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Comparing libev/ev.c (file contents):
Revision 1.2 by root, Tue Oct 30 21:42:12 2007 UTC vs.
Revision 1.184 by root, Wed Dec 12 05:30:52 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_INOTIFY
		100	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		101	# define EV_USE_INOTIFY 1
		102	# else
		103	# define EV_USE_INOTIFY 0
		104	# endif
		105	# endif
		106
		107	#endif
		108
1	#include <math.h>	109	#include <math.h>
2	#include <stdlib.h>	110	#include <stdlib.h>
		111	#include <fcntl.h>
		112	#include <stddef.h>
3		113
4	#include <stdio.h>	114	#include <stdio.h>
5		115
		116	#include <assert.h>
6	#include <errno.h>	117	#include <errno.h>
7	#include <sys/time.h>	118	#include <sys/types.h>
8	#include <time.h>	119	#include <time.h>
9		120
		121	#include <signal.h>
		122
		123	#ifdef EV_H
		124	# include EV_H
		125	#else
		126	# include "ev.h"
		127	#endif
		128
		129	#ifndef _WIN32
		130	# include <sys/time.h>
		131	# include <sys/wait.h>
		132	# include <unistd.h>
		133	#else
		134	# define WIN32_LEAN_AND_MEAN
		135	# include <windows.h>
		136	# ifndef EV_SELECT_IS_WINSOCKET
		137	# define EV_SELECT_IS_WINSOCKET 1
		138	# endif
		139	#endif
		140
		141	/**/
		142
		143	#ifndef EV_USE_MONOTONIC
		144	# define EV_USE_MONOTONIC 0
		145	#endif
		146
		147	#ifndef EV_USE_REALTIME
		148	# define EV_USE_REALTIME 0
		149	#endif
		150
		151	#ifndef EV_USE_SELECT
		152	# define EV_USE_SELECT 1
		153	#endif
		154
		155	#ifndef EV_USE_POLL
		156	# ifdef _WIN32
		157	# define EV_USE_POLL 0
		158	# else
		159	# define EV_USE_POLL 1
		160	# endif
		161	#endif
		162
		163	#ifndef EV_USE_EPOLL
		164	# define EV_USE_EPOLL 0
		165	#endif
		166
		167	#ifndef EV_USE_KQUEUE
		168	# define EV_USE_KQUEUE 0
		169	#endif
		170
		171	#ifndef EV_USE_PORT
		172	# define EV_USE_PORT 0
		173	#endif
		174
		175	#ifndef EV_USE_INOTIFY
		176	# define EV_USE_INOTIFY 0
		177	#endif
		178
		179	#ifndef EV_PID_HASHSIZE
		180	# if EV_MINIMAL
		181	# define EV_PID_HASHSIZE 1
		182	# else
		183	# define EV_PID_HASHSIZE 16
		184	# endif
		185	#endif
		186
		187	#ifndef EV_INOTIFY_HASHSIZE
		188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
		192	# endif
		193	#endif
		194
		195	/**/
		196
10	#ifdef CLOCK_MONOTONIC	197	#ifndef CLOCK_MONOTONIC
		198	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	199	# define EV_USE_MONOTONIC 0
		200	#endif
		201
		202	#ifndef CLOCK_REALTIME
		203	# undef EV_USE_REALTIME
		204	# define EV_USE_REALTIME 0
		205	#endif
		206
		207	#if EV_SELECT_IS_WINSOCKET
		208	# include <winsock.h>
		209	#endif
		210
		211	#if !EV_STAT_ENABLE
		212	# define EV_USE_INOTIFY 0
		213	#endif
		214
		215	#if EV_USE_INOTIFY
		216	# include <sys/inotify.h>
		217	#endif
		218
		219	/**/
		220
		221	/*
		222	* This is used to avoid floating point rounding problems.
		223	* It is added to ev_rt_now when scheduling periodics
		224	* to ensure progress, time-wise, even when rounding
		225	* errors are against us.
		226	* This value is good at least till the year 4000.
		227	* Better solutions welcome.
		228	*/
		229	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		230
		231	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		232	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		233	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
		234
		235	#if __GNUC__ >= 3
		236	# define expect(expr,value) __builtin_expect ((expr),(value))
		237	# define noinline __attribute__ ((noinline))
		238	#else
		239	# define expect(expr,value) (expr)
		240	# define noinline
		241	# if __STDC_VERSION__ < 199901L
		242	# define inline
12	#endif	243	# endif
		244	#endif
13		245
14	#define HAVE_EPOLL 1	246	#define expect_false(expr) expect ((expr) != 0, 0)
15	#define HAVE_REALTIME 1	247	#define expect_true(expr) expect ((expr) != 0, 1)
16	#define HAVE_SELECT 0	248	#define inline_size static inline
17		249
18	#define MAX_BLOCKTIME 60.	250	#if EV_MINIMAL
		251	# define inline_speed static noinline
		252	#else
		253	# define inline_speed static inline
		254	#endif
19		255
		256	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		257	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		258
		259	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		260	#define EMPTY2(a,b) /* used to suppress some warnings */
		261
		262	typedef ev_watcher *W;
		263	typedef ev_watcher_list *WL;
		264	typedef ev_watcher_time *WT;
		265
		266	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		267
		268	#ifdef _WIN32
		269	# include "ev_win32.c"
		270	#endif
		271
		272	/*****************************************************************************/
		273
		274	static void (*syserr_cb)(const char *msg);
		275
		276	void
		277	ev_set_syserr_cb (void (*cb)(const char *msg))
		278	{
		279	syserr_cb = cb;
		280	}
		281
		282	static void noinline
		283	syserr (const char *msg)
		284	{
		285	if (!msg)
		286	msg = "(libev) system error";
		287
		288	if (syserr_cb)
		289	syserr_cb (msg);
		290	else
		291	{
		292	perror (msg);
		293	abort ();
		294	}
		295	}
		296
		297	static void *(*alloc)(void *ptr, long size);
		298
		299	void
		300	ev_set_allocator (void *(*cb)(void *ptr, long size))
		301	{
		302	alloc = cb;
		303	}
		304
		305	inline_speed void *
		306	ev_realloc (void *ptr, long size)
		307	{
		308	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		309
		310	if (!ptr && size)
		311	{
		312	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		313	abort ();
		314	}
		315
		316	return ptr;
		317	}
		318
		319	#define ev_malloc(size) ev_realloc (0, (size))
		320	#define ev_free(ptr) ev_realloc ((ptr), 0)
		321
		322	/*****************************************************************************/
		323
		324	typedef struct
		325	{
		326	WL head;
		327	unsigned char events;
		328	unsigned char reify;
		329	#if EV_SELECT_IS_WINSOCKET
		330	SOCKET handle;
		331	#endif
		332	} ANFD;
		333
		334	typedef struct
		335	{
		336	W w;
		337	int events;
		338	} ANPENDING;
		339
		340	#if EV_USE_INOTIFY
		341	typedef struct
		342	{
		343	WL head;
		344	} ANFS;
		345	#endif
		346
		347	#if EV_MULTIPLICITY
		348
		349	struct ev_loop
		350	{
		351	ev_tstamp ev_rt_now;
		352	#define ev_rt_now ((loop)->ev_rt_now)
		353	#define VAR(name,decl) decl;
		354	#include "ev_vars.h"
		355	#undef VAR
		356	};
20	#include "ev.h"	357	#include "ev_wrap.h"
21		358
22	struct ev_watcher {	359	static struct ev_loop default_loop_struct;
23	EV_WATCHER (ev_watcher);	360	struct ev_loop *ev_default_loop_ptr;
24	};
25		361
26	struct ev_watcher_list {	362	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		363
30	ev_tstamp ev_now;	364	ev_tstamp ev_rt_now;
31	int ev_method;	365	#define VAR(name,decl) static decl;
		366	#include "ev_vars.h"
		367	#undef VAR
32		368
33	static int have_monotonic; /* runtime */	369	static int ev_default_loop_ptr;
34		370
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	371	#endif
36	static void (*method_reify)(void);	372
37	static void (*method_poll)(ev_tstamp timeout);	373	/*****************************************************************************/
38		374
39	ev_tstamp	375	ev_tstamp
40	ev_time (void)	376	ev_time (void)
41	{	377	{
42	#if HAVE_REALTIME	378	#if EV_USE_REALTIME
43	struct timespec ts;	379	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	380	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	381	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	382	#else
47	struct timeval tv;	383	struct timeval tv;
48	gettimeofday (&tv, 0);	384	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	385	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	386	#endif
51	}	387	}
52		388
53	static ev_tstamp	389	ev_tstamp inline_size
54	get_clock (void)	390	get_clock (void)
55	{	391	{
56	#if HAVE_MONOTONIC	392	#if EV_USE_MONOTONIC
57	if (have_monotonic)	393	if (expect_true (have_monotonic))
