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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 1.237 by root, Wed May 7 15:16:56 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	typedef struct
		428	{
		429	WL head;
		430	} ANFS;
		431	#endif
		432
		433	#if EV_MULTIPLICITY
		434
		435	struct ev_loop
		436	{
		437	ev_tstamp ev_rt_now;
		438	#define ev_rt_now ((loop)->ev_rt_now)
		439	#define VAR(name,decl) decl;
		440	#include "ev_vars.h"
		441	#undef VAR
		442	};
20	#include "ev.h"	443	#include "ev_wrap.h"
21		444
22	struct ev_watcher {	445	static struct ev_loop default_loop_struct;
23	EV_WATCHER (ev_watcher);	446	struct ev_loop *ev_default_loop_ptr;
24	};
25		447
26	struct ev_watcher_list {	448	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		449
30	ev_tstamp ev_now;	450	ev_tstamp ev_rt_now;
31	int ev_method;	451	#define VAR(name,decl) static decl;
		452	#include "ev_vars.h"
		453	#undef VAR
32		454
33	static int have_monotonic; /* runtime */	455	static int ev_default_loop_ptr;
34		456
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	457	#endif
36	static void (*method_reify)(void);	458
37	static void (*method_poll)(ev_tstamp timeout);	459	/*****************************************************************************/
38		460
39	ev_tstamp	461	ev_tstamp
40	ev_time (void)	462	ev_time (void)
41	{	463	{
42	#if HAVE_REALTIME	464	#if EV_USE_REALTIME
43	struct timespec ts;	465	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	466	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	467	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	468	#else
47	struct timeval tv;	469	struct timeval tv;
48	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	472	#endif
51	}	473	}
52		474
53	static ev_tstamp	475	ev_tstamp inline_size
54	get_clock (void)	476	get_clock (void)
55	{	477	{
56	#if HAVE_MONOTONIC	478	#if EV_USE_MONOTONIC
57	if (have_monotonic)	479	if (expect_true (have_monotonic))
58	{	480	{
59	struct timespec ts;	481	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	482	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	483	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	484	}
63	#endif	485	#endif
64		486
65	return ev_time ();	487	return ev_time ();
66	}	488	}
67		489
		490	#if EV_MULTIPLICITY
		491	ev_tstamp
		492	ev_now (EV_P)
		493	{
		494	return ev_rt_now;
		495	}
		496	#endif
		497
		498	void
		499	ev_sleep (ev_tstamp delay)
		500	{
		501	if (delay > 0.)
		502	{
		503	#if EV_USE_NANOSLEEP
		504	struct timespec ts;
		505
		506	ts.tv_sec = (time_t)delay;
		507	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		508
		509	nanosleep (&ts, 0);
		510	#elif defined(_WIN32)
		511	Sleep ((unsigned long)(delay * 1e3));
		512	#else
		513	struct timeval tv;
		514
		515	tv.tv_sec = (time_t)delay;
		516	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		517
		518	select (0, 0, 0, 0, &tv);
		519	#endif
		520	}
		521	}
		522
		523	/*****************************************************************************/
		524
		525	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		526
		527	int inline_size
		528	array_nextsize (int elem, int cur, int cnt)
		529	{
		530	int ncur = cur + 1;
		531
		532	do
		533	ncur <<= 1;
		534	while (cnt > ncur);
		535
		536	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		537	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		538	{
		539	ncur *= elem;
		540	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		541	ncur = ncur - sizeof (void *) * 4;
		542	ncur /= elem;
		543	}
		544
		545	return ncur;
		546	}
		547
		548	static noinline void *
		549	array_realloc (int elem, void *base, int *cur, int cnt)
		550	{
		551	*cur = array_nextsize (elem, *cur, cnt);
		552	return ev_realloc (base, elem * *cur);
		553	}
		554
68	#define array_needsize(base,cur,cnt,init) \	555	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	556	if (expect_false ((cnt) > (cur))) \
70	{ \	557	{ \
71	int newcnt = cur ? cur << 1 : 16; \	558	int ocur_ = (cur); \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	559	(base) = (type *)array_realloc \
73	base = realloc (base, sizeof (*base) * (newcnt)); \	560	(sizeof (type), (base), &(cur), (cnt)); \
74	init (base + cur, newcnt - cur); \	561	init ((base) + (ocur_), (cur) - ocur_); \
75	cur = newcnt; \	562	}
		563
		564	#if 0
		565	#define array_slim(type,stem) \
		566	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		567	{ \
		568	stem ## max = array_roundsize (stem ## cnt >> 1); \
		569	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		570	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		571	}
		572	#endif
		573
		574	#define array_free(stem, idx) \
		575	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		576
		577	/*****************************************************************************/
		578
		579	void noinline
		580	ev_feed_event (EV_P_ void *w, int revents)
		581	{
		582	W w_ = (W)w;
		583	int pri = ABSPRI (w_);
		584
		585	if (expect_false (w_->pending))
		586	pendings [pri][w_->pending - 1].events |= revents;
		587	else
		588	{
		589	w_->pending = ++pendingcnt [pri];
		590	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		591	pendings [pri][w_->pending - 1].w = w_;
		592	pendings [pri][w_->pending - 1].events = revents;
		593	}
		594	}
		595
		596	void inline_speed
		597	queue_events (EV_P_ W *events, int eventcnt, int type)
		598	{
		599	int i;
		600
		601	for (i = 0; i < eventcnt; ++i)
		602	ev_feed_event (EV_A_ events [i], type);
		603	}
		604
		605	/*****************************************************************************/
		606
		607	void inline_size
		608	anfds_init (ANFD *base, int count)
		609	{
		610	while (count--)
		611	{
		612	base->head = 0;
		613	base->events = EV_NONE;
		614	base->reify = 0;
		615
		616	++base;
		617	}
		618	}
		619
		620	void inline_speed
		621	fd_event (EV_P_ int fd, int revents)
		622	{
		623	ANFD *anfd = anfds + fd;
		624	ev_io *w;
		625
		626	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		627	{
		628	int ev = w->events & revents;
		629
		630	if (ev)
		631	ev_feed_event (EV_A_ (W)w, ev);
		632	}
		633	}
		634
		635	void
		636	ev_feed_fd_event (EV_P_ int fd, int revents)
		637	{
		638	if (fd >= 0 && fd < anfdmax)
		639	fd_event (EV_A_ fd, revents);
		640	}
		641
		642	void inline_size
		643	fd_reify (EV_P)
		644	{
		645	int i;
		646
		647	for (i = 0; i < fdchangecnt; ++i)
		648	{
		649	int fd = fdchanges [i];
		650	ANFD *anfd = anfds + fd;
		651	ev_io *w;
		652
		653	unsigned char events = 0;
		654
		655	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		656	events |= (unsigned char)w->events;
		657
		658	#if EV_SELECT_IS_WINSOCKET
		659	if (events)
		660	{
		661	unsigned long argp;
		662	#ifdef EV_FD_TO_WIN32_HANDLE
		663	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		664	#else
		665	anfd->handle = _get_osfhandle (fd);
		666	#endif
		667	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		668	}
		669	#endif
		670
		671	{
		672	unsigned char o_events = anfd->events;
		673	unsigned char o_reify = anfd->reify;
		674
		675	anfd->reify = 0;
		676	anfd->events = events;
		677
		678	if (o_events != events || o_reify & EV_IOFDSET)
		679	backend_modify (EV_A_ fd, o_events, events);
76	}	680	}
		681	}
		682
		683	fdchangecnt = 0;
		684	}
		685
		686	void inline_size
		687	fd_change (EV_P_ int fd, int flags)
		688	{
		689	unsigned char reify = anfds [fd].reify;
		690	anfds [fd].reify |= flags;
		691
		692	if (expect_true (!reify))
		693	{
		694	++fdchangecnt;
		695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		696	fdchanges [fdchangecnt - 1] = fd;
		697	}
		698	}
		699
		700	void inline_speed
		701	fd_kill (EV_P_ int fd)
		702	{
		703	ev_io *w;
		704
		705	while ((w = (ev_io *)anfds [fd].head))
		706	{
		707	ev_io_stop (EV_A_ w);
		708	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		709	}
		710	}
		711
		712	int inline_size
		713	fd_valid (int fd)
		714	{
		715	#ifdef _WIN32
		716	return _get_osfhandle (fd) != -1;
		717	#else
		718	return fcntl (fd, F_GETFD) != -1;
		719	#endif
		720	}
		721
		722	/* called on EBADF to verify fds */
		723	static void noinline
		724	fd_ebadf (EV_P)
		725	{
		726	int fd;
		727
		728	for (fd = 0; fd < anfdmax; ++fd)
		729	if (anfds [fd].events)
		730	if (!fd_valid (fd) == -1 && errno == EBADF)
		731	fd_kill (EV_A_ fd);
		732	}
		733
		734	/* called on ENOMEM in select/poll to kill some fds and retry */
		735	static void noinline
		736	fd_enomem (EV_P)
		737	{
		738	int fd;
		739
		740	for (fd = anfdmax; fd--; )
		741	if (anfds [fd].events)
		742	{
		743	fd_kill (EV_A_ fd);
		744	return;
		745	}
		746	}
		747
		748	/* usually called after fork if backend needs to re-arm all fds from scratch */
		749	static void noinline
		750	fd_rearm_all (EV_P)
		751	{
		752	int fd;
		753
		754	for (fd = 0; fd < anfdmax; ++fd)
		755	if (anfds [fd].events)
		756	{
		757	anfds [fd].events = 0;
		758	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		759	}
		760	}
		761
		762	/*****************************************************************************/
		763
		764	/*
		765	* at the moment we allow libev the luxury of two heaps,
		766	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		767	* which is more cache-efficient.
