify;	826	unsigned char reify = anfds [fd].reify;
746	anfds [fd].reify |= flags;	827	anfds [fd].reify |= flags;
747		828
…		…
751	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	832	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
752	fdchanges [fdchangecnt - 1] = fd;	833	fdchanges [fdchangecnt - 1] = fd;
753	}	834	}
754	}	835	}
755		836
756	void inline_speed	837	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		838	inline_speed void
757	fd_kill (EV_P_ int fd)	839	fd_kill (EV_P_ int fd)
758	{	840	{
759	ev_io *w;	841	ev_io *w;
760		842
761	while ((w = (ev_io *)anfds [fd].head))	843	while ((w = (ev_io *)anfds [fd].head))
…		…
763	ev_io_stop (EV_A_ w);	845	ev_io_stop (EV_A_ w);
764	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);
765	}	847	}
766	}	848	}
767		849
768	int inline_size	850	/* check whether the given fd is atcually valid, for error recovery */
		851	inline_size int
769	fd_valid (int fd)	852	fd_valid (int fd)
770	{	853	{
771	#ifdef _WIN32	854	#ifdef _WIN32
772	return _get_osfhandle (fd) != -1;	855	return _get_osfhandle (fd) != -1;
773	#else	856	#else
…		…
810	for (fd = 0; fd < anfdmax; ++fd)	893	for (fd = 0; fd < anfdmax; ++fd)
811	if (anfds [fd].events)	894	if (anfds [fd].events)
812	{	895	{
813	anfds [fd].events = 0;	896	anfds [fd].events = 0;
814	anfds [fd].emask = 0;	897	anfds [fd].emask = 0;
815	fd_change (EV_A_ fd, EV_IOFDSET | 1);	898	fd_change (EV_A_ fd, EV__IOFDSET | 1);
816	}	899	}
817	}	900	}
818		901
819	/*****************************************************************************/	902	/*****************************************************************************/
820		903
…		…
836	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	919	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
837	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	920	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
838	#define UPHEAP_DONE(p,k) ((p) == (k))	921	#define UPHEAP_DONE(p,k) ((p) == (k))
839		922
840	/* away from the root */	923	/* away from the root */
841	void inline_speed	924	inline_speed void
842	downheap (ANHE *heap, int N, int k)	925	downheap (ANHE *heap, int N, int k)
843	{	926	{
844	ANHE he = heap [k];	927	ANHE he = heap [k];
845	ANHE *E = heap + N + HEAP0;	928	ANHE *E = heap + N + HEAP0;
846		929
…		…
886	#define HEAP0 1	969	#define HEAP0 1
887	#define HPARENT(k) ((k) >> 1)	970	#define HPARENT(k) ((k) >> 1)
888	#define UPHEAP_DONE(p,k) (!(p))	971	#define UPHEAP_DONE(p,k) (!(p))
889		972
890	/* away from the root */	973	/* away from the root */
891	void inline_speed	974	inline_speed void
892	downheap (ANHE *heap, int N, int k)	975	downheap (ANHE *heap, int N, int k)
893	{	976	{
894	ANHE he = heap [k];	977	ANHE he = heap [k];
895		978
896	for (;;)	979	for (;;)
…		…
916	ev_active (ANHE_w (he)) = k;	999	ev_active (ANHE_w (he)) = k;
917	}	1000	}
918	#endif	1001	#endif
919		1002
920	/* towards the root */	1003	/* towards the root */
921	void inline_speed	1004	inline_speed void
922	upheap (ANHE *heap, int k)	1005	upheap (ANHE *heap, int k)
923	{	1006	{
924	ANHE he = heap [k];	1007	ANHE he = heap [k];
925		1008
926	for (;;)	1009	for (;;)
…		…
937		1020
938	heap [k] = he;	1021	heap [k] = he;
939	ev_active (ANHE_w (he)) = k;	1022	ev_active (ANHE_w (he)) = k;
940	}	1023	}
941		1024
942	void inline_size	1025	/* move an element suitably so it is in a correct place */
		1026	inline_size void
943	adjustheap (ANHE *heap, int N, int k)	1027	adjustheap (ANHE *heap, int N, int k)
944	{	1028	{
945	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]))
946	upheap (heap, k);	1030	upheap (heap, k);
947	else	1031	else
948	downheap (heap, N, k);	1032	downheap (heap, N, k);
949	}	1033	}
950		1034
951	/* 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 */
952	void inline_size	1036	inline_size void
953	reheap (ANHE *heap, int N)	1037	reheap (ANHE *heap, int N)
954	{	1038	{
955	int i;	1039	int i;
956		1040
957	/* 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 */
…		…
960	upheap (heap, i + HEAP0);	1044	upheap (heap, i + HEAP0);
961	}	1045	}
962		1046
963	/*****************************************************************************/	1047	/*****************************************************************************/
964		1048
		1049	/* associate signal watchers to a signal signal */
965	typedef struct	1050	typedef struct
966	{	1051	{
967	WL head;	1052	WL head;
968	EV_ATOMIC_T gotsig;	1053	EV_ATOMIC_T gotsig;
969	} ANSIG;	1054	} ANSIG;
…		…
973		1058
974	static EV_ATOMIC_T gotsig;	1059	static EV_ATOMIC_T gotsig;
975		1060
976	/*****************************************************************************/	1061	/*****************************************************************************/
977		1062
978	void inline_speed	1063	/* used to prepare libev internal fd's */
		1064	/* this is not fork-safe */
		1065	inline_speed void
979	fd_intern (int fd)	1066	fd_intern (int fd)
980	{	1067	{
981	#ifdef _WIN32	1068	#ifdef _WIN32
982	unsigned long arg = 1;	1069	unsigned long arg = 1;
983	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1070	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
988	}	1075	}
989		1076
990	static void noinline	1077	static void noinline
991	evpipe_init (EV_P)	1078	evpipe_init (EV_P)
992	{	1079	{
993	if (!ev_is_active (&pipeev))	1080	if (!ev_is_active (&pipe_w))
994	{	1081	{
995	#if EV_USE_EVENTFD	1082	#if EV_USE_EVENTFD
996	if ((evfd = eventfd (0, 0)) >= 0)	1083	if ((evfd = eventfd (0, 0)) >= 0)
997	{	1084	{
998	evpipe [0] = -1;	1085	evpipe [0] = -1;
999	fd_intern (evfd);	1086	fd_intern (evfd);
1000	ev_io_set (&pipeev, evfd, EV_READ);	1087	ev_io_set (&pipe_w, evfd, EV_READ);
1001	}	1088	}
1002	else	1089	else
1003	#endif	1090	#endif
1004	{	1091	{
1005	while (pipe (evpipe))	1092	while (pipe (evpipe))
1006	ev_syserr ("(libev) error creating signal/async pipe");	1093	ev_syserr ("(libev) error creating signal/async pipe");
1007		1094
1008	fd_intern (evpipe [0]);	1095	fd_intern (evpipe [0]);
1009	fd_intern (evpipe [1]);	1096	fd_intern (evpipe [1]);
1010	ev_io_set (&pipeev, evpipe [0], EV_READ);	1097	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1011	}	1098	}
1012		1099
1013	ev_io_start (EV_A_ &pipeev);	1100	ev_io_start (EV_A_ &pipe_w);
1014	ev_unref (EV_A); /* watcher should not keep loop alive */	1101	ev_unref (EV_A); /* watcher should not keep loop alive */
