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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 1.212 by root, Tue Feb 19 19:01:13 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	}
		818
		819	void inline_size
		820	evpipe_write (EV_P_ int sig, int async)
		821	{
		822	if (!(gotasync || gotsig))
		823	{
		824	int old_errno = errno; /* save errno becaue write might clobber it */
		825
		826	if (sig) gotsig = 1;
		827	if (async) gotasync = 1;
		828
		829	write (evpipe [1], &old_errno, 1);
		830
		831	errno = old_errno;
		832	}
		833	}
92		834
93	static void	835	static void
94	anfds_init (ANFD *base, int count)	836	pipecb (EV_P_ ev_io *iow, int revents)
95	{	837	{
96	while (count--)	838	{
		839	int dummy;
		840	read (evpipe [0], &dummy, 1);
		841	}
		842
		843	if (gotsig && ev_is_default_loop (EV_A))
		844	{
		845	int signum;
		846	gotsig = 0;
		847
		848	for (signum = signalmax; signum--; )
		849	if (signals [signum].gotsig)
		850	ev_feed_signal_event (EV_A_ signum + 1);
97	{	851	}
98	base->head = 0;	852
99	base->wev = base->rev = EV_NONE;	853	#if EV_ASYNC_ENABLE
100	++base;	854	if (gotasync)
101	}	855	{
102	}	856	int i;
		857	gotasync = 0;
103		858
104	typedef struct	859	for (i = asynccnt; i--; )
105	{	860	if (asyncs [i]->sent)
106	struct ev_watcher *w;	861	{
107	int events;	862	asyncs [i]->sent = 0;
108	} ANPENDING;	863	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		864	}
		865	}
		866	#endif
		867	}
109		868
110	static ANPENDING *pendings;	869	/*****************************************************************************/
111	static int pendingmax, pendingcnt;
112		870
113	static void	871	static void
114	event (struct ev_watcher *w, int events)	872	sighandler (int signum)
115	{	873	{
116	w->pending = ++pendingcnt;	874	#if EV_MULTIPLICITY
117	array_needsize (pendings, pendingmax, pendingcnt, );	875	struct ev_loop *loop = &default_loop_struct;
118	pendings [pendingcnt - 1].w = w;	876	#endif
119	pendings [pendingcnt - 1].events = events;	877
		878	#if _WIN32
		879	signal (signum, sighandler);
		880	#endif
		881
		882	signals [signum - 1].gotsig = 1;
		883	evpipe_write (EV_A_ 1, 0);
120	}	884	}
		885
		886	void noinline
		887	ev_feed_signal_event (EV_P_ int signum)
		888	{
		889	WL w;
		890
		891	#if EV_MULTIPLICITY
		892	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		893	#endif
		894
		895	--signum;
		896
		897	if (signum < 0 || signum >= signalmax)
		898	return;
		899
		900	signals [signum].gotsig = 0;
		901
		902	for (w = signals [signum].head; w; w = w->next)
		903	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		904	}
		905
		906	/*****************************************************************************/
		907
		908	static WL childs [EV_PID_HASHSIZE];
		909
		910	#ifndef _WIN32
		911
		912	static ev_signal childev;
		913
		914	#ifndef WIFCONTINUED
		915	# define WIFCONTINUED(status) 0
		916	#endif
		917
		918	void inline_speed
		919	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		920	{
		921	ev_child *w;
		922	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		923
		924	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		925	{
		926	if ((w->pid == pid || !w->pid)
		927	&& (!traced || (w->flags & 1)))
		928	{
		929	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		930	w->rpid = pid;
		931	w->rstatus = status;
		932	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		933	}
		934	}
		935	}
		936
		937	#ifndef WCONTINUED
		938	# define WCONTINUED 0
		939	#endif
121		940
122	static void	941	static void
123	fd_event (int fd, int events)	942	childcb (EV_P_ ev_signal *sw, int revents)
124	{	943	{
125	ANFD *anfd = anfds + fd;	944	int pid, status;
126	struct ev_io *w;
127		945
128	for (w = anfd->head; w; w = w->next)	946	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
129	{	947	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
130	int ev = w->events & events;	948	if (!WCONTINUED
		949	|| errno != EINVAL
		950	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		951	return;
131		952
132	if (ev)	953	/* make sure we are called again until all childs have been reaped */
133	event ((struct ev_watcher *)w, ev);	954	/* we need to do it this way so that the callback gets called before we continue */
134	}	955	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
135	}
136		956
137	static struct ev_timer **atimers;	957	child_reap (EV_A_ sw, pid, pid, status);
138	static int atimermax, atimercnt;	958	if (EV_PID_HASHSIZE > 1)
139		959	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	}	960	}
159		961
160	static void	962	#endif
161	downheap (struct ev_timer **timers, int N, int k)
162	{
163	struct ev_timer *w = timers [k];
164		963
165	while (k < (N >> 1))	964	/*****************************************************************************/
166	{
167	int j = k << 1;
168		965
169	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	966	#if EV_USE_PORT
170	++j;	967	# include "ev_port.c"
171		968	#endif
172	if (w->at <= timers [j]->at)	969	#if EV_USE_KQUEUE
173	break;	970	# include "ev_kqueue.c"
174		971	#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	972	#if EV_USE_EPOLL
195	# include "ev_epoll.c"	973	# include "ev_epoll.c"
196	#endif	974	#endif
		975	#if EV_USE_POLL
		976	# include "ev_poll.c"
		977	#endif
197	#if HAVE_SELECT	978	#if EV_USE_SELECT
198	# include "ev_select.c"	979	# include "ev_select.c"
199	#endif	980	#endif
200		981
201	int ev_init (int flags)	982	int
		983	ev_version_major (void)
202	{	984	{
		985	return EV_VERSION_MAJOR;
		986	}
		987
		988	int
		989	ev_version_minor (void)
		990	{
		991	return EV_VERSION_MINOR;
		992	}
		993
		994	/* return true if we are running with elevated privileges and should ignore env variables */
		995	int inline_size
		996	enable_secure (void)
		997	{
		998	#ifdef _WIN32
		999	return 0;
		1000	#else
		1001	return getuid () != geteuid ()
		1002	|| getgid () != getegid ();
		1003	#endif
		1004	}
		1005
		1006	unsigned int
		1007	ev_supported_backends (void)
		1008	{
		1009	unsigned int flags = 0;
		1010
		1011	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1012	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1013	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1014	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1015	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1016
		1017	return flags;
		1018	}
		1019
		1020	unsigned int
		1021	ev_recommended_backends (void)
		1022	{
