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Comparing libev/ev.c (file contents):
Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs.
Revision 1.228 by root, Fri May 2 08:07:37 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>
3	#include <unistd.h>
4	#include <fcntl.h>	136	#include <fcntl.h>
5	#include <signal.h>	137	#include <stddef.h>
6		138
7	#include <stdio.h>	139	#include <stdio.h>
8		140
9	#include <assert.h>	141	#include <assert.h>
10	#include <errno.h>	142	#include <errno.h>
11	#include <sys/time.h>	143	#include <sys/types.h>
12	#include <time.h>	144	#include <time.h>
13		145
14	#define HAVE_EPOLL 1	146	#include <signal.h>
15		147
16	#ifndef HAVE_MONOTONIC	148	#ifdef EV_H
17	# ifdef CLOCK_MONOTONIC	149	# include EV_H
18	# define HAVE_MONOTONIC 1	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
19	# endif	163	# endif
20	#endif	164	#endif
21		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
22	#ifndef HAVE_SELECT	180	#ifndef EV_USE_SELECT
23	# define HAVE_SELECT 1	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
24	#endif	189	# endif
		190	#endif
25		191
26	#ifndef HAVE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
27	# define HAVE_EPOLL 0	196	# define EV_USE_EPOLL 0
28	#endif	197	# endif
		198	#endif
29		199
30	#ifndef HAVE_REALTIME	200	#ifndef EV_USE_KQUEUE
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	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
32	#endif	213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		241
		242	#ifndef CLOCK_MONOTONIC
		243	# undef EV_USE_MONOTONIC
		244	# define EV_USE_MONOTONIC 0
		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>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
		267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
		283	/**/
		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
33		294
34	#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) */
35	#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 */
36		298
37	#include "ev.h"	299	#if __GNUC__ >= 4
		300	# define expect(expr,value) __builtin_expect ((expr),(value))
		301	# define noinline __attribute__ ((noinline))
		302	#else
		303	# define expect(expr,value) (expr)
		304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
		308	#endif
38		309
39	struct ev_watcher {	310	#define expect_false(expr) expect ((expr) != 0, 0)
40	EV_WATCHER (ev_watcher);	311	#define expect_true(expr) expect ((expr) != 0, 1)
41	};	312	#define inline_size static inline
42		313
43	struct ev_watcher_list {	314	#if EV_MINIMAL
44	EV_WATCHER_LIST (ev_watcher_list);	315	# define inline_speed static noinline
45	};	316	#else
		317	# define inline_speed static inline
		318	#endif
46		319
47	struct ev_watcher_time {	320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
48	EV_WATCHER_TIME (ev_watcher_time);	321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
49	};
50		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
51	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
52	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
53	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
54		329
55	static ev_tstamp now, diff; /* monotonic clock */	330	#define ev_at(w) ((WT)(w))->at
		331
		332	#if EV_USE_MONOTONIC
		333	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		334	/* giving it a reasonably high chance of working on typical architetcures */
		335	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		336	#endif
		337
		338	#ifdef _WIN32
		339	# include "ev_win32.c"
		340	#endif
		341
		342	/*****************************************************************************/
		343
		344	static void (*syserr_cb)(const char *msg);
		345
		346	void
		347	ev_set_syserr_cb (void (*cb)(const char *msg))
		348	{
		349	syserr_cb = cb;
		350	}
		351
		352	static void noinline
		353	syserr (const char *msg)
		354	{
		355	if (!msg)
		356	msg = "(libev) system error";
		357
		358	if (syserr_cb)
		359	syserr_cb (msg);
		360	else
		361	{
		362	perror (msg);
		363	abort ();
		364	}
		365	}
		366
		367	static void *
		368	ev_realloc_emul (void *ptr, long size)
		369	{
		370	/* some systems, notably openbsd and darwin, fail to properly
		371	* implement realloc (x, 0) (as required by both ansi c-98 and
		372	* the single unix specification, so work around them here.
		373	*/
		374
		375	if (size)
		376	return realloc (ptr, size);
		377
		378	free (ptr);
		379	return 0;
		380	}
		381
		382	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		383
		384	void
		385	ev_set_allocator (void *(*cb)(void *ptr, long size))
		386	{
		387	alloc = cb;
		388	}
		389
		390	inline_speed void *
		391	ev_realloc (void *ptr, long size)
		392	{
		393	ptr = alloc (ptr, size);
		394
		395	if (!ptr && size)
		396	{
		397	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		398	abort ();
		399	}
		400
		401	return ptr;
		402	}
		403
		404	#define ev_malloc(size) ev_realloc (0, (size))
		405	#define ev_free(ptr) ev_realloc ((ptr), 0)
		406
		407	/*****************************************************************************/
		408
		409	typedef struct
		410	{
		411	WL head;
		412	unsigned char events;
		413	unsigned char reify;
		414	#if EV_SELECT_IS_WINSOCKET
		415	SOCKET handle;
		416	#endif
		417	} ANFD;
		418
		419	typedef struct
		420	{
		421	W w;
		422	int events;
		423	} ANPENDING;
		424
		425	#if EV_USE_INOTIFY
		426	typedef struct
		427	{
		428	WL head;
		429	} ANFS;
		430	#endif
		431
		432	#if EV_MULTIPLICITY
		433
		434	struct ev_loop
		435	{
		436	ev_tstamp ev_rt_now;
		437	#define ev_rt_now ((loop)->ev_rt_now)
		438	#define VAR(name,decl) decl;
		439	#include "ev_vars.h"
		440	#undef VAR
		441	};
		442	#include "ev_wrap.h"
		443
		444	static struct ev_loop default_loop_struct;
		445	struct ev_loop *ev_default_loop_ptr;
		446
		447	#else
		448
56	ev_tstamp ev_now;	449	ev_tstamp ev_rt_now;
57	int ev_method;	450	#define VAR(name,decl) static decl;
		451	#include "ev_vars.h"
		452	#undef VAR
58		453
59	static int have_monotonic; /* runtime */	454	static int ev_default_loop_ptr;
60		455
61	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	456	#endif
62	static void (*method_modify)(int fd, int oev, int nev);
63	static void (*method_poll)(ev_tstamp timeout);
64		457
65	/*****************************************************************************/	458	/*****************************************************************************/
66		459
67	ev_tstamp	460	ev_tstamp
68	ev_time (void)	461	ev_time (void)
69	{	462	{
70	#if HAVE_REALTIME	463	#if EV_USE_REALTIME
71	struct timespec ts;	464	struct timespec ts;
72	clock_gettime (CLOCK_REALTIME, &ts);	465	clock_gettime (CLOCK_REALTIME, &ts);
73	return ts.tv_sec + ts.tv_nsec * 1e-9;	466	return ts.tv_sec + ts.tv_nsec * 1e-9;
74	#else	467	#else
75	struct timeval tv;	468	struct timeval tv;
76	gettimeofday (&tv, 0);	469	gettimeofday (&tv, 0);
77	return tv.tv_sec + tv.tv_usec * 1e-6;	470	return tv.tv_sec + tv.tv_usec * 1e-6;
78	#endif	471	#endif
79	}	472	}
80		473
81	static ev_tstamp	474	ev_tstamp inline_size
82	get_clock (void)	475	get_clock (void)
83	{	476	{
84	#if HAVE_MONOTONIC	477	#if EV_USE_MONOTONIC
85	if (have_monotonic)	478	if (expect_true (have_monotonic))
86	{	479	{
87	struct timespec ts;	480	struct timespec ts;
88	clock_gettime (CLOCK_MONOTONIC, &ts);	481	clock_gettime (CLOCK_MONOTONIC, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	482	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	}	483	}
91	#endif	484	#endif
92		485
93	return ev_time ();	486	return ev_time ();
94	}	487	}
95		488
96	#define array_needsize(base,cur,cnt,init) \	489	#if EV_MULTIPLICITY
97	if ((cnt) > cur) \	490	ev_tstamp
98	{ \	491	ev_now (EV_P)
99	int newcnt = cur ? cur << 1 : 16; \	492	{
100	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	493	return ev_rt_now;
101	base = realloc (base, sizeof (*base) * (newcnt)); \	494	}
102	init (base + cur, newcnt - cur); \	495	#endif
103	cur = newcnt; \	496
		497	void
		498	ev_sleep (ev_tstamp delay)
		499	{
		500	if (delay > 0.)
