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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 1.288 by root, Sat Apr 25 14:12:48 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	# endif
		63
52	# if HAVE_CLOCK_GETTIME	64	# if HAVE_CLOCK_GETTIME
53	# ifndef EV_USE_MONOTONIC	65	# ifndef EV_USE_MONOTONIC
54	# define EV_USE_MONOTONIC 1	66	# define EV_USE_MONOTONIC 1
55	# endif	67	# endif
56	# ifndef EV_USE_REALTIME	68	# ifndef EV_USE_REALTIME
57	# define EV_USE_REALTIME 1	69	# define EV_USE_REALTIME 0
58	# endif	70	# endif
59	# else	71	# else
60	# ifndef EV_USE_MONOTONIC	72	# ifndef EV_USE_MONOTONIC
61	# define EV_USE_MONOTONIC 0	73	# define EV_USE_MONOTONIC 0
62	# endif	74	# endif
…		…
164	# endif	176	# endif
165	#endif	177	#endif
166		178
167	/* this block tries to deduce configuration from header-defined symbols and defaults */	179	/* this block tries to deduce configuration from header-defined symbols and defaults */
168		180
		181	#ifndef EV_USE_CLOCK_SYSCALL
		182	# if __linux && __GLIBC__ >= 2
		183	# define EV_USE_CLOCK_SYSCALL 1
		184	# else
		185	# define EV_USE_CLOCK_SYSCALL 0
		186	# endif
		187	#endif
		188
169	#ifndef EV_USE_MONOTONIC	189	#ifndef EV_USE_MONOTONIC
170	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0	190	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171	# define EV_USE_MONOTONIC 1	191	# define EV_USE_MONOTONIC 1
172	# else	192	# else
173	# define EV_USE_MONOTONIC 0	193	# define EV_USE_MONOTONIC 0
174	# endif	194	# endif
175	#endif	195	#endif
176		196
177	#ifndef EV_USE_REALTIME	197	#ifndef EV_USE_REALTIME
178	# define EV_USE_REALTIME 0	198	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
179	#endif	199	#endif
180		200
181	#ifndef EV_USE_NANOSLEEP	201	#ifndef EV_USE_NANOSLEEP
182	# if _POSIX_C_SOURCE >= 199309L	202	# if _POSIX_C_SOURCE >= 199309L
183	# define EV_USE_NANOSLEEP 1	203	# define EV_USE_NANOSLEEP 1
…		…
287	# endif	307	# endif
288	#endif	308	#endif
289		309
290	#if EV_USE_INOTIFY	310	#if EV_USE_INOTIFY
291	# include <sys/utsname.h>	311	# include <sys/utsname.h>
		312	# include <sys/statfs.h>
292	# include <sys/inotify.h>	313	# include <sys/inotify.h>
293	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */	314	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294	# ifndef IN_DONT_FOLLOW	315	# ifndef IN_DONT_FOLLOW
295	# undef EV_USE_INOTIFY	316	# undef EV_USE_INOTIFY
296	# define EV_USE_INOTIFY 0	317	# define EV_USE_INOTIFY 0
297	# endif	318	# endif
298	#endif	319	#endif
299		320
300	#if EV_SELECT_IS_WINSOCKET	321	#if EV_SELECT_IS_WINSOCKET
301	# include <winsock.h>	322	# include <winsock.h>
		323	#endif
		324
		325	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		326	/* which makes programs even slower. might work on other unices, too. */
		327	#if EV_USE_CLOCK_SYSCALL
		328	# include <syscall.h>
		329	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		330	# undef EV_USE_MONOTONIC
		331	# define EV_USE_MONOTONIC 1
302	#endif	332	#endif
303		333
304	#if EV_USE_EVENTFD	334	#if EV_USE_EVENTFD
305	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	335	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306	# include <stdint.h>	336	# include <stdint.h>
…		…
367	typedef ev_watcher_time *WT;	397	typedef ev_watcher_time *WT;
368		398
369	#define ev_active(w) ((W)(w))->active	399	#define ev_active(w) ((W)(w))->active
370	#define ev_at(w) ((WT)(w))->at	400	#define ev_at(w) ((WT)(w))->at
371		401
372	#if EV_USE_MONOTONIC	402	#if EV_USE_REALTIME
373	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	403	/* 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 */	404	/* giving it a reasonably high chance of working on typical architetcures */
		405	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		406	#endif
		407
		408	#if EV_USE_MONOTONIC
375	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	409	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376	#endif	410	#endif
377		411
378	#ifdef _WIN32	412	#ifdef _WIN32
379	# include "ev_win32.c"	413	# include "ev_win32.c"
…		…
388	{	422	{
389	syserr_cb = cb;	423	syserr_cb = cb;
390	}	424	}
391		425
392	static void noinline	426	static void noinline
393	syserr (const char *msg)	427	ev_syserr (const char *msg)
394	{	428	{
395	if (!msg)	429	if (!msg)
396	msg = "(libev) system error";	430	msg = "(libev) system error";
397		431
398	if (syserr_cb)	432	if (syserr_cb)
…		…
444	#define ev_malloc(size) ev_realloc (0, (size))	478	#define ev_malloc(size) ev_realloc (0, (size))
445	#define ev_free(ptr) ev_realloc ((ptr), 0)	479	#define ev_free(ptr) ev_realloc ((ptr), 0)
446		480
447	/*****************************************************************************/	481	/*****************************************************************************/
448		482
		483	/* file descriptor info structure */
449	typedef struct	484	typedef struct
450	{	485	{
451	WL head;	486	WL head;
452	unsigned char events;	487	unsigned char events; /* the events watched for */
		488	unsigned char reify; /* flag set when this ANFD needs reification */
		489	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
453	unsigned char reify;	490	unsigned char unused;
		491	#if EV_USE_EPOLL
		492	unsigned int egen; /* generation counter to counter epoll bugs */
		493	#endif
454	#if EV_SELECT_IS_WINSOCKET	494	#if EV_SELECT_IS_WINSOCKET
455	SOCKET handle;	495	SOCKET handle;
456	#endif	496	#endif
457	} ANFD;	497	} ANFD;
458		498
		499	/* stores the pending event set for a given watcher */
459	typedef struct	500	typedef struct
460	{	501	{
461	W w;	502	W w;
462	int events;	503	int events; /* the pending event set for the given watcher */
463	} ANPENDING;	504	} ANPENDING;
464		505
465	#if EV_USE_INOTIFY	506	#if EV_USE_INOTIFY
466	/* hash table entry per inotify-id */	507	/* hash table entry per inotify-id */
467	typedef struct	508	typedef struct
…		…
470	} ANFS;	511	} ANFS;
471	#endif	512	#endif
472		513
473	/* Heap Entry */	514	/* Heap Entry */
474	#if EV_HEAP_CACHE_AT	515	#if EV_HEAP_CACHE_AT
		516	/* a heap element */
475	typedef struct {	517	typedef struct {
476	ev_tstamp at;	518	ev_tstamp at;
477	WT w;	519	WT w;
478	} ANHE;	520	} ANHE;
479		521
480	#define ANHE_w(he) (he).w /* access watcher, read-write */	522	#define ANHE_w(he) (he).w /* access watcher, read-write */
481	#define ANHE_at(he) (he).at /* access cached at, read-only */	523	#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 */	524	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
483	#else	525	#else
		526	/* a heap element */
484	typedef WT ANHE;	527	typedef WT ANHE;
485		528
486	#define ANHE_w(he) (he)	529	#define ANHE_w(he) (he)
487	#define ANHE_at(he) (he)->at	530	#define ANHE_at(he) (he)->at
488	#define ANHE_at_cache(he)	531	#define ANHE_at_cache(he)
…		…
518		561
519	ev_tstamp	562	ev_tstamp
520	ev_time (void)	563	ev_time (void)
521	{	564	{
522	#if EV_USE_REALTIME	565	#if EV_USE_REALTIME
		566	if (expect_true (have_realtime))
		567	{
523	struct timespec ts;	568	struct timespec ts;
524	clock_gettime (CLOCK_REALTIME, &ts);	569	clock_gettime (CLOCK_REALTIME, &ts);
525	return ts.tv_sec + ts.tv_nsec * 1e-9;	570	return ts.tv_sec + ts.tv_nsec * 1e-9;
526	#else	571	}
		572	#endif
		573
527	struct timeval tv;	574	struct timeval tv;
528	gettimeofday (&tv, 0);	575	gettimeofday (&tv, 0);
529	return tv.tv_sec + tv.tv_usec * 1e-6;	576	return tv.tv_sec + tv.tv_usec * 1e-6;
530	#endif
531	}	577	}
532		578
533	ev_tstamp inline_size	579	inline_size ev_tstamp
534	get_clock (void)	580	get_clock (void)
535	{	581	{
536	#if EV_USE_MONOTONIC	582	#if EV_USE_MONOTONIC
537	if (expect_true (have_monotonic))	583	if (expect_true (have_monotonic))
538	{	584	{
…		…
583		629
584	/*****************************************************************************/	630	/*****************************************************************************/
