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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 1.293 by root, Mon Jun 29 18:46:52 2009 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without modifica-	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:	8	* tion, are permitted provided that the following conditions are met:
9	*	9	*
…		…
47	# include EV_CONFIG_H	47	# include EV_CONFIG_H
48	# else	48	# else
49	# include "config.h"	49	# include "config.h"
50	# endif	50	# endif
51		51
		52	# if HAVE_CLOCK_SYSCALL
		53	# ifndef EV_USE_CLOCK_SYSCALL
		54	# define EV_USE_CLOCK_SYSCALL 1
		55	# ifndef EV_USE_REALTIME
		56	# define EV_USE_REALTIME 0
		57	# endif
		58	# ifndef EV_USE_MONOTONIC
		59	# define EV_USE_MONOTONIC 1
		60	# endif
		61	# endif
		62	# elif !defined(EV_USE_CLOCK_SYSCALL)
		63	# define EV_USE_CLOCK_SYSCALL 0
		64	# endif
		65
52	# if HAVE_CLOCK_GETTIME	66	# if HAVE_CLOCK_GETTIME
53	# ifndef EV_USE_MONOTONIC	67	# ifndef EV_USE_MONOTONIC
54	# define EV_USE_MONOTONIC 1	68	# define EV_USE_MONOTONIC 1
55	# endif	69	# endif
56	# ifndef EV_USE_REALTIME	70	# ifndef EV_USE_REALTIME
57	# define EV_USE_REALTIME 1	71	# define EV_USE_REALTIME 0
58	# endif	72	# endif
59	# else	73	# else
60	# ifndef EV_USE_MONOTONIC	74	# ifndef EV_USE_MONOTONIC
61	# define EV_USE_MONOTONIC 0	75	# define EV_USE_MONOTONIC 0
62	# endif	76	# endif
…		…
164	# endif	178	# endif
165	#endif	179	#endif
166		180
167	/* this block tries to deduce configuration from header-defined symbols and defaults */	181	/* this block tries to deduce configuration from header-defined symbols and defaults */
168		182
		183	#ifndef EV_USE_CLOCK_SYSCALL
		184	# if __linux && __GLIBC__ >= 2
		185	# define EV_USE_CLOCK_SYSCALL 1
		186	# else
		187	# define EV_USE_CLOCK_SYSCALL 0
		188	# endif
		189	#endif
		190
169	#ifndef EV_USE_MONOTONIC	191	#ifndef EV_USE_MONOTONIC
170	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0	192	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171	# define EV_USE_MONOTONIC 1	193	# define EV_USE_MONOTONIC 1
172	# else	194	# else
173	# define EV_USE_MONOTONIC 0	195	# define EV_USE_MONOTONIC 0
174	# endif	196	# endif
175	#endif	197	#endif
176		198
177	#ifndef EV_USE_REALTIME	199	#ifndef EV_USE_REALTIME
178	# define EV_USE_REALTIME 0	200	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
179	#endif	201	#endif
180		202
181	#ifndef EV_USE_NANOSLEEP	203	#ifndef EV_USE_NANOSLEEP
182	# if _POSIX_C_SOURCE >= 199309L	204	# if _POSIX_C_SOURCE >= 199309L
183	# define EV_USE_NANOSLEEP 1	205	# define EV_USE_NANOSLEEP 1
…		…
262		284
263	#ifndef EV_HEAP_CACHE_AT	285	#ifndef EV_HEAP_CACHE_AT
264	# define EV_HEAP_CACHE_AT !EV_MINIMAL	286	# define EV_HEAP_CACHE_AT !EV_MINIMAL
265	#endif	287	#endif
266		288
		289	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		290	/* which makes programs even slower. might work on other unices, too. */
		291	#if EV_USE_CLOCK_SYSCALL
		292	# include <syscall.h>
		293	# ifdef SYS_clock_gettime
		294	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		295	# undef EV_USE_MONOTONIC
		296	# define EV_USE_MONOTONIC 1
		297	# else
		298	# undef EV_USE_CLOCK_SYSCALL
		299	# define EV_USE_CLOCK_SYSCALL 0
		300	# endif
		301	#endif
		302
267	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	303	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
268		304
269	#ifndef CLOCK_MONOTONIC	305	#ifndef CLOCK_MONOTONIC
270	# undef EV_USE_MONOTONIC	306	# undef EV_USE_MONOTONIC
271	# define EV_USE_MONOTONIC 0	307	# define EV_USE_MONOTONIC 0
…		…
287	# endif	323	# endif
288	#endif	324	#endif
289		325
290	#if EV_USE_INOTIFY	326	#if EV_USE_INOTIFY
291	# include <sys/utsname.h>	327	# include <sys/utsname.h>
		328	# include <sys/statfs.h>
292	# include <sys/inotify.h>	329	# include <sys/inotify.h>
293	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */	330	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294	# ifndef IN_DONT_FOLLOW	331	# ifndef IN_DONT_FOLLOW
295	# undef EV_USE_INOTIFY	332	# undef EV_USE_INOTIFY
296	# define EV_USE_INOTIFY 0	333	# define EV_USE_INOTIFY 0
…		…
367	typedef ev_watcher_time *WT;	404	typedef ev_watcher_time *WT;
368		405
369	#define ev_active(w) ((W)(w))->active	406	#define ev_active(w) ((W)(w))->active
370	#define ev_at(w) ((WT)(w))->at	407	#define ev_at(w) ((WT)(w))->at
371		408
372	#if EV_USE_MONOTONIC	409	#if EV_USE_REALTIME
373	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	410	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
374	/* giving it a reasonably high chance of working on typical architetcures */	411	/* giving it a reasonably high chance of working on typical architetcures */
		412	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		413	#endif
		414
		415	#if EV_USE_MONOTONIC
375	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	416	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376	#endif	417	#endif
377		418
378	#ifdef _WIN32	419	#ifdef _WIN32
379	# include "ev_win32.c"	420	# include "ev_win32.c"
…		…
388	{	429	{
389	syserr_cb = cb;	430	syserr_cb = cb;
390	}	431	}
391		432
392	static void noinline	433	static void noinline
393	syserr (const char *msg)	434	ev_syserr (const char *msg)
394	{	435	{
395	if (!msg)	436	if (!msg)
396	msg = "(libev) system error";	437	msg = "(libev) system error";
397		438
398	if (syserr_cb)	439	if (syserr_cb)
…		…
444	#define ev_malloc(size) ev_realloc (0, (size))	485	#define ev_malloc(size) ev_realloc (0, (size))
445	#define ev_free(ptr) ev_realloc ((ptr), 0)	486	#define ev_free(ptr) ev_realloc ((ptr), 0)
446		487
447	/*****************************************************************************/	488	/*****************************************************************************/
448		489
		490	/* file descriptor info structure */
449	typedef struct	491	typedef struct
450	{	492	{
451	WL head;	493	WL head;
452	unsigned char events;	494	unsigned char events; /* the events watched for */
		495	unsigned char reify; /* flag set when this ANFD needs reification */
		496	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
453	unsigned char reify;	497	unsigned char unused;
		498	#if EV_USE_EPOLL
		499	unsigned int egen; /* generation counter to counter epoll bugs */
		500	#endif
454	#if EV_SELECT_IS_WINSOCKET	501	#if EV_SELECT_IS_WINSOCKET
455	SOCKET handle;	502	SOCKET handle;
456	#endif	503	#endif
457	} ANFD;	504	} ANFD;
458		505
		506	/* stores the pending event set for a given watcher */
459	typedef struct	507	typedef struct
460	{	508	{
461	W w;	509	W w;
462	int events;	510	int events; /* the pending event set for the given watcher */
463	} ANPENDING;	511	} ANPENDING;
464		512
465	#if EV_USE_INOTIFY	513	#if EV_USE_INOTIFY
466	/* hash table entry per inotify-id */	514	/* hash table entry per inotify-id */
467	typedef struct	515	typedef struct
…		…
470	} ANFS;	518	} ANFS;
471	#endif	519	#endif
472		520
473	/* Heap Entry */	521	/* Heap Entry */
474	#if EV_HEAP_CACHE_AT	522	#if EV_HEAP_CACHE_AT
		523	/* a heap element */
475	typedef struct {	524	typedef struct {
476	ev_tstamp at;	525	ev_tstamp at;
477	WT w;	526	WT w;
478	} ANHE;	527	} ANHE;
479		528
480	#define ANHE_w(he) (he).w /* access watcher, read-write */	529	#define ANHE_w(he) (he).w /* access watcher, read-write */
481	#define ANHE_at(he) (he).at /* access cached at, read-only */	530	#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 */	531	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
483	#else	532	#else
		533	/* a heap element */
484	typedef WT ANHE;	534	typedef WT ANHE;
485		535
486	#define ANHE_w(he) (he)	536	#define ANHE_w(he) (he)
487	#define ANHE_at(he) (he)->at	537	#define ANHE_at(he) (he)->at
488	#define ANHE_at_cache(he)	538	#define ANHE_at_cache(he)
…		…
514		564
515	#endif	565	#endif
516		566
517	/*****************************************************************************/	567	/*****************************************************************************/
518		568
		569	#ifndef EV_HAVE_EV_TIME
519	ev_tstamp	570	ev_tstamp
520	ev_time (void)	571	ev_time (void)
521	{	572	{
522	#if EV_USE_REALTIME	573	#if EV_USE_REALTIME
		574	if (expect_true (have_realtime))
		575	{
523	struct timespec ts;	576	struct timespec ts;
524	clock_gettime (CLOCK_REALTIME, &ts);	577	clock_gettime (CLOCK_REALTIME, &ts);
