[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.6 by root, Tue Oct 30 23:55:29 2007 UTC vs.
Revision 1.233 by root, Tue May 6 23:34:16 2008 UTC

…		…
		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are met:
		9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
		45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
		49	# include "config.h"
		50	# endif
		51
		52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
		54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
		57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
		74	# endif
		75
		76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
		82	# endif
		83
		84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
		86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
		90	# endif
		91
		92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
		98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
		132	#endif
		133
1	#include <math.h>	134	#include <math.h>
2	#include <stdlib.h>	135	#include <stdlib.h>
		136	#include <fcntl.h>
		137	#include <stddef.h>
3		138
4	#include <stdio.h>	139	#include <stdio.h>
5		140
6	#include <assert.h>	141	#include <assert.h>
7	#include <errno.h>	142	#include <errno.h>
8	#include <sys/time.h>	143	#include <sys/types.h>
9	#include <time.h>	144	#include <time.h>
10		145
		146	#include <signal.h>
		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
		154	#ifndef _WIN32
		155	# include <sys/time.h>
		156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
		163	# endif
		164	#endif
		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
		167
		168	#ifndef EV_USE_MONOTONIC
		169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
		178	#endif
		179
		180	#ifndef EV_USE_SELECT
		181	# define EV_USE_SELECT 1
		182	#endif
		183
		184	#ifndef EV_USE_POLL
		185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
		190	#endif
		191
		192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
		196	# define EV_USE_EPOLL 0
		197	# endif
		198	#endif
		199
		200	#ifndef EV_USE_KQUEUE
		201	# define EV_USE_KQUEUE 0
		202	#endif
		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
		208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
		213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		241
11	#ifdef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
		243	# undef EV_USE_MONOTONIC
12	# define HAVE_MONOTONIC 1	244	# define EV_USE_MONOTONIC 0
		245	#endif
		246
		247	#ifndef CLOCK_REALTIME
		248	# undef EV_USE_REALTIME
		249	# define EV_USE_REALTIME 0
		250	#endif
		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
13	#endif	260	# endif
		261	#endif
14		262
15	#define HAVE_REALTIME 1	263	#if EV_USE_INOTIFY
16	#define HAVE_EPOLL 1	264	# include <sys/inotify.h>
17	#define HAVE_SELECT 1	265	#endif
		266
		267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
		283	/**/
		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
18		294
19	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
20	#define MAX_BLOCKTIME 60.	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		297	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
21		298
		299	#if __GNUC__ >= 4
		300	# define expect(expr,value) __builtin_expect ((expr),(value))
		301	# define noinline __attribute__ ((noinline))
		302	#else
		303	# define expect(expr,value) (expr)
		304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
		308	#endif
		309
		310	#define expect_false(expr) expect ((expr) != 0, 0)
		311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
		319
		320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
		326	typedef ev_watcher *W;
		327	typedef ev_watcher_list *WL;
		328	typedef ev_watcher_time *WT;
		329
		330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
		336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
		338
		339	#ifdef _WIN32
		340	# include "ev_win32.c"
		341	#endif
		342
		343	/*****************************************************************************/
		344
		345	static void (syserr_cb)(const char msg);
		346
		347	void
		348	ev_set_syserr_cb (void (cb)(const char msg))
		349	{
		350	syserr_cb = cb;
		351	}
		352
		353	static void noinline
		354	syserr (const char *msg)
		355	{
		356	if (!msg)
		357	msg = "(libev) system error";
		358
		359	if (syserr_cb)
		360	syserr_cb (msg);
		361	else
		362	{
		363	perror (msg);
		364	abort ();
		365	}
		366	}
		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
		383	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
		384
		385	void
		386	ev_set_allocator (void (cb)(void *ptr, long size))
		387	{
		388	alloc = cb;
		389	}
		390
		391	inline_speed void *
		392	ev_realloc (void *ptr, long size)
		393	{
		394	ptr = alloc (ptr, size);
		395
		396	if (!ptr && size)
		397	{
		398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		399	abort ();
		400	}
		401
		402	return ptr;
		403	}
		404
		405	#define ev_malloc(size) ev_realloc (0, (size))
		406	#define ev_free(ptr) ev_realloc ((ptr), 0)
		407
		408	/*****************************************************************************/
		409
		410	typedef struct
		411	{
		412	WL head;
		413	unsigned char events;
		414	unsigned char reify;
		415	#if EV_SELECT_IS_WINSOCKET
		416	SOCKET handle;
		417	#endif
		418	} ANFD;
		419
		420	typedef struct
		421	{
		422	W w;
		423	int events;
		424	} ANPENDING;
		425
		426	#if EV_USE_INOTIFY
		427	typedef struct
		428	{
		429	WL head;
		430	} ANFS;
		431	#endif
		432
		433	#if EV_MULTIPLICITY
		434
		435	struct ev_loop
		436	{
		437	ev_tstamp ev_rt_now;
		438	#define ev_rt_now ((loop)->ev_rt_now)
		439	#define VAR(name,decl) decl;
		440	#include "ev_vars.h"
		441	#undef VAR
		442	};
22	#include "ev.h"	443	#include "ev_wrap.h"
23		444
24	struct ev_watcher {	445	static struct ev_loop default_loop_struct;
25	EV_WATCHER (ev_watcher);	446	struct ev_loop *ev_default_loop_ptr;
26	};
27		447
28	struct ev_watcher_list {	448	#else
29	EV_WATCHER_LIST (ev_watcher_list);
30	};
31		449
32	static ev_tstamp now, diff; /* monotonic clock */
33	ev_tstamp ev_now;	450	ev_tstamp ev_rt_now;
34	int ev_method;	451	#define VAR(name,decl) static decl;
		452	#include "ev_vars.h"
		453	#undef VAR
35		454
36	static int have_monotonic; /* runtime */	455	static int ev_default_loop_ptr;
37		456
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	457	#endif
39	static void (*method_modify)(int fd, int oev, int nev);	458
40	static void (*method_poll)(ev_tstamp timeout);	459	/*****************************************************************************/
41		460
42	ev_tstamp	461	ev_tstamp
43	ev_time (void)	462	ev_time (void)
44	{	463	{
45	#if HAVE_REALTIME	464	#if EV_USE_REALTIME
46	struct timespec ts;	465	struct timespec ts;
47	clock_gettime (CLOCK_REALTIME, &ts);	466	clock_gettime (CLOCK_REALTIME, &ts);
48	return ts.tv_sec + ts.tv_nsec * 1e-9;	467	return ts.tv_sec + ts.tv_nsec * 1e-9;
49	#else	468	#else
50	struct timeval tv;	469	struct timeval tv;
51	gettimeofday (&tv, 0);	470	gettimeofday (&tv, 0);
52	return tv.tv_sec + tv.tv_usec * 1e-6;	471	return tv.tv_sec + tv.tv_usec * 1e-6;
53	#endif	472	#endif
54	}	473	}
55		474
56	static ev_tstamp	475	ev_tstamp inline_size
57	get_clock (void)	476	get_clock (void)
58	{	477	{
59	#if HAVE_MONOTONIC	478	#if EV_USE_MONOTONIC
60	if (have_monotonic)	479	if (expect_true (have_monotonic))
61	{	480	{
62	struct timespec ts;	481	struct timespec ts;
63	clock_gettime (CLOCK_MONOTONIC, &ts);	482	clock_gettime (CLOCK_MONOTONIC, &ts);
64	return ts.tv_sec + ts.tv_nsec * 1e-9;	483	return ts.tv_sec + ts.tv_nsec * 1e-9;
65	}	484	}
66	#endif	485	#endif
67		486
68	return ev_time ();	487	return ev_time ();
69	}	488	}
70		489
		490	#if EV_MULTIPLICITY
		491	ev_tstamp
		492	ev_now (EV_P)
		493	{
		494	return ev_rt_now;
		495	}
		496	#endif
		497
		498	void
		499	ev_sleep (ev_tstamp delay)
		500	{
		501	if (delay > 0.)
