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Comparing libev/ev.c (file contents):
Revision 1.21 by root, Wed Oct 31 18:37:38 2007 UTC vs.
Revision 1.205 by root, Sun Jan 20 15:37:03 2008 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
6	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
7	* 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.
8	*	27	*
9	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
10	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
11	*	30	* in which case the provisions of the GPL are applicable instead of
12	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
13	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
14	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
15	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
16	*	35	* and other provisions required by the GPL. If you do not delete the
17	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
18	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
19	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	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
29		124
30	#include <math.h>	125	#include <math.h>
31	#include <stdlib.h>	126	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	127	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	128	#include <stddef.h>
36		129
37	#include <stdio.h>	130	#include <stdio.h>
38		131
39	#include <assert.h>	132	#include <assert.h>
40	#include <errno.h>	133	#include <errno.h>
41	#include <sys/time.h>	134	#include <sys/types.h>
42	#include <time.h>	135	#include <time.h>
43		136
44	#ifndef HAVE_MONOTONIC	137	#include <signal.h>
45	# ifdef CLOCK_MONOTONIC	138
46	# define HAVE_MONOTONIC 1	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
47	# endif	154	# endif
48	#endif	155	#endif
49		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
50	#ifndef HAVE_SELECT	171	#ifndef EV_USE_SELECT
51	# define HAVE_SELECT 1	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
52	#endif	180	# endif
		181	#endif
53		182
54	#ifndef HAVE_EPOLL	183	#ifndef EV_USE_EPOLL
55	# define HAVE_EPOLL 0	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
56	#endif	204	# endif
		205	#endif
57		206
58	#ifndef HAVE_REALTIME	207	#ifndef EV_INOTIFY_HASHSIZE
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	208	# if EV_MINIMAL
		209	# define EV_INOTIFY_HASHSIZE 1
		210	# else
		211	# define EV_INOTIFY_HASHSIZE 16
60	#endif	212	# endif
		213	#endif
		214
		215	/**/
		216
		217	#ifndef CLOCK_MONOTONIC
		218	# undef EV_USE_MONOTONIC
		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>
		235	# endif
		236	#endif
		237
		238	#if EV_USE_INOTIFY
		239	# include <sys/inotify.h>
		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 */
61		257
62	#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) */
63	#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 */
64		261
65	#include "ev.h"	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
66		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
67	typedef struct ev_watcher *W;	289	typedef ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	290	typedef ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	291	typedef ev_watcher_time *WT;
70		292
71	static ev_tstamp now, diff; /* monotonic clock */	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 sig_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	};
		388	#include "ev_wrap.h"
		389
		390	static struct ev_loop default_loop_struct;
		391	struct ev_loop *ev_default_loop_ptr;
		392
		393	#else
		394
72	ev_tstamp ev_now;	395	ev_tstamp ev_rt_now;
73	int ev_method;	396	#define VAR(name,decl) static decl;
		397	#include "ev_vars.h"
		398	#undef VAR
74		399
75	static int have_monotonic; /* runtime */	400	static int ev_default_loop_ptr;
76		401
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	402	#endif
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		403
81	/*****************************************************************************/	404	/*****************************************************************************/
82		405
83	ev_tstamp	406	ev_tstamp
84	ev_time (void)	407	ev_time (void)
85	{	408	{
86	#if HAVE_REALTIME	409	#if EV_USE_REALTIME
87	struct timespec ts;	410	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	411	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	412	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	413	#else
91	struct timeval tv;	414	struct timeval tv;
92	gettimeofday (&tv, 0);	415	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	416	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	417	#endif
95	}	418	}
96		419
97	static ev_tstamp	420	ev_tstamp inline_size
98	get_clock (void)	421	get_clock (void)
99	{	422	{
100	#if HAVE_MONOTONIC	423	#if EV_USE_MONOTONIC
101	if (have_monotonic)	424	if (expect_true (have_monotonic))
102	{	425	{
103	struct timespec ts;	426	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	427	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	428	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	429	}
107	#endif	430	#endif
108		431
109	return ev_time ();	432	return ev_time ();
110	}	433	}
111		434
112	#define array_needsize(base,cur,cnt,init) \	435	#if EV_MULTIPLICITY
113	if ((cnt) > cur) \	436	ev_tstamp
114	{ \	437	ev_now (EV_P)
115	int newcnt = cur ? cur << 1 : 16; \	438	{
116	base = realloc (base, sizeof (*base) * (newcnt)); \	439	return ev_rt_now;
117	init (base + cur, newcnt - cur); \	440	}
118	cur = newcnt; \	441	#endif
		442
		443	void
		444	ev_sleep (ev_tstamp delay)
		445	{
		446	if (delay > 0.)
119	}	447	{
		448	#if EV_USE_NANOSLEEP
		449	struct timespec ts;
		450
		451	ts.tv_sec = (time_t)delay;
		452	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		453
		454	nanosleep (&ts, 0);
		455	#elif defined(_WIN32)
		456	Sleep (delay * 1e3);
		457	#else
		458	struct timeval tv;
		459
		460	tv.tv_sec = (time_t)delay;
		461	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		462
		463	select (0, 0, 0, 0, &tv);
		464	#endif
		465	}
		466	}
120		467
121	/*****************************************************************************/	468	/*****************************************************************************/
122		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
123	typedef struct	765	typedef struct
124	{	766	{
125	struct ev_io *head;	767	WL head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void
136	anfds_init (ANFD *base, int count)
137	{
138	while (count--)
139	{
140	base->head = 0;
141	base->wev = base->rev = EV_NONE;
142	++base;
143	}
144	}
145
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;
164	}
165	}
166
167	static void
168	fd_event (int fd, int events)
169	{
170	ANFD *anfd = anfds + fd;
171	struct ev_io *w;
172
173	for (w = anfd->head; w; w = w->next)
174	{
175	int ev = w->events & events;
176
177	if (ev)
178	event ((W)w, ev);
179	}
180	}
181
182	static void
183	queue_events (W *events, int eventcnt, int type)
184	{
185	int i;
186
187	for (i = 0; i < eventcnt; ++i)
188	event (events [i], type);
189	}
190
191	/* called on EBADF to verify fds */
192	static void
193	fd_recheck ()
194	{
195	int fd;
196
197	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)
201	evio_stop (anfds [fd].head);
202	}
203
204	/*****************************************************************************/
205
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void
213	upheap (WT *timers, int k)
214	{
215	WT w = timers [k];
216
217	while (k && timers [k >> 1]->at > w->at)
218	{
219	timers [k] = timers [k >> 1];
220	timers [k]->active = k + 1;
221	k >>= 1;
222	}
223
224	timers [k] = w;
225	timers [k]->active = k + 1;
226
227	}
228
229	static void
230	downheap (WT *timers, int N, int k)
231	{
232	WT w = timers [k];
233
234	while (k < (N >> 1))
235	{
236	int j = k << 1;
237
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239	++j;
240
241	if (w->at <= timers [j]->at)
242	break;
243
244	timers [k] = timers [j];
245	timers [k]->active = k + 1;
246	k = j;
247	}
248
249	timers [k] = w;
250	timers [k]->active = k + 1;
