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Comparing libev/ev.c (file contents):
Revision 1.14 by root, Wed Oct 31 11:52:12 2007 UTC vs.
Revision 1.227 by root, Fri May 2 07:20:01 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
		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
39	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
40	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
41	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
42		329
43	static ev_tstamp now, diff; /* monotonic clock */	330	#if EV_USE_MONOTONIC
		331	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		332	/* giving it a reasonably high chance of working on typical architetcures */
		333	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		334	#endif
		335
		336	#ifdef _WIN32
		337	# include "ev_win32.c"
		338	#endif
		339
		340	/*****************************************************************************/
		341
		342	static void (*syserr_cb)(const char *msg);
		343
		344	void
		345	ev_set_syserr_cb (void (*cb)(const char *msg))
		346	{
		347	syserr_cb = cb;
		348	}
		349
		350	static void noinline
		351	syserr (const char *msg)
		352	{
		353	if (!msg)
		354	msg = "(libev) system error";
		355
		356	if (syserr_cb)
		357	syserr_cb (msg);
		358	else
		359	{
		360	perror (msg);
		361	abort ();
		362	}
		363	}
		364
		365	static void *
		366	ev_realloc_emul (void *ptr, long size)
		367	{
		368	/* some systems, notably openbsd and darwin, fail to properly
		369	* implement realloc (x, 0) (as required by both ansi c-98 and
		370	* the single unix specification, so work around them here.
		371	*/
		372
		373	if (size)
		374	return realloc (ptr, size);
		375
		376	free (ptr);
		377	return 0;
		378	}
		379
		380	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		381
		382	void
		383	ev_set_allocator (void *(*cb)(void *ptr, long size))
		384	{
		385	alloc = cb;
		386	}
		387
		388	inline_speed void *
		389	ev_realloc (void *ptr, long size)
		390	{
		391	ptr = alloc (ptr, size);
		392
		393	if (!ptr && size)
		394	{
		395	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		396	abort ();
		397	}
		398
		399	return ptr;
		400	}
		401
		402	#define ev_malloc(size) ev_realloc (0, (size))
		403	#define ev_free(ptr) ev_realloc ((ptr), 0)
		404
		405	/*****************************************************************************/
		406
		407	typedef struct
		408	{
		409	WL head;
		410	unsigned char events;
		411	unsigned char reify;
		412	#if EV_SELECT_IS_WINSOCKET
		413	SOCKET handle;
		414	#endif
		415	} ANFD;
		416
		417	typedef struct
		418	{
		419	W w;
		420	int events;
		421	} ANPENDING;
		422
		423	#if EV_USE_INOTIFY
		424	typedef struct
		425	{
		426	WL head;
		427	} ANFS;
		428	#endif
		429
		430	#if EV_MULTIPLICITY
		431
		432	struct ev_loop
		433	{
		434	ev_tstamp ev_rt_now;
		435	#define ev_rt_now ((loop)->ev_rt_now)
		436	#define VAR(name,decl) decl;
		437	#include "ev_vars.h"
		438	#undef VAR
		439	};
		440	#include "ev_wrap.h"
		441
		442	static struct ev_loop default_loop_struct;
		443	struct ev_loop *ev_default_loop_ptr;
		444
		445	#else
		446
44	ev_tstamp ev_now;	447	ev_tstamp ev_rt_now;
45	int ev_method;	448	#define VAR(name,decl) static decl;
		449	#include "ev_vars.h"
		450	#undef VAR
46		451
47	static int have_monotonic; /* runtime */	452	static int ev_default_loop_ptr;
48		453
49	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	454	#endif
50	static void (*method_modify)(int fd, int oev, int nev);
51	static void (*method_poll)(ev_tstamp timeout);
52		455
53	/*****************************************************************************/	456	/*****************************************************************************/
54		457
55	ev_tstamp	458	ev_tstamp
56	ev_time (void)	459	ev_time (void)
57	{	460	{
58	#if HAVE_REALTIME	461	#if EV_USE_REALTIME
59	struct timespec ts;	462	struct timespec ts;
60	clock_gettime (CLOCK_REALTIME, &ts);	463	clock_gettime (CLOCK_REALTIME, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	464	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	#else	465	#else
63	struct timeval tv;	466	struct timeval tv;
64	gettimeofday (&tv, 0);	467	gettimeofday (&tv, 0);
65	return tv.tv_sec + tv.tv_usec * 1e-6;	468	return tv.tv_sec + tv.tv_usec * 1e-6;
66	#endif	469	#endif
67	}	470	}
68		471
69	static ev_tstamp	472	ev_tstamp inline_size
70	get_clock (void)	473	get_clock (void)
71	{	474	{
72	#if HAVE_MONOTONIC	475	#if EV_USE_MONOTONIC
73	if (have_monotonic)	476	if (expect_true (have_monotonic))
74	{	477	{
75	struct timespec ts;	478	struct timespec ts;
76	clock_gettime (CLOCK_MONOTONIC, &ts);	479	clock_gettime (CLOCK_MONOTONIC, &ts);
77	return ts.tv_sec + ts.tv_nsec * 1e-9;	480	return ts.tv_sec + ts.tv_nsec * 1e-9;
78	}	481	}
79	#endif	482	#endif
80		483
81	return ev_time ();	484	return ev_time ();
82	}	485	}
83		486
84	#define array_needsize(base,cur,cnt,init) \	487	#if EV_MULTIPLICITY
85	if ((cnt) > cur) \	488	ev_tstamp
86	{ \	489	ev_now (EV_P)
87	int newcnt = cur ? cur << 1 : 16; \	490	{
88	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	491	return ev_rt_now;
89	base = realloc (base, sizeof (*base) * (newcnt)); \	492	}
90	init (base + cur, newcnt - cur); \	493	#endif
91	cur = newcnt; \	494
		495	void
		496	ev_sleep (ev_tstamp delay)
		497	{
		498	if (delay > 0.)
92	}	499	{
		500	#if EV_USE_NANOSLEEP
		501	struct timespec ts;
		502
		503	ts.tv_sec = (time_t)delay;
		504	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		505
		506	nanosleep (&ts, 0);
		507	#elif defined(_WIN32)
		508	Sleep ((unsigned long)(delay * 1e3));
		509	#else
		510	struct timeval tv;
		511
		512	tv.tv_sec = (time_t)delay;
		513	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		514
		515	select (0, 0, 0, 0, &tv);
		516	#endif
		517	}
		518	}
93		519
94	/*****************************************************************************/	520	/*****************************************************************************/
95		521
		522	int inline_size
		523	array_nextsize (int elem, int cur, int cnt)
		524	{
		525	int ncur = cur + 1;
		526
		527	do
		528	ncur <<= 1;
		529	while (cnt > ncur);
		530
		531	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		532	if (elem * ncur > 4096)
		533	{
		534	ncur *= elem;
		535	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		536	ncur = ncur - sizeof (void *) * 4;
		537	ncur /= elem;
		538	}
		539
		540	return ncur;
		541	}
		542
		543	static noinline void *
		544	array_realloc (int elem, void *base, int *cur, int cnt)
		545	{
		546	*cur = array_nextsize (elem, *cur, cnt);
		547	return ev_realloc (base, elem * *cur);
		548	}
		549
		550	#define array_needsize(type,base,cur,cnt,init) \
		551	if (expect_false ((cnt) > (cur))) \
		552	{ \
		553	int ocur_ = (cur); \
		554	(base) = (type *)array_realloc \
		555	(sizeof (type), (base), &(cur), (cnt)); \
		556	init ((base) + (ocur_), (cur) - ocur_); \
		557	}
		558
		559	#if 0
		560	#define array_slim(type,stem) \
		561	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		562	{ \
		563	stem ## max = array_roundsize (stem ## cnt >> 1); \
		564	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		565	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		566	}
		567	#endif
		568
		569	#define array_free(stem, idx) \
		570	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		571
		572	/*****************************************************************************/
		573
		574	void noinline
		575	ev_feed_event (EV_P_ void *w, int revents)
		576	{
		577	W w_ = (W)w;
		578	int pri = ABSPRI (w_);
		579
		580	if (expect_false (w_->pending))
		581	pendings [pri][w_->pending - 1].events |= revents;
		582	else
		583	{
		584	w_->pending = ++pendingcnt [pri];
		585	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		586	pendings [pri][w_->pending - 1].w = w_;
		587	pendings [pri][w_->pending - 1].events = revents;
		588	}
		589	}
		590
		591	void inline_speed
		592	queue_events (EV_P_ W *events, int eventcnt, int type)
		593	{
		594	int i;
		595
		596	for (i = 0; i < eventcnt; ++i)
		597	ev_feed_event (EV_A_ events [i], type);
		598	}
		599
		600	/*****************************************************************************/
		601
		602	void inline_size
		603	anfds_init (ANFD *base, int count)
		604	{
		605	while (count--)
		606	{
		607	base->head = 0;
		608	base->events = EV_NONE;
		609	base->reify = 0;
		610
		611	++base;
		612	}
		613	}
		614
		615	void inline_speed
		616	fd_event (EV_P_ int fd, int revents)
		617	{
		618	ANFD *anfd = anfds + fd;
		619	ev_io *w;
		620
		621	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		622	{
		623	int ev = w->events & revents;
		624
		625	if (ev)
		626	ev_feed_event (EV_A_ (W)w, ev);
		627	}
		628	}
		629
		630	void
		631	ev_feed_fd_event (EV_P_ int fd, int revents)
		632	{
		633	if (fd >= 0 && fd < anfdmax)
		634	fd_event (EV_A_ fd, revents);
		635	}
		636
		637	void inline_size
		638	fd_reify (EV_P)
		639	{
		640	int i;
		641
		642	for (i = 0; i < fdchangecnt; ++i)
		643	{
		644	int fd = fdchanges [i];
		645	ANFD *anfd = anfds + fd;
		646	ev_io *w;
		647
		648	unsigned char events = 0;
		649
		650	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		651	events |= (unsigned char)w->events;
		652
		653	#if EV_SELECT_IS_WINSOCKET
		654	if (events)
		655	{
		656	unsigned long argp;
		657	#ifdef EV_FD_TO_WIN32_HANDLE
		658	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		659	#else
		660	anfd->handle = _get_osfhandle (fd);
		661	#endif
		662	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		663	}
		664	#endif
		665
		666	{
		667	unsigned char o_events = anfd->events;
