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Comparing libev/ev.c (file contents):
Revision 1.259 by root, Mon Sep 8 13:14:23 2008 UTC vs.
Revision 1.291 by root, Mon Jun 29 04:44:18 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
…		…
286	# include <sys/select.h>	322	# include <sys/select.h>
287	# endif	323	# endif
288	#endif	324	#endif
289		325
290	#if EV_USE_INOTIFY	326	#if EV_USE_INOTIFY
		327	# include <sys/utsname.h>
		328	# include <sys/statfs.h>
291	# include <sys/inotify.h>	329	# include <sys/inotify.h>
		330	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		331	# ifndef IN_DONT_FOLLOW
		332	# undef EV_USE_INOTIFY
		333	# define EV_USE_INOTIFY 0
		334	# endif
292	#endif	335	#endif
293		336
294	#if EV_SELECT_IS_WINSOCKET	337	#if EV_SELECT_IS_WINSOCKET
295	# include <winsock.h>	338	# include <winsock.h>
296	#endif	339	#endif
…		…
361	typedef ev_watcher_time *WT;	404	typedef ev_watcher_time *WT;
362		405
363	#define ev_active(w) ((W)(w))->active	406	#define ev_active(w) ((W)(w))->active
364	#define ev_at(w) ((WT)(w))->at	407	#define ev_at(w) ((WT)(w))->at
365		408
366	#if EV_USE_MONOTONIC	409	#if EV_USE_REALTIME
367	/* 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 */
368	/* 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
369	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? */
370	#endif	417	#endif
371		418
372	#ifdef _WIN32	419	#ifdef _WIN32
373	# include "ev_win32.c"	420	# include "ev_win32.c"
…		…
382	{	429	{
383	syserr_cb = cb;	430	syserr_cb = cb;
384	}	431	}
385		432
386	static void noinline	433	static void noinline
387	syserr (const char *msg)	434	ev_syserr (const char *msg)
388	{	435	{
389	if (!msg)	436	if (!msg)
390	msg = "(libev) system error";	437	msg = "(libev) system error";
391		438
392	if (syserr_cb)	439	if (syserr_cb)
…		…
438	#define ev_malloc(size) ev_realloc (0, (size))	485	#define ev_malloc(size) ev_realloc (0, (size))
439	#define ev_free(ptr) ev_realloc ((ptr), 0)	486	#define ev_free(ptr) ev_realloc ((ptr), 0)
440		487
441	/*****************************************************************************/	488	/*****************************************************************************/
442		489
		490	/* file descriptor info structure */
443	typedef struct	491	typedef struct
444	{	492	{
445	WL head;	493	WL head;
446	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 */
447	unsigned char reify;	497	unsigned char unused;
		498	#if EV_USE_EPOLL
		499	unsigned int egen; /* generation counter to counter epoll bugs */
		500	#endif
448	#if EV_SELECT_IS_WINSOCKET	501	#if EV_SELECT_IS_WINSOCKET
449	SOCKET handle;	502	SOCKET handle;
450	#endif	503	#endif
451	} ANFD;	504	} ANFD;
452		505
		506	/* stores the pending event set for a given watcher */
453	typedef struct	507	typedef struct
454	{	508	{
455	W w;	509	W w;
456	int events;	510	int events; /* the pending event set for the given watcher */
457	} ANPENDING;	511	} ANPENDING;
458		512
459	#if EV_USE_INOTIFY	513	#if EV_USE_INOTIFY
460	/* hash table entry per inotify-id */	514	/* hash table entry per inotify-id */
461	typedef struct	515	typedef struct
…		…
464	} ANFS;	518	} ANFS;
465	#endif	519	#endif
466		520
467	/* Heap Entry */	521	/* Heap Entry */
468	#if EV_HEAP_CACHE_AT	522	#if EV_HEAP_CACHE_AT
		523	/* a heap element */
469	typedef struct {	524	typedef struct {
470	ev_tstamp at;	525	ev_tstamp at;
471	WT w;	526	WT w;
472	} ANHE;	527	} ANHE;
473		528
474	#define ANHE_w(he) (he).w /* access watcher, read-write */	529	#define ANHE_w(he) (he).w /* access watcher, read-write */
475	#define ANHE_at(he) (he).at /* access cached at, read-only */	530	#define ANHE_at(he) (he).at /* access cached at, read-only */
476	#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 */
477	#else	532	#else
		533	/* a heap element */
478	typedef WT ANHE;	534	typedef WT ANHE;
479		535
480	#define ANHE_w(he) (he)	536	#define ANHE_w(he) (he)
481	#define ANHE_at(he) (he)->at	537	#define ANHE_at(he) (he)->at
482	#define ANHE_at_cache(he)	538	#define ANHE_at_cache(he)
…		…
512		568
513	ev_tstamp	569	ev_tstamp
514	ev_time (void)	570	ev_time (void)
515	{	571	{
516	#if EV_USE_REALTIME	572	#if EV_USE_REALTIME
		573	if (expect_true (have_realtime))
		574	{
517	struct timespec ts;	575	struct timespec ts;
518	clock_gettime (CLOCK_REALTIME, &ts);	576	clock_gettime (CLOCK_REALTIME, &ts);
519	return ts.tv_sec + ts.tv_nsec * 1e-9;	577	return ts.tv_sec + ts.tv_nsec * 1e-9;
520	#else	578	}
		579	#endif
		580
521	struct timeval tv;	581	struct timeval tv;
522	gettimeofday (&tv, 0);	582	gettimeofday (&tv, 0);
523	return tv.tv_sec + tv.tv_usec * 1e-6;	583	return tv.tv_sec + tv.tv_usec * 1e-6;
524	#endif
525	}	584	}
526		585
527	ev_tstamp inline_size	586	inline_size ev_tstamp
528	get_clock (void)	587	get_clock (void)
529	{	588	{
530	#if EV_USE_MONOTONIC	589	#if EV_USE_MONOTONIC
531	if (expect_true (have_monotonic))	590	if (expect_true (have_monotonic))
532	{	591	{
…		…
577		636
578	/*****************************************************************************/	637	/*****************************************************************************/
579		638
580	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	639	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
581		640
582	int inline_size	641	/* find a suitable new size for the given array, */
		642	/* hopefully by rounding to a ncie-to-malloc size */
		643	inline_size int
583	array_nextsize (int elem, int cur, int cnt)	644	array_nextsize (int elem, int cur, int cnt)
584	{	645	{
585	int ncur = cur + 1;	646	int ncur = cur + 1;
586		647
587	do	648	do
…		…
604	array_realloc (int elem, void *base, int *cur, int cnt)	665	array_realloc (int elem, void *base, int *cur, int cnt)
605	{	666	{
606	*cur = array_nextsize (elem, *cur, cnt);	667	*cur = array_nextsize (elem, *cur, cnt);
607	return ev_realloc (base, elem * *cur);	668	return ev_realloc (base, elem * *cur);
608	}	669	}
		670
		671	#define array_init_zero(base,count) \
		672	memset ((void *)(base), 0, sizeof (*(base)) * (count))
609		673
610	#define array_needsize(type,base,cur,cnt,init) \	674	#define array_needsize(type,base,cur,cnt,init) \
611	if (expect_false ((cnt) > (cur))) \	675	if (expect_false ((cnt) > (cur))) \
612	{ \	676	{ \
613	int ocur_ = (cur); \	677	int ocur_ = (cur); \
…		…
625	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	689	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
626	}	690	}
627	#endif	691	#endif
628		692
629	#define array_free(stem, idx) \	693	#define array_free(stem, idx) \
630	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	694	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
631		695
632	/*****************************************************************************/	696	/*****************************************************************************/
		697
		698	/* dummy callback for pending events */
		699	static void noinline
		700	pendingcb (EV_P_ ev_prepare *w, int revents)
		701	{
		702	}
633		703
634	void noinline	704	void noinline
635	ev_feed_event (EV_P_ void *w, int revents)	705	ev_feed_event (EV_P_ void *w, int revents)
636	{	706	{
637	W w_ = (W)w;	707	W w_ = (W)w;
…		…
646	pendings [pri][w_->pending - 1].w = w_;	716	pendings [pri][w_->pending - 1].w = w_;
647	pendings [pri][w_->pending - 1].events = revents;	717	pendings [pri][w_->pending - 1].events = revents;
648	}	718	}
649	}	719	}
650		720
651	void inline_speed	721	inline_speed void
		722	feed_reverse (EV_P_ W w)
		723	{
		724	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		725	rfeeds [rfeedcnt++] = w;
		726	}
		727
		728	inline_size void
		729	feed_reverse_done (EV_P_ int revents)
		730	{
		731	do
		732	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		733	while (rfeedcnt);
		734	}
		735
		736	inline_speed void
652	queue_events (EV_P_ W *events, int eventcnt, int type)	737	queue_events (EV_P_ W *events, int eventcnt, int type)
653	{	738	{
654	int i;	739	int i;
655		740
656	for (i = 0; i < eventcnt; ++i)	741	for (i = 0; i < eventcnt; ++i)
657	ev_feed_event (EV_A_ events [i], type);	742	ev_feed_event (EV_A_ events [i], type);
658	}	743	}
659		744
