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Comparing libev/ev.c (file contents):
Revision 1.262 by root, Wed Oct 1 04:25:25 2008 UTC vs.
Revision 1.303 by root, Sun Jul 19 01:36:34 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
…		…
286	# include <sys/select.h>	338	# include <sys/select.h>
287	# endif	339	# endif
288	#endif	340	#endif
289		341
290	#if EV_USE_INOTIFY	342	#if EV_USE_INOTIFY
		343	# include <sys/utsname.h>
		344	# include <sys/statfs.h>
291	# include <sys/inotify.h>	345	# include <sys/inotify.h>
		346	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		347	# ifndef IN_DONT_FOLLOW
		348	# undef EV_USE_INOTIFY
		349	# define EV_USE_INOTIFY 0
		350	# endif
292	#endif	351	#endif
293		352
294	#if EV_SELECT_IS_WINSOCKET	353	#if EV_SELECT_IS_WINSOCKET
295	# include <winsock.h>	354	# include <winsock.h>
296	#endif	355	#endif
297		356
298	#if EV_USE_EVENTFD	357	#if EV_USE_EVENTFD
299	/* 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 */
300	# 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
301	# ifdef __cplusplus	366	# ifdef __cplusplus
302	extern "C" {	367	extern "C" {
303	# endif	368	# endif
304	int eventfd (unsigned int initval, int flags);	369	int eventfd (unsigned int initval, int flags);
305	# ifdef __cplusplus	370	# ifdef __cplusplus
306	}	371	}
307	# endif	372	# endif
		373	#endif
		374
		375	#if EV_USE_SIGNALFD
		376	# include <sys/signalfd.h>
308	#endif	377	#endif
309		378
310	/**/	379	/**/
311		380
312	#if EV_VERIFY >= 3	381	#if EV_VERIFY >= 3
…		…
348	# define inline_speed static noinline	417	# define inline_speed static noinline
349	#else	418	#else
350	# define inline_speed static inline	419	# define inline_speed static inline
351	#endif	420	#endif
352		421
353	#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
354	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	427	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		428	#endif
355		429
356	#define EMPTY /* required for microsofts broken pseudo-c compiler */	430	#define EMPTY /* required for microsofts broken pseudo-c compiler */
357	#define EMPTY2(a,b) /* used to suppress some warnings */	431	#define EMPTY2(a,b) /* used to suppress some warnings */
358		432
359	typedef ev_watcher *W;	433	typedef ev_watcher *W;
…		…
361	typedef ev_watcher_time *WT;	435	typedef ev_watcher_time *WT;
362		436
363	#define ev_active(w) ((W)(w))->active	437	#define ev_active(w) ((W)(w))->active
364	#define ev_at(w) ((WT)(w))->at	438	#define ev_at(w) ((WT)(w))->at
365		439
366	#if EV_USE_MONOTONIC	440	#if EV_USE_REALTIME
367	/* 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 */
368	/* 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
369	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? */
370	#endif	448	#endif
371		449
372	#ifdef _WIN32	450	#ifdef _WIN32
373	# include "ev_win32.c"	451	# include "ev_win32.c"
…		…
382	{	460	{
383	syserr_cb = cb;	461	syserr_cb = cb;
384	}	462	}
385		463
386	static void noinline	464	static void noinline
387	syserr (const char *msg)	465	ev_syserr (const char *msg)
388	{	466	{
389	if (!msg)	467	if (!msg)
390	msg = "(libev) system error";	468	msg = "(libev) system error";
391		469
392	if (syserr_cb)	470	if (syserr_cb)
…		…
438	#define ev_malloc(size) ev_realloc (0, (size))	516	#define ev_malloc(size) ev_realloc (0, (size))
439	#define ev_free(ptr) ev_realloc ((ptr), 0)	517	#define ev_free(ptr) ev_realloc ((ptr), 0)
440		518
441	/*****************************************************************************/	519	/*****************************************************************************/
442		520
		521	/* set in reify when reification needed */
		522	#define EV_ANFD_REIFY 1
		523
		524	/* file descriptor info structure */
443	typedef struct	525	typedef struct
444	{	526	{
445	WL head;	527	WL head;
446	unsigned char events;	528	unsigned char events; /* the events watched for */
		529	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
		530	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
447	unsigned char reify;	531	unsigned char unused;
		532	#if EV_USE_EPOLL
		533	unsigned int egen; /* generation counter to counter epoll bugs */
		534	#endif
448	#if EV_SELECT_IS_WINSOCKET	535	#if EV_SELECT_IS_WINSOCKET
449	SOCKET handle;	536	SOCKET handle;
450	#endif	537	#endif
451	} ANFD;	538	} ANFD;
452		539
		540	/* stores the pending event set for a given watcher */
453	typedef struct	541	typedef struct
454	{	542	{
455	W w;	543	W w;
456	int events;	544	int events; /* the pending event set for the given watcher */
457	} ANPENDING;	545	} ANPENDING;
458		546
459	#if EV_USE_INOTIFY	547	#if EV_USE_INOTIFY
460	/* hash table entry per inotify-id */	548	/* hash table entry per inotify-id */
461	typedef struct	549	typedef struct
…		…
464	} ANFS;	552	} ANFS;
465	#endif	553	#endif
466		554
467	/* Heap Entry */	555	/* Heap Entry */
468	#if EV_HEAP_CACHE_AT	556	#if EV_HEAP_CACHE_AT
		557	/* a heap element */
469	typedef struct {	558	typedef struct {
470	ev_tstamp at;	559	ev_tstamp at;
471	WT w;	560	WT w;
472	} ANHE;	561	} ANHE;
473		562
474	#define ANHE_w(he) (he).w /* access watcher, read-write */	563	#define ANHE_w(he) (he).w /* access watcher, read-write */
475	#define ANHE_at(he) (he).at /* access cached at, read-only */	564	#define ANHE_at(he) (he).at /* access cached at, read-only */
476	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */	565	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
477	#else	566	#else
		567	/* a heap element */
478	typedef WT ANHE;	568	typedef WT ANHE;
479		569
480	#define ANHE_w(he) (he)	570	#define ANHE_w(he) (he)
481	#define ANHE_at(he) (he)->at	571	#define ANHE_at(he) (he)->at
482	#define ANHE_at_cache(he)	572	#define ANHE_at_cache(he)
…		…
506		596
507	static int ev_default_loop_ptr;	597	static int ev_default_loop_ptr;
508		598
509	#endif	599	#endif
510		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
511	/*****************************************************************************/	613	/*****************************************************************************/
512		614
		615	#ifndef EV_HAVE_EV_TIME
513	ev_tstamp	616	ev_tstamp
514	ev_time (void)	617	ev_time (void)
515	{	618	{
516	#if EV_USE_REALTIME	619	#if EV_USE_REALTIME
		620	if (expect_true (have_realtime))
		621	{
517	struct timespec ts;	622	struct timespec ts;
518	clock_gettime (CLOCK_REALTIME, &ts);	623	clock_gettime (CLOCK_REALTIME, &ts);
519	return ts.tv_sec + ts.tv_nsec * 1e-9;	624	return ts.tv_sec + ts.tv_nsec * 1e-9;
520	#else	625	}
		626	#endif
		627
521	struct timeval tv;	628	struct timeval tv;
522	gettimeofday (&tv, 0);	629	gettimeofday (&tv, 0);
523	return tv.tv_sec + tv.tv_usec * 1e-6;	630	return tv.tv_sec + tv.tv_usec * 1e-6;
524	#endif
525	}	631	}
		632	#endif
526		633
527	ev_tstamp inline_size	634	inline_size ev_tstamp
528	get_clock (void)	635	get_clock (void)
529	{	636	{
530	#if EV_USE_MONOTONIC	637	#if EV_USE_MONOTONIC
531	if (expect_true (have_monotonic))	638	if (expect_true (have_monotonic))
532	{	639	{
…		…
566		673
567	tv.tv_sec = (time_t)delay;	674	tv.tv_sec = (time_t)delay;
568	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	675	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
569		676
570	/* 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 */
571	/* somehting nto guaranteed by newer posix versions, but guaranteed */	678	/* something not guaranteed by newer posix versions, but guaranteed */
572	/* by older ones */	679	/* by older ones */
573	select (0, 0, 0, 0, &tv);	680	select (0, 0, 0, 0, &tv);
574	#endif	681	#endif
575	}	682	}
576	}	683	}
577		684
578	/*****************************************************************************/	685	/*****************************************************************************/
579		686
580	#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 */
581		688
582	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
583	array_nextsize (int elem, int cur, int cnt)	692	array_nextsize (int elem, int cur, int cnt)
584	{	693	{
585	int ncur = cur + 1;	694	int ncur = cur + 1;
586		695
587	do	696	do
…		…
604	array_realloc (int elem, void *base, int *cur, int cnt)	713	array_realloc (int elem, void *base, int *cur, int cnt)
605	{	714	{
606	*cur = array_nextsize (elem, *cur, cnt);	715	*cur = array_nextsize (elem, *cur, cnt);
607	return ev_realloc (base, elem * *cur);	716	return ev_realloc (base, elem * *cur);
608	}	717	}
		718
		719	#define array_init_zero(base,count) \
		720	memset ((void *)(base), 0, sizeof (*(base)) * (count))
609		721
610	#define array_needsize(type,base,cur,cnt,init) \	722	#define array_needsize(type,base,cur,cnt,init) \
611	if (expect_false ((cnt) > (cur))) \	723	if (expect_false ((cnt) > (cur))) \
612	{ \	724	{ \
613	int ocur_ = (cur); \	725	int ocur_ = (cur); \
…		…
625	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	737	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
