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Comparing libev/ev.c (file contents):
Revision 1.264 by root, Mon Oct 13 23:20:12 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 */
		500	unsigned char reify; /* flag set when this ANFD needs reification */
		501	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
453	unsigned char reify;	502	unsigned char unused;
		503	#if EV_USE_EPOLL
		504	unsigned int egen; /* generation counter to counter epoll bugs */
		505	#endif
454	#if EV_SELECT_IS_WINSOCKET	506	#if EV_SELECT_IS_WINSOCKET
455	SOCKET handle;	507	SOCKET handle;
456	#endif	508	#endif
457	} ANFD;	509	} ANFD;
458		510
		511	/* stores the pending event set for a given watcher */
459	typedef struct	512	typedef struct
460	{	513	{
461	W w;	514	W w;
462	int events;	515	int events; /* the pending event set for the given watcher */
463	} ANPENDING;	516	} ANPENDING;
464		517
465	#if EV_USE_INOTIFY	518	#if EV_USE_INOTIFY
466	/* hash table entry per inotify-id */	519	/* hash table entry per inotify-id */
467	typedef struct	520	typedef struct
…		…
470	} ANFS;	523	} ANFS;
471	#endif	524	#endif
472		525
473	/* Heap Entry */	526	/* Heap Entry */
474	#if EV_HEAP_CACHE_AT	527	#if EV_HEAP_CACHE_AT
		528	/* a heap element */
475	typedef struct {	529	typedef struct {
476	ev_tstamp at;	530	ev_tstamp at;
477	WT w;	531	WT w;
478	} ANHE;	532	} ANHE;
479		533
480	#define ANHE_w(he) (he).w /* access watcher, read-write */	534	#define ANHE_w(he) (he).w /* access watcher, read-write */
481	#define ANHE_at(he) (he).at /* access cached at, read-only */	535	#define ANHE_at(he) (he).at /* access cached at, read-only */
482	#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 */
483	#else	537	#else
		538	/* a heap element */
484	typedef WT ANHE;	539	typedef WT ANHE;
485		540
486	#define ANHE_w(he) (he)	541	#define ANHE_w(he) (he)
487	#define ANHE_at(he) (he)->at	542	#define ANHE_at(he) (he)->at
488	#define ANHE_at_cache(he)	543	#define ANHE_at_cache(he)
…		…
514		569
515	#endif	570	#endif
516		571
517	/*****************************************************************************/	572	/*****************************************************************************/
518		573
		574	#ifndef EV_HAVE_EV_TIME
519	ev_tstamp	575	ev_tstamp
520	ev_time (void)	576	ev_time (void)
521	{	577	{
522	#if EV_USE_REALTIME	578	#if EV_USE_REALTIME
		579	if (expect_true (have_realtime))
		580	{
523	struct timespec ts;	581	struct timespec ts;
524	clock_gettime (CLOCK_REALTIME, &ts);	582	clock_gettime (CLOCK_REALTIME, &ts);
525	return ts.tv_sec + ts.tv_nsec * 1e-9;	583	return ts.tv_sec + ts.tv_nsec * 1e-9;
526	#else	584	}
		585	#endif
		586
527	struct timeval tv;	587	struct timeval tv;
528	gettimeofday (&tv, 0);	588	gettimeofday (&tv, 0);
529	return tv.tv_sec + tv.tv_usec * 1e-6;	589	return tv.tv_sec + tv.tv_usec * 1e-6;
530	#endif
531	}	590	}
		591	#endif
532		592
533	ev_tstamp inline_size	593	inline_size ev_tstamp
534	get_clock (void)	594	get_clock (void)
535	{	595	{
536	#if EV_USE_MONOTONIC	596	#if EV_USE_MONOTONIC
537	if (expect_true (have_monotonic))	597	if (expect_true (have_monotonic))
538	{	598	{
…		…
572		632
573	tv.tv_sec = (time_t)delay;	633	tv.tv_sec = (time_t)delay;
574	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	634	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
575		635
576	/* 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 */
577	/* somehting nto guaranteed by newer posix versions, but guaranteed */	637	/* somehting not guaranteed by newer posix versions, but guaranteed */
578	/* by older ones */	638	/* by older ones */
579	select (0, 0, 0, 0, &tv);	639	select (0, 0, 0, 0, &tv);
580	#endif	640	#endif
581	}	641	}
582	}	642	}
583		643
584	/*****************************************************************************/	644	/*****************************************************************************/
585		645
586	#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 */
587		647
588	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
589	array_nextsize (int elem, int cur, int cnt)	651	array_nextsize (int elem, int cur, int cnt)
590	{	652	{
591	int ncur = cur + 1;	653	int ncur = cur + 1;
592		654
593	do	655	do
…		…
610	array_realloc (int elem, void *base, int *cur, int cnt)	672	array_realloc (int elem, void *base, int *cur, int cnt)
611	{	673	{
612	*cur = array_nextsize (elem, *cur, cnt);	674	*cur = array_nextsize (elem, *cur, cnt);
613	return ev_realloc (base, elem * *cur);	675	return ev_realloc (base, elem * *cur);
614	}	676	}
		677
		678	#define array_init_zero(base,count) \
		679	memset ((void *)(base), 0, sizeof (*(base)) * (count))
615		680
616	#define array_needsize(type,base,cur,cnt,init) \	681	#define array_needsize(type,base,cur,cnt,init) \
617	if (expect_false ((cnt) > (cur))) \	682	if (expect_false ((cnt) > (cur))) \
618	{ \	683	{ \
619	int ocur_ = (cur); \	684	int ocur_ = (cur); \
…		…
631	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	696	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
632	}	697	}
633	#endif	698	#endif
634		699
635	#define array_free(stem, idx) \	700	#define array_free(stem, idx) \
636	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
637		702
638	/*****************************************************************************/	703	/*****************************************************************************/
		704
		705	/* dummy callback for pending events */
		706	static void noinline
		707	pendingcb (EV_P_ ev_prepare *w, int revents)
		708	{
		709	}
639		710
640	void noinline	711	void noinline
641	ev_feed_event (EV_P_ void *w, int revents)	712	ev_feed_event (EV_P_ void *w, int revents)
642	{	713	{
643	W w_ = (W)w;	714	W w_ = (W)w;
…		…
652	pendings [pri][w_->pending - 1].w = w_;	723	pendings [pri][w_->pending - 1].w = w_;
653	pendings [pri][w_->pending - 1].events = revents;	724	pendings [pri][w_->pending - 1].events = revents;
654	}	725	}
655	}	726	}
656		727
657	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
658	queue_events (EV_P_ W *events, int eventcnt, int type)	744	queue_events (EV_P_ W *events, int eventcnt, int type)
659	{	745	{
660	int i;	746	int i;
661		747
662	for (i = 0; i < eventcnt; ++i)	748	for (i = 0; i < eventcnt; ++i)
663	ev_feed_event (EV_A_ events [i], type);	749	ev_feed_event (EV_A_ events [i], type);
664	}	750	}
665		751
666	/*****************************************************************************/	752	/*****************************************************************************/
667		753
668	void inline_size	754	inline_speed void
669	anfds_init (ANFD *base, int count)
670	{
671	while (count--)
672	{
673	base->head = 0;
674	base->events = EV_NONE;
675	base->reify = 0;
676
677	++base;
678	}
679	}
680
681	void inline_speed
