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Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.232 by root, Tue May 6 15:29:58 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	#ifndef HAVE_MONOTONIC	146	#include <signal.h>
15	# ifdef CLOCK_MONOTONIC	147
16	# define HAVE_MONOTONIC 1	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
17	# endif	163	# endif
18	#endif	164	#endif
19		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
20	#ifndef HAVE_SELECT	180	#ifndef EV_USE_SELECT
21	# 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
22	#endif	189	# endif
		190	#endif
23		191
24	#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
25	# define HAVE_EPOLL 0	196	# define EV_USE_EPOLL 0
26	#endif	197	# endif
		198	#endif
27		199
28	#ifndef HAVE_REALTIME	200	#ifndef EV_USE_KQUEUE
29	# 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
30	#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 */
31		294
32	#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) */
33	#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 */
34		298
35	#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
36		309
37	struct ev_watcher {	310	#define expect_false(expr) expect ((expr) != 0, 0)
38	EV_WATCHER (ev_watcher);	311	#define expect_true(expr) expect ((expr) != 0, 1)
39	};	312	#define inline_size static inline
40		313
41	struct ev_watcher_list {	314	#if EV_MINIMAL
42	EV_WATCHER_LIST (ev_watcher_list);	315	# define inline_speed static noinline
43	};	316	#else
		317	# define inline_speed static inline
		318	#endif
44		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
45	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
		328	typedef ev_watcher_time *WT;
47		329
48	static ev_tstamp now, diff; /* monotonic clock */	330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
		336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
		338
		339	#ifdef _WIN32
		340	# include "ev_win32.c"
		341	#endif
		342
		343	/*****************************************************************************/
		344
		345	static void (*syserr_cb)(const char *msg);
		346
		347	void
		348	ev_set_syserr_cb (void (*cb)(const char *msg))
		349	{
		350	syserr_cb = cb;
		351	}
		352
		353	static void noinline
		354	syserr (const char *msg)
		355	{
		356	if (!msg)
		357	msg = "(libev) system error";
		358
		359	if (syserr_cb)
		360	syserr_cb (msg);
		361	else
		362	{
		363	perror (msg);
		364	abort ();
		365	}
		366	}
		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
		383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		384
		385	void
		386	ev_set_allocator (void *(*cb)(void *ptr, long size))
		387	{
		388	alloc = cb;
		389	}
		390
		391	inline_speed void *
		392	ev_realloc (void *ptr, long size)
		393	{
		394	ptr = alloc (ptr, size);
		395
		396	if (!ptr && size)
		397	{
		398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		399	abort ();
		400	}
		401
		402	return ptr;
		403	}
		404
		405	#define ev_malloc(size) ev_realloc (0, (size))
		406	#define ev_free(ptr) ev_realloc ((ptr), 0)
		407
		408	/*****************************************************************************/
		409
		410	typedef struct
		411	{
		412	WL head;
		413	unsigned char events;
		414	unsigned char reify;
		415	#if EV_SELECT_IS_WINSOCKET
		416	SOCKET handle;
		417	#endif
		418	} ANFD;
		419
		420	typedef struct
		421	{
		422	W w;
		423	int events;
		424	} ANPENDING;
		425
		426	#if EV_USE_INOTIFY
		427	typedef struct
		428	{
		429	WL head;
		430	} ANFS;
		431	#endif
		432
		433	#if EV_MULTIPLICITY
		434
		435	struct ev_loop
		436	{
		437	ev_tstamp ev_rt_now;
		438	#define ev_rt_now ((loop)->ev_rt_now)
		439	#define VAR(name,decl) decl;
		440	#include "ev_vars.h"
		441	#undef VAR
		442	};
		443	#include "ev_wrap.h"
		444
		445	static struct ev_loop default_loop_struct;
		446	struct ev_loop *ev_default_loop_ptr;
		447
		448	#else
		449
49	ev_tstamp ev_now;	450	ev_tstamp ev_rt_now;
50	int ev_method;	451	#define VAR(name,decl) static decl;
		452	#include "ev_vars.h"
		453	#undef VAR
51		454
52	static int have_monotonic; /* runtime */	455	static int ev_default_loop_ptr;
53		456
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	457	#endif
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		458
58	/*****************************************************************************/	459	/*****************************************************************************/
59		460
60	ev_tstamp	461	ev_tstamp
61	ev_time (void)	462	ev_time (void)
62	{	463	{
63	#if HAVE_REALTIME	464	#if EV_USE_REALTIME
64	struct timespec ts;	465	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	466	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	467	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	468	#else
68	struct timeval tv;	469	struct timeval tv;
69	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	472	#endif
72	}	473	}
73		474
74	static ev_tstamp	475	ev_tstamp inline_size
75	get_clock (void)	476	get_clock (void)
76	{	477	{
77	#if HAVE_MONOTONIC	478	#if EV_USE_MONOTONIC
78	if (have_monotonic)	479	if (expect_true (have_monotonic))
79	{	480	{
80	struct timespec ts;	481	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	482	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	483	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	484	}
84	#endif	485	#endif
85		486
86	return ev_time ();	487	return ev_time ();
87	}	488	}
88		489
89	#define array_needsize(base,cur,cnt,init) \	490	#if EV_MULTIPLICITY
90	if ((cnt) > cur) \	491	ev_tstamp
91	{ \	492	ev_now (EV_P)
92	int newcnt = cur ? cur << 1 : 16; \	493	{
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	494	return ev_rt_now;
94	base = realloc (base, sizeof (*base) * (newcnt)); \	495	}
95	init (base + cur, newcnt - cur); \	496	#endif
96	cur = newcnt; \	497
		498	void
		499	ev_sleep (ev_tstamp delay)
		500	{
		501	if (delay > 0.)
97	}	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	}
98		522
99	/*****************************************************************************/	523	/*****************************************************************************/
100		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
		555	#define array_needsize(type,base,cur,cnt,init) \
		556	if (expect_false ((cnt) > (cur))) \
		557	{ \
		558	int ocur_ = (cur); \
		559	(base) = (type *)array_realloc \
		560	(sizeof (type), (base), &(cur), (cnt)); \
		561	init ((base) + (ocur_), (cur) - ocur_); \
		562	}
		563
		564	#if 0
		565	#define array_slim(type,stem) \
		566	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		567	{ \
		568	stem ## max = array_roundsize (stem ## cnt >> 1); \
		569	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		570	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		571	}
		572	#endif
		573
		574	#define array_free(stem, idx) \
		575	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		576
		577	/*****************************************************************************/
		578
		579	void noinline
		580	ev_feed_event (EV_P_ void *w, int revents)
		581	{
		582	W w_ = (W)w;
		583	int pri = ABSPRI (w_);
		584
		585	if (expect_false (w_->pending))
		586	pendings [pri][w_->pending - 1].events |= revents;
		587	else
		588	{
		589	w_->pending = ++pendingcnt [pri];
		590	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		591	pendings [pri][w_->pending - 1].w = w_;
		592	pendings [pri][w_->pending - 1].events = revents;
		593	}
		594	}
		595
		596	void inline_speed
		597	queue_events (EV_P_ W *events, int eventcnt, int type)
		598	{
		599	int i;
		600
		601	for (i = 0; i < eventcnt; ++i)
		602	ev_feed_event (EV_A_ events [i], type);
		603	}
		604
		605	/*****************************************************************************/
		606
		607	void inline_size
		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);
		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	/* towards the root */
		765	void inline_speed
		766	upheap (WT *heap, int k)
		767	{
		768	WT w = heap [k];
		769
		770	for (;;)
		771	{
		772	int p = k >> 1;
		773
		774	/* maybe we could use a dummy element at heap [0]? */
		775	if (!p || heap [p]->at <= w->at)
		776	break;
		777
		778	heap [k] = heap [p];
		779	ev_active (heap [k]) = k;
		780	k = p;
		781	}
		782
		783	heap [k] = w;
		784	ev_active (heap [k]) = k;
		785	}
		786
		787	/* away from the root */
		788	void inline_speed
		789	downheap (WT *heap, int N, int k)
		790	{
		791	WT w = heap [k];
		792
		793	for (;;)
		794	{
		795	int c = k << 1;
		796
		797	if (c > N)
		798	break;
		799