58	{	394	{
59	struct timespec ts;	395	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	396	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	397	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	398	}
63	#endif	399	#endif
64		400
65	return ev_time ();	401	return ev_time ();
66	}	402	}
67		403
		404	#if EV_MULTIPLICITY
		405	ev_tstamp
		406	ev_now (EV_P)
		407	{
		408	return ev_rt_now;
		409	}
		410	#endif
		411
		412	int inline_size
		413	array_nextsize (int elem, int cur, int cnt)
		414	{
		415	int ncur = cur + 1;
		416
		417	do
		418	ncur <<= 1;
		419	while (cnt > ncur);
		420
		421	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		422	if (elem * ncur > 4096)
		423	{
		424	ncur *= elem;
		425	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		426	ncur = ncur - sizeof (void *) * 4;
		427	ncur /= elem;
		428	}
		429
		430	return ncur;
		431	}
		432
		433	static noinline void *
		434	array_realloc (int elem, void *base, int *cur, int cnt)
		435	{
		436	*cur = array_nextsize (elem, *cur, cnt);
		437	return ev_realloc (base, elem * *cur);
		438	}
		439
68	#define array_needsize(base,cur,cnt,init) \	440	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	441	if (expect_false ((cnt) > (cur))) \
70	{ \	442	{ \
71	int newcnt = cur ? cur << 1 : 16; \	443	int ocur_ = (cur); \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	444	(base) = (type *)array_realloc \
73	base = realloc (base, sizeof (*base) * (newcnt)); \	445	(sizeof (type), (base), &(cur), (cnt)); \
74	init (base + cur, newcnt - cur); \	446	init ((base) + (ocur_), (cur) - ocur_); \
75	cur = newcnt; \	447	}
		448
		449	#if 0
		450	#define array_slim(type,stem) \
		451	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		452	{ \
		453	stem ## max = array_roundsize (stem ## cnt >> 1); \
		454	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		455	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		456	}
		457	#endif
		458
		459	#define array_free(stem, idx) \
		460	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		461
		462	/*****************************************************************************/
		463
		464	void noinline
		465	ev_feed_event (EV_P_ void *w, int revents)
		466	{
		467	W w_ = (W)w;
		468	int pri = ABSPRI (w_);
		469
		470	if (expect_false (w_->pending))
		471	pendings [pri][w_->pending - 1].events |= revents;
		472	else
		473	{
		474	w_->pending = ++pendingcnt [pri];
		475	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		476	pendings [pri][w_->pending - 1].w = w_;
		477	pendings [pri][w_->pending - 1].events = revents;
		478	}
		479	}
		480
		481	void inline_speed
		482	queue_events (EV_P_ W *events, int eventcnt, int type)
		483	{
		484	int i;
		485
		486	for (i = 0; i < eventcnt; ++i)
		487	ev_feed_event (EV_A_ events [i], type);
		488	}
		489
		490	/*****************************************************************************/
		491
		492	void inline_size
		493	anfds_init (ANFD *base, int count)
		494	{
		495	while (count--)
		496	{
		497	base->head = 0;
		498	base->events = EV_NONE;
		499	base->reify = 0;
		500
		501	++base;
		502	}
		503	}
		504
		505	void inline_speed
		506	fd_event (EV_P_ int fd, int revents)
		507	{
		508	ANFD *anfd = anfds + fd;
		509	ev_io *w;
		510
		511	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		512	{
		513	int ev = w->events & revents;
		514
		515	if (ev)
		516	ev_feed_event (EV_A_ (W)w, ev);
		517	}
		518	}
		519
		520	void
		521	ev_feed_fd_event (EV_P_ int fd, int revents)
		522	{
		523	if (fd >= 0 && fd < anfdmax)
		524	fd_event (EV_A_ fd, revents);
		525	}
		526
		527	void inline_size
		528	fd_reify (EV_P)
		529	{
		530	int i;
		531
		532	for (i = 0; i < fdchangecnt; ++i)
		533	{
		534	int fd = fdchanges [i];
		535	ANFD *anfd = anfds + fd;
		536	ev_io *w;
		537
		538	unsigned char events = 0;
		539
		540	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		541	events |= (unsigned char)w->events;
		542
		543	#if EV_SELECT_IS_WINSOCKET
		544	if (events)
		545	{
		546	unsigned long argp;
		547	anfd->handle = _get_osfhandle (fd);
		548	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		549	}
		550	#endif
		551
		552	{
		553	unsigned char o_events = anfd->events;
		554	unsigned char o_reify = anfd->reify;
		555
		556	anfd->reify = 0;
		557	anfd->events = events;
		558
		559	if (o_events != events || o_reify & EV_IOFDSET)
		560	backend_modify (EV_A_ fd, o_events, events);
76	}	561	}
		562	}
		563
		564	fdchangecnt = 0;
		565	}
		566
		567	void inline_size
		568	fd_change (EV_P_ int fd, int flags)
		569	{
		570	unsigned char reify = anfds [fd].reify;
		571	anfds [fd].reify |= flags;
		572
		573	if (expect_true (!reify))
		574	{
		575	++fdchangecnt;
		576	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		577	fdchanges [fdchangecnt - 1] = fd;
		578	}
		579	}
		580
		581	void inline_speed
		582	fd_kill (EV_P_ int fd)
		583	{
		584	ev_io *w;
		585
		586	while ((w = (ev_io *)anfds [fd].head))
		587	{
		588	ev_io_stop (EV_A_ w);
		589	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		590	}
		591	}
		592
		593	int inline_size
		594	fd_valid (int fd)
		595	{
		596	#ifdef _WIN32
		597	return _get_osfhandle (fd) != -1;
		598	#else
		599	return fcntl (fd, F_GETFD) != -1;
		600	#endif
		601	}
		602
		603	/* called on EBADF to verify fds */
		604	static void noinline
		605	fd_ebadf (EV_P)
		606	{
		607	int fd;
		608
		609	for (fd = 0; fd < anfdmax; ++fd)
		610	if (anfds [fd].events)
		611	if (!fd_valid (fd) == -1 && errno == EBADF)
		612	fd_kill (EV_A_ fd);
		613	}
		614
		615	/* called on ENOMEM in select/poll to kill some fds and retry */
		616	static void noinline
		617	fd_enomem (EV_P)
		618	{
		619	int fd;
		620
		621	for (fd = anfdmax; fd--; )
		622	if (anfds [fd].events)
		623	{
		624	fd_kill (EV_A_ fd);
		625	return;
		626	}
		627	}
		628
		629	/* usually called after fork if backend needs to re-arm all fds from scratch */
		630	static void noinline
		631	fd_rearm_all (EV_P)
		632	{
		633	int fd;
		634
		635	for (fd = 0; fd < anfdmax; ++fd)
		636	if (anfds [fd].events)
		637	{
		638	anfds [fd].events = 0;
		639	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		640	}
		641	}
		642
		643	/*****************************************************************************/
		644
		645	void inline_speed
		646	upheap (WT *heap, int k)
		647	{
		648	WT w = heap [k];
		649
		650	while (k)
		651	{
		652	int p = (k - 1) >> 1;
		653
		654	if (heap [p]->at <= w->at)
		655	break;
		656
		657	heap [k] = heap [p];
		658	((W)heap [k])->active = k + 1;
		659	k = p;
		660	}
		661
		662	heap [k] = w;
		663	((W)heap [k])->active = k + 1;
		664	}
		665
		666	void inline_speed
		667	downheap (WT *heap, int N, int k)
		668	{
		669	WT w = heap [k];
		670
		671	for (;;)
		672	{
		673	int c = (k << 1) + 1;
		674
		675	if (c >= N)
		676	break;
		677
		678	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		679	? 1 : 0;
		680
		681	if (w->at <= heap [c]->at)
		682	break;
		683
		684	heap [k] = heap [c];
		685	((W)heap [k])->active = k + 1;
		686
		687	k = c;
		688	}
		689
		690	heap [k] = w;
		691	((W)heap [k])->active = k + 1;
		692	}
		693
		694	void inline_size
		695	adjustheap (WT *heap, int N, int k)
		696	{
		697	upheap (heap, k);
		698	downheap (heap, N, k);
		699	}
		700
		701	/*****************************************************************************/
77		702
78	typedef struct	703	typedef struct
79	{	704	{
80	struct ev_io *head;	705	WL head;
81	unsigned char wev, rev; /* want, received event set */	706	sig_atomic_t volatile gotsig;
82	} ANFD;	707	} ANSIG;
83		708
84	static ANFD *anfds;	709	static ANSIG *signals;
85	static int anfdmax;	710	static int signalmax;
86		711
87	static int *fdchanges;	712	static int sigpipe [2];
88	static int fdchangemax, fdchangecnt;	713	static sig_atomic_t volatile gotsig;
