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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 1.210 by root, Sat Feb 9 00:34:11 2008 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007,2008 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 EV_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	#ifdef EV_FD_TO_WIN32_HANDLE
		606	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		607	#else
		608	anfd->handle = _get_osfhandle (fd);
		609	#endif
		610	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		611	}
		612	#endif
		613
		614	{
		615	unsigned char o_events = anfd->events;
		616	unsigned char o_reify = anfd->reify;
		617
		618	anfd->reify = 0;
		619	anfd->events = events;
		620
		621	if (o_events != events || o_reify & EV_IOFDSET)
		622	backend_modify (EV_A_ fd, o_events, events);
81	}	623	}
		624	}
		625
		626	fdchangecnt = 0;
		627	}
		628
		629	void inline_size
		630	fd_change (EV_P_ int fd, int flags)
		631	{
		632	unsigned char reify = anfds [fd].reify;
		633	anfds [fd].reify |= flags;
		634
		635	if (expect_true (!reify))
		636	{
		637	++fdchangecnt;
		638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		639	fdchanges [fdchangecnt - 1] = fd;
		640	}
		641	}
		642
		643	void inline_speed
		644	fd_kill (EV_P_ int fd)
		645	{
		646	ev_io *w;
		647
		648	while ((w = (ev_io *)anfds [fd].head))
		649	{
		650	ev_io_stop (EV_A_ w);
		651	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		652	}
		653	}
		654
		655	int inline_size
		656	fd_valid (int fd)
		657	{
		658	#ifdef _WIN32
		659	return _get_osfhandle (fd) != -1;
		660	#else
		661	return fcntl (fd, F_GETFD) != -1;
		662	#endif
		663	}
		664
		665	/* called on EBADF to verify fds */
		666	static void noinline
		667	fd_ebadf (EV_P)
		668	{
		669	int fd;
		670
		671	for (fd = 0; fd < anfdmax; ++fd)
		672	if (anfds [fd].events)
		673	if (!fd_valid (fd) == -1 && errno == EBADF)
		674	fd_kill (EV_A_ fd);
		675	}
		676
		677	/* called on ENOMEM in select/poll to kill some fds and retry */
		678	static void noinline
		679	fd_enomem (EV_P)
		680	{
		681	int fd;
		682
		683	for (fd = anfdmax; fd--; )
		684	if (anfds [fd].events)
		685	{
		686	fd_kill (EV_A_ fd);
		687	return;
		688	}
		689	}
		690
		691	/* usually called after fork if backend needs to re-arm all fds from scratch */
		692	static void noinline
		693	fd_rearm_all (EV_P)
		694	{
		695	int fd;
		696
		697	for (fd = 0; fd < anfdmax; ++fd)
		698	if (anfds [fd].events)
		699	{
		700	anfds [fd].events = 0;
		701	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		702	}
		703	}
		704
		705	/*****************************************************************************/
		706
		707	void inline_speed
		708	upheap (WT *heap, int k)
		709	{
		710	WT w = heap [k];
		711
		712	while (k)
		713	{
		714	int p = (k - 1) >> 1;
		715
		716	if (heap [p]->at <= w->at)
		717	break;
		718
		719	heap [k] = heap [p];
		720	((W)heap [k])->active = k + 1;
		721	k = p;
		722	}
		723
		724	heap [k] = w;
		725	((W)heap [k])->active = k + 1;
		726	}
		727
		728	void inline_speed
		729	downheap (WT *heap, int N, int k)
		730	{
		731	WT w = heap [k];
		732
		733	for (;;)
		734	{
		735	int c = (k << 1) + 1;
		736
		737	if (c >= N)
		738	break;
		739
		740	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		741	? 1 : 0;
		742
		743	if (w->at <= heap [c]->at)
		744	break;
		745
		746	heap [k] = heap [c];
		747	((W)heap [k])->active = k + 1;
		748
		749	k = c;
		750	}
		751
		752	heap [k] = w;
		753	((W)heap [k])->active = k + 1;
		754	}
		755
		756	void inline_size
		757	adjustheap (WT *heap, int N, int k)
		758	{
		759	upheap (heap, k);
		760	downheap (heap, N, k);
		761	}
		762
		763	/*****************************************************************************/
82		764
83	typedef struct	765	typedef struct
84	{	766	{
85	struct ev_io *head;	767	WL head;
86	unsigned char wev, rev; /* want, received event set */	768	EV_ATOMIC_T gotsig;
87	} ANFD;	769	} ANSIG;
88		770
89	static ANFD *anfds;	771	static ANSIG *signals;
90	static int anfdmax;	772	static int signalmax;
91		773
92	static int *fdchanges;	774	static EV_ATOMIC_T gotsig;
93	static int fdchangemax, fdchangecnt;	775
		776	void inline_size
		777	signals_init (ANSIG *base, int count)
		778	{
		779	while (count--)
		780	{
		781	base->head = 0;
		782	base->gotsig = 0;
		783
		784	++base;
		785	}
		786	}
		787
		788	/*****************************************************************************/
		789
		790	void inline_speed
		791	fd_intern (int fd)
		792	{
		793	#ifdef _WIN32
		794	int arg = 1;
		795	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		796	#else
		797	fcntl (fd, F_SETFD, FD_CLOEXEC);
		798	fcntl (fd, F_SETFL, O_NONBLOCK);
		799	#endif
		800	}
		801
		802	static void noinline
		803	evpipe_init (EV_P)
		804	{
		805	if (!ev_is_active (&pipeev))
		806	{
		807	while (pipe (evpipe))
		808	syserr ("(libev) error creating signal/async pipe");
		809
		810	fd_intern (evpipe [0]);
		811	fd_intern (evpipe [1]);
		812
		813	ev_io_set (&pipeev, evpipe [0], EV_READ);
		814	ev_io_start (EV_A_ &pipeev);
		815	ev_unref (EV_A); /* watcher should not keep loop alive */
		816	}
		817	}
		818
		819	void inline_size
		820	evpipe_write (EV_P_ int sig, int async)
		821	{
		822	if (!(gotasync || gotsig))
		823	{
		824	int old_errno = errno; /* save errno becaue write might clobber it */
		825
		826	if (sig) gotsig = 1;
		827	if (async) gotasync = 1;
		828
		829	write (evpipe [1], &old_errno, 1);
		830
		831	errno = old_errno;
		832	}
		833	}
94		834
95	static void	835	static void
96	anfds_init (ANFD *base, int count)	836	pipecb (EV_P_ ev_io *iow, int revents)
97	{	837	{
98	while (count--)	838	{
		839	int dummy;
		840	read (evpipe [0], &dummy, 1);
		841	}
		842
		843	if (gotsig)
		844	{
		845	int signum;
		846	gotsig = 0;
		847
		848	for (signum = signalmax; signum--; )
		849	if (signals [signum].gotsig)
		850	ev_feed_signal_event (EV_A_ signum + 1);
99	{	851	}
100	base->head = 0;	852
101	base->wev = base->rev = EV_NONE;	853	#if EV_ASYNC_ENABLE
102	++base;	854	if (gotasync)
103	}	855	{
104	}	856	int i;
		857	gotasync = 0;
105		858
106	typedef struct	859	for (i = asynccnt; i--; )
107	{	860	if (asyncs [i]->sent)
108	struct ev_watcher *w;	861	{
109	int events;	862	asyncs [i]->sent = 0;
110	} ANPENDING;	863	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		864	}
		865	}
		866	#endif
		867	}
111		868
112	static ANPENDING *pendings;	869	/*****************************************************************************/
113	static int pendingmax, pendingcnt;
114		870
115	static void	871	static void
