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Comparing libev/ev.c (file contents):
Revision 1.36 by root, Thu Nov 1 13:11:11 2007 UTC vs.
Revision 1.231 by root, Mon May 5 20:47:33 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* 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.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* 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
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
		45	#ifndef EV_STANDALONE
31	#if EV_USE_CONFIG_H	46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
32	# 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
33	#endif	132	#endif
34		133
35	#include <math.h>	134	#include <math.h>
36	#include <stdlib.h>	135	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	136	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	137	#include <stddef.h>
41		138
42	#include <stdio.h>	139	#include <stdio.h>
43		140
44	#include <assert.h>	141	#include <assert.h>
45	#include <errno.h>	142	#include <errno.h>
46	#include <sys/types.h>	143	#include <sys/types.h>
47	#include <sys/wait.h>
48	#include <sys/time.h>
49	#include <time.h>	144	#include <time.h>
50		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
51	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
52	# ifdef CLOCK_MONOTONIC
53	# define EV_USE_MONOTONIC 1	169	# define EV_USE_MONOTONIC 0
54	# 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
55	#endif	178	#endif
56		179
57	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
59	#endif	182	#endif
60		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
61	#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
62	# 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
63	#endif	245	#endif
64		246
65	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
		248	# undef EV_USE_REALTIME
66	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
67	#endif	250	#endif
68	#ifndef EV_USE_REALTIME	251
69	# 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>
70	#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 */
71		294
72	#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) */
73	#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) */
74	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
75	#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 */
76		298
77	#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
78		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
79	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
80	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
81	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
82		329
83	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
84	ev_tstamp ev_now;	450	ev_tstamp ev_rt_now;
85	int ev_method;	451	#define VAR(name,decl) static decl;
		452	#include "ev_vars.h"
		453	#undef VAR
86		454
87	static int have_monotonic; /* runtime */	455	static int ev_default_loop_ptr;
88		456
89	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	457	#endif
90	static void (*method_modify)(int fd, int oev, int nev);
91	static void (*method_poll)(ev_tstamp timeout);
92		458
93	/*****************************************************************************/	459	/*****************************************************************************/
94		460
95	ev_tstamp	461	ev_tstamp
96	ev_time (void)	462	ev_time (void)
…		…
104	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
105	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
106	#endif	472	#endif
107	}	473	}
108		474
109	static ev_tstamp	475	ev_tstamp inline_size
110	get_clock (void)	476	get_clock (void)
111	{	477	{
112	#if EV_USE_MONOTONIC	478	#if EV_USE_MONOTONIC
113	if (have_monotonic)	479	if (expect_true (have_monotonic))
114	{	480	{
115	struct timespec ts;	481	struct timespec ts;
116	clock_gettime (CLOCK_MONOTONIC, &ts);	482	clock_gettime (CLOCK_MONOTONIC, &ts);
117	return ts.tv_sec + ts.tv_nsec * 1e-9;	483	return ts.tv_sec + ts.tv_nsec * 1e-9;
118	}	484	}
119	#endif	485	#endif
120		486
121	return ev_time ();	487	return ev_time ();
122	}	488	}
123		489
124	#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
125		497
126	#define array_needsize(base,cur,cnt,init) \	498	void
127	if ((cnt) > cur) \	499	ev_sleep (ev_tstamp delay)
128	{ \	500	{
129	int newcnt = cur; \	501	if (delay > 0.)
130	do \
131	{ \
132	newcnt = array_roundsize (base, newcnt << 1); \
133	} \
134	while ((cnt) > newcnt); \
135	\
136	base = realloc (base, sizeof (*base) * (newcnt)); \
137	init (base + cur, newcnt - cur); \
138	cur = newcnt; \
139	}	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	}
140		522
141	/*****************************************************************************/	523	/*****************************************************************************/
142		524
143	typedef struct	525	int inline_size
		526	array_nextsize (int elem, int cur, int cnt)
144	{	527	{
145	struct ev_io *head;	528	int ncur = cur + 1;
146	unsigned char events;
147	unsigned char reify;
148	} ANFD;
149		529
150	static ANFD *anfds;	530	do
151	static int anfdmax;	531	ncur <<= 1;
		532	while (cnt > ncur);
152		533
153	static void	534	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		535	if (elem * ncur > 4096)
		536	{
		537	ncur *= elem;
		538	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		539	ncur = ncur - sizeof (void *) * 4;
		540	ncur /= elem;
		541	}
		542
		543	return ncur;
		544	}
		545
		546	static noinline void *
		547	array_realloc (int elem, void *base, int *cur, int cnt)
		548	{
		549	*cur = array_nextsize (elem, *cur, cnt);
		550	return ev_realloc (base, elem * *cur);
		551	}
		552
		553	#define array_needsize(type,base,cur,cnt,init) \
		554	if (expect_false ((cnt) > (cur))) \
		555	{ \
		556	int ocur_ = (cur); \
		557	(base) = (type *)array_realloc \
		558	(sizeof (type), (base), &(cur), (cnt)); \
		559	init ((base) + (ocur_), (cur) - ocur_); \
		560	}
		561
		562	#if 0
		563	#define array_slim(type,stem) \
		564	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		565	{ \
		566	stem ## max = array_roundsize (stem ## cnt >> 1); \
		567	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		568	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		569	}
		570	#endif
		571
		572	#define array_free(stem, idx) \
		573	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		574
		575	/*****************************************************************************/
		576
		577	void noinline
		578	ev_feed_event (EV_P_ void *w, int revents)
		579	{
		580	W w_ = (W)w;
		581	int pri = ABSPRI (w_);
		582
		583	if (expect_false (w_->pending))
		584	pendings [pri][w_->pending - 1].events |= revents;
		585	else
		586	{
		587	w_->pending = ++pendingcnt [pri];
		588	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		589	pendings [pri][w_->pending - 1].w = w_;
		590	pendings [pri][w_->pending - 1].events = revents;
		591	}
		592	}
		593
		594	void inline_speed
		595	queue_events (EV_P_ W *events, int eventcnt, int type)
		596	{
		597	int i;
		598
		599	for (i = 0; i < eventcnt; ++i)
		600	ev_feed_event (EV_A_ events [i], type);
		601	}
		602
		603	/*****************************************************************************/
		604
		605	void inline_size
154	anfds_init (ANFD *base, int count)	606	anfds_init (ANFD *base, int count)
155	{	607	{
156	while (count--)	608	while (count--)
157	{	609	{
158	base->head = 0;	610	base->head = 0;
…		…
161		613
162	++base;	614	++base;
163	}	615	}
164	}	616	}
165		617
166	typedef struct	618	void inline_speed
167	{
168	W w;
169	int events;
170	} ANPENDING;
171
172	static ANPENDING *pendings;
173	static int pendingmax, pendingcnt;
174
175	static void
176	event (W w, int events)
177	{
178	if (w->pending)
179	{
180	pendings [w->pending - 1].events |= events;
181	return;
182	}
183
184	w->pending = ++pendingcnt;
185	array_needsize (pendings, pendingmax, pendingcnt, );
186	pendings [pendingcnt - 1].w = w;
187	pendings [pendingcnt - 1].events = events;
188	}
189
190	static void
191	queue_events (W *events, int eventcnt, int type)
192	{
193	int i;
194
195	for (i = 0; i < eventcnt; ++i)
196	event (events [i], type);
197	}
198
199	static void
200	fd_event (int fd, int events)	619	fd_event (EV_P_ int fd, int revents)
201	{	620	{
202	ANFD *anfd = anfds + fd;	621	ANFD *anfd = anfds + fd;
203	struct ev_io *w;	622	ev_io *w;
204		623
205	for (w = anfd->head; w; w = w->next)	624	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
206	{	625	{
207	int ev = w->events & events;	626	int ev = w->events & revents;
208		627
209	if (ev)	628	if (ev)
210	event ((W)w, ev);	629	ev_feed_event (EV_A_ (W)w, ev);
211	}	630	}
212	}	631	}
213		632
214	/*****************************************************************************/	633	void
		634	ev_feed_fd_event (EV_P_ int fd, int revents)
		635	{
		636	if (fd >= 0 && fd < anfdmax)
		637	fd_event (EV_A_ fd, revents);
		638	}
215		639
216	static int *fdchanges;	640	void inline_size
217	static int fdchangemax, fdchangecnt;	641	fd_reify (EV_P)
218
219	static void
220	fd_reify (void)
221	{	642	{
222	int i;	643	int i;
223		644
224	for (i = 0; i < fdchangecnt; ++i)	645	for (i = 0; i < fdchangecnt; ++i)
225	{	646	{
226	int fd = fdchanges [i];	647	int fd = fdchanges [i];
227	ANFD *anfd = anfds + fd;	648	ANFD *anfd = anfds + fd;
228	struct ev_io *w;	649	ev_io *w;
229		650
230	int events = 0;	651	unsigned char events = 0;
231		652
232	for (w = anfd->head; w; w = w->next)	653	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
233	events |= w->events;	654	events |= (unsigned char)w->events;
234		655
235	anfd->reify = 0;	656	#if EV_SELECT_IS_WINSOCKET
236		657	if (events)
237	if (anfd->events != events)
238	{	658	{
239	method_modify (fd, anfd->events, events);	659	unsigned long argp;
240	anfd->events = events;	660	#ifdef EV_FD_TO_WIN32_HANDLE
