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Comparing libev/ev.c (file contents):
Revision 1.13 by root, Wed Oct 31 10:50:05 2007 UTC vs.
Revision 1.221 by root, Sun Apr 6 12:44:49 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	#define HAVE_EPOLL 1	146	#include <signal.h>
15		147
16	#ifndef HAVE_MONOTONIC	148	#ifdef EV_H
17	# ifdef CLOCK_MONOTONIC	149	# include EV_H
18	# define HAVE_MONOTONIC 1	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
19	# endif	163	# endif
20	#endif	164	#endif
21		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
22	#ifndef HAVE_SELECT	180	#ifndef EV_USE_SELECT
23	# 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
24	#endif	189	# endif
		190	#endif
25		191
26	#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
27	# define HAVE_EPOLL 0	196	# define EV_USE_EPOLL 0
28	#endif	197	# endif
		198	#endif
29		199
30	#ifndef HAVE_REALTIME	200	#ifndef EV_USE_KQUEUE
31	# 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
32	#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	int eventfd (unsigned int initval, int flags);
		275	#endif
		276
		277	/**/
		278
		279	/*
		280	* This is used to avoid floating point rounding problems.
		281	* It is added to ev_rt_now when scheduling periodics
		282	* to ensure progress, time-wise, even when rounding
		283	* errors are against us.
		284	* This value is good at least till the year 4000.
		285	* Better solutions welcome.
		286	*/
		287	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
33		288
34	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	289	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35	#define MAX_BLOCKTIME 60.	290	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		291	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
36		292
37	#include "ev.h"	293	#if __GNUC__ >= 4
		294	# define expect(expr,value) __builtin_expect ((expr),(value))
		295	# define noinline __attribute__ ((noinline))
		296	#else
		297	# define expect(expr,value) (expr)
		298	# define noinline
		299	# if __STDC_VERSION__ < 199901L
		300	# define inline
		301	# endif
		302	#endif
38		303
		304	#define expect_false(expr) expect ((expr) != 0, 0)
		305	#define expect_true(expr) expect ((expr) != 0, 1)
		306	#define inline_size static inline
		307
		308	#if EV_MINIMAL
		309	# define inline_speed static noinline
		310	#else
		311	# define inline_speed static inline
		312	#endif
		313
		314	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		315	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		316
		317	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		318	#define EMPTY2(a,b) /* used to suppress some warnings */
		319
39	typedef struct ev_watcher *W;	320	typedef ev_watcher *W;
40	typedef struct ev_watcher_list *WL;	321	typedef ev_watcher_list *WL;
41	typedef struct ev_watcher_time *WT;	322	typedef ev_watcher_time *WT;
42		323
43	static ev_tstamp now, diff; /* monotonic clock */	324	#if EV_USE_MONOTONIC
		325	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		326	/* giving it a reasonably high chance of working on typical architetcures */
		327	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		328	#endif
		329
		330	#ifdef _WIN32
		331	# include "ev_win32.c"
		332	#endif
		333
		334	/*****************************************************************************/
		335
		336	static void (*syserr_cb)(const char *msg);
		337
		338	void
		339	ev_set_syserr_cb (void (*cb)(const char *msg))
		340	{
		341	syserr_cb = cb;
		342	}
		343
		344	static void noinline
		345	syserr (const char *msg)
		346	{
		347	if (!msg)
		348	msg = "(libev) system error";
		349
		350	if (syserr_cb)
		351	syserr_cb (msg);
		352	else
		353	{
		354	perror (msg);
		355	abort ();
		356	}
		357	}
		358
		359	static void *(*alloc)(void *ptr, long size);
		360
		361	void
		362	ev_set_allocator (void *(*cb)(void *ptr, long size))
		363	{
		364	alloc = cb;
		365	}
		366
		367	inline_speed void *
		368	ev_realloc (void *ptr, long size)
		369	{
		370	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		371
		372	if (!ptr && size)
		373	{
		374	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		375	abort ();
		376	}
		377
		378	return ptr;
		379	}
		380
		381	#define ev_malloc(size) ev_realloc (0, (size))
		382	#define ev_free(ptr) ev_realloc ((ptr), 0)
		383
		384	/*****************************************************************************/
		385
		386	typedef struct
		387	{
		388	WL head;
		389	unsigned char events;
		390	unsigned char reify;
		391	#if EV_SELECT_IS_WINSOCKET
		392	SOCKET handle;
		393	#endif
		394	} ANFD;
		395
		396	typedef struct
		397	{
		398	W w;
		399	int events;
		400	} ANPENDING;
		401
		402	#if EV_USE_INOTIFY
		403	typedef struct
		404	{
		405	WL head;
		406	} ANFS;
		407	#endif
		408
		409	#if EV_MULTIPLICITY
		410
		411	struct ev_loop
		412	{
		413	ev_tstamp ev_rt_now;
		414	#define ev_rt_now ((loop)->ev_rt_now)
		415	#define VAR(name,decl) decl;
		416	#include "ev_vars.h"
		417	#undef VAR
		418	};
		419	#include "ev_wrap.h"
		420
		421	static struct ev_loop default_loop_struct;
		422	struct ev_loop *ev_default_loop_ptr;
		423
		424	#else
		425
44	ev_tstamp ev_now;	426	ev_tstamp ev_rt_now;
45	int ev_method;	427	#define VAR(name,decl) static decl;
		428	#include "ev_vars.h"
		429	#undef VAR
46		430
47	static int have_monotonic; /* runtime */	431	static int ev_default_loop_ptr;
48		432
49	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	433	#endif
50	static void (*method_modify)(int fd, int oev, int nev);
51	static void (*method_poll)(ev_tstamp timeout);
52		434
53	/*****************************************************************************/	435	/*****************************************************************************/
54		436
55	ev_tstamp	437	ev_tstamp
56	ev_time (void)	438	ev_time (void)
57	{	439	{
58	#if HAVE_REALTIME	440	#if EV_USE_REALTIME
59	struct timespec ts;	441	struct timespec ts;
60	clock_gettime (CLOCK_REALTIME, &ts);	442	clock_gettime (CLOCK_REALTIME, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	443	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	#else	444	#else
63	struct timeval tv;	445	struct timeval tv;
64	gettimeofday (&tv, 0);	446	gettimeofday (&tv, 0);
65	return tv.tv_sec + tv.tv_usec * 1e-6;	447	return tv.tv_sec + tv.tv_usec * 1e-6;
66	#endif	448	#endif
67	}	449	}
68		450
69	static ev_tstamp	451	ev_tstamp inline_size
70	get_clock (void)	452	get_clock (void)
71	{	453	{
72	#if HAVE_MONOTONIC	454	#if EV_USE_MONOTONIC
73	if (have_monotonic)	455	if (expect_true (have_monotonic))
74	{	456	{
75	struct timespec ts;	457	struct timespec ts;
76	clock_gettime (CLOCK_MONOTONIC, &ts);	458	clock_gettime (CLOCK_MONOTONIC, &ts);
77	return ts.tv_sec + ts.tv_nsec * 1e-9;	459	return ts.tv_sec + ts.tv_nsec * 1e-9;
78	}	460	}
79	#endif	461	#endif
80		462
81	return ev_time ();	463	return ev_time ();
82	}	464	}
83		465
84	#define array_needsize(base,cur,cnt,init) \	466	#if EV_MULTIPLICITY
85	if ((cnt) > cur) \	467	ev_tstamp
86	{ \	468	ev_now (EV_P)
87	int newcnt = cur ? cur << 1 : 16; \	469	{
88	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	470	return ev_rt_now;
89	base = realloc (base, sizeof (*base) * (newcnt)); \	471	}
90	init (base + cur, newcnt - cur); \	472	#endif
91	cur = newcnt; \	473
		474	void
		475	ev_sleep (ev_tstamp delay)
		476	{
		477	if (delay > 0.)
