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Comparing libev/ev.c (file contents):
Revision 1.1 by root, Tue Oct 30 20:59:31 2007 UTC vs.
Revision 1.177 by root, Tue Dec 11 15:06:50 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; \	443	int ocur_ = (cur); \
72	do \	444	(base) = (type *)array_realloc \
		445	(sizeof (type), (base), &(cur), (cnt)); \
		446	init ((base) + (ocur_), (cur) - ocur_); \
		447	}
		448
		449	#if 0
		450	#define array_slim(type,stem) \
		451	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
73	{ \	452	{ \
74	newcnt += (newcnt >> 1) + 16; \	453	stem ## max = array_roundsize (stem ## cnt >> 1); \
75	} \	454	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
76	while ((cnt) > newcnt); \	455	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
77	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	456	}
78	base = realloc (base, sizeof (*base) * (newcnt)); \	457	#endif
79	init (base + cur, newcnt - cur); \	458
80	cur = newcnt; \	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_size
		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	int events = 0;
		539
		540	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		541	events |= 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	anfd->reify = 0;
		553
		554	backend_modify (EV_A_ fd, anfd->events, events);
		555	anfd->events = events;
		556	}
		557
		558	fdchangecnt = 0;
		559	}
		560
		561	void inline_size
		562	fd_change (EV_P_ int fd)
		563	{
		564	if (expect_false (anfds [fd].reify))
		565	return;
		566
		567	anfds [fd].reify = 1;
		568
		569	++fdchangecnt;
		570	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		571	fdchanges [fdchangecnt - 1] = fd;
		572	}
		573
		574	void inline_speed
		575	fd_kill (EV_P_ int fd)
		576	{
		577	ev_io *w;
		578
		579	while ((w = (ev_io *)anfds [fd].head))
		580	{
		581	ev_io_stop (EV_A_ w);
		582	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		583	}
		584	}
		585
		586	int inline_size
		587	fd_valid (int fd)
		588	{
		589	#ifdef _WIN32
		590	return _get_osfhandle (fd) != -1;
		591	#else
		592	return fcntl (fd, F_GETFD) != -1;
		593	#endif
		594	}
		595
		596	/* called on EBADF to verify fds */
		597	static void noinline
		598	fd_ebadf (EV_P)
		599	{
		600	int fd;
		601
		602	for (fd = 0; fd < anfdmax; ++fd)
		603	if (anfds [fd].events)
		604	if (!fd_valid (fd) == -1 && errno == EBADF)
		605	fd_kill (EV_A_ fd);
		606	}
		607
		608	/* called on ENOMEM in select/poll to kill some fds and retry */
		609	static void noinline
		610	fd_enomem (EV_P)
		611	{
		612	int fd;
		613
		614	for (fd = anfdmax; fd--; )
		615	if (anfds [fd].events)
		616	{
		617	fd_kill (EV_A_ fd);
		618	return;
81	}	619	}
		620	}
		621
		622	/* usually called after fork if backend needs to re-arm all fds from scratch */
		623	static void noinline
		624	fd_rearm_all (EV_P)
		625	{
		626	int fd;
		627
		628	for (fd = 0; fd < anfdmax; ++fd)
		629	if (anfds [fd].events)
		630	{
		631	anfds [fd].events = 0;
		632	fd_change (EV_A_ fd);
		633	}
		634	}
		635
		636	/*****************************************************************************/
		637
		638	void inline_speed
		639	upheap (WT *heap, int k)
		640	{
		641	WT w = heap [k];
		642
		643	while (k && heap [k >> 1]->at > w->at)
		644	{
		645	heap [k] = heap [k >> 1];
		646	((W)heap [k])->active = k + 1;
		647	k >>= 1;
		648	}
		649
		650	heap [k] = w;
		651	((W)heap [k])->active = k + 1;
		652
		653	}
		654
		655	void inline_speed
		656	downheap (WT *heap, int N, int k)
		657	{
		658	WT w = heap [k];
		659
		660	while (k < (N >> 1))
		661	{
		662	int j = k << 1;
		663
		664	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		665	++j;
		666
		667	if (w->at <= heap [j]->at)
		668	break;
		669
		670	heap [k] = heap [j];
		671	((W)heap [k])->active = k + 1;
		672	k = j;
		673	}
		674
		675	heap [k] = w;
		676	((W)heap [k])->active = k + 1;
		677	}
		678
		679	void inline_size
		680	adjustheap (WT *heap, int N, int k)
		681	{
		682	upheap (heap, k);
		683	downheap (heap, N, k);
		684	}
		685
		686	/*****************************************************************************/
82		687
83	typedef struct	688	typedef struct
84	{	689	{
85	struct ev_io *head;	690	WL head;
86	unsigned char wev, rev; /* want, received event set */	691	sig_atomic_t volatile gotsig;
87	} ANFD;	692	} ANSIG;
88		693
89	static ANFD *anfds;	694	static ANSIG *signals;
90	static int anfdmax;	695	static int signalmax;
91		696
92	static int *fdchanges;	697	static int sigpipe [2];
93	static int fdchangemax, fdchangecnt;	698	static sig_atomic_t volatile gotsig;
		699	static ev_io sigev;
		700
		701	void inline_size
		702	signals_init (ANSIG *base, int count)
		703	{
		704	while (count--)
		705	{
		706	base->head = 0;
		707	base->gotsig = 0;
		708
		709	++base;
		710	}
		711	}
94		712
95	static void	713	static void
96	anfds_init (ANFD *base, int count)	714	sighandler (int signum)
97	{	715	{
98	while (count--)	716	#if _WIN32
99	{	717	signal (signum, sighandler);
100	base->head = 0;	718	#endif
101	base->wev = base->rev = EV_NONE;	719
102	++base;	720	signals [signum - 1].gotsig = 1;
		721
		722	if (!gotsig)
103	}	723	{
		724	int old_errno = errno;
		725	gotsig = 1;
		726	write (sigpipe [1], &signum, 1);
		727	errno = old_errno;
		728	}
104	}	729	}
105		730
106	typedef struct	731	void noinline
		732	ev_feed_signal_event (EV_P_ int signum)
107	{	733	{
108	struct ev_watcher *w;	734	WL w;
109	int events;
110	} ANPENDING;
111		735
112	static ANPENDING *pendings;	736	#if EV_MULTIPLICITY
113	static int pendingmax, pendingcnt;	737	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		738	#endif
		739
		740	--signum;
		741
		742	if (signum < 0 || signum >= signalmax)
		743	return;
		744
		745	signals [signum].gotsig = 0;
		746
		747	for (w = signals [signum].head; w; w = w->next)
		748	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		749	}
