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Comparing libev/ev.c (file contents):
Revision 1.46 by root, Sat Nov 3 09:20:12 2007 UTC vs.
Revision 1.234 by root, Tue May 6 23:42:16 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	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>
		144	#include <time.h>
		145
		146	#include <signal.h>
		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
47	#ifndef WIN32	154	#ifndef _WIN32
		155	# include <sys/time.h>
48	# include <sys/wait.h>	156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
49	#endif	163	# endif
50	#include <sys/time.h>	164	#endif
51	#include <time.h>
52		165
53	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
54		167
55	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
56	# 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
57	#endif	178	#endif
58		179
59	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
60	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
61	#endif	182	#endif
62		183
63	#ifndef EV_USE_POLL	184	#ifndef EV_USE_POLL
64	# 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
65	#endif	190	#endif
66		191
67	#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
68	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
69	#endif	198	#endif
70		199
71	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
73	#endif	202	#endif
74		203
75	#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))
76	# define EV_USE_REALTIME 1	210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
77	#endif	213	# endif
		214	#endif
78		215
79	/**/	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 */
80		241
81	#ifndef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
82	# undef EV_USE_MONOTONIC	243	# undef EV_USE_MONOTONIC
83	# define EV_USE_MONOTONIC 0	244	# define EV_USE_MONOTONIC 0
84	#endif	245	#endif
…		…
86	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
87	# undef EV_USE_REALTIME	248	# undef EV_USE_REALTIME
88	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
89	#endif	250	#endif
90		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
91	/**/	283	/**/
92		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
93	#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) */
94	#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) */
95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96	/*#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 */
97		298
98	#include "ev.h"
99
100	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
101	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
102	# define inline inline	301	# define noinline __attribute__ ((noinline))
103	#else	302	#else
104	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
105	# define inline static	304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
106	#endif	308	#endif
107		309
108	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
109	#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
110		319
111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
113		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
114	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
117		329
118	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
119	ev_tstamp ev_now;	450	ev_tstamp ev_rt_now;
120	int ev_method;	451	#define VAR(name,decl) static decl;
		452	#include "ev_vars.h"
		453	#undef VAR
121		454
122	static int have_monotonic; /* runtime */	455	static int ev_default_loop_ptr;
123		456
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	457	#endif
125	static void (*method_modify)(int fd, int oev, int nev);
126	static void (*method_poll)(ev_tstamp timeout);
127		458
128	/*****************************************************************************/	459	/*****************************************************************************/
129		460
130	ev_tstamp	461	ev_tstamp
131	ev_time (void)	462	ev_time (void)
…		…
139	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
140	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
141	#endif	472	#endif
142	}	473	}
143		474
144	static ev_tstamp	475	ev_tstamp inline_size
145	get_clock (void)	476	get_clock (void)
146	{	477	{
147	#if EV_USE_MONOTONIC	478	#if EV_USE_MONOTONIC
148	if (expect_true (have_monotonic))	479	if (expect_true (have_monotonic))
149	{	480	{
…		…
154	#endif	485	#endif
155		486
156	return ev_time ();	487	return ev_time ();
157	}	488	}
158		489
159	#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
160		497
161	#define array_needsize(base,cur,cnt,init) \	498	void
162	if (expect_false ((cnt) > cur)) \	499	ev_sleep (ev_tstamp delay)
163	{ \	500	{
164	int newcnt = cur; \	501	if (delay > 0.)
165	do \
166	{ \
167	newcnt = array_roundsize (base, newcnt << 1); \
168	} \
169	while ((cnt) > newcnt); \
170	\
171	base = realloc (base, sizeof (*base) * (newcnt)); \
172	init (base + cur, newcnt - cur); \
173	cur = newcnt; \
174	}	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	}
175		522
176	/*****************************************************************************/	523	/*****************************************************************************/
177		524
178	typedef struct	525	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
179	{
180	struct ev_io *head;
181	unsigned char events;
182	unsigned char reify;
183	} ANFD;
184		526
185	static ANFD *anfds;	527	int inline_size
186	static int anfdmax;	528	array_nextsize (int elem, int cur, int cnt)
		529	{
		530	int ncur = cur + 1;
187		531
188	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
189	anfds_init (ANFD *base, int count)	608	anfds_init (ANFD *base, int count)
190	{	609	{
191	while (count--)	610	while (count--)
192	{	611	{
193	base->head = 0;	612	base->head = 0;
…		…
196		615
197	++base;	616	++base;
198	}	617	}
199	}	618	}
200		619
201	typedef struct	620	void inline_speed
202	{
203	W w;
204	int events;
205	} ANPENDING;
206
207	static ANPENDING *pendings [NUMPRI];
208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210	static void
211	event (W w, int events)
212	{
213	if (w->pending)
214	{
215	pendings [ABSPRI (w)][w->pending - 1].events |= events;
216	return;
217	}
218
219	w->pending = ++pendingcnt [ABSPRI (w)];
220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
221	pendings [ABSPRI (w)][w->pending - 1].w = w;
222	pendings [ABSPRI (w)][w->pending - 1].events = events;
223	}
224
225	static void
226	queue_events (W *events, int eventcnt, int type)
227	{
228	int i;
229
230	for (i = 0; i < eventcnt; ++i)
231	event (events [i], type);
232	}
233
234	static void
235	fd_event (int fd, int events)	621	fd_event (EV_P_ int fd, int revents)
236	{	622	{
237	ANFD *anfd = anfds + fd;	623	ANFD *anfd = anfds + fd;
238	struct ev_io *w;	624	ev_io *w;
239		625
240	for (w = anfd->head; w; w = w->next)	626	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
241	{	627	{
242	int ev = w->events & events;	628	int ev = w->events & revents;
243		629
244	if (ev)	630	if (ev)
245	event ((W)w, ev);	631	ev_feed_event (EV_A_ (W)w, ev);
246	}	632	}
247	}	633	}
248		634
249	/*****************************************************************************/	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	}
250		641
251	static int *fdchanges;	642	void inline_size
252	static int fdchangemax, fdchangecnt;	643	fd_reify (EV_P)
253
254	static void
255	fd_reify (void)
256	{	644	{
257	int i;	645	int i;
258		646
259	for (i = 0; i < fdchangecnt; ++i)	647	for (i = 0; i < fdchangecnt; ++i)
260	{	648	{
261	int fd = fdchanges [i];	649	int fd = fdchanges [i];
262	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
263	struct ev_io *w;	651	ev_io *w;
264		652
265	int events = 0;	653	unsigned char events = 0;
266		654
267	for (w = anfd->head; w; w = w->next)	655	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
268	events |= w->events;	656	events |= (unsigned char)w->events;
269		657
270	anfd->reify = 0;	658	#if EV_SELECT_IS_WINSOCKET
271		659	if (events)
272	if (anfd->events != events)
273	{	660	{
274	method_modify (fd, anfd->events, events);	661	unsigned long argp;
275	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));
276	}	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	}
277	}	681	}
278		682
279	fdchangecnt = 0;	683	fdchangecnt = 0;
280	}	684	}
281		685
282	static void	686	void inline_size
283	fd_change (int fd)	687	fd_change (EV_P_ int fd, int flags)
284	{	688	{
285	if (anfds [fd].reify || fdchangecnt < 0)	689	unsigned char reify = anfds [fd].reify;
286	return;
287
288	anfds [fd].reify = 1;	690	anfds [fd].reify |= flags;
289		691
		692	if (expect_true (!reify))
		693	{
290	++fdchangecnt;	694	++fdchangecnt;
291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
292	fdchanges [fdchangecnt - 1] = fd;	696	fdchanges [fdchangecnt - 1] = fd;
		697	}
293	}	698	}
294		699
295	static void	700	void inline_speed
296	fd_kill (int fd)	701	fd_kill (EV_P_ int fd)
297	{	702	{
298	struct ev_io *w;	703	ev_io *w;
299		704
300	printf ("killing fd %d\n", fd);//D
301	while ((w = anfds [fd].head))	705	while ((w = (ev_io *)anfds [fd].head))
302	{	706	{
303	ev_io_stop (w);	707	ev_io_stop (EV_A_ w);
304	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);	708	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
305	}	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
306	}	720	}
307		721