585		631
586	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	632	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
587		633
588	int inline_size	634	/* find a suitable new size for the given array, */
		635	/* hopefully by rounding to a ncie-to-malloc size */
		636	inline_size int
589	array_nextsize (int elem, int cur, int cnt)	637	array_nextsize (int elem, int cur, int cnt)
590	{	638	{
591	int ncur = cur + 1;	639	int ncur = cur + 1;
592		640
593	do	641	do
…		…
610	array_realloc (int elem, void *base, int *cur, int cnt)	658	array_realloc (int elem, void *base, int *cur, int cnt)
611	{	659	{
612	*cur = array_nextsize (elem, *cur, cnt);	660	*cur = array_nextsize (elem, *cur, cnt);
613	return ev_realloc (base, elem * *cur);	661	return ev_realloc (base, elem * *cur);
614	}	662	}
		663
		664	#define array_init_zero(base,count) \
		665	memset ((void *)(base), 0, sizeof (*(base)) * (count))
615		666
616	#define array_needsize(type,base,cur,cnt,init) \	667	#define array_needsize(type,base,cur,cnt,init) \
617	if (expect_false ((cnt) > (cur))) \	668	if (expect_false ((cnt) > (cur))) \
618	{ \	669	{ \
619	int ocur_ = (cur); \	670	int ocur_ = (cur); \
…		…
631	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	682	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
632	}	683	}
633	#endif	684	#endif
634		685
635	#define array_free(stem, idx) \	686	#define array_free(stem, idx) \
636	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	687	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
637		688
638	/*****************************************************************************/	689	/*****************************************************************************/
		690
		691	/* dummy callback for pending events */
		692	static void noinline
		693	pendingcb (EV_P_ ev_prepare *w, int revents)
		694	{
		695	}
639		696
640	void noinline	697	void noinline
641	ev_feed_event (EV_P_ void *w, int revents)	698	ev_feed_event (EV_P_ void *w, int revents)
642	{	699	{
643	W w_ = (W)w;	700	W w_ = (W)w;
…		…
652	pendings [pri][w_->pending - 1].w = w_;	709	pendings [pri][w_->pending - 1].w = w_;
653	pendings [pri][w_->pending - 1].events = revents;	710	pendings [pri][w_->pending - 1].events = revents;
654	}	711	}
655	}	712	}
656		713
657	void inline_speed	714	inline_speed void
		715	feed_reverse (EV_P_ W w)
		716	{
		717	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		718	rfeeds [rfeedcnt++] = w;
		719	}
		720
		721	inline_size void
		722	feed_reverse_done (EV_P_ int revents)
		723	{
		724	do
		725	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		726	while (rfeedcnt);
		727	}
		728
		729	inline_speed void
658	queue_events (EV_P_ W *events, int eventcnt, int type)	730	queue_events (EV_P_ W *events, int eventcnt, int type)
659	{	731	{
660	int i;	732	int i;
661		733
662	for (i = 0; i < eventcnt; ++i)	734	for (i = 0; i < eventcnt; ++i)
663	ev_feed_event (EV_A_ events [i], type);	735	ev_feed_event (EV_A_ events [i], type);
664	}	736	}
665		737
666	/*****************************************************************************/	738	/*****************************************************************************/
667		739
668	void inline_size	740	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)	741	fd_event (EV_P_ int fd, int revents)
683	{	742	{
684	ANFD *anfd = anfds + fd;	743	ANFD *anfd = anfds + fd;
685	ev_io *w;	744	ev_io *w;
686		745
…		…
698	{	757	{
699	if (fd >= 0 && fd < anfdmax)	758	if (fd >= 0 && fd < anfdmax)
700	fd_event (EV_A_ fd, revents);	759	fd_event (EV_A_ fd, revents);
701	}	760	}
702		761
703	void inline_size	762	/* make sure the external fd watch events are in-sync */
		763	/* with the kernel/libev internal state */
		764	inline_size void
704	fd_reify (EV_P)	765	fd_reify (EV_P)
705	{	766	{
706	int i;	767	int i;
707		768
708	for (i = 0; i < fdchangecnt; ++i)	769	for (i = 0; i < fdchangecnt; ++i)
…		…
723	#ifdef EV_FD_TO_WIN32_HANDLE	784	#ifdef EV_FD_TO_WIN32_HANDLE
724	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	785	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
725	#else	786	#else
726	anfd->handle = _get_osfhandle (fd);	787	anfd->handle = _get_osfhandle (fd);
727	#endif	788	#endif
728	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	789	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
729	}	790	}
730	#endif	791	#endif
731		792
732	{	793	{
733	unsigned char o_events = anfd->events;	794	unsigned char o_events = anfd->events;
734	unsigned char o_reify = anfd->reify;	795	unsigned char o_reify = anfd->reify;
735		796
736	anfd->reify = 0;	797	anfd->reify = 0;
737	anfd->events = events;	798	anfd->events = events;
738		799
739	if (o_events != events || o_reify & EV_IOFDSET)	800	if (o_events != events || o_reify & EV__IOFDSET)
740	backend_modify (EV_A_ fd, o_events, events);	801	backend_modify (EV_A_ fd, o_events, events);
741	}	802	}
742	}	803	}
743		804
744	fdchangecnt = 0;	805	fdchangecnt = 0;
745	}	806	}
746		807
747	void inline_size	808	/* something about the given fd changed */
		809	inline_size void
748	fd_change (EV_P_ int fd, int flags)	810	fd_change (EV_P_ int fd, int flags)
749	{	811	{
750	unsigned char reify = anfds [fd].reify;	812	unsigned char reify = anfds [fd].reify;
751	anfds [fd].reify |= flags;	813	anfds [fd].reify |= flags;
752		814
…		…
756	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	818	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
757	fdchanges [fdchangecnt - 1] = fd;	819	fdchanges [fdchangecnt - 1] = fd;
758	}	820	}
759	}	821	}
760		822
761	void inline_speed	823	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		824	inline_speed void
762	fd_kill (EV_P_ int fd)	825	fd_kill (EV_P_ int fd)
763	{	826	{
764	ev_io *w;	827	ev_io *w;
765		828
766	while ((w = (ev_io *)anfds [fd].head))	829	while ((w = (ev_io *)anfds [fd].head))
…		…
768	ev_io_stop (EV_A_ w);	831	ev_io_stop (EV_A_ w);
769	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	832	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
770	}	833	}
771	}	834	}
772		835
773	int inline_size	836	/* check whether the given fd is atcually valid, for error recovery */
		837	inline_size int
774	fd_valid (int fd)	838	fd_valid (int fd)
775	{	839	{
776	#ifdef _WIN32	840	#ifdef _WIN32
777	return _get_osfhandle (fd) != -1;	841	return _get_osfhandle (fd) != -1;
778	#else	842	#else
…		…
814		878
815	for (fd = 0; fd < anfdmax; ++fd)	879	for (fd = 0; fd < anfdmax; ++fd)
816	if (anfds [fd].events)	880	if (anfds [fd].events)
817	{	881	{
818	anfds [fd].events = 0;	882	anfds [fd].events = 0;
		883	anfds [fd].emask = 0;
819	fd_change (EV_A_ fd, EV_IOFDSET | 1);	884	fd_change (EV_A_ fd, EV__IOFDSET | 1);
820	}	885	}
821	}	886	}
822		887
823	/*****************************************************************************/	888	/*****************************************************************************/
824		889
…		…
840	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	905	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
841	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	906	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
842	#define UPHEAP_DONE(p,k) ((p) == (k))	907	#define UPHEAP_DONE(p,k) ((p) == (k))
843		908
844	/* away from the root */	909	/* away from the root */
845	void inline_speed	910	inline_speed void
846	downheap (ANHE *heap, int N, int k)	911	downheap (ANHE *heap, int N, int k)
847	{	912	{
848	ANHE he = heap [k];	913	ANHE he = heap [k];
849	ANHE *E = heap + N + HEAP0;	914	ANHE *E = heap + N + HEAP0;
850		915
…		…
890	#define HEAP0 1	955	#define HEAP0 1
891	#define HPARENT(k) ((k) >> 1)	956	#define HPARENT(k) ((k) >> 1)
892	#define UPHEAP_DONE(p,k) (!(p))	957	#define UPHEAP_DONE(p,k) (!(p))
