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Comparing libev/ev.c (file contents):
Revision 1.268 by root, Mon Oct 27 13:39:18 2008 UTC vs.
Revision 1.289 by root, Sat Jun 6 11:13:16 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 */
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 */
		490	unsigned char unused;
		491	#if EV_USE_EPOLL
455	unsigned char egen; /* generation counter to counter epoll bugs */	492	unsigned int egen; /* generation counter to counter epoll bugs */
		493	#endif
456	#if EV_SELECT_IS_WINSOCKET	494	#if EV_SELECT_IS_WINSOCKET
457	SOCKET handle;	495	SOCKET handle;
458	#endif	496	#endif
459	} ANFD;	497	} ANFD;
460		498
		499	/* stores the pending event set for a given watcher */
461	typedef struct	500	typedef struct
462	{	501	{
463	W w;	502	W w;
464	int events;	503	int events; /* the pending event set for the given watcher */
465	} ANPENDING;	504	} ANPENDING;
466		505
467	#if EV_USE_INOTIFY	506	#if EV_USE_INOTIFY
468	/* hash table entry per inotify-id */	507	/* hash table entry per inotify-id */
469	typedef struct	508	typedef struct
…		…
472	} ANFS;	511	} ANFS;
473	#endif	512	#endif
474		513
475	/* Heap Entry */	514	/* Heap Entry */
476	#if EV_HEAP_CACHE_AT	515	#if EV_HEAP_CACHE_AT
		516	/* a heap element */
477	typedef struct {	517	typedef struct {
478	ev_tstamp at;	518	ev_tstamp at;
479	WT w;	519	WT w;
480	} ANHE;	520	} ANHE;
481		521
482	#define ANHE_w(he) (he).w /* access watcher, read-write */	522	#define ANHE_w(he) (he).w /* access watcher, read-write */
483	#define ANHE_at(he) (he).at /* access cached at, read-only */	523	#define ANHE_at(he) (he).at /* access cached at, read-only */
484	#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 */
485	#else	525	#else
		526	/* a heap element */
486	typedef WT ANHE;	527	typedef WT ANHE;
487		528
488	#define ANHE_w(he) (he)	529	#define ANHE_w(he) (he)
489	#define ANHE_at(he) (he)->at	530	#define ANHE_at(he) (he)->at
490	#define ANHE_at_cache(he)	531	#define ANHE_at_cache(he)
…		…
520		561
521	ev_tstamp	562	ev_tstamp
522	ev_time (void)	563	ev_time (void)
523	{	564	{
524	#if EV_USE_REALTIME	565	#if EV_USE_REALTIME
		566	if (expect_true (have_realtime))
		567	{
525	struct timespec ts;	568	struct timespec ts;
526	clock_gettime (CLOCK_REALTIME, &ts);	569	clock_gettime (CLOCK_REALTIME, &ts);
527	return ts.tv_sec + ts.tv_nsec * 1e-9;	570	return ts.tv_sec + ts.tv_nsec * 1e-9;
528	#else	571	}
		572	#endif
		573
529	struct timeval tv;	574	struct timeval tv;
530	gettimeofday (&tv, 0);	575	gettimeofday (&tv, 0);
531	return tv.tv_sec + tv.tv_usec * 1e-6;	576	return tv.tv_sec + tv.tv_usec * 1e-6;
532	#endif
533	}	577	}
534		578
535	ev_tstamp inline_size	579	inline_size ev_tstamp
536	get_clock (void)	580	get_clock (void)
537	{	581	{
538	#if EV_USE_MONOTONIC	582	#if EV_USE_MONOTONIC
539	if (expect_true (have_monotonic))	583	if (expect_true (have_monotonic))
540	{	584	{
…		…
585		629
586	/*****************************************************************************/	630	/*****************************************************************************/
587		631
588	#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 */
589		633
590	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
591	array_nextsize (int elem, int cur, int cnt)	637	array_nextsize (int elem, int cur, int cnt)
592	{	638	{
593	int ncur = cur + 1;	639	int ncur = cur + 1;
594		640
595	do	641	do
…		…
636	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	682	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
637	}	683	}
638	#endif	684	#endif
639		685
640	#define array_free(stem, idx) \	686	#define array_free(stem, idx) \
641	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
642		688
643	/*****************************************************************************/	689	/*****************************************************************************/
		690
		691	/* dummy callback for pending events */
		692	static void noinline
		693	pendingcb (EV_P_ ev_prepare *w, int revents)
		694	{
		695	}
644		696
645	void noinline	697	void noinline
646	ev_feed_event (EV_P_ void *w, int revents)	698	ev_feed_event (EV_P_ void *w, int revents)
647	{	699	{
648	W w_ = (W)w;	700	W w_ = (W)w;
…		…
657	pendings [pri][w_->pending - 1].w = w_;	709	pendings [pri][w_->pending - 1].w = w_;
658	pendings [pri][w_->pending - 1].events = revents;	710	pendings [pri][w_->pending - 1].events = revents;
659	}	711	}
660	}	712	}
661		713
662	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
663	queue_events (EV_P_ W *events, int eventcnt, int type)	730	queue_events (EV_P_ W *events, int eventcnt, int type)
664	{	731	{
665	int i;	732	int i;
666		733
667	for (i = 0; i < eventcnt; ++i)	734	for (i = 0; i < eventcnt; ++i)
668	ev_feed_event (EV_A_ events [i], type);	735	ev_feed_event (EV_A_ events [i], type);
669	}	736	}
670		737
671	/*****************************************************************************/	738	/*****************************************************************************/
672		739
673	void inline_speed	740	inline_speed void
674	fd_event (EV_P_ int fd, int revents)	741	fd_event (EV_P_ int fd, int revents)
675	{	742	{
676	ANFD *anfd = anfds + fd;	743	ANFD *anfd = anfds + fd;
677	ev_io *w;	744	ev_io *w;
678		745
…		…
690	{	757	{
691	if (fd >= 0 && fd < anfdmax)	758	if (fd >= 0 && fd < anfdmax)
692	fd_event (EV_A_ fd, revents);	759	fd_event (EV_A_ fd, revents);
693	}	760	}
694		761
695	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
696	fd_reify (EV_P)	765	fd_reify (EV_P)
697	{	766	{
698	int i;	767	int i;
699		768
700	for (i = 0; i < fdchangecnt; ++i)	769	for (i = 0; i < fdchangecnt; ++i)
…		…
715	#ifdef EV_FD_TO_WIN32_HANDLE	784	#ifdef EV_FD_TO_WIN32_HANDLE
716	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	785	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717	#else	786	#else
718	anfd->handle = _get_osfhandle (fd);	787	anfd->handle = _get_osfhandle (fd);
719	#endif	788	#endif
720	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));
721	}	790	}
722	#endif	791	#endif
723		792
724	{	793	{
725	unsigned char o_events = anfd->events;	794	unsigned char o_events = anfd->events;
726	unsigned char o_reify = anfd->reify;	795	unsigned char o_reify = anfd->reify;
727		796
728	anfd->reify = 0;	797	anfd->reify = 0;
729	anfd->events = events;	798	anfd->events = events;
730		799
731	if (o_events != events || o_reify & EV_IOFDSET)	800	if (o_events != events || o_reify & EV__IOFDSET)
732	backend_modify (EV_A_ fd, o_events, events);	801	backend_modify (EV_A_ fd, o_events, events);
733	}	802	}
734	}	803	}
735		804
736	fdchangecnt = 0;	805	fdchangecnt = 0;
737	}	806	}
738		807
739	void inline_size	808	/* something about the given fd changed */
		809	inline_size void
