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Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.219 by root, Wed Apr 2 10:55:39 2008 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are met:
		9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	#ifndef EV_STANDALONE
		45	# ifdef EV_CONFIG_H
		46	# include EV_CONFIG_H
		47	# else
		48	# include "config.h"
		49	# endif
		50
		51	# if HAVE_CLOCK_GETTIME
		52	# ifndef EV_USE_MONOTONIC
		53	# define EV_USE_MONOTONIC 1
		54	# endif
		55	# ifndef EV_USE_REALTIME
		56	# define EV_USE_REALTIME 1
		57	# endif
		58	# else
		59	# ifndef EV_USE_MONOTONIC
		60	# define EV_USE_MONOTONIC 0
		61	# endif
		62	# ifndef EV_USE_REALTIME
		63	# define EV_USE_REALTIME 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_NANOSLEEP
		68	# if HAVE_NANOSLEEP
		69	# define EV_USE_NANOSLEEP 1
		70	# else
		71	# define EV_USE_NANOSLEEP 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_SELECT
		76	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		77	# define EV_USE_SELECT 1
		78	# else
		79	# define EV_USE_SELECT 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_POLL
		84	# if HAVE_POLL && HAVE_POLL_H
		85	# define EV_USE_POLL 1
		86	# else
		87	# define EV_USE_POLL 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_EPOLL
		92	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		93	# define EV_USE_EPOLL 1
		94	# else
		95	# define EV_USE_EPOLL 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_KQUEUE
		100	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		101	# define EV_USE_KQUEUE 1
		102	# else
		103	# define EV_USE_KQUEUE 0
		104	# endif
		105	# endif
		106
		107	# ifndef EV_USE_PORT
		108	# if HAVE_PORT_H && HAVE_PORT_CREATE
		109	# define EV_USE_PORT 1
		110	# else
		111	# define EV_USE_PORT 0
		112	# endif
		113	# endif
		114
		115	# ifndef EV_USE_INOTIFY
		116	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		117	# define EV_USE_INOTIFY 1
		118	# else
		119	# define EV_USE_INOTIFY 0
		120	# endif
		121	# endif
		122
		123	#endif
		124
1	#include <math.h>	125	#include <math.h>
2	#include <stdlib.h>	126	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	127	#include <fcntl.h>
5	#include <signal.h>	128	#include <stddef.h>
6		129
7	#include <stdio.h>	130	#include <stdio.h>
8		131
9	#include <assert.h>	132	#include <assert.h>
10	#include <errno.h>	133	#include <errno.h>
11	#include <sys/time.h>	134	#include <sys/types.h>
12	#include <time.h>	135	#include <time.h>
13		136
		137	#include <signal.h>
		138
		139	#ifdef EV_H
		140	# include EV_H
		141	#else
		142	# include "ev.h"
		143	#endif
		144
		145	#ifndef _WIN32
		146	# include <sys/time.h>
		147	# include <sys/wait.h>
		148	# include <unistd.h>
		149	#else
		150	# define WIN32_LEAN_AND_MEAN
		151	# include <windows.h>
		152	# ifndef EV_SELECT_IS_WINSOCKET
		153	# define EV_SELECT_IS_WINSOCKET 1
		154	# endif
		155	#endif
		156
		157	/**/
		158
		159	#ifndef EV_USE_MONOTONIC
		160	# define EV_USE_MONOTONIC 0
		161	#endif
		162
		163	#ifndef EV_USE_REALTIME
		164	# define EV_USE_REALTIME 0
		165	#endif
		166
		167	#ifndef EV_USE_NANOSLEEP
		168	# define EV_USE_NANOSLEEP 0
		169	#endif
		170
		171	#ifndef EV_USE_SELECT
		172	# define EV_USE_SELECT 1
		173	#endif
		174
		175	#ifndef EV_USE_POLL
		176	# ifdef _WIN32
		177	# define EV_USE_POLL 0
		178	# else
		179	# define EV_USE_POLL 1
		180	# endif
		181	#endif
		182
		183	#ifndef EV_USE_EPOLL
		184	# define EV_USE_EPOLL 0
		185	#endif
		186
		187	#ifndef EV_USE_KQUEUE
		188	# define EV_USE_KQUEUE 0
		189	#endif
		190
		191	#ifndef EV_USE_PORT
		192	# define EV_USE_PORT 0
		193	#endif
		194
		195	#ifndef EV_USE_INOTIFY
		196	# define EV_USE_INOTIFY 0
		197	#endif
		198
		199	#ifndef EV_PID_HASHSIZE
		200	# if EV_MINIMAL
		201	# define EV_PID_HASHSIZE 1
		202	# else
		203	# define EV_PID_HASHSIZE 16
		204	# endif
		205	#endif
		206
		207	#ifndef EV_INOTIFY_HASHSIZE
		208	# if EV_MINIMAL
		209	# define EV_INOTIFY_HASHSIZE 1
		210	# else
		211	# define EV_INOTIFY_HASHSIZE 16
		212	# endif
		213	#endif
		214
		215	/**/
		216
14	#ifdef CLOCK_MONOTONIC	217	#ifndef CLOCK_MONOTONIC
		218	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	219	# define EV_USE_MONOTONIC 0
		220	#endif
		221
		222	#ifndef CLOCK_REALTIME
		223	# undef EV_USE_REALTIME
		224	# define EV_USE_REALTIME 0
		225	#endif
		226
		227	#if !EV_STAT_ENABLE
		228	# undef EV_USE_INOTIFY
		229	# define EV_USE_INOTIFY 0
		230	#endif
		231
		232	#if !EV_USE_NANOSLEEP
		233	# ifndef _WIN32
		234	# include <sys/select.h>
16	#endif	235	# endif
		236	#endif
17		237
18	#define HAVE_REALTIME 1	238	#if EV_USE_INOTIFY
19	#define HAVE_EPOLL 1	239	# include <sys/inotify.h>
20	#define HAVE_SELECT 1	240	#endif
		241
		242	#if EV_SELECT_IS_WINSOCKET
		243	# include <winsock.h>
		244	#endif
		245
		246	/**/
		247
		248	/*
		249	* This is used to avoid floating point rounding problems.
		250	* It is added to ev_rt_now when scheduling periodics
		251	* to ensure progress, time-wise, even when rounding
		252	* errors are against us.
		253	* This value is good at least till the year 4000.
		254	* Better solutions welcome.
		255	*/
		256	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
21		257
22	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	258	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23	#define MAX_BLOCKTIME 60.	259	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		260	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
24		261
		262	#if __GNUC__ >= 4
		263	# define expect(expr,value) __builtin_expect ((expr),(value))
		264	# define noinline __attribute__ ((noinline))
		265	#else
		266	# define expect(expr,value) (expr)
		267	# define noinline
		268	# if __STDC_VERSION__ < 199901L
		269	# define inline
		270	# endif
		271	#endif
		272
		273	#define expect_false(expr) expect ((expr) != 0, 0)
		274	#define expect_true(expr) expect ((expr) != 0, 1)
		275	#define inline_size static inline
		276
		277	#if EV_MINIMAL
		278	# define inline_speed static noinline
		279	#else
		280	# define inline_speed static inline
		281	#endif
		282
		283	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		284	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		285
		286	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		287	#define EMPTY2(a,b) /* used to suppress some warnings */
		288
		289	typedef ev_watcher *W;
		290	typedef ev_watcher_list *WL;
		291	typedef ev_watcher_time *WT;
		292
		293	#if EV_USE_MONOTONIC
		294	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		295	/* giving it a reasonably high chance of working on typical architetcures */
		296	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		297	#endif
		298
		299	#ifdef _WIN32
		300	# include "ev_win32.c"
		301	#endif
		302
		303	/*****************************************************************************/
		304
		305	static void (*syserr_cb)(const char *msg);
		306
		307	void
		308	ev_set_syserr_cb (void (*cb)(const char *msg))
		309	{
		310	syserr_cb = cb;
		311	}
		312
		313	static void noinline
		314	syserr (const char *msg)
		315	{
		316	if (!msg)
		317	msg = "(libev) system error";
		318
		319	if (syserr_cb)
		320	syserr_cb (msg);
		321	else
		322	{
		323	perror (msg);
		324	abort ();
		325	}
		326	}
		327
		328	static void *(*alloc)(void *ptr, long size);
		329
		330	void
		331	ev_set_allocator (void *(*cb)(void *ptr, long size))
		332	{
		333	alloc = cb;
		334	}
		335
		336	inline_speed void *
		337	ev_realloc (void *ptr, long size)
		338	{
		339	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		340
		341	if (!ptr && size)
		342	{
		343	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		344	abort ();
		345	}
		346
		347	return ptr;
		348	}
		349
		350	#define ev_malloc(size) ev_realloc (0, (size))
		351	#define ev_free(ptr) ev_realloc ((ptr), 0)
		352
		353	/*****************************************************************************/
		354
		355	typedef struct
		356	{
		357	WL head;
		358	unsigned char events;
		359	unsigned char reify;
		360	#if EV_SELECT_IS_WINSOCKET
		361	SOCKET handle;
		362	#endif
		363	} ANFD;
		364
		365	typedef struct
		366	{
		367	W w;
		368	int events;
		369	} ANPENDING;
		370
		371	#if EV_USE_INOTIFY
		372	typedef struct
		373	{
		374	WL head;
		375	} ANFS;
		376	#endif
		377
		378	#if EV_MULTIPLICITY
		379
		380	struct ev_loop
		381	{
		382	ev_tstamp ev_rt_now;
		383	#define ev_rt_now ((loop)->ev_rt_now)
		384	#define VAR(name,decl) decl;
		385	#include "ev_vars.h"
		386	#undef VAR
		387	};
25	#include "ev.h"	388	#include "ev_wrap.h"
26		389
27	struct ev_watcher {	390	static struct ev_loop default_loop_struct;
28	EV_WATCHER (ev_watcher);	391	struct ev_loop *ev_default_loop_ptr;
29	};
30		392
31	struct ev_watcher_list {	393	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		394
35	static ev_tstamp now, diff; /* monotonic clock */
36	ev_tstamp ev_now;	395	ev_tstamp ev_rt_now;
37	int ev_method;	396	#define VAR(name,decl) static decl;
		397	#include "ev_vars.h"
		398	#undef VAR
38		399
39	static int have_monotonic; /* runtime */	400	static int ev_default_loop_ptr;
40		401
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	402	#endif
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		403
45	/*****************************************************************************/	404	/*****************************************************************************/
46		405
47	ev_tstamp	406	ev_tstamp
48	ev_time (void)	407	ev_time (void)
49	{	408	{
50	#if HAVE_REALTIME	409	#if EV_USE_REALTIME
51	struct timespec ts;	410	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	411	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	412	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	413	#else
55	struct timeval tv;	414	struct timeval tv;
56	gettimeofday (&tv, 0);	415	gettimeofday (&tv, 0);
57	return tv.tv_sec + tv.tv_usec * 1e-6;	416	return tv.tv_sec + tv.tv_usec * 1e-6;
58	#endif	417	#endif
59	}	418	}
60		419
61	static ev_tstamp	420	ev_tstamp inline_size
62	get_clock (void)	421	get_clock (void)
63	{	422	{
64	#if HAVE_MONOTONIC	423	#if EV_USE_MONOTONIC
65	if (have_monotonic)	424	if (expect_true (have_monotonic))
66	{	425	{
67	struct timespec ts;	426	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	427	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	428	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	429	}
71	#endif	430	#endif
72		431
73	return ev_time ();	432	return ev_time ();
74	}	433	}
75		434
76	#define array_needsize(base,cur,cnt,init) \	435	#if EV_MULTIPLICITY
77	if ((cnt) > cur) \	436	ev_tstamp
78	{ \	437	ev_now (EV_P)
79	int newcnt = cur ? cur << 1 : 16; \	438	{
80	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	439	return ev_rt_now;
81	base = realloc (base, sizeof (*base) * (newcnt)); \	440	}
82	init (base + cur, newcnt - cur); \	441	#endif
83	cur = newcnt; \	442
		443	void
		444	ev_sleep (ev_tstamp delay)
		445	{
		446	if (delay > 0.)