626	}	738	}
627	#endif	739	#endif
628		740
629	#define array_free(stem, idx) \	741	#define array_free(stem, idx) \
630	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
631		743
632	/*****************************************************************************/	744	/*****************************************************************************/
		745
		746	/* dummy callback for pending events */
		747	static void noinline
		748	pendingcb (EV_P_ ev_prepare *w, int revents)
		749	{
		750	}
633		751
634	void noinline	752	void noinline
635	ev_feed_event (EV_P_ void *w, int revents)	753	ev_feed_event (EV_P_ void *w, int revents)
636	{	754	{
637	W w_ = (W)w;	755	W w_ = (W)w;
…		…
646	pendings [pri][w_->pending - 1].w = w_;	764	pendings [pri][w_->pending - 1].w = w_;
647	pendings [pri][w_->pending - 1].events = revents;	765	pendings [pri][w_->pending - 1].events = revents;
648	}	766	}
649	}	767	}
650		768
651	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
652	queue_events (EV_P_ W *events, int eventcnt, int type)	785	queue_events (EV_P_ W *events, int eventcnt, int type)
653	{	786	{
654	int i;	787	int i;
655		788
656	for (i = 0; i < eventcnt; ++i)	789	for (i = 0; i < eventcnt; ++i)
657	ev_feed_event (EV_A_ events [i], type);	790	ev_feed_event (EV_A_ events [i], type);
658	}	791	}
659		792
660	/*****************************************************************************/	793	/*****************************************************************************/
661		794
662	void inline_size	795	inline_speed void
663	anfds_init (ANFD *base, int count)
664	{
665	while (count--)
666	{
667	base->head = 0;
668	base->events = EV_NONE;
669	base->reify = 0;
670
671	++base;
672	}
673	}
674
675	void inline_speed
676	fd_event (EV_P_ int fd, int revents)	796	fd_event_nc (EV_P_ int fd, int revents)
677	{	797	{
678	ANFD *anfd = anfds + fd;	798	ANFD *anfd = anfds + fd;
679	ev_io *w;	799	ev_io *w;
680		800
681	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)
…		…
685	if (ev)	805	if (ev)
686	ev_feed_event (EV_A_ (W)w, ev);	806	ev_feed_event (EV_A_ (W)w, ev);
687	}	807	}
688	}	808	}
689		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
690	void	821	void
691	ev_feed_fd_event (EV_P_ int fd, int revents)	822	ev_feed_fd_event (EV_P_ int fd, int revents)
692	{	823	{
693	if (fd >= 0 && fd < anfdmax)	824	if (fd >= 0 && fd < anfdmax)
694	fd_event (EV_A_ fd, revents);	825	fd_event_nc (EV_A_ fd, revents);
695	}	826	}
696		827
697	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
698	fd_reify (EV_P)	831	fd_reify (EV_P)
699	{	832	{
700	int i;	833	int i;
701		834
702	for (i = 0; i < fdchangecnt; ++i)	835	for (i = 0; i < fdchangecnt; ++i)
…		…
717	#ifdef EV_FD_TO_WIN32_HANDLE	850	#ifdef EV_FD_TO_WIN32_HANDLE
718	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	851	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
719	#else	852	#else
720	anfd->handle = _get_osfhandle (fd);	853	anfd->handle = _get_osfhandle (fd);
721	#endif	854	#endif
722	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));
723	}	856	}
724	#endif	857	#endif
725		858
726	{	859	{
727	unsigned char o_events = anfd->events;	860	unsigned char o_events = anfd->events;
728	unsigned char o_reify = anfd->reify;	861	unsigned char o_reify = anfd->reify;
729		862
730	anfd->reify = 0;	863	anfd->reify = 0;
731	anfd->events = events;	864	anfd->events = events;
732		865
733	if (o_events != events || o_reify & EV_IOFDSET)	866	if (o_events != events || o_reify & EV__IOFDSET)
734	backend_modify (EV_A_ fd, o_events, events);	867	backend_modify (EV_A_ fd, o_events, events);
735	}	868	}
736	}	869	}
737		870
738	fdchangecnt = 0;	871	fdchangecnt = 0;
739	}	872	}
740		873
741	void inline_size	874	/* something about the given fd changed */
		875	inline_size void
742	fd_change (EV_P_ int fd, int flags)	876	fd_change (EV_P_ int fd, int flags)
743	{	877	{
744	unsigned char reify = anfds [fd].reify;	878	unsigned char reify = anfds [fd].reify;
745	anfds [fd].reify |= flags;	879	anfds [fd].reify |= flags;
746		880
…		…
750	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	884	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
751	fdchanges [fdchangecnt - 1] = fd;	885	fdchanges [fdchangecnt - 1] = fd;
752	}	886	}
753	}	887	}
754		888
755	void inline_speed	889	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		890	inline_speed void
756	fd_kill (EV_P_ int fd)	891	fd_kill (EV_P_ int fd)
757	{	892	{
758	ev_io *w;	893	ev_io *w;
759		894
760	while ((w = (ev_io *)anfds [fd].head))	895	while ((w = (ev_io *)anfds [fd].head))
…		…
762	ev_io_stop (EV_A_ w);	897	ev_io_stop (EV_A_ w);
763	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);
764	}	899	}
765	}	900	}
766		901
767	int inline_size	902	/* check whether the given fd is atcually valid, for error recovery */
		903	inline_size int
768	fd_valid (int fd)	904	fd_valid (int fd)
769	{	905	{
770	#ifdef _WIN32	906	#ifdef _WIN32
771	return _get_osfhandle (fd) != -1;	907	return _get_osfhandle (fd) != -1;
772	#else	908	#else
…		…
808		944
809	for (fd = 0; fd < anfdmax; ++fd)	945	for (fd = 0; fd < anfdmax; ++fd)
810	if (anfds [fd].events)	946	if (anfds [fd].events)
811	{	947	{
812	anfds [fd].events = 0;	948	anfds [fd].events = 0;
		949	anfds [fd].emask = 0;
813	fd_change (EV_A_ fd, EV_IOFDSET | 1);	950	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
814	}	951	}
815	}	952	}
816		953
817	/*****************************************************************************/	954	/*****************************************************************************/
818		955
…		…
834	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	971	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
835	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	972	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
836	#define UPHEAP_DONE(p,k) ((p) == (k))	973	#define UPHEAP_DONE(p,k) ((p) == (k))
837		974
838	/* away from the root */	975	/* away from the root */
839	void inline_speed	976	inline_speed void
840	downheap (ANHE *heap, int N, int k)	977	downheap (ANHE *heap, int N, int k)
841	{	978	{
842	ANHE he = heap [k];	979	ANHE he = heap [k];
843	ANHE *E = heap + N + HEAP0;	980	ANHE *E = heap + N + HEAP0;
844		981
…		…
884	#define HEAP0 1	1021	#define HEAP0 1
885	#define HPARENT(k) ((k) >> 1)	1022	#define HPARENT(k) ((k) >> 1)
886	#define UPHEAP_DONE(p,k) (!(p))	1023	#define UPHEAP_DONE(p,k) (!(p))
887		1024
888	/* away from the root */	1025	/* away from the root */
889	void inline_speed	1026	inline_speed void
890	downheap (ANHE *heap, int N, int k)	1027	downheap (ANHE *heap, int N, int k)
891	{	1028	{
892	ANHE he = heap [k];	1029	ANHE he = heap [k];
893		1030
894	for (;;)	1031	for (;;)
…		…
914	ev_active (ANHE_w (he)) = k;	1051	ev_active (ANHE_w (he)) = k;
915	}	1052	}
916	#endif	1053	#endif
917		1054
918	/* towards the root */	1055	/* towards the root */
919	void inline_speed	1056	inline_speed void
920	upheap (ANHE *heap, int k)	1057	upheap (ANHE *heap, int k)
921	{	1058	{
922	ANHE he = heap [k];	1059	ANHE he = heap [k];
923		1060
924	for (;;)	1061	for (;;)
…		…
935		1072
936	heap [k] = he;	1073	heap [k] = he;
937	ev_active (ANHE_w (he)) = k;	1074	ev_active (ANHE_w (he)) = k;
938	}	1075	}
939		1076
940	void inline_size	1077	/* move an element suitably so it is in a correct place */
		1078	inline_size void
941	adjustheap (ANHE *heap, int N, int k)	1079	adjustheap (ANHE *heap, int N, int k)
942	{	1080	{
943	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]))
944	upheap (heap, k);	1082	upheap (heap, k);
945	else	1083	else
946	downheap (heap, N, k);	1084	downheap (heap, N, k);
947	}	1085	}
948		1086
949	/* 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 */
950	void inline_size	1088	inline_size void
951	reheap (ANHE *heap, int N)	1089	reheap (ANHE *heap, int N)
952	{	1090	{
953	int i;	1091	int i;
954		1092
955	/* 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 */
…		…
958	upheap (heap, i + HEAP0);	1096	upheap (heap, i + HEAP0);
959	}	1097	}
960		1098
961	/*****************************************************************************/	1099	/*****************************************************************************/
962		1100
		1101	/* associate signal watchers to a signal signal */
963	typedef struct	1102	typedef struct
964	{	1103	{
965	WL head;	1104	WL head;
966	EV_ATOMIC_T gotsig;	1105	EV_ATOMIC_T gotsig;
967	} ANSIG;	1106	} ANSIG;
…		…
969	static ANSIG *signals;	1108	static ANSIG *signals;
970	static int signalmax;	1109	static int signalmax;
971		1110
972	static EV_ATOMIC_T gotsig;	1111	static EV_ATOMIC_T gotsig;
973		1112
974	void inline_size
975	signals_init (ANSIG *base, int count)
976	{
977	while (count--)
978	{
979	base->head = 0;
980	base->gotsig = 0;
981
982	++base;
983	}
984	}
985
