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Comparing libev/ev.c (file contents):
Revision 1.265 by root, Thu Oct 23 04:56:49 2008 UTC vs.
Revision 1.294 by root, Wed Jul 8 02:46:05 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
…		…
367	typedef ev_watcher_time *WT;	404	typedef ev_watcher_time *WT;
368		405
369	#define ev_active(w) ((W)(w))->active	406	#define ev_active(w) ((W)(w))->active
370	#define ev_at(w) ((WT)(w))->at	407	#define ev_at(w) ((WT)(w))->at
371		408
372	#if EV_USE_MONOTONIC	409	#if EV_USE_REALTIME
373	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	410	/* 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 */	411	/* giving it a reasonably high chance of working on typical architetcures */
		412	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		413	#endif
		414
		415	#if EV_USE_MONOTONIC
375	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	416	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376	#endif	417	#endif
377		418
378	#ifdef _WIN32	419	#ifdef _WIN32
379	# include "ev_win32.c"	420	# include "ev_win32.c"
…		…
388	{	429	{
389	syserr_cb = cb;	430	syserr_cb = cb;
390	}	431	}
391		432
392	static void noinline	433	static void noinline
393	syserr (const char *msg)	434	ev_syserr (const char *msg)
394	{	435	{
395	if (!msg)	436	if (!msg)
396	msg = "(libev) system error";	437	msg = "(libev) system error";
397		438
398	if (syserr_cb)	439	if (syserr_cb)
…		…
444	#define ev_malloc(size) ev_realloc (0, (size))	485	#define ev_malloc(size) ev_realloc (0, (size))
445	#define ev_free(ptr) ev_realloc ((ptr), 0)	486	#define ev_free(ptr) ev_realloc ((ptr), 0)
446		487
447	/*****************************************************************************/	488	/*****************************************************************************/
448		489
		490	/* file descriptor info structure */
449	typedef struct	491	typedef struct
450	{	492	{
451	WL head;	493	WL head;
452	unsigned char events;	494	unsigned char events; /* the events watched for */
453	unsigned char reify;	495	unsigned char reify; /* flag set when this ANFD needs reification */
454	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	496	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455	unsigned char unused; /* currently unused padding */	497	unsigned char unused;
		498	#if EV_USE_EPOLL
		499	unsigned int egen; /* generation counter to counter epoll bugs */
		500	#endif
456	#if EV_SELECT_IS_WINSOCKET	501	#if EV_SELECT_IS_WINSOCKET
457	SOCKET handle;	502	SOCKET handle;
458	#endif	503	#endif
459	} ANFD;	504	} ANFD;
460		505
		506	/* stores the pending event set for a given watcher */
461	typedef struct	507	typedef struct
462	{	508	{
463	W w;	509	W w;
464	int events;	510	int events; /* the pending event set for the given watcher */
465	} ANPENDING;	511	} ANPENDING;
466		512
467	#if EV_USE_INOTIFY	513	#if EV_USE_INOTIFY
468	/* hash table entry per inotify-id */	514	/* hash table entry per inotify-id */
469	typedef struct	515	typedef struct
…		…
472	} ANFS;	518	} ANFS;
473	#endif	519	#endif
474		520
475	/* Heap Entry */	521	/* Heap Entry */
476	#if EV_HEAP_CACHE_AT	522	#if EV_HEAP_CACHE_AT
		523	/* a heap element */
477	typedef struct {	524	typedef struct {
478	ev_tstamp at;	525	ev_tstamp at;
479	WT w;	526	WT w;
480	} ANHE;	527	} ANHE;
481		528
482	#define ANHE_w(he) (he).w /* access watcher, read-write */	529	#define ANHE_w(he) (he).w /* access watcher, read-write */
483	#define ANHE_at(he) (he).at /* access cached at, read-only */	530	#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 */	531	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
485	#else	532	#else
		533	/* a heap element */
486	typedef WT ANHE;	534	typedef WT ANHE;
487		535
488	#define ANHE_w(he) (he)	536	#define ANHE_w(he) (he)
489	#define ANHE_at(he) (he)->at	537	#define ANHE_at(he) (he)->at
490	#define ANHE_at_cache(he)	538	#define ANHE_at_cache(he)
…		…
516		564
517	#endif	565	#endif
518		566
519	/*****************************************************************************/	567	/*****************************************************************************/
520		568
		569	#ifndef EV_HAVE_EV_TIME
521	ev_tstamp	570	ev_tstamp
522	ev_time (void)	571	ev_time (void)
523	{	572	{
524	#if EV_USE_REALTIME	573	#if EV_USE_REALTIME
		574	if (expect_true (have_realtime))
		575	{
525	struct timespec ts;	576	struct timespec ts;
526	clock_gettime (CLOCK_REALTIME, &ts);	577	clock_gettime (CLOCK_REALTIME, &ts);
527	return ts.tv_sec + ts.tv_nsec * 1e-9;	578	return ts.tv_sec + ts.tv_nsec * 1e-9;
528	#else	579	}
		580	#endif
		581
529	struct timeval tv;	582	struct timeval tv;
530	gettimeofday (&tv, 0);	583	gettimeofday (&tv, 0);
531	return tv.tv_sec + tv.tv_usec * 1e-6;	584	return tv.tv_sec + tv.tv_usec * 1e-6;
532	#endif
533	}	585	}
		586	#endif
534		587
535	ev_tstamp inline_size	588	inline_size ev_tstamp
536	get_clock (void)	589	get_clock (void)
537	{	590	{
538	#if EV_USE_MONOTONIC	591	#if EV_USE_MONOTONIC
539	if (expect_true (have_monotonic))	592	if (expect_true (have_monotonic))
540	{	593	{
…		…
574		627
575	tv.tv_sec = (time_t)delay;	628	tv.tv_sec = (time_t)delay;
576	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	629	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577		630
578	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	631	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
579	/* somehting nto guaranteed by newer posix versions, but guaranteed */	632	/* somehting not guaranteed by newer posix versions, but guaranteed */
580	/* by older ones */	633	/* by older ones */
581	select (0, 0, 0, 0, &tv);	634	select (0, 0, 0, 0, &tv);
582	#endif	635	#endif
583	}	636	}
584	}	637	}
585		638
586	/*****************************************************************************/	639	/*****************************************************************************/
587		640
588	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	641	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
589		642
590	int inline_size	643	/* find a suitable new size for the given array, */
		644	/* hopefully by rounding to a ncie-to-malloc size */
		645	inline_size int
591	array_nextsize (int elem, int cur, int cnt)	646	array_nextsize (int elem, int cur, int cnt)
592	{	647	{
593	int ncur = cur + 1;	648	int ncur = cur + 1;
594		649
595	do	650	do
…		…
636	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	691	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
637	}	692	}
638	#endif	693	#endif
639		694
640	#define array_free(stem, idx) \	695	#define array_free(stem, idx) \
641	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	696	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
642		697
643	/*****************************************************************************/	698	/*****************************************************************************/
		699
		700	/* dummy callback for pending events */
		701	static void noinline
		702	pendingcb (EV_P_ ev_prepare *w, int revents)
		703	{
		704	}
644		705
645	void noinline	706	void noinline
646	ev_feed_event (EV_P_ void *w, int revents)	707	ev_feed_event (EV_P_ void *w, int revents)
647	{	708	{
648	W w_ = (W)w;	709	W w_ = (W)w;
…		…
657	pendings [pri][w_->pending - 1].w = w_;	718	pendings [pri][w_->pending - 1].w = w_;
658	pendings [pri][w_->pending - 1].events = revents;	719	pendings [pri][w_->pending - 1].events = revents;
659	}	720	}
660	}	721	}
661		722
662	void inline_speed	723	inline_speed void
		724	feed_reverse (EV_P_ W w)
		725	{
		726	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		727	rfeeds [rfeedcnt++] = w;
		728	}
		729
		730	inline_size void
		731	feed_reverse_done (EV_P_ int revents)
		732	{
		733	do
		734	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		735	while (rfeedcnt);
		736	}
		737
		738	inline_speed void
663	queue_events (EV_P_ W *events, int eventcnt, int type)	739	queue_events (EV_P_ W *events, int eventcnt, int type)
664	{	740	{
665	int i;	741	int i;
666		742
667	for (i = 0; i < eventcnt; ++i)	743	for (i = 0; i < eventcnt; ++i)
668	ev_feed_event (EV_A_ events [i], type);	744	ev_feed_event (EV_A_ events [i], type);
669	}	745	}
670		746
671	/*****************************************************************************/	747	/*****************************************************************************/
