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Comparing libev/ev.c (file contents):
Revision 1.269 by root, Wed Oct 29 06:32:48 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"
…		…
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 */
453	unsigned char reify;	488	unsigned char reify; /* flag set when this ANFD needs reification */
454	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	489	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455	unsigned char unused;	490	unsigned char unused;
456	#if EV_USE_EPOLL	491	#if EV_USE_EPOLL
457	unsigned int egen; /* generation counter to counter epoll bugs */	492	unsigned int egen; /* generation counter to counter epoll bugs */
458	#endif	493	#endif
459	#if EV_SELECT_IS_WINSOCKET	494	#if EV_SELECT_IS_WINSOCKET
460	SOCKET handle;	495	SOCKET handle;
461	#endif	496	#endif
462	} ANFD;	497	} ANFD;
463		498
		499	/* stores the pending event set for a given watcher */
464	typedef struct	500	typedef struct
465	{	501	{
466	W w;	502	W w;
467	int events;	503	int events; /* the pending event set for the given watcher */
468	} ANPENDING;	504	} ANPENDING;
469		505
470	#if EV_USE_INOTIFY	506	#if EV_USE_INOTIFY
471	/* hash table entry per inotify-id */	507	/* hash table entry per inotify-id */
472	typedef struct	508	typedef struct
…		…
475	} ANFS;	511	} ANFS;
476	#endif	512	#endif
477		513
478	/* Heap Entry */	514	/* Heap Entry */
479	#if EV_HEAP_CACHE_AT	515	#if EV_HEAP_CACHE_AT
		516	/* a heap element */
480	typedef struct {	517	typedef struct {
481	ev_tstamp at;	518	ev_tstamp at;
482	WT w;	519	WT w;
483	} ANHE;	520	} ANHE;
484		521
485	#define ANHE_w(he) (he).w /* access watcher, read-write */	522	#define ANHE_w(he) (he).w /* access watcher, read-write */
486	#define ANHE_at(he) (he).at /* access cached at, read-only */	523	#define ANHE_at(he) (he).at /* access cached at, read-only */
487	#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 */
488	#else	525	#else
		526	/* a heap element */
489	typedef WT ANHE;	527	typedef WT ANHE;
490		528
491	#define ANHE_w(he) (he)	529	#define ANHE_w(he) (he)
492	#define ANHE_at(he) (he)->at	530	#define ANHE_at(he) (he)->at
493	#define ANHE_at_cache(he)	531	#define ANHE_at_cache(he)
…		…
523		561
524	ev_tstamp	562	ev_tstamp
525	ev_time (void)	563	ev_time (void)
526	{	564	{
527	#if EV_USE_REALTIME	565	#if EV_USE_REALTIME
		566	if (expect_true (have_realtime))
		567	{
528	struct timespec ts;	568	struct timespec ts;
529	clock_gettime (CLOCK_REALTIME, &ts);	569	clock_gettime (CLOCK_REALTIME, &ts);
530	return ts.tv_sec + ts.tv_nsec * 1e-9;	570	return ts.tv_sec + ts.tv_nsec * 1e-9;
531	#else	571	}
		572	#endif
		573
532	struct timeval tv;	574	struct timeval tv;
533	gettimeofday (&tv, 0);	575	gettimeofday (&tv, 0);
534	return tv.tv_sec + tv.tv_usec * 1e-6;	576	return tv.tv_sec + tv.tv_usec * 1e-6;
535	#endif
536	}	577	}
537		578
538	ev_tstamp inline_size	579	inline_size ev_tstamp
539	get_clock (void)	580	get_clock (void)
540	{	581	{
541	#if EV_USE_MONOTONIC	582	#if EV_USE_MONOTONIC
542	if (expect_true (have_monotonic))	583	if (expect_true (have_monotonic))
543	{	584	{
…		…
588		629
589	/*****************************************************************************/	630	/*****************************************************************************/
590		631
591	#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 */
592		633
593	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
594	array_nextsize (int elem, int cur, int cnt)	637	array_nextsize (int elem, int cur, int cnt)
595	{	638	{
596	int ncur = cur + 1;	639	int ncur = cur + 1;
597		640
598	do	641	do
…		…
639	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	682	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
640	}	683	}
641	#endif	684	#endif
642		685
643	#define array_free(stem, idx) \	686	#define array_free(stem, idx) \
644	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
645		688
646	/*****************************************************************************/	689	/*****************************************************************************/
		690
		691	/* dummy callback for pending events */
		692	static void noinline
		693	pendingcb (EV_P_ ev_prepare *w, int revents)
		694	{
		695	}
647		696
648	void noinline	697	void noinline
649	ev_feed_event (EV_P_ void *w, int revents)	698	ev_feed_event (EV_P_ void *w, int revents)
650	{	699	{
651	W w_ = (W)w;	700	W w_ = (W)w;
…		…
660	pendings [pri][w_->pending - 1].w = w_;	709	pendings [pri][w_->pending - 1].w = w_;
661	pendings [pri][w_->pending - 1].events = revents;	710	pendings [pri][w_->pending - 1].events = revents;
662	}	711	}
663	}	712	}
664		713
665	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
666	queue_events (EV_P_ W *events, int eventcnt, int type)	730	queue_events (EV_P_ W *events, int eventcnt, int type)
667	{	731	{
668	int i;	732	int i;
669		733
670	for (i = 0; i < eventcnt; ++i)	734	for (i = 0; i < eventcnt; ++i)
671	ev_feed_event (EV_A_ events [i], type);	735	ev_feed_event (EV_A_ events [i], type);
672	}	736	}
673		737
674	/*****************************************************************************/	738	/*****************************************************************************/
675		739
676	void inline_speed	740	inline_speed void
677	fd_event (EV_P_ int fd, int revents)	741	fd_event (EV_P_ int fd, int revents)
678	{	742	{
679	ANFD *anfd = anfds + fd;	743	ANFD *anfd = anfds + fd;
680	ev_io *w;	744	ev_io *w;
681		745
…		…
693	{	757	{
694	if (fd >= 0 && fd < anfdmax)	758	if (fd >= 0 && fd < anfdmax)
695	fd_event (EV_A_ fd, revents);	759	fd_event (EV_A_ fd, revents);
696	}	760	}
697		761
698	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
699	fd_reify (EV_P)	765	fd_reify (EV_P)
700	{	766	{
701	int i;	767	int i;
702		768
703	for (i = 0; i < fdchangecnt; ++i)	769	for (i = 0; i < fdchangecnt; ++i)
…		…
718	#ifdef EV_FD_TO_WIN32_HANDLE	784	#ifdef EV_FD_TO_WIN32_HANDLE
719	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	785	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
