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Comparing libev/ev.c (file contents):
Revision 1.268 by root, Mon Oct 27 13:39:18 2008 UTC vs.
Revision 1.296 by root, Thu Jul 9 09:11:20 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	# elif !defined(EV_USE_CLOCK_SYSCALL)
		63	# define EV_USE_CLOCK_SYSCALL 0
		64	# endif
		65
52	# if HAVE_CLOCK_GETTIME	66	# if HAVE_CLOCK_GETTIME
53	# ifndef EV_USE_MONOTONIC	67	# ifndef EV_USE_MONOTONIC
54	# define EV_USE_MONOTONIC 1	68	# define EV_USE_MONOTONIC 1
55	# endif	69	# endif
56	# ifndef EV_USE_REALTIME	70	# ifndef EV_USE_REALTIME
57	# define EV_USE_REALTIME 1	71	# define EV_USE_REALTIME 0
58	# endif	72	# endif
59	# else	73	# else
60	# ifndef EV_USE_MONOTONIC	74	# ifndef EV_USE_MONOTONIC
61	# define EV_USE_MONOTONIC 0	75	# define EV_USE_MONOTONIC 0
62	# endif	76	# endif
…		…
164	# endif	178	# endif
165	#endif	179	#endif
166		180
167	/* this block tries to deduce configuration from header-defined symbols and defaults */	181	/* this block tries to deduce configuration from header-defined symbols and defaults */
168		182
		183	#ifndef EV_USE_CLOCK_SYSCALL
		184	# if __linux && __GLIBC__ >= 2
		185	# define EV_USE_CLOCK_SYSCALL 1
		186	# else
		187	# define EV_USE_CLOCK_SYSCALL 0
		188	# endif
		189	#endif
		190
169	#ifndef EV_USE_MONOTONIC	191	#ifndef EV_USE_MONOTONIC
170	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0	192	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171	# define EV_USE_MONOTONIC 1	193	# define EV_USE_MONOTONIC 1
172	# else	194	# else
173	# define EV_USE_MONOTONIC 0	195	# define EV_USE_MONOTONIC 0
174	# endif	196	# endif
175	#endif	197	#endif
176		198
177	#ifndef EV_USE_REALTIME	199	#ifndef EV_USE_REALTIME
178	# define EV_USE_REALTIME 0	200	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
179	#endif	201	#endif
180		202
181	#ifndef EV_USE_NANOSLEEP	203	#ifndef EV_USE_NANOSLEEP
182	# if _POSIX_C_SOURCE >= 199309L	204	# if _POSIX_C_SOURCE >= 199309L
183	# define EV_USE_NANOSLEEP 1	205	# define EV_USE_NANOSLEEP 1
…		…
262		284
263	#ifndef EV_HEAP_CACHE_AT	285	#ifndef EV_HEAP_CACHE_AT
264	# define EV_HEAP_CACHE_AT !EV_MINIMAL	286	# define EV_HEAP_CACHE_AT !EV_MINIMAL
265	#endif	287	#endif
266		288
		289	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		290	/* which makes programs even slower. might work on other unices, too. */
		291	#if EV_USE_CLOCK_SYSCALL
		292	# include <syscall.h>
		293	# ifdef SYS_clock_gettime
		294	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		295	# undef EV_USE_MONOTONIC
		296	# define EV_USE_MONOTONIC 1
		297	# else
		298	# undef EV_USE_CLOCK_SYSCALL
		299	# define EV_USE_CLOCK_SYSCALL 0
		300	# endif
		301	#endif
		302
267	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	303	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
268		304
269	#ifndef CLOCK_MONOTONIC	305	#ifndef CLOCK_MONOTONIC
270	# undef EV_USE_MONOTONIC	306	# undef EV_USE_MONOTONIC
271	# define EV_USE_MONOTONIC 0	307	# define EV_USE_MONOTONIC 0
…		…
287	# endif	323	# endif
288	#endif	324	#endif
289		325
290	#if EV_USE_INOTIFY	326	#if EV_USE_INOTIFY
291	# include <sys/utsname.h>	327	# include <sys/utsname.h>
		328	# include <sys/statfs.h>
292	# include <sys/inotify.h>	329	# include <sys/inotify.h>
293	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */	330	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294	# ifndef IN_DONT_FOLLOW	331	# ifndef IN_DONT_FOLLOW
295	# undef EV_USE_INOTIFY	332	# undef EV_USE_INOTIFY
296	# define EV_USE_INOTIFY 0	333	# define EV_USE_INOTIFY 0
…		…
354	# define inline_speed static noinline	391	# define inline_speed static noinline
355	#else	392	#else
356	# define inline_speed static inline	393	# define inline_speed static inline
357	#endif	394	#endif
358		395
359	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	396	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		397
		398	#if EV_MINPRI == EV_MAXPRI
		399	# define ABSPRI(w) (((W)w), 0)
		400	#else
360	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	401	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		402	#endif
361		403
362	#define EMPTY /* required for microsofts broken pseudo-c compiler */	404	#define EMPTY /* required for microsofts broken pseudo-c compiler */
363	#define EMPTY2(a,b) /* used to suppress some warnings */	405	#define EMPTY2(a,b) /* used to suppress some warnings */
364		406
365	typedef ev_watcher *W;	407	typedef ev_watcher *W;
…		…
367	typedef ev_watcher_time *WT;	409	typedef ev_watcher_time *WT;
368		410
369	#define ev_active(w) ((W)(w))->active	411	#define ev_active(w) ((W)(w))->active
370	#define ev_at(w) ((WT)(w))->at	412	#define ev_at(w) ((WT)(w))->at
371		413
372	#if EV_USE_MONOTONIC	414	#if EV_USE_REALTIME
373	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	415	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
374	/* giving it a reasonably high chance of working on typical architetcures */	416	/* giving it a reasonably high chance of working on typical architetcures */
		417	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		418	#endif
		419
		420	#if EV_USE_MONOTONIC
375	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	421	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376	#endif	422	#endif
377		423
378	#ifdef _WIN32	424	#ifdef _WIN32
379	# include "ev_win32.c"	425	# include "ev_win32.c"
…		…
388	{	434	{
389	syserr_cb = cb;	435	syserr_cb = cb;
390	}	436	}
391		437
392	static void noinline	438	static void noinline
393	syserr (const char *msg)	439	ev_syserr (const char *msg)
394	{	440	{
395	if (!msg)	441	if (!msg)
396	msg = "(libev) system error";	442	msg = "(libev) system error";
397		443
398	if (syserr_cb)	444	if (syserr_cb)
…		…
444	#define ev_malloc(size) ev_realloc (0, (size))	490	#define ev_malloc(size) ev_realloc (0, (size))
445	#define ev_free(ptr) ev_realloc ((ptr), 0)	491	#define ev_free(ptr) ev_realloc ((ptr), 0)
446		492
447	/*****************************************************************************/	493	/*****************************************************************************/
448		494
		495	/* file descriptor info structure */
449	typedef struct	496	typedef struct
450	{	497	{
451	WL head;	498	WL head;
452	unsigned char events;	499	unsigned char events; /* the events watched for */
453	unsigned char reify;	500	unsigned char reify; /* flag set when this ANFD needs reification */
454	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	501	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
		502	unsigned char unused;
		503	#if EV_USE_EPOLL
455	unsigned char egen; /* generation counter to counter epoll bugs */	504	unsigned int egen; /* generation counter to counter epoll bugs */
		505	#endif
456	#if EV_SELECT_IS_WINSOCKET	506	#if EV_SELECT_IS_WINSOCKET
457	SOCKET handle;	507	SOCKET handle;
458	#endif	508	#endif
459	} ANFD;	509	} ANFD;
460		510
		511	/* stores the pending event set for a given watcher */
461	typedef struct	512	typedef struct
462	{	513	{
463	W w;	514	W w;
464	int events;	515	int events; /* the pending event set for the given watcher */
465	} ANPENDING;	516	} ANPENDING;
466		517
467	#if EV_USE_INOTIFY	518	#if EV_USE_INOTIFY
468	/* hash table entry per inotify-id */	519	/* hash table entry per inotify-id */
469	typedef struct	520	typedef struct
…		…
472	} ANFS;	523	} ANFS;
473	#endif	524	#endif
474		525
475	/* Heap Entry */	526	/* Heap Entry */
476	#if EV_HEAP_CACHE_AT	527	#if EV_HEAP_CACHE_AT
		528	/* a heap element */
477	typedef struct {	529	typedef struct {
478	ev_tstamp at;	530	ev_tstamp at;
479	WT w;	531	WT w;
480	} ANHE;	532	} ANHE;
481		533
482	#define ANHE_w(he) (he).w /* access watcher, read-write */	534	#define ANHE_w(he) (he).w /* access watcher, read-write */
483	#define ANHE_at(he) (he).at /* access cached at, read-only */	535	#define ANHE_at(he) (he).at /* access cached at, read-only */
484	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */	536	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
485	#else	537	#else
		538	/* a heap element */
486	typedef WT ANHE;	539	typedef WT ANHE;
487		540
488	#define ANHE_w(he) (he)	541	#define ANHE_w(he) (he)
489	#define ANHE_at(he) (he)->at	542	#define ANHE_at(he) (he)->at
490	#define ANHE_at_cache(he)	543	#define ANHE_at_cache(he)
…		…
516		569
517	#endif	570	#endif
518		571
519	/*****************************************************************************/	572	/*****************************************************************************/
520		573
		574	#ifndef EV_HAVE_EV_TIME
521	ev_tstamp	575	ev_tstamp
522	ev_time (void)	576	ev_time (void)
523	{	577	{
524	#if EV_USE_REALTIME	578	#if EV_USE_REALTIME
		579	if (expect_true (have_realtime))
		580	{