		714	static ev_io sigev;
		715
		716	void inline_size
		717	signals_init (ANSIG *base, int count)
		718	{
		719	while (count--)
		720	{
		721	base->head = 0;
		722	base->gotsig = 0;
		723
		724	++base;
		725	}
		726	}
89		727
90	static void	728	static void
91	anfds_init (ANFD *base, int count)	729	sighandler (int signum)
92	{	730	{
93	while (count--)	731	#if _WIN32
94	{	732	signal (signum, sighandler);
95	base->head = 0;	733	#endif
96	base->wev = base->rev = EV_NONE;	734
97	++base;	735	signals [signum - 1].gotsig = 1;
		736
		737	if (!gotsig)
98	}	738	{
		739	int old_errno = errno;
		740	gotsig = 1;
		741	write (sigpipe [1], &signum, 1);
		742	errno = old_errno;
		743	}
99	}	744	}
100		745
101	typedef struct	746	void noinline
		747	ev_feed_signal_event (EV_P_ int signum)
102	{	748	{
103	struct ev_watcher *w;	749	WL w;
104	int events;
105	} ANPENDING;
106		750
107	static ANPENDING *pendings;	751	#if EV_MULTIPLICITY
108	static int pendingmax, pendingcnt;	752	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		753	#endif
		754
		755	--signum;
		756
		757	if (signum < 0 || signum >= signalmax)
		758	return;
		759
		760	signals [signum].gotsig = 0;
		761
		762	for (w = signals [signum].head; w; w = w->next)
		763	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		764	}
109		765
110	static void	766	static void
111	event (struct ev_watcher *w, int events)	767	sigcb (EV_P_ ev_io *iow, int revents)
112	{	768	{
113	w->pending = ++pendingcnt;	769	int signum;
114	array_needsize (pendings, pendingmax, pendingcnt, );	770
115	pendings [pendingcnt - 1].w = w;	771	read (sigpipe [0], &revents, 1);
116	pendings [pendingcnt - 1].events = events;	772	gotsig = 0;
		773
		774	for (signum = signalmax; signum--; )
		775	if (signals [signum].gotsig)
		776	ev_feed_signal_event (EV_A_ signum + 1);
117	}	777	}
		778
		779	void inline_speed
		780	fd_intern (int fd)
		781	{
		782	#ifdef _WIN32
		783	int arg = 1;
		784	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		785	#else
		786	fcntl (fd, F_SETFD, FD_CLOEXEC);
		787	fcntl (fd, F_SETFL, O_NONBLOCK);
		788	#endif
		789	}
		790
		791	static void noinline
		792	siginit (EV_P)
		793	{
		794	fd_intern (sigpipe [0]);
		795	fd_intern (sigpipe [1]);
		796
		797	ev_io_set (&sigev, sigpipe [0], EV_READ);
		798	ev_io_start (EV_A_ &sigev);
		799	ev_unref (EV_A); /* child watcher should not keep loop alive */
		800	}
		801
		802	/*****************************************************************************/
		803
		804	static WL childs [EV_PID_HASHSIZE];
		805
		806	#ifndef _WIN32
		807
		808	static ev_signal childev;
		809
		810	void inline_speed
		811	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		812	{
		813	ev_child *w;
		814
		815	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		816	if (w->pid == pid || !w->pid)
		817	{
		818	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		819	w->rpid = pid;
		820	w->rstatus = status;
		821	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		822	}
		823	}
		824
		825	#ifndef WCONTINUED
		826	# define WCONTINUED 0
		827	#endif
118		828
119	static void	829	static void
120	fd_event (int fd, int events)	830	childcb (EV_P_ ev_signal *sw, int revents)
121	{	831	{
122	ANFD *anfd = anfds + fd;	832	int pid, status;
123	struct ev_io *w;
124		833
125	for (w = anfd->head; w; w = w->next)	834	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
126	{	835	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
127	int ev = w->events & events;	836	if (!WCONTINUED
		837	|| errno != EINVAL
		838	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		839	return;
128		840
129	if (ev)	841	/* make sure we are called again until all childs have been reaped */
130	event ((struct ev_watcher *)w, ev);	842	/* we need to do it this way so that the callback gets called before we continue */
131	}	843	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
132	}
133		844
134	static struct ev_timer **timers;	845	child_reap (EV_A_ sw, pid, pid, status);
135	static int timermax, timercnt;	846	if (EV_PID_HASHSIZE > 1)
136		847	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
137	static void
138	upheap (int k)
139	{
140	struct ev_timer *w = timers [k];
141
142	while (k && timers [k >> 1]->at > w->at)
143	{
144	timers [k] = timers [k >> 1];
145	timers [k]->active = k + 1;
146	k >>= 1;
147	}
148
149	timers [k] = w;
150	timers [k]->active = k + 1;
151
152	}	848	}
153		849
154	static void	850	#endif
155	downheap (int k)
156	{
157	struct ev_timer *w = timers [k];
158		851
159	while (k < (timercnt >> 1))	852	/*****************************************************************************/
160	{
161	int j = k << 1;
162		853
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	854	#if EV_USE_PORT
164	++j;	855	# include "ev_port.c"
165		856	#endif
166	if (w->at <= timers [j]->at)	857	#if EV_USE_KQUEUE
167	break;	858	# include "ev_kqueue.c"
168		859	#endif
169	timers [k] = timers [j];
170	timers [k]->active = k + 1;
171	k = j;
172	}
173
174	timers [k] = w;
175	timers [k]->active = k + 1;
176	}
177
178	static struct ev_signal **signals;
179	static int signalmax, signalcnt;
180
181	static void
182	signals_init (struct ev_signal **base, int count)
183	{
184	while (count--)
185	*base++ = 0;
186	}
187
188	#if HAVE_EPOLL	860	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	861	# include "ev_epoll.c"
190	#endif	862	#endif
		863	#if EV_USE_POLL
		864	# include "ev_poll.c"
		865	#endif
191	#if HAVE_SELECT	866	#if EV_USE_SELECT
192	# include "ev_select.c"	867	# include "ev_select.c"
193	#endif	868	#endif
194		869
195	int ev_init (int flags)	870	int
		871	ev_version_major (void)
196	{	872	{
		873	return EV_VERSION_MAJOR;
		874	}
		875
		876	int
		877	ev_version_minor (void)
		878	{
		879	return EV_VERSION_MINOR;
		880	}
		881
		882	/* return true if we are running with elevated privileges and should ignore env variables */
		883	int inline_size
		884	enable_secure (void)
		885	{
		886	#ifdef _WIN32
		887	return 0;
		888	#else
		889	return getuid () != geteuid ()
		890	|| getgid () != getegid ();
		891	#endif
		892	}
		893
		894	unsigned int
		895	ev_supported_backends (void)
		896	{
		897	unsigned int flags = 0;
		898
		899	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		900	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		901	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		902	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		903	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		904
		905	return flags;
		906	}
		907
		908	unsigned int
		909	ev_recommended_backends (void)
		910	{
		911	unsigned int flags = ev_supported_backends ();
		912
		913	#ifndef __NetBSD__
		914	/* kqueue is borked on everything but netbsd apparently */
		915	/* it usually doesn't work correctly on anything but sockets and pipes */
		916	flags &= ~EVBACKEND_KQUEUE;
		917	#endif
		918	#ifdef __APPLE__
		919	// flags &= ~EVBACKEND_KQUEUE; for documentation
		920	flags &= ~EVBACKEND_POLL;
		921	#endif
		922
		923	return flags;
		924	}
		925
		926	unsigned int
		927	ev_embeddable_backends (void)
		928	{
		929	return EVBACKEND_EPOLL
		930	| EVBACKEND_KQUEUE
		931	| EVBACKEND_PORT;
		932	}
		933
		934	unsigned int
		935	ev_backend (EV_P)
		936	{
		937	return backend;
		938	}
		939
		940	unsigned int
		941	ev_loop_count (EV_P)
		942	{
		943	return loop_count;
		944	}
		945
		946	static void noinline
		947	loop_init (EV_P_ unsigned int flags)
		948	{
		949	if (!backend)
		950	{
197	#if HAVE_MONOTONIC	951	#if EV_USE_MONOTONIC
198	{	952	{
199	struct timespec ts;	953	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	954	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	955	have_monotonic = 1;
202	}	956	}
203	#endif	957	#endif
204		958
205	ev_now = ev_time ();	959	ev_rt_now = ev_time ();
		960	mn_now = get_clock ();
		961	now_floor = mn_now;
