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Comparing libev/ev.c (file contents):
Revision 1.270 by root, Thu Oct 30 13:07:10 2008 UTC vs.
Revision 1.304 by root, Sun Jul 19 03:12:28 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
…		…
119	# else	133	# else
120	# define EV_USE_INOTIFY 0	134	# define EV_USE_INOTIFY 0
121	# endif	135	# endif
122	# endif	136	# endif
123		137
		138	# ifndef EV_USE_SIGNALFD
		139	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
		140	# define EV_USE_SIGNALFD 1
		141	# else
		142	# define EV_USE_SIGNALFD 0
		143	# endif
		144	# endif
		145
124	# ifndef EV_USE_EVENTFD	146	# ifndef EV_USE_EVENTFD
125	# if HAVE_EVENTFD	147	# if HAVE_EVENTFD
126	# define EV_USE_EVENTFD 1	148	# define EV_USE_EVENTFD 1
127	# else	149	# else
128	# define EV_USE_EVENTFD 0	150	# define EV_USE_EVENTFD 0
…		…
164	# endif	186	# endif
165	#endif	187	#endif
166		188
167	/* this block tries to deduce configuration from header-defined symbols and defaults */	189	/* this block tries to deduce configuration from header-defined symbols and defaults */
168		190
		191	#ifndef EV_USE_CLOCK_SYSCALL
		192	# if __linux && __GLIBC__ >= 2
		193	# define EV_USE_CLOCK_SYSCALL 1
		194	# else
		195	# define EV_USE_CLOCK_SYSCALL 0
		196	# endif
		197	#endif
		198
169	#ifndef EV_USE_MONOTONIC	199	#ifndef EV_USE_MONOTONIC
170	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0	200	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171	# define EV_USE_MONOTONIC 1	201	# define EV_USE_MONOTONIC 1
172	# else	202	# else
173	# define EV_USE_MONOTONIC 0	203	# define EV_USE_MONOTONIC 0
174	# endif	204	# endif
175	#endif	205	#endif
176		206
177	#ifndef EV_USE_REALTIME	207	#ifndef EV_USE_REALTIME
178	# define EV_USE_REALTIME 0	208	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
179	#endif	209	#endif
180		210
181	#ifndef EV_USE_NANOSLEEP	211	#ifndef EV_USE_NANOSLEEP
182	# if _POSIX_C_SOURCE >= 199309L	212	# if _POSIX_C_SOURCE >= 199309L
183	# define EV_USE_NANOSLEEP 1	213	# define EV_USE_NANOSLEEP 1
…		…
244	# else	274	# else
245	# define EV_USE_EVENTFD 0	275	# define EV_USE_EVENTFD 0
246	# endif	276	# endif
247	#endif	277	#endif
248		278
		279	#ifndef EV_USE_SIGNALFD
		280	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9))
		281	# define EV_USE_SIGNALFD 1
		282	# else
		283	# define EV_USE_SIGNALFD 0
		284	# endif
		285	#endif
		286
249	#if 0 /* debugging */	287	#if 0 /* debugging */
250	# define EV_VERIFY 3	288	# define EV_VERIFY 3
251	# define EV_USE_4HEAP 1	289	# define EV_USE_4HEAP 1
252	# define EV_HEAP_CACHE_AT 1	290	# define EV_HEAP_CACHE_AT 1
253	#endif	291	#endif
…		…
262		300
263	#ifndef EV_HEAP_CACHE_AT	301	#ifndef EV_HEAP_CACHE_AT
264	# define EV_HEAP_CACHE_AT !EV_MINIMAL	302	# define EV_HEAP_CACHE_AT !EV_MINIMAL
265	#endif	303	#endif
266		304
		305	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		306	/* which makes programs even slower. might work on other unices, too. */
		307	#if EV_USE_CLOCK_SYSCALL
		308	# include <syscall.h>
		309	# ifdef SYS_clock_gettime
		310	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		311	# undef EV_USE_MONOTONIC
		312	# define EV_USE_MONOTONIC 1
		313	# else
		314	# undef EV_USE_CLOCK_SYSCALL
		315	# define EV_USE_CLOCK_SYSCALL 0
		316	# endif
		317	#endif
		318
267	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	319	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
268		320
269	#ifndef CLOCK_MONOTONIC	321	#ifndef CLOCK_MONOTONIC
270	# undef EV_USE_MONOTONIC	322	# undef EV_USE_MONOTONIC
271	# define EV_USE_MONOTONIC 0	323	# define EV_USE_MONOTONIC 0
…		…
287	# endif	339	# endif
288	#endif	340	#endif
289		341
290	#if EV_USE_INOTIFY	342	#if EV_USE_INOTIFY
291	# include <sys/utsname.h>	343	# include <sys/utsname.h>
		344	# include <sys/statfs.h>
292	# include <sys/inotify.h>	345	# include <sys/inotify.h>
293	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */	346	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294	# ifndef IN_DONT_FOLLOW	347	# ifndef IN_DONT_FOLLOW
295	# undef EV_USE_INOTIFY	348	# undef EV_USE_INOTIFY
296	# define EV_USE_INOTIFY 0	349	# define EV_USE_INOTIFY 0
…		…
302	#endif	355	#endif
303		356
304	#if EV_USE_EVENTFD	357	#if EV_USE_EVENTFD
305	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	358	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306	# include <stdint.h>	359	# include <stdint.h>
		360	# ifndef EFD_NONBLOCK
		361	# define EFD_NONBLOCK O_NONBLOCK
		362	# endif
		363	# ifndef EFD_CLOEXEC
		364	# define EFD_CLOEXEC O_CLOEXEC
		365	# endif
307	# ifdef __cplusplus	366	# ifdef __cplusplus
308	extern "C" {	367	extern "C" {
309	# endif	368	# endif
310	int eventfd (unsigned int initval, int flags);	369	int eventfd (unsigned int initval, int flags);
311	# ifdef __cplusplus	370	# ifdef __cplusplus
312	}	371	}
313	# endif	372	# endif
		373	#endif
		374
		375	#if EV_USE_SIGNALFD
		376	# include <sys/signalfd.h>
314	#endif	377	#endif
315		378
316	/**/	379	/**/
317		380
318	#if EV_VERIFY >= 3	381	#if EV_VERIFY >= 3
…		…
354	# define inline_speed static noinline	417	# define inline_speed static noinline
355	#else	418	#else
356	# define inline_speed static inline	419	# define inline_speed static inline
357	#endif	420	#endif
358		421
359	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	422	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		423
		424	#if EV_MINPRI == EV_MAXPRI
		425	# define ABSPRI(w) (((W)w), 0)
		426	#else
360	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	427	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		428	#endif
361		429
362	#define EMPTY /* required for microsofts broken pseudo-c compiler */	430	#define EMPTY /* required for microsofts broken pseudo-c compiler */
363	#define EMPTY2(a,b) /* used to suppress some warnings */	431	#define EMPTY2(a,b) /* used to suppress some warnings */
364		432
365	typedef ev_watcher *W;	433	typedef ev_watcher *W;
…		…
367	typedef ev_watcher_time *WT;	435	typedef ev_watcher_time *WT;
368		436
369	#define ev_active(w) ((W)(w))->active	437	#define ev_active(w) ((W)(w))->active
370	#define ev_at(w) ((WT)(w))->at	438	#define ev_at(w) ((WT)(w))->at
371		439
372	#if EV_USE_MONOTONIC	440	#if EV_USE_REALTIME
373	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	441	/* 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 */	442	/* giving it a reasonably high chance of working on typical architetcures */
		443	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		444	#endif
		445
		446	#if EV_USE_MONOTONIC
375	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	447	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376	#endif	448	#endif
377		449
378	#ifdef _WIN32	450	#ifdef _WIN32
379	# include "ev_win32.c"	451	# include "ev_win32.c"
…		…
444	#define ev_malloc(size) ev_realloc (0, (size))	516	#define ev_malloc(size) ev_realloc (0, (size))
445	#define ev_free(ptr) ev_realloc ((ptr), 0)	517	#define ev_free(ptr) ev_realloc ((ptr), 0)
446		518
447	/*****************************************************************************/	519	/*****************************************************************************/
448		520
		521	/* set in reify when reification needed */
		522	#define EV_ANFD_REIFY 1
		523
		524	/* file descriptor info structure */
449	typedef struct	525	typedef struct
450	{	526	{
451	WL head;	527	WL head;
452	unsigned char events;	528	unsigned char events; /* the events watched for */
453	unsigned char reify;	529	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
454	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	530	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455	unsigned char unused;	531	unsigned char unused;
456	#if EV_USE_EPOLL	532	#if EV_USE_EPOLL
457	unsigned int egen; /* generation counter to counter epoll bugs */	533	unsigned int egen; /* generation counter to counter epoll bugs */
458	#endif	534	#endif
459	#if EV_SELECT_IS_WINSOCKET	535	#if EV_SELECT_IS_WINSOCKET
460	SOCKET handle;	536	SOCKET handle;
461	#endif	537	#endif
462	} ANFD;	538	} ANFD;
463		539
		540	/* stores the pending event set for a given watcher */
464	typedef struct	541	typedef struct
465	{	542	{
466	W w;	543	W w;
467	int events;	544	int events; /* the pending event set for the given watcher */
468	} ANPENDING;	545	} ANPENDING;
469		546
470	#if EV_USE_INOTIFY	547	#if EV_USE_INOTIFY
471	/* hash table entry per inotify-id */	548	/* hash table entry per inotify-id */
472	typedef struct	549	typedef struct
…		…
475	} ANFS;	552	} ANFS;
476	#endif	553	#endif
477		554
478	/* Heap Entry */	555	/* Heap Entry */
479	#if EV_HEAP_CACHE_AT	556	#if EV_HEAP_CACHE_AT
		557	/* a heap element */
480	typedef struct {	558	typedef struct {
481	ev_tstamp at;	559	ev_tstamp at;
482	WT w;	560	WT w;
483	} ANHE;	561	} ANHE;
484		562
485	#define ANHE_w(he) (he).w /* access watcher, read-write */	563	#define ANHE_w(he) (he).w /* access watcher, read-write */
486	#define ANHE_at(he) (he).at /* access cached at, read-only */	564	#define ANHE_at(he) (he).at /* access cached at, read-only */
487	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */	565	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
488	#else	566	#else
		567	/* a heap element */
489	typedef WT ANHE;	568	typedef WT ANHE;
490		569
491	#define ANHE_w(he) (he)	570	#define ANHE_w(he) (he)
492	#define ANHE_at(he) (he)->at	571	#define ANHE_at(he) (he)->at
493	#define ANHE_at_cache(he)	572	#define ANHE_at_cache(he)
…		…
517		596
518	static int ev_default_loop_ptr;	597	static int ev_default_loop_ptr;
519		598
520	#endif	599	#endif
521		600
		601	#if EV_MINIMAL < 2
		602	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		603	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		604	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		605	#else
		606	# define EV_RELEASE_CB (void)0
		607	# define EV_ACQUIRE_CB (void)0
		608	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		609	#endif
		610
		611	#define EVUNLOOP_RECURSE 0x80
		612
522	/*****************************************************************************/	613	/*****************************************************************************/
523		614
		615	#ifndef EV_HAVE_EV_TIME
524	ev_tstamp	616	ev_tstamp
525	ev_time (void)	617	ev_time (void)
526	{	618	{
527	#if EV_USE_REALTIME	619	#if EV_USE_REALTIME
		620	if (expect_true (have_realtime))
		621	{
528	struct timespec ts;	622	struct timespec ts;
529	clock_gettime (CLOCK_REALTIME, &ts);	623	clock_gettime (CLOCK_REALTIME, &ts);
530	return ts.tv_sec + ts.tv_nsec * 1e-9;	624	return ts.tv_sec + ts.tv_nsec * 1e-9;
531	#else	625	}
		626	#endif