		1023	unsigned int flags = ev_supported_backends ();
		1024
		1025	#ifndef __NetBSD__
		1026	/* kqueue is borked on everything but netbsd apparently */
		1027	/* it usually doesn't work correctly on anything but sockets and pipes */
		1028	flags &= ~EVBACKEND_KQUEUE;
		1029	#endif
		1030	#ifdef __APPLE__
		1031	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1032	flags &= ~EVBACKEND_POLL;
		1033	#endif
		1034
		1035	return flags;
		1036	}
		1037
		1038	unsigned int
		1039	ev_embeddable_backends (void)
		1040	{
		1041	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1042
		1043	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1044	/* please fix it and tell me how to detect the fix */
		1045	flags &= ~EVBACKEND_EPOLL;
		1046
		1047	return flags;
		1048	}
		1049
		1050	unsigned int
		1051	ev_backend (EV_P)
		1052	{
		1053	return backend;
		1054	}
		1055
		1056	unsigned int
		1057	ev_loop_count (EV_P)
		1058	{
		1059	return loop_count;
		1060	}
		1061
		1062	void
		1063	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1064	{
		1065	io_blocktime = interval;
		1066	}
		1067
		1068	void
		1069	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1070	{
		1071	timeout_blocktime = interval;
		1072	}
		1073
		1074	static void noinline
		1075	loop_init (EV_P_ unsigned int flags)
		1076	{
		1077	if (!backend)
		1078	{
203	#if HAVE_MONOTONIC	1079	#if EV_USE_MONOTONIC
204	{	1080	{
205	struct timespec ts;	1081	struct timespec ts;
206	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1082	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
207	have_monotonic = 1;	1083	have_monotonic = 1;
208	}	1084	}
209	#endif	1085	#endif
210		1086
211	ev_now = ev_time ();	1087	ev_rt_now = ev_time ();
212	now = get_clock ();	1088	mn_now = get_clock ();
213	diff = ev_now - now;	1089	now_floor = mn_now;
		1090	rtmn_diff = ev_rt_now - mn_now;
214		1091
		1092	io_blocktime = 0.;
		1093	timeout_blocktime = 0.;
		1094	backend = 0;
		1095	backend_fd = -1;
		1096	gotasync = 0;
		1097	#if EV_USE_INOTIFY
		1098	fs_fd = -2;
		1099	#endif
		1100
		1101	/* pid check not overridable via env */
		1102	#ifndef _WIN32
		1103	if (flags & EVFLAG_FORKCHECK)
		1104	curpid = getpid ();
		1105	#endif
		1106
		1107	if (!(flags & EVFLAG_NOENV)
		1108	&& !enable_secure ()
		1109	&& getenv ("LIBEV_FLAGS"))
		1110	flags = atoi (getenv ("LIBEV_FLAGS"));
		1111
		1112	if (!(flags & 0x0000ffffUL))
		1113	flags |= ev_recommended_backends ();
		1114
		1115	#if EV_USE_PORT
		1116	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1117	#endif
		1118	#if EV_USE_KQUEUE
		1119	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1120	#endif
215	#if HAVE_EPOLL	1121	#if EV_USE_EPOLL
216	if (epoll_init (flags))	1122	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
217	return ev_method;
218	#endif	1123	#endif
		1124	#if EV_USE_POLL
		1125	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1126	#endif
219	#if HAVE_SELECT	1127	#if EV_USE_SELECT
220	if (select_init (flags))	1128	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
221	return ev_method;
222	#endif	1129	#endif
223		1130
224	ev_method = EVMETHOD_NONE;	1131	ev_init (&pipeev, pipecb);
225	return ev_method;	1132	ev_set_priority (&pipeev, EV_MAXPRI);
		1133	}
226	}	1134	}
227		1135
228	void ev_prefork (void)	1136	static void noinline
229	{	1137	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	{	1138	{
246	int i;	1139	int i;
247		1140
248	for (i = 0; i < pendingcnt; ++i)	1141	if (ev_is_active (&pipeev))
		1142	{
		1143	ev_ref (EV_A); /* signal watcher */
		1144	ev_io_stop (EV_A_ &pipeev);
		1145
		1146	close (evpipe [0]); evpipe [0] = 0;
		1147	close (evpipe [1]); evpipe [1] = 0;
249	{	1148	}
250	ANPENDING *p = pendings + i;
251		1149
252	if (p->w)	1150	#if EV_USE_INOTIFY
		1151	if (fs_fd >= 0)
		1152	close (fs_fd);
		1153	#endif
		1154
		1155	if (backend_fd >= 0)
		1156	close (backend_fd);
		1157
		1158	#if EV_USE_PORT
		1159	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1160	#endif
		1161	#if EV_USE_KQUEUE
		1162	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1163	#endif
		1164	#if EV_USE_EPOLL
		1165	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1166	#endif
		1167	#if EV_USE_POLL
		1168	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1169	#endif
		1170	#if EV_USE_SELECT
		1171	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1172	#endif
		1173
		1174	for (i = NUMPRI; i--; )
		1175	{
		1176	array_free (pending, [i]);
		1177	#if EV_IDLE_ENABLE
		1178	array_free (idle, [i]);
		1179	#endif
		1180	}
		1181
		1182	ev_free (anfds); anfdmax = 0;
		1183
		1184	/* have to use the microsoft-never-gets-it-right macro */
		1185	array_free (fdchange, EMPTY);
		1186	array_free (timer, EMPTY);
		1187	#if EV_PERIODIC_ENABLE
		1188	array_free (periodic, EMPTY);
		1189	#endif
		1190	#if EV_FORK_ENABLE
		1191	array_free (fork, EMPTY);
		1192	#endif
		1193	array_free (prepare, EMPTY);
		1194	array_free (check, EMPTY);
		1195	#if EV_ASYNC_ENABLE
		1196	array_free (async, EMPTY);
		1197	#endif
		1198
		1199	backend = 0;
		1200	}
		1201
		1202	void inline_size infy_fork (EV_P);
		1203
		1204	void inline_size
		1205	loop_fork (EV_P)
		1206	{
		1207	#if EV_USE_PORT
		1208	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1209	#endif
		1210	#if EV_USE_KQUEUE
		1211	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1212	#endif
		1213	#if EV_USE_EPOLL
		1214	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1215	#endif
		1216	#if EV_USE_INOTIFY
		1217	infy_fork (EV_A);
		1218	#endif
		1219
		1220	if (ev_is_active (&pipeev))
		1221	{
		1222	/* this "locks" the handlers against writing to the pipe */
		1223	/* while we modify the fd vars */
		1224	gotsig = 1;
		1225	#if EV_ASYNC_ENABLE
		1226	gotasync = 1;
		1227	#endif
		1228
		1229	ev_ref (EV_A);
		1230	ev_io_stop (EV_A_ &pipeev);
		1231	close (evpipe [0]);
		1232	close (evpipe [1]);
		1233
		1234	evpipe_init (EV_A);
		1235	/* now iterate over everything, in case we missed something */
		1236	pipecb (EV_A_ &pipeev, EV_READ);
		1237	}
		1238
		1239	postfork = 0;
		1240	}
		1241
		1242	#if EV_MULTIPLICITY
		1243	struct ev_loop *
		1244	ev_loop_new (unsigned int flags)
		1245	{
		1246	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1247
		1248	memset (loop, 0, sizeof (struct ev_loop));
		1249
		1250	loop_init (EV_A_ flags);
		1251
		1252	if (ev_backend (EV_A))
		1253	return loop;
		1254
		1255	return 0;
		1256	}
		1257
		1258	void
		1259	ev_loop_destroy (EV_P)