682	fd_event (EV_P_ int fd, int revents)	755	fd_event (EV_P_ int fd, int revents)
683	{	756	{
684	ANFD *anfd = anfds + fd;	757	ANFD *anfd = anfds + fd;
685	ev_io *w;	758	ev_io *w;
686		759
…		…
698	{	771	{
699	if (fd >= 0 && fd < anfdmax)	772	if (fd >= 0 && fd < anfdmax)
700	fd_event (EV_A_ fd, revents);	773	fd_event (EV_A_ fd, revents);
701	}	774	}
702		775
703	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
704	fd_reify (EV_P)	779	fd_reify (EV_P)
705	{	780	{
706	int i;	781	int i;
707		782
708	for (i = 0; i < fdchangecnt; ++i)	783	for (i = 0; i < fdchangecnt; ++i)
…		…
723	#ifdef EV_FD_TO_WIN32_HANDLE	798	#ifdef EV_FD_TO_WIN32_HANDLE
724	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	799	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
725	#else	800	#else
726	anfd->handle = _get_osfhandle (fd);	801	anfd->handle = _get_osfhandle (fd);
727	#endif	802	#endif
728	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));
729	}	804	}
730	#endif	805	#endif
731		806
732	{	807	{
733	unsigned char o_events = anfd->events;	808	unsigned char o_events = anfd->events;
734	unsigned char o_reify = anfd->reify;	809	unsigned char o_reify = anfd->reify;
735		810
736	anfd->reify = 0;	811	anfd->reify = 0;
737	anfd->events = events;	812	anfd->events = events;
738		813
739	if (o_events != events || o_reify & EV_IOFDSET)	814	if (o_events != events || o_reify & EV__IOFDSET)
740	backend_modify (EV_A_ fd, o_events, events);	815	backend_modify (EV_A_ fd, o_events, events);
741	}	816	}
742	}	817	}
743		818
744	fdchangecnt = 0;	819	fdchangecnt = 0;
745	}	820	}
746		821
747	void inline_size	822	/* something about the given fd changed */
		823	inline_size void
748	fd_change (EV_P_ int fd, int flags)	824	fd_change (EV_P_ int fd, int flags)
749	{	825	{
750	unsigned char reify = anfds [fd].reify;	826	unsigned char reify = anfds [fd].reify;
751	anfds [fd].reify |= flags;	827	anfds [fd].reify |= flags;
752		828
…		…
756	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	832	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
757	fdchanges [fdchangecnt - 1] = fd;	833	fdchanges [fdchangecnt - 1] = fd;
758	}	834	}
759	}	835	}
760		836
761	void inline_speed	837	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		838	inline_speed void
762	fd_kill (EV_P_ int fd)	839	fd_kill (EV_P_ int fd)
763	{	840	{
764	ev_io *w;	841	ev_io *w;
765		842
766	while ((w = (ev_io *)anfds [fd].head))	843	while ((w = (ev_io *)anfds [fd].head))
…		…
768	ev_io_stop (EV_A_ w);	845	ev_io_stop (EV_A_ w);
769	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);
770	}	847	}
771	}	848	}
772		849
773	int inline_size	850	/* check whether the given fd is atcually valid, for error recovery */
		851	inline_size int
774	fd_valid (int fd)	852	fd_valid (int fd)
775	{	853	{
776	#ifdef _WIN32	854	#ifdef _WIN32
777	return _get_osfhandle (fd) != -1;	855	return _get_osfhandle (fd) != -1;
778	#else	856	#else
…		…
814		892
815	for (fd = 0; fd < anfdmax; ++fd)	893	for (fd = 0; fd < anfdmax; ++fd)
816	if (anfds [fd].events)	894	if (anfds [fd].events)
817	{	895	{
818	anfds [fd].events = 0;	896	anfds [fd].events = 0;
		897	anfds [fd].emask = 0;
819	fd_change (EV_A_ fd, EV_IOFDSET | 1);	898	fd_change (EV_A_ fd, EV__IOFDSET | 1);
820	}	899	}
821	}	900	}
822		901
823	/*****************************************************************************/	902	/*****************************************************************************/
824		903
…		…
840	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	919	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
841	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	920	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
842	#define UPHEAP_DONE(p,k) ((p) == (k))	921	#define UPHEAP_DONE(p,k) ((p) == (k))
843		922
844	/* away from the root */	923	/* away from the root */
845	void inline_speed	924	inline_speed void
846	downheap (ANHE *heap, int N, int k)	925	downheap (ANHE *heap, int N, int k)
847	{	926	{
848	ANHE he = heap [k];	927	ANHE he = heap [k];
849	ANHE *E = heap + N + HEAP0;	928	ANHE *E = heap + N + HEAP0;
850		929
…		…
890	#define HEAP0 1	969	#define HEAP0 1
891	#define HPARENT(k) ((k) >> 1)	970	#define HPARENT(k) ((k) >> 1)
892	#define UPHEAP_DONE(p,k) (!(p))	971	#define UPHEAP_DONE(p,k) (!(p))
893		972
894	/* away from the root */	973	/* away from the root */
895	void inline_speed	974	inline_speed void
896	downheap (ANHE *heap, int N, int k)	975	downheap (ANHE *heap, int N, int k)
897	{	976	{
898	ANHE he = heap [k];	977	ANHE he = heap [k];
899		978
900	for (;;)	979	for (;;)
…		…
920	ev_active (ANHE_w (he)) = k;	999	ev_active (ANHE_w (he)) = k;
921	}	1000	}
922	#endif	1001	#endif
923		1002
924	/* towards the root */	1003	/* towards the root */
925	void inline_speed	1004	inline_speed void
926	upheap (ANHE *heap, int k)	1005	upheap (ANHE *heap, int k)
927	{	1006	{
928	ANHE he = heap [k];	1007	ANHE he = heap [k];
929		1008
930	for (;;)	1009	for (;;)
…		…
941		1020
942	heap [k] = he;	1021	heap [k] = he;
943	ev_active (ANHE_w (he)) = k;	1022	ev_active (ANHE_w (he)) = k;
944	}	1023	}
945		1024
946	void inline_size	1025	/* move an element suitably so it is in a correct place */
		1026	inline_size void
947	adjustheap (ANHE *heap, int N, int k)	1027	adjustheap (ANHE *heap, int N, int k)
948	{	1028	{
949	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]))
950	upheap (heap, k);	1030	upheap (heap, k);
951	else	1031	else
952	downheap (heap, N, k);	1032	downheap (heap, N, k);
953	}	1033	}
954		1034
955	/* 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 */
956	void inline_size	1036	inline_size void
957	reheap (ANHE *heap, int N)	1037	reheap (ANHE *heap, int N)
958	{	1038	{
959	int i;	1039	int i;
960		1040
961	/* 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 */
…		…
964	upheap (heap, i + HEAP0);	1044	upheap (heap, i + HEAP0);
965	}	1045	}
966		1046
967	/*****************************************************************************/	1047	/*****************************************************************************/
968		1048
		1049	/* associate signal watchers to a signal signal */
969	typedef struct	1050	typedef struct
970	{	1051	{
971	WL head;	1052	WL head;
972	EV_ATOMIC_T gotsig;	1053	EV_ATOMIC_T gotsig;
973	} ANSIG;	1054	} ANSIG;
…		…
975	static ANSIG *signals;	1056	static ANSIG *signals;
976	static int signalmax;	1057	static int signalmax;
977		1058
978	static EV_ATOMIC_T gotsig;	1059	static EV_ATOMIC_T gotsig;
979		1060
980	void inline_size
981	signals_init (ANSIG *base, int count)
982	{
983	while (count--)
984	{
985	base->head = 0;
986	base->gotsig = 0;
987
988	++base;
989	}
990	}
991
992	/*****************************************************************************/	1061	/*****************************************************************************/