251	}
252
253	/*****************************************************************************/
254
255	typedef struct
256	{
257	struct ev_signal *head;
258	sig_atomic_t gotsig;	768	sig_atomic_t volatile gotsig;
259	} ANSIG;	769	} ANSIG;
260		770
261	static ANSIG *signals;	771	static ANSIG *signals;
262	static int signalmax;	772	static int signalmax;
263		773
264	static int sigpipe [2];	774	static int sigpipe [2];
265	static sig_atomic_t gotsig;	775	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	776	static ev_io sigev;
267		777
268	static void	778	void inline_size
269	signals_init (ANSIG *base, int count)	779	signals_init (ANSIG *base, int count)
270	{	780	{
271	while (count--)	781	while (count--)
272	{	782	{
273	base->head = 0;	783	base->head = 0;
274	base->gotsig = 0;	784	base->gotsig = 0;
		785
275	++base;	786	++base;
276	}	787	}
277	}	788	}
278		789
279	static void	790	static void
280	sighandler (int signum)	791	sighandler (int signum)
281	{	792	{
		793	#if _WIN32
		794	signal (signum, sighandler);
		795	#endif
		796
282	signals [signum - 1].gotsig = 1;	797	signals [signum - 1].gotsig = 1;
283		798
284	if (!gotsig)	799	if (!gotsig)
285	{	800	{
		801	int old_errno = errno;
286	gotsig = 1;	802	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	803	write (sigpipe [1], &signum, 1);
		804	errno = old_errno;
288	}	805	}
		806	}
		807
		808	void noinline
		809	ev_feed_signal_event (EV_P_ int signum)
		810	{
		811	WL w;
		812
		813	#if EV_MULTIPLICITY
		814	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		815	#endif
		816
		817	--signum;
		818
		819	if (signum < 0 || signum >= signalmax)
		820	return;
		821
		822	signals [signum].gotsig = 0;
		823
		824	for (w = signals [signum].head; w; w = w->next)
		825	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
289	}	826	}
290		827
291	static void	828	static void
292	sigcb (struct ev_io *iow, int revents)	829	sigcb (EV_P_ ev_io *iow, int revents)
293	{	830	{
294	struct ev_signal *w;
295	int sig;	831	int signum;
296		832
		833	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	834	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		835
300	for (sig = signalmax; sig--; )	836	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	837	if (signals [signum].gotsig)
		838	ev_feed_signal_event (EV_A_ signum + 1);
		839	}
		840
		841	void inline_speed
		842	fd_intern (int fd)
		843	{
		844	#ifdef _WIN32
		845	int arg = 1;
		846	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		847	#else
		848	fcntl (fd, F_SETFD, FD_CLOEXEC);
		849	fcntl (fd, F_SETFL, O_NONBLOCK);
		850	#endif
		851	}
		852
		853	static void noinline
		854	siginit (EV_P)
		855	{
		856	fd_intern (sigpipe [0]);
		857	fd_intern (sigpipe [1]);
		858
		859	ev_io_set (&sigev, sigpipe [0], EV_READ);
		860	ev_io_start (EV_A_ &sigev);
		861	ev_unref (EV_A); /* child watcher should not keep loop alive */
		862	}
		863
		864	/*****************************************************************************/
		865
		866	static WL childs [EV_PID_HASHSIZE];
		867
		868	#ifndef _WIN32
		869
		870	static ev_signal childev;
		871
		872	void inline_speed
		873	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		874	{
		875	ev_child *w;
		876
		877	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		878	if (w->pid == pid || !w->pid)
302	{	879	{
303	signals [sig].gotsig = 0;	880	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
304		881	w->rpid = pid;
305	for (w = signals [sig].head; w; w = w->next)	882	w->rstatus = status;
306	event ((W)w, EV_SIGNAL);	883	ev_feed_event (EV_A_ (W)w, EV_CHILD);
307	}	884	}
308	}	885	}
309		886
		887	#ifndef WCONTINUED
		888	# define WCONTINUED 0
		889	#endif
		890
310	static void	891	static void
311	siginit (void)	892	childcb (EV_P_ ev_signal *sw, int revents)
312	{	893	{
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	894	int pid, status;
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		895
316	/* rather than sort out wether we really need nb, set it */	896	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	897	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	898	if (!WCONTINUED
		899	|| errno != EINVAL
		900	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		901	return;
319		902
320	evio_set (&sigev, sigpipe [0], EV_READ);	903	/* make sure we are called again until all childs have been reaped */
321	evio_start (&sigev);	904	/* we need to do it this way so that the callback gets called before we continue */
		905	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		906
		907	child_reap (EV_A_ sw, pid, pid, status);
		908	if (EV_PID_HASHSIZE > 1)
		909	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
322	}	910	}
		911
		912	#endif
323		913
324	/*****************************************************************************/	914	/*****************************************************************************/
325		915
326	static struct ev_idle **idles;	916	#if EV_USE_PORT
327	static int idlemax, idlecnt;	917	# include "ev_port.c"
		918	#endif
		919	#if EV_USE_KQUEUE
		920	# include "ev_kqueue.c"
		921	#endif
		922	#if EV_USE_EPOLL
		923	# include "ev_epoll.c"
		924	#endif
		925	#if EV_USE_POLL
		926	# include "ev_poll.c"
		927	#endif
		928	#if EV_USE_SELECT
		929	# include "ev_select.c"
		930	#endif
328		931
329	static struct ev_prepare **prepares;	932	int
330	static int preparemax, preparecnt;	933	ev_version_major (void)
		934	{
		935	return EV_VERSION_MAJOR;
		936	}
331		937
332	static struct ev_check **checks;	938	int
333	static int checkmax, checkcnt;	939	ev_version_minor (void)
		940	{
		941	return EV_VERSION_MINOR;
		942	}
		943
		944	/* return true if we are running with elevated privileges and should ignore env variables */
		945	int inline_size
		946	enable_secure (void)
		947	{
		948	#ifdef _WIN32
		949	return 0;
		950	#else
		951	return getuid () != geteuid ()
		952	|| getgid () != getegid ();
		953	#endif
		954	}
		955
		956	unsigned int
		957	ev_supported_backends (void)
		958	{
		959	unsigned int flags = 0;
		960
		961	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		962	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		963	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		964	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		965	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		966
		967	return flags;
		968	}
		969
		970	unsigned int
		971	ev_recommended_backends (void)
		972	{
		973	unsigned int flags = ev_supported_backends ();
		974
		975	#ifndef __NetBSD__
		976	/* kqueue is borked on everything but netbsd apparently */
		977	/* it usually doesn't work correctly on anything but sockets and pipes */
		978	flags &= ~EVBACKEND_KQUEUE;
		979	#endif
		980	#ifdef __APPLE__
		981	// flags &= ~EVBACKEND_KQUEUE; for documentation
		982	flags &= ~EVBACKEND_POLL;
		983	#endif
		984
		985	return flags;
		986	}
		987
		988	unsigned int
		989	ev_embeddable_backends (void)
		990	{
		991	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		992
		993	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		994	/* please fix it and tell me how to detect the fix */
		995	flags &= ~EVBACKEND_EPOLL;
		996
		997	return flags;
		998	}
		999
		1000	unsigned int
		1001	ev_backend (EV_P)
		1002	{
		1003	return backend;
		1004	}
		1005
		1006	unsigned int
		1007	ev_loop_count (EV_P)
		1008	{
		1009	return loop_count;
		1010	}
		1011
		1012	void
		1013	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1014	{
		1015	io_blocktime = interval;
		1016	}
		1017
		1018	void
		1019	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1020	{
		1021	timeout_blocktime = interval;
		1022	}
		1023
		1024	static void noinline
		1025	loop_init (EV_P_ unsigned int flags)
		1026	{
		1027	if (!backend)
		1028	{
		1029	#if EV_USE_MONOTONIC
		1030	{
		1031	struct timespec ts;
		1032	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1033	have_monotonic = 1;
		1034	}
		1035	#endif
		1036
		1037	ev_rt_now = ev_time ();
		1038	mn_now = get_clock ();
		1039	now_floor = mn_now;