		962	rtmn_diff = ev_rt_now - mn_now;
206		963
		964	/* pid check not overridable via env */
		965	#ifndef _WIN32
		966	if (flags & EVFLAG_FORKCHECK)
		967	curpid = getpid ();
		968	#endif
		969
		970	if (!(flags & EVFLAG_NOENV)
		971	&& !enable_secure ()
		972	&& getenv ("LIBEV_FLAGS"))
		973	flags = atoi (getenv ("LIBEV_FLAGS"));
		974
		975	if (!(flags & 0x0000ffffUL))
		976	flags |= ev_recommended_backends ();
		977
		978	backend = 0;
		979	backend_fd = -1;
		980	#if EV_USE_INOTIFY
		981	fs_fd = -2;
		982	#endif
		983
		984	#if EV_USE_PORT
		985	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		986	#endif
		987	#if EV_USE_KQUEUE
		988	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		989	#endif
207	#if HAVE_EPOLL	990	#if EV_USE_EPOLL
208	if (epoll_init (flags))	991	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
209	return ev_method;
210	#endif	992	#endif
		993	#if EV_USE_POLL
		994	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		995	#endif
211	#if HAVE_SELECT	996	#if EV_USE_SELECT
212	if (select_init (flags))	997	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
213	return ev_method;
214	#endif	998	#endif
215		999
216	ev_method = EVMETHOD_NONE;	1000	ev_init (&sigev, sigcb);
217	return ev_method;	1001	ev_set_priority (&sigev, EV_MAXPRI);
		1002	}
218	}	1003	}
219		1004
220	void ev_prefork (void)	1005	static void noinline
221	{	1006	loop_destroy (EV_P)
222	}
223
224	void ev_postfork_parent (void)
225	{
226	}
227
228	void ev_postfork_child (void)
229	{
230	#if HAVE_EPOLL
231	epoll_postfork_child ();
232	#endif
233	}
234
235	static void
236	call_pending ()
237	{	1007	{
238	int i;	1008	int i;
239		1009
240	for (i = 0; i < pendingcnt; ++i)	1010	#if EV_USE_INOTIFY
		1011	if (fs_fd >= 0)
		1012	close (fs_fd);
		1013	#endif
		1014
		1015	if (backend_fd >= 0)
		1016	close (backend_fd);
		1017
		1018	#if EV_USE_PORT
		1019	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1020	#endif
		1021	#if EV_USE_KQUEUE
		1022	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1023	#endif
		1024	#if EV_USE_EPOLL
		1025	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1026	#endif
		1027	#if EV_USE_POLL
		1028	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1029	#endif
		1030	#if EV_USE_SELECT
		1031	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1032	#endif
		1033
		1034	for (i = NUMPRI; i--; )
		1035	{
		1036	array_free (pending, [i]);
		1037	#if EV_IDLE_ENABLE
		1038	array_free (idle, [i]);
		1039	#endif
241	{	1040	}
242	ANPENDING *p = pendings + i;
243		1041
244	if (p->w)	1042	/* have to use the microsoft-never-gets-it-right macro */
		1043	array_free (fdchange, EMPTY);
		1044	array_free (timer, EMPTY);
		1045	#if EV_PERIODIC_ENABLE
		1046	array_free (periodic, EMPTY);
		1047	#endif
		1048	array_free (prepare, EMPTY);
		1049	array_free (check, EMPTY);
		1050
		1051	backend = 0;
		1052	}
		1053
		1054	void inline_size infy_fork (EV_P);
		1055
		1056	void inline_size
		1057	loop_fork (EV_P)
		1058	{
		1059	#if EV_USE_PORT
		1060	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1061	#endif
		1062	#if EV_USE_KQUEUE
		1063	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1064	#endif
		1065	#if EV_USE_EPOLL
		1066	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1067	#endif
		1068	#if EV_USE_INOTIFY
		1069	infy_fork (EV_A);
		1070	#endif
		1071
		1072	if (ev_is_active (&sigev))
		1073	{
		1074	/* default loop */
		1075
		1076	ev_ref (EV_A);
		1077	ev_io_stop (EV_A_ &sigev);
		1078	close (sigpipe [0]);
		1079	close (sigpipe [1]);
		1080
		1081	while (pipe (sigpipe))
		1082	syserr ("(libev) error creating pipe");
		1083
		1084	siginit (EV_A);
		1085	}
		1086
		1087	postfork = 0;
		1088	}
		1089
		1090	#if EV_MULTIPLICITY
		1091	struct ev_loop *
		1092	ev_loop_new (unsigned int flags)
		1093	{
		1094	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1095
		1096	memset (loop, 0, sizeof (struct ev_loop));
		1097
		1098	loop_init (EV_A_ flags);
		1099
		1100	if (ev_backend (EV_A))
		1101	return loop;
		1102
		1103	return 0;
		1104	}
		1105
		1106	void
		1107	ev_loop_destroy (EV_P)
		1108	{
		1109	loop_destroy (EV_A);
		1110	ev_free (loop);
		1111	}
		1112
		1113	void
		1114	ev_loop_fork (EV_P)
		1115	{
		1116	postfork = 1;
		1117	}
		1118
		1119	#endif
		1120
		1121	#if EV_MULTIPLICITY
		1122	struct ev_loop *
		1123	ev_default_loop_init (unsigned int flags)
		1124	#else
		1125	int
		1126	ev_default_loop (unsigned int flags)
		1127	#endif
		1128	{
		1129	if (sigpipe [0] == sigpipe [1])
		1130	if (pipe (sigpipe))
		1131	return 0;
		1132
		1133	if (!ev_default_loop_ptr)
		1134	{
		1135	#if EV_MULTIPLICITY
		1136	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1137	#else
		1138	ev_default_loop_ptr = 1;
		1139	#endif
		1140
		1141	loop_init (EV_A_ flags);
		1142
		1143	if (ev_backend (EV_A))
245	{	1144	{
246	p->w->pending = 0;	1145	siginit (EV_A);
247	p->w->cb (p->w, p->events);	1146
		1147	#ifndef _WIN32
		1148	ev_signal_init (&childev, childcb, SIGCHLD);
		1149	ev_set_priority (&childev, EV_MAXPRI);
		1150	ev_signal_start (EV_A_ &childev);
		1151	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1152	#endif
248	}	1153	}
		1154	else
		1155	ev_default_loop_ptr = 0;
		1156	}
		1157
		1158	return ev_default_loop_ptr;
		1159	}
		1160
		1161	void
		1162	ev_default_destroy (void)
		1163	{
		1164	#if EV_MULTIPLICITY
		1165	struct ev_loop *loop = ev_default_loop_ptr;
		1166	#endif
		1167
		1168	#ifndef _WIN32
		1169	ev_ref (EV_A); /* child watcher */
		1170	ev_signal_stop (EV_A_ &childev);
		1171	#endif
		1172
		1173	ev_ref (EV_A); /* signal watcher */
		1174	ev_io_stop (EV_A_ &sigev);
		1175
		1176	close (sigpipe [0]); sigpipe [0] = 0;
		1177	close (sigpipe [1]); sigpipe [1] = 0;
		1178
		1179	loop_destroy (EV_A);
		1180	}
		1181
		1182	void
		1183	ev_default_fork (void)
		1184	{
		1185	#if EV_MULTIPLICITY
		1186	struct ev_loop *loop = ev_default_loop_ptr;
		1187	#endif
		1188
		1189	if (backend)
		1190	postfork = 1;
		1191	}
		1192
		1193	/*****************************************************************************/
		1194
		1195	void
		1196	ev_invoke (EV_P_ void *w, int revents)
		1197	{
		1198	EV_CB_INVOKE ((W)w, revents);
		1199	}
		1200
		1201	void inline_speed
		1202	call_pending (EV_P)
		1203	{
		1204	int pri;
		1205
		1206	for (pri = NUMPRI; pri--; )
		1207	while (pendingcnt [pri])
		1208	{
		1209	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1210
		1211	if (expect_true (p->w))
		1212	{
		1213	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1214
		1215	p->w->pending = 0;
		1216	EV_CB_INVOKE (p->w, p->events);
		1217	}
249	}	1218	}
250
251	pendingcnt = 0;
252	}	1219	}
253		1220
254	static void	1221	void inline_size
255	timer_reify (void)	1222	timers_reify (EV_P)
256	{	1223	{
257	while (timercnt && timers [0]->at <= ev_now)	1224	while (timercnt && ((WT)timers [0])->at <= mn_now)
258	{	1225	{
259	struct ev_timer *w = timers [0];	1226	ev_timer *w = (ev_timer *)timers [0];
260		1227
261	fprintf (stderr, "0 %f, %d c%d\n", w->at, w->active, timercnt);//D	1228	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1229
262	/* first reschedule timer */	1230	/* first reschedule or stop timer */
263	if (w->repeat)	1231	if (w->repeat)
264	{	1232	{
265	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	1233	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
266	if (w->is_abs)	1234
267	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
268	else
269	w->at = ev_now + w->repeat;	1235	((WT)w)->at += w->repeat;
		1236	if (((WT)w)->at < mn_now)
		1237	((WT)w)->at = mn_now;
270		1238
271	fprintf (stderr, "b %f\n", w->at);//D	1239	downheap (timers, timercnt, 0);
272
273	downheap (0);
274	}	1240	}
275	else	1241	else
		1242	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1243
		1244	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1245	}