116	event (struct ev_watcher *w, int events)	872	sighandler (int signum)
117	{	873	{
118	w->pending = ++pendingcnt;	874	#if EV_MULTIPLICITY
119	array_needsize (pendings, pendingmax, pendingcnt, );	875	struct ev_loop *loop = &default_loop_struct;
120	pendings [pendingcnt - 1].w = w;	876	#endif
121	pendings [pendingcnt - 1].events = events;	877
		878	#if _WIN32
		879	signal (signum, sighandler);
		880	#endif
		881
		882	signals [signum - 1].gotsig = 1;
		883	evpipe_write (EV_A_ 1, 0);
122	}	884	}
		885
		886	void noinline
		887	ev_feed_signal_event (EV_P_ int signum)
		888	{
		889	WL w;
		890
		891	#if EV_MULTIPLICITY
		892	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		893	#endif
		894
		895	--signum;
		896
		897	if (signum < 0 || signum >= signalmax)
		898	return;
		899
		900	signals [signum].gotsig = 0;
		901
		902	for (w = signals [signum].head; w; w = w->next)
		903	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		904	}
		905
		906	/*****************************************************************************/
		907
		908	static WL childs [EV_PID_HASHSIZE];
		909
		910	#ifndef _WIN32
		911
		912	static ev_signal childev;
		913
		914	#ifndef WIFCONTINUED
		915	# define WIFCONTINUED(status) 0
		916	#endif
		917
		918	void inline_speed
		919	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		920	{
		921	ev_child *w;
		922	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		923
		924	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		925	{
		926	if ((w->pid == pid || !w->pid)
		927	&& (!traced || (w->flags & 1)))
		928	{
		929	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		930	w->rpid = pid;
		931	w->rstatus = status;
		932	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		933	}
		934	}
		935	}
		936
		937	#ifndef WCONTINUED
		938	# define WCONTINUED 0
		939	#endif
123		940
124	static void	941	static void
125	fd_event (int fd, int events)	942	childcb (EV_P_ ev_signal *sw, int revents)
126	{	943	{
127	ANFD *anfd = anfds + fd;	944	int pid, status;
128	struct ev_io *w;
129		945
130	for (w = anfd->head; w; w = w->next)	946	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
131	{	947	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
132	int ev = w->events & events;	948	if (!WCONTINUED
		949	|| errno != EINVAL
		950	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		951	return;
133		952
134	if (ev)	953	/* make sure we are called again until all childs have been reaped */
135	event ((struct ev_watcher *)w, ev);	954	/* we need to do it this way so that the callback gets called before we continue */
136	}	955	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
137	}
138		956
139	static struct ev_timer **timers;	957	child_reap (EV_A_ sw, pid, pid, status);
140	static int timermax, timercnt;	958	if (EV_PID_HASHSIZE > 1)
141		959	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	}	960	}
158		961
159	static void	962	#endif
160	downheap (int k)
161	{
162	struct ev_timer *w = timers [k];
163		963
164	while (k <= (timercnt >> 1))	964	/*****************************************************************************/
165	{
166	int j = k << 1;
167		965
168	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	966	#if EV_USE_PORT
169	++j;	967	# include "ev_port.c"
170		968	#endif
171	if (w->at <= timers [j]->at)	969	#if EV_USE_KQUEUE
172	break;	970	# include "ev_kqueue.c"
173		971	#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	972	#if EV_USE_EPOLL
194	# include "ev_epoll.c"	973	# include "ev_epoll.c"
195	#endif	974	#endif
		975	#if EV_USE_POLL
		976	# include "ev_poll.c"
		977	#endif
196	#if HAVE_SELECT	978	#if EV_USE_SELECT
197	# include "ev_select.c"	979	# include "ev_select.c"
198	#endif	980	#endif
199		981
200	int ev_init (int flags)	982	int
		983	ev_version_major (void)
201	{	984	{
		985	return EV_VERSION_MAJOR;
		986	}
		987
		988	int
		989	ev_version_minor (void)
		990	{
		991	return EV_VERSION_MINOR;
		992	}
		993
		994	/* return true if we are running with elevated privileges and should ignore env variables */
		995	int inline_size
		996	enable_secure (void)
		997	{
		998	#ifdef _WIN32
		999	return 0;
		1000	#else
		1001	return getuid () != geteuid ()
		1002	|| getgid () != getegid ();
		1003	#endif
		1004	}
		1005
		1006	unsigned int
		1007	ev_supported_backends (void)
		1008	{
		1009	unsigned int flags = 0;
		1010
		1011	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1012	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1013	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1014	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1015	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1016
		1017	return flags;
		1018	}
		1019
		1020	unsigned int
		1021	ev_recommended_backends (void)
		1022	{
		1023	unsigned int flags = ev_supported_backends ();
		1024
		1025	#ifndef __NetBSD__
		1026	/* kqueue is borked on everything but netbsd apparently */
		1027	/* it usually doesn't work correctly on anything but sockets and pipes */
		1028	flags &= ~EVBACKEND_KQUEUE;
		1029	#endif
		1030	#ifdef __APPLE__
		1031	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1032	flags &= ~EVBACKEND_POLL;
		1033	#endif
		1034
		1035	return flags;
		1036	}
		1037
		1038	unsigned int
		1039	ev_embeddable_backends (void)
		1040	{
		1041	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1042
		1043	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1044	/* please fix it and tell me how to detect the fix */
		1045	flags &= ~EVBACKEND_EPOLL;
		1046
		1047	return flags;
		1048	}
		1049
		1050	unsigned int
		1051	ev_backend (EV_P)
		1052	{
		1053	return backend;
		1054	}
		1055
		1056	unsigned int
		1057	ev_loop_count (EV_P)
		1058	{
		1059	return loop_count;
		1060	}
		1061
		1062	void
		1063	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1064	{
		1065	io_blocktime = interval;
		1066	}
		1067
		1068	void
		1069	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1070	{
		1071	timeout_blocktime = interval;
		1072	}
		1073
		1074	static void noinline
		1075	loop_init (EV_P_ unsigned int flags)
		1076	{
		1077	if (!backend)
		1078	{
202	#if HAVE_MONOTONIC	1079	#if EV_USE_MONOTONIC
203	{	1080	{
204	struct timespec ts;	1081	struct timespec ts;
205	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1082	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
206	have_monotonic = 1;	1083	have_monotonic = 1;
207	}	1084	}
208	#endif	1085	#endif
209		1086
210	ev_now = ev_time ();	1087	ev_rt_now = ev_time ();
		1088	mn_now = get_clock ();
		1089	now_floor = mn_now;
		1090	rtmn_diff = ev_rt_now - mn_now;
211		1091
		1092	io_blocktime = 0.;