		1040	rtmn_diff = ev_rt_now - mn_now;
		1041
		1042	io_blocktime = 0.;
		1043	timeout_blocktime = 0.;
		1044
		1045	/* pid check not overridable via env */
		1046	#ifndef _WIN32
		1047	if (flags & EVFLAG_FORKCHECK)
		1048	curpid = getpid ();
		1049	#endif
		1050
		1051	if (!(flags & EVFLAG_NOENV)
		1052	&& !enable_secure ()
		1053	&& getenv ("LIBEV_FLAGS"))
		1054	flags = atoi (getenv ("LIBEV_FLAGS"));
		1055
		1056	if (!(flags & 0x0000ffffUL))
		1057	flags |= ev_recommended_backends ();
		1058
		1059	backend = 0;
		1060	backend_fd = -1;
		1061	#if EV_USE_INOTIFY
		1062	fs_fd = -2;
		1063	#endif
		1064
		1065	#if EV_USE_PORT
		1066	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1067	#endif
		1068	#if EV_USE_KQUEUE
		1069	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1070	#endif
		1071	#if EV_USE_EPOLL
		1072	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1073	#endif
		1074	#if EV_USE_POLL
		1075	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1076	#endif
		1077	#if EV_USE_SELECT
		1078	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1079	#endif
		1080
		1081	ev_init (&sigev, sigcb);
		1082	ev_set_priority (&sigev, EV_MAXPRI);
		1083	}
		1084	}
		1085
		1086	static void noinline
		1087	loop_destroy (EV_P)
		1088	{
		1089	int i;
		1090
		1091	#if EV_USE_INOTIFY
		1092	if (fs_fd >= 0)
		1093	close (fs_fd);
		1094	#endif
		1095
		1096	if (backend_fd >= 0)
		1097	close (backend_fd);
		1098
		1099	#if EV_USE_PORT
		1100	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1101	#endif
		1102	#if EV_USE_KQUEUE
		1103	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1104	#endif
		1105	#if EV_USE_EPOLL
		1106	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1107	#endif
		1108	#if EV_USE_POLL
		1109	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1110	#endif
		1111	#if EV_USE_SELECT
		1112	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1113	#endif
		1114
		1115	for (i = NUMPRI; i--; )
		1116	{
		1117	array_free (pending, [i]);
		1118	#if EV_IDLE_ENABLE
		1119	array_free (idle, [i]);
		1120	#endif
		1121	}
		1122
		1123	ev_free (anfds); anfdmax = 0;
		1124
		1125	/* have to use the microsoft-never-gets-it-right macro */
		1126	array_free (fdchange, EMPTY);
		1127	array_free (timer, EMPTY);
		1128	#if EV_PERIODIC_ENABLE
		1129	array_free (periodic, EMPTY);
		1130	#endif
		1131	#if EV_FORK_ENABLE
		1132	array_free (fork, EMPTY);
		1133	#endif
		1134	array_free (prepare, EMPTY);
		1135	array_free (check, EMPTY);
		1136
		1137	backend = 0;
		1138	}
		1139
		1140	void inline_size infy_fork (EV_P);
		1141
		1142	void inline_size
		1143	loop_fork (EV_P)
		1144	{
		1145	#if EV_USE_PORT
		1146	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1147	#endif
		1148	#if EV_USE_KQUEUE
		1149	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1150	#endif
		1151	#if EV_USE_EPOLL
		1152	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1153	#endif
		1154	#if EV_USE_INOTIFY
		1155	infy_fork (EV_A);
		1156	#endif
		1157
		1158	if (ev_is_active (&sigev))
		1159	{
		1160	/* default loop */
		1161
		1162	ev_ref (EV_A);
		1163	ev_io_stop (EV_A_ &sigev);
		1164	close (sigpipe [0]);
		1165	close (sigpipe [1]);
		1166
		1167	while (pipe (sigpipe))
		1168	syserr ("(libev) error creating pipe");
		1169
		1170	siginit (EV_A);
		1171	sigcb (EV_A_ &sigev, EV_READ);
		1172	}
		1173
		1174	postfork = 0;
		1175	}
		1176
		1177	#if EV_MULTIPLICITY
		1178	struct ev_loop *
		1179	ev_loop_new (unsigned int flags)
		1180	{
		1181	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1182
		1183	memset (loop, 0, sizeof (struct ev_loop));
		1184
		1185	loop_init (EV_A_ flags);
		1186
		1187	if (ev_backend (EV_A))
		1188	return loop;
		1189
		1190	return 0;
		1191	}
		1192
		1193	void
		1194	ev_loop_destroy (EV_P)
		1195	{
		1196	loop_destroy (EV_A);
		1197	ev_free (loop);
		1198	}
		1199
		1200	void
		1201	ev_loop_fork (EV_P)
		1202	{
		1203	postfork = 1; /* must be in line with ev_default_fork */
		1204	}
		1205
		1206	#endif
		1207
		1208	#if EV_MULTIPLICITY
		1209	struct ev_loop *
		1210	ev_default_loop_init (unsigned int flags)
		1211	#else
		1212	int
		1213	ev_default_loop (unsigned int flags)
		1214	#endif
		1215	{
		1216	if (sigpipe [0] == sigpipe [1])
		1217	if (pipe (sigpipe))
		1218	return 0;
		1219
		1220	if (!ev_default_loop_ptr)
		1221	{
		1222	#if EV_MULTIPLICITY
		1223	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1224	#else
		1225	ev_default_loop_ptr = 1;
		1226	#endif
		1227
		1228	loop_init (EV_A_ flags);
		1229
		1230	if (ev_backend (EV_A))
		1231	{
		1232	siginit (EV_A);
		1233
		1234	#ifndef _WIN32
		1235	ev_signal_init (&childev, childcb, SIGCHLD);
		1236	ev_set_priority (&childev, EV_MAXPRI);
		1237	ev_signal_start (EV_A_ &childev);
		1238	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1239	#endif
		1240	}
		1241	else
		1242	ev_default_loop_ptr = 0;
		1243	}
		1244
		1245	return ev_default_loop_ptr;
		1246	}
		1247
		1248	void
		1249	ev_default_destroy (void)
		1250	{
		1251	#if EV_MULTIPLICITY
		1252	struct ev_loop *loop = ev_default_loop_ptr;
		1253	#endif
		1254
		1255	#ifndef _WIN32
		1256	ev_ref (EV_A); /* child watcher */
		1257	ev_signal_stop (EV_A_ &childev);
		1258	#endif
		1259
		1260	ev_ref (EV_A); /* signal watcher */
		1261	ev_io_stop (EV_A_ &sigev);
		1262
		1263	close (sigpipe [0]); sigpipe [0] = 0;
		1264	close (sigpipe [1]); sigpipe [1] = 0;
		1265
		1266	loop_destroy (EV_A);
		1267	}
		1268
		1269	void
		1270	ev_default_fork (void)
		1271	{
		1272	#if EV_MULTIPLICITY
		1273	struct ev_loop *loop = ev_default_loop_ptr;
		1274	#endif
		1275
		1276	if (backend)
		1277	postfork = 1; /* must be in line with ev_loop_fork */
		1278	}
334		1279
335	/*****************************************************************************/	1280	/*****************************************************************************/
336		1281
337	#if HAVE_EPOLL	1282	void
338	# include "ev_epoll.c"	1283	ev_invoke (EV_P_ void *w, int revents)
339	#endif
340	#if HAVE_SELECT
341	# include "ev_select.c"
342	#endif
343
344	int ev_init (int flags)
345	{	1284	{
346	#if HAVE_MONOTONIC	1285	EV_CB_INVOKE ((W)w, revents);
347	{
348	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;
351	}
352	#endif
353
354	ev_now = ev_time ();
355	now = get_clock ();
356	diff = ev_now - now;
357
358	if (pipe (sigpipe))
359	return 0;
360
361	ev_method = EVMETHOD_NONE;
362	#if HAVE_EPOLL
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364	#endif
365	#if HAVE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);
367	#endif
368
369	if (ev_method)
370	{
371	evw_init (&sigev, sigcb);
372	siginit ();
373	}
374
375	return ev_method;
376	}	1286	}
377		1287
378	/*****************************************************************************/	1288	void inline_speed
379		1289	call_pending (EV_P)
380	void ev_prefork (void)
381	{	1290	{
382	/* nop */
383	}
384
385	void ev_postfork_parent (void)
386	{
387	/* nop */
388	}
389
390	void ev_postfork_child (void)
391	{
392	#if HAVE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();
395	#endif
396
397	evio_stop (&sigev);
398	close (sigpipe [0]);
399	close (sigpipe [1]);
400	pipe (sigpipe);
401	siginit ();
402	}
403
404	/*****************************************************************************/
405
406	static void
407	fd_reify (void)
408	{
409	int i;	1291	int pri;
410		1292
411	for (i = 0; i < fdchangecnt; ++i)	1293	for (pri = NUMPRI; pri--; )
		1294	while (pendingcnt [pri])
412	{	1295	{
413	int fd = fdchanges [i];	1296	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
414	ANFD *anfd = anfds + fd;
415	struct ev_io *w;
416		1297
417	int wev = 0;	1298	if (expect_true (p->w))
418
419	for (w = anfd->head; w; w = w->next)
420	wev |= w->events;
421
422	if (anfd->wev != wev)
423	{	1299	{
424	method_modify (fd, anfd->wev, wev);	1300	/*assert (("non-pending watcher on pending list", p->w->pending));*/
425	anfd->wev = wev;
426	}
427	}
428		1301
429	fdchangecnt = 0;
430	}
431
432	static void
433	call_pending ()
434	{
