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Comparing libev/ev.c (file contents):
Revision 1.248 by root, Wed May 21 23:25:21 2008 UTC vs.
Revision 1.301 by root, Wed Jul 15 16:58:53 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
…		…
126	# define EV_USE_EVENTFD 1	140	# define EV_USE_EVENTFD 1
127	# else	141	# else
128	# define EV_USE_EVENTFD 0	142	# define EV_USE_EVENTFD 0
129	# endif	143	# endif
130	# endif	144	# endif
131		145
132	#endif	146	#endif
133		147
134	#include <math.h>	148	#include <math.h>
135	#include <stdlib.h>	149	#include <stdlib.h>
136	#include <fcntl.h>	150	#include <fcntl.h>
…		…
154	#ifndef _WIN32	168	#ifndef _WIN32
155	# include <sys/time.h>	169	# include <sys/time.h>
156	# include <sys/wait.h>	170	# include <sys/wait.h>
157	# include <unistd.h>	171	# include <unistd.h>
158	#else	172	#else
		173	# include <io.h>
159	# define WIN32_LEAN_AND_MEAN	174	# define WIN32_LEAN_AND_MEAN
160	# include <windows.h>	175	# include <windows.h>
161	# ifndef EV_SELECT_IS_WINSOCKET	176	# ifndef EV_SELECT_IS_WINSOCKET
162	# define EV_SELECT_IS_WINSOCKET 1	177	# define EV_SELECT_IS_WINSOCKET 1
163	# endif	178	# endif
164	#endif	179	#endif
165		180
166	/* this block tries to deduce configuration from header-defined symbols and defaults */	181	/* this block tries to deduce configuration from header-defined symbols and defaults */
167		182
		183	#ifndef EV_USE_CLOCK_SYSCALL
		184	# if __linux && __GLIBC__ >= 2
		185	# define EV_USE_CLOCK_SYSCALL 1
		186	# else
		187	# define EV_USE_CLOCK_SYSCALL 0
		188	# endif
		189	#endif
		190
168	#ifndef EV_USE_MONOTONIC	191	#ifndef EV_USE_MONOTONIC
		192	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
		193	# define EV_USE_MONOTONIC 1
		194	# else
169	# define EV_USE_MONOTONIC 0	195	# define EV_USE_MONOTONIC 0
		196	# endif
170	#endif	197	#endif
171		198
172	#ifndef EV_USE_REALTIME	199	#ifndef EV_USE_REALTIME
173	# define EV_USE_REALTIME 0	200	# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174	#endif	201	#endif
175		202
176	#ifndef EV_USE_NANOSLEEP	203	#ifndef EV_USE_NANOSLEEP
		204	# if _POSIX_C_SOURCE >= 199309L
		205	# define EV_USE_NANOSLEEP 1
		206	# else
177	# define EV_USE_NANOSLEEP 0	207	# define EV_USE_NANOSLEEP 0
		208	# endif
178	#endif	209	#endif
179		210
180	#ifndef EV_USE_SELECT	211	#ifndef EV_USE_SELECT
181	# define EV_USE_SELECT 1	212	# define EV_USE_SELECT 1
182	#endif	213	#endif
…		…
235	# else	266	# else
236	# define EV_USE_EVENTFD 0	267	# define EV_USE_EVENTFD 0
237	# endif	268	# endif
238	#endif	269	#endif
239		270
		271	#if 0 /* debugging */
		272	# define EV_VERIFY 3
		273	# define EV_USE_4HEAP 1
		274	# define EV_HEAP_CACHE_AT 1
		275	#endif
		276
		277	#ifndef EV_VERIFY
		278	# define EV_VERIFY !EV_MINIMAL
		279	#endif
		280
240	#ifndef EV_USE_4HEAP	281	#ifndef EV_USE_4HEAP
241	# define EV_USE_4HEAP !EV_MINIMAL	282	# define EV_USE_4HEAP !EV_MINIMAL
242	#endif	283	#endif
243		284
244	#ifndef EV_HEAP_CACHE_AT	285	#ifndef EV_HEAP_CACHE_AT
245	# define EV_HEAP_CACHE_AT !EV_MINIMAL	286	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		287	#endif
		288
		289	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		290	/* which makes programs even slower. might work on other unices, too. */
		291	#if EV_USE_CLOCK_SYSCALL
		292	# include <syscall.h>
		293	# ifdef SYS_clock_gettime
		294	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		295	# undef EV_USE_MONOTONIC
		296	# define EV_USE_MONOTONIC 1
		297	# else
		298	# undef EV_USE_CLOCK_SYSCALL
		299	# define EV_USE_CLOCK_SYSCALL 0
		300	# endif
246	#endif	301	#endif
247		302
248	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	303	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
249		304
250	#ifndef CLOCK_MONOTONIC	305	#ifndef CLOCK_MONOTONIC
…		…
267	# include <sys/select.h>	322	# include <sys/select.h>
268	# endif	323	# endif
269	#endif	324	#endif
270		325
271	#if EV_USE_INOTIFY	326	#if EV_USE_INOTIFY
		327	# include <sys/utsname.h>
		328	# include <sys/statfs.h>
272	# include <sys/inotify.h>	329	# include <sys/inotify.h>
		330	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		331	# ifndef IN_DONT_FOLLOW
		332	# undef EV_USE_INOTIFY
		333	# define EV_USE_INOTIFY 0
		334	# endif
273	#endif	335	#endif
274		336
275	#if EV_SELECT_IS_WINSOCKET	337	#if EV_SELECT_IS_WINSOCKET
276	# include <winsock.h>	338	# include <winsock.h>
277	#endif	339	#endif
…		…
288	# endif	350	# endif
289	#endif	351	#endif
290		352
291	/**/	353	/**/
292		354
293	/* undefined or zero: no verification done or available */
294	/* 1 or higher: ev_loop_verify function available */
295	/* 2 or higher: ev_loop_verify is called frequently */
296	#define EV_VERIFY 1
297
298	#if EV_VERIFY > 1	355	#if EV_VERIFY >= 3
299	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	356	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
300	#else	357	#else
301	# define EV_FREQUENT_CHECK do { } while (0)	358	# define EV_FREQUENT_CHECK do { } while (0)
302	#endif	359	#endif
303		360
…		…
334	# define inline_speed static noinline	391	# define inline_speed static noinline
335	#else	392	#else
336	# define inline_speed static inline	393	# define inline_speed static inline
337	#endif	394	#endif
338		395
339	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	396	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		397
		398	#if EV_MINPRI == EV_MAXPRI
		399	# define ABSPRI(w) (((W)w), 0)
		400	#else
340	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	401	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		402	#endif
341		403
342	#define EMPTY /* required for microsofts broken pseudo-c compiler */	404	#define EMPTY /* required for microsofts broken pseudo-c compiler */
343	#define EMPTY2(a,b) /* used to suppress some warnings */	405	#define EMPTY2(a,b) /* used to suppress some warnings */
344		406
345	typedef ev_watcher *W;	407	typedef ev_watcher *W;
…		…
347	typedef ev_watcher_time *WT;	409	typedef ev_watcher_time *WT;
348		410
349	#define ev_active(w) ((W)(w))->active	411	#define ev_active(w) ((W)(w))->active
350	#define ev_at(w) ((WT)(w))->at	412	#define ev_at(w) ((WT)(w))->at
351		413
352	#if EV_USE_MONOTONIC	414	#if EV_USE_REALTIME
353	/* sig_atomic_t is used to avoid per-thread variables or locking but still */	415	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
354	/* giving it a reasonably high chance of working on typical architetcures */	416	/* giving it a reasonably high chance of working on typical architetcures */
		417	static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
		418	#endif
		419
		420	#if EV_USE_MONOTONIC
355	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	421	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
356	#endif	422	#endif
357		423
358	#ifdef _WIN32	424	#ifdef _WIN32
359	# include "ev_win32.c"	425	# include "ev_win32.c"
…		…
368	{	434	{
369	syserr_cb = cb;	435	syserr_cb = cb;
370	}	436	}
371		437
372	static void noinline	438	static void noinline
373	syserr (const char *msg)	439	ev_syserr (const char *msg)
374	{	440	{
375	if (!msg)	441	if (!msg)
376	msg = "(libev) system error";	442	msg = "(libev) system error";
377		443
378	if (syserr_cb)	444	if (syserr_cb)
…		…
424	#define ev_malloc(size) ev_realloc (0, (size))	490	#define ev_malloc(size) ev_realloc (0, (size))
425	#define ev_free(ptr) ev_realloc ((ptr), 0)	491	#define ev_free(ptr) ev_realloc ((ptr), 0)
426		492
427	/*****************************************************************************/	493	/*****************************************************************************/
428		494
		495	/* set in reify when reification needed */
		496	#define EV_ANFD_REIFY 1
		497
		498	/* file descriptor info structure */
429	typedef struct	499	typedef struct
430	{	500	{
431	WL head;	501	WL head;
432	unsigned char events;	502	unsigned char events; /* the events watched for */
		503	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
		504	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
433	unsigned char reify;	505	unsigned char unused;
		506	#if EV_USE_EPOLL
		507	unsigned int egen; /* generation counter to counter epoll bugs */
		508	#endif
434	#if EV_SELECT_IS_WINSOCKET	509	#if EV_SELECT_IS_WINSOCKET
435	SOCKET handle;	510	SOCKET handle;
436	#endif	511	#endif
437	} ANFD;	512	} ANFD;
438		513
		514	/* stores the pending event set for a given watcher */
439	typedef struct	515	typedef struct
440	{	516	{
441	W w;	517	W w;
442	int events;	518	int events; /* the pending event set for the given watcher */
443	} ANPENDING;	519	} ANPENDING;
444		520
445	#if EV_USE_INOTIFY	521	#if EV_USE_INOTIFY
446	/* hash table entry per inotify-id */	522	/* hash table entry per inotify-id */
447	typedef struct	523	typedef struct
…		…
450	} ANFS;	526	} ANFS;
451	#endif	527	#endif
452		528
453	/* Heap Entry */	529	/* Heap Entry */
454	#if EV_HEAP_CACHE_AT	530	#if EV_HEAP_CACHE_AT
		531	/* a heap element */
455	typedef struct {	532	typedef struct {
456	ev_tstamp at;	533	ev_tstamp at;
457	WT w;	534	WT w;
458	} ANHE;	535	} ANHE;
459		536
460	#define ANHE_w(he) (he).w /* access watcher, read-write */	537	#define ANHE_w(he) (he).w /* access watcher, read-write */
461	#define ANHE_at(he) (he).at /* access cached at, read-only */	538	#define ANHE_at(he) (he).at /* access cached at, read-only */
462	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */	539	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
463	#else	540	#else
		541	/* a heap element */
464	typedef WT ANHE;	542	typedef WT ANHE;
465		543
466	#define ANHE_w(he) (he)	544	#define ANHE_w(he) (he)
467	#define ANHE_at(he) (he)->at	545	#define ANHE_at(he) (he)->at
468	#define ANHE_at_cache(he)	546	#define ANHE_at_cache(he)
…		…
492		570
493	static int ev_default_loop_ptr;	571	static int ev_default_loop_ptr;
494		572
495	#endif	573	#endif
496		574
		575	#if EV_MINIMAL < 2
		576	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		577	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		578	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		579	#else
		580	# define EV_RELEASE_CB (void)0
		581	# define EV_ACQUIRE_CB (void)0
		582	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		583	#endif
		584
		585	#define EVUNLOOP_RECURSE 0x80
		586
497	/*****************************************************************************/	587	/*****************************************************************************/
498		588
		589	#ifndef EV_HAVE_EV_TIME
499	ev_tstamp	590	ev_tstamp
500	ev_time (void)	591	ev_time (void)
501	{	592	{
502	#if EV_USE_REALTIME	593	#if EV_USE_REALTIME
		594	if (expect_true (have_realtime))
		595	{
503	struct timespec ts;	596	struct timespec ts;
504	clock_gettime (CLOCK_REALTIME, &ts);	597	clock_gettime (CLOCK_REALTIME, &ts);
505	return ts.tv_sec + ts.tv_nsec * 1e-9;	598	return ts.tv_sec + ts.tv_nsec * 1e-9;
506	#else	599	}
		600	#endif
		601
507	struct timeval tv;	602	struct timeval tv;
