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Comparing libev/ev.c (file contents):
Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs.
Revision 1.217 by root, Sat Mar 22 13:42:45 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 ((unsigned long)(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 ? cur << 1 : 16; \	501	int ocur_ = (cur); \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	502	(base) = (type *)array_realloc \
73	base = realloc (base, sizeof (*base) * (newcnt)); \	503	(sizeof (type), (base), &(cur), (cnt)); \
74	init (base + cur, newcnt - cur); \	504	init ((base) + (ocur_), (cur) - ocur_); \
75	cur = newcnt; \	505	}
		506
		507	#if 0
		508	#define array_slim(type,stem) \
		509	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		510	{ \
		511	stem ## max = array_roundsize (stem ## cnt >> 1); \
		512	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		513	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		514	}
		515	#endif
		516
		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);
76	}	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	/*****************************************************************************/
77		764
78	typedef struct	765	typedef struct
79	{	766	{
80	struct ev_io *head;	767	WL head;
81	unsigned char wev, rev; /* want, received event set */	768	EV_ATOMIC_T gotsig;
82	} ANFD;	769	} ANSIG;
83		770
84	static ANFD *anfds;	771	static ANSIG *signals;
85	static int anfdmax;	772	static int signalmax;
86		773
87	static int *fdchanges;	774	static EV_ATOMIC_T gotsig;
88	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_ EV_ATOMIC_T *flag)
		821	{
		822	if (!*flag)
		823	{
		824	int old_errno = errno; /* save errno because write might clobber it */
		825
		826	*flag = 1;
		827	write (evpipe [1], &old_errno, 1);
		828
		829	errno = old_errno;
		830	}
		831	}
89		832
90	static void	833	static void
91	anfds_init (ANFD *base, int count)	834	pipecb (EV_P_ ev_io *iow, int revents)
92	{	835	{
93	while (count--)	836	{
		837	int dummy;
		838	read (evpipe [0], &dummy, 1);
		839	}
		840
		841	if (gotsig && ev_is_default_loop (EV_A))
		842	{
		843	int signum;
		844	gotsig = 0;
		845
		846	for (signum = signalmax; signum--; )
		847	if (signals [signum].gotsig)
		848	ev_feed_signal_event (EV_A_ signum + 1);
94	{	849	}
95	base->head = 0;	850
96	base->wev = base->rev = EV_NONE;	851	#if EV_ASYNC_ENABLE
97	++base;	852	if (gotasync)
98	}	853	{
99	}	854	int i;
		855	gotasync = 0;
100		856
101	typedef struct	857	for (i = asynccnt; i--; )
102	{	858	if (asyncs [i]->sent)
103	struct ev_watcher *w;	859	{
104	int events;	860	asyncs [i]->sent = 0;
105	} ANPENDING;	861	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		862	}
		863	}
		864	#endif
		865	}
106		866
107	static ANPENDING *pendings;	867	/*****************************************************************************/
108	static int pendingmax, pendingcnt;
109		868
110	static void	869	static void
111	event (struct ev_watcher *w, int events)	870	sighandler (int signum)
112	{	871	{
113	w->pending = ++pendingcnt;	872	#if EV_MULTIPLICITY
114	array_needsize (pendings, pendingmax, pendingcnt, );	873	struct ev_loop *loop = &default_loop_struct;
115	pendings [pendingcnt - 1].w = w;	874	#endif
116	pendings [pendingcnt - 1].events = events;	875
		876	#if _WIN32
		877	signal (signum, sighandler);
		878	#endif
		879
		880	signals [signum - 1].gotsig = 1;
		881	evpipe_write (EV_A_ &gotsig);
117	}	882	}
		883
		884	void noinline
		885	ev_feed_signal_event (EV_P_ int signum)
		886	{
		887	WL w;
		888
		889	#if EV_MULTIPLICITY
		890	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		891	#endif
		892
		893	--signum;
		894
		895	if (signum < 0 || signum >= signalmax)
		896	return;
		897
		898	signals [signum].gotsig = 0;
		899
		900	for (w = signals [signum].head; w; w = w->next)
		901	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		902	}
		903
		904	/*****************************************************************************/
		905
		906	static WL childs [EV_PID_HASHSIZE];
		907
		908	#ifndef _WIN32
		909
		910	static ev_signal childev;
		911
		912	#ifndef WIFCONTINUED
		913	# define WIFCONTINUED(status) 0
		914	#endif
		915
		916	void inline_speed
		917	child_reap (EV_P_ int chain, int pid, int status)
		918	{
		919	ev_child *w;
		920	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		921
		922	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		923	{
		924	if ((w->pid == pid || !w->pid)
		925	&& (!traced || (w->flags & 1)))
		926	{
		927	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		928	w->rpid = pid;
		929	w->rstatus = status;
		930	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		931	}
		932	}
		933	}
		934
		935	#ifndef WCONTINUED
		936	# define WCONTINUED 0
		937	#endif
118		938
119	static void	939	static void
120	fd_event (int fd, int events)	940	childcb (EV_P_ ev_signal *sw, int revents)
121	{	941	{
122	ANFD *anfd = anfds + fd;	942	int pid, status;
123	struct ev_io *w;
124		943
125	for (w = anfd->head; w; w = w->next)	944	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
126	{	945	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
127	int ev = w->events & events;	946	if (!WCONTINUED
		947	|| errno != EINVAL
		948	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		949	return;
128		950
129	if (ev)	951	/* make sure we are called again until all children have been reaped */
130	event ((struct ev_watcher *)w, ev);	952	/* we need to do it this way so that the callback gets called before we continue */
131	}	953	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
132	}
133		954
134	static struct ev_timer **timers;	955	child_reap (EV_A_ pid, pid, status);
135	static int timermax, timercnt;	956	if (EV_PID_HASHSIZE > 1)
136		957	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
137	static void
138	upheap (int k)
139	{
140	struct ev_timer *w = timers [k];
141
142	while (k && timers [k >> 1]->at > w->at)
143	{
144	timers [k] = timers [k >> 1];
145	timers [k]->active = k + 1;
146	k >>= 1;
147	}
148
149	timers [k] = w;
150	timers [k]->active = k + 1;
151
152	}	958	}
153		959
154	static void	960	#endif
155	downheap (int k)
156	{
157	struct ev_timer *w = timers [k];
158		961
159	while (k < (timercnt >> 1))	962	/*****************************************************************************/
160	{
161	int j = k << 1;
162		963
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	964	#if EV_USE_PORT
164	++j;	965	# include "ev_port.c"
165		966	#endif
166	if (w->at <= timers [j]->at)	967	#if EV_USE_KQUEUE
167	break;	968	# include "ev_kqueue.c"
168		969	#endif
169	timers [k] = timers [j];
170	timers [k]->active = k + 1;
171	k = j;
172	}
173
174	timers [k] = w;
175	timers [k]->active = k + 1;
176	}
177
178	static struct ev_signal **signals;
179	static int signalmax, signalcnt;
180
181	static void
182	signals_init (struct ev_signal **base, int count)
183	{
184	while (count--)
185	*base++ = 0;
186	}
187