893		958
894	/* away from the root */	959	/* away from the root */
895	void inline_speed	960	inline_speed void
896	downheap (ANHE *heap, int N, int k)	961	downheap (ANHE *heap, int N, int k)
897	{	962	{
898	ANHE he = heap [k];	963	ANHE he = heap [k];
899		964
900	for (;;)	965	for (;;)
…		…
920	ev_active (ANHE_w (he)) = k;	985	ev_active (ANHE_w (he)) = k;
921	}	986	}
922	#endif	987	#endif
923		988
924	/* towards the root */	989	/* towards the root */
925	void inline_speed	990	inline_speed void
926	upheap (ANHE *heap, int k)	991	upheap (ANHE *heap, int k)
927	{	992	{
928	ANHE he = heap [k];	993	ANHE he = heap [k];
929		994
930	for (;;)	995	for (;;)
…		…
941		1006
942	heap [k] = he;	1007	heap [k] = he;
943	ev_active (ANHE_w (he)) = k;	1008	ev_active (ANHE_w (he)) = k;
944	}	1009	}
945		1010
946	void inline_size	1011	/* move an element suitably so it is in a correct place */
		1012	inline_size void
947	adjustheap (ANHE *heap, int N, int k)	1013	adjustheap (ANHE *heap, int N, int k)
948	{	1014	{
949	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1015	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
950	upheap (heap, k);	1016	upheap (heap, k);
951	else	1017	else
952	downheap (heap, N, k);	1018	downheap (heap, N, k);
953	}	1019	}
954		1020
955	/* rebuild the heap: this function is used only once and executed rarely */	1021	/* rebuild the heap: this function is used only once and executed rarely */
956	void inline_size	1022	inline_size void
957	reheap (ANHE *heap, int N)	1023	reheap (ANHE *heap, int N)
958	{	1024	{
959	int i;	1025	int i;
960		1026
961	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1027	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
964	upheap (heap, i + HEAP0);	1030	upheap (heap, i + HEAP0);
965	}	1031	}
966		1032
967	/*****************************************************************************/	1033	/*****************************************************************************/
968		1034
		1035	/* associate signal watchers to a signal signal */
969	typedef struct	1036	typedef struct
970	{	1037	{
971	WL head;	1038	WL head;
972	EV_ATOMIC_T gotsig;	1039	EV_ATOMIC_T gotsig;
973	} ANSIG;	1040	} ANSIG;
…		…
975	static ANSIG *signals;	1042	static ANSIG *signals;
976	static int signalmax;	1043	static int signalmax;
977		1044
978	static EV_ATOMIC_T gotsig;	1045	static EV_ATOMIC_T gotsig;
979		1046
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	/*****************************************************************************/	1047	/*****************************************************************************/
993		1048
994	void inline_speed	1049	/* used to prepare libev internal fd's */
		1050	/* this is not fork-safe */
		1051	inline_speed void
995	fd_intern (int fd)	1052	fd_intern (int fd)
996	{	1053	{
997	#ifdef _WIN32	1054	#ifdef _WIN32
998	unsigned long arg = 1;	1055	unsigned long arg = 1;
999	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1056	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
1004	}	1061	}
1005		1062
1006	static void noinline	1063	static void noinline
1007	evpipe_init (EV_P)	1064	evpipe_init (EV_P)
1008	{	1065	{
1009	if (!ev_is_active (&pipeev))	1066	if (!ev_is_active (&pipe_w))
1010	{	1067	{
1011	#if EV_USE_EVENTFD	1068	#if EV_USE_EVENTFD
1012	if ((evfd = eventfd (0, 0)) >= 0)	1069	if ((evfd = eventfd (0, 0)) >= 0)
1013	{	1070	{
1014	evpipe [0] = -1;	1071	evpipe [0] = -1;
1015	fd_intern (evfd);	1072	fd_intern (evfd);
1016	ev_io_set (&pipeev, evfd, EV_READ);	1073	ev_io_set (&pipe_w, evfd, EV_READ);
1017	}	1074	}
1018	else	1075	else
1019	#endif	1076	#endif
1020	{	1077	{
1021	while (pipe (evpipe))	1078	while (pipe (evpipe))
1022	syserr ("(libev) error creating signal/async pipe");	1079	ev_syserr ("(libev) error creating signal/async pipe");
1023		1080
1024	fd_intern (evpipe [0]);	1081	fd_intern (evpipe [0]);
1025	fd_intern (evpipe [1]);	1082	fd_intern (evpipe [1]);
1026	ev_io_set (&pipeev, evpipe [0], EV_READ);	1083	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1027	}	1084	}
1028		1085
1029	ev_io_start (EV_A_ &pipeev);	1086	ev_io_start (EV_A_ &pipe_w);
1030	ev_unref (EV_A); /* watcher should not keep loop alive */	1087	ev_unref (EV_A); /* watcher should not keep loop alive */
1031	}	1088	}
1032	}	1089	}
1033		1090
1034	void inline_size	1091	inline_size void
1035	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1092	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1036	{	1093	{
1037	if (!*flag)	1094	if (!*flag)
1038	{	1095	{
1039	int old_errno = errno; /* save errno because write might clobber it */	1096	int old_errno = errno; /* save errno because write might clobber it */
…		…
1052		1109
1053	errno = old_errno;	1110	errno = old_errno;
1054	}	1111	}
1055	}	1112	}
1056		1113
		1114	/* called whenever the libev signal pipe */
		1115	/* got some events (signal, async) */
1057	static void	1116	static void
1058	pipecb (EV_P_ ev_io *iow, int revents)	1117	pipecb (EV_P_ ev_io *iow, int revents)
1059	{	1118	{
1060	#if EV_USE_EVENTFD	1119	#if EV_USE_EVENTFD
1061	if (evfd >= 0)	1120	if (evfd >= 0)
…		…
1117	ev_feed_signal_event (EV_P_ int signum)	1176	ev_feed_signal_event (EV_P_ int signum)
1118	{	1177	{
1119	WL w;	1178	WL w;
1120		1179
1121	#if EV_MULTIPLICITY	1180	#if EV_MULTIPLICITY
1122	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1181	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1123	#endif	1182	#endif
1124		1183
1125	--signum;	1184	--signum;
1126		1185
1127	if (signum < 0 || signum >= signalmax)	1186	if (signum < 0 || signum >= signalmax)
…		…
1143		1202
1144	#ifndef WIFCONTINUED	1203	#ifndef WIFCONTINUED
1145	# define WIFCONTINUED(status) 0	1204	# define WIFCONTINUED(status) 0
1146	#endif	1205	#endif
1147		1206
1148	void inline_speed	1207	/* handle a single child status event */
		1208	inline_speed void
1149	child_reap (EV_P_ int chain, int pid, int status)	1209	child_reap (EV_P_ int chain, int pid, int status)
1150	{	1210	{
1151	ev_child *w;	1211	ev_child *w;
1152	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1212	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1153		1213
…		…
1166		1226
1167	#ifndef WCONTINUED	1227	#ifndef WCONTINUED
1168	# define WCONTINUED 0	1228	# define WCONTINUED 0
1169	#endif	1229	#endif
1170		1230
		1231	/* called on sigchld etc., calls waitpid */
1171	static void	1232	static void
1172	childcb (EV_P_ ev_signal *sw, int revents)	1233	childcb (EV_P_ ev_signal *sw, int revents)
1173	{	1234	{
1174	int pid, status;	1235	int pid, status;
1175		1236
…		…
1256	/* kqueue is borked on everything but netbsd apparently */	1317	/* kqueue is borked on everything but netbsd apparently */
1257	/* it usually doesn't work correctly on anything but sockets and pipes */	1318	/* it usually doesn't work correctly on anything but sockets and pipes */
1258	flags &= ~EVBACKEND_KQUEUE;	1319	flags &= ~EVBACKEND_KQUEUE;
1259	#endif	1320	#endif
1260	#ifdef __APPLE__	1321	#ifdef __APPLE__
1261	// flags &= ~EVBACKEND_KQUEUE; for documentation	1322	/* only select works correctly on that "unix-certified" platform */
1262	flags &= ~EVBACKEND_POLL;	1323	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1324	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1263	#endif	1325	#endif
1264		1326
1265	return flags;	1327	return flags;
1266	}	1328	}
1267		1329
…		…
1299	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1361	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1300	{	1362	{
1301	timeout_blocktime = interval;	1363	timeout_blocktime = interval;
1302	}	1364	}
1303		1365
		1366	/* initialise a loop structure, must be zero-initialised */
1304	static void noinline	1367	static void noinline
1305	loop_init (EV_P_ unsigned int flags)	1368	loop_init (EV_P_ unsigned int flags)
1306	{	1369	{
1307	if (!backend)	1370	if (!backend)