114		750
115	static void	751	static void
116	event (struct ev_watcher *w, int events)	752	sigcb (EV_P_ ev_io *iow, int revents)
117	{	753	{
118	w->pending = ++pendingcnt;	754	int signum;
119	array_needsize (pendings, pendingmax, pendingcnt, );	755
120	pendings [pendingcnt - 1].w = w;	756	read (sigpipe [0], &revents, 1);
121	pendings [pendingcnt - 1].events = events;	757	gotsig = 0;
		758
		759	for (signum = signalmax; signum--; )
		760	if (signals [signum].gotsig)
		761	ev_feed_signal_event (EV_A_ signum + 1);
122	}	762	}
		763
		764	void inline_speed
		765	fd_intern (int fd)
		766	{
		767	#ifdef _WIN32
		768	int arg = 1;
		769	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		770	#else
		771	fcntl (fd, F_SETFD, FD_CLOEXEC);
		772	fcntl (fd, F_SETFL, O_NONBLOCK);
		773	#endif
		774	}
		775
		776	static void noinline
		777	siginit (EV_P)
		778	{
		779	fd_intern (sigpipe [0]);
		780	fd_intern (sigpipe [1]);
		781
		782	ev_io_set (&sigev, sigpipe [0], EV_READ);
		783	ev_io_start (EV_A_ &sigev);
		784	ev_unref (EV_A); /* child watcher should not keep loop alive */
		785	}
		786
		787	/*****************************************************************************/
		788
		789	static ev_child *childs [EV_PID_HASHSIZE];
		790
		791	#ifndef _WIN32
		792
		793	static ev_signal childev;
		794
		795	void inline_speed
		796	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		797	{
		798	ev_child *w;
		799
		800	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		801	if (w->pid == pid || !w->pid)
		802	{
		803	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		804	w->rpid = pid;
		805	w->rstatus = status;
		806	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		807	}
		808	}
		809
		810	#ifndef WCONTINUED
		811	# define WCONTINUED 0
		812	#endif
123		813
124	static void	814	static void
125	fd_event (int fd, int events)	815	childcb (EV_P_ ev_signal *sw, int revents)
126	{	816	{
127	ANFD *anfd = anfds + fd;	817	int pid, status;
128	struct ev_io *w;
129		818
130	for (w = anfd->head; w; w = w->next)	819	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
131	{	820	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
132	int ev = w->events & events;	821	if (!WCONTINUED
		822	|| errno != EINVAL
		823	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		824	return;
133		825
134	if (ev)	826	/* make sure we are called again until all childs have been reaped */
135	event ((struct ev_watcher *)w, ev);	827	/* we need to do it this way so that the callback gets called before we continue */
136	}	828	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
137	}
138		829
139	static struct ev_timer **timers;	830	child_reap (EV_A_ sw, pid, pid, status);
140	static int timermax, timercnt;	831	if (EV_PID_HASHSIZE > 1)
141		832	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
142	static void
143	upheap (int k)
144	{
145	struct ev_timer *w = timers [k];
146
147	while (k && timers [k >> 1]->at > w->at)
148	{
149	timers [k] = timers [k >> 1];
150	timers [k]->active = k + 1;
151	k >>= 1;
152	}
153
154	timers [k] = w;
155	timers [k]->active = k + 1;
156
157	}	833	}
158		834
159	static void	835	#endif
160	downheap (int k)
161	{
162	struct ev_timer *w = timers [k];
163		836
164	while (k <= (timercnt >> 1))	837	/*****************************************************************************/
165	{
166	int j = k << 1;
167		838
168	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	839	#if EV_USE_PORT
169	++j;	840	# include "ev_port.c"
170		841	#endif
171	if (w->at <= timers [j]->at)	842	#if EV_USE_KQUEUE
172	break;	843	# include "ev_kqueue.c"
173		844	#endif
174	timers [k] = timers [j];
175	timers [k]->active = k;
176	k = j;
177	}
178
179	timers [k] = w;
180	timers [k]->active = k + 1;
181	}
182
183	static struct ev_signal **signals;
184	static int signalmax, signalcnt;
185
186	static void
187	signals_init (struct ev_signal **base, int count)
188	{
189	while (count--)
190	*base++ = 0;
191	}
192
193	#if HAVE_EPOLL	845	#if EV_USE_EPOLL
194	# include "ev_epoll.c"	846	# include "ev_epoll.c"
195	#endif	847	#endif
		848	#if EV_USE_POLL
		849	# include "ev_poll.c"
		850	#endif
196	#if HAVE_SELECT	851	#if EV_USE_SELECT
197	# include "ev_select.c"	852	# include "ev_select.c"
198	#endif	853	#endif
199		854
200	int ev_init (int flags)	855	int
		856	ev_version_major (void)
201	{	857	{
		858	return EV_VERSION_MAJOR;
		859	}
		860
		861	int
		862	ev_version_minor (void)
		863	{
		864	return EV_VERSION_MINOR;
		865	}
		866
		867	/* return true if we are running with elevated privileges and should ignore env variables */
		868	int inline_size
		869	enable_secure (void)
		870	{
		871	#ifdef _WIN32
		872	return 0;
		873	#else
		874	return getuid () != geteuid ()
		875	|| getgid () != getegid ();
		876	#endif
		877	}
		878
		879	unsigned int
		880	ev_supported_backends (void)
		881	{
		882	unsigned int flags = 0;
		883
		884	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		885	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		886	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		887	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		888	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		889
		890	return flags;
		891	}
		892
		893	unsigned int
		894	ev_recommended_backends (void)
		895	{
		896	unsigned int flags = ev_supported_backends ();
		897
		898	#ifndef __NetBSD__
		899	/* kqueue is borked on everything but netbsd apparently */
		900	/* it usually doesn't work correctly on anything but sockets and pipes */
		901	flags &= ~EVBACKEND_KQUEUE;
		902	#endif
		903	#ifdef __APPLE__
		904	// flags &= ~EVBACKEND_KQUEUE; for documentation
		905	flags &= ~EVBACKEND_POLL;
		906	#endif
		907
		908	return flags;
		909	}
		910
		911	unsigned int
		912	ev_embeddable_backends (void)
		913	{
		914	return EVBACKEND_EPOLL