986	/*****************************************************************************/	1113	/*****************************************************************************/
987		1114
988	void inline_speed	1115	/* used to prepare libev internal fd's */
		1116	/* this is not fork-safe */
		1117	inline_speed void
989	fd_intern (int fd)	1118	fd_intern (int fd)
990	{	1119	{
991	#ifdef _WIN32	1120	#ifdef _WIN32
992	unsigned long arg = 1;	1121	unsigned long arg = 1;
993	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1122	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
998	}	1127	}
999		1128
1000	static void noinline	1129	static void noinline
1001	evpipe_init (EV_P)	1130	evpipe_init (EV_P)
1002	{	1131	{
1003	if (!ev_is_active (&pipeev))	1132	if (!ev_is_active (&pipe_w))
1004	{	1133	{
1005	#if EV_USE_EVENTFD	1134	#if EV_USE_EVENTFD
		1135	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1136	if (evfd < 0 && errno == EINVAL)
1006	if ((evfd = eventfd (0, 0)) >= 0)	1137	evfd = eventfd (0, 0);
		1138
		1139	if (evfd >= 0)
1007	{	1140	{
1008	evpipe [0] = -1;	1141	evpipe [0] = -1;
1009	fd_intern (evfd);	1142	fd_intern (evfd); /* doing it twice doesn't hurt */
1010	ev_io_set (&pipeev, evfd, EV_READ);	1143	ev_io_set (&pipe_w, evfd, EV_READ);
1011	}	1144	}
1012	else	1145	else
1013	#endif	1146	#endif
1014	{	1147	{
1015	while (pipe (evpipe))	1148	while (pipe (evpipe))
1016	syserr ("(libev) error creating signal/async pipe");	1149	ev_syserr ("(libev) error creating signal/async pipe");
1017		1150
1018	fd_intern (evpipe [0]);	1151	fd_intern (evpipe [0]);
1019	fd_intern (evpipe [1]);	1152	fd_intern (evpipe [1]);
1020	ev_io_set (&pipeev, evpipe [0], EV_READ);	1153	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1021	}	1154	}
1022		1155
1023	ev_io_start (EV_A_ &pipeev);	1156	ev_io_start (EV_A_ &pipe_w);
1024	ev_unref (EV_A); /* watcher should not keep loop alive */	1157	ev_unref (EV_A); /* watcher should not keep loop alive */
1025	}	1158	}
1026	}	1159	}
1027		1160
1028	void inline_size	1161	inline_size void
1029	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1162	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1030	{	1163	{
1031	if (!*flag)	1164	if (!*flag)
1032	{	1165	{
1033	int old_errno = errno; /* save errno because write might clobber it */	1166	int old_errno = errno; /* save errno because write might clobber it */
…		…
1046		1179
1047	errno = old_errno;	1180	errno = old_errno;
1048	}	1181	}
1049	}	1182	}
1050		1183
		1184	/* called whenever the libev signal pipe */
		1185	/* got some events (signal, async) */
1051	static void	1186	static void
1052	pipecb (EV_P_ ev_io *iow, int revents)	1187	pipecb (EV_P_ ev_io *iow, int revents)
1053	{	1188	{
1054	#if EV_USE_EVENTFD	1189	#if EV_USE_EVENTFD
1055	if (evfd >= 0)	1190	if (evfd >= 0)
…		…
1111	ev_feed_signal_event (EV_P_ int signum)	1246	ev_feed_signal_event (EV_P_ int signum)
1112	{	1247	{
1113	WL w;	1248	WL w;
1114		1249
1115	#if EV_MULTIPLICITY	1250	#if EV_MULTIPLICITY
1116	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));
1117	#endif	1252	#endif
1118		1253
1119	--signum;	1254	--signum;
1120		1255
1121	if (signum < 0 || signum >= signalmax)	1256	if (signum < 0 || signum >= signalmax)
…		…
1125		1260
1126	for (w = signals [signum].head; w; w = w->next)	1261	for (w = signals [signum].head; w; w = w->next)
1127	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1262	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1128	}	1263	}
1129		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
1130	/*****************************************************************************/	1285	/*****************************************************************************/
1131		1286
1132	static WL childs [EV_PID_HASHSIZE];	1287	static WL childs [EV_PID_HASHSIZE];
1133		1288
1134	#ifndef _WIN32	1289	#ifndef _WIN32
…		…
1137		1292
1138	#ifndef WIFCONTINUED	1293	#ifndef WIFCONTINUED
1139	# define WIFCONTINUED(status) 0	1294	# define WIFCONTINUED(status) 0
1140	#endif	1295	#endif
1141		1296
1142	void inline_speed	1297	/* handle a single child status event */
		1298	inline_speed void
1143	child_reap (EV_P_ int chain, int pid, int status)	1299	child_reap (EV_P_ int chain, int pid, int status)
1144	{	1300	{
1145	ev_child *w;	1301	ev_child *w;
1146	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1302	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1147		1303
…		…
1160		1316
1161	#ifndef WCONTINUED	1317	#ifndef WCONTINUED
1162	# define WCONTINUED 0	1318	# define WCONTINUED 0
1163	#endif	1319	#endif
1164		1320
		1321	/* called on sigchld etc., calls waitpid */
1165	static void	1322	static void
1166	childcb (EV_P_ ev_signal *sw, int revents)	1323	childcb (EV_P_ ev_signal *sw, int revents)
1167	{	1324	{
1168	int pid, status;	1325	int pid, status;
1169		1326
…		…
1250	/* kqueue is borked on everything but netbsd apparently */	1407	/* kqueue is borked on everything but netbsd apparently */
1251	/* 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 */
1252	flags &= ~EVBACKEND_KQUEUE;	1409	flags &= ~EVBACKEND_KQUEUE;
1253	#endif	1410	#endif
1254	#ifdef __APPLE__	1411	#ifdef __APPLE__
1255	// flags &= ~EVBACKEND_KQUEUE; for documentation	1412	/* only select works correctly on that "unix-certified" platform */
1256	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 */
1257	#endif	1415	#endif
1258		1416
1259	return flags;	1417	return flags;
1260	}	1418	}
1261		1419
…		…
1275	ev_backend (EV_P)	1433	ev_backend (EV_P)
1276	{	1434	{
1277	return backend;	1435	return backend;
1278	}	1436	}
1279		1437
		1438	#if EV_MINIMAL < 2
1280	unsigned int	1439	unsigned int
1281	ev_loop_count (EV_P)	1440	ev_loop_count (EV_P)
1282	{	1441	{
1283	return loop_count;	1442	return loop_count;
1284	}	1443	}
1285		1444
		1445	unsigned int
		1446	ev_loop_depth (EV_P)
		1447	{
		1448	return loop_depth;
		1449	}
		1450
1286	void	1451	void
1287	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1452	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1288	{	1453	{
1289	io_blocktime = interval;	1454	io_blocktime = interval;
1290	}	1455	}
…		…
1293	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1458	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1294	{	1459	{
1295	timeout_blocktime = interval;	1460	timeout_blocktime = interval;
1296	}	1461	}
1297		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 */
1298	static void noinline	1488	static void noinline
1299	loop_init (EV_P_ unsigned int flags)	1489	loop_init (EV_P_ unsigned int flags)
1300	{	1490	{
1301	if (!backend)	1491	if (!backend)
1302	{	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
1303	#if EV_USE_MONOTONIC	1503	#if EV_USE_MONOTONIC
		1504	if (!have_monotonic)
1304	{	1505	{
1305	struct timespec ts;	1506	struct timespec ts;
		1507
1306	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1508	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1307	have_monotonic = 1;	1509	have_monotonic = 1;
1308	}	1510	}
1309	#endif	1511	#endif
1310		1512
1311	ev_rt_now = ev_time ();	1513	ev_rt_now = ev_time ();
1312	mn_now = get_clock ();	1514	mn_now = get_clock ();
1313	now_floor = mn_now;	1515	now_floor = mn_now;
1314	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
1315		1520
1316	io_blocktime = 0.;	1521	io_blocktime = 0.;
1317	timeout_blocktime = 0.;	1522	timeout_blocktime = 0.;
1318	backend = 0;	1523	backend = 0;
1319	backend_fd = -1;	1524	backend_fd = -1;
1320	gotasync = 0;	1525	gotasync = 0;
1321	#if EV_USE_INOTIFY	1526	#if EV_USE_INOTIFY
1322	fs_fd = -2;	1527	fs_fd = -2;
1323	#endif	1528	#endif
		1529	#if EV_USE_SIGNALFD
		1530	sigfd = -2;
		1531	#endif
1324		1532
1325	/* pid check not overridable via env */	1533	/* pid check not overridable via env */
1326	#ifndef _WIN32	1534	#ifndef _WIN32
1327	if (flags & EVFLAG_FORKCHECK)	1535	if (flags & EVFLAG_FORKCHECK)
1328	curpid = getpid ();	1536	curpid = getpid ();
…		…
1350	#endif	1558	#endif
1351	#if EV_USE_SELECT	1559	#if EV_USE_SELECT
1352	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1560	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1353	#endif	1561	#endif
1354		1562
		1563	ev_prepare_init (&pending_w, pendingcb);
		1564
1355	ev_init (&pipeev, pipecb);	1565	ev_init (&pipe_w, pipecb);
1356	ev_set_priority (&pipeev, EV_MAXPRI);	1566	ev_set_priority (&pipe_w, EV_MAXPRI);
1357	}	1567	}
1358	}	1568	}
1359		1569
		1570	/* free up a loop structure */
1360	static void noinline	1571	static void noinline
1361	loop_destroy (EV_P)	1572	loop_destroy (EV_P)
1362	{	1573	{
1363	int i;	1574	int i;
1364		1575
1365	if (ev_is_active (&pipeev))	1576	if (ev_is_active (&pipe_w))
1366	{	1577	{
1367	ev_ref (EV_A); /* signal watcher */	1578	/*ev_ref (EV_A);*/
1368	ev_io_stop (EV_A_ &pipeev);	1579	/*ev_io_stop (EV_A_ &pipe_w);*/
1369		1580
1370	#if EV_USE_EVENTFD	1581	#if EV_USE_EVENTFD
1371	if (evfd >= 0)	1582	if (evfd >= 0)
1372	close (evfd);	1583	close (evfd);
1373	#endif	1584	#endif
…		…
