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Comparing libev/ev.c (file contents):
Revision 1.4 by root, Tue Oct 30 23:10:33 2007 UTC vs.
Revision 1.211 by root, Tue Feb 19 17:09:28 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	#ifndef EV_STANDALONE
		45	# ifdef EV_CONFIG_H
		46	# include EV_CONFIG_H
		47	# else
		48	# include "config.h"
		49	# endif
		50
		51	# if HAVE_CLOCK_GETTIME
		52	# ifndef EV_USE_MONOTONIC
		53	# define EV_USE_MONOTONIC 1
		54	# endif
		55	# ifndef EV_USE_REALTIME
		56	# define EV_USE_REALTIME 1
		57	# endif
		58	# else
		59	# ifndef EV_USE_MONOTONIC
		60	# define EV_USE_MONOTONIC 0
		61	# endif
		62	# ifndef EV_USE_REALTIME
		63	# define EV_USE_REALTIME 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_NANOSLEEP
		68	# if HAVE_NANOSLEEP
		69	# define EV_USE_NANOSLEEP 1
		70	# else
		71	# define EV_USE_NANOSLEEP 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_SELECT
		76	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		77	# define EV_USE_SELECT 1
		78	# else
		79	# define EV_USE_SELECT 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_POLL
		84	# if HAVE_POLL && HAVE_POLL_H
		85	# define EV_USE_POLL 1
		86	# else
		87	# define EV_USE_POLL 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_EPOLL
		92	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		93	# define EV_USE_EPOLL 1
		94	# else
		95	# define EV_USE_EPOLL 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_KQUEUE
		100	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		101	# define EV_USE_KQUEUE 1
		102	# else
		103	# define EV_USE_KQUEUE 0
		104	# endif
		105	# endif
		106
		107	# ifndef EV_USE_PORT
		108	# if HAVE_PORT_H && HAVE_PORT_CREATE
		109	# define EV_USE_PORT 1
		110	# else
		111	# define EV_USE_PORT 0
		112	# endif
		113	# endif
		114
		115	# ifndef EV_USE_INOTIFY
		116	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		117	# define EV_USE_INOTIFY 1
		118	# else
		119	# define EV_USE_INOTIFY 0
		120	# endif
		121	# endif
		122
		123	#endif
		124
1	#include <math.h>	125	#include <math.h>
2	#include <stdlib.h>	126	#include <stdlib.h>
		127	#include <fcntl.h>
		128	#include <stddef.h>
3		129
4	#include <stdio.h>	130	#include <stdio.h>
5		131
6	#include <assert.h>	132	#include <assert.h>
7	#include <errno.h>	133	#include <errno.h>
8	#include <sys/time.h>	134	#include <sys/types.h>
9	#include <time.h>	135	#include <time.h>
10		136
		137	#include <signal.h>
		138
		139	#ifdef EV_H
		140	# include EV_H
		141	#else
		142	# include "ev.h"
		143	#endif
		144
		145	#ifndef _WIN32
		146	# include <sys/time.h>
		147	# include <sys/wait.h>
		148	# include <unistd.h>
		149	#else
		150	# define WIN32_LEAN_AND_MEAN
		151	# include <windows.h>
		152	# ifndef EV_SELECT_IS_WINSOCKET
		153	# define EV_SELECT_IS_WINSOCKET 1
		154	# endif
		155	#endif
		156
		157	/**/
		158
		159	#ifndef EV_USE_MONOTONIC
		160	# define EV_USE_MONOTONIC 0
		161	#endif
		162
		163	#ifndef EV_USE_REALTIME
		164	# define EV_USE_REALTIME 0
		165	#endif
		166
		167	#ifndef EV_USE_NANOSLEEP
		168	# define EV_USE_NANOSLEEP 0
		169	#endif
		170
		171	#ifndef EV_USE_SELECT
		172	# define EV_USE_SELECT 1
		173	#endif
		174
		175	#ifndef EV_USE_POLL
		176	# ifdef _WIN32
		177	# define EV_USE_POLL 0
		178	# else
		179	# define EV_USE_POLL 1
		180	# endif
		181	#endif
		182
		183	#ifndef EV_USE_EPOLL
		184	# define EV_USE_EPOLL 0
		185	#endif
		186
		187	#ifndef EV_USE_KQUEUE
		188	# define EV_USE_KQUEUE 0
		189	#endif
		190
		191	#ifndef EV_USE_PORT
		192	# define EV_USE_PORT 0
		193	#endif
		194
		195	#ifndef EV_USE_INOTIFY
		196	# define EV_USE_INOTIFY 0
		197	#endif
		198
		199	#ifndef EV_PID_HASHSIZE
		200	# if EV_MINIMAL
		201	# define EV_PID_HASHSIZE 1
		202	# else
		203	# define EV_PID_HASHSIZE 16
		204	# endif
		205	#endif
		206
		207	#ifndef EV_INOTIFY_HASHSIZE
		208	# if EV_MINIMAL
		209	# define EV_INOTIFY_HASHSIZE 1
		210	# else
		211	# define EV_INOTIFY_HASHSIZE 16
		212	# endif
		213	#endif
		214
		215	/**/
		216
11	#ifdef CLOCK_MONOTONIC	217	#ifndef CLOCK_MONOTONIC
		218	# undef EV_USE_MONOTONIC
12	# define HAVE_MONOTONIC 1	219	# define EV_USE_MONOTONIC 0
		220	#endif
		221
		222	#ifndef CLOCK_REALTIME
		223	# undef EV_USE_REALTIME
		224	# define EV_USE_REALTIME 0
		225	#endif
		226
		227	#if !EV_STAT_ENABLE
		228	# undef EV_USE_INOTIFY
		229	# define EV_USE_INOTIFY 0
		230	#endif
		231
		232	#if !EV_USE_NANOSLEEP
		233	# ifndef _WIN32
		234	# include <sys/select.h>
13	#endif	235	# endif
		236	#endif
14		237
15	#define HAVE_EPOLL 1	238	#if EV_USE_INOTIFY
16	#define HAVE_REALTIME 1	239	# include <sys/inotify.h>
17	#define HAVE_SELECT 0	240	#endif
		241
		242	#if EV_SELECT_IS_WINSOCKET
		243	# include <winsock.h>
		244	#endif
		245
		246	/**/
		247
		248	/*
		249	* This is used to avoid floating point rounding problems.
		250	* It is added to ev_rt_now when scheduling periodics
		251	* to ensure progress, time-wise, even when rounding
		252	* errors are against us.
		253	* This value is good at least till the year 4000.
		254	* Better solutions welcome.
		255	*/
		256	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
18		257
19	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	258	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
20	#define MAX_BLOCKTIME 60.	259	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		260	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
21		261
		262	#if __GNUC__ >= 4
		263	# define expect(expr,value) __builtin_expect ((expr),(value))
		264	# define noinline __attribute__ ((noinline))
		265	#else
		266	# define expect(expr,value) (expr)
		267	# define noinline
		268	# if __STDC_VERSION__ < 199901L
		269	# define inline
		270	# endif
		271	#endif
		272
		273	#define expect_false(expr) expect ((expr) != 0, 0)
		274	#define expect_true(expr) expect ((expr) != 0, 1)
		275	#define inline_size static inline
		276
		277	#if EV_MINIMAL
		278	# define inline_speed static noinline
		279	#else
		280	# define inline_speed static inline
		281	#endif
		282
		283	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		284	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		285
		286	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		287	#define EMPTY2(a,b) /* used to suppress some warnings */
		288
		289	typedef ev_watcher *W;
		290	typedef ev_watcher_list *WL;
		291	typedef ev_watcher_time *WT;
		292
		293	#if EV_USE_MONOTONIC
		294	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		295	/* giving it a reasonably high chance of working on typical architetcures */
		296	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		297	#endif
		298
		299	#ifdef _WIN32
		300	# include "ev_win32.c"
		301	#endif
		302
		303	/*****************************************************************************/
		304
		305	static void (*syserr_cb)(const char *msg);
		306
		307	void
		308	ev_set_syserr_cb (void (*cb)(const char *msg))
		309	{
		310	syserr_cb = cb;
		311	}
		312
		313	static void noinline
		314	syserr (const char *msg)
		315	{
		316	if (!msg)
		317	msg = "(libev) system error";
		318
		319	if (syserr_cb)
		320	syserr_cb (msg);
		321	else
		322	{
		323	perror (msg);
		324	abort ();
		325	}
		326	}
		327
		328	static void *(*alloc)(void *ptr, long size);
		329
		330	void
		331	ev_set_allocator (void *(*cb)(void *ptr, long size))
		332	{
		333	alloc = cb;
		334	}
		335
		336	inline_speed void *
		337	ev_realloc (void *ptr, long size)
		338	{
		339	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		340
		341	if (!ptr && size)
		342	{
		343	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		344	abort ();
		345	}
		346
		347	return ptr;
		348	}
		349
		350	#define ev_malloc(size) ev_realloc (0, (size))
		351	#define ev_free(ptr) ev_realloc ((ptr), 0)
		352
		353	/*****************************************************************************/
		354
		355	typedef struct
		356	{
		357	WL head;
		358	unsigned char events;
		359	unsigned char reify;
		360	#if EV_SELECT_IS_WINSOCKET
		361	SOCKET handle;
		362	#endif
		363	} ANFD;
		364
		365	typedef struct
		366	{
		367	W w;
		368	int events;
		369	} ANPENDING;
		370
		371	#if EV_USE_INOTIFY
		372	typedef struct
		373	{
		374	WL head;
		375	} ANFS;
		376	#endif
		377
		378	#if EV_MULTIPLICITY
		379
		380	struct ev_loop
		381	{
		382	ev_tstamp ev_rt_now;
		383	#define ev_rt_now ((loop)->ev_rt_now)
		384	#define VAR(name,decl) decl;
		385	#include "ev_vars.h"
		386	#undef VAR
		387	};
22	#include "ev.h"	388	#include "ev_wrap.h"
23		389
24	struct ev_watcher {	390	static struct ev_loop default_loop_struct;
25	EV_WATCHER (ev_watcher);	391	struct ev_loop *ev_default_loop_ptr;
26	};
27		392
28	struct ev_watcher_list {	393	#else
29	EV_WATCHER_LIST (ev_watcher_list);
30	};
31		394
32	static ev_tstamp now, diff; /* monotonic clock */
33	ev_tstamp ev_now;	395	ev_tstamp ev_rt_now;
34	int ev_method;	396	#define VAR(name,decl) static decl;
		397	#include "ev_vars.h"
		398	#undef VAR
35		399
36	static int have_monotonic; /* runtime */	400	static int ev_default_loop_ptr;
37		401
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	402	#endif
39	static void (*method_reify)(void);	403
40	static void (*method_poll)(ev_tstamp timeout);	404	/*****************************************************************************/
41		405
42	ev_tstamp	406	ev_tstamp
43	ev_time (void)	407	ev_time (void)
44	{	408	{
45	#if HAVE_REALTIME	409	#if EV_USE_REALTIME
46	struct timespec ts;	410	struct timespec ts;
47	clock_gettime (CLOCK_REALTIME, &ts);	411	clock_gettime (CLOCK_REALTIME, &ts);
48	return ts.tv_sec + ts.tv_nsec * 1e-9;	412	return ts.tv_sec + ts.tv_nsec * 1e-9;
49	#else	413	#else
50	struct timeval tv;	414	struct timeval tv;
51	gettimeofday (&tv, 0);	415	gettimeofday (&tv, 0);
52	return tv.tv_sec + tv.tv_usec * 1e-6;	416	return tv.tv_sec + tv.tv_usec * 1e-6;
53	#endif	417	#endif
54	}	418	}
55		419
56	static ev_tstamp	420	ev_tstamp inline_size
57	get_clock (void)	421	get_clock (void)
58	{	422	{
59	#if HAVE_MONOTONIC	423	#if EV_USE_MONOTONIC
60	if (have_monotonic)	424	if (expect_true (have_monotonic))
61	{	425	{
62	struct timespec ts;	426	struct timespec ts;
63	clock_gettime (CLOCK_MONOTONIC, &ts);	427	clock_gettime (CLOCK_MONOTONIC, &ts);
64	return ts.tv_sec + ts.tv_nsec * 1e-9;	428	return ts.tv_sec + ts.tv_nsec * 1e-9;
65	}	429	}
66	#endif	430	#endif
67		431
68	return ev_time ();	432	return ev_time ();
69	}	433	}
70		434
		435	#if EV_MULTIPLICITY
		436	ev_tstamp
		437	ev_now (EV_P)
		438	{
		439	return ev_rt_now;
		440	}
		441	#endif
		442
		443	void
		444	ev_sleep (ev_tstamp delay)
		445	{
		446	if (delay > 0.)