508	gettimeofday (&tv, 0);	603	gettimeofday (&tv, 0);
509	return tv.tv_sec + tv.tv_usec * 1e-6;	604	return tv.tv_sec + tv.tv_usec * 1e-6;
510	#endif
511	}	605	}
		606	#endif
512		607
513	ev_tstamp inline_size	608	inline_size ev_tstamp
514	get_clock (void)	609	get_clock (void)
515	{	610	{
516	#if EV_USE_MONOTONIC	611	#if EV_USE_MONOTONIC
517	if (expect_true (have_monotonic))	612	if (expect_true (have_monotonic))
518	{	613	{
…		…
551	struct timeval tv;	646	struct timeval tv;
552		647
553	tv.tv_sec = (time_t)delay;	648	tv.tv_sec = (time_t)delay;
554	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	649	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
555		650
		651	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
		652	/* somehting not guaranteed by newer posix versions, but guaranteed */
		653	/* by older ones */
556	select (0, 0, 0, 0, &tv);	654	select (0, 0, 0, 0, &tv);
557	#endif	655	#endif
558	}	656	}
559	}	657	}
560		658
561	/*****************************************************************************/	659	/*****************************************************************************/
562		660
563	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	661	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
564		662
565	int inline_size	663	/* find a suitable new size for the given array, */
		664	/* hopefully by rounding to a ncie-to-malloc size */
		665	inline_size int
566	array_nextsize (int elem, int cur, int cnt)	666	array_nextsize (int elem, int cur, int cnt)
567	{	667	{
568	int ncur = cur + 1;	668	int ncur = cur + 1;
569		669
570	do	670	do
…		…
587	array_realloc (int elem, void *base, int *cur, int cnt)	687	array_realloc (int elem, void *base, int *cur, int cnt)
588	{	688	{
589	*cur = array_nextsize (elem, *cur, cnt);	689	*cur = array_nextsize (elem, *cur, cnt);
590	return ev_realloc (base, elem * *cur);	690	return ev_realloc (base, elem * *cur);
591	}	691	}
		692
		693	#define array_init_zero(base,count) \
		694	memset ((void *)(base), 0, sizeof (*(base)) * (count))
592		695
593	#define array_needsize(type,base,cur,cnt,init) \	696	#define array_needsize(type,base,cur,cnt,init) \
594	if (expect_false ((cnt) > (cur))) \	697	if (expect_false ((cnt) > (cur))) \
595	{ \	698	{ \
596	int ocur_ = (cur); \	699	int ocur_ = (cur); \
…		…
608	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	711	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
609	}	712	}
610	#endif	713	#endif
611		714
612	#define array_free(stem, idx) \	715	#define array_free(stem, idx) \
613	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	716	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
614		717
615	/*****************************************************************************/	718	/*****************************************************************************/
		719
		720	/* dummy callback for pending events */
		721	static void noinline
		722	pendingcb (EV_P_ ev_prepare *w, int revents)
		723	{
		724	}
616		725
617	void noinline	726	void noinline
618	ev_feed_event (EV_P_ void *w, int revents)	727	ev_feed_event (EV_P_ void *w, int revents)
619	{	728	{
620	W w_ = (W)w;	729	W w_ = (W)w;
…		…
629	pendings [pri][w_->pending - 1].w = w_;	738	pendings [pri][w_->pending - 1].w = w_;
630	pendings [pri][w_->pending - 1].events = revents;	739	pendings [pri][w_->pending - 1].events = revents;
631	}	740	}
632	}	741	}
633		742
634	void inline_speed	743	inline_speed void
		744	feed_reverse (EV_P_ W w)
		745	{
		746	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		747	rfeeds [rfeedcnt++] = w;
		748	}
		749
		750	inline_size void
		751	feed_reverse_done (EV_P_ int revents)
		752	{
		753	do
		754	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		755	while (rfeedcnt);
		756	}
		757
		758	inline_speed void
635	queue_events (EV_P_ W *events, int eventcnt, int type)	759	queue_events (EV_P_ W *events, int eventcnt, int type)
636	{	760	{
637	int i;	761	int i;
638		762
639	for (i = 0; i < eventcnt; ++i)	763	for (i = 0; i < eventcnt; ++i)
640	ev_feed_event (EV_A_ events [i], type);	764	ev_feed_event (EV_A_ events [i], type);
641	}	765	}
642		766
643	/*****************************************************************************/	767	/*****************************************************************************/
644		768
645	void inline_size	769	inline_speed void
646	anfds_init (ANFD *base, int count)
647	{
648	while (count--)
649	{
650	base->head = 0;
651	base->events = EV_NONE;
652	base->reify = 0;
653
654	++base;
655	}
656	}
657
658	void inline_speed
659	fd_event (EV_P_ int fd, int revents)	770	fd_event_nc (EV_P_ int fd, int revents)
660	{	771	{
661	ANFD *anfd = anfds + fd;	772	ANFD *anfd = anfds + fd;
662	ev_io *w;	773	ev_io *w;
663		774
664	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	775	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
668	if (ev)	779	if (ev)
669	ev_feed_event (EV_A_ (W)w, ev);	780	ev_feed_event (EV_A_ (W)w, ev);
670	}	781	}
671	}	782	}
672		783
		784	/* do not submit kernel events for fds that have reify set */
		785	/* because that means they changed while we were polling for new events */
		786	inline_speed void
		787	fd_event (EV_P_ int fd, int revents)
		788	{
		789	ANFD *anfd = anfds + fd;
		790
		791	if (expect_true (!anfd->reify))
		792	fd_event_nc (EV_A_ fd, revents);
		793	}
		794
673	void	795	void
674	ev_feed_fd_event (EV_P_ int fd, int revents)	796	ev_feed_fd_event (EV_P_ int fd, int revents)
675	{	797	{
676	if (fd >= 0 && fd < anfdmax)	798	if (fd >= 0 && fd < anfdmax)
677	fd_event (EV_A_ fd, revents);	799	fd_event_nc (EV_A_ fd, revents);
678	}	800	}
679		801
680	void inline_size	802	/* make sure the external fd watch events are in-sync */
		803	/* with the kernel/libev internal state */
		804	inline_size void
681	fd_reify (EV_P)	805	fd_reify (EV_P)
682	{	806	{
683	int i;	807	int i;
684		808
685	for (i = 0; i < fdchangecnt; ++i)	809	for (i = 0; i < fdchangecnt; ++i)
…		…
694	events |= (unsigned char)w->events;	818	events |= (unsigned char)w->events;
695		819
696	#if EV_SELECT_IS_WINSOCKET	820	#if EV_SELECT_IS_WINSOCKET
697	if (events)	821	if (events)
698	{	822	{
699	unsigned long argp;	823	unsigned long arg;
700	#ifdef EV_FD_TO_WIN32_HANDLE	824	#ifdef EV_FD_TO_WIN32_HANDLE
701	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	825	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
702	#else	826	#else
703	anfd->handle = _get_osfhandle (fd);	827	anfd->handle = _get_osfhandle (fd);
704	#endif	828	#endif
705	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	829	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
706	}	830	}
707	#endif	831	#endif
708		832
709	{	833	{
710	unsigned char o_events = anfd->events;	834	unsigned char o_events = anfd->events;
711	unsigned char o_reify = anfd->reify;	835	unsigned char o_reify = anfd->reify;
712		836
713	anfd->reify = 0;	837	anfd->reify = 0;
714	anfd->events = events;	838	anfd->events = events;
715		839
716	if (o_events != events || o_reify & EV_IOFDSET)	840	if (o_events != events || o_reify & EV__IOFDSET)
717	backend_modify (EV_A_ fd, o_events, events);	841	backend_modify (EV_A_ fd, o_events, events);
718	}	842	}
719	}	843	}
720		844
721	fdchangecnt = 0;	845	fdchangecnt = 0;
722	}	846	}
723		847
724	void inline_size	848	/* something about the given fd changed */
		849	inline_size void
725	fd_change (EV_P_ int fd, int flags)	850	fd_change (EV_P_ int fd, int flags)
726	{	851	{
727	unsigned char reify = anfds [fd].reify;	852	unsigned char reify = anfds [fd].reify;
728	anfds [fd].reify |= flags;	853	anfds [fd].reify |= flags;
729		854
…		…
733	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	858	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
734	fdchanges [fdchangecnt - 1] = fd;	859	fdchanges [fdchangecnt - 1] = fd;
735	}	860	}
736	}	861	}
737		862
738	void inline_speed	863	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		864	inline_speed void
739	fd_kill (EV_P_ int fd)	865	fd_kill (EV_P_ int fd)
740	{	866	{
741	ev_io *w;	867	ev_io *w;
742		868
743	while ((w = (ev_io *)anfds [fd].head))	869	while ((w = (ev_io *)anfds [fd].head))
…		…
745	ev_io_stop (EV_A_ w);	871	ev_io_stop (EV_A_ w);
746	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	872	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
747	}	873	}
748	}	874	}
749		875
750	int inline_size	876	/* check whether the given fd is atcually valid, for error recovery */
		877	inline_size int
751	fd_valid (int fd)	878	fd_valid (int fd)
752	{	879	{
753	#ifdef _WIN32	880	#ifdef _WIN32
754	return _get_osfhandle (fd) != -1;	881	return _get_osfhandle (fd) != -1;
755	#else	882	#else
…		…
763	{	890	{
764	int fd;	891	int fd;
765		892
766	for (fd = 0; fd < anfdmax; ++fd)	893	for (fd = 0; fd < anfdmax; ++fd)
767	if (anfds [fd].events)	894	if (anfds [fd].events)
768	if (!fd_valid (fd) == -1 && errno == EBADF)	895	if (!fd_valid (fd) && errno == EBADF)
769	fd_kill (EV_A_ fd);	896	fd_kill (EV_A_ fd);
770	}	897	}
771		898
772	/* called on ENOMEM in select/poll to kill some fds and retry */	899	/* called on ENOMEM in select/poll to kill some fds and retry */
773	static void noinline	900	static void noinline
…		…
791		918
792	for (fd = 0; fd < anfdmax; ++fd)	919	for (fd = 0; fd < anfdmax; ++fd)
793	if (anfds [fd].events)	920	if (anfds [fd].events)
794	{	921	{
795	anfds [fd].events = 0;	922	anfds [fd].events = 0;
		923	anfds [fd].emask = 0;
796	fd_change (EV_A_ fd, EV_IOFDSET | 1);	924	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
797	}	925	}
798	}	926	}
799		927
800	/*****************************************************************************/	928	/*****************************************************************************/
801		929
…		…
817	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	945	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
818	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	946	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
819	#define UPHEAP_DONE(p,k) ((p) == (k))	947	#define UPHEAP_DONE(p,k) ((p) == (k))
820		948
821	/* away from the root */	949	/* away from the root */
822	void inline_speed	950	inline_speed void
823	downheap (ANHE *heap, int N, int k)	951	downheap (ANHE *heap, int N, int k)
824	{	952	{
825	ANHE he = heap [k];	953	ANHE he = heap [k];
826	ANHE *E = heap + N + HEAP0;	954	ANHE *E = heap + N + HEAP0;
827		955
…		…
867	#define HEAP0 1	995	#define HEAP0 1
868	#define HPARENT(k) ((k) >> 1)	996	#define HPARENT(k) ((k) >> 1)
869	#define UPHEAP_DONE(p,k) (!(p))	997	#define UPHEAP_DONE(p,k) (!(p))
870		998
871	/* away from the root */	999	/* away from the root */
872	void inline_speed	1000	inline_speed void
873	downheap (ANHE *heap, int N, int k)	1001	downheap (ANHE *heap, int N, int k)
874	{	1002	{
875	ANHE he = heap [k];	1003	ANHE he = heap [k];
876		1004
877	for (;;)	1005	for (;;)
…		…
897	ev_active (ANHE_w (he)) = k;	1025	ev_active (ANHE_w (he)) = k;
898	}	1026	}
899	#endif	1027	#endif
900		1028
