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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 1.186 by root, Sat Dec 15 23:14:38 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_STAT_ENABLE
		208	# undef EV_USE_INOTIFY
		209	# define EV_USE_INOTIFY 0
		210	#endif
		211
		212	#if EV_USE_INOTIFY
		213	# include <sys/inotify.h>
		214	#endif
		215
		216	#if EV_SELECT_IS_WINSOCKET
		217	# include <winsock.h>
		218	#endif
		219
		220	/**/
		221
		222	/*
		223	* This is used to avoid floating point rounding problems.
		224	* It is added to ev_rt_now when scheduling periodics
		225	* to ensure progress, time-wise, even when rounding
		226	* errors are against us.
		227	* This value is good at least till the year 4000.
		228	* Better solutions welcome.
		229	*/
		230	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		231
		232	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		233	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		234	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
		235
		236	#if __GNUC__ >= 4
		237	# define expect(expr,value) __builtin_expect ((expr),(value))
		238	# define noinline __attribute__ ((noinline))
		239	#else
		240	# define expect(expr,value) (expr)
		241	# define noinline
		242	# if __STDC_VERSION__ < 199901L
		243	# define inline
12	#endif	244	# endif
		245	#endif
13		246
14	#define HAVE_EPOLL 1	247	#define expect_false(expr) expect ((expr) != 0, 0)
15	#define HAVE_REALTIME 1	248	#define expect_true(expr) expect ((expr) != 0, 1)
16	#define HAVE_SELECT 0	249	#define inline_size static inline
17		250
18	#define MAX_BLOCKTIME 60.	251	#if EV_MINIMAL
		252	# define inline_speed static noinline
		253	#else
		254	# define inline_speed static inline
		255	#endif
19		256
		257	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		258	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		259
		260	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		261	#define EMPTY2(a,b) /* used to suppress some warnings */
		262
		263	typedef ev_watcher *W;
		264	typedef ev_watcher_list *WL;
		265	typedef ev_watcher_time *WT;
		266
		267	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		268
		269	#ifdef _WIN32
		270	# include "ev_win32.c"
		271	#endif
		272
		273	/*****************************************************************************/
		274
		275	static void (*syserr_cb)(const char *msg);
		276
		277	void
		278	ev_set_syserr_cb (void (*cb)(const char *msg))
		279	{
		280	syserr_cb = cb;
		281	}
		282
		283	static void noinline
		284	syserr (const char *msg)
		285	{
		286	if (!msg)
		287	msg = "(libev) system error";
		288
		289	if (syserr_cb)
		290	syserr_cb (msg);
		291	else
		292	{
		293	perror (msg);
		294	abort ();
		295	}
		296	}
		297
		298	static void *(*alloc)(void *ptr, long size);
		299
		300	void
		301	ev_set_allocator (void *(*cb)(void *ptr, long size))
		302	{
		303	alloc = cb;
		304	}
		305
		306	inline_speed void *
		307	ev_realloc (void *ptr, long size)
		308	{
		309	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		310
		311	if (!ptr && size)
		312	{
		313	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		314	abort ();
		315	}
		316
		317	return ptr;
		318	}
		319
		320	#define ev_malloc(size) ev_realloc (0, (size))
		321	#define ev_free(ptr) ev_realloc ((ptr), 0)
		322
		323	/*****************************************************************************/
		324
		325	typedef struct
		326	{
		327	WL head;
		328	unsigned char events;
		329	unsigned char reify;
		330	#if EV_SELECT_IS_WINSOCKET
		331	SOCKET handle;
		332	#endif
		333	} ANFD;
		334
		335	typedef struct
		336	{
		337	W w;
		338	int events;
		339	} ANPENDING;
		340
		341	#if EV_USE_INOTIFY
		342	typedef struct
		343	{
		344	WL head;
		345	} ANFS;
		346	#endif
		347
		348	#if EV_MULTIPLICITY
		349
		350	struct ev_loop
		351	{
		352	ev_tstamp ev_rt_now;
		353	#define ev_rt_now ((loop)->ev_rt_now)
		354	#define VAR(name,decl) decl;
		355	#include "ev_vars.h"
		356	#undef VAR
		357	};
20	#include "ev.h"	358	#include "ev_wrap.h"
21		359
22	struct ev_watcher {	360	static struct ev_loop default_loop_struct;
23	EV_WATCHER (ev_watcher);	361	struct ev_loop *ev_default_loop_ptr;
24	};
25		362
26	struct ev_watcher_list {	363	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		364
30	ev_tstamp ev_now;	365	ev_tstamp ev_rt_now;
31	int ev_method;	366	#define VAR(name,decl) static decl;
		367	#include "ev_vars.h"
		368	#undef VAR
32		369
33	static int have_monotonic; /* runtime */	370	static int ev_default_loop_ptr;
34		371
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	372	#endif
36	static void (*method_reify)(void);	373
37	static void (*method_poll)(ev_tstamp timeout);	374	/*****************************************************************************/
38		375
39	ev_tstamp	376	ev_tstamp
40	ev_time (void)	377	ev_time (void)
41	{	378	{
42	#if HAVE_REALTIME	379	#if EV_USE_REALTIME
43	struct timespec ts;	380	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	381	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	382	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	383	#else
47	struct timeval tv;	384	struct timeval tv;
48	gettimeofday (&tv, 0);	385	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	386	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	387	#endif
51	}	388	}
52		389
53	static ev_tstamp	390	ev_tstamp inline_size
54	get_clock (void)	391	get_clock (void)
55	{	392	{
56	#if HAVE_MONOTONIC	393	#if EV_USE_MONOTONIC
57	if (have_monotonic)	394	if (expect_true (have_monotonic))
58	{	395	{
59	struct timespec ts;	396	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	397	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	398	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	399	}
63	#endif	400	#endif
64		401
65	return ev_time ();	402	return ev_time ();
66	}	403	}
67		404
		405	#if EV_MULTIPLICITY
		406	ev_tstamp
		407	ev_now (EV_P)
		408	{
		409	return ev_rt_now;
		410	}
		411	#endif
		412
		413	int inline_size
		414	array_nextsize (int elem, int cur, int cnt)
		415	{
		416	int ncur = cur + 1;
		417
		418	do
		419	ncur <<= 1;
		420	while (cnt > ncur);
		421
		422	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		423	if (elem * ncur > 4096)
		424	{
		425	ncur *= elem;
		426	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		427	ncur = ncur - sizeof (void *) * 4;
		428	ncur /= elem;
		429	}
		430
		431	return ncur;
		432	}
		433
		434	static noinline void *
		435	array_realloc (int elem, void *base, int *cur, int cnt)
		436	{
		437	*cur = array_nextsize (elem, *cur, cnt);
		438	return ev_realloc (base, elem * *cur);
		439	}
		440
68	#define array_needsize(base,cur,cnt,init) \	441	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	442	if (expect_false ((cnt) > (cur))) \
70	{ \	443	{ \
71	int newcnt = cur; \	444	int ocur_ = (cur); \
72	do \	445	(base) = (type *)array_realloc \
		446	(sizeof (type), (base), &(cur), (cnt)); \
		447	init ((base) + (ocur_), (cur) - ocur_); \
		448	}
		449
		450	#if 0
		451	#define array_slim(type,stem) \
		452	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
73	{ \	453	{ \
74	newcnt += (newcnt >> 1) + 16; \	454	stem ## max = array_roundsize (stem ## cnt >> 1); \
75	} \	455	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
76	while ((cnt) > newcnt); \	456	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
77	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	457	}
78	base = realloc (base, sizeof (*base) * (newcnt)); \	458	#endif
79	init (base + cur, newcnt - cur); \	459
80	cur = newcnt; \	460	#define array_free(stem, idx) \
		461	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		462
		463	/*****************************************************************************/
		464
		465	void noinline
