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Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.233 by root, Tue May 6 23:34:16 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
29	#if EV_USE_CONFIG_H	46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
30	# include "config.h"	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
31	#endif	132	#endif
32		133
33	#include <math.h>	134	#include <math.h>
34	#include <stdlib.h>	135	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	136	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	137	#include <stddef.h>
39		138
40	#include <stdio.h>	139	#include <stdio.h>
41		140
42	#include <assert.h>	141	#include <assert.h>
43	#include <errno.h>	142	#include <errno.h>
44	#include <sys/types.h>	143	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	144	#include <time.h>
48		145
		146	#include <signal.h>
		147
		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
		163	# endif
		164	#endif
		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
		167
49	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	169	# define EV_USE_MONOTONIC 0
52	# endif	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
53	#endif	178	#endif
54		179
55	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
57	#endif	182	#endif
58		183
		184	#ifndef EV_USE_POLL
		185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
		190	#endif
		191
59	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
60	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
		198	#endif
		199
		200	#ifndef EV_USE_KQUEUE
		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
		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
61	#endif	245	#endif
62		246
63	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
		248	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
65	#endif	250	#endif
66	#ifndef EV_USE_REALTIME	251
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	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>
68	#endif	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 */
69		294
70	#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) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
74		298
75	#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
76		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
77	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
80		329
81	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
82	ev_tstamp ev_now;	450	ev_tstamp ev_rt_now;
83	int ev_method;	451	#define VAR(name,decl) static decl;
		452	#include "ev_vars.h"
		453	#undef VAR
84		454
85	static int have_monotonic; /* runtime */	455	static int ev_default_loop_ptr;
86		456
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	457	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		458
91	/*****************************************************************************/	459	/*****************************************************************************/
92		460
93	ev_tstamp	461	ev_tstamp
94	ev_time (void)	462	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	472	#endif
105	}	473	}
106		474
107	static ev_tstamp	475	ev_tstamp inline_size
108	get_clock (void)	476	get_clock (void)
109	{	477	{
110	#if EV_USE_MONOTONIC	478	#if EV_USE_MONOTONIC
111	if (have_monotonic)	479	if (expect_true (have_monotonic))
112	{	480	{
113	struct timespec ts;	481	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	482	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	483	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	484	}
117	#endif	485	#endif
118		486
119	return ev_time ();	487	return ev_time ();
120	}	488	}
121		489
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	490	#if EV_MULTIPLICITY
		491	ev_tstamp
		492	ev_now (EV_P)
		493	{
		494	return ev_rt_now;
		495	}
		496	#endif
123		497
124	#define array_needsize(base,cur,cnt,init) \	498	void
125	if ((cnt) > cur) \	499	ev_sleep (ev_tstamp delay)
126	{ \	500	{
127	int newcnt = cur; \	501	if (delay > 0.)
128	do \
129	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \
131	} \
132	while ((cnt) > newcnt); \
133	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \
135	init (base + cur, newcnt - cur); \
136	cur = newcnt; \
137	}	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	}
138		522
139	/*****************************************************************************/	523	/*****************************************************************************/
140		524
141	typedef struct	525	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
142	{
143	struct ev_io *head;
144	int events;
145	} ANFD;
146		526
147	static ANFD *anfds;	527	int inline_size
148	static int anfdmax;	528	array_nextsize (int elem, int cur, int cnt)
		529	{
		530	int ncur = cur + 1;
149		531
150	static void	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
151	anfds_init (ANFD *base, int count)	608	anfds_init (ANFD *base, int count)
152	{	609	{
153	while (count--)	610	while (count--)
154	{	611	{
155	base->head = 0;	612	base->head = 0;
156	base->events = EV_NONE;	613	base->events = EV_NONE;
		614	base->reify = 0;
		615
157	++base;	616	++base;
158	}	617	}
159	}	618	}
160		619
161	typedef struct	620	void inline_speed
162	{
163	W w;
164	int events;
165	} ANPENDING;
166
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void
171	event (W w, int events)
172	{
173	w->pending = ++pendingcnt;
174	array_needsize (pendings, pendingmax, pendingcnt, );
175	pendings [pendingcnt - 1].w = w;
176	pendings [pendingcnt - 1].events = events;
177	}
178
179	static void
180	queue_events (W *events, int eventcnt, int type)
181	{
182	int i;
183
184	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);
186	}
187
188	static void
189	fd_event (int fd, int events)	621	fd_event (EV_P_ int fd, int revents)
190	{	622	{
191	ANFD *anfd = anfds + fd;	623	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	624	ev_io *w;
193		625
194	for (w = anfd->head; w; w = w->next)	626	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
195	{	627	{
196	int ev = w->events & events;	628	int ev = w->events & revents;
197		629
198	if (ev)	630	if (ev)
199	event ((W)w, ev);	631	ev_feed_event (EV_A_ (W)w, ev);
200	}	632	}
201	}	633	}
202		634
203	/*****************************************************************************/	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	}
204		641
205	static int *fdchanges;	642	void inline_size
206	static int fdchangemax, fdchangecnt;	643	fd_reify (EV_P)
207
208	static void
209	fd_reify (void)
210	{	644	{
211	int i;	645	int i;
212		646
213	for (i = 0; i < fdchangecnt; ++i)	647	for (i = 0; i < fdchangecnt; ++i)
214	{	648	{
215	int fd = fdchanges [i];	649	int fd = fdchanges [i];
216	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	651	ev_io *w;
218		652
219	int events = 0;	653	unsigned char events = 0;
220		654
221	for (w = anfd->head; w; w = w->next)	655	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
222	events |= w->events;	656	events |= (unsigned char)w->events;
223		657
224	anfd->events &= ~EV_REIFY;	658	#if EV_SELECT_IS_WINSOCKET
225		659	if (events)
226	if (anfd->events != events)
227	{	660	{
228	method_modify (fd, anfd->events, events);	661	unsigned long argp;
229	anfd->events = events;	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));
230	}	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	}
231	}	681	}
232		682
233	fdchangecnt = 0;	683	fdchangecnt = 0;
234	}	684	}
235		685
236	static void	686	void inline_size
237	fd_change (int fd)	687	fd_change (EV_P_ int fd, int flags)
238	{	688	{
239	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	689	unsigned char reify = anfds [fd].reify;
240	return;	690	anfds [fd].reify |= flags;
241		691
242	anfds [fd].events |= EV_REIFY;	692	if (expect_true (!reify))
243		693	{
244	++fdchangecnt;	694	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
246	fdchanges [fdchangecnt - 1] = fd;	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
247	}	720	}
248		721
249	/* called on EBADF to verify fds */	722	/* called on EBADF to verify fds */