84	}	447	{
		448	#if EV_USE_NANOSLEEP
		449	struct timespec ts;
		450
		451	ts.tv_sec = (time_t)delay;
		452	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		453
		454	nanosleep (&ts, 0);
		455	#elif defined(_WIN32)
		456	Sleep ((unsigned long)(delay * 1e3));
		457	#else
		458	struct timeval tv;
		459
		460	tv.tv_sec = (time_t)delay;
		461	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		462
		463	select (0, 0, 0, 0, &tv);
		464	#endif
		465	}
		466	}
85		467
86	/*****************************************************************************/	468	/*****************************************************************************/
87		469
		470	int inline_size
		471	array_nextsize (int elem, int cur, int cnt)
		472	{
		473	int ncur = cur + 1;
		474
		475	do
		476	ncur <<= 1;
		477	while (cnt > ncur);
		478
		479	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		480	if (elem * ncur > 4096)
		481	{
		482	ncur *= elem;
		483	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		484	ncur = ncur - sizeof (void *) * 4;
		485	ncur /= elem;
		486	}
		487
		488	return ncur;
		489	}
		490
		491	static noinline void *
		492	array_realloc (int elem, void *base, int *cur, int cnt)
		493	{
		494	*cur = array_nextsize (elem, *cur, cnt);
		495	return ev_realloc (base, elem * *cur);
		496	}
		497
		498	#define array_needsize(type,base,cur,cnt,init) \
		499	if (expect_false ((cnt) > (cur))) \
		500	{ \
		501	int ocur_ = (cur); \
		502	(base) = (type *)array_realloc \
		503	(sizeof (type), (base), &(cur), (cnt)); \
		504	init ((base) + (ocur_), (cur) - ocur_); \
		505	}
		506
		507	#if 0
		508	#define array_slim(type,stem) \
		509	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		510	{ \
		511	stem ## max = array_roundsize (stem ## cnt >> 1); \
		512	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		513	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		514	}
		515	#endif
		516
		517	#define array_free(stem, idx) \
		518	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		519
		520	/*****************************************************************************/
		521
		522	void noinline
		523	ev_feed_event (EV_P_ void *w, int revents)
		524	{
		525	W w_ = (W)w;
		526	int pri = ABSPRI (w_);
		527
		528	if (expect_false (w_->pending))
		529	pendings [pri][w_->pending - 1].events |= revents;
		530	else
		531	{
		532	w_->pending = ++pendingcnt [pri];
		533	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		534	pendings [pri][w_->pending - 1].w = w_;
		535	pendings [pri][w_->pending - 1].events = revents;
		536	}
		537	}
		538
		539	void inline_speed
		540	queue_events (EV_P_ W *events, int eventcnt, int type)
		541	{
		542	int i;
		543
		544	for (i = 0; i < eventcnt; ++i)
		545	ev_feed_event (EV_A_ events [i], type);
		546	}
		547
		548	/*****************************************************************************/
		549
		550	void inline_size
		551	anfds_init (ANFD *base, int count)
		552	{
		553	while (count--)
		554	{
		555	base->head = 0;
		556	base->events = EV_NONE;
		557	base->reify = 0;
		558
		559	++base;
		560	}
		561	}
		562
		563	void inline_speed
		564	fd_event (EV_P_ int fd, int revents)
		565	{
		566	ANFD *anfd = anfds + fd;
		567	ev_io *w;
		568
		569	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		570	{
		571	int ev = w->events & revents;
		572
		573	if (ev)
		574	ev_feed_event (EV_A_ (W)w, ev);
		575	}
		576	}
		577
		578	void
		579	ev_feed_fd_event (EV_P_ int fd, int revents)
		580	{
		581	if (fd >= 0 && fd < anfdmax)
		582	fd_event (EV_A_ fd, revents);
		583	}
		584
		585	void inline_size
		586	fd_reify (EV_P)
		587	{
		588	int i;
		589
		590	for (i = 0; i < fdchangecnt; ++i)
		591	{
		592	int fd = fdchanges [i];
		593	ANFD *anfd = anfds + fd;
		594	ev_io *w;
		595
		596	unsigned char events = 0;
		597
		598	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		599	events |= (unsigned char)w->events;
		600
		601	#if EV_SELECT_IS_WINSOCKET
		602	if (events)
		603	{
		604	unsigned long argp;
		605	#ifdef EV_FD_TO_WIN32_HANDLE
		606	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		607	#else
		608	anfd->handle = _get_osfhandle (fd);
		609	#endif
		610	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		611	}
		612	#endif
		613
		614	{
		615	unsigned char o_events = anfd->events;
		616	unsigned char o_reify = anfd->reify;
		617
		618	anfd->reify = 0;
		619	anfd->events = events;
		620
		621	if (o_events != events || o_reify & EV_IOFDSET)
		622	backend_modify (EV_A_ fd, o_events, events);
		623	}
		624	}
		625
		626	fdchangecnt = 0;
		627	}
		628
		629	void inline_size
		630	fd_change (EV_P_ int fd, int flags)
		631	{
		632	unsigned char reify = anfds [fd].reify;
		633	anfds [fd].reify |= flags;
		634
		635	if (expect_true (!reify))
		636	{
		637	++fdchangecnt;
		638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		639	fdchanges [fdchangecnt - 1] = fd;
		640	}
		641	}
		642
		643	void inline_speed
		644	fd_kill (EV_P_ int fd)
		645	{
		646	ev_io *w;
		647
		648	while ((w = (ev_io *)anfds [fd].head))
		649	{
		650	ev_io_stop (EV_A_ w);
		651	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		652	}
		653	}
		654
		655	int inline_size
		656	fd_valid (int fd)
		657	{
		658	#ifdef _WIN32
		659	return _get_osfhandle (fd) != -1;
		660	#else
		661	return fcntl (fd, F_GETFD) != -1;
		662	#endif
		663	}
		664
		665	/* called on EBADF to verify fds */
		666	static void noinline
		667	fd_ebadf (EV_P)
		668	{
		669	int fd;
		670
		671	for (fd = 0; fd < anfdmax; ++fd)
		672	if (anfds [fd].events)
		673	if (!fd_valid (fd) == -1 && errno == EBADF)
		674	fd_kill (EV_A_ fd);
		675	}
		676
		677	/* called on ENOMEM in select/poll to kill some fds and retry */
		678	static void noinline
		679	fd_enomem (EV_P)
		680	{
		681	int fd;
		682
		683	for (fd = anfdmax; fd--; )
		684	if (anfds [fd].events)
		685	{
		686	fd_kill (EV_A_ fd);
		687	return;
		688	}
		689	}
		690
		691	/* usually called after fork if backend needs to re-arm all fds from scratch */
		692	static void noinline
		693	fd_rearm_all (EV_P)
		694	{
		695	int fd;
		696
		697	for (fd = 0; fd < anfdmax; ++fd)
		698	if (anfds [fd].events)
		699	{
		700	anfds [fd].events = 0;
		701	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		702	}
		703	}
		704
		705	/*****************************************************************************/
		706
		707	void inline_speed
		708	upheap (WT *heap, int k)
		709	{
		710	WT w = heap [k];
		711
		712	while (k)
		713	{
		714	int p = (k - 1) >> 1;
		715
		716	if (heap [p]->at <= w->at)
		717	break;
		718
		719	heap [k] = heap [p];
		720	((W)heap [k])->active = k + 1;
		721	k = p;
		722	}
		723
		724	heap [k] = w;
		725	((W)heap [k])->active = k + 1;
		726	}
		727
		728	void inline_speed
		729	downheap (WT *heap, int N, int k)
		730	{
		731	WT w = heap [k];
		732
		733	for (;;)
		734	{
		735	int c = (k << 1) + 1;
		736
		737	if (c >= N)
		738	break;
		739
		740	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		741	? 1 : 0;
		742
		743	if (w->at <= heap [c]->at)
		744	break;
		745
		746	heap [k] = heap [c];
		747	((W)heap [k])->active = k + 1;
		748
		749	k = c;
		750	}
		751
		752	heap [k] = w;
		753	((W)heap [k])->active = k + 1;
		754	}
		755
		756	void inline_size
		757	adjustheap (WT *heap, int N, int k)
		758	{
		759	upheap (heap, k);
		760	downheap (heap, N, k);
		761	}
		762
		763	/*****************************************************************************/
		764
88	typedef struct	765	typedef struct
89	{	766	{
90	struct ev_io *head;	767	WL head;
91	unsigned char wev, rev; /* want, received event set */	768	EV_ATOMIC_T gotsig;
92	} ANFD;
93
94	static ANFD *anfds;
95	static int anfdmax;
96
97	static int *fdchanges;
98	static int fdchangemax, fdchangecnt;
99
100	static void
101	anfds_init (ANFD *base, int count)
102	{
103	while (count--)
104	{
105	base->head = 0;
106	base->wev = base->rev = EV_NONE;
107	++base;
108	}
109	}
110
111	typedef struct
112	{
113	struct ev_watcher *w;
114	int events;
115	} ANPENDING;
116
117	static ANPENDING *pendings;
118	static int pendingmax, pendingcnt;
119
120	static void
121	event (struct ev_watcher *w, int events)
122	{
123	w->pending = ++pendingcnt;
124	array_needsize (pendings, pendingmax, pendingcnt, );
125	pendings [pendingcnt - 1].w = w;
126	pendings [pendingcnt - 1].events = events;
127	}
128
129	static void
130	fd_event (int fd, int events)
131	{
132	ANFD *anfd = anfds + fd;
133	struct ev_io *w;
134
135	for (w = anfd->head; w; w = w->next)
136	{
137	int ev = w->events & events;
138
139	if (ev)
140	event ((struct ev_watcher *)w, ev);
141	}
142	}
143
144	/*****************************************************************************/
145
146	static struct ev_timer **atimers;
147	static int atimermax, atimercnt;
148
149	static struct ev_timer **rtimers;
150	static int rtimermax, rtimercnt;
151
152	static void
153	upheap (struct ev_timer **timers, int k)
154	{
155	struct ev_timer *w = timers [k];
156
157	while (k && timers [k >> 1]->at > w->at)
158	{
159	timers [k] = timers [k >> 1];
160	timers [k]->active = k + 1;
161	k >>= 1;
162	}
163
164	timers [k] = w;
165	timers [k]->active = k + 1;
166
167	}
168
