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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 1.241 by root, Fri May 9 13:57:00 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	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		241
10	#ifdef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
		243	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	244	# define EV_USE_MONOTONIC 0
		245	#endif
		246
		247	#ifndef CLOCK_REALTIME
		248	# undef EV_USE_REALTIME
		249	# define EV_USE_REALTIME 0
		250	#endif
		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
12	#endif	260	# endif
		261	#endif
13		262
14	#define HAVE_EPOLL 1	263	#if EV_USE_INOTIFY
15	#define HAVE_REALTIME 1	264	# include <sys/inotify.h>
16	#define HAVE_SELECT 0	265	#endif
17		266
18	#define MAX_BLOCKTIME 60.	267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
19		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 */
		294
		295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		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 */
		298
		299	#if __GNUC__ >= 4
		300	# define expect(expr,value) __builtin_expect ((expr),(value))
		301	# define noinline __attribute__ ((noinline))
		302	#else
		303	# define expect(expr,value) (expr)
		304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
		308	#endif
		309
		310	#define expect_false(expr) expect ((expr) != 0, 0)
		311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
		319
		320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
		326	typedef ev_watcher *W;
		327	typedef ev_watcher_list *WL;
		328	typedef ev_watcher_time *WT;
		329
		330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
		336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
		338
		339	#ifdef _WIN32
		340	# include "ev_win32.c"
		341	#endif
		342
		343	/*****************************************************************************/
		344
		345	static void (*syserr_cb)(const char *msg);
		346
		347	void
		348	ev_set_syserr_cb (void (*cb)(const char *msg))
		349	{
		350	syserr_cb = cb;
		351	}
		352
		353	static void noinline
		354	syserr (const char *msg)
		355	{
		356	if (!msg)
		357	msg = "(libev) system error";
		358
		359	if (syserr_cb)
		360	syserr_cb (msg);
		361	else
		362	{
		363	perror (msg);
		364	abort ();
		365	}
		366	}
		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
		383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		384
		385	void
		386	ev_set_allocator (void *(*cb)(void *ptr, long size))
		387	{
		388	alloc = cb;
		389	}
		390
		391	inline_speed void *
		392	ev_realloc (void *ptr, long size)
		393	{
		394	ptr = alloc (ptr, size);
		395
		396	if (!ptr && size)
		397	{
		398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		399	abort ();
		400	}
		401
		402	return ptr;
		403	}
		404
		405	#define ev_malloc(size) ev_realloc (0, (size))
		406	#define ev_free(ptr) ev_realloc ((ptr), 0)
		407
		408	/*****************************************************************************/
		409
		410	typedef struct
		411	{
		412	WL head;
		413	unsigned char events;
		414	unsigned char reify;
		415	#if EV_SELECT_IS_WINSOCKET
		416	SOCKET handle;
		417	#endif
		418	} ANFD;
		419
		420	typedef struct
		421	{
		422	W w;
		423	int events;
		424	} ANPENDING;
		425
		426	#if EV_USE_INOTIFY
		427	/* hash table entry per inotify-id */
		428	typedef struct
		429	{
		430	WL head;
		431	} ANFS;
		432	#endif
		433
		434	/* Heap Entry */
		435	#if EV_HEAP_CACHE_AT
		436	typedef struct {
		437	WT w;
		438	ev_tstamp at;
		439	} ANHE;
		440
		441	#define ANHE_w(he) (he) /* access watcher, read-write */
		442	#define ANHE_at(he) (he)->at /* acces cahced at, read-only */
		443	#define ANHE_at_set(he) (he)->at = (he)->w->at /* update at from watcher */
		444	#else
		445	typedef WT ANHE;
		446
		447	#define ANHE_w(he) (he)
		448	#define ANHE_at(he) (he)->at
		449	#define ANHE_at_set(he)
		450	#endif
		451
		452	#if EV_MULTIPLICITY
		453
		454	struct ev_loop
		455	{
		456	ev_tstamp ev_rt_now;
		457	#define ev_rt_now ((loop)->ev_rt_now)
		458	#define VAR(name,decl) decl;
		459	#include "ev_vars.h"
		460	#undef VAR
		461	};
20	#include "ev.h"	462	#include "ev_wrap.h"
21		463
22	struct ev_watcher {	464	static struct ev_loop default_loop_struct;
23	EV_WATCHER (ev_watcher);	465	struct ev_loop *ev_default_loop_ptr;
24	};
25		466
26	struct ev_watcher_list {	467	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		468
30	ev_tstamp ev_now;	469	ev_tstamp ev_rt_now;
31	int ev_method;	470	#define VAR(name,decl) static decl;
		471	#include "ev_vars.h"
		472	#undef VAR
32		473
33	static int have_monotonic; /* runtime */	474	static int ev_default_loop_ptr;
34		475
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	476	#endif
36	static void (*method_reify)(void);	477
37	static void (*method_poll)(ev_tstamp timeout);	478	/*****************************************************************************/
38		479
39	ev_tstamp	480	ev_tstamp
40	ev_time (void)	481	ev_time (void)
41	{	482	{
42	#if HAVE_REALTIME	483	#if EV_USE_REALTIME
43	struct timespec ts;	484	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	485	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	486	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	487	#else
47	struct timeval tv;	488	struct timeval tv;
48	gettimeofday (&tv, 0);	489	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	490	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	491	#endif
51	}	492	}
52		493
53	static ev_tstamp	494	ev_tstamp inline_size
54	get_clock (void)	495	get_clock (void)
55	{	496	{
56	#if HAVE_MONOTONIC	497	#if EV_USE_MONOTONIC
57	if (have_monotonic)	498	if (expect_true (have_monotonic))
58	{	499	{
59	struct timespec ts;	500	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	501	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	502	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	503	}
63	#endif	504	#endif
64		505
65	return ev_time ();	506	return ev_time ();
66	}	507	}
67		508
		509	#if EV_MULTIPLICITY
		510	ev_tstamp
		511	ev_now (EV_P)
		512	{
		513	return ev_rt_now;
		514	}
		515	#endif
		516
		517	void
		518	ev_sleep (ev_tstamp delay)
		519	{
		520	if (delay > 0.)
		521	{
		522	#if EV_USE_NANOSLEEP
		523	struct timespec ts;
		524
		525	ts.tv_sec = (time_t)delay;
		526	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		527
		528	nanosleep (&ts, 0);
		529	#elif defined(_WIN32)
		530	Sleep ((unsigned long)(delay * 1e3));
		531	#else
		532	struct timeval tv;
		533
		534	tv.tv_sec = (time_t)delay;
		535	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		536
		537	select (0, 0, 0, 0, &tv);
		538	#endif
		539	}
		540	}
		541
		542	/*****************************************************************************/
		543
		544	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		545
		546	int inline_size
		547	array_nextsize (int elem, int cur, int cnt)
		548	{
		549	int ncur = cur + 1;
		550
		551	do
		552	ncur <<= 1;
		553	while (cnt > ncur);
		554
		555	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		556	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		557	{
		558	ncur *= elem;
		559	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		560	ncur = ncur - sizeof (void *) * 4;
		561	ncur /= elem;
		562	}
		563
		564	return ncur;
		565	}
		566
		567	static noinline void *
		568	array_realloc (int elem, void *base, int *cur, int cnt)
		569	{
		570	*cur = array_nextsize (elem, *cur, cnt);
		571	return ev_realloc (base, elem * *cur);
		572	}
		573
68	#define array_needsize(base,cur,cnt,init) \	574	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	575	if (expect_false ((cnt) > (cur))) \
70	{ \	576	{ \
71	int newcnt = cur ? cur << 1 : 16; \	577	int ocur_ = (cur); \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	578	(base) = (type *)array_realloc \
73	base = realloc (base, sizeof (*base) * (newcnt)); \	579	(sizeof (type), (base), &(cur), (cnt)); \
74	init (base + cur, newcnt - cur); \	580	init ((base) + (ocur_), (cur) - ocur_); \
75	cur = newcnt; \	581	}
		582
		583	#if 0
		584	#define array_slim(type,stem) \
		585	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		586	{ \
		587	stem ## max = array_roundsize (stem ## cnt >> 1); \
		588	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		589	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		590	}
		591	#endif
		592
		593	#define array_free(stem, idx) \
		594	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		595
		596	/*****************************************************************************/
