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Comparing libev/ev.c (file contents):
Revision 1.267 by root, Mon Oct 27 11:08:29 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"
…		…
388	{	434	{
389	syserr_cb = cb;	435	syserr_cb = cb;
390	}	436	}
391		437
392	static void noinline	438	static void noinline
393	syserr (const char *msg)	439	ev_syserr (const char *msg)
394	{	440	{
395	if (!msg)	441	if (!msg)
396	msg = "(libev) system error";	442	msg = "(libev) system error";
397		443
398	if (syserr_cb)	444	if (syserr_cb)
…		…
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 */
		502	unsigned char unused;
		503	#if EV_USE_EPOLL
455	unsigned char egen; /* generation counter to counter epoll bugs */	504	unsigned int egen; /* generation counter to counter epoll bugs */
		505	#endif
456	#if EV_SELECT_IS_WINSOCKET	506	#if EV_SELECT_IS_WINSOCKET
457	SOCKET handle;	507	SOCKET handle;
458	#endif	508	#endif
459	} ANFD;	509	} ANFD;
460		510
		511	/* stores the pending event set for a given watcher */
461	typedef struct	512	typedef struct
462	{	513	{
463	W w;	514	W w;
464	int events;	515	int events; /* the pending event set for the given watcher */
465	} ANPENDING;	516	} ANPENDING;
466		517
467	#if EV_USE_INOTIFY	518	#if EV_USE_INOTIFY
468	/* hash table entry per inotify-id */	519	/* hash table entry per inotify-id */
469	typedef struct	520	typedef struct
…		…
472	} ANFS;	523	} ANFS;
473	#endif	524	#endif
474		525
475	/* Heap Entry */	526	/* Heap Entry */
476	#if EV_HEAP_CACHE_AT	527	#if EV_HEAP_CACHE_AT
		528	/* a heap element */
477	typedef struct {	529	typedef struct {
478	ev_tstamp at;	530	ev_tstamp at;
479	WT w;	531	WT w;
480	} ANHE;	532	} ANHE;
481		533
482	#define ANHE_w(he) (he).w /* access watcher, read-write */	534	#define ANHE_w(he) (he).w /* access watcher, read-write */
483	#define ANHE_at(he) (he).at /* access cached at, read-only */	535	#define ANHE_at(he) (he).at /* access cached at, read-only */
484	#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 */
485	#else	537	#else
		538	/* a heap element */
486	typedef WT ANHE;	539	typedef WT ANHE;
487		540
488	#define ANHE_w(he) (he)	541	#define ANHE_w(he) (he)
489	#define ANHE_at(he) (he)->at	542	#define ANHE_at(he) (he)->at
490	#define ANHE_at_cache(he)	543	#define ANHE_at_cache(he)
…		…
516		569
517	#endif	570	#endif
518		571
519	/*****************************************************************************/	572	/*****************************************************************************/
520		573
		574	#ifndef EV_HAVE_EV_TIME
521	ev_tstamp	575	ev_tstamp
522	ev_time (void)	576	ev_time (void)
523	{	577	{
524	#if EV_USE_REALTIME	578	#if EV_USE_REALTIME
		579	if (expect_true (have_realtime))
		580	{
525	struct timespec ts;	581	struct timespec ts;
526	clock_gettime (CLOCK_REALTIME, &ts);	582	clock_gettime (CLOCK_REALTIME, &ts);
527	return ts.tv_sec + ts.tv_nsec * 1e-9;	583	return ts.tv_sec + ts.tv_nsec * 1e-9;
528	#else	584	}
		585	#endif
		586
529	struct timeval tv;	587	struct timeval tv;
530	gettimeofday (&tv, 0);	588	gettimeofday (&tv, 0);
531	return tv.tv_sec + tv.tv_usec * 1e-6;	589	return tv.tv_sec + tv.tv_usec * 1e-6;
532	#endif
533	}	590	}
		591	#endif
534		592
535	ev_tstamp inline_size	593	inline_size ev_tstamp
536	get_clock (void)	594	get_clock (void)
537	{	595	{
538	#if EV_USE_MONOTONIC	596	#if EV_USE_MONOTONIC
539	if (expect_true (have_monotonic))	597	if (expect_true (have_monotonic))
540	{	598	{
…		…
574		632
575	tv.tv_sec = (time_t)delay;	633	tv.tv_sec = (time_t)delay;
576	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	634	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577		635
578	/* 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 */
579	/* somehting nto guaranteed by newer posix versions, but guaranteed */	637	/* somehting not guaranteed by newer posix versions, but guaranteed */
580	/* by older ones */	638	/* by older ones */
581	select (0, 0, 0, 0, &tv);	639	select (0, 0, 0, 0, &tv);
582	#endif	640	#endif
583	}	641	}
584	}	642	}
585		643
586	/*****************************************************************************/	644	/*****************************************************************************/
587		645
588	#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 */
589		647
590	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
591	array_nextsize (int elem, int cur, int cnt)	651	array_nextsize (int elem, int cur, int cnt)
592	{	652	{
593	int ncur = cur + 1;	653	int ncur = cur + 1;
594		654
595	do	655	do
…		…
636	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	696	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
637	}	697	}
638	#endif	698	#endif
639		699
640	#define array_free(stem, idx) \	700	#define array_free(stem, idx) \
641	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
642		702
643	/*****************************************************************************/	703	/*****************************************************************************/
		704
		705	/* dummy callback for pending events */
		706	static void noinline
		707	pendingcb (EV_P_ ev_prepare *w, int revents)
		708	{
		709	}
644		710
645	void noinline	711	void noinline
646	ev_feed_event (EV_P_ void *w, int revents)	712	ev_feed_event (EV_P_ void *w, int revents)
647	{	713	{
648	W w_ = (W)w;	714	W w_ = (W)w;
…		…
657	pendings [pri][w_->pending - 1].w = w_;	723	pendings [pri][w_->pending - 1].w = w_;
658	pendings [pri][w_->pending - 1].events = revents;	724	pendings [pri][w_->pending - 1].events = revents;
659	}	725	}
660	}	726	}
661		727
662	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
663	queue_events (EV_P_ W *events, int eventcnt, int type)	744	queue_events (EV_P_ W *events, int eventcnt, int type)
664	{	745	{
665	int i;	746	int i;
666		747
667	for (i = 0; i < eventcnt; ++i)	748	for (i = 0; i < eventcnt; ++i)
668	ev_feed_event (EV_A_ events [i], type);	749	ev_feed_event (EV_A_ events [i], type);
669	}	750	}
670		751
671	/*****************************************************************************/	752	/*****************************************************************************/
672		753
673	void inline_speed	754	inline_speed void
674	fd_event (EV_P_ int fd, int revents)	755	fd_event (EV_P_ int fd, int revents)
675	{	756	{
676	ANFD *anfd = anfds + fd;	757	ANFD *anfd = anfds + fd;
677	ev_io *w;	758	ev_io *w;
678		759
…		…
690	{	771	{
691	if (fd >= 0 && fd < anfdmax)	772	if (fd >= 0 && fd < anfdmax)
692	fd_event (EV_A_ fd, revents);	773	fd_event (EV_A_ fd, revents);
