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Comparing libev/ev.c (file contents):
Revision 1.5 by root, Tue Oct 30 23:54:38 2007 UTC vs.
Revision 1.226 by root, Fri Apr 18 17:16:44 2008 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are 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.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
		45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
		49	# include "config.h"
		50	# endif
		51
		52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
		54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
		57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
		74	# endif
		75
		76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
		82	# endif
		83
		84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
		86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
		90	# endif
		91
		92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
		98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
		132	#endif
		133
1	#include <math.h>	134	#include <math.h>
2	#include <stdlib.h>	135	#include <stdlib.h>
		136	#include <fcntl.h>
		137	#include <stddef.h>
3		138
4	#include <stdio.h>	139	#include <stdio.h>
5		140
6	#include <assert.h>	141	#include <assert.h>
7	#include <errno.h>	142	#include <errno.h>
8	#include <sys/time.h>	143	#include <sys/types.h>
9	#include <time.h>	144	#include <time.h>
10		145
		146	#include <signal.h>
		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
		154	#ifndef _WIN32
		155	# include <sys/time.h>
		156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
		163	# endif
		164	#endif
		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
		167
		168	#ifndef EV_USE_MONOTONIC
		169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
		178	#endif
		179
		180	#ifndef EV_USE_SELECT
		181	# define EV_USE_SELECT 1
		182	#endif
		183
		184	#ifndef EV_USE_POLL
		185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
		190	#endif
		191
		192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
		196	# define EV_USE_EPOLL 0
		197	# endif
		198	#endif
		199
		200	#ifndef EV_USE_KQUEUE
		201	# define EV_USE_KQUEUE 0
		202	#endif
		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
		208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
		213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		241
11	#ifdef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
		243	# undef EV_USE_MONOTONIC
12	# define HAVE_MONOTONIC 1	244	# define EV_USE_MONOTONIC 0
		245	#endif
		246
		247	#ifndef CLOCK_REALTIME
		248	# undef EV_USE_REALTIME
		249	# define EV_USE_REALTIME 0
		250	#endif
		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
13	#endif	260	# endif
		261	#endif
14		262
15	#define HAVE_EPOLL 1	263	#if EV_USE_INOTIFY
16	#define HAVE_REALTIME 1	264	# include <sys/inotify.h>
17	#define HAVE_SELECT 1	265	#endif
		266
		267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
		283	/**/
		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
18		294
19	#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) */
20	#define MAX_BLOCKTIME 60.	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
21		298
		299	#if __GNUC__ >= 4
		300	# define expect(expr,value) __builtin_expect ((expr),(value))
		301	# define noinline __attribute__ ((noinline))
		302	#else
		303	# define expect(expr,value) (expr)
		304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
		308	#endif
		309
		310	#define expect_false(expr) expect ((expr) != 0, 0)
		311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
		319
		320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
		326	typedef ev_watcher *W;
		327	typedef ev_watcher_list *WL;
		328	typedef ev_watcher_time *WT;
		329
		330	#if EV_USE_MONOTONIC
		331	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		332	/* giving it a reasonably high chance of working on typical architetcures */
		333	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		334	#endif
		335
		336	#ifdef _WIN32
		337	# include "ev_win32.c"
		338	#endif
		339
		340	/*****************************************************************************/
		341
		342	static void (*syserr_cb)(const char *msg);
		343
		344	void
		345	ev_set_syserr_cb (void (*cb)(const char *msg))
		346	{
		347	syserr_cb = cb;
		348	}
		349
		350	static void noinline
		351	syserr (const char *msg)
		352	{
		353	if (!msg)
		354	msg = "(libev) system error";
		355
		356	if (syserr_cb)
		357	syserr_cb (msg);
		358	else
		359	{
		360	perror (msg);
		361	abort ();
		362	}
		363	}
		364
		365	static void *
		366	ev_realloc_emul (void *ptr, long size)
		367	{
		368	/* some systems, notably openbsd and darwin, fail to properly
		369	* implement realloc (x, 0) (as required by both ansi c-98 and
		370	* the single unix specification, so work around them here.
		371	*/
		372
		373	if (size)
		374	return realloc (ptr, size);
		375
		376	free (ptr);
		377	return 0;
		378	}
		379
		380	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		381
		382	void
		383	ev_set_allocator (void *(*cb)(void *ptr, long size))
		384	{
		385	alloc = cb;
		386	}
		387
		388	inline_speed void *
		389	ev_realloc (void *ptr, long size)
		390	{
		391	ptr = alloc (ptr, size);
		392
		393	if (!ptr && size)
		394	{
		395	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		396	abort ();
		397	}
		398
		399	return ptr;
		400	}
		401
		402	#define ev_malloc(size) ev_realloc (0, (size))
		403	#define ev_free(ptr) ev_realloc ((ptr), 0)
		404
		405	/*****************************************************************************/
		406
		407	typedef struct
		408	{
		409	WL head;
		410	unsigned char events;
		411	unsigned char reify;
		412	#if EV_SELECT_IS_WINSOCKET
		413	SOCKET handle;
		414	#endif
		415	} ANFD;
		416
		417	typedef struct
		418	{
		419	W w;
		420	int events;
		421	} ANPENDING;
		422
		423	#if EV_USE_INOTIFY
		424	typedef struct
		425	{
		426	WL head;
		427	} ANFS;
		428	#endif
		429
		430	#if EV_MULTIPLICITY
		431
		432	struct ev_loop
		433	{
		434	ev_tstamp ev_rt_now;
		435	#define ev_rt_now ((loop)->ev_rt_now)
		436	#define VAR(name,decl) decl;
		437	#include "ev_vars.h"
		438	#undef VAR
		439	};
22	#include "ev.h"	440	#include "ev_wrap.h"
23		441
24	struct ev_watcher {	442	static struct ev_loop default_loop_struct;
25	EV_WATCHER (ev_watcher);	443	struct ev_loop *ev_default_loop_ptr;
26	};
27		444
28	struct ev_watcher_list {	445	#else
29	EV_WATCHER_LIST (ev_watcher_list);
30	};
31		446
32	static ev_tstamp now, diff; /* monotonic clock */
33	ev_tstamp ev_now;	447	ev_tstamp ev_rt_now;
34	int ev_method;	448	#define VAR(name,decl) static decl;
		449	#include "ev_vars.h"
		450	#undef VAR
35		451
36	static int have_monotonic; /* runtime */	452	static int ev_default_loop_ptr;
37		453
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	454	#endif
39	static void (*method_modify)(int fd, int oev, int nev);	455
40	static void (*method_poll)(ev_tstamp timeout);	456	/*****************************************************************************/
41		457
42	ev_tstamp	458	ev_tstamp
43	ev_time (void)	459	ev_time (void)
44	{	460	{
45	#if HAVE_REALTIME	461	#if EV_USE_REALTIME
46	struct timespec ts;	462	struct timespec ts;
47	clock_gettime (CLOCK_REALTIME, &ts);	463	clock_gettime (CLOCK_REALTIME, &ts);
48	return ts.tv_sec + ts.tv_nsec * 1e-9;	464	return ts.tv_sec + ts.tv_nsec * 1e-9;
49	#else	465	#else
50	struct timeval tv;	466	struct timeval tv;
51	gettimeofday (&tv, 0);	467	gettimeofday (&tv, 0);
52	return tv.tv_sec + tv.tv_usec * 1e-6;	468	return tv.tv_sec + tv.tv_usec * 1e-6;
53	#endif	469	#endif
54	}	470	}
55		471
56	static ev_tstamp	472	ev_tstamp inline_size
57	get_clock (void)	473	get_clock (void)
58	{	474	{
59	#if HAVE_MONOTONIC	475	#if EV_USE_MONOTONIC
60	if (have_monotonic)	476	if (expect_true (have_monotonic))
61	{	477	{
62	struct timespec ts;	478	struct timespec ts;
63	clock_gettime (CLOCK_MONOTONIC, &ts);	479	clock_gettime (CLOCK_MONOTONIC, &ts);
64	return ts.tv_sec + ts.tv_nsec * 1e-9;	480	return ts.tv_sec + ts.tv_nsec * 1e-9;
65	}	481	}
66	#endif	482	#endif
67		483
68	return ev_time ();	484	return ev_time ();
69	}	485	}
70		486
		487	#if EV_MULTIPLICITY
		488	ev_tstamp
		489	ev_now (EV_P)
		490	{
		491	return ev_rt_now;
		492	}
		493	#endif
		494
		495	void
		496	ev_sleep (ev_tstamp delay)
		497	{
		498	if (delay > 0.)