		1246	}
		1247
		1248	#if EV_PERIODIC_ENABLE
		1249	void inline_size
		1250	periodics_reify (EV_P)
		1251	{
		1252	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1253	{
		1254	ev_periodic *w = (ev_periodic *)periodics [0];
		1255
		1256	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1257
		1258	/* first reschedule or stop timer */
		1259	if (w->reschedule_cb)
276	{	1260	{
277	fprintf (stderr, "c %f, %d c%d\n", w->at, w->active, timercnt);//D	1261	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
278	evtimer_stop (w); /* nonrepeating: stop timer */	1262	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1263	downheap (periodics, periodiccnt, 0);
279	}	1264	}
		1265	else if (w->interval)
		1266	{
		1267	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1268	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1269	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1270	downheap (periodics, periodiccnt, 0);
		1271	}
		1272	else
		1273	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
280		1274
281	event ((struct ev_watcher *)w, EV_TIMEOUT);	1275	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1276	}
		1277	}
		1278
		1279	static void noinline
		1280	periodics_reschedule (EV_P)
		1281	{
		1282	int i;
		1283
		1284	/* adjust periodics after time jump */
		1285	for (i = 0; i < periodiccnt; ++i)
282	}	1286	{
283	}	1287	ev_periodic *w = (ev_periodic *)periodics [i];
284		1288
285	int ev_loop_done;	1289	if (w->reschedule_cb)
		1290	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1291	else if (w->interval)
		1292	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1293	}
286		1294
		1295	/* now rebuild the heap */
		1296	for (i = periodiccnt >> 1; i--; )
		1297	downheap (periodics, periodiccnt, i);
		1298	}
		1299	#endif
		1300
		1301	#if EV_IDLE_ENABLE
		1302	void inline_size
		1303	idle_reify (EV_P)
		1304	{
		1305	if (expect_false (idleall))
		1306	{
		1307	int pri;
		1308
		1309	for (pri = NUMPRI; pri--; )
		1310	{
		1311	if (pendingcnt [pri])
		1312	break;
		1313
		1314	if (idlecnt [pri])
		1315	{
		1316	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1317	break;
		1318	}
		1319	}
		1320	}
		1321	}
		1322	#endif
		1323
		1324	void inline_speed
		1325	time_update (EV_P_ ev_tstamp max_block)
		1326	{
		1327	int i;
		1328
		1329	#if EV_USE_MONOTONIC
		1330	if (expect_true (have_monotonic))
		1331	{
		1332	ev_tstamp odiff = rtmn_diff;
		1333
		1334	mn_now = get_clock ();
		1335
		1336	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1337	/* interpolate in the meantime */
		1338	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1339	{
		1340	ev_rt_now = rtmn_diff + mn_now;
		1341	return;
		1342	}
		1343
		1344	now_floor = mn_now;
		1345	ev_rt_now = ev_time ();
		1346
		1347	/* loop a few times, before making important decisions.
		1348	* on the choice of "4": one iteration isn't enough,
		1349	* in case we get preempted during the calls to
		1350	* ev_time and get_clock. a second call is almost guaranteed
		1351	* to succeed in that case, though. and looping a few more times
		1352	* doesn't hurt either as we only do this on time-jumps or
		1353	* in the unlikely event of having been preempted here.
		1354	*/
		1355	for (i = 4; --i; )
		1356	{
		1357	rtmn_diff = ev_rt_now - mn_now;
		1358
		1359	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1360	return; /* all is well */
		1361
		1362	ev_rt_now = ev_time ();
		1363	mn_now = get_clock ();
		1364	now_floor = mn_now;
		1365	}
		1366
		1367	# if EV_PERIODIC_ENABLE
		1368	periodics_reschedule (EV_A);
		1369	# endif
		1370	/* no timer adjustment, as the monotonic clock doesn't jump */
		1371	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1372	}
		1373	else
		1374	#endif
		1375	{
		1376	ev_rt_now = ev_time ();
		1377
		1378	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1379	{
		1380	#if EV_PERIODIC_ENABLE
		1381	periodics_reschedule (EV_A);
		1382	#endif
		1383	/* adjust timers. this is easy, as the offset is the same for all of them */
		1384	for (i = 0; i < timercnt; ++i)
		1385	((WT)timers [i])->at += ev_rt_now - mn_now;
		1386	}
		1387
		1388	mn_now = ev_rt_now;
		1389	}
		1390	}
		1391
		1392	void
		1393	ev_ref (EV_P)
		1394	{
		1395	++activecnt;
		1396	}
		1397
		1398	void
		1399	ev_unref (EV_P)
		1400	{
		1401	--activecnt;
		1402	}
		1403
		1404	static int loop_done;
		1405
		1406	void
287	int ev_loop (int flags)	1407	ev_loop (EV_P_ int flags)
288	{	1408	{
289	double block;
290	ev_loop_done = flags & EVLOOP_ONESHOT;	1409	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1410	? EVUNLOOP_ONE
		1411	: EVUNLOOP_CANCEL;
		1412
		1413	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
291		1414
292	do	1415	do
293	{	1416	{
		1417	#ifndef _WIN32
		1418	if (expect_false (curpid)) /* penalise the forking check even more */
		1419	if (expect_false (getpid () != curpid))
		1420	{
		1421	curpid = getpid ();
		1422	postfork = 1;
		1423	}
		1424	#endif
		1425
		1426	#if EV_FORK_ENABLE
		1427	/* we might have forked, so queue fork handlers */
		1428	if (expect_false (postfork))
		1429	if (forkcnt)
		1430	{
		1431	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1432	call_pending (EV_A);
		1433	}
		1434	#endif
		1435
		1436	/* queue prepare watchers (and execute them) */
		1437	if (expect_false (preparecnt))
		1438	{
		1439	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1440	call_pending (EV_A);
		1441	}
		1442
		1443	if (expect_false (!activecnt))
		1444	break;
		1445
		1446	/* we might have forked, so reify kernel state if necessary */
		1447	if (expect_false (postfork))
		1448	loop_fork (EV_A);
		1449
294	/* update fd-related kernel structures */	1450	/* update fd-related kernel structures */
295	method_reify (); fdchangecnt = 0;	1451	fd_reify (EV_A);
296		1452
297	/* calculate blocking time */	1453	/* calculate blocking time */
298	ev_now = ev_time ();	1454	{
		1455	ev_tstamp block;
299		1456
300	if (flags & EVLOOP_NONBLOCK)	1457	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
301	block = 0.;	1458	block = 0.; /* do not block at all */
302	else if (!timercnt)	1459	else
		1460	{
		1461	/* update time to cancel out callback processing overhead */
		1462	time_update (EV_A_ 1e100);
		1463
303	block = MAX_BLOCKTIME;	1464	block = MAX_BLOCKTIME;
304	else	1465
		1466	if (timercnt)
305	{	1467	{
306	block = timers [0]->at - ev_now + method_fudge;	1468	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
		1469	if (block > to) block = to;
		1470	}
		1471
		1472	#if EV_PERIODIC_ENABLE
		1473	if (periodiccnt)
		1474	{
		1475	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
		1476	if (block > to) block = to;
		1477	}
		1478	#endif
		1479
307	if (block < 0.) block = 0.;	1480	if (expect_false (block < 0.)) block = 0.;
308	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
309	}	1481	}
310		1482
311	fprintf (stderr, "block %f\n", block);//D	1483	++loop_count;
312	method_poll (block);	1484	backend_poll (EV_A_ block);
313		1485
		1486	/* update ev_rt_now, do magic */
		1487	time_update (EV_A_ block);
		1488	}
		1489
314	/* put pending timers into pendign queue and reschedule them */	1490	/* queue pending timers and reschedule them */
		1491	timers_reify (EV_A); /* relative timers called last */
		1492	#if EV_PERIODIC_ENABLE
		1493	periodics_reify (EV_A); /* absolute timers called first */
		1494	#endif
		1495
		1496	#if EV_IDLE_ENABLE
		1497	/* queue idle watchers unless other events are pending */
315	timer_reify ();	1498	idle_reify (EV_A);
		1499	#endif
316		1500
317	ev_now = ev_time ();	1501	/* queue check watchers, to be executed first */
		1502	if (expect_false (checkcnt))
		1503	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1504
318	call_pending ();	1505	call_pending (EV_A);
319	}
320	while (!ev_loop_done);
321	}
322		1506
323	static void	1507	}