435	while (pendingcnt)
436	{
437	ANPENDING *p = pendings + --pendingcnt;
438
439	if (p->w)
440	{
441	p->w->pending = 0;	1302	p->w->pending = 0;
442	p->w->cb (p->w, p->events);	1303	EV_CB_INVOKE (p->w, p->events);
443	}	1304	}
444	}	1305	}
445	}	1306	}
446		1307
447	static void	1308	void inline_size
448	timers_reify ()	1309	timers_reify (EV_P)
449	{	1310	{
450	while (timercnt && timers [0]->at <= now)	1311	while (timercnt && ((WT)timers [0])->at <= mn_now)
451	{	1312	{
452	struct ev_timer *w = timers [0];	1313	ev_timer *w = (ev_timer *)timers [0];
453		1314
454	event ((W)w, EV_TIMEOUT);	1315	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
455		1316
456	/* first reschedule or stop timer */	1317	/* first reschedule or stop timer */
457	if (w->repeat)	1318	if (w->repeat)
458	{	1319	{
		1320	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1321
459	w->at = now + w->repeat;	1322	((WT)w)->at += w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));	1323	if (((WT)w)->at < mn_now)
		1324	((WT)w)->at = mn_now;
		1325
461	downheap ((WT *)timers, timercnt, 0);	1326	downheap (timers, timercnt, 0);
462	}	1327	}
463	else	1328	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	1329	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		1330
468	static void	1331	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1332	}
		1333	}
		1334
		1335	#if EV_PERIODIC_ENABLE
		1336	void inline_size
469	periodics_reify ()	1337	periodics_reify (EV_P)
470	{	1338	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	1339	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
472	{	1340	{
473	struct ev_periodic *w = periodics [0];	1341	ev_periodic *w = (ev_periodic *)periodics [0];
		1342
		1343	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
474		1344
475	/* first reschedule or stop timer */	1345	/* first reschedule or stop timer */
476	if (w->interval)	1346	if (w->reschedule_cb)
477	{	1347	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1348	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
479	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1349	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
480	downheap ((WT *)periodics, periodiccnt, 0);	1350	downheap (periodics, periodiccnt, 0);
		1351	}
		1352	else if (w->interval)
		1353	{
		1354	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1355	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1356	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1357	downheap (periodics, periodiccnt, 0);
481	}	1358	}
482	else	1359	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	1360	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		1361
485	event ((W)w, EV_TIMEOUT);	1362	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486	}	1363	}
487	}	1364	}
488		1365
489	static void	1366	static void noinline
490	periodics_reschedule (ev_tstamp diff)	1367	periodics_reschedule (EV_P)
491	{	1368	{
492	int i;	1369	int i;
493		1370
494	/* adjust periodics after time jump */	1371	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	1372	for (i = 0; i < periodiccnt; ++i)
496	{	1373	{
497	struct ev_periodic *w = periodics [i];	1374	ev_periodic *w = (ev_periodic *)periodics [i];
498		1375
		1376	if (w->reschedule_cb)
		1377	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
499	if (w->interval)	1378	else if (w->interval)
		1379	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1380	}
		1381
		1382	/* now rebuild the heap */
		1383	for (i = periodiccnt >> 1; i--; )
		1384	downheap (periodics, periodiccnt, i);
		1385	}
		1386	#endif
		1387
		1388	#if EV_IDLE_ENABLE
		1389	void inline_size
		1390	idle_reify (EV_P)
		1391	{
		1392	if (expect_false (idleall))
		1393	{
		1394	int pri;
		1395
		1396	for (pri = NUMPRI; pri--; )
500	{	1397	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1398	if (pendingcnt [pri])
		1399	break;
502		1400
503	if (fabs (diff) >= 1e-4)	1401	if (idlecnt [pri])
504	{	1402	{
505	evperiodic_stop (w);	1403	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
506	evperiodic_start (w);	1404	break;
507
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */
509	}	1405	}
510	}	1406	}
511	}	1407	}
512	}	1408	}
		1409	#endif
513		1410
514	static void	1411	void inline_speed
515	time_update ()	1412	time_update (EV_P_ ev_tstamp max_block)
516	{	1413	{
517	int i;	1414	int i;
518		1415
519	ev_now = ev_time ();	1416	#if EV_USE_MONOTONIC
520
521	if (have_monotonic)	1417	if (expect_true (have_monotonic))
522	{	1418	{
523	ev_tstamp odiff = diff;	1419	ev_tstamp odiff = rtmn_diff;
524		1420
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1421	mn_now = get_clock ();
		1422
		1423	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1424	/* interpolate in the meantime */
		1425	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
526	{	1426	{
527	now = get_clock ();	1427	ev_rt_now = rtmn_diff + mn_now;
		1428	return;
		1429	}
		1430
		1431	now_floor = mn_now;
		1432	ev_rt_now = ev_time ();
		1433
		1434	/* loop a few times, before making important decisions.
		1435	* on the choice of "4": one iteration isn't enough,
		1436	* in case we get preempted during the calls to
		1437	* ev_time and get_clock. a second call is almost guaranteed
		1438	* to succeed in that case, though. and looping a few more times
		1439	* doesn't hurt either as we only do this on time-jumps or
		1440	* in the unlikely event of having been preempted here.
		1441	*/
		1442	for (i = 4; --i; )
		1443	{
528	diff = ev_now - now;	1444	rtmn_diff = ev_rt_now - mn_now;
529		1445
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1446	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
531	return; /* all is well */	1447	return; /* all is well */
532		1448
533	ev_now = ev_time ();	1449	ev_rt_now = ev_time ();
		1450	mn_now = get_clock ();
		1451	now_floor = mn_now;
534	}	1452	}
535		1453
		1454	# if EV_PERIODIC_ENABLE
536	periodics_reschedule (diff - odiff);	1455	periodics_reschedule (EV_A);
		1456	# endif
537	/* no timer adjustment, as the monotonic clock doesn't jump */	1457	/* no timer adjustment, as the monotonic clock doesn't jump */
		1458	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
538	}	1459	}
539	else	1460	else
		1461	#endif
540	{	1462	{
541	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1463	ev_rt_now = ev_time ();
		1464
		1465	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
542	{	1466	{
		1467	#if EV_PERIODIC_ENABLE
543	periodics_reschedule (ev_now - now);	1468	periodics_reschedule (EV_A);
544		1469	#endif
545	/* adjust timers. this is easy, as the offset is the same for all */	1470	/* adjust timers. this is easy, as the offset is the same for all of them */
546	for (i = 0; i < timercnt; ++i)	1471	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	1472	((WT)timers [i])->at += ev_rt_now - mn_now;
548	}	1473	}
549		1474
550	now = ev_now;	1475	mn_now = ev_rt_now;
551	}	1476	}
552	}	1477	}
553		1478
554	int ev_loop_done;	1479	void
		1480	ev_ref (EV_P)
		1481	{
		1482	++activecnt;
		1483	}
555		1484
		1485	void
		1486	ev_unref (EV_P)
		1487	{
		1488	--activecnt;
		1489	}
		1490
		1491	static int loop_done;
		1492
		1493	void
556	void ev_loop (int flags)	1494	ev_loop (EV_P_ int flags)
557	{	1495	{
558	double block;	1496	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1497	? EVUNLOOP_ONE
		1498	: EVUNLOOP_CANCEL;
		1499
		1500	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
560		1501
561	do	1502	do
562	{	1503	{
		1504	#ifndef _WIN32
		1505	if (expect_false (curpid)) /* penalise the forking check even more */
		1506	if (expect_false (getpid () != curpid))
		1507	{
		1508	curpid = getpid ();
		1509	postfork = 1;
		1510	}
		1511	#endif
		1512
		1513	#if EV_FORK_ENABLE
		1514	/* we might have forked, so queue fork handlers */
		1515	if (expect_false (postfork))
		1516	if (forkcnt)
		1517	{
		1518	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1519	call_pending (EV_A);
		1520	}
		1521	#endif
		1522
563	/* queue check watchers (and execute them) */	1523	/* queue prepare watchers (and execute them) */