740	fd_change (EV_P_ int fd, int flags)	810	fd_change (EV_P_ int fd, int flags)
741	{	811	{
742	unsigned char reify = anfds [fd].reify;	812	unsigned char reify = anfds [fd].reify;
743	anfds [fd].reify |= flags;	813	anfds [fd].reify |= flags;
744		814
…		…
748	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	818	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
749	fdchanges [fdchangecnt - 1] = fd;	819	fdchanges [fdchangecnt - 1] = fd;
750	}	820	}
751	}	821	}
752		822
753	void inline_speed	823	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		824	inline_speed void
754	fd_kill (EV_P_ int fd)	825	fd_kill (EV_P_ int fd)
755	{	826	{
756	ev_io *w;	827	ev_io *w;
757		828
758	while ((w = (ev_io *)anfds [fd].head))	829	while ((w = (ev_io *)anfds [fd].head))
…		…
760	ev_io_stop (EV_A_ w);	831	ev_io_stop (EV_A_ w);
761	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);
762	}	833	}
763	}	834	}
764		835
765	int inline_size	836	/* check whether the given fd is atcually valid, for error recovery */
		837	inline_size int
766	fd_valid (int fd)	838	fd_valid (int fd)
767	{	839	{
768	#ifdef _WIN32	840	#ifdef _WIN32
769	return _get_osfhandle (fd) != -1;	841	return _get_osfhandle (fd) != -1;
770	#else	842	#else
…		…
807	for (fd = 0; fd < anfdmax; ++fd)	879	for (fd = 0; fd < anfdmax; ++fd)
808	if (anfds [fd].events)	880	if (anfds [fd].events)
809	{	881	{
810	anfds [fd].events = 0;	882	anfds [fd].events = 0;
811	anfds [fd].emask = 0;	883	anfds [fd].emask = 0;
812	fd_change (EV_A_ fd, EV_IOFDSET | 1);	884	fd_change (EV_A_ fd, EV__IOFDSET | 1);
813	}	885	}
814	}	886	}
815		887
816	/*****************************************************************************/	888	/*****************************************************************************/
817		889
…		…
833	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	905	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
834	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	906	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
835	#define UPHEAP_DONE(p,k) ((p) == (k))	907	#define UPHEAP_DONE(p,k) ((p) == (k))
836		908
837	/* away from the root */	909	/* away from the root */
838	void inline_speed	910	inline_speed void
839	downheap (ANHE *heap, int N, int k)	911	downheap (ANHE *heap, int N, int k)
840	{	912	{
841	ANHE he = heap [k];	913	ANHE he = heap [k];
842	ANHE *E = heap + N + HEAP0;	914	ANHE *E = heap + N + HEAP0;
843		915
…		…
883	#define HEAP0 1	955	#define HEAP0 1
884	#define HPARENT(k) ((k) >> 1)	956	#define HPARENT(k) ((k) >> 1)
885	#define UPHEAP_DONE(p,k) (!(p))	957	#define UPHEAP_DONE(p,k) (!(p))
886		958
887	/* away from the root */	959	/* away from the root */
888	void inline_speed	960	inline_speed void
889	downheap (ANHE *heap, int N, int k)	961	downheap (ANHE *heap, int N, int k)
890	{	962	{
891	ANHE he = heap [k];	963	ANHE he = heap [k];
892		964
893	for (;;)	965	for (;;)
…		…
913	ev_active (ANHE_w (he)) = k;	985	ev_active (ANHE_w (he)) = k;
914	}	986	}
915	#endif	987	#endif
916		988
917	/* towards the root */	989	/* towards the root */
918	void inline_speed	990	inline_speed void
919	upheap (ANHE *heap, int k)	991	upheap (ANHE *heap, int k)
920	{	992	{
921	ANHE he = heap [k];	993	ANHE he = heap [k];
922		994
923	for (;;)	995	for (;;)
…		…
934		1006
935	heap [k] = he;	1007	heap [k] = he;
936	ev_active (ANHE_w (he)) = k;	1008	ev_active (ANHE_w (he)) = k;
937	}	1009	}
938		1010
939	void inline_size	1011	/* move an element suitably so it is in a correct place */
		1012	inline_size void
940	adjustheap (ANHE *heap, int N, int k)	1013	adjustheap (ANHE *heap, int N, int k)
941	{	1014	{
942	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]))
943	upheap (heap, k);	1016	upheap (heap, k);
944	else	1017	else
945	downheap (heap, N, k);	1018	downheap (heap, N, k);
946	}	1019	}
947		1020
948	/* 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 */
949	void inline_size	1022	inline_size void
950	reheap (ANHE *heap, int N)	1023	reheap (ANHE *heap, int N)
951	{	1024	{
952	int i;	1025	int i;
953		1026
954	/* 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 */
…		…
957	upheap (heap, i + HEAP0);	1030	upheap (heap, i + HEAP0);
958	}	1031	}
959		1032
960	/*****************************************************************************/	1033	/*****************************************************************************/
961		1034
		1035	/* associate signal watchers to a signal signal */
962	typedef struct	1036	typedef struct
963	{	1037	{
964	WL head;	1038	WL head;
965	EV_ATOMIC_T gotsig;	1039	EV_ATOMIC_T gotsig;
966	} ANSIG;	1040	} ANSIG;
…		…
970		1044
971	static EV_ATOMIC_T gotsig;	1045	static EV_ATOMIC_T gotsig;
972		1046
973	/*****************************************************************************/	1047	/*****************************************************************************/
974		1048
975	void inline_speed	1049	/* used to prepare libev internal fd's */
		1050	/* this is not fork-safe */
		1051	inline_speed void
976	fd_intern (int fd)	1052	fd_intern (int fd)
977	{	1053	{
978	#ifdef _WIN32	1054	#ifdef _WIN32
979	unsigned long arg = 1;	1055	unsigned long arg = 1;
980	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1056	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
985	}	1061	}
986		1062
987	static void noinline	1063	static void noinline
988	evpipe_init (EV_P)	1064	evpipe_init (EV_P)
989	{	1065	{
990	if (!ev_is_active (&pipeev))	1066	if (!ev_is_active (&pipe_w))
991	{	1067	{
992	#if EV_USE_EVENTFD	1068	#if EV_USE_EVENTFD
993	if ((evfd = eventfd (0, 0)) >= 0)	1069	if ((evfd = eventfd (0, 0)) >= 0)
994	{	1070	{
995	evpipe [0] = -1;	1071	evpipe [0] = -1;
996	fd_intern (evfd);	1072	fd_intern (evfd);
997	ev_io_set (&pipeev, evfd, EV_READ);	1073	ev_io_set (&pipe_w, evfd, EV_READ);
998	}	1074	}
999	else	1075	else
1000	#endif	1076	#endif
1001	{	1077	{
1002	while (pipe (evpipe))	1078	while (pipe (evpipe))
1003	syserr ("(libev) error creating signal/async pipe");	1079	ev_syserr ("(libev) error creating signal/async pipe");
1004		1080
1005	fd_intern (evpipe [0]);	1081	fd_intern (evpipe [0]);
1006	fd_intern (evpipe [1]);	1082	fd_intern (evpipe [1]);
1007	ev_io_set (&pipeev, evpipe [0], EV_READ);	1083	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1008	}	1084	}
1009		1085
1010	ev_io_start (EV_A_ &pipeev);	1086	ev_io_start (EV_A_ &pipe_w);
1011	ev_unref (EV_A); /* watcher should not keep loop alive */	1087	ev_unref (EV_A); /* watcher should not keep loop alive */
1012	}	1088	}
1013	}	1089	}
1014		1090
1015	void inline_size	1091	inline_size void
1016	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1092	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1017	{	1093	{
1018	if (!*flag)	1094	if (!*flag)
1019	{	1095	{