		447	{
		448	#if EV_USE_NANOSLEEP
		449	struct timespec ts;
		450
		451	ts.tv_sec = (time_t)delay;
		452	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		453
		454	nanosleep (&ts, 0);
		455	#elif defined(_WIN32)
		456	Sleep (delay * 1e3);
		457	#else
		458	struct timeval tv;
		459
		460	tv.tv_sec = (time_t)delay;
		461	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		462
		463	select (0, 0, 0, 0, &tv);
		464	#endif
		465	}
		466	}
		467
		468	/*****************************************************************************/
		469
		470	int inline_size
		471	array_nextsize (int elem, int cur, int cnt)
		472	{
		473	int ncur = cur + 1;
		474
		475	do
		476	ncur <<= 1;
		477	while (cnt > ncur);
		478
		479	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		480	if (elem * ncur > 4096)
		481	{
		482	ncur *= elem;
		483	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		484	ncur = ncur - sizeof (void *) * 4;
		485	ncur /= elem;
		486	}
		487
		488	return ncur;
		489	}
		490
		491	static noinline void *
		492	array_realloc (int elem, void *base, int *cur, int cnt)
		493	{
		494	*cur = array_nextsize (elem, *cur, cnt);
		495	return ev_realloc (base, elem * *cur);
		496	}
		497
71	#define array_needsize(base,cur,cnt,init) \	498	#define array_needsize(type,base,cur,cnt,init) \
72	if ((cnt) > cur) \	499	if (expect_false ((cnt) > (cur))) \
73	{ \	500	{ \
74	int newcnt = cur ? cur << 1 : 16; \	501	int ocur_ = (cur); \
75	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	502	(base) = (type *)array_realloc \
76	base = realloc (base, sizeof (*base) * (newcnt)); \	503	(sizeof (type), (base), &(cur), (cnt)); \
77	init (base + cur, newcnt - cur); \	504	init ((base) + (ocur_), (cur) - ocur_); \
78	cur = newcnt; \	505	}
		506
		507	#if 0
		508	#define array_slim(type,stem) \
		509	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		510	{ \
		511	stem ## max = array_roundsize (stem ## cnt >> 1); \
		512	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		513	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		514	}
		515	#endif
		516
		517	#define array_free(stem, idx) \
		518	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		519
		520	/*****************************************************************************/
		521
		522	void noinline
		523	ev_feed_event (EV_P_ void *w, int revents)
		524	{
		525	W w_ = (W)w;
		526	int pri = ABSPRI (w_);
		527
		528	if (expect_false (w_->pending))
		529	pendings [pri][w_->pending - 1].events |= revents;
		530	else
		531	{
		532	w_->pending = ++pendingcnt [pri];
		533	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		534	pendings [pri][w_->pending - 1].w = w_;
		535	pendings [pri][w_->pending - 1].events = revents;
		536	}
		537	}
		538
		539	void inline_speed
		540	queue_events (EV_P_ W *events, int eventcnt, int type)
		541	{
		542	int i;
		543
		544	for (i = 0; i < eventcnt; ++i)
		545	ev_feed_event (EV_A_ events [i], type);
		546	}
		547
		548	/*****************************************************************************/
		549
		550	void inline_size
		551	anfds_init (ANFD *base, int count)
		552	{
		553	while (count--)
		554	{
		555	base->head = 0;
		556	base->events = EV_NONE;
		557	base->reify = 0;
		558
		559	++base;
		560	}
		561	}
		562
		563	void inline_speed
		564	fd_event (EV_P_ int fd, int revents)
		565	{
		566	ANFD *anfd = anfds + fd;
		567	ev_io *w;
		568
		569	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		570	{
		571	int ev = w->events & revents;
		572
		573	if (ev)
		574	ev_feed_event (EV_A_ (W)w, ev);
		575	}
		576	}
		577
		578	void
		579	ev_feed_fd_event (EV_P_ int fd, int revents)
		580	{
		581	if (fd >= 0 && fd < anfdmax)
		582	fd_event (EV_A_ fd, revents);
		583	}
		584
		585	void inline_size
		586	fd_reify (EV_P)
		587	{
		588	int i;
		589
		590	for (i = 0; i < fdchangecnt; ++i)
		591	{
		592	int fd = fdchanges [i];
		593	ANFD *anfd = anfds + fd;
		594	ev_io *w;
		595
		596	unsigned char events = 0;
		597
		598	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		599	events |= (unsigned char)w->events;
		600
		601	#if EV_SELECT_IS_WINSOCKET
		602	if (events)
		603	{
		604	unsigned long argp;
		605	#ifdef EV_FD_TO_WIN32_HANDLE
		606	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		607	#else
		608	anfd->handle = _get_osfhandle (fd);
		609	#endif
		610	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		611	}
		612	#endif
		613
		614	{
		615	unsigned char o_events = anfd->events;
		616	unsigned char o_reify = anfd->reify;
		617
		618	anfd->reify = 0;
		619	anfd->events = events;
		620
		621	if (o_events != events || o_reify & EV_IOFDSET)
		622	backend_modify (EV_A_ fd, o_events, events);
79	}	623	}
		624	}
		625
		626	fdchangecnt = 0;
		627	}
		628
		629	void inline_size
		630	fd_change (EV_P_ int fd, int flags)
		631	{
		632	unsigned char reify = anfds [fd].reify;
		633	anfds [fd].reify |= flags;
		634
		635	if (expect_true (!reify))
		636	{
		637	++fdchangecnt;
		638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		639	fdchanges [fdchangecnt - 1] = fd;
		640	}
		641	}
		642
		643	void inline_speed
		644	fd_kill (EV_P_ int fd)
		645	{
		646	ev_io *w;
		647
		648	while ((w = (ev_io *)anfds [fd].head))
		649	{
		650	ev_io_stop (EV_A_ w);
		651	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		652	}
		653	}
		654
		655	int inline_size
		656	fd_valid (int fd)
		657	{
		658	#ifdef _WIN32
		659	return _get_osfhandle (fd) != -1;
		660	#else
		661	return fcntl (fd, F_GETFD) != -1;
		662	#endif
		663	}
		664
		665	/* called on EBADF to verify fds */
		666	static void noinline
		667	fd_ebadf (EV_P)
		668	{
		669	int fd;
		670
		671	for (fd = 0; fd < anfdmax; ++fd)
		672	if (anfds [fd].events)
		673	if (!fd_valid (fd) == -1 && errno == EBADF)
		674	fd_kill (EV_A_ fd);
		675	}
		676
		677	/* called on ENOMEM in select/poll to kill some fds and retry */
		678	static void noinline
		679	fd_enomem (EV_P)
		680	{
		681	int fd;
		682
		683	for (fd = anfdmax; fd--; )
		684	if (anfds [fd].events)
		685	{
		686	fd_kill (EV_A_ fd);
		687	return;
		688	}
		689	}
		690
		691	/* usually called after fork if backend needs to re-arm all fds from scratch */
		692	static void noinline
		693	fd_rearm_all (EV_P)
		694	{
		695	int fd;
		696
		697	for (fd = 0; fd < anfdmax; ++fd)
		698	if (anfds [fd].events)
		699	{
		700	anfds [fd].events = 0;
		701	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		702	}
		703	}
		704
		705	/*****************************************************************************/
		706
		707	void inline_speed
		708	upheap (WT *heap, int k)
		709	{
		710	WT w = heap [k];
		711
		712	while (k)
		713	{
		714	int p = (k - 1) >> 1;
		715
		716	if (heap [p]->at <= w->at)
		717	break;
		718
		719	heap [k] = heap [p];
		720	((W)heap [k])->active = k + 1;
		721	k = p;
		722	}
		723
		724	heap [k] = w;
		725	((W)heap [k])->active = k + 1;
		726	}
		727
		728	void inline_speed
		729	downheap (WT *heap, int N, int k)
		730	{
		731	WT w = heap [k];
		732
		733	for (;;)
		734	{
		735	int c = (k << 1) + 1;
		736
		737	if (c >= N)
		738	break;
		739
		740	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		741	? 1 : 0;
		742
		743	if (w->at <= heap [c]->at)
		744	break;
		745
		746	heap [k] = heap [c];
		747	((W)heap [k])->active = k + 1;
		748
		749	k = c;
		750	}
		751
		752	heap [k] = w;
		753	((W)heap [k])->active = k + 1;
		754	}
		755
		756	void inline_size
		757	adjustheap (WT *heap, int N, int k)
		758	{
		759	upheap (heap, k);
		760	downheap (heap, N, k);
		761	}
		762
		763	/*****************************************************************************/
80		764
81	typedef struct	765	typedef struct
82	{	766	{
83	struct ev_io *head;	767	WL head;
84	unsigned char wev, rev; /* want, received event set */	768	EV_ATOMIC_T gotsig;
85	} ANFD;	769	} ANSIG;
86		770
87	static ANFD *anfds;	771	static ANSIG *signals;
88	static int anfdmax;	772	static int signalmax;
89		773
90	static int *fdchanges;	774	static EV_ATOMIC_T gotsig;
91	static int fdchangemax, fdchangecnt;	775
		776	void inline_size
		777	signals_init (ANSIG *base, int count)
		778	{
		779	while (count--)
		780	{
		781	base->head = 0;
		782	base->gotsig = 0;
		783
		784	++base;
		785	}
		786	}
		787
		788	/*****************************************************************************/
		789
		790	void inline_speed
		791	fd_intern (int fd)
		792	{
		793	#ifdef _WIN32
		794	int arg = 1;
		795	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		796	#else
		797	fcntl (fd, F_SETFD, FD_CLOEXEC);
		798	fcntl (fd, F_SETFL, O_NONBLOCK);
		799	#endif
		800	}
		801
		802	static void noinline
		803	evpipe_init (EV_P)
		804	{
		805	if (!ev_is_active (&pipeev))
		806	{
