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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 1.199 by root, Tue Dec 25 07:05:45 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 modifica-
		8	* tion, are permitted provided that the following conditions are met:
		9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	#ifndef EV_STANDALONE
		45	# ifdef EV_CONFIG_H
		46	# include EV_CONFIG_H
		47	# else
		48	# include "config.h"
		49	# endif
		50
		51	# if HAVE_CLOCK_GETTIME
		52	# ifndef EV_USE_MONOTONIC
		53	# define EV_USE_MONOTONIC 1
		54	# endif
		55	# ifndef EV_USE_REALTIME
		56	# define EV_USE_REALTIME 1
		57	# endif
		58	# else
		59	# ifndef EV_USE_MONOTONIC
		60	# define EV_USE_MONOTONIC 0
		61	# endif
		62	# ifndef EV_USE_REALTIME
		63	# define EV_USE_REALTIME 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_NANOSLEEP
		68	# if HAVE_NANOSLEEP
		69	# define EV_USE_NANOSLEEP 1
		70	# else
		71	# define EV_USE_NANOSLEEP 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_SELECT
		76	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		77	# define EV_USE_SELECT 1
		78	# else
		79	# define EV_USE_SELECT 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_POLL
		84	# if HAVE_POLL && HAVE_POLL_H
		85	# define EV_USE_POLL 1
		86	# else
		87	# define EV_USE_POLL 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_EPOLL
		92	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		93	# define EV_USE_EPOLL 1
		94	# else
		95	# define EV_USE_EPOLL 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_KQUEUE
		100	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		101	# define EV_USE_KQUEUE 1
		102	# else
		103	# define EV_USE_KQUEUE 0
		104	# endif
		105	# endif
		106
		107	# ifndef EV_USE_PORT
		108	# if HAVE_PORT_H && HAVE_PORT_CREATE
		109	# define EV_USE_PORT 1
		110	# else
		111	# define EV_USE_PORT 0
		112	# endif
		113	# endif
		114
		115	# ifndef EV_USE_INOTIFY
		116	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		117	# define EV_USE_INOTIFY 1
		118	# else
		119	# define EV_USE_INOTIFY 0
		120	# endif
		121	# endif
		122
		123	#endif
		124
1	#include <math.h>	125	#include <math.h>
2	#include <stdlib.h>	126	#include <stdlib.h>
		127	#include <fcntl.h>
		128	#include <stddef.h>
3		129
4	#include <stdio.h>	130	#include <stdio.h>
5		131
		132	#include <assert.h>
6	#include <errno.h>	133	#include <errno.h>
7	#include <sys/time.h>	134	#include <sys/types.h>
8	#include <time.h>	135	#include <time.h>
9		136
		137	#include <signal.h>
		138
		139	#ifdef EV_H
		140	# include EV_H
		141	#else
		142	# include "ev.h"
		143	#endif
		144
		145	#ifndef _WIN32
		146	# include <sys/time.h>
		147	# include <sys/wait.h>
		148	# include <unistd.h>
		149	#else
		150	# define WIN32_LEAN_AND_MEAN
		151	# include <windows.h>
		152	# ifndef EV_SELECT_IS_WINSOCKET
		153	# define EV_SELECT_IS_WINSOCKET 1
		154	# endif
		155	#endif
		156
		157	/**/
		158
		159	#ifndef EV_USE_MONOTONIC
		160	# define EV_USE_MONOTONIC 0
		161	#endif
		162
		163	#ifndef EV_USE_REALTIME
		164	# define EV_USE_REALTIME 0
		165	#endif
		166
		167	#ifndef EV_USE_NANOSLEEP
		168	# define EV_USE_NANOSLEEP 0
		169	#endif
		170
		171	#ifndef EV_USE_SELECT
		172	# define EV_USE_SELECT 1
		173	#endif
		174
		175	#ifndef EV_USE_POLL
		176	# ifdef _WIN32
		177	# define EV_USE_POLL 0
		178	# else
		179	# define EV_USE_POLL 1
		180	# endif
		181	#endif
		182
		183	#ifndef EV_USE_EPOLL
		184	# define EV_USE_EPOLL 0
		185	#endif
		186
		187	#ifndef EV_USE_KQUEUE
		188	# define EV_USE_KQUEUE 0
		189	#endif
		190
		191	#ifndef EV_USE_PORT
		192	# define EV_USE_PORT 0
		193	#endif
		194
		195	#ifndef EV_USE_INOTIFY
		196	# define EV_USE_INOTIFY 0
		197	#endif
		198
		199	#ifndef EV_PID_HASHSIZE
		200	# if EV_MINIMAL
		201	# define EV_PID_HASHSIZE 1
		202	# else
		203	# define EV_PID_HASHSIZE 16
		204	# endif
		205	#endif
		206
		207	#ifndef EV_INOTIFY_HASHSIZE
		208	# if EV_MINIMAL
		209	# define EV_INOTIFY_HASHSIZE 1
		210	# else
		211	# define EV_INOTIFY_HASHSIZE 16
		212	# endif
		213	#endif
		214
		215	/**/
		216
10	#ifdef CLOCK_MONOTONIC	217	#ifndef CLOCK_MONOTONIC
		218	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	219	# define EV_USE_MONOTONIC 0
		220	#endif
		221
		222	#ifndef CLOCK_REALTIME
		223	# undef EV_USE_REALTIME
		224	# define EV_USE_REALTIME 0
		225	#endif
		226
		227	#if !EV_STAT_ENABLE
		228	# undef EV_USE_INOTIFY
		229	# define EV_USE_INOTIFY 0
		230	#endif
		231
		232	#if !EV_USE_NANOSLEEP
		233	# ifndef _WIN32
		234	# include <sys/select.h>
12	#endif	235	# endif
		236	#endif
13		237
14	#define HAVE_EPOLL 1	238	#if EV_USE_INOTIFY
15	#define HAVE_REALTIME 1	239	# include <sys/inotify.h>
16	#define HAVE_SELECT 0	240	#endif
17		241
18	#define MAX_BLOCKTIME 60.	242	#if EV_SELECT_IS_WINSOCKET
		243	# include <winsock.h>
		244	#endif
19		245
		246	/**/
		247
		248	/*
		249	* This is used to avoid floating point rounding problems.
		250	* It is added to ev_rt_now when scheduling periodics
		251	* to ensure progress, time-wise, even when rounding
		252	* errors are against us.
		253	* This value is good at least till the year 4000.
		254	* Better solutions welcome.
		255	*/
		256	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		257
		258	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		259	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		260	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
		261
		262	#if __GNUC__ >= 4
		263	# define expect(expr,value) __builtin_expect ((expr),(value))
		264	# define noinline __attribute__ ((noinline))
		265	#else
		266	# define expect(expr,value) (expr)
		267	# define noinline
		268	# if __STDC_VERSION__ < 199901L
		269	# define inline
		270	# endif
		271	#endif
		272
		273	#define expect_false(expr) expect ((expr) != 0, 0)
		274	#define expect_true(expr) expect ((expr) != 0, 1)
		275	#define inline_size static inline
		276
		277	#if EV_MINIMAL
		278	# define inline_speed static noinline
		279	#else
		280	# define inline_speed static inline
		281	#endif
		282
		283	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		284	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		285
		286	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		287	#define EMPTY2(a,b) /* used to suppress some warnings */
		288
		289	typedef ev_watcher *W;
		290	typedef ev_watcher_list *WL;
		291	typedef ev_watcher_time *WT;
		292
		293	#if EV_USE_MONOTONIC
		294	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		295	/* giving it a reasonably high chance of working on typical architetcures */
		296	static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		297	#endif
		298
		299	#ifdef _WIN32
		300	# include "ev_win32.c"
		301	#endif
		302
		303	/*****************************************************************************/
		304
		305	static void (*syserr_cb)(const char *msg);
		306
		307	void
		308	ev_set_syserr_cb (void (*cb)(const char *msg))
		309	{
		310	syserr_cb = cb;
		311	}
		312
		313	static void noinline
		314	syserr (const char *msg)
		315	{
		316	if (!msg)
		317	msg = "(libev) system error";
		318
		319	if (syserr_cb)
		320	syserr_cb (msg);
		321	else
		322	{
		323	perror (msg);
		324	abort ();
		325	}
		326	}
		327
		328	static void *(*alloc)(void *ptr, long size);
		329
		330	void
		331	ev_set_allocator (void *(*cb)(void *ptr, long size))
		332	{
		333	alloc = cb;
		334	}
		335
		336	inline_speed void *
		337	ev_realloc (void *ptr, long size)
		338	{
		339	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		340
		341	if (!ptr && size)
		342	{
		343	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		344	abort ();
		345	}
		346
		347	return ptr;
		348	}
		349
		350	#define ev_malloc(size) ev_realloc (0, (size))
		351	#define ev_free(ptr) ev_realloc ((ptr), 0)
		352
		353	/*****************************************************************************/
		354
		355	typedef struct
		356	{
		357	WL head;
		358	unsigned char events;
		359	unsigned char reify;
		360	#if EV_SELECT_IS_WINSOCKET
		361	SOCKET handle;
		362	#endif
		363	} ANFD;
		364
		365	typedef struct
		366	{
		367	W w;
		368	int events;
		369	} ANPENDING;
		370
		371	#if EV_USE_INOTIFY
		372	typedef struct
		373	{
		374	WL head;
		375	} ANFS;
		376	#endif
		377
		378	#if EV_MULTIPLICITY
		379
		380	struct ev_loop
		381	{
		382	ev_tstamp ev_rt_now;
		383	#define ev_rt_now ((loop)->ev_rt_now)
		384	#define VAR(name,decl) decl;
		385	#include "ev_vars.h"
		386	#undef VAR
		387	};
20	#include "ev.h"	388	#include "ev_wrap.h"
21		389
22	struct ev_watcher {	390	static struct ev_loop default_loop_struct;
23	EV_WATCHER (ev_watcher);	391	struct ev_loop *ev_default_loop_ptr;
24	};
25		392
26	struct ev_watcher_list {	393	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		394
30	ev_tstamp ev_now;	395	ev_tstamp ev_rt_now;
31	int ev_method;	396	#define VAR(name,decl) static decl;
		397	#include "ev_vars.h"
		398	#undef VAR
32		399
33	static int have_monotonic; /* runtime */	400	static int ev_default_loop_ptr;
34		401
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	402	#endif
36	static void (*method_reify)(void);	403
37	static void (*method_poll)(ev_tstamp timeout);	404	/*****************************************************************************/
38		405
39	ev_tstamp	406	ev_tstamp
40	ev_time (void)	407	ev_time (void)
41	{	408	{
42	#if HAVE_REALTIME	409	#if EV_USE_REALTIME
43	struct timespec ts;	410	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	411	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	412	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	413	#else
47	struct timeval tv;	414	struct timeval tv;
48	gettimeofday (&tv, 0);	415	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	416	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	417	#endif
51	}	418	}
52		419
53	static ev_tstamp	420	ev_tstamp inline_size
54	get_clock (void)	421	get_clock (void)
55	{	422	{
56	#if HAVE_MONOTONIC	423	#if EV_USE_MONOTONIC
57	if (have_monotonic)	424	if (expect_true (have_monotonic))
58	{	425	{
59	struct timespec ts;	426	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	427	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	428	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	429	}
63	#endif	430	#endif
64		431
65	return ev_time ();	432	return ev_time ();
66	}	433	}
67		434
		435	#if EV_MULTIPLICITY
		436	ev_tstamp
		437	ev_now (EV_P)
		438	{
		439	return ev_rt_now;
		440	}
		441	#endif
		442
		443	void
		444	ev_sleep (ev_tstamp delay)
		445	{
		446	if (delay > 0.)
