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Comparing libev/ev.c (file contents):
Revision 1.25 by root, Wed Oct 31 21:34:45 2007 UTC vs.
Revision 1.234 by root, Tue May 6 23:42:16 2008 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
6	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
7	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
8	*	27	*
9	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
10	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
11	*	30	* in which case the provisions of the GPL are applicable instead of
12	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
13	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
14	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
15	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
16	*	35	* and other provisions required by the GPL. If you do not delete the
17	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
18	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
19	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
		45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
		49	# include "config.h"
		50	# endif
		51
		52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
		54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
		57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
		74	# endif
		75
		76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
		82	# endif
		83
		84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
		86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
		90	# endif
		91
		92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
		98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
		132	#endif
29		133
30	#include <math.h>	134	#include <math.h>
31	#include <stdlib.h>	135	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	136	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	137	#include <stddef.h>
36		138
37	#include <stdio.h>	139	#include <stdio.h>
38		140
39	#include <assert.h>	141	#include <assert.h>
40	#include <errno.h>	142	#include <errno.h>
41	#include <sys/types.h>	143	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	144	#include <time.h>
45		145
46	#ifndef HAVE_MONOTONIC	146	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	147
48	# define HAVE_MONOTONIC 1	148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
		154	#ifndef _WIN32
		155	# include <sys/time.h>
		156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
49	# endif	163	# endif
50	#endif	164	#endif
51		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
		167
		168	#ifndef EV_USE_MONOTONIC
		169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
		178	#endif
		179
52	#ifndef HAVE_SELECT	180	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	181	# define EV_USE_SELECT 1
		182	#endif
		183
		184	#ifndef EV_USE_POLL
		185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
54	#endif	189	# endif
		190	#endif
55		191
56	#ifndef HAVE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
57	# define HAVE_EPOLL 0	196	# define EV_USE_EPOLL 0
58	#endif	197	# endif
		198	#endif
59		199
60	#ifndef HAVE_REALTIME	200	#ifndef EV_USE_KQUEUE
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	201	# define EV_USE_KQUEUE 0
		202	#endif
		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
		208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
62	#endif	213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		241
		242	#ifndef CLOCK_MONOTONIC
		243	# undef EV_USE_MONOTONIC
		244	# define EV_USE_MONOTONIC 0
		245	#endif
		246
		247	#ifndef CLOCK_REALTIME
		248	# undef EV_USE_REALTIME
		249	# define EV_USE_REALTIME 0
		250	#endif
		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
		267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
		283	/**/
		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
63		294
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
67		298
68	#include "ev.h"	299	#if __GNUC__ >= 4
		300	# define expect(expr,value) __builtin_expect ((expr),(value))
		301	# define noinline __attribute__ ((noinline))
		302	#else
		303	# define expect(expr,value) (expr)
		304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
		308	#endif
69		309
		310	#define expect_false(expr) expect ((expr) != 0, 0)
		311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
		319
		320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
70	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
73		329
74	static ev_tstamp now, diff; /* monotonic clock */	330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
		336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
		338
		339	#ifdef _WIN32
		340	# include "ev_win32.c"
		341	#endif
		342
		343	/*****************************************************************************/
		344
		345	static void (*syserr_cb)(const char *msg);
		346
		347	void
		348	ev_set_syserr_cb (void (*cb)(const char *msg))
		349	{
		350	syserr_cb = cb;
		351	}
		352
		353	static void noinline
		354	syserr (const char *msg)
		355	{
		356	if (!msg)
		357	msg = "(libev) system error";
		358
		359	if (syserr_cb)
		360	syserr_cb (msg);
		361	else
		362	{
		363	perror (msg);
		364	abort ();
		365	}
		366	}
		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
		383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		384
		385	void
		386	ev_set_allocator (void *(*cb)(void *ptr, long size))
		387	{
		388	alloc = cb;
		389	}
		390
		391	inline_speed void *
		392	ev_realloc (void *ptr, long size)
		393	{
		394	ptr = alloc (ptr, size);
		395
		396	if (!ptr && size)
		397	{
		398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		399	abort ();
		400	}
		401
		402	return ptr;
		403	}
		404
		405	#define ev_malloc(size) ev_realloc (0, (size))
		406	#define ev_free(ptr) ev_realloc ((ptr), 0)
		407
		408	/*****************************************************************************/
		409
		410	typedef struct
		411	{
		412	WL head;
		413	unsigned char events;
		414	unsigned char reify;
		415	#if EV_SELECT_IS_WINSOCKET
		416	SOCKET handle;
		417	#endif
		418	} ANFD;
		419
		420	typedef struct
		421	{
		422	W w;
		423	int events;
		424	} ANPENDING;
		425
		426	#if EV_USE_INOTIFY
		427	typedef struct
		428	{
		429	WL head;
		430	} ANFS;
		431	#endif
		432
		433	#if EV_MULTIPLICITY
		434
		435	struct ev_loop
		436	{
		437	ev_tstamp ev_rt_now;
		438	#define ev_rt_now ((loop)->ev_rt_now)
		439	#define VAR(name,decl) decl;
		440	#include "ev_vars.h"
		441	#undef VAR
		442	};
		443	#include "ev_wrap.h"
		444
		445	static struct ev_loop default_loop_struct;
		446	struct ev_loop *ev_default_loop_ptr;
		447
		448	#else
		449
75	ev_tstamp ev_now;	450	ev_tstamp ev_rt_now;
76	int ev_method;	451	#define VAR(name,decl) static decl;
		452	#include "ev_vars.h"
		453	#undef VAR
77		454
78	static int have_monotonic; /* runtime */	455	static int ev_default_loop_ptr;
79		456
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	457	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		458
84	/*****************************************************************************/	459	/*****************************************************************************/
85		460
86	ev_tstamp	461	ev_tstamp
87	ev_time (void)	462	ev_time (void)
88	{	463	{
89	#if HAVE_REALTIME	464	#if EV_USE_REALTIME
90	struct timespec ts;	465	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	466	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	467	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	468	#else
94	struct timeval tv;	469	struct timeval tv;
95	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	472	#endif
98	}	473	}
99		474
100	static ev_tstamp	475	ev_tstamp inline_size
101	get_clock (void)	476	get_clock (void)
102	{	477	{
103	#if HAVE_MONOTONIC	478	#if EV_USE_MONOTONIC
104	if (have_monotonic)	479	if (expect_true (have_monotonic))
105	{	480	{
106	struct timespec ts;	481	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	482	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	483	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	484	}
110	#endif	485	#endif
111		486
112	return ev_time ();	487	return ev_time ();
113	}	488	}
114		489
115	#define array_needsize(base,cur,cnt,init) \	490	#if EV_MULTIPLICITY
116	if ((cnt) > cur) \	491	ev_tstamp
117	{ \	492	ev_now (EV_P)
118	int newcnt = cur; \	493	{
119	do \	494	return ev_rt_now;
120	{ \	495	}
121	newcnt = (newcnt << 1) | 4 & ~3; \	496	#endif
122	} \	497
123	while ((cnt) > newcnt); \	498	void
124	\	499	ev_sleep (ev_tstamp delay)
125	base = realloc (base, sizeof (*base) * (newcnt)); \	500	{
126	init (base + cur, newcnt - cur); \	501	if (delay > 0.)
127	cur = newcnt; \
128	}	502	{
		503	#if EV_USE_NANOSLEEP
		504	struct timespec ts;
		505
		506	ts.tv_sec = (time_t)delay;
		507	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		508
		509	nanosleep (&ts, 0);
		510	#elif defined(_WIN32)
		511	Sleep ((unsigned long)(delay * 1e3));
		512	#else
		513	struct timeval tv;
		514
		515	tv.tv_sec = (time_t)delay;
		516	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		517
		518	select (0, 0, 0, 0, &tv);
		519	#endif
		520	}
		521	}
129		522
130	/*****************************************************************************/	523	/*****************************************************************************/
131		524
		525	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		526
		527	int inline_size
		528	array_nextsize (int elem, int cur, int cnt)
		529	{
		530	int ncur = cur + 1;
		531
		532	do
		533	ncur <<= 1;
		534	while (cnt > ncur);
		535
		536	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		537	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		538	{
		539	ncur *= elem;
		540	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		541	ncur = ncur - sizeof (void *) * 4;
		542	ncur /= elem;
		543	}
		544
		545	return ncur;
		546	}
		547
		548	static noinline void *
		549	array_realloc (int elem, void *base, int *cur, int cnt)
		550	{
		551	*cur = array_nextsize (elem, *cur, cnt);
		552	return ev_realloc (base, elem * *cur);
		553	}
		554
		555	#define array_needsize(type,base,cur,cnt,init) \
		556	if (expect_false ((cnt) > (cur))) \
		557	{ \
		558	int ocur_ = (cur); \
		559	(base) = (type *)array_realloc \
		560	(sizeof (type), (base), &(cur), (cnt)); \
		561	init ((base) + (ocur_), (cur) - ocur_); \
		562	}
		563
		564	#if 0
		565	#define array_slim(type,stem) \
		566	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		567	{ \
		568	stem ## max = array_roundsize (stem ## cnt >> 1); \
		569	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		570	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		571	}
		572	#endif
		573
