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Comparing libev/ev.c (file contents):
Revision 1.43 by root, Fri Nov 2 20:21:33 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	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
51	/**/	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 */
52		167
53	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
54	# define EV_USE_MONOTONIC 1	169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
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
61	#ifndef EV_USE_POLL	184	#ifndef EV_USE_POLL
62	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
63	#endif	190	#endif
64		191
65	#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
66	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
67	#endif	197	# endif
		198	#endif
68		199
		200	#ifndef EV_USE_KQUEUE
		201	# define EV_USE_KQUEUE 0
		202	#endif
		203
69	#ifndef EV_USE_REALTIME	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))
70	# define EV_USE_REALTIME 1	210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
71	#endif	213	# endif
		214	#endif
72		215
73	/**/	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 */
74		241
75	#ifndef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
76	# undef EV_USE_MONOTONIC	243	# undef EV_USE_MONOTONIC
77	# define EV_USE_MONOTONIC 0	244	# define EV_USE_MONOTONIC 0
78	#endif	245	#endif
…		…
80	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
81	# undef EV_USE_REALTIME	248	# undef EV_USE_REALTIME
82	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
83	#endif	250	#endif
84		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
		267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
85	/**/	283	/**/
86		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 */
		294
87	#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) */
88	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
89	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
90	/*#define CLEANUP_INTERVAL 300. /* 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 */
91		298
92	#include "ev.h"
93
94	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
95	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
96	# define inline inline	301	# define noinline __attribute__ ((noinline))
97	#else	302	#else
98	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
99	# define inline static	304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
100	#endif	308	#endif
101		309
102	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
103	#define expect_true(expr) expect ((expr) != 0, 1)	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
104		319
105	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
106	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
107		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
108	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
109	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
110	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
111		329
112	static ev_tstamp now_floor, 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
113	ev_tstamp ev_now;	450	ev_tstamp ev_rt_now;
114	int ev_method;	451	#define VAR(name,decl) static decl;
		452	#include "ev_vars.h"
		453	#undef VAR
115		454
116	static int have_monotonic; /* runtime */	455	static int ev_default_loop_ptr;
117		456
118	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	457	#endif
119	static void (*method_modify)(int fd, int oev, int nev);
120	static void (*method_poll)(ev_tstamp timeout);
121		458
122	/*****************************************************************************/	459	/*****************************************************************************/
123		460
124	ev_tstamp	461	ev_tstamp
125	ev_time (void)	462	ev_time (void)
…		…
133	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
134	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
135	#endif	472	#endif
136	}	473	}
137		474
138	static ev_tstamp	475	ev_tstamp inline_size
139	get_clock (void)	476	get_clock (void)
140	{	477	{
141	#if EV_USE_MONOTONIC	478	#if EV_USE_MONOTONIC
142	if (expect_true (have_monotonic))	479	if (expect_true (have_monotonic))
143	{	480	{
…		…
148	#endif	485	#endif
149		486
150	return ev_time ();	487	return ev_time ();
151	}	488	}
152		489
153	#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
154		497
155	#define array_needsize(base,cur,cnt,init) \	498	void
156	if (expect_false ((cnt) > cur)) \	499	ev_sleep (ev_tstamp delay)
157	{ \	500	{
158	int newcnt = cur; \	501	if (delay > 0.)
159	do \
160	{ \
161	newcnt = array_roundsize (base, newcnt << 1); \
162	} \
163	while ((cnt) > newcnt); \
164	\
165	base = realloc (base, sizeof (*base) * (newcnt)); \
166	init (base + cur, newcnt - cur); \
167	cur = newcnt; \
168	}	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	}
169		522
170	/*****************************************************************************/	523	/*****************************************************************************/
171		524
172	typedef struct	525	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
173	{
174	struct ev_io *head;
175	unsigned char events;
176	unsigned char reify;
177	} ANFD;
178		526
179	static ANFD *anfds;	527	int inline_size
180	static int anfdmax;	528	array_nextsize (int elem, int cur, int cnt)
		529	{
		530	int ncur = cur + 1;
181		531
182	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
183	anfds_init (ANFD *base, int count)	608	anfds_init (ANFD *base, int count)
184	{	609	{
185	while (count--)	610	while (count--)
186	{	611	{
187	base->head = 0;	612	base->head = 0;
…		…
190		615
191	++base;	616	++base;
192	}	617	}
193	}	618	}
194		619
195	typedef struct	620	void inline_speed
196	{
197	W w;
198	int events;
199	} ANPENDING;
200
201	static ANPENDING *pendings [NUMPRI];
202	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
203
204	static void
205	event (W w, int events)
206	{
207	if (w->pending)
208	{
209	pendings [ABSPRI (w)][w->pending - 1].events |= events;
210	return;
211	}
212
213	w->pending = ++pendingcnt [ABSPRI (w)];
214	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
215	pendings [ABSPRI (w)][w->pending - 1].w = w;