660	/*****************************************************************************/	745	/*****************************************************************************/
661		746
662	void inline_size	747	inline_speed void
663	anfds_init (ANFD *base, int count)
664	{
665	while (count--)
666	{
667	base->head = 0;
668	base->events = EV_NONE;
669	base->reify = 0;
670
671	++base;
672	}
673	}
674
675	void inline_speed
676	fd_event (EV_P_ int fd, int revents)	748	fd_event (EV_P_ int fd, int revents)
677	{	749	{
678	ANFD *anfd = anfds + fd;	750	ANFD *anfd = anfds + fd;
679	ev_io *w;	751	ev_io *w;
680		752
…		…
692	{	764	{
693	if (fd >= 0 && fd < anfdmax)	765	if (fd >= 0 && fd < anfdmax)
694	fd_event (EV_A_ fd, revents);	766	fd_event (EV_A_ fd, revents);
695	}	767	}
696		768
697	void inline_size	769	/* make sure the external fd watch events are in-sync */
		770	/* with the kernel/libev internal state */
		771	inline_size void
698	fd_reify (EV_P)	772	fd_reify (EV_P)
699	{	773	{
700	int i;	774	int i;
701		775
702	for (i = 0; i < fdchangecnt; ++i)	776	for (i = 0; i < fdchangecnt; ++i)
…		…
717	#ifdef EV_FD_TO_WIN32_HANDLE	791	#ifdef EV_FD_TO_WIN32_HANDLE
718	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	792	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
719	#else	793	#else
720	anfd->handle = _get_osfhandle (fd);	794	anfd->handle = _get_osfhandle (fd);
721	#endif	795	#endif
722	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	796	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
723	}	797	}
724	#endif	798	#endif
725		799
726	{	800	{
727	unsigned char o_events = anfd->events;	801	unsigned char o_events = anfd->events;
728	unsigned char o_reify = anfd->reify;	802	unsigned char o_reify = anfd->reify;
729		803
730	anfd->reify = 0;	804	anfd->reify = 0;
731	anfd->events = events;	805	anfd->events = events;
732		806
733	if (o_events != events || o_reify & EV_IOFDSET)	807	if (o_events != events || o_reify & EV__IOFDSET)
734	backend_modify (EV_A_ fd, o_events, events);	808	backend_modify (EV_A_ fd, o_events, events);
735	}	809	}
736	}	810	}
737		811
738	fdchangecnt = 0;	812	fdchangecnt = 0;
739	}	813	}
740		814
741	void inline_size	815	/* something about the given fd changed */
		816	inline_size void
742	fd_change (EV_P_ int fd, int flags)	817	fd_change (EV_P_ int fd, int flags)
743	{	818	{
744	unsigned char reify = anfds [fd].reify;	819	unsigned char reify = anfds [fd].reify;
745	anfds [fd].reify |= flags;	820	anfds [fd].reify |= flags;
746		821
…		…
750	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	825	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
751	fdchanges [fdchangecnt - 1] = fd;	826	fdchanges [fdchangecnt - 1] = fd;
752	}	827	}
753	}	828	}
754		829
755	void inline_speed	830	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		831	inline_speed void
756	fd_kill (EV_P_ int fd)	832	fd_kill (EV_P_ int fd)
757	{	833	{
758	ev_io *w;	834	ev_io *w;
759		835
760	while ((w = (ev_io *)anfds [fd].head))	836	while ((w = (ev_io *)anfds [fd].head))
…		…
762	ev_io_stop (EV_A_ w);	838	ev_io_stop (EV_A_ w);
763	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	839	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
764	}	840	}
765	}	841	}
766		842
767	int inline_size	843	/* check whether the given fd is atcually valid, for error recovery */
		844	inline_size int
768	fd_valid (int fd)	845	fd_valid (int fd)
769	{	846	{
770	#ifdef _WIN32	847	#ifdef _WIN32
771	return _get_osfhandle (fd) != -1;	848	return _get_osfhandle (fd) != -1;
772	#else	849	#else
…		…
808		885
809	for (fd = 0; fd < anfdmax; ++fd)	886	for (fd = 0; fd < anfdmax; ++fd)
810	if (anfds [fd].events)	887	if (anfds [fd].events)
811	{	888	{
812	anfds [fd].events = 0;	889	anfds [fd].events = 0;
		890	anfds [fd].emask = 0;
813	fd_change (EV_A_ fd, EV_IOFDSET | 1);	891	fd_change (EV_A_ fd, EV__IOFDSET | 1);
814	}	892	}
815	}	893	}
816		894
817	/*****************************************************************************/	895	/*****************************************************************************/
818		896
…		…
834	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	912	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
835	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	913	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
836	#define UPHEAP_DONE(p,k) ((p) == (k))	914	#define UPHEAP_DONE(p,k) ((p) == (k))
837		915
838	/* away from the root */	916	/* away from the root */
839	void inline_speed	917	inline_speed void
840	downheap (ANHE *heap, int N, int k)	918	downheap (ANHE *heap, int N, int k)
841	{	919	{
842	ANHE he = heap [k];	920	ANHE he = heap [k];
843	ANHE *E = heap + N + HEAP0;	921	ANHE *E = heap + N + HEAP0;
844		922
…		…
884	#define HEAP0 1	962	#define HEAP0 1
885	#define HPARENT(k) ((k) >> 1)	963	#define HPARENT(k) ((k) >> 1)
886	#define UPHEAP_DONE(p,k) (!(p))	964	#define UPHEAP_DONE(p,k) (!(p))
887		965
888	/* away from the root */	966	/* away from the root */
889	void inline_speed	967	inline_speed void
890	downheap (ANHE *heap, int N, int k)	968	downheap (ANHE *heap, int N, int k)
891	{	969	{
892	ANHE he = heap [k];	970	ANHE he = heap [k];
893		971
894	for (;;)	972	for (;;)
…		…
914	ev_active (ANHE_w (he)) = k;	992	ev_active (ANHE_w (he)) = k;
915	}	993	}
916	#endif	994	#endif
917		995
918	/* towards the root */	996	/* towards the root */
919	void inline_speed	997	inline_speed void
920	upheap (ANHE *heap, int k)	998	upheap (ANHE *heap, int k)
921	{	999	{
922	ANHE he = heap [k];	1000	ANHE he = heap [k];
923		1001
924	for (;;)	1002	for (;;)
…		…
935		1013
936	heap [k] = he;	1014	heap [k] = he;
937	ev_active (ANHE_w (he)) = k;	1015	ev_active (ANHE_w (he)) = k;
938	}	1016	}
939		1017
940	void inline_size	1018	/* move an element suitably so it is in a correct place */
		1019	inline_size void
941	adjustheap (ANHE *heap, int N, int k)	1020	adjustheap (ANHE *heap, int N, int k)
942	{	1021	{
943	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1022	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
944	upheap (heap, k);	1023	upheap (heap, k);
945	else	1024	else
946	downheap (heap, N, k);	1025	downheap (heap, N, k);
947	}	1026	}
948		1027
949	/* rebuild the heap: this function is used only once and executed rarely */	1028	/* rebuild the heap: this function is used only once and executed rarely */
950	void inline_size	1029	inline_size void
951	reheap (ANHE *heap, int N)	1030	reheap (ANHE *heap, int N)
952	{	1031	{
953	int i;	1032	int i;
954		1033
955	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1034	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
958	upheap (heap, i + HEAP0);	1037	upheap (heap, i + HEAP0);
959	}	1038	}
960		1039
961	/*****************************************************************************/	1040	/*****************************************************************************/
962		1041
		1042	/* associate signal watchers to a signal signal */
963	typedef struct	1043	typedef struct
964	{	1044	{
965	WL head;	1045	WL head;
966	EV_ATOMIC_T gotsig;	1046	EV_ATOMIC_T gotsig;
967	} ANSIG;	1047	} ANSIG;
…		…
969	static ANSIG *signals;	1049	static ANSIG *signals;
970	static int signalmax;	1050	static int signalmax;
971		1051
972	static EV_ATOMIC_T gotsig;	1052	static EV_ATOMIC_T gotsig;
973		1053
974	void inline_size
975	signals_init (ANSIG *base, int count)
976	{
977	while (count--)
978	{
979	base->head = 0;
980	base->gotsig = 0;
981
982	++base;
983	}
984	}
985
986	/*****************************************************************************/	1054	/*****************************************************************************/
987		1055
988	void inline_speed	1056	/* used to prepare libev internal fd's */
		1057	/* this is not fork-safe */
		1058	inline_speed void
989	fd_intern (int fd)	1059	fd_intern (int fd)
990	{	1060	{
991	#ifdef _WIN32	1061	#ifdef _WIN32
992	unsigned long arg = 1;	1062	unsigned long arg = 1;
993	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1063	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
998	}	1068	}
999		1069
1000	static void noinline	1070	static void noinline
1001	evpipe_init (EV_P)	1071	evpipe_init (EV_P)