		574	#define array_free(stem, idx) \
		575	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		576
		577	/*****************************************************************************/
		578
		579	void noinline
		580	ev_feed_event (EV_P_ void *w, int revents)
		581	{
		582	W w_ = (W)w;
		583	int pri = ABSPRI (w_);
		584
		585	if (expect_false (w_->pending))
		586	pendings [pri][w_->pending - 1].events |= revents;
		587	else
		588	{
		589	w_->pending = ++pendingcnt [pri];
		590	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		591	pendings [pri][w_->pending - 1].w = w_;
		592	pendings [pri][w_->pending - 1].events = revents;
		593	}
		594	}
		595
		596	void inline_speed
		597	queue_events (EV_P_ W *events, int eventcnt, int type)
		598	{
		599	int i;
		600
		601	for (i = 0; i < eventcnt; ++i)
		602	ev_feed_event (EV_A_ events [i], type);
		603	}
		604
		605	/*****************************************************************************/
		606
		607	void inline_size
		608	anfds_init (ANFD *base, int count)
		609	{
		610	while (count--)
		611	{
		612	base->head = 0;
		613	base->events = EV_NONE;
		614	base->reify = 0;
		615
		616	++base;
		617	}
		618	}
		619
		620	void inline_speed
		621	fd_event (EV_P_ int fd, int revents)
		622	{
		623	ANFD *anfd = anfds + fd;
		624	ev_io *w;
		625
		626	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		627	{
		628	int ev = w->events & revents;
		629
		630	if (ev)
		631	ev_feed_event (EV_A_ (W)w, ev);
		632	}
		633	}
		634
		635	void
		636	ev_feed_fd_event (EV_P_ int fd, int revents)
		637	{
		638	if (fd >= 0 && fd < anfdmax)
		639	fd_event (EV_A_ fd, revents);
		640	}
		641
		642	void inline_size
		643	fd_reify (EV_P)
		644	{
		645	int i;
		646
		647	for (i = 0; i < fdchangecnt; ++i)
		648	{
		649	int fd = fdchanges [i];
		650	ANFD *anfd = anfds + fd;
		651	ev_io *w;
		652
		653	unsigned char events = 0;
		654
		655	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		656	events |= (unsigned char)w->events;
		657
		658	#if EV_SELECT_IS_WINSOCKET
		659	if (events)
		660	{
		661	unsigned long argp;
		662	#ifdef EV_FD_TO_WIN32_HANDLE
		663	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		664	#else
		665	anfd->handle = _get_osfhandle (fd);
		666	#endif
		667	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		668	}
		669	#endif
		670
		671	{
		672	unsigned char o_events = anfd->events;
		673	unsigned char o_reify = anfd->reify;
		674
		675	anfd->reify = 0;
		676	anfd->events = events;
		677
		678	if (o_events != events || o_reify & EV_IOFDSET)
		679	backend_modify (EV_A_ fd, o_events, events);
		680	}
		681	}
		682
		683	fdchangecnt = 0;
		684	}
		685
		686	void inline_size
		687	fd_change (EV_P_ int fd, int flags)
		688	{
		689	unsigned char reify = anfds [fd].reify;
		690	anfds [fd].reify |= flags;
		691
		692	if (expect_true (!reify))
		693	{
		694	++fdchangecnt;
		695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		696	fdchanges [fdchangecnt - 1] = fd;
		697	}
		698	}
		699
		700	void inline_speed
		701	fd_kill (EV_P_ int fd)
		702	{
		703	ev_io *w;
		704
		705	while ((w = (ev_io *)anfds [fd].head))
		706	{
		707	ev_io_stop (EV_A_ w);
		708	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		709	}
		710	}
		711
		712	int inline_size
		713	fd_valid (int fd)
		714	{
		715	#ifdef _WIN32
		716	return _get_osfhandle (fd) != -1;
		717	#else
		718	return fcntl (fd, F_GETFD) != -1;
		719	#endif
		720	}
		721
		722	/* called on EBADF to verify fds */
		723	static void noinline
		724	fd_ebadf (EV_P)
		725	{
		726	int fd;
		727
		728	for (fd = 0; fd < anfdmax; ++fd)
		729	if (anfds [fd].events)
		730	if (!fd_valid (fd) == -1 && errno == EBADF)
		731	fd_kill (EV_A_ fd);
		732	}
		733
		734	/* called on ENOMEM in select/poll to kill some fds and retry */
		735	static void noinline
		736	fd_enomem (EV_P)
		737	{
		738	int fd;
		739
		740	for (fd = anfdmax; fd--; )
		741	if (anfds [fd].events)
		742	{
		743	fd_kill (EV_A_ fd);
		744	return;
		745	}
		746	}
		747
		748	/* usually called after fork if backend needs to re-arm all fds from scratch */
		749	static void noinline
		750	fd_rearm_all (EV_P)
		751	{
		752	int fd;
		753
		754	for (fd = 0; fd < anfdmax; ++fd)
		755	if (anfds [fd].events)
		756	{
		757	anfds [fd].events = 0;
		758	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		759	}
		760	}
		761
		762	/*****************************************************************************/
		763
		764	/* towards the root */
		765	void inline_speed
		766	upheap (WT *heap, int k)
		767	{
		768	WT w = heap [k];
		769
		770	for (;;)
		771	{
		772	int p = k >> 1;
		773
		774	/* maybe we could use a dummy element at heap [0]? */
		775	if (!p || heap [p]->at <= w->at)
		776	break;
		777
		778	heap [k] = heap [p];
		779	ev_active (heap [k]) = k;
		780	k = p;
		781	}
		782
		783	heap [k] = w;
		784	ev_active (heap [k]) = k;
		785	}
		786
		787	/* away from the root */
		788	void inline_speed
		789	downheap (WT *heap, int N, int k)
		790	{
		791	WT w = heap [k];
		792
		793	for (;;)
		794	{
		795	int c = k << 1;
		796
		797	if (c > N)
		798	break;
		799
		800	c += c < N && heap [c]->at > heap [c + 1]->at
		801	? 1 : 0;
		802
		803	if (w->at <= heap [c]->at)
		804	break;
		805
		806	heap [k] = heap [c];
		807	ev_active (heap [k]) = k;
		808
		809	k = c;
		810	}
		811
		812	heap [k] = w;
		813	ev_active (heap [k]) = k;
		814	}
		815
		816	void inline_size
		817	adjustheap (WT *heap, int N, int k)
		818	{
		819	upheap (heap, k);
		820	downheap (heap, N, k);
		821	}
		822
		823	/*****************************************************************************/
		824
132	typedef struct	825	typedef struct
133	{	826	{
134	struct ev_io *head;	827	WL head;
135	unsigned char wev, rev; /* want, received event set */	828	EV_ATOMIC_T gotsig;
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void
145	anfds_init (ANFD *base, int count)
146	{
147	while (count--)
148	{
149	base->head = 0;
150	base->wev = base->rev = EV_NONE;
151	++base;
152	}
153	}
154
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void
165	event (W w, int events)
166	{
167	if (w->active)
168	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;
173	}
174	}
175
176	static void
177	fd_event (int fd, int events)
178	{
179	ANFD *anfd = anfds + fd;
180	struct ev_io *w;
181
182	for (w = anfd->head; w; w = w->next)
183	{
184	int ev = w->events & events;
185
186	if (ev)
187	event ((W)w, ev);
188	}
189	}
190
191	static void
192	queue_events (W *events, int eventcnt, int type)
193	{
194	int i;
195
196	for (i = 0; i < eventcnt; ++i)
197	event (events [i], type);
198	}
199
200	/* called on EBADF to verify fds */
201	static void
202	fd_recheck (void)
203	{
204	int fd;
205
206	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	while (anfds [fd].head)
210	{
211	event ((W)anfds [fd].head, EV_ERROR);
212	evio_stop (anfds [fd].head);
213	}
214	}
215
216	/*****************************************************************************/
217
218	static struct ev_timer **timers;
219	static int timermax, timercnt;
220
221	static struct ev_periodic **periodics;
222	static int periodicmax, periodiccnt;
223
224	static void
225	upheap (WT *timers, int k)
226	{
227	WT w = timers [k];
228
229	while (k && timers [k >> 1]->at > w->at)
230	{
231	timers [k] = timers [k >> 1];
232	timers [k]->active = k + 1;
233	k >>= 1;
234	}
235
236	timers [k] = w;
237	timers [k]->active = k + 1;
238
239	}
240
241	static void
242	downheap (WT *timers, int N, int k)
243	{
244	WT w = timers [k];
245
246	while (k < (N >> 1))
247	{
248	int j = k << 1;
249
250	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
251	++j;
252
253	if (w->at <= timers [j]->at)
254	break;
255
256	timers [k] = timers [j];
257	timers [k]->active = k + 1;
258	k = j;
259	}
260
261	timers [k] = w;
262	timers [k]->active = k + 1;
263	}
264
265	/*****************************************************************************/
266
267	typedef struct
268	{
269	struct ev_signal *head;
270	sig_atomic_t gotsig;
271	} ANSIG;	829	} ANSIG;
272		830
273	static ANSIG *signals;	831	static ANSIG *signals;
274	static int signalmax;	832	static int signalmax;
275		833
276	static int sigpipe [2];	834	static EV_ATOMIC_T gotsig;
277	static sig_atomic_t gotsig;
278	static struct ev_io sigev;
279		835
280	static void	836	void inline_size
281	signals_init (ANSIG *base, int count)	837	signals_init (ANSIG *base, int count)
282	{	838	{
283	while (count--)	839	while (count--)
284	{	840	{
285	base->head = 0;	841	base->head = 0;
286	base->gotsig = 0;	842	base->gotsig = 0;
		843
287	++base;	844	++base;
288	}	845	}
289	}	846	}
290		847
		848	/*****************************************************************************/
		849
		850	void inline_speed
		851	fd_intern (int fd)
		852	{
		853	#ifdef _WIN32
		854	int arg = 1;
		855	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		856	#else
		857	fcntl (fd, F_SETFD, FD_CLOEXEC);
		858	fcntl (fd, F_SETFL, O_NONBLOCK);
		859	#endif
		860	}
		861
		862	static void noinline
		863	evpipe_init (EV_P)
		864	{
		865	if (!ev_is_active (&pipeev))
		866	{
		867	#if EV_USE_EVENTFD
		868	if ((evfd = eventfd (0, 0)) >= 0)
		869	{
		870	evpipe [0] = -1;
		871	fd_intern (evfd);
		872	ev_io_set (&pipeev, evfd, EV_READ);
		873	}
		874	else
		875	#endif
		876	{
		877	while (pipe (evpipe))
		878	syserr ("(libev) error creating signal/async pipe");
		879
		880	fd_intern (evpipe [0]);
		881	fd_intern (evpipe [1]);
		882	ev_io_set (&pipeev, evpipe [0], EV_READ);
		883	}
		884
		885	ev_io_start (EV_A_ &pipeev);
		886	ev_unref (EV_A); /* watcher should not keep loop alive */
		887	}
		888	}
		889
		890	void inline_size
		891	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		892	{
		893	if (!*flag)
		894	{
		895	int old_errno = errno; /* save errno because write might clobber it */
		896
		897	*flag = 1;
		898
		899	#if EV_USE_EVENTFD
		900	if (evfd >= 0)
		901	{
		902	uint64_t counter = 1;
		903	write (evfd, &counter, sizeof (uint64_t));
		904	}
		905	else
		906	#endif
		907	write (evpipe [1], &old_errno, 1);
		908
		909	errno = old_errno;
		910	}
		911	}
		912
291	static void	913	static void
		914	pipecb (EV_P_ ev_io *iow, int revents)
		915	{
		916	#if EV_USE_EVENTFD
		917	if (evfd >= 0)
		918	{
		919	uint64_t counter;
		920	read (evfd, &counter, sizeof (uint64_t));
		921	}
		922	else
		923	#endif
		924	{
		925	char dummy;
		926	read (evpipe [0], &dummy, 1);
		927	}
		928
		929	if (gotsig && ev_is_default_loop (EV_A))
		930	{
		931	int signum;
		932	gotsig = 0;
		933
		934	for (signum = signalmax; signum--; )
		935	if (signals [signum].gotsig)
		936	ev_feed_signal_event (EV_A_ signum + 1);
