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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 1.197 by root, Sat Dec 22 15:20:13 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_NANOSLEEP
		60	# if HAVE_NANOSLEEP
		61	# define EV_USE_NANOSLEEP 1
		62	# else
		63	# define EV_USE_NANOSLEEP 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_SELECT
		68	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		69	# define EV_USE_SELECT 1
		70	# else
		71	# define EV_USE_SELECT 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_POLL
		76	# if HAVE_POLL && HAVE_POLL_H
		77	# define EV_USE_POLL 1
		78	# else
		79	# define EV_USE_POLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_EPOLL
		84	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		85	# define EV_USE_EPOLL 1
		86	# else
		87	# define EV_USE_EPOLL 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_KQUEUE
		92	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		93	# define EV_USE_KQUEUE 1
		94	# else
		95	# define EV_USE_KQUEUE 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_PORT
		100	# if HAVE_PORT_H && HAVE_PORT_CREATE
		101	# define EV_USE_PORT 1
		102	# else
		103	# define EV_USE_PORT 0
		104	# endif
		105	# endif
		106
		107	# ifndef EV_USE_INOTIFY
		108	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		109	# define EV_USE_INOTIFY 1
		110	# else
		111	# define EV_USE_INOTIFY 0
		112	# endif
		113	# endif
		114
		115	#endif
		116
1	#include <math.h>	117	#include <math.h>
2	#include <stdlib.h>	118	#include <stdlib.h>
		119	#include <fcntl.h>
		120	#include <stddef.h>
3		121
4	#include <stdio.h>	122	#include <stdio.h>
5		123
		124	#include <assert.h>
6	#include <errno.h>	125	#include <errno.h>
7	#include <sys/time.h>	126	#include <sys/types.h>
8	#include <time.h>	127	#include <time.h>
9		128
		129	#include <signal.h>
		130
		131	#ifdef EV_H
		132	# include EV_H
		133	#else
		134	# include "ev.h"
		135	#endif
		136
		137	#ifndef _WIN32
		138	# include <sys/time.h>
		139	# include <sys/wait.h>
		140	# include <unistd.h>
		141	#else
		142	# define WIN32_LEAN_AND_MEAN
		143	# include <windows.h>
		144	# ifndef EV_SELECT_IS_WINSOCKET
		145	# define EV_SELECT_IS_WINSOCKET 1
		146	# endif
		147	#endif
		148
		149	/**/
		150
		151	#ifndef EV_USE_MONOTONIC
		152	# define EV_USE_MONOTONIC 0
		153	#endif
		154
		155	#ifndef EV_USE_REALTIME
		156	# define EV_USE_REALTIME 0
		157	#endif
		158
		159	#ifndef EV_USE_NANOSLEEP
		160	# define EV_USE_NANOSLEEP 0
		161	#endif
		162
		163	#ifndef EV_USE_SELECT
		164	# define EV_USE_SELECT 1
		165	#endif
		166
		167	#ifndef EV_USE_POLL
		168	# ifdef _WIN32
		169	# define EV_USE_POLL 0
		170	# else
		171	# define EV_USE_POLL 1
		172	# endif
		173	#endif
		174
		175	#ifndef EV_USE_EPOLL
		176	# define EV_USE_EPOLL 0
		177	#endif
		178
		179	#ifndef EV_USE_KQUEUE
		180	# define EV_USE_KQUEUE 0
		181	#endif
		182
		183	#ifndef EV_USE_PORT
		184	# define EV_USE_PORT 0
		185	#endif
		186
		187	#ifndef EV_USE_INOTIFY
		188	# define EV_USE_INOTIFY 0
		189	#endif
		190
		191	#ifndef EV_PID_HASHSIZE
		192	# if EV_MINIMAL
		193	# define EV_PID_HASHSIZE 1
		194	# else
		195	# define EV_PID_HASHSIZE 16
		196	# endif
		197	#endif
		198
		199	#ifndef EV_INOTIFY_HASHSIZE
		200	# if EV_MINIMAL
		201	# define EV_INOTIFY_HASHSIZE 1
		202	# else
		203	# define EV_INOTIFY_HASHSIZE 16
		204	# endif
		205	#endif
		206
		207	/**/
		208
10	#ifdef CLOCK_MONOTONIC	209	#ifndef CLOCK_MONOTONIC
		210	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	211	# define EV_USE_MONOTONIC 0
		212	#endif
		213
		214	#ifndef CLOCK_REALTIME
		215	# undef EV_USE_REALTIME
		216	# define EV_USE_REALTIME 0
		217	#endif
		218
		219	#if !EV_STAT_ENABLE
		220	# undef EV_USE_INOTIFY
		221	# define EV_USE_INOTIFY 0
		222	#endif
		223
		224	#if !EV_USE_NANOSLEEP
		225	# ifndef _WIN32
		226	# include <sys/select.h>
12	#endif	227	# endif
		228	#endif
13		229
14	#define HAVE_EPOLL 1	230	#if EV_USE_INOTIFY
15	#define HAVE_REALTIME 1	231	# include <sys/inotify.h>
16	#define HAVE_SELECT 0	232	#endif
17		233
18	#define MAX_BLOCKTIME 60.	234	#if EV_SELECT_IS_WINSOCKET
		235	# include <winsock.h>
		236	#endif
19		237
		238	/**/
		239
		240	/*
		241	* This is used to avoid floating point rounding problems.
		242	* It is added to ev_rt_now when scheduling periodics
		243	* to ensure progress, time-wise, even when rounding
		244	* errors are against us.
		245	* This value is good at least till the year 4000.
		246	* Better solutions welcome.
		247	*/
		248	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		249
		250	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		251	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		252	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
		253
		254	#if __GNUC__ >= 4
		255	# define expect(expr,value) __builtin_expect ((expr),(value))
		256	# define noinline __attribute__ ((noinline))
		257	#else
		258	# define expect(expr,value) (expr)
		259	# define noinline
		260	# if __STDC_VERSION__ < 199901L
		261	# define inline
		262	# endif
		263	#endif
		264
		265	#define expect_false(expr) expect ((expr) != 0, 0)
		266	#define expect_true(expr) expect ((expr) != 0, 1)
		267	#define inline_size static inline
		268
		269	#if EV_MINIMAL
		270	# define inline_speed static noinline
		271	#else
		272	# define inline_speed static inline
		273	#endif
		274
		275	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		276	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		277
		278	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		279	#define EMPTY2(a,b) /* used to suppress some warnings */
		280
		281	typedef ev_watcher *W;
		282	typedef ev_watcher_list *WL;
		283	typedef ev_watcher_time *WT;
		284
		285	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		286	/* giving it a reasonably high chance of working on typical architetcures */
		287	static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		288
		289	#ifdef _WIN32
		290	# include "ev_win32.c"
		291	#endif
		292
		293	/*****************************************************************************/
		294
		295	static void (*syserr_cb)(const char *msg);
		296
		297	void
		298	ev_set_syserr_cb (void (*cb)(const char *msg))
		299	{
		300	syserr_cb = cb;
		301	}
		302
		303	static void noinline
		304	syserr (const char *msg)
		305	{
		306	if (!msg)
		307	msg = "(libev) system error";
		308
		309	if (syserr_cb)
		310	syserr_cb (msg);
		311	else
		312	{
		313	perror (msg);
		314	abort ();
		315	}
		316	}
		317
		318	static void *(*alloc)(void *ptr, long size);
		319
		320	void
		321	ev_set_allocator (void *(*cb)(void *ptr, long size))
		322	{
		323	alloc = cb;
		324	}
		325
		326	inline_speed void *
		327	ev_realloc (void *ptr, long size)
		328	{
		329	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		330
		331	if (!ptr && size)
		332	{
		333	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		334	abort ();
		335	}
		336
		337	return ptr;
		338	}
		339
		340	#define ev_malloc(size) ev_realloc (0, (size))
		341	#define ev_free(ptr) ev_realloc ((ptr), 0)
		342
		343	/*****************************************************************************/
		344
		345	typedef struct
		346	{
		347	WL head;
		348	unsigned char events;
		349	unsigned char reify;
		350	#if EV_SELECT_IS_WINSOCKET
		351	SOCKET handle;
		352	#endif
		353	} ANFD;
		354
		355	typedef struct
		356	{
		357	W w;
		358	int events;
		359	} ANPENDING;
		360
		361	#if EV_USE_INOTIFY
		362	typedef struct
		363	{
		364	WL head;
		365	} ANFS;
		366	#endif
		367
		368	#if EV_MULTIPLICITY
		369
		370	struct ev_loop
		371	{
		372	ev_tstamp ev_rt_now;
		373	#define ev_rt_now ((loop)->ev_rt_now)
		374	#define VAR(name,decl) decl;
		375	#include "ev_vars.h"
		376	#undef VAR
		377	};
20	#include "ev.h"	378	#include "ev_wrap.h"
21		379
22	struct ev_watcher {	380	static struct ev_loop default_loop_struct;
23	EV_WATCHER (ev_watcher);	381	struct ev_loop *ev_default_loop_ptr;
24	};
25		382
26	struct ev_watcher_list {	383	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		384
30	ev_tstamp ev_now;	385	ev_tstamp ev_rt_now;
31	int ev_method;	386	#define VAR(name,decl) static decl;
		387	#include "ev_vars.h"
		388	#undef VAR
32		389
33	static int have_monotonic; /* runtime */	390	static int ev_default_loop_ptr;
34		391
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	392	#endif
36	static void (*method_reify)(void);	393
37	static void (*method_poll)(ev_tstamp timeout);	394	/*****************************************************************************/
38		395
39	ev_tstamp	396	ev_tstamp
40	ev_time (void)	397	ev_time (void)
41	{	398	{
42	#if HAVE_REALTIME	399	#if EV_USE_REALTIME
43	struct timespec ts;	400	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	401	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	402	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	403	#else
47	struct timeval tv;	404	struct timeval tv;
48	gettimeofday (&tv, 0);	405	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	406	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	407	#endif
51	}	408	}
52		409
53	static ev_tstamp	410	ev_tstamp inline_size
54	get_clock (void)	411	get_clock (void)
55	{	412	{
56	#if HAVE_MONOTONIC	413	#if EV_USE_MONOTONIC
57	if (have_monotonic)	414	if (expect_true (have_monotonic))
58	{	415	{
59	struct timespec ts;	416	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	417	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	418	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	419	}
63	#endif	420	#endif
64		421
65	return ev_time ();	422	return ev_time ();
66	}	423	}
67		424
		425	#if EV_MULTIPLICITY
		426	ev_tstamp
		427	ev_now (EV_P)
		428	{
		429	return ev_rt_now;
		430	}
		431	#endif
		432
		433	void
		434	ev_sleep (ev_tstamp delay)
		435	{
		436	if (delay > 0.)