		1093	timeout_blocktime = 0.;
		1094	backend = 0;
		1095	backend_fd = -1;
		1096	gotasync = 0;
		1097	#if EV_USE_INOTIFY
		1098	fs_fd = -2;
		1099	#endif
		1100
		1101	/* pid check not overridable via env */
		1102	#ifndef _WIN32
		1103	if (flags & EVFLAG_FORKCHECK)
		1104	curpid = getpid ();
		1105	#endif
		1106
		1107	if (!(flags & EVFLAG_NOENV)
		1108	&& !enable_secure ()
		1109	&& getenv ("LIBEV_FLAGS"))
		1110	flags = atoi (getenv ("LIBEV_FLAGS"));
		1111
		1112	if (!(flags & 0x0000ffffUL))
		1113	flags |= ev_recommended_backends ();
		1114
		1115	#if EV_USE_PORT
		1116	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1117	#endif
		1118	#if EV_USE_KQUEUE
		1119	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1120	#endif
212	#if HAVE_EPOLL	1121	#if EV_USE_EPOLL
213	if (epoll_init (flags))	1122	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
214	return ev_method;
215	#endif	1123	#endif
		1124	#if EV_USE_POLL
		1125	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1126	#endif
216	#if HAVE_SELECT	1127	#if EV_USE_SELECT
217	if (select_init (flags))	1128	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
218	return ev_method;
219	#endif	1129	#endif
220		1130
221	ev_method = EVMETHOD_NONE;	1131	ev_init (&pipeev, pipecb);
222	return ev_method;	1132	ev_set_priority (&pipeev, EV_MAXPRI);
		1133	}
223	}	1134	}
224		1135
225	void ev_prefork (void)	1136	static void noinline
226	{	1137	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	{	1138	{
243	int i;	1139	int i;
244		1140
245	for (i = 0; i < pendingcnt; ++i)	1141	if (ev_is_active (&pipeev))
		1142	{
		1143	ev_ref (EV_A); /* signal watcher */
		1144	ev_io_stop (EV_A_ &pipeev);
		1145
		1146	close (evpipe [0]); evpipe [0] = 0;
		1147	close (evpipe [1]); evpipe [1] = 0;
246	{	1148	}
247	ANPENDING *p = pendings + i;
248		1149
249	if (p->w)	1150	#if EV_USE_INOTIFY
		1151	if (fs_fd >= 0)
		1152	close (fs_fd);
		1153	#endif
		1154
		1155	if (backend_fd >= 0)
		1156	close (backend_fd);
		1157
		1158	#if EV_USE_PORT
		1159	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1160	#endif
		1161	#if EV_USE_KQUEUE
		1162	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1163	#endif
		1164	#if EV_USE_EPOLL
		1165	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1166	#endif
		1167	#if EV_USE_POLL
		1168	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1169	#endif
		1170	#if EV_USE_SELECT
		1171	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1172	#endif
		1173
		1174	for (i = NUMPRI; i--; )
		1175	{
		1176	array_free (pending, [i]);
		1177	#if EV_IDLE_ENABLE
		1178	array_free (idle, [i]);
		1179	#endif
		1180	}
		1181
		1182	ev_free (anfds); anfdmax = 0;
		1183
		1184	/* have to use the microsoft-never-gets-it-right macro */
		1185	array_free (fdchange, EMPTY);
		1186	array_free (timer, EMPTY);
		1187	#if EV_PERIODIC_ENABLE
		1188	array_free (periodic, EMPTY);
		1189	#endif
		1190	#if EV_FORK_ENABLE
		1191	array_free (fork, EMPTY);
		1192	#endif
		1193	array_free (prepare, EMPTY);
		1194	array_free (check, EMPTY);
		1195	#if EV_ASYNC_ENABLE
		1196	array_free (async, EMPTY);
		1197	#endif
		1198
		1199	backend = 0;
		1200	}
		1201
		1202	void inline_size infy_fork (EV_P);
		1203
		1204	void inline_size
		1205	loop_fork (EV_P)
		1206	{
		1207	#if EV_USE_PORT
		1208	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1209	#endif
		1210	#if EV_USE_KQUEUE
		1211	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1212	#endif
		1213	#if EV_USE_EPOLL
		1214	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1215	#endif
		1216	#if EV_USE_INOTIFY
		1217	infy_fork (EV_A);
		1218	#endif
		1219
		1220	if (ev_is_active (&pipeev))
		1221	{
		1222	/* this "locks" the handlers against writing to the pipe */
		1223	gotsig = gotasync = 1;
		1224
		1225	ev_ref (EV_A);
		1226	ev_io_stop (EV_A_ &pipeev);
		1227	close (evpipe [0]);
		1228	close (evpipe [1]);
		1229
		1230	evpipe_init (EV_A);
		1231	/* now iterate over everything, in case we missed something */
		1232	pipecb (EV_A_ &pipeev, EV_READ);
		1233	}
		1234
		1235	postfork = 0;
		1236	}
		1237
		1238	#if EV_MULTIPLICITY
		1239	struct ev_loop *
		1240	ev_loop_new (unsigned int flags)
		1241	{
		1242	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1243
		1244	memset (loop, 0, sizeof (struct ev_loop));
		1245
		1246	loop_init (EV_A_ flags);
		1247
		1248	if (ev_backend (EV_A))
		1249	return loop;
		1250
		1251	return 0;
		1252	}
		1253
		1254	void
		1255	ev_loop_destroy (EV_P)
		1256	{
		1257	loop_destroy (EV_A);
		1258	ev_free (loop);
		1259	}
		1260
		1261	void
		1262	ev_loop_fork (EV_P)
		1263	{
		1264	postfork = 1; /* must be in line with ev_default_fork */
		1265	}
		1266
		1267	#endif
		1268
		1269	#if EV_MULTIPLICITY
		1270	struct ev_loop *
		1271	ev_default_loop_init (unsigned int flags)
		1272	#else
		1273	int
		1274	ev_default_loop (unsigned int flags)
		1275	#endif
		1276	{
		1277	if (!ev_default_loop_ptr)
		1278	{
		1279	#if EV_MULTIPLICITY
		1280	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1281	#else
		1282	ev_default_loop_ptr = 1;
		1283	#endif
		1284
		1285	loop_init (EV_A_ flags);
		1286
		1287	if (ev_backend (EV_A))
250	{	1288	{
251	p->w->pending = 0;	1289	#ifndef _WIN32
252	p->w->cb (p->w, p->events);	1290	ev_signal_init (&childev, childcb, SIGCHLD);
		1291	ev_set_priority (&childev, EV_MAXPRI);
		1292	ev_signal_start (EV_A_ &childev);
		1293	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1294	#endif
253	}	1295	}
		1296	else
		1297	ev_default_loop_ptr = 0;
		1298	}
		1299
		1300	return ev_default_loop_ptr;
		1301	}
		1302
		1303	void
		1304	ev_default_destroy (void)
		1305	{
		1306	#if EV_MULTIPLICITY
		1307	struct ev_loop *loop = ev_default_loop_ptr;
		1308	#endif
		1309
		1310	#ifndef _WIN32
		1311	ev_ref (EV_A); /* child watcher */
		1312	ev_signal_stop (EV_A_ &childev);
		1313	#endif
		1314
		1315	loop_destroy (EV_A);
		1316	}
		1317
		1318	void
		1319	ev_default_fork (void)
		1320	{
		1321	#if EV_MULTIPLICITY
		1322	struct ev_loop *loop = ev_default_loop_ptr;
		1323	#endif
		1324
		1325	if (backend)
		1326	postfork = 1; /* must be in line with ev_loop_fork */
		1327	}
		1328
		1329	/*****************************************************************************/
		1330
		1331	void
		1332	ev_invoke (EV_P_ void *w, int revents)
		1333	{
		1334	EV_CB_INVOKE ((W)w, revents);
		1335	}
		1336
		1337	void inline_speed
		1338	call_pending (EV_P)
		1339	{
		1340	int pri;
		1341
		1342	for (pri = NUMPRI; pri--; )
		1343	while (pendingcnt [pri])
		1344	{
		1345	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1346
		1347	if (expect_true (p->w))