		627
532	struct timeval tv;	628	struct timeval tv;
533	gettimeofday (&tv, 0);	629	gettimeofday (&tv, 0);
534	return tv.tv_sec + tv.tv_usec * 1e-6;	630	return tv.tv_sec + tv.tv_usec * 1e-6;
535	#endif
536	}	631	}
		632	#endif
537		633
538	ev_tstamp inline_size	634	inline_size ev_tstamp
539	get_clock (void)	635	get_clock (void)
540	{	636	{
541	#if EV_USE_MONOTONIC	637	#if EV_USE_MONOTONIC
542	if (expect_true (have_monotonic))	638	if (expect_true (have_monotonic))
543	{	639	{
…		…
577		673
578	tv.tv_sec = (time_t)delay;	674	tv.tv_sec = (time_t)delay;
579	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	675	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
580		676
581	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	677	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
582	/* somehting nto guaranteed by newer posix versions, but guaranteed */	678	/* something not guaranteed by newer posix versions, but guaranteed */
583	/* by older ones */	679	/* by older ones */
584	select (0, 0, 0, 0, &tv);	680	select (0, 0, 0, 0, &tv);
585	#endif	681	#endif
586	}	682	}
587	}	683	}
588		684
589	/*****************************************************************************/	685	/*****************************************************************************/
590		686
591	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	687	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
592		688
593	int inline_size	689	/* find a suitable new size for the given array, */
		690	/* hopefully by rounding to a ncie-to-malloc size */
		691	inline_size int
594	array_nextsize (int elem, int cur, int cnt)	692	array_nextsize (int elem, int cur, int cnt)
595	{	693	{
596	int ncur = cur + 1;	694	int ncur = cur + 1;
597		695
598	do	696	do
…		…
639	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	737	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
640	}	738	}
641	#endif	739	#endif
642		740
643	#define array_free(stem, idx) \	741	#define array_free(stem, idx) \
644	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	742	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
645		743
646	/*****************************************************************************/	744	/*****************************************************************************/
		745
		746	/* dummy callback for pending events */
		747	static void noinline
		748	pendingcb (EV_P_ ev_prepare *w, int revents)
		749	{
		750	}
647		751
648	void noinline	752	void noinline
649	ev_feed_event (EV_P_ void *w, int revents)	753	ev_feed_event (EV_P_ void *w, int revents)
650	{	754	{
651	W w_ = (W)w;	755	W w_ = (W)w;
…		…
660	pendings [pri][w_->pending - 1].w = w_;	764	pendings [pri][w_->pending - 1].w = w_;
661	pendings [pri][w_->pending - 1].events = revents;	765	pendings [pri][w_->pending - 1].events = revents;
662	}	766	}
663	}	767	}
664		768
665	void inline_speed	769	inline_speed void
		770	feed_reverse (EV_P_ W w)
		771	{
		772	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		773	rfeeds [rfeedcnt++] = w;
		774	}
		775
		776	inline_size void
		777	feed_reverse_done (EV_P_ int revents)
		778	{
		779	do
		780	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		781	while (rfeedcnt);
		782	}
		783
		784	inline_speed void
666	queue_events (EV_P_ W *events, int eventcnt, int type)	785	queue_events (EV_P_ W *events, int eventcnt, int type)
667	{	786	{
668	int i;	787	int i;
669		788
670	for (i = 0; i < eventcnt; ++i)	789	for (i = 0; i < eventcnt; ++i)
671	ev_feed_event (EV_A_ events [i], type);	790	ev_feed_event (EV_A_ events [i], type);
672	}	791	}
673		792
674	/*****************************************************************************/	793	/*****************************************************************************/
675		794
676	void inline_speed	795	inline_speed void
677	fd_event (EV_P_ int fd, int revents)	796	fd_event_nc (EV_P_ int fd, int revents)
678	{	797	{
679	ANFD *anfd = anfds + fd;	798	ANFD *anfd = anfds + fd;
680	ev_io *w;	799	ev_io *w;
681		800
682	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	801	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
686	if (ev)	805	if (ev)
687	ev_feed_event (EV_A_ (W)w, ev);	806	ev_feed_event (EV_A_ (W)w, ev);
688	}	807	}
689	}	808	}
690		809
		810	/* do not submit kernel events for fds that have reify set */
		811	/* because that means they changed while we were polling for new events */
		812	inline_speed void
		813	fd_event (EV_P_ int fd, int revents)
		814	{
		815	ANFD *anfd = anfds + fd;
		816
		817	if (expect_true (!anfd->reify))
		818	fd_event_nc (EV_A_ fd, revents);
		819	}
		820
691	void	821	void
692	ev_feed_fd_event (EV_P_ int fd, int revents)	822	ev_feed_fd_event (EV_P_ int fd, int revents)
693	{	823	{
694	if (fd >= 0 && fd < anfdmax)	824	if (fd >= 0 && fd < anfdmax)
695	fd_event (EV_A_ fd, revents);	825	fd_event_nc (EV_A_ fd, revents);
696	}	826	}
697		827
698	void inline_size	828	/* make sure the external fd watch events are in-sync */
		829	/* with the kernel/libev internal state */
		830	inline_size void
699	fd_reify (EV_P)	831	fd_reify (EV_P)
700	{	832	{
701	int i;	833	int i;
702		834
703	for (i = 0; i < fdchangecnt; ++i)	835	for (i = 0; i < fdchangecnt; ++i)
…		…
718	#ifdef EV_FD_TO_WIN32_HANDLE	850	#ifdef EV_FD_TO_WIN32_HANDLE
719	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	851	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
720	#else	852	#else
721	anfd->handle = _get_osfhandle (fd);	853	anfd->handle = _get_osfhandle (fd);
722	#endif	854	#endif
723	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	855	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
724	}	856	}
725	#endif	857	#endif
726		858
727	{	859	{
728	unsigned char o_events = anfd->events;	860	unsigned char o_events = anfd->events;
729	unsigned char o_reify = anfd->reify;	861	unsigned char o_reify = anfd->reify;
730		862
731	anfd->reify = 0;	863	anfd->reify = 0;
732	anfd->events = events;	864	anfd->events = events;
733		865
734	if (o_events != events || o_reify & EV_IOFDSET)	866	if (o_events != events || o_reify & EV__IOFDSET)
735	backend_modify (EV_A_ fd, o_events, events);	867	backend_modify (EV_A_ fd, o_events, events);
736	}	868	}
737	}	869	}
738		870
739	fdchangecnt = 0;	871	fdchangecnt = 0;
740	}	872	}
741		873
742	void inline_size	874	/* something about the given fd changed */
		875	inline_size void
743	fd_change (EV_P_ int fd, int flags)	876	fd_change (EV_P_ int fd, int flags)
744	{	877	{
745	unsigned char reify = anfds [fd].reify;	878	unsigned char reify = anfds [fd].reify;
746	anfds [fd].reify |= flags;	879	anfds [fd].reify |= flags;
747		880
…		…
751	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	884	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
752	fdchanges [fdchangecnt - 1] = fd;	885	fdchanges [fdchangecnt - 1] = fd;
753	}	886	}
754	}	887	}
755		888
756	void inline_speed	889	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		890	inline_speed void
757	fd_kill (EV_P_ int fd)	891	fd_kill (EV_P_ int fd)
758	{	892	{
759	ev_io *w;	893	ev_io *w;
760		894
761	while ((w = (ev_io *)anfds [fd].head))	895	while ((w = (ev_io *)anfds [fd].head))
…		…
763	ev_io_stop (EV_A_ w);	897	ev_io_stop (EV_A_ w);
764	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	898	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
765	}	899	}
766	}	900	}
767		901
768	int inline_size	902	/* check whether the given fd is atcually valid, for error recovery */
		903	inline_size int
769	fd_valid (int fd)	904	fd_valid (int fd)
770	{	905	{
771	#ifdef _WIN32	906	#ifdef _WIN32
772	return _get_osfhandle (fd) != -1;	907	return _get_osfhandle (fd) != -1;
773	#else	908	#else
…		…
810	for (fd = 0; fd < anfdmax; ++fd)	945	for (fd = 0; fd < anfdmax; ++fd)
811	if (anfds [fd].events)	946	if (anfds [fd].events)
812	{	947	{
813	anfds [fd].events = 0;	948	anfds [fd].events = 0;
814	anfds [fd].emask = 0;	949	anfds [fd].emask = 0;
815	fd_change (EV_A_ fd, EV_IOFDSET | 1);	950	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
816	}	951	}
817	}	952	}
818		953
819	/*****************************************************************************/	954	/*****************************************************************************/
820		955
…		…
836	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	971	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
837	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	972	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
838	#define UPHEAP_DONE(p,k) ((p) == (k))	973	#define UPHEAP_DONE(p,k) ((p) == (k))
839		974
840	/* away from the root */	975	/* away from the root */
841	void inline_speed	976	inline_speed void
842	downheap (ANHE *heap, int N, int k)	977	downheap (ANHE *heap, int N, int k)
843	{	978	{
844	ANHE he = heap [k];	979	ANHE he = heap [k];
845	ANHE *E = heap + N + HEAP0;	980	ANHE *E = heap + N + HEAP0;
846		981
…		…
886	#define HEAP0 1	1021	#define HEAP0 1
887	#define HPARENT(k) ((k) >> 1)	1022	#define HPARENT(k) ((k) >> 1)
888	#define UPHEAP_DONE(p,k) (!(p))	1023	#define UPHEAP_DONE(p,k) (!(p))
889		1024
890	/* away from the root */	1025	/* away from the root */
891	void inline_speed	1026	inline_speed void
892	downheap (ANHE *heap, int N, int k)	1027	downheap (ANHE *heap, int N, int k)
893	{	1028	{
894	ANHE he = heap [k];	1029	ANHE he = heap [k];
895		1030
896	for (;;)	1031	for (;;)
…		…
916	ev_active (ANHE_w (he)) = k;	1051	ev_active (ANHE_w (he)) = k;
917	}	1052	}
918	#endif	1053	#endif
919		1054
920	/* towards the root */	1055	/* towards the root */
921	void inline_speed	1056	inline_speed void
922	upheap (ANHE *heap, int k)	1057	upheap (ANHE *heap, int k)
923	{	1058	{
924	ANHE he = heap [k];	1059	ANHE he = heap [k];
925		1060
926	for (;;)	1061	for (;;)
…		…
937		1072
938	heap [k] = he;	1073	heap [k] = he;
939	ev_active (ANHE_w (he)) = k;	1074	ev_active (ANHE_w (he)) = k;
940	}	1075	}
941		1076
942	void inline_size	1077	/* move an element suitably so it is in a correct place */
		1078	inline_size void
943	adjustheap (ANHE *heap, int N, int k)	1079	adjustheap (ANHE *heap, int N, int k)
944	{	1080	{
945	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1081	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
946	upheap (heap, k);	1082	upheap (heap, k);
947	else	1083	else
948	downheap (heap, N, k);	1084	downheap (heap, N, k);
949	}	1085	}
950		1086
951	/* rebuild the heap: this function is used only once and executed rarely */	1087	/* rebuild the heap: this function is used only once and executed rarely */
952	void inline_size	1088	inline_size void
953	reheap (ANHE *heap, int N)	1089	reheap (ANHE *heap, int N)