250	static void	723	static void noinline
251	fd_recheck (void)	724	fd_ebadf (EV_P)
252	{	725	{
253	int fd;	726	int fd;
254		727
255	for (fd = 0; fd < anfdmax; ++fd)	728	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	729	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	730	if (!fd_valid (fd) == -1 && errno == EBADF)
258	while (anfds [fd].head)	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)
259	{	742	{
260	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	743	fd_kill (EV_A_ fd);
261	ev_io_stop (anfds [fd].head);	744	return;
262	}	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	}
263	}	760	}
264		761
265	/*****************************************************************************/	762	/*****************************************************************************/
266		763
267	static struct ev_timer **timers;	764	/* towards the root */
268	static int timermax, timercnt;	765	void inline_speed
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void
274	upheap (WT *timers, int k)	766	upheap (WT *heap, int k)
275	{	767	{
276	WT w = timers [k];	768	WT w = heap [k];
277		769
278	while (k && timers [k >> 1]->at > w->at)	770	for (;;)
279	{
280	timers [k] = timers [k >> 1];
281	timers [k]->active = k + 1;
282	k >>= 1;
283	}	771	{
284
285	timers [k] = w;
286	timers [k]->active = k + 1;
287
288	}
289
290	static void
291	downheap (WT *timers, int N, int k)
292	{
293	WT w = timers [k];
294
295	while (k < (N >> 1))
296	{
297	int j = k << 1;	772	int p = k >> 1;
298		773
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	774	/* maybe we could use a dummy element at heap [0]? */
300	++j;	775	if (!p || heap [p]->at <= w->at)
301
302	if (w->at <= timers [j]->at)
303	break;	776	break;
304		777
305	timers [k] = timers [j];	778	heap [k] = heap [p];
306	timers [k]->active = k + 1;	779	ev_active (heap [k]) = k;
307	k = j;	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 (;;)
308	}	794	{
		795	int c = k << 1;
309		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
310	timers [k] = w;	812	heap [k] = w;
311	timers [k]->active = k + 1;	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);
312	}	821	}
313		822
314	/*****************************************************************************/	823	/*****************************************************************************/
315		824
316	typedef struct	825	typedef struct
317	{	826	{
318	struct ev_signal *head;	827	WL head;
319	sig_atomic_t gotsig;	828	EV_ATOMIC_T gotsig;
320	} ANSIG;	829	} ANSIG;
321		830
322	static ANSIG *signals;	831	static ANSIG *signals;
323	static int signalmax;	832	static int signalmax;
324		833
325	static int sigpipe [2];	834	static EV_ATOMIC_T gotsig;
326	static sig_atomic_t gotsig;
327	static struct ev_io sigev;
328		835
329	static void	836	void inline_size
330	signals_init (ANSIG *base, int count)	837	signals_init (ANSIG *base, int count)
331	{	838	{
332	while (count--)	839	while (count--)
333	{	840	{
334	base->head = 0;	841	base->head = 0;
335	base->gotsig = 0;	842	base->gotsig = 0;
		843
336	++base;	844	++base;
337	}	845	}
338	}	846	}
339		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
340	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
341	sighandler (int signum)	958	ev_sighandler (int signum)
342	{	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
343	signals [signum - 1].gotsig = 1;	968	signals [signum - 1].gotsig = 1;
344		969	evpipe_write (EV_A_ &gotsig);
345	if (!gotsig)
346	{
347	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);
349	}
350	}	970	}
351		971
352	static void	972	void noinline
353	sigcb (struct ev_io *iow, int revents)	973	ev_feed_signal_event (EV_P_ int signum)
354	{	974	{
355	struct ev_signal *w;	975	WL w;
356	int sig;
357		976
358	gotsig = 0;	977	#if EV_MULTIPLICITY
359	read (sigpipe [0], &revents, 1);	978	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		979	#endif
360		980
361	for (sig = signalmax; sig--; )	981	--signum;
362	if (signals [sig].gotsig)	982
363	{	983	if (signum < 0 || signum >= signalmax)
		984	return;
		985
364	signals [sig].gotsig = 0;	986	signals [signum].gotsig = 0;
365		987
366	for (w = signals [sig].head; w; w = w->next)	988	for (w = signals [signum].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);	989	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
368	}
369	}
370
371	static void
372	siginit (void)
373	{
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376
377	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
380
381	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);
383	}	990	}
384		991
385	/*****************************************************************************/	992	/*****************************************************************************/
386		993
387	static struct ev_idle **idles;	994	static WL childs [EV_PID_HASHSIZE];
388	static int idlemax, idlecnt;
389		995
390	static struct ev_prepare **prepares;	996	#ifndef _WIN32
391	static int preparemax, preparecnt;
392		997
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397
398	static struct ev_child *childs [PID_HASHSIZE];
399	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	}
400		1022
401	#ifndef WCONTINUED	1023	#ifndef WCONTINUED
402	# define WCONTINUED 0	1024	# define WCONTINUED 0
403	#endif	1025	#endif
404		1026
405	static void	1027	static void
406	childcb (struct ev_signal *sw, int revents)	1028	childcb (EV_P_ ev_signal *sw, int revents)
407	{	1029	{
408	struct ev_child *w;
409	int pid, status;	1030	int pid, status;
410		1031
		1032	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	1033	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	1034	if (!WCONTINUED
413	if (w->pid == pid || w->pid == -1)	1035	|| errno != EINVAL
414	{	1036	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
415	w->status = status;	1037	return;
416	event ((W)w, EV_CHILD);	1038
417	}	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 */
418	}	1046	}
		1047
		1048	#endif
419		1049
420	/*****************************************************************************/	1050	/*****************************************************************************/
421		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
422	#if EV_USE_EPOLL	1058	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	1059	# include "ev_epoll.c"
424	#endif	1060	#endif
		1061	#if EV_USE_POLL
		1062	# include "ev_poll.c"
		1063	#endif
425	#if EV_USE_SELECT	1064	#if EV_USE_SELECT
426	# include "ev_select.c"	1065	# include "ev_select.c"
427	#endif	1066	#endif
428		1067
429	int	1068	int
…		…
436	ev_version_minor (void)	1075	ev_version_minor (void)
437	{	1076	{
438	return EV_VERSION_MINOR;	1077	return EV_VERSION_MINOR;
439	}	1078	}
440		1079
441	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)
442	{	1083	{
443	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)
444	{	1164	{
445	#if EV_USE_MONOTONIC	1165	#if EV_USE_MONOTONIC
446	{	1166	{
447	struct timespec ts;	1167	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1168	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	1169	have_monotonic = 1;
450	}	1170	}
451	#endif	1171	#endif
452		1172
453	ev_now = ev_time ();	1173	ev_rt_now = ev_time ();
454	now = get_clock ();	1174	mn_now = get_clock ();
		1175	now_floor = mn_now;
455	diff = ev_now - now;	1176	rtmn_diff = ev_rt_now - mn_now;
456		1177
457	if (pipe (sigpipe))	1178	io_blocktime = 0.;
458	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
459		1186
460	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
461	#if EV_USE_EPOLL	1207	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	1208	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1209	#endif
		1210	#if EV_USE_POLL
		1211	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
463	#endif	1212	#endif
464	#if EV_USE_SELECT	1213	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	1214	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
466	#endif	1215	#endif
467		1216
468	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)
469	{	1238	{
470	ev_watcher_init (&sigev, sigcb);	1239	close (evpipe [0]);
