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Comparing libev/ev.c (file contents):
Revision 1.2 by root, Tue Oct 30 21:42:12 2007 UTC vs.
Revision 1.193 by root, Sat Dec 22 05:47:58 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_NANOSLEEP
		60	# if HAVE_NANOSLEEP
		61	# define EV_USE_NANOSLEEP 1
		62	# else
		63	# define EV_USE_NANOSLEEP 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_SELECT
		68	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		69	# define EV_USE_SELECT 1
		70	# else
		71	# define EV_USE_SELECT 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_POLL
		76	# if HAVE_POLL && HAVE_POLL_H
		77	# define EV_USE_POLL 1
		78	# else
		79	# define EV_USE_POLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_EPOLL
		84	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		85	# define EV_USE_EPOLL 1
		86	# else
		87	# define EV_USE_EPOLL 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_KQUEUE
		92	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		93	# define EV_USE_KQUEUE 1
		94	# else
		95	# define EV_USE_KQUEUE 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_PORT
		100	# if HAVE_PORT_H && HAVE_PORT_CREATE
		101	# define EV_USE_PORT 1
		102	# else
		103	# define EV_USE_PORT 0
		104	# endif
		105	# endif
		106
		107	# ifndef EV_USE_INOTIFY
		108	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		109	# define EV_USE_INOTIFY 1
		110	# else
		111	# define EV_USE_INOTIFY 0
		112	# endif
		113	# endif
		114
		115	#endif
		116
1	#include <math.h>	117	#include <math.h>
2	#include <stdlib.h>	118	#include <stdlib.h>
		119	#include <fcntl.h>
		120	#include <stddef.h>
3		121
4	#include <stdio.h>	122	#include <stdio.h>
5		123
		124	#include <assert.h>
6	#include <errno.h>	125	#include <errno.h>
7	#include <sys/time.h>	126	#include <sys/types.h>
8	#include <time.h>	127	#include <time.h>
9		128
		129	#include <signal.h>
		130
		131	#ifdef EV_H
		132	# include EV_H
		133	#else
		134	# include "ev.h"
		135	#endif
		136
		137	#ifndef _WIN32
		138	# include <sys/time.h>
		139	# include <sys/wait.h>
		140	# include <unistd.h>
		141	#else
		142	# define WIN32_LEAN_AND_MEAN
		143	# include <windows.h>
		144	# ifndef EV_SELECT_IS_WINSOCKET
		145	# define EV_SELECT_IS_WINSOCKET 1
		146	# endif
		147	#endif
		148
		149	/**/
		150
		151	#ifndef EV_USE_MONOTONIC
		152	# define EV_USE_MONOTONIC 0
		153	#endif
		154
		155	#ifndef EV_USE_REALTIME
		156	# define EV_USE_REALTIME 0
		157	#endif
		158
		159	#ifndef EV_USE_NANOSLEEP
		160	# define EV_USE_NANOSLEEP 0
		161	#endif
		162
		163	#ifndef EV_USE_SELECT
		164	# define EV_USE_SELECT 1
		165	#endif
		166
		167	#ifndef EV_USE_POLL
		168	# ifdef _WIN32
		169	# define EV_USE_POLL 0
		170	# else
		171	# define EV_USE_POLL 1
		172	# endif
		173	#endif
		174
		175	#ifndef EV_USE_EPOLL
		176	# define EV_USE_EPOLL 0
		177	#endif
		178
		179	#ifndef EV_USE_KQUEUE
		180	# define EV_USE_KQUEUE 0
		181	#endif
		182
		183	#ifndef EV_USE_PORT
		184	# define EV_USE_PORT 0
		185	#endif
		186
		187	#ifndef EV_USE_INOTIFY
		188	# define EV_USE_INOTIFY 0
		189	#endif
		190
		191	#ifndef EV_PID_HASHSIZE
		192	# if EV_MINIMAL
		193	# define EV_PID_HASHSIZE 1
		194	# else
		195	# define EV_PID_HASHSIZE 16
		196	# endif
		197	#endif
		198
		199	#ifndef EV_INOTIFY_HASHSIZE
		200	# if EV_MINIMAL
		201	# define EV_INOTIFY_HASHSIZE 1
		202	# else
		203	# define EV_INOTIFY_HASHSIZE 16
		204	# endif
		205	#endif
		206
		207	/**/
		208
10	#ifdef CLOCK_MONOTONIC	209	#ifndef CLOCK_MONOTONIC
		210	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	211	# define EV_USE_MONOTONIC 0
		212	#endif
		213
		214	#ifndef CLOCK_REALTIME
		215	# undef EV_USE_REALTIME
		216	# define EV_USE_REALTIME 0
		217	#endif
		218
		219	#if !EV_STAT_ENABLE
		220	# undef EV_USE_INOTIFY
		221	# define EV_USE_INOTIFY 0
		222	#endif
		223
		224	#if !EV_USE_NANOSLEEP
		225	# ifndef _WIN32
		226	# include <sys/select.h>
12	#endif	227	# endif
		228	#endif
13		229
14	#define HAVE_EPOLL 1	230	#if EV_USE_INOTIFY
15	#define HAVE_REALTIME 1	231	# include <sys/inotify.h>
16	#define HAVE_SELECT 0	232	#endif
17		233
18	#define MAX_BLOCKTIME 60.	234	#if EV_SELECT_IS_WINSOCKET
		235	# include <winsock.h>
		236	#endif
19		237
		238	/**/
		239
		240	/*
		241	* This is used to avoid floating point rounding problems.
		242	* It is added to ev_rt_now when scheduling periodics
		243	* to ensure progress, time-wise, even when rounding
		244	* errors are against us.
		245	* This value is good at least till the year 4000.
		246	* Better solutions welcome.
		247	*/
		248	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		249
		250	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		251	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		252	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
		253
		254	#if __GNUC__ >= 4
		255	# define expect(expr,value) __builtin_expect ((expr),(value))
		256	# define noinline __attribute__ ((noinline))
		257	#else
		258	# define expect(expr,value) (expr)
		259	# define noinline
		260	# if __STDC_VERSION__ < 199901L
		261	# define inline
		262	# endif
		263	#endif
		264
		265	#define expect_false(expr) expect ((expr) != 0, 0)
		266	#define expect_true(expr) expect ((expr) != 0, 1)
		267	#define inline_size static inline
		268
		269	#if EV_MINIMAL
		270	# define inline_speed static noinline
		271	#else
		272	# define inline_speed static inline
		273	#endif
		274
		275	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		276	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		277
		278	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		279	#define EMPTY2(a,b) /* used to suppress some warnings */
		280
		281	typedef ev_watcher *W;
		282	typedef ev_watcher_list *WL;
		283	typedef ev_watcher_time *WT;
		284
		285	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		286
		287	#ifdef _WIN32
		288	# include "ev_win32.c"
		289	#endif
		290
		291	/*****************************************************************************/
		292
		293	static void (*syserr_cb)(const char *msg);
		294
		295	void
		296	ev_set_syserr_cb (void (*cb)(const char *msg))
		297	{
		298	syserr_cb = cb;
		299	}
		300
		301	static void noinline
		302	syserr (const char *msg)
		303	{
		304	if (!msg)
		305	msg = "(libev) system error";
		306
		307	if (syserr_cb)
		308	syserr_cb (msg);
		309	else
		310	{
		311	perror (msg);
		312	abort ();
		313	}
		314	}
		315
		316	static void *(*alloc)(void *ptr, long size);
		317
		318	void
		319	ev_set_allocator (void *(*cb)(void *ptr, long size))
		320	{
		321	alloc = cb;
		322	}
		323
		324	inline_speed void *
		325	ev_realloc (void *ptr, long size)
		326	{
		327	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		328
		329	if (!ptr && size)
		330	{
		331	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		332	abort ();
		333	}
		334
		335	return ptr;
		336	}
		337
		338	#define ev_malloc(size) ev_realloc (0, (size))
		339	#define ev_free(ptr) ev_realloc ((ptr), 0)
		340
		341	/*****************************************************************************/
		342
		343	typedef struct
		344	{
		345	WL head;
		346	unsigned char events;
		347	unsigned char reify;
		348	#if EV_SELECT_IS_WINSOCKET
		349	SOCKET handle;
		350	#endif
		351	} ANFD;
		352
		353	typedef struct
		354	{
		355	W w;
		356	int events;
		357	} ANPENDING;
		358
		359	#if EV_USE_INOTIFY
		360	typedef struct
		361	{
		362	WL head;
		363	} ANFS;
		364	#endif
		365
		366	#if EV_MULTIPLICITY
		367
		368	struct ev_loop
		369	{
		370	ev_tstamp ev_rt_now;
		371	#define ev_rt_now ((loop)->ev_rt_now)
		372	#define VAR(name,decl) decl;
		373	#include "ev_vars.h"
		374	#undef VAR
		375	};
20	#include "ev.h"	376	#include "ev_wrap.h"
21		377
22	struct ev_watcher {	378	static struct ev_loop default_loop_struct;
23	EV_WATCHER (ev_watcher);	379	struct ev_loop *ev_default_loop_ptr;
24	};
25		380
26	struct ev_watcher_list {	381	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		382
30	ev_tstamp ev_now;	383	ev_tstamp ev_rt_now;
31	int ev_method;	384	#define VAR(name,decl) static decl;
		385	#include "ev_vars.h"
		386	#undef VAR
32		387
33	static int have_monotonic; /* runtime */	388	static int ev_default_loop_ptr;
34		389
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	390	#endif
36	static void (*method_reify)(void);	391
37	static void (*method_poll)(ev_tstamp timeout);	392	/*****************************************************************************/
38		393
39	ev_tstamp	394	ev_tstamp
40	ev_time (void)	395	ev_time (void)
41	{	396	{
42	#if HAVE_REALTIME	397	#if EV_USE_REALTIME
43	struct timespec ts;	398	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	399	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	400	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	401	#else
47	struct timeval tv;	402	struct timeval tv;
48	gettimeofday (&tv, 0);	403	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	404	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	405	#endif
51	}	406	}
52		407
53	static ev_tstamp	408	ev_tstamp inline_size
54	get_clock (void)	409	get_clock (void)
55	{	410	{
56	#if HAVE_MONOTONIC	411	#if EV_USE_MONOTONIC
57	if (have_monotonic)	412	if (expect_true (have_monotonic))
58	{	413	{
59	struct timespec ts;	414	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	415	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	416	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	417	}
63	#endif	418	#endif
64		419
65	return ev_time ();	420	return ev_time ();
66	}	421	}
67		422
		423	#if EV_MULTIPLICITY
		424	ev_tstamp
		425	ev_now (EV_P)
		426	{
		427	return ev_rt_now;
		428	}
		429	#endif
		430
		431	void
		432	ev_sleep (ev_tstamp delay)
		433	{
		434	if (delay > 0.)