		597
		598	void noinline
		599	ev_feed_event (EV_P_ void *w, int revents)
		600	{
		601	W w_ = (W)w;
		602	int pri = ABSPRI (w_);
		603
		604	if (expect_false (w_->pending))
		605	pendings [pri][w_->pending - 1].events |= revents;
		606	else
		607	{
		608	w_->pending = ++pendingcnt [pri];
		609	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		610	pendings [pri][w_->pending - 1].w = w_;
		611	pendings [pri][w_->pending - 1].events = revents;
		612	}
		613	}
		614
		615	void inline_speed
		616	queue_events (EV_P_ W *events, int eventcnt, int type)
		617	{
		618	int i;
		619
		620	for (i = 0; i < eventcnt; ++i)
		621	ev_feed_event (EV_A_ events [i], type);
		622	}
		623
		624	/*****************************************************************************/
		625
		626	void inline_size
		627	anfds_init (ANFD *base, int count)
		628	{
		629	while (count--)
		630	{
		631	base->head = 0;
		632	base->events = EV_NONE;
		633	base->reify = 0;
		634
		635	++base;
		636	}
		637	}
		638
		639	void inline_speed
		640	fd_event (EV_P_ int fd, int revents)
		641	{
		642	ANFD *anfd = anfds + fd;
		643	ev_io *w;
		644
		645	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		646	{
		647	int ev = w->events & revents;
		648
		649	if (ev)
		650	ev_feed_event (EV_A_ (W)w, ev);
		651	}
		652	}
		653
		654	void
		655	ev_feed_fd_event (EV_P_ int fd, int revents)
		656	{
		657	if (fd >= 0 && fd < anfdmax)
		658	fd_event (EV_A_ fd, revents);
		659	}
		660
		661	void inline_size
		662	fd_reify (EV_P)
		663	{
		664	int i;
		665
		666	for (i = 0; i < fdchangecnt; ++i)
		667	{
		668	int fd = fdchanges [i];
		669	ANFD *anfd = anfds + fd;
		670	ev_io *w;
		671
		672	unsigned char events = 0;
		673
		674	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		675	events |= (unsigned char)w->events;
		676
		677	#if EV_SELECT_IS_WINSOCKET
		678	if (events)
		679	{
		680	unsigned long argp;
		681	#ifdef EV_FD_TO_WIN32_HANDLE
		682	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		683	#else
		684	anfd->handle = _get_osfhandle (fd);
		685	#endif
		686	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		687	}
		688	#endif
		689
		690	{
		691	unsigned char o_events = anfd->events;
		692	unsigned char o_reify = anfd->reify;
		693
		694	anfd->reify = 0;
		695	anfd->events = events;
		696
		697	if (o_events != events || o_reify & EV_IOFDSET)
		698	backend_modify (EV_A_ fd, o_events, events);
76	}	699	}
		700	}
		701
		702	fdchangecnt = 0;
		703	}
		704
		705	void inline_size
		706	fd_change (EV_P_ int fd, int flags)
		707	{
		708	unsigned char reify = anfds [fd].reify;
		709	anfds [fd].reify |= flags;
		710
		711	if (expect_true (!reify))
		712	{
		713	++fdchangecnt;
		714	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		715	fdchanges [fdchangecnt - 1] = fd;
		716	}
		717	}
		718
		719	void inline_speed
		720	fd_kill (EV_P_ int fd)
		721	{
		722	ev_io *w;
		723
		724	while ((w = (ev_io *)anfds [fd].head))
		725	{
		726	ev_io_stop (EV_A_ w);
		727	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		728	}
		729	}
		730
		731	int inline_size
		732	fd_valid (int fd)
		733	{
		734	#ifdef _WIN32
		735	return _get_osfhandle (fd) != -1;
		736	#else
		737	return fcntl (fd, F_GETFD) != -1;
		738	#endif
		739	}
		740
		741	/* called on EBADF to verify fds */
		742	static void noinline
		743	fd_ebadf (EV_P)
		744	{
		745	int fd;
		746
		747	for (fd = 0; fd < anfdmax; ++fd)
		748	if (anfds [fd].events)
		749	if (!fd_valid (fd) == -1 && errno == EBADF)
		750	fd_kill (EV_A_ fd);
		751	}
		752
		753	/* called on ENOMEM in select/poll to kill some fds and retry */
		754	static void noinline
		755	fd_enomem (EV_P)
		756	{
		757	int fd;
		758
		759	for (fd = anfdmax; fd--; )
		760	if (anfds [fd].events)
		761	{
		762	fd_kill (EV_A_ fd);
		763	return;
		764	}
		765	}
		766
		767	/* usually called after fork if backend needs to re-arm all fds from scratch */
		768	static void noinline
		769	fd_rearm_all (EV_P)
		770	{
		771	int fd;
		772
		773	for (fd = 0; fd < anfdmax; ++fd)
		774	if (anfds [fd].events)
		775	{
		776	anfds [fd].events = 0;
		777	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		778	}
		779	}
		780
		781	/*****************************************************************************/
		782
		783	/*
		784	* the heap functions want a real array index. array index 0 uis guaranteed to not
		785	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		786	* the branching factor of the d-tree.
		787	*/
		788
		789	/*
		790	* at the moment we allow libev the luxury of two heaps,
		791	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		792	* which is more cache-efficient.
		793	* the difference is about 5% with 50000+ watchers.
		794	*/
		795	#define EV_USE_4HEAP !EV_MINIMAL
		796	#if EV_USE_4HEAP
		797
		798	#define DHEAP 4
		799	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		800
		801	/* towards the root */
		802	void inline_speed
		803	upheap (ANHE *heap, int k)
		804	{
		805	ANHE he = heap [k];
		806
		807	for (;;)
		808	{
		809	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
		810
		811	if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
		812	break;
		813
		814	heap [k] = heap [p];
		815	ev_active (ANHE_w (heap [k])) = k;
		816	k = p;
		817	}
		818
		819	ev_active (ANHE_w (he)) = k;
		820	heap [k] = he;
		821	}
		822
		823	/* away from the root */
		824	void inline_speed
		825	downheap (ANHE *heap, int N, int k)
		826	{
		827	ANHE he = heap [k];
		828	ANHE *E = heap + N + HEAP0;
		829
		830	for (;;)
		831	{
		832	ev_tstamp minat;
		833	ANHE *minpos;
		834	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
		835
		836	// find minimum child
		837	if (expect_true (pos + DHEAP - 1 < E))
		838	{
		839	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		840	if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		841	if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		842	if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		843	}
		844	else if (pos < E)
		845	{
		846	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		847	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		848	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		849	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		850	}
		851	else
		852	break;
		853
		854	if (ANHE_at (he) <= minat)
		855	break;
		856
		857	ev_active (ANHE_w (*minpos)) = k;
		858	heap [k] = *minpos;
		859
		860	k = minpos - heap;
		861	}
		862
		863	ev_active (ANHE_w (he)) = k;
		864	heap [k] = he;
		865	}
		866
		867	#else // 4HEAP
		868
		869	#define HEAP0 1
		870
		871	/* towards the root */
		872	void inline_speed
		873	upheap (ANHE *heap, int k)
		874	{
		875	ANHE he = heap [k];
		876
		877	for (;;)
		878	{
		879	int p = k >> 1;
		880
		881	/* maybe we could use a dummy element at heap [0]? */
		882	if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
		883	break;
		884
		885	heap [k] = heap [p];
		886	ev_active (ANHE_w (heap [k])) = k;
		887	k = p;
		888	}
		889
		890	heap [k] = w;
		891	ev_active (ANHE_w (heap [k])) = k;
		892	}
		893
		894	/* away from the root */
		895	void inline_speed
		896	downheap (ANHE *heap, int N, int k)
		897	{
		898	ANHE he = heap [k];
		899
		900	for (;;)
		901	{
		902	int c = k << 1;
		903
		904	if (c > N)
		905	break;
		906
		907	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		908	? 1 : 0;
		909
		910	if (w->at <= ANHE_at (heap [c]))
		911	break;
		912
		913	heap [k] = heap [c];
		914	ev_active (ANHE_w (heap [k])) = k;
		915
		916	k = c;
		917	}
		918
		919	heap [k] = he;
		920	ev_active (ANHE_w (he)) = k;
		921	}
		922	#endif
		923
		924	void inline_size
		925	adjustheap (ANHE *heap, int N, int k)
		926	{
		927	upheap (heap, k);
		928	downheap (heap, N, k);
		929	}
		930
		931	/*****************************************************************************/
77		932
78	typedef struct	933	typedef struct
79	{	934	{
80	struct ev_io *head;	935	WL head;
81	unsigned char wev, rev; /* want, received event set */	936	EV_ATOMIC_T gotsig;
82	} ANFD;	937	} ANSIG;
83		938
84	static ANFD *anfds;	939	static ANSIG *signals;
85	static int anfdmax;	940	static int signalmax;
86		941
87	static int *fdchanges;	942	static EV_ATOMIC_T gotsig;
88	static int fdchangemax, fdchangecnt;	943
		944	void inline_size
		945	signals_init (ANSIG *base, int count)
		946	{
		947	while (count--)
		948	{
		949	base->head = 0;
		950	base->gotsig = 0;
		951
		952	++base;
		953	}
		954	}
		955