		447	{
		448	#if EV_USE_NANOSLEEP
		449	struct timespec ts;
		450
		451	ts.tv_sec = (time_t)delay;
		452	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		453
		454	nanosleep (&ts, 0);
		455	#elif defined(_WIN32)
		456	Sleep (delay * 1e3);
		457	#else
		458	struct timeval tv;
		459
		460	tv.tv_sec = (time_t)delay;
		461	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		462
		463	select (0, 0, 0, 0, &tv);
		464	#endif
		465	}
		466	}
		467
		468	/*****************************************************************************/
		469
		470	int inline_size
		471	array_nextsize (int elem, int cur, int cnt)
		472	{
		473	int ncur = cur + 1;
		474
		475	do
		476	ncur <<= 1;
		477	while (cnt > ncur);
		478
		479	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		480	if (elem * ncur > 4096)
		481	{
		482	ncur *= elem;
		483	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		484	ncur = ncur - sizeof (void *) * 4;
		485	ncur /= elem;
		486	}
		487
		488	return ncur;
		489	}
		490
		491	static noinline void *
		492	array_realloc (int elem, void *base, int *cur, int cnt)
		493	{
		494	*cur = array_nextsize (elem, *cur, cnt);
		495	return ev_realloc (base, elem * *cur);
		496	}
		497
68	#define array_needsize(base,cur,cnt,init) \	498	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	499	if (expect_false ((cnt) > (cur))) \
70	{ \	500	{ \
71	int newcnt = cur; \	501	int ocur_ = (cur); \
72	do \	502	(base) = (type *)array_realloc \
		503	(sizeof (type), (base), &(cur), (cnt)); \
		504	init ((base) + (ocur_), (cur) - ocur_); \
		505	}
		506
		507	#if 0
		508	#define array_slim(type,stem) \
		509	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
73	{ \	510	{ \
74	newcnt += (newcnt >> 1) + 16; \	511	stem ## max = array_roundsize (stem ## cnt >> 1); \
75	} \	512	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
76	while ((cnt) > newcnt); \	513	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
77	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	514	}
78	base = realloc (base, sizeof (*base) * (newcnt)); \	515	#endif
79	init (base + cur, newcnt - cur); \	516
80	cur = newcnt; \	517	#define array_free(stem, idx) \
		518	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		519
		520	/*****************************************************************************/
		521
		522	void noinline
		523	ev_feed_event (EV_P_ void *w, int revents)
		524	{
		525	W w_ = (W)w;
		526	int pri = ABSPRI (w_);
		527
		528	if (expect_false (w_->pending))
		529	pendings [pri][w_->pending - 1].events |= revents;
		530	else
		531	{
		532	w_->pending = ++pendingcnt [pri];
		533	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		534	pendings [pri][w_->pending - 1].w = w_;
		535	pendings [pri][w_->pending - 1].events = revents;
		536	}
		537	}
		538
		539	void inline_speed
		540	queue_events (EV_P_ W *events, int eventcnt, int type)
		541	{
		542	int i;
		543
		544	for (i = 0; i < eventcnt; ++i)
		545	ev_feed_event (EV_A_ events [i], type);
		546	}
		547
		548	/*****************************************************************************/
		549
		550	void inline_size
		551	anfds_init (ANFD *base, int count)
		552	{
		553	while (count--)
		554	{
		555	base->head = 0;
		556	base->events = EV_NONE;
		557	base->reify = 0;
		558
		559	++base;
		560	}
		561	}
		562
		563	void inline_speed
		564	fd_event (EV_P_ int fd, int revents)
		565	{
		566	ANFD *anfd = anfds + fd;
		567	ev_io *w;
		568
		569	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		570	{
		571	int ev = w->events & revents;
		572
		573	if (ev)
		574	ev_feed_event (EV_A_ (W)w, ev);
		575	}
		576	}
		577
		578	void
		579	ev_feed_fd_event (EV_P_ int fd, int revents)
		580	{
		581	if (fd >= 0 && fd < anfdmax)
		582	fd_event (EV_A_ fd, revents);
		583	}
		584
		585	void inline_size
		586	fd_reify (EV_P)
		587	{
		588	int i;
		589
		590	for (i = 0; i < fdchangecnt; ++i)
		591	{
		592	int fd = fdchanges [i];
		593	ANFD *anfd = anfds + fd;
		594	ev_io *w;
		595
		596	unsigned char events = 0;
		597
		598	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		599	events |= (unsigned char)w->events;
		600
		601	#if EV_SELECT_IS_WINSOCKET
		602	if (events)
		603	{
		604	unsigned long argp;
		605	anfd->handle = _get_osfhandle (fd);
		606	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		607	}
		608	#endif
		609
		610	{
		611	unsigned char o_events = anfd->events;
		612	unsigned char o_reify = anfd->reify;
		613
		614	anfd->reify = 0;
		615	anfd->events = events;
		616
		617	if (o_events != events || o_reify & EV_IOFDSET)
		618	backend_modify (EV_A_ fd, o_events, events);
81	}	619	}
		620	}
		621
		622	fdchangecnt = 0;
		623	}
		624
		625	void inline_size
		626	fd_change (EV_P_ int fd, int flags)
		627	{
		628	unsigned char reify = anfds [fd].reify;
		629	anfds [fd].reify |= flags;
		630
		631	if (expect_true (!reify))
		632	{
		633	++fdchangecnt;
		634	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		635	fdchanges [fdchangecnt - 1] = fd;
		636	}
		637	}
		638
		639	void inline_speed
		640	fd_kill (EV_P_ int fd)
		641	{
		642	ev_io *w;
		643
		644	while ((w = (ev_io *)anfds [fd].head))
		645	{
		646	ev_io_stop (EV_A_ w);
		647	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		648	}
		649	}
		650
		651	int inline_size
		652	fd_valid (int fd)
		653	{
		654	#ifdef _WIN32
		655	return _get_osfhandle (fd) != -1;
		656	#else
		657	return fcntl (fd, F_GETFD) != -1;
		658	#endif
		659	}
		660
		661	/* called on EBADF to verify fds */
		662	static void noinline
		663	fd_ebadf (EV_P)
		664	{
		665	int fd;
		666
		667	for (fd = 0; fd < anfdmax; ++fd)
		668	if (anfds [fd].events)
		669	if (!fd_valid (fd) == -1 && errno == EBADF)
		670	fd_kill (EV_A_ fd);
		671	}
		672
		673	/* called on ENOMEM in select/poll to kill some fds and retry */
		674	static void noinline
		675	fd_enomem (EV_P)
		676	{
		677	int fd;
		678
		679	for (fd = anfdmax; fd--; )
		680	if (anfds [fd].events)
		681	{
		682	fd_kill (EV_A_ fd);
		683	return;
		684	}
		685	}
		686
		687	/* usually called after fork if backend needs to re-arm all fds from scratch */
		688	static void noinline
		689	fd_rearm_all (EV_P)
		690	{
		691	int fd;
		692
		693	for (fd = 0; fd < anfdmax; ++fd)
		694	if (anfds [fd].events)
		695	{
		696	anfds [fd].events = 0;
		697	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		698	}
		699	}
		700
		701	/*****************************************************************************/
		702
		703	void inline_speed
		704	upheap (WT *heap, int k)
		705	{
		706	WT w = heap [k];
		707
		708	while (k)
		709	{
		710	int p = (k - 1) >> 1;
		711
		712	if (heap [p]->at <= w->at)
		713	break;
		714
		715	heap [k] = heap [p];
		716	((W)heap [k])->active = k + 1;
		717	k = p;
		718	}
		719
		720	heap [k] = w;
		721	((W)heap [k])->active = k + 1;
		722	}
		723
		724	void inline_speed
		725	downheap (WT *heap, int N, int k)
		726	{
		727	WT w = heap [k];
		728
		729	for (;;)
		730	{
		731	int c = (k << 1) + 1;
		732
		733	if (c >= N)
		734	break;
		735
		736	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		737	? 1 : 0;
		738
		739	if (w->at <= heap [c]->at)
		740	break;
		741
		742	heap [k] = heap [c];
		743	((W)heap [k])->active = k + 1;
		744
		745	k = c;
		746	}
		747
		748	heap [k] = w;
		749	((W)heap [k])->active = k + 1;
		750	}
		751
		752	void inline_size
		753	adjustheap (WT *heap, int N, int k)
		754	{
		755	upheap (heap, k);
		756	downheap (heap, N, k);
		757	}
		758
		759	/*****************************************************************************/
82		760
83	typedef struct	761	typedef struct
84	{	762	{
85	struct ev_io *head;	763	WL head;
86	unsigned char wev, rev; /* want, received event set */	764	sig_atomic_t volatile gotsig;
87	} ANFD;	765	} ANSIG;
88		766