1015	}	1102	}
1016	}	1103	}
1017		1104
1018	void inline_size	1105	inline_size void
1019	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1106	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1020	{	1107	{
1021	if (!*flag)	1108	if (!*flag)
1022	{	1109	{
1023	int old_errno = errno; /* save errno because write might clobber it */	1110	int old_errno = errno; /* save errno because write might clobber it */
…		…
1036		1123
1037	errno = old_errno;	1124	errno = old_errno;
1038	}	1125	}
1039	}	1126	}
1040		1127
		1128	/* called whenever the libev signal pipe */
		1129	/* got some events (signal, async) */
1041	static void	1130	static void
1042	pipecb (EV_P_ ev_io *iow, int revents)	1131	pipecb (EV_P_ ev_io *iow, int revents)
1043	{	1132	{
1044	#if EV_USE_EVENTFD	1133	#if EV_USE_EVENTFD
1045	if (evfd >= 0)	1134	if (evfd >= 0)
…		…
1101	ev_feed_signal_event (EV_P_ int signum)	1190	ev_feed_signal_event (EV_P_ int signum)
1102	{	1191	{
1103	WL w;	1192	WL w;
1104		1193
1105	#if EV_MULTIPLICITY	1194	#if EV_MULTIPLICITY
1106	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));
1107	#endif	1196	#endif
1108		1197
1109	--signum;	1198	--signum;
1110		1199
1111	if (signum < 0 || signum >= signalmax)	1200	if (signum < 0 || signum >= signalmax)
…		…
1127		1216
1128	#ifndef WIFCONTINUED	1217	#ifndef WIFCONTINUED
1129	# define WIFCONTINUED(status) 0	1218	# define WIFCONTINUED(status) 0
1130	#endif	1219	#endif
1131		1220
1132	void inline_speed	1221	/* handle a single child status event */
		1222	inline_speed void
1133	child_reap (EV_P_ int chain, int pid, int status)	1223	child_reap (EV_P_ int chain, int pid, int status)
1134	{	1224	{
1135	ev_child *w;	1225	ev_child *w;
1136	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1226	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1137		1227
…		…
1150		1240
1151	#ifndef WCONTINUED	1241	#ifndef WCONTINUED
1152	# define WCONTINUED 0	1242	# define WCONTINUED 0
1153	#endif	1243	#endif
1154		1244
		1245	/* called on sigchld etc., calls waitpid */
1155	static void	1246	static void
1156	childcb (EV_P_ ev_signal *sw, int revents)	1247	childcb (EV_P_ ev_signal *sw, int revents)
1157	{	1248	{
1158	int pid, status;	1249	int pid, status;
1159		1250
…		…
1240	/* kqueue is borked on everything but netbsd apparently */	1331	/* kqueue is borked on everything but netbsd apparently */
1241	/* 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 */
1242	flags &= ~EVBACKEND_KQUEUE;	1333	flags &= ~EVBACKEND_KQUEUE;
1243	#endif	1334	#endif
1244	#ifdef __APPLE__	1335	#ifdef __APPLE__
1245	// flags &= ~EVBACKEND_KQUEUE; for documentation	1336	/* only select works correctly on that "unix-certified" platform */
1246	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 */
1247	#endif	1339	#endif
1248		1340
1249	return flags;	1341	return flags;
1250	}	1342	}
1251		1343
…		…
1271	ev_loop_count (EV_P)	1363	ev_loop_count (EV_P)
1272	{	1364	{
1273	return loop_count;	1365	return loop_count;
1274	}	1366	}
1275		1367
		1368	unsigned int
		1369	ev_loop_depth (EV_P)
		1370	{
		1371	return loop_depth;
		1372	}
		1373
1276	void	1374	void
1277	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1375	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1278	{	1376	{
1279	io_blocktime = interval;	1377	io_blocktime = interval;
1280	}	1378	}
…		…
1283	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1381	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1284	{	1382	{
1285	timeout_blocktime = interval;	1383	timeout_blocktime = interval;
1286	}	1384	}
1287		1385
		1386	/* initialise a loop structure, must be zero-initialised */
1288	static void noinline	1387	static void noinline
1289	loop_init (EV_P_ unsigned int flags)	1388	loop_init (EV_P_ unsigned int flags)
1290	{	1389	{
1291	if (!backend)	1390	if (!backend)
1292	{	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
1293	#if EV_USE_MONOTONIC	1402	#if EV_USE_MONOTONIC
		1403	if (!have_monotonic)
1294	{	1404	{
1295	struct timespec ts;	1405	struct timespec ts;
		1406
1296	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1407	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1297	have_monotonic = 1;	1408	have_monotonic = 1;
1298	}	1409	}
1299	#endif	1410	#endif
1300		1411
1301	ev_rt_now = ev_time ();	1412	ev_rt_now = ev_time ();
1302	mn_now = get_clock ();	1413	mn_now = get_clock ();
1303	now_floor = mn_now;	1414	now_floor = mn_now;
…		…
1340	#endif	1451	#endif
1341	#if EV_USE_SELECT	1452	#if EV_USE_SELECT
1342	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1453	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1343	#endif	1454	#endif
1344		1455
		1456	ev_prepare_init (&pending_w, pendingcb);
		1457
1345	ev_init (&pipeev, pipecb);	1458	ev_init (&pipe_w, pipecb);
1346	ev_set_priority (&pipeev, EV_MAXPRI);	1459	ev_set_priority (&pipe_w, EV_MAXPRI);
1347	}	1460	}
1348	}	1461	}
1349		1462
		1463	/* free up a loop structure */
1350	static void noinline	1464	static void noinline
1351	loop_destroy (EV_P)	1465	loop_destroy (EV_P)
1352	{	1466	{
1353	int i;	1467	int i;
1354		1468
1355	if (ev_is_active (&pipeev))	1469	if (ev_is_active (&pipe_w))
1356	{	1470	{
1357	ev_ref (EV_A); /* signal watcher */	1471	ev_ref (EV_A); /* signal watcher */
1358	ev_io_stop (EV_A_ &pipeev);	1472	ev_io_stop (EV_A_ &pipe_w);
1359		1473
1360	#if EV_USE_EVENTFD	1474	#if EV_USE_EVENTFD
1361	if (evfd >= 0)	1475	if (evfd >= 0)
1362	close (evfd);	1476	close (evfd);
1363	#endif	1477	#endif
…		…
1402	}	1516	}
1403		1517
1404	ev_free (anfds); anfdmax = 0;	1518	ev_free (anfds); anfdmax = 0;
1405		1519
1406	/* have to use the microsoft-never-gets-it-right macro */	1520	/* have to use the microsoft-never-gets-it-right macro */
		1521	array_free (rfeed, EMPTY);
1407	array_free (fdchange, EMPTY);	1522	array_free (fdchange, EMPTY);
1408	array_free (timer, EMPTY);	1523	array_free (timer, EMPTY);
1409	#if EV_PERIODIC_ENABLE	1524	#if EV_PERIODIC_ENABLE
1410	array_free (periodic, EMPTY);	1525	array_free (periodic, EMPTY);
1411	#endif	1526	#endif
…		…
1420		1535
1421	backend = 0;	1536	backend = 0;
1422	}	1537	}
1423		1538
1424	#if EV_USE_INOTIFY	1539	#if EV_USE_INOTIFY
1425	void inline_size infy_fork (EV_P);	1540	inline_size void infy_fork (EV_P);
1426	#endif	1541	#endif
1427		1542
1428	void inline_size	1543	inline_size void
1429	loop_fork (EV_P)	1544	loop_fork (EV_P)