104	}	501	{
		502	#if EV_USE_NANOSLEEP
		503	struct timespec ts;
		504
		505	ts.tv_sec = (time_t)delay;
		506	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		507
		508	nanosleep (&ts, 0);
		509	#elif defined(_WIN32)
		510	Sleep ((unsigned long)(delay * 1e3));
		511	#else
		512	struct timeval tv;
		513
		514	tv.tv_sec = (time_t)delay;
		515	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		516
		517	select (0, 0, 0, 0, &tv);
		518	#endif
		519	}
		520	}
105		521
106	/*****************************************************************************/	522	/*****************************************************************************/
107		523
		524	int inline_size
		525	array_nextsize (int elem, int cur, int cnt)
		526	{
		527	int ncur = cur + 1;
		528
		529	do
		530	ncur <<= 1;
		531	while (cnt > ncur);
		532
		533	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		534	if (elem * ncur > 4096)
		535	{
		536	ncur *= elem;
		537	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		538	ncur = ncur - sizeof (void *) * 4;
		539	ncur /= elem;
		540	}
		541
		542	return ncur;
		543	}
		544
		545	static noinline void *
		546	array_realloc (int elem, void *base, int *cur, int cnt)
		547	{
		548	*cur = array_nextsize (elem, *cur, cnt);
		549	return ev_realloc (base, elem * *cur);
		550	}
		551
		552	#define array_needsize(type,base,cur,cnt,init) \
		553	if (expect_false ((cnt) > (cur))) \
		554	{ \
		555	int ocur_ = (cur); \
		556	(base) = (type *)array_realloc \
		557	(sizeof (type), (base), &(cur), (cnt)); \
		558	init ((base) + (ocur_), (cur) - ocur_); \
		559	}
		560
		561	#if 0
		562	#define array_slim(type,stem) \
		563	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		564	{ \
		565	stem ## max = array_roundsize (stem ## cnt >> 1); \
		566	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		567	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		568	}
		569	#endif
		570
		571	#define array_free(stem, idx) \
		572	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		573
		574	/*****************************************************************************/
		575
		576	void noinline
		577	ev_feed_event (EV_P_ void *w, int revents)
		578	{
		579	W w_ = (W)w;
		580	int pri = ABSPRI (w_);
		581
		582	if (expect_false (w_->pending))
		583	pendings [pri][w_->pending - 1].events |= revents;
		584	else
		585	{
		586	w_->pending = ++pendingcnt [pri];
		587	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		588	pendings [pri][w_->pending - 1].w = w_;
		589	pendings [pri][w_->pending - 1].events = revents;
		590	}
		591	}
		592
		593	void inline_speed
		594	queue_events (EV_P_ W *events, int eventcnt, int type)
		595	{
		596	int i;
		597
		598	for (i = 0; i < eventcnt; ++i)
		599	ev_feed_event (EV_A_ events [i], type);
		600	}
		601
		602	/*****************************************************************************/
		603
		604	void inline_size
		605	anfds_init (ANFD *base, int count)
		606	{
		607	while (count--)
		608	{
		609	base->head = 0;
		610	base->events = EV_NONE;
		611	base->reify = 0;
		612
		613	++base;
		614	}
		615	}
		616
		617	void inline_speed
		618	fd_event (EV_P_ int fd, int revents)
		619	{
		620	ANFD *anfd = anfds + fd;
		621	ev_io *w;
		622
		623	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		624	{
		625	int ev = w->events & revents;
		626
		627	if (ev)
		628	ev_feed_event (EV_A_ (W)w, ev);
		629	}
		630	}
		631
		632	void
		633	ev_feed_fd_event (EV_P_ int fd, int revents)
		634	{
		635	if (fd >= 0 && fd < anfdmax)
		636	fd_event (EV_A_ fd, revents);
		637	}
		638
		639	void inline_size
		640	fd_reify (EV_P)
		641	{
		642	int i;
		643
		644	for (i = 0; i < fdchangecnt; ++i)
		645	{
		646	int fd = fdchanges [i];
		647	ANFD *anfd = anfds + fd;
		648	ev_io *w;
		649
		650	unsigned char events = 0;
		651
		652	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		653	events |= (unsigned char)w->events;
		654
		655	#if EV_SELECT_IS_WINSOCKET
		656	if (events)
		657	{
		658	unsigned long argp;
		659	#ifdef EV_FD_TO_WIN32_HANDLE
		660	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		661	#else
		662	anfd->handle = _get_osfhandle (fd);
		663	#endif
		664	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		665	}
		666	#endif
		667
		668	{
		669	unsigned char o_events = anfd->events;
		670	unsigned char o_reify = anfd->reify;
		671
		672	anfd->reify = 0;
		673	anfd->events = events;
		674
		675	if (o_events != events || o_reify & EV_IOFDSET)
		676	backend_modify (EV_A_ fd, o_events, events);
		677	}
		678	}
		679
		680	fdchangecnt = 0;
		681	}
		682
		683	void inline_size
		684	fd_change (EV_P_ int fd, int flags)
		685	{
		686	unsigned char reify = anfds [fd].reify;
		687	anfds [fd].reify |= flags;
		688
		689	if (expect_true (!reify))
		690	{
		691	++fdchangecnt;
		692	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		693	fdchanges [fdchangecnt - 1] = fd;
		694	}
		695	}
		696
		697	void inline_speed
		698	fd_kill (EV_P_ int fd)
		699	{
		700	ev_io *w;
		701
		702	while ((w = (ev_io *)anfds [fd].head))
		703	{
		704	ev_io_stop (EV_A_ w);
		705	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		706	}
		707	}
		708
		709	int inline_size
		710	fd_valid (int fd)
		711	{
		712	#ifdef _WIN32
		713	return _get_osfhandle (fd) != -1;
		714	#else
		715	return fcntl (fd, F_GETFD) != -1;
		716	#endif
		717	}
		718
		719	/* called on EBADF to verify fds */
		720	static void noinline
		721	fd_ebadf (EV_P)
		722	{
		723	int fd;
		724
		725	for (fd = 0; fd < anfdmax; ++fd)
		726	if (anfds [fd].events)
		727	if (!fd_valid (fd) == -1 && errno == EBADF)
		728	fd_kill (EV_A_ fd);
		729	}
		730
		731	/* called on ENOMEM in select/poll to kill some fds and retry */
		732	static void noinline
		733	fd_enomem (EV_P)
		734	{
		735	int fd;
		736
		737	for (fd = anfdmax; fd--; )
		738	if (anfds [fd].events)
		739	{
		740	fd_kill (EV_A_ fd);
		741	return;
		742	}
		743	}
		744
		745	/* usually called after fork if backend needs to re-arm all fds from scratch */
		746	static void noinline
		747	fd_rearm_all (EV_P)
		748	{
		749	int fd;
		750
		751	for (fd = 0; fd < anfdmax; ++fd)
		752	if (anfds [fd].events)
		753	{
		754	anfds [fd].events = 0;
		755	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		756	}
		757	}
		758
		759	/*****************************************************************************/
		760
		761	/* towards the root */
		762	void inline_speed
		763	upheap (WT *heap, int k)
		764	{
		765	WT w = heap [k];
		766
		767	for (;;)
		768	{
		769	int p = k >> 1;
		770
		771	/* maybe we could use a dummy element at heap [0]? */
		772	if (!p || heap [p]->at <= w->at)
		773	break;
		774
		775	heap [k] = heap [p];
		776	((W)heap [k])->active = k;
		777	k = p;
		778	}
		779
		780	heap [k] = w;
		781	((W)heap [k])->active = k;
		782	}
		783
		784	/* away from the root */
		785	void inline_speed
		786	downheap (WT *heap, int N, int k)
		787	{
		788	WT w = heap [k];
		789
		790	for (;;)
		791	{
		792	int c = k << 1;
		793
		794	if (c > N)
		795	break;
		796
		797	c += c < N && heap [c]->at > heap [c + 1]->at
		798	? 1 : 0;
		799
		800	if (w->at <= heap [c]->at)
		801	break;
		802
		803	heap [k] = heap [c];
		804	((W)heap [k])->active = k;
		805
		806	k = c;
		807	}
		808
		809	heap [k] = w;
		810	((W)heap [k])->active = k;
		811	}
		812
		813	void inline_size
		814	adjustheap (WT *heap, int N, int k)
		815	{
		816	upheap (heap, k);
		817	downheap (heap, N, k);
		818	}
		819
		820	/*****************************************************************************/
		821
108	typedef struct	822	typedef struct
109	{	823	{
110	struct ev_io *head;	824	WL head;
111	unsigned char wev, rev; /* want, received event set */	825	EV_ATOMIC_T gotsig;
112	} ANFD;
113
114	static ANFD *anfds;
115	static int anfdmax;
116
117	static int *fdchanges;
118	static int fdchangemax, fdchangecnt;
119
120	static void
121	anfds_init (ANFD *base, int count)
122	{
123	while (count--)
124	{
125	base->head = 0;
126	base->wev = base->rev = EV_NONE;
127	++base;
128	}
129	}
130
131	typedef struct
132	{
133	W w;
134	int events;
135	} ANPENDING;
136
137	static ANPENDING *pendings;
138	static int pendingmax, pendingcnt;
139
140	static void
141	event (W w, int events)
142	{
143	w->pending = ++pendingcnt;
144	array_needsize (pendings, pendingmax, pendingcnt, );
145	pendings [pendingcnt - 1].w = w;
146	pendings [pendingcnt - 1].events = events;
147	}
148
149	static void
150	fd_event (int fd, int events)
151	{
152	ANFD *anfd = anfds + fd;
153	struct ev_io *w;
154
155	for (w = anfd->head; w; w = w->next)
156	{
157	int ev = w->events & events;
158
159	if (ev)
160	event ((W)w, ev);
161	}
162	}
163
164	static void
165	queue_events (W *events, int eventcnt, int type)
166	{
167	int i;
168
169	for (i = 0; i < eventcnt; ++i)
170	event (events [i], type);
171	}
172
173	/*****************************************************************************/
174
175	static struct ev_timer **timers;
176	static int timermax, timercnt;
177
178	static struct ev_periodic **periodics;
179	static int periodicmax, periodiccnt;
180
181	static void
182	upheap (WT *timers, int k)
183	{
184	WT w = timers [k];
185
186	while (k && timers [k >> 1]->at > w->at)
187	{
188	timers [k] = timers [k >> 1];
189	timers [k]->active = k + 1;
190	k >>= 1;
191	}
192
193	timers [k] = w;
194	timers [k]->active = k + 1;
195
196	}
197
198	static void
199	downheap (WT *timers, int N, int k)
200	{
201	WT w = timers [k];
202
203	while (k < (N >> 1))
204	{
205	int j = k << 1;
206
207	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