		768	* the difference is about 5% with 50000+ watchers.
		769	*/
		770	#define USE_4HEAP !EV_MINIMAL
		771	#if USE_4HEAP
		772
		773	#define DHEAP 4
		774	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		775
		776	/* towards the root */
		777	void inline_speed
		778	upheap (WT *heap, int k)
		779	{
		780	WT w = heap [k];
		781
		782	for (;;)
		783	{
		784	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
		785
		786	if (p >= HEAP0 || heap [p]->at <= w->at)
		787	break;
		788
		789	heap [k] = heap [p];
		790	ev_active (heap [k]) = k;
		791	k = p;
		792	}
		793
		794	heap [k] = w;
		795	ev_active (heap [k]) = k;
		796	}
		797
		798	/* away from the root */
		799	void inline_speed
		800	downheap (WT *heap, int N, int k)
		801	{
		802	WT w = heap [k];
		803	WT *E = heap + N + HEAP0;
		804
		805	for (;;)
		806	{
		807	ev_tstamp minat;
		808	WT *minpos;
		809	WT *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
		810
		811	// find minimum child
		812	if (expect_true (pos + DHEAP - 1 < E))
		813	{
		814	/* fast path */
		815	(minpos = pos + 0), (minat = (*minpos)->at);
		816	if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		817	if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		818	if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		819	}
		820	else
		821	{
		822	/* slow path */
		823	if (pos >= E)
		824	break;
		825	(minpos = pos + 0), (minat = (*minpos)->at);
		826	if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		827	if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		828	if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		829	}
		830
		831	if (w->at <= minat)
		832	break;
		833
		834	ev_active (*minpos) = k;
		835	heap [k] = *minpos;
		836
		837	k = minpos - heap;
		838	}
		839
		840	heap [k] = w;
		841	ev_active (heap [k]) = k;
		842	}
		843
		844	#else // 4HEAP
		845
		846	#define HEAP0 1
		847
		848	/* towards the root */
		849	void inline_speed
		850	upheap (WT *heap, int k)
		851	{
		852	WT w = heap [k];
		853
		854	for (;;)
		855	{
		856	int p = k >> 1;
		857
		858	/* maybe we could use a dummy element at heap [0]? */
		859	if (!p || heap [p]->at <= w->at)
		860	break;
		861
		862	heap [k] = heap [p];
		863	ev_active (heap [k]) = k;
		864	k = p;
		865	}
		866
		867	heap [k] = w;
		868	ev_active (heap [k]) = k;
		869	}
		870
		871	/* away from the root */
		872	void inline_speed
		873	downheap (WT *heap, int N, int k)
		874	{
		875	WT w = heap [k];
		876
		877	for (;;)
		878	{
		879	int c = k << 1;
		880
		881	if (c > N)
		882	break;
		883
		884	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		885	? 1 : 0;
		886
		887	if (w->at <= heap [c]->at)
		888	break;
		889
		890	heap [k] = heap [c];
		891	((W)heap [k])->active = k;
		892
		893	k = c;
		894	}
		895
		896	heap [k] = w;
		897	ev_active (heap [k]) = k;
		898	}
		899	#endif
		900
		901	void inline_size
		902	adjustheap (WT *heap, int N, int k)
		903	{
		904	upheap (heap, k);
		905	downheap (heap, N, k);
		906	}
		907
		908	/*****************************************************************************/
77		909
78	typedef struct	910	typedef struct
79	{	911	{
80	struct ev_io *head;	912	WL head;
81	unsigned char wev, rev; /* want, received event set */	913	EV_ATOMIC_T gotsig;
82	} ANFD;	914	} ANSIG;
83		915
84	static ANFD *anfds;	916	static ANSIG *signals;
85	static int anfdmax;	917	static int signalmax;
86		918
87	static int *fdchanges;	919	static EV_ATOMIC_T gotsig;
88	static int fdchangemax, fdchangecnt;	920
		921	void inline_size
		922	signals_init (ANSIG *base, int count)
		923	{
		924	while (count--)
		925	{
		926	base->head = 0;
		927	base->gotsig = 0;
		928
		929	++base;
		930	}
		931	}
		932
		933	/*****************************************************************************/
		934
		935	void inline_speed
		936	fd_intern (int fd)
		937	{
		938	#ifdef _WIN32
		939	int arg = 1;
		940	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		941	#else
		942	fcntl (fd, F_SETFD, FD_CLOEXEC);
		943	fcntl (fd, F_SETFL, O_NONBLOCK);
		944	#endif
		945	}
		946
		947	static void noinline
		948	evpipe_init (EV_P)
		949	{
		950	if (!ev_is_active (&pipeev))
		951	{
		952	#if EV_USE_EVENTFD
		953	if ((evfd = eventfd (0, 0)) >= 0)
		954	{
		955	evpipe [0] = -1;
		956	fd_intern (evfd);
		957	ev_io_set (&pipeev, evfd, EV_READ);
		958	}
		959	else
		960	#endif
		961	{
		962	while (pipe (evpipe))
		963	syserr ("(libev) error creating signal/async pipe");
		964
		965	fd_intern (evpipe [0]);
		966	fd_intern (evpipe [1]);
		967	ev_io_set (&pipeev, evpipe [0], EV_READ);
		968	}
		969
		970	ev_io_start (EV_A_ &pipeev);
		971	ev_unref (EV_A); /* watcher should not keep loop alive */
		972	}
		973	}
		974
		975	void inline_size
		976	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		977	{
		978	if (!*flag)
		979	{
		980	int old_errno = errno; /* save errno because write might clobber it */
		981
		982	*flag = 1;
		983
		984	#if EV_USE_EVENTFD
		985	if (evfd >= 0)
		986	{
		987	uint64_t counter = 1;
		988	write (evfd, &counter, sizeof (uint64_t));
		989	}
		990	else
		991	#endif
		992	write (evpipe [1], &old_errno, 1);
		993
		994	errno = old_errno;
		995	}
		996	}
89		997
90	static void	998	static void
91	anfds_init (ANFD *base, int count)	999	pipecb (EV_P_ ev_io *iow, int revents)
92	{	1000	{
93	while (count--)	1001	#if EV_USE_EVENTFD
94	{	1002	if (evfd >= 0)
95	base->head = 0;
96	base->wev = base->rev = EV_NONE;
97	++base;
98	}	1003	{
99	}	1004	uint64_t counter;
		1005	read (evfd, &counter, sizeof (uint64_t));
		1006	}
		1007	else
		1008	#endif
		1009	{
		1010	char dummy;
		1011	read (evpipe [0], &dummy, 1);
		1012	}
100		1013
101	typedef struct	1014	if (gotsig && ev_is_default_loop (EV_A))
102	{	1015	{
103	struct ev_watcher *w;	1016	int signum;
104	int events;	1017	gotsig = 0;
105	} ANPENDING;
106		1018
107	static ANPENDING *pendings;	1019	for (signum = signalmax; signum--; )
108	static int pendingmax, pendingcnt;	1020	if (signals [signum].gotsig)
		1021	ev_feed_signal_event (EV_A_ signum + 1);
		1022	}
		1023
		1024	#if EV_ASYNC_ENABLE
		1025	if (gotasync)
		1026	{
		1027	int i;
		1028	gotasync = 0;
		1029
		1030	for (i = asynccnt; i--; )
		1031	if (asyncs [i]->sent)
		1032	{
		1033	asyncs [i]->sent = 0;
		1034	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1035	}
		1036	}
		1037	#endif
		1038	}
		1039
		1040	/*****************************************************************************/
109		1041
110	static void	1042	static void
111	event (struct ev_watcher *w, int events)	1043	ev_sighandler (int signum)
112	{	1044	{
113	w->pending = ++pendingcnt;	1045	#if EV_MULTIPLICITY
114	array_needsize (pendings, pendingmax, pendingcnt, );	1046	struct ev_loop *loop = &default_loop_struct;
115	pendings [pendingcnt - 1].w = w;	1047	#endif
116	pendings [pendingcnt - 1].events = events;	1048
		1049	#if _WIN32
		1050	signal (signum, ev_sighandler);
		1051	#endif
		1052
		1053	signals [signum - 1].gotsig = 1;
		1054	evpipe_write (EV_A_ &gotsig);
117	}	1055	}
		1056
		1057	void noinline
		1058	ev_feed_signal_event (EV_P_ int signum)
		1059	{
		1060	WL w;
		1061
		1062	#if EV_MULTIPLICITY
		1063	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1064	#endif
		1065
		1066	--signum;
		1067
		1068	if (signum < 0 || signum >= signalmax)
		1069	return;
		1070
		1071	signals [signum].gotsig = 0;
		1072
		1073	for (w = signals [signum].head; w; w = w->next)
		1074	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1075	}
		1076
		1077	/*****************************************************************************/
		1078
		1079	static WL childs [EV_PID_HASHSIZE];
		1080
		1081	#ifndef _WIN32
		1082
		1083	static ev_signal childev;
		1084
		1085	#ifndef WIFCONTINUED
		1086	# define WIFCONTINUED(status) 0
		1087	#endif
		1088
		1089	void inline_speed
		1090	child_reap (EV_P_ int chain, int pid, int status)
		1091	{
		1092	ev_child *w;
		1093	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1094
		1095	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1096	{
		1097	if ((w->pid == pid || !w->pid)