564	if (preparecnt)	1524	if (expect_false (preparecnt))
565	{	1525	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1526	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	1527	call_pending (EV_A);
568	}	1528	}
569		1529
		1530	if (expect_false (!activecnt))
		1531	break;
		1532
		1533	/* we might have forked, so reify kernel state if necessary */
		1534	if (expect_false (postfork))
		1535	loop_fork (EV_A);
		1536
570	/* update fd-related kernel structures */	1537	/* update fd-related kernel structures */
571	fd_reify ();	1538	fd_reify (EV_A);
572		1539
573	/* calculate blocking time */	1540	/* calculate blocking time */
		1541	{
		1542	ev_tstamp waittime = 0.;
		1543	ev_tstamp sleeptime = 0.;
574		1544
575	/* we only need this for !monotonic clockor timers, but as we basically	1545	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
576	always have timers, we just calculate it always */
577	ev_now = ev_time ();
578
579	if (flags & EVLOOP_NONBLOCK || idlecnt)
580	block = 0.;
581	else
582	{	1546	{
		1547	/* update time to cancel out callback processing overhead */
		1548	time_update (EV_A_ 1e100);
		1549
583	block = MAX_BLOCKTIME;	1550	waittime = MAX_BLOCKTIME;
584		1551
585	if (timercnt)	1552	if (timercnt)
586	{	1553	{
587	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1554	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
588	if (block > to) block = to;	1555	if (waittime > to) waittime = to;
589	}	1556	}
590		1557
		1558	#if EV_PERIODIC_ENABLE
591	if (periodiccnt)	1559	if (periodiccnt)
592	{	1560	{
593	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1561	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
594	if (block > to) block = to;	1562	if (waittime > to) waittime = to;
595	}	1563	}
		1564	#endif
596		1565
597	if (block < 0.) block = 0.;	1566	if (expect_false (waittime < timeout_blocktime))
		1567	waittime = timeout_blocktime;
		1568
		1569	sleeptime = waittime - backend_fudge;
		1570
		1571	if (expect_true (sleeptime > io_blocktime))
		1572	sleeptime = io_blocktime;
		1573
		1574	if (sleeptime)
		1575	{
		1576	ev_sleep (sleeptime);
		1577	waittime -= sleeptime;
		1578	}
598	}	1579	}
599		1580
600	method_poll (block);	1581	++loop_count;
		1582	backend_poll (EV_A_ waittime);
601		1583
602	/* update ev_now, do magic */	1584	/* update ev_rt_now, do magic */
603	time_update ();	1585	time_update (EV_A_ waittime + sleeptime);
		1586	}
604		1587
605	/* queue pending timers and reschedule them */	1588	/* queue pending timers and reschedule them */
606	timers_reify (); /* relative timers called last */	1589	timers_reify (EV_A); /* relative timers called last */
		1590	#if EV_PERIODIC_ENABLE
607	periodics_reify (); /* absolute timers called first */	1591	periodics_reify (EV_A); /* absolute timers called first */
		1592	#endif
608		1593
		1594	#if EV_IDLE_ENABLE
609	/* queue idle watchers unless io or timers are pending */	1595	/* queue idle watchers unless other events are pending */
610	if (!pendingcnt)	1596	idle_reify (EV_A);
611	queue_events ((W *)idles, idlecnt, EV_IDLE);	1597	#endif
612		1598
613	/* queue check watchers, to be executed first */	1599	/* queue check watchers, to be executed first */
614	if (checkcnt)	1600	if (expect_false (checkcnt))
615	queue_events ((W *)checks, checkcnt, EV_CHECK);	1601	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
616		1602
617	call_pending ();	1603	call_pending (EV_A);
618	}
619	while (!ev_loop_done);
620		1604
621	if (ev_loop_done != 2)	1605	}
		1606	while (expect_true (activecnt && !loop_done));
		1607
		1608	if (loop_done == EVUNLOOP_ONE)
		1609	loop_done = EVUNLOOP_CANCEL;
		1610	}
		1611
		1612	void
		1613	ev_unloop (EV_P_ int how)
		1614	{
622	ev_loop_done = 0;	1615	loop_done = how;
623	}	1616	}
624		1617
625	/*****************************************************************************/	1618	/*****************************************************************************/
626		1619
627	static void	1620	void inline_size
628	wlist_add (WL *head, WL elem)	1621	wlist_add (WL *head, WL elem)
629	{	1622	{
630	elem->next = *head;	1623	elem->next = *head;
631	*head = elem;	1624	*head = elem;
632	}	1625	}
633		1626
634	static void	1627	void inline_size
635	wlist_del (WL *head, WL elem)	1628	wlist_del (WL *head, WL elem)
636	{	1629	{
637	while (*head)	1630	while (*head)
638	{	1631	{
639	if (*head == elem)	1632	if (*head == elem)
…		…
644		1637
645	head = &(*head)->next;	1638	head = &(*head)->next;
646	}	1639	}
647	}	1640	}
648		1641
649	static void	1642	void inline_speed
650	ev_clear (W w)	1643	clear_pending (EV_P_ W w)
651	{	1644	{
652	if (w->pending)	1645	if (w->pending)
653	{	1646	{
654	pendings [w->pending - 1].w = 0;	1647	pendings [ABSPRI (w)][w->pending - 1].w = 0;
655	w->pending = 0;	1648	w->pending = 0;
656	}	1649	}
657	}	1650	}
658		1651
659	static void	1652	int
		1653	ev_clear_pending (EV_P_ void *w)
		1654	{
		1655	W w_ = (W)w;
		1656	int pending = w_->pending;
		1657
		1658	if (expect_true (pending))
		1659	{
		1660	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1661	w_->pending = 0;
		1662	p->w = 0;
		1663	return p->events;
		1664	}
		1665	else
		1666	return 0;
		1667	}
		1668
		1669	void inline_size
		1670	pri_adjust (EV_P_ W w)
		1671	{
		1672	int pri = w->priority;
		1673	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1674	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1675	w->priority = pri;
		1676	}
		1677
		1678	void inline_speed
660	ev_start (W w, int active)	1679	ev_start (EV_P_ W w, int active)
661	{	1680	{
		1681	pri_adjust (EV_A_ w);
662	w->active = active;	1682	w->active = active;
		1683	ev_ref (EV_A);
663	}	1684	}
664		1685
665	static void	1686	void inline_size
666	ev_stop (W w)	1687	ev_stop (EV_P_ W w)
667	{	1688	{
		1689	ev_unref (EV_A);
668	w->active = 0;	1690	w->active = 0;
669	}	1691	}
670		1692
671	/*****************************************************************************/	1693	/*****************************************************************************/
672		1694
673	void	1695	void noinline
674	evio_start (struct ev_io *w)	1696	ev_io_start (EV_P_ ev_io *w)
675	{	1697	{
676	if (ev_is_active (w))
677	return;
678
679	int fd = w->fd;	1698	int fd = w->fd;
680		1699
		1700	if (expect_false (ev_is_active (w)))
		1701	return;
		1702
		1703	assert (("ev_io_start called with negative fd", fd >= 0));
		1704
681	ev_start ((W)w, 1);	1705	ev_start (EV_A_ (W)w, 1);
682	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1706	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
683	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1707	wlist_add (&anfds[fd].head, (WL)w);
684		1708
685	++fdchangecnt;	1709	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
686	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1710	w->events &= ~EV_IOFDSET;
687	fdchanges [fdchangecnt - 1] = fd;
688	}	1711	}
689		1712
690	void	1713	void noinline
691	evio_stop (struct ev_io *w)	1714	ev_io_stop (EV_P_ ev_io *w)
692	{	1715	{
693	ev_clear ((W)w);	1716	clear_pending (EV_A_ (W)w);
694	if (!ev_is_active (w))	1717	if (expect_false (!ev_is_active (w)))
695	return;	1718	return;
696		1719
		1720	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1721
697	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1722	wlist_del (&anfds[w->fd].head, (WL)w);
698	ev_stop ((W)w);	1723	ev_stop (EV_A_ (W)w);
699		1724
700	++fdchangecnt;	1725	fd_change (EV_A_ w->fd, 1);
701	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
702	fdchanges [fdchangecnt - 1] = w->fd;
703	}	1726	}
704		1727
705	void	1728	void noinline
706	evtimer_start (struct ev_timer *w)	1729	ev_timer_start (EV_P_ ev_timer *w)
707	{	1730	{
708	if (ev_is_active (w))	1731	if (expect_false (ev_is_active (w)))
709	return;	1732	return;
710		1733
711	w->at += now;	1734	((WT)w)->at += mn_now;
712		1735
713	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1736	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
714		1737
715	ev_start ((W)w, ++timercnt);	1738	ev_start (EV_A_ (W)w, ++timercnt);