208	++j;
209
210	if (w->at <= timers [j]->at)
211	break;
212
213	timers [k] = timers [j];
214	timers [k]->active = k + 1;
215	k = j;
216	}
217
218	timers [k] = w;
219	timers [k]->active = k + 1;
220	}
221
222	/*****************************************************************************/
223
224	typedef struct
225	{
226	struct ev_signal *head;
227	sig_atomic_t gotsig;
228	} ANSIG;	826	} ANSIG;
229		827
230	static ANSIG *signals;	828	static ANSIG *signals;
231	static int signalmax;	829	static int signalmax;
232		830
233	static int sigpipe [2];	831	static EV_ATOMIC_T gotsig;
234	static sig_atomic_t gotsig;
235	static struct ev_io sigev;
236		832
237	static void	833	void inline_size
238	signals_init (ANSIG *base, int count)	834	signals_init (ANSIG *base, int count)
239	{	835	{
240	while (count--)	836	while (count--)
241	{	837	{
242	base->head = 0;	838	base->head = 0;
243	base->gotsig = 0;	839	base->gotsig = 0;
		840
244	++base;	841	++base;
245	}	842	}
246	}	843	}
247		844
		845	/*****************************************************************************/
		846
		847	void inline_speed
		848	fd_intern (int fd)
		849	{
		850	#ifdef _WIN32
		851	int arg = 1;
		852	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		853	#else
		854	fcntl (fd, F_SETFD, FD_CLOEXEC);
		855	fcntl (fd, F_SETFL, O_NONBLOCK);
		856	#endif
		857	}
		858
		859	static void noinline
		860	evpipe_init (EV_P)
		861	{
		862	if (!ev_is_active (&pipeev))
		863	{
		864	#if EV_USE_EVENTFD
		865	if ((evfd = eventfd (0, 0)) >= 0)
		866	{
		867	evpipe [0] = -1;
		868	fd_intern (evfd);
		869	ev_io_set (&pipeev, evfd, EV_READ);
		870	}
		871	else
		872	#endif
		873	{
		874	while (pipe (evpipe))
		875	syserr ("(libev) error creating signal/async pipe");
		876
		877	fd_intern (evpipe [0]);
		878	fd_intern (evpipe [1]);
		879	ev_io_set (&pipeev, evpipe [0], EV_READ);
		880	}
		881
		882	ev_io_start (EV_A_ &pipeev);
		883	ev_unref (EV_A); /* watcher should not keep loop alive */
		884	}
		885	}
		886
		887	void inline_size
		888	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		889	{
		890	if (!*flag)
		891	{
		892	int old_errno = errno; /* save errno because write might clobber it */
		893
		894	*flag = 1;
		895
		896	#if EV_USE_EVENTFD
		897	if (evfd >= 0)
		898	{
		899	uint64_t counter = 1;
		900	write (evfd, &counter, sizeof (uint64_t));
		901	}
		902	else
		903	#endif
		904	write (evpipe [1], &old_errno, 1);
		905
		906	errno = old_errno;
		907	}
		908	}
		909
248	static void	910	static void
		911	pipecb (EV_P_ ev_io *iow, int revents)
		912	{
		913	#if EV_USE_EVENTFD
		914	if (evfd >= 0)
		915	{
		916	uint64_t counter = 1;
		917	read (evfd, &counter, sizeof (uint64_t));
		918	}
		919	else
		920	#endif
		921	{
		922	char dummy;
		923	read (evpipe [0], &dummy, 1);
		924	}
		925
		926	if (gotsig && ev_is_default_loop (EV_A))
		927	{
		928	int signum;
		929	gotsig = 0;
		930
		931	for (signum = signalmax; signum--; )
		932	if (signals [signum].gotsig)
		933	ev_feed_signal_event (EV_A_ signum + 1);
		934	}
		935
		936	#if EV_ASYNC_ENABLE
		937	if (gotasync)
		938	{
		939	int i;
		940	gotasync = 0;
		941
		942	for (i = asynccnt; i--; )
		943	if (asyncs [i]->sent)
		944	{
		945	asyncs [i]->sent = 0;
		946	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		947	}
		948	}
		949	#endif
		950	}
		951
		952	/*****************************************************************************/
		953
		954	static void
249	sighandler (int signum)	955	ev_sighandler (int signum)
250	{	956	{
		957	#if EV_MULTIPLICITY
		958	struct ev_loop *loop = &default_loop_struct;
		959	#endif
		960
		961	#if _WIN32
		962	signal (signum, ev_sighandler);
		963	#endif
		964
251	signals [signum - 1].gotsig = 1;	965	signals [signum - 1].gotsig = 1;
		966	evpipe_write (EV_A_ &gotsig);
		967	}
252		968
253	if (!gotsig)	969	void noinline
		970	ev_feed_signal_event (EV_P_ int signum)
		971	{
		972	WL w;
		973
		974	#if EV_MULTIPLICITY
		975	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		976	#endif
		977
		978	--signum;
		979
		980	if (signum < 0 || signum >= signalmax)
		981	return;
		982
		983	signals [signum].gotsig = 0;
		984
		985	for (w = signals [signum].head; w; w = w->next)
		986	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		987	}
		988
		989	/*****************************************************************************/
		990
		991	static WL childs [EV_PID_HASHSIZE];
		992
		993	#ifndef _WIN32
		994
		995	static ev_signal childev;
		996
		997	#ifndef WIFCONTINUED
		998	# define WIFCONTINUED(status) 0
		999	#endif
		1000
		1001	void inline_speed
		1002	child_reap (EV_P_ int chain, int pid, int status)
		1003	{
		1004	ev_child *w;
		1005	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1006
		1007	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1008	{
		1009	if ((w->pid == pid || !w->pid)
		1010	&& (!traced || (w->flags & 1)))
		1011	{
		1012	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1013	w->rpid = pid;
		1014	w->rstatus = status;
		1015	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1016	}
		1017	}
		1018	}
		1019
		1020	#ifndef WCONTINUED
		1021	# define WCONTINUED 0
		1022	#endif
		1023
		1024	static void
		1025	childcb (EV_P_ ev_signal *sw, int revents)
		1026	{
		1027	int pid, status;
		1028
		1029	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1030	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		1031	if (!WCONTINUED
		1032	|| errno != EINVAL
		1033	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1034	return;
		1035
		1036	/* make sure we are called again until all children have been reaped */
		1037	/* we need to do it this way so that the callback gets called before we continue */
		1038	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1039
		1040	child_reap (EV_A_ pid, pid, status);
		1041	if (EV_PID_HASHSIZE > 1)
		1042	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1043	}
		1044
		1045	#endif
		1046
		1047	/*****************************************************************************/
		1048
		1049	#if EV_USE_PORT
		1050	# include "ev_port.c"
		1051	#endif
		1052	#if EV_USE_KQUEUE
		1053	# include "ev_kqueue.c"
		1054	#endif
		1055	#if EV_USE_EPOLL
		1056	# include "ev_epoll.c"
		1057	#endif
		1058	#if EV_USE_POLL
		1059	# include "ev_poll.c"
		1060	#endif
		1061	#if EV_USE_SELECT
		1062	# include "ev_select.c"
		1063	#endif
		1064
		1065	int
		1066	ev_version_major (void)
		1067	{
		1068	return EV_VERSION_MAJOR;
		1069	}
		1070
		1071	int
		1072	ev_version_minor (void)
		1073	{
		1074	return EV_VERSION_MINOR;
		1075	}
		1076
		1077	/* return true if we are running with elevated privileges and should ignore env variables */
		1078	int inline_size
		1079	enable_secure (void)
		1080	{
		1081	#ifdef _WIN32
		1082	return 0;
		1083	#else
		1084	return getuid () != geteuid ()
		1085	|| getgid () != getegid ();
		1086	#endif
		1087	}
		1088
		1089	unsigned int
		1090	ev_supported_backends (void)
		1091	{
		1092	unsigned int flags = 0;
		1093
		1094	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1095	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1096	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1097	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1098	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1099
		1100	return flags;
		1101	}
		1102
		1103	unsigned int
		1104	ev_recommended_backends (void)
		1105	{
		1106	unsigned int flags = ev_supported_backends ();
		1107
		1108	#ifndef __NetBSD__
		1109	/* kqueue is borked on everything but netbsd apparently */
		1110	/* it usually doesn't work correctly on anything but sockets and pipes */
		1111	flags &= ~EVBACKEND_KQUEUE;
		1112	#endif
		1113	#ifdef __APPLE__
		1114	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1115	flags &= ~EVBACKEND_POLL;
		1116	#endif
		1117
		1118	return flags;
		1119	}
		1120
		1121	unsigned int
		1122	ev_embeddable_backends (void)
		1123	{
		1124	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1125
		1126	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1127	/* please fix it and tell me how to detect the fix */
		1128	flags &= ~EVBACKEND_EPOLL;
		1129
		1130	return flags;
		1131	}
		1132
		1133	unsigned int
		1134	ev_backend (EV_P)
		1135	{
		1136	return backend;
		1137	}
		1138
		1139	unsigned int
		1140	ev_loop_count (EV_P)
		1141	{
		1142	return loop_count;
		1143	}
		1144
		1145	void
		1146	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1147	{
		1148	io_blocktime = interval;
		1149	}
		1150
		1151	void
		1152	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1153	{
		1154	timeout_blocktime = interval;
		1155	}
		1156
		1157	static void noinline
		1158	loop_init (EV_P_ unsigned int flags)
		1159	{
		1160	if (!backend)
		1161	{
		1162	#if EV_USE_MONOTONIC
254	{	1163	{
		1164	struct timespec ts;
		1165	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1166	have_monotonic = 1;
		1167	}
		1168	#endif
		1169
		1170	ev_rt_now = ev_time ();
		1171	mn_now = get_clock ();
		1172	now_floor = mn_now;
		1173	rtmn_diff = ev_rt_now - mn_now;
		1174
		1175	io_blocktime = 0.;
		1176	timeout_blocktime = 0.;
		1177	backend = 0;
		1178	backend_fd = -1;
		1179	gotasync = 0;
		1180	#if EV_USE_INOTIFY
		1181	fs_fd = -2;
		1182	#endif
		1183
		1184	/* pid check not overridable via env */
		1185	#ifndef _WIN32
		1186	if (flags & EVFLAG_FORKCHECK)
		1187	curpid = getpid ();
		1188	#endif
		1189
		1190	if (!(flags & EVFLAG_NOENV)
		1191	&& !enable_secure ()
		1192	&& getenv ("LIBEV_FLAGS"))
		1193	flags = atoi (getenv ("LIBEV_FLAGS"));