		437	{
		438	#if EV_USE_NANOSLEEP
		439	struct timespec ts;
		440
		441	ts.tv_sec = (time_t)delay;
		442	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		443
		444	nanosleep (&ts, 0);
		445	#elif defined(_WIN32)
		446	Sleep (delay * 1e3);
		447	#else
		448	struct timeval tv;
		449
		450	tv.tv_sec = (time_t)delay;
		451	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		452
		453	select (0, 0, 0, 0, &tv);
		454	#endif
		455	}
		456	}
		457
		458	/*****************************************************************************/
		459
		460	int inline_size
		461	array_nextsize (int elem, int cur, int cnt)
		462	{
		463	int ncur = cur + 1;
		464
		465	do
		466	ncur <<= 1;
		467	while (cnt > ncur);
		468
		469	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		470	if (elem * ncur > 4096)
		471	{
		472	ncur *= elem;
		473	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		474	ncur = ncur - sizeof (void *) * 4;
		475	ncur /= elem;
		476	}
		477
		478	return ncur;
		479	}
		480
		481	static noinline void *
		482	array_realloc (int elem, void *base, int *cur, int cnt)
		483	{
		484	*cur = array_nextsize (elem, *cur, cnt);
		485	return ev_realloc (base, elem * *cur);
		486	}
		487
68	#define array_needsize(base,cur,cnt,init) \	488	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	489	if (expect_false ((cnt) > (cur))) \
70	{ \	490	{ \
71	int newcnt = cur ? cur << 1 : 16; \	491	int ocur_ = (cur); \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	492	(base) = (type *)array_realloc \
73	base = realloc (base, sizeof (*base) * (newcnt)); \	493	(sizeof (type), (base), &(cur), (cnt)); \
74	init (base + cur, newcnt - cur); \	494	init ((base) + (ocur_), (cur) - ocur_); \
75	cur = newcnt; \	495	}
		496
		497	#if 0
		498	#define array_slim(type,stem) \
		499	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		500	{ \
		501	stem ## max = array_roundsize (stem ## cnt >> 1); \
		502	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		503	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		504	}
		505	#endif
		506
		507	#define array_free(stem, idx) \
		508	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		509
		510	/*****************************************************************************/
		511
		512	void noinline
		513	ev_feed_event (EV_P_ void *w, int revents)
		514	{
		515	W w_ = (W)w;
		516	int pri = ABSPRI (w_);
		517
		518	if (expect_false (w_->pending))
		519	pendings [pri][w_->pending - 1].events |= revents;
		520	else
		521	{
		522	w_->pending = ++pendingcnt [pri];
		523	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		524	pendings [pri][w_->pending - 1].w = w_;
		525	pendings [pri][w_->pending - 1].events = revents;
		526	}
		527	}
		528
		529	void inline_speed
		530	queue_events (EV_P_ W *events, int eventcnt, int type)
		531	{
		532	int i;
		533
		534	for (i = 0; i < eventcnt; ++i)
		535	ev_feed_event (EV_A_ events [i], type);
		536	}
		537
		538	/*****************************************************************************/
		539
		540	void inline_size
		541	anfds_init (ANFD *base, int count)
		542	{
		543	while (count--)
		544	{
		545	base->head = 0;
		546	base->events = EV_NONE;
		547	base->reify = 0;
		548
		549	++base;
		550	}
		551	}
		552
		553	void inline_speed
		554	fd_event (EV_P_ int fd, int revents)
		555	{
		556	ANFD *anfd = anfds + fd;
		557	ev_io *w;
		558
		559	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		560	{
		561	int ev = w->events & revents;
		562
		563	if (ev)
		564	ev_feed_event (EV_A_ (W)w, ev);
		565	}
		566	}
		567
		568	void
		569	ev_feed_fd_event (EV_P_ int fd, int revents)
		570	{
		571	if (fd >= 0 && fd < anfdmax)
		572	fd_event (EV_A_ fd, revents);
		573	}
		574
		575	void inline_size
		576	fd_reify (EV_P)
		577	{
		578	int i;
		579
		580	for (i = 0; i < fdchangecnt; ++i)
		581	{
		582	int fd = fdchanges [i];
		583	ANFD *anfd = anfds + fd;
		584	ev_io *w;
		585
		586	unsigned char events = 0;
		587
		588	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		589	events |= (unsigned char)w->events;
		590
		591	#if EV_SELECT_IS_WINSOCKET
		592	if (events)
		593	{
		594	unsigned long argp;
		595	anfd->handle = _get_osfhandle (fd);
		596	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		597	}
		598	#endif
		599
		600	{
		601	unsigned char o_events = anfd->events;
		602	unsigned char o_reify = anfd->reify;
		603
		604	anfd->reify = 0;
		605	anfd->events = events;
		606
		607	if (o_events != events || o_reify & EV_IOFDSET)
		608	backend_modify (EV_A_ fd, o_events, events);
76	}	609	}
		610	}
		611
		612	fdchangecnt = 0;
		613	}
		614
		615	void inline_size
		616	fd_change (EV_P_ int fd, int flags)
		617	{
		618	unsigned char reify = anfds [fd].reify;
		619	anfds [fd].reify |= flags;
		620
		621	if (expect_true (!reify))
		622	{
		623	++fdchangecnt;
		624	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		625	fdchanges [fdchangecnt - 1] = fd;
		626	}
		627	}
		628
		629	void inline_speed
		630	fd_kill (EV_P_ int fd)
		631	{
		632	ev_io *w;
		633
		634	while ((w = (ev_io *)anfds [fd].head))
		635	{
		636	ev_io_stop (EV_A_ w);
		637	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		638	}
		639	}
		640
		641	int inline_size
		642	fd_valid (int fd)
		643	{
		644	#ifdef _WIN32
		645	return _get_osfhandle (fd) != -1;
		646	#else
		647	return fcntl (fd, F_GETFD) != -1;
		648	#endif
		649	}
		650
		651	/* called on EBADF to verify fds */
		652	static void noinline
		653	fd_ebadf (EV_P)
		654	{
		655	int fd;
		656
		657	for (fd = 0; fd < anfdmax; ++fd)
		658	if (anfds [fd].events)
		659	if (!fd_valid (fd) == -1 && errno == EBADF)
		660	fd_kill (EV_A_ fd);
		661	}
		662
		663	/* called on ENOMEM in select/poll to kill some fds and retry */
		664	static void noinline
		665	fd_enomem (EV_P)
		666	{
		667	int fd;
		668
		669	for (fd = anfdmax; fd--; )
		670	if (anfds [fd].events)
		671	{
		672	fd_kill (EV_A_ fd);
		673	return;
		674	}
		675	}
		676
		677	/* usually called after fork if backend needs to re-arm all fds from scratch */
		678	static void noinline
		679	fd_rearm_all (EV_P)
		680	{
		681	int fd;
		682
		683	for (fd = 0; fd < anfdmax; ++fd)
		684	if (anfds [fd].events)
		685	{
		686	anfds [fd].events = 0;
		687	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		688	}
		689	}
		690
		691	/*****************************************************************************/
		692
		693	void inline_speed
		694	upheap (WT *heap, int k)
		695	{
		696	WT w = heap [k];
		697
		698	while (k)
		699	{
		700	int p = (k - 1) >> 1;
		701
		702	if (heap [p]->at <= w->at)
		703	break;
		704
		705	heap [k] = heap [p];
		706	((W)heap [k])->active = k + 1;
		707	k = p;
		708	}
		709
		710	heap [k] = w;
		711	((W)heap [k])->active = k + 1;
		712	}
		713
		714	void inline_speed
		715	downheap (WT *heap, int N, int k)
		716	{
		717	WT w = heap [k];
		718
		719	for (;;)
		720	{
		721	int c = (k << 1) + 1;
		722
		723	if (c >= N)
		724	break;
		725
		726	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		727	? 1 : 0;
		728
		729	if (w->at <= heap [c]->at)
		730	break;
		731
		732	heap [k] = heap [c];
		733	((W)heap [k])->active = k + 1;
		734
		735	k = c;
		736	}
		737
		738	heap [k] = w;
		739	((W)heap [k])->active = k + 1;
		740	}
		741
		742	void inline_size
		743	adjustheap (WT *heap, int N, int k)
		744	{
		745	upheap (heap, k);
		746	downheap (heap, N, k);
		747	}
		748
		749	/*****************************************************************************/
77		750