		466	ev_feed_event (EV_P_ void *w, int revents)
		467	{
		468	W w_ = (W)w;
		469	int pri = ABSPRI (w_);
		470
		471	if (expect_false (w_->pending))
		472	pendings [pri][w_->pending - 1].events |= revents;
		473	else
		474	{
		475	w_->pending = ++pendingcnt [pri];
		476	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		477	pendings [pri][w_->pending - 1].w = w_;
		478	pendings [pri][w_->pending - 1].events = revents;
		479	}
		480	}
		481
		482	void inline_speed
		483	queue_events (EV_P_ W *events, int eventcnt, int type)
		484	{
		485	int i;
		486
		487	for (i = 0; i < eventcnt; ++i)
		488	ev_feed_event (EV_A_ events [i], type);
		489	}
		490
		491	/*****************************************************************************/
		492
		493	void inline_size
		494	anfds_init (ANFD *base, int count)
		495	{
		496	while (count--)
		497	{
		498	base->head = 0;
		499	base->events = EV_NONE;
		500	base->reify = 0;
		501
		502	++base;
		503	}
		504	}
		505
		506	void inline_speed
		507	fd_event (EV_P_ int fd, int revents)
		508	{
		509	ANFD *anfd = anfds + fd;
		510	ev_io *w;
		511
		512	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		513	{
		514	int ev = w->events & revents;
		515
		516	if (ev)
		517	ev_feed_event (EV_A_ (W)w, ev);
		518	}
		519	}
		520
		521	void
		522	ev_feed_fd_event (EV_P_ int fd, int revents)
		523	{
		524	if (fd >= 0 && fd < anfdmax)
		525	fd_event (EV_A_ fd, revents);
		526	}
		527
		528	void inline_size
		529	fd_reify (EV_P)
		530	{
		531	int i;
		532
		533	for (i = 0; i < fdchangecnt; ++i)
		534	{
		535	int fd = fdchanges [i];
		536	ANFD *anfd = anfds + fd;
		537	ev_io *w;
		538
		539	unsigned char events = 0;
		540
		541	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		542	events |= (unsigned char)w->events;
		543
		544	#if EV_SELECT_IS_WINSOCKET
		545	if (events)
		546	{
		547	unsigned long argp;
		548	anfd->handle = _get_osfhandle (fd);
		549	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		550	}
		551	#endif
		552
		553	{
		554	unsigned char o_events = anfd->events;
		555	unsigned char o_reify = anfd->reify;
		556
		557	anfd->reify = 0;
		558	anfd->events = events;
		559
		560	if (o_events != events || o_reify & EV_IOFDSET)
		561	backend_modify (EV_A_ fd, o_events, events);
81	}	562	}
		563	}
		564
		565	fdchangecnt = 0;
		566	}
		567
		568	void inline_size
		569	fd_change (EV_P_ int fd, int flags)
		570	{
		571	unsigned char reify = anfds [fd].reify;
		572	anfds [fd].reify |= flags;
		573
		574	if (expect_true (!reify))
		575	{
		576	++fdchangecnt;
		577	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		578	fdchanges [fdchangecnt - 1] = fd;
		579	}
		580	}
		581
		582	void inline_speed
		583	fd_kill (EV_P_ int fd)
		584	{
		585	ev_io *w;
		586
		587	while ((w = (ev_io *)anfds [fd].head))
		588	{
		589	ev_io_stop (EV_A_ w);
		590	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		591	}
		592	}
		593
		594	int inline_size
		595	fd_valid (int fd)
		596	{
		597	#ifdef _WIN32
		598	return _get_osfhandle (fd) != -1;
		599	#else
		600	return fcntl (fd, F_GETFD) != -1;
		601	#endif
		602	}
		603
		604	/* called on EBADF to verify fds */
		605	static void noinline
		606	fd_ebadf (EV_P)
		607	{
		608	int fd;
		609
		610	for (fd = 0; fd < anfdmax; ++fd)
		611	if (anfds [fd].events)
		612	if (!fd_valid (fd) == -1 && errno == EBADF)
		613	fd_kill (EV_A_ fd);
		614	}
		615
		616	/* called on ENOMEM in select/poll to kill some fds and retry */
		617	static void noinline
		618	fd_enomem (EV_P)
		619	{
		620	int fd;
		621
		622	for (fd = anfdmax; fd--; )
		623	if (anfds [fd].events)
		624	{
		625	fd_kill (EV_A_ fd);
		626	return;
		627	}
		628	}
		629
		630	/* usually called after fork if backend needs to re-arm all fds from scratch */
		631	static void noinline
		632	fd_rearm_all (EV_P)
		633	{
		634	int fd;
		635
		636	for (fd = 0; fd < anfdmax; ++fd)
		637	if (anfds [fd].events)
		638	{
		639	anfds [fd].events = 0;
		640	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		641	}
		642	}
		643
		644	/*****************************************************************************/
		645
		646	void inline_speed
		647	upheap (WT *heap, int k)
		648	{
		649	WT w = heap [k];
		650
		651	while (k)
		652	{
		653	int p = (k - 1) >> 1;
		654
		655	if (heap [p]->at <= w->at)
		656	break;
		657
		658	heap [k] = heap [p];
		659	((W)heap [k])->active = k + 1;
		660	k = p;
		661	}
		662
		663	heap [k] = w;
		664	((W)heap [k])->active = k + 1;
		665	}
		666
		667	void inline_speed
		668	downheap (WT *heap, int N, int k)
		669	{
		670	WT w = heap [k];
		671
		672	for (;;)
		673	{
		674	int c = (k << 1) + 1;
		675
		676	if (c >= N)
		677	break;
		678
		679	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		680	? 1 : 0;
		681
		682	if (w->at <= heap [c]->at)
		683	break;
		684
		685	heap [k] = heap [c];
		686	((W)heap [k])->active = k + 1;
		687
		688	k = c;
		689	}
		690
		691	heap [k] = w;
		692	((W)heap [k])->active = k + 1;
		693	}
		694
		695	void inline_size
		696	adjustheap (WT *heap, int N, int k)
		697	{
		698	upheap (heap, k);
		699	downheap (heap, N, k);
		700	}
		701
		702	/*****************************************************************************/
82		703
83	typedef struct	704	typedef struct
84	{	705	{
85	struct ev_io *head;	706	WL head;
86	unsigned char wev, rev; /* want, received event set */	707	sig_atomic_t volatile gotsig;
87	} ANFD;	708	} ANSIG;
88		709
89	static ANFD *anfds;	710	static ANSIG *signals;
90	static int anfdmax;	711	static int signalmax;
91		712
92	static int *fdchanges;	713	static int sigpipe [2];
93	static int fdchangemax, fdchangecnt;	714	static sig_atomic_t volatile gotsig;
		715	static ev_io sigev;
		716
		717	void inline_size
		718	signals_init (ANSIG *base, int count)
		719	{
		720	while (count--)
		721	{
		722	base->head = 0;
		723	base->gotsig = 0;
		724
		725	++base;
		726	}
		727	}
94		728
95	static void	729	static void
96	anfds_init (ANFD *base, int count)	730	sighandler (int signum)
97	{	731	{
98	while (count--)	732	#if _WIN32
99	{	733	signal (signum, sighandler);
100	base->head = 0;	734	#endif
101	base->wev = base->rev = EV_NONE;	735
102	++base;	736	signals [signum - 1].gotsig = 1;
		737
		738	if (!gotsig)
103	}	739	{
		740	int old_errno = errno;
		741	gotsig = 1;
		742	write (sigpipe [1], &signum, 1);
		743	errno = old_errno;
		744	}
104	}	745	}
105		746
106	typedef struct	747	void noinline
		748	ev_feed_signal_event (EV_P_ int signum)
107	{	749	{
108	struct ev_watcher *w;	750	WL w;
109	int events;
110	} ANPENDING;
111		751
112	static ANPENDING *pendings;	752	#if EV_MULTIPLICITY
113	static int pendingmax, pendingcnt;	753	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		754	#endif
		755
		756	--signum;
		757
		758	if (signum < 0 || signum >= signalmax)
		759	return;
		760
		761	signals [signum].gotsig = 0;
		762
		763	for (w = signals [signum].head; w; w = w->next)
		764	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		765	}
114		766
115	static void	767	static void
116	event (struct ev_watcher *w, int events)	768	sigcb (EV_P_ ev_io *iow, int revents)
117	{	769	{
118	w->pending = ++pendingcnt;	770	int signum;
119	array_needsize (pendings, pendingmax, pendingcnt, );	771
120	pendings [pendingcnt - 1].w = w;	772	read (sigpipe [0], &revents, 1);
121	pendings [pendingcnt - 1].events = events;	773	gotsig = 0;
		774
		775	for (signum = signalmax; signum--; )
		776	if (signals [signum].gotsig)
		777	ev_feed_signal_event (EV_A_ signum + 1);
122	}	778	}
		779
		780	void inline_speed
		781	fd_intern (int fd)
		782	{
		783	#ifdef _WIN32
		784	int arg = 1;
		785	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		786	#else
		787	fcntl (fd, F_SETFD, FD_CLOEXEC);
		788	fcntl (fd, F_SETFL, O_NONBLOCK);
		789	#endif
		790	}
		791
		792	static void noinline
		793	siginit (EV_P)