901	/* towards the root */	1029	/* towards the root */
902	void inline_speed	1030	inline_speed void
903	upheap (ANHE *heap, int k)	1031	upheap (ANHE *heap, int k)
904	{	1032	{
905	ANHE he = heap [k];	1033	ANHE he = heap [k];
906		1034
907	for (;;)	1035	for (;;)
…		…
918		1046
919	heap [k] = he;	1047	heap [k] = he;
920	ev_active (ANHE_w (he)) = k;	1048	ev_active (ANHE_w (he)) = k;
921	}	1049	}
922		1050
923	void inline_size	1051	/* move an element suitably so it is in a correct place */
		1052	inline_size void
924	adjustheap (ANHE *heap, int N, int k)	1053	adjustheap (ANHE *heap, int N, int k)
925	{	1054	{
926	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1055	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
927	upheap (heap, k);	1056	upheap (heap, k);
928	else	1057	else
929	downheap (heap, N, k);	1058	downheap (heap, N, k);
930	}	1059	}
931		1060
932	/* rebuild the heap: this function is used only once and executed rarely */	1061	/* rebuild the heap: this function is used only once and executed rarely */
933	void inline_size	1062	inline_size void
934	reheap (ANHE *heap, int N)	1063	reheap (ANHE *heap, int N)
935	{	1064	{
936	int i;	1065	int i;
		1066
937	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1067	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
938	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */	1068	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
939	for (i = 0; i < N; ++i)	1069	for (i = 0; i < N; ++i)
940	upheap (heap, i + HEAP0);	1070	upheap (heap, i + HEAP0);
941	}	1071	}
942		1072
943	#if EV_VERIFY
944	static void
945	checkheap (ANHE *heap, int N)
946	{
947	int i;
948
949	for (i = HEAP0; i < N + HEAP0; ++i)
950	{
951	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
952	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
953	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
954	}
955	}
956	#endif
957
958	/*****************************************************************************/	1073	/*****************************************************************************/
959		1074
		1075	/* associate signal watchers to a signal signal */
960	typedef struct	1076	typedef struct
961	{	1077	{
962	WL head;	1078	WL head;
963	EV_ATOMIC_T gotsig;	1079	EV_ATOMIC_T gotsig;
964	} ANSIG;	1080	} ANSIG;
…		…
966	static ANSIG *signals;	1082	static ANSIG *signals;
967	static int signalmax;	1083	static int signalmax;
968		1084
969	static EV_ATOMIC_T gotsig;	1085	static EV_ATOMIC_T gotsig;
970		1086
971	void inline_size
972	signals_init (ANSIG *base, int count)
973	{
974	while (count--)
975	{
976	base->head = 0;
977	base->gotsig = 0;
978
979	++base;
980	}
981	}
982
983	/*****************************************************************************/	1087	/*****************************************************************************/
984		1088
985	void inline_speed	1089	/* used to prepare libev internal fd's */
		1090	/* this is not fork-safe */
		1091	inline_speed void
986	fd_intern (int fd)	1092	fd_intern (int fd)
987	{	1093	{
988	#ifdef _WIN32	1094	#ifdef _WIN32
989	int arg = 1;	1095	unsigned long arg = 1;
990	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1096	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
991	#else	1097	#else
992	fcntl (fd, F_SETFD, FD_CLOEXEC);	1098	fcntl (fd, F_SETFD, FD_CLOEXEC);
993	fcntl (fd, F_SETFL, O_NONBLOCK);	1099	fcntl (fd, F_SETFL, O_NONBLOCK);
994	#endif	1100	#endif
995	}	1101	}
996		1102
997	static void noinline	1103	static void noinline
998	evpipe_init (EV_P)	1104	evpipe_init (EV_P)
999	{	1105	{
1000	if (!ev_is_active (&pipeev))	1106	if (!ev_is_active (&pipe_w))
1001	{	1107	{
1002	#if EV_USE_EVENTFD	1108	#if EV_USE_EVENTFD
1003	if ((evfd = eventfd (0, 0)) >= 0)	1109	if ((evfd = eventfd (0, 0)) >= 0)
1004	{	1110	{
1005	evpipe [0] = -1;	1111	evpipe [0] = -1;
1006	fd_intern (evfd);	1112	fd_intern (evfd);
1007	ev_io_set (&pipeev, evfd, EV_READ);	1113	ev_io_set (&pipe_w, evfd, EV_READ);
1008	}	1114	}
1009	else	1115	else
1010	#endif	1116	#endif
1011	{	1117	{
1012	while (pipe (evpipe))	1118	while (pipe (evpipe))
1013	syserr ("(libev) error creating signal/async pipe");	1119	ev_syserr ("(libev) error creating signal/async pipe");
1014		1120
1015	fd_intern (evpipe [0]);	1121	fd_intern (evpipe [0]);
1016	fd_intern (evpipe [1]);	1122	fd_intern (evpipe [1]);
1017	ev_io_set (&pipeev, evpipe [0], EV_READ);	1123	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1018	}	1124	}
1019		1125
1020	ev_io_start (EV_A_ &pipeev);	1126	ev_io_start (EV_A_ &pipe_w);
1021	ev_unref (EV_A); /* watcher should not keep loop alive */	1127	ev_unref (EV_A); /* watcher should not keep loop alive */
1022	}	1128	}
1023	}	1129	}
1024		1130
1025	void inline_size	1131	inline_size void
1026	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1132	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1027	{	1133	{
1028	if (!*flag)	1134	if (!*flag)
1029	{	1135	{
1030	int old_errno = errno; /* save errno because write might clobber it */	1136	int old_errno = errno; /* save errno because write might clobber it */
…		…
1043		1149
1044	errno = old_errno;	1150	errno = old_errno;
1045	}	1151	}
1046	}	1152	}
1047		1153
		1154	/* called whenever the libev signal pipe */
		1155	/* got some events (signal, async) */
1048	static void	1156	static void
1049	pipecb (EV_P_ ev_io *iow, int revents)	1157	pipecb (EV_P_ ev_io *iow, int revents)
1050	{	1158	{
1051	#if EV_USE_EVENTFD	1159	#if EV_USE_EVENTFD
1052	if (evfd >= 0)	1160	if (evfd >= 0)
…		…
1108	ev_feed_signal_event (EV_P_ int signum)	1216	ev_feed_signal_event (EV_P_ int signum)
1109	{	1217	{
1110	WL w;	1218	WL w;
1111		1219
1112	#if EV_MULTIPLICITY	1220	#if EV_MULTIPLICITY
1113	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1221	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1114	#endif	1222	#endif
1115		1223
1116	--signum;	1224	--signum;
1117		1225
1118	if (signum < 0 || signum >= signalmax)	1226	if (signum < 0 || signum >= signalmax)
…		…
1134		1242
1135	#ifndef WIFCONTINUED	1243	#ifndef WIFCONTINUED
1136	# define WIFCONTINUED(status) 0	1244	# define WIFCONTINUED(status) 0
1137	#endif	1245	#endif
1138		1246
1139	void inline_speed	1247	/* handle a single child status event */
		1248	inline_speed void
1140	child_reap (EV_P_ int chain, int pid, int status)	1249	child_reap (EV_P_ int chain, int pid, int status)
1141	{	1250	{
1142	ev_child *w;	1251	ev_child *w;
1143	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1252	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1144		1253
…		…
1157		1266
1158	#ifndef WCONTINUED	1267	#ifndef WCONTINUED
1159	# define WCONTINUED 0	1268	# define WCONTINUED 0
1160	#endif	1269	#endif
1161		1270
		1271	/* called on sigchld etc., calls waitpid */
1162	static void	1272	static void
1163	childcb (EV_P_ ev_signal *sw, int revents)	1273	childcb (EV_P_ ev_signal *sw, int revents)
1164	{	1274	{
1165	int pid, status;	1275	int pid, status;
1166		1276
…		…
1247	/* kqueue is borked on everything but netbsd apparently */	1357	/* kqueue is borked on everything but netbsd apparently */
1248	/* it usually doesn't work correctly on anything but sockets and pipes */	1358	/* it usually doesn't work correctly on anything but sockets and pipes */
1249	flags &= ~EVBACKEND_KQUEUE;	1359	flags &= ~EVBACKEND_KQUEUE;
1250	#endif	1360	#endif
1251	#ifdef __APPLE__	1361	#ifdef __APPLE__
1252	// flags &= ~EVBACKEND_KQUEUE; for documentation	1362	/* only select works correctly on that "unix-certified" platform */
1253	flags &= ~EVBACKEND_POLL;	1363	flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
		1364	flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1254	#endif	1365	#endif
1255		1366
1256	return flags;	1367	return flags;
1257	}	1368	}
1258		1369
…		…
1272	ev_backend (EV_P)	1383	ev_backend (EV_P)
1273	{	1384	{
1274	return backend;	1385	return backend;
1275	}	1386	}
1276		1387
		1388	#if EV_MINIMAL < 2
1277	unsigned int	1389	unsigned int
1278	ev_loop_count (EV_P)	1390	ev_loop_count (EV_P)
1279	{	1391	{
1280	return loop_count;	1392	return loop_count;
1281	}	1393	}
1282		1394
		1395	unsigned int
		1396	ev_loop_depth (EV_P)
		1397	{
		1398	return loop_depth;
		1399	}
		1400
1283	void	1401	void
1284	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1402	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1285	{	1403	{
1286	io_blocktime = interval;	1404	io_blocktime = interval;
1287	}	1405	}
…		…
1290	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1408	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1291	{	1409	{
1292	timeout_blocktime = interval;	1410	timeout_blocktime = interval;
1293	}	1411	}
1294		1412
		1413	void
		1414	ev_set_userdata (EV_P_ void *data)
		1415	{
		1416	userdata = data;
		1417	}
		1418
		1419	void *
		1420	ev_userdata (EV_P)
		1421	{
		1422	return userdata;
		1423	}
		1424
		1425	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1426	{
		1427	invoke_cb = invoke_pending_cb;
		1428	}
		1429
		1430	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1431	{
		1432	release_cb = release;
		1433	acquire_cb = acquire;
		1434	}
		1435	#endif
		1436
		1437	/* initialise a loop structure, must be zero-initialised */
1295	static void noinline	1438	static void noinline
1296	loop_init (EV_P_ unsigned int flags)	1439	loop_init (EV_P_ unsigned int flags)
1297	{	1440	{
1298	if (!backend)	1441	if (!backend)
1299	{	1442	{
		1443	#if EV_USE_REALTIME
		1444	if (!have_realtime)
		1445	{
		1446	struct timespec ts;
		1447
		1448	if (!clock_gettime (CLOCK_REALTIME, &ts))
		1449	have_realtime = 1;
		1450	}
		1451	#endif
		1452
1300	#if EV_USE_MONOTONIC	1453	#if EV_USE_MONOTONIC
		1454	if (!have_monotonic)
1301	{	1455	{
1302	struct timespec ts;	1456	struct timespec ts;
		1457
1303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1304	have_monotonic = 1;	1459	have_monotonic = 1;
1305	}	1460	}
1306	#endif	1461	#endif
1307		1462
1308	ev_rt_now = ev_time ();	1463	ev_rt_now = ev_time ();
1309	mn_now = get_clock ();	1464	mn_now = get_clock ();
1310	now_floor = mn_now;	1465	now_floor = mn_now;
1311	rtmn_diff = ev_rt_now - mn_now;	1466	rtmn_diff = ev_rt_now - mn_now;
		1467	#if EV_MINIMAL < 2
		1468	invoke_cb = ev_invoke_pending;
		1469	#endif
1312		1470
1313	io_blocktime = 0.;	1471	io_blocktime = 0.;
1314	timeout_blocktime = 0.;	1472	timeout_blocktime = 0.;
1315	backend = 0;	1473	backend = 0;
1316	backend_fd = -1;	1474	backend_fd = -1;
…		…
1347	#endif	1505	#endif
1348	#if EV_USE_SELECT	1506	#if EV_USE_SELECT
1349	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1507	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1350	#endif	1508	#endif
1351		1509
		1510	ev_prepare_init (&pending_w, pendingcb);
		1511
1352	ev_init (&pipeev, pipecb);	1512	ev_init (&pipe_w, pipecb);
1353	ev_set_priority (&pipeev, EV_MAXPRI);	1513	ev_set_priority (&pipe_w, EV_MAXPRI);
1354	}	1514	}
1355	}	1515	}
1356		1516
		1517	/* free up a loop structure */
1357	static void noinline	1518	static void noinline