525	return ts.tv_sec + ts.tv_nsec * 1e-9;	578	return ts.tv_sec + ts.tv_nsec * 1e-9;
526	#else	579	}
		580	#endif
		581
527	struct timeval tv;	582	struct timeval tv;
528	gettimeofday (&tv, 0);	583	gettimeofday (&tv, 0);
529	return tv.tv_sec + tv.tv_usec * 1e-6;	584	return tv.tv_sec + tv.tv_usec * 1e-6;
530	#endif
531	}	585	}
		586	#endif
532		587
533	ev_tstamp inline_size	588	inline_size ev_tstamp
534	get_clock (void)	589	get_clock (void)
535	{	590	{
536	#if EV_USE_MONOTONIC	591	#if EV_USE_MONOTONIC
537	if (expect_true (have_monotonic))	592	if (expect_true (have_monotonic))
538	{	593	{
…		…
572		627
573	tv.tv_sec = (time_t)delay;	628	tv.tv_sec = (time_t)delay;
574	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	629	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
575		630
576	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	631	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
577	/* somehting nto guaranteed by newer posix versions, but guaranteed */	632	/* somehting not guaranteed by newer posix versions, but guaranteed */
578	/* by older ones */	633	/* by older ones */
579	select (0, 0, 0, 0, &tv);	634	select (0, 0, 0, 0, &tv);
580	#endif	635	#endif
581	}	636	}
582	}	637	}
583		638
584	/*****************************************************************************/	639	/*****************************************************************************/
585		640
586	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	641	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
587		642
588	int inline_size	643	/* find a suitable new size for the given array, */
		644	/* hopefully by rounding to a ncie-to-malloc size */
		645	inline_size int
589	array_nextsize (int elem, int cur, int cnt)	646	array_nextsize (int elem, int cur, int cnt)
590	{	647	{
591	int ncur = cur + 1;	648	int ncur = cur + 1;
592		649
593	do	650	do
…		…
610	array_realloc (int elem, void *base, int *cur, int cnt)	667	array_realloc (int elem, void *base, int *cur, int cnt)
611	{	668	{
612	*cur = array_nextsize (elem, *cur, cnt);	669	*cur = array_nextsize (elem, *cur, cnt);
613	return ev_realloc (base, elem * *cur);	670	return ev_realloc (base, elem * *cur);
614	}	671	}
		672
		673	#define array_init_zero(base,count) \
		674	memset ((void *)(base), 0, sizeof (*(base)) * (count))
615		675
616	#define array_needsize(type,base,cur,cnt,init) \	676	#define array_needsize(type,base,cur,cnt,init) \
617	if (expect_false ((cnt) > (cur))) \	677	if (expect_false ((cnt) > (cur))) \
618	{ \	678	{ \
619	int ocur_ = (cur); \	679	int ocur_ = (cur); \
…		…
631	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	691	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
632	}	692	}
633	#endif	693	#endif
634		694
635	#define array_free(stem, idx) \	695	#define array_free(stem, idx) \
636	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	696	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
637		697
638	/*****************************************************************************/	698	/*****************************************************************************/
		699
		700	/* dummy callback for pending events */
		701	static void noinline
		702	pendingcb (EV_P_ ev_prepare *w, int revents)
		703	{
		704	}
639		705
640	void noinline	706	void noinline
641	ev_feed_event (EV_P_ void *w, int revents)	707	ev_feed_event (EV_P_ void *w, int revents)
642	{	708	{
643	W w_ = (W)w;	709	W w_ = (W)w;
…		…
652	pendings [pri][w_->pending - 1].w = w_;	718	pendings [pri][w_->pending - 1].w = w_;
653	pendings [pri][w_->pending - 1].events = revents;	719	pendings [pri][w_->pending - 1].events = revents;
654	}	720	}
655	}	721	}
656		722
657	void inline_speed	723	inline_speed void
		724	feed_reverse (EV_P_ W w)
		725	{
		726	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		727	rfeeds [rfeedcnt++] = w;
		728	}
		729
		730	inline_size void
		731	feed_reverse_done (EV_P_ int revents)
		732	{
		733	do
		734	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		735	while (rfeedcnt);
		736	}
		737
		738	inline_speed void
658	queue_events (EV_P_ W *events, int eventcnt, int type)	739	queue_events (EV_P_ W *events, int eventcnt, int type)
659	{	740	{
660	int i;	741	int i;
661		742
662	for (i = 0; i < eventcnt; ++i)	743	for (i = 0; i < eventcnt; ++i)
663	ev_feed_event (EV_A_ events [i], type);	744	ev_feed_event (EV_A_ events [i], type);
664	}	745	}
665		746
666	/*****************************************************************************/	747	/*****************************************************************************/
667		748
668	void inline_size	749	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)	750	fd_event (EV_P_ int fd, int revents)
683	{	751	{
684	ANFD *anfd = anfds + fd;	752	ANFD *anfd = anfds + fd;
685	ev_io *w;	753	ev_io *w;
686		754
…		…
698	{	766	{
699	if (fd >= 0 && fd < anfdmax)	767	if (fd >= 0 && fd < anfdmax)
700	fd_event (EV_A_ fd, revents);	768	fd_event (EV_A_ fd, revents);
701	}	769	}
702		770
703	void inline_size	771	/* make sure the external fd watch events are in-sync */
		772	/* with the kernel/libev internal state */
		773	inline_size void
704	fd_reify (EV_P)	774	fd_reify (EV_P)
705	{	775	{
706	int i;	776	int i;
707		777
708	for (i = 0; i < fdchangecnt; ++i)	778	for (i = 0; i < fdchangecnt; ++i)
…		…
723	#ifdef EV_FD_TO_WIN32_HANDLE	793	#ifdef EV_FD_TO_WIN32_HANDLE
724	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	794	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
725	#else	795	#else
726	anfd->handle = _get_osfhandle (fd);	796	anfd->handle = _get_osfhandle (fd);
727	#endif	797	#endif
728	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	798	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
729	}	799	}
730	#endif	800	#endif
731		801
732	{	802	{
733	unsigned char o_events = anfd->events;	803	unsigned char o_events = anfd->events;
734	unsigned char o_reify = anfd->reify;	804	unsigned char o_reify = anfd->reify;
735		805
736	anfd->reify = 0;	806	anfd->reify = 0;
737	anfd->events = events;	807	anfd->events = events;
738		808
739	if (o_events != events || o_reify & EV_IOFDSET)	809	if (o_events != events || o_reify & EV__IOFDSET)
740	backend_modify (EV_A_ fd, o_events, events);	810	backend_modify (EV_A_ fd, o_events, events);
741	}	811	}
742	}	812	}
743		813
744	fdchangecnt = 0;	814	fdchangecnt = 0;
745	}	815	}
746		816
747	void inline_size	817	/* something about the given fd changed */
		818	inline_size void
748	fd_change (EV_P_ int fd, int flags)	819	fd_change (EV_P_ int fd, int flags)
749	{	820	{
750	unsigned char reify = anfds [fd].reify;	821	unsigned char reify = anfds [fd].reify;
751	anfds [fd].reify |= flags;	822	anfds [fd].reify |= flags;
752		823
…		…
756	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	827	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
757	fdchanges [fdchangecnt - 1] = fd;	828	fdchanges [fdchangecnt - 1] = fd;
758	}	829	}
759	}	830	}
760		831
761	void inline_speed	832	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		833	inline_speed void
762	fd_kill (EV_P_ int fd)	834	fd_kill (EV_P_ int fd)
763	{	835	{
764	ev_io *w;	836	ev_io *w;
765		837
766	while ((w = (ev_io *)anfds [fd].head))	838	while ((w = (ev_io *)anfds [fd].head))
…		…
768	ev_io_stop (EV_A_ w);	840	ev_io_stop (EV_A_ w);
769	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	841	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
770	}	842	}
771	}	843	}
772		844
773	int inline_size	845	/* check whether the given fd is atcually valid, for error recovery */
		846	inline_size int
774	fd_valid (int fd)	847	fd_valid (int fd)
775	{	848	{
776	#ifdef _WIN32	849	#ifdef _WIN32
777	return _get_osfhandle (fd) != -1;	850	return _get_osfhandle (fd) != -1;
778	#else	851	#else
…		…
814		887
815	for (fd = 0; fd < anfdmax; ++fd)	888	for (fd = 0; fd < anfdmax; ++fd)
816	if (anfds [fd].events)	889	if (anfds [fd].events)
817	{	890	{
818	anfds [fd].events = 0;	891	anfds [fd].events = 0;
		892	anfds [fd].emask = 0;
819	fd_change (EV_A_ fd, EV_IOFDSET | 1);	893	fd_change (EV_A_ fd, EV__IOFDSET | 1);
820	}	894	}
821	}	895	}
822		896
823	/*****************************************************************************/	897	/*****************************************************************************/
824		898
…		…
