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Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.242 by root, Fri May 9 14:07:19 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>
6	#include <stddef.h>	137	#include <stddef.h>
7		138
8	#include <stdio.h>	139	#include <stdio.h>
9		140
10	#include <assert.h>	141	#include <assert.h>
11	#include <errno.h>	142	#include <errno.h>
12	#include <sys/time.h>	143	#include <sys/types.h>
13	#include <time.h>	144	#include <time.h>
14		145
15	#define HAVE_EPOLL 1	146	#include <signal.h>
16		147
17	#ifndef HAVE_MONOTONIC	148	#ifdef EV_H
18	# ifdef CLOCK_MONOTONIC	149	# include EV_H
19	# 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
20	# endif	163	# endif
21	#endif	164	#endif
22		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
23	#ifndef HAVE_SELECT	180	#ifndef EV_USE_SELECT
24	# 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
25	#endif	189	# endif
		190	#endif
26		191
27	#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
28	# define HAVE_EPOLL 0	196	# define EV_USE_EPOLL 0
29	#endif	197	# endif
		198	#endif
30		199
31	#ifndef HAVE_REALTIME	200	#ifndef EV_USE_KQUEUE
32	# 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
33	#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 */
34		294
35	#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) */
36	#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 */
37		298
38	#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
39		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
40	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
41	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
42	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
43		329
44	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	/* hash table entry per inotify-id */
		428	typedef struct
		429	{
		430	WL head;
		431	} ANFS;
		432	#endif
		433
		434	/* Heap Entry */
		435	#define EV_HEAP_CACHE_AT 0
		436	#if EV_HEAP_CACHE_AT
		437	typedef struct {
		438	WT w;
		439	ev_tstamp at;
		440	} ANHE;
		441
		442	#define ANHE_w(he) (he).w /* access watcher, read-write */
		443	#define ANHE_at(he) (he).at /* access cached at, read-only */
		444	#define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
		445	#else
		446	typedef WT ANHE;
		447
		448	#define ANHE_w(he) (he)
		449	#define ANHE_at(he) (he)->at
		450	#define ANHE_at_set(he)
		451	#endif
		452
		453	#if EV_MULTIPLICITY
		454
		455	struct ev_loop
		456	{
		457	ev_tstamp ev_rt_now;
		458	#define ev_rt_now ((loop)->ev_rt_now)
		459	#define VAR(name,decl) decl;
		460	#include "ev_vars.h"
		461	#undef VAR
		462	};
		463	#include "ev_wrap.h"
		464
		465	static struct ev_loop default_loop_struct;
		466	struct ev_loop *ev_default_loop_ptr;
		467
		468	#else
		469
45	ev_tstamp ev_now;	470	ev_tstamp ev_rt_now;
46	int ev_method;	471	#define VAR(name,decl) static decl;
		472	#include "ev_vars.h"
		473	#undef VAR
47		474
48	static int have_monotonic; /* runtime */	475	static int ev_default_loop_ptr;
49		476
50	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	477	#endif
51	static void (*method_modify)(int fd, int oev, int nev);
52	static void (*method_poll)(ev_tstamp timeout);
53		478
54	/*****************************************************************************/	479	/*****************************************************************************/
55		480
56	ev_tstamp	481	ev_tstamp
57	ev_time (void)	482	ev_time (void)
58	{	483	{
59	#if HAVE_REALTIME	484	#if EV_USE_REALTIME
60	struct timespec ts;	485	struct timespec ts;
61	clock_gettime (CLOCK_REALTIME, &ts);	486	clock_gettime (CLOCK_REALTIME, &ts);
62	return ts.tv_sec + ts.tv_nsec * 1e-9;	487	return ts.tv_sec + ts.tv_nsec * 1e-9;
63	#else	488	#else
64	struct timeval tv;	489	struct timeval tv;
65	gettimeofday (&tv, 0);	490	gettimeofday (&tv, 0);
66	return tv.tv_sec + tv.tv_usec * 1e-6;	491	return tv.tv_sec + tv.tv_usec * 1e-6;
67	#endif	492	#endif
68	}	493	}
69		494
70	static ev_tstamp	495	ev_tstamp inline_size
71	get_clock (void)	496	get_clock (void)
72	{	497	{
73	#if HAVE_MONOTONIC	498	#if EV_USE_MONOTONIC
74	if (have_monotonic)	499	if (expect_true (have_monotonic))
75	{	500	{
76	struct timespec ts;	501	struct timespec ts;
77	clock_gettime (CLOCK_MONOTONIC, &ts);	502	clock_gettime (CLOCK_MONOTONIC, &ts);
78	return ts.tv_sec + ts.tv_nsec * 1e-9;	503	return ts.tv_sec + ts.tv_nsec * 1e-9;
79	}	504	}
80	#endif	505	#endif
81		506
82	return ev_time ();	507	return ev_time ();
83	}	508	}
84		509
85	#define array_needsize(base,cur,cnt,init) \	510	#if EV_MULTIPLICITY
86	if ((cnt) > cur) \	511	ev_tstamp
87	{ \	512	ev_now (EV_P)
88	int newcnt = cur ? cur << 1 : 16; \	513	{
89	base = realloc (base, sizeof (*base) * (newcnt)); \	514	return ev_rt_now;
90	init (base + cur, newcnt - cur); \	515	}
91	cur = newcnt; \	516	#endif
		517
		518	void
		519	ev_sleep (ev_tstamp delay)
		520	{
		521	if (delay > 0.)
92	}	522	{
		523	#if EV_USE_NANOSLEEP
		524	struct timespec ts;
		525
		526	ts.tv_sec = (time_t)delay;
		527	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		528
		529	nanosleep (&ts, 0);
		530	#elif defined(_WIN32)
		531	Sleep ((unsigned long)(delay * 1e3));
		532	#else
		533	struct timeval tv;
		534
		535	tv.tv_sec = (time_t)delay;
		536	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		537
		538	select (0, 0, 0, 0, &tv);
		539	#endif
		540	}
		541	}
93		542
94	/*****************************************************************************/	543	/*****************************************************************************/
95		544
		545	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		546
		547	int inline_size
		548	array_nextsize (int elem, int cur, int cnt)
		549	{
		550	int ncur = cur + 1;
		551
		552	do
		553	ncur <<= 1;
		554	while (cnt > ncur);
		555
		556	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		557	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		558	{
		559	ncur *= elem;
		560	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		561	ncur = ncur - sizeof (void *) * 4;
		562	ncur /= elem;
		563	}
		564
		565	return ncur;
		566	}
		567
		568	static noinline void *
		569	array_realloc (int elem, void *base, int *cur, int cnt)
		570	{
		571	*cur = array_nextsize (elem, *cur, cnt);
		572	return ev_realloc (base, elem * *cur);
		573	}
		574
		575	#define array_needsize(type,base,cur,cnt,init) \
		576	if (expect_false ((cnt) > (cur))) \
		577	{ \
		578	int ocur_ = (cur); \
		579	(base) = (type *)array_realloc \
		580	(sizeof (type), (base), &(cur), (cnt)); \
		581	init ((base) + (ocur_), (cur) - ocur_); \
		582	}
		583
		584	#if 0
		585	#define array_slim(type,stem) \
		586	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		587	{ \
		588	stem ## max = array_roundsize (stem ## cnt >> 1); \
		589	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		590	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		591	}
		592	#endif
		593
		594	#define array_free(stem, idx) \
		595	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		596
		597	/*****************************************************************************/
		598
		599	void noinline
		600	ev_feed_event (EV_P_ void *w, int revents)
		601	{
		602	W w_ = (W)w;
		603	int pri = ABSPRI (w_);
		604
		605	if (expect_false (w_->pending))
		606	pendings [pri][w_->pending - 1].events |= revents;
		607	else
		608	{
		609	w_->pending = ++pendingcnt [pri];
		610	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		611	pendings [pri][w_->pending - 1].w = w_;
		612	pendings [pri][w_->pending - 1].events = revents;
		613	}
		614	}
		615
		616	void inline_speed
		617	queue_events (EV_P_ W *events, int eventcnt, int type)
		618	{
		619	int i;
		620
		621	for (i = 0; i < eventcnt; ++i)
		622	ev_feed_event (EV_A_ events [i], type);
		623	}
		624
		625	/*****************************************************************************/
		626
		627	void inline_size
		628	anfds_init (ANFD *base, int count)
		629	{
		630	while (count--)
		631	{
		632	base->head = 0;
		633	base->events = EV_NONE;
		634	base->reify = 0;
		635
		636	++base;
		637	}
		638	}
		639
		640	void inline_speed
		641	fd_event (EV_P_ int fd, int revents)
		642	{
		643	ANFD *anfd = anfds + fd;
		644	ev_io *w;
		645
		646	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		647	{
		648	int ev = w->events & revents;
		649
		650	if (ev)
		651	ev_feed_event (EV_A_ (W)w, ev);
		652	}
		653	}
		654
		655	void
		656	ev_feed_fd_event (EV_P_ int fd, int revents)
		657	{
		658	if (fd >= 0 && fd < anfdmax)
		659	fd_event (EV_A_ fd, revents);
		660	}
		661
		662	void inline_size
		663	fd_reify (EV_P)
		664	{
		665	int i;
		666
		667	for (i = 0; i < fdchangecnt; ++i)
		668	{
		669	int fd = fdchanges [i];
		670	ANFD *anfd = anfds + fd;
		671	ev_io *w;
		672
		673	unsigned char events = 0;
		674
		675	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		676	events |= (unsigned char)w->events;
		677
		678	#if EV_SELECT_IS_WINSOCKET
		679	if (events)
		680	{
		681	unsigned long argp;
		682	#ifdef EV_FD_TO_WIN32_HANDLE
		683	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		684	#else
		685	anfd->handle = _get_osfhandle (fd);
		686	#endif
		687	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		688	}
		689	#endif
		690
		691	{
		692	unsigned char o_events = anfd->events;
		693	unsigned char o_reify = anfd->reify;
		694
		695	anfd->reify = 0;
		696	anfd->events = events;
		697
		698	if (o_events != events || o_reify & EV_IOFDSET)
		699	backend_modify (EV_A_ fd, o_events, events);
		700	}
		701	}
		702
		703	fdchangecnt = 0;
		704	}
		705
		706	void inline_size
		707	fd_change (EV_P_ int fd, int flags)
		708	{
		709	unsigned char reify = anfds [fd].reify;
		710	anfds [fd].reify |= flags;
		711
		712	if (expect_true (!reify))
		713	{
		714	++fdchangecnt;
		715	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		716	fdchanges [fdchangecnt - 1] = fd;
		717	}
		718	}
		719
		720	void inline_speed
		721	fd_kill (EV_P_ int fd)
		722	{
		723	ev_io *w;
		724
		725	while ((w = (ev_io *)anfds [fd].head))
		726	{
		727	ev_io_stop (EV_A_ w);
		728	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		729	}
		730	}
		731
		732	int inline_size
		733	fd_valid (int fd)
		734	{
		735	#ifdef _WIN32
		736	return _get_osfhandle (fd) != -1;
		737	#else
		738	return fcntl (fd, F_GETFD) != -1;
		739	#endif
		740	}
		741
		742	/* called on EBADF to verify fds */
		743	static void noinline
		744	fd_ebadf (EV_P)
		745	{
		746	int fd;
		747
		748	for (fd = 0; fd < anfdmax; ++fd)
		749	if (anfds [fd].events)
		750	if (!fd_valid (fd) == -1 && errno == EBADF)
		751	fd_kill (EV_A_ fd);
		752	}
		753
		754	/* called on ENOMEM in select/poll to kill some fds and retry */
		755	static void noinline
		756	fd_enomem (EV_P)
		757	{
		758	int fd;
		759
		760	for (fd = anfdmax; fd--; )
		761	if (anfds [fd].events)
		762	{
		763	fd_kill (EV_A_ fd);
		764	return;
		765	}
		766	}
		767
		768	/* usually called after fork if backend needs to re-arm all fds from scratch */
		769	static void noinline
		770	fd_rearm_all (EV_P)
		771	{
		772	int fd;
		773
		774	for (fd = 0; fd < anfdmax; ++fd)
		775	if (anfds [fd].events)
		776	{
		777	anfds [fd].events = 0;
		778	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		779	}
		780	}
		781
		782	/*****************************************************************************/
		783
		784	/*
		785	* the heap functions want a real array index. array index 0 uis guaranteed to not
		786	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		787	* the branching factor of the d-tree.