		499	{
		500	#if EV_USE_NANOSLEEP
		501	struct timespec ts;
		502
		503	ts.tv_sec = (time_t)delay;
		504	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		505
		506	nanosleep (&ts, 0);
		507	#elif defined(_WIN32)
		508	Sleep ((unsigned long)(delay * 1e3));
		509	#else
		510	struct timeval tv;
		511
		512	tv.tv_sec = (time_t)delay;
		513	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		514
		515	select (0, 0, 0, 0, &tv);
		516	#endif
		517	}
		518	}
		519
		520	/*****************************************************************************/
		521
		522	int inline_size
		523	array_nextsize (int elem, int cur, int cnt)
		524	{
		525	int ncur = cur + 1;
		526
		527	do
		528	ncur <<= 1;
		529	while (cnt > ncur);
		530
		531	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		532	if (elem * ncur > 4096)
		533	{
		534	ncur *= elem;
		535	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		536	ncur = ncur - sizeof (void *) * 4;
		537	ncur /= elem;
		538	}
		539
		540	return ncur;
		541	}
		542
		543	static noinline void *
		544	array_realloc (int elem, void *base, int *cur, int cnt)
		545	{
		546	*cur = array_nextsize (elem, *cur, cnt);
		547	return ev_realloc (base, elem * *cur);
		548	}
		549
71	#define array_needsize(base,cur,cnt,init) \	550	#define array_needsize(type,base,cur,cnt,init) \
72	if ((cnt) > cur) \	551	if (expect_false ((cnt) > (cur))) \
73	{ \	552	{ \
74	int newcnt = cur ? cur << 1 : 16; \	553	int ocur_ = (cur); \
75	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	554	(base) = (type *)array_realloc \
76	base = realloc (base, sizeof (*base) * (newcnt)); \	555	(sizeof (type), (base), &(cur), (cnt)); \
77	init (base + cur, newcnt - cur); \	556	init ((base) + (ocur_), (cur) - ocur_); \
78	cur = newcnt; \	557	}
		558
		559	#if 0
		560	#define array_slim(type,stem) \
		561	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		562	{ \
		563	stem ## max = array_roundsize (stem ## cnt >> 1); \
		564	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		565	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		566	}
		567	#endif
		568
		569	#define array_free(stem, idx) \
		570	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		571
		572	/*****************************************************************************/
		573
		574	void noinline
		575	ev_feed_event (EV_P_ void *w, int revents)
		576	{
		577	W w_ = (W)w;
		578	int pri = ABSPRI (w_);
		579
		580	if (expect_false (w_->pending))
		581	pendings [pri][w_->pending - 1].events |= revents;
		582	else
79	}	583	{
		584	w_->pending = ++pendingcnt [pri];
		585	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		586	pendings [pri][w_->pending - 1].w = w_;
		587	pendings [pri][w_->pending - 1].events = revents;
		588	}
		589	}
80		590
81	typedef struct	591	void inline_speed
		592	queue_events (EV_P_ W *events, int eventcnt, int type)
82	{	593	{
83	struct ev_io *head;	594	int i;
84	unsigned char wev, rev; /* want, received event set */
85	} ANFD;
86		595
87	static ANFD *anfds;	596	for (i = 0; i < eventcnt; ++i)
88	static int anfdmax;	597	ev_feed_event (EV_A_ events [i], type);
		598	}
89		599
90	static int *fdchanges;	600	/*****************************************************************************/
91	static int fdchangemax, fdchangecnt;
92		601
93	static void	602	void inline_size
94	anfds_init (ANFD *base, int count)	603	anfds_init (ANFD *base, int count)
95	{	604	{
96	while (count--)	605	while (count--)
97	{	606	{
98	base->head = 0;	607	base->head = 0;
99	base->wev = base->rev = EV_NONE;	608	base->events = EV_NONE;
		609	base->reify = 0;
		610
100	++base;	611	++base;
101	}	612	}
102	}	613	}
103		614
104	typedef struct	615	void inline_speed
105	{
106	struct ev_watcher *w;
107	int events;
108	} ANPENDING;
109
110	static ANPENDING *pendings;
111	static int pendingmax, pendingcnt;
112
113	static void
114	event (struct ev_watcher *w, int events)
115	{
116	w->pending = ++pendingcnt;
117	array_needsize (pendings, pendingmax, pendingcnt, );
118	pendings [pendingcnt - 1].w = w;
119	pendings [pendingcnt - 1].events = events;
120	}
121
122	static void
123	fd_event (int fd, int events)	616	fd_event (EV_P_ int fd, int revents)
124	{	617	{
125	ANFD *anfd = anfds + fd;	618	ANFD *anfd = anfds + fd;
126	struct ev_io *w;	619	ev_io *w;
127		620
128	for (w = anfd->head; w; w = w->next)	621	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
129	{	622	{
130	int ev = w->events & events;	623	int ev = w->events & revents;
131		624
132	if (ev)	625	if (ev)
133	event ((struct ev_watcher *)w, ev);	626	ev_feed_event (EV_A_ (W)w, ev);
134	}
135	}
136
137	static struct ev_timer **atimers;
138	static int atimermax, atimercnt;
139
140	static struct ev_timer **rtimers;
141	static int rtimermax, rtimercnt;
142
143	static void
144	upheap (struct ev_timer **timers, int k)
145	{
146	struct ev_timer *w = timers [k];
147
148	while (k && timers [k >> 1]->at > w->at)
149	{	627	}
150	timers [k] = timers [k >> 1];
151	timers [k]->active = k + 1;
152	k >>= 1;
153	}
154
155	timers [k] = w;
156	timers [k]->active = k + 1;
157
158	}	628	}
159		629
160	static void	630	void
161	downheap (struct ev_timer **timers, int N, int k)	631	ev_feed_fd_event (EV_P_ int fd, int revents)
162	{	632	{
163	struct ev_timer *w = timers [k];	633	if (fd >= 0 && fd < anfdmax)
164		634	fd_event (EV_A_ fd, revents);
165	while (k < (N >> 1))
166	{
167	int j = k << 1;
168
169	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
170	++j;
171
172	if (w->at <= timers [j]->at)
173	break;
174
175	timers [k] = timers [j];
176	timers [k]->active = k + 1;
177	k = j;
178	}
179
180	timers [k] = w;
181	timers [k]->active = k + 1;
182	}	635	}
183		636
184	static struct ev_signal **signals;	637	void inline_size
185	static int signalmax;	638	fd_reify (EV_P)
186
187	static void
188	signals_init (struct ev_signal **base, int count)
189	{
190	while (count--)
191	*base++ = 0;
192	}
193
194	#if HAVE_EPOLL
195	# include "ev_epoll.c"
196	#endif
197	#if HAVE_SELECT
198	# include "ev_select.c"
199	#endif
200
201	int ev_init (int flags)
202	{
203	#if HAVE_MONOTONIC
204	{
205	struct timespec ts;
206	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
207	have_monotonic = 1;
208	}
209	#endif
210
211	ev_now = ev_time ();
212	now = get_clock ();
213	diff = ev_now - now;
214
215	#if HAVE_EPOLL
216	if (epoll_init (flags))
217	return ev_method;
218	#endif
219	#if HAVE_SELECT
220	if (select_init (flags))
221	return ev_method;
222	#endif
223
224	ev_method = EVMETHOD_NONE;
225	return ev_method;
226	}
227
228	void ev_prefork (void)
229	{
230	}
231
232	void ev_postfork_parent (void)
233	{
234	}
235
236	void ev_postfork_child (void)
237	{
238	#if HAVE_EPOLL
239	if (ev_method == EVMETHOD_EPOLL)
240	epoll_postfork_child ();
241	#endif
242	}
243
244	static void
245	fd_reify (void)
246	{	639	{
247	int i;	640	int i;
248		641
249	for (i = 0; i < fdchangecnt; ++i)	642	for (i = 0; i < fdchangecnt; ++i)
250	{	643	{
251	int fd = fdchanges [i];	644	int fd = fdchanges [i];
252	ANFD *anfd = anfds + fd;	645	ANFD *anfd = anfds + fd;
253	struct ev_io *w;	646	ev_io *w;
254		647
255	int wev = 0;	648	unsigned char events = 0;
256		649
257	for (w = anfd->head; w; w = w->next)	650	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
258	wev |= w->events;	651	events |= (unsigned char)w->events;
259		652
260	if (anfd->wev != wev)	653	#if EV_SELECT_IS_WINSOCKET
		654	if (events)
261	{	655	{
262	method_modify (fd, anfd->wev, wev);	656	unsigned long argp;
263	anfd->wev = wev;	657	#ifdef EV_FD_TO_WIN32_HANDLE
		658	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		659	#else
		660	anfd->handle = _get_osfhandle (fd);
		661	#endif
		662	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
264	}	663	}
		664	#endif
		665
		666	{
		667	unsigned char o_events = anfd->events;
		668	unsigned char o_reify = anfd->reify;
		669
		670	anfd->reify = 0;
		671	anfd->events = events;
		672
		673	if (o_events != events || o_reify & EV_IOFDSET)
		674	backend_modify (EV_A_ fd, o_events, events);
		675	}
265	}	676	}
266		677
267	fdchangecnt = 0;	678	fdchangecnt = 0;
268	}	679	}
269		680
		681	void inline_size
		682	fd_change (EV_P_ int fd, int flags)
		683	{
		684	unsigned char reify = anfds [fd].reify;
		685	anfds [fd].reify |= flags;
		686
		687	if (expect_true (!reify))
		688	{
		689	++fdchangecnt;
		690	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		691	fdchanges [fdchangecnt - 1] = fd;
		692	}
		693	}
		694
		695	void inline_speed
		696	fd_kill (EV_P_ int fd)
		697	{
		698	ev_io *w;
		699
		700	while ((w = (ev_io *)anfds [fd].head))
		701	{
		702	ev_io_stop (EV_A_ w);
		703	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		704	}
		705	}
		706
		707	int inline_size
		708	fd_valid (int fd)
		709	{
		710	#ifdef _WIN32
		711	return _get_osfhandle (fd) != -1;
		712	#else
		713	return fcntl (fd, F_GETFD) != -1;
		714	#endif
		715	}
		716
