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Comparing libev/ev.c (file contents):
Revision 1.259 by root, Mon Sep 8 13:14:23 2008 UTC vs.
Revision 1.289 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
…		…
286	# include <sys/select.h>	306	# include <sys/select.h>
287	# endif	307	# endif
288	#endif	308	#endif
289		309
290	#if EV_USE_INOTIFY	310	#if EV_USE_INOTIFY
		311	# include <sys/utsname.h>
		312	# include <sys/statfs.h>
291	# include <sys/inotify.h>	313	# include <sys/inotify.h>
		314	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		315	# ifndef IN_DONT_FOLLOW
		316	# undef EV_USE_INOTIFY
		317	# define EV_USE_INOTIFY 0
		318	# endif
292	#endif	319	#endif
293		320
294	#if EV_SELECT_IS_WINSOCKET	321	#if EV_SELECT_IS_WINSOCKET
295	# 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
296	#endif	332	#endif
297		333
298	#if EV_USE_EVENTFD	334	#if EV_USE_EVENTFD
299	/* 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 */
300	# include <stdint.h>	336	# include <stdint.h>
…		…
361	typedef ev_watcher_time *WT;	397	typedef ev_watcher_time *WT;
362		398
363	#define ev_active(w) ((W)(w))->active	399	#define ev_active(w) ((W)(w))->active
364	#define ev_at(w) ((WT)(w))->at	400	#define ev_at(w) ((WT)(w))->at
365		401
366	#if EV_USE_MONOTONIC	402	#if EV_USE_REALTIME
367	/* 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 */
368	/* 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
369	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? */
370	#endif	410	#endif
371		411
372	#ifdef _WIN32	412	#ifdef _WIN32
373	# include "ev_win32.c"	413	# include "ev_win32.c"
…		…
382	{	422	{
383	syserr_cb = cb;	423	syserr_cb = cb;
384	}	424	}
385		425
386	static void noinline	426	static void noinline
387	syserr (const char *msg)	427	ev_syserr (const char *msg)
388	{	428	{
389	if (!msg)	429	if (!msg)
390	msg = "(libev) system error";	430	msg = "(libev) system error";
391		431
392	if (syserr_cb)	432	if (syserr_cb)
…		…
438	#define ev_malloc(size) ev_realloc (0, (size))	478	#define ev_malloc(size) ev_realloc (0, (size))
439	#define ev_free(ptr) ev_realloc ((ptr), 0)	479	#define ev_free(ptr) ev_realloc ((ptr), 0)
440		480
441	/*****************************************************************************/	481	/*****************************************************************************/
442		482
		483	/* file descriptor info structure */
443	typedef struct	484	typedef struct
444	{	485	{
445	WL head;	486	WL head;
446	unsigned char events;	487	unsigned char events; /* the events watched for */
		488	unsigned char reify; /* flag set when this ANFD needs reification */
		489	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
447	unsigned char reify;	490	unsigned char unused;
		491	#if EV_USE_EPOLL
		492	unsigned int egen; /* generation counter to counter epoll bugs */
		493	#endif
448	#if EV_SELECT_IS_WINSOCKET	494	#if EV_SELECT_IS_WINSOCKET
449	SOCKET handle;	495	SOCKET handle;
450	#endif	496	#endif
451	} ANFD;	497	} ANFD;
452		498
		499	/* stores the pending event set for a given watcher */
453	typedef struct	500	typedef struct
454	{	501	{
455	W w;	502	W w;
456	int events;	503	int events; /* the pending event set for the given watcher */
457	} ANPENDING;	504	} ANPENDING;
458		505
459	#if EV_USE_INOTIFY	506	#if EV_USE_INOTIFY
460	/* hash table entry per inotify-id */	507	/* hash table entry per inotify-id */
461	typedef struct	508	typedef struct
…		…
464	} ANFS;	511	} ANFS;
465	#endif	512	#endif
466		513
467	/* Heap Entry */	514	/* Heap Entry */
468	#if EV_HEAP_CACHE_AT	515	#if EV_HEAP_CACHE_AT
		516	/* a heap element */
469	typedef struct {	517	typedef struct {
470	ev_tstamp at;	518	ev_tstamp at;
471	WT w;	519	WT w;
472	} ANHE;	520	} ANHE;
473		521
474	#define ANHE_w(he) (he).w /* access watcher, read-write */	522	#define ANHE_w(he) (he).w /* access watcher, read-write */
475	#define ANHE_at(he) (he).at /* access cached at, read-only */	523	#define ANHE_at(he) (he).at /* access cached at, read-only */
476	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */	524	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
477	#else	525	#else
		526	/* a heap element */
478	typedef WT ANHE;	527	typedef WT ANHE;
479		528
480	#define ANHE_w(he) (he)	529	#define ANHE_w(he) (he)
481	#define ANHE_at(he) (he)->at	530	#define ANHE_at(he) (he)->at
482	#define ANHE_at_cache(he)	531	#define ANHE_at_cache(he)
…		…
512		561
513	ev_tstamp	562	ev_tstamp
514	ev_time (void)	563	ev_time (void)
515	{	564	{
516	#if EV_USE_REALTIME	565	#if EV_USE_REALTIME
		566	if (expect_true (have_realtime))
		567	{
517	struct timespec ts;	568	struct timespec ts;
518	clock_gettime (CLOCK_REALTIME, &ts);	569	clock_gettime (CLOCK_REALTIME, &ts);
519	return ts.tv_sec + ts.tv_nsec * 1e-9;	570	return ts.tv_sec + ts.tv_nsec * 1e-9;
520	#else	571	}
		572	#endif
		573
521	struct timeval tv;	574	struct timeval tv;
522	gettimeofday (&tv, 0);	575	gettimeofday (&tv, 0);
523	return tv.tv_sec + tv.tv_usec * 1e-6;	576	return tv.tv_sec + tv.tv_usec * 1e-6;
524	#endif
525	}	577	}
526		578
527	ev_tstamp inline_size	579	inline_size ev_tstamp
528	get_clock (void)	580	get_clock (void)
529	{	581	{
530	#if EV_USE_MONOTONIC	582	#if EV_USE_MONOTONIC
531	if (expect_true (have_monotonic))	583	if (expect_true (have_monotonic))
532	{	584	{
…		…
577		629
578	/*****************************************************************************/	630	/*****************************************************************************/
579		631
580	#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 */
581		633
582	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
583	array_nextsize (int elem, int cur, int cnt)	637	array_nextsize (int elem, int cur, int cnt)
584	{	638	{
585	int ncur = cur + 1;	639	int ncur = cur + 1;
586		640
587	do	641	do
…		…
604	array_realloc (int elem, void *base, int *cur, int cnt)	658	array_realloc (int elem, void *base, int *cur, int cnt)
605	{	659	{
606	*cur = array_nextsize (elem, *cur, cnt);	660	*cur = array_nextsize (elem, *cur, cnt);
607	return ev_realloc (base, elem * *cur);	661	return ev_realloc (base, elem * *cur);
608	}	662	}
		663
		664	#define array_init_zero(base,count) \
		665	memset ((void *)(base), 0, sizeof (*(base)) * (count))
609		666
610	#define array_needsize(type,base,cur,cnt,init) \	667	#define array_needsize(type,base,cur,cnt,init) \
611	if (expect_false ((cnt) > (cur))) \	668	if (expect_false ((cnt) > (cur))) \
612	{ \	669	{ \
613	int ocur_ = (cur); \	670	int ocur_ = (cur); \
…		…
625	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	682	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
626	}	683	}
627	#endif	684	#endif
628		685
629	#define array_free(stem, idx) \	686	#define array_free(stem, idx) \
630	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
631		688
632	/*****************************************************************************/	689	/*****************************************************************************/
		690
		691	/* dummy callback for pending events */