308	/* called on EBADF to verify fds */	722	/* called on EBADF to verify fds */
309	static void	723	static void noinline
310	fd_ebadf (void)	724	fd_ebadf (EV_P)
311	{	725	{
312	int fd;	726	int fd;
313		727
314	for (fd = 0; fd < anfdmax; ++fd)	728	for (fd = 0; fd < anfdmax; ++fd)
315	if (anfds [fd].events)	729	if (anfds [fd].events)
316	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	730	if (!fd_valid (fd) == -1 && errno == EBADF)
317	fd_kill (fd);	731	fd_kill (EV_A_ fd);
318	}	732	}
319		733
320	/* 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 */
321	static void	735	static void noinline
322	fd_enomem (void)	736	fd_enomem (EV_P)
323	{	737	{
324	int fd = anfdmax;	738	int fd;
325		739
326	while (fd--)	740	for (fd = anfdmax; fd--; )
327	if (anfds [fd].events)	741	if (anfds [fd].events)
328	{	742	{
329	close (fd);
330	fd_kill (fd);	743	fd_kill (EV_A_ fd);
331	return;	744	return;
332	}	745	}
333	}	746	}
334		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
335	/*****************************************************************************/	762	/*****************************************************************************/
336		763
337	static struct ev_timer **timers;	764	/* towards the root */
338	static int timermax, timercnt;	765	void inline_speed
339
340	static struct ev_periodic **periodics;
341	static int periodicmax, periodiccnt;
342
343	static void
344	upheap (WT *timers, int k)	766	upheap (WT *heap, int k)
345	{	767	{
346	WT w = timers [k];	768	WT w = heap [k];
347		769
348	while (k && timers [k >> 1]->at > w->at)	770	for (;;)
349	{
350	timers [k] = timers [k >> 1];
351	timers [k]->active = k + 1;
352	k >>= 1;
353	}	771	{
354
355	timers [k] = w;
356	timers [k]->active = k + 1;
357
358	}
359
360	static void
361	downheap (WT *timers, int N, int k)
362	{
363	WT w = timers [k];
364
365	while (k < (N >> 1))
366	{
367	int j = k << 1;	772	int p = k >> 1;
368		773
369	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	774	/* maybe we could use a dummy element at heap [0]? */
370	++j;	775	if (!p || heap [p]->at <= w->at)
371
372	if (w->at <= timers [j]->at)
373	break;	776	break;
374		777
375	timers [k] = timers [j];	778	heap [k] = heap [p];
376	timers [k]->active = k + 1;	779	ev_active (heap [k]) = k;
377	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 (;;)
378	}	794	{
		795	int c = k << 1;
379		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
380	timers [k] = w;	812	heap [k] = w;
381	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);
382	}	821	}
383		822
384	/*****************************************************************************/	823	/*****************************************************************************/
385		824
386	typedef struct	825	typedef struct
387	{	826	{
388	struct ev_signal *head;	827	WL head;
389	sig_atomic_t volatile gotsig;	828	EV_ATOMIC_T gotsig;
390	} ANSIG;	829	} ANSIG;
391		830
392	static ANSIG *signals;	831	static ANSIG *signals;
393	static int signalmax;	832	static int signalmax;
394		833
395	static int sigpipe [2];	834	static EV_ATOMIC_T gotsig;
396	static sig_atomic_t volatile gotsig;
397	static struct ev_io sigev;
398		835
399	static void	836	void inline_size
400	signals_init (ANSIG *base, int count)	837	signals_init (ANSIG *base, int count)
401	{	838	{
402	while (count--)	839	while (count--)
403	{	840	{
404	base->head = 0;	841	base->head = 0;
…		…
406		843
407	++base;	844	++base;
408	}	845	}
409	}	846	}
410		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
411	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
412	sighandler (int signum)	958	ev_sighandler (int signum)
413	{	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
414	signals [signum - 1].gotsig = 1;	968	signals [signum - 1].gotsig = 1;
415		969	evpipe_write (EV_A_ &gotsig);
416	if (!gotsig)
417	{
418	gotsig = 1;
419	write (sigpipe [1], &signum, 1);
420	}
421	}	970	}
422		971
423	static void	972	void noinline
424	sigcb (struct ev_io *iow, int revents)	973	ev_feed_signal_event (EV_P_ int signum)
425	{	974	{
426	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
427	int signum;	981	--signum;
428		982
429	read (sigpipe [0], &revents, 1);	983	if (signum < 0 || signum >= signalmax)
430	gotsig = 0;	984	return;
431		985
432	for (signum = signalmax; signum--; )
433	if (signals [signum].gotsig)
434	{
435	signals [signum].gotsig = 0;	986	signals [signum].gotsig = 0;
436		987
437	for (w = signals [signum].head; w; w = w->next)	988	for (w = signals [signum].head; w; w = w->next)
438	event ((W)w, EV_SIGNAL);	989	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
439	}
440	}
441
442	static void
443	siginit (void)
444	{
445	#ifndef WIN32
446	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
447	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
448
449	/* rather than sort out wether we really need nb, set it */
450	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
451	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
452	#endif
453
454	ev_io_set (&sigev, sigpipe [0], EV_READ);
455	ev_io_start (&sigev);
456	}	990	}
457		991
458	/*****************************************************************************/	992	/*****************************************************************************/
459		993
460	static struct ev_idle **idles;	994	static WL childs [EV_PID_HASHSIZE];
461	static int idlemax, idlecnt;
462		995
463	static struct ev_prepare **prepares;
464	static int preparemax, preparecnt;
465
466	static struct ev_check **checks;
467	static int checkmax, checkcnt;
468
469	/*****************************************************************************/
470
471	static struct ev_child *childs [PID_HASHSIZE];
472	static struct ev_signal childev;
473
474	#ifndef WIN32	996	#ifndef _WIN32
		997
		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	}
475		1022
476	#ifndef WCONTINUED	1023	#ifndef WCONTINUED
477	# define WCONTINUED 0	1024	# define WCONTINUED 0
478	#endif	1025	#endif
479		1026
480	static void	1027	static void
481	childcb (struct ev_signal *sw, int revents)	1028	childcb (EV_P_ ev_signal *sw, int revents)
482	{	1029	{
483	struct ev_child *w;
484	int pid, status;	1030	int pid, status;
485		1031
		1032	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
486	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	1033	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
487	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	1034	if (!WCONTINUED
488	if (w->pid == pid || !w->pid)	1035	|| errno != EINVAL
489	{	1036	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
490	w->rpid = pid;	1037	return;
491	w->rstatus = status;	1038
492	event ((W)w, EV_CHILD);	1039	/* make sure we are called again until all children have been reaped */
493	}	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 */
494	}	1046	}
495		1047
496	#endif	1048	#endif
497		1049
498	/*****************************************************************************/	1050	/*****************************************************************************/
499		1051
		1052	#if EV_USE_PORT
		1053	# include "ev_port.c"
		1054	#endif
500	#if EV_USE_KQUEUE	1055	#if EV_USE_KQUEUE
501	# include "ev_kqueue.c"	1056	# include "ev_kqueue.c"
502	#endif	1057	#endif
503	#if EV_USE_EPOLL	1058	#if EV_USE_EPOLL
504	# include "ev_epoll.c"	1059	# include "ev_epoll.c"
…		…
520	ev_version_minor (void)	1075	ev_version_minor (void)
521	{	1076	{
522	return EV_VERSION_MINOR;	1077	return EV_VERSION_MINOR;
523	}	1078	}
524		1079
525	/* 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 */
526	static int	1081	int inline_size
527	enable_secure ()	1082	enable_secure (void)
528	{	1083	{
		1084	#ifdef _WIN32
		1085	return 0;
		1086	#else
529	return getuid () != geteuid ()	1087	return getuid () != geteuid ()
530	|| getgid () != getegid ();	1088	|| getgid () != getegid ();
		1089	#endif
531	}	1090	}
532		1091
533	int ev_init (int methods)	1092	unsigned int
		1093	ev_supported_backends (void)
534	{	1094	{
535	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)
536	{	1164	{
537	#if EV_USE_MONOTONIC	1165	#if EV_USE_MONOTONIC
538	{	1166	{
539	struct timespec ts;	1167	struct timespec ts;
540	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1168	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
541	have_monotonic = 1;	1169	have_monotonic = 1;
542	}	1170	}
543	#endif	1171	#endif
544		1172
545	ev_now = ev_time ();	1173	ev_rt_now = ev_time ();
546	now = get_clock ();	1174	mn_now = get_clock ();
547	now_floor = now;	1175	now_floor = mn_now;
548	diff = ev_now - now;	1176	rtmn_diff = ev_rt_now - mn_now;
549		1177
550	if (pipe (sigpipe))	1178	io_blocktime = 0.;
551	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
552		1186
553	if (methods == EVMETHOD_AUTO)	1187	/* pid check not overridable via env */
554	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"))
555	methods = atoi (getenv ("LIBEV_METHODS"));	1196	flags = atoi (getenv ("LIBEV_FLAGS"));
556	else
557	methods = EVMETHOD_ANY;
558		1197
559	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
560	#if EV_USE_KQUEUE	1204	#if EV_USE_KQUEUE
561	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	1205	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
562	#endif	1206	#endif
563	#if EV_USE_EPOLL	1207	#if EV_USE_EPOLL
