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Comparing libev/ev.c (file contents):
Revision 1.256 by root, Thu Jun 19 06:53:49 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	{
…		…
565	struct timeval tv;	617	struct timeval tv;
566		618
567	tv.tv_sec = (time_t)delay;	619	tv.tv_sec = (time_t)delay;
568	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	620	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
569		621
		622	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
		623	/* somehting nto guaranteed by newer posix versions, but guaranteed */
		624	/* by older ones */
570	select (0, 0, 0, 0, &tv);	625	select (0, 0, 0, 0, &tv);
571	#endif	626	#endif
572	}	627	}
573	}	628	}
574		629
575	/*****************************************************************************/	630	/*****************************************************************************/
576		631
577	#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 */
578		633
579	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
580	array_nextsize (int elem, int cur, int cnt)	637	array_nextsize (int elem, int cur, int cnt)
581	{	638	{
582	int ncur = cur + 1;	639	int ncur = cur + 1;
583		640
584	do	641	do
…		…
601	array_realloc (int elem, void *base, int *cur, int cnt)	658	array_realloc (int elem, void *base, int *cur, int cnt)
602	{	659	{
603	*cur = array_nextsize (elem, *cur, cnt);	660	*cur = array_nextsize (elem, *cur, cnt);
604	return ev_realloc (base, elem * *cur);	661	return ev_realloc (base, elem * *cur);
605	}	662	}
		663
		664	#define array_init_zero(base,count) \
		665	memset ((void *)(base), 0, sizeof (*(base)) * (count))
606		666
607	#define array_needsize(type,base,cur,cnt,init) \	667	#define array_needsize(type,base,cur,cnt,init) \
608	if (expect_false ((cnt) > (cur))) \	668	if (expect_false ((cnt) > (cur))) \
609	{ \	669	{ \
610	int ocur_ = (cur); \	670	int ocur_ = (cur); \
…		…
622	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	682	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
623	}	683	}
624	#endif	684	#endif
625		685
626	#define array_free(stem, idx) \	686	#define array_free(stem, idx) \
627	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
628		688
629	/*****************************************************************************/	689	/*****************************************************************************/
		690
		691	/* dummy callback for pending events */
		692	static void noinline
		693	pendingcb (EV_P_ ev_prepare *w, int revents)
		694	{
		695	}
630		696
631	void noinline	697	void noinline
632	ev_feed_event (EV_P_ void *w, int revents)	698	ev_feed_event (EV_P_ void *w, int revents)
633	{	699	{
634	W w_ = (W)w;	700	W w_ = (W)w;
…		…
643	pendings [pri][w_->pending - 1].w = w_;	709	pendings [pri][w_->pending - 1].w = w_;
644	pendings [pri][w_->pending - 1].events = revents;	710	pendings [pri][w_->pending - 1].events = revents;
645	}	711	}
646	}	712	}
647		713
648	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
649	queue_events (EV_P_ W *events, int eventcnt, int type)	730	queue_events (EV_P_ W *events, int eventcnt, int type)
650	{	731	{
651	int i;	732	int i;
652		733
653	for (i = 0; i < eventcnt; ++i)	734	for (i = 0; i < eventcnt; ++i)
654	ev_feed_event (EV_A_ events [i], type);	735	ev_feed_event (EV_A_ events [i], type);
655	}	736	}
656		737
657	/*****************************************************************************/	738	/*****************************************************************************/
658		739
659	void inline_size	740	inline_speed void
660	anfds_init (ANFD *base, int count)
661	{
662	while (count--)
663	{
664	base->head = 0;
665	base->events = EV_NONE;
666	base->reify = 0;
667
668	++base;
669	}
670	}
671
672	void inline_speed
673	fd_event (EV_P_ int fd, int revents)	741	fd_event (EV_P_ int fd, int revents)
674	{	742	{
675	ANFD *anfd = anfds + fd;	743	ANFD *anfd = anfds + fd;
676	ev_io *w;	744	ev_io *w;
677		745
…		…
689	{	757	{
690	if (fd >= 0 && fd < anfdmax)	758	if (fd >= 0 && fd < anfdmax)
691	fd_event (EV_A_ fd, revents);	759	fd_event (EV_A_ fd, revents);
692	}	760	}
693		761
694	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
695	fd_reify (EV_P)	765	fd_reify (EV_P)
696	{	766	{
697	int i;	767	int i;
698		768
699	for (i = 0; i < fdchangecnt; ++i)	769	for (i = 0; i < fdchangecnt; ++i)
…		…
714	#ifdef EV_FD_TO_WIN32_HANDLE	784	#ifdef EV_FD_TO_WIN32_HANDLE
715	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	785	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
716	#else	786	#else
717	anfd->handle = _get_osfhandle (fd);	787	anfd->handle = _get_osfhandle (fd);
718	#endif	788	#endif
719	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));
720	}	790	}
721	#endif	791	#endif
722		792
723	{	793	{
724	unsigned char o_events = anfd->events;	794	unsigned char o_events = anfd->events;
725	unsigned char o_reify = anfd->reify;	795	unsigned char o_reify = anfd->reify;
726		796
727	anfd->reify = 0;	797	anfd->reify = 0;
728	anfd->events = events;	798	anfd->events = events;
729		799
730	if (o_events != events || o_reify & EV_IOFDSET)	800	if (o_events != events || o_reify & EV__IOFDSET)
731	backend_modify (EV_A_ fd, o_events, events);	801	backend_modify (EV_A_ fd, o_events, events);
732	}	802	}
733	}	803	}
734		804
735	fdchangecnt = 0;	805	fdchangecnt = 0;
736	}	806	}
737		807
738	void inline_size	808	/* something about the given fd changed */
		809	inline_size void
739	fd_change (EV_P_ int fd, int flags)	810	fd_change (EV_P_ int fd, int flags)
740	{	811	{
741	unsigned char reify = anfds [fd].reify;	812	unsigned char reify = anfds [fd].reify;
742	anfds [fd].reify |= flags;	813	anfds [fd].reify |= flags;
743		814
…		…
747	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	818	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
748	fdchanges [fdchangecnt - 1] = fd;	819	fdchanges [fdchangecnt - 1] = fd;
749	}	820	}
750	}	821	}
751		822
752	void inline_speed	823	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		824	inline_speed void
753	fd_kill (EV_P_ int fd)	825	fd_kill (EV_P_ int fd)
754	{	826	{
755	ev_io *w;	827	ev_io *w;
756		828
757	while ((w = (ev_io *)anfds [fd].head))	829	while ((w = (ev_io *)anfds [fd].head))
…		…
759	ev_io_stop (EV_A_ w);	831	ev_io_stop (EV_A_ w);
760	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);