		915	| EVBACKEND_KQUEUE
		916	| EVBACKEND_PORT;
		917	}
		918
		919	unsigned int
		920	ev_backend (EV_P)
		921	{
		922	return backend;
		923	}
		924
		925	unsigned int
		926	ev_loop_count (EV_P)
		927	{
		928	return loop_count;
		929	}
		930
		931	static void noinline
		932	loop_init (EV_P_ unsigned int flags)
		933	{
		934	if (!backend)
		935	{
202	#if HAVE_MONOTONIC	936	#if EV_USE_MONOTONIC
203	{	937	{
204	struct timespec ts;	938	struct timespec ts;
205	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	939	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
206	have_monotonic = 1;	940	have_monotonic = 1;
207	}	941	}
208	#endif	942	#endif
209		943
210	ev_now = ev_time ();	944	ev_rt_now = ev_time ();
		945	mn_now = get_clock ();
		946	now_floor = mn_now;
		947	rtmn_diff = ev_rt_now - mn_now;
211		948
		949	/* pid check not overridable via env */
		950	#ifndef _WIN32
		951	if (flags & EVFLAG_FORKCHECK)
		952	curpid = getpid ();
		953	#endif
		954
		955	if (!(flags & EVFLAG_NOENV)
		956	&& !enable_secure ()
		957	&& getenv ("LIBEV_FLAGS"))
		958	flags = atoi (getenv ("LIBEV_FLAGS"));
		959
		960	if (!(flags & 0x0000ffffUL))
		961	flags |= ev_recommended_backends ();
		962
		963	backend = 0;
		964	backend_fd = -1;
		965	#if EV_USE_INOTIFY
		966	fs_fd = -2;
		967	#endif
		968
		969	#if EV_USE_PORT
		970	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		971	#endif
		972	#if EV_USE_KQUEUE
		973	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		974	#endif
212	#if HAVE_EPOLL	975	#if EV_USE_EPOLL
213	if (epoll_init (flags))	976	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
214	return ev_method;
215	#endif	977	#endif
		978	#if EV_USE_POLL
		979	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		980	#endif
216	#if HAVE_SELECT	981	#if EV_USE_SELECT
217	if (select_init (flags))	982	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
218	return ev_method;
219	#endif	983	#endif
220		984
221	ev_method = EVMETHOD_NONE;	985	ev_init (&sigev, sigcb);
222	return ev_method;	986	ev_set_priority (&sigev, EV_MAXPRI);
		987	}
223	}	988	}
224		989
225	void ev_prefork (void)	990	static void noinline
226	{	991	loop_destroy (EV_P)
227	}
228
229	void ev_postfork_parent (void)
230	{
231	}
232
233	void ev_postfork_child (void)
234	{
235	#if HAVE_EPOLL
236	epoll_postfork_child ();
237	#endif
238	}
239
240	static void
241	call_pending ()
242	{	992	{
243	int i;	993	int i;
244		994
245	for (i = 0; i < pendingcnt; ++i)	995	#if EV_USE_INOTIFY
		996	if (fs_fd >= 0)
		997	close (fs_fd);
		998	#endif
		999
		1000	if (backend_fd >= 0)
		1001	close (backend_fd);
		1002
		1003	#if EV_USE_PORT
		1004	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1005	#endif
		1006	#if EV_USE_KQUEUE
		1007	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1008	#endif
		1009	#if EV_USE_EPOLL
		1010	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1011	#endif
		1012	#if EV_USE_POLL
		1013	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1014	#endif
		1015	#if EV_USE_SELECT
		1016	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1017	#endif
		1018
		1019	for (i = NUMPRI; i--; )
		1020	{
		1021	array_free (pending, [i]);
		1022	#if EV_IDLE_ENABLE
		1023	array_free (idle, [i]);
		1024	#endif
246	{	1025	}
247	ANPENDING *p = pendings + i;
248		1026
249	if (p->w)	1027	/* have to use the microsoft-never-gets-it-right macro */
		1028	array_free (fdchange, EMPTY);
		1029	array_free (timer, EMPTY);
		1030	#if EV_PERIODIC_ENABLE
		1031	array_free (periodic, EMPTY);
		1032	#endif
		1033	array_free (prepare, EMPTY);
		1034	array_free (check, EMPTY);
		1035
		1036	backend = 0;
		1037	}
		1038
		1039	void inline_size infy_fork (EV_P);
		1040
		1041	void inline_size
		1042	loop_fork (EV_P)
		1043	{
		1044	#if EV_USE_PORT
		1045	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1046	#endif
		1047	#if EV_USE_KQUEUE
		1048	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1049	#endif
		1050	#if EV_USE_EPOLL
		1051	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1052	#endif
		1053	#if EV_USE_INOTIFY
		1054	infy_fork (EV_A);
		1055	#endif
		1056
		1057	if (ev_is_active (&sigev))
		1058	{
		1059	/* default loop */
		1060
		1061	ev_ref (EV_A);
		1062	ev_io_stop (EV_A_ &sigev);
		1063	close (sigpipe [0]);
		1064	close (sigpipe [1]);
		1065
		1066	while (pipe (sigpipe))
		1067	syserr ("(libev) error creating pipe");
		1068
		1069	siginit (EV_A);
		1070	}
		1071
		1072	postfork = 0;
		1073	}
		1074
		1075	#if EV_MULTIPLICITY
		1076	struct ev_loop *
		1077	ev_loop_new (unsigned int flags)
		1078	{
		1079	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1080
		1081	memset (loop, 0, sizeof (struct ev_loop));
		1082
		1083	loop_init (EV_A_ flags);
		1084
		1085	if (ev_backend (EV_A))
		1086	return loop;
		1087
		1088	return 0;
		1089	}
		1090
		1091	void
		1092	ev_loop_destroy (EV_P)
		1093	{
		1094	loop_destroy (EV_A);
		1095	ev_free (loop);
		1096	}
		1097
		1098	void
		1099	ev_loop_fork (EV_P)
		1100	{
		1101	postfork = 1;
		1102	}
		1103
		1104	#endif
		1105
		1106	#if EV_MULTIPLICITY
		1107	struct ev_loop *
		1108	ev_default_loop_init (unsigned int flags)
		1109	#else
		1110	int
		1111	ev_default_loop (unsigned int flags)
		1112	#endif
		1113	{
		1114	if (sigpipe [0] == sigpipe [1])
		1115	if (pipe (sigpipe))
		1116	return 0;
		1117
		1118	if (!ev_default_loop_ptr)
		1119	{
		1120	#if EV_MULTIPLICITY
		1121	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1122	#else
		1123	ev_default_loop_ptr = 1;
		1124	#endif
		1125
		1126	loop_init (EV_A_ flags);
		1127
		1128	if (ev_backend (EV_A))
250	{	1129	{
251	p->w->pending = 0;	1130	siginit (EV_A);
252	p->w->cb (p->w, p->events);	1131
		1132	#ifndef _WIN32
		1133	ev_signal_init (&childev, childcb, SIGCHLD);
		1134	ev_set_priority (&childev, EV_MAXPRI);
		1135	ev_signal_start (EV_A_ &childev);