92	}	478	{
		479	#if EV_USE_NANOSLEEP
		480	struct timespec ts;
		481
		482	ts.tv_sec = (time_t)delay;
		483	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		484
		485	nanosleep (&ts, 0);
		486	#elif defined(_WIN32)
		487	Sleep ((unsigned long)(delay * 1e3));
		488	#else
		489	struct timeval tv;
		490
		491	tv.tv_sec = (time_t)delay;
		492	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		493
		494	select (0, 0, 0, 0, &tv);
		495	#endif
		496	}
		497	}
93		498
94	/*****************************************************************************/	499	/*****************************************************************************/
95		500
		501	int inline_size
		502	array_nextsize (int elem, int cur, int cnt)
		503	{
		504	int ncur = cur + 1;
		505
		506	do
		507	ncur <<= 1;
		508	while (cnt > ncur);
		509
		510	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		511	if (elem * ncur > 4096)
		512	{
		513	ncur *= elem;
		514	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		515	ncur = ncur - sizeof (void *) * 4;
		516	ncur /= elem;
		517	}
		518
		519	return ncur;
		520	}
		521
		522	static noinline void *
		523	array_realloc (int elem, void *base, int *cur, int cnt)
		524	{
		525	*cur = array_nextsize (elem, *cur, cnt);
		526	return ev_realloc (base, elem * *cur);
		527	}
		528
		529	#define array_needsize(type,base,cur,cnt,init) \
		530	if (expect_false ((cnt) > (cur))) \
		531	{ \
		532	int ocur_ = (cur); \
		533	(base) = (type *)array_realloc \
		534	(sizeof (type), (base), &(cur), (cnt)); \
		535	init ((base) + (ocur_), (cur) - ocur_); \
		536	}
		537
		538	#if 0
		539	#define array_slim(type,stem) \
		540	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		541	{ \
		542	stem ## max = array_roundsize (stem ## cnt >> 1); \
		543	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		544	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		545	}
		546	#endif
		547
		548	#define array_free(stem, idx) \
		549	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		550
		551	/*****************************************************************************/
		552
		553	void noinline
		554	ev_feed_event (EV_P_ void *w, int revents)
		555	{
		556	W w_ = (W)w;
		557	int pri = ABSPRI (w_);
		558
		559	if (expect_false (w_->pending))
		560	pendings [pri][w_->pending - 1].events |= revents;
		561	else
		562	{
		563	w_->pending = ++pendingcnt [pri];
		564	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		565	pendings [pri][w_->pending - 1].w = w_;
		566	pendings [pri][w_->pending - 1].events = revents;
		567	}
		568	}
		569
		570	void inline_speed
		571	queue_events (EV_P_ W *events, int eventcnt, int type)
		572	{
		573	int i;
		574
		575	for (i = 0; i < eventcnt; ++i)
		576	ev_feed_event (EV_A_ events [i], type);
		577	}
		578
		579	/*****************************************************************************/
		580
		581	void inline_size
		582	anfds_init (ANFD *base, int count)
		583	{
		584	while (count--)
		585	{
		586	base->head = 0;
		587	base->events = EV_NONE;
		588	base->reify = 0;
		589
		590	++base;
		591	}
		592	}
		593
		594	void inline_speed
		595	fd_event (EV_P_ int fd, int revents)
		596	{
		597	ANFD *anfd = anfds + fd;
		598	ev_io *w;
		599
		600	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		601	{
		602	int ev = w->events & revents;
		603
		604	if (ev)
		605	ev_feed_event (EV_A_ (W)w, ev);
		606	}
		607	}
		608
		609	void
		610	ev_feed_fd_event (EV_P_ int fd, int revents)
		611	{
		612	if (fd >= 0 && fd < anfdmax)
		613	fd_event (EV_A_ fd, revents);
		614	}
		615
		616	void inline_size
		617	fd_reify (EV_P)
		618	{
		619	int i;
		620
		621	for (i = 0; i < fdchangecnt; ++i)
		622	{
		623	int fd = fdchanges [i];
		624	ANFD *anfd = anfds + fd;
		625	ev_io *w;
		626
		627	unsigned char events = 0;
		628
		629	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		630	events |= (unsigned char)w->events;
		631
		632	#if EV_SELECT_IS_WINSOCKET
		633	if (events)
		634	{
		635	unsigned long argp;
		636	#ifdef EV_FD_TO_WIN32_HANDLE
		637	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		638	#else
		639	anfd->handle = _get_osfhandle (fd);
		640	#endif
		641	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		642	}
		643	#endif
		644
		645	{
		646	unsigned char o_events = anfd->events;
		647	unsigned char o_reify = anfd->reify;
		648
		649	anfd->reify = 0;
		650	anfd->events = events;
		651
		652	if (o_events != events || o_reify & EV_IOFDSET)
		653	backend_modify (EV_A_ fd, o_events, events);
		654	}
		655	}
		656
		657	fdchangecnt = 0;
		658	}
		659
		660	void inline_size
		661	fd_change (EV_P_ int fd, int flags)
		662	{
		663	unsigned char reify = anfds [fd].reify;
		664	anfds [fd].reify |= flags;
		665
		666	if (expect_true (!reify))
		667	{
		668	++fdchangecnt;
		669	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		670	fdchanges [fdchangecnt - 1] = fd;
		671	}
		672	}
		673
		674	void inline_speed
		675	fd_kill (EV_P_ int fd)
		676	{
		677	ev_io *w;
		678
		679	while ((w = (ev_io *)anfds [fd].head))
		680	{
		681	ev_io_stop (EV_A_ w);
		682	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		683	}
		684	}
		685
		686	int inline_size
		687	fd_valid (int fd)
		688	{
		689	#ifdef _WIN32
		690	return _get_osfhandle (fd) != -1;
		691	#else
		692	return fcntl (fd, F_GETFD) != -1;
		693	#endif
		694	}
		695
		696	/* called on EBADF to verify fds */
		697	static void noinline
		698	fd_ebadf (EV_P)
		699	{
		700	int fd;
		701
		702	for (fd = 0; fd < anfdmax; ++fd)
		703	if (anfds [fd].events)
		704	if (!fd_valid (fd) == -1 && errno == EBADF)
		705	fd_kill (EV_A_ fd);
		706	}
		707
		708	/* called on ENOMEM in select/poll to kill some fds and retry */
		709	static void noinline
		710	fd_enomem (EV_P)
		711	{
		712	int fd;
		713
		714	for (fd = anfdmax; fd--; )
		715	if (anfds [fd].events)
		716	{
		717	fd_kill (EV_A_ fd);
		718	return;
		719	}
		720	}
		721
		722	/* usually called after fork if backend needs to re-arm all fds from scratch */
		723	static void noinline
		724	fd_rearm_all (EV_P)
		725	{
		726	int fd;
		727
		728	for (fd = 0; fd < anfdmax; ++fd)
		729	if (anfds [fd].events)
		730	{
		731	anfds [fd].events = 0;
		732	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		733	}
		734	}
		735
		736	/*****************************************************************************/
		737
		738	void inline_speed
		739	upheap (WT *heap, int k)
		740	{
		741	WT w = heap [k];
		742
		743	while (k)
		744	{
		745	int p = (k - 1) >> 1;
		746
		747	if (heap [p]->at <= w->at)
		748	break;
		749
		750	heap [k] = heap [p];
		751	((W)heap [k])->active = k + 1;
		752	k = p;
		753	}
		754
		755	heap [k] = w;
		756	((W)heap [k])->active = k + 1;
		757	}
		758
		759	void inline_speed
		760	downheap (WT *heap, int N, int k)
		761	{
		762	WT w = heap [k];
		763
		764	for (;;)
		765	{
		766	int c = (k << 1) + 1;
		767
		768	if (c >= N)
		769	break;
		770
		771	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		772	? 1 : 0;
		773
		774	if (w->at <= heap [c]->at)
		775	break;
		776
		777	heap [k] = heap [c];
		778	((W)heap [k])->active = k + 1;
		779
		780	k = c;
		781	}
		782
		783	heap [k] = w;
		784	((W)heap [k])->active = k + 1;
		785	}
		786
		787	void inline_size
		788	adjustheap (WT *heap, int N, int k)
		789	{
		790	upheap (heap, k);
		791	downheap (heap, N, k);
		792	}
		793
		794	/*****************************************************************************/
		795
96	typedef struct	796	typedef struct
97	{	797	{
98	struct ev_io *head;	798	WL head;
99	unsigned char wev, rev; /* want, received event set */	799	EV_ATOMIC_T gotsig;
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void
109	anfds_init (ANFD *base, int count)
110	{
111	while (count--)
112	{
113	base->head = 0;
114	base->wev = base->rev = EV_NONE;
115	++base;
116	}
117	}
118
119	typedef struct
120	{
121	W w;
122	int events;
123	} ANPENDING;
124
125	static ANPENDING *pendings;
126	static int pendingmax, pendingcnt;
127
128	static void
129	event (W w, int events)
130	{
131	w->pending = ++pendingcnt;
132	array_needsize (pendings, pendingmax, pendingcnt, );
133	pendings [pendingcnt - 1].w = w;
134	pendings [pendingcnt - 1].events = events;
135	}
136
137	static void
138	fd_event (int fd, int events)
139	{
140	ANFD *anfd = anfds + fd;
141	struct ev_io *w;
142
143	for (w = anfd->head; w; w = w->next)
144	{
145	int ev = w->events & events;
146
147	if (ev)
148	event ((W)w, ev);
149	}
150	}
151
152	static void
153	queue_events (W *events, int eventcnt, int type)
154	{
155	int i;
156
157	for (i = 0; i < eventcnt; ++i)
158	event (events [i], type);
159	}
160
161	/*****************************************************************************/
162
163	static struct ev_timer **timers;
164	static int timermax, timercnt;
165
166	static struct ev_periodic **periodics;
167	static int periodicmax, periodiccnt;
168
169	static void
170	upheap (WT *timers, int k)
171	{
172	WT w = timers [k];
173
174	while (k && timers [k >> 1]->at > w->at)
175	{
176	timers [k] = timers [k >> 1];
177	timers [k]->active = k + 1;
178	k >>= 1;
179	}
180
181	timers [k] = w;
182	timers [k]->active = k + 1;
183
184	}
185
186	static void
187	downheap (WT *timers, int N, int k)
188	{
189	WT w = timers [k];
190
191	while (k < (N >> 1))
192	{
193	int j = k << 1;
194
195	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
196	++j;
197
198	if (w->at <= timers [j]->at)
199	break;
200
201	timers [k] = timers [j];
202	timers [k]->active = k + 1;
203	k = j;
204	}
205
206	timers [k] = w;
207	timers [k]->active = k + 1;
208	}
209
210	/*****************************************************************************/
211
212	typedef struct
213	{
214	struct ev_signal *head;
215	sig_atomic_t gotsig;
216	} ANSIG;	800	} ANSIG;
217		801
218	static ANSIG *signals;	802	static ANSIG *signals;
219	static int signalmax;	803	static int signalmax;
220		804
221	static int sigpipe [2];	805	static EV_ATOMIC_T gotsig;
222	static sig_atomic_t gotsig;
223	static struct ev_io sigev;
224		806
225	static void	807	void inline_size
226	signals_init (ANSIG *base, int count)	808	signals_init (ANSIG *base, int count)
227	{	809	{
228	while (count--)	810	while (count--)
229	{	811	{
230	base->head = 0;	812	base->head = 0;
231	base->gotsig = 0;	813	base->gotsig = 0;
		814
232	++base;	815	++base;
233	}	816	}
234	}	817	}
235		818
		819	/*****************************************************************************/
		820
		821	void inline_speed
		822	fd_intern (int fd)
		823	{
		824	#ifdef _WIN32
		825	int arg = 1;
		826	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		827	#else
		828	fcntl (fd, F_SETFD, FD_CLOEXEC);
		829	fcntl (fd, F_SETFL, O_NONBLOCK);
		830	#endif
		831	}
		832
		833	static void noinline
		834	evpipe_init (EV_P)
		835	{
		836	if (!ev_is_active (&pipeev))
		837	{
		838	#if EV_USE_EVENTFD
		839	if ((evfd = eventfd (0, 0)) >= 0)
		840	{
		841	evpipe [0] = -1;
		842	fd_intern (evfd);
		843	ev_io_set (&pipeev, evfd, EV_READ);
		844	}
		845	else
		846	#endif
		847	{
		848	while (pipe (evpipe))