761	}	833	}
762	}	834	}
763		835
764	int inline_size	836	/* check whether the given fd is atcually valid, for error recovery */
		837	inline_size int
765	fd_valid (int fd)	838	fd_valid (int fd)
766	{	839	{
767	#ifdef _WIN32	840	#ifdef _WIN32
768	return _get_osfhandle (fd) != -1;	841	return _get_osfhandle (fd) != -1;
769	#else	842	#else
…		…
805		878
806	for (fd = 0; fd < anfdmax; ++fd)	879	for (fd = 0; fd < anfdmax; ++fd)
807	if (anfds [fd].events)	880	if (anfds [fd].events)
808	{	881	{
809	anfds [fd].events = 0;	882	anfds [fd].events = 0;
		883	anfds [fd].emask = 0;
810	fd_change (EV_A_ fd, EV_IOFDSET | 1);	884	fd_change (EV_A_ fd, EV__IOFDSET | 1);
811	}	885	}
812	}	886	}
813		887
814	/*****************************************************************************/	888	/*****************************************************************************/
815		889
…		…
831	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	905	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
832	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	906	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
833	#define UPHEAP_DONE(p,k) ((p) == (k))	907	#define UPHEAP_DONE(p,k) ((p) == (k))
834		908
835	/* away from the root */	909	/* away from the root */
836	void inline_speed	910	inline_speed void
837	downheap (ANHE *heap, int N, int k)	911	downheap (ANHE *heap, int N, int k)
838	{	912	{
839	ANHE he = heap [k];	913	ANHE he = heap [k];
840	ANHE *E = heap + N + HEAP0;	914	ANHE *E = heap + N + HEAP0;
841		915
…		…
881	#define HEAP0 1	955	#define HEAP0 1
882	#define HPARENT(k) ((k) >> 1)	956	#define HPARENT(k) ((k) >> 1)
883	#define UPHEAP_DONE(p,k) (!(p))	957	#define UPHEAP_DONE(p,k) (!(p))
884		958
885	/* away from the root */	959	/* away from the root */
886	void inline_speed	960	inline_speed void
887	downheap (ANHE *heap, int N, int k)	961	downheap (ANHE *heap, int N, int k)
888	{	962	{
889	ANHE he = heap [k];	963	ANHE he = heap [k];
890		964
891	for (;;)	965	for (;;)
…		…
911	ev_active (ANHE_w (he)) = k;	985	ev_active (ANHE_w (he)) = k;
912	}	986	}
913	#endif	987	#endif
914		988
915	/* towards the root */	989	/* towards the root */
916	void inline_speed	990	inline_speed void
917	upheap (ANHE *heap, int k)	991	upheap (ANHE *heap, int k)
918	{	992	{
919	ANHE he = heap [k];	993	ANHE he = heap [k];
920		994
921	for (;;)	995	for (;;)
…		…
932		1006
933	heap [k] = he;	1007	heap [k] = he;
934	ev_active (ANHE_w (he)) = k;	1008	ev_active (ANHE_w (he)) = k;
935	}	1009	}
936		1010
937	void inline_size	1011	/* move an element suitably so it is in a correct place */
		1012	inline_size void
938	adjustheap (ANHE *heap, int N, int k)	1013	adjustheap (ANHE *heap, int N, int k)
939	{	1014	{
940	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]))
941	upheap (heap, k);	1016	upheap (heap, k);
942	else	1017	else
943	downheap (heap, N, k);	1018	downheap (heap, N, k);
944	}	1019	}
945		1020
946	/* 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 */
947	void inline_size	1022	inline_size void
948	reheap (ANHE *heap, int N)	1023	reheap (ANHE *heap, int N)
949	{	1024	{
950	int i;	1025	int i;
951		1026
952	/* 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 */
…		…
955	upheap (heap, i + HEAP0);	1030	upheap (heap, i + HEAP0);
956	}	1031	}
957		1032
958	/*****************************************************************************/	1033	/*****************************************************************************/
959		1034
		1035	/* associate signal watchers to a signal signal */
960	typedef struct	1036	typedef struct
961	{	1037	{
962	WL head;	1038	WL head;
963	EV_ATOMIC_T gotsig;	1039	EV_ATOMIC_T gotsig;
964	} ANSIG;	1040	} ANSIG;
…		…
966	static ANSIG *signals;	1042	static ANSIG *signals;
967	static int signalmax;	1043	static int signalmax;
968		1044
969	static EV_ATOMIC_T gotsig;	1045	static EV_ATOMIC_T gotsig;
970		1046
971	void inline_size
972	signals_init (ANSIG *base, int count)
973	{
974	while (count--)
975	{
976	base->head = 0;
977	base->gotsig = 0;
978
979	++base;
980	}
981	}
982
983	/*****************************************************************************/	1047	/*****************************************************************************/
984		1048
985	void inline_speed	1049	/* used to prepare libev internal fd's */
		1050	/* this is not fork-safe */
		1051	inline_speed void
986	fd_intern (int fd)	1052	fd_intern (int fd)
987	{	1053	{
988	#ifdef _WIN32	1054	#ifdef _WIN32
989	unsigned long arg = 1;	1055	unsigned long arg = 1;
990	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1056	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
995	}	1061	}
996		1062
997	static void noinline	1063	static void noinline
998	evpipe_init (EV_P)	1064	evpipe_init (EV_P)
999	{	1065	{
1000	if (!ev_is_active (&pipeev))	1066	if (!ev_is_active (&pipe_w))
1001	{	1067	{
1002	#if EV_USE_EVENTFD	1068	#if EV_USE_EVENTFD
1003	if ((evfd = eventfd (0, 0)) >= 0)	1069	if ((evfd = eventfd (0, 0)) >= 0)
1004	{	1070	{
1005	evpipe [0] = -1;	1071	evpipe [0] = -1;
1006	fd_intern (evfd);	1072	fd_intern (evfd);
1007	ev_io_set (&pipeev, evfd, EV_READ);	1073	ev_io_set (&pipe_w, evfd, EV_READ);
1008	}	1074	}
1009	else	1075	else
1010	#endif	1076	#endif
1011	{	1077	{
1012	while (pipe (evpipe))	1078	while (pipe (evpipe))
1013	syserr ("(libev) error creating signal/async pipe");	1079	ev_syserr ("(libev) error creating signal/async pipe");
1014		1080
1015	fd_intern (evpipe [0]);	1081	fd_intern (evpipe [0]);
1016	fd_intern (evpipe [1]);	1082	fd_intern (evpipe [1]);
1017	ev_io_set (&pipeev, evpipe [0], EV_READ);	1083	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1018	}	1084	}
1019		1085
1020	ev_io_start (EV_A_ &pipeev);	1086	ev_io_start (EV_A_ &pipe_w);
1021	ev_unref (EV_A); /* watcher should not keep loop alive */	1087	ev_unref (EV_A); /* watcher should not keep loop alive */
1022	}	1088	}
1023	}	1089	}
1024		1090
1025	void inline_size	1091	inline_size void
1026	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1092	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1027	{	1093	{
1028	if (!*flag)	1094	if (!*flag)
1029	{	1095	{
1030	int old_errno = errno; /* save errno because write might clobber it */	1096	int old_errno = errno; /* save errno because write might clobber it */
…		…
1043		1109
1044	errno = old_errno;	1110	errno = old_errno;
1045	}	1111	}