		1136	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1137	#endif
253	}	1138	}
		1139	else
		1140	ev_default_loop_ptr = 0;
		1141	}
		1142
		1143	return ev_default_loop_ptr;
		1144	}
		1145
		1146	void
		1147	ev_default_destroy (void)
		1148	{
		1149	#if EV_MULTIPLICITY
		1150	struct ev_loop *loop = ev_default_loop_ptr;
		1151	#endif
		1152
		1153	#ifndef _WIN32
		1154	ev_ref (EV_A); /* child watcher */
		1155	ev_signal_stop (EV_A_ &childev);
		1156	#endif
		1157
		1158	ev_ref (EV_A); /* signal watcher */
		1159	ev_io_stop (EV_A_ &sigev);
		1160
		1161	close (sigpipe [0]); sigpipe [0] = 0;
		1162	close (sigpipe [1]); sigpipe [1] = 0;
		1163
		1164	loop_destroy (EV_A);
		1165	}
		1166
		1167	void
		1168	ev_default_fork (void)
		1169	{
		1170	#if EV_MULTIPLICITY
		1171	struct ev_loop *loop = ev_default_loop_ptr;
		1172	#endif
		1173
		1174	if (backend)
		1175	postfork = 1;
		1176	}
		1177
		1178	/*****************************************************************************/
		1179
		1180	void
		1181	ev_invoke (EV_P_ void *w, int revents)
		1182	{
		1183	EV_CB_INVOKE ((W)w, revents);
		1184	}
		1185
		1186	void inline_speed
		1187	call_pending (EV_P)
		1188	{
		1189	int pri;
		1190
		1191	for (pri = NUMPRI; pri--; )
		1192	while (pendingcnt [pri])
		1193	{
		1194	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1195
		1196	if (expect_true (p->w))
		1197	{
		1198	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1199
		1200	p->w->pending = 0;
		1201	EV_CB_INVOKE (p->w, p->events);
		1202	}
254	}	1203	}
255
256	pendingcnt = 0;
257	}	1204	}
258		1205
259	static void	1206	void inline_size
260	timer_reify (void)	1207	timers_reify (EV_P)
261	{	1208	{
262	while (timercnt && timers [0]->at <= ev_now)	1209	while (timercnt && ((WT)timers [0])->at <= mn_now)
263	{	1210	{
264	struct ev_timer *w = timers [0];	1211	ev_timer *w = timers [0];
265		1212
		1213	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1214
266	/* first reschedule timer */	1215	/* first reschedule or stop timer */
267	if (w->repeat)	1216	if (w->repeat)
268	{	1217	{
269	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	1218	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
270	if (w->is_abs)	1219
271	w->at += floor ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
272	else
273	w->at = ev_now + w->repeat;	1220	((WT)w)->at += w->repeat;
		1221	if (((WT)w)->at < mn_now)
		1222	((WT)w)->at = mn_now;
274		1223
275	fprintf (stderr, "b %f\n", w->at);//D	1224	downheap ((WT *)timers, timercnt, 0);
276
277	downheap (0);
278	}	1225	}
279	else	1226	else
280	evtimer_stop (w); /* nonrepeating: stop timer */	1227	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
281		1228
282	event ((struct ev_watcher *)w, EV_TIMEOUT);	1229	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1230	}
		1231	}
		1232
		1233	#if EV_PERIODIC_ENABLE
		1234	void inline_size
		1235	periodics_reify (EV_P)
		1236	{
		1237	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
283	}	1238	{
284	}	1239	ev_periodic *w = periodics [0];
285		1240
286	int ev_loop_done;	1241	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
287		1242
		1243	/* first reschedule or stop timer */
		1244	if (w->reschedule_cb)
		1245	{
		1246	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1247	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1248	downheap ((WT *)periodics, periodiccnt, 0);
		1249	}
		1250	else if (w->interval)
		1251	{
		1252	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1253	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1254	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1255	downheap ((WT *)periodics, periodiccnt, 0);
		1256	}
		1257	else
		1258	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1259
		1260	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1261	}
		1262	}
		1263
		1264	static void noinline
		1265	periodics_reschedule (EV_P)
		1266	{
		1267	int i;
		1268
		1269	/* adjust periodics after time jump */
		1270	for (i = 0; i < periodiccnt; ++i)
		1271	{
		1272	ev_periodic *w = periodics [i];
		1273
		1274	if (w->reschedule_cb)
		1275	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1276	else if (w->interval)
		1277	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1278	}
		1279
		1280	/* now rebuild the heap */
		1281	for (i = periodiccnt >> 1; i--; )
		1282	downheap ((WT *)periodics, periodiccnt, i);
		1283	}
		1284	#endif
		1285
		1286	#if EV_IDLE_ENABLE
		1287	void inline_size
		1288	idle_reify (EV_P)
		1289	{
		1290	if (expect_false (idleall))
		1291	{
		1292	int pri;
		1293
		1294	for (pri = NUMPRI; pri--; )
		1295	{
		1296	if (pendingcnt [pri])
		1297	break;
		1298
		1299	if (idlecnt [pri])
		1300	{
		1301	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1302	break;
		1303	}
		1304	}
		1305	}
		1306	}
		1307	#endif
		1308
		1309	int inline_size
		1310	time_update_monotonic (EV_P)
		1311	{
		1312	mn_now = get_clock ();
		1313
		1314	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1315	{
		1316	ev_rt_now = rtmn_diff + mn_now;
		1317	return 0;
		1318	}
		1319	else
		1320	{
		1321	now_floor = mn_now;
		1322	ev_rt_now = ev_time ();
		1323	return 1;
		1324	}
		1325	}
		1326
		1327	void inline_size
		1328	time_update (EV_P)
		1329	{
		1330	int i;
		1331
		1332	#if EV_USE_MONOTONIC
		1333	if (expect_true (have_monotonic))
		1334	{
		1335	if (time_update_monotonic (EV_A))
		1336	{
		1337	ev_tstamp odiff = rtmn_diff;
		1338
		1339	/* loop a few times, before making important decisions.
		1340	* on the choice of "4": one iteration isn't enough,
		1341	* in case we get preempted during the calls to
		1342	* ev_time and get_clock. a second call is almost guaranteed
		1343	* to succeed in that case, though. and looping a few more times
		1344	* doesn't hurt either as we only do this on time-jumps or
		1345	* in the unlikely event of having been preempted here.