471	siginit ();	1240	close (evpipe [1]);
		1241	}
		1242	}
472		1243
		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
		1376	#endif
		1377
		1378	#if EV_MULTIPLICITY
		1379	struct ev_loop *
		1380	ev_default_loop_init (unsigned int flags)
		1381	#else
		1382	int
		1383	ev_default_loop (unsigned int flags)
		1384	#endif
		1385	{
		1386	if (!ev_default_loop_ptr)
		1387	{
		1388	#if EV_MULTIPLICITY
		1389	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1390	#else
		1391	ev_default_loop_ptr = 1;
		1392	#endif
		1393
		1394	loop_init (EV_A_ flags);
		1395
		1396	if (ev_backend (EV_A))
		1397	{
		1398	#ifndef _WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	1399	ev_signal_init (&childev, childcb, SIGCHLD);
		1400	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	1401	ev_signal_start (EV_A_ &childev);
		1402	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1403	#endif
475	}	1404	}
		1405	else
		1406	ev_default_loop_ptr = 0;
476	}	1407	}
477		1408
478	return ev_method;	1409	return ev_default_loop_ptr;
		1410	}
		1411
		1412	void
		1413	ev_default_destroy (void)
		1414	{
		1415	#if EV_MULTIPLICITY
		1416	struct ev_loop *loop = ev_default_loop_ptr;
		1417	#endif
		1418
		1419	#ifndef _WIN32
		1420	ev_ref (EV_A); /* child watcher */
		1421	ev_signal_stop (EV_A_ &childev);
		1422	#endif
		1423
		1424	loop_destroy (EV_A);
		1425	}
		1426
		1427	void
		1428	ev_default_fork (void)
		1429	{
		1430	#if EV_MULTIPLICITY
		1431	struct ev_loop *loop = ev_default_loop_ptr;
		1432	#endif
		1433
		1434	if (backend)
		1435	postfork = 1; /* must be in line with ev_loop_fork */
479	}	1436	}
480		1437
481	/*****************************************************************************/	1438	/*****************************************************************************/
482		1439
483	void	1440	void
484	ev_prefork (void)	1441	ev_invoke (EV_P_ void *w, int revents)
485	{	1442	{
486	/* nop */	1443	EV_CB_INVOKE ((W)w, revents);
487	}	1444	}
488		1445
489	void	1446	void inline_speed
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif
502
503	ev_io_stop (&sigev);
504	close (sigpipe [0]);
505	close (sigpipe [1]);
506	pipe (sigpipe);
507	siginit ();
508	}
509
510	/*****************************************************************************/
511
512	static void
513	call_pending (void)	1447	call_pending (EV_P)
514	{	1448	{
		1449	int pri;
		1450
		1451	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	1452	while (pendingcnt [pri])
516	{	1453	{
517	ANPENDING *p = pendings + --pendingcnt;	1454	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		1455
519	if (p->w)	1456	if (expect_true (p->w))
520	{	1457	{
		1458	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1459
521	p->w->pending = 0;	1460	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	1461	EV_CB_INVOKE (p->w, p->events);
523	}	1462	}
524	}	1463	}
525	}	1464	}
526		1465
527	static void	1466	void inline_size
528	timers_reify (void)	1467	timers_reify (EV_P)
529	{	1468	{
530	while (timercnt && timers [0]->at <= now)	1469	while (timercnt && ev_at (timers [1]) <= mn_now)
531	{	1470	{
532	struct ev_timer *w = timers [0];	1471	ev_timer *w = (ev_timer *)timers [1];
		1472
		1473	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
533		1474
534	/* first reschedule or stop timer */	1475	/* first reschedule or stop timer */
535	if (w->repeat)	1476	if (w->repeat)
536	{	1477	{
537	w->at = now + w->repeat;	1478	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
538	assert (("timer timeout in the past, negative repeat?", w->at > now));	1479
		1480	ev_at (w) += w->repeat;
		1481	if (ev_at (w) < mn_now)
		1482	ev_at (w) = mn_now;
		1483
539	downheap ((WT *)timers, timercnt, 0);	1484	downheap (timers, timercnt, 1);
540	}	1485	}
541	else	1486	else
542	ev_timer_stop (w); /* nonrepeating: stop timer */	1487	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543		1488
544	event ((W)w, EV_TIMEOUT);	1489	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
545	}	1490	}
546	}	1491	}
547		1492
548	static void	1493	#if EV_PERIODIC_ENABLE
		1494	void inline_size
549	periodics_reify (void)	1495	periodics_reify (EV_P)
550	{	1496	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	1497	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
552	{	1498	{
553	struct ev_periodic *w = periodics [0];	1499	ev_periodic *w = (ev_periodic *)periodics [1];
		1500
		1501	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
554		1502
555	/* first reschedule or stop timer */	1503	/* first reschedule or stop timer */
556	if (w->interval)	1504	if (w->reschedule_cb)
557	{	1505	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1506	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
559	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1507	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	1508	downheap (periodics, periodiccnt, 1);
		1509	}
		1510	else if (w->interval)
		1511	{
		1512	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1513	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1514	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1515	downheap (periodics, periodiccnt, 1);
561	}	1516	}
562	else	1517	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	1518	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		1519
565	event ((W)w, EV_TIMEOUT);	1520	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566	}	1521	}
567	}	1522	}
568		1523
569	static void	1524	static void noinline
570	periodics_reschedule (ev_tstamp diff)	1525	periodics_reschedule (EV_P)
571	{	1526	{
572	int i;	1527	int i;
573		1528
574	/* adjust periodics after time jump */	1529	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	1530	for (i = 1; i <= periodiccnt; ++i)
576	{	1531	{
577	struct ev_periodic *w = periodics [i];	1532	ev_periodic *w = (ev_periodic *)periodics [i];
578		1533
		1534	if (w->reschedule_cb)
		1535	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
579	if (w->interval)	1536	else if (w->interval)
		1537	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1538	}
		1539
		1540	/* now rebuild the heap */
		1541	for (i = periodiccnt >> 1; i--; )
		1542	downheap (periodics, periodiccnt, i);
		1543	}
		1544	#endif
		1545
		1546	#if EV_IDLE_ENABLE
		1547	void inline_size
		1548	idle_reify (EV_P)
		1549	{
		1550	if (expect_false (idleall))
		1551	{
		1552	int pri;
		1553
		1554	for (pri = NUMPRI; pri--; )
580	{	1555	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1556	if (pendingcnt [pri])
		1557	break;
582		1558
583	if (fabs (diff) >= 1e-4)	1559	if (idlecnt [pri])
584	{	1560	{
585	ev_periodic_stop (w);	1561	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
586	ev_periodic_start (w);	1562	break;
587
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */
589	}	1563	}
590	}	1564	}
591	}	1565	}
592	}	1566	}
		1567	#endif
593		1568
594	static void	1569	void inline_speed
595	time_update (void)	1570	time_update (EV_P_ ev_tstamp max_block)
596	{	1571	{
597	int i;	1572	int i;
598		1573
599	ev_now = ev_time ();	1574	#if EV_USE_MONOTONIC
600
601	if (have_monotonic)	1575	if (expect_true (have_monotonic))
602	{	1576	{
603	ev_tstamp odiff = diff;	1577	ev_tstamp odiff = rtmn_diff;
604		1578
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1579	mn_now = get_clock ();
		1580
		1581	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1582	/* interpolate in the meantime */
		1583	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
606	{	1584	{
607	now = get_clock ();	1585	ev_rt_now = rtmn_diff + mn_now;
		1586	return;
		1587	}
		1588
		1589	now_floor = mn_now;
		1590	ev_rt_now = ev_time ();
		1591
		1592	/* loop a few times, before making important decisions.
		1593	* on the choice of "4": one iteration isn't enough,
		1594	* in case we get preempted during the calls to
		1595	* ev_time and get_clock. a second call is almost guaranteed
		1596	* to succeed in that case, though. and looping a few more times
		1597	* doesn't hurt either as we only do this on time-jumps or
		1598	* in the unlikely event of having been preempted here.