		668	unsigned char o_reify = anfd->reify;
		669
		670	anfd->reify = 0;
		671	anfd->events = events;
		672
		673	if (o_events != events || o_reify & EV_IOFDSET)
		674	backend_modify (EV_A_ fd, o_events, events);
		675	}
		676	}
		677
		678	fdchangecnt = 0;
		679	}
		680
		681	void inline_size
		682	fd_change (EV_P_ int fd, int flags)
		683	{
		684	unsigned char reify = anfds [fd].reify;
		685	anfds [fd].reify |= flags;
		686
		687	if (expect_true (!reify))
		688	{
		689	++fdchangecnt;
		690	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		691	fdchanges [fdchangecnt - 1] = fd;
		692	}
		693	}
		694
		695	void inline_speed
		696	fd_kill (EV_P_ int fd)
		697	{
		698	ev_io *w;
		699
		700	while ((w = (ev_io *)anfds [fd].head))
		701	{
		702	ev_io_stop (EV_A_ w);
		703	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		704	}
		705	}
		706
		707	int inline_size
		708	fd_valid (int fd)
		709	{
		710	#ifdef _WIN32
		711	return _get_osfhandle (fd) != -1;
		712	#else
		713	return fcntl (fd, F_GETFD) != -1;
		714	#endif
		715	}
		716
		717	/* called on EBADF to verify fds */
		718	static void noinline
		719	fd_ebadf (EV_P)
		720	{
		721	int fd;
		722
		723	for (fd = 0; fd < anfdmax; ++fd)
		724	if (anfds [fd].events)
		725	if (!fd_valid (fd) == -1 && errno == EBADF)
		726	fd_kill (EV_A_ fd);
		727	}
		728
		729	/* called on ENOMEM in select/poll to kill some fds and retry */
		730	static void noinline
		731	fd_enomem (EV_P)
		732	{
		733	int fd;
		734
		735	for (fd = anfdmax; fd--; )
		736	if (anfds [fd].events)
		737	{
		738	fd_kill (EV_A_ fd);
		739	return;
		740	}
		741	}
		742
		743	/* usually called after fork if backend needs to re-arm all fds from scratch */
		744	static void noinline
		745	fd_rearm_all (EV_P)
		746	{
		747	int fd;
		748
		749	for (fd = 0; fd < anfdmax; ++fd)
		750	if (anfds [fd].events)
		751	{
		752	anfds [fd].events = 0;
		753	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		754	}
		755	}
		756
		757	/*****************************************************************************/
		758
		759	/* towards the root */
		760	void inline_speed
		761	upheap (WT *heap, int k)
		762	{
		763	WT w = heap [k];
		764
		765	while (k)
		766	{
		767	int p = (k - 1) >> 1;
		768
		769	if (heap [p]->at <= w->at)
		770	break;
		771
		772	heap [k] = heap [p];
		773	((W)heap [k])->active = k + 1;
		774	k = p;
		775	}
		776
		777	heap [k] = w;
		778	((W)heap [k])->active = k + 1;
		779	}
		780
		781	/* away from the root */
		782	void inline_speed
		783	downheap (WT *heap, int N, int k)
		784	{
		785	WT w = heap [k];
		786
		787	for (;;)
		788	{
		789	int c = (k << 1) + 1;
		790
		791	if (c >= N)
		792	break;
		793
		794	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		795	? 1 : 0;
		796
		797	if (w->at <= heap [c]->at)
		798	break;
		799
		800	heap [k] = heap [c];
		801	((W)heap [k])->active = k + 1;
		802
		803	k = c;
		804	}
		805
		806	heap [k] = w;
		807	((W)heap [k])->active = k + 1;
		808	}
		809
		810	void inline_size
		811	adjustheap (WT *heap, int N, int k)
		812	{
		813	upheap (heap, k);
		814	downheap (heap, N, k);
		815	}
		816
		817	/*****************************************************************************/
		818
96	typedef struct	819	typedef struct
97	{	820	{
98	struct ev_io *head;	821	WL head;
99	unsigned char wev, rev; /* want, received event set */	822	EV_ATOMIC_T gotsig;
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void
109	anfds_init (ANFD *base, int count)
110	{
111	while (count--)
112	{
113	base->head = 0;
114	base->wev = base->rev = EV_NONE;
115	++base;
116	}
117	}
118
119	typedef struct
120	{
121	W w;
122	int events;
123	} ANPENDING;
124
125	static ANPENDING *pendings;
126	static int pendingmax, pendingcnt;
127
128	static void
129	event (W w, int events)
130	{
131	w->pending = ++pendingcnt;
132	array_needsize (pendings, pendingmax, pendingcnt, );
133	pendings [pendingcnt - 1].w = w;
134	pendings [pendingcnt - 1].events = events;
135	}
136
137	static void
138	fd_event (int fd, int events)
139	{
140	ANFD *anfd = anfds + fd;
141	struct ev_io *w;
142
143	for (w = anfd->head; w; w = w->next)
144	{
145	int ev = w->events & events;
146
147	if (ev)
148	event ((W)w, ev);
149	}
150	}
151
152	static void
153	queue_events (W *events, int eventcnt, int type)
154	{
155	int i;
156
157	for (i = 0; i < eventcnt; ++i)
158	event (events [i], type);
159	}
160
161	/*****************************************************************************/
162
163	static struct ev_timer **timers;
164	static int timermax, timercnt;
165
166	static struct ev_periodic **periodics;
167	static int periodicmax, periodiccnt;
168
169	static void
170	upheap (WT *timers, int k)
171	{
172	WT w = timers [k];
173
174	while (k && timers [k >> 1]->at > w->at)
175	{
176	timers [k] = timers [k >> 1];
177	timers [k]->active = k + 1;
178	k >>= 1;
179	}
180
181	timers [k] = w;
182	timers [k]->active = k + 1;
183
184	}
185
186	static void
187	downheap (WT *timers, int N, int k)
188	{
189	WT w = timers [k];
190
191	while (k < (N >> 1))
192	{
193	int j = k << 1;
194
195	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
196	++j;
197
198	if (w->at <= timers [j]->at)
199	break;
200
201	timers [k] = timers [j];
202	timers [k]->active = k + 1;
203	k = j;
204	}
205
206	timers [k] = w;
207	timers [k]->active = k + 1;
208	}
209
210	/*****************************************************************************/
211
212	typedef struct
213	{
214	struct ev_signal *head;
215	sig_atomic_t gotsig;
216	} ANSIG;	823	} ANSIG;
217		824
218	static ANSIG *signals;	825	static ANSIG *signals;
219	static int signalmax;	826	static int signalmax;
220		827
221	static int sigpipe [2];	828	static EV_ATOMIC_T gotsig;
222	static sig_atomic_t gotsig;
223	static struct ev_io sigev;
224		829
225	static void	830	void inline_size
226	signals_init (ANSIG *base, int count)	831	signals_init (ANSIG *base, int count)
227	{	832	{
228	while (count--)	833	while (count--)
229	{	834	{
230	base->head = 0;	835	base->head = 0;
231	base->gotsig = 0;	836	base->gotsig = 0;
		837
232	++base;	838	++base;
233	}	839	}
234	}	840	}
235		841
		842	/*****************************************************************************/
		843
		844	void inline_speed
		845	fd_intern (int fd)
		846	{
		847	#ifdef _WIN32
		848	int arg = 1;
		849	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		850	#else
		851	fcntl (fd, F_SETFD, FD_CLOEXEC);
		852	fcntl (fd, F_SETFL, O_NONBLOCK);
		853	#endif
		854	}
		855
		856	static void noinline
		857	evpipe_init (EV_P)
		858	{
		859	if (!ev_is_active (&pipeev))
		860	{
		861	#if EV_USE_EVENTFD
		862	if ((evfd = eventfd (0, 0)) >= 0)
		863	{
		864	evpipe [0] = -1;
		865	fd_intern (evfd);
		866	ev_io_set (&pipeev, evfd, EV_READ);
		867	}
		868	else
		869	#endif
		870	{
		871	while (pipe (evpipe))
		872	syserr ("(libev) error creating signal/async pipe");
		873
		874	fd_intern (evpipe [0]);
		875	fd_intern (evpipe [1]);
		876	ev_io_set (&pipeev, evpipe [0], EV_READ);
		877	}
		878
		879	ev_io_start (EV_A_ &pipeev);
		880	ev_unref (EV_A); /* watcher should not keep loop alive */
		881	}
		882	}
		883
		884	void inline_size
		885	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		886	{
		887	if (!*flag)
		888	{
		889	int old_errno = errno; /* save errno because write might clobber it */
		890
		891	*flag = 1;
		892
		893	#if EV_USE_EVENTFD
		894	if (evfd >= 0)
		895	{
		896	uint64_t counter = 1;
		897	write (evfd, &counter, sizeof (uint64_t));
		898	}
		899	else
		900	#endif
		901	write (evpipe [1], &old_errno, 1);
		902
		903	errno = old_errno;
		904	}
		905	}
		906
236	static void	907	static void
		908	pipecb (EV_P_ ev_io *iow, int revents)
		909	{
		910	#if EV_USE_EVENTFD
		911	if (evfd >= 0)
		912	{
		913	uint64_t counter = 1;
		914	read (evfd, &counter, sizeof (uint64_t));
		915	}
		916	else
		917	#endif
		918	{
		919	char dummy;
		920	read (evpipe [0], &dummy, 1);
		921	}
		922
		923	if (gotsig && ev_is_default_loop (EV_A))
		924	{
		925	int signum;
		926	gotsig = 0;
		927
		928	for (signum = signalmax; signum--; )
		929	if (signals [signum].gotsig)
		930	ev_feed_signal_event (EV_A_ signum + 1);
		931	}
		932
		933	#if EV_ASYNC_ENABLE
		934	if (gotasync)
		935	{
		936	int i;
		937	gotasync = 0;
		938
		939	for (i = asynccnt; i--; )
		940	if (asyncs [i]->sent)
		941	{
		942	asyncs [i]->sent = 0;
		943	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		944	}
		945	}
		946	#endif
		947	}
		948
		949	/*****************************************************************************/
		950
		951	static void
237	sighandler (int signum)	952	ev_sighandler (int signum)
238	{	953	{
		954	#if EV_MULTIPLICITY
		955	struct ev_loop *loop = &default_loop_struct;
		956	#endif
		957
		958	#if _WIN32
		959	signal (signum, ev_sighandler);
		960	#endif
		961
239	signals [signum - 1].gotsig = 1;	962	signals [signum - 1].gotsig = 1;
		963	evpipe_write (EV_A_ &gotsig);
		964	}
240		965
241	if (!gotsig)	966	void noinline
		967	ev_feed_signal_event (EV_P_ int signum)
		968	{
		969	WL w;
		970
		971	#if EV_MULTIPLICITY
		972	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		973	#endif
		974
		975	--signum;
		976
		977	if (signum < 0 || signum >= signalmax)
		978	return;
		979
		980	signals [signum].gotsig = 0;
		981
		982	for (w = signals [signum].head; w; w = w->next)
		983	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		984	}
		985
		986	/*****************************************************************************/
		987
		988	static WL childs [EV_PID_HASHSIZE];
		989
		990	#ifndef _WIN32
		991
		992	static ev_signal childev;
		993
		994	#ifndef WIFCONTINUED
		995	# define WIFCONTINUED(status) 0