		800	c += c < N && heap [c]->at > heap [c + 1]->at
		801	? 1 : 0;
		802
		803	if (w->at <= heap [c]->at)
		804	break;
		805
		806	heap [k] = heap [c];
		807	ev_active (heap [k]) = k;
		808
		809	k = c;
		810	}
		811
		812	heap [k] = w;
		813	ev_active (heap [k]) = k;
		814	}
		815
		816	void inline_size
		817	adjustheap (WT *heap, int N, int k)
		818	{
		819	upheap (heap, k);
		820	downheap (heap, N, k);
		821	}
		822
		823	/*****************************************************************************/
		824
101	typedef struct	825	typedef struct
102	{	826	{
103	struct ev_io *head;	827	WL head;
104	unsigned char wev, rev; /* want, received event set */	828	EV_ATOMIC_T gotsig;
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void
114	anfds_init (ANFD *base, int count)
115	{
116	while (count--)
117	{
118	base->head = 0;
119	base->wev = base->rev = EV_NONE;
120	++base;
121	}
122	}
123
124	typedef struct
125	{
126	W w;
127	int events;
128	} ANPENDING;
129
130	static ANPENDING *pendings;
131	static int pendingmax, pendingcnt;
132
133	static void
134	event (W w, int events)
135	{
136	w->pending = ++pendingcnt;
137	array_needsize (pendings, pendingmax, pendingcnt, );
138	pendings [pendingcnt - 1].w = w;
139	pendings [pendingcnt - 1].events = events;
140	}
141
142	static void
143	fd_event (int fd, int events)
144	{
145	ANFD *anfd = anfds + fd;
146	struct ev_io *w;
147
148	for (w = anfd->head; w; w = w->next)
149	{
150	int ev = w->events & events;
151
152	if (ev)
153	event ((W)w, ev);
154	}
155	}
156
157	static void
158	queue_events (W *events, int eventcnt, int type)
159	{
160	int i;
161
162	for (i = 0; i < eventcnt; ++i)
163	event (events [i], type);
164	}
165
166	/*****************************************************************************/
167
168	static struct ev_timer **atimers;
169	static int atimermax, atimercnt;
170
171	static struct ev_timer **rtimers;
172	static int rtimermax, rtimercnt;
173
174	static void
175	upheap (struct ev_timer **timers, int k)
176	{
177	struct ev_timer *w = timers [k];
178
179	while (k && timers [k >> 1]->at > w->at)
180	{
181	timers [k] = timers [k >> 1];
182	timers [k]->active = k + 1;
183	k >>= 1;
184	}
185
186	timers [k] = w;
187	timers [k]->active = k + 1;
188
189	}
190
191	static void
192	downheap (struct ev_timer **timers, int N, int k)
193	{
194	struct ev_timer *w = timers [k];
195
196	while (k < (N >> 1))
197	{
198	int j = k << 1;
199
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
201	++j;
202
203	if (w->at <= timers [j]->at)
204	break;
205
206	timers [k] = timers [j];
207	timers [k]->active = k + 1;
208	k = j;
209	}
210
211	timers [k] = w;
212	timers [k]->active = k + 1;
213	}
214
215	/*****************************************************************************/
216
217	typedef struct
218	{
219	struct ev_signal *head;
220	sig_atomic_t gotsig;
221	} ANSIG;	829	} ANSIG;
222		830
223	static ANSIG *signals;	831	static ANSIG *signals;
224	static int signalmax;	832	static int signalmax;
225		833
226	static int sigpipe [2];	834	static EV_ATOMIC_T gotsig;
227	static sig_atomic_t gotsig;
228	static struct ev_io sigev;
229		835
230	static void	836	void inline_size
231	signals_init (ANSIG *base, int count)	837	signals_init (ANSIG *base, int count)
232	{	838	{
233	while (count--)	839	while (count--)
234	{	840	{
235	base->head = 0;	841	base->head = 0;
236	base->gotsig = 0;	842	base->gotsig = 0;
		843
237	++base;	844	++base;
238	}	845	}
239	}	846	}
240		847
		848	/*****************************************************************************/
		849
		850	void inline_speed
		851	fd_intern (int fd)
		852	{
		853	#ifdef _WIN32
		854	int arg = 1;
		855	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		856	#else
		857	fcntl (fd, F_SETFD, FD_CLOEXEC);
		858	fcntl (fd, F_SETFL, O_NONBLOCK);
		859	#endif
		860	}
		861
		862	static void noinline
		863	evpipe_init (EV_P)
		864	{
		865	if (!ev_is_active (&pipeev))
		866	{
		867	#if EV_USE_EVENTFD
		868	if ((evfd = eventfd (0, 0)) >= 0)
		869	{
		870	evpipe [0] = -1;
		871	fd_intern (evfd);
		872	ev_io_set (&pipeev, evfd, EV_READ);
		873	}
		874	else
		875	#endif
		876	{
		877	while (pipe (evpipe))
		878	syserr ("(libev) error creating signal/async pipe");
		879
		880	fd_intern (evpipe [0]);
		881	fd_intern (evpipe [1]);
		882	ev_io_set (&pipeev, evpipe [0], EV_READ);
		883	}
		884
		885	ev_io_start (EV_A_ &pipeev);
		886	ev_unref (EV_A); /* watcher should not keep loop alive */
		887	}
		888	}
		889
		890	void inline_size
		891	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		892	{
		893	if (!*flag)
		894	{
		895	int old_errno = errno; /* save errno because write might clobber it */
		896
		897	*flag = 1;
		898
		899	#if EV_USE_EVENTFD
		900	if (evfd >= 0)
		901	{
		902	uint64_t counter = 1;
		903	write (evfd, &counter, sizeof (uint64_t));
		904	}
		905	else
		906	#endif
		907	write (evpipe [1], &old_errno, 1);
		908
		909	errno = old_errno;
		910	}
		911	}
		912
241	static void	913	static void
		914	pipecb (EV_P_ ev_io *iow, int revents)
		915	{
		916	#if EV_USE_EVENTFD
		917	if (evfd >= 0)
		918	{
		919	uint64_t counter;
		920	read (evfd, &counter, sizeof (uint64_t));
		921	}
		922	else
		923	#endif
		924	{
		925	char dummy;
		926	read (evpipe [0], &dummy, 1);
		927	}
		928
		929	if (gotsig && ev_is_default_loop (EV_A))
		930	{
		931	int signum;
		932	gotsig = 0;
		933
		934	for (signum = signalmax; signum--; )
		935	if (signals [signum].gotsig)
		936	ev_feed_signal_event (EV_A_ signum + 1);
		937	}
		938
		939	#if EV_ASYNC_ENABLE
		940	if (gotasync)
		941	{
		942	int i;
		943	gotasync = 0;
		944
		945	for (i = asynccnt; i--; )
		946	if (asyncs [i]->sent)
		947	{
		948	asyncs [i]->sent = 0;
		949	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		950	}
		951	}
		952	#endif
		953	}
		954
		955	/*****************************************************************************/
		956
		957	static void
242	sighandler (int signum)	958	ev_sighandler (int signum)
243	{	959	{
		960	#if EV_MULTIPLICITY
		961	struct ev_loop *loop = &default_loop_struct;
		962	#endif
		963
		964	#if _WIN32
		965	signal (signum, ev_sighandler);
		966	#endif
		967
244	signals [signum - 1].gotsig = 1;	968	signals [signum - 1].gotsig = 1;
		969	evpipe_write (EV_A_ &gotsig);
		970	}
245		971
246	if (!gotsig)	972	void noinline
		973	ev_feed_signal_event (EV_P_ int signum)
		974	{
		975	WL w;
		976
		977	#if EV_MULTIPLICITY
		978	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		979	#endif
		980
		981	--signum;
		982
		983	if (signum < 0 || signum >= signalmax)
		984	return;
		985
		986	signals [signum].gotsig = 0;
		987
		988	for (w = signals [signum].head; w; w = w->next)
		989	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		990	}
		991
		992	/*****************************************************************************/
		993
		994	static WL childs [EV_PID_HASHSIZE];
		995
		996	#ifndef _WIN32
		997
		998	static ev_signal childev;
		999
		1000	#ifndef WIFCONTINUED
		1001	# define WIFCONTINUED(status) 0
		1002	#endif
		1003
		1004	void inline_speed
		1005	child_reap (EV_P_ int chain, int pid, int status)
		1006	{
		1007	ev_child *w;
		1008	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1009
		1010	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1011	{
		1012	if ((w->pid == pid || !w->pid)
		1013	&& (!traced || (w->flags & 1)))
		1014	{
		1015	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1016	w->rpid = pid;
		1017	w->rstatus = status;
		1018	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1019	}
		1020	}
		1021	}
		1022
		1023	#ifndef WCONTINUED
		1024	# define WCONTINUED 0
		1025	#endif
		1026
		1027	static void
		1028	childcb (EV_P_ ev_signal *sw, int revents)
		1029	{
		1030	int pid, status;
		1031
		1032	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1033	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		1034	if (!WCONTINUED
		1035	|| errno != EINVAL
		1036	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1037	return;
		1038
		1039	/* make sure we are called again until all children have been reaped */
		1040	/* we need to do it this way so that the callback gets called before we continue */
		1041	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1042
		1043	child_reap (EV_A_ pid, pid, status);
		1044	if (EV_PID_HASHSIZE > 1)
		1045	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1046	}
		1047
		1048	#endif
		1049
		1050	/*****************************************************************************/
		1051
		1052	#if EV_USE_PORT