		1599	*/
		1600	for (i = 4; --i; )
		1601	{
608	diff = ev_now - now;	1602	rtmn_diff = ev_rt_now - mn_now;
609		1603
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1604	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
611	return; /* all is well */	1605	return; /* all is well */
612		1606
613	ev_now = ev_time ();	1607	ev_rt_now = ev_time ();
		1608	mn_now = get_clock ();
		1609	now_floor = mn_now;
614	}	1610	}
615		1611
		1612	# if EV_PERIODIC_ENABLE
616	periodics_reschedule (diff - odiff);	1613	periodics_reschedule (EV_A);
		1614	# endif
617	/* no timer adjustment, as the monotonic clock doesn't jump */	1615	/* no timer adjustment, as the monotonic clock doesn't jump */
		1616	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
618	}	1617	}
619	else	1618	else
		1619	#endif
620	{	1620	{
621	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1621	ev_rt_now = ev_time ();
		1622
		1623	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
622	{	1624	{
		1625	#if EV_PERIODIC_ENABLE
623	periodics_reschedule (ev_now - now);	1626	periodics_reschedule (EV_A);
624		1627	#endif
625	/* adjust timers. this is easy, as the offset is the same for all */	1628	/* adjust timers. this is easy, as the offset is the same for all of them */
626	for (i = 0; i < timercnt; ++i)	1629	for (i = 1; i <= timercnt; ++i)
627	timers [i]->at += diff;	1630	ev_at (timers [i]) += ev_rt_now - mn_now;
628	}	1631	}
629		1632
630	now = ev_now;	1633	mn_now = ev_rt_now;
631	}	1634	}
632	}	1635	}
633		1636
634	int ev_loop_done;	1637	void
		1638	ev_ref (EV_P)
		1639	{
		1640	++activecnt;
		1641	}
635		1642
		1643	void
		1644	ev_unref (EV_P)
		1645	{
		1646	--activecnt;
		1647	}
		1648
		1649	static int loop_done;
		1650
		1651	void
636	void ev_loop (int flags)	1652	ev_loop (EV_P_ int flags)
637	{	1653	{
638	double block;	1654	loop_done = EVUNLOOP_CANCEL;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1655
		1656	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
640		1657
641	do	1658	do
642	{	1659	{
		1660	#ifndef _WIN32
		1661	if (expect_false (curpid)) /* penalise the forking check even more */
		1662	if (expect_false (getpid () != curpid))
		1663	{
		1664	curpid = getpid ();
		1665	postfork = 1;
		1666	}
		1667	#endif
		1668
		1669	#if EV_FORK_ENABLE
		1670	/* we might have forked, so queue fork handlers */
		1671	if (expect_false (postfork))
		1672	if (forkcnt)
		1673	{
		1674	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1675	call_pending (EV_A);
		1676	}
		1677	#endif
		1678
643	/* queue check watchers (and execute them) */	1679	/* queue prepare watchers (and execute them) */
644	if (preparecnt)	1680	if (expect_false (preparecnt))
645	{	1681	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1682	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	1683	call_pending (EV_A);
648	}	1684	}
649		1685
		1686	if (expect_false (!activecnt))
		1687	break;
		1688
		1689	/* we might have forked, so reify kernel state if necessary */
		1690	if (expect_false (postfork))
		1691	loop_fork (EV_A);
		1692
650	/* update fd-related kernel structures */	1693	/* update fd-related kernel structures */
651	fd_reify ();	1694	fd_reify (EV_A);
652		1695
653	/* calculate blocking time */	1696	/* calculate blocking time */
		1697	{
		1698	ev_tstamp waittime = 0.;
		1699	ev_tstamp sleeptime = 0.;
654		1700
655	/* we only need this for !monotonic clockor timers, but as we basically	1701	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
656	always have timers, we just calculate it always */
657	ev_now = ev_time ();
658
659	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;
661	else
662	{	1702	{
		1703	/* update time to cancel out callback processing overhead */
		1704	time_update (EV_A_ 1e100);
		1705
663	block = MAX_BLOCKTIME;	1706	waittime = MAX_BLOCKTIME;
664		1707
665	if (timercnt)	1708	if (timercnt)
666	{	1709	{
667	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1710	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
668	if (block > to) block = to;	1711	if (waittime > to) waittime = to;
669	}	1712	}
670		1713
		1714	#if EV_PERIODIC_ENABLE
671	if (periodiccnt)	1715	if (periodiccnt)
672	{	1716	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1717	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
674	if (block > to) block = to;	1718	if (waittime > to) waittime = to;
675	}	1719	}
		1720	#endif
676		1721
677	if (block < 0.) block = 0.;	1722	if (expect_false (waittime < timeout_blocktime))
		1723	waittime = timeout_blocktime;
		1724
		1725	sleeptime = waittime - backend_fudge;
		1726
		1727	if (expect_true (sleeptime > io_blocktime))
		1728	sleeptime = io_blocktime;
		1729
		1730	if (sleeptime)
		1731	{
		1732	ev_sleep (sleeptime);
		1733	waittime -= sleeptime;
		1734	}
678	}	1735	}
679		1736
680	method_poll (block);	1737	++loop_count;
		1738	backend_poll (EV_A_ waittime);
681		1739
682	/* update ev_now, do magic */	1740	/* update ev_rt_now, do magic */
683	time_update ();	1741	time_update (EV_A_ waittime + sleeptime);
		1742	}
684		1743
685	/* queue pending timers and reschedule them */	1744	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1745	timers_reify (EV_A); /* relative timers called last */
		1746	#if EV_PERIODIC_ENABLE
687	periodics_reify (); /* absolute timers called first */	1747	periodics_reify (EV_A); /* absolute timers called first */
		1748	#endif
688		1749
		1750	#if EV_IDLE_ENABLE
689	/* queue idle watchers unless io or timers are pending */	1751	/* queue idle watchers unless other events are pending */
690	if (!pendingcnt)	1752	idle_reify (EV_A);
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1753	#endif
692		1754
693	/* queue check watchers, to be executed first */	1755	/* queue check watchers, to be executed first */
694	if (checkcnt)	1756	if (expect_false (checkcnt))
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1757	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1758
697	call_pending ();	1759	call_pending (EV_A);
698	}	1760	}
699	while (!ev_loop_done);	1761	while (expect_true (
		1762	activecnt
		1763	&& !loop_done
		1764	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1765	));
700		1766
701	if (ev_loop_done != 2)	1767	if (loop_done == EVUNLOOP_ONE)
		1768	loop_done = EVUNLOOP_CANCEL;
		1769	}
		1770
		1771	void
		1772	ev_unloop (EV_P_ int how)
		1773	{
702	ev_loop_done = 0;	1774	loop_done = how;
703	}	1775	}
704		1776
705	/*****************************************************************************/	1777	/*****************************************************************************/
706		1778
707	static void	1779	void inline_size
708	wlist_add (WL *head, WL elem)	1780	wlist_add (WL *head, WL elem)
709	{	1781	{
710	elem->next = *head;	1782	elem->next = *head;
711	*head = elem;	1783	*head = elem;
712	}	1784	}
713		1785