672		748
673	void inline_speed	749	inline_speed void
674	fd_event (EV_P_ int fd, int revents)	750	fd_event (EV_P_ int fd, int revents)
675	{	751	{
676	ANFD *anfd = anfds + fd;	752	ANFD *anfd = anfds + fd;
677	ev_io *w;	753	ev_io *w;
678		754
…		…
690	{	766	{
691	if (fd >= 0 && fd < anfdmax)	767	if (fd >= 0 && fd < anfdmax)
692	fd_event (EV_A_ fd, revents);	768	fd_event (EV_A_ fd, revents);
693	}	769	}
694		770
695	void inline_size	771	/* make sure the external fd watch events are in-sync */
		772	/* with the kernel/libev internal state */
		773	inline_size void
696	fd_reify (EV_P)	774	fd_reify (EV_P)
697	{	775	{
698	int i;	776	int i;
699		777
700	for (i = 0; i < fdchangecnt; ++i)	778	for (i = 0; i < fdchangecnt; ++i)
…		…
715	#ifdef EV_FD_TO_WIN32_HANDLE	793	#ifdef EV_FD_TO_WIN32_HANDLE
716	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	794	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717	#else	795	#else
718	anfd->handle = _get_osfhandle (fd);	796	anfd->handle = _get_osfhandle (fd);
719	#endif	797	#endif
720	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	798	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
721	}	799	}
722	#endif	800	#endif
723		801
724	{	802	{
725	unsigned char o_events = anfd->events;	803	unsigned char o_events = anfd->events;
726	unsigned char o_reify = anfd->reify;	804	unsigned char o_reify = anfd->reify;
727		805
728	anfd->reify = 0;	806	anfd->reify = 0;
729	anfd->events = events;	807	anfd->events = events;
730		808
731	if (o_events != events || o_reify & EV_IOFDSET)	809	if (o_events != events || o_reify & EV__IOFDSET)
732	backend_modify (EV_A_ fd, o_events, events);	810	backend_modify (EV_A_ fd, o_events, events);
733	}	811	}
734	}	812	}
735		813
736	fdchangecnt = 0;	814	fdchangecnt = 0;
737	}	815	}
738		816
739	void inline_size	817	/* something about the given fd changed */
		818	inline_size void
740	fd_change (EV_P_ int fd, int flags)	819	fd_change (EV_P_ int fd, int flags)
741	{	820	{
742	unsigned char reify = anfds [fd].reify;	821	unsigned char reify = anfds [fd].reify;
743	anfds [fd].reify |= flags;	822	anfds [fd].reify |= flags;
744		823
…		…
748	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	827	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
749	fdchanges [fdchangecnt - 1] = fd;	828	fdchanges [fdchangecnt - 1] = fd;
750	}	829	}
751	}	830	}
752		831
753	void inline_speed	832	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		833	inline_speed void
754	fd_kill (EV_P_ int fd)	834	fd_kill (EV_P_ int fd)
755	{	835	{
756	ev_io *w;	836	ev_io *w;
757		837
758	while ((w = (ev_io *)anfds [fd].head))	838	while ((w = (ev_io *)anfds [fd].head))
…		…
760	ev_io_stop (EV_A_ w);	840	ev_io_stop (EV_A_ w);
761	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	841	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
762	}	842	}
763	}	843	}
764		844
765	int inline_size	845	/* check whether the given fd is atcually valid, for error recovery */
		846	inline_size int
766	fd_valid (int fd)	847	fd_valid (int fd)
767	{	848	{
768	#ifdef _WIN32	849	#ifdef _WIN32
769	return _get_osfhandle (fd) != -1;	850	return _get_osfhandle (fd) != -1;
770	#else	851	#else
…		…
806		887
807	for (fd = 0; fd < anfdmax; ++fd)	888	for (fd = 0; fd < anfdmax; ++fd)
808	if (anfds [fd].events)	889	if (anfds [fd].events)
809	{	890	{
810	anfds [fd].events = 0;	891	anfds [fd].events = 0;
		892	anfds [fd].emask = 0;
811	fd_change (EV_A_ fd, EV_IOFDSET | 1);	893	fd_change (EV_A_ fd, EV__IOFDSET | 1);
812	}	894	}
813	}	895	}
814		896
815	/*****************************************************************************/	897	/*****************************************************************************/
816		898
…		…
832	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	914	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
833	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	915	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
834	#define UPHEAP_DONE(p,k) ((p) == (k))	916	#define UPHEAP_DONE(p,k) ((p) == (k))
835		917
836	/* away from the root */	918	/* away from the root */
837	void inline_speed	919	inline_speed void
838	downheap (ANHE *heap, int N, int k)	920	downheap (ANHE *heap, int N, int k)
839	{	921	{
840	ANHE he = heap [k];	922	ANHE he = heap [k];
841	ANHE *E = heap + N + HEAP0;	923	ANHE *E = heap + N + HEAP0;
842		924
…		…
882	#define HEAP0 1	964	#define HEAP0 1
883	#define HPARENT(k) ((k) >> 1)	965	#define HPARENT(k) ((k) >> 1)
884	#define UPHEAP_DONE(p,k) (!(p))	966	#define UPHEAP_DONE(p,k) (!(p))
885		967
886	/* away from the root */	968	/* away from the root */
887	void inline_speed	969	inline_speed void
888	downheap (ANHE *heap, int N, int k)	970	downheap (ANHE *heap, int N, int k)
889	{	971	{
890	ANHE he = heap [k];	972	ANHE he = heap [k];
891		973
892	for (;;)	974	for (;;)
…		…
912	ev_active (ANHE_w (he)) = k;	994	ev_active (ANHE_w (he)) = k;
913	}	995	}
914	#endif	996	#endif
915		997
916	/* towards the root */	998	/* towards the root */
917	void inline_speed	999	inline_speed void
918	upheap (ANHE *heap, int k)	1000	upheap (ANHE *heap, int k)
919	{	1001	{
920	ANHE he = heap [k];	1002	ANHE he = heap [k];
921		1003
922	for (;;)	1004	for (;;)
…		…
933		1015
934	heap [k] = he;	1016	heap [k] = he;
935	ev_active (ANHE_w (he)) = k;	1017	ev_active (ANHE_w (he)) = k;
936	}	1018	}
937		1019
938	void inline_size	1020	/* move an element suitably so it is in a correct place */
		1021	inline_size void
939	adjustheap (ANHE *heap, int N, int k)	1022	adjustheap (ANHE *heap, int N, int k)
940	{	1023	{
941	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1024	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
942	upheap (heap, k);	1025	upheap (heap, k);
943	else	1026	else
944	downheap (heap, N, k);	1027	downheap (heap, N, k);
945	}	1028	}
946		1029
947	/* rebuild the heap: this function is used only once and executed rarely */	1030	/* rebuild the heap: this function is used only once and executed rarely */
948	void inline_size	1031	inline_size void
949	reheap (ANHE *heap, int N)	1032	reheap (ANHE *heap, int N)
950	{	1033	{
951	int i;	1034	int i;
952		1035
953	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1036	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
956	upheap (heap, i + HEAP0);	1039	upheap (heap, i + HEAP0);
957	}	1040	}
958		1041
959	/*****************************************************************************/	1042	/*****************************************************************************/
960		1043
		1044	/* associate signal watchers to a signal signal */
961	typedef struct	1045	typedef struct
962	{	1046	{
963	WL head;	1047	WL head;
964	EV_ATOMIC_T gotsig;	1048	EV_ATOMIC_T gotsig;
965	} ANSIG;	1049	} ANSIG;
…		…
969		1053
970	static EV_ATOMIC_T gotsig;	1054	static EV_ATOMIC_T gotsig;
971		1055
972	/*****************************************************************************/	1056	/*****************************************************************************/
973		1057
974	void inline_speed	1058	/* used to prepare libev internal fd's */
		1059	/* this is not fork-safe */
		1060	inline_speed void
975	fd_intern (int fd)	1061	fd_intern (int fd)
976	{	1062	{
977	#ifdef _WIN32	1063	#ifdef _WIN32
978	unsigned long arg = 1;	1064	unsigned long arg = 1;
979	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1065	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
984	}	1070	}
985		1071
986	static void noinline	1072	static void noinline
987	evpipe_init (EV_P)	1073	evpipe_init (EV_P)
988	{	1074	{
989	if (!ev_is_active (&pipeev))	1075	if (!ev_is_active (&pipe_w))
990	{	1076	{
991	#if EV_USE_EVENTFD	1077	#if EV_USE_EVENTFD
992	if ((evfd = eventfd (0, 0)) >= 0)	1078	if ((evfd = eventfd (0, 0)) >= 0)
993	{	1079	{
994	evpipe [0] = -1;	1080	evpipe [0] = -1;
995	fd_intern (evfd);	1081	fd_intern (evfd);
996	ev_io_set (&pipeev, evfd, EV_READ);	1082	ev_io_set (&pipe_w, evfd, EV_READ);
997	}	1083	}
998	else	1084	else
999	#endif	1085	#endif
1000	{	1086	{
1001	while (pipe (evpipe))	1087	while (pipe (evpipe))
1002	syserr ("(libev) error creating signal/async pipe");	1088	ev_syserr ("(libev) error creating signal/async pipe");
1003		1089
1004	fd_intern (evpipe [0]);	1090	fd_intern (evpipe [0]);