1377	close (evpipe [0]);	1588	close (evpipe [0]);
1378	close (evpipe [1]);	1589	close (evpipe [1]);
1379	}	1590	}
1380	}	1591	}
1381		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
1382	#if EV_USE_INOTIFY	1603	#if EV_USE_INOTIFY
1383	if (fs_fd >= 0)	1604	if (fs_fd >= 0)
1384	close (fs_fd);	1605	close (fs_fd);
1385	#endif	1606	#endif
1386		1607
…		…
1412	}	1633	}
1413		1634
1414	ev_free (anfds); anfdmax = 0;	1635	ev_free (anfds); anfdmax = 0;
1415		1636
1416	/* 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);
1417	array_free (fdchange, EMPTY);	1639	array_free (fdchange, EMPTY);
1418	array_free (timer, EMPTY);	1640	array_free (timer, EMPTY);
1419	#if EV_PERIODIC_ENABLE	1641	#if EV_PERIODIC_ENABLE
1420	array_free (periodic, EMPTY);	1642	array_free (periodic, EMPTY);
1421	#endif	1643	#endif
…		…
1430		1652
1431	backend = 0;	1653	backend = 0;
1432	}	1654	}
1433		1655
1434	#if EV_USE_INOTIFY	1656	#if EV_USE_INOTIFY
1435	void inline_size infy_fork (EV_P);	1657	inline_size void infy_fork (EV_P);
1436	#endif	1658	#endif
1437		1659
1438	void inline_size	1660	inline_size void
1439	loop_fork (EV_P)	1661	loop_fork (EV_P)
1440	{	1662	{
1441	#if EV_USE_PORT	1663	#if EV_USE_PORT
1442	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1664	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1443	#endif	1665	#endif
…		…
1449	#endif	1671	#endif
1450	#if EV_USE_INOTIFY	1672	#if EV_USE_INOTIFY
1451	infy_fork (EV_A);	1673	infy_fork (EV_A);
1452	#endif	1674	#endif
1453		1675
1454	if (ev_is_active (&pipeev))	1676	if (ev_is_active (&pipe_w))
1455	{	1677	{
1456	/* this "locks" the handlers against writing to the pipe */	1678	/* this "locks" the handlers against writing to the pipe */
1457	/* while we modify the fd vars */	1679	/* while we modify the fd vars */
1458	gotsig = 1;	1680	gotsig = 1;
1459	#if EV_ASYNC_ENABLE	1681	#if EV_ASYNC_ENABLE
1460	gotasync = 1;	1682	gotasync = 1;
1461	#endif	1683	#endif
1462		1684
1463	ev_ref (EV_A);	1685	ev_ref (EV_A);
1464	ev_io_stop (EV_A_ &pipeev);	1686	ev_io_stop (EV_A_ &pipe_w);
1465		1687
1466	#if EV_USE_EVENTFD	1688	#if EV_USE_EVENTFD
1467	if (evfd >= 0)	1689	if (evfd >= 0)
1468	close (evfd);	1690	close (evfd);
1469	#endif	1691	#endif
…		…
1474	close (evpipe [1]);	1696	close (evpipe [1]);
1475	}	1697	}
1476		1698
1477	evpipe_init (EV_A);	1699	evpipe_init (EV_A);
1478	/* now iterate over everything, in case we missed something */	1700	/* now iterate over everything, in case we missed something */
1479	pipecb (EV_A_ &pipeev, EV_READ);	1701	pipecb (EV_A_ &pipe_w, EV_READ);
1480	}	1702	}
1481		1703
1482	postfork = 0;	1704	postfork = 0;
1483	}	1705	}
1484		1706
…		…
1488	ev_loop_new (unsigned int flags)	1710	ev_loop_new (unsigned int flags)
1489	{	1711	{
1490	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));
1491		1713
1492	memset (loop, 0, sizeof (struct ev_loop));	1714	memset (loop, 0, sizeof (struct ev_loop));
1493
1494	loop_init (EV_A_ flags);	1715	loop_init (EV_A_ flags);
1495		1716
1496	if (ev_backend (EV_A))	1717	if (ev_backend (EV_A))
1497	return loop;	1718	return loop;
1498		1719
…		…
1509	void	1730	void
1510	ev_loop_fork (EV_P)	1731	ev_loop_fork (EV_P)
1511	{	1732	{
1512	postfork = 1; /* must be in line with ev_default_fork */	1733	postfork = 1; /* must be in line with ev_default_fork */
1513	}	1734	}
		1735	#endif /* multiplicity */
1514		1736
1515	#if EV_VERIFY	1737	#if EV_VERIFY
1516	static void noinline	1738	static void noinline
1517	verify_watcher (EV_P_ W w)	1739	verify_watcher (EV_P_ W w)
1518	{	1740	{
1519	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	1741	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1520		1742
1521	if (w->pending)	1743	if (w->pending)
1522	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));
1523	}	1745	}
1524		1746
1525	static void noinline	1747	static void noinline
1526	verify_heap (EV_P_ ANHE *heap, int N)	1748	verify_heap (EV_P_ ANHE *heap, int N)
1527	{	1749	{
1528	int i;	1750	int i;
1529		1751
1530	for (i = HEAP0; i < N + HEAP0; ++i)	1752	for (i = HEAP0; i < N + HEAP0; ++i)
1531	{	1753	{
1532	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));
1533	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])));
1534	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]))));
1535		1757
1536	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	1758	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1537	}	1759	}
1538	}	1760	}
1539		1761
1540	static void noinline	1762	static void noinline
1541	array_verify (EV_P_ W *ws, int cnt)	1763	array_verify (EV_P_ W *ws, int cnt)
1542	{	1764	{
1543	while (cnt--)	1765	while (cnt--)
1544	{	1766	{
1545	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1767	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1546	verify_watcher (EV_A_ ws [cnt]);	1768	verify_watcher (EV_A_ ws [cnt]);
1547	}	1769	}
1548	}	1770	}
1549	#endif	1771	#endif
1550		1772
		1773	#if EV_MINIMAL < 2
1551	void	1774	void
1552	ev_loop_verify (EV_P)	1775	ev_loop_verify (EV_P)
1553	{	1776	{
1554	#if EV_VERIFY	1777	#if EV_VERIFY
1555	int i;	1778	int i;
…		…
1557		1780
1558	assert (activecnt >= -1);	1781	assert (activecnt >= -1);
1559		1782
1560	assert (fdchangemax >= fdchangecnt);	1783	assert (fdchangemax >= fdchangecnt);
1561	for (i = 0; i < fdchangecnt; ++i)	1784	for (i = 0; i < fdchangecnt; ++i)
1562	assert (("negative fd in fdchanges", fdchanges [i] >= 0));	1785	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1563		1786
1564	assert (anfdmax >= 0);	1787	assert (anfdmax >= 0);
1565	for (i = 0; i < anfdmax; ++i)	1788	for (i = 0; i < anfdmax; ++i)
1566	for (w = anfds [i].head; w; w = w->next)	1789	for (w = anfds [i].head; w; w = w->next)
1567	{	1790	{
1568	verify_watcher (EV_A_ (W)w);	1791	verify_watcher (EV_A_ (W)w);
1569	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));	1792	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1570	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));	1793	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1571	}	1794	}
1572		1795
1573	assert (timermax >= timercnt);	1796	assert (timermax >= timercnt);
1574	verify_heap (EV_A_ timers, timercnt);	1797	verify_heap (EV_A_ timers, timercnt);
1575		1798
…		…
1608	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)
1609	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)	1832	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1610	# endif	1833	# endif
1611	#endif	1834	#endif
1612	}	1835	}
1613		1836	#endif
1614	#endif /* multiplicity */
1615		1837
1616	#if EV_MULTIPLICITY	1838	#if EV_MULTIPLICITY
1617	struct ev_loop *	1839	struct ev_loop *
1618	ev_default_loop_init (unsigned int flags)	1840	ev_default_loop_init (unsigned int flags)
1619	#else	1841	#else
…		…
1652	{	1874	{
1653	#if EV_MULTIPLICITY	1875	#if EV_MULTIPLICITY
1654	struct ev_loop *loop = ev_default_loop_ptr;	1876	struct ev_loop *loop = ev_default_loop_ptr;
1655	#endif	1877	#endif
1656		1878
		1879	ev_default_loop_ptr = 0;
		1880
1657	#ifndef _WIN32	1881	#ifndef _WIN32
1658	ev_ref (EV_A); /* child watcher */	1882	ev_ref (EV_A); /* child watcher */
1659	ev_signal_stop (EV_A_ &childev);	1883	ev_signal_stop (EV_A_ &childev);
1660	#endif	1884	#endif
1661		1885
…		…
1667	{	1891	{
1668	#if EV_MULTIPLICITY	1892	#if EV_MULTIPLICITY
1669	struct ev_loop *loop = ev_default_loop_ptr;	1893	struct ev_loop *loop = ev_default_loop_ptr;
1670	#endif	1894	#endif
1671		1895
1672	if (backend)
1673	postfork = 1; /* must be in line with ev_loop_fork */	1896	postfork = 1; /* must be in line with ev_loop_fork */
1674	}	1897	}
1675		1898
1676	/*****************************************************************************/	1899	/*****************************************************************************/
1677		1900
1678	void	1901	void
1679	ev_invoke (EV_P_ void *w, int revents)	1902	ev_invoke (EV_P_ void *w, int revents)
1680	{	1903	{
1681	EV_CB_INVOKE ((W)w, revents);	1904	EV_CB_INVOKE ((W)w, revents);
1682	}	1905	}
1683		1906
1684	void inline_speed	1907	unsigned int
1685	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)
1686	{	1921	{
1687	int pri;	1922	int pri;
1688		1923
1689	for (pri = NUMPRI; pri--; )	1924	for (pri = NUMPRI; pri--; )
1690	while (pendingcnt [pri])	1925	while (pendingcnt [pri])
1691	{	1926	{
1692	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1927	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1693		1928
1694	if (expect_true (p->w))
1695	{
1696	/*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 */
1697		1931
1698	p->w->pending = 0;	1932	p->w->pending = 0;
1699	EV_CB_INVOKE (p->w, p->events);	1933	EV_CB_INVOKE (p->w, p->events);
1700	EV_FREQUENT_CHECK;	1934	EV_FREQUENT_CHECK;
1701	}
1702	}	1935	}
1703	}	1936	}
1704		1937
1705	#if EV_IDLE_ENABLE	1938	#if EV_IDLE_ENABLE
1706	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
1707	idle_reify (EV_P)	1942	idle_reify (EV_P)
1708	{	1943	{