525	struct timespec ts;	581	struct timespec ts;
526	clock_gettime (CLOCK_REALTIME, &ts);	582	clock_gettime (CLOCK_REALTIME, &ts);
527	return ts.tv_sec + ts.tv_nsec * 1e-9;	583	return ts.tv_sec + ts.tv_nsec * 1e-9;
528	#else	584	}
		585	#endif
		586
529	struct timeval tv;	587	struct timeval tv;
530	gettimeofday (&tv, 0);	588	gettimeofday (&tv, 0);
531	return tv.tv_sec + tv.tv_usec * 1e-6;	589	return tv.tv_sec + tv.tv_usec * 1e-6;
532	#endif
533	}	590	}
		591	#endif
534		592
535	ev_tstamp inline_size	593	inline_size ev_tstamp
536	get_clock (void)	594	get_clock (void)
537	{	595	{
538	#if EV_USE_MONOTONIC	596	#if EV_USE_MONOTONIC
539	if (expect_true (have_monotonic))	597	if (expect_true (have_monotonic))
540	{	598	{
…		…
574		632
575	tv.tv_sec = (time_t)delay;	633	tv.tv_sec = (time_t)delay;
576	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	634	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577		635
578	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	636	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
579	/* somehting nto guaranteed by newer posix versions, but guaranteed */	637	/* somehting not guaranteed by newer posix versions, but guaranteed */
580	/* by older ones */	638	/* by older ones */
581	select (0, 0, 0, 0, &tv);	639	select (0, 0, 0, 0, &tv);
582	#endif	640	#endif
583	}	641	}
584	}	642	}
585		643
586	/*****************************************************************************/	644	/*****************************************************************************/
587		645
588	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	646	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
589		647
590	int inline_size	648	/* find a suitable new size for the given array, */
		649	/* hopefully by rounding to a ncie-to-malloc size */
		650	inline_size int
591	array_nextsize (int elem, int cur, int cnt)	651	array_nextsize (int elem, int cur, int cnt)
592	{	652	{
593	int ncur = cur + 1;	653	int ncur = cur + 1;
594		654
595	do	655	do
…		…
636	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	696	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
637	}	697	}
638	#endif	698	#endif
639		699
640	#define array_free(stem, idx) \	700	#define array_free(stem, idx) \
641	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	701	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
642		702
643	/*****************************************************************************/	703	/*****************************************************************************/
		704
		705	/* dummy callback for pending events */
		706	static void noinline
		707	pendingcb (EV_P_ ev_prepare *w, int revents)
		708	{
		709	}
644		710
645	void noinline	711	void noinline
646	ev_feed_event (EV_P_ void *w, int revents)	712	ev_feed_event (EV_P_ void *w, int revents)
647	{	713	{
648	W w_ = (W)w;	714	W w_ = (W)w;
…		…
657	pendings [pri][w_->pending - 1].w = w_;	723	pendings [pri][w_->pending - 1].w = w_;
658	pendings [pri][w_->pending - 1].events = revents;	724	pendings [pri][w_->pending - 1].events = revents;
659	}	725	}
660	}	726	}
661		727
662	void inline_speed	728	inline_speed void
		729	feed_reverse (EV_P_ W w)
		730	{
		731	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		732	rfeeds [rfeedcnt++] = w;
		733	}
		734
		735	inline_size void
		736	feed_reverse_done (EV_P_ int revents)
		737	{
		738	do
		739	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		740	while (rfeedcnt);
		741	}
		742
		743	inline_speed void
663	queue_events (EV_P_ W *events, int eventcnt, int type)	744	queue_events (EV_P_ W *events, int eventcnt, int type)
664	{	745	{
665	int i;	746	int i;
666		747
667	for (i = 0; i < eventcnt; ++i)	748	for (i = 0; i < eventcnt; ++i)
668	ev_feed_event (EV_A_ events [i], type);	749	ev_feed_event (EV_A_ events [i], type);
669	}	750	}
670		751
671	/*****************************************************************************/	752	/*****************************************************************************/
672		753
673	void inline_speed	754	inline_speed void
674	fd_event (EV_P_ int fd, int revents)	755	fd_event (EV_P_ int fd, int revents)
675	{	756	{
676	ANFD *anfd = anfds + fd;	757	ANFD *anfd = anfds + fd;
677	ev_io *w;	758	ev_io *w;
678		759
…		…
690	{	771	{
691	if (fd >= 0 && fd < anfdmax)	772	if (fd >= 0 && fd < anfdmax)
692	fd_event (EV_A_ fd, revents);	773	fd_event (EV_A_ fd, revents);
693	}	774	}
694		775
695	void inline_size	776	/* make sure the external fd watch events are in-sync */
		777	/* with the kernel/libev internal state */
		778	inline_size void
696	fd_reify (EV_P)	779	fd_reify (EV_P)
697	{	780	{
698	int i;	781	int i;
699		782
700	for (i = 0; i < fdchangecnt; ++i)	783	for (i = 0; i < fdchangecnt; ++i)
…		…
715	#ifdef EV_FD_TO_WIN32_HANDLE	798	#ifdef EV_FD_TO_WIN32_HANDLE
716	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	799	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717	#else	800	#else
718	anfd->handle = _get_osfhandle (fd);	801	anfd->handle = _get_osfhandle (fd);
719	#endif	802	#endif
720	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	803	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
721	}	804	}
722	#endif	805	#endif
723		806
724	{	807	{
725	unsigned char o_events = anfd->events;	808	unsigned char o_events = anfd->events;
726	unsigned char o_reify = anfd->reify;	809	unsigned char o_reify = anfd->reify;
727		810
728	anfd->reify = 0;	811	anfd->reify = 0;
729	anfd->events = events;	812	anfd->events = events;
730		813
731	if (o_events != events || o_reify & EV_IOFDSET)	814	if (o_events != events || o_reify & EV__IOFDSET)
732	backend_modify (EV_A_ fd, o_events, events);	815	backend_modify (EV_A_ fd, o_events, events);
733	}	816	}
734	}	817	}
735		818
736	fdchangecnt = 0;	819	fdchangecnt = 0;
737	}	820	}
738		821
739	void inline_size	822	/* something about the given fd changed */
		823	inline_size void
740	fd_change (EV_P_ int fd, int flags)	824	fd_change (EV_P_ int fd, int flags)
741	{	825	{
742	unsigned char reify = anfds [fd].reify;	826	unsigned char reify = anfds [fd].reify;
743	anfds [fd].reify |= flags;	827	anfds [fd].reify |= flags;
744		828
…		…
748	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	832	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
749	fdchanges [fdchangecnt - 1] = fd;	833	fdchanges [fdchangecnt - 1] = fd;
750	}	834	}
751	}	835	}
752		836
753	void inline_speed	837	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		838	inline_speed void
754	fd_kill (EV_P_ int fd)	839	fd_kill (EV_P_ int fd)
755	{	840	{
756	ev_io *w;	841	ev_io *w;
757		842
758	while ((w = (ev_io *)anfds [fd].head))	843	while ((w = (ev_io *)anfds [fd].head))
…		…
760	ev_io_stop (EV_A_ w);	845	ev_io_stop (EV_A_ w);
761	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	846	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
762	}	847	}
763	}	848	}
764		849
765	int inline_size	850	/* check whether the given fd is atcually valid, for error recovery */
		851	inline_size int
766	fd_valid (int fd)	852	fd_valid (int fd)
767	{	853	{
768	#ifdef _WIN32	854	#ifdef _WIN32
769	return _get_osfhandle (fd) != -1;	855	return _get_osfhandle (fd) != -1;
770	#else	856	#else
…		…
807	for (fd = 0; fd < anfdmax; ++fd)	893	for (fd = 0; fd < anfdmax; ++fd)
808	if (anfds [fd].events)	894	if (anfds [fd].events)
809	{	895	{
810	anfds [fd].events = 0;	896	anfds [fd].events = 0;
811	anfds [fd].emask = 0;	897	anfds [fd].emask = 0;
812	fd_change (EV_A_ fd, EV_IOFDSET | 1);	898	fd_change (EV_A_ fd, EV__IOFDSET | 1);
813	}	899	}
814	}	900	}
815		901
816	/*****************************************************************************/	902	/*****************************************************************************/
817		903
…		…
833	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	919	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
834	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	920	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
835	#define UPHEAP_DONE(p,k) ((p) == (k))	921	#define UPHEAP_DONE(p,k) ((p) == (k))
836		922
837	/* away from the root */	923	/* away from the root */
838	void inline_speed	924	inline_speed void
839	downheap (ANHE *heap, int N, int k)	925	downheap (ANHE *heap, int N, int k)
840	{	926	{
841	ANHE he = heap [k];	927	ANHE he = heap [k];
842	ANHE *E = heap + N + HEAP0;	928	ANHE *E = heap + N + HEAP0;
843		929
…		…
883	#define HEAP0 1	969	#define HEAP0 1
884	#define HPARENT(k) ((k) >> 1)	970	#define HPARENT(k) ((k) >> 1)
885	#define UPHEAP_DONE(p,k) (!(p))	971	#define UPHEAP_DONE(p,k) (!(p))
886		972
887	/* away from the root */	973	/* away from the root */
888	void inline_speed	974	inline_speed void
889	downheap (ANHE *heap, int N, int k)	975	downheap (ANHE *heap, int N, int k)