		1348	{
		1349	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1350
		1351	p->w->pending = 0;
		1352	EV_CB_INVOKE (p->w, p->events);
		1353	}
254	}	1354	}
255
256	pendingcnt = 0;
257	}	1355	}
258		1356
259	static void	1357	void inline_size
260	timer_reify (void)	1358	timers_reify (EV_P)
261	{	1359	{
262	while (timercnt && timers [0]->at <= ev_now)	1360	while (timercnt && ((WT)timers [0])->at <= mn_now)
263	{	1361	{
264	struct ev_timer *w = timers [0];	1362	ev_timer *w = (ev_timer *)timers [0];
265		1363
		1364	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1365
266	/* first reschedule timer */	1366	/* first reschedule or stop timer */
267	if (w->repeat)	1367	if (w->repeat)
268	{	1368	{
269	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	1369	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
270	if (w->is_abs)	1370
271	w->at += floor ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
272	else
273	w->at = ev_now + w->repeat;	1371	((WT)w)->at += w->repeat;
		1372	if (((WT)w)->at < mn_now)
		1373	((WT)w)->at = mn_now;
274		1374
275	fprintf (stderr, "b %f\n", w->at);//D	1375	downheap (timers, timercnt, 0);
276
277	downheap (0);
278	}	1376	}
279	else	1377	else
280	evtimer_stop (w); /* nonrepeating: stop timer */	1378	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
281		1379
282	event ((struct ev_watcher *)w, EV_TIMEOUT);	1380	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1381	}
		1382	}
		1383
		1384	#if EV_PERIODIC_ENABLE
		1385	void inline_size
		1386	periodics_reify (EV_P)
		1387	{
		1388	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
283	}	1389	{
284	}	1390	ev_periodic *w = (ev_periodic *)periodics [0];
285		1391
286	int ev_loop_done;	1392	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
287		1393
		1394	/* first reschedule or stop timer */
		1395	if (w->reschedule_cb)
		1396	{
		1397	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1398	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1399	downheap (periodics, periodiccnt, 0);
		1400	}
		1401	else if (w->interval)
		1402	{
		1403	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1404	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1405	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1406	downheap (periodics, periodiccnt, 0);
		1407	}
		1408	else
		1409	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1410
		1411	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1412	}
		1413	}
		1414
		1415	static void noinline
		1416	periodics_reschedule (EV_P)
		1417	{
		1418	int i;
		1419
		1420	/* adjust periodics after time jump */
		1421	for (i = 0; i < periodiccnt; ++i)
		1422	{
		1423	ev_periodic *w = (ev_periodic *)periodics [i];
		1424
		1425	if (w->reschedule_cb)
		1426	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1427	else if (w->interval)
		1428	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1429	}
		1430
		1431	/* now rebuild the heap */
		1432	for (i = periodiccnt >> 1; i--; )
		1433	downheap (periodics, periodiccnt, i);
		1434	}
		1435	#endif
		1436
		1437	#if EV_IDLE_ENABLE
		1438	void inline_size
		1439	idle_reify (EV_P)
		1440	{
		1441	if (expect_false (idleall))
		1442	{
		1443	int pri;
		1444
		1445	for (pri = NUMPRI; pri--; )
		1446	{
		1447	if (pendingcnt [pri])
		1448	break;
		1449
		1450	if (idlecnt [pri])
		1451	{
		1452	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1453	break;
		1454	}
		1455	}
		1456	}
		1457	}
		1458	#endif
		1459
		1460	void inline_speed
		1461	time_update (EV_P_ ev_tstamp max_block)
		1462	{
		1463	int i;
		1464
		1465	#if EV_USE_MONOTONIC
		1466	if (expect_true (have_monotonic))
		1467	{
		1468	ev_tstamp odiff = rtmn_diff;
		1469
		1470	mn_now = get_clock ();
		1471
		1472	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1473	/* interpolate in the meantime */
		1474	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1475	{
		1476	ev_rt_now = rtmn_diff + mn_now;
		1477	return;
		1478	}
		1479
		1480	now_floor = mn_now;
		1481	ev_rt_now = ev_time ();
		1482
		1483	/* loop a few times, before making important decisions.
		1484	* on the choice of "4": one iteration isn't enough,
		1485	* in case we get preempted during the calls to
		1486	* ev_time and get_clock. a second call is almost guaranteed
		1487	* to succeed in that case, though. and looping a few more times
		1488	* doesn't hurt either as we only do this on time-jumps or
		1489	* in the unlikely event of having been preempted here.
		1490	*/
		1491	for (i = 4; --i; )
		1492	{
		1493	rtmn_diff = ev_rt_now - mn_now;
		1494
		1495	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1496	return; /* all is well */
		1497
		1498	ev_rt_now = ev_time ();
		1499	mn_now = get_clock ();
		1500	now_floor = mn_now;
		1501	}
		1502
		1503	# if EV_PERIODIC_ENABLE
		1504	periodics_reschedule (EV_A);
		1505	# endif
		1506	/* no timer adjustment, as the monotonic clock doesn't jump */
		1507	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1508	}
		1509	else
		1510	#endif
		1511	{
		1512	ev_rt_now = ev_time ();
		1513
		1514	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1515	{
		1516	#if EV_PERIODIC_ENABLE
		1517	periodics_reschedule (EV_A);
		1518	#endif
		1519	/* adjust timers. this is easy, as the offset is the same for all of them */
		1520	for (i = 0; i < timercnt; ++i)
		1521	((WT)timers [i])->at += ev_rt_now - mn_now;
		1522	}
		1523
		1524	mn_now = ev_rt_now;
		1525	}
		1526	}
		1527
		1528	void
		1529	ev_ref (EV_P)
		1530	{
		1531	++activecnt;
		1532	}
		1533
		1534	void
		1535	ev_unref (EV_P)
		1536	{
		1537	--activecnt;
		1538	}
		1539
		1540	static int loop_done;
		1541
		1542	void
288	int ev_loop (int flags)	1543	ev_loop (EV_P_ int flags)
289	{	1544	{
290	double block;
291	ev_loop_done = flags & EVLOOP_ONESHOT;	1545	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1546	? EVUNLOOP_ONE
		1547	: EVUNLOOP_CANCEL;
		1548
		1549	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
292		1550
293	do	1551	do
294	{	1552	{
		1553	#ifndef _WIN32
		1554	if (expect_false (curpid)) /* penalise the forking check even more */
		1555	if (expect_false (getpid () != curpid))
		1556	{
		1557	curpid = getpid ();
		1558	postfork = 1;
		1559	}
		1560	#endif
		1561
		1562	#if EV_FORK_ENABLE
		1563	/* we might have forked, so queue fork handlers */
		1564	if (expect_false (postfork))
		1565	if (forkcnt)
		1566	{
		1567	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1568	call_pending (EV_A);
		1569	}
		1570	#endif
		1571
		1572	/* queue prepare watchers (and execute them) */
		1573	if (expect_false (preparecnt))
		1574	{