		794	{
		795	fd_intern (sigpipe [0]);
		796	fd_intern (sigpipe [1]);
		797
		798	ev_io_set (&sigev, sigpipe [0], EV_READ);
		799	ev_io_start (EV_A_ &sigev);
		800	ev_unref (EV_A); /* child watcher should not keep loop alive */
		801	}
		802
		803	/*****************************************************************************/
		804
		805	static WL childs [EV_PID_HASHSIZE];
		806
		807	#ifndef _WIN32
		808
		809	static ev_signal childev;
		810
		811	void inline_speed
		812	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		813	{
		814	ev_child *w;
		815
		816	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		817	if (w->pid == pid || !w->pid)
		818	{
		819	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		820	w->rpid = pid;
		821	w->rstatus = status;
		822	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		823	}
		824	}
		825
		826	#ifndef WCONTINUED
		827	# define WCONTINUED 0
		828	#endif
123		829
124	static void	830	static void
125	fd_event (int fd, int events)	831	childcb (EV_P_ ev_signal *sw, int revents)
126	{	832	{
127	ANFD *anfd = anfds + fd;	833	int pid, status;
128	struct ev_io *w;
129		834
130	for (w = anfd->head; w; w = w->next)	835	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
131	{	836	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
132	int ev = w->events & events;	837	if (!WCONTINUED
		838	|| errno != EINVAL
		839	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		840	return;
133		841
134	if (ev)	842	/* make sure we are called again until all childs have been reaped */
135	event ((struct ev_watcher *)w, ev);	843	/* we need to do it this way so that the callback gets called before we continue */
136	}	844	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
137	}
138		845
139	static struct ev_timer **timers;	846	child_reap (EV_A_ sw, pid, pid, status);
140	static int timermax, timercnt;	847	if (EV_PID_HASHSIZE > 1)
141		848	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	}	849	}
158		850
159	static void	851	#endif
160	downheap (int k)
161	{
162	struct ev_timer *w = timers [k];
163		852
164	while (k <= (timercnt >> 1))	853	/*****************************************************************************/
165	{
166	int j = k << 1;
167		854
168	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	855	#if EV_USE_PORT
169	++j;	856	# include "ev_port.c"
170		857	#endif
171	if (w->at <= timers [j]->at)	858	#if EV_USE_KQUEUE
172	break;	859	# include "ev_kqueue.c"
173		860	#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	861	#if EV_USE_EPOLL
194	# include "ev_epoll.c"	862	# include "ev_epoll.c"
195	#endif	863	#endif
		864	#if EV_USE_POLL
		865	# include "ev_poll.c"
		866	#endif
196	#if HAVE_SELECT	867	#if EV_USE_SELECT
197	# include "ev_select.c"	868	# include "ev_select.c"
198	#endif	869	#endif
199		870
200	int ev_init (int flags)	871	int
		872	ev_version_major (void)
201	{	873	{
		874	return EV_VERSION_MAJOR;
		875	}
		876
		877	int
		878	ev_version_minor (void)
		879	{
		880	return EV_VERSION_MINOR;
		881	}
		882
		883	/* return true if we are running with elevated privileges and should ignore env variables */
		884	int inline_size
		885	enable_secure (void)
		886	{
		887	#ifdef _WIN32
		888	return 0;
		889	#else
		890	return getuid () != geteuid ()
		891	|| getgid () != getegid ();
		892	#endif
		893	}
		894
		895	unsigned int
		896	ev_supported_backends (void)
		897	{
		898	unsigned int flags = 0;
		899
		900	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		901	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		902	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		903	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		904	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		905
		906	return flags;
		907	}
		908
		909	unsigned int
		910	ev_recommended_backends (void)
		911	{
		912	unsigned int flags = ev_supported_backends ();
		913
		914	#ifndef __NetBSD__
		915	/* kqueue is borked on everything but netbsd apparently */
		916	/* it usually doesn't work correctly on anything but sockets and pipes */
		917	flags &= ~EVBACKEND_KQUEUE;
		918	#endif
		919	#ifdef __APPLE__
		920	// flags &= ~EVBACKEND_KQUEUE; for documentation
		921	flags &= ~EVBACKEND_POLL;
		922	#endif
		923
		924	return flags;
		925	}
		926
		927	unsigned int
		928	ev_embeddable_backends (void)
		929	{
		930	return EVBACKEND_EPOLL
		931	| EVBACKEND_KQUEUE
		932	| EVBACKEND_PORT;
		933	}
		934
		935	unsigned int
		936	ev_backend (EV_P)
		937	{
		938	return backend;
		939	}
		940
		941	unsigned int
		942	ev_loop_count (EV_P)
		943	{
		944	return loop_count;
		945	}
		946
		947	static void noinline
		948	loop_init (EV_P_ unsigned int flags)
		949	{
		950	if (!backend)
		951	{
202	#if HAVE_MONOTONIC	952	#if EV_USE_MONOTONIC
203	{	953	{
204	struct timespec ts;	954	struct timespec ts;
205	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	955	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
206	have_monotonic = 1;	956	have_monotonic = 1;
207	}	957	}
208	#endif	958	#endif
209		959
210	ev_now = ev_time ();	960	ev_rt_now = ev_time ();
		961	mn_now = get_clock ();
		962	now_floor = mn_now;
		963	rtmn_diff = ev_rt_now - mn_now;
211		964
		965	/* pid check not overridable via env */
		966	#ifndef _WIN32
		967	if (flags & EVFLAG_FORKCHECK)
		968	curpid = getpid ();
		969	#endif
		970
		971	if (!(flags & EVFLAG_NOENV)
		972	&& !enable_secure ()
		973	&& getenv ("LIBEV_FLAGS"))
		974	flags = atoi (getenv ("LIBEV_FLAGS"));
		975
		976	if (!(flags & 0x0000ffffUL))
		977	flags |= ev_recommended_backends ();
		978
		979	backend = 0;
		980	backend_fd = -1;
		981	#if EV_USE_INOTIFY
		982	fs_fd = -2;
		983	#endif
		984
		985	#if EV_USE_PORT
		986	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		987	#endif
		988	#if EV_USE_KQUEUE
		989	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		990	#endif
212	#if HAVE_EPOLL	991	#if EV_USE_EPOLL
213	if (epoll_init (flags))	992	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
214	return ev_method;
215	#endif	993	#endif
		994	#if EV_USE_POLL
		995	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		996	#endif
216	#if HAVE_SELECT	997	#if EV_USE_SELECT
217	if (select_init (flags))	998	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
218	return ev_method;
219	#endif	999	#endif
220		1000
221	ev_method = EVMETHOD_NONE;	1001	ev_init (&sigev, sigcb);
222	return ev_method;	1002	ev_set_priority (&sigev, EV_MAXPRI);
		1003	}
223	}	1004	}
224		1005
225	void ev_prefork (void)	1006	static void noinline
226	{	1007	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	{	1008	{
243	int i;	1009	int i;
244		1010
245	for (i = 0; i < pendingcnt; ++i)	1011	#if EV_USE_INOTIFY
		1012	if (fs_fd >= 0)
		1013	close (fs_fd);
		1014	#endif
		1015
		1016	if (backend_fd >= 0)
		1017	close (backend_fd);
		1018
		1019	#if EV_USE_PORT
		1020	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1021	#endif
		1022	#if EV_USE_KQUEUE
		1023	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1024	#endif
		1025	#if EV_USE_EPOLL
		1026	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1027	#endif
		1028	#if EV_USE_POLL
		1029	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1030	#endif
		1031	#if EV_USE_SELECT
		1032	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1033	#endif
		1034
		1035	for (i = NUMPRI; i--; )
		1036	{
		1037	array_free (pending, [i]);
		1038	#if EV_IDLE_ENABLE
		1039	array_free (idle, [i]);
		1040	#endif
246	{	1041	}
247	ANPENDING *p = pendings + i;
248		1042
249	if (p->w)	1043	ev_free (anfds); anfdmax = 0;
		1044
		1045	/* have to use the microsoft-never-gets-it-right macro */
		1046	array_free (fdchange, EMPTY);
		1047	array_free (timer, EMPTY);
		1048	#if EV_PERIODIC_ENABLE
		1049	array_free (periodic, EMPTY);
		1050	#endif