890	{	976	{
891	ANHE he = heap [k];	977	ANHE he = heap [k];
892		978
893	for (;;)	979	for (;;)
…		…
913	ev_active (ANHE_w (he)) = k;	999	ev_active (ANHE_w (he)) = k;
914	}	1000	}
915	#endif	1001	#endif
916		1002
917	/* towards the root */	1003	/* towards the root */
918	void inline_speed	1004	inline_speed void
919	upheap (ANHE *heap, int k)	1005	upheap (ANHE *heap, int k)
920	{	1006	{
921	ANHE he = heap [k];	1007	ANHE he = heap [k];
922		1008
923	for (;;)	1009	for (;;)
…		…
934		1020
935	heap [k] = he;	1021	heap [k] = he;
936	ev_active (ANHE_w (he)) = k;	1022	ev_active (ANHE_w (he)) = k;
937	}	1023	}
938		1024
939	void inline_size	1025	/* move an element suitably so it is in a correct place */
		1026	inline_size void
940	adjustheap (ANHE *heap, int N, int k)	1027	adjustheap (ANHE *heap, int N, int k)
941	{	1028	{
942	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1029	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
943	upheap (heap, k);	1030	upheap (heap, k);
944	else	1031	else
945	downheap (heap, N, k);	1032	downheap (heap, N, k);
946	}	1033	}
947		1034
948	/* rebuild the heap: this function is used only once and executed rarely */	1035	/* rebuild the heap: this function is used only once and executed rarely */
949	void inline_size	1036	inline_size void
950	reheap (ANHE *heap, int N)	1037	reheap (ANHE *heap, int N)
951	{	1038	{
952	int i;	1039	int i;
953		1040
954	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1041	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
957	upheap (heap, i + HEAP0);	1044	upheap (heap, i + HEAP0);
958	}	1045	}
959		1046
960	/*****************************************************************************/	1047	/*****************************************************************************/
961		1048
		1049	/* associate signal watchers to a signal signal */
962	typedef struct	1050	typedef struct
963	{	1051	{
964	WL head;	1052	WL head;
965	EV_ATOMIC_T gotsig;	1053	EV_ATOMIC_T gotsig;
966	} ANSIG;	1054	} ANSIG;
…		…
970		1058
971	static EV_ATOMIC_T gotsig;	1059	static EV_ATOMIC_T gotsig;
972		1060
973	/*****************************************************************************/	1061	/*****************************************************************************/
974		1062
975	void inline_speed	1063	/* used to prepare libev internal fd's */
		1064	/* this is not fork-safe */
		1065	inline_speed void
976	fd_intern (int fd)	1066	fd_intern (int fd)
977	{	1067	{
978	#ifdef _WIN32	1068	#ifdef _WIN32
979	unsigned long arg = 1;	1069	unsigned long arg = 1;
980	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1070	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
985	}	1075	}
986		1076
987	static void noinline	1077	static void noinline
988	evpipe_init (EV_P)	1078	evpipe_init (EV_P)
989	{	1079	{
990	if (!ev_is_active (&pipeev))	1080	if (!ev_is_active (&pipe_w))
991	{	1081	{
992	#if EV_USE_EVENTFD	1082	#if EV_USE_EVENTFD
993	if ((evfd = eventfd (0, 0)) >= 0)	1083	if ((evfd = eventfd (0, 0)) >= 0)
994	{	1084	{
995	evpipe [0] = -1;	1085	evpipe [0] = -1;
996	fd_intern (evfd);	1086	fd_intern (evfd);
997	ev_io_set (&pipeev, evfd, EV_READ);	1087	ev_io_set (&pipe_w, evfd, EV_READ);
998	}	1088	}
999	else	1089	else
1000	#endif	1090	#endif
1001	{	1091	{
1002	while (pipe (evpipe))	1092	while (pipe (evpipe))
1003	syserr ("(libev) error creating signal/async pipe");	1093	ev_syserr ("(libev) error creating signal/async pipe");
1004		1094
1005	fd_intern (evpipe [0]);	1095	fd_intern (evpipe [0]);
1006	fd_intern (evpipe [1]);	1096	fd_intern (evpipe [1]);
1007	ev_io_set (&pipeev, evpipe [0], EV_READ);	1097	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1008	}	1098	}
1009		1099
1010	ev_io_start (EV_A_ &pipeev);	1100	ev_io_start (EV_A_ &pipe_w);
1011	ev_unref (EV_A); /* watcher should not keep loop alive */	1101	ev_unref (EV_A); /* watcher should not keep loop alive */
1012	}	1102	}
1013	}	1103	}
1014		1104
1015	void inline_size	1105	inline_size void
1016	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1106	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1017	{	1107	{
1018	if (!*flag)	1108	if (!*flag)
1019	{	1109	{
1020	int old_errno = errno; /* save errno because write might clobber it */	1110	int old_errno = errno; /* save errno because write might clobber it */
…		…
1033		1123
1034	errno = old_errno;	1124	errno = old_errno;
1035	}	1125	}
1036	}	1126	}
1037		1127
		1128	/* called whenever the libev signal pipe */
		1129	/* got some events (signal, async) */
1038	static void	1130	static void
1039	pipecb (EV_P_ ev_io *iow, int revents)	1131	pipecb (EV_P_ ev_io *iow, int revents)
1040	{	1132	{
1041	#if EV_USE_EVENTFD	1133	#if EV_USE_EVENTFD
1042	if (evfd >= 0)	1134	if (evfd >= 0)
…		…
1098	ev_feed_signal_event (EV_P_ int signum)	1190	ev_feed_signal_event (EV_P_ int signum)
1099	{	1191	{
1100	WL w;	1192	WL w;
1101		1193
1102	#if EV_MULTIPLICITY	1194	#if EV_MULTIPLICITY
1103	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1195	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1104	#endif	1196	#endif
1105		1197
1106	--signum;	1198	--signum;
1107		1199
1108	if (signum < 0 || signum >= signalmax)	1200	if (signum < 0 || signum >= signalmax)
…		…
1124		1216
1125	#ifndef WIFCONTINUED	1217	#ifndef WIFCONTINUED
1126	# define WIFCONTINUED(status) 0	1218	# define WIFCONTINUED(status) 0
1127	#endif	1219	#endif
1128		1220
1129	void inline_speed	1221	/* handle a single child status event */
		1222	inline_speed void
1130	child_reap (EV_P_ int chain, int pid, int status)	1223	child_reap (EV_P_ int chain, int pid, int status)
1131	{	1224	{
1132	ev_child *w;	1225	ev_child *w;
1133	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1226	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1134		1227
…		…
1147		1240
1148	#ifndef WCONTINUED	1241	#ifndef WCONTINUED
1149	# define WCONTINUED 0	1242	# define WCONTINUED 0
1150	#endif	1243	#endif
1151		1244
		1245	/* called on sigchld etc., calls waitpid */
1152	static void	1246	static void
1153	childcb (EV_P_ ev_signal *sw, int revents)	1247	childcb (EV_P_ ev_signal *sw, int revents)
1154	{	1248	{
1155	int pid, status;	1249	int pid, status;
1156		1250
…		…
1237	/* kqueue is borked on everything but netbsd apparently */	1331	/* kqueue is borked on everything but netbsd apparently */
1238	/* it usually doesn't work correctly on anything but sockets and pipes */	1332	/* it usually doesn't work correctly on anything but sockets and pipes */
1239	flags &= ~EVBACKEND_KQUEUE;	1333	flags &= ~EVBACKEND_KQUEUE;
1240	#endif	1334	#endif
1241	#ifdef __APPLE__	1335	#ifdef __APPLE__
1242	// flags &= ~EVBACKEND_KQUEUE; for documentation	1336	/* only select works correctly on that "unix-certified" platform */
1243	flags &= ~EVBACKEND_POLL;	1337	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1338	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1244	#endif	1339	#endif
1245		1340
1246	return flags;	1341	return flags;
1247	}	1342	}
1248		1343
…		…
1268	ev_loop_count (EV_P)	1363	ev_loop_count (EV_P)
1269	{	1364	{
1270	return loop_count;	1365	return loop_count;
1271	}	1366	}
1272		1367
		1368	unsigned int
		1369	ev_loop_depth (EV_P)
		1370	{
		1371	return loop_depth;
		1372	}
		1373
1273	void	1374	void
1274	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1375	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1275	{	1376	{
1276	io_blocktime = interval;	1377	io_blocktime = interval;
1277	}	1378	}
…		…
1280	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1381	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1281	{	1382	{
1282	timeout_blocktime = interval;	1383	timeout_blocktime = interval;
1283	}	1384	}
1284		1385
		1386	/* initialise a loop structure, must be zero-initialised */
1285	static void noinline	1387	static void noinline
1286	loop_init (EV_P_ unsigned int flags)	1388	loop_init (EV_P_ unsigned int flags)
1287	{	1389	{
1288	if (!backend)	1390	if (!backend)
1289	{	1391	{
		1392	#if EV_USE_REALTIME
		1393	if (!have_realtime)
		1394	{
		1395	struct timespec ts;
		1396
		1397	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1398	have_realtime = 1;
		1399	}
		1400	#endif
		1401
1290	#if EV_USE_MONOTONIC	1402	#if EV_USE_MONOTONIC
		1403	if (!have_monotonic)
1291	{	1404	{
1292	struct timespec ts;	1405	struct timespec ts;
		1406
1293	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1407	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1294	have_monotonic = 1;	1408	have_monotonic = 1;
1295	}	1409	}
1296	#endif	1410	#endif
1297		1411
1298	ev_rt_now = ev_time ();	1412	ev_rt_now = ev_time ();
1299	mn_now = get_clock ();	1413	mn_now = get_clock ();
1300	now_floor = mn_now;	1414	now_floor = mn_now;