1002	{	1072	{
1003	if (!ev_is_active (&pipeev))	1073	if (!ev_is_active (&pipe_w))
1004	{	1074	{
1005	#if EV_USE_EVENTFD	1075	#if EV_USE_EVENTFD
1006	if ((evfd = eventfd (0, 0)) >= 0)	1076	if ((evfd = eventfd (0, 0)) >= 0)
1007	{	1077	{
1008	evpipe [0] = -1;	1078	evpipe [0] = -1;
1009	fd_intern (evfd);	1079	fd_intern (evfd);
1010	ev_io_set (&pipeev, evfd, EV_READ);	1080	ev_io_set (&pipe_w, evfd, EV_READ);
1011	}	1081	}
1012	else	1082	else
1013	#endif	1083	#endif
1014	{	1084	{
1015	while (pipe (evpipe))	1085	while (pipe (evpipe))
1016	syserr ("(libev) error creating signal/async pipe");	1086	ev_syserr ("(libev) error creating signal/async pipe");
1017		1087
1018	fd_intern (evpipe [0]);	1088	fd_intern (evpipe [0]);
1019	fd_intern (evpipe [1]);	1089	fd_intern (evpipe [1]);
1020	ev_io_set (&pipeev, evpipe [0], EV_READ);	1090	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1021	}	1091	}
1022		1092
1023	ev_io_start (EV_A_ &pipeev);	1093	ev_io_start (EV_A_ &pipe_w);
1024	ev_unref (EV_A); /* watcher should not keep loop alive */	1094	ev_unref (EV_A); /* watcher should not keep loop alive */
1025	}	1095	}
1026	}	1096	}
1027		1097
1028	void inline_size	1098	inline_size void
1029	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1099	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1030	{	1100	{
1031	if (!*flag)	1101	if (!*flag)
1032	{	1102	{
1033	int old_errno = errno; /* save errno because write might clobber it */	1103	int old_errno = errno; /* save errno because write might clobber it */
…		…
1046		1116
1047	errno = old_errno;	1117	errno = old_errno;
1048	}	1118	}
1049	}	1119	}
1050		1120
		1121	/* called whenever the libev signal pipe */
		1122	/* got some events (signal, async) */
1051	static void	1123	static void
1052	pipecb (EV_P_ ev_io *iow, int revents)	1124	pipecb (EV_P_ ev_io *iow, int revents)
1053	{	1125	{
1054	#if EV_USE_EVENTFD	1126	#if EV_USE_EVENTFD
1055	if (evfd >= 0)	1127	if (evfd >= 0)
…		…
1111	ev_feed_signal_event (EV_P_ int signum)	1183	ev_feed_signal_event (EV_P_ int signum)
1112	{	1184	{
1113	WL w;	1185	WL w;
1114		1186
1115	#if EV_MULTIPLICITY	1187	#if EV_MULTIPLICITY
1116	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1188	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1117	#endif	1189	#endif
1118		1190
1119	--signum;	1191	--signum;
1120		1192
1121	if (signum < 0 || signum >= signalmax)	1193	if (signum < 0 || signum >= signalmax)
…		…
1137		1209
1138	#ifndef WIFCONTINUED	1210	#ifndef WIFCONTINUED
1139	# define WIFCONTINUED(status) 0	1211	# define WIFCONTINUED(status) 0
1140	#endif	1212	#endif
1141		1213
1142	void inline_speed	1214	/* handle a single child status event */
		1215	inline_speed void
1143	child_reap (EV_P_ int chain, int pid, int status)	1216	child_reap (EV_P_ int chain, int pid, int status)
1144	{	1217	{
1145	ev_child *w;	1218	ev_child *w;
1146	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1219	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1147		1220
…		…
1160		1233
1161	#ifndef WCONTINUED	1234	#ifndef WCONTINUED
1162	# define WCONTINUED 0	1235	# define WCONTINUED 0
1163	#endif	1236	#endif
1164		1237
		1238	/* called on sigchld etc., calls waitpid */
1165	static void	1239	static void
1166	childcb (EV_P_ ev_signal *sw, int revents)	1240	childcb (EV_P_ ev_signal *sw, int revents)
1167	{	1241	{
1168	int pid, status;	1242	int pid, status;
1169		1243
…		…
1250	/* kqueue is borked on everything but netbsd apparently */	1324	/* kqueue is borked on everything but netbsd apparently */
1251	/* it usually doesn't work correctly on anything but sockets and pipes */	1325	/* it usually doesn't work correctly on anything but sockets and pipes */
1252	flags &= ~EVBACKEND_KQUEUE;	1326	flags &= ~EVBACKEND_KQUEUE;
1253	#endif	1327	#endif
1254	#ifdef __APPLE__	1328	#ifdef __APPLE__
1255	// flags &= ~EVBACKEND_KQUEUE; for documentation	1329	/* only select works correctly on that "unix-certified" platform */
1256	flags &= ~EVBACKEND_POLL;	1330	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1331	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1257	#endif	1332	#endif
1258		1333
1259	return flags;	1334	return flags;
1260	}	1335	}
1261		1336
…		…
1293	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1368	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1294	{	1369	{
1295	timeout_blocktime = interval;	1370	timeout_blocktime = interval;
1296	}	1371	}
1297		1372
		1373	/* initialise a loop structure, must be zero-initialised */
1298	static void noinline	1374	static void noinline
1299	loop_init (EV_P_ unsigned int flags)	1375	loop_init (EV_P_ unsigned int flags)
1300	{	1376	{
1301	if (!backend)	1377	if (!backend)
1302	{	1378	{
		1379	#if EV_USE_REALTIME
		1380	if (!have_realtime)
		1381	{
		1382	struct timespec ts;
		1383
		1384	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1385	have_realtime = 1;
		1386	}
		1387	#endif
		1388
1303	#if EV_USE_MONOTONIC	1389	#if EV_USE_MONOTONIC
		1390	if (!have_monotonic)
1304	{	1391	{
1305	struct timespec ts;	1392	struct timespec ts;
		1393
1306	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1394	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1307	have_monotonic = 1;	1395	have_monotonic = 1;
1308	}	1396	}
1309	#endif	1397	#endif
1310		1398
1311	ev_rt_now = ev_time ();	1399	ev_rt_now = ev_time ();
1312	mn_now = get_clock ();	1400	mn_now = get_clock ();
1313	now_floor = mn_now;	1401	now_floor = mn_now;
…		…
1350	#endif	1438	#endif
1351	#if EV_USE_SELECT	1439	#if EV_USE_SELECT
1352	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1440	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1353	#endif	1441	#endif
1354		1442
		1443	ev_prepare_init (&pending_w, pendingcb);
		1444
1355	ev_init (&pipeev, pipecb);	1445	ev_init (&pipe_w, pipecb);
1356	ev_set_priority (&pipeev, EV_MAXPRI);	1446	ev_set_priority (&pipe_w, EV_MAXPRI);
1357	}	1447	}
1358	}	1448	}
1359		1449
		1450	/* free up a loop structure */
1360	static void noinline	1451	static void noinline
1361	loop_destroy (EV_P)	1452	loop_destroy (EV_P)
1362	{	1453	{
1363	int i;	1454	int i;
1364		1455
1365	if (ev_is_active (&pipeev))	1456	if (ev_is_active (&pipe_w))
1366	{	1457	{
1367	ev_ref (EV_A); /* signal watcher */	1458	ev_ref (EV_A); /* signal watcher */
1368	ev_io_stop (EV_A_ &pipeev);	1459	ev_io_stop (EV_A_ &pipe_w);
1369		1460
1370	#if EV_USE_EVENTFD	1461	#if EV_USE_EVENTFD
1371	if (evfd >= 0)	1462	if (evfd >= 0)
1372	close (evfd);	1463	close (evfd);
1373	#endif	1464	#endif
…		…
1412	}	1503	}
1413		1504
1414	ev_free (anfds); anfdmax = 0;	1505	ev_free (anfds); anfdmax = 0;
1415		1506
1416	/* have to use the microsoft-never-gets-it-right macro */	1507	/* have to use the microsoft-never-gets-it-right macro */
		1508	array_free (rfeed, EMPTY);
1417	array_free (fdchange, EMPTY);	1509	array_free (fdchange, EMPTY);
1418	array_free (timer, EMPTY);	1510	array_free (timer, EMPTY);
1419	#if EV_PERIODIC_ENABLE	1511	#if EV_PERIODIC_ENABLE
1420	array_free (periodic, EMPTY);	1512	array_free (periodic, EMPTY);
1421	#endif	1513	#endif
…		…
1430		1522
1431	backend = 0;	1523	backend = 0;
1432	}	1524	}
1433		1525
1434	#if EV_USE_INOTIFY	1526	#if EV_USE_INOTIFY
1435	void inline_size infy_fork (EV_P);	1527	inline_size void infy_fork (EV_P);
1436	#endif	1528	#endif
1437		1529
1438	void inline_size	1530	inline_size void
1439	loop_fork (EV_P)	1531	loop_fork (EV_P)
1440	{	1532	{
1441	#if EV_USE_PORT	1533	#if EV_USE_PORT
1442	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1534	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1443	#endif	1535	#endif
…		…
1449	#endif	1541	#endif
1450	#if EV_USE_INOTIFY	1542	#if EV_USE_INOTIFY
1451	infy_fork (EV_A);	1543	infy_fork (EV_A);
1452	#endif	1544	#endif
1453		1545
1454	if (ev_is_active (&pipeev))	1546	if (ev_is_active (&pipe_w))
1455	{	1547	{
1456	/* this "locks" the handlers against writing to the pipe */	1548	/* this "locks" the handlers against writing to the pipe */
1457	/* while we modify the fd vars */	1549	/* while we modify the fd vars */
1458	gotsig = 1;	1550	gotsig = 1;
1459	#if EV_ASYNC_ENABLE	1551	#if EV_ASYNC_ENABLE
