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Comparing libev/ev.c (file contents):
Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs.
Revision 1.229 by root, Fri May 2 08:08:45 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
14	#ifndef HAVE_MONOTONIC	146	#include <signal.h>
15	# ifdef CLOCK_MONOTONIC	147
16	# define HAVE_MONOTONIC 1	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
17	# endif	163	# endif
18	#endif	164	#endif
19		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
20	#ifndef HAVE_SELECT	180	#ifndef EV_USE_SELECT
21	# define HAVE_SELECT 1	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
22	#endif	189	# endif
		190	#endif
23		191
24	#ifndef HAVE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
25	# define HAVE_EPOLL 0	196	# define EV_USE_EPOLL 0
26	#endif	197	# endif
		198	#endif
27		199
28	#ifndef HAVE_REALTIME	200	#ifndef EV_USE_KQUEUE
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	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
30	#endif	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
		242	#ifndef CLOCK_MONOTONIC
		243	# undef EV_USE_MONOTONIC
		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>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		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 */
31		294
32	#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) */
33	#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 */
34		298
35	#include "ev.h"	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
36		309
37	struct ev_watcher {	310	#define expect_false(expr) expect ((expr) != 0, 0)
38	EV_WATCHER (ev_watcher);	311	#define expect_true(expr) expect ((expr) != 0, 1)
39	};	312	#define inline_size static inline
40		313
41	struct ev_watcher_list {	314	#if EV_MINIMAL
42	EV_WATCHER_LIST (ev_watcher_list);	315	# define inline_speed static noinline
43	};	316	#else
		317	# define inline_speed static inline
		318	#endif
44		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
45	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
		328	typedef ev_watcher_time *WT;
47		329
48	static ev_tstamp now, diff; /* monotonic clock */	330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
		336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
		338
		339	#ifdef _WIN32
		340	# include "ev_win32.c"
		341	#endif
		342
		343	/*****************************************************************************/
		344
		345	static void (*syserr_cb)(const char *msg);
		346
		347	void
		348	ev_set_syserr_cb (void (*cb)(const char *msg))
		349	{
		350	syserr_cb = cb;
		351	}
		352
		353	static void noinline
		354	syserr (const char *msg)
		355	{
		356	if (!msg)
		357	msg = "(libev) system error";
		358
		359	if (syserr_cb)
		360	syserr_cb (msg);
		361	else
		362	{
		363	perror (msg);
		364	abort ();
		365	}
		366	}
		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
		383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		384
		385	void
		386	ev_set_allocator (void *(*cb)(void *ptr, long size))
		387	{
		388	alloc = cb;
		389	}
		390
		391	inline_speed void *
		392	ev_realloc (void *ptr, long size)
		393	{
		394	ptr = alloc (ptr, size);
		395
		396	if (!ptr && size)
		397	{
		398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		399	abort ();
		400	}
		401
		402	return ptr;
		403	}
		404
		405	#define ev_malloc(size) ev_realloc (0, (size))
		406	#define ev_free(ptr) ev_realloc ((ptr), 0)
		407
		408	/*****************************************************************************/
		409
		410	typedef struct
		411	{
		412	WL head;
		413	unsigned char events;
		414	unsigned char reify;
		415	#if EV_SELECT_IS_WINSOCKET
		416	SOCKET handle;
		417	#endif
		418	} ANFD;
		419
		420	typedef struct
		421	{
		422	W w;
		423	int events;
		424	} ANPENDING;
		425
		426	#if EV_USE_INOTIFY
		427	typedef struct
		428	{
		429	WL head;
		430	} ANFS;
		431	#endif
		432
		433	#if EV_MULTIPLICITY
		434
		435	struct ev_loop
		436	{
		437	ev_tstamp ev_rt_now;
		438	#define ev_rt_now ((loop)->ev_rt_now)
		439	#define VAR(name,decl) decl;
		440	#include "ev_vars.h"
		441	#undef VAR
		442	};
		443	#include "ev_wrap.h"
		444
		445	static struct ev_loop default_loop_struct;
		446	struct ev_loop *ev_default_loop_ptr;
		447
		448	#else
		449
49	ev_tstamp ev_now;	450	ev_tstamp ev_rt_now;
50	int ev_method;	451	#define VAR(name,decl) static decl;
		452	#include "ev_vars.h"
		453	#undef VAR
51		454
52	static int have_monotonic; /* runtime */	455	static int ev_default_loop_ptr;
53		456
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	457	#endif
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		458
58	/*****************************************************************************/	459	/*****************************************************************************/
59		460
60	ev_tstamp	461	ev_tstamp
61	ev_time (void)	462	ev_time (void)
62	{	463	{
63	#if HAVE_REALTIME	464	#if EV_USE_REALTIME
64	struct timespec ts;	465	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	466	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	467	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	468	#else
68	struct timeval tv;	469	struct timeval tv;
69	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	472	#endif
72	}	473	}
73		474
74	static ev_tstamp	475	ev_tstamp inline_size
75	get_clock (void)	476	get_clock (void)
76	{	477	{
77	#if HAVE_MONOTONIC	478	#if EV_USE_MONOTONIC
78	if (have_monotonic)	479	if (expect_true (have_monotonic))
79	{	480	{
80	struct timespec ts;	481	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	482	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	483	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	484	}
84	#endif	485	#endif
85		486
86	return ev_time ();	487	return ev_time ();
87	}	488	}
88		489
89	#define array_needsize(base,cur,cnt,init) \	490	#if EV_MULTIPLICITY
90	if ((cnt) > cur) \	491	ev_tstamp
91	{ \	492	ev_now (EV_P)
92	int newcnt = cur ? cur << 1 : 16; \	493	{
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	494	return ev_rt_now;
94	base = realloc (base, sizeof (*base) * (newcnt)); \	495	}
95	init (base + cur, newcnt - cur); \	496	#endif
96	cur = newcnt; \	497
		498	void
		499	ev_sleep (ev_tstamp delay)
		500	{
		501	if (delay > 0.)
97	}	502	{
		503	#if EV_USE_NANOSLEEP
		504	struct timespec ts;
		505
		506	ts.tv_sec = (time_t)delay;
		507	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		508
		509	nanosleep (&ts, 0);
		510	#elif defined(_WIN32)
		511	Sleep ((unsigned long)(delay * 1e3));
		512	#else
		513	struct timeval tv;
		514
		515	tv.tv_sec = (time_t)delay;
		516	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		517
		518	select (0, 0, 0, 0, &tv);
		519	#endif
		520	}
		521	}
98		522
99	/*****************************************************************************/	523	/*****************************************************************************/
100		524
		525	int inline_size
		526	array_nextsize (int elem, int cur, int cnt)
		527	{
		528	int ncur = cur + 1;
		529
		530	do
		531	ncur <<= 1;
		532	while (cnt > ncur);
		533
		534	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		535	if (elem * ncur > 4096)
		536	{
		537	ncur *= elem;
		538	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		539	ncur = ncur - sizeof (void *) * 4;
		540	ncur /= elem;
		541	}
		542
		543	return ncur;
		544	}
		545
		546	static noinline void *
		547	array_realloc (int elem, void *base, int *cur, int cnt)
		548	{
		549	*cur = array_nextsize (elem, *cur, cnt);
		550	return ev_realloc (base, elem * *cur);
		551	}
		552
		553	#define array_needsize(type,base,cur,cnt,init) \
		554	if (expect_false ((cnt) > (cur))) \
		555	{ \
		556	int ocur_ = (cur); \
		557	(base) = (type *)array_realloc \
		558	(sizeof (type), (base), &(cur), (cnt)); \
		559	init ((base) + (ocur_), (cur) - ocur_); \
		560	}
		561
		562	#if 0
		563	#define array_slim(type,stem) \
		564	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		565	{ \
		566	stem ## max = array_roundsize (stem ## cnt >> 1); \
		567	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		568	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		569	}
		570	#endif
		571
		572	#define array_free(stem, idx) \
		573	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		574
		575	/*****************************************************************************/
		576
		577	void noinline
		578	ev_feed_event (EV_P_ void *w, int revents)
		579	{
		580	W w_ = (W)w;
		581	int pri = ABSPRI (w_);
		582
		583	if (expect_false (w_->pending))
		584	pendings [pri][w_->pending - 1].events |= revents;
		585	else
		586	{
		587	w_->pending = ++pendingcnt [pri];
		588	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		589	pendings [pri][w_->pending - 1].w = w_;
		590	pendings [pri][w_->pending - 1].events = revents;
		591	}
		592	}
		593
		594	void inline_speed
		595	queue_events (EV_P_ W *events, int eventcnt, int type)
		596	{
		597	int i;
		598
		599	for (i = 0; i < eventcnt; ++i)
		600	ev_feed_event (EV_A_ events [i], type);
		601	}
		602
		603	/*****************************************************************************/
		604
		605	void inline_size
		606	anfds_init (ANFD *base, int count)
		607	{
		608	while (count--)
		609	{
		610	base->head = 0;
		611	base->events = EV_NONE;
		612	base->reify = 0;
		613
		614	++base;
		615	}
		616	}
		617
		618	void inline_speed
		619	fd_event (EV_P_ int fd, int revents)
		620	{
		621	ANFD *anfd = anfds + fd;
		622	ev_io *w;
		623
		624	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		625	{
		626	int ev = w->events & revents;
		627