188	#if HAVE_EPOLL	970	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	971	# include "ev_epoll.c"
190	#endif	972	#endif
		973	#if EV_USE_POLL
		974	# include "ev_poll.c"
		975	#endif
191	#if HAVE_SELECT	976	#if EV_USE_SELECT
192	# include "ev_select.c"	977	# include "ev_select.c"
193	#endif	978	#endif
194		979
195	int ev_init (int flags)	980	int
		981	ev_version_major (void)
196	{	982	{
		983	return EV_VERSION_MAJOR;
		984	}
		985
		986	int
		987	ev_version_minor (void)
		988	{
		989	return EV_VERSION_MINOR;
		990	}
		991
		992	/* return true if we are running with elevated privileges and should ignore env variables */
		993	int inline_size
		994	enable_secure (void)
		995	{
		996	#ifdef _WIN32
		997	return 0;
		998	#else
		999	return getuid () != geteuid ()
		1000	|| getgid () != getegid ();
		1001	#endif
		1002	}
		1003
		1004	unsigned int
		1005	ev_supported_backends (void)
		1006	{
		1007	unsigned int flags = 0;
		1008
		1009	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1010	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1011	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1012	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1013	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1014
		1015	return flags;
		1016	}
		1017
		1018	unsigned int
		1019	ev_recommended_backends (void)
		1020	{
		1021	unsigned int flags = ev_supported_backends ();
		1022
		1023	#ifndef __NetBSD__
		1024	/* kqueue is borked on everything but netbsd apparently */
		1025	/* it usually doesn't work correctly on anything but sockets and pipes */
		1026	flags &= ~EVBACKEND_KQUEUE;
		1027	#endif
		1028	#ifdef __APPLE__
		1029	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1030	flags &= ~EVBACKEND_POLL;
		1031	#endif
		1032
		1033	return flags;
		1034	}
		1035
		1036	unsigned int
		1037	ev_embeddable_backends (void)
		1038	{
		1039	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1040
		1041	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1042	/* please fix it and tell me how to detect the fix */
		1043	flags &= ~EVBACKEND_EPOLL;
		1044
		1045	return flags;
		1046	}
		1047
		1048	unsigned int
		1049	ev_backend (EV_P)
		1050	{
		1051	return backend;
		1052	}
		1053
		1054	unsigned int
		1055	ev_loop_count (EV_P)
		1056	{
		1057	return loop_count;
		1058	}
		1059
		1060	void
		1061	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1062	{
		1063	io_blocktime = interval;
		1064	}
		1065
		1066	void
		1067	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1068	{
		1069	timeout_blocktime = interval;
		1070	}
		1071
		1072	static void noinline
		1073	loop_init (EV_P_ unsigned int flags)
		1074	{
		1075	if (!backend)
		1076	{
197	#if HAVE_MONOTONIC	1077	#if EV_USE_MONOTONIC
198	{	1078	{
199	struct timespec ts;	1079	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1080	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	1081	have_monotonic = 1;
202	}	1082	}
203	#endif	1083	#endif
204		1084
205	ev_now = ev_time ();	1085	ev_rt_now = ev_time ();
		1086	mn_now = get_clock ();
		1087	now_floor = mn_now;
		1088	rtmn_diff = ev_rt_now - mn_now;
206		1089
		1090	io_blocktime = 0.;
		1091	timeout_blocktime = 0.;
		1092	backend = 0;
		1093	backend_fd = -1;
		1094	gotasync = 0;
		1095	#if EV_USE_INOTIFY
		1096	fs_fd = -2;
		1097	#endif
		1098
		1099	/* pid check not overridable via env */
		1100	#ifndef _WIN32
		1101	if (flags & EVFLAG_FORKCHECK)
		1102	curpid = getpid ();
		1103	#endif
		1104
		1105	if (!(flags & EVFLAG_NOENV)
		1106	&& !enable_secure ()
		1107	&& getenv ("LIBEV_FLAGS"))
		1108	flags = atoi (getenv ("LIBEV_FLAGS"));
		1109
		1110	if (!(flags & 0x0000ffffUL))
		1111	flags |= ev_recommended_backends ();
		1112
		1113	#if EV_USE_PORT
		1114	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1115	#endif
		1116	#if EV_USE_KQUEUE
		1117	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1118	#endif
207	#if HAVE_EPOLL	1119	#if EV_USE_EPOLL
208	if (epoll_init (flags))	1120	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
209	return ev_method;
210	#endif	1121	#endif
		1122	#if EV_USE_POLL
		1123	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1124	#endif
211	#if HAVE_SELECT	1125	#if EV_USE_SELECT
212	if (select_init (flags))	1126	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
213	return ev_method;
214	#endif	1127	#endif
215		1128
216	ev_method = EVMETHOD_NONE;	1129	ev_init (&pipeev, pipecb);
217	return ev_method;	1130	ev_set_priority (&pipeev, EV_MAXPRI);
		1131	}
218	}	1132	}
219		1133
220	void ev_prefork (void)	1134	static void noinline
221	{	1135	loop_destroy (EV_P)
222	}
223
224	void ev_postfork_parent (void)
225	{
226	}
227
228	void ev_postfork_child (void)
229	{
230	#if HAVE_EPOLL
231	epoll_postfork_child ();
232	#endif
233	}
234
235	static void
236	call_pending ()
237	{	1136	{
238	int i;	1137	int i;
239		1138
240	for (i = 0; i < pendingcnt; ++i)	1139	if (ev_is_active (&pipeev))
		1140	{
		1141	ev_ref (EV_A); /* signal watcher */
		1142	ev_io_stop (EV_A_ &pipeev);
		1143
		1144	close (evpipe [0]); evpipe [0] = 0;
		1145	close (evpipe [1]); evpipe [1] = 0;
241	{	1146	}
242	ANPENDING *p = pendings + i;
243		1147
244	if (p->w)	1148	#if EV_USE_INOTIFY
		1149	if (fs_fd >= 0)
		1150	close (fs_fd);
		1151	#endif
		1152
		1153	if (backend_fd >= 0)
		1154	close (backend_fd);
		1155
		1156	#if EV_USE_PORT
		1157	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1158	#endif
		1159	#if EV_USE_KQUEUE
		1160	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1161	#endif
		1162	#if EV_USE_EPOLL
		1163	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1164	#endif
		1165	#if EV_USE_POLL
		1166	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1167	#endif
		1168	#if EV_USE_SELECT
		1169	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1170	#endif
		1171
		1172	for (i = NUMPRI; i--; )
		1173	{
		1174	array_free (pending, [i]);
		1175	#if EV_IDLE_ENABLE
		1176	array_free (idle, [i]);
		1177	#endif
		1178	}
		1179
		1180	ev_free (anfds); anfdmax = 0;
		1181
		1182	/* have to use the microsoft-never-gets-it-right macro */
		1183	array_free (fdchange, EMPTY);
		1184	array_free (timer, EMPTY);
		1185	#if EV_PERIODIC_ENABLE
		1186	array_free (periodic, EMPTY);
		1187	#endif
		1188	#if EV_FORK_ENABLE
		1189	array_free (fork, EMPTY);
		1190	#endif
		1191	array_free (prepare, EMPTY);
		1192	array_free (check, EMPTY);
		1193	#if EV_ASYNC_ENABLE
		1194	array_free (async, EMPTY);
		1195	#endif
		1196
		1197	backend = 0;
		1198	}
		1199
		1200	void inline_size infy_fork (EV_P);
		1201
		1202	void inline_size
		1203	loop_fork (EV_P)
		1204	{
		1205	#if EV_USE_PORT
		1206	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1207	#endif
		1208	#if EV_USE_KQUEUE
		1209	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1210	#endif
		1211	#if EV_USE_EPOLL
		1212	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1213	#endif
		1214	#if EV_USE_INOTIFY
		1215	infy_fork (EV_A);
		1216	#endif
		1217
		1218	if (ev_is_active (&pipeev))
		1219	{