		807	while (pipe (evpipe))
		808	syserr ("(libev) error creating signal/async pipe");
		809
		810	fd_intern (evpipe [0]);
		811	fd_intern (evpipe [1]);
		812
		813	ev_io_set (&pipeev, evpipe [0], EV_READ);
		814	ev_io_start (EV_A_ &pipeev);
		815	ev_unref (EV_A); /* watcher should not keep loop alive */
		816
		817	/* in case we received the signal before we had the chance of installing a handler */
		818	ev_feed_event (EV_A_ &pipeev, 0);
		819	}
		820	}
		821
		822	void inline_size
		823	evpipe_write (EV_P_ int sig, int async)
		824	{
		825	if (!(gotasync || gotsig))
		826	{
		827	int old_errno = errno; /* save errno becaue write might clobber it */
		828
		829	if (sig) gotsig = 1;
		830	if (async) gotasync = 1;
		831
		832	write (evpipe [1], &old_errno, 1);
		833
		834	errno = old_errno;
		835	}
		836	}
92		837
93	static void	838	static void
94	anfds_init (ANFD *base, int count)	839	pipecb (EV_P_ ev_io *iow, int revents)
95	{	840	{
96	while (count--)	841	{
		842	int dummy;
		843	read (evpipe [0], &dummy, 1);
		844	}
		845
		846	if (gotsig && ev_is_default_loop (EV_A))
		847	{
		848	int signum;
		849	gotsig = 0;
		850
		851	for (signum = signalmax; signum--; )
		852	if (signals [signum].gotsig)
		853	ev_feed_signal_event (EV_A_ signum + 1);
97	{	854	}
98	base->head = 0;	855
99	base->wev = base->rev = EV_NONE;	856	#if EV_ASYNC_ENABLE
100	++base;	857	if (gotasync)
101	}	858	{
102	}	859	int i;
		860	gotasync = 0;
103		861
104	typedef struct	862	for (i = asynccnt; i--; )
105	{	863	if (asyncs [i]->sent)
106	struct ev_watcher *w;	864	{
107	int events;	865	asyncs [i]->sent = 0;
108	} ANPENDING;	866	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		867	}
		868	}
		869	#endif
		870	}
109		871
110	static ANPENDING *pendings;	872	/*****************************************************************************/
111	static int pendingmax, pendingcnt;
112		873
113	static void	874	static void
114	event (struct ev_watcher *w, int events)	875	sighandler (int signum)
115	{	876	{
116	w->pending = ++pendingcnt;	877	#if EV_MULTIPLICITY
117	array_needsize (pendings, pendingmax, pendingcnt, );	878	struct ev_loop *loop = &default_loop_struct;
118	pendings [pendingcnt - 1].w = w;	879	#endif
119	pendings [pendingcnt - 1].events = events;	880
		881	#if _WIN32
		882	signal (signum, sighandler);
		883	#endif
		884
		885	signals [signum - 1].gotsig = 1;
		886	evpipe_write (EV_A_ 1, 0);
120	}	887	}
		888
		889	void noinline
		890	ev_feed_signal_event (EV_P_ int signum)
		891	{
		892	WL w;
		893
		894	#if EV_MULTIPLICITY
		895	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		896	#endif
		897
		898	--signum;
		899
		900	if (signum < 0 || signum >= signalmax)
		901	return;
		902
		903	signals [signum].gotsig = 0;
		904
		905	for (w = signals [signum].head; w; w = w->next)
		906	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		907	}
		908
		909	/*****************************************************************************/
		910
		911	static WL childs [EV_PID_HASHSIZE];
		912
		913	#ifndef _WIN32
		914
		915	static ev_signal childev;
		916
		917	#ifndef WIFCONTINUED
		918	# define WIFCONTINUED(status) 0
		919	#endif
		920
		921	void inline_speed
		922	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		923	{
		924	ev_child *w;
		925	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		926
		927	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		928	{
		929	if ((w->pid == pid || !w->pid)
		930	&& (!traced || (w->flags & 1)))
		931	{
		932	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		933	w->rpid = pid;
		934	w->rstatus = status;
		935	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		936	}
		937	}
		938	}
		939
		940	#ifndef WCONTINUED
		941	# define WCONTINUED 0
		942	#endif
121		943
122	static void	944	static void
123	fd_event (int fd, int events)	945	childcb (EV_P_ ev_signal *sw, int revents)
124	{	946	{
125	ANFD *anfd = anfds + fd;	947	int pid, status;
126	struct ev_io *w;
127		948
128	for (w = anfd->head; w; w = w->next)	949	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
129	{	950	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
130	int ev = w->events & events;	951	if (!WCONTINUED
		952	|| errno != EINVAL
		953	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		954	return;
131		955
132	if (ev)	956	/* make sure we are called again until all childs have been reaped */
133	event ((struct ev_watcher *)w, ev);	957	/* we need to do it this way so that the callback gets called before we continue */
134	}	958	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
135	}
136		959
137	static struct ev_timer **atimers;	960	child_reap (EV_A_ sw, pid, pid, status);
138	static int atimermax, atimercnt;	961	if (EV_PID_HASHSIZE > 1)
139		962	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
140	static struct ev_timer **rtimers;
141	static int rtimermax, rtimercnt;
142
143	static void
144	upheap (struct ev_timer **timers, int k)
145	{
146	struct ev_timer *w = timers [k];
147
148	while (k && timers [k >> 1]->at > w->at)
149	{
150	timers [k] = timers [k >> 1];
151	timers [k]->active = k + 1;
152	k >>= 1;
153	}
154
155	timers [k] = w;
156	timers [k]->active = k + 1;
157
158	}	963	}
159		964
160	static void	965	#endif
161	downheap (struct ev_timer **timers, int N, int k)
162	{
163	struct ev_timer *w = timers [k];
164		966
165	while (k < (N >> 1))	967	/*****************************************************************************/
166	{
167	int j = k << 1;
168		968
169	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	969	#if EV_USE_PORT
170	++j;	970	# include "ev_port.c"
171		971	#endif
172	if (w->at <= timers [j]->at)	972	#if EV_USE_KQUEUE
173	break;	973	# include "ev_kqueue.c"
174		974	#endif
175	timers [k] = timers [j];
176	timers [k]->active = k + 1;
177	k = j;
178	}
179
180	timers [k] = w;
181	timers [k]->active = k + 1;
182	}
183
184	static struct ev_signal **signals;
185	static int signalmax;
186
187	static void
188	signals_init (struct ev_signal **base, int count)
189	{
190	while (count--)
191	*base++ = 0;
192	}
193
194	#if HAVE_EPOLL	975	#if EV_USE_EPOLL
195	# include "ev_epoll.c"	976	# include "ev_epoll.c"
196	#endif	977	#endif
		978	#if EV_USE_POLL
		979	# include "ev_poll.c"
		980	#endif
197	#if HAVE_SELECT	981	#if EV_USE_SELECT
198	# include "ev_select.c"	982	# include "ev_select.c"
199	#endif	983	#endif
200		984
201	int ev_init (int flags)	985	int
		986	ev_version_major (void)
202	{	987	{
		988	return EV_VERSION_MAJOR;
		989	}
		990
		991	int
		992	ev_version_minor (void)
		993	{
		994	return EV_VERSION_MINOR;
		995	}
		996
		997	/* return true if we are running with elevated privileges and should ignore env variables */
		998	int inline_size
		999	enable_secure (void)
		1000	{
		1001	#ifdef _WIN32
		1002	return 0;
		1003	#else
		1004	return getuid () != geteuid ()
		1005	|| getgid () != getegid ();
		1006	#endif
		1007	}
		1008
		1009	unsigned int
		1010	ev_supported_backends (void)
		1011	{
		1012	unsigned int flags = 0;
		1013
		1014	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1015	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1016	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1017	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1018	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1019
		1020	return flags;
		1021	}
		1022
		1023	unsigned int
		1024	ev_recommended_backends (void)
		1025	{
		1026	unsigned int flags = ev_supported_backends ();
		1027
		1028	#ifndef __NetBSD__
		1029	/* kqueue is borked on everything but netbsd apparently */
		1030	/* it usually doesn't work correctly on anything but sockets and pipes */
		1031	flags &= ~EVBACKEND_KQUEUE;
		1032	#endif
		1033	#ifdef __APPLE__
		1034	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1035	flags &= ~EVBACKEND_POLL;
		1036	#endif
		1037
		1038	return flags;
		1039	}
		1040
		1041	unsigned int
		1042	ev_embeddable_backends (void)
		1043	{
		1044	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1045
		1046	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1047	/* please fix it and tell me how to detect the fix */
		1048	flags &= ~EVBACKEND_EPOLL;
		1049
		1050	return flags;
		1051	}
		1052
		1053	unsigned int
		1054	ev_backend (EV_P)
		1055	{
		1056	return backend;
		1057	}
		1058
		1059	unsigned int
		1060	ev_loop_count (EV_P)
		1061	{
		1062	return loop_count;
		1063	}
		1064
		1065	void
		1066	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1067	{
		1068	io_blocktime = interval;
		1069	}
		1070
		1071	void
		1072	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1073	{
		1074	timeout_blocktime = interval;
		1075	}
		1076
		1077	static void noinline
		1078	loop_init (EV_P_ unsigned int flags)