		1260	{
		1261	loop_destroy (EV_A);
		1262	ev_free (loop);
		1263	}
		1264
		1265	void
		1266	ev_loop_fork (EV_P)
		1267	{
		1268	postfork = 1; /* must be in line with ev_default_fork */
		1269	}
		1270
		1271	#endif
		1272
		1273	#if EV_MULTIPLICITY
		1274	struct ev_loop *
		1275	ev_default_loop_init (unsigned int flags)
		1276	#else
		1277	int
		1278	ev_default_loop (unsigned int flags)
		1279	#endif
		1280	{
		1281	if (!ev_default_loop_ptr)
		1282	{
		1283	#if EV_MULTIPLICITY
		1284	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1285	#else
		1286	ev_default_loop_ptr = 1;
		1287	#endif
		1288
		1289	loop_init (EV_A_ flags);
		1290
		1291	if (ev_backend (EV_A))
253	{	1292	{
254	p->w->pending = 0;	1293	#ifndef _WIN32
255	p->w->cb (p->w, p->events);	1294	ev_signal_init (&childev, childcb, SIGCHLD);
		1295	ev_set_priority (&childev, EV_MAXPRI);
		1296	ev_signal_start (EV_A_ &childev);
		1297	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1298	#endif
256	}	1299	}
		1300	else
		1301	ev_default_loop_ptr = 0;
		1302	}
		1303
		1304	return ev_default_loop_ptr;
		1305	}
		1306
		1307	void
		1308	ev_default_destroy (void)
		1309	{
		1310	#if EV_MULTIPLICITY
		1311	struct ev_loop *loop = ev_default_loop_ptr;
		1312	#endif
		1313
		1314	#ifndef _WIN32
		1315	ev_ref (EV_A); /* child watcher */
		1316	ev_signal_stop (EV_A_ &childev);
		1317	#endif
		1318
		1319	loop_destroy (EV_A);
		1320	}
		1321
		1322	void
		1323	ev_default_fork (void)
		1324	{
		1325	#if EV_MULTIPLICITY
		1326	struct ev_loop *loop = ev_default_loop_ptr;
		1327	#endif
		1328
		1329	if (backend)
		1330	postfork = 1; /* must be in line with ev_loop_fork */
		1331	}
		1332
		1333	/*****************************************************************************/
		1334
		1335	void
		1336	ev_invoke (EV_P_ void *w, int revents)
		1337	{
		1338	EV_CB_INVOKE ((W)w, revents);
		1339	}
		1340
		1341	void inline_speed
		1342	call_pending (EV_P)
		1343	{
		1344	int pri;
		1345
		1346	for (pri = NUMPRI; pri--; )
		1347	while (pendingcnt [pri])
		1348	{
		1349	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1350
		1351	if (expect_true (p->w))
		1352	{
		1353	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1354
		1355	p->w->pending = 0;
		1356	EV_CB_INVOKE (p->w, p->events);
		1357	}
257	}	1358	}
258
259	pendingcnt = 0;
260	}	1359	}
261		1360
262	static void	1361	void inline_size
263	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1362	timers_reify (EV_P)
264	{	1363	{
265	while (timercnt && timers [0]->at <= now)	1364	while (timercnt && ((WT)timers [0])->at <= mn_now)
266	{	1365	{
267	struct ev_timer *w = timers [0];	1366	ev_timer *w = (ev_timer *)timers [0];
		1367
		1368	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
268		1369
269	/* first reschedule or stop timer */	1370	/* first reschedule or stop timer */
270	if (w->repeat)	1371	if (w->repeat)
271	{	1372	{
272	if (w->is_abs)	1373	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;	1374
274	else
275	w->at = now + w->repeat;	1375	((WT)w)->at += w->repeat;
276		1376	if (((WT)w)->at < mn_now)
277	assert (w->at > now);	1377	((WT)w)->at = mn_now;
278		1378
279	downheap (timers, timercnt, 0);	1379	downheap (timers, timercnt, 0);
280	}	1380	}
281	else	1381	else
		1382	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1383
		1384	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1385	}
		1386	}
		1387
		1388	#if EV_PERIODIC_ENABLE
		1389	void inline_size
		1390	periodics_reify (EV_P)
		1391	{
		1392	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1393	{
		1394	ev_periodic *w = (ev_periodic *)periodics [0];
		1395
		1396	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1397
		1398	/* first reschedule or stop timer */
		1399	if (w->reschedule_cb)
282	{	1400	{
283	evtimer_stop (w); /* nonrepeating: stop timer */	1401	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
284	--timercnt; /* maybe pass by reference instead? */	1402	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1403	downheap (periodics, periodiccnt, 0);
285	}	1404	}
		1405	else if (w->interval)
		1406	{
		1407	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1408	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1409	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1410	downheap (periodics, periodiccnt, 0);
		1411	}
		1412	else
		1413	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
286		1414
287	event ((struct ev_watcher *)w, EV_TIMEOUT);	1415	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
288	}	1416	}
289	}	1417	}
290		1418
291	static void	1419	static void noinline
292	time_update ()	1420	periodics_reschedule (EV_P)
293	{	1421	{
294	int i;	1422	int i;
295	ev_now = ev_time ();
296		1423
297	if (have_monotonic)	1424	/* adjust periodics after time jump */
		1425	for (i = 0; i < periodiccnt; ++i)
		1426	{
		1427	ev_periodic *w = (ev_periodic *)periodics [i];
		1428
		1429	if (w->reschedule_cb)
		1430	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1431	else if (w->interval)
		1432	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
298	{	1433	}
299	ev_tstamp odiff = diff;
300		1434
301	/* detecting time jumps is much more difficult */	1435	/* now rebuild the heap */
302	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1436	for (i = periodiccnt >> 1; i--; )
		1437	downheap (periodics, periodiccnt, i);
		1438	}
		1439	#endif
		1440
		1441	#if EV_IDLE_ENABLE
		1442	void inline_size
		1443	idle_reify (EV_P)
		1444	{
		1445	if (expect_false (idleall))
		1446	{
		1447	int pri;
		1448
		1449	for (pri = NUMPRI; pri--; )
303	{	1450	{
		1451	if (pendingcnt [pri])
		1452	break;
		1453
		1454	if (idlecnt [pri])
		1455	{
		1456	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1457	break;
		1458	}
		1459	}
		1460	}
		1461	}
		1462	#endif
		1463
		1464	void inline_speed
		1465	time_update (EV_P_ ev_tstamp max_block)
		1466	{
		1467	int i;
		1468
		1469	#if EV_USE_MONOTONIC
		1470	if (expect_true (have_monotonic))
		1471	{
		1472	ev_tstamp odiff = rtmn_diff;
		1473
304	now = get_clock ();	1474	mn_now = get_clock ();
		1475
		1476	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1477	/* interpolate in the meantime */
		1478	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1479	{
		1480	ev_rt_now = rtmn_diff + mn_now;
		1481	return;
		1482	}
		1483
		1484	now_floor = mn_now;
		1485	ev_rt_now = ev_time ();
		1486
		1487	/* loop a few times, before making important decisions.