		956	/*****************************************************************************/
		957
		958	void inline_speed
		959	fd_intern (int fd)
		960	{
		961	#ifdef _WIN32
		962	int arg = 1;
		963	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		964	#else
		965	fcntl (fd, F_SETFD, FD_CLOEXEC);
		966	fcntl (fd, F_SETFL, O_NONBLOCK);
		967	#endif
		968	}
		969
		970	static void noinline
		971	evpipe_init (EV_P)
		972	{
		973	if (!ev_is_active (&pipeev))
		974	{
		975	#if EV_USE_EVENTFD
		976	if ((evfd = eventfd (0, 0)) >= 0)
		977	{
		978	evpipe [0] = -1;
		979	fd_intern (evfd);
		980	ev_io_set (&pipeev, evfd, EV_READ);
		981	}
		982	else
		983	#endif
		984	{
		985	while (pipe (evpipe))
		986	syserr ("(libev) error creating signal/async pipe");
		987
		988	fd_intern (evpipe [0]);
		989	fd_intern (evpipe [1]);
		990	ev_io_set (&pipeev, evpipe [0], EV_READ);
		991	}
		992
		993	ev_io_start (EV_A_ &pipeev);
		994	ev_unref (EV_A); /* watcher should not keep loop alive */
		995	}
		996	}
		997
		998	void inline_size
		999	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1000	{
		1001	if (!*flag)
		1002	{
		1003	int old_errno = errno; /* save errno because write might clobber it */
		1004
		1005	*flag = 1;
		1006
		1007	#if EV_USE_EVENTFD
		1008	if (evfd >= 0)
		1009	{
		1010	uint64_t counter = 1;
		1011	write (evfd, &counter, sizeof (uint64_t));
		1012	}
		1013	else
		1014	#endif
		1015	write (evpipe [1], &old_errno, 1);
		1016
		1017	errno = old_errno;
		1018	}
		1019	}
89		1020
90	static void	1021	static void
91	anfds_init (ANFD *base, int count)	1022	pipecb (EV_P_ ev_io *iow, int revents)
92	{	1023	{
93	while (count--)	1024	#if EV_USE_EVENTFD
94	{	1025	if (evfd >= 0)
95	base->head = 0;
96	base->wev = base->rev = EV_NONE;
97	++base;
98	}	1026	{
99	}	1027	uint64_t counter;
		1028	read (evfd, &counter, sizeof (uint64_t));
		1029	}
		1030	else
		1031	#endif
		1032	{
		1033	char dummy;
		1034	read (evpipe [0], &dummy, 1);
		1035	}
100		1036
101	typedef struct	1037	if (gotsig && ev_is_default_loop (EV_A))
102	{	1038	{
103	struct ev_watcher *w;	1039	int signum;
104	int events;	1040	gotsig = 0;
105	} ANPENDING;
106		1041
107	static ANPENDING *pendings;	1042	for (signum = signalmax; signum--; )
108	static int pendingmax, pendingcnt;	1043	if (signals [signum].gotsig)
		1044	ev_feed_signal_event (EV_A_ signum + 1);
		1045	}
		1046
		1047	#if EV_ASYNC_ENABLE
		1048	if (gotasync)
		1049	{
		1050	int i;
		1051	gotasync = 0;
		1052
		1053	for (i = asynccnt; i--; )
		1054	if (asyncs [i]->sent)
		1055	{
		1056	asyncs [i]->sent = 0;
		1057	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1058	}
		1059	}
		1060	#endif
		1061	}
		1062
		1063	/*****************************************************************************/
109		1064
110	static void	1065	static void
111	event (struct ev_watcher *w, int events)	1066	ev_sighandler (int signum)
112	{	1067	{
113	w->pending = ++pendingcnt;	1068	#if EV_MULTIPLICITY
114	array_needsize (pendings, pendingmax, pendingcnt, );	1069	struct ev_loop *loop = &default_loop_struct;
115	pendings [pendingcnt - 1].w = w;	1070	#endif
116	pendings [pendingcnt - 1].events = events;	1071
		1072	#if _WIN32
		1073	signal (signum, ev_sighandler);
		1074	#endif
		1075
		1076	signals [signum - 1].gotsig = 1;
		1077	evpipe_write (EV_A_ &gotsig);
117	}	1078	}
		1079
		1080	void noinline
		1081	ev_feed_signal_event (EV_P_ int signum)
		1082	{
		1083	WL w;
		1084
		1085	#if EV_MULTIPLICITY
		1086	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1087	#endif
		1088
		1089	--signum;
		1090
		1091	if (signum < 0 || signum >= signalmax)
		1092	return;
		1093
		1094	signals [signum].gotsig = 0;
		1095
		1096	for (w = signals [signum].head; w; w = w->next)
		1097	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1098	}
		1099
		1100	/*****************************************************************************/
		1101
		1102	static WL childs [EV_PID_HASHSIZE];
		1103
		1104	#ifndef _WIN32
		1105
		1106	static ev_signal childev;
		1107
		1108	#ifndef WIFCONTINUED
		1109	# define WIFCONTINUED(status) 0
		1110	#endif
		1111
		1112	void inline_speed
		1113	child_reap (EV_P_ int chain, int pid, int status)
		1114	{
		1115	ev_child *w;
		1116	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1117
		1118	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1119	{
		1120	if ((w->pid == pid || !w->pid)
		1121	&& (!traced || (w->flags & 1)))
		1122	{
		1123	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1124	w->rpid = pid;
		1125	w->rstatus = status;
		1126	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1127	}
		1128	}
		1129	}
		1130
		1131	#ifndef WCONTINUED
		1132	# define WCONTINUED 0
		1133	#endif
118		1134
119	static void	1135	static void
120	fd_event (int fd, int events)	1136	childcb (EV_P_ ev_signal *sw, int revents)
121	{	1137	{
122	ANFD *anfd = anfds + fd;	1138	int pid, status;
123	struct ev_io *w;
124		1139
125	for (w = anfd->head; w; w = w->next)	1140	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
126	{	1141	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
127	int ev = w->events & events;	1142	if (!WCONTINUED
		1143	|| errno != EINVAL
		1144	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1145	return;
128		1146
129	if (ev)	1147	/* make sure we are called again until all children have been reaped */
130	event ((struct ev_watcher *)w, ev);	1148	/* we need to do it this way so that the callback gets called before we continue */
131	}	1149	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
132	}
133		1150
134	static struct ev_timer **timers;	1151	child_reap (EV_A_ pid, pid, status);
135	static int timermax, timercnt;	1152	if (EV_PID_HASHSIZE > 1)
136		1153	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
137	static void
138	upheap (int k)
139	{
140	struct ev_timer *w = timers [k];
141
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	}	1154	}
153		1155
154	static void	1156	#endif
155	downheap (int k)
156	{
157	struct ev_timer *w = timers [k];
158		1157
159	while (k < (timercnt >> 1))	1158	/*****************************************************************************/
160	{
161	int j = k << 1;
162		1159
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	1160	#if EV_USE_PORT
164	++j;	1161	# include "ev_port.c"
165		1162	#endif
166	if (w->at <= timers [j]->at)	1163	#if EV_USE_KQUEUE
167	break;	1164	# include "ev_kqueue.c"
168		1165	#endif
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	1166	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	1167	# include "ev_epoll.c"
190	#endif	1168	#endif
		1169	#if EV_USE_POLL
		1170	# include "ev_poll.c"
		1171	#endif
191	#if HAVE_SELECT	1172	#if EV_USE_SELECT
192	# include "ev_select.c"	1173	# include "ev_select.c"
193	#endif	1174	#endif
194		1175
195	int ev_init (int flags)	1176	int
		1177	ev_version_major (void)
196	{	1178	{
		1179	return EV_VERSION_MAJOR;
		1180	}
		1181
		1182	int
		1183	ev_version_minor (void)
		1184	{
		1185	return EV_VERSION_MINOR;
		1186	}
		1187
		1188	/* return true if we are running with elevated privileges and should ignore env variables */
		1189	int inline_size
		1190	enable_secure (void)
		1191	{
		1192	#ifdef _WIN32
		1193	return 0;
		1194	#else
		1195	return getuid () != geteuid ()
		1196	|| getgid () != getegid ();
		1197	#endif
		1198	}
		1199
		1200	unsigned int
		1201	ev_supported_backends (void)
		1202	{
		1203	unsigned int flags = 0;
		1204
		1205	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1206	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1207	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1208	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1209	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1210
		1211	return flags;
		1212	}
		1213
		1214	unsigned int
		1215	ev_recommended_backends (void)
		1216	{
		1217	unsigned int flags = ev_supported_backends ();
		1218
		1219	#ifndef __NetBSD__
		1220	/* kqueue is borked on everything but netbsd apparently */
		1221	/* it usually doesn't work correctly on anything but sockets and pipes */
		1222	flags &= ~EVBACKEND_KQUEUE;
		1223	#endif
		1224	#ifdef __APPLE__
		1225	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1226	flags &= ~EVBACKEND_POLL;
		1227	#endif
		1228
		1229	return flags;
		1230	}
		1231
		1232	unsigned int
		1233	ev_embeddable_backends (void)
		1234	{
		1235	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1236
		1237	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1238	/* please fix it and tell me how to detect the fix */