		1098	&& (!traced || (w->flags & 1)))
		1099	{
		1100	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1101	w->rpid = pid;
		1102	w->rstatus = status;
		1103	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1104	}
		1105	}
		1106	}
		1107
		1108	#ifndef WCONTINUED
		1109	# define WCONTINUED 0
		1110	#endif
118		1111
119	static void	1112	static void
120	fd_event (int fd, int events)	1113	childcb (EV_P_ ev_signal *sw, int revents)
121	{	1114	{
122	ANFD *anfd = anfds + fd;	1115	int pid, status;
123	struct ev_io *w;
124		1116
125	for (w = anfd->head; w; w = w->next)	1117	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
126	{	1118	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
127	int ev = w->events & events;	1119	if (!WCONTINUED
		1120	|| errno != EINVAL
		1121	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1122	return;
128		1123
129	if (ev)	1124	/* make sure we are called again until all children have been reaped */
130	event ((struct ev_watcher *)w, ev);	1125	/* we need to do it this way so that the callback gets called before we continue */
131	}	1126	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
132	}
133		1127
134	static struct ev_timer **timers;	1128	child_reap (EV_A_ pid, pid, status);
135	static int timermax, timercnt;	1129	if (EV_PID_HASHSIZE > 1)
136		1130	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	}	1131	}
153		1132
154	static void	1133	#endif
155	downheap (int k)
156	{
157	struct ev_timer *w = timers [k];
158		1134
159	while (k < (timercnt >> 1))	1135	/*****************************************************************************/
160	{
161	int j = k << 1;
162		1136
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	1137	#if EV_USE_PORT
164	++j;	1138	# include "ev_port.c"
165		1139	#endif
166	if (w->at <= timers [j]->at)	1140	#if EV_USE_KQUEUE
167	break;	1141	# include "ev_kqueue.c"
168		1142	#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	1143	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	1144	# include "ev_epoll.c"
190	#endif	1145	#endif
		1146	#if EV_USE_POLL
		1147	# include "ev_poll.c"
		1148	#endif
191	#if HAVE_SELECT	1149	#if EV_USE_SELECT
192	# include "ev_select.c"	1150	# include "ev_select.c"
193	#endif	1151	#endif
194		1152
195	int ev_init (int flags)	1153	int
		1154	ev_version_major (void)
196	{	1155	{
		1156	return EV_VERSION_MAJOR;
		1157	}
		1158
		1159	int
		1160	ev_version_minor (void)
		1161	{
		1162	return EV_VERSION_MINOR;
		1163	}
		1164
		1165	/* return true if we are running with elevated privileges and should ignore env variables */
		1166	int inline_size
		1167	enable_secure (void)
		1168	{
		1169	#ifdef _WIN32
		1170	return 0;
		1171	#else
		1172	return getuid () != geteuid ()
		1173	|| getgid () != getegid ();
		1174	#endif
		1175	}
		1176
		1177	unsigned int
		1178	ev_supported_backends (void)
		1179	{
		1180	unsigned int flags = 0;
		1181
		1182	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1183	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1184	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1185	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1186	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1187
		1188	return flags;
		1189	}
		1190
		1191	unsigned int
		1192	ev_recommended_backends (void)
		1193	{
		1194	unsigned int flags = ev_supported_backends ();
		1195
		1196	#ifndef __NetBSD__
		1197	/* kqueue is borked on everything but netbsd apparently */
		1198	/* it usually doesn't work correctly on anything but sockets and pipes */
		1199	flags &= ~EVBACKEND_KQUEUE;
		1200	#endif
		1201	#ifdef __APPLE__
		1202	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1203	flags &= ~EVBACKEND_POLL;
		1204	#endif
		1205
		1206	return flags;
		1207	}
		1208
		1209	unsigned int
		1210	ev_embeddable_backends (void)
		1211	{
		1212	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1213
		1214	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1215	/* please fix it and tell me how to detect the fix */
		1216	flags &= ~EVBACKEND_EPOLL;
		1217
		1218	return flags;
		1219	}
		1220
		1221	unsigned int
		1222	ev_backend (EV_P)
		1223	{
		1224	return backend;
		1225	}
		1226
		1227	unsigned int
		1228	ev_loop_count (EV_P)
		1229	{
		1230	return loop_count;
		1231	}
		1232
		1233	void
		1234	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1235	{
		1236	io_blocktime = interval;
		1237	}
		1238
		1239	void
		1240	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1241	{
		1242	timeout_blocktime = interval;
		1243	}
		1244
		1245	static void noinline
		1246	loop_init (EV_P_ unsigned int flags)
		1247	{
		1248	if (!backend)
		1249	{
197	#if HAVE_MONOTONIC	1250	#if EV_USE_MONOTONIC
198	{	1251	{
199	struct timespec ts;	1252	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1253	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	1254	have_monotonic = 1;
202	}	1255	}
203	#endif	1256	#endif
204		1257
205	ev_now = ev_time ();	1258	ev_rt_now = ev_time ();
		1259	mn_now = get_clock ();
		1260	now_floor = mn_now;
		1261	rtmn_diff = ev_rt_now - mn_now;
206		1262
		1263	io_blocktime = 0.;
		1264	timeout_blocktime = 0.;
		1265	backend = 0;
		1266	backend_fd = -1;
		1267	gotasync = 0;
		1268	#if EV_USE_INOTIFY
		1269	fs_fd = -2;
		1270	#endif
		1271
		1272	/* pid check not overridable via env */
		1273	#ifndef _WIN32
		1274	if (flags & EVFLAG_FORKCHECK)
		1275	curpid = getpid ();
		1276	#endif
		1277
		1278	if (!(flags & EVFLAG_NOENV)
		1279	&& !enable_secure ()
		1280	&& getenv ("LIBEV_FLAGS"))
		1281	flags = atoi (getenv ("LIBEV_FLAGS"));
		1282
		1283	if (!(flags & 0x0000ffffU))
		1284	flags |= ev_recommended_backends ();
		1285
		1286	#if EV_USE_PORT
		1287	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1288	#endif
		1289	#if EV_USE_KQUEUE
		1290	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1291	#endif
207	#if HAVE_EPOLL	1292	#if EV_USE_EPOLL
208	if (epoll_init (flags))	1293	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
209	return ev_method;
210	#endif	1294	#endif
		1295	#if EV_USE_POLL
		1296	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1297	#endif
211	#if HAVE_SELECT	1298	#if EV_USE_SELECT
212	if (select_init (flags))	1299	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
213	return ev_method;
214	#endif	1300	#endif
215		1301
216	ev_method = EVMETHOD_NONE;	1302	ev_init (&pipeev, pipecb);
217	return ev_method;	1303	ev_set_priority (&pipeev, EV_MAXPRI);
		1304	}
218	}	1305	}
219		1306
220	void ev_prefork (void)	1307	static void noinline
221	{	1308	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	{	1309	{
238	int i;	1310	int i;
239		1311
240	for (i = 0; i < pendingcnt; ++i)	1312	if (ev_is_active (&pipeev))
241	{	1313	{
242	ANPENDING *p = pendings + i;	1314	ev_ref (EV_A); /* signal watcher */
		1315	ev_io_stop (EV_A_ &pipeev);
243		1316
244	if (p->w)	1317	#if EV_USE_EVENTFD
		1318	if (evfd >= 0)
		1319	close (evfd);
		1320	#endif
		1321
		1322	if (evpipe [0] >= 0)
245	{	1323	{
246	p->w->pending = 0;	1324	close (evpipe [0]);
247	p->w->cb (p->w, p->events);	1325	close (evpipe [1]);
248	}	1326	}
249	}	1327	}
250		1328
251	pendingcnt = 0;	1329	#if EV_USE_INOTIFY
252	}	1330	if (fs_fd >= 0)
		1331	close (fs_fd);
		1332	#endif
253		1333
254	static void	1334	if (backend_fd >= 0)
255	timer_reify (void)	1335	close (backend_fd);
		1336
		1337	#if EV_USE_PORT
		1338	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1339	#endif
		1340	#if EV_USE_KQUEUE
		1341	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1342	#endif
		1343	#if EV_USE_EPOLL
		1344	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1345	#endif
		1346	#if EV_USE_POLL
		1347	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1348	#endif
		1349	#if EV_USE_SELECT
		1350	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1351	#endif
		1352
		1353	for (i = NUMPRI; i--; )
		1354	{
		1355	array_free (pending, [i]);
		1356	#if EV_IDLE_ENABLE
		1357	array_free (idle, [i]);
		1358	#endif
		1359	}
		1360
		1361	ev_free (anfds); anfdmax = 0;