		717	/* called on EBADF to verify fds */
		718	static void noinline
		719	fd_ebadf (EV_P)
		720	{
		721	int fd;
		722
		723	for (fd = 0; fd < anfdmax; ++fd)
		724	if (anfds [fd].events)
		725	if (!fd_valid (fd) == -1 && errno == EBADF)
		726	fd_kill (EV_A_ fd);
		727	}
		728
		729	/* called on ENOMEM in select/poll to kill some fds and retry */
		730	static void noinline
		731	fd_enomem (EV_P)
		732	{
		733	int fd;
		734
		735	for (fd = anfdmax; fd--; )
		736	if (anfds [fd].events)
		737	{
		738	fd_kill (EV_A_ fd);
		739	return;
		740	}
		741	}
		742
		743	/* usually called after fork if backend needs to re-arm all fds from scratch */
		744	static void noinline
		745	fd_rearm_all (EV_P)
		746	{
		747	int fd;
		748
		749	for (fd = 0; fd < anfdmax; ++fd)
		750	if (anfds [fd].events)
		751	{
		752	anfds [fd].events = 0;
		753	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		754	}
		755	}
		756
		757	/*****************************************************************************/
		758
		759	void inline_speed
		760	upheap (WT *heap, int k)
		761	{
		762	WT w = heap [k];
		763
		764	while (k)
		765	{
		766	int p = (k - 1) >> 1;
		767
		768	if (heap [p]->at <= w->at)
		769	break;
		770
		771	heap [k] = heap [p];
		772	((W)heap [k])->active = k + 1;
		773	k = p;
		774	}
		775
		776	heap [k] = w;
		777	((W)heap [k])->active = k + 1;
		778	}
		779
		780	void inline_speed
		781	downheap (WT *heap, int N, int k)
		782	{
		783	WT w = heap [k];
		784
		785	for (;;)
		786	{
		787	int c = (k << 1) + 1;
		788
		789	if (c >= N)
		790	break;
		791
		792	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		793	? 1 : 0;
		794
		795	if (w->at <= heap [c]->at)
		796	break;
		797
		798	heap [k] = heap [c];
		799	((W)heap [k])->active = k + 1;
		800
		801	k = c;
		802	}
		803
		804	heap [k] = w;
		805	((W)heap [k])->active = k + 1;
		806	}
		807
		808	void inline_size
		809	adjustheap (WT *heap, int N, int k)
		810	{
		811	upheap (heap, k);
		812	downheap (heap, N, k);
		813	}
		814
		815	/*****************************************************************************/
		816
		817	typedef struct
		818	{
		819	WL head;
		820	EV_ATOMIC_T gotsig;
		821	} ANSIG;
		822
		823	static ANSIG *signals;
		824	static int signalmax;
		825
		826	static EV_ATOMIC_T gotsig;
		827
		828	void inline_size
		829	signals_init (ANSIG *base, int count)
		830	{
		831	while (count--)
		832	{
		833	base->head = 0;
		834	base->gotsig = 0;
		835
		836	++base;
		837	}
		838	}
		839
		840	/*****************************************************************************/
		841
		842	void inline_speed
		843	fd_intern (int fd)
		844	{
		845	#ifdef _WIN32
		846	int arg = 1;
		847	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		848	#else
		849	fcntl (fd, F_SETFD, FD_CLOEXEC);
		850	fcntl (fd, F_SETFL, O_NONBLOCK);
		851	#endif
		852	}
		853
		854	static void noinline
		855	evpipe_init (EV_P)
		856	{
		857	if (!ev_is_active (&pipeev))
		858	{
		859	#if EV_USE_EVENTFD
		860	if ((evfd = eventfd (0, 0)) >= 0)
		861	{
		862	evpipe [0] = -1;
		863	fd_intern (evfd);
		864	ev_io_set (&pipeev, evfd, EV_READ);
		865	}
		866	else
		867	#endif
		868	{
		869	while (pipe (evpipe))
		870	syserr ("(libev) error creating signal/async pipe");
		871
		872	fd_intern (evpipe [0]);
		873	fd_intern (evpipe [1]);
		874	ev_io_set (&pipeev, evpipe [0], EV_READ);
		875	}
		876
		877	ev_io_start (EV_A_ &pipeev);
		878	ev_unref (EV_A); /* watcher should not keep loop alive */
		879	}
		880	}
		881
		882	void inline_size
		883	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		884	{
		885	if (!*flag)
		886	{
		887	int old_errno = errno; /* save errno because write might clobber it */
		888
		889	*flag = 1;
		890
		891	#if EV_USE_EVENTFD
		892	if (evfd >= 0)
		893	{
		894	uint64_t counter = 1;
		895	write (evfd, &counter, sizeof (uint64_t));
		896	}
		897	else
		898	#endif
		899	write (evpipe [1], &old_errno, 1);
		900
		901	errno = old_errno;
		902	}
		903	}
		904
270	static void	905	static void
271	call_pending ()	906	pipecb (EV_P_ ev_io *iow, int revents)
		907	{
		908	#if EV_USE_EVENTFD
		909	if (evfd >= 0)
		910	{
		911	uint64_t counter = 1;
		912	read (evfd, &counter, sizeof (uint64_t));
		913	}
		914	else
		915	#endif
		916	{
		917	char dummy;
		918	read (evpipe [0], &dummy, 1);
		919	}
		920
		921	if (gotsig && ev_is_default_loop (EV_A))
		922	{
		923	int signum;
		924	gotsig = 0;
		925
		926	for (signum = signalmax; signum--; )
		927	if (signals [signum].gotsig)
		928	ev_feed_signal_event (EV_A_ signum + 1);
		929	}
		930
		931	#if EV_ASYNC_ENABLE
		932	if (gotasync)
		933	{
		934	int i;
		935	gotasync = 0;
		936
		937	for (i = asynccnt; i--; )
		938	if (asyncs [i]->sent)
		939	{
		940	asyncs [i]->sent = 0;
		941	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		942	}
		943	}
		944	#endif
		945	}
		946
		947	/*****************************************************************************/
		948
		949	static void
		950	ev_sighandler (int signum)
		951	{
		952	#if EV_MULTIPLICITY
		953	struct ev_loop *loop = &default_loop_struct;
		954	#endif
		955
		956	#if _WIN32
		957	signal (signum, ev_sighandler);
		958	#endif
		959
		960	signals [signum - 1].gotsig = 1;
		961	evpipe_write (EV_A_ &gotsig);
		962	}
		963
		964	void noinline
		965	ev_feed_signal_event (EV_P_ int signum)
		966	{
		967	WL w;
		968
		969	#if EV_MULTIPLICITY
		970	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		971	#endif
		972
		973	--signum;
		974
		975	if (signum < 0 || signum >= signalmax)
		976	return;
		977
		978	signals [signum].gotsig = 0;
		979
		980	for (w = signals [signum].head; w; w = w->next)
		981	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		982	}
		983
		984	/*****************************************************************************/
		985
		986	static WL childs [EV_PID_HASHSIZE];
		987
		988	#ifndef _WIN32
		989
		990	static ev_signal childev;
		991
		992	#ifndef WIFCONTINUED
		993	# define WIFCONTINUED(status) 0
		994	#endif
		995
		996	void inline_speed
		997	child_reap (EV_P_ int chain, int pid, int status)
		998	{
		999	ev_child *w;
		1000	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1001
		1002	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1003	{
		1004	if ((w->pid == pid || !w->pid)
		1005	&& (!traced || (w->flags & 1)))
		1006	{
		1007	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1008	w->rpid = pid;
		1009	w->rstatus = status;
		1010	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1011	}
		1012	}
		1013	}
		1014
		1015	#ifndef WCONTINUED
		1016	# define WCONTINUED 0
		1017	#endif
		1018
		1019	static void
		1020	childcb (EV_P_ ev_signal *sw, int revents)
		1021	{
		1022	int pid, status;
		1023
		1024	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1025	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		1026	if (!WCONTINUED
		1027	|| errno != EINVAL
		1028	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1029	return;
		1030
		1031	/* make sure we are called again until all children have been reaped */
		1032	/* we need to do it this way so that the callback gets called before we continue */
		1033	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1034
		1035	child_reap (EV_A_ pid, pid, status);
		1036	if (EV_PID_HASHSIZE > 1)
		1037	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1038	}
		1039
		1040	#endif
		1041
		1042	/*****************************************************************************/
		1043
		1044	#if EV_USE_PORT
		1045	# include "ev_port.c"
		1046	#endif
		1047	#if EV_USE_KQUEUE
		1048	# include "ev_kqueue.c"
		1049	#endif
		1050	#if EV_USE_EPOLL
		1051	# include "ev_epoll.c"
		1052	#endif
		1053	#if EV_USE_POLL
		1054	# include "ev_poll.c"
		1055	#endif
		1056	#if EV_USE_SELECT
		1057	# include "ev_select.c"
		1058	#endif
		1059
		1060	int
		1061	ev_version_major (void)
		1062	{
		1063	return EV_VERSION_MAJOR;
		1064	}
		1065
		1066	int
		1067	ev_version_minor (void)
		1068	{
		1069	return EV_VERSION_MINOR;
		1070	}
		1071
		1072	/* return true if we are running with elevated privileges and should ignore env variables */
		1073	int inline_size
		1074	enable_secure (void)
		1075	{
		1076	#ifdef _WIN32
		1077	return 0;
		1078	#else
		1079	return getuid () != geteuid ()
		1080	|| getgid () != getegid ();
		1081	#endif
		1082	}
		1083
		1084	unsigned int
		1085	ev_supported_backends (void)
		1086	{
		1087	unsigned int flags = 0;
		1088
		1089	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1090	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1091	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1092	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1093	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1094
		1095	return flags;
		1096	}
		1097
		1098	unsigned int
		1099	ev_recommended_backends (void)
		1100	{
		1101	unsigned int flags = ev_supported_backends ();
		1102
		1103	#ifndef __NetBSD__