993		1062
994	void inline_speed	1063	/* used to prepare libev internal fd's */
		1064	/* this is not fork-safe */
		1065	inline_speed void
995	fd_intern (int fd)	1066	fd_intern (int fd)
996	{	1067	{
997	#ifdef _WIN32	1068	#ifdef _WIN32
998	unsigned long arg = 1;	1069	unsigned long arg = 1;
999	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1070	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
1004	}	1075	}
1005		1076
1006	static void noinline	1077	static void noinline
1007	evpipe_init (EV_P)	1078	evpipe_init (EV_P)
1008	{	1079	{
1009	if (!ev_is_active (&pipeev))	1080	if (!ev_is_active (&pipe_w))
1010	{	1081	{
1011	#if EV_USE_EVENTFD	1082	#if EV_USE_EVENTFD
1012	if ((evfd = eventfd (0, 0)) >= 0)	1083	if ((evfd = eventfd (0, 0)) >= 0)
1013	{	1084	{
1014	evpipe [0] = -1;	1085	evpipe [0] = -1;
1015	fd_intern (evfd);	1086	fd_intern (evfd);
1016	ev_io_set (&pipeev, evfd, EV_READ);	1087	ev_io_set (&pipe_w, evfd, EV_READ);
1017	}	1088	}
1018	else	1089	else
1019	#endif	1090	#endif
1020	{	1091	{
1021	while (pipe (evpipe))	1092	while (pipe (evpipe))
1022	syserr ("(libev) error creating signal/async pipe");	1093	ev_syserr ("(libev) error creating signal/async pipe");
1023		1094
1024	fd_intern (evpipe [0]);	1095	fd_intern (evpipe [0]);
1025	fd_intern (evpipe [1]);	1096	fd_intern (evpipe [1]);
1026	ev_io_set (&pipeev, evpipe [0], EV_READ);	1097	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1027	}	1098	}
1028		1099
1029	ev_io_start (EV_A_ &pipeev);	1100	ev_io_start (EV_A_ &pipe_w);
1030	ev_unref (EV_A); /* watcher should not keep loop alive */	1101	ev_unref (EV_A); /* watcher should not keep loop alive */
1031	}	1102	}
1032	}	1103	}
1033		1104
1034	void inline_size	1105	inline_size void
1035	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1106	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1036	{	1107	{
1037	if (!*flag)	1108	if (!*flag)
1038	{	1109	{
1039	int old_errno = errno; /* save errno because write might clobber it */	1110	int old_errno = errno; /* save errno because write might clobber it */
…		…
1052		1123
1053	errno = old_errno;	1124	errno = old_errno;
1054	}	1125	}
1055	}	1126	}
1056		1127
		1128	/* called whenever the libev signal pipe */
		1129	/* got some events (signal, async) */
1057	static void	1130	static void
1058	pipecb (EV_P_ ev_io *iow, int revents)	1131	pipecb (EV_P_ ev_io *iow, int revents)
1059	{	1132	{
1060	#if EV_USE_EVENTFD	1133	#if EV_USE_EVENTFD
1061	if (evfd >= 0)	1134	if (evfd >= 0)
…		…
1117	ev_feed_signal_event (EV_P_ int signum)	1190	ev_feed_signal_event (EV_P_ int signum)
1118	{	1191	{
1119	WL w;	1192	WL w;
1120		1193
1121	#if EV_MULTIPLICITY	1194	#if EV_MULTIPLICITY
1122	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));
1123	#endif	1196	#endif
1124		1197
1125	--signum;	1198	--signum;
1126		1199
1127	if (signum < 0 || signum >= signalmax)	1200	if (signum < 0 || signum >= signalmax)
…		…
1143		1216
1144	#ifndef WIFCONTINUED	1217	#ifndef WIFCONTINUED
1145	# define WIFCONTINUED(status) 0	1218	# define WIFCONTINUED(status) 0
1146	#endif	1219	#endif
1147		1220
1148	void inline_speed	1221	/* handle a single child status event */
		1222	inline_speed void
1149	child_reap (EV_P_ int chain, int pid, int status)	1223	child_reap (EV_P_ int chain, int pid, int status)
1150	{	1224	{
1151	ev_child *w;	1225	ev_child *w;
1152	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1226	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1153		1227
…		…
1166		1240
1167	#ifndef WCONTINUED	1241	#ifndef WCONTINUED
1168	# define WCONTINUED 0	1242	# define WCONTINUED 0
1169	#endif	1243	#endif
1170		1244
		1245	/* called on sigchld etc., calls waitpid */
1171	static void	1246	static void
1172	childcb (EV_P_ ev_signal *sw, int revents)	1247	childcb (EV_P_ ev_signal *sw, int revents)
1173	{	1248	{
1174	int pid, status;	1249	int pid, status;
1175		1250
…		…
1256	/* kqueue is borked on everything but netbsd apparently */	1331	/* kqueue is borked on everything but netbsd apparently */
1257	/* 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 */
1258	flags &= ~EVBACKEND_KQUEUE;	1333	flags &= ~EVBACKEND_KQUEUE;
1259	#endif	1334	#endif
1260	#ifdef __APPLE__	1335	#ifdef __APPLE__
1261	// flags &= ~EVBACKEND_KQUEUE; for documentation	1336	/* only select works correctly on that "unix-certified" platform */
1262	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 */
1263	#endif	1339	#endif
1264		1340
1265	return flags;	1341	return flags;
1266	}	1342	}
1267		1343
…		…
1287	ev_loop_count (EV_P)	1363	ev_loop_count (EV_P)
1288	{	1364	{
1289	return loop_count;	1365	return loop_count;
1290	}	1366	}
1291		1367
		1368	unsigned int
		1369	ev_loop_depth (EV_P)
		1370	{
		1371	return loop_depth;
		1372	}
		1373
1292	void	1374	void
1293	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1375	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1294	{	1376	{
1295	io_blocktime = interval;	1377	io_blocktime = interval;
1296	}	1378	}
…		…
1299	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1381	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1300	{	1382	{
1301	timeout_blocktime = interval;	1383	timeout_blocktime = interval;
1302	}	1384	}
1303		1385
		1386	/* initialise a loop structure, must be zero-initialised */
1304	static void noinline	1387	static void noinline
1305	loop_init (EV_P_ unsigned int flags)	1388	loop_init (EV_P_ unsigned int flags)
1306	{	1389	{
1307	if (!backend)	1390	if (!backend)
1308	{	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
1309	#if EV_USE_MONOTONIC	1402	#if EV_USE_MONOTONIC
		1403	if (!have_monotonic)
1310	{	1404	{
1311	struct timespec ts;	1405	struct timespec ts;
		1406
1312	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1407	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1313	have_monotonic = 1;	1408	have_monotonic = 1;
1314	}	1409	}
1315	#endif	1410	#endif
1316		1411
1317	ev_rt_now = ev_time ();	1412	ev_rt_now = ev_time ();
1318	mn_now = get_clock ();	1413	mn_now = get_clock ();
1319	now_floor = mn_now;	1414	now_floor = mn_now;
…		…
1356	#endif	1451	#endif
1357	#if EV_USE_SELECT	1452	#if EV_USE_SELECT
1358	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1453	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1359	#endif	1454	#endif
1360		1455
		1456	ev_prepare_init (&pending_w, pendingcb);
		1457
1361	ev_init (&pipeev, pipecb);	1458	ev_init (&pipe_w, pipecb);
1362	ev_set_priority (&pipeev, EV_MAXPRI);	1459	ev_set_priority (&pipe_w, EV_MAXPRI);
1363	}	1460	}
1364	}	1461	}
1365		1462
		1463	/* free up a loop structure */
1366	static void noinline	1464	static void noinline
1367	loop_destroy (EV_P)	1465	loop_destroy (EV_P)
1368	{	1466	{
1369	int i;	1467	int i;