		435	{
		436	#if EV_USE_NANOSLEEP
		437	struct timespec ts;
		438
		439	ts.tv_sec = (time_t)delay;
		440	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		441
		442	nanosleep (&ts, 0);
		443	#elif defined(_WIN32)
		444	Sleep (delay * 1e3);
		445	#else
		446	struct timeval tv;
		447
		448	tv.tv_sec = (time_t)delay;
		449	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		450
		451	select (0, 0, 0, 0, &tv);
		452	#endif
		453	}
		454	}
		455
		456	/*****************************************************************************/
		457
		458	int inline_size
		459	array_nextsize (int elem, int cur, int cnt)
		460	{
		461	int ncur = cur + 1;
		462
		463	do
		464	ncur <<= 1;
		465	while (cnt > ncur);
		466
		467	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		468	if (elem * ncur > 4096)
		469	{
		470	ncur *= elem;
		471	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		472	ncur = ncur - sizeof (void *) * 4;
		473	ncur /= elem;
		474	}
		475
		476	return ncur;
		477	}
		478
		479	static noinline void *
		480	array_realloc (int elem, void *base, int *cur, int cnt)
		481	{
		482	*cur = array_nextsize (elem, *cur, cnt);
		483	return ev_realloc (base, elem * *cur);
		484	}
		485
68	#define array_needsize(base,cur,cnt,init) \	486	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	487	if (expect_false ((cnt) > (cur))) \
70	{ \	488	{ \
71	int newcnt = cur ? cur << 1 : 16; \	489	int ocur_ = (cur); \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	490	(base) = (type *)array_realloc \
73	base = realloc (base, sizeof (*base) * (newcnt)); \	491	(sizeof (type), (base), &(cur), (cnt)); \
74	init (base + cur, newcnt - cur); \	492	init ((base) + (ocur_), (cur) - ocur_); \
75	cur = newcnt; \	493	}
		494
		495	#if 0
		496	#define array_slim(type,stem) \
		497	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		498	{ \
		499	stem ## max = array_roundsize (stem ## cnt >> 1); \
		500	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		501	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		502	}
		503	#endif
		504
		505	#define array_free(stem, idx) \
		506	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		507
		508	/*****************************************************************************/
		509
		510	void noinline
		511	ev_feed_event (EV_P_ void *w, int revents)
		512	{
		513	W w_ = (W)w;
		514	int pri = ABSPRI (w_);
		515
		516	if (expect_false (w_->pending))
		517	pendings [pri][w_->pending - 1].events |= revents;
		518	else
		519	{
		520	w_->pending = ++pendingcnt [pri];
		521	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		522	pendings [pri][w_->pending - 1].w = w_;
		523	pendings [pri][w_->pending - 1].events = revents;
		524	}
		525	}
		526
		527	void inline_speed
		528	queue_events (EV_P_ W *events, int eventcnt, int type)
		529	{
		530	int i;
		531
		532	for (i = 0; i < eventcnt; ++i)
		533	ev_feed_event (EV_A_ events [i], type);
		534	}
		535
		536	/*****************************************************************************/
		537
		538	void inline_size
		539	anfds_init (ANFD *base, int count)
		540	{
		541	while (count--)
		542	{
		543	base->head = 0;
		544	base->events = EV_NONE;
		545	base->reify = 0;
		546
		547	++base;
		548	}
		549	}
		550
		551	void inline_speed
		552	fd_event (EV_P_ int fd, int revents)
		553	{
		554	ANFD *anfd = anfds + fd;
		555	ev_io *w;
		556
		557	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		558	{
		559	int ev = w->events & revents;
		560
		561	if (ev)
		562	ev_feed_event (EV_A_ (W)w, ev);
		563	}
		564	}
		565
		566	void
		567	ev_feed_fd_event (EV_P_ int fd, int revents)
		568	{
		569	if (fd >= 0 && fd < anfdmax)
		570	fd_event (EV_A_ fd, revents);
		571	}
		572
		573	void inline_size
		574	fd_reify (EV_P)
		575	{
		576	int i;
		577
		578	for (i = 0; i < fdchangecnt; ++i)
		579	{
		580	int fd = fdchanges [i];
		581	ANFD *anfd = anfds + fd;
		582	ev_io *w;
		583
		584	unsigned char events = 0;
		585
		586	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		587	events |= (unsigned char)w->events;
		588
		589	#if EV_SELECT_IS_WINSOCKET
		590	if (events)
		591	{
		592	unsigned long argp;
		593	anfd->handle = _get_osfhandle (fd);
		594	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		595	}
		596	#endif
		597
		598	{
		599	unsigned char o_events = anfd->events;
		600	unsigned char o_reify = anfd->reify;
		601
		602	anfd->reify = 0;
		603	anfd->events = events;
		604
		605	if (o_events != events || o_reify & EV_IOFDSET)
		606	backend_modify (EV_A_ fd, o_events, events);
76	}	607	}
		608	}
		609
		610	fdchangecnt = 0;
		611	}
		612
		613	void inline_size
		614	fd_change (EV_P_ int fd, int flags)
		615	{
		616	unsigned char reify = anfds [fd].reify;
		617	anfds [fd].reify |= flags;
		618
		619	if (expect_true (!reify))
		620	{
		621	++fdchangecnt;
		622	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		623	fdchanges [fdchangecnt - 1] = fd;
		624	}
		625	}
		626
		627	void inline_speed
		628	fd_kill (EV_P_ int fd)
		629	{
		630	ev_io *w;
		631
		632	while ((w = (ev_io *)anfds [fd].head))
		633	{
		634	ev_io_stop (EV_A_ w);
		635	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		636	}
		637	}
		638
		639	int inline_size
		640	fd_valid (int fd)
		641	{
		642	#ifdef _WIN32
		643	return _get_osfhandle (fd) != -1;
		644	#else
		645	return fcntl (fd, F_GETFD) != -1;
		646	#endif
		647	}
		648
		649	/* called on EBADF to verify fds */
		650	static void noinline
		651	fd_ebadf (EV_P)
		652	{
		653	int fd;
		654
		655	for (fd = 0; fd < anfdmax; ++fd)
		656	if (anfds [fd].events)
		657	if (!fd_valid (fd) == -1 && errno == EBADF)
		658	fd_kill (EV_A_ fd);
		659	}
		660
		661	/* called on ENOMEM in select/poll to kill some fds and retry */
		662	static void noinline
		663	fd_enomem (EV_P)
		664	{
		665	int fd;
		666
		667	for (fd = anfdmax; fd--; )
		668	if (anfds [fd].events)
		669	{
		670	fd_kill (EV_A_ fd);
		671	return;
		672	}
		673	}
		674
		675	/* usually called after fork if backend needs to re-arm all fds from scratch */
		676	static void noinline
		677	fd_rearm_all (EV_P)
		678	{
		679	int fd;
		680
		681	for (fd = 0; fd < anfdmax; ++fd)
		682	if (anfds [fd].events)
		683	{
		684	anfds [fd].events = 0;
		685	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		686	}
		687	}
		688
		689	/*****************************************************************************/
		690
		691	void inline_speed
		692	upheap (WT *heap, int k)
		693	{
		694	WT w = heap [k];
		695
		696	while (k)
		697	{
		698	int p = (k - 1) >> 1;
		699
		700	if (heap [p]->at <= w->at)
		701	break;
		702
		703	heap [k] = heap [p];
		704	((W)heap [k])->active = k + 1;
		705	k = p;
		706	}
		707
		708	heap [k] = w;
		709	((W)heap [k])->active = k + 1;
		710	}
		711
		712	void inline_speed
		713	downheap (WT *heap, int N, int k)
		714	{
		715	WT w = heap [k];
		716
		717	for (;;)
		718	{
		719	int c = (k << 1) + 1;
		720
		721	if (c >= N)
		722	break;
		723
		724	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		725	? 1 : 0;
		726
		727	if (w->at <= heap [c]->at)
		728	break;
		729
		730	heap [k] = heap [c];
		731	((W)heap [k])->active = k + 1;
		732
		733	k = c;
		734	}
		735
		736	heap [k] = w;
		737	((W)heap [k])->active = k + 1;
		738	}
		739
		740	void inline_size
		741	adjustheap (WT *heap, int N, int k)
		742	{
		743	upheap (heap, k);
		744	downheap (heap, N, k);
		745	}
		746
		747	/*****************************************************************************/
77		748
78	typedef struct	749	typedef struct
79	{	750	{
80	struct ev_io *head;	751	WL head;
81	unsigned char wev, rev; /* want, received event set */	752	sig_atomic_t volatile gotsig;
82	} ANFD;	753	} ANSIG;
83		754
84	static ANFD *anfds;	755	static ANSIG *signals;
85	static int anfdmax;	756	static int signalmax;
86		757
87	static int *fdchanges;	758	static int sigpipe [2];
88	static int fdchangemax, fdchangecnt;	759	static sig_atomic_t volatile gotsig;
		760	static ev_io sigev;
		761
		762	void inline_size
		763	signals_init (ANSIG *base, int count)