		1362
		1363	/* have to use the microsoft-never-gets-it-right macro */
		1364	array_free (fdchange, EMPTY);
		1365	array_free (timer, EMPTY);
		1366	#if EV_PERIODIC_ENABLE
		1367	array_free (periodic, EMPTY);
		1368	#endif
		1369	#if EV_FORK_ENABLE
		1370	array_free (fork, EMPTY);
		1371	#endif
		1372	array_free (prepare, EMPTY);
		1373	array_free (check, EMPTY);
		1374	#if EV_ASYNC_ENABLE
		1375	array_free (async, EMPTY);
		1376	#endif
		1377
		1378	backend = 0;
		1379	}
		1380
		1381	#if EV_USE_INOTIFY
		1382	void inline_size infy_fork (EV_P);
		1383	#endif
		1384
		1385	void inline_size
		1386	loop_fork (EV_P)
256	{	1387	{
257	while (timercnt && timers [0]->at <= ev_now)	1388	#if EV_USE_PORT
		1389	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1390	#endif
		1391	#if EV_USE_KQUEUE
		1392	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1393	#endif
		1394	#if EV_USE_EPOLL
		1395	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1396	#endif
		1397	#if EV_USE_INOTIFY
		1398	infy_fork (EV_A);
		1399	#endif
		1400
		1401	if (ev_is_active (&pipeev))
		1402	{
		1403	/* this "locks" the handlers against writing to the pipe */
		1404	/* while we modify the fd vars */
		1405	gotsig = 1;
		1406	#if EV_ASYNC_ENABLE
		1407	gotasync = 1;
		1408	#endif
		1409
		1410	ev_ref (EV_A);
		1411	ev_io_stop (EV_A_ &pipeev);
		1412
		1413	#if EV_USE_EVENTFD
		1414	if (evfd >= 0)
		1415	close (evfd);
		1416	#endif
		1417
		1418	if (evpipe [0] >= 0)
		1419	{
		1420	close (evpipe [0]);
		1421	close (evpipe [1]);
		1422	}
		1423
		1424	evpipe_init (EV_A);
		1425	/* now iterate over everything, in case we missed something */
		1426	pipecb (EV_A_ &pipeev, EV_READ);
		1427	}
		1428
		1429	postfork = 0;
		1430	}
		1431
		1432	#if EV_MULTIPLICITY
		1433	struct ev_loop *
		1434	ev_loop_new (unsigned int flags)
		1435	{
		1436	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1437
		1438	memset (loop, 0, sizeof (struct ev_loop));
		1439
		1440	loop_init (EV_A_ flags);
		1441
		1442	if (ev_backend (EV_A))
		1443	return loop;
		1444
		1445	return 0;
		1446	}
		1447
		1448	void
		1449	ev_loop_destroy (EV_P)
		1450	{
		1451	loop_destroy (EV_A);
		1452	ev_free (loop);
		1453	}
		1454
		1455	void
		1456	ev_loop_fork (EV_P)
		1457	{
		1458	postfork = 1; /* must be in line with ev_default_fork */
		1459	}
		1460	#endif
		1461
		1462	#if EV_MULTIPLICITY
		1463	struct ev_loop *
		1464	ev_default_loop_init (unsigned int flags)
		1465	#else
		1466	int
		1467	ev_default_loop (unsigned int flags)
		1468	#endif
		1469	{
		1470	if (!ev_default_loop_ptr)
		1471	{
		1472	#if EV_MULTIPLICITY
		1473	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1474	#else
		1475	ev_default_loop_ptr = 1;
		1476	#endif
		1477
		1478	loop_init (EV_A_ flags);
		1479
		1480	if (ev_backend (EV_A))
		1481	{
		1482	#ifndef _WIN32
		1483	ev_signal_init (&childev, childcb, SIGCHLD);
		1484	ev_set_priority (&childev, EV_MAXPRI);
		1485	ev_signal_start (EV_A_ &childev);
		1486	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1487	#endif
		1488	}
		1489	else
		1490	ev_default_loop_ptr = 0;
		1491	}
		1492
		1493	return ev_default_loop_ptr;
		1494	}
		1495
		1496	void
		1497	ev_default_destroy (void)
		1498	{
		1499	#if EV_MULTIPLICITY
		1500	struct ev_loop *loop = ev_default_loop_ptr;
		1501	#endif
		1502
		1503	#ifndef _WIN32
		1504	ev_ref (EV_A); /* child watcher */
		1505	ev_signal_stop (EV_A_ &childev);
		1506	#endif
		1507
		1508	loop_destroy (EV_A);
		1509	}
		1510
		1511	void
		1512	ev_default_fork (void)
		1513	{
		1514	#if EV_MULTIPLICITY
		1515	struct ev_loop *loop = ev_default_loop_ptr;
		1516	#endif
		1517
		1518	if (backend)
		1519	postfork = 1; /* must be in line with ev_loop_fork */
		1520	}
		1521
		1522	/*****************************************************************************/
		1523
		1524	void
		1525	ev_invoke (EV_P_ void *w, int revents)
		1526	{
		1527	EV_CB_INVOKE ((W)w, revents);
		1528	}
		1529
		1530	void inline_speed
		1531	call_pending (EV_P)
		1532	{
		1533	int pri;
		1534
		1535	for (pri = NUMPRI; pri--; )
		1536	while (pendingcnt [pri])
258	{	1537	{
259	struct ev_timer *w = timers [0];	1538	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
260		1539
		1540	if (expect_true (p->w))
		1541	{
		1542	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1543
		1544	p->w->pending = 0;
		1545	EV_CB_INVOKE (p->w, p->events);
		1546	}
		1547	}
		1548	}
		1549
		1550	#if EV_IDLE_ENABLE
		1551	void inline_size
		1552	idle_reify (EV_P)
		1553	{
		1554	if (expect_false (idleall))
		1555	{
		1556	int pri;
		1557
		1558	for (pri = NUMPRI; pri--; )
		1559	{
		1560	if (pendingcnt [pri])
		1561	break;
		1562
		1563	if (idlecnt [pri])
		1564	{
		1565	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1566	break;
		1567	}
		1568	}
		1569	}
		1570	}
		1571	#endif
		1572
		1573	void inline_size
		1574	timers_reify (EV_P)
		1575	{
		1576	while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
		1577	{
		1578	ev_timer *w = (ev_timer *)timers [HEAP0];
		1579
		1580	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1581
261	/* first reschedule timer */	1582	/* first reschedule or stop timer */
262	if (w->repeat)	1583	if (w->repeat)
263	{	1584	{
264	if (w->is_abs)	1585	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;	1586
266	else
267	w->at = ev_now + w->repeat;	1587	ev_at (w) += w->repeat;
		1588	if (ev_at (w) < mn_now)
		1589	ev_at (w) = mn_now;
268		1590
269	downheap (0);	1591	downheap (timers, timercnt, HEAP0);
270	}	1592	}
271	else	1593	else
272	evtimer_stop (w); /* nonrepeating: stop timer */	1594	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
273		1595
274	event ((struct ev_watcher *)w, EV_TIMEOUT);	1596	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1597	}
		1598	}
		1599
		1600	#if EV_PERIODIC_ENABLE
		1601	void inline_size
		1602	periodics_reify (EV_P)
		1603	{
		1604	while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
275	}	1605	{
276	}	1606	ev_periodic *w = (ev_periodic *)periodics [HEAP0];
277		1607
278	int ev_loop_done;	1608	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
279		1609
		1610	/* first reschedule or stop timer */
		1611	if (w->reschedule_cb)
		1612	{
		1613	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1614	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1615	downheap (periodics, periodiccnt, 1);
		1616	}
		1617	else if (w->interval)
		1618	{
		1619	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1620	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1621	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1622	downheap (periodics, periodiccnt, HEAP0);
		1623	}
		1624	else
		1625	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1626
		1627	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1628	}
		1629	}
		1630
		1631	static void noinline
		1632	periodics_reschedule (EV_P)
		1633	{
		1634	int i;
		1635
		1636	/* adjust periodics after time jump */
		1637	for (i = 1; i <= periodiccnt; ++i)
		1638	{
		1639	ev_periodic *w = (ev_periodic *)periodics [i];
		1640
		1641	if (w->reschedule_cb)
		1642	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1643	else if (w->interval)
		1644	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1645	}
		1646
		1647	/* now rebuild the heap */
		1648	for (i = periodiccnt >> 1; --i; )
		1649	downheap (periodics, periodiccnt, i + HEAP0);
		1650	}
		1651	#endif
		1652
		1653	void inline_speed
		1654	time_update (EV_P_ ev_tstamp max_block)
		1655	{
		1656	int i;
		1657
		1658	#if EV_USE_MONOTONIC
		1659	if (expect_true (have_monotonic))
		1660	{
		1661	ev_tstamp odiff = rtmn_diff;
		1662
		1663	mn_now = get_clock ();
		1664
		1665	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1666	/* interpolate in the meantime */
		1667	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1668	{
		1669	ev_rt_now = rtmn_diff + mn_now;
		1670	return;
		1671	}
		1672
		1673	now_floor = mn_now;
		1674	ev_rt_now = ev_time ();
		1675
		1676	/* loop a few times, before making important decisions.