716	array_needsize (timers, timermax, timercnt, );	1739	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
717	timers [timercnt - 1] = w;	1740	timers [timercnt - 1] = (WT)w;
718	upheap ((WT *)timers, timercnt - 1);	1741	upheap (timers, timercnt - 1);
719	}
720		1742
721	void	1743	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1744	}
		1745
		1746	void noinline
722	evtimer_stop (struct ev_timer *w)	1747	ev_timer_stop (EV_P_ ev_timer *w)
723	{	1748	{
724	ev_clear ((W)w);	1749	clear_pending (EV_A_ (W)w);
725	if (!ev_is_active (w))	1750	if (expect_false (!ev_is_active (w)))
726	return;	1751	return;
727		1752
728	if (w->active < timercnt--)	1753	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1754
		1755	{
		1756	int active = ((W)w)->active;
		1757
		1758	if (expect_true (--active < --timercnt))
729	{	1759	{
730	timers [w->active - 1] = timers [timercnt];	1760	timers [active] = timers [timercnt];
731	downheap ((WT *)timers, timercnt, w->active - 1);	1761	adjustheap (timers, timercnt, active);
732	}	1762	}
		1763	}
733		1764
734	w->at = w->repeat;	1765	((WT)w)->at -= mn_now;
735		1766
736	ev_stop ((W)w);	1767	ev_stop (EV_A_ (W)w);
737	}	1768	}
738		1769
739	void	1770	void noinline
740	evtimer_again (struct ev_timer *w)	1771	ev_timer_again (EV_P_ ev_timer *w)
741	{	1772	{
742	if (ev_is_active (w))	1773	if (ev_is_active (w))
743	{	1774	{
744	if (w->repeat)	1775	if (w->repeat)
745	{	1776	{
746	w->at = now + w->repeat;	1777	((WT)w)->at = mn_now + w->repeat;
747	downheap ((WT *)timers, timercnt, w->active - 1);	1778	adjustheap (timers, timercnt, ((W)w)->active - 1);
748	}	1779	}
749	else	1780	else
750	evtimer_stop (w);	1781	ev_timer_stop (EV_A_ w);
751	}	1782	}
752	else if (w->repeat)	1783	else if (w->repeat)
		1784	{
		1785	w->at = w->repeat;
753	evtimer_start (w);	1786	ev_timer_start (EV_A_ w);
		1787	}
754	}	1788	}
755		1789
756	void	1790	#if EV_PERIODIC_ENABLE
		1791	void noinline
757	evperiodic_start (struct ev_periodic *w)	1792	ev_periodic_start (EV_P_ ev_periodic *w)
758	{	1793	{
759	if (ev_is_active (w))	1794	if (expect_false (ev_is_active (w)))
760	return;	1795	return;
761		1796
762	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1797	if (w->reschedule_cb)
763		1798	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1799	else if (w->interval)
		1800	{
		1801	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
764	/* this formula differs from the one in periodic_reify because we do not always round up */	1802	/* this formula differs from the one in periodic_reify because we do not always round up */
765	if (w->interval)
766	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1803	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1804	}
		1805	else
		1806	((WT)w)->at = w->offset;
767		1807
768	ev_start ((W)w, ++periodiccnt);	1808	ev_start (EV_A_ (W)w, ++periodiccnt);
769	array_needsize (periodics, periodicmax, periodiccnt, );	1809	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
770	periodics [periodiccnt - 1] = w;	1810	periodics [periodiccnt - 1] = (WT)w;
771	upheap ((WT *)periodics, periodiccnt - 1);	1811	upheap (periodics, periodiccnt - 1);
772	}
773		1812
774	void	1813	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1814	}
		1815
		1816	void noinline
775	evperiodic_stop (struct ev_periodic *w)	1817	ev_periodic_stop (EV_P_ ev_periodic *w)
776	{	1818	{
777	ev_clear ((W)w);	1819	clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1820	if (expect_false (!ev_is_active (w)))
779	return;	1821	return;
780		1822
781	if (w->active < periodiccnt--)	1823	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1824
		1825	{
		1826	int active = ((W)w)->active;
		1827
		1828	if (expect_true (--active < --periodiccnt))
782	{	1829	{
783	periodics [w->active - 1] = periodics [periodiccnt];	1830	periodics [active] = periodics [periodiccnt];
784	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1831	adjustheap (periodics, periodiccnt, active);
785	}	1832	}
		1833	}
786		1834
787	ev_stop ((W)w);	1835	ev_stop (EV_A_ (W)w);
788	}	1836	}
789		1837
790	void	1838	void noinline
		1839	ev_periodic_again (EV_P_ ev_periodic *w)
		1840	{
		1841	/* TODO: use adjustheap and recalculation */
		1842	ev_periodic_stop (EV_A_ w);
		1843	ev_periodic_start (EV_A_ w);
		1844	}
		1845	#endif
		1846
		1847	#ifndef SA_RESTART
		1848	# define SA_RESTART 0
		1849	#endif
		1850
		1851	void noinline
791	evsignal_start (struct ev_signal *w)	1852	ev_signal_start (EV_P_ ev_signal *w)
792	{	1853	{
		1854	#if EV_MULTIPLICITY
		1855	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1856	#endif
793	if (ev_is_active (w))	1857	if (expect_false (ev_is_active (w)))
794	return;	1858	return;
795		1859
796	ev_start ((W)w, 1);	1860	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1861
		1862	{
		1863	#ifndef _WIN32
		1864	sigset_t full, prev;
		1865	sigfillset (&full);
		1866	sigprocmask (SIG_SETMASK, &full, &prev);
		1867	#endif
		1868
797	array_needsize (signals, signalmax, w->signum, signals_init);	1869	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1870
		1871	#ifndef _WIN32
		1872	sigprocmask (SIG_SETMASK, &prev, 0);
		1873	#endif
		1874	}
		1875
		1876	ev_start (EV_A_ (W)w, 1);
798	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1877	wlist_add (&signals [w->signum - 1].head, (WL)w);
799		1878
800	if (!w->next)	1879	if (!((WL)w)->next)
801	{	1880	{
		1881	#if _WIN32
		1882	signal (w->signum, sighandler);
		1883	#else
802	struct sigaction sa;	1884	struct sigaction sa;
803	sa.sa_handler = sighandler;	1885	sa.sa_handler = sighandler;
804	sigfillset (&sa.sa_mask);	1886	sigfillset (&sa.sa_mask);
805	sa.sa_flags = 0;	1887	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
806	sigaction (w->signum, &sa, 0);	1888	sigaction (w->signum, &sa, 0);
		1889	#endif
807	}	1890	}
808	}	1891	}
809		1892
810	void	1893	void noinline
811	evsignal_stop (struct ev_signal *w)	1894	ev_signal_stop (EV_P_ ev_signal *w)
812	{	1895	{
813	ev_clear ((W)w);	1896	clear_pending (EV_A_ (W)w);
814	if (!ev_is_active (w))	1897	if (expect_false (!ev_is_active (w)))
815	return;	1898	return;
816		1899
817	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1900	wlist_del (&signals [w->signum - 1].head, (WL)w);
818	ev_stop ((W)w);	1901	ev_stop (EV_A_ (W)w);
819		1902
820	if (!signals [w->signum - 1].head)	1903	if (!signals [w->signum - 1].head)
821	signal (w->signum, SIG_DFL);	1904	signal (w->signum, SIG_DFL);
822	}	1905	}
823		1906
824	void evidle_start (struct ev_idle *w)	1907	void
		1908	ev_child_start (EV_P_ ev_child *w)
825	{	1909	{
		1910	#if EV_MULTIPLICITY
		1911	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1912	#endif
826	if (ev_is_active (w))	1913	if (expect_false (ev_is_active (w)))
827	return;	1914	return;
828		1915
829	ev_start ((W)w, ++idlecnt);	1916	ev_start (EV_A_ (W)w, 1);
830	array_needsize (idles, idlemax, idlecnt, );	1917	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
831	idles [idlecnt - 1] = w;
832	}	1918	}
833		1919
834	void evidle_stop (struct ev_idle *w)	1920	void
		1921	ev_child_stop (EV_P_ ev_child *w)
835	{	1922	{
836	ev_clear ((W)w);	1923	clear_pending (EV_A_ (W)w);
837	if (ev_is_active (w))	1924	if (expect_false (!ev_is_active (w)))
838	return;	1925	return;
839		1926
840	idles [w->active - 1] = idles [--idlecnt];	1927	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
841	ev_stop ((W)w);	1928	ev_stop (EV_A_ (W)w);
842	}	1929	}
843		1930
		1931	#if EV_STAT_ENABLE
		1932
		1933	# ifdef _WIN32
		1934	# undef lstat
		1935	# define lstat(a,b) _stati64 (a,b)
		1936	# endif
		1937
		1938	#define DEF_STAT_INTERVAL 5.0074891
		1939	#define MIN_STAT_INTERVAL 0.1074891
		1940
		1941	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1942
		1943	#if EV_USE_INOTIFY
		1944	# define EV_INOTIFY_BUFSIZE 8192
		1945
		1946	static void noinline
		1947	infy_add (EV_P_ ev_stat *w)
		1948	{
		1949	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);
		1950
		1951	if (w->wd < 0)
		1952	{
		1953	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1954