		1053	# include "ev_port.c"
		1054	#endif
		1055	#if EV_USE_KQUEUE
		1056	# include "ev_kqueue.c"
		1057	#endif
		1058	#if EV_USE_EPOLL
		1059	# include "ev_epoll.c"
		1060	#endif
		1061	#if EV_USE_POLL
		1062	# include "ev_poll.c"
		1063	#endif
		1064	#if EV_USE_SELECT
		1065	# include "ev_select.c"
		1066	#endif
		1067
		1068	int
		1069	ev_version_major (void)
		1070	{
		1071	return EV_VERSION_MAJOR;
		1072	}
		1073
		1074	int
		1075	ev_version_minor (void)
		1076	{
		1077	return EV_VERSION_MINOR;
		1078	}
		1079
		1080	/* return true if we are running with elevated privileges and should ignore env variables */
		1081	int inline_size
		1082	enable_secure (void)
		1083	{
		1084	#ifdef _WIN32
		1085	return 0;
		1086	#else
		1087	return getuid () != geteuid ()
		1088	|| getgid () != getegid ();
		1089	#endif
		1090	}
		1091
		1092	unsigned int
		1093	ev_supported_backends (void)
		1094	{
		1095	unsigned int flags = 0;
		1096
		1097	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1098	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1099	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1100	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1101	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1102
		1103	return flags;
		1104	}
		1105
		1106	unsigned int
		1107	ev_recommended_backends (void)
		1108	{
		1109	unsigned int flags = ev_supported_backends ();
		1110
		1111	#ifndef __NetBSD__
		1112	/* kqueue is borked on everything but netbsd apparently */
		1113	/* it usually doesn't work correctly on anything but sockets and pipes */
		1114	flags &= ~EVBACKEND_KQUEUE;
		1115	#endif
		1116	#ifdef __APPLE__
		1117	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1118	flags &= ~EVBACKEND_POLL;
		1119	#endif
		1120
		1121	return flags;
		1122	}
		1123
		1124	unsigned int
		1125	ev_embeddable_backends (void)
		1126	{
		1127	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1128
		1129	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1130	/* please fix it and tell me how to detect the fix */
		1131	flags &= ~EVBACKEND_EPOLL;
		1132
		1133	return flags;
		1134	}
		1135
		1136	unsigned int
		1137	ev_backend (EV_P)
		1138	{
		1139	return backend;
		1140	}
		1141
		1142	unsigned int
		1143	ev_loop_count (EV_P)
		1144	{
		1145	return loop_count;
		1146	}
		1147
		1148	void
		1149	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1150	{
		1151	io_blocktime = interval;
		1152	}
		1153
		1154	void
		1155	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1156	{
		1157	timeout_blocktime = interval;
		1158	}
		1159
		1160	static void noinline
		1161	loop_init (EV_P_ unsigned int flags)
		1162	{
		1163	if (!backend)
		1164	{
		1165	#if EV_USE_MONOTONIC
247	{	1166	{
		1167	struct timespec ts;
		1168	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1169	have_monotonic = 1;
		1170	}
		1171	#endif
		1172
		1173	ev_rt_now = ev_time ();
		1174	mn_now = get_clock ();
		1175	now_floor = mn_now;
		1176	rtmn_diff = ev_rt_now - mn_now;
		1177
		1178	io_blocktime = 0.;
		1179	timeout_blocktime = 0.;
		1180	backend = 0;
		1181	backend_fd = -1;
		1182	gotasync = 0;
		1183	#if EV_USE_INOTIFY
		1184	fs_fd = -2;
		1185	#endif
		1186
		1187	/* pid check not overridable via env */
		1188	#ifndef _WIN32
		1189	if (flags & EVFLAG_FORKCHECK)
		1190	curpid = getpid ();
		1191	#endif
		1192
		1193	if (!(flags & EVFLAG_NOENV)
		1194	&& !enable_secure ()
		1195	&& getenv ("LIBEV_FLAGS"))
		1196	flags = atoi (getenv ("LIBEV_FLAGS"));
		1197
		1198	if (!(flags & 0x0000ffffU))
		1199	flags |= ev_recommended_backends ();
		1200
		1201	#if EV_USE_PORT
		1202	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1203	#endif
		1204	#if EV_USE_KQUEUE
		1205	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1206	#endif
		1207	#if EV_USE_EPOLL
		1208	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1209	#endif
		1210	#if EV_USE_POLL
		1211	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1212	#endif
		1213	#if EV_USE_SELECT
		1214	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1215	#endif
		1216
		1217	ev_init (&pipeev, pipecb);
		1218	ev_set_priority (&pipeev, EV_MAXPRI);
		1219	}
		1220	}
		1221
		1222	static void noinline
		1223	loop_destroy (EV_P)
		1224	{
		1225	int i;
		1226
		1227	if (ev_is_active (&pipeev))
		1228	{
		1229	ev_ref (EV_A); /* signal watcher */
		1230	ev_io_stop (EV_A_ &pipeev);
		1231
		1232	#if EV_USE_EVENTFD
		1233	if (evfd >= 0)
		1234	close (evfd);
		1235	#endif
		1236
		1237	if (evpipe [0] >= 0)
		1238	{
		1239	close (evpipe [0]);
		1240	close (evpipe [1]);
		1241	}
		1242	}
		1243
		1244	#if EV_USE_INOTIFY
		1245	if (fs_fd >= 0)
		1246	close (fs_fd);
		1247	#endif
		1248
		1249	if (backend_fd >= 0)
		1250	close (backend_fd);
		1251
		1252	#if EV_USE_PORT
		1253	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1254	#endif
		1255	#if EV_USE_KQUEUE
		1256	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1257	#endif
		1258	#if EV_USE_EPOLL
		1259	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1260	#endif
		1261	#if EV_USE_POLL
		1262	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1263	#endif
		1264	#if EV_USE_SELECT
		1265	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1266	#endif
		1267
		1268	for (i = NUMPRI; i--; )
		1269	{
		1270	array_free (pending, [i]);
		1271	#if EV_IDLE_ENABLE
		1272	array_free (idle, [i]);
		1273	#endif
		1274	}
		1275
		1276	ev_free (anfds); anfdmax = 0;
		1277
		1278	/* have to use the microsoft-never-gets-it-right macro */
		1279	array_free (fdchange, EMPTY);
		1280	array_free (timer, EMPTY);
		1281	#if EV_PERIODIC_ENABLE
		1282	array_free (periodic, EMPTY);
		1283	#endif
		1284	#if EV_FORK_ENABLE
		1285	array_free (fork, EMPTY);
		1286	#endif
		1287	array_free (prepare, EMPTY);
		1288	array_free (check, EMPTY);
		1289	#if EV_ASYNC_ENABLE
		1290	array_free (async, EMPTY);
		1291	#endif
		1292
		1293	backend = 0;
		1294	}
		1295
		1296	#if EV_USE_INOTIFY
		1297	void inline_size infy_fork (EV_P);
		1298	#endif
		1299
		1300	void inline_size
		1301	loop_fork (EV_P)
		1302	{
		1303	#if EV_USE_PORT
		1304	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1305	#endif
		1306	#if EV_USE_KQUEUE
		1307	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1308	#endif
		1309	#if EV_USE_EPOLL
		1310	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1311	#endif
		1312	#if EV_USE_INOTIFY
		1313	infy_fork (EV_A);
		1314	#endif
		1315
		1316	if (ev_is_active (&pipeev))
		1317	{
		1318	/* this "locks" the handlers against writing to the pipe */
		1319	/* while we modify the fd vars */
248	gotsig = 1;	1320	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	1321	#if EV_ASYNC_ENABLE
		1322	gotasync = 1;
		1323	#endif
		1324
		1325	ev_ref (EV_A);
		1326	ev_io_stop (EV_A_ &pipeev);
		1327
		1328	#if EV_USE_EVENTFD
		1329	if (evfd >= 0)
		1330	close (evfd);
		1331	#endif
		1332
		1333	if (evpipe [0] >= 0)
		1334	{
		1335	close (evpipe [0]);
		1336	close (evpipe [1]);
		1337	}
		1338
		1339	evpipe_init (EV_A);
		1340	/* now iterate over everything, in case we missed something */
		1341	pipecb (EV_A_ &pipeev, EV_READ);
		1342	}
		1343
		1344	postfork = 0;
		1345	}
		1346
		1347	#if EV_MULTIPLICITY
		1348	struct ev_loop *
		1349	ev_loop_new (unsigned int flags)
		1350	{
		1351	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1352
		1353	memset (loop, 0, sizeof (struct ev_loop));
		1354
		1355	loop_init (EV_A_ flags);
		1356
		1357	if (ev_backend (EV_A))
		1358	return loop;
		1359
		1360	return 0;
		1361	}
		1362
		1363	void
		1364	ev_loop_destroy (EV_P)
		1365	{
		1366	loop_destroy (EV_A);
		1367	ev_free (loop);
		1368	}
		1369
		1370	void
		1371	ev_loop_fork (EV_P)
		1372	{
		1373	postfork = 1; /* must be in line with ev_default_fork */
		1374	}
		1375
		1376	#endif
		1377
		1378	#if EV_MULTIPLICITY
		1379	struct ev_loop *
		1380	ev_default_loop_init (unsigned int flags)
		1381	#else
		1382	int
		1383	ev_default_loop (unsigned int flags)
		1384	#endif
		1385	{
		1386	if (!ev_default_loop_ptr)
250	}	1387	{
251	}	1388	#if EV_MULTIPLICITY
		1389	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1390	#else
		1391	ev_default_loop_ptr = 1;
		1392	#endif
252		1393
253	static void	1394	loop_init (EV_A_ flags);
254	sigcb (struct ev_io *iow, int revents)	1395
		1396	if (ev_backend (EV_A))
		1397	{
		1398	#ifndef _WIN32
		1399	ev_signal_init (&childev, childcb, SIGCHLD);
		1400	ev_set_priority (&childev, EV_MAXPRI);
		1401	ev_signal_start (EV_A_ &childev);