		692	static void noinline
		693	pendingcb (EV_P_ ev_prepare *w, int revents)
		694	{
		695	}
633		696
634	void noinline	697	void noinline
635	ev_feed_event (EV_P_ void *w, int revents)	698	ev_feed_event (EV_P_ void *w, int revents)
636	{	699	{
637	W w_ = (W)w;	700	W w_ = (W)w;
…		…
646	pendings [pri][w_->pending - 1].w = w_;	709	pendings [pri][w_->pending - 1].w = w_;
647	pendings [pri][w_->pending - 1].events = revents;	710	pendings [pri][w_->pending - 1].events = revents;
648	}	711	}
649	}	712	}
650		713
651	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
652	queue_events (EV_P_ W *events, int eventcnt, int type)	730	queue_events (EV_P_ W *events, int eventcnt, int type)
653	{	731	{
654	int i;	732	int i;
655		733
656	for (i = 0; i < eventcnt; ++i)	734	for (i = 0; i < eventcnt; ++i)
657	ev_feed_event (EV_A_ events [i], type);	735	ev_feed_event (EV_A_ events [i], type);
658	}	736	}
659		737
660	/*****************************************************************************/	738	/*****************************************************************************/
661		739
662	void inline_size	740	inline_speed void
663	anfds_init (ANFD *base, int count)
664	{
665	while (count--)
666	{
667	base->head = 0;
668	base->events = EV_NONE;
669	base->reify = 0;
670
671	++base;
672	}
673	}
674
675	void inline_speed
676	fd_event (EV_P_ int fd, int revents)	741	fd_event (EV_P_ int fd, int revents)
677	{	742	{
678	ANFD *anfd = anfds + fd;	743	ANFD *anfd = anfds + fd;
679	ev_io *w;	744	ev_io *w;
680		745
…		…
692	{	757	{
693	if (fd >= 0 && fd < anfdmax)	758	if (fd >= 0 && fd < anfdmax)
694	fd_event (EV_A_ fd, revents);	759	fd_event (EV_A_ fd, revents);
695	}	760	}
696		761
697	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
698	fd_reify (EV_P)	765	fd_reify (EV_P)
699	{	766	{
700	int i;	767	int i;
701		768
702	for (i = 0; i < fdchangecnt; ++i)	769	for (i = 0; i < fdchangecnt; ++i)
…		…
717	#ifdef EV_FD_TO_WIN32_HANDLE	784	#ifdef EV_FD_TO_WIN32_HANDLE
718	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	785	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
719	#else	786	#else
720	anfd->handle = _get_osfhandle (fd);	787	anfd->handle = _get_osfhandle (fd);
721	#endif	788	#endif
722	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));
723	}	790	}
724	#endif	791	#endif
725		792
726	{	793	{
727	unsigned char o_events = anfd->events;	794	unsigned char o_events = anfd->events;
728	unsigned char o_reify = anfd->reify;	795	unsigned char o_reify = anfd->reify;
729		796
730	anfd->reify = 0;	797	anfd->reify = 0;
731	anfd->events = events;	798	anfd->events = events;
732		799
733	if (o_events != events || o_reify & EV_IOFDSET)	800	if (o_events != events || o_reify & EV__IOFDSET)
734	backend_modify (EV_A_ fd, o_events, events);	801	backend_modify (EV_A_ fd, o_events, events);
735	}	802	}
736	}	803	}
737		804
738	fdchangecnt = 0;	805	fdchangecnt = 0;
739	}	806	}
740		807
741	void inline_size	808	/* something about the given fd changed */
		809	inline_size void
742	fd_change (EV_P_ int fd, int flags)	810	fd_change (EV_P_ int fd, int flags)
743	{	811	{
744	unsigned char reify = anfds [fd].reify;	812	unsigned char reify = anfds [fd].reify;
745	anfds [fd].reify |= flags;	813	anfds [fd].reify |= flags;
746		814
…		…
750	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	818	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
751	fdchanges [fdchangecnt - 1] = fd;	819	fdchanges [fdchangecnt - 1] = fd;
752	}	820	}
753	}	821	}
754		822
755	void inline_speed	823	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		824	inline_speed void
756	fd_kill (EV_P_ int fd)	825	fd_kill (EV_P_ int fd)
757	{	826	{
758	ev_io *w;	827	ev_io *w;
759		828
760	while ((w = (ev_io *)anfds [fd].head))	829	while ((w = (ev_io *)anfds [fd].head))
…		…
762	ev_io_stop (EV_A_ w);	831	ev_io_stop (EV_A_ w);
763	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);
764	}	833	}
765	}	834	}
766		835
767	int inline_size	836	/* check whether the given fd is atcually valid, for error recovery */
		837	inline_size int
768	fd_valid (int fd)	838	fd_valid (int fd)
769	{	839	{
770	#ifdef _WIN32	840	#ifdef _WIN32
771	return _get_osfhandle (fd) != -1;	841	return _get_osfhandle (fd) != -1;
772	#else	842	#else
…		…
808		878
809	for (fd = 0; fd < anfdmax; ++fd)	879	for (fd = 0; fd < anfdmax; ++fd)
810	if (anfds [fd].events)	880	if (anfds [fd].events)
811	{	881	{
812	anfds [fd].events = 0;	882	anfds [fd].events = 0;
		883	anfds [fd].emask = 0;
813	fd_change (EV_A_ fd, EV_IOFDSET | 1);	884	fd_change (EV_A_ fd, EV__IOFDSET | 1);
814	}	885	}
815	}	886	}
816		887
817	/*****************************************************************************/	888	/*****************************************************************************/
818		889
…		…
834	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	905	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
835	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	906	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
836	#define UPHEAP_DONE(p,k) ((p) == (k))	907	#define UPHEAP_DONE(p,k) ((p) == (k))
837		908
838	/* away from the root */	909	/* away from the root */
839	void inline_speed	910	inline_speed void
840	downheap (ANHE *heap, int N, int k)	911	downheap (ANHE *heap, int N, int k)
841	{	912	{
842	ANHE he = heap [k];	913	ANHE he = heap [k];
843	ANHE *E = heap + N + HEAP0;	914	ANHE *E = heap + N + HEAP0;
844		915
…		…
884	#define HEAP0 1	955	#define HEAP0 1
885	#define HPARENT(k) ((k) >> 1)	956	#define HPARENT(k) ((k) >> 1)
886	#define UPHEAP_DONE(p,k) (!(p))	957	#define UPHEAP_DONE(p,k) (!(p))
887		958
888	/* away from the root */	959	/* away from the root */
889	void inline_speed	960	inline_speed void
890	downheap (ANHE *heap, int N, int k)	961	downheap (ANHE *heap, int N, int k)
891	{	962	{
892	ANHE he = heap [k];	963	ANHE he = heap [k];
893		964
894	for (;;)	965	for (;;)
…		…
914	ev_active (ANHE_w (he)) = k;	985	ev_active (ANHE_w (he)) = k;
915	}	986	}
916	#endif	987	#endif
917		988
918	/* towards the root */	989	/* towards the root */
919	void inline_speed	990	inline_speed void
920	upheap (ANHE *heap, int k)	991	upheap (ANHE *heap, int k)
921	{	992	{
922	ANHE he = heap [k];	993	ANHE he = heap [k];
923		994
924	for (;;)	995	for (;;)
…		…
935		1006
936	heap [k] = he;	1007	heap [k] = he;
937	ev_active (ANHE_w (he)) = k;	1008	ev_active (ANHE_w (he)) = k;
938	}	1009	}
939		1010
940	void inline_size	1011	/* move an element suitably so it is in a correct place */
		1012	inline_size void
941	adjustheap (ANHE *heap, int N, int k)	1013	adjustheap (ANHE *heap, int N, int k)
942	{	1014	{
943	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]))
944	upheap (heap, k);	1016	upheap (heap, k);
945	else	1017	else
946	downheap (heap, N, k);	1018	downheap (heap, N, k);
947	}	1019	}
948		1020
949	/* 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 */
950	void inline_size	1022	inline_size void
951	reheap (ANHE *heap, int N)	1023	reheap (ANHE *heap, int N)
952	{	1024	{