89	static ANFD *anfds;	767	static ANSIG *signals;
90	static int anfdmax;	768	static int signalmax;
91		769
92	static int *fdchanges;	770	static int sigpipe [2];
93	static int fdchangemax, fdchangecnt;	771	static sig_atomic_t volatile gotsig;
		772	static ev_io sigev;
		773
		774	void inline_size
		775	signals_init (ANSIG *base, int count)
		776	{
		777	while (count--)
		778	{
		779	base->head = 0;
		780	base->gotsig = 0;
		781
		782	++base;
		783	}
		784	}
94		785
95	static void	786	static void
96	anfds_init (ANFD *base, int count)	787	sighandler (int signum)
97	{	788	{
98	while (count--)	789	#if _WIN32
99	{	790	signal (signum, sighandler);
100	base->head = 0;	791	#endif
101	base->wev = base->rev = EV_NONE;	792
102	++base;	793	signals [signum - 1].gotsig = 1;
		794
		795	if (!gotsig)
103	}	796	{
		797	int old_errno = errno;
		798	gotsig = 1;
		799	write (sigpipe [1], &signum, 1);
		800	errno = old_errno;
		801	}
104	}	802	}
105		803
106	typedef struct	804	void noinline
		805	ev_feed_signal_event (EV_P_ int signum)
107	{	806	{
108	struct ev_watcher *w;	807	WL w;
109	int events;
110	} ANPENDING;
111		808
112	static ANPENDING *pendings;	809	#if EV_MULTIPLICITY
113	static int pendingmax, pendingcnt;	810	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		811	#endif
		812
		813	--signum;
		814
		815	if (signum < 0 || signum >= signalmax)
		816	return;
		817
		818	signals [signum].gotsig = 0;
		819
		820	for (w = signals [signum].head; w; w = w->next)
		821	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		822	}
114		823
115	static void	824	static void
116	event (struct ev_watcher *w, int events)	825	sigcb (EV_P_ ev_io *iow, int revents)
117	{	826	{
118	w->pending = ++pendingcnt;	827	int signum;
119	array_needsize (pendings, pendingmax, pendingcnt, );	828
120	pendings [pendingcnt - 1].w = w;	829	read (sigpipe [0], &revents, 1);
121	pendings [pendingcnt - 1].events = events;	830	gotsig = 0;
		831
		832	for (signum = signalmax; signum--; )
		833	if (signals [signum].gotsig)
		834	ev_feed_signal_event (EV_A_ signum + 1);
122	}	835	}
		836
		837	void inline_speed
		838	fd_intern (int fd)
		839	{
		840	#ifdef _WIN32
		841	int arg = 1;
		842	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		843	#else
		844	fcntl (fd, F_SETFD, FD_CLOEXEC);
		845	fcntl (fd, F_SETFL, O_NONBLOCK);
		846	#endif
		847	}
		848
		849	static void noinline
		850	siginit (EV_P)
		851	{
		852	fd_intern (sigpipe [0]);
		853	fd_intern (sigpipe [1]);
		854
		855	ev_io_set (&sigev, sigpipe [0], EV_READ);
		856	ev_io_start (EV_A_ &sigev);
		857	ev_unref (EV_A); /* child watcher should not keep loop alive */
		858	}
		859
		860	/*****************************************************************************/
		861
		862	static WL childs [EV_PID_HASHSIZE];
		863
		864	#ifndef _WIN32
		865
		866	static ev_signal childev;
		867
		868	void inline_speed
		869	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		870	{
		871	ev_child *w;
		872
		873	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		874	if (w->pid == pid || !w->pid)
		875	{
		876	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		877	w->rpid = pid;
		878	w->rstatus = status;
		879	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		880	}
		881	}
		882
		883	#ifndef WCONTINUED
		884	# define WCONTINUED 0
		885	#endif
123		886
124	static void	887	static void
125	fd_event (int fd, int events)	888	childcb (EV_P_ ev_signal *sw, int revents)
126	{	889	{
127	ANFD *anfd = anfds + fd;	890	int pid, status;
128	struct ev_io *w;
129		891
130	for (w = anfd->head; w; w = w->next)	892	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
131	{	893	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
132	int ev = w->events & events;	894	if (!WCONTINUED
		895	|| errno != EINVAL
		896	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		897	return;
133		898
134	if (ev)	899	/* make sure we are called again until all childs have been reaped */
135	event ((struct ev_watcher *)w, ev);	900	/* we need to do it this way so that the callback gets called before we continue */
136	}	901	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
137	}
138		902
139	static struct ev_timer **timers;	903	child_reap (EV_A_ sw, pid, pid, status);
140	static int timermax, timercnt;	904	if (EV_PID_HASHSIZE > 1)
141		905	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	}	906	}
158		907
159	static void	908	#endif
160	downheap (int k)
161	{
162	struct ev_timer *w = timers [k];
163		909
164	while (k <= (timercnt >> 1))	910	/*****************************************************************************/
165	{
166	int j = k << 1;
167		911
168	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	912	#if EV_USE_PORT
169	++j;	913	# include "ev_port.c"
170		914	#endif
171	if (w->at <= timers [j]->at)	915	#if EV_USE_KQUEUE
172	break;	916	# include "ev_kqueue.c"
173		917	#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	918	#if EV_USE_EPOLL
194	# include "ev_epoll.c"	919	# include "ev_epoll.c"
195	#endif	920	#endif
		921	#if EV_USE_POLL
		922	# include "ev_poll.c"
		923	#endif
196	#if HAVE_SELECT	924	#if EV_USE_SELECT
197	# include "ev_select.c"	925	# include "ev_select.c"
198	#endif	926	#endif
199		927
200	int ev_init (int flags)	928	int
		929	ev_version_major (void)
201	{	930	{
		931	return EV_VERSION_MAJOR;
		932	}
		933
		934	int
		935	ev_version_minor (void)
		936	{
		937	return EV_VERSION_MINOR;
		938	}
		939
		940	/* return true if we are running with elevated privileges and should ignore env variables */
		941	int inline_size
		942	enable_secure (void)
		943	{
		944	#ifdef _WIN32
		945	return 0;
		946	#else
		947	return getuid () != geteuid ()
		948	|| getgid () != getegid ();
		949	#endif
		950	}
		951
		952	unsigned int
		953	ev_supported_backends (void)
		954	{
		955	unsigned int flags = 0;
		956
		957	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		958	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		959	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		960	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		961	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		962
		963	return flags;
		964	}
		965
		966	unsigned int
		967	ev_recommended_backends (void)
		968	{
		969	unsigned int flags = ev_supported_backends ();
		970
		971	#ifndef __NetBSD__
		972	/* kqueue is borked on everything but netbsd apparently */
		973	/* it usually doesn't work correctly on anything but sockets and pipes */
		974	flags &= ~EVBACKEND_KQUEUE;
		975	#endif
		976	#ifdef __APPLE__
		977	// flags &= ~EVBACKEND_KQUEUE; for documentation
		978	flags &= ~EVBACKEND_POLL;
		979	#endif
		980
		981	return flags;
		982	}
		983
		984	unsigned int
		985	ev_embeddable_backends (void)
		986	{
		987	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		988
		989	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		990	/* please fix it and tell me how to detect the fix */
		991	flags &= ~EVBACKEND_EPOLL;
		992
		993	return flags;
		994	}
		995
		996	unsigned int
		997	ev_backend (EV_P)
		998	{
		999	return backend;
		1000	}
		1001
		1002	unsigned int
		1003	ev_loop_count (EV_P)
		1004	{
		1005	return loop_count;
		1006	}
		1007
		1008	void
		1009	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1010	{
		1011	io_blocktime = interval;
		1012	}
		1013
		1014	void
		1015	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1016	{
		1017	timeout_blocktime = interval;
		1018	}
		1019
		1020	static void noinline
		1021	loop_init (EV_P_ unsigned int flags)
		1022	{
		1023	if (!backend)
		1024	{
202	#if HAVE_MONOTONIC	1025	#if EV_USE_MONOTONIC
203	{	1026	{
204	struct timespec ts;	1027	struct timespec ts;
205	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1028	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