324	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1508	while (expect_true (activecnt && !loop_done));
		1509
		1510	if (loop_done == EVUNLOOP_ONE)
		1511	loop_done = EVUNLOOP_CANCEL;
		1512	}
		1513
		1514	void
		1515	ev_unloop (EV_P_ int how)
		1516	{
		1517	loop_done = how;
		1518	}
		1519
		1520	/*****************************************************************************/
		1521
		1522	void inline_size
		1523	wlist_add (WL *head, WL elem)
325	{	1524	{
326	elem->next = *head;	1525	elem->next = *head;
327	*head = elem;	1526	*head = elem;
328	}	1527	}
329		1528
330	static void	1529	void inline_size
331	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1530	wlist_del (WL *head, WL elem)
332	{	1531	{
333	while (*head)	1532	while (*head)
334	{	1533	{
335	if (*head == elem)	1534	if (*head == elem)
336	{	1535	{
…		…
340		1539
341	head = &(*head)->next;	1540	head = &(*head)->next;
342	}	1541	}
343	}	1542	}
344		1543
		1544	void inline_speed
		1545	clear_pending (EV_P_ W w)
		1546	{
		1547	if (w->pending)
		1548	{
		1549	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1550	w->pending = 0;
		1551	}
		1552	}
		1553
		1554	int
		1555	ev_clear_pending (EV_P_ void *w)
		1556	{
		1557	W w_ = (W)w;
		1558	int pending = w_->pending;
		1559
		1560	if (expect_true (pending))
		1561	{
		1562	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1563	w_->pending = 0;
		1564	p->w = 0;
		1565	return p->events;
		1566	}
		1567	else
		1568	return 0;
		1569	}
		1570
		1571	void inline_size
		1572	pri_adjust (EV_P_ W w)
		1573	{
		1574	int pri = w->priority;
		1575	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1576	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1577	w->priority = pri;
		1578	}
		1579
		1580	void inline_speed
		1581	ev_start (EV_P_ W w, int active)
		1582	{
		1583	pri_adjust (EV_A_ w);
		1584	w->active = active;
		1585	ev_ref (EV_A);
		1586	}
		1587
		1588	void inline_size
		1589	ev_stop (EV_P_ W w)
		1590	{
		1591	ev_unref (EV_A);
		1592	w->active = 0;
		1593	}
		1594
		1595	/*****************************************************************************/
		1596
		1597	void noinline
		1598	ev_io_start (EV_P_ ev_io *w)
		1599	{
		1600	int fd = w->fd;
		1601
		1602	if (expect_false (ev_is_active (w)))
		1603	return;
		1604
		1605	assert (("ev_io_start called with negative fd", fd >= 0));
		1606
		1607	ev_start (EV_A_ (W)w, 1);
		1608	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1609	wlist_add (&anfds[fd].head, (WL)w);
		1610
		1611	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1612	w->events &= ~EV_IOFDSET;
		1613	}
		1614
		1615	void noinline
		1616	ev_io_stop (EV_P_ ev_io *w)
		1617	{
		1618	clear_pending (EV_A_ (W)w);
		1619	if (expect_false (!ev_is_active (w)))
		1620	return;
		1621
		1622	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1623
		1624	wlist_del (&anfds[w->fd].head, (WL)w);
		1625	ev_stop (EV_A_ (W)w);
		1626
		1627	fd_change (EV_A_ w->fd, 1);
		1628	}
		1629
		1630	void noinline
		1631	ev_timer_start (EV_P_ ev_timer *w)
		1632	{
		1633	if (expect_false (ev_is_active (w)))
		1634	return;
		1635
		1636	((WT)w)->at += mn_now;
		1637
		1638	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1639
		1640	ev_start (EV_A_ (W)w, ++timercnt);
		1641	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1642	timers [timercnt - 1] = (WT)w;
		1643	upheap (timers, timercnt - 1);
		1644
		1645	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1646	}
		1647
		1648	void noinline
		1649	ev_timer_stop (EV_P_ ev_timer *w)
		1650	{
		1651	clear_pending (EV_A_ (W)w);
		1652	if (expect_false (!ev_is_active (w)))
		1653	return;
		1654
		1655	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1656
		1657	{
		1658	int active = ((W)w)->active;
		1659
		1660	if (expect_true (--active < --timercnt))
		1661	{
		1662	timers [active] = timers [timercnt];
		1663	adjustheap (timers, timercnt, active);
		1664	}
		1665	}
		1666
		1667	((WT)w)->at -= mn_now;
		1668
		1669	ev_stop (EV_A_ (W)w);
		1670	}
		1671
		1672	void noinline
		1673	ev_timer_again (EV_P_ ev_timer *w)
		1674	{
		1675	if (ev_is_active (w))
		1676	{
		1677	if (w->repeat)
		1678	{
		1679	((WT)w)->at = mn_now + w->repeat;
		1680	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1681	}
		1682	else
		1683	ev_timer_stop (EV_A_ w);
		1684	}
		1685	else if (w->repeat)
		1686	{
		1687	w->at = w->repeat;
		1688	ev_timer_start (EV_A_ w);
		1689	}
		1690	}
		1691
		1692	#if EV_PERIODIC_ENABLE
		1693	void noinline
		1694	ev_periodic_start (EV_P_ ev_periodic *w)
		1695	{
		1696	if (expect_false (ev_is_active (w)))
		1697	return;
		1698
		1699	if (w->reschedule_cb)
		1700	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1701	else if (w->interval)
		1702	{
		1703	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1704	/* this formula differs from the one in periodic_reify because we do not always round up */
		1705	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1706	}
		1707	else
		1708	((WT)w)->at = w->offset;
		1709
		1710	ev_start (EV_A_ (W)w, ++periodiccnt);
		1711	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
		1712	periodics [periodiccnt - 1] = (WT)w;
		1713	upheap (periodics, periodiccnt - 1);
		1714
		1715	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1716	}
		1717
		1718	void noinline
		1719	ev_periodic_stop (EV_P_ ev_periodic *w)
		1720	{
		1721	clear_pending (EV_A_ (W)w);
		1722	if (expect_false (!ev_is_active (w)))
		1723	return;
		1724
		1725	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1726
		1727	{
		1728	int active = ((W)w)->active;
		1729
		1730	if (expect_true (--active < --periodiccnt))
		1731	{
		1732	periodics [active] = periodics [periodiccnt];
		1733	adjustheap (periodics, periodiccnt, active);
		1734	}
		1735	}
		1736
		1737	ev_stop (EV_A_ (W)w);
		1738	}
		1739
		1740	void noinline
		1741	ev_periodic_again (EV_P_ ev_periodic *w)
		1742	{
		1743	/* TODO: use adjustheap and recalculation */
		1744	ev_periodic_stop (EV_A_ w);
		1745	ev_periodic_start (EV_A_ w);
		1746	}
		1747	#endif
		1748
		1749	#ifndef SA_RESTART
		1750	# define SA_RESTART 0
		1751	#endif
		1752
		1753	void noinline
		1754	ev_signal_start (EV_P_ ev_signal *w)
		1755	{
		1756	#if EV_MULTIPLICITY
		1757	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1758	#endif
		1759	if (expect_false (ev_is_active (w)))
		1760	return;
		1761
		1762	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1763
		1764	{
		1765	#ifndef _WIN32
		1766	sigset_t full, prev;
		1767	sigfillset (&full);
		1768	sigprocmask (SIG_SETMASK, &full, &prev);
		1769	#endif
		1770
		1771	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1772
		1773	#ifndef _WIN32
		1774	sigprocmask (SIG_SETMASK, &prev, 0);
		1775	#endif
		1776	}
		1777
		1778	ev_start (EV_A_ (W)w, 1);
		1779	wlist_add (&signals [w->signum - 1].head, (WL)w);
		1780
		1781	if (!((WL)w)->next)
		1782	{
		1783	#if _WIN32
		1784	signal (w->signum, sighandler);
		1785	#else
		1786	struct sigaction sa;
		1787	sa.sa_handler = sighandler;
		1788	sigfillset (&sa.sa_mask);
		1789	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1790	sigaction (w->signum, &sa, 0);
		1791	#endif
		1792	}
		1793	}
		1794
		1795	void noinline
		1796	ev_signal_stop (EV_P_ ev_signal *w)
		1797	{
		1798	clear_pending (EV_A_ (W)w);
		1799	if (expect_false (!ev_is_active (w)))
		1800	return;
		1801
		1802	wlist_del (&signals [w->signum - 1].head, (WL)w);
		1803	ev_stop (EV_A_ (W)w);
		1804
		1805	if (!signals [w->signum - 1].head)
		1806	signal (w->signum, SIG_DFL);
		1807	}
		1808
		1809	void
		1810	ev_child_start (EV_P_ ev_child *w)
		1811	{
		1812	#if EV_MULTIPLICITY
		1813	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1814	#endif
		1815	if (expect_false (ev_is_active (w)))
		1816	return;
		1817
		1818	ev_start (EV_A_ (W)w, 1);
		1819	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1820	}