953	int i;	1025	int i;
954		1026
955	/* 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 */
…		…
958	upheap (heap, i + HEAP0);	1030	upheap (heap, i + HEAP0);
959	}	1031	}
960		1032
961	/*****************************************************************************/	1033	/*****************************************************************************/
962		1034
		1035	/* associate signal watchers to a signal signal */
963	typedef struct	1036	typedef struct
964	{	1037	{
965	WL head;	1038	WL head;
966	EV_ATOMIC_T gotsig;	1039	EV_ATOMIC_T gotsig;
967	} ANSIG;	1040	} ANSIG;
…		…
969	static ANSIG *signals;	1042	static ANSIG *signals;
970	static int signalmax;	1043	static int signalmax;
971		1044
972	static EV_ATOMIC_T gotsig;	1045	static EV_ATOMIC_T gotsig;
973		1046
974	void inline_size
975	signals_init (ANSIG *base, int count)
976	{
977	while (count--)
978	{
979	base->head = 0;
980	base->gotsig = 0;
981
982	++base;
983	}
984	}
985
986	/*****************************************************************************/	1047	/*****************************************************************************/
987		1048
988	void inline_speed	1049	/* used to prepare libev internal fd's */
		1050	/* this is not fork-safe */
		1051	inline_speed void
989	fd_intern (int fd)	1052	fd_intern (int fd)
990	{	1053	{
991	#ifdef _WIN32	1054	#ifdef _WIN32
992	unsigned long arg = 1;	1055	unsigned long arg = 1;
993	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1056	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
998	}	1061	}
999		1062
1000	static void noinline	1063	static void noinline
1001	evpipe_init (EV_P)	1064	evpipe_init (EV_P)
1002	{	1065	{
1003	if (!ev_is_active (&pipeev))	1066	if (!ev_is_active (&pipe_w))
1004	{	1067	{
1005	#if EV_USE_EVENTFD	1068	#if EV_USE_EVENTFD
1006	if ((evfd = eventfd (0, 0)) >= 0)	1069	if ((evfd = eventfd (0, 0)) >= 0)
1007	{	1070	{
1008	evpipe [0] = -1;	1071	evpipe [0] = -1;
1009	fd_intern (evfd);	1072	fd_intern (evfd);
1010	ev_io_set (&pipeev, evfd, EV_READ);	1073	ev_io_set (&pipe_w, evfd, EV_READ);
1011	}	1074	}
1012	else	1075	else
1013	#endif	1076	#endif
1014	{	1077	{
1015	while (pipe (evpipe))	1078	while (pipe (evpipe))
1016	syserr ("(libev) error creating signal/async pipe");	1079	ev_syserr ("(libev) error creating signal/async pipe");
1017		1080
1018	fd_intern (evpipe [0]);	1081	fd_intern (evpipe [0]);
1019	fd_intern (evpipe [1]);	1082	fd_intern (evpipe [1]);
1020	ev_io_set (&pipeev, evpipe [0], EV_READ);	1083	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1021	}	1084	}
1022		1085
1023	ev_io_start (EV_A_ &pipeev);	1086	ev_io_start (EV_A_ &pipe_w);
1024	ev_unref (EV_A); /* watcher should not keep loop alive */	1087	ev_unref (EV_A); /* watcher should not keep loop alive */
1025	}	1088	}
1026	}	1089	}
1027		1090
1028	void inline_size	1091	inline_size void
1029	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1092	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1030	{	1093	{
1031	if (!*flag)	1094	if (!*flag)
1032	{	1095	{
1033	int old_errno = errno; /* save errno because write might clobber it */	1096	int old_errno = errno; /* save errno because write might clobber it */
…		…
1046		1109
1047	errno = old_errno;	1110	errno = old_errno;
1048	}	1111	}
1049	}	1112	}
1050		1113
		1114	/* called whenever the libev signal pipe */
		1115	/* got some events (signal, async) */
1051	static void	1116	static void
1052	pipecb (EV_P_ ev_io *iow, int revents)	1117	pipecb (EV_P_ ev_io *iow, int revents)
1053	{	1118	{
1054	#if EV_USE_EVENTFD	1119	#if EV_USE_EVENTFD
1055	if (evfd >= 0)	1120	if (evfd >= 0)
…		…
1111	ev_feed_signal_event (EV_P_ int signum)	1176	ev_feed_signal_event (EV_P_ int signum)
1112	{	1177	{
1113	WL w;	1178	WL w;
1114		1179
1115	#if EV_MULTIPLICITY	1180	#if EV_MULTIPLICITY
1116	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));
1117	#endif	1182	#endif
1118		1183
1119	--signum;	1184	--signum;
1120		1185
1121	if (signum < 0 || signum >= signalmax)	1186	if (signum < 0 || signum >= signalmax)
…		…
1137		1202
1138	#ifndef WIFCONTINUED	1203	#ifndef WIFCONTINUED
1139	# define WIFCONTINUED(status) 0	1204	# define WIFCONTINUED(status) 0
1140	#endif	1205	#endif
1141		1206
1142	void inline_speed	1207	/* handle a single child status event */
		1208	inline_speed void
1143	child_reap (EV_P_ int chain, int pid, int status)	1209	child_reap (EV_P_ int chain, int pid, int status)
1144	{	1210	{
1145	ev_child *w;	1211	ev_child *w;
1146	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1212	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1147		1213
…		…
1160		1226
1161	#ifndef WCONTINUED	1227	#ifndef WCONTINUED
1162	# define WCONTINUED 0	1228	# define WCONTINUED 0
1163	#endif	1229	#endif
1164		1230
		1231	/* called on sigchld etc., calls waitpid */
1165	static void	1232	static void
1166	childcb (EV_P_ ev_signal *sw, int revents)	1233	childcb (EV_P_ ev_signal *sw, int revents)
1167	{	1234	{
1168	int pid, status;	1235	int pid, status;
1169		1236
…		…
1250	/* kqueue is borked on everything but netbsd apparently */	1317	/* kqueue is borked on everything but netbsd apparently */
1251	/* 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 */
1252	flags &= ~EVBACKEND_KQUEUE;	1319	flags &= ~EVBACKEND_KQUEUE;
1253	#endif	1320	#endif
1254	#ifdef __APPLE__	1321	#ifdef __APPLE__
1255	// flags &= ~EVBACKEND_KQUEUE; for documentation	1322	/* only select works correctly on that "unix-certified" platform */
1256	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 */
1257	#endif	1325	#endif
1258		1326
1259	return flags;	1327	return flags;
1260	}	1328	}
1261		1329
…		…
1293	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1361	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1294	{	1362	{
1295	timeout_blocktime = interval;	1363	timeout_blocktime = interval;
1296	}	1364	}
1297		1365
		1366	/* initialise a loop structure, must be zero-initialised */
1298	static void noinline	1367	static void noinline
1299	loop_init (EV_P_ unsigned int flags)	1368	loop_init (EV_P_ unsigned int flags)
1300	{	1369	{
1301	if (!backend)	1370	if (!backend)
1302	{	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
1303	#if EV_USE_MONOTONIC	1382	#if EV_USE_MONOTONIC
		1383	if (!have_monotonic)
1304	{	1384	{
1305	struct timespec ts;	1385	struct timespec ts;
		1386
1306	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1387	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1307	have_monotonic = 1;	1388	have_monotonic = 1;
1308	}	1389	}
1309	#endif	1390	#endif
1310		1391
1311	ev_rt_now = ev_time ();	1392	ev_rt_now = ev_time ();
1312	mn_now = get_clock ();	1393	mn_now = get_clock ();
1313	now_floor = mn_now;	1394	now_floor = mn_now;
…		…
1350	#endif	1431	#endif
1351	#if EV_USE_SELECT	1432	#if EV_USE_SELECT
1352	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1433	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1353	#endif	1434	#endif
1354		1435
		1436	ev_prepare_init (&pending_w, pendingcb);
		1437
1355	ev_init (&pipeev, pipecb);	1438	ev_init (&pipe_w, pipecb);