714	static void	1786	void inline_size
715	wlist_del (WL *head, WL elem)	1787	wlist_del (WL *head, WL elem)
716	{	1788	{
717	while (*head)	1789	while (*head)
718	{	1790	{
719	if (*head == elem)	1791	if (*head == elem)
…		…
724		1796
725	head = &(*head)->next;	1797	head = &(*head)->next;
726	}	1798	}
727	}	1799	}
728		1800
729	static void	1801	void inline_speed
730	ev_clear (W w)	1802	clear_pending (EV_P_ W w)
731	{	1803	{
732	if (w->pending)	1804	if (w->pending)
733	{	1805	{
734	pendings [w->pending - 1].w = 0;	1806	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1807	w->pending = 0;
736	}	1808	}
737	}	1809	}
738		1810
739	static void	1811	int
		1812	ev_clear_pending (EV_P_ void *w)
		1813	{
		1814	W w_ = (W)w;
		1815	int pending = w_->pending;
		1816
		1817	if (expect_true (pending))
		1818	{
		1819	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1820	w_->pending = 0;
		1821	p->w = 0;
		1822	return p->events;
		1823	}
		1824	else
		1825	return 0;
		1826	}
		1827
		1828	void inline_size
		1829	pri_adjust (EV_P_ W w)
		1830	{
		1831	int pri = w->priority;
		1832	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1833	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1834	w->priority = pri;
		1835	}
		1836
		1837	void inline_speed
740	ev_start (W w, int active)	1838	ev_start (EV_P_ W w, int active)
741	{	1839	{
		1840	pri_adjust (EV_A_ w);
742	w->active = active;	1841	w->active = active;
		1842	ev_ref (EV_A);
743	}	1843	}
744		1844
745	static void	1845	void inline_size
746	ev_stop (W w)	1846	ev_stop (EV_P_ W w)
747	{	1847	{
		1848	ev_unref (EV_A);
748	w->active = 0;	1849	w->active = 0;
749	}	1850	}
750		1851
751	/*****************************************************************************/	1852	/*****************************************************************************/
752		1853
753	void	1854	void noinline
754	ev_io_start (struct ev_io *w)	1855	ev_io_start (EV_P_ ev_io *w)
755	{	1856	{
756	if (ev_is_active (w))
757	return;
758
759	int fd = w->fd;	1857	int fd = w->fd;
760		1858
		1859	if (expect_false (ev_is_active (w)))
		1860	return;
		1861
		1862	assert (("ev_io_start called with negative fd", fd >= 0));
		1863
761	ev_start ((W)w, 1);	1864	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1865	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1866	wlist_add (&anfds[fd].head, (WL)w);
764		1867
765	fd_change (fd);	1868	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1869	w->events &= ~EV_IOFDSET;
766	}	1870	}
767		1871
768	void	1872	void noinline
769	ev_io_stop (struct ev_io *w)	1873	ev_io_stop (EV_P_ ev_io *w)
770	{	1874	{
771	ev_clear ((W)w);	1875	clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1876	if (expect_false (!ev_is_active (w)))
773	return;	1877	return;
774		1878
		1879	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1880
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1881	wlist_del (&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1882	ev_stop (EV_A_ (W)w);
777		1883
778	fd_change (w->fd);	1884	fd_change (EV_A_ w->fd, 1);
779	}	1885	}
780		1886
781	void	1887	void noinline
782	ev_timer_start (struct ev_timer *w)	1888	ev_timer_start (EV_P_ ev_timer *w)
783	{	1889	{
784	if (ev_is_active (w))	1890	if (expect_false (ev_is_active (w)))
785	return;	1891	return;
786		1892
787	w->at += now;	1893	ev_at (w) += mn_now;
788		1894
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1895	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1896
791	ev_start ((W)w, ++timercnt);	1897	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1898	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
793	timers [timercnt - 1] = w;	1899	timers [timercnt] = (WT)w;
794	upheap ((WT *)timers, timercnt - 1);	1900	upheap (timers, timercnt);
795	}
796		1901
797	void	1902	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		1903	}
		1904
		1905	void noinline
798	ev_timer_stop (struct ev_timer *w)	1906	ev_timer_stop (EV_P_ ev_timer *w)
799	{	1907	{
800	ev_clear ((W)w);	1908	clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1909	if (expect_false (!ev_is_active (w)))
802	return;	1910	return;
803		1911
804	if (w->active < timercnt--)	1912	{
		1913	int active = ev_active (w);
		1914
		1915	assert (("internal timer heap corruption", timers [active] == (WT)w));
		1916
		1917	if (expect_true (active < timercnt))
805	{	1918	{
806	timers [w->active - 1] = timers [timercnt];	1919	timers [active] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1920	adjustheap (timers, timercnt, active);
808	}	1921	}
809		1922
810	w->at = w->repeat;	1923	--timercnt;
		1924	}
811		1925
		1926	ev_at (w) -= mn_now;
		1927
812	ev_stop ((W)w);	1928	ev_stop (EV_A_ (W)w);
813	}	1929	}
814		1930
815	void	1931	void noinline
816	ev_timer_again (struct ev_timer *w)	1932	ev_timer_again (EV_P_ ev_timer *w)
817	{	1933	{
818	if (ev_is_active (w))	1934	if (ev_is_active (w))
819	{	1935	{
820	if (w->repeat)	1936	if (w->repeat)
821	{	1937	{
822	w->at = now + w->repeat;	1938	ev_at (w) = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1939	adjustheap (timers, timercnt, ev_active (w));
824	}	1940	}
825	else	1941	else
826	ev_timer_stop (w);	1942	ev_timer_stop (EV_A_ w);
827	}	1943	}
828	else if (w->repeat)	1944	else if (w->repeat)
		1945	{
		1946	ev_at (w) = w->repeat;
829	ev_timer_start (w);	1947	ev_timer_start (EV_A_ w);
		1948	}
830	}	1949	}
831		1950
832	void	1951	#if EV_PERIODIC_ENABLE
		1952	void noinline
833	ev_periodic_start (struct ev_periodic *w)	1953	ev_periodic_start (EV_P_ ev_periodic *w)
834	{	1954	{
835	if (ev_is_active (w))	1955	if (expect_false (ev_is_active (w)))
836	return;	1956	return;
837		1957
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1958	if (w->reschedule_cb)
839		1959	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1960	else if (w->interval)
		1961	{
		1962	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1963	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1964	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1965	}
		1966	else
		1967	ev_at (w) = w->offset;
843		1968
844	ev_start ((W)w, ++periodiccnt);	1969	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1970	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
846	periodics [periodiccnt - 1] = w;	1971	periodics [periodiccnt] = (WT)w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1972	upheap (periodics, periodiccnt);
848	}
849		1973
850	void	1974	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
		1975	}
		1976
		1977	void noinline
851	ev_periodic_stop (struct ev_periodic *w)	1978	ev_periodic_stop (EV_P_ ev_periodic *w)
852	{	1979	{
853	ev_clear ((W)w);	1980	clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1981	if (expect_false (!ev_is_active (w)))
855	return;	1982	return;
856		1983
857	if (w->active < periodiccnt--)	1984	{
		1985	int active = ev_active (w);
