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Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.235 by root, Wed May 7 14:45:17 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
		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
14	#ifdef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
		243	# undef EV_USE_MONOTONIC
15	# 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>
16	#endif	260	# endif
		261	#endif
17		262
18	#define HAVE_REALTIME 1	263	#if EV_USE_INOTIFY
19	#define HAVE_EPOLL 1	264	# include <sys/inotify.h>
20	#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 */
21		294
22	#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) */
23	#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 */
24		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	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
		336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
		338
		339	#ifdef _WIN32
		340	# include "ev_win32.c"
		341	#endif
		342
		343	/*****************************************************************************/
		344
		345	static void (*syserr_cb)(const char *msg);
		346
		347	void
		348	ev_set_syserr_cb (void (*cb)(const char *msg))
		349	{
		350	syserr_cb = cb;
		351	}
		352
		353	static void noinline
		354	syserr (const char *msg)
		355	{
		356	if (!msg)
		357	msg = "(libev) system error";
		358
		359	if (syserr_cb)
		360	syserr_cb (msg);
		361	else
		362	{
		363	perror (msg);
		364	abort ();
		365	}
		366	}
		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
		383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		384
		385	void
		386	ev_set_allocator (void *(*cb)(void *ptr, long size))
		387	{
		388	alloc = cb;
		389	}
		390
		391	inline_speed void *
		392	ev_realloc (void *ptr, long size)
		393	{
		394	ptr = alloc (ptr, size);
		395
		396	if (!ptr && size)
		397	{
		398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		399	abort ();
		400	}
		401
		402	return ptr;
		403	}
		404
		405	#define ev_malloc(size) ev_realloc (0, (size))
		406	#define ev_free(ptr) ev_realloc ((ptr), 0)
		407
		408	/*****************************************************************************/
		409
		410	typedef struct
		411	{
		412	WL head;
		413	unsigned char events;
		414	unsigned char reify;
		415	#if EV_SELECT_IS_WINSOCKET
		416	SOCKET handle;
		417	#endif
		418	} ANFD;
		419
		420	typedef struct
		421	{
		422	W w;
		423	int events;
		424	} ANPENDING;
		425
		426	#if EV_USE_INOTIFY
		427	typedef struct
		428	{
		429	WL head;
		430	} ANFS;
		431	#endif
		432
		433	#if EV_MULTIPLICITY
		434
		435	struct ev_loop
		436	{
		437	ev_tstamp ev_rt_now;
		438	#define ev_rt_now ((loop)->ev_rt_now)
		439	#define VAR(name,decl) decl;
		440	#include "ev_vars.h"
		441	#undef VAR
		442	};
25	#include "ev.h"	443	#include "ev_wrap.h"
26		444
27	struct ev_watcher {	445	static struct ev_loop default_loop_struct;
28	EV_WATCHER (ev_watcher);	446	struct ev_loop *ev_default_loop_ptr;
29	};
30		447
31	struct ev_watcher_list {	448	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		449
35	static ev_tstamp now, diff; /* monotonic clock */
36	ev_tstamp ev_now;	450	ev_tstamp ev_rt_now;
37	int ev_method;	451	#define VAR(name,decl) static decl;
		452	#include "ev_vars.h"
		453	#undef VAR
38		454
39	static int have_monotonic; /* runtime */	455	static int ev_default_loop_ptr;
40		456
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	457	#endif
42	static void (*method_modify)(int fd, int oev, int nev);	458
43	static void (*method_poll)(ev_tstamp timeout);	459	/*****************************************************************************/
44		460
45	ev_tstamp	461	ev_tstamp
46	ev_time (void)	462	ev_time (void)
47	{	463	{
48	#if HAVE_REALTIME	464	#if EV_USE_REALTIME
49	struct timespec ts;	465	struct timespec ts;
50	clock_gettime (CLOCK_REALTIME, &ts);	466	clock_gettime (CLOCK_REALTIME, &ts);
51	return ts.tv_sec + ts.tv_nsec * 1e-9;	467	return ts.tv_sec + ts.tv_nsec * 1e-9;
52	#else	468	#else
53	struct timeval tv;	469	struct timeval tv;
54	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
55	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
56	#endif	472	#endif
57	}	473	}
58		474
59	static ev_tstamp	475	ev_tstamp inline_size
60	get_clock (void)	476	get_clock (void)
61	{	477	{
62	#if HAVE_MONOTONIC	478	#if EV_USE_MONOTONIC
63	if (have_monotonic)	479	if (expect_true (have_monotonic))
64	{	480	{
65	struct timespec ts;	481	struct timespec ts;
66	clock_gettime (CLOCK_MONOTONIC, &ts);	482	clock_gettime (CLOCK_MONOTONIC, &ts);
67	return ts.tv_sec + ts.tv_nsec * 1e-9;	483	return ts.tv_sec + ts.tv_nsec * 1e-9;
68	}	484	}
69	#endif	485	#endif
70		486
71	return ev_time ();	487	return ev_time ();
72	}	488	}
73		489
		490	#if EV_MULTIPLICITY
		491	ev_tstamp
		492	ev_now (EV_P)
		493	{
		494	return ev_rt_now;
		495	}
		496	#endif
		497
		498	void
		499	ev_sleep (ev_tstamp delay)
		500	{
		501	if (delay > 0.)
		502	{
		503	#if EV_USE_NANOSLEEP
		504	struct timespec ts;
		505
		506	ts.tv_sec = (time_t)delay;
		507	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		508
		509	nanosleep (&ts, 0);
		510	#elif defined(_WIN32)
		511	Sleep ((unsigned long)(delay * 1e3));
		512	#else
		513	struct timeval tv;
		514
		515	tv.tv_sec = (time_t)delay;
		516	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		517
		518	select (0, 0, 0, 0, &tv);
		519	#endif
		520	}
		521	}
		522
		523	/*****************************************************************************/
		524
		525	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		526
		527	int inline_size
		528	array_nextsize (int elem, int cur, int cnt)
		529	{
		530	int ncur = cur + 1;
		531
		532	do
		533	ncur <<= 1;
		534	while (cnt > ncur);
		535
		536	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		537	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		538	{
		539	ncur *= elem;
		540	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		541	ncur = ncur - sizeof (void *) * 4;
		542	ncur /= elem;
		543	}
		544
		545	return ncur;
		546	}
		547
		548	static noinline void *
		549	array_realloc (int elem, void *base, int *cur, int cnt)
		550	{
		551	*cur = array_nextsize (elem, *cur, cnt);
		552	return ev_realloc (base, elem * *cur);
		553	}
		554
74	#define array_needsize(base,cur,cnt,init) \	555	#define array_needsize(type,base,cur,cnt,init) \
75	if ((cnt) > cur) \	556	if (expect_false ((cnt) > (cur))) \
76	{ \	557	{ \
77	int newcnt = cur ? cur << 1 : 16; \	558	int ocur_ = (cur); \
78	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	559	(base) = (type *)array_realloc \
79	base = realloc (base, sizeof (*base) * (newcnt)); \	560	(sizeof (type), (base), &(cur), (cnt)); \
80	init (base + cur, newcnt - cur); \	561	init ((base) + (ocur_), (cur) - ocur_); \
81	cur = newcnt; \	562	}
		563
		564	#if 0
		565	#define array_slim(type,stem) \
		566	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		567	{ \
		568	stem ## max = array_roundsize (stem ## cnt >> 1); \
		569	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		570	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		571	}
		572	#endif
		573
		574	#define array_free(stem, idx) \
		575	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		576
		577	/*****************************************************************************/
		578
		579	void noinline
		580	ev_feed_event (EV_P_ void *w, int revents)
		581	{
		582	W w_ = (W)w;
		583	int pri = ABSPRI (w_);
		584
		585	if (expect_false (w_->pending))
		586	pendings [pri][w_->pending - 1].events |= revents;
		587	else
		588	{
		589	w_->pending = ++pendingcnt [pri];
		590	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		591	pendings [pri][w_->pending - 1].w = w_;
		592	pendings [pri][w_->pending - 1].events = revents;
		593	}
		594	}
		595
		596	void inline_speed
		597	queue_events (EV_P_ W *events, int eventcnt, int type)
		598	{
		599	int i;
		600
		601	for (i = 0; i < eventcnt; ++i)
		602	ev_feed_event (EV_A_ events [i], type);
		603	}
		604
		605	/*****************************************************************************/
		606
		607	void inline_size
		608	anfds_init (ANFD *base, int count)
		609	{
		610	while (count--)
		611	{
		612	base->head = 0;
		613	base->events = EV_NONE;
		614	base->reify = 0;
		615
		616	++base;
		617	}
		618	}
		619
		620	void inline_speed
		621	fd_event (EV_P_ int fd, int revents)
		622	{
		623	ANFD *anfd = anfds + fd;
		624	ev_io *w;
		625
		626	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		627	{
		628	int ev = w->events & revents;
		629
		630	if (ev)
		631	ev_feed_event (EV_A_ (W)w, ev);
		632	}
		633	}
		634
		635	void
		636	ev_feed_fd_event (EV_P_ int fd, int revents)
		637	{
		638	if (fd >= 0 && fd < anfdmax)
		639	fd_event (EV_A_ fd, revents);
		640	}
		641
		642	void inline_size
		643	fd_reify (EV_P)
		644	{
		645	int i;
		646
		647	for (i = 0; i < fdchangecnt; ++i)
		648	{
		649	int fd = fdchanges [i];
		650	ANFD *anfd = anfds + fd;
		651	ev_io *w;
		652
		653	unsigned char events = 0;
		654
		655	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		656	events |= (unsigned char)w->events;
		657
		658	#if EV_SELECT_IS_WINSOCKET
		659	if (events)
		660	{
		661	unsigned long argp;
		662	#ifdef EV_FD_TO_WIN32_HANDLE
		663	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		664	#else
		665	anfd->handle = _get_osfhandle (fd);
		666	#endif
		667	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		668	}
		669	#endif
		670
		671	{
		672	unsigned char o_events = anfd->events;
		673	unsigned char o_reify = anfd->reify;
		674
		675	anfd->reify = 0;
		676	anfd->events = events;
		677
		678	if (o_events != events || o_reify & EV_IOFDSET)
		679	backend_modify (EV_A_ fd, o_events, events);
82	}	680	}
		681	}
		682
		683	fdchangecnt = 0;
		684	}
		685
		686	void inline_size
		687	fd_change (EV_P_ int fd, int flags)
		688	{
		689	unsigned char reify = anfds [fd].reify;
		690	anfds [fd].reify |= flags;
		691
		692	if (expect_true (!reify))
		693	{
		694	++fdchangecnt;
		695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		696	fdchanges [fdchangecnt - 1] = fd;
		697	}
		698	}
		699
		700	void inline_speed
		701	fd_kill (EV_P_ int fd)
		702	{
		703	ev_io *w;
		704
		705	while ((w = (ev_io *)anfds [fd].head))
		706	{
		707	ev_io_stop (EV_A_ w);
		708	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		709	}
		710	}
		711
		712	int inline_size
		713	fd_valid (int fd)
		714	{
		715	#ifdef _WIN32
		716	return _get_osfhandle (fd) != -1;
		717	#else
		718	return fcntl (fd, F_GETFD) != -1;
		719	#endif
		720	}
		721
		722	/* called on EBADF to verify fds */
		723	static void noinline
		724	fd_ebadf (EV_P)
		725	{
		726	int fd;
		727
		728	for (fd = 0; fd < anfdmax; ++fd)
		729	if (anfds [fd].events)
		730	if (!fd_valid (fd) == -1 && errno == EBADF)
		731	fd_kill (EV_A_ fd);
		732	}
		733
		734	/* called on ENOMEM in select/poll to kill some fds and retry */
		735	static void noinline
		736	fd_enomem (EV_P)
		737	{
		738	int fd;
		739
		740	for (fd = anfdmax; fd--; )
		741	if (anfds [fd].events)
		742	{
		743	fd_kill (EV_A_ fd);
		744	return;
		745	}
		746	}
		747
		748	/* usually called after fork if backend needs to re-arm all fds from scratch */
		749	static void noinline
		750	fd_rearm_all (EV_P)
		751	{
		752	int fd;
		753
		754	for (fd = 0; fd < anfdmax; ++fd)
		755	if (anfds [fd].events)
		756	{
		757	anfds [fd].events = 0;
		758	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		759	}
		760	}
		761
		762	/*****************************************************************************/
		763
		764	/*
		765	* at the moment we allow libev the luxury of two heaps,
		766	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		767	* which is more cache-efficient.
