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Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.224 by root, Wed Apr 9 22:07:50 2008 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are met:
		9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
		45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
		49	# include "config.h"
		50	# endif
		51
		52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
		54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
		57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
		74	# endif
		75
		76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
		82	# endif
		83
		84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
		86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
		90	# endif
		91
		92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
		98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
		132	#endif
		133
1	#include <math.h>	134	#include <math.h>
2	#include <stdlib.h>	135	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	136	#include <fcntl.h>
5	#include <signal.h>	137	#include <stddef.h>
6		138
7	#include <stdio.h>	139	#include <stdio.h>
8		140
9	#include <assert.h>	141	#include <assert.h>
10	#include <errno.h>	142	#include <errno.h>
11	#include <sys/time.h>	143	#include <sys/types.h>
12	#include <time.h>	144	#include <time.h>
13		145
		146	#include <signal.h>
		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
		154	#ifndef _WIN32
		155	# include <sys/time.h>
		156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
		163	# endif
		164	#endif
		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
		167
		168	#ifndef EV_USE_MONOTONIC
		169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
		178	#endif
		179
		180	#ifndef EV_USE_SELECT
		181	# define EV_USE_SELECT 1
		182	#endif
		183
		184	#ifndef EV_USE_POLL
		185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
		190	#endif
		191
		192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
		196	# define EV_USE_EPOLL 0
		197	# endif
		198	#endif
		199
		200	#ifndef EV_USE_KQUEUE
		201	# define EV_USE_KQUEUE 0
		202	#endif
		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
		208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
		213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		241
14	#ifdef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
		243	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	244	# define EV_USE_MONOTONIC 0
		245	#endif
		246
		247	#ifndef CLOCK_REALTIME
		248	# undef EV_USE_REALTIME
		249	# define EV_USE_REALTIME 0
		250	#endif
		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
16	#endif	260	# endif
		261	#endif
17		262
18	#define HAVE_REALTIME 1	263	#if EV_USE_INOTIFY
19	#define HAVE_EPOLL 1	264	# include <sys/inotify.h>
20	#define HAVE_SELECT 1	265	#endif
		266
		267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
		283	/**/
		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
21		294
22	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23	#define MAX_BLOCKTIME 60.	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
24		298
		299	#if __GNUC__ >= 4
		300	# define expect(expr,value) __builtin_expect ((expr),(value))
		301	# define noinline __attribute__ ((noinline))
		302	#else
		303	# define expect(expr,value) (expr)
		304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
		308	#endif
		309
		310	#define expect_false(expr) expect ((expr) != 0, 0)
		311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
		319
		320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
		326	typedef ev_watcher *W;
		327	typedef ev_watcher_list *WL;
		328	typedef ev_watcher_time *WT;
		329
		330	#if EV_USE_MONOTONIC
		331	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		332	/* giving it a reasonably high chance of working on typical architetcures */
		333	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		334	#endif
		335
		336	#ifdef _WIN32
		337	# include "ev_win32.c"
		338	#endif
		339
		340	/*****************************************************************************/
		341
		342	static void (*syserr_cb)(const char *msg);
		343
		344	void
		345	ev_set_syserr_cb (void (*cb)(const char *msg))
		346	{
		347	syserr_cb = cb;
		348	}
		349
		350	static void noinline
		351	syserr (const char *msg)
		352	{
		353	if (!msg)
		354	msg = "(libev) system error";
		355
		356	if (syserr_cb)
		357	syserr_cb (msg);
		358	else
		359	{
		360	perror (msg);
		361	abort ();
		362	}
		363	}
		364
		365	static void *
		366	ev_realloc_emul (void *ptr, long size)
		367	{
		368	/* some systems, notably openbsd and darwin, fail to properly
		369	* implement realloc (x, 0) (as required by both ansi c-98 and
		370	* the single unix specification, so work around them here.
		371	*/
		372
		373	if (size)
		374	return realloc (ptr, size);
		375
		376	free (ptr);
		377	return 0;
		378	}
		379
		380	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		381
		382	void
		383	ev_set_allocator (void *(*cb)(void *ptr, long size))
		384	{
		385	alloc = cb;
		386	}
		387
		388	inline_speed void *
		389	ev_realloc (void *ptr, long size)
		390	{
		391	ptr = alloc (ptr, size);
		392
		393	if (!ptr && size)
		394	{
		395	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		396	abort ();
		397	}
		398
		399	return ptr;
		400	}
		401
		402	#define ev_malloc(size) ev_realloc (0, (size))
		403	#define ev_free(ptr) ev_realloc ((ptr), 0)
		404
		405	/*****************************************************************************/
		406
		407	typedef struct
		408	{
		409	WL head;
		410	unsigned char events;
		411	unsigned char reify;
		412	#if EV_SELECT_IS_WINSOCKET
		413	SOCKET handle;
		414	#endif
		415	} ANFD;
		416
		417	typedef struct
		418	{
		419	W w;
		420	int events;
		421	} ANPENDING;
		422
		423	#if EV_USE_INOTIFY
		424	typedef struct
		425	{
		426	WL head;
		427	} ANFS;
		428	#endif
		429
		430	#if EV_MULTIPLICITY
		431
		432	struct ev_loop
		433	{
		434	ev_tstamp ev_rt_now;
		435	#define ev_rt_now ((loop)->ev_rt_now)
		436	#define VAR(name,decl) decl;
		437	#include "ev_vars.h"
		438	#undef VAR
		439	};
25	#include "ev.h"	440	#include "ev_wrap.h"
26		441
27	struct ev_watcher {	442	static struct ev_loop default_loop_struct;
28	EV_WATCHER (ev_watcher);	443	struct ev_loop *ev_default_loop_ptr;
29	};
30		444
31	struct ev_watcher_list {	445	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		446
35	static ev_tstamp now, diff; /* monotonic clock */
36	ev_tstamp ev_now;	447	ev_tstamp ev_rt_now;
37	int ev_method;	448	#define VAR(name,decl) static decl;
		449	#include "ev_vars.h"
		450	#undef VAR
38		451
39	static int have_monotonic; /* runtime */	452	static int ev_default_loop_ptr;
40		453
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	454	#endif
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		455
45	/*****************************************************************************/	456	/*****************************************************************************/
46		457
47	ev_tstamp	458	ev_tstamp
48	ev_time (void)	459	ev_time (void)
49	{	460	{
50	#if HAVE_REALTIME	461	#if EV_USE_REALTIME
51	struct timespec ts;	462	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	463	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	464	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	465	#else
55	struct timeval tv;	466	struct timeval tv;
56	gettimeofday (&tv, 0);	467	gettimeofday (&tv, 0);
57	return tv.tv_sec + tv.tv_usec * 1e-6;	468	return tv.tv_sec + tv.tv_usec * 1e-6;
58	#endif	469	#endif
59	}	470	}
60		471
61	static ev_tstamp	472	ev_tstamp inline_size
62	get_clock (void)	473	get_clock (void)
63	{	474	{
64	#if HAVE_MONOTONIC	475	#if EV_USE_MONOTONIC
65	if (have_monotonic)	476	if (expect_true (have_monotonic))
66	{	477	{
67	struct timespec ts;	478	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	479	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	480	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	481	}
71	#endif	482	#endif
72		483
73	return ev_time ();	484	return ev_time ();
74	}	485	}
75		486
76	#define array_needsize(base,cur,cnt,init) \	487	#if EV_MULTIPLICITY
77	if ((cnt) > cur) \	488	ev_tstamp
78	{ \	489	ev_now (EV_P)
79	int newcnt = cur ? cur << 1 : 16; \	490	{
80	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	491	return ev_rt_now;
81	base = realloc (base, sizeof (*base) * (newcnt)); \	492	}
82	init (base + cur, newcnt - cur); \	493	#endif
83	cur = newcnt; \	494
		495	void
		496	ev_sleep (ev_tstamp delay)
		497	{
		498	if (delay > 0.)
