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Comparing libev/ev.c (file contents):
Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs.
Revision 1.249 by root, Wed May 21 23:30:52 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>
		136	#include <fcntl.h>
		137	#include <stddef.h>
3		138
4	#include <stdio.h>	139	#include <stdio.h>
5		140
		141	#include <assert.h>
6	#include <errno.h>	142	#include <errno.h>
7	#include <sys/time.h>	143	#include <sys/types.h>
8	#include <time.h>	144	#include <time.h>
9		145
		146	#include <signal.h>
		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
		154	#ifndef _WIN32
		155	# include <sys/time.h>
		156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
		163	# endif
		164	#endif
		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
		167
		168	#ifndef EV_USE_MONOTONIC
		169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
		178	#endif
		179
		180	#ifndef EV_USE_SELECT
		181	# define EV_USE_SELECT 1
		182	#endif
		183
		184	#ifndef EV_USE_POLL
		185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
		190	#endif
		191
		192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
		196	# define EV_USE_EPOLL 0
		197	# endif
		198	#endif
		199
		200	#ifndef EV_USE_KQUEUE
		201	# define EV_USE_KQUEUE 0
		202	#endif
		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
		208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
		213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	#if 0 /* debugging */
		241	# define EV_VERIFY 1
		242	# define EV_USE_4HEAP 1
		243	# define EV_HEAP_CACHE_AT 1
		244	#endif
		245
		246	#ifndef EV_USE_4HEAP
		247	# define EV_USE_4HEAP !EV_MINIMAL
		248	#endif
		249
		250	#ifndef EV_HEAP_CACHE_AT
		251	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		252	#endif
		253
		254	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		255
10	#ifdef CLOCK_MONOTONIC	256	#ifndef CLOCK_MONOTONIC
		257	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	258	# define EV_USE_MONOTONIC 0
		259	#endif
		260
		261	#ifndef CLOCK_REALTIME
		262	# undef EV_USE_REALTIME
		263	# define EV_USE_REALTIME 0
		264	#endif
		265
		266	#if !EV_STAT_ENABLE
		267	# undef EV_USE_INOTIFY
		268	# define EV_USE_INOTIFY 0
		269	#endif
		270
		271	#if !EV_USE_NANOSLEEP
		272	# ifndef _WIN32
		273	# include <sys/select.h>
12	#endif	274	# endif
		275	#endif
13		276
14	#define HAVE_EPOLL 1	277	#if EV_USE_INOTIFY
15	#define HAVE_REALTIME 1	278	# include <sys/inotify.h>
16	#define HAVE_SELECT 0	279	#endif
17		280
18	#define MAX_BLOCKTIME 60.	281	#if EV_SELECT_IS_WINSOCKET
		282	# include <winsock.h>
		283	#endif
19		284
		285	#if EV_USE_EVENTFD
		286	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		287	# include <stdint.h>
		288	# ifdef __cplusplus
		289	extern "C" {
		290	# endif
		291	int eventfd (unsigned int initval, int flags);
		292	# ifdef __cplusplus
		293	}
		294	# endif
		295	#endif
		296
		297	/**/
		298
		299	/* EV_VERIFY: enable internal consistency checks
		300	* undefined or zero: no verification done or available
		301	* 1 or higher: ev_loop_verify function available
		302	* 2 or higher: ev_loop_verify is called frequently
		303	*/
		304	#if EV_VERIFY >= 1
		305	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
		306	#else
		307	# define EV_FREQUENT_CHECK do { } while (0)
		308	#endif
		309
		310	/*
		311	* This is used to avoid floating point rounding problems.
		312	* It is added to ev_rt_now when scheduling periodics
		313	* to ensure progress, time-wise, even when rounding
		314	* errors are against us.
		315	* This value is good at least till the year 4000.
		316	* Better solutions welcome.
		317	*/
		318	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		319
		320	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		321	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		322	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
		323
		324	#if __GNUC__ >= 4
		325	# define expect(expr,value) __builtin_expect ((expr),(value))
		326	# define noinline __attribute__ ((noinline))
		327	#else
		328	# define expect(expr,value) (expr)
		329	# define noinline
		330	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		331	# define inline
		332	# endif
		333	#endif
		334
		335	#define expect_false(expr) expect ((expr) != 0, 0)
		336	#define expect_true(expr) expect ((expr) != 0, 1)
		337	#define inline_size static inline
		338
		339	#if EV_MINIMAL
		340	# define inline_speed static noinline
		341	#else
		342	# define inline_speed static inline
		343	#endif
		344
		345	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		346	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		347
		348	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		349	#define EMPTY2(a,b) /* used to suppress some warnings */
		350
		351	typedef ev_watcher *W;
		352	typedef ev_watcher_list *WL;
		353	typedef ev_watcher_time *WT;
		354
		355	#define ev_active(w) ((W)(w))->active
		356	#define ev_at(w) ((WT)(w))->at
		357
		358	#if EV_USE_MONOTONIC
		359	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		360	/* giving it a reasonably high chance of working on typical architetcures */
		361	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		362	#endif
		363
		364	#ifdef _WIN32
		365	# include "ev_win32.c"
		366	#endif
		367
		368	/*****************************************************************************/
		369
		370	static void (*syserr_cb)(const char *msg);
		371
		372	void
		373	ev_set_syserr_cb (void (*cb)(const char *msg))
		374	{
		375	syserr_cb = cb;
		376	}
		377
		378	static void noinline
		379	syserr (const char *msg)
		380	{
		381	if (!msg)
		382	msg = "(libev) system error";
		383
		384	if (syserr_cb)
		385	syserr_cb (msg);
		386	else
		387	{
		388	perror (msg);
		389	abort ();
		390	}
		391	}
		392
		393	static void *
		394	ev_realloc_emul (void *ptr, long size)
		395	{
		396	/* some systems, notably openbsd and darwin, fail to properly
		397	* implement realloc (x, 0) (as required by both ansi c-98 and
		398	* the single unix specification, so work around them here.
		399	*/
		400
		401	if (size)
		402	return realloc (ptr, size);
		403
		404	free (ptr);
		405	return 0;
		406	}
		407
		408	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		409
		410	void
		411	ev_set_allocator (void *(*cb)(void *ptr, long size))
		412	{
		413	alloc = cb;
		414	}
		415
		416	inline_speed void *
		417	ev_realloc (void *ptr, long size)
		418	{
		419	ptr = alloc (ptr, size);
		420
		421	if (!ptr && size)
		422	{
		423	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		424	abort ();
		425	}
		426
		427	return ptr;
		428	}
		429
		430	#define ev_malloc(size) ev_realloc (0, (size))
		431	#define ev_free(ptr) ev_realloc ((ptr), 0)
		432
		433	/*****************************************************************************/
		434
		435	typedef struct
		436	{
		437	WL head;
		438	unsigned char events;
		439	unsigned char reify;
		440	#if EV_SELECT_IS_WINSOCKET
		441	SOCKET handle;
		442	#endif
		443	} ANFD;
		444
		445	typedef struct
		446	{
		447	W w;
		448	int events;
		449	} ANPENDING;
		450
		451	#if EV_USE_INOTIFY
		452	/* hash table entry per inotify-id */
		453	typedef struct
		454	{
		455	WL head;
		456	} ANFS;
		457	#endif
		458
		459	/* Heap Entry */
		460	#if EV_HEAP_CACHE_AT
		461	typedef struct {
		462	ev_tstamp at;
		463	WT w;
		464	} ANHE;
		465
		466	#define ANHE_w(he) (he).w /* access watcher, read-write */
		467	#define ANHE_at(he) (he).at /* access cached at, read-only */
		468	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		469	#else
		470	typedef WT ANHE;
		471
		472	#define ANHE_w(he) (he)
		473	#define ANHE_at(he) (he)->at
		474	#define ANHE_at_cache(he)
		475	#endif
		476
		477	#if EV_MULTIPLICITY
		478
		479	struct ev_loop
		480	{
		481	ev_tstamp ev_rt_now;
		482	#define ev_rt_now ((loop)->ev_rt_now)
		483	#define VAR(name,decl) decl;
		484	#include "ev_vars.h"
		485	#undef VAR
		486	};
20	#include "ev.h"	487	#include "ev_wrap.h"
21		488
22	struct ev_watcher {	489	static struct ev_loop default_loop_struct;
23	EV_WATCHER (ev_watcher);	490	struct ev_loop *ev_default_loop_ptr;
24	};
25		491
26	struct ev_watcher_list {	492	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		493
30	ev_tstamp ev_now;	494	ev_tstamp ev_rt_now;
31	int ev_method;	495	#define VAR(name,decl) static decl;
		496	#include "ev_vars.h"
		497	#undef VAR
32		498
33	static int have_monotonic; /* runtime */	499	static int ev_default_loop_ptr;
34		500
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	501	#endif
36	static void (*method_reify)(void);	502
37	static void (*method_poll)(ev_tstamp timeout);	503	/*****************************************************************************/
38		504
39	ev_tstamp	505	ev_tstamp
40	ev_time (void)	506	ev_time (void)
41	{	507	{
42	#if HAVE_REALTIME	508	#if EV_USE_REALTIME
43	struct timespec ts;	509	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	510	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	511	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	512	#else
47	struct timeval tv;	513	struct timeval tv;
48	gettimeofday (&tv, 0);	514	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	515	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	516	#endif
51	}	517	}
52		518
53	static ev_tstamp	519	ev_tstamp inline_size
54	get_clock (void)	520	get_clock (void)
55	{	521	{
56	#if HAVE_MONOTONIC	522	#if EV_USE_MONOTONIC
57	if (have_monotonic)	523	if (expect_true (have_monotonic))
58	{	524	{
59	struct timespec ts;	525	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	526	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	527	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	528	}
63	#endif	529	#endif
64		530
65	return ev_time ();	531	return ev_time ();
66	}	532	}
67		533
		534	#if EV_MULTIPLICITY
		535	ev_tstamp
		536	ev_now (EV_P)
		537	{
		538	return ev_rt_now;
		539	}
		540	#endif
		541
		542	void
		543	ev_sleep (ev_tstamp delay)
		544	{
		545	if (delay > 0.)