		661	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		662	#else
		663	anfd->handle = _get_osfhandle (fd);
		664	#endif
		665	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
241	}	666	}
		667	#endif
		668
		669	{
		670	unsigned char o_events = anfd->events;
		671	unsigned char o_reify = anfd->reify;
		672
		673	anfd->reify = 0;
		674	anfd->events = events;
		675
		676	if (o_events != events || o_reify & EV_IOFDSET)
		677	backend_modify (EV_A_ fd, o_events, events);
		678	}
242	}	679	}
243		680
244	fdchangecnt = 0;	681	fdchangecnt = 0;
245	}	682	}
246		683
247	static void	684	void inline_size
248	fd_change (int fd)	685	fd_change (EV_P_ int fd, int flags)
249	{	686	{
250	if (anfds [fd].reify || fdchangecnt < 0)	687	unsigned char reify = anfds [fd].reify;
251	return;
252
253	anfds [fd].reify = 1;	688	anfds [fd].reify |= flags;
254		689
		690	if (expect_true (!reify))
		691	{
255	++fdchangecnt;	692	++fdchangecnt;
256	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	693	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
257	fdchanges [fdchangecnt - 1] = fd;	694	fdchanges [fdchangecnt - 1] = fd;
		695	}
		696	}
		697
		698	void inline_speed
		699	fd_kill (EV_P_ int fd)
		700	{
		701	ev_io *w;
		702
		703	while ((w = (ev_io *)anfds [fd].head))
		704	{
		705	ev_io_stop (EV_A_ w);
		706	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		707	}
		708	}
		709
		710	int inline_size
		711	fd_valid (int fd)
		712	{
		713	#ifdef _WIN32
		714	return _get_osfhandle (fd) != -1;
		715	#else
		716	return fcntl (fd, F_GETFD) != -1;
		717	#endif
258	}	718	}
259		719
260	/* called on EBADF to verify fds */	720	/* called on EBADF to verify fds */
261	static void	721	static void noinline
262	fd_recheck (void)	722	fd_ebadf (EV_P)
263	{	723	{
264	int fd;	724	int fd;
265		725
266	for (fd = 0; fd < anfdmax; ++fd)	726	for (fd = 0; fd < anfdmax; ++fd)
267	if (anfds [fd].events)	727	if (anfds [fd].events)
268	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	728	if (!fd_valid (fd) == -1 && errno == EBADF)
269	while (anfds [fd].head)	729	fd_kill (EV_A_ fd);
		730	}
		731
		732	/* called on ENOMEM in select/poll to kill some fds and retry */
		733	static void noinline
		734	fd_enomem (EV_P)
		735	{
		736	int fd;
		737
		738	for (fd = anfdmax; fd--; )
		739	if (anfds [fd].events)
270	{	740	{
271	ev_io_stop (anfds [fd].head);	741	fd_kill (EV_A_ fd);
272	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	742	return;
273	}	743	}
		744	}
		745
		746	/* usually called after fork if backend needs to re-arm all fds from scratch */
		747	static void noinline
		748	fd_rearm_all (EV_P)
		749	{
		750	int fd;
		751
		752	for (fd = 0; fd < anfdmax; ++fd)
		753	if (anfds [fd].events)
		754	{
		755	anfds [fd].events = 0;
		756	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		757	}
274	}	758	}
275		759
276	/*****************************************************************************/	760	/*****************************************************************************/
277		761
278	static struct ev_timer **timers;	762	/* towards the root */
279	static int timermax, timercnt;	763	void inline_speed
280
281	static struct ev_periodic **periodics;
282	static int periodicmax, periodiccnt;
283
284	static void
285	upheap (WT *timers, int k)	764	upheap (WT *heap, int k)
286	{	765	{
287	WT w = timers [k];	766	WT w = heap [k];
288		767
289	while (k && timers [k >> 1]->at > w->at)	768	for (;;)
290	{
291	timers [k] = timers [k >> 1];
292	timers [k]->active = k + 1;
293	k >>= 1;
294	}	769	{
295
296	timers [k] = w;
297	timers [k]->active = k + 1;
298
299	}
300
301	static void
302	downheap (WT *timers, int N, int k)
303	{
304	WT w = timers [k];
305
306	while (k < (N >> 1))
307	{
308	int j = k << 1;	770	int p = k >> 1;
309		771
310	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	772	/* maybe we could use a dummy element at heap [0]? */
311	++j;	773	if (!p || heap [p]->at <= w->at)
312
313	if (w->at <= timers [j]->at)
314	break;	774	break;
315		775
316	timers [k] = timers [j];	776	heap [k] = heap [p];
317	timers [k]->active = k + 1;	777	ev_active (heap [k]) = k;
318	k = j;	778	k = p;
		779	}
		780
		781	heap [k] = w;
		782	ev_active (heap [k]) = k;
		783	}
		784
		785	/* away from the root */
		786	void inline_speed
		787	downheap (WT *heap, int N, int k)
		788	{
		789	WT w = heap [k];
		790
		791	for (;;)
319	}	792	{
		793	int c = k << 1;
320		794
		795	if (c > N)
		796	break;
		797
		798	c += c < N && heap [c]->at > heap [c + 1]->at
		799	? 1 : 0;
		800
		801	if (w->at <= heap [c]->at)
		802	break;
		803
		804	heap [k] = heap [c];
		805	ev_active (heap [k]) = k;
		806
		807	k = c;
		808	}
		809
321	timers [k] = w;	810	heap [k] = w;
322	timers [k]->active = k + 1;	811	ev_active (heap [k]) = k;
		812	}
		813
		814	void inline_size
		815	adjustheap (WT *heap, int N, int k)
		816	{
		817	upheap (heap, k);
		818	downheap (heap, N, k);
323	}	819	}
324		820
325	/*****************************************************************************/	821	/*****************************************************************************/
326		822
327	typedef struct	823	typedef struct
328	{	824	{
329	struct ev_signal *head;	825	WL head;
330	sig_atomic_t volatile gotsig;	826	EV_ATOMIC_T gotsig;
331	} ANSIG;	827	} ANSIG;
332		828
333	static ANSIG *signals;	829	static ANSIG *signals;
334	static int signalmax;	830	static int signalmax;
335		831
336	static int sigpipe [2];	832	static EV_ATOMIC_T gotsig;
337	static sig_atomic_t volatile gotsig;
338	static struct ev_io sigev;
339		833
340	static void	834	void inline_size
341	signals_init (ANSIG *base, int count)	835	signals_init (ANSIG *base, int count)
342	{	836	{
343	while (count--)	837	while (count--)
344	{	838	{
345	base->head = 0;	839	base->head = 0;
…		…
347		841
348	++base;	842	++base;
349	}	843	}
350	}	844	}
351		845
		846	/*****************************************************************************/
		847
		848	void inline_speed
		849	fd_intern (int fd)
		850	{
		851	#ifdef _WIN32
		852	int arg = 1;
		853	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		854	#else
		855	fcntl (fd, F_SETFD, FD_CLOEXEC);
		856	fcntl (fd, F_SETFL, O_NONBLOCK);
		857	#endif
		858	}
		859
		860	static void noinline
		861	evpipe_init (EV_P)
		862	{
		863	if (!ev_is_active (&pipeev))
		864	{
		865	#if EV_USE_EVENTFD
		866	if ((evfd = eventfd (0, 0)) >= 0)
		867	{
		868	evpipe [0] = -1;
		869	fd_intern (evfd);
		870	ev_io_set (&pipeev, evfd, EV_READ);
		871	}
		872	else
		873	#endif
		874	{
		875	while (pipe (evpipe))
		876	syserr ("(libev) error creating signal/async pipe");
		877
		878	fd_intern (evpipe [0]);
		879	fd_intern (evpipe [1]);
		880	ev_io_set (&pipeev, evpipe [0], EV_READ);
		881	}
		882
		883	ev_io_start (EV_A_ &pipeev);
		884	ev_unref (EV_A); /* watcher should not keep loop alive */
		885	}
		886	}
		887
		888	void inline_size
		889	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		890	{
		891	if (!*flag)
		892	{
		893	int old_errno = errno; /* save errno because write might clobber it */
		894
		895	*flag = 1;
		896
		897	#if EV_USE_EVENTFD
		898	if (evfd >= 0)
		899	{
		900	uint64_t counter = 1;
		901	write (evfd, &counter, sizeof (uint64_t));
		902	}
		903	else
		904	#endif
		905	write (evpipe [1], &old_errno, 1);
		906
		907	errno = old_errno;
		908	}
		909	}
		910
352	static void	911	static void
		912	pipecb (EV_P_ ev_io *iow, int revents)
		913	{
		914	#if EV_USE_EVENTFD
		915	if (evfd >= 0)
		916	{
		917	uint64_t counter = 1;
		918	read (evfd, &counter, sizeof (uint64_t));
		919	}
		920	else
		921	#endif
		922	{
		923	char dummy;
		924	read (evpipe [0], &dummy, 1);
		925	}
		926
		927	if (gotsig && ev_is_default_loop (EV_A))
		928	{
		929	int signum;
		930	gotsig = 0;
		931
		932	for (signum = signalmax; signum--; )
		933	if (signals [signum].gotsig)
		934	ev_feed_signal_event (EV_A_ signum + 1);
		935	}
		936
		937	#if EV_ASYNC_ENABLE
		938	if (gotasync)
		939	{
		940	int i;
		941	gotasync = 0;
		942
		943	for (i = asynccnt; i--; )
		944	if (asyncs [i]->sent)
		945	{
		946	asyncs [i]->sent = 0;
		947	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		948	}
		949	}
		950	#endif
		951	}
		952
		953	/*****************************************************************************/
		954
		955	static void
353	sighandler (int signum)	956	ev_sighandler (int signum)
354	{	957	{
		958	#if EV_MULTIPLICITY
		959	struct ev_loop *loop = &default_loop_struct;
		960	#endif
		961
		962	#if _WIN32
		963	signal (signum, ev_sighandler);
		964	#endif
		965
355	signals [signum - 1].gotsig = 1;	966	signals [signum - 1].gotsig = 1;
356		967	evpipe_write (EV_A_ &gotsig);
357	if (!gotsig)
358	{
359	gotsig = 1;
360	write (sigpipe [1], &signum, 1);
361	}
362	}	968	}
363		969
364	static void	970	void noinline
365	sigcb (struct ev_io *iow, int revents)	971	ev_feed_signal_event (EV_P_ int signum)
366	{	972	{
367	struct ev_signal *w;	973	WL w;
368	int sig;
369		974
370	read (sigpipe [0], &revents, 1);	975	#if EV_MULTIPLICITY
371	gotsig = 0;	976	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		977	#endif
372		978
373	for (sig = signalmax; sig--; )	979	--signum;
374	if (signals [sig].gotsig)	980
375	{	981	if (signum < 0 || signum >= signalmax)
		982	return;
		983
376	signals [sig].gotsig = 0;	984	signals [signum].gotsig = 0;
377		985
378	for (w = signals [sig].head; w; w = w->next)	986	for (w = signals [signum].head; w; w = w->next)
379	event ((W)w, EV_SIGNAL);	987	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
380	}
381	}
382
383	static void
384	siginit (void)
385	{
386	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
387	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
388
389	/* rather than sort out wether we really need nb, set it */