720	#else	786	#else
721	anfd->handle = _get_osfhandle (fd);	787	anfd->handle = _get_osfhandle (fd);
722	#endif	788	#endif
723	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));
724	}	790	}
725	#endif	791	#endif
726		792
727	{	793	{
728	unsigned char o_events = anfd->events;	794	unsigned char o_events = anfd->events;
729	unsigned char o_reify = anfd->reify;	795	unsigned char o_reify = anfd->reify;
730		796
731	anfd->reify = 0;	797	anfd->reify = 0;
732	anfd->events = events;	798	anfd->events = events;
733		799
734	if (o_events != events || o_reify & EV_IOFDSET)	800	if (o_events != events || o_reify & EV__IOFDSET)
735	backend_modify (EV_A_ fd, o_events, events);	801	backend_modify (EV_A_ fd, o_events, events);
736	}	802	}
737	}	803	}
738		804
739	fdchangecnt = 0;	805	fdchangecnt = 0;
740	}	806	}
741		807
742	void inline_size	808	/* something about the given fd changed */
		809	inline_size void
743	fd_change (EV_P_ int fd, int flags)	810	fd_change (EV_P_ int fd, int flags)
744	{	811	{
745	unsigned char reify = anfds [fd].reify;	812	unsigned char reify = anfds [fd].reify;
746	anfds [fd].reify |= flags;	813	anfds [fd].reify |= flags;
747		814
…		…
751	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	818	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
752	fdchanges [fdchangecnt - 1] = fd;	819	fdchanges [fdchangecnt - 1] = fd;
753	}	820	}
754	}	821	}
755		822
756	void inline_speed	823	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		824	inline_speed void
757	fd_kill (EV_P_ int fd)	825	fd_kill (EV_P_ int fd)
758	{	826	{
759	ev_io *w;	827	ev_io *w;
760		828
761	while ((w = (ev_io *)anfds [fd].head))	829	while ((w = (ev_io *)anfds [fd].head))
…		…
763	ev_io_stop (EV_A_ w);	831	ev_io_stop (EV_A_ w);
764	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);
765	}	833	}
766	}	834	}
767		835
768	int inline_size	836	/* check whether the given fd is atcually valid, for error recovery */
		837	inline_size int
769	fd_valid (int fd)	838	fd_valid (int fd)
770	{	839	{
771	#ifdef _WIN32	840	#ifdef _WIN32
772	return _get_osfhandle (fd) != -1;	841	return _get_osfhandle (fd) != -1;
773	#else	842	#else
…		…
810	for (fd = 0; fd < anfdmax; ++fd)	879	for (fd = 0; fd < anfdmax; ++fd)
811	if (anfds [fd].events)	880	if (anfds [fd].events)
812	{	881	{
813	anfds [fd].events = 0;	882	anfds [fd].events = 0;
814	anfds [fd].emask = 0;	883	anfds [fd].emask = 0;
815	fd_change (EV_A_ fd, EV_IOFDSET | 1);	884	fd_change (EV_A_ fd, EV__IOFDSET | 1);
816	}	885	}
817	}	886	}
818		887
819	/*****************************************************************************/	888	/*****************************************************************************/
820		889
…		…
836	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	905	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
837	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	906	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
838	#define UPHEAP_DONE(p,k) ((p) == (k))	907	#define UPHEAP_DONE(p,k) ((p) == (k))
839		908
840	/* away from the root */	909	/* away from the root */
841	void inline_speed	910	inline_speed void
842	downheap (ANHE *heap, int N, int k)	911	downheap (ANHE *heap, int N, int k)
843	{	912	{
844	ANHE he = heap [k];	913	ANHE he = heap [k];
845	ANHE *E = heap + N + HEAP0;	914	ANHE *E = heap + N + HEAP0;
846		915
…		…
886	#define HEAP0 1	955	#define HEAP0 1
887	#define HPARENT(k) ((k) >> 1)	956	#define HPARENT(k) ((k) >> 1)
888	#define UPHEAP_DONE(p,k) (!(p))	957	#define UPHEAP_DONE(p,k) (!(p))
889		958
890	/* away from the root */	959	/* away from the root */
891	void inline_speed	960	inline_speed void
892	downheap (ANHE *heap, int N, int k)	961	downheap (ANHE *heap, int N, int k)
893	{	962	{
894	ANHE he = heap [k];	963	ANHE he = heap [k];
895		964
896	for (;;)	965	for (;;)
…		…
916	ev_active (ANHE_w (he)) = k;	985	ev_active (ANHE_w (he)) = k;
917	}	986	}
918	#endif	987	#endif
919		988
920	/* towards the root */	989	/* towards the root */
921	void inline_speed	990	inline_speed void
922	upheap (ANHE *heap, int k)	991	upheap (ANHE *heap, int k)
923	{	992	{
924	ANHE he = heap [k];	993	ANHE he = heap [k];
925		994
926	for (;;)	995	for (;;)
…		…
937		1006
938	heap [k] = he;	1007	heap [k] = he;
939	ev_active (ANHE_w (he)) = k;	1008	ev_active (ANHE_w (he)) = k;
940	}	1009	}
941		1010
942	void inline_size	1011	/* move an element suitably so it is in a correct place */
		1012	inline_size void
943	adjustheap (ANHE *heap, int N, int k)	1013	adjustheap (ANHE *heap, int N, int k)
944	{	1014	{
945	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]))
946	upheap (heap, k);	1016	upheap (heap, k);
947	else	1017	else
948	downheap (heap, N, k);	1018	downheap (heap, N, k);
949	}	1019	}
950		1020
951	/* 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 */
952	void inline_size	1022	inline_size void
953	reheap (ANHE *heap, int N)	1023	reheap (ANHE *heap, int N)
954	{	1024	{
955	int i;	1025	int i;
956		1026
957	/* 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 */
…		…
960	upheap (heap, i + HEAP0);	1030	upheap (heap, i + HEAP0);
961	}	1031	}
962		1032
963	/*****************************************************************************/	1033	/*****************************************************************************/
964		1034
		1035	/* associate signal watchers to a signal signal */
965	typedef struct	1036	typedef struct
966	{	1037	{
967	WL head;	1038	WL head;
968	EV_ATOMIC_T gotsig;	1039	EV_ATOMIC_T gotsig;
969	} ANSIG;	1040	} ANSIG;
…		…
973		1044
974	static EV_ATOMIC_T gotsig;	1045	static EV_ATOMIC_T gotsig;
975		1046
976	/*****************************************************************************/	1047	/*****************************************************************************/
977		1048
978	void inline_speed	1049	/* used to prepare libev internal fd's */
		1050	/* this is not fork-safe */
		1051	inline_speed void
979	fd_intern (int fd)	1052	fd_intern (int fd)
980	{	1053	{