		1402	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1403	#endif
		1404	}
		1405	else
		1406	ev_default_loop_ptr = 0;
		1407	}
		1408
		1409	return ev_default_loop_ptr;
		1410	}
		1411
		1412	void
		1413	ev_default_destroy (void)
255	{	1414	{
256	struct ev_signal *w;	1415	#if EV_MULTIPLICITY
		1416	struct ev_loop *loop = ev_default_loop_ptr;
		1417	#endif
		1418
		1419	#ifndef _WIN32
		1420	ev_ref (EV_A); /* child watcher */
		1421	ev_signal_stop (EV_A_ &childev);
		1422	#endif
		1423
		1424	loop_destroy (EV_A);
		1425	}
		1426
		1427	void
		1428	ev_default_fork (void)
		1429	{
		1430	#if EV_MULTIPLICITY
		1431	struct ev_loop *loop = ev_default_loop_ptr;
		1432	#endif
		1433
		1434	if (backend)
		1435	postfork = 1; /* must be in line with ev_loop_fork */
		1436	}
		1437
		1438	/*****************************************************************************/
		1439
		1440	void
		1441	ev_invoke (EV_P_ void *w, int revents)
		1442	{
		1443	EV_CB_INVOKE ((W)w, revents);
		1444	}
		1445
		1446	void inline_speed
		1447	call_pending (EV_P)
		1448	{
257	int sig;	1449	int pri;
258		1450
259	gotsig = 0;	1451	for (pri = NUMPRI; pri--; )
260	read (sigpipe [0], &revents, 1);	1452	while (pendingcnt [pri])
261
262	for (sig = signalmax; sig--; )
263	if (signals [sig].gotsig)
264	{	1453	{
265	signals [sig].gotsig = 0;	1454	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
266		1455
267	for (w = signals [sig].head; w; w = w->next)	1456	if (expect_true (p->w))
268	event ((W)w, EV_SIGNAL);	1457	{
		1458	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1459
		1460	p->w->pending = 0;
		1461	EV_CB_INVOKE (p->w, p->events);
		1462	}
269	}	1463	}
270	}	1464	}
271		1465
272	static void	1466	void inline_size
273	siginit (void)	1467	timers_reify (EV_P)
274	{	1468	{
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277
278	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
281
282	evio_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);
284	}
285
286	/*****************************************************************************/
287
288	static struct ev_idle **idles;
289	static int idlemax, idlecnt;
290
291	static struct ev_check **checks;
292	static int checkmax, checkcnt;
293
294	/*****************************************************************************/
295
296	#if HAVE_EPOLL
297	# include "ev_epoll.c"
298	#endif
299	#if HAVE_SELECT
300	# include "ev_select.c"
301	#endif
302
303	int ev_init (int flags)
304	{
305	#if HAVE_MONOTONIC
306	{
307	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;
310	}
311	#endif
312
313	ev_now = ev_time ();
314	now = get_clock ();
315	diff = ev_now - now;
316
317	if (pipe (sigpipe))
318	return 0;
319
320	ev_method = EVMETHOD_NONE;
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)
329	{
330	evw_init (&sigev, sigcb, 0);
331	siginit ();
332	}
333
334	return ev_method;
335	}
336
337	/*****************************************************************************/
338
339	void ev_prefork (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_parent (void)
345	{
346	/* nop */
347	}
348
349	void ev_postfork_child (void)
350	{
351	#if HAVE_EPOLL
352	if (ev_method == EVMETHOD_EPOLL)
353	epoll_postfork_child ();
354	#endif
355
356	evio_stop (&sigev);
357	close (sigpipe [0]);
358	close (sigpipe [1]);
359	pipe (sigpipe);
360	siginit ();
361	}
362
363	/*****************************************************************************/
364
365	static void
366	fd_reify (void)
367	{
368	int i;
369
370	for (i = 0; i < fdchangecnt; ++i)
371	{
372	int fd = fdchanges [i];
373	ANFD *anfd = anfds + fd;
374	struct ev_io *w;
375
376	int wev = 0;
377
378	for (w = anfd->head; w; w = w->next)
379	wev |= w->events;
380
381	if (anfd->wev != wev)
382	{
383	method_modify (fd, anfd->wev, wev);
384	anfd->wev = wev;
385	}
386	}
387
388	fdchangecnt = 0;
389	}
390
391	static void
392	call_pending ()
393	{
394	int i;
395
396	for (i = 0; i < pendingcnt; ++i)
397	{
398	ANPENDING *p = pendings + i;
399
400	if (p->w)
401	{
402	p->w->pending = 0;
403	p->w->cb (p->w, p->events);
404	}
405	}
406
407	pendingcnt = 0;
408	}
409
410	static void
411	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)
412	{
413	while (timercnt && timers [0]->at <= now)	1469	while (timercnt && ev_at (timers [1]) <= mn_now)
414	{	1470	{
415	struct ev_timer *w = timers [0];	1471	ev_timer *w = (ev_timer *)timers [1];
		1472
		1473	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
416		1474
417	/* first reschedule or stop timer */	1475	/* first reschedule or stop timer */
418	if (w->repeat)	1476	if (w->repeat)
419	{	1477	{
420	if (w->is_abs)	1478	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
421	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
422	else
423	w->at = now + w->repeat;
424		1479
425	assert (w->at > now);	1480	ev_at (w) += w->repeat;
		1481	if (ev_at (w) < mn_now)
		1482	ev_at (w) = mn_now;
426		1483
427	downheap (timers, timercnt, 0);	1484	downheap (timers, timercnt, 1);
428	}	1485	}
429	else	1486	else
		1487	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1488
		1489	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1490	}
		1491	}
		1492
		1493	#if EV_PERIODIC_ENABLE
		1494	void inline_size
		1495	periodics_reify (EV_P)
		1496	{
		1497	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
		1498	{
		1499	ev_periodic *w = (ev_periodic *)periodics [1];
		1500
		1501	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1502
		1503	/* first reschedule or stop timer */
		1504	if (w->reschedule_cb)
430	{	1505	{
431	evtimer_stop (w); /* nonrepeating: stop timer */	1506	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
432	--timercnt; /* maybe pass by reference instead? */	1507	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1508	downheap (periodics, periodiccnt, 1);
433	}	1509	}
		1510	else if (w->interval)
		1511	{
		1512	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1513	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1514	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1515	downheap (periodics, periodiccnt, 1);
		1516	}
		1517	else
		1518	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
434		1519
435	event ((W)w, EV_TIMEOUT);	1520	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
436	}	1521	}
437	}	1522	}
438		1523
439	static void	1524	static void noinline
440	time_update ()	1525	periodics_reschedule (EV_P)
441	{	1526	{
442	int i;	1527	int i;
443	ev_now = ev_time ();
444		1528
445	if (have_monotonic)	1529	/* adjust periodics after time jump */
		1530	for (i = 1; i <= periodiccnt; ++i)
		1531	{
		1532	ev_periodic *w = (ev_periodic *)periodics [i];
		1533
		1534	if (w->reschedule_cb)
		1535	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1536	else if (w->interval)
		1537	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
446	{	1538	}
447	ev_tstamp odiff = diff;
448		1539
449	/* detecting time jumps is much more difficult */	1540	/* now rebuild the heap */
450	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1541	for (i = periodiccnt >> 1; i--; )
		1542	downheap (periodics, periodiccnt, i);
		1543	}
		1544	#endif
		1545
		1546	#if EV_IDLE_ENABLE
		1547	void inline_size
		1548	idle_reify (EV_P)
		1549	{
		1550	if (expect_false (idleall))
		1551	{
		1552	int pri;
		1553
		1554	for (pri = NUMPRI; pri--; )
451	{	1555	{
		1556	if (pendingcnt [pri])
		1557	break;
		1558
		1559	if (idlecnt [pri])
		1560	{
		1561	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1562	break;
		1563	}
		1564	}
		1565	}
		1566	}
		1567	#endif
		1568
		1569	void inline_speed
		1570	time_update (EV_P_ ev_tstamp max_block)
		1571	{
		1572	int i;
		1573
		1574	#if EV_USE_MONOTONIC
		1575	if (expect_true (have_monotonic))
		1576	{
		1577	ev_tstamp odiff = rtmn_diff;
		1578
452	now = get_clock ();	1579	mn_now = get_clock ();
		1580
		1581	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1582	/* interpolate in the meantime */
		1583	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1584	{
		1585	ev_rt_now = rtmn_diff + mn_now;
		1586	return;
		1587	}
		1588
		1589	now_floor = mn_now;
		1590	ev_rt_now = ev_time ();
		1591
		1592	/* loop a few times, before making important decisions.
		1593	* on the choice of "4": one iteration isn't enough,
		1594	* in case we get preempted during the calls to
		1595	* ev_time and get_clock. a second call is almost guaranteed
		1596	* to succeed in that case, though. and looping a few more times
		1597	* doesn't hurt either as we only do this on time-jumps or
		1598	* in the unlikely event of having been preempted here.