390	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
391	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
392
393	ev_io_set (&sigev, sigpipe [0], EV_READ);
394	ev_io_start (&sigev);
395	}	988	}
396		989
397	/*****************************************************************************/	990	/*****************************************************************************/
398		991
399	static struct ev_idle **idles;	992	static WL childs [EV_PID_HASHSIZE];
400	static int idlemax, idlecnt;
401		993
402	static struct ev_prepare **prepares;	994	#ifndef _WIN32
403	static int preparemax, preparecnt;
404		995
405	static struct ev_check **checks;
406	static int checkmax, checkcnt;
407
408	/*****************************************************************************/
409
410	static struct ev_child *childs [PID_HASHSIZE];
411	static struct ev_signal childev;	996	static ev_signal childev;
		997
		998	#ifndef WIFCONTINUED
		999	# define WIFCONTINUED(status) 0
		1000	#endif
		1001
		1002	void inline_speed
		1003	child_reap (EV_P_ int chain, int pid, int status)
		1004	{
		1005	ev_child *w;
		1006	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1007
		1008	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1009	{
		1010	if ((w->pid == pid || !w->pid)
		1011	&& (!traced || (w->flags & 1)))
		1012	{
		1013	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1014	w->rpid = pid;
		1015	w->rstatus = status;
		1016	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1017	}
		1018	}
		1019	}
412		1020
413	#ifndef WCONTINUED	1021	#ifndef WCONTINUED
414	# define WCONTINUED 0	1022	# define WCONTINUED 0
415	#endif	1023	#endif
416		1024
417	static void	1025	static void
418	childcb (struct ev_signal *sw, int revents)	1026	childcb (EV_P_ ev_signal *sw, int revents)
419	{	1027	{
420	struct ev_child *w;
421	int pid, status;	1028	int pid, status;
422		1029
		1030	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
423	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	1031	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
424	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	1032	if (!WCONTINUED
425	if (w->pid == pid || w->pid == -1)	1033	|| errno != EINVAL
426	{	1034	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
427	w->status = status;	1035	return;
428	event ((W)w, EV_CHILD);	1036
429	}	1037	/* make sure we are called again until all children have been reaped */
		1038	/* we need to do it this way so that the callback gets called before we continue */
		1039	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1040
		1041	child_reap (EV_A_ pid, pid, status);
		1042	if (EV_PID_HASHSIZE > 1)
		1043	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
430	}	1044	}
		1045
		1046	#endif
431		1047
432	/*****************************************************************************/	1048	/*****************************************************************************/
433		1049
		1050	#if EV_USE_PORT
		1051	# include "ev_port.c"
		1052	#endif
		1053	#if EV_USE_KQUEUE
		1054	# include "ev_kqueue.c"
		1055	#endif
434	#if EV_USE_EPOLL	1056	#if EV_USE_EPOLL
435	# include "ev_epoll.c"	1057	# include "ev_epoll.c"
436	#endif	1058	#endif
		1059	#if EV_USE_POLL
		1060	# include "ev_poll.c"
		1061	#endif
437	#if EV_USE_SELECT	1062	#if EV_USE_SELECT
438	# include "ev_select.c"	1063	# include "ev_select.c"
439	#endif	1064	#endif
440		1065
441	int	1066	int
…		…
448	ev_version_minor (void)	1073	ev_version_minor (void)
449	{	1074	{
450	return EV_VERSION_MINOR;	1075	return EV_VERSION_MINOR;
451	}	1076	}
452		1077
453	int ev_init (int flags)	1078	/* return true if we are running with elevated privileges and should ignore env variables */
		1079	int inline_size
		1080	enable_secure (void)
454	{	1081	{
455	if (!ev_method)	1082	#ifdef _WIN32
		1083	return 0;
		1084	#else
		1085	return getuid () != geteuid ()
		1086	|| getgid () != getegid ();
		1087	#endif
		1088	}
		1089
		1090	unsigned int
		1091	ev_supported_backends (void)
		1092	{
		1093	unsigned int flags = 0;
		1094
		1095	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1096	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1097	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1098	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1099	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1100
		1101	return flags;
		1102	}
		1103
		1104	unsigned int
		1105	ev_recommended_backends (void)
		1106	{
		1107	unsigned int flags = ev_supported_backends ();
		1108
		1109	#ifndef __NetBSD__
		1110	/* kqueue is borked on everything but netbsd apparently */
		1111	/* it usually doesn't work correctly on anything but sockets and pipes */
		1112	flags &= ~EVBACKEND_KQUEUE;
		1113	#endif
		1114	#ifdef __APPLE__
		1115	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1116	flags &= ~EVBACKEND_POLL;
		1117	#endif
		1118
		1119	return flags;
		1120	}
		1121
		1122	unsigned int
		1123	ev_embeddable_backends (void)
		1124	{
		1125	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1126
		1127	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1128	/* please fix it and tell me how to detect the fix */
		1129	flags &= ~EVBACKEND_EPOLL;
		1130
		1131	return flags;
		1132	}
		1133
		1134	unsigned int
		1135	ev_backend (EV_P)
		1136	{
		1137	return backend;
		1138	}
		1139
		1140	unsigned int
		1141	ev_loop_count (EV_P)
		1142	{
		1143	return loop_count;
		1144	}
		1145
		1146	void
		1147	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1148	{
		1149	io_blocktime = interval;
		1150	}
		1151
		1152	void
		1153	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1154	{
		1155	timeout_blocktime = interval;
		1156	}
		1157
		1158	static void noinline
		1159	loop_init (EV_P_ unsigned int flags)
		1160	{
		1161	if (!backend)
456	{	1162	{
457	#if EV_USE_MONOTONIC	1163	#if EV_USE_MONOTONIC
458	{	1164	{
459	struct timespec ts;	1165	struct timespec ts;
460	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1166	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
461	have_monotonic = 1;	1167	have_monotonic = 1;
462	}	1168	}
463	#endif	1169	#endif
464		1170
465	ev_now = ev_time ();	1171	ev_rt_now = ev_time ();
466	now = get_clock ();	1172	mn_now = get_clock ();
		1173	now_floor = mn_now;
467	diff = ev_now - now;	1174	rtmn_diff = ev_rt_now - mn_now;
468		1175
469	if (pipe (sigpipe))	1176	io_blocktime = 0.;
470	return 0;	1177	timeout_blocktime = 0.;
		1178	backend = 0;
		1179	backend_fd = -1;
		1180	gotasync = 0;
		1181	#if EV_USE_INOTIFY
		1182	fs_fd = -2;
		1183	#endif
471		1184
472	ev_method = EVMETHOD_NONE;	1185	/* pid check not overridable via env */
		1186	#ifndef _WIN32
		1187	if (flags & EVFLAG_FORKCHECK)
		1188	curpid = getpid ();
		1189	#endif
		1190
		1191	if (!(flags & EVFLAG_NOENV)
		1192	&& !enable_secure ()
		1193	&& getenv ("LIBEV_FLAGS"))
		1194	flags = atoi (getenv ("LIBEV_FLAGS"));
		1195
		1196	if (!(flags & 0x0000ffffU))
		1197	flags |= ev_recommended_backends ();
		1198
		1199	#if EV_USE_PORT
		1200	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1201	#endif
		1202	#if EV_USE_KQUEUE
		1203	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1204	#endif
473	#if EV_USE_EPOLL	1205	#if EV_USE_EPOLL
474	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	1206	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1207	#endif
		1208	#if EV_USE_POLL
		1209	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
475	#endif	1210	#endif
476	#if EV_USE_SELECT	1211	#if EV_USE_SELECT
477	if (ev_method == EVMETHOD_NONE) select_init (flags);	1212	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
478	#endif	1213	#endif
479		1214
480	if (ev_method)	1215	ev_init (&pipeev, pipecb);
		1216	ev_set_priority (&pipeev, EV_MAXPRI);
		1217	}
		1218	}
		1219
		1220	static void noinline
		1221	loop_destroy (EV_P)
		1222	{
		1223	int i;
		1224
		1225	if (ev_is_active (&pipeev))
		1226	{
		1227	ev_ref (EV_A); /* signal watcher */
		1228	ev_io_stop (EV_A_ &pipeev);
		1229
		1230	#if EV_USE_EVENTFD
		1231	if (evfd >= 0)
		1232	close (evfd);
		1233	#endif
		1234
		1235	if (evpipe [0] >= 0)
481	{	1236	{
482	ev_watcher_init (&sigev, sigcb);	1237	close (evpipe [0]);
483	siginit ();	1238	close (evpipe [1]);
		1239	}
		1240	}
484		1241
		1242	#if EV_USE_INOTIFY
		1243	if (fs_fd >= 0)
		1244	close (fs_fd);
		1245	#endif
		1246
		1247	if (backend_fd >= 0)
		1248	close (backend_fd);
		1249
		1250	#if EV_USE_PORT
		1251	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1252	#endif
		1253	#if EV_USE_KQUEUE
		1254	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1255	#endif
		1256	#if EV_USE_EPOLL
		1257	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1258	#endif
		1259	#if EV_USE_POLL
		1260	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1261	#endif
		1262	#if EV_USE_SELECT
		1263	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1264	#endif
		1265
		1266	for (i = NUMPRI; i--; )
		1267	{
		1268	array_free (pending, [i]);
		1269	#if EV_IDLE_ENABLE
		1270	array_free (idle, [i]);
		1271	#endif
		1272	}
		1273
		1274	ev_free (anfds); anfdmax = 0;
		1275
		1276	/* have to use the microsoft-never-gets-it-right macro */
		1277	array_free (fdchange, EMPTY);
		1278	array_free (timer, EMPTY);
		1279	#if EV_PERIODIC_ENABLE
		1280	array_free (periodic, EMPTY);
		1281	#endif
		1282	#if EV_FORK_ENABLE
		1283	array_free (fork, EMPTY);
		1284	#endif
		1285	array_free (prepare, EMPTY);
		1286	array_free (check, EMPTY);
		1287	#if EV_ASYNC_ENABLE
		1288	array_free (async, EMPTY);
		1289	#endif
		1290
		1291	backend = 0;
		1292	}
		1293
		1294	#if EV_USE_INOTIFY
		1295	void inline_size infy_fork (EV_P);
		1296	#endif
		1297
		1298	void inline_size
		1299	loop_fork (EV_P)
		1300	{
		1301	#if EV_USE_PORT
		1302	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1303	#endif