78	typedef struct	751	typedef struct
79	{	752	{
80	struct ev_io *head;	753	WL head;
81	unsigned char wev, rev; /* want, received event set */	754	sig_atomic_t volatile gotsig;
82	} ANFD;	755	} ANSIG;
83		756
84	static ANFD *anfds;	757	static ANSIG *signals;
85	static int anfdmax;	758	static int signalmax;
86		759
87	static int *fdchanges;	760	static int sigpipe [2];
88	static int fdchangemax, fdchangecnt;	761	static sig_atomic_t volatile gotsig;
		762	static ev_io sigev;
		763
		764	void inline_size
		765	signals_init (ANSIG *base, int count)
		766	{
		767	while (count--)
		768	{
		769	base->head = 0;
		770	base->gotsig = 0;
		771
		772	++base;
		773	}
		774	}
89		775
90	static void	776	static void
91	anfds_init (ANFD *base, int count)	777	sighandler (int signum)
92	{	778	{
93	while (count--)	779	#if _WIN32
94	{	780	signal (signum, sighandler);
95	base->head = 0;	781	#endif
96	base->wev = base->rev = EV_NONE;	782
97	++base;	783	signals [signum - 1].gotsig = 1;
		784
		785	if (!gotsig)
98	}	786	{
		787	int old_errno = errno;
		788	gotsig = 1;
		789	write (sigpipe [1], &signum, 1);
		790	errno = old_errno;
		791	}
99	}	792	}
100		793
101	typedef struct	794	void noinline
		795	ev_feed_signal_event (EV_P_ int signum)
102	{	796	{
103	struct ev_watcher *w;	797	WL w;
104	int events;
105	} ANPENDING;
106		798
107	static ANPENDING *pendings;	799	#if EV_MULTIPLICITY
108	static int pendingmax, pendingcnt;	800	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		801	#endif
		802
		803	--signum;
		804
		805	if (signum < 0 || signum >= signalmax)
		806	return;
		807
		808	signals [signum].gotsig = 0;
		809
		810	for (w = signals [signum].head; w; w = w->next)
		811	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		812	}
109		813
110	static void	814	static void
111	event (struct ev_watcher *w, int events)	815	sigcb (EV_P_ ev_io *iow, int revents)
112	{	816	{
113	w->pending = ++pendingcnt;	817	int signum;
114	array_needsize (pendings, pendingmax, pendingcnt, );	818
115	pendings [pendingcnt - 1].w = w;	819	read (sigpipe [0], &revents, 1);
116	pendings [pendingcnt - 1].events = events;	820	gotsig = 0;
		821
		822	for (signum = signalmax; signum--; )
		823	if (signals [signum].gotsig)
		824	ev_feed_signal_event (EV_A_ signum + 1);
117	}	825	}
		826
		827	void inline_speed
		828	fd_intern (int fd)
		829	{
		830	#ifdef _WIN32
		831	int arg = 1;
		832	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		833	#else
		834	fcntl (fd, F_SETFD, FD_CLOEXEC);
		835	fcntl (fd, F_SETFL, O_NONBLOCK);
		836	#endif
		837	}
		838
		839	static void noinline
		840	siginit (EV_P)
		841	{
		842	fd_intern (sigpipe [0]);
		843	fd_intern (sigpipe [1]);
		844
		845	ev_io_set (&sigev, sigpipe [0], EV_READ);
		846	ev_io_start (EV_A_ &sigev);
		847	ev_unref (EV_A); /* child watcher should not keep loop alive */
		848	}
		849
		850	/*****************************************************************************/
		851
		852	static WL childs [EV_PID_HASHSIZE];
		853
		854	#ifndef _WIN32
		855
		856	static ev_signal childev;
		857
		858	void inline_speed
		859	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		860	{
		861	ev_child *w;
		862
		863	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		864	if (w->pid == pid || !w->pid)
		865	{
		866	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		867	w->rpid = pid;
		868	w->rstatus = status;
		869	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		870	}
		871	}
		872
		873	#ifndef WCONTINUED
		874	# define WCONTINUED 0
		875	#endif
118		876
119	static void	877	static void
120	fd_event (int fd, int events)	878	childcb (EV_P_ ev_signal *sw, int revents)
121	{	879	{
122	ANFD *anfd = anfds + fd;	880	int pid, status;
123	struct ev_io *w;
124		881
125	for (w = anfd->head; w; w = w->next)	882	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
126	{	883	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
127	int ev = w->events & events;	884	if (!WCONTINUED
		885	|| errno != EINVAL
		886	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		887	return;
128		888
129	if (ev)	889	/* make sure we are called again until all childs have been reaped */
130	event ((struct ev_watcher *)w, ev);	890	/* we need to do it this way so that the callback gets called before we continue */
131	}	891	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
132	}
133		892
134	static struct ev_timer **timers;	893	child_reap (EV_A_ sw, pid, pid, status);
135	static int timermax, timercnt;	894	if (EV_PID_HASHSIZE > 1)
136		895	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
137	static void
138	upheap (int k)
139	{
140	struct ev_timer *w = timers [k];
141
142	while (k && timers [k >> 1]->at > w->at)
143	{
144	timers [k] = timers [k >> 1];
145	timers [k]->active = k + 1;
146	k >>= 1;
147	}
148
149	timers [k] = w;
150	timers [k]->active = k + 1;
151
152	}	896	}
153		897
154	static void	898	#endif
155	downheap (int k)
156	{
157	struct ev_timer *w = timers [k];
158		899
159	while (k < (timercnt >> 1))	900	/*****************************************************************************/
160	{
161	int j = k << 1;
162		901
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	902	#if EV_USE_PORT
164	++j;	903	# include "ev_port.c"
165		904	#endif
166	if (w->at <= timers [j]->at)	905	#if EV_USE_KQUEUE
167	break;	906	# include "ev_kqueue.c"
168		907	#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	908	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	909	# include "ev_epoll.c"
190	#endif	910	#endif
		911	#if EV_USE_POLL
		912	# include "ev_poll.c"
		913	#endif
191	#if HAVE_SELECT	914	#if EV_USE_SELECT
192	# include "ev_select.c"	915	# include "ev_select.c"
193	#endif	916	#endif
194		917
195	int ev_init (int flags)	918	int
		919	ev_version_major (void)
196	{	920	{
		921	return EV_VERSION_MAJOR;
		922	}
		923
		924	int
		925	ev_version_minor (void)
		926	{
		927	return EV_VERSION_MINOR;
		928	}
		929
		930	/* return true if we are running with elevated privileges and should ignore env variables */
		931	int inline_size
		932	enable_secure (void)
		933	{
		934	#ifdef _WIN32
		935	return 0;
		936	#else
		937	return getuid () != geteuid ()
		938	|| getgid () != getegid ();
		939	#endif
		940	}
		941
		942	unsigned int
		943	ev_supported_backends (void)
		944	{
		945	unsigned int flags = 0;
		946
		947	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		948	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		949	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		950	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		951	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		952
		953	return flags;
		954	}
		955
		956	unsigned int
		957	ev_recommended_backends (void)
		958	{
		959	unsigned int flags = ev_supported_backends ();
		960
		961	#ifndef __NetBSD__
		962	/* kqueue is borked on everything but netbsd apparently */
		963	/* it usually doesn't work correctly on anything but sockets and pipes */
		964	flags &= ~EVBACKEND_KQUEUE;
		965	#endif
		966	#ifdef __APPLE__
		967	// flags &= ~EVBACKEND_KQUEUE; for documentation
		968	flags &= ~EVBACKEND_POLL;
		969	#endif
		970
		971	return flags;
		972	}
		973
		974	unsigned int
		975	ev_embeddable_backends (void)
		976	{
		977	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		978
		979	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		980	/* please fix it and tell me how to detect the fix */
		981	flags &= ~EVBACKEND_EPOLL;
		982
		983	return flags;
		984	}
		985
		986	unsigned int