206	have_monotonic = 1;	1029	have_monotonic = 1;
207	}	1030	}
208	#endif	1031	#endif
209		1032
210	ev_now = ev_time ();	1033	ev_rt_now = ev_time ();
		1034	mn_now = get_clock ();
		1035	now_floor = mn_now;
		1036	rtmn_diff = ev_rt_now - mn_now;
211		1037
		1038	io_blocktime = 0.;
		1039	timeout_blocktime = 0.;
		1040
		1041	/* pid check not overridable via env */
		1042	#ifndef _WIN32
		1043	if (flags & EVFLAG_FORKCHECK)
		1044	curpid = getpid ();
		1045	#endif
		1046
		1047	if (!(flags & EVFLAG_NOENV)
		1048	&& !enable_secure ()
		1049	&& getenv ("LIBEV_FLAGS"))
		1050	flags = atoi (getenv ("LIBEV_FLAGS"));
		1051
		1052	if (!(flags & 0x0000ffffUL))
		1053	flags |= ev_recommended_backends ();
		1054
		1055	backend = 0;
		1056	backend_fd = -1;
		1057	#if EV_USE_INOTIFY
		1058	fs_fd = -2;
		1059	#endif
		1060
		1061	#if EV_USE_PORT
		1062	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1063	#endif
		1064	#if EV_USE_KQUEUE
		1065	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1066	#endif
212	#if HAVE_EPOLL	1067	#if EV_USE_EPOLL
213	if (epoll_init (flags))	1068	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
214	return ev_method;
215	#endif	1069	#endif
		1070	#if EV_USE_POLL
		1071	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1072	#endif
216	#if HAVE_SELECT	1073	#if EV_USE_SELECT
217	if (select_init (flags))	1074	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
218	return ev_method;
219	#endif	1075	#endif
220		1076
221	ev_method = EVMETHOD_NONE;	1077	ev_init (&sigev, sigcb);
222	return ev_method;	1078	ev_set_priority (&sigev, EV_MAXPRI);
		1079	}
223	}	1080	}
224		1081
225	void ev_prefork (void)	1082	static void noinline
226	{	1083	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	{	1084	{
243	int i;	1085	int i;
244		1086
245	for (i = 0; i < pendingcnt; ++i)	1087	#if EV_USE_INOTIFY
		1088	if (fs_fd >= 0)
		1089	close (fs_fd);
		1090	#endif
		1091
		1092	if (backend_fd >= 0)
		1093	close (backend_fd);
		1094
		1095	#if EV_USE_PORT
		1096	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1097	#endif
		1098	#if EV_USE_KQUEUE
		1099	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1100	#endif
		1101	#if EV_USE_EPOLL
		1102	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1103	#endif
		1104	#if EV_USE_POLL
		1105	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1106	#endif
		1107	#if EV_USE_SELECT
		1108	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1109	#endif
		1110
		1111	for (i = NUMPRI; i--; )
		1112	{
		1113	array_free (pending, [i]);
		1114	#if EV_IDLE_ENABLE
		1115	array_free (idle, [i]);
		1116	#endif
246	{	1117	}
247	ANPENDING *p = pendings + i;
248		1118
249	if (p->w)	1119	ev_free (anfds); anfdmax = 0;
		1120
		1121	/* have to use the microsoft-never-gets-it-right macro */
		1122	array_free (fdchange, EMPTY);
		1123	array_free (timer, EMPTY);
		1124	#if EV_PERIODIC_ENABLE
		1125	array_free (periodic, EMPTY);
		1126	#endif
		1127	#if EV_FORK_ENABLE
		1128	array_free (fork, EMPTY);
		1129	#endif
		1130	array_free (prepare, EMPTY);
		1131	array_free (check, EMPTY);
		1132
		1133	backend = 0;
		1134	}
		1135
		1136	void inline_size infy_fork (EV_P);
		1137
		1138	void inline_size
		1139	loop_fork (EV_P)
		1140	{
		1141	#if EV_USE_PORT
		1142	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1143	#endif
		1144	#if EV_USE_KQUEUE
		1145	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1146	#endif
		1147	#if EV_USE_EPOLL
		1148	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1149	#endif
		1150	#if EV_USE_INOTIFY
		1151	infy_fork (EV_A);
		1152	#endif
		1153
		1154	if (ev_is_active (&sigev))
		1155	{
		1156	/* default loop */
		1157
		1158	ev_ref (EV_A);
		1159	ev_io_stop (EV_A_ &sigev);
		1160	close (sigpipe [0]);
		1161	close (sigpipe [1]);
		1162
		1163	while (pipe (sigpipe))
		1164	syserr ("(libev) error creating pipe");
		1165
		1166	siginit (EV_A);
		1167	}
		1168
		1169	postfork = 0;
		1170	}
		1171
		1172	#if EV_MULTIPLICITY
		1173	struct ev_loop *
		1174	ev_loop_new (unsigned int flags)
		1175	{
		1176	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1177
		1178	memset (loop, 0, sizeof (struct ev_loop));
		1179
		1180	loop_init (EV_A_ flags);
		1181
		1182	if (ev_backend (EV_A))
		1183	return loop;
		1184
		1185	return 0;
		1186	}
		1187
		1188	void
		1189	ev_loop_destroy (EV_P)
		1190	{
		1191	loop_destroy (EV_A);
		1192	ev_free (loop);
		1193	}
		1194
		1195	void
		1196	ev_loop_fork (EV_P)
		1197	{
		1198	postfork = 1;
		1199	}
		1200
		1201	#endif
		1202
		1203	#if EV_MULTIPLICITY
		1204	struct ev_loop *
		1205	ev_default_loop_init (unsigned int flags)
		1206	#else
		1207	int
		1208	ev_default_loop (unsigned int flags)
		1209	#endif
		1210	{
		1211	if (sigpipe [0] == sigpipe [1])
		1212	if (pipe (sigpipe))
		1213	return 0;
		1214
		1215	if (!ev_default_loop_ptr)
		1216	{
		1217	#if EV_MULTIPLICITY
		1218	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1219	#else
		1220	ev_default_loop_ptr = 1;
		1221	#endif
		1222
		1223	loop_init (EV_A_ flags);
		1224
		1225	if (ev_backend (EV_A))
250	{	1226	{
251	p->w->pending = 0;	1227	siginit (EV_A);
252	p->w->cb (p->w, p->events);	1228
		1229	#ifndef _WIN32
		1230	ev_signal_init (&childev, childcb, SIGCHLD);
		1231	ev_set_priority (&childev, EV_MAXPRI);
		1232	ev_signal_start (EV_A_ &childev);
		1233	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1234	#endif
253	}	1235	}
		1236	else
		1237	ev_default_loop_ptr = 0;
		1238	}
		1239
		1240	return ev_default_loop_ptr;
		1241	}
		1242
		1243	void
		1244	ev_default_destroy (void)
		1245	{
		1246	#if EV_MULTIPLICITY
		1247	struct ev_loop *loop = ev_default_loop_ptr;
		1248	#endif
		1249
		1250	#ifndef _WIN32
		1251	ev_ref (EV_A); /* child watcher */
		1252	ev_signal_stop (EV_A_ &childev);
		1253	#endif
		1254
		1255	ev_ref (EV_A); /* signal watcher */
		1256	ev_io_stop (EV_A_ &sigev);
		1257
		1258	close (sigpipe [0]); sigpipe [0] = 0;
		1259	close (sigpipe [1]); sigpipe [1] = 0;
		1260
		1261	loop_destroy (EV_A);
		1262	}
		1263
		1264	void
		1265	ev_default_fork (void)
		1266	{
		1267	#if EV_MULTIPLICITY
		1268	struct ev_loop *loop = ev_default_loop_ptr;
		1269	#endif
		1270
		1271	if (backend)
		1272	postfork = 1;
		1273	}
		1274
		1275	/*****************************************************************************/
		1276
		1277	void
		1278	ev_invoke (EV_P_ void *w, int revents)
		1279	{
		1280	EV_CB_INVOKE ((W)w, revents);
		1281	}
		1282
		1283	void inline_speed
		1284	call_pending (EV_P)
		1285	{
		1286	int pri;
		1287
		1288	for (pri = NUMPRI; pri--; )
		1289	while (pendingcnt [pri])
		1290	{
		1291	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1292
		1293	if (expect_true (p->w))
		1294	{
		1295	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1296
		1297	p->w->pending = 0;
		1298	EV_CB_INVOKE (p->w, p->events);
		1299	}
254	}	1300	}
255
256	pendingcnt = 0;
257	}	1301	}
258		1302
259	static void	1303	void inline_size
260	timer_reify (void)	1304	timers_reify (EV_P)
261	{	1305	{
262	while (timercnt && timers [0]->at <= ev_now)	1306	while (timercnt && ((WT)timers [0])->at <= mn_now)
263	{	1307	{
264	struct ev_timer *w = timers [0];	1308	ev_timer *w = (ev_timer *)timers [0];
265		1309
		1310	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1311
266	/* first reschedule timer */	1312	/* first reschedule or stop timer */
267	if (w->repeat)	1313	if (w->repeat)
268	{	1314	{
269	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	1315	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
270	if (w->is_abs)	1316
271	w->at += floor ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
272	else
273	w->at = ev_now + w->repeat;	1317	((WT)w)->at += w->repeat;
		1318	if (((WT)w)->at < mn_now)
		1319	((WT)w)->at = mn_now;
274		1320