		1194
		1195	if (!(flags & 0x0000ffffU))
		1196	flags |= ev_recommended_backends ();
		1197
		1198	#if EV_USE_PORT
		1199	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1200	#endif
		1201	#if EV_USE_KQUEUE
		1202	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1203	#endif
		1204	#if EV_USE_EPOLL
		1205	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1206	#endif
		1207	#if EV_USE_POLL
		1208	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1209	#endif
		1210	#if EV_USE_SELECT
		1211	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1212	#endif
		1213
		1214	ev_init (&pipeev, pipecb);
		1215	ev_set_priority (&pipeev, EV_MAXPRI);
		1216	}
		1217	}
		1218
		1219	static void noinline
		1220	loop_destroy (EV_P)
		1221	{
		1222	int i;
		1223
		1224	if (ev_is_active (&pipeev))
		1225	{
		1226	ev_ref (EV_A); /* signal watcher */
		1227	ev_io_stop (EV_A_ &pipeev);
		1228
		1229	#if EV_USE_EVENTFD
		1230	if (evfd >= 0)
		1231	close (evfd);
		1232	#endif
		1233
		1234	if (evpipe [0] >= 0)
		1235	{
		1236	close (evpipe [0]);
		1237	close (evpipe [1]);
		1238	}
		1239	}
		1240
		1241	#if EV_USE_INOTIFY
		1242	if (fs_fd >= 0)
		1243	close (fs_fd);
		1244	#endif
		1245
		1246	if (backend_fd >= 0)
		1247	close (backend_fd);
		1248
		1249	#if EV_USE_PORT
		1250	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1251	#endif
		1252	#if EV_USE_KQUEUE
		1253	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1254	#endif
		1255	#if EV_USE_EPOLL
		1256	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1257	#endif
		1258	#if EV_USE_POLL
		1259	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1260	#endif
		1261	#if EV_USE_SELECT
		1262	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1263	#endif
		1264
		1265	for (i = NUMPRI; i--; )
		1266	{
		1267	array_free (pending, [i]);
		1268	#if EV_IDLE_ENABLE
		1269	array_free (idle, [i]);
		1270	#endif
		1271	}
		1272
		1273	ev_free (anfds); anfdmax = 0;
		1274
		1275	/* have to use the microsoft-never-gets-it-right macro */
		1276	array_free (fdchange, EMPTY);
		1277	array_free (timer, EMPTY);
		1278	#if EV_PERIODIC_ENABLE
		1279	array_free (periodic, EMPTY);
		1280	#endif
		1281	#if EV_FORK_ENABLE
		1282	array_free (fork, EMPTY);
		1283	#endif
		1284	array_free (prepare, EMPTY);
		1285	array_free (check, EMPTY);
		1286	#if EV_ASYNC_ENABLE
		1287	array_free (async, EMPTY);
		1288	#endif
		1289
		1290	backend = 0;
		1291	}
		1292
		1293	#if EV_USE_INOTIFY
		1294	void inline_size infy_fork (EV_P);
		1295	#endif
		1296
		1297	void inline_size
		1298	loop_fork (EV_P)
		1299	{
		1300	#if EV_USE_PORT
		1301	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1302	#endif
		1303	#if EV_USE_KQUEUE
		1304	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1305	#endif
		1306	#if EV_USE_EPOLL
		1307	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1308	#endif
		1309	#if EV_USE_INOTIFY
		1310	infy_fork (EV_A);
		1311	#endif
		1312
		1313	if (ev_is_active (&pipeev))
		1314	{
		1315	/* this "locks" the handlers against writing to the pipe */
		1316	/* while we modify the fd vars */
255	gotsig = 1;	1317	gotsig = 1;
256	write (sigpipe [1], &gotsig, 1);	1318	#if EV_ASYNC_ENABLE
		1319	gotasync = 1;
		1320	#endif
		1321
		1322	ev_ref (EV_A);
		1323	ev_io_stop (EV_A_ &pipeev);
		1324
		1325	#if EV_USE_EVENTFD
		1326	if (evfd >= 0)
		1327	close (evfd);
		1328	#endif
		1329
		1330	if (evpipe [0] >= 0)
		1331	{
		1332	close (evpipe [0]);
		1333	close (evpipe [1]);
		1334	}
		1335
		1336	evpipe_init (EV_A);
		1337	/* now iterate over everything, in case we missed something */
		1338	pipecb (EV_A_ &pipeev, EV_READ);
		1339	}
		1340
		1341	postfork = 0;
		1342	}
		1343
		1344	#if EV_MULTIPLICITY
		1345	struct ev_loop *
		1346	ev_loop_new (unsigned int flags)
		1347	{
		1348	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1349
		1350	memset (loop, 0, sizeof (struct ev_loop));
		1351
		1352	loop_init (EV_A_ flags);
		1353
		1354	if (ev_backend (EV_A))
		1355	return loop;
		1356
		1357	return 0;
		1358	}
		1359
		1360	void
		1361	ev_loop_destroy (EV_P)
		1362	{
		1363	loop_destroy (EV_A);
		1364	ev_free (loop);
		1365	}
		1366
		1367	void
		1368	ev_loop_fork (EV_P)
		1369	{
		1370	postfork = 1; /* must be in line with ev_default_fork */
		1371	}
		1372
		1373	#endif
		1374
		1375	#if EV_MULTIPLICITY
		1376	struct ev_loop *
		1377	ev_default_loop_init (unsigned int flags)
		1378	#else
		1379	int
		1380	ev_default_loop (unsigned int flags)
		1381	#endif
		1382	{
		1383	if (!ev_default_loop_ptr)
257	}	1384	{
258	}	1385	#if EV_MULTIPLICITY
		1386	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1387	#else
		1388	ev_default_loop_ptr = 1;
		1389	#endif
259		1390
260	static void	1391	loop_init (EV_A_ flags);
261	sigcb (struct ev_io *iow, int revents)	1392
		1393	if (ev_backend (EV_A))
		1394	{
		1395	#ifndef _WIN32
		1396	ev_signal_init (&childev, childcb, SIGCHLD);
		1397	ev_set_priority (&childev, EV_MAXPRI);
		1398	ev_signal_start (EV_A_ &childev);
		1399	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1400	#endif
		1401	}
		1402	else
		1403	ev_default_loop_ptr = 0;
		1404	}
		1405
		1406	return ev_default_loop_ptr;
		1407	}
		1408
		1409	void
		1410	ev_default_destroy (void)
262	{	1411	{
263	struct ev_signal *w;	1412	#if EV_MULTIPLICITY
		1413	struct ev_loop *loop = ev_default_loop_ptr;
		1414	#endif
		1415
		1416	#ifndef _WIN32
		1417	ev_ref (EV_A); /* child watcher */
		1418	ev_signal_stop (EV_A_ &childev);
		1419	#endif
		1420
		1421	loop_destroy (EV_A);
		1422	}
		1423
		1424	void
		1425	ev_default_fork (void)
		1426	{
		1427	#if EV_MULTIPLICITY
		1428	struct ev_loop *loop = ev_default_loop_ptr;
		1429	#endif
		1430
		1431	if (backend)
		1432	postfork = 1; /* must be in line with ev_loop_fork */
		1433	}
		1434
		1435	/*****************************************************************************/
		1436
		1437	void
		1438	ev_invoke (EV_P_ void *w, int revents)
		1439	{
		1440	EV_CB_INVOKE ((W)w, revents);
		1441	}
		1442
		1443	void inline_speed
		1444	call_pending (EV_P)
		1445	{
264	int sig;	1446	int pri;
265		1447
266	gotsig = 0;	1448	for (pri = NUMPRI; pri--; )
267	read (sigpipe [0], &revents, 1);	1449	while (pendingcnt [pri])
268
269	for (sig = signalmax; sig--; )
270	if (signals [sig].gotsig)
271	{	1450	{
272	signals [sig].gotsig = 0;	1451	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
273		1452
274	for (w = signals [sig].head; w; w = w->next)	1453	if (expect_true (p->w))
275	event ((W)w, EV_SIGNAL);	1454	{
		1455	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1456
		1457	p->w->pending = 0;
		1458	EV_CB_INVOKE (p->w, p->events);
		1459	}
276	}	1460	}
277	}	1461	}
278		1462
279	static void	1463	void inline_size
280	siginit (void)
281	{
282	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284
285	/* rather than sort out wether we really need nb, set it */
286	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
288
289	evio_set (&sigev, sigpipe [0], EV_READ);
290	evio_start (&sigev);
291	}
292
293	/*****************************************************************************/
294
295	static struct ev_idle **idles;
296	static int idlemax, idlecnt;
297
298	static struct ev_check **checks;
299	static int checkmax, checkcnt;
300
301	/*****************************************************************************/
302
303	#if HAVE_EPOLL
304	# include "ev_epoll.c"
305	#endif
306	#if HAVE_SELECT
307	# include "ev_select.c"
308	#endif
309
310	int ev_init (int flags)
311	{
312	#if HAVE_MONOTONIC
313	{
314	struct timespec ts;
315	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316	have_monotonic = 1;
317	}
318	#endif
319
320	ev_now = ev_time ();
321	now = get_clock ();
322	diff = ev_now - now;
323
324	if (pipe (sigpipe))
325	return 0;
326
327	ev_method = EVMETHOD_NONE;
328	#if HAVE_EPOLL
329	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
330	#endif
331	#if HAVE_SELECT
332	if (ev_method == EVMETHOD_NONE) select_init (flags);
333	#endif
334
335	if (ev_method)
336	{
337	evw_init (&sigev, sigcb);
338	siginit ();
339	}
340
341	return ev_method;
342	}
343
344	/*****************************************************************************/
345
346	void ev_prefork (void)
347	{
348	/* nop */
349	}
350
351	void ev_postfork_parent (void)
352	{
353	/* nop */
354	}
355
356	void ev_postfork_child (void)
357	{
358	#if HAVE_EPOLL
359	if (ev_method == EVMETHOD_EPOLL)
360	epoll_postfork_child ();
361	#endif
362
363	evio_stop (&sigev);
364	close (sigpipe [0]);
365	close (sigpipe [1]);
366	pipe (sigpipe);
367	siginit ();
368	}
369
370	/*****************************************************************************/
371
372	static void
373	fd_reify (void)
374	{
375	int i;
376
377	for (i = 0; i < fdchangecnt; ++i)
378	{
379	int fd = fdchanges [i];
380	ANFD *anfd = anfds + fd;
381	struct ev_io *w;
382
383	int wev = 0;
384
385	for (w = anfd->head; w; w = w->next)
386	wev |= w->events;
387
388	if (anfd->wev != wev)
389	{
390	method_modify (fd, anfd->wev, wev);
391	anfd->wev = wev;
392	}
393	}
394
395	fdchangecnt = 0;
396	}
397
398	static void
399	call_pending ()
400	{
401	int i;
402
403	for (i = 0; i < pendingcnt; ++i)
404	{
405	ANPENDING *p = pendings + i;
406
407	if (p->w)
408	{
409	p->w->pending = 0;
410	p->w->cb (p->w, p->events);
411	}
412	}
413
414	pendingcnt = 0;
415	}
416
417	static void
418	timers_reify ()	1464	timers_reify (EV_P)
419	{	1465	{
420	while (timercnt && timers [0]->at <= now)	1466	while (timercnt && ev_at (timers [1]) <= mn_now)
421	{	1467	{
422	struct ev_timer *w = timers [0];	1468	ev_timer *w = (ev_timer *)timers [1];