		1304	#if EV_USE_KQUEUE
		1305	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1306	#endif
		1307	#if EV_USE_EPOLL
		1308	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1309	#endif
		1310	#if EV_USE_INOTIFY
		1311	infy_fork (EV_A);
		1312	#endif
		1313
		1314	if (ev_is_active (&pipeev))
		1315	{
		1316	/* this "locks" the handlers against writing to the pipe */
		1317	/* while we modify the fd vars */
		1318	gotsig = 1;
		1319	#if EV_ASYNC_ENABLE
		1320	gotasync = 1;
		1321	#endif
		1322
		1323	ev_ref (EV_A);
		1324	ev_io_stop (EV_A_ &pipeev);
		1325
		1326	#if EV_USE_EVENTFD
		1327	if (evfd >= 0)
		1328	close (evfd);
		1329	#endif
		1330
		1331	if (evpipe [0] >= 0)
		1332	{
		1333	close (evpipe [0]);
		1334	close (evpipe [1]);
		1335	}
		1336
		1337	evpipe_init (EV_A);
		1338	/* now iterate over everything, in case we missed something */
		1339	pipecb (EV_A_ &pipeev, EV_READ);
		1340	}
		1341
		1342	postfork = 0;
		1343	}
		1344
		1345	#if EV_MULTIPLICITY
		1346	struct ev_loop *
		1347	ev_loop_new (unsigned int flags)
		1348	{
		1349	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1350
		1351	memset (loop, 0, sizeof (struct ev_loop));
		1352
		1353	loop_init (EV_A_ flags);
		1354
		1355	if (ev_backend (EV_A))
		1356	return loop;
		1357
		1358	return 0;
		1359	}
		1360
		1361	void
		1362	ev_loop_destroy (EV_P)
		1363	{
		1364	loop_destroy (EV_A);
		1365	ev_free (loop);
		1366	}
		1367
		1368	void
		1369	ev_loop_fork (EV_P)
		1370	{
		1371	postfork = 1; /* must be in line with ev_default_fork */
		1372	}
		1373
		1374	#endif
		1375
		1376	#if EV_MULTIPLICITY
		1377	struct ev_loop *
		1378	ev_default_loop_init (unsigned int flags)
		1379	#else
		1380	int
		1381	ev_default_loop (unsigned int flags)
		1382	#endif
		1383	{
		1384	if (!ev_default_loop_ptr)
		1385	{
		1386	#if EV_MULTIPLICITY
		1387	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1388	#else
		1389	ev_default_loop_ptr = 1;
		1390	#endif
		1391
		1392	loop_init (EV_A_ flags);
		1393
		1394	if (ev_backend (EV_A))
		1395	{
		1396	#ifndef _WIN32
485	ev_signal_init (&childev, childcb, SIGCHLD);	1397	ev_signal_init (&childev, childcb, SIGCHLD);
		1398	ev_set_priority (&childev, EV_MAXPRI);
486	ev_signal_start (&childev);	1399	ev_signal_start (EV_A_ &childev);
		1400	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1401	#endif
487	}	1402	}
		1403	else
		1404	ev_default_loop_ptr = 0;
488	}	1405	}
489		1406
490	return ev_method;	1407	return ev_default_loop_ptr;
		1408	}
		1409
		1410	void
		1411	ev_default_destroy (void)
		1412	{
		1413	#if EV_MULTIPLICITY
		1414	struct ev_loop *loop = ev_default_loop_ptr;
		1415	#endif
		1416
		1417	#ifndef _WIN32
		1418	ev_ref (EV_A); /* child watcher */
		1419	ev_signal_stop (EV_A_ &childev);
		1420	#endif
		1421
		1422	loop_destroy (EV_A);
		1423	}
		1424
		1425	void
		1426	ev_default_fork (void)
		1427	{
		1428	#if EV_MULTIPLICITY
		1429	struct ev_loop *loop = ev_default_loop_ptr;
		1430	#endif
		1431
		1432	if (backend)
		1433	postfork = 1; /* must be in line with ev_loop_fork */
491	}	1434	}
492		1435
493	/*****************************************************************************/	1436	/*****************************************************************************/
494		1437
495	void	1438	void
496	ev_fork_prepare (void)	1439	ev_invoke (EV_P_ void *w, int revents)
497	{	1440	{
498	/* nop */	1441	EV_CB_INVOKE ((W)w, revents);
499	}	1442	}
500		1443
501	void	1444	void inline_speed
502	ev_fork_parent (void)
503	{
504	/* nop */
505	}
506
507	void
508	ev_fork_child (void)
509	{
510	#if EV_USE_EPOLL
511	if (ev_method == EVMETHOD_EPOLL)
512	epoll_postfork_child ();
513	#endif
514
515	ev_io_stop (&sigev);
516	close (sigpipe [0]);
517	close (sigpipe [1]);
518	pipe (sigpipe);
519	siginit ();
520	}
521
522	/*****************************************************************************/
523
524	static void
525	call_pending (void)	1445	call_pending (EV_P)
526	{	1446	{
		1447	int pri;
		1448
		1449	for (pri = NUMPRI; pri--; )
527	while (pendingcnt)	1450	while (pendingcnt [pri])
528	{	1451	{
529	ANPENDING *p = pendings + --pendingcnt;	1452	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
530		1453
531	if (p->w)	1454	if (expect_true (p->w))
532	{	1455	{
		1456	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1457
533	p->w->pending = 0;	1458	p->w->pending = 0;
534	p->w->cb (p->w, p->events);	1459	EV_CB_INVOKE (p->w, p->events);
535	}	1460	}
536	}	1461	}
537	}	1462	}
538		1463
539	static void	1464	void inline_size
540	timers_reify (void)	1465	timers_reify (EV_P)
541	{	1466	{
542	while (timercnt && timers [0]->at <= now)	1467	while (timercnt && ev_at (timers [1]) <= mn_now)
543	{	1468	{
544	struct ev_timer *w = timers [0];	1469	ev_timer *w = (ev_timer *)timers [1];
		1470
		1471	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
545		1472
546	/* first reschedule or stop timer */	1473	/* first reschedule or stop timer */
547	if (w->repeat)	1474	if (w->repeat)
548	{	1475	{
549	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1476	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
550	w->at = now + w->repeat;	1477
		1478	ev_at (w) += w->repeat;
		1479	if (ev_at (w) < mn_now)
		1480	ev_at (w) = mn_now;
		1481
551	downheap ((WT *)timers, timercnt, 0);	1482	downheap (timers, timercnt, 1);
552	}	1483	}
553	else	1484	else
554	ev_timer_stop (w); /* nonrepeating: stop timer */	1485	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
555		1486
556	event ((W)w, EV_TIMEOUT);	1487	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
557	}	1488	}
558	}	1489	}
559		1490
560	static void	1491	#if EV_PERIODIC_ENABLE
		1492	void inline_size
561	periodics_reify (void)	1493	periodics_reify (EV_P)
562	{	1494	{
563	while (periodiccnt && periodics [0]->at <= ev_now)	1495	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
564	{	1496	{
565	struct ev_periodic *w = periodics [0];	1497	ev_periodic *w = (ev_periodic *)periodics [1];
		1498
		1499	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
566		1500
567	/* first reschedule or stop timer */	1501	/* first reschedule or stop timer */
568	if (w->interval)	1502	if (w->reschedule_cb)
569	{	1503	{
		1504	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1505	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1506	downheap (periodics, periodiccnt, 1);
		1507	}
		1508	else if (w->interval)
		1509	{
570	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1510	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1511	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
571	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1512	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
572	downheap ((WT *)periodics, periodiccnt, 0);	1513	downheap (periodics, periodiccnt, 1);
573	}	1514	}
574	else	1515	else
575	ev_periodic_stop (w); /* nonrepeating: stop timer */	1516	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
576		1517
577	event ((W)w, EV_PERIODIC);	1518	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
578	}	1519	}
579	}	1520	}
580		1521
581	static void	1522	static void noinline
582	periodics_reschedule (ev_tstamp diff)	1523	periodics_reschedule (EV_P)
583	{	1524	{
584	int i;	1525	int i;
585		1526
586	/* adjust periodics after time jump */	1527	/* adjust periodics after time jump */
587	for (i = 0; i < periodiccnt; ++i)	1528	for (i = 1; i <= periodiccnt; ++i)
588	{	1529	{
589	struct ev_periodic *w = periodics [i];	1530	ev_periodic *w = (ev_periodic *)periodics [i];
590		1531
		1532	if (w->reschedule_cb)
		1533	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
591	if (w->interval)	1534	else if (w->interval)
		1535	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1536	}
		1537
		1538	/* now rebuild the heap */
		1539	for (i = periodiccnt >> 1; i--; )
		1540	downheap (periodics, periodiccnt, i);
		1541	}
		1542	#endif
		1543
		1544	#if EV_IDLE_ENABLE
		1545	void inline_size
		1546	idle_reify (EV_P)
		1547	{
		1548	if (expect_false (idleall))
		1549	{
		1550	int pri;
		1551
		1552	for (pri = NUMPRI; pri--; )
592	{	1553	{
593	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1554	if (pendingcnt [pri])
		1555	break;
594		1556
595	if (fabs (diff) >= 1e-4)	1557	if (idlecnt [pri])
596	{	1558	{
597	ev_periodic_stop (w);	1559	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
598	ev_periodic_start (w);	1560	break;
599
600	i = 0; /* restart loop, inefficient, but time jumps should be rare */
601	}	1561	}
602	}	1562	}
603	}	1563	}
604	}	1564	}
		1565	#endif
605		1566
606	static void	1567	void inline_speed
607	time_update (void)	1568	time_update (EV_P_ ev_tstamp max_block)
608	{	1569	{
609	int i;	1570	int i;
610		1571
611	ev_now = ev_time ();	1572	#if EV_USE_MONOTONIC
612
613	if (have_monotonic)	1573	if (expect_true (have_monotonic))
614	{	1574	{
615	ev_tstamp odiff = diff;	1575	ev_tstamp odiff = rtmn_diff;
616		1576
617	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1577	mn_now = get_clock ();
		1578
		1579	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1580	/* interpolate in the meantime */
		1581	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
618	{	1582	{
619	now = get_clock ();	1583	ev_rt_now = rtmn_diff + mn_now;
		1584	return;
		1585	}
		1586
		1587	now_floor = mn_now;
		1588	ev_rt_now = ev_time ();
		1589
		1590	/* loop a few times, before making important decisions.
		1591	* on the choice of "4": one iteration isn't enough,
		1592	* in case we get preempted during the calls to
		1593	* ev_time and get_clock. a second call is almost guaranteed
		1594	* to succeed in that case, though. and looping a few more times
		1595	* doesn't hurt either as we only do this on time-jumps or
		1596	* in the unlikely event of having been preempted here.