		1104	/* kqueue is borked on everything but netbsd apparently */
		1105	/* it usually doesn't work correctly on anything but sockets and pipes */
		1106	flags &= ~EVBACKEND_KQUEUE;
		1107	#endif
		1108	#ifdef __APPLE__
		1109	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1110	flags &= ~EVBACKEND_POLL;
		1111	#endif
		1112
		1113	return flags;
		1114	}
		1115
		1116	unsigned int
		1117	ev_embeddable_backends (void)
		1118	{
		1119	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1120
		1121	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1122	/* please fix it and tell me how to detect the fix */
		1123	flags &= ~EVBACKEND_EPOLL;
		1124
		1125	return flags;
		1126	}
		1127
		1128	unsigned int
		1129	ev_backend (EV_P)
		1130	{
		1131	return backend;
		1132	}
		1133
		1134	unsigned int
		1135	ev_loop_count (EV_P)
		1136	{
		1137	return loop_count;
		1138	}
		1139
		1140	void
		1141	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1142	{
		1143	io_blocktime = interval;
		1144	}
		1145
		1146	void
		1147	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1148	{
		1149	timeout_blocktime = interval;
		1150	}
		1151
		1152	static void noinline
		1153	loop_init (EV_P_ unsigned int flags)
		1154	{
		1155	if (!backend)
		1156	{
		1157	#if EV_USE_MONOTONIC
		1158	{
		1159	struct timespec ts;
		1160	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1161	have_monotonic = 1;
		1162	}
		1163	#endif
		1164
		1165	ev_rt_now = ev_time ();
		1166	mn_now = get_clock ();
		1167	now_floor = mn_now;
		1168	rtmn_diff = ev_rt_now - mn_now;
		1169
		1170	io_blocktime = 0.;
		1171	timeout_blocktime = 0.;
		1172	backend = 0;
		1173	backend_fd = -1;
		1174	gotasync = 0;
		1175	#if EV_USE_INOTIFY
		1176	fs_fd = -2;
		1177	#endif
		1178
		1179	/* pid check not overridable via env */
		1180	#ifndef _WIN32
		1181	if (flags & EVFLAG_FORKCHECK)
		1182	curpid = getpid ();
		1183	#endif
		1184
		1185	if (!(flags & EVFLAG_NOENV)
		1186	&& !enable_secure ()
		1187	&& getenv ("LIBEV_FLAGS"))
		1188	flags = atoi (getenv ("LIBEV_FLAGS"));
		1189
		1190	if (!(flags & 0x0000ffffU))
		1191	flags |= ev_recommended_backends ();
		1192
		1193	#if EV_USE_PORT
		1194	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1195	#endif
		1196	#if EV_USE_KQUEUE
		1197	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1198	#endif
		1199	#if EV_USE_EPOLL
		1200	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1201	#endif
		1202	#if EV_USE_POLL
		1203	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1204	#endif
		1205	#if EV_USE_SELECT
		1206	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1207	#endif
		1208
		1209	ev_init (&pipeev, pipecb);
		1210	ev_set_priority (&pipeev, EV_MAXPRI);
		1211	}
		1212	}
		1213
		1214	static void noinline
		1215	loop_destroy (EV_P)
272	{	1216	{
273	int i;	1217	int i;
274		1218
275	for (i = 0; i < pendingcnt; ++i)	1219	if (ev_is_active (&pipeev))
276	{	1220	{
277	ANPENDING *p = pendings + i;	1221	ev_ref (EV_A); /* signal watcher */
		1222	ev_io_stop (EV_A_ &pipeev);
278		1223
279	if (p->w)	1224	#if EV_USE_EVENTFD
		1225	if (evfd >= 0)
		1226	close (evfd);
		1227	#endif
		1228
		1229	if (evpipe [0] >= 0)
280	{	1230	{
281	p->w->pending = 0;	1231	close (evpipe [0]);
282	p->w->cb (p->w, p->events);	1232	close (evpipe [1]);
283	}	1233	}
284	}	1234	}
285		1235
286	pendingcnt = 0;	1236	#if EV_USE_INOTIFY
287	}	1237	if (fs_fd >= 0)
		1238	close (fs_fd);
		1239	#endif
288		1240
289	static void	1241	if (backend_fd >= 0)
290	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1242	close (backend_fd);
		1243
		1244	#if EV_USE_PORT
		1245	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1246	#endif
		1247	#if EV_USE_KQUEUE
		1248	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1249	#endif
		1250	#if EV_USE_EPOLL
		1251	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1252	#endif
		1253	#if EV_USE_POLL
		1254	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1255	#endif
		1256	#if EV_USE_SELECT
		1257	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1258	#endif
		1259
		1260	for (i = NUMPRI; i--; )
		1261	{
		1262	array_free (pending, [i]);
		1263	#if EV_IDLE_ENABLE
		1264	array_free (idle, [i]);
		1265	#endif
		1266	}
		1267
		1268	ev_free (anfds); anfdmax = 0;
		1269
		1270	/* have to use the microsoft-never-gets-it-right macro */
		1271	array_free (fdchange, EMPTY);
		1272	array_free (timer, EMPTY);
		1273	#if EV_PERIODIC_ENABLE
		1274	array_free (periodic, EMPTY);
		1275	#endif
		1276	#if EV_FORK_ENABLE
		1277	array_free (fork, EMPTY);
		1278	#endif
		1279	array_free (prepare, EMPTY);
		1280	array_free (check, EMPTY);
		1281	#if EV_ASYNC_ENABLE
		1282	array_free (async, EMPTY);
		1283	#endif
		1284
		1285	backend = 0;
		1286	}
		1287
		1288	#if EV_USE_INOTIFY
		1289	void inline_size infy_fork (EV_P);
		1290	#endif
		1291
		1292	void inline_size
		1293	loop_fork (EV_P)
291	{	1294	{
		1295	#if EV_USE_PORT
		1296	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1297	#endif
		1298	#if EV_USE_KQUEUE
		1299	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1300	#endif
		1301	#if EV_USE_EPOLL
		1302	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1303	#endif
		1304	#if EV_USE_INOTIFY
		1305	infy_fork (EV_A);
		1306	#endif
		1307
		1308	if (ev_is_active (&pipeev))
		1309	{
		1310	/* this "locks" the handlers against writing to the pipe */
		1311	/* while we modify the fd vars */
		1312	gotsig = 1;
		1313	#if EV_ASYNC_ENABLE
		1314	gotasync = 1;
		1315	#endif
		1316
		1317	ev_ref (EV_A);
		1318	ev_io_stop (EV_A_ &pipeev);
		1319
		1320	#if EV_USE_EVENTFD
		1321	if (evfd >= 0)
		1322	close (evfd);
		1323	#endif
		1324
		1325	if (evpipe [0] >= 0)
		1326	{
		1327	close (evpipe [0]);
		1328	close (evpipe [1]);
		1329	}
		1330
		1331	evpipe_init (EV_A);
		1332	/* now iterate over everything, in case we missed something */
		1333	pipecb (EV_A_ &pipeev, EV_READ);
		1334	}
		1335
		1336	postfork = 0;
		1337	}
		1338
		1339	#if EV_MULTIPLICITY
		1340	struct ev_loop *
		1341	ev_loop_new (unsigned int flags)
		1342	{
		1343	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1344
		1345	memset (loop, 0, sizeof (struct ev_loop));
		1346
		1347	loop_init (EV_A_ flags);
		1348
		1349	if (ev_backend (EV_A))
		1350	return loop;
		1351
		1352	return 0;
		1353	}
		1354
		1355	void
		1356	ev_loop_destroy (EV_P)
		1357	{
		1358	loop_destroy (EV_A);
		1359	ev_free (loop);
		1360	}
		1361
		1362	void
		1363	ev_loop_fork (EV_P)
		1364	{
		1365	postfork = 1; /* must be in line with ev_default_fork */
		1366	}
		1367
		1368	#endif
		1369
		1370	#if EV_MULTIPLICITY
		1371	struct ev_loop *
		1372	ev_default_loop_init (unsigned int flags)
		1373	#else
		1374	int
		1375	ev_default_loop (unsigned int flags)
		1376	#endif
		1377	{
		1378	if (!ev_default_loop_ptr)
		1379	{
		1380	#if EV_MULTIPLICITY
		1381	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1382	#else
		1383	ev_default_loop_ptr = 1;
		1384	#endif
		1385
		1386	loop_init (EV_A_ flags);
		1387
		1388	if (ev_backend (EV_A))
		1389	{
		1390	#ifndef _WIN32
		1391	ev_signal_init (&childev, childcb, SIGCHLD);
		1392	ev_set_priority (&childev, EV_MAXPRI);
		1393	ev_signal_start (EV_A_ &childev);
		1394	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1395	#endif
		1396	}
		1397	else
		1398	ev_default_loop_ptr = 0;
		1399	}
		1400
		1401	return ev_default_loop_ptr;
		1402	}
		1403
		1404	void
		1405	ev_default_destroy (void)
		1406	{
		1407	#if EV_MULTIPLICITY
		1408	struct ev_loop *loop = ev_default_loop_ptr;
		1409	#endif
		1410
		1411	#ifndef _WIN32
		1412	ev_ref (EV_A); /* child watcher */
		1413	ev_signal_stop (EV_A_ &childev);
		1414	#endif
		1415
		1416	loop_destroy (EV_A);
		1417	}
		1418
		1419	void
		1420	ev_default_fork (void)
		1421	{
		1422	#if EV_MULTIPLICITY
		1423	struct ev_loop *loop = ev_default_loop_ptr;
		1424	#endif
		1425
		1426	if (backend)
		1427	postfork = 1; /* must be in line with ev_loop_fork */
		1428	}
		1429
		1430	/*****************************************************************************/
		1431
		1432	void
		1433	ev_invoke (EV_P_ void *w, int revents)
		1434	{
		1435	EV_CB_INVOKE ((W)w, revents);
		1436	}
		1437
		1438	void inline_speed
		1439	call_pending (EV_P)
		1440	{
		1441	int pri;
		1442
		1443	for (pri = NUMPRI; pri--; )
		1444	while (pendingcnt [pri])
		1445	{
		1446	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1447
		1448	if (expect_true (p->w))
		1449	{
		1450	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1451
		1452	p->w->pending = 0;
		1453	EV_CB_INVOKE (p->w, p->events);
		1454	}
		1455	}
		1456	}
		1457
		1458	void inline_size
		1459	timers_reify (EV_P)
		1460	{
292	while (timercnt && timers [0]->at <= now)	1461	while (timercnt && ((WT)timers [0])->at <= mn_now)
293	{	1462	{
294	struct ev_timer *w = timers [0];	1463	ev_timer *w = (ev_timer *)timers [0];
		1464