		1469
		1470	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
423		1471
424	/* first reschedule or stop timer */	1472	/* first reschedule or stop timer */
425	if (w->repeat)	1473	if (w->repeat)
426	{	1474	{
427	w->at = now + w->repeat;	1475	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
428	assert (("timer timeout in the past, negative repeat?", w->at > now));	1476
		1477	ev_at (w) += w->repeat;
		1478	if (ev_at (w) < mn_now)
		1479	ev_at (w) = mn_now;
		1480
429	downheap ((WT *)timers, timercnt, 0);	1481	downheap (timers, timercnt, 1);
430	}	1482	}
431	else	1483	else
432	evtimer_stop (w); /* nonrepeating: stop timer */	1484	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433		1485
434	event ((W)w, EV_TIMEOUT);	1486	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
435	}	1487	}
436	}	1488	}
437		1489
438	static void	1490	#if EV_PERIODIC_ENABLE
		1491	void inline_size
439	periodics_reify ()	1492	periodics_reify (EV_P)
440	{	1493	{
441	while (periodiccnt && periodics [0]->at <= ev_now)	1494	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
442	{	1495	{
443	struct ev_periodic *w = periodics [0];	1496	ev_periodic *w = (ev_periodic *)periodics [1];
		1497
		1498	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
444		1499
445	/* first reschedule or stop timer */	1500	/* first reschedule or stop timer */
446	if (w->interval)	1501	if (w->reschedule_cb)
447	{	1502	{
448	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1503	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
449	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1504	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
450	downheap ((WT *)periodics, periodiccnt, 0);	1505	downheap (periodics, periodiccnt, 1);
		1506	}
		1507	else if (w->interval)
		1508	{
		1509	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1510	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1511	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1512	downheap (periodics, periodiccnt, 1);
451	}	1513	}
452	else	1514	else
453	evperiodic_stop (w); /* nonrepeating: stop timer */	1515	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454		1516
455	event ((W)w, EV_TIMEOUT);	1517	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
456	}	1518	}
457	}	1519	}
458		1520
459	static void	1521	static void noinline
460	time_jump (ev_tstamp diff)	1522	periodics_reschedule (EV_P)
461	{	1523	{
462	int i;	1524	int i;
463		1525
464	/* adjust periodics */	1526	/* adjust periodics after time jump */
465	for (i = 0; i < periodiccnt; ++i)	1527	for (i = 0; i < periodiccnt; ++i)
466	{	1528	{
467	struct ev_periodic *w = periodics [i];	1529	ev_periodic *w = (ev_periodic *)periodics [i];
468		1530
		1531	if (w->reschedule_cb)
		1532	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
469	if (w->interval)	1533	else if (w->interval)
		1534	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1535	}
		1536
		1537	/* now rebuild the heap */
		1538	for (i = periodiccnt >> 1; i--; )
		1539	downheap (periodics, periodiccnt, i);
		1540	}
		1541	#endif
		1542
		1543	#if EV_IDLE_ENABLE
		1544	void inline_size
		1545	idle_reify (EV_P)
		1546	{
		1547	if (expect_false (idleall))
		1548	{
		1549	int pri;
		1550
		1551	for (pri = NUMPRI; pri--; )
470	{	1552	{
471	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1553	if (pendingcnt [pri])
		1554	break;
472		1555
473	if (fabs (diff) >= 1e-4)	1556	if (idlecnt [pri])
474	{	1557	{
475	evperiodic_stop (w);	1558	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
476	evperiodic_start (w);	1559	break;
477
478	i = 0; /* restart loop, inefficient, but time jumps should be rare */
479	}	1560	}
480	}	1561	}
481	}	1562	}
482
483	/* adjust timers. this is easy, as the offset is the same for all */
484	for (i = 0; i < timercnt; ++i)
485	timers [i]->at += diff;
486	}	1563	}
		1564	#endif
487		1565
488	static void	1566	void inline_speed
489	time_update ()	1567	time_update (EV_P_ ev_tstamp max_block)
490	{	1568	{
491	int i;	1569	int i;
492		1570
493	ev_now = ev_time ();	1571	#if EV_USE_MONOTONIC
494
495	if (have_monotonic)	1572	if (expect_true (have_monotonic))
496	{	1573	{
497	ev_tstamp odiff = diff;	1574	ev_tstamp odiff = rtmn_diff;
498		1575
499	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1576	mn_now = get_clock ();
		1577
		1578	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1579	/* interpolate in the meantime */
		1580	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
500	{	1581	{
501	now = get_clock ();	1582	ev_rt_now = rtmn_diff + mn_now;
		1583	return;
		1584	}
		1585
		1586	now_floor = mn_now;
		1587	ev_rt_now = ev_time ();
		1588
		1589	/* loop a few times, before making important decisions.
		1590	* on the choice of "4": one iteration isn't enough,
		1591	* in case we get preempted during the calls to
		1592	* ev_time and get_clock. a second call is almost guaranteed
		1593	* to succeed in that case, though. and looping a few more times
		1594	* doesn't hurt either as we only do this on time-jumps or
		1595	* in the unlikely event of having been preempted here.
		1596	*/
		1597	for (i = 4; --i; )
		1598	{
502	diff = ev_now - now;	1599	rtmn_diff = ev_rt_now - mn_now;
503		1600
504	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1601	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
505	return; /* all is well */	1602	return; /* all is well */
506		1603
507	ev_now = ev_time ();	1604	ev_rt_now = ev_time ();
		1605	mn_now = get_clock ();
		1606	now_floor = mn_now;
508	}	1607	}
509		1608
510	time_jump (diff - odiff);	1609	# if EV_PERIODIC_ENABLE
		1610	periodics_reschedule (EV_A);
		1611	# endif
		1612	/* no timer adjustment, as the monotonic clock doesn't jump */
		1613	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
511	}	1614	}
512	else	1615	else
		1616	#endif
513	{	1617	{
514	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1618	ev_rt_now = ev_time ();
515	time_jump (ev_now - now);
516		1619
		1620	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1621	{
		1622	#if EV_PERIODIC_ENABLE
		1623	periodics_reschedule (EV_A);
		1624	#endif
		1625	/* adjust timers. this is easy, as the offset is the same for all of them */
		1626	for (i = 1; i <= timercnt; ++i)
		1627	ev_at (timers [i]) += ev_rt_now - mn_now;
		1628	}
		1629
517	now = ev_now;	1630	mn_now = ev_rt_now;
518	}
519	}
520
521	int ev_loop_done;
522
523	void ev_loop (int flags)
524	{
525	double block;
526	ev_loop_done = flags & EVLOOP_ONESHOT;
527
528	if (checkcnt)
529	{	1631	}
530	queue_events ((W *)checks, checkcnt, EV_CHECK);	1632	}
531	call_pending ();	1633
532	}	1634	void
		1635	ev_ref (EV_P)
		1636	{
		1637	++activecnt;
		1638	}
		1639
		1640	void
		1641	ev_unref (EV_P)
		1642	{
		1643	--activecnt;
		1644	}
		1645
		1646	static int loop_done;
		1647
		1648	void
		1649	ev_loop (EV_P_ int flags)
		1650	{
		1651	loop_done = EVUNLOOP_CANCEL;
		1652
		1653	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
533		1654
534	do	1655	do
535	{	1656	{
		1657	#ifndef _WIN32
		1658	if (expect_false (curpid)) /* penalise the forking check even more */
		1659	if (expect_false (getpid () != curpid))
		1660	{
		1661	curpid = getpid ();
		1662	postfork = 1;
		1663	}
		1664	#endif
		1665
		1666	#if EV_FORK_ENABLE
		1667	/* we might have forked, so queue fork handlers */
		1668	if (expect_false (postfork))
		1669	if (forkcnt)
		1670	{
		1671	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1672	call_pending (EV_A);
		1673	}
		1674	#endif
		1675
		1676	/* queue prepare watchers (and execute them) */
		1677	if (expect_false (preparecnt))
		1678	{
		1679	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1680	call_pending (EV_A);
		1681	}
		1682
		1683	if (expect_false (!activecnt))
		1684	break;
		1685
		1686	/* we might have forked, so reify kernel state if necessary */
		1687	if (expect_false (postfork))
		1688	loop_fork (EV_A);
		1689
536	/* update fd-related kernel structures */	1690	/* update fd-related kernel structures */
537	fd_reify ();	1691	fd_reify (EV_A);
538		1692
539	/* calculate blocking time */	1693	/* calculate blocking time */
		1694	{
		1695	ev_tstamp waittime = 0.;
		1696	ev_tstamp sleeptime = 0.;
540		1697
541	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1698	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
542	ev_now = ev_time ();
543
544	if (flags & EVLOOP_NONBLOCK || idlecnt)
545	block = 0.;
546	else
547	{	1699	{
		1700	/* update time to cancel out callback processing overhead */
		1701	time_update (EV_A_ 1e100);
		1702
548	block = MAX_BLOCKTIME;	1703	waittime = MAX_BLOCKTIME;
549		1704
550	if (timercnt)	1705	if (timercnt)
551	{	1706	{
552	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	1707	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
553	if (block > to) block = to;	1708	if (waittime > to) waittime = to;
554	}	1709	}
555		1710
		1711	#if EV_PERIODIC_ENABLE
556	if (periodiccnt)	1712	if (periodiccnt)
557	{	1713	{
558	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1714	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
559	if (block > to) block = to;	1715	if (waittime > to) waittime = to;
560	}	1716	}
		1717	#endif
561		1718
562	if (block < 0.) block = 0.;	1719	if (expect_false (waittime < timeout_blocktime))
		1720	waittime = timeout_blocktime;
		1721
		1722	sleeptime = waittime - backend_fudge;
		1723
		1724	if (expect_true (sleeptime > io_blocktime))
		1725	sleeptime = io_blocktime;
		1726
		1727	if (sleeptime)
		1728	{
		1729	ev_sleep (sleeptime);
		1730	waittime -= sleeptime;