		996	#endif
		997
		998	void inline_speed
		999	child_reap (EV_P_ int chain, int pid, int status)
		1000	{
		1001	ev_child *w;
		1002	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1003
		1004	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1005	{
		1006	if ((w->pid == pid || !w->pid)
		1007	&& (!traced || (w->flags & 1)))
		1008	{
		1009	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1010	w->rpid = pid;
		1011	w->rstatus = status;
		1012	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1013	}
		1014	}
		1015	}
		1016
		1017	#ifndef WCONTINUED
		1018	# define WCONTINUED 0
		1019	#endif
		1020
		1021	static void
		1022	childcb (EV_P_ ev_signal *sw, int revents)
		1023	{
		1024	int pid, status;
		1025
		1026	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1027	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		1028	if (!WCONTINUED
		1029	|| errno != EINVAL
		1030	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1031	return;
		1032
		1033	/* make sure we are called again until all children have been reaped */
		1034	/* we need to do it this way so that the callback gets called before we continue */
		1035	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1036
		1037	child_reap (EV_A_ pid, pid, status);
		1038	if (EV_PID_HASHSIZE > 1)
		1039	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1040	}
		1041
		1042	#endif
		1043
		1044	/*****************************************************************************/
		1045
		1046	#if EV_USE_PORT
		1047	# include "ev_port.c"
		1048	#endif
		1049	#if EV_USE_KQUEUE
		1050	# include "ev_kqueue.c"
		1051	#endif
		1052	#if EV_USE_EPOLL
		1053	# include "ev_epoll.c"
		1054	#endif
		1055	#if EV_USE_POLL
		1056	# include "ev_poll.c"
		1057	#endif
		1058	#if EV_USE_SELECT
		1059	# include "ev_select.c"
		1060	#endif
		1061
		1062	int
		1063	ev_version_major (void)
		1064	{
		1065	return EV_VERSION_MAJOR;
		1066	}
		1067
		1068	int
		1069	ev_version_minor (void)
		1070	{
		1071	return EV_VERSION_MINOR;
		1072	}
		1073
		1074	/* return true if we are running with elevated privileges and should ignore env variables */
		1075	int inline_size
		1076	enable_secure (void)
		1077	{
		1078	#ifdef _WIN32
		1079	return 0;
		1080	#else
		1081	return getuid () != geteuid ()
		1082	|| getgid () != getegid ();
		1083	#endif
		1084	}
		1085
		1086	unsigned int
		1087	ev_supported_backends (void)
		1088	{
		1089	unsigned int flags = 0;
		1090
		1091	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1092	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1093	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1094	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1095	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1096
		1097	return flags;
		1098	}
		1099
		1100	unsigned int
		1101	ev_recommended_backends (void)
		1102	{
		1103	unsigned int flags = ev_supported_backends ();
		1104
		1105	#ifndef __NetBSD__
		1106	/* kqueue is borked on everything but netbsd apparently */
		1107	/* it usually doesn't work correctly on anything but sockets and pipes */
		1108	flags &= ~EVBACKEND_KQUEUE;
		1109	#endif
		1110	#ifdef __APPLE__
		1111	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1112	flags &= ~EVBACKEND_POLL;
		1113	#endif
		1114
		1115	return flags;
		1116	}
		1117
		1118	unsigned int
		1119	ev_embeddable_backends (void)
		1120	{
		1121	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1122
		1123	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1124	/* please fix it and tell me how to detect the fix */
		1125	flags &= ~EVBACKEND_EPOLL;
		1126
		1127	return flags;
		1128	}
		1129
		1130	unsigned int
		1131	ev_backend (EV_P)
		1132	{
		1133	return backend;
		1134	}
		1135
		1136	unsigned int
		1137	ev_loop_count (EV_P)
		1138	{
		1139	return loop_count;
		1140	}
		1141
		1142	void
		1143	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1144	{
		1145	io_blocktime = interval;
		1146	}
		1147
		1148	void
		1149	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1150	{
		1151	timeout_blocktime = interval;
		1152	}
		1153
		1154	static void noinline
		1155	loop_init (EV_P_ unsigned int flags)
		1156	{
		1157	if (!backend)
		1158	{
		1159	#if EV_USE_MONOTONIC
242	{	1160	{
		1161	struct timespec ts;
		1162	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1163	have_monotonic = 1;
		1164	}
		1165	#endif
		1166
		1167	ev_rt_now = ev_time ();
		1168	mn_now = get_clock ();
		1169	now_floor = mn_now;
		1170	rtmn_diff = ev_rt_now - mn_now;
		1171
		1172	io_blocktime = 0.;
		1173	timeout_blocktime = 0.;
		1174	backend = 0;
		1175	backend_fd = -1;
		1176	gotasync = 0;
		1177	#if EV_USE_INOTIFY
		1178	fs_fd = -2;
		1179	#endif
		1180
		1181	/* pid check not overridable via env */
		1182	#ifndef _WIN32
		1183	if (flags & EVFLAG_FORKCHECK)
		1184	curpid = getpid ();
		1185	#endif
		1186
		1187	if (!(flags & EVFLAG_NOENV)
		1188	&& !enable_secure ()
		1189	&& getenv ("LIBEV_FLAGS"))
		1190	flags = atoi (getenv ("LIBEV_FLAGS"));
		1191
		1192	if (!(flags & 0x0000ffffU))
		1193	flags |= ev_recommended_backends ();
		1194
		1195	#if EV_USE_PORT
		1196	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1197	#endif
		1198	#if EV_USE_KQUEUE
		1199	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1200	#endif
		1201	#if EV_USE_EPOLL
		1202	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1203	#endif
		1204	#if EV_USE_POLL
		1205	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1206	#endif
		1207	#if EV_USE_SELECT
		1208	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1209	#endif
		1210
		1211	ev_init (&pipeev, pipecb);
		1212	ev_set_priority (&pipeev, EV_MAXPRI);
		1213	}
		1214	}
		1215
		1216	static void noinline
		1217	loop_destroy (EV_P)
		1218	{
		1219	int i;
		1220
		1221	if (ev_is_active (&pipeev))
		1222	{
		1223	ev_ref (EV_A); /* signal watcher */
		1224	ev_io_stop (EV_A_ &pipeev);
		1225
		1226	#if EV_USE_EVENTFD
		1227	if (evfd >= 0)
		1228	close (evfd);
		1229	#endif
		1230
		1231	if (evpipe [0] >= 0)
		1232	{
		1233	close (evpipe [0]);
		1234	close (evpipe [1]);
		1235	}
		1236	}
		1237
		1238	#if EV_USE_INOTIFY
		1239	if (fs_fd >= 0)
		1240	close (fs_fd);
		1241	#endif
		1242
		1243	if (backend_fd >= 0)
		1244	close (backend_fd);
		1245
		1246	#if EV_USE_PORT
		1247	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1248	#endif
		1249	#if EV_USE_KQUEUE
		1250	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1251	#endif
		1252	#if EV_USE_EPOLL
		1253	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1254	#endif
		1255	#if EV_USE_POLL
		1256	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1257	#endif
		1258	#if EV_USE_SELECT
		1259	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1260	#endif
		1261
		1262	for (i = NUMPRI; i--; )
		1263	{
		1264	array_free (pending, [i]);
		1265	#if EV_IDLE_ENABLE
		1266	array_free (idle, [i]);
		1267	#endif
		1268	}
		1269
		1270	ev_free (anfds); anfdmax = 0;
		1271
		1272	/* have to use the microsoft-never-gets-it-right macro */
		1273	array_free (fdchange, EMPTY);
		1274	array_free (timer, EMPTY);
		1275	#if EV_PERIODIC_ENABLE
		1276	array_free (periodic, EMPTY);
		1277	#endif
		1278	#if EV_FORK_ENABLE
		1279	array_free (fork, EMPTY);
		1280	#endif
		1281	array_free (prepare, EMPTY);
		1282	array_free (check, EMPTY);
		1283	#if EV_ASYNC_ENABLE
		1284	array_free (async, EMPTY);
		1285	#endif
		1286
		1287	backend = 0;
		1288	}
		1289
		1290	#if EV_USE_INOTIFY
		1291	void inline_size infy_fork (EV_P);
		1292	#endif
		1293
		1294	void inline_size
		1295	loop_fork (EV_P)
		1296	{
		1297	#if EV_USE_PORT
		1298	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1299	#endif
		1300	#if EV_USE_KQUEUE
		1301	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1302	#endif
		1303	#if EV_USE_EPOLL
		1304	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1305	#endif
		1306	#if EV_USE_INOTIFY
		1307	infy_fork (EV_A);
		1308	#endif
		1309
		1310	if (ev_is_active (&pipeev))
		1311	{
		1312	/* this "locks" the handlers against writing to the pipe */
		1313	/* while we modify the fd vars */
243	gotsig = 1;	1314	gotsig = 1;
244	write (sigpipe [1], &gotsig, 1);	1315	#if EV_ASYNC_ENABLE
		1316	gotasync = 1;
		1317	#endif
		1318
		1319	ev_ref (EV_A);
		1320	ev_io_stop (EV_A_ &pipeev);
		1321
		1322	#if EV_USE_EVENTFD
		1323	if (evfd >= 0)
		1324	close (evfd);
		1325	#endif
		1326
		1327	if (evpipe [0] >= 0)
		1328	{
		1329	close (evpipe [0]);
		1330	close (evpipe [1]);
		1331	}
		1332
		1333	evpipe_init (EV_A);
		1334	/* now iterate over everything, in case we missed something */
		1335	pipecb (EV_A_ &pipeev, EV_READ);
		1336	}
		1337
		1338	postfork = 0;
		1339	}
		1340
		1341	#if EV_MULTIPLICITY
		1342	struct ev_loop *
		1343	ev_loop_new (unsigned int flags)
		1344	{
		1345	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1346
		1347	memset (loop, 0, sizeof (struct ev_loop));
		1348
		1349	loop_init (EV_A_ flags);
		1350
		1351	if (ev_backend (EV_A))
		1352	return loop;
		1353
		1354	return 0;
		1355	}
		1356
		1357	void
		1358	ev_loop_destroy (EV_P)
		1359	{
		1360	loop_destroy (EV_A);
		1361	ev_free (loop);
		1362	}
		1363
		1364	void
		1365	ev_loop_fork (EV_P)
		1366	{
		1367	postfork = 1; /* must be in line with ev_default_fork */
		1368	}
		1369
		1370	#endif
		1371
		1372	#if EV_MULTIPLICITY
		1373	struct ev_loop *
		1374	ev_default_loop_init (unsigned int flags)
		1375	#else
		1376	int
		1377	ev_default_loop (unsigned int flags)
		1378	#endif
		1379	{
		1380	if (!ev_default_loop_ptr)
245	}	1381	{
246	}	1382	#if EV_MULTIPLICITY
		1383	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1384	#else