		628	if (ev)
		629	ev_feed_event (EV_A_ (W)w, ev);
		630	}
		631	}
		632
		633	void
		634	ev_feed_fd_event (EV_P_ int fd, int revents)
		635	{
		636	if (fd >= 0 && fd < anfdmax)
		637	fd_event (EV_A_ fd, revents);
		638	}
		639
		640	void inline_size
		641	fd_reify (EV_P)
		642	{
		643	int i;
		644
		645	for (i = 0; i < fdchangecnt; ++i)
		646	{
		647	int fd = fdchanges [i];
		648	ANFD *anfd = anfds + fd;
		649	ev_io *w;
		650
		651	unsigned char events = 0;
		652
		653	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		654	events |= (unsigned char)w->events;
		655
		656	#if EV_SELECT_IS_WINSOCKET
		657	if (events)
		658	{
		659	unsigned long argp;
		660	#ifdef EV_FD_TO_WIN32_HANDLE
		661	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		662	#else
		663	anfd->handle = _get_osfhandle (fd);
		664	#endif
		665	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		666	}
		667	#endif
		668
		669	{
		670	unsigned char o_events = anfd->events;
		671	unsigned char o_reify = anfd->reify;
		672
		673	anfd->reify = 0;
		674	anfd->events = events;
		675
		676	if (o_events != events || o_reify & EV_IOFDSET)
		677	backend_modify (EV_A_ fd, o_events, events);
		678	}
		679	}
		680
		681	fdchangecnt = 0;
		682	}
		683
		684	void inline_size
		685	fd_change (EV_P_ int fd, int flags)
		686	{
		687	unsigned char reify = anfds [fd].reify;
		688	anfds [fd].reify |= flags;
		689
		690	if (expect_true (!reify))
		691	{
		692	++fdchangecnt;
		693	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		694	fdchanges [fdchangecnt - 1] = fd;
		695	}
		696	}
		697
		698	void inline_speed
		699	fd_kill (EV_P_ int fd)
		700	{
		701	ev_io *w;
		702
		703	while ((w = (ev_io *)anfds [fd].head))
		704	{
		705	ev_io_stop (EV_A_ w);
		706	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		707	}
		708	}
		709
		710	int inline_size
		711	fd_valid (int fd)
		712	{
		713	#ifdef _WIN32
		714	return _get_osfhandle (fd) != -1;
		715	#else
		716	return fcntl (fd, F_GETFD) != -1;
		717	#endif
		718	}
		719
		720	/* called on EBADF to verify fds */
		721	static void noinline
		722	fd_ebadf (EV_P)
		723	{
		724	int fd;
		725
		726	for (fd = 0; fd < anfdmax; ++fd)
		727	if (anfds [fd].events)
		728	if (!fd_valid (fd) == -1 && errno == EBADF)
		729	fd_kill (EV_A_ fd);
		730	}
		731
		732	/* called on ENOMEM in select/poll to kill some fds and retry */
		733	static void noinline
		734	fd_enomem (EV_P)
		735	{
		736	int fd;
		737
		738	for (fd = anfdmax; fd--; )
		739	if (anfds [fd].events)
		740	{
		741	fd_kill (EV_A_ fd);
		742	return;
		743	}
		744	}
		745
		746	/* usually called after fork if backend needs to re-arm all fds from scratch */
		747	static void noinline
		748	fd_rearm_all (EV_P)
		749	{
		750	int fd;
		751
		752	for (fd = 0; fd < anfdmax; ++fd)
		753	if (anfds [fd].events)
		754	{
		755	anfds [fd].events = 0;
		756	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		757	}
		758	}
		759
		760	/*****************************************************************************/
		761
		762	/* towards the root */
		763	void inline_speed
		764	upheap (WT *heap, int k)
		765	{
		766	WT w = heap [k];
		767
		768	for (;;)
		769	{
		770	int p = k >> 1;
		771
		772	/* maybe we could use a dummy element at heap [0]? */
		773	if (!p || heap [p]->at <= w->at)
		774	break;
		775
		776	heap [k] = heap [p];
		777	((W)heap [k])->active = k;
		778	k = p;
		779	}
		780
		781	heap [k] = w;
		782	((W)heap [k])->active = k;
		783	}
		784
		785	/* away from the root */
		786	void inline_speed
		787	downheap (WT *heap, int N, int k)
		788	{
		789	WT w = heap [k];
		790
		791	for (;;)
		792	{
		793	int c = k << 1;
		794
		795	if (c > N)
		796	break;
		797
		798	c += c < N && heap [c]->at > heap [c + 1]->at
		799	? 1 : 0;
		800
		801	if (w->at <= heap [c]->at)
		802	break;
		803
		804	heap [k] = heap [c];
		805	((W)heap [k])->active = k;
		806
		807	k = c;
		808	}
		809
		810	heap [k] = w;
		811	((W)heap [k])->active = k;
		812	}
		813
		814	void inline_size
		815	adjustheap (WT *heap, int N, int k)
		816	{
		817	upheap (heap, k);
		818	downheap (heap, N, k);
		819	}
		820
		821	/*****************************************************************************/
		822
101	typedef struct	823	typedef struct
102	{	824	{
103	struct ev_io *head;	825	WL head;
104	unsigned char wev, rev; /* want, received event set */	826	EV_ATOMIC_T gotsig;
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void
114	anfds_init (ANFD *base, int count)
115	{
116	while (count--)
117	{
118	base->head = 0;
119	base->wev = base->rev = EV_NONE;
120	++base;
121	}
122	}
123
124	typedef struct
125	{
126	W w;
127	int events;
128	} ANPENDING;
129
130	static ANPENDING *pendings;
131	static int pendingmax, pendingcnt;
132
133	static void
134	event (W w, int events)
135	{
136	w->pending = ++pendingcnt;
137	array_needsize (pendings, pendingmax, pendingcnt, );
138	pendings [pendingcnt - 1].w = w;
139	pendings [pendingcnt - 1].events = events;
140	}
141
142	static void
143	fd_event (int fd, int events)
144	{
145	ANFD *anfd = anfds + fd;
146	struct ev_io *w;
147
148	for (w = anfd->head; w; w = w->next)
149	{
150	int ev = w->events & events;
151
152	if (ev)
153	event ((W)w, ev);
154	}
155	}
156
157	static void
158	queue_events (W *events, int eventcnt, int type)
159	{
160	int i;
161
162	for (i = 0; i < eventcnt; ++i)
163	event (events [i], type);
164	}
165
166	/*****************************************************************************/
167
168	static struct ev_timer **atimers;
169	static int atimermax, atimercnt;
170
171	static struct ev_timer **rtimers;
172	static int rtimermax, rtimercnt;
173
174	static void
175	upheap (struct ev_timer **timers, int k)
176	{
177	struct ev_timer *w = timers [k];
178
179	while (k && timers [k >> 1]->at > w->at)
180	{
181	timers [k] = timers [k >> 1];
182	timers [k]->active = k + 1;
183	k >>= 1;
184	}
185
186	timers [k] = w;
187	timers [k]->active = k + 1;
188
189	}
190
191	static void
192	downheap (struct ev_timer **timers, int N, int k)
193	{
194	struct ev_timer *w = timers [k];
195
196	while (k < (N >> 1))
197	{
198	int j = k << 1;
199
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
201	++j;
202
203	if (w->at <= timers [j]->at)
204	break;
205
206	timers [k] = timers [j];
207	timers [k]->active = k + 1;
208	k = j;
209	}
210
211	timers [k] = w;
212	timers [k]->active = k + 1;
213	}
214
215	/*****************************************************************************/
216
217	typedef struct
218	{
219	struct ev_signal *head;
220	sig_atomic_t gotsig;
221	} ANSIG;	827	} ANSIG;
222		828
223	static ANSIG *signals;	829	static ANSIG *signals;
224	static int signalmax;	830	static int signalmax;
225		831
226	static int sigpipe [2];	832	static EV_ATOMIC_T gotsig;
227	static sig_atomic_t gotsig;
228	static struct ev_io sigev;
229		833
230	static void	834	void inline_size
231	signals_init (ANSIG *base, int count)	835	signals_init (ANSIG *base, int count)
232	{	836	{
233	while (count--)	837	while (count--)
234	{	838	{
235	base->head = 0;	839	base->head = 0;
236	base->gotsig = 0;	840	base->gotsig = 0;
		841
237	++base;	842	++base;
238	}	843	}
239	}	844	}
240		845
		846	/*****************************************************************************/
		847
		848	void inline_speed
		849	fd_intern (int fd)
		850	{
		851	#ifdef _WIN32
		852	int arg = 1;
		853	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		854	#else
		855	fcntl (fd, F_SETFD, FD_CLOEXEC);
		856	fcntl (fd, F_SETFL, O_NONBLOCK);
		857	#endif
		858	}
		859
		860	static void noinline
		861	evpipe_init (EV_P)
		862	{
		863	if (!ev_is_active (&pipeev))
		864	{
		865	#if EV_USE_EVENTFD
		866	if ((evfd = eventfd (0, 0)) >= 0)
		867	{
		868	evpipe [0] = -1;
		869	fd_intern (evfd);
		870	ev_io_set (&pipeev, evfd, EV_READ);
		871	}
		872	else
		873	#endif
		874	{
		875	while (pipe (evpipe))
		876	syserr ("(libev) error creating signal/async pipe");
		877
		878	fd_intern (evpipe [0]);
		879	fd_intern (evpipe [1]);
		880	ev_io_set (&pipeev, evpipe [0], EV_READ);
		881	}
		882
		883	ev_io_start (EV_A_ &pipeev);
		884	ev_unref (EV_A); /* watcher should not keep loop alive */
		885	}
		886	}
		887
		888	void inline_size
		889	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		890	{
		891	if (!*flag)
		892	{
		893	int old_errno = errno; /* save errno because write might clobber it */
		894
		895	*flag = 1;
		896
		897	#if EV_USE_EVENTFD
		898	if (evfd >= 0)
		899	{
		900	uint64_t counter = 1;
		901	write (evfd, &counter, sizeof (uint64_t));
		902	}
		903	else
		904	#endif
		905	write (evpipe [1], &old_errno, 1);
		906
		907	errno = old_errno;
		908	}
		909	}
		910
241	static void	911	static void
		912	pipecb (EV_P_ ev_io *iow, int revents)
		913	{
		914	#if EV_USE_EVENTFD
		915	if (evfd >= 0)
		916	{
		917	uint64_t counter = 1;
		918	read (evfd, &counter, sizeof (uint64_t));
		919	}
		920	else
		921	#endif
		922	{
		923	char dummy;
		924	read (evpipe [0], &dummy, 1);
		925	}
		926
		927	if (gotsig && ev_is_default_loop (EV_A))
		928	{
		929	int signum;
		930	gotsig = 0;
		931
		932	for (signum = signalmax; signum--; )
		933	if (signals [signum].gotsig)
		934	ev_feed_signal_event (EV_A_ signum + 1);
		935	}
		936
		937	#if EV_ASYNC_ENABLE
		938	if (gotasync)
		939	{
		940	int i;
		941	gotasync = 0;
		942
		943	for (i = asynccnt; i--; )
		944	if (asyncs [i]->sent)
		945	{
		946	asyncs [i]->sent = 0;
		947	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		948	}
		949	}
		950	#endif
		951	}
		952
		953	/*****************************************************************************/
		954