		788	*/
		789
		790	/*
		791	* at the moment we allow libev the luxury of two heaps,
		792	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		793	* which is more cache-efficient.
		794	* the difference is about 5% with 50000+ watchers.
		795	*/
		796	#define EV_USE_4HEAP !EV_MINIMAL
		797	#if EV_USE_4HEAP
		798
		799	#define DHEAP 4
		800	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		801
		802	/* towards the root */
		803	void inline_speed
		804	upheap (ANHE *heap, int k)
		805	{
		806	ANHE he = heap [k];
		807
		808	for (;;)
		809	{
		810	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
		811
		812	if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
		813	break;
		814
		815	heap [k] = heap [p];
		816	ev_active (ANHE_w (heap [k])) = k;
		817	k = p;
		818	}
		819
		820	ev_active (ANHE_w (he)) = k;
		821	heap [k] = he;
		822	}
		823
		824	/* away from the root */
		825	void inline_speed
		826	downheap (ANHE *heap, int N, int k)
		827	{
		828	ANHE he = heap [k];
		829	ANHE *E = heap + N + HEAP0;
		830
		831	for (;;)
		832	{
		833	ev_tstamp minat;
		834	ANHE *minpos;
		835	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
		836
		837	// find minimum child
		838	if (expect_true (pos + DHEAP - 1 < E))
		839	{
		840	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		841	if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		842	if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		843	if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		844	}
		845	else if (pos < E)
		846	{
		847	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		848	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		849	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		850	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		851	}
		852	else
		853	break;
		854
		855	if (ANHE_at (he) <= minat)
		856	break;
		857
		858	ev_active (ANHE_w (*minpos)) = k;
		859	heap [k] = *minpos;
		860
		861	k = minpos - heap;
		862	}
		863
		864	ev_active (ANHE_w (he)) = k;
		865	heap [k] = he;
		866	}
		867
		868	#else // 4HEAP
		869
		870	#define HEAP0 1
		871
		872	/* towards the root */
		873	void inline_speed
		874	upheap (ANHE *heap, int k)
		875	{
		876	ANHE he = heap [k];
		877
		878	for (;;)
		879	{
		880	int p = k >> 1;
		881
		882	/* maybe we could use a dummy element at heap [0]? */
		883	if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
		884	break;
		885
		886	heap [k] = heap [p];
		887	ev_active (ANHE_w (heap [k])) = k;
		888	k = p;
		889	}
		890
		891	heap [k] = w;
		892	ev_active (ANHE_w (heap [k])) = k;
		893	}
		894
		895	/* away from the root */
		896	void inline_speed
		897	downheap (ANHE *heap, int N, int k)
		898	{
		899	ANHE he = heap [k];
		900
		901	for (;;)
		902	{
		903	int c = k << 1;
		904
		905	if (c > N)
		906	break;
		907
		908	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		909	? 1 : 0;
		910
		911	if (w->at <= ANHE_at (heap [c]))
		912	break;
		913
		914	heap [k] = heap [c];
		915	ev_active (ANHE_w (heap [k])) = k;
		916
		917	k = c;
		918	}
		919
		920	heap [k] = he;
		921	ev_active (ANHE_w (he)) = k;
		922	}
		923	#endif
		924
		925	void inline_size
		926	adjustheap (ANHE *heap, int N, int k)
		927	{
		928	upheap (heap, k);
		929	downheap (heap, N, k);
		930	}
		931
		932	/*****************************************************************************/
		933
96	typedef struct	934	typedef struct
97	{	935	{
98	struct ev_io *head;	936	WL head;
99	unsigned char wev, rev; /* want, received event set */	937	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	if (w->active)
132	{
133	w->pending = ++pendingcnt;
134	array_needsize (pendings, pendingmax, pendingcnt, );
135	pendings [pendingcnt - 1].w = w;
136	pendings [pendingcnt - 1].events = events;
137	}
138	}
139
140	static void
141	fd_event (int fd, int events)
142	{
143	ANFD *anfd = anfds + fd;
144	struct ev_io *w;
145
146	for (w = anfd->head; w; w = w->next)
147	{
148	int ev = w->events & events;
149
150	if (ev)
151	event ((W)w, ev);
152	}
153	}
154
155	static void
156	queue_events (W *events, int eventcnt, int type)
157	{
158	int i;
159
160	for (i = 0; i < eventcnt; ++i)
161	event (events [i], type);
162	}
163
164	/*****************************************************************************/
165
166	static struct ev_timer **timers;
167	static int timermax, timercnt;
168
169	static struct ev_periodic **periodics;
170	static int periodicmax, periodiccnt;
171
172	static void
173	upheap (WT *timers, int k)
174	{
175	WT w = timers [k];
176
177	while (k && timers [k >> 1]->at > w->at)
178	{
179	timers [k] = timers [k >> 1];
180	timers [k]->active = k + 1;
181	k >>= 1;
182	}
183
184	timers [k] = w;
185	timers [k]->active = k + 1;
186
187	}
188
189	static void
190	downheap (WT *timers, int N, int k)
191	{
192	WT w = timers [k];
193
194	while (k < (N >> 1))
195	{
196	int j = k << 1;
197
198	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
199	++j;
200
201	if (w->at <= timers [j]->at)
202	break;
203
204	timers [k] = timers [j];
205	timers [k]->active = k + 1;
206	k = j;
207	}
208
209	timers [k] = w;
210	timers [k]->active = k + 1;
211	}
212
213	/*****************************************************************************/
214
215	typedef struct
216	{
217	struct ev_signal *head;
218	sig_atomic_t gotsig;
219	} ANSIG;	938	} ANSIG;
220		939
221	static ANSIG *signals;	940	static ANSIG *signals;
222	static int signalmax;	941	static int signalmax;
223		942
224	static int sigpipe [2];	943	static EV_ATOMIC_T gotsig;
225	static sig_atomic_t gotsig;
226	static struct ev_io sigev;
227		944
228	static void	945	void inline_size
229	signals_init (ANSIG *base, int count)	946	signals_init (ANSIG *base, int count)
230	{	947	{
231	while (count--)	948	while (count--)
232	{	949	{
233	base->head = 0;	950	base->head = 0;
234	base->gotsig = 0;	951	base->gotsig = 0;
		952
235	++base;	953	++base;
236	}	954	}
237	}	955	}
238		956
		957	/*****************************************************************************/
		958
		959	void inline_speed
		960	fd_intern (int fd)
		961	{
		962	#ifdef _WIN32
		963	int arg = 1;
		964	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		965	#else
		966	fcntl (fd, F_SETFD, FD_CLOEXEC);
		967	fcntl (fd, F_SETFL, O_NONBLOCK);
		968	#endif
		969	}
		970
		971	static void noinline
		972	evpipe_init (EV_P)
		973	{
		974	if (!ev_is_active (&pipeev))
		975	{
		976	#if EV_USE_EVENTFD
		977	if ((evfd = eventfd (0, 0)) >= 0)
		978	{
		979	evpipe [0] = -1;
		980	fd_intern (evfd);
		981	ev_io_set (&pipeev, evfd, EV_READ);
		982	}
		983	else
		984	#endif
		985	{
		986	while (pipe (evpipe))
		987	syserr ("(libev) error creating signal/async pipe");
		988
		989	fd_intern (evpipe [0]);
		990	fd_intern (evpipe [1]);
		991	ev_io_set (&pipeev, evpipe [0], EV_READ);
		992	}
		993
		994	ev_io_start (EV_A_ &pipeev);
		995	ev_unref (EV_A); /* watcher should not keep loop alive */
		996	}
		997	}
		998
		999	void inline_size
		1000	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1001	{
		1002	if (!*flag)
		1003	{
		1004	int old_errno = errno; /* save errno because write might clobber it */
		1005
		1006	*flag = 1;
		1007
		1008	#if EV_USE_EVENTFD
		1009	if (evfd >= 0)
		1010	{
		1011	uint64_t counter = 1;
		1012	write (evfd, &counter, sizeof (uint64_t));
		1013	}
		1014	else
		1015	#endif
		1016	write (evpipe [1], &old_errno, 1);
		1017
		1018	errno = old_errno;
		1019	}
		1020	}
		1021
239	static void	1022	static void
		1023	pipecb (EV_P_ ev_io *iow, int revents)
		1024	{
		1025	#if EV_USE_EVENTFD
		1026	if (evfd >= 0)
		1027	{
		1028	uint64_t counter;
		1029	read (evfd, &counter, sizeof (uint64_t));
		1030	}
		1031	else
		1032	#endif
		1033	{
		1034	char dummy;
		1035	read (evpipe [0], &dummy, 1);
		1036	}
		1037
		1038	if (gotsig && ev_is_default_loop (EV_A))
		1039	{
		1040	int signum;
		1041	gotsig = 0;
		1042
		1043	for (signum = signalmax; signum--; )
		1044	if (signals [signum].gotsig)
		1045	ev_feed_signal_event (EV_A_ signum + 1);
		1046	}
		1047
		1048	#if EV_ASYNC_ENABLE
		1049	if (gotasync)
		1050	{
		1051	int i;
		1052	gotasync = 0;
		1053
		1054	for (i = asynccnt; i--; )
		1055	if (asyncs [i]->sent)
		1056	{
		1057	asyncs [i]->sent = 0;
		1058	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1059	}
		1060	}
		1061	#endif
		1062	}
		1063
		1064	/*****************************************************************************/
		1065
		1066	static void
240	sighandler (int signum)	1067	ev_sighandler (int signum)
241	{	1068	{
		1069	#if EV_MULTIPLICITY
		1070	struct ev_loop *loop = &default_loop_struct;
		1071	#endif
		1072
		1073	#if _WIN32
		1074	signal (signum, ev_sighandler);
		1075	#endif
		1076
242	signals [signum - 1].gotsig = 1;	1077	signals [signum - 1].gotsig = 1;
		1078	evpipe_write (EV_A_ &gotsig);
		1079	}
243		1080
244	if (!gotsig)	1081	void noinline
		1082	ev_feed_signal_event (EV_P_ int signum)
		1083	{
		1084	WL w;
		1085
		1086	#if EV_MULTIPLICITY
		1087	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1088	#endif
		1089
		1090	--signum;
		1091
		1092	if (signum < 0 || signum >= signalmax)
		1093	return;
		1094
		1095	signals [signum].gotsig = 0;
		1096
		1097	for (w = signals [signum].head; w; w = w->next)
		1098	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1099	}
		1100
		1101	/*****************************************************************************/
		1102
		1103	static WL childs [EV_PID_HASHSIZE];
		1104
		1105	#ifndef _WIN32
		1106
		1107	static ev_signal childev;
		1108
		1109	#ifndef WIFCONTINUED
		1110	# define WIFCONTINUED(status) 0