		1346	*/
		1347	for (i = 4; --i; )
		1348	{
		1349	rtmn_diff = ev_rt_now - mn_now;
		1350
		1351	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1352	return; /* all is well */
		1353
		1354	ev_rt_now = ev_time ();
		1355	mn_now = get_clock ();
		1356	now_floor = mn_now;
		1357	}
		1358
		1359	# if EV_PERIODIC_ENABLE
		1360	periodics_reschedule (EV_A);
		1361	# endif
		1362	/* no timer adjustment, as the monotonic clock doesn't jump */
		1363	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1364	}
		1365	}
		1366	else
		1367	#endif
		1368	{
		1369	ev_rt_now = ev_time ();
		1370
		1371	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		1372	{
		1373	#if EV_PERIODIC_ENABLE
		1374	periodics_reschedule (EV_A);
		1375	#endif
		1376	/* adjust timers. this is easy, as the offset is the same for all of them */
		1377	for (i = 0; i < timercnt; ++i)
		1378	((WT)timers [i])->at += ev_rt_now - mn_now;
		1379	}
		1380
		1381	mn_now = ev_rt_now;
		1382	}
		1383	}
		1384
		1385	void
		1386	ev_ref (EV_P)
		1387	{
		1388	++activecnt;
		1389	}
		1390
		1391	void
		1392	ev_unref (EV_P)
		1393	{
		1394	--activecnt;
		1395	}
		1396
		1397	static int loop_done;
		1398
		1399	void
288	int ev_loop (int flags)	1400	ev_loop (EV_P_ int flags)
289	{	1401	{
290	double block;
291	ev_loop_done = flags & EVLOOP_ONESHOT;	1402	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1403	? EVUNLOOP_ONE
		1404	: EVUNLOOP_CANCEL;
		1405
		1406	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
292		1407
293	do	1408	do
294	{	1409	{
		1410	#ifndef _WIN32
		1411	if (expect_false (curpid)) /* penalise the forking check even more */
		1412	if (expect_false (getpid () != curpid))
		1413	{
		1414	curpid = getpid ();
		1415	postfork = 1;
		1416	}
		1417	#endif
		1418
		1419	#if EV_FORK_ENABLE
		1420	/* we might have forked, so queue fork handlers */
		1421	if (expect_false (postfork))
		1422	if (forkcnt)
		1423	{
		1424	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1425	call_pending (EV_A);
		1426	}
		1427	#endif
		1428
		1429	/* queue prepare watchers (and execute them) */
		1430	if (expect_false (preparecnt))
		1431	{
		1432	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1433	call_pending (EV_A);
		1434	}
		1435
		1436	if (expect_false (!activecnt))
		1437	break;
		1438
		1439	/* we might have forked, so reify kernel state if necessary */
		1440	if (expect_false (postfork))
		1441	loop_fork (EV_A);
		1442
295	/* update fd-related kernel structures */	1443	/* update fd-related kernel structures */
296	method_reify (); fdchangecnt = 0;	1444	fd_reify (EV_A);
297		1445
298	/* calculate blocking time */	1446	/* calculate blocking time */
		1447	{
		1448	ev_tstamp block;
		1449
		1450	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
		1451	block = 0.; /* do not block at all */
		1452	else
		1453	{
		1454	/* update time to cancel out callback processing overhead */
		1455	#if EV_USE_MONOTONIC
		1456	if (expect_true (have_monotonic))
		1457	time_update_monotonic (EV_A);
		1458	else
		1459	#endif
		1460	{
299	ev_now = ev_time ();	1461	ev_rt_now = ev_time ();
		1462	mn_now = ev_rt_now;
		1463	}
300		1464
301	if (flags & EVLOOP_NONBLOCK)
302	block = 0.;
303	else if (!timercnt)
304	block = MAX_BLOCKTIME;	1465	block = MAX_BLOCKTIME;
305	else	1466
		1467	if (timercnt)
306	{	1468	{
307	block = timers [0]->at - ev_now + method_fudge;	1469	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
		1470	if (block > to) block = to;
		1471	}
		1472
		1473	#if EV_PERIODIC_ENABLE
		1474	if (periodiccnt)
		1475	{
		1476	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
		1477	if (block > to) block = to;
		1478	}
		1479	#endif
		1480
308	if (block < 0.) block = 0.;	1481	if (expect_false (block < 0.)) block = 0.;
309	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
310	}	1482	}
311		1483
312	fprintf (stderr, "block %f\n", block);//D	1484	++loop_count;
313	method_poll (block);	1485	backend_poll (EV_A_ block);
		1486	}
314		1487
		1488	/* update ev_rt_now, do magic */
		1489	time_update (EV_A);
		1490
315	/* put pending timers into pendign queue and reschedule them */	1491	/* queue pending timers and reschedule them */
		1492	timers_reify (EV_A); /* relative timers called last */
		1493	#if EV_PERIODIC_ENABLE
		1494	periodics_reify (EV_A); /* absolute timers called first */
		1495	#endif
		1496
		1497	#if EV_IDLE_ENABLE
		1498	/* queue idle watchers unless other events are pending */
316	timer_reify ();	1499	idle_reify (EV_A);
		1500	#endif
317		1501
318	ev_now = ev_time ();	1502	/* queue check watchers, to be executed first */
		1503	if (expect_false (checkcnt))
		1504	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1505
319	call_pending ();	1506	call_pending (EV_A);
320	}
321	while (!ev_loop_done);
322	}
323		1507
324	static void	1508	}
325	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1509	while (expect_true (activecnt && !loop_done));
		1510
		1511	if (loop_done == EVUNLOOP_ONE)
		1512	loop_done = EVUNLOOP_CANCEL;
		1513	}
		1514
		1515	void
		1516	ev_unloop (EV_P_ int how)
		1517	{
		1518	loop_done = how;
		1519	}
		1520
		1521	/*****************************************************************************/
		1522
		1523	void inline_size
		1524	wlist_add (WL *head, WL elem)
326	{	1525	{
327	elem->next = *head;	1526	elem->next = *head;
328	*head = elem;	1527	*head = elem;
329	}	1528	}
330		1529
331	static void	1530	void inline_size
332	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1531	wlist_del (WL *head, WL elem)
333	{	1532	{
334	while (*head)	1533	while (*head)
335	{	1534	{
336	if (*head == elem)	1535	if (*head == elem)
337	{	1536	{
…		…
341		1540
342	head = &(*head)->next;	1541	head = &(*head)->next;
343	}	1542	}
344	}	1543	}
345		1544
		1545	void inline_speed
		1546	clear_pending (EV_P_ W w)
		1547	{
		1548	if (w->pending)
		1549	{
		1550	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1551	w->pending = 0;
		1552	}
		1553	}
		1554
		1555	int
		1556	ev_clear_pending (EV_P_ void *w)
		1557	{
		1558	W w_ = (W)w;
		1559	int pending = w_->pending;
		1560
		1561	if (expect_true (pending))
		1562	{
		1563	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1564	w_->pending = 0;