		849	syserr ("(libev) error creating signal/async pipe");
		850
		851	fd_intern (evpipe [0]);
		852	fd_intern (evpipe [1]);
		853	ev_io_set (&pipeev, evpipe [0], EV_READ);
		854	}
		855
		856	ev_io_start (EV_A_ &pipeev);
		857	ev_unref (EV_A); /* watcher should not keep loop alive */
		858	}
		859	}
		860
		861	void inline_size
		862	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		863	{
		864	if (!*flag)
		865	{
		866	int old_errno = errno; /* save errno because write might clobber it */
		867
		868	*flag = 1;
		869
		870	#if EV_USE_EVENTFD
		871	if (evfd >= 0)
		872	{
		873	uint64_t counter = 1;
		874	write (evfd, &counter, sizeof (uint64_t));
		875	}
		876	else
		877	#endif
		878	write (evpipe [1], &old_errno, 1);
		879
		880	errno = old_errno;
		881	}
		882	}
		883
236	static void	884	static void
		885	pipecb (EV_P_ ev_io *iow, int revents)
		886	{
		887	#if EV_USE_EVENTFD
		888	if (evfd >= 0)
		889	{
		890	uint64_t counter = 1;
		891	read (evfd, &counter, sizeof (uint64_t));
		892	}
		893	else
		894	#endif
		895	{
		896	char dummy;
		897	read (evpipe [0], &dummy, 1);
		898	}
		899
		900	if (gotsig && ev_is_default_loop (EV_A))
		901	{
		902	int signum;
		903	gotsig = 0;
		904
		905	for (signum = signalmax; signum--; )
		906	if (signals [signum].gotsig)
		907	ev_feed_signal_event (EV_A_ signum + 1);
		908	}
		909
		910	#if EV_ASYNC_ENABLE
		911	if (gotasync)
		912	{
		913	int i;
		914	gotasync = 0;
		915
		916	for (i = asynccnt; i--; )
		917	if (asyncs [i]->sent)
		918	{
		919	asyncs [i]->sent = 0;
		920	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		921	}
		922	}
		923	#endif
		924	}
		925
		926	/*****************************************************************************/
		927
		928	static void
237	sighandler (int signum)	929	ev_sighandler (int signum)
238	{	930	{
		931	#if EV_MULTIPLICITY
		932	struct ev_loop *loop = &default_loop_struct;
		933	#endif
		934
		935	#if _WIN32
		936	signal (signum, ev_sighandler);
		937	#endif
		938
239	signals [signum - 1].gotsig = 1;	939	signals [signum - 1].gotsig = 1;
		940	evpipe_write (EV_A_ &gotsig);
		941	}
240		942
241	if (!gotsig)	943	void noinline
		944	ev_feed_signal_event (EV_P_ int signum)
		945	{
		946	WL w;
		947
		948	#if EV_MULTIPLICITY
		949	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		950	#endif
		951
		952	--signum;
		953
		954	if (signum < 0 || signum >= signalmax)
		955	return;
		956
		957	signals [signum].gotsig = 0;
		958
		959	for (w = signals [signum].head; w; w = w->next)
		960	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		961	}
		962
		963	/*****************************************************************************/
		964
		965	static WL childs [EV_PID_HASHSIZE];
		966
		967	#ifndef _WIN32
		968
		969	static ev_signal childev;
		970
		971	#ifndef WIFCONTINUED
		972	# define WIFCONTINUED(status) 0
		973	#endif
		974
		975	void inline_speed
		976	child_reap (EV_P_ int chain, int pid, int status)
		977	{
		978	ev_child *w;
		979	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		980
		981	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		982	{
		983	if ((w->pid == pid || !w->pid)
		984	&& (!traced || (w->flags & 1)))
		985	{
		986	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		987	w->rpid = pid;
		988	w->rstatus = status;
		989	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		990	}
		991	}
		992	}
		993
		994	#ifndef WCONTINUED
		995	# define WCONTINUED 0
		996	#endif
		997
		998	static void
		999	childcb (EV_P_ ev_signal *sw, int revents)
		1000	{
		1001	int pid, status;
		1002
		1003	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1004	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		1005	if (!WCONTINUED
		1006	|| errno != EINVAL
		1007	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1008	return;
		1009
		1010	/* make sure we are called again until all children have been reaped */
		1011	/* we need to do it this way so that the callback gets called before we continue */
		1012	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1013
		1014	child_reap (EV_A_ pid, pid, status);
		1015	if (EV_PID_HASHSIZE > 1)
		1016	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1017	}
		1018
		1019	#endif
		1020
		1021	/*****************************************************************************/
		1022
		1023	#if EV_USE_PORT
		1024	# include "ev_port.c"
		1025	#endif
		1026	#if EV_USE_KQUEUE
		1027	# include "ev_kqueue.c"
		1028	#endif
		1029	#if EV_USE_EPOLL
		1030	# include "ev_epoll.c"
		1031	#endif
		1032	#if EV_USE_POLL
		1033	# include "ev_poll.c"
		1034	#endif
		1035	#if EV_USE_SELECT
		1036	# include "ev_select.c"
		1037	#endif
		1038
		1039	int
		1040	ev_version_major (void)
		1041	{
		1042	return EV_VERSION_MAJOR;
		1043	}
		1044
		1045	int
		1046	ev_version_minor (void)
		1047	{
		1048	return EV_VERSION_MINOR;
		1049	}
		1050
		1051	/* return true if we are running with elevated privileges and should ignore env variables */
		1052	int inline_size
		1053	enable_secure (void)
		1054	{
		1055	#ifdef _WIN32
		1056	return 0;
		1057	#else
		1058	return getuid () != geteuid ()
		1059	|| getgid () != getegid ();
		1060	#endif
		1061	}
		1062
		1063	unsigned int
		1064	ev_supported_backends (void)
		1065	{
		1066	unsigned int flags = 0;
		1067
		1068	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1069	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1070	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1071	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1072	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1073
		1074	return flags;
		1075	}
		1076
		1077	unsigned int
		1078	ev_recommended_backends (void)
		1079	{
		1080	unsigned int flags = ev_supported_backends ();
		1081
		1082	#ifndef __NetBSD__
		1083	/* kqueue is borked on everything but netbsd apparently */
		1084	/* it usually doesn't work correctly on anything but sockets and pipes */
		1085	flags &= ~EVBACKEND_KQUEUE;
		1086	#endif
		1087	#ifdef __APPLE__
		1088	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1089	flags &= ~EVBACKEND_POLL;
		1090	#endif
		1091
		1092	return flags;
		1093	}
		1094
		1095	unsigned int
		1096	ev_embeddable_backends (void)
		1097	{
		1098	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1099
		1100	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1101	/* please fix it and tell me how to detect the fix */
		1102	flags &= ~EVBACKEND_EPOLL;
		1103
		1104	return flags;
		1105	}
		1106
		1107	unsigned int
		1108	ev_backend (EV_P)
		1109	{
		1110	return backend;
		1111	}
		1112
		1113	unsigned int
		1114	ev_loop_count (EV_P)
		1115	{
		1116	return loop_count;
		1117	}
		1118
		1119	void
		1120	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1121	{
		1122	io_blocktime = interval;
		1123	}
		1124
		1125	void
		1126	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1127	{
		1128	timeout_blocktime = interval;
		1129	}
		1130
		1131	static void noinline
		1132	loop_init (EV_P_ unsigned int flags)
		1133	{
		1134	if (!backend)
		1135	{
		1136	#if EV_USE_MONOTONIC
242	{	1137	{
		1138	struct timespec ts;
		1139	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1140	have_monotonic = 1;
		1141	}
		1142	#endif
		1143
		1144	ev_rt_now = ev_time ();
		1145	mn_now = get_clock ();
		1146	now_floor = mn_now;
		1147	rtmn_diff = ev_rt_now - mn_now;
		1148
		1149	io_blocktime = 0.;
		1150	timeout_blocktime = 0.;
		1151	backend = 0;
		1152	backend_fd = -1;
		1153	gotasync = 0;
		1154	#if EV_USE_INOTIFY
		1155	fs_fd = -2;
		1156	#endif
		1157
		1158	/* pid check not overridable via env */
		1159	#ifndef _WIN32
		1160	if (flags & EVFLAG_FORKCHECK)
		1161	curpid = getpid ();
		1162	#endif
		1163
		1164	if (!(flags & EVFLAG_NOENV)
		1165	&& !enable_secure ()
		1166	&& getenv ("LIBEV_FLAGS"))
		1167	flags = atoi (getenv ("LIBEV_FLAGS"));
		1168
		1169	if (!(flags & 0x0000ffffUL))
		1170	flags |= ev_recommended_backends ();
		1171
		1172	#if EV_USE_PORT
		1173	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1174	#endif
		1175	#if EV_USE_KQUEUE
		1176	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1177	#endif
		1178	#if EV_USE_EPOLL
		1179	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1180	#endif
		1181	#if EV_USE_POLL
		1182	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1183	#endif
		1184	#if EV_USE_SELECT
		1185	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1186	#endif
		1187
		1188	ev_init (&pipeev, pipecb);
		1189	ev_set_priority (&pipeev, EV_MAXPRI);
		1190	}
		1191	}
		1192
		1193	static void noinline
		1194	loop_destroy (EV_P)
		1195	{
		1196	int i;
		1197
		1198	if (ev_is_active (&pipeev))
		1199	{
		1200	ev_ref (EV_A); /* signal watcher */
		1201	ev_io_stop (EV_A_ &pipeev);
		1202
		1203	#if EV_USE_EVENTFD
		1204	if (evfd >= 0)
		1205	close (evfd);
		1206	#endif
		1207
		1208	if (evpipe [0] >= 0)
		1209	{
		1210	close (evpipe [0]);
		1211	close (evpipe [1]);
		1212	}
		1213	}
		1214
		1215	#if EV_USE_INOTIFY
		1216	if (fs_fd >= 0)
		1217	close (fs_fd);
		1218	#endif
		1219
		1220	if (backend_fd >= 0)
		1221	close (backend_fd);
		1222
		1223	#if EV_USE_PORT
		1224	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1225	#endif
		1226	#if EV_USE_KQUEUE
		1227	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1228	#endif
		1229	#if EV_USE_EPOLL
		1230	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1231	#endif
		1232	#if EV_USE_POLL
		1233	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1234	#endif
		1235	#if EV_USE_SELECT
		1236	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1237	#endif
		1238
		1239	for (i = NUMPRI; i--; )
		1240	{
		1241	array_free (pending, [i]);
		1242	#if EV_IDLE_ENABLE
		1243	array_free (idle, [i]);
		1244	#endif
		1245	}
		1246
		1247	ev_free (anfds); anfdmax = 0;
		1248
		1249	/* have to use the microsoft-never-gets-it-right macro */
		1250	array_free (fdchange, EMPTY);
		1251	array_free (timer, EMPTY);
		1252	#if EV_PERIODIC_ENABLE
		1253	array_free (periodic, EMPTY);
		1254	#endif
		1255	#if EV_FORK_ENABLE
		1256	array_free (fork, EMPTY);
		1257	#endif
		1258	array_free (prepare, EMPTY);
		1259	array_free (check, EMPTY);
		1260	#if EV_ASYNC_ENABLE
		1261	array_free (async, EMPTY);
		1262	#endif
		1263
		1264	backend = 0;
		1265	}
		1266
		1267	void inline_size infy_fork (EV_P);
		1268
		1269	void inline_size
		1270	loop_fork (EV_P)
		1271	{
		1272	#if EV_USE_PORT
		1273	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1274	#endif
		1275	#if EV_USE_KQUEUE
		1276	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1277	#endif
		1278	#if EV_USE_EPOLL
		1279	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1280	#endif
		1281	#if EV_USE_INOTIFY
		1282	infy_fork (EV_A);
		1283	#endif
		1284
		1285	if (ev_is_active (&pipeev))
		1286	{
		1287	/* this "locks" the handlers against writing to the pipe */
		1288	/* while we modify the fd vars */
243	gotsig = 1;	1289	gotsig = 1;
244	write (sigpipe [1], &gotsig, 1);	1290	#if EV_ASYNC_ENABLE
		1291	gotasync = 1;
		1292	#endif
		1293