		1385	ev_default_loop_ptr = 1;
		1386	#endif
247		1387
248	static void	1388	loop_init (EV_A_ flags);
249	sigcb (struct ev_io *iow, int revents)	1389
		1390	if (ev_backend (EV_A))
		1391	{
		1392	#ifndef _WIN32
		1393	ev_signal_init (&childev, childcb, SIGCHLD);
		1394	ev_set_priority (&childev, EV_MAXPRI);
		1395	ev_signal_start (EV_A_ &childev);
		1396	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1397	#endif
		1398	}
		1399	else
		1400	ev_default_loop_ptr = 0;
		1401	}
		1402
		1403	return ev_default_loop_ptr;
		1404	}
		1405
		1406	void
		1407	ev_default_destroy (void)
250	{	1408	{
251	struct ev_signal *w;	1409	#if EV_MULTIPLICITY
		1410	struct ev_loop *loop = ev_default_loop_ptr;
		1411	#endif
		1412
		1413	#ifndef _WIN32
		1414	ev_ref (EV_A); /* child watcher */
		1415	ev_signal_stop (EV_A_ &childev);
		1416	#endif
		1417
		1418	loop_destroy (EV_A);
		1419	}
		1420
		1421	void
		1422	ev_default_fork (void)
		1423	{
		1424	#if EV_MULTIPLICITY
		1425	struct ev_loop *loop = ev_default_loop_ptr;
		1426	#endif
		1427
		1428	if (backend)
		1429	postfork = 1; /* must be in line with ev_loop_fork */
		1430	}
		1431
		1432	/*****************************************************************************/
		1433
		1434	void
		1435	ev_invoke (EV_P_ void *w, int revents)
		1436	{
		1437	EV_CB_INVOKE ((W)w, revents);
		1438	}
		1439
		1440	void inline_speed
		1441	call_pending (EV_P)
		1442	{
252	int sig;	1443	int pri;
253		1444
254	gotsig = 0;	1445	for (pri = NUMPRI; pri--; )
255	read (sigpipe [0], &revents, 1);	1446	while (pendingcnt [pri])
256
257	for (sig = signalmax; sig--; )
258	if (signals [sig].gotsig)
259	{	1447	{
260	signals [sig].gotsig = 0;	1448	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
261		1449
262	for (w = signals [sig].head; w; w = w->next)	1450	if (expect_true (p->w))
263	event ((W)w, EV_SIGNAL);	1451	{
		1452	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1453
		1454	p->w->pending = 0;
		1455	EV_CB_INVOKE (p->w, p->events);
		1456	}
264	}	1457	}
265	}	1458	}
266		1459
267	static void	1460	void inline_size
268	siginit (void)
269	{
270	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
271	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272
273	/* rather than sort out wether we really need nb, set it */
274	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
275	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
276
277	evio_set (&sigev, sigpipe [0], EV_READ);
278	evio_start (&sigev);
279	}
280
281	/*****************************************************************************/
282
283	static struct ev_idle **idles;
284	static int idlemax, idlecnt;
285
286	static struct ev_check **checks;
287	static int checkmax, checkcnt;
288
289	/*****************************************************************************/
290
291	#if HAVE_EPOLL
292	# include "ev_epoll.c"
293	#endif
294	#if HAVE_SELECT
295	# include "ev_select.c"
296	#endif
297
298	int ev_init (int flags)
299	{
300	#if HAVE_MONOTONIC
301	{
302	struct timespec ts;
303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304	have_monotonic = 1;
305	}
306	#endif
307
308	ev_now = ev_time ();
309	now = get_clock ();
310	diff = ev_now - now;
311
312	if (pipe (sigpipe))
313	return 0;
314
315	ev_method = EVMETHOD_NONE;
316	#if HAVE_EPOLL
317	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
318	#endif
319	#if HAVE_SELECT
320	if (ev_method == EVMETHOD_NONE) select_init (flags);
321	#endif
322
323	if (ev_method)
324	{
325	evw_init (&sigev, sigcb);
326	siginit ();
327	}
328
329	return ev_method;
330	}
331
332	/*****************************************************************************/
333
334	void ev_prefork (void)
335	{
336	/* nop */
337	}
338
339	void ev_postfork_parent (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_child (void)
345	{
346	#if HAVE_EPOLL
347	if (ev_method == EVMETHOD_EPOLL)
348	epoll_postfork_child ();
349	#endif
350
351	evio_stop (&sigev);
352	close (sigpipe [0]);
353	close (sigpipe [1]);
354	pipe (sigpipe);
355	siginit ();
356	}
357
358	/*****************************************************************************/
359
360	static void
361	fd_reify (void)
362	{
363	int i;
364
365	for (i = 0; i < fdchangecnt; ++i)
366	{
367	int fd = fdchanges [i];
368	ANFD *anfd = anfds + fd;
369	struct ev_io *w;
370
371	int wev = 0;
372
373	for (w = anfd->head; w; w = w->next)
374	wev |= w->events;
375
376	if (anfd->wev != wev)
377	{
378	method_modify (fd, anfd->wev, wev);
379	anfd->wev = wev;
380	}
381	}
382
383	fdchangecnt = 0;
384	}
385
386	static void
387	call_pending ()
388	{
389	int i;
390
391	for (i = 0; i < pendingcnt; ++i)
392	{
393	ANPENDING *p = pendings + i;
394
395	if (p->w)
396	{
397	p->w->pending = 0;
398	p->w->cb (p->w, p->events);
399	}
400	}
401
402	pendingcnt = 0;
403	}
404
405	static void
406	timers_reify ()	1461	timers_reify (EV_P)
407	{	1462	{
408	while (timercnt && timers [0]->at <= now)	1463	while (timercnt && ((WT)timers [0])->at <= mn_now)
409	{	1464	{
410	struct ev_timer *w = timers [0];	1465	ev_timer *w = (ev_timer *)timers [0];
		1466
		1467	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
411		1468
412	/* first reschedule or stop timer */	1469	/* first reschedule or stop timer */
413	if (w->repeat)	1470	if (w->repeat)
414	{	1471	{
		1472	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1473
415	w->at = now + w->repeat;	1474	((WT)w)->at += w->repeat;
416	assert (("timer timeout in the past, negative repeat?", w->at > now));	1475	if (((WT)w)->at < mn_now)
		1476	((WT)w)->at = mn_now;
		1477
417	downheap ((WT *)timers, timercnt, 0);	1478	downheap (timers, timercnt, 0);
418	}	1479	}
419	else	1480	else
420	evtimer_stop (w); /* nonrepeating: stop timer */	1481	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421		1482
422	event ((W)w, EV_TIMEOUT);	1483	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
423	}	1484	}
424	}	1485	}
425		1486
426	static void	1487	#if EV_PERIODIC_ENABLE
		1488	void inline_size
427	periodics_reify ()	1489	periodics_reify (EV_P)
428	{	1490	{
429	while (periodiccnt && periodics [0]->at <= ev_now)	1491	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
430	{	1492	{
431	struct ev_periodic *w = periodics [0];	1493	ev_periodic *w = (ev_periodic *)periodics [0];
		1494
		1495	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
432		1496
433	/* first reschedule or stop timer */	1497	/* first reschedule or stop timer */
434	if (w->interval)	1498	if (w->reschedule_cb)
435	{	1499	{
436	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1500	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
437	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1501	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
438	downheap ((WT *)periodics, periodiccnt, 0);	1502	downheap (periodics, periodiccnt, 0);
		1503	}
		1504	else if (w->interval)
		1505	{
		1506	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1507	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1508	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1509	downheap (periodics, periodiccnt, 0);
439	}	1510	}
440	else	1511	else
441	evperiodic_stop (w); /* nonrepeating: stop timer */	1512	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442		1513
443	event ((W)w, EV_TIMEOUT);	1514	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
444	}	1515	}
445	}	1516	}
446		1517
447	static void	1518	static void noinline
448	periodics_reschedule (ev_tstamp diff)	1519	periodics_reschedule (EV_P)
449	{	1520	{
450	int i;	1521	int i;
451		1522
452	/* adjust periodics after time jump */	1523	/* adjust periodics after time jump */
453	for (i = 0; i < periodiccnt; ++i)	1524	for (i = 0; i < periodiccnt; ++i)
454	{	1525	{
455	struct ev_periodic *w = periodics [i];	1526	ev_periodic *w = (ev_periodic *)periodics [i];
456		1527
		1528	if (w->reschedule_cb)
		1529	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
457	if (w->interval)	1530	else if (w->interval)
		1531	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1532	}
		1533
		1534	/* now rebuild the heap */
		1535	for (i = periodiccnt >> 1; i--; )
		1536	downheap (periodics, periodiccnt, i);
		1537	}
		1538	#endif
		1539
		1540	#if EV_IDLE_ENABLE
		1541	void inline_size
		1542	idle_reify (EV_P)
		1543	{
		1544	if (expect_false (idleall))
		1545	{
		1546	int pri;
		1547
		1548	for (pri = NUMPRI; pri--; )
458	{	1549	{
459	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1550	if (pendingcnt [pri])
		1551	break;
460		1552
461	if (fabs (diff) >= 1e-4)	1553	if (idlecnt [pri])
462	{	1554	{
463	evperiodic_stop (w);	1555	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
464	evperiodic_start (w);	1556	break;
465
466	i = 0; /* restart loop, inefficient, but time jumps should be rare */
467	}	1557	}
468	}	1558	}
469	}	1559	}
470	}	1560	}
		1561	#endif
471		1562
472	static void	1563	void inline_speed
473	time_update ()	1564	time_update (EV_P_ ev_tstamp max_block)
474	{	1565	{
475	int i;	1566	int i;
476		1567
477	ev_now = ev_time ();	1568	#if EV_USE_MONOTONIC
478
479	if (have_monotonic)	1569	if (expect_true (have_monotonic))
480	{	1570	{
481	ev_tstamp odiff = diff;	1571	ev_tstamp odiff = rtmn_diff;
482		1572
483	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1573	mn_now = get_clock ();
		1574
		1575	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1576	/* interpolate in the meantime */
		1577	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
484	{	1578	{
485	now = get_clock ();	1579	ev_rt_now = rtmn_diff + mn_now;
		1580	return;
		1581	}
		1582
		1583	now_floor = mn_now;
		1584	ev_rt_now = ev_time ();
		1585
		1586	/* loop a few times, before making important decisions.