		1465	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
295		1466
296	/* first reschedule or stop timer */	1467	/* first reschedule or stop timer */
297	if (w->repeat)	1468	if (w->repeat)
298	{	1469	{
299	if (w->is_abs)	1470	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
300	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1471
301	else
302	w->at = now + w->repeat;	1472	((WT)w)->at += w->repeat;
303		1473	if (((WT)w)->at < mn_now)
304	assert (w->at > now);	1474	((WT)w)->at = mn_now;
305		1475
306	downheap (timers, timercnt, 0);	1476	downheap (timers, timercnt, 0);
307	}	1477	}
308	else	1478	else
		1479	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1480
		1481	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1482	}
		1483	}
		1484
		1485	#if EV_PERIODIC_ENABLE
		1486	void inline_size
		1487	periodics_reify (EV_P)
		1488	{
		1489	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1490	{
		1491	ev_periodic *w = (ev_periodic *)periodics [0];
		1492
		1493	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1494
		1495	/* first reschedule or stop timer */
		1496	if (w->reschedule_cb)
309	{	1497	{
310	evtimer_stop (w); /* nonrepeating: stop timer */	1498	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
311	--timercnt; /* maybe pass by reference instead? */	1499	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1500	downheap (periodics, periodiccnt, 0);
312	}	1501	}
		1502	else if (w->interval)
		1503	{
		1504	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1505	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1506	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1507	downheap (periodics, periodiccnt, 0);
		1508	}
		1509	else
		1510	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
313		1511
314	event ((struct ev_watcher *)w, EV_TIMEOUT);	1512	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
315	}	1513	}
316	}	1514	}
317		1515
318	static void	1516	static void noinline
319	time_update ()	1517	periodics_reschedule (EV_P)
320	{	1518	{
321	int i;	1519	int i;
322	ev_now = ev_time ();
323		1520
324	if (have_monotonic)	1521	/* adjust periodics after time jump */
		1522	for (i = 0; i < periodiccnt; ++i)
		1523	{
		1524	ev_periodic *w = (ev_periodic *)periodics [i];
		1525
		1526	if (w->reschedule_cb)
		1527	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1528	else if (w->interval)
		1529	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
325	{	1530	}
326	ev_tstamp odiff = diff;
327		1531
328	/* detecting time jumps is much more difficult */	1532	/* now rebuild the heap */
329	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1533	for (i = periodiccnt >> 1; i--; )
		1534	downheap (periodics, periodiccnt, i);
		1535	}
		1536	#endif
		1537
		1538	#if EV_IDLE_ENABLE
		1539	void inline_size
		1540	idle_reify (EV_P)
		1541	{
		1542	if (expect_false (idleall))
		1543	{
		1544	int pri;
		1545
		1546	for (pri = NUMPRI; pri--; )
330	{	1547	{
		1548	if (pendingcnt [pri])
		1549	break;
		1550
		1551	if (idlecnt [pri])
		1552	{
		1553	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1554	break;
		1555	}
		1556	}
		1557	}
		1558	}
		1559	#endif
		1560
		1561	void inline_speed
		1562	time_update (EV_P_ ev_tstamp max_block)
		1563	{
		1564	int i;
		1565
		1566	#if EV_USE_MONOTONIC
		1567	if (expect_true (have_monotonic))
		1568	{
		1569	ev_tstamp odiff = rtmn_diff;
		1570
331	now = get_clock ();	1571	mn_now = get_clock ();
		1572
		1573	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1574	/* interpolate in the meantime */
		1575	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1576	{
		1577	ev_rt_now = rtmn_diff + mn_now;
		1578	return;
		1579	}
		1580
		1581	now_floor = mn_now;
		1582	ev_rt_now = ev_time ();
		1583
		1584	/* loop a few times, before making important decisions.
		1585	* on the choice of "4": one iteration isn't enough,
		1586	* in case we get preempted during the calls to
		1587	* ev_time and get_clock. a second call is almost guaranteed
		1588	* to succeed in that case, though. and looping a few more times
		1589	* doesn't hurt either as we only do this on time-jumps or
		1590	* in the unlikely event of having been preempted here.
		1591	*/
		1592	for (i = 4; --i; )
		1593	{
332	diff = ev_now - now;	1594	rtmn_diff = ev_rt_now - mn_now;
333		1595
334	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1596	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
335	return; /* all is well */	1597	return; /* all is well */
336		1598
337	ev_now = ev_time ();	1599	ev_rt_now = ev_time ();
		1600	mn_now = get_clock ();
		1601	now_floor = mn_now;
338	}	1602	}
339		1603
340	/* time jump detected, reschedule atimers */	1604	# if EV_PERIODIC_ENABLE
341	for (i = 0; i < atimercnt; ++i)	1605	periodics_reschedule (EV_A);
		1606	# endif
		1607	/* no timer adjustment, as the monotonic clock doesn't jump */
		1608	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1609	}
		1610	else
		1611	#endif
		1612	{
		1613	ev_rt_now = ev_time ();
		1614
		1615	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
342	{	1616	{
343	struct ev_timer *w = atimers [i];	1617	#if EV_PERIODIC_ENABLE
344	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1618	periodics_reschedule (EV_A);
		1619	#endif
		1620	/* adjust timers. this is easy, as the offset is the same for all of them */
		1621	for (i = 0; i < timercnt; ++i)
		1622	((WT)timers [i])->at += ev_rt_now - mn_now;
345	}	1623	}
346	}
347	else
348	{
349	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
350	/* time jump detected, adjust rtimers */
351	for (i = 0; i < rtimercnt; ++i)
352	rtimers [i]->at += ev_now - now;
353		1624
354	now = ev_now;	1625	mn_now = ev_rt_now;
355	}	1626	}
356	}	1627	}
357		1628
358	int ev_loop_done;	1629	void
		1630	ev_ref (EV_P)
		1631	{
		1632	++activecnt;
		1633	}
359		1634
		1635	void
		1636	ev_unref (EV_P)
		1637	{
		1638	--activecnt;
		1639	}
		1640
		1641	static int loop_done;
		1642
		1643	void
360	void ev_loop (int flags)	1644	ev_loop (EV_P_ int flags)
361	{	1645	{
362	double block;	1646	loop_done = EVUNLOOP_CANCEL;
363	ev_loop_done = flags & EVLOOP_ONESHOT;	1647
		1648	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
364		1649
365	do	1650	do
366	{	1651	{
		1652	#ifndef _WIN32
		1653	if (expect_false (curpid)) /* penalise the forking check even more */
		1654	if (expect_false (getpid () != curpid))
		1655	{
		1656	curpid = getpid ();
		1657	postfork = 1;
		1658	}
		1659	#endif
		1660
		1661	#if EV_FORK_ENABLE
		1662	/* we might have forked, so queue fork handlers */
		1663	if (expect_false (postfork))
		1664	if (forkcnt)
		1665	{
		1666	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1667	call_pending (EV_A);
		1668	}
		1669	#endif
		1670
		1671	/* queue prepare watchers (and execute them) */
		1672	if (expect_false (preparecnt))
		1673	{
		1674	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1675	call_pending (EV_A);
		1676	}
		1677
		1678	if (expect_false (!activecnt))
		1679	break;
		1680
		1681	/* we might have forked, so reify kernel state if necessary */
		1682	if (expect_false (postfork))
		1683	loop_fork (EV_A);
		1684
367	/* update fd-related kernel structures */	1685	/* update fd-related kernel structures */
368	fd_reify ();	1686	fd_reify (EV_A);
369		1687
370	/* calculate blocking time */	1688	/* calculate blocking time */
371	if (flags & EVLOOP_NONBLOCK)	1689	{
372	block = 0.;	1690	ev_tstamp waittime = 0.;
373	else	1691	ev_tstamp sleeptime = 0.;
		1692
		1693	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
374	{	1694	{
		1695	/* update time to cancel out callback processing overhead */
		1696	time_update (EV_A_ 1e100);
		1697
375	block = MAX_BLOCKTIME;	1698	waittime = MAX_BLOCKTIME;
376		1699
377	if (rtimercnt)	1700	if (timercnt)
378	{	1701	{
379	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1702	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
380	if (block > to) block = to;	1703	if (waittime > to) waittime = to;
381	}	1704	}
382		1705
		1706	#if EV_PERIODIC_ENABLE
383	if (atimercnt)	1707	if (periodiccnt)
384	{	1708	{
385	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1709	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
386	if (block > to) block = to;	1710	if (waittime > to) waittime = to;
387	}	1711	}
		1712	#endif
388		1713
389	if (block < 0.) block = 0.;	1714	if (expect_false (waittime < timeout_blocktime))
		1715	waittime = timeout_blocktime;
		1716
		1717	sleeptime = waittime - backend_fudge;
		1718
		1719	if (expect_true (sleeptime > io_blocktime))
		1720	sleeptime = io_blocktime;
		1721
		1722	if (sleeptime)
		1723	{
		1724	ev_sleep (sleeptime);
		1725	waittime -= sleeptime;
		1726	}
390	}	1727	}
391		1728
392	method_poll (block);	1729	++loop_count;
		1730	backend_poll (EV_A_ waittime);
393		1731
394	/* update ev_now, do magic */	1732	/* update ev_rt_now, do magic */
395	time_update ();	1733	time_update (EV_A_ waittime + sleeptime);