1301	rtmn_diff = ev_rt_now - mn_now;	1415	rtmn_diff = ev_rt_now - mn_now;
		1416	invoke_cb = ev_invoke_pending;
1302		1417
1303	io_blocktime = 0.;	1418	io_blocktime = 0.;
1304	timeout_blocktime = 0.;	1419	timeout_blocktime = 0.;
1305	backend = 0;	1420	backend = 0;
1306	backend_fd = -1;	1421	backend_fd = -1;
…		…
1337	#endif	1452	#endif
1338	#if EV_USE_SELECT	1453	#if EV_USE_SELECT
1339	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1454	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1340	#endif	1455	#endif
1341		1456
		1457	ev_prepare_init (&pending_w, pendingcb);
		1458
1342	ev_init (&pipeev, pipecb);	1459	ev_init (&pipe_w, pipecb);
1343	ev_set_priority (&pipeev, EV_MAXPRI);	1460	ev_set_priority (&pipe_w, EV_MAXPRI);
1344	}	1461	}
1345	}	1462	}
1346		1463
		1464	/* free up a loop structure */
1347	static void noinline	1465	static void noinline
1348	loop_destroy (EV_P)	1466	loop_destroy (EV_P)
1349	{	1467	{
1350	int i;	1468	int i;
1351		1469
1352	if (ev_is_active (&pipeev))	1470	if (ev_is_active (&pipe_w))
1353	{	1471	{
1354	ev_ref (EV_A); /* signal watcher */	1472	ev_ref (EV_A); /* signal watcher */
1355	ev_io_stop (EV_A_ &pipeev);	1473	ev_io_stop (EV_A_ &pipe_w);
1356		1474
1357	#if EV_USE_EVENTFD	1475	#if EV_USE_EVENTFD
1358	if (evfd >= 0)	1476	if (evfd >= 0)
1359	close (evfd);	1477	close (evfd);
1360	#endif	1478	#endif
…		…
1399	}	1517	}
1400		1518
1401	ev_free (anfds); anfdmax = 0;	1519	ev_free (anfds); anfdmax = 0;
1402		1520
1403	/* have to use the microsoft-never-gets-it-right macro */	1521	/* have to use the microsoft-never-gets-it-right macro */
		1522	array_free (rfeed, EMPTY);
1404	array_free (fdchange, EMPTY);	1523	array_free (fdchange, EMPTY);
1405	array_free (timer, EMPTY);	1524	array_free (timer, EMPTY);
1406	#if EV_PERIODIC_ENABLE	1525	#if EV_PERIODIC_ENABLE
1407	array_free (periodic, EMPTY);	1526	array_free (periodic, EMPTY);
1408	#endif	1527	#endif
…		…
1417		1536
1418	backend = 0;	1537	backend = 0;
1419	}	1538	}
1420		1539
1421	#if EV_USE_INOTIFY	1540	#if EV_USE_INOTIFY
1422	void inline_size infy_fork (EV_P);	1541	inline_size void infy_fork (EV_P);
1423	#endif	1542	#endif
1424		1543
1425	void inline_size	1544	inline_size void
1426	loop_fork (EV_P)	1545	loop_fork (EV_P)
1427	{	1546	{
1428	#if EV_USE_PORT	1547	#if EV_USE_PORT
1429	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1548	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1430	#endif	1549	#endif
…		…
1436	#endif	1555	#endif
1437	#if EV_USE_INOTIFY	1556	#if EV_USE_INOTIFY
1438	infy_fork (EV_A);	1557	infy_fork (EV_A);
1439	#endif	1558	#endif
1440		1559
1441	if (ev_is_active (&pipeev))	1560	if (ev_is_active (&pipe_w))
1442	{	1561	{
1443	/* this "locks" the handlers against writing to the pipe */	1562	/* this "locks" the handlers against writing to the pipe */
1444	/* while we modify the fd vars */	1563	/* while we modify the fd vars */
1445	gotsig = 1;	1564	gotsig = 1;
1446	#if EV_ASYNC_ENABLE	1565	#if EV_ASYNC_ENABLE
1447	gotasync = 1;	1566	gotasync = 1;
1448	#endif	1567	#endif
1449		1568
1450	ev_ref (EV_A);	1569	ev_ref (EV_A);
1451	ev_io_stop (EV_A_ &pipeev);	1570	ev_io_stop (EV_A_ &pipe_w);
1452		1571
1453	#if EV_USE_EVENTFD	1572	#if EV_USE_EVENTFD
1454	if (evfd >= 0)	1573	if (evfd >= 0)
1455	close (evfd);	1574	close (evfd);
1456	#endif	1575	#endif
…		…
1461	close (evpipe [1]);	1580	close (evpipe [1]);
1462	}	1581	}
1463		1582
1464	evpipe_init (EV_A);	1583	evpipe_init (EV_A);
1465	/* now iterate over everything, in case we missed something */	1584	/* now iterate over everything, in case we missed something */
1466	pipecb (EV_A_ &pipeev, EV_READ);	1585	pipecb (EV_A_ &pipe_w, EV_READ);
1467	}	1586	}
1468		1587
1469	postfork = 0;	1588	postfork = 0;
1470	}	1589	}
1471		1590
…		…
1501		1620
1502	#if EV_VERIFY	1621	#if EV_VERIFY
1503	static void noinline	1622	static void noinline
1504	verify_watcher (EV_P_ W w)	1623	verify_watcher (EV_P_ W w)
1505	{	1624	{
1506	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1625	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1507		1626
1508	if (w->pending)	1627	if (w->pending)
1509	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	1628	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1510	}	1629	}
1511		1630
1512	static void noinline	1631	static void noinline
1513	verify_heap (EV_P_ ANHE *heap, int N)	1632	verify_heap (EV_P_ ANHE *heap, int N)
1514	{	1633	{
1515	int i;	1634	int i;
1516		1635
1517	for (i = HEAP0; i < N + HEAP0; ++i)	1636	for (i = HEAP0; i < N + HEAP0; ++i)
1518	{	1637	{
1519	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));	1638	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1520	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));	1639	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1521	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));	1640	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1522		1641
1523	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1642	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1524	}	1643	}
1525	}	1644	}
1526		1645
1527	static void noinline	1646	static void noinline
1528	array_verify (EV_P_ W *ws, int cnt)	1647	array_verify (EV_P_ W *ws, int cnt)
1529	{	1648	{
1530	while (cnt--)	1649	while (cnt--)
1531	{	1650	{
1532	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1651	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1533	verify_watcher (EV_A_ ws [cnt]);	1652	verify_watcher (EV_A_ ws [cnt]);
1534	}	1653	}
1535	}	1654	}
1536	#endif	1655	#endif
1537		1656
…		…
1544		1663
1545	assert (activecnt >= -1);	1664	assert (activecnt >= -1);
1546		1665
1547	assert (fdchangemax >= fdchangecnt);	1666	assert (fdchangemax >= fdchangecnt);
1548	for (i = 0; i < fdchangecnt; ++i)	1667	for (i = 0; i < fdchangecnt; ++i)
1549	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1668	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1550		1669
1551	assert (anfdmax >= 0);	1670	assert (anfdmax >= 0);
1552	for (i = 0; i < anfdmax; ++i)	1671	for (i = 0; i < anfdmax; ++i)
1553	for (w = anfds [i].head; w; w = w->next)	1672	for (w = anfds [i].head; w; w = w->next)
1554	{	1673	{
1555	verify_watcher (EV_A_ (W)w);	1674	verify_watcher (EV_A_ (W)w);
1556	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1675	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1557	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));	1676	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1558	}	1677	}
1559		1678
1560	assert (timermax >= timercnt);	1679	assert (timermax >= timercnt);
1561	verify_heap (EV_A_ timers, timercnt);	1680	verify_heap (EV_A_ timers, timercnt);
1562		1681
…		…
1656	{	1775	{
1657	#if EV_MULTIPLICITY	1776	#if EV_MULTIPLICITY
1658	struct ev_loop *loop = ev_default_loop_ptr;	1777	struct ev_loop *loop = ev_default_loop_ptr;
1659	#endif	1778	#endif
1660		1779
1661	if (backend)
1662	postfork = 1; /* must be in line with ev_loop_fork */	1780	postfork = 1; /* must be in line with ev_loop_fork */
1663	}	1781	}
1664		1782
1665	/*****************************************************************************/	1783	/*****************************************************************************/
1666		1784
1667	void	1785	void
1668	ev_invoke (EV_P_ void *w, int revents)	1786	ev_invoke (EV_P_ void *w, int revents)
1669	{	1787	{
1670	EV_CB_INVOKE ((W)w, revents);	1788	EV_CB_INVOKE ((W)w, revents);
1671	}	1789	}
1672		1790
1673	void inline_speed	1791	void
1674	call_pending (EV_P)	1792	ev_invoke_pending (EV_P)
1675	{	1793	{
1676	int pri;	1794	int pri;
1677		1795
1678	for (pri = NUMPRI; pri--; )	1796	for (pri = NUMPRI; pri--; )
1679	while (pendingcnt [pri])	1797	while (pendingcnt [pri])
1680	{	1798	{
1681	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1799	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1682		1800
1683	if (expect_true (p->w))
1684	{
1685	/*assert (("non-pending watcher on pending list", p->w->pending));*/	1801	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1802	/* ^ this is no longer true, as pending_w could be here */
1686		1803
1687	p->w->pending = 0;	1804	p->w->pending = 0;
1688	EV_CB_INVOKE (p->w, p->events);	1805	EV_CB_INVOKE (p->w, p->events);
1689	EV_FREQUENT_CHECK;	1806	EV_FREQUENT_CHECK;
1690	}
1691	}	1807	}
1692	}	1808	}
1693		1809
1694	#if EV_IDLE_ENABLE	1810	#if EV_IDLE_ENABLE
1695	void inline_size	1811	/* make idle watchers pending. this handles the "call-idle */
		1812	/* only when higher priorities are idle" logic */
		1813	inline_size void
1696	idle_reify (EV_P)	1814	idle_reify (EV_P)
1697	{	1815	{
1698	if (expect_false (idleall))	1816	if (expect_false (idleall))
1699	{	1817	{
1700	int pri;	1818	int pri;
…		…
1712	}	1830	}
1713	}	1831	}
1714	}	1832	}