		1220	/* this "locks" the handlers against writing to the pipe */
		1221	/* while we modify the fd vars */
		1222	gotsig = 1;
		1223	#if EV_ASYNC_ENABLE
		1224	gotasync = 1;
		1225	#endif
		1226
		1227	ev_ref (EV_A);
		1228	ev_io_stop (EV_A_ &pipeev);
		1229	close (evpipe [0]);
		1230	close (evpipe [1]);
		1231
		1232	evpipe_init (EV_A);
		1233	/* now iterate over everything, in case we missed something */
		1234	pipecb (EV_A_ &pipeev, EV_READ);
		1235	}
		1236
		1237	postfork = 0;
		1238	}
		1239
		1240	#if EV_MULTIPLICITY
		1241	struct ev_loop *
		1242	ev_loop_new (unsigned int flags)
		1243	{
		1244	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1245
		1246	memset (loop, 0, sizeof (struct ev_loop));
		1247
		1248	loop_init (EV_A_ flags);
		1249
		1250	if (ev_backend (EV_A))
		1251	return loop;
		1252
		1253	return 0;
		1254	}
		1255
		1256	void
		1257	ev_loop_destroy (EV_P)
		1258	{
		1259	loop_destroy (EV_A);
		1260	ev_free (loop);
		1261	}
		1262
		1263	void
		1264	ev_loop_fork (EV_P)
		1265	{
		1266	postfork = 1; /* must be in line with ev_default_fork */
		1267	}
		1268
		1269	#endif
		1270
		1271	#if EV_MULTIPLICITY
		1272	struct ev_loop *
		1273	ev_default_loop_init (unsigned int flags)
		1274	#else
		1275	int
		1276	ev_default_loop (unsigned int flags)
		1277	#endif
		1278	{
		1279	if (!ev_default_loop_ptr)
		1280	{
		1281	#if EV_MULTIPLICITY
		1282	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1283	#else
		1284	ev_default_loop_ptr = 1;
		1285	#endif
		1286
		1287	loop_init (EV_A_ flags);
		1288
		1289	if (ev_backend (EV_A))
245	{	1290	{
246	p->w->pending = 0;	1291	#ifndef _WIN32
247	p->w->cb (p->w, p->events);	1292	ev_signal_init (&childev, childcb, SIGCHLD);
		1293	ev_set_priority (&childev, EV_MAXPRI);
		1294	ev_signal_start (EV_A_ &childev);
		1295	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1296	#endif
248	}	1297	}
		1298	else
		1299	ev_default_loop_ptr = 0;
		1300	}
		1301
		1302	return ev_default_loop_ptr;
		1303	}
		1304
		1305	void
		1306	ev_default_destroy (void)
		1307	{
		1308	#if EV_MULTIPLICITY
		1309	struct ev_loop *loop = ev_default_loop_ptr;
		1310	#endif
		1311
		1312	#ifndef _WIN32
		1313	ev_ref (EV_A); /* child watcher */
		1314	ev_signal_stop (EV_A_ &childev);
		1315	#endif
		1316
		1317	loop_destroy (EV_A);
		1318	}
		1319
		1320	void
		1321	ev_default_fork (void)
		1322	{
		1323	#if EV_MULTIPLICITY
		1324	struct ev_loop *loop = ev_default_loop_ptr;
		1325	#endif
		1326
		1327	if (backend)
		1328	postfork = 1; /* must be in line with ev_loop_fork */
		1329	}
		1330
		1331	/*****************************************************************************/
		1332
		1333	void
		1334	ev_invoke (EV_P_ void *w, int revents)
		1335	{
		1336	EV_CB_INVOKE ((W)w, revents);
		1337	}
		1338
		1339	void inline_speed
		1340	call_pending (EV_P)
		1341	{
		1342	int pri;
		1343
		1344	for (pri = NUMPRI; pri--; )
		1345	while (pendingcnt [pri])
		1346	{
		1347	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1348
		1349	if (expect_true (p->w))
		1350	{
		1351	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1352
		1353	p->w->pending = 0;
		1354	EV_CB_INVOKE (p->w, p->events);
		1355	}
249	}	1356	}
250
251	pendingcnt = 0;
252	}	1357	}
253		1358
254	static void	1359	void inline_size
255	timer_reify (void)	1360	timers_reify (EV_P)
256	{	1361	{
257	while (timercnt && timers [0]->at <= ev_now)	1362	while (timercnt && ((WT)timers [0])->at <= mn_now)
258	{	1363	{
259	struct ev_timer *w = timers [0];	1364	ev_timer *w = (ev_timer *)timers [0];
260		1365
		1366	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1367
261	/* first reschedule timer */	1368	/* first reschedule or stop timer */
262	if (w->repeat)	1369	if (w->repeat)
263	{	1370	{
264	if (w->is_abs)	1371	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
265	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1372
266	else
267	w->at = ev_now + w->repeat;	1373	((WT)w)->at += w->repeat;
		1374	if (((WT)w)->at < mn_now)
		1375	((WT)w)->at = mn_now;
268		1376
269	downheap (0);	1377	downheap (timers, timercnt, 0);
270	}	1378	}
271	else	1379	else
272	evtimer_stop (w); /* nonrepeating: stop timer */	1380	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
273		1381
274	event ((struct ev_watcher *)w, EV_TIMEOUT);	1382	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1383	}
		1384	}
		1385
		1386	#if EV_PERIODIC_ENABLE
		1387	void inline_size
		1388	periodics_reify (EV_P)
		1389	{
		1390	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
275	}	1391	{
276	}	1392	ev_periodic *w = (ev_periodic *)periodics [0];
277		1393
278	int ev_loop_done;	1394	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
279		1395
		1396	/* first reschedule or stop timer */
		1397	if (w->reschedule_cb)
		1398	{
		1399	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1400	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1401	downheap (periodics, periodiccnt, 0);
		1402	}
		1403	else if (w->interval)
		1404	{
		1405	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1406	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1407	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1408	downheap (periodics, periodiccnt, 0);
		1409	}
		1410	else
		1411	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1412
		1413	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1414	}
		1415	}
		1416
		1417	static void noinline
		1418	periodics_reschedule (EV_P)
		1419	{
		1420	int i;
		1421
		1422	/* adjust periodics after time jump */
		1423	for (i = 0; i < periodiccnt; ++i)
		1424	{
		1425	ev_periodic *w = (ev_periodic *)periodics [i];
		1426
		1427	if (w->reschedule_cb)
		1428	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1429	else if (w->interval)
		1430	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1431	}
		1432
		1433	/* now rebuild the heap */
		1434	for (i = periodiccnt >> 1; i--; )
		1435	downheap (periodics, periodiccnt, i);
		1436	}
		1437	#endif
		1438
		1439	#if EV_IDLE_ENABLE
		1440	void inline_size
		1441	idle_reify (EV_P)
		1442	{
		1443	if (expect_false (idleall))
		1444	{
		1445	int pri;
		1446
		1447	for (pri = NUMPRI; pri--; )
		1448	{
		1449	if (pendingcnt [pri])
		1450	break;
		1451
		1452	if (idlecnt [pri])
		1453	{
		1454	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1455	break;
		1456	}
		1457	}
		1458	}
		1459	}
		1460	#endif
		1461
		1462	void inline_speed
		1463	time_update (EV_P_ ev_tstamp max_block)
		1464	{
		1465	int i;
		1466
		1467	#if EV_USE_MONOTONIC
		1468	if (expect_true (have_monotonic))
		1469	{
		1470	ev_tstamp odiff = rtmn_diff;
		1471
		1472	mn_now = get_clock ();
		1473
		1474	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1475	/* interpolate in the meantime */
		1476	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1477	{
		1478	ev_rt_now = rtmn_diff + mn_now;
		1479	return;
		1480	}
		1481
		1482	now_floor = mn_now;
		1483	ev_rt_now = ev_time ();
		1484
		1485	/* loop a few times, before making important decisions.