275	fprintf (stderr, "b %f\n", w->at);//D	1321	downheap (timers, timercnt, 0);
276
277	downheap (0);
278	}	1322	}
279	else	1323	else
280	evtimer_stop (w); /* nonrepeating: stop timer */	1324	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
281		1325
282	event ((struct ev_watcher *)w, EV_TIMEOUT);	1326	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1327	}
		1328	}
		1329
		1330	#if EV_PERIODIC_ENABLE
		1331	void inline_size
		1332	periodics_reify (EV_P)
		1333	{
		1334	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
283	}	1335	{
284	}	1336	ev_periodic *w = (ev_periodic *)periodics [0];
285		1337
286	int ev_loop_done;	1338	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
287		1339
		1340	/* first reschedule or stop timer */
		1341	if (w->reschedule_cb)
		1342	{
		1343	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1344	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1345	downheap (periodics, periodiccnt, 0);
		1346	}
		1347	else if (w->interval)
		1348	{
		1349	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1350	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1351	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1352	downheap (periodics, periodiccnt, 0);
		1353	}
		1354	else
		1355	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1356
		1357	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1358	}
		1359	}
		1360
		1361	static void noinline
		1362	periodics_reschedule (EV_P)
		1363	{
		1364	int i;
		1365
		1366	/* adjust periodics after time jump */
		1367	for (i = 0; i < periodiccnt; ++i)
		1368	{
		1369	ev_periodic *w = (ev_periodic *)periodics [i];
		1370
		1371	if (w->reschedule_cb)
		1372	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1373	else if (w->interval)
		1374	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1375	}
		1376
		1377	/* now rebuild the heap */
		1378	for (i = periodiccnt >> 1; i--; )
		1379	downheap (periodics, periodiccnt, i);
		1380	}
		1381	#endif
		1382
		1383	#if EV_IDLE_ENABLE
		1384	void inline_size
		1385	idle_reify (EV_P)
		1386	{
		1387	if (expect_false (idleall))
		1388	{
		1389	int pri;
		1390
		1391	for (pri = NUMPRI; pri--; )
		1392	{
		1393	if (pendingcnt [pri])
		1394	break;
		1395
		1396	if (idlecnt [pri])
		1397	{
		1398	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1399	break;
		1400	}
		1401	}
		1402	}
		1403	}
		1404	#endif
		1405
		1406	void inline_speed
		1407	time_update (EV_P_ ev_tstamp max_block)
		1408	{
		1409	int i;
		1410
		1411	#if EV_USE_MONOTONIC
		1412	if (expect_true (have_monotonic))
		1413	{
		1414	ev_tstamp odiff = rtmn_diff;
		1415
		1416	mn_now = get_clock ();
		1417
		1418	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1419	/* interpolate in the meantime */
		1420	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1421	{
		1422	ev_rt_now = rtmn_diff + mn_now;
		1423	return;
		1424	}
		1425
		1426	now_floor = mn_now;
		1427	ev_rt_now = ev_time ();
		1428
		1429	/* loop a few times, before making important decisions.
		1430	* on the choice of "4": one iteration isn't enough,
		1431	* in case we get preempted during the calls to
		1432	* ev_time and get_clock. a second call is almost guaranteed
		1433	* to succeed in that case, though. and looping a few more times
		1434	* doesn't hurt either as we only do this on time-jumps or
		1435	* in the unlikely event of having been preempted here.
		1436	*/
		1437	for (i = 4; --i; )
		1438	{
		1439	rtmn_diff = ev_rt_now - mn_now;
		1440
		1441	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1442	return; /* all is well */
		1443
		1444	ev_rt_now = ev_time ();
		1445	mn_now = get_clock ();
		1446	now_floor = mn_now;
		1447	}
		1448
		1449	# if EV_PERIODIC_ENABLE
		1450	periodics_reschedule (EV_A);
		1451	# endif
		1452	/* no timer adjustment, as the monotonic clock doesn't jump */
		1453	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1454	}
		1455	else
		1456	#endif
		1457	{
		1458	ev_rt_now = ev_time ();
		1459
		1460	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1461	{
		1462	#if EV_PERIODIC_ENABLE
		1463	periodics_reschedule (EV_A);
		1464	#endif
		1465	/* adjust timers. this is easy, as the offset is the same for all of them */
		1466	for (i = 0; i < timercnt; ++i)
		1467	((WT)timers [i])->at += ev_rt_now - mn_now;
		1468	}
		1469
		1470	mn_now = ev_rt_now;
		1471	}
		1472	}
		1473
		1474	void
		1475	ev_ref (EV_P)
		1476	{
		1477	++activecnt;
		1478	}
		1479
		1480	void
		1481	ev_unref (EV_P)
		1482	{
		1483	--activecnt;
		1484	}
		1485
		1486	static int loop_done;
		1487
		1488	void
288	int ev_loop (int flags)	1489	ev_loop (EV_P_ int flags)
289	{	1490	{
290	double block;
291	ev_loop_done = flags & EVLOOP_ONESHOT;	1491	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1492	? EVUNLOOP_ONE
		1493	: EVUNLOOP_CANCEL;
		1494
		1495	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
292		1496
293	do	1497	do
294	{	1498	{
		1499	#ifndef _WIN32
		1500	if (expect_false (curpid)) /* penalise the forking check even more */
		1501	if (expect_false (getpid () != curpid))
		1502	{
		1503	curpid = getpid ();
		1504	postfork = 1;
		1505	}
		1506	#endif
		1507
		1508	#if EV_FORK_ENABLE
		1509	/* we might have forked, so queue fork handlers */
		1510	if (expect_false (postfork))
		1511	if (forkcnt)
		1512	{
		1513	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1514	call_pending (EV_A);
		1515	}
		1516	#endif
		1517
		1518	/* queue prepare watchers (and execute them) */
		1519	if (expect_false (preparecnt))
		1520	{
		1521	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1522	call_pending (EV_A);
		1523	}
		1524
		1525	if (expect_false (!activecnt))
		1526	break;
		1527
		1528	/* we might have forked, so reify kernel state if necessary */
		1529	if (expect_false (postfork))
		1530	loop_fork (EV_A);
		1531
295	/* update fd-related kernel structures */	1532	/* update fd-related kernel structures */
296	method_reify (); fdchangecnt = 0;	1533	fd_reify (EV_A);
297		1534
298	/* calculate blocking time */	1535	/* calculate blocking time */
299	ev_now = ev_time ();	1536	{
		1537	ev_tstamp waittime = 0.;
		1538	ev_tstamp sleeptime = 0.;
300		1539
301	if (flags & EVLOOP_NONBLOCK)	1540	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
302	block = 0.;
303	else if (!timercnt)
304	block = MAX_BLOCKTIME;
305	else
306	{	1541	{
307	block = timers [0]->at - ev_now + method_fudge;	1542	/* update time to cancel out callback processing overhead */
308	if (block < 0.) block = 0.;	1543	time_update (EV_A_ 1e100);
309	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;	1544
		1545	waittime = MAX_BLOCKTIME;
		1546
		1547	if (timercnt)
		1548	{
		1549	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
		1550	if (waittime > to) waittime = to;
		1551	}
		1552
		1553	#if EV_PERIODIC_ENABLE
		1554	if (periodiccnt)
		1555	{
		1556	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
		1557	if (waittime > to) waittime = to;
		1558	}
		1559	#endif
		1560
		1561	if (expect_false (waittime < timeout_blocktime))
		1562	waittime = timeout_blocktime;
		1563
		1564	sleeptime = waittime - backend_fudge;
		1565
		1566	if (expect_true (sleeptime > io_blocktime))
		1567	sleeptime = io_blocktime;
		1568
		1569	if (sleeptime)
		1570	{
		1571	ev_sleep (sleeptime);
		1572	waittime -= sleeptime;
		1573	}
310	}	1574	}
311		1575
312	fprintf (stderr, "block %f\n", block);//D	1576	++loop_count;
313	method_poll (block);	1577	backend_poll (EV_A_ waittime);
314		1578
		1579	/* update ev_rt_now, do magic */
		1580	time_update (EV_A_ waittime + sleeptime);
		1581	}
		1582
315	/* put pending timers into pendign queue and reschedule them */	1583	/* queue pending timers and reschedule them */
		1584	timers_reify (EV_A); /* relative timers called last */
		1585	#if EV_PERIODIC_ENABLE