693	}	774	}
694		775
695	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
696	fd_reify (EV_P)	779	fd_reify (EV_P)
697	{	780	{
698	int i;	781	int i;
699		782
700	for (i = 0; i < fdchangecnt; ++i)	783	for (i = 0; i < fdchangecnt; ++i)
…		…
715	#ifdef EV_FD_TO_WIN32_HANDLE	798	#ifdef EV_FD_TO_WIN32_HANDLE
716	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	799	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717	#else	800	#else
718	anfd->handle = _get_osfhandle (fd);	801	anfd->handle = _get_osfhandle (fd);
719	#endif	802	#endif
720	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));
721	}	804	}
722	#endif	805	#endif
723		806
724	{	807	{
725	unsigned char o_events = anfd->events;	808	unsigned char o_events = anfd->events;
726	unsigned char o_reify = anfd->reify;	809	unsigned char o_reify = anfd->reify;
727		810
728	anfd->reify = 0;	811	anfd->reify = 0;
729	anfd->events = events;	812	anfd->events = events;
730		813
731	if (o_events != events || o_reify & EV_IOFDSET)	814	if (o_events != events || o_reify & EV__IOFDSET)
732	backend_modify (EV_A_ fd, o_events, events);	815	backend_modify (EV_A_ fd, o_events, events);
733	}	816	}
734	}	817	}
735		818
736	fdchangecnt = 0;	819	fdchangecnt = 0;
737	}	820	}
738		821
739	void inline_size	822	/* something about the given fd changed */
		823	inline_size void
740	fd_change (EV_P_ int fd, int flags)	824	fd_change (EV_P_ int fd, int flags)
741	{	825	{
742	unsigned char reify = anfds [fd].reify;	826	unsigned char reify = anfds [fd].reify;
743	anfds [fd].reify |= flags;	827	anfds [fd].reify |= flags;
744		828
…		…
748	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	832	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
749	fdchanges [fdchangecnt - 1] = fd;	833	fdchanges [fdchangecnt - 1] = fd;
750	}	834	}
751	}	835	}
752		836
753	void inline_speed	837	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		838	inline_speed void
754	fd_kill (EV_P_ int fd)	839	fd_kill (EV_P_ int fd)
755	{	840	{
756	ev_io *w;	841	ev_io *w;
757		842
758	while ((w = (ev_io *)anfds [fd].head))	843	while ((w = (ev_io *)anfds [fd].head))
…		…
760	ev_io_stop (EV_A_ w);	845	ev_io_stop (EV_A_ w);
761	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);
762	}	847	}
763	}	848	}
764		849
765	int inline_size	850	/* check whether the given fd is atcually valid, for error recovery */
		851	inline_size int
766	fd_valid (int fd)	852	fd_valid (int fd)
767	{	853	{
768	#ifdef _WIN32	854	#ifdef _WIN32
769	return _get_osfhandle (fd) != -1;	855	return _get_osfhandle (fd) != -1;
770	#else	856	#else
…		…
806		892
807	for (fd = 0; fd < anfdmax; ++fd)	893	for (fd = 0; fd < anfdmax; ++fd)
808	if (anfds [fd].events)	894	if (anfds [fd].events)
809	{	895	{
810	anfds [fd].events = 0;	896	anfds [fd].events = 0;
		897	anfds [fd].emask = 0;
811	fd_change (EV_A_ fd, EV_IOFDSET | 1);	898	fd_change (EV_A_ fd, EV__IOFDSET | 1);
812	}	899	}
813	}	900	}
814		901
815	/*****************************************************************************/	902	/*****************************************************************************/
816		903
…		…
832	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	919	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
833	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	920	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
834	#define UPHEAP_DONE(p,k) ((p) == (k))	921	#define UPHEAP_DONE(p,k) ((p) == (k))
835		922
836	/* away from the root */	923	/* away from the root */
837	void inline_speed	924	inline_speed void
838	downheap (ANHE *heap, int N, int k)	925	downheap (ANHE *heap, int N, int k)
839	{	926	{
840	ANHE he = heap [k];	927	ANHE he = heap [k];
841	ANHE *E = heap + N + HEAP0;	928	ANHE *E = heap + N + HEAP0;
842		929
…		…
882	#define HEAP0 1	969	#define HEAP0 1
883	#define HPARENT(k) ((k) >> 1)	970	#define HPARENT(k) ((k) >> 1)
884	#define UPHEAP_DONE(p,k) (!(p))	971	#define UPHEAP_DONE(p,k) (!(p))
885		972
886	/* away from the root */	973	/* away from the root */
887	void inline_speed	974	inline_speed void
888	downheap (ANHE *heap, int N, int k)	975	downheap (ANHE *heap, int N, int k)
889	{	976	{
890	ANHE he = heap [k];	977	ANHE he = heap [k];
891		978
892	for (;;)	979	for (;;)
…		…
912	ev_active (ANHE_w (he)) = k;	999	ev_active (ANHE_w (he)) = k;
913	}	1000	}
914	#endif	1001	#endif
915		1002
916	/* towards the root */	1003	/* towards the root */
917	void inline_speed	1004	inline_speed void
918	upheap (ANHE *heap, int k)	1005	upheap (ANHE *heap, int k)
919	{	1006	{
920	ANHE he = heap [k];	1007	ANHE he = heap [k];
921		1008
922	for (;;)	1009	for (;;)
…		…
933		1020
934	heap [k] = he;	1021	heap [k] = he;
935	ev_active (ANHE_w (he)) = k;	1022	ev_active (ANHE_w (he)) = k;
936	}	1023	}
937		1024
938	void inline_size	1025	/* move an element suitably so it is in a correct place */
		1026	inline_size void
939	adjustheap (ANHE *heap, int N, int k)	1027	adjustheap (ANHE *heap, int N, int k)
940	{	1028	{
941	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]))
942	upheap (heap, k);	1030	upheap (heap, k);
943	else	1031	else
944	downheap (heap, N, k);	1032	downheap (heap, N, k);
945	}	1033	}
946		1034
947	/* 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 */
948	void inline_size	1036	inline_size void
949	reheap (ANHE *heap, int N)	1037	reheap (ANHE *heap, int N)
950	{	1038	{
951	int i;	1039	int i;
952		1040
953	/* 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 */
…		…
956	upheap (heap, i + HEAP0);	1044	upheap (heap, i + HEAP0);
957	}	1045	}
958		1046
959	/*****************************************************************************/	1047	/*****************************************************************************/
960		1048
		1049	/* associate signal watchers to a signal signal */
961	typedef struct	1050	typedef struct
962	{	1051	{
963	WL head;	1052	WL head;
964	EV_ATOMIC_T gotsig;	1053	EV_ATOMIC_T gotsig;
965	} ANSIG;	1054	} ANSIG;
…		…
969		1058
970	static EV_ATOMIC_T gotsig;	1059	static EV_ATOMIC_T gotsig;
971		1060
972	/*****************************************************************************/	1061	/*****************************************************************************/
973		1062
974	void inline_speed	1063	/* used to prepare libev internal fd's */
		1064	/* this is not fork-safe */
		1065	inline_speed void
975	fd_intern (int fd)	1066	fd_intern (int fd)
976	{	1067	{
977	#ifdef _WIN32	1068	#ifdef _WIN32
978	unsigned long arg = 1;	1069	unsigned long arg = 1;