		1587	* on the choice of "4": one iteration isn't enough,
		1588	* in case we get preempted during the calls to
		1589	* ev_time and get_clock. a second call is almost guaranteed
		1590	* to succeed in that case, though. and looping a few more times
		1591	* doesn't hurt either as we only do this on time-jumps or
		1592	* in the unlikely event of having been preempted here.
		1593	*/
		1594	for (i = 4; --i; )
		1595	{
486	diff = ev_now - now;	1596	rtmn_diff = ev_rt_now - mn_now;
487		1597
488	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1598	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
489	return; /* all is well */	1599	return; /* all is well */
490		1600
491	ev_now = ev_time ();	1601	ev_rt_now = ev_time ();
		1602	mn_now = get_clock ();
		1603	now_floor = mn_now;
492	}	1604	}
493		1605
		1606	# if EV_PERIODIC_ENABLE
494	periodics_reschedule (diff - odiff);	1607	periodics_reschedule (EV_A);
		1608	# endif
495	/* no timer adjustment, as the monotonic clock doesn't jump */	1609	/* no timer adjustment, as the monotonic clock doesn't jump */
		1610	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
496	}	1611	}
497	else	1612	else
		1613	#endif
498	{	1614	{
499	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1615	ev_rt_now = ev_time ();
		1616
		1617	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
500	{	1618	{
		1619	#if EV_PERIODIC_ENABLE
501	periodics_reschedule (ev_now - now);	1620	periodics_reschedule (EV_A);
502		1621	#endif
503	/* adjust timers. this is easy, as the offset is the same for all */	1622	/* adjust timers. this is easy, as the offset is the same for all of them */
504	for (i = 0; i < timercnt; ++i)	1623	for (i = 0; i < timercnt; ++i)
505	timers [i]->at += diff;	1624	((WT)timers [i])->at += ev_rt_now - mn_now;
506	}	1625	}
507		1626
508	now = ev_now;	1627	mn_now = ev_rt_now;
509	}
510	}
511
512	int ev_loop_done;
513
514	void ev_loop (int flags)
515	{
516	double block;
517	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
518
519	if (checkcnt)
520	{	1628	}
521	queue_events ((W *)checks, checkcnt, EV_CHECK);	1629	}
522	call_pending ();	1630
523	}	1631	void
		1632	ev_ref (EV_P)
		1633	{
		1634	++activecnt;
		1635	}
		1636
		1637	void
		1638	ev_unref (EV_P)
		1639	{
		1640	--activecnt;
		1641	}
		1642
		1643	static int loop_done;
		1644
		1645	void
		1646	ev_loop (EV_P_ int flags)
		1647	{
		1648	loop_done = EVUNLOOP_CANCEL;
		1649
		1650	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
524		1651
525	do	1652	do
526	{	1653	{
		1654	#ifndef _WIN32
		1655	if (expect_false (curpid)) /* penalise the forking check even more */
		1656	if (expect_false (getpid () != curpid))
		1657	{
		1658	curpid = getpid ();
		1659	postfork = 1;
		1660	}
		1661	#endif
		1662
		1663	#if EV_FORK_ENABLE
		1664	/* we might have forked, so queue fork handlers */
		1665	if (expect_false (postfork))
		1666	if (forkcnt)
		1667	{
		1668	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1669	call_pending (EV_A);
		1670	}
		1671	#endif
		1672
		1673	/* queue prepare watchers (and execute them) */
		1674	if (expect_false (preparecnt))
		1675	{
		1676	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1677	call_pending (EV_A);
		1678	}
		1679
		1680	if (expect_false (!activecnt))
		1681	break;
		1682
		1683	/* we might have forked, so reify kernel state if necessary */
		1684	if (expect_false (postfork))
		1685	loop_fork (EV_A);
		1686
527	/* update fd-related kernel structures */	1687	/* update fd-related kernel structures */
528	fd_reify ();	1688	fd_reify (EV_A);
529		1689
530	/* calculate blocking time */	1690	/* calculate blocking time */
		1691	{
		1692	ev_tstamp waittime = 0.;
		1693	ev_tstamp sleeptime = 0.;
531		1694
532	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1695	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
533	ev_now = ev_time ();
534
535	if (flags & EVLOOP_NONBLOCK || idlecnt)
536	block = 0.;
537	else
538	{	1696	{
		1697	/* update time to cancel out callback processing overhead */
		1698	time_update (EV_A_ 1e100);
		1699
539	block = MAX_BLOCKTIME;	1700	waittime = MAX_BLOCKTIME;
540		1701
541	if (timercnt)	1702	if (timercnt)
542	{	1703	{
543	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1704	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
544	if (block > to) block = to;	1705	if (waittime > to) waittime = to;
545	}	1706	}
546		1707
		1708	#if EV_PERIODIC_ENABLE
547	if (periodiccnt)	1709	if (periodiccnt)
548	{	1710	{
549	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1711	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
550	if (block > to) block = to;	1712	if (waittime > to) waittime = to;
551	}	1713	}
		1714	#endif
552		1715
553	if (block < 0.) block = 0.;	1716	if (expect_false (waittime < timeout_blocktime))
		1717	waittime = timeout_blocktime;
		1718
		1719	sleeptime = waittime - backend_fudge;
		1720
		1721	if (expect_true (sleeptime > io_blocktime))
		1722	sleeptime = io_blocktime;
		1723
		1724	if (sleeptime)
		1725	{
		1726	ev_sleep (sleeptime);
		1727	waittime -= sleeptime;
		1728	}
554	}	1729	}
555		1730
556	method_poll (block);	1731	++loop_count;
		1732	backend_poll (EV_A_ waittime);
557		1733
558	/* update ev_now, do magic */	1734	/* update ev_rt_now, do magic */
559	time_update ();	1735	time_update (EV_A_ waittime + sleeptime);
		1736	}
560		1737
561	/* queue pending timers and reschedule them */	1738	/* queue pending timers and reschedule them */
		1739	timers_reify (EV_A); /* relative timers called last */
		1740	#if EV_PERIODIC_ENABLE
562	periodics_reify (); /* absolute timers first */	1741	periodics_reify (EV_A); /* absolute timers called first */
563	timers_reify (); /* relative timers second */	1742	#endif
564		1743
		1744	#if EV_IDLE_ENABLE
565	/* queue idle watchers unless io or timers are pending */	1745	/* queue idle watchers unless other events are pending */
566	if (!pendingcnt)	1746	idle_reify (EV_A);
567	queue_events ((W *)idles, idlecnt, EV_IDLE);	1747	#endif
568		1748
569	/* queue check and possibly idle watchers */	1749	/* queue check watchers, to be executed first */
		1750	if (expect_false (checkcnt))
570	queue_events ((W *)checks, checkcnt, EV_CHECK);	1751	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571		1752
572	call_pending ();	1753	call_pending (EV_A);
573	}	1754	}
574	while (!ev_loop_done);	1755	while (expect_true (
		1756	activecnt
		1757	&& !loop_done
		1758	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1759	));
575		1760
576	if (ev_loop_done != 2)	1761	if (loop_done == EVUNLOOP_ONE)
		1762	loop_done = EVUNLOOP_CANCEL;
		1763	}
		1764
		1765	void
		1766	ev_unloop (EV_P_ int how)
		1767	{
577	ev_loop_done = 0;	1768	loop_done = how;
578	}	1769	}
579		1770
580	/*****************************************************************************/	1771	/*****************************************************************************/
581		1772
582	static void	1773	void inline_size
583	wlist_add (WL *head, WL elem)	1774	wlist_add (WL *head, WL elem)
584	{	1775	{
585	elem->next = *head;	1776	elem->next = *head;
586	*head = elem;	1777	*head = elem;
587	}	1778	}
588		1779
589	static void	1780	void inline_size
590	wlist_del (WL *head, WL elem)	1781	wlist_del (WL *head, WL elem)
591	{	1782	{
592	while (*head)	1783	while (*head)
593	{	1784	{
594	if (*head == elem)	1785	if (*head == elem)
…		…
599		1790
600	head = &(*head)->next;	1791	head = &(*head)->next;
601	}	1792	}
602	}	1793	}
603		1794
604	static void	1795	void inline_speed
		1796	clear_pending (EV_P_ W w)
		1797	{
		1798	if (w->pending)
		1799	{
		1800	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1801	w->pending = 0;
		1802	}
		1803	}
		1804
		1805	int
		1806	ev_clear_pending (EV_P_ void *w)
		1807	{
		1808	W w_ = (W)w;
		1809	int pending = w_->pending;
		1810
		1811	if (expect_true (pending))
		1812	{
		1813	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1814	w_->pending = 0;
		1815	p->w = 0;
		1816	return p->events;
		1817	}
		1818	else
		1819	return 0;
		1820	}
		1821
		1822	void inline_size
		1823	pri_adjust (EV_P_ W w)
		1824	{
		1825	int pri = w->priority;
		1826	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1827	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1828	w->priority = pri;
		1829	}
		1830
		1831	void inline_speed
605	ev_start (W w, int active)	1832	ev_start (EV_P_ W w, int active)
606	{	1833	{
607	w->pending = 0;	1834	pri_adjust (EV_A_ w);
608	w->active = active;	1835	w->active = active;
		1836	ev_ref (EV_A);
609	}	1837	}