		764	{
		765	while (count--)
		766	{
		767	base->head = 0;
		768	base->gotsig = 0;
		769
		770	++base;
		771	}
		772	}
89		773
90	static void	774	static void
91	anfds_init (ANFD *base, int count)	775	sighandler (int signum)
92	{	776	{
93	while (count--)	777	#if _WIN32
94	{	778	signal (signum, sighandler);
95	base->head = 0;	779	#endif
96	base->wev = base->rev = EV_NONE;	780
97	++base;	781	signals [signum - 1].gotsig = 1;
		782
		783	if (!gotsig)
98	}	784	{
		785	int old_errno = errno;
		786	gotsig = 1;
		787	write (sigpipe [1], &signum, 1);
		788	errno = old_errno;
		789	}
99	}	790	}
100		791
101	typedef struct	792	void noinline
		793	ev_feed_signal_event (EV_P_ int signum)
102	{	794	{
103	struct ev_watcher *w;	795	WL w;
104	int events;
105	} ANPENDING;
106		796
107	static ANPENDING *pendings;	797	#if EV_MULTIPLICITY
108	static int pendingmax, pendingcnt;	798	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		799	#endif
		800
		801	--signum;
		802
		803	if (signum < 0 || signum >= signalmax)
		804	return;
		805
		806	signals [signum].gotsig = 0;
		807
		808	for (w = signals [signum].head; w; w = w->next)
		809	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		810	}
109		811
110	static void	812	static void
111	event (struct ev_watcher *w, int events)	813	sigcb (EV_P_ ev_io *iow, int revents)
112	{	814	{
113	w->pending = ++pendingcnt;	815	int signum;
114	array_needsize (pendings, pendingmax, pendingcnt, );	816
115	pendings [pendingcnt - 1].w = w;	817	read (sigpipe [0], &revents, 1);
116	pendings [pendingcnt - 1].events = events;	818	gotsig = 0;
		819
		820	for (signum = signalmax; signum--; )
		821	if (signals [signum].gotsig)
		822	ev_feed_signal_event (EV_A_ signum + 1);
117	}	823	}
		824
		825	void inline_speed
		826	fd_intern (int fd)
		827	{
		828	#ifdef _WIN32
		829	int arg = 1;
		830	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		831	#else
		832	fcntl (fd, F_SETFD, FD_CLOEXEC);
		833	fcntl (fd, F_SETFL, O_NONBLOCK);
		834	#endif
		835	}
		836
		837	static void noinline
		838	siginit (EV_P)
		839	{
		840	fd_intern (sigpipe [0]);
		841	fd_intern (sigpipe [1]);
		842
		843	ev_io_set (&sigev, sigpipe [0], EV_READ);
		844	ev_io_start (EV_A_ &sigev);
		845	ev_unref (EV_A); /* child watcher should not keep loop alive */
		846	}
		847
		848	/*****************************************************************************/
		849
		850	static WL childs [EV_PID_HASHSIZE];
		851
		852	#ifndef _WIN32
		853
		854	static ev_signal childev;
		855
		856	void inline_speed
		857	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		858	{
		859	ev_child *w;
		860
		861	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		862	if (w->pid == pid || !w->pid)
		863	{
		864	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		865	w->rpid = pid;
		866	w->rstatus = status;
		867	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		868	}
		869	}
		870
		871	#ifndef WCONTINUED
		872	# define WCONTINUED 0
		873	#endif
118		874
119	static void	875	static void
120	fd_event (int fd, int events)	876	childcb (EV_P_ ev_signal *sw, int revents)
121	{	877	{
122	ANFD *anfd = anfds + fd;	878	int pid, status;
123	struct ev_io *w;
124		879
125	for (w = anfd->head; w; w = w->next)	880	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
126	{	881	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
127	int ev = w->events & events;	882	if (!WCONTINUED
		883	|| errno != EINVAL
		884	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		885	return;
128		886
129	if (ev)	887	/* make sure we are called again until all childs have been reaped */
130	event ((struct ev_watcher *)w, ev);	888	/* we need to do it this way so that the callback gets called before we continue */
131	}	889	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
132	}
133		890
134	static struct ev_timer **timers;	891	child_reap (EV_A_ sw, pid, pid, status);
135	static int timermax, timercnt;	892	if (EV_PID_HASHSIZE > 1)
136		893	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
137	static void
138	upheap (int k)
139	{
140	struct ev_timer *w = timers [k];
141
142	while (k && timers [k >> 1]->at > w->at)
143	{
144	timers [k] = timers [k >> 1];
145	timers [k]->active = k + 1;
146	k >>= 1;
147	}
148
149	timers [k] = w;
150	timers [k]->active = k + 1;
151
152	}	894	}
153		895
154	static void	896	#endif
155	downheap (int k)
156	{
157	struct ev_timer *w = timers [k];
158		897
159	while (k < (timercnt >> 1))	898	/*****************************************************************************/
160	{
161	int j = k << 1;
162		899
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	900	#if EV_USE_PORT
164	++j;	901	# include "ev_port.c"
165		902	#endif
166	if (w->at <= timers [j]->at)	903	#if EV_USE_KQUEUE
167	break;	904	# include "ev_kqueue.c"
168		905	#endif
169	timers [k] = timers [j];
170	timers [k]->active = k + 1;
171	k = j;
172	}
173
174	timers [k] = w;
175	timers [k]->active = k + 1;
176	}
177
178	static struct ev_signal **signals;
179	static int signalmax, signalcnt;
180
181	static void
182	signals_init (struct ev_signal **base, int count)
183	{
184	while (count--)
185	*base++ = 0;
186	}
187
188	#if HAVE_EPOLL	906	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	907	# include "ev_epoll.c"
190	#endif	908	#endif
		909	#if EV_USE_POLL
		910	# include "ev_poll.c"
		911	#endif
191	#if HAVE_SELECT	912	#if EV_USE_SELECT
192	# include "ev_select.c"	913	# include "ev_select.c"
193	#endif	914	#endif
194		915
195	int ev_init (int flags)	916	int
		917	ev_version_major (void)
196	{	918	{
		919	return EV_VERSION_MAJOR;
		920	}
		921
		922	int
		923	ev_version_minor (void)
		924	{
		925	return EV_VERSION_MINOR;
		926	}
		927
		928	/* return true if we are running with elevated privileges and should ignore env variables */
		929	int inline_size
		930	enable_secure (void)
		931	{
		932	#ifdef _WIN32
		933	return 0;
		934	#else
		935	return getuid () != geteuid ()
		936	|| getgid () != getegid ();
		937	#endif
		938	}
		939
		940	unsigned int
		941	ev_supported_backends (void)
		942	{
		943	unsigned int flags = 0;
		944
		945	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		946	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		947	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		948	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		949	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		950
		951	return flags;
		952	}
		953
		954	unsigned int
		955	ev_recommended_backends (void)
		956	{
		957	unsigned int flags = ev_supported_backends ();
		958
		959	#ifndef __NetBSD__
		960	/* kqueue is borked on everything but netbsd apparently */
		961	/* it usually doesn't work correctly on anything but sockets and pipes */
		962	flags &= ~EVBACKEND_KQUEUE;
		963	#endif
		964	#ifdef __APPLE__
		965	// flags &= ~EVBACKEND_KQUEUE; for documentation
		966	flags &= ~EVBACKEND_POLL;
		967	#endif
		968
		969	return flags;
		970	}
		971
		972	unsigned int
		973	ev_embeddable_backends (void)
		974	{
		975	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		976	return EVBACKEND_KQUEUE
		977	| EVBACKEND_PORT;
		978	}
		979
		980	unsigned int
		981	ev_backend (EV_P)
		982	{
		983	return backend;
		984	}
		985
		986	unsigned int
		987	ev_loop_count (EV_P)
		988	{
		989	return loop_count;
		990	}
		991
		992	void
		993	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		994	{
		995	io_blocktime = interval;
		996	}
		997
		998	void
		999	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1000	{
		1001	timeout_blocktime = interval;
		1002	}
		1003
		1004	static void noinline
		1005	loop_init (EV_P_ unsigned int flags)
		1006	{
		1007	if (!backend)
		1008	{
197	#if HAVE_MONOTONIC	1009	#if EV_USE_MONOTONIC
198	{	1010	{
199	struct timespec ts;	1011	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1012	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	1013	have_monotonic = 1;
202	}	1014	}
203	#endif	1015	#endif
204		1016
205	ev_now = ev_time ();	1017	ev_rt_now = ev_time ();