979	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1070	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
984	}	1075	}
985		1076
986	static void noinline	1077	static void noinline
987	evpipe_init (EV_P)	1078	evpipe_init (EV_P)
988	{	1079	{
989	if (!ev_is_active (&pipeev))	1080	if (!ev_is_active (&pipe_w))
990	{	1081	{
991	#if EV_USE_EVENTFD	1082	#if EV_USE_EVENTFD
992	if ((evfd = eventfd (0, 0)) >= 0)	1083	if ((evfd = eventfd (0, 0)) >= 0)
993	{	1084	{
994	evpipe [0] = -1;	1085	evpipe [0] = -1;
995	fd_intern (evfd);	1086	fd_intern (evfd);
996	ev_io_set (&pipeev, evfd, EV_READ);	1087	ev_io_set (&pipe_w, evfd, EV_READ);
997	}	1088	}
998	else	1089	else
999	#endif	1090	#endif
1000	{	1091	{
1001	while (pipe (evpipe))	1092	while (pipe (evpipe))
1002	syserr ("(libev) error creating signal/async pipe");	1093	ev_syserr ("(libev) error creating signal/async pipe");
1003		1094
1004	fd_intern (evpipe [0]);	1095	fd_intern (evpipe [0]);
1005	fd_intern (evpipe [1]);	1096	fd_intern (evpipe [1]);
1006	ev_io_set (&pipeev, evpipe [0], EV_READ);	1097	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1007	}	1098	}
1008		1099
1009	ev_io_start (EV_A_ &pipeev);	1100	ev_io_start (EV_A_ &pipe_w);
1010	ev_unref (EV_A); /* watcher should not keep loop alive */	1101	ev_unref (EV_A); /* watcher should not keep loop alive */
1011	}	1102	}
1012	}	1103	}
1013		1104
1014	void inline_size	1105	inline_size void
1015	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1106	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1016	{	1107	{
1017	if (!*flag)	1108	if (!*flag)
1018	{	1109	{
1019	int old_errno = errno; /* save errno because write might clobber it */	1110	int old_errno = errno; /* save errno because write might clobber it */
…		…
1032		1123
1033	errno = old_errno;	1124	errno = old_errno;
1034	}	1125	}
1035	}	1126	}
1036		1127
		1128	/* called whenever the libev signal pipe */
		1129	/* got some events (signal, async) */
1037	static void	1130	static void
1038	pipecb (EV_P_ ev_io *iow, int revents)	1131	pipecb (EV_P_ ev_io *iow, int revents)
1039	{	1132	{
1040	#if EV_USE_EVENTFD	1133	#if EV_USE_EVENTFD
1041	if (evfd >= 0)	1134	if (evfd >= 0)
…		…
1097	ev_feed_signal_event (EV_P_ int signum)	1190	ev_feed_signal_event (EV_P_ int signum)
1098	{	1191	{
1099	WL w;	1192	WL w;
1100		1193
1101	#if EV_MULTIPLICITY	1194	#if EV_MULTIPLICITY
1102	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));
1103	#endif	1196	#endif
1104		1197
1105	--signum;	1198	--signum;
1106		1199
1107	if (signum < 0 || signum >= signalmax)	1200	if (signum < 0 || signum >= signalmax)
…		…
1123		1216
1124	#ifndef WIFCONTINUED	1217	#ifndef WIFCONTINUED
1125	# define WIFCONTINUED(status) 0	1218	# define WIFCONTINUED(status) 0
1126	#endif	1219	#endif
1127		1220
1128	void inline_speed	1221	/* handle a single child status event */
		1222	inline_speed void
1129	child_reap (EV_P_ int chain, int pid, int status)	1223	child_reap (EV_P_ int chain, int pid, int status)
1130	{	1224	{
1131	ev_child *w;	1225	ev_child *w;
1132	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1226	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1133		1227
…		…
1146		1240
1147	#ifndef WCONTINUED	1241	#ifndef WCONTINUED
1148	# define WCONTINUED 0	1242	# define WCONTINUED 0
1149	#endif	1243	#endif
1150		1244
		1245	/* called on sigchld etc., calls waitpid */
1151	static void	1246	static void
1152	childcb (EV_P_ ev_signal *sw, int revents)	1247	childcb (EV_P_ ev_signal *sw, int revents)
1153	{	1248	{
1154	int pid, status;	1249	int pid, status;
1155		1250
…		…
1236	/* kqueue is borked on everything but netbsd apparently */	1331	/* kqueue is borked on everything but netbsd apparently */
1237	/* 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 */
1238	flags &= ~EVBACKEND_KQUEUE;	1333	flags &= ~EVBACKEND_KQUEUE;
1239	#endif	1334	#endif
1240	#ifdef __APPLE__	1335	#ifdef __APPLE__
1241	// flags &= ~EVBACKEND_KQUEUE; for documentation	1336	/* only select works correctly on that "unix-certified" platform */
1242	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 */
1243	#endif	1339	#endif
1244		1340
1245	return flags;	1341	return flags;
1246	}	1342	}
1247		1343
…		…
1267	ev_loop_count (EV_P)	1363	ev_loop_count (EV_P)
1268	{	1364	{
1269	return loop_count;	1365	return loop_count;
1270	}	1366	}
1271		1367
		1368	unsigned int
		1369	ev_loop_depth (EV_P)
		1370	{
		1371	return loop_depth;
		1372	}
		1373
1272	void	1374	void
1273	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1375	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1274	{	1376	{
1275	io_blocktime = interval;	1377	io_blocktime = interval;
1276	}	1378	}
…		…
1279	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1381	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1280	{	1382	{
1281	timeout_blocktime = interval;	1383	timeout_blocktime = interval;
1282	}	1384	}
1283		1385
		1386	/* initialise a loop structure, must be zero-initialised */
1284	static void noinline	1387	static void noinline
1285	loop_init (EV_P_ unsigned int flags)	1388	loop_init (EV_P_ unsigned int flags)
1286	{	1389	{
1287	if (!backend)	1390	if (!backend)
1288	{	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
1289	#if EV_USE_MONOTONIC	1402	#if EV_USE_MONOTONIC
		1403	if (!have_monotonic)
1290	{	1404	{
1291	struct timespec ts;	1405	struct timespec ts;
		1406
1292	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1407	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1293	have_monotonic = 1;	1408	have_monotonic = 1;
1294	}	1409	}
1295	#endif	1410	#endif
1296		1411
1297	ev_rt_now = ev_time ();	1412	ev_rt_now = ev_time ();
1298	mn_now = get_clock ();	1413	mn_now = get_clock ();
1299	now_floor = mn_now;	1414	now_floor = mn_now;
…		…
1336	#endif	1451	#endif
1337	#if EV_USE_SELECT	1452	#if EV_USE_SELECT
1338	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1453	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1339	#endif	1454	#endif
1340		1455
		1456	ev_prepare_init (&pending_w, pendingcb);
		1457
1341	ev_init (&pipeev, pipecb);	1458	ev_init (&pipe_w, pipecb);
1342	ev_set_priority (&pipeev, EV_MAXPRI);	1459	ev_set_priority (&pipe_w, EV_MAXPRI);
1343	}	1460	}
1344	}	1461	}
1345		1462
		1463	/* free up a loop structure */
1346	static void noinline	1464	static void noinline
1347	loop_destroy (EV_P)	1465	loop_destroy (EV_P)
1348	{	1466	{
1349	int i;	1467	int i;
1350		1468
1351	if (ev_is_active (&pipeev))	1469	if (ev_is_active (&pipe_w))
1352	{	1470	{
1353	ev_ref (EV_A); /* signal watcher */	1471	ev_ref (EV_A); /* signal watcher */