		955	static void
242	sighandler (int signum)	956	ev_sighandler (int signum)
243	{	957	{
		958	#if EV_MULTIPLICITY
		959	struct ev_loop *loop = &default_loop_struct;
		960	#endif
		961
		962	#if _WIN32
		963	signal (signum, ev_sighandler);
		964	#endif
		965
244	signals [signum - 1].gotsig = 1;	966	signals [signum - 1].gotsig = 1;
		967	evpipe_write (EV_A_ &gotsig);
		968	}
245		969
246	if (!gotsig)	970	void noinline
		971	ev_feed_signal_event (EV_P_ int signum)
		972	{
		973	WL w;
		974
		975	#if EV_MULTIPLICITY
		976	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		977	#endif
		978
		979	--signum;
		980
		981	if (signum < 0 || signum >= signalmax)
		982	return;
		983
		984	signals [signum].gotsig = 0;
		985
		986	for (w = signals [signum].head; w; w = w->next)
		987	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		988	}
		989
		990	/*****************************************************************************/
		991
		992	static WL childs [EV_PID_HASHSIZE];
		993
		994	#ifndef _WIN32
		995
		996	static ev_signal childev;
		997
		998	#ifndef WIFCONTINUED
		999	# define WIFCONTINUED(status) 0
		1000	#endif
		1001
		1002	void inline_speed
		1003	child_reap (EV_P_ int chain, int pid, int status)
		1004	{
		1005	ev_child *w;
		1006	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1007
		1008	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1009	{
		1010	if ((w->pid == pid || !w->pid)
		1011	&& (!traced || (w->flags & 1)))
		1012	{
		1013	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1014	w->rpid = pid;
		1015	w->rstatus = status;
		1016	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1017	}
		1018	}
		1019	}
		1020
		1021	#ifndef WCONTINUED
		1022	# define WCONTINUED 0
		1023	#endif
		1024
		1025	static void
		1026	childcb (EV_P_ ev_signal *sw, int revents)
		1027	{
		1028	int pid, status;
		1029
		1030	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1031	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		1032	if (!WCONTINUED
		1033	|| errno != EINVAL
		1034	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1035	return;
		1036
		1037	/* make sure we are called again until all children have been reaped */
		1038	/* we need to do it this way so that the callback gets called before we continue */
		1039	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1040
		1041	child_reap (EV_A_ pid, pid, status);
		1042	if (EV_PID_HASHSIZE > 1)
		1043	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1044	}
		1045
		1046	#endif
		1047
		1048	/*****************************************************************************/
		1049
		1050	#if EV_USE_PORT
		1051	# include "ev_port.c"
		1052	#endif
		1053	#if EV_USE_KQUEUE
		1054	# include "ev_kqueue.c"
		1055	#endif
		1056	#if EV_USE_EPOLL
		1057	# include "ev_epoll.c"
		1058	#endif
		1059	#if EV_USE_POLL
		1060	# include "ev_poll.c"
		1061	#endif
		1062	#if EV_USE_SELECT
		1063	# include "ev_select.c"
		1064	#endif
		1065
		1066	int
		1067	ev_version_major (void)
		1068	{
		1069	return EV_VERSION_MAJOR;
		1070	}
		1071
		1072	int
		1073	ev_version_minor (void)
		1074	{
		1075	return EV_VERSION_MINOR;
		1076	}
		1077
		1078	/* return true if we are running with elevated privileges and should ignore env variables */
		1079	int inline_size
		1080	enable_secure (void)
		1081	{
		1082	#ifdef _WIN32
		1083	return 0;
		1084	#else
		1085	return getuid () != geteuid ()
		1086	|| getgid () != getegid ();
		1087	#endif
		1088	}
		1089
		1090	unsigned int
		1091	ev_supported_backends (void)
		1092	{
		1093	unsigned int flags = 0;
		1094
		1095	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1096	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1097	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1098	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1099	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1100
		1101	return flags;
		1102	}
		1103
		1104	unsigned int
		1105	ev_recommended_backends (void)
		1106	{
		1107	unsigned int flags = ev_supported_backends ();
		1108
		1109	#ifndef __NetBSD__
		1110	/* kqueue is borked on everything but netbsd apparently */
		1111	/* it usually doesn't work correctly on anything but sockets and pipes */
		1112	flags &= ~EVBACKEND_KQUEUE;
		1113	#endif
		1114	#ifdef __APPLE__
		1115	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1116	flags &= ~EVBACKEND_POLL;
		1117	#endif
		1118
		1119	return flags;
		1120	}
		1121
		1122	unsigned int
		1123	ev_embeddable_backends (void)
		1124	{
		1125	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1126
		1127	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1128	/* please fix it and tell me how to detect the fix */
		1129	flags &= ~EVBACKEND_EPOLL;
		1130
		1131	return flags;
		1132	}
		1133
		1134	unsigned int
		1135	ev_backend (EV_P)
		1136	{
		1137	return backend;
		1138	}
		1139
		1140	unsigned int
		1141	ev_loop_count (EV_P)
		1142	{
		1143	return loop_count;
		1144	}
		1145
		1146	void
		1147	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1148	{
		1149	io_blocktime = interval;
		1150	}
		1151
		1152	void
		1153	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1154	{
		1155	timeout_blocktime = interval;
		1156	}
		1157
		1158	static void noinline
		1159	loop_init (EV_P_ unsigned int flags)
		1160	{
		1161	if (!backend)
		1162	{
		1163	#if EV_USE_MONOTONIC
247	{	1164	{
		1165	struct timespec ts;
		1166	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1167	have_monotonic = 1;
		1168	}
		1169	#endif
		1170
		1171	ev_rt_now = ev_time ();
		1172	mn_now = get_clock ();
		1173	now_floor = mn_now;
		1174	rtmn_diff = ev_rt_now - mn_now;
		1175
		1176	io_blocktime = 0.;
		1177	timeout_blocktime = 0.;
		1178	backend = 0;
		1179	backend_fd = -1;
		1180	gotasync = 0;
		1181	#if EV_USE_INOTIFY
		1182	fs_fd = -2;
		1183	#endif
		1184
		1185	/* pid check not overridable via env */
		1186	#ifndef _WIN32
		1187	if (flags & EVFLAG_FORKCHECK)
		1188	curpid = getpid ();
		1189	#endif
		1190
		1191	if (!(flags & EVFLAG_NOENV)
		1192	&& !enable_secure ()
		1193	&& getenv ("LIBEV_FLAGS"))
		1194	flags = atoi (getenv ("LIBEV_FLAGS"));
		1195
		1196	if (!(flags & 0x0000ffffU))
		1197	flags |= ev_recommended_backends ();
		1198
		1199	#if EV_USE_PORT
		1200	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1201	#endif
		1202	#if EV_USE_KQUEUE
		1203	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1204	#endif
		1205	#if EV_USE_EPOLL
		1206	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1207	#endif
		1208	#if EV_USE_POLL
		1209	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1210	#endif
		1211	#if EV_USE_SELECT
		1212	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1213	#endif
		1214
		1215	ev_init (&pipeev, pipecb);
		1216	ev_set_priority (&pipeev, EV_MAXPRI);
		1217	}
		1218	}
		1219
		1220	static void noinline
		1221	loop_destroy (EV_P)
		1222	{
		1223	int i;
		1224
		1225	if (ev_is_active (&pipeev))
		1226	{
		1227	ev_ref (EV_A); /* signal watcher */
		1228	ev_io_stop (EV_A_ &pipeev);
		1229
		1230	#if EV_USE_EVENTFD
		1231	if (evfd >= 0)
		1232	close (evfd);
		1233	#endif
		1234
		1235	if (evpipe [0] >= 0)
		1236	{
		1237	close (evpipe [0]);
		1238	close (evpipe [1]);
		1239	}
		1240	}
		1241
		1242	#if EV_USE_INOTIFY
		1243	if (fs_fd >= 0)
		1244	close (fs_fd);
		1245	#endif
		1246
		1247	if (backend_fd >= 0)
		1248	close (backend_fd);
		1249
		1250	#if EV_USE_PORT
		1251	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1252	#endif
		1253	#if EV_USE_KQUEUE
		1254	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1255	#endif
		1256	#if EV_USE_EPOLL
		1257	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1258	#endif
		1259	#if EV_USE_POLL
		1260	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1261	#endif
		1262	#if EV_USE_SELECT
		1263	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1264	#endif
		1265
		1266	for (i = NUMPRI; i--; )
		1267	{
		1268	array_free (pending, [i]);
		1269	#if EV_IDLE_ENABLE
		1270	array_free (idle, [i]);
		1271	#endif
		1272	}
		1273
		1274	ev_free (anfds); anfdmax = 0;
		1275
		1276	/* have to use the microsoft-never-gets-it-right macro */
		1277	array_free (fdchange, EMPTY);
		1278	array_free (timer, EMPTY);
		1279	#if EV_PERIODIC_ENABLE
		1280	array_free (periodic, EMPTY);
		1281	#endif
		1282	#if EV_FORK_ENABLE
		1283	array_free (fork, EMPTY);
		1284	#endif
		1285	array_free (prepare, EMPTY);
		1286	array_free (check, EMPTY);
		1287	#if EV_ASYNC_ENABLE
		1288	array_free (async, EMPTY);
		1289	#endif
		1290
		1291	backend = 0;
		1292	}
		1293
		1294	#if EV_USE_INOTIFY
		1295	void inline_size infy_fork (EV_P);
		1296	#endif
		1297
		1298	void inline_size
		1299	loop_fork (EV_P)
		1300	{
		1301	#if EV_USE_PORT
		1302	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1303	#endif
		1304	#if EV_USE_KQUEUE
		1305	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1306	#endif
		1307	#if EV_USE_EPOLL
		1308	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1309	#endif
		1310	#if EV_USE_INOTIFY
		1311	infy_fork (EV_A);
		1312	#endif
		1313
		1314	if (ev_is_active (&pipeev))
		1315	{
		1316	/* this "locks" the handlers against writing to the pipe */
		1317	/* while we modify the fd vars */
248	gotsig = 1;	1318	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	1319	#if EV_ASYNC_ENABLE
		1320	gotasync = 1;
		1321	#endif
		1322
		1323	ev_ref (EV_A);
		1324	ev_io_stop (EV_A_ &pipeev);
		1325
		1326	#if EV_USE_EVENTFD
		1327	if (evfd >= 0)
		1328	close (evfd);
		1329	#endif
		1330
		1331	if (evpipe [0] >= 0)
		1332	{
		1333	close (evpipe [0]);
		1334	close (evpipe [1]);