610		1838
611	static void	1839	void inline_size
612	ev_stop (W w)	1840	ev_stop (EV_P_ W w)
613	{	1841	{
614	if (w->pending)	1842	ev_unref (EV_A);
615	pendings [w->pending - 1].w = 0;
616
617	w->active = 0;	1843	w->active = 0;
618	}	1844	}
619		1845
620	/*****************************************************************************/	1846	/*****************************************************************************/
621		1847
622	void	1848	void noinline
623	evio_start (struct ev_io *w)	1849	ev_io_start (EV_P_ ev_io *w)
624	{	1850	{
625	if (ev_is_active (w))
626	return;
627
628	int fd = w->fd;	1851	int fd = w->fd;
629		1852
		1853	if (expect_false (ev_is_active (w)))
		1854	return;
		1855
		1856	assert (("ev_io_start called with negative fd", fd >= 0));
		1857
630	ev_start ((W)w, 1);	1858	ev_start (EV_A_ (W)w, 1);
631	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1859	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
632	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1860	wlist_add (&anfds[fd].head, (WL)w);
633		1861
634	++fdchangecnt;	1862	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
635	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1863	w->events &= ~EV_IOFDSET;
636	fdchanges [fdchangecnt - 1] = fd;
637	}	1864	}
638		1865
639	void	1866	void noinline
640	evio_stop (struct ev_io *w)	1867	ev_io_stop (EV_P_ ev_io *w)
641	{	1868	{
		1869	clear_pending (EV_A_ (W)w);
642	if (!ev_is_active (w))	1870	if (expect_false (!ev_is_active (w)))
643	return;	1871	return;
644		1872
		1873	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1874
645	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1875	wlist_del (&anfds[w->fd].head, (WL)w);
646	ev_stop ((W)w);	1876	ev_stop (EV_A_ (W)w);
647		1877
648	++fdchangecnt;	1878	fd_change (EV_A_ w->fd, 1);
649	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650	fdchanges [fdchangecnt - 1] = w->fd;
651	}	1879	}
652		1880
653		1881	void noinline
654	void
655	evtimer_start (struct ev_timer *w)	1882	ev_timer_start (EV_P_ ev_timer *w)
656	{	1883	{
657	if (ev_is_active (w))	1884	if (expect_false (ev_is_active (w)))
658	return;	1885	return;
659		1886
660	w->at += now;	1887	((WT)w)->at += mn_now;
661		1888
662	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1889	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
663		1890
664	ev_start ((W)w, ++timercnt);	1891	ev_start (EV_A_ (W)w, ++timercnt);
665	array_needsize (timers, timermax, timercnt, );	1892	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
666	timers [timercnt - 1] = w;	1893	timers [timercnt - 1] = (WT)w;
667	upheap ((WT *)timers, timercnt - 1);	1894	upheap (timers, timercnt - 1);
668	}
669		1895
670	void	1896	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1897	}
		1898
		1899	void noinline
671	evtimer_stop (struct ev_timer *w)	1900	ev_timer_stop (EV_P_ ev_timer *w)
672	{	1901	{
		1902	clear_pending (EV_A_ (W)w);
673	if (!ev_is_active (w))	1903	if (expect_false (!ev_is_active (w)))
674	return;	1904	return;
675		1905
676	if (w->active < timercnt--)	1906	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1907
		1908	{
		1909	int active = ((W)w)->active;
		1910
		1911	if (expect_true (--active < --timercnt))
677	{	1912	{
678	timers [w->active - 1] = timers [timercnt];	1913	timers [active] = timers [timercnt];
679	downheap ((WT *)timers, timercnt, w->active - 1);	1914	adjustheap (timers, timercnt, active);
680	}	1915	}
		1916	}
681		1917
682	w->at = w->repeat;	1918	((WT)w)->at -= mn_now;
683		1919
684	ev_stop ((W)w);	1920	ev_stop (EV_A_ (W)w);
685	}	1921	}
686		1922
687	void	1923	void noinline
688	evtimer_again (struct ev_timer *w)	1924	ev_timer_again (EV_P_ ev_timer *w)
689	{	1925	{
690	if (ev_is_active (w))	1926	if (ev_is_active (w))
691	{	1927	{
692	if (w->repeat)	1928	if (w->repeat)
693	{	1929	{
694	w->at = now + w->repeat;	1930	((WT)w)->at = mn_now + w->repeat;
695	downheap ((WT *)timers, timercnt, w->active - 1);	1931	adjustheap (timers, timercnt, ((W)w)->active - 1);
696	}	1932	}
697	else	1933	else
698	evtimer_stop (w);	1934	ev_timer_stop (EV_A_ w);
699	}	1935	}
700	else if (w->repeat)	1936	else if (w->repeat)
		1937	{
		1938	w->at = w->repeat;
701	evtimer_start (w);	1939	ev_timer_start (EV_A_ w);
		1940	}
702	}	1941	}
703		1942
704	void	1943	#if EV_PERIODIC_ENABLE
		1944	void noinline
705	evperiodic_start (struct ev_periodic *w)	1945	ev_periodic_start (EV_P_ ev_periodic *w)
706	{	1946	{
707	if (ev_is_active (w))	1947	if (expect_false (ev_is_active (w)))
708	return;	1948	return;
709		1949
710	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1950	if (w->reschedule_cb)
711		1951	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1952	else if (w->interval)
		1953	{
		1954	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
712	/* this formula differs from the one in periodic_reify because we do not always round up */	1955	/* this formula differs from the one in periodic_reify because we do not always round up */
713	if (w->interval)
714	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1956	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1957	}
		1958	else
		1959	((WT)w)->at = w->offset;
715		1960
716	ev_start ((W)w, ++periodiccnt);	1961	ev_start (EV_A_ (W)w, ++periodiccnt);
717	array_needsize (periodics, periodicmax, periodiccnt, );	1962	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
718	periodics [periodiccnt - 1] = w;	1963	periodics [periodiccnt - 1] = (WT)w;
719	upheap ((WT *)periodics, periodiccnt - 1);	1964	upheap (periodics, periodiccnt - 1);
720	}
721		1965
722	void	1966	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1967	}
		1968
		1969	void noinline
723	evperiodic_stop (struct ev_periodic *w)	1970	ev_periodic_stop (EV_P_ ev_periodic *w)
724	{	1971	{
		1972	clear_pending (EV_A_ (W)w);
725	if (!ev_is_active (w))	1973	if (expect_false (!ev_is_active (w)))
726	return;	1974	return;
727		1975
728	if (w->active < periodiccnt--)	1976	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1977
		1978	{
		1979	int active = ((W)w)->active;
		1980
		1981	if (expect_true (--active < --periodiccnt))
729	{	1982	{
730	periodics [w->active - 1] = periodics [periodiccnt];	1983	periodics [active] = periodics [periodiccnt];
731	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1984	adjustheap (periodics, periodiccnt, active);
732	}	1985	}
		1986	}
733		1987
734	ev_stop ((W)w);	1988	ev_stop (EV_A_ (W)w);
735	}	1989	}
736		1990
737	void	1991	void noinline
		1992	ev_periodic_again (EV_P_ ev_periodic *w)
		1993	{
		1994	/* TODO: use adjustheap and recalculation */
		1995	ev_periodic_stop (EV_A_ w);
		1996	ev_periodic_start (EV_A_ w);
		1997	}
		1998	#endif
		1999
		2000	#ifndef SA_RESTART
		2001	# define SA_RESTART 0
		2002	#endif
		2003
		2004	void noinline
738	evsignal_start (struct ev_signal *w)	2005	ev_signal_start (EV_P_ ev_signal *w)
739	{	2006	{
		2007	#if EV_MULTIPLICITY
		2008	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2009	#endif
740	if (ev_is_active (w))	2010	if (expect_false (ev_is_active (w)))
741	return;	2011	return;
742		2012
743	ev_start ((W)w, 1);	2013	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2014
		2015	evpipe_init (EV_A);
		2016
		2017	{
		2018	#ifndef _WIN32
		2019	sigset_t full, prev;
		2020	sigfillset (&full);
		2021	sigprocmask (SIG_SETMASK, &full, &prev);
		2022	#endif
		2023
744	array_needsize (signals, signalmax, w->signum, signals_init);	2024	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2025
		2026	#ifndef _WIN32
		2027	sigprocmask (SIG_SETMASK, &prev, 0);
		2028	#endif
		2029	}
		2030
		2031	ev_start (EV_A_ (W)w, 1);
745	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2032	wlist_add (&signals [w->signum - 1].head, (WL)w);
746		2033
747	if (!w->next)	2034	if (!((WL)w)->next)
748	{	2035	{
		2036	#if _WIN32
		2037	signal (w->signum, ev_sighandler);
		2038	#else
749	struct sigaction sa;	2039	struct sigaction sa;
750	sa.sa_handler = sighandler;	2040	sa.sa_handler = ev_sighandler;
751	sigfillset (&sa.sa_mask);	2041	sigfillset (&sa.sa_mask);
752	sa.sa_flags = 0;	2042	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
753	sigaction (w->signum, &sa, 0);	2043	sigaction (w->signum, &sa, 0);
		2044	#endif
754	}	2045	}
755	}	2046	}
756		2047
757	void	2048	void noinline
758	evsignal_stop (struct ev_signal *w)	2049	ev_signal_stop (EV_P_ ev_signal *w)
759	{	2050	{
		2051	clear_pending (EV_A_ (W)w);
760	if (!ev_is_active (w))	2052	if (expect_false (!ev_is_active (w)))
761	return;	2053	return;
762		2054