		1597	*/
		1598	for (i = 4; --i; )
		1599	{
620	diff = ev_now - now;	1600	rtmn_diff = ev_rt_now - mn_now;
621		1601
622	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1602	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
623	return; /* all is well */	1603	return; /* all is well */
624		1604
625	ev_now = ev_time ();	1605	ev_rt_now = ev_time ();
		1606	mn_now = get_clock ();
		1607	now_floor = mn_now;
626	}	1608	}
627		1609
		1610	# if EV_PERIODIC_ENABLE
628	periodics_reschedule (diff - odiff);	1611	periodics_reschedule (EV_A);
		1612	# endif
629	/* no timer adjustment, as the monotonic clock doesn't jump */	1613	/* no timer adjustment, as the monotonic clock doesn't jump */
		1614	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
630	}	1615	}
631	else	1616	else
		1617	#endif
632	{	1618	{
633	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1619	ev_rt_now = ev_time ();
		1620
		1621	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
634	{	1622	{
		1623	#if EV_PERIODIC_ENABLE
635	periodics_reschedule (ev_now - now);	1624	periodics_reschedule (EV_A);
636		1625	#endif
637	/* adjust timers. this is easy, as the offset is the same for all */	1626	/* adjust timers. this is easy, as the offset is the same for all of them */
638	for (i = 0; i < timercnt; ++i)	1627	for (i = 1; i <= timercnt; ++i)
639	timers [i]->at += diff;	1628	ev_at (timers [i]) += ev_rt_now - mn_now;
640	}	1629	}
641		1630
642	now = ev_now;	1631	mn_now = ev_rt_now;
643	}	1632	}
644	}	1633	}
645		1634
646	int ev_loop_done;	1635	void
		1636	ev_ref (EV_P)
		1637	{
		1638	++activecnt;
		1639	}
647		1640
		1641	void
		1642	ev_unref (EV_P)
		1643	{
		1644	--activecnt;
		1645	}
		1646
		1647	static int loop_done;
		1648
		1649	void
648	void ev_loop (int flags)	1650	ev_loop (EV_P_ int flags)
649	{	1651	{
650	double block;	1652	loop_done = EVUNLOOP_CANCEL;
651	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1653
		1654	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
652		1655
653	do	1656	do
654	{	1657	{
		1658	#ifndef _WIN32
		1659	if (expect_false (curpid)) /* penalise the forking check even more */
		1660	if (expect_false (getpid () != curpid))
		1661	{
		1662	curpid = getpid ();
		1663	postfork = 1;
		1664	}
		1665	#endif
		1666
		1667	#if EV_FORK_ENABLE
		1668	/* we might have forked, so queue fork handlers */
		1669	if (expect_false (postfork))
		1670	if (forkcnt)
		1671	{
		1672	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1673	call_pending (EV_A);
		1674	}
		1675	#endif
		1676
655	/* queue check watchers (and execute them) */	1677	/* queue prepare watchers (and execute them) */
656	if (preparecnt)	1678	if (expect_false (preparecnt))
657	{	1679	{
658	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1680	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
659	call_pending ();	1681	call_pending (EV_A);
660	}	1682	}
661		1683
		1684	if (expect_false (!activecnt))
		1685	break;
		1686
		1687	/* we might have forked, so reify kernel state if necessary */
		1688	if (expect_false (postfork))
		1689	loop_fork (EV_A);
		1690
662	/* update fd-related kernel structures */	1691	/* update fd-related kernel structures */
663	fd_reify ();	1692	fd_reify (EV_A);
664		1693
665	/* calculate blocking time */	1694	/* calculate blocking time */
		1695	{
		1696	ev_tstamp waittime = 0.;
		1697	ev_tstamp sleeptime = 0.;
666		1698
667	/* we only need this for !monotonic clockor timers, but as we basically	1699	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
668	always have timers, we just calculate it always */
669	ev_now = ev_time ();
670
671	if (flags & EVLOOP_NONBLOCK || idlecnt)
672	block = 0.;
673	else
674	{	1700	{
		1701	/* update time to cancel out callback processing overhead */
		1702	time_update (EV_A_ 1e100);
		1703
675	block = MAX_BLOCKTIME;	1704	waittime = MAX_BLOCKTIME;
676		1705
677	if (timercnt)	1706	if (timercnt)
678	{	1707	{
679	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1708	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
680	if (block > to) block = to;	1709	if (waittime > to) waittime = to;
681	}	1710	}
682		1711
		1712	#if EV_PERIODIC_ENABLE
683	if (periodiccnt)	1713	if (periodiccnt)
684	{	1714	{
685	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1715	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
686	if (block > to) block = to;	1716	if (waittime > to) waittime = to;
687	}	1717	}
		1718	#endif
688		1719
689	if (block < 0.) block = 0.;	1720	if (expect_false (waittime < timeout_blocktime))
		1721	waittime = timeout_blocktime;
		1722
		1723	sleeptime = waittime - backend_fudge;
		1724
		1725	if (expect_true (sleeptime > io_blocktime))
		1726	sleeptime = io_blocktime;
		1727
		1728	if (sleeptime)
		1729	{
		1730	ev_sleep (sleeptime);
		1731	waittime -= sleeptime;
		1732	}
690	}	1733	}
691		1734
692	method_poll (block);	1735	++loop_count;
		1736	backend_poll (EV_A_ waittime);
693		1737
694	/* update ev_now, do magic */	1738	/* update ev_rt_now, do magic */
695	time_update ();	1739	time_update (EV_A_ waittime + sleeptime);
		1740	}
696		1741
697	/* queue pending timers and reschedule them */	1742	/* queue pending timers and reschedule them */
698	timers_reify (); /* relative timers called last */	1743	timers_reify (EV_A); /* relative timers called last */
		1744	#if EV_PERIODIC_ENABLE
699	periodics_reify (); /* absolute timers called first */	1745	periodics_reify (EV_A); /* absolute timers called first */
		1746	#endif
700		1747
		1748	#if EV_IDLE_ENABLE
701	/* queue idle watchers unless io or timers are pending */	1749	/* queue idle watchers unless other events are pending */
702	if (!pendingcnt)	1750	idle_reify (EV_A);
703	queue_events ((W *)idles, idlecnt, EV_IDLE);	1751	#endif
704		1752
705	/* queue check watchers, to be executed first */	1753	/* queue check watchers, to be executed first */
706	if (checkcnt)	1754	if (expect_false (checkcnt))
707	queue_events ((W *)checks, checkcnt, EV_CHECK);	1755	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
708		1756
709	call_pending ();	1757	call_pending (EV_A);
710	}	1758	}
711	while (!ev_loop_done);	1759	while (expect_true (
		1760	activecnt
		1761	&& !loop_done
		1762	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1763	));
712		1764
713	if (ev_loop_done != 2)	1765	if (loop_done == EVUNLOOP_ONE)
		1766	loop_done = EVUNLOOP_CANCEL;
		1767	}
		1768
		1769	void
		1770	ev_unloop (EV_P_ int how)
		1771	{
714	ev_loop_done = 0;	1772	loop_done = how;
715	}	1773	}
716		1774
717	/*****************************************************************************/	1775	/*****************************************************************************/
718		1776
719	static void	1777	void inline_size
720	wlist_add (WL *head, WL elem)	1778	wlist_add (WL *head, WL elem)
721	{	1779	{
722	elem->next = *head;	1780	elem->next = *head;
723	*head = elem;	1781	*head = elem;
724	}	1782	}
725		1783
726	static void	1784	void inline_size
727	wlist_del (WL *head, WL elem)	1785	wlist_del (WL *head, WL elem)
728	{	1786	{
729	while (*head)	1787	while (*head)
730	{	1788	{
731	if (*head == elem)	1789	if (*head == elem)
…		…
736		1794
737	head = &(*head)->next;	1795	head = &(*head)->next;
738	}	1796	}
739	}	1797	}
740		1798
741	static void	1799	void inline_speed
742	ev_clear_pending (W w)	1800	clear_pending (EV_P_ W w)
743	{	1801	{
744	if (w->pending)	1802	if (w->pending)
745	{	1803	{
746	pendings [w->pending - 1].w = 0;	1804	pendings [ABSPRI (w)][w->pending - 1].w = 0;
747	w->pending = 0;	1805	w->pending = 0;
748	}	1806	}
749	}	1807	}
750		1808
751	static void	1809	int
		1810	ev_clear_pending (EV_P_ void *w)
		1811	{
		1812	W w_ = (W)w;
		1813	int pending = w_->pending;
		1814
		1815	if (expect_true (pending))
		1816	{
		1817	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1818	w_->pending = 0;
		1819	p->w = 0;
		1820	return p->events;
		1821	}
		1822	else
		1823	return 0;
		1824	}
		1825
		1826	void inline_size
		1827	pri_adjust (EV_P_ W w)
		1828	{
		1829	int pri = w->priority;
		1830	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1831	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1832	w->priority = pri;
		1833	}
		1834
		1835	void inline_speed
752	ev_start (W w, int active)	1836	ev_start (EV_P_ W w, int active)
753	{	1837	{
		1838	pri_adjust (EV_A_ w);
754	w->active = active;	1839	w->active = active;
		1840	ev_ref (EV_A);
755	}	1841	}
756		1842
757	static void	1843	void inline_size
758	ev_stop (W w)	1844	ev_stop (EV_P_ W w)
759	{	1845	{
		1846	ev_unref (EV_A);
760	w->active = 0;	1847	w->active = 0;
761	}	1848	}
762		1849
763	/*****************************************************************************/	1850	/*****************************************************************************/
764		1851
765	void	1852	void noinline
766	ev_io_start (struct ev_io *w)	1853	ev_io_start (EV_P_ ev_io *w)
767	{	1854	{
768	if (ev_is_active (w))
769	return;
770
771	int fd = w->fd;	1855	int fd = w->fd;
772		1856
		1857	if (expect_false (ev_is_active (w)))
		1858	return;
		1859
773	assert (("ev_io_start called with negative fd", fd >= 0));	1860	assert (("ev_io_start called with negative fd", fd >= 0));