		502	{
		503	#if EV_USE_NANOSLEEP
		504	struct timespec ts;
		505
		506	ts.tv_sec = (time_t)delay;
		507	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		508
		509	nanosleep (&ts, 0);
		510	#elif defined(_WIN32)
		511	Sleep ((unsigned long)(delay * 1e3));
		512	#else
		513	struct timeval tv;
		514
		515	tv.tv_sec = (time_t)delay;
		516	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		517
		518	select (0, 0, 0, 0, &tv);
		519	#endif
		520	}
		521	}
		522
		523	/*****************************************************************************/
		524
		525	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
		526
		527	int inline_size
		528	array_nextsize (int elem, int cur, int cnt)
		529	{
		530	int ncur = cur + 1;
		531
		532	do
		533	ncur <<= 1;
		534	while (cnt > ncur);
		535
		536	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		537	if (elem * ncur > MALLOC_ROUND - sizeof (void ) 4)
		538	{
		539	ncur *= elem;
		540	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void ) 4) & ~(MALLOC_ROUND - 1);
		541	ncur = ncur - sizeof (void ) 4;
		542	ncur /= elem;
		543	}
		544
		545	return ncur;
		546	}
		547
		548	static noinline void *
		549	array_realloc (int elem, void base, int cur, int cnt)
		550	{
		551	cur = array_nextsize (elem, cur, cnt);
		552	return ev_realloc (base, elem * *cur);
		553	}
		554
71	#define array_needsize(base,cur,cnt,init) \	555	#define array_needsize(type,base,cur,cnt,init) \
72	if ((cnt) > cur) \	556	if (expect_false ((cnt) > (cur))) \
73	{ \	557	{ \
74	int newcnt = cur ? cur << 1 : 16; \	558	int ocur_ = (cur); \
75	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	559	(base) = (type *)array_realloc \
76	base = realloc (base, sizeof (base) (newcnt)); \	560	(sizeof (type), (base), &(cur), (cnt)); \
77	init (base + cur, newcnt - cur); \	561	init ((base) + (ocur_), (cur) - ocur_); \
78	cur = newcnt; \	562	}
		563
		564	#if 0
		565	#define array_slim(type,stem) \
		566	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		567	{ \
		568	stem ## max = array_roundsize (stem ## cnt >> 1); \
		569	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		570	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		571	}
		572	#endif
		573
		574	#define array_free(stem, idx) \
		575	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		576
		577	/*****************************************************************************/
		578
		579	void noinline
		580	ev_feed_event (EV_P_ void *w, int revents)
		581	{
		582	W w_ = (W)w;
		583	int pri = ABSPRI (w_);
		584
		585	if (expect_false (w_->pending))
		586	pendings [pri][w_->pending - 1].events \|= revents;
		587	else
79	}	588	{
		589	w_->pending = ++pendingcnt [pri];
		590	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		591	pendings [pri][w_->pending - 1].w = w_;
		592	pendings [pri][w_->pending - 1].events = revents;
		593	}
		594	}
80		595
81	typedef struct	596	void inline_speed
		597	queue_events (EV_P_ W *events, int eventcnt, int type)
82	{	598	{
83	struct ev_io *head;	599	int i;
84	unsigned char wev, rev; /* want, received event set */
85	} ANFD;
86		600
87	static ANFD *anfds;	601	for (i = 0; i < eventcnt; ++i)
88	static int anfdmax;	602	ev_feed_event (EV_A_ events [i], type);
		603	}
89		604
90	static int *fdchanges;	605	/*****************************************************************************/
91	static int fdchangemax, fdchangecnt;
92		606
93	static void	607	void inline_size
94	anfds_init (ANFD *base, int count)	608	anfds_init (ANFD *base, int count)
95	{	609	{
96	while (count--)	610	while (count--)
97	{	611	{
98	base->head = 0;	612	base->head = 0;
99	base->wev = base->rev = EV_NONE;	613	base->events = EV_NONE;
		614	base->reify = 0;
		615
100	++base;	616	++base;
101	}	617	}
102	}	618	}
103		619
104	typedef struct	620	void inline_speed
105	{
106	struct ev_watcher *w;
107	int events;
108	} ANPENDING;
109
110	static ANPENDING *pendings;
111	static int pendingmax, pendingcnt;
112
113	static void
114	event (struct ev_watcher *w, int events)
115	{
116	w->pending = ++pendingcnt;
117	array_needsize (pendings, pendingmax, pendingcnt, );
118	pendings [pendingcnt - 1].w = w;
119	pendings [pendingcnt - 1].events = events;
120	}
121
122	static void
123	fd_event (int fd, int events)	621	fd_event (EV_P_ int fd, int revents)
124	{	622	{
125	ANFD *anfd = anfds + fd;	623	ANFD *anfd = anfds + fd;
126	struct ev_io *w;	624	ev_io *w;
127		625
128	for (w = anfd->head; w; w = w->next)	626	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
129	{	627	{
130	int ev = w->events & events;	628	int ev = w->events & revents;
131		629
132	if (ev)	630	if (ev)
133	event ((struct ev_watcher *)w, ev);	631	ev_feed_event (EV_A_ (W)w, ev);
134	}
135	}
136
137	static struct ev_timer **atimers;
138	static int atimermax, atimercnt;
139
140	static struct ev_timer **rtimers;
141	static int rtimermax, rtimercnt;
142
143	static void
144	upheap (struct ev_timer **timers, int k)
145	{
146	struct ev_timer *w = timers [k];
147
148	while (k && timers [k >> 1]->at > w->at)
149	{	632	}
150	timers [k] = timers [k >> 1];
151	timers [k]->active = k + 1;
152	k >>= 1;
153	}
154
155	timers [k] = w;
156	timers [k]->active = k + 1;
157
158	}	633	}
159		634
160	static void	635	void
161	downheap (struct ev_timer **timers, int N, int k)	636	ev_feed_fd_event (EV_P_ int fd, int revents)
162	{	637	{
163	struct ev_timer *w = timers [k];	638	if (fd >= 0 && fd < anfdmax)
164		639	fd_event (EV_A_ fd, revents);
165	while (k < (N >> 1))
166	{
167	int j = k << 1;
168
169	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
170	++j;
171
172	if (w->at <= timers [j]->at)
173	break;
174
175	timers [k] = timers [j];
176	timers [k]->active = k + 1;
177	k = j;
178	}
179
180	timers [k] = w;
181	timers [k]->active = k + 1;
182	}	640	}
183		641
184	static struct ev_signal **signals;	642	void inline_size
185	static int signalmax;	643	fd_reify (EV_P)
186
187	static void
188	signals_init (struct ev_signal **base, int count)
189	{
190	while (count--)
191	*base++ = 0;
192	}
193
194	#if HAVE_EPOLL
195	# include "ev_epoll.c"
196	#endif
197	#if HAVE_SELECT
198	# include "ev_select.c"
199	#endif
200
201	int ev_init (int flags)
202	{
203	#if HAVE_MONOTONIC
204	{
205	struct timespec ts;
206	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
207	have_monotonic = 1;
208	}
209	#endif
210
211	ev_now = ev_time ();
212	now = get_clock ();
213	diff = ev_now - now;
214
215	#if HAVE_EPOLL
216	if (epoll_init (flags))
217	return ev_method;
218	#endif
219	#if HAVE_SELECT
220	if (select_init (flags))
221	return ev_method;
222	#endif
223
224	ev_method = EVMETHOD_NONE;
225	return ev_method;
226	}
227
228	void ev_prefork (void)
229	{
230	}
231
232	void ev_postfork_parent (void)
233	{
234	}
235
236	void ev_postfork_child (void)
237	{
238	#if HAVE_EPOLL
239	if (ev_method == EVMETHOD_EPOLL)
240	epoll_postfork_child ();
241	#endif
242	}
243
244	static void
245	fd_reify (void)
246	{	644	{
247	int i;	645	int i;
248		646
249	for (i = 0; i < fdchangecnt; ++i)	647	for (i = 0; i < fdchangecnt; ++i)
250	{	648	{
251	int fd = fdchanges [i];	649	int fd = fdchanges [i];
252	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
253	struct ev_io *w;	651	ev_io *w;
254		652
255	int wev = 0;	653	unsigned char events = 0;
256		654
257	for (w = anfd->head; w; w = w->next)	655	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
258	wev \|= w->events;	656	events \|= (unsigned char)w->events;
259		657
260	if (anfd->wev != wev)	658	#if EV_SELECT_IS_WINSOCKET
		659	if (events)
261	{	660	{
262	method_modify (fd, anfd->wev, wev);	661	unsigned long argp;
263	anfd->wev = wev;	662	#ifdef EV_FD_TO_WIN32_HANDLE
		663	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		664	#else
		665	anfd->handle = _get_osfhandle (fd);
		666	#endif
		667	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
264	}	668	}
		669	#endif
		670
		671	{
		672	unsigned char o_events = anfd->events;
		673	unsigned char o_reify = anfd->reify;
		674
		675	anfd->reify = 0;
		676	anfd->events = events;
		677
		678	if (o_events != events \|\| o_reify & EV_IOFDSET)
		679	backend_modify (EV_A_ fd, o_events, events);
		680	}
265	}	681	}
266		682
267	fdchangecnt = 0;	683	fdchangecnt = 0;
268	}	684	}
269		685
		686	void inline_size
		687	fd_change (EV_P_ int fd, int flags)
		688	{
		689	unsigned char reify = anfds [fd].reify;
		690	anfds [fd].reify \|= flags;
		691
		692	if (expect_true (!reify))
		693	{
		694	++fdchangecnt;
		695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		696	fdchanges [fdchangecnt - 1] = fd;
		697	}
		698	}
		699
		700	void inline_speed
		701	fd_kill (EV_P_ int fd)
		702	{
		703	ev_io *w;
		704
		705	while ((w = (ev_io *)anfds [fd].head))
		706	{
		707	ev_io_stop (EV_A_ w);
		708	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		709	}
		710	}
		711
		712	int inline_size
		713	fd_valid (int fd)
		714	{
		715	#ifdef _WIN32
		716	return _get_osfhandle (fd) != -1;
		717	#else
		718	return fcntl (fd, F_GETFD) != -1;
		719	#endif
		720	}
		721
		722	/* called on EBADF to verify fds */
		723	static void noinline
		724	fd_ebadf (EV_P)
		725	{
		726	int fd;
		727
		728	for (fd = 0; fd < anfdmax; ++fd)
		729	if (anfds [fd].events)
		730	if (!fd_valid (fd) == -1 && errno == EBADF)
		731	fd_kill (EV_A_ fd);
		732	}
		733
		734	/* called on ENOMEM in select/poll to kill some fds and retry */
		735	static void noinline
		736	fd_enomem (EV_P)
		737	{
		738	int fd;
		739
		740	for (fd = anfdmax; fd--; )
		741	if (anfds [fd].events)
		742	{
		743	fd_kill (EV_A_ fd);
		744	return;
		745	}
		746	}
		747
		748	/* usually called after fork if backend needs to re-arm all fds from scratch */
		749	static void noinline
		750	fd_rearm_all (EV_P)
		751	{
		752	int fd;
		753
		754	for (fd = 0; fd < anfdmax; ++fd)
		755	if (anfds [fd].events)
		756	{
		757	anfds [fd].events = 0;
		758	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
		759	}
		760	}
		761
		762	/*****************************************************************************/
		763
		764	/* towards the root */
		765	void inline_speed
		766	upheap (WT *heap, int k)
		767	{
		768	WT w = heap [k];
		769
		770	for (;;)
		771	{
		772	int p = k >> 1;
		773
		774	/* maybe we could use a dummy element at heap [0]? */
		775	if (!p \|\| heap [p]->at <= w->at)