		1051	array_free (prepare, EMPTY);
		1052	array_free (check, EMPTY);
		1053	array_free (fork, EMPTY);
		1054
		1055	backend = 0;
		1056	}
		1057
		1058	void inline_size infy_fork (EV_P);
		1059
		1060	void inline_size
		1061	loop_fork (EV_P)
		1062	{
		1063	#if EV_USE_PORT
		1064	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1065	#endif
		1066	#if EV_USE_KQUEUE
		1067	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1068	#endif
		1069	#if EV_USE_EPOLL
		1070	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1071	#endif
		1072	#if EV_USE_INOTIFY
		1073	infy_fork (EV_A);
		1074	#endif
		1075
		1076	if (ev_is_active (&sigev))
		1077	{
		1078	/* default loop */
		1079
		1080	ev_ref (EV_A);
		1081	ev_io_stop (EV_A_ &sigev);
		1082	close (sigpipe [0]);
		1083	close (sigpipe [1]);
		1084
		1085	while (pipe (sigpipe))
		1086	syserr ("(libev) error creating pipe");
		1087
		1088	siginit (EV_A);
		1089	}
		1090
		1091	postfork = 0;
		1092	}
		1093
		1094	#if EV_MULTIPLICITY
		1095	struct ev_loop *
		1096	ev_loop_new (unsigned int flags)
		1097	{
		1098	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1099
		1100	memset (loop, 0, sizeof (struct ev_loop));
		1101
		1102	loop_init (EV_A_ flags);
		1103
		1104	if (ev_backend (EV_A))
		1105	return loop;
		1106
		1107	return 0;
		1108	}
		1109
		1110	void
		1111	ev_loop_destroy (EV_P)
		1112	{
		1113	loop_destroy (EV_A);
		1114	ev_free (loop);
		1115	}
		1116
		1117	void
		1118	ev_loop_fork (EV_P)
		1119	{
		1120	postfork = 1;
		1121	}
		1122
		1123	#endif
		1124
		1125	#if EV_MULTIPLICITY
		1126	struct ev_loop *
		1127	ev_default_loop_init (unsigned int flags)
		1128	#else
		1129	int
		1130	ev_default_loop (unsigned int flags)
		1131	#endif
		1132	{
		1133	if (sigpipe [0] == sigpipe [1])
		1134	if (pipe (sigpipe))
		1135	return 0;
		1136
		1137	if (!ev_default_loop_ptr)
		1138	{
		1139	#if EV_MULTIPLICITY
		1140	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1141	#else
		1142	ev_default_loop_ptr = 1;
		1143	#endif
		1144
		1145	loop_init (EV_A_ flags);
		1146
		1147	if (ev_backend (EV_A))
250	{	1148	{
251	p->w->pending = 0;	1149	siginit (EV_A);
252	p->w->cb (p->w, p->events);	1150
		1151	#ifndef _WIN32
		1152	ev_signal_init (&childev, childcb, SIGCHLD);
		1153	ev_set_priority (&childev, EV_MAXPRI);
		1154	ev_signal_start (EV_A_ &childev);
		1155	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1156	#endif
253	}	1157	}
		1158	else
		1159	ev_default_loop_ptr = 0;
		1160	}
		1161
		1162	return ev_default_loop_ptr;
		1163	}
		1164
		1165	void
		1166	ev_default_destroy (void)
		1167	{
		1168	#if EV_MULTIPLICITY
		1169	struct ev_loop *loop = ev_default_loop_ptr;
		1170	#endif
		1171
		1172	#ifndef _WIN32
		1173	ev_ref (EV_A); /* child watcher */
		1174	ev_signal_stop (EV_A_ &childev);
		1175	#endif
		1176
		1177	ev_ref (EV_A); /* signal watcher */
		1178	ev_io_stop (EV_A_ &sigev);
		1179
		1180	close (sigpipe [0]); sigpipe [0] = 0;
		1181	close (sigpipe [1]); sigpipe [1] = 0;
		1182
		1183	loop_destroy (EV_A);
		1184	}
		1185
		1186	void
		1187	ev_default_fork (void)
		1188	{
		1189	#if EV_MULTIPLICITY
		1190	struct ev_loop *loop = ev_default_loop_ptr;
		1191	#endif
		1192
		1193	if (backend)
		1194	postfork = 1;
		1195	}
		1196
		1197	/*****************************************************************************/
		1198
		1199	void
		1200	ev_invoke (EV_P_ void *w, int revents)
		1201	{
		1202	EV_CB_INVOKE ((W)w, revents);
		1203	}
		1204
		1205	void inline_speed
		1206	call_pending (EV_P)
		1207	{
		1208	int pri;
		1209
		1210	for (pri = NUMPRI; pri--; )
		1211	while (pendingcnt [pri])
		1212	{
		1213	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1214
		1215	if (expect_true (p->w))
		1216	{
		1217	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1218
		1219	p->w->pending = 0;
		1220	EV_CB_INVOKE (p->w, p->events);
		1221	}
254	}	1222	}
255
256	pendingcnt = 0;
257	}	1223	}
258		1224
259	static void	1225	void inline_size
260	timer_reify (void)	1226	timers_reify (EV_P)
261	{	1227	{
262	while (timercnt && timers [0]->at <= ev_now)	1228	while (timercnt && ((WT)timers [0])->at <= mn_now)
263	{	1229	{
264	struct ev_timer *w = timers [0];	1230	ev_timer *w = (ev_timer *)timers [0];
265		1231
		1232	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1233
266	/* first reschedule timer */	1234	/* first reschedule or stop timer */
267	if (w->repeat)	1235	if (w->repeat)
268	{	1236	{
269	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	1237	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
270	if (w->is_abs)	1238
271	w->at += floor ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
272	else
273	w->at = ev_now + w->repeat;	1239	((WT)w)->at += w->repeat;
		1240	if (((WT)w)->at < mn_now)
		1241	((WT)w)->at = mn_now;
274		1242
275	fprintf (stderr, "b %f\n", w->at);//D	1243	downheap (timers, timercnt, 0);
276
277	downheap (0);
278	}	1244	}
279	else	1245	else
280	evtimer_stop (w); /* nonrepeating: stop timer */	1246	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
281		1247
282	event ((struct ev_watcher *)w, EV_TIMEOUT);	1248	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1249	}
		1250	}
		1251
		1252	#if EV_PERIODIC_ENABLE
		1253	void inline_size
		1254	periodics_reify (EV_P)
		1255	{
		1256	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
283	}	1257	{
284	}	1258	ev_periodic *w = (ev_periodic *)periodics [0];
285		1259
286	int ev_loop_done;	1260	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
287		1261
		1262	/* first reschedule or stop timer */
		1263	if (w->reschedule_cb)
		1264	{
		1265	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1266	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1267	downheap (periodics, periodiccnt, 0);
		1268	}
		1269	else if (w->interval)
		1270	{
		1271	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1272	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1273	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1274	downheap (periodics, periodiccnt, 0);
		1275	}
		1276	else
		1277	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1278
		1279	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1280	}
		1281	}
		1282
		1283	static void noinline
		1284	periodics_reschedule (EV_P)
		1285	{
		1286	int i;
		1287
		1288	/* adjust periodics after time jump */
		1289	for (i = 0; i < periodiccnt; ++i)
		1290	{
		1291	ev_periodic *w = (ev_periodic *)periodics [i];
		1292
		1293	if (w->reschedule_cb)
		1294	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1295	else if (w->interval)
		1296	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1297	}
		1298
		1299	/* now rebuild the heap */
		1300	for (i = periodiccnt >> 1; i--; )
		1301	downheap (periodics, periodiccnt, i);
		1302	}
		1303	#endif
		1304
		1305	#if EV_IDLE_ENABLE
		1306	void inline_size
		1307	idle_reify (EV_P)
		1308	{
		1309	if (expect_false (idleall))
		1310	{
		1311	int pri;
		1312
		1313	for (pri = NUMPRI; pri--; )
		1314	{
		1315	if (pendingcnt [pri])
		1316	break;
		1317
		1318	if (idlecnt [pri])
		1319	{
		1320	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1321	break;
		1322	}
		1323	}
		1324	}
		1325	}
		1326	#endif
		1327
		1328	void inline_speed
		1329	time_update (EV_P_ ev_tstamp max_block)
		1330	{
		1331	int i;
		1332
		1333	#if EV_USE_MONOTONIC
		1334	if (expect_true (have_monotonic))
		1335	{
		1336	ev_tstamp odiff = rtmn_diff;
		1337
		1338	mn_now = get_clock ();
		1339
		1340	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1341	/* interpolate in the meantime */
		1342	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1343	{
		1344	ev_rt_now = rtmn_diff + mn_now;
		1345	return;
		1346	}
		1347
		1348	now_floor = mn_now;
		1349	ev_rt_now = ev_time ();
		1350
		1351	/* loop a few times, before making important decisions.