		937	}
		938
		939	#if EV_ASYNC_ENABLE
		940	if (gotasync)
		941	{
		942	int i;
		943	gotasync = 0;
		944
		945	for (i = asynccnt; i--; )
		946	if (asyncs [i]->sent)
		947	{
		948	asyncs [i]->sent = 0;
		949	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		950	}
		951	}
		952	#endif
		953	}
		954
		955	/*****************************************************************************/
		956
		957	static void
292	sighandler (int signum)	958	ev_sighandler (int signum)
293	{	959	{
		960	#if EV_MULTIPLICITY
		961	struct ev_loop *loop = &default_loop_struct;
		962	#endif
		963
		964	#if _WIN32
		965	signal (signum, ev_sighandler);
		966	#endif
		967
294	signals [signum - 1].gotsig = 1;	968	signals [signum - 1].gotsig = 1;
295		969	evpipe_write (EV_A_ &gotsig);
296	if (!gotsig)
297	{
298	gotsig = 1;
299	write (sigpipe [1], &gotsig, 1);
300	}
301	}	970	}
302		971
303	static void	972	void noinline
304	sigcb (struct ev_io *iow, int revents)	973	ev_feed_signal_event (EV_P_ int signum)
305	{	974	{
306	struct ev_signal *w;	975	WL w;
307	int sig;
308		976
309	gotsig = 0;	977	#if EV_MULTIPLICITY
310	read (sigpipe [0], &revents, 1);	978	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		979	#endif
311		980
312	for (sig = signalmax; sig--; )	981	--signum;
313	if (signals [sig].gotsig)	982
314	{	983	if (signum < 0 || signum >= signalmax)
		984	return;
		985
315	signals [sig].gotsig = 0;	986	signals [signum].gotsig = 0;
316		987
317	for (w = signals [sig].head; w; w = w->next)	988	for (w = signals [signum].head; w; w = w->next)
318	event ((W)w, EV_SIGNAL);	989	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
319	}
320	}
321
322	static void
323	siginit (void)
324	{
325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327
328	/* rather than sort out wether we really need nb, set it */
329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
331
332	evio_set (&sigev, sigpipe [0], EV_READ);
333	evio_start (&sigev);
334	}	990	}
335		991
336	/*****************************************************************************/	992	/*****************************************************************************/
337		993
338	static struct ev_idle **idles;	994	static WL childs [EV_PID_HASHSIZE];
339	static int idlemax, idlecnt;
340		995
341	static struct ev_prepare **prepares;	996	#ifndef _WIN32
342	static int preparemax, preparecnt;
343		997
344	static struct ev_check **checks;
345	static int checkmax, checkcnt;
346
347	/*****************************************************************************/
348
349	static struct ev_child *childs [PID_HASHSIZE];
350	static struct ev_signal childev;	998	static ev_signal childev;
		999
		1000	#ifndef WIFCONTINUED
		1001	# define WIFCONTINUED(status) 0
		1002	#endif
		1003
		1004	void inline_speed
		1005	child_reap (EV_P_ int chain, int pid, int status)
		1006	{
		1007	ev_child *w;
		1008	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1009
		1010	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1011	{
		1012	if ((w->pid == pid || !w->pid)
		1013	&& (!traced || (w->flags & 1)))
		1014	{
		1015	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1016	w->rpid = pid;
		1017	w->rstatus = status;
		1018	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1019	}
		1020	}
		1021	}
351		1022
352	#ifndef WCONTINUED	1023	#ifndef WCONTINUED
353	# define WCONTINUED 0	1024	# define WCONTINUED 0
354	#endif	1025	#endif
355		1026
356	static void	1027	static void
357	childcb (struct ev_signal *sw, int revents)	1028	childcb (EV_P_ ev_signal *sw, int revents)
358	{	1029	{
359	struct ev_child *w;
360	int pid, status;	1030	int pid, status;
361		1031
		1032	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
362	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	1033	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	1034	if (!WCONTINUED
364	if (w->pid == pid || w->pid == -1)	1035	|| errno != EINVAL
365	{	1036	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
366	w->status = status;	1037	return;
367	event ((W)w, EV_CHILD);	1038
368	}	1039	/* make sure we are called again until all children have been reaped */
		1040	/* we need to do it this way so that the callback gets called before we continue */
		1041	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1042
		1043	child_reap (EV_A_ pid, pid, status);
		1044	if (EV_PID_HASHSIZE > 1)
		1045	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
369	}	1046	}
		1047
		1048	#endif
370		1049
371	/*****************************************************************************/	1050	/*****************************************************************************/
372		1051
		1052	#if EV_USE_PORT
		1053	# include "ev_port.c"
		1054	#endif
		1055	#if EV_USE_KQUEUE
		1056	# include "ev_kqueue.c"
		1057	#endif
373	#if HAVE_EPOLL	1058	#if EV_USE_EPOLL
374	# include "ev_epoll.c"	1059	# include "ev_epoll.c"
375	#endif	1060	#endif
		1061	#if EV_USE_POLL
		1062	# include "ev_poll.c"
		1063	#endif
376	#if HAVE_SELECT	1064	#if EV_USE_SELECT
377	# include "ev_select.c"	1065	# include "ev_select.c"
378	#endif	1066	#endif
379		1067
380	int	1068	int
381	ev_version_major (void)	1069	ev_version_major (void)
…		…
387	ev_version_minor (void)	1075	ev_version_minor (void)
388	{	1076	{
389	return EV_VERSION_MINOR;	1077	return EV_VERSION_MINOR;
390	}	1078	}
391		1079
392	int ev_init (int flags)	1080	/* return true if we are running with elevated privileges and should ignore env variables */
		1081	int inline_size
		1082	enable_secure (void)
393	{	1083	{
394	if (!ev_method)	1084	#ifdef _WIN32
		1085	return 0;
		1086	#else
		1087	return getuid () != geteuid ()
		1088	|| getgid () != getegid ();
		1089	#endif
		1090	}
		1091
		1092	unsigned int
		1093	ev_supported_backends (void)
		1094	{
		1095	unsigned int flags = 0;
		1096
		1097	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1098	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1099	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1100	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1101	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1102
		1103	return flags;
		1104	}
		1105
		1106	unsigned int
		1107	ev_recommended_backends (void)
		1108	{
		1109	unsigned int flags = ev_supported_backends ();
		1110
		1111	#ifndef __NetBSD__
		1112	/* kqueue is borked on everything but netbsd apparently */
		1113	/* it usually doesn't work correctly on anything but sockets and pipes */
		1114	flags &= ~EVBACKEND_KQUEUE;
		1115	#endif
		1116	#ifdef __APPLE__
		1117	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1118	flags &= ~EVBACKEND_POLL;
		1119	#endif
		1120
		1121	return flags;
		1122	}
		1123
		1124	unsigned int
		1125	ev_embeddable_backends (void)
		1126	{
		1127	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1128
		1129	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1130	/* please fix it and tell me how to detect the fix */
		1131	flags &= ~EVBACKEND_EPOLL;
		1132
		1133	return flags;
		1134	}
		1135
		1136	unsigned int
		1137	ev_backend (EV_P)
		1138	{
		1139	return backend;
		1140	}
		1141
		1142	unsigned int
		1143	ev_loop_count (EV_P)
		1144	{
		1145	return loop_count;
		1146	}
		1147
		1148	void
		1149	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1150	{
		1151	io_blocktime = interval;
		1152	}
		1153
		1154	void
		1155	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1156	{
		1157	timeout_blocktime = interval;
		1158	}
		1159
		1160	static void noinline
		1161	loop_init (EV_P_ unsigned int flags)
		1162	{
		1163	if (!backend)
395	{	1164	{
396	#if HAVE_MONOTONIC	1165	#if EV_USE_MONOTONIC
397	{	1166	{
398	struct timespec ts;	1167	struct timespec ts;
399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1168	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400	have_monotonic = 1;	1169	have_monotonic = 1;
401	}	1170	}
402	#endif	1171	#endif
403		1172
404	ev_now = ev_time ();	1173	ev_rt_now = ev_time ();
405	now = get_clock ();	1174	mn_now = get_clock ();
		1175	now_floor = mn_now;
406	diff = ev_now - now;	1176	rtmn_diff = ev_rt_now - mn_now;
407		1177
408	if (pipe (sigpipe))	1178	io_blocktime = 0.;
409	return 0;	1179	timeout_blocktime = 0.;
		1180	backend = 0;
		1181	backend_fd = -1;
		1182	gotasync = 0;
		1183	#if EV_USE_INOTIFY
		1184	fs_fd = -2;
		1185	#endif
410		1186
411	ev_method = EVMETHOD_NONE;	1187	/* pid check not overridable via env */
		1188	#ifndef _WIN32
		1189	if (flags & EVFLAG_FORKCHECK)
		1190	curpid = getpid ();
		1191	#endif
		1192
		1193	if (!(flags & EVFLAG_NOENV)
		1194	&& !enable_secure ()
		1195	&& getenv ("LIBEV_FLAGS"))
		1196	flags = atoi (getenv ("LIBEV_FLAGS"));
		1197
		1198	if (!(flags & 0x0000ffffU))
		1199	flags |= ev_recommended_backends ();
		1200
		1201	#if EV_USE_PORT
		1202	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1203	#endif
		1204	#if EV_USE_KQUEUE
		1205	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1206	#endif
412	#if HAVE_EPOLL	1207	#if EV_USE_EPOLL
413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	1208	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
414	#endif	1209	#endif
		1210	#if EV_USE_POLL
		1211	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1212	#endif
415	#if HAVE_SELECT	1213	#if EV_USE_SELECT
416	if (ev_method == EVMETHOD_NONE) select_init (flags);	1214	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
417	#endif	1215	#endif
418		1216
419	if (ev_method)	1217	ev_init (&pipeev, pipecb);
		1218	ev_set_priority (&pipeev, EV_MAXPRI);
		1219	}
		1220	}
		1221
		1222	static void noinline
		1223	loop_destroy (EV_P)
		1224	{
		1225	int i;
		1226
		1227	if (ev_is_active (&pipeev))
		1228	{
		1229	ev_ref (EV_A); /* signal watcher */
		1230	ev_io_stop (EV_A_ &pipeev);
		1231
		1232	#if EV_USE_EVENTFD
		1233	if (evfd >= 0)
		1234	close (evfd);
		1235	#endif
		1236
		1237	if (evpipe [0] >= 0)
420	{	1238	{
421	evw_init (&sigev, sigcb);	1239	close (evpipe [0]);
422	siginit ();	1240	close (evpipe [1]);
423
424	evsignal_init (&childev, childcb, SIGCHLD);
425	evsignal_start (&childev);
426	}	1241	}
427	}	1242	}
428		1243
429	return ev_method;	1244	#if EV_USE_INOTIFY
		1245	if (fs_fd >= 0)
		1246	close (fs_fd);
		1247	#endif
		1248
		1249	if (backend_fd >= 0)
		1250	close (backend_fd);
		1251
		1252	#if EV_USE_PORT
		1253	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1254	#endif
		1255	#if EV_USE_KQUEUE
		1256	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1257	#endif
		1258	#if EV_USE_EPOLL
		1259	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1260	#endif
		1261	#if EV_USE_POLL
		1262	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1263	#endif