1354	ev_io_stop (EV_A_ &pipeev);	1472	ev_io_stop (EV_A_ &pipe_w);
1355		1473
1356	#if EV_USE_EVENTFD	1474	#if EV_USE_EVENTFD
1357	if (evfd >= 0)	1475	if (evfd >= 0)
1358	close (evfd);	1476	close (evfd);
1359	#endif	1477	#endif
…		…
1398	}	1516	}
1399		1517
1400	ev_free (anfds); anfdmax = 0;	1518	ev_free (anfds); anfdmax = 0;
1401		1519
1402	/* 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);
1403	array_free (fdchange, EMPTY);	1522	array_free (fdchange, EMPTY);
1404	array_free (timer, EMPTY);	1523	array_free (timer, EMPTY);
1405	#if EV_PERIODIC_ENABLE	1524	#if EV_PERIODIC_ENABLE
1406	array_free (periodic, EMPTY);	1525	array_free (periodic, EMPTY);
1407	#endif	1526	#endif
…		…
1416		1535
1417	backend = 0;	1536	backend = 0;
1418	}	1537	}
1419		1538
1420	#if EV_USE_INOTIFY	1539	#if EV_USE_INOTIFY
1421	void inline_size infy_fork (EV_P);	1540	inline_size void infy_fork (EV_P);
1422	#endif	1541	#endif
1423		1542
1424	void inline_size	1543	inline_size void
1425	loop_fork (EV_P)	1544	loop_fork (EV_P)
1426	{	1545	{
1427	#if EV_USE_PORT	1546	#if EV_USE_PORT
1428	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1547	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1429	#endif	1548	#endif
…		…
1435	#endif	1554	#endif
1436	#if EV_USE_INOTIFY	1555	#if EV_USE_INOTIFY
1437	infy_fork (EV_A);	1556	infy_fork (EV_A);
1438	#endif	1557	#endif
1439		1558
1440	if (ev_is_active (&pipeev))	1559	if (ev_is_active (&pipe_w))
1441	{	1560	{
1442	/* this "locks" the handlers against writing to the pipe */	1561	/* this "locks" the handlers against writing to the pipe */
1443	/* while we modify the fd vars */	1562	/* while we modify the fd vars */
1444	gotsig = 1;	1563	gotsig = 1;
1445	#if EV_ASYNC_ENABLE	1564	#if EV_ASYNC_ENABLE
1446	gotasync = 1;	1565	gotasync = 1;
1447	#endif	1566	#endif
1448		1567
1449	ev_ref (EV_A);	1568	ev_ref (EV_A);
1450	ev_io_stop (EV_A_ &pipeev);	1569	ev_io_stop (EV_A_ &pipe_w);
1451		1570
1452	#if EV_USE_EVENTFD	1571	#if EV_USE_EVENTFD
1453	if (evfd >= 0)	1572	if (evfd >= 0)
1454	close (evfd);	1573	close (evfd);
1455	#endif	1574	#endif
…		…
1460	close (evpipe [1]);	1579	close (evpipe [1]);
1461	}	1580	}
1462		1581
1463	evpipe_init (EV_A);	1582	evpipe_init (EV_A);
1464	/* now iterate over everything, in case we missed something */	1583	/* now iterate over everything, in case we missed something */
1465	pipecb (EV_A_ &pipeev, EV_READ);	1584	pipecb (EV_A_ &pipe_w, EV_READ);
1466	}	1585	}
1467		1586
1468	postfork = 0;	1587	postfork = 0;
1469	}	1588	}
1470		1589
…		…
1500		1619
1501	#if EV_VERIFY	1620	#if EV_VERIFY
1502	static void noinline	1621	static void noinline
1503	verify_watcher (EV_P_ W w)	1622	verify_watcher (EV_P_ W w)
1504	{	1623	{
1505	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1624	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1506		1625
1507	if (w->pending)	1626	if (w->pending)
1508	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));
1509	}	1628	}
1510		1629
1511	static void noinline	1630	static void noinline
1512	verify_heap (EV_P_ ANHE *heap, int N)	1631	verify_heap (EV_P_ ANHE *heap, int N)
1513	{	1632	{
1514	int i;	1633	int i;
1515		1634
1516	for (i = HEAP0; i < N + HEAP0; ++i)	1635	for (i = HEAP0; i < N + HEAP0; ++i)
1517	{	1636	{
1518	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));
1519	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])));
1520	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]))));
1521		1640
1522	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1641	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1523	}	1642	}
1524	}	1643	}
1525		1644
1526	static void noinline	1645	static void noinline
1527	array_verify (EV_P_ W *ws, int cnt)	1646	array_verify (EV_P_ W *ws, int cnt)
1528	{	1647	{
1529	while (cnt--)	1648	while (cnt--)
1530	{	1649	{
1531	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1650	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1532	verify_watcher (EV_A_ ws [cnt]);	1651	verify_watcher (EV_A_ ws [cnt]);
1533	}	1652	}
1534	}	1653	}
1535	#endif	1654	#endif
1536		1655
…		…
1543		1662
1544	assert (activecnt >= -1);	1663	assert (activecnt >= -1);
1545		1664
1546	assert (fdchangemax >= fdchangecnt);	1665	assert (fdchangemax >= fdchangecnt);
1547	for (i = 0; i < fdchangecnt; ++i)	1666	for (i = 0; i < fdchangecnt; ++i)
1548	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1667	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1549		1668
1550	assert (anfdmax >= 0);	1669	assert (anfdmax >= 0);
1551	for (i = 0; i < anfdmax; ++i)	1670	for (i = 0; i < anfdmax; ++i)
1552	for (w = anfds [i].head; w; w = w->next)	1671	for (w = anfds [i].head; w; w = w->next)
1553	{	1672	{
1554	verify_watcher (EV_A_ (W)w);	1673	verify_watcher (EV_A_ (W)w);
1555	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1674	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1556	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));
1557	}	1676	}
1558		1677
1559	assert (timermax >= timercnt);	1678	assert (timermax >= timercnt);
1560	verify_heap (EV_A_ timers, timercnt);	1679	verify_heap (EV_A_ timers, timercnt);
1561		1680
…		…
1655	{	1774	{
1656	#if EV_MULTIPLICITY	1775	#if EV_MULTIPLICITY
1657	struct ev_loop *loop = ev_default_loop_ptr;	1776	struct ev_loop *loop = ev_default_loop_ptr;
1658	#endif	1777	#endif
1659		1778
1660	if (backend)
1661	postfork = 1; /* must be in line with ev_loop_fork */	1779	postfork = 1; /* must be in line with ev_loop_fork */
1662	}	1780	}
1663		1781
1664	/*****************************************************************************/	1782	/*****************************************************************************/
1665		1783
1666	void	1784	void
1667	ev_invoke (EV_P_ void *w, int revents)	1785	ev_invoke (EV_P_ void *w, int revents)
1668	{	1786	{
1669	EV_CB_INVOKE ((W)w, revents);	1787	EV_CB_INVOKE ((W)w, revents);
1670	}	1788	}
1671		1789
1672	void inline_speed	1790	inline_speed void
1673	call_pending (EV_P)	1791	call_pending (EV_P)
1674	{	1792	{
1675	int pri;	1793	int pri;
1676		1794
1677	for (pri = NUMPRI; pri--; )	1795	for (pri = NUMPRI; pri--; )
1678	while (pendingcnt [pri])	1796	while (pendingcnt [pri])
1679	{	1797	{
1680	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1798	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1681		1799
1682	if (expect_true (p->w))
1683	{
1684	/*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 */
1685		1802
1686	p->w->pending = 0;	1803	p->w->pending = 0;
1687	EV_CB_INVOKE (p->w, p->events);	1804	EV_CB_INVOKE (p->w, p->events);