		987	ev_backend (EV_P)
		988	{
		989	return backend;
		990	}
		991
		992	unsigned int
		993	ev_loop_count (EV_P)
		994	{
		995	return loop_count;
		996	}
		997
		998	void
		999	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1000	{
		1001	io_blocktime = interval;
		1002	}
		1003
		1004	void
		1005	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1006	{
		1007	timeout_blocktime = interval;
		1008	}
		1009
		1010	static void noinline
		1011	loop_init (EV_P_ unsigned int flags)
		1012	{
		1013	if (!backend)
		1014	{
197	#if HAVE_MONOTONIC	1015	#if EV_USE_MONOTONIC
198	{	1016	{
199	struct timespec ts;	1017	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1018	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	1019	have_monotonic = 1;
202	}	1020	}
203	#endif	1021	#endif
204		1022
205	ev_now = ev_time ();	1023	ev_rt_now = ev_time ();
		1024	mn_now = get_clock ();
		1025	now_floor = mn_now;
		1026	rtmn_diff = ev_rt_now - mn_now;
206		1027
		1028	io_blocktime = 0.;
		1029	timeout_blocktime = 0.;
		1030
		1031	/* pid check not overridable via env */
		1032	#ifndef _WIN32
		1033	if (flags & EVFLAG_FORKCHECK)
		1034	curpid = getpid ();
		1035	#endif
		1036
		1037	if (!(flags & EVFLAG_NOENV)
		1038	&& !enable_secure ()
		1039	&& getenv ("LIBEV_FLAGS"))
		1040	flags = atoi (getenv ("LIBEV_FLAGS"));
		1041
		1042	if (!(flags & 0x0000ffffUL))
		1043	flags |= ev_recommended_backends ();
		1044
		1045	backend = 0;
		1046	backend_fd = -1;
		1047	#if EV_USE_INOTIFY
		1048	fs_fd = -2;
		1049	#endif
		1050
		1051	#if EV_USE_PORT
		1052	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1053	#endif
		1054	#if EV_USE_KQUEUE
		1055	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1056	#endif
207	#if HAVE_EPOLL	1057	#if EV_USE_EPOLL
208	if (epoll_init (flags))	1058	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
209	return ev_method;
210	#endif	1059	#endif
		1060	#if EV_USE_POLL
		1061	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1062	#endif
211	#if HAVE_SELECT	1063	#if EV_USE_SELECT
212	if (select_init (flags))	1064	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
213	return ev_method;
214	#endif	1065	#endif
215		1066
216	ev_method = EVMETHOD_NONE;	1067	ev_init (&sigev, sigcb);
217	return ev_method;	1068	ev_set_priority (&sigev, EV_MAXPRI);
		1069	}
218	}	1070	}
219		1071
220	void ev_prefork (void)	1072	static void noinline
221	{	1073	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	{	1074	{
238	int i;	1075	int i;
239		1076
240	for (i = 0; i < pendingcnt; ++i)	1077	#if EV_USE_INOTIFY
		1078	if (fs_fd >= 0)
		1079	close (fs_fd);
		1080	#endif
		1081
		1082	if (backend_fd >= 0)
		1083	close (backend_fd);
		1084
		1085	#if EV_USE_PORT
		1086	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1087	#endif
		1088	#if EV_USE_KQUEUE
		1089	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1090	#endif
		1091	#if EV_USE_EPOLL
		1092	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1093	#endif
		1094	#if EV_USE_POLL
		1095	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1096	#endif
		1097	#if EV_USE_SELECT
		1098	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1099	#endif
		1100
		1101	for (i = NUMPRI; i--; )
		1102	{
		1103	array_free (pending, [i]);
		1104	#if EV_IDLE_ENABLE
		1105	array_free (idle, [i]);
		1106	#endif
241	{	1107	}
242	ANPENDING *p = pendings + i;
243		1108
244	if (p->w)	1109	ev_free (anfds); anfdmax = 0;
		1110
		1111	/* have to use the microsoft-never-gets-it-right macro */
		1112	array_free (fdchange, EMPTY);
		1113	array_free (timer, EMPTY);
		1114	#if EV_PERIODIC_ENABLE
		1115	array_free (periodic, EMPTY);
		1116	#endif
		1117	#if EV_FORK_ENABLE
		1118	array_free (fork, EMPTY);
		1119	#endif
		1120	array_free (prepare, EMPTY);
		1121	array_free (check, EMPTY);
		1122
		1123	backend = 0;
		1124	}
		1125
		1126	void inline_size infy_fork (EV_P);
		1127
		1128	void inline_size
		1129	loop_fork (EV_P)
		1130	{
		1131	#if EV_USE_PORT
		1132	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1133	#endif
		1134	#if EV_USE_KQUEUE
		1135	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1136	#endif
		1137	#if EV_USE_EPOLL
		1138	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1139	#endif
		1140	#if EV_USE_INOTIFY
		1141	infy_fork (EV_A);
		1142	#endif
		1143
		1144	if (ev_is_active (&sigev))
		1145	{
		1146	/* default loop */
		1147
		1148	ev_ref (EV_A);
		1149	ev_io_stop (EV_A_ &sigev);
		1150	close (sigpipe [0]);
		1151	close (sigpipe [1]);
		1152
		1153	while (pipe (sigpipe))
		1154	syserr ("(libev) error creating pipe");
		1155
		1156	siginit (EV_A);
		1157	}
		1158
		1159	postfork = 0;
		1160	}
		1161
		1162	#if EV_MULTIPLICITY
		1163	struct ev_loop *
		1164	ev_loop_new (unsigned int flags)
		1165	{
		1166	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1167
		1168	memset (loop, 0, sizeof (struct ev_loop));
		1169
		1170	loop_init (EV_A_ flags);
		1171
		1172	if (ev_backend (EV_A))
		1173	return loop;
		1174
		1175	return 0;
		1176	}
		1177
		1178	void
		1179	ev_loop_destroy (EV_P)
		1180	{
		1181	loop_destroy (EV_A);
		1182	ev_free (loop);
		1183	}
		1184
		1185	void
		1186	ev_loop_fork (EV_P)
		1187	{
		1188	postfork = 1;
		1189	}
		1190
		1191	#endif
		1192
		1193	#if EV_MULTIPLICITY
		1194	struct ev_loop *
		1195	ev_default_loop_init (unsigned int flags)
		1196	#else
		1197	int
		1198	ev_default_loop (unsigned int flags)
		1199	#endif
		1200	{
		1201	if (sigpipe [0] == sigpipe [1])
		1202	if (pipe (sigpipe))
		1203	return 0;
		1204
		1205	if (!ev_default_loop_ptr)
		1206	{
		1207	#if EV_MULTIPLICITY
		1208	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1209	#else
		1210	ev_default_loop_ptr = 1;
		1211	#endif
		1212
		1213	loop_init (EV_A_ flags);
		1214
		1215	if (ev_backend (EV_A))
245	{	1216	{
246	p->w->pending = 0;	1217	siginit (EV_A);
247	p->w->cb (p->w, p->events);	1218
		1219	#ifndef _WIN32
		1220	ev_signal_init (&childev, childcb, SIGCHLD);
		1221	ev_set_priority (&childev, EV_MAXPRI);
		1222	ev_signal_start (EV_A_ &childev);
		1223	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1224	#endif
248	}	1225	}
		1226	else
		1227	ev_default_loop_ptr = 0;
		1228	}
		1229
		1230	return ev_default_loop_ptr;
		1231	}
		1232
		1233	void
		1234	ev_default_destroy (void)
		1235	{
		1236	#if EV_MULTIPLICITY
		1237	struct ev_loop *loop = ev_default_loop_ptr;
		1238	#endif
		1239
		1240	#ifndef _WIN32
		1241	ev_ref (EV_A); /* child watcher */
		1242	ev_signal_stop (EV_A_ &childev);
		1243	#endif
		1244
		1245	ev_ref (EV_A); /* signal watcher */
		1246	ev_io_stop (EV_A_ &sigev);
		1247
		1248	close (sigpipe [0]); sigpipe [0] = 0;
		1249	close (sigpipe [1]); sigpipe [1] = 0;
		1250
		1251	loop_destroy (EV_A);
		1252	}
		1253
		1254	void
		1255	ev_default_fork (void)
		1256	{
		1257	#if EV_MULTIPLICITY
		1258	struct ev_loop *loop = ev_default_loop_ptr;
		1259	#endif
		1260
		1261	if (backend)
		1262	postfork = 1;
		1263	}
		1264
		1265	/*****************************************************************************/
		1266
		1267	void
		1268	ev_invoke (EV_P_ void *w, int revents)
		1269	{
		1270	EV_CB_INVOKE ((W)w, revents);
		1271	}
		1272
		1273	void inline_speed
		1274	call_pending (EV_P)
		1275	{
		1276	int pri;
		1277
		1278	for (pri = NUMPRI; pri--; )
		1279	while (pendingcnt [pri])
		1280	{
		1281	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1282
		1283	if (expect_true (p->w))
		1284	{
		1285	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1286
		1287	p->w->pending = 0;