		1335	}
		1336
		1337	evpipe_init (EV_A);
		1338	/* now iterate over everything, in case we missed something */
		1339	pipecb (EV_A_ &pipeev, EV_READ);
		1340	}
		1341
		1342	postfork = 0;
		1343	}
		1344
		1345	#if EV_MULTIPLICITY
		1346	struct ev_loop *
		1347	ev_loop_new (unsigned int flags)
		1348	{
		1349	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1350
		1351	memset (loop, 0, sizeof (struct ev_loop));
		1352
		1353	loop_init (EV_A_ flags);
		1354
		1355	if (ev_backend (EV_A))
		1356	return loop;
		1357
		1358	return 0;
		1359	}
		1360
		1361	void
		1362	ev_loop_destroy (EV_P)
		1363	{
		1364	loop_destroy (EV_A);
		1365	ev_free (loop);
		1366	}
		1367
		1368	void
		1369	ev_loop_fork (EV_P)
		1370	{
		1371	postfork = 1; /* must be in line with ev_default_fork */
		1372	}
		1373
		1374	#endif
		1375
		1376	#if EV_MULTIPLICITY
		1377	struct ev_loop *
		1378	ev_default_loop_init (unsigned int flags)
		1379	#else
		1380	int
		1381	ev_default_loop (unsigned int flags)
		1382	#endif
		1383	{
		1384	if (!ev_default_loop_ptr)
250	}	1385	{
251	}	1386	#if EV_MULTIPLICITY
		1387	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1388	#else
		1389	ev_default_loop_ptr = 1;
		1390	#endif
252		1391
253	static void	1392	loop_init (EV_A_ flags);
254	sigcb (struct ev_io *iow, int revents)	1393
		1394	if (ev_backend (EV_A))
		1395	{
		1396	#ifndef _WIN32
		1397	ev_signal_init (&childev, childcb, SIGCHLD);
		1398	ev_set_priority (&childev, EV_MAXPRI);
		1399	ev_signal_start (EV_A_ &childev);
		1400	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1401	#endif
		1402	}
		1403	else
		1404	ev_default_loop_ptr = 0;
		1405	}
		1406
		1407	return ev_default_loop_ptr;
		1408	}
		1409
		1410	void
		1411	ev_default_destroy (void)
255	{	1412	{
256	struct ev_signal *w;	1413	#if EV_MULTIPLICITY
		1414	struct ev_loop *loop = ev_default_loop_ptr;
		1415	#endif
		1416
		1417	#ifndef _WIN32
		1418	ev_ref (EV_A); /* child watcher */
		1419	ev_signal_stop (EV_A_ &childev);
		1420	#endif
		1421
		1422	loop_destroy (EV_A);
		1423	}
		1424
		1425	void
		1426	ev_default_fork (void)
		1427	{
		1428	#if EV_MULTIPLICITY
		1429	struct ev_loop *loop = ev_default_loop_ptr;
		1430	#endif
		1431
		1432	if (backend)
		1433	postfork = 1; /* must be in line with ev_loop_fork */
		1434	}
		1435
		1436	/*****************************************************************************/
		1437
		1438	void
		1439	ev_invoke (EV_P_ void *w, int revents)
		1440	{
		1441	EV_CB_INVOKE ((W)w, revents);
		1442	}
		1443
		1444	void inline_speed
		1445	call_pending (EV_P)
		1446	{
257	int sig;	1447	int pri;
258		1448
259	gotsig = 0;	1449	for (pri = NUMPRI; pri--; )
260	read (sigpipe [0], &revents, 1);	1450	while (pendingcnt [pri])
261
262	for (sig = signalmax; sig--; )
263	if (signals [sig].gotsig)
264	{	1451	{
265	signals [sig].gotsig = 0;	1452	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
266		1453
267	for (w = signals [sig].head; w; w = w->next)	1454	if (expect_true (p->w))
268	event ((W)w, EV_SIGNAL);	1455	{
		1456	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1457
		1458	p->w->pending = 0;
		1459	EV_CB_INVOKE (p->w, p->events);
		1460	}
269	}	1461	}
270	}	1462	}
271		1463
272	static void	1464	void inline_size
273	siginit (void)	1465	timers_reify (EV_P)
274	{	1466	{
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277
278	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
281
282	evio_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);
284	}
285
286	/*****************************************************************************/
287
288	static struct ev_idle **idles;
289	static int idlemax, idlecnt;
290
291	static struct ev_check **checks;
292	static int checkmax, checkcnt;
293
294	/*****************************************************************************/
295
296	#if HAVE_EPOLL
297	# include "ev_epoll.c"
298	#endif
299	#if HAVE_SELECT
300	# include "ev_select.c"
301	#endif
302
303	int ev_init (int flags)
304	{
305	#if HAVE_MONOTONIC
306	{
307	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;
310	}
311	#endif
312
313	ev_now = ev_time ();
314	now = get_clock ();
315	diff = ev_now - now;
316
317	if (pipe (sigpipe))
318	return 0;
319
320	ev_method = EVMETHOD_NONE;
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)
329	{
330	evw_init (&sigev, sigcb, 0);
331	siginit ();
332	}
333
334	return ev_method;
335	}
336
337	/*****************************************************************************/
338
339	void ev_prefork (void)
340	{
341	}
342
343	void ev_postfork_parent (void)
344	{
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif
353
354	evio_stop (&sigev);
355	close (sigpipe [0]);
356	close (sigpipe [1]);
357	pipe (sigpipe);
358	siginit ();
359	}
360
361	/*****************************************************************************/
362
363	static void
364	fd_reify (void)
365	{
366	int i;
367
368	for (i = 0; i < fdchangecnt; ++i)
369	{
370	int fd = fdchanges [i];
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373
374	int wev = 0;
375
376	for (w = anfd->head; w; w = w->next)
377	wev |= w->events;
378
379	if (anfd->wev != wev)
380	{
381	method_modify (fd, anfd->wev, wev);
382	anfd->wev = wev;
383	}
384	}
385
386	fdchangecnt = 0;
387	}
388
389	static void
390	call_pending ()
391	{
392	int i;
393
394	for (i = 0; i < pendingcnt; ++i)
395	{
396	ANPENDING *p = pendings + i;
397
398	if (p->w)
399	{
400	p->w->pending = 0;
401	p->w->cb (p->w, p->events);
402	}
403	}
404
405	pendingcnt = 0;
406	}
407
408	static void
409	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)
410	{
411	while (timercnt && timers [0]->at <= now)	1467	while (timercnt && ev_at (timers [1]) <= mn_now)
412	{	1468	{
413	struct ev_timer *w = timers [0];	1469	ev_timer *w = (ev_timer *)timers [1];
		1470
		1471	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
414		1472
415	/* first reschedule or stop timer */	1473	/* first reschedule or stop timer */
416	if (w->repeat)	1474	if (w->repeat)
417	{	1475	{
418	if (w->is_abs)	1476	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
419	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
420	else
421	w->at = now + w->repeat;
422		1477
423	assert (w->at > now);	1478	ev_at (w) += w->repeat;
		1479	if (ev_at (w) < mn_now)
		1480	ev_at (w) = mn_now;
424		1481
425	downheap (timers, timercnt, 0);	1482	downheap (timers, timercnt, 1);
426	}	1483	}
427	else	1484	else
		1485	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1486
		1487	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1488	}
		1489	}
		1490
		1491	#if EV_PERIODIC_ENABLE
		1492	void inline_size
		1493	periodics_reify (EV_P)
		1494	{
		1495	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
		1496	{
		1497	ev_periodic *w = (ev_periodic *)periodics [1];
		1498
		1499	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1500
		1501	/* first reschedule or stop timer */
		1502	if (w->reschedule_cb)
428	{	1503	{
429	evtimer_stop (w); /* nonrepeating: stop timer */	1504	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
430	--timercnt; /* maybe pass by reference instead? */	1505	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1506	downheap (periodics, periodiccnt, 1);
431	}	1507	}
		1508	else if (w->interval)
		1509	{
		1510	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1511	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1512	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1513	downheap (periodics, periodiccnt, 1);
		1514	}
		1515	else
		1516	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
432		1517
433	event ((W)w, EV_TIMEOUT);	1518	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
434	}	1519	}
435	}	1520	}
436		1521
437	static void	1522	static void noinline
438	time_update ()	1523	periodics_reschedule (EV_P)
439	{	1524	{
440	int i;	1525	int i;
441	ev_now = ev_time ();
442		1526
443	if (have_monotonic)	1527	/* adjust periodics after time jump */
		1528	for (i = 0; i < periodiccnt; ++i)
		1529	{
		1530	ev_periodic *w = (ev_periodic *)periodics [i];
		1531
		1532	if (w->reschedule_cb)
		1533	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1534	else if (w->interval)
		1535	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
444	{	1536	}
445	ev_tstamp odiff = diff;
446		1537
447	/* detecting time jumps is much more difficult */	1538	/* now rebuild the heap */
448	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1539	for (i = periodiccnt >> 1; i--; )
		1540	downheap (periodics, periodiccnt, i);
		1541	}
		1542	#endif
		1543
		1544	#if EV_IDLE_ENABLE
		1545	void inline_size
		1546	idle_reify (EV_P)
		1547	{
		1548	if (expect_false (idleall))
		1549	{
		1550	int pri;
		1551
		1552	for (pri = NUMPRI; pri--; )
449	{	1553	{
		1554	if (pendingcnt [pri])
		1555	break;
		1556
		1557	if (idlecnt [pri])
		1558	{
		1559	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1560	break;
		1561	}
		1562	}
		1563	}
		1564	}
		1565	#endif
		1566
		1567	void inline_speed
		1568	time_update (EV_P_ ev_tstamp max_block)
		1569	{
		1570	int i;
		1571
		1572	#if EV_USE_MONOTONIC
		1573	if (expect_true (have_monotonic))
		1574	{
		1575	ev_tstamp odiff = rtmn_diff;
		1576
450	now = get_clock ();	1577	mn_now = get_clock ();
		1578
		1579	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1580	/* interpolate in the meantime */
		1581	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1582	{
		1583	ev_rt_now = rtmn_diff + mn_now;
		1584	return;
		1585	}
		1586
		1587	now_floor = mn_now;
		1588	ev_rt_now = ev_time ();
		1589
		1590	/* loop a few times, before making important decisions.