		776	break;
		777
		778	heap [k] = heap [p];
		779	ev_active (heap [k]) = k;
		780	k = p;
		781	}
		782
		783	heap [k] = w;
		784	ev_active (heap [k]) = k;
		785	}
		786
		787	/* away from the root */
		788	void inline_speed
		789	downheap (WT *heap, int N, int k)
		790	{
		791	WT w = heap [k];
		792
		793	for (;;)
		794	{
		795	int c = k << 1;
		796
		797	if (c > N)
		798	break;
		799
		800	c += c < N && heap [c]->at > heap [c + 1]->at
		801	? 1 : 0;
		802
		803	if (w->at <= heap [c]->at)
		804	break;
		805
		806	heap [k] = heap [c];
		807	ev_active (heap [k]) = k;
		808
		809	k = c;
		810	}
		811
		812	heap [k] = w;
		813	ev_active (heap [k]) = k;
		814	}
		815
		816	void inline_size
		817	adjustheap (WT *heap, int N, int k)
		818	{
		819	upheap (heap, k);
		820	downheap (heap, N, k);
		821	}
		822
		823	/*****************************************************************************/
		824
		825	typedef struct
		826	{
		827	WL head;
		828	EV_ATOMIC_T gotsig;
		829	} ANSIG;
		830
		831	static ANSIG *signals;
		832	static int signalmax;
		833
		834	static EV_ATOMIC_T gotsig;
		835
		836	void inline_size
		837	signals_init (ANSIG *base, int count)
		838	{
		839	while (count--)
		840	{
		841	base->head = 0;
		842	base->gotsig = 0;
		843
		844	++base;
		845	}
		846	}
		847
		848	/*****************************************************************************/
		849
		850	void inline_speed
		851	fd_intern (int fd)
		852	{
		853	#ifdef _WIN32
		854	int arg = 1;
		855	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		856	#else
		857	fcntl (fd, F_SETFD, FD_CLOEXEC);
		858	fcntl (fd, F_SETFL, O_NONBLOCK);
		859	#endif
		860	}
		861
		862	static void noinline
		863	evpipe_init (EV_P)
		864	{
		865	if (!ev_is_active (&pipeev))
		866	{
		867	#if EV_USE_EVENTFD
		868	if ((evfd = eventfd (0, 0)) >= 0)
		869	{
		870	evpipe [0] = -1;
		871	fd_intern (evfd);
		872	ev_io_set (&pipeev, evfd, EV_READ);
		873	}
		874	else
		875	#endif
		876	{
		877	while (pipe (evpipe))
		878	syserr ("(libev) error creating signal/async pipe");
		879
		880	fd_intern (evpipe [0]);
		881	fd_intern (evpipe [1]);
		882	ev_io_set (&pipeev, evpipe [0], EV_READ);
		883	}
		884
		885	ev_io_start (EV_A_ &pipeev);
		886	ev_unref (EV_A); /* watcher should not keep loop alive */
		887	}
		888	}
		889
		890	void inline_size
		891	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		892	{
		893	if (!*flag)
		894	{
		895	int old_errno = errno; /* save errno because write might clobber it */
		896
		897	*flag = 1;
		898
		899	#if EV_USE_EVENTFD
		900	if (evfd >= 0)
		901	{
		902	uint64_t counter = 1;
		903	write (evfd, &counter, sizeof (uint64_t));
		904	}
		905	else
		906	#endif
		907	write (evpipe [1], &old_errno, 1);
		908
		909	errno = old_errno;
		910	}
		911	}
		912
270	static void	913	static void
271	call_pending ()	914	pipecb (EV_P_ ev_io *iow, int revents)
		915	{
		916	#if EV_USE_EVENTFD
		917	if (evfd >= 0)
		918	{
		919	uint64_t counter;
		920	read (evfd, &counter, sizeof (uint64_t));
		921	}
		922	else
		923	#endif
		924	{
		925	char dummy;
		926	read (evpipe [0], &dummy, 1);
		927	}
		928
		929	if (gotsig && ev_is_default_loop (EV_A))
		930	{
		931	int signum;
		932	gotsig = 0;
		933
		934	for (signum = signalmax; signum--; )
		935	if (signals [signum].gotsig)
		936	ev_feed_signal_event (EV_A_ signum + 1);
		937	}
		938
		939	#if EV_ASYNC_ENABLE
		940	if (gotasync)
		941	{
		942	int i;
		943	gotasync = 0;
		944
		945	for (i = asynccnt; i--; )
		946	if (asyncs [i]->sent)
		947	{
		948	asyncs [i]->sent = 0;
		949	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		950	}
		951	}
		952	#endif
		953	}
		954
		955	/*****************************************************************************/
		956
		957	static void
		958	ev_sighandler (int signum)
		959	{
		960	#if EV_MULTIPLICITY
		961	struct ev_loop *loop = &default_loop_struct;
		962	#endif
		963
		964	#if _WIN32
		965	signal (signum, ev_sighandler);
		966	#endif
		967
		968	signals [signum - 1].gotsig = 1;
		969	evpipe_write (EV_A_ &gotsig);
		970	}
		971
		972	void noinline
		973	ev_feed_signal_event (EV_P_ int signum)
		974	{
		975	WL w;
		976
		977	#if EV_MULTIPLICITY
		978	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		979	#endif
		980
		981	--signum;
		982
		983	if (signum < 0 \|\| signum >= signalmax)
		984	return;
		985
		986	signals [signum].gotsig = 0;
		987
		988	for (w = signals [signum].head; w; w = w->next)
		989	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		990	}
		991
		992	/*****************************************************************************/
		993
		994	static WL childs [EV_PID_HASHSIZE];
		995
		996	#ifndef _WIN32
		997
		998	static ev_signal childev;
		999
		1000	#ifndef WIFCONTINUED
		1001	# define WIFCONTINUED(status) 0
		1002	#endif
		1003
		1004	void inline_speed
		1005	child_reap (EV_P_ int chain, int pid, int status)
		1006	{
		1007	ev_child *w;
		1008	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
		1009
		1010	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		1011	{
		1012	if ((w->pid == pid \|\| !w->pid)
		1013	&& (!traced \|\| (w->flags & 1)))
		1014	{
		1015	ev_set_priority (w, EV_MAXPRI); /* need to do it now, this must be the same prio as the signal watcher itself */
		1016	w->rpid = pid;
		1017	w->rstatus = status;
		1018	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1019	}
		1020	}
		1021	}
		1022
		1023	#ifndef WCONTINUED
		1024	# define WCONTINUED 0
		1025	#endif
		1026
		1027	static void
		1028	childcb (EV_P_ ev_signal *sw, int revents)
		1029	{
		1030	int pid, status;
		1031
		1032	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1033	if (0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		1034	if (!WCONTINUED
		1035	\|\| errno != EINVAL
		1036	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
		1037	return;
		1038
		1039	/* make sure we are called again until all children have been reaped */
		1040	/* we need to do it this way so that the callback gets called before we continue */
		1041	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1042
		1043	child_reap (EV_A_ pid, pid, status);
		1044	if (EV_PID_HASHSIZE > 1)
		1045	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1046	}
		1047
		1048	#endif
		1049
		1050	/*****************************************************************************/
		1051
		1052	#if EV_USE_PORT
		1053	# include "ev_port.c"
		1054	#endif
		1055	#if EV_USE_KQUEUE
		1056	# include "ev_kqueue.c"
		1057	#endif
		1058	#if EV_USE_EPOLL
		1059	# include "ev_epoll.c"
		1060	#endif
		1061	#if EV_USE_POLL
		1062	# include "ev_poll.c"
		1063	#endif
		1064	#if EV_USE_SELECT
		1065	# include "ev_select.c"
		1066	#endif
		1067
		1068	int
		1069	ev_version_major (void)
		1070	{
		1071	return EV_VERSION_MAJOR;
		1072	}
		1073
		1074	int
		1075	ev_version_minor (void)
		1076	{
		1077	return EV_VERSION_MINOR;
		1078	}
		1079
		1080	/* return true if we are running with elevated privileges and should ignore env variables */
		1081	int inline_size
		1082	enable_secure (void)
		1083	{
		1084	#ifdef _WIN32
		1085	return 0;
		1086	#else
		1087	return getuid () != geteuid ()
		1088	\|\| getgid () != getegid ();
		1089	#endif
		1090	}
		1091
		1092	unsigned int
		1093	ev_supported_backends (void)
		1094	{
		1095	unsigned int flags = 0;
		1096
		1097	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		1098	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		1099	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		1100	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		1101	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		1102
		1103	return flags;
		1104	}
		1105
		1106	unsigned int
		1107	ev_recommended_backends (void)
		1108	{
		1109	unsigned int flags = ev_supported_backends ();
		1110
		1111	#ifndef __NetBSD__
		1112	/* kqueue is borked on everything but netbsd apparently */
		1113	/* it usually doesn't work correctly on anything but sockets and pipes */
		1114	flags &= ~EVBACKEND_KQUEUE;
		1115	#endif
		1116	#ifdef __APPLE__
		1117	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1118	flags &= ~EVBACKEND_POLL;
		1119	#endif
		1120
		1121	return flags;
		1122	}
		1123
		1124	unsigned int
		1125	ev_embeddable_backends (void)
		1126	{
		1127	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
		1128
		1129	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1130	/* please fix it and tell me how to detect the fix */
		1131	flags &= ~EVBACKEND_EPOLL;
		1132
		1133	return flags;
		1134	}
		1135
		1136	unsigned int
		1137	ev_backend (EV_P)
		1138	{
		1139	return backend;
		1140	}
		1141
		1142	unsigned int
		1143	ev_loop_count (EV_P)
		1144	{
		1145	return loop_count;
		1146	}
		1147
		1148	void
		1149	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1150	{
		1151	io_blocktime = interval;
		1152	}
		1153
		1154	void
		1155	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1156	{
		1157	timeout_blocktime = interval;
		1158	}
		1159
		1160	static void noinline
		1161	loop_init (EV_P_ unsigned int flags)
		1162	{
		1163	if (!backend)
		1164	{
		1165	#if EV_USE_MONOTONIC
		1166	{
		1167	struct timespec ts;
		1168	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1169	have_monotonic = 1;
		1170	}
		1171	#endif
		1172
		1173	ev_rt_now = ev_time ();
		1174	mn_now = get_clock ();
		1175	now_floor = mn_now;
		1176	rtmn_diff = ev_rt_now - mn_now;
		1177
		1178	io_blocktime = 0.;
		1179	timeout_blocktime = 0.;
		1180	backend = 0;
		1181	backend_fd = -1;
		1182	gotasync = 0;
		1183	#if EV_USE_INOTIFY
		1184	fs_fd = -2;
		1185	#endif
		1186
		1187	/* pid check not overridable via env */
		1188	#ifndef _WIN32
		1189	if (flags & EVFLAG_FORKCHECK)
		1190	curpid = getpid ();
		1191	#endif
		1192
		1193	if (!(flags & EVFLAG_NOENV)
		1194	&& !enable_secure ()
		1195	&& getenv ("LIBEV_FLAGS"))
		1196	flags = atoi (getenv ("LIBEV_FLAGS"));
		1197
		1198	if (!(flags & 0x0000ffffU))
		1199	flags \|= ev_recommended_backends ();
		1200
		1201	#if EV_USE_PORT
		1202	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1203	#endif
		1204	#if EV_USE_KQUEUE
		1205	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1206	#endif
		1207	#if EV_USE_EPOLL
		1208	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1209	#endif