		1079	{
		1080	if (!backend)
		1081	{
203	#if HAVE_MONOTONIC	1082	#if EV_USE_MONOTONIC
204	{	1083	{
205	struct timespec ts;	1084	struct timespec ts;
206	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1085	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
207	have_monotonic = 1;	1086	have_monotonic = 1;
208	}	1087	}
209	#endif	1088	#endif
210		1089
211	ev_now = ev_time ();	1090	ev_rt_now = ev_time ();
212	now = get_clock ();	1091	mn_now = get_clock ();
213	diff = ev_now - now;	1092	now_floor = mn_now;
		1093	rtmn_diff = ev_rt_now - mn_now;
214		1094
		1095	io_blocktime = 0.;
		1096	timeout_blocktime = 0.;
		1097	backend = 0;
		1098	backend_fd = -1;
		1099	gotasync = 0;
		1100	#if EV_USE_INOTIFY
		1101	fs_fd = -2;
		1102	#endif
		1103
		1104	/* pid check not overridable via env */
		1105	#ifndef _WIN32
		1106	if (flags & EVFLAG_FORKCHECK)
		1107	curpid = getpid ();
		1108	#endif
		1109
		1110	if (!(flags & EVFLAG_NOENV)
		1111	&& !enable_secure ()
		1112	&& getenv ("LIBEV_FLAGS"))
		1113	flags = atoi (getenv ("LIBEV_FLAGS"));
		1114
		1115	if (!(flags & 0x0000ffffUL))
		1116	flags |= ev_recommended_backends ();
		1117
		1118	#if EV_USE_PORT
		1119	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1120	#endif
		1121	#if EV_USE_KQUEUE
		1122	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1123	#endif
215	#if HAVE_EPOLL	1124	#if EV_USE_EPOLL
216	if (epoll_init (flags))	1125	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
217	return ev_method;
218	#endif	1126	#endif
		1127	#if EV_USE_POLL
		1128	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1129	#endif
219	#if HAVE_SELECT	1130	#if EV_USE_SELECT
220	if (select_init (flags))	1131	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
221	return ev_method;
222	#endif	1132	#endif
223		1133
224	ev_method = EVMETHOD_NONE;	1134	ev_init (&pipeev, pipecb);
225	return ev_method;	1135	ev_set_priority (&pipeev, EV_MAXPRI);
		1136	}
226	}	1137	}
227		1138
228	void ev_prefork (void)	1139	static void noinline
229	{	1140	loop_destroy (EV_P)
230	}
231
232	void ev_postfork_parent (void)
233	{
234	}
235
236	void ev_postfork_child (void)
237	{
238	#if HAVE_EPOLL
239	epoll_postfork_child ();
240	#endif
241	}
242
243	static void
244	call_pending ()
245	{	1141	{
246	int i;	1142	int i;
247		1143
248	for (i = 0; i < pendingcnt; ++i)	1144	if (ev_is_active (&pipeev))
		1145	{
		1146	ev_ref (EV_A); /* signal watcher */
		1147	ev_io_stop (EV_A_ &pipeev);
		1148
		1149	close (evpipe [0]); evpipe [0] = 0;
		1150	close (evpipe [1]); evpipe [1] = 0;
249	{	1151	}
250	ANPENDING *p = pendings + i;
251		1152
252	if (p->w)	1153	#if EV_USE_INOTIFY
		1154	if (fs_fd >= 0)
		1155	close (fs_fd);
		1156	#endif
		1157
		1158	if (backend_fd >= 0)
		1159	close (backend_fd);
		1160
		1161	#if EV_USE_PORT
		1162	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1163	#endif
		1164	#if EV_USE_KQUEUE
		1165	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1166	#endif
		1167	#if EV_USE_EPOLL
		1168	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1169	#endif
		1170	#if EV_USE_POLL
		1171	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1172	#endif
		1173	#if EV_USE_SELECT
		1174	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1175	#endif
		1176
		1177	for (i = NUMPRI; i--; )
		1178	{
		1179	array_free (pending, [i]);
		1180	#if EV_IDLE_ENABLE
		1181	array_free (idle, [i]);
		1182	#endif
		1183	}
		1184
		1185	ev_free (anfds); anfdmax = 0;
		1186
		1187	/* have to use the microsoft-never-gets-it-right macro */
		1188	array_free (fdchange, EMPTY);
		1189	array_free (timer, EMPTY);
		1190	#if EV_PERIODIC_ENABLE
		1191	array_free (periodic, EMPTY);
		1192	#endif
		1193	#if EV_FORK_ENABLE
		1194	array_free (fork, EMPTY);
		1195	#endif
		1196	array_free (prepare, EMPTY);
		1197	array_free (check, EMPTY);
		1198	#if EV_ASYNC_ENABLE
		1199	array_free (async, EMPTY);
		1200	#endif
		1201
		1202	backend = 0;
		1203	}
		1204
		1205	void inline_size infy_fork (EV_P);
		1206
		1207	void inline_size
		1208	loop_fork (EV_P)
		1209	{
		1210	#if EV_USE_PORT
		1211	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1212	#endif
		1213	#if EV_USE_KQUEUE
		1214	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1215	#endif
		1216	#if EV_USE_EPOLL
		1217	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1218	#endif
		1219	#if EV_USE_INOTIFY
		1220	infy_fork (EV_A);
		1221	#endif
		1222
		1223	if (ev_is_active (&pipeev))
		1224	{
		1225	/* this "locks" the handlers against writing to the pipe */
		1226	gotsig = gotasync = 1;
		1227
		1228	ev_ref (EV_A);
		1229	ev_io_stop (EV_A_ &pipeev);
		1230	close (evpipe [0]);
		1231	close (evpipe [1]);
		1232
		1233	evpipe_init (EV_A);
		1234	/* now iterate over everything, in case we missed something */
		1235	pipecb (EV_A_ &pipeev, EV_READ);
		1236	}
		1237
		1238	postfork = 0;
		1239	}
		1240
		1241	#if EV_MULTIPLICITY
		1242	struct ev_loop *
		1243	ev_loop_new (unsigned int flags)
		1244	{
		1245	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1246
		1247	memset (loop, 0, sizeof (struct ev_loop));
		1248
		1249	loop_init (EV_A_ flags);
		1250
		1251	if (ev_backend (EV_A))
		1252	return loop;
		1253
		1254	return 0;
		1255	}
		1256
		1257	void
		1258	ev_loop_destroy (EV_P)
		1259	{
		1260	loop_destroy (EV_A);
		1261	ev_free (loop);
		1262	}
		1263
		1264	void
		1265	ev_loop_fork (EV_P)
		1266	{
		1267	postfork = 1; /* must be in line with ev_default_fork */
		1268	}
		1269
		1270	#endif
		1271
		1272	#if EV_MULTIPLICITY
		1273	struct ev_loop *
		1274	ev_default_loop_init (unsigned int flags)
		1275	#else
		1276	int
		1277	ev_default_loop (unsigned int flags)
		1278	#endif
		1279	{
		1280	if (!ev_default_loop_ptr)
		1281	{
		1282	#if EV_MULTIPLICITY
		1283	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1284	#else
		1285	ev_default_loop_ptr = 1;
		1286	#endif
		1287
		1288	loop_init (EV_A_ flags);
		1289
		1290	if (ev_backend (EV_A))
253	{	1291	{
254	p->w->pending = 0;	1292	#ifndef _WIN32
255	p->w->cb (p->w, p->events);	1293	ev_signal_init (&childev, childcb, SIGCHLD);
		1294	ev_set_priority (&childev, EV_MAXPRI);
		1295	ev_signal_start (EV_A_ &childev);
		1296	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1297	#endif
256	}	1298	}
		1299	else
		1300	ev_default_loop_ptr = 0;
		1301	}
		1302
		1303	return ev_default_loop_ptr;
		1304	}
		1305
		1306	void
		1307	ev_default_destroy (void)
		1308	{
		1309	#if EV_MULTIPLICITY
		1310	struct ev_loop *loop = ev_default_loop_ptr;
		1311	#endif
		1312
		1313	#ifndef _WIN32
		1314	ev_ref (EV_A); /* child watcher */
		1315	ev_signal_stop (EV_A_ &childev);
		1316	#endif
		1317
		1318	loop_destroy (EV_A);
		1319	}
		1320
		1321	void
		1322	ev_default_fork (void)
		1323	{
		1324	#if EV_MULTIPLICITY
		1325	struct ev_loop *loop = ev_default_loop_ptr;
		1326	#endif
		1327
		1328	if (backend)
		1329	postfork = 1; /* must be in line with ev_loop_fork */
		1330	}
		1331
		1332	/*****************************************************************************/
		1333
		1334	void
		1335	ev_invoke (EV_P_ void *w, int revents)
		1336	{
		1337	EV_CB_INVOKE ((W)w, revents);
		1338	}
		1339
		1340	void inline_speed
		1341	call_pending (EV_P)
		1342	{
		1343	int pri;
		1344
		1345	for (pri = NUMPRI; pri--; )
		1346	while (pendingcnt [pri])
		1347	{
		1348	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1349
		1350	if (expect_true (p->w))
		1351	{
		1352	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1353
		1354	p->w->pending = 0;
		1355	EV_CB_INVOKE (p->w, p->events);
		1356	}
257	}	1357	}
258
259	pendingcnt = 0;
260	}	1358	}
261		1359
262	static void	1360	void inline_size
263	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1361	timers_reify (EV_P)
264	{	1362	{
265	while (timercnt && timers [0]->at <= now)	1363	while (timercnt && ((WT)timers [0])->at <= mn_now)
266	{	1364	{
267	struct ev_timer *w = timers [0];	1365	ev_timer *w = (ev_timer *)timers [0];
		1366
		1367	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
268		1368
269	/* first reschedule or stop timer */	1369	/* first reschedule or stop timer */
270	if (w->repeat)	1370	if (w->repeat)
271	{	1371	{
272	if (w->is_abs)	1372	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
273	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1373
274	else
275	w->at = now + w->repeat;	1374	((WT)w)->at += w->repeat;
276		1375	if (((WT)w)->at < mn_now)
277	assert (w->at > now);	1376	((WT)w)->at = mn_now;
278		1377
279	downheap (timers, timercnt, 0);	1378	downheap (timers, timercnt, 0);
280	}	1379	}
281	else	1380	else
		1381	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1382
		1383	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1384	}
		1385	}
		1386