		1575	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1576	call_pending (EV_A);
		1577	}
		1578
		1579	if (expect_false (!activecnt))
		1580	break;
		1581
		1582	/* we might have forked, so reify kernel state if necessary */
		1583	if (expect_false (postfork))
		1584	loop_fork (EV_A);
		1585
295	/* update fd-related kernel structures */	1586	/* update fd-related kernel structures */
296	method_reify (); fdchangecnt = 0;	1587	fd_reify (EV_A);
297		1588
298	/* calculate blocking time */	1589	/* calculate blocking time */
299	ev_now = ev_time ();	1590	{
		1591	ev_tstamp waittime = 0.;
		1592	ev_tstamp sleeptime = 0.;
300		1593
301	if (flags & EVLOOP_NONBLOCK)	1594	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
302	block = 0.;
303	else if (!timercnt)
304	block = MAX_BLOCKTIME;
305	else
306	{	1595	{
307	block = timers [0]->at - ev_now + method_fudge;	1596	/* update time to cancel out callback processing overhead */
308	if (block < 0.) block = 0.;	1597	time_update (EV_A_ 1e100);
309	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;	1598
		1599	waittime = MAX_BLOCKTIME;
		1600
		1601	if (timercnt)
		1602	{
		1603	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
		1604	if (waittime > to) waittime = to;
		1605	}
		1606
		1607	#if EV_PERIODIC_ENABLE
		1608	if (periodiccnt)
		1609	{
		1610	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
		1611	if (waittime > to) waittime = to;
		1612	}
		1613	#endif
		1614
		1615	if (expect_false (waittime < timeout_blocktime))
		1616	waittime = timeout_blocktime;
		1617
		1618	sleeptime = waittime - backend_fudge;
		1619
		1620	if (expect_true (sleeptime > io_blocktime))
		1621	sleeptime = io_blocktime;
		1622
		1623	if (sleeptime)
		1624	{
		1625	ev_sleep (sleeptime);
		1626	waittime -= sleeptime;
		1627	}
310	}	1628	}
311		1629
312	fprintf (stderr, "block %f\n", block);//D	1630	++loop_count;
313	method_poll (block);	1631	backend_poll (EV_A_ waittime);
314		1632
		1633	/* update ev_rt_now, do magic */
		1634	time_update (EV_A_ waittime + sleeptime);
		1635	}
		1636
315	/* put pending timers into pendign queue and reschedule them */	1637	/* queue pending timers and reschedule them */
		1638	timers_reify (EV_A); /* relative timers called last */
		1639	#if EV_PERIODIC_ENABLE
		1640	periodics_reify (EV_A); /* absolute timers called first */
		1641	#endif
		1642
		1643	#if EV_IDLE_ENABLE
		1644	/* queue idle watchers unless other events are pending */
316	timer_reify ();	1645	idle_reify (EV_A);
		1646	#endif
317		1647
318	ev_now = ev_time ();	1648	/* queue check watchers, to be executed first */
		1649	if (expect_false (checkcnt))
		1650	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1651
319	call_pending ();	1652	call_pending (EV_A);
320	}
321	while (!ev_loop_done);
322	}
323		1653
324	static void	1654	}
325	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1655	while (expect_true (activecnt && !loop_done));
		1656
		1657	if (loop_done == EVUNLOOP_ONE)
		1658	loop_done = EVUNLOOP_CANCEL;
		1659	}
		1660
		1661	void
		1662	ev_unloop (EV_P_ int how)
		1663	{
		1664	loop_done = how;
		1665	}
		1666
		1667	/*****************************************************************************/
		1668
		1669	void inline_size
		1670	wlist_add (WL *head, WL elem)
326	{	1671	{
327	elem->next = *head;	1672	elem->next = *head;
328	*head = elem;	1673	*head = elem;
329	}	1674	}
330		1675
331	static void	1676	void inline_size
332	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1677	wlist_del (WL *head, WL elem)
333	{	1678	{
334	while (*head)	1679	while (*head)
335	{	1680	{
336	if (*head == elem)	1681	if (*head == elem)
337	{	1682	{
…		…
341		1686
342	head = &(*head)->next;	1687	head = &(*head)->next;
343	}	1688	}
344	}	1689	}
345		1690
		1691	void inline_speed
		1692	clear_pending (EV_P_ W w)
		1693	{
		1694	if (w->pending)
		1695	{
		1696	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1697	w->pending = 0;
		1698	}
		1699	}
		1700
		1701	int
		1702	ev_clear_pending (EV_P_ void *w)
		1703	{
		1704	W w_ = (W)w;
		1705	int pending = w_->pending;
		1706
		1707	if (expect_true (pending))
		1708	{
		1709	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1710	w_->pending = 0;
		1711	p->w = 0;
		1712	return p->events;
		1713	}
		1714	else
		1715	return 0;
		1716	}
		1717
		1718	void inline_size
		1719	pri_adjust (EV_P_ W w)
		1720	{
		1721	int pri = w->priority;
		1722	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1723	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1724	w->priority = pri;
		1725	}
		1726
		1727	void inline_speed
		1728	ev_start (EV_P_ W w, int active)
		1729	{
		1730	pri_adjust (EV_A_ w);
		1731	w->active = active;
		1732	ev_ref (EV_A);
		1733	}
		1734
		1735	void inline_size
		1736	ev_stop (EV_P_ W w)
		1737	{
		1738	ev_unref (EV_A);
		1739	w->active = 0;
		1740	}
		1741
		1742	/*****************************************************************************/
		1743
		1744	void noinline
		1745	ev_io_start (EV_P_ ev_io *w)
		1746	{
		1747	int fd = w->fd;
		1748
		1749	if (expect_false (ev_is_active (w)))
		1750	return;
		1751
		1752	assert (("ev_io_start called with negative fd", fd >= 0));
		1753
		1754	ev_start (EV_A_ (W)w, 1);
		1755	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1756	wlist_add (&anfds[fd].head, (WL)w);
		1757
		1758	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1759	w->events &= ~EV_IOFDSET;
		1760	}
		1761
		1762	void noinline
		1763	ev_io_stop (EV_P_ ev_io *w)
		1764	{
		1765	clear_pending (EV_A_ (W)w);
		1766	if (expect_false (!ev_is_active (w)))
		1767	return;
		1768
		1769	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1770
		1771	wlist_del (&anfds[w->fd].head, (WL)w);
		1772	ev_stop (EV_A_ (W)w);
		1773
		1774	fd_change (EV_A_ w->fd, 1);
		1775	}
		1776
		1777	void noinline
		1778	ev_timer_start (EV_P_ ev_timer *w)
		1779	{
		1780	if (expect_false (ev_is_active (w)))
		1781	return;
		1782
		1783	((WT)w)->at += mn_now;
		1784
		1785	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1786
		1787	ev_start (EV_A_ (W)w, ++timercnt);
		1788	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1789	timers [timercnt - 1] = (WT)w;
		1790	upheap (timers, timercnt - 1);
		1791
		1792	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1793	}
		1794
		1795	void noinline
		1796	ev_timer_stop (EV_P_ ev_timer *w)
		1797	{
		1798	clear_pending (EV_A_ (W)w);
		1799	if (expect_false (!ev_is_active (w)))
		1800	return;
		1801
		1802	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1803
		1804	{
		1805	int active = ((W)w)->active;
		1806
		1807	if (expect_true (--active < --timercnt))