		1239	flags &= ~EVBACKEND_EPOLL;
		1240
		1241	return flags;
		1242	}
		1243
		1244	unsigned int
		1245	ev_backend (EV_P)
		1246	{
		1247	return backend;
		1248	}
		1249
		1250	unsigned int
		1251	ev_loop_count (EV_P)
		1252	{
		1253	return loop_count;
		1254	}
		1255
		1256	void
		1257	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1258	{
		1259	io_blocktime = interval;
		1260	}
		1261
		1262	void
		1263	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1264	{
		1265	timeout_blocktime = interval;
		1266	}
		1267
		1268	static void noinline
		1269	loop_init (EV_P_ unsigned int flags)
		1270	{
		1271	if (!backend)
		1272	{
197	#if HAVE_MONOTONIC	1273	#if EV_USE_MONOTONIC
198	{	1274	{
199	struct timespec ts;	1275	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1276	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	1277	have_monotonic = 1;
202	}	1278	}
203	#endif	1279	#endif
204		1280
205	ev_now = ev_time ();	1281	ev_rt_now = ev_time ();
		1282	mn_now = get_clock ();
		1283	now_floor = mn_now;
		1284	rtmn_diff = ev_rt_now - mn_now;
206		1285
		1286	io_blocktime = 0.;
		1287	timeout_blocktime = 0.;
		1288	backend = 0;
		1289	backend_fd = -1;
		1290	gotasync = 0;
		1291	#if EV_USE_INOTIFY
		1292	fs_fd = -2;
		1293	#endif
		1294
		1295	/* pid check not overridable via env */
		1296	#ifndef _WIN32
		1297	if (flags & EVFLAG_FORKCHECK)
		1298	curpid = getpid ();
		1299	#endif
		1300
		1301	if (!(flags & EVFLAG_NOENV)
		1302	&& !enable_secure ()
		1303	&& getenv ("LIBEV_FLAGS"))
		1304	flags = atoi (getenv ("LIBEV_FLAGS"));
		1305
		1306	if (!(flags & 0x0000ffffU))
		1307	flags |= ev_recommended_backends ();
		1308
		1309	#if EV_USE_PORT
		1310	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1311	#endif
		1312	#if EV_USE_KQUEUE
		1313	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1314	#endif
207	#if HAVE_EPOLL	1315	#if EV_USE_EPOLL
208	if (epoll_init (flags))	1316	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
209	return ev_method;
210	#endif	1317	#endif
		1318	#if EV_USE_POLL
		1319	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1320	#endif
211	#if HAVE_SELECT	1321	#if EV_USE_SELECT
212	if (select_init (flags))	1322	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
213	return ev_method;
214	#endif	1323	#endif
215		1324
216	ev_method = EVMETHOD_NONE;	1325	ev_init (&pipeev, pipecb);
217	return ev_method;	1326	ev_set_priority (&pipeev, EV_MAXPRI);
		1327	}
218	}	1328	}
219		1329
220	void ev_prefork (void)	1330	static void noinline
221	{	1331	loop_destroy (EV_P)
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	{	1332	{
238	int i;	1333	int i;
239		1334
240	for (i = 0; i < pendingcnt; ++i)	1335	if (ev_is_active (&pipeev))
241	{	1336	{
242	ANPENDING *p = pendings + i;	1337	ev_ref (EV_A); /* signal watcher */
		1338	ev_io_stop (EV_A_ &pipeev);
243		1339
244	if (p->w)	1340	#if EV_USE_EVENTFD
		1341	if (evfd >= 0)
		1342	close (evfd);
		1343	#endif
		1344
		1345	if (evpipe [0] >= 0)
245	{	1346	{
246	p->w->pending = 0;	1347	close (evpipe [0]);
247	p->w->cb (p->w, p->events);	1348	close (evpipe [1]);
248	}	1349	}
249	}	1350	}
250		1351
251	pendingcnt = 0;	1352	#if EV_USE_INOTIFY
252	}	1353	if (fs_fd >= 0)
		1354	close (fs_fd);
		1355	#endif
253		1356
254	static void	1357	if (backend_fd >= 0)
255	timer_reify (void)	1358	close (backend_fd);
		1359
		1360	#if EV_USE_PORT
		1361	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1362	#endif
		1363	#if EV_USE_KQUEUE
		1364	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1365	#endif
		1366	#if EV_USE_EPOLL
		1367	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1368	#endif
		1369	#if EV_USE_POLL
		1370	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1371	#endif
		1372	#if EV_USE_SELECT
		1373	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1374	#endif
		1375
		1376	for (i = NUMPRI; i--; )
		1377	{
		1378	array_free (pending, [i]);
		1379	#if EV_IDLE_ENABLE
		1380	array_free (idle, [i]);
		1381	#endif
		1382	}
		1383
		1384	ev_free (anfds); anfdmax = 0;
		1385
		1386	/* have to use the microsoft-never-gets-it-right macro */
		1387	array_free (fdchange, EMPTY);
		1388	array_free (timer, EMPTY);
		1389	#if EV_PERIODIC_ENABLE
		1390	array_free (periodic, EMPTY);
		1391	#endif
		1392	#if EV_FORK_ENABLE
		1393	array_free (fork, EMPTY);
		1394	#endif
		1395	array_free (prepare, EMPTY);
		1396	array_free (check, EMPTY);
		1397	#if EV_ASYNC_ENABLE
		1398	array_free (async, EMPTY);
		1399	#endif
		1400
		1401	backend = 0;
		1402	}
		1403
		1404	#if EV_USE_INOTIFY
		1405	void inline_size infy_fork (EV_P);
		1406	#endif
		1407
		1408	void inline_size
		1409	loop_fork (EV_P)
256	{	1410	{
257	while (timercnt && timers [0]->at <= ev_now)	1411	#if EV_USE_PORT
		1412	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1413	#endif
		1414	#if EV_USE_KQUEUE
		1415	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1416	#endif
		1417	#if EV_USE_EPOLL
		1418	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1419	#endif
		1420	#if EV_USE_INOTIFY
		1421	infy_fork (EV_A);
		1422	#endif
		1423
		1424	if (ev_is_active (&pipeev))
		1425	{
		1426	/* this "locks" the handlers against writing to the pipe */
		1427	/* while we modify the fd vars */
		1428	gotsig = 1;
		1429	#if EV_ASYNC_ENABLE
		1430	gotasync = 1;
		1431	#endif
		1432
		1433	ev_ref (EV_A);
		1434	ev_io_stop (EV_A_ &pipeev);
		1435
		1436	#if EV_USE_EVENTFD
		1437	if (evfd >= 0)
		1438	close (evfd);
		1439	#endif
		1440
		1441	if (evpipe [0] >= 0)
		1442	{
		1443	close (evpipe [0]);
		1444	close (evpipe [1]);
		1445	}
		1446
		1447	evpipe_init (EV_A);
		1448	/* now iterate over everything, in case we missed something */
		1449	pipecb (EV_A_ &pipeev, EV_READ);
		1450	}
		1451
		1452	postfork = 0;
		1453	}
		1454
		1455	#if EV_MULTIPLICITY
		1456	struct ev_loop *
		1457	ev_loop_new (unsigned int flags)
		1458	{
		1459	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1460
		1461	memset (loop, 0, sizeof (struct ev_loop));
		1462
		1463	loop_init (EV_A_ flags);
		1464
		1465	if (ev_backend (EV_A))
		1466	return loop;
		1467
		1468	return 0;
		1469	}
		1470
		1471	void
		1472	ev_loop_destroy (EV_P)
		1473	{
		1474	loop_destroy (EV_A);
		1475	ev_free (loop);
		1476	}
		1477
		1478	void
		1479	ev_loop_fork (EV_P)
		1480	{
		1481	postfork = 1; /* must be in line with ev_default_fork */
		1482	}
		1483	#endif
		1484
		1485	#if EV_MULTIPLICITY
		1486	struct ev_loop *
		1487	ev_default_loop_init (unsigned int flags)
		1488	#else
		1489	int
		1490	ev_default_loop (unsigned int flags)
		1491	#endif
		1492	{
		1493	if (!ev_default_loop_ptr)
		1494	{
		1495	#if EV_MULTIPLICITY
		1496	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1497	#else
		1498	ev_default_loop_ptr = 1;
		1499	#endif
		1500
		1501	loop_init (EV_A_ flags);
		1502
		1503	if (ev_backend (EV_A))
		1504	{
		1505	#ifndef _WIN32
		1506	ev_signal_init (&childev, childcb, SIGCHLD);
		1507	ev_set_priority (&childev, EV_MAXPRI);
		1508	ev_signal_start (EV_A_ &childev);
		1509	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1510	#endif
		1511	}
		1512	else
		1513	ev_default_loop_ptr = 0;
		1514	}
		1515
		1516	return ev_default_loop_ptr;
		1517	}
		1518
		1519	void
		1520	ev_default_destroy (void)
		1521	{
		1522	#if EV_MULTIPLICITY
		1523	struct ev_loop *loop = ev_default_loop_ptr;
		1524	#endif
		1525
		1526	#ifndef _WIN32
		1527	ev_ref (EV_A); /* child watcher */
		1528	ev_signal_stop (EV_A_ &childev);
		1529	#endif
		1530
		1531	loop_destroy (EV_A);
		1532	}
		1533
		1534	void
		1535	ev_default_fork (void)
		1536	{
		1537	#if EV_MULTIPLICITY
		1538	struct ev_loop *loop = ev_default_loop_ptr;
		1539	#endif
		1540
		1541	if (backend)
		1542	postfork = 1; /* must be in line with ev_loop_fork */
		1543	}
		1544
		1545	/*****************************************************************************/
		1546
		1547	void
		1548	ev_invoke (EV_P_ void *w, int revents)
		1549	{
		1550	EV_CB_INVOKE ((W)w, revents);
		1551	}
		1552
		1553	void inline_speed
		1554	call_pending (EV_P)
		1555	{
		1556	int pri;
		1557
		1558	for (pri = NUMPRI; pri--; )
		1559	while (pendingcnt [pri])
258	{	1560	{
259	struct ev_timer *w = timers [0];	1561	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
260		1562
		1563	if (expect_true (p->w))
		1564	{
		1565	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1566
		1567	p->w->pending = 0;
		1568	EV_CB_INVOKE (p->w, p->events);
		1569	}
		1570	}
		1571	}
		1572
		1573	#if EV_IDLE_ENABLE