		1018	mn_now = get_clock ();
		1019	now_floor = mn_now;
		1020	rtmn_diff = ev_rt_now - mn_now;
206		1021
		1022	io_blocktime = 0.;
		1023	timeout_blocktime = 0.;
		1024
		1025	/* pid check not overridable via env */
		1026	#ifndef _WIN32
		1027	if (flags & EVFLAG_FORKCHECK)
		1028	curpid = getpid ();
		1029	#endif
		1030
		1031	if (!(flags & EVFLAG_NOENV)
		1032	&& !enable_secure ()
		1033	&& getenv ("LIBEV_FLAGS"))
		1034	flags = atoi (getenv ("LIBEV_FLAGS"));
		1035
		1036	if (!(flags & 0x0000ffffUL))
		1037	flags |= ev_recommended_backends ();
		1038
		1039	backend = 0;
		1040	backend_fd = -1;
		1041	#if EV_USE_INOTIFY
		1042	fs_fd = -2;
		1043	#endif
		1044
		1045	#if EV_USE_PORT
		1046	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1047	#endif
		1048	#if EV_USE_KQUEUE
		1049	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1050	#endif
207	#if HAVE_EPOLL	1051	#if EV_USE_EPOLL
208	if (epoll_init (flags))	1052	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
209	return ev_method;
210	#endif	1053	#endif
		1054	#if EV_USE_POLL
		1055	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1056	#endif
211	#if HAVE_SELECT	1057	#if EV_USE_SELECT
212	if (select_init (flags))	1058	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
213	return ev_method;
214	#endif	1059	#endif
215		1060
216	ev_method = EVMETHOD_NONE;	1061	ev_init (&sigev, sigcb);
217	return ev_method;	1062	ev_set_priority (&sigev, EV_MAXPRI);
		1063	}
218	}	1064	}
219		1065
220	void ev_prefork (void)	1066	static void noinline
221	{	1067	loop_destroy (EV_P)
222	}
223
224	void ev_postfork_parent (void)
225	{
226	}
227
228	void ev_postfork_child (void)
229	{
230	#if HAVE_EPOLL
231	epoll_postfork_child ();
232	#endif
233	}
234
235	static void
236	call_pending ()
237	{	1068	{
238	int i;	1069	int i;
239		1070
240	for (i = 0; i < pendingcnt; ++i)	1071	#if EV_USE_INOTIFY
		1072	if (fs_fd >= 0)
		1073	close (fs_fd);
		1074	#endif
		1075
		1076	if (backend_fd >= 0)
		1077	close (backend_fd);
		1078
		1079	#if EV_USE_PORT
		1080	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1081	#endif
		1082	#if EV_USE_KQUEUE
		1083	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1084	#endif
		1085	#if EV_USE_EPOLL
		1086	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1087	#endif
		1088	#if EV_USE_POLL
		1089	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1090	#endif
		1091	#if EV_USE_SELECT
		1092	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1093	#endif
		1094
		1095	for (i = NUMPRI; i--; )
		1096	{
		1097	array_free (pending, [i]);
		1098	#if EV_IDLE_ENABLE
		1099	array_free (idle, [i]);
		1100	#endif
241	{	1101	}
242	ANPENDING *p = pendings + i;
243		1102
244	if (p->w)	1103	ev_free (anfds); anfdmax = 0;
		1104
		1105	/* have to use the microsoft-never-gets-it-right macro */
		1106	array_free (fdchange, EMPTY);
		1107	array_free (timer, EMPTY);
		1108	#if EV_PERIODIC_ENABLE
		1109	array_free (periodic, EMPTY);
		1110	#endif
		1111	#if EV_FORK_ENABLE
		1112	array_free (fork, EMPTY);
		1113	#endif
		1114	array_free (prepare, EMPTY);
		1115	array_free (check, EMPTY);
		1116
		1117	backend = 0;
		1118	}
		1119
		1120	void inline_size infy_fork (EV_P);
		1121
		1122	void inline_size
		1123	loop_fork (EV_P)
		1124	{
		1125	#if EV_USE_PORT
		1126	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1127	#endif
		1128	#if EV_USE_KQUEUE
		1129	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1130	#endif
		1131	#if EV_USE_EPOLL
		1132	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1133	#endif
		1134	#if EV_USE_INOTIFY
		1135	infy_fork (EV_A);
		1136	#endif
		1137
		1138	if (ev_is_active (&sigev))
		1139	{
		1140	/* default loop */
		1141
		1142	ev_ref (EV_A);
		1143	ev_io_stop (EV_A_ &sigev);
		1144	close (sigpipe [0]);
		1145	close (sigpipe [1]);
		1146
		1147	while (pipe (sigpipe))
		1148	syserr ("(libev) error creating pipe");
		1149
		1150	siginit (EV_A);
		1151	}
		1152
		1153	postfork = 0;
		1154	}
		1155
		1156	#if EV_MULTIPLICITY
		1157	struct ev_loop *
		1158	ev_loop_new (unsigned int flags)
		1159	{
		1160	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1161
		1162	memset (loop, 0, sizeof (struct ev_loop));
		1163
		1164	loop_init (EV_A_ flags);
		1165
		1166	if (ev_backend (EV_A))
		1167	return loop;
		1168
		1169	return 0;
		1170	}
		1171
		1172	void
		1173	ev_loop_destroy (EV_P)
		1174	{
		1175	loop_destroy (EV_A);
		1176	ev_free (loop);
		1177	}
		1178
		1179	void
		1180	ev_loop_fork (EV_P)
		1181	{
		1182	postfork = 1;
		1183	}
		1184
		1185	#endif
		1186
		1187	#if EV_MULTIPLICITY
		1188	struct ev_loop *
		1189	ev_default_loop_init (unsigned int flags)
		1190	#else
		1191	int
		1192	ev_default_loop (unsigned int flags)
		1193	#endif
		1194	{
		1195	if (sigpipe [0] == sigpipe [1])
		1196	if (pipe (sigpipe))
		1197	return 0;
		1198
		1199	if (!ev_default_loop_ptr)
		1200	{
		1201	#if EV_MULTIPLICITY
		1202	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1203	#else
		1204	ev_default_loop_ptr = 1;
		1205	#endif
		1206
		1207	loop_init (EV_A_ flags);
		1208
		1209	if (ev_backend (EV_A))
245	{	1210	{
246	p->w->pending = 0;	1211	siginit (EV_A);
247	p->w->cb (p->w, p->events);	1212
		1213	#ifndef _WIN32
		1214	ev_signal_init (&childev, childcb, SIGCHLD);
		1215	ev_set_priority (&childev, EV_MAXPRI);
		1216	ev_signal_start (EV_A_ &childev);
		1217	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1218	#endif
248	}	1219	}
		1220	else
		1221	ev_default_loop_ptr = 0;
		1222	}
		1223
		1224	return ev_default_loop_ptr;
		1225	}
		1226
		1227	void
		1228	ev_default_destroy (void)
		1229	{
		1230	#if EV_MULTIPLICITY
		1231	struct ev_loop *loop = ev_default_loop_ptr;
		1232	#endif
		1233
		1234	#ifndef _WIN32
		1235	ev_ref (EV_A); /* child watcher */
		1236	ev_signal_stop (EV_A_ &childev);
		1237	#endif
		1238
		1239	ev_ref (EV_A); /* signal watcher */
		1240	ev_io_stop (EV_A_ &sigev);
		1241
		1242	close (sigpipe [0]); sigpipe [0] = 0;
		1243	close (sigpipe [1]); sigpipe [1] = 0;
		1244
		1245	loop_destroy (EV_A);
		1246	}
		1247
		1248	void
		1249	ev_default_fork (void)
		1250	{
		1251	#if EV_MULTIPLICITY
		1252	struct ev_loop *loop = ev_default_loop_ptr;
		1253	#endif
		1254
		1255	if (backend)
		1256	postfork = 1;
		1257	}
		1258
		1259	/*****************************************************************************/
		1260
		1261	void
		1262	ev_invoke (EV_P_ void *w, int revents)
		1263	{
		1264	EV_CB_INVOKE ((W)w, revents);
		1265	}
		1266
		1267	void inline_speed
		1268	call_pending (EV_P)
		1269	{
		1270	int pri;
		1271
		1272	for (pri = NUMPRI; pri--; )
		1273	while (pendingcnt [pri])
		1274	{
		1275	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1276
		1277	if (expect_true (p->w))
		1278	{
		1279	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1280
		1281	p->w->pending = 0;
		1282	EV_CB_INVOKE (p->w, p->events);
		1283	}
249	}	1284	}
250
251	pendingcnt = 0;
252	}	1285	}
253		1286
254	static void	1287	void inline_size
255	timer_reify (void)	1288	timers_reify (EV_P)
256	{	1289	{
257	while (timercnt && timers [0]->at <= ev_now)	1290	while (timercnt && ((WT)timers [0])->at <= mn_now)
258	{	1291	{
259	struct ev_timer *w = timers [0];	1292	ev_timer *w = (ev_timer *)timers [0];
260		1293
261	fprintf (stderr, "0 %f, %d c%d\n", w->at, w->active, timercnt);//D	1294	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1295
262	/* first reschedule timer */	1296	/* first reschedule or stop timer */
263	if (w->repeat)	1297	if (w->repeat)
264	{	1298	{
265	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	1299	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
266	if (w->is_abs)	1300
267	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
268	else
269	w->at = ev_now + w->repeat;	1301	((WT)w)->at += w->repeat;
		1302	if (((WT)w)->at < mn_now)
		1303	((WT)w)->at = mn_now;
270		1304
271	fprintf (stderr, "b %f\n", w->at);//D	1305	downheap (timers, timercnt, 0);
272
273	downheap (0);
274	}	1306	}
275	else	1307	else
		1308	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1309