		1488	* on the choice of "4": one iteration isn't enough,
		1489	* in case we get preempted during the calls to
		1490	* ev_time and get_clock. a second call is almost guaranteed
		1491	* to succeed in that case, though. and looping a few more times
		1492	* doesn't hurt either as we only do this on time-jumps or
		1493	* in the unlikely event of having been preempted here.
		1494	*/
		1495	for (i = 4; --i; )
		1496	{
305	diff = ev_now - now;	1497	rtmn_diff = ev_rt_now - mn_now;
306		1498
307	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1499	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
308	return; /* all is well */	1500	return; /* all is well */
309		1501
310	ev_now = ev_time ();	1502	ev_rt_now = ev_time ();
		1503	mn_now = get_clock ();
		1504	now_floor = mn_now;
311	}	1505	}
312		1506
313	/* time jump detected, reschedule atimers */	1507	# if EV_PERIODIC_ENABLE
314	for (i = 0; i < atimercnt; ++i)	1508	periodics_reschedule (EV_A);
		1509	# endif
		1510	/* no timer adjustment, as the monotonic clock doesn't jump */
		1511	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1512	}
		1513	else
		1514	#endif
		1515	{
		1516	ev_rt_now = ev_time ();
		1517
		1518	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
315	{	1519	{
316	struct ev_timer *w = atimers [i];	1520	#if EV_PERIODIC_ENABLE
317	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1521	periodics_reschedule (EV_A);
		1522	#endif
		1523	/* adjust timers. this is easy, as the offset is the same for all of them */
		1524	for (i = 0; i < timercnt; ++i)
		1525	((WT)timers [i])->at += ev_rt_now - mn_now;
318	}	1526	}
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		1527
327	now = ev_now;	1528	mn_now = ev_rt_now;
328	}	1529	}
329	}	1530	}
330		1531
331	int ev_loop_done;	1532	void
		1533	ev_ref (EV_P)
		1534	{
		1535	++activecnt;
		1536	}
332		1537
		1538	void
		1539	ev_unref (EV_P)
		1540	{
		1541	--activecnt;
		1542	}
		1543
		1544	static int loop_done;
		1545
		1546	void
333	void ev_loop (int flags)	1547	ev_loop (EV_P_ int flags)
334	{	1548	{
335	double block;
336	ev_loop_done = flags & EVLOOP_ONESHOT;	1549	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1550	? EVUNLOOP_ONE
		1551	: EVUNLOOP_CANCEL;
		1552
		1553	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
337		1554
338	do	1555	do
339	{	1556	{
		1557	#ifndef _WIN32
		1558	if (expect_false (curpid)) /* penalise the forking check even more */
		1559	if (expect_false (getpid () != curpid))
		1560	{
		1561	curpid = getpid ();
		1562	postfork = 1;
		1563	}
		1564	#endif
		1565
		1566	#if EV_FORK_ENABLE
		1567	/* we might have forked, so queue fork handlers */
		1568	if (expect_false (postfork))
		1569	if (forkcnt)
		1570	{
		1571	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1572	call_pending (EV_A);
		1573	}
		1574	#endif
		1575
		1576	/* queue prepare watchers (and execute them) */
		1577	if (expect_false (preparecnt))
		1578	{
		1579	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1580	call_pending (EV_A);
		1581	}
		1582
		1583	if (expect_false (!activecnt))
		1584	break;
		1585
		1586	/* we might have forked, so reify kernel state if necessary */
		1587	if (expect_false (postfork))
		1588	loop_fork (EV_A);
		1589
340	/* update fd-related kernel structures */	1590	/* update fd-related kernel structures */
341	method_reify (); fdchangecnt = 0;	1591	fd_reify (EV_A);
342		1592
343	/* calculate blocking time */	1593	/* calculate blocking time */
344	if (flags & EVLOOP_NONBLOCK)	1594	{
345	block = 0.;	1595	ev_tstamp waittime = 0.;
346	else	1596	ev_tstamp sleeptime = 0.;
		1597
		1598	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
347	{	1599	{
		1600	/* update time to cancel out callback processing overhead */
		1601	time_update (EV_A_ 1e100);
		1602
348	block = MAX_BLOCKTIME;	1603	waittime = MAX_BLOCKTIME;
349		1604
350	if (rtimercnt)	1605	if (timercnt)
351	{	1606	{
352	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1607	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
353	if (block > to) block = to;	1608	if (waittime > to) waittime = to;
354	}	1609	}
355		1610
		1611	#if EV_PERIODIC_ENABLE
356	if (atimercnt)	1612	if (periodiccnt)
357	{	1613	{
358	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1614	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
359	if (block > to) block = to;	1615	if (waittime > to) waittime = to;
360	}	1616	}
		1617	#endif
361		1618
362	if (block < 0.) block = 0.;	1619	if (expect_false (waittime < timeout_blocktime))
		1620	waittime = timeout_blocktime;
		1621
		1622	sleeptime = waittime - backend_fudge;
		1623
		1624	if (expect_true (sleeptime > io_blocktime))
		1625	sleeptime = io_blocktime;
		1626
		1627	if (sleeptime)
		1628	{
		1629	ev_sleep (sleeptime);
		1630	waittime -= sleeptime;
		1631	}
363	}	1632	}
364		1633
365	method_poll (block);	1634	++loop_count;
		1635	backend_poll (EV_A_ waittime);
366		1636
367	/* update ev_now, do magic */	1637	/* update ev_rt_now, do magic */
368	time_update ();	1638	time_update (EV_A_ waittime + sleeptime);
		1639	}
369		1640
370	/* put pending timers into pendign queue and reschedule them */	1641	/* queue pending timers and reschedule them */
371	/* absolute timers first */	1642	timers_reify (EV_A); /* relative timers called last */
372	timers_reify (atimers, atimercnt, ev_now);	1643	#if EV_PERIODIC_ENABLE
373	/* relative timers second */	1644	periodics_reify (EV_A); /* absolute timers called first */
374	timers_reify (rtimers, rtimercnt, now);	1645	#endif
375		1646
		1647	#if EV_IDLE_ENABLE
		1648	/* queue idle watchers unless other events are pending */
		1649	idle_reify (EV_A);
		1650	#endif
		1651
		1652	/* queue check watchers, to be executed first */
		1653	if (expect_false (checkcnt))
		1654	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1655
376	call_pending ();	1656	call_pending (EV_A);
377	}
378	while (!ev_loop_done);
379	}
380		1657