		1591	* on the choice of "4": one iteration isn't enough,
		1592	* in case we get preempted during the calls to
		1593	* ev_time and get_clock. a second call is almost guaranteed
		1594	* to succeed in that case, though. and looping a few more times
		1595	* doesn't hurt either as we only do this on time-jumps or
		1596	* in the unlikely event of having been preempted here.
		1597	*/
		1598	for (i = 4; --i; )
		1599	{
451	diff = ev_now - now;	1600	rtmn_diff = ev_rt_now - mn_now;
452		1601
453	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1602	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
454	return; /* all is well */	1603	return; /* all is well */
455		1604
456	ev_now = ev_time ();	1605	ev_rt_now = ev_time ();
		1606	mn_now = get_clock ();
		1607	now_floor = mn_now;
457	}	1608	}
458		1609
459	/* time jump detected, reschedule atimers */	1610	# if EV_PERIODIC_ENABLE
460	for (i = 0; i < atimercnt; ++i)	1611	periodics_reschedule (EV_A);
		1612	# endif
		1613	/* no timer adjustment, as the monotonic clock doesn't jump */
		1614	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1615	}
		1616	else
		1617	#endif
		1618	{
		1619	ev_rt_now = ev_time ();
		1620
		1621	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
461	{	1622	{
462	struct ev_timer *w = atimers [i];	1623	#if EV_PERIODIC_ENABLE
463	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1624	periodics_reschedule (EV_A);
		1625	#endif
		1626	/* adjust timers. this is easy, as the offset is the same for all of them */
		1627	for (i = 1; i <= timercnt; ++i)
		1628	ev_at (timers [i]) += ev_rt_now - mn_now;
464	}	1629	}
465	}
466	else
467	{
468	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
469	/* time jump detected, adjust rtimers */
470	for (i = 0; i < rtimercnt; ++i)
471	rtimers [i]->at += ev_now - now;
472		1630
473	now = ev_now;	1631	mn_now = ev_rt_now;
474	}
475	}
476
477	int ev_loop_done;
478
479	void ev_loop (int flags)
480	{
481	double block;
482	ev_loop_done = flags & EVLOOP_ONESHOT;
483
484	if (checkcnt)
485	{	1632	}
486	queue_events ((W *)checks, checkcnt, EV_CHECK);	1633	}
487	call_pending ();	1634
488	}	1635	void
		1636	ev_ref (EV_P)
		1637	{
		1638	++activecnt;
		1639	}
		1640
		1641	void
		1642	ev_unref (EV_P)
		1643	{
		1644	--activecnt;
		1645	}
		1646
		1647	static int loop_done;
		1648
		1649	void
		1650	ev_loop (EV_P_ int flags)
		1651	{
		1652	loop_done = EVUNLOOP_CANCEL;
		1653
		1654	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
489		1655
490	do	1656	do
491	{	1657	{
		1658	#ifndef _WIN32
		1659	if (expect_false (curpid)) /* penalise the forking check even more */
		1660	if (expect_false (getpid () != curpid))
		1661	{
		1662	curpid = getpid ();
		1663	postfork = 1;
		1664	}
		1665	#endif
		1666
		1667	#if EV_FORK_ENABLE
		1668	/* we might have forked, so queue fork handlers */
		1669	if (expect_false (postfork))
		1670	if (forkcnt)
		1671	{
		1672	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1673	call_pending (EV_A);
		1674	}
		1675	#endif
		1676
		1677	/* queue prepare watchers (and execute them) */
		1678	if (expect_false (preparecnt))
		1679	{
		1680	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1681	call_pending (EV_A);
		1682	}
		1683
		1684	if (expect_false (!activecnt))
		1685	break;
		1686
		1687	/* we might have forked, so reify kernel state if necessary */
		1688	if (expect_false (postfork))
		1689	loop_fork (EV_A);
		1690
492	/* update fd-related kernel structures */	1691	/* update fd-related kernel structures */
493	fd_reify ();	1692	fd_reify (EV_A);
494		1693
495	/* calculate blocking time */	1694	/* calculate blocking time */
496	if (flags & EVLOOP_NONBLOCK || idlecnt)	1695	{
497	block = 0.;	1696	ev_tstamp waittime = 0.;
498	else	1697	ev_tstamp sleeptime = 0.;
		1698
		1699	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
499	{	1700	{
		1701	/* update time to cancel out callback processing overhead */
		1702	time_update (EV_A_ 1e100);
		1703
500	block = MAX_BLOCKTIME;	1704	waittime = MAX_BLOCKTIME;
501		1705
502	if (rtimercnt)	1706	if (timercnt)
503	{	1707	{
504	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1708	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
505	if (block > to) block = to;	1709	if (waittime > to) waittime = to;
506	}	1710	}
507		1711
		1712	#if EV_PERIODIC_ENABLE
508	if (atimercnt)	1713	if (periodiccnt)
509	{	1714	{
510	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1715	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
511	if (block > to) block = to;	1716	if (waittime > to) waittime = to;
512	}	1717	}
		1718	#endif
513		1719
514	if (block < 0.) block = 0.;	1720	if (expect_false (waittime < timeout_blocktime))
		1721	waittime = timeout_blocktime;
		1722
		1723	sleeptime = waittime - backend_fudge;
		1724
		1725	if (expect_true (sleeptime > io_blocktime))
		1726	sleeptime = io_blocktime;
		1727
		1728	if (sleeptime)
		1729	{
		1730	ev_sleep (sleeptime);
		1731	waittime -= sleeptime;
		1732	}
515	}	1733	}
516		1734
517	method_poll (block);	1735	++loop_count;
		1736	backend_poll (EV_A_ waittime);
518		1737
519	/* update ev_now, do magic */	1738	/* update ev_rt_now, do magic */
520	time_update ();	1739	time_update (EV_A_ waittime + sleeptime);
		1740	}
521		1741
522	/* queue pending timers and reschedule them */	1742	/* queue pending timers and reschedule them */
523	/* absolute timers first */	1743	timers_reify (EV_A); /* relative timers called last */
524	timers_reify (atimers, atimercnt, ev_now);	1744	#if EV_PERIODIC_ENABLE
525	/* relative timers second */	1745	periodics_reify (EV_A); /* absolute timers called first */
526	timers_reify (rtimers, rtimercnt, now);	1746	#endif
527		1747
		1748	#if EV_IDLE_ENABLE
528	/* queue idle watchers unless io or timers are pending */	1749	/* queue idle watchers unless other events are pending */
529	if (!pendingcnt)	1750	idle_reify (EV_A);
530	queue_events ((W *)idles, idlecnt, EV_IDLE);	1751	#endif
531		1752
532	/* queue check and possibly idle watchers */	1753	/* queue check watchers, to be executed first */
		1754	if (expect_false (checkcnt))
533	queue_events ((W *)checks, checkcnt, EV_CHECK);	1755	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
534		1756
535	call_pending ();	1757	call_pending (EV_A);
536	}	1758	}
537	while (!ev_loop_done);	1759	while (expect_true (
		1760	activecnt
		1761	&& !loop_done
		1762	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1763	));
		1764
		1765	if (loop_done == EVUNLOOP_ONE)
		1766	loop_done = EVUNLOOP_CANCEL;
		1767	}
		1768
		1769	void
		1770	ev_unloop (EV_P_ int how)
		1771	{
		1772	loop_done = how;
538	}	1773	}
539		1774
540	/*****************************************************************************/	1775	/*****************************************************************************/
541		1776
542	static void	1777	void inline_size
543	wlist_add (WL *head, WL elem)	1778	wlist_add (WL *head, WL elem)
544	{	1779	{
545	elem->next = *head;	1780	elem->next = *head;
546	*head = elem;	1781	*head = elem;
547	}	1782	}
548		1783
549	static void	1784	void inline_size
550	wlist_del (WL *head, WL elem)	1785	wlist_del (WL *head, WL elem)
551	{	1786	{
552	while (*head)	1787	while (*head)
553	{	1788	{
554	if (*head == elem)	1789	if (*head == elem)
…		…
559		1794
560	head = &(*head)->next;	1795	head = &(*head)->next;
561	}	1796	}
562	}	1797	}
563		1798
564	static void	1799	void inline_speed
		1800	clear_pending (EV_P_ W w)
		1801	{
		1802	if (w->pending)
		1803	{
		1804	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1805	w->pending = 0;
		1806	}
		1807	}
		1808
		1809	int
		1810	ev_clear_pending (EV_P_ void *w)
		1811	{
		1812	W w_ = (W)w;
		1813	int pending = w_->pending;
		1814
		1815	if (expect_true (pending))
		1816	{
		1817	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1818	w_->pending = 0;
		1819	p->w = 0;
		1820	return p->events;
		1821	}
		1822	else
		1823	return 0;
		1824	}
		1825
		1826	void inline_size
		1827	pri_adjust (EV_P_ W w)
		1828	{
		1829	int pri = w->priority;
		1830	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1831	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1832	w->priority = pri;
		1833	}
		1834
		1835	void inline_speed
565	ev_start (W w, int active)	1836	ev_start (EV_P_ W w, int active)
566	{	1837	{
567	w->pending = 0;	1838	pri_adjust (EV_A_ w);