		1264	#if EV_USE_SELECT
		1265	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1266	#endif
		1267
		1268	for (i = NUMPRI; i--; )
		1269	{
		1270	array_free (pending, [i]);
		1271	#if EV_IDLE_ENABLE
		1272	array_free (idle, [i]);
		1273	#endif
		1274	}
		1275
		1276	ev_free (anfds); anfdmax = 0;
		1277
		1278	/* have to use the microsoft-never-gets-it-right macro */
		1279	array_free (fdchange, EMPTY);
		1280	array_free (timer, EMPTY);
		1281	#if EV_PERIODIC_ENABLE
		1282	array_free (periodic, EMPTY);
		1283	#endif
		1284	#if EV_FORK_ENABLE
		1285	array_free (fork, EMPTY);
		1286	#endif
		1287	array_free (prepare, EMPTY);
		1288	array_free (check, EMPTY);
		1289	#if EV_ASYNC_ENABLE
		1290	array_free (async, EMPTY);
		1291	#endif
		1292
		1293	backend = 0;
		1294	}
		1295
		1296	#if EV_USE_INOTIFY
		1297	void inline_size infy_fork (EV_P);
		1298	#endif
		1299
		1300	void inline_size
		1301	loop_fork (EV_P)
		1302	{
		1303	#if EV_USE_PORT
		1304	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1305	#endif
		1306	#if EV_USE_KQUEUE
		1307	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1308	#endif
		1309	#if EV_USE_EPOLL
		1310	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1311	#endif
		1312	#if EV_USE_INOTIFY
		1313	infy_fork (EV_A);
		1314	#endif
		1315
		1316	if (ev_is_active (&pipeev))
		1317	{
		1318	/* this "locks" the handlers against writing to the pipe */
		1319	/* while we modify the fd vars */
		1320	gotsig = 1;
		1321	#if EV_ASYNC_ENABLE
		1322	gotasync = 1;
		1323	#endif
		1324
		1325	ev_ref (EV_A);
		1326	ev_io_stop (EV_A_ &pipeev);
		1327
		1328	#if EV_USE_EVENTFD
		1329	if (evfd >= 0)
		1330	close (evfd);
		1331	#endif
		1332
		1333	if (evpipe [0] >= 0)
		1334	{
		1335	close (evpipe [0]);
		1336	close (evpipe [1]);
		1337	}
		1338
		1339	evpipe_init (EV_A);
		1340	/* now iterate over everything, in case we missed something */
		1341	pipecb (EV_A_ &pipeev, EV_READ);
		1342	}
		1343
		1344	postfork = 0;
		1345	}
		1346
		1347	#if EV_MULTIPLICITY
		1348	struct ev_loop *
		1349	ev_loop_new (unsigned int flags)
		1350	{
		1351	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1352
		1353	memset (loop, 0, sizeof (struct ev_loop));
		1354
		1355	loop_init (EV_A_ flags);
		1356
		1357	if (ev_backend (EV_A))
		1358	return loop;
		1359
		1360	return 0;
		1361	}
		1362
		1363	void
		1364	ev_loop_destroy (EV_P)
		1365	{
		1366	loop_destroy (EV_A);
		1367	ev_free (loop);
		1368	}
		1369
		1370	void
		1371	ev_loop_fork (EV_P)
		1372	{
		1373	postfork = 1; /* must be in line with ev_default_fork */
		1374	}
		1375	#endif
		1376
		1377	#if EV_MULTIPLICITY
		1378	struct ev_loop *
		1379	ev_default_loop_init (unsigned int flags)
		1380	#else
		1381	int
		1382	ev_default_loop (unsigned int flags)
		1383	#endif
		1384	{
		1385	if (!ev_default_loop_ptr)
		1386	{
		1387	#if EV_MULTIPLICITY
		1388	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1389	#else
		1390	ev_default_loop_ptr = 1;
		1391	#endif
		1392
		1393	loop_init (EV_A_ flags);
		1394
		1395	if (ev_backend (EV_A))
		1396	{
		1397	#ifndef _WIN32
		1398	ev_signal_init (&childev, childcb, SIGCHLD);
		1399	ev_set_priority (&childev, EV_MAXPRI);
		1400	ev_signal_start (EV_A_ &childev);
		1401	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1402	#endif
		1403	}
		1404	else
		1405	ev_default_loop_ptr = 0;
		1406	}
		1407
		1408	return ev_default_loop_ptr;
		1409	}
		1410
		1411	void
		1412	ev_default_destroy (void)
		1413	{
		1414	#if EV_MULTIPLICITY
		1415	struct ev_loop *loop = ev_default_loop_ptr;
		1416	#endif
		1417
		1418	#ifndef _WIN32
		1419	ev_ref (EV_A); /* child watcher */
		1420	ev_signal_stop (EV_A_ &childev);
		1421	#endif
		1422
		1423	loop_destroy (EV_A);
		1424	}
		1425
		1426	void
		1427	ev_default_fork (void)
		1428	{
		1429	#if EV_MULTIPLICITY
		1430	struct ev_loop *loop = ev_default_loop_ptr;
		1431	#endif
		1432
		1433	if (backend)
		1434	postfork = 1; /* must be in line with ev_loop_fork */
430	}	1435	}
431		1436
432	/*****************************************************************************/	1437	/*****************************************************************************/
433		1438
434	void	1439	void
435	ev_prefork (void)	1440	ev_invoke (EV_P_ void *w, int revents)
436	{	1441	{
437	/* nop */	1442	EV_CB_INVOKE ((W)w, revents);
438	}	1443	}
439		1444
440	void	1445	void inline_speed
441	ev_postfork_parent (void)	1446	call_pending (EV_P)
442	{	1447	{
443	/* nop */
444	}
445
446	void
447	ev_postfork_child (void)
448	{
449	#if HAVE_EPOLL
450	if (ev_method == EVMETHOD_EPOLL)
451	epoll_postfork_child ();
452	#endif
453
454	evio_stop (&sigev);
455	close (sigpipe [0]);
456	close (sigpipe [1]);
457	pipe (sigpipe);
458	siginit ();
459	}
460
461	/*****************************************************************************/
462
463	static void
464	fd_reify (void)
465	{
466	int i;	1448	int pri;
467		1449
468	for (i = 0; i < fdchangecnt; ++i)	1450	for (pri = NUMPRI; pri--; )
		1451	while (pendingcnt [pri])
469	{	1452	{
470	int fd = fdchanges [i];	1453	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
471	ANFD *anfd = anfds + fd;
472	struct ev_io *w;
473		1454
474	int wev = 0;	1455	if (expect_true (p->w))
		1456	{
		1457	/*assert (("non-pending watcher on pending list", p->w->pending));*/
475		1458
476	for (w = anfd->head; w; w = w->next)	1459	p->w->pending = 0;
477	wev |= w->events;	1460	EV_CB_INVOKE (p->w, p->events);
		1461	}
		1462	}
		1463	}
478		1464
479	if (anfd->wev != wev)	1465	#if EV_IDLE_ENABLE
		1466	void inline_size
		1467	idle_reify (EV_P)
		1468	{
		1469	if (expect_false (idleall))
		1470	{
		1471	int pri;
		1472
		1473	for (pri = NUMPRI; pri--; )
480	{	1474	{
481	method_modify (fd, anfd->wev, wev);	1475	if (pendingcnt [pri])
482	anfd->wev = wev;	1476	break;
		1477
		1478	if (idlecnt [pri])
		1479	{
		1480	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1481	break;
		1482	}
483	}	1483	}
484	}	1484	}
485
486	fdchangecnt = 0;
487	}	1485	}
		1486	#endif
488		1487
489	static void	1488	void inline_size
490	call_pending (void)
491	{
492	while (pendingcnt)
493	{
494	ANPENDING *p = pendings + --pendingcnt;
495
496	if (p->w)
497	{
498	p->w->pending = 0;
499	p->w->cb (p->w, p->events);
500	}
501	}
502	}
503
504	static void
505	timers_reify (void)	1489	timers_reify (EV_P)
506	{	1490	{
507	while (timercnt && timers [0]->at <= now)	1491	while (timercnt && ev_at (timers [1]) <= mn_now)
508	{	1492	{
509	struct ev_timer *w = timers [0];	1493	ev_timer *w = (ev_timer *)timers [1];
510		1494
511	event ((W)w, EV_TIMEOUT);	1495	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
512		1496
513	/* first reschedule or stop timer */	1497	/* first reschedule or stop timer */
514	if (w->repeat)	1498	if (w->repeat)
515	{	1499	{
516	w->at = now + w->repeat;	1500	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
517	assert (("timer timeout in the past, negative repeat?", w->at > now));	1501
		1502	ev_at (w) += w->repeat;
		1503	if (ev_at (w) < mn_now)
		1504	ev_at (w) = mn_now;
		1505
518	downheap ((WT *)timers, timercnt, 0);	1506	downheap (timers, timercnt, 1);
519	}	1507	}
520	else	1508	else
521	evtimer_stop (w); /* nonrepeating: stop timer */	1509	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522	}
523	}
524		1510
525	static void	1511	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1512	}
		1513	}
		1514
		1515	#if EV_PERIODIC_ENABLE
		1516	void inline_size
526	periodics_reify (void)	1517	periodics_reify (EV_P)
527	{	1518	{
528	while (periodiccnt && periodics [0]->at <= ev_now)	1519	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
529	{	1520	{
530	struct ev_periodic *w = periodics [0];	1521	ev_periodic *w = (ev_periodic *)periodics [1];
		1522
		1523	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
531		1524
532	/* first reschedule or stop timer */	1525	/* first reschedule or stop timer */
533	if (w->interval)	1526	if (w->reschedule_cb)
534	{	1527	{
535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1528	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1529	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
537	downheap ((WT *)periodics, periodiccnt, 0);	1530	downheap (periodics, periodiccnt, 1);
		1531	}
		1532	else if (w->interval)
		1533	{
		1534	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1535	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1536	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1537	downheap (periodics, periodiccnt, 1);
538	}	1538	}
539	else	1539	else
540	evperiodic_stop (w); /* nonrepeating: stop timer */	1540	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541		1541
542	event ((W)w, EV_TIMEOUT);	1542	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
543	}	1543	}
544	}	1544	}
545		1545
546	static void	1546	static void noinline
547	periodics_reschedule (ev_tstamp diff)	1547	periodics_reschedule (EV_P)
548	{	1548	{
549	int i;	1549	int i;
550		1550
551	/* adjust periodics after time jump */	1551	/* adjust periodics after time jump */
552	for (i = 0; i < periodiccnt; ++i)	1552	for (i = 1; i <= periodiccnt; ++i)
553	{	1553	{
554	struct ev_periodic *w = periodics [i];	1554	ev_periodic *w = (ev_periodic *)periodics [i];
555		1555
		1556	if (w->reschedule_cb)
		1557	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
556	if (w->interval)	1558	else if (w->interval)
		1559	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1560	}
		1561
		1562	/* now rebuild the heap */
		1563	for (i = periodiccnt >> 1; i--; )
		1564	downheap (periodics, periodiccnt, i);
		1565	}
		1566	#endif
		1567
		1568	void inline_speed
		1569	time_update (EV_P_ ev_tstamp max_block)
		1570	{
		1571	int i;
		1572
		1573	#if EV_USE_MONOTONIC
		1574	if (expect_true (have_monotonic))
		1575	{
		1576	ev_tstamp odiff = rtmn_diff;
		1577
		1578	mn_now = get_clock ();
		1579
		1580	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1581	/* interpolate in the meantime */
		1582	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
557	{	1583	{
558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1584	ev_rt_now = rtmn_diff + mn_now;
559		1585	return;
560	if (fabs (diff) >= 1e-4)
561	{
562	evperiodic_stop (w);
563	evperiodic_start (w);
564
565	i = 0; /* restart loop, inefficient, but time jumps should be rare */
566	}
567	}	1586	}
568	}
569	}
570		1587
571	static void	1588	now_floor = mn_now;
572	time_update (void)
573	{
574	int i;
575
576	ev_now = ev_time ();	1589	ev_rt_now = ev_time ();
577		1590
578	if (have_monotonic)
579	{
580	ev_tstamp odiff = diff;
581
582	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1591	/* loop a few times, before making important decisions.