216	pendings [ABSPRI (w)][w->pending - 1].events = events;
217	}
218
219	static void
220	queue_events (W *events, int eventcnt, int type)
221	{
222	int i;
223
224	for (i = 0; i < eventcnt; ++i)
225	event (events [i], type);
226	}
227
228	static void
229	fd_event (int fd, int events)	621	fd_event (EV_P_ int fd, int revents)
230	{	622	{
231	ANFD *anfd = anfds + fd;	623	ANFD *anfd = anfds + fd;
232	struct ev_io *w;	624	ev_io *w;
233		625
234	for (w = anfd->head; w; w = w->next)	626	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
235	{	627	{
236	int ev = w->events & events;	628	int ev = w->events & revents;
237		629
238	if (ev)	630	if (ev)
239	event ((W)w, ev);	631	ev_feed_event (EV_A_ (W)w, ev);
240	}	632	}
241	}	633	}
242		634
243	/*****************************************************************************/	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	}
244		641
245	static int *fdchanges;	642	void inline_size
246	static int fdchangemax, fdchangecnt;	643	fd_reify (EV_P)
247
248	static void
249	fd_reify (void)
250	{	644	{
251	int i;	645	int i;
252		646
253	for (i = 0; i < fdchangecnt; ++i)	647	for (i = 0; i < fdchangecnt; ++i)
254	{	648	{
255	int fd = fdchanges [i];	649	int fd = fdchanges [i];
256	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
257	struct ev_io *w;	651	ev_io *w;
258		652
259	int events = 0;	653	unsigned char events = 0;
260		654
261	for (w = anfd->head; w; w = w->next)	655	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
262	events |= w->events;	656	events |= (unsigned char)w->events;
263		657
264	anfd->reify = 0;	658	#if EV_SELECT_IS_WINSOCKET
265		659	if (events)
266	if (anfd->events != events)
267	{	660	{
268	method_modify (fd, anfd->events, events);	661	unsigned long argp;
269	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));
270	}	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	}
271	}	681	}
272		682
273	fdchangecnt = 0;	683	fdchangecnt = 0;
274	}	684	}
275		685
276	static void	686	void inline_size
277	fd_change (int fd)	687	fd_change (EV_P_ int fd, int flags)
278	{	688	{
279	if (anfds [fd].reify || fdchangecnt < 0)	689	unsigned char reify = anfds [fd].reify;
280	return;
281
282	anfds [fd].reify = 1;	690	anfds [fd].reify |= flags;
283		691
		692	if (expect_true (!reify))
		693	{
284	++fdchangecnt;	694	++fdchangecnt;
285	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
286	fdchanges [fdchangecnt - 1] = fd;	696	fdchanges [fdchangecnt - 1] = fd;
		697	}
287	}	698	}
288		699
289	static void	700	void inline_speed
290	fd_kill (int fd)	701	fd_kill (EV_P_ int fd)
291	{	702	{
292	struct ev_io *w;	703	ev_io *w;
293		704
294	printf ("killing fd %d\n", fd);//D
295	while ((w = anfds [fd].head))	705	while ((w = (ev_io *)anfds [fd].head))
296	{	706	{
297	ev_io_stop (w);	707	ev_io_stop (EV_A_ w);
298	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);	708	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
299	}	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
300	}	720	}
301		721
302	/* called on EBADF to verify fds */	722	/* called on EBADF to verify fds */
303	static void	723	static void noinline
304	fd_ebadf (void)	724	fd_ebadf (EV_P)
305	{	725	{
306	int fd;	726	int fd;
307		727
308	for (fd = 0; fd < anfdmax; ++fd)	728	for (fd = 0; fd < anfdmax; ++fd)
309	if (anfds [fd].events)	729	if (anfds [fd].events)
310	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	730	if (!fd_valid (fd) == -1 && errno == EBADF)
311	fd_kill (fd);	731	fd_kill (EV_A_ fd);
312	}	732	}
313		733
314	/* called on ENOMEM in select/poll to kill some fds and retry */	734	/* called on ENOMEM in select/poll to kill some fds and retry */
315	static void	735	static void noinline
316	fd_enomem (void)	736	fd_enomem (EV_P)
317	{	737	{
318	int fd = anfdmax;	738	int fd;
319		739
320	while (fd--)	740	for (fd = anfdmax; fd--; )
321	if (anfds [fd].events)	741	if (anfds [fd].events)
322	{	742	{
323	close (fd);
324	fd_kill (fd);	743	fd_kill (EV_A_ fd);
325	return;	744	return;
326	}	745	}
327	}	746	}
328		747
		748	/* usually called after fork if backend needs to re-arm all fds from scratch */
		749	static void noinline
		750	fd_rearm_all (EV_P)
		751	{
		752	int fd;
		753
		754	for (fd = 0; fd < anfdmax; ++fd)
		755	if (anfds [fd].events)
		756	{
		757	anfds [fd].events = 0;
		758	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		759	}
		760	}
		761
329	/*****************************************************************************/	762	/*****************************************************************************/
330		763
331	static struct ev_timer **timers;	764	/* towards the root */
332	static int timermax, timercnt;	765	void inline_speed
333
334	static struct ev_periodic **periodics;
335	static int periodicmax, periodiccnt;
336
337	static void
338	upheap (WT *timers, int k)	766	upheap (WT *heap, int k)
339	{	767	{
340	WT w = timers [k];	768	WT w = heap [k];
341		769
342	while (k && timers [k >> 1]->at > w->at)	770	for (;;)
343	{
344	timers [k] = timers [k >> 1];
345	timers [k]->active = k + 1;
346	k >>= 1;
347	}	771	{
348
349	timers [k] = w;
350	timers [k]->active = k + 1;
351
352	}
353
354	static void
355	downheap (WT *timers, int N, int k)
356	{
357	WT w = timers [k];
358
359	while (k < (N >> 1))
360	{
361	int j = k << 1;	772	int p = k >> 1;
362		773
363	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	774	/* maybe we could use a dummy element at heap [0]? */
364	++j;	775	if (!p || heap [p]->at <= w->at)
365
366	if (w->at <= timers [j]->at)
367	break;	776	break;
368		777
369	timers [k] = timers [j];	778	heap [k] = heap [p];
370	timers [k]->active = k + 1;	779	ev_active (heap [k]) = k;
371	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 (;;)
372	}	794	{
		795	int c = k << 1;
373		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
374	timers [k] = w;	812	heap [k] = w;
375	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);
376	}	821	}
377		822
378	/*****************************************************************************/	823	/*****************************************************************************/
379		824
380	typedef struct	825	typedef struct
381	{	826	{