		1310	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1311	}
		1312	}
		1313
		1314	#if EV_PERIODIC_ENABLE
		1315	void inline_size
		1316	periodics_reify (EV_P)
		1317	{
		1318	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1319	{
		1320	ev_periodic *w = (ev_periodic *)periodics [0];
		1321
		1322	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1323
		1324	/* first reschedule or stop timer */
		1325	if (w->reschedule_cb)
276	{	1326	{
277	fprintf (stderr, "c %f, %d c%d\n", w->at, w->active, timercnt);//D	1327	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
278	evtimer_stop (w); /* nonrepeating: stop timer */	1328	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1329	downheap (periodics, periodiccnt, 0);
279	}	1330	}
		1331	else if (w->interval)
		1332	{
		1333	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1334	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1335	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1336	downheap (periodics, periodiccnt, 0);
		1337	}
		1338	else
		1339	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
280		1340
281	event ((struct ev_watcher *)w, EV_TIMEOUT);	1341	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1342	}
		1343	}
		1344
		1345	static void noinline
		1346	periodics_reschedule (EV_P)
		1347	{
		1348	int i;
		1349
		1350	/* adjust periodics after time jump */
		1351	for (i = 0; i < periodiccnt; ++i)
282	}	1352	{
283	}	1353	ev_periodic *w = (ev_periodic *)periodics [i];
284		1354
285	int ev_loop_done;	1355	if (w->reschedule_cb)
		1356	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1357	else if (w->interval)
		1358	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1359	}
286		1360
		1361	/* now rebuild the heap */
		1362	for (i = periodiccnt >> 1; i--; )
		1363	downheap (periodics, periodiccnt, i);
		1364	}
		1365	#endif
		1366
		1367	#if EV_IDLE_ENABLE
		1368	void inline_size
		1369	idle_reify (EV_P)
		1370	{
		1371	if (expect_false (idleall))
		1372	{
		1373	int pri;
		1374
		1375	for (pri = NUMPRI; pri--; )
		1376	{
		1377	if (pendingcnt [pri])
		1378	break;
		1379
		1380	if (idlecnt [pri])
		1381	{
		1382	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1383	break;
		1384	}
		1385	}
		1386	}
		1387	}
		1388	#endif
		1389
		1390	void inline_speed
		1391	time_update (EV_P_ ev_tstamp max_block)
		1392	{
		1393	int i;
		1394
		1395	#if EV_USE_MONOTONIC
		1396	if (expect_true (have_monotonic))
		1397	{
		1398	ev_tstamp odiff = rtmn_diff;
		1399
		1400	mn_now = get_clock ();
		1401
		1402	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1403	/* interpolate in the meantime */
		1404	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1405	{
		1406	ev_rt_now = rtmn_diff + mn_now;
		1407	return;
		1408	}
		1409
		1410	now_floor = mn_now;
		1411	ev_rt_now = ev_time ();
		1412
		1413	/* loop a few times, before making important decisions.
		1414	* on the choice of "4": one iteration isn't enough,
		1415	* in case we get preempted during the calls to
		1416	* ev_time and get_clock. a second call is almost guaranteed
		1417	* to succeed in that case, though. and looping a few more times
		1418	* doesn't hurt either as we only do this on time-jumps or
		1419	* in the unlikely event of having been preempted here.
		1420	*/
		1421	for (i = 4; --i; )
		1422	{
		1423	rtmn_diff = ev_rt_now - mn_now;
		1424
		1425	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1426	return; /* all is well */
		1427
		1428	ev_rt_now = ev_time ();
		1429	mn_now = get_clock ();
		1430	now_floor = mn_now;
		1431	}
		1432
		1433	# if EV_PERIODIC_ENABLE
		1434	periodics_reschedule (EV_A);
		1435	# endif
		1436	/* no timer adjustment, as the monotonic clock doesn't jump */
		1437	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1438	}
		1439	else
		1440	#endif
		1441	{
		1442	ev_rt_now = ev_time ();
		1443
		1444	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1445	{
		1446	#if EV_PERIODIC_ENABLE
		1447	periodics_reschedule (EV_A);
		1448	#endif
		1449	/* adjust timers. this is easy, as the offset is the same for all of them */
		1450	for (i = 0; i < timercnt; ++i)
		1451	((WT)timers [i])->at += ev_rt_now - mn_now;
		1452	}
		1453
		1454	mn_now = ev_rt_now;
		1455	}
		1456	}
		1457
		1458	void
		1459	ev_ref (EV_P)
		1460	{
		1461	++activecnt;
		1462	}
		1463
		1464	void
		1465	ev_unref (EV_P)
		1466	{
		1467	--activecnt;
		1468	}
		1469
		1470	static int loop_done;
		1471
		1472	void
287	int ev_loop (int flags)	1473	ev_loop (EV_P_ int flags)
288	{	1474	{
289	double block;
290	ev_loop_done = flags & EVLOOP_ONESHOT;	1475	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1476	? EVUNLOOP_ONE
		1477	: EVUNLOOP_CANCEL;
		1478
		1479	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
291		1480
292	do	1481	do
293	{	1482	{
		1483	#ifndef _WIN32
		1484	if (expect_false (curpid)) /* penalise the forking check even more */
		1485	if (expect_false (getpid () != curpid))
		1486	{
		1487	curpid = getpid ();
		1488	postfork = 1;
		1489	}
		1490	#endif
		1491
		1492	#if EV_FORK_ENABLE
		1493	/* we might have forked, so queue fork handlers */
		1494	if (expect_false (postfork))
		1495	if (forkcnt)
		1496	{
		1497	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1498	call_pending (EV_A);
		1499	}
		1500	#endif
		1501
		1502	/* queue prepare watchers (and execute them) */
		1503	if (expect_false (preparecnt))
		1504	{
		1505	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1506	call_pending (EV_A);
		1507	}
		1508
		1509	if (expect_false (!activecnt))
		1510	break;
		1511
		1512	/* we might have forked, so reify kernel state if necessary */
		1513	if (expect_false (postfork))
		1514	loop_fork (EV_A);
		1515
294	/* update fd-related kernel structures */	1516	/* update fd-related kernel structures */
295	method_reify (); fdchangecnt = 0;	1517	fd_reify (EV_A);
296		1518
297	/* calculate blocking time */	1519	/* calculate blocking time */
298	ev_now = ev_time ();	1520	{
		1521	ev_tstamp waittime = 0.;
		1522	ev_tstamp sleeptime = 0.;
299		1523
300	if (flags & EVLOOP_NONBLOCK)	1524	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
301	block = 0.;
302	else if (!timercnt)
303	block = MAX_BLOCKTIME;
304	else
305	{	1525	{
306	block = timers [0]->at - ev_now + method_fudge;	1526	/* update time to cancel out callback processing overhead */
307	if (block < 0.) block = 0.;	1527	time_update (EV_A_ 1e100);
308	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;	1528
		1529	waittime = MAX_BLOCKTIME;
		1530
		1531	if (timercnt)
		1532	{
		1533	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
		1534	if (waittime > to) waittime = to;
		1535	}
		1536
		1537	#if EV_PERIODIC_ENABLE
		1538	if (periodiccnt)
		1539	{
		1540	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
		1541	if (waittime > to) waittime = to;
		1542	}
		1543	#endif
		1544
		1545	if (expect_false (waittime < timeout_blocktime))
		1546	waittime = timeout_blocktime;
		1547
		1548	sleeptime = waittime - backend_fudge;
		1549
		1550	if (expect_true (sleeptime > io_blocktime))
		1551	sleeptime = io_blocktime;
		1552
		1553	if (sleeptime)
		1554	{
		1555	ev_sleep (sleeptime);
		1556	waittime -= sleeptime;
		1557	}
309	}	1558	}
310		1559
311	fprintf (stderr, "block %f\n", block);//D	1560	++loop_count;
312	method_poll (block);	1561	backend_poll (EV_A_ waittime);
313		1562
		1563	/* update ev_rt_now, do magic */
		1564	time_update (EV_A_ waittime + sleeptime);
		1565	}
		1566
314	/* put pending timers into pendign queue and reschedule them */	1567	/* queue pending timers and reschedule them */
		1568	timers_reify (EV_A); /* relative timers called last */
		1569	#if EV_PERIODIC_ENABLE
		1570	periodics_reify (EV_A); /* absolute timers called first */
		1571	#endif
		1572
		1573	#if EV_IDLE_ENABLE
		1574	/* queue idle watchers unless other events are pending */
315	timer_reify ();	1575	idle_reify (EV_A);
		1576	#endif
316		1577
317	ev_now = ev_time ();	1578	/* queue check watchers, to be executed first */