1430	{	1545	{
1431	#if EV_USE_PORT	1546	#if EV_USE_PORT
1432	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1547	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1433	#endif	1548	#endif
…		…
1439	#endif	1554	#endif
1440	#if EV_USE_INOTIFY	1555	#if EV_USE_INOTIFY
1441	infy_fork (EV_A);	1556	infy_fork (EV_A);
1442	#endif	1557	#endif
1443		1558
1444	if (ev_is_active (&pipeev))	1559	if (ev_is_active (&pipe_w))
1445	{	1560	{
1446	/* this "locks" the handlers against writing to the pipe */	1561	/* this "locks" the handlers against writing to the pipe */
1447	/* while we modify the fd vars */	1562	/* while we modify the fd vars */
1448	gotsig = 1;	1563	gotsig = 1;
1449	#if EV_ASYNC_ENABLE	1564	#if EV_ASYNC_ENABLE
1450	gotasync = 1;	1565	gotasync = 1;
1451	#endif	1566	#endif
1452		1567
1453	ev_ref (EV_A);	1568	ev_ref (EV_A);
1454	ev_io_stop (EV_A_ &pipeev);	1569	ev_io_stop (EV_A_ &pipe_w);
1455		1570
1456	#if EV_USE_EVENTFD	1571	#if EV_USE_EVENTFD
1457	if (evfd >= 0)	1572	if (evfd >= 0)
1458	close (evfd);	1573	close (evfd);
1459	#endif	1574	#endif
…		…
1464	close (evpipe [1]);	1579	close (evpipe [1]);
1465	}	1580	}
1466		1581
1467	evpipe_init (EV_A);	1582	evpipe_init (EV_A);
1468	/* now iterate over everything, in case we missed something */	1583	/* now iterate over everything, in case we missed something */
1469	pipecb (EV_A_ &pipeev, EV_READ);	1584	pipecb (EV_A_ &pipe_w, EV_READ);
1470	}	1585	}
1471		1586
1472	postfork = 0;	1587	postfork = 0;
1473	}	1588	}
1474		1589
…		…
1504		1619
1505	#if EV_VERIFY	1620	#if EV_VERIFY
1506	static void noinline	1621	static void noinline
1507	verify_watcher (EV_P_ W w)	1622	verify_watcher (EV_P_ W w)
1508	{	1623	{
1509	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1624	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1510		1625
1511	if (w->pending)	1626	if (w->pending)
1512	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	1627	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1513	}	1628	}
1514		1629
1515	static void noinline	1630	static void noinline
1516	verify_heap (EV_P_ ANHE *heap, int N)	1631	verify_heap (EV_P_ ANHE *heap, int N)
1517	{	1632	{
1518	int i;	1633	int i;
1519		1634
1520	for (i = HEAP0; i < N + HEAP0; ++i)	1635	for (i = HEAP0; i < N + HEAP0; ++i)
1521	{	1636	{
1522	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));	1637	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])));	1638	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]))));	1639	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1525		1640
1526	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1641	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1527	}	1642	}
1528	}	1643	}
1529		1644
1530	static void noinline	1645	static void noinline
1531	array_verify (EV_P_ W *ws, int cnt)	1646	array_verify (EV_P_ W *ws, int cnt)
1532	{	1647	{
1533	while (cnt--)	1648	while (cnt--)
1534	{	1649	{
1535	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1650	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1536	verify_watcher (EV_A_ ws [cnt]);	1651	verify_watcher (EV_A_ ws [cnt]);
1537	}	1652	}
1538	}	1653	}
1539	#endif	1654	#endif
1540		1655
…		…
1547		1662
1548	assert (activecnt >= -1);	1663	assert (activecnt >= -1);
1549		1664
1550	assert (fdchangemax >= fdchangecnt);	1665	assert (fdchangemax >= fdchangecnt);
1551	for (i = 0; i < fdchangecnt; ++i)	1666	for (i = 0; i < fdchangecnt; ++i)
1552	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1667	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1553		1668
1554	assert (anfdmax >= 0);	1669	assert (anfdmax >= 0);
1555	for (i = 0; i < anfdmax; ++i)	1670	for (i = 0; i < anfdmax; ++i)
1556	for (w = anfds [i].head; w; w = w->next)	1671	for (w = anfds [i].head; w; w = w->next)
1557	{	1672	{
1558	verify_watcher (EV_A_ (W)w);	1673	verify_watcher (EV_A_ (W)w);
1559	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1674	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));	1675	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1561	}	1676	}
1562		1677
1563	assert (timermax >= timercnt);	1678	assert (timermax >= timercnt);
1564	verify_heap (EV_A_ timers, timercnt);	1679	verify_heap (EV_A_ timers, timercnt);
1565		1680
…		…
1659	{	1774	{
1660	#if EV_MULTIPLICITY	1775	#if EV_MULTIPLICITY
1661	struct ev_loop *loop = ev_default_loop_ptr;	1776	struct ev_loop *loop = ev_default_loop_ptr;
1662	#endif	1777	#endif
1663		1778
1664	ev_loop_fork (EV_A);	1779	postfork = 1; /* must be in line with ev_loop_fork */
1665	}	1780	}
1666		1781
1667	/*****************************************************************************/	1782	/*****************************************************************************/
1668		1783
1669	void	1784	void
1670	ev_invoke (EV_P_ void *w, int revents)	1785	ev_invoke (EV_P_ void *w, int revents)
1671	{	1786	{
1672	EV_CB_INVOKE ((W)w, revents);	1787	EV_CB_INVOKE ((W)w, revents);
1673	}	1788	}
1674		1789
1675	void inline_speed	1790	inline_speed void
1676	call_pending (EV_P)	1791	call_pending (EV_P)
1677	{	1792	{
1678	int pri;	1793	int pri;
1679		1794
1680	for (pri = NUMPRI; pri--; )	1795	for (pri = NUMPRI; pri--; )
1681	while (pendingcnt [pri])	1796	while (pendingcnt [pri])
1682	{	1797	{
1683	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1798	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1684		1799
1685	if (expect_true (p->w))
1686	{
1687	/*assert (("non-pending watcher on pending list", p->w->pending));*/	1800	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1801	/* ^ this is no longer true, as pending_w could be here */
1688		1802
1689	p->w->pending = 0;	1803	p->w->pending = 0;
1690	EV_CB_INVOKE (p->w, p->events);	1804	EV_CB_INVOKE (p->w, p->events);
1691	EV_FREQUENT_CHECK;	1805	EV_FREQUENT_CHECK;
1692	}
1693	}	1806	}
1694	}	1807	}
1695		1808
1696	#if EV_IDLE_ENABLE	1809	#if EV_IDLE_ENABLE
1697	void inline_size	1810	/* make idle watchers pending. this handles the "call-idle */
		1811	/* only when higher priorities are idle" logic */
		1812	inline_size void
1698	idle_reify (EV_P)	1813	idle_reify (EV_P)
1699	{	1814	{
1700	if (expect_false (idleall))	1815	if (expect_false (idleall))
1701	{	1816	{
1702	int pri;	1817	int pri;
…		…
1714	}	1829	}
1715	}	1830	}
1716	}	1831	}
1717	#endif	1832	#endif
1718		1833
1719	void inline_size	1834	/* make timers pending */
		1835	inline_size void