840	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	914	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
841	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	915	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
842	#define UPHEAP_DONE(p,k) ((p) == (k))	916	#define UPHEAP_DONE(p,k) ((p) == (k))
843		917
844	/* away from the root */	918	/* away from the root */
845	void inline_speed	919	inline_speed void
846	downheap (ANHE *heap, int N, int k)	920	downheap (ANHE *heap, int N, int k)
847	{	921	{
848	ANHE he = heap [k];	922	ANHE he = heap [k];
849	ANHE *E = heap + N + HEAP0;	923	ANHE *E = heap + N + HEAP0;
850		924
…		…
890	#define HEAP0 1	964	#define HEAP0 1
891	#define HPARENT(k) ((k) >> 1)	965	#define HPARENT(k) ((k) >> 1)
892	#define UPHEAP_DONE(p,k) (!(p))	966	#define UPHEAP_DONE(p,k) (!(p))
893		967
894	/* away from the root */	968	/* away from the root */
895	void inline_speed	969	inline_speed void
896	downheap (ANHE *heap, int N, int k)	970	downheap (ANHE *heap, int N, int k)
897	{	971	{
898	ANHE he = heap [k];	972	ANHE he = heap [k];
899		973
900	for (;;)	974	for (;;)
…		…
920	ev_active (ANHE_w (he)) = k;	994	ev_active (ANHE_w (he)) = k;
921	}	995	}
922	#endif	996	#endif
923		997
924	/* towards the root */	998	/* towards the root */
925	void inline_speed	999	inline_speed void
926	upheap (ANHE *heap, int k)	1000	upheap (ANHE *heap, int k)
927	{	1001	{
928	ANHE he = heap [k];	1002	ANHE he = heap [k];
929		1003
930	for (;;)	1004	for (;;)
…		…
941		1015
942	heap [k] = he;	1016	heap [k] = he;
943	ev_active (ANHE_w (he)) = k;	1017	ev_active (ANHE_w (he)) = k;
944	}	1018	}
945		1019
946	void inline_size	1020	/* move an element suitably so it is in a correct place */
		1021	inline_size void
947	adjustheap (ANHE *heap, int N, int k)	1022	adjustheap (ANHE *heap, int N, int k)
948	{	1023	{
949	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1024	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
950	upheap (heap, k);	1025	upheap (heap, k);
951	else	1026	else
952	downheap (heap, N, k);	1027	downheap (heap, N, k);
953	}	1028	}
954		1029
955	/* rebuild the heap: this function is used only once and executed rarely */	1030	/* rebuild the heap: this function is used only once and executed rarely */
956	void inline_size	1031	inline_size void
957	reheap (ANHE *heap, int N)	1032	reheap (ANHE *heap, int N)
958	{	1033	{
959	int i;	1034	int i;
960		1035
961	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1036	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
964	upheap (heap, i + HEAP0);	1039	upheap (heap, i + HEAP0);
965	}	1040	}
966		1041
967	/*****************************************************************************/	1042	/*****************************************************************************/
968		1043
		1044	/* associate signal watchers to a signal signal */
969	typedef struct	1045	typedef struct
970	{	1046	{
971	WL head;	1047	WL head;
972	EV_ATOMIC_T gotsig;	1048	EV_ATOMIC_T gotsig;
973	} ANSIG;	1049	} ANSIG;
…		…
975	static ANSIG *signals;	1051	static ANSIG *signals;
976	static int signalmax;	1052	static int signalmax;
977		1053
978	static EV_ATOMIC_T gotsig;	1054	static EV_ATOMIC_T gotsig;
979		1055
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	/*****************************************************************************/	1056	/*****************************************************************************/
993		1057
994	void inline_speed	1058	/* used to prepare libev internal fd's */
		1059	/* this is not fork-safe */
		1060	inline_speed void
995	fd_intern (int fd)	1061	fd_intern (int fd)
996	{	1062	{
997	#ifdef _WIN32	1063	#ifdef _WIN32
998	unsigned long arg = 1;	1064	unsigned long arg = 1;
999	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1065	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
1004	}	1070	}
1005		1071
1006	static void noinline	1072	static void noinline
1007	evpipe_init (EV_P)	1073	evpipe_init (EV_P)
1008	{	1074	{
1009	if (!ev_is_active (&pipeev))	1075	if (!ev_is_active (&pipe_w))
1010	{	1076	{
1011	#if EV_USE_EVENTFD	1077	#if EV_USE_EVENTFD
1012	if ((evfd = eventfd (0, 0)) >= 0)	1078	if ((evfd = eventfd (0, 0)) >= 0)
1013	{	1079	{
1014	evpipe [0] = -1;	1080	evpipe [0] = -1;
1015	fd_intern (evfd);	1081	fd_intern (evfd);
1016	ev_io_set (&pipeev, evfd, EV_READ);	1082	ev_io_set (&pipe_w, evfd, EV_READ);
1017	}	1083	}
1018	else	1084	else
1019	#endif	1085	#endif
1020	{	1086	{
1021	while (pipe (evpipe))	1087	while (pipe (evpipe))
1022	syserr ("(libev) error creating signal/async pipe");	1088	ev_syserr ("(libev) error creating signal/async pipe");
1023		1089
1024	fd_intern (evpipe [0]);	1090	fd_intern (evpipe [0]);
1025	fd_intern (evpipe [1]);	1091	fd_intern (evpipe [1]);
1026	ev_io_set (&pipeev, evpipe [0], EV_READ);	1092	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1027	}	1093	}
1028		1094
1029	ev_io_start (EV_A_ &pipeev);	1095	ev_io_start (EV_A_ &pipe_w);
1030	ev_unref (EV_A); /* watcher should not keep loop alive */	1096	ev_unref (EV_A); /* watcher should not keep loop alive */
1031	}	1097	}
1032	}	1098	}
1033		1099
1034	void inline_size	1100	inline_size void
1035	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1101	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1036	{	1102	{
1037	if (!*flag)	1103	if (!*flag)
1038	{	1104	{
1039	int old_errno = errno; /* save errno because write might clobber it */	1105	int old_errno = errno; /* save errno because write might clobber it */
…		…
1052		1118
1053	errno = old_errno;	1119	errno = old_errno;
1054	}	1120	}
1055	}	1121	}
1056		1122
		1123	/* called whenever the libev signal pipe */
		1124	/* got some events (signal, async) */
1057	static void	1125	static void
1058	pipecb (EV_P_ ev_io *iow, int revents)	1126	pipecb (EV_P_ ev_io *iow, int revents)
1059	{	1127	{
1060	#if EV_USE_EVENTFD	1128	#if EV_USE_EVENTFD
1061	if (evfd >= 0)	1129	if (evfd >= 0)
…		…
1117	ev_feed_signal_event (EV_P_ int signum)	1185	ev_feed_signal_event (EV_P_ int signum)
1118	{	1186	{
1119	WL w;	1187	WL w;
1120		1188
1121	#if EV_MULTIPLICITY	1189	#if EV_MULTIPLICITY
1122	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1190	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1123	#endif	1191	#endif
1124		1192
1125	--signum;	1193	--signum;
1126		1194
1127	if (signum < 0 || signum >= signalmax)	1195	if (signum < 0 || signum >= signalmax)
…		…
1143		1211
1144	#ifndef WIFCONTINUED	1212	#ifndef WIFCONTINUED
1145	# define WIFCONTINUED(status) 0	1213	# define WIFCONTINUED(status) 0
1146	#endif	1214	#endif
1147		1215
1148	void inline_speed	1216	/* handle a single child status event */
		1217	inline_speed void
1149	child_reap (EV_P_ int chain, int pid, int status)	1218	child_reap (EV_P_ int chain, int pid, int status)
1150	{	1219	{
1151	ev_child *w;	1220	ev_child *w;
1152	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1221	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1153		1222
…		…
1166		1235
1167	#ifndef WCONTINUED	1236	#ifndef WCONTINUED
1168	# define WCONTINUED 0	1237	# define WCONTINUED 0
1169	#endif	1238	#endif
1170		1239
		1240	/* called on sigchld etc., calls waitpid */
1171	static void	1241	static void
1172	childcb (EV_P_ ev_signal *sw, int revents)	1242	childcb (EV_P_ ev_signal *sw, int revents)
1173	{	1243	{
1174	int pid, status;	1244	int pid, status;
1175		1245
…		…
1256	/* kqueue is borked on everything but netbsd apparently */	1326	/* kqueue is borked on everything but netbsd apparently */
1257	/* it usually doesn't work correctly on anything but sockets and pipes */	1327	/* it usually doesn't work correctly on anything but sockets and pipes */
1258	flags &= ~EVBACKEND_KQUEUE;	1328	flags &= ~EVBACKEND_KQUEUE;
1259	#endif	1329	#endif
1260	#ifdef __APPLE__	1330	#ifdef __APPLE__
1261	// flags &= ~EVBACKEND_KQUEUE; for documentation	1331	/* only select works correctly on that "unix-certified" platform */
1262	flags &= ~EVBACKEND_POLL;	1332	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1333	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1263	#endif	1334	#endif
1264		1335
1265	return flags;	1336	return flags;
1266	}	1337	}
1267		1338
…		…
1299	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1370	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1300	{	1371	{
1301	timeout_blocktime = interval;	1372	timeout_blocktime = interval;