1020	int old_errno = errno; /* save errno because write might clobber it */	1096	int old_errno = errno; /* save errno because write might clobber it */
…		…
1033		1109
1034	errno = old_errno;	1110	errno = old_errno;
1035	}	1111	}
1036	}	1112	}
1037		1113
		1114	/* called whenever the libev signal pipe */
		1115	/* got some events (signal, async) */
1038	static void	1116	static void
1039	pipecb (EV_P_ ev_io *iow, int revents)	1117	pipecb (EV_P_ ev_io *iow, int revents)
1040	{	1118	{
1041	#if EV_USE_EVENTFD	1119	#if EV_USE_EVENTFD
1042	if (evfd >= 0)	1120	if (evfd >= 0)
…		…
1098	ev_feed_signal_event (EV_P_ int signum)	1176	ev_feed_signal_event (EV_P_ int signum)
1099	{	1177	{
1100	WL w;	1178	WL w;
1101		1179
1102	#if EV_MULTIPLICITY	1180	#if EV_MULTIPLICITY
1103	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));
1104	#endif	1182	#endif
1105		1183
1106	--signum;	1184	--signum;
1107		1185
1108	if (signum < 0 || signum >= signalmax)	1186	if (signum < 0 || signum >= signalmax)
…		…
1124		1202
1125	#ifndef WIFCONTINUED	1203	#ifndef WIFCONTINUED
1126	# define WIFCONTINUED(status) 0	1204	# define WIFCONTINUED(status) 0
1127	#endif	1205	#endif
1128		1206
1129	void inline_speed	1207	/* handle a single child status event */
		1208	inline_speed void
1130	child_reap (EV_P_ int chain, int pid, int status)	1209	child_reap (EV_P_ int chain, int pid, int status)
1131	{	1210	{
1132	ev_child *w;	1211	ev_child *w;
1133	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1212	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1134		1213
…		…
1147		1226
1148	#ifndef WCONTINUED	1227	#ifndef WCONTINUED
1149	# define WCONTINUED 0	1228	# define WCONTINUED 0
1150	#endif	1229	#endif
1151		1230
		1231	/* called on sigchld etc., calls waitpid */
1152	static void	1232	static void
1153	childcb (EV_P_ ev_signal *sw, int revents)	1233	childcb (EV_P_ ev_signal *sw, int revents)
1154	{	1234	{
1155	int pid, status;	1235	int pid, status;
1156		1236
…		…
1237	/* kqueue is borked on everything but netbsd apparently */	1317	/* kqueue is borked on everything but netbsd apparently */
1238	/* 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 */
1239	flags &= ~EVBACKEND_KQUEUE;	1319	flags &= ~EVBACKEND_KQUEUE;
1240	#endif	1320	#endif
1241	#ifdef __APPLE__	1321	#ifdef __APPLE__
1242	// flags &= ~EVBACKEND_KQUEUE; for documentation	1322	/* only select works correctly on that "unix-certified" platform */
1243	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 */
1244	#endif	1325	#endif
1245		1326
1246	return flags;	1327	return flags;
1247	}	1328	}
1248		1329
…		…
1280	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1361	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1281	{	1362	{
1282	timeout_blocktime = interval;	1363	timeout_blocktime = interval;
1283	}	1364	}
1284		1365
		1366	/* initialise a loop structure, must be zero-initialised */
1285	static void noinline	1367	static void noinline
1286	loop_init (EV_P_ unsigned int flags)	1368	loop_init (EV_P_ unsigned int flags)
1287	{	1369	{
1288	if (!backend)	1370	if (!backend)
1289	{	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
1290	#if EV_USE_MONOTONIC	1382	#if EV_USE_MONOTONIC
		1383	if (!have_monotonic)
1291	{	1384	{
1292	struct timespec ts;	1385	struct timespec ts;
		1386
1293	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1387	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1294	have_monotonic = 1;	1388	have_monotonic = 1;
1295	}	1389	}
1296	#endif	1390	#endif
1297		1391
1298	ev_rt_now = ev_time ();	1392	ev_rt_now = ev_time ();
1299	mn_now = get_clock ();	1393	mn_now = get_clock ();
1300	now_floor = mn_now;	1394	now_floor = mn_now;
…		…
1337	#endif	1431	#endif
1338	#if EV_USE_SELECT	1432	#if EV_USE_SELECT
1339	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1433	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1340	#endif	1434	#endif
1341		1435
		1436	ev_prepare_init (&pending_w, pendingcb);
		1437
1342	ev_init (&pipeev, pipecb);	1438	ev_init (&pipe_w, pipecb);
1343	ev_set_priority (&pipeev, EV_MAXPRI);	1439	ev_set_priority (&pipe_w, EV_MAXPRI);
1344	}	1440	}
1345	}	1441	}
1346		1442
		1443	/* free up a loop structure */
1347	static void noinline	1444	static void noinline
1348	loop_destroy (EV_P)	1445	loop_destroy (EV_P)
1349	{	1446	{
1350	int i;	1447	int i;
1351		1448
1352	if (ev_is_active (&pipeev))	1449	if (ev_is_active (&pipe_w))
1353	{	1450	{
1354	ev_ref (EV_A); /* signal watcher */	1451	ev_ref (EV_A); /* signal watcher */
1355	ev_io_stop (EV_A_ &pipeev);	1452	ev_io_stop (EV_A_ &pipe_w);
1356		1453
1357	#if EV_USE_EVENTFD	1454	#if EV_USE_EVENTFD
1358	if (evfd >= 0)	1455	if (evfd >= 0)
1359	close (evfd);	1456	close (evfd);
1360	#endif	1457	#endif
…		…
1399	}	1496	}
1400		1497
1401	ev_free (anfds); anfdmax = 0;	1498	ev_free (anfds); anfdmax = 0;
1402		1499
1403	/* 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);
1404	array_free (fdchange, EMPTY);	1502	array_free (fdchange, EMPTY);
1405	array_free (timer, EMPTY);	1503	array_free (timer, EMPTY);
1406	#if EV_PERIODIC_ENABLE	1504	#if EV_PERIODIC_ENABLE
1407	array_free (periodic, EMPTY);	1505	array_free (periodic, EMPTY);
1408	#endif	1506	#endif
…		…
1417		1515
1418	backend = 0;	1516	backend = 0;
1419	}	1517	}
1420		1518
1421	#if EV_USE_INOTIFY	1519	#if EV_USE_INOTIFY
1422	void inline_size infy_fork (EV_P);	1520	inline_size void infy_fork (EV_P);
1423	#endif	1521	#endif
1424		1522
1425	void inline_size	1523	inline_size void
1426	loop_fork (EV_P)	1524	loop_fork (EV_P)
1427	{	1525	{
1428	#if EV_USE_PORT	1526	#if EV_USE_PORT
1429	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1527	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1430	#endif	1528	#endif
…		…
1436	#endif	1534	#endif
1437	#if EV_USE_INOTIFY	1535	#if EV_USE_INOTIFY
1438	infy_fork (EV_A);	1536	infy_fork (EV_A);
1439	#endif	1537	#endif
1440		1538
1441	if (ev_is_active (&pipeev))	1539	if (ev_is_active (&pipe_w))
1442	{	1540	{
1443	/* this "locks" the handlers against writing to the pipe */	1541	/* this "locks" the handlers against writing to the pipe */
1444	/* while we modify the fd vars */	1542	/* while we modify the fd vars */
1445	gotsig = 1;	1543	gotsig = 1;
1446	#if EV_ASYNC_ENABLE	1544	#if EV_ASYNC_ENABLE
1447	gotasync = 1;	1545	gotasync = 1;
1448	#endif	1546	#endif
1449		1547
1450	ev_ref (EV_A);	1548	ev_ref (EV_A);
1451	ev_io_stop (EV_A_ &pipeev);	1549	ev_io_stop (EV_A_ &pipe_w);
1452		1550
1453	#if EV_USE_EVENTFD	1551	#if EV_USE_EVENTFD
1454	if (evfd >= 0)	1552	if (evfd >= 0)
1455	close (evfd);	1553	close (evfd);
1456	#endif	1554	#endif
…		…
1461	close (evpipe [1]);	1559	close (evpipe [1]);
1462	}	1560	}
1463		1561
1464	evpipe_init (EV_A);	1562	evpipe_init (EV_A);