1688	EV_FREQUENT_CHECK;	1805	EV_FREQUENT_CHECK;
1689	}
1690	}	1806	}
1691	}	1807	}
1692		1808
1693	#if EV_IDLE_ENABLE	1809	#if EV_IDLE_ENABLE
1694	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
1695	idle_reify (EV_P)	1813	idle_reify (EV_P)
1696	{	1814	{
1697	if (expect_false (idleall))	1815	if (expect_false (idleall))
1698	{	1816	{
1699	int pri;	1817	int pri;
…		…
1711	}	1829	}
1712	}	1830	}
1713	}	1831	}
1714	#endif	1832	#endif
1715		1833
1716	void inline_size	1834	/* make timers pending */
		1835	inline_size void
1717	timers_reify (EV_P)	1836	timers_reify (EV_P)
1718	{	1837	{
1719	EV_FREQUENT_CHECK;	1838	EV_FREQUENT_CHECK;
1720		1839
1721	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1840	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1722	{	1841	{
1723	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1842	do
1724
1725	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1726
1727	/* first reschedule or stop timer */
1728	if (w->repeat)
1729	{	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	{
1730	ev_at (w) += w->repeat;	1851	ev_at (w) += w->repeat;
1731	if (ev_at (w) < mn_now)	1852	if (ev_at (w) < mn_now)
1732	ev_at (w) = mn_now;	1853	ev_at (w) = mn_now;
1733		1854
1734	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.));
1735		1856
1736	ANHE_at_cache (timers [HEAP0]);	1857	ANHE_at_cache (timers [HEAP0]);
1737	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);
1738	}	1865	}
1739	else	1866	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1740	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1741		1867
1742	EV_FREQUENT_CHECK;
1743	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1868	feed_reverse_done (EV_A_ EV_TIMEOUT);
1744	}	1869	}
1745	}	1870	}
1746		1871
1747	#if EV_PERIODIC_ENABLE	1872	#if EV_PERIODIC_ENABLE
1748	void inline_size	1873	/* make periodics pending */
		1874	inline_size void
1749	periodics_reify (EV_P)	1875	periodics_reify (EV_P)
1750	{	1876	{
1751	EV_FREQUENT_CHECK;	1877	EV_FREQUENT_CHECK;
1752		1878
1753	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1879	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1754	{	1880	{
1755	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1881	int feed_count = 0;
1756		1882
1757	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1883	do
1758
1759	/* first reschedule or stop timer */
1760	if (w->reschedule_cb)
1761	{	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	{
1762	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1892	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1763		1893
1764	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));
1765		1895
1766	ANHE_at_cache (periodics [HEAP0]);	1896	ANHE_at_cache (periodics [HEAP0]);
1767	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);
1768	}	1923	}
1769	else if (w->interval)	1924	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1770	{
1771	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1772	/* if next trigger time is not sufficiently in the future, put it there */
1773	/* this might happen because of floating point inexactness */
1774	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1775	{
1776	ev_at (w) += w->interval;
1777		1925
1778	/* if interval is unreasonably low we might still have a time in the past */
1779	/* so correct this. this will make the periodic very inexact, but the user */
1780	/* has effectively asked to get triggered more often than possible */
1781	if (ev_at (w) < ev_rt_now)
1782	ev_at (w) = ev_rt_now;
1783	}
1784
1785	ANHE_at_cache (periodics [HEAP0]);
1786	downheap (periodics, periodiccnt, HEAP0);
1787	}
1788	else
1789	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1790
1791	EV_FREQUENT_CHECK;
1792	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1926	feed_reverse_done (EV_A_ EV_PERIODIC);
1793	}	1927	}
1794	}	1928	}
1795		1929
		1930	/* simply recalculate all periodics */
		1931	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1796	static void noinline	1932	static void noinline
1797	periodics_reschedule (EV_P)	1933	periodics_reschedule (EV_P)
1798	{	1934	{
1799	int i;	1935	int i;
1800		1936
…		…
1813		1949
1814	reheap (periodics, periodiccnt);	1950	reheap (periodics, periodiccnt);
1815	}	1951	}
1816	#endif	1952	#endif
1817		1953
1818	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
1819	time_update (EV_P_ ev_tstamp max_block)	1971	time_update (EV_P_ ev_tstamp max_block)
1820	{	1972	{
1821	int i;
1822
1823	#if EV_USE_MONOTONIC	1973	#if EV_USE_MONOTONIC
1824	if (expect_true (have_monotonic))	1974	if (expect_true (have_monotonic))
1825	{	1975	{
		1976	int i;
1826	ev_tstamp odiff = rtmn_diff;	1977	ev_tstamp odiff = rtmn_diff;
1827		1978
1828	mn_now = get_clock ();	1979	mn_now = get_clock ();
1829		1980
1830	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1981	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1856	ev_rt_now = ev_time ();	2007	ev_rt_now = ev_time ();
1857	mn_now = get_clock ();	2008	mn_now = get_clock ();
1858	now_floor = mn_now;	2009	now_floor = mn_now;
1859	}	2010	}
1860		2011
		2012	/* no timer adjustment, as the monotonic clock doesn't jump */
		2013	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1861	# if EV_PERIODIC_ENABLE	2014	# if EV_PERIODIC_ENABLE
1862	periodics_reschedule (EV_A);	2015	periodics_reschedule (EV_A);
1863	# endif	2016	# endif
1864	/* no timer adjustment, as the monotonic clock doesn't jump */
1865	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1866	}	2017	}
1867	else	2018	else
1868	#endif	2019	#endif
1869	{	2020	{
1870	ev_rt_now = ev_time ();	2021	ev_rt_now = ev_time ();
1871		2022
1872	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))
1873	{	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);
1874	#if EV_PERIODIC_ENABLE	2027	#if EV_PERIODIC_ENABLE
1875	periodics_reschedule (EV_A);	2028	periodics_reschedule (EV_A);
1876	#endif	2029	#endif
1877	/* adjust timers. this is easy, as the offset is the same for all of them */
1878	for (i = 0; i < timercnt; ++i)
1879	{
1880	ANHE *he = timers + i + HEAP0;
1881	ANHE_w (*he)->at += ev_rt_now - mn_now;
1882	ANHE_at_cache (*he);
1883	}
1884	}	2030	}
1885		2031
1886	mn_now = ev_rt_now;	2032	mn_now = ev_rt_now;
1887	}	2033	}
1888	}	2034	}
1889		2035
1890	void	2036	void
1891	ev_ref (EV_P)
1892	{
1893	++activecnt;
1894	}
1895
1896	void
1897	ev_unref (EV_P)
1898	{
1899	--activecnt;
1900	}
1901
1902	void
1903	ev_now_update (EV_P)
1904	{
1905	time_update (EV_A_ 1e100);
1906	}
1907
1908	static int loop_done;