1720	timers_reify (EV_P)	1836	timers_reify (EV_P)
1721	{	1837	{
1722	EV_FREQUENT_CHECK;	1838	EV_FREQUENT_CHECK;
1723		1839
1724	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1840	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1725	{	1841	{
1726	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1842	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	{	1843	{
		1844	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1845
		1846	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1847
		1848	/* first reschedule or stop timer */
		1849	if (w->repeat)
		1850	{
1733	ev_at (w) += w->repeat;	1851	ev_at (w) += w->repeat;
1734	if (ev_at (w) < mn_now)	1852	if (ev_at (w) < mn_now)
1735	ev_at (w) = mn_now;	1853	ev_at (w) = mn_now;
1736		1854
1737	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1855	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1738		1856
1739	ANHE_at_cache (timers [HEAP0]);	1857	ANHE_at_cache (timers [HEAP0]);
1740	downheap (timers, timercnt, HEAP0);	1858	downheap (timers, timercnt, HEAP0);
		1859	}
		1860	else
		1861	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1862
		1863	EV_FREQUENT_CHECK;
		1864	feed_reverse (EV_A_ (W)w);
1741	}	1865	}
1742	else	1866	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1743	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1744		1867
1745	EV_FREQUENT_CHECK;
1746	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1868	feed_reverse_done (EV_A_ EV_TIMEOUT);
1747	}	1869	}
1748	}	1870	}
1749		1871
1750	#if EV_PERIODIC_ENABLE	1872	#if EV_PERIODIC_ENABLE
1751	void inline_size	1873	/* make periodics pending */
		1874	inline_size void
1752	periodics_reify (EV_P)	1875	periodics_reify (EV_P)
1753	{	1876	{
1754	EV_FREQUENT_CHECK;	1877	EV_FREQUENT_CHECK;
1755		1878
1756	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1879	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1757	{	1880	{
1758	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1881	int feed_count = 0;
1759		1882
1760	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1883	do
1761
1762	/* first reschedule or stop timer */
1763	if (w->reschedule_cb)
1764	{	1884	{
		1885	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1886
		1887	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		1888
		1889	/* first reschedule or stop timer */
		1890	if (w->reschedule_cb)
		1891	{
1765	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1892	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1766		1893
1767	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1894	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1768		1895
1769	ANHE_at_cache (periodics [HEAP0]);	1896	ANHE_at_cache (periodics [HEAP0]);
1770	downheap (periodics, periodiccnt, HEAP0);	1897	downheap (periodics, periodiccnt, HEAP0);
		1898	}
		1899	else if (w->interval)
		1900	{
		1901	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1902	/* if next trigger time is not sufficiently in the future, put it there */
		1903	/* this might happen because of floating point inexactness */
		1904	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1905	{
		1906	ev_at (w) += w->interval;
		1907
		1908	/* if interval is unreasonably low we might still have a time in the past */
		1909	/* so correct this. this will make the periodic very inexact, but the user */
		1910	/* has effectively asked to get triggered more often than possible */
		1911	if (ev_at (w) < ev_rt_now)
		1912	ev_at (w) = ev_rt_now;
		1913	}
		1914
		1915	ANHE_at_cache (periodics [HEAP0]);
		1916	downheap (periodics, periodiccnt, HEAP0);
		1917	}
		1918	else
		1919	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1920
		1921	EV_FREQUENT_CHECK;
		1922	feed_reverse (EV_A_ (W)w);
1771	}	1923	}
1772	else if (w->interval)	1924	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		1925
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);	1926	feed_reverse_done (EV_A_ EV_PERIODIC);
1796	}	1927	}
1797	}	1928	}
1798		1929
		1930	/* simply recalculate all periodics */
		1931	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1799	static void noinline	1932	static void noinline
1800	periodics_reschedule (EV_P)	1933	periodics_reschedule (EV_P)
1801	{	1934	{
1802	int i;	1935	int i;
1803		1936
…		…
1816		1949
1817	reheap (periodics, periodiccnt);	1950	reheap (periodics, periodiccnt);
1818	}	1951	}
1819	#endif	1952	#endif
1820		1953
1821	void inline_speed	1954	/* adjust all timers by a given offset */
		1955	static void noinline
		1956	timers_reschedule (EV_P_ ev_tstamp adjust)
		1957	{
		1958	int i;
		1959
		1960	for (i = 0; i < timercnt; ++i)
		1961	{
		1962	ANHE *he = timers + i + HEAP0;
		1963	ANHE_w (*he)->at += adjust;
		1964	ANHE_at_cache (*he);
		1965	}
		1966	}
		1967
		1968	/* fetch new monotonic and realtime times from the kernel */
		1969	/* also detetc if there was a timejump, and act accordingly */
		1970	inline_speed void
1822	time_update (EV_P_ ev_tstamp max_block)	1971	time_update (EV_P_ ev_tstamp max_block)
1823	{	1972	{
1824	int i;
1825
1826	#if EV_USE_MONOTONIC	1973	#if EV_USE_MONOTONIC
1827	if (expect_true (have_monotonic))	1974	if (expect_true (have_monotonic))
1828	{	1975	{
		1976	int i;
1829	ev_tstamp odiff = rtmn_diff;	1977	ev_tstamp odiff = rtmn_diff;
1830		1978
1831	mn_now = get_clock ();	1979	mn_now = get_clock ();
1832		1980
1833	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1981	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1859	ev_rt_now = ev_time ();	2007	ev_rt_now = ev_time ();
1860	mn_now = get_clock ();	2008	mn_now = get_clock ();
1861	now_floor = mn_now;	2009	now_floor = mn_now;
1862	}	2010	}
1863		2011
		2012	/* no timer adjustment, as the monotonic clock doesn't jump */
		2013	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1864	# if EV_PERIODIC_ENABLE	2014	# if EV_PERIODIC_ENABLE
1865	periodics_reschedule (EV_A);	2015	periodics_reschedule (EV_A);
1866	# endif	2016	# endif
1867	/* no timer adjustment, as the monotonic clock doesn't jump */
1868	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1869	}	2017	}
1870	else	2018	else
1871	#endif	2019	#endif
1872	{	2020	{
1873	ev_rt_now = ev_time ();	2021	ev_rt_now = ev_time ();
1874		2022
1875	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2023	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1876	{	2024	{