1715	#endif	1833	#endif
1716		1834
1717	void inline_size	1835	/* make timers pending */
		1836	inline_size void
1718	timers_reify (EV_P)	1837	timers_reify (EV_P)
1719	{	1838	{
1720	EV_FREQUENT_CHECK;	1839	EV_FREQUENT_CHECK;
1721		1840
1722	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1841	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1723	{	1842	{
1724	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1843	do
1725
1726	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1727
1728	/* first reschedule or stop timer */
1729	if (w->repeat)
1730	{	1844	{
		1845	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1846
		1847	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1848
		1849	/* first reschedule or stop timer */
		1850	if (w->repeat)
		1851	{
1731	ev_at (w) += w->repeat;	1852	ev_at (w) += w->repeat;
1732	if (ev_at (w) < mn_now)	1853	if (ev_at (w) < mn_now)
1733	ev_at (w) = mn_now;	1854	ev_at (w) = mn_now;
1734		1855
1735	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1856	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1736		1857
1737	ANHE_at_cache (timers [HEAP0]);	1858	ANHE_at_cache (timers [HEAP0]);
1738	downheap (timers, timercnt, HEAP0);	1859	downheap (timers, timercnt, HEAP0);
		1860	}
		1861	else
		1862	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1863
		1864	EV_FREQUENT_CHECK;
		1865	feed_reverse (EV_A_ (W)w);
1739	}	1866	}
1740	else	1867	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1741	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1742		1868
1743	EV_FREQUENT_CHECK;
1744	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1869	feed_reverse_done (EV_A_ EV_TIMEOUT);
1745	}	1870	}
1746	}	1871	}
1747		1872
1748	#if EV_PERIODIC_ENABLE	1873	#if EV_PERIODIC_ENABLE
1749	void inline_size	1874	/* make periodics pending */
		1875	inline_size void
1750	periodics_reify (EV_P)	1876	periodics_reify (EV_P)
1751	{	1877	{
1752	EV_FREQUENT_CHECK;	1878	EV_FREQUENT_CHECK;
1753		1879
1754	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1880	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1755	{	1881	{
1756	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1882	int feed_count = 0;
1757		1883
1758	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1884	do
1759
1760	/* first reschedule or stop timer */
1761	if (w->reschedule_cb)
1762	{	1885	{
		1886	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1887
		1888	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		1889
		1890	/* first reschedule or stop timer */
		1891	if (w->reschedule_cb)
		1892	{
1763	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1893	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1764		1894
1765	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1895	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1766		1896
1767	ANHE_at_cache (periodics [HEAP0]);	1897	ANHE_at_cache (periodics [HEAP0]);
1768	downheap (periodics, periodiccnt, HEAP0);	1898	downheap (periodics, periodiccnt, HEAP0);
		1899	}
		1900	else if (w->interval)
		1901	{
		1902	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1903	/* if next trigger time is not sufficiently in the future, put it there */
		1904	/* this might happen because of floating point inexactness */
		1905	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1906	{
		1907	ev_at (w) += w->interval;
		1908
		1909	/* if interval is unreasonably low we might still have a time in the past */
		1910	/* so correct this. this will make the periodic very inexact, but the user */
		1911	/* has effectively asked to get triggered more often than possible */
		1912	if (ev_at (w) < ev_rt_now)
		1913	ev_at (w) = ev_rt_now;
		1914	}
		1915
		1916	ANHE_at_cache (periodics [HEAP0]);
		1917	downheap (periodics, periodiccnt, HEAP0);
		1918	}
		1919	else
		1920	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1921
		1922	EV_FREQUENT_CHECK;
		1923	feed_reverse (EV_A_ (W)w);
1769	}	1924	}
1770	else if (w->interval)	1925	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1771	{
1772	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1773	/* if next trigger time is not sufficiently in the future, put it there */
1774	/* this might happen because of floating point inexactness */
1775	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1776	{
1777	ev_at (w) += w->interval;
1778		1926
1779	/* if interval is unreasonably low we might still have a time in the past */
1780	/* so correct this. this will make the periodic very inexact, but the user */
1781	/* has effectively asked to get triggered more often than possible */
1782	if (ev_at (w) < ev_rt_now)
1783	ev_at (w) = ev_rt_now;
1784	}
1785
1786	ANHE_at_cache (periodics [HEAP0]);
1787	downheap (periodics, periodiccnt, HEAP0);
1788	}
1789	else
1790	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1791
1792	EV_FREQUENT_CHECK;
1793	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1927	feed_reverse_done (EV_A_ EV_PERIODIC);
1794	}	1928	}
1795	}	1929	}
1796		1930
		1931	/* simply recalculate all periodics */
		1932	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1797	static void noinline	1933	static void noinline
1798	periodics_reschedule (EV_P)	1934	periodics_reschedule (EV_P)
1799	{	1935	{
1800	int i;	1936	int i;
1801		1937
…		…
1814		1950
1815	reheap (periodics, periodiccnt);	1951	reheap (periodics, periodiccnt);
1816	}	1952	}
1817	#endif	1953	#endif
1818		1954
1819	void inline_speed	1955	/* adjust all timers by a given offset */
		1956	static void noinline
		1957	timers_reschedule (EV_P_ ev_tstamp adjust)
		1958	{
		1959	int i;
		1960
		1961	for (i = 0; i < timercnt; ++i)
		1962	{
		1963	ANHE *he = timers + i + HEAP0;
		1964	ANHE_w (*he)->at += adjust;
		1965	ANHE_at_cache (*he);
		1966	}
		1967	}
		1968
		1969	/* fetch new monotonic and realtime times from the kernel */
		1970	/* also detetc if there was a timejump, and act accordingly */
		1971	inline_speed void
1820	time_update (EV_P_ ev_tstamp max_block)	1972	time_update (EV_P_ ev_tstamp max_block)
1821	{	1973	{
1822	int i;
1823
1824	#if EV_USE_MONOTONIC	1974	#if EV_USE_MONOTONIC
1825	if (expect_true (have_monotonic))	1975	if (expect_true (have_monotonic))
1826	{	1976	{
		1977	int i;
1827	ev_tstamp odiff = rtmn_diff;	1978	ev_tstamp odiff = rtmn_diff;
1828		1979
1829	mn_now = get_clock ();	1980	mn_now = get_clock ();
1830		1981
1831	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1982	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1857	ev_rt_now = ev_time ();	2008	ev_rt_now = ev_time ();
1858	mn_now = get_clock ();	2009	mn_now = get_clock ();
1859	now_floor = mn_now;	2010	now_floor = mn_now;
1860	}	2011	}
1861		2012
		2013	/* no timer adjustment, as the monotonic clock doesn't jump */
		2014	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1862	# if EV_PERIODIC_ENABLE	2015	# if EV_PERIODIC_ENABLE
1863	periodics_reschedule (EV_A);	2016	periodics_reschedule (EV_A);
1864	# endif	2017	# endif
1865	/* no timer adjustment, as the monotonic clock doesn't jump */
1866	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1867	}	2018	}
1868	else	2019	else
1869	#endif	2020	#endif
1870	{	2021	{
1871	ev_rt_now = ev_time ();	2022	ev_rt_now = ev_time ();
1872		2023
1873	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2024	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1874	{	2025	{
		2026	/* adjust timers. this is easy, as the offset is the same for all of them */
		2027	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1875	#if EV_PERIODIC_ENABLE	2028	#if EV_PERIODIC_ENABLE
1876	periodics_reschedule (EV_A);	2029	periodics_reschedule (EV_A);
1877	#endif	2030	#endif
1878	/* adjust timers. this is easy, as the offset is the same for all of them */
1879	for (i = 0; i < timercnt; ++i)
1880	{
1881	ANHE *he = timers + i + HEAP0;
1882	ANHE_w (*he)->at += ev_rt_now - mn_now;
1883	ANHE_at_cache (*he);
1884	}
1885	}	2031	}
1886		2032
1887	mn_now = ev_rt_now;	2033	mn_now = ev_rt_now;
1888	}	2034	}
1889	}	2035	}
1890		2036
1891	void	2037	void
1892	ev_ref (EV_P)
1893	{
1894	++activecnt;
1895	}
1896
1897	void
1898	ev_unref (EV_P)
1899	{
1900	--activecnt;
1901	}
1902
1903	void
1904	ev_now_update (EV_P)
1905	{
1906	time_update (EV_A_ 1e100);
1907	}
1908
1909	static int loop_done;
1910
1911	void
1912	ev_loop (EV_P_ int flags)	2038	ev_loop (EV_P_ int flags)
1913	{	2039	{
		2040	++loop_depth;
		2041
1914	loop_done = EVUNLOOP_CANCEL;	2042	loop_done = EVUNLOOP_CANCEL;
1915		2043
1916	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2044	invoke_cb (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1917		2045
1918	do	2046	do
1919	{	2047	{
1920	#if EV_VERIFY >= 2	2048	#if EV_VERIFY >= 2
1921	ev_loop_verify (EV_A);	2049	ev_loop_verify (EV_A);