		1387	#if EV_PERIODIC_ENABLE
		1388	void inline_size
		1389	periodics_reify (EV_P)
		1390	{
		1391	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1392	{
		1393	ev_periodic *w = (ev_periodic *)periodics [0];
		1394
		1395	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1396
		1397	/* first reschedule or stop timer */
		1398	if (w->reschedule_cb)
282	{	1399	{
283	evtimer_stop (w); /* nonrepeating: stop timer */	1400	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
284	--timercnt; /* maybe pass by reference instead? */	1401	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1402	downheap (periodics, periodiccnt, 0);
285	}	1403	}
		1404	else if (w->interval)
		1405	{
		1406	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1407	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1408	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1409	downheap (periodics, periodiccnt, 0);
		1410	}
		1411	else
		1412	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
286		1413
287	event ((struct ev_watcher *)w, EV_TIMEOUT);	1414	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
288	}	1415	}
289	}	1416	}
290		1417
291	static void	1418	static void noinline
292	time_update ()	1419	periodics_reschedule (EV_P)
293	{	1420	{
294	int i;	1421	int i;
295	ev_now = ev_time ();
296		1422
297	if (have_monotonic)	1423	/* adjust periodics after time jump */
		1424	for (i = 0; i < periodiccnt; ++i)
		1425	{
		1426	ev_periodic *w = (ev_periodic *)periodics [i];
		1427
		1428	if (w->reschedule_cb)
		1429	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1430	else if (w->interval)
		1431	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
298	{	1432	}
299	ev_tstamp odiff = diff;
300		1433
301	/* detecting time jumps is much more difficult */	1434	/* now rebuild the heap */
302	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1435	for (i = periodiccnt >> 1; i--; )
		1436	downheap (periodics, periodiccnt, i);
		1437	}
		1438	#endif
		1439
		1440	#if EV_IDLE_ENABLE
		1441	void inline_size
		1442	idle_reify (EV_P)
		1443	{
		1444	if (expect_false (idleall))
		1445	{
		1446	int pri;
		1447
		1448	for (pri = NUMPRI; pri--; )
303	{	1449	{
		1450	if (pendingcnt [pri])
		1451	break;
		1452
		1453	if (idlecnt [pri])
		1454	{
		1455	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1456	break;
		1457	}
		1458	}
		1459	}
		1460	}
		1461	#endif
		1462
		1463	void inline_speed
		1464	time_update (EV_P_ ev_tstamp max_block)
		1465	{
		1466	int i;
		1467
		1468	#if EV_USE_MONOTONIC
		1469	if (expect_true (have_monotonic))
		1470	{
		1471	ev_tstamp odiff = rtmn_diff;
		1472
304	now = get_clock ();	1473	mn_now = get_clock ();
		1474
		1475	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1476	/* interpolate in the meantime */
		1477	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1478	{
		1479	ev_rt_now = rtmn_diff + mn_now;
		1480	return;
		1481	}
		1482
		1483	now_floor = mn_now;
		1484	ev_rt_now = ev_time ();
		1485
		1486	/* loop a few times, before making important decisions.
		1487	* on the choice of "4": one iteration isn't enough,
		1488	* in case we get preempted during the calls to
		1489	* ev_time and get_clock. a second call is almost guaranteed
		1490	* to succeed in that case, though. and looping a few more times
		1491	* doesn't hurt either as we only do this on time-jumps or
		1492	* in the unlikely event of having been preempted here.
		1493	*/
		1494	for (i = 4; --i; )
		1495	{
305	diff = ev_now - now;	1496	rtmn_diff = ev_rt_now - mn_now;
306		1497
307	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1498	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
308	return; /* all is well */	1499	return; /* all is well */
309		1500
310	ev_now = ev_time ();	1501	ev_rt_now = ev_time ();
		1502	mn_now = get_clock ();
		1503	now_floor = mn_now;
311	}	1504	}
312		1505
313	/* time jump detected, reschedule atimers */	1506	# if EV_PERIODIC_ENABLE
314	for (i = 0; i < atimercnt; ++i)	1507	periodics_reschedule (EV_A);
		1508	# endif
		1509	/* no timer adjustment, as the monotonic clock doesn't jump */
		1510	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1511	}
		1512	else
		1513	#endif
		1514	{
		1515	ev_rt_now = ev_time ();
		1516
		1517	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
315	{	1518	{
316	struct ev_timer *w = atimers [i];	1519	#if EV_PERIODIC_ENABLE
317	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1520	periodics_reschedule (EV_A);
		1521	#endif
		1522	/* adjust timers. this is easy, as the offset is the same for all of them */
		1523	for (i = 0; i < timercnt; ++i)
		1524	((WT)timers [i])->at += ev_rt_now - mn_now;
318	}	1525	}
319	}
320	else
321	{
322	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
323	/* time jump detected, adjust rtimers */
324	for (i = 0; i < rtimercnt; ++i)
325	rtimers [i]->at += ev_now - now;
326		1526
327	now = ev_now;	1527	mn_now = ev_rt_now;
328	}	1528	}
329	}	1529	}
330		1530
331	int ev_loop_done;	1531	void
		1532	ev_ref (EV_P)
		1533	{
		1534	++activecnt;
		1535	}
332		1536
		1537	void
		1538	ev_unref (EV_P)
		1539	{
		1540	--activecnt;
		1541	}
		1542
		1543	static int loop_done;
		1544
		1545	void
333	void ev_loop (int flags)	1546	ev_loop (EV_P_ int flags)
334	{	1547	{
335	double block;
336	ev_loop_done = flags & EVLOOP_ONESHOT;	1548	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1549	? EVUNLOOP_ONE
		1550	: EVUNLOOP_CANCEL;
		1551
		1552	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
337		1553
338	do	1554	do
339	{	1555	{
		1556	#ifndef _WIN32
		1557	if (expect_false (curpid)) /* penalise the forking check even more */
		1558	if (expect_false (getpid () != curpid))
		1559	{
		1560	curpid = getpid ();
		1561	postfork = 1;
		1562	}
		1563	#endif
		1564
		1565	#if EV_FORK_ENABLE
		1566	/* we might have forked, so queue fork handlers */
		1567	if (expect_false (postfork))
		1568	if (forkcnt)
		1569	{
		1570	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1571	call_pending (EV_A);
		1572	}
		1573	#endif
		1574
		1575	/* queue prepare watchers (and execute them) */
		1576	if (expect_false (preparecnt))
		1577	{
		1578	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1579	call_pending (EV_A);
		1580	}
		1581
		1582	if (expect_false (!activecnt))
		1583	break;
		1584
		1585	/* we might have forked, so reify kernel state if necessary */
		1586	if (expect_false (postfork))
		1587	loop_fork (EV_A);
		1588
340	/* update fd-related kernel structures */	1589	/* update fd-related kernel structures */
341	method_reify (); fdchangecnt = 0;	1590	fd_reify (EV_A);
342		1591
343	/* calculate blocking time */	1592	/* calculate blocking time */
344	if (flags & EVLOOP_NONBLOCK)	1593	{
345	block = 0.;	1594	ev_tstamp waittime = 0.;
346	else	1595	ev_tstamp sleeptime = 0.;
		1596
		1597	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
347	{	1598	{
		1599	/* update time to cancel out callback processing overhead */
		1600	time_update (EV_A_ 1e100);
		1601
348	block = MAX_BLOCKTIME;	1602	waittime = MAX_BLOCKTIME;
349		1603
350	if (rtimercnt)	1604	if (timercnt)
351	{	1605	{
352	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1606	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
353	if (block > to) block = to;	1607	if (waittime > to) waittime = to;
354	}	1608	}
355		1609
		1610	#if EV_PERIODIC_ENABLE
356	if (atimercnt)	1611	if (periodiccnt)
357	{	1612	{
358	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1613	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
359	if (block > to) block = to;	1614	if (waittime > to) waittime = to;
360	}	1615	}
		1616	#endif
361		1617
362	if (block < 0.) block = 0.;	1618	if (expect_false (waittime < timeout_blocktime))
		1619	waittime = timeout_blocktime;
		1620
		1621	sleeptime = waittime - backend_fudge;
		1622
		1623	if (expect_true (sleeptime > io_blocktime))
		1624	sleeptime = io_blocktime;
		1625
		1626	if (sleeptime)
		1627	{
		1628	ev_sleep (sleeptime);
		1629	waittime -= sleeptime;
		1630	}
363	}	1631	}
364		1632
365	method_poll (block);	1633	++loop_count;
		1634	backend_poll (EV_A_ waittime);
366		1635
367	/* update ev_now, do magic */	1636	/* update ev_rt_now, do magic */
368	time_update ();	1637	time_update (EV_A_ waittime + sleeptime);
		1638	}
369		1639
370	/* put pending timers into pendign queue and reschedule them */	1640	/* queue pending timers and reschedule them */
371	/* absolute timers first */	1641	timers_reify (EV_A); /* relative timers called last */
372	timers_reify (atimers, atimercnt, ev_now);	1642	#if EV_PERIODIC_ENABLE
373	/* relative timers second */	1643	periodics_reify (EV_A); /* absolute timers called first */
374	timers_reify (rtimers, rtimercnt, now);	1644	#endif