1046	}	1112	}
1047		1113
		1114	/* called whenever the libev signal pipe */
		1115	/* got some events (signal, async) */
1048	static void	1116	static void
1049	pipecb (EV_P_ ev_io *iow, int revents)	1117	pipecb (EV_P_ ev_io *iow, int revents)
1050	{	1118	{
1051	#if EV_USE_EVENTFD	1119	#if EV_USE_EVENTFD
1052	if (evfd >= 0)	1120	if (evfd >= 0)
…		…
1108	ev_feed_signal_event (EV_P_ int signum)	1176	ev_feed_signal_event (EV_P_ int signum)
1109	{	1177	{
1110	WL w;	1178	WL w;
1111		1179
1112	#if EV_MULTIPLICITY	1180	#if EV_MULTIPLICITY
1113	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));
1114	#endif	1182	#endif
1115		1183
1116	--signum;	1184	--signum;
1117		1185
1118	if (signum < 0 || signum >= signalmax)	1186	if (signum < 0 || signum >= signalmax)
…		…
1134		1202
1135	#ifndef WIFCONTINUED	1203	#ifndef WIFCONTINUED
1136	# define WIFCONTINUED(status) 0	1204	# define WIFCONTINUED(status) 0
1137	#endif	1205	#endif
1138		1206
1139	void inline_speed	1207	/* handle a single child status event */
		1208	inline_speed void
1140	child_reap (EV_P_ int chain, int pid, int status)	1209	child_reap (EV_P_ int chain, int pid, int status)
1141	{	1210	{
1142	ev_child *w;	1211	ev_child *w;
1143	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1212	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1144		1213
…		…
1157		1226
1158	#ifndef WCONTINUED	1227	#ifndef WCONTINUED
1159	# define WCONTINUED 0	1228	# define WCONTINUED 0
1160	#endif	1229	#endif
1161		1230
		1231	/* called on sigchld etc., calls waitpid */
1162	static void	1232	static void
1163	childcb (EV_P_ ev_signal *sw, int revents)	1233	childcb (EV_P_ ev_signal *sw, int revents)
1164	{	1234	{
1165	int pid, status;	1235	int pid, status;
1166		1236
…		…
1247	/* kqueue is borked on everything but netbsd apparently */	1317	/* kqueue is borked on everything but netbsd apparently */
1248	/* 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 */
1249	flags &= ~EVBACKEND_KQUEUE;	1319	flags &= ~EVBACKEND_KQUEUE;
1250	#endif	1320	#endif
1251	#ifdef __APPLE__	1321	#ifdef __APPLE__
1252	// flags &= ~EVBACKEND_KQUEUE; for documentation	1322	/* only select works correctly on that "unix-certified" platform */
1253	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 */
1254	#endif	1325	#endif
1255		1326
1256	return flags;	1327	return flags;
1257	}	1328	}
1258		1329
…		…
1290	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1361	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1291	{	1362	{
1292	timeout_blocktime = interval;	1363	timeout_blocktime = interval;
1293	}	1364	}
1294		1365
		1366	/* initialise a loop structure, must be zero-initialised */
1295	static void noinline	1367	static void noinline
1296	loop_init (EV_P_ unsigned int flags)	1368	loop_init (EV_P_ unsigned int flags)
1297	{	1369	{
1298	if (!backend)	1370	if (!backend)
1299	{	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
1300	#if EV_USE_MONOTONIC	1382	#if EV_USE_MONOTONIC
		1383	if (!have_monotonic)
1301	{	1384	{
1302	struct timespec ts;	1385	struct timespec ts;
		1386
1303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1387	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1304	have_monotonic = 1;	1388	have_monotonic = 1;
1305	}	1389	}
1306	#endif	1390	#endif
1307		1391
1308	ev_rt_now = ev_time ();	1392	ev_rt_now = ev_time ();
1309	mn_now = get_clock ();	1393	mn_now = get_clock ();
1310	now_floor = mn_now;	1394	now_floor = mn_now;
…		…
1347	#endif	1431	#endif
1348	#if EV_USE_SELECT	1432	#if EV_USE_SELECT
1349	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1433	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1350	#endif	1434	#endif
1351		1435
		1436	ev_prepare_init (&pending_w, pendingcb);
		1437
1352	ev_init (&pipeev, pipecb);	1438	ev_init (&pipe_w, pipecb);
1353	ev_set_priority (&pipeev, EV_MAXPRI);	1439	ev_set_priority (&pipe_w, EV_MAXPRI);
1354	}	1440	}
1355	}	1441	}
1356		1442
		1443	/* free up a loop structure */
1357	static void noinline	1444	static void noinline
1358	loop_destroy (EV_P)	1445	loop_destroy (EV_P)
1359	{	1446	{
1360	int i;	1447	int i;
1361		1448
1362	if (ev_is_active (&pipeev))	1449	if (ev_is_active (&pipe_w))
1363	{	1450	{
1364	ev_ref (EV_A); /* signal watcher */	1451	ev_ref (EV_A); /* signal watcher */
1365	ev_io_stop (EV_A_ &pipeev);	1452	ev_io_stop (EV_A_ &pipe_w);
1366		1453
1367	#if EV_USE_EVENTFD	1454	#if EV_USE_EVENTFD
1368	if (evfd >= 0)	1455	if (evfd >= 0)
1369	close (evfd);	1456	close (evfd);
1370	#endif	1457	#endif
…		…
1409	}	1496	}
1410		1497
1411	ev_free (anfds); anfdmax = 0;	1498	ev_free (anfds); anfdmax = 0;
1412		1499
1413	/* 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);
1414	array_free (fdchange, EMPTY);	1502	array_free (fdchange, EMPTY);
1415	array_free (timer, EMPTY);	1503	array_free (timer, EMPTY);
1416	#if EV_PERIODIC_ENABLE	1504	#if EV_PERIODIC_ENABLE
1417	array_free (periodic, EMPTY);	1505	array_free (periodic, EMPTY);
1418	#endif	1506	#endif
…		…
1427		1515
1428	backend = 0;	1516	backend = 0;
1429	}	1517	}
1430		1518
1431	#if EV_USE_INOTIFY	1519	#if EV_USE_INOTIFY
1432	void inline_size infy_fork (EV_P);	1520	inline_size void infy_fork (EV_P);
1433	#endif	1521	#endif
1434		1522
1435	void inline_size	1523	inline_size void
1436	loop_fork (EV_P)	1524	loop_fork (EV_P)
1437	{	1525	{
1438	#if EV_USE_PORT	1526	#if EV_USE_PORT
1439	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1527	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1440	#endif	1528	#endif
…		…
1446	#endif	1534	#endif
1447	#if EV_USE_INOTIFY	1535	#if EV_USE_INOTIFY
1448	infy_fork (EV_A);	1536	infy_fork (EV_A);
1449	#endif	1537	#endif
1450		1538
1451	if (ev_is_active (&pipeev))	1539	if (ev_is_active (&pipe_w))
1452	{	1540	{
1453	/* this "locks" the handlers against writing to the pipe */	1541	/* this "locks" the handlers against writing to the pipe */
1454	/* while we modify the fd vars */	1542	/* while we modify the fd vars */
1455	gotsig = 1;	1543	gotsig = 1;
1456	#if EV_ASYNC_ENABLE	1544	#if EV_ASYNC_ENABLE
1457	gotasync = 1;	1545	gotasync = 1;
1458	#endif	1546	#endif
1459		1547
1460	ev_ref (EV_A);	1548	ev_ref (EV_A);
1461	ev_io_stop (EV_A_ &pipeev);	1549	ev_io_stop (EV_A_ &pipe_w);
1462		1550
1463	#if EV_USE_EVENTFD	1551	#if EV_USE_EVENTFD
1464	if (evfd >= 0)	1552	if (evfd >= 0)
1465	close (evfd);	1553	close (evfd);
1466	#endif	1554	#endif