		1734	}
396		1735
397	/* put pending timers into pendign queue and reschedule them */	1736	/* queue pending timers and reschedule them */
398	/* absolute timers first */	1737	timers_reify (EV_A); /* relative timers called last */
399	timers_reify (atimers, atimercnt, ev_now);	1738	#if EV_PERIODIC_ENABLE
400	/* relative timers second */	1739	periodics_reify (EV_A); /* absolute timers called first */
401	timers_reify (rtimers, rtimercnt, now);	1740	#endif
402		1741
		1742	#if EV_IDLE_ENABLE
		1743	/* queue idle watchers unless other events are pending */
		1744	idle_reify (EV_A);
		1745	#endif
		1746
		1747	/* queue check watchers, to be executed first */
		1748	if (expect_false (checkcnt))
		1749	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1750
403	call_pending ();	1751	call_pending (EV_A);
404	}	1752	}
405	while (!ev_loop_done);	1753	while (expect_true (
406	}	1754	activecnt
		1755	&& !loop_done
		1756	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1757	));
407		1758
408	static void	1759	if (loop_done == EVUNLOOP_ONE)
409	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1760	loop_done = EVUNLOOP_CANCEL;
		1761	}
		1762
		1763	void
		1764	ev_unloop (EV_P_ int how)
		1765	{
		1766	loop_done = how;
		1767	}
		1768
		1769	/*****************************************************************************/
		1770
		1771	void inline_size
		1772	wlist_add (WL *head, WL elem)
410	{	1773	{
411	elem->next = *head;	1774	elem->next = *head;
412	*head = elem;	1775	*head = elem;
413	}	1776	}
414		1777
415	static void	1778	void inline_size
416	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1779	wlist_del (WL *head, WL elem)
417	{	1780	{
418	while (*head)	1781	while (*head)
419	{	1782	{
420	if (*head == elem)	1783	if (*head == elem)
421	{	1784	{
…		…
425		1788
426	head = &(*head)->next;	1789	head = &(*head)->next;
427	}	1790	}
428	}	1791	}
429		1792
		1793	void inline_speed
		1794	clear_pending (EV_P_ W w)
		1795	{
		1796	if (w->pending)
		1797	{
		1798	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1799	w->pending = 0;
		1800	}
		1801	}
		1802
		1803	int
		1804	ev_clear_pending (EV_P_ void *w)
		1805	{
		1806	W w_ = (W)w;
		1807	int pending = w_->pending;
		1808
		1809	if (expect_true (pending))
		1810	{
		1811	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1812	w_->pending = 0;
		1813	p->w = 0;
		1814	return p->events;
		1815	}
		1816	else
		1817	return 0;
		1818	}
		1819
		1820	void inline_size
		1821	pri_adjust (EV_P_ W w)
		1822	{
		1823	int pri = w->priority;
		1824	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1825	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1826	w->priority = pri;
		1827	}
		1828
		1829	void inline_speed
		1830	ev_start (EV_P_ W w, int active)
		1831	{
		1832	pri_adjust (EV_A_ w);
		1833	w->active = active;
		1834	ev_ref (EV_A);
		1835	}
		1836
		1837	void inline_size
		1838	ev_stop (EV_P_ W w)
		1839	{
		1840	ev_unref (EV_A);
		1841	w->active = 0;
		1842	}
		1843
		1844	/*****************************************************************************/
		1845
		1846	void noinline
		1847	ev_io_start (EV_P_ ev_io *w)
		1848	{
		1849	int fd = w->fd;
		1850
		1851	if (expect_false (ev_is_active (w)))
		1852	return;
		1853
		1854	assert (("ev_io_start called with negative fd", fd >= 0));
		1855
		1856	ev_start (EV_A_ (W)w, 1);
		1857	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1858	wlist_add (&anfds[fd].head, (WL)w);
		1859
		1860	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1861	w->events &= ~EV_IOFDSET;
		1862	}
		1863
		1864	void noinline
		1865	ev_io_stop (EV_P_ ev_io *w)
		1866	{
		1867	clear_pending (EV_A_ (W)w);
		1868	if (expect_false (!ev_is_active (w)))
		1869	return;
		1870
		1871	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1872
		1873	wlist_del (&anfds[w->fd].head, (WL)w);
		1874	ev_stop (EV_A_ (W)w);
		1875
		1876	fd_change (EV_A_ w->fd, 1);
		1877	}
		1878
		1879	void noinline
		1880	ev_timer_start (EV_P_ ev_timer *w)
		1881	{
		1882	if (expect_false (ev_is_active (w)))
		1883	return;
		1884
		1885	((WT)w)->at += mn_now;
		1886
		1887	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1888
		1889	ev_start (EV_A_ (W)w, ++timercnt);
		1890	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1891	timers [timercnt - 1] = (WT)w;
		1892	upheap (timers, timercnt - 1);
		1893
		1894	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1895	}
		1896
		1897	void noinline
		1898	ev_timer_stop (EV_P_ ev_timer *w)
		1899	{
		1900	clear_pending (EV_A_ (W)w);
		1901	if (expect_false (!ev_is_active (w)))
		1902	return;
		1903
		1904	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1905
		1906	{
		1907	int active = ((W)w)->active;
		1908
		1909	if (expect_true (--active < --timercnt))
		1910	{
		1911	timers [active] = timers [timercnt];
		1912	adjustheap (timers, timercnt, active);
		1913	}
		1914	}
		1915
		1916	((WT)w)->at -= mn_now;
		1917
		1918	ev_stop (EV_A_ (W)w);
		1919	}
		1920
		1921	void noinline
		1922	ev_timer_again (EV_P_ ev_timer *w)
		1923	{
		1924	if (ev_is_active (w))
		1925	{
		1926	if (w->repeat)
		1927	{
		1928	((WT)w)->at = mn_now + w->repeat;
		1929	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1930	}
		1931	else
		1932	ev_timer_stop (EV_A_ w);
		1933	}
		1934	else if (w->repeat)
		1935	{
		1936	w->at = w->repeat;
		1937	ev_timer_start (EV_A_ w);
		1938	}
		1939	}
		1940
		1941	#if EV_PERIODIC_ENABLE
		1942	void noinline
		1943	ev_periodic_start (EV_P_ ev_periodic *w)
		1944	{
		1945	if (expect_false (ev_is_active (w)))
		1946	return;
		1947
		1948	if (w->reschedule_cb)
		1949	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1950	else if (w->interval)
		1951	{
		1952	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1953	/* this formula differs from the one in periodic_reify because we do not always round up */
		1954	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1955	}
		1956	else
		1957	((WT)w)->at = w->offset;
		1958
		1959	ev_start (EV_A_ (W)w, ++periodiccnt);
		1960	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
		1961	periodics [periodiccnt - 1] = (WT)w;
		1962	upheap (periodics, periodiccnt - 1);
		1963
		1964	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1965	}
		1966
		1967	void noinline
		1968	ev_periodic_stop (EV_P_ ev_periodic *w)
		1969	{
		1970	clear_pending (EV_A_ (W)w);
		1971	if (expect_false (!ev_is_active (w)))
		1972	return;
		1973
		1974	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1975
		1976	{
		1977	int active = ((W)w)->active;
		1978
		1979	if (expect_true (--active < --periodiccnt))
		1980	{
		1981	periodics [active] = periodics [periodiccnt];
		1982	adjustheap (periodics, periodiccnt, active);
		1983	}
		1984	}
		1985
		1986	ev_stop (EV_A_ (W)w);
		1987	}
		1988
		1989	void noinline
		1990	ev_periodic_again (EV_P_ ev_periodic *w)
		1991	{
		1992	/* TODO: use adjustheap and recalculation */
		1993	ev_periodic_stop (EV_A_ w);
		1994	ev_periodic_start (EV_A_ w);
		1995	}
		1996	#endif
		1997
		1998	#ifndef SA_RESTART
		1999	# define SA_RESTART 0
		2000	#endif
		2001
		2002	void noinline
		2003	ev_signal_start (EV_P_ ev_signal *w)
		2004	{
		2005	#if EV_MULTIPLICITY
		2006	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2007	#endif
		2008	if (expect_false (ev_is_active (w)))
		2009	return;
		2010
		2011	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2012
		2013	evpipe_init (EV_A);
		2014
		2015	{
		2016	#ifndef _WIN32
		2017	sigset_t full, prev;
		2018	sigfillset (&full);
		2019	sigprocmask (SIG_SETMASK, &full, &prev);
		2020	#endif
		2021
		2022	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2023
		2024	#ifndef _WIN32
		2025	sigprocmask (SIG_SETMASK, &prev, 0);
		2026	#endif
		2027	}
		2028
		2029	ev_start (EV_A_ (W)w, 1);
		2030	wlist_add (&signals [w->signum - 1].head, (WL)w);
		2031
		2032	if (!((WL)w)->next)
		2033	{
		2034	#if _WIN32
		2035	signal (w->signum, ev_sighandler);
		2036	#else
		2037	struct sigaction sa;
		2038	sa.sa_handler = ev_sighandler;
		2039	sigfillset (&sa.sa_mask);
		2040	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		2041	sigaction (w->signum, &sa, 0);
		2042	#endif
		2043	}
		2044	}
		2045
		2046	void noinline
		2047	ev_signal_stop (EV_P_ ev_signal *w)
		2048	{
		2049	clear_pending (EV_A_ (W)w);
		2050	if (expect_false (!ev_is_active (w)))
		2051	return;
		2052
		2053	wlist_del (&signals [w->signum - 1].head, (WL)w);
		2054	ev_stop (EV_A_ (W)w);
		2055
		2056	if (!signals [w->signum - 1].head)
		2057	signal (w->signum, SIG_DFL);
		2058	}
		2059
		2060	void
		2061	ev_child_start (EV_P_ ev_child *w)
		2062	{
		2063	#if EV_MULTIPLICITY
		2064	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2065	#endif
		2066	if (expect_false (ev_is_active (w)))
		2067	return;
		2068
		2069	ev_start (EV_A_ (W)w, 1);
		2070	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2071	}