		1574	void inline_size
		1575	idle_reify (EV_P)
		1576	{
		1577	if (expect_false (idleall))
		1578	{
		1579	int pri;
		1580
		1581	for (pri = NUMPRI; pri--; )
		1582	{
		1583	if (pendingcnt [pri])
		1584	break;
		1585
		1586	if (idlecnt [pri])
		1587	{
		1588	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1589	break;
		1590	}
		1591	}
		1592	}
		1593	}
		1594	#endif
		1595
		1596	void inline_size
		1597	timers_reify (EV_P)
		1598	{
		1599	while (timercnt && ANHE_at (timers [HEAP0]) <= mn_now)
		1600	{
		1601	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1602
		1603	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1604
261	/* first reschedule timer */	1605	/* first reschedule or stop timer */
262	if (w->repeat)	1606	if (w->repeat)
263	{	1607	{
264	if (w->is_abs)	1608	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
265	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1609
266	else
267	w->at = ev_now + w->repeat;	1610	ev_at (w) += w->repeat;
		1611	if (ev_at (w) < mn_now)
		1612	ev_at (w) = mn_now;
268		1613
269	downheap (0);	1614	downheap (timers, timercnt, HEAP0);
270	}	1615	}
271	else	1616	else
272	evtimer_stop (w); /* nonrepeating: stop timer */	1617	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
273		1618
274	event ((struct ev_watcher *)w, EV_TIMEOUT);	1619	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1620	}
		1621	}
		1622
		1623	#if EV_PERIODIC_ENABLE
		1624	void inline_size
		1625	periodics_reify (EV_P)
		1626	{
		1627	while (periodiccnt && ANHE_at (periodics [HEAP0]) <= ev_rt_now)
275	}	1628	{
276	}	1629	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
277		1630
278	int ev_loop_done;	1631	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
279		1632
		1633	/* first reschedule or stop timer */
		1634	if (w->reschedule_cb)
		1635	{
		1636	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1637	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1638	downheap (periodics, periodiccnt, 1);
		1639	}
		1640	else if (w->interval)
		1641	{
		1642	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1643	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1644	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1645	downheap (periodics, periodiccnt, HEAP0);
		1646	}
		1647	else
		1648	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1649
		1650	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1651	}
		1652	}
		1653
		1654	static void noinline
		1655	periodics_reschedule (EV_P)
		1656	{
		1657	int i;
		1658
		1659	/* adjust periodics after time jump */
		1660	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1661	{
		1662	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
		1663
		1664	if (w->reschedule_cb)
		1665	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1666	else if (w->interval)
		1667	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1668	}
		1669
		1670	/* now rebuild the heap, this for the 2-heap, inefficient for the 4-heap, but correct */
		1671	for (i = periodiccnt >> 1; --i; )
		1672	downheap (periodics, periodiccnt, i + HEAP0);
		1673	}
		1674	#endif
		1675
		1676	void inline_speed
		1677	time_update (EV_P_ ev_tstamp max_block)
		1678	{
		1679	int i;
		1680
		1681	#if EV_USE_MONOTONIC
		1682	if (expect_true (have_monotonic))
		1683	{
		1684	ev_tstamp odiff = rtmn_diff;
		1685
		1686	mn_now = get_clock ();
		1687
		1688	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1689	/* interpolate in the meantime */
		1690	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1691	{
		1692	ev_rt_now = rtmn_diff + mn_now;
		1693	return;
		1694	}
		1695
		1696	now_floor = mn_now;
		1697	ev_rt_now = ev_time ();
		1698
		1699	/* loop a few times, before making important decisions.
		1700	* on the choice of "4": one iteration isn't enough,
		1701	* in case we get preempted during the calls to
		1702	* ev_time and get_clock. a second call is almost guaranteed
		1703	* to succeed in that case, though. and looping a few more times
		1704	* doesn't hurt either as we only do this on time-jumps or
		1705	* in the unlikely event of having been preempted here.
		1706	*/
		1707	for (i = 4; --i; )
		1708	{
		1709	rtmn_diff = ev_rt_now - mn_now;
		1710
		1711	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1712	return; /* all is well */
		1713
		1714	ev_rt_now = ev_time ();
		1715	mn_now = get_clock ();
		1716	now_floor = mn_now;
		1717	}
		1718
		1719	# if EV_PERIODIC_ENABLE
		1720	periodics_reschedule (EV_A);
		1721	# endif
		1722	/* no timer adjustment, as the monotonic clock doesn't jump */
		1723	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1724	}
		1725	else
		1726	#endif
		1727	{
		1728	ev_rt_now = ev_time ();
		1729
		1730	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1731	{
		1732	#if EV_PERIODIC_ENABLE
		1733	periodics_reschedule (EV_A);
		1734	#endif
		1735	/* adjust timers. this is easy, as the offset is the same for all of them */
		1736	for (i = 0; i < timercnt; ++i)
		1737	{
		1738	ANHE *he = timers + i + HEAP0;
		1739	ANHE_w (*he)->at += ev_rt_now - mn_now;
		1740	ANHE_at_set (*he);
		1741	}
		1742	}
		1743
		1744	mn_now = ev_rt_now;
		1745	}
		1746	}
		1747
		1748	void
		1749	ev_ref (EV_P)
		1750	{
		1751	++activecnt;
		1752	}
		1753
		1754	void
		1755	ev_unref (EV_P)
		1756	{
		1757	--activecnt;
		1758	}
		1759
		1760	static int loop_done;
		1761
		1762	void
280	int ev_loop (int flags)	1763	ev_loop (EV_P_ int flags)
281	{	1764	{
282	double block;	1765	loop_done = EVUNLOOP_CANCEL;
283	ev_loop_done = flags & EVLOOP_ONESHOT;	1766
		1767	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
284		1768
285	do	1769	do
286	{	1770	{
		1771	#ifndef _WIN32
		1772	if (expect_false (curpid)) /* penalise the forking check even more */
		1773	if (expect_false (getpid () != curpid))
		1774	{
		1775	curpid = getpid ();
		1776	postfork = 1;
		1777	}
		1778	#endif
		1779
		1780	#if EV_FORK_ENABLE
		1781	/* we might have forked, so queue fork handlers */
		1782	if (expect_false (postfork))
		1783	if (forkcnt)
		1784	{
		1785	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1786	call_pending (EV_A);
		1787	}
		1788	#endif
		1789
		1790	/* queue prepare watchers (and execute them) */
		1791	if (expect_false (preparecnt))
		1792	{
		1793	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1794	call_pending (EV_A);
		1795	}
		1796
		1797	if (expect_false (!activecnt))
		1798	break;
		1799
		1800	/* we might have forked, so reify kernel state if necessary */
		1801	if (expect_false (postfork))
		1802	loop_fork (EV_A);
		1803
287	/* update fd-related kernel structures */	1804	/* update fd-related kernel structures */
288	method_reify (); fdchangecnt = 0;	1805	fd_reify (EV_A);
289		1806
290	/* calculate blocking time */	1807	/* calculate blocking time */
291	ev_now = ev_time ();	1808	{
		1809	ev_tstamp waittime = 0.;
		1810	ev_tstamp sleeptime = 0.;
292		1811
293	if (flags & EVLOOP_NONBLOCK)	1812	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
294	block = 0.;
295	else if (!timercnt)
296	block = MAX_BLOCKTIME;
297	else
298	{	1813	{
299	block = timers [0]->at - ev_now + method_fudge;	1814	/* update time to cancel out callback processing overhead */
300	if (block < 0.) block = 0.;	1815	time_update (EV_A_ 1e100);
301	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;	1816
		1817	waittime = MAX_BLOCKTIME;
		1818
		1819	if (timercnt)
		1820	{
		1821	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
		1822	if (waittime > to) waittime = to;
		1823	}
		1824
		1825	#if EV_PERIODIC_ENABLE
		1826	if (periodiccnt)
		1827	{
		1828	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
		1829	if (waittime > to) waittime = to;
		1830	}
		1831	#endif
		1832
		1833	if (expect_false (waittime < timeout_blocktime))
		1834	waittime = timeout_blocktime;
		1835
		1836	sleeptime = waittime - backend_fudge;
		1837
		1838	if (expect_true (sleeptime > io_blocktime))
		1839	sleeptime = io_blocktime;
		1840
		1841	if (sleeptime)
		1842	{
		1843	ev_sleep (sleeptime);
		1844	waittime -= sleeptime;
		1845	}
302	}	1846	}
303		1847
304	method_poll (block);	1848	++loop_count;
		1849	backend_poll (EV_A_ waittime);
305		1850
		1851	/* update ev_rt_now, do magic */
		1852	time_update (EV_A_ waittime + sleeptime);
		1853	}
		1854
306	/* put pending timers into pendign queue and reschedule them */	1855	/* queue pending timers and reschedule them */
		1856	timers_reify (EV_A); /* relative timers called last */
		1857	#if EV_PERIODIC_ENABLE
		1858	periodics_reify (EV_A); /* absolute timers called first */