		1586	periodics_reify (EV_A); /* absolute timers called first */
		1587	#endif
		1588
		1589	#if EV_IDLE_ENABLE
		1590	/* queue idle watchers unless other events are pending */
316	timer_reify ();	1591	idle_reify (EV_A);
		1592	#endif
317		1593
318	ev_now = ev_time ();	1594	/* queue check watchers, to be executed first */
		1595	if (expect_false (checkcnt))
		1596	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1597
319	call_pending ();	1598	call_pending (EV_A);
320	}
321	while (!ev_loop_done);
322	}
323		1599
324	static void	1600	}
325	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1601	while (expect_true (activecnt && !loop_done));
		1602
		1603	if (loop_done == EVUNLOOP_ONE)
		1604	loop_done = EVUNLOOP_CANCEL;
		1605	}
		1606
		1607	void
		1608	ev_unloop (EV_P_ int how)
		1609	{
		1610	loop_done = how;
		1611	}
		1612
		1613	/*****************************************************************************/
		1614
		1615	void inline_size
		1616	wlist_add (WL *head, WL elem)
326	{	1617	{
327	elem->next = *head;	1618	elem->next = *head;
328	*head = elem;	1619	*head = elem;
329	}	1620	}
330		1621
331	static void	1622	void inline_size
332	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1623	wlist_del (WL *head, WL elem)
333	{	1624	{
334	while (*head)	1625	while (*head)
335	{	1626	{
336	if (*head == elem)	1627	if (*head == elem)
337	{	1628	{
…		…
341		1632
342	head = &(*head)->next;	1633	head = &(*head)->next;
343	}	1634	}
344	}	1635	}
345		1636
		1637	void inline_speed
		1638	clear_pending (EV_P_ W w)
		1639	{
		1640	if (w->pending)
		1641	{
		1642	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1643	w->pending = 0;
		1644	}
		1645	}
		1646
		1647	int
		1648	ev_clear_pending (EV_P_ void *w)
		1649	{
		1650	W w_ = (W)w;
		1651	int pending = w_->pending;
		1652
		1653	if (expect_true (pending))
		1654	{
		1655	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1656	w_->pending = 0;
		1657	p->w = 0;
		1658	return p->events;
		1659	}
		1660	else
		1661	return 0;
		1662	}
		1663
		1664	void inline_size
		1665	pri_adjust (EV_P_ W w)
		1666	{
		1667	int pri = w->priority;
		1668	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1669	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1670	w->priority = pri;
		1671	}
		1672
		1673	void inline_speed
		1674	ev_start (EV_P_ W w, int active)
		1675	{
		1676	pri_adjust (EV_A_ w);
		1677	w->active = active;
		1678	ev_ref (EV_A);
		1679	}
		1680
		1681	void inline_size
		1682	ev_stop (EV_P_ W w)
		1683	{
		1684	ev_unref (EV_A);
		1685	w->active = 0;
		1686	}
		1687
		1688	/*****************************************************************************/
		1689
		1690	void noinline
		1691	ev_io_start (EV_P_ ev_io *w)
		1692	{
		1693	int fd = w->fd;
		1694
		1695	if (expect_false (ev_is_active (w)))
		1696	return;
		1697
		1698	assert (("ev_io_start called with negative fd", fd >= 0));
		1699
		1700	ev_start (EV_A_ (W)w, 1);
		1701	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1702	wlist_add (&anfds[fd].head, (WL)w);
		1703
		1704	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1705	w->events &= ~EV_IOFDSET;
		1706	}
		1707
		1708	void noinline
		1709	ev_io_stop (EV_P_ ev_io *w)
		1710	{
		1711	clear_pending (EV_A_ (W)w);
		1712	if (expect_false (!ev_is_active (w)))
		1713	return;
		1714
		1715	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1716
		1717	wlist_del (&anfds[w->fd].head, (WL)w);
		1718	ev_stop (EV_A_ (W)w);
		1719
		1720	fd_change (EV_A_ w->fd, 1);
		1721	}
		1722
		1723	void noinline
		1724	ev_timer_start (EV_P_ ev_timer *w)
		1725	{
		1726	if (expect_false (ev_is_active (w)))
		1727	return;
		1728
		1729	((WT)w)->at += mn_now;
		1730
		1731	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1732
		1733	ev_start (EV_A_ (W)w, ++timercnt);
		1734	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1735	timers [timercnt - 1] = (WT)w;
		1736	upheap (timers, timercnt - 1);
		1737
		1738	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1739	}
		1740
		1741	void noinline
		1742	ev_timer_stop (EV_P_ ev_timer *w)
		1743	{
		1744	clear_pending (EV_A_ (W)w);
		1745	if (expect_false (!ev_is_active (w)))
		1746	return;
		1747
		1748	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1749
		1750	{
		1751	int active = ((W)w)->active;
		1752
		1753	if (expect_true (--active < --timercnt))
		1754	{
		1755	timers [active] = timers [timercnt];
		1756	adjustheap (timers, timercnt, active);
		1757	}
		1758	}
		1759
		1760	((WT)w)->at -= mn_now;
		1761
		1762	ev_stop (EV_A_ (W)w);
		1763	}
		1764
		1765	void noinline
		1766	ev_timer_again (EV_P_ ev_timer *w)
		1767	{
		1768	if (ev_is_active (w))
		1769	{
		1770	if (w->repeat)
		1771	{
		1772	((WT)w)->at = mn_now + w->repeat;
		1773	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1774	}
		1775	else
		1776	ev_timer_stop (EV_A_ w);
		1777	}
		1778	else if (w->repeat)
		1779	{
		1780	w->at = w->repeat;
		1781	ev_timer_start (EV_A_ w);
		1782	}
		1783	}
		1784
		1785	#if EV_PERIODIC_ENABLE
		1786	void noinline
		1787	ev_periodic_start (EV_P_ ev_periodic *w)
		1788	{
		1789	if (expect_false (ev_is_active (w)))
		1790	return;
		1791
		1792	if (w->reschedule_cb)
		1793	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1794	else if (w->interval)
		1795	{
		1796	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1797	/* this formula differs from the one in periodic_reify because we do not always round up */
		1798	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1799	}
		1800	else
		1801	((WT)w)->at = w->offset;
		1802
		1803	ev_start (EV_A_ (W)w, ++periodiccnt);
		1804	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
		1805	periodics [periodiccnt - 1] = (WT)w;
		1806	upheap (periodics, periodiccnt - 1);
		1807
		1808	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1809	}
		1810
		1811	void noinline
		1812	ev_periodic_stop (EV_P_ ev_periodic *w)
		1813	{
		1814	clear_pending (EV_A_ (W)w);
		1815	if (expect_false (!ev_is_active (w)))
		1816	return;
		1817
		1818	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1819
		1820	{
		1821	int active = ((W)w)->active;
		1822
		1823	if (expect_true (--active < --periodiccnt))
		1824	{
		1825	periodics [active] = periodics [periodiccnt];
		1826	adjustheap (periodics, periodiccnt, active);
		1827	}
		1828	}
		1829
		1830	ev_stop (EV_A_ (W)w);
		1831	}
		1832
		1833	void noinline
		1834	ev_periodic_again (EV_P_ ev_periodic *w)
		1835	{
		1836	/* TODO: use adjustheap and recalculation */
		1837	ev_periodic_stop (EV_A_ w);
		1838	ev_periodic_start (EV_A_ w);
		1839	}
		1840	#endif
		1841
		1842	#ifndef SA_RESTART
		1843	# define SA_RESTART 0
		1844	#endif
		1845
		1846	void noinline
		1847	ev_signal_start (EV_P_ ev_signal *w)
		1848	{
		1849	#if EV_MULTIPLICITY
		1850	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1851	#endif
		1852	if (expect_false (ev_is_active (w)))
		1853	return;
		1854
		1855	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1856
		1857	{
		1858	#ifndef _WIN32
		1859	sigset_t full, prev;
		1860	sigfillset (&full);
		1861	sigprocmask (SIG_SETMASK, &full, &prev);
		1862	#endif
		1863
		1864	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1865
		1866	#ifndef _WIN32
		1867	sigprocmask (SIG_SETMASK, &prev, 0);
		1868	#endif
		1869	}
		1870
		1871	ev_start (EV_A_ (W)w, 1);
		1872	wlist_add (&signals [w->signum - 1].head, (WL)w);
		1873
		1874	if (!((WL)w)->next)
		1875	{
		1876	#if _WIN32
		1877	signal (w->signum, sighandler);
		1878	#else
		1879	struct sigaction sa;
		1880	sa.sa_handler = sighandler;
		1881	sigfillset (&sa.sa_mask);
		1882	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1883	sigaction (w->signum, &sa, 0);
		1884	#endif
		1885	}
		1886	}
		1887
		1888	void noinline