		1677	* on the choice of "4": one iteration isn't enough,
		1678	* in case we get preempted during the calls to
		1679	* ev_time and get_clock. a second call is almost guaranteed
		1680	* to succeed in that case, though. and looping a few more times
		1681	* doesn't hurt either as we only do this on time-jumps or
		1682	* in the unlikely event of having been preempted here.
		1683	*/
		1684	for (i = 4; --i; )
		1685	{
		1686	rtmn_diff = ev_rt_now - mn_now;
		1687
		1688	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1689	return; /* all is well */
		1690
		1691	ev_rt_now = ev_time ();
		1692	mn_now = get_clock ();
		1693	now_floor = mn_now;
		1694	}
		1695
		1696	# if EV_PERIODIC_ENABLE
		1697	periodics_reschedule (EV_A);
		1698	# endif
		1699	/* no timer adjustment, as the monotonic clock doesn't jump */
		1700	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1701	}
		1702	else
		1703	#endif
		1704	{
		1705	ev_rt_now = ev_time ();
		1706
		1707	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1708	{
		1709	#if EV_PERIODIC_ENABLE
		1710	periodics_reschedule (EV_A);
		1711	#endif
		1712	/* adjust timers. this is easy, as the offset is the same for all of them */
		1713	for (i = 1; i <= timercnt; ++i)
		1714	ev_at (timers [i]) += ev_rt_now - mn_now;
		1715	}
		1716
		1717	mn_now = ev_rt_now;
		1718	}
		1719	}
		1720
		1721	void
		1722	ev_ref (EV_P)
		1723	{
		1724	++activecnt;
		1725	}
		1726
		1727	void
		1728	ev_unref (EV_P)
		1729	{
		1730	--activecnt;
		1731	}
		1732
		1733	static int loop_done;
		1734
		1735	void
280	int ev_loop (int flags)	1736	ev_loop (EV_P_ int flags)
281	{	1737	{
282	double block;	1738	loop_done = EVUNLOOP_CANCEL;
283	ev_loop_done = flags & EVLOOP_ONESHOT;	1739
		1740	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
284		1741
285	do	1742	do
286	{	1743	{
		1744	#ifndef _WIN32
		1745	if (expect_false (curpid)) /* penalise the forking check even more */
		1746	if (expect_false (getpid () != curpid))
		1747	{
		1748	curpid = getpid ();
		1749	postfork = 1;
		1750	}
		1751	#endif
		1752
		1753	#if EV_FORK_ENABLE
		1754	/* we might have forked, so queue fork handlers */
		1755	if (expect_false (postfork))
		1756	if (forkcnt)
		1757	{
		1758	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1759	call_pending (EV_A);
		1760	}
		1761	#endif
		1762
		1763	/* queue prepare watchers (and execute them) */
		1764	if (expect_false (preparecnt))
		1765	{
		1766	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1767	call_pending (EV_A);
		1768	}
		1769
		1770	if (expect_false (!activecnt))
		1771	break;
		1772
		1773	/* we might have forked, so reify kernel state if necessary */
		1774	if (expect_false (postfork))
		1775	loop_fork (EV_A);
		1776
287	/* update fd-related kernel structures */	1777	/* update fd-related kernel structures */
288	method_reify (); fdchangecnt = 0;	1778	fd_reify (EV_A);
289		1779
290	/* calculate blocking time */	1780	/* calculate blocking time */
291	ev_now = ev_time ();	1781	{
		1782	ev_tstamp waittime = 0.;
		1783	ev_tstamp sleeptime = 0.;
292		1784
293	if (flags & EVLOOP_NONBLOCK)	1785	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
294	block = 0.;
295	else if (!timercnt)
296	block = MAX_BLOCKTIME;
297	else
298	{	1786	{
299	block = timers [0]->at - ev_now + method_fudge;	1787	/* update time to cancel out callback processing overhead */
300	if (block < 0.) block = 0.;	1788	time_update (EV_A_ 1e100);
301	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;	1789
		1790	waittime = MAX_BLOCKTIME;
		1791
		1792	if (timercnt)
		1793	{
		1794	ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
		1795	if (waittime > to) waittime = to;
		1796	}
		1797
		1798	#if EV_PERIODIC_ENABLE
		1799	if (periodiccnt)
		1800	{
		1801	ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
		1802	if (waittime > to) waittime = to;
		1803	}
		1804	#endif
		1805
		1806	if (expect_false (waittime < timeout_blocktime))
		1807	waittime = timeout_blocktime;
		1808
		1809	sleeptime = waittime - backend_fudge;
		1810
		1811	if (expect_true (sleeptime > io_blocktime))
		1812	sleeptime = io_blocktime;
		1813
		1814	if (sleeptime)
		1815	{
		1816	ev_sleep (sleeptime);
		1817	waittime -= sleeptime;
		1818	}
302	}	1819	}
303		1820
304	method_poll (block);	1821	++loop_count;
		1822	backend_poll (EV_A_ waittime);
305		1823
		1824	/* update ev_rt_now, do magic */
		1825	time_update (EV_A_ waittime + sleeptime);
		1826	}
		1827
306	/* put pending timers into pendign queue and reschedule them */	1828	/* queue pending timers and reschedule them */
		1829	timers_reify (EV_A); /* relative timers called last */
		1830	#if EV_PERIODIC_ENABLE
		1831	periodics_reify (EV_A); /* absolute timers called first */
		1832	#endif
		1833
		1834	#if EV_IDLE_ENABLE
		1835	/* queue idle watchers unless other events are pending */
307	timer_reify ();	1836	idle_reify (EV_A);
		1837	#endif
308		1838
309	ev_now = ev_time ();	1839	/* queue check watchers, to be executed first */
		1840	if (expect_false (checkcnt))
		1841	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1842
310	call_pending ();	1843	call_pending (EV_A);
311	}	1844	}
312	while (!ev_loop_done);	1845	while (expect_true (
313	}	1846	activecnt
		1847	&& !loop_done
		1848	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1849	));
314		1850
315	static void	1851	if (loop_done == EVUNLOOP_ONE)
316	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1852	loop_done = EVUNLOOP_CANCEL;
		1853	}
		1854
		1855	void
		1856	ev_unloop (EV_P_ int how)
		1857	{
		1858	loop_done = how;
		1859	}
		1860
		1861	/*****************************************************************************/
		1862
		1863	void inline_size
		1864	wlist_add (WL *head, WL elem)
317	{	1865	{
318	elem->next = *head;	1866	elem->next = *head;
319	*head = elem;	1867	*head = elem;
320	}	1868	}
321		1869
322	static void	1870	void inline_size
323	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1871	wlist_del (WL *head, WL elem)
324	{	1872	{
325	while (*head)	1873	while (*head)
326	{	1874	{
327	if (*head == elem)	1875	if (*head == elem)
328	{	1876	{
…		…
332		1880
333	head = &(*head)->next;	1881	head = &(*head)->next;
334	}	1882	}
335	}	1883	}
336		1884
		1885	void inline_speed
		1886	clear_pending (EV_P_ W w)
		1887	{
		1888	if (w->pending)
		1889	{
		1890	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1891	w->pending = 0;
		1892	}
		1893	}
		1894
		1895	int
		1896	ev_clear_pending (EV_P_ void *w)
		1897	{
		1898	W w_ = (W)w;
		1899	int pending = w_->pending;
		1900
		1901	if (expect_true (pending))
		1902	{
		1903	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1904	w_->pending = 0;
		1905	p->w = 0;
		1906	return p->events;
		1907	}
		1908	else
		1909	return 0;
		1910	}
		1911
		1912	void inline_size
		1913	pri_adjust (EV_P_ W w)
		1914	{
		1915	int pri = w->priority;
		1916	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1917	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1918	w->priority = pri;
		1919	}
		1920
		1921	void inline_speed
		1922	ev_start (EV_P_ W w, int active)
		1923	{
		1924	pri_adjust (EV_A_ w);
		1925	w->active = active;
		1926	ev_ref (EV_A);
		1927	}
		1928
		1929	void inline_size
		1930	ev_stop (EV_P_ W w)
		1931	{
		1932	ev_unref (EV_A);
		1933	w->active = 0;
		1934	}
		1935
		1936	/*****************************************************************************/
		1937
		1938	void noinline
		1939	ev_io_start (EV_P_ ev_io *w)
		1940	{
		1941	int fd = w->fd;