1460	gotasync = 1;	1552	gotasync = 1;
1461	#endif	1553	#endif
1462		1554
1463	ev_ref (EV_A);	1555	ev_ref (EV_A);
1464	ev_io_stop (EV_A_ &pipeev);	1556	ev_io_stop (EV_A_ &pipe_w);
1465		1557
1466	#if EV_USE_EVENTFD	1558	#if EV_USE_EVENTFD
1467	if (evfd >= 0)	1559	if (evfd >= 0)
1468	close (evfd);	1560	close (evfd);
1469	#endif	1561	#endif
…		…
1474	close (evpipe [1]);	1566	close (evpipe [1]);
1475	}	1567	}
1476		1568
1477	evpipe_init (EV_A);	1569	evpipe_init (EV_A);
1478	/* now iterate over everything, in case we missed something */	1570	/* now iterate over everything, in case we missed something */
1479	pipecb (EV_A_ &pipeev, EV_READ);	1571	pipecb (EV_A_ &pipe_w, EV_READ);
1480	}	1572	}
1481		1573
1482	postfork = 0;	1574	postfork = 0;
1483	}	1575	}
1484		1576
…		…
1514		1606
1515	#if EV_VERIFY	1607	#if EV_VERIFY
1516	static void noinline	1608	static void noinline
1517	verify_watcher (EV_P_ W w)	1609	verify_watcher (EV_P_ W w)
1518	{	1610	{
1519	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1611	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1520		1612
1521	if (w->pending)	1613	if (w->pending)
1522	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	1614	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1523	}	1615	}
1524		1616
1525	static void noinline	1617	static void noinline
1526	verify_heap (EV_P_ ANHE *heap, int N)	1618	verify_heap (EV_P_ ANHE *heap, int N)
1527	{	1619	{
1528	int i;	1620	int i;
1529		1621
1530	for (i = HEAP0; i < N + HEAP0; ++i)	1622	for (i = HEAP0; i < N + HEAP0; ++i)
1531	{	1623	{
1532	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));	1624	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1533	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));	1625	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1534	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));	1626	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1535		1627
1536	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1628	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1537	}	1629	}
1538	}	1630	}
1539		1631
1540	static void noinline	1632	static void noinline
1541	array_verify (EV_P_ W *ws, int cnt)	1633	array_verify (EV_P_ W *ws, int cnt)
1542	{	1634	{
1543	while (cnt--)	1635	while (cnt--)
1544	{	1636	{
1545	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1637	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1546	verify_watcher (EV_A_ ws [cnt]);	1638	verify_watcher (EV_A_ ws [cnt]);
1547	}	1639	}
1548	}	1640	}
1549	#endif	1641	#endif
1550		1642
…		…
1557		1649
1558	assert (activecnt >= -1);	1650	assert (activecnt >= -1);
1559		1651
1560	assert (fdchangemax >= fdchangecnt);	1652	assert (fdchangemax >= fdchangecnt);
1561	for (i = 0; i < fdchangecnt; ++i)	1653	for (i = 0; i < fdchangecnt; ++i)
1562	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1654	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1563		1655
1564	assert (anfdmax >= 0);	1656	assert (anfdmax >= 0);
1565	for (i = 0; i < anfdmax; ++i)	1657	for (i = 0; i < anfdmax; ++i)
1566	for (w = anfds [i].head; w; w = w->next)	1658	for (w = anfds [i].head; w; w = w->next)
1567	{	1659	{
1568	verify_watcher (EV_A_ (W)w);	1660	verify_watcher (EV_A_ (W)w);
1569	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1661	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1570	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));	1662	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1571	}	1663	}
1572		1664
1573	assert (timermax >= timercnt);	1665	assert (timermax >= timercnt);
1574	verify_heap (EV_A_ timers, timercnt);	1666	verify_heap (EV_A_ timers, timercnt);
1575		1667
…		…
1652	{	1744	{
1653	#if EV_MULTIPLICITY	1745	#if EV_MULTIPLICITY
1654	struct ev_loop *loop = ev_default_loop_ptr;	1746	struct ev_loop *loop = ev_default_loop_ptr;
1655	#endif	1747	#endif
1656		1748
		1749	ev_default_loop_ptr = 0;
		1750
1657	#ifndef _WIN32	1751	#ifndef _WIN32
1658	ev_ref (EV_A); /* child watcher */	1752	ev_ref (EV_A); /* child watcher */
1659	ev_signal_stop (EV_A_ &childev);	1753	ev_signal_stop (EV_A_ &childev);
1660	#endif	1754	#endif
1661		1755
…		…
1667	{	1761	{
1668	#if EV_MULTIPLICITY	1762	#if EV_MULTIPLICITY
1669	struct ev_loop *loop = ev_default_loop_ptr;	1763	struct ev_loop *loop = ev_default_loop_ptr;
1670	#endif	1764	#endif
1671		1765
1672	if (backend)
1673	postfork = 1; /* must be in line with ev_loop_fork */	1766	postfork = 1; /* must be in line with ev_loop_fork */
1674	}	1767	}
1675		1768
1676	/*****************************************************************************/	1769	/*****************************************************************************/
1677		1770
1678	void	1771	void
1679	ev_invoke (EV_P_ void *w, int revents)	1772	ev_invoke (EV_P_ void *w, int revents)
1680	{	1773	{
1681	EV_CB_INVOKE ((W)w, revents);	1774	EV_CB_INVOKE ((W)w, revents);
1682	}	1775	}
1683		1776
1684	void inline_speed	1777	inline_speed void
1685	call_pending (EV_P)	1778	call_pending (EV_P)
1686	{	1779	{
1687	int pri;	1780	int pri;
1688		1781
1689	for (pri = NUMPRI; pri--; )	1782	for (pri = NUMPRI; pri--; )
1690	while (pendingcnt [pri])	1783	while (pendingcnt [pri])
1691	{	1784	{
1692	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1785	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1693		1786
1694	if (expect_true (p->w))
1695	{
1696	/*assert (("non-pending watcher on pending list", p->w->pending));*/	1787	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1788	/* ^ this is no longer true, as pending_w could be here */
1697		1789
1698	p->w->pending = 0;	1790	p->w->pending = 0;
1699	EV_CB_INVOKE (p->w, p->events);	1791	EV_CB_INVOKE (p->w, p->events);
1700	EV_FREQUENT_CHECK;	1792	EV_FREQUENT_CHECK;
1701	}
1702	}	1793	}
1703	}	1794	}
1704		1795
1705	#if EV_IDLE_ENABLE	1796	#if EV_IDLE_ENABLE
1706	void inline_size	1797	/* make idle watchers pending. this handles the "call-idle */
		1798	/* only when higher priorities are idle" logic */
		1799	inline_size void
1707	idle_reify (EV_P)	1800	idle_reify (EV_P)
1708	{	1801	{
1709	if (expect_false (idleall))	1802	if (expect_false (idleall))
1710	{	1803	{
1711	int pri;	1804	int pri;
…		…
1723	}	1816	}
1724	}	1817	}
1725	}	1818	}
1726	#endif	1819	#endif
1727		1820
1728	void inline_size	1821	/* make timers pending */
		1822	inline_size void
1729	timers_reify (EV_P)	1823	timers_reify (EV_P)
1730	{	1824	{
1731	EV_FREQUENT_CHECK;	1825	EV_FREQUENT_CHECK;
1732		1826
1733	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1827	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1734	{	1828	{
1735	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1829	do
1736
1737	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1738
1739	/* first reschedule or stop timer */
1740	if (w->repeat)
1741	{	1830	{
		1831	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1832
		1833	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1834
		1835	/* first reschedule or stop timer */
		1836	if (w->repeat)
		1837	{
1742	ev_at (w) += w->repeat;	1838	ev_at (w) += w->repeat;
1743	if (ev_at (w) < mn_now)	1839	if (ev_at (w) < mn_now)
1744	ev_at (w) = mn_now;	1840	ev_at (w) = mn_now;
1745		1841
1746	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1842	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1747		1843
1748	ANHE_at_cache (timers [HEAP0]);	1844	ANHE_at_cache (timers [HEAP0]);
1749	downheap (timers, timercnt, HEAP0);	1845	downheap (timers, timercnt, HEAP0);
		1846	}
		1847	else
		1848	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1849
		1850	EV_FREQUENT_CHECK;
		1851	feed_reverse (EV_A_ (W)w);
1750	}	1852	}
1751	else	1853	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1752	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1753		1854
1754	EV_FREQUENT_CHECK;
1755	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1855	feed_reverse_done (EV_A_ EV_TIMEOUT);
1756	}	1856	}
1757	}	1857	}
1758		1858
1759	#if EV_PERIODIC_ENABLE	1859	#if EV_PERIODIC_ENABLE
1760	void inline_size	1860	/* make periodics pending */
		1861	inline_size void
1761	periodics_reify (EV_P)	1862	periodics_reify (EV_P)
1762	{	1863	{
1763	EV_FREQUENT_CHECK;	1864	EV_FREQUENT_CHECK;