381	static void	1658	}
382	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1659	while (expect_true (activecnt && !loop_done));
		1660
		1661	if (loop_done == EVUNLOOP_ONE)
		1662	loop_done = EVUNLOOP_CANCEL;
		1663	}
		1664
		1665	void
		1666	ev_unloop (EV_P_ int how)
		1667	{
		1668	loop_done = how;
		1669	}
		1670
		1671	/*****************************************************************************/
		1672
		1673	void inline_size
		1674	wlist_add (WL *head, WL elem)
383	{	1675	{
384	elem->next = *head;	1676	elem->next = *head;
385	*head = elem;	1677	*head = elem;
386	}	1678	}
387		1679
388	static void	1680	void inline_size
389	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1681	wlist_del (WL *head, WL elem)
390	{	1682	{
391	while (*head)	1683	while (*head)
392	{	1684	{
393	if (*head == elem)	1685	if (*head == elem)
394	{	1686	{
…		…
398		1690
399	head = &(*head)->next;	1691	head = &(*head)->next;
400	}	1692	}
401	}	1693	}
402		1694
		1695	void inline_speed
		1696	clear_pending (EV_P_ W w)
		1697	{
		1698	if (w->pending)
		1699	{
		1700	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1701	w->pending = 0;
		1702	}
		1703	}
		1704
		1705	int
		1706	ev_clear_pending (EV_P_ void *w)
		1707	{
		1708	W w_ = (W)w;
		1709	int pending = w_->pending;
		1710
		1711	if (expect_true (pending))
		1712	{
		1713	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1714	w_->pending = 0;
		1715	p->w = 0;
		1716	return p->events;
		1717	}
		1718	else
		1719	return 0;
		1720	}
		1721
		1722	void inline_size
		1723	pri_adjust (EV_P_ W w)
		1724	{
		1725	int pri = w->priority;
		1726	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1727	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1728	w->priority = pri;
		1729	}
		1730
		1731	void inline_speed
		1732	ev_start (EV_P_ W w, int active)
		1733	{
		1734	pri_adjust (EV_A_ w);
		1735	w->active = active;
		1736	ev_ref (EV_A);
		1737	}
		1738
		1739	void inline_size
		1740	ev_stop (EV_P_ W w)
		1741	{
		1742	ev_unref (EV_A);
		1743	w->active = 0;
		1744	}
		1745
		1746	/*****************************************************************************/
		1747
		1748	void noinline
		1749	ev_io_start (EV_P_ ev_io *w)
		1750	{
		1751	int fd = w->fd;
		1752
		1753	if (expect_false (ev_is_active (w)))
		1754	return;
		1755
		1756	assert (("ev_io_start called with negative fd", fd >= 0));
		1757
		1758	ev_start (EV_A_ (W)w, 1);
		1759	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1760	wlist_add (&anfds[fd].head, (WL)w);
		1761
		1762	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1763	w->events &= ~EV_IOFDSET;
		1764	}
		1765
		1766	void noinline
		1767	ev_io_stop (EV_P_ ev_io *w)
		1768	{
		1769	clear_pending (EV_A_ (W)w);
		1770	if (expect_false (!ev_is_active (w)))
		1771	return;
		1772
		1773	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1774
		1775	wlist_del (&anfds[w->fd].head, (WL)w);
		1776	ev_stop (EV_A_ (W)w);
		1777
		1778	fd_change (EV_A_ w->fd, 1);
		1779	}
		1780
		1781	void noinline
		1782	ev_timer_start (EV_P_ ev_timer *w)
		1783	{
		1784	if (expect_false (ev_is_active (w)))
		1785	return;
		1786
		1787	((WT)w)->at += mn_now;
		1788
		1789	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1790
		1791	ev_start (EV_A_ (W)w, ++timercnt);
		1792	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1793	timers [timercnt - 1] = (WT)w;
		1794	upheap (timers, timercnt - 1);
		1795
		1796	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1797	}
		1798
		1799	void noinline
		1800	ev_timer_stop (EV_P_ ev_timer *w)
		1801	{
		1802	clear_pending (EV_A_ (W)w);
		1803	if (expect_false (!ev_is_active (w)))
		1804	return;
		1805
		1806	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1807
		1808	{
		1809	int active = ((W)w)->active;
		1810
		1811	if (expect_true (--active < --timercnt))
		1812	{
		1813	timers [active] = timers [timercnt];
		1814	adjustheap (timers, timercnt, active);
		1815	}
		1816	}
		1817
		1818	((WT)w)->at -= mn_now;
		1819
		1820	ev_stop (EV_A_ (W)w);
		1821	}
		1822
		1823	void noinline
		1824	ev_timer_again (EV_P_ ev_timer *w)
		1825	{
		1826	if (ev_is_active (w))
		1827	{
		1828	if (w->repeat)
		1829	{
		1830	((WT)w)->at = mn_now + w->repeat;
		1831	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1832	}
		1833	else
		1834	ev_timer_stop (EV_A_ w);
		1835	}
		1836	else if (w->repeat)
		1837	{
		1838	w->at = w->repeat;
		1839	ev_timer_start (EV_A_ w);
		1840	}
		1841	}
		1842
		1843	#if EV_PERIODIC_ENABLE
		1844	void noinline
		1845	ev_periodic_start (EV_P_ ev_periodic *w)
		1846	{
		1847	if (expect_false (ev_is_active (w)))
		1848	return;
		1849
		1850	if (w->reschedule_cb)
		1851	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1852	else if (w->interval)
		1853	{
		1854	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1855	/* this formula differs from the one in periodic_reify because we do not always round up */
		1856	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1857	}
		1858	else
		1859	((WT)w)->at = w->offset;
		1860
		1861	ev_start (EV_A_ (W)w, ++periodiccnt);
		1862	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
		1863	periodics [periodiccnt - 1] = (WT)w;
		1864	upheap (periodics, periodiccnt - 1);
		1865
		1866	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1867	}
		1868
		1869	void noinline
		1870	ev_periodic_stop (EV_P_ ev_periodic *w)
		1871	{
		1872	clear_pending (EV_A_ (W)w);
		1873	if (expect_false (!ev_is_active (w)))
		1874	return;
		1875
		1876	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1877
		1878	{
		1879	int active = ((W)w)->active;
		1880
		1881	if (expect_true (--active < --periodiccnt))
		1882	{
		1883	periodics [active] = periodics [periodiccnt];
		1884	adjustheap (periodics, periodiccnt, active);
		1885	}
		1886	}
		1887
		1888	ev_stop (EV_A_ (W)w);
		1889	}
		1890
		1891	void noinline
		1892	ev_periodic_again (EV_P_ ev_periodic *w)
		1893	{