		1599	*/
		1600	for (i = 4; --i; )
		1601	{
453	diff = ev_now - now;	1602	rtmn_diff = ev_rt_now - mn_now;
454		1603
455	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1604	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
456	return; /* all is well */	1605	return; /* all is well */
457		1606
458	ev_now = ev_time ();	1607	ev_rt_now = ev_time ();
		1608	mn_now = get_clock ();
		1609	now_floor = mn_now;
459	}	1610	}
460		1611
461	/* time jump detected, reschedule atimers */	1612	# if EV_PERIODIC_ENABLE
462	for (i = 0; i < atimercnt; ++i)	1613	periodics_reschedule (EV_A);
		1614	# endif
		1615	/* no timer adjustment, as the monotonic clock doesn't jump */
		1616	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1617	}
		1618	else
		1619	#endif
		1620	{
		1621	ev_rt_now = ev_time ();
		1622
		1623	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
463	{	1624	{
464	struct ev_timer *w = atimers [i];	1625	#if EV_PERIODIC_ENABLE
465	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1626	periodics_reschedule (EV_A);
		1627	#endif
		1628	/* adjust timers. this is easy, as the offset is the same for all of them */
		1629	for (i = 1; i <= timercnt; ++i)
		1630	ev_at (timers [i]) += ev_rt_now - mn_now;
466	}	1631	}
467	}
468	else
469	{
470	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
471	/* time jump detected, adjust rtimers */
472	for (i = 0; i < rtimercnt; ++i)
473	rtimers [i]->at += ev_now - now;
474		1632
475	now = ev_now;	1633	mn_now = ev_rt_now;
476	}
477	}
478
479	int ev_loop_done;
480
481	void ev_loop (int flags)
482	{
483	double block;
484	ev_loop_done = flags & EVLOOP_ONESHOT;
485
486	if (checkcnt)
487	{	1634	}
488	queue_events ((W *)checks, checkcnt, EV_CHECK);	1635	}
489	call_pending ();	1636
490	}	1637	void
		1638	ev_ref (EV_P)
		1639	{
		1640	++activecnt;
		1641	}
		1642
		1643	void
		1644	ev_unref (EV_P)
		1645	{
		1646	--activecnt;
		1647	}
		1648
		1649	static int loop_done;
		1650
		1651	void
		1652	ev_loop (EV_P_ int flags)
		1653	{
		1654	loop_done = EVUNLOOP_CANCEL;
		1655
		1656	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
491		1657
492	do	1658	do
493	{	1659	{
		1660	#ifndef _WIN32
		1661	if (expect_false (curpid)) /* penalise the forking check even more */
		1662	if (expect_false (getpid () != curpid))
		1663	{
		1664	curpid = getpid ();
		1665	postfork = 1;
		1666	}
		1667	#endif
		1668
		1669	#if EV_FORK_ENABLE
		1670	/* we might have forked, so queue fork handlers */
		1671	if (expect_false (postfork))
		1672	if (forkcnt)
		1673	{
		1674	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1675	call_pending (EV_A);
		1676	}
		1677	#endif
		1678
		1679	/* queue prepare watchers (and execute them) */
		1680	if (expect_false (preparecnt))
		1681	{
		1682	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1683	call_pending (EV_A);
		1684	}
		1685
		1686	if (expect_false (!activecnt))
		1687	break;
		1688
		1689	/* we might have forked, so reify kernel state if necessary */
		1690	if (expect_false (postfork))
		1691	loop_fork (EV_A);
		1692
494	/* update fd-related kernel structures */	1693	/* update fd-related kernel structures */
495	fd_reify ();	1694	fd_reify (EV_A);
496		1695
497	/* calculate blocking time */	1696	/* calculate blocking time */
498	if (flags & EVLOOP_NONBLOCK || idlecnt)	1697	{
499	block = 0.;	1698	ev_tstamp waittime = 0.;
500	else	1699	ev_tstamp sleeptime = 0.;
		1700
		1701	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
501	{	1702	{
		1703	/* update time to cancel out callback processing overhead */
		1704	time_update (EV_A_ 1e100);
		1705
502	block = MAX_BLOCKTIME;	1706	waittime = MAX_BLOCKTIME;
503		1707
504	if (rtimercnt)	1708	if (timercnt)
505	{	1709	{
506	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1710	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
507	if (block > to) block = to;	1711	if (waittime > to) waittime = to;
508	}	1712	}
509		1713
		1714	#if EV_PERIODIC_ENABLE
510	if (atimercnt)	1715	if (periodiccnt)
511	{	1716	{
512	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1717	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
513	if (block > to) block = to;	1718	if (waittime > to) waittime = to;
514	}	1719	}
		1720	#endif
515		1721
516	if (block < 0.) block = 0.;	1722	if (expect_false (waittime < timeout_blocktime))
		1723	waittime = timeout_blocktime;
		1724
		1725	sleeptime = waittime - backend_fudge;
		1726
		1727	if (expect_true (sleeptime > io_blocktime))
		1728	sleeptime = io_blocktime;
		1729
		1730	if (sleeptime)
		1731	{
		1732	ev_sleep (sleeptime);
		1733	waittime -= sleeptime;
		1734	}
517	}	1735	}
518		1736
519	method_poll (block);	1737	++loop_count;
		1738	backend_poll (EV_A_ waittime);
520		1739
521	/* update ev_now, do magic */	1740	/* update ev_rt_now, do magic */
522	time_update ();	1741	time_update (EV_A_ waittime + sleeptime);
		1742	}
523		1743
524	/* queue pending timers and reschedule them */	1744	/* queue pending timers and reschedule them */
525	/* absolute timers first */	1745	timers_reify (EV_A); /* relative timers called last */
526	timers_reify (atimers, atimercnt, ev_now);	1746	#if EV_PERIODIC_ENABLE
527	/* relative timers second */	1747	periodics_reify (EV_A); /* absolute timers called first */
528	timers_reify (rtimers, rtimercnt, now);	1748	#endif
529		1749
		1750	#if EV_IDLE_ENABLE
530	/* queue idle watchers unless io or timers are pending */	1751	/* queue idle watchers unless other events are pending */
531	if (!pendingcnt)	1752	idle_reify (EV_A);
532	queue_events ((W *)idles, idlecnt, EV_IDLE);	1753	#endif
533		1754
534	/* queue check and possibly idle watchers */	1755	/* queue check watchers, to be executed first */
		1756	if (expect_false (checkcnt))
535	queue_events ((W *)checks, checkcnt, EV_CHECK);	1757	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
536		1758
537	call_pending ();	1759	call_pending (EV_A);
538	}	1760	}
539	while (!ev_loop_done);	1761	while (expect_true (
		1762	activecnt
		1763	&& !loop_done
		1764	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1765	));
		1766
		1767	if (loop_done == EVUNLOOP_ONE)
		1768	loop_done = EVUNLOOP_CANCEL;
		1769	}
		1770
		1771	void
		1772	ev_unloop (EV_P_ int how)
		1773	{
		1774	loop_done = how;
540	}	1775	}
541		1776
542	/*****************************************************************************/	1777	/*****************************************************************************/
543		1778
544	static void	1779	void inline_size
545	wlist_add (WL *head, WL elem)	1780	wlist_add (WL *head, WL elem)
546	{	1781	{
547	elem->next = *head;	1782	elem->next = *head;
548	*head = elem;	1783	*head = elem;
549	}	1784	}
550		1785
551	static void	1786	void inline_size
552	wlist_del (WL *head, WL elem)	1787	wlist_del (WL *head, WL elem)
553	{	1788	{
554	while (*head)	1789	while (*head)
555	{	1790	{
556	if (*head == elem)	1791	if (*head == elem)
…		…
561		1796
562	head = &(*head)->next;	1797	head = &(*head)->next;
563	}	1798	}
564	}	1799	}
565		1800
566	static void	1801	void inline_speed
		1802	clear_pending (EV_P_ W w)
		1803	{
		1804	if (w->pending)
		1805	{
		1806	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1807	w->pending = 0;
		1808	}
		1809	}
		1810
		1811	int
		1812	ev_clear_pending (EV_P_ void *w)
		1813	{
		1814	W w_ = (W)w;
		1815	int pending = w_->pending;
		1816
		1817	if (expect_true (pending))
		1818	{
		1819	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1820	w_->pending = 0;
		1821	p->w = 0;
		1822	return p->events;
		1823	}
		1824	else
		1825	return 0;
		1826	}
		1827
		1828	void inline_size
		1829	pri_adjust (EV_P_ W w)
		1830	{
		1831	int pri = w->priority;
		1832	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1833	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1834	w->priority = pri;
		1835	}
		1836
		1837	void inline_speed
567	ev_start (W w, int active)	1838	ev_start (EV_P_ W w, int active)
568	{	1839	{
569	w->pending = 0;	1840	pri_adjust (EV_A_ w);
570	w->active = active;	1841	w->active = active;
		1842	ev_ref (EV_A);
571	}	1843	}
572		1844
573	static void	1845	void inline_size
574	ev_stop (W w)	1846	ev_stop (EV_P_ W w)
575	{	1847	{
576	if (w->pending)	1848	ev_unref (EV_A);
577	pendings [w->pending - 1].w = 0;
578
579	w->active = 0;	1849	w->active = 0;