1356	ev_set_priority (&pipeev, EV_MAXPRI);	1439	ev_set_priority (&pipe_w, EV_MAXPRI);
1357	}	1440	}
1358	}	1441	}
1359		1442
		1443	/* free up a loop structure */
1360	static void noinline	1444	static void noinline
1361	loop_destroy (EV_P)	1445	loop_destroy (EV_P)
1362	{	1446	{
1363	int i;	1447	int i;
1364		1448
1365	if (ev_is_active (&pipeev))	1449	if (ev_is_active (&pipe_w))
1366	{	1450	{
1367	ev_ref (EV_A); /* signal watcher */	1451	ev_ref (EV_A); /* signal watcher */
1368	ev_io_stop (EV_A_ &pipeev);	1452	ev_io_stop (EV_A_ &pipe_w);
1369		1453
1370	#if EV_USE_EVENTFD	1454	#if EV_USE_EVENTFD
1371	if (evfd >= 0)	1455	if (evfd >= 0)
1372	close (evfd);	1456	close (evfd);
1373	#endif	1457	#endif
…		…
1412	}	1496	}
1413		1497
1414	ev_free (anfds); anfdmax = 0;	1498	ev_free (anfds); anfdmax = 0;
1415		1499
1416	/* 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);
1417	array_free (fdchange, EMPTY);	1502	array_free (fdchange, EMPTY);
1418	array_free (timer, EMPTY);	1503	array_free (timer, EMPTY);
1419	#if EV_PERIODIC_ENABLE	1504	#if EV_PERIODIC_ENABLE
1420	array_free (periodic, EMPTY);	1505	array_free (periodic, EMPTY);
1421	#endif	1506	#endif
…		…
1430		1515
1431	backend = 0;	1516	backend = 0;
1432	}	1517	}
1433		1518
1434	#if EV_USE_INOTIFY	1519	#if EV_USE_INOTIFY
1435	void inline_size infy_fork (EV_P);	1520	inline_size void infy_fork (EV_P);
1436	#endif	1521	#endif
1437		1522
1438	void inline_size	1523	inline_size void
1439	loop_fork (EV_P)	1524	loop_fork (EV_P)
1440	{	1525	{
1441	#if EV_USE_PORT	1526	#if EV_USE_PORT
1442	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1527	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1443	#endif	1528	#endif
…		…
1449	#endif	1534	#endif
1450	#if EV_USE_INOTIFY	1535	#if EV_USE_INOTIFY
1451	infy_fork (EV_A);	1536	infy_fork (EV_A);
1452	#endif	1537	#endif
1453		1538
1454	if (ev_is_active (&pipeev))	1539	if (ev_is_active (&pipe_w))
1455	{	1540	{
1456	/* this "locks" the handlers against writing to the pipe */	1541	/* this "locks" the handlers against writing to the pipe */
1457	/* while we modify the fd vars */	1542	/* while we modify the fd vars */
1458	gotsig = 1;	1543	gotsig = 1;
1459	#if EV_ASYNC_ENABLE	1544	#if EV_ASYNC_ENABLE
1460	gotasync = 1;	1545	gotasync = 1;
1461	#endif	1546	#endif
1462		1547
1463	ev_ref (EV_A);	1548	ev_ref (EV_A);
1464	ev_io_stop (EV_A_ &pipeev);	1549	ev_io_stop (EV_A_ &pipe_w);
1465		1550
1466	#if EV_USE_EVENTFD	1551	#if EV_USE_EVENTFD
1467	if (evfd >= 0)	1552	if (evfd >= 0)
1468	close (evfd);	1553	close (evfd);
1469	#endif	1554	#endif
…		…
1474	close (evpipe [1]);	1559	close (evpipe [1]);
1475	}	1560	}
1476		1561
1477	evpipe_init (EV_A);	1562	evpipe_init (EV_A);
1478	/* now iterate over everything, in case we missed something */	1563	/* now iterate over everything, in case we missed something */
1479	pipecb (EV_A_ &pipeev, EV_READ);	1564	pipecb (EV_A_ &pipe_w, EV_READ);
1480	}	1565	}
1481		1566
1482	postfork = 0;	1567	postfork = 0;
1483	}	1568	}
1484		1569
…		…
1514		1599
1515	#if EV_VERIFY	1600	#if EV_VERIFY
1516	static void noinline	1601	static void noinline
1517	verify_watcher (EV_P_ W w)	1602	verify_watcher (EV_P_ W w)
1518	{	1603	{
1519	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1604	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1520		1605
1521	if (w->pending)	1606	if (w->pending)
1522	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));
1523	}	1608	}
1524		1609
1525	static void noinline	1610	static void noinline
1526	verify_heap (EV_P_ ANHE *heap, int N)	1611	verify_heap (EV_P_ ANHE *heap, int N)
1527	{	1612	{
1528	int i;	1613	int i;
1529		1614
1530	for (i = HEAP0; i < N + HEAP0; ++i)	1615	for (i = HEAP0; i < N + HEAP0; ++i)
1531	{	1616	{
1532	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));
1533	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])));
1534	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]))));
1535		1620
1536	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1621	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1537	}	1622	}
1538	}	1623	}
1539		1624
1540	static void noinline	1625	static void noinline
1541	array_verify (EV_P_ W *ws, int cnt)	1626	array_verify (EV_P_ W *ws, int cnt)
1542	{	1627	{
1543	while (cnt--)	1628	while (cnt--)
1544	{	1629	{
1545	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1630	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1546	verify_watcher (EV_A_ ws [cnt]);	1631	verify_watcher (EV_A_ ws [cnt]);
1547	}	1632	}
1548	}	1633	}
1549	#endif	1634	#endif
1550		1635
…		…
1557		1642
1558	assert (activecnt >= -1);	1643	assert (activecnt >= -1);
1559		1644
1560	assert (fdchangemax >= fdchangecnt);	1645	assert (fdchangemax >= fdchangecnt);
1561	for (i = 0; i < fdchangecnt; ++i)	1646	for (i = 0; i < fdchangecnt; ++i)
1562	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1647	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1563		1648
1564	assert (anfdmax >= 0);	1649	assert (anfdmax >= 0);
1565	for (i = 0; i < anfdmax; ++i)	1650	for (i = 0; i < anfdmax; ++i)
1566	for (w = anfds [i].head; w; w = w->next)	1651	for (w = anfds [i].head; w; w = w->next)
1567	{	1652	{
1568	verify_watcher (EV_A_ (W)w);	1653	verify_watcher (EV_A_ (W)w);
1569	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1654	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1570	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));	1655	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1571	}	1656	}
1572		1657
1573	assert (timermax >= timercnt);	1658	assert (timermax >= timercnt);
1574	verify_heap (EV_A_ timers, timercnt);	1659	verify_heap (EV_A_ timers, timercnt);
1575		1660
…		…
1652	{	1737	{
1653	#if EV_MULTIPLICITY	1738	#if EV_MULTIPLICITY
1654	struct ev_loop *loop = ev_default_loop_ptr;	1739	struct ev_loop *loop = ev_default_loop_ptr;
1655	#endif	1740	#endif
1656		1741
		1742	ev_default_loop_ptr = 0;
		1743
1657	#ifndef _WIN32	1744	#ifndef _WIN32
1658	ev_ref (EV_A); /* child watcher */	1745	ev_ref (EV_A); /* child watcher */
1659	ev_signal_stop (EV_A_ &childev);	1746	ev_signal_stop (EV_A_ &childev);
1660	#endif	1747	#endif
1661		1748
…		…
1667	{	1754	{
1668	#if EV_MULTIPLICITY	1755	#if EV_MULTIPLICITY
1669	struct ev_loop *loop = ev_default_loop_ptr;	1756	struct ev_loop *loop = ev_default_loop_ptr;
1670	#endif	1757	#endif
1671		1758
1672	if (backend)
1673	postfork = 1; /* must be in line with ev_loop_fork */	1759	postfork = 1; /* must be in line with ev_loop_fork */
1674	}	1760	}
1675		1761
1676	/*****************************************************************************/	1762	/*****************************************************************************/
1677		1763
1678	void	1764	void
1679	ev_invoke (EV_P_ void *w, int revents)	1765	ev_invoke (EV_P_ void *w, int revents)
1680	{	1766	{
1681	EV_CB_INVOKE ((W)w, revents);	1767	EV_CB_INVOKE ((W)w, revents);
1682	}	1768	}
1683		1769
1684	void inline_speed	1770	inline_speed void
1685	call_pending (EV_P)	1771	call_pending (EV_P)
1686	{	1772	{