…		…
1934	/* we might have forked, so queue fork handlers */	2062	/* we might have forked, so queue fork handlers */
1935	if (expect_false (postfork))	2063	if (expect_false (postfork))
1936	if (forkcnt)	2064	if (forkcnt)
1937	{	2065	{
1938	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2066	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1939	call_pending (EV_A);	2067	invoke_cb (EV_A);
1940	}	2068	}
1941	#endif	2069	#endif
1942		2070
1943	/* queue prepare watchers (and execute them) */	2071	/* queue prepare watchers (and execute them) */
1944	if (expect_false (preparecnt))	2072	if (expect_false (preparecnt))
1945	{	2073	{
1946	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2074	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1947	call_pending (EV_A);	2075	invoke_cb (EV_A);
1948	}	2076	}
1949
1950	if (expect_false (!activecnt))
1951	break;
1952		2077
1953	/* we might have forked, so reify kernel state if necessary */	2078	/* we might have forked, so reify kernel state if necessary */
1954	if (expect_false (postfork))	2079	if (expect_false (postfork))
1955	loop_fork (EV_A);	2080	loop_fork (EV_A);
1956		2081
…		…
1962	ev_tstamp waittime = 0.;	2087	ev_tstamp waittime = 0.;
1963	ev_tstamp sleeptime = 0.;	2088	ev_tstamp sleeptime = 0.;
1964		2089
1965	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2090	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1966	{	2091	{
		2092	/* remember old timestamp for io_blocktime calculation */
		2093	ev_tstamp prev_mn_now = mn_now;
		2094
1967	/* update time to cancel out callback processing overhead */	2095	/* update time to cancel out callback processing overhead */
1968	time_update (EV_A_ 1e100);	2096	time_update (EV_A_ 1e100);
1969		2097
1970	waittime = MAX_BLOCKTIME;	2098	waittime = MAX_BLOCKTIME;
1971		2099
…		…
1981	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2109	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1982	if (waittime > to) waittime = to;	2110	if (waittime > to) waittime = to;
1983	}	2111	}
1984	#endif	2112	#endif
1985		2113
		2114	/* don't let timeouts decrease the waittime below timeout_blocktime */
1986	if (expect_false (waittime < timeout_blocktime))	2115	if (expect_false (waittime < timeout_blocktime))
1987	waittime = timeout_blocktime;	2116	waittime = timeout_blocktime;
1988		2117
1989	sleeptime = waittime - backend_fudge;	2118	/* extra check because io_blocktime is commonly 0 */
1990
1991	if (expect_true (sleeptime > io_blocktime))	2119	if (expect_false (io_blocktime))
1992	sleeptime = io_blocktime;
1993
1994	if (sleeptime)
1995	{	2120	{
		2121	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2122
		2123	if (sleeptime > waittime - backend_fudge)
		2124	sleeptime = waittime - backend_fudge;
		2125
		2126	if (expect_true (sleeptime > 0.))
		2127	{
1996	ev_sleep (sleeptime);	2128	ev_sleep (sleeptime);
1997	waittime -= sleeptime;	2129	waittime -= sleeptime;
		2130	}
1998	}	2131	}
1999	}	2132	}
2000		2133
2001	++loop_count;	2134	++loop_count;
2002	backend_poll (EV_A_ waittime);	2135	backend_poll (EV_A_ waittime);
…		…
2018		2151
2019	/* queue check watchers, to be executed first */	2152	/* queue check watchers, to be executed first */
2020	if (expect_false (checkcnt))	2153	if (expect_false (checkcnt))
2021	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2154	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2022		2155
2023	call_pending (EV_A);	2156	invoke_cb (EV_A);
2024	}	2157	}
2025	while (expect_true (	2158	while (expect_true (
2026	activecnt	2159	activecnt
2027	&& !loop_done	2160	&& !loop_done
2028	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2161	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2029	));	2162	));
2030		2163
2031	if (loop_done == EVUNLOOP_ONE)	2164	if (loop_done == EVUNLOOP_ONE)
2032	loop_done = EVUNLOOP_CANCEL;	2165	loop_done = EVUNLOOP_CANCEL;
		2166
		2167	--loop_depth;
2033	}	2168	}
2034		2169
2035	void	2170	void
2036	ev_unloop (EV_P_ int how)	2171	ev_unloop (EV_P_ int how)
2037	{	2172	{
2038	loop_done = how;	2173	loop_done = how;
2039	}	2174	}
2040		2175
		2176	void
		2177	ev_ref (EV_P)
		2178	{
		2179	++activecnt;
		2180	}
		2181
		2182	void
		2183	ev_unref (EV_P)
		2184	{
		2185	--activecnt;
		2186	}
		2187
		2188	void
		2189	ev_now_update (EV_P)
		2190	{
		2191	time_update (EV_A_ 1e100);
		2192	}
		2193
		2194	void
		2195	ev_suspend (EV_P)
		2196	{
		2197	ev_now_update (EV_A);
		2198	}
		2199
		2200	void
		2201	ev_resume (EV_P)
		2202	{
		2203	ev_tstamp mn_prev = mn_now;
		2204
		2205	ev_now_update (EV_A);
		2206	timers_reschedule (EV_A_ mn_now - mn_prev);
		2207	#if EV_PERIODIC_ENABLE
		2208	/* TODO: really do this? */
		2209	periodics_reschedule (EV_A);
		2210	#endif
		2211	}
		2212
2041	/*****************************************************************************/	2213	/*****************************************************************************/
		2214	/* singly-linked list management, used when the expected list length is short */
2042		2215
2043	void inline_size	2216	inline_size void
2044	wlist_add (WL *head, WL elem)	2217	wlist_add (WL *head, WL elem)
2045	{	2218	{
2046	elem->next = *head;	2219	elem->next = *head;
2047	*head = elem;	2220	*head = elem;
2048	}	2221	}
2049		2222
2050	void inline_size	2223	inline_size void
2051	wlist_del (WL *head, WL elem)	2224	wlist_del (WL *head, WL elem)
2052	{	2225	{
2053	while (*head)	2226	while (*head)
2054	{	2227	{
2055	if (*head == elem)	2228	if (*head == elem)
…		…
2060		2233
2061	head = &(*head)->next;	2234	head = &(*head)->next;
2062	}	2235	}
2063	}	2236	}
2064		2237
2065	void inline_speed	2238	/* internal, faster, version of ev_clear_pending */
		2239	inline_speed void
2066	clear_pending (EV_P_ W w)	2240	clear_pending (EV_P_ W w)
2067	{	2241	{
2068	if (w->pending)	2242	if (w->pending)
2069	{	2243	{
2070	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2244	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2071	w->pending = 0;	2245	w->pending = 0;
2072	}	2246	}
2073	}	2247	}
2074		2248
2075	int	2249	int
…		…
2079	int pending = w_->pending;	2253	int pending = w_->pending;
2080		2254
2081	if (expect_true (pending))	2255	if (expect_true (pending))
2082	{	2256	{
2083	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2257	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2258	p->w = (W)&pending_w;
2084	w_->pending = 0;	2259	w_->pending = 0;
2085	p->w = 0;
2086	return p->events;	2260	return p->events;
2087	}	2261	}
2088	else	2262	else
2089	return 0;	2263	return 0;
2090	}	2264	}
2091		2265
2092	void inline_size	2266	inline_size void
2093	pri_adjust (EV_P_ W w)	2267	pri_adjust (EV_P_ W w)
2094	{	2268	{
2095	int pri = w->priority;	2269	int pri = ev_priority (w);
2096	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2270	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2097	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2271	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2098	w->priority = pri;	2272	ev_set_priority (w, pri);
2099	}	2273	}
2100		2274
2101	void inline_speed	2275	inline_speed void
2102	ev_start (EV_P_ W w, int active)	2276	ev_start (EV_P_ W w, int active)
2103	{	2277	{
2104	pri_adjust (EV_A_ w);	2278	pri_adjust (EV_A_ w);
2105	w->active = active;	2279	w->active = active;
2106	ev_ref (EV_A);	2280	ev_ref (EV_A);
2107	}	2281	}
2108		2282
2109	void inline_size	2283	inline_size void
2110	ev_stop (EV_P_ W w)	2284	ev_stop (EV_P_ W w)
2111	{	2285	{
2112	ev_unref (EV_A);	2286	ev_unref (EV_A);
2113	w->active = 0;	2287	w->active = 0;
2114	}	2288	}
…		…
2121	int fd = w->fd;	2295	int fd = w->fd;
2122		2296
2123	if (expect_false (ev_is_active (w)))	2297	if (expect_false (ev_is_active (w)))
2124	return;	2298	return;
2125		2299
2126	assert (("ev_io_start called with negative fd", fd >= 0));	2300	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2127	assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));	2301	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2128		2302
2129	EV_FREQUENT_CHECK;	2303	EV_FREQUENT_CHECK;
2130		2304
2131	ev_start (EV_A_ (W)w, 1);	2305	ev_start (EV_A_ (W)w, 1);
2132	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2306	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2133	wlist_add (&anfds[fd].head, (WL)w);	2307	wlist_add (&anfds[fd].head, (WL)w);
2134		2308
2135	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2309	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2136	w->events &= ~EV_IOFDSET;	2310	w->events &= ~EV__IOFDSET;
2137		2311
2138	EV_FREQUENT_CHECK;	2312	EV_FREQUENT_CHECK;
2139	}	2313	}
2140		2314
2141	void noinline	2315	void noinline
…		…
2143	{	2317	{
2144	clear_pending (EV_A_ (W)w);	2318	clear_pending (EV_A_ (W)w);