		768	* the difference is about 5% with 50000+ watchers.
		769	*/
		770	#define USE_4HEAP !EV_MINIMAL
		771	#if USE_4HEAP
		772
		773	#define HEAP0 3 /* index of first element in heap */
		774
		775	/* towards the root */
		776	void inline_speed
		777	upheap (WT *heap, int k)
		778	{
		779	WT w = heap [k];
		780
		781	for (;;)
		782	{
		783	int p = ((k - HEAP0 - 1) / 4) + HEAP0;
		784
		785	if (p >= HEAP0 || heap [p]->at <= w->at)
		786	break;
		787
		788	heap [k] = heap [p];
		789	ev_active (heap [k]) = k;
		790	k = p;
		791	}
		792
		793	heap [k] = w;
		794	ev_active (heap [k]) = k;
		795	}
		796
		797	/* away from the root */
		798	void inline_speed
		799	downheap (WT *heap, int N, int k)
		800	{
		801	WT w = heap [k];
		802	WT *E = heap + N + HEAP0;
		803
		804	for (;;)
		805	{
		806	ev_tstamp minat;
		807	WT *minpos;
		808	WT *pos = heap + 4 * (k - HEAP0) + HEAP0;
		809
		810	// find minimum child
		811	if (expect_true (pos +3 < E))
		812	{
		813	(minpos = pos + 0), (minat = (*minpos)->at);
		814	if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		815	if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		816	if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		817	}
		818	else
		819	{
		820	if (pos >= E)
		821	break;
		822
		823	(minpos = pos + 0), (minat = (*minpos)->at);
		824	if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		825	if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		826	if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		827	}
		828
		829	if (w->at <= minat)
		830	break;
		831
		832	ev_active (*minpos) = k;
		833	heap [k] = *minpos;
		834
		835	k = minpos - heap;
		836	}
		837
		838	heap [k] = w;
		839	ev_active (heap [k]) = k;
		840	}
		841
		842	#else // 4HEAP
		843
		844	#define HEAP0 1
		845
		846	/* towards the root */
		847	void inline_speed
		848	upheap (WT *heap, int k)
		849	{
		850	WT w = heap [k];
		851
		852	for (;;)
		853	{
		854	int p = k >> 1;
		855
		856	/* maybe we could use a dummy element at heap [0]? */
		857	if (!p || heap [p]->at <= w->at)
		858	break;
		859
		860	heap [k] = heap [p];
		861	ev_active (heap [k]) = k;
		862	k = p;
		863	}
		864
		865	heap [k] = w;
		866	ev_active (heap [k]) = k;
		867	}
		868
		869	/* away from the root */
		870	void inline_speed
		871	downheap (WT *heap, int N, int k)
		872	{
		873	WT w = heap [k];
		874
		875	for (;;)
		876	{
		877	int c = k << 1;
		878
		879	if (c > N)
		880	break;
		881
		882	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		883	? 1 : 0;
		884
		885	if (w->at <= heap [c]->at)
		886	break;
		887
		888	heap [k] = heap [c];
		889	((W)heap [k])->active = k;
		890
		891	k = c;
		892	}
		893
		894	heap [k] = w;
		895	ev_active (heap [k]) = k;
		896	}
		897	#endif
		898
		899	void inline_size
		900	adjustheap (WT *heap, int N, int k)
		901	{
		902	upheap (heap, k);
		903	downheap (heap, N, k);
		904	}
		905
		906	/*****************************************************************************/
83		907
84	typedef struct	908	typedef struct
85	{	909	{
86	struct ev_io *head;	910	WL head;
87	unsigned char wev, rev; /* want, received event set */	911	EV_ATOMIC_T gotsig;
88	} ANFD;
89
90	static ANFD *anfds;
91	static int anfdmax;
92
93	static int *fdchanges;
94	static int fdchangemax, fdchangecnt;
95
96	static void
97	anfds_init (ANFD *base, int count)
98	{
99	while (count--)
100	{
101	base->head = 0;
102	base->wev = base->rev = EV_NONE;
103	++base;
104	}
105	}
106
107	typedef struct
108	{
109	struct ev_watcher *w;
110	int events;
111	} ANPENDING;
112
113	static ANPENDING *pendings;
114	static int pendingmax, pendingcnt;
115
116	static void
117	event (struct ev_watcher *w, int events)
118	{
119	w->pending = ++pendingcnt;
120	array_needsize (pendings, pendingmax, pendingcnt, );
121	pendings [pendingcnt - 1].w = w;
122	pendings [pendingcnt - 1].events = events;
123	}
124
125	static void
126	fd_event (int fd, int events)
127	{
128	ANFD *anfd = anfds + fd;
129	struct ev_io *w;
130
131	for (w = anfd->head; w; w = w->next)
132	{
133	int ev = w->events & events;
134
135	if (ev)
136	event ((struct ev_watcher *)w, ev);
137	}
138	}
139
140	static struct ev_timer **atimers;
141	static int atimermax, atimercnt;
142
143	static struct ev_timer **rtimers;
144	static int rtimermax, rtimercnt;
145
146	static void
147	upheap (struct ev_timer **timers, int k)
148	{
149	struct ev_timer *w = timers [k];
150
151	while (k && timers [k >> 1]->at > w->at)
152	{
153	timers [k] = timers [k >> 1];
154	timers [k]->active = k + 1;
155	k >>= 1;
156	}
157
158	timers [k] = w;
159	timers [k]->active = k + 1;
160
161	}
162
163	static void
164	downheap (struct ev_timer **timers, int N, int k)
165	{
166	struct ev_timer *w = timers [k];
167
168	while (k < (N >> 1))
169	{
170	int j = k << 1;
171
172	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
173	++j;
174
175	if (w->at <= timers [j]->at)
176	break;
177
178	timers [k] = timers [j];
179	timers [k]->active = k + 1;
180	k = j;
181	}
182
183	timers [k] = w;
184	timers [k]->active = k + 1;
185	}
186
187	typedef struct
188	{
189	struct ev_signal *head;
190	sig_atomic_t gotsig;
191	} ANSIG;	912	} ANSIG;
192		913
193	static ANSIG *signals;	914	static ANSIG *signals;
194	static int signalmax;	915	static int signalmax;
195		916
196	static int sigpipe [2];	917	static EV_ATOMIC_T gotsig;
197	static sig_atomic_t gotsig;
198	static struct ev_io sigev;
199		918
200	static void	919	void inline_size
201	signals_init (ANSIG *base, int count)	920	signals_init (ANSIG *base, int count)
202	{	921	{
203	while (count--)	922	while (count--)
204	{	923	{
205	base->head = 0;	924	base->head = 0;
206	base->gotsig = 0;	925	base->gotsig = 0;
		926
207	++base;	927	++base;
208	}	928	}
209	}	929	}
210		930
		931	/*****************************************************************************/
		932
		933	void inline_speed
		934	fd_intern (int fd)
		935	{
		936	#ifdef _WIN32
		937	int arg = 1;
		938	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		939	#else
		940	fcntl (fd, F_SETFD, FD_CLOEXEC);
		941	fcntl (fd, F_SETFL, O_NONBLOCK);
		942	#endif
		943	}
		944
		945	static void noinline
		946	evpipe_init (EV_P)
		947	{
		948	if (!ev_is_active (&pipeev))
		949	{
		950	#if EV_USE_EVENTFD
		951	if ((evfd = eventfd (0, 0)) >= 0)
		952	{
		953	evpipe [0] = -1;
		954	fd_intern (evfd);
		955	ev_io_set (&pipeev, evfd, EV_READ);
		956	}
		957	else
		958	#endif
		959	{
		960	while (pipe (evpipe))
		961	syserr ("(libev) error creating signal/async pipe");
		962
		963	fd_intern (evpipe [0]);
		964	fd_intern (evpipe [1]);
		965	ev_io_set (&pipeev, evpipe [0], EV_READ);
		966	}
		967
		968	ev_io_start (EV_A_ &pipeev);
		969	ev_unref (EV_A); /* watcher should not keep loop alive */
		970	}
		971	}
		972
		973	void inline_size
		974	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		975	{
		976	if (!*flag)
		977	{
		978	int old_errno = errno; /* save errno because write might clobber it */
		979
		980	*flag = 1;
		981
		982	#if EV_USE_EVENTFD
		983	if (evfd >= 0)
		984	{
		985	uint64_t counter = 1;
		986	write (evfd, &counter, sizeof (uint64_t));
		987	}
		988	else
		989	#endif
		990	write (evpipe [1], &old_errno, 1);
		991
		992	errno = old_errno;
		993	}
		994	}
		995
211	static void	996	static void
		997	pipecb (EV_P_ ev_io *iow, int revents)
		998	{
		999	#if EV_USE_EVENTFD
		1000	if (evfd >= 0)
		1001	{
		1002	uint64_t counter;
		1003	read (evfd, &counter, sizeof (uint64_t));
		1004	}
		1005	else
		1006	#endif
		1007	{
		1008	char dummy;
		1009	read (evpipe [0], &dummy, 1);
		1010	}
		1011
		1012	if (gotsig && ev_is_default_loop (EV_A))
		1013	{
		1014	int signum;
		1015	gotsig = 0;
		1016
		1017	for (signum = signalmax; signum--; )
		1018	if (signals [signum].gotsig)
		1019	ev_feed_signal_event (EV_A_ signum + 1);
		1020	}
		1021
		1022	#if EV_ASYNC_ENABLE
		1023	if (gotasync)
		1024	{
		1025	int i;
		1026	gotasync = 0;
		1027
		1028	for (i = asynccnt; i--; )
		1029	if (asyncs [i]->sent)
		1030	{
		1031	asyncs [i]->sent = 0;
		1032	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1033	}
		1034	}
		1035	#endif
		1036	}
		1037
		1038	/*****************************************************************************/
		1039
		1040	static void
212	sighandler (int signum)	1041	ev_sighandler (int signum)
213	{	1042	{
		1043	#if EV_MULTIPLICITY
		1044	struct ev_loop *loop = &default_loop_struct;
		1045	#endif
		1046
		1047	#if _WIN32
		1048	signal (signum, ev_sighandler);
		1049	#endif
		1050
214	signals [signum - 1].gotsig = 1;	1051	signals [signum - 1].gotsig = 1;
		1052	evpipe_write (EV_A_ &gotsig);