		1486	* on the choice of "4": one iteration isn't enough,
		1487	* in case we get preempted during the calls to
		1488	* ev_time and get_clock. a second call is almost guaranteed
		1489	* to succeed in that case, though. and looping a few more times
		1490	* doesn't hurt either as we only do this on time-jumps or
		1491	* in the unlikely event of having been preempted here.
		1492	*/
		1493	for (i = 4; --i; )
		1494	{
		1495	rtmn_diff = ev_rt_now - mn_now;
		1496
		1497	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1498	return; /* all is well */
		1499
		1500	ev_rt_now = ev_time ();
		1501	mn_now = get_clock ();
		1502	now_floor = mn_now;
		1503	}
		1504
		1505	# if EV_PERIODIC_ENABLE
		1506	periodics_reschedule (EV_A);
		1507	# endif
		1508	/* no timer adjustment, as the monotonic clock doesn't jump */
		1509	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1510	}
		1511	else
		1512	#endif
		1513	{
		1514	ev_rt_now = ev_time ();
		1515
		1516	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1517	{
		1518	#if EV_PERIODIC_ENABLE
		1519	periodics_reschedule (EV_A);
		1520	#endif
		1521	/* adjust timers. this is easy, as the offset is the same for all of them */
		1522	for (i = 0; i < timercnt; ++i)
		1523	((WT)timers [i])->at += ev_rt_now - mn_now;
		1524	}
		1525
		1526	mn_now = ev_rt_now;
		1527	}
		1528	}
		1529
		1530	void
		1531	ev_ref (EV_P)
		1532	{
		1533	++activecnt;
		1534	}
		1535
		1536	void
		1537	ev_unref (EV_P)
		1538	{
		1539	--activecnt;
		1540	}
		1541
		1542	static int loop_done;
		1543
		1544	void
280	int ev_loop (int flags)	1545	ev_loop (EV_P_ int flags)
281	{	1546	{
282	double block;
283	ev_loop_done = flags & EVLOOP_ONESHOT;	1547	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1548	? EVUNLOOP_ONE
		1549	: EVUNLOOP_CANCEL;
		1550
		1551	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
284		1552
285	do	1553	do
286	{	1554	{
		1555	#ifndef _WIN32
		1556	if (expect_false (curpid)) /* penalise the forking check even more */
		1557	if (expect_false (getpid () != curpid))
		1558	{
		1559	curpid = getpid ();
		1560	postfork = 1;
		1561	}
		1562	#endif
		1563
		1564	#if EV_FORK_ENABLE
		1565	/* we might have forked, so queue fork handlers */
		1566	if (expect_false (postfork))
		1567	if (forkcnt)
		1568	{
		1569	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1570	call_pending (EV_A);
		1571	}
		1572	#endif
		1573
		1574	/* queue prepare watchers (and execute them) */
		1575	if (expect_false (preparecnt))
		1576	{
		1577	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1578	call_pending (EV_A);
		1579	}
		1580
		1581	if (expect_false (!activecnt))
		1582	break;
		1583
		1584	/* we might have forked, so reify kernel state if necessary */
		1585	if (expect_false (postfork))
		1586	loop_fork (EV_A);
		1587
287	/* update fd-related kernel structures */	1588	/* update fd-related kernel structures */
288	method_reify (); fdchangecnt = 0;	1589	fd_reify (EV_A);
289		1590
290	/* calculate blocking time */	1591	/* calculate blocking time */
291	ev_now = ev_time ();	1592	{
		1593	ev_tstamp waittime = 0.;
		1594	ev_tstamp sleeptime = 0.;
292		1595
293	if (flags & EVLOOP_NONBLOCK)	1596	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
294	block = 0.;
295	else if (!timercnt)
296	block = MAX_BLOCKTIME;
297	else
298	{	1597	{
299	block = timers [0]->at - ev_now + method_fudge;	1598	/* update time to cancel out callback processing overhead */
300	if (block < 0.) block = 0.;	1599	time_update (EV_A_ 1e100);
301	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;	1600
		1601	waittime = MAX_BLOCKTIME;
		1602
		1603	if (timercnt)
		1604	{
		1605	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
		1606	if (waittime > to) waittime = to;
		1607	}
		1608
		1609	#if EV_PERIODIC_ENABLE
		1610	if (periodiccnt)
		1611	{
		1612	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
		1613	if (waittime > to) waittime = to;
		1614	}
		1615	#endif
		1616
		1617	if (expect_false (waittime < timeout_blocktime))
		1618	waittime = timeout_blocktime;
		1619
		1620	sleeptime = waittime - backend_fudge;
		1621
		1622	if (expect_true (sleeptime > io_blocktime))
		1623	sleeptime = io_blocktime;
		1624
		1625	if (sleeptime)
		1626	{
		1627	ev_sleep (sleeptime);
		1628	waittime -= sleeptime;
		1629	}
302	}	1630	}
303		1631
304	method_poll (block);	1632	++loop_count;
		1633	backend_poll (EV_A_ waittime);
305		1634
		1635	/* update ev_rt_now, do magic */
		1636	time_update (EV_A_ waittime + sleeptime);
		1637	}
		1638
306	/* put pending timers into pendign queue and reschedule them */	1639	/* queue pending timers and reschedule them */
		1640	timers_reify (EV_A); /* relative timers called last */
		1641	#if EV_PERIODIC_ENABLE
		1642	periodics_reify (EV_A); /* absolute timers called first */
		1643	#endif
		1644
		1645	#if EV_IDLE_ENABLE
		1646	/* queue idle watchers unless other events are pending */
307	timer_reify ();	1647	idle_reify (EV_A);
		1648	#endif
308		1649
309	ev_now = ev_time ();	1650	/* queue check watchers, to be executed first */
		1651	if (expect_false (checkcnt))
		1652	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1653
310	call_pending ();	1654	call_pending (EV_A);
311	}
312	while (!ev_loop_done);
313	}
314		1655
315	static void	1656	}
316	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1657	while (expect_true (activecnt && !loop_done));
		1658
		1659	if (loop_done == EVUNLOOP_ONE)
		1660	loop_done = EVUNLOOP_CANCEL;
		1661	}
		1662
		1663	void
		1664	ev_unloop (EV_P_ int how)
		1665	{
		1666	loop_done = how;
		1667	}
		1668
		1669	/*****************************************************************************/
		1670
		1671	void inline_size
		1672	wlist_add (WL *head, WL elem)
317	{	1673	{
318	elem->next = *head;	1674	elem->next = *head;
319	*head = elem;	1675	*head = elem;
320	}	1676	}
321		1677
322	static void	1678	void inline_size
323	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1679	wlist_del (WL *head, WL elem)
324	{	1680	{
325	while (*head)	1681	while (*head)
326	{	1682	{