564	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	1208	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
565	#endif	1209	#endif
566	#if EV_USE_POLL	1210	#if EV_USE_POLL
567	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	1211	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
568	#endif	1212	#endif
569	#if EV_USE_SELECT	1213	#if EV_USE_SELECT
570	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	1214	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
571	#endif	1215	#endif
572		1216
573	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)
574	{	1238	{
575	ev_watcher_init (&sigev, sigcb);	1239	close (evpipe [0]);
576	siginit ();	1240	close (evpipe [1]);
		1241	}
		1242	}
577		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	#endif
		1376
		1377	#if EV_MULTIPLICITY
		1378	struct ev_loop *
		1379	ev_default_loop_init (unsigned int flags)
		1380	#else
		1381	int
		1382	ev_default_loop (unsigned int flags)
		1383	#endif
		1384	{
		1385	if (!ev_default_loop_ptr)
		1386	{
		1387	#if EV_MULTIPLICITY
		1388	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1389	#else
		1390	ev_default_loop_ptr = 1;
		1391	#endif
		1392
		1393	loop_init (EV_A_ flags);
		1394
		1395	if (ev_backend (EV_A))
		1396	{
578	#ifndef WIN32	1397	#ifndef _WIN32
579	ev_signal_init (&childev, childcb, SIGCHLD);	1398	ev_signal_init (&childev, childcb, SIGCHLD);
		1399	ev_set_priority (&childev, EV_MAXPRI);
580	ev_signal_start (&childev);	1400	ev_signal_start (EV_A_ &childev);
		1401	ev_unref (EV_A); /* child watcher should not keep loop alive */
581	#endif	1402	#endif
582	}	1403	}
		1404	else
		1405	ev_default_loop_ptr = 0;
583	}	1406	}
584		1407
585	return ev_method;	1408	return ev_default_loop_ptr;
		1409	}
		1410
		1411	void
		1412	ev_default_destroy (void)
		1413	{
		1414	#if EV_MULTIPLICITY
		1415	struct ev_loop *loop = ev_default_loop_ptr;
		1416	#endif
		1417
		1418	#ifndef _WIN32
		1419	ev_ref (EV_A); /* child watcher */
		1420	ev_signal_stop (EV_A_ &childev);
		1421	#endif
		1422
		1423	loop_destroy (EV_A);
		1424	}
		1425
		1426	void
		1427	ev_default_fork (void)
		1428	{
		1429	#if EV_MULTIPLICITY
		1430	struct ev_loop *loop = ev_default_loop_ptr;
		1431	#endif
		1432
		1433	if (backend)
		1434	postfork = 1; /* must be in line with ev_loop_fork */
586	}	1435	}
587		1436
588	/*****************************************************************************/	1437	/*****************************************************************************/
589		1438
590	void	1439	void
591	ev_fork_prepare (void)	1440	ev_invoke (EV_P_ void *w, int revents)
592	{	1441	{
593	/* nop */	1442	EV_CB_INVOKE ((W)w, revents);
594	}	1443	}
595		1444
596	void	1445	void inline_speed
597	ev_fork_parent (void)
598	{
599	/* nop */
600	}
601
602	void
603	ev_fork_child (void)
604	{
605	#if EV_USE_EPOLL
606	if (ev_method == EVMETHOD_EPOLL)
607	epoll_postfork_child ();
608	#endif
609
610	ev_io_stop (&sigev);
611	close (sigpipe [0]);
612	close (sigpipe [1]);
613	pipe (sigpipe);
614	siginit ();
615	}
616
617	/*****************************************************************************/
618
619	static void
620	call_pending (void)	1446	call_pending (EV_P)
621	{	1447	{
622	int pri;	1448	int pri;
623		1449
624	for (pri = NUMPRI; pri--; )	1450	for (pri = NUMPRI; pri--; )
625	while (pendingcnt [pri])	1451	while (pendingcnt [pri])
626	{	1452	{
627	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1453	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
628		1454
629	if (p->w)	1455	if (expect_true (p->w))
630	{	1456	{
		1457	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1458
631	p->w->pending = 0;	1459	p->w->pending = 0;
632	p->w->cb (p->w, p->events);	1460	EV_CB_INVOKE (p->w, p->events);
633	}	1461	}
634	}	1462	}
635	}	1463	}
636		1464
637	static void	1465	#if EV_IDLE_ENABLE
		1466	void inline_size
		1467	idle_reify (EV_P)
		1468	{
		1469	if (expect_false (idleall))
		1470	{
		1471	int pri;
		1472
		1473	for (pri = NUMPRI; pri--; )
		1474	{
		1475	if (pendingcnt [pri])
		1476	break;
		1477
		1478	if (idlecnt [pri])
		1479	{
		1480	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1481	break;
		1482	}
		1483	}
		1484	}
		1485	}
		1486	#endif
		1487
		1488	void inline_size
638	timers_reify (void)	1489	timers_reify (EV_P)
639	{	1490	{
640	while (timercnt && timers [0]->at <= now)	1491	while (timercnt && ev_at (timers [1]) <= mn_now)
641	{	1492	{
642	struct ev_timer *w = timers [0];	1493	ev_timer *w = (ev_timer *)timers [1];
		1494
		1495	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
643		1496
644	/* first reschedule or stop timer */	1497	/* first reschedule or stop timer */
645	if (w->repeat)	1498	if (w->repeat)
646	{	1499	{
647	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1500	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
648	w->at = now + w->repeat;	1501
		1502	ev_at (w) += w->repeat;
		1503	if (ev_at (w) < mn_now)
		1504	ev_at (w) = mn_now;
		1505
649	downheap ((WT *)timers, timercnt, 0);	1506	downheap (timers, timercnt, 1);
650	}	1507	}
651	else	1508	else
652	ev_timer_stop (w); /* nonrepeating: stop timer */	1509	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
653		1510
654	event ((W)w, EV_TIMEOUT);	1511	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
655	}	1512	}
656	}	1513	}
657		1514
658	static void	1515	#if EV_PERIODIC_ENABLE
		1516	void inline_size
659	periodics_reify (void)	1517	periodics_reify (EV_P)
660	{	1518	{
661	while (periodiccnt && periodics [0]->at <= ev_now)	1519	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
662	{	1520	{
663	struct ev_periodic *w = periodics [0];	1521	ev_periodic *w = (ev_periodic *)periodics [1];
		1522
		1523	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
664		1524
665	/* first reschedule or stop timer */	1525	/* first reschedule or stop timer */
666	if (w->interval)	1526	if (w->reschedule_cb)
667	{	1527	{
		1528	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1529	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1530	downheap (periodics, periodiccnt, 1);
		1531	}
		1532	else if (w->interval)
		1533	{
668	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1534	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1535	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
669	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1536	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
670	downheap ((WT *)periodics, periodiccnt, 0);	1537	downheap (periodics, periodiccnt, 1);
671	}	1538	}
672	else	1539	else
673	ev_periodic_stop (w); /* nonrepeating: stop timer */	1540	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
674		1541
675	event ((W)w, EV_PERIODIC);	1542	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
676	}	1543	}
677	}	1544	}
678		1545
679	static void	1546	static void noinline
680	periodics_reschedule (ev_tstamp diff)	1547	periodics_reschedule (EV_P)
681	{	1548	{
682	int i;	1549	int i;
683		1550
684	/* adjust periodics after time jump */	1551	/* adjust periodics after time jump */
685	for (i = 0; i < periodiccnt; ++i)	1552	for (i = 1; i <= periodiccnt; ++i)
686	{	1553	{
687	struct ev_periodic *w = periodics [i];	1554	ev_periodic *w = (ev_periodic *)periodics [i];
688		1555
		1556	if (w->reschedule_cb)
		1557	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
689	if (w->interval)	1558	else if (w->interval)
690	{
691	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1559	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
692
693	if (fabs (diff) >= 1e-4)
694	{
695	ev_periodic_stop (w);
696	ev_periodic_start (w);
697
698	i = 0; /* restart loop, inefficient, but time jumps should be rare */
699	}
700	}
701	}
702	}
703
704	static int
705	time_update_monotonic (void)
706	{
707	now = get_clock ();
708
709	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
710	{	1560	}
711	ev_now = now + diff;
712	return 0;
713	}
714	else
715	{
716	now_floor = now;
717	ev_now = ev_time ();
718	return 1;
719	}
720	}
721		1561
722	static void	1562	/* now rebuild the heap */
723	time_update (void)	1563	for (i = periodiccnt >> 1; i--; )
		1564	downheap (periodics, periodiccnt, i);
		1565	}
		1566	#endif
		1567
		1568	void inline_speed
		1569	time_update (EV_P_ ev_tstamp max_block)
724	{	1570	{
725	int i;	1571	int i;
726		1572
727	#if EV_USE_MONOTONIC	1573	#if EV_USE_MONOTONIC
728	if (expect_true (have_monotonic))	1574	if (expect_true (have_monotonic))
729	{	1575	{
730	if (time_update_monotonic ())	1576	ev_tstamp odiff = rtmn_diff;
		1577
		1578	mn_now = get_clock ();
		1579
		1580	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1581	/* interpolate in the meantime */
		1582	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
731	{	1583	{
732	ev_tstamp odiff = diff;	1584	ev_rt_now = rtmn_diff + mn_now;
733		1585	return;
734	for (i = 4; --i; ) /* loop a few times, before making important decisions */
735	{
736	diff = ev_now - now;
737
738	if (fabs (odiff - diff) < MIN_TIMEJUMP)
739	return; /* all is well */
740
741	ev_now = ev_time ();
742	now = get_clock ();
743	now_floor = now;
744	}
745
746	periodics_reschedule (diff - odiff);
747	/* no timer adjustment, as the monotonic clock doesn't jump */
748	}	1586	}
		1587
		1588	now_floor = mn_now;
		1589	ev_rt_now = ev_time ();
		1590
		1591	/* loop a few times, before making important decisions.