		1111	#endif
		1112
		1113	void inline_speed
		1114	child_reap (EV_P_ int chain, int pid, int status)
		1115	{
		1116	ev_child *w;
		1117	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1118
		1119	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1120	{
		1121	if ((w->pid == pid || !w->pid)
		1122	&& (!traced || (w->flags & 1)))
		1123	{
		1124	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1125	w->rpid = pid;
		1126	w->rstatus = status;
		1127	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1128	}
		1129	}
		1130	}
		1131
		1132	#ifndef WCONTINUED
		1133	# define WCONTINUED 0
		1134	#endif
		1135
		1136	static void
		1137	childcb (EV_P_ ev_signal *sw, int revents)
		1138	{
		1139	int pid, status;
		1140
		1141	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1142	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		1143	if (!WCONTINUED
		1144	|| errno != EINVAL
		1145	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1146	return;
		1147
		1148	/* make sure we are called again until all children have been reaped */
		1149	/* we need to do it this way so that the callback gets called before we continue */
		1150	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1151
		1152	child_reap (EV_A_ pid, pid, status);
		1153	if (EV_PID_HASHSIZE > 1)
		1154	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1155	}
		1156
		1157	#endif
		1158
		1159	/*****************************************************************************/
		1160
		1161	#if EV_USE_PORT
		1162	# include "ev_port.c"
		1163	#endif
		1164	#if EV_USE_KQUEUE
		1165	# include "ev_kqueue.c"
		1166	#endif
		1167	#if EV_USE_EPOLL
		1168	# include "ev_epoll.c"
		1169	#endif
		1170	#if EV_USE_POLL
		1171	# include "ev_poll.c"
		1172	#endif
		1173	#if EV_USE_SELECT
		1174	# include "ev_select.c"
		1175	#endif
		1176
		1177	int
		1178	ev_version_major (void)
		1179	{
		1180	return EV_VERSION_MAJOR;
		1181	}
		1182
		1183	int
		1184	ev_version_minor (void)
		1185	{
		1186	return EV_VERSION_MINOR;
		1187	}
		1188
		1189	/* return true if we are running with elevated privileges and should ignore env variables */
		1190	int inline_size
		1191	enable_secure (void)
		1192	{
		1193	#ifdef _WIN32
		1194	return 0;
		1195	#else
		1196	return getuid () != geteuid ()
		1197	|| getgid () != getegid ();
		1198	#endif
		1199	}
		1200
		1201	unsigned int
		1202	ev_supported_backends (void)
		1203	{
		1204	unsigned int flags = 0;
		1205
		1206	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1207	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1208	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1209	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1210	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1211
		1212	return flags;
		1213	}
		1214
		1215	unsigned int
		1216	ev_recommended_backends (void)
		1217	{
		1218	unsigned int flags = ev_supported_backends ();
		1219
		1220	#ifndef __NetBSD__
		1221	/* kqueue is borked on everything but netbsd apparently */
		1222	/* it usually doesn't work correctly on anything but sockets and pipes */
		1223	flags &= ~EVBACKEND_KQUEUE;
		1224	#endif
		1225	#ifdef __APPLE__
		1226	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1227	flags &= ~EVBACKEND_POLL;
		1228	#endif
		1229
		1230	return flags;
		1231	}
		1232
		1233	unsigned int
		1234	ev_embeddable_backends (void)
		1235	{
		1236	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1237
		1238	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1239	/* please fix it and tell me how to detect the fix */
		1240	flags &= ~EVBACKEND_EPOLL;
		1241
		1242	return flags;
		1243	}
		1244
		1245	unsigned int
		1246	ev_backend (EV_P)
		1247	{
		1248	return backend;
		1249	}
		1250
		1251	unsigned int
		1252	ev_loop_count (EV_P)
		1253	{
		1254	return loop_count;
		1255	}
		1256
		1257	void
		1258	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1259	{
		1260	io_blocktime = interval;
		1261	}
		1262
		1263	void
		1264	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1265	{
		1266	timeout_blocktime = interval;
		1267	}
		1268
		1269	static void noinline
		1270	loop_init (EV_P_ unsigned int flags)
		1271	{
		1272	if (!backend)
		1273	{
		1274	#if EV_USE_MONOTONIC
245	{	1275	{
		1276	struct timespec ts;
		1277	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1278	have_monotonic = 1;
		1279	}
		1280	#endif
		1281
		1282	ev_rt_now = ev_time ();
		1283	mn_now = get_clock ();
		1284	now_floor = mn_now;
		1285	rtmn_diff = ev_rt_now - mn_now;
		1286
		1287	io_blocktime = 0.;
		1288	timeout_blocktime = 0.;
		1289	backend = 0;
		1290	backend_fd = -1;
		1291	gotasync = 0;
		1292	#if EV_USE_INOTIFY
		1293	fs_fd = -2;
		1294	#endif
		1295
		1296	/* pid check not overridable via env */
		1297	#ifndef _WIN32
		1298	if (flags & EVFLAG_FORKCHECK)
		1299	curpid = getpid ();
		1300	#endif
		1301
		1302	if (!(flags & EVFLAG_NOENV)
		1303	&& !enable_secure ()
		1304	&& getenv ("LIBEV_FLAGS"))
		1305	flags = atoi (getenv ("LIBEV_FLAGS"));
		1306
		1307	if (!(flags & 0x0000ffffU))
		1308	flags |= ev_recommended_backends ();
		1309
		1310	#if EV_USE_PORT
		1311	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1312	#endif
		1313	#if EV_USE_KQUEUE
		1314	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1315	#endif
		1316	#if EV_USE_EPOLL
		1317	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1318	#endif
		1319	#if EV_USE_POLL
		1320	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1321	#endif
		1322	#if EV_USE_SELECT
		1323	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1324	#endif
		1325
		1326	ev_init (&pipeev, pipecb);
		1327	ev_set_priority (&pipeev, EV_MAXPRI);
		1328	}
		1329	}
		1330
		1331	static void noinline
		1332	loop_destroy (EV_P)
		1333	{
		1334	int i;
		1335
		1336	if (ev_is_active (&pipeev))
		1337	{
		1338	ev_ref (EV_A); /* signal watcher */
		1339	ev_io_stop (EV_A_ &pipeev);
		1340
		1341	#if EV_USE_EVENTFD
		1342	if (evfd >= 0)
		1343	close (evfd);
		1344	#endif
		1345
		1346	if (evpipe [0] >= 0)
		1347	{
		1348	close (evpipe [0]);
		1349	close (evpipe [1]);
		1350	}
		1351	}
		1352
		1353	#if EV_USE_INOTIFY
		1354	if (fs_fd >= 0)
		1355	close (fs_fd);
		1356	#endif
		1357
		1358	if (backend_fd >= 0)
		1359	close (backend_fd);
		1360
		1361	#if EV_USE_PORT
		1362	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1363	#endif
		1364	#if EV_USE_KQUEUE
		1365	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1366	#endif
		1367	#if EV_USE_EPOLL
		1368	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1369	#endif
		1370	#if EV_USE_POLL
		1371	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1372	#endif
		1373	#if EV_USE_SELECT
		1374	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1375	#endif
		1376
		1377	for (i = NUMPRI; i--; )
		1378	{
		1379	array_free (pending, [i]);
		1380	#if EV_IDLE_ENABLE
		1381	array_free (idle, [i]);
		1382	#endif
		1383	}
		1384
		1385	ev_free (anfds); anfdmax = 0;
		1386
		1387	/* have to use the microsoft-never-gets-it-right macro */
		1388	array_free (fdchange, EMPTY);
		1389	array_free (timer, EMPTY);
		1390	#if EV_PERIODIC_ENABLE
		1391	array_free (periodic, EMPTY);
		1392	#endif
		1393	#if EV_FORK_ENABLE
		1394	array_free (fork, EMPTY);
		1395	#endif
		1396	array_free (prepare, EMPTY);
		1397	array_free (check, EMPTY);
		1398	#if EV_ASYNC_ENABLE
		1399	array_free (async, EMPTY);
		1400	#endif
		1401
		1402	backend = 0;
		1403	}
		1404
		1405	#if EV_USE_INOTIFY
		1406	void inline_size infy_fork (EV_P);
		1407	#endif
		1408
		1409	void inline_size
		1410	loop_fork (EV_P)
		1411	{
		1412	#if EV_USE_PORT
		1413	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1414	#endif
		1415	#if EV_USE_KQUEUE
		1416	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1417	#endif
		1418	#if EV_USE_EPOLL
		1419	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1420	#endif
		1421	#if EV_USE_INOTIFY
		1422	infy_fork (EV_A);
		1423	#endif
		1424
		1425	if (ev_is_active (&pipeev))
		1426	{
		1427	/* this "locks" the handlers against writing to the pipe */
		1428	/* while we modify the fd vars */
246	gotsig = 1;	1429	gotsig = 1;
247	write (sigpipe [1], &gotsig, 1);	1430	#if EV_ASYNC_ENABLE
		1431	gotasync = 1;
		1432	#endif
		1433
		1434	ev_ref (EV_A);
		1435	ev_io_stop (EV_A_ &pipeev);
		1436
		1437	#if EV_USE_EVENTFD
		1438	if (evfd >= 0)
		1439	close (evfd);
		1440	#endif
		1441
		1442	if (evpipe [0] >= 0)
		1443	{
		1444	close (evpipe [0]);
		1445	close (evpipe [1]);
		1446	}
		1447
		1448	evpipe_init (EV_A);
		1449	/* now iterate over everything, in case we missed something */
		1450	pipecb (EV_A_ &pipeev, EV_READ);
		1451	}
		1452
		1453	postfork = 0;
		1454	}
		1455
		1456	#if EV_MULTIPLICITY
		1457	struct ev_loop *
		1458	ev_loop_new (unsigned int flags)
		1459	{
		1460	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1461
		1462	memset (loop, 0, sizeof (struct ev_loop));
		1463
		1464	loop_init (EV_A_ flags);
		1465
		1466	if (ev_backend (EV_A))
		1467	return loop;
		1468
		1469	return 0;
		1470	}
		1471
		1472	void
		1473	ev_loop_destroy (EV_P)
		1474	{
		1475	loop_destroy (EV_A);
		1476	ev_free (loop);
		1477	}
		1478
		1479	void
		1480	ev_loop_fork (EV_P)
		1481	{
		1482	postfork = 1; /* must be in line with ev_default_fork */
		1483	}
		1484	#endif
		1485
		1486	#if EV_MULTIPLICITY
		1487	struct ev_loop *
		1488	ev_default_loop_init (unsigned int flags)
		1489	#else
		1490	int
		1491	ev_default_loop (unsigned int flags)
		1492	#endif
		1493	{
		1494	if (!ev_default_loop_ptr)
248	}	1495	{