1358	loop_destroy (EV_P)	1519	loop_destroy (EV_P)
1359	{	1520	{
1360	int i;	1521	int i;
1361		1522
1362	if (ev_is_active (&pipeev))	1523	if (ev_is_active (&pipe_w))
1363	{	1524	{
1364	ev_ref (EV_A); /* signal watcher */	1525	ev_ref (EV_A); /* signal watcher */
1365	ev_io_stop (EV_A_ &pipeev);	1526	ev_io_stop (EV_A_ &pipe_w);
1366		1527
1367	#if EV_USE_EVENTFD	1528	#if EV_USE_EVENTFD
1368	if (evfd >= 0)	1529	if (evfd >= 0)
1369	close (evfd);	1530	close (evfd);
1370	#endif	1531	#endif
…		…
1409	}	1570	}
1410		1571
1411	ev_free (anfds); anfdmax = 0;	1572	ev_free (anfds); anfdmax = 0;
1412		1573
1413	/* have to use the microsoft-never-gets-it-right macro */	1574	/* have to use the microsoft-never-gets-it-right macro */
		1575	array_free (rfeed, EMPTY);
1414	array_free (fdchange, EMPTY);	1576	array_free (fdchange, EMPTY);
1415	array_free (timer, EMPTY);	1577	array_free (timer, EMPTY);
1416	#if EV_PERIODIC_ENABLE	1578	#if EV_PERIODIC_ENABLE
1417	array_free (periodic, EMPTY);	1579	array_free (periodic, EMPTY);
1418	#endif	1580	#endif
…		…
1427		1589
1428	backend = 0;	1590	backend = 0;
1429	}	1591	}
1430		1592
1431	#if EV_USE_INOTIFY	1593	#if EV_USE_INOTIFY
1432	void inline_size infy_fork (EV_P);	1594	inline_size void infy_fork (EV_P);
1433	#endif	1595	#endif
1434		1596
1435	void inline_size	1597	inline_size void
1436	loop_fork (EV_P)	1598	loop_fork (EV_P)
1437	{	1599	{
1438	#if EV_USE_PORT	1600	#if EV_USE_PORT
1439	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1601	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1440	#endif	1602	#endif
…		…
1446	#endif	1608	#endif
1447	#if EV_USE_INOTIFY	1609	#if EV_USE_INOTIFY
1448	infy_fork (EV_A);	1610	infy_fork (EV_A);
1449	#endif	1611	#endif
1450		1612
1451	if (ev_is_active (&pipeev))	1613	if (ev_is_active (&pipe_w))
1452	{	1614	{
1453	/* this "locks" the handlers against writing to the pipe */	1615	/* this "locks" the handlers against writing to the pipe */
1454	/* while we modify the fd vars */	1616	/* while we modify the fd vars */
1455	gotsig = 1;	1617	gotsig = 1;
1456	#if EV_ASYNC_ENABLE	1618	#if EV_ASYNC_ENABLE
1457	gotasync = 1;	1619	gotasync = 1;
1458	#endif	1620	#endif
1459		1621
1460	ev_ref (EV_A);	1622	ev_ref (EV_A);
1461	ev_io_stop (EV_A_ &pipeev);	1623	ev_io_stop (EV_A_ &pipe_w);
1462		1624
1463	#if EV_USE_EVENTFD	1625	#if EV_USE_EVENTFD
1464	if (evfd >= 0)	1626	if (evfd >= 0)
1465	close (evfd);	1627	close (evfd);
1466	#endif	1628	#endif
…		…
1471	close (evpipe [1]);	1633	close (evpipe [1]);
1472	}	1634	}
1473		1635
1474	evpipe_init (EV_A);	1636	evpipe_init (EV_A);
1475	/* now iterate over everything, in case we missed something */	1637	/* now iterate over everything, in case we missed something */
1476	pipecb (EV_A_ &pipeev, EV_READ);	1638	pipecb (EV_A_ &pipe_w, EV_READ);
1477	}	1639	}
1478		1640
1479	postfork = 0;	1641	postfork = 0;
1480	}	1642	}
1481		1643
1482	#if EV_MULTIPLICITY	1644	#if EV_MULTIPLICITY
		1645
1483	struct ev_loop *	1646	struct ev_loop *
1484	ev_loop_new (unsigned int flags)	1647	ev_loop_new (unsigned int flags)
1485	{	1648	{
1486	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1649	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1487		1650
…		…
1505	void	1668	void
1506	ev_loop_fork (EV_P)	1669	ev_loop_fork (EV_P)
1507	{	1670	{
1508	postfork = 1; /* must be in line with ev_default_fork */	1671	postfork = 1; /* must be in line with ev_default_fork */
1509	}	1672	}
		1673	#endif /* multiplicity */
1510		1674
1511	#if EV_VERIFY	1675	#if EV_VERIFY
1512	static void	1676	static void noinline
		1677	verify_watcher (EV_P_ W w)
		1678	{
		1679	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1680
		1681	if (w->pending)
		1682	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1683	}
		1684
		1685	static void noinline
		1686	verify_heap (EV_P_ ANHE *heap, int N)
		1687	{
		1688	int i;
		1689
		1690	for (i = HEAP0; i < N + HEAP0; ++i)
		1691	{
		1692	assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1693	assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1694	assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1695
		1696	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1697	}
		1698	}
		1699
		1700	static void noinline
1513	array_check (W **ws, int cnt)	1701	array_verify (EV_P_ W *ws, int cnt)
1514	{	1702	{
1515	while (cnt--)	1703	while (cnt--)
		1704	{
1516	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));	1705	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1706	verify_watcher (EV_A_ ws [cnt]);
		1707	}
1517	}	1708	}
		1709	#endif
1518		1710
1519	static void	1711	#if EV_MINIMAL < 2
		1712	void
1520	ev_loop_verify (EV_P)	1713	ev_loop_verify (EV_P)
1521	{	1714	{
		1715	#if EV_VERIFY
1522	int i;	1716	int i;
		1717	WL w;
1523		1718
		1719	assert (activecnt >= -1);
		1720
		1721	assert (fdchangemax >= fdchangecnt);
		1722	for (i = 0; i < fdchangecnt; ++i)
		1723	assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
		1724
		1725	assert (anfdmax >= 0);
		1726	for (i = 0; i < anfdmax; ++i)
		1727	for (w = anfds [i].head; w; w = w->next)
		1728	{
		1729	verify_watcher (EV_A_ (W)w);
		1730	assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
		1731	assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		1732	}
		1733
		1734	assert (timermax >= timercnt);
1524	checkheap (timers, timercnt);	1735	verify_heap (EV_A_ timers, timercnt);
		1736
1525	#if EV_PERIODIC_ENABLE	1737	#if EV_PERIODIC_ENABLE
		1738	assert (periodicmax >= periodiccnt);
1526	checkheap (periodics, periodiccnt);	1739	verify_heap (EV_A_ periodics, periodiccnt);
1527	#endif	1740	#endif
1528		1741
		1742	for (i = NUMPRI; i--; )
		1743	{
		1744	assert (pendingmax [i] >= pendingcnt [i]);
1529	#if EV_IDLE_ENABLE	1745	#if EV_IDLE_ENABLE
1530	for (i = NUMPRI; i--; )	1746	assert (idleall >= 0);
		1747	assert (idlemax [i] >= idlecnt [i]);
1531	array_check ((W **)idles [i], idlecnt [i]);	1748	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1532	#endif	1749	#endif
		1750	}
		1751
1533	#if EV_FORK_ENABLE	1752	#if EV_FORK_ENABLE
		1753	assert (forkmax >= forkcnt);
1534	array_check ((W **)forks, forkcnt);	1754	array_verify (EV_A_ (W *)forks, forkcnt);
1535	#endif	1755	#endif
1536	array_check ((W **)prepares, preparecnt);	1756
1537	array_check ((W **)checks, checkcnt);
1538	#if EV_ASYNC_ENABLE	1757	#if EV_ASYNC_ENABLE
		1758	assert (asyncmax >= asynccnt);
1539	array_check ((W **)asyncs, asynccnt);	1759	array_verify (EV_A_ (W *)asyncs, asynccnt);
		1760	#endif
		1761
		1762	assert (preparemax >= preparecnt);
		1763	array_verify (EV_A_ (W *)prepares, preparecnt);
		1764
		1765	assert (checkmax >= checkcnt);
		1766	array_verify (EV_A_ (W *)checks, checkcnt);
		1767
		1768	# if 0
		1769	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1770	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1540	#endif	1771	# endif
1541	}
1542	#endif	1772	#endif
1543		1773	}
1544	#endif	1774	#endif
1545		1775
1546	#if EV_MULTIPLICITY	1776	#if EV_MULTIPLICITY
1547	struct ev_loop *	1777	struct ev_loop *
1548	ev_default_loop_init (unsigned int flags)	1778	ev_default_loop_init (unsigned int flags)
…		…
1582	{	1812	{
1583	#if EV_MULTIPLICITY	1813	#if EV_MULTIPLICITY
1584	struct ev_loop *loop = ev_default_loop_ptr;	1814	struct ev_loop *loop = ev_default_loop_ptr;
1585	#endif	1815	#endif
1586		1816
		1817	ev_default_loop_ptr = 0;
		1818
1587	#ifndef _WIN32	1819	#ifndef _WIN32
1588	ev_ref (EV_A); /* child watcher */	1820	ev_ref (EV_A); /* child watcher */
1589	ev_signal_stop (EV_A_ &childev);	1821	ev_signal_stop (EV_A_ &childev);
1590	#endif	1822	#endif
1591		1823
…		…
1597	{	1829	{
1598	#if EV_MULTIPLICITY	1830	#if EV_MULTIPLICITY
1599	struct ev_loop *loop = ev_default_loop_ptr;	1831	struct ev_loop *loop = ev_default_loop_ptr;
1600	#endif	1832	#endif
1601		1833
1602	if (backend)
1603	postfork = 1; /* must be in line with ev_loop_fork */	1834	postfork = 1; /* must be in line with ev_loop_fork */
1604	}	1835	}
1605		1836
1606	/*****************************************************************************/	1837	/*****************************************************************************/
1607		1838
1608	void	1839	void
1609	ev_invoke (EV_P_ void *w, int revents)	1840	ev_invoke (EV_P_ void *w, int revents)
1610	{	1841	{
1611	EV_CB_INVOKE ((W)w, revents);	1842	EV_CB_INVOKE ((W)w, revents);
1612	}	1843	}
1613		1844
1614	void inline_speed	1845	unsigned int
1615	call_pending (EV_P)	1846	ev_pending_count (EV_P)
1616	{	1847	{
1617	int pri;	1848	int pri;
		1849	unsigned int count = 0;
1618		1850
1619	EV_FREQUENT_CHECK;	1851	for (pri = NUMPRI; pri--; )
		1852	count += pendingcnt [pri];
		1853
		1854	return count;
		1855	}
		1856
		1857	void noinline
		1858	ev_invoke_pending (EV_P)
		1859	{
		1860	int pri;
1620		1861
1621	for (pri = NUMPRI; pri--; )	1862	for (pri = NUMPRI; pri--; )
1622	while (pendingcnt [pri])	1863	while (pendingcnt [pri])
1623	{	1864	{
1624	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1865	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1625		1866
1626	if (expect_true (p->w))
1627	{
1628	/*assert (("non-pending watcher on pending list", p->w->pending));*/	1867	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1868	/* ^ this is no longer true, as pending_w could be here */
1629		1869
1630	p->w->pending = 0;	1870	p->w->pending = 0;
1631	EV_CB_INVOKE (p->w, p->events);	1871	EV_CB_INVOKE (p->w, p->events);
1632	}	1872	EV_FREQUENT_CHECK;
1633	}	1873	}
1634
1635	EV_FREQUENT_CHECK;
1636	}	1874	}
1637		1875
1638	#if EV_IDLE_ENABLE	1876	#if EV_IDLE_ENABLE
1639	void inline_size	1877	/* make idle watchers pending. this handles the "call-idle */
		1878	/* only when higher priorities are idle" logic */
		1879	inline_size void
1640	idle_reify (EV_P)	1880	idle_reify (EV_P)
1641	{	1881	{
1642	if (expect_false (idleall))	1882	if (expect_false (idleall))
1643	{	1883	{
1644	int pri;	1884	int pri;
…		…
1656	}	1896	}
1657	}	1897	}
1658	}	1898	}
1659	#endif	1899	#endif
1660		1900
1661	void inline_size	1901	/* make timers pending */
		1902	inline_size void
1662	timers_reify (EV_P)	1903	timers_reify (EV_P)
1663	{	1904	{
1664	EV_FREQUENT_CHECK;	1905	EV_FREQUENT_CHECK;
1665		1906
1666	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1907	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1667	{	1908	{
1668	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	1909	do
1669
1670	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1671
1672	/* first reschedule or stop timer */
1673	if (w->repeat)
1674	{	1910	{
		1911	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1912
		1913	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		1914
		1915	/* first reschedule or stop timer */
		1916	if (w->repeat)
		1917	{
1675	ev_at (w) += w->repeat;	1918	ev_at (w) += w->repeat;
1676	if (ev_at (w) < mn_now)	1919	if (ev_at (w) < mn_now)
1677	ev_at (w) = mn_now;	1920	ev_at (w) = mn_now;
1678		1921