1005	fd_intern (evpipe [1]);	1091	fd_intern (evpipe [1]);
1006	ev_io_set (&pipeev, evpipe [0], EV_READ);	1092	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1007	}	1093	}
1008		1094
1009	ev_io_start (EV_A_ &pipeev);	1095	ev_io_start (EV_A_ &pipe_w);
1010	ev_unref (EV_A); /* watcher should not keep loop alive */	1096	ev_unref (EV_A); /* watcher should not keep loop alive */
1011	}	1097	}
1012	}	1098	}
1013		1099
1014	void inline_size	1100	inline_size void
1015	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1101	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1016	{	1102	{
1017	if (!*flag)	1103	if (!*flag)
1018	{	1104	{
1019	int old_errno = errno; /* save errno because write might clobber it */	1105	int old_errno = errno; /* save errno because write might clobber it */
…		…
1032		1118
1033	errno = old_errno;	1119	errno = old_errno;
1034	}	1120	}
1035	}	1121	}
1036		1122
		1123	/* called whenever the libev signal pipe */
		1124	/* got some events (signal, async) */
1037	static void	1125	static void
1038	pipecb (EV_P_ ev_io *iow, int revents)	1126	pipecb (EV_P_ ev_io *iow, int revents)
1039	{	1127	{
1040	#if EV_USE_EVENTFD	1128	#if EV_USE_EVENTFD
1041	if (evfd >= 0)	1129	if (evfd >= 0)
…		…
1097	ev_feed_signal_event (EV_P_ int signum)	1185	ev_feed_signal_event (EV_P_ int signum)
1098	{	1186	{
1099	WL w;	1187	WL w;
1100		1188
1101	#if EV_MULTIPLICITY	1189	#if EV_MULTIPLICITY
1102	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1190	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1103	#endif	1191	#endif
1104		1192
1105	--signum;	1193	--signum;
1106		1194
1107	if (signum < 0 || signum >= signalmax)	1195	if (signum < 0 || signum >= signalmax)
…		…
1123		1211
1124	#ifndef WIFCONTINUED	1212	#ifndef WIFCONTINUED
1125	# define WIFCONTINUED(status) 0	1213	# define WIFCONTINUED(status) 0
1126	#endif	1214	#endif
1127		1215
1128	void inline_speed	1216	/* handle a single child status event */
		1217	inline_speed void
1129	child_reap (EV_P_ int chain, int pid, int status)	1218	child_reap (EV_P_ int chain, int pid, int status)
1130	{	1219	{
1131	ev_child *w;	1220	ev_child *w;
1132	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1221	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1133		1222
…		…
1146		1235
1147	#ifndef WCONTINUED	1236	#ifndef WCONTINUED
1148	# define WCONTINUED 0	1237	# define WCONTINUED 0
1149	#endif	1238	#endif
1150		1239
		1240	/* called on sigchld etc., calls waitpid */
1151	static void	1241	static void
1152	childcb (EV_P_ ev_signal *sw, int revents)	1242	childcb (EV_P_ ev_signal *sw, int revents)
1153	{	1243	{
1154	int pid, status;	1244	int pid, status;
1155		1245
…		…
1236	/* kqueue is borked on everything but netbsd apparently */	1326	/* kqueue is borked on everything but netbsd apparently */
1237	/* it usually doesn't work correctly on anything but sockets and pipes */	1327	/* it usually doesn't work correctly on anything but sockets and pipes */
1238	flags &= ~EVBACKEND_KQUEUE;	1328	flags &= ~EVBACKEND_KQUEUE;
1239	#endif	1329	#endif
1240	#ifdef __APPLE__	1330	#ifdef __APPLE__
1241	// flags &= ~EVBACKEND_KQUEUE; for documentation	1331	/* only select works correctly on that "unix-certified" platform */
1242	flags &= ~EVBACKEND_POLL;	1332	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1333	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1243	#endif	1334	#endif
1244		1335
1245	return flags;	1336	return flags;
1246	}	1337	}
1247		1338
…		…
1267	ev_loop_count (EV_P)	1358	ev_loop_count (EV_P)
1268	{	1359	{
1269	return loop_count;	1360	return loop_count;
1270	}	1361	}
1271		1362
		1363	unsigned int
		1364	ev_loop_depth (EV_P)
		1365	{
		1366	return loop_depth;
		1367	}
		1368
1272	void	1369	void
1273	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1370	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1274	{	1371	{
1275	io_blocktime = interval;	1372	io_blocktime = interval;
1276	}	1373	}
…		…
1279	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1376	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1280	{	1377	{
1281	timeout_blocktime = interval;	1378	timeout_blocktime = interval;
1282	}	1379	}
1283		1380
		1381	/* initialise a loop structure, must be zero-initialised */
1284	static void noinline	1382	static void noinline
1285	loop_init (EV_P_ unsigned int flags)	1383	loop_init (EV_P_ unsigned int flags)
1286	{	1384	{
1287	if (!backend)	1385	if (!backend)
1288	{	1386	{
		1387	#if EV_USE_REALTIME
		1388	if (!have_realtime)
		1389	{
		1390	struct timespec ts;
		1391
		1392	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1393	have_realtime = 1;
		1394	}
		1395	#endif
		1396
1289	#if EV_USE_MONOTONIC	1397	#if EV_USE_MONOTONIC
		1398	if (!have_monotonic)
1290	{	1399	{
1291	struct timespec ts;	1400	struct timespec ts;
		1401
1292	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1402	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1293	have_monotonic = 1;	1403	have_monotonic = 1;
1294	}	1404	}
1295	#endif	1405	#endif
1296		1406
1297	ev_rt_now = ev_time ();	1407	ev_rt_now = ev_time ();
1298	mn_now = get_clock ();	1408	mn_now = get_clock ();
1299	now_floor = mn_now;	1409	now_floor = mn_now;
…		…
1336	#endif	1446	#endif
1337	#if EV_USE_SELECT	1447	#if EV_USE_SELECT
1338	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1448	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1339	#endif	1449	#endif
1340		1450
		1451	ev_prepare_init (&pending_w, pendingcb);
		1452
1341	ev_init (&pipeev, pipecb);	1453	ev_init (&pipe_w, pipecb);
1342	ev_set_priority (&pipeev, EV_MAXPRI);	1454	ev_set_priority (&pipe_w, EV_MAXPRI);
1343	}	1455	}
1344	}	1456	}
1345		1457
		1458	/* free up a loop structure */
1346	static void noinline	1459	static void noinline
1347	loop_destroy (EV_P)	1460	loop_destroy (EV_P)
1348	{	1461	{
1349	int i;	1462	int i;
1350		1463
1351	if (ev_is_active (&pipeev))	1464	if (ev_is_active (&pipe_w))
1352	{	1465	{
1353	ev_ref (EV_A); /* signal watcher */	1466	ev_ref (EV_A); /* signal watcher */
1354	ev_io_stop (EV_A_ &pipeev);	1467	ev_io_stop (EV_A_ &pipe_w);
1355		1468
1356	#if EV_USE_EVENTFD	1469	#if EV_USE_EVENTFD
1357	if (evfd >= 0)	1470	if (evfd >= 0)
1358	close (evfd);	1471	close (evfd);
1359	#endif	1472	#endif
…		…
1398	}	1511	}
1399		1512
1400	ev_free (anfds); anfdmax = 0;	1513	ev_free (anfds); anfdmax = 0;
1401		1514
1402	/* have to use the microsoft-never-gets-it-right macro */	1515	/* have to use the microsoft-never-gets-it-right macro */
		1516	array_free (rfeed, EMPTY);
1403	array_free (fdchange, EMPTY);	1517	array_free (fdchange, EMPTY);
1404	array_free (timer, EMPTY);	1518	array_free (timer, EMPTY);
1405	#if EV_PERIODIC_ENABLE	1519	#if EV_PERIODIC_ENABLE
1406	array_free (periodic, EMPTY);	1520	array_free (periodic, EMPTY);
1407	#endif	1521	#endif
…		…
1416		1530
1417	backend = 0;	1531	backend = 0;
1418	}	1532	}
1419		1533
1420	#if EV_USE_INOTIFY	1534	#if EV_USE_INOTIFY
1421	void inline_size infy_fork (EV_P);	1535	inline_size void infy_fork (EV_P);
1422	#endif	1536	#endif
1423		1537
1424	void inline_size	1538	inline_size void
1425	loop_fork (EV_P)	1539	loop_fork (EV_P)
1426	{	1540	{
1427	#if EV_USE_PORT	1541	#if EV_USE_PORT
1428	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1542	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1429	#endif	1543	#endif
…		…
1435	#endif	1549	#endif
1436	#if EV_USE_INOTIFY	1550	#if EV_USE_INOTIFY
1437	infy_fork (EV_A);	1551	infy_fork (EV_A);
1438	#endif	1552	#endif
1439		1553
1440	if (ev_is_active (&pipeev))	1554	if (ev_is_active (&pipe_w))
1441	{	1555	{
1442	/* this "locks" the handlers against writing to the pipe */	1556	/* this "locks" the handlers against writing to the pipe */
1443	/* while we modify the fd vars */	1557	/* while we modify the fd vars */
1444	gotsig = 1;	1558	gotsig = 1;
1445	#if EV_ASYNC_ENABLE	1559	#if EV_ASYNC_ENABLE
1446	gotasync = 1;	1560	gotasync = 1;
1447	#endif	1561	#endif
1448		1562
1449	ev_ref (EV_A);	1563	ev_ref (EV_A);
1450	ev_io_stop (EV_A_ &pipeev);	1564	ev_io_stop (EV_A_ &pipe_w);
1451		1565
1452	#if EV_USE_EVENTFD	1566	#if EV_USE_EVENTFD
1453	if (evfd >= 0)	1567	if (evfd >= 0)
1454	close (evfd);	1568	close (evfd);
1455	#endif	1569	#endif
…		…
1460	close (evpipe [1]);	1574	close (evpipe [1]);
1461	}	1575	}
1462		1576
1463	evpipe_init (EV_A);	1577	evpipe_init (EV_A);