1308	{	1371	{
		1372	#if EV_USE_REALTIME
		1373	if (!have_realtime)
		1374	{
		1375	struct timespec ts;
		1376
		1377	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1378	have_realtime = 1;
		1379	}
		1380	#endif
		1381
1309	#if EV_USE_MONOTONIC	1382	#if EV_USE_MONOTONIC
		1383	if (!have_monotonic)
1310	{	1384	{
1311	struct timespec ts;	1385	struct timespec ts;
		1386
1312	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1387	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1313	have_monotonic = 1;	1388	have_monotonic = 1;
1314	}	1389	}
1315	#endif	1390	#endif
1316		1391
1317	ev_rt_now = ev_time ();	1392	ev_rt_now = ev_time ();
1318	mn_now = get_clock ();	1393	mn_now = get_clock ();
1319	now_floor = mn_now;	1394	now_floor = mn_now;
…		…
1356	#endif	1431	#endif
1357	#if EV_USE_SELECT	1432	#if EV_USE_SELECT
1358	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1433	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1359	#endif	1434	#endif
1360		1435
		1436	ev_prepare_init (&pending_w, pendingcb);
		1437
1361	ev_init (&pipeev, pipecb);	1438	ev_init (&pipe_w, pipecb);
1362	ev_set_priority (&pipeev, EV_MAXPRI);	1439	ev_set_priority (&pipe_w, EV_MAXPRI);
1363	}	1440	}
1364	}	1441	}
1365		1442
		1443	/* free up a loop structure */
1366	static void noinline	1444	static void noinline
1367	loop_destroy (EV_P)	1445	loop_destroy (EV_P)
1368	{	1446	{
1369	int i;	1447	int i;
1370		1448
1371	if (ev_is_active (&pipeev))	1449	if (ev_is_active (&pipe_w))
1372	{	1450	{
1373	ev_ref (EV_A); /* signal watcher */	1451	ev_ref (EV_A); /* signal watcher */
1374	ev_io_stop (EV_A_ &pipeev);	1452	ev_io_stop (EV_A_ &pipe_w);
1375		1453
1376	#if EV_USE_EVENTFD	1454	#if EV_USE_EVENTFD
1377	if (evfd >= 0)	1455	if (evfd >= 0)
1378	close (evfd);	1456	close (evfd);
1379	#endif	1457	#endif
…		…
1418	}	1496	}
1419		1497
1420	ev_free (anfds); anfdmax = 0;	1498	ev_free (anfds); anfdmax = 0;
1421		1499
1422	/* have to use the microsoft-never-gets-it-right macro */	1500	/* have to use the microsoft-never-gets-it-right macro */
		1501	array_free (rfeed, EMPTY);
1423	array_free (fdchange, EMPTY);	1502	array_free (fdchange, EMPTY);
1424	array_free (timer, EMPTY);	1503	array_free (timer, EMPTY);
1425	#if EV_PERIODIC_ENABLE	1504	#if EV_PERIODIC_ENABLE
1426	array_free (periodic, EMPTY);	1505	array_free (periodic, EMPTY);
1427	#endif	1506	#endif
…		…
1436		1515
1437	backend = 0;	1516	backend = 0;
1438	}	1517	}
1439		1518
1440	#if EV_USE_INOTIFY	1519	#if EV_USE_INOTIFY
1441	void inline_size infy_fork (EV_P);	1520	inline_size void infy_fork (EV_P);
1442	#endif	1521	#endif
1443		1522
1444	void inline_size	1523	inline_size void
1445	loop_fork (EV_P)	1524	loop_fork (EV_P)
1446	{	1525	{
1447	#if EV_USE_PORT	1526	#if EV_USE_PORT
1448	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1527	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1449	#endif	1528	#endif
…		…
1455	#endif	1534	#endif
1456	#if EV_USE_INOTIFY	1535	#if EV_USE_INOTIFY
1457	infy_fork (EV_A);	1536	infy_fork (EV_A);
1458	#endif	1537	#endif
1459		1538
1460	if (ev_is_active (&pipeev))	1539	if (ev_is_active (&pipe_w))
1461	{	1540	{
1462	/* this "locks" the handlers against writing to the pipe */	1541	/* this "locks" the handlers against writing to the pipe */
1463	/* while we modify the fd vars */	1542	/* while we modify the fd vars */
1464	gotsig = 1;	1543	gotsig = 1;
1465	#if EV_ASYNC_ENABLE	1544	#if EV_ASYNC_ENABLE
1466	gotasync = 1;	1545	gotasync = 1;
1467	#endif	1546	#endif
1468		1547
1469	ev_ref (EV_A);	1548	ev_ref (EV_A);
1470	ev_io_stop (EV_A_ &pipeev);	1549	ev_io_stop (EV_A_ &pipe_w);
1471		1550
1472	#if EV_USE_EVENTFD	1551	#if EV_USE_EVENTFD
1473	if (evfd >= 0)	1552	if (evfd >= 0)
1474	close (evfd);	1553	close (evfd);
1475	#endif	1554	#endif
…		…
1480	close (evpipe [1]);	1559	close (evpipe [1]);
1481	}	1560	}
1482		1561
1483	evpipe_init (EV_A);	1562	evpipe_init (EV_A);
1484	/* now iterate over everything, in case we missed something */	1563	/* now iterate over everything, in case we missed something */
1485	pipecb (EV_A_ &pipeev, EV_READ);	1564	pipecb (EV_A_ &pipe_w, EV_READ);
1486	}	1565	}
1487		1566
1488	postfork = 0;	1567	postfork = 0;
1489	}	1568	}
1490		1569
…		…
1520		1599
1521	#if EV_VERIFY	1600	#if EV_VERIFY
1522	static void noinline	1601	static void noinline
1523	verify_watcher (EV_P_ W w)	1602	verify_watcher (EV_P_ W w)
1524	{	1603	{
1525	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1604	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1526		1605
1527	if (w->pending)	1606	if (w->pending)
1528	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	1607	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1529	}	1608	}
1530		1609
1531	static void noinline	1610	static void noinline
1532	verify_heap (EV_P_ ANHE *heap, int N)	1611	verify_heap (EV_P_ ANHE *heap, int N)
1533	{	1612	{
1534	int i;	1613	int i;
1535		1614
1536	for (i = HEAP0; i < N + HEAP0; ++i)	1615	for (i = HEAP0; i < N + HEAP0; ++i)
1537	{	1616	{
1538	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));	1617	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])));	1618	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]))));	1619	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1541		1620
1542	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1621	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1543	}	1622	}
1544	}	1623	}
1545		1624
1546	static void noinline	1625	static void noinline
1547	array_verify (EV_P_ W *ws, int cnt)	1626	array_verify (EV_P_ W *ws, int cnt)
1548	{	1627	{
1549	while (cnt--)	1628	while (cnt--)
1550	{	1629	{
1551	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1630	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1552	verify_watcher (EV_A_ ws [cnt]);	1631	verify_watcher (EV_A_ ws [cnt]);
1553	}	1632	}
1554	}	1633	}
1555	#endif	1634	#endif
1556		1635
…		…
1563		1642
1564	assert (activecnt >= -1);	1643	assert (activecnt >= -1);
1565		1644
1566	assert (fdchangemax >= fdchangecnt);	1645	assert (fdchangemax >= fdchangecnt);
1567	for (i = 0; i < fdchangecnt; ++i)	1646	for (i = 0; i < fdchangecnt; ++i)
1568	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1647	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1569		1648
1570	assert (anfdmax >= 0);	1649	assert (anfdmax >= 0);
1571	for (i = 0; i < anfdmax; ++i)	1650	for (i = 0; i < anfdmax; ++i)
1572	for (w = anfds [i].head; w; w = w->next)	1651	for (w = anfds [i].head; w; w = w->next)
1573	{	1652	{
1574	verify_watcher (EV_A_ (W)w);	1653	verify_watcher (EV_A_ (W)w);
1575	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1654	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));	1655	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1577	}	1656	}
1578		1657
1579	assert (timermax >= timercnt);	1658	assert (timermax >= timercnt);
1580	verify_heap (EV_A_ timers, timercnt);	1659	verify_heap (EV_A_ timers, timercnt);
1581		1660
…		…
1658	{	1737	{
1659	#if EV_MULTIPLICITY	1738	#if EV_MULTIPLICITY
1660	struct ev_loop *loop = ev_default_loop_ptr;	1739	struct ev_loop *loop = ev_default_loop_ptr;
1661	#endif	1740	#endif
1662		1741
		1742	ev_default_loop_ptr = 0;
		1743
1663	#ifndef _WIN32	1744	#ifndef _WIN32
1664	ev_ref (EV_A); /* child watcher */	1745	ev_ref (EV_A); /* child watcher */
1665	ev_signal_stop (EV_A_ &childev);	1746	ev_signal_stop (EV_A_ &childev);
1666	#endif	1747	#endif
1667		1748
…		…
1673	{	1754	{
1674	#if EV_MULTIPLICITY	1755	#if EV_MULTIPLICITY
1675	struct ev_loop *loop = ev_default_loop_ptr;	1756	struct ev_loop *loop = ev_default_loop_ptr;
1676	#endif	1757	#endif
1677		1758
1678	if (backend)
1679	postfork = 1; /* must be in line with ev_loop_fork */	1759	postfork = 1; /* must be in line with ev_loop_fork */
1680	}	1760	}
1681		1761