		1053	}
215		1054
216	if (!gotsig)	1055	void noinline
		1056	ev_feed_signal_event (EV_P_ int signum)
		1057	{
		1058	WL w;
		1059
		1060	#if EV_MULTIPLICITY
		1061	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1062	#endif
		1063
		1064	--signum;
		1065
		1066	if (signum < 0 || signum >= signalmax)
		1067	return;
		1068
		1069	signals [signum].gotsig = 0;
		1070
		1071	for (w = signals [signum].head; w; w = w->next)
		1072	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1073	}
		1074
		1075	/*****************************************************************************/
		1076
		1077	static WL childs [EV_PID_HASHSIZE];
		1078
		1079	#ifndef _WIN32
		1080
		1081	static ev_signal childev;
		1082
		1083	#ifndef WIFCONTINUED
		1084	# define WIFCONTINUED(status) 0
		1085	#endif
		1086
		1087	void inline_speed
		1088	child_reap (EV_P_ int chain, int pid, int status)
		1089	{
		1090	ev_child *w;
		1091	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1092
		1093	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1094	{
		1095	if ((w->pid == pid || !w->pid)
		1096	&& (!traced || (w->flags & 1)))
		1097	{
		1098	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1099	w->rpid = pid;
		1100	w->rstatus = status;
		1101	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1102	}
		1103	}
		1104	}
		1105
		1106	#ifndef WCONTINUED
		1107	# define WCONTINUED 0
		1108	#endif
		1109
		1110	static void
		1111	childcb (EV_P_ ev_signal *sw, int revents)
		1112	{
		1113	int pid, status;
		1114
		1115	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1116	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		1117	if (!WCONTINUED
		1118	|| errno != EINVAL
		1119	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1120	return;
		1121
		1122	/* make sure we are called again until all children have been reaped */
		1123	/* we need to do it this way so that the callback gets called before we continue */
		1124	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1125
		1126	child_reap (EV_A_ pid, pid, status);
		1127	if (EV_PID_HASHSIZE > 1)
		1128	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1129	}
		1130
		1131	#endif
		1132
		1133	/*****************************************************************************/
		1134
		1135	#if EV_USE_PORT
		1136	# include "ev_port.c"
		1137	#endif
		1138	#if EV_USE_KQUEUE
		1139	# include "ev_kqueue.c"
		1140	#endif
		1141	#if EV_USE_EPOLL
		1142	# include "ev_epoll.c"
		1143	#endif
		1144	#if EV_USE_POLL
		1145	# include "ev_poll.c"
		1146	#endif
		1147	#if EV_USE_SELECT
		1148	# include "ev_select.c"
		1149	#endif
		1150
		1151	int
		1152	ev_version_major (void)
		1153	{
		1154	return EV_VERSION_MAJOR;
		1155	}
		1156
		1157	int
		1158	ev_version_minor (void)
		1159	{
		1160	return EV_VERSION_MINOR;
		1161	}
		1162
		1163	/* return true if we are running with elevated privileges and should ignore env variables */
		1164	int inline_size
		1165	enable_secure (void)
		1166	{
		1167	#ifdef _WIN32
		1168	return 0;
		1169	#else
		1170	return getuid () != geteuid ()
		1171	|| getgid () != getegid ();
		1172	#endif
		1173	}
		1174
		1175	unsigned int
		1176	ev_supported_backends (void)
		1177	{
		1178	unsigned int flags = 0;
		1179
		1180	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1181	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1182	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1183	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1184	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1185
		1186	return flags;
		1187	}
		1188
		1189	unsigned int
		1190	ev_recommended_backends (void)
		1191	{
		1192	unsigned int flags = ev_supported_backends ();
		1193
		1194	#ifndef __NetBSD__
		1195	/* kqueue is borked on everything but netbsd apparently */
		1196	/* it usually doesn't work correctly on anything but sockets and pipes */
		1197	flags &= ~EVBACKEND_KQUEUE;
		1198	#endif
		1199	#ifdef __APPLE__
		1200	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1201	flags &= ~EVBACKEND_POLL;
		1202	#endif
		1203
		1204	return flags;
		1205	}
		1206
		1207	unsigned int
		1208	ev_embeddable_backends (void)
		1209	{
		1210	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1211
		1212	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1213	/* please fix it and tell me how to detect the fix */
		1214	flags &= ~EVBACKEND_EPOLL;
		1215
		1216	return flags;
		1217	}
		1218
		1219	unsigned int
		1220	ev_backend (EV_P)
		1221	{
		1222	return backend;
		1223	}
		1224
		1225	unsigned int
		1226	ev_loop_count (EV_P)
		1227	{
		1228	return loop_count;
		1229	}
		1230
		1231	void
		1232	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1233	{
		1234	io_blocktime = interval;
		1235	}
		1236
		1237	void
		1238	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1239	{
		1240	timeout_blocktime = interval;
		1241	}
		1242
		1243	static void noinline
		1244	loop_init (EV_P_ unsigned int flags)
		1245	{
		1246	if (!backend)
		1247	{
		1248	#if EV_USE_MONOTONIC
217	{	1249	{
		1250	struct timespec ts;
		1251	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1252	have_monotonic = 1;
		1253	}
		1254	#endif
		1255
		1256	ev_rt_now = ev_time ();
		1257	mn_now = get_clock ();
		1258	now_floor = mn_now;
		1259	rtmn_diff = ev_rt_now - mn_now;
		1260
		1261	io_blocktime = 0.;
		1262	timeout_blocktime = 0.;
		1263	backend = 0;
		1264	backend_fd = -1;
		1265	gotasync = 0;
		1266	#if EV_USE_INOTIFY
		1267	fs_fd = -2;
		1268	#endif
		1269
		1270	/* pid check not overridable via env */
		1271	#ifndef _WIN32
		1272	if (flags & EVFLAG_FORKCHECK)
		1273	curpid = getpid ();
		1274	#endif
		1275
		1276	if (!(flags & EVFLAG_NOENV)
		1277	&& !enable_secure ()
		1278	&& getenv ("LIBEV_FLAGS"))
		1279	flags = atoi (getenv ("LIBEV_FLAGS"));
		1280
		1281	if (!(flags & 0x0000ffffU))
		1282	flags |= ev_recommended_backends ();
		1283
		1284	#if EV_USE_PORT
		1285	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1286	#endif
		1287	#if EV_USE_KQUEUE
		1288	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1289	#endif
		1290	#if EV_USE_EPOLL
		1291	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1292	#endif
		1293	#if EV_USE_POLL
		1294	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1295	#endif
		1296	#if EV_USE_SELECT
		1297	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1298	#endif
		1299
		1300	ev_init (&pipeev, pipecb);
		1301	ev_set_priority (&pipeev, EV_MAXPRI);
		1302	}
		1303	}
		1304
		1305	static void noinline
		1306	loop_destroy (EV_P)
		1307	{
		1308	int i;
		1309
		1310	if (ev_is_active (&pipeev))
		1311	{
		1312	ev_ref (EV_A); /* signal watcher */
		1313	ev_io_stop (EV_A_ &pipeev);
		1314
		1315	#if EV_USE_EVENTFD
		1316	if (evfd >= 0)
		1317	close (evfd);
		1318	#endif
		1319
		1320	if (evpipe [0] >= 0)
		1321	{
		1322	close (evpipe [0]);
		1323	close (evpipe [1]);
		1324	}
		1325	}
		1326
		1327	#if EV_USE_INOTIFY
		1328	if (fs_fd >= 0)
		1329	close (fs_fd);
		1330	#endif
		1331
		1332	if (backend_fd >= 0)
		1333	close (backend_fd);
		1334
		1335	#if EV_USE_PORT
		1336	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1337	#endif
		1338	#if EV_USE_KQUEUE
		1339	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1340	#endif
		1341	#if EV_USE_EPOLL
		1342	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1343	#endif
		1344	#if EV_USE_POLL
		1345	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1346	#endif
		1347	#if EV_USE_SELECT
		1348	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1349	#endif
		1350
		1351	for (i = NUMPRI; i--; )
		1352	{
		1353	array_free (pending, [i]);
		1354	#if EV_IDLE_ENABLE
		1355	array_free (idle, [i]);
		1356	#endif
		1357	}
		1358
		1359	ev_free (anfds); anfdmax = 0;
		1360
		1361	/* have to use the microsoft-never-gets-it-right macro */
		1362	array_free (fdchange, EMPTY);
		1363	array_free (timer, EMPTY);
		1364	#if EV_PERIODIC_ENABLE
		1365	array_free (periodic, EMPTY);
		1366	#endif
		1367	#if EV_FORK_ENABLE
		1368	array_free (fork, EMPTY);
		1369	#endif
		1370	array_free (prepare, EMPTY);
		1371	array_free (check, EMPTY);
		1372	#if EV_ASYNC_ENABLE
		1373	array_free (async, EMPTY);
		1374	#endif
		1375
		1376	backend = 0;
		1377	}
		1378
		1379	#if EV_USE_INOTIFY
		1380	void inline_size infy_fork (EV_P);
		1381	#endif
		1382
		1383	void inline_size
		1384	loop_fork (EV_P)
		1385	{
		1386	#if EV_USE_PORT
		1387	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1388	#endif
		1389	#if EV_USE_KQUEUE
		1390	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1391	#endif