1764		1865
1765	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1866	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1766	{	1867	{
1767	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1868	int feed_count = 0;
1768		1869
1769	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1870	do
1770
1771	/* first reschedule or stop timer */
1772	if (w->reschedule_cb)
1773	{	1871	{
		1872	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1873
		1874	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		1875
		1876	/* first reschedule or stop timer */
		1877	if (w->reschedule_cb)
		1878	{
1774	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1879	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1775		1880
1776	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1881	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1777		1882
1778	ANHE_at_cache (periodics [HEAP0]);	1883	ANHE_at_cache (periodics [HEAP0]);
1779	downheap (periodics, periodiccnt, HEAP0);	1884	downheap (periodics, periodiccnt, HEAP0);
		1885	}
		1886	else if (w->interval)
		1887	{
		1888	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1889	/* if next trigger time is not sufficiently in the future, put it there */
		1890	/* this might happen because of floating point inexactness */
		1891	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1892	{
		1893	ev_at (w) += w->interval;
		1894
		1895	/* if interval is unreasonably low we might still have a time in the past */
		1896	/* so correct this. this will make the periodic very inexact, but the user */
		1897	/* has effectively asked to get triggered more often than possible */
		1898	if (ev_at (w) < ev_rt_now)
		1899	ev_at (w) = ev_rt_now;
		1900	}
		1901
		1902	ANHE_at_cache (periodics [HEAP0]);
		1903	downheap (periodics, periodiccnt, HEAP0);
		1904	}
		1905	else
		1906	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1907
		1908	EV_FREQUENT_CHECK;
		1909	feed_reverse (EV_A_ (W)w);
1780	}	1910	}
1781	else if (w->interval)	1911	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1782	{
1783	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1784	/* if next trigger time is not sufficiently in the future, put it there */
1785	/* this might happen because of floating point inexactness */
1786	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1787	{
1788	ev_at (w) += w->interval;
1789		1912
1790	/* if interval is unreasonably low we might still have a time in the past */
1791	/* so correct this. this will make the periodic very inexact, but the user */
1792	/* has effectively asked to get triggered more often than possible */
1793	if (ev_at (w) < ev_rt_now)
1794	ev_at (w) = ev_rt_now;
1795	}
1796
1797	ANHE_at_cache (periodics [HEAP0]);
1798	downheap (periodics, periodiccnt, HEAP0);
1799	}
1800	else
1801	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1802
1803	EV_FREQUENT_CHECK;
1804	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1913	feed_reverse_done (EV_A_ EV_PERIODIC);
1805	}	1914	}
1806	}	1915	}
1807		1916
		1917	/* simply recalculate all periodics */
		1918	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1808	static void noinline	1919	static void noinline
1809	periodics_reschedule (EV_P)	1920	periodics_reschedule (EV_P)
1810	{	1921	{
1811	int i;	1922	int i;
1812		1923
…		…
1825		1936
1826	reheap (periodics, periodiccnt);	1937	reheap (periodics, periodiccnt);
1827	}	1938	}
1828	#endif	1939	#endif
1829		1940
1830	void inline_speed	1941	/* adjust all timers by a given offset */
		1942	static void noinline
		1943	timers_reschedule (EV_P_ ev_tstamp adjust)
		1944	{
		1945	int i;
		1946
		1947	for (i = 0; i < timercnt; ++i)
		1948	{
		1949	ANHE *he = timers + i + HEAP0;
		1950	ANHE_w (*he)->at += adjust;
		1951	ANHE_at_cache (*he);
		1952	}
		1953	}
		1954
		1955	/* fetch new monotonic and realtime times from the kernel */
		1956	/* also detetc if there was a timejump, and act accordingly */
		1957	inline_speed void
1831	time_update (EV_P_ ev_tstamp max_block)	1958	time_update (EV_P_ ev_tstamp max_block)
1832	{	1959	{
1833	int i;
1834
1835	#if EV_USE_MONOTONIC	1960	#if EV_USE_MONOTONIC
1836	if (expect_true (have_monotonic))	1961	if (expect_true (have_monotonic))
1837	{	1962	{
		1963	int i;
1838	ev_tstamp odiff = rtmn_diff;	1964	ev_tstamp odiff = rtmn_diff;
1839		1965
1840	mn_now = get_clock ();	1966	mn_now = get_clock ();
1841		1967
1842	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1968	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1868	ev_rt_now = ev_time ();	1994	ev_rt_now = ev_time ();
1869	mn_now = get_clock ();	1995	mn_now = get_clock ();
1870	now_floor = mn_now;	1996	now_floor = mn_now;
1871	}	1997	}
1872		1998
		1999	/* no timer adjustment, as the monotonic clock doesn't jump */
		2000	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1873	# if EV_PERIODIC_ENABLE	2001	# if EV_PERIODIC_ENABLE
1874	periodics_reschedule (EV_A);	2002	periodics_reschedule (EV_A);
1875	# endif	2003	# endif
1876	/* no timer adjustment, as the monotonic clock doesn't jump */
1877	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1878	}	2004	}
1879	else	2005	else
1880	#endif	2006	#endif
1881	{	2007	{
1882	ev_rt_now = ev_time ();	2008	ev_rt_now = ev_time ();
1883		2009
1884	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2010	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1885	{	2011	{
		2012	/* adjust timers. this is easy, as the offset is the same for all of them */
		2013	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1886	#if EV_PERIODIC_ENABLE	2014	#if EV_PERIODIC_ENABLE
1887	periodics_reschedule (EV_A);	2015	periodics_reschedule (EV_A);
1888	#endif	2016	#endif
1889	/* adjust timers. this is easy, as the offset is the same for all of them */
1890	for (i = 0; i < timercnt; ++i)
1891	{
1892	ANHE *he = timers + i + HEAP0;
1893	ANHE_w (*he)->at += ev_rt_now - mn_now;
1894	ANHE_at_cache (*he);
1895	}
1896	}	2017	}
1897		2018
1898	mn_now = ev_rt_now;	2019	mn_now = ev_rt_now;
1899	}	2020	}
1900	}
1901
1902	void
1903	ev_ref (EV_P)
1904	{
1905	++activecnt;
1906	}
1907
1908	void
1909	ev_unref (EV_P)
1910	{
1911	--activecnt;
1912	}	2021	}
1913		2022
1914	static int loop_done;	2023	static int loop_done;
1915		2024
1916	void	2025	void
…		…
1950	{	2059	{
1951	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2060	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1952	call_pending (EV_A);	2061	call_pending (EV_A);
1953	}	2062	}
1954		2063
1955	if (expect_false (!activecnt))
1956	break;
1957
1958	/* we might have forked, so reify kernel state if necessary */	2064	/* we might have forked, so reify kernel state if necessary */
1959	if (expect_false (postfork))	2065	if (expect_false (postfork))
1960	loop_fork (EV_A);	2066	loop_fork (EV_A);
1961		2067
1962	/* update fd-related kernel structures */	2068	/* update fd-related kernel structures */
…		…
2041	ev_unloop (EV_P_ int how)	2147	ev_unloop (EV_P_ int how)
2042	{	2148	{
2043	loop_done = how;	2149	loop_done = how;
2044	}	2150	}
2045		2151
		2152	void
		2153	ev_ref (EV_P)
		2154	{
		2155	++activecnt;
		2156	}
		2157
		2158	void
		2159	ev_unref (EV_P)
		2160	{
		2161	--activecnt;
		2162	}
		2163
		2164	void
		2165	ev_now_update (EV_P)
		2166	{
		2167	time_update (EV_A_ 1e100);
		2168	}
		2169
		2170	void
		2171	ev_suspend (EV_P)
		2172	{
		2173	ev_now_update (EV_A);
		2174	}
		2175
		2176	void
		2177	ev_resume (EV_P)
		2178	{
		2179	ev_tstamp mn_prev = mn_now;
		2180
		2181	ev_now_update (EV_A);
		2182	timers_reschedule (EV_A_ mn_now - mn_prev);
		2183	#if EV_PERIODIC_ENABLE
		2184	/* TODO: really do this? */
		2185	periodics_reschedule (EV_A);
		2186	#endif
		2187	}
		2188
2046	/*****************************************************************************/	2189	/*****************************************************************************/
		2190	/* singly-linked list management, used when the expected list length is short */
2047		2191
2048	void inline_size	2192	inline_size void
2049	wlist_add (WL *head, WL elem)	2193	wlist_add (WL *head, WL elem)
2050	{	2194	{
2051	elem->next = *head;	2195	elem->next = *head;