		1731	}
563	}	1732	}
564		1733
565	method_poll (block);	1734	++loop_count;
		1735	backend_poll (EV_A_ waittime);
566		1736
567	/* update ev_now, do magic */	1737	/* update ev_rt_now, do magic */
568	time_update ();	1738	time_update (EV_A_ waittime + sleeptime);
		1739	}
569		1740
570	/* queue pending timers and reschedule them */	1741	/* queue pending timers and reschedule them */
		1742	timers_reify (EV_A); /* relative timers called last */
		1743	#if EV_PERIODIC_ENABLE
571	periodics_reify (); /* absolute timers first */	1744	periodics_reify (EV_A); /* absolute timers called first */
572	timers_reify (); /* relative timers second */	1745	#endif
573		1746
		1747	#if EV_IDLE_ENABLE
574	/* queue idle watchers unless io or timers are pending */	1748	/* queue idle watchers unless other events are pending */
575	if (!pendingcnt)	1749	idle_reify (EV_A);
576	queue_events ((W *)idles, idlecnt, EV_IDLE);	1750	#endif
577		1751
578	/* queue check and possibly idle watchers */	1752	/* queue check watchers, to be executed first */
		1753	if (expect_false (checkcnt))
579	queue_events ((W *)checks, checkcnt, EV_CHECK);	1754	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580		1755
581	call_pending ();	1756	call_pending (EV_A);
582	}	1757	}
583	while (!ev_loop_done);	1758	while (expect_true (
		1759	activecnt
		1760	&& !loop_done
		1761	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1762	));
		1763
		1764	if (loop_done == EVUNLOOP_ONE)
		1765	loop_done = EVUNLOOP_CANCEL;
		1766	}
		1767
		1768	void
		1769	ev_unloop (EV_P_ int how)
		1770	{
		1771	loop_done = how;
584	}	1772	}
585		1773
586	/*****************************************************************************/	1774	/*****************************************************************************/
587		1775
588	static void	1776	void inline_size
589	wlist_add (WL *head, WL elem)	1777	wlist_add (WL *head, WL elem)
590	{	1778	{
591	elem->next = *head;	1779	elem->next = *head;
592	*head = elem;	1780	*head = elem;
593	}	1781	}
594		1782
595	static void	1783	void inline_size
596	wlist_del (WL *head, WL elem)	1784	wlist_del (WL *head, WL elem)
597	{	1785	{
598	while (*head)	1786	while (*head)
599	{	1787	{
600	if (*head == elem)	1788	if (*head == elem)
…		…
605		1793
606	head = &(*head)->next;	1794	head = &(*head)->next;
607	}	1795	}
608	}	1796	}
609		1797
610	static void	1798	void inline_speed
		1799	clear_pending (EV_P_ W w)
		1800	{
		1801	if (w->pending)
		1802	{
		1803	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1804	w->pending = 0;
		1805	}
		1806	}
		1807
		1808	int
		1809	ev_clear_pending (EV_P_ void *w)
		1810	{
		1811	W w_ = (W)w;
		1812	int pending = w_->pending;
		1813
		1814	if (expect_true (pending))
		1815	{
		1816	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1817	w_->pending = 0;
		1818	p->w = 0;
		1819	return p->events;
		1820	}
		1821	else
		1822	return 0;
		1823	}
		1824
		1825	void inline_size
		1826	pri_adjust (EV_P_ W w)
		1827	{
		1828	int pri = w->priority;
		1829	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1830	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1831	w->priority = pri;
		1832	}
		1833
		1834	void inline_speed
611	ev_start (W w, int active)	1835	ev_start (EV_P_ W w, int active)
612	{	1836	{
613	w->pending = 0;	1837	pri_adjust (EV_A_ w);
614	w->active = active;	1838	w->active = active;
		1839	ev_ref (EV_A);
615	}	1840	}
616		1841
617	static void	1842	void inline_size
618	ev_stop (W w)	1843	ev_stop (EV_P_ W w)
619	{	1844	{
620	if (w->pending)	1845	ev_unref (EV_A);
621	pendings [w->pending - 1].w = 0;
622
623	w->active = 0;	1846	w->active = 0;
624	}	1847	}
625		1848
626	/*****************************************************************************/	1849	/*****************************************************************************/
627		1850
628	void	1851	void noinline
629	evio_start (struct ev_io *w)	1852	ev_io_start (EV_P_ ev_io *w)
		1853	{
		1854	int fd = w->fd;
		1855
		1856	if (expect_false (ev_is_active (w)))
		1857	return;
		1858
		1859	assert (("ev_io_start called with negative fd", fd >= 0));
		1860
		1861	ev_start (EV_A_ (W)w, 1);
		1862	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1863	wlist_add (&anfds[fd].head, (WL)w);
		1864
		1865	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1866	w->events &= ~EV_IOFDSET;
		1867	}
		1868
		1869	void noinline
		1870	ev_io_stop (EV_P_ ev_io *w)
		1871	{
		1872	clear_pending (EV_A_ (W)w);
		1873	if (expect_false (!ev_is_active (w)))
		1874	return;
		1875
		1876	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1877
		1878	wlist_del (&anfds[w->fd].head, (WL)w);
		1879	ev_stop (EV_A_ (W)w);
		1880
		1881	fd_change (EV_A_ w->fd, 1);
		1882	}
		1883
		1884	void noinline
		1885	ev_timer_start (EV_P_ ev_timer *w)
		1886	{
		1887	if (expect_false (ev_is_active (w)))
		1888	return;
		1889
		1890	ev_at (w) += mn_now;
		1891
		1892	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1893
		1894	ev_start (EV_A_ (W)w, ++timercnt);
		1895	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
		1896	timers [timercnt] = (WT)w;
		1897	upheap (timers, timercnt);
		1898
		1899	/*assert (("internal timer heap corruption", timers [((W)w)->active] == w));*/
		1900	}
		1901
		1902	void noinline
		1903	ev_timer_stop (EV_P_ ev_timer *w)
		1904	{
		1905	clear_pending (EV_A_ (W)w);
		1906	if (expect_false (!ev_is_active (w)))
		1907	return;
		1908
		1909	assert (("internal timer heap corruption", timers [((W)w)->active] == (WT)w));
		1910
		1911	{
		1912	int active = ((W)w)->active;
		1913
		1914	if (expect_true (active < timercnt))
		1915	{
		1916	timers [active] = timers [timercnt];
		1917	adjustheap (timers, timercnt, active);
		1918	}
		1919
		1920	--timercnt;
		1921	}
		1922
		1923	ev_at (w) -= mn_now;
		1924
		1925	ev_stop (EV_A_ (W)w);
		1926	}
		1927
		1928	void noinline
		1929	ev_timer_again (EV_P_ ev_timer *w)
630	{	1930	{
631	if (ev_is_active (w))	1931	if (ev_is_active (w))
632	return;
633
634	int fd = w->fd;
635
636	ev_start ((W)w, 1);
637	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
638	wlist_add ((WL *)&anfds[fd].head, (WL)w);
639
640	++fdchangecnt;
641	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642	fdchanges [fdchangecnt - 1] = fd;
643	}
644
645	void
646	evio_stop (struct ev_io *w)
647	{
648	if (!ev_is_active (w))
649	return;
650
651	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652	ev_stop ((W)w);
653
654	++fdchangecnt;
655	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656	fdchanges [fdchangecnt - 1] = w->fd;
657	}
658
659
660	void
661	evtimer_start (struct ev_timer *w)
662	{
663	if (ev_is_active (w))
664	return;
665
666	w->at += now;
667
668	ev_start ((W)w, ++timercnt);
669	array_needsize (timers, timermax, timercnt, );
670	timers [timercnt - 1] = w;
671	upheap ((WT *)timers, timercnt - 1);
672	}
673
674	void
675	evtimer_stop (struct ev_timer *w)
676	{
677	if (!ev_is_active (w))
678	return;
679
680	if (w->active < timercnt--)
681	{
682	timers [w->active - 1] = timers [timercnt];
683	downheap ((WT *)timers, timercnt, w->active - 1);
684	}	1932	{
685		1933	if (w->repeat)
686	ev_stop ((W)w);	1934	{
		1935	ev_at (w) = mn_now + w->repeat;
		1936	adjustheap (timers, timercnt, ((W)w)->active);
		1937	}
		1938	else
		1939	ev_timer_stop (EV_A_ w);
		1940	}
		1941	else if (w->repeat)
		1942	{
		1943	w->at = w->repeat;
		1944	ev_timer_start (EV_A_ w);
		1945	}
687	}	1946	}
688		1947
689	void	1948	#if EV_PERIODIC_ENABLE
		1949	void noinline
690	evperiodic_start (struct ev_periodic *w)	1950	ev_periodic_start (EV_P_ ev_periodic *w)
691	{	1951	{
692	if (ev_is_active (w))	1952	if (expect_false (ev_is_active (w)))
693	return;	1953	return;
694		1954
		1955	if (w->reschedule_cb)
		1956	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1957	else if (w->interval)
		1958	{
		1959	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
695	/* this formula differs from the one in periodic_reify because we do not always round up */	1960	/* this formula differs from the one in periodic_reify because we do not always round up */
696	if (w->interval)
697	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1961	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1962	}
		1963	else
		1964	ev_at (w) = w->offset;
698		1965
699	ev_start ((W)w, ++periodiccnt);	1966	ev_start (EV_A_ (W)w, ++periodiccnt);
700	array_needsize (periodics, periodicmax, periodiccnt, );	1967	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
701	periodics [periodiccnt - 1] = w;	1968	periodics [periodiccnt] = (WT)w;
702	upheap ((WT *)periodics, periodiccnt - 1);	1969	upheap (periodics, periodiccnt);
703	}
704		1970
705	void	1971	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1972	}
		1973
		1974	void noinline
706	evperiodic_stop (struct ev_periodic *w)	1975	ev_periodic_stop (EV_P_ ev_periodic *w)
707	{	1976	{
		1977	clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1978	if (expect_false (!ev_is_active (w)))
709	return;	1979	return;
710		1980
711	if (w->active < periodiccnt--)	1981	assert (("internal periodic heap corruption", periodics [((W)w)->active] == (WT)w));
		1982
		1983	{
		1984	int active = ((W)w)->active;
		1985
		1986	if (expect_true (active < periodiccnt))
712	{	1987	{
713	periodics [w->active - 1] = periodics [periodiccnt];	1988	periodics [active] = periodics [periodiccnt];
714	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1989	adjustheap (periodics, periodiccnt, active);
715	}	1990	}
716		1991
		1992	--periodiccnt;
		1993	}
		1994
717	ev_stop ((W)w);	1995	ev_stop (EV_A_ (W)w);