		2025	/* adjust timers. this is easy, as the offset is the same for all of them */
		2026	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1877	#if EV_PERIODIC_ENABLE	2027	#if EV_PERIODIC_ENABLE
1878	periodics_reschedule (EV_A);	2028	periodics_reschedule (EV_A);
1879	#endif	2029	#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	}	2030	}
1888		2031
1889	mn_now = ev_rt_now;	2032	mn_now = ev_rt_now;
1890	}	2033	}
1891	}	2034	}
1892		2035
1893	void	2036	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	}
1910
1911	static int loop_done;
1912
1913	void
1914	ev_loop (EV_P_ int flags)	2037	ev_loop (EV_P_ int flags)
1915	{	2038	{
		2039	++loop_depth;
		2040
1916	loop_done = EVUNLOOP_CANCEL;	2041	loop_done = EVUNLOOP_CANCEL;
1917		2042
1918	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2043	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1919		2044
1920	do	2045	do
…		…
1947	{	2072	{
1948	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2073	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1949	call_pending (EV_A);	2074	call_pending (EV_A);
1950	}	2075	}
1951		2076
1952	if (expect_false (!activecnt))
1953	break;
1954
1955	/* we might have forked, so reify kernel state if necessary */	2077	/* we might have forked, so reify kernel state if necessary */
1956	if (expect_false (postfork))	2078	if (expect_false (postfork))
1957	loop_fork (EV_A);	2079	loop_fork (EV_A);
1958		2080
1959	/* update fd-related kernel structures */	2081	/* update fd-related kernel structures */
…		…
1964	ev_tstamp waittime = 0.;	2086	ev_tstamp waittime = 0.;
1965	ev_tstamp sleeptime = 0.;	2087	ev_tstamp sleeptime = 0.;
1966		2088
1967	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2089	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1968	{	2090	{
		2091	/* remember old timestamp for io_blocktime calculation */
		2092	ev_tstamp prev_mn_now = mn_now;
		2093
1969	/* update time to cancel out callback processing overhead */	2094	/* update time to cancel out callback processing overhead */
1970	time_update (EV_A_ 1e100);	2095	time_update (EV_A_ 1e100);
1971		2096
1972	waittime = MAX_BLOCKTIME;	2097	waittime = MAX_BLOCKTIME;
1973		2098
…		…
1983	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2108	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1984	if (waittime > to) waittime = to;	2109	if (waittime > to) waittime = to;
1985	}	2110	}
1986	#endif	2111	#endif
1987		2112
		2113	/* don't let timeouts decrease the waittime below timeout_blocktime */
1988	if (expect_false (waittime < timeout_blocktime))	2114	if (expect_false (waittime < timeout_blocktime))
1989	waittime = timeout_blocktime;	2115	waittime = timeout_blocktime;
1990		2116
1991	sleeptime = waittime - backend_fudge;	2117	/* extra check because io_blocktime is commonly 0 */
1992
1993	if (expect_true (sleeptime > io_blocktime))	2118	if (expect_false (io_blocktime))
1994	sleeptime = io_blocktime;
1995
1996	if (sleeptime)
1997	{	2119	{
		2120	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2121
		2122	if (sleeptime > waittime - backend_fudge)
		2123	sleeptime = waittime - backend_fudge;
		2124
		2125	if (expect_true (sleeptime > 0.))
		2126	{
1998	ev_sleep (sleeptime);	2127	ev_sleep (sleeptime);
1999	waittime -= sleeptime;	2128	waittime -= sleeptime;
		2129	}
2000	}	2130	}
2001	}	2131	}
2002		2132
2003	++loop_count;	2133	++loop_count;
2004	backend_poll (EV_A_ waittime);	2134	backend_poll (EV_A_ waittime);
…		…
2030	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2160	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2031	));	2161	));
2032		2162
2033	if (loop_done == EVUNLOOP_ONE)	2163	if (loop_done == EVUNLOOP_ONE)
2034	loop_done = EVUNLOOP_CANCEL;	2164	loop_done = EVUNLOOP_CANCEL;
		2165
		2166	--loop_depth;
2035	}	2167	}
2036		2168
2037	void	2169	void
2038	ev_unloop (EV_P_ int how)	2170	ev_unloop (EV_P_ int how)
2039	{	2171	{
2040	loop_done = how;	2172	loop_done = how;
2041	}	2173	}
2042		2174
		2175	void
		2176	ev_ref (EV_P)
		2177	{
		2178	++activecnt;
		2179	}
		2180
		2181	void
		2182	ev_unref (EV_P)
		2183	{
		2184	--activecnt;
		2185	}
		2186
		2187	void
		2188	ev_now_update (EV_P)
		2189	{
		2190	time_update (EV_A_ 1e100);
		2191	}
		2192
		2193	void
		2194	ev_suspend (EV_P)
		2195	{
		2196	ev_now_update (EV_A);
		2197	}
		2198
		2199	void
		2200	ev_resume (EV_P)
		2201	{
		2202	ev_tstamp mn_prev = mn_now;
		2203
		2204	ev_now_update (EV_A);
		2205	timers_reschedule (EV_A_ mn_now - mn_prev);
		2206	#if EV_PERIODIC_ENABLE
		2207	/* TODO: really do this? */
		2208	periodics_reschedule (EV_A);
		2209	#endif
		2210	}
		2211
2043	/*****************************************************************************/	2212	/*****************************************************************************/
		2213	/* singly-linked list management, used when the expected list length is short */
2044		2214
2045	void inline_size	2215	inline_size void
2046	wlist_add (WL *head, WL elem)	2216	wlist_add (WL *head, WL elem)
2047	{	2217	{
2048	elem->next = *head;	2218	elem->next = *head;
2049	*head = elem;	2219	*head = elem;
2050	}	2220	}
2051		2221
2052	void inline_size	2222	inline_size void
2053	wlist_del (WL *head, WL elem)	2223	wlist_del (WL *head, WL elem)
2054	{	2224	{
2055	while (*head)	2225	while (*head)
2056	{	2226	{
2057	if (*head == elem)	2227	if (*head == elem)
…		…
2062		2232
2063	head = &(*head)->next;	2233	head = &(*head)->next;
2064	}	2234	}
2065	}	2235	}
2066		2236
2067	void inline_speed	2237	/* internal, faster, version of ev_clear_pending */
		2238	inline_speed void
2068	clear_pending (EV_P_ W w)	2239	clear_pending (EV_P_ W w)
2069	{	2240	{
2070	if (w->pending)	2241	if (w->pending)
2071	{	2242	{
2072	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2243	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2073	w->pending = 0;	2244	w->pending = 0;
2074	}	2245	}
2075	}	2246	}
2076		2247
2077	int	2248	int
…		…
2081	int pending = w_->pending;	2252	int pending = w_->pending;
2082		2253
2083	if (expect_true (pending))	2254	if (expect_true (pending))
2084	{	2255	{
2085	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2256	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2257	p->w = (W)&pending_w;
2086	w_->pending = 0;	2258	w_->pending = 0;
2087	p->w = 0;
2088	return p->events;	2259	return p->events;
2089	}	2260	}
2090	else	2261	else
2091	return 0;	2262	return 0;