1465	/* now iterate over everything, in case we missed something */	1563	/* now iterate over everything, in case we missed something */
1466	pipecb (EV_A_ &pipeev, EV_READ);	1564	pipecb (EV_A_ &pipe_w, EV_READ);
1467	}	1565	}
1468		1566
1469	postfork = 0;	1567	postfork = 0;
1470	}	1568	}
1471		1569
…		…
1501		1599
1502	#if EV_VERIFY	1600	#if EV_VERIFY
1503	static void noinline	1601	static void noinline
1504	verify_watcher (EV_P_ W w)	1602	verify_watcher (EV_P_ W w)
1505	{	1603	{
1506	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1604	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1507		1605
1508	if (w->pending)	1606	if (w->pending)
1509	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));
1510	}	1608	}
1511		1609
1512	static void noinline	1610	static void noinline
1513	verify_heap (EV_P_ ANHE *heap, int N)	1611	verify_heap (EV_P_ ANHE *heap, int N)
1514	{	1612	{
1515	int i;	1613	int i;
1516		1614
1517	for (i = HEAP0; i < N + HEAP0; ++i)	1615	for (i = HEAP0; i < N + HEAP0; ++i)
1518	{	1616	{
1519	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));
1520	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])));
1521	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]))));
1522		1620
1523	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1621	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1524	}	1622	}
1525	}	1623	}
1526		1624
1527	static void noinline	1625	static void noinline
1528	array_verify (EV_P_ W *ws, int cnt)	1626	array_verify (EV_P_ W *ws, int cnt)
1529	{	1627	{
1530	while (cnt--)	1628	while (cnt--)
1531	{	1629	{
1532	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1630	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1533	verify_watcher (EV_A_ ws [cnt]);	1631	verify_watcher (EV_A_ ws [cnt]);
1534	}	1632	}
1535	}	1633	}
1536	#endif	1634	#endif
1537		1635
…		…
1544		1642
1545	assert (activecnt >= -1);	1643	assert (activecnt >= -1);
1546		1644
1547	assert (fdchangemax >= fdchangecnt);	1645	assert (fdchangemax >= fdchangecnt);
1548	for (i = 0; i < fdchangecnt; ++i)	1646	for (i = 0; i < fdchangecnt; ++i)
1549	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1647	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1550		1648
1551	assert (anfdmax >= 0);	1649	assert (anfdmax >= 0);
1552	for (i = 0; i < anfdmax; ++i)	1650	for (i = 0; i < anfdmax; ++i)
1553	for (w = anfds [i].head; w; w = w->next)	1651	for (w = anfds [i].head; w; w = w->next)
1554	{	1652	{
1555	verify_watcher (EV_A_ (W)w);	1653	verify_watcher (EV_A_ (W)w);
1556	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1654	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1557	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));
1558	}	1656	}
1559		1657
1560	assert (timermax >= timercnt);	1658	assert (timermax >= timercnt);
1561	verify_heap (EV_A_ timers, timercnt);	1659	verify_heap (EV_A_ timers, timercnt);
1562		1660
…		…
1656	{	1754	{
1657	#if EV_MULTIPLICITY	1755	#if EV_MULTIPLICITY
1658	struct ev_loop *loop = ev_default_loop_ptr;	1756	struct ev_loop *loop = ev_default_loop_ptr;
1659	#endif	1757	#endif
1660		1758
1661	if (backend)
1662	postfork = 1; /* must be in line with ev_loop_fork */	1759	postfork = 1; /* must be in line with ev_loop_fork */
1663	}	1760	}
1664		1761
1665	/*****************************************************************************/	1762	/*****************************************************************************/
1666		1763
1667	void	1764	void
1668	ev_invoke (EV_P_ void *w, int revents)	1765	ev_invoke (EV_P_ void *w, int revents)
1669	{	1766	{
1670	EV_CB_INVOKE ((W)w, revents);	1767	EV_CB_INVOKE ((W)w, revents);
1671	}	1768	}
1672		1769
1673	void inline_speed	1770	inline_speed void
1674	call_pending (EV_P)	1771	call_pending (EV_P)
1675	{	1772	{
1676	int pri;	1773	int pri;
1677		1774
1678	for (pri = NUMPRI; pri--; )	1775	for (pri = NUMPRI; pri--; )
1679	while (pendingcnt [pri])	1776	while (pendingcnt [pri])
1680	{	1777	{
1681	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1778	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1682		1779
1683	if (expect_true (p->w))
1684	{
1685	/*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 */
1686		1782
1687	p->w->pending = 0;	1783	p->w->pending = 0;
1688	EV_CB_INVOKE (p->w, p->events);	1784	EV_CB_INVOKE (p->w, p->events);
1689	EV_FREQUENT_CHECK;	1785	EV_FREQUENT_CHECK;
1690	}
1691	}	1786	}
1692	}	1787	}
1693		1788
1694	#if EV_IDLE_ENABLE	1789	#if EV_IDLE_ENABLE
1695	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
1696	idle_reify (EV_P)	1793	idle_reify (EV_P)
1697	{	1794	{
1698	if (expect_false (idleall))	1795	if (expect_false (idleall))
1699	{	1796	{
1700	int pri;	1797	int pri;
…		…
1712	}	1809	}
1713	}	1810	}
1714	}	1811	}
1715	#endif	1812	#endif
1716		1813
1717	void inline_size	1814	/* make timers pending */
		1815	inline_size void
1718	timers_reify (EV_P)	1816	timers_reify (EV_P)
1719	{	1817	{
1720	EV_FREQUENT_CHECK;	1818	EV_FREQUENT_CHECK;
1721		1819
1722	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1820	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1723	{	1821	{
1724	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1822	do
1725
1726	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1727
1728	/* first reschedule or stop timer */
1729	if (w->repeat)
1730	{	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	{
1731	ev_at (w) += w->repeat;	1831	ev_at (w) += w->repeat;
1732	if (ev_at (w) < mn_now)	1832	if (ev_at (w) < mn_now)
1733	ev_at (w) = mn_now;	1833	ev_at (w) = mn_now;
1734		1834
1735	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.));
1736		1836
1737	ANHE_at_cache (timers [HEAP0]);	1837	ANHE_at_cache (timers [HEAP0]);
1738	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);
1739	}	1845	}
1740	else	1846	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1741	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1742		1847
1743	EV_FREQUENT_CHECK;
1744	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1848	feed_reverse_done (EV_A_ EV_TIMEOUT);
1745	}	1849	}
1746	}	1850	}
1747		1851
1748	#if EV_PERIODIC_ENABLE	1852	#if EV_PERIODIC_ENABLE
1749	void inline_size	1853	/* make periodics pending */
		1854	inline_size void
1750	periodics_reify (EV_P)	1855	periodics_reify (EV_P)
1751	{	1856	{
1752	EV_FREQUENT_CHECK;	1857	EV_FREQUENT_CHECK;
1753		1858
1754	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1859	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1755	{	1860	{
1756	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1861	int feed_count = 0;
1757		1862
1758	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1863	do
1759
1760	/* first reschedule or stop timer */
1761	if (w->reschedule_cb)
1762	{	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	{