1302	}	1373	}
1303		1374
		1375	/* initialise a loop structure, must be zero-initialised */
1304	static void noinline	1376	static void noinline
1305	loop_init (EV_P_ unsigned int flags)	1377	loop_init (EV_P_ unsigned int flags)
1306	{	1378	{
1307	if (!backend)	1379	if (!backend)
1308	{	1380	{
		1381	#if EV_USE_REALTIME
		1382	if (!have_realtime)
		1383	{
		1384	struct timespec ts;
		1385
		1386	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1387	have_realtime = 1;
		1388	}
		1389	#endif
		1390
1309	#if EV_USE_MONOTONIC	1391	#if EV_USE_MONOTONIC
		1392	if (!have_monotonic)
1310	{	1393	{
1311	struct timespec ts;	1394	struct timespec ts;
		1395
1312	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1396	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1313	have_monotonic = 1;	1397	have_monotonic = 1;
1314	}	1398	}
1315	#endif	1399	#endif
1316		1400
1317	ev_rt_now = ev_time ();	1401	ev_rt_now = ev_time ();
1318	mn_now = get_clock ();	1402	mn_now = get_clock ();
1319	now_floor = mn_now;	1403	now_floor = mn_now;
…		…
1356	#endif	1440	#endif
1357	#if EV_USE_SELECT	1441	#if EV_USE_SELECT
1358	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1442	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1359	#endif	1443	#endif
1360		1444
		1445	ev_prepare_init (&pending_w, pendingcb);
		1446
1361	ev_init (&pipeev, pipecb);	1447	ev_init (&pipe_w, pipecb);
1362	ev_set_priority (&pipeev, EV_MAXPRI);	1448	ev_set_priority (&pipe_w, EV_MAXPRI);
1363	}	1449	}
1364	}	1450	}
1365		1451
		1452	/* free up a loop structure */
1366	static void noinline	1453	static void noinline
1367	loop_destroy (EV_P)	1454	loop_destroy (EV_P)
1368	{	1455	{
1369	int i;	1456	int i;
1370		1457
1371	if (ev_is_active (&pipeev))	1458	if (ev_is_active (&pipe_w))
1372	{	1459	{
1373	ev_ref (EV_A); /* signal watcher */	1460	ev_ref (EV_A); /* signal watcher */
1374	ev_io_stop (EV_A_ &pipeev);	1461	ev_io_stop (EV_A_ &pipe_w);
1375		1462
1376	#if EV_USE_EVENTFD	1463	#if EV_USE_EVENTFD
1377	if (evfd >= 0)	1464	if (evfd >= 0)
1378	close (evfd);	1465	close (evfd);
1379	#endif	1466	#endif
…		…
1418	}	1505	}
1419		1506
1420	ev_free (anfds); anfdmax = 0;	1507	ev_free (anfds); anfdmax = 0;
1421		1508
1422	/* have to use the microsoft-never-gets-it-right macro */	1509	/* have to use the microsoft-never-gets-it-right macro */
		1510	array_free (rfeed, EMPTY);
1423	array_free (fdchange, EMPTY);	1511	array_free (fdchange, EMPTY);
1424	array_free (timer, EMPTY);	1512	array_free (timer, EMPTY);
1425	#if EV_PERIODIC_ENABLE	1513	#if EV_PERIODIC_ENABLE
1426	array_free (periodic, EMPTY);	1514	array_free (periodic, EMPTY);
1427	#endif	1515	#endif
…		…
1436		1524
1437	backend = 0;	1525	backend = 0;
1438	}	1526	}
1439		1527
1440	#if EV_USE_INOTIFY	1528	#if EV_USE_INOTIFY
1441	void inline_size infy_fork (EV_P);	1529	inline_size void infy_fork (EV_P);
1442	#endif	1530	#endif
1443		1531
1444	void inline_size	1532	inline_size void
1445	loop_fork (EV_P)	1533	loop_fork (EV_P)
1446	{	1534	{
1447	#if EV_USE_PORT	1535	#if EV_USE_PORT
1448	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1536	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1449	#endif	1537	#endif
…		…
1455	#endif	1543	#endif
1456	#if EV_USE_INOTIFY	1544	#if EV_USE_INOTIFY
1457	infy_fork (EV_A);	1545	infy_fork (EV_A);
1458	#endif	1546	#endif
1459		1547
1460	if (ev_is_active (&pipeev))	1548	if (ev_is_active (&pipe_w))
1461	{	1549	{
1462	/* this "locks" the handlers against writing to the pipe */	1550	/* this "locks" the handlers against writing to the pipe */
1463	/* while we modify the fd vars */	1551	/* while we modify the fd vars */
1464	gotsig = 1;	1552	gotsig = 1;
1465	#if EV_ASYNC_ENABLE	1553	#if EV_ASYNC_ENABLE
1466	gotasync = 1;	1554	gotasync = 1;
1467	#endif	1555	#endif
1468		1556
1469	ev_ref (EV_A);	1557	ev_ref (EV_A);
1470	ev_io_stop (EV_A_ &pipeev);	1558	ev_io_stop (EV_A_ &pipe_w);
1471		1559
1472	#if EV_USE_EVENTFD	1560	#if EV_USE_EVENTFD
1473	if (evfd >= 0)	1561	if (evfd >= 0)
1474	close (evfd);	1562	close (evfd);
1475	#endif	1563	#endif
…		…
1480	close (evpipe [1]);	1568	close (evpipe [1]);
1481	}	1569	}
1482		1570
1483	evpipe_init (EV_A);	1571	evpipe_init (EV_A);
1484	/* now iterate over everything, in case we missed something */	1572	/* now iterate over everything, in case we missed something */
1485	pipecb (EV_A_ &pipeev, EV_READ);	1573	pipecb (EV_A_ &pipe_w, EV_READ);
1486	}	1574	}
1487		1575
1488	postfork = 0;	1576	postfork = 0;
1489	}	1577	}
1490		1578
…		…
1520		1608
1521	#if EV_VERIFY	1609	#if EV_VERIFY
1522	static void noinline	1610	static void noinline
1523	verify_watcher (EV_P_ W w)	1611	verify_watcher (EV_P_ W w)
1524	{	1612	{
1525	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1613	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1526		1614
1527	if (w->pending)	1615	if (w->pending)
1528	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	1616	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1529	}	1617	}
1530		1618
1531	static void noinline	1619	static void noinline
1532	verify_heap (EV_P_ ANHE *heap, int N)	1620	verify_heap (EV_P_ ANHE *heap, int N)
1533	{	1621	{
1534	int i;	1622	int i;
1535		1623
1536	for (i = HEAP0; i < N + HEAP0; ++i)	1624	for (i = HEAP0; i < N + HEAP0; ++i)
1537	{	1625	{
1538	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));	1626	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])));	1627	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]))));	1628	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1541		1629
1542	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1630	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1543	}	1631	}
1544	}	1632	}
1545		1633
1546	static void noinline	1634	static void noinline
1547	array_verify (EV_P_ W *ws, int cnt)	1635	array_verify (EV_P_ W *ws, int cnt)
1548	{	1636	{
1549	while (cnt--)	1637	while (cnt--)
1550	{	1638	{
1551	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1639	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1552	verify_watcher (EV_A_ ws [cnt]);	1640	verify_watcher (EV_A_ ws [cnt]);
1553	}	1641	}
1554	}	1642	}
1555	#endif	1643	#endif
1556		1644
…		…
1563		1651
1564	assert (activecnt >= -1);	1652	assert (activecnt >= -1);
1565		1653
1566	assert (fdchangemax >= fdchangecnt);	1654	assert (fdchangemax >= fdchangecnt);
1567	for (i = 0; i < fdchangecnt; ++i)	1655	for (i = 0; i < fdchangecnt; ++i)
1568	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1656	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1569		1657
1570	assert (anfdmax >= 0);	1658	assert (anfdmax >= 0);
1571	for (i = 0; i < anfdmax; ++i)	1659	for (i = 0; i < anfdmax; ++i)
1572	for (w = anfds [i].head; w; w = w->next)	1660	for (w = anfds [i].head; w; w = w->next)
1573	{	1661	{
1574	verify_watcher (EV_A_ (W)w);	1662	verify_watcher (EV_A_ (W)w);
1575	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1663	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));	1664	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1577	}	1665	}
1578		1666
1579	assert (timermax >= timercnt);	1667	assert (timermax >= timercnt);
1580	verify_heap (EV_A_ timers, timercnt);	1668	verify_heap (EV_A_ timers, timercnt);
1581		1669
…		…
1658	{	1746	{
1659	#if EV_MULTIPLICITY	1747	#if EV_MULTIPLICITY
1660	struct ev_loop *loop = ev_default_loop_ptr;	1748	struct ev_loop *loop = ev_default_loop_ptr;
1661	#endif	1749	#endif
1662		1750
		1751	ev_default_loop_ptr = 0;
		1752
1663	#ifndef _WIN32	1753	#ifndef _WIN32
1664	ev_ref (EV_A); /* child watcher */	1754	ev_ref (EV_A); /* child watcher */
1665	ev_signal_stop (EV_A_ &childev);	1755	ev_signal_stop (EV_A_ &childev);
1666	#endif	1756	#endif
1667		1757
…		…
1673	{	1763	{
1674	#if EV_MULTIPLICITY	1764	#if EV_MULTIPLICITY
1675	struct ev_loop *loop = ev_default_loop_ptr;	1765	struct ev_loop *loop = ev_default_loop_ptr;
1676	#endif	1766	#endif
1677		1767
1678	if (backend)
1679	postfork = 1; /* must be in line with ev_loop_fork */	1768	postfork = 1; /* must be in line with ev_loop_fork */
1680	}	1769	}
1681		1770
1682	/*****************************************************************************/	1771	/*****************************************************************************/
1683		1772
1684	void	1773	void
1685	ev_invoke (EV_P_ void *w, int revents)	1774	ev_invoke (EV_P_ void *w, int revents)