568	w->active = active;	1839	w->active = active;
		1840	ev_ref (EV_A);
569	}	1841	}
570		1842
571	static void	1843	void inline_size
572	ev_stop (W w)	1844	ev_stop (EV_P_ W w)
573	{	1845	{
574	if (w->pending)	1846	ev_unref (EV_A);
575	pendings [w->pending - 1].w = 0;
576
577	w->active = 0;	1847	w->active = 0;
578	/* nop */
579	}	1848	}
580		1849
581	/*****************************************************************************/	1850	/*****************************************************************************/
582		1851
583	void	1852	void noinline
584	evio_start (struct ev_io *w)	1853	ev_io_start (EV_P_ ev_io *w)
		1854	{
		1855	int fd = w->fd;
		1856
		1857	if (expect_false (ev_is_active (w)))
		1858	return;
		1859
		1860	assert (("ev_io_start called with negative fd", fd >= 0));
		1861
		1862	ev_start (EV_A_ (W)w, 1);
		1863	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1864	wlist_add (&anfds[fd].head, (WL)w);
		1865
		1866	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1867	w->events &= ~EV_IOFDSET;
		1868	}
		1869
		1870	void noinline
		1871	ev_io_stop (EV_P_ ev_io *w)
		1872	{
		1873	clear_pending (EV_A_ (W)w);
		1874	if (expect_false (!ev_is_active (w)))
		1875	return;
		1876
		1877	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1878
		1879	wlist_del (&anfds[w->fd].head, (WL)w);
		1880	ev_stop (EV_A_ (W)w);
		1881
		1882	fd_change (EV_A_ w->fd, 1);
		1883	}
		1884
		1885	void noinline
		1886	ev_timer_start (EV_P_ ev_timer *w)
		1887	{
		1888	if (expect_false (ev_is_active (w)))
		1889	return;
		1890
		1891	ev_at (w) += mn_now;
		1892
		1893	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1894
		1895	ev_start (EV_A_ (W)w, ++timercnt);
		1896	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
		1897	timers [timercnt] = (WT)w;
		1898	upheap (timers, timercnt);
		1899
		1900	/*assert (("internal timer heap corruption", timers [((W)w)->active] == w));*/
		1901	}
		1902
		1903	void noinline
		1904	ev_timer_stop (EV_P_ ev_timer *w)
		1905	{
		1906	clear_pending (EV_A_ (W)w);
		1907	if (expect_false (!ev_is_active (w)))
		1908	return;
		1909
		1910	assert (("internal timer heap corruption", timers [((W)w)->active] == (WT)w));
		1911
		1912	{
		1913	int active = ((W)w)->active;
		1914
		1915	if (expect_true (active < timercnt))
		1916	{
		1917	timers [active] = timers [timercnt];
		1918	adjustheap (timers, timercnt, active);
		1919	}
		1920
		1921	--timercnt;
		1922	}
		1923
		1924	ev_at (w) -= mn_now;
		1925
		1926	ev_stop (EV_A_ (W)w);
		1927	}
		1928
		1929	void noinline
		1930	ev_timer_again (EV_P_ ev_timer *w)
585	{	1931	{
586	if (ev_is_active (w))	1932	if (ev_is_active (w))
587	return;
588
589	int fd = w->fd;
590
591	ev_start ((W)w, 1);
592	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
593	wlist_add ((WL *)&anfds[fd].head, (WL)w);
594
595	++fdchangecnt;
596	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
597	fdchanges [fdchangecnt - 1] = fd;
598	}
599
600	void
601	evio_stop (struct ev_io *w)
602	{
603	if (!ev_is_active (w))
604	return;
605
606	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
607	ev_stop ((W)w);
608
609	++fdchangecnt;
610	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
611	fdchanges [fdchangecnt - 1] = w->fd;
612	}
613
614	void
615	evtimer_start (struct ev_timer *w)
616	{
617	if (ev_is_active (w))
618	return;
619
620	if (w->is_abs)
621	{	1933	{
622	/* this formula differs from the one in timer_reify becuse we do not round up */
623	if (w->repeat)	1934	if (w->repeat)
624	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1935	{
		1936	ev_at (w) = mn_now + w->repeat;
		1937	adjustheap (timers, timercnt, ((W)w)->active);
		1938	}
		1939	else
		1940	ev_timer_stop (EV_A_ w);
		1941	}
		1942	else if (w->repeat)
		1943	{
		1944	ev_at (w) = w->repeat;
		1945	ev_timer_start (EV_A_ w);
		1946	}
		1947	}
625		1948
626	ev_start ((W)w, ++atimercnt);	1949	#if EV_PERIODIC_ENABLE
627	array_needsize (atimers, atimermax, atimercnt, );	1950	void noinline
628	atimers [atimercnt - 1] = w;	1951	ev_periodic_start (EV_P_ ev_periodic *w)
629	upheap (atimers, atimercnt - 1);	1952	{
		1953	if (expect_false (ev_is_active (w)))
		1954	return;
		1955
		1956	if (w->reschedule_cb)
		1957	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1958	else if (w->interval)
		1959	{
		1960	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1961	/* this formula differs from the one in periodic_reify because we do not always round up */
		1962	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
630	}	1963	}
631	else	1964	else
632	{	1965	ev_at (w) = w->offset;
633	w->at += now;
634		1966
635	ev_start ((W)w, ++rtimercnt);	1967	ev_start (EV_A_ (W)w, ++periodiccnt);
636	array_needsize (rtimers, rtimermax, rtimercnt, );	1968	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
637	rtimers [rtimercnt - 1] = w;	1969	periodics [periodiccnt] = (WT)w;
638	upheap (rtimers, rtimercnt - 1);	1970	upheap (periodics, periodiccnt);
639	}
640		1971
		1972	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
641	}	1973	}
642		1974
643	void	1975	void noinline
644	evtimer_stop (struct ev_timer *w)	1976	ev_periodic_stop (EV_P_ ev_periodic *w)
645	{	1977	{
		1978	clear_pending (EV_A_ (W)w);
646	if (!ev_is_active (w))	1979	if (expect_false (!ev_is_active (w)))
647	return;	1980	return;
648		1981
649	if (w->is_abs)	1982	assert (("internal periodic heap corruption", periodics [((W)w)->active] == (WT)w));
		1983
650	{	1984	{
651	if (w->active < atimercnt--)	1985	int active = ((W)w)->active;
		1986
		1987	if (expect_true (active < periodiccnt))
652	{	1988	{
653	atimers [w->active - 1] = atimers [atimercnt];	1989	periodics [active] = periodics [periodiccnt];
654	downheap (atimers, atimercnt, w->active - 1);	1990	adjustheap (periodics, periodiccnt, active);
655	}	1991	}
		1992
		1993	--periodiccnt;
656	}	1994	}
657	else
658	{
659	if (w->active < rtimercnt--)
660	{
661	rtimers [w->active - 1] = rtimers [rtimercnt];
662	downheap (rtimers, rtimercnt, w->active - 1);
663	}
664	}
665		1995
666	ev_stop ((W)w);	1996	ev_stop (EV_A_ (W)w);
667	}	1997	}
668		1998
669	void	1999	void noinline
		2000	ev_periodic_again (EV_P_ ev_periodic *w)
		2001	{
		2002	/* TODO: use adjustheap and recalculation */
		2003	ev_periodic_stop (EV_A_ w);
		2004	ev_periodic_start (EV_A_ w);
		2005	}
		2006	#endif
		2007
		2008	#ifndef SA_RESTART
		2009	# define SA_RESTART 0
		2010	#endif
		2011
		2012	void noinline
670	evsignal_start (struct ev_signal *w)	2013	ev_signal_start (EV_P_ ev_signal *w)
671	{	2014	{
		2015	#if EV_MULTIPLICITY
		2016	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2017	#endif
672	if (ev_is_active (w))	2018	if (expect_false (ev_is_active (w)))
673	return;	2019	return;
674		2020
675	ev_start ((W)w, 1);	2021	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2022
		2023	evpipe_init (EV_A);
		2024
		2025	{
		2026	#ifndef _WIN32
		2027	sigset_t full, prev;
		2028	sigfillset (&full);
		2029	sigprocmask (SIG_SETMASK, &full, &prev);
		2030	#endif
		2031
676	array_needsize (signals, signalmax, w->signum, signals_init);	2032	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2033
		2034	#ifndef _WIN32
		2035	sigprocmask (SIG_SETMASK, &prev, 0);
		2036	#endif
		2037	}
		2038
		2039	ev_start (EV_A_ (W)w, 1);
677	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2040	wlist_add (&signals [w->signum - 1].head, (WL)w);
678		2041
679	if (!w->next)	2042	if (!((WL)w)->next)
680	{	2043	{
		2044	#if _WIN32
		2045	signal (w->signum, ev_sighandler);
		2046	#else
681	struct sigaction sa;	2047	struct sigaction sa;
682	sa.sa_handler = sighandler;	2048	sa.sa_handler = ev_sighandler;
683	sigfillset (&sa.sa_mask);	2049	sigfillset (&sa.sa_mask);
684	sa.sa_flags = 0;	2050	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
685	sigaction (w->signum, &sa, 0);	2051	sigaction (w->signum, &sa, 0);
		2052	#endif
686	}	2053	}
687	}	2054	}
688		2055
689	void	2056	void noinline
690	evsignal_stop (struct ev_signal *w)	2057	ev_signal_stop (EV_P_ ev_signal *w)
691	{	2058	{
		2059	clear_pending (EV_A_ (W)w);
692	if (!ev_is_active (w))	2060	if (expect_false (!ev_is_active (w)))
693	return;	2061	return;
694		2062
695	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2063	wlist_del (&signals [w->signum - 1].head, (WL)w);
696	ev_stop ((W)w);	2064	ev_stop (EV_A_ (W)w);
697		2065
698	if (!signals [w->signum - 1].head)	2066	if (!signals [w->signum - 1].head)