		1565	p->w = 0;
		1566	return p->events;
		1567	}
		1568	else
		1569	return 0;
		1570	}
		1571
		1572	void inline_size
		1573	pri_adjust (EV_P_ W w)
		1574	{
		1575	int pri = w->priority;
		1576	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1577	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1578	w->priority = pri;
		1579	}
		1580
		1581	void inline_speed
		1582	ev_start (EV_P_ W w, int active)
		1583	{
		1584	pri_adjust (EV_A_ w);
		1585	w->active = active;
		1586	ev_ref (EV_A);
		1587	}
		1588
		1589	void inline_size
		1590	ev_stop (EV_P_ W w)
		1591	{
		1592	ev_unref (EV_A);
		1593	w->active = 0;
		1594	}
		1595
		1596	/*****************************************************************************/
		1597
		1598	void noinline
		1599	ev_io_start (EV_P_ ev_io *w)
		1600	{
		1601	int fd = w->fd;
		1602
		1603	if (expect_false (ev_is_active (w)))
		1604	return;
		1605
		1606	assert (("ev_io_start called with negative fd", fd >= 0));
		1607
		1608	ev_start (EV_A_ (W)w, 1);
		1609	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1610	wlist_add ((WL *)&anfds[fd].head, (WL)w);
		1611
		1612	fd_change (EV_A_ fd);
		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 ((WL *)&anfds[w->fd].head, (WL)w);
		1625	ev_stop (EV_A_ (W)w);
		1626
		1627	fd_change (EV_A_ w->fd);
		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 (ev_timer *, timers, timermax, timercnt, EMPTY2);
		1642	timers [timercnt - 1] = w;
		1643	upheap ((WT *)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] == w));
		1656
		1657	{
		1658	int active = ((W)w)->active;
		1659
		1660	if (expect_true (--active < --timercnt))
		1661	{
		1662	timers [active] = timers [timercnt];
		1663	adjustheap ((WT *)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 ((WT *)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 (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
		1712	periodics [periodiccnt - 1] = w;
		1713	upheap ((WT *)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] == w));
		1726
		1727	{
		1728	int active = ((W)w)->active;
		1729
		1730	if (expect_true (--active < --periodiccnt))
		1731	{
		1732	periodics [active] = periodics [periodiccnt];
		1733	adjustheap ((WT *)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	ev_start (EV_A_ (W)w, 1);
		1765	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1766	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1767
		1768	if (!((WL)w)->next)
		1769	{
		1770	#if _WIN32
		1771	signal (w->signum, sighandler);
		1772	#else
		1773	struct sigaction sa;
		1774	sa.sa_handler = sighandler;
		1775	sigfillset (&sa.sa_mask);
		1776	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1777	sigaction (w->signum, &sa, 0);
		1778	#endif
		1779	}
		1780	}
		1781
		1782	void noinline
		1783	ev_signal_stop (EV_P_ ev_signal *w)
		1784	{
		1785	clear_pending (EV_A_ (W)w);
		1786	if (expect_false (!ev_is_active (w)))
		1787	return;
		1788
		1789	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1790	ev_stop (EV_A_ (W)w);
		1791
		1792	if (!signals [w->signum - 1].head)
		1793	signal (w->signum, SIG_DFL);
		1794	}
		1795
		1796	void
		1797	ev_child_start (EV_P_ ev_child *w)
		1798	{
		1799	#if EV_MULTIPLICITY
		1800	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1801	#endif
		1802	if (expect_false (ev_is_active (w)))
		1803	return;
		1804
		1805	ev_start (EV_A_ (W)w, 1);
		1806	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1807	}
		1808
		1809	void
		1810	ev_child_stop (EV_P_ ev_child *w)
		1811	{
		1812	clear_pending (EV_A_ (W)w);
		1813	if (expect_false (!ev_is_active (w)))
		1814	return;
		1815
		1816	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1817	ev_stop (EV_A_ (W)w);
		1818	}
		1819
		1820	#if EV_STAT_ENABLE
		1821
		1822	# ifdef _WIN32
		1823	# undef lstat
		1824	# define lstat(a,b) _stati64 (a,b)
		1825	# endif
		1826
		1827	#define DEF_STAT_INTERVAL 5.0074891
		1828	#define MIN_STAT_INTERVAL 0.1074891
		1829
		1830	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1831
		1832	#if EV_USE_INOTIFY
		1833	# define EV_INOTIFY_BUFSIZE 8192
		1834
		1835	static void noinline
		1836	infy_add (EV_P_ ev_stat *w)
		1837	{
		1838	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);
		1839
		1840	if (w->wd < 0)
		1841	{
		1842	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1843
		1844	/* monitor some parent directory for speedup hints */
		1845	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1846	{
		1847	char path [4096];
		1848	strcpy (path, w->path);
		1849
		1850	do
		1851	{
		1852	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1853	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1854
		1855	char *pend = strrchr (path, '/');
		1856
		1857	if (!pend)
		1858	break; /* whoops, no '/', complain to your admin */
		1859
		1860	*pend = 0;
		1861	w->wd = inotify_add_watch (fs_fd, path, mask);
		1862	}
		1863	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1864	}
		1865	}
		1866	else
		1867	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1868
		1869	if (w->wd >= 0)
		1870	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1871	}
		1872
		1873	static void noinline
		1874	infy_del (EV_P_ ev_stat *w)
		1875	{
		1876	int slot;
		1877	int wd = w->wd;
		1878
		1879	if (wd < 0)
		1880	return;
		1881
		1882	w->wd = -2;
		1883	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1884	wlist_del (&fs_hash [slot].head, (WL)w);
		1885
		1886	/* remove this watcher, if others are watching it, they will rearm */
		1887	inotify_rm_watch (fs_fd, wd);
		1888	}
		1889
		1890	static void noinline
		1891	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1892	{
		1893	if (slot < 0)
		1894	/* overflow, need to check for all hahs slots */
		1895	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1896	infy_wd (EV_A_ slot, wd, ev);
		1897	else
		1898	{
		1899	WL w_;
		1900
		1901	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1902	{
		1903	ev_stat *w = (ev_stat *)w_;
		1904	w_ = w_->next; /* lets us remove this watcher and all before it */
		1905
		1906	if (w->wd == wd || wd == -1)
		1907	{
		1908	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1909	{
		1910	w->wd = -1;
		1911	infy_add (EV_A_ w); /* re-add, no matter what */