580	}	1850	}
581		1851
582	/*****************************************************************************/	1852	/*****************************************************************************/
583		1853
584	void	1854	void noinline
585	evio_start (struct ev_io *w)	1855	ev_io_start (EV_P_ ev_io *w)
		1856	{
		1857	int fd = w->fd;
		1858
		1859	if (expect_false (ev_is_active (w)))
		1860	return;
		1861
		1862	assert (("ev_io_start called with negative fd", fd >= 0));
		1863
		1864	ev_start (EV_A_ (W)w, 1);
		1865	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1866	wlist_add (&anfds[fd].head, (WL)w);
		1867
		1868	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1869	w->events &= ~EV_IOFDSET;
		1870	}
		1871
		1872	void noinline
		1873	ev_io_stop (EV_P_ ev_io *w)
		1874	{
		1875	clear_pending (EV_A_ (W)w);
		1876	if (expect_false (!ev_is_active (w)))
		1877	return;
		1878
		1879	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1880
		1881	wlist_del (&anfds[w->fd].head, (WL)w);
		1882	ev_stop (EV_A_ (W)w);
		1883
		1884	fd_change (EV_A_ w->fd, 1);
		1885	}
		1886
		1887	void noinline
		1888	ev_timer_start (EV_P_ ev_timer *w)
		1889	{
		1890	if (expect_false (ev_is_active (w)))
		1891	return;
		1892
		1893	ev_at (w) += mn_now;
		1894
		1895	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1896
		1897	ev_start (EV_A_ (W)w, ++timercnt);
		1898	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
		1899	timers [timercnt] = (WT)w;
		1900	upheap (timers, timercnt);
		1901
		1902	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		1903	}
		1904
		1905	void noinline
		1906	ev_timer_stop (EV_P_ ev_timer *w)
		1907	{
		1908	clear_pending (EV_A_ (W)w);
		1909	if (expect_false (!ev_is_active (w)))
		1910	return;
		1911
		1912	{
		1913	int active = ev_active (w);
		1914
		1915	assert (("internal timer heap corruption", timers [active] == (WT)w));
		1916
		1917	if (expect_true (active < timercnt))
		1918	{
		1919	timers [active] = timers [timercnt];
		1920	adjustheap (timers, timercnt, active);
		1921	}
		1922
		1923	--timercnt;
		1924	}
		1925
		1926	ev_at (w) -= mn_now;
		1927
		1928	ev_stop (EV_A_ (W)w);
		1929	}
		1930
		1931	void noinline
		1932	ev_timer_again (EV_P_ ev_timer *w)
586	{	1933	{
587	if (ev_is_active (w))	1934	if (ev_is_active (w))
588	return;
589
590	int fd = w->fd;
591
592	ev_start ((W)w, 1);
593	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
594	wlist_add ((WL *)&anfds[fd].head, (WL)w);
595
596	++fdchangecnt;
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = fd;
599	}
600
601	void
602	evio_stop (struct ev_io *w)
603	{
604	if (!ev_is_active (w))
605	return;
606
607	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
608	ev_stop ((W)w);
609
610	++fdchangecnt;
611	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
612	fdchanges [fdchangecnt - 1] = w->fd;
613	}
614
615	void
616	evtimer_start (struct ev_timer *w)
617	{
618	if (ev_is_active (w))
619	return;
620
621	if (w->is_abs)
622	{	1935	{
623	/* this formula differs from the one in timer_reify becuse we do not round up */
624	if (w->repeat)	1936	if (w->repeat)
625	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1937	{
		1938	ev_at (w) = mn_now + w->repeat;
		1939	adjustheap (timers, timercnt, ev_active (w));
		1940	}
		1941	else
		1942	ev_timer_stop (EV_A_ w);
		1943	}
		1944	else if (w->repeat)
		1945	{
		1946	ev_at (w) = w->repeat;
		1947	ev_timer_start (EV_A_ w);
		1948	}
		1949	}
626		1950
627	ev_start ((W)w, ++atimercnt);	1951	#if EV_PERIODIC_ENABLE
628	array_needsize (atimers, atimermax, atimercnt, );	1952	void noinline
629	atimers [atimercnt - 1] = w;	1953	ev_periodic_start (EV_P_ ev_periodic *w)
630	upheap (atimers, atimercnt - 1);	1954	{
		1955	if (expect_false (ev_is_active (w)))
		1956	return;
		1957
		1958	if (w->reschedule_cb)
		1959	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1960	else if (w->interval)
		1961	{
		1962	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1963	/* this formula differs from the one in periodic_reify because we do not always round up */
		1964	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
631	}	1965	}
632	else	1966	else
633	{	1967	ev_at (w) = w->offset;
634	w->at += now;
635		1968
636	ev_start ((W)w, ++rtimercnt);	1969	ev_start (EV_A_ (W)w, ++periodiccnt);
637	array_needsize (rtimers, rtimermax, rtimercnt, );	1970	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
638	rtimers [rtimercnt - 1] = w;	1971	periodics [periodiccnt] = (WT)w;
639	upheap (rtimers, rtimercnt - 1);	1972	upheap (periodics, periodiccnt);
640	}
641		1973
		1974	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
642	}	1975	}
643		1976
644	void	1977	void noinline
645	evtimer_stop (struct ev_timer *w)	1978	ev_periodic_stop (EV_P_ ev_periodic *w)
646	{	1979	{
		1980	clear_pending (EV_A_ (W)w);
647	if (!ev_is_active (w))	1981	if (expect_false (!ev_is_active (w)))
648	return;	1982	return;
649		1983
650	if (w->is_abs)
651	{	1984	{
652	if (w->active < atimercnt--)	1985	int active = ev_active (w);
		1986
		1987	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		1988
		1989	if (expect_true (active < periodiccnt))
653	{	1990	{
654	atimers [w->active - 1] = atimers [atimercnt];	1991	periodics [active] = periodics [periodiccnt];
655	downheap (atimers, atimercnt, w->active - 1);	1992	adjustheap (periodics, periodiccnt, active);
656	}	1993	}
		1994
		1995	--periodiccnt;
657	}	1996	}
658	else
659	{
660	if (w->active < rtimercnt--)
661	{
662	rtimers [w->active - 1] = rtimers [rtimercnt];
663	downheap (rtimers, rtimercnt, w->active - 1);
664	}
665	}
666		1997
667	ev_stop ((W)w);	1998	ev_stop (EV_A_ (W)w);
668	}	1999	}
669		2000
670	void	2001	void noinline
		2002	ev_periodic_again (EV_P_ ev_periodic *w)
		2003	{
		2004	/* TODO: use adjustheap and recalculation */
		2005	ev_periodic_stop (EV_A_ w);
		2006	ev_periodic_start (EV_A_ w);
		2007	}
		2008	#endif
		2009
		2010	#ifndef SA_RESTART
		2011	# define SA_RESTART 0
		2012	#endif
		2013
		2014	void noinline
671	evsignal_start (struct ev_signal *w)	2015	ev_signal_start (EV_P_ ev_signal *w)
672	{	2016	{
		2017	#if EV_MULTIPLICITY
		2018	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2019	#endif
673	if (ev_is_active (w))	2020	if (expect_false (ev_is_active (w)))
674	return;	2021	return;
675		2022
676	ev_start ((W)w, 1);	2023	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2024
		2025	evpipe_init (EV_A);
		2026
		2027	{
		2028	#ifndef _WIN32
		2029	sigset_t full, prev;
		2030	sigfillset (&full);
		2031	sigprocmask (SIG_SETMASK, &full, &prev);
		2032	#endif
		2033
677	array_needsize (signals, signalmax, w->signum, signals_init);	2034	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2035
		2036	#ifndef _WIN32
		2037	sigprocmask (SIG_SETMASK, &prev, 0);
		2038	#endif
		2039	}
		2040
		2041	ev_start (EV_A_ (W)w, 1);
678	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2042	wlist_add (&signals [w->signum - 1].head, (WL)w);
679		2043
680	if (!w->next)	2044	if (!((WL)w)->next)
681	{	2045	{
		2046	#if _WIN32
		2047	signal (w->signum, ev_sighandler);
		2048	#else
682	struct sigaction sa;	2049	struct sigaction sa;
683	sa.sa_handler = sighandler;	2050	sa.sa_handler = ev_sighandler;
684	sigfillset (&sa.sa_mask);	2051	sigfillset (&sa.sa_mask);
685	sa.sa_flags = 0;	2052	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
686	sigaction (w->signum, &sa, 0);	2053	sigaction (w->signum, &sa, 0);
		2054	#endif
687	}	2055	}
688	}	2056	}
689		2057
690	void	2058	void noinline
691	evsignal_stop (struct ev_signal *w)	2059	ev_signal_stop (EV_P_ ev_signal *w)
692	{	2060	{
		2061	clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	2062	if (expect_false (!ev_is_active (w)))
694	return;	2063	return;
695		2064
696	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2065	wlist_del (&signals [w->signum - 1].head, (WL)w);
697	ev_stop ((W)w);	2066	ev_stop (EV_A_ (W)w);
698		2067
699	if (!signals [w->signum - 1].head)	2068	if (!signals [w->signum - 1].head)
700	signal (w->signum, SIG_DFL);	2069	signal (w->signum, SIG_DFL);
701	}	2070	}
702		2071
703	void evidle_start (struct ev_idle *w)	2072	void
		2073	ev_child_start (EV_P_ ev_child *w)
704	{	2074	{
		2075	#if EV_MULTIPLICITY
		2076	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2077	#endif