		1955	/* monitor some parent directory for speedup hints */
		1956	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1957	{
		1958	char path [4096];
		1959	strcpy (path, w->path);
		1960
		1961	do
		1962	{
		1963	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1964	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1965
		1966	char *pend = strrchr (path, '/');
		1967
		1968	if (!pend)
		1969	break; /* whoops, no '/', complain to your admin */
		1970
		1971	*pend = 0;
		1972	w->wd = inotify_add_watch (fs_fd, path, mask);
		1973	}
		1974	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1975	}
		1976	}
		1977	else
		1978	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1979
		1980	if (w->wd >= 0)
		1981	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1982	}
		1983
		1984	static void noinline
		1985	infy_del (EV_P_ ev_stat *w)
		1986	{
		1987	int slot;
		1988	int wd = w->wd;
		1989
		1990	if (wd < 0)
		1991	return;
		1992
		1993	w->wd = -2;
		1994	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1995	wlist_del (&fs_hash [slot].head, (WL)w);
		1996
		1997	/* remove this watcher, if others are watching it, they will rearm */
		1998	inotify_rm_watch (fs_fd, wd);
		1999	}
		2000
		2001	static void noinline
		2002	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2003	{
		2004	if (slot < 0)
		2005	/* overflow, need to check for all hahs slots */
		2006	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2007	infy_wd (EV_A_ slot, wd, ev);
		2008	else
		2009	{
		2010	WL w_;
		2011
		2012	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2013	{
		2014	ev_stat *w = (ev_stat *)w_;
		2015	w_ = w_->next; /* lets us remove this watcher and all before it */
		2016
		2017	if (w->wd == wd || wd == -1)
		2018	{
		2019	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2020	{
		2021	w->wd = -1;
		2022	infy_add (EV_A_ w); /* re-add, no matter what */
		2023	}
		2024
		2025	stat_timer_cb (EV_A_ &w->timer, 0);
		2026	}
		2027	}
		2028	}
		2029	}
		2030
		2031	static void
		2032	infy_cb (EV_P_ ev_io *w, int revents)
		2033	{
		2034	char buf [EV_INOTIFY_BUFSIZE];
		2035	struct inotify_event *ev = (struct inotify_event *)buf;
		2036	int ofs;
		2037	int len = read (fs_fd, buf, sizeof (buf));
		2038
		2039	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2040	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2041	}
		2042
		2043	void inline_size
		2044	infy_init (EV_P)
		2045	{
		2046	if (fs_fd != -2)
		2047	return;
		2048
		2049	fs_fd = inotify_init ();
		2050
		2051	if (fs_fd >= 0)
		2052	{
		2053	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2054	ev_set_priority (&fs_w, EV_MAXPRI);
		2055	ev_io_start (EV_A_ &fs_w);
		2056	}
		2057	}
		2058
		2059	void inline_size
		2060	infy_fork (EV_P)
		2061	{
		2062	int slot;
		2063
		2064	if (fs_fd < 0)
		2065	return;
		2066
		2067	close (fs_fd);
		2068	fs_fd = inotify_init ();
		2069
		2070	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2071	{
		2072	WL w_ = fs_hash [slot].head;
		2073	fs_hash [slot].head = 0;
		2074
		2075	while (w_)
		2076	{
		2077	ev_stat *w = (ev_stat *)w_;
		2078	w_ = w_->next; /* lets us add this watcher */
		2079
		2080	w->wd = -1;
		2081
		2082	if (fs_fd >= 0)
		2083	infy_add (EV_A_ w); /* re-add, no matter what */
		2084	else
		2085	ev_timer_start (EV_A_ &w->timer);
		2086	}
		2087
		2088	}
		2089	}
		2090
		2091	#endif
		2092
		2093	void
		2094	ev_stat_stat (EV_P_ ev_stat *w)
		2095	{
		2096	if (lstat (w->path, &w->attr) < 0)
		2097	w->attr.st_nlink = 0;
		2098	else if (!w->attr.st_nlink)
		2099	w->attr.st_nlink = 1;
		2100	}
		2101
		2102	static void noinline
		2103	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2104	{
		2105	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2106
		2107	/* we copy this here each the time so that */
		2108	/* prev has the old value when the callback gets invoked */
		2109	w->prev = w->attr;
		2110	ev_stat_stat (EV_A_ w);
		2111
		2112	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2113	if (
		2114	w->prev.st_dev != w->attr.st_dev
		2115	|| w->prev.st_ino != w->attr.st_ino
		2116	|| w->prev.st_mode != w->attr.st_mode
		2117	|| w->prev.st_nlink != w->attr.st_nlink
		2118	|| w->prev.st_uid != w->attr.st_uid
		2119	|| w->prev.st_gid != w->attr.st_gid
		2120	|| w->prev.st_rdev != w->attr.st_rdev
		2121	|| w->prev.st_size != w->attr.st_size
		2122	|| w->prev.st_atime != w->attr.st_atime
		2123	|| w->prev.st_mtime != w->attr.st_mtime
		2124	|| w->prev.st_ctime != w->attr.st_ctime
		2125	) {
		2126	#if EV_USE_INOTIFY
		2127	infy_del (EV_A_ w);
		2128	infy_add (EV_A_ w);
		2129	ev_stat_stat (EV_A_ w); /* avoid race... */
		2130	#endif
		2131
		2132	ev_feed_event (EV_A_ w, EV_STAT);
		2133	}
		2134	}
		2135
		2136	void
		2137	ev_stat_start (EV_P_ ev_stat *w)
		2138	{
		2139	if (expect_false (ev_is_active (w)))
		2140	return;
		2141
		2142	/* since we use memcmp, we need to clear any padding data etc. */
		2143	memset (&w->prev, 0, sizeof (ev_statdata));
		2144	memset (&w->attr, 0, sizeof (ev_statdata));
		2145
		2146	ev_stat_stat (EV_A_ w);
		2147
		2148	if (w->interval < MIN_STAT_INTERVAL)
		2149	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2150
		2151	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2152	ev_set_priority (&w->timer, ev_priority (w));
		2153
		2154	#if EV_USE_INOTIFY
		2155	infy_init (EV_A);
		2156
		2157	if (fs_fd >= 0)
		2158	infy_add (EV_A_ w);
		2159	else
		2160	#endif
		2161	ev_timer_start (EV_A_ &w->timer);
		2162
		2163	ev_start (EV_A_ (W)w, 1);
		2164	}
		2165
		2166	void
		2167	ev_stat_stop (EV_P_ ev_stat *w)
		2168	{
		2169	clear_pending (EV_A_ (W)w);
		2170	if (expect_false (!ev_is_active (w)))
		2171	return;
		2172
		2173	#if EV_USE_INOTIFY
		2174	infy_del (EV_A_ w);
		2175	#endif
		2176	ev_timer_stop (EV_A_ &w->timer);
		2177
		2178	ev_stop (EV_A_ (W)w);
		2179	}
		2180	#endif
		2181
		2182	#if EV_IDLE_ENABLE
		2183	void
		2184	ev_idle_start (EV_P_ ev_idle *w)
		2185	{
		2186	if (expect_false (ev_is_active (w)))
		2187	return;
		2188
		2189	pri_adjust (EV_A_ (W)w);
		2190
		2191	{
		2192	int active = ++idlecnt [ABSPRI (w)];
		2193
		2194	++idleall;
		2195	ev_start (EV_A_ (W)w, active);
		2196
		2197	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2198	idles [ABSPRI (w)][active - 1] = w;
		2199	}
		2200	}
		2201
		2202	void
		2203	ev_idle_stop (EV_P_ ev_idle *w)
		2204	{
		2205	clear_pending (EV_A_ (W)w);
		2206	if (expect_false (!ev_is_active (w)))
		2207	return;
		2208
		2209	{
		2210	int active = ((W)w)->active;
		2211
		2212	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2213	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2214
		2215	ev_stop (EV_A_ (W)w);
		2216	--idleall;
		2217	}
		2218	}
		2219	#endif
		2220
		2221	void
844	void evprepare_start (struct ev_prepare *w)	2222	ev_prepare_start (EV_P_ ev_prepare *w)
845	{	2223	{
846	if (ev_is_active (w))	2224	if (expect_false (ev_is_active (w)))
847	return;	2225	return;
848		2226
849	ev_start ((W)w, ++preparecnt);	2227	ev_start (EV_A_ (W)w, ++preparecnt);
850	array_needsize (prepares, preparemax, preparecnt, );	2228	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
851	prepares [preparecnt - 1] = w;	2229	prepares [preparecnt - 1] = w;
852	}	2230	}
853		2231
		2232	void
854	void evprepare_stop (struct ev_prepare *w)	2233	ev_prepare_stop (EV_P_ ev_prepare *w)
855	{	2234	{
856	ev_clear ((W)w);	2235	clear_pending (EV_A_ (W)w);
857	if (ev_is_active (w))	2236	if (expect_false (!ev_is_active (w)))
858	return;	2237	return;
859		2238
		2239	{
		2240	int active = ((W)w)->active;
860	prepares [w->active - 1] = prepares [--preparecnt];	2241	prepares [active - 1] = prepares [--preparecnt];
		2242	((W)prepares [active - 1])->active = active;
		2243	}
		2244
861	ev_stop ((W)w);	2245	ev_stop (EV_A_ (W)w);
862	}	2246	}
863		2247
		2248	void
864	void evcheck_start (struct ev_check *w)	2249	ev_check_start (EV_P_ ev_check *w)
865	{	2250	{
866	if (ev_is_active (w))	2251	if (expect_false (ev_is_active (w)))
867	return;	2252	return;