718	}	1996	}
719		1997
720	void	1998	void noinline
		1999	ev_periodic_again (EV_P_ ev_periodic *w)
		2000	{
		2001	/* TODO: use adjustheap and recalculation */
		2002	ev_periodic_stop (EV_A_ w);
		2003	ev_periodic_start (EV_A_ w);
		2004	}
		2005	#endif
		2006
		2007	#ifndef SA_RESTART
		2008	# define SA_RESTART 0
		2009	#endif
		2010
		2011	void noinline
721	evsignal_start (struct ev_signal *w)	2012	ev_signal_start (EV_P_ ev_signal *w)
722	{	2013	{
		2014	#if EV_MULTIPLICITY
		2015	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2016	#endif
723	if (ev_is_active (w))	2017	if (expect_false (ev_is_active (w)))
724	return;	2018	return;
725		2019
726	ev_start ((W)w, 1);	2020	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2021
		2022	evpipe_init (EV_A);
		2023
		2024	{
		2025	#ifndef _WIN32
		2026	sigset_t full, prev;
		2027	sigfillset (&full);
		2028	sigprocmask (SIG_SETMASK, &full, &prev);
		2029	#endif
		2030
727	array_needsize (signals, signalmax, w->signum, signals_init);	2031	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2032
		2033	#ifndef _WIN32
		2034	sigprocmask (SIG_SETMASK, &prev, 0);
		2035	#endif
		2036	}
		2037
		2038	ev_start (EV_A_ (W)w, 1);
728	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2039	wlist_add (&signals [w->signum - 1].head, (WL)w);
729		2040
730	if (!w->next)	2041	if (!((WL)w)->next)
731	{	2042	{
		2043	#if _WIN32
		2044	signal (w->signum, ev_sighandler);
		2045	#else
732	struct sigaction sa;	2046	struct sigaction sa;
733	sa.sa_handler = sighandler;	2047	sa.sa_handler = ev_sighandler;
734	sigfillset (&sa.sa_mask);	2048	sigfillset (&sa.sa_mask);
735	sa.sa_flags = 0;	2049	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736	sigaction (w->signum, &sa, 0);	2050	sigaction (w->signum, &sa, 0);
		2051	#endif
737	}	2052	}
738	}	2053	}
739		2054
740	void	2055	void noinline
741	evsignal_stop (struct ev_signal *w)	2056	ev_signal_stop (EV_P_ ev_signal *w)
742	{	2057	{
		2058	clear_pending (EV_A_ (W)w);
743	if (!ev_is_active (w))	2059	if (expect_false (!ev_is_active (w)))
744	return;	2060	return;
745		2061
746	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2062	wlist_del (&signals [w->signum - 1].head, (WL)w);
747	ev_stop ((W)w);	2063	ev_stop (EV_A_ (W)w);
748		2064
749	if (!signals [w->signum - 1].head)	2065	if (!signals [w->signum - 1].head)
750	signal (w->signum, SIG_DFL);	2066	signal (w->signum, SIG_DFL);
751	}	2067	}
752		2068
753	void evidle_start (struct ev_idle *w)	2069	void
		2070	ev_child_start (EV_P_ ev_child *w)
754	{	2071	{
		2072	#if EV_MULTIPLICITY
		2073	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2074	#endif
755	if (ev_is_active (w))	2075	if (expect_false (ev_is_active (w)))
756	return;	2076	return;
757		2077
758	ev_start ((W)w, ++idlecnt);	2078	ev_start (EV_A_ (W)w, 1);
759	array_needsize (idles, idlemax, idlecnt, );	2079	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
760	idles [idlecnt - 1] = w;
761	}	2080	}
762		2081
763	void evidle_stop (struct ev_idle *w)	2082	void
		2083	ev_child_stop (EV_P_ ev_child *w)
764	{	2084	{
765	idles [w->active - 1] = idles [--idlecnt];	2085	clear_pending (EV_A_ (W)w);
		2086	if (expect_false (!ev_is_active (w)))
		2087	return;
		2088
		2089	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
766	ev_stop ((W)w);	2090	ev_stop (EV_A_ (W)w);
767	}	2091	}
768		2092
		2093	#if EV_STAT_ENABLE
		2094
		2095	# ifdef _WIN32
		2096	# undef lstat
		2097	# define lstat(a,b) _stati64 (a,b)
		2098	# endif
		2099
		2100	#define DEF_STAT_INTERVAL 5.0074891
		2101	#define MIN_STAT_INTERVAL 0.1074891
		2102
		2103	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2104
		2105	#if EV_USE_INOTIFY
		2106	# define EV_INOTIFY_BUFSIZE 8192
		2107
		2108	static void noinline
		2109	infy_add (EV_P_ ev_stat *w)
		2110	{
		2111	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);
		2112
		2113	if (w->wd < 0)
		2114	{
		2115	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2116
		2117	/* monitor some parent directory for speedup hints */
		2118	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2119	{
		2120	char path [4096];
		2121	strcpy (path, w->path);
		2122
		2123	do
		2124	{
		2125	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2126	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2127
		2128	char *pend = strrchr (path, '/');
		2129
		2130	if (!pend)
		2131	break; /* whoops, no '/', complain to your admin */
		2132
		2133	*pend = 0;
		2134	w->wd = inotify_add_watch (fs_fd, path, mask);
		2135	}
		2136	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2137	}
		2138	}
		2139	else
		2140	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2141
		2142	if (w->wd >= 0)
		2143	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2144	}
		2145
		2146	static void noinline
		2147	infy_del (EV_P_ ev_stat *w)
		2148	{
		2149	int slot;
		2150	int wd = w->wd;
		2151
		2152	if (wd < 0)
		2153	return;
		2154
		2155	w->wd = -2;
		2156	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2157	wlist_del (&fs_hash [slot].head, (WL)w);
		2158
		2159	/* remove this watcher, if others are watching it, they will rearm */
		2160	inotify_rm_watch (fs_fd, wd);
		2161	}
		2162
		2163	static void noinline
		2164	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2165	{
		2166	if (slot < 0)
		2167	/* overflow, need to check for all hahs slots */
		2168	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2169	infy_wd (EV_A_ slot, wd, ev);
		2170	else
		2171	{
		2172	WL w_;
		2173
		2174	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2175	{
		2176	ev_stat *w = (ev_stat *)w_;
		2177	w_ = w_->next; /* lets us remove this watcher and all before it */
		2178
		2179	if (w->wd == wd || wd == -1)
		2180	{
		2181	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2182	{
		2183	w->wd = -1;
		2184	infy_add (EV_A_ w); /* re-add, no matter what */
		2185	}
		2186
		2187	stat_timer_cb (EV_A_ &w->timer, 0);
		2188	}
		2189	}
		2190	}
		2191	}
		2192
		2193	static void
		2194	infy_cb (EV_P_ ev_io *w, int revents)
		2195	{
		2196	char buf [EV_INOTIFY_BUFSIZE];
		2197	struct inotify_event *ev = (struct inotify_event *)buf;
		2198	int ofs;
		2199	int len = read (fs_fd, buf, sizeof (buf));
		2200
		2201	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2202	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2203	}
		2204
		2205	void inline_size
		2206	infy_init (EV_P)
		2207	{
		2208	if (fs_fd != -2)
		2209	return;
		2210
		2211	fs_fd = inotify_init ();
		2212
		2213	if (fs_fd >= 0)
		2214	{
		2215	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2216	ev_set_priority (&fs_w, EV_MAXPRI);
		2217	ev_io_start (EV_A_ &fs_w);
		2218	}
		2219	}
		2220
		2221	void inline_size
		2222	infy_fork (EV_P)
		2223	{
		2224	int slot;
		2225
		2226	if (fs_fd < 0)
		2227	return;
		2228
		2229	close (fs_fd);
		2230	fs_fd = inotify_init ();
		2231
		2232	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2233	{
		2234	WL w_ = fs_hash [slot].head;
		2235	fs_hash [slot].head = 0;
		2236
		2237	while (w_)
		2238	{
		2239	ev_stat *w = (ev_stat *)w_;
		2240	w_ = w_->next; /* lets us add this watcher */
		2241
		2242	w->wd = -1;
		2243
		2244	if (fs_fd >= 0)
		2245	infy_add (EV_A_ w); /* re-add, no matter what */
		2246	else
		2247	ev_timer_start (EV_A_ &w->timer);
		2248	}
		2249
		2250	}
		2251	}
		2252
		2253	#endif
		2254
		2255	void
		2256	ev_stat_stat (EV_P_ ev_stat *w)
		2257	{
		2258	if (lstat (w->path, &w->attr) < 0)
		2259	w->attr.st_nlink = 0;
		2260	else if (!w->attr.st_nlink)
		2261	w->attr.st_nlink = 1;
		2262	}
		2263
		2264	static void noinline
		2265	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2266	{
		2267	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2268
		2269	/* we copy this here each the time so that */
		2270	/* prev has the old value when the callback gets invoked */
		2271	w->prev = w->attr;
		2272	ev_stat_stat (EV_A_ w);
		2273
		2274	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2275	if (
		2276	w->prev.st_dev != w->attr.st_dev
		2277	|| w->prev.st_ino != w->attr.st_ino
		2278	|| w->prev.st_mode != w->attr.st_mode
		2279	|| w->prev.st_nlink != w->attr.st_nlink
		2280	|| w->prev.st_uid != w->attr.st_uid
		2281	|| w->prev.st_gid != w->attr.st_gid
		2282	|| w->prev.st_rdev != w->attr.st_rdev
		2283	|| w->prev.st_size != w->attr.st_size
		2284	|| w->prev.st_atime != w->attr.st_atime
		2285	|| w->prev.st_mtime != w->attr.st_mtime
		2286	|| w->prev.st_ctime != w->attr.st_ctime
		2287	) {
		2288	#if EV_USE_INOTIFY
		2289	infy_del (EV_A_ w);
		2290	infy_add (EV_A_ w);
		2291	ev_stat_stat (EV_A_ w); /* avoid race... */
		2292	#endif
		2293
		2294	ev_feed_event (EV_A_ w, EV_STAT);
		2295	}
		2296	}
		2297
		2298	void
		2299	ev_stat_start (EV_P_ ev_stat *w)
		2300	{
		2301	if (expect_false (ev_is_active (w)))
		2302	return;
		2303
		2304	/* since we use memcmp, we need to clear any padding data etc. */
		2305	memset (&w->prev, 0, sizeof (ev_statdata));
		2306	memset (&w->attr, 0, sizeof (ev_statdata));
		2307
		2308	ev_stat_stat (EV_A_ w);
		2309
		2310	if (w->interval < MIN_STAT_INTERVAL)
		2311	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2312
		2313	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2314	ev_set_priority (&w->timer, ev_priority (w));
		2315
		2316	#if EV_USE_INOTIFY
		2317	infy_init (EV_A);
		2318
		2319	if (fs_fd >= 0)
		2320	infy_add (EV_A_ w);
		2321	else
		2322	#endif
		2323	ev_timer_start (EV_A_ &w->timer);
		2324
		2325	ev_start (EV_A_ (W)w, 1);
		2326	}
		2327
		2328	void
		2329	ev_stat_stop (EV_P_ ev_stat *w)
		2330	{