84	}	499	{
		500	#if EV_USE_NANOSLEEP
		501	struct timespec ts;
		502
		503	ts.tv_sec = (time_t)delay;
		504	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		505
		506	nanosleep (&ts, 0);
		507	#elif defined(_WIN32)
		508	Sleep ((unsigned long)(delay * 1e3));
		509	#else
		510	struct timeval tv;
		511
		512	tv.tv_sec = (time_t)delay;
		513	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		514
		515	select (0, 0, 0, 0, &tv);
		516	#endif
		517	}
		518	}
85		519
86	/*****************************************************************************/	520	/*****************************************************************************/
87		521
		522	int inline_size
		523	array_nextsize (int elem, int cur, int cnt)
		524	{
		525	int ncur = cur + 1;
		526
		527	do
		528	ncur <<= 1;
		529	while (cnt > ncur);
		530
		531	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		532	if (elem * ncur > 4096)
		533	{
		534	ncur *= elem;
		535	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		536	ncur = ncur - sizeof (void *) * 4;
		537	ncur /= elem;
		538	}
		539
		540	return ncur;
		541	}
		542
		543	static noinline void *
		544	array_realloc (int elem, void *base, int *cur, int cnt)
		545	{
		546	*cur = array_nextsize (elem, *cur, cnt);
		547	return ev_realloc (base, elem * *cur);
		548	}
		549
		550	#define array_needsize(type,base,cur,cnt,init) \
		551	if (expect_false ((cnt) > (cur))) \
		552	{ \
		553	int ocur_ = (cur); \
		554	(base) = (type *)array_realloc \
		555	(sizeof (type), (base), &(cur), (cnt)); \
		556	init ((base) + (ocur_), (cur) - ocur_); \
		557	}
		558
		559	#if 0
		560	#define array_slim(type,stem) \
		561	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		562	{ \
		563	stem ## max = array_roundsize (stem ## cnt >> 1); \
		564	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		565	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		566	}
		567	#endif
		568
		569	#define array_free(stem, idx) \
		570	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		571
		572	/*****************************************************************************/
		573
		574	void noinline
		575	ev_feed_event (EV_P_ void *w, int revents)
		576	{
		577	W w_ = (W)w;
		578	int pri = ABSPRI (w_);
		579
		580	if (expect_false (w_->pending))
		581	pendings [pri][w_->pending - 1].events |= revents;
		582	else
		583	{
		584	w_->pending = ++pendingcnt [pri];
		585	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		586	pendings [pri][w_->pending - 1].w = w_;
		587	pendings [pri][w_->pending - 1].events = revents;
		588	}
		589	}
		590
		591	void inline_speed
		592	queue_events (EV_P_ W *events, int eventcnt, int type)
		593	{
		594	int i;
		595
		596	for (i = 0; i < eventcnt; ++i)
		597	ev_feed_event (EV_A_ events [i], type);
		598	}
		599
		600	/*****************************************************************************/
		601
		602	void inline_size
		603	anfds_init (ANFD *base, int count)
		604	{
		605	while (count--)
		606	{
		607	base->head = 0;
		608	base->events = EV_NONE;
		609	base->reify = 0;
		610
		611	++base;
		612	}
		613	}
		614
		615	void inline_speed
		616	fd_event (EV_P_ int fd, int revents)
		617	{
		618	ANFD *anfd = anfds + fd;
		619	ev_io *w;
		620
		621	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		622	{
		623	int ev = w->events & revents;
		624
		625	if (ev)
		626	ev_feed_event (EV_A_ (W)w, ev);
		627	}
		628	}
		629
		630	void
		631	ev_feed_fd_event (EV_P_ int fd, int revents)
		632	{
		633	if (fd >= 0 && fd < anfdmax)
		634	fd_event (EV_A_ fd, revents);
		635	}
		636
		637	void inline_size
		638	fd_reify (EV_P)
		639	{
		640	int i;
		641
		642	for (i = 0; i < fdchangecnt; ++i)
		643	{
		644	int fd = fdchanges [i];
		645	ANFD *anfd = anfds + fd;
		646	ev_io *w;
		647
		648	unsigned char events = 0;
		649
		650	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		651	events |= (unsigned char)w->events;
		652
		653	#if EV_SELECT_IS_WINSOCKET
		654	if (events)
		655	{
		656	unsigned long argp;
		657	#ifdef EV_FD_TO_WIN32_HANDLE
		658	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		659	#else
		660	anfd->handle = _get_osfhandle (fd);
		661	#endif
		662	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		663	}
		664	#endif
		665
		666	{
		667	unsigned char o_events = anfd->events;
		668	unsigned char o_reify = anfd->reify;
		669
		670	anfd->reify = 0;
		671	anfd->events = events;
		672
		673	if (o_events != events || o_reify & EV_IOFDSET)
		674	backend_modify (EV_A_ fd, o_events, events);
		675	}
		676	}
		677
		678	fdchangecnt = 0;
		679	}
		680
		681	void inline_size
		682	fd_change (EV_P_ int fd, int flags)
		683	{
		684	unsigned char reify = anfds [fd].reify;
		685	anfds [fd].reify |= flags;
		686
		687	if (expect_true (!reify))
		688	{
		689	++fdchangecnt;
		690	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		691	fdchanges [fdchangecnt - 1] = fd;
		692	}
		693	}
		694
		695	void inline_speed
		696	fd_kill (EV_P_ int fd)
		697	{
		698	ev_io *w;
		699
		700	while ((w = (ev_io *)anfds [fd].head))
		701	{
		702	ev_io_stop (EV_A_ w);
		703	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		704	}
		705	}
		706
		707	int inline_size
		708	fd_valid (int fd)
		709	{
		710	#ifdef _WIN32
		711	return _get_osfhandle (fd) != -1;
		712	#else
		713	return fcntl (fd, F_GETFD) != -1;
		714	#endif
		715	}
		716
		717	/* called on EBADF to verify fds */
		718	static void noinline
		719	fd_ebadf (EV_P)
		720	{
		721	int fd;
		722
		723	for (fd = 0; fd < anfdmax; ++fd)
		724	if (anfds [fd].events)
		725	if (!fd_valid (fd) == -1 && errno == EBADF)
		726	fd_kill (EV_A_ fd);
		727	}
		728
		729	/* called on ENOMEM in select/poll to kill some fds and retry */
		730	static void noinline
		731	fd_enomem (EV_P)
		732	{
		733	int fd;
		734
		735	for (fd = anfdmax; fd--; )
		736	if (anfds [fd].events)
		737	{
		738	fd_kill (EV_A_ fd);
		739	return;
		740	}
		741	}
		742
		743	/* usually called after fork if backend needs to re-arm all fds from scratch */
		744	static void noinline
		745	fd_rearm_all (EV_P)
		746	{
		747	int fd;
		748
		749	for (fd = 0; fd < anfdmax; ++fd)
		750	if (anfds [fd].events)
		751	{
		752	anfds [fd].events = 0;
		753	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		754	}
		755	}
		756
		757	/*****************************************************************************/
		758
		759	void inline_speed
		760	upheap (WT *heap, int k)
		761	{
		762	WT w = heap [k];
		763
		764	while (k)
		765	{
		766	int p = (k - 1) >> 1;
		767
		768	if (heap [p]->at <= w->at)
		769	break;
		770
		771	heap [k] = heap [p];
		772	((W)heap [k])->active = k + 1;
		773	k = p;
		774	}
		775
		776	heap [k] = w;
		777	((W)heap [k])->active = k + 1;
		778	}
		779
		780	void inline_speed
		781	downheap (WT *heap, int N, int k)
		782	{
		783	WT w = heap [k];
		784
		785	for (;;)
		786	{
		787	int c = (k << 1) + 1;
		788
		789	if (c >= N)
		790	break;
		791
		792	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		793	? 1 : 0;
		794
		795	if (w->at <= heap [c]->at)
		796	break;
		797
		798	heap [k] = heap [c];
		799	((W)heap [k])->active = k + 1;
		800
		801	k = c;
		802	}
		803
		804	heap [k] = w;
		805	((W)heap [k])->active = k + 1;
		806	}
		807
		808	void inline_size
		809	adjustheap (WT *heap, int N, int k)
		810	{
		811	upheap (heap, k);
		812	downheap (heap, N, k);
		813	}
		814
		815	/*****************************************************************************/
		816
88	typedef struct	817	typedef struct
89	{	818	{
90	struct ev_io *head;	819	WL head;
91	unsigned char wev, rev; /* want, received event set */	820	EV_ATOMIC_T gotsig;
92	} ANFD;
93
94	static ANFD *anfds;
95	static int anfdmax;
96
97	static int *fdchanges;
98	static int fdchangemax, fdchangecnt;
99
100	static void
101	anfds_init (ANFD *base, int count)
102	{
103	while (count--)
104	{
105	base->head = 0;
106	base->wev = base->rev = EV_NONE;
107	++base;
108	}
109	}
110
111	typedef struct
112	{
113	struct ev_watcher *w;
114	int events;
115	} ANPENDING;
116
117	static ANPENDING *pendings;
118	static int pendingmax, pendingcnt;
119
120	static void
121	event (struct ev_watcher *w, int events)
122	{
123	w->pending = ++pendingcnt;
124	array_needsize (pendings, pendingmax, pendingcnt, );
125	pendings [pendingcnt - 1].w = w;
126	pendings [pendingcnt - 1].events = events;
127	}
128
129	static void
130	fd_event (int fd, int events)
131	{
132	ANFD *anfd = anfds + fd;
133	struct ev_io *w;
134
135	for (w = anfd->head; w; w = w->next)
136	{
137	int ev = w->events & events;
138
139	if (ev)
140	event ((struct ev_watcher *)w, ev);
141	}
142	}
143
144	/*****************************************************************************/
145
146	static struct ev_timer **atimers;
147	static int atimermax, atimercnt;
148
149	static struct ev_timer **rtimers;
150	static int rtimermax, rtimercnt;
151
152	static void
153	upheap (struct ev_timer **timers, int k)
154	{
155	struct ev_timer *w = timers [k];
156
157	while (k && timers [k >> 1]->at > w->at)
158	{
159	timers [k] = timers [k >> 1];
160	timers [k]->active = k + 1;
161	k >>= 1;
162	}
163
164	timers [k] = w;
165	timers [k]->active = k + 1;
166
167	}
168
169	static void
170	downheap (struct ev_timer **timers, int N, int k)
171	{
172	struct ev_timer *w = timers [k];
173