1464	/* now iterate over everything, in case we missed something */	1578	/* now iterate over everything, in case we missed something */
1465	pipecb (EV_A_ &pipeev, EV_READ);	1579	pipecb (EV_A_ &pipe_w, EV_READ);
1466	}	1580	}
1467		1581
1468	postfork = 0;	1582	postfork = 0;
1469	}	1583	}
1470		1584
…		…
1500		1614
1501	#if EV_VERIFY	1615	#if EV_VERIFY
1502	static void noinline	1616	static void noinline
1503	verify_watcher (EV_P_ W w)	1617	verify_watcher (EV_P_ W w)
1504	{	1618	{
1505	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1619	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1506		1620
1507	if (w->pending)	1621	if (w->pending)
1508	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	1622	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1509	}	1623	}
1510		1624
1511	static void noinline	1625	static void noinline
1512	verify_heap (EV_P_ ANHE *heap, int N)	1626	verify_heap (EV_P_ ANHE *heap, int N)
1513	{	1627	{
1514	int i;	1628	int i;
1515		1629
1516	for (i = HEAP0; i < N + HEAP0; ++i)	1630	for (i = HEAP0; i < N + HEAP0; ++i)
1517	{	1631	{
1518	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));	1632	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1519	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));	1633	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1520	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));	1634	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1521		1635
1522	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1636	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1523	}	1637	}
1524	}	1638	}
1525		1639
1526	static void noinline	1640	static void noinline
1527	array_verify (EV_P_ W *ws, int cnt)	1641	array_verify (EV_P_ W *ws, int cnt)
1528	{	1642	{
1529	while (cnt--)	1643	while (cnt--)
1530	{	1644	{
1531	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1645	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1532	verify_watcher (EV_A_ ws [cnt]);	1646	verify_watcher (EV_A_ ws [cnt]);
1533	}	1647	}
1534	}	1648	}
1535	#endif	1649	#endif
1536		1650
…		…
1543		1657
1544	assert (activecnt >= -1);	1658	assert (activecnt >= -1);
1545		1659
1546	assert (fdchangemax >= fdchangecnt);	1660	assert (fdchangemax >= fdchangecnt);
1547	for (i = 0; i < fdchangecnt; ++i)	1661	for (i = 0; i < fdchangecnt; ++i)
1548	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1662	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1549		1663
1550	assert (anfdmax >= 0);	1664	assert (anfdmax >= 0);
1551	for (i = 0; i < anfdmax; ++i)	1665	for (i = 0; i < anfdmax; ++i)
1552	for (w = anfds [i].head; w; w = w->next)	1666	for (w = anfds [i].head; w; w = w->next)
1553	{	1667	{
1554	verify_watcher (EV_A_ (W)w);	1668	verify_watcher (EV_A_ (W)w);
1555	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1669	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1556	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));	1670	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1557	}	1671	}
1558		1672
1559	assert (timermax >= timercnt);	1673	assert (timermax >= timercnt);
1560	verify_heap (EV_A_ timers, timercnt);	1674	verify_heap (EV_A_ timers, timercnt);
1561		1675
…		…
1638	{	1752	{
1639	#if EV_MULTIPLICITY	1753	#if EV_MULTIPLICITY
1640	struct ev_loop *loop = ev_default_loop_ptr;	1754	struct ev_loop *loop = ev_default_loop_ptr;
1641	#endif	1755	#endif
1642		1756
		1757	ev_default_loop_ptr = 0;
		1758
1643	#ifndef _WIN32	1759	#ifndef _WIN32
1644	ev_ref (EV_A); /* child watcher */	1760	ev_ref (EV_A); /* child watcher */
1645	ev_signal_stop (EV_A_ &childev);	1761	ev_signal_stop (EV_A_ &childev);
1646	#endif	1762	#endif
1647		1763
…		…
1653	{	1769	{
1654	#if EV_MULTIPLICITY	1770	#if EV_MULTIPLICITY
1655	struct ev_loop *loop = ev_default_loop_ptr;	1771	struct ev_loop *loop = ev_default_loop_ptr;
1656	#endif	1772	#endif
1657		1773
1658	if (backend)
1659	postfork = 1; /* must be in line with ev_loop_fork */	1774	postfork = 1; /* must be in line with ev_loop_fork */
1660	}	1775	}
1661		1776
1662	/*****************************************************************************/	1777	/*****************************************************************************/
1663		1778
1664	void	1779	void
1665	ev_invoke (EV_P_ void *w, int revents)	1780	ev_invoke (EV_P_ void *w, int revents)
1666	{	1781	{
1667	EV_CB_INVOKE ((W)w, revents);	1782	EV_CB_INVOKE ((W)w, revents);
1668	}	1783	}
1669		1784
1670	void inline_speed	1785	inline_speed void
1671	call_pending (EV_P)	1786	call_pending (EV_P)
1672	{	1787	{
1673	int pri;	1788	int pri;
1674		1789
1675	for (pri = NUMPRI; pri--; )	1790	for (pri = NUMPRI; pri--; )
1676	while (pendingcnt [pri])	1791	while (pendingcnt [pri])
1677	{	1792	{
1678	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1793	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1679		1794
1680	if (expect_true (p->w))
1681	{
1682	/*assert (("non-pending watcher on pending list", p->w->pending));*/	1795	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1796	/* ^ this is no longer true, as pending_w could be here */
1683		1797
1684	p->w->pending = 0;	1798	p->w->pending = 0;
1685	EV_CB_INVOKE (p->w, p->events);	1799	EV_CB_INVOKE (p->w, p->events);
1686	EV_FREQUENT_CHECK;	1800	EV_FREQUENT_CHECK;
1687	}
1688	}	1801	}
1689	}	1802	}
1690		1803
1691	#if EV_IDLE_ENABLE	1804	#if EV_IDLE_ENABLE
1692	void inline_size	1805	/* make idle watchers pending. this handles the "call-idle */
		1806	/* only when higher priorities are idle" logic */
		1807	inline_size void
1693	idle_reify (EV_P)	1808	idle_reify (EV_P)
1694	{	1809	{
1695	if (expect_false (idleall))	1810	if (expect_false (idleall))
1696	{	1811	{
1697	int pri;	1812	int pri;
…		…
1709	}	1824	}
1710	}	1825	}
1711	}	1826	}
1712	#endif	1827	#endif
1713		1828
1714	void inline_size	1829	/* make timers pending */
		1830	inline_size void
1715	timers_reify (EV_P)	1831	timers_reify (EV_P)
1716	{	1832	{
1717	EV_FREQUENT_CHECK;	1833	EV_FREQUENT_CHECK;
1718		1834
1719	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1835	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1720	{	1836	{
1721	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1837	do
1722
1723	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1724
1725	/* first reschedule or stop timer */
1726	if (w->repeat)
1727	{	1838	{
		1839	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1840
		1841	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1842
		1843	/* first reschedule or stop timer */
		1844	if (w->repeat)
		1845	{
1728	ev_at (w) += w->repeat;	1846	ev_at (w) += w->repeat;
1729	if (ev_at (w) < mn_now)	1847	if (ev_at (w) < mn_now)
1730	ev_at (w) = mn_now;	1848	ev_at (w) = mn_now;
1731		1849
1732	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1850	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1733		1851
1734	ANHE_at_cache (timers [HEAP0]);	1852	ANHE_at_cache (timers [HEAP0]);
1735	downheap (timers, timercnt, HEAP0);	1853	downheap (timers, timercnt, HEAP0);
		1854	}
		1855	else
		1856	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1857
		1858	EV_FREQUENT_CHECK;
		1859	feed_reverse (EV_A_ (W)w);
1736	}	1860	}
1737	else	1861	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1738	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1739		1862
1740	EV_FREQUENT_CHECK;
1741	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1863	feed_reverse_done (EV_A_ EV_TIMEOUT);
1742	}	1864	}
1743	}	1865	}
1744		1866
1745	#if EV_PERIODIC_ENABLE	1867	#if EV_PERIODIC_ENABLE
1746	void inline_size	1868	/* make periodics pending */
		1869	inline_size void
1747	periodics_reify (EV_P)	1870	periodics_reify (EV_P)
1748	{	1871	{
1749	EV_FREQUENT_CHECK;	1872	EV_FREQUENT_CHECK;
1750		1873
1751	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1874	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1752	{	1875	{
1753	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1876	int feed_count = 0;
1754		1877
1755	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1878	do
1756
1757	/* first reschedule or stop timer */
1758	if (w->reschedule_cb)
1759	{	1879	{
		1880	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1881
		1882	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		1883
		1884	/* first reschedule or stop timer */
		1885	if (w->reschedule_cb)
		1886	{