		1592	* on the choice of "4": one iteration isn't enough,
		1593	* in case we get preempted during the calls to
		1594	* ev_time and get_clock. a second call is almost guaranteed
		1595	* to succeed in that case, though. and looping a few more times
		1596	* doesn't hurt either as we only do this on time-jumps or
		1597	* in the unlikely event of having been preempted here.
		1598	*/
		1599	for (i = 4; --i; )
		1600	{
		1601	rtmn_diff = ev_rt_now - mn_now;
		1602
		1603	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1604	return; /* all is well */
		1605
		1606	ev_rt_now = ev_time ();
		1607	mn_now = get_clock ();
		1608	now_floor = mn_now;
		1609	}
		1610
		1611	# if EV_PERIODIC_ENABLE
		1612	periodics_reschedule (EV_A);
		1613	# endif
		1614	/* no timer adjustment, as the monotonic clock doesn't jump */
		1615	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
749	}	1616	}
750	else	1617	else
751	#endif	1618	#endif
752	{	1619	{
753	ev_now = ev_time ();	1620	ev_rt_now = ev_time ();
754		1621
755	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1622	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
756	{	1623	{
		1624	#if EV_PERIODIC_ENABLE
757	periodics_reschedule (ev_now - now);	1625	periodics_reschedule (EV_A);
758		1626	#endif
759	/* adjust timers. this is easy, as the offset is the same for all */	1627	/* adjust timers. this is easy, as the offset is the same for all of them */
760	for (i = 0; i < timercnt; ++i)	1628	for (i = 1; i <= timercnt; ++i)
761	timers [i]->at += diff;	1629	ev_at (timers [i]) += ev_rt_now - mn_now;
762	}	1630	}
763		1631
764	now = ev_now;	1632	mn_now = ev_rt_now;
765	}	1633	}
766	}	1634	}
767		1635
768	int ev_loop_done;	1636	void
		1637	ev_ref (EV_P)
		1638	{
		1639	++activecnt;
		1640	}
769		1641
		1642	void
		1643	ev_unref (EV_P)
		1644	{
		1645	--activecnt;
		1646	}
		1647
		1648	static int loop_done;
		1649
		1650	void
770	void ev_loop (int flags)	1651	ev_loop (EV_P_ int flags)
771	{	1652	{
772	double block;	1653	loop_done = EVUNLOOP_CANCEL;
773	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1654
		1655	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
774		1656
775	do	1657	do
776	{	1658	{
		1659	#ifndef _WIN32
		1660	if (expect_false (curpid)) /* penalise the forking check even more */
		1661	if (expect_false (getpid () != curpid))
		1662	{
		1663	curpid = getpid ();
		1664	postfork = 1;
		1665	}
		1666	#endif
		1667
		1668	#if EV_FORK_ENABLE
		1669	/* we might have forked, so queue fork handlers */
		1670	if (expect_false (postfork))
		1671	if (forkcnt)
		1672	{
		1673	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1674	call_pending (EV_A);
		1675	}
		1676	#endif
		1677
777	/* queue check watchers (and execute them) */	1678	/* queue prepare watchers (and execute them) */
778	if (expect_false (preparecnt))	1679	if (expect_false (preparecnt))
779	{	1680	{
780	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1681	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
781	call_pending ();	1682	call_pending (EV_A);
782	}	1683	}
783		1684
		1685	if (expect_false (!activecnt))
		1686	break;
		1687
		1688	/* we might have forked, so reify kernel state if necessary */
		1689	if (expect_false (postfork))
		1690	loop_fork (EV_A);
		1691
784	/* update fd-related kernel structures */	1692	/* update fd-related kernel structures */
785	fd_reify ();	1693	fd_reify (EV_A);
786		1694
787	/* calculate blocking time */	1695	/* calculate blocking time */
		1696	{
		1697	ev_tstamp waittime = 0.;
		1698	ev_tstamp sleeptime = 0.;
788		1699
789	/* we only need this for !monotonic clockor timers, but as we basically	1700	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
790	always have timers, we just calculate it always */
791	#if EV_USE_MONOTONIC
792	if (expect_true (have_monotonic))
793	time_update_monotonic ();
794	else
795	#endif
796	{	1701	{
797	ev_now = ev_time ();	1702	/* update time to cancel out callback processing overhead */
798	now = ev_now;	1703	time_update (EV_A_ 1e100);
799	}
800		1704
801	if (flags & EVLOOP_NONBLOCK || idlecnt)
802	block = 0.;
803	else
804	{
805	block = MAX_BLOCKTIME;	1705	waittime = MAX_BLOCKTIME;
806		1706
807	if (timercnt)	1707	if (timercnt)
808	{	1708	{
809	ev_tstamp to = timers [0]->at - now + method_fudge;	1709	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
810	if (block > to) block = to;	1710	if (waittime > to) waittime = to;
811	}	1711	}
812		1712
		1713	#if EV_PERIODIC_ENABLE
813	if (periodiccnt)	1714	if (periodiccnt)
814	{	1715	{
815	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1716	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
816	if (block > to) block = to;	1717	if (waittime > to) waittime = to;
817	}	1718	}
		1719	#endif
818		1720
819	if (block < 0.) block = 0.;	1721	if (expect_false (waittime < timeout_blocktime))
		1722	waittime = timeout_blocktime;
		1723
		1724	sleeptime = waittime - backend_fudge;
		1725
		1726	if (expect_true (sleeptime > io_blocktime))
		1727	sleeptime = io_blocktime;
		1728
		1729	if (sleeptime)
		1730	{
		1731	ev_sleep (sleeptime);
		1732	waittime -= sleeptime;
		1733	}
820	}	1734	}
821		1735
822	method_poll (block);	1736	++loop_count;
		1737	backend_poll (EV_A_ waittime);
823		1738
824	/* update ev_now, do magic */	1739	/* update ev_rt_now, do magic */
825	time_update ();	1740	time_update (EV_A_ waittime + sleeptime);
		1741	}
826		1742
827	/* queue pending timers and reschedule them */	1743	/* queue pending timers and reschedule them */
828	timers_reify (); /* relative timers called last */	1744	timers_reify (EV_A); /* relative timers called last */
		1745	#if EV_PERIODIC_ENABLE
829	periodics_reify (); /* absolute timers called first */	1746	periodics_reify (EV_A); /* absolute timers called first */
		1747	#endif
830		1748
		1749	#if EV_IDLE_ENABLE
831	/* queue idle watchers unless io or timers are pending */	1750	/* queue idle watchers unless other events are pending */
832	if (!pendingcnt)	1751	idle_reify (EV_A);
833	queue_events ((W *)idles, idlecnt, EV_IDLE);	1752	#endif
834		1753
835	/* queue check watchers, to be executed first */	1754	/* queue check watchers, to be executed first */
836	if (checkcnt)	1755	if (expect_false (checkcnt))
837	queue_events ((W *)checks, checkcnt, EV_CHECK);	1756	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
838		1757
839	call_pending ();	1758	call_pending (EV_A);
840	}	1759	}
841	while (!ev_loop_done);	1760	while (expect_true (
		1761	activecnt
		1762	&& !loop_done
		1763	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1764	));
842		1765
843	if (ev_loop_done != 2)	1766	if (loop_done == EVUNLOOP_ONE)
		1767	loop_done = EVUNLOOP_CANCEL;
		1768	}
		1769
		1770	void
		1771	ev_unloop (EV_P_ int how)
		1772	{
844	ev_loop_done = 0;	1773	loop_done = how;
845	}	1774	}
846		1775
847	/*****************************************************************************/	1776	/*****************************************************************************/
848		1777
849	static void	1778	void inline_size
850	wlist_add (WL *head, WL elem)	1779	wlist_add (WL *head, WL elem)
851	{	1780	{
852	elem->next = *head;	1781	elem->next = *head;
853	*head = elem;	1782	*head = elem;
854	}	1783	}
855		1784
856	static void	1785	void inline_size
857	wlist_del (WL *head, WL elem)	1786	wlist_del (WL *head, WL elem)
858	{	1787	{
859	while (*head)	1788	while (*head)
860	{	1789	{