1370		1468
1371	if (ev_is_active (&pipeev))	1469	if (ev_is_active (&pipe_w))
1372	{	1470	{
1373	ev_ref (EV_A); /* signal watcher */	1471	ev_ref (EV_A); /* signal watcher */
1374	ev_io_stop (EV_A_ &pipeev);	1472	ev_io_stop (EV_A_ &pipe_w);
1375		1473
1376	#if EV_USE_EVENTFD	1474	#if EV_USE_EVENTFD
1377	if (evfd >= 0)	1475	if (evfd >= 0)
1378	close (evfd);	1476	close (evfd);
1379	#endif	1477	#endif
…		…
1418	}	1516	}
1419		1517
1420	ev_free (anfds); anfdmax = 0;	1518	ev_free (anfds); anfdmax = 0;
1421		1519
1422	/* 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);
1423	array_free (fdchange, EMPTY);	1522	array_free (fdchange, EMPTY);
1424	array_free (timer, EMPTY);	1523	array_free (timer, EMPTY);
1425	#if EV_PERIODIC_ENABLE	1524	#if EV_PERIODIC_ENABLE
1426	array_free (periodic, EMPTY);	1525	array_free (periodic, EMPTY);
1427	#endif	1526	#endif
…		…
1436		1535
1437	backend = 0;	1536	backend = 0;
1438	}	1537	}
1439		1538
1440	#if EV_USE_INOTIFY	1539	#if EV_USE_INOTIFY
1441	void inline_size infy_fork (EV_P);	1540	inline_size void infy_fork (EV_P);
1442	#endif	1541	#endif
1443		1542
1444	void inline_size	1543	inline_size void
1445	loop_fork (EV_P)	1544	loop_fork (EV_P)
1446	{	1545	{
1447	#if EV_USE_PORT	1546	#if EV_USE_PORT
1448	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1547	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1449	#endif	1548	#endif
…		…
1455	#endif	1554	#endif
1456	#if EV_USE_INOTIFY	1555	#if EV_USE_INOTIFY
1457	infy_fork (EV_A);	1556	infy_fork (EV_A);
1458	#endif	1557	#endif
1459		1558
1460	if (ev_is_active (&pipeev))	1559	if (ev_is_active (&pipe_w))
1461	{	1560	{
1462	/* this "locks" the handlers against writing to the pipe */	1561	/* this "locks" the handlers against writing to the pipe */
1463	/* while we modify the fd vars */	1562	/* while we modify the fd vars */
1464	gotsig = 1;	1563	gotsig = 1;
1465	#if EV_ASYNC_ENABLE	1564	#if EV_ASYNC_ENABLE
1466	gotasync = 1;	1565	gotasync = 1;
1467	#endif	1566	#endif
1468		1567
1469	ev_ref (EV_A);	1568	ev_ref (EV_A);
1470	ev_io_stop (EV_A_ &pipeev);	1569	ev_io_stop (EV_A_ &pipe_w);
1471		1570
1472	#if EV_USE_EVENTFD	1571	#if EV_USE_EVENTFD
1473	if (evfd >= 0)	1572	if (evfd >= 0)
1474	close (evfd);	1573	close (evfd);
1475	#endif	1574	#endif
…		…
1480	close (evpipe [1]);	1579	close (evpipe [1]);
1481	}	1580	}
1482		1581
1483	evpipe_init (EV_A);	1582	evpipe_init (EV_A);
1484	/* now iterate over everything, in case we missed something */	1583	/* now iterate over everything, in case we missed something */
1485	pipecb (EV_A_ &pipeev, EV_READ);	1584	pipecb (EV_A_ &pipe_w, EV_READ);
1486	}	1585	}
1487		1586
1488	postfork = 0;	1587	postfork = 0;
1489	}	1588	}
1490		1589
…		…
1520		1619
1521	#if EV_VERIFY	1620	#if EV_VERIFY
1522	static void noinline	1621	static void noinline
1523	verify_watcher (EV_P_ W w)	1622	verify_watcher (EV_P_ W w)
1524	{	1623	{
1525	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1624	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1526		1625
1527	if (w->pending)	1626	if (w->pending)
1528	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));
1529	}	1628	}
1530		1629
1531	static void noinline	1630	static void noinline
1532	verify_heap (EV_P_ ANHE *heap, int N)	1631	verify_heap (EV_P_ ANHE *heap, int N)
1533	{	1632	{
1534	int i;	1633	int i;
1535		1634
1536	for (i = HEAP0; i < N + HEAP0; ++i)	1635	for (i = HEAP0; i < N + HEAP0; ++i)
1537	{	1636	{
1538	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));
1539	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])));
1540	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]))));
1541		1640
1542	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1641	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1543	}	1642	}
1544	}	1643	}
1545		1644
1546	static void noinline	1645	static void noinline
1547	array_verify (EV_P_ W *ws, int cnt)	1646	array_verify (EV_P_ W *ws, int cnt)
1548	{	1647	{
1549	while (cnt--)	1648	while (cnt--)
1550	{	1649	{
1551	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1650	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1552	verify_watcher (EV_A_ ws [cnt]);	1651	verify_watcher (EV_A_ ws [cnt]);
1553	}	1652	}
1554	}	1653	}
1555	#endif	1654	#endif
1556		1655
…		…
1563		1662
1564	assert (activecnt >= -1);	1663	assert (activecnt >= -1);
1565		1664
1566	assert (fdchangemax >= fdchangecnt);	1665	assert (fdchangemax >= fdchangecnt);
1567	for (i = 0; i < fdchangecnt; ++i)	1666	for (i = 0; i < fdchangecnt; ++i)
1568	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1667	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1569		1668
1570	assert (anfdmax >= 0);	1669	assert (anfdmax >= 0);
1571	for (i = 0; i < anfdmax; ++i)	1670	for (i = 0; i < anfdmax; ++i)
1572	for (w = anfds [i].head; w; w = w->next)	1671	for (w = anfds [i].head; w; w = w->next)
1573	{	1672	{
1574	verify_watcher (EV_A_ (W)w);	1673	verify_watcher (EV_A_ (W)w);
1575	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1674	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1576	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));
1577	}	1676	}
1578		1677
1579	assert (timermax >= timercnt);	1678	assert (timermax >= timercnt);
1580	verify_heap (EV_A_ timers, timercnt);	1679	verify_heap (EV_A_ timers, timercnt);
1581		1680
…		…
1658	{	1757	{
1659	#if EV_MULTIPLICITY	1758	#if EV_MULTIPLICITY
1660	struct ev_loop *loop = ev_default_loop_ptr;	1759	struct ev_loop *loop = ev_default_loop_ptr;
1661	#endif	1760	#endif
1662		1761
		1762	ev_default_loop_ptr = 0;
		1763
1663	#ifndef _WIN32	1764	#ifndef _WIN32
1664	ev_ref (EV_A); /* child watcher */	1765	ev_ref (EV_A); /* child watcher */
1665	ev_signal_stop (EV_A_ &childev);	1766	ev_signal_stop (EV_A_ &childev);
1666	#endif	1767	#endif
1667		1768
…		…
1673	{	1774	{
1674	#if EV_MULTIPLICITY	1775	#if EV_MULTIPLICITY
1675	struct ev_loop *loop = ev_default_loop_ptr;	1776	struct ev_loop *loop = ev_default_loop_ptr;
1676	#endif	1777	#endif
1677		1778
1678	if (backend)
1679	postfork = 1; /* must be in line with ev_loop_fork */	1779	postfork = 1; /* must be in line with ev_loop_fork */
1680	}	1780	}
1681		1781
1682	/*****************************************************************************/	1782	/*****************************************************************************/
1683		1783
1684	void	1784	void
1685	ev_invoke (EV_P_ void *w, int revents)	1785	ev_invoke (EV_P_ void *w, int revents)
1686	{	1786	{
1687	EV_CB_INVOKE ((W)w, revents);	1787	EV_CB_INVOKE ((W)w, revents);
1688	}	1788	}
1689		1789
1690	void inline_speed	1790	inline_speed void
1691	call_pending (EV_P)	1791	call_pending (EV_P)
1692	{	1792	{
1693	int pri;	1793	int pri;
1694		1794
1695	for (pri = NUMPRI; pri--; )	1795	for (pri = NUMPRI; pri--; )