1679	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1922	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1680		1923
1681	ANHE_at_cache (timers [HEAP0]);	1924	ANHE_at_cache (timers [HEAP0]);
1682	downheap (timers, timercnt, HEAP0);	1925	downheap (timers, timercnt, HEAP0);
		1926	}
		1927	else
		1928	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1929
		1930	EV_FREQUENT_CHECK;
		1931	feed_reverse (EV_A_ (W)w);
1683	}	1932	}
1684	else	1933	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1685	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1686		1934
1687	EV_FREQUENT_CHECK;
1688	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1935	feed_reverse_done (EV_A_ EV_TIMEOUT);
1689	}	1936	}
1690	}	1937	}
1691		1938
1692	#if EV_PERIODIC_ENABLE	1939	#if EV_PERIODIC_ENABLE
1693	void inline_size	1940	/* make periodics pending */
		1941	inline_size void
1694	periodics_reify (EV_P)	1942	periodics_reify (EV_P)
1695	{	1943	{
1696	EV_FREQUENT_CHECK;	1944	EV_FREQUENT_CHECK;
		1945
1697	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1946	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1698	{	1947	{
1699	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	1948	int feed_count = 0;
1700		1949
1701	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/	1950	do
1702
1703	/* first reschedule or stop timer */
1704	if (w->reschedule_cb)
1705	{	1951	{
		1952	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1953
		1954	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		1955
		1956	/* first reschedule or stop timer */
		1957	if (w->reschedule_cb)
		1958	{
1706	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1959	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1707		1960
1708	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1961	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1709		1962
1710	ANHE_at_cache (periodics [HEAP0]);	1963	ANHE_at_cache (periodics [HEAP0]);
1711	downheap (periodics, periodiccnt, HEAP0);	1964	downheap (periodics, periodiccnt, HEAP0);
		1965	}
		1966	else if (w->interval)
		1967	{
		1968	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1969	/* if next trigger time is not sufficiently in the future, put it there */
		1970	/* this might happen because of floating point inexactness */
		1971	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1972	{
		1973	ev_at (w) += w->interval;
		1974
		1975	/* if interval is unreasonably low we might still have a time in the past */
		1976	/* so correct this. this will make the periodic very inexact, but the user */
		1977	/* has effectively asked to get triggered more often than possible */
		1978	if (ev_at (w) < ev_rt_now)
		1979	ev_at (w) = ev_rt_now;
		1980	}
		1981
		1982	ANHE_at_cache (periodics [HEAP0]);
		1983	downheap (periodics, periodiccnt, HEAP0);
		1984	}
		1985	else
		1986	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1987
1712	EV_FREQUENT_CHECK;	1988	EV_FREQUENT_CHECK;
		1989	feed_reverse (EV_A_ (W)w);
1713	}	1990	}
1714	else if (w->interval)	1991	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1715	{
1716	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1717	/* if next trigger time is not sufficiently in the future, put it there */
1718	/* this might happen because of floating point inexactness */
1719	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1720	{
1721	ev_at (w) += w->interval;
1722		1992
1723	/* if interval is unreasonably low we might still have a time in the past */
1724	/* so correct this. this will make the periodic very inexact, but the user */
1725	/* has effectively asked to get triggered more often than possible */
1726	if (ev_at (w) < ev_rt_now)
1727	ev_at (w) = ev_rt_now;
1728	}
1729
1730	ANHE_at_cache (periodics [HEAP0]);
1731	downheap (periodics, periodiccnt, HEAP0);
1732	}
1733	else
1734	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1735
1736	EV_FREQUENT_CHECK;
1737	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1993	feed_reverse_done (EV_A_ EV_PERIODIC);
1738	}	1994	}
1739	}	1995	}
1740		1996
		1997	/* simply recalculate all periodics */
		1998	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1741	static void noinline	1999	static void noinline
1742	periodics_reschedule (EV_P)	2000	periodics_reschedule (EV_P)
1743	{	2001	{
1744	int i;	2002	int i;
1745		2003
…		…
1758		2016
1759	reheap (periodics, periodiccnt);	2017	reheap (periodics, periodiccnt);
1760	}	2018	}
1761	#endif	2019	#endif
1762		2020
1763	void inline_speed	2021	/* adjust all timers by a given offset */
		2022	static void noinline
		2023	timers_reschedule (EV_P_ ev_tstamp adjust)
		2024	{
		2025	int i;
		2026
		2027	for (i = 0; i < timercnt; ++i)
		2028	{
		2029	ANHE *he = timers + i + HEAP0;
		2030	ANHE_w (*he)->at += adjust;
		2031	ANHE_at_cache (*he);
		2032	}
		2033	}
		2034
		2035	/* fetch new monotonic and realtime times from the kernel */
		2036	/* also detetc if there was a timejump, and act accordingly */
		2037	inline_speed void
1764	time_update (EV_P_ ev_tstamp max_block)	2038	time_update (EV_P_ ev_tstamp max_block)
1765	{	2039	{
1766	int i;
1767
1768	#if EV_USE_MONOTONIC	2040	#if EV_USE_MONOTONIC
1769	if (expect_true (have_monotonic))	2041	if (expect_true (have_monotonic))
1770	{	2042	{
		2043	int i;
1771	ev_tstamp odiff = rtmn_diff;	2044	ev_tstamp odiff = rtmn_diff;
1772		2045
1773	mn_now = get_clock ();	2046	mn_now = get_clock ();
1774		2047
1775	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	2048	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1801	ev_rt_now = ev_time ();	2074	ev_rt_now = ev_time ();
1802	mn_now = get_clock ();	2075	mn_now = get_clock ();
1803	now_floor = mn_now;	2076	now_floor = mn_now;
1804	}	2077	}
1805		2078
		2079	/* no timer adjustment, as the monotonic clock doesn't jump */
		2080	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1806	# if EV_PERIODIC_ENABLE	2081	# if EV_PERIODIC_ENABLE
1807	periodics_reschedule (EV_A);	2082	periodics_reschedule (EV_A);
1808	# endif	2083	# endif
1809	/* no timer adjustment, as the monotonic clock doesn't jump */
1810	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1811	}	2084	}
1812	else	2085	else
1813	#endif	2086	#endif
1814	{	2087	{
1815	ev_rt_now = ev_time ();	2088	ev_rt_now = ev_time ();
1816		2089
1817	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2090	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1818	{	2091	{
		2092	/* adjust timers. this is easy, as the offset is the same for all of them */
		2093	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1819	#if EV_PERIODIC_ENABLE	2094	#if EV_PERIODIC_ENABLE
1820	periodics_reschedule (EV_A);	2095	periodics_reschedule (EV_A);
1821	#endif	2096	#endif
1822	/* adjust timers. this is easy, as the offset is the same for all of them */
1823	for (i = 0; i < timercnt; ++i)
1824	{
1825	ANHE *he = timers + i + HEAP0;
1826	ANHE_w (*he)->at += ev_rt_now - mn_now;
1827	ANHE_at_cache (*he);
1828	}
1829	}	2097	}
1830		2098
1831	mn_now = ev_rt_now;	2099	mn_now = ev_rt_now;
1832	}	2100	}
1833	}	2101	}
1834		2102
1835	void	2103	void
1836	ev_ref (EV_P)
1837	{
1838	++activecnt;
1839	}
1840
1841	void
1842	ev_unref (EV_P)
1843	{
1844	--activecnt;
1845	}
1846
1847	static int loop_done;
1848
1849	void
1850	ev_loop (EV_P_ int flags)	2104	ev_loop (EV_P_ int flags)
1851	{	2105	{
		2106	#if EV_MINIMAL < 2
		2107	++loop_depth;
		2108	#endif
		2109
		2110	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
		2111
1852	loop_done = EVUNLOOP_CANCEL;	2112	loop_done = EVUNLOOP_CANCEL;
1853		2113
1854	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2114	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1855		2115
1856	do	2116	do
1857	{	2117	{
		2118	#if EV_VERIFY >= 2
		2119	ev_loop_verify (EV_A);
		2120	#endif
		2121
1858	#ifndef _WIN32	2122	#ifndef _WIN32
1859	if (expect_false (curpid)) /* penalise the forking check even more */	2123	if (expect_false (curpid)) /* penalise the forking check even more */
1860	if (expect_false (getpid () != curpid))	2124	if (expect_false (getpid () != curpid))
1861	{	2125	{
1862	curpid = getpid ();	2126	curpid = getpid ();
…		…
1868	/* we might have forked, so queue fork handlers */	2132	/* we might have forked, so queue fork handlers */
1869	if (expect_false (postfork))	2133	if (expect_false (postfork))
1870	if (forkcnt)	2134	if (forkcnt)
1871	{	2135	{
1872	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2136	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1873	call_pending (EV_A);	2137	EV_INVOKE_PENDING;
1874	}	2138	}
1875	#endif	2139	#endif
1876		2140
1877	/* queue prepare watchers (and execute them) */	2141	/* queue prepare watchers (and execute them) */
1878	if (expect_false (preparecnt))	2142	if (expect_false (preparecnt))
1879	{	2143	{
1880	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2144	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1881	call_pending (EV_A);	2145	EV_INVOKE_PENDING;
1882	}	2146	}
1883		2147
1884	if (expect_false (!activecnt))	2148	if (expect_false (loop_done))
1885	break;	2149	break;
1886		2150
1887	/* we might have forked, so reify kernel state if necessary */	2151	/* we might have forked, so reify kernel state if necessary */
1888	if (expect_false (postfork))	2152	if (expect_false (postfork))
1889	loop_fork (EV_A);	2153	loop_fork (EV_A);
…		…
1896	ev_tstamp waittime = 0.;	2160	ev_tstamp waittime = 0.;
1897	ev_tstamp sleeptime = 0.;	2161	ev_tstamp sleeptime = 0.;
1898		2162
1899	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2163	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1900	{	2164	{
		2165	/* remember old timestamp for io_blocktime calculation */
		2166	ev_tstamp prev_mn_now = mn_now;
		2167
1901	/* update time to cancel out callback processing overhead */	2168	/* update time to cancel out callback processing overhead */
1902	time_update (EV_A_ 1e100);	2169	time_update (EV_A_ 1e100);
1903		2170
1904	waittime = MAX_BLOCKTIME;	2171	waittime = MAX_BLOCKTIME;
1905		2172
…		…
1915	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2182	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1916	if (waittime > to) waittime = to;	2183	if (waittime > to) waittime = to;
1917	}	2184	}
1918	#endif	2185	#endif
1919		2186
		2187	/* don't let timeouts decrease the waittime below timeout_blocktime */
1920	if (expect_false (waittime < timeout_blocktime))	2188	if (expect_false (waittime < timeout_blocktime))
1921	waittime = timeout_blocktime;	2189	waittime = timeout_blocktime;
1922		2190
1923	sleeptime = waittime - backend_fudge;	2191	/* extra check because io_blocktime is commonly 0 */
1924
1925	if (expect_true (sleeptime > io_blocktime))	2192	if (expect_false (io_blocktime))
1926	sleeptime = io_blocktime;
1927
1928	if (sleeptime)
1929	{	2193	{
		2194	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2195
		2196	if (sleeptime > waittime - backend_fudge)
		2197	sleeptime = waittime - backend_fudge;
		2198
		2199	if (expect_true (sleeptime > 0.))