774		1861
775	ev_start ((W)w, 1);	1862	ev_start (EV_A_ (W)w, 1);
776	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1863	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
777	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1864	wlist_add (&anfds[fd].head, (WL)w);
778		1865
779	fd_change (fd);	1866	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1867	w->events &= ~EV_IOFDSET;
780	}	1868	}
781		1869
782	void	1870	void noinline
783	ev_io_stop (struct ev_io *w)	1871	ev_io_stop (EV_P_ ev_io *w)
784	{	1872	{
785	ev_clear_pending ((W)w);	1873	clear_pending (EV_A_ (W)w);
786	if (!ev_is_active (w))	1874	if (expect_false (!ev_is_active (w)))
787	return;	1875	return;
788		1876
		1877	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1878
789	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1879	wlist_del (&anfds[w->fd].head, (WL)w);
790	ev_stop ((W)w);	1880	ev_stop (EV_A_ (W)w);
791		1881
792	fd_change (w->fd);	1882	fd_change (EV_A_ w->fd, 1);
793	}	1883	}
794		1884
795	void	1885	void noinline
796	ev_timer_start (struct ev_timer *w)	1886	ev_timer_start (EV_P_ ev_timer *w)
797	{	1887	{
798	if (ev_is_active (w))	1888	if (expect_false (ev_is_active (w)))
799	return;	1889	return;
800		1890
801	w->at += now;	1891	ev_at (w) += mn_now;
802		1892
803	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1893	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
804		1894
805	ev_start ((W)w, ++timercnt);	1895	ev_start (EV_A_ (W)w, ++timercnt);
806	array_needsize (timers, timermax, timercnt, );	1896	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
807	timers [timercnt - 1] = w;	1897	timers [timercnt] = (WT)w;
808	upheap ((WT *)timers, timercnt - 1);	1898	upheap (timers, timercnt);
809	}
810		1899
811	void	1900	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		1901	}
		1902
		1903	void noinline
812	ev_timer_stop (struct ev_timer *w)	1904	ev_timer_stop (EV_P_ ev_timer *w)
813	{	1905	{
814	ev_clear_pending ((W)w);	1906	clear_pending (EV_A_ (W)w);
815	if (!ev_is_active (w))	1907	if (expect_false (!ev_is_active (w)))
816	return;	1908	return;
817		1909
818	if (w->active < timercnt--)	1910	{
		1911	int active = ev_active (w);
		1912
		1913	assert (("internal timer heap corruption", timers [active] == (WT)w));
		1914
		1915	if (expect_true (active < timercnt))
819	{	1916	{
820	timers [w->active - 1] = timers [timercnt];	1917	timers [active] = timers [timercnt];
821	downheap ((WT *)timers, timercnt, w->active - 1);	1918	adjustheap (timers, timercnt, active);
822	}	1919	}
823		1920
824	w->at = w->repeat;	1921	--timercnt;
		1922	}
825		1923
		1924	ev_at (w) -= mn_now;
		1925
826	ev_stop ((W)w);	1926	ev_stop (EV_A_ (W)w);
827	}	1927	}
828		1928
829	void	1929	void noinline
830	ev_timer_again (struct ev_timer *w)	1930	ev_timer_again (EV_P_ ev_timer *w)
831	{	1931	{
832	if (ev_is_active (w))	1932	if (ev_is_active (w))
833	{	1933	{
834	if (w->repeat)	1934	if (w->repeat)
835	{	1935	{
836	w->at = now + w->repeat;	1936	ev_at (w) = mn_now + w->repeat;
837	downheap ((WT *)timers, timercnt, w->active - 1);	1937	adjustheap (timers, timercnt, ev_active (w));
838	}	1938	}
839	else	1939	else
840	ev_timer_stop (w);	1940	ev_timer_stop (EV_A_ w);
841	}	1941	}
842	else if (w->repeat)	1942	else if (w->repeat)
		1943	{
		1944	ev_at (w) = w->repeat;
843	ev_timer_start (w);	1945	ev_timer_start (EV_A_ w);
		1946	}
844	}	1947	}
845		1948
846	void	1949	#if EV_PERIODIC_ENABLE
		1950	void noinline
847	ev_periodic_start (struct ev_periodic *w)	1951	ev_periodic_start (EV_P_ ev_periodic *w)
848	{	1952	{
849	if (ev_is_active (w))	1953	if (expect_false (ev_is_active (w)))
850	return;	1954	return;
851		1955
		1956	if (w->reschedule_cb)
		1957	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1958	else if (w->interval)
		1959	{
852	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1960	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
853
854	/* this formula differs from the one in periodic_reify because we do not always round up */	1961	/* this formula differs from the one in periodic_reify because we do not always round up */
855	if (w->interval)
856	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1962	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1963	}
		1964	else
		1965	ev_at (w) = w->offset;
857		1966
858	ev_start ((W)w, ++periodiccnt);	1967	ev_start (EV_A_ (W)w, ++periodiccnt);
859	array_needsize (periodics, periodicmax, periodiccnt, );	1968	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
860	periodics [periodiccnt - 1] = w;	1969	periodics [periodiccnt] = (WT)w;
861	upheap ((WT *)periodics, periodiccnt - 1);	1970	upheap (periodics, periodiccnt);
862	}
863		1971
864	void	1972	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
		1973	}
		1974
		1975	void noinline
865	ev_periodic_stop (struct ev_periodic *w)	1976	ev_periodic_stop (EV_P_ ev_periodic *w)
866	{	1977	{
867	ev_clear_pending ((W)w);	1978	clear_pending (EV_A_ (W)w);
868	if (!ev_is_active (w))	1979	if (expect_false (!ev_is_active (w)))
869	return;	1980	return;
870		1981
871	if (w->active < periodiccnt--)	1982	{
		1983	int active = ev_active (w);
		1984
		1985	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		1986
		1987	if (expect_true (active < periodiccnt))
872	{	1988	{
873	periodics [w->active - 1] = periodics [periodiccnt];	1989	periodics [active] = periodics [periodiccnt];
874	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1990	adjustheap (periodics, periodiccnt, active);
875	}	1991	}
876		1992
		1993	--periodiccnt;
		1994	}
		1995
877	ev_stop ((W)w);	1996	ev_stop (EV_A_ (W)w);
878	}	1997	}
879		1998
880	void	1999	void noinline
		2000	ev_periodic_again (EV_P_ ev_periodic *w)
		2001	{
		2002	/* TODO: use adjustheap and recalculation */
		2003	ev_periodic_stop (EV_A_ w);
		2004	ev_periodic_start (EV_A_ w);
		2005	}
		2006	#endif
		2007
		2008	#ifndef SA_RESTART
		2009	# define SA_RESTART 0
		2010	#endif
		2011
		2012	void noinline
881	ev_signal_start (struct ev_signal *w)	2013	ev_signal_start (EV_P_ ev_signal *w)
882	{	2014	{
		2015	#if EV_MULTIPLICITY
		2016	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2017	#endif
883	if (ev_is_active (w))	2018	if (expect_false (ev_is_active (w)))
884	return;	2019	return;
885		2020
886	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2021	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
887		2022
888	ev_start ((W)w, 1);	2023	evpipe_init (EV_A);
		2024
		2025	{
		2026	#ifndef _WIN32
		2027	sigset_t full, prev;
		2028	sigfillset (&full);
		2029	sigprocmask (SIG_SETMASK, &full, &prev);
		2030	#endif
		2031
889	array_needsize (signals, signalmax, w->signum, signals_init);	2032	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2033
		2034	#ifndef _WIN32
		2035	sigprocmask (SIG_SETMASK, &prev, 0);
		2036	#endif
		2037	}
		2038
		2039	ev_start (EV_A_ (W)w, 1);
890	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2040	wlist_add (&signals [w->signum - 1].head, (WL)w);
891		2041
892	if (!w->next)	2042	if (!((WL)w)->next)
893	{	2043	{
		2044	#if _WIN32
		2045	signal (w->signum, ev_sighandler);
		2046	#else
894	struct sigaction sa;	2047	struct sigaction sa;
895	sa.sa_handler = sighandler;	2048	sa.sa_handler = ev_sighandler;
896	sigfillset (&sa.sa_mask);	2049	sigfillset (&sa.sa_mask);
897	sa.sa_flags = 0;	2050	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
898	sigaction (w->signum, &sa, 0);	2051	sigaction (w->signum, &sa, 0);
		2052	#endif
899	}	2053	}
900	}	2054	}
901		2055
902	void	2056	void noinline
903	ev_signal_stop (struct ev_signal *w)	2057	ev_signal_stop (EV_P_ ev_signal *w)
904	{	2058	{
905	ev_clear_pending ((W)w);	2059	clear_pending (EV_A_ (W)w);
906	if (!ev_is_active (w))	2060	if (expect_false (!ev_is_active (w)))
907	return;	2061	return;
908		2062
909	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2063	wlist_del (&signals [w->signum - 1].head, (WL)w);
910	ev_stop ((W)w);	2064	ev_stop (EV_A_ (W)w);
911		2065
912	if (!signals [w->signum - 1].head)	2066	if (!signals [w->signum - 1].head)
913	signal (w->signum, SIG_DFL);	2067	signal (w->signum, SIG_DFL);
914	}	2068	}
915		2069
916	void	2070	void
917	ev_idle_start (struct ev_idle *w)	2071	ev_child_start (EV_P_ ev_child *w)
918	{	2072	{
		2073	#if EV_MULTIPLICITY
		2074	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2075	#endif
919	if (ev_is_active (w))	2076	if (expect_false (ev_is_active (w)))
920	return;	2077	return;
921		2078
922	ev_start ((W)w, ++idlecnt);	2079	ev_start (EV_A_ (W)w, 1);
923	array_needsize (idles, idlemax, idlecnt, );	2080	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
924	idles [idlecnt - 1] = w;
925	}	2081	}
926		2082
927	void	2083	void
928	ev_idle_stop (struct ev_idle *w)	2084	ev_child_stop (EV_P_ ev_child *w)
929	{	2085	{
930	ev_clear_pending ((W)w);	2086	clear_pending (EV_A_ (W)w);
931	if (ev_is_active (w))	2087	if (expect_false (!ev_is_active (w)))
932	return;	2088	return;
933		2089
934	idles [w->active - 1] = idles [--idlecnt];	2090	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