		1894	/* TODO: use adjustheap and recalculation */
		1895	ev_periodic_stop (EV_A_ w);
		1896	ev_periodic_start (EV_A_ w);
		1897	}
		1898	#endif
		1899
		1900	#ifndef SA_RESTART
		1901	# define SA_RESTART 0
		1902	#endif
		1903
		1904	void noinline
		1905	ev_signal_start (EV_P_ ev_signal *w)
		1906	{
		1907	#if EV_MULTIPLICITY
		1908	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1909	#endif
		1910	if (expect_false (ev_is_active (w)))
		1911	return;
		1912
		1913	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1914
		1915	evpipe_init (EV_A);
		1916
		1917	{
		1918	#ifndef _WIN32
		1919	sigset_t full, prev;
		1920	sigfillset (&full);
		1921	sigprocmask (SIG_SETMASK, &full, &prev);
		1922	#endif
		1923
		1924	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1925
		1926	#ifndef _WIN32
		1927	sigprocmask (SIG_SETMASK, &prev, 0);
		1928	#endif
		1929	}
		1930
		1931	ev_start (EV_A_ (W)w, 1);
		1932	wlist_add (&signals [w->signum - 1].head, (WL)w);
		1933
		1934	if (!((WL)w)->next)
		1935	{
		1936	#if _WIN32
		1937	signal (w->signum, sighandler);
		1938	#else
		1939	struct sigaction sa;
		1940	sa.sa_handler = sighandler;
		1941	sigfillset (&sa.sa_mask);
		1942	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1943	sigaction (w->signum, &sa, 0);
		1944	#endif
		1945	}
		1946	}
		1947
		1948	void noinline
		1949	ev_signal_stop (EV_P_ ev_signal *w)
		1950	{
		1951	clear_pending (EV_A_ (W)w);
		1952	if (expect_false (!ev_is_active (w)))
		1953	return;
		1954
		1955	wlist_del (&signals [w->signum - 1].head, (WL)w);
		1956	ev_stop (EV_A_ (W)w);
		1957
		1958	if (!signals [w->signum - 1].head)
		1959	signal (w->signum, SIG_DFL);
		1960	}
		1961
		1962	void
		1963	ev_child_start (EV_P_ ev_child *w)
		1964	{
		1965	#if EV_MULTIPLICITY
		1966	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1967	#endif
		1968	if (expect_false (ev_is_active (w)))
		1969	return;
		1970
		1971	ev_start (EV_A_ (W)w, 1);
		1972	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1973	}
		1974
		1975	void
		1976	ev_child_stop (EV_P_ ev_child *w)
		1977	{
		1978	clear_pending (EV_A_ (W)w);
		1979	if (expect_false (!ev_is_active (w)))
		1980	return;
		1981
		1982	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1983	ev_stop (EV_A_ (W)w);
		1984	}
		1985
		1986	#if EV_STAT_ENABLE
		1987
		1988	# ifdef _WIN32
		1989	# undef lstat
		1990	# define lstat(a,b) _stati64 (a,b)
		1991	# endif
		1992
		1993	#define DEF_STAT_INTERVAL 5.0074891
		1994	#define MIN_STAT_INTERVAL 0.1074891
		1995
		1996	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1997
		1998	#if EV_USE_INOTIFY
		1999	# define EV_INOTIFY_BUFSIZE 8192
		2000
		2001	static void noinline
		2002	infy_add (EV_P_ ev_stat *w)
		2003	{
		2004	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);
		2005
		2006	if (w->wd < 0)
		2007	{
		2008	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2009
		2010	/* monitor some parent directory for speedup hints */
		2011	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2012	{
		2013	char path [4096];
		2014	strcpy (path, w->path);
		2015
		2016	do
		2017	{
		2018	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2019	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2020
		2021	char *pend = strrchr (path, '/');
		2022
		2023	if (!pend)
		2024	break; /* whoops, no '/', complain to your admin */
		2025
		2026	*pend = 0;
		2027	w->wd = inotify_add_watch (fs_fd, path, mask);
		2028	}
		2029	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2030	}
		2031	}
		2032	else
		2033	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2034
		2035	if (w->wd >= 0)
		2036	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2037	}
		2038
		2039	static void noinline
		2040	infy_del (EV_P_ ev_stat *w)
		2041	{
		2042	int slot;
		2043	int wd = w->wd;
		2044
		2045	if (wd < 0)
		2046	return;
		2047
		2048	w->wd = -2;
		2049	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2050	wlist_del (&fs_hash [slot].head, (WL)w);
		2051
		2052	/* remove this watcher, if others are watching it, they will rearm */
		2053	inotify_rm_watch (fs_fd, wd);
		2054	}
		2055
		2056	static void noinline
		2057	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2058	{
		2059	if (slot < 0)
		2060	/* overflow, need to check for all hahs slots */
		2061	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2062	infy_wd (EV_A_ slot, wd, ev);
		2063	else
		2064	{
		2065	WL w_;
		2066
		2067	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2068	{
		2069	ev_stat *w = (ev_stat *)w_;
		2070	w_ = w_->next; /* lets us remove this watcher and all before it */
		2071
		2072	if (w->wd == wd || wd == -1)
		2073	{
		2074	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2075	{
		2076	w->wd = -1;
		2077	infy_add (EV_A_ w); /* re-add, no matter what */
		2078	}
		2079
		2080	stat_timer_cb (EV_A_ &w->timer, 0);
		2081	}
		2082	}
		2083	}
		2084	}
		2085
403	static void	2086	static void
404	ev_start (struct ev_watcher *w, int active)	2087	infy_cb (EV_P_ ev_io *w, int revents)
405	{	2088	{
406	w->pending = 0;	2089	char buf [EV_INOTIFY_BUFSIZE];
407	w->active = active;	2090	struct inotify_event *ev = (struct inotify_event *)buf;
		2091	int ofs;
		2092	int len = read (fs_fd, buf, sizeof (buf));
		2093
		2094	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2095	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2096	}
		2097
		2098	void inline_size
		2099	infy_init (EV_P)
		2100	{
		2101	if (fs_fd != -2)
		2102	return;
		2103
		2104	fs_fd = inotify_init ();
		2105
		2106	if (fs_fd >= 0)
		2107	{
		2108	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2109	ev_set_priority (&fs_w, EV_MAXPRI);
		2110	ev_io_start (EV_A_ &fs_w);
		2111	}
		2112	}
		2113
		2114	void inline_size
		2115	infy_fork (EV_P)
		2116	{
		2117	int slot;
		2118
		2119	if (fs_fd < 0)
		2120	return;
		2121
		2122	close (fs_fd);
		2123	fs_fd = inotify_init ();
		2124