		546	{
		547	#if EV_USE_NANOSLEEP
		548	struct timespec ts;
		549
		550	ts.tv_sec = (time_t)delay;
		551	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		552
		553	nanosleep (&ts, 0);
		554	#elif defined(_WIN32)
		555	Sleep ((unsigned long)(delay * 1e3));
		556	#else
		557	struct timeval tv;
		558
		559	tv.tv_sec = (time_t)delay;
		560	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		561
		562	select (0, 0, 0, 0, &tv);
		563	#endif
		564	}
		565	}
		566
		567	/*****************************************************************************/
		568
		569	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		570
		571	int inline_size
		572	array_nextsize (int elem, int cur, int cnt)
		573	{
		574	int ncur = cur + 1;
		575
		576	do
		577	ncur <<= 1;
		578	while (cnt > ncur);
		579
		580	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		581	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		582	{
		583	ncur *= elem;
		584	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		585	ncur = ncur - sizeof (void *) * 4;
		586	ncur /= elem;
		587	}
		588
		589	return ncur;
		590	}
		591
		592	static noinline void *
		593	array_realloc (int elem, void *base, int *cur, int cnt)
		594	{
		595	*cur = array_nextsize (elem, *cur, cnt);
		596	return ev_realloc (base, elem * *cur);
		597	}
		598
68	#define array_needsize(base,cur,cnt,init) \	599	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	600	if (expect_false ((cnt) > (cur))) \
70	{ \	601	{ \
71	int newcnt = cur ? cur << 1 : 16; \	602	int ocur_ = (cur); \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	603	(base) = (type *)array_realloc \
73	base = realloc (base, sizeof (*base) * (newcnt)); \	604	(sizeof (type), (base), &(cur), (cnt)); \
74	init (base + cur, newcnt - cur); \	605	init ((base) + (ocur_), (cur) - ocur_); \
75	cur = newcnt; \	606	}
		607
		608	#if 0
		609	#define array_slim(type,stem) \
		610	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		611	{ \
		612	stem ## max = array_roundsize (stem ## cnt >> 1); \
		613	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		614	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		615	}
		616	#endif
		617
		618	#define array_free(stem, idx) \
		619	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		620
		621	/*****************************************************************************/
		622
		623	void noinline
		624	ev_feed_event (EV_P_ void *w, int revents)
		625	{
		626	W w_ = (W)w;
		627	int pri = ABSPRI (w_);
		628
		629	if (expect_false (w_->pending))
		630	pendings [pri][w_->pending - 1].events |= revents;
		631	else
		632	{
		633	w_->pending = ++pendingcnt [pri];
		634	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		635	pendings [pri][w_->pending - 1].w = w_;
		636	pendings [pri][w_->pending - 1].events = revents;
		637	}
		638	}
		639
		640	void inline_speed
		641	queue_events (EV_P_ W *events, int eventcnt, int type)
		642	{
		643	int i;
		644
		645	for (i = 0; i < eventcnt; ++i)
		646	ev_feed_event (EV_A_ events [i], type);
		647	}
		648
		649	/*****************************************************************************/
		650
		651	void inline_size
		652	anfds_init (ANFD *base, int count)
		653	{
		654	while (count--)
		655	{
		656	base->head = 0;
		657	base->events = EV_NONE;
		658	base->reify = 0;
		659
		660	++base;
		661	}
		662	}
		663
		664	void inline_speed
		665	fd_event (EV_P_ int fd, int revents)
		666	{
		667	ANFD *anfd = anfds + fd;
		668	ev_io *w;
		669
		670	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		671	{
		672	int ev = w->events & revents;
		673
		674	if (ev)
		675	ev_feed_event (EV_A_ (W)w, ev);
		676	}
		677	}
		678
		679	void
		680	ev_feed_fd_event (EV_P_ int fd, int revents)
		681	{
		682	if (fd >= 0 && fd < anfdmax)
		683	fd_event (EV_A_ fd, revents);
		684	}
		685
		686	void inline_size
		687	fd_reify (EV_P)
		688	{
		689	int i;
		690
		691	for (i = 0; i < fdchangecnt; ++i)
		692	{
		693	int fd = fdchanges [i];
		694	ANFD *anfd = anfds + fd;
		695	ev_io *w;
		696
		697	unsigned char events = 0;
		698
		699	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		700	events |= (unsigned char)w->events;
		701
		702	#if EV_SELECT_IS_WINSOCKET
		703	if (events)
		704	{
		705	unsigned long argp;
		706	#ifdef EV_FD_TO_WIN32_HANDLE
		707	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		708	#else
		709	anfd->handle = _get_osfhandle (fd);
		710	#endif
		711	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		712	}
		713	#endif
		714
		715	{
		716	unsigned char o_events = anfd->events;
		717	unsigned char o_reify = anfd->reify;
		718
		719	anfd->reify = 0;
		720	anfd->events = events;
		721
		722	if (o_events != events || o_reify & EV_IOFDSET)
		723	backend_modify (EV_A_ fd, o_events, events);
76	}	724	}
		725	}
		726
		727	fdchangecnt = 0;
		728	}
		729
		730	void inline_size
		731	fd_change (EV_P_ int fd, int flags)
		732	{
		733	unsigned char reify = anfds [fd].reify;
		734	anfds [fd].reify |= flags;
		735
		736	if (expect_true (!reify))
		737	{
		738	++fdchangecnt;
		739	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		740	fdchanges [fdchangecnt - 1] = fd;
		741	}
		742	}
		743
		744	void inline_speed
		745	fd_kill (EV_P_ int fd)
		746	{
		747	ev_io *w;
		748
		749	while ((w = (ev_io *)anfds [fd].head))
		750	{
		751	ev_io_stop (EV_A_ w);
		752	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		753	}
		754	}
		755
		756	int inline_size
		757	fd_valid (int fd)
		758	{
		759	#ifdef _WIN32
		760	return _get_osfhandle (fd) != -1;
		761	#else
		762	return fcntl (fd, F_GETFD) != -1;
		763	#endif
		764	}
		765
		766	/* called on EBADF to verify fds */
		767	static void noinline
		768	fd_ebadf (EV_P)
		769	{
		770	int fd;
		771
		772	for (fd = 0; fd < anfdmax; ++fd)
		773	if (anfds [fd].events)
		774	if (!fd_valid (fd) == -1 && errno == EBADF)
		775	fd_kill (EV_A_ fd);
		776	}
		777
		778	/* called on ENOMEM in select/poll to kill some fds and retry */
		779	static void noinline
		780	fd_enomem (EV_P)
		781	{
		782	int fd;
		783
		784	for (fd = anfdmax; fd--; )
		785	if (anfds [fd].events)
		786	{
		787	fd_kill (EV_A_ fd);
		788	return;
		789	}
		790	}
		791
		792	/* usually called after fork if backend needs to re-arm all fds from scratch */
		793	static void noinline
		794	fd_rearm_all (EV_P)
		795	{
		796	int fd;
		797
		798	for (fd = 0; fd < anfdmax; ++fd)
		799	if (anfds [fd].events)
		800	{
		801	anfds [fd].events = 0;
		802	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		803	}
		804	}
		805
		806	/*****************************************************************************/
		807
		808	/*
		809	* the heap functions want a real array index. array index 0 uis guaranteed to not
		810	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		811	* the branching factor of the d-tree.
		812	*/
		813
		814	/*
		815	* at the moment we allow libev the luxury of two heaps,
		816	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		817	* which is more cache-efficient.
		818	* the difference is about 5% with 50000+ watchers.
		819	*/
		820	#if EV_USE_4HEAP
		821
		822	#define DHEAP 4
		823	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		824	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		825	#define UPHEAP_DONE(p,k) ((p) == (k))
		826
		827	/* away from the root */
		828	void inline_speed
		829	downheap (ANHE *heap, int N, int k)
		830	{
		831	ANHE he = heap [k];
		832	ANHE *E = heap + N + HEAP0;
		833
		834	for (;;)
		835	{
		836	ev_tstamp minat;
		837	ANHE *minpos;
		838	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
		839
		840	/* find minimum child */
		841	if (expect_true (pos + DHEAP - 1 < E))
		842	{
		843	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		844	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		845	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		846	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		847	}
		848	else if (pos < E)
		849	{
		850	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		851	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		852	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		853	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		854	}
		855	else
		856	break;
		857
		858	if (ANHE_at (he) <= minat)
		859	break;
		860
		861	heap [k] = *minpos;
		862	ev_active (ANHE_w (*minpos)) = k;
		863
		864	k = minpos - heap;
		865	}
		866
		867	heap [k] = he;
		868	ev_active (ANHE_w (he)) = k;
		869	}
		870
		871	#else /* 4HEAP */
		872
		873	#define HEAP0 1
		874	#define HPARENT(k) ((k) >> 1)
		875	#define UPHEAP_DONE(p,k) (!(p))
		876
		877	/* away from the root */
		878	void inline_speed
		879	downheap (ANHE *heap, int N, int k)
		880	{
		881	ANHE he = heap [k];
		882
		883	for (;;)
		884	{
		885	int c = k << 1;
		886
		887	if (c > N + HEAP0 - 1)
		888	break;
		889
		890	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		891	? 1 : 0;
		892
		893	if (ANHE_at (he) <= ANHE_at (heap [c]))
		894	break;
		895
		896	heap [k] = heap [c];
		897	ev_active (ANHE_w (heap [k])) = k;
		898
		899	k = c;
		900	}
		901
		902	heap [k] = he;
		903	ev_active (ANHE_w (he)) = k;
		904	}
		905	#endif
		906
		907	/* towards the root */
		908	void inline_speed
		909	upheap (ANHE *heap, int k)
		910	{
		911	ANHE he = heap [k];
		912
		913	for (;;)
		914	{
		915	int p = HPARENT (k);
		916
		917	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		918	break;
		919
		920	heap [k] = heap [p];
		921	ev_active (ANHE_w (heap [k])) = k;
		922	k = p;
		923	}
		924