705	if (ev_is_active (w))	2078	if (expect_false (ev_is_active (w)))
706	return;	2079	return;
707		2080
708	ev_start ((W)w, ++idlecnt);	2081	ev_start (EV_A_ (W)w, 1);
709	array_needsize (idles, idlemax, idlecnt, );	2082	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
710	idles [idlecnt - 1] = w;
711	}	2083	}
712		2084
713	void evidle_stop (struct ev_idle *w)	2085	void
		2086	ev_child_stop (EV_P_ ev_child *w)
714	{	2087	{
715	idles [w->active - 1] = idles [--idlecnt];	2088	clear_pending (EV_A_ (W)w);
		2089	if (expect_false (!ev_is_active (w)))
		2090	return;
		2091
		2092	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
716	ev_stop ((W)w);	2093	ev_stop (EV_A_ (W)w);
717	}	2094	}
718		2095
		2096	#if EV_STAT_ENABLE
		2097
		2098	# ifdef _WIN32
		2099	# undef lstat
		2100	# define lstat(a,b) _stati64 (a,b)
		2101	# endif
		2102
		2103	#define DEF_STAT_INTERVAL 5.0074891
		2104	#define MIN_STAT_INTERVAL 0.1074891
		2105
		2106	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2107
		2108	#if EV_USE_INOTIFY
		2109	# define EV_INOTIFY_BUFSIZE 8192
		2110
		2111	static void noinline
		2112	infy_add (EV_P_ ev_stat *w)
		2113	{
		2114	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);
		2115
		2116	if (w->wd < 0)
		2117	{
		2118	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2119
		2120	/* monitor some parent directory for speedup hints */
		2121	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2122	{
		2123	char path [4096];
		2124	strcpy (path, w->path);
		2125
		2126	do
		2127	{
		2128	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2129	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2130
		2131	char *pend = strrchr (path, '/');
		2132
		2133	if (!pend)
		2134	break; /* whoops, no '/', complain to your admin */
		2135
		2136	*pend = 0;
		2137	w->wd = inotify_add_watch (fs_fd, path, mask);
		2138	}
		2139	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2140	}
		2141	}
		2142	else
		2143	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2144
		2145	if (w->wd >= 0)
		2146	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2147	}
		2148
		2149	static void noinline
		2150	infy_del (EV_P_ ev_stat *w)
		2151	{
		2152	int slot;
		2153	int wd = w->wd;
		2154
		2155	if (wd < 0)
		2156	return;
		2157
		2158	w->wd = -2;
		2159	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2160	wlist_del (&fs_hash [slot].head, (WL)w);
		2161
		2162	/* remove this watcher, if others are watching it, they will rearm */
		2163	inotify_rm_watch (fs_fd, wd);
		2164	}
		2165
		2166	static void noinline
		2167	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2168	{
		2169	if (slot < 0)
		2170	/* overflow, need to check for all hahs slots */
		2171	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2172	infy_wd (EV_A_ slot, wd, ev);
		2173	else
		2174	{
		2175	WL w_;
		2176
		2177	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2178	{
		2179	ev_stat *w = (ev_stat *)w_;
		2180	w_ = w_->next; /* lets us remove this watcher and all before it */
		2181
		2182	if (w->wd == wd || wd == -1)
		2183	{
		2184	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2185	{
		2186	w->wd = -1;
		2187	infy_add (EV_A_ w); /* re-add, no matter what */
		2188	}
		2189
		2190	stat_timer_cb (EV_A_ &w->timer, 0);
		2191	}
		2192	}
		2193	}
		2194	}
		2195
		2196	static void
		2197	infy_cb (EV_P_ ev_io *w, int revents)
		2198	{
		2199	char buf [EV_INOTIFY_BUFSIZE];
		2200	struct inotify_event *ev = (struct inotify_event *)buf;
		2201	int ofs;
		2202	int len = read (fs_fd, buf, sizeof (buf));
		2203
		2204	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2205	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2206	}
		2207
		2208	void inline_size
		2209	infy_init (EV_P)
		2210	{
		2211	if (fs_fd != -2)
		2212	return;
		2213
		2214	fs_fd = inotify_init ();
		2215
		2216	if (fs_fd >= 0)
		2217	{
		2218	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2219	ev_set_priority (&fs_w, EV_MAXPRI);
		2220	ev_io_start (EV_A_ &fs_w);
		2221	}
		2222	}
		2223
		2224	void inline_size
		2225	infy_fork (EV_P)
		2226	{
		2227	int slot;
		2228
		2229	if (fs_fd < 0)
		2230	return;
		2231
		2232	close (fs_fd);
		2233	fs_fd = inotify_init ();
		2234
		2235	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2236	{
		2237	WL w_ = fs_hash [slot].head;
		2238	fs_hash [slot].head = 0;
		2239
		2240	while (w_)
		2241	{
		2242	ev_stat *w = (ev_stat *)w_;
		2243	w_ = w_->next; /* lets us add this watcher */
		2244
		2245	w->wd = -1;
		2246
		2247	if (fs_fd >= 0)
		2248	infy_add (EV_A_ w); /* re-add, no matter what */
		2249	else
		2250	ev_timer_start (EV_A_ &w->timer);
		2251	}
		2252
		2253	}
		2254	}
		2255
		2256	#endif
		2257
		2258	void
		2259	ev_stat_stat (EV_P_ ev_stat *w)
		2260	{
		2261	if (lstat (w->path, &w->attr) < 0)
		2262	w->attr.st_nlink = 0;
		2263	else if (!w->attr.st_nlink)
		2264	w->attr.st_nlink = 1;
		2265	}
		2266
		2267	static void noinline
		2268	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2269	{
		2270	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2271
		2272	/* we copy this here each the time so that */
		2273	/* prev has the old value when the callback gets invoked */
		2274	w->prev = w->attr;
		2275	ev_stat_stat (EV_A_ w);
		2276
		2277	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2278	if (
		2279	w->prev.st_dev != w->attr.st_dev
		2280	|| w->prev.st_ino != w->attr.st_ino
		2281	|| w->prev.st_mode != w->attr.st_mode
		2282	|| w->prev.st_nlink != w->attr.st_nlink
		2283	|| w->prev.st_uid != w->attr.st_uid
		2284	|| w->prev.st_gid != w->attr.st_gid
		2285	|| w->prev.st_rdev != w->attr.st_rdev
		2286	|| w->prev.st_size != w->attr.st_size
		2287	|| w->prev.st_atime != w->attr.st_atime
		2288	|| w->prev.st_mtime != w->attr.st_mtime
		2289	|| w->prev.st_ctime != w->attr.st_ctime
		2290	) {
		2291	#if EV_USE_INOTIFY
		2292	infy_del (EV_A_ w);
		2293	infy_add (EV_A_ w);
		2294	ev_stat_stat (EV_A_ w); /* avoid race... */
		2295	#endif
		2296
		2297	ev_feed_event (EV_A_ w, EV_STAT);
		2298	}
		2299	}
		2300
		2301	void
		2302	ev_stat_start (EV_P_ ev_stat *w)
		2303	{
		2304	if (expect_false (ev_is_active (w)))
		2305	return;
		2306
		2307	/* since we use memcmp, we need to clear any padding data etc. */
		2308	memset (&w->prev, 0, sizeof (ev_statdata));
		2309	memset (&w->attr, 0, sizeof (ev_statdata));
		2310
		2311	ev_stat_stat (EV_A_ w);
		2312
		2313	if (w->interval < MIN_STAT_INTERVAL)
		2314	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2315
		2316	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2317	ev_set_priority (&w->timer, ev_priority (w));
		2318
		2319	#if EV_USE_INOTIFY
		2320	infy_init (EV_A);
		2321
		2322	if (fs_fd >= 0)
		2323	infy_add (EV_A_ w);
		2324	else
		2325	#endif
		2326	ev_timer_start (EV_A_ &w->timer);
		2327
		2328	ev_start (EV_A_ (W)w, 1);
		2329	}
		2330
		2331	void
		2332	ev_stat_stop (EV_P_ ev_stat *w)
		2333	{
		2334	clear_pending (EV_A_ (W)w);
		2335	if (expect_false (!ev_is_active (w)))
		2336	return;
		2337
		2338	#if EV_USE_INOTIFY
		2339	infy_del (EV_A_ w);
		2340	#endif
		2341	ev_timer_stop (EV_A_ &w->timer);
		2342
		2343	ev_stop (EV_A_ (W)w);
		2344	}
		2345	#endif
		2346
		2347	#if EV_IDLE_ENABLE
		2348	void
		2349	ev_idle_start (EV_P_ ev_idle *w)
		2350	{
		2351	if (expect_false (ev_is_active (w)))
		2352	return;
		2353
		2354	pri_adjust (EV_A_ (W)w);
		2355
		2356	{
		2357	int active = ++idlecnt [ABSPRI (w)];
		2358
		2359	++idleall;
		2360	ev_start (EV_A_ (W)w, active);
		2361
		2362	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2363	idles [ABSPRI (w)][active - 1] = w;
		2364	}
		2365	}
		2366
		2367	void
		2368	ev_idle_stop (EV_P_ ev_idle *w)
		2369	{
		2370	clear_pending (EV_A_ (W)w);
		2371	if (expect_false (!ev_is_active (w)))
		2372	return;
		2373
		2374	{
		2375	int active = ev_active (w);
		2376
		2377	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2378	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2379
		2380	ev_stop (EV_A_ (W)w);
		2381	--idleall;
		2382	}
		2383	}
		2384	#endif
		2385
		2386	void
		2387	ev_prepare_start (EV_P_ ev_prepare *w)
		2388	{
		2389	if (expect_false (ev_is_active (w)))
		2390	return;
		2391
		2392	ev_start (EV_A_ (W)w, ++preparecnt);