169	static void
170	downheap (struct ev_timer **timers, int N, int k)
171	{
172	struct ev_timer *w = timers [k];
173
174	while (k < (N >> 1))
175	{
176	int j = k << 1;
177
178	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
179	++j;
180
181	if (w->at <= timers [j]->at)
182	break;
183
184	timers [k] = timers [j];
185	timers [k]->active = k + 1;
186	k = j;
187	}
188
189	timers [k] = w;
190	timers [k]->active = k + 1;
191	}
192
193	/*****************************************************************************/
194
195	typedef struct
196	{
197	struct ev_signal *head;
198	sig_atomic_t gotsig;
199	} ANSIG;	769	} ANSIG;
200		770
201	static ANSIG *signals;	771	static ANSIG *signals;
202	static int signalmax;	772	static int signalmax;
203		773
204	static int sigpipe [2];	774	static EV_ATOMIC_T gotsig;
205	static sig_atomic_t gotsig;
206	static struct ev_io sigev;
207		775
208	static void	776	void inline_size
209	signals_init (ANSIG *base, int count)	777	signals_init (ANSIG *base, int count)
210	{	778	{
211	while (count--)	779	while (count--)
212	{	780	{
213	base->head = 0;	781	base->head = 0;
214	base->gotsig = 0;	782	base->gotsig = 0;
		783
215	++base;	784	++base;
216	}	785	}
217	}	786	}
218		787
		788	/*****************************************************************************/
		789
		790	void inline_speed
		791	fd_intern (int fd)
		792	{
		793	#ifdef _WIN32
		794	int arg = 1;
		795	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		796	#else
		797	fcntl (fd, F_SETFD, FD_CLOEXEC);
		798	fcntl (fd, F_SETFL, O_NONBLOCK);
		799	#endif
		800	}
		801
		802	static void noinline
		803	evpipe_init (EV_P)
		804	{
		805	if (!ev_is_active (&pipeev))
		806	{
		807	while (pipe (evpipe))
		808	syserr ("(libev) error creating signal/async pipe");
		809
		810	fd_intern (evpipe [0]);
		811	fd_intern (evpipe [1]);
		812
		813	ev_io_set (&pipeev, evpipe [0], EV_READ);
		814	ev_io_start (EV_A_ &pipeev);
		815	ev_unref (EV_A); /* watcher should not keep loop alive */
		816	}
		817	}
		818
		819	void inline_size
		820	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		821	{
		822	if (!*flag)
		823	{
		824	int old_errno = errno; /* save errno because write might clobber it */
		825
		826	*flag = 1;
		827	write (evpipe [1], &old_errno, 1);
		828
		829	errno = old_errno;
		830	}
		831	}
		832
219	static void	833	static void
		834	pipecb (EV_P_ ev_io *iow, int revents)
		835	{
		836	{
		837	int dummy;
		838	read (evpipe [0], &dummy, 1);
		839	}
		840
		841	if (gotsig && ev_is_default_loop (EV_A))
		842	{
		843	int signum;
		844	gotsig = 0;
		845
		846	for (signum = signalmax; signum--; )
		847	if (signals [signum].gotsig)
		848	ev_feed_signal_event (EV_A_ signum + 1);
		849	}
		850
		851	#if EV_ASYNC_ENABLE
		852	if (gotasync)
		853	{
		854	int i;
		855	gotasync = 0;
		856
		857	for (i = asynccnt; i--; )
		858	if (asyncs [i]->sent)
		859	{
		860	asyncs [i]->sent = 0;
		861	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		862	}
		863	}
		864	#endif
		865	}
		866
		867	/*****************************************************************************/
		868
		869	static void
220	sighandler (int signum)	870	ev_sighandler (int signum)
221	{	871	{
		872	#if EV_MULTIPLICITY
		873	struct ev_loop *loop = &default_loop_struct;
		874	#endif
		875
		876	#if _WIN32
		877	signal (signum, ev_sighandler);
		878	#endif
		879
222	signals [signum - 1].gotsig = 1;	880	signals [signum - 1].gotsig = 1;
		881	evpipe_write (EV_A_ &gotsig);
		882	}
223		883
224	if (!gotsig)	884	void noinline
		885	ev_feed_signal_event (EV_P_ int signum)
		886	{
		887	WL w;
		888
		889	#if EV_MULTIPLICITY
		890	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		891	#endif
		892
		893	--signum;
		894
		895	if (signum < 0 || signum >= signalmax)
		896	return;
		897
		898	signals [signum].gotsig = 0;
		899
		900	for (w = signals [signum].head; w; w = w->next)
		901	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		902	}
		903
		904	/*****************************************************************************/
		905
		906	static WL childs [EV_PID_HASHSIZE];
		907
		908	#ifndef _WIN32
		909
		910	static ev_signal childev;
		911
		912	#ifndef WIFCONTINUED
		913	# define WIFCONTINUED(status) 0
		914	#endif
		915
		916	void inline_speed
		917	child_reap (EV_P_ int chain, int pid, int status)
		918	{
		919	ev_child *w;
		920	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		921
		922	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		923	{
		924	if ((w->pid == pid || !w->pid)
		925	&& (!traced || (w->flags & 1)))
		926	{
		927	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		928	w->rpid = pid;
		929	w->rstatus = status;
		930	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		931	}
		932	}
		933	}
		934
		935	#ifndef WCONTINUED
		936	# define WCONTINUED 0
		937	#endif
		938
		939	static void
		940	childcb (EV_P_ ev_signal *sw, int revents)
		941	{
		942	int pid, status;
		943
		944	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		945	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		946	if (!WCONTINUED
		947	|| errno != EINVAL
		948	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		949	return;
		950
		951	/* make sure we are called again until all children have been reaped */
		952	/* we need to do it this way so that the callback gets called before we continue */
		953	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		954
		955	child_reap (EV_A_ pid, pid, status);
		956	if (EV_PID_HASHSIZE > 1)
		957	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		958	}
		959
		960	#endif
		961
		962	/*****************************************************************************/
		963
		964	#if EV_USE_PORT
		965	# include "ev_port.c"
		966	#endif
		967	#if EV_USE_KQUEUE
		968	# include "ev_kqueue.c"
		969	#endif
		970	#if EV_USE_EPOLL
		971	# include "ev_epoll.c"
		972	#endif
		973	#if EV_USE_POLL
		974	# include "ev_poll.c"
		975	#endif
		976	#if EV_USE_SELECT
		977	# include "ev_select.c"
		978	#endif
		979
		980	int
		981	ev_version_major (void)
		982	{
		983	return EV_VERSION_MAJOR;
		984	}
		985
		986	int
		987	ev_version_minor (void)
		988	{
		989	return EV_VERSION_MINOR;
		990	}
		991
		992	/* return true if we are running with elevated privileges and should ignore env variables */
		993	int inline_size
		994	enable_secure (void)
		995	{
		996	#ifdef _WIN32
		997	return 0;
		998	#else
		999	return getuid () != geteuid ()
		1000	|| getgid () != getegid ();
		1001	#endif
		1002	}
		1003
		1004	unsigned int
		1005	ev_supported_backends (void)
		1006	{
		1007	unsigned int flags = 0;
		1008
		1009	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1010	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1011	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1012	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1013	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1014
		1015	return flags;
		1016	}
		1017
		1018	unsigned int
		1019	ev_recommended_backends (void)
		1020	{
		1021	unsigned int flags = ev_supported_backends ();
		1022
		1023	#ifndef __NetBSD__
		1024	/* kqueue is borked on everything but netbsd apparently */
		1025	/* it usually doesn't work correctly on anything but sockets and pipes */
		1026	flags &= ~EVBACKEND_KQUEUE;
		1027	#endif
		1028	#ifdef __APPLE__
		1029	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1030	flags &= ~EVBACKEND_POLL;
		1031	#endif
		1032
		1033	return flags;
		1034	}
		1035
		1036	unsigned int
		1037	ev_embeddable_backends (void)
		1038	{
		1039	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1040
		1041	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1042	/* please fix it and tell me how to detect the fix */
		1043	flags &= ~EVBACKEND_EPOLL;
		1044
		1045	return flags;
		1046	}
		1047
		1048	unsigned int
		1049	ev_backend (EV_P)
		1050	{
		1051	return backend;
		1052	}
		1053
		1054	unsigned int
		1055	ev_loop_count (EV_P)
		1056	{
		1057	return loop_count;
		1058	}
		1059
		1060	void
		1061	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1062	{
		1063	io_blocktime = interval;
		1064	}
		1065
		1066	void
		1067	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1068	{
		1069	timeout_blocktime = interval;
		1070	}
		1071
		1072	static void noinline
		1073	loop_init (EV_P_ unsigned int flags)
		1074	{
		1075	if (!backend)
		1076	{
		1077	#if EV_USE_MONOTONIC
225	{	1078	{
		1079	struct timespec ts;
		1080	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1081	have_monotonic = 1;
		1082	}
		1083	#endif
		1084
		1085	ev_rt_now = ev_time ();
		1086	mn_now = get_clock ();
		1087	now_floor = mn_now;
		1088	rtmn_diff = ev_rt_now - mn_now;
		1089
		1090	io_blocktime = 0.;
		1091	timeout_blocktime = 0.;
		1092	backend = 0;
		1093	backend_fd = -1;
		1094	gotasync = 0;
		1095	#if EV_USE_INOTIFY
		1096	fs_fd = -2;
		1097	#endif
		1098
		1099	/* pid check not overridable via env */
		1100	#ifndef _WIN32
		1101	if (flags & EVFLAG_FORKCHECK)
		1102	curpid = getpid ();
		1103	#endif
		1104
		1105	if (!(flags & EVFLAG_NOENV)
		1106	&& !enable_secure ()
		1107	&& getenv ("LIBEV_FLAGS"))
		1108	flags = atoi (getenv ("LIBEV_FLAGS"));