		1294	ev_ref (EV_A);
		1295	ev_io_stop (EV_A_ &pipeev);
		1296
		1297	#if EV_USE_EVENTFD
		1298	if (evfd >= 0)
		1299	close (evfd);
		1300	#endif
		1301
		1302	if (evpipe [0] >= 0)
		1303	{
		1304	close (evpipe [0]);
		1305	close (evpipe [1]);
		1306	}
		1307
		1308	evpipe_init (EV_A);
		1309	/* now iterate over everything, in case we missed something */
		1310	pipecb (EV_A_ &pipeev, EV_READ);
		1311	}
		1312
		1313	postfork = 0;
		1314	}
		1315
		1316	#if EV_MULTIPLICITY
		1317	struct ev_loop *
		1318	ev_loop_new (unsigned int flags)
		1319	{
		1320	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1321
		1322	memset (loop, 0, sizeof (struct ev_loop));
		1323
		1324	loop_init (EV_A_ flags);
		1325
		1326	if (ev_backend (EV_A))
		1327	return loop;
		1328
		1329	return 0;
		1330	}
		1331
		1332	void
		1333	ev_loop_destroy (EV_P)
		1334	{
		1335	loop_destroy (EV_A);
		1336	ev_free (loop);
		1337	}
		1338
		1339	void
		1340	ev_loop_fork (EV_P)
		1341	{
		1342	postfork = 1; /* must be in line with ev_default_fork */
		1343	}
		1344
		1345	#endif
		1346
		1347	#if EV_MULTIPLICITY
		1348	struct ev_loop *
		1349	ev_default_loop_init (unsigned int flags)
		1350	#else
		1351	int
		1352	ev_default_loop (unsigned int flags)
		1353	#endif
		1354	{
		1355	if (!ev_default_loop_ptr)
245	}	1356	{
246	}	1357	#if EV_MULTIPLICITY
		1358	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1359	#else
		1360	ev_default_loop_ptr = 1;
		1361	#endif
247		1362
248	static void	1363	loop_init (EV_A_ flags);
249	sigcb (struct ev_io *iow, int revents)	1364
		1365	if (ev_backend (EV_A))
		1366	{
		1367	#ifndef _WIN32
		1368	ev_signal_init (&childev, childcb, SIGCHLD);
		1369	ev_set_priority (&childev, EV_MAXPRI);
		1370	ev_signal_start (EV_A_ &childev);
		1371	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1372	#endif
		1373	}
		1374	else
		1375	ev_default_loop_ptr = 0;
		1376	}
		1377
		1378	return ev_default_loop_ptr;
		1379	}
		1380
		1381	void
		1382	ev_default_destroy (void)
250	{	1383	{
251	struct ev_signal *w;	1384	#if EV_MULTIPLICITY
		1385	struct ev_loop *loop = ev_default_loop_ptr;
		1386	#endif
		1387
		1388	#ifndef _WIN32
		1389	ev_ref (EV_A); /* child watcher */
		1390	ev_signal_stop (EV_A_ &childev);
		1391	#endif
		1392
		1393	loop_destroy (EV_A);
		1394	}
		1395
		1396	void
		1397	ev_default_fork (void)
		1398	{
		1399	#if EV_MULTIPLICITY
		1400	struct ev_loop *loop = ev_default_loop_ptr;
		1401	#endif
		1402
		1403	if (backend)
		1404	postfork = 1; /* must be in line with ev_loop_fork */
		1405	}
		1406
		1407	/*****************************************************************************/
		1408
		1409	void
		1410	ev_invoke (EV_P_ void *w, int revents)
		1411	{
		1412	EV_CB_INVOKE ((W)w, revents);
		1413	}
		1414
		1415	void inline_speed
		1416	call_pending (EV_P)
		1417	{
252	int sig;	1418	int pri;
253		1419
254	gotsig = 0;	1420	for (pri = NUMPRI; pri--; )
255	read (sigpipe [0], &revents, 1);	1421	while (pendingcnt [pri])
256
257	for (sig = signalmax; sig--; )
258	if (signals [sig].gotsig)
259	{	1422	{
260	signals [sig].gotsig = 0;	1423	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
261		1424
262	for (w = signals [sig].head; w; w = w->next)	1425	if (expect_true (p->w))
263	event ((W)w, EV_SIGNAL);	1426	{
		1427	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1428
		1429	p->w->pending = 0;
		1430	EV_CB_INVOKE (p->w, p->events);
		1431	}
264	}	1432	}
265	}	1433	}
266		1434
267	static void	1435	void inline_size
268	siginit (void)
269	{
270	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
271	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272
273	/* rather than sort out wether we really need nb, set it */
274	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
275	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
276
277	evio_set (&sigev, sigpipe [0], EV_READ);
278	evio_start (&sigev);
279	}
280
281	/*****************************************************************************/
282
283	static struct ev_idle **idles;
284	static int idlemax, idlecnt;
285
286	static struct ev_check **checks;
287	static int checkmax, checkcnt;
288
289	/*****************************************************************************/
290
291	#if HAVE_EPOLL
292	# include "ev_epoll.c"
293	#endif
294	#if HAVE_SELECT
295	# include "ev_select.c"
296	#endif
297
298	int ev_init (int flags)
299	{
300	#if HAVE_MONOTONIC
301	{
302	struct timespec ts;
303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304	have_monotonic = 1;
305	}
306	#endif
307
308	ev_now = ev_time ();
309	now = get_clock ();
310	diff = ev_now - now;
311
312	if (pipe (sigpipe))
313	return 0;
314
315	ev_method = EVMETHOD_NONE;
316	#if HAVE_EPOLL
317	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
318	#endif
319	#if HAVE_SELECT
320	if (ev_method == EVMETHOD_NONE) select_init (flags);
321	#endif
322
323	if (ev_method)
324	{
325	evw_init (&sigev, sigcb);
326	siginit ();
327	}
328
329	return ev_method;
330	}
331
332	/*****************************************************************************/
333
334	void ev_prefork (void)
335	{
336	/* nop */
337	}
338
339	void ev_postfork_parent (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_child (void)
345	{
346	#if HAVE_EPOLL
347	if (ev_method == EVMETHOD_EPOLL)
348	epoll_postfork_child ();
349	#endif
350
351	evio_stop (&sigev);
352	close (sigpipe [0]);
353	close (sigpipe [1]);
354	pipe (sigpipe);
355	siginit ();
356	}
357
358	/*****************************************************************************/
359
360	static void
361	fd_reify (void)
362	{
363	int i;
364
365	for (i = 0; i < fdchangecnt; ++i)
366	{
367	int fd = fdchanges [i];
368	ANFD *anfd = anfds + fd;
369	struct ev_io *w;
370
371	int wev = 0;
372
373	for (w = anfd->head; w; w = w->next)
374	wev |= w->events;
375
376	if (anfd->wev != wev)
377	{
378	method_modify (fd, anfd->wev, wev);
379	anfd->wev = wev;
380	}
381	}
382
383	fdchangecnt = 0;
384	}
385
386	static void
387	call_pending ()
388	{
389	int i;
390
391	for (i = 0; i < pendingcnt; ++i)
392	{
393	ANPENDING *p = pendings + i;
394
395	if (p->w)
396	{
397	p->w->pending = 0;
398	p->w->cb (p->w, p->events);
399	}
400	}
401
402	pendingcnt = 0;
403	}
404
405	static void
406	timers_reify ()	1436	timers_reify (EV_P)
407	{	1437	{
408	while (timercnt && timers [0]->at <= now)	1438	while (timercnt && ((WT)timers [0])->at <= mn_now)
409	{	1439	{
410	struct ev_timer *w = timers [0];	1440	ev_timer *w = (ev_timer *)timers [0];
		1441
		1442	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
411		1443
412	/* first reschedule or stop timer */	1444	/* first reschedule or stop timer */
413	if (w->repeat)	1445	if (w->repeat)
414	{	1446	{
		1447	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1448
415	w->at = now + w->repeat;	1449	((WT)w)->at += w->repeat;
416	assert (("timer timeout in the past, negative repeat?", w->at > now));	1450	if (((WT)w)->at < mn_now)
		1451	((WT)w)->at = mn_now;
		1452
417	downheap ((WT *)timers, timercnt, 0);	1453	downheap (timers, timercnt, 0);
418	}	1454	}
419	else	1455	else
420	evtimer_stop (w); /* nonrepeating: stop timer */	1456	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421		1457
422	event ((W)w, EV_TIMEOUT);	1458	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
423	}	1459	}
424	}	1460	}
425		1461
426	static void	1462	#if EV_PERIODIC_ENABLE
		1463	void inline_size
427	periodics_reify ()	1464	periodics_reify (EV_P)
428	{	1465	{
429	while (periodiccnt && periodics [0]->at <= ev_now)	1466	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
430	{	1467	{
431	struct ev_periodic *w = periodics [0];	1468	ev_periodic *w = (ev_periodic *)periodics [0];
		1469
		1470	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
432		1471
433	/* first reschedule or stop timer */	1472	/* first reschedule or stop timer */
434	if (w->interval)	1473	if (w->reschedule_cb)
435	{	1474	{
436	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1475	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
437	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1476	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
438	downheap ((WT *)periodics, periodiccnt, 0);	1477	downheap (periodics, periodiccnt, 0);
		1478	}
		1479	else if (w->interval)
		1480	{
		1481	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1482	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1483	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1484	downheap (periodics, periodiccnt, 0);
439	}	1485	}
440	else	1486	else
441	evperiodic_stop (w); /* nonrepeating: stop timer */	1487	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442		1488
443	event ((W)w, EV_TIMEOUT);	1489	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
444	}	1490	}
445	}	1491	}
446		1492
447	static void	1493	static void noinline
448	periodics_reschedule (ev_tstamp diff)	1494	periodics_reschedule (EV_P)
449	{	1495	{
450	int i;	1496	int i;
451		1497
452	/* adjust periodics after time jump */	1498	/* adjust periodics after time jump */
453	for (i = 0; i < periodiccnt; ++i)	1499	for (i = 0; i < periodiccnt; ++i)
454	{	1500	{
455	struct ev_periodic *w = periodics [i];	1501	ev_periodic *w = (ev_periodic *)periodics [i];
456		1502
		1503	if (w->reschedule_cb)
		1504	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
457	if (w->interval)	1505	else if (w->interval)
		1506	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1507	}
		1508
		1509	/* now rebuild the heap */
		1510	for (i = periodiccnt >> 1; i--; )
		1511	downheap (periodics, periodiccnt, i);
		1512	}
		1513	#endif
		1514
		1515	#if EV_IDLE_ENABLE
		1516	void inline_size
		1517	idle_reify (EV_P)
		1518	{
		1519	if (expect_false (idleall))
		1520	{
		1521	int pri;
		1522
		1523	for (pri = NUMPRI; pri--; )
458	{	1524	{
459	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1525	if (pendingcnt [pri])
		1526	break;
460		1527
461	if (fabs (diff) >= 1e-4)	1528	if (idlecnt [pri])
462	{	1529	{
463	evperiodic_stop (w);	1530	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
464	evperiodic_start (w);	1531	break;
465
466	i = 0; /* restart loop, inefficient, but time jumps should be rare */
467	}	1532	}
468	}	1533	}
469	}	1534	}
470	}	1535	}
		1536	#endif
471		1537
472	static void	1538	void inline_speed
473	time_update ()	1539	time_update (EV_P_ ev_tstamp max_block)
474	{	1540	{
475	int i;	1541	int i;
476		1542
477	ev_now = ev_time ();	1543	#if EV_USE_MONOTONIC
478
479	if (have_monotonic)	1544	if (expect_true (have_monotonic))
480	{	1545	{
481	ev_tstamp odiff = diff;	1546	ev_tstamp odiff = rtmn_diff;
482		1547
483	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1548	mn_now = get_clock ();
		1549
		1550	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1551	/* interpolate in the meantime */
		1552	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
484	{	1553	{
485	now = get_clock ();	1554	ev_rt_now = rtmn_diff + mn_now;
		1555	return;
		1556	}
		1557
		1558	now_floor = mn_now;
		1559	ev_rt_now = ev_time ();
		1560
		1561	/* loop a few times, before making important decisions.