382	struct ev_signal *head;	827	WL head;
383	sig_atomic_t volatile gotsig;	828	EV_ATOMIC_T gotsig;
384	} ANSIG;	829	} ANSIG;
385		830
386	static ANSIG *signals;	831	static ANSIG *signals;
387	static int signalmax;	832	static int signalmax;
388		833
389	static int sigpipe [2];	834	static EV_ATOMIC_T gotsig;
390	static sig_atomic_t volatile gotsig;
391	static struct ev_io sigev;
392		835
393	static void	836	void inline_size
394	signals_init (ANSIG *base, int count)	837	signals_init (ANSIG *base, int count)
395	{	838	{
396	while (count--)	839	while (count--)
397	{	840	{
398	base->head = 0;	841	base->head = 0;
…		…
400		843
401	++base;	844	++base;
402	}	845	}
403	}	846	}
404		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
405	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
406	sighandler (int signum)	958	ev_sighandler (int signum)
407	{	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
408	signals [signum - 1].gotsig = 1;	968	signals [signum - 1].gotsig = 1;
409		969	evpipe_write (EV_A_ &gotsig);
410	if (!gotsig)
411	{
412	gotsig = 1;
413	write (sigpipe [1], &signum, 1);
414	}
415	}	970	}
416		971
417	static void	972	void noinline
418	sigcb (struct ev_io *iow, int revents)	973	ev_feed_signal_event (EV_P_ int signum)
419	{	974	{
420	struct ev_signal *w;	975	WL w;
		976
		977	#if EV_MULTIPLICITY
		978	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		979	#endif
		980
421	int signum;	981	--signum;
422		982
423	read (sigpipe [0], &revents, 1);	983	if (signum < 0 || signum >= signalmax)
424	gotsig = 0;	984	return;
425		985
426	for (signum = signalmax; signum--; )
427	if (signals [signum].gotsig)
428	{
429	signals [signum].gotsig = 0;	986	signals [signum].gotsig = 0;
430		987
431	for (w = signals [signum].head; w; w = w->next)	988	for (w = signals [signum].head; w; w = w->next)
432	event ((W)w, EV_SIGNAL);	989	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
433	}
434	}
435
436	static void
437	siginit (void)
438	{
439	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
440	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
441
442	/* rather than sort out wether we really need nb, set it */
443	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
444	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
445
446	ev_io_set (&sigev, sigpipe [0], EV_READ);
447	ev_io_start (&sigev);
448	}	990	}
449		991
450	/*****************************************************************************/	992	/*****************************************************************************/
451		993
452	static struct ev_idle **idles;	994	static WL childs [EV_PID_HASHSIZE];
453	static int idlemax, idlecnt;
454		995
455	static struct ev_prepare **prepares;	996	#ifndef _WIN32
456	static int preparemax, preparecnt;
457		997
458	static struct ev_check **checks;
459	static int checkmax, checkcnt;
460
461	/*****************************************************************************/
462
463	static struct ev_child *childs [PID_HASHSIZE];
464	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	}
465		1022
466	#ifndef WCONTINUED	1023	#ifndef WCONTINUED
467	# define WCONTINUED 0	1024	# define WCONTINUED 0
468	#endif	1025	#endif
469		1026
470	static void	1027	static void
471	childcb (struct ev_signal *sw, int revents)	1028	childcb (EV_P_ ev_signal *sw, int revents)
472	{	1029	{
473	struct ev_child *w;
474	int pid, status;	1030	int pid, status;
475		1031
		1032	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
476	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	1033	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
477	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	1034	if (!WCONTINUED
478	if (w->pid == pid || !w->pid)	1035	|| errno != EINVAL
479	{	1036	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
480	w->status = status;	1037	return;
481	event ((W)w, EV_CHILD);	1038
482	}	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 */
483	}	1046	}
		1047
		1048	#endif
484		1049
485	/*****************************************************************************/	1050	/*****************************************************************************/
486		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
487	#if EV_USE_EPOLL	1058	#if EV_USE_EPOLL
488	# include "ev_epoll.c"	1059	# include "ev_epoll.c"
489	#endif	1060	#endif
490	#if EV_USE_POLL	1061	#if EV_USE_POLL
491	# include "ev_poll.c"	1062	# include "ev_poll.c"
…		…
504	ev_version_minor (void)	1075	ev_version_minor (void)
505	{	1076	{
506	return EV_VERSION_MINOR;	1077	return EV_VERSION_MINOR;
507	}	1078	}
508		1079
509	/* return true if we are running with elevated privileges and ignore env variables */	1080	/* return true if we are running with elevated privileges and should ignore env variables */
510	static int	1081	int inline_size
511	enable_secure ()	1082	enable_secure (void)
512	{	1083	{
		1084	#ifdef _WIN32
		1085	return 0;
		1086	#else
513	return getuid () != geteuid ()	1087	return getuid () != geteuid ()
514	|| getgid () != getegid ();	1088	|| getgid () != getegid ();
		1089	#endif
515	}	1090	}
516		1091
517	int ev_init (int methods)	1092	unsigned int
		1093	ev_supported_backends (void)
518	{	1094	{
519	if (!ev_method)	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)
520	{	1164	{
521	#if EV_USE_MONOTONIC	1165	#if EV_USE_MONOTONIC
522	{	1166	{
523	struct timespec ts;	1167	struct timespec ts;
524	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1168	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
525	have_monotonic = 1;	1169	have_monotonic = 1;
526	}	1170	}
527	#endif	1171	#endif
528		1172
529	ev_now = ev_time ();	1173	ev_rt_now = ev_time ();
530	now = get_clock ();	1174	mn_now = get_clock ();
531	now_floor = now;	1175	now_floor = mn_now;
532	diff = ev_now - now;	1176	rtmn_diff = ev_rt_now - mn_now;
533		1177
534	if (pipe (sigpipe))	1178	io_blocktime = 0.;
535	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
536		1186
537	if (methods == EVMETHOD_AUTO)	1187	/* pid check not overridable via env */
538	if (!enable_secure () && getenv ("LIBEV_METHODS"))	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"))