		1109
		1110	if (!(flags & 0x0000ffffUL))
		1111	flags |= ev_recommended_backends ();
		1112
		1113	#if EV_USE_PORT
		1114	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1115	#endif
		1116	#if EV_USE_KQUEUE
		1117	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1118	#endif
		1119	#if EV_USE_EPOLL
		1120	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1121	#endif
		1122	#if EV_USE_POLL
		1123	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1124	#endif
		1125	#if EV_USE_SELECT
		1126	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1127	#endif
		1128
		1129	ev_init (&pipeev, pipecb);
		1130	ev_set_priority (&pipeev, EV_MAXPRI);
		1131	}
		1132	}
		1133
		1134	static void noinline
		1135	loop_destroy (EV_P)
		1136	{
		1137	int i;
		1138
		1139	if (ev_is_active (&pipeev))
		1140	{
		1141	ev_ref (EV_A); /* signal watcher */
		1142	ev_io_stop (EV_A_ &pipeev);
		1143
		1144	close (evpipe [0]); evpipe [0] = 0;
		1145	close (evpipe [1]); evpipe [1] = 0;
		1146	}
		1147
		1148	#if EV_USE_INOTIFY
		1149	if (fs_fd >= 0)
		1150	close (fs_fd);
		1151	#endif
		1152
		1153	if (backend_fd >= 0)
		1154	close (backend_fd);
		1155
		1156	#if EV_USE_PORT
		1157	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1158	#endif
		1159	#if EV_USE_KQUEUE
		1160	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1161	#endif
		1162	#if EV_USE_EPOLL
		1163	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1164	#endif
		1165	#if EV_USE_POLL
		1166	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1167	#endif
		1168	#if EV_USE_SELECT
		1169	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1170	#endif
		1171
		1172	for (i = NUMPRI; i--; )
		1173	{
		1174	array_free (pending, [i]);
		1175	#if EV_IDLE_ENABLE
		1176	array_free (idle, [i]);
		1177	#endif
		1178	}
		1179
		1180	ev_free (anfds); anfdmax = 0;
		1181
		1182	/* have to use the microsoft-never-gets-it-right macro */
		1183	array_free (fdchange, EMPTY);
		1184	array_free (timer, EMPTY);
		1185	#if EV_PERIODIC_ENABLE
		1186	array_free (periodic, EMPTY);
		1187	#endif
		1188	#if EV_FORK_ENABLE
		1189	array_free (fork, EMPTY);
		1190	#endif
		1191	array_free (prepare, EMPTY);
		1192	array_free (check, EMPTY);
		1193	#if EV_ASYNC_ENABLE
		1194	array_free (async, EMPTY);
		1195	#endif
		1196
		1197	backend = 0;
		1198	}
		1199
		1200	void inline_size infy_fork (EV_P);
		1201
		1202	void inline_size
		1203	loop_fork (EV_P)
		1204	{
		1205	#if EV_USE_PORT
		1206	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1207	#endif
		1208	#if EV_USE_KQUEUE
		1209	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1210	#endif
		1211	#if EV_USE_EPOLL
		1212	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1213	#endif
		1214	#if EV_USE_INOTIFY
		1215	infy_fork (EV_A);
		1216	#endif
		1217
		1218	if (ev_is_active (&pipeev))
		1219	{
		1220	/* this "locks" the handlers against writing to the pipe */
		1221	/* while we modify the fd vars */
226	gotsig = 1;	1222	gotsig = 1;
227	write (sigpipe [1], &gotsig, 1);	1223	#if EV_ASYNC_ENABLE
		1224	gotasync = 1;
		1225	#endif
		1226
		1227	ev_ref (EV_A);
		1228	ev_io_stop (EV_A_ &pipeev);
		1229	close (evpipe [0]);
		1230	close (evpipe [1]);
		1231
		1232	evpipe_init (EV_A);
		1233	/* now iterate over everything, in case we missed something */
		1234	pipecb (EV_A_ &pipeev, EV_READ);
		1235	}
		1236
		1237	postfork = 0;
		1238	}
		1239
		1240	#if EV_MULTIPLICITY
		1241	struct ev_loop *
		1242	ev_loop_new (unsigned int flags)
		1243	{
		1244	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1245
		1246	memset (loop, 0, sizeof (struct ev_loop));
		1247
		1248	loop_init (EV_A_ flags);
		1249
		1250	if (ev_backend (EV_A))
		1251	return loop;
		1252
		1253	return 0;
		1254	}
		1255
		1256	void
		1257	ev_loop_destroy (EV_P)
		1258	{
		1259	loop_destroy (EV_A);
		1260	ev_free (loop);
		1261	}
		1262
		1263	void
		1264	ev_loop_fork (EV_P)
		1265	{
		1266	postfork = 1; /* must be in line with ev_default_fork */
		1267	}
		1268
		1269	#endif
		1270
		1271	#if EV_MULTIPLICITY
		1272	struct ev_loop *
		1273	ev_default_loop_init (unsigned int flags)
		1274	#else
		1275	int
		1276	ev_default_loop (unsigned int flags)
		1277	#endif
		1278	{
		1279	if (!ev_default_loop_ptr)
228	}	1280	{
229	}	1281	#if EV_MULTIPLICITY
		1282	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1283	#else
		1284	ev_default_loop_ptr = 1;
		1285	#endif
230		1286
231	static void	1287	loop_init (EV_A_ flags);
232	sigcb (struct ev_io *iow, int revents)	1288
		1289	if (ev_backend (EV_A))
		1290	{
		1291	#ifndef _WIN32
		1292	ev_signal_init (&childev, childcb, SIGCHLD);
		1293	ev_set_priority (&childev, EV_MAXPRI);
		1294	ev_signal_start (EV_A_ &childev);
		1295	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1296	#endif
		1297	}
		1298	else
		1299	ev_default_loop_ptr = 0;
		1300	}
		1301
		1302	return ev_default_loop_ptr;
		1303	}
		1304
		1305	void
		1306	ev_default_destroy (void)
233	{	1307	{
234	struct ev_signal *w;	1308	#if EV_MULTIPLICITY
		1309	struct ev_loop *loop = ev_default_loop_ptr;
		1310	#endif
		1311
		1312	#ifndef _WIN32
		1313	ev_ref (EV_A); /* child watcher */
		1314	ev_signal_stop (EV_A_ &childev);
		1315	#endif
		1316
		1317	loop_destroy (EV_A);
		1318	}
		1319
		1320	void
		1321	ev_default_fork (void)
		1322	{
		1323	#if EV_MULTIPLICITY
		1324	struct ev_loop *loop = ev_default_loop_ptr;
		1325	#endif
		1326
		1327	if (backend)
		1328	postfork = 1; /* must be in line with ev_loop_fork */
		1329	}
		1330
		1331	/*****************************************************************************/
		1332
		1333	void
		1334	ev_invoke (EV_P_ void *w, int revents)
		1335	{
		1336	EV_CB_INVOKE ((W)w, revents);
		1337	}
		1338
		1339	void inline_speed
		1340	call_pending (EV_P)
		1341	{
235	int sig;	1342	int pri;
236		1343
237	gotsig = 0;	1344	for (pri = NUMPRI; pri--; )
238	read (sigpipe [0], &revents, 1);	1345	while (pendingcnt [pri])
239
240	for (sig = signalmax; sig--; )
241	if (signals [sig].gotsig)
242	{	1346	{
243	signals [sig].gotsig = 0;	1347	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
244		1348
245	for (w = signals [sig].head; w; w = w->next)	1349	if (expect_true (p->w))
246	event ((struct ev_watcher *)w, EV_SIGNAL);	1350	{
		1351	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1352
		1353	p->w->pending = 0;
		1354	EV_CB_INVOKE (p->w, p->events);
		1355	}
247	}	1356	}
248	}	1357	}
249		1358
250	static void	1359	void inline_size
251	siginit (void)	1360	timers_reify (EV_P)
252	{	1361	{
253	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
254	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
255
256	/* rather than sort out wether we really need nb, set it */
257	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
258	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
259
260	evio_set (&sigev, sigpipe [0], EV_READ);
261	evio_start (&sigev);
262	}
263
264	/*****************************************************************************/
265
266	#if HAVE_EPOLL
267	# include "ev_epoll.c"
268	#endif
269	#if HAVE_SELECT
270	# include "ev_select.c"
271	#endif
272
273	int ev_init (int flags)
274	{
275	#if HAVE_MONOTONIC
276	{
277	struct timespec ts;
278	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
279	have_monotonic = 1;
280	}
281	#endif
282
283	ev_now = ev_time ();
284	now = get_clock ();
285	diff = ev_now - now;
286
287	if (pipe (sigpipe))
288	return 0;
289
290	ev_method = EVMETHOD_NONE;
291	#if HAVE_EPOLL
292	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
293	#endif
294	#if HAVE_SELECT
295	if (ev_method == EVMETHOD_NONE) select_init (flags);
296	#endif
297
298	if (ev_method)
299	{
300	evw_init (&sigev, sigcb, 0);
301	siginit ();
302	}
303
304	return ev_method;
305	}
306
307	/*****************************************************************************/
308
309	void ev_prefork (void)
310	{
311	}
312
313	void ev_postfork_parent (void)
314	{
315	}
316
317	void ev_postfork_child (void)
318	{
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_EPOLL)
321	epoll_postfork_child ();
322	#endif
323
324	evio_stop (&sigev);
325	close (sigpipe [0]);
326	close (sigpipe [1]);
327	pipe (sigpipe);
328	siginit ();
329	}
330
331	/*****************************************************************************/
332
333	static ev_hook hooks [EVHOOK_NUM];
334
335	void
336	ev_hook_register (int type, ev_hook hook)
337	{
338	hooks [type] = hook;
339	}
340
341	void
342	ev_hook_unregister (int type, ev_hook hook)
343	{
344	hooks [type] = 0;
345	}
346
347	static void
348	hook_call (int type)
349	{
350	if (hooks [type])
351	hooks [type] ();
352	}
353
354	static void
355	fd_reify (void)
356	{
357	int i;
358
359	for (i = 0; i < fdchangecnt; ++i)
360	{
361	int fd = fdchanges [i];
362	ANFD *anfd = anfds + fd;
363	struct ev_io *w;
364
365	int wev = 0;
366
367	for (w = anfd->head; w; w = w->next)
368	wev |= w->events;
369
370	if (anfd->wev != wev)
371	{
372	method_modify (fd, anfd->wev, wev);
373	anfd->wev = wev;
374	}
375	}
376
377	fdchangecnt = 0;
378	}
379
380	static void
381	call_pending ()
382	{
383	int i;
384
385	for (i = 0; i < pendingcnt; ++i)
386	{
387	ANPENDING *p = pendings + i;
388