		1210	#if EV_USE_POLL
		1211	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1212	#endif
		1213	#if EV_USE_SELECT
		1214	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1215	#endif
		1216
		1217	ev_init (&pipeev, pipecb);
		1218	ev_set_priority (&pipeev, EV_MAXPRI);
		1219	}
		1220	}
		1221
		1222	static void noinline
		1223	loop_destroy (EV_P)
272	{	1224	{
273	int i;	1225	int i;
274		1226
275	for (i = 0; i < pendingcnt; ++i)	1227	if (ev_is_active (&pipeev))
276	{	1228	{
277	ANPENDING *p = pendings + i;	1229	ev_ref (EV_A); /* signal watcher */
		1230	ev_io_stop (EV_A_ &pipeev);
278		1231
279	if (p->w)	1232	#if EV_USE_EVENTFD
		1233	if (evfd >= 0)
		1234	close (evfd);
		1235	#endif
		1236
		1237	if (evpipe [0] >= 0)
280	{	1238	{
281	p->w->pending = 0;	1239	close (evpipe [0]);
282	p->w->cb (p->w, p->events);	1240	close (evpipe [1]);
283	}	1241	}
284	}	1242	}
285		1243
286	pendingcnt = 0;	1244	#if EV_USE_INOTIFY
287	}	1245	if (fs_fd >= 0)
		1246	close (fs_fd);
		1247	#endif
288		1248
289	static void	1249	if (backend_fd >= 0)
290	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1250	close (backend_fd);
		1251
		1252	#if EV_USE_PORT
		1253	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1254	#endif
		1255	#if EV_USE_KQUEUE
		1256	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1257	#endif
		1258	#if EV_USE_EPOLL
		1259	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1260	#endif
		1261	#if EV_USE_POLL
		1262	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1263	#endif
		1264	#if EV_USE_SELECT
		1265	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1266	#endif
		1267
		1268	for (i = NUMPRI; i--; )
		1269	{
		1270	array_free (pending, [i]);
		1271	#if EV_IDLE_ENABLE
		1272	array_free (idle, [i]);
		1273	#endif
		1274	}
		1275
		1276	ev_free (anfds); anfdmax = 0;
		1277
		1278	/* have to use the microsoft-never-gets-it-right macro */
		1279	array_free (fdchange, EMPTY);
		1280	array_free (timer, EMPTY);
		1281	#if EV_PERIODIC_ENABLE
		1282	array_free (periodic, EMPTY);
		1283	#endif
		1284	#if EV_FORK_ENABLE
		1285	array_free (fork, EMPTY);
		1286	#endif
		1287	array_free (prepare, EMPTY);
		1288	array_free (check, EMPTY);
		1289	#if EV_ASYNC_ENABLE
		1290	array_free (async, EMPTY);
		1291	#endif
		1292
		1293	backend = 0;
		1294	}
		1295
		1296	#if EV_USE_INOTIFY
		1297	void inline_size infy_fork (EV_P);
		1298	#endif
		1299
		1300	void inline_size
		1301	loop_fork (EV_P)
291	{	1302	{
292	while (timercnt && timers [0]->at <= now)	1303	#if EV_USE_PORT
		1304	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1305	#endif
		1306	#if EV_USE_KQUEUE
		1307	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1308	#endif
		1309	#if EV_USE_EPOLL
		1310	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1311	#endif
		1312	#if EV_USE_INOTIFY
		1313	infy_fork (EV_A);
		1314	#endif
		1315
		1316	if (ev_is_active (&pipeev))
		1317	{
		1318	/* this "locks" the handlers against writing to the pipe */
		1319	/* while we modify the fd vars */
		1320	gotsig = 1;
		1321	#if EV_ASYNC_ENABLE
		1322	gotasync = 1;
		1323	#endif
		1324
		1325	ev_ref (EV_A);
		1326	ev_io_stop (EV_A_ &pipeev);
		1327
		1328	#if EV_USE_EVENTFD
		1329	if (evfd >= 0)
		1330	close (evfd);
		1331	#endif
		1332
		1333	if (evpipe [0] >= 0)
		1334	{
		1335	close (evpipe [0]);
		1336	close (evpipe [1]);
		1337	}
		1338
		1339	evpipe_init (EV_A);
		1340	/* now iterate over everything, in case we missed something */
		1341	pipecb (EV_A_ &pipeev, EV_READ);
		1342	}
		1343
		1344	postfork = 0;
		1345	}
		1346
		1347	#if EV_MULTIPLICITY
		1348	struct ev_loop *
		1349	ev_loop_new (unsigned int flags)
		1350	{
		1351	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		1352
		1353	memset (loop, 0, sizeof (struct ev_loop));
		1354
		1355	loop_init (EV_A_ flags);
		1356
		1357	if (ev_backend (EV_A))
		1358	return loop;
		1359
		1360	return 0;
		1361	}
		1362
		1363	void
		1364	ev_loop_destroy (EV_P)
		1365	{
		1366	loop_destroy (EV_A);
		1367	ev_free (loop);
		1368	}
		1369
		1370	void
		1371	ev_loop_fork (EV_P)
		1372	{
		1373	postfork = 1; /* must be in line with ev_default_fork */
		1374	}
		1375
		1376	#endif
		1377
		1378	#if EV_MULTIPLICITY
		1379	struct ev_loop *
		1380	ev_default_loop_init (unsigned int flags)
		1381	#else
		1382	int
		1383	ev_default_loop (unsigned int flags)
		1384	#endif
		1385	{
		1386	if (!ev_default_loop_ptr)
		1387	{
		1388	#if EV_MULTIPLICITY
		1389	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1390	#else
		1391	ev_default_loop_ptr = 1;
		1392	#endif
		1393
		1394	loop_init (EV_A_ flags);
		1395
		1396	if (ev_backend (EV_A))
		1397	{
		1398	#ifndef _WIN32
		1399	ev_signal_init (&childev, childcb, SIGCHLD);
		1400	ev_set_priority (&childev, EV_MAXPRI);
		1401	ev_signal_start (EV_A_ &childev);
		1402	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1403	#endif
		1404	}
		1405	else
		1406	ev_default_loop_ptr = 0;
		1407	}
		1408
		1409	return ev_default_loop_ptr;
		1410	}
		1411
		1412	void
		1413	ev_default_destroy (void)
		1414	{
		1415	#if EV_MULTIPLICITY
		1416	struct ev_loop *loop = ev_default_loop_ptr;
		1417	#endif
		1418
		1419	#ifndef _WIN32
		1420	ev_ref (EV_A); /* child watcher */
		1421	ev_signal_stop (EV_A_ &childev);
		1422	#endif
		1423
		1424	loop_destroy (EV_A);
		1425	}
		1426
		1427	void
		1428	ev_default_fork (void)
		1429	{
		1430	#if EV_MULTIPLICITY
		1431	struct ev_loop *loop = ev_default_loop_ptr;
		1432	#endif
		1433
		1434	if (backend)
		1435	postfork = 1; /* must be in line with ev_loop_fork */
		1436	}
		1437
		1438	/*****************************************************************************/
		1439
		1440	void
		1441	ev_invoke (EV_P_ void *w, int revents)
		1442	{
		1443	EV_CB_INVOKE ((W)w, revents);
		1444	}
		1445
		1446	void inline_speed
		1447	call_pending (EV_P)
		1448	{
		1449	int pri;
		1450
		1451	for (pri = NUMPRI; pri--; )
		1452	while (pendingcnt [pri])
293	{	1453	{
294	struct ev_timer *w = timers [0];	1454	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1455
		1456	if (expect_true (p->w))
		1457	{
		1458	/assert (("non-pending watcher on pending list", p->w->pending));/
		1459
		1460	p->w->pending = 0;
		1461	EV_CB_INVOKE (p->w, p->events);
		1462	}
		1463	}
		1464	}
		1465
		1466	void inline_size
		1467	timers_reify (EV_P)
		1468	{
		1469	while (timercnt && ev_at (timers [1]) <= mn_now)
		1470	{
		1471	ev_timer w = (ev_timer )timers [1];
		1472
		1473	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
295		1474
296	/* first reschedule or stop timer */	1475	/* first reschedule or stop timer */
297	if (w->repeat)	1476	if (w->repeat)
298	{	1477	{
299	if (w->is_abs)	1478	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
300	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
301	else
302	w->at = now + w->repeat;
303		1479
304	assert (w->at > now);	1480	ev_at (w) += w->repeat;
		1481	if (ev_at (w) < mn_now)
		1482	ev_at (w) = mn_now;
305		1483
306	downheap (timers, timercnt, 0);	1484	downheap (timers, timercnt, 1);
307	}	1485	}
308	else	1486	else
		1487	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1488
		1489	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1490	}
		1491	}
		1492
		1493	#if EV_PERIODIC_ENABLE
		1494	void inline_size
		1495	periodics_reify (EV_P)
		1496	{
		1497	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
		1498	{
		1499	ev_periodic w = (ev_periodic )periodics [1];
		1500
		1501	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
		1502
		1503	/* first reschedule or stop timer */
		1504	if (w->reschedule_cb)
309	{	1505	{
310	evtimer_stop (w); /* nonrepeating: stop timer */	1506	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
311	--timercnt; /* maybe pass by reference instead? */	1507	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1508	downheap (periodics, periodiccnt, 1);
312	}	1509	}
		1510	else if (w->interval)
		1511	{
		1512	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1513	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1514	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1515	downheap (periodics, periodiccnt, 1);
		1516	}
		1517	else
		1518	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
313		1519
314	event ((struct ev_watcher *)w, EV_TIMEOUT);	1520	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
315	}	1521	}
316	}	1522	}
317		1523
318	static void	1524	static void noinline
319	time_update ()	1525	periodics_reschedule (EV_P)
320	{	1526	{
321	int i;	1527	int i;
322	ev_now = ev_time ();
323		1528
324	if (have_monotonic)	1529	/* adjust periodics after time jump */
		1530	for (i = 1; i <= periodiccnt; ++i)
		1531	{
		1532	ev_periodic w = (ev_periodic )periodics [i];
		1533
		1534	if (w->reschedule_cb)
		1535	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1536	else if (w->interval)
		1537	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
325	{	1538	}
326	ev_tstamp odiff = diff;
327		1539
328	/* detecting time jumps is much more difficult */	1540	/* now rebuild the heap */
329	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1541	for (i = periodiccnt >> 1; i--; )
		1542	downheap (periodics, periodiccnt, i);
		1543	}
		1544	#endif
		1545
		1546	#if EV_IDLE_ENABLE
		1547	void inline_size
		1548	idle_reify (EV_P)
		1549	{
		1550	if (expect_false (idleall))
		1551	{
		1552	int pri;
		1553
		1554	for (pri = NUMPRI; pri--; )
330	{	1555	{
		1556	if (pendingcnt [pri])
		1557	break;
		1558
		1559	if (idlecnt [pri])
		1560	{
		1561	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1562	break;
		1563	}
		1564	}
		1565	}
		1566	}
		1567	#endif
		1568
		1569	void inline_speed
		1570	time_update (EV_P_ ev_tstamp max_block)
		1571	{
		1572	int i;
		1573
		1574	#if EV_USE_MONOTONIC
		1575	if (expect_true (have_monotonic))
		1576	{
		1577	ev_tstamp odiff = rtmn_diff;
		1578
331	now = get_clock ();	1579	mn_now = get_clock ();
		1580
		1581	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		1582	/* interpolate in the meantime */
		1583	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1584	{
		1585	ev_rt_now = rtmn_diff + mn_now;
		1586	return;
		1587	}
		1588
		1589	now_floor = mn_now;
		1590	ev_rt_now = ev_time ();
		1591
		1592	/* loop a few times, before making important decisions.