…		…
1471	close (evpipe [1]);	1559	close (evpipe [1]);
1472	}	1560	}
1473		1561
1474	evpipe_init (EV_A);	1562	evpipe_init (EV_A);
1475	/* now iterate over everything, in case we missed something */	1563	/* now iterate over everything, in case we missed something */
1476	pipecb (EV_A_ &pipeev, EV_READ);	1564	pipecb (EV_A_ &pipe_w, EV_READ);
1477	}	1565	}
1478		1566
1479	postfork = 0;	1567	postfork = 0;
1480	}	1568	}
1481		1569
…		…
1508	{	1596	{
1509	postfork = 1; /* must be in line with ev_default_fork */	1597	postfork = 1; /* must be in line with ev_default_fork */
1510	}	1598	}
1511		1599
1512	#if EV_VERIFY	1600	#if EV_VERIFY
1513	void noinline	1601	static void noinline
1514	verify_watcher (EV_P_ W w)	1602	verify_watcher (EV_P_ W w)
1515	{	1603	{
1516	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1604	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1517		1605
1518	if (w->pending)	1606	if (w->pending)
1519	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));
1520	}	1608	}
1521		1609
1522	static void noinline	1610	static void noinline
1523	verify_heap (EV_P_ ANHE *heap, int N)	1611	verify_heap (EV_P_ ANHE *heap, int N)
1524	{	1612	{
1525	int i;	1613	int i;
1526		1614
1527	for (i = HEAP0; i < N + HEAP0; ++i)	1615	for (i = HEAP0; i < N + HEAP0; ++i)
1528	{	1616	{
1529	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));
1530	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])));
1531	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]))));
1532		1620
1533	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1621	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1534	}	1622	}
1535	}	1623	}
1536		1624
1537	static void noinline	1625	static void noinline
1538	array_verify (EV_P_ W *ws, int cnt)	1626	array_verify (EV_P_ W *ws, int cnt)
1539	{	1627	{
1540	while (cnt--)	1628	while (cnt--)
1541	{	1629	{
1542	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1630	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1543	verify_watcher (EV_A_ ws [cnt]);	1631	verify_watcher (EV_A_ ws [cnt]);
1544	}	1632	}
1545	}	1633	}
1546	#endif	1634	#endif
1547		1635
…		…
1554		1642
1555	assert (activecnt >= -1);	1643	assert (activecnt >= -1);
1556		1644
1557	assert (fdchangemax >= fdchangecnt);	1645	assert (fdchangemax >= fdchangecnt);
1558	for (i = 0; i < fdchangecnt; ++i)	1646	for (i = 0; i < fdchangecnt; ++i)
1559	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1647	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1560		1648
1561	assert (anfdmax >= 0);	1649	assert (anfdmax >= 0);
1562	for (i = 0; i < anfdmax; ++i)	1650	for (i = 0; i < anfdmax; ++i)
1563	for (w = anfds [i].head; w; w = w->next)	1651	for (w = anfds [i].head; w; w = w->next)
1564	{	1652	{
1565	verify_watcher (EV_A_ (W)w);	1653	verify_watcher (EV_A_ (W)w);
1566	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1654	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1567	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));
1568	}	1656	}
1569		1657
1570	assert (timermax >= timercnt);	1658	assert (timermax >= timercnt);
1571	verify_heap (EV_A_ timers, timercnt);	1659	verify_heap (EV_A_ timers, timercnt);
1572		1660
…		…
1649	{	1737	{
1650	#if EV_MULTIPLICITY	1738	#if EV_MULTIPLICITY
1651	struct ev_loop *loop = ev_default_loop_ptr;	1739	struct ev_loop *loop = ev_default_loop_ptr;
1652	#endif	1740	#endif
1653		1741
		1742	ev_default_loop_ptr = 0;
		1743
1654	#ifndef _WIN32	1744	#ifndef _WIN32
1655	ev_ref (EV_A); /* child watcher */	1745	ev_ref (EV_A); /* child watcher */
1656	ev_signal_stop (EV_A_ &childev);	1746	ev_signal_stop (EV_A_ &childev);
1657	#endif	1747	#endif
1658		1748
…		…
1664	{	1754	{
1665	#if EV_MULTIPLICITY	1755	#if EV_MULTIPLICITY
1666	struct ev_loop *loop = ev_default_loop_ptr;	1756	struct ev_loop *loop = ev_default_loop_ptr;
1667	#endif	1757	#endif
1668		1758
1669	if (backend)
1670	postfork = 1; /* must be in line with ev_loop_fork */	1759	postfork = 1; /* must be in line with ev_loop_fork */
1671	}	1760	}
1672		1761
1673	/*****************************************************************************/	1762	/*****************************************************************************/
1674		1763
1675	void	1764	void
1676	ev_invoke (EV_P_ void *w, int revents)	1765	ev_invoke (EV_P_ void *w, int revents)
1677	{	1766	{
1678	EV_CB_INVOKE ((W)w, revents);	1767	EV_CB_INVOKE ((W)w, revents);
1679	}	1768	}
1680		1769
1681	void inline_speed	1770	inline_speed void
1682	call_pending (EV_P)	1771	call_pending (EV_P)
1683	{	1772	{
1684	int pri;	1773	int pri;
1685		1774
1686	for (pri = NUMPRI; pri--; )	1775	for (pri = NUMPRI; pri--; )
1687	while (pendingcnt [pri])	1776	while (pendingcnt [pri])
1688	{	1777	{
1689	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1778	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1690		1779
1691	if (expect_true (p->w))
1692	{
1693	/*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 */
1694		1782
1695	p->w->pending = 0;	1783	p->w->pending = 0;
1696	EV_CB_INVOKE (p->w, p->events);	1784	EV_CB_INVOKE (p->w, p->events);
1697	EV_FREQUENT_CHECK;	1785	EV_FREQUENT_CHECK;
1698	}
1699	}	1786	}
1700	}	1787	}
1701		1788
1702	#if EV_IDLE_ENABLE	1789	#if EV_IDLE_ENABLE
1703	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
1704	idle_reify (EV_P)	1793	idle_reify (EV_P)
1705	{	1794	{
1706	if (expect_false (idleall))	1795	if (expect_false (idleall))
1707	{	1796	{
1708	int pri;	1797	int pri;
…		…
1720	}	1809	}
1721	}	1810	}
1722	}	1811	}
1723	#endif	1812	#endif
1724		1813
1725	void inline_size	1814	/* make timers pending */
		1815	inline_size void
1726	timers_reify (EV_P)	1816	timers_reify (EV_P)
1727	{	1817	{
1728	EV_FREQUENT_CHECK;	1818	EV_FREQUENT_CHECK;
1729		1819
1730	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1820	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1731	{	1821	{
1732	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1822	do
1733
1734	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1735
1736	/* first reschedule or stop timer */
1737	if (w->repeat)
1738	{	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	{
1739	ev_at (w) += w->repeat;	1831	ev_at (w) += w->repeat;
1740	if (ev_at (w) < mn_now)	1832	if (ev_at (w) < mn_now)
1741	ev_at (w) = mn_now;	1833	ev_at (w) = mn_now;
1742		1834
1743	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.));