1709	if (expect_false (idleall))	1944	if (expect_false (idleall))
1710	{	1945	{
1711	int pri;	1946	int pri;
…		…
1723	}	1958	}
1724	}	1959	}
1725	}	1960	}
1726	#endif	1961	#endif
1727		1962
1728	void inline_size	1963	/* make timers pending */
		1964	inline_size void
1729	timers_reify (EV_P)	1965	timers_reify (EV_P)
1730	{	1966	{
1731	EV_FREQUENT_CHECK;	1967	EV_FREQUENT_CHECK;
1732		1968
1733	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1969	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1734	{	1970	{
1735	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1971	do
1736
1737	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1738
1739	/* first reschedule or stop timer */
1740	if (w->repeat)
1741	{	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	{
1742	ev_at (w) += w->repeat;	1980	ev_at (w) += w->repeat;
1743	if (ev_at (w) < mn_now)	1981	if (ev_at (w) < mn_now)
1744	ev_at (w) = mn_now;	1982	ev_at (w) = mn_now;
1745		1983
1746	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.));
1747		1985
1748	ANHE_at_cache (timers [HEAP0]);	1986	ANHE_at_cache (timers [HEAP0]);
1749	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);
1750	}	1994	}
1751	else	1995	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1752	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1753		1996
1754	EV_FREQUENT_CHECK;
1755	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1997	feed_reverse_done (EV_A_ EV_TIMEOUT);
1756	}	1998	}
1757	}	1999	}
1758		2000
1759	#if EV_PERIODIC_ENABLE	2001	#if EV_PERIODIC_ENABLE
1760	void inline_size	2002	/* make periodics pending */
		2003	inline_size void
1761	periodics_reify (EV_P)	2004	periodics_reify (EV_P)
1762	{	2005	{
1763	EV_FREQUENT_CHECK;	2006	EV_FREQUENT_CHECK;
1764		2007
1765	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	2008	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1766	{	2009	{
1767	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	2010	int feed_count = 0;
1768		2011
1769	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	2012	do
1770
1771	/* first reschedule or stop timer */
1772	if (w->reschedule_cb)
1773	{	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	{
1774	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2021	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1775		2022
1776	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));
1777		2024
1778	ANHE_at_cache (periodics [HEAP0]);	2025	ANHE_at_cache (periodics [HEAP0]);
1779	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);
1780	}	2052	}
1781	else if (w->interval)	2053	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1782	{
1783	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1784	/* if next trigger time is not sufficiently in the future, put it there */
1785	/* this might happen because of floating point inexactness */
1786	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1787	{
1788	ev_at (w) += w->interval;
1789		2054
1790	/* if interval is unreasonably low we might still have a time in the past */
1791	/* so correct this. this will make the periodic very inexact, but the user */
1792	/* has effectively asked to get triggered more often than possible */
1793	if (ev_at (w) < ev_rt_now)
1794	ev_at (w) = ev_rt_now;
1795	}
1796
1797	ANHE_at_cache (periodics [HEAP0]);
1798	downheap (periodics, periodiccnt, HEAP0);
1799	}
1800	else
1801	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1802
1803	EV_FREQUENT_CHECK;
1804	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	2055	feed_reverse_done (EV_A_ EV_PERIODIC);
1805	}	2056	}
1806	}	2057	}
1807		2058
		2059	/* simply recalculate all periodics */
		2060	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1808	static void noinline	2061	static void noinline
1809	periodics_reschedule (EV_P)	2062	periodics_reschedule (EV_P)
1810	{	2063	{
1811	int i;	2064	int i;
1812		2065
…		…
1825		2078
1826	reheap (periodics, periodiccnt);	2079	reheap (periodics, periodiccnt);
1827	}	2080	}
1828	#endif	2081	#endif
1829		2082
1830	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
1831	time_update (EV_P_ ev_tstamp max_block)	2100	time_update (EV_P_ ev_tstamp max_block)
1832	{	2101	{
1833	int i;
1834
1835	#if EV_USE_MONOTONIC	2102	#if EV_USE_MONOTONIC
1836	if (expect_true (have_monotonic))	2103	if (expect_true (have_monotonic))
1837	{	2104	{
		2105	int i;
1838	ev_tstamp odiff = rtmn_diff;	2106	ev_tstamp odiff = rtmn_diff;
1839		2107
1840	mn_now = get_clock ();	2108	mn_now = get_clock ();
1841		2109
1842	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	2110	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1868	ev_rt_now = ev_time ();	2136	ev_rt_now = ev_time ();
1869	mn_now = get_clock ();	2137	mn_now = get_clock ();
1870	now_floor = mn_now;	2138	now_floor = mn_now;
1871	}	2139	}
1872		2140
		2141	/* no timer adjustment, as the monotonic clock doesn't jump */
		2142	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1873	# if EV_PERIODIC_ENABLE	2143	# if EV_PERIODIC_ENABLE
1874	periodics_reschedule (EV_A);	2144	periodics_reschedule (EV_A);
1875	# endif	2145	# endif
1876	/* no timer adjustment, as the monotonic clock doesn't jump */
1877	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1878	}	2146	}
1879	else	2147	else
1880	#endif	2148	#endif
1881	{	2149	{
1882	ev_rt_now = ev_time ();	2150	ev_rt_now = ev_time ();
1883		2151
1884	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))
1885	{	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);
1886	#if EV_PERIODIC_ENABLE	2156	#if EV_PERIODIC_ENABLE
1887	periodics_reschedule (EV_A);	2157	periodics_reschedule (EV_A);
1888	#endif	2158	#endif
1889	/* adjust timers. this is easy, as the offset is the same for all of them */
1890	for (i = 0; i < timercnt; ++i)
1891	{
1892	ANHE *he = timers + i + HEAP0;
1893	ANHE_w (*he)->at += ev_rt_now - mn_now;
1894	ANHE_at_cache (*he);
1895	}
1896	}	2159	}
1897		2160
1898	mn_now = ev_rt_now;	2161	mn_now = ev_rt_now;
1899	}	2162	}
1900	}	2163	}
1901		2164
1902	void	2165	void
1903	ev_ref (EV_P)
1904	{
1905	++activecnt;
1906	}
1907
1908	void
1909	ev_unref (EV_P)
1910	{
1911	--activecnt;
1912	}
1913
1914	void
1915	ev_now_update (EV_P)
1916	{
1917	time_update (EV_A_ 1e100);
1918	}
1919
1920	static int loop_done;
1921
1922	void
1923	ev_loop (EV_P_ int flags)	2166	ev_loop (EV_P_ int flags)
1924	{	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
1925	loop_done = EVUNLOOP_CANCEL;	2174	loop_done = EVUNLOOP_CANCEL;
1926		2175
1927	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 */
1928		2177
1929	do	2178	do
1930	{	2179	{
1931	#if EV_VERIFY >= 2	2180	#if EV_VERIFY >= 2
1932	ev_loop_verify (EV_A);	2181	ev_loop_verify (EV_A);
…		…
1945	/* we might have forked, so queue fork handlers */	2194	/* we might have forked, so queue fork handlers */
1946	if (expect_false (postfork))	2195	if (expect_false (postfork))
1947	if (forkcnt)	2196	if (forkcnt)
1948	{	2197	{
1949	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2198	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1950	call_pending (EV_A);	2199	EV_INVOKE_PENDING;
1951	}	2200	}
1952	#endif	2201	#endif
1953		2202
1954	/* queue prepare watchers (and execute them) */	2203	/* queue prepare watchers (and execute them) */
1955	if (expect_false (preparecnt))	2204	if (expect_false (preparecnt))
1956	{	2205	{
1957	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2206	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1958	call_pending (EV_A);	2207	EV_INVOKE_PENDING;
1959	}	2208	}
1960		2209
1961	if (expect_false (!activecnt))	2210	if (expect_false (loop_done))
1962	break;	2211	break;
1963		2212
1964	/* we might have forked, so reify kernel state if necessary */	2213	/* we might have forked, so reify kernel state if necessary */
1965	if (expect_false (postfork))	2214	if (expect_false (postfork))
1966	loop_fork (EV_A);	2215	loop_fork (EV_A);
…		…
1973	ev_tstamp waittime = 0.;	2222	ev_tstamp waittime = 0.;
1974	ev_tstamp sleeptime = 0.;	2223	ev_tstamp sleeptime = 0.;
1975		2224
1976	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2225	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1977	{	2226	{
		2227	/* remember old timestamp for io_blocktime calculation */
		2228	ev_tstamp prev_mn_now = mn_now;
		2229
1978	/* update time to cancel out callback processing overhead */	2230	/* update time to cancel out callback processing overhead */
1979	time_update (EV_A_ 1e100);	2231	time_update (EV_A_ 1e100);
1980		2232
1981	waittime = MAX_BLOCKTIME;	2233	waittime = MAX_BLOCKTIME;
1982		2234
…		…
1992	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;
1993	if (waittime > to) waittime = to;	2245	if (waittime > to) waittime = to;
1994	}	2246	}
1995	#endif	2247	#endif
1996		2248
		2249	/* don't let timeouts decrease the waittime below timeout_blocktime */
1997	if (expect_false (waittime < timeout_blocktime))	2250	if (expect_false (waittime < timeout_blocktime))