861	if (*head == elem)	1790	if (*head == elem)
…		…
866		1795
867	head = &(*head)->next;	1796	head = &(*head)->next;
868	}	1797	}
869	}	1798	}
870		1799
871	static void	1800	void inline_speed
872	ev_clear_pending (W w)	1801	clear_pending (EV_P_ W w)
873	{	1802	{
874	if (w->pending)	1803	if (w->pending)
875	{	1804	{
876	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1805	pendings [ABSPRI (w)][w->pending - 1].w = 0;
877	w->pending = 0;	1806	w->pending = 0;
878	}	1807	}
879	}	1808	}
880		1809
881	static void	1810	int
		1811	ev_clear_pending (EV_P_ void *w)
		1812	{
		1813	W w_ = (W)w;
		1814	int pending = w_->pending;
		1815
		1816	if (expect_true (pending))
		1817	{
		1818	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1819	w_->pending = 0;
		1820	p->w = 0;
		1821	return p->events;
		1822	}
		1823	else
		1824	return 0;
		1825	}
		1826
		1827	void inline_size
		1828	pri_adjust (EV_P_ W w)
		1829	{
		1830	int pri = w->priority;
		1831	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1832	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1833	w->priority = pri;
		1834	}
		1835
		1836	void inline_speed
882	ev_start (W w, int active)	1837	ev_start (EV_P_ W w, int active)
883	{	1838	{
884	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1839	pri_adjust (EV_A_ w);
885	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
886
887	w->active = active;	1840	w->active = active;
		1841	ev_ref (EV_A);
888	}	1842	}
889		1843
890	static void	1844	void inline_size
891	ev_stop (W w)	1845	ev_stop (EV_P_ W w)
892	{	1846	{
		1847	ev_unref (EV_A);
893	w->active = 0;	1848	w->active = 0;
894	}	1849	}
895		1850
896	/*****************************************************************************/	1851	/*****************************************************************************/
897		1852
898	void	1853	void noinline
899	ev_io_start (struct ev_io *w)	1854	ev_io_start (EV_P_ ev_io *w)
900	{	1855	{
901	int fd = w->fd;	1856	int fd = w->fd;
902		1857
903	if (ev_is_active (w))	1858	if (expect_false (ev_is_active (w)))
904	return;	1859	return;
905		1860
906	assert (("ev_io_start called with negative fd", fd >= 0));	1861	assert (("ev_io_start called with negative fd", fd >= 0));
907		1862
908	ev_start ((W)w, 1);	1863	ev_start (EV_A_ (W)w, 1);
909	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1864	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
910	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1865	wlist_add (&anfds[fd].head, (WL)w);
911		1866
912	fd_change (fd);	1867	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1868	w->events &= ~EV_IOFDSET;
913	}	1869	}
914		1870
915	void	1871	void noinline
916	ev_io_stop (struct ev_io *w)	1872	ev_io_stop (EV_P_ ev_io *w)
917	{	1873	{
918	ev_clear_pending ((W)w);	1874	clear_pending (EV_A_ (W)w);
919	if (!ev_is_active (w))	1875	if (expect_false (!ev_is_active (w)))
920	return;	1876	return;
921		1877
		1878	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1879
922	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1880	wlist_del (&anfds[w->fd].head, (WL)w);
923	ev_stop ((W)w);	1881	ev_stop (EV_A_ (W)w);
924		1882
925	fd_change (w->fd);	1883	fd_change (EV_A_ w->fd, 1);
926	}	1884	}
927		1885
928	void	1886	void noinline
929	ev_timer_start (struct ev_timer *w)	1887	ev_timer_start (EV_P_ ev_timer *w)
930	{	1888	{
931	if (ev_is_active (w))	1889	if (expect_false (ev_is_active (w)))
932	return;	1890	return;
933		1891
934	w->at += now;	1892	ev_at (w) += mn_now;
935		1893
936	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1894	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
937		1895
938	ev_start ((W)w, ++timercnt);	1896	ev_start (EV_A_ (W)w, ++timercnt);
939	array_needsize (timers, timermax, timercnt, );	1897	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
940	timers [timercnt - 1] = w;	1898	timers [timercnt] = (WT)w;
941	upheap ((WT *)timers, timercnt - 1);	1899	upheap (timers, timercnt);
942	}
943		1900
944	void	1901	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		1902	}
		1903
		1904	void noinline
945	ev_timer_stop (struct ev_timer *w)	1905	ev_timer_stop (EV_P_ ev_timer *w)
946	{	1906	{
947	ev_clear_pending ((W)w);	1907	clear_pending (EV_A_ (W)w);
948	if (!ev_is_active (w))	1908	if (expect_false (!ev_is_active (w)))
949	return;	1909	return;
950		1910
951	if (w->active < timercnt--)	1911	{
		1912	int active = ev_active (w);
		1913
		1914	assert (("internal timer heap corruption", timers [active] == (WT)w));
		1915
		1916	if (expect_true (active < timercnt))
952	{	1917	{
953	timers [w->active - 1] = timers [timercnt];	1918	timers [active] = timers [timercnt];
954	downheap ((WT *)timers, timercnt, w->active - 1);	1919	adjustheap (timers, timercnt, active);
955	}	1920	}
956		1921
957	w->at = w->repeat;	1922	--timercnt;
		1923	}
958		1924
		1925	ev_at (w) -= mn_now;
		1926
959	ev_stop ((W)w);	1927	ev_stop (EV_A_ (W)w);
960	}	1928	}
961		1929
962	void	1930	void noinline
963	ev_timer_again (struct ev_timer *w)	1931	ev_timer_again (EV_P_ ev_timer *w)
964	{	1932	{
965	if (ev_is_active (w))	1933	if (ev_is_active (w))
966	{	1934	{
967	if (w->repeat)	1935	if (w->repeat)
968	{	1936	{
969	w->at = now + w->repeat;	1937	ev_at (w) = mn_now + w->repeat;
970	downheap ((WT *)timers, timercnt, w->active - 1);	1938	adjustheap (timers, timercnt, ev_active (w));
971	}	1939	}
972	else	1940	else
973	ev_timer_stop (w);	1941	ev_timer_stop (EV_A_ w);
974	}	1942	}
975	else if (w->repeat)	1943	else if (w->repeat)
		1944	{
		1945	ev_at (w) = w->repeat;
976	ev_timer_start (w);	1946	ev_timer_start (EV_A_ w);
		1947	}
977	}	1948	}
978		1949
979	void	1950	#if EV_PERIODIC_ENABLE
		1951	void noinline
980	ev_periodic_start (struct ev_periodic *w)	1952	ev_periodic_start (EV_P_ ev_periodic *w)
981	{	1953	{
982	if (ev_is_active (w))	1954	if (expect_false (ev_is_active (w)))
983	return;	1955	return;
984		1956
		1957	if (w->reschedule_cb)
		1958	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1959	else if (w->interval)
		1960	{
985	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1961	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
986
987	/* this formula differs from the one in periodic_reify because we do not always round up */	1962	/* this formula differs from the one in periodic_reify because we do not always round up */
988	if (w->interval)
989	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1963	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1964	}
		1965	else
		1966	ev_at (w) = w->offset;
990		1967
991	ev_start ((W)w, ++periodiccnt);	1968	ev_start (EV_A_ (W)w, ++periodiccnt);
992	array_needsize (periodics, periodicmax, periodiccnt, );	1969	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
993	periodics [periodiccnt - 1] = w;	1970	periodics [periodiccnt] = (WT)w;
994	upheap ((WT *)periodics, periodiccnt - 1);	1971	upheap (periodics, periodiccnt);
995	}
996		1972
997	void	1973	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
		1974	}
		1975
		1976	void noinline
998	ev_periodic_stop (struct ev_periodic *w)	1977	ev_periodic_stop (EV_P_ ev_periodic *w)
999	{	1978	{
1000	ev_clear_pending ((W)w);	1979	clear_pending (EV_A_ (W)w);
1001	if (!ev_is_active (w))	1980	if (expect_false (!ev_is_active (w)))
1002	return;	1981	return;
1003		1982
1004	if (w->active < periodiccnt--)	1983	{
		1984	int active = ev_active (w);
		1985
		1986	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		1987