		2072
		2073	void
		2074	ev_child_stop (EV_P_ ev_child *w)
		2075	{
		2076	clear_pending (EV_A_ (W)w);
		2077	if (expect_false (!ev_is_active (w)))
		2078	return;
		2079
		2080	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2081	ev_stop (EV_A_ (W)w);
		2082	}
		2083
		2084	#if EV_STAT_ENABLE
		2085
		2086	# ifdef _WIN32
		2087	# undef lstat
		2088	# define lstat(a,b) _stati64 (a,b)
		2089	# endif
		2090
		2091	#define DEF_STAT_INTERVAL 5.0074891
		2092	#define MIN_STAT_INTERVAL 0.1074891
		2093
		2094	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2095
		2096	#if EV_USE_INOTIFY
		2097	# define EV_INOTIFY_BUFSIZE 8192
		2098
		2099	static void noinline
		2100	infy_add (EV_P_ ev_stat *w)
		2101	{
		2102	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);
		2103
		2104	if (w->wd < 0)
		2105	{
		2106	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2107
		2108	/* monitor some parent directory for speedup hints */
		2109	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2110	{
		2111	char path [4096];
		2112	strcpy (path, w->path);
		2113
		2114	do
		2115	{
		2116	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2117	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2118
		2119	char *pend = strrchr (path, '/');
		2120
		2121	if (!pend)
		2122	break; /* whoops, no '/', complain to your admin */
		2123
		2124	*pend = 0;
		2125	w->wd = inotify_add_watch (fs_fd, path, mask);
		2126	}
		2127	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2128	}
		2129	}
		2130	else
		2131	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2132
		2133	if (w->wd >= 0)
		2134	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2135	}
		2136
		2137	static void noinline
		2138	infy_del (EV_P_ ev_stat *w)
		2139	{
		2140	int slot;
		2141	int wd = w->wd;
		2142
		2143	if (wd < 0)
		2144	return;
		2145
		2146	w->wd = -2;
		2147	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2148	wlist_del (&fs_hash [slot].head, (WL)w);
		2149
		2150	/* remove this watcher, if others are watching it, they will rearm */
		2151	inotify_rm_watch (fs_fd, wd);
		2152	}
		2153
		2154	static void noinline
		2155	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2156	{
		2157	if (slot < 0)
		2158	/* overflow, need to check for all hahs slots */
		2159	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2160	infy_wd (EV_A_ slot, wd, ev);
		2161	else
		2162	{
		2163	WL w_;
		2164
		2165	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2166	{
		2167	ev_stat *w = (ev_stat *)w_;
		2168	w_ = w_->next; /* lets us remove this watcher and all before it */
		2169
		2170	if (w->wd == wd || wd == -1)
		2171	{
		2172	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2173	{
		2174	w->wd = -1;
		2175	infy_add (EV_A_ w); /* re-add, no matter what */
		2176	}
		2177
		2178	stat_timer_cb (EV_A_ &w->timer, 0);
		2179	}
		2180	}
		2181	}
		2182	}
		2183
430	static void	2184	static void
431	ev_start (struct ev_watcher *w, int active)	2185	infy_cb (EV_P_ ev_io *w, int revents)
432	{	2186	{
433	w->pending = 0;	2187	char buf [EV_INOTIFY_BUFSIZE];
434	w->active = active;	2188	struct inotify_event *ev = (struct inotify_event *)buf;
		2189	int ofs;
		2190	int len = read (fs_fd, buf, sizeof (buf));
		2191
		2192	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2193	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2194	}
		2195
		2196	void inline_size
		2197	infy_init (EV_P)
		2198	{
		2199	if (fs_fd != -2)
		2200	return;
		2201
		2202	fs_fd = inotify_init ();
		2203
		2204	if (fs_fd >= 0)
		2205	{
		2206	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2207	ev_set_priority (&fs_w, EV_MAXPRI);
		2208	ev_io_start (EV_A_ &fs_w);
		2209	}
		2210	}
		2211
		2212	void inline_size
		2213	infy_fork (EV_P)
		2214	{
		2215	int slot;
		2216
		2217	if (fs_fd < 0)
		2218	return;
		2219
		2220	close (fs_fd);
		2221	fs_fd = inotify_init ();
		2222
		2223	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2224	{
		2225	WL w_ = fs_hash [slot].head;
		2226	fs_hash [slot].head = 0;
		2227
		2228	while (w_)
		2229	{
		2230	ev_stat *w = (ev_stat *)w_;
		2231	w_ = w_->next; /* lets us add this watcher */
		2232
		2233	w->wd = -1;
		2234
		2235	if (fs_fd >= 0)
		2236	infy_add (EV_A_ w); /* re-add, no matter what */
		2237	else
		2238	ev_timer_start (EV_A_ &w->timer);
		2239	}
		2240
		2241	}
		2242	}
		2243
		2244	#endif
		2245
		2246	void
		2247	ev_stat_stat (EV_P_ ev_stat *w)
		2248	{
		2249	if (lstat (w->path, &w->attr) < 0)
		2250	w->attr.st_nlink = 0;
		2251	else if (!w->attr.st_nlink)
		2252	w->attr.st_nlink = 1;
		2253	}
		2254
		2255	static void noinline
		2256	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2257	{
		2258	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2259
		2260	/* we copy this here each the time so that */
		2261	/* prev has the old value when the callback gets invoked */
		2262	w->prev = w->attr;
		2263	ev_stat_stat (EV_A_ w);
		2264
		2265	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2266	if (
		2267	w->prev.st_dev != w->attr.st_dev
		2268	|| w->prev.st_ino != w->attr.st_ino
		2269	|| w->prev.st_mode != w->attr.st_mode
		2270	|| w->prev.st_nlink != w->attr.st_nlink
		2271	|| w->prev.st_uid != w->attr.st_uid
		2272	|| w->prev.st_gid != w->attr.st_gid
		2273	|| w->prev.st_rdev != w->attr.st_rdev
		2274	|| w->prev.st_size != w->attr.st_size
		2275	|| w->prev.st_atime != w->attr.st_atime
		2276	|| w->prev.st_mtime != w->attr.st_mtime
		2277	|| w->prev.st_ctime != w->attr.st_ctime
		2278	) {
		2279	#if EV_USE_INOTIFY
		2280	infy_del (EV_A_ w);
		2281	infy_add (EV_A_ w);
		2282	ev_stat_stat (EV_A_ w); /* avoid race... */
		2283	#endif
		2284
		2285	ev_feed_event (EV_A_ w, EV_STAT);
		2286	}
		2287	}
		2288
		2289	void
		2290	ev_stat_start (EV_P_ ev_stat *w)
		2291	{
		2292	if (expect_false (ev_is_active (w)))
		2293	return;
		2294
		2295	/* since we use memcmp, we need to clear any padding data etc. */
		2296	memset (&w->prev, 0, sizeof (ev_statdata));
		2297	memset (&w->attr, 0, sizeof (ev_statdata));
		2298
		2299	ev_stat_stat (EV_A_ w);
		2300
		2301	if (w->interval < MIN_STAT_INTERVAL)
		2302	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2303
		2304	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2305	ev_set_priority (&w->timer, ev_priority (w));
		2306
		2307	#if EV_USE_INOTIFY
		2308	infy_init (EV_A);
		2309
		2310	if (fs_fd >= 0)
		2311	infy_add (EV_A_ w);
		2312	else
		2313	#endif
		2314	ev_timer_start (EV_A_ &w->timer);
		2315
		2316	ev_start (EV_A_ (W)w, 1);
		2317	}
		2318
		2319	void
		2320	ev_stat_stop (EV_P_ ev_stat *w)
		2321	{
		2322	clear_pending (EV_A_ (W)w);
		2323	if (expect_false (!ev_is_active (w)))
		2324	return;
		2325
		2326	#if EV_USE_INOTIFY
		2327	infy_del (EV_A_ w);
		2328	#endif
		2329	ev_timer_stop (EV_A_ &w->timer);
		2330
		2331	ev_stop (EV_A_ (W)w);
		2332	}
		2333	#endif
		2334
		2335	#if EV_IDLE_ENABLE
		2336	void
		2337	ev_idle_start (EV_P_ ev_idle *w)
		2338	{
		2339	if (expect_false (ev_is_active (w)))
		2340	return;
		2341
		2342	pri_adjust (EV_A_ (W)w);
		2343
		2344	{
		2345	int active = ++idlecnt [ABSPRI (w)];
		2346
		2347	++idleall;
		2348	ev_start (EV_A_ (W)w, active);
		2349
		2350	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2351	idles [ABSPRI (w)][active - 1] = w;
		2352	}
		2353	}
		2354
		2355	void
		2356	ev_idle_stop (EV_P_ ev_idle *w)
		2357	{
		2358	clear_pending (EV_A_ (W)w);
		2359	if (expect_false (!ev_is_active (w)))
		2360	return;
		2361
		2362	{
		2363	int active = ((W)w)->active;
		2364
		2365	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2366	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2367
		2368	ev_stop (EV_A_ (W)w);
		2369	--idleall;
		2370	}
		2371	}
		2372	#endif
		2373
		2374	void
		2375	ev_prepare_start (EV_P_ ev_prepare *w)
		2376	{
		2377	if (expect_false (ev_is_active (w)))
		2378	return;
		2379
		2380	ev_start (EV_A_ (W)w, ++preparecnt);
		2381	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2382	prepares [preparecnt - 1] = w;
		2383	}
		2384
		2385	void
		2386	ev_prepare_stop (EV_P_ ev_prepare *w)
		2387	{
		2388	clear_pending (EV_A_ (W)w);
		2389	if (expect_false (!ev_is_active (w)))
		2390	return;
		2391
		2392	{
		2393	int active = ((W)w)->active;
		2394	prepares [active - 1] = prepares [--preparecnt];
		2395	((W)prepares [active - 1])->active = active;
		2396	}
		2397
		2398	ev_stop (EV_A_ (W)w);
		2399	}
		2400
		2401	void
		2402	ev_check_start (EV_P_ ev_check *w)
		2403	{
		2404	if (expect_false (ev_is_active (w)))
		2405	return;
		2406
		2407	ev_start (EV_A_ (W)w, ++checkcnt);
		2408	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2409	checks [checkcnt - 1] = w;
		2410	}
		2411
		2412	void
		2413	ev_check_stop (EV_P_ ev_check *w)
		2414	{
		2415	clear_pending (EV_A_ (W)w);
		2416	if (expect_false (!ev_is_active (w)))
		2417	return;
		2418
		2419	{
		2420	int active = ((W)w)->active;