174	while (k < (N >> 1))
175	{
176	int j = k << 1;
177
178	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
179	++j;
180
181	if (w->at <= timers [j]->at)
182	break;
183
184	timers [k] = timers [j];
185	timers [k]->active = k + 1;
186	k = j;
187	}
188
189	timers [k] = w;
190	timers [k]->active = k + 1;
191	}
192
193	/*****************************************************************************/
194
195	typedef struct
196	{
197	struct ev_signal *head;
198	sig_atomic_t gotsig;
199	} ANSIG;	821	} ANSIG;
200		822
201	static ANSIG *signals;	823	static ANSIG *signals;
202	static int signalmax;	824	static int signalmax;
203		825
204	static int sigpipe [2];	826	static EV_ATOMIC_T gotsig;
205	static sig_atomic_t gotsig;
206	static struct ev_io sigev;
207		827
208	static void	828	void inline_size
209	signals_init (ANSIG *base, int count)	829	signals_init (ANSIG *base, int count)
210	{	830	{
211	while (count--)	831	while (count--)
212	{	832	{
213	base->head = 0;	833	base->head = 0;
214	base->gotsig = 0;	834	base->gotsig = 0;
		835
215	++base;	836	++base;
216	}	837	}
217	}	838	}
218		839
		840	/*****************************************************************************/
		841
		842	void inline_speed
		843	fd_intern (int fd)
		844	{
		845	#ifdef _WIN32
		846	int arg = 1;
		847	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		848	#else
		849	fcntl (fd, F_SETFD, FD_CLOEXEC);
		850	fcntl (fd, F_SETFL, O_NONBLOCK);
		851	#endif
		852	}
		853
		854	static void noinline
		855	evpipe_init (EV_P)
		856	{
		857	if (!ev_is_active (&pipeev))
		858	{
		859	#if EV_USE_EVENTFD
		860	if ((evfd = eventfd (0, 0)) >= 0)
		861	{
		862	evpipe [0] = -1;
		863	fd_intern (evfd);
		864	ev_io_set (&pipeev, evfd, EV_READ);
		865	}
		866	else
		867	#endif
		868	{
		869	while (pipe (evpipe))
		870	syserr ("(libev) error creating signal/async pipe");
		871
		872	fd_intern (evpipe [0]);
		873	fd_intern (evpipe [1]);
		874	ev_io_set (&pipeev, evpipe [0], EV_READ);
		875	}
		876
		877	ev_io_start (EV_A_ &pipeev);
		878	ev_unref (EV_A); /* watcher should not keep loop alive */
		879	}
		880	}
		881
		882	void inline_size
		883	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		884	{
		885	if (!*flag)
		886	{
		887	int old_errno = errno; /* save errno because write might clobber it */
		888
		889	*flag = 1;
		890
		891	#if EV_USE_EVENTFD
		892	if (evfd >= 0)
		893	{
		894	uint64_t counter = 1;
		895	write (evfd, &counter, sizeof (uint64_t));
		896	}
		897	else
		898	#endif
		899	write (evpipe [1], &old_errno, 1);
		900
		901	errno = old_errno;
		902	}
		903	}
		904
219	static void	905	static void
		906	pipecb (EV_P_ ev_io *iow, int revents)
		907	{
		908	#if EV_USE_EVENTFD
		909	if (evfd >= 0)
		910	{
		911	uint64_t counter = 1;
		912	read (evfd, &counter, sizeof (uint64_t));
		913	}
		914	else
		915	#endif
		916	{
		917	char dummy;
		918	read (evpipe [0], &dummy, 1);
		919	}
		920
		921	if (gotsig && ev_is_default_loop (EV_A))
		922	{
		923	int signum;
		924	gotsig = 0;
		925
		926	for (signum = signalmax; signum--; )
		927	if (signals [signum].gotsig)
		928	ev_feed_signal_event (EV_A_ signum + 1);
		929	}
		930
		931	#if EV_ASYNC_ENABLE
		932	if (gotasync)
		933	{
		934	int i;
		935	gotasync = 0;
		936
		937	for (i = asynccnt; i--; )
		938	if (asyncs [i]->sent)
		939	{
		940	asyncs [i]->sent = 0;
		941	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		942	}
		943	}
		944	#endif
		945	}
		946
		947	/*****************************************************************************/
		948
		949	static void
220	sighandler (int signum)	950	ev_sighandler (int signum)
221	{	951	{
		952	#if EV_MULTIPLICITY
		953	struct ev_loop *loop = &default_loop_struct;
		954	#endif
		955
		956	#if _WIN32
		957	signal (signum, ev_sighandler);
		958	#endif
		959
222	signals [signum - 1].gotsig = 1;	960	signals [signum - 1].gotsig = 1;
		961	evpipe_write (EV_A_ &gotsig);
		962	}
223		963
224	if (!gotsig)	964	void noinline
		965	ev_feed_signal_event (EV_P_ int signum)
		966	{
		967	WL w;
		968
		969	#if EV_MULTIPLICITY
		970	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		971	#endif
		972
		973	--signum;
		974
		975	if (signum < 0 || signum >= signalmax)
		976	return;
		977
		978	signals [signum].gotsig = 0;
		979
		980	for (w = signals [signum].head; w; w = w->next)
		981	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		982	}
		983
		984	/*****************************************************************************/
		985
		986	static WL childs [EV_PID_HASHSIZE];
		987
		988	#ifndef _WIN32
		989
		990	static ev_signal childev;
		991
		992	#ifndef WIFCONTINUED
		993	# define WIFCONTINUED(status) 0
		994	#endif
		995
		996	void inline_speed
		997	child_reap (EV_P_ int chain, int pid, int status)
		998	{
		999	ev_child *w;
		1000	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1001
		1002	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1003	{
		1004	if ((w->pid == pid || !w->pid)
		1005	&& (!traced || (w->flags & 1)))
		1006	{
		1007	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1008	w->rpid = pid;
		1009	w->rstatus = status;
		1010	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1011	}
		1012	}
		1013	}
		1014
		1015	#ifndef WCONTINUED
		1016	# define WCONTINUED 0
		1017	#endif
		1018
		1019	static void
		1020	childcb (EV_P_ ev_signal *sw, int revents)
		1021	{
		1022	int pid, status;
		1023
		1024	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1025	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		1026	if (!WCONTINUED
		1027	|| errno != EINVAL
		1028	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1029	return;
		1030
		1031	/* make sure we are called again until all children have been reaped */
		1032	/* we need to do it this way so that the callback gets called before we continue */
		1033	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1034
		1035	child_reap (EV_A_ pid, pid, status);
		1036	if (EV_PID_HASHSIZE > 1)
		1037	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1038	}
		1039
		1040	#endif
		1041
		1042	/*****************************************************************************/
		1043
		1044	#if EV_USE_PORT
		1045	# include "ev_port.c"
		1046	#endif
		1047	#if EV_USE_KQUEUE
		1048	# include "ev_kqueue.c"
		1049	#endif
		1050	#if EV_USE_EPOLL
		1051	# include "ev_epoll.c"
		1052	#endif
		1053	#if EV_USE_POLL
		1054	# include "ev_poll.c"
		1055	#endif
		1056	#if EV_USE_SELECT
		1057	# include "ev_select.c"
		1058	#endif
		1059
		1060	int
		1061	ev_version_major (void)
		1062	{
		1063	return EV_VERSION_MAJOR;
		1064	}
		1065
		1066	int
		1067	ev_version_minor (void)
		1068	{
		1069	return EV_VERSION_MINOR;
		1070	}
		1071
		1072	/* return true if we are running with elevated privileges and should ignore env variables */
		1073	int inline_size
		1074	enable_secure (void)
		1075	{
		1076	#ifdef _WIN32
		1077	return 0;
		1078	#else
		1079	return getuid () != geteuid ()
		1080	|| getgid () != getegid ();
		1081	#endif
		1082	}
		1083
		1084	unsigned int
		1085	ev_supported_backends (void)
		1086	{
		1087	unsigned int flags = 0;
		1088
		1089	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1090	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1091	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1092	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1093	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1094
		1095	return flags;
		1096	}
		1097
		1098	unsigned int
		1099	ev_recommended_backends (void)
		1100	{
		1101	unsigned int flags = ev_supported_backends ();
		1102
		1103	#ifndef __NetBSD__
		1104	/* kqueue is borked on everything but netbsd apparently */
		1105	/* it usually doesn't work correctly on anything but sockets and pipes */
		1106	flags &= ~EVBACKEND_KQUEUE;
		1107	#endif
		1108	#ifdef __APPLE__
		1109	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1110	flags &= ~EVBACKEND_POLL;
		1111	#endif
		1112
		1113	return flags;
		1114	}
		1115
		1116	unsigned int
		1117	ev_embeddable_backends (void)
		1118	{
		1119	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1120
		1121	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1122	/* please fix it and tell me how to detect the fix */
		1123	flags &= ~EVBACKEND_EPOLL;
		1124
		1125	return flags;
		1126	}
		1127
		1128	unsigned int
		1129	ev_backend (EV_P)
		1130	{
		1131	return backend;
		1132	}
		1133
		1134	unsigned int
		1135	ev_loop_count (EV_P)
		1136	{
		1137	return loop_count;
		1138	}
		1139
		1140	void
		1141	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1142	{
		1143	io_blocktime = interval;
		1144	}
		1145
		1146	void
		1147	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1148	{
		1149	timeout_blocktime = interval;
		1150	}
		1151
		1152	static void noinline
		1153	loop_init (EV_P_ unsigned int flags)
		1154	{
		1155	if (!backend)
		1156	{
		1157	#if EV_USE_MONOTONIC
225	{	1158	{
		1159	struct timespec ts;
		1160	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1161	have_monotonic = 1;
		1162	}
		1163	#endif
		1164
		1165	ev_rt_now = ev_time ();
		1166	mn_now = get_clock ();
		1167	now_floor = mn_now;
		1168	rtmn_diff = ev_rt_now - mn_now;
		1169
		1170	io_blocktime = 0.;
		1171	timeout_blocktime = 0.;
		1172	backend = 0;
		1173	backend_fd = -1;
		1174	gotasync = 0;