2092	}	2263	}
2093		2264
2094	void inline_size	2265	inline_size void
2095	pri_adjust (EV_P_ W w)	2266	pri_adjust (EV_P_ W w)
2096	{	2267	{
2097	int pri = w->priority;	2268	int pri = ev_priority (w);
2098	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2269	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2099	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2270	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2100	w->priority = pri;	2271	ev_set_priority (w, pri);
2101	}	2272	}
2102		2273
2103	void inline_speed	2274	inline_speed void
2104	ev_start (EV_P_ W w, int active)	2275	ev_start (EV_P_ W w, int active)
2105	{	2276	{
2106	pri_adjust (EV_A_ w);	2277	pri_adjust (EV_A_ w);
2107	w->active = active;	2278	w->active = active;
2108	ev_ref (EV_A);	2279	ev_ref (EV_A);
2109	}	2280	}
2110		2281
2111	void inline_size	2282	inline_size void
2112	ev_stop (EV_P_ W w)	2283	ev_stop (EV_P_ W w)
2113	{	2284	{
2114	ev_unref (EV_A);	2285	ev_unref (EV_A);
2115	w->active = 0;	2286	w->active = 0;
2116	}	2287	}
…		…
2123	int fd = w->fd;	2294	int fd = w->fd;
2124		2295
2125	if (expect_false (ev_is_active (w)))	2296	if (expect_false (ev_is_active (w)))
2126	return;	2297	return;
2127		2298
2128	assert (("ev_io_start called with negative fd", fd >= 0));	2299	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))));	2300	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2130		2301
2131	EV_FREQUENT_CHECK;	2302	EV_FREQUENT_CHECK;
2132		2303
2133	ev_start (EV_A_ (W)w, 1);	2304	ev_start (EV_A_ (W)w, 1);
2134	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2305	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2135	wlist_add (&anfds[fd].head, (WL)w);	2306	wlist_add (&anfds[fd].head, (WL)w);
2136		2307
2137	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2308	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2138	w->events &= ~EV_IOFDSET;	2309	w->events &= ~EV__IOFDSET;
2139		2310
2140	EV_FREQUENT_CHECK;	2311	EV_FREQUENT_CHECK;
2141	}	2312	}
2142		2313
2143	void noinline	2314	void noinline
…		…
2145	{	2316	{
2146	clear_pending (EV_A_ (W)w);	2317	clear_pending (EV_A_ (W)w);
2147	if (expect_false (!ev_is_active (w)))	2318	if (expect_false (!ev_is_active (w)))
2148	return;	2319	return;
2149		2320
2150	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2321	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2151		2322
2152	EV_FREQUENT_CHECK;	2323	EV_FREQUENT_CHECK;
2153		2324
2154	wlist_del (&anfds[w->fd].head, (WL)w);	2325	wlist_del (&anfds[w->fd].head, (WL)w);
2155	ev_stop (EV_A_ (W)w);	2326	ev_stop (EV_A_ (W)w);
…		…
2165	if (expect_false (ev_is_active (w)))	2336	if (expect_false (ev_is_active (w)))
2166	return;	2337	return;
2167		2338
2168	ev_at (w) += mn_now;	2339	ev_at (w) += mn_now;
2169		2340
2170	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2341	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2171		2342
2172	EV_FREQUENT_CHECK;	2343	EV_FREQUENT_CHECK;
2173		2344
2174	++timercnt;	2345	++timercnt;
2175	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2346	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2178	ANHE_at_cache (timers [ev_active (w)]);	2349	ANHE_at_cache (timers [ev_active (w)]);
2179	upheap (timers, ev_active (w));	2350	upheap (timers, ev_active (w));
2180		2351
2181	EV_FREQUENT_CHECK;	2352	EV_FREQUENT_CHECK;
2182		2353
2183	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2354	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2184	}	2355	}
2185		2356
2186	void noinline	2357	void noinline
2187	ev_timer_stop (EV_P_ ev_timer *w)	2358	ev_timer_stop (EV_P_ ev_timer *w)
2188	{	2359	{
…		…
2193	EV_FREQUENT_CHECK;	2364	EV_FREQUENT_CHECK;
2194		2365
2195	{	2366	{
2196	int active = ev_active (w);	2367	int active = ev_active (w);
2197		2368
2198	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2369	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2199		2370
2200	--timercnt;	2371	--timercnt;
2201		2372
2202	if (expect_true (active < timercnt + HEAP0))	2373	if (expect_true (active < timercnt + HEAP0))
2203	{	2374	{
…		…
2247		2418
2248	if (w->reschedule_cb)	2419	if (w->reschedule_cb)
2249	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2420	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2250	else if (w->interval)	2421	else if (w->interval)
2251	{	2422	{
2252	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2423	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 */	2424	/* 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;	2425	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2255	}	2426	}
2256	else	2427	else
2257	ev_at (w) = w->offset;	2428	ev_at (w) = w->offset;
…		…
2265	ANHE_at_cache (periodics [ev_active (w)]);	2436	ANHE_at_cache (periodics [ev_active (w)]);
2266	upheap (periodics, ev_active (w));	2437	upheap (periodics, ev_active (w));
2267		2438
2268	EV_FREQUENT_CHECK;	2439	EV_FREQUENT_CHECK;
2269		2440
2270	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2441	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2271	}	2442	}
2272		2443
2273	void noinline	2444	void noinline
2274	ev_periodic_stop (EV_P_ ev_periodic *w)	2445	ev_periodic_stop (EV_P_ ev_periodic *w)
2275	{	2446	{
…		…
2280	EV_FREQUENT_CHECK;	2451	EV_FREQUENT_CHECK;
2281		2452
2282	{	2453	{
2283	int active = ev_active (w);	2454	int active = ev_active (w);
2284		2455
2285	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2456	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2286		2457
2287	--periodiccnt;	2458	--periodiccnt;
2288		2459
2289	if (expect_true (active < periodiccnt + HEAP0))	2460	if (expect_true (active < periodiccnt + HEAP0))
2290	{	2461	{
…		…
2313		2484
2314	void noinline	2485	void noinline
2315	ev_signal_start (EV_P_ ev_signal *w)	2486	ev_signal_start (EV_P_ ev_signal *w)
2316	{	2487	{
2317	#if EV_MULTIPLICITY	2488	#if EV_MULTIPLICITY
2318	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2489	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2319	#endif	2490	#endif
2320	if (expect_false (ev_is_active (w)))	2491	if (expect_false (ev_is_active (w)))
2321	return;	2492	return;
2322		2493
2323	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2494	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2324		2495
2325	evpipe_init (EV_A);	2496	evpipe_init (EV_A);
2326		2497
2327	EV_FREQUENT_CHECK;	2498	EV_FREQUENT_CHECK;
2328		2499