		925	heap [k] = he;
		926	ev_active (ANHE_w (he)) = k;
		927	}
		928
		929	void inline_size
		930	adjustheap (ANHE *heap, int N, int k)
		931	{
		932	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
		933	upheap (heap, k);
		934	else
		935	downheap (heap, N, k);
		936	}
		937
		938	/* rebuild the heap: this function is used only once and executed rarely */
		939	void inline_size
		940	reheap (ANHE *heap, int N)
		941	{
		942	int i;
		943	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		944	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		945	for (i = 0; i < N; ++i)
		946	upheap (heap, i + HEAP0);
		947	}
		948
		949	#if EV_VERIFY
		950	static void
		951	checkheap (ANHE *heap, int N)
		952	{
		953	int i;
		954
		955	for (i = HEAP0; i < N + HEAP0; ++i)
		956	{
		957	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		958	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		959	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		960	}
		961	}
		962	#endif
		963
		964	/*****************************************************************************/
77		965
78	typedef struct	966	typedef struct
79	{	967	{
80	struct ev_io *head;	968	WL head;
81	unsigned char wev, rev; /* want, received event set */	969	EV_ATOMIC_T gotsig;
82	} ANFD;	970	} ANSIG;
83		971
84	static ANFD *anfds;	972	static ANSIG *signals;
85	static int anfdmax;	973	static int signalmax;
86		974
87	static int *fdchanges;	975	static EV_ATOMIC_T gotsig;
88	static int fdchangemax, fdchangecnt;	976
		977	void inline_size
		978	signals_init (ANSIG *base, int count)
		979	{
		980	while (count--)
		981	{
		982	base->head = 0;
		983	base->gotsig = 0;
		984
		985	++base;
		986	}
		987	}
		988
		989	/*****************************************************************************/
		990
		991	void inline_speed
		992	fd_intern (int fd)
		993	{
		994	#ifdef _WIN32
		995	int arg = 1;
		996	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		997	#else
		998	fcntl (fd, F_SETFD, FD_CLOEXEC);
		999	fcntl (fd, F_SETFL, O_NONBLOCK);
		1000	#endif
		1001	}
		1002
		1003	static void noinline
		1004	evpipe_init (EV_P)
		1005	{
		1006	if (!ev_is_active (&pipeev))
		1007	{
		1008	#if EV_USE_EVENTFD
		1009	if ((evfd = eventfd (0, 0)) >= 0)
		1010	{
		1011	evpipe [0] = -1;
		1012	fd_intern (evfd);
		1013	ev_io_set (&pipeev, evfd, EV_READ);
		1014	}
		1015	else
		1016	#endif
		1017	{
		1018	while (pipe (evpipe))
		1019	syserr ("(libev) error creating signal/async pipe");
		1020
		1021	fd_intern (evpipe [0]);
		1022	fd_intern (evpipe [1]);
		1023	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1024	}
		1025
		1026	ev_io_start (EV_A_ &pipeev);
		1027	ev_unref (EV_A); /* watcher should not keep loop alive */
		1028	}
		1029	}
		1030
		1031	void inline_size
		1032	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1033	{
		1034	if (!*flag)
		1035	{
		1036	int old_errno = errno; /* save errno because write might clobber it */
		1037
		1038	*flag = 1;
		1039
		1040	#if EV_USE_EVENTFD
		1041	if (evfd >= 0)
		1042	{
		1043	uint64_t counter = 1;
		1044	write (evfd, &counter, sizeof (uint64_t));
		1045	}
		1046	else
		1047	#endif
		1048	write (evpipe [1], &old_errno, 1);
		1049
		1050	errno = old_errno;
		1051	}
		1052	}
89		1053
90	static void	1054	static void
91	anfds_init (ANFD *base, int count)	1055	pipecb (EV_P_ ev_io *iow, int revents)
92	{	1056	{
93	while (count--)	1057	#if EV_USE_EVENTFD
94	{	1058	if (evfd >= 0)
95	base->head = 0;
96	base->wev = base->rev = EV_NONE;
97	++base;
98	}	1059	{
99	}	1060	uint64_t counter;
		1061	read (evfd, &counter, sizeof (uint64_t));
		1062	}
		1063	else
		1064	#endif
		1065	{
		1066	char dummy;
		1067	read (evpipe [0], &dummy, 1);
		1068	}
100		1069
101	typedef struct	1070	if (gotsig && ev_is_default_loop (EV_A))
102	{	1071	{
103	struct ev_watcher *w;	1072	int signum;
104	int events;	1073	gotsig = 0;
105	} ANPENDING;
106		1074
107	static ANPENDING *pendings;	1075	for (signum = signalmax; signum--; )
108	static int pendingmax, pendingcnt;	1076	if (signals [signum].gotsig)
		1077	ev_feed_signal_event (EV_A_ signum + 1);
		1078	}
		1079
		1080	#if EV_ASYNC_ENABLE
		1081	if (gotasync)
		1082	{
		1083	int i;
		1084	gotasync = 0;
		1085
		1086	for (i = asynccnt; i--; )
		1087	if (asyncs [i]->sent)
		1088	{
		1089	asyncs [i]->sent = 0;
		1090	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1091	}
		1092	}
		1093	#endif
		1094	}
		1095
		1096	/*****************************************************************************/
109		1097
110	static void	1098	static void
111	event (struct ev_watcher *w, int events)	1099	ev_sighandler (int signum)
112	{	1100	{
113	w->pending = ++pendingcnt;	1101	#if EV_MULTIPLICITY
114	array_needsize (pendings, pendingmax, pendingcnt, );	1102	struct ev_loop *loop = &default_loop_struct;
115	pendings [pendingcnt - 1].w = w;	1103	#endif
116	pendings [pendingcnt - 1].events = events;	1104
		1105	#if _WIN32
		1106	signal (signum, ev_sighandler);
		1107	#endif
		1108
		1109	signals [signum - 1].gotsig = 1;
		1110	evpipe_write (EV_A_ &gotsig);
117	}	1111	}
		1112
		1113	void noinline
		1114	ev_feed_signal_event (EV_P_ int signum)
		1115	{
		1116	WL w;
		1117
		1118	#if EV_MULTIPLICITY
		1119	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1120	#endif
		1121
		1122	--signum;
		1123
		1124	if (signum < 0 || signum >= signalmax)
		1125	return;
		1126
		1127	signals [signum].gotsig = 0;
		1128
		1129	for (w = signals [signum].head; w; w = w->next)
		1130	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1131	}
		1132
		1133	/*****************************************************************************/
		1134
		1135	static WL childs [EV_PID_HASHSIZE];
		1136
		1137	#ifndef _WIN32
		1138
		1139	static ev_signal childev;
		1140
		1141	#ifndef WIFCONTINUED
		1142	# define WIFCONTINUED(status) 0
		1143	#endif
		1144
		1145	void inline_speed
		1146	child_reap (EV_P_ int chain, int pid, int status)
		1147	{
		1148	ev_child *w;
		1149	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1150
		1151	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1152	{
		1153	if ((w->pid == pid || !w->pid)
		1154	&& (!traced || (w->flags & 1)))
		1155	{
		1156	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1157	w->rpid = pid;
		1158	w->rstatus = status;
		1159	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1160	}
		1161	}
		1162	}
		1163
		1164	#ifndef WCONTINUED
		1165	# define WCONTINUED 0
		1166	#endif
118		1167
119	static void	1168	static void
120	fd_event (int fd, int events)	1169	childcb (EV_P_ ev_signal *sw, int revents)
121	{	1170	{
122	ANFD *anfd = anfds + fd;	1171	int pid, status;
123	struct ev_io *w;
124		1172
125	for (w = anfd->head; w; w = w->next)	1173	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1174	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		1175	if (!WCONTINUED
		1176	|| errno != EINVAL
		1177	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1178	return;
		1179
		1180	/* make sure we are called again until all children have been reaped */
		1181	/* we need to do it this way so that the callback gets called before we continue */
		1182	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1183
		1184	child_reap (EV_A_ pid, pid, status);
		1185	if (EV_PID_HASHSIZE > 1)
		1186	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1187	}
		1188
		1189	#endif
		1190
		1191	/*****************************************************************************/
		1192
		1193	#if EV_USE_PORT
		1194	# include "ev_port.c"
		1195	#endif
		1196	#if EV_USE_KQUEUE
		1197	# include "ev_kqueue.c"
		1198	#endif
		1199	#if EV_USE_EPOLL
		1200	# include "ev_epoll.c"
		1201	#endif
		1202	#if EV_USE_POLL
		1203	# include "ev_poll.c"
		1204	#endif
		1205	#if EV_USE_SELECT
		1206	# include "ev_select.c"
		1207	#endif
		1208
		1209	int
		1210	ev_version_major (void)
		1211	{
		1212	return EV_VERSION_MAJOR;
		1213	}
		1214
		1215	int
		1216	ev_version_minor (void)
		1217	{
		1218	return EV_VERSION_MINOR;
		1219	}
		1220
		1221	/* return true if we are running with elevated privileges and should ignore env variables */
		1222	int inline_size
		1223	enable_secure (void)
		1224	{
		1225	#ifdef _WIN32
		1226	return 0;
		1227	#else
		1228	return getuid () != geteuid ()
		1229	|| getgid () != getegid ();
		1230	#endif
		1231	}
		1232
		1233	unsigned int
		1234	ev_supported_backends (void)
		1235	{
		1236	unsigned int flags = 0;
		1237
		1238	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1239	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1240	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1241	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1242	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1243
		1244	return flags;
		1245	}
		1246
		1247	unsigned int
		1248	ev_recommended_backends (void)
		1249	{
		1250	unsigned int flags = ev_supported_backends ();
		1251
		1252	#ifndef __NetBSD__
		1253	/* kqueue is borked on everything but netbsd apparently */
		1254	/* it usually doesn't work correctly on anything but sockets and pipes */
		1255	flags &= ~EVBACKEND_KQUEUE;
		1256	#endif
		1257	#ifdef __APPLE__
		1258	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1259	flags &= ~EVBACKEND_POLL;
		1260	#endif
		1261
		1262	return flags;
		1263	}
		1264
		1265	unsigned int
		1266	ev_embeddable_backends (void)
		1267	{
		1268	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1269
		1270	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1271	/* please fix it and tell me how to detect the fix */