935	ev_stop ((W)w);	2091	ev_stop (EV_A_ (W)w);
936	}	2092	}
937		2093
		2094	#if EV_STAT_ENABLE
		2095
		2096	# ifdef _WIN32
		2097	# undef lstat
		2098	# define lstat(a,b) _stati64 (a,b)
		2099	# endif
		2100
		2101	#define DEF_STAT_INTERVAL 5.0074891
		2102	#define MIN_STAT_INTERVAL 0.1074891
		2103
		2104	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2105
		2106	#if EV_USE_INOTIFY
		2107	# define EV_INOTIFY_BUFSIZE 8192
		2108
		2109	static void noinline
		2110	infy_add (EV_P_ ev_stat *w)
		2111	{
		2112	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);
		2113
		2114	if (w->wd < 0)
		2115	{
		2116	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2117
		2118	/* monitor some parent directory for speedup hints */
		2119	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2120	{
		2121	char path [4096];
		2122	strcpy (path, w->path);
		2123
		2124	do
		2125	{
		2126	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2127	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2128
		2129	char *pend = strrchr (path, '/');
		2130
		2131	if (!pend)
		2132	break; /* whoops, no '/', complain to your admin */
		2133
		2134	*pend = 0;
		2135	w->wd = inotify_add_watch (fs_fd, path, mask);
		2136	}
		2137	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2138	}
		2139	}
		2140	else
		2141	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2142
		2143	if (w->wd >= 0)
		2144	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2145	}
		2146
		2147	static void noinline
		2148	infy_del (EV_P_ ev_stat *w)
		2149	{
		2150	int slot;
		2151	int wd = w->wd;
		2152
		2153	if (wd < 0)
		2154	return;
		2155
		2156	w->wd = -2;
		2157	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2158	wlist_del (&fs_hash [slot].head, (WL)w);
		2159
		2160	/* remove this watcher, if others are watching it, they will rearm */
		2161	inotify_rm_watch (fs_fd, wd);
		2162	}
		2163
		2164	static void noinline
		2165	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2166	{
		2167	if (slot < 0)
		2168	/* overflow, need to check for all hahs slots */
		2169	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2170	infy_wd (EV_A_ slot, wd, ev);
		2171	else
		2172	{
		2173	WL w_;
		2174
		2175	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2176	{
		2177	ev_stat *w = (ev_stat *)w_;
		2178	w_ = w_->next; /* lets us remove this watcher and all before it */
		2179
		2180	if (w->wd == wd || wd == -1)
		2181	{
		2182	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2183	{
		2184	w->wd = -1;
		2185	infy_add (EV_A_ w); /* re-add, no matter what */
		2186	}
		2187
		2188	stat_timer_cb (EV_A_ &w->timer, 0);
		2189	}
		2190	}
		2191	}
		2192	}
		2193
		2194	static void
		2195	infy_cb (EV_P_ ev_io *w, int revents)
		2196	{
		2197	char buf [EV_INOTIFY_BUFSIZE];
		2198	struct inotify_event *ev = (struct inotify_event *)buf;
		2199	int ofs;
		2200	int len = read (fs_fd, buf, sizeof (buf));
		2201
		2202	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2203	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2204	}
		2205
		2206	void inline_size
		2207	infy_init (EV_P)
		2208	{
		2209	if (fs_fd != -2)
		2210	return;
		2211
		2212	fs_fd = inotify_init ();
		2213
		2214	if (fs_fd >= 0)
		2215	{
		2216	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2217	ev_set_priority (&fs_w, EV_MAXPRI);
		2218	ev_io_start (EV_A_ &fs_w);
		2219	}
		2220	}
		2221
		2222	void inline_size
		2223	infy_fork (EV_P)
		2224	{
		2225	int slot;
		2226
		2227	if (fs_fd < 0)
		2228	return;
		2229
		2230	close (fs_fd);
		2231	fs_fd = inotify_init ();
		2232
		2233	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2234	{
		2235	WL w_ = fs_hash [slot].head;
		2236	fs_hash [slot].head = 0;
		2237
		2238	while (w_)
		2239	{
		2240	ev_stat *w = (ev_stat *)w_;
		2241	w_ = w_->next; /* lets us add this watcher */
		2242
		2243	w->wd = -1;
		2244
		2245	if (fs_fd >= 0)
		2246	infy_add (EV_A_ w); /* re-add, no matter what */
		2247	else
		2248	ev_timer_start (EV_A_ &w->timer);
		2249	}
		2250
		2251	}
		2252	}
		2253
		2254	#endif
		2255
938	void	2256	void
		2257	ev_stat_stat (EV_P_ ev_stat *w)
		2258	{
		2259	if (lstat (w->path, &w->attr) < 0)
		2260	w->attr.st_nlink = 0;
		2261	else if (!w->attr.st_nlink)
		2262	w->attr.st_nlink = 1;
		2263	}
		2264
		2265	static void noinline
		2266	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2267	{
		2268	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2269
		2270	/* we copy this here each the time so that */
		2271	/* prev has the old value when the callback gets invoked */
		2272	w->prev = w->attr;
		2273	ev_stat_stat (EV_A_ w);
		2274
		2275	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2276	if (
		2277	w->prev.st_dev != w->attr.st_dev
		2278	|| w->prev.st_ino != w->attr.st_ino
		2279	|| w->prev.st_mode != w->attr.st_mode
		2280	|| w->prev.st_nlink != w->attr.st_nlink
		2281	|| w->prev.st_uid != w->attr.st_uid
		2282	|| w->prev.st_gid != w->attr.st_gid
		2283	|| w->prev.st_rdev != w->attr.st_rdev
		2284	|| w->prev.st_size != w->attr.st_size
		2285	|| w->prev.st_atime != w->attr.st_atime
		2286	|| w->prev.st_mtime != w->attr.st_mtime
		2287	|| w->prev.st_ctime != w->attr.st_ctime
		2288	) {
		2289	#if EV_USE_INOTIFY
		2290	infy_del (EV_A_ w);
		2291	infy_add (EV_A_ w);
		2292	ev_stat_stat (EV_A_ w); /* avoid race... */
		2293	#endif
		2294
		2295	ev_feed_event (EV_A_ w, EV_STAT);
		2296	}
		2297	}
		2298
		2299	void
		2300	ev_stat_start (EV_P_ ev_stat *w)
		2301	{
		2302	if (expect_false (ev_is_active (w)))
		2303	return;
		2304
		2305	/* since we use memcmp, we need to clear any padding data etc. */
		2306	memset (&w->prev, 0, sizeof (ev_statdata));
		2307	memset (&w->attr, 0, sizeof (ev_statdata));
		2308
		2309	ev_stat_stat (EV_A_ w);
		2310
		2311	if (w->interval < MIN_STAT_INTERVAL)
		2312	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2313
		2314	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2315	ev_set_priority (&w->timer, ev_priority (w));
		2316
		2317	#if EV_USE_INOTIFY
		2318	infy_init (EV_A);
		2319
		2320	if (fs_fd >= 0)
		2321	infy_add (EV_A_ w);
		2322	else
		2323	#endif
		2324	ev_timer_start (EV_A_ &w->timer);
		2325
		2326	ev_start (EV_A_ (W)w, 1);
		2327	}
		2328
		2329	void
		2330	ev_stat_stop (EV_P_ ev_stat *w)
		2331	{
		2332	clear_pending (EV_A_ (W)w);
		2333	if (expect_false (!ev_is_active (w)))
		2334	return;
		2335
		2336	#if EV_USE_INOTIFY
		2337	infy_del (EV_A_ w);
		2338	#endif
		2339	ev_timer_stop (EV_A_ &w->timer);
		2340
		2341	ev_stop (EV_A_ (W)w);
		2342	}
		2343	#endif
		2344
		2345	#if EV_IDLE_ENABLE
		2346	void
		2347	ev_idle_start (EV_P_ ev_idle *w)
		2348	{
		2349	if (expect_false (ev_is_active (w)))
		2350	return;
		2351
		2352	pri_adjust (EV_A_ (W)w);
		2353
		2354	{
		2355	int active = ++idlecnt [ABSPRI (w)];
		2356
		2357	++idleall;
		2358	ev_start (EV_A_ (W)w, active);
		2359
		2360	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2361	idles [ABSPRI (w)][active - 1] = w;
		2362	}
		2363	}
		2364
		2365	void
		2366	ev_idle_stop (EV_P_ ev_idle *w)
		2367	{
		2368	clear_pending (EV_A_ (W)w);
		2369	if (expect_false (!ev_is_active (w)))
		2370	return;
		2371
		2372	{
		2373	int active = ev_active (w);
		2374
		2375	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2376	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2377
		2378	ev_stop (EV_A_ (W)w);
		2379	--idleall;
		2380	}
		2381	}
		2382	#endif
		2383
		2384	void
939	ev_prepare_start (struct ev_prepare *w)	2385	ev_prepare_start (EV_P_ ev_prepare *w)
940	{	2386	{
941	if (ev_is_active (w))	2387	if (expect_false (ev_is_active (w)))
942	return;	2388	return;
943		2389
944	ev_start ((W)w, ++preparecnt);	2390	ev_start (EV_A_ (W)w, ++preparecnt);
945	array_needsize (prepares, preparemax, preparecnt, );	2391	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
946	prepares [preparecnt - 1] = w;	2392	prepares [preparecnt - 1] = w;
947	}	2393	}
948		2394
949	void	2395	void
950	ev_prepare_stop (struct ev_prepare *w)	2396	ev_prepare_stop (EV_P_ ev_prepare *w)
951	{	2397	{
952	ev_clear_pending ((W)w);	2398	clear_pending (EV_A_ (W)w);
953	if (ev_is_active (w))	2399	if (expect_false (!ev_is_active (w)))
954	return;	2400	return;
955		2401
		2402	{
		2403	int active = ev_active (w);
		2404
956	prepares [w->active - 1] = prepares [--preparecnt];	2405	prepares [active - 1] = prepares [--preparecnt];
		2406	ev_active (prepares [active - 1]) = active;
		2407	}
		2408
957	ev_stop ((W)w);	2409	ev_stop (EV_A_ (W)w);
958	}	2410	}
959		2411
960	void	2412	void
961	ev_check_start (struct ev_check *w)	2413	ev_check_start (EV_P_ ev_check *w)
962	{	2414	{
963	if (ev_is_active (w))	2415	if (expect_false (ev_is_active (w)))
964	return;	2416	return;
965		2417
966	ev_start ((W)w, ++checkcnt);	2418	ev_start (EV_A_ (W)w, ++checkcnt);
967	array_needsize (checks, checkmax, checkcnt, );	2419	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
968	checks [checkcnt - 1] = w;	2420	checks [checkcnt - 1] = w;
969	}	2421	}
970		2422
971	void	2423	void
972	ev_check_stop (struct ev_check *w)	2424	ev_check_stop (EV_P_ ev_check *w)