1909
1910	void
1911	ev_loop (EV_P_ int flags)	2037	ev_loop (EV_P_ int flags)
1912	{	2038	{
		2039	++loop_depth;
		2040
1913	loop_done = EVUNLOOP_CANCEL;	2041	loop_done = EVUNLOOP_CANCEL;
1914		2042
1915	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 */
1916		2044
1917	do	2045	do
…		…
1944	{	2072	{
1945	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2073	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1946	call_pending (EV_A);	2074	call_pending (EV_A);
1947	}	2075	}
1948		2076
1949	if (expect_false (!activecnt))
1950	break;
1951
1952	/* we might have forked, so reify kernel state if necessary */	2077	/* we might have forked, so reify kernel state if necessary */
1953	if (expect_false (postfork))	2078	if (expect_false (postfork))
1954	loop_fork (EV_A);	2079	loop_fork (EV_A);
1955		2080
1956	/* update fd-related kernel structures */	2081	/* update fd-related kernel structures */
…		…
1961	ev_tstamp waittime = 0.;	2086	ev_tstamp waittime = 0.;
1962	ev_tstamp sleeptime = 0.;	2087	ev_tstamp sleeptime = 0.;
1963		2088
1964	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2089	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1965	{	2090	{
		2091	/* remember old timestamp for io_blocktime calculation */
		2092	ev_tstamp prev_mn_now = mn_now;
		2093
1966	/* update time to cancel out callback processing overhead */	2094	/* update time to cancel out callback processing overhead */
1967	time_update (EV_A_ 1e100);	2095	time_update (EV_A_ 1e100);
1968		2096
1969	waittime = MAX_BLOCKTIME;	2097	waittime = MAX_BLOCKTIME;
1970		2098
…		…
1980	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;
1981	if (waittime > to) waittime = to;	2109	if (waittime > to) waittime = to;
1982	}	2110	}
1983	#endif	2111	#endif
1984		2112
		2113	/* don't let timeouts decrease the waittime below timeout_blocktime */
1985	if (expect_false (waittime < timeout_blocktime))	2114	if (expect_false (waittime < timeout_blocktime))
1986	waittime = timeout_blocktime;	2115	waittime = timeout_blocktime;
1987		2116
1988	sleeptime = waittime - backend_fudge;	2117	/* extra check because io_blocktime is commonly 0 */
1989
1990	if (expect_true (sleeptime > io_blocktime))	2118	if (expect_false (io_blocktime))
1991	sleeptime = io_blocktime;
1992
1993	if (sleeptime)
1994	{	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	{
1995	ev_sleep (sleeptime);	2127	ev_sleep (sleeptime);
1996	waittime -= sleeptime;	2128	waittime -= sleeptime;
		2129	}
1997	}	2130	}
1998	}	2131	}
1999		2132
2000	++loop_count;	2133	++loop_count;
2001	backend_poll (EV_A_ waittime);	2134	backend_poll (EV_A_ waittime);
…		…
2027	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2160	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2028	));	2161	));
2029		2162
2030	if (loop_done == EVUNLOOP_ONE)	2163	if (loop_done == EVUNLOOP_ONE)
2031	loop_done = EVUNLOOP_CANCEL;	2164	loop_done = EVUNLOOP_CANCEL;
		2165
		2166	--loop_depth;
2032	}	2167	}
2033		2168
2034	void	2169	void
2035	ev_unloop (EV_P_ int how)	2170	ev_unloop (EV_P_ int how)
2036	{	2171	{
2037	loop_done = how;	2172	loop_done = how;
2038	}	2173	}
2039		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
2040	/*****************************************************************************/	2212	/*****************************************************************************/
		2213	/* singly-linked list management, used when the expected list length is short */
2041		2214
2042	void inline_size	2215	inline_size void
2043	wlist_add (WL *head, WL elem)	2216	wlist_add (WL *head, WL elem)
2044	{	2217	{
2045	elem->next = *head;	2218	elem->next = *head;
2046	*head = elem;	2219	*head = elem;
2047	}	2220	}
2048		2221
2049	void inline_size	2222	inline_size void
2050	wlist_del (WL *head, WL elem)	2223	wlist_del (WL *head, WL elem)
2051	{	2224	{
2052	while (*head)	2225	while (*head)
2053	{	2226	{
2054	if (*head == elem)	2227	if (*head == elem)
…		…
2059		2232
2060	head = &(*head)->next;	2233	head = &(*head)->next;
2061	}	2234	}
2062	}	2235	}
2063		2236
2064	void inline_speed	2237	/* internal, faster, version of ev_clear_pending */
		2238	inline_speed void
2065	clear_pending (EV_P_ W w)	2239	clear_pending (EV_P_ W w)
2066	{	2240	{
2067	if (w->pending)	2241	if (w->pending)
2068	{	2242	{
2069	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2243	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2070	w->pending = 0;	2244	w->pending = 0;
2071	}	2245	}
2072	}	2246	}
2073		2247
2074	int	2248	int
…		…
2078	int pending = w_->pending;	2252	int pending = w_->pending;
2079		2253
2080	if (expect_true (pending))	2254	if (expect_true (pending))
2081	{	2255	{
2082	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2256	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2257	p->w = (W)&pending_w;
2083	w_->pending = 0;	2258	w_->pending = 0;
2084	p->w = 0;
2085	return p->events;	2259	return p->events;
2086	}	2260	}
2087	else	2261	else
2088	return 0;	2262	return 0;
2089	}	2263	}
2090		2264
2091	void inline_size	2265	inline_size void
2092	pri_adjust (EV_P_ W w)	2266	pri_adjust (EV_P_ W w)
2093	{	2267	{
2094	int pri = w->priority;	2268	int pri = ev_priority (w);
2095	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2269	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2096	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2270	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2097	w->priority = pri;	2271	ev_set_priority (w, pri);
2098	}	2272	}
2099		2273
2100	void inline_speed	2274	inline_speed void
2101	ev_start (EV_P_ W w, int active)	2275	ev_start (EV_P_ W w, int active)
2102	{	2276	{
2103	pri_adjust (EV_A_ w);	2277	pri_adjust (EV_A_ w);
2104	w->active = active;	2278	w->active = active;
2105	ev_ref (EV_A);	2279	ev_ref (EV_A);
2106	}	2280	}
2107		2281
2108	void inline_size	2282	inline_size void
2109	ev_stop (EV_P_ W w)	2283	ev_stop (EV_P_ W w)
2110	{	2284	{
2111	ev_unref (EV_A);	2285	ev_unref (EV_A);
2112	w->active = 0;	2286	w->active = 0;
2113	}	2287	}
…		…
2120	int fd = w->fd;	2294	int fd = w->fd;
2121		2295
2122	if (expect_false (ev_is_active (w)))	2296	if (expect_false (ev_is_active (w)))
2123	return;	2297	return;
2124		2298
2125	assert (("ev_io_start called with negative fd", fd >= 0));	2299	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2126	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))));
2127		2301
2128	EV_FREQUENT_CHECK;	2302	EV_FREQUENT_CHECK;
2129		2303
2130	ev_start (EV_A_ (W)w, 1);	2304	ev_start (EV_A_ (W)w, 1);