		1562	* on the choice of "4": one iteration isn't enough,
		1563	* in case we get preempted during the calls to
		1564	* ev_time and get_clock. a second call is almost guaranteed
		1565	* to succeed in that case, though. and looping a few more times
		1566	* doesn't hurt either as we only do this on time-jumps or
		1567	* in the unlikely event of having been preempted here.
		1568	*/
		1569	for (i = 4; --i; )
		1570	{
486	diff = ev_now - now;	1571	rtmn_diff = ev_rt_now - mn_now;
487		1572
488	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1573	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
489	return; /* all is well */	1574	return; /* all is well */
490		1575
491	ev_now = ev_time ();	1576	ev_rt_now = ev_time ();
		1577	mn_now = get_clock ();
		1578	now_floor = mn_now;
492	}	1579	}
493		1580
		1581	# if EV_PERIODIC_ENABLE
494	periodics_reschedule (diff - odiff);	1582	periodics_reschedule (EV_A);
		1583	# endif
495	/* no timer adjustment, as the monotonic clock doesn't jump */	1584	/* no timer adjustment, as the monotonic clock doesn't jump */
		1585	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
496	}	1586	}
497	else	1587	else
		1588	#endif
498	{	1589	{
499	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1590	ev_rt_now = ev_time ();
		1591
		1592	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
500	{	1593	{
		1594	#if EV_PERIODIC_ENABLE
501	periodics_reschedule (ev_now - now);	1595	periodics_reschedule (EV_A);
502		1596	#endif
503	/* adjust timers. this is easy, as the offset is the same for all */	1597	/* adjust timers. this is easy, as the offset is the same for all of them */
504	for (i = 0; i < timercnt; ++i)	1598	for (i = 0; i < timercnt; ++i)
505	timers [i]->at += diff;	1599	((WT)timers [i])->at += ev_rt_now - mn_now;
506	}	1600	}
507		1601
508	now = ev_now;	1602	mn_now = ev_rt_now;
509	}
510	}
511
512	int ev_loop_done;
513
514	void ev_loop (int flags)
515	{
516	double block;
517	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
518
519	if (checkcnt)
520	{	1603	}
521	queue_events ((W *)checks, checkcnt, EV_CHECK);	1604	}
522	call_pending ();	1605
523	}	1606	void
		1607	ev_ref (EV_P)
		1608	{
		1609	++activecnt;
		1610	}
		1611
		1612	void
		1613	ev_unref (EV_P)
		1614	{
		1615	--activecnt;
		1616	}
		1617
		1618	static int loop_done;
		1619
		1620	void
		1621	ev_loop (EV_P_ int flags)
		1622	{
		1623	loop_done = EVUNLOOP_CANCEL;
		1624
		1625	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
524		1626
525	do	1627	do
526	{	1628	{
		1629	#ifndef _WIN32
		1630	if (expect_false (curpid)) /* penalise the forking check even more */
		1631	if (expect_false (getpid () != curpid))
		1632	{
		1633	curpid = getpid ();
		1634	postfork = 1;
		1635	}
		1636	#endif
		1637
		1638	#if EV_FORK_ENABLE
		1639	/* we might have forked, so queue fork handlers */
		1640	if (expect_false (postfork))
		1641	if (forkcnt)
		1642	{
		1643	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1644	call_pending (EV_A);
		1645	}
		1646	#endif
		1647
		1648	/* queue prepare watchers (and execute them) */
		1649	if (expect_false (preparecnt))
		1650	{
		1651	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1652	call_pending (EV_A);
		1653	}
		1654
		1655	if (expect_false (!activecnt))
		1656	break;
		1657
		1658	/* we might have forked, so reify kernel state if necessary */
		1659	if (expect_false (postfork))
		1660	loop_fork (EV_A);
		1661
527	/* update fd-related kernel structures */	1662	/* update fd-related kernel structures */
528	fd_reify ();	1663	fd_reify (EV_A);
529		1664
530	/* calculate blocking time */	1665	/* calculate blocking time */
		1666	{
		1667	ev_tstamp waittime = 0.;
		1668	ev_tstamp sleeptime = 0.;
531		1669
532	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1670	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
533	ev_now = ev_time ();
534
535	if (flags & EVLOOP_NONBLOCK || idlecnt)
536	block = 0.;
537	else
538	{	1671	{
		1672	/* update time to cancel out callback processing overhead */
		1673	time_update (EV_A_ 1e100);
		1674
539	block = MAX_BLOCKTIME;	1675	waittime = MAX_BLOCKTIME;
540		1676
541	if (timercnt)	1677	if (timercnt)
542	{	1678	{
543	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	1679	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
544	if (block > to) block = to;	1680	if (waittime > to) waittime = to;
545	}	1681	}
546		1682
		1683	#if EV_PERIODIC_ENABLE
547	if (periodiccnt)	1684	if (periodiccnt)
548	{	1685	{
549	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1686	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
550	if (block > to) block = to;	1687	if (waittime > to) waittime = to;
551	}	1688	}
		1689	#endif
552		1690
553	if (block < 0.) block = 0.;	1691	if (expect_false (waittime < timeout_blocktime))
		1692	waittime = timeout_blocktime;
		1693
		1694	sleeptime = waittime - backend_fudge;
		1695
		1696	if (expect_true (sleeptime > io_blocktime))
		1697	sleeptime = io_blocktime;
		1698
		1699	if (sleeptime)
		1700	{
		1701	ev_sleep (sleeptime);
		1702	waittime -= sleeptime;
		1703	}
554	}	1704	}
555		1705
556	method_poll (block);	1706	++loop_count;
		1707	backend_poll (EV_A_ waittime);
557		1708
558	/* update ev_now, do magic */	1709	/* update ev_rt_now, do magic */
559	time_update ();	1710	time_update (EV_A_ waittime + sleeptime);
		1711	}
560		1712
561	/* queue pending timers and reschedule them */	1713	/* queue pending timers and reschedule them */
		1714	timers_reify (EV_A); /* relative timers called last */
		1715	#if EV_PERIODIC_ENABLE
562	periodics_reify (); /* absolute timers first */	1716	periodics_reify (EV_A); /* absolute timers called first */
563	timers_reify (); /* relative timers second */	1717	#endif
564		1718
		1719	#if EV_IDLE_ENABLE
565	/* queue idle watchers unless io or timers are pending */	1720	/* queue idle watchers unless other events are pending */
566	if (!pendingcnt)	1721	idle_reify (EV_A);
567	queue_events ((W *)idles, idlecnt, EV_IDLE);	1722	#endif
568		1723
569	/* queue check and possibly idle watchers */	1724	/* queue check watchers, to be executed first */
		1725	if (expect_false (checkcnt))
570	queue_events ((W *)checks, checkcnt, EV_CHECK);	1726	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571		1727
572	call_pending ();	1728	call_pending (EV_A);
573	}	1729	}
574	while (!ev_loop_done);	1730	while (expect_true (
		1731	activecnt
		1732	&& !loop_done
		1733	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1734	));
575		1735
576	if (ev_loop_done != 2)	1736	if (loop_done == EVUNLOOP_ONE)
		1737	loop_done = EVUNLOOP_CANCEL;
		1738	}
		1739
		1740	void
		1741	ev_unloop (EV_P_ int how)
		1742	{
577	ev_loop_done = 0;	1743	loop_done = how;
578	}	1744	}
579		1745
580	/*****************************************************************************/	1746	/*****************************************************************************/
581		1747
582	static void	1748	void inline_size
583	wlist_add (WL *head, WL elem)	1749	wlist_add (WL *head, WL elem)
584	{	1750	{
585	elem->next = *head;	1751	elem->next = *head;
586	*head = elem;	1752	*head = elem;
587	}	1753	}
588		1754
589	static void	1755	void inline_size
590	wlist_del (WL *head, WL elem)	1756	wlist_del (WL *head, WL elem)
591	{	1757	{
592	while (*head)	1758	while (*head)
593	{	1759	{
594	if (*head == elem)	1760	if (*head == elem)
…		…
599		1765
600	head = &(*head)->next;	1766	head = &(*head)->next;
601	}	1767	}
602	}	1768	}
603		1769
604	static void	1770	void inline_speed
		1771	clear_pending (EV_P_ W w)
		1772	{
		1773	if (w->pending)
		1774	{
		1775	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1776	w->pending = 0;
		1777	}
		1778	}
		1779
		1780	int
		1781	ev_clear_pending (EV_P_ void *w)
		1782	{
		1783	W w_ = (W)w;
		1784	int pending = w_->pending;
		1785
		1786	if (expect_true (pending))
		1787	{
		1788	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1789	w_->pending = 0;
		1790	p->w = 0;
		1791	return p->events;
		1792	}
		1793	else
		1794	return 0;
		1795	}
		1796
		1797	void inline_size
		1798	pri_adjust (EV_P_ W w)
		1799	{
		1800	int pri = w->priority;
		1801	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1802	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1803	w->priority = pri;
		1804	}
		1805
		1806	void inline_speed
605	ev_start (W w, int active)	1807	ev_start (EV_P_ W w, int active)
606	{	1808	{
607	w->pending = 0;	1809	pri_adjust (EV_A_ w);