		1272	flags &= ~EVBACKEND_EPOLL;
		1273
		1274	return flags;
		1275	}
		1276
		1277	unsigned int
		1278	ev_backend (EV_P)
		1279	{
		1280	return backend;
		1281	}
		1282
		1283	unsigned int
		1284	ev_loop_count (EV_P)
		1285	{
		1286	return loop_count;
		1287	}
		1288
		1289	void
		1290	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1291	{
		1292	io_blocktime = interval;
		1293	}
		1294
		1295	void
		1296	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1297	{
		1298	timeout_blocktime = interval;
		1299	}
		1300
		1301	static void noinline
		1302	loop_init (EV_P_ unsigned int flags)
		1303	{
		1304	if (!backend)
		1305	{
		1306	#if EV_USE_MONOTONIC
126	{	1307	{
127	int ev = w->events & events;	1308	struct timespec ts;
128		1309	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
129	if (ev)	1310	have_monotonic = 1;
130	event ((struct ev_watcher *)w, ev);
131	}	1311	}
132	}	1312	#endif
133		1313
134	static struct ev_timer **timers;	1314	ev_rt_now = ev_time ();
135	static int timermax, timercnt;	1315	mn_now = get_clock ();
		1316	now_floor = mn_now;
		1317	rtmn_diff = ev_rt_now - mn_now;
136		1318
		1319	io_blocktime = 0.;
		1320	timeout_blocktime = 0.;
		1321	backend = 0;
		1322	backend_fd = -1;
		1323	gotasync = 0;
		1324	#if EV_USE_INOTIFY
		1325	fs_fd = -2;
		1326	#endif
		1327
		1328	/* pid check not overridable via env */
		1329	#ifndef _WIN32
		1330	if (flags & EVFLAG_FORKCHECK)
		1331	curpid = getpid ();
		1332	#endif
		1333
		1334	if (!(flags & EVFLAG_NOENV)
		1335	&& !enable_secure ()
		1336	&& getenv ("LIBEV_FLAGS"))
		1337	flags = atoi (getenv ("LIBEV_FLAGS"));
		1338
		1339	if (!(flags & 0x0000ffffU))
		1340	flags |= ev_recommended_backends ();
		1341
		1342	#if EV_USE_PORT
		1343	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1344	#endif
		1345	#if EV_USE_KQUEUE
		1346	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1347	#endif
		1348	#if EV_USE_EPOLL
		1349	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1350	#endif
		1351	#if EV_USE_POLL
		1352	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1353	#endif
		1354	#if EV_USE_SELECT
		1355	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1356	#endif
		1357
		1358	ev_init (&pipeev, pipecb);
		1359	ev_set_priority (&pipeev, EV_MAXPRI);
		1360	}
		1361	}
		1362
		1363	static void noinline
		1364	loop_destroy (EV_P)
		1365	{
		1366	int i;
		1367
		1368	if (ev_is_active (&pipeev))
		1369	{
		1370	ev_ref (EV_A); /* signal watcher */
		1371	ev_io_stop (EV_A_ &pipeev);
		1372
		1373	#if EV_USE_EVENTFD
		1374	if (evfd >= 0)
		1375	close (evfd);
		1376	#endif
		1377
		1378	if (evpipe [0] >= 0)
		1379	{
		1380	close (evpipe [0]);
		1381	close (evpipe [1]);
		1382	}
		1383	}
		1384
		1385	#if EV_USE_INOTIFY
		1386	if (fs_fd >= 0)
		1387	close (fs_fd);
		1388	#endif
		1389
		1390	if (backend_fd >= 0)
		1391	close (backend_fd);
		1392
		1393	#if EV_USE_PORT
		1394	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1395	#endif
		1396	#if EV_USE_KQUEUE
		1397	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1398	#endif
		1399	#if EV_USE_EPOLL
		1400	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1401	#endif
		1402	#if EV_USE_POLL
		1403	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1404	#endif
		1405	#if EV_USE_SELECT
		1406	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1407	#endif
		1408
		1409	for (i = NUMPRI; i--; )
		1410	{
		1411	array_free (pending, [i]);
		1412	#if EV_IDLE_ENABLE
		1413	array_free (idle, [i]);
		1414	#endif
		1415	}
		1416
		1417	ev_free (anfds); anfdmax = 0;
		1418
		1419	/* have to use the microsoft-never-gets-it-right macro */
		1420	array_free (fdchange, EMPTY);
		1421	array_free (timer, EMPTY);
		1422	#if EV_PERIODIC_ENABLE
		1423	array_free (periodic, EMPTY);
		1424	#endif
		1425	#if EV_FORK_ENABLE
		1426	array_free (fork, EMPTY);
		1427	#endif
		1428	array_free (prepare, EMPTY);
		1429	array_free (check, EMPTY);
		1430	#if EV_ASYNC_ENABLE
		1431	array_free (async, EMPTY);
		1432	#endif
		1433
		1434	backend = 0;
		1435	}
		1436
		1437	#if EV_USE_INOTIFY
		1438	void inline_size infy_fork (EV_P);
		1439	#endif
		1440
		1441	void inline_size
		1442	loop_fork (EV_P)
		1443	{
		1444	#if EV_USE_PORT
		1445	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1446	#endif
		1447	#if EV_USE_KQUEUE
		1448	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1449	#endif
		1450	#if EV_USE_EPOLL
		1451	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1452	#endif
		1453	#if EV_USE_INOTIFY
		1454	infy_fork (EV_A);
		1455	#endif
		1456
		1457	if (ev_is_active (&pipeev))
		1458	{
		1459	/* this "locks" the handlers against writing to the pipe */
		1460	/* while we modify the fd vars */
		1461	gotsig = 1;
		1462	#if EV_ASYNC_ENABLE
		1463	gotasync = 1;
		1464	#endif
		1465
		1466	ev_ref (EV_A);
		1467	ev_io_stop (EV_A_ &pipeev);
		1468
		1469	#if EV_USE_EVENTFD
		1470	if (evfd >= 0)
		1471	close (evfd);
		1472	#endif
		1473
		1474	if (evpipe [0] >= 0)
		1475	{
		1476	close (evpipe [0]);
		1477	close (evpipe [1]);
		1478	}
		1479
		1480	evpipe_init (EV_A);
		1481	/* now iterate over everything, in case we missed something */
		1482	pipecb (EV_A_ &pipeev, EV_READ);
		1483	}
		1484
		1485	postfork = 0;
		1486	}
		1487
		1488	#if EV_MULTIPLICITY
		1489	struct ev_loop *
		1490	ev_loop_new (unsigned int flags)
		1491	{
		1492	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1493
		1494	memset (loop, 0, sizeof (struct ev_loop));
		1495
		1496	loop_init (EV_A_ flags);
		1497
		1498	if (ev_backend (EV_A))
		1499	return loop;
		1500
		1501	return 0;
		1502	}
		1503
		1504	void
		1505	ev_loop_destroy (EV_P)
		1506	{
		1507	loop_destroy (EV_A);
		1508	ev_free (loop);
		1509	}
		1510
		1511	void
		1512	ev_loop_fork (EV_P)
		1513	{
		1514	postfork = 1; /* must be in line with ev_default_fork */
		1515	}
		1516
		1517	#if EV_VERIFY
137	static void	1518	static void
138	upheap (int k)	1519	array_check (W **ws, int cnt)
139	{	1520	{
140	struct ev_timer *w = timers [k];	1521	while (cnt--)
141		1522	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
142	while (k && timers [k >> 1]->at > w->at)
143	{
144	timers [k] = timers [k >> 1];
145	timers [k]->active = k + 1;
146	k >>= 1;
147	}
148
149	timers [k] = w;
150	timers [k]->active = k + 1;
151
152	}	1523	}
153		1524
154	static void	1525	static void
155	downheap (int k)	1526	ev_loop_verify (EV_P)
156	{
157	struct ev_timer *w = timers [k];
158
159	while (k < (timercnt >> 1))
160	{
161	int j = k << 1;
162
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)
164	++j;
165
166	if (w->at <= timers [j]->at)
167	break;
168
169	timers [k] = timers [j];
170	timers [k]->active = k + 1;
171	k = j;
172	}
173
174	timers [k] = w;
175	timers [k]->active = k + 1;
176	}
177
178	static struct ev_signal **signals;
179	static int signalmax, signalcnt;
180
181	static void
182	signals_init (struct ev_signal **base, int count)
183	{
184	while (count--)
185	*base++ = 0;
186	}
187
188	#if HAVE_EPOLL
189	# include "ev_epoll.c"
190	#endif
191	#if HAVE_SELECT
192	# include "ev_select.c"
193	#endif
194
195	int ev_init (int flags)
196	{
197	#if HAVE_MONOTONIC
198	{
199	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;
202	}
203	#endif
204
205	ev_now = ev_time ();
206
207	#if HAVE_EPOLL
208	if (epoll_init (flags))
209	return ev_method;
210	#endif
211	#if HAVE_SELECT
212	if (select_init (flags))
213	return ev_method;
214	#endif
215
216	ev_method = EVMETHOD_NONE;
217	return ev_method;
218	}
219
220	void ev_prefork (void)
221	{
222	}
223
224	void ev_postfork_parent (void)
225	{
226	}
227
228	void ev_postfork_child (void)
229	{
230	#if HAVE_EPOLL
231	epoll_postfork_child ();
232	#endif
233	}
234
235	static void
236	call_pending ()
237	{	1527	{
238	int i;	1528	int i;
239		1529
240	for (i = 0; i < pendingcnt; ++i)	1530	checkheap (timers, timercnt);
241	{	1531	#if EV_PERIODIC_ENABLE
242	ANPENDING *p = pendings + i;	1532	checkheap (periodics, periodiccnt);
		1533	#endif
243		1534
244	if (p->w)	1535	#if EV_IDLE_ENABLE
		1536	for (i = NUMPRI; i--; )
		1537	array_check ((W **)idles [i], idlecnt [i]);
		1538	#endif
		1539	#if EV_FORK_ENABLE
		1540	array_check ((W **)forks, forkcnt);
		1541	#endif
		1542	array_check ((W **)prepares, preparecnt);
		1543	array_check ((W **)checks, checkcnt);
		1544	#if EV_ASYNC_ENABLE
		1545	array_check ((W **)asyncs, asynccnt);
		1546	#endif
		1547	}
		1548	#endif
		1549
		1550	#endif
		1551
		1552	#if EV_MULTIPLICITY
		1553	struct ev_loop *
		1554	ev_default_loop_init (unsigned int flags)
		1555	#else
		1556	int
		1557	ev_default_loop (unsigned int flags)
		1558	#endif
		1559	{
		1560	if (!ev_default_loop_ptr)
		1561	{
		1562	#if EV_MULTIPLICITY
		1563	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1564	#else
		1565	ev_default_loop_ptr = 1;
		1566	#endif
		1567
		1568	loop_init (EV_A_ flags);
		1569
		1570	if (ev_backend (EV_A))
245	{	1571	{
246	p->w->pending = 0;	1572	#ifndef _WIN32
247	p->w->cb (p->w, p->events);	1573	ev_signal_init (&childev, childcb, SIGCHLD);
		1574	ev_set_priority (&childev, EV_MAXPRI);
		1575	ev_signal_start (EV_A_ &childev);
		1576	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1577	#endif
248	}	1578	}
		1579	else
		1580	ev_default_loop_ptr = 0;
249	}	1581	}
250		1582
251	pendingcnt = 0;	1583	return ev_default_loop_ptr;
252	}	1584	}
253		1585
254	static void	1586	void
255	timer_reify (void)	1587	ev_default_destroy (void)
256	{	1588	{
257	while (timercnt && timers [0]->at <= ev_now)	1589	#if EV_MULTIPLICITY
		1590	struct ev_loop *loop = ev_default_loop_ptr;