981	#ifdef _WIN32	1054	#ifdef _WIN32
982	unsigned long arg = 1;	1055	unsigned long arg = 1;
983	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1056	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
988	}	1061	}
989		1062
990	static void noinline	1063	static void noinline
991	evpipe_init (EV_P)	1064	evpipe_init (EV_P)
992	{	1065	{
993	if (!ev_is_active (&pipeev))	1066	if (!ev_is_active (&pipe_w))
994	{	1067	{
995	#if EV_USE_EVENTFD	1068	#if EV_USE_EVENTFD
996	if ((evfd = eventfd (0, 0)) >= 0)	1069	if ((evfd = eventfd (0, 0)) >= 0)
997	{	1070	{
998	evpipe [0] = -1;	1071	evpipe [0] = -1;
999	fd_intern (evfd);	1072	fd_intern (evfd);
1000	ev_io_set (&pipeev, evfd, EV_READ);	1073	ev_io_set (&pipe_w, evfd, EV_READ);
1001	}	1074	}
1002	else	1075	else
1003	#endif	1076	#endif
1004	{	1077	{
1005	while (pipe (evpipe))	1078	while (pipe (evpipe))
1006	ev_syserr ("(libev) error creating signal/async pipe");	1079	ev_syserr ("(libev) error creating signal/async pipe");
1007		1080
1008	fd_intern (evpipe [0]);	1081	fd_intern (evpipe [0]);
1009	fd_intern (evpipe [1]);	1082	fd_intern (evpipe [1]);
1010	ev_io_set (&pipeev, evpipe [0], EV_READ);	1083	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1011	}	1084	}
1012		1085
1013	ev_io_start (EV_A_ &pipeev);	1086	ev_io_start (EV_A_ &pipe_w);
1014	ev_unref (EV_A); /* watcher should not keep loop alive */	1087	ev_unref (EV_A); /* watcher should not keep loop alive */
1015	}	1088	}
1016	}	1089	}
1017		1090
1018	void inline_size	1091	inline_size void
1019	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1092	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1020	{	1093	{
1021	if (!*flag)	1094	if (!*flag)
1022	{	1095	{
1023	int old_errno = errno; /* save errno because write might clobber it */	1096	int old_errno = errno; /* save errno because write might clobber it */
…		…
1036		1109
1037	errno = old_errno;	1110	errno = old_errno;
1038	}	1111	}
1039	}	1112	}
1040		1113
		1114	/* called whenever the libev signal pipe */
		1115	/* got some events (signal, async) */
1041	static void	1116	static void
1042	pipecb (EV_P_ ev_io *iow, int revents)	1117	pipecb (EV_P_ ev_io *iow, int revents)
1043	{	1118	{
1044	#if EV_USE_EVENTFD	1119	#if EV_USE_EVENTFD
1045	if (evfd >= 0)	1120	if (evfd >= 0)
…		…
1101	ev_feed_signal_event (EV_P_ int signum)	1176	ev_feed_signal_event (EV_P_ int signum)
1102	{	1177	{
1103	WL w;	1178	WL w;
1104		1179
1105	#if EV_MULTIPLICITY	1180	#if EV_MULTIPLICITY
1106	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));
1107	#endif	1182	#endif
1108		1183
1109	--signum;	1184	--signum;
1110		1185
1111	if (signum < 0 || signum >= signalmax)	1186	if (signum < 0 || signum >= signalmax)
…		…
1127		1202
1128	#ifndef WIFCONTINUED	1203	#ifndef WIFCONTINUED
1129	# define WIFCONTINUED(status) 0	1204	# define WIFCONTINUED(status) 0
1130	#endif	1205	#endif
1131		1206
1132	void inline_speed	1207	/* handle a single child status event */
		1208	inline_speed void
1133	child_reap (EV_P_ int chain, int pid, int status)	1209	child_reap (EV_P_ int chain, int pid, int status)
1134	{	1210	{
1135	ev_child *w;	1211	ev_child *w;
1136	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1212	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1137		1213
…		…
1150		1226
1151	#ifndef WCONTINUED	1227	#ifndef WCONTINUED
1152	# define WCONTINUED 0	1228	# define WCONTINUED 0
1153	#endif	1229	#endif
1154		1230
		1231	/* called on sigchld etc., calls waitpid */
1155	static void	1232	static void
1156	childcb (EV_P_ ev_signal *sw, int revents)	1233	childcb (EV_P_ ev_signal *sw, int revents)
1157	{	1234	{
1158	int pid, status;	1235	int pid, status;
1159		1236
…		…
1240	/* kqueue is borked on everything but netbsd apparently */	1317	/* kqueue is borked on everything but netbsd apparently */
1241	/* 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 */
1242	flags &= ~EVBACKEND_KQUEUE;	1319	flags &= ~EVBACKEND_KQUEUE;
1243	#endif	1320	#endif
1244	#ifdef __APPLE__	1321	#ifdef __APPLE__
1245	// flags &= ~EVBACKEND_KQUEUE; for documentation	1322	/* only select works correctly on that "unix-certified" platform */
1246	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 */
1247	#endif	1325	#endif
1248		1326
1249	return flags;	1327	return flags;
1250	}	1328	}
1251		1329
…		…
1283	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1361	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1284	{	1362	{
1285	timeout_blocktime = interval;	1363	timeout_blocktime = interval;
1286	}	1364	}
1287		1365
		1366	/* initialise a loop structure, must be zero-initialised */
1288	static void noinline	1367	static void noinline
1289	loop_init (EV_P_ unsigned int flags)	1368	loop_init (EV_P_ unsigned int flags)
1290	{	1369	{
1291	if (!backend)	1370	if (!backend)
1292	{	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
1293	#if EV_USE_MONOTONIC	1382	#if EV_USE_MONOTONIC
		1383	if (!have_monotonic)
1294	{	1384	{
1295	struct timespec ts;	1385	struct timespec ts;
		1386
1296	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1387	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1297	have_monotonic = 1;	1388	have_monotonic = 1;
1298	}	1389	}
1299	#endif	1390	#endif
1300		1391
1301	ev_rt_now = ev_time ();	1392	ev_rt_now = ev_time ();
1302	mn_now = get_clock ();	1393	mn_now = get_clock ();
1303	now_floor = mn_now;	1394	now_floor = mn_now;
…		…
1340	#endif	1431	#endif
1341	#if EV_USE_SELECT	1432	#if EV_USE_SELECT
1342	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1433	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1343	#endif	1434	#endif
1344		1435
		1436	ev_prepare_init (&pending_w, pendingcb);
		1437
1345	ev_init (&pipeev, pipecb);	1438	ev_init (&pipe_w, pipecb);
1346	ev_set_priority (&pipeev, EV_MAXPRI);	1439	ev_set_priority (&pipe_w, EV_MAXPRI);
1347	}	1440	}
1348	}	1441	}
1349		1442
		1443	/* free up a loop structure */
1350	static void noinline	1444	static void noinline
1351	loop_destroy (EV_P)	1445	loop_destroy (EV_P)
1352	{	1446	{
1353	int i;	1447	int i;
1354		1448