1744		1836
1745	ANHE_at_cache (timers [HEAP0]);	1837	ANHE_at_cache (timers [HEAP0]);
1746	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);
1747	}	1845	}
1748	else	1846	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1749	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1750		1847
1751	EV_FREQUENT_CHECK;
1752	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1848	feed_reverse_done (EV_A_ EV_TIMEOUT);
1753	}	1849	}
1754	}	1850	}
1755		1851
1756	#if EV_PERIODIC_ENABLE	1852	#if EV_PERIODIC_ENABLE
1757	void inline_size	1853	/* make periodics pending */
		1854	inline_size void
1758	periodics_reify (EV_P)	1855	periodics_reify (EV_P)
1759	{	1856	{
1760	EV_FREQUENT_CHECK;	1857	EV_FREQUENT_CHECK;
1761		1858
1762	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1859	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1763	{	1860	{
1764	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1861	int feed_count = 0;
1765		1862
1766	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1863	do
1767
1768	/* first reschedule or stop timer */
1769	if (w->reschedule_cb)
1770	{	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	{
1771	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1872	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1772		1873
1773	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));
1774		1875
1775	ANHE_at_cache (periodics [HEAP0]);	1876	ANHE_at_cache (periodics [HEAP0]);
1776	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);
1777	}	1903	}
1778	else if (w->interval)	1904	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1779	{
1780	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1781	/* if next trigger time is not sufficiently in the future, put it there */
1782	/* this might happen because of floating point inexactness */
1783	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1784	{
1785	ev_at (w) += w->interval;
1786		1905
1787	/* if interval is unreasonably low we might still have a time in the past */
1788	/* so correct this. this will make the periodic very inexact, but the user */
1789	/* has effectively asked to get triggered more often than possible */
1790	if (ev_at (w) < ev_rt_now)
1791	ev_at (w) = ev_rt_now;
1792	}
1793
1794	ANHE_at_cache (periodics [HEAP0]);
1795	downheap (periodics, periodiccnt, HEAP0);
1796	}
1797	else
1798	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1799
1800	EV_FREQUENT_CHECK;
1801	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1906	feed_reverse_done (EV_A_ EV_PERIODIC);
1802	}	1907	}
1803	}	1908	}
1804		1909
		1910	/* simply recalculate all periodics */
		1911	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1805	static void noinline	1912	static void noinline
1806	periodics_reschedule (EV_P)	1913	periodics_reschedule (EV_P)
1807	{	1914	{
1808	int i;	1915	int i;
1809		1916
…		…
1822		1929
1823	reheap (periodics, periodiccnt);	1930	reheap (periodics, periodiccnt);
1824	}	1931	}
1825	#endif	1932	#endif
1826		1933
1827	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
1828	time_update (EV_P_ ev_tstamp max_block)	1951	time_update (EV_P_ ev_tstamp max_block)
1829	{	1952	{
1830	int i;
1831
1832	#if EV_USE_MONOTONIC	1953	#if EV_USE_MONOTONIC
1833	if (expect_true (have_monotonic))	1954	if (expect_true (have_monotonic))
1834	{	1955	{
		1956	int i;
1835	ev_tstamp odiff = rtmn_diff;	1957	ev_tstamp odiff = rtmn_diff;
1836		1958
1837	mn_now = get_clock ();	1959	mn_now = get_clock ();
1838		1960
1839	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1961	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1865	ev_rt_now = ev_time ();	1987	ev_rt_now = ev_time ();
1866	mn_now = get_clock ();	1988	mn_now = get_clock ();
1867	now_floor = mn_now;	1989	now_floor = mn_now;
1868	}	1990	}
1869		1991
		1992	/* no timer adjustment, as the monotonic clock doesn't jump */
		1993	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1870	# if EV_PERIODIC_ENABLE	1994	# if EV_PERIODIC_ENABLE
1871	periodics_reschedule (EV_A);	1995	periodics_reschedule (EV_A);
1872	# endif	1996	# endif
1873	/* no timer adjustment, as the monotonic clock doesn't jump */
1874	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1875	}	1997	}
1876	else	1998	else
1877	#endif	1999	#endif
1878	{	2000	{
1879	ev_rt_now = ev_time ();	2001	ev_rt_now = ev_time ();
1880		2002
1881	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))
1882	{	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);
1883	#if EV_PERIODIC_ENABLE	2007	#if EV_PERIODIC_ENABLE
1884	periodics_reschedule (EV_A);	2008	periodics_reschedule (EV_A);
1885	#endif	2009	#endif
1886	/* adjust timers. this is easy, as the offset is the same for all of them */
1887	for (i = 0; i < timercnt; ++i)
1888	{
1889	ANHE *he = timers + i + HEAP0;
1890	ANHE_w (*he)->at += ev_rt_now - mn_now;
1891	ANHE_at_cache (*he);
1892	}
1893	}	2010	}
1894		2011
1895	mn_now = ev_rt_now;	2012	mn_now = ev_rt_now;
1896	}	2013	}
1897	}
1898
1899	void
1900	ev_ref (EV_P)
1901	{
1902	++activecnt;
1903	}
1904
1905	void
1906	ev_unref (EV_P)
1907	{
1908	--activecnt;
1909	}	2014	}
1910		2015
1911	static int loop_done;	2016	static int loop_done;
1912		2017
1913	void	2018	void
…		…
1947	{	2052	{
1948	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2053	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1949	call_pending (EV_A);	2054	call_pending (EV_A);
1950	}	2055	}
1951		2056
1952	if (expect_false (!activecnt))
1953	break;
1954
1955	/* we might have forked, so reify kernel state if necessary */	2057	/* we might have forked, so reify kernel state if necessary */
1956	if (expect_false (postfork))	2058	if (expect_false (postfork))
1957	loop_fork (EV_A);	2059	loop_fork (EV_A);
1958		2060
1959	/* update fd-related kernel structures */	2061	/* update fd-related kernel structures */
…		…
2038	ev_unloop (EV_P_ int how)	2140	ev_unloop (EV_P_ int how)
2039	{	2141	{
2040	loop_done = how;	2142	loop_done = how;
2041	}	2143	}
2042		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
2043	/*****************************************************************************/	2182	/*****************************************************************************/
		2183	/* singly-linked list management, used when the expected list length is short */
2044		2184
2045	void inline_size	2185	inline_size void