		1592	* on the choice of "4": one iteration isn't enough,
		1593	* in case we get preempted during the calls to
		1594	* ev_time and get_clock. a second call is almost guaranteed
		1595	* to succeed in that case, though. and looping a few more times
		1596	* doesn't hurt either as we only do this on time-jumps or
		1597	* in the unlikely event of having been preempted here.
		1598	*/
		1599	for (i = 4; --i; )
583	{	1600	{
584	now = get_clock ();
585	diff = ev_now - now;	1601	rtmn_diff = ev_rt_now - mn_now;
586		1602
587	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1603	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
588	return; /* all is well */	1604	return; /* all is well */
589		1605
590	ev_now = ev_time ();	1606	ev_rt_now = ev_time ();
		1607	mn_now = get_clock ();
		1608	now_floor = mn_now;
591	}	1609	}
592		1610
		1611	# if EV_PERIODIC_ENABLE
593	periodics_reschedule (diff - odiff);	1612	periodics_reschedule (EV_A);
		1613	# endif
594	/* no timer adjustment, as the monotonic clock doesn't jump */	1614	/* no timer adjustment, as the monotonic clock doesn't jump */
		1615	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
595	}	1616	}
596	else	1617	else
		1618	#endif
597	{	1619	{
598	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1620	ev_rt_now = ev_time ();
		1621
		1622	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
599	{	1623	{
		1624	#if EV_PERIODIC_ENABLE
600	periodics_reschedule (ev_now - now);	1625	periodics_reschedule (EV_A);
601		1626	#endif
602	/* adjust timers. this is easy, as the offset is the same for all */	1627	/* adjust timers. this is easy, as the offset is the same for all of them */
603	for (i = 0; i < timercnt; ++i)	1628	for (i = 1; i <= timercnt; ++i)
604	timers [i]->at += diff;	1629	ev_at (timers [i]) += ev_rt_now - mn_now;
605	}	1630	}
606		1631
607	now = ev_now;	1632	mn_now = ev_rt_now;
608	}	1633	}
609	}	1634	}
610		1635
611	int ev_loop_done;	1636	void
		1637	ev_ref (EV_P)
		1638	{
		1639	++activecnt;
		1640	}
612		1641
		1642	void
		1643	ev_unref (EV_P)
		1644	{
		1645	--activecnt;
		1646	}
		1647
		1648	static int loop_done;
		1649
		1650	void
613	void ev_loop (int flags)	1651	ev_loop (EV_P_ int flags)
614	{	1652	{
615	double block;	1653	loop_done = EVUNLOOP_CANCEL;
616	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1654
		1655	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
617		1656
618	do	1657	do
619	{	1658	{
		1659	#ifndef _WIN32
		1660	if (expect_false (curpid)) /* penalise the forking check even more */
		1661	if (expect_false (getpid () != curpid))
		1662	{
		1663	curpid = getpid ();
		1664	postfork = 1;
		1665	}
		1666	#endif
		1667
		1668	#if EV_FORK_ENABLE
		1669	/* we might have forked, so queue fork handlers */
		1670	if (expect_false (postfork))
		1671	if (forkcnt)
		1672	{
		1673	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1674	call_pending (EV_A);
		1675	}
		1676	#endif
		1677
620	/* queue check watchers (and execute them) */	1678	/* queue prepare watchers (and execute them) */
621	if (preparecnt)	1679	if (expect_false (preparecnt))
622	{	1680	{
623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1681	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624	call_pending ();	1682	call_pending (EV_A);
625	}	1683	}
626		1684
		1685	if (expect_false (!activecnt))
		1686	break;
		1687
		1688	/* we might have forked, so reify kernel state if necessary */
		1689	if (expect_false (postfork))
		1690	loop_fork (EV_A);
		1691
627	/* update fd-related kernel structures */	1692	/* update fd-related kernel structures */
628	fd_reify ();	1693	fd_reify (EV_A);
629		1694
630	/* calculate blocking time */	1695	/* calculate blocking time */
		1696	{
		1697	ev_tstamp waittime = 0.;
		1698	ev_tstamp sleeptime = 0.;
631		1699
632	/* we only need this for !monotonic clockor timers, but as we basically	1700	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
633	always have timers, we just calculate it always */
634	ev_now = ev_time ();
635
636	if (flags & EVLOOP_NONBLOCK || idlecnt)
637	block = 0.;
638	else
639	{	1701	{
		1702	/* update time to cancel out callback processing overhead */
		1703	time_update (EV_A_ 1e100);
		1704
640	block = MAX_BLOCKTIME;	1705	waittime = MAX_BLOCKTIME;
641		1706
642	if (timercnt)	1707	if (timercnt)
643	{	1708	{
644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1709	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
645	if (block > to) block = to;	1710	if (waittime > to) waittime = to;
646	}	1711	}
647		1712
		1713	#if EV_PERIODIC_ENABLE
648	if (periodiccnt)	1714	if (periodiccnt)
649	{	1715	{
650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1716	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
651	if (block > to) block = to;	1717	if (waittime > to) waittime = to;
652	}	1718	}
		1719	#endif
653		1720
654	if (block < 0.) block = 0.;	1721	if (expect_false (waittime < timeout_blocktime))
		1722	waittime = timeout_blocktime;
		1723
		1724	sleeptime = waittime - backend_fudge;
		1725
		1726	if (expect_true (sleeptime > io_blocktime))
		1727	sleeptime = io_blocktime;
		1728
		1729	if (sleeptime)
		1730	{
		1731	ev_sleep (sleeptime);
		1732	waittime -= sleeptime;
		1733	}
655	}	1734	}
656		1735
657	method_poll (block);	1736	++loop_count;
		1737	backend_poll (EV_A_ waittime);
658		1738
659	/* update ev_now, do magic */	1739	/* update ev_rt_now, do magic */
660	time_update ();	1740	time_update (EV_A_ waittime + sleeptime);
		1741	}
661		1742
662	/* queue pending timers and reschedule them */	1743	/* queue pending timers and reschedule them */
663	timers_reify (); /* relative timers called last */	1744	timers_reify (EV_A); /* relative timers called last */
		1745	#if EV_PERIODIC_ENABLE
664	periodics_reify (); /* absolute timers called first */	1746	periodics_reify (EV_A); /* absolute timers called first */
		1747	#endif
665		1748
		1749	#if EV_IDLE_ENABLE
666	/* queue idle watchers unless io or timers are pending */	1750	/* queue idle watchers unless other events are pending */
667	if (!pendingcnt)	1751	idle_reify (EV_A);
668	queue_events ((W *)idles, idlecnt, EV_IDLE);	1752	#endif
669		1753
670	/* queue check watchers, to be executed first */	1754	/* queue check watchers, to be executed first */
671	if (checkcnt)	1755	if (expect_false (checkcnt))
672	queue_events ((W *)checks, checkcnt, EV_CHECK);	1756	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673		1757
674	call_pending ();	1758	call_pending (EV_A);
675	}	1759	}
676	while (!ev_loop_done);	1760	while (expect_true (
		1761	activecnt
		1762	&& !loop_done
		1763	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1764	));
677		1765
678	if (ev_loop_done != 2)	1766	if (loop_done == EVUNLOOP_ONE)
		1767	loop_done = EVUNLOOP_CANCEL;
		1768	}
		1769
		1770	void
		1771	ev_unloop (EV_P_ int how)
		1772	{
679	ev_loop_done = 0;	1773	loop_done = how;
680	}	1774	}
681		1775
682	/*****************************************************************************/	1776	/*****************************************************************************/
683		1777
684	static void	1778	void inline_size
685	wlist_add (WL *head, WL elem)	1779	wlist_add (WL *head, WL elem)
686	{	1780	{
687	elem->next = *head;	1781	elem->next = *head;
688	*head = elem;	1782	*head = elem;
689	}	1783	}
690		1784
691	static void	1785	void inline_size
692	wlist_del (WL *head, WL elem)	1786	wlist_del (WL *head, WL elem)
693	{	1787	{
694	while (*head)	1788	while (*head)
695	{	1789	{
696	if (*head == elem)	1790	if (*head == elem)
…		…
701		1795
702	head = &(*head)->next;	1796	head = &(*head)->next;
703	}	1797	}
704	}	1798	}
705		1799
706	static void	1800	void inline_speed
707	ev_clear (W w)	1801	clear_pending (EV_P_ W w)
708	{	1802	{
709	if (w->pending)	1803	if (w->pending)
710	{	1804	{
711	pendings [w->pending - 1].w = 0;	1805	pendings [ABSPRI (w)][w->pending - 1].w = 0;
712	w->pending = 0;	1806	w->pending = 0;
713	}	1807	}
714	}	1808	}
715		1809
716	static void	1810	int
		1811	ev_clear_pending (EV_P_ void *w)
		1812	{
		1813	W w_ = (W)w;
		1814	int pending = w_->pending;
		1815
		1816	if (expect_true (pending))
		1817	{
		1818	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1819	w_->pending = 0;
		1820	p->w = 0;
		1821	return p->events;
		1822	}
		1823	else
		1824	return 0;
		1825	}
		1826
		1827	void inline_size
		1828	pri_adjust (EV_P_ W w)
		1829	{
		1830	int pri = w->priority;
		1831	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1832	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1833	w->priority = pri;
		1834	}
		1835
		1836	void inline_speed
717	ev_start (W w, int active)	1837	ev_start (EV_P_ W w, int active)
718	{	1838	{
		1839	pri_adjust (EV_A_ w);
719	w->active = active;	1840	w->active = active;
		1841	ev_ref (EV_A);
720	}	1842	}
721		1843
722	static void	1844	void inline_size
723	ev_stop (W w)	1845	ev_stop (EV_P_ W w)
724	{	1846	{
		1847	ev_unref (EV_A);
725	w->active = 0;	1848	w->active = 0;
726	}	1849	}
727		1850
728	/*****************************************************************************/	1851	/*****************************************************************************/
729		1852
730	void	1853	void noinline