		1288	EV_CB_INVOKE (p->w, p->events);
		1289	}
249	}	1290	}
250
251	pendingcnt = 0;
252	}	1291	}
253		1292
254	static void	1293	void inline_size
255	timer_reify (void)	1294	timers_reify (EV_P)
256	{	1295	{
257	while (timercnt && timers [0]->at <= ev_now)	1296	while (timercnt && ((WT)timers [0])->at <= mn_now)
258	{	1297	{
259	struct ev_timer *w = timers [0];	1298	ev_timer *w = (ev_timer *)timers [0];
260		1299
		1300	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
		1301
261	/* first reschedule timer */	1302	/* first reschedule or stop timer */
262	if (w->repeat)	1303	if (w->repeat)
263	{	1304	{
264	if (w->is_abs)	1305	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;	1306
266	else
267	w->at = ev_now + w->repeat;	1307	((WT)w)->at += w->repeat;
		1308	if (((WT)w)->at < mn_now)
		1309	((WT)w)->at = mn_now;
268		1310
269	downheap (0);	1311	downheap (timers, timercnt, 0);
270	}	1312	}
271	else	1313	else
272	evtimer_stop (w); /* nonrepeating: stop timer */	1314	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
273		1315
274	event ((struct ev_watcher *)w, EV_TIMEOUT);	1316	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1317	}
		1318	}
		1319
		1320	#if EV_PERIODIC_ENABLE
		1321	void inline_size
		1322	periodics_reify (EV_P)
		1323	{
		1324	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
275	}	1325	{
276	}	1326	ev_periodic *w = (ev_periodic *)periodics [0];
277		1327
278	int ev_loop_done;	1328	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
279		1329
		1330	/* first reschedule or stop timer */
		1331	if (w->reschedule_cb)
		1332	{
		1333	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1334	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1335	downheap (periodics, periodiccnt, 0);
		1336	}
		1337	else if (w->interval)
		1338	{
		1339	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1340	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1341	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1342	downheap (periodics, periodiccnt, 0);
		1343	}
		1344	else
		1345	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1346
		1347	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1348	}
		1349	}
		1350
		1351	static void noinline
		1352	periodics_reschedule (EV_P)
		1353	{
		1354	int i;
		1355
		1356	/* adjust periodics after time jump */
		1357	for (i = 0; i < periodiccnt; ++i)
		1358	{
		1359	ev_periodic *w = (ev_periodic *)periodics [i];
		1360
		1361	if (w->reschedule_cb)
		1362	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1363	else if (w->interval)
		1364	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1365	}
		1366
		1367	/* now rebuild the heap */
		1368	for (i = periodiccnt >> 1; i--; )
		1369	downheap (periodics, periodiccnt, i);
		1370	}
		1371	#endif
		1372
		1373	#if EV_IDLE_ENABLE
		1374	void inline_size
		1375	idle_reify (EV_P)
		1376	{
		1377	if (expect_false (idleall))
		1378	{
		1379	int pri;
		1380
		1381	for (pri = NUMPRI; pri--; )
		1382	{
		1383	if (pendingcnt [pri])
		1384	break;
		1385
		1386	if (idlecnt [pri])
		1387	{
		1388	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1389	break;
		1390	}
		1391	}
		1392	}
		1393	}
		1394	#endif
		1395
		1396	void inline_speed
		1397	time_update (EV_P_ ev_tstamp max_block)
		1398	{
		1399	int i;
		1400
		1401	#if EV_USE_MONOTONIC
		1402	if (expect_true (have_monotonic))
		1403	{
		1404	ev_tstamp odiff = rtmn_diff;
		1405
		1406	mn_now = get_clock ();
		1407
		1408	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1409	/* interpolate in the meantime */
		1410	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1411	{
		1412	ev_rt_now = rtmn_diff + mn_now;
		1413	return;
		1414	}
		1415
		1416	now_floor = mn_now;
		1417	ev_rt_now = ev_time ();
		1418
		1419	/* loop a few times, before making important decisions.
		1420	* on the choice of "4": one iteration isn't enough,
		1421	* in case we get preempted during the calls to
		1422	* ev_time and get_clock. a second call is almost guaranteed
		1423	* to succeed in that case, though. and looping a few more times
		1424	* doesn't hurt either as we only do this on time-jumps or
		1425	* in the unlikely event of having been preempted here.
		1426	*/
		1427	for (i = 4; --i; )
		1428	{
		1429	rtmn_diff = ev_rt_now - mn_now;
		1430
		1431	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1432	return; /* all is well */
		1433
		1434	ev_rt_now = ev_time ();
		1435	mn_now = get_clock ();
		1436	now_floor = mn_now;
		1437	}
		1438
		1439	# if EV_PERIODIC_ENABLE
		1440	periodics_reschedule (EV_A);
		1441	# endif
		1442	/* no timer adjustment, as the monotonic clock doesn't jump */
		1443	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1444	}
		1445	else
		1446	#endif
		1447	{
		1448	ev_rt_now = ev_time ();
		1449
		1450	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1451	{
		1452	#if EV_PERIODIC_ENABLE
		1453	periodics_reschedule (EV_A);
		1454	#endif
		1455	/* adjust timers. this is easy, as the offset is the same for all of them */
		1456	for (i = 0; i < timercnt; ++i)
		1457	((WT)timers [i])->at += ev_rt_now - mn_now;
		1458	}
		1459
		1460	mn_now = ev_rt_now;
		1461	}
		1462	}
		1463
		1464	void
		1465	ev_ref (EV_P)
		1466	{
		1467	++activecnt;
		1468	}
		1469
		1470	void
		1471	ev_unref (EV_P)
		1472	{
		1473	--activecnt;
		1474	}
		1475
		1476	static int loop_done;
		1477
		1478	void
280	int ev_loop (int flags)	1479	ev_loop (EV_P_ int flags)
281	{	1480	{
282	double block;
283	ev_loop_done = flags & EVLOOP_ONESHOT;	1481	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1482	? EVUNLOOP_ONE
		1483	: EVUNLOOP_CANCEL;
		1484
		1485	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
284		1486
285	do	1487	do
286	{	1488	{
		1489	#ifndef _WIN32
		1490	if (expect_false (curpid)) /* penalise the forking check even more */
		1491	if (expect_false (getpid () != curpid))
		1492	{
		1493	curpid = getpid ();
		1494	postfork = 1;
		1495	}
		1496	#endif
		1497
		1498	#if EV_FORK_ENABLE
		1499	/* we might have forked, so queue fork handlers */
		1500	if (expect_false (postfork))
		1501	if (forkcnt)
		1502	{
		1503	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1504	call_pending (EV_A);
		1505	}
		1506	#endif
		1507
		1508	/* queue prepare watchers (and execute them) */
		1509	if (expect_false (preparecnt))
		1510	{
		1511	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1512	call_pending (EV_A);
		1513	}
		1514
		1515	if (expect_false (!activecnt))
		1516	break;
		1517
		1518	/* we might have forked, so reify kernel state if necessary */
		1519	if (expect_false (postfork))
		1520	loop_fork (EV_A);
		1521
287	/* update fd-related kernel structures */	1522	/* update fd-related kernel structures */
288	method_reify (); fdchangecnt = 0;	1523	fd_reify (EV_A);
289		1524
290	/* calculate blocking time */	1525	/* calculate blocking time */
291	ev_now = ev_time ();	1526	{
		1527	ev_tstamp waittime = 0.;
		1528	ev_tstamp sleeptime = 0.;
292		1529
293	if (flags & EVLOOP_NONBLOCK)	1530	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
294	block = 0.;
295	else if (!timercnt)
296	block = MAX_BLOCKTIME;
297	else
298	{	1531	{
299	block = timers [0]->at - ev_now + method_fudge;	1532	/* update time to cancel out callback processing overhead */
300	if (block < 0.) block = 0.;	1533	time_update (EV_A_ 1e100);
301	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;	1534
		1535	waittime = MAX_BLOCKTIME;
		1536
		1537	if (timercnt)
		1538	{
		1539	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