		1986
		1987	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		1988
		1989	if (expect_true (active < periodiccnt))
858	{	1990	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1991	periodics [active] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1992	adjustheap (periodics, periodiccnt, active);
861	}	1993	}
862		1994
		1995	--periodiccnt;
		1996	}
		1997
863	ev_stop ((W)w);	1998	ev_stop (EV_A_ (W)w);
864	}	1999	}
865		2000
866	void	2001	void noinline
		2002	ev_periodic_again (EV_P_ ev_periodic *w)
		2003	{
		2004	/* TODO: use adjustheap and recalculation */
		2005	ev_periodic_stop (EV_A_ w);
		2006	ev_periodic_start (EV_A_ w);
		2007	}
		2008	#endif
		2009
		2010	#ifndef SA_RESTART
		2011	# define SA_RESTART 0
		2012	#endif
		2013
		2014	void noinline
867	ev_signal_start (struct ev_signal *w)	2015	ev_signal_start (EV_P_ ev_signal *w)
868	{	2016	{
		2017	#if EV_MULTIPLICITY
		2018	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2019	#endif
869	if (ev_is_active (w))	2020	if (expect_false (ev_is_active (w)))
870	return;	2021	return;
871		2022
872	ev_start ((W)w, 1);	2023	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2024
		2025	evpipe_init (EV_A);
		2026
		2027	{
		2028	#ifndef _WIN32
		2029	sigset_t full, prev;
		2030	sigfillset (&full);
		2031	sigprocmask (SIG_SETMASK, &full, &prev);
		2032	#endif
		2033
873	array_needsize (signals, signalmax, w->signum, signals_init);	2034	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2035
		2036	#ifndef _WIN32
		2037	sigprocmask (SIG_SETMASK, &prev, 0);
		2038	#endif
		2039	}
		2040
		2041	ev_start (EV_A_ (W)w, 1);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2042	wlist_add (&signals [w->signum - 1].head, (WL)w);
875		2043
876	if (!w->next)	2044	if (!((WL)w)->next)
877	{	2045	{
		2046	#if _WIN32
		2047	signal (w->signum, ev_sighandler);
		2048	#else
878	struct sigaction sa;	2049	struct sigaction sa;
879	sa.sa_handler = sighandler;	2050	sa.sa_handler = ev_sighandler;
880	sigfillset (&sa.sa_mask);	2051	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	2052	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	2053	sigaction (w->signum, &sa, 0);
		2054	#endif
883	}	2055	}
884	}	2056	}
885		2057
886	void	2058	void noinline
887	ev_signal_stop (struct ev_signal *w)	2059	ev_signal_stop (EV_P_ ev_signal *w)
888	{	2060	{
889	ev_clear ((W)w);	2061	clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	2062	if (expect_false (!ev_is_active (w)))
891	return;	2063	return;
892		2064
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2065	wlist_del (&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	2066	ev_stop (EV_A_ (W)w);
895		2067
896	if (!signals [w->signum - 1].head)	2068	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	2069	signal (w->signum, SIG_DFL);
898	}	2070	}
899		2071
900	void	2072	void
901	ev_idle_start (struct ev_idle *w)	2073	ev_child_start (EV_P_ ev_child *w)
902	{	2074	{
		2075	#if EV_MULTIPLICITY
		2076	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2077	#endif
903	if (ev_is_active (w))	2078	if (expect_false (ev_is_active (w)))
904	return;	2079	return;
905		2080
906	ev_start ((W)w, ++idlecnt);	2081	ev_start (EV_A_ (W)w, 1);
907	array_needsize (idles, idlemax, idlecnt, );	2082	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
908	idles [idlecnt - 1] = w;
909	}	2083	}
910		2084
911	void	2085	void
912	ev_idle_stop (struct ev_idle *w)	2086	ev_child_stop (EV_P_ ev_child *w)
913	{	2087	{
914	ev_clear ((W)w);	2088	clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	2089	if (expect_false (!ev_is_active (w)))
916	return;	2090	return;
917		2091
918	idles [w->active - 1] = idles [--idlecnt];	2092	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
919	ev_stop ((W)w);	2093	ev_stop (EV_A_ (W)w);
920	}	2094	}
921		2095
		2096	#if EV_STAT_ENABLE
		2097
		2098	# ifdef _WIN32
		2099	# undef lstat
		2100	# define lstat(a,b) _stati64 (a,b)
		2101	# endif
		2102
		2103	#define DEF_STAT_INTERVAL 5.0074891
		2104	#define MIN_STAT_INTERVAL 0.1074891
		2105
		2106	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2107
		2108	#if EV_USE_INOTIFY
		2109	# define EV_INOTIFY_BUFSIZE 8192
		2110
		2111	static void noinline
		2112	infy_add (EV_P_ ev_stat *w)
		2113	{
		2114	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);
		2115
		2116	if (w->wd < 0)
		2117	{
		2118	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2119
		2120	/* monitor some parent directory for speedup hints */
		2121	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2122	/* but an efficiency issue only */
		2123	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2124	{
		2125	char path [4096];
		2126	strcpy (path, w->path);
		2127
		2128	do
		2129	{
		2130	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2131	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2132
		2133	char *pend = strrchr (path, '/');
		2134
		2135	if (!pend)
		2136	break; /* whoops, no '/', complain to your admin */
		2137
		2138	*pend = 0;
		2139	w->wd = inotify_add_watch (fs_fd, path, mask);
		2140	}
		2141	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2142	}
		2143	}
		2144	else
		2145	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2146
		2147	if (w->wd >= 0)
		2148	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2149	}
		2150
		2151	static void noinline
		2152	infy_del (EV_P_ ev_stat *w)
		2153	{
		2154	int slot;
		2155	int wd = w->wd;
		2156
		2157	if (wd < 0)
		2158	return;
		2159
		2160	w->wd = -2;
		2161	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2162	wlist_del (&fs_hash [slot].head, (WL)w);
		2163
		2164	/* remove this watcher, if others are watching it, they will rearm */
		2165	inotify_rm_watch (fs_fd, wd);
		2166	}
		2167
		2168	static void noinline
		2169	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2170	{
		2171	if (slot < 0)
		2172	/* overflow, need to check for all hahs slots */
		2173	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2174	infy_wd (EV_A_ slot, wd, ev);
		2175	else
		2176	{
		2177	WL w_;
		2178
		2179	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2180	{
		2181	ev_stat *w = (ev_stat *)w_;
		2182	w_ = w_->next; /* lets us remove this watcher and all before it */
		2183
		2184	if (w->wd == wd || wd == -1)
		2185	{
		2186	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2187	{
		2188	w->wd = -1;
		2189	infy_add (EV_A_ w); /* re-add, no matter what */
		2190	}
		2191
		2192	stat_timer_cb (EV_A_ &w->timer, 0);
		2193	}
		2194	}
		2195	}
		2196	}
		2197
		2198	static void
		2199	infy_cb (EV_P_ ev_io *w, int revents)
		2200	{
		2201	char buf [EV_INOTIFY_BUFSIZE];
		2202	struct inotify_event *ev = (struct inotify_event *)buf;
		2203	int ofs;
		2204	int len = read (fs_fd, buf, sizeof (buf));
		2205