		1593	* on the choice of "4": one iteration isn't enough,
		1594	* in case we get preempted during the calls to
		1595	* ev_time and get_clock. a second call is almost guaranteed
		1596	* to succeed in that case, though. and looping a few more times
		1597	* doesn't hurt either as we only do this on time-jumps or
		1598	* in the unlikely event of having been preempted here.
		1599	*/
		1600	for (i = 4; --i; )
		1601	{
332	diff = ev_now - now;	1602	rtmn_diff = ev_rt_now - mn_now;
333		1603
334	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1604	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
335	return; /* all is well */	1605	return; /* all is well */
336		1606
337	ev_now = ev_time ();	1607	ev_rt_now = ev_time ();
		1608	mn_now = get_clock ();
		1609	now_floor = mn_now;
338	}	1610	}
339		1611
340	/* time jump detected, reschedule atimers */	1612	# if EV_PERIODIC_ENABLE
341	for (i = 0; i < atimercnt; ++i)	1613	periodics_reschedule (EV_A);
		1614	# endif
		1615	/* no timer adjustment, as the monotonic clock doesn't jump */
		1616	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1617	}
		1618	else
		1619	#endif
		1620	{
		1621	ev_rt_now = ev_time ();
		1622
		1623	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
342	{	1624	{
343	struct ev_timer *w = atimers [i];	1625	#if EV_PERIODIC_ENABLE
344	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1626	periodics_reschedule (EV_A);
		1627	#endif
		1628	/* adjust timers. this is easy, as the offset is the same for all of them */
		1629	for (i = 1; i <= timercnt; ++i)
		1630	ev_at (timers [i]) += ev_rt_now - mn_now;
345	}	1631	}
346	}
347	else
348	{
349	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
350	/* time jump detected, adjust rtimers */
351	for (i = 0; i < rtimercnt; ++i)
352	rtimers [i]->at += ev_now - now;
353		1632
354	now = ev_now;	1633	mn_now = ev_rt_now;
355	}	1634	}
356	}	1635	}
357		1636
358	int ev_loop_done;	1637	void
		1638	ev_ref (EV_P)
		1639	{
		1640	++activecnt;
		1641	}
359		1642
		1643	void
		1644	ev_unref (EV_P)
		1645	{
		1646	--activecnt;
		1647	}
		1648
		1649	static int loop_done;
		1650
		1651	void
360	void ev_loop (int flags)	1652	ev_loop (EV_P_ int flags)
361	{	1653	{
362	double block;	1654	loop_done = EVUNLOOP_CANCEL;
363	ev_loop_done = flags & EVLOOP_ONESHOT;	1655
		1656	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
364		1657
365	do	1658	do
366	{	1659	{
		1660	#ifndef _WIN32
		1661	if (expect_false (curpid)) /* penalise the forking check even more */
		1662	if (expect_false (getpid () != curpid))
		1663	{
		1664	curpid = getpid ();
		1665	postfork = 1;
		1666	}
		1667	#endif
		1668
		1669	#if EV_FORK_ENABLE
		1670	/* we might have forked, so queue fork handlers */
		1671	if (expect_false (postfork))
		1672	if (forkcnt)
		1673	{
		1674	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1675	call_pending (EV_A);
		1676	}
		1677	#endif
		1678
		1679	/* queue prepare watchers (and execute them) */
		1680	if (expect_false (preparecnt))
		1681	{
		1682	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1683	call_pending (EV_A);
		1684	}
		1685
		1686	if (expect_false (!activecnt))
		1687	break;
		1688
		1689	/* we might have forked, so reify kernel state if necessary */
		1690	if (expect_false (postfork))
		1691	loop_fork (EV_A);
		1692
367	/* update fd-related kernel structures */	1693	/* update fd-related kernel structures */
368	fd_reify ();	1694	fd_reify (EV_A);
369		1695
370	/* calculate blocking time */	1696	/* calculate blocking time */
371	if (flags & EVLOOP_NONBLOCK)	1697	{
372	block = 0.;	1698	ev_tstamp waittime = 0.;
373	else	1699	ev_tstamp sleeptime = 0.;
		1700
		1701	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
374	{	1702	{
		1703	/* update time to cancel out callback processing overhead */
		1704	time_update (EV_A_ 1e100);
		1705
375	block = MAX_BLOCKTIME;	1706	waittime = MAX_BLOCKTIME;
376		1707
377	if (rtimercnt)	1708	if (timercnt)
378	{	1709	{
379	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1710	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
380	if (block > to) block = to;	1711	if (waittime > to) waittime = to;
381	}	1712	}
382		1713
		1714	#if EV_PERIODIC_ENABLE
383	if (atimercnt)	1715	if (periodiccnt)
384	{	1716	{
385	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1717	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
386	if (block > to) block = to;	1718	if (waittime > to) waittime = to;
387	}	1719	}
		1720	#endif
388		1721
389	if (block < 0.) block = 0.;	1722	if (expect_false (waittime < timeout_blocktime))
		1723	waittime = timeout_blocktime;
		1724
		1725	sleeptime = waittime - backend_fudge;
		1726
		1727	if (expect_true (sleeptime > io_blocktime))
		1728	sleeptime = io_blocktime;
		1729
		1730	if (sleeptime)
		1731	{
		1732	ev_sleep (sleeptime);
		1733	waittime -= sleeptime;
		1734	}
390	}	1735	}
391		1736
392	method_poll (block);	1737	++loop_count;
		1738	backend_poll (EV_A_ waittime);
393		1739
394	/* update ev_now, do magic */	1740	/* update ev_rt_now, do magic */
395	time_update ();	1741	time_update (EV_A_ waittime + sleeptime);
		1742	}
396		1743
397	/* put pending timers into pendign queue and reschedule them */	1744	/* queue pending timers and reschedule them */
398	/* absolute timers first */	1745	timers_reify (EV_A); /* relative timers called last */
399	timers_reify (atimers, atimercnt, ev_now);	1746	#if EV_PERIODIC_ENABLE
400	/* relative timers second */	1747	periodics_reify (EV_A); /* absolute timers called first */
401	timers_reify (rtimers, rtimercnt, now);	1748	#endif
402		1749
		1750	#if EV_IDLE_ENABLE
		1751	/* queue idle watchers unless other events are pending */
		1752	idle_reify (EV_A);
		1753	#endif
		1754
		1755	/* queue check watchers, to be executed first */
		1756	if (expect_false (checkcnt))
		1757	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1758
403	call_pending ();	1759	call_pending (EV_A);
404	}	1760	}
405	while (!ev_loop_done);	1761	while (expect_true (
406	}	1762	activecnt
		1763	&& !loop_done
		1764	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
		1765	));
407		1766
408	static void	1767	if (loop_done == EVUNLOOP_ONE)
409	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	1768	loop_done = EVUNLOOP_CANCEL;
		1769	}
		1770
		1771	void
		1772	ev_unloop (EV_P_ int how)
		1773	{
		1774	loop_done = how;
		1775	}
		1776
		1777	/*****************************************************************************/
		1778
		1779	void inline_size
		1780	wlist_add (WL *head, WL elem)
410	{	1781	{
411	elem->next = *head;	1782	elem->next = *head;
412	*head = elem;	1783	*head = elem;
413	}	1784	}
414		1785
415	static void	1786	void inline_size
416	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	1787	wlist_del (WL *head, WL elem)
417	{	1788	{
418	while (*head)	1789	while (*head)
419	{	1790	{
420	if (*head == elem)	1791	if (*head == elem)
421	{	1792	{
425		1796
426	head = &(*head)->next;	1797	head = &(*head)->next;
427	}	1798	}
428	}	1799	}
429		1800
		1801	void inline_speed
		1802	clear_pending (EV_P_ W w)
		1803	{
		1804	if (w->pending)
		1805	{
		1806	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1807	w->pending = 0;
		1808	}
		1809	}
		1810
		1811	int
		1812	ev_clear_pending (EV_P_ void *w)
		1813	{
		1814	W w_ = (W)w;
		1815	int pending = w_->pending;
		1816
		1817	if (expect_true (pending))
		1818	{
		1819	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1820	w_->pending = 0;
		1821	p->w = 0;
		1822	return p->events;
		1823	}
		1824	else
		1825	return 0;
		1826	}
		1827
		1828	void inline_size
		1829	pri_adjust (EV_P_ W w)
		1830	{
		1831	int pri = w->priority;
		1832	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1833	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1834	w->priority = pri;
		1835	}
		1836
		1837	void inline_speed
		1838	ev_start (EV_P_ W w, int active)
		1839	{
		1840	pri_adjust (EV_A_ w);
		1841	w->active = active;
		1842	ev_ref (EV_A);
		1843	}
		1844
		1845	void inline_size
		1846	ev_stop (EV_P_ W w)
		1847	{
		1848	ev_unref (EV_A);
		1849	w->active = 0;