1687	int pri;	1773	int pri;
1688		1774
1689	for (pri = NUMPRI; pri--; )	1775	for (pri = NUMPRI; pri--; )
1690	while (pendingcnt [pri])	1776	while (pendingcnt [pri])
1691	{	1777	{
1692	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1778	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1693		1779
1694	if (expect_true (p->w))
1695	{
1696	/*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 */
1697		1782
1698	p->w->pending = 0;	1783	p->w->pending = 0;
1699	EV_CB_INVOKE (p->w, p->events);	1784	EV_CB_INVOKE (p->w, p->events);
1700	EV_FREQUENT_CHECK;	1785	EV_FREQUENT_CHECK;
1701	}
1702	}	1786	}
1703	}	1787	}
1704		1788
1705	#if EV_IDLE_ENABLE	1789	#if EV_IDLE_ENABLE
1706	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
1707	idle_reify (EV_P)	1793	idle_reify (EV_P)
1708	{	1794	{
1709	if (expect_false (idleall))	1795	if (expect_false (idleall))
1710	{	1796	{
1711	int pri;	1797	int pri;
…		…
1723	}	1809	}
1724	}	1810	}
1725	}	1811	}
1726	#endif	1812	#endif
1727		1813
1728	void inline_size	1814	/* make timers pending */
		1815	inline_size void
1729	timers_reify (EV_P)	1816	timers_reify (EV_P)
1730	{	1817	{
1731	EV_FREQUENT_CHECK;	1818	EV_FREQUENT_CHECK;
1732		1819
1733	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1820	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1734	{	1821	{
1735	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1822	do
1736
1737	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1738
1739	/* first reschedule or stop timer */
1740	if (w->repeat)
1741	{	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	{
1742	ev_at (w) += w->repeat;	1831	ev_at (w) += w->repeat;
1743	if (ev_at (w) < mn_now)	1832	if (ev_at (w) < mn_now)
1744	ev_at (w) = mn_now;	1833	ev_at (w) = mn_now;
1745		1834
1746	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.));
1747		1836
1748	ANHE_at_cache (timers [HEAP0]);	1837	ANHE_at_cache (timers [HEAP0]);
1749	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);
1750	}	1845	}
1751	else	1846	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1752	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1753		1847
1754	EV_FREQUENT_CHECK;
1755	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1848	feed_reverse_done (EV_A_ EV_TIMEOUT);
1756	}	1849	}
1757	}	1850	}
1758		1851
1759	#if EV_PERIODIC_ENABLE	1852	#if EV_PERIODIC_ENABLE
1760	void inline_size	1853	/* make periodics pending */
		1854	inline_size void
1761	periodics_reify (EV_P)	1855	periodics_reify (EV_P)
1762	{	1856	{
1763	EV_FREQUENT_CHECK;	1857	EV_FREQUENT_CHECK;
1764		1858
1765	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1859	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1766	{	1860	{
1767	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1861	int feed_count = 0;
1768		1862
1769	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1863	do
1770
1771	/* first reschedule or stop timer */
1772	if (w->reschedule_cb)
1773	{	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	{
1774	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1872	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1775		1873
1776	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));
1777		1875
1778	ANHE_at_cache (periodics [HEAP0]);	1876	ANHE_at_cache (periodics [HEAP0]);
1779	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);
1780	}	1903	}
1781	else if (w->interval)	1904	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1782	{
1783	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1784	/* if next trigger time is not sufficiently in the future, put it there */
1785	/* this might happen because of floating point inexactness */
1786	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1787	{
1788	ev_at (w) += w->interval;
1789		1905
1790	/* if interval is unreasonably low we might still have a time in the past */
1791	/* so correct this. this will make the periodic very inexact, but the user */
1792	/* has effectively asked to get triggered more often than possible */
1793	if (ev_at (w) < ev_rt_now)
1794	ev_at (w) = ev_rt_now;
1795	}
1796
1797	ANHE_at_cache (periodics [HEAP0]);
1798	downheap (periodics, periodiccnt, HEAP0);
1799	}
1800	else
1801	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1802
1803	EV_FREQUENT_CHECK;
1804	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1906	feed_reverse_done (EV_A_ EV_PERIODIC);
1805	}	1907	}
1806	}	1908	}
1807		1909
		1910	/* simply recalculate all periodics */
		1911	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1808	static void noinline	1912	static void noinline
1809	periodics_reschedule (EV_P)	1913	periodics_reschedule (EV_P)
1810	{	1914	{
1811	int i;	1915	int i;
1812		1916
…		…
1825		1929
1826	reheap (periodics, periodiccnt);	1930	reheap (periodics, periodiccnt);
1827	}	1931	}
1828	#endif	1932	#endif
1829		1933
1830	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
1831	time_update (EV_P_ ev_tstamp max_block)	1951	time_update (EV_P_ ev_tstamp max_block)
1832	{	1952	{
1833	int i;
1834
1835	#if EV_USE_MONOTONIC	1953	#if EV_USE_MONOTONIC
1836	if (expect_true (have_monotonic))	1954	if (expect_true (have_monotonic))
1837	{	1955	{
		1956	int i;
1838	ev_tstamp odiff = rtmn_diff;	1957	ev_tstamp odiff = rtmn_diff;
1839		1958
1840	mn_now = get_clock ();	1959	mn_now = get_clock ();
1841		1960
1842	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1961	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1868	ev_rt_now = ev_time ();	1987	ev_rt_now = ev_time ();
1869	mn_now = get_clock ();	1988	mn_now = get_clock ();
1870	now_floor = mn_now;	1989	now_floor = mn_now;
1871	}	1990	}
1872		1991
		1992	/* no timer adjustment, as the monotonic clock doesn't jump */
		1993	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1873	# if EV_PERIODIC_ENABLE	1994	# if EV_PERIODIC_ENABLE
1874	periodics_reschedule (EV_A);	1995	periodics_reschedule (EV_A);
1875	# endif	1996	# endif
1876	/* no timer adjustment, as the monotonic clock doesn't jump */
1877	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1878	}	1997	}
1879	else	1998	else
1880	#endif	1999	#endif
1881	{	2000	{
1882	ev_rt_now = ev_time ();	2001	ev_rt_now = ev_time ();
1883		2002
1884	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))
1885	{	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);
1886	#if EV_PERIODIC_ENABLE	2007	#if EV_PERIODIC_ENABLE
1887	periodics_reschedule (EV_A);	2008	periodics_reschedule (EV_A);
1888	#endif	2009	#endif
1889	/* adjust timers. this is easy, as the offset is the same for all of them */
1890	for (i = 0; i < timercnt; ++i)
1891	{
1892	ANHE *he = timers + i + HEAP0;
1893	ANHE_w (*he)->at += ev_rt_now - mn_now;
1894	ANHE_at_cache (*he);
1895	}
1896	}	2010	}
1897		2011
1898	mn_now = ev_rt_now;	2012	mn_now = ev_rt_now;
1899	}	2013	}
1900	}
1901
1902	void
1903	ev_ref (EV_P)
1904	{
1905	++activecnt;
1906	}
1907
1908	void
1909	ev_unref (EV_P)
1910	{
1911	--activecnt;
1912	}	2014	}
1913		2015
1914	static int loop_done;	2016	static int loop_done;
1915		2017
1916	void	2018	void
…		…
1950	{	2052	{