249	}	1496	#if EV_MULTIPLICITY
		1497	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1498	#else
		1499	ev_default_loop_ptr = 1;
		1500	#endif
250		1501
251	static void	1502	loop_init (EV_A_ flags);
252	sigcb (struct ev_io *iow, int revents)	1503
		1504	if (ev_backend (EV_A))
		1505	{
		1506	#ifndef _WIN32
		1507	ev_signal_init (&childev, childcb, SIGCHLD);
		1508	ev_set_priority (&childev, EV_MAXPRI);
		1509	ev_signal_start (EV_A_ &childev);
		1510	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1511	#endif
		1512	}
		1513	else
		1514	ev_default_loop_ptr = 0;
		1515	}
		1516
		1517	return ev_default_loop_ptr;
		1518	}
		1519
		1520	void
		1521	ev_default_destroy (void)
253	{	1522	{
254	struct ev_signal *w;	1523	#if EV_MULTIPLICITY
		1524	struct ev_loop *loop = ev_default_loop_ptr;
		1525	#endif
		1526
		1527	#ifndef _WIN32
		1528	ev_ref (EV_A); /* child watcher */
		1529	ev_signal_stop (EV_A_ &childev);
		1530	#endif
		1531
		1532	loop_destroy (EV_A);
		1533	}
		1534
		1535	void
		1536	ev_default_fork (void)
		1537	{
		1538	#if EV_MULTIPLICITY
		1539	struct ev_loop *loop = ev_default_loop_ptr;
		1540	#endif
		1541
		1542	if (backend)
		1543	postfork = 1; /* must be in line with ev_loop_fork */
		1544	}
		1545
		1546	/*****************************************************************************/
		1547
		1548	void
		1549	ev_invoke (EV_P_ void *w, int revents)
		1550	{
		1551	EV_CB_INVOKE ((W)w, revents);
		1552	}
		1553
		1554	void inline_speed
		1555	call_pending (EV_P)
		1556	{
255	int sig;	1557	int pri;
256		1558
257	gotsig = 0;	1559	for (pri = NUMPRI; pri--; )
258	read (sigpipe [0], &revents, 1);	1560	while (pendingcnt [pri])
259
260	for (sig = signalmax; sig--; )
261	if (signals [sig].gotsig)
262	{	1561	{
263	signals [sig].gotsig = 0;	1562	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
264		1563
265	for (w = signals [sig].head; w; w = w->next)	1564	if (expect_true (p->w))
266	event ((W)w, EV_SIGNAL);	1565	{
		1566	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1567
		1568	p->w->pending = 0;
		1569	EV_CB_INVOKE (p->w, p->events);
		1570	}
267	}	1571	}
268	}	1572	}
269		1573
270	static void	1574	#if EV_IDLE_ENABLE
271	siginit (void)	1575	void inline_size
		1576	idle_reify (EV_P)
272	{	1577	{
273	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	1578	if (expect_false (idleall))
274	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
275
276	/* rather than sort out wether we really need nb, set it */
277	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
278	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
279
280	evio_set (&sigev, sigpipe [0], EV_READ);
281	evio_start (&sigev);
282	}
283
284	/*****************************************************************************/
285
286	static struct ev_idle **idles;
287	static int idlemax, idlecnt;
288
289	static struct ev_check **checks;
290	static int checkmax, checkcnt;
291
292	/*****************************************************************************/
293
294	#if HAVE_EPOLL
295	# include "ev_epoll.c"
296	#endif
297	#if HAVE_SELECT
298	# include "ev_select.c"
299	#endif
300
301	int ev_init (int flags)
302	{
303	#if HAVE_MONOTONIC
304	{
305	struct timespec ts;
306	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
307	have_monotonic = 1;
308	}
309	#endif
310
311	ev_now = ev_time ();
312	now = get_clock ();
313	diff = ev_now - now;
314
315	if (pipe (sigpipe))
316	return 0;
317
318	ev_method = EVMETHOD_NONE;
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
321	#endif
322	#if HAVE_SELECT
323	if (ev_method == EVMETHOD_NONE) select_init (flags);
324	#endif
325
326	if (ev_method)
327	{
328	evw_init (&sigev, sigcb);
329	siginit ();
330	}	1579	{
		1580	int pri;
331		1581
332	return ev_method;	1582	for (pri = NUMPRI; pri--; )
333	}
334
335	/*****************************************************************************/
336
337	void ev_prefork (void)
338	{
339	/* nop */
340	}
341
342	void ev_postfork_parent (void)
343	{
344	/* nop */
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif
353
354	evio_stop (&sigev);
355	close (sigpipe [0]);
356	close (sigpipe [1]);
357	pipe (sigpipe);
358	siginit ();
359	}
360
361	/*****************************************************************************/
362
363	static void
364	fd_reify (void)
365	{
366	int i;
367
368	for (i = 0; i < fdchangecnt; ++i)
369	{
370	int fd = fdchanges [i];
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373
374	int wev = 0;
375
376	for (w = anfd->head; w; w = w->next)
377	wev |= w->events;
378
379	if (anfd->wev != wev)
380	{	1583	{
381	method_modify (fd, anfd->wev, wev);	1584	if (pendingcnt [pri])
382	anfd->wev = wev;	1585	break;
		1586
		1587	if (idlecnt [pri])
		1588	{
		1589	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1590	break;
		1591	}
383	}	1592	}
384	}	1593	}
385
386	fdchangecnt = 0;
387	}	1594	}
		1595	#endif
388		1596
389	static void	1597	void inline_size
390	call_pending ()
391	{
392	int i;
393
394	for (i = 0; i < pendingcnt; ++i)
395	{
396	ANPENDING *p = pendings + i;
397
398	if (p->w)
399	{
400	p->w->pending = 0;
401	p->w->cb (p->w, p->events);
402	}
403	}
404
405	pendingcnt = 0;
406	}
407
408	static void
409	timers_reify ()	1598	timers_reify (EV_P)
410	{	1599	{
411	while (timercnt && timers [0]->at <= now)	1600	while (timercnt && ANHE_at (timers [HEAP0]) <= mn_now)
412	{	1601	{
413	struct ev_timer *w = timers [0];	1602	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
414		1603
415	event ((W)w, EV_TIMEOUT);	1604	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
416		1605
417	/* first reschedule or stop timer */	1606	/* first reschedule or stop timer */
418	if (w->repeat)	1607	if (w->repeat)
419	{	1608	{
420	w->at = now + w->repeat;	1609	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
421	assert (("timer timeout in the past, negative repeat?", w->at > now));	1610
		1611	ev_at (w) += w->repeat;
		1612	if (ev_at (w) < mn_now)
		1613	ev_at (w) = mn_now;
		1614
		1615	ANHE_at_set (timers [HEAP0]);
422	downheap ((WT *)timers, timercnt, 0);	1616	downheap (timers, timercnt, HEAP0);
423	}	1617	}
424	else	1618	else
425	evtimer_stop (w); /* nonrepeating: stop timer */	1619	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
426	}
427	}
428		1620
429	static void	1621	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1622	}
		1623	}
		1624
		1625	#if EV_PERIODIC_ENABLE
		1626	void inline_size
430	periodics_reify ()	1627	periodics_reify (EV_P)
431	{	1628	{
432	while (periodiccnt && periodics [0]->at <= ev_now)	1629	while (periodiccnt && ANHE_at (periodics [HEAP0]) <= ev_rt_now)
433	{	1630	{
434	struct ev_periodic *w = periodics [0];	1631	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1632
		1633	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
435		1634
436	/* first reschedule or stop timer */	1635	/* first reschedule or stop timer */
437	if (w->interval)	1636	if (w->reschedule_cb)
438	{	1637	{
439	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1638	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
440	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1639	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1640	ANHE_at_set (periodics [HEAP0]);
441	downheap ((WT *)periodics, periodiccnt, 0);	1641	downheap (periodics, periodiccnt, HEAP0);
		1642	}
		1643	else if (w->interval)
		1644	{
		1645	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1646	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1647	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1648	ANHE_at_set (periodics [HEAP0]);
		1649	downheap (periodics, periodiccnt, HEAP0);
442	}	1650	}
443	else	1651	else
444	evperiodic_stop (w); /* nonrepeating: stop timer */	1652	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
445		1653
446	event ((W)w, EV_TIMEOUT);	1654	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
447	}	1655	}
448	}	1656	}
449		1657
450	static void	1658	static void noinline
451	periodics_reschedule (ev_tstamp diff)	1659	periodics_reschedule (EV_P)
452	{	1660	{
453	int i;	1661	int i;
454		1662
455	/* adjust periodics after time jump */	1663	/* adjust periodics after time jump */
456	for (i = 0; i < periodiccnt; ++i)	1664	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
457	{	1665	{
458	struct ev_periodic *w = periodics [i];	1666	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
459		1667
		1668	if (w->reschedule_cb)
		1669	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
460	if (w->interval)	1670	else if (w->interval)
		1671	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1672
		1673	ANHE_at_set (periodics [i]);
		1674	}
		1675
		1676	/* now rebuild the heap, this for the 2-heap, inefficient for the 4-heap, but correct */
		1677	for (i = periodiccnt >> 1; --i; )
		1678	downheap (periodics, periodiccnt, i + HEAP0);
		1679	}
		1680	#endif
		1681
		1682	void inline_speed
		1683	time_update (EV_P_ ev_tstamp max_block)
		1684	{
		1685	int i;
		1686
		1687	#if EV_USE_MONOTONIC
		1688	if (expect_true (have_monotonic))
		1689	{
		1690	ev_tstamp odiff = rtmn_diff;
		1691
		1692	mn_now = get_clock ();
		1693
		1694	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1695	/* interpolate in the meantime */
		1696	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
461	{	1697	{
462	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1698	ev_rt_now = rtmn_diff + mn_now;
		1699	return;
		1700	}
463		1701
464	if (fabs (diff) >= 1e-4)	1702	now_floor = mn_now;
		1703	ev_rt_now = ev_time ();
		1704
		1705	/* loop a few times, before making important decisions.