2046	wlist_add (WL *head, WL elem)	2186	wlist_add (WL *head, WL elem)
2047	{	2187	{
2048	elem->next = *head;	2188	elem->next = *head;
2049	*head = elem;	2189	*head = elem;
2050	}	2190	}
2051		2191
2052	void inline_size	2192	inline_size void
2053	wlist_del (WL *head, WL elem)	2193	wlist_del (WL *head, WL elem)
2054	{	2194	{
2055	while (*head)	2195	while (*head)
2056	{	2196	{
2057	if (*head == elem)	2197	if (*head == elem)
…		…
2062		2202
2063	head = &(*head)->next;	2203	head = &(*head)->next;
2064	}	2204	}
2065	}	2205	}
2066		2206
2067	void inline_speed	2207	/* internal, faster, version of ev_clear_pending */
		2208	inline_speed void
2068	clear_pending (EV_P_ W w)	2209	clear_pending (EV_P_ W w)
2069	{	2210	{
2070	if (w->pending)	2211	if (w->pending)
2071	{	2212	{
2072	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2213	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2073	w->pending = 0;	2214	w->pending = 0;
2074	}	2215	}
2075	}	2216	}
2076		2217
2077	int	2218	int
…		…
2081	int pending = w_->pending;	2222	int pending = w_->pending;
2082		2223
2083	if (expect_true (pending))	2224	if (expect_true (pending))
2084	{	2225	{
2085	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2226	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2227	p->w = (W)&pending_w;
2086	w_->pending = 0;	2228	w_->pending = 0;
2087	p->w = 0;
2088	return p->events;	2229	return p->events;
2089	}	2230	}
2090	else	2231	else
2091	return 0;	2232	return 0;
2092	}	2233	}
2093		2234
2094	void inline_size	2235	inline_size void
2095	pri_adjust (EV_P_ W w)	2236	pri_adjust (EV_P_ W w)
2096	{	2237	{
2097	int pri = w->priority;	2238	int pri = w->priority;
2098	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2239	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2099	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2240	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2100	w->priority = pri;	2241	w->priority = pri;
2101	}	2242	}
2102		2243
2103	void inline_speed	2244	inline_speed void
2104	ev_start (EV_P_ W w, int active)	2245	ev_start (EV_P_ W w, int active)
2105	{	2246	{
2106	pri_adjust (EV_A_ w);	2247	pri_adjust (EV_A_ w);
2107	w->active = active;	2248	w->active = active;
2108	ev_ref (EV_A);	2249	ev_ref (EV_A);
2109	}	2250	}
2110		2251
2111	void inline_size	2252	inline_size void
2112	ev_stop (EV_P_ W w)	2253	ev_stop (EV_P_ W w)
2113	{	2254	{
2114	ev_unref (EV_A);	2255	ev_unref (EV_A);
2115	w->active = 0;	2256	w->active = 0;
2116	}	2257	}
…		…
2123	int fd = w->fd;	2264	int fd = w->fd;
2124		2265
2125	if (expect_false (ev_is_active (w)))	2266	if (expect_false (ev_is_active (w)))
2126	return;	2267	return;
2127		2268
2128	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))));
2129		2271
2130	EV_FREQUENT_CHECK;	2272	EV_FREQUENT_CHECK;
2131		2273
2132	ev_start (EV_A_ (W)w, 1);	2274	ev_start (EV_A_ (W)w, 1);
2133	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2275	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2134	wlist_add (&anfds[fd].head, (WL)w);	2276	wlist_add (&anfds[fd].head, (WL)w);
2135		2277
2136	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2278	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2137	w->events &= ~EV_IOFDSET;	2279	w->events &= ~EV__IOFDSET;
2138		2280
2139	EV_FREQUENT_CHECK;	2281	EV_FREQUENT_CHECK;
2140	}	2282	}
2141		2283
2142	void noinline	2284	void noinline
…		…
2144	{	2286	{
2145	clear_pending (EV_A_ (W)w);	2287	clear_pending (EV_A_ (W)w);
2146	if (expect_false (!ev_is_active (w)))	2288	if (expect_false (!ev_is_active (w)))
2147	return;	2289	return;
2148		2290
2149	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));
2150		2292
2151	EV_FREQUENT_CHECK;	2293	EV_FREQUENT_CHECK;
2152		2294
2153	wlist_del (&anfds[w->fd].head, (WL)w);	2295	wlist_del (&anfds[w->fd].head, (WL)w);
2154	ev_stop (EV_A_ (W)w);	2296	ev_stop (EV_A_ (W)w);
…		…
2164	if (expect_false (ev_is_active (w)))	2306	if (expect_false (ev_is_active (w)))
2165	return;	2307	return;
2166		2308
2167	ev_at (w) += mn_now;	2309	ev_at (w) += mn_now;
2168		2310
2169	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.));
2170		2312
2171	EV_FREQUENT_CHECK;	2313	EV_FREQUENT_CHECK;
2172		2314
2173	++timercnt;	2315	++timercnt;
2174	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2316	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2177	ANHE_at_cache (timers [ev_active (w)]);	2319	ANHE_at_cache (timers [ev_active (w)]);
2178	upheap (timers, ev_active (w));	2320	upheap (timers, ev_active (w));
2179		2321
2180	EV_FREQUENT_CHECK;	2322	EV_FREQUENT_CHECK;
2181		2323
2182	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2324	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2183	}	2325	}
2184		2326
2185	void noinline	2327	void noinline
2186	ev_timer_stop (EV_P_ ev_timer *w)	2328	ev_timer_stop (EV_P_ ev_timer *w)
2187	{	2329	{
…		…
2192	EV_FREQUENT_CHECK;	2334	EV_FREQUENT_CHECK;
2193		2335
2194	{	2336	{
2195	int active = ev_active (w);	2337	int active = ev_active (w);
2196		2338
2197	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2339	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2198		2340
2199	--timercnt;	2341	--timercnt;
2200		2342
2201	if (expect_true (active < timercnt + HEAP0))	2343	if (expect_true (active < timercnt + HEAP0))
2202	{	2344	{
…		…
2246		2388
2247	if (w->reschedule_cb)	2389	if (w->reschedule_cb)
2248	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2390	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2249	else if (w->interval)	2391	else if (w->interval)
2250	{	2392	{
2251	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.));
2252	/* 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 */
2253	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;
2254	}	2396	}
2255	else	2397	else
2256	ev_at (w) = w->offset;	2398	ev_at (w) = w->offset;
…		…
2264	ANHE_at_cache (periodics [ev_active (w)]);	2406	ANHE_at_cache (periodics [ev_active (w)]);
2265	upheap (periodics, ev_active (w));	2407	upheap (periodics, ev_active (w));
2266		2408
2267	EV_FREQUENT_CHECK;	2409	EV_FREQUENT_CHECK;
2268		2410
2269	/*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));*/
2270	}	2412	}
2271		2413
2272	void noinline	2414	void noinline
2273	ev_periodic_stop (EV_P_ ev_periodic *w)	2415	ev_periodic_stop (EV_P_ ev_periodic *w)
2274	{	2416	{
…		…
2279	EV_FREQUENT_CHECK;	2421	EV_FREQUENT_CHECK;