		2125	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2126	{
		2127	WL w_ = fs_hash [slot].head;
		2128	fs_hash [slot].head = 0;
		2129
		2130	while (w_)
		2131	{
		2132	ev_stat *w = (ev_stat *)w_;
		2133	w_ = w_->next; /* lets us add this watcher */
		2134
		2135	w->wd = -1;
		2136
		2137	if (fs_fd >= 0)
		2138	infy_add (EV_A_ w); /* re-add, no matter what */
		2139	else
		2140	ev_timer_start (EV_A_ &w->timer);
		2141	}
		2142
		2143	}
		2144	}
		2145
		2146	#endif
		2147
		2148	void
		2149	ev_stat_stat (EV_P_ ev_stat *w)
		2150	{
		2151	if (lstat (w->path, &w->attr) < 0)
		2152	w->attr.st_nlink = 0;
		2153	else if (!w->attr.st_nlink)
		2154	w->attr.st_nlink = 1;
		2155	}
		2156
		2157	static void noinline
		2158	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2159	{
		2160	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2161
		2162	/* we copy this here each the time so that */
		2163	/* prev has the old value when the callback gets invoked */
		2164	w->prev = w->attr;
		2165	ev_stat_stat (EV_A_ w);
		2166
		2167	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2168	if (
		2169	w->prev.st_dev != w->attr.st_dev
		2170	|| w->prev.st_ino != w->attr.st_ino
		2171	|| w->prev.st_mode != w->attr.st_mode
		2172	|| w->prev.st_nlink != w->attr.st_nlink
		2173	|| w->prev.st_uid != w->attr.st_uid
		2174	|| w->prev.st_gid != w->attr.st_gid
		2175	|| w->prev.st_rdev != w->attr.st_rdev
		2176	|| w->prev.st_size != w->attr.st_size
		2177	|| w->prev.st_atime != w->attr.st_atime
		2178	|| w->prev.st_mtime != w->attr.st_mtime
		2179	|| w->prev.st_ctime != w->attr.st_ctime
		2180	) {
		2181	#if EV_USE_INOTIFY
		2182	infy_del (EV_A_ w);
		2183	infy_add (EV_A_ w);
		2184	ev_stat_stat (EV_A_ w); /* avoid race... */
		2185	#endif
		2186
		2187	ev_feed_event (EV_A_ w, EV_STAT);
		2188	}
		2189	}
		2190
		2191	void
		2192	ev_stat_start (EV_P_ ev_stat *w)
		2193	{
		2194	if (expect_false (ev_is_active (w)))
		2195	return;
		2196
		2197	/* since we use memcmp, we need to clear any padding data etc. */
		2198	memset (&w->prev, 0, sizeof (ev_statdata));
		2199	memset (&w->attr, 0, sizeof (ev_statdata));
		2200
		2201	ev_stat_stat (EV_A_ w);
		2202
		2203	if (w->interval < MIN_STAT_INTERVAL)
		2204	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2205
		2206	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2207	ev_set_priority (&w->timer, ev_priority (w));
		2208
		2209	#if EV_USE_INOTIFY
		2210	infy_init (EV_A);
		2211
		2212	if (fs_fd >= 0)
		2213	infy_add (EV_A_ w);
		2214	else
		2215	#endif
		2216	ev_timer_start (EV_A_ &w->timer);
		2217
		2218	ev_start (EV_A_ (W)w, 1);
		2219	}
		2220
		2221	void
		2222	ev_stat_stop (EV_P_ ev_stat *w)
		2223	{
		2224	clear_pending (EV_A_ (W)w);
		2225	if (expect_false (!ev_is_active (w)))
		2226	return;
		2227
		2228	#if EV_USE_INOTIFY
		2229	infy_del (EV_A_ w);
		2230	#endif
		2231	ev_timer_stop (EV_A_ &w->timer);
		2232
		2233	ev_stop (EV_A_ (W)w);
		2234	}
		2235	#endif
		2236
		2237	#if EV_IDLE_ENABLE
		2238	void
		2239	ev_idle_start (EV_P_ ev_idle *w)
		2240	{
		2241	if (expect_false (ev_is_active (w)))
		2242	return;
		2243
		2244	pri_adjust (EV_A_ (W)w);
		2245
		2246	{
		2247	int active = ++idlecnt [ABSPRI (w)];
		2248
		2249	++idleall;
		2250	ev_start (EV_A_ (W)w, active);
		2251
		2252	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2253	idles [ABSPRI (w)][active - 1] = w;
		2254	}
		2255	}
		2256
		2257	void
		2258	ev_idle_stop (EV_P_ ev_idle *w)
		2259	{
		2260	clear_pending (EV_A_ (W)w);
		2261	if (expect_false (!ev_is_active (w)))
		2262	return;
		2263
		2264	{
		2265	int active = ((W)w)->active;
		2266
		2267	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2268	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2269
		2270	ev_stop (EV_A_ (W)w);
		2271	--idleall;
		2272	}
		2273	}
		2274	#endif
		2275
		2276	void
		2277	ev_prepare_start (EV_P_ ev_prepare *w)
		2278	{
		2279	if (expect_false (ev_is_active (w)))
		2280	return;
		2281
		2282	ev_start (EV_A_ (W)w, ++preparecnt);
		2283	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2284	prepares [preparecnt - 1] = w;
		2285	}
		2286
		2287	void
		2288	ev_prepare_stop (EV_P_ ev_prepare *w)
		2289	{
		2290	clear_pending (EV_A_ (W)w);
		2291	if (expect_false (!ev_is_active (w)))
		2292	return;
		2293
		2294	{
		2295	int active = ((W)w)->active;
		2296	prepares [active - 1] = prepares [--preparecnt];
		2297	((W)prepares [active - 1])->active = active;
		2298	}
		2299
		2300	ev_stop (EV_A_ (W)w);
		2301	}
		2302
		2303	void
		2304	ev_check_start (EV_P_ ev_check *w)
		2305	{
		2306	if (expect_false (ev_is_active (w)))
		2307	return;
		2308
		2309	ev_start (EV_A_ (W)w, ++checkcnt);
		2310	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2311	checks [checkcnt - 1] = w;
		2312	}
		2313
		2314	void
		2315	ev_check_stop (EV_P_ ev_check *w)
		2316	{
		2317	clear_pending (EV_A_ (W)w);
		2318	if (expect_false (!ev_is_active (w)))
		2319	return;
		2320
		2321	{
		2322	int active = ((W)w)->active;
		2323	checks [active - 1] = checks [--checkcnt];
		2324	((W)checks [active - 1])->active = active;
		2325	}
		2326
		2327	ev_stop (EV_A_ (W)w);
		2328	}
		2329
		2330	#if EV_EMBED_ENABLE
		2331	void noinline
		2332	ev_embed_sweep (EV_P_ ev_embed *w)
		2333	{
		2334	ev_loop (w->other, EVLOOP_NONBLOCK);
408	}	2335	}
409		2336
410	static void	2337	static void
411	ev_stop (struct ev_watcher *w)	2338	embed_io_cb (EV_P_ ev_io *io, int revents)
412	{	2339	{
413	if (w->pending)	2340	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
414	pendings [w->pending - 1].w = 0;
415		2341
416	w->active = 0;
417	/* nop */
418	}
419
420	void
421	evio_start (struct ev_io *w)
422	{
423	if (ev_is_active (w))	2342	if (ev_cb (w))
424	return;	2343	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	2344	else
		2345	ev_loop (w->other, EVLOOP_NONBLOCK);
		2346	}
		2347
		2348	static void
		2349	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2350	{