		1889	ev_signal_stop (EV_P_ ev_signal *w)
		1890	{
		1891	clear_pending (EV_A_ (W)w);
		1892	if (expect_false (!ev_is_active (w)))
		1893	return;
		1894
		1895	wlist_del (&signals [w->signum - 1].head, (WL)w);
		1896	ev_stop (EV_A_ (W)w);
		1897
		1898	if (!signals [w->signum - 1].head)
		1899	signal (w->signum, SIG_DFL);
		1900	}
		1901
		1902	void
		1903	ev_child_start (EV_P_ ev_child *w)
		1904	{
		1905	#if EV_MULTIPLICITY
		1906	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1907	#endif
		1908	if (expect_false (ev_is_active (w)))
		1909	return;
		1910
		1911	ev_start (EV_A_ (W)w, 1);
		1912	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1913	}
		1914
		1915	void
		1916	ev_child_stop (EV_P_ ev_child *w)
		1917	{
		1918	clear_pending (EV_A_ (W)w);
		1919	if (expect_false (!ev_is_active (w)))
		1920	return;
		1921
		1922	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1923	ev_stop (EV_A_ (W)w);
		1924	}
		1925
		1926	#if EV_STAT_ENABLE
		1927
		1928	# ifdef _WIN32
		1929	# undef lstat
		1930	# define lstat(a,b) _stati64 (a,b)
		1931	# endif
		1932
		1933	#define DEF_STAT_INTERVAL 5.0074891
		1934	#define MIN_STAT_INTERVAL 0.1074891
		1935
		1936	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1937
		1938	#if EV_USE_INOTIFY
		1939	# define EV_INOTIFY_BUFSIZE 8192
		1940
		1941	static void noinline
		1942	infy_add (EV_P_ ev_stat *w)
		1943	{
		1944	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);
		1945
		1946	if (w->wd < 0)
		1947	{
		1948	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1949
		1950	/* monitor some parent directory for speedup hints */
		1951	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1952	{
		1953	char path [4096];
		1954	strcpy (path, w->path);
		1955
		1956	do
		1957	{
		1958	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1959	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1960
		1961	char *pend = strrchr (path, '/');
		1962
		1963	if (!pend)
		1964	break; /* whoops, no '/', complain to your admin */
		1965
		1966	*pend = 0;
		1967	w->wd = inotify_add_watch (fs_fd, path, mask);
		1968	}
		1969	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1970	}
		1971	}
		1972	else
		1973	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1974
		1975	if (w->wd >= 0)
		1976	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1977	}
		1978
		1979	static void noinline
		1980	infy_del (EV_P_ ev_stat *w)
		1981	{
		1982	int slot;
		1983	int wd = w->wd;
		1984
		1985	if (wd < 0)
		1986	return;
		1987
		1988	w->wd = -2;
		1989	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1990	wlist_del (&fs_hash [slot].head, (WL)w);
		1991
		1992	/* remove this watcher, if others are watching it, they will rearm */
		1993	inotify_rm_watch (fs_fd, wd);
		1994	}
		1995
		1996	static void noinline
		1997	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1998	{
		1999	if (slot < 0)
		2000	/* overflow, need to check for all hahs slots */
		2001	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2002	infy_wd (EV_A_ slot, wd, ev);
		2003	else
		2004	{
		2005	WL w_;
		2006
		2007	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2008	{
		2009	ev_stat *w = (ev_stat *)w_;
		2010	w_ = w_->next; /* lets us remove this watcher and all before it */
		2011
		2012	if (w->wd == wd || wd == -1)
		2013	{
		2014	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2015	{
		2016	w->wd = -1;
		2017	infy_add (EV_A_ w); /* re-add, no matter what */
		2018	}
		2019
		2020	stat_timer_cb (EV_A_ &w->timer, 0);
		2021	}
		2022	}
		2023	}
		2024	}
		2025
346	static void	2026	static void
347	ev_start (struct ev_watcher *w, int active)	2027	infy_cb (EV_P_ ev_io *w, int revents)
348	{	2028	{
349	w->pending = 0;	2029	char buf [EV_INOTIFY_BUFSIZE];
350	w->active = active;	2030	struct inotify_event *ev = (struct inotify_event *)buf;
		2031	int ofs;
		2032	int len = read (fs_fd, buf, sizeof (buf));
		2033
		2034	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2035	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2036	}
		2037
		2038	void inline_size
		2039	infy_init (EV_P)
		2040	{
		2041	if (fs_fd != -2)
		2042	return;
		2043
		2044	fs_fd = inotify_init ();
		2045
		2046	if (fs_fd >= 0)
		2047	{
		2048	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2049	ev_set_priority (&fs_w, EV_MAXPRI);
		2050	ev_io_start (EV_A_ &fs_w);
		2051	}
		2052	}
		2053
		2054	void inline_size
		2055	infy_fork (EV_P)
		2056	{
		2057	int slot;
		2058
		2059	if (fs_fd < 0)
		2060	return;
		2061
		2062	close (fs_fd);
		2063	fs_fd = inotify_init ();
		2064
		2065	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2066	{
		2067	WL w_ = fs_hash [slot].head;
		2068	fs_hash [slot].head = 0;
		2069
		2070	while (w_)
		2071	{
		2072	ev_stat *w = (ev_stat *)w_;
		2073	w_ = w_->next; /* lets us add this watcher */
		2074
		2075	w->wd = -1;
		2076
		2077	if (fs_fd >= 0)
		2078	infy_add (EV_A_ w); /* re-add, no matter what */
		2079	else
		2080	ev_timer_start (EV_A_ &w->timer);
		2081	}
		2082
		2083	}
		2084	}
		2085
		2086	#endif
		2087
		2088	void
		2089	ev_stat_stat (EV_P_ ev_stat *w)
		2090	{
		2091	if (lstat (w->path, &w->attr) < 0)
		2092	w->attr.st_nlink = 0;
		2093	else if (!w->attr.st_nlink)
		2094	w->attr.st_nlink = 1;
		2095	}
		2096
		2097	static void noinline
		2098	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2099	{
		2100	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2101
		2102	/* we copy this here each the time so that */
		2103	/* prev has the old value when the callback gets invoked */
		2104	w->prev = w->attr;
		2105	ev_stat_stat (EV_A_ w);
		2106
		2107	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2108	if (
		2109	w->prev.st_dev != w->attr.st_dev
		2110	|| w->prev.st_ino != w->attr.st_ino
		2111	|| w->prev.st_mode != w->attr.st_mode
		2112	|| w->prev.st_nlink != w->attr.st_nlink
		2113	|| w->prev.st_uid != w->attr.st_uid
		2114	|| w->prev.st_gid != w->attr.st_gid
		2115	|| w->prev.st_rdev != w->attr.st_rdev
		2116	|| w->prev.st_size != w->attr.st_size
		2117	|| w->prev.st_atime != w->attr.st_atime
		2118	|| w->prev.st_mtime != w->attr.st_mtime
		2119	|| w->prev.st_ctime != w->attr.st_ctime
		2120	) {
		2121	#if EV_USE_INOTIFY
		2122	infy_del (EV_A_ w);
		2123	infy_add (EV_A_ w);
		2124	ev_stat_stat (EV_A_ w); /* avoid race... */
		2125	#endif
		2126
		2127	ev_feed_event (EV_A_ w, EV_STAT);
		2128	}
		2129	}
		2130
		2131	void
		2132	ev_stat_start (EV_P_ ev_stat *w)
		2133	{
		2134	if (expect_false (ev_is_active (w)))
		2135	return;
		2136
		2137	/* since we use memcmp, we need to clear any padding data etc. */
		2138	memset (&w->prev, 0, sizeof (ev_statdata));
		2139	memset (&w->attr, 0, sizeof (ev_statdata));
		2140
		2141	ev_stat_stat (EV_A_ w);
		2142
		2143	if (w->interval < MIN_STAT_INTERVAL)
		2144	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2145
		2146	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2147	ev_set_priority (&w->timer, ev_priority (w));
		2148
		2149	#if EV_USE_INOTIFY
		2150	infy_init (EV_A);
		2151
		2152	if (fs_fd >= 0)
		2153	infy_add (EV_A_ w);
		2154	else
		2155	#endif
		2156	ev_timer_start (EV_A_ &w->timer);
		2157
		2158	ev_start (EV_A_ (W)w, 1);
		2159	}
		2160
		2161	void
		2162	ev_stat_stop (EV_P_ ev_stat *w)
		2163	{
		2164	clear_pending (EV_A_ (W)w);
		2165	if (expect_false (!ev_is_active (w)))
		2166	return;
		2167
		2168	#if EV_USE_INOTIFY
		2169	infy_del (EV_A_ w);
		2170	#endif
		2171	ev_timer_stop (EV_A_ &w->timer);
		2172
		2173	ev_stop (EV_A_ (W)w);
		2174	}
		2175	#endif
		2176
		2177	#if EV_IDLE_ENABLE
		2178	void
		2179	ev_idle_start (EV_P_ ev_idle *w)
		2180	{
		2181	if (expect_false (ev_is_active (w)))
		2182	return;
		2183
		2184	pri_adjust (EV_A_ (W)w);
		2185
		2186	{
		2187	int active = ++idlecnt [ABSPRI (w)];