763	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2055	wlist_del (&signals [w->signum - 1].head, (WL)w);
764	ev_stop ((W)w);	2056	ev_stop (EV_A_ (W)w);
765		2057
766	if (!signals [w->signum - 1].head)	2058	if (!signals [w->signum - 1].head)
767	signal (w->signum, SIG_DFL);	2059	signal (w->signum, SIG_DFL);
768	}	2060	}
769		2061
770	void evidle_start (struct ev_idle *w)	2062	void
		2063	ev_child_start (EV_P_ ev_child *w)
771	{	2064	{
		2065	#if EV_MULTIPLICITY
		2066	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2067	#endif
772	if (ev_is_active (w))	2068	if (expect_false (ev_is_active (w)))
773	return;	2069	return;
774		2070
775	ev_start ((W)w, ++idlecnt);	2071	ev_start (EV_A_ (W)w, 1);
776	array_needsize (idles, idlemax, idlecnt, );	2072	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
777	idles [idlecnt - 1] = w;
778	}	2073	}
779		2074
780	void evidle_stop (struct ev_idle *w)	2075	void
		2076	ev_child_stop (EV_P_ ev_child *w)
781	{	2077	{
782	idles [w->active - 1] = idles [--idlecnt];	2078	clear_pending (EV_A_ (W)w);
		2079	if (expect_false (!ev_is_active (w)))
		2080	return;
		2081
		2082	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
783	ev_stop ((W)w);	2083	ev_stop (EV_A_ (W)w);
784	}	2084	}
785		2085
		2086	#if EV_STAT_ENABLE
		2087
		2088	# ifdef _WIN32
		2089	# undef lstat
		2090	# define lstat(a,b) _stati64 (a,b)
		2091	# endif
		2092
		2093	#define DEF_STAT_INTERVAL 5.0074891
		2094	#define MIN_STAT_INTERVAL 0.1074891
		2095
		2096	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2097
		2098	#if EV_USE_INOTIFY
		2099	# define EV_INOTIFY_BUFSIZE 8192
		2100
		2101	static void noinline
		2102	infy_add (EV_P_ ev_stat *w)
		2103	{
		2104	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);
		2105
		2106	if (w->wd < 0)
		2107	{
		2108	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2109
		2110	/* monitor some parent directory for speedup hints */
		2111	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2112	{
		2113	char path [4096];
		2114	strcpy (path, w->path);
		2115
		2116	do
		2117	{
		2118	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2119	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2120
		2121	char *pend = strrchr (path, '/');
		2122
		2123	if (!pend)
		2124	break; /* whoops, no '/', complain to your admin */
		2125
		2126	*pend = 0;
		2127	w->wd = inotify_add_watch (fs_fd, path, mask);
		2128	}
		2129	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2130	}
		2131	}
		2132	else
		2133	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2134
		2135	if (w->wd >= 0)
		2136	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2137	}
		2138
		2139	static void noinline
		2140	infy_del (EV_P_ ev_stat *w)
		2141	{
		2142	int slot;
		2143	int wd = w->wd;
		2144
		2145	if (wd < 0)
		2146	return;
		2147
		2148	w->wd = -2;
		2149	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2150	wlist_del (&fs_hash [slot].head, (WL)w);
		2151
		2152	/* remove this watcher, if others are watching it, they will rearm */
		2153	inotify_rm_watch (fs_fd, wd);
		2154	}
		2155
		2156	static void noinline
		2157	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2158	{
		2159	if (slot < 0)
		2160	/* overflow, need to check for all hahs slots */
		2161	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2162	infy_wd (EV_A_ slot, wd, ev);
		2163	else
		2164	{
		2165	WL w_;
		2166
		2167	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2168	{
		2169	ev_stat *w = (ev_stat *)w_;
		2170	w_ = w_->next; /* lets us remove this watcher and all before it */
		2171
		2172	if (w->wd == wd || wd == -1)
		2173	{
		2174	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2175	{
		2176	w->wd = -1;
		2177	infy_add (EV_A_ w); /* re-add, no matter what */
		2178	}
		2179
		2180	stat_timer_cb (EV_A_ &w->timer, 0);
		2181	}
		2182	}
		2183	}
		2184	}
		2185
		2186	static void
		2187	infy_cb (EV_P_ ev_io *w, int revents)
		2188	{
		2189	char buf [EV_INOTIFY_BUFSIZE];
		2190	struct inotify_event *ev = (struct inotify_event *)buf;
		2191	int ofs;
		2192	int len = read (fs_fd, buf, sizeof (buf));
		2193
		2194	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2195	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2196	}
		2197
		2198	void inline_size
		2199	infy_init (EV_P)
		2200	{
		2201	if (fs_fd != -2)
		2202	return;
		2203
		2204	fs_fd = inotify_init ();
		2205
		2206	if (fs_fd >= 0)
		2207	{
		2208	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2209	ev_set_priority (&fs_w, EV_MAXPRI);
		2210	ev_io_start (EV_A_ &fs_w);
		2211	}
		2212	}
		2213
		2214	void inline_size
		2215	infy_fork (EV_P)
		2216	{
		2217	int slot;
		2218
		2219	if (fs_fd < 0)
		2220	return;
		2221
		2222	close (fs_fd);
		2223	fs_fd = inotify_init ();
		2224
		2225	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2226	{
		2227	WL w_ = fs_hash [slot].head;
		2228	fs_hash [slot].head = 0;
		2229
		2230	while (w_)
		2231	{
		2232	ev_stat *w = (ev_stat *)w_;
		2233	w_ = w_->next; /* lets us add this watcher */
		2234
		2235	w->wd = -1;
		2236
		2237	if (fs_fd >= 0)
		2238	infy_add (EV_A_ w); /* re-add, no matter what */
		2239	else
		2240	ev_timer_start (EV_A_ &w->timer);
		2241	}
		2242
		2243	}
		2244	}
		2245
		2246	#endif
		2247
		2248	void
		2249	ev_stat_stat (EV_P_ ev_stat *w)
		2250	{
		2251	if (lstat (w->path, &w->attr) < 0)
		2252	w->attr.st_nlink = 0;
		2253	else if (!w->attr.st_nlink)
		2254	w->attr.st_nlink = 1;
		2255	}
		2256
		2257	static void noinline
		2258	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2259	{
		2260	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2261
		2262	/* we copy this here each the time so that */
		2263	/* prev has the old value when the callback gets invoked */
		2264	w->prev = w->attr;
		2265	ev_stat_stat (EV_A_ w);
		2266
		2267	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2268	if (
		2269	w->prev.st_dev != w->attr.st_dev
		2270	|| w->prev.st_ino != w->attr.st_ino
		2271	|| w->prev.st_mode != w->attr.st_mode
		2272	|| w->prev.st_nlink != w->attr.st_nlink
		2273	|| w->prev.st_uid != w->attr.st_uid
		2274	|| w->prev.st_gid != w->attr.st_gid
		2275	|| w->prev.st_rdev != w->attr.st_rdev
		2276	|| w->prev.st_size != w->attr.st_size
		2277	|| w->prev.st_atime != w->attr.st_atime
		2278	|| w->prev.st_mtime != w->attr.st_mtime
		2279	|| w->prev.st_ctime != w->attr.st_ctime
		2280	) {
		2281	#if EV_USE_INOTIFY
		2282	infy_del (EV_A_ w);
		2283	infy_add (EV_A_ w);
		2284	ev_stat_stat (EV_A_ w); /* avoid race... */
		2285	#endif
		2286
		2287	ev_feed_event (EV_A_ w, EV_STAT);
		2288	}
		2289	}
		2290
		2291	void
		2292	ev_stat_start (EV_P_ ev_stat *w)
		2293	{
		2294	if (expect_false (ev_is_active (w)))
		2295	return;
		2296
		2297	/* since we use memcmp, we need to clear any padding data etc. */
		2298	memset (&w->prev, 0, sizeof (ev_statdata));
		2299	memset (&w->attr, 0, sizeof (ev_statdata));
		2300
		2301	ev_stat_stat (EV_A_ w);
		2302
		2303	if (w->interval < MIN_STAT_INTERVAL)
		2304	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2305
		2306	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2307	ev_set_priority (&w->timer, ev_priority (w));
		2308
		2309	#if EV_USE_INOTIFY
		2310	infy_init (EV_A);
		2311
		2312	if (fs_fd >= 0)
		2313	infy_add (EV_A_ w);
		2314	else
		2315	#endif
		2316	ev_timer_start (EV_A_ &w->timer);
		2317
		2318	ev_start (EV_A_ (W)w, 1);
		2319	}
		2320
		2321	void
		2322	ev_stat_stop (EV_P_ ev_stat *w)
		2323	{
		2324	clear_pending (EV_A_ (W)w);
		2325	if (expect_false (!ev_is_active (w)))
		2326	return;
		2327
		2328	#if EV_USE_INOTIFY
		2329	infy_del (EV_A_ w);
		2330	#endif
		2331	ev_timer_stop (EV_A_ &w->timer);
		2332
		2333	ev_stop (EV_A_ (W)w);
		2334	}
		2335	#endif
		2336
		2337	#if EV_IDLE_ENABLE
		2338	void
		2339	ev_idle_start (EV_P_ ev_idle *w)
		2340	{
		2341	if (expect_false (ev_is_active (w)))
		2342	return;
		2343
		2344	pri_adjust (EV_A_ (W)w);
		2345
		2346	{
		2347	int active = ++idlecnt [ABSPRI (w)];
		2348
		2349	++idleall;
		2350	ev_start (EV_A_ (W)w, active);
		2351
		2352	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2353	idles [ABSPRI (w)][active - 1] = w;
		2354	}
		2355	}
		2356
		2357	void
		2358	ev_idle_stop (EV_P_ ev_idle *w)
		2359	{
		2360	clear_pending (EV_A_ (W)w);
		2361	if (expect_false (!ev_is_active (w)))
		2362	return;
		2363
		2364	{
		2365	int active = ((W)w)->active;
		2366
		2367	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2368	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2369