		1706	* on the choice of "4": one iteration isn't enough,
		1707	* in case we get preempted during the calls to
		1708	* ev_time and get_clock. a second call is almost guaranteed
		1709	* to succeed in that case, though. and looping a few more times
		1710	* doesn't hurt either as we only do this on time-jumps or
		1711	* in the unlikely event of having been preempted here.
		1712	*/
		1713	for (i = 4; --i; )
		1714	{
		1715	rtmn_diff = ev_rt_now - mn_now;
		1716
		1717	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1718	return; /* all is well */
		1719
		1720	ev_rt_now = ev_time ();
		1721	mn_now = get_clock ();
		1722	now_floor = mn_now;
		1723	}
		1724
		1725	# if EV_PERIODIC_ENABLE
		1726	periodics_reschedule (EV_A);
		1727	# endif
		1728	/* no timer adjustment, as the monotonic clock doesn't jump */
		1729	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1730	}
		1731	else
		1732	#endif
		1733	{
		1734	ev_rt_now = ev_time ();
		1735
		1736	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1737	{
		1738	#if EV_PERIODIC_ENABLE
		1739	periodics_reschedule (EV_A);
		1740	#endif
		1741	/* adjust timers. this is easy, as the offset is the same for all of them */
		1742	for (i = 0; i < timercnt; ++i)
465	{	1743	{
466	evperiodic_stop (w);	1744	ANHE *he = timers + i + HEAP0;
467	evperiodic_start (w);	1745	ANHE_w (*he)->at += ev_rt_now - mn_now;
468		1746	ANHE_at_set (*he);
469	i = 0; /* restart loop, inefficient, but time jumps should be rare */
470	}	1747	}
471	}	1748	}
472	}
473	}
474		1749
475	static void	1750	mn_now = ev_rt_now;
476	time_update ()
477	{
478	int i;
479
480	ev_now = ev_time ();
481
482	if (have_monotonic)
483	{	1751	}
484	ev_tstamp odiff = diff;	1752	}
485		1753
486	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1754	void
		1755	ev_ref (EV_P)
		1756	{
		1757	++activecnt;
		1758	}
		1759
		1760	void
		1761	ev_unref (EV_P)
		1762	{
		1763	--activecnt;
		1764	}
		1765
		1766	static int loop_done;
		1767
		1768	void
		1769	ev_loop (EV_P_ int flags)
		1770	{
		1771	loop_done = EVUNLOOP_CANCEL;
		1772
		1773	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1774
		1775	do
		1776	{
		1777	#ifndef _WIN32
		1778	if (expect_false (curpid)) /* penalise the forking check even more */
		1779	if (expect_false (getpid () != curpid))
		1780	{
		1781	curpid = getpid ();
		1782	postfork = 1;
		1783	}
		1784	#endif
		1785
		1786	#if EV_FORK_ENABLE
		1787	/* we might have forked, so queue fork handlers */
		1788	if (expect_false (postfork))
		1789	if (forkcnt)
		1790	{
		1791	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1792	call_pending (EV_A);
		1793	}
		1794	#endif
		1795
		1796	/* queue prepare watchers (and execute them) */
		1797	if (expect_false (preparecnt))
487	{	1798	{
488	now = get_clock ();	1799	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
489	diff = ev_now - now;	1800	call_pending (EV_A);
490
491	if (fabs (odiff - diff) < MIN_TIMEJUMP)
492	return; /* all is well */
493
494	ev_now = ev_time ();
495	}	1801	}
496		1802
497	periodics_reschedule (diff - odiff);	1803	if (expect_false (!activecnt))
498	/* no timer adjustment, as the monotonic clock doesn't jump */	1804	break;
499	}
500	else
501	{
502	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
503	{
504	periodics_reschedule (ev_now - now);
505		1805
506	/* adjust timers. this is easy, as the offset is the same for all */	1806	/* we might have forked, so reify kernel state if necessary */
507	for (i = 0; i < timercnt; ++i)	1807	if (expect_false (postfork))
508	timers [i]->at += diff;	1808	loop_fork (EV_A);
509	}
510		1809
511	now = ev_now;
512	}
513	}
514
515	int ev_loop_done;
516
517	void ev_loop (int flags)
518	{
519	double block;
520	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
521
522	if (checkcnt)
523	{
524	queue_events ((W *)checks, checkcnt, EV_CHECK);
525	call_pending ();
526	}
527
528	do
529	{
530	/* update fd-related kernel structures */	1810	/* update fd-related kernel structures */
531	fd_reify ();	1811	fd_reify (EV_A);
532		1812
533	/* calculate blocking time */	1813	/* calculate blocking time */
		1814	{
		1815	ev_tstamp waittime = 0.;
		1816	ev_tstamp sleeptime = 0.;
534		1817
535	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1818	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
536	ev_now = ev_time ();
537
538	if (flags & EVLOOP_NONBLOCK || idlecnt)
539	block = 0.;
540	else
541	{	1819	{
		1820	/* update time to cancel out callback processing overhead */
		1821	time_update (EV_A_ 1e100);
		1822
542	block = MAX_BLOCKTIME;	1823	waittime = MAX_BLOCKTIME;
543		1824
544	if (timercnt)	1825	if (timercnt)
545	{	1826	{
546	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1827	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
547	if (block > to) block = to;	1828	if (waittime > to) waittime = to;
548	}	1829	}
549		1830
		1831	#if EV_PERIODIC_ENABLE
550	if (periodiccnt)	1832	if (periodiccnt)
551	{	1833	{
552	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1834	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
553	if (block > to) block = to;	1835	if (waittime > to) waittime = to;
554	}	1836	}
		1837	#endif
555		1838
556	if (block < 0.) block = 0.;	1839	if (expect_false (waittime < timeout_blocktime))
		1840	waittime = timeout_blocktime;
		1841
		1842	sleeptime = waittime - backend_fudge;
		1843
		1844	if (expect_true (sleeptime > io_blocktime))
		1845	sleeptime = io_blocktime;
		1846
		1847	if (sleeptime)
		1848	{
		1849	ev_sleep (sleeptime);
		1850	waittime -= sleeptime;
		1851	}
557	}	1852	}
558		1853
559	method_poll (block);	1854	++loop_count;
		1855	backend_poll (EV_A_ waittime);
560		1856
561	/* update ev_now, do magic */	1857	/* update ev_rt_now, do magic */
562	time_update ();	1858	time_update (EV_A_ waittime + sleeptime);
		1859	}
563		1860
564	/* queue pending timers and reschedule them */	1861	/* queue pending timers and reschedule them */
		1862	timers_reify (EV_A); /* relative timers called last */
		1863	#if EV_PERIODIC_ENABLE
565	periodics_reify (); /* absolute timers first */	1864	periodics_reify (EV_A); /* absolute timers called first */
566	timers_reify (); /* relative timers second */	1865	#endif
567		1866
		1867	#if EV_IDLE_ENABLE
568	/* queue idle watchers unless io or timers are pending */	1868	/* queue idle watchers unless other events are pending */
569	if (!pendingcnt)	1869	idle_reify (EV_A);
570	queue_events ((W *)idles, idlecnt, EV_IDLE);	1870	#endif
571		1871
572	/* queue check and possibly idle watchers */	1872	/* queue check watchers, to be executed first */
		1873	if (expect_false (checkcnt))
573	queue_events ((W *)checks, checkcnt, EV_CHECK);	1874	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
574		1875
575	call_pending ();	1876	call_pending (EV_A);
576	}	1877	}
577	while (!ev_loop_done);	1878	while (expect_true (
		1879	activecnt
		1880	&& !loop_done
		1881	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1882	));
578		1883
579	if (ev_loop_done != 2)	1884	if (loop_done == EVUNLOOP_ONE)
		1885	loop_done = EVUNLOOP_CANCEL;
		1886	}
		1887
		1888	void
		1889	ev_unloop (EV_P_ int how)
		1890	{
580	ev_loop_done = 0;	1891	loop_done = how;
581	}	1892	}
582		1893
583	/*****************************************************************************/	1894	/*****************************************************************************/
584		1895
585	static void	1896	void inline_size
586	wlist_add (WL *head, WL elem)	1897	wlist_add (WL *head, WL elem)
587	{	1898	{
588	elem->next = *head;	1899	elem->next = *head;
589	*head = elem;	1900	*head = elem;
590	}	1901	}
591		1902
592	static void	1903	void inline_size
593	wlist_del (WL *head, WL elem)	1904	wlist_del (WL *head, WL elem)
594	{	1905	{
595	while (*head)	1906	while (*head)
596	{	1907	{
597	if (*head == elem)	1908	if (*head == elem)
…		…
602		1913
603	head = &(*head)->next;	1914	head = &(*head)->next;
604	}	1915	}
605	}	1916	}
606		1917
607	static void	1918	void inline_speed
608	ev_clear (W w)	1919	clear_pending (EV_P_ W w)
609	{	1920	{
610	if (w->pending)	1921	if (w->pending)
611	{	1922	{
612	pendings [w->pending - 1].w = 0;	1923	pendings [ABSPRI (w)][w->pending - 1].w = 0;
613	w->pending = 0;	1924	w->pending = 0;
614	}	1925	}
615	}	1926	}
616		1927
617	static void	1928	int
		1929	ev_clear_pending (EV_P_ void *w)
		1930	{
		1931	W w_ = (W)w;
		1932	int pending = w_->pending;
		1933
		1934	if (expect_true (pending))
		1935	{
		1936	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1937	w_->pending = 0;
		1938	p->w = 0;
		1939	return p->events;
		1940	}
		1941	else
		1942	return 0;
		1943	}
		1944
		1945	void inline_size
		1946	pri_adjust (EV_P_ W w)
		1947	{
		1948	int pri = w->priority;
		1949	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1950	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1951	w->priority = pri;
		1952	}
		1953
		1954	void inline_speed
618	ev_start (W w, int active)	1955	ev_start (EV_P_ W w, int active)
619	{	1956	{
		1957	pri_adjust (EV_A_ w);
620	w->active = active;	1958	w->active = active;
		1959	ev_ref (EV_A);
621	}	1960	}