1696	while (pendingcnt [pri])	1796	while (pendingcnt [pri])
1697	{	1797	{
1698	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1798	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1699		1799
1700	if (expect_true (p->w))
1701	{
1702	/*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 */
1703		1802
1704	p->w->pending = 0;	1803	p->w->pending = 0;
1705	EV_CB_INVOKE (p->w, p->events);	1804	EV_CB_INVOKE (p->w, p->events);
1706	EV_FREQUENT_CHECK;	1805	EV_FREQUENT_CHECK;
1707	}
1708	}	1806	}
1709	}	1807	}
1710		1808
1711	#if EV_IDLE_ENABLE	1809	#if EV_IDLE_ENABLE
1712	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
1713	idle_reify (EV_P)	1813	idle_reify (EV_P)
1714	{	1814	{
1715	if (expect_false (idleall))	1815	if (expect_false (idleall))
1716	{	1816	{
1717	int pri;	1817	int pri;
…		…
1729	}	1829	}
1730	}	1830	}
1731	}	1831	}
1732	#endif	1832	#endif
1733		1833
1734	void inline_size	1834	/* make timers pending */
		1835	inline_size void
1735	timers_reify (EV_P)	1836	timers_reify (EV_P)
1736	{	1837	{
1737	EV_FREQUENT_CHECK;	1838	EV_FREQUENT_CHECK;
1738		1839
1739	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1840	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1740	{	1841	{
1741	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1842	do
1742
1743	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1744
1745	/* first reschedule or stop timer */
1746	if (w->repeat)
1747	{	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	{
1748	ev_at (w) += w->repeat;	1851	ev_at (w) += w->repeat;
1749	if (ev_at (w) < mn_now)	1852	if (ev_at (w) < mn_now)
1750	ev_at (w) = mn_now;	1853	ev_at (w) = mn_now;
1751		1854
1752	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.));
1753		1856
1754	ANHE_at_cache (timers [HEAP0]);	1857	ANHE_at_cache (timers [HEAP0]);
1755	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);
1756	}	1865	}
1757	else	1866	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1758	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1759		1867
1760	EV_FREQUENT_CHECK;
1761	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1868	feed_reverse_done (EV_A_ EV_TIMEOUT);
1762	}	1869	}
1763	}	1870	}
1764		1871
1765	#if EV_PERIODIC_ENABLE	1872	#if EV_PERIODIC_ENABLE
1766	void inline_size	1873	/* make periodics pending */
		1874	inline_size void
1767	periodics_reify (EV_P)	1875	periodics_reify (EV_P)
1768	{	1876	{
1769	EV_FREQUENT_CHECK;	1877	EV_FREQUENT_CHECK;
1770		1878
1771	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1879	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1772	{	1880	{
1773	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1881	int feed_count = 0;
1774		1882
1775	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1883	do
1776
1777	/* first reschedule or stop timer */
1778	if (w->reschedule_cb)
1779	{	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	{
1780	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1892	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1781		1893
1782	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));
1783		1895
1784	ANHE_at_cache (periodics [HEAP0]);	1896	ANHE_at_cache (periodics [HEAP0]);
1785	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);
1786	}	1923	}
1787	else if (w->interval)	1924	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1788	{
1789	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1790	/* if next trigger time is not sufficiently in the future, put it there */
1791	/* this might happen because of floating point inexactness */
1792	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1793	{
1794	ev_at (w) += w->interval;
1795		1925
1796	/* if interval is unreasonably low we might still have a time in the past */
1797	/* so correct this. this will make the periodic very inexact, but the user */
1798	/* has effectively asked to get triggered more often than possible */
1799	if (ev_at (w) < ev_rt_now)
1800	ev_at (w) = ev_rt_now;
1801	}
1802
1803	ANHE_at_cache (periodics [HEAP0]);
1804	downheap (periodics, periodiccnt, HEAP0);
1805	}
1806	else
1807	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1808
1809	EV_FREQUENT_CHECK;
1810	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1926	feed_reverse_done (EV_A_ EV_PERIODIC);
1811	}	1927	}
1812	}	1928	}
1813		1929
		1930	/* simply recalculate all periodics */
		1931	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1814	static void noinline	1932	static void noinline
1815	periodics_reschedule (EV_P)	1933	periodics_reschedule (EV_P)
1816	{	1934	{
1817	int i;	1935	int i;
1818		1936
…		…
1831		1949
1832	reheap (periodics, periodiccnt);	1950	reheap (periodics, periodiccnt);
1833	}	1951	}
1834	#endif	1952	#endif
1835		1953
1836	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
1837	time_update (EV_P_ ev_tstamp max_block)	1971	time_update (EV_P_ ev_tstamp max_block)
1838	{	1972	{
1839	int i;
1840
1841	#if EV_USE_MONOTONIC	1973	#if EV_USE_MONOTONIC
1842	if (expect_true (have_monotonic))	1974	if (expect_true (have_monotonic))
1843	{	1975	{
		1976	int i;
1844	ev_tstamp odiff = rtmn_diff;	1977	ev_tstamp odiff = rtmn_diff;
1845		1978
1846	mn_now = get_clock ();	1979	mn_now = get_clock ();
1847		1980
1848	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1981	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1874	ev_rt_now = ev_time ();	2007	ev_rt_now = ev_time ();
1875	mn_now = get_clock ();	2008	mn_now = get_clock ();
1876	now_floor = mn_now;	2009	now_floor = mn_now;
1877	}	2010	}
1878		2011
		2012	/* no timer adjustment, as the monotonic clock doesn't jump */
		2013	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1879	# if EV_PERIODIC_ENABLE	2014	# if EV_PERIODIC_ENABLE
1880	periodics_reschedule (EV_A);	2015	periodics_reschedule (EV_A);
1881	# endif	2016	# endif
1882	/* no timer adjustment, as the monotonic clock doesn't jump */
1883	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1884	}	2017	}
1885	else	2018	else
1886	#endif	2019	#endif
1887	{	2020	{
1888	ev_rt_now = ev_time ();	2021	ev_rt_now = ev_time ();
1889		2022
1890	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))
1891	{	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);
1892	#if EV_PERIODIC_ENABLE	2027	#if EV_PERIODIC_ENABLE
1893	periodics_reschedule (EV_A);	2028	periodics_reschedule (EV_A);
1894	#endif	2029	#endif
1895	/* adjust timers. this is easy, as the offset is the same for all of them */
1896	for (i = 0; i < timercnt; ++i)
1897	{
1898	ANHE *he = timers + i + HEAP0;
1899	ANHE_w (*he)->at += ev_rt_now - mn_now;
1900	ANHE_at_cache (*he);
1901	}
1902	}	2030	}
1903		2031
1904	mn_now = ev_rt_now;	2032	mn_now = ev_rt_now;
1905	}	2033	}
1906	}	2034	}
1907		2035
1908	void	2036	void
1909	ev_ref (EV_P)
1910	{
1911	++activecnt;
1912	}
1913