		1392	#if EV_USE_EPOLL
		1393	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1394	#endif
		1395	#if EV_USE_INOTIFY
		1396	infy_fork (EV_A);
		1397	#endif
		1398
		1399	if (ev_is_active (&pipeev))
		1400	{
		1401	/* this "locks" the handlers against writing to the pipe */
		1402	/* while we modify the fd vars */
218	gotsig = 1;	1403	gotsig = 1;
219	write (sigpipe [1], &gotsig, 1);	1404	#if EV_ASYNC_ENABLE
		1405	gotasync = 1;
		1406	#endif
		1407
		1408	ev_ref (EV_A);
		1409	ev_io_stop (EV_A_ &pipeev);
		1410
		1411	#if EV_USE_EVENTFD
		1412	if (evfd >= 0)
		1413	close (evfd);
		1414	#endif
		1415
		1416	if (evpipe [0] >= 0)
		1417	{
		1418	close (evpipe [0]);
		1419	close (evpipe [1]);
		1420	}
		1421
		1422	evpipe_init (EV_A);
		1423	/* now iterate over everything, in case we missed something */
		1424	pipecb (EV_A_ &pipeev, EV_READ);
		1425	}
		1426
		1427	postfork = 0;
		1428	}
		1429
		1430	#if EV_MULTIPLICITY
		1431	struct ev_loop *
		1432	ev_loop_new (unsigned int flags)
		1433	{
		1434	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1435
		1436	memset (loop, 0, sizeof (struct ev_loop));
		1437
		1438	loop_init (EV_A_ flags);
		1439
		1440	if (ev_backend (EV_A))
		1441	return loop;
		1442
		1443	return 0;
		1444	}
		1445
		1446	void
		1447	ev_loop_destroy (EV_P)
		1448	{
		1449	loop_destroy (EV_A);
		1450	ev_free (loop);
		1451	}
		1452
		1453	void
		1454	ev_loop_fork (EV_P)
		1455	{
		1456	postfork = 1; /* must be in line with ev_default_fork */
		1457	}
		1458	#endif
		1459
		1460	#if EV_MULTIPLICITY
		1461	struct ev_loop *
		1462	ev_default_loop_init (unsigned int flags)
		1463	#else
		1464	int
		1465	ev_default_loop (unsigned int flags)
		1466	#endif
		1467	{
		1468	if (!ev_default_loop_ptr)
220	}	1469	{
221	}	1470	#if EV_MULTIPLICITY
		1471	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1472	#else
		1473	ev_default_loop_ptr = 1;
		1474	#endif
222		1475
223	static void	1476	loop_init (EV_A_ flags);
224	sigcb (struct ev_io *iow, int revents)	1477
		1478	if (ev_backend (EV_A))
		1479	{
		1480	#ifndef _WIN32
		1481	ev_signal_init (&childev, childcb, SIGCHLD);
		1482	ev_set_priority (&childev, EV_MAXPRI);
		1483	ev_signal_start (EV_A_ &childev);
		1484	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1485	#endif
		1486	}
		1487	else
		1488	ev_default_loop_ptr = 0;
		1489	}
		1490
		1491	return ev_default_loop_ptr;
		1492	}
		1493
		1494	void
		1495	ev_default_destroy (void)
225	{	1496	{
226	struct ev_signal *w;	1497	#if EV_MULTIPLICITY
		1498	struct ev_loop *loop = ev_default_loop_ptr;
		1499	#endif
		1500
		1501	#ifndef _WIN32
		1502	ev_ref (EV_A); /* child watcher */
		1503	ev_signal_stop (EV_A_ &childev);
		1504	#endif
		1505
		1506	loop_destroy (EV_A);
		1507	}
		1508
		1509	void
		1510	ev_default_fork (void)
		1511	{
		1512	#if EV_MULTIPLICITY
		1513	struct ev_loop *loop = ev_default_loop_ptr;
		1514	#endif
		1515
		1516	if (backend)
		1517	postfork = 1; /* must be in line with ev_loop_fork */
		1518	}
		1519
		1520	/*****************************************************************************/
		1521
		1522	void
		1523	ev_invoke (EV_P_ void *w, int revents)
		1524	{
		1525	EV_CB_INVOKE ((W)w, revents);
		1526	}
		1527
		1528	void inline_speed
		1529	call_pending (EV_P)
		1530	{
227	int sig;	1531	int pri;
228		1532
229	gotsig = 0;	1533	for (pri = NUMPRI; pri--; )
230	read (sigpipe [0], &revents, 1);	1534	while (pendingcnt [pri])
231
232	for (sig = signalmax; sig--; )
233	if (signals [sig].gotsig)
234	{	1535	{
235	signals [sig].gotsig = 0;	1536	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
236		1537
237	for (w = signals [sig].head; w; w = w->next)	1538	if (expect_true (p->w))
238	event ((struct ev_watcher *)w, EV_SIGNAL);	1539	{
		1540	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1541
		1542	p->w->pending = 0;
		1543	EV_CB_INVOKE (p->w, p->events);
		1544	}
239	}	1545	}
240	}	1546	}
241		1547
242	static void	1548	#if EV_IDLE_ENABLE
243	siginit (void)	1549	void inline_size
		1550	idle_reify (EV_P)
244	{	1551	{
245	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	1552	if (expect_false (idleall))
246	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
247
248	/* rather than sort out wether we really need nb, set it */
249	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
250	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
251
252	evio_set (&sigev, sigpipe [0], EV_READ);
253	evio_start (&sigev);
254	}
255
256	#if HAVE_EPOLL
257	# include "ev_epoll.c"
258	#endif
259	#if HAVE_SELECT
260	# include "ev_select.c"
261	#endif
262
263	int ev_init (int flags)
264	{
265	#if HAVE_MONOTONIC
266	{
267	struct timespec ts;
268	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
269	have_monotonic = 1;
270	}
271	#endif
272
273	ev_now = ev_time ();
274	now = get_clock ();
275	diff = ev_now - now;
276
277	if (pipe (sigpipe))
278	return 0;
279
280	ev_method = EVMETHOD_NONE;
281	#if HAVE_EPOLL
282	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
283	#endif
284	#if HAVE_SELECT
285	if (ev_method == EVMETHOD_NONE) select_init (flags);
286	#endif
287
288	if (ev_method)
289	{
290	evw_init (&sigev, sigcb, 0);
291	siginit ();
292	}	1553	{
		1554	int pri;
293		1555
294	return ev_method;	1556	for (pri = NUMPRI; pri--; )
295	}
296
297	void ev_prefork (void)
298	{
299	}
300
301	void ev_postfork_parent (void)
302	{
303	}
304
305	void ev_postfork_child (void)
306	{
307	#if HAVE_EPOLL
308	if (ev_method == EVMETHOD_EPOLL)
309	epoll_postfork_child ();
310	#endif
311
312	evio_stop (&sigev);
313	close (sigpipe [0]);
314	close (sigpipe [1]);
315	pipe (sigpipe);
316	siginit ();
317	}
318
319	static void
320	fd_reify (void)
321	{
322	int i;
323
324	for (i = 0; i < fdchangecnt; ++i)
325	{
326	int fd = fdchanges [i];
327	ANFD *anfd = anfds + fd;
328	struct ev_io *w;
329
330	int wev = 0;
331
332	for (w = anfd->head; w; w = w->next)
333	wev |= w->events;
334
335	if (anfd->wev != wev)
336	{	1557	{
337	method_modify (fd, anfd->wev, wev);	1558	if (pendingcnt [pri])
338	anfd->wev = wev;	1559	break;
		1560
		1561	if (idlecnt [pri])
		1562	{
		1563	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1564	break;
		1565	}
339	}	1566	}
340	}	1567	}
341
342	fdchangecnt = 0;
343	}	1568	}
		1569	#endif
344		1570
345	static void	1571	void inline_size
346	call_pending ()	1572	timers_reify (EV_P)
347	{	1573	{
348	int i;
349
350	for (i = 0; i < pendingcnt; ++i)
351	{
352	ANPENDING *p = pendings + i;
353
354	if (p->w)
355	{
356	p->w->pending = 0;
357	p->w->cb (p->w, p->events);
358	}
359	}
360
361	pendingcnt = 0;
362	}
363
364	static void
365	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)
366	{
367	while (timercnt && timers [0]->at <= now)	1574	while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
368	{	1575	{
369	struct ev_timer *w = timers [0];	1576	ev_timer *w = (ev_timer *)timers [HEAP0];
		1577
		1578	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
370		1579
371	/* first reschedule or stop timer */	1580	/* first reschedule or stop timer */
372	if (w->repeat)	1581	if (w->repeat)
373	{	1582	{
374	if (w->is_abs)	1583	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
375	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
376	else
377	w->at = now + w->repeat;
378		1584
379	assert (w->at > now);	1585	ev_at (w) += w->repeat;
		1586	if (ev_at (w) < mn_now)
		1587	ev_at (w) = mn_now;
380		1588
381	downheap (timers, timercnt, 0);	1589	downheap (timers, timercnt, HEAP0);
382	}	1590	}
383	else	1591	else
		1592	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1593
		1594	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1595	}
		1596	}
		1597
		1598	#if EV_PERIODIC_ENABLE
		1599	void inline_size
		1600	periodics_reify (EV_P)
		1601	{
		1602	while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
		1603	{
		1604	ev_periodic *w = (ev_periodic *)periodics [HEAP0];
		1605
		1606	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1607
		1608	/* first reschedule or stop timer */
		1609	if (w->reschedule_cb)
384	{	1610	{
385	evtimer_stop (w); /* nonrepeating: stop timer */	1611	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
386	--timercnt; /* maybe pass by reference instead? */	1612	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1613	downheap (periodics, periodiccnt, 1);
387	}	1614	}
		1615	else if (w->interval)
		1616	{
		1617	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1618	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1619	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1620	downheap (periodics, periodiccnt, HEAP0);