389	if (p->w)
390	{
391	p->w->pending = 0;
392	p->w->cb (p->w, p->events);
393	}
394	}
395
396	pendingcnt = 0;
397	}
398
399	static void
400	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)
401	{
402	while (timercnt && timers [0]->at <= now)	1362	while (timercnt && ((WT)timers [0])->at <= mn_now)
403	{	1363	{
404	struct ev_timer *w = timers [0];	1364	ev_timer *w = (ev_timer *)timers [0];
		1365
		1366	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
405		1367
406	/* first reschedule or stop timer */	1368	/* first reschedule or stop timer */
407	if (w->repeat)	1369	if (w->repeat)
408	{	1370	{
409	if (w->is_abs)	1371	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
410	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1372
411	else
412	w->at = now + w->repeat;	1373	((WT)w)->at += w->repeat;
413		1374	if (((WT)w)->at < mn_now)
414	assert (w->at > now);	1375	((WT)w)->at = mn_now;
415		1376
416	downheap (timers, timercnt, 0);	1377	downheap (timers, timercnt, 0);
417	}	1378	}
418	else	1379	else
		1380	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1381
		1382	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1383	}
		1384	}
		1385
		1386	#if EV_PERIODIC_ENABLE
		1387	void inline_size
		1388	periodics_reify (EV_P)
		1389	{
		1390	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1391	{
		1392	ev_periodic *w = (ev_periodic *)periodics [0];
		1393
		1394	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1395
		1396	/* first reschedule or stop timer */
		1397	if (w->reschedule_cb)
419	{	1398	{
420	evtimer_stop (w); /* nonrepeating: stop timer */	1399	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
421	--timercnt; /* maybe pass by reference instead? */	1400	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1401	downheap (periodics, periodiccnt, 0);
422	}	1402	}
		1403	else if (w->interval)
		1404	{
		1405	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1406	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1407	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1408	downheap (periodics, periodiccnt, 0);
		1409	}
		1410	else
		1411	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
423		1412
424	event ((struct ev_watcher *)w, EV_TIMEOUT);	1413	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
425	}	1414	}
426	}	1415	}
427		1416
428	static void	1417	static void noinline
429	time_update ()	1418	periodics_reschedule (EV_P)
430	{	1419	{
431	int i;	1420	int i;
432	ev_now = ev_time ();
433		1421
434	if (have_monotonic)	1422	/* adjust periodics after time jump */
		1423	for (i = 0; i < periodiccnt; ++i)
		1424	{
		1425	ev_periodic *w = (ev_periodic *)periodics [i];
		1426
		1427	if (w->reschedule_cb)
		1428	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1429	else if (w->interval)
		1430	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
435	{	1431	}
436	ev_tstamp odiff = diff;
437		1432
438	/* detecting time jumps is much more difficult */	1433	/* now rebuild the heap */
439	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1434	for (i = periodiccnt >> 1; i--; )
		1435	downheap (periodics, periodiccnt, i);
		1436	}
		1437	#endif
		1438
		1439	#if EV_IDLE_ENABLE
		1440	void inline_size
		1441	idle_reify (EV_P)
		1442	{
		1443	if (expect_false (idleall))
		1444	{
		1445	int pri;
		1446
		1447	for (pri = NUMPRI; pri--; )
440	{	1448	{
		1449	if (pendingcnt [pri])
		1450	break;
		1451
		1452	if (idlecnt [pri])
		1453	{
		1454	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1455	break;
		1456	}
		1457	}
		1458	}
		1459	}
		1460	#endif
		1461
		1462	void inline_speed
		1463	time_update (EV_P_ ev_tstamp max_block)
		1464	{
		1465	int i;
		1466
		1467	#if EV_USE_MONOTONIC
		1468	if (expect_true (have_monotonic))
		1469	{
		1470	ev_tstamp odiff = rtmn_diff;
		1471
441	now = get_clock ();	1472	mn_now = get_clock ();
		1473
		1474	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1475	/* interpolate in the meantime */
		1476	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1477	{
		1478	ev_rt_now = rtmn_diff + mn_now;
		1479	return;
		1480	}
		1481
		1482	now_floor = mn_now;
		1483	ev_rt_now = ev_time ();
		1484
		1485	/* loop a few times, before making important decisions.
		1486	* on the choice of "4": one iteration isn't enough,
		1487	* in case we get preempted during the calls to
		1488	* ev_time and get_clock. a second call is almost guaranteed
		1489	* to succeed in that case, though. and looping a few more times
		1490	* doesn't hurt either as we only do this on time-jumps or
		1491	* in the unlikely event of having been preempted here.
		1492	*/
		1493	for (i = 4; --i; )
		1494	{
442	diff = ev_now - now;	1495	rtmn_diff = ev_rt_now - mn_now;
443		1496
444	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1497	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
445	return; /* all is well */	1498	return; /* all is well */
446		1499
447	ev_now = ev_time ();	1500	ev_rt_now = ev_time ();
		1501	mn_now = get_clock ();
		1502	now_floor = mn_now;
448	}	1503	}
449		1504
450	/* time jump detected, reschedule atimers */	1505	# if EV_PERIODIC_ENABLE
451	for (i = 0; i < atimercnt; ++i)	1506	periodics_reschedule (EV_A);
		1507	# endif
		1508	/* no timer adjustment, as the monotonic clock doesn't jump */
		1509	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1510	}
		1511	else
		1512	#endif
		1513	{
		1514	ev_rt_now = ev_time ();
		1515
		1516	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
452	{	1517	{
453	struct ev_timer *w = atimers [i];	1518	#if EV_PERIODIC_ENABLE
454	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1519	periodics_reschedule (EV_A);
		1520	#endif
		1521	/* adjust timers. this is easy, as the offset is the same for all of them */
		1522	for (i = 0; i < timercnt; ++i)
		1523	((WT)timers [i])->at += ev_rt_now - mn_now;
455	}	1524	}
456	}
457	else
458	{
459	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
460	/* time jump detected, adjust rtimers */
461	for (i = 0; i < rtimercnt; ++i)
462	rtimers [i]->at += ev_now - now;
463		1525
464	now = ev_now;	1526	mn_now = ev_rt_now;
465	}	1527	}
466	}	1528	}
467		1529
468	int ev_loop_done;	1530	void
		1531	ev_ref (EV_P)
		1532	{
		1533	++activecnt;
		1534	}
469		1535
		1536	void
		1537	ev_unref (EV_P)
		1538	{
		1539	--activecnt;
		1540	}
		1541
		1542	static int loop_done;
		1543
		1544	void
470	void ev_loop (int flags)	1545	ev_loop (EV_P_ int flags)
471	{	1546	{
472	double block;	1547	loop_done = EVUNLOOP_CANCEL;
473	ev_loop_done = flags & EVLOOP_ONESHOT;	1548
		1549	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
474		1550
475	do	1551	do
476	{	1552	{
477	hook_call (EVHOOK_PREPOLL);	1553	#ifndef _WIN32
		1554	if (expect_false (curpid)) /* penalise the forking check even more */
		1555	if (expect_false (getpid () != curpid))
		1556	{
		1557	curpid = getpid ();
		1558	postfork = 1;
		1559	}
		1560	#endif
		1561
		1562	#if EV_FORK_ENABLE
		1563	/* we might have forked, so queue fork handlers */
		1564	if (expect_false (postfork))
		1565	if (forkcnt)
		1566	{
		1567	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1568	call_pending (EV_A);
		1569	}
		1570	#endif
		1571
		1572	/* queue prepare watchers (and execute them) */
		1573	if (expect_false (preparecnt))
		1574	{
		1575	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1576	call_pending (EV_A);
		1577	}
		1578
		1579	if (expect_false (!activecnt))
		1580	break;
		1581
		1582	/* we might have forked, so reify kernel state if necessary */
		1583	if (expect_false (postfork))
		1584	loop_fork (EV_A);
478		1585
479	/* update fd-related kernel structures */	1586	/* update fd-related kernel structures */
480	fd_reify ();	1587	fd_reify (EV_A);
481		1588
482	/* calculate blocking time */	1589	/* calculate blocking time */
483	if (flags & EVLOOP_NONBLOCK)	1590	{
484	block = 0.;	1591	ev_tstamp waittime = 0.;
485	else	1592	ev_tstamp sleeptime = 0.;
		1593
		1594	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
486	{	1595	{
		1596	/* update time to cancel out callback processing overhead */
		1597	time_update (EV_A_ 1e100);
		1598
487	block = MAX_BLOCKTIME;	1599	waittime = MAX_BLOCKTIME;
488		1600
489	if (rtimercnt)	1601	if (timercnt)
490	{	1602	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1603	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
492	if (block > to) block = to;	1604	if (waittime > to) waittime = to;
493	}	1605	}
494		1606
		1607	#if EV_PERIODIC_ENABLE
495	if (atimercnt)	1608	if (periodiccnt)
496	{	1609	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1610	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
498	if (block > to) block = to;	1611	if (waittime > to) waittime = to;
499	}	1612	}
		1613	#endif
500		1614
501	if (block < 0.) block = 0.;	1615	if (expect_false (waittime < timeout_blocktime))
		1616	waittime = timeout_blocktime;
		1617
		1618	sleeptime = waittime - backend_fudge;
		1619
		1620	if (expect_true (sleeptime > io_blocktime))
		1621	sleeptime = io_blocktime;
		1622
		1623	if (sleeptime)
		1624	{
		1625	ev_sleep (sleeptime);
		1626	waittime -= sleeptime;
		1627	}
502	}	1628	}
503		1629
504	method_poll (block);	1630	++loop_count;