		1540	if (waittime > to) waittime = to;
		1541	}
		1542
		1543	#if EV_PERIODIC_ENABLE
		1544	if (periodiccnt)
		1545	{
		1546	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
		1547	if (waittime > to) waittime = to;
		1548	}
		1549	#endif
		1550
		1551	if (expect_false (waittime < timeout_blocktime))
		1552	waittime = timeout_blocktime;
		1553
		1554	sleeptime = waittime - backend_fudge;
		1555
		1556	if (expect_true (sleeptime > io_blocktime))
		1557	sleeptime = io_blocktime;
		1558
		1559	if (sleeptime)
		1560	{
		1561	ev_sleep (sleeptime);
		1562	waittime -= sleeptime;
		1563	}
302	}	1564	}
303		1565
304	method_poll (block);	1566	++loop_count;
		1567	backend_poll (EV_A_ waittime);
305		1568
		1569	/* update ev_rt_now, do magic */
		1570	time_update (EV_A_ waittime + sleeptime);
		1571	}
		1572
306	/* put pending timers into pendign queue and reschedule them */	1573	/* queue pending timers and reschedule them */
		1574	timers_reify (EV_A); /* relative timers called last */
		1575	#if EV_PERIODIC_ENABLE
		1576	periodics_reify (EV_A); /* absolute timers called first */
		1577	#endif
		1578
		1579	#if EV_IDLE_ENABLE
		1580	/* queue idle watchers unless other events are pending */
307	timer_reify ();	1581	idle_reify (EV_A);
		1582	#endif
308		1583
309	ev_now = ev_time ();	1584	/* queue check watchers, to be executed first */
		1585	if (expect_false (checkcnt))
		1586	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1587
310	call_pending ();	1588	call_pending (EV_A);
311	}
312	while (!ev_loop_done);
313	}
314		1589
315	static void	1590	}
316	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1591	while (expect_true (activecnt && !loop_done));
		1592
		1593	if (loop_done == EVUNLOOP_ONE)
		1594	loop_done = EVUNLOOP_CANCEL;
		1595	}
		1596
		1597	void
		1598	ev_unloop (EV_P_ int how)
		1599	{
		1600	loop_done = how;
		1601	}
		1602
		1603	/*****************************************************************************/
		1604
		1605	void inline_size
		1606	wlist_add (WL *head, WL elem)
317	{	1607	{
318	elem->next = *head;	1608	elem->next = *head;
319	*head = elem;	1609	*head = elem;
320	}	1610	}
321		1611
322	static void	1612	void inline_size
323	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1613	wlist_del (WL *head, WL elem)
324	{	1614	{
325	while (*head)	1615	while (*head)
326	{	1616	{
327	if (*head == elem)	1617	if (*head == elem)
328	{	1618	{
…		…
332		1622
333	head = &(*head)->next;	1623	head = &(*head)->next;
334	}	1624	}
335	}	1625	}
336		1626
		1627	void inline_speed
		1628	clear_pending (EV_P_ W w)
		1629	{
		1630	if (w->pending)
		1631	{
		1632	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1633	w->pending = 0;
		1634	}
		1635	}
		1636
		1637	int
		1638	ev_clear_pending (EV_P_ void *w)
		1639	{
		1640	W w_ = (W)w;
		1641	int pending = w_->pending;
		1642
		1643	if (expect_true (pending))
		1644	{
		1645	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1646	w_->pending = 0;
		1647	p->w = 0;
		1648	return p->events;
		1649	}
		1650	else
		1651	return 0;
		1652	}
		1653
		1654	void inline_size
		1655	pri_adjust (EV_P_ W w)
		1656	{
		1657	int pri = w->priority;
		1658	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1659	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1660	w->priority = pri;
		1661	}
		1662
		1663	void inline_speed
		1664	ev_start (EV_P_ W w, int active)
		1665	{
		1666	pri_adjust (EV_A_ w);
		1667	w->active = active;
		1668	ev_ref (EV_A);
		1669	}
		1670
		1671	void inline_size
		1672	ev_stop (EV_P_ W w)
		1673	{
		1674	ev_unref (EV_A);
		1675	w->active = 0;
		1676	}
		1677
		1678	/*****************************************************************************/
		1679
		1680	void noinline
		1681	ev_io_start (EV_P_ ev_io *w)
		1682	{
		1683	int fd = w->fd;
		1684
		1685	if (expect_false (ev_is_active (w)))
		1686	return;
		1687
		1688	assert (("ev_io_start called with negative fd", fd >= 0));
		1689
		1690	ev_start (EV_A_ (W)w, 1);
		1691	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1692	wlist_add (&anfds[fd].head, (WL)w);
		1693
		1694	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1695	w->events &= ~EV_IOFDSET;
		1696	}
		1697
		1698	void noinline
		1699	ev_io_stop (EV_P_ ev_io *w)
		1700	{
		1701	clear_pending (EV_A_ (W)w);
		1702	if (expect_false (!ev_is_active (w)))
		1703	return;
		1704
		1705	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1706
		1707	wlist_del (&anfds[w->fd].head, (WL)w);
		1708	ev_stop (EV_A_ (W)w);
		1709
		1710	fd_change (EV_A_ w->fd, 1);
		1711	}
		1712
		1713	void noinline
		1714	ev_timer_start (EV_P_ ev_timer *w)
		1715	{
		1716	if (expect_false (ev_is_active (w)))
		1717	return;
		1718
		1719	((WT)w)->at += mn_now;
		1720
		1721	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1722
		1723	ev_start (EV_A_ (W)w, ++timercnt);
		1724	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1725	timers [timercnt - 1] = (WT)w;
		1726	upheap (timers, timercnt - 1);
		1727
		1728	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1729	}
		1730
		1731	void noinline
		1732	ev_timer_stop (EV_P_ ev_timer *w)
		1733	{
		1734	clear_pending (EV_A_ (W)w);
		1735	if (expect_false (!ev_is_active (w)))
		1736	return;
		1737
		1738	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1739
		1740	{
		1741	int active = ((W)w)->active;
		1742
		1743	if (expect_true (--active < --timercnt))
		1744	{
		1745	timers [active] = timers [timercnt];
		1746	adjustheap (timers, timercnt, active);
		1747	}
		1748	}
		1749
		1750	((WT)w)->at -= mn_now;
		1751
		1752	ev_stop (EV_A_ (W)w);
		1753	}
		1754
		1755	void noinline
		1756	ev_timer_again (EV_P_ ev_timer *w)
		1757	{
		1758	if (ev_is_active (w))
		1759	{
		1760	if (w->repeat)
		1761	{
		1762	((WT)w)->at = mn_now + w->repeat;
		1763	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1764	}
		1765	else
		1766	ev_timer_stop (EV_A_ w);
		1767	}
		1768	else if (w->repeat)
		1769	{
		1770	w->at = w->repeat;
		1771	ev_timer_start (EV_A_ w);
		1772	}
		1773	}
		1774
		1775	#if EV_PERIODIC_ENABLE
		1776	void noinline
		1777	ev_periodic_start (EV_P_ ev_periodic *w)
		1778	{
		1779	if (expect_false (ev_is_active (w)))
		1780	return;
		1781
		1782	if (w->reschedule_cb)
		1783	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1784	else if (w->interval)
		1785	{
		1786	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1787	/* this formula differs from the one in periodic_reify because we do not always round up */
		1788	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1789	}
		1790	else
		1791	((WT)w)->at = w->offset;
		1792
		1793	ev_start (EV_A_ (W)w, ++periodiccnt);
		1794	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
		1795	periodics [periodiccnt - 1] = (WT)w;
		1796	upheap (periodics, periodiccnt - 1);
		1797
		1798	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1799	}
		1800
		1801	void noinline
		1802	ev_periodic_stop (EV_P_ ev_periodic *w)
		1803	{
		1804	clear_pending (EV_A_ (W)w);
		1805	if (expect_false (!ev_is_active (w)))
		1806	return;
		1807
		1808	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1809
		1810	{
		1811	int active = ((W)w)->active;
		1812
		1813	if (expect_true (--active < --periodiccnt))
		1814	{
		1815	periodics [active] = periodics [periodiccnt];
		1816	adjustheap (periodics, periodiccnt, active);
		1817	}
		1818	}
		1819
		1820	ev_stop (EV_A_ (W)w);
		1821	}
		1822
		1823	void noinline
		1824	ev_periodic_again (EV_P_ ev_periodic *w)
		1825	{