327	if (*head == elem)	1683	if (*head == elem)
328	{	1684	{
…		…
332		1688
333	head = &(*head)->next;	1689	head = &(*head)->next;
334	}	1690	}
335	}	1691	}
336		1692
		1693	void inline_speed
		1694	clear_pending (EV_P_ W w)
		1695	{
		1696	if (w->pending)
		1697	{
		1698	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1699	w->pending = 0;
		1700	}
		1701	}
		1702
		1703	int
		1704	ev_clear_pending (EV_P_ void *w)
		1705	{
		1706	W w_ = (W)w;
		1707	int pending = w_->pending;
		1708
		1709	if (expect_true (pending))
		1710	{
		1711	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1712	w_->pending = 0;
		1713	p->w = 0;
		1714	return p->events;
		1715	}
		1716	else
		1717	return 0;
		1718	}
		1719
		1720	void inline_size
		1721	pri_adjust (EV_P_ W w)
		1722	{
		1723	int pri = w->priority;
		1724	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1725	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1726	w->priority = pri;
		1727	}
		1728
		1729	void inline_speed
		1730	ev_start (EV_P_ W w, int active)
		1731	{
		1732	pri_adjust (EV_A_ w);
		1733	w->active = active;
		1734	ev_ref (EV_A);
		1735	}
		1736
		1737	void inline_size
		1738	ev_stop (EV_P_ W w)
		1739	{
		1740	ev_unref (EV_A);
		1741	w->active = 0;
		1742	}
		1743
		1744	/*****************************************************************************/
		1745
		1746	void noinline
		1747	ev_io_start (EV_P_ ev_io *w)
		1748	{
		1749	int fd = w->fd;
		1750
		1751	if (expect_false (ev_is_active (w)))
		1752	return;
		1753
		1754	assert (("ev_io_start called with negative fd", fd >= 0));
		1755
		1756	ev_start (EV_A_ (W)w, 1);
		1757	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1758	wlist_add (&anfds[fd].head, (WL)w);
		1759
		1760	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1761	w->events &= ~EV_IOFDSET;
		1762	}
		1763
		1764	void noinline
		1765	ev_io_stop (EV_P_ ev_io *w)
		1766	{
		1767	clear_pending (EV_A_ (W)w);
		1768	if (expect_false (!ev_is_active (w)))
		1769	return;
		1770
		1771	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1772
		1773	wlist_del (&anfds[w->fd].head, (WL)w);
		1774	ev_stop (EV_A_ (W)w);
		1775
		1776	fd_change (EV_A_ w->fd, 1);
		1777	}
		1778
		1779	void noinline
		1780	ev_timer_start (EV_P_ ev_timer *w)
		1781	{
		1782	if (expect_false (ev_is_active (w)))
		1783	return;
		1784
		1785	((WT)w)->at += mn_now;
		1786
		1787	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1788
		1789	ev_start (EV_A_ (W)w, ++timercnt);
		1790	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1791	timers [timercnt - 1] = (WT)w;
		1792	upheap (timers, timercnt - 1);
		1793
		1794	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1795	}
		1796
		1797	void noinline
		1798	ev_timer_stop (EV_P_ ev_timer *w)
		1799	{
		1800	clear_pending (EV_A_ (W)w);
		1801	if (expect_false (!ev_is_active (w)))
		1802	return;
		1803
		1804	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1805
		1806	{
		1807	int active = ((W)w)->active;
		1808
		1809	if (expect_true (--active < --timercnt))
		1810	{
		1811	timers [active] = timers [timercnt];
		1812	adjustheap (timers, timercnt, active);
		1813	}
		1814	}
		1815
		1816	((WT)w)->at -= mn_now;
		1817
		1818	ev_stop (EV_A_ (W)w);
		1819	}
		1820
		1821	void noinline
		1822	ev_timer_again (EV_P_ ev_timer *w)
		1823	{
		1824	if (ev_is_active (w))
		1825	{
		1826	if (w->repeat)
		1827	{
		1828	((WT)w)->at = mn_now + w->repeat;
		1829	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1830	}
		1831	else
		1832	ev_timer_stop (EV_A_ w);
		1833	}
		1834	else if (w->repeat)
		1835	{
		1836	w->at = w->repeat;
		1837	ev_timer_start (EV_A_ w);
		1838	}
		1839	}
		1840
		1841	#if EV_PERIODIC_ENABLE
		1842	void noinline
		1843	ev_periodic_start (EV_P_ ev_periodic *w)
		1844	{
		1845	if (expect_false (ev_is_active (w)))
		1846	return;
		1847
		1848	if (w->reschedule_cb)
		1849	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1850	else if (w->interval)
		1851	{
		1852	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1853	/* this formula differs from the one in periodic_reify because we do not always round up */
		1854	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1855	}
		1856	else
		1857	((WT)w)->at = w->offset;
		1858
		1859	ev_start (EV_A_ (W)w, ++periodiccnt);
		1860	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
		1861	periodics [periodiccnt - 1] = (WT)w;
		1862	upheap (periodics, periodiccnt - 1);
		1863
		1864	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1865	}
		1866
		1867	void noinline
		1868	ev_periodic_stop (EV_P_ ev_periodic *w)
		1869	{
		1870	clear_pending (EV_A_ (W)w);
		1871	if (expect_false (!ev_is_active (w)))
		1872	return;
		1873
		1874	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1875
		1876	{
		1877	int active = ((W)w)->active;
		1878
		1879	if (expect_true (--active < --periodiccnt))
		1880	{
		1881	periodics [active] = periodics [periodiccnt];
		1882	adjustheap (periodics, periodiccnt, active);
		1883	}
		1884	}
		1885
		1886	ev_stop (EV_A_ (W)w);
		1887	}
		1888
		1889	void noinline
		1890	ev_periodic_again (EV_P_ ev_periodic *w)
		1891	{
		1892	/* TODO: use adjustheap and recalculation */
		1893	ev_periodic_stop (EV_A_ w);
		1894	ev_periodic_start (EV_A_ w);
		1895	}
		1896	#endif
		1897
		1898	#ifndef SA_RESTART
		1899	# define SA_RESTART 0
		1900	#endif
		1901
		1902	void noinline
		1903	ev_signal_start (EV_P_ ev_signal *w)
		1904	{
		1905	#if EV_MULTIPLICITY
		1906	assert (("signal 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	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1912
		1913	evpipe_init (EV_A);
		1914
		1915	{
		1916	#ifndef _WIN32
		1917	sigset_t full, prev;
		1918	sigfillset (&full);
		1919	sigprocmask (SIG_SETMASK, &full, &prev);
		1920	#endif
		1921
		1922	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1923
		1924	#ifndef _WIN32
		1925	sigprocmask (SIG_SETMASK, &prev, 0);
		1926	#endif
		1927	}
		1928
		1929	ev_start (EV_A_ (W)w, 1);
		1930	wlist_add (&signals [w->signum - 1].head, (WL)w);
		1931
		1932	if (!((WL)w)->next)