2052	*head = elem;	2196	*head = elem;
2053	}	2197	}
2054		2198
2055	void inline_size	2199	inline_size void
2056	wlist_del (WL *head, WL elem)	2200	wlist_del (WL *head, WL elem)
2057	{	2201	{
2058	while (*head)	2202	while (*head)
2059	{	2203	{
2060	if (*head == elem)	2204	if (*head == elem)
…		…
2065		2209
2066	head = &(*head)->next;	2210	head = &(*head)->next;
2067	}	2211	}
2068	}	2212	}
2069		2213
2070	void inline_speed	2214	/* internal, faster, version of ev_clear_pending */
		2215	inline_speed void
2071	clear_pending (EV_P_ W w)	2216	clear_pending (EV_P_ W w)
2072	{	2217	{
2073	if (w->pending)	2218	if (w->pending)
2074	{	2219	{
2075	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2220	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2076	w->pending = 0;	2221	w->pending = 0;
2077	}	2222	}
2078	}	2223	}
2079		2224
2080	int	2225	int
…		…
2084	int pending = w_->pending;	2229	int pending = w_->pending;
2085		2230
2086	if (expect_true (pending))	2231	if (expect_true (pending))
2087	{	2232	{
2088	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2233	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2234	p->w = (W)&pending_w;
2089	w_->pending = 0;	2235	w_->pending = 0;
2090	p->w = 0;
2091	return p->events;	2236	return p->events;
2092	}	2237	}
2093	else	2238	else
2094	return 0;	2239	return 0;
2095	}	2240	}
2096		2241
2097	void inline_size	2242	inline_size void
2098	pri_adjust (EV_P_ W w)	2243	pri_adjust (EV_P_ W w)
2099	{	2244	{
2100	int pri = w->priority;	2245	int pri = w->priority;
2101	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2246	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2102	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2247	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2103	w->priority = pri;	2248	w->priority = pri;
2104	}	2249	}
2105		2250
2106	void inline_speed	2251	inline_speed void
2107	ev_start (EV_P_ W w, int active)	2252	ev_start (EV_P_ W w, int active)
2108	{	2253	{
2109	pri_adjust (EV_A_ w);	2254	pri_adjust (EV_A_ w);
2110	w->active = active;	2255	w->active = active;
2111	ev_ref (EV_A);	2256	ev_ref (EV_A);
2112	}	2257	}
2113		2258
2114	void inline_size	2259	inline_size void
2115	ev_stop (EV_P_ W w)	2260	ev_stop (EV_P_ W w)
2116	{	2261	{
2117	ev_unref (EV_A);	2262	ev_unref (EV_A);
2118	w->active = 0;	2263	w->active = 0;
2119	}	2264	}
…		…
2126	int fd = w->fd;	2271	int fd = w->fd;
2127		2272
2128	if (expect_false (ev_is_active (w)))	2273	if (expect_false (ev_is_active (w)))
2129	return;	2274	return;
2130		2275
2131	assert (("ev_io_start called with negative fd", fd >= 0));	2276	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2277	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2132		2278
2133	EV_FREQUENT_CHECK;	2279	EV_FREQUENT_CHECK;
2134		2280
2135	ev_start (EV_A_ (W)w, 1);	2281	ev_start (EV_A_ (W)w, 1);
2136	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2282	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2137	wlist_add (&anfds[fd].head, (WL)w);	2283	wlist_add (&anfds[fd].head, (WL)w);
2138		2284
2139	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2285	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2140	w->events &= ~EV_IOFDSET;	2286	w->events &= ~EV__IOFDSET;
2141		2287
2142	EV_FREQUENT_CHECK;	2288	EV_FREQUENT_CHECK;
2143	}	2289	}
2144		2290
2145	void noinline	2291	void noinline
…		…
2147	{	2293	{
2148	clear_pending (EV_A_ (W)w);	2294	clear_pending (EV_A_ (W)w);
2149	if (expect_false (!ev_is_active (w)))	2295	if (expect_false (!ev_is_active (w)))
2150	return;	2296	return;
2151		2297
2152	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2298	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2153		2299
2154	EV_FREQUENT_CHECK;	2300	EV_FREQUENT_CHECK;
2155		2301
2156	wlist_del (&anfds[w->fd].head, (WL)w);	2302	wlist_del (&anfds[w->fd].head, (WL)w);
2157	ev_stop (EV_A_ (W)w);	2303	ev_stop (EV_A_ (W)w);
…		…
2167	if (expect_false (ev_is_active (w)))	2313	if (expect_false (ev_is_active (w)))
2168	return;	2314	return;
2169		2315
2170	ev_at (w) += mn_now;	2316	ev_at (w) += mn_now;
2171		2317
2172	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2318	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2173		2319
2174	EV_FREQUENT_CHECK;	2320	EV_FREQUENT_CHECK;
2175		2321
2176	++timercnt;	2322	++timercnt;
2177	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2323	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2180	ANHE_at_cache (timers [ev_active (w)]);	2326	ANHE_at_cache (timers [ev_active (w)]);
2181	upheap (timers, ev_active (w));	2327	upheap (timers, ev_active (w));
2182		2328
2183	EV_FREQUENT_CHECK;	2329	EV_FREQUENT_CHECK;
2184		2330
2185	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2331	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2186	}	2332	}
2187		2333
2188	void noinline	2334	void noinline
2189	ev_timer_stop (EV_P_ ev_timer *w)	2335	ev_timer_stop (EV_P_ ev_timer *w)
2190	{	2336	{
…		…
2195	EV_FREQUENT_CHECK;	2341	EV_FREQUENT_CHECK;
2196		2342
2197	{	2343	{
2198	int active = ev_active (w);	2344	int active = ev_active (w);
2199		2345
2200	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2346	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2201		2347
2202	--timercnt;	2348	--timercnt;
2203		2349
2204	if (expect_true (active < timercnt + HEAP0))	2350	if (expect_true (active < timercnt + HEAP0))
2205	{	2351	{
…		…
2249		2395
2250	if (w->reschedule_cb)	2396	if (w->reschedule_cb)
2251	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2397	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2252	else if (w->interval)	2398	else if (w->interval)
2253	{	2399	{
2254	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2400	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2255	/* this formula differs from the one in periodic_reify because we do not always round up */	2401	/* this formula differs from the one in periodic_reify because we do not always round up */
2256	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2402	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2257	}	2403	}
2258	else	2404	else
2259	ev_at (w) = w->offset;	2405	ev_at (w) = w->offset;
…		…
2267	ANHE_at_cache (periodics [ev_active (w)]);	2413	ANHE_at_cache (periodics [ev_active (w)]);
2268	upheap (periodics, ev_active (w));	2414	upheap (periodics, ev_active (w));
2269		2415
2270	EV_FREQUENT_CHECK;	2416	EV_FREQUENT_CHECK;
2271		2417
2272	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2418	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2273	}	2419	}
2274		2420
2275	void noinline	2421	void noinline
2276	ev_periodic_stop (EV_P_ ev_periodic *w)	2422	ev_periodic_stop (EV_P_ ev_periodic *w)
2277	{	2423	{
…		…
2282	EV_FREQUENT_CHECK;	2428	EV_FREQUENT_CHECK;
2283		2429
2284	{	2430	{
2285	int active = ev_active (w);	2431	int active = ev_active (w);
2286		2432
2287	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2433	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2288		2434
2289	--periodiccnt;	2435	--periodiccnt;
2290		2436
2291	if (expect_true (active < periodiccnt + HEAP0))	2437	if (expect_true (active < periodiccnt + HEAP0))
2292	{	2438	{
…		…
2315		2461
2316	void noinline	2462	void noinline
2317	ev_signal_start (EV_P_ ev_signal *w)	2463	ev_signal_start (EV_P_ ev_signal *w)
2318	{	2464	{
2319	#if EV_MULTIPLICITY	2465	#if EV_MULTIPLICITY
2320	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2466	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2321	#endif	2467	#endif
2322	if (expect_false (ev_is_active (w)))	2468	if (expect_false (ev_is_active (w)))
2323	return;	2469	return;
2324		2470
2325	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2471	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2326		2472
2327	evpipe_init (EV_A);	2473	evpipe_init (EV_A);
2328		2474
2329	EV_FREQUENT_CHECK;	2475	EV_FREQUENT_CHECK;
2330		2476
…		…
2333	sigset_t full, prev;	2479	sigset_t full, prev;
2334	sigfillset (&full);	2480	sigfillset (&full);
2335	sigprocmask (SIG_SETMASK, &full, &prev);	2481	sigprocmask (SIG_SETMASK, &full, &prev);
2336	#endif	2482	#endif
2337		2483