608	w->active = active;	1810	w->active = active;
		1811	ev_ref (EV_A);
609	}	1812	}
610		1813
611	static void	1814	void inline_size
612	ev_stop (W w)	1815	ev_stop (EV_P_ W w)
613	{	1816	{
614	if (w->pending)	1817	ev_unref (EV_A);
615	pendings [w->pending - 1].w = 0;
616
617	w->active = 0;	1818	w->active = 0;
618	}	1819	}
619		1820
620	/*****************************************************************************/	1821	/*****************************************************************************/
621		1822
622	void	1823	void noinline
623	evio_start (struct ev_io *w)	1824	ev_io_start (EV_P_ ev_io *w)
		1825	{
		1826	int fd = w->fd;
		1827
		1828	if (expect_false (ev_is_active (w)))
		1829	return;
		1830
		1831	assert (("ev_io_start called with negative fd", fd >= 0));
		1832
		1833	ev_start (EV_A_ (W)w, 1);
		1834	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1835	wlist_add (&anfds[fd].head, (WL)w);
		1836
		1837	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1838	w->events &= ~EV_IOFDSET;
		1839	}
		1840
		1841	void noinline
		1842	ev_io_stop (EV_P_ ev_io *w)
		1843	{
		1844	clear_pending (EV_A_ (W)w);
		1845	if (expect_false (!ev_is_active (w)))
		1846	return;
		1847
		1848	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1849
		1850	wlist_del (&anfds[w->fd].head, (WL)w);
		1851	ev_stop (EV_A_ (W)w);
		1852
		1853	fd_change (EV_A_ w->fd, 1);
		1854	}
		1855
		1856	void noinline
		1857	ev_timer_start (EV_P_ ev_timer *w)
		1858	{
		1859	if (expect_false (ev_is_active (w)))
		1860	return;
		1861
		1862	((WT)w)->at += mn_now;
		1863
		1864	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1865
		1866	ev_start (EV_A_ (W)w, ++timercnt);
		1867	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1868	timers [timercnt - 1] = (WT)w;
		1869	upheap (timers, timercnt - 1);
		1870
		1871	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1872	}
		1873
		1874	void noinline
		1875	ev_timer_stop (EV_P_ ev_timer *w)
		1876	{
		1877	clear_pending (EV_A_ (W)w);
		1878	if (expect_false (!ev_is_active (w)))
		1879	return;
		1880
		1881	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1882
		1883	{
		1884	int active = ((W)w)->active;
		1885
		1886	if (expect_true (--active < --timercnt))
		1887	{
		1888	timers [active] = timers [timercnt];
		1889	adjustheap (timers, timercnt, active);
		1890	}
		1891	}
		1892
		1893	((WT)w)->at -= mn_now;
		1894
		1895	ev_stop (EV_A_ (W)w);
		1896	}
		1897
		1898	void noinline
		1899	ev_timer_again (EV_P_ ev_timer *w)
624	{	1900	{
625	if (ev_is_active (w))	1901	if (ev_is_active (w))
626	return;
627
628	int fd = w->fd;
629
630	ev_start ((W)w, 1);
631	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
632	wlist_add ((WL *)&anfds[fd].head, (WL)w);
633
634	++fdchangecnt;
635	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
636	fdchanges [fdchangecnt - 1] = fd;
637	}
638
639	void
640	evio_stop (struct ev_io *w)
641	{
642	if (!ev_is_active (w))
643	return;
644
645	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
646	ev_stop ((W)w);
647
648	++fdchangecnt;
649	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650	fdchanges [fdchangecnt - 1] = w->fd;
651	}
652
653
654	void
655	evtimer_start (struct ev_timer *w)
656	{
657	if (ev_is_active (w))
658	return;
659
660	w->at += now;
661
662	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
663
664	ev_start ((W)w, ++timercnt);
665	array_needsize (timers, timermax, timercnt, );
666	timers [timercnt - 1] = w;
667	upheap ((WT *)timers, timercnt - 1);
668	}
669
670	void
671	evtimer_stop (struct ev_timer *w)
672	{
673	if (!ev_is_active (w))
674	return;
675
676	if (w->active < timercnt--)
677	{
678	timers [w->active - 1] = timers [timercnt];
679	downheap ((WT *)timers, timercnt, w->active - 1);
680	}	1902	{
681		1903	if (w->repeat)
682	ev_stop ((W)w);	1904	{
		1905	((WT)w)->at = mn_now + w->repeat;
		1906	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1907	}
		1908	else
		1909	ev_timer_stop (EV_A_ w);
		1910	}
		1911	else if (w->repeat)
		1912	{
		1913	w->at = w->repeat;
		1914	ev_timer_start (EV_A_ w);
		1915	}
683	}	1916	}
684		1917
685	void	1918	#if EV_PERIODIC_ENABLE
		1919	void noinline
686	evperiodic_start (struct ev_periodic *w)	1920	ev_periodic_start (EV_P_ ev_periodic *w)
687	{	1921	{
688	if (ev_is_active (w))	1922	if (expect_false (ev_is_active (w)))
689	return;	1923	return;
690		1924
691	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1925	if (w->reschedule_cb)
692		1926	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1927	else if (w->interval)
		1928	{
		1929	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
693	/* this formula differs from the one in periodic_reify because we do not always round up */	1930	/* this formula differs from the one in periodic_reify because we do not always round up */
694	if (w->interval)
695	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1931	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1932	}
		1933	else
		1934	((WT)w)->at = w->offset;
696		1935
697	ev_start ((W)w, ++periodiccnt);	1936	ev_start (EV_A_ (W)w, ++periodiccnt);
698	array_needsize (periodics, periodicmax, periodiccnt, );	1937	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
699	periodics [periodiccnt - 1] = w;	1938	periodics [periodiccnt - 1] = (WT)w;
700	upheap ((WT *)periodics, periodiccnt - 1);	1939	upheap (periodics, periodiccnt - 1);
701	}
702		1940
703	void	1941	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1942	}
		1943
		1944	void noinline
704	evperiodic_stop (struct ev_periodic *w)	1945	ev_periodic_stop (EV_P_ ev_periodic *w)
705	{	1946	{
		1947	clear_pending (EV_A_ (W)w);
706	if (!ev_is_active (w))	1948	if (expect_false (!ev_is_active (w)))
707	return;	1949	return;
708		1950
709	if (w->active < periodiccnt--)	1951	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1952
		1953	{
		1954	int active = ((W)w)->active;
		1955
		1956	if (expect_true (--active < --periodiccnt))
710	{	1957	{
711	periodics [w->active - 1] = periodics [periodiccnt];	1958	periodics [active] = periodics [periodiccnt];
712	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1959	adjustheap (periodics, periodiccnt, active);
713	}	1960	}
		1961	}
714		1962
715	ev_stop ((W)w);	1963	ev_stop (EV_A_ (W)w);
716	}	1964	}
717		1965
718	void	1966	void noinline
		1967	ev_periodic_again (EV_P_ ev_periodic *w)
		1968	{
		1969	/* TODO: use adjustheap and recalculation */
		1970	ev_periodic_stop (EV_A_ w);
		1971	ev_periodic_start (EV_A_ w);
		1972	}
		1973	#endif
		1974
		1975	#ifndef SA_RESTART
		1976	# define SA_RESTART 0
		1977	#endif
		1978
		1979	void noinline
719	evsignal_start (struct ev_signal *w)	1980	ev_signal_start (EV_P_ ev_signal *w)
720	{	1981	{
		1982	#if EV_MULTIPLICITY
		1983	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1984	#endif
721	if (ev_is_active (w))	1985	if (expect_false (ev_is_active (w)))
722	return;	1986	return;
723		1987
724	ev_start ((W)w, 1);	1988	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1989
		1990	evpipe_init (EV_A);
		1991
		1992	{
		1993	#ifndef _WIN32
		1994	sigset_t full, prev;
		1995	sigfillset (&full);
		1996	sigprocmask (SIG_SETMASK, &full, &prev);
		1997	#endif
		1998
725	array_needsize (signals, signalmax, w->signum, signals_init);	1999	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2000
		2001	#ifndef _WIN32
		2002	sigprocmask (SIG_SETMASK, &prev, 0);
		2003	#endif
		2004	}
		2005
		2006	ev_start (EV_A_ (W)w, 1);
726	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2007	wlist_add (&signals [w->signum - 1].head, (WL)w);
727		2008
728	if (!w->next)	2009	if (!((WL)w)->next)
729	{	2010	{
		2011	#if _WIN32
		2012	signal (w->signum, ev_sighandler);
		2013	#else
730	struct sigaction sa;	2014	struct sigaction sa;
731	sa.sa_handler = sighandler;	2015	sa.sa_handler = ev_sighandler;
732	sigfillset (&sa.sa_mask);	2016	sigfillset (&sa.sa_mask);
733	sa.sa_flags = 0;	2017	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
734	sigaction (w->signum, &sa, 0);	2018	sigaction (w->signum, &sa, 0);
		2019	#endif
735	}	2020	}
736	}	2021	}
737		2022
738	void	2023	void noinline
739	evsignal_stop (struct ev_signal *w)	2024	ev_signal_stop (EV_P_ ev_signal *w)
740	{	2025	{
		2026	clear_pending (EV_A_ (W)w);
741	if (!ev_is_active (w))	2027	if (expect_false (!ev_is_active (w)))
742	return;	2028	return;
743		2029
744	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2030	wlist_del (&signals [w->signum - 1].head, (WL)w);