1682	/*****************************************************************************/	1762	/*****************************************************************************/
1683		1763
1684	void	1764	void
1685	ev_invoke (EV_P_ void *w, int revents)	1765	ev_invoke (EV_P_ void *w, int revents)
1686	{	1766	{
1687	EV_CB_INVOKE ((W)w, revents);	1767	EV_CB_INVOKE ((W)w, revents);
1688	}	1768	}
1689		1769
1690	void inline_speed	1770	inline_speed void
1691	call_pending (EV_P)	1771	call_pending (EV_P)
1692	{	1772	{
1693	int pri;	1773	int pri;
1694		1774
1695	for (pri = NUMPRI; pri--; )	1775	for (pri = NUMPRI; pri--; )
1696	while (pendingcnt [pri])	1776	while (pendingcnt [pri])
1697	{	1777	{
1698	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1778	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1699		1779
1700	if (expect_true (p->w))
1701	{
1702	/*assert (("non-pending watcher on pending list", p->w->pending));*/	1780	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1781	/* ^ this is no longer true, as pending_w could be here */
1703		1782
1704	p->w->pending = 0;	1783	p->w->pending = 0;
1705	EV_CB_INVOKE (p->w, p->events);	1784	EV_CB_INVOKE (p->w, p->events);
1706	EV_FREQUENT_CHECK;	1785	EV_FREQUENT_CHECK;
1707	}
1708	}	1786	}
1709	}	1787	}
1710		1788
1711	#if EV_IDLE_ENABLE	1789	#if EV_IDLE_ENABLE
1712	void inline_size	1790	/* make idle watchers pending. this handles the "call-idle */
		1791	/* only when higher priorities are idle" logic */
		1792	inline_size void
1713	idle_reify (EV_P)	1793	idle_reify (EV_P)
1714	{	1794	{
1715	if (expect_false (idleall))	1795	if (expect_false (idleall))
1716	{	1796	{
1717	int pri;	1797	int pri;
…		…
1729	}	1809	}
1730	}	1810	}
1731	}	1811	}
1732	#endif	1812	#endif
1733		1813
1734	void inline_size	1814	/* make timers pending */
		1815	inline_size void
1735	timers_reify (EV_P)	1816	timers_reify (EV_P)
1736	{	1817	{
1737	EV_FREQUENT_CHECK;	1818	EV_FREQUENT_CHECK;
1738		1819
1739	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1820	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1740	{	1821	{
1741	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1822	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	{	1823	{
		1824	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1825
		1826	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1827
		1828	/* first reschedule or stop timer */
		1829	if (w->repeat)
		1830	{
1748	ev_at (w) += w->repeat;	1831	ev_at (w) += w->repeat;
1749	if (ev_at (w) < mn_now)	1832	if (ev_at (w) < mn_now)
1750	ev_at (w) = mn_now;	1833	ev_at (w) = mn_now;
1751		1834
1752	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1835	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1753		1836
1754	ANHE_at_cache (timers [HEAP0]);	1837	ANHE_at_cache (timers [HEAP0]);
1755	downheap (timers, timercnt, HEAP0);	1838	downheap (timers, timercnt, HEAP0);
		1839	}
		1840	else
		1841	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1842
		1843	EV_FREQUENT_CHECK;
		1844	feed_reverse (EV_A_ (W)w);
1756	}	1845	}
1757	else	1846	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1758	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1759		1847
1760	EV_FREQUENT_CHECK;
1761	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1848	feed_reverse_done (EV_A_ EV_TIMEOUT);
1762	}	1849	}
1763	}	1850	}
1764		1851
1765	#if EV_PERIODIC_ENABLE	1852	#if EV_PERIODIC_ENABLE
1766	void inline_size	1853	/* make periodics pending */
		1854	inline_size void
1767	periodics_reify (EV_P)	1855	periodics_reify (EV_P)
1768	{	1856	{
1769	EV_FREQUENT_CHECK;	1857	EV_FREQUENT_CHECK;
1770		1858
1771	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1859	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1772	{	1860	{
1773	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1861	int feed_count = 0;
1774		1862
1775	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1863	do
1776
1777	/* first reschedule or stop timer */
1778	if (w->reschedule_cb)
1779	{	1864	{
		1865	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1866
		1867	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		1868
		1869	/* first reschedule or stop timer */
		1870	if (w->reschedule_cb)
		1871	{
1780	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1872	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1781		1873
1782	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1874	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1783		1875
1784	ANHE_at_cache (periodics [HEAP0]);	1876	ANHE_at_cache (periodics [HEAP0]);
1785	downheap (periodics, periodiccnt, HEAP0);	1877	downheap (periodics, periodiccnt, HEAP0);
		1878	}
		1879	else if (w->interval)
		1880	{
		1881	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1882	/* if next trigger time is not sufficiently in the future, put it there */
		1883	/* this might happen because of floating point inexactness */
		1884	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1885	{
		1886	ev_at (w) += w->interval;
		1887
		1888	/* if interval is unreasonably low we might still have a time in the past */
		1889	/* so correct this. this will make the periodic very inexact, but the user */
		1890	/* has effectively asked to get triggered more often than possible */
		1891	if (ev_at (w) < ev_rt_now)
		1892	ev_at (w) = ev_rt_now;
		1893	}
		1894
		1895	ANHE_at_cache (periodics [HEAP0]);
		1896	downheap (periodics, periodiccnt, HEAP0);
		1897	}
		1898	else
		1899	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1900
		1901	EV_FREQUENT_CHECK;
		1902	feed_reverse (EV_A_ (W)w);
1786	}	1903	}
1787	else if (w->interval)	1904	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		1905
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);	1906	feed_reverse_done (EV_A_ EV_PERIODIC);
1811	}	1907	}
1812	}	1908	}
1813		1909
		1910	/* simply recalculate all periodics */
		1911	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1814	static void noinline	1912	static void noinline
1815	periodics_reschedule (EV_P)	1913	periodics_reschedule (EV_P)
1816	{	1914	{
1817	int i;	1915	int i;
1818		1916
…		…
1831		1929
1832	reheap (periodics, periodiccnt);	1930	reheap (periodics, periodiccnt);
1833	}	1931	}
1834	#endif	1932	#endif
1835		1933
1836	void inline_speed	1934	/* adjust all timers by a given offset */
		1935	static void noinline
		1936	timers_reschedule (EV_P_ ev_tstamp adjust)
		1937	{
		1938	int i;
		1939
		1940	for (i = 0; i < timercnt; ++i)
		1941	{
		1942	ANHE *he = timers + i + HEAP0;
		1943	ANHE_w (*he)->at += adjust;
		1944	ANHE_at_cache (*he);
		1945	}
		1946	}
		1947
		1948	/* fetch new monotonic and realtime times from the kernel */
		1949	/* also detetc if there was a timejump, and act accordingly */
		1950	inline_speed void
1837	time_update (EV_P_ ev_tstamp max_block)	1951	time_update (EV_P_ ev_tstamp max_block)
1838	{	1952	{
1839	int i;	1953	int i;
1840		1954
1841	#if EV_USE_MONOTONIC	1955	#if EV_USE_MONOTONIC
…		…
1874	ev_rt_now = ev_time ();	1988	ev_rt_now = ev_time ();
1875	mn_now = get_clock ();	1989	mn_now = get_clock ();
1876	now_floor = mn_now;	1990	now_floor = mn_now;
1877	}	1991	}
1878		1992
		1993	/* no timer adjustment, as the monotonic clock doesn't jump */
		1994	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1879	# if EV_PERIODIC_ENABLE	1995	# if EV_PERIODIC_ENABLE
1880	periodics_reschedule (EV_A);	1996	periodics_reschedule (EV_A);
1881	# endif	1997	# endif
1882	/* no timer adjustment, as the monotonic clock doesn't jump */
1883	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1884	}	1998	}
1885	else	1999	else
1886	#endif	2000	#endif
1887	{	2001	{
1888	ev_rt_now = ev_time ();	2002	ev_rt_now = ev_time ();
1889		2003
1890	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2004	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1891	{	2005	{