		1826	/* TODO: use adjustheap and recalculation */
		1827	ev_periodic_stop (EV_A_ w);
		1828	ev_periodic_start (EV_A_ w);
		1829	}
		1830	#endif
		1831
		1832	#ifndef SA_RESTART
		1833	# define SA_RESTART 0
		1834	#endif
		1835
		1836	void noinline
		1837	ev_signal_start (EV_P_ ev_signal *w)
		1838	{
		1839	#if EV_MULTIPLICITY
		1840	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1841	#endif
		1842	if (expect_false (ev_is_active (w)))
		1843	return;
		1844
		1845	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1846
		1847	{
		1848	#ifndef _WIN32
		1849	sigset_t full, prev;
		1850	sigfillset (&full);
		1851	sigprocmask (SIG_SETMASK, &full, &prev);
		1852	#endif
		1853
		1854	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1855
		1856	#ifndef _WIN32
		1857	sigprocmask (SIG_SETMASK, &prev, 0);
		1858	#endif
		1859	}
		1860
		1861	ev_start (EV_A_ (W)w, 1);
		1862	wlist_add (&signals [w->signum - 1].head, (WL)w);
		1863
		1864	if (!((WL)w)->next)
		1865	{
		1866	#if _WIN32
		1867	signal (w->signum, sighandler);
		1868	#else
		1869	struct sigaction sa;
		1870	sa.sa_handler = sighandler;
		1871	sigfillset (&sa.sa_mask);
		1872	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1873	sigaction (w->signum, &sa, 0);
		1874	#endif
		1875	}
		1876	}
		1877
		1878	void noinline
		1879	ev_signal_stop (EV_P_ ev_signal *w)
		1880	{
		1881	clear_pending (EV_A_ (W)w);
		1882	if (expect_false (!ev_is_active (w)))
		1883	return;
		1884
		1885	wlist_del (&signals [w->signum - 1].head, (WL)w);
		1886	ev_stop (EV_A_ (W)w);
		1887
		1888	if (!signals [w->signum - 1].head)
		1889	signal (w->signum, SIG_DFL);
		1890	}
		1891
		1892	void
		1893	ev_child_start (EV_P_ ev_child *w)
		1894	{
		1895	#if EV_MULTIPLICITY
		1896	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1897	#endif
		1898	if (expect_false (ev_is_active (w)))
		1899	return;
		1900
		1901	ev_start (EV_A_ (W)w, 1);
		1902	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1903	}
		1904
		1905	void
		1906	ev_child_stop (EV_P_ ev_child *w)
		1907	{
		1908	clear_pending (EV_A_ (W)w);
		1909	if (expect_false (!ev_is_active (w)))
		1910	return;
		1911
		1912	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1913	ev_stop (EV_A_ (W)w);
		1914	}
		1915
		1916	#if EV_STAT_ENABLE
		1917
		1918	# ifdef _WIN32
		1919	# undef lstat
		1920	# define lstat(a,b) _stati64 (a,b)
		1921	# endif
		1922
		1923	#define DEF_STAT_INTERVAL 5.0074891
		1924	#define MIN_STAT_INTERVAL 0.1074891
		1925
		1926	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1927
		1928	#if EV_USE_INOTIFY
		1929	# define EV_INOTIFY_BUFSIZE 8192
		1930
		1931	static void noinline
		1932	infy_add (EV_P_ ev_stat *w)
		1933	{
		1934	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);
		1935
		1936	if (w->wd < 0)
		1937	{
		1938	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1939
		1940	/* monitor some parent directory for speedup hints */
		1941	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1942	{
		1943	char path [4096];
		1944	strcpy (path, w->path);
		1945
		1946	do
		1947	{
		1948	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1949	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1950
		1951	char *pend = strrchr (path, '/');
		1952
		1953	if (!pend)
		1954	break; /* whoops, no '/', complain to your admin */
		1955
		1956	*pend = 0;
		1957	w->wd = inotify_add_watch (fs_fd, path, mask);
		1958	}
		1959	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1960	}
		1961	}
		1962	else
		1963	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1964
		1965	if (w->wd >= 0)
		1966	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1967	}
		1968
		1969	static void noinline
		1970	infy_del (EV_P_ ev_stat *w)
		1971	{
		1972	int slot;
		1973	int wd = w->wd;
		1974
		1975	if (wd < 0)
		1976	return;
		1977
		1978	w->wd = -2;
		1979	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1980	wlist_del (&fs_hash [slot].head, (WL)w);
		1981
		1982	/* remove this watcher, if others are watching it, they will rearm */
		1983	inotify_rm_watch (fs_fd, wd);
		1984	}
		1985
		1986	static void noinline
		1987	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1988	{
		1989	if (slot < 0)
		1990	/* overflow, need to check for all hahs slots */
		1991	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1992	infy_wd (EV_A_ slot, wd, ev);
		1993	else
		1994	{
		1995	WL w_;
		1996
		1997	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1998	{
		1999	ev_stat *w = (ev_stat *)w_;
		2000	w_ = w_->next; /* lets us remove this watcher and all before it */
		2001
		2002	if (w->wd == wd || wd == -1)
		2003	{
		2004	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2005	{
		2006	w->wd = -1;
		2007	infy_add (EV_A_ w); /* re-add, no matter what */
		2008	}
		2009
		2010	stat_timer_cb (EV_A_ &w->timer, 0);
		2011	}
		2012	}
		2013	}
		2014	}
		2015
337	static void	2016	static void
338	ev_start (struct ev_watcher *w, int active)	2017	infy_cb (EV_P_ ev_io *w, int revents)
339	{	2018	{
340	w->pending = 0;	2019	char buf [EV_INOTIFY_BUFSIZE];
341	w->active = active;	2020	struct inotify_event *ev = (struct inotify_event *)buf;
		2021	int ofs;
		2022	int len = read (fs_fd, buf, sizeof (buf));
		2023
		2024	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2025	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2026	}
		2027
		2028	void inline_size
		2029	infy_init (EV_P)
		2030	{
		2031	if (fs_fd != -2)
		2032	return;
		2033
		2034	fs_fd = inotify_init ();
		2035
		2036	if (fs_fd >= 0)
		2037	{
		2038	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2039	ev_set_priority (&fs_w, EV_MAXPRI);
		2040	ev_io_start (EV_A_ &fs_w);
		2041	}
		2042	}
		2043
		2044	void inline_size
		2045	infy_fork (EV_P)
		2046	{
		2047	int slot;
		2048
		2049	if (fs_fd < 0)
		2050	return;
		2051
		2052	close (fs_fd);
		2053	fs_fd = inotify_init ();
		2054
		2055	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2056	{
		2057	WL w_ = fs_hash [slot].head;
		2058	fs_hash [slot].head = 0;
		2059
		2060	while (w_)
		2061	{
		2062	ev_stat *w = (ev_stat *)w_;
		2063	w_ = w_->next; /* lets us add this watcher */
		2064
		2065	w->wd = -1;
		2066
		2067	if (fs_fd >= 0)
		2068	infy_add (EV_A_ w); /* re-add, no matter what */
		2069	else
		2070	ev_timer_start (EV_A_ &w->timer);
		2071	}
		2072
		2073	}
		2074	}
		2075
		2076	#endif
		2077
		2078	void
		2079	ev_stat_stat (EV_P_ ev_stat *w)
		2080	{
		2081	if (lstat (w->path, &w->attr) < 0)
		2082	w->attr.st_nlink = 0;
		2083	else if (!w->attr.st_nlink)
		2084	w->attr.st_nlink = 1;
		2085	}
		2086
		2087	static void noinline
		2088	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2089	{
		2090	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2091
		2092	/* we copy this here each the time so that */
		2093	/* prev has the old value when the callback gets invoked */
		2094	w->prev = w->attr;
		2095	ev_stat_stat (EV_A_ w);
		2096
		2097	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2098	if (
		2099	w->prev.st_dev != w->attr.st_dev
		2100	|| w->prev.st_ino != w->attr.st_ino
		2101	|| w->prev.st_mode != w->attr.st_mode
		2102	|| w->prev.st_nlink != w->attr.st_nlink
		2103	|| w->prev.st_uid != w->attr.st_uid
		2104	|| w->prev.st_gid != w->attr.st_gid
		2105	|| w->prev.st_rdev != w->attr.st_rdev
		2106	|| w->prev.st_size != w->attr.st_size
		2107	|| w->prev.st_atime != w->attr.st_atime
		2108	|| w->prev.st_mtime != w->attr.st_mtime
		2109	|| w->prev.st_ctime != w->attr.st_ctime
		2110	) {