		1859	#endif
		1860
		1861	#if EV_IDLE_ENABLE
		1862	/* queue idle watchers unless other events are pending */
307	timer_reify ();	1863	idle_reify (EV_A);
		1864	#endif
308		1865
309	ev_now = ev_time ();	1866	/* queue check watchers, to be executed first */
		1867	if (expect_false (checkcnt))
		1868	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1869
310	call_pending ();	1870	call_pending (EV_A);
311	}	1871	}
312	while (!ev_loop_done);	1872	while (expect_true (
313	}	1873	activecnt
		1874	&& !loop_done
		1875	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1876	));
314		1877
315	static void	1878	if (loop_done == EVUNLOOP_ONE)
316	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1879	loop_done = EVUNLOOP_CANCEL;
		1880	}
		1881
		1882	void
		1883	ev_unloop (EV_P_ int how)
		1884	{
		1885	loop_done = how;
		1886	}
		1887
		1888	/*****************************************************************************/
		1889
		1890	void inline_size
		1891	wlist_add (WL *head, WL elem)
317	{	1892	{
318	elem->next = *head;	1893	elem->next = *head;
319	*head = elem;	1894	*head = elem;
320	}	1895	}
321		1896
322	static void	1897	void inline_size
323	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1898	wlist_del (WL *head, WL elem)
324	{	1899	{
325	while (*head)	1900	while (*head)
326	{	1901	{
327	if (*head == elem)	1902	if (*head == elem)
328	{	1903	{
…		…
332		1907
333	head = &(*head)->next;	1908	head = &(*head)->next;
334	}	1909	}
335	}	1910	}
336		1911
		1912	void inline_speed
		1913	clear_pending (EV_P_ W w)
		1914	{
		1915	if (w->pending)
		1916	{
		1917	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1918	w->pending = 0;
		1919	}
		1920	}
		1921
		1922	int
		1923	ev_clear_pending (EV_P_ void *w)
		1924	{
		1925	W w_ = (W)w;
		1926	int pending = w_->pending;
		1927
		1928	if (expect_true (pending))
		1929	{
		1930	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1931	w_->pending = 0;
		1932	p->w = 0;
		1933	return p->events;
		1934	}
		1935	else
		1936	return 0;
		1937	}
		1938
		1939	void inline_size
		1940	pri_adjust (EV_P_ W w)
		1941	{
		1942	int pri = w->priority;
		1943	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1944	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1945	w->priority = pri;
		1946	}
		1947
		1948	void inline_speed
		1949	ev_start (EV_P_ W w, int active)
		1950	{
		1951	pri_adjust (EV_A_ w);
		1952	w->active = active;
		1953	ev_ref (EV_A);
		1954	}
		1955
		1956	void inline_size
		1957	ev_stop (EV_P_ W w)
		1958	{
		1959	ev_unref (EV_A);
		1960	w->active = 0;
		1961	}
		1962
		1963	/*****************************************************************************/
		1964
		1965	void noinline
		1966	ev_io_start (EV_P_ ev_io *w)
		1967	{
		1968	int fd = w->fd;
		1969
		1970	if (expect_false (ev_is_active (w)))
		1971	return;
		1972
		1973	assert (("ev_io_start called with negative fd", fd >= 0));
		1974
		1975	ev_start (EV_A_ (W)w, 1);
		1976	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1977	wlist_add (&anfds[fd].head, (WL)w);
		1978
		1979	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1980	w->events &= ~EV_IOFDSET;
		1981	}
		1982
		1983	void noinline
		1984	ev_io_stop (EV_P_ ev_io *w)
		1985	{
		1986	clear_pending (EV_A_ (W)w);
		1987	if (expect_false (!ev_is_active (w)))
		1988	return;
		1989
		1990	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1991
		1992	wlist_del (&anfds[w->fd].head, (WL)w);
		1993	ev_stop (EV_A_ (W)w);
		1994
		1995	fd_change (EV_A_ w->fd, 1);
		1996	}
		1997
		1998	void noinline
		1999	ev_timer_start (EV_P_ ev_timer *w)
		2000	{
		2001	if (expect_false (ev_is_active (w)))
		2002	return;
		2003
		2004	ev_at (w) += mn_now;
		2005
		2006	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		2007
		2008	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
		2009	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
		2010	ANHE_w (timers [ev_active (w)]) = (WT)w;
		2011	ANHE_at_set (timers [ev_active (w)]);
		2012	upheap (timers, ev_active (w));
		2013
		2014	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		2015	}
		2016
		2017	void noinline
		2018	ev_timer_stop (EV_P_ ev_timer *w)
		2019	{
		2020	clear_pending (EV_A_ (W)w);
		2021	if (expect_false (!ev_is_active (w)))
		2022	return;
		2023
		2024	{
		2025	int active = ev_active (w);
		2026
		2027	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2028
		2029	if (expect_true (active < timercnt + HEAP0 - 1))
		2030	{
		2031	timers [active] = timers [timercnt + HEAP0 - 1];
		2032	adjustheap (timers, timercnt, active);
		2033	}
		2034
		2035	--timercnt;
		2036	}
		2037
		2038	ev_at (w) -= mn_now;
		2039
		2040	ev_stop (EV_A_ (W)w);
		2041	}
		2042
		2043	void noinline
		2044	ev_timer_again (EV_P_ ev_timer *w)
		2045	{
		2046	if (ev_is_active (w))
		2047	{
		2048	if (w->repeat)
		2049	{
		2050	ev_at (w) = mn_now + w->repeat;
		2051	ANHE_at_set (timers [ev_active (w)]);
		2052	adjustheap (timers, timercnt, ev_active (w));
		2053	}
		2054	else
		2055	ev_timer_stop (EV_A_ w);
		2056	}
		2057	else if (w->repeat)
		2058	{
		2059	ev_at (w) = w->repeat;
		2060	ev_timer_start (EV_A_ w);
		2061	}
		2062	}
		2063
		2064	#if EV_PERIODIC_ENABLE
		2065	void noinline
		2066	ev_periodic_start (EV_P_ ev_periodic *w)
		2067	{
		2068	if (expect_false (ev_is_active (w)))
		2069	return;
		2070
		2071	if (w->reschedule_cb)
		2072	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2073	else if (w->interval)
		2074	{
		2075	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		2076	/* this formula differs from the one in periodic_reify because we do not always round up */
		2077	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2078	}
		2079	else
		2080	ev_at (w) = w->offset;
		2081
		2082	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
		2083	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
		2084	ANHE_w (periodics [ev_active (w)]) = (WT)w;
		2085	upheap (periodics, ev_active (w));
		2086
		2087	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
		2088	}
		2089
		2090	void noinline
		2091	ev_periodic_stop (EV_P_ ev_periodic *w)
		2092	{
		2093	clear_pending (EV_A_ (W)w);
		2094	if (expect_false (!ev_is_active (w)))
		2095	return;
		2096
		2097	{
		2098	int active = ev_active (w);
		2099
		2100	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2101
		2102	if (expect_true (active < periodiccnt + HEAP0 - 1))
		2103	{
		2104	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
		2105	adjustheap (periodics, periodiccnt, active);
		2106	}
		2107
		2108	--periodiccnt;
		2109	}
		2110
		2111	ev_stop (EV_A_ (W)w);
		2112	}
		2113
		2114	void noinline
		2115	ev_periodic_again (EV_P_ ev_periodic *w)
		2116	{
		2117	/* TODO: use adjustheap and recalculation */
		2118	ev_periodic_stop (EV_A_ w);
		2119	ev_periodic_start (EV_A_ w);
		2120	}
		2121	#endif
		2122
		2123	#ifndef SA_RESTART
		2124	# define SA_RESTART 0
		2125	#endif
		2126
		2127	void noinline
		2128	ev_signal_start (EV_P_ ev_signal *w)
		2129	{
		2130	#if EV_MULTIPLICITY
		2131	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2132	#endif
		2133	if (expect_false (ev_is_active (w)))
		2134	return;
		2135
		2136	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2137
		2138	evpipe_init (EV_A);
		2139
		2140	{
		2141	#ifndef _WIN32
		2142	sigset_t full, prev;
		2143	sigfillset (&full);
		2144	sigprocmask (SIG_SETMASK, &full, &prev);
		2145	#endif
		2146
		2147	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2148
		2149	#ifndef _WIN32
		2150	sigprocmask (SIG_SETMASK, &prev, 0);
		2151	#endif
		2152	}
		2153
		2154	ev_start (EV_A_ (W)w, 1);
		2155	wlist_add (&signals [w->signum - 1].head, (WL)w);
		2156
		2157	if (!((WL)w)->next)
		2158	{
		2159	#if _WIN32
		2160	signal (w->signum, ev_sighandler);
		2161	#else
		2162	struct sigaction sa;
		2163	sa.sa_handler = ev_sighandler;
		2164	sigfillset (&sa.sa_mask);
		2165	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		2166	sigaction (w->signum, &sa, 0);
		2167	#endif
		2168	}
		2169	}
		2170
		2171	void noinline
		2172	ev_signal_stop (EV_P_ ev_signal *w)
		2173	{
		2174	clear_pending (EV_A_ (W)w);
		2175	if (expect_false (!ev_is_active (w)))
		2176	return;
		2177
		2178	wlist_del (&signals [w->signum - 1].head, (WL)w);
		2179	ev_stop (EV_A_ (W)w);
		2180
		2181	if (!signals [w->signum - 1].head)
		2182	signal (w->signum, SIG_DFL);
		2183	}
		2184
		2185	void
		2186	ev_child_start (EV_P_ ev_child *w)
		2187	{
		2188	#if EV_MULTIPLICITY