		2331	clear_pending (EV_A_ (W)w);
		2332	if (expect_false (!ev_is_active (w)))
		2333	return;
		2334
		2335	#if EV_USE_INOTIFY
		2336	infy_del (EV_A_ w);
		2337	#endif
		2338	ev_timer_stop (EV_A_ &w->timer);
		2339
		2340	ev_stop (EV_A_ (W)w);
		2341	}
		2342	#endif
		2343
		2344	#if EV_IDLE_ENABLE
		2345	void
		2346	ev_idle_start (EV_P_ ev_idle *w)
		2347	{
		2348	if (expect_false (ev_is_active (w)))
		2349	return;
		2350
		2351	pri_adjust (EV_A_ (W)w);
		2352
		2353	{
		2354	int active = ++idlecnt [ABSPRI (w)];
		2355
		2356	++idleall;
		2357	ev_start (EV_A_ (W)w, active);
		2358
		2359	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2360	idles [ABSPRI (w)][active - 1] = w;
		2361	}
		2362	}
		2363
		2364	void
		2365	ev_idle_stop (EV_P_ ev_idle *w)
		2366	{
		2367	clear_pending (EV_A_ (W)w);
		2368	if (expect_false (!ev_is_active (w)))
		2369	return;
		2370
		2371	{
		2372	int active = ((W)w)->active;
		2373
		2374	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2375	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2376
		2377	ev_stop (EV_A_ (W)w);
		2378	--idleall;
		2379	}
		2380	}
		2381	#endif
		2382
		2383	void
		2384	ev_prepare_start (EV_P_ ev_prepare *w)
		2385	{
		2386	if (expect_false (ev_is_active (w)))
		2387	return;
		2388
		2389	ev_start (EV_A_ (W)w, ++preparecnt);
		2390	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2391	prepares [preparecnt - 1] = w;
		2392	}
		2393
		2394	void
		2395	ev_prepare_stop (EV_P_ ev_prepare *w)
		2396	{
		2397	clear_pending (EV_A_ (W)w);
		2398	if (expect_false (!ev_is_active (w)))
		2399	return;
		2400
		2401	{
		2402	int active = ((W)w)->active;
		2403	prepares [active - 1] = prepares [--preparecnt];
		2404	((W)prepares [active - 1])->active = active;
		2405	}
		2406
		2407	ev_stop (EV_A_ (W)w);
		2408	}
		2409
		2410	void
769	void evcheck_start (struct ev_check *w)	2411	ev_check_start (EV_P_ ev_check *w)
770	{	2412	{
771	if (ev_is_active (w))	2413	if (expect_false (ev_is_active (w)))
772	return;	2414	return;
773		2415
774	ev_start ((W)w, ++checkcnt);	2416	ev_start (EV_A_ (W)w, ++checkcnt);
775	array_needsize (checks, checkmax, checkcnt, );	2417	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
776	checks [checkcnt - 1] = w;	2418	checks [checkcnt - 1] = w;
777	}	2419	}
778		2420
		2421	void
779	void evcheck_stop (struct ev_check *w)	2422	ev_check_stop (EV_P_ ev_check *w)
780	{	2423	{
		2424	clear_pending (EV_A_ (W)w);
		2425	if (expect_false (!ev_is_active (w)))
		2426	return;
		2427
		2428	{
		2429	int active = ((W)w)->active;
781	checks [w->active - 1] = checks [--checkcnt];	2430	checks [active - 1] = checks [--checkcnt];
		2431	((W)checks [active - 1])->active = active;
		2432	}
		2433
782	ev_stop ((W)w);	2434	ev_stop (EV_A_ (W)w);
783	}	2435	}
		2436
		2437	#if EV_EMBED_ENABLE
		2438	void noinline
		2439	ev_embed_sweep (EV_P_ ev_embed *w)
		2440	{
		2441	ev_loop (w->other, EVLOOP_NONBLOCK);
		2442	}
		2443
		2444	static void
		2445	embed_io_cb (EV_P_ ev_io *io, int revents)
		2446	{
		2447	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2448
		2449	if (ev_cb (w))
		2450	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2451	else
		2452	ev_loop (w->other, EVLOOP_NONBLOCK);
		2453	}
		2454
		2455	static void
		2456	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2457	{
		2458	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2459
		2460	{
		2461	struct ev_loop *loop = w->other;
		2462
		2463	while (fdchangecnt)
		2464	{
		2465	fd_reify (EV_A);
		2466	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2467	}
		2468	}
		2469	}
		2470
		2471	#if 0
		2472	static void
		2473	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2474	{
		2475	ev_idle_stop (EV_A_ idle);
		2476	}
		2477	#endif
		2478
		2479	void
		2480	ev_embed_start (EV_P_ ev_embed *w)
		2481	{
		2482	if (expect_false (ev_is_active (w)))
		2483	return;
		2484
		2485	{
		2486	struct ev_loop *loop = w->other;
		2487	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2488	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2489	}
		2490
		2491	ev_set_priority (&w->io, ev_priority (w));
		2492	ev_io_start (EV_A_ &w->io);
		2493
		2494	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2495	ev_set_priority (&w->prepare, EV_MINPRI);
		2496	ev_prepare_start (EV_A_ &w->prepare);
		2497
		2498	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2499
		2500	ev_start (EV_A_ (W)w, 1);
		2501	}
		2502
		2503	void
		2504	ev_embed_stop (EV_P_ ev_embed *w)
		2505	{
		2506	clear_pending (EV_A_ (W)w);
		2507	if (expect_false (!ev_is_active (w)))
		2508	return;
		2509
		2510	ev_io_stop (EV_A_ &w->io);
		2511	ev_prepare_stop (EV_A_ &w->prepare);
		2512
		2513	ev_stop (EV_A_ (W)w);
		2514	}
		2515	#endif
		2516
		2517	#if EV_FORK_ENABLE
		2518	void
		2519	ev_fork_start (EV_P_ ev_fork *w)
		2520	{
		2521	if (expect_false (ev_is_active (w)))
		2522	return;
		2523
		2524	ev_start (EV_A_ (W)w, ++forkcnt);
		2525	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2526	forks [forkcnt - 1] = w;
		2527	}
		2528
		2529	void
		2530	ev_fork_stop (EV_P_ ev_fork *w)
		2531	{
		2532	clear_pending (EV_A_ (W)w);
		2533	if (expect_false (!ev_is_active (w)))
		2534	return;
		2535
		2536	{
		2537	int active = ((W)w)->active;
		2538	forks [active - 1] = forks [--forkcnt];
		2539	((W)forks [active - 1])->active = active;
		2540	}
		2541
		2542	ev_stop (EV_A_ (W)w);
		2543	}
		2544	#endif
		2545
		2546	#if EV_ASYNC_ENABLE
		2547	void
		2548	ev_async_start (EV_P_ ev_async *w)
		2549	{
		2550	if (expect_false (ev_is_active (w)))
		2551	return;
		2552
		2553	evpipe_init (EV_A);
		2554
		2555	ev_start (EV_A_ (W)w, ++asynccnt);
		2556	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2557	asyncs [asynccnt - 1] = w;
		2558	}
		2559
		2560	void
		2561	ev_async_stop (EV_P_ ev_async *w)
		2562	{
		2563	clear_pending (EV_A_ (W)w);
		2564	if (expect_false (!ev_is_active (w)))
		2565	return;
		2566
		2567	{
		2568	int active = ((W)w)->active;
		2569	asyncs [active - 1] = asyncs [--asynccnt];
		2570	((W)asyncs [active - 1])->active = active;
		2571	}
		2572
		2573	ev_stop (EV_A_ (W)w);
		2574	}
		2575
		2576	void
		2577	ev_async_send (EV_P_ ev_async *w)
		2578	{
		2579	w->sent = 1;
		2580	evpipe_write (EV_A_ &gotasync);
		2581	}
		2582	#endif
784		2583
785	/*****************************************************************************/	2584	/*****************************************************************************/
786		2585
787	#if 1	2586	struct ev_once
788		2587	{
789	struct ev_io wio;	2588	ev_io io;
		2589	ev_timer to;
		2590	void (*cb)(int revents, void *arg);
		2591	void *arg;
		2592	};
790		2593
791	static void	2594	static void
792	sin_cb (struct ev_io *w, int revents)	2595	once_cb (EV_P_ struct ev_once *once, int revents)
793	{	2596	{
794	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2597	void (*cb)(int revents, void *arg) = once->cb;
		2598	void *arg = once->arg;
		2599
		2600	ev_io_stop (EV_A_ &once->io);
		2601	ev_timer_stop (EV_A_ &once->to);
		2602	ev_free (once);
		2603
		2604	cb (revents, arg);
795	}	2605	}
796		2606
797	static void	2607	static void
798	ocb (struct ev_timer *w, int revents)	2608	once_cb_io (EV_P_ ev_io *w, int revents)
799	{	2609	{
800	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2610	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
801	evtimer_stop (w);
802	evtimer_start (w);
803	}	2611	}
804		2612
805	static void	2613	static void
806	scb (struct ev_signal *w, int revents)	2614	once_cb_to (EV_P_ ev_timer *w, int revents)
807	{	2615	{
808	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2616	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
809	evio_stop (&wio);
810	evio_start (&wio);
811	}	2617	}
812		2618
813	static void	2619	void
814	gcb (struct ev_signal *w, int revents)	2620	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
815	{	2621	{
816	fprintf (stderr, "generic %x\n", revents);	2622	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
817		2623
818	}	2624	if (expect_false (!once))
819
820	int main (void)
821	{
822	ev_init (0);
823
824	evio_init (&wio, sin_cb, 0, EV_READ);
825	evio_start (&wio);
826
827	struct ev_timer t[10000];
828
829	#if 0
830	int i;
831	for (i = 0; i < 10000; ++i)
832	{
833	struct ev_timer *w = t + i;
834	evw_init (w, ocb, i);
835	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
836	evtimer_start (w);
837	if (drand48 () < 0.5)
838	evtimer_stop (w);
839	}	2625	{
840	#endif	2626	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
841
842	struct ev_timer t1;
843	evtimer_init (&t1, ocb, 5, 10);
844	evtimer_start (&t1);
845
846	struct ev_signal sig;
847	evsignal_init (&sig, scb, SIGQUIT);
848	evsignal_start (&sig);
849
850	struct ev_check cw;
851	evcheck_init (&cw, gcb);
852	evcheck_start (&cw);
853
854	struct ev_idle iw;
855	evidle_init (&iw, gcb);
856	evidle_start (&iw);
857
858	ev_loop (0);
859
860	return 0;	2627	return;
861	}	2628	}
862		2629
863	#endif	2630	once->cb = cb;
		2631	once->arg = arg;
864		2632
		2633	ev_init (&once->io, once_cb_io);
		2634	if (fd >= 0)
		2635	{
		2636	ev_io_set (&once->io, fd, events);
		2637	ev_io_start (EV_A_ &once->io);
		2638	}
865		2639
		2640	ev_init (&once->to, once_cb_to);
		2641	if (timeout >= 0.)
		2642	{
		2643	ev_timer_set (&once->to, timeout, 0.);
		2644	ev_timer_start (EV_A_ &once->to);
		2645	}
		2646	}
866		2647
		2648	#if EV_MULTIPLICITY
		2649	#include "ev_wrap.h"
		2650	#endif
867		2651
		2652	#ifdef __cplusplus
		2653	}
		2654	#endif
		2655

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