		1352	* on the choice of "4": one iteration isn't enough,
		1353	* in case we get preempted during the calls to
		1354	* ev_time and get_clock. a second call is almost guaranteed
		1355	* to succeed in that case, though. and looping a few more times
		1356	* doesn't hurt either as we only do this on time-jumps or
		1357	* in the unlikely event of having been preempted here.
		1358	*/
		1359	for (i = 4; --i; )
		1360	{
		1361	rtmn_diff = ev_rt_now - mn_now;
		1362
		1363	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1364	return; /* all is well */
		1365
		1366	ev_rt_now = ev_time ();
		1367	mn_now = get_clock ();
		1368	now_floor = mn_now;
		1369	}
		1370
		1371	# if EV_PERIODIC_ENABLE
		1372	periodics_reschedule (EV_A);
		1373	# endif
		1374	/* no timer adjustment, as the monotonic clock doesn't jump */
		1375	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1376	}
		1377	else
		1378	#endif
		1379	{
		1380	ev_rt_now = ev_time ();
		1381
		1382	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1383	{
		1384	#if EV_PERIODIC_ENABLE
		1385	periodics_reschedule (EV_A);
		1386	#endif
		1387	/* adjust timers. this is easy, as the offset is the same for all of them */
		1388	for (i = 0; i < timercnt; ++i)
		1389	((WT)timers [i])->at += ev_rt_now - mn_now;
		1390	}
		1391
		1392	mn_now = ev_rt_now;
		1393	}
		1394	}
		1395
		1396	void
		1397	ev_ref (EV_P)
		1398	{
		1399	++activecnt;
		1400	}
		1401
		1402	void
		1403	ev_unref (EV_P)
		1404	{
		1405	--activecnt;
		1406	}
		1407
		1408	static int loop_done;
		1409
		1410	void
288	int ev_loop (int flags)	1411	ev_loop (EV_P_ int flags)
289	{	1412	{
290	double block;
291	ev_loop_done = flags & EVLOOP_ONESHOT;	1413	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1414	? EVUNLOOP_ONE
		1415	: EVUNLOOP_CANCEL;
		1416
		1417	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
292		1418
293	do	1419	do
294	{	1420	{
		1421	#ifndef _WIN32
		1422	if (expect_false (curpid)) /* penalise the forking check even more */
		1423	if (expect_false (getpid () != curpid))
		1424	{
		1425	curpid = getpid ();
		1426	postfork = 1;
		1427	}
		1428	#endif
		1429
		1430	#if EV_FORK_ENABLE
		1431	/* we might have forked, so queue fork handlers */
		1432	if (expect_false (postfork))
		1433	if (forkcnt)
		1434	{
		1435	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1436	call_pending (EV_A);
		1437	}
		1438	#endif
		1439
		1440	/* queue prepare watchers (and execute them) */
		1441	if (expect_false (preparecnt))
		1442	{
		1443	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1444	call_pending (EV_A);
		1445	}
		1446
		1447	if (expect_false (!activecnt))
		1448	break;
		1449
		1450	/* we might have forked, so reify kernel state if necessary */
		1451	if (expect_false (postfork))
		1452	loop_fork (EV_A);
		1453
295	/* update fd-related kernel structures */	1454	/* update fd-related kernel structures */
296	method_reify (); fdchangecnt = 0;	1455	fd_reify (EV_A);
297		1456
298	/* calculate blocking time */	1457	/* calculate blocking time */
299	ev_now = ev_time ();	1458	{
		1459	ev_tstamp block;
300		1460
301	if (flags & EVLOOP_NONBLOCK)	1461	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
302	block = 0.;	1462	block = 0.; /* do not block at all */
303	else if (!timercnt)	1463	else
		1464	{
		1465	/* update time to cancel out callback processing overhead */
		1466	time_update (EV_A_ 1e100);
		1467
304	block = MAX_BLOCKTIME;	1468	block = MAX_BLOCKTIME;
305	else	1469
		1470	if (timercnt)
306	{	1471	{
307	block = timers [0]->at - ev_now + method_fudge;	1472	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
		1473	if (block > to) block = to;
		1474	}
		1475
		1476	#if EV_PERIODIC_ENABLE
		1477	if (periodiccnt)
		1478	{
		1479	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
		1480	if (block > to) block = to;
		1481	}
		1482	#endif
		1483
308	if (block < 0.) block = 0.;	1484	if (expect_false (block < 0.)) block = 0.;
309	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
310	}	1485	}
311		1486
312	fprintf (stderr, "block %f\n", block);//D	1487	++loop_count;
313	method_poll (block);	1488	backend_poll (EV_A_ block);
314		1489
		1490	/* update ev_rt_now, do magic */
		1491	time_update (EV_A_ block);
		1492	}
		1493
315	/* put pending timers into pendign queue and reschedule them */	1494	/* queue pending timers and reschedule them */
		1495	timers_reify (EV_A); /* relative timers called last */
		1496	#if EV_PERIODIC_ENABLE
		1497	periodics_reify (EV_A); /* absolute timers called first */
		1498	#endif
		1499
		1500	#if EV_IDLE_ENABLE
		1501	/* queue idle watchers unless other events are pending */
316	timer_reify ();	1502	idle_reify (EV_A);
		1503	#endif
317		1504
318	ev_now = ev_time ();	1505	/* queue check watchers, to be executed first */
		1506	if (expect_false (checkcnt))
		1507	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1508
319	call_pending ();	1509	call_pending (EV_A);
320	}
321	while (!ev_loop_done);
322	}
323		1510
324	static void	1511	}
325	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1512	while (expect_true (activecnt && !loop_done));
		1513
		1514	if (loop_done == EVUNLOOP_ONE)
		1515	loop_done = EVUNLOOP_CANCEL;
		1516	}
		1517
		1518	void
		1519	ev_unloop (EV_P_ int how)
		1520	{
		1521	loop_done = how;
		1522	}
		1523
		1524	/*****************************************************************************/
		1525
		1526	void inline_size
		1527	wlist_add (WL *head, WL elem)
326	{	1528	{
327	elem->next = *head;	1529	elem->next = *head;
328	*head = elem;	1530	*head = elem;
329	}	1531	}
330		1532
331	static void	1533	void inline_size
332	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1534	wlist_del (WL *head, WL elem)
333	{	1535	{
334	while (*head)	1536	while (*head)
335	{	1537	{
336	if (*head == elem)	1538	if (*head == elem)
337	{	1539	{
…		…
341		1543
342	head = &(*head)->next;	1544	head = &(*head)->next;
343	}	1545	}
344	}	1546	}
345		1547
		1548	void inline_speed
		1549	clear_pending (EV_P_ W w)
		1550	{
		1551	if (w->pending)
		1552	{
		1553	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1554	w->pending = 0;
		1555	}
		1556	}
		1557
		1558	int
		1559	ev_clear_pending (EV_P_ void *w)
		1560	{
		1561	W w_ = (W)w;
		1562	int pending = w_->pending;
		1563
		1564	if (expect_true (pending))
		1565	{
		1566	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1567	w_->pending = 0;
		1568	p->w = 0;
		1569	return p->events;
		1570	}
		1571	else
		1572	return 0;
		1573	}
		1574
		1575	void inline_size
		1576	pri_adjust (EV_P_ W w)
		1577	{
		1578	int pri = w->priority;
		1579	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1580	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1581	w->priority = pri;