1763	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1872	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1764		1873
1765	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));
1766		1875
1767	ANHE_at_cache (periodics [HEAP0]);	1876	ANHE_at_cache (periodics [HEAP0]);
1768	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);
1769	}	1903	}
1770	else if (w->interval)	1904	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1771	{
1772	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1773	/* if next trigger time is not sufficiently in the future, put it there */
1774	/* this might happen because of floating point inexactness */
1775	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1776	{
1777	ev_at (w) += w->interval;
1778		1905
1779	/* if interval is unreasonably low we might still have a time in the past */
1780	/* so correct this. this will make the periodic very inexact, but the user */
1781	/* has effectively asked to get triggered more often than possible */
1782	if (ev_at (w) < ev_rt_now)
1783	ev_at (w) = ev_rt_now;
1784	}
1785
1786	ANHE_at_cache (periodics [HEAP0]);
1787	downheap (periodics, periodiccnt, HEAP0);
1788	}
1789	else
1790	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1791
1792	EV_FREQUENT_CHECK;
1793	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1906	feed_reverse_done (EV_A_ EV_PERIODIC);
1794	}	1907	}
1795	}	1908	}
1796		1909
		1910	/* simply recalculate all periodics */
		1911	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1797	static void noinline	1912	static void noinline
1798	periodics_reschedule (EV_P)	1913	periodics_reschedule (EV_P)
1799	{	1914	{
1800	int i;	1915	int i;
1801		1916
…		…
1814		1929
1815	reheap (periodics, periodiccnt);	1930	reheap (periodics, periodiccnt);
1816	}	1931	}
1817	#endif	1932	#endif
1818		1933
1819	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
1820	time_update (EV_P_ ev_tstamp max_block)	1951	time_update (EV_P_ ev_tstamp max_block)
1821	{	1952	{
1822	int i;
1823
1824	#if EV_USE_MONOTONIC	1953	#if EV_USE_MONOTONIC
1825	if (expect_true (have_monotonic))	1954	if (expect_true (have_monotonic))
1826	{	1955	{
		1956	int i;
1827	ev_tstamp odiff = rtmn_diff;	1957	ev_tstamp odiff = rtmn_diff;
1828		1958
1829	mn_now = get_clock ();	1959	mn_now = get_clock ();
1830		1960
1831	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1961	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1857	ev_rt_now = ev_time ();	1987	ev_rt_now = ev_time ();
1858	mn_now = get_clock ();	1988	mn_now = get_clock ();
1859	now_floor = mn_now;	1989	now_floor = mn_now;
1860	}	1990	}
1861		1991
		1992	/* no timer adjustment, as the monotonic clock doesn't jump */
		1993	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1862	# if EV_PERIODIC_ENABLE	1994	# if EV_PERIODIC_ENABLE
1863	periodics_reschedule (EV_A);	1995	periodics_reschedule (EV_A);
1864	# endif	1996	# endif
1865	/* no timer adjustment, as the monotonic clock doesn't jump */
1866	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1867	}	1997	}
1868	else	1998	else
1869	#endif	1999	#endif
1870	{	2000	{
1871	ev_rt_now = ev_time ();	2001	ev_rt_now = ev_time ();
1872		2002
1873	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2003	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1874	{	2004	{
		2005	/* adjust timers. this is easy, as the offset is the same for all of them */
		2006	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1875	#if EV_PERIODIC_ENABLE	2007	#if EV_PERIODIC_ENABLE
1876	periodics_reschedule (EV_A);	2008	periodics_reschedule (EV_A);
1877	#endif	2009	#endif
1878	/* adjust timers. this is easy, as the offset is the same for all of them */
1879	for (i = 0; i < timercnt; ++i)
1880	{
1881	ANHE *he = timers + i + HEAP0;
1882	ANHE_w (*he)->at += ev_rt_now - mn_now;
1883	ANHE_at_cache (*he);
1884	}
1885	}	2010	}
1886		2011
1887	mn_now = ev_rt_now;	2012	mn_now = ev_rt_now;
1888	}	2013	}
1889	}
1890
1891	void
1892	ev_ref (EV_P)
1893	{
1894	++activecnt;
1895	}
1896
1897	void
1898	ev_unref (EV_P)
1899	{
1900	--activecnt;
1901	}
1902
1903	void
1904	ev_now_update (EV_P)
1905	{
1906	time_update (EV_A_ 1e100);
1907	}	2014	}
1908		2015
1909	static int loop_done;	2016	static int loop_done;
1910		2017
1911	void	2018	void
…		…
1945	{	2052	{
1946	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2053	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1947	call_pending (EV_A);	2054	call_pending (EV_A);
1948	}	2055	}
1949		2056
1950	if (expect_false (!activecnt))
1951	break;
1952
1953	/* we might have forked, so reify kernel state if necessary */	2057	/* we might have forked, so reify kernel state if necessary */
1954	if (expect_false (postfork))	2058	if (expect_false (postfork))
1955	loop_fork (EV_A);	2059	loop_fork (EV_A);
1956		2060
1957	/* update fd-related kernel structures */	2061	/* update fd-related kernel structures */
…		…
2036	ev_unloop (EV_P_ int how)	2140	ev_unloop (EV_P_ int how)
2037	{	2141	{
2038	loop_done = how;	2142	loop_done = how;
2039	}	2143	}
2040		2144
		2145	void
		2146	ev_ref (EV_P)
		2147	{
		2148	++activecnt;
		2149	}
		2150
		2151	void
		2152	ev_unref (EV_P)
		2153	{
		2154	--activecnt;
		2155	}
		2156
		2157	void
		2158	ev_now_update (EV_P)
		2159	{
		2160	time_update (EV_A_ 1e100);
		2161	}
		2162
		2163	void
		2164	ev_suspend (EV_P)
		2165	{
		2166	ev_now_update (EV_A);
		2167	}
		2168
		2169	void
		2170	ev_resume (EV_P)
		2171	{
		2172	ev_tstamp mn_prev = mn_now;
		2173
		2174	ev_now_update (EV_A);
		2175	timers_reschedule (EV_A_ mn_now - mn_prev);
		2176	#if EV_PERIODIC_ENABLE
		2177	/* TODO: really do this? */
		2178	periodics_reschedule (EV_A);
		2179	#endif
		2180	}
		2181
2041	/*****************************************************************************/	2182	/*****************************************************************************/
		2183	/* singly-linked list management, used when the expected list length is short */
2042		2184
2043	void inline_size	2185	inline_size void
2044	wlist_add (WL *head, WL elem)	2186	wlist_add (WL *head, WL elem)
2045	{	2187	{
2046	elem->next = *head;	2188	elem->next = *head;
2047	*head = elem;	2189	*head = elem;
2048	}	2190	}
2049		2191
2050	void inline_size	2192	inline_size void
2051	wlist_del (WL *head, WL elem)	2193	wlist_del (WL *head, WL elem)
2052	{	2194	{
2053	while (*head)	2195	while (*head)
2054	{	2196	{
2055	if (*head == elem)	2197	if (*head == elem)
…		…
2060		2202
2061	head = &(*head)->next;	2203	head = &(*head)->next;
2062	}	2204	}
2063	}	2205	}
2064		2206
2065	void inline_speed	2207	/* internal, faster, version of ev_clear_pending */
		2208	inline_speed void
2066	clear_pending (EV_P_ W w)	2209	clear_pending (EV_P_ W w)
2067	{	2210	{
2068	if (w->pending)	2211	if (w->pending)
2069	{	2212	{