		1591	#endif
		1592
		1593	#ifndef _WIN32
		1594	ev_ref (EV_A); /* child watcher */
		1595	ev_signal_stop (EV_A_ &childev);
		1596	#endif
		1597
		1598	loop_destroy (EV_A);
		1599	}
		1600
		1601	void
		1602	ev_default_fork (void)
		1603	{
		1604	#if EV_MULTIPLICITY
		1605	struct ev_loop *loop = ev_default_loop_ptr;
		1606	#endif
		1607
		1608	if (backend)
		1609	postfork = 1; /* must be in line with ev_loop_fork */
		1610	}
		1611
		1612	/*****************************************************************************/
		1613
		1614	void
		1615	ev_invoke (EV_P_ void *w, int revents)
		1616	{
		1617	EV_CB_INVOKE ((W)w, revents);
		1618	}
		1619
		1620	void inline_speed
		1621	call_pending (EV_P)
		1622	{
		1623	int pri;
		1624
		1625	EV_FREQUENT_CHECK;
		1626
		1627	for (pri = NUMPRI; pri--; )
		1628	while (pendingcnt [pri])
258	{	1629	{
259	struct ev_timer *w = timers [0];	1630	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
260		1631
		1632	if (expect_true (p->w))
		1633	{
		1634	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1635
		1636	p->w->pending = 0;
		1637	EV_CB_INVOKE (p->w, p->events);
		1638	}
		1639	}
		1640
		1641	EV_FREQUENT_CHECK;
		1642	}
		1643
		1644	#if EV_IDLE_ENABLE
		1645	void inline_size
		1646	idle_reify (EV_P)
		1647	{
		1648	if (expect_false (idleall))
		1649	{
		1650	int pri;
		1651
		1652	for (pri = NUMPRI; pri--; )
		1653	{
		1654	if (pendingcnt [pri])
		1655	break;
		1656
		1657	if (idlecnt [pri])
		1658	{
		1659	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1660	break;
		1661	}
		1662	}
		1663	}
		1664	}
		1665	#endif
		1666
		1667	void inline_size
		1668	timers_reify (EV_P)
		1669	{
		1670	EV_FREQUENT_CHECK;
		1671
		1672	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
		1673	{
		1674	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1675
		1676	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1677
261	/* first reschedule timer */	1678	/* first reschedule or stop timer */
262	if (w->repeat)	1679	if (w->repeat)
263	{	1680	{
264	if (w->is_abs)
265	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
266	else
267	w->at = ev_now + w->repeat;	1681	ev_at (w) += w->repeat;
		1682	if (ev_at (w) < mn_now)
		1683	ev_at (w) = mn_now;
268		1684
269	downheap (0);	1685	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1686
		1687	ANHE_at_cache (timers [HEAP0]);
		1688	downheap (timers, timercnt, HEAP0);
270	}	1689	}
271	else	1690	else
272	evtimer_stop (w); /* nonrepeating: stop timer */	1691	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
273		1692
274	event ((struct ev_watcher *)w, EV_TIMEOUT);	1693	EV_FREQUENT_CHECK;
		1694	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1695	}
		1696	}
		1697
		1698	#if EV_PERIODIC_ENABLE
		1699	void inline_size
		1700	periodics_reify (EV_P)
		1701	{
		1702	EV_FREQUENT_CHECK;
		1703	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
275	}	1704	{
276	}	1705	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
277		1706
278	int ev_loop_done;	1707	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
279		1708
		1709	/* first reschedule or stop timer */
		1710	if (w->reschedule_cb)
		1711	{
		1712	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1713
		1714	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1715
		1716	ANHE_at_cache (periodics [HEAP0]);
		1717	downheap (periodics, periodiccnt, HEAP0);
		1718	EV_FREQUENT_CHECK;
		1719	}
		1720	else if (w->interval)
		1721	{
		1722	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1723	/* if next trigger time is not sufficiently in the future, put it there */
		1724	/* this might happen because of floating point inexactness */
		1725	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1726	{
		1727	ev_at (w) += w->interval;
		1728
		1729	/* if interval is unreasonably low we might still have a time in the past */
		1730	/* so correct this. this will make the periodic very inexact, but the user */
		1731	/* has effectively asked to get triggered more often than possible */
		1732	if (ev_at (w) < ev_rt_now)
		1733	ev_at (w) = ev_rt_now;
		1734	}
		1735
		1736	ANHE_at_cache (periodics [HEAP0]);
		1737	downheap (periodics, periodiccnt, HEAP0);
		1738	}
		1739	else
		1740	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1741
		1742	EV_FREQUENT_CHECK;
		1743	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1744	}
		1745	}
		1746
		1747	static void noinline
		1748	periodics_reschedule (EV_P)
		1749	{
		1750	int i;
		1751
		1752	/* adjust periodics after time jump */
		1753	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1754	{
		1755	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		1756
		1757	if (w->reschedule_cb)
		1758	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1759	else if (w->interval)
		1760	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1761
		1762	ANHE_at_cache (periodics [i]);
		1763	}
		1764
		1765	reheap (periodics, periodiccnt);
		1766	}
		1767	#endif
		1768
		1769	void inline_speed
		1770	time_update (EV_P_ ev_tstamp max_block)
		1771	{
		1772	int i;
		1773
		1774	#if EV_USE_MONOTONIC
		1775	if (expect_true (have_monotonic))
		1776	{
		1777	ev_tstamp odiff = rtmn_diff;
		1778
		1779	mn_now = get_clock ();
		1780
		1781	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1782	/* interpolate in the meantime */
		1783	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1784	{
		1785	ev_rt_now = rtmn_diff + mn_now;
		1786	return;
		1787	}
		1788
		1789	now_floor = mn_now;
		1790	ev_rt_now = ev_time ();
		1791
		1792	/* loop a few times, before making important decisions.
		1793	* on the choice of "4": one iteration isn't enough,
		1794	* in case we get preempted during the calls to
		1795	* ev_time and get_clock. a second call is almost guaranteed
		1796	* to succeed in that case, though. and looping a few more times
		1797	* doesn't hurt either as we only do this on time-jumps or
		1798	* in the unlikely event of having been preempted here.
		1799	*/
		1800	for (i = 4; --i; )
		1801	{
		1802	rtmn_diff = ev_rt_now - mn_now;
		1803
		1804	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1805	return; /* all is well */
		1806
		1807	ev_rt_now = ev_time ();
		1808	mn_now = get_clock ();
		1809	now_floor = mn_now;
		1810	}
		1811
		1812	# if EV_PERIODIC_ENABLE
		1813	periodics_reschedule (EV_A);
		1814	# endif
		1815	/* no timer adjustment, as the monotonic clock doesn't jump */
		1816	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1817	}
		1818	else
		1819	#endif
		1820	{
		1821	ev_rt_now = ev_time ();
		1822
		1823	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1824	{
		1825	#if EV_PERIODIC_ENABLE
		1826	periodics_reschedule (EV_A);
		1827	#endif
		1828	/* adjust timers. this is easy, as the offset is the same for all of them */
		1829	for (i = 0; i < timercnt; ++i)
		1830	{
		1831	ANHE *he = timers + i + HEAP0;
		1832	ANHE_w (*he)->at += ev_rt_now - mn_now;
		1833	ANHE_at_cache (*he);
		1834	}
		1835	}
		1836
		1837	mn_now = ev_rt_now;
		1838	}
		1839	}
		1840
		1841	void
		1842	ev_ref (EV_P)
		1843	{
		1844	++activecnt;
		1845	}
		1846
		1847	void
		1848	ev_unref (EV_P)
		1849	{
		1850	--activecnt;
		1851	}
		1852
		1853	static int loop_done;
		1854
		1855	void
280	int ev_loop (int flags)	1856	ev_loop (EV_P_ int flags)
281	{	1857	{
282	double block;	1858	loop_done = EVUNLOOP_CANCEL;
283	ev_loop_done = flags & EVLOOP_ONESHOT;	1859
		1860	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
284		1861
285	do	1862	do
286	{	1863	{
		1864	#ifndef _WIN32
		1865	if (expect_false (curpid)) /* penalise the forking check even more */
		1866	if (expect_false (getpid () != curpid))
		1867	{
		1868	curpid = getpid ();
		1869	postfork = 1;
		1870	}
		1871	#endif
		1872
		1873	#if EV_FORK_ENABLE
		1874	/* we might have forked, so queue fork handlers */
		1875	if (expect_false (postfork))
		1876	if (forkcnt)
		1877	{
		1878	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1879	call_pending (EV_A);
		1880	}
		1881	#endif
		1882
		1883	/* queue prepare watchers (and execute them) */
		1884	if (expect_false (preparecnt))
		1885	{
		1886	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1887	call_pending (EV_A);
		1888	}
		1889
		1890	if (expect_false (!activecnt))
		1891	break;
		1892
		1893	/* we might have forked, so reify kernel state if necessary */
		1894	if (expect_false (postfork))
		1895	loop_fork (EV_A);
		1896
287	/* update fd-related kernel structures */	1897	/* update fd-related kernel structures */
288	method_reify (); fdchangecnt = 0;	1898	fd_reify (EV_A);
289		1899
290	/* calculate blocking time */	1900	/* calculate blocking time */
291	ev_now = ev_time ();	1901	{
		1902	ev_tstamp waittime = 0.;
		1903	ev_tstamp sleeptime = 0.;
292		1904
293	if (flags & EVLOOP_NONBLOCK)	1905	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
294	block = 0.;
295	else if (!timercnt)
296	block = MAX_BLOCKTIME;
297	else
298	{	1906	{
299	block = timers [0]->at - ev_now + method_fudge;	1907	/* update time to cancel out callback processing overhead */
300	if (block < 0.) block = 0.;	1908	time_update (EV_A_ 1e100);
301	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;	1909
		1910	waittime = MAX_BLOCKTIME;
		1911
		1912	if (timercnt)
		1913	{
		1914	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
		1915	if (waittime > to) waittime = to;
		1916	}
		1917
		1918	#if EV_PERIODIC_ENABLE
		1919	if (periodiccnt)
		1920	{
		1921	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