		2421	checks [active - 1] = checks [--checkcnt];
		2422	((W)checks [active - 1])->active = active;
		2423	}
		2424
		2425	ev_stop (EV_A_ (W)w);
		2426	}
		2427
		2428	#if EV_EMBED_ENABLE
		2429	void noinline
		2430	ev_embed_sweep (EV_P_ ev_embed *w)
		2431	{
		2432	ev_loop (w->other, EVLOOP_NONBLOCK);
435	}	2433	}
436		2434
437	static void	2435	static void
438	ev_stop (struct ev_watcher *w)	2436	embed_io_cb (EV_P_ ev_io *io, int revents)
439	{	2437	{
440	if (w->pending)	2438	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
441	pendings [w->pending - 1].w = 0;
442		2439
443	w->active = 0;
444	/* nop */
445	}
446
447	void
448	evio_start (struct ev_io *w)
449	{
450	if (ev_is_active (w))	2440	if (ev_cb (w))
451	return;	2441	ev_feed_event (EV_A_ (W)w, EV_EMBED);
452
453	int fd = w->fd;
454
455	ev_start ((struct ev_watcher *)w, 1);
456	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
457	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
458
459	++fdchangecnt;
460	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
461	fdchanges [fdchangecnt - 1] = fd;
462	}
463
464	void
465	evio_stop (struct ev_io *w)
466	{
467	if (!ev_is_active (w))
468	return;
469
470	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
471	ev_stop ((struct ev_watcher *)w);
472
473	++fdchangecnt;
474	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
475	fdchanges [fdchangecnt - 1] = w->fd;
476	}
477
478	void
479	evtimer_start (struct ev_timer *w)
480	{
481	if (ev_is_active (w))
482	return;
483
484	if (w->is_abs)
485	{
486	/* this formula differs from the one in timer_reify becuse we do not round up */
487	if (w->repeat)
488	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
489
490	ev_start ((struct ev_watcher *)w, ++atimercnt);
491	array_needsize (atimers, atimermax, atimercnt, );
492	atimers [atimercnt - 1] = w;
493	upheap (atimers, atimercnt - 1);
494	}
495	else	2442	else
		2443	ev_loop (w->other, EVLOOP_NONBLOCK);
		2444	}
		2445
		2446	static void
		2447	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2448	{
		2449	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2450
496	{	2451	{
497	w->at += now;	2452	struct ev_loop *loop = w->other;
498		2453
499	ev_start ((struct ev_watcher *)w, ++rtimercnt);	2454	while (fdchangecnt)
500	array_needsize (rtimers, rtimermax, rtimercnt, );
501	rtimers [rtimercnt - 1] = w;
502	upheap (rtimers, rtimercnt - 1);
503	}
504
505	}
506
507	void
508	evtimer_stop (struct ev_timer *w)
509	{
510	if (!ev_is_active (w))
511	return;
512
513	if (w->is_abs)
514	{
515	if (w->active < atimercnt--)
516	{	2455	{
517	atimers [w->active - 1] = atimers [atimercnt];	2456	fd_reify (EV_A);
518	downheap (atimers, atimercnt, w->active - 1);	2457	ev_loop (EV_A_ EVLOOP_NONBLOCK);
519	}	2458	}
520	}	2459	}
521	else
522	{
523	if (w->active < rtimercnt--)
524	{
525	rtimers [w->active - 1] = rtimers [rtimercnt];
526	downheap (rtimers, rtimercnt, w->active - 1);
527	}
528	}
529
530	ev_stop ((struct ev_watcher *)w);
531	}	2460	}
532		2461
533	void	2462	#if 0
534	evsignal_start (struct ev_signal *w)	2463	static void
		2464	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
535	{	2465	{
		2466	ev_idle_stop (EV_A_ idle);
		2467	}
		2468	#endif
		2469
		2470	void
		2471	ev_embed_start (EV_P_ ev_embed *w)
		2472	{
536	if (ev_is_active (w))	2473	if (expect_false (ev_is_active (w)))
537	return;	2474	return;
538		2475
539	ev_start ((struct ev_watcher *)w, 1);	2476	{
540	array_needsize (signals, signalmax, w->signum, signals_init);	2477	struct ev_loop *loop = w->other;
541	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2478	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
542	}	2479	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2480	}
543		2481
		2482	ev_set_priority (&w->io, ev_priority (w));
		2483	ev_io_start (EV_A_ &w->io);
		2484
		2485	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2486	ev_set_priority (&w->prepare, EV_MINPRI);
		2487	ev_prepare_start (EV_A_ &w->prepare);
		2488
		2489	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2490
		2491	ev_start (EV_A_ (W)w, 1);
		2492	}
		2493
544	void	2494	void
545	evsignal_stop (struct ev_signal *w)	2495	ev_embed_stop (EV_P_ ev_embed *w)
546	{	2496	{
		2497	clear_pending (EV_A_ (W)w);
547	if (!ev_is_active (w))	2498	if (expect_false (!ev_is_active (w)))
548	return;	2499	return;
549		2500
550	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2501	ev_io_stop (EV_A_ &w->io);
551	ev_stop ((struct ev_watcher *)w);	2502	ev_prepare_stop (EV_A_ &w->prepare);
		2503
		2504	ev_stop (EV_A_ (W)w);
552	}	2505	}
		2506	#endif
		2507
		2508	#if EV_FORK_ENABLE
		2509	void
		2510	ev_fork_start (EV_P_ ev_fork *w)
		2511	{
		2512	if (expect_false (ev_is_active (w)))
		2513	return;
		2514
		2515	ev_start (EV_A_ (W)w, ++forkcnt);
		2516	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2517	forks [forkcnt - 1] = w;
		2518	}
		2519
		2520	void
		2521	ev_fork_stop (EV_P_ ev_fork *w)
		2522	{
		2523	clear_pending (EV_A_ (W)w);
		2524	if (expect_false (!ev_is_active (w)))
		2525	return;
		2526
		2527	{
		2528	int active = ((W)w)->active;
		2529	forks [active - 1] = forks [--forkcnt];
		2530	((W)forks [active - 1])->active = active;
		2531	}
		2532
		2533	ev_stop (EV_A_ (W)w);
		2534	}
		2535	#endif
		2536
		2537	#if EV_ASYNC_ENABLE
		2538	void
		2539	ev_async_start (EV_P_ ev_async *w)
		2540	{
		2541	if (expect_false (ev_is_active (w)))
		2542	return;
		2543
		2544	evpipe_init (EV_A);
		2545
		2546	ev_start (EV_A_ (W)w, ++asynccnt);
		2547	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2548	asyncs [asynccnt - 1] = w;
		2549	}
		2550
		2551	void
		2552	ev_async_stop (EV_P_ ev_async *w)
		2553	{
		2554	clear_pending (EV_A_ (W)w);
		2555	if (expect_false (!ev_is_active (w)))
		2556	return;
		2557
		2558	{
		2559	int active = ((W)w)->active;
		2560	asyncs [active - 1] = asyncs [--asynccnt];
		2561	((W)asyncs [active - 1])->active = active;
		2562	}
		2563
		2564	ev_stop (EV_A_ (W)w);
		2565	}
		2566
		2567	void
		2568	ev_async_send (EV_P_ ev_async *w)
		2569	{
		2570	w->sent = 1;
		2571	evpipe_write (EV_A_ &gotasync);
		2572	}
		2573	#endif
553		2574
554	/*****************************************************************************/	2575	/*****************************************************************************/
555	#if 1	2576
		2577	struct ev_once
		2578	{
		2579	ev_io io;
		2580	ev_timer to;
		2581	void (*cb)(int revents, void *arg);
		2582	void *arg;
		2583	};
556		2584
557	static void	2585	static void
558	sin_cb (struct ev_io *w, int revents)	2586	once_cb (EV_P_ struct ev_once *once, int revents)
559	{	2587	{
560	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2588	void (*cb)(int revents, void *arg) = once->cb;
		2589	void *arg = once->arg;
		2590
		2591	ev_io_stop (EV_A_ &once->io);
		2592	ev_timer_stop (EV_A_ &once->to);
		2593	ev_free (once);
		2594
		2595	cb (revents, arg);
561	}	2596	}
562		2597
563	static void	2598	static void
		2599	once_cb_io (EV_P_ ev_io *w, int revents)
		2600	{
		2601	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2602	}
		2603
		2604	static void
564	ocb (struct ev_timer *w, int revents)	2605	once_cb_to (EV_P_ ev_timer *w, int revents)
565	{	2606	{
566	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2607	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
567	evtimer_stop (w);
568	evtimer_start (w);
569	}	2608	}
570		2609
571	int main (void)	2610	void
		2611	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
572	{	2612	{
573	struct ev_io sin;	2613	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
574		2614
575	ev_init (0);	2615	if (expect_false (!once))
576
577	evw_init (&sin, sin_cb, 55);
578	evio_set (&sin, 0, EV_READ);
579	evio_start (&sin);
580
581	struct ev_timer t[10000];
582
583	#if 1
584	int i;
585	for (i = 0; i < 10000; ++i)
586	{
587	struct ev_timer *w = t + i;
588	evw_init (w, ocb, i);
589	evtimer_set_abs (w, drand48 (), 0.99775533);
590	evtimer_start (w);
591	if (drand48 () < 0.5)
592	evtimer_stop (w);
593	}	2616	{
594	#endif	2617	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
595
596	struct ev_timer t1;
597	evw_init (&t1, ocb, 0);
598	evtimer_set_abs (&t1, 5, 10);
599	evtimer_start (&t1);
600
601	ev_loop (0);
602
603	return 0;	2618	return;
604	}	2619	}
605		2620
606	#endif	2621	once->cb = cb;
		2622	once->arg = arg;
607		2623
		2624	ev_init (&once->io, once_cb_io);
		2625	if (fd >= 0)
		2626	{
		2627	ev_io_set (&once->io, fd, events);
		2628	ev_io_start (EV_A_ &once->io);
		2629	}
608		2630
		2631	ev_init (&once->to, once_cb_to);
		2632	if (timeout >= 0.)
		2633	{
		2634	ev_timer_set (&once->to, timeout, 0.);
		2635	ev_timer_start (EV_A_ &once->to);
		2636	}
		2637	}
609		2638
		2639	#if EV_MULTIPLICITY
		2640	#include "ev_wrap.h"
		2641	#endif
610		2642
		2643	#ifdef __cplusplus
		2644	}
		2645	#endif
		2646

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