		2006	/* adjust timers. this is easy, as the offset is the same for all of them */
		2007	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1892	#if EV_PERIODIC_ENABLE	2008	#if EV_PERIODIC_ENABLE
1893	periodics_reschedule (EV_A);	2009	periodics_reschedule (EV_A);
1894	#endif	2010	#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	}	2011	}
1903		2012
1904	mn_now = ev_rt_now;	2013	mn_now = ev_rt_now;
1905	}	2014	}
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	}	2015	}
1925		2016
1926	static int loop_done;	2017	static int loop_done;
1927		2018
1928	void	2019	void
…		…
1962	{	2053	{
1963	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2054	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1964	call_pending (EV_A);	2055	call_pending (EV_A);
1965	}	2056	}
1966		2057
1967	if (expect_false (!activecnt))
1968	break;
1969
1970	/* we might have forked, so reify kernel state if necessary */	2058	/* we might have forked, so reify kernel state if necessary */
1971	if (expect_false (postfork))	2059	if (expect_false (postfork))
1972	loop_fork (EV_A);	2060	loop_fork (EV_A);
1973		2061
1974	/* update fd-related kernel structures */	2062	/* update fd-related kernel structures */
…		…
2053	ev_unloop (EV_P_ int how)	2141	ev_unloop (EV_P_ int how)
2054	{	2142	{
2055	loop_done = how;	2143	loop_done = how;
2056	}	2144	}
2057		2145
		2146	void
		2147	ev_ref (EV_P)
		2148	{
		2149	++activecnt;
		2150	}
		2151
		2152	void
		2153	ev_unref (EV_P)
		2154	{
		2155	--activecnt;
		2156	}
		2157
		2158	void
		2159	ev_now_update (EV_P)
		2160	{
		2161	time_update (EV_A_ 1e100);
		2162	}
		2163
		2164	void
		2165	ev_suspend (EV_P)
		2166	{
		2167	ev_now_update (EV_A);
		2168	}
		2169
		2170	void
		2171	ev_resume (EV_P)
		2172	{
		2173	ev_tstamp mn_prev = mn_now;
		2174
		2175	ev_now_update (EV_A);
		2176	timers_reschedule (EV_A_ mn_now - mn_prev);
		2177	#if EV_PERIODIC_ENABLE
		2178	/* TODO: really do this? */
		2179	periodics_reschedule (EV_A);
		2180	#endif
		2181	}
		2182
2058	/*****************************************************************************/	2183	/*****************************************************************************/
		2184	/* singly-linked list management, used when the expected list length is short */
2059		2185
2060	void inline_size	2186	inline_size void
2061	wlist_add (WL *head, WL elem)	2187	wlist_add (WL *head, WL elem)
2062	{	2188	{
2063	elem->next = *head;	2189	elem->next = *head;
2064	*head = elem;	2190	*head = elem;
2065	}	2191	}
2066		2192
2067	void inline_size	2193	inline_size void
2068	wlist_del (WL *head, WL elem)	2194	wlist_del (WL *head, WL elem)
2069	{	2195	{
2070	while (*head)	2196	while (*head)
2071	{	2197	{
2072	if (*head == elem)	2198	if (*head == elem)
…		…
2077		2203
2078	head = &(*head)->next;	2204	head = &(*head)->next;
2079	}	2205	}
2080	}	2206	}
2081		2207
2082	void inline_speed	2208	/* internal, faster, version of ev_clear_pending */
		2209	inline_speed void
2083	clear_pending (EV_P_ W w)	2210	clear_pending (EV_P_ W w)
2084	{	2211	{
2085	if (w->pending)	2212	if (w->pending)
2086	{	2213	{
2087	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2214	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2088	w->pending = 0;	2215	w->pending = 0;
2089	}	2216	}
2090	}	2217	}
2091		2218
2092	int	2219	int
…		…
2096	int pending = w_->pending;	2223	int pending = w_->pending;
2097		2224
2098	if (expect_true (pending))	2225	if (expect_true (pending))
2099	{	2226	{
2100	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2227	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2228	p->w = (W)&pending_w;
2101	w_->pending = 0;	2229	w_->pending = 0;
2102	p->w = 0;
2103	return p->events;	2230	return p->events;
2104	}	2231	}
2105	else	2232	else
2106	return 0;	2233	return 0;
2107	}	2234	}
2108		2235
2109	void inline_size	2236	inline_size void
2110	pri_adjust (EV_P_ W w)	2237	pri_adjust (EV_P_ W w)
2111	{	2238	{
2112	int pri = w->priority;	2239	int pri = w->priority;
2113	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2240	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2114	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2241	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2115	w->priority = pri;	2242	w->priority = pri;
2116	}	2243	}
2117		2244
2118	void inline_speed	2245	inline_speed void
2119	ev_start (EV_P_ W w, int active)	2246	ev_start (EV_P_ W w, int active)
2120	{	2247	{
2121	pri_adjust (EV_A_ w);	2248	pri_adjust (EV_A_ w);
2122	w->active = active;	2249	w->active = active;
2123	ev_ref (EV_A);	2250	ev_ref (EV_A);
2124	}	2251	}
2125		2252
2126	void inline_size	2253	inline_size void
2127	ev_stop (EV_P_ W w)	2254	ev_stop (EV_P_ W w)
2128	{	2255	{
2129	ev_unref (EV_A);	2256	ev_unref (EV_A);
2130	w->active = 0;	2257	w->active = 0;
2131	}	2258	}
…		…
2138	int fd = w->fd;	2265	int fd = w->fd;
2139		2266
2140	if (expect_false (ev_is_active (w)))	2267	if (expect_false (ev_is_active (w)))
2141	return;	2268	return;
2142		2269
2143	assert (("ev_io_start called with negative fd", fd >= 0));	2270	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2271	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2144		2272
2145	EV_FREQUENT_CHECK;	2273	EV_FREQUENT_CHECK;
2146		2274
2147	ev_start (EV_A_ (W)w, 1);	2275	ev_start (EV_A_ (W)w, 1);
2148	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2276	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2149	wlist_add (&anfds[fd].head, (WL)w);	2277	wlist_add (&anfds[fd].head, (WL)w);
2150		2278
2151	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2279	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2152	w->events &= ~EV_IOFDSET;	2280	w->events &= ~EV__IOFDSET;
2153		2281
2154	EV_FREQUENT_CHECK;	2282	EV_FREQUENT_CHECK;
2155	}	2283	}
2156		2284
2157	void noinline	2285	void noinline
…		…
2159	{	2287	{
2160	clear_pending (EV_A_ (W)w);	2288	clear_pending (EV_A_ (W)w);
2161	if (expect_false (!ev_is_active (w)))	2289	if (expect_false (!ev_is_active (w)))
2162	return;	2290	return;
2163		2291
2164	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2292	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2165		2293
2166	EV_FREQUENT_CHECK;	2294	EV_FREQUENT_CHECK;
2167		2295
2168	wlist_del (&anfds[w->fd].head, (WL)w);	2296	wlist_del (&anfds[w->fd].head, (WL)w);
2169	ev_stop (EV_A_ (W)w);	2297	ev_stop (EV_A_ (W)w);
…		…
2179	if (expect_false (ev_is_active (w)))	2307	if (expect_false (ev_is_active (w)))
2180	return;	2308	return;
2181		2309
2182	ev_at (w) += mn_now;	2310	ev_at (w) += mn_now;
2183		2311
2184	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2312	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2185		2313
2186	EV_FREQUENT_CHECK;	2314	EV_FREQUENT_CHECK;
2187		2315
2188	++timercnt;	2316	++timercnt;
2189	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2317	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2192	ANHE_at_cache (timers [ev_active (w)]);	2320	ANHE_at_cache (timers [ev_active (w)]);
2193	upheap (timers, ev_active (w));	2321	upheap (timers, ev_active (w));
2194		2322
2195	EV_FREQUENT_CHECK;	2323	EV_FREQUENT_CHECK;
2196		2324
2197	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2325	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2198	}	2326	}
2199		2327
2200	void noinline	2328	void noinline
2201	ev_timer_stop (EV_P_ ev_timer *w)	2329	ev_timer_stop (EV_P_ ev_timer *w)
2202	{	2330	{
…		…
2207	EV_FREQUENT_CHECK;	2335	EV_FREQUENT_CHECK;
2208		2336
2209	{	2337	{
2210	int active = ev_active (w);	2338	int active = ev_active (w);
2211		2339
2212	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2340	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2213		2341
2214	--timercnt;	2342	--timercnt;
2215		2343
2216	if (expect_true (active < timercnt + HEAP0))	2344	if (expect_true (active < timercnt + HEAP0))