		2393	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2394	prepares [preparecnt - 1] = w;
		2395	}
		2396
		2397	void
		2398	ev_prepare_stop (EV_P_ ev_prepare *w)
		2399	{
		2400	clear_pending (EV_A_ (W)w);
		2401	if (expect_false (!ev_is_active (w)))
		2402	return;
		2403
		2404	{
		2405	int active = ev_active (w);
		2406
		2407	prepares [active - 1] = prepares [--preparecnt];
		2408	ev_active (prepares [active - 1]) = active;
		2409	}
		2410
		2411	ev_stop (EV_A_ (W)w);
		2412	}
		2413
		2414	void
719	void evcheck_start (struct ev_check *w)	2415	ev_check_start (EV_P_ ev_check *w)
720	{	2416	{
721	if (ev_is_active (w))	2417	if (expect_false (ev_is_active (w)))
722	return;	2418	return;
723		2419
724	ev_start ((W)w, ++checkcnt);	2420	ev_start (EV_A_ (W)w, ++checkcnt);
725	array_needsize (checks, checkmax, checkcnt, );	2421	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
726	checks [checkcnt - 1] = w;	2422	checks [checkcnt - 1] = w;
727	}	2423	}
728		2424
		2425	void
729	void evcheck_stop (struct ev_check *w)	2426	ev_check_stop (EV_P_ ev_check *w)
730	{	2427	{
		2428	clear_pending (EV_A_ (W)w);
		2429	if (expect_false (!ev_is_active (w)))
		2430	return;
		2431
		2432	{
		2433	int active = ev_active (w);
		2434
731	checks [w->active - 1] = checks [--checkcnt];	2435	checks [active - 1] = checks [--checkcnt];
		2436	ev_active (checks [active - 1]) = active;
		2437	}
		2438
732	ev_stop ((W)w);	2439	ev_stop (EV_A_ (W)w);
733	}	2440	}
		2441
		2442	#if EV_EMBED_ENABLE
		2443	void noinline
		2444	ev_embed_sweep (EV_P_ ev_embed *w)
		2445	{
		2446	ev_loop (w->other, EVLOOP_NONBLOCK);
		2447	}
		2448
		2449	static void
		2450	embed_io_cb (EV_P_ ev_io *io, int revents)
		2451	{
		2452	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2453
		2454	if (ev_cb (w))
		2455	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2456	else
		2457	ev_loop (w->other, EVLOOP_NONBLOCK);
		2458	}
		2459
		2460	static void
		2461	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2462	{
		2463	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2464
		2465	{
		2466	struct ev_loop *loop = w->other;
		2467
		2468	while (fdchangecnt)
		2469	{
		2470	fd_reify (EV_A);
		2471	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2472	}
		2473	}
		2474	}
		2475
		2476	#if 0
		2477	static void
		2478	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2479	{
		2480	ev_idle_stop (EV_A_ idle);
		2481	}
		2482	#endif
		2483
		2484	void
		2485	ev_embed_start (EV_P_ ev_embed *w)
		2486	{
		2487	if (expect_false (ev_is_active (w)))
		2488	return;
		2489
		2490	{
		2491	struct ev_loop *loop = w->other;
		2492	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2493	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2494	}
		2495
		2496	ev_set_priority (&w->io, ev_priority (w));
		2497	ev_io_start (EV_A_ &w->io);
		2498
		2499	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2500	ev_set_priority (&w->prepare, EV_MINPRI);
		2501	ev_prepare_start (EV_A_ &w->prepare);
		2502
		2503	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2504
		2505	ev_start (EV_A_ (W)w, 1);
		2506	}
		2507
		2508	void
		2509	ev_embed_stop (EV_P_ ev_embed *w)
		2510	{
		2511	clear_pending (EV_A_ (W)w);
		2512	if (expect_false (!ev_is_active (w)))
		2513	return;
		2514
		2515	ev_io_stop (EV_A_ &w->io);
		2516	ev_prepare_stop (EV_A_ &w->prepare);
		2517
		2518	ev_stop (EV_A_ (W)w);
		2519	}
		2520	#endif
		2521
		2522	#if EV_FORK_ENABLE
		2523	void
		2524	ev_fork_start (EV_P_ ev_fork *w)
		2525	{
		2526	if (expect_false (ev_is_active (w)))
		2527	return;
		2528
		2529	ev_start (EV_A_ (W)w, ++forkcnt);
		2530	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2531	forks [forkcnt - 1] = w;
		2532	}
		2533
		2534	void
		2535	ev_fork_stop (EV_P_ ev_fork *w)
		2536	{
		2537	clear_pending (EV_A_ (W)w);
		2538	if (expect_false (!ev_is_active (w)))
		2539	return;
		2540
		2541	{
		2542	int active = ev_active (w);
		2543
		2544	forks [active - 1] = forks [--forkcnt];
		2545	ev_active (forks [active - 1]) = active;
		2546	}
		2547
		2548	ev_stop (EV_A_ (W)w);
		2549	}
		2550	#endif
		2551
		2552	#if EV_ASYNC_ENABLE
		2553	void
		2554	ev_async_start (EV_P_ ev_async *w)
		2555	{
		2556	if (expect_false (ev_is_active (w)))
		2557	return;
		2558
		2559	evpipe_init (EV_A);
		2560
		2561	ev_start (EV_A_ (W)w, ++asynccnt);
		2562	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2563	asyncs [asynccnt - 1] = w;
		2564	}
		2565
		2566	void
		2567	ev_async_stop (EV_P_ ev_async *w)
		2568	{
		2569	clear_pending (EV_A_ (W)w);
		2570	if (expect_false (!ev_is_active (w)))
		2571	return;
		2572
		2573	{
		2574	int active = ev_active (w);
		2575
		2576	asyncs [active - 1] = asyncs [--asynccnt];
		2577	ev_active (asyncs [active - 1]) = active;
		2578	}
		2579
		2580	ev_stop (EV_A_ (W)w);
		2581	}
		2582
		2583	void
		2584	ev_async_send (EV_P_ ev_async *w)
		2585	{
		2586	w->sent = 1;
		2587	evpipe_write (EV_A_ &gotasync);
		2588	}
		2589	#endif
734		2590
735	/*****************************************************************************/	2591	/*****************************************************************************/
736		2592
737	#if 0	2593	struct ev_once
		2594	{
		2595	ev_io io;
		2596	ev_timer to;
		2597	void (*cb)(int revents, void *arg);
		2598	void *arg;
		2599	};
738		2600
739	static void	2601	static void
740	sin_cb (struct ev_io *w, int revents)	2602	once_cb (EV_P_ struct ev_once *once, int revents)
741	{	2603	{
742	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2604	void (*cb)(int revents, void *arg) = once->cb;
		2605	void *arg = once->arg;
		2606
		2607	ev_io_stop (EV_A_ &once->io);
		2608	ev_timer_stop (EV_A_ &once->to);
		2609	ev_free (once);
		2610
		2611	cb (revents, arg);
743	}	2612	}
744		2613
745	static void	2614	static void
746	ocb (struct ev_timer *w, int revents)	2615	once_cb_io (EV_P_ ev_io *w, int revents)
747	{	2616	{
748	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2617	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
749	evtimer_stop (w);
750	evtimer_start (w);
751	}	2618	}
752		2619
753	static void	2620	static void
754	scb (struct ev_signal *w, int revents)	2621	once_cb_to (EV_P_ ev_timer *w, int revents)
755	{	2622	{
756	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2623	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
757	}	2624	}
758		2625
759	static void	2626	void
760	gcb (struct ev_signal *w, int revents)	2627	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
761	{	2628	{
762	fprintf (stderr, "generic %x\n", revents);	2629	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
763	}
764		2630
765	int main (void)	2631	if (expect_false (!once))
766	{
767	struct ev_io sin;
768
769	ev_init (0);
770
771	evw_init (&sin, sin_cb, 55);
772	evio_set (&sin, 0, EV_READ);
773	evio_start (&sin);
774
775	struct ev_timer t[10000];
776
777	#if 0
778	int i;
779	for (i = 0; i < 10000; ++i)
780	{
781	struct ev_timer *w = t + i;
782	evw_init (w, ocb, i);
783	evtimer_set_abs (w, drand48 (), 0.99775533);
784	evtimer_start (w);
785	if (drand48 () < 0.5)
786	evtimer_stop (w);
787	}	2632	{
788	#endif	2633	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
789
790	struct ev_timer t1;
791	evw_init (&t1, ocb, 0);
792	evtimer_set_abs (&t1, 5, 10);
793	evtimer_start (&t1);
794
795	struct ev_signal sig;
796	evw_init (&sig, scb, 65535);
797	evsignal_set (&sig, SIGQUIT);
798	evsignal_start (&sig);
799
800	struct ev_check cw;
801	evw_init (&cw, gcb, 0);
802	evcheck_start (&cw);
803
804	struct ev_idle iw;
805	evw_init (&iw, gcb, 0);
806	evidle_start (&iw);
807
808	ev_loop (0);
809
810	return 0;	2634	return;
811	}	2635	}
812		2636
813	#endif	2637	once->cb = cb;
		2638	once->arg = arg;
814		2639
		2640	ev_init (&once->io, once_cb_io);
		2641	if (fd >= 0)
		2642	{
		2643	ev_io_set (&once->io, fd, events);
		2644	ev_io_start (EV_A_ &once->io);
		2645	}
815		2646
		2647	ev_init (&once->to, once_cb_to);
		2648	if (timeout >= 0.)
		2649	{
		2650	ev_timer_set (&once->to, timeout, 0.);
		2651	ev_timer_start (EV_A_ &once->to);
		2652	}
		2653	}
816		2654
		2655	#if EV_MULTIPLICITY
		2656	#include "ev_wrap.h"
		2657	#endif
817		2658
		2659	#ifdef __cplusplus
		2660	}
		2661	#endif
		2662

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