1760	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1887	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1761		1888
1762	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1889	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1763		1890
1764	ANHE_at_cache (periodics [HEAP0]);	1891	ANHE_at_cache (periodics [HEAP0]);
1765	downheap (periodics, periodiccnt, HEAP0);	1892	downheap (periodics, periodiccnt, HEAP0);
		1893	}
		1894	else if (w->interval)
		1895	{
		1896	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1897	/* if next trigger time is not sufficiently in the future, put it there */
		1898	/* this might happen because of floating point inexactness */
		1899	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1900	{
		1901	ev_at (w) += w->interval;
		1902
		1903	/* if interval is unreasonably low we might still have a time in the past */
		1904	/* so correct this. this will make the periodic very inexact, but the user */
		1905	/* has effectively asked to get triggered more often than possible */
		1906	if (ev_at (w) < ev_rt_now)
		1907	ev_at (w) = ev_rt_now;
		1908	}
		1909
		1910	ANHE_at_cache (periodics [HEAP0]);
		1911	downheap (periodics, periodiccnt, HEAP0);
		1912	}
		1913	else
		1914	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1915
		1916	EV_FREQUENT_CHECK;
		1917	feed_reverse (EV_A_ (W)w);
1766	}	1918	}
1767	else if (w->interval)	1919	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1768	{
1769	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1770	/* if next trigger time is not sufficiently in the future, put it there */
1771	/* this might happen because of floating point inexactness */
1772	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1773	{
1774	ev_at (w) += w->interval;
1775		1920
1776	/* if interval is unreasonably low we might still have a time in the past */
1777	/* so correct this. this will make the periodic very inexact, but the user */
1778	/* has effectively asked to get triggered more often than possible */
1779	if (ev_at (w) < ev_rt_now)
1780	ev_at (w) = ev_rt_now;
1781	}
1782
1783	ANHE_at_cache (periodics [HEAP0]);
1784	downheap (periodics, periodiccnt, HEAP0);
1785	}
1786	else
1787	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1788
1789	EV_FREQUENT_CHECK;
1790	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1921	feed_reverse_done (EV_A_ EV_PERIODIC);
1791	}	1922	}
1792	}	1923	}
1793		1924
		1925	/* simply recalculate all periodics */
		1926	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1794	static void noinline	1927	static void noinline
1795	periodics_reschedule (EV_P)	1928	periodics_reschedule (EV_P)
1796	{	1929	{
1797	int i;	1930	int i;
1798		1931
…		…
1811		1944
1812	reheap (periodics, periodiccnt);	1945	reheap (periodics, periodiccnt);
1813	}	1946	}
1814	#endif	1947	#endif
1815		1948
1816	void inline_speed	1949	/* adjust all timers by a given offset */
		1950	static void noinline
		1951	timers_reschedule (EV_P_ ev_tstamp adjust)
		1952	{
		1953	int i;
		1954
		1955	for (i = 0; i < timercnt; ++i)
		1956	{
		1957	ANHE *he = timers + i + HEAP0;
		1958	ANHE_w (*he)->at += adjust;
		1959	ANHE_at_cache (*he);
		1960	}
		1961	}
		1962
		1963	/* fetch new monotonic and realtime times from the kernel */
		1964	/* also detetc if there was a timejump, and act accordingly */
		1965	inline_speed void
1817	time_update (EV_P_ ev_tstamp max_block)	1966	time_update (EV_P_ ev_tstamp max_block)
1818	{	1967	{
1819	int i;
1820
1821	#if EV_USE_MONOTONIC	1968	#if EV_USE_MONOTONIC
1822	if (expect_true (have_monotonic))	1969	if (expect_true (have_monotonic))
1823	{	1970	{
		1971	int i;
1824	ev_tstamp odiff = rtmn_diff;	1972	ev_tstamp odiff = rtmn_diff;
1825		1973
1826	mn_now = get_clock ();	1974	mn_now = get_clock ();
1827		1975
1828	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	1976	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1854	ev_rt_now = ev_time ();	2002	ev_rt_now = ev_time ();
1855	mn_now = get_clock ();	2003	mn_now = get_clock ();
1856	now_floor = mn_now;	2004	now_floor = mn_now;
1857	}	2005	}
1858		2006
		2007	/* no timer adjustment, as the monotonic clock doesn't jump */
		2008	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1859	# if EV_PERIODIC_ENABLE	2009	# if EV_PERIODIC_ENABLE
1860	periodics_reschedule (EV_A);	2010	periodics_reschedule (EV_A);
1861	# endif	2011	# endif
1862	/* no timer adjustment, as the monotonic clock doesn't jump */
1863	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1864	}	2012	}
1865	else	2013	else
1866	#endif	2014	#endif
1867	{	2015	{
1868	ev_rt_now = ev_time ();	2016	ev_rt_now = ev_time ();
1869		2017
1870	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2018	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1871	{	2019	{
		2020	/* adjust timers. this is easy, as the offset is the same for all of them */
		2021	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1872	#if EV_PERIODIC_ENABLE	2022	#if EV_PERIODIC_ENABLE
1873	periodics_reschedule (EV_A);	2023	periodics_reschedule (EV_A);
1874	#endif	2024	#endif
1875	/* adjust timers. this is easy, as the offset is the same for all of them */
1876	for (i = 0; i < timercnt; ++i)
1877	{
1878	ANHE *he = timers + i + HEAP0;
1879	ANHE_w (*he)->at += ev_rt_now - mn_now;
1880	ANHE_at_cache (*he);
1881	}
1882	}	2025	}
1883		2026
1884	mn_now = ev_rt_now;	2027	mn_now = ev_rt_now;
1885	}	2028	}
1886	}	2029	}
1887		2030
1888	void	2031	void
1889	ev_ref (EV_P)
1890	{
1891	++activecnt;
1892	}
1893
1894	void
1895	ev_unref (EV_P)
1896	{
1897	--activecnt;
1898	}
1899
1900	void
1901	ev_now_update (EV_P)
1902	{
1903	time_update (EV_A_ 1e100);
1904	}
1905
1906	static int loop_done;
1907
1908	void
1909	ev_loop (EV_P_ int flags)	2032	ev_loop (EV_P_ int flags)
1910	{	2033	{
		2034	++loop_depth;
		2035
1911	loop_done = EVUNLOOP_CANCEL;	2036	loop_done = EVUNLOOP_CANCEL;
1912		2037
1913	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2038	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1914		2039
1915	do	2040	do
…		…
1942	{	2067	{
1943	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2068	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1944	call_pending (EV_A);	2069	call_pending (EV_A);
1945	}	2070	}
1946		2071
1947	if (expect_false (!activecnt))
1948	break;
1949
1950	/* we might have forked, so reify kernel state if necessary */	2072	/* we might have forked, so reify kernel state if necessary */
1951	if (expect_false (postfork))	2073	if (expect_false (postfork))
1952	loop_fork (EV_A);	2074	loop_fork (EV_A);
1953		2075
1954	/* update fd-related kernel structures */	2076	/* update fd-related kernel structures */
…		…
1959	ev_tstamp waittime = 0.;	2081	ev_tstamp waittime = 0.;
1960	ev_tstamp sleeptime = 0.;	2082	ev_tstamp sleeptime = 0.;
1961		2083
1962	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2084	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1963	{	2085	{
		2086	/* remember old timestamp for io_blocktime calculation */
		2087	ev_tstamp prev_mn_now = mn_now;
		2088
1964	/* update time to cancel out callback processing overhead */	2089	/* update time to cancel out callback processing overhead */
1965	time_update (EV_A_ 1e100);	2090	time_update (EV_A_ 1e100);
1966		2091
1967	waittime = MAX_BLOCKTIME;	2092	waittime = MAX_BLOCKTIME;
1968		2093
…		…
1978	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2103	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1979	if (waittime > to) waittime = to;	2104	if (waittime > to) waittime = to;
1980	}	2105	}
1981	#endif	2106	#endif
1982		2107
		2108	/* don't let timeouts decrease the waittime below timeout_blocktime */
1983	if (expect_false (waittime < timeout_blocktime))	2109	if (expect_false (waittime < timeout_blocktime))
1984	waittime = timeout_blocktime;	2110	waittime = timeout_blocktime;
1985		2111
1986	sleeptime = waittime - backend_fudge;	2112	/* extra check because io_blocktime is commonly 0 */
1987
1988	if (expect_true (sleeptime > io_blocktime))	2113	if (expect_false (io_blocktime))
1989	sleeptime = io_blocktime;
1990
1991	if (sleeptime)
1992	{	2114	{
		2115	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2116
		2117	if (sleeptime > waittime - backend_fudge)
		2118	sleeptime = waittime - backend_fudge;
		2119
		2120	if (expect_true (sleeptime > 0.))