375		1645
		1646	#if EV_IDLE_ENABLE
		1647	/* queue idle watchers unless other events are pending */
		1648	idle_reify (EV_A);
		1649	#endif
		1650
		1651	/* queue check watchers, to be executed first */
		1652	if (expect_false (checkcnt))
		1653	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1654
376	call_pending ();	1655	call_pending (EV_A);
377	}
378	while (!ev_loop_done);
379	}
380		1656
381	static void	1657	}
382	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1658	while (expect_true (activecnt && !loop_done));
		1659
		1660	if (loop_done == EVUNLOOP_ONE)
		1661	loop_done = EVUNLOOP_CANCEL;
		1662	}
		1663
		1664	void
		1665	ev_unloop (EV_P_ int how)
		1666	{
		1667	loop_done = how;
		1668	}
		1669
		1670	/*****************************************************************************/
		1671
		1672	void inline_size
		1673	wlist_add (WL *head, WL elem)
383	{	1674	{
384	elem->next = *head;	1675	elem->next = *head;
385	*head = elem;	1676	*head = elem;
386	}	1677	}
387		1678
388	static void	1679	void inline_size
389	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1680	wlist_del (WL *head, WL elem)
390	{	1681	{
391	while (*head)	1682	while (*head)
392	{	1683	{
393	if (*head == elem)	1684	if (*head == elem)
394	{	1685	{
…		…
398		1689
399	head = &(*head)->next;	1690	head = &(*head)->next;
400	}	1691	}
401	}	1692	}
402		1693
		1694	void inline_speed
		1695	clear_pending (EV_P_ W w)
		1696	{
		1697	if (w->pending)
		1698	{
		1699	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1700	w->pending = 0;
		1701	}
		1702	}
		1703
		1704	int
		1705	ev_clear_pending (EV_P_ void *w)
		1706	{
		1707	W w_ = (W)w;
		1708	int pending = w_->pending;
		1709
		1710	if (expect_true (pending))
		1711	{
		1712	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1713	w_->pending = 0;
		1714	p->w = 0;
		1715	return p->events;
		1716	}
		1717	else
		1718	return 0;
		1719	}
		1720
		1721	void inline_size
		1722	pri_adjust (EV_P_ W w)
		1723	{
		1724	int pri = w->priority;
		1725	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1726	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1727	w->priority = pri;
		1728	}
		1729
		1730	void inline_speed
		1731	ev_start (EV_P_ W w, int active)
		1732	{
		1733	pri_adjust (EV_A_ w);
		1734	w->active = active;
		1735	ev_ref (EV_A);
		1736	}
		1737
		1738	void inline_size
		1739	ev_stop (EV_P_ W w)
		1740	{
		1741	ev_unref (EV_A);
		1742	w->active = 0;
		1743	}
		1744
		1745	/*****************************************************************************/
		1746
		1747	void noinline
		1748	ev_io_start (EV_P_ ev_io *w)
		1749	{
		1750	int fd = w->fd;
		1751
		1752	if (expect_false (ev_is_active (w)))
		1753	return;
		1754
		1755	assert (("ev_io_start called with negative fd", fd >= 0));
		1756
		1757	ev_start (EV_A_ (W)w, 1);
		1758	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1759	wlist_add (&anfds[fd].head, (WL)w);
		1760
		1761	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1762	w->events &= ~EV_IOFDSET;
		1763	}
		1764
		1765	void noinline
		1766	ev_io_stop (EV_P_ ev_io *w)
		1767	{
		1768	clear_pending (EV_A_ (W)w);
		1769	if (expect_false (!ev_is_active (w)))
		1770	return;
		1771
		1772	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1773
		1774	wlist_del (&anfds[w->fd].head, (WL)w);
		1775	ev_stop (EV_A_ (W)w);
		1776
		1777	fd_change (EV_A_ w->fd, 1);
		1778	}
		1779
		1780	void noinline
		1781	ev_timer_start (EV_P_ ev_timer *w)
		1782	{
		1783	if (expect_false (ev_is_active (w)))
		1784	return;
		1785
		1786	((WT)w)->at += mn_now;
		1787
		1788	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1789
		1790	ev_start (EV_A_ (W)w, ++timercnt);
		1791	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1792	timers [timercnt - 1] = (WT)w;
		1793	upheap (timers, timercnt - 1);
		1794
		1795	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1796	}
		1797
		1798	void noinline
		1799	ev_timer_stop (EV_P_ ev_timer *w)
		1800	{
		1801	clear_pending (EV_A_ (W)w);
		1802	if (expect_false (!ev_is_active (w)))
		1803	return;
		1804
		1805	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1806
		1807	{
		1808	int active = ((W)w)->active;
		1809
		1810	if (expect_true (--active < --timercnt))
		1811	{
		1812	timers [active] = timers [timercnt];
		1813	adjustheap (timers, timercnt, active);
		1814	}
		1815	}
		1816
		1817	((WT)w)->at -= mn_now;
		1818
		1819	ev_stop (EV_A_ (W)w);
		1820	}
		1821
		1822	void noinline
		1823	ev_timer_again (EV_P_ ev_timer *w)
		1824	{
		1825	if (ev_is_active (w))
		1826	{
		1827	if (w->repeat)
		1828	{
		1829	((WT)w)->at = mn_now + w->repeat;
		1830	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1831	}
		1832	else
		1833	ev_timer_stop (EV_A_ w);
		1834	}
		1835	else if (w->repeat)
		1836	{
		1837	w->at = w->repeat;
		1838	ev_timer_start (EV_A_ w);
		1839	}
		1840	}
		1841
		1842	#if EV_PERIODIC_ENABLE
		1843	void noinline
		1844	ev_periodic_start (EV_P_ ev_periodic *w)
		1845	{
		1846	if (expect_false (ev_is_active (w)))
		1847	return;
		1848
		1849	if (w->reschedule_cb)
		1850	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1851	else if (w->interval)
		1852	{
		1853	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1854	/* this formula differs from the one in periodic_reify because we do not always round up */
		1855	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1856	}
		1857	else
		1858	((WT)w)->at = w->offset;
		1859
		1860	ev_start (EV_A_ (W)w, ++periodiccnt);
		1861	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
		1862	periodics [periodiccnt - 1] = (WT)w;
		1863	upheap (periodics, periodiccnt - 1);
		1864
		1865	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1866	}
		1867
		1868	void noinline
		1869	ev_periodic_stop (EV_P_ ev_periodic *w)
		1870	{
		1871	clear_pending (EV_A_ (W)w);
		1872	if (expect_false (!ev_is_active (w)))
		1873	return;
		1874
		1875	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1876
		1877	{
		1878	int active = ((W)w)->active;
		1879
		1880	if (expect_true (--active < --periodiccnt))
		1881	{
		1882	periodics [active] = periodics [periodiccnt];
		1883	adjustheap (periodics, periodiccnt, active);
		1884	}
		1885	}
		1886
		1887	ev_stop (EV_A_ (W)w);
		1888	}
		1889
		1890	void noinline
		1891	ev_periodic_again (EV_P_ ev_periodic *w)
		1892	{
		1893	/* TODO: use adjustheap and recalculation */
		1894	ev_periodic_stop (EV_A_ w);
		1895	ev_periodic_start (EV_A_ w);
		1896	}
		1897	#endif
		1898
		1899	#ifndef SA_RESTART
		1900	# define SA_RESTART 0
		1901	#endif
		1902
		1903	void noinline
		1904	ev_signal_start (EV_P_ ev_signal *w)
		1905	{
		1906	#if EV_MULTIPLICITY
		1907	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1908	#endif
		1909	if (expect_false (ev_is_active (w)))
		1910	return;
		1911
		1912	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1913
		1914	evpipe_init (EV_A);
		1915
		1916	{
		1917	#ifndef _WIN32
		1918	sigset_t full, prev;
		1919	sigfillset (&full);
		1920	sigprocmask (SIG_SETMASK, &full, &prev);
		1921	#endif
		1922
		1923	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1924
		1925	#ifndef _WIN32
		1926	sigprocmask (SIG_SETMASK, &prev, 0);
		1927	#endif
		1928	}
		1929
		1930	ev_start (EV_A_ (W)w, 1);
		1931	wlist_add (&signals [w->signum - 1].head, (WL)w);
		1932
		1933	if (!((WL)w)->next)
		1934	{
		1935	#if _WIN32
		1936	signal (w->signum, sighandler);
		1937	#else
		1938	struct sigaction sa;
		1939	sa.sa_handler = sighandler;
		1940	sigfillset (&sa.sa_mask);
		1941	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1942	sigaction (w->signum, &sa, 0);
		1943	#endif
		1944	}
		1945	}
		1946
		1947	void noinline
		1948	ev_signal_stop (EV_P_ ev_signal *w)
		1949	{
		1950	clear_pending (EV_A_ (W)w);
		1951	if (expect_false (!ev_is_active (w)))
		1952	return;
		1953
		1954	wlist_del (&signals [w->signum - 1].head, (WL)w);
		1955	ev_stop (EV_A_ (W)w);
		1956
		1957	if (!signals [w->signum - 1].head)
		1958	signal (w->signum, SIG_DFL);
		1959	}
		1960
		1961	void
		1962	ev_child_start (EV_P_ ev_child *w)
		1963	{
		1964	#if EV_MULTIPLICITY
		1965	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1966	#endif
		1967	if (expect_false (ev_is_active (w)))
		1968	return;
		1969
		1970	ev_start (EV_A_ (W)w, 1);
		1971	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1972	}
		1973
		1974	void
		1975	ev_child_stop (EV_P_ ev_child *w)
		1976	{
		1977	clear_pending (EV_A_ (W)w);
		1978	if (expect_false (!ev_is_active (w)))
		1979	return;
		1980
		1981	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1982	ev_stop (EV_A_ (W)w);
		1983	}
		1984
		1985	#if EV_STAT_ENABLE
		1986
		1987	# ifdef _WIN32
		1988	# undef lstat