622		1961
623	static void	1962	void inline_size
624	ev_stop (W w)	1963	ev_stop (EV_P_ W w)
625	{	1964	{
		1965	ev_unref (EV_A);
626	w->active = 0;	1966	w->active = 0;
627	}	1967	}
628		1968
629	/*****************************************************************************/	1969	/*****************************************************************************/
630		1970
631	void	1971	void noinline
632	evio_start (struct ev_io *w)	1972	ev_io_start (EV_P_ ev_io *w)
633	{	1973	{
		1974	int fd = w->fd;
		1975
634	if (ev_is_active (w))	1976	if (expect_false (ev_is_active (w)))
635	return;	1977	return;
636		1978
637	int fd = w->fd;	1979	assert (("ev_io_start called with negative fd", fd >= 0));
638		1980
639	ev_start ((W)w, 1);	1981	ev_start (EV_A_ (W)w, 1);
640	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1982	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
641	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1983	wlist_add (&anfds[fd].head, (WL)w);
642		1984
643	++fdchangecnt;	1985	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
644	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1986	w->events &= ~EV_IOFDSET;
645	fdchanges [fdchangecnt - 1] = fd;
646	}	1987	}
647		1988
648	void	1989	void noinline
649	evio_stop (struct ev_io *w)	1990	ev_io_stop (EV_P_ ev_io *w)
650	{	1991	{
651	ev_clear ((W)w);	1992	clear_pending (EV_A_ (W)w);
652	if (!ev_is_active (w))	1993	if (expect_false (!ev_is_active (w)))
653	return;	1994	return;
654		1995
		1996	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1997
655	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1998	wlist_del (&anfds[w->fd].head, (WL)w);
656	ev_stop ((W)w);	1999	ev_stop (EV_A_ (W)w);
657		2000
658	++fdchangecnt;	2001	fd_change (EV_A_ w->fd, 1);
659	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
660	fdchanges [fdchangecnt - 1] = w->fd;
661	}	2002	}
662		2003
663	void	2004	void noinline
664	evtimer_start (struct ev_timer *w)	2005	ev_timer_start (EV_P_ ev_timer *w)
665	{	2006	{
666	if (ev_is_active (w))	2007	if (expect_false (ev_is_active (w)))
667	return;	2008	return;
668		2009
669	w->at += now;	2010	ev_at (w) += mn_now;
670		2011
671	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	2012	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
672		2013
673	ev_start ((W)w, ++timercnt);	2014	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
674	array_needsize (timers, timermax, timercnt, );	2015	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
675	timers [timercnt - 1] = w;	2016	ANHE_w (timers [ev_active (w)]) = (WT)w;
676	upheap ((WT *)timers, timercnt - 1);	2017	ANHE_at_set (timers [ev_active (w)]);
677	}	2018	upheap (timers, ev_active (w));
678		2019
679	void	2020	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
		2021	}
		2022
		2023	void noinline
680	evtimer_stop (struct ev_timer *w)	2024	ev_timer_stop (EV_P_ ev_timer *w)
681	{	2025	{
682	ev_clear ((W)w);	2026	clear_pending (EV_A_ (W)w);
683	if (!ev_is_active (w))	2027	if (expect_false (!ev_is_active (w)))
684	return;	2028	return;
685		2029
686	if (w->active < timercnt--)	2030	{
		2031	int active = ev_active (w);
		2032
		2033	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2034
		2035	if (expect_true (active < timercnt + HEAP0 - 1))
687	{	2036	{
688	timers [w->active - 1] = timers [timercnt];	2037	timers [active] = timers [timercnt + HEAP0 - 1];
689	downheap ((WT *)timers, timercnt, w->active - 1);	2038	adjustheap (timers, timercnt, active);
690	}	2039	}
691		2040
692	w->at = w->repeat;	2041	--timercnt;
		2042	}
693		2043
		2044	ev_at (w) -= mn_now;
		2045
694	ev_stop ((W)w);	2046	ev_stop (EV_A_ (W)w);
695	}	2047	}
696		2048
697	void	2049	void noinline
698	evtimer_again (struct ev_timer *w)	2050	ev_timer_again (EV_P_ ev_timer *w)
699	{	2051	{
700	if (ev_is_active (w))	2052	if (ev_is_active (w))
701	{	2053	{
702	if (w->repeat)	2054	if (w->repeat)
703	{	2055	{
704	w->at = now + w->repeat;	2056	ev_at (w) = mn_now + w->repeat;
		2057	ANHE_at_set (timers [ev_active (w)]);
705	downheap ((WT *)timers, timercnt, w->active - 1);	2058	adjustheap (timers, timercnt, ev_active (w));
706	}	2059	}
707	else	2060	else
708	evtimer_stop (w);	2061	ev_timer_stop (EV_A_ w);
709	}	2062	}
710	else if (w->repeat)	2063	else if (w->repeat)
		2064	{
		2065	ev_at (w) = w->repeat;
711	evtimer_start (w);	2066	ev_timer_start (EV_A_ w);
		2067	}
712	}	2068	}
713		2069
714	void	2070	#if EV_PERIODIC_ENABLE
		2071	void noinline
715	evperiodic_start (struct ev_periodic *w)	2072	ev_periodic_start (EV_P_ ev_periodic *w)
716	{	2073	{
717	if (ev_is_active (w))	2074	if (expect_false (ev_is_active (w)))
718	return;	2075	return;
719		2076
720	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	2077	if (w->reschedule_cb)
721		2078	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2079	else if (w->interval)
		2080	{
		2081	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
722	/* this formula differs from the one in periodic_reify because we do not always round up */	2082	/* this formula differs from the one in periodic_reify because we do not always round up */
723	if (w->interval)
724	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	2083	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2084	}
		2085	else
		2086	ev_at (w) = w->offset;
725		2087
726	ev_start ((W)w, ++periodiccnt);	2088	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
727	array_needsize (periodics, periodicmax, periodiccnt, );	2089	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
728	periodics [periodiccnt - 1] = w;	2090	ANHE_w (periodics [ev_active (w)]) = (WT)w;
729	upheap ((WT *)periodics, periodiccnt - 1);	2091	upheap (periodics, ev_active (w));
730	}
731		2092
732	void	2093	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
		2094	}
		2095
		2096	void noinline
733	evperiodic_stop (struct ev_periodic *w)	2097	ev_periodic_stop (EV_P_ ev_periodic *w)
734	{	2098	{
735	ev_clear ((W)w);	2099	clear_pending (EV_A_ (W)w);
736	if (!ev_is_active (w))	2100	if (expect_false (!ev_is_active (w)))
737	return;	2101	return;
738		2102
739	if (w->active < periodiccnt--)	2103	{
		2104	int active = ev_active (w);
		2105
		2106	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2107
		2108	if (expect_true (active < periodiccnt + HEAP0 - 1))
740	{	2109	{
741	periodics [w->active - 1] = periodics [periodiccnt];	2110	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
742	downheap ((WT *)periodics, periodiccnt, w->active - 1);	2111	adjustheap (periodics, periodiccnt, active);
743	}	2112	}
744		2113
		2114	--periodiccnt;
		2115	}
		2116
745	ev_stop ((W)w);	2117	ev_stop (EV_A_ (W)w);
746	}	2118	}
747		2119
748	void	2120	void noinline
		2121	ev_periodic_again (EV_P_ ev_periodic *w)
		2122	{
		2123	/* TODO: use adjustheap and recalculation */
		2124	ev_periodic_stop (EV_A_ w);
		2125	ev_periodic_start (EV_A_ w);
		2126	}
		2127	#endif
		2128
		2129	#ifndef SA_RESTART
		2130	# define SA_RESTART 0
		2131	#endif
		2132
		2133	void noinline
749	evsignal_start (struct ev_signal *w)	2134	ev_signal_start (EV_P_ ev_signal *w)
750	{	2135	{
		2136	#if EV_MULTIPLICITY
		2137	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2138	#endif
751	if (ev_is_active (w))	2139	if (expect_false (ev_is_active (w)))
752	return;	2140	return;
753		2141
754	ev_start ((W)w, 1);	2142	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2143
		2144	evpipe_init (EV_A);
		2145
		2146	{
		2147	#ifndef _WIN32
		2148	sigset_t full, prev;
		2149	sigfillset (&full);
		2150	sigprocmask (SIG_SETMASK, &full, &prev);
		2151	#endif
		2152
755	array_needsize (signals, signalmax, w->signum, signals_init);	2153	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2154
		2155	#ifndef _WIN32
		2156	sigprocmask (SIG_SETMASK, &prev, 0);
		2157	#endif
		2158	}
		2159
		2160	ev_start (EV_A_ (W)w, 1);
756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2161	wlist_add (&signals [w->signum - 1].head, (WL)w);
757		2162
758	if (!w->next)	2163	if (!((WL)w)->next)
759	{	2164	{
		2165	#if _WIN32
		2166	signal (w->signum, ev_sighandler);
		2167	#else
760	struct sigaction sa;	2168	struct sigaction sa;
761	sa.sa_handler = sighandler;	2169	sa.sa_handler = ev_sighandler;
762	sigfillset (&sa.sa_mask);	2170	sigfillset (&sa.sa_mask);
763	sa.sa_flags = 0;	2171	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
764	sigaction (w->signum, &sa, 0);	2172	sigaction (w->signum, &sa, 0);
		2173	#endif
765	}	2174	}
766	}	2175	}
767		2176
768	void	2177	void noinline
769	evsignal_stop (struct ev_signal *w)	2178	ev_signal_stop (EV_P_ ev_signal *w)
770	{	2179	{
771	ev_clear ((W)w);	2180	clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	2181	if (expect_false (!ev_is_active (w)))
773	return;	2182	return;
774		2183
775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2184	wlist_del (&signals [w->signum - 1].head, (WL)w);
776	ev_stop ((W)w);	2185	ev_stop (EV_A_ (W)w);
777		2186
778	if (!signals [w->signum - 1].head)	2187	if (!signals [w->signum - 1].head)
779	signal (w->signum, SIG_DFL);	2188	signal (w->signum, SIG_DFL);
780	}	2189	}
781		2190