2145	if (expect_false (!ev_is_active (w)))	2319	if (expect_false (!ev_is_active (w)))
2146	return;	2320	return;
2147		2321
2148	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2322	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2149		2323
2150	EV_FREQUENT_CHECK;	2324	EV_FREQUENT_CHECK;
2151		2325
2152	wlist_del (&anfds[w->fd].head, (WL)w);	2326	wlist_del (&anfds[w->fd].head, (WL)w);
2153	ev_stop (EV_A_ (W)w);	2327	ev_stop (EV_A_ (W)w);
…		…
2163	if (expect_false (ev_is_active (w)))	2337	if (expect_false (ev_is_active (w)))
2164	return;	2338	return;
2165		2339
2166	ev_at (w) += mn_now;	2340	ev_at (w) += mn_now;
2167		2341
2168	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2342	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2169		2343
2170	EV_FREQUENT_CHECK;	2344	EV_FREQUENT_CHECK;
2171		2345
2172	++timercnt;	2346	++timercnt;
2173	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2347	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2176	ANHE_at_cache (timers [ev_active (w)]);	2350	ANHE_at_cache (timers [ev_active (w)]);
2177	upheap (timers, ev_active (w));	2351	upheap (timers, ev_active (w));
2178		2352
2179	EV_FREQUENT_CHECK;	2353	EV_FREQUENT_CHECK;
2180		2354
2181	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2355	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2182	}	2356	}
2183		2357
2184	void noinline	2358	void noinline
2185	ev_timer_stop (EV_P_ ev_timer *w)	2359	ev_timer_stop (EV_P_ ev_timer *w)
2186	{	2360	{
…		…
2191	EV_FREQUENT_CHECK;	2365	EV_FREQUENT_CHECK;
2192		2366
2193	{	2367	{
2194	int active = ev_active (w);	2368	int active = ev_active (w);
2195		2369
2196	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2370	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2197		2371
2198	--timercnt;	2372	--timercnt;
2199		2373
2200	if (expect_true (active < timercnt + HEAP0))	2374	if (expect_true (active < timercnt + HEAP0))
2201	{	2375	{
…		…
2245		2419
2246	if (w->reschedule_cb)	2420	if (w->reschedule_cb)
2247	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2421	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2248	else if (w->interval)	2422	else if (w->interval)
2249	{	2423	{
2250	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2424	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2251	/* this formula differs from the one in periodic_reify because we do not always round up */	2425	/* this formula differs from the one in periodic_reify because we do not always round up */
2252	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2426	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2253	}	2427	}
2254	else	2428	else
2255	ev_at (w) = w->offset;	2429	ev_at (w) = w->offset;
…		…
2263	ANHE_at_cache (periodics [ev_active (w)]);	2437	ANHE_at_cache (periodics [ev_active (w)]);
2264	upheap (periodics, ev_active (w));	2438	upheap (periodics, ev_active (w));
2265		2439
2266	EV_FREQUENT_CHECK;	2440	EV_FREQUENT_CHECK;
2267		2441
2268	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2442	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2269	}	2443	}
2270		2444
2271	void noinline	2445	void noinline
2272	ev_periodic_stop (EV_P_ ev_periodic *w)	2446	ev_periodic_stop (EV_P_ ev_periodic *w)
2273	{	2447	{
…		…
2278	EV_FREQUENT_CHECK;	2452	EV_FREQUENT_CHECK;
2279		2453
2280	{	2454	{
2281	int active = ev_active (w);	2455	int active = ev_active (w);
2282		2456
2283	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2457	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2284		2458
2285	--periodiccnt;	2459	--periodiccnt;
2286		2460
2287	if (expect_true (active < periodiccnt + HEAP0))	2461	if (expect_true (active < periodiccnt + HEAP0))
2288	{	2462	{
…		…
2311		2485
2312	void noinline	2486	void noinline
2313	ev_signal_start (EV_P_ ev_signal *w)	2487	ev_signal_start (EV_P_ ev_signal *w)
2314	{	2488	{
2315	#if EV_MULTIPLICITY	2489	#if EV_MULTIPLICITY
2316	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2490	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2317	#endif	2491	#endif
2318	if (expect_false (ev_is_active (w)))	2492	if (expect_false (ev_is_active (w)))
2319	return;	2493	return;
2320		2494
2321	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2495	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2322		2496
2323	evpipe_init (EV_A);	2497	evpipe_init (EV_A);
2324		2498
2325	EV_FREQUENT_CHECK;	2499	EV_FREQUENT_CHECK;
2326		2500
…		…
2377		2551
2378	void	2552	void
2379	ev_child_start (EV_P_ ev_child *w)	2553	ev_child_start (EV_P_ ev_child *w)
2380	{	2554	{
2381	#if EV_MULTIPLICITY	2555	#if EV_MULTIPLICITY
2382	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2556	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2383	#endif	2557	#endif
2384	if (expect_false (ev_is_active (w)))	2558	if (expect_false (ev_is_active (w)))
2385	return;	2559	return;
2386		2560
2387	EV_FREQUENT_CHECK;	2561	EV_FREQUENT_CHECK;
…		…
2412	# ifdef _WIN32	2586	# ifdef _WIN32
2413	# undef lstat	2587	# undef lstat
2414	# define lstat(a,b) _stati64 (a,b)	2588	# define lstat(a,b) _stati64 (a,b)
2415	# endif	2589	# endif
2416		2590
2417	#define DEF_STAT_INTERVAL 5.0074891	2591	#define DEF_STAT_INTERVAL 5.0074891
		2592	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2418	#define MIN_STAT_INTERVAL 0.1074891	2593	#define MIN_STAT_INTERVAL 0.1074891
2419		2594
2420	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2595	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2421		2596
2422	#if EV_USE_INOTIFY	2597	#if EV_USE_INOTIFY
2423	# define EV_INOTIFY_BUFSIZE 8192	2598	# define EV_INOTIFY_BUFSIZE 8192
…		…
2427	{	2602	{
2428	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);	2603	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2429		2604
2430	if (w->wd < 0)	2605	if (w->wd < 0)
2431	{	2606	{
		2607	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2432	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2608	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2433		2609
2434	/* monitor some parent directory for speedup hints */	2610	/* monitor some parent directory for speedup hints */
2435	/* note that exceeding the hardcoded limit is not a correctness issue, */	2611	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2436	/* but an efficiency issue only */	2612	/* but an efficiency issue only */
2437	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2613	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2438	{	2614	{
2439	char path [4096];	2615	char path [4096];
2440	strcpy (path, w->path);	2616	strcpy (path, w->path);
…		…
2444	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2620	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2445	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2621	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2446		2622
2447	char *pend = strrchr (path, '/');	2623	char *pend = strrchr (path, '/');
2448		2624
2449	if (!pend)	2625	if (!pend || pend == path)
2450	break; /* whoops, no '/', complain to your admin */	2626	break;
2451		2627
2452	*pend = 0;	2628	*pend = 0;
2453	w->wd = inotify_add_watch (fs_fd, path, mask);	2629	w->wd = inotify_add_watch (fs_fd, path, mask);
2454	}	2630	}
2455	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2631	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2456	}	2632	}
2457	}	2633	}
2458	else
2459	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2460		2634
2461	if (w->wd >= 0)	2635	if (w->wd >= 0)
		2636	{
2462	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2637	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2638
		2639	/* now local changes will be tracked by inotify, but remote changes won't */
		2640	/* unless the filesystem it known to be local, we therefore still poll */
		2641	/* also do poll on <2.6.25, but with normal frequency */
		2642	struct statfs sfs;
		2643
		2644	if (fs_2625 && !statfs (w->path, &sfs))
		2645	if (sfs.f_type == 0x1373 /* devfs */
		2646	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2647	|| sfs.f_type == 0x3153464a /* jfs */
		2648	|| sfs.f_type == 0x52654973 /* reiser3 */
		2649	|| sfs.f_type == 0x01021994 /* tempfs */
		2650	|| sfs.f_type == 0x58465342 /* xfs */)
		2651	return;
		2652
		2653	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2654	ev_timer_again (EV_A_ &w->timer);
		2655	}
2463	}	2656	}
2464		2657
2465	static void noinline	2658	static void noinline
2466	infy_del (EV_P_ ev_stat *w)	2659	infy_del (EV_P_ ev_stat *w)
2467	{	2660	{
…		…
2497		2690
2498	if (w->wd == wd || wd == -1)	2691	if (w->wd == wd || wd == -1)
2499	{	2692	{
2500	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2693	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2501	{	2694	{