731	evio_start (struct ev_io *w)	1854	ev_io_start (EV_P_ ev_io *w)
732	{	1855	{
733	if (ev_is_active (w))
734	return;
735
736	int fd = w->fd;	1856	int fd = w->fd;
737		1857
		1858	if (expect_false (ev_is_active (w)))
		1859	return;
		1860
		1861	assert (("ev_io_start called with negative fd", fd >= 0));
		1862
738	ev_start ((W)w, 1);	1863	ev_start (EV_A_ (W)w, 1);
739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1864	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
740	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1865	wlist_add (&anfds[fd].head, (WL)w);
741		1866
742	++fdchangecnt;	1867	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1868	w->events &= ~EV_IOFDSET;
744	fdchanges [fdchangecnt - 1] = fd;
745
746	if (w->fd == 9)
747	printf ("start %p:%x\n", w, w->events);//D
748	}	1869	}
749		1870
750	void	1871	void noinline
751	evio_stop (struct ev_io *w)	1872	ev_io_stop (EV_P_ ev_io *w)
752	{	1873	{
753	if (w->fd == 9)	1874	clear_pending (EV_A_ (W)w);
754	printf ("stop %p:%x\n", w, w->events);//D
755	ev_clear ((W)w);
756	if (!ev_is_active (w))	1875	if (expect_false (!ev_is_active (w)))
757	return;	1876	return;
758		1877
		1878	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1879
759	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1880	wlist_del (&anfds[w->fd].head, (WL)w);
760	ev_stop ((W)w);	1881	ev_stop (EV_A_ (W)w);
761		1882
762	++fdchangecnt;	1883	fd_change (EV_A_ w->fd, 1);
763	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
764	fdchanges [fdchangecnt - 1] = w->fd;
765	}	1884	}
766		1885
767	void	1886	void noinline
768	evtimer_start (struct ev_timer *w)	1887	ev_timer_start (EV_P_ ev_timer *w)
769	{	1888	{
770	if (ev_is_active (w))	1889	if (expect_false (ev_is_active (w)))
771	return;	1890	return;
772		1891
773	w->at += now;	1892	ev_at (w) += mn_now;
774		1893
775	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1894	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
776		1895
777	ev_start ((W)w, ++timercnt);	1896	ev_start (EV_A_ (W)w, ++timercnt);
778	array_needsize (timers, timermax, timercnt, );	1897	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
779	timers [timercnt - 1] = w;	1898	timers [timercnt] = (WT)w;
780	upheap ((WT *)timers, timercnt - 1);	1899	upheap (timers, timercnt);
781	}
782		1900
783	void	1901	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		1902	}
		1903
		1904	void noinline
784	evtimer_stop (struct ev_timer *w)	1905	ev_timer_stop (EV_P_ ev_timer *w)
785	{	1906	{
786	ev_clear ((W)w);	1907	clear_pending (EV_A_ (W)w);
787	if (!ev_is_active (w))	1908	if (expect_false (!ev_is_active (w)))
788	return;	1909	return;
789		1910
790	if (w->active < timercnt--)	1911	{
		1912	int active = ev_active (w);
		1913
		1914	assert (("internal timer heap corruption", timers [active] == (WT)w));
		1915
		1916	if (expect_true (active < timercnt))
791	{	1917	{
792	timers [w->active - 1] = timers [timercnt];	1918	timers [active] = timers [timercnt];
793	downheap ((WT *)timers, timercnt, w->active - 1);	1919	adjustheap (timers, timercnt, active);
794	}	1920	}
795		1921
796	w->at = w->repeat;	1922	--timercnt;
		1923	}
797		1924
		1925	ev_at (w) -= mn_now;
		1926
798	ev_stop ((W)w);	1927	ev_stop (EV_A_ (W)w);
799	}	1928	}
800		1929
801	void	1930	void noinline
802	evtimer_again (struct ev_timer *w)	1931	ev_timer_again (EV_P_ ev_timer *w)
803	{	1932	{
804	if (ev_is_active (w))	1933	if (ev_is_active (w))
805	{	1934	{
806	if (w->repeat)	1935	if (w->repeat)
807	{	1936	{
808	w->at = now + w->repeat;	1937	ev_at (w) = mn_now + w->repeat;
809	downheap ((WT *)timers, timercnt, w->active - 1);	1938	adjustheap (timers, timercnt, ev_active (w));
810	}	1939	}
811	else	1940	else
812	evtimer_stop (w);	1941	ev_timer_stop (EV_A_ w);
813	}	1942	}
814	else if (w->repeat)	1943	else if (w->repeat)
		1944	{
		1945	ev_at (w) = w->repeat;
815	evtimer_start (w);	1946	ev_timer_start (EV_A_ w);
		1947	}
816	}	1948	}
817		1949
818	void	1950	#if EV_PERIODIC_ENABLE
		1951	void noinline
819	evperiodic_start (struct ev_periodic *w)	1952	ev_periodic_start (EV_P_ ev_periodic *w)
820	{	1953	{
821	if (ev_is_active (w))	1954	if (expect_false (ev_is_active (w)))
822	return;	1955	return;
823		1956
824	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1957	if (w->reschedule_cb)
825		1958	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1959	else if (w->interval)
		1960	{
		1961	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
826	/* this formula differs from the one in periodic_reify because we do not always round up */	1962	/* this formula differs from the one in periodic_reify because we do not always round up */
827	if (w->interval)
828	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1963	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1964	}
		1965	else
		1966	ev_at (w) = w->offset;
829		1967
830	ev_start ((W)w, ++periodiccnt);	1968	ev_start (EV_A_ (W)w, ++periodiccnt);
831	array_needsize (periodics, periodicmax, periodiccnt, );	1969	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
832	periodics [periodiccnt - 1] = w;	1970	periodics [periodiccnt] = (WT)w;
833	upheap ((WT *)periodics, periodiccnt - 1);	1971	upheap (periodics, periodiccnt);
834	}
835		1972
836	void	1973	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
		1974	}
		1975
		1976	void noinline
837	evperiodic_stop (struct ev_periodic *w)	1977	ev_periodic_stop (EV_P_ ev_periodic *w)
838	{	1978	{
839	ev_clear ((W)w);	1979	clear_pending (EV_A_ (W)w);
840	if (!ev_is_active (w))	1980	if (expect_false (!ev_is_active (w)))
841	return;	1981	return;
842		1982
843	if (w->active < periodiccnt--)	1983	{
		1984	int active = ev_active (w);
		1985
		1986	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		1987
		1988	if (expect_true (active < periodiccnt))
844	{	1989	{
845	periodics [w->active - 1] = periodics [periodiccnt];	1990	periodics [active] = periodics [periodiccnt];
846	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1991	adjustheap (periodics, periodiccnt, active);
847	}	1992	}
848		1993
		1994	--periodiccnt;
		1995	}
		1996
849	ev_stop ((W)w);	1997	ev_stop (EV_A_ (W)w);
850	}	1998	}
851		1999
852	void	2000	void noinline
		2001	ev_periodic_again (EV_P_ ev_periodic *w)
		2002	{
		2003	/* TODO: use adjustheap and recalculation */
		2004	ev_periodic_stop (EV_A_ w);
		2005	ev_periodic_start (EV_A_ w);
		2006	}
		2007	#endif
		2008
		2009	#ifndef SA_RESTART
		2010	# define SA_RESTART 0
		2011	#endif
		2012
		2013	void noinline
853	evsignal_start (struct ev_signal *w)	2014	ev_signal_start (EV_P_ ev_signal *w)
854	{	2015	{
		2016	#if EV_MULTIPLICITY
		2017	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2018	#endif
855	if (ev_is_active (w))	2019	if (expect_false (ev_is_active (w)))
856	return;	2020	return;
857		2021
858	ev_start ((W)w, 1);	2022	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2023
		2024	evpipe_init (EV_A);
		2025
		2026	{
		2027	#ifndef _WIN32
		2028	sigset_t full, prev;
		2029	sigfillset (&full);
		2030	sigprocmask (SIG_SETMASK, &full, &prev);
		2031	#endif
		2032
859	array_needsize (signals, signalmax, w->signum, signals_init);	2033	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2034
		2035	#ifndef _WIN32
		2036	sigprocmask (SIG_SETMASK, &prev, 0);
		2037	#endif
		2038	}
		2039
		2040	ev_start (EV_A_ (W)w, 1);
860	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2041	wlist_add (&signals [w->signum - 1].head, (WL)w);
861		2042
862	if (!w->next)	2043	if (!((WL)w)->next)
863	{	2044	{
		2045	#if _WIN32
		2046	signal (w->signum, ev_sighandler);
		2047	#else
864	struct sigaction sa;	2048	struct sigaction sa;
865	sa.sa_handler = sighandler;	2049	sa.sa_handler = ev_sighandler;
866	sigfillset (&sa.sa_mask);	2050	sigfillset (&sa.sa_mask);
867	sa.sa_flags = 0;	2051	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
868	sigaction (w->signum, &sa, 0);	2052	sigaction (w->signum, &sa, 0);
		2053	#endif
869	}	2054	}
870	}	2055	}
871		2056
872	void	2057	void noinline
873	evsignal_stop (struct ev_signal *w)	2058	ev_signal_stop (EV_P_ ev_signal *w)
874	{	2059	{
875	ev_clear ((W)w);	2060	clear_pending (EV_A_ (W)w);
876	if (!ev_is_active (w))	2061	if (expect_false (!ev_is_active (w)))
877	return;	2062	return;
878		2063
879	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2064	wlist_del (&signals [w->signum - 1].head, (WL)w);
880	ev_stop ((W)w);	2065	ev_stop (EV_A_ (W)w);
881		2066
882	if (!signals [w->signum - 1].head)	2067	if (!signals [w->signum - 1].head)
883	signal (w->signum, SIG_DFL);	2068	signal (w->signum, SIG_DFL);
884	}	2069	}
885		2070
886	void evidle_start (struct ev_idle *w)	2071	void
		2072	ev_child_start (EV_P_ ev_child *w)
887	{	2073	{
		2074	#if EV_MULTIPLICITY
		2075	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2076	#endif
888	if (ev_is_active (w))	2077	if (expect_false (ev_is_active (w)))
889	return;	2078	return;
890		2079
891	ev_start ((W)w, ++idlecnt);	2080	ev_start (EV_A_ (W)w, 1);
892	array_needsize (idles, idlemax, idlecnt, );	2081	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
893	idles [idlecnt - 1] = w;
894	}	2082	}
895		2083
896	void evidle_stop (struct ev_idle *w)	2084	void
		2085	ev_child_stop (EV_P_ ev_child *w)
897	{	2086	{