954	{	1090	{
955	int i;	1091	int i;
956		1092
957	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1093	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
960	upheap (heap, i + HEAP0);	1096	upheap (heap, i + HEAP0);
961	}	1097	}
962		1098
963	/*****************************************************************************/	1099	/*****************************************************************************/
964		1100
		1101	/* associate signal watchers to a signal signal */
965	typedef struct	1102	typedef struct
966	{	1103	{
967	WL head;	1104	WL head;
968	EV_ATOMIC_T gotsig;	1105	EV_ATOMIC_T gotsig;
969	} ANSIG;	1106	} ANSIG;
…		…
973		1110
974	static EV_ATOMIC_T gotsig;	1111	static EV_ATOMIC_T gotsig;
975		1112
976	/*****************************************************************************/	1113	/*****************************************************************************/
977		1114
978	void inline_speed	1115	/* used to prepare libev internal fd's */
		1116	/* this is not fork-safe */
		1117	inline_speed void
979	fd_intern (int fd)	1118	fd_intern (int fd)
980	{	1119	{
981	#ifdef _WIN32	1120	#ifdef _WIN32
982	unsigned long arg = 1;	1121	unsigned long arg = 1;
983	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1122	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
988	}	1127	}
989		1128
990	static void noinline	1129	static void noinline
991	evpipe_init (EV_P)	1130	evpipe_init (EV_P)
992	{	1131	{
993	if (!ev_is_active (&pipeev))	1132	if (!ev_is_active (&pipe_w))
994	{	1133	{
995	#if EV_USE_EVENTFD	1134	#if EV_USE_EVENTFD
		1135	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1136	if (evfd < 0 && errno == EINVAL)
996	if ((evfd = eventfd (0, 0)) >= 0)	1137	evfd = eventfd (0, 0);
		1138
		1139	if (evfd >= 0)
997	{	1140	{
998	evpipe [0] = -1;	1141	evpipe [0] = -1;
999	fd_intern (evfd);	1142	fd_intern (evfd); /* doing it twice doesn't hurt */
1000	ev_io_set (&pipeev, evfd, EV_READ);	1143	ev_io_set (&pipe_w, evfd, EV_READ);
1001	}	1144	}
1002	else	1145	else
1003	#endif	1146	#endif
1004	{	1147	{
1005	while (pipe (evpipe))	1148	while (pipe (evpipe))
1006	ev_syserr ("(libev) error creating signal/async pipe");	1149	ev_syserr ("(libev) error creating signal/async pipe");
1007		1150
1008	fd_intern (evpipe [0]);	1151	fd_intern (evpipe [0]);
1009	fd_intern (evpipe [1]);	1152	fd_intern (evpipe [1]);
1010	ev_io_set (&pipeev, evpipe [0], EV_READ);	1153	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1011	}	1154	}
1012		1155
1013	ev_io_start (EV_A_ &pipeev);	1156	ev_io_start (EV_A_ &pipe_w);
1014	ev_unref (EV_A); /* watcher should not keep loop alive */	1157	ev_unref (EV_A); /* watcher should not keep loop alive */
1015	}	1158	}
1016	}	1159	}
1017		1160
1018	void inline_size	1161	inline_size void
1019	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1162	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1020	{	1163	{
1021	if (!*flag)	1164	if (!*flag)
1022	{	1165	{
1023	int old_errno = errno; /* save errno because write might clobber it */	1166	int old_errno = errno; /* save errno because write might clobber it */
…		…
1036		1179
1037	errno = old_errno;	1180	errno = old_errno;
1038	}	1181	}
1039	}	1182	}
1040		1183
		1184	/* called whenever the libev signal pipe */
		1185	/* got some events (signal, async) */
1041	static void	1186	static void
1042	pipecb (EV_P_ ev_io *iow, int revents)	1187	pipecb (EV_P_ ev_io *iow, int revents)
1043	{	1188	{
1044	#if EV_USE_EVENTFD	1189	#if EV_USE_EVENTFD
1045	if (evfd >= 0)	1190	if (evfd >= 0)
…		…
1101	ev_feed_signal_event (EV_P_ int signum)	1246	ev_feed_signal_event (EV_P_ int signum)
1102	{	1247	{
1103	WL w;	1248	WL w;
1104		1249
1105	#if EV_MULTIPLICITY	1250	#if EV_MULTIPLICITY
1106	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1251	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1107	#endif	1252	#endif
1108		1253
1109	--signum;	1254	--signum;
1110		1255
1111	if (signum < 0 || signum >= signalmax)	1256	if (signum < 0 || signum >= signalmax)
…		…
1115		1260
1116	for (w = signals [signum].head; w; w = w->next)	1261	for (w = signals [signum].head; w; w = w->next)
1117	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1262	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1118	}	1263	}
1119		1264
		1265	#if EV_USE_SIGNALFD
		1266	static void
		1267	sigfdcb (EV_P_ ev_io *iow, int revents)
		1268	{
		1269	struct signalfd_siginfo si[4], *sip;
		1270
		1271	for (;;)
		1272	{
		1273	ssize_t res = read (sigfd, si, sizeof (si));
		1274
		1275	/* not ISO-C, as res might be -1, but works with SuS */
		1276	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		1277	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1278
		1279	if (res < (ssize_t)sizeof (si))
		1280	break;
		1281	}
		1282	}
		1283	#endif
		1284
1120	/*****************************************************************************/	1285	/*****************************************************************************/
1121		1286
1122	static WL childs [EV_PID_HASHSIZE];	1287	static WL childs [EV_PID_HASHSIZE];
1123		1288
1124	#ifndef _WIN32	1289	#ifndef _WIN32
…		…
1127		1292
1128	#ifndef WIFCONTINUED	1293	#ifndef WIFCONTINUED
1129	# define WIFCONTINUED(status) 0	1294	# define WIFCONTINUED(status) 0
1130	#endif	1295	#endif
1131		1296
1132	void inline_speed	1297	/* handle a single child status event */
		1298	inline_speed void
1133	child_reap (EV_P_ int chain, int pid, int status)	1299	child_reap (EV_P_ int chain, int pid, int status)
1134	{	1300	{
1135	ev_child *w;	1301	ev_child *w;
1136	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1302	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1137		1303
…		…
1150		1316
1151	#ifndef WCONTINUED	1317	#ifndef WCONTINUED
1152	# define WCONTINUED 0	1318	# define WCONTINUED 0
1153	#endif	1319	#endif
1154		1320
		1321	/* called on sigchld etc., calls waitpid */
1155	static void	1322	static void
1156	childcb (EV_P_ ev_signal *sw, int revents)	1323	childcb (EV_P_ ev_signal *sw, int revents)
1157	{	1324	{
1158	int pid, status;	1325	int pid, status;
1159		1326
…		…
1240	/* kqueue is borked on everything but netbsd apparently */	1407	/* kqueue is borked on everything but netbsd apparently */
1241	/* it usually doesn't work correctly on anything but sockets and pipes */	1408	/* it usually doesn't work correctly on anything but sockets and pipes */
1242	flags &= ~EVBACKEND_KQUEUE;	1409	flags &= ~EVBACKEND_KQUEUE;
1243	#endif	1410	#endif
1244	#ifdef __APPLE__	1411	#ifdef __APPLE__
1245	// flags &= ~EVBACKEND_KQUEUE; for documentation	1412	/* only select works correctly on that "unix-certified" platform */
1246	flags &= ~EVBACKEND_POLL;	1413	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1414	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1247	#endif	1415	#endif
1248		1416
1249	return flags;	1417	return flags;
1250	}	1418	}
1251		1419
…		…
1265	ev_backend (EV_P)	1433	ev_backend (EV_P)
1266	{	1434	{
1267	return backend;	1435	return backend;
1268	}	1436	}
1269		1437
		1438	#if EV_MINIMAL < 2
1270	unsigned int	1439	unsigned int
1271	ev_loop_count (EV_P)	1440	ev_loop_count (EV_P)
1272	{	1441	{
1273	return loop_count;	1442	return loop_count;
1274	}	1443	}
1275		1444
		1445	unsigned int
		1446	ev_loop_depth (EV_P)
		1447	{
		1448	return loop_depth;
		1449	}
		1450
1276	void	1451	void
1277	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1452	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1278	{	1453	{
1279	io_blocktime = interval;	1454	io_blocktime = interval;
1280	}	1455	}
…		…
1283	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1458	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1284	{	1459	{
1285	timeout_blocktime = interval;	1460	timeout_blocktime = interval;
1286	}	1461	}
1287		1462
		1463	void
		1464	ev_set_userdata (EV_P_ void *data)
		1465	{
		1466	userdata = data;
		1467	}
		1468
		1469	void *
		1470	ev_userdata (EV_P)
		1471	{
		1472	return userdata;
		1473	}
		1474
		1475	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1476	{
		1477	invoke_cb = invoke_pending_cb;
		1478	}
		1479
		1480	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1481	{
		1482	release_cb = release;
		1483	acquire_cb = acquire;
		1484	}
		1485	#endif
		1486
		1487	/* initialise a loop structure, must be zero-initialised */
1288	static void noinline	1488	static void noinline
1289	loop_init (EV_P_ unsigned int flags)	1489	loop_init (EV_P_ unsigned int flags)
1290	{	1490	{
1291	if (!backend)	1491	if (!backend)
1292	{	1492	{
		1493	#if EV_USE_REALTIME
		1494	if (!have_realtime)
		1495	{
		1496	struct timespec ts;
		1497
		1498	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1499	have_realtime = 1;
		1500	}
		1501	#endif
		1502
1293	#if EV_USE_MONOTONIC	1503	#if EV_USE_MONOTONIC
		1504	if (!have_monotonic)
1294	{	1505	{
1295	struct timespec ts;	1506	struct timespec ts;
		1507
1296	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1508	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1297	have_monotonic = 1;	1509	have_monotonic = 1;
1298	}	1510	}
1299	#endif	1511	#endif
1300		1512
1301	ev_rt_now = ev_time ();	1513	ev_rt_now = ev_time ();
1302	mn_now = get_clock ();	1514	mn_now = get_clock ();
1303	now_floor = mn_now;	1515	now_floor = mn_now;
1304	rtmn_diff = ev_rt_now - mn_now;	1516	rtmn_diff = ev_rt_now - mn_now;
		1517	#if EV_MINIMAL < 2
		1518	invoke_cb = ev_invoke_pending;
		1519	#endif
1305		1520
1306	io_blocktime = 0.;	1521	io_blocktime = 0.;
1307	timeout_blocktime = 0.;	1522	timeout_blocktime = 0.;
1308	backend = 0;	1523	backend = 0;
1309	backend_fd = -1;	1524	backend_fd = -1;
1310	gotasync = 0;	1525	gotasync = 0;
1311	#if EV_USE_INOTIFY	1526	#if EV_USE_INOTIFY
1312	fs_fd = -2;	1527	fs_fd = -2;
1313	#endif	1528	#endif
		1529	#if EV_USE_SIGNALFD
		1530	sigfd = -2;
		1531	#endif
1314		1532
1315	/* pid check not overridable via env */	1533	/* pid check not overridable via env */
1316	#ifndef _WIN32	1534	#ifndef _WIN32
1317	if (flags & EVFLAG_FORKCHECK)	1535	if (flags & EVFLAG_FORKCHECK)
1318	curpid = getpid ();	1536	curpid = getpid ();
…		…
1340	#endif	1558	#endif
1341	#if EV_USE_SELECT	1559	#if EV_USE_SELECT
1342	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1560	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1343	#endif	1561	#endif
1344		1562
		1563	ev_prepare_init (&pending_w, pendingcb);
		1564
1345	ev_init (&pipeev, pipecb);	1565	ev_init (&pipe_w, pipecb);
1346	ev_set_priority (&pipeev, EV_MAXPRI);	1566	ev_set_priority (&pipe_w, EV_MAXPRI);
1347	}	1567	}
1348	}	1568	}
1349		1569
		1570	/* free up a loop structure */
1350	static void noinline	1571	static void noinline