1355	if (ev_is_active (&pipeev))	1449	if (ev_is_active (&pipe_w))
1356	{	1450	{
1357	ev_ref (EV_A); /* signal watcher */	1451	ev_ref (EV_A); /* signal watcher */
1358	ev_io_stop (EV_A_ &pipeev);	1452	ev_io_stop (EV_A_ &pipe_w);
1359		1453
1360	#if EV_USE_EVENTFD	1454	#if EV_USE_EVENTFD
1361	if (evfd >= 0)	1455	if (evfd >= 0)
1362	close (evfd);	1456	close (evfd);
1363	#endif	1457	#endif
…		…
1402	}	1496	}
1403		1497
1404	ev_free (anfds); anfdmax = 0;	1498	ev_free (anfds); anfdmax = 0;
1405		1499
1406	/* 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);
1407	array_free (fdchange, EMPTY);	1502	array_free (fdchange, EMPTY);
1408	array_free (timer, EMPTY);	1503	array_free (timer, EMPTY);
1409	#if EV_PERIODIC_ENABLE	1504	#if EV_PERIODIC_ENABLE
1410	array_free (periodic, EMPTY);	1505	array_free (periodic, EMPTY);
1411	#endif	1506	#endif
…		…
1420		1515
1421	backend = 0;	1516	backend = 0;
1422	}	1517	}
1423		1518
1424	#if EV_USE_INOTIFY	1519	#if EV_USE_INOTIFY
1425	void inline_size infy_fork (EV_P);	1520	inline_size void infy_fork (EV_P);
1426	#endif	1521	#endif
1427		1522
1428	void inline_size	1523	inline_size void
1429	loop_fork (EV_P)	1524	loop_fork (EV_P)
1430	{	1525	{
1431	#if EV_USE_PORT	1526	#if EV_USE_PORT
1432	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1527	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1433	#endif	1528	#endif
…		…
1439	#endif	1534	#endif
1440	#if EV_USE_INOTIFY	1535	#if EV_USE_INOTIFY
1441	infy_fork (EV_A);	1536	infy_fork (EV_A);
1442	#endif	1537	#endif
1443		1538
1444	if (ev_is_active (&pipeev))	1539	if (ev_is_active (&pipe_w))
1445	{	1540	{
1446	/* this "locks" the handlers against writing to the pipe */	1541	/* this "locks" the handlers against writing to the pipe */
1447	/* while we modify the fd vars */	1542	/* while we modify the fd vars */
1448	gotsig = 1;	1543	gotsig = 1;
1449	#if EV_ASYNC_ENABLE	1544	#if EV_ASYNC_ENABLE
1450	gotasync = 1;	1545	gotasync = 1;
1451	#endif	1546	#endif
1452		1547
1453	ev_ref (EV_A);	1548	ev_ref (EV_A);
1454	ev_io_stop (EV_A_ &pipeev);	1549	ev_io_stop (EV_A_ &pipe_w);
1455		1550
1456	#if EV_USE_EVENTFD	1551	#if EV_USE_EVENTFD
1457	if (evfd >= 0)	1552	if (evfd >= 0)
1458	close (evfd);	1553	close (evfd);
1459	#endif	1554	#endif
…		…
1464	close (evpipe [1]);	1559	close (evpipe [1]);
1465	}	1560	}
1466		1561
1467	evpipe_init (EV_A);	1562	evpipe_init (EV_A);
1468	/* now iterate over everything, in case we missed something */	1563	/* now iterate over everything, in case we missed something */
1469	pipecb (EV_A_ &pipeev, EV_READ);	1564	pipecb (EV_A_ &pipe_w, EV_READ);
1470	}	1565	}
1471		1566
1472	postfork = 0;	1567	postfork = 0;
1473	}	1568	}
1474		1569
…		…
1504		1599
1505	#if EV_VERIFY	1600	#if EV_VERIFY
1506	static void noinline	1601	static void noinline
1507	verify_watcher (EV_P_ W w)	1602	verify_watcher (EV_P_ W w)
1508	{	1603	{
1509	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1604	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1510		1605
1511	if (w->pending)	1606	if (w->pending)
1512	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));
1513	}	1608	}
1514		1609
1515	static void noinline	1610	static void noinline
1516	verify_heap (EV_P_ ANHE *heap, int N)	1611	verify_heap (EV_P_ ANHE *heap, int N)
1517	{	1612	{
1518	int i;	1613	int i;
1519		1614
1520	for (i = HEAP0; i < N + HEAP0; ++i)	1615	for (i = HEAP0; i < N + HEAP0; ++i)
1521	{	1616	{
1522	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));
1523	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])));
1524	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]))));
1525		1620
1526	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1621	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1527	}	1622	}
1528	}	1623	}
1529		1624
1530	static void noinline	1625	static void noinline
1531	array_verify (EV_P_ W *ws, int cnt)	1626	array_verify (EV_P_ W *ws, int cnt)
1532	{	1627	{
1533	while (cnt--)	1628	while (cnt--)
1534	{	1629	{
1535	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1630	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1536	verify_watcher (EV_A_ ws [cnt]);	1631	verify_watcher (EV_A_ ws [cnt]);
1537	}	1632	}
1538	}	1633	}
1539	#endif	1634	#endif
1540		1635
…		…
1547		1642
1548	assert (activecnt >= -1);	1643	assert (activecnt >= -1);
1549		1644
1550	assert (fdchangemax >= fdchangecnt);	1645	assert (fdchangemax >= fdchangecnt);
1551	for (i = 0; i < fdchangecnt; ++i)	1646	for (i = 0; i < fdchangecnt; ++i)
1552	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1647	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1553		1648
1554	assert (anfdmax >= 0);	1649	assert (anfdmax >= 0);
1555	for (i = 0; i < anfdmax; ++i)	1650	for (i = 0; i < anfdmax; ++i)
1556	for (w = anfds [i].head; w; w = w->next)	1651	for (w = anfds [i].head; w; w = w->next)
1557	{	1652	{
1558	verify_watcher (EV_A_ (W)w);	1653	verify_watcher (EV_A_ (W)w);
1559	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1654	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1560	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));
1561	}	1656	}
1562		1657
1563	assert (timermax >= timercnt);	1658	assert (timermax >= timercnt);
1564	verify_heap (EV_A_ timers, timercnt);	1659	verify_heap (EV_A_ timers, timercnt);
1565		1660
…		…
1659	{	1754	{
1660	#if EV_MULTIPLICITY	1755	#if EV_MULTIPLICITY
1661	struct ev_loop *loop = ev_default_loop_ptr;	1756	struct ev_loop *loop = ev_default_loop_ptr;
1662	#endif	1757	#endif
1663		1758
1664	ev_loop_fork (EV_A);	1759	postfork = 1; /* must be in line with ev_loop_fork */
1665	}	1760	}
1666		1761
1667	/*****************************************************************************/	1762	/*****************************************************************************/
1668		1763
1669	void	1764	void
1670	ev_invoke (EV_P_ void *w, int revents)	1765	ev_invoke (EV_P_ void *w, int revents)
1671	{	1766	{
1672	EV_CB_INVOKE ((W)w, revents);	1767	EV_CB_INVOKE ((W)w, revents);
1673	}	1768	}
1674		1769
1675	void inline_speed	1770	inline_speed void