		1912	}
		1913
		1914	stat_timer_cb (EV_A_ &w->timer, 0);
		1915	}
		1916	}
		1917	}
		1918	}
		1919
346	static void	1920	static void
347	ev_start (struct ev_watcher *w, int active)	1921	infy_cb (EV_P_ ev_io *w, int revents)
348	{	1922	{
349	w->pending = 0;	1923	char buf [EV_INOTIFY_BUFSIZE];
350	w->active = active;	1924	struct inotify_event *ev = (struct inotify_event *)buf;
		1925	int ofs;
		1926	int len = read (fs_fd, buf, sizeof (buf));
		1927
		1928	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1929	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1930	}
		1931
		1932	void inline_size
		1933	infy_init (EV_P)
		1934	{
		1935	if (fs_fd != -2)
		1936	return;
		1937
		1938	fs_fd = inotify_init ();
		1939
		1940	if (fs_fd >= 0)
		1941	{
		1942	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1943	ev_set_priority (&fs_w, EV_MAXPRI);
		1944	ev_io_start (EV_A_ &fs_w);
		1945	}
		1946	}
		1947
		1948	void inline_size
		1949	infy_fork (EV_P)
		1950	{
		1951	int slot;
		1952
		1953	if (fs_fd < 0)
		1954	return;
		1955
		1956	close (fs_fd);
		1957	fs_fd = inotify_init ();
		1958
		1959	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1960	{
		1961	WL w_ = fs_hash [slot].head;
		1962	fs_hash [slot].head = 0;
		1963
		1964	while (w_)
		1965	{
		1966	ev_stat *w = (ev_stat *)w_;
		1967	w_ = w_->next; /* lets us add this watcher */
		1968
		1969	w->wd = -1;
		1970
		1971	if (fs_fd >= 0)
		1972	infy_add (EV_A_ w); /* re-add, no matter what */
		1973	else
		1974	ev_timer_start (EV_A_ &w->timer);
		1975	}
		1976
		1977	}
		1978	}
		1979
		1980	#endif
		1981
		1982	void
		1983	ev_stat_stat (EV_P_ ev_stat *w)
		1984	{
		1985	if (lstat (w->path, &w->attr) < 0)
		1986	w->attr.st_nlink = 0;
		1987	else if (!w->attr.st_nlink)
		1988	w->attr.st_nlink = 1;
		1989	}
		1990
		1991	static void noinline
		1992	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1993	{
		1994	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1995
		1996	/* we copy this here each the time so that */
		1997	/* prev has the old value when the callback gets invoked */
		1998	w->prev = w->attr;
		1999	ev_stat_stat (EV_A_ w);
		2000
		2001	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2002	if (
		2003	w->prev.st_dev != w->attr.st_dev
		2004	|| w->prev.st_ino != w->attr.st_ino
		2005	|| w->prev.st_mode != w->attr.st_mode
		2006	|| w->prev.st_nlink != w->attr.st_nlink
		2007	|| w->prev.st_uid != w->attr.st_uid
		2008	|| w->prev.st_gid != w->attr.st_gid
		2009	|| w->prev.st_rdev != w->attr.st_rdev
		2010	|| w->prev.st_size != w->attr.st_size
		2011	|| w->prev.st_atime != w->attr.st_atime
		2012	|| w->prev.st_mtime != w->attr.st_mtime
		2013	|| w->prev.st_ctime != w->attr.st_ctime
		2014	) {
		2015	#if EV_USE_INOTIFY
		2016	infy_del (EV_A_ w);
		2017	infy_add (EV_A_ w);
		2018	ev_stat_stat (EV_A_ w); /* avoid race... */
		2019	#endif
		2020
		2021	ev_feed_event (EV_A_ w, EV_STAT);
		2022	}
		2023	}
		2024
		2025	void
		2026	ev_stat_start (EV_P_ ev_stat *w)
		2027	{
		2028	if (expect_false (ev_is_active (w)))
		2029	return;
		2030
		2031	/* since we use memcmp, we need to clear any padding data etc. */
		2032	memset (&w->prev, 0, sizeof (ev_statdata));
		2033	memset (&w->attr, 0, sizeof (ev_statdata));
		2034
		2035	ev_stat_stat (EV_A_ w);
		2036
		2037	if (w->interval < MIN_STAT_INTERVAL)
		2038	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2039
		2040	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2041	ev_set_priority (&w->timer, ev_priority (w));
		2042
		2043	#if EV_USE_INOTIFY
		2044	infy_init (EV_A);
		2045
		2046	if (fs_fd >= 0)
		2047	infy_add (EV_A_ w);
		2048	else
		2049	#endif
		2050	ev_timer_start (EV_A_ &w->timer);
		2051
		2052	ev_start (EV_A_ (W)w, 1);
		2053	}
		2054
		2055	void
		2056	ev_stat_stop (EV_P_ ev_stat *w)
		2057	{
		2058	clear_pending (EV_A_ (W)w);
		2059	if (expect_false (!ev_is_active (w)))
		2060	return;
		2061
		2062	#if EV_USE_INOTIFY
		2063	infy_del (EV_A_ w);
		2064	#endif
		2065	ev_timer_stop (EV_A_ &w->timer);
		2066
		2067	ev_stop (EV_A_ (W)w);
		2068	}
		2069	#endif
		2070
		2071	#if EV_IDLE_ENABLE
		2072	void
		2073	ev_idle_start (EV_P_ ev_idle *w)
		2074	{
		2075	if (expect_false (ev_is_active (w)))
		2076	return;
		2077
		2078	pri_adjust (EV_A_ (W)w);
		2079
		2080	{
		2081	int active = ++idlecnt [ABSPRI (w)];
		2082
		2083	++idleall;
		2084	ev_start (EV_A_ (W)w, active);
		2085
		2086	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2087	idles [ABSPRI (w)][active - 1] = w;
		2088	}
		2089	}
		2090
		2091	void
		2092	ev_idle_stop (EV_P_ ev_idle *w)
		2093	{
		2094	clear_pending (EV_A_ (W)w);
		2095	if (expect_false (!ev_is_active (w)))
		2096	return;
		2097
		2098	{
		2099	int active = ((W)w)->active;
		2100
		2101	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2102	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2103
		2104	ev_stop (EV_A_ (W)w);
		2105	--idleall;
		2106	}
		2107	}
		2108	#endif
		2109
		2110	void
		2111	ev_prepare_start (EV_P_ ev_prepare *w)
		2112	{
		2113	if (expect_false (ev_is_active (w)))
		2114	return;
		2115
		2116	ev_start (EV_A_ (W)w, ++preparecnt);
		2117	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2118	prepares [preparecnt - 1] = w;
		2119	}
		2120
		2121	void
		2122	ev_prepare_stop (EV_P_ ev_prepare *w)
		2123	{
		2124	clear_pending (EV_A_ (W)w);
		2125	if (expect_false (!ev_is_active (w)))
		2126	return;
		2127
		2128	{
		2129	int active = ((W)w)->active;
		2130	prepares [active - 1] = prepares [--preparecnt];
		2131	((W)prepares [active - 1])->active = active;
		2132	}
		2133
		2134	ev_stop (EV_A_ (W)w);
		2135	}
		2136
		2137	void
		2138	ev_check_start (EV_P_ ev_check *w)
		2139	{
		2140	if (expect_false (ev_is_active (w)))
		2141	return;
		2142
		2143	ev_start (EV_A_ (W)w, ++checkcnt);
		2144	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2145	checks [checkcnt - 1] = w;
		2146	}
		2147
		2148	void
		2149	ev_check_stop (EV_P_ ev_check *w)
		2150	{
		2151	clear_pending (EV_A_ (W)w);
		2152	if (expect_false (!ev_is_active (w)))
		2153	return;
		2154
		2155	{
		2156	int active = ((W)w)->active;
		2157	checks [active - 1] = checks [--checkcnt];
		2158	((W)checks [active - 1])->active = active;