		2695	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2502	w->wd = -1;	2696	w->wd = -1;
2503	infy_add (EV_A_ w); /* re-add, no matter what */	2697	infy_add (EV_A_ w); /* re-add, no matter what */
2504	}	2698	}
2505		2699
2506	stat_timer_cb (EV_A_ &w->timer, 0);	2700	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2519		2713
2520	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2714	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2521	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2715	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2522	}	2716	}
2523		2717
2524	void inline_size	2718	inline_size void
2525	infy_init (EV_P)	2719	check_2625 (EV_P)
2526	{	2720	{
2527	if (fs_fd != -2)
2528	return;
2529
2530	/* kernels < 2.6.25 are borked	2721	/* kernels < 2.6.25 are borked
2531	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2722	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2532	*/	2723	*/
2533	{
2534	struct utsname buf;	2724	struct utsname buf;
2535	int major, minor, micro;	2725	int major, minor, micro;
2536		2726
2537	fs_fd = -1;
2538
2539	if (uname (&buf))	2727	if (uname (&buf))
2540	return;	2728	return;
2541		2729
2542	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2730	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2543	return;	2731	return;
2544		2732
2545	if (major < 2	2733	if (major < 2
2546	|| (major == 2 && minor < 6)	2734	|| (major == 2 && minor < 6)
2547	|| (major == 2 && minor == 6 && micro < 25))	2735	|| (major == 2 && minor == 6 && micro < 25))
2548	return;	2736	return;
2549	}	2737
		2738	fs_2625 = 1;
		2739	}
		2740
		2741	inline_size void
		2742	infy_init (EV_P)
		2743	{
		2744	if (fs_fd != -2)
		2745	return;
		2746
		2747	fs_fd = -1;
		2748
		2749	check_2625 (EV_A);
2550		2750
2551	fs_fd = inotify_init ();	2751	fs_fd = inotify_init ();
2552		2752
2553	if (fs_fd >= 0)	2753	if (fs_fd >= 0)
2554	{	2754	{
…		…
2556	ev_set_priority (&fs_w, EV_MAXPRI);	2756	ev_set_priority (&fs_w, EV_MAXPRI);
2557	ev_io_start (EV_A_ &fs_w);	2757	ev_io_start (EV_A_ &fs_w);
2558	}	2758	}
2559	}	2759	}
2560		2760
2561	void inline_size	2761	inline_size void
2562	infy_fork (EV_P)	2762	infy_fork (EV_P)
2563	{	2763	{
2564	int slot;	2764	int slot;
2565		2765
2566	if (fs_fd < 0)	2766	if (fs_fd < 0)
…		…
2582	w->wd = -1;	2782	w->wd = -1;
2583		2783
2584	if (fs_fd >= 0)	2784	if (fs_fd >= 0)
2585	infy_add (EV_A_ w); /* re-add, no matter what */	2785	infy_add (EV_A_ w); /* re-add, no matter what */
2586	else	2786	else
2587	ev_timer_start (EV_A_ &w->timer);	2787	ev_timer_again (EV_A_ &w->timer);
2588	}	2788	}
2589	}	2789	}
2590	}	2790	}
2591		2791
2592	#endif	2792	#endif
…		…
2647	ev_stat_start (EV_P_ ev_stat *w)	2847	ev_stat_start (EV_P_ ev_stat *w)
2648	{	2848	{
2649	if (expect_false (ev_is_active (w)))	2849	if (expect_false (ev_is_active (w)))
2650	return;	2850	return;
2651		2851
2652	/* since we use memcmp, we need to clear any padding data etc. */
2653	memset (&w->prev, 0, sizeof (ev_statdata));
2654	memset (&w->attr, 0, sizeof (ev_statdata));
2655
2656	ev_stat_stat (EV_A_ w);	2852	ev_stat_stat (EV_A_ w);
2657		2853
		2854	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2658	if (w->interval < MIN_STAT_INTERVAL)	2855	w->interval = MIN_STAT_INTERVAL;
2659	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2660		2856
2661	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2857	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2662	ev_set_priority (&w->timer, ev_priority (w));	2858	ev_set_priority (&w->timer, ev_priority (w));
2663		2859
2664	#if EV_USE_INOTIFY	2860	#if EV_USE_INOTIFY
2665	infy_init (EV_A);	2861	infy_init (EV_A);
2666		2862
2667	if (fs_fd >= 0)	2863	if (fs_fd >= 0)
2668	infy_add (EV_A_ w);	2864	infy_add (EV_A_ w);
2669	else	2865	else
2670	#endif	2866	#endif
2671	ev_timer_start (EV_A_ &w->timer);	2867	ev_timer_again (EV_A_ &w->timer);
2672		2868
2673	ev_start (EV_A_ (W)w, 1);	2869	ev_start (EV_A_ (W)w, 1);
2674		2870
2675	EV_FREQUENT_CHECK;	2871	EV_FREQUENT_CHECK;
2676	}	2872	}
…		…
2851	static void	3047	static void
2852	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3048	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2853	{	3049	{
2854	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3050	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2855		3051
		3052	ev_embed_stop (EV_A_ w);
		3053
2856	{	3054	{
2857	struct ev_loop *loop = w->other;	3055	struct ev_loop *loop = w->other;
2858		3056
2859	ev_loop_fork (EV_A);	3057	ev_loop_fork (EV_A);
		3058	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2860	}	3059	}
		3060
		3061	ev_embed_start (EV_A_ w);
2861	}	3062	}
2862		3063
2863	#if 0	3064	#if 0
2864	static void	3065	static void
2865	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3066	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2874	if (expect_false (ev_is_active (w)))	3075	if (expect_false (ev_is_active (w)))
2875	return;	3076	return;
2876		3077
2877	{	3078	{
2878	struct ev_loop *loop = w->other;	3079	struct ev_loop *loop = w->other;
2879	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3080	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2880	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3081	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2881	}	3082	}
2882		3083
2883	EV_FREQUENT_CHECK;	3084	EV_FREQUENT_CHECK;
2884		3085
…		…
3067	ev_timer_set (&once->to, timeout, 0.);	3268	ev_timer_set (&once->to, timeout, 0.);
3068	ev_timer_start (EV_A_ &once->to);	3269	ev_timer_start (EV_A_ &once->to);
3069	}	3270	}
3070	}	3271	}
3071		3272
		3273	/*****************************************************************************/
		3274
		3275	#if EV_WALK_ENABLE
		3276	void
		3277	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3278	{
		3279	int i, j;
		3280	ev_watcher_list *wl, *wn;
		3281
		3282	if (types & (EV_IO | EV_EMBED))
		3283	for (i = 0; i < anfdmax; ++i)
		3284	for (wl = anfds [i].head; wl; )
		3285	{
		3286	wn = wl->next;
		3287
		3288	#if EV_EMBED_ENABLE
		3289	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3290	{
		3291	if (types & EV_EMBED)
		3292	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3293	}
		3294	else
		3295	#endif
		3296	#if EV_USE_INOTIFY
		3297	if (ev_cb ((ev_io *)wl) == infy_cb)
		3298	;
		3299	else
		3300	#endif
		3301	if ((ev_io *)wl != &pipe_w)
		3302	if (types & EV_IO)
		3303	cb (EV_A_ EV_IO, wl);
		3304
		3305	wl = wn;
		3306	}
		3307
		3308	if (types & (EV_TIMER | EV_STAT))
		3309	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3310	#if EV_STAT_ENABLE
		3311	/*TODO: timer is not always active*/
		3312	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3313	{
		3314	if (types & EV_STAT)
		3315	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3316	}
		3317	else
		3318	#endif
		3319	if (types & EV_TIMER)
		3320	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3321
		3322	#if EV_PERIODIC_ENABLE
		3323	if (types & EV_PERIODIC)
		3324	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3325	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3326	#endif
		3327
		3328	#if EV_IDLE_ENABLE
		3329	if (types & EV_IDLE)
		3330	for (j = NUMPRI; i--; )
		3331	for (i = idlecnt [j]; i--; )
		3332	cb (EV_A_ EV_IDLE, idles [j][i]);
		3333	#endif
		3334
		3335	#if EV_FORK_ENABLE
		3336	if (types & EV_FORK)
		3337	for (i = forkcnt; i--; )
		3338	if (ev_cb (forks [i]) != embed_fork_cb)
		3339	cb (EV_A_ EV_FORK, forks [i]);
		3340	#endif
		3341
		3342	#if EV_ASYNC_ENABLE
		3343	if (types & EV_ASYNC)
		3344	for (i = asynccnt; i--; )
		3345	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3346	#endif
		3347
		3348	if (types & EV_PREPARE)
		3349	for (i = preparecnt; i--; )
		3350	#if EV_EMBED_ENABLE
		3351	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3352	#endif
		3353	cb (EV_A_ EV_PREPARE, prepares [i]);
		3354
		3355	if (types & EV_CHECK)
		3356	for (i = checkcnt; i--; )
		3357	cb (EV_A_ EV_CHECK, checks [i]);
		3358
		3359	if (types & EV_SIGNAL)
		3360	for (i = 0; i < signalmax; ++i)
		3361	for (wl = signals [i].head; wl; )
		3362	{
		3363	wn = wl->next;
		3364	cb (EV_A_ EV_SIGNAL, wl);
		3365	wl = wn;
		3366	}
		3367
		3368	if (types & EV_CHILD)
		3369	for (i = EV_PID_HASHSIZE; i--; )
		3370	for (wl = childs [i]; wl; )
		3371	{
		3372	wn = wl->next;
		3373	cb (EV_A_ EV_CHILD, wl);
		3374	wl = wn;
		3375	}
		3376	/* EV_STAT 0x00001000 /* stat data changed */
		3377	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3378	}
		3379	#endif
		3380
3072	#if EV_MULTIPLICITY	3381	#if EV_MULTIPLICITY
3073	#include "ev_wrap.h"	3382	#include "ev_wrap.h"
3074	#endif	3383	#endif
3075		3384
3076	#ifdef __cplusplus	3385	#ifdef __cplusplus

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