1914	void
1915	ev_unref (EV_P)
1916	{
1917	--activecnt;
1918	}
1919
1920	void
1921	ev_now_update (EV_P)
1922	{
1923	time_update (EV_A_ 1e100);
1924	}
1925
1926	static int loop_done;
1927
1928	void
1929	ev_loop (EV_P_ int flags)	2037	ev_loop (EV_P_ int flags)
1930	{	2038	{
		2039	++loop_depth;
		2040
1931	loop_done = EVUNLOOP_CANCEL;	2041	loop_done = EVUNLOOP_CANCEL;
1932		2042
1933	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 */
1934		2044
1935	do	2045	do
…		…
1962	{	2072	{
1963	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2073	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1964	call_pending (EV_A);	2074	call_pending (EV_A);
1965	}	2075	}
1966		2076
1967	if (expect_false (!activecnt))
1968	break;
1969
1970	/* we might have forked, so reify kernel state if necessary */	2077	/* we might have forked, so reify kernel state if necessary */
1971	if (expect_false (postfork))	2078	if (expect_false (postfork))
1972	loop_fork (EV_A);	2079	loop_fork (EV_A);
1973		2080
1974	/* update fd-related kernel structures */	2081	/* update fd-related kernel structures */
…		…
1979	ev_tstamp waittime = 0.;	2086	ev_tstamp waittime = 0.;
1980	ev_tstamp sleeptime = 0.;	2087	ev_tstamp sleeptime = 0.;
1981		2088
1982	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2089	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1983	{	2090	{
		2091	/* remember old timestamp for io_blocktime calculation */
		2092	ev_tstamp prev_mn_now = mn_now;
		2093
1984	/* update time to cancel out callback processing overhead */	2094	/* update time to cancel out callback processing overhead */
1985	time_update (EV_A_ 1e100);	2095	time_update (EV_A_ 1e100);
1986		2096
1987	waittime = MAX_BLOCKTIME;	2097	waittime = MAX_BLOCKTIME;
1988		2098
…		…
1998	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;
1999	if (waittime > to) waittime = to;	2109	if (waittime > to) waittime = to;
2000	}	2110	}
2001	#endif	2111	#endif
2002		2112
		2113	/* don't let timeouts decrease the waittime below timeout_blocktime */
2003	if (expect_false (waittime < timeout_blocktime))	2114	if (expect_false (waittime < timeout_blocktime))
2004	waittime = timeout_blocktime;	2115	waittime = timeout_blocktime;
2005		2116
2006	sleeptime = waittime - backend_fudge;	2117	/* extra check because io_blocktime is commonly 0 */
2007
2008	if (expect_true (sleeptime > io_blocktime))	2118	if (expect_false (io_blocktime))
2009	sleeptime = io_blocktime;
2010
2011	if (sleeptime)
2012	{	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	{
2013	ev_sleep (sleeptime);	2127	ev_sleep (sleeptime);
2014	waittime -= sleeptime;	2128	waittime -= sleeptime;
		2129	}
2015	}	2130	}
2016	}	2131	}
2017		2132
2018	++loop_count;	2133	++loop_count;
2019	backend_poll (EV_A_ waittime);	2134	backend_poll (EV_A_ waittime);
…		…
2045	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2160	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2046	));	2161	));
2047		2162
2048	if (loop_done == EVUNLOOP_ONE)	2163	if (loop_done == EVUNLOOP_ONE)
2049	loop_done = EVUNLOOP_CANCEL;	2164	loop_done = EVUNLOOP_CANCEL;
		2165
		2166	--loop_depth;
2050	}	2167	}
2051		2168
2052	void	2169	void
2053	ev_unloop (EV_P_ int how)	2170	ev_unloop (EV_P_ int how)
2054	{	2171	{
2055	loop_done = how;	2172	loop_done = how;
2056	}	2173	}
2057		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
2058	/*****************************************************************************/	2212	/*****************************************************************************/
		2213	/* singly-linked list management, used when the expected list length is short */
2059		2214
2060	void inline_size	2215	inline_size void
2061	wlist_add (WL *head, WL elem)	2216	wlist_add (WL *head, WL elem)
2062	{	2217	{
2063	elem->next = *head;	2218	elem->next = *head;
2064	*head = elem;	2219	*head = elem;
2065	}	2220	}
2066		2221
2067	void inline_size	2222	inline_size void
2068	wlist_del (WL *head, WL elem)	2223	wlist_del (WL *head, WL elem)
2069	{	2224	{
2070	while (*head)	2225	while (*head)
2071	{	2226	{
2072	if (*head == elem)	2227	if (*head == elem)
…		…
2077		2232
2078	head = &(*head)->next;	2233	head = &(*head)->next;
2079	}	2234	}
2080	}	2235	}
2081		2236
2082	void inline_speed	2237	/* internal, faster, version of ev_clear_pending */
		2238	inline_speed void
2083	clear_pending (EV_P_ W w)	2239	clear_pending (EV_P_ W w)
2084	{	2240	{
2085	if (w->pending)	2241	if (w->pending)
2086	{	2242	{
2087	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2243	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2088	w->pending = 0;	2244	w->pending = 0;
2089	}	2245	}
2090	}	2246	}
2091		2247
2092	int	2248	int
…		…
2096	int pending = w_->pending;	2252	int pending = w_->pending;
2097		2253
2098	if (expect_true (pending))	2254	if (expect_true (pending))
2099	{	2255	{
2100	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2256	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2257	p->w = (W)&pending_w;
2101	w_->pending = 0;	2258	w_->pending = 0;
2102	p->w = 0;
2103	return p->events;	2259	return p->events;
2104	}	2260	}
2105	else	2261	else
2106	return 0;	2262	return 0;
2107	}	2263	}
2108		2264
2109	void inline_size	2265	inline_size void
2110	pri_adjust (EV_P_ W w)	2266	pri_adjust (EV_P_ W w)
2111	{	2267	{
2112	int pri = w->priority;	2268	int pri = ev_priority (w);
2113	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2269	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2114	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2270	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2115	w->priority = pri;	2271	ev_set_priority (w, pri);
2116	}	2272	}
2117		2273
2118	void inline_speed	2274	inline_speed void
2119	ev_start (EV_P_ W w, int active)	2275	ev_start (EV_P_ W w, int active)
2120	{	2276	{
2121	pri_adjust (EV_A_ w);	2277	pri_adjust (EV_A_ w);
2122	w->active = active;	2278	w->active = active;
2123	ev_ref (EV_A);	2279	ev_ref (EV_A);
2124	}	2280	}
2125		2281
2126	void inline_size	2282	inline_size void
2127	ev_stop (EV_P_ W w)	2283	ev_stop (EV_P_ W w)
2128	{	2284	{
2129	ev_unref (EV_A);	2285	ev_unref (EV_A);
2130	w->active = 0;	2286	w->active = 0;
2131	}	2287	}
…		…
2138	int fd = w->fd;	2294	int fd = w->fd;
2139		2295
2140	if (expect_false (ev_is_active (w)))	2296	if (expect_false (ev_is_active (w)))
2141	return;	2297	return;
2142		2298
2143	assert (("ev_io_start called with negative fd", fd >= 0));	2299	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2300	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2144		2301
2145	EV_FREQUENT_CHECK;	2302	EV_FREQUENT_CHECK;
2146		2303
2147	ev_start (EV_A_ (W)w, 1);	2304	ev_start (EV_A_ (W)w, 1);