1676	call_pending (EV_P)	1771	call_pending (EV_P)
1677	{	1772	{
1678	int pri;	1773	int pri;
1679		1774
1680	for (pri = NUMPRI; pri--; )	1775	for (pri = NUMPRI; pri--; )
1681	while (pendingcnt [pri])	1776	while (pendingcnt [pri])
1682	{	1777	{
1683	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1778	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1684		1779
1685	if (expect_true (p->w))
1686	{
1687	/*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 */
1688		1782
1689	p->w->pending = 0;	1783	p->w->pending = 0;
1690	EV_CB_INVOKE (p->w, p->events);	1784	EV_CB_INVOKE (p->w, p->events);
1691	EV_FREQUENT_CHECK;	1785	EV_FREQUENT_CHECK;
1692	}
1693	}	1786	}
1694	}	1787	}
1695		1788
1696	#if EV_IDLE_ENABLE	1789	#if EV_IDLE_ENABLE
1697	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
1698	idle_reify (EV_P)	1793	idle_reify (EV_P)
1699	{	1794	{
1700	if (expect_false (idleall))	1795	if (expect_false (idleall))
1701	{	1796	{
1702	int pri;	1797	int pri;
…		…
1714	}	1809	}
1715	}	1810	}
1716	}	1811	}
1717	#endif	1812	#endif
1718		1813
1719	void inline_size	1814	/* make timers pending */
		1815	inline_size void
1720	timers_reify (EV_P)	1816	timers_reify (EV_P)
1721	{	1817	{
1722	EV_FREQUENT_CHECK;	1818	EV_FREQUENT_CHECK;
1723		1819
1724	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1820	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1725	{	1821	{
1726	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1822	do
1727
1728	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1729
1730	/* first reschedule or stop timer */
1731	if (w->repeat)
1732	{	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	{
1733	ev_at (w) += w->repeat;	1831	ev_at (w) += w->repeat;
1734	if (ev_at (w) < mn_now)	1832	if (ev_at (w) < mn_now)
1735	ev_at (w) = mn_now;	1833	ev_at (w) = mn_now;
1736		1834
1737	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.));
1738		1836
1739	ANHE_at_cache (timers [HEAP0]);	1837	ANHE_at_cache (timers [HEAP0]);
1740	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);
1741	}	1845	}
1742	else	1846	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1743	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1744		1847
1745	EV_FREQUENT_CHECK;
1746	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1848	feed_reverse_done (EV_A_ EV_TIMEOUT);
1747	}	1849	}
1748	}	1850	}
1749		1851
1750	#if EV_PERIODIC_ENABLE	1852	#if EV_PERIODIC_ENABLE
1751	void inline_size	1853	/* make periodics pending */
		1854	inline_size void
1752	periodics_reify (EV_P)	1855	periodics_reify (EV_P)
1753	{	1856	{
1754	EV_FREQUENT_CHECK;	1857	EV_FREQUENT_CHECK;
1755		1858
1756	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1859	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1757	{	1860	{
1758	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1861	int feed_count = 0;
1759		1862
1760	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1863	do
1761
1762	/* first reschedule or stop timer */
1763	if (w->reschedule_cb)
1764	{	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	{
1765	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1872	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1766		1873
1767	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));
1768		1875
1769	ANHE_at_cache (periodics [HEAP0]);	1876	ANHE_at_cache (periodics [HEAP0]);
1770	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);
1771	}	1903	}
1772	else if (w->interval)	1904	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1773	{
1774	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1775	/* if next trigger time is not sufficiently in the future, put it there */
1776	/* this might happen because of floating point inexactness */
1777	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1778	{
1779	ev_at (w) += w->interval;
1780		1905
1781	/* if interval is unreasonably low we might still have a time in the past */
1782	/* so correct this. this will make the periodic very inexact, but the user */
1783	/* has effectively asked to get triggered more often than possible */
1784	if (ev_at (w) < ev_rt_now)
1785	ev_at (w) = ev_rt_now;
1786	}
1787
1788	ANHE_at_cache (periodics [HEAP0]);
1789	downheap (periodics, periodiccnt, HEAP0);
1790	}
1791	else
1792	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1793
1794	EV_FREQUENT_CHECK;
1795	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1906	feed_reverse_done (EV_A_ EV_PERIODIC);
1796	}	1907	}
1797	}	1908	}
1798		1909
		1910	/* simply recalculate all periodics */
		1911	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1799	static void noinline	1912	static void noinline
1800	periodics_reschedule (EV_P)	1913	periodics_reschedule (EV_P)
1801	{	1914	{
1802	int i;	1915	int i;
1803		1916
…		…
1816		1929
1817	reheap (periodics, periodiccnt);	1930	reheap (periodics, periodiccnt);
1818	}	1931	}
1819	#endif	1932	#endif
1820		1933
1821	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
1822	time_update (EV_P_ ev_tstamp max_block)	1951	time_update (EV_P_ ev_tstamp max_block)
1823	{	1952	{
1824	int i;	1953	int i;
1825		1954
1826	#if EV_USE_MONOTONIC	1955	#if EV_USE_MONOTONIC
…		…
1859	ev_rt_now = ev_time ();	1988	ev_rt_now = ev_time ();
1860	mn_now = get_clock ();	1989	mn_now = get_clock ();
1861	now_floor = mn_now;	1990	now_floor = mn_now;
1862	}	1991	}
1863		1992
		1993	/* no timer adjustment, as the monotonic clock doesn't jump */
		1994	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1864	# if EV_PERIODIC_ENABLE	1995	# if EV_PERIODIC_ENABLE
1865	periodics_reschedule (EV_A);	1996	periodics_reschedule (EV_A);
1866	# endif	1997	# endif
1867	/* no timer adjustment, as the monotonic clock doesn't jump */
1868	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1869	}	1998	}
1870	else	1999	else
1871	#endif	2000	#endif
1872	{	2001	{
1873	ev_rt_now = ev_time ();	2002	ev_rt_now = ev_time ();
1874		2003
1875	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))
1876	{	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);