		1922	if (waittime > to) waittime = to;
		1923	}
		1924	#endif
		1925
		1926	if (expect_false (waittime < timeout_blocktime))
		1927	waittime = timeout_blocktime;
		1928
		1929	sleeptime = waittime - backend_fudge;
		1930
		1931	if (expect_true (sleeptime > io_blocktime))
		1932	sleeptime = io_blocktime;
		1933
		1934	if (sleeptime)
		1935	{
		1936	ev_sleep (sleeptime);
		1937	waittime -= sleeptime;
		1938	}
302	}	1939	}
303		1940
304	method_poll (block);	1941	++loop_count;
		1942	backend_poll (EV_A_ waittime);
305		1943
		1944	/* update ev_rt_now, do magic */
		1945	time_update (EV_A_ waittime + sleeptime);
		1946	}
		1947
306	/* put pending timers into pendign queue and reschedule them */	1948	/* queue pending timers and reschedule them */
		1949	timers_reify (EV_A); /* relative timers called last */
		1950	#if EV_PERIODIC_ENABLE
		1951	periodics_reify (EV_A); /* absolute timers called first */
		1952	#endif
		1953
		1954	#if EV_IDLE_ENABLE
		1955	/* queue idle watchers unless other events are pending */
307	timer_reify ();	1956	idle_reify (EV_A);
		1957	#endif
308		1958
309	ev_now = ev_time ();	1959	/* queue check watchers, to be executed first */
		1960	if (expect_false (checkcnt))
		1961	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1962
310	call_pending ();	1963	call_pending (EV_A);
311	}	1964	}
312	while (!ev_loop_done);	1965	while (expect_true (
313	}	1966	activecnt
		1967	&& !loop_done
		1968	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1969	));
314		1970
315	static void	1971	if (loop_done == EVUNLOOP_ONE)
316	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1972	loop_done = EVUNLOOP_CANCEL;
		1973	}
		1974
		1975	void
		1976	ev_unloop (EV_P_ int how)
		1977	{
		1978	loop_done = how;
		1979	}
		1980
		1981	/*****************************************************************************/
		1982
		1983	void inline_size
		1984	wlist_add (WL *head, WL elem)
317	{	1985	{
318	elem->next = *head;	1986	elem->next = *head;
319	*head = elem;	1987	*head = elem;
320	}	1988	}
321		1989
322	static void	1990	void inline_size
323	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1991	wlist_del (WL *head, WL elem)
324	{	1992	{
325	while (*head)	1993	while (*head)
326	{	1994	{
327	if (*head == elem)	1995	if (*head == elem)
328	{	1996	{
…		…
332		2000
333	head = &(*head)->next;	2001	head = &(*head)->next;
334	}	2002	}
335	}	2003	}
336		2004
		2005	void inline_speed
		2006	clear_pending (EV_P_ W w)
		2007	{
		2008	if (w->pending)
		2009	{
		2010	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		2011	w->pending = 0;
		2012	}
		2013	}
		2014
		2015	int
		2016	ev_clear_pending (EV_P_ void *w)
		2017	{
		2018	W w_ = (W)w;
		2019	int pending = w_->pending;
		2020
		2021	if (expect_true (pending))
		2022	{
		2023	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2024	w_->pending = 0;
		2025	p->w = 0;
		2026	return p->events;
		2027	}
		2028	else
		2029	return 0;
		2030	}
		2031
		2032	void inline_size
		2033	pri_adjust (EV_P_ W w)
		2034	{
		2035	int pri = w->priority;
		2036	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2037	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2038	w->priority = pri;
		2039	}
		2040
		2041	void inline_speed
		2042	ev_start (EV_P_ W w, int active)
		2043	{
		2044	pri_adjust (EV_A_ w);
		2045	w->active = active;
		2046	ev_ref (EV_A);
		2047	}
		2048
		2049	void inline_size
		2050	ev_stop (EV_P_ W w)
		2051	{
		2052	ev_unref (EV_A);
		2053	w->active = 0;
		2054	}
		2055
		2056	/*****************************************************************************/
		2057
		2058	void noinline
		2059	ev_io_start (EV_P_ ev_io *w)
		2060	{
		2061	int fd = w->fd;
		2062
		2063	if (expect_false (ev_is_active (w)))
		2064	return;
		2065
		2066	assert (("ev_io_start called with negative fd", fd >= 0));
		2067
		2068	EV_FREQUENT_CHECK;
		2069
		2070	ev_start (EV_A_ (W)w, 1);
		2071	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		2072	wlist_add (&anfds[fd].head, (WL)w);
		2073
		2074	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		2075	w->events &= ~EV_IOFDSET;
		2076
		2077	EV_FREQUENT_CHECK;
		2078	}
		2079
		2080	void noinline
		2081	ev_io_stop (EV_P_ ev_io *w)
		2082	{
		2083	clear_pending (EV_A_ (W)w);
		2084	if (expect_false (!ev_is_active (w)))
		2085	return;
		2086
		2087	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		2088
		2089	EV_FREQUENT_CHECK;
		2090
		2091	wlist_del (&anfds[w->fd].head, (WL)w);
		2092	ev_stop (EV_A_ (W)w);
		2093
		2094	fd_change (EV_A_ w->fd, 1);
		2095
		2096	EV_FREQUENT_CHECK;
		2097	}
		2098
		2099	void noinline
		2100	ev_timer_start (EV_P_ ev_timer *w)
		2101	{
		2102	if (expect_false (ev_is_active (w)))
		2103	return;
		2104
		2105	ev_at (w) += mn_now;
		2106
		2107	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		2108
		2109	EV_FREQUENT_CHECK;
		2110
		2111	++timercnt;
		2112	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
		2113	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
		2114	ANHE_w (timers [ev_active (w)]) = (WT)w;
		2115	ANHE_at_cache (timers [ev_active (w)]);
		2116	upheap (timers, ev_active (w));
		2117
		2118	EV_FREQUENT_CHECK;
		2119
		2120	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
		2121	}
		2122
		2123	void noinline
		2124	ev_timer_stop (EV_P_ ev_timer *w)
		2125	{
		2126	clear_pending (EV_A_ (W)w);
		2127	if (expect_false (!ev_is_active (w)))
		2128	return;
		2129
		2130	EV_FREQUENT_CHECK;
		2131
		2132	{
		2133	int active = ev_active (w);
		2134
		2135	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2136
		2137	--timercnt;
		2138
		2139	if (expect_true (active < timercnt + HEAP0))
		2140	{
		2141	timers [active] = timers [timercnt + HEAP0];
		2142	adjustheap (timers, timercnt, active);
		2143	}
		2144	}
		2145
		2146	EV_FREQUENT_CHECK;
		2147
		2148	ev_at (w) -= mn_now;
		2149
		2150	ev_stop (EV_A_ (W)w);
		2151	}
		2152
		2153	void noinline
		2154	ev_timer_again (EV_P_ ev_timer *w)
		2155	{
		2156	EV_FREQUENT_CHECK;
		2157
		2158	if (ev_is_active (w))
		2159	{
		2160	if (w->repeat)
		2161	{
		2162	ev_at (w) = mn_now + w->repeat;
		2163	ANHE_at_cache (timers [ev_active (w)]);
		2164	adjustheap (timers, timercnt, ev_active (w));
		2165	}
		2166	else
		2167	ev_timer_stop (EV_A_ w);
		2168	}
		2169	else if (w->repeat)
		2170	{
		2171	ev_at (w) = w->repeat;
		2172	ev_timer_start (EV_A_ w);
		2173	}
		2174
		2175	EV_FREQUENT_CHECK;
		2176	}
		2177
		2178	#if EV_PERIODIC_ENABLE
		2179	void noinline
		2180	ev_periodic_start (EV_P_ ev_periodic *w)
		2181	{
		2182	if (expect_false (ev_is_active (w)))
		2183	return;
		2184
		2185	if (w->reschedule_cb)
		2186	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2187	else if (w->interval)
		2188	{
		2189	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		2190	/* this formula differs from the one in periodic_reify because we do not always round up */
		2191	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2192	}
		2193	else
		2194	ev_at (w) = w->offset;
		2195
		2196	EV_FREQUENT_CHECK;
		2197
		2198	++periodiccnt;
		2199	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
		2200	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
		2201	ANHE_w (periodics [ev_active (w)]) = (WT)w;
		2202	ANHE_at_cache (periodics [ev_active (w)]);
		2203	upheap (periodics, ev_active (w));
		2204
		2205	EV_FREQUENT_CHECK;
		2206
		2207	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
		2208	}
		2209
		2210	void noinline
		2211	ev_periodic_stop (EV_P_ ev_periodic *w)
		2212	{
		2213	clear_pending (EV_A_ (W)w);
		2214	if (expect_false (!ev_is_active (w)))
		2215	return;
		2216
		2217	EV_FREQUENT_CHECK;
		2218
		2219	{
		2220	int active = ev_active (w);
		2221
		2222	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2223
		2224	--periodiccnt;
		2225
		2226	if (expect_true (active < periodiccnt + HEAP0))
		2227	{
		2228	periodics [active] = periodics [periodiccnt + HEAP0];
		2229	adjustheap (periodics, periodiccnt, active);
		2230	}
		2231	}
		2232
		2233	EV_FREQUENT_CHECK;
		2234
		2235	ev_stop (EV_A_ (W)w);
		2236	}
		2237
		2238	void noinline
		2239	ev_periodic_again (EV_P_ ev_periodic *w)
		2240	{
		2241	/* TODO: use adjustheap and recalculation */
		2242	ev_periodic_stop (EV_A_ w);
		2243	ev_periodic_start (EV_A_ w);
		2244	}
		2245	#endif
		2246
		2247	#ifndef SA_RESTART
		2248	# define SA_RESTART 0
		2249	#endif
		2250
		2251	void noinline
		2252	ev_signal_start (EV_P_ ev_signal *w)
		2253	{
		2254	#if EV_MULTIPLICITY
		2255	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2256	#endif
		2257	if (expect_false (ev_is_active (w)))
		2258	return;
		2259
		2260	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2261
		2262	evpipe_init (EV_A);
		2263
		2264	EV_FREQUENT_CHECK;
		2265
		2266	{
		2267	#ifndef _WIN32
		2268	sigset_t full, prev;
		2269	sigfillset (&full);
		2270	sigprocmask (SIG_SETMASK, &full, &prev);
		2271	#endif
		2272
		2273	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2274
		2275	#ifndef _WIN32
		2276	sigprocmask (SIG_SETMASK, &prev, 0);
		2277	#endif
		2278	}
		2279
		2280	ev_start (EV_A_ (W)w, 1);
		2281	wlist_add (&signals [w->signum - 1].head, (WL)w);
		2282
		2283	if (!((WL)w)->next)
		2284	{
		2285	#if _WIN32
		2286	signal (w->signum, ev_sighandler);
		2287	#else
		2288	struct sigaction sa;
		2289	sa.sa_handler = ev_sighandler;
		2290	sigfillset (&sa.sa_mask);
		2291	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		2292	sigaction (w->signum, &sa, 0);
		2293	#endif
		2294	}
		2295
		2296	EV_FREQUENT_CHECK;
		2297	}
		2298