…		…
2379		2550
2380	void	2551	void
2381	ev_child_start (EV_P_ ev_child *w)	2552	ev_child_start (EV_P_ ev_child *w)
2382	{	2553	{
2383	#if EV_MULTIPLICITY	2554	#if EV_MULTIPLICITY
2384	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2555	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2385	#endif	2556	#endif
2386	if (expect_false (ev_is_active (w)))	2557	if (expect_false (ev_is_active (w)))
2387	return;	2558	return;
2388		2559
2389	EV_FREQUENT_CHECK;	2560	EV_FREQUENT_CHECK;
…		…
2414	# ifdef _WIN32	2585	# ifdef _WIN32
2415	# undef lstat	2586	# undef lstat
2416	# define lstat(a,b) _stati64 (a,b)	2587	# define lstat(a,b) _stati64 (a,b)
2417	# endif	2588	# endif
2418		2589
2419	#define DEF_STAT_INTERVAL 5.0074891	2590	#define DEF_STAT_INTERVAL 5.0074891
		2591	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2420	#define MIN_STAT_INTERVAL 0.1074891	2592	#define MIN_STAT_INTERVAL 0.1074891
2421		2593
2422	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2594	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2423		2595
2424	#if EV_USE_INOTIFY	2596	#if EV_USE_INOTIFY
2425	# define EV_INOTIFY_BUFSIZE 8192	2597	# define EV_INOTIFY_BUFSIZE 8192
…		…
2429	{	2601	{
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);	2602	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		2603
2432	if (w->wd < 0)	2604	if (w->wd < 0)
2433	{	2605	{
		2606	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 */	2607	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2435		2608
2436	/* monitor some parent directory for speedup hints */	2609	/* monitor some parent directory for speedup hints */
2437	/* note that exceeding the hardcoded limit is not a correctness issue, */	2610	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2438	/* but an efficiency issue only */	2611	/* but an efficiency issue only */
2439	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2612	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2440	{	2613	{
2441	char path [4096];	2614	char path [4096];
2442	strcpy (path, w->path);	2615	strcpy (path, w->path);
…		…
2446	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2619	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2447	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2620	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2448		2621
2449	char *pend = strrchr (path, '/');	2622	char *pend = strrchr (path, '/');
2450		2623
2451	if (!pend)	2624	if (!pend || pend == path)
2452	break; /* whoops, no '/', complain to your admin */	2625	break;
2453		2626
2454	*pend = 0;	2627	*pend = 0;
2455	w->wd = inotify_add_watch (fs_fd, path, mask);	2628	w->wd = inotify_add_watch (fs_fd, path, mask);
2456	}	2629	}
2457	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2630	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2458	}	2631	}
2459	}	2632	}
2460	else
2461	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2462		2633
2463	if (w->wd >= 0)	2634	if (w->wd >= 0)
		2635	{
2464	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2636	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2637
		2638	/* now local changes will be tracked by inotify, but remote changes won't */
		2639	/* unless the filesystem it known to be local, we therefore still poll */
		2640	/* also do poll on <2.6.25, but with normal frequency */
		2641	struct statfs sfs;
		2642
		2643	if (fs_2625 && !statfs (w->path, &sfs))
		2644	if (sfs.f_type == 0x1373 /* devfs */
		2645	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2646	|| sfs.f_type == 0x3153464a /* jfs */
		2647	|| sfs.f_type == 0x52654973 /* reiser3 */
		2648	|| sfs.f_type == 0x01021994 /* tempfs */
		2649	|| sfs.f_type == 0x58465342 /* xfs */)
		2650	return;
		2651
		2652	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2653	ev_timer_again (EV_A_ &w->timer);
		2654	}
2465	}	2655	}
2466		2656
2467	static void noinline	2657	static void noinline
2468	infy_del (EV_P_ ev_stat *w)	2658	infy_del (EV_P_ ev_stat *w)
2469	{	2659	{
…		…
2499		2689
2500	if (w->wd == wd || wd == -1)	2690	if (w->wd == wd || wd == -1)
2501	{	2691	{
2502	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2692	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2503	{	2693	{
		2694	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2504	w->wd = -1;	2695	w->wd = -1;
2505	infy_add (EV_A_ w); /* re-add, no matter what */	2696	infy_add (EV_A_ w); /* re-add, no matter what */
2506	}	2697	}
2507		2698
2508	stat_timer_cb (EV_A_ &w->timer, 0);	2699	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2521		2712
2522	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2713	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2523	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2714	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2524	}	2715	}
2525		2716
2526	void inline_size	2717	inline_size void
2527	infy_init (EV_P)	2718	check_2625 (EV_P)
2528	{	2719	{
2529	if (fs_fd != -2)
2530	return;
2531
2532	/* kernels < 2.6.25 are borked	2720	/* kernels < 2.6.25 are borked
2533	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2721	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2534	*/	2722	*/
2535	{
2536	struct utsname buf;	2723	struct utsname buf;
2537	int major, minor, micro;	2724	int major, minor, micro;
2538		2725
2539	fs_fd = -1;
2540
2541	if (uname (&buf))	2726	if (uname (&buf))
2542	return;	2727	return;
2543		2728
2544	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2729	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2545	return;	2730	return;
2546		2731
2547	if (major < 2	2732	if (major < 2
2548	|| (major == 2 && minor < 6)	2733	|| (major == 2 && minor < 6)
2549	|| (major == 2 && minor == 6 && micro < 25))	2734	|| (major == 2 && minor == 6 && micro < 25))
2550	return;	2735	return;
2551	}	2736
		2737	fs_2625 = 1;
		2738	}
		2739
		2740	inline_size void
		2741	infy_init (EV_P)
		2742	{
		2743	if (fs_fd != -2)
		2744	return;
		2745
		2746	fs_fd = -1;
		2747
		2748	check_2625 (EV_A);
2552		2749
2553	fs_fd = inotify_init ();	2750	fs_fd = inotify_init ();
2554		2751
2555	if (fs_fd >= 0)	2752	if (fs_fd >= 0)
2556	{	2753	{
…		…
2558	ev_set_priority (&fs_w, EV_MAXPRI);	2755	ev_set_priority (&fs_w, EV_MAXPRI);
2559	ev_io_start (EV_A_ &fs_w);	2756	ev_io_start (EV_A_ &fs_w);
2560	}	2757	}
2561	}	2758	}
2562		2759
2563	void inline_size	2760	inline_size void