2217	{	2345	{
…		…
2261		2389
2262	if (w->reschedule_cb)	2390	if (w->reschedule_cb)
2263	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2391	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2264	else if (w->interval)	2392	else if (w->interval)
2265	{	2393	{
2266	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2394	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 */	2395	/* 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;	2396	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2269	}	2397	}
2270	else	2398	else
2271	ev_at (w) = w->offset;	2399	ev_at (w) = w->offset;
…		…
2279	ANHE_at_cache (periodics [ev_active (w)]);	2407	ANHE_at_cache (periodics [ev_active (w)]);
2280	upheap (periodics, ev_active (w));	2408	upheap (periodics, ev_active (w));
2281		2409
2282	EV_FREQUENT_CHECK;	2410	EV_FREQUENT_CHECK;
2283		2411
2284	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2412	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2285	}	2413	}
2286		2414
2287	void noinline	2415	void noinline
2288	ev_periodic_stop (EV_P_ ev_periodic *w)	2416	ev_periodic_stop (EV_P_ ev_periodic *w)
2289	{	2417	{
…		…
2294	EV_FREQUENT_CHECK;	2422	EV_FREQUENT_CHECK;
2295		2423
2296	{	2424	{
2297	int active = ev_active (w);	2425	int active = ev_active (w);
2298		2426
2299	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2427	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2300		2428
2301	--periodiccnt;	2429	--periodiccnt;
2302		2430
2303	if (expect_true (active < periodiccnt + HEAP0))	2431	if (expect_true (active < periodiccnt + HEAP0))
2304	{	2432	{
…		…
2327		2455
2328	void noinline	2456	void noinline
2329	ev_signal_start (EV_P_ ev_signal *w)	2457	ev_signal_start (EV_P_ ev_signal *w)
2330	{	2458	{
2331	#if EV_MULTIPLICITY	2459	#if EV_MULTIPLICITY
2332	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2460	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2333	#endif	2461	#endif
2334	if (expect_false (ev_is_active (w)))	2462	if (expect_false (ev_is_active (w)))
2335	return;	2463	return;
2336		2464
2337	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2465	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2338		2466
2339	evpipe_init (EV_A);	2467	evpipe_init (EV_A);
2340		2468
2341	EV_FREQUENT_CHECK;	2469	EV_FREQUENT_CHECK;
2342		2470
…		…
2345	sigset_t full, prev;	2473	sigset_t full, prev;
2346	sigfillset (&full);	2474	sigfillset (&full);
2347	sigprocmask (SIG_SETMASK, &full, &prev);	2475	sigprocmask (SIG_SETMASK, &full, &prev);
2348	#endif	2476	#endif
2349		2477
2350	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2478	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2351		2479
2352	#ifndef _WIN32	2480	#ifndef _WIN32
2353	sigprocmask (SIG_SETMASK, &prev, 0);	2481	sigprocmask (SIG_SETMASK, &prev, 0);
2354	#endif	2482	#endif
2355	}	2483	}
…		…
2393		2521
2394	void	2522	void
2395	ev_child_start (EV_P_ ev_child *w)	2523	ev_child_start (EV_P_ ev_child *w)
2396	{	2524	{
2397	#if EV_MULTIPLICITY	2525	#if EV_MULTIPLICITY
2398	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2526	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2399	#endif	2527	#endif
2400	if (expect_false (ev_is_active (w)))	2528	if (expect_false (ev_is_active (w)))
2401	return;	2529	return;
2402		2530
2403	EV_FREQUENT_CHECK;	2531	EV_FREQUENT_CHECK;
…		…
2428	# ifdef _WIN32	2556	# ifdef _WIN32
2429	# undef lstat	2557	# undef lstat
2430	# define lstat(a,b) _stati64 (a,b)	2558	# define lstat(a,b) _stati64 (a,b)
2431	# endif	2559	# endif
2432		2560
2433	#define DEF_STAT_INTERVAL 5.0074891	2561	#define DEF_STAT_INTERVAL 5.0074891
		2562	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2434	#define MIN_STAT_INTERVAL 0.1074891	2563	#define MIN_STAT_INTERVAL 0.1074891
2435		2564
2436	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2565	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2437		2566
2438	#if EV_USE_INOTIFY	2567	#if EV_USE_INOTIFY
2439	# define EV_INOTIFY_BUFSIZE 8192	2568	# define EV_INOTIFY_BUFSIZE 8192
…		…
2443	{	2572	{
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);	2573	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		2574
2446	if (w->wd < 0)	2575	if (w->wd < 0)
2447	{	2576	{
		2577	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 */	2578	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2449		2579
2450	/* monitor some parent directory for speedup hints */	2580	/* monitor some parent directory for speedup hints */
2451	/* note that exceeding the hardcoded limit is not a correctness issue, */	2581	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2452	/* but an efficiency issue only */	2582	/* but an efficiency issue only */
2453	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2583	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2454	{	2584	{
2455	char path [4096];	2585	char path [4096];
2456	strcpy (path, w->path);	2586	strcpy (path, w->path);
…		…
2460	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2590	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2461	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2591	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2462		2592
2463	char *pend = strrchr (path, '/');	2593	char *pend = strrchr (path, '/');
2464		2594
2465	if (!pend)	2595	if (!pend || pend == path)
2466	break; /* whoops, no '/', complain to your admin */	2596	break;
2467		2597
2468	*pend = 0;	2598	*pend = 0;
2469	w->wd = inotify_add_watch (fs_fd, path, mask);	2599	w->wd = inotify_add_watch (fs_fd, path, mask);
2470	}	2600	}
2471	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2601	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2472	}	2602	}
2473	}	2603	}
2474	else
2475	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2476		2604
2477	if (w->wd >= 0)	2605	if (w->wd >= 0)
		2606	{
2478	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2607	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2608
		2609	/* now local changes will be tracked by inotify, but remote changes won't */
		2610	/* unless the filesystem it known to be local, we therefore still poll */
		2611	/* also do poll on <2.6.25, but with normal frequency */
		2612	struct statfs sfs;
		2613
		2614	if (fs_2625 && !statfs (w->path, &sfs))
		2615	if (sfs.f_type == 0x1373 /* devfs */
		2616	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2617	|| sfs.f_type == 0x3153464a /* jfs */
		2618	|| sfs.f_type == 0x52654973 /* reiser3 */
		2619	|| sfs.f_type == 0x01021994 /* tempfs */
		2620	|| sfs.f_type == 0x58465342 /* xfs */)
		2621	return;
		2622
		2623	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2624	ev_timer_again (EV_A_ &w->timer);
		2625	}
2479	}	2626	}
2480		2627
2481	static void noinline	2628	static void noinline
2482	infy_del (EV_P_ ev_stat *w)	2629	infy_del (EV_P_ ev_stat *w)
2483	{	2630	{
…		…
2513		2660
2514	if (w->wd == wd || wd == -1)	2661	if (w->wd == wd || wd == -1)
2515	{	2662	{
2516	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2663	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2517	{	2664	{
		2665	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2518	w->wd = -1;	2666	w->wd = -1;
2519	infy_add (EV_A_ w); /* re-add, no matter what */	2667	infy_add (EV_A_ w); /* re-add, no matter what */
2520	}	2668	}
2521		2669
2522	stat_timer_cb (EV_A_ &w->timer, 0);	2670	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2535		2683
2536	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2684	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2537	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2685	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2538	}	2686	}
2539		2687
2540	void inline_size	2688	inline_size void
2541	infy_init (EV_P)	2689	check_2625 (EV_P)
2542	{	2690	{