2070	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2213	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2071	w->pending = 0;	2214	w->pending = 0;
2072	}	2215	}
2073	}	2216	}
2074		2217
2075	int	2218	int
…		…
2079	int pending = w_->pending;	2222	int pending = w_->pending;
2080		2223
2081	if (expect_true (pending))	2224	if (expect_true (pending))
2082	{	2225	{
2083	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2226	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2227	p->w = (W)&pending_w;
2084	w_->pending = 0;	2228	w_->pending = 0;
2085	p->w = 0;
2086	return p->events;	2229	return p->events;
2087	}	2230	}
2088	else	2231	else
2089	return 0;	2232	return 0;
2090	}	2233	}
2091		2234
2092	void inline_size	2235	inline_size void
2093	pri_adjust (EV_P_ W w)	2236	pri_adjust (EV_P_ W w)
2094	{	2237	{
2095	int pri = w->priority;	2238	int pri = w->priority;
2096	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2239	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2097	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2240	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2098	w->priority = pri;	2241	w->priority = pri;
2099	}	2242	}
2100		2243
2101	void inline_speed	2244	inline_speed void
2102	ev_start (EV_P_ W w, int active)	2245	ev_start (EV_P_ W w, int active)
2103	{	2246	{
2104	pri_adjust (EV_A_ w);	2247	pri_adjust (EV_A_ w);
2105	w->active = active;	2248	w->active = active;
2106	ev_ref (EV_A);	2249	ev_ref (EV_A);
2107	}	2250	}
2108		2251
2109	void inline_size	2252	inline_size void
2110	ev_stop (EV_P_ W w)	2253	ev_stop (EV_P_ W w)
2111	{	2254	{
2112	ev_unref (EV_A);	2255	ev_unref (EV_A);
2113	w->active = 0;	2256	w->active = 0;
2114	}	2257	}
…		…
2121	int fd = w->fd;	2264	int fd = w->fd;
2122		2265
2123	if (expect_false (ev_is_active (w)))	2266	if (expect_false (ev_is_active (w)))
2124	return;	2267	return;
2125		2268
2126	assert (("ev_io_start called with negative fd", fd >= 0));	2269	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2127	assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));	2270	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2128		2271
2129	EV_FREQUENT_CHECK;	2272	EV_FREQUENT_CHECK;
2130		2273
2131	ev_start (EV_A_ (W)w, 1);	2274	ev_start (EV_A_ (W)w, 1);
2132	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2275	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2133	wlist_add (&anfds[fd].head, (WL)w);	2276	wlist_add (&anfds[fd].head, (WL)w);
2134		2277
2135	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2278	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2136	w->events &= ~EV_IOFDSET;	2279	w->events &= ~EV__IOFDSET;
2137		2280
2138	EV_FREQUENT_CHECK;	2281	EV_FREQUENT_CHECK;
2139	}	2282	}
2140		2283
2141	void noinline	2284	void noinline
…		…
2143	{	2286	{
2144	clear_pending (EV_A_ (W)w);	2287	clear_pending (EV_A_ (W)w);
2145	if (expect_false (!ev_is_active (w)))	2288	if (expect_false (!ev_is_active (w)))
2146	return;	2289	return;
2147		2290
2148	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2291	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2149		2292
2150	EV_FREQUENT_CHECK;	2293	EV_FREQUENT_CHECK;
2151		2294
2152	wlist_del (&anfds[w->fd].head, (WL)w);	2295	wlist_del (&anfds[w->fd].head, (WL)w);
2153	ev_stop (EV_A_ (W)w);	2296	ev_stop (EV_A_ (W)w);
…		…
2163	if (expect_false (ev_is_active (w)))	2306	if (expect_false (ev_is_active (w)))
2164	return;	2307	return;
2165		2308
2166	ev_at (w) += mn_now;	2309	ev_at (w) += mn_now;
2167		2310
2168	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2311	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2169		2312
2170	EV_FREQUENT_CHECK;	2313	EV_FREQUENT_CHECK;
2171		2314
2172	++timercnt;	2315	++timercnt;
2173	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2316	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2176	ANHE_at_cache (timers [ev_active (w)]);	2319	ANHE_at_cache (timers [ev_active (w)]);
2177	upheap (timers, ev_active (w));	2320	upheap (timers, ev_active (w));
2178		2321
2179	EV_FREQUENT_CHECK;	2322	EV_FREQUENT_CHECK;
2180		2323
2181	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2324	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2182	}	2325	}
2183		2326
2184	void noinline	2327	void noinline
2185	ev_timer_stop (EV_P_ ev_timer *w)	2328	ev_timer_stop (EV_P_ ev_timer *w)
2186	{	2329	{
…		…
2191	EV_FREQUENT_CHECK;	2334	EV_FREQUENT_CHECK;
2192		2335
2193	{	2336	{
2194	int active = ev_active (w);	2337	int active = ev_active (w);
2195		2338
2196	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2339	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2197		2340
2198	--timercnt;	2341	--timercnt;
2199		2342
2200	if (expect_true (active < timercnt + HEAP0))	2343	if (expect_true (active < timercnt + HEAP0))
2201	{	2344	{
…		…
2245		2388
2246	if (w->reschedule_cb)	2389	if (w->reschedule_cb)
2247	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2390	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2248	else if (w->interval)	2391	else if (w->interval)
2249	{	2392	{
2250	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2393	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2251	/* this formula differs from the one in periodic_reify because we do not always round up */	2394	/* this formula differs from the one in periodic_reify because we do not always round up */
2252	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2395	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2253	}	2396	}
2254	else	2397	else
2255	ev_at (w) = w->offset;	2398	ev_at (w) = w->offset;
…		…
2263	ANHE_at_cache (periodics [ev_active (w)]);	2406	ANHE_at_cache (periodics [ev_active (w)]);
2264	upheap (periodics, ev_active (w));	2407	upheap (periodics, ev_active (w));
2265		2408
2266	EV_FREQUENT_CHECK;	2409	EV_FREQUENT_CHECK;
2267		2410
2268	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2411	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2269	}	2412	}
2270		2413
2271	void noinline	2414	void noinline
2272	ev_periodic_stop (EV_P_ ev_periodic *w)	2415	ev_periodic_stop (EV_P_ ev_periodic *w)
2273	{	2416	{
…		…
2278	EV_FREQUENT_CHECK;	2421	EV_FREQUENT_CHECK;
2279		2422
2280	{	2423	{
2281	int active = ev_active (w);	2424	int active = ev_active (w);
2282		2425
2283	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2426	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2284		2427
2285	--periodiccnt;	2428	--periodiccnt;
2286		2429
2287	if (expect_true (active < periodiccnt + HEAP0))	2430	if (expect_true (active < periodiccnt + HEAP0))
2288	{	2431	{
…		…
2311		2454
2312	void noinline	2455	void noinline
2313	ev_signal_start (EV_P_ ev_signal *w)	2456	ev_signal_start (EV_P_ ev_signal *w)
2314	{	2457	{
2315	#if EV_MULTIPLICITY	2458	#if EV_MULTIPLICITY