		1942
		1943	if (expect_false (ev_is_active (w)))
		1944	return;
		1945
		1946	assert (("ev_io_start called with negative fd", fd >= 0));
		1947
		1948	ev_start (EV_A_ (W)w, 1);
		1949	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1950	wlist_add (&anfds[fd].head, (WL)w);
		1951
		1952	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1953	w->events &= ~EV_IOFDSET;
		1954	}
		1955
		1956	void noinline
		1957	ev_io_stop (EV_P_ ev_io *w)
		1958	{
		1959	clear_pending (EV_A_ (W)w);
		1960	if (expect_false (!ev_is_active (w)))
		1961	return;
		1962
		1963	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1964
		1965	wlist_del (&anfds[w->fd].head, (WL)w);
		1966	ev_stop (EV_A_ (W)w);
		1967
		1968	fd_change (EV_A_ w->fd, 1);
		1969	}
		1970
		1971	void noinline
		1972	ev_timer_start (EV_P_ ev_timer *w)
		1973	{
		1974	if (expect_false (ev_is_active (w)))
		1975	return;
		1976
		1977	ev_at (w) += mn_now;
		1978
		1979	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1980
		1981	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
		1982	array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
		1983	timers [ev_active (w)] = (WT)w;
		1984	upheap (timers, ev_active (w));
		1985
		1986	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		1987	}
		1988
		1989	void noinline
		1990	ev_timer_stop (EV_P_ ev_timer *w)
		1991	{
		1992	clear_pending (EV_A_ (W)w);
		1993	if (expect_false (!ev_is_active (w)))
		1994	return;
		1995
		1996	{
		1997	int active = ev_active (w);
		1998
		1999	assert (("internal timer heap corruption", timers [active] == (WT)w));
		2000
		2001	if (expect_true (active < timercnt + HEAP0 - 1))
		2002	{
		2003	timers [active] = timers [timercnt + HEAP0 - 1];
		2004	adjustheap (timers, timercnt, active);
		2005	}
		2006
		2007	--timercnt;
		2008	}
		2009
		2010	ev_at (w) -= mn_now;
		2011
		2012	ev_stop (EV_A_ (W)w);
		2013	}
		2014
		2015	void noinline
		2016	ev_timer_again (EV_P_ ev_timer *w)
		2017	{
		2018	if (ev_is_active (w))
		2019	{
		2020	if (w->repeat)
		2021	{
		2022	ev_at (w) = mn_now + w->repeat;
		2023	adjustheap (timers, timercnt, ev_active (w));
		2024	}
		2025	else
		2026	ev_timer_stop (EV_A_ w);
		2027	}
		2028	else if (w->repeat)
		2029	{
		2030	ev_at (w) = w->repeat;
		2031	ev_timer_start (EV_A_ w);
		2032	}
		2033	}
		2034
		2035	#if EV_PERIODIC_ENABLE
		2036	void noinline
		2037	ev_periodic_start (EV_P_ ev_periodic *w)
		2038	{
		2039	if (expect_false (ev_is_active (w)))
		2040	return;
		2041
		2042	if (w->reschedule_cb)
		2043	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2044	else if (w->interval)
		2045	{
		2046	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		2047	/* this formula differs from the one in periodic_reify because we do not always round up */
		2048	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2049	}
		2050	else
		2051	ev_at (w) = w->offset;
		2052
		2053	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
		2054	array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
		2055	periodics [ev_active (w)] = (WT)w;
		2056	upheap (periodics, ev_active (w));
		2057
		2058	/*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
		2059	}
		2060
		2061	void noinline
		2062	ev_periodic_stop (EV_P_ ev_periodic *w)
		2063	{
		2064	clear_pending (EV_A_ (W)w);
		2065	if (expect_false (!ev_is_active (w)))
		2066	return;
		2067
		2068	{
		2069	int active = ev_active (w);
		2070
		2071	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		2072
		2073	if (expect_true (active < periodiccnt + HEAP0 - 1))
		2074	{
		2075	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
		2076	adjustheap (periodics, periodiccnt, active);
		2077	}
		2078
		2079	--periodiccnt;
		2080	}
		2081
		2082	ev_stop (EV_A_ (W)w);
		2083	}
		2084
		2085	void noinline
		2086	ev_periodic_again (EV_P_ ev_periodic *w)
		2087	{
		2088	/* TODO: use adjustheap and recalculation */
		2089	ev_periodic_stop (EV_A_ w);
		2090	ev_periodic_start (EV_A_ w);
		2091	}
		2092	#endif
		2093
		2094	#ifndef SA_RESTART
		2095	# define SA_RESTART 0
		2096	#endif
		2097
		2098	void noinline
		2099	ev_signal_start (EV_P_ ev_signal *w)
		2100	{
		2101	#if EV_MULTIPLICITY
		2102	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2103	#endif
		2104	if (expect_false (ev_is_active (w)))
		2105	return;
		2106
		2107	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2108
		2109	evpipe_init (EV_A);
		2110
		2111	{
		2112	#ifndef _WIN32
		2113	sigset_t full, prev;
		2114	sigfillset (&full);
		2115	sigprocmask (SIG_SETMASK, &full, &prev);
		2116	#endif
		2117
		2118	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2119
		2120	#ifndef _WIN32
		2121	sigprocmask (SIG_SETMASK, &prev, 0);
		2122	#endif
		2123	}
		2124
		2125	ev_start (EV_A_ (W)w, 1);
		2126	wlist_add (&signals [w->signum - 1].head, (WL)w);
		2127
		2128	if (!((WL)w)->next)
		2129	{
		2130	#if _WIN32
		2131	signal (w->signum, ev_sighandler);
		2132	#else
		2133	struct sigaction sa;
		2134	sa.sa_handler = ev_sighandler;
		2135	sigfillset (&sa.sa_mask);
		2136	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		2137	sigaction (w->signum, &sa, 0);
		2138	#endif
		2139	}
		2140	}
		2141
		2142	void noinline
		2143	ev_signal_stop (EV_P_ ev_signal *w)
		2144	{
		2145	clear_pending (EV_A_ (W)w);
		2146	if (expect_false (!ev_is_active (w)))
		2147	return;
		2148
		2149	wlist_del (&signals [w->signum - 1].head, (WL)w);
		2150	ev_stop (EV_A_ (W)w);
		2151
		2152	if (!signals [w->signum - 1].head)
		2153	signal (w->signum, SIG_DFL);
		2154	}
		2155
		2156	void
		2157	ev_child_start (EV_P_ ev_child *w)
		2158	{
		2159	#if EV_MULTIPLICITY
		2160	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2161	#endif
		2162	if (expect_false (ev_is_active (w)))
		2163	return;
		2164
		2165	ev_start (EV_A_ (W)w, 1);
		2166	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2167	}
		2168
		2169	void
		2170	ev_child_stop (EV_P_ ev_child *w)
		2171	{
		2172	clear_pending (EV_A_ (W)w);
		2173	if (expect_false (!ev_is_active (w)))
		2174	return;
		2175
		2176	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2177	ev_stop (EV_A_ (W)w);
		2178	}
		2179
		2180	#if EV_STAT_ENABLE
		2181
		2182	# ifdef _WIN32
		2183	# undef lstat
		2184	# define lstat(a,b) _stati64 (a,b)
		2185	# endif
		2186
		2187	#define DEF_STAT_INTERVAL 5.0074891
		2188	#define MIN_STAT_INTERVAL 0.1074891
		2189
		2190	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2191
		2192	#if EV_USE_INOTIFY
		2193	# define EV_INOTIFY_BUFSIZE 8192
		2194
		2195	static void noinline
		2196	infy_add (EV_P_ ev_stat *w)
		2197	{
		2198	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);
		2199
		2200	if (w->wd < 0)
		2201	{
		2202	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2203
		2204	/* monitor some parent directory for speedup hints */
		2205	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2206	/* but an efficiency issue only */
		2207	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2208	{
		2209	char path [4096];
		2210	strcpy (path, w->path);
		2211
		2212	do
		2213	{
		2214	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2215	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2216
		2217	char *pend = strrchr (path, '/');
		2218
		2219	if (!pend)
		2220	break; /* whoops, no '/', complain to your admin */
		2221
		2222	*pend = 0;
		2223	w->wd = inotify_add_watch (fs_fd, path, mask);
		2224	}
		2225	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2226	}
		2227	}