1351	loop_destroy (EV_P)	1572	loop_destroy (EV_P)
1352	{	1573	{
1353	int i;	1574	int i;
1354		1575
1355	if (ev_is_active (&pipeev))	1576	if (ev_is_active (&pipe_w))
1356	{	1577	{
1357	ev_ref (EV_A); /* signal watcher */	1578	/*ev_ref (EV_A);*/
1358	ev_io_stop (EV_A_ &pipeev);	1579	/*ev_io_stop (EV_A_ &pipe_w);*/
1359		1580
1360	#if EV_USE_EVENTFD	1581	#if EV_USE_EVENTFD
1361	if (evfd >= 0)	1582	if (evfd >= 0)
1362	close (evfd);	1583	close (evfd);
1363	#endif	1584	#endif
…		…
1367	close (evpipe [0]);	1588	close (evpipe [0]);
1368	close (evpipe [1]);	1589	close (evpipe [1]);
1369	}	1590	}
1370	}	1591	}
1371		1592
		1593	#if EV_USE_SIGNALFD
		1594	if (ev_is_active (&sigfd_w))
		1595	{
		1596	/*ev_ref (EV_A);*/
		1597	/*ev_io_stop (EV_A_ &sigfd_w);*/
		1598
		1599	close (sigfd);
		1600	}
		1601	#endif
		1602
1372	#if EV_USE_INOTIFY	1603	#if EV_USE_INOTIFY
1373	if (fs_fd >= 0)	1604	if (fs_fd >= 0)
1374	close (fs_fd);	1605	close (fs_fd);
1375	#endif	1606	#endif
1376		1607
…		…
1402	}	1633	}
1403		1634
1404	ev_free (anfds); anfdmax = 0;	1635	ev_free (anfds); anfdmax = 0;
1405		1636
1406	/* have to use the microsoft-never-gets-it-right macro */	1637	/* have to use the microsoft-never-gets-it-right macro */
		1638	array_free (rfeed, EMPTY);
1407	array_free (fdchange, EMPTY);	1639	array_free (fdchange, EMPTY);
1408	array_free (timer, EMPTY);	1640	array_free (timer, EMPTY);
1409	#if EV_PERIODIC_ENABLE	1641	#if EV_PERIODIC_ENABLE
1410	array_free (periodic, EMPTY);	1642	array_free (periodic, EMPTY);
1411	#endif	1643	#endif
…		…
1420		1652
1421	backend = 0;	1653	backend = 0;
1422	}	1654	}
1423		1655
1424	#if EV_USE_INOTIFY	1656	#if EV_USE_INOTIFY
1425	void inline_size infy_fork (EV_P);	1657	inline_size void infy_fork (EV_P);
1426	#endif	1658	#endif
1427		1659
1428	void inline_size	1660	inline_size void
1429	loop_fork (EV_P)	1661	loop_fork (EV_P)
1430	{	1662	{
1431	#if EV_USE_PORT	1663	#if EV_USE_PORT
1432	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1664	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1433	#endif	1665	#endif
…		…
1439	#endif	1671	#endif
1440	#if EV_USE_INOTIFY	1672	#if EV_USE_INOTIFY
1441	infy_fork (EV_A);	1673	infy_fork (EV_A);
1442	#endif	1674	#endif
1443		1675
1444	if (ev_is_active (&pipeev))	1676	if (ev_is_active (&pipe_w))
1445	{	1677	{
1446	/* this "locks" the handlers against writing to the pipe */	1678	/* this "locks" the handlers against writing to the pipe */
1447	/* while we modify the fd vars */	1679	/* while we modify the fd vars */
1448	gotsig = 1;	1680	gotsig = 1;
1449	#if EV_ASYNC_ENABLE	1681	#if EV_ASYNC_ENABLE
1450	gotasync = 1;	1682	gotasync = 1;
1451	#endif	1683	#endif
1452		1684
1453	ev_ref (EV_A);	1685	ev_ref (EV_A);
1454	ev_io_stop (EV_A_ &pipeev);	1686	ev_io_stop (EV_A_ &pipe_w);
1455		1687
1456	#if EV_USE_EVENTFD	1688	#if EV_USE_EVENTFD
1457	if (evfd >= 0)	1689	if (evfd >= 0)
1458	close (evfd);	1690	close (evfd);
1459	#endif	1691	#endif
…		…
1464	close (evpipe [1]);	1696	close (evpipe [1]);
1465	}	1697	}
1466		1698
1467	evpipe_init (EV_A);	1699	evpipe_init (EV_A);
1468	/* now iterate over everything, in case we missed something */	1700	/* now iterate over everything, in case we missed something */
1469	pipecb (EV_A_ &pipeev, EV_READ);	1701	pipecb (EV_A_ &pipe_w, EV_READ);
1470	}	1702	}
1471		1703
1472	postfork = 0;	1704	postfork = 0;
1473	}	1705	}
1474		1706
…		…
1478	ev_loop_new (unsigned int flags)	1710	ev_loop_new (unsigned int flags)
1479	{	1711	{
1480	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1712	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1481		1713
1482	memset (loop, 0, sizeof (struct ev_loop));	1714	memset (loop, 0, sizeof (struct ev_loop));
1483
1484	loop_init (EV_A_ flags);	1715	loop_init (EV_A_ flags);
1485		1716
1486	if (ev_backend (EV_A))	1717	if (ev_backend (EV_A))
1487	return loop;	1718	return loop;
1488		1719
…		…
1499	void	1730	void
1500	ev_loop_fork (EV_P)	1731	ev_loop_fork (EV_P)
1501	{	1732	{
1502	postfork = 1; /* must be in line with ev_default_fork */	1733	postfork = 1; /* must be in line with ev_default_fork */
1503	}	1734	}
		1735	#endif /* multiplicity */
1504		1736
1505	#if EV_VERIFY	1737	#if EV_VERIFY
1506	static void noinline	1738	static void noinline
1507	verify_watcher (EV_P_ W w)	1739	verify_watcher (EV_P_ W w)
1508	{	1740	{
1509	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1741	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1510		1742
1511	if (w->pending)	1743	if (w->pending)
1512	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	1744	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1513	}	1745	}
1514		1746
1515	static void noinline	1747	static void noinline
1516	verify_heap (EV_P_ ANHE *heap, int N)	1748	verify_heap (EV_P_ ANHE *heap, int N)
1517	{	1749	{
1518	int i;	1750	int i;
1519		1751
1520	for (i = HEAP0; i < N + HEAP0; ++i)	1752	for (i = HEAP0; i < N + HEAP0; ++i)
1521	{	1753	{
1522	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));	1754	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1523	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));	1755	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1524	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));	1756	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1525		1757
1526	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1758	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1527	}	1759	}
1528	}	1760	}
1529		1761
1530	static void noinline	1762	static void noinline
1531	array_verify (EV_P_ W *ws, int cnt)	1763	array_verify (EV_P_ W *ws, int cnt)
1532	{	1764	{
1533	while (cnt--)	1765	while (cnt--)
1534	{	1766	{
1535	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1767	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1536	verify_watcher (EV_A_ ws [cnt]);	1768	verify_watcher (EV_A_ ws [cnt]);
1537	}	1769	}
1538	}	1770	}
1539	#endif	1771	#endif
1540		1772
		1773	#if EV_MINIMAL < 2
1541	void	1774	void
1542	ev_loop_verify (EV_P)	1775	ev_loop_verify (EV_P)
1543	{	1776	{
1544	#if EV_VERIFY	1777	#if EV_VERIFY
1545	int i;	1778	int i;
…		…
1547		1780
1548	assert (activecnt >= -1);	1781	assert (activecnt >= -1);
1549		1782
1550	assert (fdchangemax >= fdchangecnt);	1783	assert (fdchangemax >= fdchangecnt);
1551	for (i = 0; i < fdchangecnt; ++i)	1784	for (i = 0; i < fdchangecnt; ++i)
1552	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1785	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1553		1786
1554	assert (anfdmax >= 0);	1787	assert (anfdmax >= 0);
1555	for (i = 0; i < anfdmax; ++i)	1788	for (i = 0; i < anfdmax; ++i)
1556	for (w = anfds [i].head; w; w = w->next)	1789	for (w = anfds [i].head; w; w = w->next)
1557	{	1790	{
1558	verify_watcher (EV_A_ (W)w);	1791	verify_watcher (EV_A_ (W)w);
1559	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1792	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1560	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));	1793	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1561	}	1794	}
1562		1795
1563	assert (timermax >= timercnt);	1796	assert (timermax >= timercnt);
1564	verify_heap (EV_A_ timers, timercnt);	1797	verify_heap (EV_A_ timers, timercnt);
1565		1798
…		…
1598	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1831	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1599	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)	1832	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1600	# endif	1833	# endif
1601	#endif	1834	#endif
1602	}	1835	}
1603		1836	#endif
1604	#endif /* multiplicity */
1605		1837
1606	#if EV_MULTIPLICITY	1838	#if EV_MULTIPLICITY
1607	struct ev_loop *	1839	struct ev_loop *
1608	ev_default_loop_init (unsigned int flags)	1840	ev_default_loop_init (unsigned int flags)
1609	#else	1841	#else
…		…
1670	ev_invoke (EV_P_ void *w, int revents)	1902	ev_invoke (EV_P_ void *w, int revents)
1671	{	1903	{
1672	EV_CB_INVOKE ((W)w, revents);	1904	EV_CB_INVOKE ((W)w, revents);
1673	}	1905	}
1674		1906
1675	void inline_speed	1907	unsigned int
1676	call_pending (EV_P)	1908	ev_pending_count (EV_P)
		1909	{
		1910	int pri;
		1911	unsigned int count = 0;
		1912
		1913	for (pri = NUMPRI; pri--; )
		1914	count += pendingcnt [pri];
		1915
		1916	return count;
		1917	}
		1918
		1919	void noinline
		1920	ev_invoke_pending (EV_P)
1677	{	1921	{
1678	int pri;	1922	int pri;
1679		1923
1680	for (pri = NUMPRI; pri--; )	1924	for (pri = NUMPRI; pri--; )
1681	while (pendingcnt [pri])	1925	while (pendingcnt [pri])
1682	{	1926	{
1683	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1927	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1684		1928
1685	if (expect_true (p->w))
1686	{
1687	/*assert (("non-pending watcher on pending list", p->w->pending));*/	1929	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1930	/* ^ this is no longer true, as pending_w could be here */
1688		1931
1689	p->w->pending = 0;	1932	p->w->pending = 0;
1690	EV_CB_INVOKE (p->w, p->events);	1933	EV_CB_INVOKE (p->w, p->events);
1691	EV_FREQUENT_CHECK;	1934	EV_FREQUENT_CHECK;
1692	}
1693	}	1935	}
1694	}	1936	}
1695		1937
1696	#if EV_IDLE_ENABLE	1938	#if EV_IDLE_ENABLE
1697	void inline_size	1939	/* make idle watchers pending. this handles the "call-idle */
		1940	/* only when higher priorities are idle" logic */
		1941	inline_size void
1698	idle_reify (EV_P)	1942	idle_reify (EV_P)
1699	{	1943	{
1700	if (expect_false (idleall))	1944	if (expect_false (idleall))
1701	{	1945	{
1702	int pri;	1946	int pri;
…		…
1714	}	1958	}
1715	}	1959	}
1716	}	1960	}
1717	#endif	1961	#endif
1718		1962
1719	void inline_size	1963	/* make timers pending */
		1964	inline_size void
1720	timers_reify (EV_P)	1965	timers_reify (EV_P)
1721	{	1966	{
1722	EV_FREQUENT_CHECK;	1967	EV_FREQUENT_CHECK;
1723		1968
1724	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1969	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1725	{	1970	{
1726	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1971	do
1727
1728	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1729
1730	/* first reschedule or stop timer */
1731	if (w->repeat)
1732	{	1972	{
		1973	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1974
		1975	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1976
		1977	/* first reschedule or stop timer */
		1978	if (w->repeat)
		1979	{
1733	ev_at (w) += w->repeat;	1980	ev_at (w) += w->repeat;
1734	if (ev_at (w) < mn_now)	1981	if (ev_at (w) < mn_now)
1735	ev_at (w) = mn_now;	1982	ev_at (w) = mn_now;
1736		1983
1737	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1984	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1738		1985