1877	#if EV_PERIODIC_ENABLE	2008	#if EV_PERIODIC_ENABLE
1878	periodics_reschedule (EV_A);	2009	periodics_reschedule (EV_A);
1879	#endif	2010	#endif
1880	/* adjust timers. this is easy, as the offset is the same for all of them */
1881	for (i = 0; i < timercnt; ++i)
1882	{
1883	ANHE *he = timers + i + HEAP0;
1884	ANHE_w (*he)->at += ev_rt_now - mn_now;
1885	ANHE_at_cache (*he);
1886	}
1887	}	2011	}
1888		2012
1889	mn_now = ev_rt_now;	2013	mn_now = ev_rt_now;
1890	}	2014	}
1891	}
1892
1893	void
1894	ev_ref (EV_P)
1895	{
1896	++activecnt;
1897	}
1898
1899	void
1900	ev_unref (EV_P)
1901	{
1902	--activecnt;
1903	}
1904
1905	void
1906	ev_now_update (EV_P)
1907	{
1908	time_update (EV_A_ 1e100);
1909	}	2015	}
1910		2016
1911	static int loop_done;	2017	static int loop_done;
1912		2018
1913	void	2019	void
…		…
1947	{	2053	{
1948	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2054	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1949	call_pending (EV_A);	2055	call_pending (EV_A);
1950	}	2056	}
1951		2057
1952	if (expect_false (!activecnt))
1953	break;
1954
1955	/* we might have forked, so reify kernel state if necessary */	2058	/* we might have forked, so reify kernel state if necessary */
1956	if (expect_false (postfork))	2059	if (expect_false (postfork))
1957	loop_fork (EV_A);	2060	loop_fork (EV_A);
1958		2061
1959	/* update fd-related kernel structures */	2062	/* update fd-related kernel structures */
…		…
2038	ev_unloop (EV_P_ int how)	2141	ev_unloop (EV_P_ int how)
2039	{	2142	{
2040	loop_done = how;	2143	loop_done = how;
2041	}	2144	}
2042		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
2043	/*****************************************************************************/	2183	/*****************************************************************************/
		2184	/* singly-linked list management, used when the expected list length is short */
2044		2185
2045	void inline_size	2186	inline_size void
2046	wlist_add (WL *head, WL elem)	2187	wlist_add (WL *head, WL elem)
2047	{	2188	{
2048	elem->next = *head;	2189	elem->next = *head;
2049	*head = elem;	2190	*head = elem;
2050	}	2191	}
2051		2192
2052	void inline_size	2193	inline_size void
2053	wlist_del (WL *head, WL elem)	2194	wlist_del (WL *head, WL elem)
2054	{	2195	{
2055	while (*head)	2196	while (*head)
2056	{	2197	{
2057	if (*head == elem)	2198	if (*head == elem)
…		…
2062		2203
2063	head = &(*head)->next;	2204	head = &(*head)->next;
2064	}	2205	}
2065	}	2206	}
2066		2207
2067	void inline_speed	2208	/* internal, faster, version of ev_clear_pending */
		2209	inline_speed void
2068	clear_pending (EV_P_ W w)	2210	clear_pending (EV_P_ W w)
2069	{	2211	{
2070	if (w->pending)	2212	if (w->pending)
2071	{	2213	{
2072	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2214	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2073	w->pending = 0;	2215	w->pending = 0;
2074	}	2216	}
2075	}	2217	}
2076		2218
2077	int	2219	int
…		…
2081	int pending = w_->pending;	2223	int pending = w_->pending;
2082		2224
2083	if (expect_true (pending))	2225	if (expect_true (pending))
2084	{	2226	{
2085	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2227	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2228	p->w = (W)&pending_w;
2086	w_->pending = 0;	2229	w_->pending = 0;
2087	p->w = 0;
2088	return p->events;	2230	return p->events;
2089	}	2231	}
2090	else	2232	else
2091	return 0;	2233	return 0;
2092	}	2234	}
2093		2235
2094	void inline_size	2236	inline_size void
2095	pri_adjust (EV_P_ W w)	2237	pri_adjust (EV_P_ W w)
2096	{	2238	{
2097	int pri = w->priority;	2239	int pri = w->priority;
2098	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2240	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2099	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2241	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2100	w->priority = pri;	2242	w->priority = pri;
2101	}	2243	}
2102		2244
2103	void inline_speed	2245	inline_speed void
2104	ev_start (EV_P_ W w, int active)	2246	ev_start (EV_P_ W w, int active)
2105	{	2247	{
2106	pri_adjust (EV_A_ w);	2248	pri_adjust (EV_A_ w);
2107	w->active = active;	2249	w->active = active;
2108	ev_ref (EV_A);	2250	ev_ref (EV_A);
2109	}	2251	}
2110		2252
2111	void inline_size	2253	inline_size void
2112	ev_stop (EV_P_ W w)	2254	ev_stop (EV_P_ W w)
2113	{	2255	{
2114	ev_unref (EV_A);	2256	ev_unref (EV_A);
2115	w->active = 0;	2257	w->active = 0;
2116	}	2258	}
…		…
2123	int fd = w->fd;	2265	int fd = w->fd;
2124		2266
2125	if (expect_false (ev_is_active (w)))	2267	if (expect_false (ev_is_active (w)))
2126	return;	2268	return;
2127		2269
2128	assert (("ev_io_start called with negative fd", fd >= 0));	2270	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2129	assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));	2271	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2130		2272
2131	EV_FREQUENT_CHECK;	2273	EV_FREQUENT_CHECK;
2132		2274
2133	ev_start (EV_A_ (W)w, 1);	2275	ev_start (EV_A_ (W)w, 1);
2134	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2276	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2135	wlist_add (&anfds[fd].head, (WL)w);	2277	wlist_add (&anfds[fd].head, (WL)w);
2136		2278
2137	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2279	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2138	w->events &= ~EV_IOFDSET;	2280	w->events &= ~EV__IOFDSET;
2139		2281
2140	EV_FREQUENT_CHECK;	2282	EV_FREQUENT_CHECK;
2141	}	2283	}
2142		2284
2143	void noinline	2285	void noinline
…		…
2145	{	2287	{
2146	clear_pending (EV_A_ (W)w);	2288	clear_pending (EV_A_ (W)w);
2147	if (expect_false (!ev_is_active (w)))	2289	if (expect_false (!ev_is_active (w)))
2148	return;	2290	return;
2149		2291
2150	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));
2151		2293
2152	EV_FREQUENT_CHECK;	2294	EV_FREQUENT_CHECK;
2153		2295
2154	wlist_del (&anfds[w->fd].head, (WL)w);	2296	wlist_del (&anfds[w->fd].head, (WL)w);
2155	ev_stop (EV_A_ (W)w);	2297	ev_stop (EV_A_ (W)w);
…		…