2564	infy_fork (EV_P)	2761	infy_fork (EV_P)
2565	{	2762	{
2566	int slot;	2763	int slot;
2567		2764
2568	if (fs_fd < 0)	2765	if (fs_fd < 0)
…		…
2584	w->wd = -1;	2781	w->wd = -1;
2585		2782
2586	if (fs_fd >= 0)	2783	if (fs_fd >= 0)
2587	infy_add (EV_A_ w); /* re-add, no matter what */	2784	infy_add (EV_A_ w); /* re-add, no matter what */
2588	else	2785	else
2589	ev_timer_start (EV_A_ &w->timer);	2786	ev_timer_again (EV_A_ &w->timer);
2590	}	2787	}
2591	}	2788	}
2592	}	2789	}
2593		2790
2594	#endif	2791	#endif
…		…
2649	ev_stat_start (EV_P_ ev_stat *w)	2846	ev_stat_start (EV_P_ ev_stat *w)
2650	{	2847	{
2651	if (expect_false (ev_is_active (w)))	2848	if (expect_false (ev_is_active (w)))
2652	return;	2849	return;
2653		2850
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);	2851	ev_stat_stat (EV_A_ w);
2659		2852
		2853	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2660	if (w->interval < MIN_STAT_INTERVAL)	2854	w->interval = MIN_STAT_INTERVAL;
2661	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2662		2855
2663	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2856	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));	2857	ev_set_priority (&w->timer, ev_priority (w));
2665		2858
2666	#if EV_USE_INOTIFY	2859	#if EV_USE_INOTIFY
2667	infy_init (EV_A);	2860	infy_init (EV_A);
2668		2861
2669	if (fs_fd >= 0)	2862	if (fs_fd >= 0)
2670	infy_add (EV_A_ w);	2863	infy_add (EV_A_ w);
2671	else	2864	else
2672	#endif	2865	#endif
2673	ev_timer_start (EV_A_ &w->timer);	2866	ev_timer_again (EV_A_ &w->timer);
2674		2867
2675	ev_start (EV_A_ (W)w, 1);	2868	ev_start (EV_A_ (W)w, 1);
2676		2869
2677	EV_FREQUENT_CHECK;	2870	EV_FREQUENT_CHECK;
2678	}	2871	}
…		…
2853	static void	3046	static void
2854	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3047	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2855	{	3048	{
2856	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3049	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2857		3050
		3051	ev_embed_stop (EV_A_ w);
		3052
2858	{	3053	{
2859	struct ev_loop *loop = w->other;	3054	struct ev_loop *loop = w->other;
2860		3055
2861	ev_loop_fork (EV_A);	3056	ev_loop_fork (EV_A);
		3057	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2862	}	3058	}
		3059
		3060	ev_embed_start (EV_A_ w);
2863	}	3061	}
2864		3062
2865	#if 0	3063	#if 0
2866	static void	3064	static void
2867	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3065	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2876	if (expect_false (ev_is_active (w)))	3074	if (expect_false (ev_is_active (w)))
2877	return;	3075	return;
2878		3076
2879	{	3077	{
2880	struct ev_loop *loop = w->other;	3078	struct ev_loop *loop = w->other;
2881	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3079	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);	3080	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2883	}	3081	}
2884		3082
2885	EV_FREQUENT_CHECK;	3083	EV_FREQUENT_CHECK;
2886		3084
…		…
3069	ev_timer_set (&once->to, timeout, 0.);	3267	ev_timer_set (&once->to, timeout, 0.);
3070	ev_timer_start (EV_A_ &once->to);	3268	ev_timer_start (EV_A_ &once->to);
3071	}	3269	}
3072	}	3270	}
3073		3271
		3272	/*****************************************************************************/
		3273
		3274	#if EV_WALK_ENABLE
		3275	void
		3276	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3277	{
		3278	int i, j;
		3279	ev_watcher_list *wl, *wn;
		3280
		3281	if (types & (EV_IO | EV_EMBED))
		3282	for (i = 0; i < anfdmax; ++i)
		3283	for (wl = anfds [i].head; wl; )
		3284	{
		3285	wn = wl->next;
		3286
		3287	#if EV_EMBED_ENABLE
		3288	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3289	{
		3290	if (types & EV_EMBED)
		3291	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3292	}
		3293	else
		3294	#endif
		3295	#if EV_USE_INOTIFY
		3296	if (ev_cb ((ev_io *)wl) == infy_cb)
		3297	;
		3298	else
		3299	#endif
		3300	if ((ev_io *)wl != &pipe_w)
		3301	if (types & EV_IO)
		3302	cb (EV_A_ EV_IO, wl);
		3303
		3304	wl = wn;
		3305	}
		3306
		3307	if (types & (EV_TIMER | EV_STAT))
		3308	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3309	#if EV_STAT_ENABLE
		3310	/*TODO: timer is not always active*/
		3311	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3312	{
		3313	if (types & EV_STAT)
		3314	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3315	}
		3316	else
		3317	#endif
		3318	if (types & EV_TIMER)
		3319	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3320
		3321	#if EV_PERIODIC_ENABLE
		3322	if (types & EV_PERIODIC)
		3323	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3324	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3325	#endif
		3326
		3327	#if EV_IDLE_ENABLE
		3328	if (types & EV_IDLE)
		3329	for (j = NUMPRI; i--; )
		3330	for (i = idlecnt [j]; i--; )
		3331	cb (EV_A_ EV_IDLE, idles [j][i]);
		3332	#endif
		3333
		3334	#if EV_FORK_ENABLE
		3335	if (types & EV_FORK)
		3336	for (i = forkcnt; i--; )
		3337	if (ev_cb (forks [i]) != embed_fork_cb)
		3338	cb (EV_A_ EV_FORK, forks [i]);
		3339	#endif
		3340
		3341	#if EV_ASYNC_ENABLE
		3342	if (types & EV_ASYNC)
		3343	for (i = asynccnt; i--; )
		3344	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3345	#endif
		3346
		3347	if (types & EV_PREPARE)
		3348	for (i = preparecnt; i--; )
		3349	#if EV_EMBED_ENABLE
		3350	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3351	#endif
		3352	cb (EV_A_ EV_PREPARE, prepares [i]);
		3353
		3354	if (types & EV_CHECK)
		3355	for (i = checkcnt; i--; )
		3356	cb (EV_A_ EV_CHECK, checks [i]);
		3357
		3358	if (types & EV_SIGNAL)
		3359	for (i = 0; i < signalmax; ++i)
		3360	for (wl = signals [i].head; wl; )
		3361	{
		3362	wn = wl->next;
		3363	cb (EV_A_ EV_SIGNAL, wl);
		3364	wl = wn;
		3365	}
		3366
		3367	if (types & EV_CHILD)
		3368	for (i = EV_PID_HASHSIZE; i--; )
		3369	for (wl = childs [i]; wl; )
		3370	{
		3371	wn = wl->next;
		3372	cb (EV_A_ EV_CHILD, wl);
		3373	wl = wn;
		3374	}
		3375	/* EV_STAT 0x00001000 /* stat data changed */
		3376	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3377	}
		3378	#endif
		3379
3074	#if EV_MULTIPLICITY	3380	#if EV_MULTIPLICITY
3075	#include "ev_wrap.h"	3381	#include "ev_wrap.h"
3076	#endif	3382	#endif
3077		3383
3078	#ifdef __cplusplus	3384	#ifdef __cplusplus

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