2280		2422
2281	{	2423	{
2282	int active = ev_active (w);	2424	int active = ev_active (w);
2283		2425
2284	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2426	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2285		2427
2286	--periodiccnt;	2428	--periodiccnt;
2287		2429
2288	if (expect_true (active < periodiccnt + HEAP0))	2430	if (expect_true (active < periodiccnt + HEAP0))
2289	{	2431	{
…		…
2312		2454
2313	void noinline	2455	void noinline
2314	ev_signal_start (EV_P_ ev_signal *w)	2456	ev_signal_start (EV_P_ ev_signal *w)
2315	{	2457	{
2316	#if EV_MULTIPLICITY	2458	#if EV_MULTIPLICITY
2317	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));
2318	#endif	2460	#endif
2319	if (expect_false (ev_is_active (w)))	2461	if (expect_false (ev_is_active (w)))
2320	return;	2462	return;
2321		2463
2322	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));
2323		2465
2324	evpipe_init (EV_A);	2466	evpipe_init (EV_A);
2325		2467
2326	EV_FREQUENT_CHECK;	2468	EV_FREQUENT_CHECK;
2327		2469
…		…
2330	sigset_t full, prev;	2472	sigset_t full, prev;
2331	sigfillset (&full);	2473	sigfillset (&full);
2332	sigprocmask (SIG_SETMASK, &full, &prev);	2474	sigprocmask (SIG_SETMASK, &full, &prev);
2333	#endif	2475	#endif
2334		2476
2335	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2477	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2336		2478
2337	#ifndef _WIN32	2479	#ifndef _WIN32
2338	sigprocmask (SIG_SETMASK, &prev, 0);	2480	sigprocmask (SIG_SETMASK, &prev, 0);
2339	#endif	2481	#endif
2340	}	2482	}
…		…
2378		2520
2379	void	2521	void
2380	ev_child_start (EV_P_ ev_child *w)	2522	ev_child_start (EV_P_ ev_child *w)
2381	{	2523	{
2382	#if EV_MULTIPLICITY	2524	#if EV_MULTIPLICITY
2383	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));
2384	#endif	2526	#endif
2385	if (expect_false (ev_is_active (w)))	2527	if (expect_false (ev_is_active (w)))
2386	return;	2528	return;
2387		2529
2388	EV_FREQUENT_CHECK;	2530	EV_FREQUENT_CHECK;
…		…
2413	# ifdef _WIN32	2555	# ifdef _WIN32
2414	# undef lstat	2556	# undef lstat
2415	# define lstat(a,b) _stati64 (a,b)	2557	# define lstat(a,b) _stati64 (a,b)
2416	# endif	2558	# endif
2417		2559
2418	#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 */
2419	#define MIN_STAT_INTERVAL 0.1074891	2562	#define MIN_STAT_INTERVAL 0.1074891
2420		2563
2421	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);
2422		2565
2423	#if EV_USE_INOTIFY	2566	#if EV_USE_INOTIFY
2424	# define EV_INOTIFY_BUFSIZE 8192	2567	# define EV_INOTIFY_BUFSIZE 8192
…		…
2428	{	2571	{
2429	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);
2430		2573
2431	if (w->wd < 0)	2574	if (w->wd < 0)
2432	{	2575	{
		2576	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2433	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 */
2434		2578
2435	/* monitor some parent directory for speedup hints */	2579	/* monitor some parent directory for speedup hints */
2436	/* note that exceeding the hardcoded limit is not a correctness issue, */	2580	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2437	/* but an efficiency issue only */	2581	/* but an efficiency issue only */
2438	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2582	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2439	{	2583	{
2440	char path [4096];	2584	char path [4096];
2441	strcpy (path, w->path);	2585	strcpy (path, w->path);
…		…
2445	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2589	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2446	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2590	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2447		2591
2448	char *pend = strrchr (path, '/');	2592	char *pend = strrchr (path, '/');
2449		2593
2450	if (!pend)	2594	if (!pend || pend == path)
2451	break; /* whoops, no '/', complain to your admin */	2595	break;
2452		2596
2453	*pend = 0;	2597	*pend = 0;
2454	w->wd = inotify_add_watch (fs_fd, path, mask);	2598	w->wd = inotify_add_watch (fs_fd, path, mask);
2455	}	2599	}
2456	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2600	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2457	}	2601	}
2458	}	2602	}
2459	else
2460	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2461		2603
2462	if (w->wd >= 0)	2604	if (w->wd >= 0)
		2605	{
2463	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	}
2464	}	2625	}
2465		2626
2466	static void noinline	2627	static void noinline
2467	infy_del (EV_P_ ev_stat *w)	2628	infy_del (EV_P_ ev_stat *w)
2468	{	2629	{
…		…
2482		2643
2483	static void noinline	2644	static void noinline
2484	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)
2485	{	2646	{
2486	if (slot < 0)	2647	if (slot < 0)
2487	/* overflow, need to check for all hahs slots */	2648	/* overflow, need to check for all hash slots */
2488	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	2649	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2489	infy_wd (EV_A_ slot, wd, ev);	2650	infy_wd (EV_A_ slot, wd, ev);
2490	else	2651	else
2491	{	2652	{
2492	WL w_;	2653	WL w_;
…		…
2498		2659
2499	if (w->wd == wd || wd == -1)	2660	if (w->wd == wd || wd == -1)
2500	{	2661	{
2501	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2662	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2502	{	2663	{
		2664	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2503	w->wd = -1;	2665	w->wd = -1;
2504	infy_add (EV_A_ w); /* re-add, no matter what */	2666	infy_add (EV_A_ w); /* re-add, no matter what */
2505	}	2667	}
2506		2668
2507	stat_timer_cb (EV_A_ &w->timer, 0);	2669	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2520		2682
2521	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)
2522	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2684	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2523	}	2685	}
2524		2686
2525	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
2526	infy_init (EV_P)	2711	infy_init (EV_P)
2527	{	2712	{
2528	if (fs_fd != -2)	2713	if (fs_fd != -2)
2529	return;	2714	return;
		2715
		2716	fs_fd = -1;
		2717
		2718	check_2625 (EV_A);
2530		2719
2531	fs_fd = inotify_init ();	2720	fs_fd = inotify_init ();
2532		2721
2533	if (fs_fd >= 0)	2722	if (fs_fd >= 0)
2534	{	2723	{
…		…
2536	ev_set_priority (&fs_w, EV_MAXPRI);	2725	ev_set_priority (&fs_w, EV_MAXPRI);
2537	ev_io_start (EV_A_ &fs_w);	2726	ev_io_start (EV_A_ &fs_w);
2538	}	2727	}