		1850	}
		1851
		1852	/*****************************************************************************/
		1853
		1854	void noinline
		1855	ev_io_start (EV_P_ ev_io *w)
		1856	{
		1857	int fd = w->fd;
		1858
		1859	if (expect_false (ev_is_active (w)))
		1860	return;
		1861
		1862	assert (("ev_io_start called with negative fd", fd >= 0));
		1863
		1864	ev_start (EV_A_ (W)w, 1);
		1865	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1866	wlist_add (&anfds[fd].head, (WL)w);
		1867
		1868	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
		1869	w->events &= ~EV_IOFDSET;
		1870	}
		1871
		1872	void noinline
		1873	ev_io_stop (EV_P_ ev_io *w)
		1874	{
		1875	clear_pending (EV_A_ (W)w);
		1876	if (expect_false (!ev_is_active (w)))
		1877	return;
		1878
		1879	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1880
		1881	wlist_del (&anfds[w->fd].head, (WL)w);
		1882	ev_stop (EV_A_ (W)w);
		1883
		1884	fd_change (EV_A_ w->fd, 1);
		1885	}
		1886
		1887	void noinline
		1888	ev_timer_start (EV_P_ ev_timer *w)
		1889	{
		1890	if (expect_false (ev_is_active (w)))
		1891	return;
		1892
		1893	ev_at (w) += mn_now;
		1894
		1895	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1896
		1897	ev_start (EV_A_ (W)w, ++timercnt);
		1898	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
		1899	timers [timercnt] = (WT)w;
		1900	upheap (timers, timercnt);
		1901
		1902	/assert (("internal timer heap corruption", timers [ev_active (w)] == w));/
		1903	}
		1904
		1905	void noinline
		1906	ev_timer_stop (EV_P_ ev_timer *w)
		1907	{
		1908	clear_pending (EV_A_ (W)w);
		1909	if (expect_false (!ev_is_active (w)))
		1910	return;
		1911
		1912	{
		1913	int active = ev_active (w);
		1914
		1915	assert (("internal timer heap corruption", timers [active] == (WT)w));
		1916
		1917	if (expect_true (active < timercnt))
		1918	{
		1919	timers [active] = timers [timercnt];
		1920	adjustheap (timers, timercnt, active);
		1921	}
		1922
		1923	--timercnt;
		1924	}
		1925
		1926	ev_at (w) -= mn_now;
		1927
		1928	ev_stop (EV_A_ (W)w);
		1929	}
		1930
		1931	void noinline
		1932	ev_timer_again (EV_P_ ev_timer *w)
		1933	{
		1934	if (ev_is_active (w))
		1935	{
		1936	if (w->repeat)
		1937	{
		1938	ev_at (w) = mn_now + w->repeat;
		1939	adjustheap (timers, timercnt, ev_active (w));
		1940	}
		1941	else
		1942	ev_timer_stop (EV_A_ w);
		1943	}
		1944	else if (w->repeat)
		1945	{
		1946	ev_at (w) = w->repeat;
		1947	ev_timer_start (EV_A_ w);
		1948	}
		1949	}
		1950
		1951	#if EV_PERIODIC_ENABLE
		1952	void noinline
		1953	ev_periodic_start (EV_P_ ev_periodic *w)
		1954	{
		1955	if (expect_false (ev_is_active (w)))
		1956	return;
		1957
		1958	if (w->reschedule_cb)
		1959	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1960	else if (w->interval)
		1961	{
		1962	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1963	/* this formula differs from the one in periodic_reify because we do not always round up */
		1964	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1965	}
		1966	else
		1967	ev_at (w) = w->offset;
		1968
		1969	ev_start (EV_A_ (W)w, ++periodiccnt);
		1970	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
		1971	periodics [periodiccnt] = (WT)w;
		1972	upheap (periodics, periodiccnt);
		1973
		1974	/assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));/
		1975	}
		1976
		1977	void noinline
		1978	ev_periodic_stop (EV_P_ ev_periodic *w)
		1979	{
		1980	clear_pending (EV_A_ (W)w);
		1981	if (expect_false (!ev_is_active (w)))
		1982	return;
		1983
		1984	{
		1985	int active = ev_active (w);
		1986
		1987	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		1988
		1989	if (expect_true (active < periodiccnt))
		1990	{
		1991	periodics [active] = periodics [periodiccnt];
		1992	adjustheap (periodics, periodiccnt, active);
		1993	}
		1994
		1995	--periodiccnt;
		1996	}
		1997
		1998	ev_stop (EV_A_ (W)w);
		1999	}
		2000
		2001	void noinline
		2002	ev_periodic_again (EV_P_ ev_periodic *w)
		2003	{
		2004	/* TODO: use adjustheap and recalculation */
		2005	ev_periodic_stop (EV_A_ w);
		2006	ev_periodic_start (EV_A_ w);
		2007	}
		2008	#endif
		2009
		2010	#ifndef SA_RESTART
		2011	# define SA_RESTART 0
		2012	#endif
		2013
		2014	void noinline
		2015	ev_signal_start (EV_P_ ev_signal *w)
		2016	{
		2017	#if EV_MULTIPLICITY
		2018	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2019	#endif
		2020	if (expect_false (ev_is_active (w)))
		2021	return;
		2022
		2023	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2024
		2025	evpipe_init (EV_A);
		2026
		2027	{
		2028	#ifndef _WIN32
		2029	sigset_t full, prev;
		2030	sigfillset (&full);
		2031	sigprocmask (SIG_SETMASK, &full, &prev);
		2032	#endif
		2033
		2034	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2035
		2036	#ifndef _WIN32
		2037	sigprocmask (SIG_SETMASK, &prev, 0);
		2038	#endif
		2039	}
		2040
		2041	ev_start (EV_A_ (W)w, 1);
		2042	wlist_add (&signals [w->signum - 1].head, (WL)w);
		2043
		2044	if (!((WL)w)->next)
		2045	{
		2046	#if _WIN32
		2047	signal (w->signum, ev_sighandler);
		2048	#else
		2049	struct sigaction sa;
		2050	sa.sa_handler = ev_sighandler;
		2051	sigfillset (&sa.sa_mask);
		2052	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		2053	sigaction (w->signum, &sa, 0);
		2054	#endif
		2055	}
		2056	}
		2057
		2058	void noinline
		2059	ev_signal_stop (EV_P_ ev_signal *w)
		2060	{
		2061	clear_pending (EV_A_ (W)w);
		2062	if (expect_false (!ev_is_active (w)))
		2063	return;
		2064
		2065	wlist_del (&signals [w->signum - 1].head, (WL)w);
		2066	ev_stop (EV_A_ (W)w);
		2067
		2068	if (!signals [w->signum - 1].head)
		2069	signal (w->signum, SIG_DFL);
		2070	}
		2071
		2072	void
		2073	ev_child_start (EV_P_ ev_child *w)
		2074	{
		2075	#if EV_MULTIPLICITY
		2076	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2077	#endif
		2078	if (expect_false (ev_is_active (w)))
		2079	return;
		2080
		2081	ev_start (EV_A_ (W)w, 1);
		2082	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2083	}
		2084
		2085	void
		2086	ev_child_stop (EV_P_ ev_child *w)
		2087	{
		2088	clear_pending (EV_A_ (W)w);
		2089	if (expect_false (!ev_is_active (w)))
		2090	return;
		2091
		2092	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2093	ev_stop (EV_A_ (W)w);
		2094	}
		2095
		2096	#if EV_STAT_ENABLE
		2097
		2098	# ifdef _WIN32
		2099	# undef lstat
		2100	# define lstat(a,b) _stati64 (a,b)
		2101	# endif
		2102
		2103	#define DEF_STAT_INTERVAL 5.0074891
		2104	#define MIN_STAT_INTERVAL 0.1074891
		2105
		2106	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2107
		2108	#if EV_USE_INOTIFY
		2109	# define EV_INOTIFY_BUFSIZE 8192
		2110
		2111	static void noinline
		2112	infy_add (EV_P_ ev_stat *w)
		2113	{
		2114	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);
		2115
		2116	if (w->wd < 0)
		2117	{
		2118	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2119
		2120	/* monitor some parent directory for speedup hints */
		2121	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2122	/* but an efficiency issue only */
		2123	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
		2124	{
		2125	char path [4096];
		2126	strcpy (path, w->path);
		2127
		2128	do
		2129	{
		2130	int mask = IN_MASK_ADD \| IN_DELETE_SELF \| IN_MOVE_SELF
		2131	\| (errno == EACCES ? IN_ATTRIB : IN_CREATE \| IN_MOVED_TO);
		2132
		2133	char *pend = strrchr (path, '/');
		2134
		2135	if (!pend)
		2136	break; /* whoops, no '/', complain to your admin */
		2137
		2138	*pend = 0;
		2139	w->wd = inotify_add_watch (fs_fd, path, mask);
		2140	}
		2141	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
		2142	}
		2143	}
		2144	else
		2145	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2146
		2147	if (w->wd >= 0)
		2148	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2149	}
		2150
		2151	static void noinline
		2152	infy_del (EV_P_ ev_stat *w)
		2153	{
		2154	int slot;
		2155	int wd = w->wd;
		2156
		2157	if (wd < 0)
		2158	return;
		2159
		2160	w->wd = -2;
		2161	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2162	wlist_del (&fs_hash [slot].head, (WL)w);