		1988	if (expect_true (active < periodiccnt))
1005	{	1989	{
1006	periodics [w->active - 1] = periodics [periodiccnt];	1990	periodics [active] = periodics [periodiccnt];
1007	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1991	adjustheap (periodics, periodiccnt, active);
1008	}	1992	}
1009		1993
		1994	--periodiccnt;
		1995	}
		1996
1010	ev_stop ((W)w);	1997	ev_stop (EV_A_ (W)w);
1011	}	1998	}
1012		1999
1013	void	2000	void noinline
		2001	ev_periodic_again (EV_P_ ev_periodic *w)
		2002	{
		2003	/* TODO: use adjustheap and recalculation */
		2004	ev_periodic_stop (EV_A_ w);
		2005	ev_periodic_start (EV_A_ w);
		2006	}
		2007	#endif
		2008
		2009	#ifndef SA_RESTART
		2010	# define SA_RESTART 0
		2011	#endif
		2012
		2013	void noinline
1014	ev_signal_start (struct ev_signal *w)	2014	ev_signal_start (EV_P_ ev_signal *w)
1015	{	2015	{
		2016	#if EV_MULTIPLICITY
		2017	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2018	#endif
1016	if (ev_is_active (w))	2019	if (expect_false (ev_is_active (w)))
1017	return;	2020	return;
1018		2021
1019	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2022	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1020		2023
1021	ev_start ((W)w, 1);	2024	evpipe_init (EV_A);
		2025
		2026	{
		2027	#ifndef _WIN32
		2028	sigset_t full, prev;
		2029	sigfillset (&full);
		2030	sigprocmask (SIG_SETMASK, &full, &prev);
		2031	#endif
		2032
1022	array_needsize (signals, signalmax, w->signum, signals_init);	2033	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2034
		2035	#ifndef _WIN32
		2036	sigprocmask (SIG_SETMASK, &prev, 0);
		2037	#endif
		2038	}
		2039
		2040	ev_start (EV_A_ (W)w, 1);
1023	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2041	wlist_add (&signals [w->signum - 1].head, (WL)w);
1024		2042
1025	if (!w->next)	2043	if (!((WL)w)->next)
1026	{	2044	{
		2045	#if _WIN32
		2046	signal (w->signum, ev_sighandler);
		2047	#else
1027	struct sigaction sa;	2048	struct sigaction sa;
1028	sa.sa_handler = sighandler;	2049	sa.sa_handler = ev_sighandler;
1029	sigfillset (&sa.sa_mask);	2050	sigfillset (&sa.sa_mask);
1030	sa.sa_flags = 0;	2051	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1031	sigaction (w->signum, &sa, 0);	2052	sigaction (w->signum, &sa, 0);
		2053	#endif
1032	}	2054	}
1033	}	2055	}
1034		2056
1035	void	2057	void noinline
1036	ev_signal_stop (struct ev_signal *w)	2058	ev_signal_stop (EV_P_ ev_signal *w)
1037	{	2059	{
1038	ev_clear_pending ((W)w);	2060	clear_pending (EV_A_ (W)w);
1039	if (!ev_is_active (w))	2061	if (expect_false (!ev_is_active (w)))
1040	return;	2062	return;
1041		2063
1042	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2064	wlist_del (&signals [w->signum - 1].head, (WL)w);
1043	ev_stop ((W)w);	2065	ev_stop (EV_A_ (W)w);
1044		2066
1045	if (!signals [w->signum - 1].head)	2067	if (!signals [w->signum - 1].head)
1046	signal (w->signum, SIG_DFL);	2068	signal (w->signum, SIG_DFL);
1047	}	2069	}
1048		2070
1049	void	2071	void
1050	ev_idle_start (struct ev_idle *w)	2072	ev_child_start (EV_P_ ev_child *w)
1051	{	2073	{
		2074	#if EV_MULTIPLICITY
		2075	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2076	#endif
1052	if (ev_is_active (w))	2077	if (expect_false (ev_is_active (w)))
1053	return;	2078	return;
1054		2079
1055	ev_start ((W)w, ++idlecnt);	2080	ev_start (EV_A_ (W)w, 1);
1056	array_needsize (idles, idlemax, idlecnt, );	2081	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1057	idles [idlecnt - 1] = w;
1058	}	2082	}
1059		2083
1060	void	2084	void
1061	ev_idle_stop (struct ev_idle *w)	2085	ev_child_stop (EV_P_ ev_child *w)
1062	{	2086	{
1063	ev_clear_pending ((W)w);	2087	clear_pending (EV_A_ (W)w);
1064	if (ev_is_active (w))	2088	if (expect_false (!ev_is_active (w)))
1065	return;	2089	return;
1066		2090
1067	idles [w->active - 1] = idles [--idlecnt];	2091	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1068	ev_stop ((W)w);	2092	ev_stop (EV_A_ (W)w);
1069	}	2093	}
1070		2094
		2095	#if EV_STAT_ENABLE
		2096
		2097	# ifdef _WIN32
		2098	# undef lstat
		2099	# define lstat(a,b) _stati64 (a,b)
		2100	# endif
		2101
		2102	#define DEF_STAT_INTERVAL 5.0074891
		2103	#define MIN_STAT_INTERVAL 0.1074891
		2104
		2105	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2106
		2107	#if EV_USE_INOTIFY
		2108	# define EV_INOTIFY_BUFSIZE 8192
		2109
		2110	static void noinline
		2111	infy_add (EV_P_ ev_stat *w)
		2112	{
		2113	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		2114
		2115	if (w->wd < 0)
		2116	{
		2117	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2118
		2119	/* monitor some parent directory for speedup hints */
		2120	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2121	/* but an efficiency issue only */
		2122	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2123	{
		2124	char path [4096];
		2125	strcpy (path, w->path);
		2126
		2127	do
		2128	{
		2129	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2130	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2131
		2132	char *pend = strrchr (path, '/');
		2133
		2134	if (!pend)
		2135	break; /* whoops, no '/', complain to your admin */
		2136
		2137	*pend = 0;
		2138	w->wd = inotify_add_watch (fs_fd, path, mask);
		2139	}
		2140	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2141	}
		2142	}
		2143	else
		2144	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2145
		2146	if (w->wd >= 0)
		2147	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2148	}
		2149
		2150	static void noinline
		2151	infy_del (EV_P_ ev_stat *w)
		2152	{
		2153	int slot;
		2154	int wd = w->wd;
		2155
		2156	if (wd < 0)
		2157	return;
		2158
		2159	w->wd = -2;
		2160	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2161	wlist_del (&fs_hash [slot].head, (WL)w);
		2162
		2163	/* remove this watcher, if others are watching it, they will rearm */
		2164	inotify_rm_watch (fs_fd, wd);
		2165	}
		2166
		2167	static void noinline
		2168	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2169	{
		2170	if (slot < 0)
		2171	/* overflow, need to check for all hahs slots */
		2172	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2173	infy_wd (EV_A_ slot, wd, ev);
		2174	else
		2175	{
		2176	WL w_;
		2177
		2178	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2179	{
		2180	ev_stat *w = (ev_stat *)w_;
		2181	w_ = w_->next; /* lets us remove this watcher and all before it */
		2182
		2183	if (w->wd == wd || wd == -1)
		2184	{
		2185	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2186	{
		2187	w->wd = -1;
		2188	infy_add (EV_A_ w); /* re-add, no matter what */
		2189	}
		2190
		2191	stat_timer_cb (EV_A_ &w->timer, 0);
		2192	}
		2193	}
		2194	}
		2195	}
		2196
		2197	static void
		2198	infy_cb (EV_P_ ev_io *w, int revents)
		2199	{
		2200	char buf [EV_INOTIFY_BUFSIZE];
		2201	struct inotify_event *ev = (struct inotify_event *)buf;
		2202	int ofs;
		2203	int len = read (fs_fd, buf, sizeof (buf));
		2204
		2205	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2206	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2207	}
		2208
		2209	void inline_size
		2210	infy_init (EV_P)
		2211	{
		2212	if (fs_fd != -2)
		2213	return;
		2214
		2215	fs_fd = inotify_init ();
		2216
		2217	if (fs_fd >= 0)
		2218	{
		2219	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2220	ev_set_priority (&fs_w, EV_MAXPRI);
		2221	ev_io_start (EV_A_ &fs_w);
		2222	}
		2223	}
		2224
		2225	void inline_size
		2226	infy_fork (EV_P)