1686	{	1775	{
1687	EV_CB_INVOKE ((W)w, revents);	1776	EV_CB_INVOKE ((W)w, revents);
1688	}	1777	}
1689		1778
1690	void inline_speed	1779	inline_speed void
1691	call_pending (EV_P)	1780	call_pending (EV_P)
1692	{	1781	{
1693	int pri;	1782	int pri;
1694		1783
1695	for (pri = NUMPRI; pri--; )	1784	for (pri = NUMPRI; pri--; )
1696	while (pendingcnt [pri])	1785	while (pendingcnt [pri])
1697	{	1786	{
1698	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1787	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1699		1788
1700	if (expect_true (p->w))
1701	{
1702	/*assert (("non-pending watcher on pending list", p->w->pending));*/	1789	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1790	/* ^ this is no longer true, as pending_w could be here */
1703		1791
1704	p->w->pending = 0;	1792	p->w->pending = 0;
1705	EV_CB_INVOKE (p->w, p->events);	1793	EV_CB_INVOKE (p->w, p->events);
1706	EV_FREQUENT_CHECK;	1794	EV_FREQUENT_CHECK;
1707	}
1708	}	1795	}
1709	}	1796	}
1710		1797
1711	#if EV_IDLE_ENABLE	1798	#if EV_IDLE_ENABLE
1712	void inline_size	1799	/* make idle watchers pending. this handles the "call-idle */
		1800	/* only when higher priorities are idle" logic */
		1801	inline_size void
1713	idle_reify (EV_P)	1802	idle_reify (EV_P)
1714	{	1803	{
1715	if (expect_false (idleall))	1804	if (expect_false (idleall))
1716	{	1805	{
1717	int pri;	1806	int pri;
…		…
1729	}	1818	}
1730	}	1819	}
1731	}	1820	}
1732	#endif	1821	#endif
1733		1822
1734	void inline_size	1823	/* make timers pending */
		1824	inline_size void
1735	timers_reify (EV_P)	1825	timers_reify (EV_P)
1736	{	1826	{
1737	EV_FREQUENT_CHECK;	1827	EV_FREQUENT_CHECK;
1738		1828
1739	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1829	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1740	{	1830	{
1741	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1831	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	{	1832	{
		1833	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1834
		1835	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1836
		1837	/* first reschedule or stop timer */
		1838	if (w->repeat)
		1839	{
1748	ev_at (w) += w->repeat;	1840	ev_at (w) += w->repeat;
1749	if (ev_at (w) < mn_now)	1841	if (ev_at (w) < mn_now)
1750	ev_at (w) = mn_now;	1842	ev_at (w) = mn_now;
1751		1843
1752	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1844	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1753		1845
1754	ANHE_at_cache (timers [HEAP0]);	1846	ANHE_at_cache (timers [HEAP0]);
1755	downheap (timers, timercnt, HEAP0);	1847	downheap (timers, timercnt, HEAP0);
		1848	}
		1849	else
		1850	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1851
		1852	EV_FREQUENT_CHECK;
		1853	feed_reverse (EV_A_ (W)w);
1756	}	1854	}
1757	else	1855	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1758	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1759		1856
1760	EV_FREQUENT_CHECK;
1761	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1857	feed_reverse_done (EV_A_ EV_TIMEOUT);
1762	}	1858	}
1763	}	1859	}
1764		1860
1765	#if EV_PERIODIC_ENABLE	1861	#if EV_PERIODIC_ENABLE
1766	void inline_size	1862	/* make periodics pending */
		1863	inline_size void
1767	periodics_reify (EV_P)	1864	periodics_reify (EV_P)
1768	{	1865	{
1769	EV_FREQUENT_CHECK;	1866	EV_FREQUENT_CHECK;
1770		1867
1771	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1868	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1772	{	1869	{
1773	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1870	int feed_count = 0;
1774		1871
1775	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1872	do
1776
1777	/* first reschedule or stop timer */
1778	if (w->reschedule_cb)
1779	{	1873	{
		1874	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1875
		1876	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		1877
		1878	/* first reschedule or stop timer */
		1879	if (w->reschedule_cb)
		1880	{
1780	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1881	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1781		1882
1782	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1883	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1783		1884
1784	ANHE_at_cache (periodics [HEAP0]);	1885	ANHE_at_cache (periodics [HEAP0]);
1785	downheap (periodics, periodiccnt, HEAP0);	1886	downheap (periodics, periodiccnt, HEAP0);
		1887	}
		1888	else if (w->interval)
		1889	{
		1890	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1891	/* if next trigger time is not sufficiently in the future, put it there */
		1892	/* this might happen because of floating point inexactness */
		1893	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1894	{
		1895	ev_at (w) += w->interval;
		1896
		1897	/* if interval is unreasonably low we might still have a time in the past */
		1898	/* so correct this. this will make the periodic very inexact, but the user */
		1899	/* has effectively asked to get triggered more often than possible */
		1900	if (ev_at (w) < ev_rt_now)
		1901	ev_at (w) = ev_rt_now;
		1902	}
		1903
		1904	ANHE_at_cache (periodics [HEAP0]);
		1905	downheap (periodics, periodiccnt, HEAP0);
		1906	}
		1907	else
		1908	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1909
		1910	EV_FREQUENT_CHECK;
		1911	feed_reverse (EV_A_ (W)w);
1786	}	1912	}
1787	else if (w->interval)	1913	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		1914
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);	1915	feed_reverse_done (EV_A_ EV_PERIODIC);
1811	}	1916	}
1812	}	1917	}
1813		1918
		1919	/* simply recalculate all periodics */
		1920	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1814	static void noinline	1921	static void noinline
1815	periodics_reschedule (EV_P)	1922	periodics_reschedule (EV_P)
1816	{	1923	{
1817	int i;	1924	int i;
1818		1925
…		…
1831		1938
1832	reheap (periodics, periodiccnt);	1939	reheap (periodics, periodiccnt);
1833	}	1940	}
1834	#endif	1941	#endif
1835		1942
1836	void inline_speed	1943	/* adjust all timers by a given offset */
		1944	static void noinline
		1945	timers_reschedule (EV_P_ ev_tstamp adjust)
		1946	{
		1947	int i;
		1948
		1949	for (i = 0; i < timercnt; ++i)
		1950	{
		1951	ANHE *he = timers + i + HEAP0;
		1952	ANHE_w (*he)->at += adjust;
		1953	ANHE_at_cache (*he);
		1954	}
		1955	}
		1956
		1957	/* fetch new monotonic and realtime times from the kernel */
		1958	/* also detetc if there was a timejump, and act accordingly */
		1959	inline_speed void
1837	time_update (EV_P_ ev_tstamp max_block)	1960	time_update (EV_P_ ev_tstamp max_block)
1838	{	1961	{
1839	int i;
1840
1841	#if EV_USE_MONOTONIC	1962	#if EV_USE_MONOTONIC
1842	if (expect_true (have_monotonic))	1963	if (expect_true (have_monotonic))
1843	{	1964	{
		1965	int i;
1844	ev_tstamp odiff = rtmn_diff;	1966	ev_tstamp odiff = rtmn_diff;
1845		1967
1846	mn_now = get_clock ();	1968	mn_now = get_clock ();
1847		1969
1848	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1970	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1874	ev_rt_now = ev_time ();	1996	ev_rt_now = ev_time ();
1875	mn_now = get_clock ();	1997	mn_now = get_clock ();
1876	now_floor = mn_now;	1998	now_floor = mn_now;
1877	}	1999	}
1878		2000
		2001	/* no timer adjustment, as the monotonic clock doesn't jump */
		2002	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1879	# if EV_PERIODIC_ENABLE	2003	# if EV_PERIODIC_ENABLE
1880	periodics_reschedule (EV_A);	2004	periodics_reschedule (EV_A);
1881	# endif	2005	# endif
1882	/* no timer adjustment, as the monotonic clock doesn't jump */
1883	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1884	}	2006	}
1885	else	2007	else
1886	#endif	2008	#endif
1887	{	2009	{
1888	ev_rt_now = ev_time ();	2010	ev_rt_now = ev_time ();
1889		2011
1890	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2012	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1891	{	2013	{
		2014	/* adjust timers. this is easy, as the offset is the same for all of them */
		2015	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1892	#if EV_PERIODIC_ENABLE	2016	#if EV_PERIODIC_ENABLE
1893	periodics_reschedule (EV_A);	2017	periodics_reschedule (EV_A);
1894	#endif	2018	#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	}	2019	}
1903		2020
1904	mn_now = ev_rt_now;	2021	mn_now = ev_rt_now;