		1621	}
		1622	else
		1623	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
388		1624
389	event ((struct ev_watcher *)w, EV_TIMEOUT);	1625	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
390	}	1626	}
391	}	1627	}
392		1628
393	static void	1629	static void noinline
394	time_update ()	1630	periodics_reschedule (EV_P)
395	{	1631	{
396	int i;	1632	int i;
397	ev_now = ev_time ();
398		1633
399	if (have_monotonic)	1634	/* adjust periodics after time jump */
		1635	for (i = 1; i <= periodiccnt; ++i)
		1636	{
		1637	ev_periodic *w = (ev_periodic *)periodics [i];
		1638
		1639	if (w->reschedule_cb)
		1640	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1641	else if (w->interval)
		1642	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
400	{	1643	}
		1644
		1645	/* now rebuild the heap */
		1646	for (i = periodiccnt >> 1; --i; )
		1647	downheap (periodics, periodiccnt, i + HEAP0);
		1648	}
		1649	#endif
		1650
		1651	void inline_speed
		1652	time_update (EV_P_ ev_tstamp max_block)
		1653	{
		1654	int i;
		1655
		1656	#if EV_USE_MONOTONIC
		1657	if (expect_true (have_monotonic))
		1658	{
401	ev_tstamp odiff = diff;	1659	ev_tstamp odiff = rtmn_diff;
402		1660
403	/* detecting time jumps is much more difficult */	1661	mn_now = get_clock ();
404	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1662
		1663	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1664	/* interpolate in the meantime */
		1665	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
405	{	1666	{
406	now = get_clock ();	1667	ev_rt_now = rtmn_diff + mn_now;
		1668	return;
		1669	}
		1670
		1671	now_floor = mn_now;
		1672	ev_rt_now = ev_time ();
		1673
		1674	/* loop a few times, before making important decisions.
		1675	* on the choice of "4": one iteration isn't enough,
		1676	* in case we get preempted during the calls to
		1677	* ev_time and get_clock. a second call is almost guaranteed
		1678	* to succeed in that case, though. and looping a few more times
		1679	* doesn't hurt either as we only do this on time-jumps or
		1680	* in the unlikely event of having been preempted here.
		1681	*/
		1682	for (i = 4; --i; )
		1683	{
407	diff = ev_now - now;	1684	rtmn_diff = ev_rt_now - mn_now;
408		1685
409	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1686	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
410	return; /* all is well */	1687	return; /* all is well */
411		1688
412	ev_now = ev_time ();	1689	ev_rt_now = ev_time ();
		1690	mn_now = get_clock ();
		1691	now_floor = mn_now;
413	}	1692	}
414		1693
415	/* time jump detected, reschedule atimers */	1694	# if EV_PERIODIC_ENABLE
416	for (i = 0; i < atimercnt; ++i)	1695	periodics_reschedule (EV_A);
		1696	# endif
		1697	/* no timer adjustment, as the monotonic clock doesn't jump */
		1698	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1699	}
		1700	else
		1701	#endif
		1702	{
		1703	ev_rt_now = ev_time ();
		1704
		1705	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
417	{	1706	{
418	struct ev_timer *w = atimers [i];	1707	#if EV_PERIODIC_ENABLE
419	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1708	periodics_reschedule (EV_A);
		1709	#endif
		1710	/* adjust timers. this is easy, as the offset is the same for all of them */
		1711	for (i = 1; i <= timercnt; ++i)
		1712	ev_at (timers [i]) += ev_rt_now - mn_now;
420	}	1713	}
421	}
422	else
423	{
424	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
425	/* time jump detected, adjust rtimers */
426	for (i = 0; i < rtimercnt; ++i)
427	rtimers [i]->at += ev_now - now;
428		1714
429	now = ev_now;	1715	mn_now = ev_rt_now;
430	}	1716	}
431	}	1717	}
432		1718
433	int ev_loop_done;	1719	void
		1720	ev_ref (EV_P)
		1721	{
		1722	++activecnt;
		1723	}
434		1724
		1725	void
		1726	ev_unref (EV_P)
		1727	{
		1728	--activecnt;
		1729	}
		1730
		1731	static int loop_done;
		1732
		1733	void
435	void ev_loop (int flags)	1734	ev_loop (EV_P_ int flags)
436	{	1735	{
437	double block;	1736	loop_done = EVUNLOOP_CANCEL;
438	ev_loop_done = flags & EVLOOP_ONESHOT;	1737
		1738	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
439		1739
440	do	1740	do
441	{	1741	{
		1742	#ifndef _WIN32
		1743	if (expect_false (curpid)) /* penalise the forking check even more */
		1744	if (expect_false (getpid () != curpid))
		1745	{
		1746	curpid = getpid ();
		1747	postfork = 1;
		1748	}
		1749	#endif
		1750
		1751	#if EV_FORK_ENABLE
		1752	/* we might have forked, so queue fork handlers */
		1753	if (expect_false (postfork))
		1754	if (forkcnt)
		1755	{
		1756	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1757	call_pending (EV_A);
		1758	}
		1759	#endif
		1760
		1761	/* queue prepare watchers (and execute them) */
		1762	if (expect_false (preparecnt))
		1763	{
		1764	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1765	call_pending (EV_A);
		1766	}
		1767
		1768	if (expect_false (!activecnt))
		1769	break;
		1770
		1771	/* we might have forked, so reify kernel state if necessary */
		1772	if (expect_false (postfork))
		1773	loop_fork (EV_A);
		1774
442	/* update fd-related kernel structures */	1775	/* update fd-related kernel structures */
443	fd_reify ();	1776	fd_reify (EV_A);
444		1777
445	/* calculate blocking time */	1778	/* calculate blocking time */
446	if (flags & EVLOOP_NONBLOCK)	1779	{
447	block = 0.;	1780	ev_tstamp waittime = 0.;
448	else	1781	ev_tstamp sleeptime = 0.;
		1782
		1783	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
449	{	1784	{
		1785	/* update time to cancel out callback processing overhead */
		1786	time_update (EV_A_ 1e100);
		1787
450	block = MAX_BLOCKTIME;	1788	waittime = MAX_BLOCKTIME;
451		1789
452	if (rtimercnt)	1790	if (timercnt)
453	{	1791	{
454	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1792	ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
455	if (block > to) block = to;	1793	if (waittime > to) waittime = to;
456	}	1794	}
457		1795
		1796	#if EV_PERIODIC_ENABLE
458	if (atimercnt)	1797	if (periodiccnt)
459	{	1798	{
460	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1799	ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
461	if (block > to) block = to;	1800	if (waittime > to) waittime = to;
462	}	1801	}
		1802	#endif
463		1803
464	if (block < 0.) block = 0.;	1804	if (expect_false (waittime < timeout_blocktime))
		1805	waittime = timeout_blocktime;
		1806
		1807	sleeptime = waittime - backend_fudge;
		1808
		1809	if (expect_true (sleeptime > io_blocktime))
		1810	sleeptime = io_blocktime;
		1811
		1812	if (sleeptime)
		1813	{
		1814	ev_sleep (sleeptime);
		1815	waittime -= sleeptime;
		1816	}
465	}	1817	}
466		1818
467	method_poll (block);	1819	++loop_count;
		1820	backend_poll (EV_A_ waittime);
468		1821
469	/* update ev_now, do magic */	1822	/* update ev_rt_now, do magic */
470	time_update ();	1823	time_update (EV_A_ waittime + sleeptime);
		1824	}
471		1825
472	/* put pending timers into pendign queue and reschedule them */	1826	/* queue pending timers and reschedule them */
473	/* absolute timers first */	1827	timers_reify (EV_A); /* relative timers called last */
474	timers_reify (atimers, atimercnt, ev_now);	1828	#if EV_PERIODIC_ENABLE
475	/* relative timers second */	1829	periodics_reify (EV_A); /* absolute timers called first */
476	timers_reify (rtimers, rtimercnt, now);	1830	#endif
477		1831
		1832	#if EV_IDLE_ENABLE
		1833	/* queue idle watchers unless other events are pending */
		1834	idle_reify (EV_A);
		1835	#endif
		1836
		1837	/* queue check watchers, to be executed first */
		1838	if (expect_false (checkcnt))
		1839	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1840
478	call_pending ();	1841	call_pending (EV_A);
479	}	1842	}
480	while (!ev_loop_done);	1843	while (expect_true (
481	}	1844	activecnt
		1845	&& !loop_done
		1846	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1847	));
482		1848
483	static void	1849	if (loop_done == EVUNLOOP_ONE)
484	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1850	loop_done = EVUNLOOP_CANCEL;
		1851	}
		1852
		1853	void
		1854	ev_unloop (EV_P_ int how)
		1855	{
		1856	loop_done = how;
		1857	}
		1858
		1859	/*****************************************************************************/
		1860
		1861	void inline_size
		1862	wlist_add (WL *head, WL elem)
485	{	1863	{
486	elem->next = *head;	1864	elem->next = *head;
487	*head = elem;	1865	*head = elem;
488	}	1866	}
489		1867
490	static void	1868	void inline_size
491	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1869	wlist_del (WL *head, WL elem)
492	{	1870	{
493	while (*head)	1871	while (*head)
494	{	1872	{