		2351	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2352
469	{	2353	{
470	w->at += now;	2354	struct ev_loop *loop = w->other;
471		2355
472	ev_start ((struct ev_watcher *)w, ++rtimercnt);	2356	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	{	2357	{
490	atimers [w->active - 1] = atimers [atimercnt];	2358	fd_reify (EV_A);
491	downheap (atimers, atimercnt, w->active - 1);	2359	ev_loop (EV_A_ EVLOOP_NONBLOCK);
492	}	2360	}
493	}	2361	}
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	}	2362	}
505		2363
506	void	2364	#if 0
507	evsignal_start (struct ev_signal *w)	2365	static void
		2366	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
508	{	2367	{
		2368	ev_idle_stop (EV_A_ idle);
		2369	}
		2370	#endif
		2371
		2372	void
		2373	ev_embed_start (EV_P_ ev_embed *w)
		2374	{
509	if (ev_is_active (w))	2375	if (expect_false (ev_is_active (w)))
510	return;	2376	return;
511		2377
512	ev_start ((struct ev_watcher *)w, 1);	2378	{
513	array_needsize (signals, signalmax, w->signum, signals_init);	2379	struct ev_loop *loop = w->other;
514	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2380	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
515	}	2381	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2382	}
516		2383
		2384	ev_set_priority (&w->io, ev_priority (w));
		2385	ev_io_start (EV_A_ &w->io);
		2386
		2387	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2388	ev_set_priority (&w->prepare, EV_MINPRI);
		2389	ev_prepare_start (EV_A_ &w->prepare);
		2390
		2391	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2392
		2393	ev_start (EV_A_ (W)w, 1);
		2394	}
		2395
517	void	2396	void
518	evsignal_stop (struct ev_signal *w)	2397	ev_embed_stop (EV_P_ ev_embed *w)
519	{	2398	{
		2399	clear_pending (EV_A_ (W)w);
520	if (!ev_is_active (w))	2400	if (expect_false (!ev_is_active (w)))
521	return;	2401	return;
522		2402
523	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2403	ev_io_stop (EV_A_ &w->io);
524	ev_stop ((struct ev_watcher *)w);	2404	ev_prepare_stop (EV_A_ &w->prepare);
		2405
		2406	ev_stop (EV_A_ (W)w);
525	}	2407	}
		2408	#endif
		2409
		2410	#if EV_FORK_ENABLE
		2411	void
		2412	ev_fork_start (EV_P_ ev_fork *w)
		2413	{
		2414	if (expect_false (ev_is_active (w)))
		2415	return;
		2416
		2417	ev_start (EV_A_ (W)w, ++forkcnt);
		2418	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2419	forks [forkcnt - 1] = w;
		2420	}
		2421
		2422	void
		2423	ev_fork_stop (EV_P_ ev_fork *w)
		2424	{
		2425	clear_pending (EV_A_ (W)w);
		2426	if (expect_false (!ev_is_active (w)))
		2427	return;
		2428
		2429	{
		2430	int active = ((W)w)->active;
		2431	forks [active - 1] = forks [--forkcnt];
		2432	((W)forks [active - 1])->active = active;
		2433	}
		2434
		2435	ev_stop (EV_A_ (W)w);
		2436	}
		2437	#endif
		2438
		2439	#if EV_ASYNC_ENABLE
		2440	void
		2441	ev_async_start (EV_P_ ev_async *w)
		2442	{
		2443	if (expect_false (ev_is_active (w)))
		2444	return;
		2445
		2446	evpipe_init (EV_A);
		2447
		2448	ev_start (EV_A_ (W)w, ++asynccnt);
		2449	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2450	asyncs [asynccnt - 1] = w;
		2451	}
		2452
		2453	void
		2454	ev_async_stop (EV_P_ ev_async *w)
		2455	{
		2456	clear_pending (EV_A_ (W)w);
		2457	if (expect_false (!ev_is_active (w)))
		2458	return;
		2459
		2460	{
		2461	int active = ((W)w)->active;
		2462	asyncs [active - 1] = asyncs [--asynccnt];
		2463	((W)asyncs [active - 1])->active = active;
		2464	}
		2465
		2466	ev_stop (EV_A_ (W)w);
		2467	}
		2468
		2469	void
		2470	ev_async_send (EV_P_ ev_async *w)
		2471	{
		2472	w->sent = 1;
		2473	evpipe_write (EV_A_ 0, 1);
		2474	}
		2475	#endif
526		2476
527	/*****************************************************************************/	2477	/*****************************************************************************/
528	#if 1	2478
		2479	struct ev_once
		2480	{
		2481	ev_io io;
		2482	ev_timer to;
		2483	void (*cb)(int revents, void *arg);
		2484	void *arg;
		2485	};
529		2486
530	static void	2487	static void
531	sin_cb (struct ev_io *w, int revents)	2488	once_cb (EV_P_ struct ev_once *once, int revents)
532	{	2489	{
533	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2490	void (*cb)(int revents, void *arg) = once->cb;
		2491	void *arg = once->arg;
		2492
		2493	ev_io_stop (EV_A_ &once->io);
		2494	ev_timer_stop (EV_A_ &once->to);
		2495	ev_free (once);
		2496
		2497	cb (revents, arg);
534	}	2498	}
535		2499
536	static void	2500	static void
		2501	once_cb_io (EV_P_ ev_io *w, int revents)
		2502	{
		2503	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2504	}
		2505
		2506	static void
537	ocb (struct ev_timer *w, int revents)	2507	once_cb_to (EV_P_ ev_timer *w, int revents)
538	{	2508	{
539	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2509	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
540	evtimer_stop (w);
541	evtimer_start (w);
542	}	2510	}
543		2511
544	int main (void)	2512	void
		2513	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
545	{	2514	{
546	struct ev_io sin;	2515	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
547		2516
548	ev_init (0);	2517	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	}	2518	{
567	#endif	2519	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;	2520	return;
577	}	2521	}
578		2522
579	#endif	2523	once->cb = cb;
		2524	once->arg = arg;
580		2525
		2526	ev_init (&once->io, once_cb_io);
		2527	if (fd >= 0)
		2528	{
		2529	ev_io_set (&once->io, fd, events);
		2530	ev_io_start (EV_A_ &once->io);
		2531	}
581		2532
		2533	ev_init (&once->to, once_cb_to);
		2534	if (timeout >= 0.)
		2535	{
		2536	ev_timer_set (&once->to, timeout, 0.);
		2537	ev_timer_start (EV_A_ &once->to);
		2538	}
		2539	}
582		2540
		2541	#if EV_MULTIPLICITY
		2542	#include "ev_wrap.h"
		2543	#endif
583		2544
		2545	#ifdef __cplusplus
		2546	}
		2547	#endif
		2548

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