898	ev_clear ((W)w);	2087	clear_pending (EV_A_ (W)w);
899	if (ev_is_active (w))	2088	if (expect_false (!ev_is_active (w)))
900	return;	2089	return;
901		2090
902	idles [w->active - 1] = idles [--idlecnt];	2091	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
903	ev_stop ((W)w);	2092	ev_stop (EV_A_ (W)w);
904	}	2093	}
905		2094
		2095	#if EV_STAT_ENABLE
		2096
		2097	# ifdef _WIN32
		2098	# undef lstat
		2099	# define lstat(a,b) _stati64 (a,b)
		2100	# endif
		2101
		2102	#define DEF_STAT_INTERVAL 5.0074891
		2103	#define MIN_STAT_INTERVAL 0.1074891
		2104
		2105	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2106
		2107	#if EV_USE_INOTIFY
		2108	# define EV_INOTIFY_BUFSIZE 8192
		2109
		2110	static void noinline
		2111	infy_add (EV_P_ ev_stat *w)
		2112	{
		2113	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);
		2114
		2115	if (w->wd < 0)
		2116	{
		2117	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2118
		2119	/* monitor some parent directory for speedup hints */
		2120	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2121	/* but an efficiency issue only */
		2122	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2123	{
		2124	char path [4096];
		2125	strcpy (path, w->path);
		2126
		2127	do
		2128	{
		2129	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2130	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2131
		2132	char *pend = strrchr (path, '/');
		2133
		2134	if (!pend)
		2135	break; /* whoops, no '/', complain to your admin */
		2136
		2137	*pend = 0;
		2138	w->wd = inotify_add_watch (fs_fd, path, mask);
		2139	}
		2140	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2141	}
		2142	}
		2143	else
		2144	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2145
		2146	if (w->wd >= 0)
		2147	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2148	}
		2149
		2150	static void noinline
		2151	infy_del (EV_P_ ev_stat *w)
		2152	{
		2153	int slot;
		2154	int wd = w->wd;
		2155
		2156	if (wd < 0)
		2157	return;
		2158
		2159	w->wd = -2;
		2160	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2161	wlist_del (&fs_hash [slot].head, (WL)w);
		2162
		2163	/* remove this watcher, if others are watching it, they will rearm */
		2164	inotify_rm_watch (fs_fd, wd);
		2165	}
		2166
		2167	static void noinline
		2168	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2169	{
		2170	if (slot < 0)
		2171	/* overflow, need to check for all hahs slots */
		2172	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2173	infy_wd (EV_A_ slot, wd, ev);
		2174	else
		2175	{
		2176	WL w_;
		2177
		2178	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2179	{
		2180	ev_stat *w = (ev_stat *)w_;
		2181	w_ = w_->next; /* lets us remove this watcher and all before it */
		2182
		2183	if (w->wd == wd || wd == -1)
		2184	{
		2185	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2186	{
		2187	w->wd = -1;
		2188	infy_add (EV_A_ w); /* re-add, no matter what */
		2189	}
		2190
		2191	stat_timer_cb (EV_A_ &w->timer, 0);
		2192	}
		2193	}
		2194	}
		2195	}
		2196
		2197	static void
		2198	infy_cb (EV_P_ ev_io *w, int revents)
		2199	{
		2200	char buf [EV_INOTIFY_BUFSIZE];
		2201	struct inotify_event *ev = (struct inotify_event *)buf;
		2202	int ofs;
		2203	int len = read (fs_fd, buf, sizeof (buf));
		2204
		2205	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2206	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2207	}
		2208
		2209	void inline_size
		2210	infy_init (EV_P)
		2211	{
		2212	if (fs_fd != -2)
		2213	return;
		2214
		2215	fs_fd = inotify_init ();
		2216
		2217	if (fs_fd >= 0)
		2218	{
		2219	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2220	ev_set_priority (&fs_w, EV_MAXPRI);
		2221	ev_io_start (EV_A_ &fs_w);
		2222	}
		2223	}
		2224
		2225	void inline_size
		2226	infy_fork (EV_P)
		2227	{
		2228	int slot;
		2229
		2230	if (fs_fd < 0)
		2231	return;
		2232
		2233	close (fs_fd);
		2234	fs_fd = inotify_init ();
		2235
		2236	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2237	{
		2238	WL w_ = fs_hash [slot].head;
		2239	fs_hash [slot].head = 0;
		2240
		2241	while (w_)
		2242	{
		2243	ev_stat *w = (ev_stat *)w_;
		2244	w_ = w_->next; /* lets us add this watcher */
		2245
		2246	w->wd = -1;
		2247
		2248	if (fs_fd >= 0)
		2249	infy_add (EV_A_ w); /* re-add, no matter what */
		2250	else
		2251	ev_timer_start (EV_A_ &w->timer);
		2252	}
		2253
		2254	}
		2255	}
		2256
		2257	#endif
		2258
		2259	void
		2260	ev_stat_stat (EV_P_ ev_stat *w)
		2261	{
		2262	if (lstat (w->path, &w->attr) < 0)
		2263	w->attr.st_nlink = 0;
		2264	else if (!w->attr.st_nlink)
		2265	w->attr.st_nlink = 1;
		2266	}
		2267
		2268	static void noinline
		2269	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2270	{
		2271	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2272
		2273	/* we copy this here each the time so that */
		2274	/* prev has the old value when the callback gets invoked */
		2275	w->prev = w->attr;
		2276	ev_stat_stat (EV_A_ w);
		2277
		2278	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2279	if (
		2280	w->prev.st_dev != w->attr.st_dev
		2281	|| w->prev.st_ino != w->attr.st_ino
		2282	|| w->prev.st_mode != w->attr.st_mode
		2283	|| w->prev.st_nlink != w->attr.st_nlink
		2284	|| w->prev.st_uid != w->attr.st_uid
		2285	|| w->prev.st_gid != w->attr.st_gid
		2286	|| w->prev.st_rdev != w->attr.st_rdev
		2287	|| w->prev.st_size != w->attr.st_size
		2288	|| w->prev.st_atime != w->attr.st_atime
		2289	|| w->prev.st_mtime != w->attr.st_mtime
		2290	|| w->prev.st_ctime != w->attr.st_ctime
		2291	) {
		2292	#if EV_USE_INOTIFY
		2293	infy_del (EV_A_ w);
		2294	infy_add (EV_A_ w);
		2295	ev_stat_stat (EV_A_ w); /* avoid race... */
		2296	#endif
		2297
		2298	ev_feed_event (EV_A_ w, EV_STAT);
		2299	}
		2300	}
		2301
		2302	void
		2303	ev_stat_start (EV_P_ ev_stat *w)
		2304	{
		2305	if (expect_false (ev_is_active (w)))
		2306	return;
		2307
		2308	/* since we use memcmp, we need to clear any padding data etc. */
		2309	memset (&w->prev, 0, sizeof (ev_statdata));
		2310	memset (&w->attr, 0, sizeof (ev_statdata));
		2311
		2312	ev_stat_stat (EV_A_ w);
		2313
		2314	if (w->interval < MIN_STAT_INTERVAL)
		2315	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2316
		2317	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2318	ev_set_priority (&w->timer, ev_priority (w));
		2319
		2320	#if EV_USE_INOTIFY
		2321	infy_init (EV_A);
		2322
		2323	if (fs_fd >= 0)
		2324	infy_add (EV_A_ w);
		2325	else
		2326	#endif
		2327	ev_timer_start (EV_A_ &w->timer);
		2328
		2329	ev_start (EV_A_ (W)w, 1);
		2330	}
		2331
		2332	void
		2333	ev_stat_stop (EV_P_ ev_stat *w)
		2334	{
		2335	clear_pending (EV_A_ (W)w);
		2336	if (expect_false (!ev_is_active (w)))
		2337	return;
		2338
		2339	#if EV_USE_INOTIFY
		2340	infy_del (EV_A_ w);
		2341	#endif
		2342	ev_timer_stop (EV_A_ &w->timer);
		2343
		2344	ev_stop (EV_A_ (W)w);
		2345	}
		2346	#endif
		2347
		2348	#if EV_IDLE_ENABLE
		2349	void
		2350	ev_idle_start (EV_P_ ev_idle *w)
		2351	{
		2352	if (expect_false (ev_is_active (w)))
		2353	return;
		2354
		2355	pri_adjust (EV_A_ (W)w);
		2356
		2357	{
		2358	int active = ++idlecnt [ABSPRI (w)];
		2359
		2360	++idleall;
		2361	ev_start (EV_A_ (W)w, active);
		2362
		2363	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2364	idles [ABSPRI (w)][active - 1] = w;
		2365	}
		2366	}
		2367
		2368	void
		2369	ev_idle_stop (EV_P_ ev_idle *w)
		2370	{
		2371	clear_pending (EV_A_ (W)w);
		2372	if (expect_false (!ev_is_active (w)))
		2373	return;
		2374
		2375	{
		2376	int active = ev_active (w);
		2377
		2378	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2379	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2380
		2381	ev_stop (EV_A_ (W)w);
		2382	--idleall;
		2383	}
		2384	}
		2385	#endif
		2386
		2387	void
906	void evprepare_start (struct ev_prepare *w)	2388	ev_prepare_start (EV_P_ ev_prepare *w)
907	{	2389	{
908	if (ev_is_active (w))	2390	if (expect_false (ev_is_active (w)))
909	return;	2391	return;
910		2392
911	ev_start ((W)w, ++preparecnt);	2393	ev_start (EV_A_ (W)w, ++preparecnt);
912	array_needsize (prepares, preparemax, preparecnt, );	2394	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
913	prepares [preparecnt - 1] = w;	2395	prepares [preparecnt - 1] = w;
914	}	2396	}
915		2397
		2398	void
916	void evprepare_stop (struct ev_prepare *w)	2399	ev_prepare_stop (EV_P_ ev_prepare *w)
917	{	2400	{
918	ev_clear ((W)w);	2401	clear_pending (EV_A_ (W)w);
919	if (ev_is_active (w))	2402	if (expect_false (!ev_is_active (w)))
920	return;	2403	return;
921		2404
		2405	{
		2406	int active = ev_active (w);
		2407
922	prepares [w->active - 1] = prepares [--preparecnt];	2408	prepares [active - 1] = prepares [--preparecnt];
		2409	ev_active (prepares [active - 1]) = active;
		2410	}
		2411
923	ev_stop ((W)w);	2412	ev_stop (EV_A_ (W)w);
924	}	2413	}
925		2414
		2415	void
926	void evcheck_start (struct ev_check *w)	2416	ev_check_start (EV_P_ ev_check *w)
927	{	2417	{
928	if (ev_is_active (w))	2418	if (expect_false (ev_is_active (w)))
929	return;	2419	return;
930		2420
931	ev_start ((W)w, ++checkcnt);	2421	ev_start (EV_A_ (W)w, ++checkcnt);