495	if (*head == elem)	1873	if (*head == elem)
496	{	1874	{
…		…
500		1878
501	head = &(*head)->next;	1879	head = &(*head)->next;
502	}	1880	}
503	}	1881	}
504		1882
505	static void	1883	void inline_speed
506	ev_start (struct ev_watcher *w, int active)	1884	clear_pending (EV_P_ W w)
507	{	1885	{
		1886	if (w->pending)
		1887	{
		1888	pendings [ABSPRI (w)][w->pending - 1].w = 0;
508	w->pending = 0;	1889	w->pending = 0;
		1890	}
		1891	}
		1892
		1893	int
		1894	ev_clear_pending (EV_P_ void *w)
		1895	{
		1896	W w_ = (W)w;
		1897	int pending = w_->pending;
		1898
		1899	if (expect_true (pending))
		1900	{
		1901	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1902	w_->pending = 0;
		1903	p->w = 0;
		1904	return p->events;
		1905	}
		1906	else
		1907	return 0;
		1908	}
		1909
		1910	void inline_size
		1911	pri_adjust (EV_P_ W w)
		1912	{
		1913	int pri = w->priority;
		1914	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1915	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1916	w->priority = pri;
		1917	}
		1918
		1919	void inline_speed
		1920	ev_start (EV_P_ W w, int active)
		1921	{
		1922	pri_adjust (EV_A_ w);
509	w->active = active;	1923	w->active = active;
		1924	ev_ref (EV_A);
510	}	1925	}
511		1926
512	static void	1927	void inline_size
513	ev_stop (struct ev_watcher *w)	1928	ev_stop (EV_P_ W w)
514	{	1929	{
515	if (w->pending)	1930	ev_unref (EV_A);
516	pendings [w->pending - 1].w = 0;
517
518	w->active = 0;	1931	w->active = 0;
519	/* nop */
520	}	1932	}
521		1933
522	void	1934	/*****************************************************************************/
		1935
		1936	void noinline
523	evio_start (struct ev_io *w)	1937	ev_io_start (EV_P_ ev_io *w)
		1938	{
		1939	int fd = w->fd;
		1940
		1941	if (expect_false (ev_is_active (w)))
		1942	return;
		1943
		1944	assert (("ev_io_start called with negative fd", fd >= 0));
		1945
		1946	ev_start (EV_A_ (W)w, 1);
		1947	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1948	wlist_add (&anfds[fd].head, (WL)w);
		1949
		1950	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1951	w->events &= ~EV_IOFDSET;
		1952	}
		1953
		1954	void noinline
		1955	ev_io_stop (EV_P_ ev_io *w)
		1956	{
		1957	clear_pending (EV_A_ (W)w);
		1958	if (expect_false (!ev_is_active (w)))
		1959	return;
		1960
		1961	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1962
		1963	wlist_del (&anfds[w->fd].head, (WL)w);
		1964	ev_stop (EV_A_ (W)w);
		1965
		1966	fd_change (EV_A_ w->fd, 1);
		1967	}
		1968
		1969	void noinline
		1970	ev_timer_start (EV_P_ ev_timer *w)
		1971	{
		1972	if (expect_false (ev_is_active (w)))
		1973	return;
		1974
		1975	ev_at (w) += mn_now;
		1976
		1977	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1978
		1979	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
		1980	array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
		1981	timers [ev_active (w)] = (WT)w;
		1982	upheap (timers, ev_active (w));
		1983
		1984	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		1985	}
		1986
		1987	void noinline
		1988	ev_timer_stop (EV_P_ ev_timer *w)
		1989	{
		1990	clear_pending (EV_A_ (W)w);
		1991	if (expect_false (!ev_is_active (w)))
		1992	return;
		1993
		1994	{
		1995	int active = ev_active (w);
		1996
		1997	assert (("internal timer heap corruption", timers [active] == (WT)w));
		1998
		1999	if (expect_true (active < timercnt + HEAP0 - 1))
		2000	{
		2001	timers [active] = timers [timercnt + HEAP0 - 1];
		2002	adjustheap (timers, timercnt, active);
		2003	}
		2004
		2005	--timercnt;
		2006	}
		2007
		2008	ev_at (w) -= mn_now;
		2009
		2010	ev_stop (EV_A_ (W)w);
		2011	}
		2012
		2013	void noinline
		2014	ev_timer_again (EV_P_ ev_timer *w)
524	{	2015	{
525	if (ev_is_active (w))	2016	if (ev_is_active (w))
		2017	{
		2018	if (w->repeat)
		2019	{
		2020	ev_at (w) = mn_now + w->repeat;
		2021	adjustheap (timers, timercnt, ev_active (w));
		2022	}
		2023	else
		2024	ev_timer_stop (EV_A_ w);
		2025	}
		2026	else if (w->repeat)
		2027	{
		2028	ev_at (w) = w->repeat;
		2029	ev_timer_start (EV_A_ w);
		2030	}
		2031	}
		2032
		2033	#if EV_PERIODIC_ENABLE
		2034	void noinline
		2035	ev_periodic_start (EV_P_ ev_periodic *w)
		2036	{
		2037	if (expect_false (ev_is_active (w)))
526	return;	2038	return;
527		2039
528	int fd = w->fd;	2040	if (w->reschedule_cb)
		2041	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2042	else if (w->interval)
		2043	{
		2044	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		2045	/* this formula differs from the one in periodic_reify because we do not always round up */
		2046	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2047	}
		2048	else
		2049	ev_at (w) = w->offset;
529		2050
530	ev_start ((struct ev_watcher *)w, 1);	2051	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
531	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	2052	array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
532	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	2053	periodics [ev_active (w)] = (WT)w;
		2054	upheap (periodics, ev_active (w));
533		2055
534	++fdchangecnt;	2056	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
535	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536	fdchanges [fdchangecnt - 1] = fd;
537	}	2057	}
538		2058
539	void	2059	void noinline
540	evio_stop (struct ev_io *w)	2060	ev_periodic_stop (EV_P_ ev_periodic *w)
541	{	2061	{
		2062	clear_pending (EV_A_ (W)w);
542	if (!ev_is_active (w))	2063	if (expect_false (!ev_is_active (w)))
543	return;	2064	return;
544		2065
545	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	2066	{
546	ev_stop ((struct ev_watcher *)w);	2067	int active = ev_active (w);
547		2068
548	++fdchangecnt;	2069	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
549	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550	fdchanges [fdchangecnt - 1] = w->fd;
551	}
552		2070
553	void	2071	if (expect_true (active < periodiccnt + HEAP0 - 1))
554	evtimer_start (struct ev_timer *w)	2072	{
		2073	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
		2074	adjustheap (periodics, periodiccnt, active);
		2075	}
		2076
		2077	--periodiccnt;
		2078	}
		2079
		2080	ev_stop (EV_A_ (W)w);
		2081	}
		2082
		2083	void noinline
		2084	ev_periodic_again (EV_P_ ev_periodic *w)
555	{	2085	{
		2086	/* TODO: use adjustheap and recalculation */
		2087	ev_periodic_stop (EV_A_ w);
		2088	ev_periodic_start (EV_A_ w);
		2089	}
		2090	#endif
		2091
		2092	#ifndef SA_RESTART
		2093	# define SA_RESTART 0
		2094	#endif
		2095
		2096	void noinline
		2097	ev_signal_start (EV_P_ ev_signal *w)
		2098	{
		2099	#if EV_MULTIPLICITY
		2100	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2101	#endif
556	if (ev_is_active (w))	2102	if (expect_false (ev_is_active (w)))
557	return;	2103	return;
558		2104
559	if (w->is_abs)	2105	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2106
		2107	evpipe_init (EV_A);
		2108
560	{	2109	{
561	/* this formula differs from the one in timer_reify becuse we do not round up */	2110	#ifndef _WIN32
562	if (w->repeat)	2111	sigset_t full, prev;
563	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	2112	sigfillset (&full);
		2113	sigprocmask (SIG_SETMASK, &full, &prev);
		2114	#endif
564		2115
565	ev_start ((struct ev_watcher *)w, ++atimercnt);	2116	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
566	array_needsize (atimers, atimermax, atimercnt, );	2117
567	atimers [atimercnt - 1] = w;	2118	#ifndef _WIN32
568	upheap (atimers, atimercnt - 1);	2119	sigprocmask (SIG_SETMASK, &prev, 0);
		2120	#endif
		2121	}
		2122
		2123	ev_start (EV_A_ (W)w, 1);
		2124	wlist_add (&signals [w->signum - 1].head, (WL)w);
		2125
		2126	if (!((WL)w)->next)
569	}	2127	{
570	else	2128	#if _WIN32
		2129	signal (w->signum, ev_sighandler);
		2130	#else
		2131	struct sigaction sa;
		2132	sa.sa_handler = ev_sighandler;
		2133	sigfillset (&sa.sa_mask);
		2134	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		2135	sigaction (w->signum, &sa, 0);
		2136	#endif
571	{	2137	}
572	w->at += now;
573
574	ev_start ((struct ev_watcher *)w, ++rtimercnt);
575	array_needsize (rtimers, rtimermax, rtimercnt, );
576	rtimers [rtimercnt - 1] = w;
577	upheap (rtimers, rtimercnt - 1);
578	}
579
580	}	2138	}
581		2139
582	void	2140	void noinline
583	evtimer_stop (struct ev_timer *w)	2141	ev_signal_stop (EV_P_ ev_signal *w)
584	{	2142	{
		2143	clear_pending (EV_A_ (W)w);
585	if (!ev_is_active (w))	2144	if (expect_false (!ev_is_active (w)))
586	return;	2145	return;
587		2146
588	if (w->is_abs)	2147	wlist_del (&signals [w->signum - 1].head, (WL)w);
589	{	2148	ev_stop (EV_A_ (W)w);