		1175	#if EV_USE_INOTIFY
		1176	fs_fd = -2;
		1177	#endif
		1178
		1179	/* pid check not overridable via env */
		1180	#ifndef _WIN32
		1181	if (flags & EVFLAG_FORKCHECK)
		1182	curpid = getpid ();
		1183	#endif
		1184
		1185	if (!(flags & EVFLAG_NOENV)
		1186	&& !enable_secure ()
		1187	&& getenv ("LIBEV_FLAGS"))
		1188	flags = atoi (getenv ("LIBEV_FLAGS"));
		1189
		1190	if (!(flags & 0x0000ffffUL))
		1191	flags |= ev_recommended_backends ();
		1192
		1193	#if EV_USE_PORT
		1194	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1195	#endif
		1196	#if EV_USE_KQUEUE
		1197	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1198	#endif
		1199	#if EV_USE_EPOLL
		1200	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1201	#endif
		1202	#if EV_USE_POLL
		1203	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1204	#endif
		1205	#if EV_USE_SELECT
		1206	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1207	#endif
		1208
		1209	ev_init (&pipeev, pipecb);
		1210	ev_set_priority (&pipeev, EV_MAXPRI);
		1211	}
		1212	}
		1213
		1214	static void noinline
		1215	loop_destroy (EV_P)
		1216	{
		1217	int i;
		1218
		1219	if (ev_is_active (&pipeev))
		1220	{
		1221	ev_ref (EV_A); /* signal watcher */
		1222	ev_io_stop (EV_A_ &pipeev);
		1223
		1224	#if EV_USE_EVENTFD
		1225	if (evfd >= 0)
		1226	close (evfd);
		1227	#endif
		1228
		1229	if (evpipe [0] >= 0)
		1230	{
		1231	close (evpipe [0]);
		1232	close (evpipe [1]);
		1233	}
		1234	}
		1235
		1236	#if EV_USE_INOTIFY
		1237	if (fs_fd >= 0)
		1238	close (fs_fd);
		1239	#endif
		1240
		1241	if (backend_fd >= 0)
		1242	close (backend_fd);
		1243
		1244	#if EV_USE_PORT
		1245	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1246	#endif
		1247	#if EV_USE_KQUEUE
		1248	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1249	#endif
		1250	#if EV_USE_EPOLL
		1251	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1252	#endif
		1253	#if EV_USE_POLL
		1254	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1255	#endif
		1256	#if EV_USE_SELECT
		1257	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1258	#endif
		1259
		1260	for (i = NUMPRI; i--; )
		1261	{
		1262	array_free (pending, [i]);
		1263	#if EV_IDLE_ENABLE
		1264	array_free (idle, [i]);
		1265	#endif
		1266	}
		1267
		1268	ev_free (anfds); anfdmax = 0;
		1269
		1270	/* have to use the microsoft-never-gets-it-right macro */
		1271	array_free (fdchange, EMPTY);
		1272	array_free (timer, EMPTY);
		1273	#if EV_PERIODIC_ENABLE
		1274	array_free (periodic, EMPTY);
		1275	#endif
		1276	#if EV_FORK_ENABLE
		1277	array_free (fork, EMPTY);
		1278	#endif
		1279	array_free (prepare, EMPTY);
		1280	array_free (check, EMPTY);
		1281	#if EV_ASYNC_ENABLE
		1282	array_free (async, EMPTY);
		1283	#endif
		1284
		1285	backend = 0;
		1286	}
		1287
		1288	void inline_size infy_fork (EV_P);
		1289
		1290	void inline_size
		1291	loop_fork (EV_P)
		1292	{
		1293	#if EV_USE_PORT
		1294	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1295	#endif
		1296	#if EV_USE_KQUEUE
		1297	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1298	#endif
		1299	#if EV_USE_EPOLL
		1300	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1301	#endif
		1302	#if EV_USE_INOTIFY
		1303	infy_fork (EV_A);
		1304	#endif
		1305
		1306	if (ev_is_active (&pipeev))
		1307	{
		1308	/* this "locks" the handlers against writing to the pipe */
		1309	/* while we modify the fd vars */
226	gotsig = 1;	1310	gotsig = 1;
227	write (sigpipe [1], &gotsig, 1);	1311	#if EV_ASYNC_ENABLE
		1312	gotasync = 1;
		1313	#endif
		1314
		1315	ev_ref (EV_A);
		1316	ev_io_stop (EV_A_ &pipeev);
		1317
		1318	#if EV_USE_EVENTFD
		1319	if (evfd >= 0)
		1320	close (evfd);
		1321	#endif
		1322
		1323	if (evpipe [0] >= 0)
		1324	{
		1325	close (evpipe [0]);
		1326	close (evpipe [1]);
		1327	}
		1328
		1329	evpipe_init (EV_A);
		1330	/* now iterate over everything, in case we missed something */
		1331	pipecb (EV_A_ &pipeev, EV_READ);
		1332	}
		1333
		1334	postfork = 0;
		1335	}
		1336
		1337	#if EV_MULTIPLICITY
		1338	struct ev_loop *
		1339	ev_loop_new (unsigned int flags)
		1340	{
		1341	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1342
		1343	memset (loop, 0, sizeof (struct ev_loop));
		1344
		1345	loop_init (EV_A_ flags);
		1346
		1347	if (ev_backend (EV_A))
		1348	return loop;
		1349
		1350	return 0;
		1351	}
		1352
		1353	void
		1354	ev_loop_destroy (EV_P)
		1355	{
		1356	loop_destroy (EV_A);
		1357	ev_free (loop);
		1358	}
		1359
		1360	void
		1361	ev_loop_fork (EV_P)
		1362	{
		1363	postfork = 1; /* must be in line with ev_default_fork */
		1364	}
		1365
		1366	#endif
		1367
		1368	#if EV_MULTIPLICITY
		1369	struct ev_loop *
		1370	ev_default_loop_init (unsigned int flags)
		1371	#else
		1372	int
		1373	ev_default_loop (unsigned int flags)
		1374	#endif
		1375	{
		1376	if (!ev_default_loop_ptr)
228	}	1377	{
229	}	1378	#if EV_MULTIPLICITY
		1379	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1380	#else
		1381	ev_default_loop_ptr = 1;
		1382	#endif
230		1383
231	static void	1384	loop_init (EV_A_ flags);
232	sigcb (struct ev_io *iow, int revents)	1385
		1386	if (ev_backend (EV_A))
		1387	{
		1388	#ifndef _WIN32
		1389	ev_signal_init (&childev, childcb, SIGCHLD);
		1390	ev_set_priority (&childev, EV_MAXPRI);
		1391	ev_signal_start (EV_A_ &childev);
		1392	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1393	#endif
		1394	}
		1395	else
		1396	ev_default_loop_ptr = 0;
		1397	}
		1398
		1399	return ev_default_loop_ptr;
		1400	}
		1401
		1402	void
		1403	ev_default_destroy (void)
233	{	1404	{
234	struct ev_signal *w;	1405	#if EV_MULTIPLICITY
		1406	struct ev_loop *loop = ev_default_loop_ptr;
		1407	#endif
		1408
		1409	#ifndef _WIN32
		1410	ev_ref (EV_A); /* child watcher */
		1411	ev_signal_stop (EV_A_ &childev);
		1412	#endif
		1413
		1414	loop_destroy (EV_A);
		1415	}
		1416
		1417	void
		1418	ev_default_fork (void)
		1419	{
		1420	#if EV_MULTIPLICITY
		1421	struct ev_loop *loop = ev_default_loop_ptr;
		1422	#endif
		1423
		1424	if (backend)
		1425	postfork = 1; /* must be in line with ev_loop_fork */
		1426	}
		1427
		1428	/*****************************************************************************/
		1429
		1430	void
		1431	ev_invoke (EV_P_ void *w, int revents)
		1432	{
		1433	EV_CB_INVOKE ((W)w, revents);
		1434	}
		1435
		1436	void inline_speed
		1437	call_pending (EV_P)
		1438	{
235	int sig;	1439	int pri;
236		1440
237	gotsig = 0;	1441	for (pri = NUMPRI; pri--; )
238	read (sigpipe [0], &revents, 1);	1442	while (pendingcnt [pri])
239
240	for (sig = signalmax; sig--; )
241	if (signals [sig].gotsig)
242	{	1443	{
243	signals [sig].gotsig = 0;	1444	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
244		1445
245	for (w = signals [sig].head; w; w = w->next)	1446	if (expect_true (p->w))
246	event ((struct ev_watcher *)w, EV_SIGNAL);	1447	{
		1448	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1449
		1450	p->w->pending = 0;
		1451	EV_CB_INVOKE (p->w, p->events);
		1452	}
247	}	1453	}
248	}	1454	}
249		1455
250	static void	1456	void inline_size
251	siginit (void)	1457	timers_reify (EV_P)
252	{	1458	{
253	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
254	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
255
256	/* rather than sort out wether we really need nb, set it */
257	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
258	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
259
260	evio_set (&sigev, sigpipe [0], EV_READ);
261	evio_start (&sigev);
262	}
263
264	/*****************************************************************************/
265
266	#if HAVE_EPOLL
267	# include "ev_epoll.c"
268	#endif
269	#if HAVE_SELECT
270	# include "ev_select.c"
271	#endif
272
273	int ev_init (int flags)
274	{
275	#if HAVE_MONOTONIC
276	{
277	struct timespec ts;
278	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
279	have_monotonic = 1;
280	}
281	#endif
282
283	ev_now = ev_time ();
284	now = get_clock ();
285	diff = ev_now - now;
286
287	if (pipe (sigpipe))
288	return 0;
289
290	ev_method = EVMETHOD_NONE;
291	#if HAVE_EPOLL
292	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
293	#endif
294	#if HAVE_SELECT
295	if (ev_method == EVMETHOD_NONE) select_init (flags);
296	#endif
297
298	if (ev_method)
299	{
300	evw_init (&sigev, sigcb, 0);
301	siginit ();
302	}
303
304	return ev_method;
305	}
306
307	/*****************************************************************************/
308
309	void ev_prefork (void)
310	{
311	}
312
313	void ev_postfork_parent (void)
314	{
315	}
316
317	void ev_postfork_child (void)
318	{
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_EPOLL)
321	epoll_postfork_child ();
322	#endif
323
324	evio_stop (&sigev);
325	close (sigpipe [0]);
326	close (sigpipe [1]);
327	pipe (sigpipe);
328	siginit ();
329	}
330
331	/*****************************************************************************/
332
333	static ev_hook hooks [EVHOOK_NUM];
334
335	void
336	ev_hook_register (int type, ev_hook hook)
337	{
338	hooks [type] = hook;
339	}
340
341	void
342	ev_hook_unregister (int type, ev_hook hook)
343	{
344	hooks [type] = 0;
345	}
346
347	static void
348	hook_call (int type)
349	{
350	if (hooks [type])
351	hooks [type] ();
352	}
353
354	static void
355	fd_reify (void)
356	{
357	int i;
358