		1989	# define lstat(a,b) _stati64 (a,b)
		1990	# endif
		1991
		1992	#define DEF_STAT_INTERVAL 5.0074891
		1993	#define MIN_STAT_INTERVAL 0.1074891
		1994
		1995	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1996
		1997	#if EV_USE_INOTIFY
		1998	# define EV_INOTIFY_BUFSIZE 8192
		1999
		2000	static void noinline
		2001	infy_add (EV_P_ ev_stat *w)
		2002	{
		2003	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);
		2004
		2005	if (w->wd < 0)
		2006	{
		2007	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2008
		2009	/* monitor some parent directory for speedup hints */
		2010	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2011	{
		2012	char path [4096];
		2013	strcpy (path, w->path);
		2014
		2015	do
		2016	{
		2017	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2018	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2019
		2020	char *pend = strrchr (path, '/');
		2021
		2022	if (!pend)
		2023	break; /* whoops, no '/', complain to your admin */
		2024
		2025	*pend = 0;
		2026	w->wd = inotify_add_watch (fs_fd, path, mask);
		2027	}
		2028	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2029	}
		2030	}
		2031	else
		2032	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2033
		2034	if (w->wd >= 0)
		2035	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2036	}
		2037
		2038	static void noinline
		2039	infy_del (EV_P_ ev_stat *w)
		2040	{
		2041	int slot;
		2042	int wd = w->wd;
		2043
		2044	if (wd < 0)
		2045	return;
		2046
		2047	w->wd = -2;
		2048	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2049	wlist_del (&fs_hash [slot].head, (WL)w);
		2050
		2051	/* remove this watcher, if others are watching it, they will rearm */
		2052	inotify_rm_watch (fs_fd, wd);
		2053	}
		2054
		2055	static void noinline
		2056	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2057	{
		2058	if (slot < 0)
		2059	/* overflow, need to check for all hahs slots */
		2060	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2061	infy_wd (EV_A_ slot, wd, ev);
		2062	else
		2063	{
		2064	WL w_;
		2065
		2066	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2067	{
		2068	ev_stat *w = (ev_stat *)w_;
		2069	w_ = w_->next; /* lets us remove this watcher and all before it */
		2070
		2071	if (w->wd == wd || wd == -1)
		2072	{
		2073	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2074	{
		2075	w->wd = -1;
		2076	infy_add (EV_A_ w); /* re-add, no matter what */
		2077	}
		2078
		2079	stat_timer_cb (EV_A_ &w->timer, 0);
		2080	}
		2081	}
		2082	}
		2083	}
		2084
403	static void	2085	static void
404	ev_start (struct ev_watcher *w, int active)	2086	infy_cb (EV_P_ ev_io *w, int revents)
405	{	2087	{
406	w->pending = 0;	2088	char buf [EV_INOTIFY_BUFSIZE];
407	w->active = active;	2089	struct inotify_event *ev = (struct inotify_event *)buf;
		2090	int ofs;
		2091	int len = read (fs_fd, buf, sizeof (buf));
		2092
		2093	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2094	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2095	}
		2096
		2097	void inline_size
		2098	infy_init (EV_P)
		2099	{
		2100	if (fs_fd != -2)
		2101	return;
		2102
		2103	fs_fd = inotify_init ();
		2104
		2105	if (fs_fd >= 0)
		2106	{
		2107	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2108	ev_set_priority (&fs_w, EV_MAXPRI);
		2109	ev_io_start (EV_A_ &fs_w);
		2110	}
		2111	}
		2112
		2113	void inline_size
		2114	infy_fork (EV_P)
		2115	{
		2116	int slot;
		2117
		2118	if (fs_fd < 0)
		2119	return;
		2120
		2121	close (fs_fd);
		2122	fs_fd = inotify_init ();
		2123
		2124	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2125	{
		2126	WL w_ = fs_hash [slot].head;
		2127	fs_hash [slot].head = 0;
		2128
		2129	while (w_)
		2130	{
		2131	ev_stat *w = (ev_stat *)w_;
		2132	w_ = w_->next; /* lets us add this watcher */
		2133
		2134	w->wd = -1;
		2135
		2136	if (fs_fd >= 0)
		2137	infy_add (EV_A_ w); /* re-add, no matter what */
		2138	else
		2139	ev_timer_start (EV_A_ &w->timer);
		2140	}
		2141
		2142	}
		2143	}
		2144
		2145	#endif
		2146
		2147	void
		2148	ev_stat_stat (EV_P_ ev_stat *w)
		2149	{
		2150	if (lstat (w->path, &w->attr) < 0)
		2151	w->attr.st_nlink = 0;
		2152	else if (!w->attr.st_nlink)
		2153	w->attr.st_nlink = 1;
		2154	}
		2155
		2156	static void noinline
		2157	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2158	{
		2159	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2160
		2161	/* we copy this here each the time so that */
		2162	/* prev has the old value when the callback gets invoked */
		2163	w->prev = w->attr;
		2164	ev_stat_stat (EV_A_ w);
		2165
		2166	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2167	if (
		2168	w->prev.st_dev != w->attr.st_dev
		2169	|| w->prev.st_ino != w->attr.st_ino
		2170	|| w->prev.st_mode != w->attr.st_mode
		2171	|| w->prev.st_nlink != w->attr.st_nlink
		2172	|| w->prev.st_uid != w->attr.st_uid
		2173	|| w->prev.st_gid != w->attr.st_gid
		2174	|| w->prev.st_rdev != w->attr.st_rdev
		2175	|| w->prev.st_size != w->attr.st_size
		2176	|| w->prev.st_atime != w->attr.st_atime
		2177	|| w->prev.st_mtime != w->attr.st_mtime
		2178	|| w->prev.st_ctime != w->attr.st_ctime
		2179	) {
		2180	#if EV_USE_INOTIFY
		2181	infy_del (EV_A_ w);
		2182	infy_add (EV_A_ w);
		2183	ev_stat_stat (EV_A_ w); /* avoid race... */
		2184	#endif
		2185
		2186	ev_feed_event (EV_A_ w, EV_STAT);
		2187	}
		2188	}
		2189
		2190	void
		2191	ev_stat_start (EV_P_ ev_stat *w)
		2192	{
		2193	if (expect_false (ev_is_active (w)))
		2194	return;
		2195
		2196	/* since we use memcmp, we need to clear any padding data etc. */
		2197	memset (&w->prev, 0, sizeof (ev_statdata));
		2198	memset (&w->attr, 0, sizeof (ev_statdata));
		2199
		2200	ev_stat_stat (EV_A_ w);
		2201
		2202	if (w->interval < MIN_STAT_INTERVAL)
		2203	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2204
		2205	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2206	ev_set_priority (&w->timer, ev_priority (w));
		2207
		2208	#if EV_USE_INOTIFY
		2209	infy_init (EV_A);
		2210
		2211	if (fs_fd >= 0)
		2212	infy_add (EV_A_ w);
		2213	else
		2214	#endif
		2215	ev_timer_start (EV_A_ &w->timer);
		2216
		2217	ev_start (EV_A_ (W)w, 1);
		2218	}
		2219
		2220	void
		2221	ev_stat_stop (EV_P_ ev_stat *w)
		2222	{
		2223	clear_pending (EV_A_ (W)w);
		2224	if (expect_false (!ev_is_active (w)))
		2225	return;
		2226
		2227	#if EV_USE_INOTIFY
		2228	infy_del (EV_A_ w);
		2229	#endif
		2230	ev_timer_stop (EV_A_ &w->timer);
		2231
		2232	ev_stop (EV_A_ (W)w);
		2233	}
		2234	#endif
		2235
		2236	#if EV_IDLE_ENABLE
		2237	void
		2238	ev_idle_start (EV_P_ ev_idle *w)
		2239	{
		2240	if (expect_false (ev_is_active (w)))
		2241	return;
		2242
		2243	pri_adjust (EV_A_ (W)w);
		2244
		2245	{
		2246	int active = ++idlecnt [ABSPRI (w)];
		2247
		2248	++idleall;
		2249	ev_start (EV_A_ (W)w, active);
		2250
		2251	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2252	idles [ABSPRI (w)][active - 1] = w;
		2253	}
		2254	}
		2255
		2256	void
		2257	ev_idle_stop (EV_P_ ev_idle *w)
		2258	{
		2259	clear_pending (EV_A_ (W)w);
		2260	if (expect_false (!ev_is_active (w)))
		2261	return;
		2262
		2263	{
		2264	int active = ((W)w)->active;
		2265
		2266	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2267	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2268
		2269	ev_stop (EV_A_ (W)w);
		2270	--idleall;
		2271	}
		2272	}
		2273	#endif
		2274
		2275	void
		2276	ev_prepare_start (EV_P_ ev_prepare *w)
		2277	{
		2278	if (expect_false (ev_is_active (w)))
		2279	return;
		2280
		2281	ev_start (EV_A_ (W)w, ++preparecnt);
		2282	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2283	prepares [preparecnt - 1] = w;
		2284	}
		2285
		2286	void
		2287	ev_prepare_stop (EV_P_ ev_prepare *w)
		2288	{
		2289	clear_pending (EV_A_ (W)w);
		2290	if (expect_false (!ev_is_active (w)))
		2291	return;
		2292
		2293	{
		2294	int active = ((W)w)->active;
		2295	prepares [active - 1] = prepares [--preparecnt];
		2296	((W)prepares [active - 1])->active = active;
		2297	}
		2298
		2299	ev_stop (EV_A_ (W)w);
		2300	}
		2301
		2302	void
		2303	ev_check_start (EV_P_ ev_check *w)
		2304	{
		2305	if (expect_false (ev_is_active (w)))
		2306	return;
		2307
		2308	ev_start (EV_A_ (W)w, ++checkcnt);
		2309	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2310	checks [checkcnt - 1] = w;
		2311	}
		2312
		2313	void
		2314	ev_check_stop (EV_P_ ev_check *w)
		2315	{
		2316	clear_pending (EV_A_ (W)w);
		2317	if (expect_false (!ev_is_active (w)))
		2318	return;
		2319
		2320	{
		2321	int active = ((W)w)->active;
		2322	checks [active - 1] = checks [--checkcnt];
		2323	((W)checks [active - 1])->active = active;
		2324	}
		2325
		2326	ev_stop (EV_A_ (W)w);
		2327	}
		2328
		2329	#if EV_EMBED_ENABLE