		2200	{
1930	ev_sleep (sleeptime);	2201	ev_sleep (sleeptime);
1931	waittime -= sleeptime;	2202	waittime -= sleeptime;
		2203	}
1932	}	2204	}
1933	}	2205	}
1934		2206
		2207	#if EV_MINIMAL < 2
1935	++loop_count;	2208	++loop_count;
		2209	#endif
		2210	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
1936	backend_poll (EV_A_ waittime);	2211	backend_poll (EV_A_ waittime);
		2212	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
1937		2213
1938	/* update ev_rt_now, do magic */	2214	/* update ev_rt_now, do magic */
1939	time_update (EV_A_ waittime + sleeptime);	2215	time_update (EV_A_ waittime + sleeptime);
1940	}	2216	}
1941		2217
…		…
1952		2228
1953	/* queue check watchers, to be executed first */	2229	/* queue check watchers, to be executed first */
1954	if (expect_false (checkcnt))	2230	if (expect_false (checkcnt))
1955	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2231	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1956		2232
1957	call_pending (EV_A);	2233	EV_INVOKE_PENDING;
1958	}	2234	}
1959	while (expect_true (	2235	while (expect_true (
1960	activecnt	2236	activecnt
1961	&& !loop_done	2237	&& !loop_done
1962	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2238	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1963	));	2239	));
1964		2240
1965	if (loop_done == EVUNLOOP_ONE)	2241	if (loop_done == EVUNLOOP_ONE)
1966	loop_done = EVUNLOOP_CANCEL;	2242	loop_done = EVUNLOOP_CANCEL;
		2243
		2244	#if EV_MINIMAL < 2
		2245	--loop_depth;
		2246	#endif
1967	}	2247	}
1968		2248
1969	void	2249	void
1970	ev_unloop (EV_P_ int how)	2250	ev_unloop (EV_P_ int how)
1971	{	2251	{
1972	loop_done = how;	2252	loop_done = how;
1973	}	2253	}
1974		2254
		2255	void
		2256	ev_ref (EV_P)
		2257	{
		2258	++activecnt;
		2259	}
		2260
		2261	void
		2262	ev_unref (EV_P)
		2263	{
		2264	--activecnt;
		2265	}
		2266
		2267	void
		2268	ev_now_update (EV_P)
		2269	{
		2270	time_update (EV_A_ 1e100);
		2271	}
		2272
		2273	void
		2274	ev_suspend (EV_P)
		2275	{
		2276	ev_now_update (EV_A);
		2277	}
		2278
		2279	void
		2280	ev_resume (EV_P)
		2281	{
		2282	ev_tstamp mn_prev = mn_now;
		2283
		2284	ev_now_update (EV_A);
		2285	timers_reschedule (EV_A_ mn_now - mn_prev);
		2286	#if EV_PERIODIC_ENABLE
		2287	/* TODO: really do this? */
		2288	periodics_reschedule (EV_A);
		2289	#endif
		2290	}
		2291
1975	/*****************************************************************************/	2292	/*****************************************************************************/
		2293	/* singly-linked list management, used when the expected list length is short */
1976		2294
1977	void inline_size	2295	inline_size void
1978	wlist_add (WL *head, WL elem)	2296	wlist_add (WL *head, WL elem)
1979	{	2297	{
1980	elem->next = *head;	2298	elem->next = *head;
1981	*head = elem;	2299	*head = elem;
1982	}	2300	}
1983		2301
1984	void inline_size	2302	inline_size void
1985	wlist_del (WL *head, WL elem)	2303	wlist_del (WL *head, WL elem)
1986	{	2304	{
1987	while (*head)	2305	while (*head)
1988	{	2306	{
1989	if (*head == elem)	2307	if (*head == elem)
…		…
1994		2312
1995	head = &(*head)->next;	2313	head = &(*head)->next;
1996	}	2314	}
1997	}	2315	}
1998		2316
1999	void inline_speed	2317	/* internal, faster, version of ev_clear_pending */
		2318	inline_speed void
2000	clear_pending (EV_P_ W w)	2319	clear_pending (EV_P_ W w)
2001	{	2320	{
2002	if (w->pending)	2321	if (w->pending)
2003	{	2322	{
2004	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2323	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2005	w->pending = 0;	2324	w->pending = 0;
2006	}	2325	}
2007	}	2326	}
2008		2327
2009	int	2328	int
…		…
2013	int pending = w_->pending;	2332	int pending = w_->pending;
2014		2333
2015	if (expect_true (pending))	2334	if (expect_true (pending))
2016	{	2335	{
2017	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2336	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2337	p->w = (W)&pending_w;
2018	w_->pending = 0;	2338	w_->pending = 0;
2019	p->w = 0;
2020	return p->events;	2339	return p->events;
2021	}	2340	}
2022	else	2341	else
2023	return 0;	2342	return 0;
2024	}	2343	}
2025		2344
2026	void inline_size	2345	inline_size void
2027	pri_adjust (EV_P_ W w)	2346	pri_adjust (EV_P_ W w)
2028	{	2347	{
2029	int pri = w->priority;	2348	int pri = ev_priority (w);
2030	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2349	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2031	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2350	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2032	w->priority = pri;	2351	ev_set_priority (w, pri);
2033	}	2352	}
2034		2353
2035	void inline_speed	2354	inline_speed void
2036	ev_start (EV_P_ W w, int active)	2355	ev_start (EV_P_ W w, int active)
2037	{	2356	{
2038	pri_adjust (EV_A_ w);	2357	pri_adjust (EV_A_ w);
2039	w->active = active;	2358	w->active = active;
2040	ev_ref (EV_A);	2359	ev_ref (EV_A);
2041	}	2360	}
2042		2361
2043	void inline_size	2362	inline_size void
2044	ev_stop (EV_P_ W w)	2363	ev_stop (EV_P_ W w)
2045	{	2364	{
2046	ev_unref (EV_A);	2365	ev_unref (EV_A);
2047	w->active = 0;	2366	w->active = 0;
2048	}	2367	}
…		…
2055	int fd = w->fd;	2374	int fd = w->fd;
2056		2375
2057	if (expect_false (ev_is_active (w)))	2376	if (expect_false (ev_is_active (w)))
2058	return;	2377	return;
2059		2378
2060	assert (("ev_io_start called with negative fd", fd >= 0));	2379	assert (("libev: ev_io_start called with negative fd", fd >= 0));
		2380	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2061		2381
2062	EV_FREQUENT_CHECK;	2382	EV_FREQUENT_CHECK;
2063		2383
2064	ev_start (EV_A_ (W)w, 1);	2384	ev_start (EV_A_ (W)w, 1);
2065	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2385	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2066	wlist_add (&anfds[fd].head, (WL)w);	2386	wlist_add (&anfds[fd].head, (WL)w);
2067		2387
2068	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);	2388	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2069	w->events &= ~EV_IOFDSET;	2389	w->events &= ~EV__IOFDSET;
2070		2390
2071	EV_FREQUENT_CHECK;	2391	EV_FREQUENT_CHECK;
2072	}	2392	}
2073		2393
2074	void noinline	2394	void noinline
…		…
2076	{	2396	{
2077	clear_pending (EV_A_ (W)w);	2397	clear_pending (EV_A_ (W)w);
2078	if (expect_false (!ev_is_active (w)))	2398	if (expect_false (!ev_is_active (w)))
2079	return;	2399	return;
2080		2400
2081	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2401	assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2082		2402
2083	EV_FREQUENT_CHECK;	2403	EV_FREQUENT_CHECK;
2084		2404
2085	wlist_del (&anfds[w->fd].head, (WL)w);	2405	wlist_del (&anfds[w->fd].head, (WL)w);
2086	ev_stop (EV_A_ (W)w);	2406	ev_stop (EV_A_ (W)w);
…		…
2096	if (expect_false (ev_is_active (w)))	2416	if (expect_false (ev_is_active (w)))
2097	return;	2417	return;
2098		2418
2099	ev_at (w) += mn_now;	2419	ev_at (w) += mn_now;
2100		2420
2101	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2421	assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2102		2422
2103	EV_FREQUENT_CHECK;	2423	EV_FREQUENT_CHECK;
2104		2424
2105	++timercnt;	2425	++timercnt;
2106	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);	2426	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
…		…
2109	ANHE_at_cache (timers [ev_active (w)]);	2429	ANHE_at_cache (timers [ev_active (w)]);
2110	upheap (timers, ev_active (w));	2430	upheap (timers, ev_active (w));
2111		2431
2112	EV_FREQUENT_CHECK;	2432	EV_FREQUENT_CHECK;
2113		2433
2114	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/	2434	/*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2115	}	2435	}
2116		2436
2117	void noinline	2437	void noinline
2118	ev_timer_stop (EV_P_ ev_timer *w)	2438	ev_timer_stop (EV_P_ ev_timer *w)
2119	{	2439	{
…		…
2124	EV_FREQUENT_CHECK;	2444	EV_FREQUENT_CHECK;
2125		2445
2126	{	2446	{
2127	int active = ev_active (w);	2447	int active = ev_active (w);
2128		2448
2129	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));	2449	assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2130		2450
2131	--timercnt;	2451	--timercnt;
2132		2452
2133	if (expect_true (active < timercnt + HEAP0))	2453	if (expect_true (active < timercnt + HEAP0))
2134	{	2454	{
…		…
2167	}	2487	}
2168		2488
2169	EV_FREQUENT_CHECK;	2489	EV_FREQUENT_CHECK;
2170	}	2490	}
2171		2491
		2492	ev_tstamp
		2493	ev_timer_remaining (EV_P_ ev_timer *w)
		2494	{
		2495	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2496	}
		2497
2172	#if EV_PERIODIC_ENABLE	2498	#if EV_PERIODIC_ENABLE
2173	void noinline	2499	void noinline
2174	ev_periodic_start (EV_P_ ev_periodic *w)	2500	ev_periodic_start (EV_P_ ev_periodic *w)
2175	{	2501	{
2176	if (expect_false (ev_is_active (w)))	2502	if (expect_false (ev_is_active (w)))
…		…
2178		2504
2179	if (w->reschedule_cb)	2505	if (w->reschedule_cb)
2180	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2506	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2181	else if (w->interval)	2507	else if (w->interval)
2182	{	2508	{
2183	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2509	assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2184	/* this formula differs from the one in periodic_reify because we do not always round up */	2510	/* this formula differs from the one in periodic_reify because we do not always round up */
2185	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2511	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2186	}	2512	}
2187	else	2513	else
2188	ev_at (w) = w->offset;	2514	ev_at (w) = w->offset;
…		…
2196	ANHE_at_cache (periodics [ev_active (w)]);	2522	ANHE_at_cache (periodics [ev_active (w)]);
2197	upheap (periodics, ev_active (w));	2523	upheap (periodics, ev_active (w));
2198		2524