		2163
		2164	/* remove this watcher, if others are watching it, they will rearm */
		2165	inotify_rm_watch (fs_fd, wd);
		2166	}
		2167
		2168	static void noinline
		2169	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2170	{
		2171	if (slot < 0)
		2172	/* overflow, need to check for all hahs slots */
		2173	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2174	infy_wd (EV_A_ slot, wd, ev);
		2175	else
		2176	{
		2177	WL w_;
		2178
		2179	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2180	{
		2181	ev_stat w = (ev_stat )w_;
		2182	w_ = w_->next; /* lets us remove this watcher and all before it */
		2183
		2184	if (w->wd == wd \|\| wd == -1)
		2185	{
		2186	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))
		2187	{
		2188	w->wd = -1;
		2189	infy_add (EV_A_ w); /* re-add, no matter what */
		2190	}
		2191
		2192	stat_timer_cb (EV_A_ &w->timer, 0);
		2193	}
		2194	}
		2195	}
		2196	}
		2197
430	static void	2198	static void
431	ev_start (struct ev_watcher *w, int active)	2199	infy_cb (EV_P_ ev_io *w, int revents)
432	{	2200	{
433	w->pending = 0;	2201	char buf [EV_INOTIFY_BUFSIZE];
434	w->active = active;	2202	struct inotify_event ev = (struct inotify_event )buf;
		2203	int ofs;
		2204	int len = read (fs_fd, buf, sizeof (buf));
		2205
		2206	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2207	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2208	}
		2209
		2210	void inline_size
		2211	infy_init (EV_P)
		2212	{
		2213	if (fs_fd != -2)
		2214	return;
		2215
		2216	fs_fd = inotify_init ();
		2217
		2218	if (fs_fd >= 0)
		2219	{
		2220	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2221	ev_set_priority (&fs_w, EV_MAXPRI);
		2222	ev_io_start (EV_A_ &fs_w);
		2223	}
		2224	}
		2225
		2226	void inline_size
		2227	infy_fork (EV_P)
		2228	{
		2229	int slot;
		2230
		2231	if (fs_fd < 0)
		2232	return;
		2233
		2234	close (fs_fd);
		2235	fs_fd = inotify_init ();
		2236
		2237	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2238	{
		2239	WL w_ = fs_hash [slot].head;
		2240	fs_hash [slot].head = 0;
		2241
		2242	while (w_)
		2243	{
		2244	ev_stat w = (ev_stat )w_;
		2245	w_ = w_->next; /* lets us add this watcher */
		2246
		2247	w->wd = -1;
		2248
		2249	if (fs_fd >= 0)
		2250	infy_add (EV_A_ w); /* re-add, no matter what */
		2251	else
		2252	ev_timer_start (EV_A_ &w->timer);
		2253	}
		2254
		2255	}
		2256	}
		2257
		2258	#endif
		2259
		2260	void
		2261	ev_stat_stat (EV_P_ ev_stat *w)
		2262	{
		2263	if (lstat (w->path, &w->attr) < 0)
		2264	w->attr.st_nlink = 0;
		2265	else if (!w->attr.st_nlink)
		2266	w->attr.st_nlink = 1;
		2267	}
		2268
		2269	static void noinline
		2270	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2271	{
		2272	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
		2273
		2274	/* we copy this here each the time so that */
		2275	/* prev has the old value when the callback gets invoked */
		2276	w->prev = w->attr;
		2277	ev_stat_stat (EV_A_ w);
		2278
		2279	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2280	if (
		2281	w->prev.st_dev != w->attr.st_dev
		2282	\|\| w->prev.st_ino != w->attr.st_ino
		2283	\|\| w->prev.st_mode != w->attr.st_mode
		2284	\|\| w->prev.st_nlink != w->attr.st_nlink
		2285	\|\| w->prev.st_uid != w->attr.st_uid
		2286	\|\| w->prev.st_gid != w->attr.st_gid
		2287	\|\| w->prev.st_rdev != w->attr.st_rdev
		2288	\|\| w->prev.st_size != w->attr.st_size
		2289	\|\| w->prev.st_atime != w->attr.st_atime
		2290	\|\| w->prev.st_mtime != w->attr.st_mtime
		2291	\|\| w->prev.st_ctime != w->attr.st_ctime
		2292	) {
		2293	#if EV_USE_INOTIFY
		2294	infy_del (EV_A_ w);
		2295	infy_add (EV_A_ w);
		2296	ev_stat_stat (EV_A_ w); /* avoid race... */
		2297	#endif
		2298
		2299	ev_feed_event (EV_A_ w, EV_STAT);
		2300	}
		2301	}
		2302
		2303	void
		2304	ev_stat_start (EV_P_ ev_stat *w)
		2305	{
		2306	if (expect_false (ev_is_active (w)))
		2307	return;
		2308
		2309	/* since we use memcmp, we need to clear any padding data etc. */
		2310	memset (&w->prev, 0, sizeof (ev_statdata));
		2311	memset (&w->attr, 0, sizeof (ev_statdata));
		2312
		2313	ev_stat_stat (EV_A_ w);
		2314
		2315	if (w->interval < MIN_STAT_INTERVAL)
		2316	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2317
		2318	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2319	ev_set_priority (&w->timer, ev_priority (w));
		2320
		2321	#if EV_USE_INOTIFY
		2322	infy_init (EV_A);
		2323
		2324	if (fs_fd >= 0)
		2325	infy_add (EV_A_ w);
		2326	else
		2327	#endif
		2328	ev_timer_start (EV_A_ &w->timer);
		2329
		2330	ev_start (EV_A_ (W)w, 1);
		2331	}
		2332
		2333	void
		2334	ev_stat_stop (EV_P_ ev_stat *w)
		2335	{
		2336	clear_pending (EV_A_ (W)w);
		2337	if (expect_false (!ev_is_active (w)))
		2338	return;
		2339
		2340	#if EV_USE_INOTIFY
		2341	infy_del (EV_A_ w);
		2342	#endif
		2343	ev_timer_stop (EV_A_ &w->timer);
		2344
		2345	ev_stop (EV_A_ (W)w);
		2346	}
		2347	#endif
		2348
		2349	#if EV_IDLE_ENABLE
		2350	void
		2351	ev_idle_start (EV_P_ ev_idle *w)
		2352	{
		2353	if (expect_false (ev_is_active (w)))
		2354	return;
		2355
		2356	pri_adjust (EV_A_ (W)w);
		2357
		2358	{
		2359	int active = ++idlecnt [ABSPRI (w)];
		2360
		2361	++idleall;
		2362	ev_start (EV_A_ (W)w, active);
		2363
		2364	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2365	idles [ABSPRI (w)][active - 1] = w;
		2366	}
		2367	}
		2368
		2369	void
		2370	ev_idle_stop (EV_P_ ev_idle *w)
		2371	{
		2372	clear_pending (EV_A_ (W)w);
		2373	if (expect_false (!ev_is_active (w)))
		2374	return;
		2375
		2376	{
		2377	int active = ev_active (w);
		2378
		2379	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2380	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2381
		2382	ev_stop (EV_A_ (W)w);
		2383	--idleall;
		2384	}
		2385	}
		2386	#endif
		2387
		2388	void
		2389	ev_prepare_start (EV_P_ ev_prepare *w)
		2390	{
		2391	if (expect_false (ev_is_active (w)))
		2392	return;
		2393
		2394	ev_start (EV_A_ (W)w, ++preparecnt);
		2395	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2396	prepares [preparecnt - 1] = w;
		2397	}
		2398
		2399	void
		2400	ev_prepare_stop (EV_P_ ev_prepare *w)
		2401	{
		2402	clear_pending (EV_A_ (W)w);
		2403	if (expect_false (!ev_is_active (w)))
		2404	return;
		2405
		2406	{
		2407	int active = ev_active (w);
		2408
		2409	prepares [active - 1] = prepares [--preparecnt];
		2410	ev_active (prepares [active - 1]) = active;
		2411	}
		2412
		2413	ev_stop (EV_A_ (W)w);
		2414	}
		2415
		2416	void
		2417	ev_check_start (EV_P_ ev_check *w)
		2418	{
		2419	if (expect_false (ev_is_active (w)))
		2420	return;
		2421
		2422	ev_start (EV_A_ (W)w, ++checkcnt);
		2423	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2424	checks [checkcnt - 1] = w;
		2425	}
		2426
		2427	void
		2428	ev_check_stop (EV_P_ ev_check *w)
		2429	{
		2430	clear_pending (EV_A_ (W)w);
		2431	if (expect_false (!ev_is_active (w)))
		2432	return;
		2433
		2434	{
		2435	int active = ev_active (w);
		2436
		2437	checks [active - 1] = checks [--checkcnt];
		2438	ev_active (checks [active - 1]) = active;
		2439	}
		2440
		2441	ev_stop (EV_A_ (W)w);
		2442	}
		2443
		2444	#if EV_EMBED_ENABLE
		2445	void noinline
		2446	ev_embed_sweep (EV_P_ ev_embed *w)
		2447	{
		2448	ev_loop (w->other, EVLOOP_NONBLOCK);
435	}	2449	}
436		2450
437	static void	2451	static void
438	ev_stop (struct ev_watcher *w)	2452	embed_io_cb (EV_P_ ev_io *io, int revents)
439	{	2453	{
440	if (w->pending)	2454	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
441	pendings [w->pending - 1].w = 0;
442		2455
443	w->active = 0;
444	/* nop */
445	}
446
447	void
448	evio_start (struct ev_io *w)
449	{
450	if (ev_is_active (w))	2456	if (ev_cb (w))
451	return;	2457	ev_feed_event (EV_A_ (W)w, EV_EMBED);
452
453	int fd = w->fd;
454
455	ev_start ((struct ev_watcher *)w, 1);
456	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
457	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);
458
459	++fdchangecnt;
460	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
461	fdchanges [fdchangecnt - 1] = fd;
462	}
463
464	void