		2206	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2207	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2208	}
		2209
		2210	void inline_size
		2211	infy_init (EV_P)
		2212	{
		2213	if (fs_fd != -2)
		2214	return;
		2215
		2216	fs_fd = inotify_init ();
		2217
		2218	if (fs_fd >= 0)
		2219	{
		2220	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2221	ev_set_priority (&fs_w, EV_MAXPRI);
		2222	ev_io_start (EV_A_ &fs_w);
		2223	}
		2224	}
		2225
		2226	void inline_size
		2227	infy_fork (EV_P)
		2228	{
		2229	int slot;
		2230
		2231	if (fs_fd < 0)
		2232	return;
		2233
		2234	close (fs_fd);
		2235	fs_fd = inotify_init ();
		2236
		2237	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2238	{
		2239	WL w_ = fs_hash [slot].head;
		2240	fs_hash [slot].head = 0;
		2241
		2242	while (w_)
		2243	{
		2244	ev_stat *w = (ev_stat *)w_;
		2245	w_ = w_->next; /* lets us add this watcher */
		2246
		2247	w->wd = -1;
		2248
		2249	if (fs_fd >= 0)
		2250	infy_add (EV_A_ w); /* re-add, no matter what */
		2251	else
		2252	ev_timer_start (EV_A_ &w->timer);
		2253	}
		2254
		2255	}
		2256	}
		2257
		2258	#endif
		2259
922	void	2260	void
		2261	ev_stat_stat (EV_P_ ev_stat *w)
		2262	{
		2263	if (lstat (w->path, &w->attr) < 0)
		2264	w->attr.st_nlink = 0;
		2265	else if (!w->attr.st_nlink)
		2266	w->attr.st_nlink = 1;
		2267	}
		2268
		2269	static void noinline
		2270	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2271	{
		2272	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2273
		2274	/* we copy this here each the time so that */
		2275	/* prev has the old value when the callback gets invoked */
		2276	w->prev = w->attr;
		2277	ev_stat_stat (EV_A_ w);
		2278
		2279	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2280	if (
		2281	w->prev.st_dev != w->attr.st_dev
		2282	|| w->prev.st_ino != w->attr.st_ino
		2283	|| w->prev.st_mode != w->attr.st_mode
		2284	|| w->prev.st_nlink != w->attr.st_nlink
		2285	|| w->prev.st_uid != w->attr.st_uid
		2286	|| w->prev.st_gid != w->attr.st_gid
		2287	|| w->prev.st_rdev != w->attr.st_rdev
		2288	|| w->prev.st_size != w->attr.st_size
		2289	|| w->prev.st_atime != w->attr.st_atime
		2290	|| w->prev.st_mtime != w->attr.st_mtime
		2291	|| w->prev.st_ctime != w->attr.st_ctime
		2292	) {
		2293	#if EV_USE_INOTIFY
		2294	infy_del (EV_A_ w);
		2295	infy_add (EV_A_ w);
		2296	ev_stat_stat (EV_A_ w); /* avoid race... */
		2297	#endif
		2298
		2299	ev_feed_event (EV_A_ w, EV_STAT);
		2300	}
		2301	}
		2302
		2303	void
		2304	ev_stat_start (EV_P_ ev_stat *w)
		2305	{
		2306	if (expect_false (ev_is_active (w)))
		2307	return;
		2308
		2309	/* since we use memcmp, we need to clear any padding data etc. */
		2310	memset (&w->prev, 0, sizeof (ev_statdata));
		2311	memset (&w->attr, 0, sizeof (ev_statdata));
		2312
		2313	ev_stat_stat (EV_A_ w);
		2314
		2315	if (w->interval < MIN_STAT_INTERVAL)
		2316	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2317
		2318	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2319	ev_set_priority (&w->timer, ev_priority (w));
		2320
		2321	#if EV_USE_INOTIFY
		2322	infy_init (EV_A);
		2323
		2324	if (fs_fd >= 0)
		2325	infy_add (EV_A_ w);
		2326	else
		2327	#endif
		2328	ev_timer_start (EV_A_ &w->timer);
		2329
		2330	ev_start (EV_A_ (W)w, 1);
		2331	}
		2332
		2333	void
		2334	ev_stat_stop (EV_P_ ev_stat *w)
		2335	{
		2336	clear_pending (EV_A_ (W)w);
		2337	if (expect_false (!ev_is_active (w)))
		2338	return;
		2339
		2340	#if EV_USE_INOTIFY
		2341	infy_del (EV_A_ w);
		2342	#endif
		2343	ev_timer_stop (EV_A_ &w->timer);
		2344
		2345	ev_stop (EV_A_ (W)w);
		2346	}
		2347	#endif
		2348
		2349	#if EV_IDLE_ENABLE
		2350	void
		2351	ev_idle_start (EV_P_ ev_idle *w)
		2352	{
		2353	if (expect_false (ev_is_active (w)))
		2354	return;
		2355
		2356	pri_adjust (EV_A_ (W)w);
		2357
		2358	{
		2359	int active = ++idlecnt [ABSPRI (w)];
		2360
		2361	++idleall;
		2362	ev_start (EV_A_ (W)w, active);
		2363
		2364	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2365	idles [ABSPRI (w)][active - 1] = w;
		2366	}
		2367	}
		2368
		2369	void
		2370	ev_idle_stop (EV_P_ ev_idle *w)
		2371	{
		2372	clear_pending (EV_A_ (W)w);
		2373	if (expect_false (!ev_is_active (w)))
		2374	return;
		2375
		2376	{
		2377	int active = ev_active (w);
		2378
		2379	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2380	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2381
		2382	ev_stop (EV_A_ (W)w);
		2383	--idleall;
		2384	}
		2385	}
		2386	#endif
		2387
		2388	void
923	ev_prepare_start (struct ev_prepare *w)	2389	ev_prepare_start (EV_P_ ev_prepare *w)
924	{	2390	{
925	if (ev_is_active (w))	2391	if (expect_false (ev_is_active (w)))
926	return;	2392	return;
927		2393
928	ev_start ((W)w, ++preparecnt);	2394	ev_start (EV_A_ (W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );	2395	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
930	prepares [preparecnt - 1] = w;	2396	prepares [preparecnt - 1] = w;
931	}	2397	}
932		2398
933	void	2399	void
934	ev_prepare_stop (struct ev_prepare *w)	2400	ev_prepare_stop (EV_P_ ev_prepare *w)
935	{	2401	{
936	ev_clear ((W)w);	2402	clear_pending (EV_A_ (W)w);
937	if (ev_is_active (w))	2403	if (expect_false (!ev_is_active (w)))
938	return;	2404	return;
939		2405
		2406	{
		2407	int active = ev_active (w);
		2408
940	prepares [w->active - 1] = prepares [--preparecnt];	2409	prepares [active - 1] = prepares [--preparecnt];
		2410	ev_active (prepares [active - 1]) = active;
		2411	}
		2412
941	ev_stop ((W)w);	2413	ev_stop (EV_A_ (W)w);
942	}	2414	}
943		2415
944	void	2416	void
945	ev_check_start (struct ev_check *w)	2417	ev_check_start (EV_P_ ev_check *w)
946	{	2418	{
947	if (ev_is_active (w))	2419	if (expect_false (ev_is_active (w)))
948	return;	2420	return;
949		2421
950	ev_start ((W)w, ++checkcnt);	2422	ev_start (EV_A_ (W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );	2423	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
952	checks [checkcnt - 1] = w;	2424	checks [checkcnt - 1] = w;
953	}	2425	}
954		2426
955	void	2427	void
956	ev_check_stop (struct ev_check *w)	2428	ev_check_stop (EV_P_ ev_check *w)
957	{	2429	{
958	ev_clear ((W)w);	2430	clear_pending (EV_A_ (W)w);
959	if (ev_is_active (w))	2431	if (expect_false (!ev_is_active (w)))
960	return;	2432	return;
961		2433
		2434	{
		2435	int active = ev_active (w);
		2436
962	checks [w->active - 1] = checks [--checkcnt];	2437	checks [active - 1] = checks [--checkcnt];
		2438	ev_active (checks [active - 1]) = active;
		2439	}
		2440
963	ev_stop ((W)w);	2441	ev_stop (EV_A_ (W)w);
964	}	2442	}
965		2443
966	void	2444	#if EV_EMBED_ENABLE
967	ev_child_start (struct ev_child *w)	2445	void noinline
		2446	ev_embed_sweep (EV_P_ ev_embed *w)
968	{	2447	{
		2448	ev_loop (w->other, EVLOOP_NONBLOCK);
		2449	}
		2450
		2451	static void
		2452	embed_io_cb (EV_P_ ev_io *io, int revents)