2148	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2305	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2149	wlist_add (&anfds[fd].head, (WL)w);	2306	wlist_add (&anfds[fd].head, (WL)w);
2150		2307
2151	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2308	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2152	w->events &= ~EV_IOFDSET;	2309	w->events &= ~EV__IOFDSET;
2153		2310
2154	EV_FREQUENT_CHECK;	2311	EV_FREQUENT_CHECK;
2155	}	2312	}
2156		2313
2157	void noinline	2314	void noinline
…		…
2159	{	2316	{
2160	clear_pending (EV_A_ (W)w);	2317	clear_pending (EV_A_ (W)w);
2161	if (expect_false (!ev_is_active (w)))	2318	if (expect_false (!ev_is_active (w)))
2162	return;	2319	return;
2163		2320
2164	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));
2165		2322
2166	EV_FREQUENT_CHECK;	2323	EV_FREQUENT_CHECK;
2167		2324
2168	wlist_del (&anfds[w->fd].head, (WL)w);	2325	wlist_del (&anfds[w->fd].head, (WL)w);
2169	ev_stop (EV_A_ (W)w);	2326	ev_stop (EV_A_ (W)w);
…		…
2179	if (expect_false (ev_is_active (w)))	2336	if (expect_false (ev_is_active (w)))
2180	return;	2337	return;
2181		2338
2182	ev_at (w) += mn_now;	2339	ev_at (w) += mn_now;
2183		2340
2184	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.));
2185		2342
2186	EV_FREQUENT_CHECK;	2343	EV_FREQUENT_CHECK;
2187		2344
2188	++timercnt;	2345	++timercnt;
2189	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2346	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2192	ANHE_at_cache (timers [ev_active (w)]);	2349	ANHE_at_cache (timers [ev_active (w)]);
2193	upheap (timers, ev_active (w));	2350	upheap (timers, ev_active (w));
2194		2351
2195	EV_FREQUENT_CHECK;	2352	EV_FREQUENT_CHECK;
2196		2353
2197	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2354	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2198	}	2355	}
2199		2356
2200	void noinline	2357	void noinline
2201	ev_timer_stop (EV_P_ ev_timer *w)	2358	ev_timer_stop (EV_P_ ev_timer *w)
2202	{	2359	{
…		…
2207	EV_FREQUENT_CHECK;	2364	EV_FREQUENT_CHECK;
2208		2365
2209	{	2366	{
2210	int active = ev_active (w);	2367	int active = ev_active (w);
2211		2368
2212	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2369	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2213		2370
2214	--timercnt;	2371	--timercnt;
2215		2372
2216	if (expect_true (active < timercnt + HEAP0))	2373	if (expect_true (active < timercnt + HEAP0))
2217	{	2374	{
…		…
2261		2418
2262	if (w->reschedule_cb)	2419	if (w->reschedule_cb)
2263	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2420	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2264	else if (w->interval)	2421	else if (w->interval)
2265	{	2422	{
2266	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.));
2267	/* 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 */
2268	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;
2269	}	2426	}
2270	else	2427	else
2271	ev_at (w) = w->offset;	2428	ev_at (w) = w->offset;
…		…
2279	ANHE_at_cache (periodics [ev_active (w)]);	2436	ANHE_at_cache (periodics [ev_active (w)]);
2280	upheap (periodics, ev_active (w));	2437	upheap (periodics, ev_active (w));
2281		2438
2282	EV_FREQUENT_CHECK;	2439	EV_FREQUENT_CHECK;
2283		2440
2284	/*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));*/
2285	}	2442	}
2286		2443
2287	void noinline	2444	void noinline
2288	ev_periodic_stop (EV_P_ ev_periodic *w)	2445	ev_periodic_stop (EV_P_ ev_periodic *w)
2289	{	2446	{
…		…
2294	EV_FREQUENT_CHECK;	2451	EV_FREQUENT_CHECK;
2295		2452
2296	{	2453	{
2297	int active = ev_active (w);	2454	int active = ev_active (w);
2298		2455
2299	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2456	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2300		2457
2301	--periodiccnt;	2458	--periodiccnt;
2302		2459
2303	if (expect_true (active < periodiccnt + HEAP0))	2460	if (expect_true (active < periodiccnt + HEAP0))
2304	{	2461	{
…		…
2327		2484
2328	void noinline	2485	void noinline
2329	ev_signal_start (EV_P_ ev_signal *w)	2486	ev_signal_start (EV_P_ ev_signal *w)
2330	{	2487	{
2331	#if EV_MULTIPLICITY	2488	#if EV_MULTIPLICITY
2332	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));
2333	#endif	2490	#endif
2334	if (expect_false (ev_is_active (w)))	2491	if (expect_false (ev_is_active (w)))
2335	return;	2492	return;
2336		2493
2337	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));
2338		2495
2339	evpipe_init (EV_A);	2496	evpipe_init (EV_A);
2340		2497
2341	EV_FREQUENT_CHECK;	2498	EV_FREQUENT_CHECK;
2342		2499
…		…
2345	sigset_t full, prev;	2502	sigset_t full, prev;
2346	sigfillset (&full);	2503	sigfillset (&full);
2347	sigprocmask (SIG_SETMASK, &full, &prev);	2504	sigprocmask (SIG_SETMASK, &full, &prev);
2348	#endif	2505	#endif
2349		2506
2350	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2507	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2351		2508
2352	#ifndef _WIN32	2509	#ifndef _WIN32
2353	sigprocmask (SIG_SETMASK, &prev, 0);	2510	sigprocmask (SIG_SETMASK, &prev, 0);
2354	#endif	2511	#endif
2355	}	2512	}
…		…
2393		2550
2394	void	2551	void
2395	ev_child_start (EV_P_ ev_child *w)	2552	ev_child_start (EV_P_ ev_child *w)
2396	{	2553	{
2397	#if EV_MULTIPLICITY	2554	#if EV_MULTIPLICITY
2398	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));
2399	#endif	2556	#endif
2400	if (expect_false (ev_is_active (w)))	2557	if (expect_false (ev_is_active (w)))
2401	return;	2558	return;
2402		2559
2403	EV_FREQUENT_CHECK;	2560	EV_FREQUENT_CHECK;
…		…
2428	# ifdef _WIN32	2585	# ifdef _WIN32
2429	# undef lstat	2586	# undef lstat
2430	# define lstat(a,b) _stati64 (a,b)	2587	# define lstat(a,b) _stati64 (a,b)
2431	# endif	2588	# endif
2432		2589
2433	#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 */
2434	#define MIN_STAT_INTERVAL 0.1074891	2592	#define MIN_STAT_INTERVAL 0.1074891
2435		2593
2436	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);
2437		2595
2438	#if EV_USE_INOTIFY	2596	#if EV_USE_INOTIFY
2439	# define EV_INOTIFY_BUFSIZE 8192	2597	# define EV_INOTIFY_BUFSIZE 8192
…		…
2443	{	2601	{
2444	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);
2445		2603
2446	if (w->wd < 0)	2604	if (w->wd < 0)
2447	{	2605	{
		2606	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2448	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 */
2449		2608
2450	/* monitor some parent directory for speedup hints */	2609	/* monitor some parent directory for speedup hints */
2451	/* note that exceeding the hardcoded limit is not a correctness issue, */	2610	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2452	/* but an efficiency issue only */	2611	/* but an efficiency issue only */
2453	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2612	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2454	{	2613	{
2455	char path [4096];	2614	char path [4096];
2456	strcpy (path, w->path);	2615	strcpy (path, w->path);