1905	}	2022	}
1906	}
1907
1908	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	}	2023	}
1925		2024
1926	static int loop_done;	2025	static int loop_done;
1927		2026
1928	void	2027	void
…		…
1962	{	2061	{
1963	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2062	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1964	call_pending (EV_A);	2063	call_pending (EV_A);
1965	}	2064	}
1966		2065
1967	if (expect_false (!activecnt))
1968	break;
1969
1970	/* we might have forked, so reify kernel state if necessary */	2066	/* we might have forked, so reify kernel state if necessary */
1971	if (expect_false (postfork))	2067	if (expect_false (postfork))
1972	loop_fork (EV_A);	2068	loop_fork (EV_A);
1973		2069
1974	/* update fd-related kernel structures */	2070	/* update fd-related kernel structures */
…		…
1979	ev_tstamp waittime = 0.;	2075	ev_tstamp waittime = 0.;
1980	ev_tstamp sleeptime = 0.;	2076	ev_tstamp sleeptime = 0.;
1981		2077
1982	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2078	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1983	{	2079	{
		2080	/* remember old timestamp for io_blocktime calculation */
		2081	ev_tstamp prev_mn_now = mn_now;
		2082
1984	/* update time to cancel out callback processing overhead */	2083	/* update time to cancel out callback processing overhead */
1985	time_update (EV_A_ 1e100);	2084	time_update (EV_A_ 1e100);
1986		2085
1987	waittime = MAX_BLOCKTIME;	2086	waittime = MAX_BLOCKTIME;
1988		2087
…		…
1998	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2097	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1999	if (waittime > to) waittime = to;	2098	if (waittime > to) waittime = to;
2000	}	2099	}
2001	#endif	2100	#endif
2002		2101
		2102	/* don't let timeouts decrease the waittime below timeout_blocktime */
2003	if (expect_false (waittime < timeout_blocktime))	2103	if (expect_false (waittime < timeout_blocktime))
2004	waittime = timeout_blocktime;	2104	waittime = timeout_blocktime;
2005		2105
2006	sleeptime = waittime - backend_fudge;	2106	/* extra check because io_blocktime is commonly 0 */
2007
2008	if (expect_true (sleeptime > io_blocktime))	2107	if (expect_false (io_blocktime))
2009	sleeptime = io_blocktime;
2010
2011	if (sleeptime)
2012	{	2108	{
		2109	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2110
		2111	if (sleeptime > waittime - backend_fudge)
		2112	sleeptime = waittime - backend_fudge;
		2113
		2114	if (expect_true (sleeptime > 0.))
		2115	{
2013	ev_sleep (sleeptime);	2116	ev_sleep (sleeptime);
2014	waittime -= sleeptime;	2117	waittime -= sleeptime;
		2118	}
2015	}	2119	}
2016	}	2120	}
2017		2121
2018	++loop_count;	2122	++loop_count;
2019	backend_poll (EV_A_ waittime);	2123	backend_poll (EV_A_ waittime);
…		…
2053	ev_unloop (EV_P_ int how)	2157	ev_unloop (EV_P_ int how)
2054	{	2158	{
2055	loop_done = how;	2159	loop_done = how;
2056	}	2160	}
2057		2161
		2162	void
		2163	ev_ref (EV_P)
		2164	{
		2165	++activecnt;
		2166	}
		2167
		2168	void
		2169	ev_unref (EV_P)
		2170	{
		2171	--activecnt;
		2172	}
		2173
		2174	void
		2175	ev_now_update (EV_P)
		2176	{
		2177	time_update (EV_A_ 1e100);
		2178	}
		2179
		2180	void
		2181	ev_suspend (EV_P)
		2182	{
		2183	ev_now_update (EV_A);
		2184	}
		2185
		2186	void
		2187	ev_resume (EV_P)
		2188	{
		2189	ev_tstamp mn_prev = mn_now;
		2190
		2191	ev_now_update (EV_A);
		2192	timers_reschedule (EV_A_ mn_now - mn_prev);
		2193	#if EV_PERIODIC_ENABLE
		2194	/* TODO: really do this? */
		2195	periodics_reschedule (EV_A);
		2196	#endif
		2197	}
		2198
2058	/*****************************************************************************/	2199	/*****************************************************************************/
		2200	/* singly-linked list management, used when the expected list length is short */
2059		2201
2060	void inline_size	2202	inline_size void
2061	wlist_add (WL *head, WL elem)	2203	wlist_add (WL *head, WL elem)
2062	{	2204	{
2063	elem->next = *head;	2205	elem->next = *head;
2064	*head = elem;	2206	*head = elem;
2065	}	2207	}
2066		2208
2067	void inline_size	2209	inline_size void
2068	wlist_del (WL *head, WL elem)	2210	wlist_del (WL *head, WL elem)
2069	{	2211	{
2070	while (*head)	2212	while (*head)
2071	{	2213	{
2072	if (*head == elem)	2214	if (*head == elem)
…		…
2077		2219
2078	head = &(*head)->next;	2220	head = &(*head)->next;
2079	}	2221	}
2080	}	2222	}
2081		2223
2082	void inline_speed	2224	/* internal, faster, version of ev_clear_pending */
		2225	inline_speed void
2083	clear_pending (EV_P_ W w)	2226	clear_pending (EV_P_ W w)
2084	{	2227	{
2085	if (w->pending)	2228	if (w->pending)
2086	{	2229	{
2087	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2230	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2088	w->pending = 0;	2231	w->pending = 0;
2089	}	2232	}
2090	}	2233	}
2091		2234
2092	int	2235	int
…		…
2096	int pending = w_->pending;	2239	int pending = w_->pending;
2097		2240
2098	if (expect_true (pending))	2241	if (expect_true (pending))
2099	{	2242	{
2100	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2243	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2244	p->w = (W)&pending_w;
2101	w_->pending = 0;	2245	w_->pending = 0;
2102	p->w = 0;
2103	return p->events;	2246	return p->events;
2104	}	2247	}
2105	else	2248	else
2106	return 0;	2249	return 0;
2107	}	2250	}
2108		2251
2109	void inline_size	2252	inline_size void
2110	pri_adjust (EV_P_ W w)	2253	pri_adjust (EV_P_ W w)
2111	{	2254	{
2112	int pri = w->priority;	2255	int pri = w->priority;
2113	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2256	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2114	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2257	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2115	w->priority = pri;	2258	w->priority = pri;
2116	}	2259	}
2117		2260
2118	void inline_speed	2261	inline_speed void
2119	ev_start (EV_P_ W w, int active)	2262	ev_start (EV_P_ W w, int active)
2120	{	2263	{
2121	pri_adjust (EV_A_ w);	2264	pri_adjust (EV_A_ w);
2122	w->active = active;	2265	w->active = active;
2123	ev_ref (EV_A);	2266	ev_ref (EV_A);
2124	}	2267	}
2125		2268
2126	void inline_size	2269	inline_size void
2127	ev_stop (EV_P_ W w)	2270	ev_stop (EV_P_ W w)
2128	{	2271	{
2129	ev_unref (EV_A);	2272	ev_unref (EV_A);
2130	w->active = 0;	2273	w->active = 0;
2131	}	2274	}
…		…
2138	int fd = w->fd;	2281	int fd = w->fd;
2139		2282
2140	if (expect_false (ev_is_active (w)))	2283	if (expect_false (ev_is_active (w)))
2141	return;	2284	return;
2142		2285
2143	assert (("ev_io_start called with negative fd", fd >= 0));	2286	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2287	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2144		2288
2145	EV_FREQUENT_CHECK;	2289	EV_FREQUENT_CHECK;
2146		2290
2147	ev_start (EV_A_ (W)w, 1);	2291	ev_start (EV_A_ (W)w, 1);
2148	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2292	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2149	wlist_add (&anfds[fd].head, (WL)w);	2293	wlist_add (&anfds[fd].head, (WL)w);
2150		2294
2151	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2295	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2152	w->events &= ~EV_IOFDSET;	2296	w->events &= ~EV__IOFDSET;
2153		2297
2154	EV_FREQUENT_CHECK;	2298	EV_FREQUENT_CHECK;
2155	}	2299	}
2156		2300
2157	void noinline	2301	void noinline
…		…
2159	{	2303	{
2160	clear_pending (EV_A_ (W)w);	2304	clear_pending (EV_A_ (W)w);
2161	if (expect_false (!ev_is_active (w)))	2305	if (expect_false (!ev_is_active (w)))
2162	return;	2306	return;
2163		2307
2164	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2308	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2165		2309
2166	EV_FREQUENT_CHECK;	2310	EV_FREQUENT_CHECK;
2167		2311
2168	wlist_del (&anfds[w->fd].head, (WL)w);	2312	wlist_del (&anfds[w->fd].head, (WL)w);
2169	ev_stop (EV_A_ (W)w);	2313	ev_stop (EV_A_ (W)w);
…		…
2179	if (expect_false (ev_is_active (w)))	2323	if (expect_false (ev_is_active (w)))
2180	return;	2324	return;
2181		2325
2182	ev_at (w) += mn_now;	2326	ev_at (w) += mn_now;
2183		2327
2184	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2328	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2185		2329
2186	EV_FREQUENT_CHECK;	2330	EV_FREQUENT_CHECK;
2187		2331
2188	++timercnt;	2332	++timercnt;