		2227	{
		2228	int slot;
		2229
		2230	if (fs_fd < 0)
		2231	return;
		2232
		2233	close (fs_fd);
		2234	fs_fd = inotify_init ();
		2235
		2236	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2237	{
		2238	WL w_ = fs_hash [slot].head;
		2239	fs_hash [slot].head = 0;
		2240
		2241	while (w_)
		2242	{
		2243	ev_stat *w = (ev_stat *)w_;
		2244	w_ = w_->next; /* lets us add this watcher */
		2245
		2246	w->wd = -1;
		2247
		2248	if (fs_fd >= 0)
		2249	infy_add (EV_A_ w); /* re-add, no matter what */
		2250	else
		2251	ev_timer_start (EV_A_ &w->timer);
		2252	}
		2253
		2254	}
		2255	}
		2256
		2257	#endif
		2258
1071	void	2259	void
		2260	ev_stat_stat (EV_P_ ev_stat *w)
		2261	{
		2262	if (lstat (w->path, &w->attr) < 0)
		2263	w->attr.st_nlink = 0;
		2264	else if (!w->attr.st_nlink)
		2265	w->attr.st_nlink = 1;
		2266	}
		2267
		2268	static void noinline
		2269	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2270	{
		2271	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2272
		2273	/* we copy this here each the time so that */
		2274	/* prev has the old value when the callback gets invoked */
		2275	w->prev = w->attr;
		2276	ev_stat_stat (EV_A_ w);
		2277
		2278	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2279	if (
		2280	w->prev.st_dev != w->attr.st_dev
		2281	|| w->prev.st_ino != w->attr.st_ino
		2282	|| w->prev.st_mode != w->attr.st_mode
		2283	|| w->prev.st_nlink != w->attr.st_nlink
		2284	|| w->prev.st_uid != w->attr.st_uid
		2285	|| w->prev.st_gid != w->attr.st_gid
		2286	|| w->prev.st_rdev != w->attr.st_rdev
		2287	|| w->prev.st_size != w->attr.st_size
		2288	|| w->prev.st_atime != w->attr.st_atime
		2289	|| w->prev.st_mtime != w->attr.st_mtime
		2290	|| w->prev.st_ctime != w->attr.st_ctime
		2291	) {
		2292	#if EV_USE_INOTIFY
		2293	infy_del (EV_A_ w);
		2294	infy_add (EV_A_ w);
		2295	ev_stat_stat (EV_A_ w); /* avoid race... */
		2296	#endif
		2297
		2298	ev_feed_event (EV_A_ w, EV_STAT);
		2299	}
		2300	}
		2301
		2302	void
		2303	ev_stat_start (EV_P_ ev_stat *w)
		2304	{
		2305	if (expect_false (ev_is_active (w)))
		2306	return;
		2307
		2308	/* since we use memcmp, we need to clear any padding data etc. */
		2309	memset (&w->prev, 0, sizeof (ev_statdata));
		2310	memset (&w->attr, 0, sizeof (ev_statdata));
		2311
		2312	ev_stat_stat (EV_A_ w);
		2313
		2314	if (w->interval < MIN_STAT_INTERVAL)
		2315	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2316
		2317	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2318	ev_set_priority (&w->timer, ev_priority (w));
		2319
		2320	#if EV_USE_INOTIFY
		2321	infy_init (EV_A);
		2322
		2323	if (fs_fd >= 0)
		2324	infy_add (EV_A_ w);
		2325	else
		2326	#endif
		2327	ev_timer_start (EV_A_ &w->timer);
		2328
		2329	ev_start (EV_A_ (W)w, 1);
		2330	}
		2331
		2332	void
		2333	ev_stat_stop (EV_P_ ev_stat *w)
		2334	{
		2335	clear_pending (EV_A_ (W)w);
		2336	if (expect_false (!ev_is_active (w)))
		2337	return;
		2338
		2339	#if EV_USE_INOTIFY
		2340	infy_del (EV_A_ w);
		2341	#endif
		2342	ev_timer_stop (EV_A_ &w->timer);
		2343
		2344	ev_stop (EV_A_ (W)w);
		2345	}
		2346	#endif
		2347
		2348	#if EV_IDLE_ENABLE
		2349	void
		2350	ev_idle_start (EV_P_ ev_idle *w)
		2351	{
		2352	if (expect_false (ev_is_active (w)))
		2353	return;
		2354
		2355	pri_adjust (EV_A_ (W)w);
		2356
		2357	{
		2358	int active = ++idlecnt [ABSPRI (w)];
		2359
		2360	++idleall;
		2361	ev_start (EV_A_ (W)w, active);
		2362
		2363	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2364	idles [ABSPRI (w)][active - 1] = w;
		2365	}
		2366	}
		2367
		2368	void
		2369	ev_idle_stop (EV_P_ ev_idle *w)
		2370	{
		2371	clear_pending (EV_A_ (W)w);
		2372	if (expect_false (!ev_is_active (w)))
		2373	return;
		2374
		2375	{
		2376	int active = ev_active (w);
		2377
		2378	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2379	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2380
		2381	ev_stop (EV_A_ (W)w);
		2382	--idleall;
		2383	}
		2384	}
		2385	#endif
		2386
		2387	void
1072	ev_prepare_start (struct ev_prepare *w)	2388	ev_prepare_start (EV_P_ ev_prepare *w)
1073	{	2389	{
1074	if (ev_is_active (w))	2390	if (expect_false (ev_is_active (w)))
1075	return;	2391	return;
1076		2392
1077	ev_start ((W)w, ++preparecnt);	2393	ev_start (EV_A_ (W)w, ++preparecnt);
1078	array_needsize (prepares, preparemax, preparecnt, );	2394	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1079	prepares [preparecnt - 1] = w;	2395	prepares [preparecnt - 1] = w;
1080	}	2396	}
1081		2397
1082	void	2398	void
1083	ev_prepare_stop (struct ev_prepare *w)	2399	ev_prepare_stop (EV_P_ ev_prepare *w)
1084	{	2400	{
1085	ev_clear_pending ((W)w);	2401	clear_pending (EV_A_ (W)w);
1086	if (ev_is_active (w))	2402	if (expect_false (!ev_is_active (w)))
1087	return;	2403	return;
1088		2404
		2405	{
		2406	int active = ev_active (w);
		2407
1089	prepares [w->active - 1] = prepares [--preparecnt];	2408	prepares [active - 1] = prepares [--preparecnt];
		2409	ev_active (prepares [active - 1]) = active;
		2410	}
		2411
1090	ev_stop ((W)w);	2412	ev_stop (EV_A_ (W)w);
1091	}	2413	}
1092		2414
1093	void	2415	void
1094	ev_check_start (struct ev_check *w)	2416	ev_check_start (EV_P_ ev_check *w)
1095	{	2417	{
1096	if (ev_is_active (w))	2418	if (expect_false (ev_is_active (w)))
1097	return;	2419	return;
1098		2420
1099	ev_start ((W)w, ++checkcnt);	2421	ev_start (EV_A_ (W)w, ++checkcnt);
1100	array_needsize (checks, checkmax, checkcnt, );	2422	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1101	checks [checkcnt - 1] = w;	2423	checks [checkcnt - 1] = w;
1102	}	2424	}
1103		2425
1104	void	2426	void
1105	ev_check_stop (struct ev_check *w)	2427	ev_check_stop (EV_P_ ev_check *w)
1106	{	2428	{
1107	ev_clear_pending ((W)w);	2429	clear_pending (EV_A_ (W)w);
1108	if (ev_is_active (w))	2430	if (expect_false (!ev_is_active (w)))
1109	return;	2431	return;
1110		2432
		2433	{
		2434	int active = ev_active (w);
		2435
1111	checks [w->active - 1] = checks [--checkcnt];	2436	checks [active - 1] = checks [--checkcnt];
		2437	ev_active (checks [active - 1]) = active;
		2438	}
		2439
1112	ev_stop ((W)w);	2440	ev_stop (EV_A_ (W)w);
1113	}	2441	}
1114		2442
1115	void	2443	#if EV_EMBED_ENABLE
1116	ev_child_start (struct ev_child *w)	2444	void noinline
		2445	ev_embed_sweep (EV_P_ ev_embed *w)
1117	{	2446	{
		2447	ev_loop (w->other, EVLOOP_NONBLOCK);
		2448	}
		2449
		2450	static void
		2451	embed_io_cb (EV_P_ ev_io *io, int revents)
		2452	{
		2453	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2454
1118	if (ev_is_active (w))	2455	if (ev_cb (w))
1119	return;	2456	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2457	else
		2458	ev_loop (w->other, EVLOOP_NONBLOCK);
		2459	}
1120		2460
		2461	static void
		2462	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2463	{
		2464	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2465
		2466	{
		2467	struct ev_loop *loop = w->other;
		2468
		2469	while (fdchangecnt)
		2470	{
		2471	fd_reify (EV_A);
		2472	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2473	}
		2474	}
		2475	}
		2476
		2477	#if 0
		2478	static void
		2479	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2480	{
		2481	ev_idle_stop (EV_A_ idle);
		2482	}
		2483	#endif
		2484
		2485	void
		2486	ev_embed_start (EV_P_ ev_embed *w)
		2487	{
		2488	if (expect_false (ev_is_active (w)))
		2489	return;
		2490
		2491	{