		1631	backend_poll (EV_A_ waittime);
505		1632
506	/* update ev_now, do magic */	1633	/* update ev_rt_now, do magic */
507	time_update ();	1634	time_update (EV_A_ waittime + sleeptime);
		1635	}
508		1636
509	hook_call (EVHOOK_POSTPOLL);
510
511	/* put pending timers into pendign queue and reschedule them */	1637	/* queue pending timers and reschedule them */
512	/* absolute timers first */	1638	timers_reify (EV_A); /* relative timers called last */
513	timers_reify (atimers, atimercnt, ev_now);	1639	#if EV_PERIODIC_ENABLE
514	/* relative timers second */	1640	periodics_reify (EV_A); /* absolute timers called first */
515	timers_reify (rtimers, rtimercnt, now);	1641	#endif
516		1642
		1643	#if EV_IDLE_ENABLE
		1644	/* queue idle watchers unless other events are pending */
		1645	idle_reify (EV_A);
		1646	#endif
		1647
		1648	/* queue check watchers, to be executed first */
		1649	if (expect_false (checkcnt))
		1650	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1651
517	call_pending ();	1652	call_pending (EV_A);
518	}	1653	}
519	while (!ev_loop_done);	1654	while (expect_true (
		1655	activecnt
		1656	&& !loop_done
		1657	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1658	));
		1659
		1660	if (loop_done == EVUNLOOP_ONE)
		1661	loop_done = EVUNLOOP_CANCEL;
		1662	}
		1663
		1664	void
		1665	ev_unloop (EV_P_ int how)
		1666	{
		1667	loop_done = how;
520	}	1668	}
521		1669
522	/*****************************************************************************/	1670	/*****************************************************************************/
523		1671
524	static void	1672	void inline_size
525	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1673	wlist_add (WL *head, WL elem)
526	{	1674	{
527	elem->next = *head;	1675	elem->next = *head;
528	*head = elem;	1676	*head = elem;
529	}	1677	}
530		1678
531	static void	1679	void inline_size
532	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1680	wlist_del (WL *head, WL elem)
533	{	1681	{
534	while (*head)	1682	while (*head)
535	{	1683	{
536	if (*head == elem)	1684	if (*head == elem)
537	{	1685	{
…		…
541		1689
542	head = &(*head)->next;	1690	head = &(*head)->next;
543	}	1691	}
544	}	1692	}
545		1693
546	static void	1694	void inline_speed
547	ev_start (struct ev_watcher *w, int active)	1695	clear_pending (EV_P_ W w)
548	{	1696	{
		1697	if (w->pending)
		1698	{
		1699	pendings [ABSPRI (w)][w->pending - 1].w = 0;
549	w->pending = 0;	1700	w->pending = 0;
		1701	}
		1702	}
		1703
		1704	int
		1705	ev_clear_pending (EV_P_ void *w)
		1706	{
		1707	W w_ = (W)w;
		1708	int pending = w_->pending;
		1709
		1710	if (expect_true (pending))
		1711	{
		1712	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1713	w_->pending = 0;
		1714	p->w = 0;
		1715	return p->events;
		1716	}
		1717	else
		1718	return 0;
		1719	}
		1720
		1721	void inline_size
		1722	pri_adjust (EV_P_ W w)
		1723	{
		1724	int pri = w->priority;
		1725	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1726	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1727	w->priority = pri;
		1728	}
		1729
		1730	void inline_speed
		1731	ev_start (EV_P_ W w, int active)
		1732	{
		1733	pri_adjust (EV_A_ w);
550	w->active = active;	1734	w->active = active;
		1735	ev_ref (EV_A);
551	}	1736	}
552		1737
553	static void	1738	void inline_size
554	ev_stop (struct ev_watcher *w)	1739	ev_stop (EV_P_ W w)
555	{	1740	{
556	if (w->pending)	1741	ev_unref (EV_A);
557	pendings [w->pending - 1].w = 0;
558
559	w->active = 0;	1742	w->active = 0;
560	/* nop */
561	}	1743	}
562		1744
563	/*****************************************************************************/	1745	/*****************************************************************************/
564		1746
565	void	1747	void noinline
566	evio_start (struct ev_io *w)	1748	ev_io_start (EV_P_ ev_io *w)
		1749	{
		1750	int fd = w->fd;
		1751
		1752	if (expect_false (ev_is_active (w)))
		1753	return;
		1754
		1755	assert (("ev_io_start called with negative fd", fd >= 0));
		1756
		1757	ev_start (EV_A_ (W)w, 1);
		1758	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1759	wlist_add (&anfds[fd].head, (WL)w);
		1760
		1761	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1762	w->events &= ~EV_IOFDSET;
		1763	}
		1764
		1765	void noinline
		1766	ev_io_stop (EV_P_ ev_io *w)
		1767	{
		1768	clear_pending (EV_A_ (W)w);
		1769	if (expect_false (!ev_is_active (w)))
		1770	return;
		1771
		1772	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1773
		1774	wlist_del (&anfds[w->fd].head, (WL)w);
		1775	ev_stop (EV_A_ (W)w);
		1776
		1777	fd_change (EV_A_ w->fd, 1);
		1778	}
		1779
		1780	void noinline
		1781	ev_timer_start (EV_P_ ev_timer *w)
		1782	{
		1783	if (expect_false (ev_is_active (w)))
		1784	return;
		1785
		1786	((WT)w)->at += mn_now;
		1787
		1788	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1789
		1790	ev_start (EV_A_ (W)w, ++timercnt);
		1791	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1792	timers [timercnt - 1] = (WT)w;
		1793	upheap (timers, timercnt - 1);
		1794
		1795	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1796	}
		1797
		1798	void noinline
		1799	ev_timer_stop (EV_P_ ev_timer *w)
		1800	{
		1801	clear_pending (EV_A_ (W)w);
		1802	if (expect_false (!ev_is_active (w)))
		1803	return;
		1804
		1805	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1806
		1807	{
		1808	int active = ((W)w)->active;
		1809
		1810	if (expect_true (--active < --timercnt))
		1811	{
		1812	timers [active] = timers [timercnt];
		1813	adjustheap (timers, timercnt, active);
		1814	}
		1815	}
		1816
		1817	((WT)w)->at -= mn_now;
		1818
		1819	ev_stop (EV_A_ (W)w);
		1820	}
		1821
		1822	void noinline
		1823	ev_timer_again (EV_P_ ev_timer *w)
567	{	1824	{
568	if (ev_is_active (w))	1825	if (ev_is_active (w))
569	return;
570
571	int fd = w->fd;
572
573	ev_start ((struct ev_watcher *)w, 1);
574	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
575	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
576
577	++fdchangecnt;
578	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
579	fdchanges [fdchangecnt - 1] = fd;
580	}
581
582	void
583	evio_stop (struct ev_io *w)
584	{
585	if (!ev_is_active (w))
586	return;
587
588	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
589	ev_stop ((struct ev_watcher *)w);
590
591	++fdchangecnt;
592	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
593	fdchanges [fdchangecnt - 1] = w->fd;
594	}
595
596	void
597	evtimer_start (struct ev_timer *w)
598	{
599	if (ev_is_active (w))
600	return;
601
602	if (w->is_abs)
603	{	1826	{
604	/* this formula differs from the one in timer_reify becuse we do not round up */
605	if (w->repeat)	1827	if (w->repeat)
606	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1828	{
		1829	((WT)w)->at = mn_now + w->repeat;
		1830	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1831	}
		1832	else
		1833	ev_timer_stop (EV_A_ w);
		1834	}
		1835	else if (w->repeat)
		1836	{
		1837	w->at = w->repeat;
		1838	ev_timer_start (EV_A_ w);
		1839	}
		1840	}
607		1841
608	ev_start ((struct ev_watcher *)w, ++atimercnt);	1842	#if EV_PERIODIC_ENABLE
609	array_needsize (atimers, atimermax, atimercnt, );	1843	void noinline
610	atimers [atimercnt - 1] = w;	1844	ev_periodic_start (EV_P_ ev_periodic *w)
611	upheap (atimers, atimercnt - 1);	1845	{
		1846	if (expect_false (ev_is_active (w)))
		1847	return;
		1848
		1849	if (w->reschedule_cb)
		1850	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1851	else if (w->interval)
		1852	{
		1853	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1854	/* this formula differs from the one in periodic_reify because we do not always round up */
		1855	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
612	}	1856	}
613	else	1857	else
614	{	1858	((WT)w)->at = w->offset;
615	w->at += now;
616		1859
617	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1860	ev_start (EV_A_ (W)w, ++periodiccnt);
618	array_needsize (rtimers, rtimermax, rtimercnt, );	1861	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
619	rtimers [rtimercnt - 1] = w;	1862	periodics [periodiccnt - 1] = (WT)w;
620	upheap (rtimers, rtimercnt - 1);	1863	upheap (periodics, periodiccnt - 1);
621	}
622		1864
		1865	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
623	}	1866	}
624		1867
625	void	1868	void noinline
626	evtimer_stop (struct ev_timer *w)	1869	ev_periodic_stop (EV_P_ ev_periodic *w)
627	{	1870	{
		1871	clear_pending (EV_A_ (W)w);
628	if (!ev_is_active (w))	1872	if (expect_false (!ev_is_active (w)))
629	return;	1873	return;
630		1874
631	if (w->is_abs)	1875	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1876
632	{	1877	{
633	if (w->active < atimercnt--)	1878	int active = ((W)w)->active;
		1879
		1880	if (expect_true (--active < --periodiccnt))
634	{	1881	{
635	atimers [w->active - 1] = atimers [atimercnt];	1882	periodics [active] = periodics [periodiccnt];
636	downheap (atimers, atimercnt, w->active - 1);	1883	adjustheap (periodics, periodiccnt, active);
637	}	1884	}
638	}	1885	}
639	else
640	{
641	if (w->active < rtimercnt--)
642	{
643	rtimers [w->active - 1] = rtimers [rtimercnt];
644	downheap (rtimers, rtimercnt, w->active - 1);
645	}
646	}