539	methods = atoi (getenv ("LIBEV_METHODS"));	1196	flags = atoi (getenv ("LIBEV_FLAGS"));
540	else
541	methods = EVMETHOD_ANY;
542		1197
543	ev_method = 0;	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
544	#if EV_USE_EPOLL	1207	#if EV_USE_EPOLL
545	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	1208	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
546	#endif	1209	#endif
547	#if EV_USE_POLL	1210	#if EV_USE_POLL
548	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	1211	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
549	#endif	1212	#endif
550	#if EV_USE_SELECT	1213	#if EV_USE_SELECT
551	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	1214	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
552	#endif	1215	#endif
553		1216
554	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)
555	{	1238	{
556	ev_watcher_init (&sigev, sigcb);	1239	close (evpipe [0]);
557	siginit ();	1240	close (evpipe [1]);
		1241	}
		1242	}
558		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
559	ev_signal_init (&childev, childcb, SIGCHLD);	1399	ev_signal_init (&childev, childcb, SIGCHLD);
		1400	ev_set_priority (&childev, EV_MAXPRI);
560	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
561	}	1404	}
		1405	else
		1406	ev_default_loop_ptr = 0;
562	}	1407	}
563		1408
564	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 */
565	}	1436	}
566		1437
567	/*****************************************************************************/	1438	/*****************************************************************************/
568		1439
569	void	1440	void
570	ev_fork_prepare (void)	1441	ev_invoke (EV_P_ void *w, int revents)
571	{	1442	{
572	/* nop */	1443	EV_CB_INVOKE ((W)w, revents);
573	}	1444	}
574		1445
575	void	1446	void inline_speed
576	ev_fork_parent (void)
577	{
578	/* nop */
579	}
580
581	void
582	ev_fork_child (void)
583	{
584	#if EV_USE_EPOLL
585	if (ev_method == EVMETHOD_EPOLL)
586	epoll_postfork_child ();
587	#endif
588
589	ev_io_stop (&sigev);
590	close (sigpipe [0]);
591	close (sigpipe [1]);
592	pipe (sigpipe);
593	siginit ();
594	}
595
596	/*****************************************************************************/
597
598	static void
599	call_pending (void)	1447	call_pending (EV_P)
600	{	1448	{
601	int pri;	1449	int pri;
602		1450
603	for (pri = NUMPRI; pri--; )	1451	for (pri = NUMPRI; pri--; )
604	while (pendingcnt [pri])	1452	while (pendingcnt [pri])
605	{	1453	{
606	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1454	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
607		1455
608	if (p->w)	1456	if (expect_true (p->w))
609	{	1457	{
		1458	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1459
610	p->w->pending = 0;	1460	p->w->pending = 0;
611	p->w->cb (p->w, p->events);	1461	EV_CB_INVOKE (p->w, p->events);
612	}	1462	}
613	}	1463	}
614	}	1464	}
615		1465
616	static void	1466	void inline_size
617	timers_reify (void)	1467	timers_reify (EV_P)
618	{	1468	{
619	while (timercnt && timers [0]->at <= now)	1469	while (timercnt && ev_at (timers [1]) <= mn_now)
620	{	1470	{
621	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)));*/
622		1474
623	/* first reschedule or stop timer */	1475	/* first reschedule or stop timer */
624	if (w->repeat)	1476	if (w->repeat)
625	{	1477	{
626	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1478	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
627	w->at = now + w->repeat;	1479
		1480	ev_at (w) += w->repeat;
		1481	if (ev_at (w) < mn_now)
		1482	ev_at (w) = mn_now;
		1483
628	downheap ((WT *)timers, timercnt, 0);	1484	downheap (timers, timercnt, 1);
629	}	1485	}
630	else	1486	else
631	ev_timer_stop (w); /* nonrepeating: stop timer */	1487	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
632		1488
633	event ((W)w, EV_TIMEOUT);	1489	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
634	}	1490	}
635	}	1491	}
636		1492
637	static void	1493	#if EV_PERIODIC_ENABLE
		1494	void inline_size
638	periodics_reify (void)	1495	periodics_reify (EV_P)
639	{	1496	{
640	while (periodiccnt && periodics [0]->at <= ev_now)	1497	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
641	{	1498	{
642	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)));*/
643		1502
644	/* first reschedule or stop timer */	1503	/* first reschedule or stop timer */
645	if (w->interval)	1504	if (w->reschedule_cb)
646	{	1505	{
		1506	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1507	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1508	downheap (periodics, periodiccnt, 1);
		1509	}
		1510	else if (w->interval)
		1511	{
647	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	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;
648	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1514	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
649	downheap ((WT *)periodics, periodiccnt, 0);	1515	downheap (periodics, periodiccnt, 1);
650	}	1516	}
651	else	1517	else
652	ev_periodic_stop (w); /* nonrepeating: stop timer */	1518	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
653		1519
654	event ((W)w, EV_PERIODIC);	1520	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
655	}	1521	}
656	}	1522	}
657		1523
658	static void	1524	static void noinline
659	periodics_reschedule (ev_tstamp diff)	1525	periodics_reschedule (EV_P)
660	{	1526	{
661	int i;	1527	int i;
662		1528
663	/* adjust periodics after time jump */	1529	/* adjust periodics after time jump */
664	for (i = 0; i < periodiccnt; ++i)	1530	for (i = 1; i <= periodiccnt; ++i)
665	{	1531	{
666	struct ev_periodic *w = periodics [i];	1532	ev_periodic *w = (ev_periodic *)periodics [i];
667		1533
		1534	if (w->reschedule_cb)
		1535	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
668	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--; )
669	{	1555	{
670	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1556	if (pendingcnt [pri])
		1557	break;
671		1558
672	if (fabs (diff) >= 1e-4)	1559	if (idlecnt [pri])
673	{	1560	{
674	ev_periodic_stop (w);	1561	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
675	ev_periodic_start (w);	1562	break;
676
677	i = 0; /* restart loop, inefficient, but time jumps should be rare */
678	}	1563	}