590	if (w->active < atimercnt--)
591	{
592	atimers [w->active - 1] = atimers [atimercnt];
593	downheap (atimers, atimercnt, w->active - 1);
594	}
595	}
596	else
597	{
598	if (w->active < rtimercnt--)
599	{
600	rtimers [w->active - 1] = rtimers [rtimercnt];
601	downheap (rtimers, rtimercnt, w->active - 1);
602	}
603	}
604
605	ev_stop ((struct ev_watcher *)w);
606	}
607
608	void
609	evsignal_start (struct ev_signal *w)
610	{
611	if (ev_is_active (w))
612	return;
613
614	ev_start ((struct ev_watcher *)w, 1);
615	array_needsize (signals, signalmax, w->signum, signals_init);
616	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);
617
618	if (!w->next)
619	{
620	struct sigaction sa;
621	sa.sa_handler = sighandler;
622	sigfillset (&sa.sa_mask);
623	sa.sa_flags = 0;
624	sigaction (w->signum, &sa, 0);
625	}
626	}
627
628	void
629	evsignal_stop (struct ev_signal *w)
630	{
631	if (!ev_is_active (w))
632	return;
633
634	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);
635	ev_stop ((struct ev_watcher *)w);
636		2149
637	if (!signals [w->signum - 1].head)	2150	if (!signals [w->signum - 1].head)
638	signal (w->signum, SIG_DFL);	2151	signal (w->signum, SIG_DFL);
639	}	2152	}
640		2153
		2154	void
		2155	ev_child_start (EV_P_ ev_child *w)
		2156	{
		2157	#if EV_MULTIPLICITY
		2158	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2159	#endif
		2160	if (expect_false (ev_is_active (w)))
		2161	return;
		2162
		2163	ev_start (EV_A_ (W)w, 1);
		2164	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2165	}
		2166
		2167	void
		2168	ev_child_stop (EV_P_ ev_child *w)
		2169	{
		2170	clear_pending (EV_A_ (W)w);
		2171	if (expect_false (!ev_is_active (w)))
		2172	return;
		2173
		2174	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2175	ev_stop (EV_A_ (W)w);
		2176	}
		2177
		2178	#if EV_STAT_ENABLE
		2179
		2180	# ifdef _WIN32
		2181	# undef lstat
		2182	# define lstat(a,b) _stati64 (a,b)
		2183	# endif
		2184
		2185	#define DEF_STAT_INTERVAL 5.0074891
		2186	#define MIN_STAT_INTERVAL 0.1074891
		2187
		2188	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2189
		2190	#if EV_USE_INOTIFY
		2191	# define EV_INOTIFY_BUFSIZE 8192
		2192
		2193	static void noinline
		2194	infy_add (EV_P_ ev_stat *w)
		2195	{
		2196	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);
		2197
		2198	if (w->wd < 0)
		2199	{
		2200	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2201
		2202	/* monitor some parent directory for speedup hints */
		2203	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2204	/* but an efficiency issue only */
		2205	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2206	{
		2207	char path [4096];
		2208	strcpy (path, w->path);
		2209
		2210	do
		2211	{
		2212	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2213	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2214
		2215	char *pend = strrchr (path, '/');
		2216
		2217	if (!pend)
		2218	break; /* whoops, no '/', complain to your admin */
		2219
		2220	*pend = 0;
		2221	w->wd = inotify_add_watch (fs_fd, path, mask);
		2222	}
		2223	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2224	}
		2225	}
		2226	else
		2227	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2228
		2229	if (w->wd >= 0)
		2230	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2231	}
		2232
		2233	static void noinline
		2234	infy_del (EV_P_ ev_stat *w)
		2235	{
		2236	int slot;
		2237	int wd = w->wd;
		2238
		2239	if (wd < 0)
		2240	return;
		2241
		2242	w->wd = -2;
		2243	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2244	wlist_del (&fs_hash [slot].head, (WL)w);
		2245
		2246	/* remove this watcher, if others are watching it, they will rearm */
		2247	inotify_rm_watch (fs_fd, wd);
		2248	}
		2249
		2250	static void noinline
		2251	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2252	{
		2253	if (slot < 0)
		2254	/* overflow, need to check for all hahs slots */
		2255	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2256	infy_wd (EV_A_ slot, wd, ev);
		2257	else
		2258	{
		2259	WL w_;
		2260
		2261	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2262	{
		2263	ev_stat *w = (ev_stat *)w_;
		2264	w_ = w_->next; /* lets us remove this watcher and all before it */
		2265
		2266	if (w->wd == wd || wd == -1)
		2267	{
		2268	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2269	{
		2270	w->wd = -1;
		2271	infy_add (EV_A_ w); /* re-add, no matter what */
		2272	}
		2273
		2274	stat_timer_cb (EV_A_ &w->timer, 0);
		2275	}
		2276	}
		2277	}
		2278	}
		2279
		2280	static void
		2281	infy_cb (EV_P_ ev_io *w, int revents)
		2282	{
		2283	char buf [EV_INOTIFY_BUFSIZE];
		2284	struct inotify_event *ev = (struct inotify_event *)buf;
		2285	int ofs;
		2286	int len = read (fs_fd, buf, sizeof (buf));
		2287
		2288	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2289	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2290	}
		2291
		2292	void inline_size
		2293	infy_init (EV_P)
		2294	{
		2295	if (fs_fd != -2)
		2296	return;
		2297
		2298	fs_fd = inotify_init ();
		2299
		2300	if (fs_fd >= 0)
		2301	{
		2302	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2303	ev_set_priority (&fs_w, EV_MAXPRI);
		2304	ev_io_start (EV_A_ &fs_w);
		2305	}
		2306	}
		2307
		2308	void inline_size
		2309	infy_fork (EV_P)
		2310	{
		2311	int slot;
		2312
		2313	if (fs_fd < 0)
		2314	return;
		2315
		2316	close (fs_fd);
		2317	fs_fd = inotify_init ();
		2318
		2319	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2320	{
		2321	WL w_ = fs_hash [slot].head;
		2322	fs_hash [slot].head = 0;
		2323
		2324	while (w_)
		2325	{
		2326	ev_stat *w = (ev_stat *)w_;
		2327	w_ = w_->next; /* lets us add this watcher */
		2328
		2329	w->wd = -1;
		2330
		2331	if (fs_fd >= 0)
		2332	infy_add (EV_A_ w); /* re-add, no matter what */
		2333	else
		2334	ev_timer_start (EV_A_ &w->timer);
		2335	}
		2336
		2337	}
		2338	}
		2339
		2340	#endif
		2341
		2342	void
		2343	ev_stat_stat (EV_P_ ev_stat *w)
		2344	{
		2345	if (lstat (w->path, &w->attr) < 0)
		2346	w->attr.st_nlink = 0;
		2347	else if (!w->attr.st_nlink)
		2348	w->attr.st_nlink = 1;
		2349	}
		2350
		2351	static void noinline
		2352	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2353	{
		2354	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2355
		2356	/* we copy this here each the time so that */
		2357	/* prev has the old value when the callback gets invoked */
		2358	w->prev = w->attr;
		2359	ev_stat_stat (EV_A_ w);
		2360
		2361	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2362	if (
		2363	w->prev.st_dev != w->attr.st_dev
		2364	|| w->prev.st_ino != w->attr.st_ino
		2365	|| w->prev.st_mode != w->attr.st_mode
		2366	|| w->prev.st_nlink != w->attr.st_nlink
		2367	|| w->prev.st_uid != w->attr.st_uid
		2368	|| w->prev.st_gid != w->attr.st_gid
		2369	|| w->prev.st_rdev != w->attr.st_rdev
		2370	|| w->prev.st_size != w->attr.st_size
		2371	|| w->prev.st_atime != w->attr.st_atime
		2372	|| w->prev.st_mtime != w->attr.st_mtime
		2373	|| w->prev.st_ctime != w->attr.st_ctime
		2374	) {
		2375	#if EV_USE_INOTIFY
		2376	infy_del (EV_A_ w);
		2377	infy_add (EV_A_ w);
		2378	ev_stat_stat (EV_A_ w); /* avoid race... */
		2379	#endif
		2380
		2381	ev_feed_event (EV_A_ w, EV_STAT);
		2382	}
		2383	}
		2384
		2385	void
		2386	ev_stat_start (EV_P_ ev_stat *w)
		2387	{
		2388	if (expect_false (ev_is_active (w)))
		2389	return;
		2390
		2391	/* since we use memcmp, we need to clear any padding data etc. */
		2392	memset (&w->prev, 0, sizeof (ev_statdata));
		2393	memset (&w->attr, 0, sizeof (ev_statdata));
		2394
		2395	ev_stat_stat (EV_A_ w);
		2396
		2397	if (w->interval < MIN_STAT_INTERVAL)
		2398	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2399
		2400	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2401	ev_set_priority (&w->timer, ev_priority (w));
		2402
		2403	#if EV_USE_INOTIFY
		2404	infy_init (EV_A);
		2405
		2406	if (fs_fd >= 0)
		2407	infy_add (EV_A_ w);
		2408	else
		2409	#endif
		2410	ev_timer_start (EV_A_ &w->timer);
		2411
		2412	ev_start (EV_A_ (W)w, 1);
		2413	}
		2414
		2415	void
		2416	ev_stat_stop (EV_P_ ev_stat *w)
		2417	{
		2418	clear_pending (EV_A_ (W)w);
		2419	if (expect_false (!ev_is_active (w)))
		2420	return;
		2421
		2422	#if EV_USE_INOTIFY
		2423	infy_del (EV_A_ w);
		2424	#endif
		2425	ev_timer_stop (EV_A_ &w->timer);
		2426
		2427	ev_stop (EV_A_ (W)w);
		2428	}
		2429	#endif
		2430
		2431	#if EV_IDLE_ENABLE
		2432	void
		2433	ev_idle_start (EV_P_ ev_idle *w)
		2434	{
		2435	if (expect_false (ev_is_active (w)))
		2436	return;
		2437