1951	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2053	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1952	call_pending (EV_A);	2054	call_pending (EV_A);
1953	}	2055	}
1954		2056
1955	if (expect_false (!activecnt))
1956	break;
1957
1958	/* we might have forked, so reify kernel state if necessary */	2057	/* we might have forked, so reify kernel state if necessary */
1959	if (expect_false (postfork))	2058	if (expect_false (postfork))
1960	loop_fork (EV_A);	2059	loop_fork (EV_A);
1961		2060
1962	/* update fd-related kernel structures */	2061	/* update fd-related kernel structures */
…		…
2041	ev_unloop (EV_P_ int how)	2140	ev_unloop (EV_P_ int how)
2042	{	2141	{
2043	loop_done = how;	2142	loop_done = how;
2044	}	2143	}
2045		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
2046	/*****************************************************************************/	2182	/*****************************************************************************/
		2183	/* singly-linked list management, used when the expected list length is short */
2047		2184
2048	void inline_size	2185	inline_size void
2049	wlist_add (WL *head, WL elem)	2186	wlist_add (WL *head, WL elem)
2050	{	2187	{
2051	elem->next = *head;	2188	elem->next = *head;
2052	*head = elem;	2189	*head = elem;
2053	}	2190	}
2054		2191
2055	void inline_size	2192	inline_size void
2056	wlist_del (WL *head, WL elem)	2193	wlist_del (WL *head, WL elem)
2057	{	2194	{
2058	while (*head)	2195	while (*head)
2059	{	2196	{
2060	if (*head == elem)	2197	if (*head == elem)
…		…
2065		2202
2066	head = &(*head)->next;	2203	head = &(*head)->next;
2067	}	2204	}
2068	}	2205	}
2069		2206
2070	void inline_speed	2207	/* internal, faster, version of ev_clear_pending */
		2208	inline_speed void
2071	clear_pending (EV_P_ W w)	2209	clear_pending (EV_P_ W w)
2072	{	2210	{
2073	if (w->pending)	2211	if (w->pending)
2074	{	2212	{
2075	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2213	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2076	w->pending = 0;	2214	w->pending = 0;
2077	}	2215	}
2078	}	2216	}
2079		2217
2080	int	2218	int
…		…
2084	int pending = w_->pending;	2222	int pending = w_->pending;
2085		2223
2086	if (expect_true (pending))	2224	if (expect_true (pending))
2087	{	2225	{
2088	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2226	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2227	p->w = (W)&pending_w;
2089	w_->pending = 0;	2228	w_->pending = 0;
2090	p->w = 0;
2091	return p->events;	2229	return p->events;
2092	}	2230	}
2093	else	2231	else
2094	return 0;	2232	return 0;
2095	}	2233	}
2096		2234
2097	void inline_size	2235	inline_size void
2098	pri_adjust (EV_P_ W w)	2236	pri_adjust (EV_P_ W w)
2099	{	2237	{
2100	int pri = w->priority;	2238	int pri = w->priority;
2101	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2239	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2102	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2240	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2103	w->priority = pri;	2241	w->priority = pri;
2104	}	2242	}
2105		2243
2106	void inline_speed	2244	inline_speed void
2107	ev_start (EV_P_ W w, int active)	2245	ev_start (EV_P_ W w, int active)
2108	{	2246	{
2109	pri_adjust (EV_A_ w);	2247	pri_adjust (EV_A_ w);
2110	w->active = active;	2248	w->active = active;
2111	ev_ref (EV_A);	2249	ev_ref (EV_A);
2112	}	2250	}
2113		2251
2114	void inline_size	2252	inline_size void
2115	ev_stop (EV_P_ W w)	2253	ev_stop (EV_P_ W w)
2116	{	2254	{
2117	ev_unref (EV_A);	2255	ev_unref (EV_A);
2118	w->active = 0;	2256	w->active = 0;
2119	}	2257	}
…		…
2126	int fd = w->fd;	2264	int fd = w->fd;
2127		2265
2128	if (expect_false (ev_is_active (w)))	2266	if (expect_false (ev_is_active (w)))
2129	return;	2267	return;
2130		2268
2131	assert (("ev_io_start called with negative fd", fd >= 0));	2269	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2270	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2132		2271
2133	EV_FREQUENT_CHECK;	2272	EV_FREQUENT_CHECK;
2134		2273
2135	ev_start (EV_A_ (W)w, 1);	2274	ev_start (EV_A_ (W)w, 1);
2136	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2275	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2137	wlist_add (&anfds[fd].head, (WL)w);	2276	wlist_add (&anfds[fd].head, (WL)w);
2138		2277
2139	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2278	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2140	w->events &= ~EV_IOFDSET;	2279	w->events &= ~EV__IOFDSET;
2141		2280
2142	EV_FREQUENT_CHECK;	2281	EV_FREQUENT_CHECK;
2143	}	2282	}
2144		2283
2145	void noinline	2284	void noinline
…		…
2147	{	2286	{
2148	clear_pending (EV_A_ (W)w);	2287	clear_pending (EV_A_ (W)w);
2149	if (expect_false (!ev_is_active (w)))	2288	if (expect_false (!ev_is_active (w)))
2150	return;	2289	return;
2151		2290
2152	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));
2153		2292
2154	EV_FREQUENT_CHECK;	2293	EV_FREQUENT_CHECK;
2155		2294
2156	wlist_del (&anfds[w->fd].head, (WL)w);	2295	wlist_del (&anfds[w->fd].head, (WL)w);
2157	ev_stop (EV_A_ (W)w);	2296	ev_stop (EV_A_ (W)w);
…		…
2167	if (expect_false (ev_is_active (w)))	2306	if (expect_false (ev_is_active (w)))
2168	return;	2307	return;
2169		2308
2170	ev_at (w) += mn_now;	2309	ev_at (w) += mn_now;
2171		2310
2172	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.));
2173		2312
2174	EV_FREQUENT_CHECK;	2313	EV_FREQUENT_CHECK;
2175		2314
2176	++timercnt;	2315	++timercnt;
2177	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2316	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2180	ANHE_at_cache (timers [ev_active (w)]);	2319	ANHE_at_cache (timers [ev_active (w)]);
2181	upheap (timers, ev_active (w));	2320	upheap (timers, ev_active (w));
2182		2321
2183	EV_FREQUENT_CHECK;	2322	EV_FREQUENT_CHECK;
2184		2323
2185	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2324	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2186	}	2325	}
2187		2326
2188	void noinline	2327	void noinline
2189	ev_timer_stop (EV_P_ ev_timer *w)	2328	ev_timer_stop (EV_P_ ev_timer *w)
2190	{	2329	{
…		…
2195	EV_FREQUENT_CHECK;	2334	EV_FREQUENT_CHECK;
2196		2335
2197	{	2336	{
2198	int active = ev_active (w);	2337	int active = ev_active (w);
2199		2338
2200	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2339	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2201		2340
2202	--timercnt;	2341	--timercnt;
2203		2342
2204	if (expect_true (active < timercnt + HEAP0))	2343	if (expect_true (active < timercnt + HEAP0))
2205	{	2344	{
…		…
2249		2388
2250	if (w->reschedule_cb)	2389	if (w->reschedule_cb)
2251	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2390	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2252	else if (w->interval)	2391	else if (w->interval)
2253	{	2392	{
2254	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.));
2255	/* 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 */
2256	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;
2257	}	2396	}
2258	else	2397	else
2259	ev_at (w) = w->offset;	2398	ev_at (w) = w->offset;