2165	if (expect_false (ev_is_active (w)))	2307	if (expect_false (ev_is_active (w)))
2166	return;	2308	return;
2167		2309
2168	ev_at (w) += mn_now;	2310	ev_at (w) += mn_now;
2169		2311
2170	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.));
2171		2313
2172	EV_FREQUENT_CHECK;	2314	EV_FREQUENT_CHECK;
2173		2315
2174	++timercnt;	2316	++timercnt;
2175	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2317	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2178	ANHE_at_cache (timers [ev_active (w)]);	2320	ANHE_at_cache (timers [ev_active (w)]);
2179	upheap (timers, ev_active (w));	2321	upheap (timers, ev_active (w));
2180		2322
2181	EV_FREQUENT_CHECK;	2323	EV_FREQUENT_CHECK;
2182		2324
2183	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2325	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2184	}	2326	}
2185		2327
2186	void noinline	2328	void noinline
2187	ev_timer_stop (EV_P_ ev_timer *w)	2329	ev_timer_stop (EV_P_ ev_timer *w)
2188	{	2330	{
…		…
2193	EV_FREQUENT_CHECK;	2335	EV_FREQUENT_CHECK;
2194		2336
2195	{	2337	{
2196	int active = ev_active (w);	2338	int active = ev_active (w);
2197		2339
2198	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2340	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2199		2341
2200	--timercnt;	2342	--timercnt;
2201		2343
2202	if (expect_true (active < timercnt + HEAP0))	2344	if (expect_true (active < timercnt + HEAP0))
2203	{	2345	{
…		…
2247		2389
2248	if (w->reschedule_cb)	2390	if (w->reschedule_cb)
2249	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2391	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2250	else if (w->interval)	2392	else if (w->interval)
2251	{	2393	{
2252	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.));
2253	/* 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 */
2254	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;
2255	}	2397	}
2256	else	2398	else
2257	ev_at (w) = w->offset;	2399	ev_at (w) = w->offset;
…		…
2265	ANHE_at_cache (periodics [ev_active (w)]);	2407	ANHE_at_cache (periodics [ev_active (w)]);
2266	upheap (periodics, ev_active (w));	2408	upheap (periodics, ev_active (w));
2267		2409
2268	EV_FREQUENT_CHECK;	2410	EV_FREQUENT_CHECK;
2269		2411
2270	/*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));*/
2271	}	2413	}
2272		2414
2273	void noinline	2415	void noinline
2274	ev_periodic_stop (EV_P_ ev_periodic *w)	2416	ev_periodic_stop (EV_P_ ev_periodic *w)
2275	{	2417	{
…		…
2280	EV_FREQUENT_CHECK;	2422	EV_FREQUENT_CHECK;
2281		2423
2282	{	2424	{
2283	int active = ev_active (w);	2425	int active = ev_active (w);
2284		2426
2285	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2427	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2286		2428
2287	--periodiccnt;	2429	--periodiccnt;
2288		2430
2289	if (expect_true (active < periodiccnt + HEAP0))	2431	if (expect_true (active < periodiccnt + HEAP0))
2290	{	2432	{
…		…
2313		2455
2314	void noinline	2456	void noinline
2315	ev_signal_start (EV_P_ ev_signal *w)	2457	ev_signal_start (EV_P_ ev_signal *w)
2316	{	2458	{
2317	#if EV_MULTIPLICITY	2459	#if EV_MULTIPLICITY
2318	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));
2319	#endif	2461	#endif
2320	if (expect_false (ev_is_active (w)))	2462	if (expect_false (ev_is_active (w)))
2321	return;	2463	return;
2322		2464
2323	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));
2324		2466
2325	evpipe_init (EV_A);	2467	evpipe_init (EV_A);
2326		2468
2327	EV_FREQUENT_CHECK;	2469	EV_FREQUENT_CHECK;
2328		2470
…		…
2379		2521
2380	void	2522	void
2381	ev_child_start (EV_P_ ev_child *w)	2523	ev_child_start (EV_P_ ev_child *w)
2382	{	2524	{
2383	#if EV_MULTIPLICITY	2525	#if EV_MULTIPLICITY
2384	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));
2385	#endif	2527	#endif
2386	if (expect_false (ev_is_active (w)))	2528	if (expect_false (ev_is_active (w)))
2387	return;	2529	return;
2388		2530
2389	EV_FREQUENT_CHECK;	2531	EV_FREQUENT_CHECK;
…		…
2414	# ifdef _WIN32	2556	# ifdef _WIN32
2415	# undef lstat	2557	# undef lstat
2416	# define lstat(a,b) _stati64 (a,b)	2558	# define lstat(a,b) _stati64 (a,b)
2417	# endif	2559	# endif
2418		2560
2419	#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 */
2420	#define MIN_STAT_INTERVAL 0.1074891	2563	#define MIN_STAT_INTERVAL 0.1074891
2421		2564
2422	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);
2423		2566
2424	#if EV_USE_INOTIFY	2567	#if EV_USE_INOTIFY
2425	# define EV_INOTIFY_BUFSIZE 8192	2568	# define EV_INOTIFY_BUFSIZE 8192
…		…
2429	{	2572	{
2430	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);
2431		2574
2432	if (w->wd < 0)	2575	if (w->wd < 0)
2433	{	2576	{
		2577	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2434	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 */
2435		2579
2436	/* monitor some parent directory for speedup hints */	2580	/* monitor some parent directory for speedup hints */
2437	/* note that exceeding the hardcoded limit is not a correctness issue, */	2581	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2438	/* but an efficiency issue only */	2582	/* but an efficiency issue only */
2439	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2583	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2440	{	2584	{
2441	char path [4096];	2585	char path [4096];
2442	strcpy (path, w->path);	2586	strcpy (path, w->path);
…		…
2446	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2590	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2447	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2591	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2448		2592
2449	char *pend = strrchr (path, '/');	2593	char *pend = strrchr (path, '/');
2450		2594
2451	if (!pend)	2595	if (!pend || pend == path)
2452	break; /* whoops, no '/', complain to your admin */	2596	break;
2453		2597
2454	*pend = 0;	2598	*pend = 0;
2455	w->wd = inotify_add_watch (fs_fd, path, mask);	2599	w->wd = inotify_add_watch (fs_fd, path, mask);
2456	}	2600	}
2457	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2601	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2458	}	2602	}