679	}	1564	}
680	}	1565	}
681	}	1566	}
		1567	#endif
682		1568
683	static int	1569	void inline_speed
684	time_update_monotonic (void)	1570	time_update (EV_P_ ev_tstamp max_block)
685	{
686	now = get_clock ();
687
688	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
689	{
690	ev_now = now + diff;
691	return 0;
692	}
693	else
694	{
695	now_floor = now;
696	ev_now = ev_time ();
697	return 1;
698	}
699	}
700
701	static void
702	time_update (void)
703	{	1571	{
704	int i;	1572	int i;
705		1573
706	#if EV_USE_MONOTONIC	1574	#if EV_USE_MONOTONIC
707	if (expect_true (have_monotonic))	1575	if (expect_true (have_monotonic))
708	{	1576	{
709	if (time_update_monotonic ())	1577	ev_tstamp odiff = rtmn_diff;
		1578
		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))
710	{	1584	{
711	ev_tstamp odiff = diff;	1585	ev_rt_now = rtmn_diff + mn_now;
712		1586	return;
713	for (i = 4; --i; ) /* loop a few times, before making important decisions */
714	{
715	diff = ev_now - now;
716
717	if (fabs (odiff - diff) < MIN_TIMEJUMP)
718	return; /* all is well */
719
720	ev_now = ev_time ();
721	now = get_clock ();
722	now_floor = now;
723	}
724
725	periodics_reschedule (diff - odiff);
726	/* no timer adjustment, as the monotonic clock doesn't jump */
727	}	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	{
		1602	rtmn_diff = ev_rt_now - mn_now;
		1603
		1604	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1605	return; /* all is well */
		1606
		1607	ev_rt_now = ev_time ();
		1608	mn_now = get_clock ();
		1609	now_floor = mn_now;
		1610	}
		1611
		1612	# if EV_PERIODIC_ENABLE
		1613	periodics_reschedule (EV_A);
		1614	# endif
		1615	/* no timer adjustment, as the monotonic clock doesn't jump */
		1616	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
728	}	1617	}
729	else	1618	else
730	#endif	1619	#endif
731	{	1620	{
732	ev_now = ev_time ();	1621	ev_rt_now = ev_time ();
733		1622
734	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1623	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
735	{	1624	{
		1625	#if EV_PERIODIC_ENABLE
736	periodics_reschedule (ev_now - now);	1626	periodics_reschedule (EV_A);
737		1627	#endif
738	/* 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 */
739	for (i = 0; i < timercnt; ++i)	1629	for (i = 1; i <= timercnt; ++i)
740	timers [i]->at += diff;	1630	ev_at (timers [i]) += ev_rt_now - mn_now;
741	}	1631	}
742		1632
743	now = ev_now;	1633	mn_now = ev_rt_now;
744	}	1634	}
745	}	1635	}
746		1636
747	int ev_loop_done;	1637	void
		1638	ev_ref (EV_P)
		1639	{
		1640	++activecnt;
		1641	}
748		1642
		1643	void
		1644	ev_unref (EV_P)
		1645	{
		1646	--activecnt;
		1647	}
		1648
		1649	static int loop_done;
		1650
		1651	void
749	void ev_loop (int flags)	1652	ev_loop (EV_P_ int flags)
750	{	1653	{
751	double block;	1654	loop_done = EVUNLOOP_CANCEL;
752	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 */
753		1657
754	do	1658	do
755	{	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
756	/* queue check watchers (and execute them) */	1679	/* queue prepare watchers (and execute them) */
757	if (expect_false (preparecnt))	1680	if (expect_false (preparecnt))
758	{	1681	{
759	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1682	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
760	call_pending ();	1683	call_pending (EV_A);
761	}	1684	}
762		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
763	/* update fd-related kernel structures */	1693	/* update fd-related kernel structures */
764	fd_reify ();	1694	fd_reify (EV_A);
765		1695
766	/* calculate blocking time */	1696	/* calculate blocking time */
		1697	{
		1698	ev_tstamp waittime = 0.;
		1699	ev_tstamp sleeptime = 0.;
767		1700
768	/* we only need this for !monotonic clockor timers, but as we basically	1701	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
769	always have timers, we just calculate it always */
770	#if EV_USE_MONOTONIC
771	if (expect_true (have_monotonic))
772	time_update_monotonic ();
773	else
774	#endif
775	{	1702	{
776	ev_now = ev_time ();	1703	/* update time to cancel out callback processing overhead */
777	now = ev_now;	1704	time_update (EV_A_ 1e100);
778	}
779		1705
780	if (flags & EVLOOP_NONBLOCK || idlecnt)
781	block = 0.;
782	else
783	{
784	block = MAX_BLOCKTIME;	1706	waittime = MAX_BLOCKTIME;
785		1707
786	if (timercnt)	1708	if (timercnt)
787	{	1709	{
788	ev_tstamp to = timers [0]->at - now + method_fudge;	1710	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
789	if (block > to) block = to;	1711	if (waittime > to) waittime = to;
790	}	1712	}
791		1713
		1714	#if EV_PERIODIC_ENABLE
792	if (periodiccnt)	1715	if (periodiccnt)
793	{	1716	{
794	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1717	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
795	if (block > to) block = to;	1718	if (waittime > to) waittime = to;
796	}	1719	}
		1720	#endif
797		1721
798	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	}
799	}	1735	}
800		1736
801	method_poll (block);	1737	++loop_count;
		1738	backend_poll (EV_A_ waittime);
802		1739
803	/* update ev_now, do magic */	1740	/* update ev_rt_now, do magic */
804	time_update ();	1741	time_update (EV_A_ waittime + sleeptime);
		1742	}
805		1743
806	/* queue pending timers and reschedule them */	1744	/* queue pending timers and reschedule them */
807	timers_reify (); /* relative timers called last */	1745	timers_reify (EV_A); /* relative timers called last */
		1746	#if EV_PERIODIC_ENABLE
808	periodics_reify (); /* absolute timers called first */	1747	periodics_reify (EV_A); /* absolute timers called first */
		1748	#endif
809		1749
		1750	#if EV_IDLE_ENABLE
810	/* queue idle watchers unless io or timers are pending */	1751	/* queue idle watchers unless other events are pending */
811	if (!pendingcnt)	1752	idle_reify (EV_A);
812	queue_events ((W *)idles, idlecnt, EV_IDLE);	1753	#endif
813		1754
814	/* queue check watchers, to be executed first */	1755	/* queue check watchers, to be executed first */
815	if (checkcnt)	1756	if (expect_false (checkcnt))
816	queue_events ((W *)checks, checkcnt, EV_CHECK);	1757	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