2199	EV_FREQUENT_CHECK;	2525	EV_FREQUENT_CHECK;
2200		2526
2201	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/	2527	/*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2202	}	2528	}
2203		2529
2204	void noinline	2530	void noinline
2205	ev_periodic_stop (EV_P_ ev_periodic *w)	2531	ev_periodic_stop (EV_P_ ev_periodic *w)
2206	{	2532	{
…		…
2211	EV_FREQUENT_CHECK;	2537	EV_FREQUENT_CHECK;
2212		2538
2213	{	2539	{
2214	int active = ev_active (w);	2540	int active = ev_active (w);
2215		2541
2216	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));	2542	assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2217		2543
2218	--periodiccnt;	2544	--periodiccnt;
2219		2545
2220	if (expect_true (active < periodiccnt + HEAP0))	2546	if (expect_true (active < periodiccnt + HEAP0))
2221	{	2547	{
…		…
2244		2570
2245	void noinline	2571	void noinline
2246	ev_signal_start (EV_P_ ev_signal *w)	2572	ev_signal_start (EV_P_ ev_signal *w)
2247	{	2573	{
2248	#if EV_MULTIPLICITY	2574	#if EV_MULTIPLICITY
2249	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2575	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2250	#endif	2576	#endif
2251	if (expect_false (ev_is_active (w)))	2577	if (expect_false (ev_is_active (w)))
2252	return;	2578	return;
2253		2579
2254	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2580	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2255		2581
2256	evpipe_init (EV_A);	2582	evpipe_init (EV_A);
2257		2583
2258	EV_FREQUENT_CHECK;	2584	EV_FREQUENT_CHECK;
2259		2585
…		…
2262	sigset_t full, prev;	2588	sigset_t full, prev;
2263	sigfillset (&full);	2589	sigfillset (&full);
2264	sigprocmask (SIG_SETMASK, &full, &prev);	2590	sigprocmask (SIG_SETMASK, &full, &prev);
2265	#endif	2591	#endif
2266		2592
2267	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);	2593	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2268		2594
2269	#ifndef _WIN32	2595	#ifndef _WIN32
2270	sigprocmask (SIG_SETMASK, &prev, 0);	2596	sigprocmask (SIG_SETMASK, &prev, 0);
2271	#endif	2597	#endif
2272	}	2598	}
…		…
2277	if (!((WL)w)->next)	2603	if (!((WL)w)->next)
2278	{	2604	{
2279	#if _WIN32	2605	#if _WIN32
2280	signal (w->signum, ev_sighandler);	2606	signal (w->signum, ev_sighandler);
2281	#else	2607	#else
2282	struct sigaction sa;	2608	struct sigaction sa = { };
2283	sa.sa_handler = ev_sighandler;	2609	sa.sa_handler = ev_sighandler;
2284	sigfillset (&sa.sa_mask);	2610	sigfillset (&sa.sa_mask);
2285	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2611	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2286	sigaction (w->signum, &sa, 0);	2612	sigaction (w->signum, &sa, 0);
2287	#endif	2613	#endif
…		…
2310		2636
2311	void	2637	void
2312	ev_child_start (EV_P_ ev_child *w)	2638	ev_child_start (EV_P_ ev_child *w)
2313	{	2639	{
2314	#if EV_MULTIPLICITY	2640	#if EV_MULTIPLICITY
2315	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2641	assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2316	#endif	2642	#endif
2317	if (expect_false (ev_is_active (w)))	2643	if (expect_false (ev_is_active (w)))
2318	return;	2644	return;
2319		2645
2320	EV_FREQUENT_CHECK;	2646	EV_FREQUENT_CHECK;
…		…
2345	# ifdef _WIN32	2671	# ifdef _WIN32
2346	# undef lstat	2672	# undef lstat
2347	# define lstat(a,b) _stati64 (a,b)	2673	# define lstat(a,b) _stati64 (a,b)
2348	# endif	2674	# endif
2349		2675
2350	#define DEF_STAT_INTERVAL 5.0074891	2676	#define DEF_STAT_INTERVAL 5.0074891
		2677	#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2351	#define MIN_STAT_INTERVAL 0.1074891	2678	#define MIN_STAT_INTERVAL 0.1074891
2352		2679
2353	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2680	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2354		2681
2355	#if EV_USE_INOTIFY	2682	#if EV_USE_INOTIFY
2356	# define EV_INOTIFY_BUFSIZE 8192	2683	# define EV_INOTIFY_BUFSIZE 8192
…		…
2360	{	2687	{
2361	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);	2688	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);
2362		2689
2363	if (w->wd < 0)	2690	if (w->wd < 0)
2364	{	2691	{
		2692	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2365	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2693	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2366		2694
2367	/* monitor some parent directory for speedup hints */	2695	/* monitor some parent directory for speedup hints */
2368	/* note that exceeding the hardcoded limit is not a correctness issue, */	2696	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2369	/* but an efficiency issue only */	2697	/* but an efficiency issue only */
2370	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2698	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2371	{	2699	{
2372	char path [4096];	2700	char path [4096];
2373	strcpy (path, w->path);	2701	strcpy (path, w->path);
…		…
2377	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF	2705	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2378	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);	2706	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2379		2707
2380	char *pend = strrchr (path, '/');	2708	char *pend = strrchr (path, '/');
2381		2709
2382	if (!pend)	2710	if (!pend || pend == path)
2383	break; /* whoops, no '/', complain to your admin */	2711	break;
2384		2712
2385	*pend = 0;	2713	*pend = 0;
2386	w->wd = inotify_add_watch (fs_fd, path, mask);	2714	w->wd = inotify_add_watch (fs_fd, path, mask);
2387	}	2715	}
2388	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2716	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2389	}	2717	}
2390	}	2718	}
2391	else
2392	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2393		2719
2394	if (w->wd >= 0)	2720	if (w->wd >= 0)
		2721	{
2395	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2722	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2723
		2724	/* now local changes will be tracked by inotify, but remote changes won't */
		2725	/* unless the filesystem it known to be local, we therefore still poll */
		2726	/* also do poll on <2.6.25, but with normal frequency */
		2727	struct statfs sfs;
		2728
		2729	if (fs_2625 && !statfs (w->path, &sfs))
		2730	if (sfs.f_type == 0x1373 /* devfs */
		2731	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2732	|| sfs.f_type == 0x3153464a /* jfs */
		2733	|| sfs.f_type == 0x52654973 /* reiser3 */
		2734	|| sfs.f_type == 0x01021994 /* tempfs */
		2735	|| sfs.f_type == 0x58465342 /* xfs */)
		2736	return;
		2737
		2738	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2739	ev_timer_again (EV_A_ &w->timer);
		2740	}
2396	}	2741	}
2397		2742
2398	static void noinline	2743	static void noinline
2399	infy_del (EV_P_ ev_stat *w)	2744	infy_del (EV_P_ ev_stat *w)
2400	{	2745	{
…		…
2414		2759
2415	static void noinline	2760	static void noinline
2416	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)	2761	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2417	{	2762	{
2418	if (slot < 0)	2763	if (slot < 0)
2419	/* overflow, need to check for all hahs slots */	2764	/* overflow, need to check for all hash slots */
2420	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	2765	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2421	infy_wd (EV_A_ slot, wd, ev);	2766	infy_wd (EV_A_ slot, wd, ev);
2422	else	2767	else
2423	{	2768	{
2424	WL w_;	2769	WL w_;
…		…
2430		2775
2431	if (w->wd == wd || wd == -1)	2776	if (w->wd == wd || wd == -1)
2432	{	2777	{
2433	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))	2778	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2434	{	2779	{
		2780	wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2435	w->wd = -1;	2781	w->wd = -1;
2436	infy_add (EV_A_ w); /* re-add, no matter what */	2782	infy_add (EV_A_ w); /* re-add, no matter what */
2437	}	2783	}
2438		2784
2439	stat_timer_cb (EV_A_ &w->timer, 0);	2785	stat_timer_cb (EV_A_ &w->timer, 0);
…		…
2452		2798
2453	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2799	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2454	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2800	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2455	}	2801	}
2456		2802
2457	void inline_size	2803	inline_size void
		2804	check_2625 (EV_P)
		2805	{
		2806	/* kernels < 2.6.25 are borked
		2807	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		2808	*/
		2809	struct utsname buf;
		2810	int major, minor, micro;
		2811
		2812	if (uname (&buf))
		2813	return;
		2814
		2815	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
		2816	return;
		2817
		2818	if (major < 2
		2819	|| (major == 2 && minor < 6)
		2820	|| (major == 2 && minor == 6 && micro < 25))
		2821	return;
		2822
		2823	fs_2625 = 1;
		2824	}
		2825
		2826	inline_size void
2458	infy_init (EV_P)	2827	infy_init (EV_P)
2459	{	2828	{
2460	if (fs_fd != -2)	2829	if (fs_fd != -2)
2461	return;	2830	return;
		2831
		2832	fs_fd = -1;
		2833
		2834	check_2625 (EV_A);
2462		2835
2463	fs_fd = inotify_init ();	2836	fs_fd = inotify_init ();
2464		2837
2465	if (fs_fd >= 0)	2838	if (fs_fd >= 0)
2466	{	2839	{
…		…
2468	ev_set_priority (&fs_w, EV_MAXPRI);	2841	ev_set_priority (&fs_w, EV_MAXPRI);
2469	ev_io_start (EV_A_ &fs_w);	2842	ev_io_start (EV_A_ &fs_w);
2470	}	2843	}
2471	}	2844	}
2472		2845
2473	void inline_size	2846	inline_size void
2474	infy_fork (EV_P)	2847	infy_fork (EV_P)
2475	{	2848	{
2476	int slot;	2849	int slot;
2477		2850
2478	if (fs_fd < 0)	2851	if (fs_fd < 0)
…		…
2494	w->wd = -1;	2867	w->wd = -1;
2495		2868
2496	if (fs_fd >= 0)	2869	if (fs_fd >= 0)
2497	infy_add (EV_A_ w); /* re-add, no matter what */	2870	infy_add (EV_A_ w); /* re-add, no matter what */
2498	else	2871	else
2499	ev_timer_start (EV_A_ &w->timer);	2872	ev_timer_again (EV_A_ &w->timer);
2500	}	2873	}
2501
2502	}	2874	}