699	signal (w->signum, SIG_DFL);	2067	signal (w->signum, SIG_DFL);
700	}	2068	}
701		2069
702	void evidle_start (struct ev_idle *w)	2070	void
		2071	ev_child_start (EV_P_ ev_child *w)
703	{	2072	{
		2073	#if EV_MULTIPLICITY
		2074	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2075	#endif
704	if (ev_is_active (w))	2076	if (expect_false (ev_is_active (w)))
705	return;	2077	return;
706		2078
707	ev_start ((W)w, ++idlecnt);	2079	ev_start (EV_A_ (W)w, 1);
708	array_needsize (idles, idlemax, idlecnt, );	2080	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
709	idles [idlecnt - 1] = w;
710	}	2081	}
711		2082
712	void evidle_stop (struct ev_idle *w)	2083	void
		2084	ev_child_stop (EV_P_ ev_child *w)
713	{	2085	{
714	idles [w->active - 1] = idles [--idlecnt];	2086	clear_pending (EV_A_ (W)w);
		2087	if (expect_false (!ev_is_active (w)))
		2088	return;
		2089
		2090	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
715	ev_stop ((W)w);	2091	ev_stop (EV_A_ (W)w);
716	}	2092	}
717		2093
		2094	#if EV_STAT_ENABLE
		2095
		2096	# ifdef _WIN32
		2097	# undef lstat
		2098	# define lstat(a,b) _stati64 (a,b)
		2099	# endif
		2100
		2101	#define DEF_STAT_INTERVAL 5.0074891
		2102	#define MIN_STAT_INTERVAL 0.1074891
		2103
		2104	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2105
		2106	#if EV_USE_INOTIFY
		2107	# define EV_INOTIFY_BUFSIZE 8192
		2108
		2109	static void noinline
		2110	infy_add (EV_P_ ev_stat *w)
		2111	{
		2112	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);
		2113
		2114	if (w->wd < 0)
		2115	{
		2116	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2117
		2118	/* monitor some parent directory for speedup hints */
		2119	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2120	{
		2121	char path [4096];
		2122	strcpy (path, w->path);
		2123
		2124	do
		2125	{
		2126	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2127	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2128
		2129	char *pend = strrchr (path, '/');
		2130
		2131	if (!pend)
		2132	break; /* whoops, no '/', complain to your admin */
		2133
		2134	*pend = 0;
		2135	w->wd = inotify_add_watch (fs_fd, path, mask);
		2136	}
		2137	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2138	}
		2139	}
		2140	else
		2141	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2142
		2143	if (w->wd >= 0)
		2144	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2145	}
		2146
		2147	static void noinline
		2148	infy_del (EV_P_ ev_stat *w)
		2149	{
		2150	int slot;
		2151	int wd = w->wd;
		2152
		2153	if (wd < 0)
		2154	return;
		2155
		2156	w->wd = -2;
		2157	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2158	wlist_del (&fs_hash [slot].head, (WL)w);
		2159
		2160	/* remove this watcher, if others are watching it, they will rearm */
		2161	inotify_rm_watch (fs_fd, wd);
		2162	}
		2163
		2164	static void noinline
		2165	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2166	{
		2167	if (slot < 0)
		2168	/* overflow, need to check for all hahs slots */
		2169	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2170	infy_wd (EV_A_ slot, wd, ev);
		2171	else
		2172	{
		2173	WL w_;
		2174
		2175	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2176	{
		2177	ev_stat *w = (ev_stat *)w_;
		2178	w_ = w_->next; /* lets us remove this watcher and all before it */
		2179
		2180	if (w->wd == wd || wd == -1)
		2181	{
		2182	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2183	{
		2184	w->wd = -1;
		2185	infy_add (EV_A_ w); /* re-add, no matter what */
		2186	}
		2187
		2188	stat_timer_cb (EV_A_ &w->timer, 0);
		2189	}
		2190	}
		2191	}
		2192	}
		2193
		2194	static void
		2195	infy_cb (EV_P_ ev_io *w, int revents)
		2196	{
		2197	char buf [EV_INOTIFY_BUFSIZE];
		2198	struct inotify_event *ev = (struct inotify_event *)buf;
		2199	int ofs;
		2200	int len = read (fs_fd, buf, sizeof (buf));
		2201
		2202	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2203	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2204	}
		2205
		2206	void inline_size
		2207	infy_init (EV_P)
		2208	{
		2209	if (fs_fd != -2)
		2210	return;
		2211
		2212	fs_fd = inotify_init ();
		2213
		2214	if (fs_fd >= 0)
		2215	{
		2216	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2217	ev_set_priority (&fs_w, EV_MAXPRI);
		2218	ev_io_start (EV_A_ &fs_w);
		2219	}
		2220	}
		2221
		2222	void inline_size
		2223	infy_fork (EV_P)
		2224	{
		2225	int slot;
		2226
		2227	if (fs_fd < 0)
		2228	return;
		2229
		2230	close (fs_fd);
		2231	fs_fd = inotify_init ();
		2232
		2233	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2234	{
		2235	WL w_ = fs_hash [slot].head;
		2236	fs_hash [slot].head = 0;
		2237
		2238	while (w_)
		2239	{
		2240	ev_stat *w = (ev_stat *)w_;
		2241	w_ = w_->next; /* lets us add this watcher */
		2242
		2243	w->wd = -1;
		2244
		2245	if (fs_fd >= 0)
		2246	infy_add (EV_A_ w); /* re-add, no matter what */
		2247	else
		2248	ev_timer_start (EV_A_ &w->timer);
		2249	}
		2250
		2251	}
		2252	}
		2253
		2254	#endif
		2255
		2256	void
		2257	ev_stat_stat (EV_P_ ev_stat *w)
		2258	{
		2259	if (lstat (w->path, &w->attr) < 0)
		2260	w->attr.st_nlink = 0;
		2261	else if (!w->attr.st_nlink)
		2262	w->attr.st_nlink = 1;
		2263	}
		2264
		2265	static void noinline
		2266	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2267	{
		2268	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2269
		2270	/* we copy this here each the time so that */
		2271	/* prev has the old value when the callback gets invoked */
		2272	w->prev = w->attr;
		2273	ev_stat_stat (EV_A_ w);
		2274
		2275	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2276	if (
		2277	w->prev.st_dev != w->attr.st_dev
		2278	|| w->prev.st_ino != w->attr.st_ino
		2279	|| w->prev.st_mode != w->attr.st_mode
		2280	|| w->prev.st_nlink != w->attr.st_nlink
		2281	|| w->prev.st_uid != w->attr.st_uid
		2282	|| w->prev.st_gid != w->attr.st_gid
		2283	|| w->prev.st_rdev != w->attr.st_rdev
		2284	|| w->prev.st_size != w->attr.st_size
		2285	|| w->prev.st_atime != w->attr.st_atime
		2286	|| w->prev.st_mtime != w->attr.st_mtime
		2287	|| w->prev.st_ctime != w->attr.st_ctime
		2288	) {
		2289	#if EV_USE_INOTIFY
		2290	infy_del (EV_A_ w);
		2291	infy_add (EV_A_ w);
		2292	ev_stat_stat (EV_A_ w); /* avoid race... */
		2293	#endif
		2294
		2295	ev_feed_event (EV_A_ w, EV_STAT);
		2296	}
		2297	}
		2298
		2299	void
		2300	ev_stat_start (EV_P_ ev_stat *w)
		2301	{
		2302	if (expect_false (ev_is_active (w)))
		2303	return;
		2304
		2305	/* since we use memcmp, we need to clear any padding data etc. */
		2306	memset (&w->prev, 0, sizeof (ev_statdata));
		2307	memset (&w->attr, 0, sizeof (ev_statdata));
		2308
		2309	ev_stat_stat (EV_A_ w);
		2310
		2311	if (w->interval < MIN_STAT_INTERVAL)
		2312	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2313
		2314	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2315	ev_set_priority (&w->timer, ev_priority (w));
		2316
		2317	#if EV_USE_INOTIFY
		2318	infy_init (EV_A);
		2319
		2320	if (fs_fd >= 0)
		2321	infy_add (EV_A_ w);
		2322	else
		2323	#endif
		2324	ev_timer_start (EV_A_ &w->timer);
		2325
		2326	ev_start (EV_A_ (W)w, 1);
		2327	}
		2328
		2329	void
		2330	ev_stat_stop (EV_P_ ev_stat *w)
		2331	{
		2332	clear_pending (EV_A_ (W)w);
		2333	if (expect_false (!ev_is_active (w)))
		2334	return;
		2335
		2336	#if EV_USE_INOTIFY
		2337	infy_del (EV_A_ w);
		2338	#endif
		2339	ev_timer_stop (EV_A_ &w->timer);
		2340
		2341	ev_stop (EV_A_ (W)w);
		2342	}
		2343	#endif
		2344
		2345	#if EV_IDLE_ENABLE
		2346	void
		2347	ev_idle_start (EV_P_ ev_idle *w)
		2348	{
		2349	if (expect_false (ev_is_active (w)))
		2350	return;
		2351
		2352	pri_adjust (EV_A_ (W)w);
		2353
		2354	{
		2355	int active = ++idlecnt [ABSPRI (w)];
		2356
		2357	++idleall;
		2358	ev_start (EV_A_ (W)w, active);
		2359
		2360	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2361	idles [ABSPRI (w)][active - 1] = w;
		2362	}
		2363	}
		2364
		2365	void
		2366	ev_idle_stop (EV_P_ ev_idle *w)
		2367	{
		2368	clear_pending (EV_A_ (W)w);
		2369	if (expect_false (!ev_is_active (w)))
		2370	return;
		2371
		2372	{
		2373	int active = ((W)w)->active;
		2374
		2375	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2376	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2377
		2378	ev_stop (EV_A_ (W)w);
		2379	--idleall;
		2380	}
		2381	}