		2299	void noinline
		2300	ev_signal_stop (EV_P_ ev_signal *w)
		2301	{
		2302	clear_pending (EV_A_ (W)w);
		2303	if (expect_false (!ev_is_active (w)))
		2304	return;
		2305
		2306	EV_FREQUENT_CHECK;
		2307
		2308	wlist_del (&signals [w->signum - 1].head, (WL)w);
		2309	ev_stop (EV_A_ (W)w);
		2310
		2311	if (!signals [w->signum - 1].head)
		2312	signal (w->signum, SIG_DFL);
		2313
		2314	EV_FREQUENT_CHECK;
		2315	}
		2316
		2317	void
		2318	ev_child_start (EV_P_ ev_child *w)
		2319	{
		2320	#if EV_MULTIPLICITY
		2321	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2322	#endif
		2323	if (expect_false (ev_is_active (w)))
		2324	return;
		2325
		2326	EV_FREQUENT_CHECK;
		2327
		2328	ev_start (EV_A_ (W)w, 1);
		2329	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2330
		2331	EV_FREQUENT_CHECK;
		2332	}
		2333
		2334	void
		2335	ev_child_stop (EV_P_ ev_child *w)
		2336	{
		2337	clear_pending (EV_A_ (W)w);
		2338	if (expect_false (!ev_is_active (w)))
		2339	return;
		2340
		2341	EV_FREQUENT_CHECK;
		2342
		2343	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2344	ev_stop (EV_A_ (W)w);
		2345
		2346	EV_FREQUENT_CHECK;
		2347	}
		2348
		2349	#if EV_STAT_ENABLE
		2350
		2351	# ifdef _WIN32
		2352	# undef lstat
		2353	# define lstat(a,b) _stati64 (a,b)
		2354	# endif
		2355
		2356	#define DEF_STAT_INTERVAL 5.0074891
		2357	#define MIN_STAT_INTERVAL 0.1074891
		2358
		2359	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2360
		2361	#if EV_USE_INOTIFY
		2362	# define EV_INOTIFY_BUFSIZE 8192
		2363
		2364	static void noinline
		2365	infy_add (EV_P_ ev_stat *w)
		2366	{
		2367	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);
		2368
		2369	if (w->wd < 0)
		2370	{
		2371	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2372
		2373	/* monitor some parent directory for speedup hints */
		2374	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2375	/* but an efficiency issue only */
		2376	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2377	{
		2378	char path [4096];
		2379	strcpy (path, w->path);
		2380
		2381	do
		2382	{
		2383	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2384	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2385
		2386	char *pend = strrchr (path, '/');
		2387
		2388	if (!pend)
		2389	break; /* whoops, no '/', complain to your admin */
		2390
		2391	*pend = 0;
		2392	w->wd = inotify_add_watch (fs_fd, path, mask);
		2393	}
		2394	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2395	}
		2396	}
		2397	else
		2398	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2399
		2400	if (w->wd >= 0)
		2401	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2402	}
		2403
		2404	static void noinline
		2405	infy_del (EV_P_ ev_stat *w)
		2406	{
		2407	int slot;
		2408	int wd = w->wd;
		2409
		2410	if (wd < 0)
		2411	return;
		2412
		2413	w->wd = -2;
		2414	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2415	wlist_del (&fs_hash [slot].head, (WL)w);
		2416
		2417	/* remove this watcher, if others are watching it, they will rearm */
		2418	inotify_rm_watch (fs_fd, wd);
		2419	}
		2420
		2421	static void noinline
		2422	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2423	{
		2424	if (slot < 0)
		2425	/* overflow, need to check for all hahs slots */
		2426	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2427	infy_wd (EV_A_ slot, wd, ev);
		2428	else
		2429	{
		2430	WL w_;
		2431
		2432	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2433	{
		2434	ev_stat *w = (ev_stat *)w_;
		2435	w_ = w_->next; /* lets us remove this watcher and all before it */
		2436
		2437	if (w->wd == wd || wd == -1)
		2438	{
		2439	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2440	{
		2441	w->wd = -1;
		2442	infy_add (EV_A_ w); /* re-add, no matter what */
		2443	}
		2444
		2445	stat_timer_cb (EV_A_ &w->timer, 0);
		2446	}
		2447	}
		2448	}
		2449	}
		2450
337	static void	2451	static void
338	ev_start (struct ev_watcher *w, int active)	2452	infy_cb (EV_P_ ev_io *w, int revents)
339	{	2453	{
340	w->pending = 0;	2454	char buf [EV_INOTIFY_BUFSIZE];
341	w->active = active;	2455	struct inotify_event *ev = (struct inotify_event *)buf;
		2456	int ofs;
		2457	int len = read (fs_fd, buf, sizeof (buf));
		2458
		2459	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2460	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2461	}
		2462
		2463	void inline_size
		2464	infy_init (EV_P)
		2465	{
		2466	if (fs_fd != -2)
		2467	return;
		2468
		2469	fs_fd = inotify_init ();
		2470
		2471	if (fs_fd >= 0)
		2472	{
		2473	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2474	ev_set_priority (&fs_w, EV_MAXPRI);
		2475	ev_io_start (EV_A_ &fs_w);
		2476	}
		2477	}
		2478
		2479	void inline_size
		2480	infy_fork (EV_P)
		2481	{
		2482	int slot;
		2483
		2484	if (fs_fd < 0)
		2485	return;
		2486
		2487	close (fs_fd);
		2488	fs_fd = inotify_init ();
		2489
		2490	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2491	{
		2492	WL w_ = fs_hash [slot].head;
		2493	fs_hash [slot].head = 0;
		2494
		2495	while (w_)
		2496	{
		2497	ev_stat *w = (ev_stat *)w_;
		2498	w_ = w_->next; /* lets us add this watcher */
		2499
		2500	w->wd = -1;
		2501
		2502	if (fs_fd >= 0)
		2503	infy_add (EV_A_ w); /* re-add, no matter what */
		2504	else
		2505	ev_timer_start (EV_A_ &w->timer);
		2506	}
		2507
		2508	}
		2509	}
		2510
		2511	#endif
		2512
		2513	void
		2514	ev_stat_stat (EV_P_ ev_stat *w)
		2515	{
		2516	if (lstat (w->path, &w->attr) < 0)
		2517	w->attr.st_nlink = 0;
		2518	else if (!w->attr.st_nlink)
		2519	w->attr.st_nlink = 1;
		2520	}
		2521
		2522	static void noinline
		2523	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2524	{
		2525	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2526
		2527	/* we copy this here each the time so that */
		2528	/* prev has the old value when the callback gets invoked */
		2529	w->prev = w->attr;
		2530	ev_stat_stat (EV_A_ w);
		2531
		2532	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2533	if (
		2534	w->prev.st_dev != w->attr.st_dev
		2535	|| w->prev.st_ino != w->attr.st_ino
		2536	|| w->prev.st_mode != w->attr.st_mode
		2537	|| w->prev.st_nlink != w->attr.st_nlink
		2538	|| w->prev.st_uid != w->attr.st_uid
		2539	|| w->prev.st_gid != w->attr.st_gid
		2540	|| w->prev.st_rdev != w->attr.st_rdev
		2541	|| w->prev.st_size != w->attr.st_size
		2542	|| w->prev.st_atime != w->attr.st_atime
		2543	|| w->prev.st_mtime != w->attr.st_mtime
		2544	|| w->prev.st_ctime != w->attr.st_ctime
		2545	) {
		2546	#if EV_USE_INOTIFY
		2547	infy_del (EV_A_ w);
		2548	infy_add (EV_A_ w);
		2549	ev_stat_stat (EV_A_ w); /* avoid race... */
		2550	#endif
		2551
		2552	ev_feed_event (EV_A_ w, EV_STAT);
		2553	}
		2554	}
		2555
		2556	void
		2557	ev_stat_start (EV_P_ ev_stat *w)
		2558	{
		2559	if (expect_false (ev_is_active (w)))
		2560	return;
		2561
		2562	/* since we use memcmp, we need to clear any padding data etc. */
		2563	memset (&w->prev, 0, sizeof (ev_statdata));
		2564	memset (&w->attr, 0, sizeof (ev_statdata));
		2565
		2566	ev_stat_stat (EV_A_ w);
		2567
		2568	if (w->interval < MIN_STAT_INTERVAL)
		2569	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2570
		2571	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2572	ev_set_priority (&w->timer, ev_priority (w));
		2573
		2574	#if EV_USE_INOTIFY
		2575	infy_init (EV_A);
		2576
		2577	if (fs_fd >= 0)
		2578	infy_add (EV_A_ w);
		2579	else
		2580	#endif
		2581	ev_timer_start (EV_A_ &w->timer);
		2582
		2583	ev_start (EV_A_ (W)w, 1);
		2584
		2585	EV_FREQUENT_CHECK;
		2586	}
		2587
		2588	void
		2589	ev_stat_stop (EV_P_ ev_stat *w)
		2590	{
		2591	clear_pending (EV_A_ (W)w);
		2592	if (expect_false (!ev_is_active (w)))
		2593	return;
		2594
		2595	EV_FREQUENT_CHECK;
		2596
		2597	#if EV_USE_INOTIFY
		2598	infy_del (EV_A_ w);
		2599	#endif
		2600	ev_timer_stop (EV_A_ &w->timer);
		2601
		2602	ev_stop (EV_A_ (W)w);
		2603
		2604	EV_FREQUENT_CHECK;
		2605	}
		2606	#endif
		2607
		2608	#if EV_IDLE_ENABLE
		2609	void
		2610	ev_idle_start (EV_P_ ev_idle *w)
		2611	{
		2612	if (expect_false (ev_is_active (w)))
		2613	return;
		2614
		2615	pri_adjust (EV_A_ (W)w);
		2616
		2617	EV_FREQUENT_CHECK;
		2618
		2619	{
		2620	int active = ++idlecnt [ABSPRI (w)];
		2621
		2622	++idleall;
		2623	ev_start (EV_A_ (W)w, active);
		2624
		2625	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2626	idles [ABSPRI (w)][active - 1] = w;
		2627	}
		2628
		2629	EV_FREQUENT_CHECK;
		2630	}
		2631
		2632	void
		2633	ev_idle_stop (EV_P_ ev_idle *w)
		2634	{
		2635	clear_pending (EV_A_ (W)w);
		2636	if (expect_false (!ev_is_active (w)))
		2637	return;
		2638
		2639	EV_FREQUENT_CHECK;
		2640
		2641	{
		2642	int active = ev_active (w);
		2643
		2644	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2645	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2646
		2647	ev_stop (EV_A_ (W)w);
		2648	--idleall;
		2649	}
		2650
		2651	EV_FREQUENT_CHECK;
		2652	}
		2653	#endif
		2654
		2655	void
		2656	ev_prepare_start (EV_P_ ev_prepare *w)
		2657	{
		2658	if (expect_false (ev_is_active (w)))
		2659	return;
		2660
		2661	EV_FREQUENT_CHECK;
		2662
		2663	ev_start (EV_A_ (W)w, ++preparecnt);
		2664	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2665	prepares [preparecnt - 1] = w;
		2666
		2667	EV_FREQUENT_CHECK;
		2668	}
		2669
		2670	void
		2671	ev_prepare_stop (EV_P_ ev_prepare *w)
		2672	{
		2673	clear_pending (EV_A_ (W)w);
		2674	if (expect_false (!ev_is_active (w)))
		2675	return;
		2676
		2677	EV_FREQUENT_CHECK;
		2678
		2679	{