		1582	}
		1583
		1584	void inline_speed
		1585	ev_start (EV_P_ W w, int active)
		1586	{
		1587	pri_adjust (EV_A_ w);
		1588	w->active = active;
		1589	ev_ref (EV_A);
		1590	}
		1591
		1592	void inline_size
		1593	ev_stop (EV_P_ W w)
		1594	{
		1595	ev_unref (EV_A);
		1596	w->active = 0;
		1597	}
		1598
		1599	/*****************************************************************************/
		1600
		1601	void noinline
		1602	ev_io_start (EV_P_ ev_io *w)
		1603	{
		1604	int fd = w->fd;
		1605
		1606	if (expect_false (ev_is_active (w)))
		1607	return;
		1608
		1609	assert (("ev_io_start called with negative fd", fd >= 0));
		1610
		1611	ev_start (EV_A_ (W)w, 1);
		1612	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1613	wlist_add (&anfds[fd].head, (WL)w);
		1614
		1615	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1616	w->events &= ~EV_IOFDSET;
		1617	}
		1618
		1619	void noinline
		1620	ev_io_stop (EV_P_ ev_io *w)
		1621	{
		1622	clear_pending (EV_A_ (W)w);
		1623	if (expect_false (!ev_is_active (w)))
		1624	return;
		1625
		1626	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1627
		1628	wlist_del (&anfds[w->fd].head, (WL)w);
		1629	ev_stop (EV_A_ (W)w);
		1630
		1631	fd_change (EV_A_ w->fd, 1);
		1632	}
		1633
		1634	void noinline
		1635	ev_timer_start (EV_P_ ev_timer *w)
		1636	{
		1637	if (expect_false (ev_is_active (w)))
		1638	return;
		1639
		1640	((WT)w)->at += mn_now;
		1641
		1642	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1643
		1644	ev_start (EV_A_ (W)w, ++timercnt);
		1645	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1646	timers [timercnt - 1] = (WT)w;
		1647	upheap (timers, timercnt - 1);
		1648
		1649	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1650	}
		1651
		1652	void noinline
		1653	ev_timer_stop (EV_P_ ev_timer *w)
		1654	{
		1655	clear_pending (EV_A_ (W)w);
		1656	if (expect_false (!ev_is_active (w)))
		1657	return;
		1658
		1659	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1660
		1661	{
		1662	int active = ((W)w)->active;
		1663
		1664	if (expect_true (--active < --timercnt))
		1665	{
		1666	timers [active] = timers [timercnt];
		1667	adjustheap (timers, timercnt, active);
		1668	}
		1669	}
		1670
		1671	((WT)w)->at -= mn_now;
		1672
		1673	ev_stop (EV_A_ (W)w);
		1674	}
		1675
		1676	void noinline
		1677	ev_timer_again (EV_P_ ev_timer *w)
		1678	{
		1679	if (ev_is_active (w))
		1680	{
		1681	if (w->repeat)
		1682	{
		1683	((WT)w)->at = mn_now + w->repeat;
		1684	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1685	}
		1686	else
		1687	ev_timer_stop (EV_A_ w);
		1688	}
		1689	else if (w->repeat)
		1690	{
		1691	w->at = w->repeat;
		1692	ev_timer_start (EV_A_ w);
		1693	}
		1694	}
		1695
		1696	#if EV_PERIODIC_ENABLE
		1697	void noinline
		1698	ev_periodic_start (EV_P_ ev_periodic *w)
		1699	{
		1700	if (expect_false (ev_is_active (w)))
		1701	return;
		1702
		1703	if (w->reschedule_cb)
		1704	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1705	else if (w->interval)
		1706	{
		1707	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1708	/* this formula differs from the one in periodic_reify because we do not always round up */
		1709	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1710	}
		1711	else
		1712	((WT)w)->at = w->offset;
		1713
		1714	ev_start (EV_A_ (W)w, ++periodiccnt);
		1715	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
		1716	periodics [periodiccnt - 1] = (WT)w;
		1717	upheap (periodics, periodiccnt - 1);
		1718
		1719	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1720	}
		1721
		1722	void noinline
		1723	ev_periodic_stop (EV_P_ ev_periodic *w)
		1724	{
		1725	clear_pending (EV_A_ (W)w);
		1726	if (expect_false (!ev_is_active (w)))
		1727	return;
		1728
		1729	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1730
		1731	{
		1732	int active = ((W)w)->active;
		1733
		1734	if (expect_true (--active < --periodiccnt))
		1735	{
		1736	periodics [active] = periodics [periodiccnt];
		1737	adjustheap (periodics, periodiccnt, active);
		1738	}
		1739	}
		1740
		1741	ev_stop (EV_A_ (W)w);
		1742	}
		1743
		1744	void noinline
		1745	ev_periodic_again (EV_P_ ev_periodic *w)
		1746	{
		1747	/* TODO: use adjustheap and recalculation */
		1748	ev_periodic_stop (EV_A_ w);
		1749	ev_periodic_start (EV_A_ w);
		1750	}
		1751	#endif
		1752
		1753	#ifndef SA_RESTART
		1754	# define SA_RESTART 0
		1755	#endif
		1756
		1757	void noinline
		1758	ev_signal_start (EV_P_ ev_signal *w)
		1759	{
		1760	#if EV_MULTIPLICITY
		1761	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1762	#endif
		1763	if (expect_false (ev_is_active (w)))
		1764	return;
		1765
		1766	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1767
		1768	{
		1769	#ifndef _WIN32
		1770	sigset_t full, prev;
		1771	sigfillset (&full);
		1772	sigprocmask (SIG_SETMASK, &full, &prev);
		1773	#endif
		1774
		1775	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1776
		1777	#ifndef _WIN32
		1778	sigprocmask (SIG_SETMASK, &prev, 0);
		1779	#endif
		1780	}
		1781
		1782	ev_start (EV_A_ (W)w, 1);
		1783	wlist_add (&signals [w->signum - 1].head, (WL)w);
		1784
		1785	if (!((WL)w)->next)
		1786	{
		1787	#if _WIN32
		1788	signal (w->signum, sighandler);
		1789	#else
		1790	struct sigaction sa;
		1791	sa.sa_handler = sighandler;
		1792	sigfillset (&sa.sa_mask);
		1793	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1794	sigaction (w->signum, &sa, 0);
		1795	#endif
		1796	}
		1797	}
		1798
		1799	void noinline
		1800	ev_signal_stop (EV_P_ ev_signal *w)
		1801	{
		1802	clear_pending (EV_A_ (W)w);
		1803	if (expect_false (!ev_is_active (w)))
		1804	return;
		1805
		1806	wlist_del (&signals [w->signum - 1].head, (WL)w);
		1807	ev_stop (EV_A_ (W)w);
		1808
		1809	if (!signals [w->signum - 1].head)
		1810	signal (w->signum, SIG_DFL);
		1811	}
		1812
		1813	void
		1814	ev_child_start (EV_P_ ev_child *w)
		1815	{
		1816	#if EV_MULTIPLICITY
		1817	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1818	#endif
		1819	if (expect_false (ev_is_active (w)))
		1820	return;
		1821
		1822	ev_start (EV_A_ (W)w, 1);
		1823	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1824	}
		1825
		1826	void
		1827	ev_child_stop (EV_P_ ev_child *w)
		1828	{
		1829	clear_pending (EV_A_ (W)w);
		1830	if (expect_false (!ev_is_active (w)))
		1831	return;
		1832
		1833	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1834	ev_stop (EV_A_ (W)w);
		1835	}
		1836
		1837	#if EV_STAT_ENABLE
		1838
		1839	# ifdef _WIN32
		1840	# undef lstat
		1841	# define lstat(a,b) _stati64 (a,b)
		1842	# endif
		1843
		1844	#define DEF_STAT_INTERVAL 5.0074891
		1845	#define MIN_STAT_INTERVAL 0.1074891
		1846
		1847	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1848