		2438	pri_adjust (EV_A_ (W)w);
		2439
		2440	{
		2441	int active = ++idlecnt [ABSPRI (w)];
		2442
		2443	++idleall;
		2444	ev_start (EV_A_ (W)w, active);
		2445
		2446	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2447	idles [ABSPRI (w)][active - 1] = w;
		2448	}
		2449	}
		2450
		2451	void
		2452	ev_idle_stop (EV_P_ ev_idle *w)
		2453	{
		2454	clear_pending (EV_A_ (W)w);
		2455	if (expect_false (!ev_is_active (w)))
		2456	return;
		2457
		2458	{
		2459	int active = ev_active (w);
		2460
		2461	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2462	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2463
		2464	ev_stop (EV_A_ (W)w);
		2465	--idleall;
		2466	}
		2467	}
		2468	#endif
		2469
		2470	void
		2471	ev_prepare_start (EV_P_ ev_prepare *w)
		2472	{
		2473	if (expect_false (ev_is_active (w)))
		2474	return;
		2475
		2476	ev_start (EV_A_ (W)w, ++preparecnt);
		2477	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2478	prepares [preparecnt - 1] = w;
		2479	}
		2480
		2481	void
		2482	ev_prepare_stop (EV_P_ ev_prepare *w)
		2483	{
		2484	clear_pending (EV_A_ (W)w);
		2485	if (expect_false (!ev_is_active (w)))
		2486	return;
		2487
		2488	{
		2489	int active = ev_active (w);
		2490
		2491	prepares [active - 1] = prepares [--preparecnt];
		2492	ev_active (prepares [active - 1]) = active;
		2493	}
		2494
		2495	ev_stop (EV_A_ (W)w);
		2496	}
		2497
		2498	void
		2499	ev_check_start (EV_P_ ev_check *w)
		2500	{
		2501	if (expect_false (ev_is_active (w)))
		2502	return;
		2503
		2504	ev_start (EV_A_ (W)w, ++checkcnt);
		2505	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2506	checks [checkcnt - 1] = w;
		2507	}
		2508
		2509	void
		2510	ev_check_stop (EV_P_ ev_check *w)
		2511	{
		2512	clear_pending (EV_A_ (W)w);
		2513	if (expect_false (!ev_is_active (w)))
		2514	return;
		2515
		2516	{
		2517	int active = ev_active (w);
		2518
		2519	checks [active - 1] = checks [--checkcnt];
		2520	ev_active (checks [active - 1]) = active;
		2521	}
		2522
		2523	ev_stop (EV_A_ (W)w);
		2524	}
		2525
		2526	#if EV_EMBED_ENABLE
		2527	void noinline
		2528	ev_embed_sweep (EV_P_ ev_embed *w)
		2529	{
		2530	ev_loop (w->other, EVLOOP_NONBLOCK);
		2531	}
		2532
		2533	static void
		2534	embed_io_cb (EV_P_ ev_io *io, int revents)
		2535	{
		2536	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2537
		2538	if (ev_cb (w))
		2539	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2540	else
		2541	ev_loop (w->other, EVLOOP_NONBLOCK);
		2542	}
		2543
		2544	static void
		2545	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2546	{
		2547	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2548
		2549	{
		2550	struct ev_loop *loop = w->other;
		2551
		2552	while (fdchangecnt)
		2553	{
		2554	fd_reify (EV_A);
		2555	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2556	}
		2557	}
		2558	}
		2559
		2560	#if 0
		2561	static void
		2562	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2563	{
		2564	ev_idle_stop (EV_A_ idle);
		2565	}
		2566	#endif
		2567
		2568	void
		2569	ev_embed_start (EV_P_ ev_embed *w)
		2570	{
		2571	if (expect_false (ev_is_active (w)))
		2572	return;
		2573
		2574	{
		2575	struct ev_loop *loop = w->other;
		2576	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2577	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2578	}
		2579
		2580	ev_set_priority (&w->io, ev_priority (w));
		2581	ev_io_start (EV_A_ &w->io);
		2582
		2583	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2584	ev_set_priority (&w->prepare, EV_MINPRI);
		2585	ev_prepare_start (EV_A_ &w->prepare);
		2586
		2587	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2588
		2589	ev_start (EV_A_ (W)w, 1);
		2590	}
		2591
		2592	void
		2593	ev_embed_stop (EV_P_ ev_embed *w)
		2594	{
		2595	clear_pending (EV_A_ (W)w);
		2596	if (expect_false (!ev_is_active (w)))
		2597	return;
		2598
		2599	ev_io_stop (EV_A_ &w->io);
		2600	ev_prepare_stop (EV_A_ &w->prepare);
		2601
		2602	ev_stop (EV_A_ (W)w);
		2603	}
		2604	#endif
		2605
		2606	#if EV_FORK_ENABLE
		2607	void
		2608	ev_fork_start (EV_P_ ev_fork *w)
		2609	{
		2610	if (expect_false (ev_is_active (w)))
		2611	return;
		2612
		2613	ev_start (EV_A_ (W)w, ++forkcnt);
		2614	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2615	forks [forkcnt - 1] = w;
		2616	}
		2617
		2618	void
		2619	ev_fork_stop (EV_P_ ev_fork *w)
		2620	{
		2621	clear_pending (EV_A_ (W)w);
		2622	if (expect_false (!ev_is_active (w)))
		2623	return;
		2624
		2625	{
		2626	int active = ev_active (w);
		2627
		2628	forks [active - 1] = forks [--forkcnt];
		2629	ev_active (forks [active - 1]) = active;
		2630	}
		2631
		2632	ev_stop (EV_A_ (W)w);
		2633	}
		2634	#endif
		2635
		2636	#if EV_ASYNC_ENABLE
		2637	void
		2638	ev_async_start (EV_P_ ev_async *w)
		2639	{
		2640	if (expect_false (ev_is_active (w)))
		2641	return;
		2642
		2643	evpipe_init (EV_A);
		2644
		2645	ev_start (EV_A_ (W)w, ++asynccnt);
		2646	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2647	asyncs [asynccnt - 1] = w;
		2648	}
		2649
		2650	void
		2651	ev_async_stop (EV_P_ ev_async *w)
		2652	{
		2653	clear_pending (EV_A_ (W)w);
		2654	if (expect_false (!ev_is_active (w)))
		2655	return;
		2656
		2657	{
		2658	int active = ev_active (w);
		2659
		2660	asyncs [active - 1] = asyncs [--asynccnt];
		2661	ev_active (asyncs [active - 1]) = active;
		2662	}
		2663
		2664	ev_stop (EV_A_ (W)w);
		2665	}
		2666
		2667	void
		2668	ev_async_send (EV_P_ ev_async *w)
		2669	{
		2670	w->sent = 1;
		2671	evpipe_write (EV_A_ &gotasync);
		2672	}
		2673	#endif
		2674
641	/*****************************************************************************/	2675	/*****************************************************************************/
642	#if 1	2676
		2677	struct ev_once
		2678	{
		2679	ev_io io;
		2680	ev_timer to;
		2681	void (*cb)(int revents, void *arg);
		2682	void *arg;
		2683	};
643		2684
644	static void	2685	static void
645	sin_cb (struct ev_io *w, int revents)	2686	once_cb (EV_P_ struct ev_once *once, int revents)
646	{	2687	{
647	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2688	void (*cb)(int revents, void *arg) = once->cb;
		2689	void *arg = once->arg;
		2690
		2691	ev_io_stop (EV_A_ &once->io);
		2692	ev_timer_stop (EV_A_ &once->to);
		2693	ev_free (once);
		2694
		2695	cb (revents, arg);
648	}	2696	}
649		2697
650	static void	2698	static void
651	ocb (struct ev_timer *w, int revents)	2699	once_cb_io (EV_P_ ev_io *w, int revents)
652	{	2700	{
653	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2701	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
654	evtimer_stop (w);
655	evtimer_start (w);
656	}	2702	}
657		2703
658	static void	2704	static void
659	scb (struct ev_signal *w, int revents)	2705	once_cb_to (EV_P_ ev_timer *w, int revents)
660	{	2706	{
661	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2707	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
662	}	2708	}
663		2709
664	int main (void)	2710	void
		2711	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
665	{	2712	{
666	struct ev_io sin;	2713	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
667		2714
668	ev_init (0);	2715	if (expect_false (!once))
669
670	evw_init (&sin, sin_cb, 55);
671	evio_set (&sin, 0, EV_READ);
672	evio_start (&sin);
673
674	struct ev_timer t[10000];
675
676	#if 0
677	int i;
678	for (i = 0; i < 10000; ++i)
679	{
680	struct ev_timer *w = t + i;
681	evw_init (w, ocb, i);
682	evtimer_set_abs (w, drand48 (), 0.99775533);
683	evtimer_start (w);
684	if (drand48 () < 0.5)
685	evtimer_stop (w);
686	}	2716	{
687	#endif	2717	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
688
689	struct ev_timer t1;
690	evw_init (&t1, ocb, 0);
691	evtimer_set_abs (&t1, 5, 10);
692	evtimer_start (&t1);
693
694	struct ev_signal sig;
695	evw_init (&sig, scb, 65535);
696	evsignal_set (&sig, SIGQUIT);
697	evsignal_start (&sig);
698
699	ev_loop (0);
700
701	return 0;	2718	return;
702	}	2719	}
703		2720
704	#endif	2721	once->cb = cb;
		2722	once->arg = arg;
705		2723
		2724	ev_init (&once->io, once_cb_io);
		2725	if (fd >= 0)
		2726	{
		2727	ev_io_set (&once->io, fd, events);
		2728	ev_io_start (EV_A_ &once->io);
		2729	}
706		2730
		2731	ev_init (&once->to, once_cb_to);
		2732	if (timeout >= 0.)
		2733	{
		2734	ev_timer_set (&once->to, timeout, 0.);
		2735	ev_timer_start (EV_A_ &once->to);
		2736	}
		2737	}
707		2738
		2739	#if EV_MULTIPLICITY
		2740	#include "ev_wrap.h"
		2741	#endif
708		2742
		2743	#ifdef __cplusplus
		2744	}
		2745	#endif
		2746

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