		2121	{
1993	ev_sleep (sleeptime);	2122	ev_sleep (sleeptime);
1994	waittime -= sleeptime;	2123	waittime -= sleeptime;
		2124	}
1995	}	2125	}
1996	}	2126	}
1997		2127
1998	++loop_count;	2128	++loop_count;
1999	backend_poll (EV_A_ waittime);	2129	backend_poll (EV_A_ waittime);
…		…
2025	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2155	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2026	));	2156	));
2027		2157
2028	if (loop_done == EVUNLOOP_ONE)	2158	if (loop_done == EVUNLOOP_ONE)
2029	loop_done = EVUNLOOP_CANCEL;	2159	loop_done = EVUNLOOP_CANCEL;
		2160
		2161	--loop_depth;
2030	}	2162	}
2031		2163
2032	void	2164	void
2033	ev_unloop (EV_P_ int how)	2165	ev_unloop (EV_P_ int how)
2034	{	2166	{
2035	loop_done = how;	2167	loop_done = how;
2036	}	2168	}
2037		2169
		2170	void
		2171	ev_ref (EV_P)
		2172	{
		2173	++activecnt;
		2174	}
		2175
		2176	void
		2177	ev_unref (EV_P)
		2178	{
		2179	--activecnt;
		2180	}
		2181
		2182	void
		2183	ev_now_update (EV_P)
		2184	{
		2185	time_update (EV_A_ 1e100);
		2186	}
		2187
		2188	void
		2189	ev_suspend (EV_P)
		2190	{
		2191	ev_now_update (EV_A);
		2192	}
		2193
		2194	void
		2195	ev_resume (EV_P)
		2196	{
		2197	ev_tstamp mn_prev = mn_now;
		2198
		2199	ev_now_update (EV_A);
		2200	timers_reschedule (EV_A_ mn_now - mn_prev);
		2201	#if EV_PERIODIC_ENABLE
		2202	/* TODO: really do this? */
		2203	periodics_reschedule (EV_A);
		2204	#endif
		2205	}
		2206
2038	/*****************************************************************************/	2207	/*****************************************************************************/
		2208	/* singly-linked list management, used when the expected list length is short */
2039		2209
2040	void inline_size	2210	inline_size void
2041	wlist_add (WL *head, WL elem)	2211	wlist_add (WL *head, WL elem)
2042	{	2212	{
2043	elem->next = *head;	2213	elem->next = *head;
2044	*head = elem;	2214	*head = elem;
2045	}	2215	}
2046		2216
2047	void inline_size	2217	inline_size void
2048	wlist_del (WL *head, WL elem)	2218	wlist_del (WL *head, WL elem)
2049	{	2219	{
2050	while (*head)	2220	while (*head)
2051	{	2221	{
2052	if (*head == elem)	2222	if (*head == elem)
…		…
2057		2227
2058	head = &(*head)->next;	2228	head = &(*head)->next;
2059	}	2229	}
2060	}	2230	}
2061		2231
2062	void inline_speed	2232	/* internal, faster, version of ev_clear_pending */
		2233	inline_speed void
2063	clear_pending (EV_P_ W w)	2234	clear_pending (EV_P_ W w)
2064	{	2235	{
2065	if (w->pending)	2236	if (w->pending)
2066	{	2237	{
2067	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2238	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2068	w->pending = 0;	2239	w->pending = 0;
2069	}	2240	}
2070	}	2241	}
2071		2242
2072	int	2243	int
…		…
2076	int pending = w_->pending;	2247	int pending = w_->pending;
2077		2248
2078	if (expect_true (pending))	2249	if (expect_true (pending))
2079	{	2250	{
2080	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2251	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2252	p->w = (W)&pending_w;
2081	w_->pending = 0;	2253	w_->pending = 0;
2082	p->w = 0;
2083	return p->events;	2254	return p->events;
2084	}	2255	}
2085	else	2256	else
2086	return 0;	2257	return 0;
2087	}	2258	}
2088		2259
2089	void inline_size	2260	inline_size void
2090	pri_adjust (EV_P_ W w)	2261	pri_adjust (EV_P_ W w)
2091	{	2262	{
2092	int pri = w->priority;	2263	int pri = w->priority;
2093	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2264	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2094	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2265	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2095	w->priority = pri;	2266	w->priority = pri;
2096	}	2267	}
2097		2268
2098	void inline_speed	2269	inline_speed void
2099	ev_start (EV_P_ W w, int active)	2270	ev_start (EV_P_ W w, int active)
2100	{	2271	{
2101	pri_adjust (EV_A_ w);	2272	pri_adjust (EV_A_ w);
2102	w->active = active;	2273	w->active = active;
2103	ev_ref (EV_A);	2274	ev_ref (EV_A);
2104	}	2275	}
2105		2276
2106	void inline_size	2277	inline_size void
2107	ev_stop (EV_P_ W w)	2278	ev_stop (EV_P_ W w)
2108	{	2279	{
2109	ev_unref (EV_A);	2280	ev_unref (EV_A);
2110	w->active = 0;	2281	w->active = 0;
2111	}	2282	}
…		…
2118	int fd = w->fd;	2289	int fd = w->fd;
2119		2290
2120	if (expect_false (ev_is_active (w)))	2291	if (expect_false (ev_is_active (w)))
2121	return;	2292	return;
2122		2293
2123	assert (("ev_io_start called with negative fd", fd >= 0));	2294	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2124	assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));	2295	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2125		2296
2126	EV_FREQUENT_CHECK;	2297	EV_FREQUENT_CHECK;
2127		2298
2128	ev_start (EV_A_ (W)w, 1);	2299	ev_start (EV_A_ (W)w, 1);
2129	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2300	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2130	wlist_add (&anfds[fd].head, (WL)w);	2301	wlist_add (&anfds[fd].head, (WL)w);
2131		2302
2132	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2303	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2133	w->events &= ~EV_IOFDSET;	2304	w->events &= ~EV__IOFDSET;
2134		2305
2135	EV_FREQUENT_CHECK;	2306	EV_FREQUENT_CHECK;
2136	}	2307	}
2137		2308
2138	void noinline	2309	void noinline
…		…
2140	{	2311	{
2141	clear_pending (EV_A_ (W)w);	2312	clear_pending (EV_A_ (W)w);
2142	if (expect_false (!ev_is_active (w)))	2313	if (expect_false (!ev_is_active (w)))
2143	return;	2314	return;
2144		2315
2145	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2316	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2146		2317
2147	EV_FREQUENT_CHECK;	2318	EV_FREQUENT_CHECK;
2148		2319
2149	wlist_del (&anfds[w->fd].head, (WL)w);	2320	wlist_del (&anfds[w->fd].head, (WL)w);
2150	ev_stop (EV_A_ (W)w);	2321	ev_stop (EV_A_ (W)w);
…		…
2160	if (expect_false (ev_is_active (w)))	2331	if (expect_false (ev_is_active (w)))
2161	return;	2332	return;
2162		2333
2163	ev_at (w) += mn_now;	2334	ev_at (w) += mn_now;
2164		2335
2165	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2336	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2166		2337
2167	EV_FREQUENT_CHECK;	2338	EV_FREQUENT_CHECK;
2168		2339
2169	++timercnt;	2340	++timercnt;
2170	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2341	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2173	ANHE_at_cache (timers [ev_active (w)]);	2344	ANHE_at_cache (timers [ev_active (w)]);
2174	upheap (timers, ev_active (w));	2345	upheap (timers, ev_active (w));
2175		2346
2176	EV_FREQUENT_CHECK;	2347	EV_FREQUENT_CHECK;
2177		2348
2178	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2349	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2179	}	2350	}
2180		2351
2181	void noinline	2352	void noinline
2182	ev_timer_stop (EV_P_ ev_timer *w)	2353	ev_timer_stop (EV_P_ ev_timer *w)
2183	{	2354	{
…		…
2188	EV_FREQUENT_CHECK;	2359	EV_FREQUENT_CHECK;
2189		2360
2190	{	2361	{
2191	int active = ev_active (w);	2362	int active = ev_active (w);
2192		2363
2193	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2364	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2194		2365
2195	--timercnt;	2366	--timercnt;
2196		2367
2197	if (expect_true (active < timercnt + HEAP0))	2368	if (expect_true (active < timercnt + HEAP0))
2198	{	2369	{
…		…
2242		2413
2243	if (w->reschedule_cb)	2414	if (w->reschedule_cb)
2244	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2415	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2245	else if (w->interval)	2416	else if (w->interval)
2246	{	2417	{