		2382	#endif
		2383
		2384	void
		2385	ev_prepare_start (EV_P_ ev_prepare *w)
		2386	{
		2387	if (expect_false (ev_is_active (w)))
		2388	return;
		2389
		2390	ev_start (EV_A_ (W)w, ++preparecnt);
		2391	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2392	prepares [preparecnt - 1] = w;
		2393	}
		2394
		2395	void
		2396	ev_prepare_stop (EV_P_ ev_prepare *w)
		2397	{
		2398	clear_pending (EV_A_ (W)w);
		2399	if (expect_false (!ev_is_active (w)))
		2400	return;
		2401
		2402	{
		2403	int active = ((W)w)->active;
		2404	prepares [active - 1] = prepares [--preparecnt];
		2405	((W)prepares [active - 1])->active = active;
		2406	}
		2407
		2408	ev_stop (EV_A_ (W)w);
		2409	}
		2410
		2411	void
718	void evcheck_start (struct ev_check *w)	2412	ev_check_start (EV_P_ ev_check *w)
719	{	2413	{
720	if (ev_is_active (w))	2414	if (expect_false (ev_is_active (w)))
721	return;	2415	return;
722		2416
723	ev_start ((W)w, ++checkcnt);	2417	ev_start (EV_A_ (W)w, ++checkcnt);
724	array_needsize (checks, checkmax, checkcnt, );	2418	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
725	checks [checkcnt - 1] = w;	2419	checks [checkcnt - 1] = w;
726	}	2420	}
727		2421
		2422	void
728	void evcheck_stop (struct ev_check *w)	2423	ev_check_stop (EV_P_ ev_check *w)
729	{	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;
730	checks [w->active - 1] = checks [--checkcnt];	2431	checks [active - 1] = checks [--checkcnt];
		2432	((W)checks [active - 1])->active = active;
		2433	}
		2434
731	ev_stop ((W)w);	2435	ev_stop (EV_A_ (W)w);
732	}	2436	}
		2437
		2438	#if EV_EMBED_ENABLE
		2439	void noinline
		2440	ev_embed_sweep (EV_P_ ev_embed *w)
		2441	{
		2442	ev_loop (w->other, EVLOOP_NONBLOCK);
		2443	}
		2444
		2445	static void
		2446	embed_io_cb (EV_P_ ev_io *io, int revents)
		2447	{
		2448	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2449
		2450	if (ev_cb (w))
		2451	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2452	else
		2453	ev_loop (w->other, EVLOOP_NONBLOCK);
		2454	}
		2455
		2456	static void
		2457	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2458	{
		2459	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2460
		2461	{
		2462	struct ev_loop *loop = w->other;
		2463
		2464	while (fdchangecnt)
		2465	{
		2466	fd_reify (EV_A);
		2467	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2468	}
		2469	}
		2470	}
		2471
		2472	#if 0
		2473	static void
		2474	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2475	{
		2476	ev_idle_stop (EV_A_ idle);
		2477	}
		2478	#endif
		2479
		2480	void
		2481	ev_embed_start (EV_P_ ev_embed *w)
		2482	{
		2483	if (expect_false (ev_is_active (w)))
		2484	return;
		2485
		2486	{
		2487	struct ev_loop *loop = w->other;
		2488	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2489	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2490	}
		2491
		2492	ev_set_priority (&w->io, ev_priority (w));
		2493	ev_io_start (EV_A_ &w->io);
		2494
		2495	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2496	ev_set_priority (&w->prepare, EV_MINPRI);
		2497	ev_prepare_start (EV_A_ &w->prepare);
		2498
		2499	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2500
		2501	ev_start (EV_A_ (W)w, 1);
		2502	}
		2503
		2504	void
		2505	ev_embed_stop (EV_P_ ev_embed *w)
		2506	{
		2507	clear_pending (EV_A_ (W)w);
		2508	if (expect_false (!ev_is_active (w)))
		2509	return;
		2510
		2511	ev_io_stop (EV_A_ &w->io);
		2512	ev_prepare_stop (EV_A_ &w->prepare);
		2513
		2514	ev_stop (EV_A_ (W)w);
		2515	}
		2516	#endif
		2517
		2518	#if EV_FORK_ENABLE
		2519	void
		2520	ev_fork_start (EV_P_ ev_fork *w)
		2521	{
		2522	if (expect_false (ev_is_active (w)))
		2523	return;
		2524
		2525	ev_start (EV_A_ (W)w, ++forkcnt);
		2526	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2527	forks [forkcnt - 1] = w;
		2528	}
		2529
		2530	void
		2531	ev_fork_stop (EV_P_ ev_fork *w)
		2532	{
		2533	clear_pending (EV_A_ (W)w);
		2534	if (expect_false (!ev_is_active (w)))
		2535	return;
		2536
		2537	{
		2538	int active = ((W)w)->active;
		2539	forks [active - 1] = forks [--forkcnt];
		2540	((W)forks [active - 1])->active = active;
		2541	}
		2542
		2543	ev_stop (EV_A_ (W)w);
		2544	}
		2545	#endif
		2546
		2547	#if EV_ASYNC_ENABLE
		2548	void
		2549	ev_async_start (EV_P_ ev_async *w)
		2550	{
		2551	if (expect_false (ev_is_active (w)))
		2552	return;
		2553
		2554	evpipe_init (EV_A);
		2555
		2556	ev_start (EV_A_ (W)w, ++asynccnt);
		2557	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2558	asyncs [asynccnt - 1] = w;
		2559	}
		2560
		2561	void
		2562	ev_async_stop (EV_P_ ev_async *w)
		2563	{
		2564	clear_pending (EV_A_ (W)w);
		2565	if (expect_false (!ev_is_active (w)))
		2566	return;
		2567
		2568	{
		2569	int active = ((W)w)->active;
		2570	asyncs [active - 1] = asyncs [--asynccnt];
		2571	((W)asyncs [active - 1])->active = active;
		2572	}
		2573
		2574	ev_stop (EV_A_ (W)w);
		2575	}
		2576
		2577	void
		2578	ev_async_send (EV_P_ ev_async *w)
		2579	{
		2580	w->sent = 1;
		2581	evpipe_write (EV_A_ &gotasync);
		2582	}
		2583	#endif
733		2584
734	/*****************************************************************************/	2585	/*****************************************************************************/
735		2586
736	#if 0	2587	struct ev_once
		2588	{
		2589	ev_io io;
		2590	ev_timer to;
		2591	void (*cb)(int revents, void *arg);
		2592	void *arg;
		2593	};
737		2594
738	static void	2595	static void
739	sin_cb (struct ev_io *w, int revents)	2596	once_cb (EV_P_ struct ev_once *once, int revents)
740	{	2597	{
741	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2598	void (*cb)(int revents, void *arg) = once->cb;
		2599	void *arg = once->arg;
		2600
		2601	ev_io_stop (EV_A_ &once->io);
		2602	ev_timer_stop (EV_A_ &once->to);
		2603	ev_free (once);
		2604
		2605	cb (revents, arg);
742	}	2606	}
743		2607
744	static void	2608	static void
745	ocb (struct ev_timer *w, int revents)	2609	once_cb_io (EV_P_ ev_io *w, int revents)
746	{	2610	{
747	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2611	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
748	evtimer_stop (w);
749	evtimer_start (w);
750	}	2612	}
751		2613
752	static void	2614	static void
753	scb (struct ev_signal *w, int revents)	2615	once_cb_to (EV_P_ ev_timer *w, int revents)
754	{	2616	{
755	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2617	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
756	}	2618	}
757		2619
758	static void	2620	void
759	gcb (struct ev_signal *w, int revents)	2621	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
760	{	2622	{
761	fprintf (stderr, "generic %x\n", revents);	2623	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
762	}
763		2624
764	int main (void)	2625	if (expect_false (!once))
765	{
766	struct ev_io sin;
767
768	ev_init (0);
769
770	evw_init (&sin, sin_cb, 55);
771	evio_set (&sin, 0, EV_READ);
772	evio_start (&sin);
773
774	struct ev_timer t[10000];
775
776	#if 0
777	int i;
778	for (i = 0; i < 10000; ++i)
779	{
780	struct ev_timer *w = t + i;
781	evw_init (w, ocb, i);
782	evtimer_set_abs (w, drand48 (), 0.99775533);
783	evtimer_start (w);
784	if (drand48 () < 0.5)
785	evtimer_stop (w);
786	}	2626	{
787	#endif	2627	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
788
789	struct ev_timer t1;
790	evw_init (&t1, ocb, 0);
791	evtimer_set_abs (&t1, 5, 10);
792	evtimer_start (&t1);
793
794	struct ev_signal sig;
795	evw_init (&sig, scb, 65535);
796	evsignal_set (&sig, SIGQUIT);
797	evsignal_start (&sig);
798
799	struct ev_check cw;
800	evw_init (&cw, gcb, 0);
801	evcheck_start (&cw);
802
803	struct ev_idle iw;
804	evw_init (&iw, gcb, 0);
805	evidle_start (&iw);
806
807	ev_loop (0);
808
809	return 0;	2628	return;
810	}	2629	}
811		2630
812	#endif	2631	once->cb = cb;
		2632	once->arg = arg;
813		2633
		2634	ev_init (&once->io, once_cb_io);
		2635	if (fd >= 0)
		2636	{
		2637	ev_io_set (&once->io, fd, events);
		2638	ev_io_start (EV_A_ &once->io);
		2639	}
814		2640
		2641	ev_init (&once->to, once_cb_to);
		2642	if (timeout >= 0.)
		2643	{
		2644	ev_timer_set (&once->to, timeout, 0.);
		2645	ev_timer_start (EV_A_ &once->to);
		2646	}
		2647	}
815		2648
		2649	#if EV_MULTIPLICITY
		2650	#include "ev_wrap.h"
		2651	#endif
816		2652
		2653	#ifdef __cplusplus
		2654	}
		2655	#endif
		2656

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