		2680	int active = ev_active (w);
		2681
		2682	prepares [active - 1] = prepares [--preparecnt];
		2683	ev_active (prepares [active - 1]) = active;
		2684	}
		2685
		2686	ev_stop (EV_A_ (W)w);
		2687
		2688	EV_FREQUENT_CHECK;
		2689	}
		2690
		2691	void
		2692	ev_check_start (EV_P_ ev_check *w)
		2693	{
		2694	if (expect_false (ev_is_active (w)))
		2695	return;
		2696
		2697	EV_FREQUENT_CHECK;
		2698
		2699	ev_start (EV_A_ (W)w, ++checkcnt);
		2700	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2701	checks [checkcnt - 1] = w;
		2702
		2703	EV_FREQUENT_CHECK;
		2704	}
		2705
		2706	void
		2707	ev_check_stop (EV_P_ ev_check *w)
		2708	{
		2709	clear_pending (EV_A_ (W)w);
		2710	if (expect_false (!ev_is_active (w)))
		2711	return;
		2712
		2713	EV_FREQUENT_CHECK;
		2714
		2715	{
		2716	int active = ev_active (w);
		2717
		2718	checks [active - 1] = checks [--checkcnt];
		2719	ev_active (checks [active - 1]) = active;
		2720	}
		2721
		2722	ev_stop (EV_A_ (W)w);
		2723
		2724	EV_FREQUENT_CHECK;
		2725	}
		2726
		2727	#if EV_EMBED_ENABLE
		2728	void noinline
		2729	ev_embed_sweep (EV_P_ ev_embed *w)
		2730	{
		2731	ev_loop (w->other, EVLOOP_NONBLOCK);
342	}	2732	}
343		2733
344	static void	2734	static void
345	ev_stop (struct ev_watcher *w)	2735	embed_io_cb (EV_P_ ev_io *io, int revents)
346	{	2736	{
347	if (w->pending)	2737	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
348	pendings [w->pending - 1].w = 0;
349		2738
350	w->active = 0;
351	/* nop */
352	}
353
354	void
355	evio_start (struct ev_io *w)
356	{
357	if (ev_is_active (w))	2739	if (ev_cb (w))
		2740	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2741	else
		2742	ev_loop (w->other, EVLOOP_NONBLOCK);
		2743	}
		2744
		2745	static void
		2746	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2747	{
		2748	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2749
		2750	{
		2751	struct ev_loop *loop = w->other;
		2752
		2753	while (fdchangecnt)
		2754	{
		2755	fd_reify (EV_A);
		2756	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2757	}
		2758	}
		2759	}
		2760
		2761	#if 0
		2762	static void
		2763	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2764	{
		2765	ev_idle_stop (EV_A_ idle);
		2766	}
		2767	#endif
		2768
		2769	void
		2770	ev_embed_start (EV_P_ ev_embed *w)
		2771	{
		2772	if (expect_false (ev_is_active (w)))
358	return;	2773	return;
359		2774
360	int fd = w->fd;	2775	{
		2776	struct ev_loop *loop = w->other;
		2777	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2778	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2779	}
361		2780
362	ev_start ((struct ev_watcher *)w, 1);	2781	EV_FREQUENT_CHECK;
363	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
364	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
365		2782
366	++fdchangecnt;	2783	ev_set_priority (&w->io, ev_priority (w));
367	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	2784	ev_io_start (EV_A_ &w->io);
368	fdchanges [fdchangecnt - 1] = fd;
369	}
370		2785
		2786	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2787	ev_set_priority (&w->prepare, EV_MINPRI);
		2788	ev_prepare_start (EV_A_ &w->prepare);
		2789
		2790	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2791
		2792	ev_start (EV_A_ (W)w, 1);
		2793
		2794	EV_FREQUENT_CHECK;
		2795	}
		2796
371	void	2797	void
372	evio_stop (struct ev_io *w)	2798	ev_embed_stop (EV_P_ ev_embed *w)
373	{	2799	{
		2800	clear_pending (EV_A_ (W)w);
374	if (!ev_is_active (w))	2801	if (expect_false (!ev_is_active (w)))
375	return;	2802	return;
376		2803
377	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	2804	EV_FREQUENT_CHECK;
378	ev_stop ((struct ev_watcher *)w);
379		2805
380	++fdchangecnt;	2806	ev_io_stop (EV_A_ &w->io);
381	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	2807	ev_prepare_stop (EV_A_ &w->prepare);
382	fdchanges [fdchangecnt - 1] = w->fd;
383	}
384		2808
		2809	ev_stop (EV_A_ (W)w);
		2810
		2811	EV_FREQUENT_CHECK;
		2812	}
		2813	#endif
		2814
		2815	#if EV_FORK_ENABLE
385	void	2816	void
386	evtimer_start (struct ev_timer *w)	2817	ev_fork_start (EV_P_ ev_fork *w)
387	{	2818	{
388	if (ev_is_active (w))	2819	if (expect_false (ev_is_active (w)))
389	return;	2820	return;
390		2821
391	if (w->is_abs)	2822	EV_FREQUENT_CHECK;
392	{
393	/* this formula differs from the one in timer_reify becuse we do not round up */
394	if (w->repeat)
395	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
396	}
397	else
398	w->at += ev_now;
399		2823
400	ev_start ((struct ev_watcher *)w, ++timercnt);	2824	ev_start (EV_A_ (W)w, ++forkcnt);
401	array_needsize (timers, timermax, timercnt, );	2825	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
402	timers [timercnt - 1] = w;	2826	forks [forkcnt - 1] = w;
403	upheap (timercnt - 1);
404	}
405		2827
		2828	EV_FREQUENT_CHECK;
		2829	}
		2830
406	void	2831	void
407	evtimer_stop (struct ev_timer *w)	2832	ev_fork_stop (EV_P_ ev_fork *w)
408	{	2833	{
		2834	clear_pending (EV_A_ (W)w);
409	if (!ev_is_active (w))	2835	if (expect_false (!ev_is_active (w)))
410	return;	2836	return;
411		2837
412	if (w->active < timercnt--)	2838	EV_FREQUENT_CHECK;
		2839
413	{	2840	{
414	timers [w->active - 1] = timers [timercnt];	2841	int active = ev_active (w);
415	downheap (w->active - 1);	2842
		2843	forks [active - 1] = forks [--forkcnt];
		2844	ev_active (forks [active - 1]) = active;
416	}	2845	}
417		2846
418	ev_stop ((struct ev_watcher *)w);	2847	ev_stop (EV_A_ (W)w);
419	}
420		2848
		2849	EV_FREQUENT_CHECK;
		2850	}
		2851	#endif
		2852
		2853	#if EV_ASYNC_ENABLE
421	void	2854	void
422	evsignal_start (struct ev_signal *w)	2855	ev_async_start (EV_P_ ev_async *w)
423	{	2856	{
424	if (ev_is_active (w))	2857	if (expect_false (ev_is_active (w)))
425	return;	2858	return;
426		2859
427	ev_start ((struct ev_watcher *)w, 1);	2860	evpipe_init (EV_A);
428	array_needsize (signals, signalmax, w->signum, signals_init);
429	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
430	}
431		2861
		2862	EV_FREQUENT_CHECK;
		2863
		2864	ev_start (EV_A_ (W)w, ++asynccnt);
		2865	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2866	asyncs [asynccnt - 1] = w;
		2867
		2868	EV_FREQUENT_CHECK;
		2869	}
		2870
432	void	2871	void
433	evsignal_stop (struct ev_signal *w)	2872	ev_async_stop (EV_P_ ev_async *w)
434	{	2873	{
		2874	clear_pending (EV_A_ (W)w);
435	if (!ev_is_active (w))	2875	if (expect_false (!ev_is_active (w)))
436	return;	2876	return;
437		2877
438	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2878	EV_FREQUENT_CHECK;
439	ev_stop ((struct ev_watcher *)w);	2879
		2880	{
		2881	int active = ev_active (w);
		2882
		2883	asyncs [active - 1] = asyncs [--asynccnt];
		2884	ev_active (asyncs [active - 1]) = active;
		2885	}
		2886
		2887	ev_stop (EV_A_ (W)w);
		2888
		2889	EV_FREQUENT_CHECK;
440	}	2890	}
		2891
		2892	void
		2893	ev_async_send (EV_P_ ev_async *w)
		2894	{
		2895	w->sent = 1;
		2896	evpipe_write (EV_A_ &gotasync);
		2897	}
		2898	#endif
441		2899
442	/*****************************************************************************/	2900	/*****************************************************************************/
443	#if 1	2901
		2902	struct ev_once
		2903	{
		2904	ev_io io;
		2905	ev_timer to;
		2906	void (*cb)(int revents, void *arg);
		2907	void *arg;
		2908	};
444		2909
445	static void	2910	static void
446	sin_cb (struct ev_io *w, int revents)	2911	once_cb (EV_P_ struct ev_once *once, int revents)
447	{	2912	{
448	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2913	void (*cb)(int revents, void *arg) = once->cb;
		2914	void *arg = once->arg;
		2915
		2916	ev_io_stop (EV_A_ &once->io);
		2917	ev_timer_stop (EV_A_ &once->to);
		2918	ev_free (once);
		2919
		2920	cb (revents, arg);
449	}	2921	}
450		2922
451	static void	2923	static void
		2924	once_cb_io (EV_P_ ev_io *w, int revents)
		2925	{
		2926	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2927	}
		2928
		2929	static void
452	ocb (struct ev_timer *w, int revents)	2930	once_cb_to (EV_P_ ev_timer *w, int revents)
453	{	2931	{
454	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2932	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
455	}	2933	}
456		2934
457	int main (void)	2935	void
		2936	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
458	{	2937	{
459	struct ev_io sin;	2938	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
460		2939
461	ev_init (0);	2940	if (expect_false (!once))
462
463	evw_init (&sin, sin_cb, 55);
464	evio_set (&sin, 0, EV_READ);
465	evio_start (&sin);
466
467	struct ev_timer t[1000];
468
469	int i;
470	for (i = 0; i < 1000; ++i)
471	{
472	struct ev_timer *w = t + i;
473	evw_init (w, ocb, i);
474	evtimer_set_rel (w, drand48 (), 0);
475	evtimer_start (w);
476	if (drand48 () < 0.5)
477	evtimer_stop (w);
478	}	2941	{
479		2942	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
480	ev_loop (0);
481
482	return 0;	2943	return;
483	}	2944	}
484		2945
485	#endif	2946	once->cb = cb;
		2947	once->arg = arg;
486		2948
		2949	ev_init (&once->io, once_cb_io);
		2950	if (fd >= 0)
		2951	{
		2952	ev_io_set (&once->io, fd, events);
		2953	ev_io_start (EV_A_ &once->io);
		2954	}
487		2955
		2956	ev_init (&once->to, once_cb_to);
		2957	if (timeout >= 0.)
		2958	{
		2959	ev_timer_set (&once->to, timeout, 0.);
		2960	ev_timer_start (EV_A_ &once->to);
		2961	}
		2962	}
488		2963
		2964	#if EV_MULTIPLICITY
		2965	#include "ev_wrap.h"
		2966	#endif
489		2967
		2968	#ifdef __cplusplus
		2969	}
		2970	#endif
		2971

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