2131	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2305	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2132	wlist_add (&anfds[fd].head, (WL)w);	2306	wlist_add (&anfds[fd].head, (WL)w);
2133		2307
2134	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2308	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2135	w->events &= ~EV_IOFDSET;	2309	w->events &= ~EV__IOFDSET;
2136		2310
2137	EV_FREQUENT_CHECK;	2311	EV_FREQUENT_CHECK;
2138	}	2312	}
2139		2313
2140	void noinline	2314	void noinline
…		…
2142	{	2316	{
2143	clear_pending (EV_A_ (W)w);	2317	clear_pending (EV_A_ (W)w);
2144	if (expect_false (!ev_is_active (w)))	2318	if (expect_false (!ev_is_active (w)))
2145	return;	2319	return;
2146		2320
2147	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));
2148		2322
2149	EV_FREQUENT_CHECK;	2323	EV_FREQUENT_CHECK;
2150		2324
2151	wlist_del (&anfds[w->fd].head, (WL)w);	2325	wlist_del (&anfds[w->fd].head, (WL)w);
2152	ev_stop (EV_A_ (W)w);	2326	ev_stop (EV_A_ (W)w);
…		…
2162	if (expect_false (ev_is_active (w)))	2336	if (expect_false (ev_is_active (w)))
2163	return;	2337	return;
2164		2338
2165	ev_at (w) += mn_now;	2339	ev_at (w) += mn_now;
2166		2340
2167	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.));
2168		2342
2169	EV_FREQUENT_CHECK;	2343	EV_FREQUENT_CHECK;
2170		2344
2171	++timercnt;	2345	++timercnt;
2172	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2346	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2175	ANHE_at_cache (timers [ev_active (w)]);	2349	ANHE_at_cache (timers [ev_active (w)]);
2176	upheap (timers, ev_active (w));	2350	upheap (timers, ev_active (w));
2177		2351
2178	EV_FREQUENT_CHECK;	2352	EV_FREQUENT_CHECK;
2179		2353
2180	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2354	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2181	}	2355	}
2182		2356
2183	void noinline	2357	void noinline
2184	ev_timer_stop (EV_P_ ev_timer *w)	2358	ev_timer_stop (EV_P_ ev_timer *w)
2185	{	2359	{
…		…
2190	EV_FREQUENT_CHECK;	2364	EV_FREQUENT_CHECK;
2191		2365
2192	{	2366	{
2193	int active = ev_active (w);	2367	int active = ev_active (w);
2194		2368
2195	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2369	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2196		2370
2197	--timercnt;	2371	--timercnt;
2198		2372
2199	if (expect_true (active < timercnt + HEAP0))	2373	if (expect_true (active < timercnt + HEAP0))
2200	{	2374	{
…		…
2244		2418
2245	if (w->reschedule_cb)	2419	if (w->reschedule_cb)
2246	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2420	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2247	else if (w->interval)	2421	else if (w->interval)
2248	{	2422	{
2249	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.));
2250	/* 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 */
2251	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;
2252	}	2426	}
2253	else	2427	else
2254	ev_at (w) = w->offset;	2428	ev_at (w) = w->offset;
…		…
2262	ANHE_at_cache (periodics [ev_active (w)]);	2436	ANHE_at_cache (periodics [ev_active (w)]);
2263	upheap (periodics, ev_active (w));	2437	upheap (periodics, ev_active (w));
2264		2438
2265	EV_FREQUENT_CHECK;	2439	EV_FREQUENT_CHECK;
2266		2440
2267	/*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));*/
2268	}	2442	}
2269		2443
2270	void noinline	2444	void noinline
2271	ev_periodic_stop (EV_P_ ev_periodic *w)	2445	ev_periodic_stop (EV_P_ ev_periodic *w)
2272	{	2446	{
…		…
2277	EV_FREQUENT_CHECK;	2451	EV_FREQUENT_CHECK;
2278		2452
2279	{	2453	{
2280	int active = ev_active (w);	2454	int active = ev_active (w);
2281		2455
2282	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2456	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2283		2457
2284	--periodiccnt;	2458	--periodiccnt;
2285		2459
2286	if (expect_true (active < periodiccnt + HEAP0))	2460	if (expect_true (active < periodiccnt + HEAP0))
2287	{	2461	{
…		…
2310		2484
2311	void noinline	2485	void noinline
2312	ev_signal_start (EV_P_ ev_signal *w)	2486	ev_signal_start (EV_P_ ev_signal *w)
2313	{	2487	{
2314	#if EV_MULTIPLICITY	2488	#if EV_MULTIPLICITY
2315	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));
2316	#endif	2490	#endif
2317	if (expect_false (ev_is_active (w)))	2491	if (expect_false (ev_is_active (w)))
2318	return;	2492	return;
2319		2493
2320	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));
2321		2495
2322	evpipe_init (EV_A);	2496	evpipe_init (EV_A);
2323		2497
2324	EV_FREQUENT_CHECK;	2498	EV_FREQUENT_CHECK;
2325		2499
…		…
2376		2550
2377	void	2551	void
2378	ev_child_start (EV_P_ ev_child *w)	2552	ev_child_start (EV_P_ ev_child *w)
2379	{	2553	{
2380	#if EV_MULTIPLICITY	2554	#if EV_MULTIPLICITY
2381	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));
2382	#endif	2556	#endif
2383	if (expect_false (ev_is_active (w)))	2557	if (expect_false (ev_is_active (w)))
2384	return;	2558	return;
2385		2559
2386	EV_FREQUENT_CHECK;	2560	EV_FREQUENT_CHECK;
…		…
2411	# ifdef _WIN32	2585	# ifdef _WIN32
2412	# undef lstat	2586	# undef lstat
2413	# define lstat(a,b) _stati64 (a,b)	2587	# define lstat(a,b) _stati64 (a,b)
2414	# endif	2588	# endif
2415		2589
2416	#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 */
2417	#define MIN_STAT_INTERVAL 0.1074891	2592	#define MIN_STAT_INTERVAL 0.1074891
2418		2593
2419	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);
2420		2595
2421	#if EV_USE_INOTIFY	2596	#if EV_USE_INOTIFY
2422	# define EV_INOTIFY_BUFSIZE 8192	2597	# define EV_INOTIFY_BUFSIZE 8192
…		…
2426	{	2601	{
2427	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);
2428		2603
2429	if (w->wd < 0)	2604	if (w->wd < 0)
2430	{	2605	{
		2606	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2431	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 */
2432		2608
2433	/* monitor some parent directory for speedup hints */	2609	/* monitor some parent directory for speedup hints */
2434	/* note that exceeding the hardcoded limit is not a correctness issue, */	2610	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2435	/* but an efficiency issue only */	2611	/* but an efficiency issue only */
2436	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2612	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2437	{	2613	{
2438	char path [4096];	2614	char path [4096];
2439	strcpy (path, w->path);	2615	strcpy (path, w->path);
…		…
2443	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2619	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2444	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2620	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2445		2621