		1933	{
		1934	#if _WIN32
		1935	signal (w->signum, sighandler);
		1936	#else
		1937	struct sigaction sa;
		1938	sa.sa_handler = sighandler;
		1939	sigfillset (&sa.sa_mask);
		1940	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1941	sigaction (w->signum, &sa, 0);
		1942	#endif
		1943	}
		1944	}
		1945
		1946	void noinline
		1947	ev_signal_stop (EV_P_ ev_signal *w)
		1948	{
		1949	clear_pending (EV_A_ (W)w);
		1950	if (expect_false (!ev_is_active (w)))
		1951	return;
		1952
		1953	wlist_del (&signals [w->signum - 1].head, (WL)w);
		1954	ev_stop (EV_A_ (W)w);
		1955
		1956	if (!signals [w->signum - 1].head)
		1957	signal (w->signum, SIG_DFL);
		1958	}
		1959
		1960	void
		1961	ev_child_start (EV_P_ ev_child *w)
		1962	{
		1963	#if EV_MULTIPLICITY
		1964	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1965	#endif
		1966	if (expect_false (ev_is_active (w)))
		1967	return;
		1968
		1969	ev_start (EV_A_ (W)w, 1);
		1970	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1971	}
		1972
		1973	void
		1974	ev_child_stop (EV_P_ ev_child *w)
		1975	{
		1976	clear_pending (EV_A_ (W)w);
		1977	if (expect_false (!ev_is_active (w)))
		1978	return;
		1979
		1980	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1981	ev_stop (EV_A_ (W)w);
		1982	}
		1983
		1984	#if EV_STAT_ENABLE
		1985
		1986	# ifdef _WIN32
		1987	# undef lstat
		1988	# define lstat(a,b) _stati64 (a,b)
		1989	# endif
		1990
		1991	#define DEF_STAT_INTERVAL 5.0074891
		1992	#define MIN_STAT_INTERVAL 0.1074891
		1993
		1994	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1995
		1996	#if EV_USE_INOTIFY
		1997	# define EV_INOTIFY_BUFSIZE 8192
		1998
		1999	static void noinline
		2000	infy_add (EV_P_ ev_stat *w)
		2001	{
		2002	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);
		2003
		2004	if (w->wd < 0)
		2005	{
		2006	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2007
		2008	/* monitor some parent directory for speedup hints */
		2009	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2010	{
		2011	char path [4096];
		2012	strcpy (path, w->path);
		2013
		2014	do
		2015	{
		2016	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2017	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2018
		2019	char *pend = strrchr (path, '/');
		2020
		2021	if (!pend)
		2022	break; /* whoops, no '/', complain to your admin */
		2023
		2024	*pend = 0;
		2025	w->wd = inotify_add_watch (fs_fd, path, mask);
		2026	}
		2027	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2028	}
		2029	}
		2030	else
		2031	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2032
		2033	if (w->wd >= 0)
		2034	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2035	}
		2036
		2037	static void noinline
		2038	infy_del (EV_P_ ev_stat *w)
		2039	{
		2040	int slot;
		2041	int wd = w->wd;
		2042
		2043	if (wd < 0)
		2044	return;
		2045
		2046	w->wd = -2;
		2047	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2048	wlist_del (&fs_hash [slot].head, (WL)w);
		2049
		2050	/* remove this watcher, if others are watching it, they will rearm */
		2051	inotify_rm_watch (fs_fd, wd);
		2052	}
		2053
		2054	static void noinline
		2055	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2056	{
		2057	if (slot < 0)
		2058	/* overflow, need to check for all hahs slots */
		2059	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2060	infy_wd (EV_A_ slot, wd, ev);
		2061	else
		2062	{
		2063	WL w_;
		2064
		2065	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2066	{
		2067	ev_stat *w = (ev_stat *)w_;
		2068	w_ = w_->next; /* lets us remove this watcher and all before it */
		2069
		2070	if (w->wd == wd || wd == -1)
		2071	{
		2072	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2073	{
		2074	w->wd = -1;
		2075	infy_add (EV_A_ w); /* re-add, no matter what */
		2076	}
		2077
		2078	stat_timer_cb (EV_A_ &w->timer, 0);
		2079	}
		2080	}
		2081	}
		2082	}
		2083
337	static void	2084	static void
338	ev_start (struct ev_watcher *w, int active)	2085	infy_cb (EV_P_ ev_io *w, int revents)
339	{	2086	{
340	w->pending = 0;	2087	char buf [EV_INOTIFY_BUFSIZE];
341	w->active = active;	2088	struct inotify_event *ev = (struct inotify_event *)buf;
		2089	int ofs;
		2090	int len = read (fs_fd, buf, sizeof (buf));
		2091
		2092	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2093	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2094	}
		2095
		2096	void inline_size
		2097	infy_init (EV_P)
		2098	{
		2099	if (fs_fd != -2)
		2100	return;
		2101
		2102	fs_fd = inotify_init ();
		2103
		2104	if (fs_fd >= 0)
		2105	{
		2106	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2107	ev_set_priority (&fs_w, EV_MAXPRI);
		2108	ev_io_start (EV_A_ &fs_w);
		2109	}
		2110	}
		2111
		2112	void inline_size
		2113	infy_fork (EV_P)
		2114	{
		2115	int slot;
		2116
		2117	if (fs_fd < 0)
		2118	return;
		2119
		2120	close (fs_fd);
		2121	fs_fd = inotify_init ();
		2122
		2123	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2124	{
		2125	WL w_ = fs_hash [slot].head;
		2126	fs_hash [slot].head = 0;
		2127
		2128	while (w_)
		2129	{
		2130	ev_stat *w = (ev_stat *)w_;
		2131	w_ = w_->next; /* lets us add this watcher */
		2132
		2133	w->wd = -1;
		2134
		2135	if (fs_fd >= 0)
		2136	infy_add (EV_A_ w); /* re-add, no matter what */
		2137	else
		2138	ev_timer_start (EV_A_ &w->timer);
		2139	}
		2140
		2141	}
		2142	}
		2143
		2144	#endif
		2145
		2146	void
		2147	ev_stat_stat (EV_P_ ev_stat *w)
		2148	{
		2149	if (lstat (w->path, &w->attr) < 0)
		2150	w->attr.st_nlink = 0;
		2151	else if (!w->attr.st_nlink)
		2152	w->attr.st_nlink = 1;
		2153	}
		2154
		2155	static void noinline
		2156	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2157	{
		2158	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2159
		2160	/* we copy this here each the time so that */
		2161	/* prev has the old value when the callback gets invoked */
		2162	w->prev = w->attr;
		2163	ev_stat_stat (EV_A_ w);
		2164
		2165	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2166	if (
		2167	w->prev.st_dev != w->attr.st_dev