1739	ANHE_at_cache (timers [HEAP0]);	1986	ANHE_at_cache (timers [HEAP0]);
1740	downheap (timers, timercnt, HEAP0);	1987	downheap (timers, timercnt, HEAP0);
		1988	}
		1989	else
		1990	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1991
		1992	EV_FREQUENT_CHECK;
		1993	feed_reverse (EV_A_ (W)w);
1741	}	1994	}
1742	else	1995	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1743	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1744		1996
1745	EV_FREQUENT_CHECK;
1746	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1997	feed_reverse_done (EV_A_ EV_TIMEOUT);
1747	}	1998	}
1748	}	1999	}
1749		2000
1750	#if EV_PERIODIC_ENABLE	2001	#if EV_PERIODIC_ENABLE
1751	void inline_size	2002	/* make periodics pending */
		2003	inline_size void
1752	periodics_reify (EV_P)	2004	periodics_reify (EV_P)
1753	{	2005	{
1754	EV_FREQUENT_CHECK;	2006	EV_FREQUENT_CHECK;
1755		2007
1756	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	2008	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1757	{	2009	{
1758	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	2010	int feed_count = 0;
1759		2011
1760	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	2012	do
1761
1762	/* first reschedule or stop timer */
1763	if (w->reschedule_cb)
1764	{	2013	{
		2014	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		2015
		2016	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		2017
		2018	/* first reschedule or stop timer */
		2019	if (w->reschedule_cb)
		2020	{
1765	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2021	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1766		2022
1767	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	2023	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1768		2024
1769	ANHE_at_cache (periodics [HEAP0]);	2025	ANHE_at_cache (periodics [HEAP0]);
1770	downheap (periodics, periodiccnt, HEAP0);	2026	downheap (periodics, periodiccnt, HEAP0);
		2027	}
		2028	else if (w->interval)
		2029	{
		2030	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2031	/* if next trigger time is not sufficiently in the future, put it there */
		2032	/* this might happen because of floating point inexactness */
		2033	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		2034	{
		2035	ev_at (w) += w->interval;
		2036
		2037	/* if interval is unreasonably low we might still have a time in the past */
		2038	/* so correct this. this will make the periodic very inexact, but the user */
		2039	/* has effectively asked to get triggered more often than possible */
		2040	if (ev_at (w) < ev_rt_now)
		2041	ev_at (w) = ev_rt_now;
		2042	}
		2043
		2044	ANHE_at_cache (periodics [HEAP0]);
		2045	downheap (periodics, periodiccnt, HEAP0);
		2046	}
		2047	else
		2048	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		2049
		2050	EV_FREQUENT_CHECK;
		2051	feed_reverse (EV_A_ (W)w);
1771	}	2052	}
1772	else if (w->interval)	2053	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1773	{
1774	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1775	/* if next trigger time is not sufficiently in the future, put it there */
1776	/* this might happen because of floating point inexactness */
1777	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1778	{
1779	ev_at (w) += w->interval;
1780		2054
1781	/* if interval is unreasonably low we might still have a time in the past */
1782	/* so correct this. this will make the periodic very inexact, but the user */
1783	/* has effectively asked to get triggered more often than possible */
1784	if (ev_at (w) < ev_rt_now)
1785	ev_at (w) = ev_rt_now;
1786	}
1787
1788	ANHE_at_cache (periodics [HEAP0]);
1789	downheap (periodics, periodiccnt, HEAP0);
1790	}
1791	else
1792	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1793
1794	EV_FREQUENT_CHECK;
1795	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	2055	feed_reverse_done (EV_A_ EV_PERIODIC);
1796	}	2056	}
1797	}	2057	}
1798		2058
		2059	/* simply recalculate all periodics */
		2060	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1799	static void noinline	2061	static void noinline
1800	periodics_reschedule (EV_P)	2062	periodics_reschedule (EV_P)
1801	{	2063	{
1802	int i;	2064	int i;
1803		2065
…		…
1816		2078
1817	reheap (periodics, periodiccnt);	2079	reheap (periodics, periodiccnt);
1818	}	2080	}
1819	#endif	2081	#endif
1820		2082
1821	void inline_speed	2083	/* adjust all timers by a given offset */
		2084	static void noinline
		2085	timers_reschedule (EV_P_ ev_tstamp adjust)
		2086	{
		2087	int i;
		2088
		2089	for (i = 0; i < timercnt; ++i)
		2090	{
		2091	ANHE *he = timers + i + HEAP0;
		2092	ANHE_w (*he)->at += adjust;
		2093	ANHE_at_cache (*he);
		2094	}
		2095	}
		2096
		2097	/* fetch new monotonic and realtime times from the kernel */
		2098	/* also detetc if there was a timejump, and act accordingly */
		2099	inline_speed void
1822	time_update (EV_P_ ev_tstamp max_block)	2100	time_update (EV_P_ ev_tstamp max_block)
1823	{	2101	{
1824	int i;
1825
1826	#if EV_USE_MONOTONIC	2102	#if EV_USE_MONOTONIC
1827	if (expect_true (have_monotonic))	2103	if (expect_true (have_monotonic))
1828	{	2104	{
		2105	int i;
1829	ev_tstamp odiff = rtmn_diff;	2106	ev_tstamp odiff = rtmn_diff;
1830		2107
1831	mn_now = get_clock ();	2108	mn_now = get_clock ();
1832		2109
1833	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	2110	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1859	ev_rt_now = ev_time ();	2136	ev_rt_now = ev_time ();
1860	mn_now = get_clock ();	2137	mn_now = get_clock ();
1861	now_floor = mn_now;	2138	now_floor = mn_now;
1862	}	2139	}
1863		2140
		2141	/* no timer adjustment, as the monotonic clock doesn't jump */
		2142	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1864	# if EV_PERIODIC_ENABLE	2143	# if EV_PERIODIC_ENABLE
1865	periodics_reschedule (EV_A);	2144	periodics_reschedule (EV_A);
1866	# endif	2145	# endif
1867	/* no timer adjustment, as the monotonic clock doesn't jump */
1868	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1869	}	2146	}
1870	else	2147	else
1871	#endif	2148	#endif
1872	{	2149	{
1873	ev_rt_now = ev_time ();	2150	ev_rt_now = ev_time ();
1874		2151
1875	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2152	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1876	{	2153	{
		2154	/* adjust timers. this is easy, as the offset is the same for all of them */
		2155	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1877	#if EV_PERIODIC_ENABLE	2156	#if EV_PERIODIC_ENABLE
1878	periodics_reschedule (EV_A);	2157	periodics_reschedule (EV_A);
1879	#endif	2158	#endif
1880	/* adjust timers. this is easy, as the offset is the same for all of them */
1881	for (i = 0; i < timercnt; ++i)
1882	{
1883	ANHE *he = timers + i + HEAP0;
1884	ANHE_w (*he)->at += ev_rt_now - mn_now;
1885	ANHE_at_cache (*he);
1886	}
1887	}	2159	}
1888		2160
1889	mn_now = ev_rt_now;	2161	mn_now = ev_rt_now;
1890	}	2162	}
1891	}	2163	}
1892		2164
1893	void	2165	void
1894	ev_ref (EV_P)
1895	{
1896	++activecnt;
1897	}
1898
1899	void
1900	ev_unref (EV_P)
1901	{
1902	--activecnt;
1903	}
1904
1905	void
1906	ev_now_update (EV_P)
1907	{
1908	time_update (EV_A_ 1e100);
1909	}
1910
1911	static int loop_done;
1912
1913	void
1914	ev_loop (EV_P_ int flags)	2166	ev_loop (EV_P_ int flags)
1915	{	2167	{
		2168	#if EV_MINIMAL < 2
		2169	++loop_depth;
		2170	#endif
		2171
		2172	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
		2173
1916	loop_done = EVUNLOOP_CANCEL;	2174	loop_done = EVUNLOOP_CANCEL;
1917		2175
1918	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2176	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1919		2177
1920	do	2178	do
1921	{	2179	{
1922	#if EV_VERIFY >= 2	2180	#if EV_VERIFY >= 2
1923	ev_loop_verify (EV_A);	2181	ev_loop_verify (EV_A);
…		…
1936	/* we might have forked, so queue fork handlers */	2194	/* we might have forked, so queue fork handlers */
1937	if (expect_false (postfork))	2195	if (expect_false (postfork))
1938	if (forkcnt)	2196	if (forkcnt)
1939	{	2197	{
1940	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2198	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1941	call_pending (EV_A);	2199	EV_INVOKE_PENDING;
1942	}	2200	}
1943	#endif	2201	#endif
1944		2202
1945	/* queue prepare watchers (and execute them) */	2203	/* queue prepare watchers (and execute them) */
1946	if (expect_false (preparecnt))	2204	if (expect_false (preparecnt))
1947	{	2205	{
1948	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2206	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1949	call_pending (EV_A);	2207	EV_INVOKE_PENDING;
1950	}	2208	}
1951		2209
1952	if (expect_false (!activecnt))	2210	if (expect_false (loop_done))
1953	break;	2211	break;
1954		2212
1955	/* we might have forked, so reify kernel state if necessary */	2213	/* we might have forked, so reify kernel state if necessary */
1956	if (expect_false (postfork))	2214	if (expect_false (postfork))
1957	loop_fork (EV_A);	2215	loop_fork (EV_A);
…		…
1964	ev_tstamp waittime = 0.;	2222	ev_tstamp waittime = 0.;
1965	ev_tstamp sleeptime = 0.;	2223	ev_tstamp sleeptime = 0.;
1966		2224
1967	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2225	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1968	{	2226	{
		2227	/* remember old timestamp for io_blocktime calculation */
		2228	ev_tstamp prev_mn_now = mn_now;
		2229
1969	/* update time to cancel out callback processing overhead */	2230	/* update time to cancel out callback processing overhead */
1970	time_update (EV_A_ 1e100);	2231	time_update (EV_A_ 1e100);
1971		2232
1972	waittime = MAX_BLOCKTIME;	2233	waittime = MAX_BLOCKTIME;
1973		2234
…		…
1983	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2244	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1984	if (waittime > to) waittime = to;	2245	if (waittime > to) waittime = to;
1985	}	2246	}
1986	#endif	2247	#endif
1987		2248
		2249	/* don't let timeouts decrease the waittime below timeout_blocktime */
1988	if (expect_false (waittime < timeout_blocktime))	2250	if (expect_false (waittime < timeout_blocktime))
1989	waittime = timeout_blocktime;	2251	waittime = timeout_blocktime;
1990		2252
1991	sleeptime = waittime - backend_fudge;	2253	/* extra check because io_blocktime is commonly 0 */
1992
1993	if (expect_true (sleeptime > io_blocktime))	2254	if (expect_false (io_blocktime))
1994	sleeptime = io_blocktime;
1995
1996	if (sleeptime)
1997	{	2255	{
		2256	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2257
		2258	if (sleeptime > waittime - backend_fudge)
		2259	sleeptime = waittime - backend_fudge;
		2260
		2261	if (expect_true (sleeptime > 0.))