		1808	{
		1809	timers [active] = timers [timercnt];
		1810	adjustheap (timers, timercnt, active);
		1811	}
		1812	}
		1813
		1814	((WT)w)->at -= mn_now;
		1815
		1816	ev_stop (EV_A_ (W)w);
		1817	}
		1818
		1819	void noinline
		1820	ev_timer_again (EV_P_ ev_timer *w)
		1821	{
		1822	if (ev_is_active (w))
		1823	{
		1824	if (w->repeat)
		1825	{
		1826	((WT)w)->at = mn_now + w->repeat;
		1827	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1828	}
		1829	else
		1830	ev_timer_stop (EV_A_ w);
		1831	}
		1832	else if (w->repeat)
		1833	{
		1834	w->at = w->repeat;
		1835	ev_timer_start (EV_A_ w);
		1836	}
		1837	}
		1838
		1839	#if EV_PERIODIC_ENABLE
		1840	void noinline
		1841	ev_periodic_start (EV_P_ ev_periodic *w)
		1842	{
		1843	if (expect_false (ev_is_active (w)))
		1844	return;
		1845
		1846	if (w->reschedule_cb)
		1847	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1848	else if (w->interval)
		1849	{
		1850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1851	/* this formula differs from the one in periodic_reify because we do not always round up */
		1852	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1853	}
		1854	else
		1855	((WT)w)->at = w->offset;
		1856
		1857	ev_start (EV_A_ (W)w, ++periodiccnt);
		1858	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
		1859	periodics [periodiccnt - 1] = (WT)w;
		1860	upheap (periodics, periodiccnt - 1);
		1861
		1862	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1863	}
		1864
		1865	void noinline
		1866	ev_periodic_stop (EV_P_ ev_periodic *w)
		1867	{
		1868	clear_pending (EV_A_ (W)w);
		1869	if (expect_false (!ev_is_active (w)))
		1870	return;
		1871
		1872	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1873
		1874	{
		1875	int active = ((W)w)->active;
		1876
		1877	if (expect_true (--active < --periodiccnt))
		1878	{
		1879	periodics [active] = periodics [periodiccnt];
		1880	adjustheap (periodics, periodiccnt, active);
		1881	}
		1882	}
		1883
		1884	ev_stop (EV_A_ (W)w);
		1885	}
		1886
		1887	void noinline
		1888	ev_periodic_again (EV_P_ ev_periodic *w)
		1889	{
		1890	/* TODO: use adjustheap and recalculation */
		1891	ev_periodic_stop (EV_A_ w);
		1892	ev_periodic_start (EV_A_ w);
		1893	}
		1894	#endif
		1895
		1896	#ifndef SA_RESTART
		1897	# define SA_RESTART 0
		1898	#endif
		1899
		1900	void noinline
		1901	ev_signal_start (EV_P_ ev_signal *w)
		1902	{
		1903	#if EV_MULTIPLICITY
		1904	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1905	#endif
		1906	if (expect_false (ev_is_active (w)))
		1907	return;
		1908
		1909	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1910
		1911	evpipe_init (EV_A);
		1912
		1913	{
		1914	#ifndef _WIN32
		1915	sigset_t full, prev;
		1916	sigfillset (&full);
		1917	sigprocmask (SIG_SETMASK, &full, &prev);
		1918	#endif
		1919
		1920	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1921
		1922	#ifndef _WIN32
		1923	sigprocmask (SIG_SETMASK, &prev, 0);
		1924	#endif
		1925	}
		1926
		1927	ev_start (EV_A_ (W)w, 1);
		1928	wlist_add (&signals [w->signum - 1].head, (WL)w);
		1929
		1930	if (!((WL)w)->next)
		1931	{
		1932	#if _WIN32
		1933	signal (w->signum, sighandler);
		1934	#else
		1935	struct sigaction sa;
		1936	sa.sa_handler = sighandler;
		1937	sigfillset (&sa.sa_mask);
		1938	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1939	sigaction (w->signum, &sa, 0);
		1940	#endif
		1941	}
		1942	}
		1943
		1944	void noinline
		1945	ev_signal_stop (EV_P_ ev_signal *w)
		1946	{
		1947	clear_pending (EV_A_ (W)w);
		1948	if (expect_false (!ev_is_active (w)))
		1949	return;
		1950
		1951	wlist_del (&signals [w->signum - 1].head, (WL)w);
		1952	ev_stop (EV_A_ (W)w);
		1953
		1954	if (!signals [w->signum - 1].head)
		1955	signal (w->signum, SIG_DFL);
		1956	}
		1957
		1958	void
		1959	ev_child_start (EV_P_ ev_child *w)
		1960	{
		1961	#if EV_MULTIPLICITY
		1962	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1963	#endif
		1964	if (expect_false (ev_is_active (w)))
		1965	return;
		1966
		1967	ev_start (EV_A_ (W)w, 1);
		1968	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1969	}
		1970
		1971	void
		1972	ev_child_stop (EV_P_ ev_child *w)
		1973	{
		1974	clear_pending (EV_A_ (W)w);
		1975	if (expect_false (!ev_is_active (w)))
		1976	return;
		1977
		1978	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1979	ev_stop (EV_A_ (W)w);
		1980	}
		1981
		1982	#if EV_STAT_ENABLE
		1983
		1984	# ifdef _WIN32
		1985	# undef lstat
		1986	# define lstat(a,b) _stati64 (a,b)
		1987	# endif
		1988
		1989	#define DEF_STAT_INTERVAL 5.0074891
		1990	#define MIN_STAT_INTERVAL 0.1074891
		1991
		1992	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1993
		1994	#if EV_USE_INOTIFY
		1995	# define EV_INOTIFY_BUFSIZE 8192
		1996
		1997	static void noinline
		1998	infy_add (EV_P_ ev_stat *w)
		1999	{
		2000	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);
		2001
		2002	if (w->wd < 0)
		2003	{
		2004	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2005
		2006	/* monitor some parent directory for speedup hints */
		2007	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2008	{
		2009	char path [4096];
		2010	strcpy (path, w->path);
		2011
		2012	do
		2013	{
		2014	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2015	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2016
		2017	char *pend = strrchr (path, '/');
		2018
		2019	if (!pend)
		2020	break; /* whoops, no '/', complain to your admin */
		2021
		2022	*pend = 0;
		2023	w->wd = inotify_add_watch (fs_fd, path, mask);
		2024	}
		2025	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2026	}
		2027	}
		2028	else
		2029	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2030
		2031	if (w->wd >= 0)
		2032	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2033	}
		2034
		2035	static void noinline
		2036	infy_del (EV_P_ ev_stat *w)
		2037	{
		2038	int slot;
		2039	int wd = w->wd;
		2040
		2041	if (wd < 0)
		2042	return;
		2043
		2044	w->wd = -2;
		2045	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2046	wlist_del (&fs_hash [slot].head, (WL)w);
		2047
		2048	/* remove this watcher, if others are watching it, they will rearm */
		2049	inotify_rm_watch (fs_fd, wd);
		2050	}
		2051
		2052	static void noinline
		2053	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2054	{
		2055	if (slot < 0)
		2056	/* overflow, need to check for all hahs slots */
		2057	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2058	infy_wd (EV_A_ slot, wd, ev);
		2059	else
		2060	{
		2061	WL w_;
		2062
		2063	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2064	{