2338	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2484	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2339		2485
2340	#ifndef _WIN32	2486	#ifndef _WIN32
2341	sigprocmask (SIG_SETMASK, &prev, 0);	2487	sigprocmask (SIG_SETMASK, &prev, 0);
2342	#endif	2488	#endif
2343	}	2489	}
…		…
2381		2527
2382	void	2528	void
2383	ev_child_start (EV_P_ ev_child *w)	2529	ev_child_start (EV_P_ ev_child *w)
2384	{	2530	{
2385	#if EV_MULTIPLICITY	2531	#if EV_MULTIPLICITY
2386	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2532	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2387	#endif	2533	#endif
2388	if (expect_false (ev_is_active (w)))	2534	if (expect_false (ev_is_active (w)))
2389	return;	2535	return;
2390		2536
2391	EV_FREQUENT_CHECK;	2537	EV_FREQUENT_CHECK;
…		…
2416	# ifdef _WIN32	2562	# ifdef _WIN32
2417	# undef lstat	2563	# undef lstat
2418	# define lstat(a,b) _stati64 (a,b)	2564	# define lstat(a,b) _stati64 (a,b)
2419	# endif	2565	# endif
2420		2566
2421	#define DEF_STAT_INTERVAL 5.0074891	2567	#define DEF_STAT_INTERVAL 5.0074891
		2568	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2422	#define MIN_STAT_INTERVAL 0.1074891	2569	#define MIN_STAT_INTERVAL 0.1074891
2423		2570
2424	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2571	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2425		2572
2426	#if EV_USE_INOTIFY	2573	#if EV_USE_INOTIFY
2427	# define EV_INOTIFY_BUFSIZE 8192	2574	# define EV_INOTIFY_BUFSIZE 8192
…		…
2431	{	2578	{
2432	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);	2579	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);
2433		2580
2434	if (w->wd < 0)	2581	if (w->wd < 0)
2435	{	2582	{
		2583	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2436	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2584	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2437		2585
2438	/* monitor some parent directory for speedup hints */	2586	/* monitor some parent directory for speedup hints */
2439	/* note that exceeding the hardcoded limit is not a correctness issue, */	2587	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2440	/* but an efficiency issue only */	2588	/* but an efficiency issue only */
2441	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2589	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2442	{	2590	{
2443	char path [4096];	2591	char path [4096];
2444	strcpy (path, w->path);	2592	strcpy (path, w->path);
…		…
2448	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2596	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2449	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2597	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2450		2598
2451	char *pend = strrchr (path, '/');	2599	char *pend = strrchr (path, '/');
2452		2600
2453	if (!pend)	2601	if (!pend || pend == path)
2454	break; /* whoops, no '/', complain to your admin */	2602	break;
2455		2603
2456	*pend = 0;	2604	*pend = 0;
2457	w->wd = inotify_add_watch (fs_fd, path, mask);	2605	w->wd = inotify_add_watch (fs_fd, path, mask);
2458	}	2606	}
2459	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2607	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2460	}	2608	}
2461	}	2609	}
2462	else
2463	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2464		2610
2465	if (w->wd >= 0)	2611	if (w->wd >= 0)
		2612	{
2466	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2613	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2614
		2615	/* now local changes will be tracked by inotify, but remote changes won't */
		2616	/* unless the filesystem it known to be local, we therefore still poll */
		2617	/* also do poll on <2.6.25, but with normal frequency */
		2618	struct statfs sfs;
		2619
		2620	if (fs_2625 && !statfs (w->path, &sfs))
		2621	if (sfs.f_type == 0x1373 /* devfs */
		2622	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2623	|| sfs.f_type == 0x3153464a /* jfs */
		2624	|| sfs.f_type == 0x52654973 /* reiser3 */
		2625	|| sfs.f_type == 0x01021994 /* tempfs */
		2626	|| sfs.f_type == 0x58465342 /* xfs */)
		2627	return;
		2628
		2629	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2630	ev_timer_again (EV_A_ &w->timer);
		2631	}
2467	}	2632	}
2468		2633
2469	static void noinline	2634	static void noinline
2470	infy_del (EV_P_ ev_stat *w)	2635	infy_del (EV_P_ ev_stat *w)
2471	{	2636	{
…		…
2485		2650
2486	static void noinline	2651	static void noinline
2487	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)	2652	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2488	{	2653	{
2489	if (slot < 0)	2654	if (slot < 0)
2490	/* overflow, need to check for all hahs slots */	2655	/* overflow, need to check for all hash slots */
2491	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	2656	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2492	infy_wd (EV_A_ slot, wd, ev);	2657	infy_wd (EV_A_ slot, wd, ev);
2493	else	2658	else
2494	{	2659	{
2495	WL w_;	2660	WL w_;
…		…
2501		2666
2502	if (w->wd == wd || wd == -1)	2667	if (w->wd == wd || wd == -1)
2503	{	2668	{
2504	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2669	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2505	{	2670	{
		2671	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2506	w->wd = -1;	2672	w->wd = -1;
2507	infy_add (EV_A_ w); /* re-add, no matter what */	2673	infy_add (EV_A_ w); /* re-add, no matter what */
2508	}	2674	}
2509		2675
2510	stat_timer_cb (EV_A_ &w->timer, 0);	2676	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2523		2689
2524	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2690	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2525	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2691	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2526	}	2692	}
2527		2693
2528	void inline_size	2694	inline_size void
		2695	check_2625 (EV_P)
		2696	{
		2697	/* kernels < 2.6.25 are borked
		2698	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		2699	*/
		2700	struct utsname buf;
		2701	int major, minor, micro;
		2702
		2703	if (uname (&buf))
		2704	return;
		2705
		2706	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
		2707	return;
		2708
		2709	if (major < 2
		2710	|| (major == 2 && minor < 6)
		2711	|| (major == 2 && minor == 6 && micro < 25))
		2712	return;
		2713
		2714	fs_2625 = 1;
		2715	}
		2716
		2717	inline_size void
2529	infy_init (EV_P)	2718	infy_init (EV_P)
2530	{	2719	{
2531	if (fs_fd != -2)	2720	if (fs_fd != -2)
2532	return;	2721	return;
		2722
		2723	fs_fd = -1;
		2724
		2725	check_2625 (EV_A);
2533		2726
2534	fs_fd = inotify_init ();	2727	fs_fd = inotify_init ();
2535		2728
2536	if (fs_fd >= 0)	2729	if (fs_fd >= 0)
2537	{	2730	{
…		…
2539	ev_set_priority (&fs_w, EV_MAXPRI);	2732	ev_set_priority (&fs_w, EV_MAXPRI);
2540	ev_io_start (EV_A_ &fs_w);	2733	ev_io_start (EV_A_ &fs_w);
2541	}	2734	}
2542	}	2735	}
2543		2736
2544	void inline_size	2737	inline_size void
2545	infy_fork (EV_P)	2738	infy_fork (EV_P)
2546	{	2739	{
2547	int slot;	2740	int slot;
2548		2741
2549	if (fs_fd < 0)	2742	if (fs_fd < 0)
…		…
2565	w->wd = -1;	2758	w->wd = -1;
2566		2759
2567	if (fs_fd >= 0)	2760	if (fs_fd >= 0)
2568	infy_add (EV_A_ w); /* re-add, no matter what */	2761	infy_add (EV_A_ w); /* re-add, no matter what */
2569	else	2762	else
2570	ev_timer_start (EV_A_ &w->timer);	2763	ev_timer_again (EV_A_ &w->timer);
2571	}	2764	}
2572
2573	}	2765	}
2574	}	2766	}
2575		2767
2576	#endif	2768	#endif
2577		2769
…		…
2613	|| w->prev.st_atime != w->attr.st_atime	2805	|| w->prev.st_atime != w->attr.st_atime
2614	|| w->prev.st_mtime != w->attr.st_mtime	2806	|| w->prev.st_mtime != w->attr.st_mtime
2615	|| w->prev.st_ctime != w->attr.st_ctime	2807	|| w->prev.st_ctime != w->attr.st_ctime
2616	) {	2808	) {
2617	#if EV_USE_INOTIFY	2809	#if EV_USE_INOTIFY
		2810	if (fs_fd >= 0)
		2811	{
2618	infy_del (EV_A_ w);	2812	infy_del (EV_A_ w);
2619	infy_add (EV_A_ w);	2813	infy_add (EV_A_ w);
2620	ev_stat_stat (EV_A_ w); /* avoid race... */	2814	ev_stat_stat (EV_A_ w); /* avoid race... */
		2815	}
2621	#endif	2816	#endif
2622		2817
2623	ev_feed_event (EV_A_ w, EV_STAT);	2818	ev_feed_event (EV_A_ w, EV_STAT);
2624	}	2819	}
2625	}	2820	}
…		…