973	{	2425	{
974	ev_clear_pending ((W)w);	2426	clear_pending (EV_A_ (W)w);
975	if (ev_is_active (w))	2427	if (expect_false (!ev_is_active (w)))
976	return;	2428	return;
977		2429
		2430	{
		2431	int active = ev_active (w);
		2432
978	checks [w->active - 1] = checks [--checkcnt];	2433	checks [active - 1] = checks [--checkcnt];
		2434	ev_active (checks [active - 1]) = active;
		2435	}
		2436
979	ev_stop ((W)w);	2437	ev_stop (EV_A_ (W)w);
980	}	2438	}
981		2439
982	void	2440	#if EV_EMBED_ENABLE
983	ev_child_start (struct ev_child *w)	2441	void noinline
		2442	ev_embed_sweep (EV_P_ ev_embed *w)
984	{	2443	{
		2444	ev_loop (w->other, EVLOOP_NONBLOCK);
		2445	}
		2446
		2447	static void
		2448	embed_io_cb (EV_P_ ev_io *io, int revents)
		2449	{
		2450	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2451
985	if (ev_is_active (w))	2452	if (ev_cb (w))
986	return;	2453	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2454	else
		2455	ev_loop (w->other, EVLOOP_NONBLOCK);
		2456	}
987		2457
		2458	static void
		2459	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2460	{
		2461	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2462
		2463	{
		2464	struct ev_loop *loop = w->other;
		2465
		2466	while (fdchangecnt)
		2467	{
		2468	fd_reify (EV_A);
		2469	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2470	}
		2471	}
		2472	}
		2473
		2474	#if 0
		2475	static void
		2476	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2477	{
		2478	ev_idle_stop (EV_A_ idle);
		2479	}
		2480	#endif
		2481
		2482	void
		2483	ev_embed_start (EV_P_ ev_embed *w)
		2484	{
		2485	if (expect_false (ev_is_active (w)))
		2486	return;
		2487
		2488	{
		2489	struct ev_loop *loop = w->other;
		2490	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2491	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2492	}
		2493
		2494	ev_set_priority (&w->io, ev_priority (w));
		2495	ev_io_start (EV_A_ &w->io);
		2496
		2497	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2498	ev_set_priority (&w->prepare, EV_MINPRI);
		2499	ev_prepare_start (EV_A_ &w->prepare);
		2500
		2501	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2502
988	ev_start ((W)w, 1);	2503	ev_start (EV_A_ (W)w, 1);
989	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	}	2504	}
991		2505
992	void	2506	void
993	ev_child_stop (struct ev_child *w)	2507	ev_embed_stop (EV_P_ ev_embed *w)
994	{	2508	{
995	ev_clear_pending ((W)w);	2509	clear_pending (EV_A_ (W)w);
996	if (ev_is_active (w))	2510	if (expect_false (!ev_is_active (w)))
997	return;	2511	return;
998		2512
999	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2513	ev_io_stop (EV_A_ &w->io);
		2514	ev_prepare_stop (EV_A_ &w->prepare);
		2515
1000	ev_stop ((W)w);	2516	ev_stop (EV_A_ (W)w);
1001	}	2517	}
		2518	#endif
		2519
		2520	#if EV_FORK_ENABLE
		2521	void
		2522	ev_fork_start (EV_P_ ev_fork *w)
		2523	{
		2524	if (expect_false (ev_is_active (w)))
		2525	return;
		2526
		2527	ev_start (EV_A_ (W)w, ++forkcnt);
		2528	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2529	forks [forkcnt - 1] = w;
		2530	}
		2531
		2532	void
		2533	ev_fork_stop (EV_P_ ev_fork *w)
		2534	{
		2535	clear_pending (EV_A_ (W)w);
		2536	if (expect_false (!ev_is_active (w)))
		2537	return;
		2538
		2539	{
		2540	int active = ev_active (w);
		2541
		2542	forks [active - 1] = forks [--forkcnt];
		2543	ev_active (forks [active - 1]) = active;
		2544	}
		2545
		2546	ev_stop (EV_A_ (W)w);
		2547	}
		2548	#endif
		2549
		2550	#if EV_ASYNC_ENABLE
		2551	void
		2552	ev_async_start (EV_P_ ev_async *w)
		2553	{
		2554	if (expect_false (ev_is_active (w)))
		2555	return;
		2556
		2557	evpipe_init (EV_A);
		2558
		2559	ev_start (EV_A_ (W)w, ++asynccnt);
		2560	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2561	asyncs [asynccnt - 1] = w;
		2562	}
		2563
		2564	void
		2565	ev_async_stop (EV_P_ ev_async *w)
		2566	{
		2567	clear_pending (EV_A_ (W)w);
		2568	if (expect_false (!ev_is_active (w)))
		2569	return;
		2570
		2571	{
		2572	int active = ev_active (w);
		2573
		2574	asyncs [active - 1] = asyncs [--asynccnt];
		2575	ev_active (asyncs [active - 1]) = active;
		2576	}
		2577
		2578	ev_stop (EV_A_ (W)w);
		2579	}
		2580
		2581	void
		2582	ev_async_send (EV_P_ ev_async *w)
		2583	{
		2584	w->sent = 1;
		2585	evpipe_write (EV_A_ &gotasync);
		2586	}
		2587	#endif
1002		2588
1003	/*****************************************************************************/	2589	/*****************************************************************************/
1004		2590
1005	struct ev_once	2591	struct ev_once
1006	{	2592	{
1007	struct ev_io io;	2593	ev_io io;
1008	struct ev_timer to;	2594	ev_timer to;
1009	void (*cb)(int revents, void *arg);	2595	void (*cb)(int revents, void *arg);
1010	void *arg;	2596	void *arg;
1011	};	2597	};
1012		2598
1013	static void	2599	static void
1014	once_cb (struct ev_once *once, int revents)	2600	once_cb (EV_P_ struct ev_once *once, int revents)
1015	{	2601	{
1016	void (*cb)(int revents, void *arg) = once->cb;	2602	void (*cb)(int revents, void *arg) = once->cb;
1017	void *arg = once->arg;	2603	void *arg = once->arg;
1018		2604
1019	ev_io_stop (&once->io);	2605	ev_io_stop (EV_A_ &once->io);
1020	ev_timer_stop (&once->to);	2606	ev_timer_stop (EV_A_ &once->to);
1021	free (once);	2607	ev_free (once);
1022		2608
1023	cb (revents, arg);	2609	cb (revents, arg);
1024	}	2610	}
1025		2611
1026	static void	2612	static void
1027	once_cb_io (struct ev_io *w, int revents)	2613	once_cb_io (EV_P_ ev_io *w, int revents)
1028	{	2614	{
1029	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2615	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1030	}	2616	}
1031		2617
1032	static void	2618	static void
1033	once_cb_to (struct ev_timer *w, int revents)	2619	once_cb_to (EV_P_ ev_timer *w, int revents)
1034	{	2620	{
1035	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2621	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1036	}	2622	}
1037		2623
1038	void	2624	void
1039	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2625	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1040	{	2626	{
1041	struct ev_once *once = malloc (sizeof (struct ev_once));	2627	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1042		2628
1043	if (!once)	2629	if (expect_false (!once))
		2630	{
1044	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2631	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1045	else	2632	return;
1046	{	2633	}
		2634
1047	once->cb = cb;	2635	once->cb = cb;
1048	once->arg = arg;	2636	once->arg = arg;
1049		2637
1050	ev_watcher_init (&once->io, once_cb_io);	2638	ev_init (&once->io, once_cb_io);
1051	if (fd >= 0)	2639	if (fd >= 0)
1052	{	2640	{
1053	ev_io_set (&once->io, fd, events);	2641	ev_io_set (&once->io, fd, events);
1054	ev_io_start (&once->io);	2642	ev_io_start (EV_A_ &once->io);
1055	}	2643	}
1056		2644
1057	ev_watcher_init (&once->to, once_cb_to);	2645	ev_init (&once->to, once_cb_to);
1058	if (timeout >= 0.)	2646	if (timeout >= 0.)
1059	{	2647	{
1060	ev_timer_set (&once->to, timeout, 0.);	2648	ev_timer_set (&once->to, timeout, 0.);
1061	ev_timer_start (&once->to);	2649	ev_timer_start (EV_A_ &once->to);
1062	}
1063	}
1064	}
1065
1066	/*****************************************************************************/
1067
1068	#if 0
1069
1070	struct ev_io wio;
1071
1072	static void
1073	sin_cb (struct ev_io *w, int revents)
1074	{
1075	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1076	}
1077
1078	static void
1079	ocb (struct ev_timer *w, int revents)
1080	{
1081	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1082	ev_timer_stop (w);
1083	ev_timer_start (w);
1084	}
1085
1086	static void
1087	scb (struct ev_signal *w, int revents)
1088	{
1089	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1090	ev_io_stop (&wio);
1091	ev_io_start (&wio);
1092	}
1093
1094	static void
1095	gcb (struct ev_signal *w, int revents)
1096	{
1097	fprintf (stderr, "generic %x\n", revents);
1098
1099	}
1100
1101	int main (void)
1102	{
1103	ev_init (0);
1104
1105	ev_io_init (&wio, sin_cb, 0, EV_READ);
1106	ev_io_start (&wio);
1107
1108	struct ev_timer t[10000];
1109
1110	#if 0
1111	int i;
1112	for (i = 0; i < 10000; ++i)
1113	{	2650	}
1114	struct ev_timer *w = t + i;
1115	ev_watcher_init (w, ocb, i);
1116	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1117	ev_timer_start (w);
1118	if (drand48 () < 0.5)
1119	ev_timer_stop (w);
1120	}
1121	#endif
1122
1123	struct ev_timer t1;
1124	ev_timer_init (&t1, ocb, 5, 10);
1125	ev_timer_start (&t1);
1126
1127	struct ev_signal sig;
1128	ev_signal_init (&sig, scb, SIGQUIT);
1129	ev_signal_start (&sig);
1130
1131	struct ev_check cw;
1132	ev_check_init (&cw, gcb);
1133	ev_check_start (&cw);
1134
1135	struct ev_idle iw;
1136	ev_idle_init (&iw, gcb);
1137	ev_idle_start (&iw);
1138
1139	ev_loop (0);
1140
1141	return 0;
1142	}	2651	}
1143		2652
		2653	#if EV_MULTIPLICITY
		2654	#include "ev_wrap.h"
1144	#endif	2655	#endif
1145		2656
		2657	#ifdef __cplusplus
		2658	}
		2659	#endif
1146		2660
1147
1148

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