		2168	|| w->prev.st_ino != w->attr.st_ino
		2169	|| w->prev.st_mode != w->attr.st_mode
		2170	|| w->prev.st_nlink != w->attr.st_nlink
		2171	|| w->prev.st_uid != w->attr.st_uid
		2172	|| w->prev.st_gid != w->attr.st_gid
		2173	|| w->prev.st_rdev != w->attr.st_rdev
		2174	|| w->prev.st_size != w->attr.st_size
		2175	|| w->prev.st_atime != w->attr.st_atime
		2176	|| w->prev.st_mtime != w->attr.st_mtime
		2177	|| w->prev.st_ctime != w->attr.st_ctime
		2178	) {
		2179	#if EV_USE_INOTIFY
		2180	infy_del (EV_A_ w);
		2181	infy_add (EV_A_ w);
		2182	ev_stat_stat (EV_A_ w); /* avoid race... */
		2183	#endif
		2184
		2185	ev_feed_event (EV_A_ w, EV_STAT);
		2186	}
		2187	}
		2188
		2189	void
		2190	ev_stat_start (EV_P_ ev_stat *w)
		2191	{
		2192	if (expect_false (ev_is_active (w)))
		2193	return;
		2194
		2195	/* since we use memcmp, we need to clear any padding data etc. */
		2196	memset (&w->prev, 0, sizeof (ev_statdata));
		2197	memset (&w->attr, 0, sizeof (ev_statdata));
		2198
		2199	ev_stat_stat (EV_A_ w);
		2200
		2201	if (w->interval < MIN_STAT_INTERVAL)
		2202	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2203
		2204	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2205	ev_set_priority (&w->timer, ev_priority (w));
		2206
		2207	#if EV_USE_INOTIFY
		2208	infy_init (EV_A);
		2209
		2210	if (fs_fd >= 0)
		2211	infy_add (EV_A_ w);
		2212	else
		2213	#endif
		2214	ev_timer_start (EV_A_ &w->timer);
		2215
		2216	ev_start (EV_A_ (W)w, 1);
		2217	}
		2218
		2219	void
		2220	ev_stat_stop (EV_P_ ev_stat *w)
		2221	{
		2222	clear_pending (EV_A_ (W)w);
		2223	if (expect_false (!ev_is_active (w)))
		2224	return;
		2225
		2226	#if EV_USE_INOTIFY
		2227	infy_del (EV_A_ w);
		2228	#endif
		2229	ev_timer_stop (EV_A_ &w->timer);
		2230
		2231	ev_stop (EV_A_ (W)w);
		2232	}
		2233	#endif
		2234
		2235	#if EV_IDLE_ENABLE
		2236	void
		2237	ev_idle_start (EV_P_ ev_idle *w)
		2238	{
		2239	if (expect_false (ev_is_active (w)))
		2240	return;
		2241
		2242	pri_adjust (EV_A_ (W)w);
		2243
		2244	{
		2245	int active = ++idlecnt [ABSPRI (w)];
		2246
		2247	++idleall;
		2248	ev_start (EV_A_ (W)w, active);
		2249
		2250	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2251	idles [ABSPRI (w)][active - 1] = w;
		2252	}
		2253	}
		2254
		2255	void
		2256	ev_idle_stop (EV_P_ ev_idle *w)
		2257	{
		2258	clear_pending (EV_A_ (W)w);
		2259	if (expect_false (!ev_is_active (w)))
		2260	return;
		2261
		2262	{
		2263	int active = ((W)w)->active;
		2264
		2265	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2266	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2267
		2268	ev_stop (EV_A_ (W)w);
		2269	--idleall;
		2270	}
		2271	}
		2272	#endif
		2273
		2274	void
		2275	ev_prepare_start (EV_P_ ev_prepare *w)
		2276	{
		2277	if (expect_false (ev_is_active (w)))
		2278	return;
		2279
		2280	ev_start (EV_A_ (W)w, ++preparecnt);
		2281	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2282	prepares [preparecnt - 1] = w;
		2283	}
		2284
		2285	void
		2286	ev_prepare_stop (EV_P_ ev_prepare *w)
		2287	{
		2288	clear_pending (EV_A_ (W)w);
		2289	if (expect_false (!ev_is_active (w)))
		2290	return;
		2291
		2292	{
		2293	int active = ((W)w)->active;
		2294	prepares [active - 1] = prepares [--preparecnt];
		2295	((W)prepares [active - 1])->active = active;
		2296	}
		2297
		2298	ev_stop (EV_A_ (W)w);
		2299	}
		2300
		2301	void
		2302	ev_check_start (EV_P_ ev_check *w)
		2303	{
		2304	if (expect_false (ev_is_active (w)))
		2305	return;
		2306
		2307	ev_start (EV_A_ (W)w, ++checkcnt);
		2308	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2309	checks [checkcnt - 1] = w;
		2310	}
		2311
		2312	void
		2313	ev_check_stop (EV_P_ ev_check *w)
		2314	{
		2315	clear_pending (EV_A_ (W)w);
		2316	if (expect_false (!ev_is_active (w)))
		2317	return;
		2318
		2319	{
		2320	int active = ((W)w)->active;
		2321	checks [active - 1] = checks [--checkcnt];
		2322	((W)checks [active - 1])->active = active;
		2323	}
		2324
		2325	ev_stop (EV_A_ (W)w);
		2326	}
		2327
		2328	#if EV_EMBED_ENABLE
		2329	void noinline
		2330	ev_embed_sweep (EV_P_ ev_embed *w)
		2331	{
		2332	ev_loop (w->other, EVLOOP_NONBLOCK);
342	}	2333	}
343		2334
344	static void	2335	static void
345	ev_stop (struct ev_watcher *w)	2336	embed_io_cb (EV_P_ ev_io *io, int revents)
346	{	2337	{
347	if (w->pending)	2338	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
348	pendings [w->pending - 1].w = 0;
349		2339
350	w->active = 0;
351	/* nop */
352	}
353
354	void
355	evio_start (struct ev_io *w)
356	{
357	if (ev_is_active (w))	2340	if (ev_cb (w))
358	return;	2341	ev_feed_event (EV_A_ (W)w, EV_EMBED);
359
360	int fd = w->fd;
361
362	ev_start ((struct ev_watcher *)w, 1);
363	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
364	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
365
366	++fdchangecnt;
367	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
368	fdchanges [fdchangecnt - 1] = fd;
369	}
370
371	void
372	evio_stop (struct ev_io *w)
373	{
374	if (!ev_is_active (w))
375	return;
376
377	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
378	ev_stop ((struct ev_watcher *)w);
379
380	++fdchangecnt;
381	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
382	fdchanges [fdchangecnt - 1] = w->fd;
383	}
384
385	void
386	evtimer_start (struct ev_timer *w)
387	{
388	if (ev_is_active (w))
389	return;
390
391	if (w->is_abs)
392	{
393	/* this formula differs from the one in timer_reify becuse we do not round up */
394	if (w->repeat)
395	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
396	}
397	else	2342	else
398	w->at += ev_now;	2343	ev_loop (w->other, EVLOOP_NONBLOCK);
399
400	ev_start ((struct ev_watcher *)w, ++timercnt);
401	array_needsize (timers, timermax, timercnt, );
402	timers [timercnt - 1] = w;
403	upheap (timercnt - 1);
404	}	2344	}
405		2345
406	void	2346	static void
407	evtimer_stop (struct ev_timer *w)	2347	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
408	{	2348	{
409	if (!ev_is_active (w))	2349	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
410	return;