745	ev_stop ((W)w);	2031	ev_stop (EV_A_ (W)w);
746		2032
747	if (!signals [w->signum - 1].head)	2033	if (!signals [w->signum - 1].head)
748	signal (w->signum, SIG_DFL);	2034	signal (w->signum, SIG_DFL);
749	}	2035	}
750		2036
751	void evidle_start (struct ev_idle *w)	2037	void
		2038	ev_child_start (EV_P_ ev_child *w)
752	{	2039	{
		2040	#if EV_MULTIPLICITY
		2041	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2042	#endif
753	if (ev_is_active (w))	2043	if (expect_false (ev_is_active (w)))
754	return;	2044	return;
755		2045
756	ev_start ((W)w, ++idlecnt);	2046	ev_start (EV_A_ (W)w, 1);
757	array_needsize (idles, idlemax, idlecnt, );	2047	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
758	idles [idlecnt - 1] = w;
759	}	2048	}
760		2049
761	void evidle_stop (struct ev_idle *w)	2050	void
		2051	ev_child_stop (EV_P_ ev_child *w)
762	{	2052	{
763	idles [w->active - 1] = idles [--idlecnt];	2053	clear_pending (EV_A_ (W)w);
		2054	if (expect_false (!ev_is_active (w)))
		2055	return;
		2056
		2057	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
764	ev_stop ((W)w);	2058	ev_stop (EV_A_ (W)w);
765	}	2059	}
766		2060
		2061	#if EV_STAT_ENABLE
		2062
		2063	# ifdef _WIN32
		2064	# undef lstat
		2065	# define lstat(a,b) _stati64 (a,b)
		2066	# endif
		2067
		2068	#define DEF_STAT_INTERVAL 5.0074891
		2069	#define MIN_STAT_INTERVAL 0.1074891
		2070
		2071	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2072
		2073	#if EV_USE_INOTIFY
		2074	# define EV_INOTIFY_BUFSIZE 8192
		2075
		2076	static void noinline
		2077	infy_add (EV_P_ ev_stat *w)
		2078	{
		2079	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);
		2080
		2081	if (w->wd < 0)
		2082	{
		2083	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2084
		2085	/* monitor some parent directory for speedup hints */
		2086	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2087	{
		2088	char path [4096];
		2089	strcpy (path, w->path);
		2090
		2091	do
		2092	{
		2093	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2094	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2095
		2096	char *pend = strrchr (path, '/');
		2097
		2098	if (!pend)
		2099	break; /* whoops, no '/', complain to your admin */
		2100
		2101	*pend = 0;
		2102	w->wd = inotify_add_watch (fs_fd, path, mask);
		2103	}
		2104	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2105	}
		2106	}
		2107	else
		2108	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2109
		2110	if (w->wd >= 0)
		2111	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2112	}
		2113
		2114	static void noinline
		2115	infy_del (EV_P_ ev_stat *w)
		2116	{
		2117	int slot;
		2118	int wd = w->wd;
		2119
		2120	if (wd < 0)
		2121	return;
		2122
		2123	w->wd = -2;
		2124	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2125	wlist_del (&fs_hash [slot].head, (WL)w);
		2126
		2127	/* remove this watcher, if others are watching it, they will rearm */
		2128	inotify_rm_watch (fs_fd, wd);
		2129	}
		2130
		2131	static void noinline
		2132	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2133	{
		2134	if (slot < 0)
		2135	/* overflow, need to check for all hahs slots */
		2136	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2137	infy_wd (EV_A_ slot, wd, ev);
		2138	else
		2139	{
		2140	WL w_;
		2141
		2142	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2143	{
		2144	ev_stat *w = (ev_stat *)w_;
		2145	w_ = w_->next; /* lets us remove this watcher and all before it */
		2146
		2147	if (w->wd == wd || wd == -1)
		2148	{
		2149	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2150	{
		2151	w->wd = -1;
		2152	infy_add (EV_A_ w); /* re-add, no matter what */
		2153	}
		2154
		2155	stat_timer_cb (EV_A_ &w->timer, 0);
		2156	}
		2157	}
		2158	}
		2159	}
		2160
		2161	static void
		2162	infy_cb (EV_P_ ev_io *w, int revents)
		2163	{
		2164	char buf [EV_INOTIFY_BUFSIZE];
		2165	struct inotify_event *ev = (struct inotify_event *)buf;
		2166	int ofs;
		2167	int len = read (fs_fd, buf, sizeof (buf));
		2168
		2169	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2170	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2171	}
		2172
		2173	void inline_size
		2174	infy_init (EV_P)
		2175	{
		2176	if (fs_fd != -2)
		2177	return;
		2178
		2179	fs_fd = inotify_init ();
		2180
		2181	if (fs_fd >= 0)
		2182	{
		2183	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2184	ev_set_priority (&fs_w, EV_MAXPRI);
		2185	ev_io_start (EV_A_ &fs_w);
		2186	}
		2187	}
		2188
		2189	void inline_size
		2190	infy_fork (EV_P)
		2191	{
		2192	int slot;
		2193
		2194	if (fs_fd < 0)
		2195	return;
		2196
		2197	close (fs_fd);
		2198	fs_fd = inotify_init ();
		2199
		2200	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2201	{
		2202	WL w_ = fs_hash [slot].head;
		2203	fs_hash [slot].head = 0;
		2204
		2205	while (w_)
		2206	{
		2207	ev_stat *w = (ev_stat *)w_;
		2208	w_ = w_->next; /* lets us add this watcher */
		2209
		2210	w->wd = -1;
		2211
		2212	if (fs_fd >= 0)
		2213	infy_add (EV_A_ w); /* re-add, no matter what */
		2214	else
		2215	ev_timer_start (EV_A_ &w->timer);
		2216	}
		2217
		2218	}
		2219	}
		2220
		2221	#endif
		2222
		2223	void
		2224	ev_stat_stat (EV_P_ ev_stat *w)
		2225	{
		2226	if (lstat (w->path, &w->attr) < 0)
		2227	w->attr.st_nlink = 0;
		2228	else if (!w->attr.st_nlink)
		2229	w->attr.st_nlink = 1;
		2230	}
		2231
		2232	static void noinline
		2233	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2234	{
		2235	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2236
		2237	/* we copy this here each the time so that */
		2238	/* prev has the old value when the callback gets invoked */
		2239	w->prev = w->attr;
		2240	ev_stat_stat (EV_A_ w);
		2241
		2242	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2243	if (
		2244	w->prev.st_dev != w->attr.st_dev
		2245	|| w->prev.st_ino != w->attr.st_ino
		2246	|| w->prev.st_mode != w->attr.st_mode
		2247	|| w->prev.st_nlink != w->attr.st_nlink
		2248	|| w->prev.st_uid != w->attr.st_uid
		2249	|| w->prev.st_gid != w->attr.st_gid
		2250	|| w->prev.st_rdev != w->attr.st_rdev
		2251	|| w->prev.st_size != w->attr.st_size
		2252	|| w->prev.st_atime != w->attr.st_atime
		2253	|| w->prev.st_mtime != w->attr.st_mtime
		2254	|| w->prev.st_ctime != w->attr.st_ctime
		2255	) {
		2256	#if EV_USE_INOTIFY
		2257	infy_del (EV_A_ w);
		2258	infy_add (EV_A_ w);
		2259	ev_stat_stat (EV_A_ w); /* avoid race... */
		2260	#endif
		2261
		2262	ev_feed_event (EV_A_ w, EV_STAT);
		2263	}
		2264	}
		2265
		2266	void
		2267	ev_stat_start (EV_P_ ev_stat *w)
		2268	{
		2269	if (expect_false (ev_is_active (w)))
		2270	return;
		2271
		2272	/* since we use memcmp, we need to clear any padding data etc. */
		2273	memset (&w->prev, 0, sizeof (ev_statdata));
		2274	memset (&w->attr, 0, sizeof (ev_statdata));
		2275
		2276	ev_stat_stat (EV_A_ w);
		2277
		2278	if (w->interval < MIN_STAT_INTERVAL)
		2279	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2280
		2281	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2282	ev_set_priority (&w->timer, ev_priority (w));
		2283
		2284	#if EV_USE_INOTIFY
		2285	infy_init (EV_A);
		2286
		2287	if (fs_fd >= 0)
		2288	infy_add (EV_A_ w);
		2289	else
		2290	#endif
		2291	ev_timer_start (EV_A_ &w->timer);
		2292
		2293	ev_start (EV_A_ (W)w, 1);
		2294	}
		2295
		2296	void
		2297	ev_stat_stop (EV_P_ ev_stat *w)
		2298	{
		2299	clear_pending (EV_A_ (W)w);
		2300	if (expect_false (!ev_is_active (w)))
		2301	return;
		2302
		2303	#if EV_USE_INOTIFY
		2304	infy_del (EV_A_ w);
		2305	#endif
		2306	ev_timer_stop (EV_A_ &w->timer);
		2307
		2308	ev_stop (EV_A_ (W)w);
		2309	}
		2310	#endif
		2311
		2312	#if EV_IDLE_ENABLE
		2313	void
		2314	ev_idle_start (EV_P_ ev_idle *w)
		2315	{
		2316	if (expect_false (ev_is_active (w)))
		2317	return;
		2318
		2319	pri_adjust (EV_A_ (W)w);
		2320
		2321	{
		2322	int active = ++idlecnt [ABSPRI (w)];
		2323
		2324	++idleall;
		2325	ev_start (EV_A_ (W)w, active);
		2326
		2327	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2328	idles [ABSPRI (w)][active - 1] = w;
		2329	}
		2330	}
		2331
		2332	void
		2333	ev_idle_stop (EV_P_ ev_idle *w)
		2334	{
		2335	clear_pending (EV_A_ (W)w);
		2336	if (expect_false (!ev_is_active (w)))
		2337	return;
		2338
		2339	{
		2340	int active = ((W)w)->active;
		2341
		2342	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2343	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2344
		2345	ev_stop (EV_A_ (W)w);
		2346	--idleall;
		2347	}