		1849	#if EV_USE_INOTIFY
		1850	# define EV_INOTIFY_BUFSIZE 8192
		1851
		1852	static void noinline
		1853	infy_add (EV_P_ ev_stat *w)
		1854	{
		1855	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);
		1856
		1857	if (w->wd < 0)
		1858	{
		1859	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1860
		1861	/* monitor some parent directory for speedup hints */
		1862	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1863	{
		1864	char path [4096];
		1865	strcpy (path, w->path);
		1866
		1867	do
		1868	{
		1869	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1870	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1871
		1872	char *pend = strrchr (path, '/');
		1873
		1874	if (!pend)
		1875	break; /* whoops, no '/', complain to your admin */
		1876
		1877	*pend = 0;
		1878	w->wd = inotify_add_watch (fs_fd, path, mask);
		1879	}
		1880	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1881	}
		1882	}
		1883	else
		1884	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1885
		1886	if (w->wd >= 0)
		1887	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1888	}
		1889
		1890	static void noinline
		1891	infy_del (EV_P_ ev_stat *w)
		1892	{
		1893	int slot;
		1894	int wd = w->wd;
		1895
		1896	if (wd < 0)
		1897	return;
		1898
		1899	w->wd = -2;
		1900	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1901	wlist_del (&fs_hash [slot].head, (WL)w);
		1902
		1903	/* remove this watcher, if others are watching it, they will rearm */
		1904	inotify_rm_watch (fs_fd, wd);
		1905	}
		1906
		1907	static void noinline
		1908	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1909	{
		1910	if (slot < 0)
		1911	/* overflow, need to check for all hahs slots */
		1912	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1913	infy_wd (EV_A_ slot, wd, ev);
		1914	else
		1915	{
		1916	WL w_;
		1917
		1918	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1919	{
		1920	ev_stat *w = (ev_stat *)w_;
		1921	w_ = w_->next; /* lets us remove this watcher and all before it */
		1922
		1923	if (w->wd == wd || wd == -1)
		1924	{
		1925	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1926	{
		1927	w->wd = -1;
		1928	infy_add (EV_A_ w); /* re-add, no matter what */
		1929	}
		1930
		1931	stat_timer_cb (EV_A_ &w->timer, 0);
		1932	}
		1933	}
		1934	}
		1935	}
		1936
346	static void	1937	static void
347	ev_start (struct ev_watcher *w, int active)	1938	infy_cb (EV_P_ ev_io *w, int revents)
348	{	1939	{
349	w->pending = 0;	1940	char buf [EV_INOTIFY_BUFSIZE];
350	w->active = active;	1941	struct inotify_event *ev = (struct inotify_event *)buf;
		1942	int ofs;
		1943	int len = read (fs_fd, buf, sizeof (buf));
		1944
		1945	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1946	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1947	}
		1948
		1949	void inline_size
		1950	infy_init (EV_P)
		1951	{
		1952	if (fs_fd != -2)
		1953	return;
		1954
		1955	fs_fd = inotify_init ();
		1956
		1957	if (fs_fd >= 0)
		1958	{
		1959	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1960	ev_set_priority (&fs_w, EV_MAXPRI);
		1961	ev_io_start (EV_A_ &fs_w);
		1962	}
		1963	}
		1964
		1965	void inline_size
		1966	infy_fork (EV_P)
		1967	{
		1968	int slot;
		1969
		1970	if (fs_fd < 0)
		1971	return;
		1972
		1973	close (fs_fd);
		1974	fs_fd = inotify_init ();
		1975
		1976	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1977	{
		1978	WL w_ = fs_hash [slot].head;
		1979	fs_hash [slot].head = 0;
		1980
		1981	while (w_)
		1982	{
		1983	ev_stat *w = (ev_stat *)w_;
		1984	w_ = w_->next; /* lets us add this watcher */
		1985
		1986	w->wd = -1;
		1987
		1988	if (fs_fd >= 0)
		1989	infy_add (EV_A_ w); /* re-add, no matter what */
		1990	else
		1991	ev_timer_start (EV_A_ &w->timer);
		1992	}
		1993
		1994	}
		1995	}
		1996
		1997	#endif
		1998
		1999	void
		2000	ev_stat_stat (EV_P_ ev_stat *w)
		2001	{
		2002	if (lstat (w->path, &w->attr) < 0)
		2003	w->attr.st_nlink = 0;
		2004	else if (!w->attr.st_nlink)
		2005	w->attr.st_nlink = 1;
		2006	}
		2007
		2008	static void noinline
		2009	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2010	{
		2011	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2012
		2013	/* we copy this here each the time so that */
		2014	/* prev has the old value when the callback gets invoked */
		2015	w->prev = w->attr;
		2016	ev_stat_stat (EV_A_ w);
		2017
		2018	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2019	if (
		2020	w->prev.st_dev != w->attr.st_dev
		2021	|| w->prev.st_ino != w->attr.st_ino
		2022	|| w->prev.st_mode != w->attr.st_mode
		2023	|| w->prev.st_nlink != w->attr.st_nlink
		2024	|| w->prev.st_uid != w->attr.st_uid
		2025	|| w->prev.st_gid != w->attr.st_gid
		2026	|| w->prev.st_rdev != w->attr.st_rdev
		2027	|| w->prev.st_size != w->attr.st_size
		2028	|| w->prev.st_atime != w->attr.st_atime
		2029	|| w->prev.st_mtime != w->attr.st_mtime
		2030	|| w->prev.st_ctime != w->attr.st_ctime
		2031	) {
		2032	#if EV_USE_INOTIFY
		2033	infy_del (EV_A_ w);
		2034	infy_add (EV_A_ w);
		2035	ev_stat_stat (EV_A_ w); /* avoid race... */
		2036	#endif
		2037
		2038	ev_feed_event (EV_A_ w, EV_STAT);
		2039	}
		2040	}
		2041
		2042	void
		2043	ev_stat_start (EV_P_ ev_stat *w)
		2044	{
		2045	if (expect_false (ev_is_active (w)))
		2046	return;
		2047
		2048	/* since we use memcmp, we need to clear any padding data etc. */
		2049	memset (&w->prev, 0, sizeof (ev_statdata));
		2050	memset (&w->attr, 0, sizeof (ev_statdata));
		2051
		2052	ev_stat_stat (EV_A_ w);
		2053
		2054	if (w->interval < MIN_STAT_INTERVAL)
		2055	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2056
		2057	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2058	ev_set_priority (&w->timer, ev_priority (w));
		2059
		2060	#if EV_USE_INOTIFY
		2061	infy_init (EV_A);
		2062
		2063	if (fs_fd >= 0)
		2064	infy_add (EV_A_ w);
		2065	else
		2066	#endif
		2067	ev_timer_start (EV_A_ &w->timer);
		2068
		2069	ev_start (EV_A_ (W)w, 1);
		2070	}
		2071
		2072	void
		2073	ev_stat_stop (EV_P_ ev_stat *w)
		2074	{
		2075	clear_pending (EV_A_ (W)w);
		2076	if (expect_false (!ev_is_active (w)))
		2077	return;
		2078
		2079	#if EV_USE_INOTIFY
		2080	infy_del (EV_A_ w);
		2081	#endif
		2082	ev_timer_stop (EV_A_ &w->timer);
		2083
		2084	ev_stop (EV_A_ (W)w);
		2085	}
		2086	#endif
		2087
		2088	#if EV_IDLE_ENABLE
		2089	void
		2090	ev_idle_start (EV_P_ ev_idle *w)
		2091	{
		2092	if (expect_false (ev_is_active (w)))
		2093	return;
		2094
		2095	pri_adjust (EV_A_ (W)w);
		2096
		2097	{
		2098	int active = ++idlecnt [ABSPRI (w)];
		2099
		2100	++idleall;
		2101	ev_start (EV_A_ (W)w, active);
		2102
		2103	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2104	idles [ABSPRI (w)][active - 1] = w;