647		1886
648	ev_stop ((struct ev_watcher *)w);	1887	ev_stop (EV_A_ (W)w);
649	}	1888	}
650		1889
651	void	1890	void noinline
		1891	ev_periodic_again (EV_P_ ev_periodic *w)
		1892	{
		1893	/* TODO: use adjustheap and recalculation */
		1894	ev_periodic_stop (EV_A_ w);
		1895	ev_periodic_start (EV_A_ w);
		1896	}
		1897	#endif
		1898
		1899	#ifndef SA_RESTART
		1900	# define SA_RESTART 0
		1901	#endif
		1902
		1903	void noinline
652	evsignal_start (struct ev_signal *w)	1904	ev_signal_start (EV_P_ ev_signal *w)
653	{	1905	{
		1906	#if EV_MULTIPLICITY
		1907	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1908	#endif
654	if (ev_is_active (w))	1909	if (expect_false (ev_is_active (w)))
655	return;	1910	return;
656		1911
657	ev_start ((struct ev_watcher *)w, 1);	1912	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1913
		1914	evpipe_init (EV_A);
		1915
		1916	{
		1917	#ifndef _WIN32
		1918	sigset_t full, prev;
		1919	sigfillset (&full);
		1920	sigprocmask (SIG_SETMASK, &full, &prev);
		1921	#endif
		1922
658	array_needsize (signals, signalmax, w->signum, signals_init);	1923	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
659	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);
660		1924
		1925	#ifndef _WIN32
		1926	sigprocmask (SIG_SETMASK, &prev, 0);
		1927	#endif
		1928	}
		1929
		1930	ev_start (EV_A_ (W)w, 1);
		1931	wlist_add (&signals [w->signum - 1].head, (WL)w);
		1932
661	if (!w->next)	1933	if (!((WL)w)->next)
662	{	1934	{
		1935	#if _WIN32
		1936	signal (w->signum, ev_sighandler);
		1937	#else
663	struct sigaction sa;	1938	struct sigaction sa;
664	sa.sa_handler = sighandler;	1939	sa.sa_handler = ev_sighandler;
665	sigfillset (&sa.sa_mask);	1940	sigfillset (&sa.sa_mask);
666	sa.sa_flags = 0;	1941	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
667	sigaction (w->signum, &sa, 0);	1942	sigaction (w->signum, &sa, 0);
		1943	#endif
668	}	1944	}
669	}	1945	}
670		1946
671	void	1947	void noinline
672	evsignal_stop (struct ev_signal *w)	1948	ev_signal_stop (EV_P_ ev_signal *w)
673	{	1949	{
		1950	clear_pending (EV_A_ (W)w);
674	if (!ev_is_active (w))	1951	if (expect_false (!ev_is_active (w)))
675	return;	1952	return;
676		1953
677	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1954	wlist_del (&signals [w->signum - 1].head, (WL)w);
678	ev_stop ((struct ev_watcher *)w);	1955	ev_stop (EV_A_ (W)w);
679		1956
680	if (!signals [w->signum - 1].head)	1957	if (!signals [w->signum - 1].head)
681	signal (w->signum, SIG_DFL);	1958	signal (w->signum, SIG_DFL);
682	}	1959	}
683		1960
		1961	void
		1962	ev_child_start (EV_P_ ev_child *w)
		1963	{
		1964	#if EV_MULTIPLICITY
		1965	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1966	#endif
		1967	if (expect_false (ev_is_active (w)))
		1968	return;
		1969
		1970	ev_start (EV_A_ (W)w, 1);
		1971	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1972	}
		1973
		1974	void
		1975	ev_child_stop (EV_P_ ev_child *w)
		1976	{
		1977	clear_pending (EV_A_ (W)w);
		1978	if (expect_false (!ev_is_active (w)))
		1979	return;
		1980
		1981	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1982	ev_stop (EV_A_ (W)w);
		1983	}
		1984
		1985	#if EV_STAT_ENABLE
		1986
		1987	# ifdef _WIN32
		1988	# undef lstat
		1989	# define lstat(a,b) _stati64 (a,b)
		1990	# endif
		1991
		1992	#define DEF_STAT_INTERVAL 5.0074891
		1993	#define MIN_STAT_INTERVAL 0.1074891
		1994
		1995	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1996
		1997	#if EV_USE_INOTIFY
		1998	# define EV_INOTIFY_BUFSIZE 8192
		1999
		2000	static void noinline
		2001	infy_add (EV_P_ ev_stat *w)
		2002	{
		2003	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		2004
		2005	if (w->wd < 0)
		2006	{
		2007	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2008
		2009	/* monitor some parent directory for speedup hints */
		2010	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2011	{
		2012	char path [4096];
		2013	strcpy (path, w->path);
		2014
		2015	do
		2016	{
		2017	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2018	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2019
		2020	char *pend = strrchr (path, '/');
		2021
		2022	if (!pend)
		2023	break; /* whoops, no '/', complain to your admin */
		2024
		2025	*pend = 0;
		2026	w->wd = inotify_add_watch (fs_fd, path, mask);
		2027	}
		2028	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2029	}
		2030	}
		2031	else
		2032	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2033
		2034	if (w->wd >= 0)
		2035	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2036	}
		2037
		2038	static void noinline
		2039	infy_del (EV_P_ ev_stat *w)
		2040	{
		2041	int slot;
		2042	int wd = w->wd;
		2043
		2044	if (wd < 0)
		2045	return;
		2046
		2047	w->wd = -2;
		2048	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2049	wlist_del (&fs_hash [slot].head, (WL)w);
		2050
		2051	/* remove this watcher, if others are watching it, they will rearm */
		2052	inotify_rm_watch (fs_fd, wd);
		2053	}
		2054
		2055	static void noinline
		2056	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2057	{
		2058	if (slot < 0)
		2059	/* overflow, need to check for all hahs slots */
		2060	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2061	infy_wd (EV_A_ slot, wd, ev);
		2062	else
		2063	{
		2064	WL w_;
		2065
		2066	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2067	{
		2068	ev_stat *w = (ev_stat *)w_;
		2069	w_ = w_->next; /* lets us remove this watcher and all before it */
		2070
		2071	if (w->wd == wd || wd == -1)
		2072	{
		2073	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2074	{
		2075	w->wd = -1;
		2076	infy_add (EV_A_ w); /* re-add, no matter what */
		2077	}
		2078
		2079	stat_timer_cb (EV_A_ &w->timer, 0);
		2080	}
		2081	}
		2082	}
		2083	}
		2084
		2085	static void
		2086	infy_cb (EV_P_ ev_io *w, int revents)
		2087	{
		2088	char buf [EV_INOTIFY_BUFSIZE];
		2089	struct inotify_event *ev = (struct inotify_event *)buf;
		2090	int ofs;
		2091	int len = read (fs_fd, buf, sizeof (buf));
		2092
		2093	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2094	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2095	}
		2096
		2097	void inline_size
		2098	infy_init (EV_P)
		2099	{
		2100	if (fs_fd != -2)
		2101	return;
		2102
		2103	fs_fd = inotify_init ();
		2104
		2105	if (fs_fd >= 0)
		2106	{
		2107	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2108	ev_set_priority (&fs_w, EV_MAXPRI);
		2109	ev_io_start (EV_A_ &fs_w);
		2110	}
		2111	}
		2112
		2113	void inline_size
		2114	infy_fork (EV_P)
		2115	{
		2116	int slot;
		2117
		2118	if (fs_fd < 0)
		2119	return;
		2120
		2121	close (fs_fd);
		2122	fs_fd = inotify_init ();
		2123
		2124	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2125	{
		2126	WL w_ = fs_hash [slot].head;
		2127	fs_hash [slot].head = 0;
		2128
		2129	while (w_)
		2130	{
		2131	ev_stat *w = (ev_stat *)w_;
		2132	w_ = w_->next; /* lets us add this watcher */
		2133
		2134	w->wd = -1;
		2135
		2136	if (fs_fd >= 0)
		2137	infy_add (EV_A_ w); /* re-add, no matter what */
		2138	else
		2139	ev_timer_start (EV_A_ &w->timer);
		2140	}
		2141
		2142	}
		2143	}
		2144
		2145	#endif
		2146
		2147	void
		2148	ev_stat_stat (EV_P_ ev_stat *w)
		2149	{
		2150	if (lstat (w->path, &w->attr) < 0)
		2151	w->attr.st_nlink = 0;
		2152	else if (!w->attr.st_nlink)
		2153	w->attr.st_nlink = 1;
		2154	}
		2155
		2156	static void noinline
		2157	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2158	{
		2159	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2160
		2161	/* we copy this here each the time so that */
		2162	/* prev has the old value when the callback gets invoked */
		2163	w->prev = w->attr;
		2164	ev_stat_stat (EV_A_ w);
		2165
		2166	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2167	if (
		2168	w->prev.st_dev != w->attr.st_dev
		2169	|| w->prev.st_ino != w->attr.st_ino
		2170	|| w->prev.st_mode != w->attr.st_mode
		2171	|| w->prev.st_nlink != w->attr.st_nlink
		2172	|| w->prev.st_uid != w->attr.st_uid
		2173	|| w->prev.st_gid != w->attr.st_gid
		2174	|| w->prev.st_rdev != w->attr.st_rdev
		2175	|| w->prev.st_size != w->attr.st_size
		2176	|| w->prev.st_atime != w->attr.st_atime
		2177	|| w->prev.st_mtime != w->attr.st_mtime
		2178	|| w->prev.st_ctime != w->attr.st_ctime
		2179	) {
		2180	#if EV_USE_INOTIFY
		2181	infy_del (EV_A_ w);
		2182	infy_add (EV_A_ w);
		2183	ev_stat_stat (EV_A_ w); /* avoid race... */
		2184	#endif
		2185
		2186	ev_feed_event (EV_A_ w, EV_STAT);
		2187	}
		2188	}
		2189
		2190	void
		2191	ev_stat_start (EV_P_ ev_stat *w)
		2192	{
		2193	if (expect_false (ev_is_active (w)))
		2194	return;
		2195
		2196	/* since we use memcmp, we need to clear any padding data etc. */
		2197	memset (&w->prev, 0, sizeof (ev_statdata));
		2198	memset (&w->attr, 0, sizeof (ev_statdata));
		2199
		2200	ev_stat_stat (EV_A_ w);
		2201
		2202	if (w->interval < MIN_STAT_INTERVAL)
		2203	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2204
		2205	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2206	ev_set_priority (&w->timer, ev_priority (w));
		2207
		2208	#if EV_USE_INOTIFY
		2209	infy_init (EV_A);
		2210
		2211	if (fs_fd >= 0)
		2212	infy_add (EV_A_ w);