782	void evidle_start (struct ev_idle *w)	2191	void
		2192	ev_child_start (EV_P_ ev_child *w)
783	{	2193	{
		2194	#if EV_MULTIPLICITY
		2195	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2196	#endif
784	if (ev_is_active (w))	2197	if (expect_false (ev_is_active (w)))
785	return;	2198	return;
786		2199
787	ev_start ((W)w, ++idlecnt);	2200	ev_start (EV_A_ (W)w, 1);
788	array_needsize (idles, idlemax, idlecnt, );	2201	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
789	idles [idlecnt - 1] = w;
790	}	2202	}
791		2203
792	void evidle_stop (struct ev_idle *w)	2204	void
		2205	ev_child_stop (EV_P_ ev_child *w)
793	{	2206	{
794	ev_clear ((W)w);	2207	clear_pending (EV_A_ (W)w);
795	if (ev_is_active (w))	2208	if (expect_false (!ev_is_active (w)))
796	return;	2209	return;
797		2210
798	idles [w->active - 1] = idles [--idlecnt];	2211	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
799	ev_stop ((W)w);	2212	ev_stop (EV_A_ (W)w);
800	}	2213	}
801		2214
802	void evcheck_start (struct ev_check *w)	2215	#if EV_STAT_ENABLE
		2216
		2217	# ifdef _WIN32
		2218	# undef lstat
		2219	# define lstat(a,b) _stati64 (a,b)
		2220	# endif
		2221
		2222	#define DEF_STAT_INTERVAL 5.0074891
		2223	#define MIN_STAT_INTERVAL 0.1074891
		2224
		2225	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2226
		2227	#if EV_USE_INOTIFY
		2228	# define EV_INOTIFY_BUFSIZE 8192
		2229
		2230	static void noinline
		2231	infy_add (EV_P_ ev_stat *w)
803	{	2232	{
804	if (ev_is_active (w))	2233	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);
		2234
		2235	if (w->wd < 0)
		2236	{
		2237	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2238
		2239	/* monitor some parent directory for speedup hints */
		2240	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2241	/* but an efficiency issue only */
		2242	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2243	{
		2244	char path [4096];
		2245	strcpy (path, w->path);
		2246
		2247	do
		2248	{
		2249	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2250	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2251
		2252	char *pend = strrchr (path, '/');
		2253
		2254	if (!pend)
		2255	break; /* whoops, no '/', complain to your admin */
		2256
		2257	*pend = 0;
		2258	w->wd = inotify_add_watch (fs_fd, path, mask);
		2259	}
		2260	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2261	}
		2262	}
		2263	else
		2264	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2265
		2266	if (w->wd >= 0)
		2267	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2268	}
		2269
		2270	static void noinline
		2271	infy_del (EV_P_ ev_stat *w)
		2272	{
		2273	int slot;
		2274	int wd = w->wd;
		2275
		2276	if (wd < 0)
805	return;	2277	return;
806		2278
		2279	w->wd = -2;
		2280	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2281	wlist_del (&fs_hash [slot].head, (WL)w);
		2282
		2283	/* remove this watcher, if others are watching it, they will rearm */
		2284	inotify_rm_watch (fs_fd, wd);
		2285	}
		2286
		2287	static void noinline
		2288	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2289	{
		2290	if (slot < 0)
		2291	/* overflow, need to check for all hahs slots */
		2292	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2293	infy_wd (EV_A_ slot, wd, ev);
		2294	else
		2295	{
		2296	WL w_;
		2297
		2298	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2299	{
		2300	ev_stat *w = (ev_stat *)w_;
		2301	w_ = w_->next; /* lets us remove this watcher and all before it */
		2302
		2303	if (w->wd == wd || wd == -1)
		2304	{
		2305	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2306	{
		2307	w->wd = -1;
		2308	infy_add (EV_A_ w); /* re-add, no matter what */
		2309	}
		2310
		2311	stat_timer_cb (EV_A_ &w->timer, 0);
		2312	}
		2313	}
		2314	}
		2315	}
		2316
		2317	static void
		2318	infy_cb (EV_P_ ev_io *w, int revents)
		2319	{
		2320	char buf [EV_INOTIFY_BUFSIZE];
		2321	struct inotify_event *ev = (struct inotify_event *)buf;
		2322	int ofs;
		2323	int len = read (fs_fd, buf, sizeof (buf));
		2324
		2325	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2326	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2327	}
		2328
		2329	void inline_size
		2330	infy_init (EV_P)
		2331	{
		2332	if (fs_fd != -2)
		2333	return;
		2334
		2335	fs_fd = inotify_init ();
		2336
		2337	if (fs_fd >= 0)
		2338	{
		2339	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2340	ev_set_priority (&fs_w, EV_MAXPRI);
		2341	ev_io_start (EV_A_ &fs_w);
		2342	}
		2343	}
		2344
		2345	void inline_size
		2346	infy_fork (EV_P)
		2347	{
		2348	int slot;
		2349
		2350	if (fs_fd < 0)
		2351	return;
		2352
		2353	close (fs_fd);
		2354	fs_fd = inotify_init ();
		2355
		2356	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2357	{
		2358	WL w_ = fs_hash [slot].head;
		2359	fs_hash [slot].head = 0;
		2360
		2361	while (w_)
		2362	{
		2363	ev_stat *w = (ev_stat *)w_;
		2364	w_ = w_->next; /* lets us add this watcher */
		2365
		2366	w->wd = -1;
		2367
		2368	if (fs_fd >= 0)
		2369	infy_add (EV_A_ w); /* re-add, no matter what */
		2370	else
		2371	ev_timer_start (EV_A_ &w->timer);
		2372	}
		2373
		2374	}
		2375	}
		2376
		2377	#endif
		2378
		2379	void
		2380	ev_stat_stat (EV_P_ ev_stat *w)
		2381	{
		2382	if (lstat (w->path, &w->attr) < 0)
		2383	w->attr.st_nlink = 0;
		2384	else if (!w->attr.st_nlink)
		2385	w->attr.st_nlink = 1;
		2386	}
		2387
		2388	static void noinline
		2389	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2390	{
		2391	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2392
		2393	/* we copy this here each the time so that */
		2394	/* prev has the old value when the callback gets invoked */
		2395	w->prev = w->attr;
		2396	ev_stat_stat (EV_A_ w);
		2397
		2398	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2399	if (
		2400	w->prev.st_dev != w->attr.st_dev
		2401	|| w->prev.st_ino != w->attr.st_ino
		2402	|| w->prev.st_mode != w->attr.st_mode
		2403	|| w->prev.st_nlink != w->attr.st_nlink
		2404	|| w->prev.st_uid != w->attr.st_uid
		2405	|| w->prev.st_gid != w->attr.st_gid
		2406	|| w->prev.st_rdev != w->attr.st_rdev
		2407	|| w->prev.st_size != w->attr.st_size
		2408	|| w->prev.st_atime != w->attr.st_atime
		2409	|| w->prev.st_mtime != w->attr.st_mtime
		2410	|| w->prev.st_ctime != w->attr.st_ctime
		2411	) {
		2412	#if EV_USE_INOTIFY
		2413	infy_del (EV_A_ w);
		2414	infy_add (EV_A_ w);
		2415	ev_stat_stat (EV_A_ w); /* avoid race... */
		2416	#endif
		2417
		2418	ev_feed_event (EV_A_ w, EV_STAT);
		2419	}
		2420	}
		2421
		2422	void
		2423	ev_stat_start (EV_P_ ev_stat *w)
		2424	{
		2425	if (expect_false (ev_is_active (w)))
		2426	return;
		2427
		2428	/* since we use memcmp, we need to clear any padding data etc. */
		2429	memset (&w->prev, 0, sizeof (ev_statdata));
		2430	memset (&w->attr, 0, sizeof (ev_statdata));
		2431
		2432	ev_stat_stat (EV_A_ w);
		2433
		2434	if (w->interval < MIN_STAT_INTERVAL)
		2435	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2436
		2437	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2438	ev_set_priority (&w->timer, ev_priority (w));
		2439
		2440	#if EV_USE_INOTIFY
		2441	infy_init (EV_A);
		2442
		2443	if (fs_fd >= 0)
		2444	infy_add (EV_A_ w);
		2445	else
		2446	#endif
		2447	ev_timer_start (EV_A_ &w->timer);
		2448
		2449	ev_start (EV_A_ (W)w, 1);
		2450	}
		2451
		2452	void
		2453	ev_stat_stop (EV_P_ ev_stat *w)
		2454	{
		2455	clear_pending (EV_A_ (W)w);
		2456	if (expect_false (!ev_is_active (w)))
		2457	return;
		2458
		2459	#if EV_USE_INOTIFY
		2460	infy_del (EV_A_ w);
		2461	#endif
		2462	ev_timer_stop (EV_A_ &w->timer);
		2463
		2464	ev_stop (EV_A_ (W)w);
		2465	}
		2466	#endif
		2467
		2468	#if EV_IDLE_ENABLE
		2469	void
		2470	ev_idle_start (EV_P_ ev_idle *w)
		2471	{
		2472	if (expect_false (ev_is_active (w)))
		2473	return;
		2474
		2475	pri_adjust (EV_A_ (W)w);
		2476
		2477	{
		2478	int active = ++idlecnt [ABSPRI (w)];
		2479
		2480	++idleall;
		2481	ev_start (EV_A_ (W)w, active);
		2482
		2483	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2484	idles [ABSPRI (w)][active - 1] = w;
		2485	}
		2486	}
		2487
		2488	void
		2489	ev_idle_stop (EV_P_ ev_idle *w)
		2490	{
		2491	clear_pending (EV_A_ (W)w);
		2492	if (expect_false (!ev_is_active (w)))
		2493	return;
		2494
		2495	{
		2496	int active = ev_active (w);
		2497
		2498	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2499	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2500
		2501	ev_stop (EV_A_ (W)w);
		2502	--idleall;
		2503	}
		2504	}
		2505	#endif
		2506
		2507	void
		2508	ev_prepare_start (EV_P_ ev_prepare *w)
		2509	{
		2510	if (expect_false (ev_is_active (w)))
		2511	return;
		2512
		2513	ev_start (EV_A_ (W)w, ++preparecnt);
		2514	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2515	prepares [preparecnt - 1] = w;
		2516	}
		2517
		2518	void
		2519	ev_prepare_stop (EV_P_ ev_prepare *w)
		2520	{
		2521	clear_pending (EV_A_ (W)w);
		2522	if (expect_false (!ev_is_active (w)))
		2523	return;
		2524
		2525	{
		2526	int active = ev_active (w);
		2527
		2528	prepares [active - 1] = prepares [--preparecnt];