411		2350
412	if (w->active < timercnt--)	2351	{
		2352	struct ev_loop *loop = w->other;
		2353
		2354	while (fdchangecnt)
413	{	2355	{
414	timers [w->active - 1] = timers [timercnt];	2356	fd_reify (EV_A);
415	downheap (w->active - 1);	2357	ev_loop (EV_A_ EVLOOP_NONBLOCK);
416	}	2358	}
417		2359	}
418	ev_stop ((struct ev_watcher *)w);
419	}	2360	}
420		2361
421	void	2362	#if 0
422	evsignal_start (struct ev_signal *w)	2363	static void
		2364	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
423	{	2365	{
		2366	ev_idle_stop (EV_A_ idle);
		2367	}
		2368	#endif
		2369
		2370	void
		2371	ev_embed_start (EV_P_ ev_embed *w)
		2372	{
424	if (ev_is_active (w))	2373	if (expect_false (ev_is_active (w)))
425	return;	2374	return;
426		2375
427	ev_start ((struct ev_watcher *)w, 1);	2376	{
428	array_needsize (signals, signalmax, w->signum, signals_init);	2377	struct ev_loop *loop = w->other;
429	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2378	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
430	}	2379	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2380	}
431		2381
		2382	ev_set_priority (&w->io, ev_priority (w));
		2383	ev_io_start (EV_A_ &w->io);
		2384
		2385	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2386	ev_set_priority (&w->prepare, EV_MINPRI);
		2387	ev_prepare_start (EV_A_ &w->prepare);
		2388
		2389	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2390
		2391	ev_start (EV_A_ (W)w, 1);
		2392	}
		2393
432	void	2394	void
433	evsignal_stop (struct ev_signal *w)	2395	ev_embed_stop (EV_P_ ev_embed *w)
434	{	2396	{
		2397	clear_pending (EV_A_ (W)w);
435	if (!ev_is_active (w))	2398	if (expect_false (!ev_is_active (w)))
436	return;	2399	return;
437		2400
438	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2401	ev_io_stop (EV_A_ &w->io);
439	ev_stop ((struct ev_watcher *)w);	2402	ev_prepare_stop (EV_A_ &w->prepare);
		2403
		2404	ev_stop (EV_A_ (W)w);
440	}	2405	}
		2406	#endif
		2407
		2408	#if EV_FORK_ENABLE
		2409	void
		2410	ev_fork_start (EV_P_ ev_fork *w)
		2411	{
		2412	if (expect_false (ev_is_active (w)))
		2413	return;
		2414
		2415	ev_start (EV_A_ (W)w, ++forkcnt);
		2416	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2417	forks [forkcnt - 1] = w;
		2418	}
		2419
		2420	void
		2421	ev_fork_stop (EV_P_ ev_fork *w)
		2422	{
		2423	clear_pending (EV_A_ (W)w);
		2424	if (expect_false (!ev_is_active (w)))
		2425	return;
		2426
		2427	{
		2428	int active = ((W)w)->active;
		2429	forks [active - 1] = forks [--forkcnt];
		2430	((W)forks [active - 1])->active = active;
		2431	}
		2432
		2433	ev_stop (EV_A_ (W)w);
		2434	}
		2435	#endif
		2436
		2437	#if EV_ASYNC_ENABLE
		2438	void
		2439	ev_async_start (EV_P_ ev_async *w)
		2440	{
		2441	if (expect_false (ev_is_active (w)))
		2442	return;
		2443
		2444	evpipe_init (EV_A);
		2445
		2446	ev_start (EV_A_ (W)w, ++asynccnt);
		2447	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2448	asyncs [asynccnt - 1] = w;
		2449	}
		2450
		2451	void
		2452	ev_async_stop (EV_P_ ev_async *w)
		2453	{
		2454	clear_pending (EV_A_ (W)w);
		2455	if (expect_false (!ev_is_active (w)))
		2456	return;
		2457
		2458	{
		2459	int active = ((W)w)->active;
		2460	asyncs [active - 1] = asyncs [--asynccnt];
		2461	((W)asyncs [active - 1])->active = active;
		2462	}
		2463
		2464	ev_stop (EV_A_ (W)w);
		2465	}
		2466
		2467	void
		2468	ev_async_send (EV_P_ ev_async *w)
		2469	{
		2470	w->sent = 1;
		2471	evpipe_write (EV_A_ &gotasync);
		2472	}
		2473	#endif
441		2474
442	/*****************************************************************************/	2475	/*****************************************************************************/
443	#if 1	2476
		2477	struct ev_once
		2478	{
		2479	ev_io io;
		2480	ev_timer to;
		2481	void (*cb)(int revents, void *arg);
		2482	void *arg;
		2483	};
444		2484
445	static void	2485	static void
446	sin_cb (struct ev_io *w, int revents)	2486	once_cb (EV_P_ struct ev_once *once, int revents)
447	{	2487	{
448	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2488	void (*cb)(int revents, void *arg) = once->cb;
		2489	void *arg = once->arg;
		2490
		2491	ev_io_stop (EV_A_ &once->io);
		2492	ev_timer_stop (EV_A_ &once->to);
		2493	ev_free (once);
		2494
		2495	cb (revents, arg);
449	}	2496	}
450		2497
451	static void	2498	static void
		2499	once_cb_io (EV_P_ ev_io *w, int revents)
		2500	{
		2501	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2502	}
		2503
		2504	static void
452	ocb (struct ev_timer *w, int revents)	2505	once_cb_to (EV_P_ ev_timer *w, int revents)
453	{	2506	{
454	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2507	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
455	}	2508	}
456		2509
457	int main (void)	2510	void
		2511	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
458	{	2512	{
459	struct ev_io sin;	2513	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
460		2514
461	ev_init (0);	2515	if (expect_false (!once))
462
463	evw_init (&sin, sin_cb, 55);
464	evio_set (&sin, 0, EV_READ);
465	evio_start (&sin);
466
467	struct ev_timer t[1000];
468
469	int i;
470	for (i = 0; i < 1000; ++i)
471	{
472	struct ev_timer *w = t + i;
473	evw_init (w, ocb, i);
474	evtimer_set_rel (w, drand48 (), 0);
475	evtimer_start (w);
476	if (drand48 () < 0.5)
477	evtimer_stop (w);
478	}	2516	{
479		2517	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
480	ev_loop (0);
481
482	return 0;	2518	return;
483	}	2519	}
484		2520
485	#endif	2521	once->cb = cb;
		2522	once->arg = arg;
486		2523
		2524	ev_init (&once->io, once_cb_io);
		2525	if (fd >= 0)
		2526	{
		2527	ev_io_set (&once->io, fd, events);
		2528	ev_io_start (EV_A_ &once->io);
		2529	}
487		2530
		2531	ev_init (&once->to, once_cb_to);
		2532	if (timeout >= 0.)
		2533	{
		2534	ev_timer_set (&once->to, timeout, 0.);
		2535	ev_timer_start (EV_A_ &once->to);
		2536	}
		2537	}
488		2538
		2539	#if EV_MULTIPLICITY
		2540	#include "ev_wrap.h"
		2541	#endif
489		2542
		2543	#ifdef __cplusplus
		2544	}
		2545	#endif
		2546

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