		2228	else
		2229	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2230
		2231	if (w->wd >= 0)
		2232	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2233	}
		2234
		2235	static void noinline
		2236	infy_del (EV_P_ ev_stat *w)
		2237	{
		2238	int slot;
		2239	int wd = w->wd;
		2240
		2241	if (wd < 0)
		2242	return;
		2243
		2244	w->wd = -2;
		2245	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2246	wlist_del (&fs_hash [slot].head, (WL)w);
		2247
		2248	/* remove this watcher, if others are watching it, they will rearm */
		2249	inotify_rm_watch (fs_fd, wd);
		2250	}
		2251
		2252	static void noinline
		2253	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2254	{
		2255	if (slot < 0)
		2256	/* overflow, need to check for all hahs slots */
		2257	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2258	infy_wd (EV_A_ slot, wd, ev);
		2259	else
		2260	{
		2261	WL w_;
		2262
		2263	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2264	{
		2265	ev_stat *w = (ev_stat *)w_;
		2266	w_ = w_->next; /* lets us remove this watcher and all before it */
		2267
		2268	if (w->wd == wd || wd == -1)
		2269	{
		2270	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2271	{
		2272	w->wd = -1;
		2273	infy_add (EV_A_ w); /* re-add, no matter what */
		2274	}
		2275
		2276	stat_timer_cb (EV_A_ &w->timer, 0);
		2277	}
		2278	}
		2279	}
		2280	}
		2281
337	static void	2282	static void
338	ev_start (struct ev_watcher *w, int active)	2283	infy_cb (EV_P_ ev_io *w, int revents)
339	{	2284	{
340	w->pending = 0;	2285	char buf [EV_INOTIFY_BUFSIZE];
341	w->active = active;	2286	struct inotify_event *ev = (struct inotify_event *)buf;
		2287	int ofs;
		2288	int len = read (fs_fd, buf, sizeof (buf));
		2289
		2290	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2291	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2292	}
		2293
		2294	void inline_size
		2295	infy_init (EV_P)
		2296	{
		2297	if (fs_fd != -2)
		2298	return;
		2299
		2300	fs_fd = inotify_init ();
		2301
		2302	if (fs_fd >= 0)
		2303	{
		2304	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2305	ev_set_priority (&fs_w, EV_MAXPRI);
		2306	ev_io_start (EV_A_ &fs_w);
		2307	}
		2308	}
		2309
		2310	void inline_size
		2311	infy_fork (EV_P)
		2312	{
		2313	int slot;
		2314
		2315	if (fs_fd < 0)
		2316	return;
		2317
		2318	close (fs_fd);
		2319	fs_fd = inotify_init ();
		2320
		2321	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2322	{
		2323	WL w_ = fs_hash [slot].head;
		2324	fs_hash [slot].head = 0;
		2325
		2326	while (w_)
		2327	{
		2328	ev_stat *w = (ev_stat *)w_;
		2329	w_ = w_->next; /* lets us add this watcher */
		2330
		2331	w->wd = -1;
		2332
		2333	if (fs_fd >= 0)
		2334	infy_add (EV_A_ w); /* re-add, no matter what */
		2335	else
		2336	ev_timer_start (EV_A_ &w->timer);
		2337	}
		2338
		2339	}
		2340	}
		2341
		2342	#endif
		2343
		2344	void
		2345	ev_stat_stat (EV_P_ ev_stat *w)
		2346	{
		2347	if (lstat (w->path, &w->attr) < 0)
		2348	w->attr.st_nlink = 0;
		2349	else if (!w->attr.st_nlink)
		2350	w->attr.st_nlink = 1;
		2351	}
		2352
		2353	static void noinline
		2354	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2355	{
		2356	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2357
		2358	/* we copy this here each the time so that */
		2359	/* prev has the old value when the callback gets invoked */
		2360	w->prev = w->attr;
		2361	ev_stat_stat (EV_A_ w);
		2362
		2363	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2364	if (
		2365	w->prev.st_dev != w->attr.st_dev
		2366	|| w->prev.st_ino != w->attr.st_ino
		2367	|| w->prev.st_mode != w->attr.st_mode
		2368	|| w->prev.st_nlink != w->attr.st_nlink
		2369	|| w->prev.st_uid != w->attr.st_uid
		2370	|| w->prev.st_gid != w->attr.st_gid
		2371	|| w->prev.st_rdev != w->attr.st_rdev
		2372	|| w->prev.st_size != w->attr.st_size
		2373	|| w->prev.st_atime != w->attr.st_atime
		2374	|| w->prev.st_mtime != w->attr.st_mtime
		2375	|| w->prev.st_ctime != w->attr.st_ctime
		2376	) {
		2377	#if EV_USE_INOTIFY
		2378	infy_del (EV_A_ w);
		2379	infy_add (EV_A_ w);
		2380	ev_stat_stat (EV_A_ w); /* avoid race... */
		2381	#endif
		2382
		2383	ev_feed_event (EV_A_ w, EV_STAT);
		2384	}
		2385	}
		2386
		2387	void
		2388	ev_stat_start (EV_P_ ev_stat *w)
		2389	{
		2390	if (expect_false (ev_is_active (w)))
		2391	return;
		2392
		2393	/* since we use memcmp, we need to clear any padding data etc. */
		2394	memset (&w->prev, 0, sizeof (ev_statdata));
		2395	memset (&w->attr, 0, sizeof (ev_statdata));
		2396
		2397	ev_stat_stat (EV_A_ w);
		2398
		2399	if (w->interval < MIN_STAT_INTERVAL)
		2400	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2401
		2402	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2403	ev_set_priority (&w->timer, ev_priority (w));
		2404
		2405	#if EV_USE_INOTIFY
		2406	infy_init (EV_A);
		2407
		2408	if (fs_fd >= 0)
		2409	infy_add (EV_A_ w);
		2410	else
		2411	#endif
		2412	ev_timer_start (EV_A_ &w->timer);
		2413
		2414	ev_start (EV_A_ (W)w, 1);
		2415	}
		2416
		2417	void
		2418	ev_stat_stop (EV_P_ ev_stat *w)
		2419	{
		2420	clear_pending (EV_A_ (W)w);
		2421	if (expect_false (!ev_is_active (w)))
		2422	return;
		2423
		2424	#if EV_USE_INOTIFY
		2425	infy_del (EV_A_ w);
		2426	#endif
		2427	ev_timer_stop (EV_A_ &w->timer);
		2428
		2429	ev_stop (EV_A_ (W)w);
		2430	}
		2431	#endif
		2432
		2433	#if EV_IDLE_ENABLE
		2434	void
		2435	ev_idle_start (EV_P_ ev_idle *w)
		2436	{
		2437	if (expect_false (ev_is_active (w)))
		2438	return;
		2439
		2440	pri_adjust (EV_A_ (W)w);
		2441
		2442	{
		2443	int active = ++idlecnt [ABSPRI (w)];
		2444
		2445	++idleall;
		2446	ev_start (EV_A_ (W)w, active);
		2447
		2448	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2449	idles [ABSPRI (w)][active - 1] = w;
		2450	}
		2451	}
		2452
		2453	void
		2454	ev_idle_stop (EV_P_ ev_idle *w)
		2455	{
		2456	clear_pending (EV_A_ (W)w);
		2457	if (expect_false (!ev_is_active (w)))
		2458	return;
		2459
		2460	{
		2461	int active = ev_active (w);
		2462
		2463	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2464	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2465
		2466	ev_stop (EV_A_ (W)w);
		2467	--idleall;
		2468	}
		2469	}
		2470	#endif
		2471
		2472	void
		2473	ev_prepare_start (EV_P_ ev_prepare *w)
		2474	{
		2475	if (expect_false (ev_is_active (w)))
		2476	return;
		2477
		2478	ev_start (EV_A_ (W)w, ++preparecnt);
		2479	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2480	prepares [preparecnt - 1] = w;
		2481	}
		2482
		2483	void
		2484	ev_prepare_stop (EV_P_ ev_prepare *w)
		2485	{
		2486	clear_pending (EV_A_ (W)w);
		2487	if (expect_false (!ev_is_active (w)))
		2488	return;
		2489
		2490	{
		2491	int active = ev_active (w);
		2492
		2493	prepares [active - 1] = prepares [--preparecnt];
		2494	ev_active (prepares [active - 1]) = active;
		2495	}
		2496
		2497	ev_stop (EV_A_ (W)w);
		2498	}
		2499
		2500	void
		2501	ev_check_start (EV_P_ ev_check *w)
		2502	{
		2503	if (expect_false (ev_is_active (w)))
		2504	return;
		2505
		2506	ev_start (EV_A_ (W)w, ++checkcnt);
		2507	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2508	checks [checkcnt - 1] = w;
		2509	}
		2510
		2511	void
		2512	ev_check_stop (EV_P_ ev_check *w)
		2513	{
		2514	clear_pending (EV_A_ (W)w);
		2515	if (expect_false (!ev_is_active (w)))
		2516	return;
		2517
		2518	{
		2519	int active = ev_active (w);
		2520
		2521	checks [active - 1] = checks [--checkcnt];
		2522	ev_active (checks [active - 1]) = active;