…		…
2267	ANHE_at_cache (periodics [ev_active (w)]);	2406	ANHE_at_cache (periodics [ev_active (w)]);
2268	upheap (periodics, ev_active (w));	2407	upheap (periodics, ev_active (w));
2269		2408
2270	EV_FREQUENT_CHECK;	2409	EV_FREQUENT_CHECK;
2271		2410
2272	/*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));*/
2273	}	2412	}
2274		2413
2275	void noinline	2414	void noinline
2276	ev_periodic_stop (EV_P_ ev_periodic *w)	2415	ev_periodic_stop (EV_P_ ev_periodic *w)
2277	{	2416	{
…		…
2282	EV_FREQUENT_CHECK;	2421	EV_FREQUENT_CHECK;
2283		2422
2284	{	2423	{
2285	int active = ev_active (w);	2424	int active = ev_active (w);
2286		2425
2287	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2426	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2288		2427
2289	--periodiccnt;	2428	--periodiccnt;
2290		2429
2291	if (expect_true (active < periodiccnt + HEAP0))	2430	if (expect_true (active < periodiccnt + HEAP0))
2292	{	2431	{
…		…
2315		2454
2316	void noinline	2455	void noinline
2317	ev_signal_start (EV_P_ ev_signal *w)	2456	ev_signal_start (EV_P_ ev_signal *w)
2318	{	2457	{
2319	#if EV_MULTIPLICITY	2458	#if EV_MULTIPLICITY
2320	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));
2321	#endif	2460	#endif
2322	if (expect_false (ev_is_active (w)))	2461	if (expect_false (ev_is_active (w)))
2323	return;	2462	return;
2324		2463
2325	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));
2326		2465
2327	evpipe_init (EV_A);	2466	evpipe_init (EV_A);
2328		2467
2329	EV_FREQUENT_CHECK;	2468	EV_FREQUENT_CHECK;
2330		2469
…		…
2333	sigset_t full, prev;	2472	sigset_t full, prev;
2334	sigfillset (&full);	2473	sigfillset (&full);
2335	sigprocmask (SIG_SETMASK, &full, &prev);	2474	sigprocmask (SIG_SETMASK, &full, &prev);
2336	#endif	2475	#endif
2337		2476
2338	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2477	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2339		2478
2340	#ifndef _WIN32	2479	#ifndef _WIN32
2341	sigprocmask (SIG_SETMASK, &prev, 0);	2480	sigprocmask (SIG_SETMASK, &prev, 0);
2342	#endif	2481	#endif
2343	}	2482	}
…		…
2381		2520
2382	void	2521	void
2383	ev_child_start (EV_P_ ev_child *w)	2522	ev_child_start (EV_P_ ev_child *w)
2384	{	2523	{
2385	#if EV_MULTIPLICITY	2524	#if EV_MULTIPLICITY
2386	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));
2387	#endif	2526	#endif
2388	if (expect_false (ev_is_active (w)))	2527	if (expect_false (ev_is_active (w)))
2389	return;	2528	return;
2390		2529
2391	EV_FREQUENT_CHECK;	2530	EV_FREQUENT_CHECK;
…		…
2416	# ifdef _WIN32	2555	# ifdef _WIN32
2417	# undef lstat	2556	# undef lstat
2418	# define lstat(a,b) _stati64 (a,b)	2557	# define lstat(a,b) _stati64 (a,b)
2419	# endif	2558	# endif
2420		2559
2421	#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 */
2422	#define MIN_STAT_INTERVAL 0.1074891	2562	#define MIN_STAT_INTERVAL 0.1074891
2423		2563
2424	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);
2425		2565
2426	#if EV_USE_INOTIFY	2566	#if EV_USE_INOTIFY
2427	# define EV_INOTIFY_BUFSIZE 8192	2567	# define EV_INOTIFY_BUFSIZE 8192
…		…
2431	{	2571	{
2432	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);	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);
2433		2573
2434	if (w->wd < 0)	2574	if (w->wd < 0)
2435	{	2575	{
		2576	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2436	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2577	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2437		2578
2438	/* monitor some parent directory for speedup hints */	2579	/* monitor some parent directory for speedup hints */
2439	/* note that exceeding the hardcoded limit is not a correctness issue, */	2580	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2440	/* but an efficiency issue only */	2581	/* but an efficiency issue only */
2441	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2582	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2442	{	2583	{
2443	char path [4096];	2584	char path [4096];
2444	strcpy (path, w->path);	2585	strcpy (path, w->path);
…		…
2448	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2589	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2449	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2590	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2450		2591
2451	char *pend = strrchr (path, '/');	2592	char *pend = strrchr (path, '/');
2452		2593
2453	if (!pend)	2594	if (!pend || pend == path)
2454	break; /* whoops, no '/', complain to your admin */	2595	break;
2455		2596
2456	*pend = 0;	2597	*pend = 0;
2457	w->wd = inotify_add_watch (fs_fd, path, mask);	2598	w->wd = inotify_add_watch (fs_fd, path, mask);
2458	}	2599	}
2459	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2600	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2460	}	2601	}
2461	}	2602	}
2462	else
2463	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2464		2603
2465	if (w->wd >= 0)	2604	if (w->wd >= 0)
		2605	{
2466	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	}
2467	}	2625	}
2468		2626
2469	static void noinline	2627	static void noinline
2470	infy_del (EV_P_ ev_stat *w)	2628	infy_del (EV_P_ ev_stat *w)
2471	{	2629	{
…		…
2485		2643
2486	static void noinline	2644	static void noinline
2487	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)	2645	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2488	{	2646	{
2489	if (slot < 0)	2647	if (slot < 0)
2490	/* overflow, need to check for all hahs slots */	2648	/* overflow, need to check for all hash slots */
2491	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	2649	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2492	infy_wd (EV_A_ slot, wd, ev);	2650	infy_wd (EV_A_ slot, wd, ev);
2493	else	2651	else
2494	{	2652	{
2495	WL w_;	2653	WL w_;
…		…
2501		2659
2502	if (w->wd == wd || wd == -1)	2660	if (w->wd == wd || wd == -1)
2503	{	2661	{
2504	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2662	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2505	{	2663	{
		2664	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2506	w->wd = -1;	2665	w->wd = -1;
2507	infy_add (EV_A_ w); /* re-add, no matter what */	2666	infy_add (EV_A_ w); /* re-add, no matter what */
2508	}	2667	}
2509		2668
2510	stat_timer_cb (EV_A_ &w->timer, 0);	2669	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2523		2682
2524	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)
2525	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2684	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2526	}	2685	}
2527		2686
2528	void inline_size	2687	inline_size void
		2688	check_2625 (EV_P)
		2689	{
		2690	/* kernels < 2.6.25 are borked
		2691	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		2692	*/
		2693	struct utsname buf;
		2694	int major, minor, micro;
		2695
		2696	if (uname (&buf))
		2697	return;
		2698
		2699	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
		2700	return;
		2701
		2702	if (major < 2
		2703	|| (major == 2 && minor < 6)
		2704	|| (major == 2 && minor == 6 && micro < 25))
		2705	return;