		2262	{
1998	ev_sleep (sleeptime);	2263	ev_sleep (sleeptime);
1999	waittime -= sleeptime;	2264	waittime -= sleeptime;
		2265	}
2000	}	2266	}
2001	}	2267	}
2002		2268
		2269	#if EV_MINIMAL < 2
2003	++loop_count;	2270	++loop_count;
		2271	#endif
		2272	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2004	backend_poll (EV_A_ waittime);	2273	backend_poll (EV_A_ waittime);
		2274	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2005		2275
2006	/* update ev_rt_now, do magic */	2276	/* update ev_rt_now, do magic */
2007	time_update (EV_A_ waittime + sleeptime);	2277	time_update (EV_A_ waittime + sleeptime);
2008	}	2278	}
2009		2279
…		…
2020		2290
2021	/* queue check watchers, to be executed first */	2291	/* queue check watchers, to be executed first */
2022	if (expect_false (checkcnt))	2292	if (expect_false (checkcnt))
2023	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2293	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2024		2294
2025	call_pending (EV_A);	2295	EV_INVOKE_PENDING;
2026	}	2296	}
2027	while (expect_true (	2297	while (expect_true (
2028	activecnt	2298	activecnt
2029	&& !loop_done	2299	&& !loop_done
2030	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2300	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2031	));	2301	));
2032		2302
2033	if (loop_done == EVUNLOOP_ONE)	2303	if (loop_done == EVUNLOOP_ONE)
2034	loop_done = EVUNLOOP_CANCEL;	2304	loop_done = EVUNLOOP_CANCEL;
		2305
		2306	#if EV_MINIMAL < 2
		2307	--loop_depth;
		2308	#endif
2035	}	2309	}
2036		2310
2037	void	2311	void
2038	ev_unloop (EV_P_ int how)	2312	ev_unloop (EV_P_ int how)
2039	{	2313	{
2040	loop_done = how;	2314	loop_done = how;
2041	}	2315	}
2042		2316
		2317	void
		2318	ev_ref (EV_P)
		2319	{
		2320	++activecnt;
		2321	}
		2322
		2323	void
		2324	ev_unref (EV_P)
		2325	{
		2326	--activecnt;
		2327	}
		2328
		2329	void
		2330	ev_now_update (EV_P)
		2331	{
		2332	time_update (EV_A_ 1e100);
		2333	}
		2334
		2335	void
		2336	ev_suspend (EV_P)
		2337	{
		2338	ev_now_update (EV_A);
		2339	}
		2340
		2341	void
		2342	ev_resume (EV_P)
		2343	{
		2344	ev_tstamp mn_prev = mn_now;
		2345
		2346	ev_now_update (EV_A);
		2347	timers_reschedule (EV_A_ mn_now - mn_prev);
		2348	#if EV_PERIODIC_ENABLE
		2349	/* TODO: really do this? */
		2350	periodics_reschedule (EV_A);
		2351	#endif
		2352	}
		2353
2043	/*****************************************************************************/	2354	/*****************************************************************************/
		2355	/* singly-linked list management, used when the expected list length is short */
2044		2356
2045	void inline_size	2357	inline_size void
2046	wlist_add (WL *head, WL elem)	2358	wlist_add (WL *head, WL elem)
2047	{	2359	{
2048	elem->next = *head;	2360	elem->next = *head;
2049	*head = elem;	2361	*head = elem;
2050	}	2362	}
2051		2363
2052	void inline_size	2364	inline_size void
2053	wlist_del (WL *head, WL elem)	2365	wlist_del (WL *head, WL elem)
2054	{	2366	{
2055	while (*head)	2367	while (*head)
2056	{	2368	{
2057	if (*head == elem)	2369	if (*head == elem)
…		…
2062		2374
2063	head = &(*head)->next;	2375	head = &(*head)->next;
2064	}	2376	}
2065	}	2377	}
2066		2378
2067	void inline_speed	2379	/* internal, faster, version of ev_clear_pending */
		2380	inline_speed void
2068	clear_pending (EV_P_ W w)	2381	clear_pending (EV_P_ W w)
2069	{	2382	{
2070	if (w->pending)	2383	if (w->pending)
2071	{	2384	{
2072	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2385	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2073	w->pending = 0;	2386	w->pending = 0;
2074	}	2387	}
2075	}	2388	}
2076		2389
2077	int	2390	int
…		…
2081	int pending = w_->pending;	2394	int pending = w_->pending;
2082		2395
2083	if (expect_true (pending))	2396	if (expect_true (pending))
2084	{	2397	{
2085	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2398	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2399	p->w = (W)&pending_w;
2086	w_->pending = 0;	2400	w_->pending = 0;
2087	p->w = 0;
2088	return p->events;	2401	return p->events;
2089	}	2402	}
2090	else	2403	else
2091	return 0;	2404	return 0;
2092	}	2405	}
2093		2406
2094	void inline_size	2407	inline_size void
2095	pri_adjust (EV_P_ W w)	2408	pri_adjust (EV_P_ W w)
2096	{	2409	{
2097	int pri = w->priority;	2410	int pri = ev_priority (w);
2098	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2411	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2099	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2412	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2100	w->priority = pri;	2413	ev_set_priority (w, pri);
2101	}	2414	}
2102		2415
2103	void inline_speed	2416	inline_speed void
2104	ev_start (EV_P_ W w, int active)	2417	ev_start (EV_P_ W w, int active)
2105	{	2418	{
2106	pri_adjust (EV_A_ w);	2419	pri_adjust (EV_A_ w);
2107	w->active = active;	2420	w->active = active;
2108	ev_ref (EV_A);	2421	ev_ref (EV_A);
2109	}	2422	}
2110		2423
2111	void inline_size	2424	inline_size void
2112	ev_stop (EV_P_ W w)	2425	ev_stop (EV_P_ W w)
2113	{	2426	{
2114	ev_unref (EV_A);	2427	ev_unref (EV_A);
2115	w->active = 0;	2428	w->active = 0;
2116	}	2429	}
…		…
2123	int fd = w->fd;	2436	int fd = w->fd;
2124		2437
2125	if (expect_false (ev_is_active (w)))	2438	if (expect_false (ev_is_active (w)))
2126	return;	2439	return;
2127		2440
2128	assert (("ev_io_start called with negative fd", fd >= 0));	2441	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2129	assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));	2442	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2130		2443
2131	EV_FREQUENT_CHECK;	2444	EV_FREQUENT_CHECK;
2132		2445
2133	ev_start (EV_A_ (W)w, 1);	2446	ev_start (EV_A_ (W)w, 1);
2134	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2447	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2135	wlist_add (&anfds[fd].head, (WL)w);	2448	wlist_add (&anfds[fd].head, (WL)w);
2136		2449
2137	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2450	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2138	w->events &= ~EV_IOFDSET;	2451	w->events &= ~EV__IOFDSET;
2139		2452
2140	EV_FREQUENT_CHECK;	2453	EV_FREQUENT_CHECK;
2141	}	2454	}
2142		2455
2143	void noinline	2456	void noinline
…		…
2145	{	2458	{
2146	clear_pending (EV_A_ (W)w);	2459	clear_pending (EV_A_ (W)w);
2147	if (expect_false (!ev_is_active (w)))	2460	if (expect_false (!ev_is_active (w)))
2148	return;	2461	return;
2149		2462
2150	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2463	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2151		2464
2152	EV_FREQUENT_CHECK;	2465	EV_FREQUENT_CHECK;
2153		2466
2154	wlist_del (&anfds[w->fd].head, (WL)w);	2467	wlist_del (&anfds[w->fd].head, (WL)w);
2155	ev_stop (EV_A_ (W)w);	2468	ev_stop (EV_A_ (W)w);
…		…
2165	if (expect_false (ev_is_active (w)))	2478	if (expect_false (ev_is_active (w)))
2166	return;	2479	return;
2167		2480
2168	ev_at (w) += mn_now;	2481	ev_at (w) += mn_now;
2169		2482
2170	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2483	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2171		2484
2172	EV_FREQUENT_CHECK;	2485	EV_FREQUENT_CHECK;
2173		2486
2174	++timercnt;	2487	++timercnt;
2175	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2488	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2178	ANHE_at_cache (timers [ev_active (w)]);	2491	ANHE_at_cache (timers [ev_active (w)]);
2179	upheap (timers, ev_active (w));	2492	upheap (timers, ev_active (w));
2180		2493
2181	EV_FREQUENT_CHECK;	2494	EV_FREQUENT_CHECK;
2182		2495
2183	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2496	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2184	}	2497	}
2185		2498
2186	void noinline	2499	void noinline
2187	ev_timer_stop (EV_P_ ev_timer *w)	2500	ev_timer_stop (EV_P_ ev_timer *w)
2188	{	2501	{
…		…
2193	EV_FREQUENT_CHECK;	2506	EV_FREQUENT_CHECK;
2194		2507
2195	{	2508	{
2196	int active = ev_active (w);	2509	int active = ev_active (w);
2197		2510
2198	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2511	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2199		2512
2200	--timercnt;	2513	--timercnt;
2201		2514
2202	if (expect_true (active < timercnt + HEAP0))	2515	if (expect_true (active < timercnt + HEAP0))
2203	{	2516	{
…		…
2236	}	2549	}
2237		2550
2238	EV_FREQUENT_CHECK;	2551	EV_FREQUENT_CHECK;
2239	}	2552	}
2240		2553
		2554	ev_tstamp
		2555	ev_timer_remaining (EV_P_ ev_timer *w)
		2556	{
		2557	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2558	}
		2559
2241	#if EV_PERIODIC_ENABLE	2560	#if EV_PERIODIC_ENABLE
2242	void noinline	2561	void noinline
2243	ev_periodic_start (EV_P_ ev_periodic *w)	2562	ev_periodic_start (EV_P_ ev_periodic *w)
2244	{	2563	{
2245	if (expect_false (ev_is_active (w)))	2564	if (expect_false (ev_is_active (w)))
…		…
2247		2566
2248	if (w->reschedule_cb)	2567	if (w->reschedule_cb)
2249	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2568	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2250	else if (w->interval)	2569	else if (w->interval)
2251	{	2570	{