		2188
		2189	++idleall;
		2190	ev_start (EV_A_ (W)w, active);
		2191
		2192	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2193	idles [ABSPRI (w)][active - 1] = w;
		2194	}
		2195	}
		2196
		2197	void
		2198	ev_idle_stop (EV_P_ ev_idle *w)
		2199	{
		2200	clear_pending (EV_A_ (W)w);
		2201	if (expect_false (!ev_is_active (w)))
		2202	return;
		2203
		2204	{
		2205	int active = ((W)w)->active;
		2206
		2207	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2208	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2209
		2210	ev_stop (EV_A_ (W)w);
		2211	--idleall;
		2212	}
		2213	}
		2214	#endif
		2215
		2216	void
		2217	ev_prepare_start (EV_P_ ev_prepare *w)
		2218	{
		2219	if (expect_false (ev_is_active (w)))
		2220	return;
		2221
		2222	ev_start (EV_A_ (W)w, ++preparecnt);
		2223	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2224	prepares [preparecnt - 1] = w;
		2225	}
		2226
		2227	void
		2228	ev_prepare_stop (EV_P_ ev_prepare *w)
		2229	{
		2230	clear_pending (EV_A_ (W)w);
		2231	if (expect_false (!ev_is_active (w)))
		2232	return;
		2233
		2234	{
		2235	int active = ((W)w)->active;
		2236	prepares [active - 1] = prepares [--preparecnt];
		2237	((W)prepares [active - 1])->active = active;
		2238	}
		2239
		2240	ev_stop (EV_A_ (W)w);
		2241	}
		2242
		2243	void
		2244	ev_check_start (EV_P_ ev_check *w)
		2245	{
		2246	if (expect_false (ev_is_active (w)))
		2247	return;
		2248
		2249	ev_start (EV_A_ (W)w, ++checkcnt);
		2250	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2251	checks [checkcnt - 1] = w;
		2252	}
		2253
		2254	void
		2255	ev_check_stop (EV_P_ ev_check *w)
		2256	{
		2257	clear_pending (EV_A_ (W)w);
		2258	if (expect_false (!ev_is_active (w)))
		2259	return;
		2260
		2261	{
		2262	int active = ((W)w)->active;
		2263	checks [active - 1] = checks [--checkcnt];
		2264	((W)checks [active - 1])->active = active;
		2265	}
		2266
		2267	ev_stop (EV_A_ (W)w);
		2268	}
		2269
		2270	#if EV_EMBED_ENABLE
		2271	void noinline
		2272	ev_embed_sweep (EV_P_ ev_embed *w)
		2273	{
		2274	ev_loop (w->other, EVLOOP_NONBLOCK);
351	}	2275	}
352		2276
353	static void	2277	static void
354	ev_stop (struct ev_watcher *w)	2278	embed_io_cb (EV_P_ ev_io *io, int revents)
355	{	2279	{
356	if (w->pending)	2280	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
357	pendings [w->pending - 1].w = 0;
358		2281
359	w->active = 0;
360	/* nop */
361	}
362
363	void
364	evio_start (struct ev_io *w)
365	{
366	if (ev_is_active (w))	2282	if (ev_cb (w))
367	return;	2283	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	2284	else
407	w->at += ev_now;	2285	ev_loop (w->other, EVLOOP_NONBLOCK);
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	}	2286	}
415		2287
416	void	2288	static void
417	evtimer_stop (struct ev_timer *w)	2289	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
418	{	2290	{
		2291	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2292
		2293	{
		2294	struct ev_loop *loop = w->other;
		2295
		2296	while (fdchangecnt)
		2297	{
		2298	fd_reify (EV_A);
		2299	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2300	}
		2301	}
		2302	}
		2303
		2304	#if 0
		2305	static void
		2306	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2307	{
		2308	ev_idle_stop (EV_A_ idle);
		2309	}
		2310	#endif
		2311
		2312	void
		2313	ev_embed_start (EV_P_ ev_embed *w)
		2314	{
		2315	if (expect_false (ev_is_active (w)))
		2316	return;
		2317
		2318	{
		2319	struct ev_loop *loop = w->other;
		2320	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2321	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2322	}
		2323
		2324	ev_set_priority (&w->io, ev_priority (w));
		2325	ev_io_start (EV_A_ &w->io);
		2326
		2327	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2328	ev_set_priority (&w->prepare, EV_MINPRI);
		2329	ev_prepare_start (EV_A_ &w->prepare);
		2330
		2331	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2332
		2333	ev_start (EV_A_ (W)w, 1);
		2334	}
		2335
		2336	void
		2337	ev_embed_stop (EV_P_ ev_embed *w)
		2338	{
		2339	clear_pending (EV_A_ (W)w);
419	if (!ev_is_active (w))	2340	if (expect_false (!ev_is_active (w)))
420	return;	2341	return;
421		2342
422	timers [w->active - 1] = timers [--timercnt];	2343	ev_io_stop (EV_A_ &w->io);
423	downheap (w->active - 1);	2344	ev_prepare_stop (EV_A_ &w->prepare);
424	ev_stop ((struct ev_watcher *)w);
425	}
426		2345
		2346	ev_stop (EV_A_ (W)w);
		2347	}
		2348	#endif
		2349
		2350	#if EV_FORK_ENABLE
427	void	2351	void
428	evsignal_start (struct ev_signal *w)	2352	ev_fork_start (EV_P_ ev_fork *w)
429	{	2353	{
430	if (ev_is_active (w))	2354	if (expect_false (ev_is_active (w)))
431	return;	2355	return;
432		2356
433	ev_start ((struct ev_watcher *)w, 1);	2357	ev_start (EV_A_ (W)w, ++forkcnt);
434	array_needsize (signals, signalmax, w->signum, signals_init);	2358	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
435	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2359	forks [forkcnt - 1] = w;
436	}	2360	}
437		2361
438	void	2362	void
439	evsignal_stop (struct ev_signal *w)	2363	ev_fork_stop (EV_P_ ev_fork *w)
440	{	2364	{
		2365	clear_pending (EV_A_ (W)w);
441	if (!ev_is_active (w))	2366	if (expect_false (!ev_is_active (w)))
442	return;	2367	return;
443		2368
444	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2369	{
445	ev_stop ((struct ev_watcher *)w);	2370	int active = ((W)w)->active;
		2371	forks [active - 1] = forks [--forkcnt];
		2372	((W)forks [active - 1])->active = active;
		2373	}
		2374
		2375	ev_stop (EV_A_ (W)w);
446	}	2376	}
		2377	#endif
447		2378
448	/*****************************************************************************/	2379	/*****************************************************************************/
449	#if 1	2380
		2381	struct ev_once
		2382	{
		2383	ev_io io;
		2384	ev_timer to;
		2385	void (*cb)(int revents, void *arg);
		2386	void *arg;
		2387	};
450		2388
451	static void	2389	static void
452	sin_cb (struct ev_io *w, int revents)	2390	once_cb (EV_P_ struct ev_once *once, int revents)
453	{	2391	{
454	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2392	void (*cb)(int revents, void *arg) = once->cb;
		2393	void *arg = once->arg;
		2394
		2395	ev_io_stop (EV_A_ &once->io);
		2396	ev_timer_stop (EV_A_ &once->to);
		2397	ev_free (once);
		2398
		2399	cb (revents, arg);
455	}	2400	}
456		2401
457	static void	2402	static void
		2403	once_cb_io (EV_P_ ev_io *w, int revents)
		2404	{
		2405	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2406	}
		2407
		2408	static void
458	ocb (struct ev_timer *w, int revents)	2409	once_cb_to (EV_P_ ev_timer *w, int revents)
459	{	2410	{
460	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2411	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
461	}	2412	}
462		2413
463	int main (void)	2414	void
		2415	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
464	{	2416	{
465	struct ev_io sin;	2417	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
466		2418
467	ev_init (0);	2419	if (expect_false (!once))
468		2420	{
469	evw_init (&sin, sin_cb, 55);	2421	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;	2422	return;
486	}	2423	}
487		2424
488	#endif	2425	once->cb = cb;
		2426	once->arg = arg;
489		2427
		2428	ev_init (&once->io, once_cb_io);
		2429	if (fd >= 0)
		2430	{
		2431	ev_io_set (&once->io, fd, events);
		2432	ev_io_start (EV_A_ &once->io);
		2433	}
490		2434
		2435	ev_init (&once->to, once_cb_to);
		2436	if (timeout >= 0.)
		2437	{
		2438	ev_timer_set (&once->to, timeout, 0.);
		2439	ev_timer_start (EV_A_ &once->to);
		2440	}
		2441	}
491		2442
		2443	#if EV_MULTIPLICITY
		2444	#include "ev_wrap.h"
		2445	#endif
492		2446
		2447	#ifdef __cplusplus
		2448	}
		2449	#endif
		2450

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