868		2253
869	ev_start ((W)w, ++checkcnt);	2254	ev_start (EV_A_ (W)w, ++checkcnt);
870	array_needsize (checks, checkmax, checkcnt, );	2255	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
871	checks [checkcnt - 1] = w;	2256	checks [checkcnt - 1] = w;
872	}	2257	}
873		2258
		2259	void
874	void evcheck_stop (struct ev_check *w)	2260	ev_check_stop (EV_P_ ev_check *w)
875	{	2261	{
876	ev_clear ((W)w);	2262	clear_pending (EV_A_ (W)w);
877	if (ev_is_active (w))	2263	if (expect_false (!ev_is_active (w)))
878	return;	2264	return;
879		2265
		2266	{
		2267	int active = ((W)w)->active;
880	checks [w->active - 1] = checks [--checkcnt];	2268	checks [active - 1] = checks [--checkcnt];
		2269	((W)checks [active - 1])->active = active;
		2270	}
		2271
881	ev_stop ((W)w);	2272	ev_stop (EV_A_ (W)w);
882	}	2273	}
		2274
		2275	#if EV_EMBED_ENABLE
		2276	void noinline
		2277	ev_embed_sweep (EV_P_ ev_embed *w)
		2278	{
		2279	ev_loop (w->other, EVLOOP_NONBLOCK);
		2280	}
		2281
		2282	static void
		2283	embed_io_cb (EV_P_ ev_io *io, int revents)
		2284	{
		2285	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2286
		2287	if (ev_cb (w))
		2288	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2289	else
		2290	ev_loop (w->other, EVLOOP_NONBLOCK);
		2291	}
		2292
		2293	static void
		2294	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2295	{
		2296	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2297
		2298	{
		2299	struct ev_loop *loop = w->other;
		2300
		2301	while (fdchangecnt)
		2302	{
		2303	fd_reify (EV_A);
		2304	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2305	}
		2306	}
		2307	}
		2308
		2309	#if 0
		2310	static void
		2311	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2312	{
		2313	ev_idle_stop (EV_A_ idle);
		2314	}
		2315	#endif
		2316
		2317	void
		2318	ev_embed_start (EV_P_ ev_embed *w)
		2319	{
		2320	if (expect_false (ev_is_active (w)))
		2321	return;
		2322
		2323	{
		2324	struct ev_loop *loop = w->other;
		2325	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2326	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2327	}
		2328
		2329	ev_set_priority (&w->io, ev_priority (w));
		2330	ev_io_start (EV_A_ &w->io);
		2331
		2332	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2333	ev_set_priority (&w->prepare, EV_MINPRI);
		2334	ev_prepare_start (EV_A_ &w->prepare);
		2335
		2336	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2337
		2338	ev_start (EV_A_ (W)w, 1);
		2339	}
		2340
		2341	void
		2342	ev_embed_stop (EV_P_ ev_embed *w)
		2343	{
		2344	clear_pending (EV_A_ (W)w);
		2345	if (expect_false (!ev_is_active (w)))
		2346	return;
		2347
		2348	ev_io_stop (EV_A_ &w->io);
		2349	ev_prepare_stop (EV_A_ &w->prepare);
		2350
		2351	ev_stop (EV_A_ (W)w);
		2352	}
		2353	#endif
		2354
		2355	#if EV_FORK_ENABLE
		2356	void
		2357	ev_fork_start (EV_P_ ev_fork *w)
		2358	{
		2359	if (expect_false (ev_is_active (w)))
		2360	return;
		2361
		2362	ev_start (EV_A_ (W)w, ++forkcnt);
		2363	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2364	forks [forkcnt - 1] = w;
		2365	}
		2366
		2367	void
		2368	ev_fork_stop (EV_P_ ev_fork *w)
		2369	{
		2370	clear_pending (EV_A_ (W)w);
		2371	if (expect_false (!ev_is_active (w)))
		2372	return;
		2373
		2374	{
		2375	int active = ((W)w)->active;
		2376	forks [active - 1] = forks [--forkcnt];
		2377	((W)forks [active - 1])->active = active;
		2378	}
		2379
		2380	ev_stop (EV_A_ (W)w);
		2381	}
		2382	#endif
883		2383
884	/*****************************************************************************/	2384	/*****************************************************************************/
885		2385
886	struct ev_once	2386	struct ev_once
887	{	2387	{
888	struct ev_io io;	2388	ev_io io;
889	struct ev_timer to;	2389	ev_timer to;
890	void (*cb)(int revents, void *arg);	2390	void (*cb)(int revents, void *arg);
891	void *arg;	2391	void *arg;
892	};	2392	};
893		2393
894	static void	2394	static void
895	once_cb (struct ev_once *once, int revents)	2395	once_cb (EV_P_ struct ev_once *once, int revents)
896	{	2396	{
897	void (*cb)(int revents, void *arg) = once->cb;	2397	void (*cb)(int revents, void *arg) = once->cb;
898	void *arg = once->arg;	2398	void *arg = once->arg;
899		2399
900	evio_stop (&once->io);	2400	ev_io_stop (EV_A_ &once->io);
901	evtimer_stop (&once->to);	2401	ev_timer_stop (EV_A_ &once->to);
902	free (once);	2402	ev_free (once);
903		2403
904	cb (revents, arg);	2404	cb (revents, arg);
905	}	2405	}
906		2406
907	static void	2407	static void
908	once_cb_io (struct ev_io *w, int revents)	2408	once_cb_io (EV_P_ ev_io *w, int revents)
909	{	2409	{
910	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2410	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
911	}	2411	}
912		2412
913	static void	2413	static void
914	once_cb_to (struct ev_timer *w, int revents)	2414	once_cb_to (EV_P_ ev_timer *w, int revents)
915	{	2415	{
916	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2416	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
917	}	2417	}
918		2418
919	void	2419	void
920	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2420	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
921	{	2421	{
922	struct ev_once *once = malloc (sizeof (struct ev_once));	2422	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
923		2423
924	if (!once)	2424	if (expect_false (!once))
925	cb (EV_ERROR, arg);	2425	{
926	else	2426	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		2427	return;
927	{	2428	}
		2429
928	once->cb = cb;	2430	once->cb = cb;
929	once->arg = arg;	2431	once->arg = arg;
930		2432
931	evw_init (&once->io, once_cb_io);	2433	ev_init (&once->io, once_cb_io);
932
933	if (fd >= 0)	2434	if (fd >= 0)
934	{	2435	{
935	evio_set (&once->io, fd, events);	2436	ev_io_set (&once->io, fd, events);
936	evio_start (&once->io);	2437	ev_io_start (EV_A_ &once->io);
937	}	2438	}
938		2439
939	evw_init (&once->to, once_cb_to);	2440	ev_init (&once->to, once_cb_to);
940
941	if (timeout >= 0.)	2441	if (timeout >= 0.)
942	{	2442	{
943	evtimer_set (&once->to, timeout, 0.);	2443	ev_timer_set (&once->to, timeout, 0.);
944	evtimer_start (&once->to);	2444	ev_timer_start (EV_A_ &once->to);
945	}
946	}
947	}
948
949	/*****************************************************************************/
950
951	#if 0
952
953	struct ev_io wio;
954
955	static void
956	sin_cb (struct ev_io *w, int revents)
957	{
958	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
959	}
960
961	static void
962	ocb (struct ev_timer *w, int revents)
963	{
964	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
965	evtimer_stop (w);
966	evtimer_start (w);
967	}
968
969	static void
970	scb (struct ev_signal *w, int revents)
971	{
972	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
973	evio_stop (&wio);
974	evio_start (&wio);
975	}
976
977	static void
978	gcb (struct ev_signal *w, int revents)
979	{
980	fprintf (stderr, "generic %x\n", revents);
981
982	}
983
984	int main (void)
985	{
986	ev_init (0);
987
988	evio_init (&wio, sin_cb, 0, EV_READ);
989	evio_start (&wio);
990
991	struct ev_timer t[10000];
992
993	#if 0
994	int i;
995	for (i = 0; i < 10000; ++i)
996	{	2445	}
997	struct ev_timer *w = t + i;
998	evw_init (w, ocb, i);
999	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1000	evtimer_start (w);
1001	if (drand48 () < 0.5)
1002	evtimer_stop (w);
1003	}
1004	#endif
1005
1006	struct ev_timer t1;
1007	evtimer_init (&t1, ocb, 5, 10);
1008	evtimer_start (&t1);
1009
1010	struct ev_signal sig;
1011	evsignal_init (&sig, scb, SIGQUIT);
1012	evsignal_start (&sig);
1013
1014	struct ev_check cw;
1015	evcheck_init (&cw, gcb);
1016	evcheck_start (&cw);
1017
1018	struct ev_idle iw;
1019	evidle_init (&iw, gcb);
1020	evidle_start (&iw);
1021
1022	ev_loop (0);
1023
1024	return 0;
1025	}	2446	}
1026		2447
		2448	#if EV_MULTIPLICITY
		2449	#include "ev_wrap.h"
1027	#endif	2450	#endif
1028		2451
		2452	#ifdef __cplusplus
		2453	}
		2454	#endif
1029		2455
1030
1031

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