		1821
		1822	void
		1823	ev_child_stop (EV_P_ ev_child *w)
		1824	{
		1825	clear_pending (EV_A_ (W)w);
		1826	if (expect_false (!ev_is_active (w)))
		1827	return;
		1828
		1829	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1830	ev_stop (EV_A_ (W)w);
		1831	}
		1832
		1833	#if EV_STAT_ENABLE
		1834
		1835	# ifdef _WIN32
		1836	# undef lstat
		1837	# define lstat(a,b) _stati64 (a,b)
		1838	# endif
		1839
		1840	#define DEF_STAT_INTERVAL 5.0074891
		1841	#define MIN_STAT_INTERVAL 0.1074891
		1842
		1843	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1844
		1845	#if EV_USE_INOTIFY
		1846	# define EV_INOTIFY_BUFSIZE 8192
		1847
		1848	static void noinline
		1849	infy_add (EV_P_ ev_stat *w)
		1850	{
		1851	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);
		1852
		1853	if (w->wd < 0)
		1854	{
		1855	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1856
		1857	/* monitor some parent directory for speedup hints */
		1858	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1859	{
		1860	char path [4096];
		1861	strcpy (path, w->path);
		1862
		1863	do
		1864	{
		1865	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1866	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1867
		1868	char *pend = strrchr (path, '/');
		1869
		1870	if (!pend)
		1871	break; /* whoops, no '/', complain to your admin */
		1872
		1873	*pend = 0;
		1874	w->wd = inotify_add_watch (fs_fd, path, mask);
		1875	}
		1876	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1877	}
		1878	}
		1879	else
		1880	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1881
		1882	if (w->wd >= 0)
		1883	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1884	}
		1885
		1886	static void noinline
		1887	infy_del (EV_P_ ev_stat *w)
		1888	{
		1889	int slot;
		1890	int wd = w->wd;
		1891
		1892	if (wd < 0)
		1893	return;
		1894
		1895	w->wd = -2;
		1896	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1897	wlist_del (&fs_hash [slot].head, (WL)w);
		1898
		1899	/* remove this watcher, if others are watching it, they will rearm */
		1900	inotify_rm_watch (fs_fd, wd);
		1901	}
		1902
		1903	static void noinline
		1904	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1905	{
		1906	if (slot < 0)
		1907	/* overflow, need to check for all hahs slots */
		1908	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1909	infy_wd (EV_A_ slot, wd, ev);
		1910	else
		1911	{
		1912	WL w_;
		1913
		1914	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1915	{
		1916	ev_stat *w = (ev_stat *)w_;
		1917	w_ = w_->next; /* lets us remove this watcher and all before it */
		1918
		1919	if (w->wd == wd || wd == -1)
		1920	{
		1921	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1922	{
		1923	w->wd = -1;
		1924	infy_add (EV_A_ w); /* re-add, no matter what */
		1925	}
		1926
		1927	stat_timer_cb (EV_A_ &w->timer, 0);
		1928	}
		1929	}
		1930	}
		1931	}
		1932
345	static void	1933	static void
346	ev_start (struct ev_watcher *w, int active)	1934	infy_cb (EV_P_ ev_io *w, int revents)
347	{	1935	{
348	w->pending = 0;	1936	char buf [EV_INOTIFY_BUFSIZE];
349	w->active = active;	1937	struct inotify_event *ev = (struct inotify_event *)buf;
		1938	int ofs;
		1939	int len = read (fs_fd, buf, sizeof (buf));
		1940
		1941	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1942	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1943	}
		1944
		1945	void inline_size
		1946	infy_init (EV_P)
		1947	{
		1948	if (fs_fd != -2)
		1949	return;
		1950
		1951	fs_fd = inotify_init ();
		1952
		1953	if (fs_fd >= 0)
		1954	{
		1955	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1956	ev_set_priority (&fs_w, EV_MAXPRI);
		1957	ev_io_start (EV_A_ &fs_w);
		1958	}
		1959	}
		1960
		1961	void inline_size
		1962	infy_fork (EV_P)
		1963	{
		1964	int slot;
		1965
		1966	if (fs_fd < 0)
		1967	return;
		1968
		1969	close (fs_fd);
		1970	fs_fd = inotify_init ();
		1971
		1972	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1973	{
		1974	WL w_ = fs_hash [slot].head;
		1975	fs_hash [slot].head = 0;
		1976
		1977	while (w_)
		1978	{
		1979	ev_stat *w = (ev_stat *)w_;
		1980	w_ = w_->next; /* lets us add this watcher */
		1981
		1982	w->wd = -1;
		1983
		1984	if (fs_fd >= 0)
		1985	infy_add (EV_A_ w); /* re-add, no matter what */
		1986	else
		1987	ev_timer_start (EV_A_ &w->timer);
		1988	}
		1989
		1990	}
		1991	}
		1992
		1993	#endif
		1994
		1995	void
		1996	ev_stat_stat (EV_P_ ev_stat *w)
		1997	{
		1998	if (lstat (w->path, &w->attr) < 0)
		1999	w->attr.st_nlink = 0;
		2000	else if (!w->attr.st_nlink)
		2001	w->attr.st_nlink = 1;
		2002	}
		2003
		2004	static void noinline
		2005	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2006	{
		2007	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2008
		2009	/* we copy this here each the time so that */
		2010	/* prev has the old value when the callback gets invoked */
		2011	w->prev = w->attr;
		2012	ev_stat_stat (EV_A_ w);
		2013
		2014	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2015	if (
		2016	w->prev.st_dev != w->attr.st_dev
		2017	|| w->prev.st_ino != w->attr.st_ino
		2018	|| w->prev.st_mode != w->attr.st_mode
		2019	|| w->prev.st_nlink != w->attr.st_nlink
		2020	|| w->prev.st_uid != w->attr.st_uid
		2021	|| w->prev.st_gid != w->attr.st_gid
		2022	|| w->prev.st_rdev != w->attr.st_rdev
		2023	|| w->prev.st_size != w->attr.st_size
		2024	|| w->prev.st_atime != w->attr.st_atime
		2025	|| w->prev.st_mtime != w->attr.st_mtime
		2026	|| w->prev.st_ctime != w->attr.st_ctime
		2027	) {
		2028	#if EV_USE_INOTIFY
		2029	infy_del (EV_A_ w);
		2030	infy_add (EV_A_ w);
		2031	ev_stat_stat (EV_A_ w); /* avoid race... */
		2032	#endif
		2033
		2034	ev_feed_event (EV_A_ w, EV_STAT);
		2035	}
		2036	}
		2037
		2038	void
		2039	ev_stat_start (EV_P_ ev_stat *w)
		2040	{
		2041	if (expect_false (ev_is_active (w)))
		2042	return;
		2043
		2044	/* since we use memcmp, we need to clear any padding data etc. */
		2045	memset (&w->prev, 0, sizeof (ev_statdata));
		2046	memset (&w->attr, 0, sizeof (ev_statdata));
		2047
		2048	ev_stat_stat (EV_A_ w);
		2049
		2050	if (w->interval < MIN_STAT_INTERVAL)
		2051	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2052
		2053	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2054	ev_set_priority (&w->timer, ev_priority (w));
		2055
		2056	#if EV_USE_INOTIFY
		2057	infy_init (EV_A);
		2058
		2059	if (fs_fd >= 0)
		2060	infy_add (EV_A_ w);
		2061	else
		2062	#endif
		2063	ev_timer_start (EV_A_ &w->timer);
		2064
		2065	ev_start (EV_A_ (W)w, 1);
		2066	}
		2067
		2068	void
		2069	ev_stat_stop (EV_P_ ev_stat *w)
		2070	{
		2071	clear_pending (EV_A_ (W)w);
		2072	if (expect_false (!ev_is_active (w)))
		2073	return;
		2074
		2075	#if EV_USE_INOTIFY
		2076	infy_del (EV_A_ w);
		2077	#endif
		2078	ev_timer_stop (EV_A_ &w->timer);
		2079
		2080	ev_stop (EV_A_ (W)w);
		2081	}
		2082	#endif
		2083
		2084	#if EV_IDLE_ENABLE
		2085	void
		2086	ev_idle_start (EV_P_ ev_idle *w)
		2087	{
		2088	if (expect_false (ev_is_active (w)))
		2089	return;
		2090
		2091	pri_adjust (EV_A_ (W)w);
		2092
		2093	{
		2094	int active = ++idlecnt [ABSPRI (w)];
		2095
		2096	++idleall;
		2097	ev_start (EV_A_ (W)w, active);
		2098
		2099	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2100	idles [ABSPRI (w)][active - 1] = w;
		2101	}
		2102	}
		2103
		2104	void
		2105	ev_idle_stop (EV_P_ ev_idle *w)
		2106	{
		2107	clear_pending (EV_A_ (W)w);
		2108	if (expect_false (!ev_is_active (w)))
		2109	return;
		2110
		2111	{
		2112	int active = ((W)w)->active;
		2113
		2114	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2115	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2116
		2117	ev_stop (EV_A_ (W)w);
		2118	--idleall;
		2119	}
		2120	}
		2121	#endif
		2122
		2123	void
		2124	ev_prepare_start (EV_P_ ev_prepare *w)
		2125	{