359	for (i = 0; i < fdchangecnt; ++i)
360	{
361	int fd = fdchanges [i];
362	ANFD *anfd = anfds + fd;
363	struct ev_io *w;
364
365	int wev = 0;
366
367	for (w = anfd->head; w; w = w->next)
368	wev |= w->events;
369
370	if (anfd->wev != wev)
371	{
372	method_modify (fd, anfd->wev, wev);
373	anfd->wev = wev;
374	}
375	}
376
377	fdchangecnt = 0;
378	}
379
380	static void
381	call_pending ()
382	{
383	int i;
384
385	for (i = 0; i < pendingcnt; ++i)
386	{
387	ANPENDING *p = pendings + i;
388
389	if (p->w)
390	{
391	p->w->pending = 0;
392	p->w->cb (p->w, p->events);
393	}
394	}
395
396	pendingcnt = 0;
397	}
398
399	static void
400	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)
401	{
402	while (timercnt && timers [0]->at <= now)	1459	while (timercnt && ((WT)timers [0])->at <= mn_now)
403	{	1460	{
404	struct ev_timer *w = timers [0];	1461	ev_timer *w = (ev_timer *)timers [0];
		1462
		1463	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
405		1464
406	/* first reschedule or stop timer */	1465	/* first reschedule or stop timer */
407	if (w->repeat)	1466	if (w->repeat)
408	{	1467	{
409	if (w->is_abs)	1468	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
410	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1469
411	else
412	w->at = now + w->repeat;	1470	((WT)w)->at += w->repeat;
413		1471	if (((WT)w)->at < mn_now)
414	assert (w->at > now);	1472	((WT)w)->at = mn_now;
415		1473
416	downheap (timers, timercnt, 0);	1474	downheap (timers, timercnt, 0);
417	}	1475	}
418	else	1476	else
		1477	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1478
		1479	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1480	}
		1481	}
		1482
		1483	#if EV_PERIODIC_ENABLE
		1484	void inline_size
		1485	periodics_reify (EV_P)
		1486	{
		1487	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1488	{
		1489	ev_periodic *w = (ev_periodic *)periodics [0];
		1490
		1491	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1492
		1493	/* first reschedule or stop timer */
		1494	if (w->reschedule_cb)
419	{	1495	{
420	evtimer_stop (w); /* nonrepeating: stop timer */	1496	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
421	--timercnt; /* maybe pass by reference instead? */	1497	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1498	downheap (periodics, periodiccnt, 0);
422	}	1499	}
		1500	else if (w->interval)
		1501	{
		1502	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1503	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1504	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1505	downheap (periodics, periodiccnt, 0);
		1506	}
		1507	else
		1508	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
423		1509
424	event ((struct ev_watcher *)w, EV_TIMEOUT);	1510	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
425	}	1511	}
426	}	1512	}
427		1513
428	static void	1514	static void noinline
429	time_update ()	1515	periodics_reschedule (EV_P)
430	{	1516	{
431	int i;	1517	int i;
432	ev_now = ev_time ();
433		1518
434	if (have_monotonic)	1519	/* adjust periodics after time jump */
		1520	for (i = 0; i < periodiccnt; ++i)
		1521	{
		1522	ev_periodic *w = (ev_periodic *)periodics [i];
		1523
		1524	if (w->reschedule_cb)
		1525	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1526	else if (w->interval)
		1527	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
435	{	1528	}
436	ev_tstamp odiff = diff;
437		1529
438	/* detecting time jumps is much more difficult */	1530	/* now rebuild the heap */
439	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1531	for (i = periodiccnt >> 1; i--; )
		1532	downheap (periodics, periodiccnt, i);
		1533	}
		1534	#endif
		1535
		1536	#if EV_IDLE_ENABLE
		1537	void inline_size
		1538	idle_reify (EV_P)
		1539	{
		1540	if (expect_false (idleall))
		1541	{
		1542	int pri;
		1543
		1544	for (pri = NUMPRI; pri--; )
440	{	1545	{
		1546	if (pendingcnt [pri])
		1547	break;
		1548
		1549	if (idlecnt [pri])
		1550	{
		1551	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1552	break;
		1553	}
		1554	}
		1555	}
		1556	}
		1557	#endif
		1558
		1559	void inline_speed
		1560	time_update (EV_P_ ev_tstamp max_block)
		1561	{
		1562	int i;
		1563
		1564	#if EV_USE_MONOTONIC
		1565	if (expect_true (have_monotonic))
		1566	{
		1567	ev_tstamp odiff = rtmn_diff;
		1568
441	now = get_clock ();	1569	mn_now = get_clock ();
		1570
		1571	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1572	/* interpolate in the meantime */
		1573	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1574	{
		1575	ev_rt_now = rtmn_diff + mn_now;
		1576	return;
		1577	}
		1578
		1579	now_floor = mn_now;
		1580	ev_rt_now = ev_time ();
		1581
		1582	/* loop a few times, before making important decisions.
		1583	* on the choice of "4": one iteration isn't enough,
		1584	* in case we get preempted during the calls to
		1585	* ev_time and get_clock. a second call is almost guaranteed
		1586	* to succeed in that case, though. and looping a few more times
		1587	* doesn't hurt either as we only do this on time-jumps or
		1588	* in the unlikely event of having been preempted here.
		1589	*/
		1590	for (i = 4; --i; )
		1591	{
442	diff = ev_now - now;	1592	rtmn_diff = ev_rt_now - mn_now;
443		1593
444	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1594	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
445	return; /* all is well */	1595	return; /* all is well */
446		1596
447	ev_now = ev_time ();	1597	ev_rt_now = ev_time ();
		1598	mn_now = get_clock ();
		1599	now_floor = mn_now;
448	}	1600	}
449		1601
450	/* time jump detected, reschedule atimers */	1602	# if EV_PERIODIC_ENABLE
451	for (i = 0; i < atimercnt; ++i)	1603	periodics_reschedule (EV_A);
		1604	# endif
		1605	/* no timer adjustment, as the monotonic clock doesn't jump */
		1606	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1607	}
		1608	else
		1609	#endif
		1610	{
		1611	ev_rt_now = ev_time ();
		1612
		1613	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
452	{	1614	{
453	struct ev_timer *w = atimers [i];	1615	#if EV_PERIODIC_ENABLE
454	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1616	periodics_reschedule (EV_A);
		1617	#endif
		1618	/* adjust timers. this is easy, as the offset is the same for all of them */
		1619	for (i = 0; i < timercnt; ++i)
		1620	((WT)timers [i])->at += ev_rt_now - mn_now;
455	}	1621	}
456	}
457	else
458	{
459	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
460	/* time jump detected, adjust rtimers */
461	for (i = 0; i < rtimercnt; ++i)
462	rtimers [i]->at += ev_now - now;
463		1622
464	now = ev_now;	1623	mn_now = ev_rt_now;
465	}	1624	}
466	}	1625	}
467		1626
468	int ev_loop_done;	1627	void
		1628	ev_ref (EV_P)
		1629	{
		1630	++activecnt;
		1631	}
469		1632
		1633	void
		1634	ev_unref (EV_P)
		1635	{
		1636	--activecnt;
		1637	}
		1638
		1639	static int loop_done;
		1640
		1641	void
470	void ev_loop (int flags)	1642	ev_loop (EV_P_ int flags)
471	{	1643	{
472	double block;	1644	loop_done = EVUNLOOP_CANCEL;
473	ev_loop_done = flags & EVLOOP_ONESHOT;	1645
		1646	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
474		1647
475	do	1648	do
476	{	1649	{
477	hook_call (EVHOOK_PREPOLL);	1650	#ifndef _WIN32
		1651	if (expect_false (curpid)) /* penalise the forking check even more */
		1652	if (expect_false (getpid () != curpid))
		1653	{
		1654	curpid = getpid ();
		1655	postfork = 1;
		1656	}
		1657	#endif
		1658
		1659	#if EV_FORK_ENABLE
		1660	/* we might have forked, so queue fork handlers */
		1661	if (expect_false (postfork))
		1662	if (forkcnt)
		1663	{
		1664	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1665	call_pending (EV_A);
		1666	}
		1667	#endif
		1668
		1669	/* queue prepare watchers (and execute them) */
		1670	if (expect_false (preparecnt))
		1671	{
		1672	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1673	call_pending (EV_A);
		1674	}
		1675
		1676	if (expect_false (!activecnt))
		1677	break;
		1678
		1679	/* we might have forked, so reify kernel state if necessary */
		1680	if (expect_false (postfork))
		1681	loop_fork (EV_A);
478		1682
479	/* update fd-related kernel structures */	1683	/* update fd-related kernel structures */
480	fd_reify ();	1684	fd_reify (EV_A);
481		1685
482	/* calculate blocking time */	1686	/* calculate blocking time */
483	if (flags & EVLOOP_NONBLOCK)	1687	{
484	block = 0.;	1688	ev_tstamp waittime = 0.;
485	else	1689	ev_tstamp sleeptime = 0.;
		1690
		1691	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
486	{	1692	{
		1693	/* update time to cancel out callback processing overhead */
		1694	time_update (EV_A_ 1e100);
		1695
487	block = MAX_BLOCKTIME;	1696	waittime = MAX_BLOCKTIME;
488		1697
489	if (rtimercnt)	1698	if (timercnt)
490	{	1699	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1700	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
492	if (block > to) block = to;	1701	if (waittime > to) waittime = to;
493	}	1702	}
494		1703
		1704	#if EV_PERIODIC_ENABLE
495	if (atimercnt)	1705	if (periodiccnt)
496	{	1706	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1707	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
498	if (block > to) block = to;	1708	if (waittime > to) waittime = to;
499	}	1709	}
		1710	#endif
500		1711
501	if (block < 0.) block = 0.;	1712	if (expect_false (waittime < timeout_blocktime))