817		1758
818	call_pending ();	1759	call_pending (EV_A);
819	}	1760	}
820	while (!ev_loop_done);	1761	while (expect_true (
		1762	activecnt
		1763	&& !loop_done
		1764	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1765	));
821		1766
822	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	{
823	ev_loop_done = 0;	1774	loop_done = how;
824	}	1775	}
825		1776
826	/*****************************************************************************/	1777	/*****************************************************************************/
827		1778
828	static void	1779	void inline_size
829	wlist_add (WL *head, WL elem)	1780	wlist_add (WL *head, WL elem)
830	{	1781	{
831	elem->next = *head;	1782	elem->next = *head;
832	*head = elem;	1783	*head = elem;
833	}	1784	}
834		1785
835	static void	1786	void inline_size
836	wlist_del (WL *head, WL elem)	1787	wlist_del (WL *head, WL elem)
837	{	1788	{
838	while (*head)	1789	while (*head)
839	{	1790	{
840	if (*head == elem)	1791	if (*head == elem)
…		…
845		1796
846	head = &(*head)->next;	1797	head = &(*head)->next;
847	}	1798	}
848	}	1799	}
849		1800
850	static void	1801	void inline_speed
851	ev_clear_pending (W w)	1802	clear_pending (EV_P_ W w)
852	{	1803	{
853	if (w->pending)	1804	if (w->pending)
854	{	1805	{
855	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1806	pendings [ABSPRI (w)][w->pending - 1].w = 0;
856	w->pending = 0;	1807	w->pending = 0;
857	}	1808	}
858	}	1809	}
859		1810
860	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
861	ev_start (W w, int active)	1838	ev_start (EV_P_ W w, int active)
862	{	1839	{
863	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1840	pri_adjust (EV_A_ w);
864	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
865
866	w->active = active;	1841	w->active = active;
		1842	ev_ref (EV_A);
867	}	1843	}
868		1844
869	static void	1845	void inline_size
870	ev_stop (W w)	1846	ev_stop (EV_P_ W w)
871	{	1847	{
		1848	ev_unref (EV_A);
872	w->active = 0;	1849	w->active = 0;
873	}	1850	}
874		1851
875	/*****************************************************************************/	1852	/*****************************************************************************/
876		1853
877	void	1854	void noinline
878	ev_io_start (struct ev_io *w)	1855	ev_io_start (EV_P_ ev_io *w)
879	{	1856	{
880	int fd = w->fd;	1857	int fd = w->fd;
881		1858
882	if (ev_is_active (w))	1859	if (expect_false (ev_is_active (w)))
883	return;	1860	return;
884		1861
885	assert (("ev_io_start called with negative fd", fd >= 0));	1862	assert (("ev_io_start called with negative fd", fd >= 0));
886		1863
887	ev_start ((W)w, 1);	1864	ev_start (EV_A_ (W)w, 1);
888	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1865	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
889	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1866	wlist_add (&anfds[fd].head, (WL)w);
890		1867
891	fd_change (fd);	1868	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1869	w->events &= ~EV_IOFDSET;
892	}	1870	}
893		1871
894	void	1872	void noinline
895	ev_io_stop (struct ev_io *w)	1873	ev_io_stop (EV_P_ ev_io *w)
896	{	1874	{
897	ev_clear_pending ((W)w);	1875	clear_pending (EV_A_ (W)w);
898	if (!ev_is_active (w))	1876	if (expect_false (!ev_is_active (w)))
899	return;	1877	return;
900		1878
		1879	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1880
901	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1881	wlist_del (&anfds[w->fd].head, (WL)w);
902	ev_stop ((W)w);	1882	ev_stop (EV_A_ (W)w);
903		1883
904	fd_change (w->fd);	1884	fd_change (EV_A_ w->fd, 1);
905	}	1885	}
906		1886
907	void	1887	void noinline
908	ev_timer_start (struct ev_timer *w)	1888	ev_timer_start (EV_P_ ev_timer *w)
909	{	1889	{
910	if (ev_is_active (w))	1890	if (expect_false (ev_is_active (w)))
911	return;	1891	return;
912		1892
913	w->at += now;	1893	ev_at (w) += mn_now;
914		1894
915	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1895	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
916		1896
917	ev_start ((W)w, ++timercnt);	1897	ev_start (EV_A_ (W)w, ++timercnt);
918	array_needsize (timers, timermax, timercnt, );	1898	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
919	timers [timercnt - 1] = w;	1899	timers [timercnt] = (WT)w;
920	upheap ((WT *)timers, timercnt - 1);	1900	upheap (timers, timercnt);
921	}
922		1901
923	void	1902	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		1903	}
		1904
		1905	void noinline
924	ev_timer_stop (struct ev_timer *w)	1906	ev_timer_stop (EV_P_ ev_timer *w)
925	{	1907	{
926	ev_clear_pending ((W)w);	1908	clear_pending (EV_A_ (W)w);
927	if (!ev_is_active (w))	1909	if (expect_false (!ev_is_active (w)))
928	return;	1910	return;
929		1911
930	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))
931	{	1918	{
932	timers [w->active - 1] = timers [timercnt];	1919	timers [active] = timers [timercnt];
933	downheap ((WT *)timers, timercnt, w->active - 1);	1920	adjustheap (timers, timercnt, active);
934	}	1921	}
935		1922
936	w->at = w->repeat;	1923	--timercnt;
		1924	}
937		1925
		1926	ev_at (w) -= mn_now;
		1927
938	ev_stop ((W)w);	1928	ev_stop (EV_A_ (W)w);
939	}	1929	}
940		1930
941	void	1931	void noinline
942	ev_timer_again (struct ev_timer *w)	1932	ev_timer_again (EV_P_ ev_timer *w)
943	{	1933	{
944	if (ev_is_active (w))	1934	if (ev_is_active (w))
945	{	1935	{
946	if (w->repeat)	1936	if (w->repeat)
947	{	1937	{
948	w->at = now + w->repeat;	1938	ev_at (w) = mn_now + w->repeat;
949	downheap ((WT *)timers, timercnt, w->active - 1);	1939	adjustheap (timers, timercnt, ev_active (w));
950	}	1940	}
951	else	1941	else
952	ev_timer_stop (w);	1942	ev_timer_stop (EV_A_ w);
953	}	1943	}
954	else if (w->repeat)	1944	else if (w->repeat)
		1945	{
		1946	ev_at (w) = w->repeat;
955	ev_timer_start (w);	1947	ev_timer_start (EV_A_ w);
		1948	}
956	}	1949	}
957		1950
958	void	1951	#if EV_PERIODIC_ENABLE
		1952	void noinline
959	ev_periodic_start (struct ev_periodic *w)	1953	ev_periodic_start (EV_P_ ev_periodic *w)
960	{	1954	{
961	if (ev_is_active (w))	1955	if (expect_false (ev_is_active (w)))
962	return;	1956	return;
963		1957
		1958	if (w->reschedule_cb)