2252	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2571	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2253	/* this formula differs from the one in periodic_reify because we do not always round up */	2572	/* this formula differs from the one in periodic_reify because we do not always round up */
2254	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2573	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2255	}	2574	}
2256	else	2575	else
2257	ev_at (w) = w->offset;	2576	ev_at (w) = w->offset;
…		…
2265	ANHE_at_cache (periodics [ev_active (w)]);	2584	ANHE_at_cache (periodics [ev_active (w)]);
2266	upheap (periodics, ev_active (w));	2585	upheap (periodics, ev_active (w));
2267		2586
2268	EV_FREQUENT_CHECK;	2587	EV_FREQUENT_CHECK;
2269		2588
2270	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2589	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2271	}	2590	}
2272		2591
2273	void noinline	2592	void noinline
2274	ev_periodic_stop (EV_P_ ev_periodic *w)	2593	ev_periodic_stop (EV_P_ ev_periodic *w)
2275	{	2594	{
…		…
2280	EV_FREQUENT_CHECK;	2599	EV_FREQUENT_CHECK;
2281		2600
2282	{	2601	{
2283	int active = ev_active (w);	2602	int active = ev_active (w);
2284		2603
2285	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2604	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2286		2605
2287	--periodiccnt;	2606	--periodiccnt;
2288		2607
2289	if (expect_true (active < periodiccnt + HEAP0))	2608	if (expect_true (active < periodiccnt + HEAP0))
2290	{	2609	{
…		…
2313		2632
2314	void noinline	2633	void noinline
2315	ev_signal_start (EV_P_ ev_signal *w)	2634	ev_signal_start (EV_P_ ev_signal *w)
2316	{	2635	{
2317	#if EV_MULTIPLICITY	2636	#if EV_MULTIPLICITY
2318	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2637	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2319	#endif	2638	#endif
2320	if (expect_false (ev_is_active (w)))	2639	if (expect_false (ev_is_active (w)))
2321	return;	2640	return;
2322		2641
2323	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2642	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2324		2643
		2644	EV_FREQUENT_CHECK;
		2645
		2646	#if EV_USE_SIGNALFD
		2647	if (sigfd == -2)
		2648	{
		2649	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
		2650	if (sigfd < 0 && errno == EINVAL)
		2651	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
		2652
		2653	if (sigfd >= 0)
		2654	{
		2655	fd_intern (sigfd); /* doing it twice will not hurt */
		2656
		2657	sigemptyset (&sigfd_set);
		2658
		2659	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2660	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2661	ev_io_start (EV_A_ &sigfd_w);
		2662	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2663	}
		2664	}
		2665
		2666	if (sigfd >= 0)
		2667	{
		2668	/* TODO: check .head */
		2669	sigaddset (&sigfd_set, w->signum);
		2670	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2671
		2672	signalfd (sigfd, &sigfd_set, 0);
		2673	}
		2674	else
		2675	#endif
2325	evpipe_init (EV_A);	2676	evpipe_init (EV_A);
2326
2327	EV_FREQUENT_CHECK;
2328		2677
2329	{	2678	{
2330	#ifndef _WIN32	2679	#ifndef _WIN32
2331	sigset_t full, prev;	2680	sigset_t full, prev;
2332	sigfillset (&full);	2681	sigfillset (&full);
…		…
2334	#endif	2683	#endif
2335		2684
2336	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);	2685	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2337		2686
2338	#ifndef _WIN32	2687	#ifndef _WIN32
		2688	# if EV_USE_SIGNALFD
		2689	if (sigfd < 0)/*TODO*/
		2690	# endif
		2691	sigdelset (&prev, w->signum);
2339	sigprocmask (SIG_SETMASK, &prev, 0);	2692	sigprocmask (SIG_SETMASK, &prev, 0);
2340	#endif	2693	#endif
2341	}	2694	}
2342		2695
2343	ev_start (EV_A_ (W)w, 1);	2696	ev_start (EV_A_ (W)w, 1);
…		…
2346	if (!((WL)w)->next)	2699	if (!((WL)w)->next)
2347	{	2700	{
2348	#if _WIN32	2701	#if _WIN32
2349	signal (w->signum, ev_sighandler);	2702	signal (w->signum, ev_sighandler);
2350	#else	2703	#else
		2704	# if EV_USE_SIGNALFD
		2705	if (sigfd < 0) /*TODO*/
		2706	# endif
		2707	{
2351	struct sigaction sa;	2708	struct sigaction sa = { };
2352	sa.sa_handler = ev_sighandler;	2709	sa.sa_handler = ev_sighandler;
2353	sigfillset (&sa.sa_mask);	2710	sigfillset (&sa.sa_mask);
2354	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2711	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2355	sigaction (w->signum, &sa, 0);	2712	sigaction (w->signum, &sa, 0);
		2713	}
2356	#endif	2714	#endif
2357	}	2715	}
2358		2716
2359	EV_FREQUENT_CHECK;	2717	EV_FREQUENT_CHECK;
2360	}	2718	}
…		…
2370		2728
2371	wlist_del (&signals [w->signum - 1].head, (WL)w);	2729	wlist_del (&signals [w->signum - 1].head, (WL)w);
2372	ev_stop (EV_A_ (W)w);	2730	ev_stop (EV_A_ (W)w);
2373		2731
2374	if (!signals [w->signum - 1].head)	2732	if (!signals [w->signum - 1].head)
		2733	#if EV_USE_SIGNALFD
		2734	if (sigfd >= 0)
		2735	{
		2736	sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
		2737	sigdelset (&sigfd_set, w->signum);
		2738	signalfd (sigfd, &sigfd_set, 0);
		2739	sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
		2740	/*TODO: maybe unblock signal? */
		2741	}
		2742	else
		2743	#endif
2375	signal (w->signum, SIG_DFL);	2744	signal (w->signum, SIG_DFL);
2376		2745
2377	EV_FREQUENT_CHECK;	2746	EV_FREQUENT_CHECK;
2378	}	2747	}
2379		2748
2380	void	2749	void
2381	ev_child_start (EV_P_ ev_child *w)	2750	ev_child_start (EV_P_ ev_child *w)
2382	{	2751	{
2383	#if EV_MULTIPLICITY	2752	#if EV_MULTIPLICITY
2384	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2753	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2385	#endif	2754	#endif
2386	if (expect_false (ev_is_active (w)))	2755	if (expect_false (ev_is_active (w)))
2387	return;	2756	return;
2388		2757
2389	EV_FREQUENT_CHECK;	2758	EV_FREQUENT_CHECK;
…		…
2414	# ifdef _WIN32	2783	# ifdef _WIN32
2415	# undef lstat	2784	# undef lstat
2416	# define lstat(a,b) _stati64 (a,b)	2785	# define lstat(a,b) _stati64 (a,b)
2417	# endif	2786	# endif
2418		2787
2419	#define DEF_STAT_INTERVAL 5.0074891	2788	#define DEF_STAT_INTERVAL 5.0074891
		2789	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2420	#define MIN_STAT_INTERVAL 0.1074891	2790	#define MIN_STAT_INTERVAL 0.1074891
2421		2791
2422	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2792	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2423		2793
2424	#if EV_USE_INOTIFY	2794	#if EV_USE_INOTIFY
2425	# define EV_INOTIFY_BUFSIZE 8192	2795	# define EV_INOTIFY_BUFSIZE 8192
…		…
2429	{	2799	{
2430	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);	2800	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);
2431		2801
2432	if (w->wd < 0)	2802	if (w->wd < 0)
2433	{	2803	{
		2804	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2434	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2805	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2435		2806
2436	/* monitor some parent directory for speedup hints */	2807	/* monitor some parent directory for speedup hints */
2437	/* note that exceeding the hardcoded limit is not a correctness issue, */	2808	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2438	/* but an efficiency issue only */	2809	/* but an efficiency issue only */
2439	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2810	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2440	{	2811	{
2441	char path [4096];	2812	char path [4096];
2442	strcpy (path, w->path);	2813	strcpy (path, w->path);
…		…
2446	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2817	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2447	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2818	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2448		2819
2449	char *pend = strrchr (path, '/');	2820	char *pend = strrchr (path, '/');
2450		2821
2451	if (!pend)	2822	if (!pend || pend == path)
2452	break; /* whoops, no '/', complain to your admin */	2823	break;
2453		2824
2454	*pend = 0;	2825	*pend = 0;
2455	w->wd = inotify_add_watch (fs_fd, path, mask);	2826	w->wd = inotify_add_watch (fs_fd, path, mask);
2456	}	2827	}
2457	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2828	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2458	}	2829	}
2459	}	2830	}
2460	else
2461	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2462		2831
2463	if (w->wd >= 0)	2832	if (w->wd >= 0)
		2833	{
2464	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2834	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2835
		2836	/* now local changes will be tracked by inotify, but remote changes won't */
		2837	/* unless the filesystem it known to be local, we therefore still poll */
		2838	/* also do poll on <2.6.25, but with normal frequency */
		2839	struct statfs sfs;
		2840
		2841	if (fs_2625 && !statfs (w->path, &sfs))
		2842	if (sfs.f_type == 0x1373 /* devfs */
		2843	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2844	|| sfs.f_type == 0x3153464a /* jfs */
		2845	|| sfs.f_type == 0x52654973 /* reiser3 */
		2846	|| sfs.f_type == 0x01021994 /* tempfs */
		2847	|| sfs.f_type == 0x58465342 /* xfs */)
		2848	return;
		2849
		2850	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2851	ev_timer_again (EV_A_ &w->timer);
		2852	}
2465	}	2853	}