		1713	waittime = timeout_blocktime;
		1714
		1715	sleeptime = waittime - backend_fudge;
		1716
		1717	if (expect_true (sleeptime > io_blocktime))
		1718	sleeptime = io_blocktime;
		1719
		1720	if (sleeptime)
		1721	{
		1722	ev_sleep (sleeptime);
		1723	waittime -= sleeptime;
		1724	}
502	}	1725	}
503		1726
504	method_poll (block);	1727	++loop_count;
		1728	backend_poll (EV_A_ waittime);
505		1729
506	/* update ev_now, do magic */	1730	/* update ev_rt_now, do magic */
507	time_update ();	1731	time_update (EV_A_ waittime + sleeptime);
		1732	}
508		1733
509	hook_call (EVHOOK_POSTPOLL);
510
511	/* put pending timers into pendign queue and reschedule them */	1734	/* queue pending timers and reschedule them */
512	/* absolute timers first */	1735	timers_reify (EV_A); /* relative timers called last */
513	timers_reify (atimers, atimercnt, ev_now);	1736	#if EV_PERIODIC_ENABLE
514	/* relative timers second */	1737	periodics_reify (EV_A); /* absolute timers called first */
515	timers_reify (rtimers, rtimercnt, now);	1738	#endif
516		1739
		1740	#if EV_IDLE_ENABLE
		1741	/* queue idle watchers unless other events are pending */
		1742	idle_reify (EV_A);
		1743	#endif
		1744
		1745	/* queue check watchers, to be executed first */
		1746	if (expect_false (checkcnt))
		1747	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1748
517	call_pending ();	1749	call_pending (EV_A);
518	}	1750	}
519	while (!ev_loop_done);	1751	while (expect_true (
		1752	activecnt
		1753	&& !loop_done
		1754	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1755	));
		1756
		1757	if (loop_done == EVUNLOOP_ONE)
		1758	loop_done = EVUNLOOP_CANCEL;
		1759	}
		1760
		1761	void
		1762	ev_unloop (EV_P_ int how)
		1763	{
		1764	loop_done = how;
520	}	1765	}
521		1766
522	/*****************************************************************************/	1767	/*****************************************************************************/
523		1768
524	static void	1769	void inline_size
525	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1770	wlist_add (WL *head, WL elem)
526	{	1771	{
527	elem->next = *head;	1772	elem->next = *head;
528	*head = elem;	1773	*head = elem;
529	}	1774	}
530		1775
531	static void	1776	void inline_size
532	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1777	wlist_del (WL *head, WL elem)
533	{	1778	{
534	while (*head)	1779	while (*head)
535	{	1780	{
536	if (*head == elem)	1781	if (*head == elem)
537	{	1782	{
…		…
541		1786
542	head = &(*head)->next;	1787	head = &(*head)->next;
543	}	1788	}
544	}	1789	}
545		1790
546	static void	1791	void inline_speed
547	ev_start (struct ev_watcher *w, int active)	1792	clear_pending (EV_P_ W w)
548	{	1793	{
		1794	if (w->pending)
		1795	{
		1796	pendings [ABSPRI (w)][w->pending - 1].w = 0;
549	w->pending = 0;	1797	w->pending = 0;
		1798	}
		1799	}
		1800
		1801	int
		1802	ev_clear_pending (EV_P_ void *w)
		1803	{
		1804	W w_ = (W)w;
		1805	int pending = w_->pending;
		1806
		1807	if (expect_true (pending))
		1808	{
		1809	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1810	w_->pending = 0;
		1811	p->w = 0;
		1812	return p->events;
		1813	}
		1814	else
		1815	return 0;
		1816	}
		1817
		1818	void inline_size
		1819	pri_adjust (EV_P_ W w)
		1820	{
		1821	int pri = w->priority;
		1822	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1823	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1824	w->priority = pri;
		1825	}
		1826
		1827	void inline_speed
		1828	ev_start (EV_P_ W w, int active)
		1829	{
		1830	pri_adjust (EV_A_ w);
550	w->active = active;	1831	w->active = active;
		1832	ev_ref (EV_A);
551	}	1833	}
552		1834
553	static void	1835	void inline_size
554	ev_stop (struct ev_watcher *w)	1836	ev_stop (EV_P_ W w)
555	{	1837	{
556	if (w->pending)	1838	ev_unref (EV_A);
557	pendings [w->pending - 1].w = 0;
558
559	w->active = 0;	1839	w->active = 0;
560	/* nop */
561	}	1840	}
562		1841
563	/*****************************************************************************/	1842	/*****************************************************************************/
564		1843
565	void	1844	void noinline
566	evio_start (struct ev_io *w)	1845	ev_io_start (EV_P_ ev_io *w)
		1846	{
		1847	int fd = w->fd;
		1848
		1849	if (expect_false (ev_is_active (w)))
		1850	return;
		1851
		1852	assert (("ev_io_start called with negative fd", fd >= 0));
		1853
		1854	ev_start (EV_A_ (W)w, 1);
		1855	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1856	wlist_add (&anfds[fd].head, (WL)w);
		1857
		1858	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1859	w->events &= ~EV_IOFDSET;
		1860	}
		1861
		1862	void noinline
		1863	ev_io_stop (EV_P_ ev_io *w)
		1864	{
		1865	clear_pending (EV_A_ (W)w);
		1866	if (expect_false (!ev_is_active (w)))
		1867	return;
		1868
		1869	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1870
		1871	wlist_del (&anfds[w->fd].head, (WL)w);
		1872	ev_stop (EV_A_ (W)w);
		1873
		1874	fd_change (EV_A_ w->fd, 1);
		1875	}
		1876
		1877	void noinline
		1878	ev_timer_start (EV_P_ ev_timer *w)
		1879	{
		1880	if (expect_false (ev_is_active (w)))
		1881	return;
		1882
		1883	((WT)w)->at += mn_now;
		1884
		1885	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1886
		1887	ev_start (EV_A_ (W)w, ++timercnt);
		1888	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1889	timers [timercnt - 1] = (WT)w;
		1890	upheap (timers, timercnt - 1);
		1891
		1892	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1893	}
		1894
		1895	void noinline
		1896	ev_timer_stop (EV_P_ ev_timer *w)
		1897	{
		1898	clear_pending (EV_A_ (W)w);
		1899	if (expect_false (!ev_is_active (w)))
		1900	return;
		1901
		1902	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1903
		1904	{
		1905	int active = ((W)w)->active;
		1906
		1907	if (expect_true (--active < --timercnt))
		1908	{
		1909	timers [active] = timers [timercnt];
		1910	adjustheap (timers, timercnt, active);
		1911	}
		1912	}
		1913
		1914	((WT)w)->at -= mn_now;
		1915
		1916	ev_stop (EV_A_ (W)w);
		1917	}
		1918
		1919	void noinline
		1920	ev_timer_again (EV_P_ ev_timer *w)
567	{	1921	{
568	if (ev_is_active (w))	1922	if (ev_is_active (w))
569	return;
570
571	int fd = w->fd;
572
573	ev_start ((struct ev_watcher *)w, 1);
574	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
575	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
576
577	++fdchangecnt;
578	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
579	fdchanges [fdchangecnt - 1] = fd;
580	}
581
582	void
583	evio_stop (struct ev_io *w)
584	{
585	if (!ev_is_active (w))
586	return;
587
588	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
589	ev_stop ((struct ev_watcher *)w);
590
591	++fdchangecnt;
592	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
593	fdchanges [fdchangecnt - 1] = w->fd;
594	}
595
596	void
597	evtimer_start (struct ev_timer *w)
598	{
599	if (ev_is_active (w))
600	return;
601
602	if (w->is_abs)
603	{	1923	{
604	/* this formula differs from the one in timer_reify becuse we do not round up */
605	if (w->repeat)	1924	if (w->repeat)
606	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1925	{
		1926	((WT)w)->at = mn_now + w->repeat;
		1927	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1928	}
		1929	else
		1930	ev_timer_stop (EV_A_ w);
		1931	}
		1932	else if (w->repeat)
		1933	{
		1934	w->at = w->repeat;
		1935	ev_timer_start (EV_A_ w);
		1936	}
		1937	}
607		1938
608	ev_start ((struct ev_watcher *)w, ++atimercnt);	1939	#if EV_PERIODIC_ENABLE
609	array_needsize (atimers, atimermax, atimercnt, );	1940	void noinline
610	atimers [atimercnt - 1] = w;	1941	ev_periodic_start (EV_P_ ev_periodic *w)
611	upheap (atimers, atimercnt - 1);	1942	{
		1943	if (expect_false (ev_is_active (w)))
		1944	return;
		1945
		1946	if (w->reschedule_cb)
		1947	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1948	else if (w->interval)
		1949	{
		1950	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1951	/* this formula differs from the one in periodic_reify because we do not always round up */
		1952	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
612	}	1953	}
613	else	1954	else
614	{	1955	((WT)w)->at = w->offset;
615	w->at += now;
616		1956
617	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1957	ev_start (EV_A_ (W)w, ++periodiccnt);
618	array_needsize (rtimers, rtimermax, rtimercnt, );	1958	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
619	rtimers [rtimercnt - 1] = w;	1959	periodics [periodiccnt - 1] = (WT)w;
620	upheap (rtimers, rtimercnt - 1);	1960	upheap (periodics, periodiccnt - 1);
621	}
622		1961
		1962	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
623	}	1963	}
624		1964
625	void	1965	void noinline
626	evtimer_stop (struct ev_timer *w)	1966	ev_periodic_stop (EV_P_ ev_periodic *w)
627	{	1967	{
		1968	clear_pending (EV_A_ (W)w);
628	if (!ev_is_active (w))	1969	if (expect_false (!ev_is_active (w)))
629	return;	1970	return;
630		1971
631	if (w->is_abs)	1972	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1973
632	{	1974	{
633	if (w->active < atimercnt--)	1975	int active = ((W)w)->active;
		1976
		1977	if (expect_true (--active < --periodiccnt))
634	{	1978	{
635	atimers [w->active - 1] = atimers [atimercnt];	1979	periodics [active] = periodics [periodiccnt];
636	downheap (atimers, atimercnt, w->active - 1);	1980	adjustheap (periodics, periodiccnt, active);