		2105	}
		2106	}
		2107
		2108	void
		2109	ev_idle_stop (EV_P_ ev_idle *w)
		2110	{
		2111	clear_pending (EV_A_ (W)w);
		2112	if (expect_false (!ev_is_active (w)))
		2113	return;
		2114
		2115	{
		2116	int active = ((W)w)->active;
		2117
		2118	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2119	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2120
		2121	ev_stop (EV_A_ (W)w);
		2122	--idleall;
		2123	}
		2124	}
		2125	#endif
		2126
		2127	void
		2128	ev_prepare_start (EV_P_ ev_prepare *w)
		2129	{
		2130	if (expect_false (ev_is_active (w)))
		2131	return;
		2132
		2133	ev_start (EV_A_ (W)w, ++preparecnt);
		2134	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2135	prepares [preparecnt - 1] = w;
		2136	}
		2137
		2138	void
		2139	ev_prepare_stop (EV_P_ ev_prepare *w)
		2140	{
		2141	clear_pending (EV_A_ (W)w);
		2142	if (expect_false (!ev_is_active (w)))
		2143	return;
		2144
		2145	{
		2146	int active = ((W)w)->active;
		2147	prepares [active - 1] = prepares [--preparecnt];
		2148	((W)prepares [active - 1])->active = active;
		2149	}
		2150
		2151	ev_stop (EV_A_ (W)w);
		2152	}
		2153
		2154	void
		2155	ev_check_start (EV_P_ ev_check *w)
		2156	{
		2157	if (expect_false (ev_is_active (w)))
		2158	return;
		2159
		2160	ev_start (EV_A_ (W)w, ++checkcnt);
		2161	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2162	checks [checkcnt - 1] = w;
		2163	}
		2164
		2165	void
		2166	ev_check_stop (EV_P_ ev_check *w)
		2167	{
		2168	clear_pending (EV_A_ (W)w);
		2169	if (expect_false (!ev_is_active (w)))
		2170	return;
		2171
		2172	{
		2173	int active = ((W)w)->active;
		2174	checks [active - 1] = checks [--checkcnt];
		2175	((W)checks [active - 1])->active = active;
		2176	}
		2177
		2178	ev_stop (EV_A_ (W)w);
		2179	}
		2180
		2181	#if EV_EMBED_ENABLE
		2182	void noinline
		2183	ev_embed_sweep (EV_P_ ev_embed *w)
		2184	{
		2185	ev_loop (w->loop, EVLOOP_NONBLOCK);
351	}	2186	}
352		2187
353	static void	2188	static void
354	ev_stop (struct ev_watcher *w)	2189	embed_cb (EV_P_ ev_io *io, int revents)
355	{	2190	{
356	if (w->pending)	2191	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
357	pendings [w->pending - 1].w = 0;
358		2192
359	w->active = 0;
360	/* nop */
361	}
362
363	void
364	evio_start (struct ev_io *w)
365	{
366	if (ev_is_active (w))	2193	if (ev_cb (w))
367	return;	2194	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	2195	else
407	w->at += ev_now;	2196	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	}	2197	}
415		2198
416	void	2199	void
417	evtimer_stop (struct ev_timer *w)	2200	ev_embed_start (EV_P_ ev_embed *w)
418	{	2201	{
		2202	if (expect_false (ev_is_active (w)))
		2203	return;
		2204
		2205	{
		2206	struct ev_loop *loop = w->loop;
		2207	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2208	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2209	}
		2210
		2211	ev_set_priority (&w->io, ev_priority (w));
		2212	ev_io_start (EV_A_ &w->io);
		2213
		2214	ev_start (EV_A_ (W)w, 1);
		2215	}
		2216
		2217	void
		2218	ev_embed_stop (EV_P_ ev_embed *w)
		2219	{
		2220	clear_pending (EV_A_ (W)w);
419	if (!ev_is_active (w))	2221	if (expect_false (!ev_is_active (w)))
420	return;	2222	return;
421		2223
422	timers [w->active - 1] = timers [--timercnt];	2224	ev_io_stop (EV_A_ &w->io);
423	downheap (w->active - 1);
424	ev_stop ((struct ev_watcher *)w);
425	}
426		2225
		2226	ev_stop (EV_A_ (W)w);
		2227	}
		2228	#endif
		2229
		2230	#if EV_FORK_ENABLE
427	void	2231	void
428	evsignal_start (struct ev_signal *w)	2232	ev_fork_start (EV_P_ ev_fork *w)
429	{	2233	{
430	if (ev_is_active (w))	2234	if (expect_false (ev_is_active (w)))
431	return;	2235	return;
432		2236
433	ev_start ((struct ev_watcher *)w, 1);	2237	ev_start (EV_A_ (W)w, ++forkcnt);
434	array_needsize (signals, signalmax, w->signum, signals_init);	2238	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
435	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2239	forks [forkcnt - 1] = w;
436	}	2240	}
437		2241
438	void	2242	void
439	evsignal_stop (struct ev_signal *w)	2243	ev_fork_stop (EV_P_ ev_fork *w)
440	{	2244	{
		2245	clear_pending (EV_A_ (W)w);
441	if (!ev_is_active (w))	2246	if (expect_false (!ev_is_active (w)))
442	return;	2247	return;
443		2248
444	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2249	{
445	ev_stop ((struct ev_watcher *)w);	2250	int active = ((W)w)->active;
		2251	forks [active - 1] = forks [--forkcnt];
		2252	((W)forks [active - 1])->active = active;
		2253	}
		2254
		2255	ev_stop (EV_A_ (W)w);
446	}	2256	}
		2257	#endif
447		2258
448	/*****************************************************************************/	2259	/*****************************************************************************/
449	#if 1	2260
		2261	struct ev_once
		2262	{
		2263	ev_io io;
		2264	ev_timer to;
		2265	void (*cb)(int revents, void *arg);
		2266	void *arg;
		2267	};
450		2268
451	static void	2269	static void
452	sin_cb (struct ev_io *w, int revents)	2270	once_cb (EV_P_ struct ev_once *once, int revents)
453	{	2271	{
454	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2272	void (*cb)(int revents, void *arg) = once->cb;
		2273	void *arg = once->arg;
		2274
		2275	ev_io_stop (EV_A_ &once->io);
		2276	ev_timer_stop (EV_A_ &once->to);
		2277	ev_free (once);
		2278
		2279	cb (revents, arg);
455	}	2280	}
456		2281
457	static void	2282	static void
		2283	once_cb_io (EV_P_ ev_io *w, int revents)
		2284	{
		2285	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2286	}
		2287
		2288	static void
458	ocb (struct ev_timer *w, int revents)	2289	once_cb_to (EV_P_ ev_timer *w, int revents)
459	{	2290	{
460	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2291	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
461	}	2292	}
462		2293
463	int main (void)	2294	void
		2295	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
464	{	2296	{
465	struct ev_io sin;	2297	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
466		2298
467	ev_init (0);	2299	if (expect_false (!once))
468		2300	{
469	evw_init (&sin, sin_cb, 55);	2301	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;	2302	return;
486	}	2303	}
487		2304
488	#endif	2305	once->cb = cb;
		2306	once->arg = arg;
489		2307
		2308	ev_init (&once->io, once_cb_io);
		2309	if (fd >= 0)
		2310	{
		2311	ev_io_set (&once->io, fd, events);
		2312	ev_io_start (EV_A_ &once->io);
		2313	}
490		2314
		2315	ev_init (&once->to, once_cb_to);
		2316	if (timeout >= 0.)
		2317	{
		2318	ev_timer_set (&once->to, timeout, 0.);
		2319	ev_timer_start (EV_A_ &once->to);
		2320	}
		2321	}
491		2322
		2323	#ifdef __cplusplus
		2324	}
		2325	#endif
492		2326

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