1998	waittime = timeout_blocktime;	2251	waittime = timeout_blocktime;
1999		2252
2000	sleeptime = waittime - backend_fudge;	2253	/* extra check because io_blocktime is commonly 0 */
2001
2002	if (expect_true (sleeptime > io_blocktime))	2254	if (expect_false (io_blocktime))
2003	sleeptime = io_blocktime;
2004
2005	if (sleeptime)
2006	{	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	{
2007	ev_sleep (sleeptime);	2263	ev_sleep (sleeptime);
2008	waittime -= sleeptime;	2264	waittime -= sleeptime;
		2265	}
2009	}	2266	}
2010	}	2267	}
2011		2268
		2269	#if EV_MINIMAL < 2
2012	++loop_count;	2270	++loop_count;
		2271	#endif
		2272	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2013	backend_poll (EV_A_ waittime);	2273	backend_poll (EV_A_ waittime);
		2274	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2014		2275
2015	/* update ev_rt_now, do magic */	2276	/* update ev_rt_now, do magic */
2016	time_update (EV_A_ waittime + sleeptime);	2277	time_update (EV_A_ waittime + sleeptime);
2017	}	2278	}
2018		2279
…		…
2029		2290
2030	/* queue check watchers, to be executed first */	2291	/* queue check watchers, to be executed first */
2031	if (expect_false (checkcnt))	2292	if (expect_false (checkcnt))
2032	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2293	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2033		2294
2034	call_pending (EV_A);	2295	EV_INVOKE_PENDING;
2035	}	2296	}
2036	while (expect_true (	2297	while (expect_true (
2037	activecnt	2298	activecnt
2038	&& !loop_done	2299	&& !loop_done
2039	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2300	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2040	));	2301	));
2041		2302
2042	if (loop_done == EVUNLOOP_ONE)	2303	if (loop_done == EVUNLOOP_ONE)
2043	loop_done = EVUNLOOP_CANCEL;	2304	loop_done = EVUNLOOP_CANCEL;
		2305
		2306	#if EV_MINIMAL < 2
		2307	--loop_depth;
		2308	#endif
2044	}	2309	}
2045		2310
2046	void	2311	void
2047	ev_unloop (EV_P_ int how)	2312	ev_unloop (EV_P_ int how)
2048	{	2313	{
2049	loop_done = how;	2314	loop_done = how;
2050	}	2315	}
2051		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
2052	/*****************************************************************************/	2354	/*****************************************************************************/
		2355	/* singly-linked list management, used when the expected list length is short */
2053		2356
2054	void inline_size	2357	inline_size void
2055	wlist_add (WL *head, WL elem)	2358	wlist_add (WL *head, WL elem)
2056	{	2359	{
2057	elem->next = *head;	2360	elem->next = *head;
2058	*head = elem;	2361	*head = elem;
2059	}	2362	}
2060		2363
2061	void inline_size	2364	inline_size void
2062	wlist_del (WL *head, WL elem)	2365	wlist_del (WL *head, WL elem)
2063	{	2366	{
2064	while (*head)	2367	while (*head)
2065	{	2368	{
2066	if (*head == elem)	2369	if (*head == elem)
…		…
2071		2374
2072	head = &(*head)->next;	2375	head = &(*head)->next;
2073	}	2376	}
2074	}	2377	}
2075		2378
2076	void inline_speed	2379	/* internal, faster, version of ev_clear_pending */
		2380	inline_speed void
2077	clear_pending (EV_P_ W w)	2381	clear_pending (EV_P_ W w)
2078	{	2382	{
2079	if (w->pending)	2383	if (w->pending)
2080	{	2384	{
2081	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2385	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2082	w->pending = 0;	2386	w->pending = 0;
2083	}	2387	}
2084	}	2388	}
2085		2389
2086	int	2390	int
…		…
2090	int pending = w_->pending;	2394	int pending = w_->pending;
2091		2395
2092	if (expect_true (pending))	2396	if (expect_true (pending))
2093	{	2397	{
2094	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2398	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2399	p->w = (W)&pending_w;
2095	w_->pending = 0;	2400	w_->pending = 0;
2096	p->w = 0;
2097	return p->events;	2401	return p->events;
2098	}	2402	}
2099	else	2403	else
2100	return 0;	2404	return 0;
2101	}	2405	}
2102		2406
2103	void inline_size	2407	inline_size void
2104	pri_adjust (EV_P_ W w)	2408	pri_adjust (EV_P_ W w)
2105	{	2409	{
2106	int pri = w->priority;	2410	int pri = ev_priority (w);
2107	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2411	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2108	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2412	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2109	w->priority = pri;	2413	ev_set_priority (w, pri);
2110	}	2414	}
2111		2415
2112	void inline_speed	2416	inline_speed void
2113	ev_start (EV_P_ W w, int active)	2417	ev_start (EV_P_ W w, int active)
2114	{	2418	{
2115	pri_adjust (EV_A_ w);	2419	pri_adjust (EV_A_ w);
2116	w->active = active;	2420	w->active = active;
2117	ev_ref (EV_A);	2421	ev_ref (EV_A);
2118	}	2422	}
2119		2423
2120	void inline_size	2424	inline_size void
2121	ev_stop (EV_P_ W w)	2425	ev_stop (EV_P_ W w)
2122	{	2426	{
2123	ev_unref (EV_A);	2427	ev_unref (EV_A);
2124	w->active = 0;	2428	w->active = 0;
2125	}	2429	}
…		…
2132	int fd = w->fd;	2436	int fd = w->fd;
2133		2437
2134	if (expect_false (ev_is_active (w)))	2438	if (expect_false (ev_is_active (w)))
2135	return;	2439	return;
2136		2440
2137	assert (("ev_io_start called with negative fd", fd >= 0));	2441	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2442	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2138		2443
2139	EV_FREQUENT_CHECK;	2444	EV_FREQUENT_CHECK;
2140		2445
2141	ev_start (EV_A_ (W)w, 1);	2446	ev_start (EV_A_ (W)w, 1);
2142	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2447	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2143	wlist_add (&anfds[fd].head, (WL)w);	2448	wlist_add (&anfds[fd].head, (WL)w);
2144		2449
2145	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2450	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2146	w->events &= ~EV_IOFDSET;	2451	w->events &= ~EV__IOFDSET;
2147		2452
2148	EV_FREQUENT_CHECK;	2453	EV_FREQUENT_CHECK;
2149	}	2454	}
2150		2455
2151	void noinline	2456	void noinline
…		…
2153	{	2458	{
2154	clear_pending (EV_A_ (W)w);	2459	clear_pending (EV_A_ (W)w);
2155	if (expect_false (!ev_is_active (w)))	2460	if (expect_false (!ev_is_active (w)))
2156	return;	2461	return;
2157		2462
2158	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));
2159		2464
2160	EV_FREQUENT_CHECK;	2465	EV_FREQUENT_CHECK;
2161		2466
2162	wlist_del (&anfds[w->fd].head, (WL)w);	2467	wlist_del (&anfds[w->fd].head, (WL)w);
2163	ev_stop (EV_A_ (W)w);	2468	ev_stop (EV_A_ (W)w);
…		…
2173	if (expect_false (ev_is_active (w)))	2478	if (expect_false (ev_is_active (w)))
2174	return;	2479	return;
2175		2480
2176	ev_at (w) += mn_now;	2481	ev_at (w) += mn_now;
2177		2482
2178	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.));
2179		2484
2180	EV_FREQUENT_CHECK;	2485	EV_FREQUENT_CHECK;
2181		2486
2182	++timercnt;	2487	++timercnt;
2183	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2488	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2186	ANHE_at_cache (timers [ev_active (w)]);	2491	ANHE_at_cache (timers [ev_active (w)]);
2187	upheap (timers, ev_active (w));	2492	upheap (timers, ev_active (w));
2188		2493
2189	EV_FREQUENT_CHECK;	2494	EV_FREQUENT_CHECK;
2190		2495
2191	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2496	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2192	}	2497	}
2193		2498
2194	void noinline	2499	void noinline
2195	ev_timer_stop (EV_P_ ev_timer *w)	2500	ev_timer_stop (EV_P_ ev_timer *w)
2196	{	2501	{
…		…
2201	EV_FREQUENT_CHECK;	2506	EV_FREQUENT_CHECK;
2202		2507
2203	{	2508	{
2204	int active = ev_active (w);	2509	int active = ev_active (w);
2205		2510
2206	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2511	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2207		2512
2208	--timercnt;	2513	--timercnt;
2209		2514
2210	if (expect_true (active < timercnt + HEAP0))	2515	if (expect_true (active < timercnt + HEAP0))
2211	{	2516	{
…		…
2244	}	2549	}
2245		2550
2246	EV_FREQUENT_CHECK;	2551	EV_FREQUENT_CHECK;
2247	}	2552	}
2248		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
2249	#if EV_PERIODIC_ENABLE	2560	#if EV_PERIODIC_ENABLE
2250	void noinline	2561	void noinline
2251	ev_periodic_start (EV_P_ ev_periodic *w)	2562	ev_periodic_start (EV_P_ ev_periodic *w)
2252	{	2563	{
2253	if (expect_false (ev_is_active (w)))	2564	if (expect_false (ev_is_active (w)))
…		…
2255		2566
2256	if (w->reschedule_cb)	2567	if (w->reschedule_cb)
2257	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2568	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2258	else if (w->interval)	2569	else if (w->interval)
2259	{	2570	{
2260	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.));
2261	/* 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 */
2262	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;
2263	}	2574	}
2264	else	2575	else
2265	ev_at (w) = w->offset;	2576	ev_at (w) = w->offset;