2446	char *pend = strrchr (path, '/');	2622	char *pend = strrchr (path, '/');
2447		2623
2448	if (!pend)	2624	if (!pend || pend == path)
2449	break; /* whoops, no '/', complain to your admin */	2625	break;
2450		2626
2451	*pend = 0;	2627	*pend = 0;
2452	w->wd = inotify_add_watch (fs_fd, path, mask);	2628	w->wd = inotify_add_watch (fs_fd, path, mask);
2453	}	2629	}
2454	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2630	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2455	}	2631	}
2456	}	2632	}
2457	else
2458	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2459		2633
2460	if (w->wd >= 0)	2634	if (w->wd >= 0)
		2635	{
2461	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	}
2462	}	2655	}
2463		2656
2464	static void noinline	2657	static void noinline
2465	infy_del (EV_P_ ev_stat *w)	2658	infy_del (EV_P_ ev_stat *w)
2466	{	2659	{
…		…
2496		2689
2497	if (w->wd == wd || wd == -1)	2690	if (w->wd == wd || wd == -1)
2498	{	2691	{
2499	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2692	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2500	{	2693	{
		2694	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2501	w->wd = -1;	2695	w->wd = -1;
2502	infy_add (EV_A_ w); /* re-add, no matter what */	2696	infy_add (EV_A_ w); /* re-add, no matter what */
2503	}	2697	}
2504		2698
2505	stat_timer_cb (EV_A_ &w->timer, 0);	2699	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2518		2712
2519	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)
2520	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2714	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2521	}	2715	}
2522		2716
2523	void inline_size	2717	inline_size void
2524	infy_init (EV_P)	2718	check_2625 (EV_P)
2525	{	2719	{
2526	if (fs_fd != -2)
2527	return;
2528
2529	/* kernels < 2.6.25 are borked	2720	/* kernels < 2.6.25 are borked
2530	* 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
2531	*/	2722	*/
2532	{
2533	struct utsname buf;	2723	struct utsname buf;
2534	int major, minor, micro;	2724	int major, minor, micro;
2535		2725
2536	fs_fd = -1;
2537
2538	if (uname (&buf))	2726	if (uname (&buf))
2539	return;	2727	return;
2540		2728
2541	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2729	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2542	return;	2730	return;
2543		2731
2544	if (major < 2	2732	if (major < 2
2545	|| (major == 2 && minor < 6)	2733	|| (major == 2 && minor < 6)
2546	|| (major == 2 && minor == 6 && micro < 25))	2734	|| (major == 2 && minor == 6 && micro < 25))
2547	return;	2735	return;
2548	}	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);
2549		2749
2550	fs_fd = inotify_init ();	2750	fs_fd = inotify_init ();
2551		2751
2552	if (fs_fd >= 0)	2752	if (fs_fd >= 0)
2553	{	2753	{
…		…
2555	ev_set_priority (&fs_w, EV_MAXPRI);	2755	ev_set_priority (&fs_w, EV_MAXPRI);
2556	ev_io_start (EV_A_ &fs_w);	2756	ev_io_start (EV_A_ &fs_w);
2557	}	2757	}
2558	}	2758	}
2559		2759
2560	void inline_size	2760	inline_size void
2561	infy_fork (EV_P)	2761	infy_fork (EV_P)
2562	{	2762	{
2563	int slot;	2763	int slot;
2564		2764
2565	if (fs_fd < 0)	2765	if (fs_fd < 0)
…		…
2581	w->wd = -1;	2781	w->wd = -1;
2582		2782
2583	if (fs_fd >= 0)	2783	if (fs_fd >= 0)
2584	infy_add (EV_A_ w); /* re-add, no matter what */	2784	infy_add (EV_A_ w); /* re-add, no matter what */
2585	else	2785	else
2586	ev_timer_start (EV_A_ &w->timer);	2786	ev_timer_again (EV_A_ &w->timer);
2587	}	2787	}
2588	}	2788	}
2589	}	2789	}
2590		2790
2591	#endif	2791	#endif
…		…
2646	ev_stat_start (EV_P_ ev_stat *w)	2846	ev_stat_start (EV_P_ ev_stat *w)
2647	{	2847	{
2648	if (expect_false (ev_is_active (w)))	2848	if (expect_false (ev_is_active (w)))
2649	return;	2849	return;
2650		2850
2651	/* since we use memcmp, we need to clear any padding data etc. */
2652	memset (&w->prev, 0, sizeof (ev_statdata));
2653	memset (&w->attr, 0, sizeof (ev_statdata));
2654
2655	ev_stat_stat (EV_A_ w);	2851	ev_stat_stat (EV_A_ w);
2656		2852
		2853	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2657	if (w->interval < MIN_STAT_INTERVAL)	2854	w->interval = MIN_STAT_INTERVAL;
2658	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2659		2855
2660	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);
2661	ev_set_priority (&w->timer, ev_priority (w));	2857	ev_set_priority (&w->timer, ev_priority (w));
2662		2858
2663	#if EV_USE_INOTIFY	2859	#if EV_USE_INOTIFY
2664	infy_init (EV_A);	2860	infy_init (EV_A);
2665		2861
2666	if (fs_fd >= 0)	2862	if (fs_fd >= 0)
2667	infy_add (EV_A_ w);	2863	infy_add (EV_A_ w);
2668	else	2864	else
2669	#endif	2865	#endif
2670	ev_timer_start (EV_A_ &w->timer);	2866	ev_timer_again (EV_A_ &w->timer);
2671		2867
2672	ev_start (EV_A_ (W)w, 1);	2868	ev_start (EV_A_ (W)w, 1);
2673		2869
2674	EV_FREQUENT_CHECK;	2870	EV_FREQUENT_CHECK;
2675	}	2871	}
…		…
2850	static void	3046	static void
2851	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3047	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2852	{	3048	{
2853	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));
2854		3050
		3051	ev_embed_stop (EV_A_ w);
		3052
2855	{	3053	{
2856	struct ev_loop *loop = w->other;	3054	struct ev_loop *loop = w->other;
2857		3055
2858	ev_loop_fork (EV_A);	3056	ev_loop_fork (EV_A);
		3057	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2859	}	3058	}
		3059
		3060	ev_embed_start (EV_A_ w);
2860	}	3061	}
2861		3062
2862	#if 0	3063	#if 0
2863	static void	3064	static void
2864	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3065	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2873	if (expect_false (ev_is_active (w)))	3074	if (expect_false (ev_is_active (w)))
2874	return;	3075	return;
2875		3076
2876	{	3077	{
2877	struct ev_loop *loop = w->other;	3078	struct ev_loop *loop = w->other;
2878	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 ()));
2879	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);
2880	}	3081	}
2881		3082
2882	EV_FREQUENT_CHECK;	3083	EV_FREQUENT_CHECK;
2883		3084
…		…
3066	ev_timer_set (&once->to, timeout, 0.);	3267	ev_timer_set (&once->to, timeout, 0.);
3067	ev_timer_start (EV_A_ &once->to);	3268	ev_timer_start (EV_A_ &once->to);
3068	}	3269	}
3069	}	3270	}
3070		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
3071	#if EV_MULTIPLICITY	3380	#if EV_MULTIPLICITY
3072	#include "ev_wrap.h"	3381	#include "ev_wrap.h"
3073	#endif	3382	#endif
3074		3383
3075	#ifdef __cplusplus	3384	#ifdef __cplusplus

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