		2370	ev_stop (EV_A_ (W)w);
		2371	--idleall;
		2372	}
		2373	}
		2374	#endif
		2375
		2376	void
		2377	ev_prepare_start (EV_P_ ev_prepare *w)
		2378	{
		2379	if (expect_false (ev_is_active (w)))
		2380	return;
		2381
		2382	ev_start (EV_A_ (W)w, ++preparecnt);
		2383	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2384	prepares [preparecnt - 1] = w;
		2385	}
		2386
		2387	void
		2388	ev_prepare_stop (EV_P_ ev_prepare *w)
		2389	{
		2390	clear_pending (EV_A_ (W)w);
		2391	if (expect_false (!ev_is_active (w)))
		2392	return;
		2393
		2394	{
		2395	int active = ((W)w)->active;
		2396	prepares [active - 1] = prepares [--preparecnt];
		2397	((W)prepares [active - 1])->active = active;
		2398	}
		2399
		2400	ev_stop (EV_A_ (W)w);
		2401	}
		2402
		2403	void
786	void evcheck_start (struct ev_check *w)	2404	ev_check_start (EV_P_ ev_check *w)
787	{	2405	{
788	if (ev_is_active (w))	2406	if (expect_false (ev_is_active (w)))
789	return;	2407	return;
790		2408
791	ev_start ((W)w, ++checkcnt);	2409	ev_start (EV_A_ (W)w, ++checkcnt);
792	array_needsize (checks, checkmax, checkcnt, );	2410	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
793	checks [checkcnt - 1] = w;	2411	checks [checkcnt - 1] = w;
794	}	2412	}
795		2413
		2414	void
796	void evcheck_stop (struct ev_check *w)	2415	ev_check_stop (EV_P_ ev_check *w)
797	{	2416	{
		2417	clear_pending (EV_A_ (W)w);
		2418	if (expect_false (!ev_is_active (w)))
		2419	return;
		2420
		2421	{
		2422	int active = ((W)w)->active;
798	checks [w->active - 1] = checks [--checkcnt];	2423	checks [active - 1] = checks [--checkcnt];
		2424	((W)checks [active - 1])->active = active;
		2425	}
		2426
799	ev_stop ((W)w);	2427	ev_stop (EV_A_ (W)w);
800	}	2428	}
		2429
		2430	#if EV_EMBED_ENABLE
		2431	void noinline
		2432	ev_embed_sweep (EV_P_ ev_embed *w)
		2433	{
		2434	ev_loop (w->other, EVLOOP_NONBLOCK);
		2435	}
		2436
		2437	static void
		2438	embed_io_cb (EV_P_ ev_io *io, int revents)
		2439	{
		2440	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2441
		2442	if (ev_cb (w))
		2443	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2444	else
		2445	ev_loop (w->other, EVLOOP_NONBLOCK);
		2446	}
		2447
		2448	static void
		2449	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2450	{
		2451	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2452
		2453	{
		2454	struct ev_loop *loop = w->other;
		2455
		2456	while (fdchangecnt)
		2457	{
		2458	fd_reify (EV_A);
		2459	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2460	}
		2461	}
		2462	}
		2463
		2464	#if 0
		2465	static void
		2466	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2467	{
		2468	ev_idle_stop (EV_A_ idle);
		2469	}
		2470	#endif
		2471
		2472	void
		2473	ev_embed_start (EV_P_ ev_embed *w)
		2474	{
		2475	if (expect_false (ev_is_active (w)))
		2476	return;
		2477
		2478	{
		2479	struct ev_loop *loop = w->other;
		2480	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2481	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2482	}
		2483
		2484	ev_set_priority (&w->io, ev_priority (w));
		2485	ev_io_start (EV_A_ &w->io);
		2486
		2487	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2488	ev_set_priority (&w->prepare, EV_MINPRI);
		2489	ev_prepare_start (EV_A_ &w->prepare);
		2490
		2491	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2492
		2493	ev_start (EV_A_ (W)w, 1);
		2494	}
		2495
		2496	void
		2497	ev_embed_stop (EV_P_ ev_embed *w)
		2498	{
		2499	clear_pending (EV_A_ (W)w);
		2500	if (expect_false (!ev_is_active (w)))
		2501	return;
		2502
		2503	ev_io_stop (EV_A_ &w->io);
		2504	ev_prepare_stop (EV_A_ &w->prepare);
		2505
		2506	ev_stop (EV_A_ (W)w);
		2507	}
		2508	#endif
		2509
		2510	#if EV_FORK_ENABLE
		2511	void
		2512	ev_fork_start (EV_P_ ev_fork *w)
		2513	{
		2514	if (expect_false (ev_is_active (w)))
		2515	return;
		2516
		2517	ev_start (EV_A_ (W)w, ++forkcnt);
		2518	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2519	forks [forkcnt - 1] = w;
		2520	}
		2521
		2522	void
		2523	ev_fork_stop (EV_P_ ev_fork *w)
		2524	{
		2525	clear_pending (EV_A_ (W)w);
		2526	if (expect_false (!ev_is_active (w)))
		2527	return;
		2528
		2529	{
		2530	int active = ((W)w)->active;
		2531	forks [active - 1] = forks [--forkcnt];
		2532	((W)forks [active - 1])->active = active;
		2533	}
		2534
		2535	ev_stop (EV_A_ (W)w);
		2536	}
		2537	#endif
		2538
		2539	#if EV_ASYNC_ENABLE
		2540	void
		2541	ev_async_start (EV_P_ ev_async *w)
		2542	{
		2543	if (expect_false (ev_is_active (w)))
		2544	return;
		2545
		2546	evpipe_init (EV_A);
		2547
		2548	ev_start (EV_A_ (W)w, ++asynccnt);
		2549	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2550	asyncs [asynccnt - 1] = w;
		2551	}
		2552
		2553	void
		2554	ev_async_stop (EV_P_ ev_async *w)
		2555	{
		2556	clear_pending (EV_A_ (W)w);
		2557	if (expect_false (!ev_is_active (w)))
		2558	return;
		2559
		2560	{
		2561	int active = ((W)w)->active;
		2562	asyncs [active - 1] = asyncs [--asynccnt];
		2563	((W)asyncs [active - 1])->active = active;
		2564	}
		2565
		2566	ev_stop (EV_A_ (W)w);
		2567	}
		2568
		2569	void
		2570	ev_async_send (EV_P_ ev_async *w)
		2571	{
		2572	w->sent = 1;
		2573	evpipe_write (EV_A_ &gotasync);
		2574	}
		2575	#endif
801		2576
802	/*****************************************************************************/	2577	/*****************************************************************************/
803		2578
804	#if 0	2579	struct ev_once
805		2580	{
806	struct ev_io wio;	2581	ev_io io;
		2582	ev_timer to;
		2583	void (*cb)(int revents, void *arg);
		2584	void *arg;
		2585	};
807		2586
808	static void	2587	static void
809	sin_cb (struct ev_io *w, int revents)	2588	once_cb (EV_P_ struct ev_once *once, int revents)
810	{	2589	{
811	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2590	void (*cb)(int revents, void *arg) = once->cb;
		2591	void *arg = once->arg;
		2592
		2593	ev_io_stop (EV_A_ &once->io);
		2594	ev_timer_stop (EV_A_ &once->to);
		2595	ev_free (once);
		2596
		2597	cb (revents, arg);
812	}	2598	}
813		2599
814	static void	2600	static void
815	ocb (struct ev_timer *w, int revents)	2601	once_cb_io (EV_P_ ev_io *w, int revents)
816	{	2602	{
817	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2603	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
818	evtimer_stop (w);
819	evtimer_start (w);
820	}	2604	}
821		2605
822	static void	2606	static void
823	scb (struct ev_signal *w, int revents)	2607	once_cb_to (EV_P_ ev_timer *w, int revents)
824	{	2608	{
825	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2609	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
826	evio_stop (&wio);
827	evio_start (&wio);
828	}	2610	}
829		2611
830	static void	2612	void
831	gcb (struct ev_signal *w, int revents)	2613	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
832	{	2614	{
833	fprintf (stderr, "generic %x\n", revents);	2615	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
834		2616
835	}	2617	if (expect_false (!once))
836
837	int main (void)
838	{
839	ev_init (0);
840
841	evio_init (&wio, sin_cb, 0, EV_READ);
842	evio_start (&wio);
843
844	struct ev_timer t[10000];
845
846	#if 0
847	int i;
848	for (i = 0; i < 10000; ++i)
849	{
850	struct ev_timer *w = t + i;
851	evw_init (w, ocb, i);
852	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
853	evtimer_start (w);
854	if (drand48 () < 0.5)
855	evtimer_stop (w);
856	}	2618	{
857	#endif	2619	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
858
859	struct ev_timer t1;
860	evtimer_init (&t1, ocb, 5, 10);
861	evtimer_start (&t1);
862
863	struct ev_signal sig;
864	evsignal_init (&sig, scb, SIGQUIT);
865	evsignal_start (&sig);
866
867	struct ev_check cw;
868	evcheck_init (&cw, gcb);
869	evcheck_start (&cw);
870
871	struct ev_idle iw;
872	evidle_init (&iw, gcb);
873	evidle_start (&iw);
874
875	ev_loop (0);
876
877	return 0;	2620	return;
878	}	2621	}
879		2622
880	#endif	2623	once->cb = cb;
		2624	once->arg = arg;
881		2625
		2626	ev_init (&once->io, once_cb_io);
		2627	if (fd >= 0)
		2628	{
		2629	ev_io_set (&once->io, fd, events);
		2630	ev_io_start (EV_A_ &once->io);
		2631	}
882		2632
		2633	ev_init (&once->to, once_cb_to);
		2634	if (timeout >= 0.)
		2635	{
		2636	ev_timer_set (&once->to, timeout, 0.);
		2637	ev_timer_start (EV_A_ &once->to);
		2638	}
		2639	}
883		2640
		2641	#if EV_MULTIPLICITY
		2642	#include "ev_wrap.h"
		2643	#endif
884		2644
		2645	#ifdef __cplusplus
		2646	}
		2647	#endif
		2648

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