		2492	struct ev_loop *loop = w->other;
		2493	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2494	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2495	}
		2496
		2497	ev_set_priority (&w->io, ev_priority (w));
		2498	ev_io_start (EV_A_ &w->io);
		2499
		2500	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2501	ev_set_priority (&w->prepare, EV_MINPRI);
		2502	ev_prepare_start (EV_A_ &w->prepare);
		2503
		2504	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2505
1121	ev_start ((W)w, 1);	2506	ev_start (EV_A_ (W)w, 1);
1122	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1123	}	2507	}
1124		2508
1125	void	2509	void
1126	ev_child_stop (struct ev_child *w)	2510	ev_embed_stop (EV_P_ ev_embed *w)
1127	{	2511	{
1128	ev_clear_pending ((W)w);	2512	clear_pending (EV_A_ (W)w);
1129	if (ev_is_active (w))	2513	if (expect_false (!ev_is_active (w)))
1130	return;	2514	return;
1131		2515
1132	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2516	ev_io_stop (EV_A_ &w->io);
		2517	ev_prepare_stop (EV_A_ &w->prepare);
		2518
1133	ev_stop ((W)w);	2519	ev_stop (EV_A_ (W)w);
1134	}	2520	}
		2521	#endif
		2522
		2523	#if EV_FORK_ENABLE
		2524	void
		2525	ev_fork_start (EV_P_ ev_fork *w)
		2526	{
		2527	if (expect_false (ev_is_active (w)))
		2528	return;
		2529
		2530	ev_start (EV_A_ (W)w, ++forkcnt);
		2531	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2532	forks [forkcnt - 1] = w;
		2533	}
		2534
		2535	void
		2536	ev_fork_stop (EV_P_ ev_fork *w)
		2537	{
		2538	clear_pending (EV_A_ (W)w);
		2539	if (expect_false (!ev_is_active (w)))
		2540	return;
		2541
		2542	{
		2543	int active = ev_active (w);
		2544
		2545	forks [active - 1] = forks [--forkcnt];
		2546	ev_active (forks [active - 1]) = active;
		2547	}
		2548
		2549	ev_stop (EV_A_ (W)w);
		2550	}
		2551	#endif
		2552
		2553	#if EV_ASYNC_ENABLE
		2554	void
		2555	ev_async_start (EV_P_ ev_async *w)
		2556	{
		2557	if (expect_false (ev_is_active (w)))
		2558	return;
		2559
		2560	evpipe_init (EV_A);
		2561
		2562	ev_start (EV_A_ (W)w, ++asynccnt);
		2563	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2564	asyncs [asynccnt - 1] = w;
		2565	}
		2566
		2567	void
		2568	ev_async_stop (EV_P_ ev_async *w)
		2569	{
		2570	clear_pending (EV_A_ (W)w);
		2571	if (expect_false (!ev_is_active (w)))
		2572	return;
		2573
		2574	{
		2575	int active = ev_active (w);
		2576
		2577	asyncs [active - 1] = asyncs [--asynccnt];
		2578	ev_active (asyncs [active - 1]) = active;
		2579	}
		2580
		2581	ev_stop (EV_A_ (W)w);
		2582	}
		2583
		2584	void
		2585	ev_async_send (EV_P_ ev_async *w)
		2586	{
		2587	w->sent = 1;
		2588	evpipe_write (EV_A_ &gotasync);
		2589	}
		2590	#endif
1135		2591
1136	/*****************************************************************************/	2592	/*****************************************************************************/
1137		2593
1138	struct ev_once	2594	struct ev_once
1139	{	2595	{
1140	struct ev_io io;	2596	ev_io io;
1141	struct ev_timer to;	2597	ev_timer to;
1142	void (*cb)(int revents, void *arg);	2598	void (*cb)(int revents, void *arg);
1143	void *arg;	2599	void *arg;
1144	};	2600	};
1145		2601
1146	static void	2602	static void
1147	once_cb (struct ev_once *once, int revents)	2603	once_cb (EV_P_ struct ev_once *once, int revents)
1148	{	2604	{
1149	void (*cb)(int revents, void *arg) = once->cb;	2605	void (*cb)(int revents, void *arg) = once->cb;
1150	void *arg = once->arg;	2606	void *arg = once->arg;
1151		2607
1152	ev_io_stop (&once->io);	2608	ev_io_stop (EV_A_ &once->io);
1153	ev_timer_stop (&once->to);	2609	ev_timer_stop (EV_A_ &once->to);
1154	free (once);	2610	ev_free (once);
1155		2611
1156	cb (revents, arg);	2612	cb (revents, arg);
1157	}	2613	}
1158		2614
1159	static void	2615	static void
1160	once_cb_io (struct ev_io *w, int revents)	2616	once_cb_io (EV_P_ ev_io *w, int revents)
1161	{	2617	{
1162	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2618	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1163	}	2619	}
1164		2620
1165	static void	2621	static void
1166	once_cb_to (struct ev_timer *w, int revents)	2622	once_cb_to (EV_P_ ev_timer *w, int revents)
1167	{	2623	{
1168	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2624	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1169	}	2625	}
1170		2626
1171	void	2627	void
1172	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2628	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1173	{	2629	{
1174	struct ev_once *once = malloc (sizeof (struct ev_once));	2630	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1175		2631
1176	if (!once)	2632	if (expect_false (!once))
		2633	{
1177	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2634	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1178	else	2635	return;
1179	{	2636	}
		2637
1180	once->cb = cb;	2638	once->cb = cb;
1181	once->arg = arg;	2639	once->arg = arg;
1182		2640
1183	ev_watcher_init (&once->io, once_cb_io);	2641	ev_init (&once->io, once_cb_io);
1184	if (fd >= 0)	2642	if (fd >= 0)
1185	{	2643	{
1186	ev_io_set (&once->io, fd, events);	2644	ev_io_set (&once->io, fd, events);
1187	ev_io_start (&once->io);	2645	ev_io_start (EV_A_ &once->io);
1188	}	2646	}
1189		2647
1190	ev_watcher_init (&once->to, once_cb_to);	2648	ev_init (&once->to, once_cb_to);
1191	if (timeout >= 0.)	2649	if (timeout >= 0.)
1192	{	2650	{
1193	ev_timer_set (&once->to, timeout, 0.);	2651	ev_timer_set (&once->to, timeout, 0.);
1194	ev_timer_start (&once->to);	2652	ev_timer_start (EV_A_ &once->to);
1195	}
1196	}
1197	}
1198
1199	/*****************************************************************************/
1200
1201	#if 0
1202
1203	struct ev_io wio;
1204
1205	static void
1206	sin_cb (struct ev_io *w, int revents)
1207	{
1208	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1209	}
1210
1211	static void
1212	ocb (struct ev_timer *w, int revents)
1213	{
1214	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1215	ev_timer_stop (w);
1216	ev_timer_start (w);
1217	}
1218
1219	static void
1220	scb (struct ev_signal *w, int revents)
1221	{
1222	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1223	ev_io_stop (&wio);
1224	ev_io_start (&wio);
1225	}
1226
1227	static void
1228	gcb (struct ev_signal *w, int revents)
1229	{
1230	fprintf (stderr, "generic %x\n", revents);
1231
1232	}
1233
1234	int main (void)
1235	{
1236	ev_init (0);
1237
1238	ev_io_init (&wio, sin_cb, 0, EV_READ);
1239	ev_io_start (&wio);
1240
1241	struct ev_timer t[10000];
1242
1243	#if 0
1244	int i;
1245	for (i = 0; i < 10000; ++i)
1246	{	2653	}
1247	struct ev_timer *w = t + i;
1248	ev_watcher_init (w, ocb, i);
1249	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1250	ev_timer_start (w);
1251	if (drand48 () < 0.5)
1252	ev_timer_stop (w);
1253	}
1254	#endif
1255
1256	struct ev_timer t1;
1257	ev_timer_init (&t1, ocb, 5, 10);
1258	ev_timer_start (&t1);
1259
1260	struct ev_signal sig;
1261	ev_signal_init (&sig, scb, SIGQUIT);
1262	ev_signal_start (&sig);
1263
1264	struct ev_check cw;
1265	ev_check_init (&cw, gcb);
1266	ev_check_start (&cw);
1267
1268	struct ev_idle iw;
1269	ev_idle_init (&iw, gcb);
1270	ev_idle_start (&iw);
1271
1272	ev_loop (0);
1273
1274	return 0;
1275	}	2654	}
1276		2655
		2656	#if EV_MULTIPLICITY
		2657	#include "ev_wrap.h"
1277	#endif	2658	#endif
1278		2659
		2660	#ifdef __cplusplus
		2661	}
		2662	#endif
1279		2663
1280
1281

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