		2529	ev_active (prepares [active - 1]) = active;
		2530	}
		2531
		2532	ev_stop (EV_A_ (W)w);
		2533	}
		2534
		2535	void
		2536	ev_check_start (EV_P_ ev_check *w)
		2537	{
		2538	if (expect_false (ev_is_active (w)))
		2539	return;
		2540
807	ev_start ((W)w, ++checkcnt);	2541	ev_start (EV_A_ (W)w, ++checkcnt);
808	array_needsize (checks, checkmax, checkcnt, );	2542	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
809	checks [checkcnt - 1] = w;	2543	checks [checkcnt - 1] = w;
810	}	2544	}
811		2545
		2546	void
812	void evcheck_stop (struct ev_check *w)	2547	ev_check_stop (EV_P_ ev_check *w)
813	{	2548	{
814	ev_clear ((W)w);	2549	clear_pending (EV_A_ (W)w);
815	if (ev_is_active (w))	2550	if (expect_false (!ev_is_active (w)))
816	return;	2551	return;
817		2552
		2553	{
		2554	int active = ev_active (w);
		2555
818	checks [w->active - 1] = checks [--checkcnt];	2556	checks [active - 1] = checks [--checkcnt];
		2557	ev_active (checks [active - 1]) = active;
		2558	}
		2559
819	ev_stop ((W)w);	2560	ev_stop (EV_A_ (W)w);
820	}	2561	}
		2562
		2563	#if EV_EMBED_ENABLE
		2564	void noinline
		2565	ev_embed_sweep (EV_P_ ev_embed *w)
		2566	{
		2567	ev_loop (w->other, EVLOOP_NONBLOCK);
		2568	}
		2569
		2570	static void
		2571	embed_io_cb (EV_P_ ev_io *io, int revents)
		2572	{
		2573	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2574
		2575	if (ev_cb (w))
		2576	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2577	else
		2578	ev_loop (w->other, EVLOOP_NONBLOCK);
		2579	}
		2580
		2581	static void
		2582	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2583	{
		2584	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2585
		2586	{
		2587	struct ev_loop *loop = w->other;
		2588
		2589	while (fdchangecnt)
		2590	{
		2591	fd_reify (EV_A);
		2592	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2593	}
		2594	}
		2595	}
		2596
		2597	#if 0
		2598	static void
		2599	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2600	{
		2601	ev_idle_stop (EV_A_ idle);
		2602	}
		2603	#endif
		2604
		2605	void
		2606	ev_embed_start (EV_P_ ev_embed *w)
		2607	{
		2608	if (expect_false (ev_is_active (w)))
		2609	return;
		2610
		2611	{
		2612	struct ev_loop *loop = w->other;
		2613	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2614	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2615	}
		2616
		2617	ev_set_priority (&w->io, ev_priority (w));
		2618	ev_io_start (EV_A_ &w->io);
		2619
		2620	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2621	ev_set_priority (&w->prepare, EV_MINPRI);
		2622	ev_prepare_start (EV_A_ &w->prepare);
		2623
		2624	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2625
		2626	ev_start (EV_A_ (W)w, 1);
		2627	}
		2628
		2629	void
		2630	ev_embed_stop (EV_P_ ev_embed *w)
		2631	{
		2632	clear_pending (EV_A_ (W)w);
		2633	if (expect_false (!ev_is_active (w)))
		2634	return;
		2635
		2636	ev_io_stop (EV_A_ &w->io);
		2637	ev_prepare_stop (EV_A_ &w->prepare);
		2638
		2639	ev_stop (EV_A_ (W)w);
		2640	}
		2641	#endif
		2642
		2643	#if EV_FORK_ENABLE
		2644	void
		2645	ev_fork_start (EV_P_ ev_fork *w)
		2646	{
		2647	if (expect_false (ev_is_active (w)))
		2648	return;
		2649
		2650	ev_start (EV_A_ (W)w, ++forkcnt);
		2651	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2652	forks [forkcnt - 1] = w;
		2653	}
		2654
		2655	void
		2656	ev_fork_stop (EV_P_ ev_fork *w)
		2657	{
		2658	clear_pending (EV_A_ (W)w);
		2659	if (expect_false (!ev_is_active (w)))
		2660	return;
		2661
		2662	{
		2663	int active = ev_active (w);
		2664
		2665	forks [active - 1] = forks [--forkcnt];
		2666	ev_active (forks [active - 1]) = active;
		2667	}
		2668
		2669	ev_stop (EV_A_ (W)w);
		2670	}
		2671	#endif
		2672
		2673	#if EV_ASYNC_ENABLE
		2674	void
		2675	ev_async_start (EV_P_ ev_async *w)
		2676	{
		2677	if (expect_false (ev_is_active (w)))
		2678	return;
		2679
		2680	evpipe_init (EV_A);
		2681
		2682	ev_start (EV_A_ (W)w, ++asynccnt);
		2683	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2684	asyncs [asynccnt - 1] = w;
		2685	}
		2686
		2687	void
		2688	ev_async_stop (EV_P_ ev_async *w)
		2689	{
		2690	clear_pending (EV_A_ (W)w);
		2691	if (expect_false (!ev_is_active (w)))
		2692	return;
		2693
		2694	{
		2695	int active = ev_active (w);
		2696
		2697	asyncs [active - 1] = asyncs [--asynccnt];
		2698	ev_active (asyncs [active - 1]) = active;
		2699	}
		2700
		2701	ev_stop (EV_A_ (W)w);
		2702	}
		2703
		2704	void
		2705	ev_async_send (EV_P_ ev_async *w)
		2706	{
		2707	w->sent = 1;
		2708	evpipe_write (EV_A_ &gotasync);
		2709	}
		2710	#endif
821		2711
822	/*****************************************************************************/	2712	/*****************************************************************************/
823		2713
824	struct ev_once	2714	struct ev_once
825	{	2715	{
826	struct ev_io io;	2716	ev_io io;
827	struct ev_timer to;	2717	ev_timer to;
828	void (*cb)(int revents, void *arg);	2718	void (*cb)(int revents, void *arg);
829	void *arg;	2719	void *arg;
830	};	2720	};
831		2721
832	static void	2722	static void
833	once_cb (struct ev_once *once, int revents)	2723	once_cb (EV_P_ struct ev_once *once, int revents)
834	{	2724	{
835	void (*cb)(int revents, void *arg) = once->cb;	2725	void (*cb)(int revents, void *arg) = once->cb;
836	void *arg = once->arg;	2726	void *arg = once->arg;
837		2727
838	evio_stop (&once->io);	2728	ev_io_stop (EV_A_ &once->io);
839	evtimer_stop (&once->to);	2729	ev_timer_stop (EV_A_ &once->to);
840	free (once);	2730	ev_free (once);
841		2731
842	cb (revents, arg);	2732	cb (revents, arg);
843	}	2733	}
844		2734
845	static void	2735	static void
846	once_cb_io (struct ev_io *w, int revents)	2736	once_cb_io (EV_P_ ev_io *w, int revents)
847	{	2737	{
848	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2738	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
849	}	2739	}
850		2740
851	static void	2741	static void
852	once_cb_to (struct ev_timer *w, int revents)	2742	once_cb_to (EV_P_ ev_timer *w, int revents)
853	{	2743	{
854	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2744	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
855	}	2745	}
856		2746
857	void	2747	void
858	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2748	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
859	{	2749	{
860	struct ev_once *once = malloc (sizeof (struct ev_once));	2750	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
861		2751
862	if (!once)	2752	if (expect_false (!once))
863	cb (EV_ERROR, arg);	2753	{
864	else	2754	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		2755	return;
865	{	2756	}
		2757
866	once->cb = cb;	2758	once->cb = cb;
867	once->arg = arg;	2759	once->arg = arg;
868		2760
869	evw_init (&once->io, once_cb_io);	2761	ev_init (&once->io, once_cb_io);
870
871	if (fd >= 0)	2762	if (fd >= 0)
872	{	2763	{
873	evio_set (&once->io, fd, events);	2764	ev_io_set (&once->io, fd, events);
874	evio_start (&once->io);	2765	ev_io_start (EV_A_ &once->io);
875	}	2766	}
876		2767
877	evw_init (&once->to, once_cb_to);	2768	ev_init (&once->to, once_cb_to);
878
879	if (timeout >= 0.)	2769	if (timeout >= 0.)
880	{	2770	{
881	evtimer_set (&once->to, timeout, 0.);	2771	ev_timer_set (&once->to, timeout, 0.);
882	evtimer_start (&once->to);	2772	ev_timer_start (EV_A_ &once->to);
883	}
884	}
885	}
886
887	/*****************************************************************************/
888
889	#if 0
890
891	struct ev_io wio;
892
893	static void
894	sin_cb (struct ev_io *w, int revents)
895	{
896	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
897	}
898
899	static void
900	ocb (struct ev_timer *w, int revents)
901	{
902	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
903	evtimer_stop (w);
904	evtimer_start (w);
905	}
906
907	static void
908	scb (struct ev_signal *w, int revents)
909	{
910	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
911	evio_stop (&wio);
912	evio_start (&wio);
913	}
914
915	static void
916	gcb (struct ev_signal *w, int revents)
917	{
918	fprintf (stderr, "generic %x\n", revents);
919
920	}
921
922	int main (void)
923	{
924	ev_init (0);
925
926	evio_init (&wio, sin_cb, 0, EV_READ);
927	evio_start (&wio);
928
929	struct ev_timer t[10000];
930
931	#if 0
932	int i;
933	for (i = 0; i < 10000; ++i)
934	{	2773	}
935	struct ev_timer *w = t + i;
936	evw_init (w, ocb, i);
937	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
938	evtimer_start (w);
939	if (drand48 () < 0.5)
940	evtimer_stop (w);
941	}
942	#endif
943
944	struct ev_timer t1;
945	evtimer_init (&t1, ocb, 5, 10);
946	evtimer_start (&t1);
947
948	struct ev_signal sig;
949	evsignal_init (&sig, scb, SIGQUIT);
950	evsignal_start (&sig);
951
952	struct ev_check cw;
953	evcheck_init (&cw, gcb);
954	evcheck_start (&cw);
955
956	struct ev_idle iw;
957	evidle_init (&iw, gcb);
958	evidle_start (&iw);
959
960	ev_loop (0);
961
962	return 0;
963	}	2774	}
964		2775
		2776	#if EV_MULTIPLICITY
		2777	#include "ev_wrap.h"
965	#endif	2778	#endif
966		2779
		2780	#ifdef __cplusplus
		2781	}
		2782	#endif
967		2783
968
969

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