2503	}	2875	}
2504		2876
		2877	#endif
		2878
		2879	#ifdef _WIN32
		2880	# define EV_LSTAT(p,b) _stati64 (p, b)
		2881	#else
		2882	# define EV_LSTAT(p,b) lstat (p, b)
2505	#endif	2883	#endif
2506		2884
2507	void	2885	void
2508	ev_stat_stat (EV_P_ ev_stat *w)	2886	ev_stat_stat (EV_P_ ev_stat *w)
2509	{	2887	{
…		…
2536	|| w->prev.st_atime != w->attr.st_atime	2914	|| w->prev.st_atime != w->attr.st_atime
2537	|| w->prev.st_mtime != w->attr.st_mtime	2915	|| w->prev.st_mtime != w->attr.st_mtime
2538	|| w->prev.st_ctime != w->attr.st_ctime	2916	|| w->prev.st_ctime != w->attr.st_ctime
2539	) {	2917	) {
2540	#if EV_USE_INOTIFY	2918	#if EV_USE_INOTIFY
		2919	if (fs_fd >= 0)
		2920	{
2541	infy_del (EV_A_ w);	2921	infy_del (EV_A_ w);
2542	infy_add (EV_A_ w);	2922	infy_add (EV_A_ w);
2543	ev_stat_stat (EV_A_ w); /* avoid race... */	2923	ev_stat_stat (EV_A_ w); /* avoid race... */
		2924	}
2544	#endif	2925	#endif
2545		2926
2546	ev_feed_event (EV_A_ w, EV_STAT);	2927	ev_feed_event (EV_A_ w, EV_STAT);
2547	}	2928	}
2548	}	2929	}
…		…
2551	ev_stat_start (EV_P_ ev_stat *w)	2932	ev_stat_start (EV_P_ ev_stat *w)
2552	{	2933	{
2553	if (expect_false (ev_is_active (w)))	2934	if (expect_false (ev_is_active (w)))
2554	return;	2935	return;
2555		2936
2556	/* since we use memcmp, we need to clear any padding data etc. */
2557	memset (&w->prev, 0, sizeof (ev_statdata));
2558	memset (&w->attr, 0, sizeof (ev_statdata));
2559
2560	ev_stat_stat (EV_A_ w);	2937	ev_stat_stat (EV_A_ w);
2561		2938
		2939	if (w->interval < MIN_STAT_INTERVAL && w->interval)
2562	if (w->interval < MIN_STAT_INTERVAL)	2940	w->interval = MIN_STAT_INTERVAL;
2563	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2564		2941
2565	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2942	ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2566	ev_set_priority (&w->timer, ev_priority (w));	2943	ev_set_priority (&w->timer, ev_priority (w));
2567		2944
2568	#if EV_USE_INOTIFY	2945	#if EV_USE_INOTIFY
2569	infy_init (EV_A);	2946	infy_init (EV_A);
2570		2947
2571	if (fs_fd >= 0)	2948	if (fs_fd >= 0)
2572	infy_add (EV_A_ w);	2949	infy_add (EV_A_ w);
2573	else	2950	else
2574	#endif	2951	#endif
2575	ev_timer_start (EV_A_ &w->timer);	2952	ev_timer_again (EV_A_ &w->timer);
2576		2953
2577	ev_start (EV_A_ (W)w, 1);	2954	ev_start (EV_A_ (W)w, 1);
2578		2955
2579	EV_FREQUENT_CHECK;	2956	EV_FREQUENT_CHECK;
2580	}	2957	}
…		…
2750	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3127	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2751	}	3128	}
2752	}	3129	}
2753	}	3130	}
2754		3131
		3132	static void
		3133	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		3134	{
		3135	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		3136
		3137	ev_embed_stop (EV_A_ w);
		3138
		3139	{
		3140	struct ev_loop *loop = w->other;
		3141
		3142	ev_loop_fork (EV_A);
		3143	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		3144	}
		3145
		3146	ev_embed_start (EV_A_ w);
		3147	}
		3148
2755	#if 0	3149	#if 0
2756	static void	3150	static void
2757	embed_idle_cb (EV_P_ ev_idle *idle, int revents)	3151	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2758	{	3152	{
2759	ev_idle_stop (EV_A_ idle);	3153	ev_idle_stop (EV_A_ idle);
…		…
2766	if (expect_false (ev_is_active (w)))	3160	if (expect_false (ev_is_active (w)))
2767	return;	3161	return;
2768		3162
2769	{	3163	{
2770	struct ev_loop *loop = w->other;	3164	struct ev_loop *loop = w->other;
2771	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3165	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2772	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3166	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2773	}	3167	}
2774		3168
2775	EV_FREQUENT_CHECK;	3169	EV_FREQUENT_CHECK;
2776		3170
…		…
2779		3173
2780	ev_prepare_init (&w->prepare, embed_prepare_cb);	3174	ev_prepare_init (&w->prepare, embed_prepare_cb);
2781	ev_set_priority (&w->prepare, EV_MINPRI);	3175	ev_set_priority (&w->prepare, EV_MINPRI);
2782	ev_prepare_start (EV_A_ &w->prepare);	3176	ev_prepare_start (EV_A_ &w->prepare);
2783		3177
		3178	ev_fork_init (&w->fork, embed_fork_cb);
		3179	ev_fork_start (EV_A_ &w->fork);
		3180
2784	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/	3181	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2785		3182
2786	ev_start (EV_A_ (W)w, 1);	3183	ev_start (EV_A_ (W)w, 1);
2787		3184
2788	EV_FREQUENT_CHECK;	3185	EV_FREQUENT_CHECK;
…		…
2795	if (expect_false (!ev_is_active (w)))	3192	if (expect_false (!ev_is_active (w)))
2796	return;	3193	return;
2797		3194
2798	EV_FREQUENT_CHECK;	3195	EV_FREQUENT_CHECK;
2799		3196
2800	ev_io_stop (EV_A_ &w->io);	3197	ev_io_stop (EV_A_ &w->io);
2801	ev_prepare_stop (EV_A_ &w->prepare);	3198	ev_prepare_stop (EV_A_ &w->prepare);
2802		3199	ev_fork_stop (EV_A_ &w->fork);
2803	ev_stop (EV_A_ (W)w);
2804		3200
2805	EV_FREQUENT_CHECK;	3201	EV_FREQUENT_CHECK;
2806	}	3202	}
2807	#endif	3203	#endif
2808		3204
…		…
2905	once_cb (EV_P_ struct ev_once *once, int revents)	3301	once_cb (EV_P_ struct ev_once *once, int revents)
2906	{	3302	{
2907	void (*cb)(int revents, void *arg) = once->cb;	3303	void (*cb)(int revents, void *arg) = once->cb;
2908	void *arg = once->arg;	3304	void *arg = once->arg;
2909		3305
2910	ev_io_stop (EV_A_ &once->io);	3306	ev_io_stop (EV_A_ &once->io);
2911	ev_timer_stop (EV_A_ &once->to);	3307	ev_timer_stop (EV_A_ &once->to);
2912	ev_free (once);	3308	ev_free (once);
2913		3309
2914	cb (revents, arg);	3310	cb (revents, arg);
2915	}	3311	}
2916		3312
2917	static void	3313	static void
2918	once_cb_io (EV_P_ ev_io *w, int revents)	3314	once_cb_io (EV_P_ ev_io *w, int revents)
2919	{	3315	{
2920	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3316	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3317
		3318	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2921	}	3319	}
2922		3320
2923	static void	3321	static void
2924	once_cb_to (EV_P_ ev_timer *w, int revents)	3322	once_cb_to (EV_P_ ev_timer *w, int revents)
2925	{	3323	{
2926	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3324	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3325
		3326	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2927	}	3327	}
2928		3328
2929	void	3329	void
2930	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3330	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2931	{	3331	{
…		…
2953	ev_timer_set (&once->to, timeout, 0.);	3353	ev_timer_set (&once->to, timeout, 0.);
2954	ev_timer_start (EV_A_ &once->to);	3354	ev_timer_start (EV_A_ &once->to);
2955	}	3355	}
2956	}	3356	}
2957		3357
		3358	/*****************************************************************************/
		3359
		3360	#if EV_WALK_ENABLE
		3361	void
		3362	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
		3363	{
		3364	int i, j;
		3365	ev_watcher_list *wl, *wn;
		3366
		3367	if (types & (EV_IO | EV_EMBED))
		3368	for (i = 0; i < anfdmax; ++i)
		3369	for (wl = anfds [i].head; wl; )
		3370	{
		3371	wn = wl->next;
		3372
		3373	#if EV_EMBED_ENABLE
		3374	if (ev_cb ((ev_io *)wl) == embed_io_cb)
		3375	{
		3376	if (types & EV_EMBED)
		3377	cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
		3378	}
		3379	else
		3380	#endif
		3381	#if EV_USE_INOTIFY
		3382	if (ev_cb ((ev_io *)wl) == infy_cb)
		3383	;
		3384	else
		3385	#endif
		3386	if ((ev_io *)wl != &pipe_w)
		3387	if (types & EV_IO)
		3388	cb (EV_A_ EV_IO, wl);
		3389
		3390	wl = wn;
		3391	}
		3392
		3393	if (types & (EV_TIMER | EV_STAT))
		3394	for (i = timercnt + HEAP0; i-- > HEAP0; )
		3395	#if EV_STAT_ENABLE
		3396	/*TODO: timer is not always active*/
		3397	if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
		3398	{
		3399	if (types & EV_STAT)
		3400	cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
		3401	}
		3402	else
		3403	#endif
		3404	if (types & EV_TIMER)
		3405	cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
		3406
		3407	#if EV_PERIODIC_ENABLE
		3408	if (types & EV_PERIODIC)
		3409	for (i = periodiccnt + HEAP0; i-- > HEAP0; )
		3410	cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
		3411	#endif
		3412
		3413	#if EV_IDLE_ENABLE
		3414	if (types & EV_IDLE)
		3415	for (j = NUMPRI; i--; )
		3416	for (i = idlecnt [j]; i--; )
		3417	cb (EV_A_ EV_IDLE, idles [j][i]);
		3418	#endif
		3419
		3420	#if EV_FORK_ENABLE
		3421	if (types & EV_FORK)
		3422	for (i = forkcnt; i--; )
		3423	if (ev_cb (forks [i]) != embed_fork_cb)
		3424	cb (EV_A_ EV_FORK, forks [i]);
		3425	#endif
		3426
		3427	#if EV_ASYNC_ENABLE
		3428	if (types & EV_ASYNC)
		3429	for (i = asynccnt; i--; )
		3430	cb (EV_A_ EV_ASYNC, asyncs [i]);
		3431	#endif
		3432
		3433	if (types & EV_PREPARE)
		3434	for (i = preparecnt; i--; )
		3435	#if EV_EMBED_ENABLE
		3436	if (ev_cb (prepares [i]) != embed_prepare_cb)
		3437	#endif
		3438	cb (EV_A_ EV_PREPARE, prepares [i]);
		3439
		3440	if (types & EV_CHECK)
		3441	for (i = checkcnt; i--; )
		3442	cb (EV_A_ EV_CHECK, checks [i]);
		3443
		3444	if (types & EV_SIGNAL)
		3445	for (i = 0; i < signalmax; ++i)
		3446	for (wl = signals [i].head; wl; )
		3447	{
		3448	wn = wl->next;
		3449	cb (EV_A_ EV_SIGNAL, wl);
		3450	wl = wn;
		3451	}
		3452
		3453	if (types & EV_CHILD)
		3454	for (i = EV_PID_HASHSIZE; i--; )
		3455	for (wl = childs [i]; wl; )
		3456	{
		3457	wn = wl->next;
		3458	cb (EV_A_ EV_CHILD, wl);
		3459	wl = wn;
		3460	}
		3461	/* EV_STAT 0x00001000 /* stat data changed */
		3462	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
		3463	}
		3464	#endif
		3465
2958	#if EV_MULTIPLICITY	3466	#if EV_MULTIPLICITY
2959	#include "ev_wrap.h"	3467	#include "ev_wrap.h"
2960	#endif	3468	#endif
2961		3469
2962	#ifdef __cplusplus	3470	#ifdef __cplusplus

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