…		…
2273	ANHE_at_cache (periodics [ev_active (w)]);	2584	ANHE_at_cache (periodics [ev_active (w)]);
2274	upheap (periodics, ev_active (w));	2585	upheap (periodics, ev_active (w));
2275		2586
2276	EV_FREQUENT_CHECK;	2587	EV_FREQUENT_CHECK;
2277		2588
2278	/*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));*/
2279	}	2590	}
2280		2591
2281	void noinline	2592	void noinline
2282	ev_periodic_stop (EV_P_ ev_periodic *w)	2593	ev_periodic_stop (EV_P_ ev_periodic *w)
2283	{	2594	{
…		…
2288	EV_FREQUENT_CHECK;	2599	EV_FREQUENT_CHECK;
2289		2600
2290	{	2601	{
2291	int active = ev_active (w);	2602	int active = ev_active (w);
2292		2603
2293	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2604	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2294		2605
2295	--periodiccnt;	2606	--periodiccnt;
2296		2607
2297	if (expect_true (active < periodiccnt + HEAP0))	2608	if (expect_true (active < periodiccnt + HEAP0))
2298	{	2609	{
…		…
2321		2632
2322	void noinline	2633	void noinline
2323	ev_signal_start (EV_P_ ev_signal *w)	2634	ev_signal_start (EV_P_ ev_signal *w)
2324	{	2635	{
2325	#if EV_MULTIPLICITY	2636	#if EV_MULTIPLICITY
2326	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));
2327	#endif	2638	#endif
2328	if (expect_false (ev_is_active (w)))	2639	if (expect_false (ev_is_active (w)))
2329	return;	2640	return;
2330		2641
2331	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));
2332		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
2333	evpipe_init (EV_A);	2676	evpipe_init (EV_A);
2334
2335	EV_FREQUENT_CHECK;
2336		2677
2337	{	2678	{
2338	#ifndef _WIN32	2679	#ifndef _WIN32
2339	sigset_t full, prev;	2680	sigset_t full, prev;
2340	sigfillset (&full);	2681	sigfillset (&full);
2341	sigprocmask (SIG_SETMASK, &full, &prev);	2682	sigprocmask (SIG_SETMASK, &full, &prev);
2342	#endif	2683	#endif
2343		2684
2344	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2685	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2345		2686
2346	#ifndef _WIN32	2687	#ifndef _WIN32
		2688	if (sigfd < 0)/*TODO*/
		2689	sigdelset (&prev, w->signum);
2347	sigprocmask (SIG_SETMASK, &prev, 0);	2690	sigprocmask (SIG_SETMASK, &prev, 0);
2348	#endif	2691	#endif
2349	}	2692	}
2350		2693
2351	ev_start (EV_A_ (W)w, 1);	2694	ev_start (EV_A_ (W)w, 1);
…		…
2354	if (!((WL)w)->next)	2697	if (!((WL)w)->next)
2355	{	2698	{
2356	#if _WIN32	2699	#if _WIN32
2357	signal (w->signum, ev_sighandler);	2700	signal (w->signum, ev_sighandler);
2358	#else	2701	#else
		2702	if (sigfd < 0) /*TODO*/
		2703	{
2359	struct sigaction sa;	2704	struct sigaction sa = { };
2360	sa.sa_handler = ev_sighandler;	2705	sa.sa_handler = ev_sighandler;
2361	sigfillset (&sa.sa_mask);	2706	sigfillset (&sa.sa_mask);
2362	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2707	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2363	sigaction (w->signum, &sa, 0);	2708	sigaction (w->signum, &sa, 0);
		2709	}
2364	#endif	2710	#endif
2365	}	2711	}
2366		2712
2367	EV_FREQUENT_CHECK;	2713	EV_FREQUENT_CHECK;
2368	}	2714	}
…		…
2378		2724
2379	wlist_del (&signals [w->signum - 1].head, (WL)w);	2725	wlist_del (&signals [w->signum - 1].head, (WL)w);
2380	ev_stop (EV_A_ (W)w);	2726	ev_stop (EV_A_ (W)w);
2381		2727
2382	if (!signals [w->signum - 1].head)	2728	if (!signals [w->signum - 1].head)
		2729	#if EV_USE_SIGNALFD
		2730	if (sigfd >= 0)
		2731	{
		2732	sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
		2733	sigdelset (&sigfd_set, w->signum);
		2734	signalfd (sigfd, &sigfd_set, 0);
		2735	sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
		2736	/*TODO: maybe unblock signal? */
		2737	}
		2738	else
		2739	#endif
2383	signal (w->signum, SIG_DFL);	2740	signal (w->signum, SIG_DFL);
2384		2741
2385	EV_FREQUENT_CHECK;	2742	EV_FREQUENT_CHECK;
2386	}	2743	}
2387		2744
2388	void	2745	void
2389	ev_child_start (EV_P_ ev_child *w)	2746	ev_child_start (EV_P_ ev_child *w)
2390	{	2747	{
2391	#if EV_MULTIPLICITY	2748	#if EV_MULTIPLICITY
2392	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2749	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2393	#endif	2750	#endif
2394	if (expect_false (ev_is_active (w)))	2751	if (expect_false (ev_is_active (w)))
2395	return;	2752	return;
2396		2753
2397	EV_FREQUENT_CHECK;	2754	EV_FREQUENT_CHECK;
…		…
2422	# ifdef _WIN32	2779	# ifdef _WIN32
2423	# undef lstat	2780	# undef lstat
2424	# define lstat(a,b) _stati64 (a,b)	2781	# define lstat(a,b) _stati64 (a,b)
2425	# endif	2782	# endif
2426		2783
2427	#define DEF_STAT_INTERVAL 5.0074891	2784	#define DEF_STAT_INTERVAL 5.0074891
		2785	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2428	#define MIN_STAT_INTERVAL 0.1074891	2786	#define MIN_STAT_INTERVAL 0.1074891
2429		2787
2430	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2788	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2431		2789
2432	#if EV_USE_INOTIFY	2790	#if EV_USE_INOTIFY
2433	# define EV_INOTIFY_BUFSIZE 8192	2791	# define EV_INOTIFY_BUFSIZE 8192
…		…
2437	{	2795	{
2438	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);	2796	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);
2439		2797
2440	if (w->wd < 0)	2798	if (w->wd < 0)
2441	{	2799	{
		2800	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2442	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2801	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2443		2802
2444	/* monitor some parent directory for speedup hints */	2803	/* monitor some parent directory for speedup hints */
2445	/* note that exceeding the hardcoded limit is not a correctness issue, */	2804	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2446	/* but an efficiency issue only */	2805	/* but an efficiency issue only */
2447	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2806	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2448	{	2807	{
2449	char path [4096];	2808	char path [4096];
2450	strcpy (path, w->path);	2809	strcpy (path, w->path);
…		…
2454	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2813	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2455	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2814	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2456		2815
2457	char *pend = strrchr (path, '/');	2816	char *pend = strrchr (path, '/');
2458		2817
2459	if (!pend)	2818	if (!pend || pend == path)
2460	break; /* whoops, no '/', complain to your admin */	2819	break;
2461		2820
2462	*pend = 0;	2821	*pend = 0;
2463	w->wd = inotify_add_watch (fs_fd, path, mask);	2822	w->wd = inotify_add_watch (fs_fd, path, mask);
2464	}	2823	}
2465	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2824	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2466	}	2825	}
2467	}	2826	}
2468	else
2469	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2470		2827
2471	if (w->wd >= 0)	2828	if (w->wd >= 0)
		2829	{
2472	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2830	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2831
		2832	/* now local changes will be tracked by inotify, but remote changes won't */
		2833	/* unless the filesystem it known to be local, we therefore still poll */
		2834	/* also do poll on <2.6.25, but with normal frequency */
		2835	struct statfs sfs;
		2836
		2837	if (fs_2625 && !statfs (w->path, &sfs))
		2838	if (sfs.f_type == 0x1373 /* devfs */
		2839	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2840	|| sfs.f_type == 0x3153464a /* jfs */
		2841	|| sfs.f_type == 0x52654973 /* reiser3 */
		2842	|| sfs.f_type == 0x01021994 /* tempfs */
		2843	|| sfs.f_type == 0x58465342 /* xfs */)
		2844	return;
		2845
		2846	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2847	ev_timer_again (EV_A_ &w->timer);
		2848	}
2473	}	2849	}
2474		2850
2475	static void noinline	2851	static void noinline
2476	infy_del (EV_P_ ev_stat *w)	2852	infy_del (EV_P_ ev_stat *w)
2477	{	2853	{
…		…
2491		2867
2492	static void noinline	2868	static void noinline
2493	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)	2869	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2494	{	2870	{
2495	if (slot < 0)	2871	if (slot < 0)
2496	/* overflow, need to check for all hahs slots */	2872	/* overflow, need to check for all hash slots */
2497	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	2873	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2498	infy_wd (EV_A_ slot, wd, ev);	2874	infy_wd (EV_A_ slot, wd, ev);
2499	else	2875	else
2500	{	2876	{
2501	WL w_;	2877	WL w_;
…		…
2507		2883
2508	if (w->wd == wd || wd == -1)	2884	if (w->wd == wd || wd == -1)
2509	{	2885	{
2510	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2886	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2511	{	2887	{
		2888	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2512	w->wd = -1;	2889	w->wd = -1;
2513	infy_add (EV_A_ w); /* re-add, no matter what */	2890	infy_add (EV_A_ w); /* re-add, no matter what */
2514	}	2891	}