2247	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2418	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2248	/* this formula differs from the one in periodic_reify because we do not always round up */	2419	/* this formula differs from the one in periodic_reify because we do not always round up */
2249	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2420	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2250	}	2421	}
2251	else	2422	else
2252	ev_at (w) = w->offset;	2423	ev_at (w) = w->offset;
…		…
2260	ANHE_at_cache (periodics [ev_active (w)]);	2431	ANHE_at_cache (periodics [ev_active (w)]);
2261	upheap (periodics, ev_active (w));	2432	upheap (periodics, ev_active (w));
2262		2433
2263	EV_FREQUENT_CHECK;	2434	EV_FREQUENT_CHECK;
2264		2435
2265	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2436	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2266	}	2437	}
2267		2438
2268	void noinline	2439	void noinline
2269	ev_periodic_stop (EV_P_ ev_periodic *w)	2440	ev_periodic_stop (EV_P_ ev_periodic *w)
2270	{	2441	{
…		…
2275	EV_FREQUENT_CHECK;	2446	EV_FREQUENT_CHECK;
2276		2447
2277	{	2448	{
2278	int active = ev_active (w);	2449	int active = ev_active (w);
2279		2450
2280	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2451	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2281		2452
2282	--periodiccnt;	2453	--periodiccnt;
2283		2454
2284	if (expect_true (active < periodiccnt + HEAP0))	2455	if (expect_true (active < periodiccnt + HEAP0))
2285	{	2456	{
…		…
2308		2479
2309	void noinline	2480	void noinline
2310	ev_signal_start (EV_P_ ev_signal *w)	2481	ev_signal_start (EV_P_ ev_signal *w)
2311	{	2482	{
2312	#if EV_MULTIPLICITY	2483	#if EV_MULTIPLICITY
2313	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2484	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2314	#endif	2485	#endif
2315	if (expect_false (ev_is_active (w)))	2486	if (expect_false (ev_is_active (w)))
2316	return;	2487	return;
2317		2488
2318	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2489	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2319		2490
2320	evpipe_init (EV_A);	2491	evpipe_init (EV_A);
2321		2492
2322	EV_FREQUENT_CHECK;	2493	EV_FREQUENT_CHECK;
2323		2494
…		…
2374		2545
2375	void	2546	void
2376	ev_child_start (EV_P_ ev_child *w)	2547	ev_child_start (EV_P_ ev_child *w)
2377	{	2548	{
2378	#if EV_MULTIPLICITY	2549	#if EV_MULTIPLICITY
2379	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2550	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2380	#endif	2551	#endif
2381	if (expect_false (ev_is_active (w)))	2552	if (expect_false (ev_is_active (w)))
2382	return;	2553	return;
2383		2554
2384	EV_FREQUENT_CHECK;	2555	EV_FREQUENT_CHECK;
…		…
2409	# ifdef _WIN32	2580	# ifdef _WIN32
2410	# undef lstat	2581	# undef lstat
2411	# define lstat(a,b) _stati64 (a,b)	2582	# define lstat(a,b) _stati64 (a,b)
2412	# endif	2583	# endif
2413		2584
2414	#define DEF_STAT_INTERVAL 5.0074891	2585	#define DEF_STAT_INTERVAL 5.0074891
		2586	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2415	#define MIN_STAT_INTERVAL 0.1074891	2587	#define MIN_STAT_INTERVAL 0.1074891
2416		2588
2417	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2589	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2418		2590
2419	#if EV_USE_INOTIFY	2591	#if EV_USE_INOTIFY
2420	# define EV_INOTIFY_BUFSIZE 8192	2592	# define EV_INOTIFY_BUFSIZE 8192
…		…
2424	{	2596	{
2425	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);	2597	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);
2426		2598
2427	if (w->wd < 0)	2599	if (w->wd < 0)
2428	{	2600	{
		2601	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2429	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2602	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2430		2603
2431	/* monitor some parent directory for speedup hints */	2604	/* monitor some parent directory for speedup hints */
2432	/* note that exceeding the hardcoded limit is not a correctness issue, */	2605	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2433	/* but an efficiency issue only */	2606	/* but an efficiency issue only */
2434	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2607	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2435	{	2608	{
2436	char path [4096];	2609	char path [4096];
2437	strcpy (path, w->path);	2610	strcpy (path, w->path);
…		…
2441	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2614	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2442	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2615	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2443		2616
2444	char *pend = strrchr (path, '/');	2617	char *pend = strrchr (path, '/');
2445		2618
2446	if (!pend)	2619	if (!pend || pend == path)
2447	break; /* whoops, no '/', complain to your admin */	2620	break;
2448		2621
2449	*pend = 0;	2622	*pend = 0;
2450	w->wd = inotify_add_watch (fs_fd, path, mask);	2623	w->wd = inotify_add_watch (fs_fd, path, mask);
2451	}	2624	}
2452	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2625	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2453	}	2626	}
2454	}	2627	}
2455	else
2456	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2457		2628
2458	if (w->wd >= 0)	2629	if (w->wd >= 0)
		2630	{
2459	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2631	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2632
		2633	/* now local changes will be tracked by inotify, but remote changes won't */
		2634	/* unless the filesystem it known to be local, we therefore still poll */
		2635	/* also do poll on <2.6.25, but with normal frequency */
		2636	struct statfs sfs;
		2637
		2638	if (fs_2625 && !statfs (w->path, &sfs))
		2639	if (sfs.f_type == 0x1373 /* devfs */
		2640	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2641	|| sfs.f_type == 0x3153464a /* jfs */
		2642	|| sfs.f_type == 0x52654973 /* reiser3 */
		2643	|| sfs.f_type == 0x01021994 /* tempfs */
		2644	|| sfs.f_type == 0x58465342 /* xfs */)
		2645	return;
		2646
		2647	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2648	ev_timer_again (EV_A_ &w->timer);
		2649	}
2460	}	2650	}
2461		2651
2462	static void noinline	2652	static void noinline
2463	infy_del (EV_P_ ev_stat *w)	2653	infy_del (EV_P_ ev_stat *w)
2464	{	2654	{
…		…
2494		2684
2495	if (w->wd == wd || wd == -1)	2685	if (w->wd == wd || wd == -1)
2496	{	2686	{
2497	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2687	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2498	{	2688	{
		2689	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2499	w->wd = -1;	2690	w->wd = -1;
2500	infy_add (EV_A_ w); /* re-add, no matter what */	2691	infy_add (EV_A_ w); /* re-add, no matter what */
2501	}	2692	}
2502		2693
2503	stat_timer_cb (EV_A_ &w->timer, 0);	2694	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2516		2707
2517	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2708	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2518	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2709	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2519	}	2710	}
2520		2711
2521	void inline_size	2712	inline_size void
2522	infy_init (EV_P)	2713	check_2625 (EV_P)
2523	{	2714	{
2524	if (fs_fd != -2)
2525	return;
2526
2527	/* kernels < 2.6.25 are borked	2715	/* kernels < 2.6.25 are borked
2528	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2716	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2529	*/	2717	*/
2530	{
2531	struct utsname buf;	2718	struct utsname buf;
2532	int major, minor, micro;	2719	int major, minor, micro;
2533		2720
2534	fs_fd = -1;
2535
2536	if (uname (&buf))	2721	if (uname (&buf))