		2330	void noinline
		2331	ev_embed_sweep (EV_P_ ev_embed *w)
		2332	{
		2333	ev_loop (w->other, EVLOOP_NONBLOCK);
408	}	2334	}
409		2335
410	static void	2336	static void
411	ev_stop (struct ev_watcher *w)	2337	embed_io_cb (EV_P_ ev_io *io, int revents)
412	{	2338	{
413	if (w->pending)	2339	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
414	pendings [w->pending - 1].w = 0;
415		2340
416	w->active = 0;
417	/* nop */
418	}
419
420	void
421	evio_start (struct ev_io *w)
422	{
423	if (ev_is_active (w))	2341	if (ev_cb (w))
424	return;	2342	ev_feed_event (EV_A_ (W)w, EV_EMBED);
425
426	int fd = w->fd;
427
428	ev_start ((struct ev_watcher *)w, 1);
429	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
430	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
431
432	++fdchangecnt;
433	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
434	fdchanges [fdchangecnt - 1] = fd;
435	}
436
437	void
438	evio_stop (struct ev_io *w)
439	{
440	if (!ev_is_active (w))
441	return;
442
443	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
444	ev_stop ((struct ev_watcher *)w);
445
446	++fdchangecnt;
447	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
448	fdchanges [fdchangecnt - 1] = w->fd;
449	}
450
451	void
452	evtimer_start (struct ev_timer *w)
453	{
454	if (ev_is_active (w))
455	return;
456
457	if (w->is_abs)
458	{
459	/* this formula differs from the one in timer_reify becuse we do not round up */
460	if (w->repeat)
461	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
462
463	ev_start ((struct ev_watcher *)w, ++atimercnt);
464	array_needsize (atimers, atimermax, atimercnt, );
465	atimers [atimercnt - 1] = w;
466	upheap (atimers, atimercnt - 1);
467	}
468	else	2343	else
		2344	ev_loop (w->other, EVLOOP_NONBLOCK);
		2345	}
		2346
		2347	static void
		2348	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2349	{
		2350	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2351
469	{	2352	{
470	w->at += now;	2353	struct ev_loop *loop = w->other;
471		2354
472	ev_start ((struct ev_watcher *)w, ++rtimercnt);	2355	while (fdchangecnt)
473	array_needsize (rtimers, rtimermax, rtimercnt, );
474	rtimers [rtimercnt - 1] = w;
475	upheap (rtimers, rtimercnt - 1);
476	}
477
478	}
479
480	void
481	evtimer_stop (struct ev_timer *w)
482	{
483	if (!ev_is_active (w))
484	return;
485
486	if (w->is_abs)
487	{
488	if (w->active < atimercnt--)
489	{	2356	{
490	atimers [w->active - 1] = atimers [atimercnt];	2357	fd_reify (EV_A);
491	downheap (atimers, atimercnt, w->active - 1);	2358	ev_loop (EV_A_ EVLOOP_NONBLOCK);
492	}	2359	}
493	}	2360	}
494	else
495	{
496	if (w->active < rtimercnt--)
497	{
498	rtimers [w->active - 1] = rtimers [rtimercnt];
499	downheap (rtimers, rtimercnt, w->active - 1);
500	}
501	}
502
503	ev_stop ((struct ev_watcher *)w);
504	}	2361	}
505		2362
506	void	2363	#if 0
507	evsignal_start (struct ev_signal *w)	2364	static void
		2365	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
508	{	2366	{
		2367	ev_idle_stop (EV_A_ idle);
		2368	}
		2369	#endif
		2370
		2371	void
		2372	ev_embed_start (EV_P_ ev_embed *w)
		2373	{
509	if (ev_is_active (w))	2374	if (expect_false (ev_is_active (w)))
510	return;	2375	return;
511		2376
512	ev_start ((struct ev_watcher *)w, 1);	2377	{
513	array_needsize (signals, signalmax, w->signum, signals_init);	2378	struct ev_loop *loop = w->other;
514	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2379	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
515	}	2380	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2381	}
516		2382
		2383	ev_set_priority (&w->io, ev_priority (w));
		2384	ev_io_start (EV_A_ &w->io);
		2385
		2386	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2387	ev_set_priority (&w->prepare, EV_MINPRI);
		2388	ev_prepare_start (EV_A_ &w->prepare);
		2389
		2390	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2391
		2392	ev_start (EV_A_ (W)w, 1);
		2393	}
		2394
517	void	2395	void
518	evsignal_stop (struct ev_signal *w)	2396	ev_embed_stop (EV_P_ ev_embed *w)
519	{	2397	{
		2398	clear_pending (EV_A_ (W)w);
520	if (!ev_is_active (w))	2399	if (expect_false (!ev_is_active (w)))
521	return;	2400	return;
522		2401
523	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2402	ev_io_stop (EV_A_ &w->io);
524	ev_stop ((struct ev_watcher *)w);	2403	ev_prepare_stop (EV_A_ &w->prepare);
		2404
		2405	ev_stop (EV_A_ (W)w);
525	}	2406	}
		2407	#endif
		2408
		2409	#if EV_FORK_ENABLE
		2410	void
		2411	ev_fork_start (EV_P_ ev_fork *w)
		2412	{
		2413	if (expect_false (ev_is_active (w)))
		2414	return;
		2415
		2416	ev_start (EV_A_ (W)w, ++forkcnt);
		2417	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2418	forks [forkcnt - 1] = w;
		2419	}
		2420
		2421	void
		2422	ev_fork_stop (EV_P_ ev_fork *w)
		2423	{
		2424	clear_pending (EV_A_ (W)w);
		2425	if (expect_false (!ev_is_active (w)))
		2426	return;
		2427
		2428	{
		2429	int active = ((W)w)->active;
		2430	forks [active - 1] = forks [--forkcnt];
		2431	((W)forks [active - 1])->active = active;
		2432	}
		2433
		2434	ev_stop (EV_A_ (W)w);
		2435	}
		2436	#endif
		2437
		2438	#if EV_ASYNC_ENABLE
		2439	void
		2440	ev_async_start (EV_P_ ev_async *w)
		2441	{
		2442	if (expect_false (ev_is_active (w)))
		2443	return;
		2444
		2445	evpipe_init (EV_A);
		2446
		2447	ev_start (EV_A_ (W)w, ++asynccnt);
		2448	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2449	asyncs [asynccnt - 1] = w;
		2450	}
		2451
		2452	void
		2453	ev_async_stop (EV_P_ ev_async *w)
		2454	{
		2455	clear_pending (EV_A_ (W)w);
		2456	if (expect_false (!ev_is_active (w)))
		2457	return;
		2458
		2459	{
		2460	int active = ((W)w)->active;
		2461	asyncs [active - 1] = asyncs [--asynccnt];
		2462	((W)asyncs [active - 1])->active = active;
		2463	}
		2464
		2465	ev_stop (EV_A_ (W)w);
		2466	}
		2467
		2468	void
		2469	ev_async_send (EV_P_ ev_async *w)
		2470	{
		2471	w->sent = 1;
		2472	evpipe_write (EV_A_ 0, 1);
		2473	}
		2474	#endif
526		2475
527	/*****************************************************************************/	2476	/*****************************************************************************/
528	#if 1	2477
		2478	struct ev_once
		2479	{
		2480	ev_io io;
		2481	ev_timer to;
		2482	void (*cb)(int revents, void *arg);
		2483	void *arg;
		2484	};
529		2485
530	static void	2486	static void
531	sin_cb (struct ev_io *w, int revents)	2487	once_cb (EV_P_ struct ev_once *once, int revents)
532	{	2488	{
533	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2489	void (*cb)(int revents, void *arg) = once->cb;
		2490	void *arg = once->arg;
		2491
		2492	ev_io_stop (EV_A_ &once->io);
		2493	ev_timer_stop (EV_A_ &once->to);
		2494	ev_free (once);
		2495
		2496	cb (revents, arg);
534	}	2497	}
535		2498
536	static void	2499	static void
		2500	once_cb_io (EV_P_ ev_io *w, int revents)
		2501	{
		2502	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2503	}
		2504
		2505	static void
537	ocb (struct ev_timer *w, int revents)	2506	once_cb_to (EV_P_ ev_timer *w, int revents)
538	{	2507	{
539	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2508	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
540	evtimer_stop (w);
541	evtimer_start (w);
542	}	2509	}
543		2510
544	int main (void)	2511	void
		2512	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
545	{	2513	{
546	struct ev_io sin;	2514	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
547		2515
548	ev_init (0);	2516	if (expect_false (!once))
549
550	evw_init (&sin, sin_cb, 55);
551	evio_set (&sin, 0, EV_READ);
552	evio_start (&sin);
553
554	struct ev_timer t[10000];
555
556	#if 1
557	int i;
558	for (i = 0; i < 10000; ++i)
559	{
560	struct ev_timer *w = t + i;
561	evw_init (w, ocb, i);
562	evtimer_set_abs (w, drand48 (), 0.99775533);
563	evtimer_start (w);
564	if (drand48 () < 0.5)
565	evtimer_stop (w);
566	}	2517	{
567	#endif	2518	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
568
569	struct ev_timer t1;
570	evw_init (&t1, ocb, 0);
571	evtimer_set_abs (&t1, 5, 10);
572	evtimer_start (&t1);
573
574	ev_loop (0);
575
576	return 0;	2519	return;
577	}	2520	}
578		2521
579	#endif	2522	once->cb = cb;
		2523	once->arg = arg;
580		2524
		2525	ev_init (&once->io, once_cb_io);
		2526	if (fd >= 0)
		2527	{
		2528	ev_io_set (&once->io, fd, events);
		2529	ev_io_start (EV_A_ &once->io);
		2530	}
581		2531
		2532	ev_init (&once->to, once_cb_to);
		2533	if (timeout >= 0.)
		2534	{
		2535	ev_timer_set (&once->to, timeout, 0.);
		2536	ev_timer_start (EV_A_ &once->to);
		2537	}
		2538	}
582		2539
		2540	#if EV_MULTIPLICITY
		2541	#include "ev_wrap.h"
		2542	#endif
583		2543
		2544	#ifdef __cplusplus
		2545	}
		2546	#endif
		2547

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