2316	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2459	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2317	#endif	2460	#endif
2318	if (expect_false (ev_is_active (w)))	2461	if (expect_false (ev_is_active (w)))
2319	return;	2462	return;
2320		2463
2321	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2464	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2322		2465
2323	evpipe_init (EV_A);	2466	evpipe_init (EV_A);
2324		2467
2325	EV_FREQUENT_CHECK;	2468	EV_FREQUENT_CHECK;
2326		2469
…		…
2377		2520
2378	void	2521	void
2379	ev_child_start (EV_P_ ev_child *w)	2522	ev_child_start (EV_P_ ev_child *w)
2380	{	2523	{
2381	#if EV_MULTIPLICITY	2524	#if EV_MULTIPLICITY
2382	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2525	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2383	#endif	2526	#endif
2384	if (expect_false (ev_is_active (w)))	2527	if (expect_false (ev_is_active (w)))
2385	return;	2528	return;
2386		2529
2387	EV_FREQUENT_CHECK;	2530	EV_FREQUENT_CHECK;
…		…
2412	# ifdef _WIN32	2555	# ifdef _WIN32
2413	# undef lstat	2556	# undef lstat
2414	# define lstat(a,b) _stati64 (a,b)	2557	# define lstat(a,b) _stati64 (a,b)
2415	# endif	2558	# endif
2416		2559
2417	#define DEF_STAT_INTERVAL 5.0074891	2560	#define DEF_STAT_INTERVAL 5.0074891
		2561	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2418	#define MIN_STAT_INTERVAL 0.1074891	2562	#define MIN_STAT_INTERVAL 0.1074891
2419		2563
2420	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2564	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2421		2565
2422	#if EV_USE_INOTIFY	2566	#if EV_USE_INOTIFY
2423	# define EV_INOTIFY_BUFSIZE 8192	2567	# define EV_INOTIFY_BUFSIZE 8192
…		…
2427	{	2571	{
2428	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);	2572	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);
2429		2573
2430	if (w->wd < 0)	2574	if (w->wd < 0)
2431	{	2575	{
		2576	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2432	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2577	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2433		2578
2434	/* monitor some parent directory for speedup hints */	2579	/* monitor some parent directory for speedup hints */
2435	/* note that exceeding the hardcoded limit is not a correctness issue, */	2580	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2436	/* but an efficiency issue only */	2581	/* but an efficiency issue only */
2437	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2582	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2438	{	2583	{
2439	char path [4096];	2584	char path [4096];
2440	strcpy (path, w->path);	2585	strcpy (path, w->path);
…		…
2444	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2589	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2445	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2590	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2446		2591
2447	char *pend = strrchr (path, '/');	2592	char *pend = strrchr (path, '/');
2448		2593
2449	if (!pend)	2594	if (!pend || pend == path)
2450	break; /* whoops, no '/', complain to your admin */	2595	break;
2451		2596
2452	*pend = 0;	2597	*pend = 0;
2453	w->wd = inotify_add_watch (fs_fd, path, mask);	2598	w->wd = inotify_add_watch (fs_fd, path, mask);
2454	}	2599	}
2455	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2600	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2456	}	2601	}
2457	}	2602	}
2458	else
2459	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2460		2603
2461	if (w->wd >= 0)	2604	if (w->wd >= 0)
		2605	{
2462	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2606	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2607
		2608	/* now local changes will be tracked by inotify, but remote changes won't */
		2609	/* unless the filesystem it known to be local, we therefore still poll */
		2610	/* also do poll on <2.6.25, but with normal frequency */
		2611	struct statfs sfs;
		2612
		2613	if (fs_2625 && !statfs (w->path, &sfs))
		2614	if (sfs.f_type == 0x1373 /* devfs */
		2615	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2616	|| sfs.f_type == 0x3153464a /* jfs */
		2617	|| sfs.f_type == 0x52654973 /* reiser3 */
		2618	|| sfs.f_type == 0x01021994 /* tempfs */
		2619	|| sfs.f_type == 0x58465342 /* xfs */)
		2620	return;
		2621
		2622	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2623	ev_timer_again (EV_A_ &w->timer);
		2624	}
2463	}	2625	}
2464		2626
2465	static void noinline	2627	static void noinline
2466	infy_del (EV_P_ ev_stat *w)	2628	infy_del (EV_P_ ev_stat *w)
2467	{	2629	{
…		…
2497		2659
2498	if (w->wd == wd || wd == -1)	2660	if (w->wd == wd || wd == -1)
2499	{	2661	{
2500	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2662	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2501	{	2663	{
		2664	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2502	w->wd = -1;	2665	w->wd = -1;
2503	infy_add (EV_A_ w); /* re-add, no matter what */	2666	infy_add (EV_A_ w); /* re-add, no matter what */
2504	}	2667	}
2505		2668
2506	stat_timer_cb (EV_A_ &w->timer, 0);	2669	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2519		2682
2520	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2683	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2521	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2684	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2522	}	2685	}
2523		2686
2524	void inline_size	2687	inline_size void
2525	infy_init (EV_P)	2688	check_2625 (EV_P)
2526	{	2689	{
2527	if (fs_fd != -2)
2528	return;
2529
2530	/* kernels < 2.6.25 are borked	2690	/* kernels < 2.6.25 are borked
2531	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2691	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2532	*/	2692	*/
2533	{
2534	struct utsname buf;	2693	struct utsname buf;
2535	int major, minor, micro;	2694	int major, minor, micro;
2536		2695
2537	fs_fd = -1;
2538
2539	if (uname (&buf))	2696	if (uname (&buf))
2540	return;	2697	return;
2541		2698
2542	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2699	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2543	return;	2700	return;
2544		2701
2545	if (major < 2	2702	if (major < 2
2546	|| (major == 2 && minor < 6)	2703	|| (major == 2 && minor < 6)
2547	|| (major == 2 && minor == 6 && micro < 25))	2704	|| (major == 2 && minor == 6 && micro < 25))
2548	return;	2705	return;
2549	}	2706
		2707	fs_2625 = 1;
		2708	}
		2709
		2710	inline_size void
		2711	infy_init (EV_P)
		2712	{
		2713	if (fs_fd != -2)
		2714	return;
		2715
		2716	fs_fd = -1;
		2717
		2718	check_2625 (EV_A);
2550		2719
2551	fs_fd = inotify_init ();	2720	fs_fd = inotify_init ();
2552		2721
2553	if (fs_fd >= 0)	2722	if (fs_fd >= 0)
2554	{	2723	{
…		…
2556	ev_set_priority (&fs_w, EV_MAXPRI);	2725	ev_set_priority (&fs_w, EV_MAXPRI);