465	evio_stop (struct ev_io *w)
466	{
467	if (!ev_is_active (w))
468	return;
469
470	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);
471	ev_stop ((struct ev_watcher *)w);
472
473	++fdchangecnt;
474	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
475	fdchanges [fdchangecnt - 1] = w->fd;
476	}
477
478	void
479	evtimer_start (struct ev_timer *w)
480	{
481	if (ev_is_active (w))
482	return;
483
484	if (w->is_abs)
485	{
486	/* this formula differs from the one in timer_reify becuse we do not round up */
487	if (w->repeat)
488	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
489
490	ev_start ((struct ev_watcher *)w, ++atimercnt);
491	array_needsize (atimers, atimermax, atimercnt, );
492	atimers [atimercnt - 1] = w;
493	upheap (atimers, atimercnt - 1);
494	}
495	else	2458	else
		2459	ev_loop (w->other, EVLOOP_NONBLOCK);
		2460	}
		2461
		2462	static void
		2463	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2464	{
		2465	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2466
496	{	2467	{
497	w->at += now;	2468	struct ev_loop *loop = w->other;
498		2469
499	ev_start ((struct ev_watcher *)w, ++rtimercnt);	2470	while (fdchangecnt)
500	array_needsize (rtimers, rtimermax, rtimercnt, );
501	rtimers [rtimercnt - 1] = w;
502	upheap (rtimers, rtimercnt - 1);
503	}
504
505	}
506
507	void
508	evtimer_stop (struct ev_timer *w)
509	{
510	if (!ev_is_active (w))
511	return;
512
513	if (w->is_abs)
514	{
515	if (w->active < atimercnt--)
516	{	2471	{
517	atimers [w->active - 1] = atimers [atimercnt];	2472	fd_reify (EV_A);
518	downheap (atimers, atimercnt, w->active - 1);	2473	ev_loop (EV_A_ EVLOOP_NONBLOCK);
519	}	2474	}
520	}	2475	}
521	else
522	{
523	if (w->active < rtimercnt--)
524	{
525	rtimers [w->active - 1] = rtimers [rtimercnt];
526	downheap (rtimers, rtimercnt, w->active - 1);
527	}
528	}
529
530	ev_stop ((struct ev_watcher *)w);
531	}	2476	}
532		2477
533	void	2478	#if 0
534	evsignal_start (struct ev_signal *w)	2479	static void
		2480	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
535	{	2481	{
		2482	ev_idle_stop (EV_A_ idle);
		2483	}
		2484	#endif
		2485
		2486	void
		2487	ev_embed_start (EV_P_ ev_embed *w)
		2488	{
536	if (ev_is_active (w))	2489	if (expect_false (ev_is_active (w)))
537	return;	2490	return;
538		2491
539	ev_start ((struct ev_watcher *)w, 1);	2492	{
540	array_needsize (signals, signalmax, w->signum, signals_init);	2493	struct ev_loop *loop = w->other;
541	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	2494	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
542	}	2495	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2496	}
543		2497
		2498	ev_set_priority (&w->io, ev_priority (w));
		2499	ev_io_start (EV_A_ &w->io);
		2500
		2501	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2502	ev_set_priority (&w->prepare, EV_MINPRI);
		2503	ev_prepare_start (EV_A_ &w->prepare);
		2504
		2505	/ev_idle_init (&w->idle, e,bed_idle_cb);/
		2506
		2507	ev_start (EV_A_ (W)w, 1);
		2508	}
		2509
544	void	2510	void
545	evsignal_stop (struct ev_signal *w)	2511	ev_embed_stop (EV_P_ ev_embed *w)
546	{	2512	{
		2513	clear_pending (EV_A_ (W)w);
547	if (!ev_is_active (w))	2514	if (expect_false (!ev_is_active (w)))
548	return;	2515	return;
549		2516
550	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	2517	ev_io_stop (EV_A_ &w->io);
551	ev_stop ((struct ev_watcher *)w);	2518	ev_prepare_stop (EV_A_ &w->prepare);
		2519
		2520	ev_stop (EV_A_ (W)w);
552	}	2521	}
		2522	#endif
		2523
		2524	#if EV_FORK_ENABLE
		2525	void
		2526	ev_fork_start (EV_P_ ev_fork *w)
		2527	{
		2528	if (expect_false (ev_is_active (w)))
		2529	return;
		2530
		2531	ev_start (EV_A_ (W)w, ++forkcnt);
		2532	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2533	forks [forkcnt - 1] = w;
		2534	}
		2535
		2536	void
		2537	ev_fork_stop (EV_P_ ev_fork *w)
		2538	{
		2539	clear_pending (EV_A_ (W)w);
		2540	if (expect_false (!ev_is_active (w)))
		2541	return;
		2542
		2543	{
		2544	int active = ev_active (w);
		2545
		2546	forks [active - 1] = forks [--forkcnt];
		2547	ev_active (forks [active - 1]) = active;
		2548	}
		2549
		2550	ev_stop (EV_A_ (W)w);
		2551	}
		2552	#endif
		2553
		2554	#if EV_ASYNC_ENABLE
		2555	void
		2556	ev_async_start (EV_P_ ev_async *w)
		2557	{
		2558	if (expect_false (ev_is_active (w)))
		2559	return;
		2560
		2561	evpipe_init (EV_A);
		2562
		2563	ev_start (EV_A_ (W)w, ++asynccnt);
		2564	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2565	asyncs [asynccnt - 1] = w;
		2566	}
		2567
		2568	void
		2569	ev_async_stop (EV_P_ ev_async *w)
		2570	{
		2571	clear_pending (EV_A_ (W)w);
		2572	if (expect_false (!ev_is_active (w)))
		2573	return;
		2574
		2575	{
		2576	int active = ev_active (w);
		2577
		2578	asyncs [active - 1] = asyncs [--asynccnt];
		2579	ev_active (asyncs [active - 1]) = active;
		2580	}
		2581
		2582	ev_stop (EV_A_ (W)w);
		2583	}
		2584
		2585	void
		2586	ev_async_send (EV_P_ ev_async *w)
		2587	{
		2588	w->sent = 1;
		2589	evpipe_write (EV_A_ &gotasync);
		2590	}
		2591	#endif
553		2592
554	/*****************************************************************************/	2593	/*****************************************************************************/
555	#if 1	2594
		2595	struct ev_once
		2596	{
		2597	ev_io io;
		2598	ev_timer to;
		2599	void (cb)(int revents, void arg);
		2600	void *arg;
		2601	};
556		2602
557	static void	2603	static void
558	sin_cb (struct ev_io *w, int revents)	2604	once_cb (EV_P_ struct ev_once *once, int revents)
559	{	2605	{
560	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2606	void (cb)(int revents, void arg) = once->cb;
		2607	void *arg = once->arg;
		2608
		2609	ev_io_stop (EV_A_ &once->io);
		2610	ev_timer_stop (EV_A_ &once->to);
		2611	ev_free (once);
		2612
		2613	cb (revents, arg);
561	}	2614	}
562		2615
563	static void	2616	static void
		2617	once_cb_io (EV_P_ ev_io *w, int revents)
		2618	{
		2619	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		2620	}
		2621
		2622	static void
564	ocb (struct ev_timer *w, int revents)	2623	once_cb_to (EV_P_ ev_timer *w, int revents)
565	{	2624	{
566	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2625	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
567	evtimer_stop (w);
568	evtimer_start (w);
569	}	2626	}
570		2627
571	int main (void)	2628	void
		2629	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
572	{	2630	{
573	struct ev_io sin;	2631	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
574		2632
575	ev_init (0);	2633	if (expect_false (!once))
576
577	evw_init (&sin, sin_cb, 55);
578	evio_set (&sin, 0, EV_READ);
579	evio_start (&sin);
580
581	struct ev_timer t[10000];
582
583	#if 1
584	int i;
585	for (i = 0; i < 10000; ++i)
586	{
587	struct ev_timer *w = t + i;
588	evw_init (w, ocb, i);
589	evtimer_set_abs (w, drand48 (), 0.99775533);
590	evtimer_start (w);
591	if (drand48 () < 0.5)
592	evtimer_stop (w);
593	}	2634	{
594	#endif	2635	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
595
596	struct ev_timer t1;
597	evw_init (&t1, ocb, 0);
598	evtimer_set_abs (&t1, 5, 10);
599	evtimer_start (&t1);
600
601	ev_loop (0);
602
603	return 0;	2636	return;
604	}	2637	}
605		2638
606	#endif	2639	once->cb = cb;
		2640	once->arg = arg;
607		2641
		2642	ev_init (&once->io, once_cb_io);
		2643	if (fd >= 0)
		2644	{
		2645	ev_io_set (&once->io, fd, events);
		2646	ev_io_start (EV_A_ &once->io);
		2647	}
608		2648
		2649	ev_init (&once->to, once_cb_to);
		2650	if (timeout >= 0.)
		2651	{
		2652	ev_timer_set (&once->to, timeout, 0.);
		2653	ev_timer_start (EV_A_ &once->to);
		2654	}
		2655	}
609		2656
		2657	#if EV_MULTIPLICITY
		2658	#include "ev_wrap.h"
		2659	#endif
610		2660
		2661	#ifdef __cplusplus
		2662	}
		2663	#endif
		2664

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Comparing libev/ev.c (file contents): Revision 1.6 by root, Tue Oct 30 23:55:29 2007 UTC vs. Revision 1.233 by root, Tue May 6 23:34:16 2008 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.6 by root, Tue Oct 30 23:55:29 2007 UTC vs.
Revision 1.233 by root, Tue May 6 23:34:16 2008 UTC