…		…
2460	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2619	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2461	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2620	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2462		2621
2463	char *pend = strrchr (path, '/');	2622	char *pend = strrchr (path, '/');
2464		2623
2465	if (!pend)	2624	if (!pend || pend == path)
2466	break; /* whoops, no '/', complain to your admin */	2625	break;
2467		2626
2468	*pend = 0;	2627	*pend = 0;
2469	w->wd = inotify_add_watch (fs_fd, path, mask);	2628	w->wd = inotify_add_watch (fs_fd, path, mask);
2470	}	2629	}
2471	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2630	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2472	}	2631	}
2473	}	2632	}
2474	else
2475	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2476		2633
2477	if (w->wd >= 0)	2634	if (w->wd >= 0)
		2635	{
2478	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	}
2479	}	2655	}
2480		2656
2481	static void noinline	2657	static void noinline
2482	infy_del (EV_P_ ev_stat *w)	2658	infy_del (EV_P_ ev_stat *w)
2483	{	2659	{
…		…
2513		2689
2514	if (w->wd == wd || wd == -1)	2690	if (w->wd == wd || wd == -1)
2515	{	2691	{
2516	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2692	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2517	{	2693	{
		2694	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2518	w->wd = -1;	2695	w->wd = -1;
2519	infy_add (EV_A_ w); /* re-add, no matter what */	2696	infy_add (EV_A_ w); /* re-add, no matter what */
2520	}	2697	}
2521		2698
2522	stat_timer_cb (EV_A_ &w->timer, 0);	2699	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2535		2712
2536	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)
2537	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2714	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2538	}	2715	}
2539		2716
2540	void inline_size	2717	inline_size void
2541	infy_init (EV_P)	2718	check_2625 (EV_P)
2542	{	2719	{
2543	if (fs_fd != -2)
2544	return;
2545
2546	/* kernels < 2.6.25 are borked	2720	/* kernels < 2.6.25 are borked
2547	* 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
2548	*/	2722	*/
2549	{
2550	struct utsname buf;	2723	struct utsname buf;
2551	int major, minor, micro;	2724	int major, minor, micro;
2552		2725
2553	fs_fd = -1;
2554
2555	if (uname (&buf))	2726	if (uname (&buf))
2556	return;	2727	return;
2557		2728
2558	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2729	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2559	return;	2730	return;
2560		2731
2561	if (major < 2	2732	if (major < 2
2562	|| (major == 2 && minor < 6)	2733	|| (major == 2 && minor < 6)
2563	|| (major == 2 && minor == 6 && micro < 25))	2734	|| (major == 2 && minor == 6 && micro < 25))
2564	return;	2735	return;
2565	}	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);
2566		2749
2567	fs_fd = inotify_init ();	2750	fs_fd = inotify_init ();
2568		2751
2569	if (fs_fd >= 0)	2752	if (fs_fd >= 0)
2570	{	2753	{
…		…
2572	ev_set_priority (&fs_w, EV_MAXPRI);	2755	ev_set_priority (&fs_w, EV_MAXPRI);
2573	ev_io_start (EV_A_ &fs_w);	2756	ev_io_start (EV_A_ &fs_w);
2574	}	2757	}
2575	}	2758	}
2576		2759
2577	void inline_size	2760	inline_size void
2578	infy_fork (EV_P)	2761	infy_fork (EV_P)
2579	{	2762	{
2580	int slot;	2763	int slot;
2581		2764
2582	if (fs_fd < 0)	2765	if (fs_fd < 0)
…		…
2598	w->wd = -1;	2781	w->wd = -1;
2599		2782
2600	if (fs_fd >= 0)	2783	if (fs_fd >= 0)
2601	infy_add (EV_A_ w); /* re-add, no matter what */	2784	infy_add (EV_A_ w); /* re-add, no matter what */
2602	else	2785	else
2603	ev_timer_start (EV_A_ &w->timer);	2786	ev_timer_again (EV_A_ &w->timer);
2604	}	2787	}
2605	}	2788	}
2606	}	2789	}
2607		2790
2608	#endif	2791	#endif
…		…
2663	ev_stat_start (EV_P_ ev_stat *w)	2846	ev_stat_start (EV_P_ ev_stat *w)
2664	{	2847	{
2665	if (expect_false (ev_is_active (w)))	2848	if (expect_false (ev_is_active (w)))
2666	return;	2849	return;
2667		2850
2668	/* since we use memcmp, we need to clear any padding data etc. */
2669	memset (&w->prev, 0, sizeof (ev_statdata));
2670	memset (&w->attr, 0, sizeof (ev_statdata));
2671
2672	ev_stat_stat (EV_A_ w);	2851	ev_stat_stat (EV_A_ w);
2673		2852
		2853	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2674	if (w->interval < MIN_STAT_INTERVAL)	2854	w->interval = MIN_STAT_INTERVAL;
2675	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2676		2855
2677	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);
2678	ev_set_priority (&w->timer, ev_priority (w));	2857	ev_set_priority (&w->timer, ev_priority (w));
2679		2858
2680	#if EV_USE_INOTIFY	2859	#if EV_USE_INOTIFY
2681	infy_init (EV_A);	2860	infy_init (EV_A);
2682		2861
2683	if (fs_fd >= 0)	2862	if (fs_fd >= 0)
2684	infy_add (EV_A_ w);	2863	infy_add (EV_A_ w);
2685	else	2864	else
2686	#endif	2865	#endif
2687	ev_timer_start (EV_A_ &w->timer);	2866	ev_timer_again (EV_A_ &w->timer);
2688		2867
2689	ev_start (EV_A_ (W)w, 1);	2868	ev_start (EV_A_ (W)w, 1);
2690		2869
2691	EV_FREQUENT_CHECK;	2870	EV_FREQUENT_CHECK;
2692	}	2871	}
…		…
2867	static void	3046	static void
2868	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3047	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2869	{	3048	{
2870	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));
2871		3050
		3051	ev_embed_stop (EV_A_ w);
		3052
2872	{	3053	{
2873	struct ev_loop *loop = w->other;	3054	struct ev_loop *loop = w->other;
2874		3055
2875	ev_loop_fork (EV_A);	3056	ev_loop_fork (EV_A);
		3057	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2876	}	3058	}
		3059
		3060	ev_embed_start (EV_A_ w);
2877	}	3061	}
2878		3062
2879	#if 0	3063	#if 0
2880	static void	3064	static void
2881	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3065	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2890	if (expect_false (ev_is_active (w)))	3074	if (expect_false (ev_is_active (w)))
2891	return;	3075	return;
2892		3076
2893	{	3077	{
2894	struct ev_loop *loop = w->other;	3078	struct ev_loop *loop = w->other;
2895	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 ()));
2896	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);
2897	}	3081	}
2898		3082
2899	EV_FREQUENT_CHECK;	3083	EV_FREQUENT_CHECK;
2900		3084
…		…
3083	ev_timer_set (&once->to, timeout, 0.);	3267	ev_timer_set (&once->to, timeout, 0.);
3084	ev_timer_start (EV_A_ &once->to);	3268	ev_timer_start (EV_A_ &once->to);
3085	}	3269	}
3086	}	3270	}
3087		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
3088	#if EV_MULTIPLICITY	3380	#if EV_MULTIPLICITY
3089	#include "ev_wrap.h"	3381	#include "ev_wrap.h"
3090	#endif	3382	#endif
3091		3383
3092	#ifdef __cplusplus	3384	#ifdef __cplusplus

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