		1959	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1960	else if (w->interval)
		1961	{
964	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1962	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
965
966	/* 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 */
967	if (w->interval)
968	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;
969		1968
970	ev_start ((W)w, ++periodiccnt);	1969	ev_start (EV_A_ (W)w, ++periodiccnt);
971	array_needsize (periodics, periodicmax, periodiccnt, );	1970	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
972	periodics [periodiccnt - 1] = w;	1971	periodics [periodiccnt] = (WT)w;
973	upheap ((WT *)periodics, periodiccnt - 1);	1972	upheap (periodics, periodiccnt);
974	}
975		1973
976	void	1974	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
		1975	}
		1976
		1977	void noinline
977	ev_periodic_stop (struct ev_periodic *w)	1978	ev_periodic_stop (EV_P_ ev_periodic *w)
978	{	1979	{
979	ev_clear_pending ((W)w);	1980	clear_pending (EV_A_ (W)w);
980	if (!ev_is_active (w))	1981	if (expect_false (!ev_is_active (w)))
981	return;	1982	return;
982		1983
983	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))
984	{	1990	{
985	periodics [w->active - 1] = periodics [periodiccnt];	1991	periodics [active] = periodics [periodiccnt];
986	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1992	adjustheap (periodics, periodiccnt, active);
987	}	1993	}
988		1994
		1995	--periodiccnt;
		1996	}
		1997
989	ev_stop ((W)w);	1998	ev_stop (EV_A_ (W)w);
990	}	1999	}
991		2000
992	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
993	ev_signal_start (struct ev_signal *w)	2015	ev_signal_start (EV_P_ ev_signal *w)
994	{	2016	{
		2017	#if EV_MULTIPLICITY
		2018	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2019	#endif
995	if (ev_is_active (w))	2020	if (expect_false (ev_is_active (w)))
996	return;	2021	return;
997		2022
998	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2023	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
999		2024
1000	ev_start ((W)w, 1);	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
1001	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);
1002	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2042	wlist_add (&signals [w->signum - 1].head, (WL)w);
1003		2043
1004	if (!w->next)	2044	if (!((WL)w)->next)
1005	{	2045	{
		2046	#if _WIN32
		2047	signal (w->signum, ev_sighandler);
		2048	#else
1006	struct sigaction sa;	2049	struct sigaction sa;
1007	sa.sa_handler = sighandler;	2050	sa.sa_handler = ev_sighandler;
1008	sigfillset (&sa.sa_mask);	2051	sigfillset (&sa.sa_mask);
1009	sa.sa_flags = 0;	2052	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1010	sigaction (w->signum, &sa, 0);	2053	sigaction (w->signum, &sa, 0);
		2054	#endif
1011	}	2055	}
1012	}	2056	}
1013		2057
1014	void	2058	void noinline
1015	ev_signal_stop (struct ev_signal *w)	2059	ev_signal_stop (EV_P_ ev_signal *w)
1016	{	2060	{
1017	ev_clear_pending ((W)w);	2061	clear_pending (EV_A_ (W)w);
1018	if (!ev_is_active (w))	2062	if (expect_false (!ev_is_active (w)))
1019	return;	2063	return;
1020		2064
1021	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2065	wlist_del (&signals [w->signum - 1].head, (WL)w);
1022	ev_stop ((W)w);	2066	ev_stop (EV_A_ (W)w);
1023		2067
1024	if (!signals [w->signum - 1].head)	2068	if (!signals [w->signum - 1].head)
1025	signal (w->signum, SIG_DFL);	2069	signal (w->signum, SIG_DFL);
1026	}	2070	}
1027		2071
1028	void	2072	void
1029	ev_idle_start (struct ev_idle *w)	2073	ev_child_start (EV_P_ ev_child *w)
1030	{	2074	{
		2075	#if EV_MULTIPLICITY
		2076	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2077	#endif
1031	if (ev_is_active (w))	2078	if (expect_false (ev_is_active (w)))
1032	return;	2079	return;
1033		2080
1034	ev_start ((W)w, ++idlecnt);	2081	ev_start (EV_A_ (W)w, 1);
1035	array_needsize (idles, idlemax, idlecnt, );	2082	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1036	idles [idlecnt - 1] = w;
1037	}	2083	}
1038		2084
1039	void	2085	void
1040	ev_idle_stop (struct ev_idle *w)	2086	ev_child_stop (EV_P_ ev_child *w)
1041	{	2087	{
1042	ev_clear_pending ((W)w);	2088	clear_pending (EV_A_ (W)w);
1043	if (ev_is_active (w))	2089	if (expect_false (!ev_is_active (w)))
1044	return;	2090	return;
1045		2091
1046	idles [w->active - 1] = idles [--idlecnt];	2092	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1047	ev_stop ((W)w);	2093	ev_stop (EV_A_ (W)w);
1048	}	2094	}
1049		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
1050	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
1051	ev_prepare_start (struct ev_prepare *w)	2389	ev_prepare_start (EV_P_ ev_prepare *w)
1052	{	2390	{
1053	if (ev_is_active (w))	2391	if (expect_false (ev_is_active (w)))
1054	return;	2392	return;
1055		2393
1056	ev_start ((W)w, ++preparecnt);	2394	ev_start (EV_A_ (W)w, ++preparecnt);
1057	array_needsize (prepares, preparemax, preparecnt, );	2395	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1058	prepares [preparecnt - 1] = w;	2396	prepares [preparecnt - 1] = w;
1059	}	2397	}
1060		2398
1061	void	2399	void
1062	ev_prepare_stop (struct ev_prepare *w)	2400	ev_prepare_stop (EV_P_ ev_prepare *w)
1063	{	2401	{
1064	ev_clear_pending ((W)w);	2402	clear_pending (EV_A_ (W)w);
1065	if (ev_is_active (w))	2403	if (expect_false (!ev_is_active (w)))
1066	return;	2404	return;
1067		2405
		2406	{
		2407	int active = ev_active (w);
		2408
1068	prepares [w->active - 1] = prepares [--preparecnt];	2409	prepares [active - 1] = prepares [--preparecnt];
		2410	ev_active (prepares [active - 1]) = active;
		2411	}
		2412
1069	ev_stop ((W)w);	2413	ev_stop (EV_A_ (W)w);
1070	}	2414	}
1071		2415
1072	void	2416	void
1073	ev_check_start (struct ev_check *w)	2417	ev_check_start (EV_P_ ev_check *w)
1074	{	2418	{
1075	if (ev_is_active (w))	2419	if (expect_false (ev_is_active (w)))
1076	return;	2420	return;
1077		2421
1078	ev_start ((W)w, ++checkcnt);	2422	ev_start (EV_A_ (W)w, ++checkcnt);
1079	array_needsize (checks, checkmax, checkcnt, );	2423	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1080	checks [checkcnt - 1] = w;	2424	checks [checkcnt - 1] = w;
1081	}	2425	}
1082		2426
1083	void	2427	void