2539	}	2728	}
2540		2729
2541	void inline_size	2730	inline_size void
2542	infy_fork (EV_P)	2731	infy_fork (EV_P)
2543	{	2732	{
2544	int slot;	2733	int slot;
2545		2734
2546	if (fs_fd < 0)	2735	if (fs_fd < 0)
…		…
2562	w->wd = -1;	2751	w->wd = -1;
2563		2752
2564	if (fs_fd >= 0)	2753	if (fs_fd >= 0)
2565	infy_add (EV_A_ w); /* re-add, no matter what */	2754	infy_add (EV_A_ w); /* re-add, no matter what */
2566	else	2755	else
2567	ev_timer_start (EV_A_ &w->timer);	2756	ev_timer_again (EV_A_ &w->timer);
2568	}	2757	}
2569
2570	}	2758	}
2571	}	2759	}
2572		2760
2573	#endif	2761	#endif
2574		2762
…		…
2610	|| w->prev.st_atime != w->attr.st_atime	2798	|| w->prev.st_atime != w->attr.st_atime
2611	|| w->prev.st_mtime != w->attr.st_mtime	2799	|| w->prev.st_mtime != w->attr.st_mtime
2612	|| w->prev.st_ctime != w->attr.st_ctime	2800	|| w->prev.st_ctime != w->attr.st_ctime
2613	) {	2801	) {
2614	#if EV_USE_INOTIFY	2802	#if EV_USE_INOTIFY
		2803	if (fs_fd >= 0)
		2804	{
2615	infy_del (EV_A_ w);	2805	infy_del (EV_A_ w);
2616	infy_add (EV_A_ w);	2806	infy_add (EV_A_ w);
2617	ev_stat_stat (EV_A_ w); /* avoid race... */	2807	ev_stat_stat (EV_A_ w); /* avoid race... */
		2808	}
2618	#endif	2809	#endif
2619		2810
2620	ev_feed_event (EV_A_ w, EV_STAT);	2811	ev_feed_event (EV_A_ w, EV_STAT);
2621	}	2812	}
2622	}	2813	}
…		…
2625	ev_stat_start (EV_P_ ev_stat *w)	2816	ev_stat_start (EV_P_ ev_stat *w)
2626	{	2817	{
2627	if (expect_false (ev_is_active (w)))	2818	if (expect_false (ev_is_active (w)))
2628	return;	2819	return;
2629		2820
2630	/* since we use memcmp, we need to clear any padding data etc. */
2631	memset (&w->prev, 0, sizeof (ev_statdata));
2632	memset (&w->attr, 0, sizeof (ev_statdata));
2633
2634	ev_stat_stat (EV_A_ w);	2821	ev_stat_stat (EV_A_ w);
2635		2822
		2823	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2636	if (w->interval < MIN_STAT_INTERVAL)	2824	w->interval = MIN_STAT_INTERVAL;
2637	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2638		2825
2639	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);
2640	ev_set_priority (&w->timer, ev_priority (w));	2827	ev_set_priority (&w->timer, ev_priority (w));
2641		2828
2642	#if EV_USE_INOTIFY	2829	#if EV_USE_INOTIFY
2643	infy_init (EV_A);	2830	infy_init (EV_A);
2644		2831
2645	if (fs_fd >= 0)	2832	if (fs_fd >= 0)
2646	infy_add (EV_A_ w);	2833	infy_add (EV_A_ w);
2647	else	2834	else
2648	#endif	2835	#endif
2649	ev_timer_start (EV_A_ &w->timer);	2836	ev_timer_again (EV_A_ &w->timer);
2650		2837
2651	ev_start (EV_A_ (W)w, 1);	2838	ev_start (EV_A_ (W)w, 1);
2652		2839
2653	EV_FREQUENT_CHECK;	2840	EV_FREQUENT_CHECK;
2654	}	2841	}
…		…
2824	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3011	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2825	}	3012	}
2826	}	3013	}
2827	}	3014	}
2828		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
2829	#if 0	3033	#if 0
2830	static void	3034	static void
2831	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3035	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2832	{	3036	{
2833	ev_idle_stop (EV_A_ idle);	3037	ev_idle_stop (EV_A_ idle);
…		…
2840	if (expect_false (ev_is_active (w)))	3044	if (expect_false (ev_is_active (w)))
2841	return;	3045	return;
2842		3046
2843	{	3047	{
2844	struct ev_loop *loop = w->other;	3048	struct ev_loop *loop = w->other;
2845	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 ()));
2846	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);
2847	}	3051	}
2848		3052
2849	EV_FREQUENT_CHECK;	3053	EV_FREQUENT_CHECK;
2850		3054
…		…
2853		3057
2854	ev_prepare_init (&w->prepare, embed_prepare_cb);	3058	ev_prepare_init (&w->prepare, embed_prepare_cb);
2855	ev_set_priority (&w->prepare, EV_MINPRI);	3059	ev_set_priority (&w->prepare, EV_MINPRI);
2856	ev_prepare_start (EV_A_ &w->prepare);	3060	ev_prepare_start (EV_A_ &w->prepare);
2857		3061
		3062	ev_fork_init (&w->fork, embed_fork_cb);
		3063	ev_fork_start (EV_A_ &w->fork);
		3064
2858	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/	3065	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2859		3066
2860	ev_start (EV_A_ (W)w, 1);	3067	ev_start (EV_A_ (W)w, 1);
2861		3068
2862	EV_FREQUENT_CHECK;	3069	EV_FREQUENT_CHECK;
…		…
2869	if (expect_false (!ev_is_active (w)))	3076	if (expect_false (!ev_is_active (w)))
2870	return;	3077	return;
2871		3078
2872	EV_FREQUENT_CHECK;	3079	EV_FREQUENT_CHECK;
2873		3080
2874	ev_io_stop (EV_A_ &w->io);	3081	ev_io_stop (EV_A_ &w->io);
2875	ev_prepare_stop (EV_A_ &w->prepare);	3082	ev_prepare_stop (EV_A_ &w->prepare);
2876		3083	ev_fork_stop (EV_A_ &w->fork);
2877	ev_stop (EV_A_ (W)w);
2878		3084
2879	EV_FREQUENT_CHECK;	3085	EV_FREQUENT_CHECK;
2880	}	3086	}
2881	#endif	3087	#endif
2882		3088
…		…
2979	once_cb (EV_P_ struct ev_once *once, int revents)	3185	once_cb (EV_P_ struct ev_once *once, int revents)
2980	{	3186	{
2981	void (*cb)(int revents, void *arg) = once->cb;	3187	void (*cb)(int revents, void *arg) = once->cb;
2982	void *arg = once->arg;	3188	void *arg = once->arg;
2983		3189
2984	ev_io_stop (EV_A_ &once->io);	3190	ev_io_stop (EV_A_ &once->io);
2985	ev_timer_stop (EV_A_ &once->to);	3191	ev_timer_stop (EV_A_ &once->to);
2986	ev_free (once);	3192	ev_free (once);
2987		3193
2988	cb (revents, arg);	3194	cb (revents, arg);
2989	}	3195	}
2990		3196
2991	static void	3197	static void
2992	once_cb_io (EV_P_ ev_io *w, int revents)	3198	once_cb_io (EV_P_ ev_io *w, int revents)
2993	{	3199	{
2994	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));
2995	}	3203	}
2996		3204
2997	static void	3205	static void
2998	once_cb_to (EV_P_ ev_timer *w, int revents)	3206	once_cb_to (EV_P_ ev_timer *w, int revents)
2999	{	3207	{
3000	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));
3001	}	3211	}
3002		3212
3003	void	3213	void
3004	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)
3005	{	3215	{
…		…
3027	ev_timer_set (&once->to, timeout, 0.);	3237	ev_timer_set (&once->to, timeout, 0.);
3028	ev_timer_start (EV_A_ &once->to);	3238	ev_timer_start (EV_A_ &once->to);
3029	}	3239	}
3030	}	3240	}
3031		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
3032	#if EV_MULTIPLICITY	3350	#if EV_MULTIPLICITY
3033	#include "ev_wrap.h"	3351	#include "ev_wrap.h"
3034	#endif	3352	#endif
3035		3353
3036	#ifdef __cplusplus	3354	#ifdef __cplusplus

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