637	}	1981	}
638	}	1982	}
639	else
640	{
641	if (w->active < rtimercnt--)
642	{
643	rtimers [w->active - 1] = rtimers [rtimercnt];
644	downheap (rtimers, rtimercnt, w->active - 1);
645	}
646	}
647		1983
648	ev_stop ((struct ev_watcher *)w);	1984	ev_stop (EV_A_ (W)w);
649	}	1985	}
650		1986
651	void	1987	void noinline
		1988	ev_periodic_again (EV_P_ ev_periodic *w)
		1989	{
		1990	/* TODO: use adjustheap and recalculation */
		1991	ev_periodic_stop (EV_A_ w);
		1992	ev_periodic_start (EV_A_ w);
		1993	}
		1994	#endif
		1995
		1996	#ifndef SA_RESTART
		1997	# define SA_RESTART 0
		1998	#endif
		1999
		2000	void noinline
652	evsignal_start (struct ev_signal *w)	2001	ev_signal_start (EV_P_ ev_signal *w)
653	{	2002	{
		2003	#if EV_MULTIPLICITY
		2004	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2005	#endif
654	if (ev_is_active (w))	2006	if (expect_false (ev_is_active (w)))
655	return;	2007	return;
656		2008
657	ev_start ((struct ev_watcher *)w, 1);	2009	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2010
		2011	evpipe_init (EV_A);
		2012
		2013	{
		2014	#ifndef _WIN32
		2015	sigset_t full, prev;
		2016	sigfillset (&full);
		2017	sigprocmask (SIG_SETMASK, &full, &prev);
		2018	#endif
		2019
658	array_needsize (signals, signalmax, w->signum, signals_init);	2020	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
659	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);
660		2021
		2022	#ifndef _WIN32
		2023	sigprocmask (SIG_SETMASK, &prev, 0);
		2024	#endif
		2025	}
		2026
		2027	ev_start (EV_A_ (W)w, 1);
		2028	wlist_add (&signals [w->signum - 1].head, (WL)w);
		2029
661	if (!w->next)	2030	if (!((WL)w)->next)
662	{	2031	{
		2032	#if _WIN32
		2033	signal (w->signum, ev_sighandler);
		2034	#else
663	struct sigaction sa;	2035	struct sigaction sa;
664	sa.sa_handler = sighandler;	2036	sa.sa_handler = ev_sighandler;
665	sigfillset (&sa.sa_mask);	2037	sigfillset (&sa.sa_mask);
666	sa.sa_flags = 0;	2038	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
667	sigaction (w->signum, &sa, 0);	2039	sigaction (w->signum, &sa, 0);
		2040	#endif
668	}	2041	}
669	}	2042	}
670		2043
671	void	2044	void noinline
672	evsignal_stop (struct ev_signal *w)	2045	ev_signal_stop (EV_P_ ev_signal *w)
673	{	2046	{
		2047	clear_pending (EV_A_ (W)w);
674	if (!ev_is_active (w))	2048	if (expect_false (!ev_is_active (w)))
675	return;	2049	return;
676		2050
677	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	2051	wlist_del (&signals [w->signum - 1].head, (WL)w);
678	ev_stop ((struct ev_watcher *)w);	2052	ev_stop (EV_A_ (W)w);
679		2053
680	if (!signals [w->signum - 1].head)	2054	if (!signals [w->signum - 1].head)
681	signal (w->signum, SIG_DFL);	2055	signal (w->signum, SIG_DFL);
682	}	2056	}
683		2057
		2058	void
		2059	ev_child_start (EV_P_ ev_child *w)
		2060	{
		2061	#if EV_MULTIPLICITY
		2062	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2063	#endif
		2064	if (expect_false (ev_is_active (w)))
		2065	return;
		2066
		2067	ev_start (EV_A_ (W)w, 1);
		2068	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2069	}
		2070
		2071	void
		2072	ev_child_stop (EV_P_ ev_child *w)
		2073	{
		2074	clear_pending (EV_A_ (W)w);
		2075	if (expect_false (!ev_is_active (w)))
		2076	return;
		2077
		2078	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2079	ev_stop (EV_A_ (W)w);
		2080	}
		2081
		2082	#if EV_STAT_ENABLE
		2083
		2084	# ifdef _WIN32
		2085	# undef lstat
		2086	# define lstat(a,b) _stati64 (a,b)
		2087	# endif
		2088
		2089	#define DEF_STAT_INTERVAL 5.0074891
		2090	#define MIN_STAT_INTERVAL 0.1074891
		2091
		2092	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2093
		2094	#if EV_USE_INOTIFY
		2095	# define EV_INOTIFY_BUFSIZE 8192
		2096
		2097	static void noinline
		2098	infy_add (EV_P_ ev_stat *w)
		2099	{
		2100	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);
		2101
		2102	if (w->wd < 0)
		2103	{
		2104	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2105
		2106	/* monitor some parent directory for speedup hints */
		2107	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2108	{
		2109	char path [4096];
		2110	strcpy (path, w->path);
		2111
		2112	do
		2113	{
		2114	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2115	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2116
		2117	char *pend = strrchr (path, '/');
		2118
		2119	if (!pend)
		2120	break; /* whoops, no '/', complain to your admin */
		2121
		2122	*pend = 0;
		2123	w->wd = inotify_add_watch (fs_fd, path, mask);
		2124	}
		2125	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2126	}
		2127	}
		2128	else
		2129	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2130
		2131	if (w->wd >= 0)
		2132	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2133	}
		2134
		2135	static void noinline
		2136	infy_del (EV_P_ ev_stat *w)
		2137	{
		2138	int slot;
		2139	int wd = w->wd;
		2140
		2141	if (wd < 0)
		2142	return;
		2143
		2144	w->wd = -2;
		2145	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2146	wlist_del (&fs_hash [slot].head, (WL)w);
		2147
		2148	/* remove this watcher, if others are watching it, they will rearm */
		2149	inotify_rm_watch (fs_fd, wd);
		2150	}
		2151
		2152	static void noinline
		2153	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2154	{
		2155	if (slot < 0)
		2156	/* overflow, need to check for all hahs slots */
		2157	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2158	infy_wd (EV_A_ slot, wd, ev);
		2159	else
		2160	{
		2161	WL w_;
		2162
		2163	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2164	{
		2165	ev_stat *w = (ev_stat *)w_;
		2166	w_ = w_->next; /* lets us remove this watcher and all before it */
		2167
		2168	if (w->wd == wd || wd == -1)
		2169	{
		2170	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2171	{
		2172	w->wd = -1;
		2173	infy_add (EV_A_ w); /* re-add, no matter what */
		2174	}
		2175
		2176	stat_timer_cb (EV_A_ &w->timer, 0);
		2177	}
		2178	}
		2179	}
		2180	}
		2181
		2182	static void
		2183	infy_cb (EV_P_ ev_io *w, int revents)
		2184	{
		2185	char buf [EV_INOTIFY_BUFSIZE];
		2186	struct inotify_event *ev = (struct inotify_event *)buf;
		2187	int ofs;
		2188	int len = read (fs_fd, buf, sizeof (buf));
		2189
		2190	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2191	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2192	}
		2193
		2194	void inline_size
		2195	infy_init (EV_P)
		2196	{
		2197	if (fs_fd != -2)
		2198	return;
		2199
		2200	fs_fd = inotify_init ();
		2201
		2202	if (fs_fd >= 0)
		2203	{
		2204	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2205	ev_set_priority (&fs_w, EV_MAXPRI);
		2206	ev_io_start (EV_A_ &fs_w);
		2207	}
		2208	}
		2209
		2210	void inline_size
		2211	infy_fork (EV_P)
		2212	{
		2213	int slot;
		2214
		2215	if (fs_fd < 0)
		2216	return;
		2217
		2218	close (fs_fd);
		2219	fs_fd = inotify_init ();
		2220
		2221	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2222	{
		2223	WL w_ = fs_hash [slot].head;
		2224	fs_hash [slot].head = 0;
		2225
		2226	while (w_)
		2227	{
		2228	ev_stat *w = (ev_stat *)w_;
		2229	w_ = w_->next; /* lets us add this watcher */
		2230
		2231	w->wd = -1;
		2232
		2233	if (fs_fd >= 0)
		2234	infy_add (EV_A_ w); /* re-add, no matter what */
		2235	else
		2236	ev_timer_start (EV_A_ &w->timer);
		2237	}
		2238
		2239	}
		2240	}
		2241
		2242	#endif
		2243
		2244	void
		2245	ev_stat_stat (EV_P_ ev_stat *w)
		2246	{
		2247	if (lstat (w->path, &w->attr) < 0)
		2248	w->attr.st_nlink = 0;
		2249	else if (!w->attr.st_nlink)
		2250	w->attr.st_nlink = 1;
		2251	}
		2252
		2253	static void noinline
		2254	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2255	{
		2256	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2257
		2258	/* we copy this here each the time so that */
		2259	/* prev has the old value when the callback gets invoked */
		2260	w->prev = w->attr;
		2261	ev_stat_stat (EV_A_ w);
		2262
		2263	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2264	if (
		2265	w->prev.st_dev != w->attr.st_dev
		2266	|| w->prev.st_ino != w->attr.st_ino
		2267	|| w->prev.st_mode != w->attr.st_mode
		2268	|| w->prev.st_nlink != w->attr.st_nlink
		2269	|| w->prev.st_uid != w->attr.st_uid
		2270	|| w->prev.st_gid != w->attr.st_gid
		2271	|| w->prev.st_rdev != w->attr.st_rdev
		2272	|| w->prev.st_size != w->attr.st_size
		2273	|| w->prev.st_atime != w->attr.st_atime
		2274	|| w->prev.st_mtime != w->attr.st_mtime
		2275	|| w->prev.st_ctime != w->attr.st_ctime
		2276	) {
		2277	#if EV_USE_INOTIFY
		2278	infy_del (EV_A_ w);
		2279	infy_add (EV_A_ w);
		2280	ev_stat_stat (EV_A_ w); /* avoid race... */
		2281	#endif
		2282
		2283	ev_feed_event (EV_A_ w, EV_STAT);
		2284	}
		2285	}
		2286
		2287	void
		2288	ev_stat_start (EV_P_ ev_stat *w)
		2289	{
		2290	if (expect_false (ev_is_active (w)))
		2291	return;
		2292
		2293	/* since we use memcmp, we need to clear any padding data etc. */
		2294	memset (&w->prev, 0, sizeof (ev_statdata));
		2295	memset (&w->attr, 0, sizeof (ev_statdata));
		2296
		2297	ev_stat_stat (EV_A_ w);
		2298
		2299	if (w->interval < MIN_STAT_INTERVAL)
		2300	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2301
		2302	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2303	ev_set_priority (&w->timer, ev_priority (w));