2466		2854
2467	static void noinline	2855	static void noinline
2468	infy_del (EV_P_ ev_stat *w)	2856	infy_del (EV_P_ ev_stat *w)
2469	{	2857	{
…		…
2499		2887
2500	if (w->wd == wd || wd == -1)	2888	if (w->wd == wd || wd == -1)
2501	{	2889	{
2502	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2890	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2503	{	2891	{
		2892	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2504	w->wd = -1;	2893	w->wd = -1;
2505	infy_add (EV_A_ w); /* re-add, no matter what */	2894	infy_add (EV_A_ w); /* re-add, no matter what */
2506	}	2895	}
2507		2896
2508	stat_timer_cb (EV_A_ &w->timer, 0);	2897	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2521		2910
2522	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2911	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2523	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2912	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2524	}	2913	}
2525		2914
2526	void inline_size	2915	inline_size void
2527	infy_init (EV_P)	2916	check_2625 (EV_P)
2528	{	2917	{
2529	if (fs_fd != -2)
2530	return;
2531
2532	/* kernels < 2.6.25 are borked	2918	/* kernels < 2.6.25 are borked
2533	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2919	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2534	*/	2920	*/
2535	{
2536	struct utsname buf;	2921	struct utsname buf;
2537	int major, minor, micro;	2922	int major, minor, micro;
2538		2923
2539	fs_fd = -1;
2540
2541	if (uname (&buf))	2924	if (uname (&buf))
2542	return;	2925	return;
2543		2926
2544	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)	2927	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2545	return;	2928	return;
2546		2929
2547	if (major < 2	2930	if (major < 2
2548	|| (major == 2 && minor < 6)	2931	|| (major == 2 && minor < 6)
2549	|| (major == 2 && minor == 6 && micro < 25))	2932	|| (major == 2 && minor == 6 && micro < 25))
2550	return;	2933	return;
2551	}	2934
		2935	fs_2625 = 1;
		2936	}
		2937
		2938	inline_size void
		2939	infy_init (EV_P)
		2940	{
		2941	if (fs_fd != -2)
		2942	return;
		2943
		2944	fs_fd = -1;
		2945
		2946	check_2625 (EV_A);
2552		2947
2553	fs_fd = inotify_init ();	2948	fs_fd = inotify_init ();
2554		2949
2555	if (fs_fd >= 0)	2950	if (fs_fd >= 0)
2556	{	2951	{
…		…
2558	ev_set_priority (&fs_w, EV_MAXPRI);	2953	ev_set_priority (&fs_w, EV_MAXPRI);
2559	ev_io_start (EV_A_ &fs_w);	2954	ev_io_start (EV_A_ &fs_w);
2560	}	2955	}
2561	}	2956	}
2562		2957
2563	void inline_size	2958	inline_size void
2564	infy_fork (EV_P)	2959	infy_fork (EV_P)
2565	{	2960	{
2566	int slot;	2961	int slot;
2567		2962
2568	if (fs_fd < 0)	2963	if (fs_fd < 0)
…		…
2584	w->wd = -1;	2979	w->wd = -1;
2585		2980
2586	if (fs_fd >= 0)	2981	if (fs_fd >= 0)
2587	infy_add (EV_A_ w); /* re-add, no matter what */	2982	infy_add (EV_A_ w); /* re-add, no matter what */
2588	else	2983	else
2589	ev_timer_start (EV_A_ &w->timer);	2984	ev_timer_again (EV_A_ &w->timer);
2590	}	2985	}
2591	}	2986	}
2592	}	2987	}
2593		2988
2594	#endif	2989	#endif
…		…
2649	ev_stat_start (EV_P_ ev_stat *w)	3044	ev_stat_start (EV_P_ ev_stat *w)
2650	{	3045	{
2651	if (expect_false (ev_is_active (w)))	3046	if (expect_false (ev_is_active (w)))
2652	return;	3047	return;
2653		3048
2654	/* since we use memcmp, we need to clear any padding data etc. */
2655	memset (&w->prev, 0, sizeof (ev_statdata));
2656	memset (&w->attr, 0, sizeof (ev_statdata));
2657
2658	ev_stat_stat (EV_A_ w);	3049	ev_stat_stat (EV_A_ w);
2659		3050
		3051	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2660	if (w->interval < MIN_STAT_INTERVAL)	3052	w->interval = MIN_STAT_INTERVAL;
2661	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2662		3053
2663	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	3054	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2664	ev_set_priority (&w->timer, ev_priority (w));	3055	ev_set_priority (&w->timer, ev_priority (w));
2665		3056
2666	#if EV_USE_INOTIFY	3057	#if EV_USE_INOTIFY
2667	infy_init (EV_A);	3058	infy_init (EV_A);
2668		3059
2669	if (fs_fd >= 0)	3060	if (fs_fd >= 0)
2670	infy_add (EV_A_ w);	3061	infy_add (EV_A_ w);
2671	else	3062	else
2672	#endif	3063	#endif
2673	ev_timer_start (EV_A_ &w->timer);	3064	ev_timer_again (EV_A_ &w->timer);
2674		3065
2675	ev_start (EV_A_ (W)w, 1);	3066	ev_start (EV_A_ (W)w, 1);
2676		3067
2677	EV_FREQUENT_CHECK;	3068	EV_FREQUENT_CHECK;
2678	}	3069	}
…		…
2853	static void	3244	static void
2854	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3245	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2855	{	3246	{
2856	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3247	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2857		3248
		3249	ev_embed_stop (EV_A_ w);
		3250
2858	{	3251	{
2859	struct ev_loop *loop = w->other;	3252	struct ev_loop *loop = w->other;
2860		3253
2861	ev_loop_fork (EV_A);	3254	ev_loop_fork (EV_A);
		3255	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2862	}	3256	}
		3257
		3258	ev_embed_start (EV_A_ w);
2863	}	3259	}
2864		3260
2865	#if 0	3261	#if 0
2866	static void	3262	static void
2867	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3263	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2876	if (expect_false (ev_is_active (w)))	3272	if (expect_false (ev_is_active (w)))
2877	return;	3273	return;
2878		3274
2879	{	3275	{
2880	struct ev_loop *loop = w->other;	3276	struct ev_loop *loop = w->other;
2881	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3277	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2882	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3278	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2883	}	3279	}
2884		3280
2885	EV_FREQUENT_CHECK;	3281	EV_FREQUENT_CHECK;
2886		3282
…		…
3069	ev_timer_set (&once->to, timeout, 0.);	3465	ev_timer_set (&once->to, timeout, 0.);
3070	ev_timer_start (EV_A_ &once->to);	3466	ev_timer_start (EV_A_ &once->to);
3071	}	3467	}
3072	}	3468	}
3073		3469
		3470	/*****************************************************************************/
		3471
		3472	#if EV_WALK_ENABLE
		3473	void
		3474	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3475	{
		3476	int i, j;
		3477	ev_watcher_list *wl, *wn;
		3478
		3479	if (types & (EV_IO | EV_EMBED))
		3480	for (i = 0; i < anfdmax; ++i)
		3481	for (wl = anfds [i].head; wl; )
		3482	{
		3483	wn = wl->next;
		3484
		3485	#if EV_EMBED_ENABLE
		3486	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3487	{
		3488	if (types & EV_EMBED)
		3489	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3490	}
		3491	else
		3492	#endif
		3493	#if EV_USE_INOTIFY
		3494	if (ev_cb ((ev_io *)wl) == infy_cb)
		3495	;
		3496	else
		3497	#endif
		3498	if ((ev_io *)wl != &pipe_w)
		3499	if (types & EV_IO)
		3500	cb (EV_A_ EV_IO, wl);
		3501
		3502	wl = wn;
		3503	}
		3504
		3505	if (types & (EV_TIMER | EV_STAT))
		3506	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3507	#if EV_STAT_ENABLE
		3508	/*TODO: timer is not always active*/
		3509	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3510	{
		3511	if (types & EV_STAT)
		3512	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3513	}
		3514	else
		3515	#endif
		3516	if (types & EV_TIMER)
		3517	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3518
		3519	#if EV_PERIODIC_ENABLE
		3520	if (types & EV_PERIODIC)
		3521	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3522	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3523	#endif
		3524
		3525	#if EV_IDLE_ENABLE
		3526	if (types & EV_IDLE)
		3527	for (j = NUMPRI; i--; )
		3528	for (i = idlecnt [j]; i--; )
		3529	cb (EV_A_ EV_IDLE, idles [j][i]);
		3530	#endif
		3531
		3532	#if EV_FORK_ENABLE
		3533	if (types & EV_FORK)
		3534	for (i = forkcnt; i--; )
		3535	if (ev_cb (forks [i]) != embed_fork_cb)
		3536	cb (EV_A_ EV_FORK, forks [i]);
		3537	#endif
		3538
		3539	#if EV_ASYNC_ENABLE
		3540	if (types & EV_ASYNC)
		3541	for (i = asynccnt; i--; )
		3542	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3543	#endif
		3544
		3545	if (types & EV_PREPARE)
		3546	for (i = preparecnt; i--; )
		3547	#if EV_EMBED_ENABLE
		3548	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3549	#endif
		3550	cb (EV_A_ EV_PREPARE, prepares [i]);
		3551
		3552	if (types & EV_CHECK)
		3553	for (i = checkcnt; i--; )
		3554	cb (EV_A_ EV_CHECK, checks [i]);
		3555
		3556	if (types & EV_SIGNAL)
		3557	for (i = 0; i < signalmax; ++i)
		3558	for (wl = signals [i].head; wl; )
		3559	{
		3560	wn = wl->next;
		3561	cb (EV_A_ EV_SIGNAL, wl);
		3562	wl = wn;
		3563	}
		3564
		3565	if (types & EV_CHILD)
		3566	for (i = EV_PID_HASHSIZE; i--; )
		3567	for (wl = childs [i]; wl; )
		3568	{
		3569	wn = wl->next;
		3570	cb (EV_A_ EV_CHILD, wl);
		3571	wl = wn;
		3572	}
		3573	/* EV_STAT 0x00001000 /* stat data changed */
		3574	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3575	}
		3576	#endif
		3577
3074	#if EV_MULTIPLICITY	3578	#if EV_MULTIPLICITY
3075	#include "ev_wrap.h"	3579	#include "ev_wrap.h"
3076	#endif	3580	#endif
3077		3581
3078	#ifdef __cplusplus	3582	#ifdef __cplusplus

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