2515		2892
2516	stat_timer_cb (EV_A_ &w->timer, 0);	2893	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2529		2906
2530	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2907	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2531	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2908	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2532	}	2909	}
2533		2910
2534	void inline_size	2911	inline_size void
		2912	check_2625 (EV_P)
		2913	{
		2914	/* kernels < 2.6.25 are borked
		2915	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		2916	*/
		2917	struct utsname buf;
		2918	int major, minor, micro;
		2919
		2920	if (uname (&buf))
		2921	return;
		2922
		2923	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
		2924	return;
		2925
		2926	if (major < 2
		2927	|| (major == 2 && minor < 6)
		2928	|| (major == 2 && minor == 6 && micro < 25))
		2929	return;
		2930
		2931	fs_2625 = 1;
		2932	}
		2933
		2934	inline_size void
2535	infy_init (EV_P)	2935	infy_init (EV_P)
2536	{	2936	{
2537	if (fs_fd != -2)	2937	if (fs_fd != -2)
2538	return;	2938	return;
		2939
		2940	fs_fd = -1;
		2941
		2942	check_2625 (EV_A);
2539		2943
2540	fs_fd = inotify_init ();	2944	fs_fd = inotify_init ();
2541		2945
2542	if (fs_fd >= 0)	2946	if (fs_fd >= 0)
2543	{	2947	{
…		…
2545	ev_set_priority (&fs_w, EV_MAXPRI);	2949	ev_set_priority (&fs_w, EV_MAXPRI);
2546	ev_io_start (EV_A_ &fs_w);	2950	ev_io_start (EV_A_ &fs_w);
2547	}	2951	}
2548	}	2952	}
2549		2953
2550	void inline_size	2954	inline_size void
2551	infy_fork (EV_P)	2955	infy_fork (EV_P)
2552	{	2956	{
2553	int slot;	2957	int slot;
2554		2958
2555	if (fs_fd < 0)	2959	if (fs_fd < 0)
…		…
2571	w->wd = -1;	2975	w->wd = -1;
2572		2976
2573	if (fs_fd >= 0)	2977	if (fs_fd >= 0)
2574	infy_add (EV_A_ w); /* re-add, no matter what */	2978	infy_add (EV_A_ w); /* re-add, no matter what */
2575	else	2979	else
2576	ev_timer_start (EV_A_ &w->timer);	2980	ev_timer_again (EV_A_ &w->timer);
2577	}	2981	}
2578
2579	}	2982	}
2580	}	2983	}
2581		2984
2582	#endif	2985	#endif
2583		2986
…		…
2619	|| w->prev.st_atime != w->attr.st_atime	3022	|| w->prev.st_atime != w->attr.st_atime
2620	|| w->prev.st_mtime != w->attr.st_mtime	3023	|| w->prev.st_mtime != w->attr.st_mtime
2621	|| w->prev.st_ctime != w->attr.st_ctime	3024	|| w->prev.st_ctime != w->attr.st_ctime
2622	) {	3025	) {
2623	#if EV_USE_INOTIFY	3026	#if EV_USE_INOTIFY
		3027	if (fs_fd >= 0)
		3028	{
2624	infy_del (EV_A_ w);	3029	infy_del (EV_A_ w);
2625	infy_add (EV_A_ w);	3030	infy_add (EV_A_ w);
2626	ev_stat_stat (EV_A_ w); /* avoid race... */	3031	ev_stat_stat (EV_A_ w); /* avoid race... */
		3032	}
2627	#endif	3033	#endif
2628		3034
2629	ev_feed_event (EV_A_ w, EV_STAT);	3035	ev_feed_event (EV_A_ w, EV_STAT);
2630	}	3036	}
2631	}	3037	}
…		…
2634	ev_stat_start (EV_P_ ev_stat *w)	3040	ev_stat_start (EV_P_ ev_stat *w)
2635	{	3041	{
2636	if (expect_false (ev_is_active (w)))	3042	if (expect_false (ev_is_active (w)))
2637	return;	3043	return;
2638		3044
2639	/* since we use memcmp, we need to clear any padding data etc. */
2640	memset (&w->prev, 0, sizeof (ev_statdata));
2641	memset (&w->attr, 0, sizeof (ev_statdata));
2642
2643	ev_stat_stat (EV_A_ w);	3045	ev_stat_stat (EV_A_ w);
2644		3046
		3047	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2645	if (w->interval < MIN_STAT_INTERVAL)	3048	w->interval = MIN_STAT_INTERVAL;
2646	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2647		3049
2648	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	3050	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2649	ev_set_priority (&w->timer, ev_priority (w));	3051	ev_set_priority (&w->timer, ev_priority (w));
2650		3052
2651	#if EV_USE_INOTIFY	3053	#if EV_USE_INOTIFY
2652	infy_init (EV_A);	3054	infy_init (EV_A);
2653		3055
2654	if (fs_fd >= 0)	3056	if (fs_fd >= 0)
2655	infy_add (EV_A_ w);	3057	infy_add (EV_A_ w);
2656	else	3058	else
2657	#endif	3059	#endif
2658	ev_timer_start (EV_A_ &w->timer);	3060	ev_timer_again (EV_A_ &w->timer);
2659		3061
2660	ev_start (EV_A_ (W)w, 1);	3062	ev_start (EV_A_ (W)w, 1);
2661		3063
2662	EV_FREQUENT_CHECK;	3064	EV_FREQUENT_CHECK;
2663	}	3065	}
…		…
2838	static void	3240	static void
2839	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)	3241	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2840	{	3242	{
2841	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3243	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2842		3244
		3245	ev_embed_stop (EV_A_ w);
		3246
2843	{	3247	{
2844	struct ev_loop *loop = w->other;	3248	struct ev_loop *loop = w->other;
2845		3249
2846	ev_loop_fork (EV_A);	3250	ev_loop_fork (EV_A);
		3251	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2847	}	3252	}
		3253
		3254	ev_embed_start (EV_A_ w);
2848	}	3255	}
2849		3256
2850	#if 0	3257	#if 0
2851	static void	3258	static void
2852	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3259	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
…		…
2861	if (expect_false (ev_is_active (w)))	3268	if (expect_false (ev_is_active (w)))
2862	return;	3269	return;
2863		3270
2864	{	3271	{
2865	struct ev_loop *loop = w->other;	3272	struct ev_loop *loop = w->other;
2866	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3273	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2867	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3274	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2868	}	3275	}
2869		3276
2870	EV_FREQUENT_CHECK;	3277	EV_FREQUENT_CHECK;
2871		3278
…		…
3054	ev_timer_set (&once->to, timeout, 0.);	3461	ev_timer_set (&once->to, timeout, 0.);
3055	ev_timer_start (EV_A_ &once->to);	3462	ev_timer_start (EV_A_ &once->to);
3056	}	3463	}
3057	}	3464	}
3058		3465
		3466	/*****************************************************************************/
		3467
		3468	#if EV_WALK_ENABLE
		3469	void
		3470	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3471	{
		3472	int i, j;
		3473	ev_watcher_list *wl, *wn;
		3474
		3475	if (types & (EV_IO | EV_EMBED))
		3476	for (i = 0; i < anfdmax; ++i)
		3477	for (wl = anfds [i].head; wl; )
		3478	{
		3479	wn = wl->next;
		3480
		3481	#if EV_EMBED_ENABLE
		3482	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3483	{
		3484	if (types & EV_EMBED)
		3485	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3486	}
		3487	else
		3488	#endif
		3489	#if EV_USE_INOTIFY
		3490	if (ev_cb ((ev_io *)wl) == infy_cb)
		3491	;
		3492	else
		3493	#endif
		3494	if ((ev_io *)wl != &pipe_w)
		3495	if (types & EV_IO)
		3496	cb (EV_A_ EV_IO, wl);
		3497
		3498	wl = wn;
		3499	}
		3500
		3501	if (types & (EV_TIMER | EV_STAT))
		3502	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3503	#if EV_STAT_ENABLE
		3504	/*TODO: timer is not always active*/
		3505	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3506	{
		3507	if (types & EV_STAT)
		3508	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3509	}
		3510	else
		3511	#endif
		3512	if (types & EV_TIMER)
		3513	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3514
		3515	#if EV_PERIODIC_ENABLE
		3516	if (types & EV_PERIODIC)
		3517	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3518	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3519	#endif
		3520
		3521	#if EV_IDLE_ENABLE
		3522	if (types & EV_IDLE)
		3523	for (j = NUMPRI; i--; )
		3524	for (i = idlecnt [j]; i--; )
		3525	cb (EV_A_ EV_IDLE, idles [j][i]);
		3526	#endif
		3527
		3528	#if EV_FORK_ENABLE
		3529	if (types & EV_FORK)
		3530	for (i = forkcnt; i--; )
		3531	if (ev_cb (forks [i]) != embed_fork_cb)
		3532	cb (EV_A_ EV_FORK, forks [i]);
		3533	#endif
		3534
		3535	#if EV_ASYNC_ENABLE
		3536	if (types & EV_ASYNC)
		3537	for (i = asynccnt; i--; )
		3538	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3539	#endif
		3540
		3541	if (types & EV_PREPARE)
		3542	for (i = preparecnt; i--; )
		3543	#if EV_EMBED_ENABLE
		3544	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3545	#endif
		3546	cb (EV_A_ EV_PREPARE, prepares [i]);
		3547
		3548	if (types & EV_CHECK)
		3549	for (i = checkcnt; i--; )
		3550	cb (EV_A_ EV_CHECK, checks [i]);
		3551
		3552	if (types & EV_SIGNAL)
		3553	for (i = 0; i < signalmax; ++i)
		3554	for (wl = signals [i].head; wl; )
		3555	{
		3556	wn = wl->next;
		3557	cb (EV_A_ EV_SIGNAL, wl);
		3558	wl = wn;
		3559	}
		3560
		3561	if (types & EV_CHILD)
		3562	for (i = EV_PID_HASHSIZE; i--; )
		3563	for (wl = childs [i]; wl; )
		3564	{
		3565	wn = wl->next;
		3566	cb (EV_A_ EV_CHILD, wl);
		3567	wl = wn;
		3568	}
		3569	/* EV_STAT 0x00001000 /* stat data changed */
		3570	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3571	}
		3572	#endif
		3573
3059	#if EV_MULTIPLICITY	3574	#if EV_MULTIPLICITY
3060	#include "ev_wrap.h"	3575	#include "ev_wrap.h"
3061	#endif	3576	#endif
3062		3577
3063	#ifdef __cplusplus	3578	#ifdef __cplusplus

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