		2189	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2190	#endif
		2191	if (expect_false (ev_is_active (w)))
		2192	return;
		2193
		2194	ev_start (EV_A_ (W)w, 1);
		2195	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2196	}
		2197
		2198	void
		2199	ev_child_stop (EV_P_ ev_child *w)
		2200	{
		2201	clear_pending (EV_A_ (W)w);
		2202	if (expect_false (!ev_is_active (w)))
		2203	return;
		2204
		2205	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2206	ev_stop (EV_A_ (W)w);
		2207	}
		2208
		2209	#if EV_STAT_ENABLE
		2210
		2211	# ifdef _WIN32
		2212	# undef lstat
		2213	# define lstat(a,b) _stati64 (a,b)
		2214	# endif
		2215
		2216	#define DEF_STAT_INTERVAL 5.0074891
		2217	#define MIN_STAT_INTERVAL 0.1074891
		2218
		2219	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2220
		2221	#if EV_USE_INOTIFY
		2222	# define EV_INOTIFY_BUFSIZE 8192
		2223
		2224	static void noinline
		2225	infy_add (EV_P_ ev_stat *w)
		2226	{
		2227	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);
		2228
		2229	if (w->wd < 0)
		2230	{
		2231	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2232
		2233	/* monitor some parent directory for speedup hints */
		2234	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2235	/* but an efficiency issue only */
		2236	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2237	{
		2238	char path [4096];
		2239	strcpy (path, w->path);
		2240
		2241	do
		2242	{
		2243	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2244	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2245
		2246	char *pend = strrchr (path, '/');
		2247
		2248	if (!pend)
		2249	break; /* whoops, no '/', complain to your admin */
		2250
		2251	*pend = 0;
		2252	w->wd = inotify_add_watch (fs_fd, path, mask);
		2253	}
		2254	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2255	}
		2256	}
		2257	else
		2258	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2259
		2260	if (w->wd >= 0)
		2261	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2262	}
		2263
		2264	static void noinline
		2265	infy_del (EV_P_ ev_stat *w)
		2266	{
		2267	int slot;
		2268	int wd = w->wd;
		2269
		2270	if (wd < 0)
		2271	return;
		2272
		2273	w->wd = -2;
		2274	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2275	wlist_del (&fs_hash [slot].head, (WL)w);
		2276
		2277	/* remove this watcher, if others are watching it, they will rearm */
		2278	inotify_rm_watch (fs_fd, wd);
		2279	}
		2280
		2281	static void noinline
		2282	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2283	{
		2284	if (slot < 0)
		2285	/* overflow, need to check for all hahs slots */
		2286	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2287	infy_wd (EV_A_ slot, wd, ev);
		2288	else
		2289	{
		2290	WL w_;
		2291
		2292	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2293	{
		2294	ev_stat *w = (ev_stat *)w_;
		2295	w_ = w_->next; /* lets us remove this watcher and all before it */
		2296
		2297	if (w->wd == wd || wd == -1)
		2298	{
		2299	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2300	{
		2301	w->wd = -1;
		2302	infy_add (EV_A_ w); /* re-add, no matter what */
		2303	}
		2304
		2305	stat_timer_cb (EV_A_ &w->timer, 0);
		2306	}
		2307	}
		2308	}
		2309	}
		2310
337	static void	2311	static void
338	ev_start (struct ev_watcher *w, int active)	2312	infy_cb (EV_P_ ev_io *w, int revents)
339	{	2313	{
340	w->pending = 0;	2314	char buf [EV_INOTIFY_BUFSIZE];
341	w->active = active;	2315	struct inotify_event *ev = (struct inotify_event *)buf;
		2316	int ofs;
		2317	int len = read (fs_fd, buf, sizeof (buf));
		2318
		2319	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2320	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2321	}
		2322
		2323	void inline_size
		2324	infy_init (EV_P)
		2325	{
		2326	if (fs_fd != -2)
		2327	return;
		2328
		2329	fs_fd = inotify_init ();
		2330
		2331	if (fs_fd >= 0)
		2332	{
		2333	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2334	ev_set_priority (&fs_w, EV_MAXPRI);
		2335	ev_io_start (EV_A_ &fs_w);
		2336	}
		2337	}
		2338
		2339	void inline_size
		2340	infy_fork (EV_P)
		2341	{
		2342	int slot;
		2343
		2344	if (fs_fd < 0)
		2345	return;
		2346
		2347	close (fs_fd);
		2348	fs_fd = inotify_init ();
		2349
		2350	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2351	{
		2352	WL w_ = fs_hash [slot].head;
		2353	fs_hash [slot].head = 0;
		2354
		2355	while (w_)
		2356	{
		2357	ev_stat *w = (ev_stat *)w_;
		2358	w_ = w_->next; /* lets us add this watcher */
		2359
		2360	w->wd = -1;
		2361
		2362	if (fs_fd >= 0)
		2363	infy_add (EV_A_ w); /* re-add, no matter what */
		2364	else
		2365	ev_timer_start (EV_A_ &w->timer);
		2366	}
		2367
		2368	}
		2369	}
		2370
		2371	#endif
		2372
		2373	void
		2374	ev_stat_stat (EV_P_ ev_stat *w)
		2375	{
		2376	if (lstat (w->path, &w->attr) < 0)
		2377	w->attr.st_nlink = 0;
		2378	else if (!w->attr.st_nlink)
		2379	w->attr.st_nlink = 1;
		2380	}
		2381
		2382	static void noinline
		2383	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2384	{
		2385	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2386
		2387	/* we copy this here each the time so that */
		2388	/* prev has the old value when the callback gets invoked */
		2389	w->prev = w->attr;
		2390	ev_stat_stat (EV_A_ w);
		2391
		2392	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2393	if (
		2394	w->prev.st_dev != w->attr.st_dev
		2395	|| w->prev.st_ino != w->attr.st_ino
		2396	|| w->prev.st_mode != w->attr.st_mode
		2397	|| w->prev.st_nlink != w->attr.st_nlink
		2398	|| w->prev.st_uid != w->attr.st_uid
		2399	|| w->prev.st_gid != w->attr.st_gid
		2400	|| w->prev.st_rdev != w->attr.st_rdev
		2401	|| w->prev.st_size != w->attr.st_size
		2402	|| w->prev.st_atime != w->attr.st_atime
		2403	|| w->prev.st_mtime != w->attr.st_mtime
		2404	|| w->prev.st_ctime != w->attr.st_ctime
		2405	) {
		2406	#if EV_USE_INOTIFY
		2407	infy_del (EV_A_ w);
		2408	infy_add (EV_A_ w);
		2409	ev_stat_stat (EV_A_ w); /* avoid race... */
		2410	#endif
		2411
		2412	ev_feed_event (EV_A_ w, EV_STAT);
		2413	}
		2414	}
		2415
		2416	void
		2417	ev_stat_start (EV_P_ ev_stat *w)
		2418	{
		2419	if (expect_false (ev_is_active (w)))
		2420	return;
		2421
		2422	/* since we use memcmp, we need to clear any padding data etc. */
		2423	memset (&w->prev, 0, sizeof (ev_statdata));
		2424	memset (&w->attr, 0, sizeof (ev_statdata));
		2425
		2426	ev_stat_stat (EV_A_ w);
		2427
		2428	if (w->interval < MIN_STAT_INTERVAL)
		2429	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2430
		2431	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2432	ev_set_priority (&w->timer, ev_priority (w));
		2433
		2434	#if EV_USE_INOTIFY
		2435	infy_init (EV_A);
		2436
		2437	if (fs_fd >= 0)
		2438	infy_add (EV_A_ w);
		2439	else
		2440	#endif
		2441	ev_timer_start (EV_A_ &w->timer);
		2442
		2443	ev_start (EV_A_ (W)w, 1);
		2444	}
		2445
		2446	void
		2447	ev_stat_stop (EV_P_ ev_stat *w)
		2448	{
		2449	clear_pending (EV_A_ (W)w);
		2450	if (expect_false (!ev_is_active (w)))
		2451	return;
		2452
		2453	#if EV_USE_INOTIFY
		2454	infy_del (EV_A_ w);
		2455	#endif
		2456	ev_timer_stop (EV_A_ &w->timer);
		2457
		2458	ev_stop (EV_A_ (W)w);
		2459	}
		2460	#endif
		2461
		2462	#if EV_IDLE_ENABLE
		2463	void
		2464	ev_idle_start (EV_P_ ev_idle *w)
		2465	{
		2466	if (expect_false (ev_is_active (w)))
		2467	return;
		2468
		2469	pri_adjust (EV_A_ (W)w);
		2470
		2471	{
		2472	int active = ++idlecnt [ABSPRI (w)];
		2473
		2474	++idleall;
		2475	ev_start (EV_A_ (W)w, active);
		2476
		2477	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2478	idles [ABSPRI (w)][active - 1] = w;
		2479	}
		2480	}
		2481
		2482	void
		2483	ev_idle_stop (EV_P_ ev_idle *w)
		2484	{
		2485	clear_pending (EV_A_ (W)w);
		2486	if (expect_false (!ev_is_active (w)))
		2487	return;
		2488
		2489	{
		2490	int active = ev_active (w);
		2491
		2492	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2493	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2494
		2495	ev_stop (EV_A_ (W)w);
		2496	--idleall;
		2497	}
		2498	}
		2499	#endif
		2500
		2501	void
		2502	ev_prepare_start (EV_P_ ev_prepare *w)
		2503	{
		2504	if (expect_false (ev_is_active (w)))
		2505	return;
		2506
		2507	ev_start (EV_A_ (W)w, ++preparecnt);
		2508	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2509	prepares [preparecnt - 1] = w;
		2510	}
		2511
		2512	void
		2513	ev_prepare_stop (EV_P_ ev_prepare *w)
		2514	{
		2515	clear_pending (EV_A_ (W)w);
		2516	if (expect_false (!ev_is_active (w)))