1084	ev_check_stop (struct ev_check *w)	2428	ev_check_stop (EV_P_ ev_check *w)
1085	{	2429	{
1086	ev_clear_pending ((W)w);	2430	clear_pending (EV_A_ (W)w);
1087	if (ev_is_active (w))	2431	if (expect_false (!ev_is_active (w)))
1088	return;	2432	return;
1089		2433
		2434	{
		2435	int active = ev_active (w);
		2436
1090	checks [w->active - 1] = checks [--checkcnt];	2437	checks [active - 1] = checks [--checkcnt];
		2438	ev_active (checks [active - 1]) = active;
		2439	}
		2440
1091	ev_stop ((W)w);	2441	ev_stop (EV_A_ (W)w);
1092	}	2442	}
1093		2443
1094	void	2444	#if EV_EMBED_ENABLE
1095	ev_child_start (struct ev_child *w)	2445	void noinline
		2446	ev_embed_sweep (EV_P_ ev_embed *w)
1096	{	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
1097	if (ev_is_active (w))	2456	if (ev_cb (w))
1098	return;	2457	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2458	else
		2459	ev_loop (w->other, EVLOOP_NONBLOCK);
		2460	}
1099		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
1100	ev_start ((W)w, 1);	2507	ev_start (EV_A_ (W)w, 1);
1101	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1102	}	2508	}
1103		2509
1104	void	2510	void
1105	ev_child_stop (struct ev_child *w)	2511	ev_embed_stop (EV_P_ ev_embed *w)
1106	{	2512	{
1107	ev_clear_pending ((W)w);	2513	clear_pending (EV_A_ (W)w);
1108	if (ev_is_active (w))	2514	if (expect_false (!ev_is_active (w)))
1109	return;	2515	return;
1110		2516
1111	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
1112	ev_stop ((W)w);	2520	ev_stop (EV_A_ (W)w);
1113	}	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
1114		2592
1115	/*****************************************************************************/	2593	/*****************************************************************************/
1116		2594
1117	struct ev_once	2595	struct ev_once
1118	{	2596	{
1119	struct ev_io io;	2597	ev_io io;
1120	struct ev_timer to;	2598	ev_timer to;
1121	void (*cb)(int revents, void *arg);	2599	void (*cb)(int revents, void *arg);
1122	void *arg;	2600	void *arg;
1123	};	2601	};
1124		2602
1125	static void	2603	static void
1126	once_cb (struct ev_once *once, int revents)	2604	once_cb (EV_P_ struct ev_once *once, int revents)
1127	{	2605	{
1128	void (*cb)(int revents, void *arg) = once->cb;	2606	void (*cb)(int revents, void *arg) = once->cb;
1129	void *arg = once->arg;	2607	void *arg = once->arg;
1130		2608
1131	ev_io_stop (&once->io);	2609	ev_io_stop (EV_A_ &once->io);
1132	ev_timer_stop (&once->to);	2610	ev_timer_stop (EV_A_ &once->to);
1133	free (once);	2611	ev_free (once);
1134		2612
1135	cb (revents, arg);	2613	cb (revents, arg);
1136	}	2614	}
1137		2615
1138	static void	2616	static void
1139	once_cb_io (struct ev_io *w, int revents)	2617	once_cb_io (EV_P_ ev_io *w, int revents)
1140	{	2618	{
1141	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);
1142	}	2620	}
1143		2621
1144	static void	2622	static void
1145	once_cb_to (struct ev_timer *w, int revents)	2623	once_cb_to (EV_P_ ev_timer *w, int revents)
1146	{	2624	{
1147	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);
1148	}	2626	}
1149		2627
1150	void	2628	void
1151	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)
1152	{	2630	{
1153	struct ev_once *once = malloc (sizeof (struct ev_once));	2631	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1154		2632
1155	if (!once)	2633	if (expect_false (!once))
		2634	{
1156	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2635	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1157	else	2636	return;
1158	{	2637	}
		2638
1159	once->cb = cb;	2639	once->cb = cb;
1160	once->arg = arg;	2640	once->arg = arg;
1161		2641
1162	ev_watcher_init (&once->io, once_cb_io);	2642	ev_init (&once->io, once_cb_io);
1163	if (fd >= 0)	2643	if (fd >= 0)
1164	{	2644	{
1165	ev_io_set (&once->io, fd, events);	2645	ev_io_set (&once->io, fd, events);
1166	ev_io_start (&once->io);	2646	ev_io_start (EV_A_ &once->io);
1167	}	2647	}
1168		2648
1169	ev_watcher_init (&once->to, once_cb_to);	2649	ev_init (&once->to, once_cb_to);
1170	if (timeout >= 0.)	2650	if (timeout >= 0.)
1171	{	2651	{
1172	ev_timer_set (&once->to, timeout, 0.);	2652	ev_timer_set (&once->to, timeout, 0.);
1173	ev_timer_start (&once->to);	2653	ev_timer_start (EV_A_ &once->to);
1174	}
1175	}
1176	}
1177
1178	/*****************************************************************************/
1179
1180	#if 0
1181
1182	struct ev_io wio;
1183
1184	static void
1185	sin_cb (struct ev_io *w, int revents)
1186	{
1187	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1188	}
1189
1190	static void
1191	ocb (struct ev_timer *w, int revents)
1192	{
1193	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1194	ev_timer_stop (w);
1195	ev_timer_start (w);
1196	}
1197
1198	static void
1199	scb (struct ev_signal *w, int revents)
1200	{
1201	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1202	ev_io_stop (&wio);
1203	ev_io_start (&wio);
1204	}
1205
1206	static void
1207	gcb (struct ev_signal *w, int revents)
1208	{
1209	fprintf (stderr, "generic %x\n", revents);
1210
1211	}
1212
1213	int main (void)
1214	{
1215	ev_init (0);
1216
1217	ev_io_init (&wio, sin_cb, 0, EV_READ);
1218	ev_io_start (&wio);
1219
1220	struct ev_timer t[10000];
1221
1222	#if 0
1223	int i;
1224	for (i = 0; i < 10000; ++i)
1225	{	2654	}
1226	struct ev_timer *w = t + i;
1227	ev_watcher_init (w, ocb, i);
1228	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1229	ev_timer_start (w);
1230	if (drand48 () < 0.5)
1231	ev_timer_stop (w);
1232	}
1233	#endif
1234
1235	struct ev_timer t1;
1236	ev_timer_init (&t1, ocb, 5, 10);
1237	ev_timer_start (&t1);
1238
1239	struct ev_signal sig;
1240	ev_signal_init (&sig, scb, SIGQUIT);
1241	ev_signal_start (&sig);
1242
1243	struct ev_check cw;
1244	ev_check_init (&cw, gcb);
1245	ev_check_start (&cw);
1246
1247	struct ev_idle iw;
1248	ev_idle_init (&iw, gcb);
1249	ev_idle_start (&iw);
1250
1251	ev_loop (0);
1252
1253	return 0;
1254	}	2655	}
1255		2656
		2657	#if EV_MULTIPLICITY
		2658	#include "ev_wrap.h"
1256	#endif	2659	#endif
1257		2660
		2661	#ifdef __cplusplus
		2662	}
		2663	#endif
1258		2664
1259
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