		2304
		2305	#if EV_USE_INOTIFY
		2306	infy_init (EV_A);
		2307
		2308	if (fs_fd >= 0)
		2309	infy_add (EV_A_ w);
		2310	else
		2311	#endif
		2312	ev_timer_start (EV_A_ &w->timer);
		2313
		2314	ev_start (EV_A_ (W)w, 1);
		2315	}
		2316
		2317	void
		2318	ev_stat_stop (EV_P_ ev_stat *w)
		2319	{
		2320	clear_pending (EV_A_ (W)w);
		2321	if (expect_false (!ev_is_active (w)))
		2322	return;
		2323
		2324	#if EV_USE_INOTIFY
		2325	infy_del (EV_A_ w);
		2326	#endif
		2327	ev_timer_stop (EV_A_ &w->timer);
		2328
		2329	ev_stop (EV_A_ (W)w);
		2330	}
		2331	#endif
		2332
		2333	#if EV_IDLE_ENABLE
		2334	void
		2335	ev_idle_start (EV_P_ ev_idle *w)
		2336	{
		2337	if (expect_false (ev_is_active (w)))
		2338	return;
		2339
		2340	pri_adjust (EV_A_ (W)w);
		2341
		2342	{
		2343	int active = ++idlecnt [ABSPRI (w)];
		2344
		2345	++idleall;
		2346	ev_start (EV_A_ (W)w, active);
		2347
		2348	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2349	idles [ABSPRI (w)][active - 1] = w;
		2350	}
		2351	}
		2352
		2353	void
		2354	ev_idle_stop (EV_P_ ev_idle *w)
		2355	{
		2356	clear_pending (EV_A_ (W)w);
		2357	if (expect_false (!ev_is_active (w)))
		2358	return;
		2359
		2360	{
		2361	int active = ((W)w)->active;
		2362
		2363	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2364	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2365
		2366	ev_stop (EV_A_ (W)w);
		2367	--idleall;
		2368	}
		2369	}
		2370	#endif
		2371
		2372	void
		2373	ev_prepare_start (EV_P_ ev_prepare *w)
		2374	{
		2375	if (expect_false (ev_is_active (w)))
		2376	return;
		2377
		2378	ev_start (EV_A_ (W)w, ++preparecnt);
		2379	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2380	prepares [preparecnt - 1] = w;
		2381	}
		2382
		2383	void
		2384	ev_prepare_stop (EV_P_ ev_prepare *w)
		2385	{
		2386	clear_pending (EV_A_ (W)w);
		2387	if (expect_false (!ev_is_active (w)))
		2388	return;
		2389
		2390	{
		2391	int active = ((W)w)->active;
		2392	prepares [active - 1] = prepares [--preparecnt];
		2393	((W)prepares [active - 1])->active = active;
		2394	}
		2395
		2396	ev_stop (EV_A_ (W)w);
		2397	}
		2398
		2399	void
		2400	ev_check_start (EV_P_ ev_check *w)
		2401	{
		2402	if (expect_false (ev_is_active (w)))
		2403	return;
		2404
		2405	ev_start (EV_A_ (W)w, ++checkcnt);
		2406	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2407	checks [checkcnt - 1] = w;
		2408	}
		2409
		2410	void
		2411	ev_check_stop (EV_P_ ev_check *w)
		2412	{
		2413	clear_pending (EV_A_ (W)w);
		2414	if (expect_false (!ev_is_active (w)))
		2415	return;
		2416
		2417	{
		2418	int active = ((W)w)->active;
		2419	checks [active - 1] = checks [--checkcnt];
		2420	((W)checks [active - 1])->active = active;
		2421	}
		2422
		2423	ev_stop (EV_A_ (W)w);
		2424	}
		2425
		2426	#if EV_EMBED_ENABLE
		2427	void noinline
		2428	ev_embed_sweep (EV_P_ ev_embed *w)
		2429	{
		2430	ev_loop (w->other, EVLOOP_NONBLOCK);
		2431	}
		2432
		2433	static void
		2434	embed_io_cb (EV_P_ ev_io *io, int revents)
		2435	{
		2436	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2437
		2438	if (ev_cb (w))
		2439	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2440	else
		2441	ev_loop (w->other, EVLOOP_NONBLOCK);
		2442	}
		2443
		2444	static void
		2445	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2446	{
		2447	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2448
		2449	{
		2450	struct ev_loop *loop = w->other;
		2451
		2452	while (fdchangecnt)
		2453	{
		2454	fd_reify (EV_A);
		2455	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2456	}
		2457	}
		2458	}
		2459
		2460	#if 0
		2461	static void
		2462	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2463	{
		2464	ev_idle_stop (EV_A_ idle);
		2465	}
		2466	#endif
		2467
		2468	void
		2469	ev_embed_start (EV_P_ ev_embed *w)
		2470	{
		2471	if (expect_false (ev_is_active (w)))
		2472	return;
		2473
		2474	{
		2475	struct ev_loop *loop = w->other;
		2476	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2477	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2478	}
		2479
		2480	ev_set_priority (&w->io, ev_priority (w));
		2481	ev_io_start (EV_A_ &w->io);
		2482
		2483	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2484	ev_set_priority (&w->prepare, EV_MINPRI);
		2485	ev_prepare_start (EV_A_ &w->prepare);
		2486
		2487	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2488
		2489	ev_start (EV_A_ (W)w, 1);
		2490	}
		2491
		2492	void
		2493	ev_embed_stop (EV_P_ ev_embed *w)
		2494	{
		2495	clear_pending (EV_A_ (W)w);
		2496	if (expect_false (!ev_is_active (w)))
		2497	return;
		2498
		2499	ev_io_stop (EV_A_ &w->io);
		2500	ev_prepare_stop (EV_A_ &w->prepare);
		2501
		2502	ev_stop (EV_A_ (W)w);
		2503	}
		2504	#endif
		2505
		2506	#if EV_FORK_ENABLE
		2507	void
		2508	ev_fork_start (EV_P_ ev_fork *w)
		2509	{
		2510	if (expect_false (ev_is_active (w)))
		2511	return;
		2512
		2513	ev_start (EV_A_ (W)w, ++forkcnt);
		2514	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2515	forks [forkcnt - 1] = w;
		2516	}
		2517
		2518	void
		2519	ev_fork_stop (EV_P_ ev_fork *w)
		2520	{
		2521	clear_pending (EV_A_ (W)w);
		2522	if (expect_false (!ev_is_active (w)))
		2523	return;
		2524
		2525	{
		2526	int active = ((W)w)->active;
		2527	forks [active - 1] = forks [--forkcnt];
		2528	((W)forks [active - 1])->active = active;
		2529	}
		2530
		2531	ev_stop (EV_A_ (W)w);
		2532	}
		2533	#endif
		2534
		2535	#if EV_ASYNC_ENABLE
		2536	void
		2537	ev_async_start (EV_P_ ev_async *w)
		2538	{
		2539	if (expect_false (ev_is_active (w)))
		2540	return;
		2541
		2542	evpipe_init (EV_A);
		2543
		2544	ev_start (EV_A_ (W)w, ++asynccnt);
		2545	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2546	asyncs [asynccnt - 1] = w;
		2547	}
		2548
		2549	void
		2550	ev_async_stop (EV_P_ ev_async *w)
		2551	{
		2552	clear_pending (EV_A_ (W)w);
		2553	if (expect_false (!ev_is_active (w)))
		2554	return;
		2555
		2556	{
		2557	int active = ((W)w)->active;
		2558	asyncs [active - 1] = asyncs [--asynccnt];
		2559	((W)asyncs [active - 1])->active = active;
		2560	}
		2561
		2562	ev_stop (EV_A_ (W)w);
		2563	}
		2564
		2565	void
		2566	ev_async_send (EV_P_ ev_async *w)
		2567	{
		2568	w->sent = 1;
		2569	evpipe_write (EV_A_ &gotasync);
		2570	}
		2571	#endif
		2572
684	/*****************************************************************************/	2573	/*****************************************************************************/
685	#if 1	2574
		2575	struct ev_once
		2576	{
		2577	ev_io io;
		2578	ev_timer to;
		2579	void (*cb)(int revents, void *arg);
		2580	void *arg;
		2581	};
686		2582
687	static void	2583	static void
688	sin_cb (struct ev_io *w, int revents)	2584	once_cb (EV_P_ struct ev_once *once, int revents)
689	{	2585	{
690	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2586	void (*cb)(int revents, void *arg) = once->cb;
		2587	void *arg = once->arg;
		2588
		2589	ev_io_stop (EV_A_ &once->io);
		2590	ev_timer_stop (EV_A_ &once->to);
		2591	ev_free (once);
		2592
		2593	cb (revents, arg);
691	}	2594	}
692		2595
693	static void	2596	static void
694	ocb (struct ev_timer *w, int revents)	2597	once_cb_io (EV_P_ ev_io *w, int revents)
695	{	2598	{
696	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2599	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
697	evtimer_stop (w);
698	evtimer_start (w);
699	}	2600	}
700		2601
701	static void	2602	static void
702	scb (struct ev_signal *w, int revents)	2603	once_cb_to (EV_P_ ev_timer *w, int revents)
703	{	2604	{
704	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2605	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
705	}	2606	}
706		2607
707	int main (void)	2608	void
		2609	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
708	{	2610	{
709	struct ev_io sin;	2611	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
710		2612
711	ev_init (0);	2613	if (expect_false (!once))
712
713	evw_init (&sin, sin_cb, 55);
714	evio_set (&sin, 0, EV_READ);
715	evio_start (&sin);
716
717	struct ev_timer t[10000];
718
719	#if 1
720	int i;
721	for (i = 0; i < 10000; ++i)
722	{
723	struct ev_timer *w = t + i;
724	evw_init (w, ocb, i);
725	evtimer_set_abs (w, drand48 (), 0.99775533);
726	evtimer_start (w);
727	if (drand48 () < 0.5)
728	evtimer_stop (w);
729	}	2614	{
730	#endif	2615	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
731
732	struct ev_timer t1;
733	evw_init (&t1, ocb, 0);
734	evtimer_set_abs (&t1, 5, 10);
735	evtimer_start (&t1);
736
737	struct ev_signal sig;
738	evw_init (&sig, scb, 65535);
739	evsignal_set (&sig, SIGQUIT);
740	evsignal_start (&sig);
741
742	ev_loop (0);
743
744	return 0;	2616	return;
745	}	2617	}
746		2618
747	#endif	2619	once->cb = cb;
		2620	once->arg = arg;
748		2621
		2622	ev_init (&once->io, once_cb_io);
		2623	if (fd >= 0)
		2624	{
		2625	ev_io_set (&once->io, fd, events);
		2626	ev_io_start (EV_A_ &once->io);
		2627	}
749		2628
		2629	ev_init (&once->to, once_cb_to);
		2630	if (timeout >= 0.)
		2631	{
		2632	ev_timer_set (&once->to, timeout, 0.);
		2633	ev_timer_start (EV_A_ &once->to);
		2634	}
		2635	}
750		2636
		2637	#if EV_MULTIPLICITY
		2638	#include "ev_wrap.h"
		2639	#endif
751		2640
		2641	#ifdef __cplusplus
		2642	}
		2643	#endif
		2644

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