2537	return;	2722	return;
2538		2723
2539	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2724	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2540	return;	2725	return;
2541		2726
2542	if (major < 2	2727	if (major < 2
2543	|| (major == 2 && minor < 6)	2728	|| (major == 2 && minor < 6)
2544	|| (major == 2 && minor == 6 && micro < 25))	2729	|| (major == 2 && minor == 6 && micro < 25))
2545	return;	2730	return;
2546	}	2731
		2732	fs_2625 = 1;
		2733	}
		2734
		2735	inline_size void
		2736	infy_init (EV_P)
		2737	{
		2738	if (fs_fd != -2)
		2739	return;
		2740
		2741	fs_fd = -1;
		2742
		2743	check_2625 (EV_A);
2547		2744
2548	fs_fd = inotify_init ();	2745	fs_fd = inotify_init ();
2549		2746
2550	if (fs_fd >= 0)	2747	if (fs_fd >= 0)
2551	{	2748	{
…		…
2553	ev_set_priority (&fs_w, EV_MAXPRI);	2750	ev_set_priority (&fs_w, EV_MAXPRI);
2554	ev_io_start (EV_A_ &fs_w);	2751	ev_io_start (EV_A_ &fs_w);
2555	}	2752	}
2556	}	2753	}
2557		2754
2558	void inline_size	2755	inline_size void
2559	infy_fork (EV_P)	2756	infy_fork (EV_P)
2560	{	2757	{
2561	int slot;	2758	int slot;
2562		2759
2563	if (fs_fd < 0)	2760	if (fs_fd < 0)
…		…
2579	w->wd = -1;	2776	w->wd = -1;
2580		2777
2581	if (fs_fd >= 0)	2778	if (fs_fd >= 0)
2582	infy_add (EV_A_ w); /* re-add, no matter what */	2779	infy_add (EV_A_ w); /* re-add, no matter what */
2583	else	2780	else
2584	ev_timer_start (EV_A_ &w->timer);	2781	ev_timer_again (EV_A_ &w->timer);
2585	}	2782	}
2586	}	2783	}
2587	}	2784	}
2588		2785
2589	#endif	2786	#endif
…		…
2644	ev_stat_start (EV_P_ ev_stat *w)	2841	ev_stat_start (EV_P_ ev_stat *w)
2645	{	2842	{
2646	if (expect_false (ev_is_active (w)))	2843	if (expect_false (ev_is_active (w)))
2647	return;	2844	return;
2648		2845
2649	/* since we use memcmp, we need to clear any padding data etc. */
2650	memset (&w->prev, 0, sizeof (ev_statdata));
2651	memset (&w->attr, 0, sizeof (ev_statdata));
2652
2653	ev_stat_stat (EV_A_ w);	2846	ev_stat_stat (EV_A_ w);
2654		2847
		2848	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2655	if (w->interval < MIN_STAT_INTERVAL)	2849	w->interval = MIN_STAT_INTERVAL;
2656	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2657		2850
2658	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2851	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2659	ev_set_priority (&w->timer, ev_priority (w));	2852	ev_set_priority (&w->timer, ev_priority (w));
2660		2853
2661	#if EV_USE_INOTIFY	2854	#if EV_USE_INOTIFY
2662	infy_init (EV_A);	2855	infy_init (EV_A);
2663		2856
2664	if (fs_fd >= 0)	2857	if (fs_fd >= 0)
2665	infy_add (EV_A_ w);	2858	infy_add (EV_A_ w);
2666	else	2859	else
2667	#endif	2860	#endif
2668	ev_timer_start (EV_A_ &w->timer);	2861	ev_timer_again (EV_A_ &w->timer);
2669		2862
2670	ev_start (EV_A_ (W)w, 1);	2863	ev_start (EV_A_ (W)w, 1);
2671		2864
2672	EV_FREQUENT_CHECK;	2865	EV_FREQUENT_CHECK;
2673	}	2866	}
…		…
2848	static void	3041	static void
2849	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3042	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2850	{	3043	{
2851	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3044	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2852		3045
		3046	ev_embed_stop (EV_A_ w);
		3047
2853	{	3048	{
2854	struct ev_loop *loop = w->other;	3049	struct ev_loop *loop = w->other;
2855		3050
2856	ev_loop_fork (EV_A);	3051	ev_loop_fork (EV_A);
		3052	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2857	}	3053	}
		3054
		3055	ev_embed_start (EV_A_ w);
2858	}	3056	}
2859		3057
2860	#if 0	3058	#if 0
2861	static void	3059	static void
2862	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3060	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2871	if (expect_false (ev_is_active (w)))	3069	if (expect_false (ev_is_active (w)))
2872	return;	3070	return;
2873		3071
2874	{	3072	{
2875	struct ev_loop *loop = w->other;	3073	struct ev_loop *loop = w->other;
2876	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3074	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2877	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3075	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2878	}	3076	}
2879		3077
2880	EV_FREQUENT_CHECK;	3078	EV_FREQUENT_CHECK;
2881		3079
…		…
3064	ev_timer_set (&once->to, timeout, 0.);	3262	ev_timer_set (&once->to, timeout, 0.);
3065	ev_timer_start (EV_A_ &once->to);	3263	ev_timer_start (EV_A_ &once->to);
3066	}	3264	}
3067	}	3265	}
3068		3266
		3267	/*****************************************************************************/
		3268
		3269	#if EV_WALK_ENABLE
		3270	void
		3271	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3272	{
		3273	int i, j;
		3274	ev_watcher_list *wl, *wn;
		3275
		3276	if (types & (EV_IO | EV_EMBED))
		3277	for (i = 0; i < anfdmax; ++i)
		3278	for (wl = anfds [i].head; wl; )
		3279	{
		3280	wn = wl->next;
		3281
		3282	#if EV_EMBED_ENABLE
		3283	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3284	{
		3285	if (types & EV_EMBED)
		3286	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3287	}
		3288	else
		3289	#endif
		3290	#if EV_USE_INOTIFY
		3291	if (ev_cb ((ev_io *)wl) == infy_cb)
		3292	;
		3293	else
		3294	#endif
		3295	if ((ev_io *)wl != &pipe_w)
		3296	if (types & EV_IO)
		3297	cb (EV_A_ EV_IO, wl);
		3298
		3299	wl = wn;
		3300	}
		3301
		3302	if (types & (EV_TIMER | EV_STAT))
		3303	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3304	#if EV_STAT_ENABLE
		3305	/*TODO: timer is not always active*/
		3306	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3307	{
		3308	if (types & EV_STAT)
		3309	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3310	}
		3311	else
		3312	#endif
		3313	if (types & EV_TIMER)
		3314	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3315
		3316	#if EV_PERIODIC_ENABLE
		3317	if (types & EV_PERIODIC)
		3318	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3319	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3320	#endif
		3321
		3322	#if EV_IDLE_ENABLE
		3323	if (types & EV_IDLE)
		3324	for (j = NUMPRI; i--; )
		3325	for (i = idlecnt [j]; i--; )
		3326	cb (EV_A_ EV_IDLE, idles [j][i]);
		3327	#endif
		3328
		3329	#if EV_FORK_ENABLE
		3330	if (types & EV_FORK)
		3331	for (i = forkcnt; i--; )
		3332	if (ev_cb (forks [i]) != embed_fork_cb)
		3333	cb (EV_A_ EV_FORK, forks [i]);
		3334	#endif
		3335
		3336	#if EV_ASYNC_ENABLE
		3337	if (types & EV_ASYNC)
		3338	for (i = asynccnt; i--; )
		3339	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3340	#endif
		3341
		3342	if (types & EV_PREPARE)
		3343	for (i = preparecnt; i--; )
		3344	#if EV_EMBED_ENABLE
		3345	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3346	#endif
		3347	cb (EV_A_ EV_PREPARE, prepares [i]);
		3348
		3349	if (types & EV_CHECK)
		3350	for (i = checkcnt; i--; )
		3351	cb (EV_A_ EV_CHECK, checks [i]);
		3352
		3353	if (types & EV_SIGNAL)
		3354	for (i = 0; i < signalmax; ++i)
		3355	for (wl = signals [i].head; wl; )
		3356	{
		3357	wn = wl->next;
		3358	cb (EV_A_ EV_SIGNAL, wl);
		3359	wl = wn;
		3360	}
		3361
		3362	if (types & EV_CHILD)
		3363	for (i = EV_PID_HASHSIZE; i--; )
		3364	for (wl = childs [i]; wl; )
		3365	{
		3366	wn = wl->next;
		3367	cb (EV_A_ EV_CHILD, wl);
		3368	wl = wn;
		3369	}
		3370	/* EV_STAT 0x00001000 /* stat data changed */
		3371	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3372	}
		3373	#endif
		3374
3069	#if EV_MULTIPLICITY	3375	#if EV_MULTIPLICITY
3070	#include "ev_wrap.h"	3376	#include "ev_wrap.h"
3071	#endif	3377	#endif
3072		3378
3073	#ifdef __cplusplus	3379	#ifdef __cplusplus

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