932	array_needsize (checks, checkmax, checkcnt, );	2422	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
933	checks [checkcnt - 1] = w;	2423	checks [checkcnt - 1] = w;
934	}	2424	}
935		2425
		2426	void
936	void evcheck_stop (struct ev_check *w)	2427	ev_check_stop (EV_P_ ev_check *w)
937	{	2428	{
938	ev_clear ((W)w);	2429	clear_pending (EV_A_ (W)w);
939	if (ev_is_active (w))	2430	if (expect_false (!ev_is_active (w)))
940	return;	2431	return;
941		2432
		2433	{
		2434	int active = ev_active (w);
		2435
942	checks [w->active - 1] = checks [--checkcnt];	2436	checks [active - 1] = checks [--checkcnt];
		2437	ev_active (checks [active - 1]) = active;
		2438	}
		2439
943	ev_stop ((W)w);	2440	ev_stop (EV_A_ (W)w);
944	}	2441	}
945		2442
946	void evchild_start (struct ev_child *w)	2443	#if EV_EMBED_ENABLE
		2444	void noinline
		2445	ev_embed_sweep (EV_P_ ev_embed *w)
947	{	2446	{
		2447	ev_loop (w->other, EVLOOP_NONBLOCK);
		2448	}
		2449
		2450	static void
		2451	embed_io_cb (EV_P_ ev_io *io, int revents)
		2452	{
		2453	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2454
948	if (ev_is_active (w))	2455	if (ev_cb (w))
949	return;	2456	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2457	else
		2458	ev_loop (w->other, EVLOOP_NONBLOCK);
		2459	}
950		2460
		2461	static void
		2462	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2463	{
		2464	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2465
		2466	{
		2467	struct ev_loop *loop = w->other;
		2468
		2469	while (fdchangecnt)
		2470	{
		2471	fd_reify (EV_A);
		2472	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2473	}
		2474	}
		2475	}
		2476
		2477	#if 0
		2478	static void
		2479	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2480	{
		2481	ev_idle_stop (EV_A_ idle);
		2482	}
		2483	#endif
		2484
		2485	void
		2486	ev_embed_start (EV_P_ ev_embed *w)
		2487	{
		2488	if (expect_false (ev_is_active (w)))
		2489	return;
		2490
		2491	{
		2492	struct ev_loop *loop = w->other;
		2493	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2494	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2495	}
		2496
		2497	ev_set_priority (&w->io, ev_priority (w));
		2498	ev_io_start (EV_A_ &w->io);
		2499
		2500	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2501	ev_set_priority (&w->prepare, EV_MINPRI);
		2502	ev_prepare_start (EV_A_ &w->prepare);
		2503
		2504	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2505
951	ev_start ((W)w, 1);	2506	ev_start (EV_A_ (W)w, 1);
952	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
953	}	2507	}
954		2508
955	void evchild_stop (struct ev_child *w)	2509	void
		2510	ev_embed_stop (EV_P_ ev_embed *w)
956	{	2511	{
957	ev_clear ((W)w);	2512	clear_pending (EV_A_ (W)w);
958	if (ev_is_active (w))	2513	if (expect_false (!ev_is_active (w)))
959	return;	2514	return;
960		2515
961	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2516	ev_io_stop (EV_A_ &w->io);
		2517	ev_prepare_stop (EV_A_ &w->prepare);
		2518
962	ev_stop ((W)w);	2519	ev_stop (EV_A_ (W)w);
963	}	2520	}
		2521	#endif
		2522
		2523	#if EV_FORK_ENABLE
		2524	void
		2525	ev_fork_start (EV_P_ ev_fork *w)
		2526	{
		2527	if (expect_false (ev_is_active (w)))
		2528	return;
		2529
		2530	ev_start (EV_A_ (W)w, ++forkcnt);
		2531	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2532	forks [forkcnt - 1] = w;
		2533	}
		2534
		2535	void
		2536	ev_fork_stop (EV_P_ ev_fork *w)
		2537	{
		2538	clear_pending (EV_A_ (W)w);
		2539	if (expect_false (!ev_is_active (w)))
		2540	return;
		2541
		2542	{
		2543	int active = ev_active (w);
		2544
		2545	forks [active - 1] = forks [--forkcnt];
		2546	ev_active (forks [active - 1]) = active;
		2547	}
		2548
		2549	ev_stop (EV_A_ (W)w);
		2550	}
		2551	#endif
		2552
		2553	#if EV_ASYNC_ENABLE
		2554	void
		2555	ev_async_start (EV_P_ ev_async *w)
		2556	{
		2557	if (expect_false (ev_is_active (w)))
		2558	return;
		2559
		2560	evpipe_init (EV_A);
		2561
		2562	ev_start (EV_A_ (W)w, ++asynccnt);
		2563	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2564	asyncs [asynccnt - 1] = w;
		2565	}
		2566
		2567	void
		2568	ev_async_stop (EV_P_ ev_async *w)
		2569	{
		2570	clear_pending (EV_A_ (W)w);
		2571	if (expect_false (!ev_is_active (w)))
		2572	return;
		2573
		2574	{
		2575	int active = ev_active (w);
		2576
		2577	asyncs [active - 1] = asyncs [--asynccnt];
		2578	ev_active (asyncs [active - 1]) = active;
		2579	}
		2580
		2581	ev_stop (EV_A_ (W)w);
		2582	}
		2583
		2584	void
		2585	ev_async_send (EV_P_ ev_async *w)
		2586	{
		2587	w->sent = 1;
		2588	evpipe_write (EV_A_ &gotasync);
		2589	}
		2590	#endif
964		2591
965	/*****************************************************************************/	2592	/*****************************************************************************/
966		2593
967	struct ev_once	2594	struct ev_once
968	{	2595	{
969	struct ev_io io;	2596	ev_io io;
970	struct ev_timer to;	2597	ev_timer to;
971	void (*cb)(int revents, void *arg);	2598	void (*cb)(int revents, void *arg);
972	void *arg;	2599	void *arg;
973	};	2600	};
974		2601
975	static void	2602	static void
976	once_cb (struct ev_once *once, int revents)	2603	once_cb (EV_P_ struct ev_once *once, int revents)
977	{	2604	{
978	void (*cb)(int revents, void *arg) = once->cb;	2605	void (*cb)(int revents, void *arg) = once->cb;
979	void *arg = once->arg;	2606	void *arg = once->arg;
980		2607
981	evio_stop (&once->io);	2608	ev_io_stop (EV_A_ &once->io);
982	evtimer_stop (&once->to);	2609	ev_timer_stop (EV_A_ &once->to);
983	free (once);	2610	ev_free (once);
984		2611
985	cb (revents, arg);	2612	cb (revents, arg);
986	}	2613	}
987		2614
988	static void	2615	static void
989	once_cb_io (struct ev_io *w, int revents)	2616	once_cb_io (EV_P_ ev_io *w, int revents)
990	{	2617	{
991	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2618	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
992	}	2619	}
993		2620
994	static void	2621	static void
995	once_cb_to (struct ev_timer *w, int revents)	2622	once_cb_to (EV_P_ ev_timer *w, int revents)
996	{	2623	{
997	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2624	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
998	}	2625	}
999		2626
1000	void	2627	void
1001	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2628	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1002	{	2629	{
1003	struct ev_once *once = malloc (sizeof (struct ev_once));	2630	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1004		2631
1005	if (!once)	2632	if (expect_false (!once))
1006	cb (EV_ERROR, arg);	2633	{
1007	else	2634	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		2635	return;
1008	{	2636	}
		2637
1009	once->cb = cb;	2638	once->cb = cb;
1010	once->arg = arg;	2639	once->arg = arg;
1011		2640
1012	evw_init (&once->io, once_cb_io);	2641	ev_init (&once->io, once_cb_io);
1013
1014	if (fd >= 0)	2642	if (fd >= 0)
1015	{	2643	{
1016	evio_set (&once->io, fd, events);	2644	ev_io_set (&once->io, fd, events);
1017	evio_start (&once->io);	2645	ev_io_start (EV_A_ &once->io);
1018	}	2646	}
1019		2647
1020	evw_init (&once->to, once_cb_to);	2648	ev_init (&once->to, once_cb_to);
1021
1022	if (timeout >= 0.)	2649	if (timeout >= 0.)
1023	{	2650	{
1024	evtimer_set (&once->to, timeout, 0.);	2651	ev_timer_set (&once->to, timeout, 0.);
1025	evtimer_start (&once->to);	2652	ev_timer_start (EV_A_ &once->to);
1026	}
1027	}
1028	}
1029
1030	/*****************************************************************************/
1031
1032	#if 0
1033
1034	struct ev_io wio;
1035
1036	static void
1037	sin_cb (struct ev_io *w, int revents)
1038	{
1039	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1040	}
1041
1042	static void
1043	ocb (struct ev_timer *w, int revents)
1044	{
1045	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1046	evtimer_stop (w);
1047	evtimer_start (w);
1048	}
1049
1050	static void
1051	scb (struct ev_signal *w, int revents)
1052	{
1053	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1054	evio_stop (&wio);
1055	evio_start (&wio);
1056	}
1057
1058	static void
1059	gcb (struct ev_signal *w, int revents)
1060	{
1061	fprintf (stderr, "generic %x\n", revents);
1062
1063	}
1064
1065	int main (void)
1066	{
1067	ev_init (0);
1068
1069	evio_init (&wio, sin_cb, 0, EV_READ);
1070	evio_start (&wio);
1071
1072	struct ev_timer t[10000];
1073
1074	#if 0
1075	int i;
1076	for (i = 0; i < 10000; ++i)
1077	{	2653	}
1078	struct ev_timer *w = t + i;
1079	evw_init (w, ocb, i);
1080	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1081	evtimer_start (w);
1082	if (drand48 () < 0.5)
1083	evtimer_stop (w);
1084	}
1085	#endif
1086
1087	struct ev_timer t1;
1088	evtimer_init (&t1, ocb, 5, 10);
1089	evtimer_start (&t1);
1090
1091	struct ev_signal sig;
1092	evsignal_init (&sig, scb, SIGQUIT);
1093	evsignal_start (&sig);
1094
1095	struct ev_check cw;
1096	evcheck_init (&cw, gcb);
1097	evcheck_start (&cw);
1098
1099	struct ev_idle iw;
1100	evidle_init (&iw, gcb);
1101	evidle_start (&iw);
1102
1103	ev_loop (0);
1104
1105	return 0;
1106	}	2654	}
1107		2655
		2656	#if EV_MULTIPLICITY
		2657	#include "ev_wrap.h"
1108	#endif	2658	#endif
1109		2659
		2660	#ifdef __cplusplus
		2661	}
		2662	#endif
1110		2663
1111
1112

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