		1579	if (expect_false (checkcnt))
		1580	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1581
318	call_pending ();	1582	call_pending (EV_A);
319	}
320	while (!ev_loop_done);
321	}
322		1583
323	static void	1584	}
324	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1585	while (expect_true (activecnt && !loop_done));
		1586
		1587	if (loop_done == EVUNLOOP_ONE)
		1588	loop_done = EVUNLOOP_CANCEL;
		1589	}
		1590
		1591	void
		1592	ev_unloop (EV_P_ int how)
		1593	{
		1594	loop_done = how;
		1595	}
		1596
		1597	/*****************************************************************************/
		1598
		1599	void inline_size
		1600	wlist_add (WL *head, WL elem)
325	{	1601	{
326	elem->next = *head;	1602	elem->next = *head;
327	*head = elem;	1603	*head = elem;
328	}	1604	}
329		1605
330	static void	1606	void inline_size
331	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1607	wlist_del (WL *head, WL elem)
332	{	1608	{
333	while (*head)	1609	while (*head)
334	{	1610	{
335	if (*head == elem)	1611	if (*head == elem)
336	{	1612	{
…		…
340		1616
341	head = &(*head)->next;	1617	head = &(*head)->next;
342	}	1618	}
343	}	1619	}
344		1620
		1621	void inline_speed
		1622	clear_pending (EV_P_ W w)
		1623	{
		1624	if (w->pending)
		1625	{
		1626	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1627	w->pending = 0;
		1628	}
		1629	}
		1630
		1631	int
		1632	ev_clear_pending (EV_P_ void *w)
		1633	{
		1634	W w_ = (W)w;
		1635	int pending = w_->pending;
		1636
		1637	if (expect_true (pending))
		1638	{
		1639	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1640	w_->pending = 0;
		1641	p->w = 0;
		1642	return p->events;
		1643	}
		1644	else
		1645	return 0;
		1646	}
		1647
		1648	void inline_size
		1649	pri_adjust (EV_P_ W w)
		1650	{
		1651	int pri = w->priority;
		1652	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1653	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1654	w->priority = pri;
		1655	}
		1656
		1657	void inline_speed
		1658	ev_start (EV_P_ W w, int active)
		1659	{
		1660	pri_adjust (EV_A_ w);
		1661	w->active = active;
		1662	ev_ref (EV_A);
		1663	}
		1664
		1665	void inline_size
		1666	ev_stop (EV_P_ W w)
		1667	{
		1668	ev_unref (EV_A);
		1669	w->active = 0;
		1670	}
		1671
		1672	/*****************************************************************************/
		1673
		1674	void noinline
		1675	ev_io_start (EV_P_ ev_io *w)
		1676	{
		1677	int fd = w->fd;
		1678
		1679	if (expect_false (ev_is_active (w)))
		1680	return;
		1681
		1682	assert (("ev_io_start called with negative fd", fd >= 0));
		1683
		1684	ev_start (EV_A_ (W)w, 1);
		1685	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1686	wlist_add (&anfds[fd].head, (WL)w);
		1687
		1688	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1689	w->events &= ~EV_IOFDSET;
		1690	}
		1691
		1692	void noinline
		1693	ev_io_stop (EV_P_ ev_io *w)
		1694	{
		1695	clear_pending (EV_A_ (W)w);
		1696	if (expect_false (!ev_is_active (w)))
		1697	return;
		1698
		1699	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1700
		1701	wlist_del (&anfds[w->fd].head, (WL)w);
		1702	ev_stop (EV_A_ (W)w);
		1703
		1704	fd_change (EV_A_ w->fd, 1);
		1705	}
		1706
		1707	void noinline
		1708	ev_timer_start (EV_P_ ev_timer *w)
		1709	{
		1710	if (expect_false (ev_is_active (w)))
		1711	return;
		1712
		1713	((WT)w)->at += mn_now;
		1714
		1715	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1716
		1717	ev_start (EV_A_ (W)w, ++timercnt);
		1718	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1719	timers [timercnt - 1] = (WT)w;
		1720	upheap (timers, timercnt - 1);
		1721
		1722	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1723	}
		1724
		1725	void noinline
		1726	ev_timer_stop (EV_P_ ev_timer *w)
		1727	{
		1728	clear_pending (EV_A_ (W)w);
		1729	if (expect_false (!ev_is_active (w)))
		1730	return;
		1731
		1732	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1733
		1734	{
		1735	int active = ((W)w)->active;
		1736
		1737	if (expect_true (--active < --timercnt))
		1738	{
		1739	timers [active] = timers [timercnt];
		1740	adjustheap (timers, timercnt, active);
		1741	}
		1742	}
		1743
		1744	((WT)w)->at -= mn_now;
		1745
		1746	ev_stop (EV_A_ (W)w);
		1747	}
		1748
		1749	void noinline
		1750	ev_timer_again (EV_P_ ev_timer *w)
		1751	{
		1752	if (ev_is_active (w))
		1753	{
		1754	if (w->repeat)
		1755	{
		1756	((WT)w)->at = mn_now + w->repeat;
		1757	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1758	}
		1759	else
		1760	ev_timer_stop (EV_A_ w);
		1761	}
		1762	else if (w->repeat)
		1763	{
		1764	w->at = w->repeat;
		1765	ev_timer_start (EV_A_ w);
		1766	}
		1767	}
		1768
		1769	#if EV_PERIODIC_ENABLE
		1770	void noinline
		1771	ev_periodic_start (EV_P_ ev_periodic *w)
		1772	{
		1773	if (expect_false (ev_is_active (w)))
		1774	return;
		1775
		1776	if (w->reschedule_cb)
		1777	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1778	else if (w->interval)
		1779	{
		1780	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1781	/* this formula differs from the one in periodic_reify because we do not always round up */
		1782	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1783	}
		1784	else
		1785	((WT)w)->at = w->offset;
		1786
		1787	ev_start (EV_A_ (W)w, ++periodiccnt);
		1788	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
		1789	periodics [periodiccnt - 1] = (WT)w;
		1790	upheap (periodics, periodiccnt - 1);
		1791
		1792	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1793	}
		1794
		1795	void noinline
		1796	ev_periodic_stop (EV_P_ ev_periodic *w)
		1797	{
		1798	clear_pending (EV_A_ (W)w);
		1799	if (expect_false (!ev_is_active (w)))
		1800	return;
		1801
		1802	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1803
		1804	{
		1805	int active = ((W)w)->active;
		1806
		1807	if (expect_true (--active < --periodiccnt))
		1808	{
		1809	periodics [active] = periodics [periodiccnt];
		1810	adjustheap (periodics, periodiccnt, active);
		1811	}
		1812	}
		1813
		1814	ev_stop (EV_A_ (W)w);
		1815	}
		1816
		1817	void noinline
		1818	ev_periodic_again (EV_P_ ev_periodic *w)
		1819	{
		1820	/* TODO: use adjustheap and recalculation */
		1821	ev_periodic_stop (EV_A_ w);
		1822	ev_periodic_start (EV_A_ w);
		1823	}
		1824	#endif
		1825
		1826	#ifndef SA_RESTART
		1827	# define SA_RESTART 0
		1828	#endif
		1829
		1830	void noinline
		1831	ev_signal_start (EV_P_ ev_signal *w)
		1832	{
		1833	#if EV_MULTIPLICITY
		1834	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1835	#endif
		1836	if (expect_false (ev_is_active (w)))
		1837	return;
		1838
		1839	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1840
		1841	{
		1842	#ifndef _WIN32
		1843	sigset_t full, prev;
		1844	sigfillset (&full);
		1845	sigprocmask (SIG_SETMASK, &full, &prev);
		1846	#endif
		1847
		1848	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1849
		1850	#ifndef _WIN32
		1851	sigprocmask (SIG_SETMASK, &prev, 0);
		1852	#endif
		1853	}
		1854
		1855	ev_start (EV_A_ (W)w, 1);
		1856	wlist_add (&signals [w->signum - 1].head, (WL)w);
		1857
		1858	if (!((WL)w)->next)
		1859	{
		1860	#if _WIN32
		1861	signal (w->signum, sighandler);
		1862	#else
		1863	struct sigaction sa;
		1864	sa.sa_handler = sighandler;
		1865	sigfillset (&sa.sa_mask);
		1866	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1867	sigaction (w->signum, &sa, 0);
		1868	#endif
		1869	}
		1870	}
		1871
		1872	void noinline
		1873	ev_signal_stop (EV_P_ ev_signal *w)
		1874	{
		1875	clear_pending (EV_A_ (W)w);
		1876	if (expect_false (!ev_is_active (w)))
		1877	return;
		1878
		1879	wlist_del (&signals [w->signum - 1].head, (WL)w);
		1880	ev_stop (EV_A_ (W)w);
		1881
		1882	if (!signals [w->signum - 1].head)
		1883	signal (w->signum, SIG_DFL);
		1884	}
		1885
		1886	void
		1887	ev_child_start (EV_P_ ev_child *w)
		1888	{
		1889	#if EV_MULTIPLICITY
		1890	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1891	#endif
		1892	if (expect_false (ev_is_active (w)))
		1893	return;
		1894