		2159	}
		2160
		2161	ev_stop (EV_A_ (W)w);
		2162	}
		2163
		2164	#if EV_EMBED_ENABLE
		2165	void noinline
		2166	ev_embed_sweep (EV_P_ ev_embed *w)
		2167	{
		2168	ev_loop (w->loop, EVLOOP_NONBLOCK);
351	}	2169	}
352		2170
353	static void	2171	static void
354	ev_stop (struct ev_watcher *w)	2172	embed_cb (EV_P_ ev_io *io, int revents)
355	{	2173	{
356	if (w->pending)	2174	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
357	pendings [w->pending - 1].w = 0;
358		2175
359	w->active = 0;
360	/* nop */
361	}
362
363	void
364	evio_start (struct ev_io *w)
365	{
366	if (ev_is_active (w))	2176	if (ev_cb (w))
367	return;	2177	ev_feed_event (EV_A_ (W)w, EV_EMBED);
368
369	int fd = w->fd;
370
371	ev_start ((struct ev_watcher *)w, 1);
372	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
373	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
374
375	++fdchangecnt;
376	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
377	fdchanges [fdchangecnt - 1] = fd;
378	}
379
380	void
381	evio_stop (struct ev_io *w)
382	{
383	if (!ev_is_active (w))
384	return;
385
386	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
387	ev_stop ((struct ev_watcher *)w);
388
389	++fdchangecnt;
390	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
391	fdchanges [fdchangecnt - 1] = w->fd;
392	}
393
394	void
395	evtimer_start (struct ev_timer *w)
396	{
397	if (ev_is_active (w))
398	return;
399
400	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D
401	if (w->is_abs)
402	{
403	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
405	}
406	else	2178	else
407	w->at += ev_now;	2179	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	}	2180	}
415		2181
416	void	2182	void
417	evtimer_stop (struct ev_timer *w)	2183	ev_embed_start (EV_P_ ev_embed *w)
418	{	2184	{
		2185	if (expect_false (ev_is_active (w)))
		2186	return;
		2187
		2188	{
		2189	struct ev_loop *loop = w->loop;
		2190	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2191	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2192	}
		2193
		2194	ev_set_priority (&w->io, ev_priority (w));
		2195	ev_io_start (EV_A_ &w->io);
		2196
		2197	ev_start (EV_A_ (W)w, 1);
		2198	}
		2199
		2200	void
		2201	ev_embed_stop (EV_P_ ev_embed *w)
		2202	{
		2203	clear_pending (EV_A_ (W)w);
419	if (!ev_is_active (w))	2204	if (expect_false (!ev_is_active (w)))
420	return;	2205	return;
421		2206
422	timers [w->active - 1] = timers [--timercnt];	2207	ev_io_stop (EV_A_ &w->io);
423	downheap (w->active - 1);
424	ev_stop ((struct ev_watcher *)w);
425	}
426		2208
		2209	ev_stop (EV_A_ (W)w);
		2210	}
		2211	#endif
		2212
		2213	#if EV_FORK_ENABLE
427	void	2214	void
428	evsignal_start (struct ev_signal *w)	2215	ev_fork_start (EV_P_ ev_fork *w)
429	{	2216	{
430	if (ev_is_active (w))	2217	if (expect_false (ev_is_active (w)))
431	return;	2218	return;
432		2219
433	ev_start ((struct ev_watcher *)w, 1);	2220	ev_start (EV_A_ (W)w, ++forkcnt);
434	array_needsize (signals, signalmax, w->signum, signals_init);	2221	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
435	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2222	forks [forkcnt - 1] = w;
436	}	2223	}
437		2224
438	void	2225	void
439	evsignal_stop (struct ev_signal *w)	2226	ev_fork_stop (EV_P_ ev_fork *w)
440	{	2227	{
		2228	clear_pending (EV_A_ (W)w);
441	if (!ev_is_active (w))	2229	if (expect_false (!ev_is_active (w)))
442	return;	2230	return;
443		2231
444	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2232	{
445	ev_stop ((struct ev_watcher *)w);	2233	int active = ((W)w)->active;
		2234	forks [active - 1] = forks [--forkcnt];
		2235	((W)forks [active - 1])->active = active;
		2236	}
		2237
		2238	ev_stop (EV_A_ (W)w);
446	}	2239	}
		2240	#endif
447		2241
448	/*****************************************************************************/	2242	/*****************************************************************************/
449	#if 1	2243
		2244	struct ev_once
		2245	{
		2246	ev_io io;
		2247	ev_timer to;
		2248	void (*cb)(int revents, void *arg);
		2249	void *arg;
		2250	};
450		2251
451	static void	2252	static void
452	sin_cb (struct ev_io *w, int revents)	2253	once_cb (EV_P_ struct ev_once *once, int revents)
453	{	2254	{
454	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2255	void (*cb)(int revents, void *arg) = once->cb;
		2256	void *arg = once->arg;
		2257
		2258	ev_io_stop (EV_A_ &once->io);
		2259	ev_timer_stop (EV_A_ &once->to);
		2260	ev_free (once);
		2261
		2262	cb (revents, arg);
455	}	2263	}
456		2264
457	static void	2265	static void
		2266	once_cb_io (EV_P_ ev_io *w, int revents)
		2267	{
		2268	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2269	}
		2270
		2271	static void
458	ocb (struct ev_timer *w, int revents)	2272	once_cb_to (EV_P_ ev_timer *w, int revents)
459	{	2273	{
460	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2274	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
461	}	2275	}
462		2276
463	int main (void)	2277	void
		2278	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
464	{	2279	{
465	struct ev_io sin;	2280	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
466		2281
467	ev_init (0);	2282	if (expect_false (!once))
468		2283	{
469	evw_init (&sin, sin_cb, 55);	2284	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
470	evio_set (&sin, 0, EV_READ);
471	evio_start (&sin);
472
473	struct ev_timer t1;
474	evw_init (&t1, ocb, 1);
475	evtimer_set_rel (&t1, 1, 0);
476	evtimer_start (&t1);
477
478	struct ev_timer t2;
479	evw_init (&t2, ocb, 2);
480	evtimer_set_abs (&t2, ev_time () + 2, 0);
481	evtimer_start (&t2);
482
483	ev_loop (0);
484
485	return 0;	2285	return;
486	}	2286	}
487		2287
488	#endif	2288	once->cb = cb;
		2289	once->arg = arg;
489		2290
		2291	ev_init (&once->io, once_cb_io);
		2292	if (fd >= 0)
		2293	{
		2294	ev_io_set (&once->io, fd, events);
		2295	ev_io_start (EV_A_ &once->io);
		2296	}
490		2297
		2298	ev_init (&once->to, once_cb_to);
		2299	if (timeout >= 0.)
		2300	{
		2301	ev_timer_set (&once->to, timeout, 0.);
		2302	ev_timer_start (EV_A_ &once->to);
		2303	}
		2304	}
491		2305
		2306	#ifdef __cplusplus
		2307	}
		2308	#endif
492		2309

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