		2523	}
		2524
		2525	ev_stop (EV_A_ (W)w);
		2526	}
		2527
		2528	#if EV_EMBED_ENABLE
		2529	void noinline
		2530	ev_embed_sweep (EV_P_ ev_embed *w)
		2531	{
		2532	ev_loop (w->other, EVLOOP_NONBLOCK);
342	}	2533	}
343		2534
344	static void	2535	static void
345	ev_stop (struct ev_watcher *w)	2536	embed_io_cb (EV_P_ ev_io *io, int revents)
346	{	2537	{
347	if (w->pending)	2538	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
348	pendings [w->pending - 1].w = 0;
349		2539
350	w->active = 0;
351	/* nop */
352	}
353
354	void
355	evio_start (struct ev_io *w)
356	{
357	if (ev_is_active (w))	2540	if (ev_cb (w))
		2541	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2542	else
		2543	ev_loop (w->other, EVLOOP_NONBLOCK);
		2544	}
		2545
		2546	static void
		2547	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2548	{
		2549	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2550
		2551	{
		2552	struct ev_loop *loop = w->other;
		2553
		2554	while (fdchangecnt)
		2555	{
		2556	fd_reify (EV_A);
		2557	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2558	}
		2559	}
		2560	}
		2561
		2562	#if 0
		2563	static void
		2564	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2565	{
		2566	ev_idle_stop (EV_A_ idle);
		2567	}
		2568	#endif
		2569
		2570	void
		2571	ev_embed_start (EV_P_ ev_embed *w)
		2572	{
		2573	if (expect_false (ev_is_active (w)))
358	return;	2574	return;
359		2575
360	int fd = w->fd;	2576	{
		2577	struct ev_loop *loop = w->other;
		2578	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2579	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2580	}
361		2581
362	ev_start ((struct ev_watcher *)w, 1);	2582	ev_set_priority (&w->io, ev_priority (w));
363	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	2583	ev_io_start (EV_A_ &w->io);
364	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
365		2584
366	++fdchangecnt;	2585	ev_prepare_init (&w->prepare, embed_prepare_cb);
367	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	2586	ev_set_priority (&w->prepare, EV_MINPRI);
368	fdchanges [fdchangecnt - 1] = fd;	2587	ev_prepare_start (EV_A_ &w->prepare);
369	}
370		2588
		2589	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2590
		2591	ev_start (EV_A_ (W)w, 1);
		2592	}
		2593
371	void	2594	void
372	evio_stop (struct ev_io *w)	2595	ev_embed_stop (EV_P_ ev_embed *w)
373	{	2596	{
		2597	clear_pending (EV_A_ (W)w);
374	if (!ev_is_active (w))	2598	if (expect_false (!ev_is_active (w)))
375	return;	2599	return;
376		2600
377	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	2601	ev_io_stop (EV_A_ &w->io);
378	ev_stop ((struct ev_watcher *)w);	2602	ev_prepare_stop (EV_A_ &w->prepare);
379		2603
380	++fdchangecnt;	2604	ev_stop (EV_A_ (W)w);
381	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
382	fdchanges [fdchangecnt - 1] = w->fd;
383	}	2605	}
		2606	#endif
384		2607
		2608	#if EV_FORK_ENABLE
385	void	2609	void
386	evtimer_start (struct ev_timer *w)	2610	ev_fork_start (EV_P_ ev_fork *w)
387	{	2611	{
388	if (ev_is_active (w))	2612	if (expect_false (ev_is_active (w)))
389	return;	2613	return;
390		2614
391	if (w->is_abs)	2615	ev_start (EV_A_ (W)w, ++forkcnt);
392	{	2616	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
393	/* this formula differs from the one in timer_reify becuse we do not round up */	2617	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	}	2618	}
405		2619
406	void	2620	void
407	evtimer_stop (struct ev_timer *w)	2621	ev_fork_stop (EV_P_ ev_fork *w)
408	{	2622	{
		2623	clear_pending (EV_A_ (W)w);
409	if (!ev_is_active (w))	2624	if (expect_false (!ev_is_active (w)))
410	return;	2625	return;
411		2626
412	if (w->active < timercnt--)
413	{	2627	{
414	timers [w->active - 1] = timers [timercnt];	2628	int active = ev_active (w);
415	downheap (w->active - 1);	2629
		2630	forks [active - 1] = forks [--forkcnt];
		2631	ev_active (forks [active - 1]) = active;
416	}	2632	}
417		2633
418	ev_stop ((struct ev_watcher *)w);	2634	ev_stop (EV_A_ (W)w);
419	}	2635	}
		2636	#endif
420		2637
		2638	#if EV_ASYNC_ENABLE
421	void	2639	void
422	evsignal_start (struct ev_signal *w)	2640	ev_async_start (EV_P_ ev_async *w)
423	{	2641	{
424	if (ev_is_active (w))	2642	if (expect_false (ev_is_active (w)))
425	return;	2643	return;
426		2644
427	ev_start ((struct ev_watcher *)w, 1);	2645	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		2646
		2647	ev_start (EV_A_ (W)w, ++asynccnt);
		2648	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2649	asyncs [asynccnt - 1] = w;
		2650	}
		2651
432	void	2652	void
433	evsignal_stop (struct ev_signal *w)	2653	ev_async_stop (EV_P_ ev_async *w)
434	{	2654	{
		2655	clear_pending (EV_A_ (W)w);
435	if (!ev_is_active (w))	2656	if (expect_false (!ev_is_active (w)))
436	return;	2657	return;
437		2658
438	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2659	{
439	ev_stop ((struct ev_watcher *)w);	2660	int active = ev_active (w);
		2661
		2662	asyncs [active - 1] = asyncs [--asynccnt];
		2663	ev_active (asyncs [active - 1]) = active;
		2664	}
		2665
		2666	ev_stop (EV_A_ (W)w);
440	}	2667	}
		2668
		2669	void
		2670	ev_async_send (EV_P_ ev_async *w)
		2671	{
		2672	w->sent = 1;
		2673	evpipe_write (EV_A_ &gotasync);
		2674	}
		2675	#endif
441		2676
442	/*****************************************************************************/	2677	/*****************************************************************************/
443	#if 1	2678
		2679	struct ev_once
		2680	{
		2681	ev_io io;
		2682	ev_timer to;
		2683	void (*cb)(int revents, void *arg);
		2684	void *arg;
		2685	};
444		2686
445	static void	2687	static void
446	sin_cb (struct ev_io *w, int revents)	2688	once_cb (EV_P_ struct ev_once *once, int revents)
447	{	2689	{
448	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2690	void (*cb)(int revents, void *arg) = once->cb;
		2691	void *arg = once->arg;
		2692
		2693	ev_io_stop (EV_A_ &once->io);
		2694	ev_timer_stop (EV_A_ &once->to);
		2695	ev_free (once);
		2696
		2697	cb (revents, arg);
449	}	2698	}
450		2699
451	static void	2700	static void
		2701	once_cb_io (EV_P_ ev_io *w, int revents)
		2702	{
		2703	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2704	}
		2705
		2706	static void
452	ocb (struct ev_timer *w, int revents)	2707	once_cb_to (EV_P_ ev_timer *w, int revents)
453	{	2708	{
454	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2709	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
455	}	2710	}
456		2711
457	int main (void)	2712	void
		2713	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
458	{	2714	{
459	struct ev_io sin;	2715	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
460		2716
461	ev_init (0);	2717	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	}	2718	{
479		2719	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
480	ev_loop (0);
481
482	return 0;	2720	return;
483	}	2721	}
484		2722
485	#endif	2723	once->cb = cb;
		2724	once->arg = arg;
486		2725
		2726	ev_init (&once->io, once_cb_io);
		2727	if (fd >= 0)
		2728	{
		2729	ev_io_set (&once->io, fd, events);
		2730	ev_io_start (EV_A_ &once->io);
		2731	}
487		2732
		2733	ev_init (&once->to, once_cb_to);
		2734	if (timeout >= 0.)
		2735	{
		2736	ev_timer_set (&once->to, timeout, 0.);
		2737	ev_timer_start (EV_A_ &once->to);
		2738	}
		2739	}
488		2740
		2741	#if EV_MULTIPLICITY
		2742	#include "ev_wrap.h"
		2743	#endif
489		2744
		2745	#ifdef __cplusplus
		2746	}
		2747	#endif
		2748

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