		1895	ev_start (EV_A_ (W)w, 1);
		1896	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1897	}
		1898
		1899	void
		1900	ev_child_stop (EV_P_ ev_child *w)
		1901	{
		1902	clear_pending (EV_A_ (W)w);
		1903	if (expect_false (!ev_is_active (w)))
		1904	return;
		1905
		1906	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1907	ev_stop (EV_A_ (W)w);
		1908	}
		1909
		1910	#if EV_STAT_ENABLE
		1911
		1912	# ifdef _WIN32
		1913	# undef lstat
		1914	# define lstat(a,b) _stati64 (a,b)
		1915	# endif
		1916
		1917	#define DEF_STAT_INTERVAL 5.0074891
		1918	#define MIN_STAT_INTERVAL 0.1074891
		1919
		1920	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1921
		1922	#if EV_USE_INOTIFY
		1923	# define EV_INOTIFY_BUFSIZE 8192
		1924
		1925	static void noinline
		1926	infy_add (EV_P_ ev_stat *w)
		1927	{
		1928	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);
		1929
		1930	if (w->wd < 0)
		1931	{
		1932	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1933
		1934	/* monitor some parent directory for speedup hints */
		1935	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1936	{
		1937	char path [4096];
		1938	strcpy (path, w->path);
		1939
		1940	do
		1941	{
		1942	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1943	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1944
		1945	char *pend = strrchr (path, '/');
		1946
		1947	if (!pend)
		1948	break; /* whoops, no '/', complain to your admin */
		1949
		1950	*pend = 0;
		1951	w->wd = inotify_add_watch (fs_fd, path, mask);
		1952	}
		1953	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1954	}
		1955	}
		1956	else
		1957	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1958
		1959	if (w->wd >= 0)
		1960	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1961	}
		1962
		1963	static void noinline
		1964	infy_del (EV_P_ ev_stat *w)
		1965	{
		1966	int slot;
		1967	int wd = w->wd;
		1968
		1969	if (wd < 0)
		1970	return;
		1971
		1972	w->wd = -2;
		1973	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1974	wlist_del (&fs_hash [slot].head, (WL)w);
		1975
		1976	/* remove this watcher, if others are watching it, they will rearm */
		1977	inotify_rm_watch (fs_fd, wd);
		1978	}
		1979
		1980	static void noinline
		1981	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1982	{
		1983	if (slot < 0)
		1984	/* overflow, need to check for all hahs slots */
		1985	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1986	infy_wd (EV_A_ slot, wd, ev);
		1987	else
		1988	{
		1989	WL w_;
		1990
		1991	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1992	{
		1993	ev_stat *w = (ev_stat *)w_;
		1994	w_ = w_->next; /* lets us remove this watcher and all before it */
		1995
		1996	if (w->wd == wd || wd == -1)
		1997	{
		1998	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1999	{
		2000	w->wd = -1;
		2001	infy_add (EV_A_ w); /* re-add, no matter what */
		2002	}
		2003
		2004	stat_timer_cb (EV_A_ &w->timer, 0);
		2005	}
		2006	}
		2007	}
		2008	}
		2009
345	static void	2010	static void
346	ev_start (struct ev_watcher *w, int active)	2011	infy_cb (EV_P_ ev_io *w, int revents)
347	{	2012	{
348	w->pending = 0;	2013	char buf [EV_INOTIFY_BUFSIZE];
349	w->active = active;	2014	struct inotify_event *ev = (struct inotify_event *)buf;
		2015	int ofs;
		2016	int len = read (fs_fd, buf, sizeof (buf));
		2017
		2018	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2019	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2020	}
		2021
		2022	void inline_size
		2023	infy_init (EV_P)
		2024	{
		2025	if (fs_fd != -2)
		2026	return;
		2027
		2028	fs_fd = inotify_init ();
		2029
		2030	if (fs_fd >= 0)
		2031	{
		2032	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2033	ev_set_priority (&fs_w, EV_MAXPRI);
		2034	ev_io_start (EV_A_ &fs_w);
		2035	}
		2036	}
		2037
		2038	void inline_size
		2039	infy_fork (EV_P)
		2040	{
		2041	int slot;
		2042
		2043	if (fs_fd < 0)
		2044	return;
		2045
		2046	close (fs_fd);
		2047	fs_fd = inotify_init ();
		2048
		2049	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2050	{
		2051	WL w_ = fs_hash [slot].head;
		2052	fs_hash [slot].head = 0;
		2053
		2054	while (w_)
		2055	{
		2056	ev_stat *w = (ev_stat *)w_;
		2057	w_ = w_->next; /* lets us add this watcher */
		2058
		2059	w->wd = -1;
		2060
		2061	if (fs_fd >= 0)
		2062	infy_add (EV_A_ w); /* re-add, no matter what */
		2063	else
		2064	ev_timer_start (EV_A_ &w->timer);
		2065	}
		2066
		2067	}
		2068	}
		2069
		2070	#endif
		2071
		2072	void
		2073	ev_stat_stat (EV_P_ ev_stat *w)
		2074	{
		2075	if (lstat (w->path, &w->attr) < 0)
		2076	w->attr.st_nlink = 0;
		2077	else if (!w->attr.st_nlink)
		2078	w->attr.st_nlink = 1;
		2079	}
		2080
		2081	static void noinline
		2082	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2083	{
		2084	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2085
		2086	/* we copy this here each the time so that */
		2087	/* prev has the old value when the callback gets invoked */
		2088	w->prev = w->attr;
		2089	ev_stat_stat (EV_A_ w);
		2090
		2091	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2092	if (
		2093	w->prev.st_dev != w->attr.st_dev
		2094	|| w->prev.st_ino != w->attr.st_ino
		2095	|| w->prev.st_mode != w->attr.st_mode
		2096	|| w->prev.st_nlink != w->attr.st_nlink
		2097	|| w->prev.st_uid != w->attr.st_uid
		2098	|| w->prev.st_gid != w->attr.st_gid
		2099	|| w->prev.st_rdev != w->attr.st_rdev
		2100	|| w->prev.st_size != w->attr.st_size
		2101	|| w->prev.st_atime != w->attr.st_atime
		2102	|| w->prev.st_mtime != w->attr.st_mtime
		2103	|| w->prev.st_ctime != w->attr.st_ctime
		2104	) {
		2105	#if EV_USE_INOTIFY
		2106	infy_del (EV_A_ w);
		2107	infy_add (EV_A_ w);
		2108	ev_stat_stat (EV_A_ w); /* avoid race... */
		2109	#endif
		2110
		2111	ev_feed_event (EV_A_ w, EV_STAT);
		2112	}
		2113	}
		2114
		2115	void
		2116	ev_stat_start (EV_P_ ev_stat *w)
		2117	{
		2118	if (expect_false (ev_is_active (w)))
		2119	return;
		2120
		2121	/* since we use memcmp, we need to clear any padding data etc. */
		2122	memset (&w->prev, 0, sizeof (ev_statdata));
		2123	memset (&w->attr, 0, sizeof (ev_statdata));
		2124
		2125	ev_stat_stat (EV_A_ w);
		2126
		2127	if (w->interval < MIN_STAT_INTERVAL)
		2128	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2129
		2130	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2131	ev_set_priority (&w->timer, ev_priority (w));
		2132
		2133	#if EV_USE_INOTIFY
		2134	infy_init (EV_A);
		2135
		2136	if (fs_fd >= 0)
		2137	infy_add (EV_A_ w);
		2138	else
		2139	#endif
		2140	ev_timer_start (EV_A_ &w->timer);
		2141
		2142	ev_start (EV_A_ (W)w, 1);
		2143	}
		2144
		2145	void
		2146	ev_stat_stop (EV_P_ ev_stat *w)
		2147	{
		2148	clear_pending (EV_A_ (W)w);
		2149	if (expect_false (!ev_is_active (w)))
		2150	return;
		2151
		2152	#if EV_USE_INOTIFY
		2153	infy_del (EV_A_ w);
		2154	#endif
		2155	ev_timer_stop (EV_A_ &w->timer);
		2156
		2157	ev_stop (EV_A_ (W)w);
		2158	}
		2159	#endif
		2160
		2161	#if EV_IDLE_ENABLE
		2162	void
		2163	ev_idle_start (EV_P_ ev_idle *w)
		2164	{
		2165	if (expect_false (ev_is_active (w)))
		2166	return;
		2167
		2168	pri_adjust (EV_A_ (W)w);
		2169
		2170	{
		2171	int active = ++idlecnt [ABSPRI (w)];
		2172
		2173	++idleall;
		2174	ev_start (EV_A_ (W)w, active);
		2175
		2176	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2177	idles [ABSPRI (w)][active - 1] = w;
		2178	}
		2179	}
		2180
		2181	void
		2182	ev_idle_stop (EV_P_ ev_idle *w)
		2183	{
		2184	clear_pending (EV_A_ (W)w);
		2185	if (expect_false (!ev_is_active (w)))
		2186	return;
		2187
		2188	{
		2189	int active = ((W)w)->active;
		2190
		2191	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2192	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2193
		2194	ev_stop (EV_A_ (W)w);
		2195	--idleall;
		2196	}
		2197	}
		2198	#endif
		2199
		2200	void
		2201	ev_prepare_start (EV_P_ ev_prepare *w)
		2202	{
		2203	if (expect_false (ev_is_active (w)))
		2204	return;
		2205
		2206	ev_start (EV_A_ (W)w, ++preparecnt);