2189	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2333	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2192	ANHE_at_cache (timers [ev_active (w)]);	2336	ANHE_at_cache (timers [ev_active (w)]);
2193	upheap (timers, ev_active (w));	2337	upheap (timers, ev_active (w));
2194		2338
2195	EV_FREQUENT_CHECK;	2339	EV_FREQUENT_CHECK;
2196		2340
2197	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2341	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2198	}	2342	}
2199		2343
2200	void noinline	2344	void noinline
2201	ev_timer_stop (EV_P_ ev_timer *w)	2345	ev_timer_stop (EV_P_ ev_timer *w)
2202	{	2346	{
…		…
2207	EV_FREQUENT_CHECK;	2351	EV_FREQUENT_CHECK;
2208		2352
2209	{	2353	{
2210	int active = ev_active (w);	2354	int active = ev_active (w);
2211		2355
2212	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2356	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2213		2357
2214	--timercnt;	2358	--timercnt;
2215		2359
2216	if (expect_true (active < timercnt + HEAP0))	2360	if (expect_true (active < timercnt + HEAP0))
2217	{	2361	{
…		…
2261		2405
2262	if (w->reschedule_cb)	2406	if (w->reschedule_cb)
2263	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2407	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2264	else if (w->interval)	2408	else if (w->interval)
2265	{	2409	{
2266	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2410	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 */	2411	/* 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;	2412	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2269	}	2413	}
2270	else	2414	else
2271	ev_at (w) = w->offset;	2415	ev_at (w) = w->offset;
…		…
2279	ANHE_at_cache (periodics [ev_active (w)]);	2423	ANHE_at_cache (periodics [ev_active (w)]);
2280	upheap (periodics, ev_active (w));	2424	upheap (periodics, ev_active (w));
2281		2425
2282	EV_FREQUENT_CHECK;	2426	EV_FREQUENT_CHECK;
2283		2427
2284	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2428	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2285	}	2429	}
2286		2430
2287	void noinline	2431	void noinline
2288	ev_periodic_stop (EV_P_ ev_periodic *w)	2432	ev_periodic_stop (EV_P_ ev_periodic *w)
2289	{	2433	{
…		…
2294	EV_FREQUENT_CHECK;	2438	EV_FREQUENT_CHECK;
2295		2439
2296	{	2440	{
2297	int active = ev_active (w);	2441	int active = ev_active (w);
2298		2442
2299	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2443	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2300		2444
2301	--periodiccnt;	2445	--periodiccnt;
2302		2446
2303	if (expect_true (active < periodiccnt + HEAP0))	2447	if (expect_true (active < periodiccnt + HEAP0))
2304	{	2448	{
…		…
2327		2471
2328	void noinline	2472	void noinline
2329	ev_signal_start (EV_P_ ev_signal *w)	2473	ev_signal_start (EV_P_ ev_signal *w)
2330	{	2474	{
2331	#if EV_MULTIPLICITY	2475	#if EV_MULTIPLICITY
2332	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2476	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2333	#endif	2477	#endif
2334	if (expect_false (ev_is_active (w)))	2478	if (expect_false (ev_is_active (w)))
2335	return;	2479	return;
2336		2480
2337	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2481	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2338		2482
2339	evpipe_init (EV_A);	2483	evpipe_init (EV_A);
2340		2484
2341	EV_FREQUENT_CHECK;	2485	EV_FREQUENT_CHECK;
2342		2486
…		…
2345	sigset_t full, prev;	2489	sigset_t full, prev;
2346	sigfillset (&full);	2490	sigfillset (&full);
2347	sigprocmask (SIG_SETMASK, &full, &prev);	2491	sigprocmask (SIG_SETMASK, &full, &prev);
2348	#endif	2492	#endif
2349		2493
2350	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2494	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2351		2495
2352	#ifndef _WIN32	2496	#ifndef _WIN32
2353	sigprocmask (SIG_SETMASK, &prev, 0);	2497	sigprocmask (SIG_SETMASK, &prev, 0);
2354	#endif	2498	#endif
2355	}	2499	}
…		…
2393		2537
2394	void	2538	void
2395	ev_child_start (EV_P_ ev_child *w)	2539	ev_child_start (EV_P_ ev_child *w)
2396	{	2540	{
2397	#if EV_MULTIPLICITY	2541	#if EV_MULTIPLICITY
2398	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2542	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2399	#endif	2543	#endif
2400	if (expect_false (ev_is_active (w)))	2544	if (expect_false (ev_is_active (w)))
2401	return;	2545	return;
2402		2546
2403	EV_FREQUENT_CHECK;	2547	EV_FREQUENT_CHECK;
…		…
2428	# ifdef _WIN32	2572	# ifdef _WIN32
2429	# undef lstat	2573	# undef lstat
2430	# define lstat(a,b) _stati64 (a,b)	2574	# define lstat(a,b) _stati64 (a,b)
2431	# endif	2575	# endif
2432		2576
2433	#define DEF_STAT_INTERVAL 5.0074891	2577	#define DEF_STAT_INTERVAL 5.0074891
		2578	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2434	#define MIN_STAT_INTERVAL 0.1074891	2579	#define MIN_STAT_INTERVAL 0.1074891
2435		2580
2436	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2581	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2437		2582
2438	#if EV_USE_INOTIFY	2583	#if EV_USE_INOTIFY
2439	# define EV_INOTIFY_BUFSIZE 8192	2584	# define EV_INOTIFY_BUFSIZE 8192
…		…
2443	{	2588	{
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);	2589	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		2590
2446	if (w->wd < 0)	2591	if (w->wd < 0)
2447	{	2592	{
		2593	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 */	2594	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2449		2595
2450	/* monitor some parent directory for speedup hints */	2596	/* monitor some parent directory for speedup hints */
2451	/* note that exceeding the hardcoded limit is not a correctness issue, */	2597	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2452	/* but an efficiency issue only */	2598	/* but an efficiency issue only */
2453	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2599	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2454	{	2600	{
2455	char path [4096];	2601	char path [4096];
2456	strcpy (path, w->path);	2602	strcpy (path, w->path);
…		…
2460	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2606	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2461	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2607	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2462		2608
2463	char *pend = strrchr (path, '/');	2609	char *pend = strrchr (path, '/');
2464		2610
2465	if (!pend)	2611	if (!pend || pend == path)
2466	break; /* whoops, no '/', complain to your admin */	2612	break;
2467		2613
2468	*pend = 0;	2614	*pend = 0;
2469	w->wd = inotify_add_watch (fs_fd, path, mask);	2615	w->wd = inotify_add_watch (fs_fd, path, mask);
2470	}	2616	}
2471	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2617	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2472	}	2618	}
2473	}	2619	}
2474	else
2475	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2476		2620
2477	if (w->wd >= 0)	2621	if (w->wd >= 0)
		2622	{
2478	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2623	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2624
		2625	/* now local changes will be tracked by inotify, but remote changes won't */
		2626	/* unless the filesystem it known to be local, we therefore still poll */
		2627	/* also do poll on <2.6.25, but with normal frequency */
		2628	struct statfs sfs;
		2629
		2630	if (fs_2625 && !statfs (w->path, &sfs))
		2631	if (sfs.f_type == 0x1373 /* devfs */
		2632	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2633	|| sfs.f_type == 0x3153464a /* jfs */
		2634	|| sfs.f_type == 0x52654973 /* reiser3 */
		2635	|| sfs.f_type == 0x01021994 /* tempfs */
		2636	|| sfs.f_type == 0x58465342 /* xfs */)
		2637	return;
		2638
		2639	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2640	ev_timer_again (EV_A_ &w->timer);
		2641	}
2479	}	2642	}
2480		2643
2481	static void noinline	2644	static void noinline
2482	infy_del (EV_P_ ev_stat *w)	2645	infy_del (EV_P_ ev_stat *w)
2483	{	2646	{
…		…
2513		2676
2514	if (w->wd == wd || wd == -1)	2677	if (w->wd == wd || wd == -1)
2515	{	2678	{
2516	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2679	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2517	{	2680	{
		2681	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2518	w->wd = -1;	2682	w->wd = -1;
2519	infy_add (EV_A_ w); /* re-add, no matter what */	2683	infy_add (EV_A_ w); /* re-add, no matter what */