2557	ev_io_start (EV_A_ &fs_w);	2726	ev_io_start (EV_A_ &fs_w);
2558	}	2727	}
2559	}	2728	}
2560		2729
2561	void inline_size	2730	inline_size void
2562	infy_fork (EV_P)	2731	infy_fork (EV_P)
2563	{	2732	{
2564	int slot;	2733	int slot;
2565		2734
2566	if (fs_fd < 0)	2735	if (fs_fd < 0)
…		…
2582	w->wd = -1;	2751	w->wd = -1;
2583		2752
2584	if (fs_fd >= 0)	2753	if (fs_fd >= 0)
2585	infy_add (EV_A_ w); /* re-add, no matter what */	2754	infy_add (EV_A_ w); /* re-add, no matter what */
2586	else	2755	else
2587	ev_timer_start (EV_A_ &w->timer);	2756	ev_timer_again (EV_A_ &w->timer);
2588	}	2757	}
2589	}	2758	}
2590	}	2759	}
2591		2760
2592	#endif	2761	#endif
…		…
2647	ev_stat_start (EV_P_ ev_stat *w)	2816	ev_stat_start (EV_P_ ev_stat *w)
2648	{	2817	{
2649	if (expect_false (ev_is_active (w)))	2818	if (expect_false (ev_is_active (w)))
2650	return;	2819	return;
2651		2820
2652	/* since we use memcmp, we need to clear any padding data etc. */
2653	memset (&w->prev, 0, sizeof (ev_statdata));
2654	memset (&w->attr, 0, sizeof (ev_statdata));
2655
2656	ev_stat_stat (EV_A_ w);	2821	ev_stat_stat (EV_A_ w);
2657		2822
		2823	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2658	if (w->interval < MIN_STAT_INTERVAL)	2824	w->interval = MIN_STAT_INTERVAL;
2659	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2660		2825
2661	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2826	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2662	ev_set_priority (&w->timer, ev_priority (w));	2827	ev_set_priority (&w->timer, ev_priority (w));
2663		2828
2664	#if EV_USE_INOTIFY	2829	#if EV_USE_INOTIFY
2665	infy_init (EV_A);	2830	infy_init (EV_A);
2666		2831
2667	if (fs_fd >= 0)	2832	if (fs_fd >= 0)
2668	infy_add (EV_A_ w);	2833	infy_add (EV_A_ w);
2669	else	2834	else
2670	#endif	2835	#endif
2671	ev_timer_start (EV_A_ &w->timer);	2836	ev_timer_again (EV_A_ &w->timer);
2672		2837
2673	ev_start (EV_A_ (W)w, 1);	2838	ev_start (EV_A_ (W)w, 1);
2674		2839
2675	EV_FREQUENT_CHECK;	2840	EV_FREQUENT_CHECK;
2676	}	2841	}
…		…
2851	static void	3016	static void
2852	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3017	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2853	{	3018	{
2854	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3019	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2855		3020
		3021	ev_embed_stop (EV_A_ w);
		3022
2856	{	3023	{
2857	struct ev_loop *loop = w->other;	3024	struct ev_loop *loop = w->other;
2858		3025
2859	ev_loop_fork (EV_A);	3026	ev_loop_fork (EV_A);
		3027	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2860	}	3028	}
		3029
		3030	ev_embed_start (EV_A_ w);
2861	}	3031	}
2862		3032
2863	#if 0	3033	#if 0
2864	static void	3034	static void
2865	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3035	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2874	if (expect_false (ev_is_active (w)))	3044	if (expect_false (ev_is_active (w)))
2875	return;	3045	return;
2876		3046
2877	{	3047	{
2878	struct ev_loop *loop = w->other;	3048	struct ev_loop *loop = w->other;
2879	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3049	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2880	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3050	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2881	}	3051	}
2882		3052
2883	EV_FREQUENT_CHECK;	3053	EV_FREQUENT_CHECK;
2884		3054
…		…
3067	ev_timer_set (&once->to, timeout, 0.);	3237	ev_timer_set (&once->to, timeout, 0.);
3068	ev_timer_start (EV_A_ &once->to);	3238	ev_timer_start (EV_A_ &once->to);
3069	}	3239	}
3070	}	3240	}
3071		3241
		3242	/*****************************************************************************/
		3243
		3244	#if EV_WALK_ENABLE
		3245	void
		3246	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3247	{
		3248	int i, j;
		3249	ev_watcher_list *wl, *wn;
		3250
		3251	if (types & (EV_IO | EV_EMBED))
		3252	for (i = 0; i < anfdmax; ++i)
		3253	for (wl = anfds [i].head; wl; )
		3254	{
		3255	wn = wl->next;
		3256
		3257	#if EV_EMBED_ENABLE
		3258	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3259	{
		3260	if (types & EV_EMBED)
		3261	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3262	}
		3263	else
		3264	#endif
		3265	#if EV_USE_INOTIFY
		3266	if (ev_cb ((ev_io *)wl) == infy_cb)
		3267	;
		3268	else
		3269	#endif
		3270	if ((ev_io *)wl != &pipe_w)
		3271	if (types & EV_IO)
		3272	cb (EV_A_ EV_IO, wl);
		3273
		3274	wl = wn;
		3275	}
		3276
		3277	if (types & (EV_TIMER | EV_STAT))
		3278	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3279	#if EV_STAT_ENABLE
		3280	/*TODO: timer is not always active*/
		3281	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3282	{
		3283	if (types & EV_STAT)
		3284	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3285	}
		3286	else
		3287	#endif
		3288	if (types & EV_TIMER)
		3289	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3290
		3291	#if EV_PERIODIC_ENABLE
		3292	if (types & EV_PERIODIC)
		3293	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3294	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3295	#endif
		3296
		3297	#if EV_IDLE_ENABLE
		3298	if (types & EV_IDLE)
		3299	for (j = NUMPRI; i--; )
		3300	for (i = idlecnt [j]; i--; )
		3301	cb (EV_A_ EV_IDLE, idles [j][i]);
		3302	#endif
		3303
		3304	#if EV_FORK_ENABLE
		3305	if (types & EV_FORK)
		3306	for (i = forkcnt; i--; )
		3307	if (ev_cb (forks [i]) != embed_fork_cb)
		3308	cb (EV_A_ EV_FORK, forks [i]);
		3309	#endif
		3310
		3311	#if EV_ASYNC_ENABLE
		3312	if (types & EV_ASYNC)
		3313	for (i = asynccnt; i--; )
		3314	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3315	#endif
		3316
		3317	if (types & EV_PREPARE)
		3318	for (i = preparecnt; i--; )
		3319	#if EV_EMBED_ENABLE
		3320	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3321	#endif
		3322	cb (EV_A_ EV_PREPARE, prepares [i]);
		3323
		3324	if (types & EV_CHECK)
		3325	for (i = checkcnt; i--; )
		3326	cb (EV_A_ EV_CHECK, checks [i]);
		3327
		3328	if (types & EV_SIGNAL)
		3329	for (i = 0; i < signalmax; ++i)
		3330	for (wl = signals [i].head; wl; )
		3331	{
		3332	wn = wl->next;
		3333	cb (EV_A_ EV_SIGNAL, wl);
		3334	wl = wn;
		3335	}
		3336
		3337	if (types & EV_CHILD)
		3338	for (i = EV_PID_HASHSIZE; i--; )
		3339	for (wl = childs [i]; wl; )
		3340	{
		3341	wn = wl->next;
		3342	cb (EV_A_ EV_CHILD, wl);
		3343	wl = wn;
		3344	}
		3345	/* EV_STAT 0x00001000 /* stat data changed */
		3346	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3347	}
		3348	#endif
		3349
3072	#if EV_MULTIPLICITY	3350	#if EV_MULTIPLICITY
3073	#include "ev_wrap.h"	3351	#include "ev_wrap.h"
3074	#endif	3352	#endif
3075		3353
3076	#ifdef __cplusplus	3354	#ifdef __cplusplus

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