		2348	}
		2349	#endif
		2350
		2351	void
		2352	ev_prepare_start (EV_P_ ev_prepare *w)
		2353	{
		2354	if (expect_false (ev_is_active (w)))
		2355	return;
		2356
		2357	ev_start (EV_A_ (W)w, ++preparecnt);
		2358	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2359	prepares [preparecnt - 1] = w;
		2360	}
		2361
		2362	void
		2363	ev_prepare_stop (EV_P_ ev_prepare *w)
		2364	{
		2365	clear_pending (EV_A_ (W)w);
		2366	if (expect_false (!ev_is_active (w)))
		2367	return;
		2368
		2369	{
		2370	int active = ((W)w)->active;
		2371	prepares [active - 1] = prepares [--preparecnt];
		2372	((W)prepares [active - 1])->active = active;
		2373	}
		2374
		2375	ev_stop (EV_A_ (W)w);
		2376	}
		2377
		2378	void
767	void evcheck_start (struct ev_check *w)	2379	ev_check_start (EV_P_ ev_check *w)
768	{	2380	{
769	if (ev_is_active (w))	2381	if (expect_false (ev_is_active (w)))
770	return;	2382	return;
771		2383
772	ev_start ((W)w, ++checkcnt);	2384	ev_start (EV_A_ (W)w, ++checkcnt);
773	array_needsize (checks, checkmax, checkcnt, );	2385	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
774	checks [checkcnt - 1] = w;	2386	checks [checkcnt - 1] = w;
775	}	2387	}
776		2388
		2389	void
777	void evcheck_stop (struct ev_check *w)	2390	ev_check_stop (EV_P_ ev_check *w)
778	{	2391	{
		2392	clear_pending (EV_A_ (W)w);
		2393	if (expect_false (!ev_is_active (w)))
		2394	return;
		2395
		2396	{
		2397	int active = ((W)w)->active;
779	checks [w->active - 1] = checks [--checkcnt];	2398	checks [active - 1] = checks [--checkcnt];
		2399	((W)checks [active - 1])->active = active;
		2400	}
		2401
780	ev_stop ((W)w);	2402	ev_stop (EV_A_ (W)w);
781	}	2403	}
		2404
		2405	#if EV_EMBED_ENABLE
		2406	void noinline
		2407	ev_embed_sweep (EV_P_ ev_embed *w)
		2408	{
		2409	ev_loop (w->other, EVLOOP_NONBLOCK);
		2410	}
		2411
		2412	static void
		2413	embed_io_cb (EV_P_ ev_io *io, int revents)
		2414	{
		2415	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2416
		2417	if (ev_cb (w))
		2418	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2419	else
		2420	ev_loop (w->other, EVLOOP_NONBLOCK);
		2421	}
		2422
		2423	static void
		2424	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2425	{
		2426	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2427
		2428	{
		2429	struct ev_loop *loop = w->other;
		2430
		2431	while (fdchangecnt)
		2432	{
		2433	fd_reify (EV_A);
		2434	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2435	}
		2436	}
		2437	}
		2438
		2439	#if 0
		2440	static void
		2441	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2442	{
		2443	ev_idle_stop (EV_A_ idle);
		2444	}
		2445	#endif
		2446
		2447	void
		2448	ev_embed_start (EV_P_ ev_embed *w)
		2449	{
		2450	if (expect_false (ev_is_active (w)))
		2451	return;
		2452
		2453	{
		2454	struct ev_loop *loop = w->other;
		2455	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2456	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2457	}
		2458
		2459	ev_set_priority (&w->io, ev_priority (w));
		2460	ev_io_start (EV_A_ &w->io);
		2461
		2462	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2463	ev_set_priority (&w->prepare, EV_MINPRI);
		2464	ev_prepare_start (EV_A_ &w->prepare);
		2465
		2466	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2467
		2468	ev_start (EV_A_ (W)w, 1);
		2469	}
		2470
		2471	void
		2472	ev_embed_stop (EV_P_ ev_embed *w)
		2473	{
		2474	clear_pending (EV_A_ (W)w);
		2475	if (expect_false (!ev_is_active (w)))
		2476	return;
		2477
		2478	ev_io_stop (EV_A_ &w->io);
		2479	ev_prepare_stop (EV_A_ &w->prepare);
		2480
		2481	ev_stop (EV_A_ (W)w);
		2482	}
		2483	#endif
		2484
		2485	#if EV_FORK_ENABLE
		2486	void
		2487	ev_fork_start (EV_P_ ev_fork *w)
		2488	{
		2489	if (expect_false (ev_is_active (w)))
		2490	return;
		2491
		2492	ev_start (EV_A_ (W)w, ++forkcnt);
		2493	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2494	forks [forkcnt - 1] = w;
		2495	}
		2496
		2497	void
		2498	ev_fork_stop (EV_P_ ev_fork *w)
		2499	{
		2500	clear_pending (EV_A_ (W)w);
		2501	if (expect_false (!ev_is_active (w)))
		2502	return;
		2503
		2504	{
		2505	int active = ((W)w)->active;
		2506	forks [active - 1] = forks [--forkcnt];
		2507	((W)forks [active - 1])->active = active;
		2508	}
		2509
		2510	ev_stop (EV_A_ (W)w);
		2511	}
		2512	#endif
		2513
		2514	#if EV_ASYNC_ENABLE
		2515	void
		2516	ev_async_start (EV_P_ ev_async *w)
		2517	{
		2518	if (expect_false (ev_is_active (w)))
		2519	return;
		2520
		2521	evpipe_init (EV_A);
		2522
		2523	ev_start (EV_A_ (W)w, ++asynccnt);
		2524	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2525	asyncs [asynccnt - 1] = w;
		2526	}
		2527
		2528	void
		2529	ev_async_stop (EV_P_ ev_async *w)
		2530	{
		2531	clear_pending (EV_A_ (W)w);
		2532	if (expect_false (!ev_is_active (w)))
		2533	return;
		2534
		2535	{
		2536	int active = ((W)w)->active;
		2537	asyncs [active - 1] = asyncs [--asynccnt];
		2538	((W)asyncs [active - 1])->active = active;
		2539	}
		2540
		2541	ev_stop (EV_A_ (W)w);
		2542	}
		2543
		2544	void
		2545	ev_async_send (EV_P_ ev_async *w)
		2546	{
		2547	w->sent = 1;
		2548	evpipe_write (EV_A_ &gotasync);
		2549	}
		2550	#endif
782		2551
783	/*****************************************************************************/	2552	/*****************************************************************************/
784		2553
785	#if 0	2554	struct ev_once
786		2555	{
787	struct ev_io wio;	2556	ev_io io;
		2557	ev_timer to;
		2558	void (*cb)(int revents, void *arg);
		2559	void *arg;
		2560	};
788		2561
789	static void	2562	static void
790	sin_cb (struct ev_io *w, int revents)	2563	once_cb (EV_P_ struct ev_once *once, int revents)
791	{	2564	{
792	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2565	void (*cb)(int revents, void *arg) = once->cb;
		2566	void *arg = once->arg;
		2567
		2568	ev_io_stop (EV_A_ &once->io);
		2569	ev_timer_stop (EV_A_ &once->to);
		2570	ev_free (once);
		2571
		2572	cb (revents, arg);
793	}	2573	}
794		2574
795	static void	2575	static void
796	ocb (struct ev_timer *w, int revents)	2576	once_cb_io (EV_P_ ev_io *w, int revents)
797	{	2577	{
798	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2578	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
799	evtimer_stop (w);
800	evtimer_start (w);
801	}	2579	}
802		2580
803	static void	2581	static void
804	scb (struct ev_signal *w, int revents)	2582	once_cb_to (EV_P_ ev_timer *w, int revents)
805	{	2583	{
806	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2584	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
807	evio_stop (&wio);
808	evio_start (&wio);
809	}	2585	}
810		2586
811	static void	2587	void
812	gcb (struct ev_signal *w, int revents)	2588	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
813	{	2589	{
814	fprintf (stderr, "generic %x\n", revents);	2590	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
815		2591
816	}	2592	if (expect_false (!once))
817
818	int main (void)
819	{
820	ev_init (0);
821
822	evio_init (&wio, sin_cb, 0, EV_READ);
823	evio_start (&wio);
824
825	struct ev_timer t[10000];
826
827	#if 0
828	int i;
829	for (i = 0; i < 10000; ++i)
830	{
831	struct ev_timer *w = t + i;
832	evw_init (w, ocb, i);
833	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
834	evtimer_start (w);
835	if (drand48 () < 0.5)
836	evtimer_stop (w);
837	}	2593	{
838	#endif	2594	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
839
840	struct ev_timer t1;
841	evtimer_init (&t1, ocb, 5, 10);
842	evtimer_start (&t1);
843
844	struct ev_signal sig;
845	evsignal_init (&sig, scb, SIGQUIT);
846	evsignal_start (&sig);
847
848	struct ev_check cw;
849	evcheck_init (&cw, gcb);
850	evcheck_start (&cw);
851
852	struct ev_idle iw;
853	evidle_init (&iw, gcb);
854	evidle_start (&iw);
855
856	ev_loop (0);
857
858	return 0;	2595	return;
859	}	2596	}
860		2597
861	#endif	2598	once->cb = cb;
		2599	once->arg = arg;
862		2600
		2601	ev_init (&once->io, once_cb_io);
		2602	if (fd >= 0)
		2603	{
		2604	ev_io_set (&once->io, fd, events);
		2605	ev_io_start (EV_A_ &once->io);
		2606	}
863		2607
		2608	ev_init (&once->to, once_cb_to);
		2609	if (timeout >= 0.)
		2610	{
		2611	ev_timer_set (&once->to, timeout, 0.);
		2612	ev_timer_start (EV_A_ &once->to);
		2613	}
		2614	}
864		2615
		2616	#if EV_MULTIPLICITY
		2617	#include "ev_wrap.h"
		2618	#endif
865		2619
		2620	#ifdef __cplusplus
		2621	}
		2622	#endif
		2623

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