		2207	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2208	prepares [preparecnt - 1] = w;
		2209	}
		2210
		2211	void
		2212	ev_prepare_stop (EV_P_ ev_prepare *w)
		2213	{
		2214	clear_pending (EV_A_ (W)w);
		2215	if (expect_false (!ev_is_active (w)))
		2216	return;
		2217
		2218	{
		2219	int active = ((W)w)->active;
		2220	prepares [active - 1] = prepares [--preparecnt];
		2221	((W)prepares [active - 1])->active = active;
		2222	}
		2223
		2224	ev_stop (EV_A_ (W)w);
		2225	}
		2226
		2227	void
		2228	ev_check_start (EV_P_ ev_check *w)
		2229	{
		2230	if (expect_false (ev_is_active (w)))
		2231	return;
		2232
		2233	ev_start (EV_A_ (W)w, ++checkcnt);
		2234	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2235	checks [checkcnt - 1] = w;
		2236	}
		2237
		2238	void
		2239	ev_check_stop (EV_P_ ev_check *w)
		2240	{
		2241	clear_pending (EV_A_ (W)w);
		2242	if (expect_false (!ev_is_active (w)))
		2243	return;
		2244
		2245	{
		2246	int active = ((W)w)->active;
		2247	checks [active - 1] = checks [--checkcnt];
		2248	((W)checks [active - 1])->active = active;
		2249	}
		2250
		2251	ev_stop (EV_A_ (W)w);
		2252	}
		2253
		2254	#if EV_EMBED_ENABLE
		2255	void noinline
		2256	ev_embed_sweep (EV_P_ ev_embed *w)
		2257	{
		2258	ev_loop (w->other, EVLOOP_NONBLOCK);
350	}	2259	}
351		2260
352	static void	2261	static void
353	ev_stop (struct ev_watcher *w)	2262	embed_io_cb (EV_P_ ev_io *io, int revents)
354	{	2263	{
355	if (w->pending)	2264	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
356	pendings [w->pending - 1].w = 0;
357		2265
358	w->active = 0;
359	/* nop */
360	}
361
362	void
363	evio_start (struct ev_io *w)
364	{
365	if (ev_is_active (w))	2266	if (ev_cb (w))
366	return;	2267	ev_feed_event (EV_A_ (W)w, EV_EMBED);
367
368	int fd = w->fd;
369
370	ev_start ((struct ev_watcher *)w, 1);
371	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
372	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
373
374	++fdchangecnt;
375	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
376	fdchanges [fdchangecnt - 1] = fd;
377	}
378
379	void
380	evio_stop (struct ev_io *w)
381	{
382	if (!ev_is_active (w))
383	return;
384
385	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
386	ev_stop ((struct ev_watcher *)w);
387
388	++fdchangecnt;
389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
390	fdchanges [fdchangecnt - 1] = w->fd;
391	}
392
393	void
394	evtimer_start (struct ev_timer *w)
395	{
396	if (ev_is_active (w))
397	return;
398
399	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D
400	if (w->is_abs)
401	{
402	/* this formula differs from the one in timer_reify becuse we do not round up */
403	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
405	}
406	else	2268	else
407	w->at += ev_now;	2269	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	}	2270	}
415		2271
416	void	2272	static void
417	evtimer_stop (struct ev_timer *w)	2273	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
418	{	2274	{
419	fprintf (stderr, "-topping %d, %d\n", w->active, timercnt);//D	2275	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2276
		2277	fd_reify (w->other);
		2278	}
		2279
		2280	void
		2281	ev_embed_start (EV_P_ ev_embed *w)
		2282	{
		2283	if (expect_false (ev_is_active (w)))
		2284	return;
		2285
		2286	{
		2287	struct ev_loop *loop = w->other;
		2288	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2289	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2290	}
		2291
		2292	ev_set_priority (&w->io, ev_priority (w));
		2293	ev_io_start (EV_A_ &w->io);
		2294
		2295	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2296	ev_set_priority (&w->prepare, EV_MINPRI);
		2297	ev_prepare_start (EV_A_ &w->prepare);
		2298
		2299	ev_start (EV_A_ (W)w, 1);
		2300	}
		2301
		2302	void
		2303	ev_embed_stop (EV_P_ ev_embed *w)
		2304	{
		2305	clear_pending (EV_A_ (W)w);
420	if (!ev_is_active (w))	2306	if (expect_false (!ev_is_active (w)))
421	return;	2307	return;
422		2308
423	fprintf (stderr, "stopping %d, %d\n", w->active, timercnt);//D	2309	ev_io_stop (EV_A_ &w->io);
424	if (w->active < timercnt)	2310	ev_prepare_stop (EV_A_ &w->prepare);
425	{
426	timers [w->active - 1] = timers [--timercnt];
427	downheap (w->active - 1);
428	}
429		2311
430	ev_stop ((struct ev_watcher *)w);	2312	ev_stop (EV_A_ (W)w);
431	}	2313	}
		2314	#endif
432		2315
		2316	#if EV_FORK_ENABLE
433	void	2317	void
434	evsignal_start (struct ev_signal *w)	2318	ev_fork_start (EV_P_ ev_fork *w)
435	{	2319	{
436	if (ev_is_active (w))	2320	if (expect_false (ev_is_active (w)))
437	return;	2321	return;
438		2322
439	ev_start ((struct ev_watcher *)w, 1);	2323	ev_start (EV_A_ (W)w, ++forkcnt);
440	array_needsize (signals, signalmax, w->signum, signals_init);	2324	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
441	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2325	forks [forkcnt - 1] = w;
442	}	2326	}
443		2327
444	void	2328	void
445	evsignal_stop (struct ev_signal *w)	2329	ev_fork_stop (EV_P_ ev_fork *w)
446	{	2330	{
		2331	clear_pending (EV_A_ (W)w);
447	if (!ev_is_active (w))	2332	if (expect_false (!ev_is_active (w)))
448	return;	2333	return;
449		2334
450	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2335	{
451	ev_stop ((struct ev_watcher *)w);	2336	int active = ((W)w)->active;
		2337	forks [active - 1] = forks [--forkcnt];
		2338	((W)forks [active - 1])->active = active;
		2339	}
		2340
		2341	ev_stop (EV_A_ (W)w);
452	}	2342	}
		2343	#endif
453		2344
454	/*****************************************************************************/	2345	/*****************************************************************************/
455	#if 1	2346
		2347	struct ev_once
		2348	{
		2349	ev_io io;
		2350	ev_timer to;
		2351	void (*cb)(int revents, void *arg);
		2352	void *arg;
		2353	};
456		2354
457	static void	2355	static void
458	sin_cb (struct ev_io *w, int revents)	2356	once_cb (EV_P_ struct ev_once *once, int revents)
459	{	2357	{
460	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2358	void (*cb)(int revents, void *arg) = once->cb;
		2359	void *arg = once->arg;
		2360
		2361	ev_io_stop (EV_A_ &once->io);
		2362	ev_timer_stop (EV_A_ &once->to);
		2363	ev_free (once);
		2364
		2365	cb (revents, arg);
461	}	2366	}
462		2367
463	static void	2368	static void
		2369	once_cb_io (EV_P_ ev_io *w, int revents)
		2370	{
		2371	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2372	}
		2373
		2374	static void
464	ocb (struct ev_timer *w, int revents)	2375	once_cb_to (EV_P_ ev_timer *w, int revents)
465	{	2376	{
466	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2377	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
467	}	2378	}
468		2379
469	int main (void)	2380	void
		2381	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
470	{	2382	{
471	struct ev_io sin;	2383	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
472		2384
473	ev_init (0);	2385	if (expect_false (!once))
474
475	evw_init (&sin, sin_cb, 55);
476	evio_set (&sin, 0, EV_READ);
477	evio_start (&sin);
478
479	struct ev_timer t[1000];
480
481	int i;
482	for (i = 0; i < 1000; ++i)
483	{
484	struct ev_timer *w = t + i;
485	evw_init (w, ocb, i);
486	evtimer_set_rel (w, drand48 (), 0);
487	evtimer_start (w);
488	if (drand48 () < 0.5)
489	evtimer_stop (w);
490	}	2386	{
491		2387	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
492	ev_loop (0);
493
494	return 0;	2388	return;
495	}	2389	}
496		2390
497	#endif	2391	once->cb = cb;
		2392	once->arg = arg;
498		2393
		2394	ev_init (&once->io, once_cb_io);
		2395	if (fd >= 0)
		2396	{
		2397	ev_io_set (&once->io, fd, events);
		2398	ev_io_start (EV_A_ &once->io);
		2399	}
499		2400
		2401	ev_init (&once->to, once_cb_to);
		2402	if (timeout >= 0.)
		2403	{
		2404	ev_timer_set (&once->to, timeout, 0.);
		2405	ev_timer_start (EV_A_ &once->to);
		2406	}
		2407	}
500		2408
		2409	#if EV_MULTIPLICITY
		2410	#include "ev_wrap.h"
		2411	#endif
501		2412
		2413	#ifdef __cplusplus
		2414	}
		2415	#endif
		2416

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