		2126	if (expect_false (ev_is_active (w)))
		2127	return;
		2128
		2129	ev_start (EV_A_ (W)w, ++preparecnt);
		2130	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2131	prepares [preparecnt - 1] = w;
		2132	}
		2133
		2134	void
		2135	ev_prepare_stop (EV_P_ ev_prepare *w)
		2136	{
		2137	clear_pending (EV_A_ (W)w);
		2138	if (expect_false (!ev_is_active (w)))
		2139	return;
		2140
		2141	{
		2142	int active = ((W)w)->active;
		2143	prepares [active - 1] = prepares [--preparecnt];
		2144	((W)prepares [active - 1])->active = active;
		2145	}
		2146
		2147	ev_stop (EV_A_ (W)w);
		2148	}
		2149
		2150	void
		2151	ev_check_start (EV_P_ ev_check *w)
		2152	{
		2153	if (expect_false (ev_is_active (w)))
		2154	return;
		2155
		2156	ev_start (EV_A_ (W)w, ++checkcnt);
		2157	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2158	checks [checkcnt - 1] = w;
		2159	}
		2160
		2161	void
		2162	ev_check_stop (EV_P_ ev_check *w)
		2163	{
		2164	clear_pending (EV_A_ (W)w);
		2165	if (expect_false (!ev_is_active (w)))
		2166	return;
		2167
		2168	{
		2169	int active = ((W)w)->active;
		2170	checks [active - 1] = checks [--checkcnt];
		2171	((W)checks [active - 1])->active = active;
		2172	}
		2173
		2174	ev_stop (EV_A_ (W)w);
		2175	}
		2176
		2177	#if EV_EMBED_ENABLE
		2178	void noinline
		2179	ev_embed_sweep (EV_P_ ev_embed *w)
		2180	{
		2181	ev_loop (w->loop, EVLOOP_NONBLOCK);
350	}	2182	}
351		2183
352	static void	2184	static void
353	ev_stop (struct ev_watcher *w)	2185	embed_cb (EV_P_ ev_io *io, int revents)
354	{	2186	{
355	if (w->pending)	2187	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
356	pendings [w->pending - 1].w = 0;
357		2188
358	w->active = 0;
359	/* nop */
360	}
361
362	void
363	evio_start (struct ev_io *w)
364	{
365	if (ev_is_active (w))	2189	if (ev_cb (w))
366	return;	2190	ev_feed_event (EV_A_ (W)w, EV_EMBED);
367
368	int fd = w->fd;
369
370	ev_start ((struct ev_watcher *)w, 1);
371	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
372	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
373
374	++fdchangecnt;
375	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
376	fdchanges [fdchangecnt - 1] = fd;
377	}
378
379	void
380	evio_stop (struct ev_io *w)
381	{
382	if (!ev_is_active (w))
383	return;
384
385	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
386	ev_stop ((struct ev_watcher *)w);
387
388	++fdchangecnt;
389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
390	fdchanges [fdchangecnt - 1] = w->fd;
391	}
392
393	void
394	evtimer_start (struct ev_timer *w)
395	{
396	if (ev_is_active (w))
397	return;
398
399	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D
400	if (w->is_abs)
401	{
402	/* this formula differs from the one in timer_reify becuse we do not round up */
403	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
405	}
406	else	2191	else
407	w->at += ev_now;	2192	ev_embed_sweep (loop, w);
408	fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D
409
410	ev_start ((struct ev_watcher *)w, ++timercnt);
411	array_needsize (timers, timermax, timercnt, );
412	timers [timercnt - 1] = w;
413	upheap (timercnt - 1);
414	}	2193	}
415		2194
416	void	2195	void
417	evtimer_stop (struct ev_timer *w)	2196	ev_embed_start (EV_P_ ev_embed *w)
418	{	2197	{
419	fprintf (stderr, "-topping %d, %d\n", w->active, timercnt);//D	2198	if (expect_false (ev_is_active (w)))
		2199	return;
		2200
		2201	{
		2202	struct ev_loop *loop = w->loop;
		2203	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2204	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2205	}
		2206
		2207	ev_set_priority (&w->io, ev_priority (w));
		2208	ev_io_start (EV_A_ &w->io);
		2209
		2210	ev_start (EV_A_ (W)w, 1);
		2211	}
		2212
		2213	void
		2214	ev_embed_stop (EV_P_ ev_embed *w)
		2215	{
		2216	clear_pending (EV_A_ (W)w);
420	if (!ev_is_active (w))	2217	if (expect_false (!ev_is_active (w)))
421	return;	2218	return;
422		2219
423	fprintf (stderr, "stopping %d, %d\n", w->active, timercnt);//D	2220	ev_io_stop (EV_A_ &w->io);
424	if (w->active < timercnt)
425	{
426	timers [w->active - 1] = timers [--timercnt];
427	downheap (w->active - 1);
428	}
429		2221
430	ev_stop ((struct ev_watcher *)w);	2222	ev_stop (EV_A_ (W)w);
431	}	2223	}
		2224	#endif
432		2225
		2226	#if EV_FORK_ENABLE
433	void	2227	void
434	evsignal_start (struct ev_signal *w)	2228	ev_fork_start (EV_P_ ev_fork *w)
435	{	2229	{
436	if (ev_is_active (w))	2230	if (expect_false (ev_is_active (w)))
437	return;	2231	return;
438		2232
439	ev_start ((struct ev_watcher *)w, 1);	2233	ev_start (EV_A_ (W)w, ++forkcnt);
440	array_needsize (signals, signalmax, w->signum, signals_init);	2234	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
441	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2235	forks [forkcnt - 1] = w;
442	}	2236	}
443		2237
444	void	2238	void
445	evsignal_stop (struct ev_signal *w)	2239	ev_fork_stop (EV_P_ ev_fork *w)
446	{	2240	{
		2241	clear_pending (EV_A_ (W)w);
447	if (!ev_is_active (w))	2242	if (expect_false (!ev_is_active (w)))
448	return;	2243	return;
449		2244
450	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2245	{
451	ev_stop ((struct ev_watcher *)w);	2246	int active = ((W)w)->active;
		2247	forks [active - 1] = forks [--forkcnt];
		2248	((W)forks [active - 1])->active = active;
		2249	}
		2250
		2251	ev_stop (EV_A_ (W)w);
452	}	2252	}
		2253	#endif
453		2254
454	/*****************************************************************************/	2255	/*****************************************************************************/
455	#if 1	2256
		2257	struct ev_once
		2258	{
		2259	ev_io io;
		2260	ev_timer to;
		2261	void (*cb)(int revents, void *arg);
		2262	void *arg;
		2263	};
456		2264
457	static void	2265	static void
458	sin_cb (struct ev_io *w, int revents)	2266	once_cb (EV_P_ struct ev_once *once, int revents)
459	{	2267	{
460	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2268	void (*cb)(int revents, void *arg) = once->cb;
		2269	void *arg = once->arg;
		2270
		2271	ev_io_stop (EV_A_ &once->io);
		2272	ev_timer_stop (EV_A_ &once->to);
		2273	ev_free (once);
		2274
		2275	cb (revents, arg);
461	}	2276	}
462		2277
463	static void	2278	static void
		2279	once_cb_io (EV_P_ ev_io *w, int revents)
		2280	{
		2281	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2282	}
		2283
		2284	static void
464	ocb (struct ev_timer *w, int revents)	2285	once_cb_to (EV_P_ ev_timer *w, int revents)
465	{	2286	{
466	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2287	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
467	}	2288	}
468		2289
469	int main (void)	2290	void
		2291	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
470	{	2292	{
471	struct ev_io sin;	2293	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
472		2294
473	ev_init (0);	2295	if (expect_false (!once))
474
475	evw_init (&sin, sin_cb, 55);
476	evio_set (&sin, 0, EV_READ);
477	evio_start (&sin);
478
479	struct ev_timer t[1000];
480
481	int i;
482	for (i = 0; i < 1000; ++i)
483	{
484	struct ev_timer *w = t + i;
485	evw_init (w, ocb, i);
486	evtimer_set_rel (w, drand48 (), 0);
487	evtimer_start (w);
488	if (drand48 () < 0.5)
489	evtimer_stop (w);
490	}	2296	{
491		2297	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
492	ev_loop (0);
493
494	return 0;	2298	return;
495	}	2299	}
496		2300
497	#endif	2301	once->cb = cb;
		2302	once->arg = arg;
498		2303
		2304	ev_init (&once->io, once_cb_io);
		2305	if (fd >= 0)
		2306	{
		2307	ev_io_set (&once->io, fd, events);
		2308	ev_io_start (EV_A_ &once->io);
		2309	}
499		2310
		2311	ev_init (&once->to, once_cb_to);
		2312	if (timeout >= 0.)
		2313	{
		2314	ev_timer_set (&once->to, timeout, 0.);
		2315	ev_timer_start (EV_A_ &once->to);
		2316	}
		2317	}
500		2318
		2319	#ifdef __cplusplus
		2320	}
		2321	#endif
501		2322

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