2543	if (fs_fd != -2)
2544	return;
2545
2546	/* kernels < 2.6.25 are borked	2691	/* kernels < 2.6.25 are borked
2547	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2692	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2548	*/	2693	*/
2549	{
2550	struct utsname buf;	2694	struct utsname buf;
2551	int major, minor, micro;	2695	int major, minor, micro;
2552		2696
2553	fs_fd = -1;
2554
2555	if (uname (&buf))	2697	if (uname (&buf))
2556	return;	2698	return;
2557		2699
2558	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2700	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2559	return;	2701	return;
2560		2702
2561	if (major < 2	2703	if (major < 2
2562	|| (major == 2 && minor < 6)	2704	|| (major == 2 && minor < 6)
2563	|| (major == 2 && minor == 6 && micro < 25))	2705	|| (major == 2 && minor == 6 && micro < 25))
2564	return;	2706	return;
2565	}	2707
		2708	fs_2625 = 1;
		2709	}
		2710
		2711	inline_size void
		2712	infy_init (EV_P)
		2713	{
		2714	if (fs_fd != -2)
		2715	return;
		2716
		2717	fs_fd = -1;
		2718
		2719	check_2625 (EV_A);
2566		2720
2567	fs_fd = inotify_init ();	2721	fs_fd = inotify_init ();
2568		2722
2569	if (fs_fd >= 0)	2723	if (fs_fd >= 0)
2570	{	2724	{
…		…
2572	ev_set_priority (&fs_w, EV_MAXPRI);	2726	ev_set_priority (&fs_w, EV_MAXPRI);
2573	ev_io_start (EV_A_ &fs_w);	2727	ev_io_start (EV_A_ &fs_w);
2574	}	2728	}
2575	}	2729	}
2576		2730
2577	void inline_size	2731	inline_size void
2578	infy_fork (EV_P)	2732	infy_fork (EV_P)
2579	{	2733	{
2580	int slot;	2734	int slot;
2581		2735
2582	if (fs_fd < 0)	2736	if (fs_fd < 0)
…		…
2598	w->wd = -1;	2752	w->wd = -1;
2599		2753
2600	if (fs_fd >= 0)	2754	if (fs_fd >= 0)
2601	infy_add (EV_A_ w); /* re-add, no matter what */	2755	infy_add (EV_A_ w); /* re-add, no matter what */
2602	else	2756	else
2603	ev_timer_start (EV_A_ &w->timer);	2757	ev_timer_again (EV_A_ &w->timer);
2604	}	2758	}
2605	}	2759	}
2606	}	2760	}
2607		2761
2608	#endif	2762	#endif
…		…
2663	ev_stat_start (EV_P_ ev_stat *w)	2817	ev_stat_start (EV_P_ ev_stat *w)
2664	{	2818	{
2665	if (expect_false (ev_is_active (w)))	2819	if (expect_false (ev_is_active (w)))
2666	return;	2820	return;
2667		2821
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);	2822	ev_stat_stat (EV_A_ w);
2673		2823
		2824	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2674	if (w->interval < MIN_STAT_INTERVAL)	2825	w->interval = MIN_STAT_INTERVAL;
2675	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2676		2826
2677	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2827	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));	2828	ev_set_priority (&w->timer, ev_priority (w));
2679		2829
2680	#if EV_USE_INOTIFY	2830	#if EV_USE_INOTIFY
2681	infy_init (EV_A);	2831	infy_init (EV_A);
2682		2832
2683	if (fs_fd >= 0)	2833	if (fs_fd >= 0)
2684	infy_add (EV_A_ w);	2834	infy_add (EV_A_ w);
2685	else	2835	else
2686	#endif	2836	#endif
2687	ev_timer_start (EV_A_ &w->timer);	2837	ev_timer_again (EV_A_ &w->timer);
2688		2838
2689	ev_start (EV_A_ (W)w, 1);	2839	ev_start (EV_A_ (W)w, 1);
2690		2840
2691	EV_FREQUENT_CHECK;	2841	EV_FREQUENT_CHECK;
2692	}	2842	}
…		…
2867	static void	3017	static void
2868	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3018	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2869	{	3019	{
2870	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3020	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2871		3021
		3022	ev_embed_stop (EV_A_ w);
		3023
2872	{	3024	{
2873	struct ev_loop *loop = w->other;	3025	struct ev_loop *loop = w->other;
2874		3026
2875	ev_loop_fork (EV_A);	3027	ev_loop_fork (EV_A);
		3028	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2876	}	3029	}
		3030
		3031	ev_embed_start (EV_A_ w);
2877	}	3032	}
2878		3033
2879	#if 0	3034	#if 0
2880	static void	3035	static void
2881	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3036	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2890	if (expect_false (ev_is_active (w)))	3045	if (expect_false (ev_is_active (w)))
2891	return;	3046	return;
2892		3047
2893	{	3048	{
2894	struct ev_loop *loop = w->other;	3049	struct ev_loop *loop = w->other;
2895	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3050	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);	3051	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2897	}	3052	}
2898		3053
2899	EV_FREQUENT_CHECK;	3054	EV_FREQUENT_CHECK;
2900		3055
…		…
3083	ev_timer_set (&once->to, timeout, 0.);	3238	ev_timer_set (&once->to, timeout, 0.);
3084	ev_timer_start (EV_A_ &once->to);	3239	ev_timer_start (EV_A_ &once->to);
3085	}	3240	}
3086	}	3241	}
3087		3242
		3243	/*****************************************************************************/
		3244
		3245	#if EV_WALK_ENABLE
		3246	void
		3247	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3248	{
		3249	int i, j;
		3250	ev_watcher_list *wl, *wn;
		3251
		3252	if (types & (EV_IO | EV_EMBED))
		3253	for (i = 0; i < anfdmax; ++i)
		3254	for (wl = anfds [i].head; wl; )
		3255	{
		3256	wn = wl->next;
		3257
		3258	#if EV_EMBED_ENABLE
		3259	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3260	{
		3261	if (types & EV_EMBED)
		3262	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3263	}
		3264	else
		3265	#endif
		3266	#if EV_USE_INOTIFY
		3267	if (ev_cb ((ev_io *)wl) == infy_cb)
		3268	;
		3269	else
		3270	#endif
		3271	if ((ev_io *)wl != &pipe_w)
		3272	if (types & EV_IO)
		3273	cb (EV_A_ EV_IO, wl);
		3274
		3275	wl = wn;
		3276	}
		3277
		3278	if (types & (EV_TIMER | EV_STAT))
		3279	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3280	#if EV_STAT_ENABLE
		3281	/*TODO: timer is not always active*/
		3282	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3283	{
		3284	if (types & EV_STAT)
		3285	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3286	}
		3287	else
		3288	#endif
		3289	if (types & EV_TIMER)
		3290	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3291
		3292	#if EV_PERIODIC_ENABLE
		3293	if (types & EV_PERIODIC)
		3294	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3295	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3296	#endif
		3297
		3298	#if EV_IDLE_ENABLE
		3299	if (types & EV_IDLE)
		3300	for (j = NUMPRI; i--; )
		3301	for (i = idlecnt [j]; i--; )
		3302	cb (EV_A_ EV_IDLE, idles [j][i]);
		3303	#endif
		3304
		3305	#if EV_FORK_ENABLE
		3306	if (types & EV_FORK)
		3307	for (i = forkcnt; i--; )
		3308	if (ev_cb (forks [i]) != embed_fork_cb)
		3309	cb (EV_A_ EV_FORK, forks [i]);
		3310	#endif
		3311
		3312	#if EV_ASYNC_ENABLE
		3313	if (types & EV_ASYNC)
		3314	for (i = asynccnt; i--; )
		3315	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3316	#endif
		3317
		3318	if (types & EV_PREPARE)
		3319	for (i = preparecnt; i--; )
		3320	#if EV_EMBED_ENABLE
		3321	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3322	#endif
		3323	cb (EV_A_ EV_PREPARE, prepares [i]);
		3324
		3325	if (types & EV_CHECK)
		3326	for (i = checkcnt; i--; )
		3327	cb (EV_A_ EV_CHECK, checks [i]);
		3328
		3329	if (types & EV_SIGNAL)
		3330	for (i = 0; i < signalmax; ++i)
		3331	for (wl = signals [i].head; wl; )
		3332	{
		3333	wn = wl->next;
		3334	cb (EV_A_ EV_SIGNAL, wl);
		3335	wl = wn;
		3336	}
		3337
		3338	if (types & EV_CHILD)
		3339	for (i = EV_PID_HASHSIZE; i--; )
		3340	for (wl = childs [i]; wl; )
		3341	{
		3342	wn = wl->next;
		3343	cb (EV_A_ EV_CHILD, wl);
		3344	wl = wn;
		3345	}
		3346	/* EV_STAT 0x00001000 /* stat data changed */
		3347	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3348	}
		3349	#endif
		3350
3088	#if EV_MULTIPLICITY	3351	#if EV_MULTIPLICITY
3089	#include "ev_wrap.h"	3352	#include "ev_wrap.h"
3090	#endif	3353	#endif
3091		3354
3092	#ifdef __cplusplus	3355	#ifdef __cplusplus

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