		2706
		2707	fs_2625 = 1;
		2708	}
		2709
		2710	inline_size void
2529	infy_init (EV_P)	2711	infy_init (EV_P)
2530	{	2712	{
2531	if (fs_fd != -2)	2713	if (fs_fd != -2)
2532	return;	2714	return;
		2715
		2716	fs_fd = -1;
		2717
		2718	check_2625 (EV_A);
2533		2719
2534	fs_fd = inotify_init ();	2720	fs_fd = inotify_init ();
2535		2721
2536	if (fs_fd >= 0)	2722	if (fs_fd >= 0)
2537	{	2723	{
…		…
2539	ev_set_priority (&fs_w, EV_MAXPRI);	2725	ev_set_priority (&fs_w, EV_MAXPRI);
2540	ev_io_start (EV_A_ &fs_w);	2726	ev_io_start (EV_A_ &fs_w);
2541	}	2727	}
2542	}	2728	}
2543		2729
2544	void inline_size	2730	inline_size void
2545	infy_fork (EV_P)	2731	infy_fork (EV_P)
2546	{	2732	{
2547	int slot;	2733	int slot;
2548		2734
2549	if (fs_fd < 0)	2735	if (fs_fd < 0)
…		…
2565	w->wd = -1;	2751	w->wd = -1;
2566		2752
2567	if (fs_fd >= 0)	2753	if (fs_fd >= 0)
2568	infy_add (EV_A_ w); /* re-add, no matter what */	2754	infy_add (EV_A_ w); /* re-add, no matter what */
2569	else	2755	else
2570	ev_timer_start (EV_A_ &w->timer);	2756	ev_timer_again (EV_A_ &w->timer);
2571	}	2757	}
2572
2573	}	2758	}
2574	}	2759	}
2575		2760
2576	#endif	2761	#endif
2577		2762
…		…
2613	|| w->prev.st_atime != w->attr.st_atime	2798	|| w->prev.st_atime != w->attr.st_atime
2614	|| w->prev.st_mtime != w->attr.st_mtime	2799	|| w->prev.st_mtime != w->attr.st_mtime
2615	|| w->prev.st_ctime != w->attr.st_ctime	2800	|| w->prev.st_ctime != w->attr.st_ctime
2616	) {	2801	) {
2617	#if EV_USE_INOTIFY	2802	#if EV_USE_INOTIFY
		2803	if (fs_fd >= 0)
		2804	{
2618	infy_del (EV_A_ w);	2805	infy_del (EV_A_ w);
2619	infy_add (EV_A_ w);	2806	infy_add (EV_A_ w);
2620	ev_stat_stat (EV_A_ w); /* avoid race... */	2807	ev_stat_stat (EV_A_ w); /* avoid race... */
		2808	}
2621	#endif	2809	#endif
2622		2810
2623	ev_feed_event (EV_A_ w, EV_STAT);	2811	ev_feed_event (EV_A_ w, EV_STAT);
2624	}	2812	}
2625	}	2813	}
…		…
2628	ev_stat_start (EV_P_ ev_stat *w)	2816	ev_stat_start (EV_P_ ev_stat *w)
2629	{	2817	{
2630	if (expect_false (ev_is_active (w)))	2818	if (expect_false (ev_is_active (w)))
2631	return;	2819	return;
2632		2820
2633	/* since we use memcmp, we need to clear any padding data etc. */
2634	memset (&w->prev, 0, sizeof (ev_statdata));
2635	memset (&w->attr, 0, sizeof (ev_statdata));
2636
2637	ev_stat_stat (EV_A_ w);	2821	ev_stat_stat (EV_A_ w);
2638		2822
		2823	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2639	if (w->interval < MIN_STAT_INTERVAL)	2824	w->interval = MIN_STAT_INTERVAL;
2640	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2641		2825
2642	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);
2643	ev_set_priority (&w->timer, ev_priority (w));	2827	ev_set_priority (&w->timer, ev_priority (w));
2644		2828
2645	#if EV_USE_INOTIFY	2829	#if EV_USE_INOTIFY
2646	infy_init (EV_A);	2830	infy_init (EV_A);
2647		2831
2648	if (fs_fd >= 0)	2832	if (fs_fd >= 0)
2649	infy_add (EV_A_ w);	2833	infy_add (EV_A_ w);
2650	else	2834	else
2651	#endif	2835	#endif
2652	ev_timer_start (EV_A_ &w->timer);	2836	ev_timer_again (EV_A_ &w->timer);
2653		2837
2654	ev_start (EV_A_ (W)w, 1);	2838	ev_start (EV_A_ (W)w, 1);
2655		2839
2656	EV_FREQUENT_CHECK;	2840	EV_FREQUENT_CHECK;
2657	}	2841	}
…		…
2827	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3011	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2828	}	3012	}
2829	}	3013	}
2830	}	3014	}
2831		3015
		3016	static void
		3017	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		3018	{
		3019	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		3020
		3021	ev_embed_stop (EV_A_ w);
		3022
		3023	{
		3024	struct ev_loop *loop = w->other;
		3025
		3026	ev_loop_fork (EV_A);
		3027	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		3028	}
		3029
		3030	ev_embed_start (EV_A_ w);
		3031	}
		3032
2832	#if 0	3033	#if 0
2833	static void	3034	static void
2834	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3035	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2835	{	3036	{
2836	ev_idle_stop (EV_A_ idle);	3037	ev_idle_stop (EV_A_ idle);
…		…
2843	if (expect_false (ev_is_active (w)))	3044	if (expect_false (ev_is_active (w)))
2844	return;	3045	return;
2845		3046
2846	{	3047	{
2847	struct ev_loop *loop = w->other;	3048	struct ev_loop *loop = w->other;
2848	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 ()));
2849	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);
2850	}	3051	}
2851		3052
2852	EV_FREQUENT_CHECK;	3053	EV_FREQUENT_CHECK;
2853		3054
…		…
2856		3057
2857	ev_prepare_init (&w->prepare, embed_prepare_cb);	3058	ev_prepare_init (&w->prepare, embed_prepare_cb);
2858	ev_set_priority (&w->prepare, EV_MINPRI);	3059	ev_set_priority (&w->prepare, EV_MINPRI);
2859	ev_prepare_start (EV_A_ &w->prepare);	3060	ev_prepare_start (EV_A_ &w->prepare);
2860		3061
		3062	ev_fork_init (&w->fork, embed_fork_cb);
		3063	ev_fork_start (EV_A_ &w->fork);
		3064
2861	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/	3065	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2862		3066
2863	ev_start (EV_A_ (W)w, 1);	3067	ev_start (EV_A_ (W)w, 1);
2864		3068
2865	EV_FREQUENT_CHECK;	3069	EV_FREQUENT_CHECK;
…		…
2872	if (expect_false (!ev_is_active (w)))	3076	if (expect_false (!ev_is_active (w)))
2873	return;	3077	return;
2874		3078
2875	EV_FREQUENT_CHECK;	3079	EV_FREQUENT_CHECK;
2876		3080
2877	ev_io_stop (EV_A_ &w->io);	3081	ev_io_stop (EV_A_ &w->io);
2878	ev_prepare_stop (EV_A_ &w->prepare);	3082	ev_prepare_stop (EV_A_ &w->prepare);
2879		3083	ev_fork_stop (EV_A_ &w->fork);
2880	ev_stop (EV_A_ (W)w);
2881		3084
2882	EV_FREQUENT_CHECK;	3085	EV_FREQUENT_CHECK;
2883	}	3086	}
2884	#endif	3087	#endif
2885		3088
…		…
2992	}	3195	}
2993		3196
2994	static void	3197	static void
2995	once_cb_io (EV_P_ ev_io *w, int revents)	3198	once_cb_io (EV_P_ ev_io *w, int revents)
2996	{	3199	{
2997	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3200	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3201
		3202	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2998	}	3203	}
2999		3204
3000	static void	3205	static void
3001	once_cb_to (EV_P_ ev_timer *w, int revents)	3206	once_cb_to (EV_P_ ev_timer *w, int revents)
3002	{	3207	{
3003	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3208	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3209
		3210	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3004	}	3211	}
3005		3212
3006	void	3213	void
3007	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3214	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3008	{	3215	{
…		…
3030	ev_timer_set (&once->to, timeout, 0.);	3237	ev_timer_set (&once->to, timeout, 0.);
3031	ev_timer_start (EV_A_ &once->to);	3238	ev_timer_start (EV_A_ &once->to);
3032	}	3239	}
3033	}	3240	}
3034		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
3035	#if EV_MULTIPLICITY	3350	#if EV_MULTIPLICITY
3036	#include "ev_wrap.h"	3351	#include "ev_wrap.h"
3037	#endif	3352	#endif
3038		3353
3039	#ifdef __cplusplus	3354	#ifdef __cplusplus

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