2459	}	2603	}
2460	else
2461	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2462		2604
2463	if (w->wd >= 0)	2605	if (w->wd >= 0)
		2606	{
2464	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	}
2465	}	2626	}
2466		2627
2467	static void noinline	2628	static void noinline
2468	infy_del (EV_P_ ev_stat *w)	2629	infy_del (EV_P_ ev_stat *w)
2469	{	2630	{
…		…
2499		2660
2500	if (w->wd == wd || wd == -1)	2661	if (w->wd == wd || wd == -1)
2501	{	2662	{
2502	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2663	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2503	{	2664	{
		2665	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2504	w->wd = -1;	2666	w->wd = -1;
2505	infy_add (EV_A_ w); /* re-add, no matter what */	2667	infy_add (EV_A_ w); /* re-add, no matter what */
2506	}	2668	}
2507		2669
2508	stat_timer_cb (EV_A_ &w->timer, 0);	2670	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2521		2683
2522	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)
2523	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2685	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2524	}	2686	}
2525		2687
2526	void inline_size	2688	inline_size void
2527	infy_init (EV_P)	2689	check_2625 (EV_P)
2528	{	2690	{
2529	if (fs_fd != -2)
2530	return;
2531
2532	/* kernels < 2.6.25 are borked	2691	/* kernels < 2.6.25 are borked
2533	* 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
2534	*/	2693	*/
2535	{
2536	struct utsname buf;	2694	struct utsname buf;
2537	int major, minor, micro;	2695	int major, minor, micro;
2538		2696
2539	fs_fd = -1;
2540
2541	if (uname (&buf))	2697	if (uname (&buf))
2542	return;	2698	return;
2543		2699
2544	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2700	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2545	return;	2701	return;
2546		2702
2547	if (major < 2	2703	if (major < 2
2548	|| (major == 2 && minor < 6)	2704	|| (major == 2 && minor < 6)
2549	|| (major == 2 && minor == 6 && micro < 25))	2705	|| (major == 2 && minor == 6 && micro < 25))
2550	return;	2706	return;
2551	}	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);
2552		2720
2553	fs_fd = inotify_init ();	2721	fs_fd = inotify_init ();
2554		2722
2555	if (fs_fd >= 0)	2723	if (fs_fd >= 0)
2556	{	2724	{
…		…
2558	ev_set_priority (&fs_w, EV_MAXPRI);	2726	ev_set_priority (&fs_w, EV_MAXPRI);
2559	ev_io_start (EV_A_ &fs_w);	2727	ev_io_start (EV_A_ &fs_w);
2560	}	2728	}
2561	}	2729	}
2562		2730
2563	void inline_size	2731	inline_size void
2564	infy_fork (EV_P)	2732	infy_fork (EV_P)
2565	{	2733	{
2566	int slot;	2734	int slot;
2567		2735
2568	if (fs_fd < 0)	2736	if (fs_fd < 0)
…		…
2584	w->wd = -1;	2752	w->wd = -1;
2585		2753
2586	if (fs_fd >= 0)	2754	if (fs_fd >= 0)
2587	infy_add (EV_A_ w); /* re-add, no matter what */	2755	infy_add (EV_A_ w); /* re-add, no matter what */
2588	else	2756	else
2589	ev_timer_start (EV_A_ &w->timer);	2757	ev_timer_again (EV_A_ &w->timer);
2590	}	2758	}
2591	}	2759	}
2592	}	2760	}
2593		2761
2594	#endif	2762	#endif
…		…
2649	ev_stat_start (EV_P_ ev_stat *w)	2817	ev_stat_start (EV_P_ ev_stat *w)
2650	{	2818	{
2651	if (expect_false (ev_is_active (w)))	2819	if (expect_false (ev_is_active (w)))
2652	return;	2820	return;
2653		2821
2654	/* since we use memcmp, we need to clear any padding data etc. */
2655	memset (&w->prev, 0, sizeof (ev_statdata));
2656	memset (&w->attr, 0, sizeof (ev_statdata));
2657
2658	ev_stat_stat (EV_A_ w);	2822	ev_stat_stat (EV_A_ w);
2659		2823
		2824	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2660	if (w->interval < MIN_STAT_INTERVAL)	2825	w->interval = MIN_STAT_INTERVAL;
2661	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2662		2826
2663	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);
2664	ev_set_priority (&w->timer, ev_priority (w));	2828	ev_set_priority (&w->timer, ev_priority (w));
2665		2829
2666	#if EV_USE_INOTIFY	2830	#if EV_USE_INOTIFY
2667	infy_init (EV_A);	2831	infy_init (EV_A);
2668		2832
2669	if (fs_fd >= 0)	2833	if (fs_fd >= 0)
2670	infy_add (EV_A_ w);	2834	infy_add (EV_A_ w);
2671	else	2835	else
2672	#endif	2836	#endif
2673	ev_timer_start (EV_A_ &w->timer);	2837	ev_timer_again (EV_A_ &w->timer);
2674		2838
2675	ev_start (EV_A_ (W)w, 1);	2839	ev_start (EV_A_ (W)w, 1);
2676		2840
2677	EV_FREQUENT_CHECK;	2841	EV_FREQUENT_CHECK;
2678	}	2842	}
…		…
2853	static void	3017	static void
2854	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3018	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2855	{	3019	{
2856	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));
2857		3021
		3022	ev_embed_stop (EV_A_ w);
		3023
2858	{	3024	{
2859	struct ev_loop *loop = w->other;	3025	struct ev_loop *loop = w->other;
2860		3026
2861	ev_loop_fork (EV_A);	3027	ev_loop_fork (EV_A);
		3028	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2862	}	3029	}
		3030
		3031	ev_embed_start (EV_A_ w);
2863	}	3032	}
2864		3033
2865	#if 0	3034	#if 0
2866	static void	3035	static void
2867	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3036	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2876	if (expect_false (ev_is_active (w)))	3045	if (expect_false (ev_is_active (w)))
2877	return;	3046	return;
2878		3047
2879	{	3048	{
2880	struct ev_loop *loop = w->other;	3049	struct ev_loop *loop = w->other;
2881	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 ()));
2882	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);
2883	}	3052	}
2884		3053
2885	EV_FREQUENT_CHECK;	3054	EV_FREQUENT_CHECK;
2886		3055
…		…
3069	ev_timer_set (&once->to, timeout, 0.);	3238	ev_timer_set (&once->to, timeout, 0.);
3070	ev_timer_start (EV_A_ &once->to);	3239	ev_timer_start (EV_A_ &once->to);
3071	}	3240	}
3072	}	3241	}
3073		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
3074	#if EV_MULTIPLICITY	3351	#if EV_MULTIPLICITY
3075	#include "ev_wrap.h"	3352	#include "ev_wrap.h"
3076	#endif	3353	#endif
3077		3354
3078	#ifdef __cplusplus	3355	#ifdef __cplusplus

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