2520	}	2684	}
2521		2685
2522	stat_timer_cb (EV_A_ &w->timer, 0);	2686	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2535		2699
2536	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2700	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2537	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2701	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2538	}	2702	}
2539		2703
2540	void inline_size	2704	inline_size void
2541	infy_init (EV_P)	2705	check_2625 (EV_P)
2542	{	2706	{
2543	if (fs_fd != -2)
2544	return;
2545
2546	/* kernels < 2.6.25 are borked	2707	/* kernels < 2.6.25 are borked
2547	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2708	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2548	*/	2709	*/
2549	{
2550	struct utsname buf;	2710	struct utsname buf;
2551	int major, minor, micro;	2711	int major, minor, micro;
2552		2712
2553	fs_fd = -1;
2554
2555	if (uname (&buf))	2713	if (uname (&buf))
2556	return;	2714	return;
2557		2715
2558	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2716	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2559	return;	2717	return;
2560		2718
2561	if (major < 2	2719	if (major < 2
2562	|| (major == 2 && minor < 6)	2720	|| (major == 2 && minor < 6)
2563	|| (major == 2 && minor == 6 && micro < 25))	2721	|| (major == 2 && minor == 6 && micro < 25))
2564	return;	2722	return;
2565	}	2723
		2724	fs_2625 = 1;
		2725	}
		2726
		2727	inline_size void
		2728	infy_init (EV_P)
		2729	{
		2730	if (fs_fd != -2)
		2731	return;
		2732
		2733	fs_fd = -1;
		2734
		2735	check_2625 (EV_A);
2566		2736
2567	fs_fd = inotify_init ();	2737	fs_fd = inotify_init ();
2568		2738
2569	if (fs_fd >= 0)	2739	if (fs_fd >= 0)
2570	{	2740	{
…		…
2572	ev_set_priority (&fs_w, EV_MAXPRI);	2742	ev_set_priority (&fs_w, EV_MAXPRI);
2573	ev_io_start (EV_A_ &fs_w);	2743	ev_io_start (EV_A_ &fs_w);
2574	}	2744	}
2575	}	2745	}
2576		2746
2577	void inline_size	2747	inline_size void
2578	infy_fork (EV_P)	2748	infy_fork (EV_P)
2579	{	2749	{
2580	int slot;	2750	int slot;
2581		2751
2582	if (fs_fd < 0)	2752	if (fs_fd < 0)
…		…
2598	w->wd = -1;	2768	w->wd = -1;
2599		2769
2600	if (fs_fd >= 0)	2770	if (fs_fd >= 0)
2601	infy_add (EV_A_ w); /* re-add, no matter what */	2771	infy_add (EV_A_ w); /* re-add, no matter what */
2602	else	2772	else
2603	ev_timer_start (EV_A_ &w->timer);	2773	ev_timer_again (EV_A_ &w->timer);
2604	}	2774	}
2605	}	2775	}
2606	}	2776	}
2607		2777
2608	#endif	2778	#endif
…		…
2663	ev_stat_start (EV_P_ ev_stat *w)	2833	ev_stat_start (EV_P_ ev_stat *w)
2664	{	2834	{
2665	if (expect_false (ev_is_active (w)))	2835	if (expect_false (ev_is_active (w)))
2666	return;	2836	return;
2667		2837
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);	2838	ev_stat_stat (EV_A_ w);
2673		2839
		2840	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2674	if (w->interval < MIN_STAT_INTERVAL)	2841	w->interval = MIN_STAT_INTERVAL;
2675	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2676		2842
2677	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2843	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));	2844	ev_set_priority (&w->timer, ev_priority (w));
2679		2845
2680	#if EV_USE_INOTIFY	2846	#if EV_USE_INOTIFY
2681	infy_init (EV_A);	2847	infy_init (EV_A);
2682		2848
2683	if (fs_fd >= 0)	2849	if (fs_fd >= 0)
2684	infy_add (EV_A_ w);	2850	infy_add (EV_A_ w);
2685	else	2851	else
2686	#endif	2852	#endif
2687	ev_timer_start (EV_A_ &w->timer);	2853	ev_timer_again (EV_A_ &w->timer);
2688		2854
2689	ev_start (EV_A_ (W)w, 1);	2855	ev_start (EV_A_ (W)w, 1);
2690		2856
2691	EV_FREQUENT_CHECK;	2857	EV_FREQUENT_CHECK;
2692	}	2858	}
…		…
2867	static void	3033	static void
2868	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3034	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2869	{	3035	{
2870	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3036	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2871		3037
		3038	ev_embed_stop (EV_A_ w);
		3039
2872	{	3040	{
2873	struct ev_loop *loop = w->other;	3041	struct ev_loop *loop = w->other;
2874		3042
2875	ev_loop_fork (EV_A);	3043	ev_loop_fork (EV_A);
		3044	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2876	}	3045	}
		3046
		3047	ev_embed_start (EV_A_ w);
2877	}	3048	}
2878		3049
2879	#if 0	3050	#if 0
2880	static void	3051	static void
2881	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3052	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2890	if (expect_false (ev_is_active (w)))	3061	if (expect_false (ev_is_active (w)))
2891	return;	3062	return;
2892		3063
2893	{	3064	{
2894	struct ev_loop *loop = w->other;	3065	struct ev_loop *loop = w->other;
2895	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3066	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);	3067	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2897	}	3068	}
2898		3069
2899	EV_FREQUENT_CHECK;	3070	EV_FREQUENT_CHECK;
2900		3071
…		…
3083	ev_timer_set (&once->to, timeout, 0.);	3254	ev_timer_set (&once->to, timeout, 0.);
3084	ev_timer_start (EV_A_ &once->to);	3255	ev_timer_start (EV_A_ &once->to);
3085	}	3256	}
3086	}	3257	}
3087		3258
		3259	/*****************************************************************************/
		3260
		3261	#if EV_WALK_ENABLE
		3262	void
		3263	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3264	{
		3265	int i, j;
		3266	ev_watcher_list *wl, *wn;
		3267
		3268	if (types & (EV_IO | EV_EMBED))
		3269	for (i = 0; i < anfdmax; ++i)
		3270	for (wl = anfds [i].head; wl; )
		3271	{
		3272	wn = wl->next;
		3273
		3274	#if EV_EMBED_ENABLE
		3275	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3276	{
		3277	if (types & EV_EMBED)
		3278	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3279	}
		3280	else
		3281	#endif
		3282	#if EV_USE_INOTIFY
		3283	if (ev_cb ((ev_io *)wl) == infy_cb)
		3284	;
		3285	else
		3286	#endif
		3287	if ((ev_io *)wl != &pipe_w)
		3288	if (types & EV_IO)
		3289	cb (EV_A_ EV_IO, wl);
		3290
		3291	wl = wn;
		3292	}
		3293
		3294	if (types & (EV_TIMER | EV_STAT))
		3295	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3296	#if EV_STAT_ENABLE
		3297	/*TODO: timer is not always active*/
		3298	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3299	{
		3300	if (types & EV_STAT)
		3301	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3302	}
		3303	else
		3304	#endif
		3305	if (types & EV_TIMER)
		3306	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3307
		3308	#if EV_PERIODIC_ENABLE
		3309	if (types & EV_PERIODIC)
		3310	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3311	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3312	#endif
		3313
		3314	#if EV_IDLE_ENABLE
		3315	if (types & EV_IDLE)
		3316	for (j = NUMPRI; i--; )
		3317	for (i = idlecnt [j]; i--; )
		3318	cb (EV_A_ EV_IDLE, idles [j][i]);
		3319	#endif
		3320
		3321	#if EV_FORK_ENABLE
		3322	if (types & EV_FORK)
		3323	for (i = forkcnt; i--; )
		3324	if (ev_cb (forks [i]) != embed_fork_cb)
		3325	cb (EV_A_ EV_FORK, forks [i]);
		3326	#endif
		3327
		3328	#if EV_ASYNC_ENABLE
		3329	if (types & EV_ASYNC)
		3330	for (i = asynccnt; i--; )
		3331	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3332	#endif
		3333
		3334	if (types & EV_PREPARE)
		3335	for (i = preparecnt; i--; )
		3336	#if EV_EMBED_ENABLE
		3337	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3338	#endif
		3339	cb (EV_A_ EV_PREPARE, prepares [i]);
		3340
		3341	if (types & EV_CHECK)
		3342	for (i = checkcnt; i--; )
		3343	cb (EV_A_ EV_CHECK, checks [i]);
		3344
		3345	if (types & EV_SIGNAL)
		3346	for (i = 0; i < signalmax; ++i)
		3347	for (wl = signals [i].head; wl; )
		3348	{
		3349	wn = wl->next;
		3350	cb (EV_A_ EV_SIGNAL, wl);
		3351	wl = wn;
		3352	}
		3353
		3354	if (types & EV_CHILD)
		3355	for (i = EV_PID_HASHSIZE; i--; )
		3356	for (wl = childs [i]; wl; )
		3357	{
		3358	wn = wl->next;
		3359	cb (EV_A_ EV_CHILD, wl);
		3360	wl = wn;
		3361	}
		3362	/* EV_STAT 0x00001000 /* stat data changed */
		3363	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3364	}
		3365	#endif
		3366
3088	#if EV_MULTIPLICITY	3367	#if EV_MULTIPLICITY
3089	#include "ev_wrap.h"	3368	#include "ev_wrap.h"
3090	#endif	3369	#endif
3091		3370
3092	#ifdef __cplusplus	3371	#ifdef __cplusplus

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