		2065	ev_stat *w = (ev_stat *)w_;
		2066	w_ = w_->next; /* lets us remove this watcher and all before it */
		2067
		2068	if (w->wd == wd || wd == -1)
		2069	{
		2070	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2071	{
		2072	w->wd = -1;
		2073	infy_add (EV_A_ w); /* re-add, no matter what */
		2074	}
		2075
		2076	stat_timer_cb (EV_A_ &w->timer, 0);
		2077	}
		2078	}
		2079	}
		2080	}
		2081
346	static void	2082	static void
347	ev_start (struct ev_watcher *w, int active)	2083	infy_cb (EV_P_ ev_io *w, int revents)
348	{	2084	{
349	w->pending = 0;	2085	char buf [EV_INOTIFY_BUFSIZE];
350	w->active = active;	2086	struct inotify_event *ev = (struct inotify_event *)buf;
		2087	int ofs;
		2088	int len = read (fs_fd, buf, sizeof (buf));
		2089
		2090	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2091	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2092	}
		2093
		2094	void inline_size
		2095	infy_init (EV_P)
		2096	{
		2097	if (fs_fd != -2)
		2098	return;
		2099
		2100	fs_fd = inotify_init ();
		2101
		2102	if (fs_fd >= 0)
		2103	{
		2104	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2105	ev_set_priority (&fs_w, EV_MAXPRI);
		2106	ev_io_start (EV_A_ &fs_w);
		2107	}
		2108	}
		2109
		2110	void inline_size
		2111	infy_fork (EV_P)
		2112	{
		2113	int slot;
		2114
		2115	if (fs_fd < 0)
		2116	return;
		2117
		2118	close (fs_fd);
		2119	fs_fd = inotify_init ();
		2120
		2121	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2122	{
		2123	WL w_ = fs_hash [slot].head;
		2124	fs_hash [slot].head = 0;
		2125
		2126	while (w_)
		2127	{
		2128	ev_stat *w = (ev_stat *)w_;
		2129	w_ = w_->next; /* lets us add this watcher */
		2130
		2131	w->wd = -1;
		2132
		2133	if (fs_fd >= 0)
		2134	infy_add (EV_A_ w); /* re-add, no matter what */
		2135	else
		2136	ev_timer_start (EV_A_ &w->timer);
		2137	}
		2138
		2139	}
		2140	}
		2141
		2142	#endif
		2143
		2144	void
		2145	ev_stat_stat (EV_P_ ev_stat *w)
		2146	{
		2147	if (lstat (w->path, &w->attr) < 0)
		2148	w->attr.st_nlink = 0;
		2149	else if (!w->attr.st_nlink)
		2150	w->attr.st_nlink = 1;
		2151	}
		2152
		2153	static void noinline
		2154	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2155	{
		2156	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2157
		2158	/* we copy this here each the time so that */
		2159	/* prev has the old value when the callback gets invoked */
		2160	w->prev = w->attr;
		2161	ev_stat_stat (EV_A_ w);
		2162
		2163	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2164	if (
		2165	w->prev.st_dev != w->attr.st_dev
		2166	|| w->prev.st_ino != w->attr.st_ino
		2167	|| w->prev.st_mode != w->attr.st_mode
		2168	|| w->prev.st_nlink != w->attr.st_nlink
		2169	|| w->prev.st_uid != w->attr.st_uid
		2170	|| w->prev.st_gid != w->attr.st_gid
		2171	|| w->prev.st_rdev != w->attr.st_rdev
		2172	|| w->prev.st_size != w->attr.st_size
		2173	|| w->prev.st_atime != w->attr.st_atime
		2174	|| w->prev.st_mtime != w->attr.st_mtime
		2175	|| w->prev.st_ctime != w->attr.st_ctime
		2176	) {
		2177	#if EV_USE_INOTIFY
		2178	infy_del (EV_A_ w);
		2179	infy_add (EV_A_ w);
		2180	ev_stat_stat (EV_A_ w); /* avoid race... */
		2181	#endif
		2182
		2183	ev_feed_event (EV_A_ w, EV_STAT);
		2184	}
		2185	}
		2186
		2187	void
		2188	ev_stat_start (EV_P_ ev_stat *w)
		2189	{
		2190	if (expect_false (ev_is_active (w)))
		2191	return;
		2192
		2193	/* since we use memcmp, we need to clear any padding data etc. */
		2194	memset (&w->prev, 0, sizeof (ev_statdata));
		2195	memset (&w->attr, 0, sizeof (ev_statdata));
		2196
		2197	ev_stat_stat (EV_A_ w);
		2198
		2199	if (w->interval < MIN_STAT_INTERVAL)
		2200	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2201
		2202	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2203	ev_set_priority (&w->timer, ev_priority (w));
		2204
		2205	#if EV_USE_INOTIFY
		2206	infy_init (EV_A);
		2207
		2208	if (fs_fd >= 0)
		2209	infy_add (EV_A_ w);
		2210	else
		2211	#endif
		2212	ev_timer_start (EV_A_ &w->timer);
		2213
		2214	ev_start (EV_A_ (W)w, 1);
		2215	}
		2216
		2217	void
		2218	ev_stat_stop (EV_P_ ev_stat *w)
		2219	{
		2220	clear_pending (EV_A_ (W)w);
		2221	if (expect_false (!ev_is_active (w)))
		2222	return;
		2223
		2224	#if EV_USE_INOTIFY
		2225	infy_del (EV_A_ w);
		2226	#endif
		2227	ev_timer_stop (EV_A_ &w->timer);
		2228
		2229	ev_stop (EV_A_ (W)w);
		2230	}
		2231	#endif
		2232
		2233	#if EV_IDLE_ENABLE
		2234	void
		2235	ev_idle_start (EV_P_ ev_idle *w)
		2236	{
		2237	if (expect_false (ev_is_active (w)))
		2238	return;
		2239
		2240	pri_adjust (EV_A_ (W)w);
		2241
		2242	{
		2243	int active = ++idlecnt [ABSPRI (w)];
		2244
		2245	++idleall;
		2246	ev_start (EV_A_ (W)w, active);
		2247
		2248	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2249	idles [ABSPRI (w)][active - 1] = w;
		2250	}
		2251	}
		2252
		2253	void
		2254	ev_idle_stop (EV_P_ ev_idle *w)
		2255	{
		2256	clear_pending (EV_A_ (W)w);
		2257	if (expect_false (!ev_is_active (w)))
		2258	return;
		2259
		2260	{
		2261	int active = ((W)w)->active;
		2262
		2263	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2264	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2265
		2266	ev_stop (EV_A_ (W)w);
		2267	--idleall;
		2268	}
		2269	}
		2270	#endif
		2271
		2272	void
		2273	ev_prepare_start (EV_P_ ev_prepare *w)
		2274	{
		2275	if (expect_false (ev_is_active (w)))
		2276	return;
		2277
		2278	ev_start (EV_A_ (W)w, ++preparecnt);
		2279	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2280	prepares [preparecnt - 1] = w;
		2281	}
		2282
		2283	void
		2284	ev_prepare_stop (EV_P_ ev_prepare *w)
		2285	{
		2286	clear_pending (EV_A_ (W)w);
		2287	if (expect_false (!ev_is_active (w)))
		2288	return;
		2289
		2290	{
		2291	int active = ((W)w)->active;
		2292	prepares [active - 1] = prepares [--preparecnt];
		2293	((W)prepares [active - 1])->active = active;
		2294	}
		2295
		2296	ev_stop (EV_A_ (W)w);
		2297	}
		2298
		2299	void
		2300	ev_check_start (EV_P_ ev_check *w)
		2301	{
		2302	if (expect_false (ev_is_active (w)))
		2303	return;
		2304
		2305	ev_start (EV_A_ (W)w, ++checkcnt);
		2306	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2307	checks [checkcnt - 1] = w;
		2308	}
		2309
		2310	void
		2311	ev_check_stop (EV_P_ ev_check *w)
		2312	{
		2313	clear_pending (EV_A_ (W)w);
		2314	if (expect_false (!ev_is_active (w)))
		2315	return;
		2316
		2317	{
		2318	int active = ((W)w)->active;
		2319	checks [active - 1] = checks [--checkcnt];
		2320	((W)checks [active - 1])->active = active;
		2321	}
		2322
		2323	ev_stop (EV_A_ (W)w);
		2324	}
		2325
		2326	#if EV_EMBED_ENABLE