		2213	else
		2214	#endif
		2215	ev_timer_start (EV_A_ &w->timer);
		2216
		2217	ev_start (EV_A_ (W)w, 1);
		2218	}
		2219
		2220	void
		2221	ev_stat_stop (EV_P_ ev_stat *w)
		2222	{
		2223	clear_pending (EV_A_ (W)w);
		2224	if (expect_false (!ev_is_active (w)))
		2225	return;
		2226
		2227	#if EV_USE_INOTIFY
		2228	infy_del (EV_A_ w);
		2229	#endif
		2230	ev_timer_stop (EV_A_ &w->timer);
		2231
		2232	ev_stop (EV_A_ (W)w);
		2233	}
		2234	#endif
		2235
		2236	#if EV_IDLE_ENABLE
		2237	void
		2238	ev_idle_start (EV_P_ ev_idle *w)
		2239	{
		2240	if (expect_false (ev_is_active (w)))
		2241	return;
		2242
		2243	pri_adjust (EV_A_ (W)w);
		2244
		2245	{
		2246	int active = ++idlecnt [ABSPRI (w)];
		2247
		2248	++idleall;
		2249	ev_start (EV_A_ (W)w, active);
		2250
		2251	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2252	idles [ABSPRI (w)][active - 1] = w;
		2253	}
		2254	}
		2255
		2256	void
		2257	ev_idle_stop (EV_P_ ev_idle *w)
		2258	{
		2259	clear_pending (EV_A_ (W)w);
		2260	if (expect_false (!ev_is_active (w)))
		2261	return;
		2262
		2263	{
		2264	int active = ((W)w)->active;
		2265
		2266	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2267	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2268
		2269	ev_stop (EV_A_ (W)w);
		2270	--idleall;
		2271	}
		2272	}
		2273	#endif
		2274
		2275	void
		2276	ev_prepare_start (EV_P_ ev_prepare *w)
		2277	{
		2278	if (expect_false (ev_is_active (w)))
		2279	return;
		2280
		2281	ev_start (EV_A_ (W)w, ++preparecnt);
		2282	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2283	prepares [preparecnt - 1] = w;
		2284	}
		2285
		2286	void
		2287	ev_prepare_stop (EV_P_ ev_prepare *w)
		2288	{
		2289	clear_pending (EV_A_ (W)w);
		2290	if (expect_false (!ev_is_active (w)))
		2291	return;
		2292
		2293	{
		2294	int active = ((W)w)->active;
		2295	prepares [active - 1] = prepares [--preparecnt];
		2296	((W)prepares [active - 1])->active = active;
		2297	}
		2298
		2299	ev_stop (EV_A_ (W)w);
		2300	}
		2301
		2302	void
		2303	ev_check_start (EV_P_ ev_check *w)
		2304	{
		2305	if (expect_false (ev_is_active (w)))
		2306	return;
		2307
		2308	ev_start (EV_A_ (W)w, ++checkcnt);
		2309	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2310	checks [checkcnt - 1] = w;
		2311	}
		2312
		2313	void
		2314	ev_check_stop (EV_P_ ev_check *w)
		2315	{
		2316	clear_pending (EV_A_ (W)w);
		2317	if (expect_false (!ev_is_active (w)))
		2318	return;
		2319
		2320	{
		2321	int active = ((W)w)->active;
		2322	checks [active - 1] = checks [--checkcnt];
		2323	((W)checks [active - 1])->active = active;
		2324	}
		2325
		2326	ev_stop (EV_A_ (W)w);
		2327	}
		2328
		2329	#if EV_EMBED_ENABLE
		2330	void noinline
		2331	ev_embed_sweep (EV_P_ ev_embed *w)
		2332	{
		2333	ev_loop (w->other, EVLOOP_NONBLOCK);
		2334	}
		2335
		2336	static void
		2337	embed_io_cb (EV_P_ ev_io *io, int revents)
		2338	{
		2339	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2340
		2341	if (ev_cb (w))
		2342	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2343	else
		2344	ev_loop (w->other, EVLOOP_NONBLOCK);
		2345	}
		2346
		2347	static void
		2348	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2349	{
		2350	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2351
		2352	{
		2353	struct ev_loop *loop = w->other;
		2354
		2355	while (fdchangecnt)
		2356	{
		2357	fd_reify (EV_A);
		2358	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2359	}
		2360	}
		2361	}
		2362
		2363	#if 0
		2364	static void
		2365	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2366	{
		2367	ev_idle_stop (EV_A_ idle);
		2368	}
		2369	#endif
		2370
		2371	void
		2372	ev_embed_start (EV_P_ ev_embed *w)
		2373	{
		2374	if (expect_false (ev_is_active (w)))
		2375	return;
		2376
		2377	{
		2378	struct ev_loop *loop = w->other;
		2379	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2380	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2381	}
		2382
		2383	ev_set_priority (&w->io, ev_priority (w));
		2384	ev_io_start (EV_A_ &w->io);
		2385
		2386	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2387	ev_set_priority (&w->prepare, EV_MINPRI);
		2388	ev_prepare_start (EV_A_ &w->prepare);
		2389
		2390	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2391
		2392	ev_start (EV_A_ (W)w, 1);
		2393	}
		2394
		2395	void
		2396	ev_embed_stop (EV_P_ ev_embed *w)
		2397	{
		2398	clear_pending (EV_A_ (W)w);
		2399	if (expect_false (!ev_is_active (w)))
		2400	return;
		2401
		2402	ev_io_stop (EV_A_ &w->io);
		2403	ev_prepare_stop (EV_A_ &w->prepare);
		2404
		2405	ev_stop (EV_A_ (W)w);
		2406	}
		2407	#endif
		2408
		2409	#if EV_FORK_ENABLE
		2410	void
		2411	ev_fork_start (EV_P_ ev_fork *w)
		2412	{
		2413	if (expect_false (ev_is_active (w)))
		2414	return;
		2415
		2416	ev_start (EV_A_ (W)w, ++forkcnt);
		2417	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2418	forks [forkcnt - 1] = w;
		2419	}
		2420
		2421	void
		2422	ev_fork_stop (EV_P_ ev_fork *w)
		2423	{
		2424	clear_pending (EV_A_ (W)w);
		2425	if (expect_false (!ev_is_active (w)))
		2426	return;
		2427
		2428	{
		2429	int active = ((W)w)->active;
		2430	forks [active - 1] = forks [--forkcnt];
		2431	((W)forks [active - 1])->active = active;
		2432	}
		2433
		2434	ev_stop (EV_A_ (W)w);
		2435	}
		2436	#endif
		2437
		2438	#if EV_ASYNC_ENABLE
		2439	void
		2440	ev_async_start (EV_P_ ev_async *w)
		2441	{
		2442	if (expect_false (ev_is_active (w)))
		2443	return;
		2444
		2445	evpipe_init (EV_A);
		2446
		2447	ev_start (EV_A_ (W)w, ++asynccnt);
		2448	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2449	asyncs [asynccnt - 1] = w;
		2450	}
		2451
		2452	void
		2453	ev_async_stop (EV_P_ ev_async *w)
		2454	{
		2455	clear_pending (EV_A_ (W)w);
		2456	if (expect_false (!ev_is_active (w)))
		2457	return;
		2458
		2459	{
		2460	int active = ((W)w)->active;
		2461	asyncs [active - 1] = asyncs [--asynccnt];
		2462	((W)asyncs [active - 1])->active = active;
		2463	}
		2464
		2465	ev_stop (EV_A_ (W)w);
		2466	}
		2467
		2468	void
		2469	ev_async_send (EV_P_ ev_async *w)
		2470	{
		2471	w->sent = 1;
		2472	evpipe_write (EV_A_ &gotasync);
		2473	}
		2474	#endif
		2475
684	/*****************************************************************************/	2476	/*****************************************************************************/
685	#if 1	2477
		2478	struct ev_once
		2479	{
		2480	ev_io io;
		2481	ev_timer to;
		2482	void (*cb)(int revents, void *arg);
		2483	void *arg;
		2484	};
686		2485
687	static void	2486	static void
688	sin_cb (struct ev_io *w, int revents)	2487	once_cb (EV_P_ struct ev_once *once, int revents)
689	{	2488	{
690	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2489	void (*cb)(int revents, void *arg) = once->cb;
		2490	void *arg = once->arg;
		2491
		2492	ev_io_stop (EV_A_ &once->io);
		2493	ev_timer_stop (EV_A_ &once->to);
		2494	ev_free (once);
		2495
		2496	cb (revents, arg);
691	}	2497	}
692		2498
693	static void	2499	static void
694	ocb (struct ev_timer *w, int revents)	2500	once_cb_io (EV_P_ ev_io *w, int revents)
695	{	2501	{
696	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2502	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
697	evtimer_stop (w);
698	evtimer_start (w);
699	}	2503	}
700		2504
701	static void	2505	static void
702	scb (struct ev_signal *w, int revents)	2506	once_cb_to (EV_P_ ev_timer *w, int revents)
703	{	2507	{
704	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2508	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
705	}	2509	}
706		2510
707	int main (void)	2511	void
		2512	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
708	{	2513	{
709	struct ev_io sin;	2514	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
710		2515
711	ev_init (0);	2516	if (expect_false (!once))
712
713	evw_init (&sin, sin_cb, 55);
714	evio_set (&sin, 0, EV_READ);
715	evio_start (&sin);
716
717	struct ev_timer t[10000];
718
719	#if 1
720	int i;
721	for (i = 0; i < 10000; ++i)
722	{
723	struct ev_timer *w = t + i;
724	evw_init (w, ocb, i);
725	evtimer_set_abs (w, drand48 (), 0.99775533);
726	evtimer_start (w);
727	if (drand48 () < 0.5)
728	evtimer_stop (w);
729	}	2517	{
730	#endif	2518	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
731
732	struct ev_timer t1;
733	evw_init (&t1, ocb, 0);
734	evtimer_set_abs (&t1, 5, 10);
735	evtimer_start (&t1);
736
737	struct ev_signal sig;
738	evw_init (&sig, scb, 65535);
739	evsignal_set (&sig, SIGQUIT);
740	evsignal_start (&sig);
741
742	ev_loop (0);
743
744	return 0;	2519	return;
745	}	2520	}
746		2521
747	#endif	2522	once->cb = cb;
		2523	once->arg = arg;
748		2524
		2525	ev_init (&once->io, once_cb_io);
		2526	if (fd >= 0)
		2527	{
		2528	ev_io_set (&once->io, fd, events);
		2529	ev_io_start (EV_A_ &once->io);
		2530	}
749		2531
		2532	ev_init (&once->to, once_cb_to);
		2533	if (timeout >= 0.)
		2534	{
		2535	ev_timer_set (&once->to, timeout, 0.);
		2536	ev_timer_start (EV_A_ &once->to);
		2537	}
		2538	}
750		2539
		2540	#if EV_MULTIPLICITY
		2541	#include "ev_wrap.h"
		2542	#endif
751		2543
		2544	#ifdef __cplusplus
		2545	}
		2546	#endif
		2547

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