		2453	{
		2454	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2455
969	if (ev_is_active (w))	2456	if (ev_cb (w))
970	return;	2457	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2458	else
		2459	ev_loop (w->other, EVLOOP_NONBLOCK);
		2460	}
971		2461
		2462	static void
		2463	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2464	{
		2465	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2466
		2467	{
		2468	struct ev_loop *loop = w->other;
		2469
		2470	while (fdchangecnt)
		2471	{
		2472	fd_reify (EV_A);
		2473	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2474	}
		2475	}
		2476	}
		2477
		2478	#if 0
		2479	static void
		2480	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2481	{
		2482	ev_idle_stop (EV_A_ idle);
		2483	}
		2484	#endif
		2485
		2486	void
		2487	ev_embed_start (EV_P_ ev_embed *w)
		2488	{
		2489	if (expect_false (ev_is_active (w)))
		2490	return;
		2491
		2492	{
		2493	struct ev_loop *loop = w->other;
		2494	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2495	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2496	}
		2497
		2498	ev_set_priority (&w->io, ev_priority (w));
		2499	ev_io_start (EV_A_ &w->io);
		2500
		2501	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2502	ev_set_priority (&w->prepare, EV_MINPRI);
		2503	ev_prepare_start (EV_A_ &w->prepare);
		2504
		2505	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2506
972	ev_start ((W)w, 1);	2507	ev_start (EV_A_ (W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}	2508	}
975		2509
976	void	2510	void
977	ev_child_stop (struct ev_child *w)	2511	ev_embed_stop (EV_P_ ev_embed *w)
978	{	2512	{
979	ev_clear ((W)w);	2513	clear_pending (EV_A_ (W)w);
980	if (ev_is_active (w))	2514	if (expect_false (!ev_is_active (w)))
981	return;	2515	return;
982		2516
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2517	ev_io_stop (EV_A_ &w->io);
		2518	ev_prepare_stop (EV_A_ &w->prepare);
		2519
984	ev_stop ((W)w);	2520	ev_stop (EV_A_ (W)w);
985	}	2521	}
		2522	#endif
		2523
		2524	#if EV_FORK_ENABLE
		2525	void
		2526	ev_fork_start (EV_P_ ev_fork *w)
		2527	{
		2528	if (expect_false (ev_is_active (w)))
		2529	return;
		2530
		2531	ev_start (EV_A_ (W)w, ++forkcnt);
		2532	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2533	forks [forkcnt - 1] = w;
		2534	}
		2535
		2536	void
		2537	ev_fork_stop (EV_P_ ev_fork *w)
		2538	{
		2539	clear_pending (EV_A_ (W)w);
		2540	if (expect_false (!ev_is_active (w)))
		2541	return;
		2542
		2543	{
		2544	int active = ev_active (w);
		2545
		2546	forks [active - 1] = forks [--forkcnt];
		2547	ev_active (forks [active - 1]) = active;
		2548	}
		2549
		2550	ev_stop (EV_A_ (W)w);
		2551	}
		2552	#endif
		2553
		2554	#if EV_ASYNC_ENABLE
		2555	void
		2556	ev_async_start (EV_P_ ev_async *w)
		2557	{
		2558	if (expect_false (ev_is_active (w)))
		2559	return;
		2560
		2561	evpipe_init (EV_A);
		2562
		2563	ev_start (EV_A_ (W)w, ++asynccnt);
		2564	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2565	asyncs [asynccnt - 1] = w;
		2566	}
		2567
		2568	void
		2569	ev_async_stop (EV_P_ ev_async *w)
		2570	{
		2571	clear_pending (EV_A_ (W)w);
		2572	if (expect_false (!ev_is_active (w)))
		2573	return;
		2574
		2575	{
		2576	int active = ev_active (w);
		2577
		2578	asyncs [active - 1] = asyncs [--asynccnt];
		2579	ev_active (asyncs [active - 1]) = active;
		2580	}
		2581
		2582	ev_stop (EV_A_ (W)w);
		2583	}
		2584
		2585	void
		2586	ev_async_send (EV_P_ ev_async *w)
		2587	{
		2588	w->sent = 1;
		2589	evpipe_write (EV_A_ &gotasync);
		2590	}
		2591	#endif
986		2592
987	/*****************************************************************************/	2593	/*****************************************************************************/
988		2594
989	struct ev_once	2595	struct ev_once
990	{	2596	{
991	struct ev_io io;	2597	ev_io io;
992	struct ev_timer to;	2598	ev_timer to;
993	void (*cb)(int revents, void *arg);	2599	void (*cb)(int revents, void *arg);
994	void *arg;	2600	void *arg;
995	};	2601	};
996		2602
997	static void	2603	static void
998	once_cb (struct ev_once *once, int revents)	2604	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	2605	{
1000	void (*cb)(int revents, void *arg) = once->cb;	2606	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	2607	void *arg = once->arg;
1002		2608
1003	ev_io_stop (&once->io);	2609	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	2610	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	2611	ev_free (once);
1006		2612
1007	cb (revents, arg);	2613	cb (revents, arg);
1008	}	2614	}
1009		2615
1010	static void	2616	static void
1011	once_cb_io (struct ev_io *w, int revents)	2617	once_cb_io (EV_P_ ev_io *w, int revents)
1012	{	2618	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2619	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014	}	2620	}
1015		2621
1016	static void	2622	static void
1017	once_cb_to (struct ev_timer *w, int revents)	2623	once_cb_to (EV_P_ ev_timer *w, int revents)
1018	{	2624	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2625	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020	}	2626	}
1021		2627
1022	void	2628	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2629	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024	{	2630	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	2631	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026		2632
1027	if (!once)	2633	if (expect_false (!once))
		2634	{
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2635	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029	else	2636	return;
1030	{	2637	}
		2638
1031	once->cb = cb;	2639	once->cb = cb;
1032	once->arg = arg;	2640	once->arg = arg;
1033		2641
1034	ev_watcher_init (&once->io, once_cb_io);	2642	ev_init (&once->io, once_cb_io);
1035	if (fd >= 0)	2643	if (fd >= 0)
1036	{	2644	{
1037	ev_io_set (&once->io, fd, events);	2645	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	2646	ev_io_start (EV_A_ &once->io);
1039	}	2647	}
1040		2648
1041	ev_watcher_init (&once->to, once_cb_to);	2649	ev_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	2650	if (timeout >= 0.)
1043	{	2651	{
1044	ev_timer_set (&once->to, timeout, 0.);	2652	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	2653	ev_timer_start (EV_A_ &once->to);
1046	}
1047	}
1048	}
1049
1050	/*****************************************************************************/
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{	2654	}
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif
1106
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}	2655	}
1127		2656
		2657	#if EV_MULTIPLICITY
		2658	#include "ev_wrap.h"
1128	#endif	2659	#endif
1129		2660
		2661	#ifdef __cplusplus
		2662	}
		2663	#endif
1130		2664
1131
1132

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