		2327	void noinline
		2328	ev_embed_sweep (EV_P_ ev_embed *w)
		2329	{
		2330	ev_loop (w->other, EVLOOP_NONBLOCK);
351	}	2331	}
352		2332
353	static void	2333	static void
354	ev_stop (struct ev_watcher *w)	2334	embed_io_cb (EV_P_ ev_io *io, int revents)
355	{	2335	{
356	if (w->pending)	2336	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
357	pendings [w->pending - 1].w = 0;
358		2337
359	w->active = 0;
360	/* nop */
361	}
362
363	void
364	evio_start (struct ev_io *w)
365	{
366	if (ev_is_active (w))	2338	if (ev_cb (w))
367	return;	2339	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	2340	else
407	w->at += ev_now;	2341	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	}	2342	}
415		2343
416	void	2344	static void
417	evtimer_stop (struct ev_timer *w)	2345	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
418	{	2346	{
		2347	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2348
		2349	{
		2350	struct ev_loop *loop = w->other;
		2351
		2352	while (fdchangecnt)
		2353	{
		2354	fd_reify (EV_A);
		2355	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2356	}
		2357	}
		2358	}
		2359
		2360	#if 0
		2361	static void
		2362	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2363	{
		2364	ev_idle_stop (EV_A_ idle);
		2365	}
		2366	#endif
		2367
		2368	void
		2369	ev_embed_start (EV_P_ ev_embed *w)
		2370	{
		2371	if (expect_false (ev_is_active (w)))
		2372	return;
		2373
		2374	{
		2375	struct ev_loop *loop = w->other;
		2376	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2377	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2378	}
		2379
		2380	ev_set_priority (&w->io, ev_priority (w));
		2381	ev_io_start (EV_A_ &w->io);
		2382
		2383	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2384	ev_set_priority (&w->prepare, EV_MINPRI);
		2385	ev_prepare_start (EV_A_ &w->prepare);
		2386
		2387	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2388
		2389	ev_start (EV_A_ (W)w, 1);
		2390	}
		2391
		2392	void
		2393	ev_embed_stop (EV_P_ ev_embed *w)
		2394	{
		2395	clear_pending (EV_A_ (W)w);
419	if (!ev_is_active (w))	2396	if (expect_false (!ev_is_active (w)))
420	return;	2397	return;
421		2398
422	timers [w->active - 1] = timers [--timercnt];	2399	ev_io_stop (EV_A_ &w->io);
423	downheap (w->active - 1);	2400	ev_prepare_stop (EV_A_ &w->prepare);
424	ev_stop ((struct ev_watcher *)w);
425	}
426		2401
		2402	ev_stop (EV_A_ (W)w);
		2403	}
		2404	#endif
		2405
		2406	#if EV_FORK_ENABLE
427	void	2407	void
428	evsignal_start (struct ev_signal *w)	2408	ev_fork_start (EV_P_ ev_fork *w)
429	{	2409	{
430	if (ev_is_active (w))	2410	if (expect_false (ev_is_active (w)))
431	return;	2411	return;
432		2412
433	ev_start ((struct ev_watcher *)w, 1);	2413	ev_start (EV_A_ (W)w, ++forkcnt);
434	array_needsize (signals, signalmax, w->signum, signals_init);	2414	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
435	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2415	forks [forkcnt - 1] = w;
436	}	2416	}
437		2417
438	void	2418	void
439	evsignal_stop (struct ev_signal *w)	2419	ev_fork_stop (EV_P_ ev_fork *w)
440	{	2420	{
		2421	clear_pending (EV_A_ (W)w);
441	if (!ev_is_active (w))	2422	if (expect_false (!ev_is_active (w)))
442	return;	2423	return;
443		2424
444	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2425	{
445	ev_stop ((struct ev_watcher *)w);	2426	int active = ((W)w)->active;
		2427	forks [active - 1] = forks [--forkcnt];
		2428	((W)forks [active - 1])->active = active;
		2429	}
		2430
		2431	ev_stop (EV_A_ (W)w);
446	}	2432	}
		2433	#endif
		2434
		2435	#if EV_ASYNC_ENABLE
		2436	void
		2437	ev_async_start (EV_P_ ev_async *w)
		2438	{
		2439	if (expect_false (ev_is_active (w)))
		2440	return;
		2441
		2442	evpipe_init (EV_A);
		2443
		2444	ev_start (EV_A_ (W)w, ++asynccnt);
		2445	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2446	asyncs [asynccnt - 1] = w;
		2447	}
		2448
		2449	void
		2450	ev_async_stop (EV_P_ ev_async *w)
		2451	{
		2452	clear_pending (EV_A_ (W)w);
		2453	if (expect_false (!ev_is_active (w)))
		2454	return;
		2455
		2456	{
		2457	int active = ((W)w)->active;
		2458	asyncs [active - 1] = asyncs [--asynccnt];
		2459	((W)asyncs [active - 1])->active = active;
		2460	}
		2461
		2462	ev_stop (EV_A_ (W)w);
		2463	}
		2464
		2465	void
		2466	ev_async_send (EV_P_ ev_async *w)
		2467	{
		2468	w->sent = 1;
		2469	evpipe_write (EV_A_ 0, 1);
		2470	}
		2471	#endif
447		2472
448	/*****************************************************************************/	2473	/*****************************************************************************/
449	#if 1	2474
		2475	struct ev_once
		2476	{
		2477	ev_io io;
		2478	ev_timer to;
		2479	void (*cb)(int revents, void *arg);
		2480	void *arg;
		2481	};
450		2482
451	static void	2483	static void
452	sin_cb (struct ev_io *w, int revents)	2484	once_cb (EV_P_ struct ev_once *once, int revents)
453	{	2485	{
454	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2486	void (*cb)(int revents, void *arg) = once->cb;
		2487	void *arg = once->arg;
		2488
		2489	ev_io_stop (EV_A_ &once->io);
		2490	ev_timer_stop (EV_A_ &once->to);
		2491	ev_free (once);
		2492
		2493	cb (revents, arg);
455	}	2494	}
456		2495
457	static void	2496	static void
		2497	once_cb_io (EV_P_ ev_io *w, int revents)
		2498	{
		2499	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2500	}
		2501
		2502	static void
458	ocb (struct ev_timer *w, int revents)	2503	once_cb_to (EV_P_ ev_timer *w, int revents)
459	{	2504	{
460	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2505	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
461	}	2506	}
462		2507
463	int main (void)	2508	void
		2509	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
464	{	2510	{
465	struct ev_io sin;	2511	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
466		2512
467	ev_init (0);	2513	if (expect_false (!once))
468		2514	{
469	evw_init (&sin, sin_cb, 55);	2515	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;	2516	return;
486	}	2517	}
487		2518
488	#endif	2519	once->cb = cb;
		2520	once->arg = arg;
489		2521
		2522	ev_init (&once->io, once_cb_io);
		2523	if (fd >= 0)
		2524	{
		2525	ev_io_set (&once->io, fd, events);
		2526	ev_io_start (EV_A_ &once->io);
		2527	}
490		2528
		2529	ev_init (&once->to, once_cb_to);
		2530	if (timeout >= 0.)
		2531	{
		2532	ev_timer_set (&once->to, timeout, 0.);
		2533	ev_timer_start (EV_A_ &once->to);
		2534	}
		2535	}
491		2536
		2537	#if EV_MULTIPLICITY
		2538	#include "ev_wrap.h"
		2539	#endif
492		2540
		2541	#ifdef __cplusplus
		2542	}
		2543	#endif
		2544

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