		2517	return;
		2518
		2519	{
		2520	int active = ev_active (w);
		2521
		2522	prepares [active - 1] = prepares [--preparecnt];
		2523	ev_active (prepares [active - 1]) = active;
		2524	}
		2525
		2526	ev_stop (EV_A_ (W)w);
		2527	}
		2528
		2529	void
		2530	ev_check_start (EV_P_ ev_check *w)
		2531	{
		2532	if (expect_false (ev_is_active (w)))
		2533	return;
		2534
		2535	ev_start (EV_A_ (W)w, ++checkcnt);
		2536	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2537	checks [checkcnt - 1] = w;
		2538	}
		2539
		2540	void
		2541	ev_check_stop (EV_P_ ev_check *w)
		2542	{
		2543	clear_pending (EV_A_ (W)w);
		2544	if (expect_false (!ev_is_active (w)))
		2545	return;
		2546
		2547	{
		2548	int active = ev_active (w);
		2549
		2550	checks [active - 1] = checks [--checkcnt];
		2551	ev_active (checks [active - 1]) = active;
		2552	}
		2553
		2554	ev_stop (EV_A_ (W)w);
		2555	}
		2556
		2557	#if EV_EMBED_ENABLE
		2558	void noinline
		2559	ev_embed_sweep (EV_P_ ev_embed *w)
		2560	{
		2561	ev_loop (w->other, EVLOOP_NONBLOCK);
342	}	2562	}
343		2563
344	static void	2564	static void
345	ev_stop (struct ev_watcher *w)	2565	embed_io_cb (EV_P_ ev_io *io, int revents)
346	{	2566	{
347	if (w->pending)	2567	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
348	pendings [w->pending - 1].w = 0;
349		2568
350	w->active = 0;
351	/* nop */
352	}
353
354	void
355	evio_start (struct ev_io *w)
356	{
357	if (ev_is_active (w))	2569	if (ev_cb (w))
		2570	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2571	else
		2572	ev_loop (w->other, EVLOOP_NONBLOCK);
		2573	}
		2574
		2575	static void
		2576	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2577	{
		2578	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2579
		2580	{
		2581	struct ev_loop *loop = w->other;
		2582
		2583	while (fdchangecnt)
		2584	{
		2585	fd_reify (EV_A);
		2586	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2587	}
		2588	}
		2589	}
		2590
		2591	#if 0
		2592	static void
		2593	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2594	{
		2595	ev_idle_stop (EV_A_ idle);
		2596	}
		2597	#endif
		2598
		2599	void
		2600	ev_embed_start (EV_P_ ev_embed *w)
		2601	{
		2602	if (expect_false (ev_is_active (w)))
358	return;	2603	return;
359		2604
360	int fd = w->fd;	2605	{
		2606	struct ev_loop *loop = w->other;
		2607	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2608	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2609	}
361		2610
362	ev_start ((struct ev_watcher *)w, 1);	2611	ev_set_priority (&w->io, ev_priority (w));
363	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	2612	ev_io_start (EV_A_ &w->io);
364	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
365		2613
366	++fdchangecnt;	2614	ev_prepare_init (&w->prepare, embed_prepare_cb);
367	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	2615	ev_set_priority (&w->prepare, EV_MINPRI);
368	fdchanges [fdchangecnt - 1] = fd;	2616	ev_prepare_start (EV_A_ &w->prepare);
369	}
370		2617
		2618	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2619
		2620	ev_start (EV_A_ (W)w, 1);
		2621	}
		2622
371	void	2623	void
372	evio_stop (struct ev_io *w)	2624	ev_embed_stop (EV_P_ ev_embed *w)
373	{	2625	{
		2626	clear_pending (EV_A_ (W)w);
374	if (!ev_is_active (w))	2627	if (expect_false (!ev_is_active (w)))
375	return;	2628	return;
376		2629
377	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	2630	ev_io_stop (EV_A_ &w->io);
378	ev_stop ((struct ev_watcher *)w);	2631	ev_prepare_stop (EV_A_ &w->prepare);
379		2632
380	++fdchangecnt;	2633	ev_stop (EV_A_ (W)w);
381	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
382	fdchanges [fdchangecnt - 1] = w->fd;
383	}	2634	}
		2635	#endif
384		2636
		2637	#if EV_FORK_ENABLE
385	void	2638	void
386	evtimer_start (struct ev_timer *w)	2639	ev_fork_start (EV_P_ ev_fork *w)
387	{	2640	{
388	if (ev_is_active (w))	2641	if (expect_false (ev_is_active (w)))
389	return;	2642	return;
390		2643
391	if (w->is_abs)	2644	ev_start (EV_A_ (W)w, ++forkcnt);
392	{	2645	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
393	/* this formula differs from the one in timer_reify becuse we do not round up */	2646	forks [forkcnt - 1] = w;
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
400	ev_start ((struct ev_watcher *)w, ++timercnt);
401	array_needsize (timers, timermax, timercnt, );
402	timers [timercnt - 1] = w;
403	upheap (timercnt - 1);
404	}	2647	}
405		2648
406	void	2649	void
407	evtimer_stop (struct ev_timer *w)	2650	ev_fork_stop (EV_P_ ev_fork *w)
408	{	2651	{
		2652	clear_pending (EV_A_ (W)w);
409	if (!ev_is_active (w))	2653	if (expect_false (!ev_is_active (w)))
410	return;	2654	return;
411		2655
412	if (w->active < timercnt--)
413	{	2656	{
414	timers [w->active - 1] = timers [timercnt];	2657	int active = ev_active (w);
415	downheap (w->active - 1);	2658
		2659	forks [active - 1] = forks [--forkcnt];
		2660	ev_active (forks [active - 1]) = active;
416	}	2661	}
417		2662
418	ev_stop ((struct ev_watcher *)w);	2663	ev_stop (EV_A_ (W)w);
419	}	2664	}
		2665	#endif
420		2666
		2667	#if EV_ASYNC_ENABLE
421	void	2668	void
422	evsignal_start (struct ev_signal *w)	2669	ev_async_start (EV_P_ ev_async *w)
423	{	2670	{
424	if (ev_is_active (w))	2671	if (expect_false (ev_is_active (w)))
425	return;	2672	return;
426		2673
427	ev_start ((struct ev_watcher *)w, 1);	2674	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		2675
		2676	ev_start (EV_A_ (W)w, ++asynccnt);
		2677	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2678	asyncs [asynccnt - 1] = w;
		2679	}
		2680
432	void	2681	void
433	evsignal_stop (struct ev_signal *w)	2682	ev_async_stop (EV_P_ ev_async *w)
434	{	2683	{
		2684	clear_pending (EV_A_ (W)w);
435	if (!ev_is_active (w))	2685	if (expect_false (!ev_is_active (w)))
436	return;	2686	return;
437		2687
438	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2688	{
439	ev_stop ((struct ev_watcher *)w);	2689	int active = ev_active (w);
		2690
		2691	asyncs [active - 1] = asyncs [--asynccnt];
		2692	ev_active (asyncs [active - 1]) = active;
		2693	}
		2694
		2695	ev_stop (EV_A_ (W)w);
440	}	2696	}
		2697
		2698	void
		2699	ev_async_send (EV_P_ ev_async *w)
		2700	{
		2701	w->sent = 1;
		2702	evpipe_write (EV_A_ &gotasync);
		2703	}
		2704	#endif
441		2705
442	/*****************************************************************************/	2706	/*****************************************************************************/
443	#if 1	2707
		2708	struct ev_once
		2709	{
		2710	ev_io io;
		2711	ev_timer to;
		2712	void (*cb)(int revents, void *arg);
		2713	void *arg;
		2714	};
444		2715
445	static void	2716	static void
446	sin_cb (struct ev_io *w, int revents)	2717	once_cb (EV_P_ struct ev_once *once, int revents)
447	{	2718	{
448	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2719	void (*cb)(int revents, void *arg) = once->cb;
		2720	void *arg = once->arg;
		2721
		2722	ev_io_stop (EV_A_ &once->io);
		2723	ev_timer_stop (EV_A_ &once->to);
		2724	ev_free (once);
		2725
		2726	cb (revents, arg);
449	}	2727	}
450		2728
451	static void	2729	static void
		2730	once_cb_io (EV_P_ ev_io *w, int revents)
		2731	{
		2732	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2733	}
		2734
		2735	static void
452	ocb (struct ev_timer *w, int revents)	2736	once_cb_to (EV_P_ ev_timer *w, int revents)
453	{	2737	{
454	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2738	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
455	}	2739	}
456		2740
457	int main (void)	2741	void
		2742	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
458	{	2743	{
459	struct ev_io sin;	2744	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
460		2745
461	ev_init (0);	2746	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	}	2747	{
479		2748	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
480	ev_loop (0);
481
482	return 0;	2749	return;
483	}	2750	}
484		2751
485	#endif	2752	once->cb = cb;
		2753	once->arg = arg;
486		2754
		2755	ev_init (&once->io, once_cb_io);
		2756	if (fd >= 0)
		2757	{
		2758	ev_io_set (&once->io, fd, events);
		2759	ev_io_start (EV_A_ &once->io);
		2760	}
487		2761
		2762	ev_init (&once->to, once_cb_to);
		2763	if (timeout >= 0.)
		2764	{
		2765	ev_timer_set (&once->to, timeout, 0.);
		2766	ev_timer_start (EV_A_ &once->to);
		2767	}
		2768	}
488		2769
		2770	#if EV_MULTIPLICITY
		2771	#include "ev_wrap.h"
		2772	#endif
489		2773
		2774	#ifdef __cplusplus
		2775	}
		2776	#endif
		2777

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