2628	ev_stat_start (EV_P_ ev_stat *w)	2823	ev_stat_start (EV_P_ ev_stat *w)
2629	{	2824	{
2630	if (expect_false (ev_is_active (w)))	2825	if (expect_false (ev_is_active (w)))
2631	return;	2826	return;
2632		2827
2633	/* since we use memcmp, we need to clear any padding data etc. */
2634	memset (&w->prev, 0, sizeof (ev_statdata));
2635	memset (&w->attr, 0, sizeof (ev_statdata));
2636
2637	ev_stat_stat (EV_A_ w);	2828	ev_stat_stat (EV_A_ w);
2638		2829
		2830	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2639	if (w->interval < MIN_STAT_INTERVAL)	2831	w->interval = MIN_STAT_INTERVAL;
2640	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2641		2832
2642	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2833	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2643	ev_set_priority (&w->timer, ev_priority (w));	2834	ev_set_priority (&w->timer, ev_priority (w));
2644		2835
2645	#if EV_USE_INOTIFY	2836	#if EV_USE_INOTIFY
2646	infy_init (EV_A);	2837	infy_init (EV_A);
2647		2838
2648	if (fs_fd >= 0)	2839	if (fs_fd >= 0)
2649	infy_add (EV_A_ w);	2840	infy_add (EV_A_ w);
2650	else	2841	else
2651	#endif	2842	#endif
2652	ev_timer_start (EV_A_ &w->timer);	2843	ev_timer_again (EV_A_ &w->timer);
2653		2844
2654	ev_start (EV_A_ (W)w, 1);	2845	ev_start (EV_A_ (W)w, 1);
2655		2846
2656	EV_FREQUENT_CHECK;	2847	EV_FREQUENT_CHECK;
2657	}	2848	}
…		…
2827	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3018	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2828	}	3019	}
2829	}	3020	}
2830	}	3021	}
2831		3022
		3023	static void
		3024	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		3025	{
		3026	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		3027
		3028	ev_embed_stop (EV_A_ w);
		3029
		3030	{
		3031	struct ev_loop *loop = w->other;
		3032
		3033	ev_loop_fork (EV_A);
		3034	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		3035	}
		3036
		3037	ev_embed_start (EV_A_ w);
		3038	}
		3039
2832	#if 0	3040	#if 0
2833	static void	3041	static void
2834	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3042	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2835	{	3043	{
2836	ev_idle_stop (EV_A_ idle);	3044	ev_idle_stop (EV_A_ idle);
…		…
2843	if (expect_false (ev_is_active (w)))	3051	if (expect_false (ev_is_active (w)))
2844	return;	3052	return;
2845		3053
2846	{	3054	{
2847	struct ev_loop *loop = w->other;	3055	struct ev_loop *loop = w->other;
2848	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3056	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2849	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3057	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2850	}	3058	}
2851		3059
2852	EV_FREQUENT_CHECK;	3060	EV_FREQUENT_CHECK;
2853		3061
…		…
2856		3064
2857	ev_prepare_init (&w->prepare, embed_prepare_cb);	3065	ev_prepare_init (&w->prepare, embed_prepare_cb);
2858	ev_set_priority (&w->prepare, EV_MINPRI);	3066	ev_set_priority (&w->prepare, EV_MINPRI);
2859	ev_prepare_start (EV_A_ &w->prepare);	3067	ev_prepare_start (EV_A_ &w->prepare);
2860		3068
		3069	ev_fork_init (&w->fork, embed_fork_cb);
		3070	ev_fork_start (EV_A_ &w->fork);
		3071
2861	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/	3072	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2862		3073
2863	ev_start (EV_A_ (W)w, 1);	3074	ev_start (EV_A_ (W)w, 1);
2864		3075
2865	EV_FREQUENT_CHECK;	3076	EV_FREQUENT_CHECK;
…		…
2872	if (expect_false (!ev_is_active (w)))	3083	if (expect_false (!ev_is_active (w)))
2873	return;	3084	return;
2874		3085
2875	EV_FREQUENT_CHECK;	3086	EV_FREQUENT_CHECK;
2876		3087
2877	ev_io_stop (EV_A_ &w->io);	3088	ev_io_stop (EV_A_ &w->io);
2878	ev_prepare_stop (EV_A_ &w->prepare);	3089	ev_prepare_stop (EV_A_ &w->prepare);
2879		3090	ev_fork_stop (EV_A_ &w->fork);
2880	ev_stop (EV_A_ (W)w);
2881		3091
2882	EV_FREQUENT_CHECK;	3092	EV_FREQUENT_CHECK;
2883	}	3093	}
2884	#endif	3094	#endif
2885		3095
…		…
2992	}	3202	}
2993		3203
2994	static void	3204	static void
2995	once_cb_io (EV_P_ ev_io *w, int revents)	3205	once_cb_io (EV_P_ ev_io *w, int revents)
2996	{	3206	{
2997	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3207	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3208
		3209	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2998	}	3210	}
2999		3211
3000	static void	3212	static void
3001	once_cb_to (EV_P_ ev_timer *w, int revents)	3213	once_cb_to (EV_P_ ev_timer *w, int revents)
3002	{	3214	{
3003	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3215	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3216
		3217	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3004	}	3218	}
3005		3219
3006	void	3220	void
3007	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3221	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3008	{	3222	{
…		…
3030	ev_timer_set (&once->to, timeout, 0.);	3244	ev_timer_set (&once->to, timeout, 0.);
3031	ev_timer_start (EV_A_ &once->to);	3245	ev_timer_start (EV_A_ &once->to);
3032	}	3246	}
3033	}	3247	}
3034		3248
		3249	/*****************************************************************************/
		3250
		3251	#if EV_WALK_ENABLE
		3252	void
		3253	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3254	{
		3255	int i, j;
		3256	ev_watcher_list *wl, *wn;
		3257
		3258	if (types & (EV_IO | EV_EMBED))
		3259	for (i = 0; i < anfdmax; ++i)
		3260	for (wl = anfds [i].head; wl; )
		3261	{
		3262	wn = wl->next;
		3263
		3264	#if EV_EMBED_ENABLE
		3265	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3266	{
		3267	if (types & EV_EMBED)
		3268	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3269	}
		3270	else
		3271	#endif
		3272	#if EV_USE_INOTIFY
		3273	if (ev_cb ((ev_io *)wl) == infy_cb)
		3274	;
		3275	else
		3276	#endif
		3277	if ((ev_io *)wl != &pipe_w)
		3278	if (types & EV_IO)
		3279	cb (EV_A_ EV_IO, wl);
		3280
		3281	wl = wn;
		3282	}
		3283
		3284	if (types & (EV_TIMER | EV_STAT))
		3285	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3286	#if EV_STAT_ENABLE
		3287	/*TODO: timer is not always active*/
		3288	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3289	{
		3290	if (types & EV_STAT)
		3291	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3292	}
		3293	else
		3294	#endif
		3295	if (types & EV_TIMER)
		3296	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3297
		3298	#if EV_PERIODIC_ENABLE
		3299	if (types & EV_PERIODIC)
		3300	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3301	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3302	#endif
		3303
		3304	#if EV_IDLE_ENABLE
		3305	if (types & EV_IDLE)
		3306	for (j = NUMPRI; i--; )
		3307	for (i = idlecnt [j]; i--; )
		3308	cb (EV_A_ EV_IDLE, idles [j][i]);
		3309	#endif
		3310
		3311	#if EV_FORK_ENABLE
		3312	if (types & EV_FORK)
		3313	for (i = forkcnt; i--; )
		3314	if (ev_cb (forks [i]) != embed_fork_cb)
		3315	cb (EV_A_ EV_FORK, forks [i]);
		3316	#endif
		3317
		3318	#if EV_ASYNC_ENABLE
		3319	if (types & EV_ASYNC)
		3320	for (i = asynccnt; i--; )
		3321	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3322	#endif
		3323
		3324	if (types & EV_PREPARE)
		3325	for (i = preparecnt; i--; )
		3326	#if EV_EMBED_ENABLE
		3327	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3328	#endif
		3329	cb (EV_A_ EV_PREPARE, prepares [i]);
		3330
		3331	if (types & EV_CHECK)
		3332	for (i = checkcnt; i--; )
		3333	cb (EV_A_ EV_CHECK, checks [i]);
		3334
		3335	if (types & EV_SIGNAL)
		3336	for (i = 0; i < signalmax; ++i)
		3337	for (wl = signals [i].head; wl; )
		3338	{
		3339	wn = wl->next;
		3340	cb (EV_A_ EV_SIGNAL, wl);
		3341	wl = wn;
		3342	}
		3343
		3344	if (types & EV_CHILD)
		3345	for (i = EV_PID_HASHSIZE; i--; )
		3346	for (wl = childs [i]; wl; )
		3347	{
		3348	wn = wl->next;
		3349	cb (EV_A_ EV_CHILD, wl);
		3350	wl = wn;
		3351	}
		3352	/* EV_STAT 0x00001000 /* stat data changed */
		3353	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3354	}
		3355	#endif
		3356
3035	#if EV_MULTIPLICITY	3357	#if EV_MULTIPLICITY
3036	#include "ev_wrap.h"	3358	#include "ev_wrap.h"
3037	#endif	3359	#endif
3038		3360
3039	#ifdef __cplusplus	3361	#ifdef __cplusplus

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