		2111	#if EV_USE_INOTIFY
		2112	infy_del (EV_A_ w);
		2113	infy_add (EV_A_ w);
		2114	ev_stat_stat (EV_A_ w); /* avoid race... */
		2115	#endif
		2116
		2117	ev_feed_event (EV_A_ w, EV_STAT);
		2118	}
		2119	}
		2120
		2121	void
		2122	ev_stat_start (EV_P_ ev_stat *w)
		2123	{
		2124	if (expect_false (ev_is_active (w)))
		2125	return;
		2126
		2127	/* since we use memcmp, we need to clear any padding data etc. */
		2128	memset (&w->prev, 0, sizeof (ev_statdata));
		2129	memset (&w->attr, 0, sizeof (ev_statdata));
		2130
		2131	ev_stat_stat (EV_A_ w);
		2132
		2133	if (w->interval < MIN_STAT_INTERVAL)
		2134	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2135
		2136	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2137	ev_set_priority (&w->timer, ev_priority (w));
		2138
		2139	#if EV_USE_INOTIFY
		2140	infy_init (EV_A);
		2141
		2142	if (fs_fd >= 0)
		2143	infy_add (EV_A_ w);
		2144	else
		2145	#endif
		2146	ev_timer_start (EV_A_ &w->timer);
		2147
		2148	ev_start (EV_A_ (W)w, 1);
		2149	}
		2150
		2151	void
		2152	ev_stat_stop (EV_P_ ev_stat *w)
		2153	{
		2154	clear_pending (EV_A_ (W)w);
		2155	if (expect_false (!ev_is_active (w)))
		2156	return;
		2157
		2158	#if EV_USE_INOTIFY
		2159	infy_del (EV_A_ w);
		2160	#endif
		2161	ev_timer_stop (EV_A_ &w->timer);
		2162
		2163	ev_stop (EV_A_ (W)w);
		2164	}
		2165	#endif
		2166
		2167	#if EV_IDLE_ENABLE
		2168	void
		2169	ev_idle_start (EV_P_ ev_idle *w)
		2170	{
		2171	if (expect_false (ev_is_active (w)))
		2172	return;
		2173
		2174	pri_adjust (EV_A_ (W)w);
		2175
		2176	{
		2177	int active = ++idlecnt [ABSPRI (w)];
		2178
		2179	++idleall;
		2180	ev_start (EV_A_ (W)w, active);
		2181
		2182	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2183	idles [ABSPRI (w)][active - 1] = w;
		2184	}
		2185	}
		2186
		2187	void
		2188	ev_idle_stop (EV_P_ ev_idle *w)
		2189	{
		2190	clear_pending (EV_A_ (W)w);
		2191	if (expect_false (!ev_is_active (w)))
		2192	return;
		2193
		2194	{
		2195	int active = ((W)w)->active;
		2196
		2197	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2198	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2199
		2200	ev_stop (EV_A_ (W)w);
		2201	--idleall;
		2202	}
		2203	}
		2204	#endif
		2205
		2206	void
		2207	ev_prepare_start (EV_P_ ev_prepare *w)
		2208	{
		2209	if (expect_false (ev_is_active (w)))
		2210	return;
		2211
		2212	ev_start (EV_A_ (W)w, ++preparecnt);
		2213	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2214	prepares [preparecnt - 1] = w;
		2215	}
		2216
		2217	void
		2218	ev_prepare_stop (EV_P_ ev_prepare *w)
		2219	{
		2220	clear_pending (EV_A_ (W)w);
		2221	if (expect_false (!ev_is_active (w)))
		2222	return;
		2223
		2224	{
		2225	int active = ((W)w)->active;
		2226	prepares [active - 1] = prepares [--preparecnt];
		2227	((W)prepares [active - 1])->active = active;
		2228	}
		2229
		2230	ev_stop (EV_A_ (W)w);
		2231	}
		2232
		2233	void
		2234	ev_check_start (EV_P_ ev_check *w)
		2235	{
		2236	if (expect_false (ev_is_active (w)))
		2237	return;
		2238
		2239	ev_start (EV_A_ (W)w, ++checkcnt);
		2240	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2241	checks [checkcnt - 1] = w;
		2242	}
		2243
		2244	void
		2245	ev_check_stop (EV_P_ ev_check *w)
		2246	{
		2247	clear_pending (EV_A_ (W)w);
		2248	if (expect_false (!ev_is_active (w)))
		2249	return;
		2250
		2251	{
		2252	int active = ((W)w)->active;
		2253	checks [active - 1] = checks [--checkcnt];
		2254	((W)checks [active - 1])->active = active;
		2255	}
		2256
		2257	ev_stop (EV_A_ (W)w);
		2258	}
		2259
		2260	#if EV_EMBED_ENABLE
		2261	void noinline
		2262	ev_embed_sweep (EV_P_ ev_embed *w)
		2263	{
		2264	ev_loop (w->other, EVLOOP_NONBLOCK);
342	}	2265	}
343		2266
344	static void	2267	static void
345	ev_stop (struct ev_watcher *w)	2268	embed_io_cb (EV_P_ ev_io *io, int revents)
346	{	2269	{
347	if (w->pending)	2270	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
348	pendings [w->pending - 1].w = 0;
349		2271
350	w->active = 0;
351	/* nop */
352	}
353
354	void
355	evio_start (struct ev_io *w)
356	{
357	if (ev_is_active (w))	2272	if (ev_cb (w))
358	return;	2273	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	2274	else
398	w->at += ev_now;	2275	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	}	2276	}
405		2277
406	void	2278	static void
407	evtimer_stop (struct ev_timer *w)	2279	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
408	{	2280	{
409	if (!ev_is_active (w))	2281	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
410	return;
411		2282
412	if (w->active < timercnt--)	2283	{
		2284	struct ev_loop *loop = w->other;
		2285
		2286	while (fdchangecnt)
413	{	2287	{
414	timers [w->active - 1] = timers [timercnt];	2288	fd_reify (EV_A);
415	downheap (w->active - 1);	2289	ev_loop (EV_A_ EVLOOP_NONBLOCK);
416	}	2290	}
417		2291	}
418	ev_stop ((struct ev_watcher *)w);
419	}	2292	}
420		2293
421	void	2294	#if 0
422	evsignal_start (struct ev_signal *w)	2295	static void
		2296	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
423	{	2297	{
		2298	ev_idle_stop (EV_A_ idle);
		2299	}
		2300	#endif
		2301
		2302	void
		2303	ev_embed_start (EV_P_ ev_embed *w)
		2304	{
424	if (ev_is_active (w))	2305	if (expect_false (ev_is_active (w)))
425	return;	2306	return;
426		2307
427	ev_start ((struct ev_watcher *)w, 1);	2308	{
428	array_needsize (signals, signalmax, w->signum, signals_init);	2309	struct ev_loop *loop = w->other;
429	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2310	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
430	}	2311	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2312	}
431		2313
		2314	ev_set_priority (&w->io, ev_priority (w));
		2315	ev_io_start (EV_A_ &w->io);
		2316
		2317	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2318	ev_set_priority (&w->prepare, EV_MINPRI);
		2319	ev_prepare_start (EV_A_ &w->prepare);
		2320
		2321	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2322
		2323	ev_start (EV_A_ (W)w, 1);
		2324	}
		2325
432	void	2326	void
433	evsignal_stop (struct ev_signal *w)	2327	ev_embed_stop (EV_P_ ev_embed *w)
434	{	2328	{
		2329	clear_pending (EV_A_ (W)w);
435	if (!ev_is_active (w))	2330	if (expect_false (!ev_is_active (w)))
436	return;	2331	return;
437		2332
438	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2333	ev_io_stop (EV_A_ &w->io);
439	ev_stop ((struct ev_watcher *)w);	2334	ev_prepare_stop (EV_A_ &w->prepare);
		2335
		2336	ev_stop (EV_A_ (W)w);
440	}	2337	}
		2338	#endif
		2339
		2340	#if EV_FORK_ENABLE
		2341	void
		2342	ev_fork_start (EV_P_ ev_fork *w)
		2343	{
		2344	if (expect_false (ev_is_active (w)))
		2345	return;
		2346
		2347	ev_start (EV_A_ (W)w, ++forkcnt);
		2348	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2349	forks [forkcnt - 1] = w;
		2350	}
		2351
		2352	void
		2353	ev_fork_stop (EV_P_ ev_fork *w)
		2354	{
		2355	clear_pending (EV_A_ (W)w);
		2356	if (expect_false (!ev_is_active (w)))
		2357	return;
		2358
		2359	{
		2360	int active = ((W)w)->active;
		2361	forks [active - 1] = forks [--forkcnt];
		2362	((W)forks [active - 1])->active = active;
		2363	}
		2364
		2365	ev_stop (EV_A_ (W)w);
		2366	}
		2367	#endif
441		2368
442	/*****************************************************************************/	2369	/*****************************************************************************/
443	#if 1	2370
		2371	struct ev_once
		2372	{
		2373	ev_io io;
		2374	ev_timer to;
		2375	void (*cb)(int revents, void *arg);
		2376	void *arg;
		2377	};
444		2378
445	static void	2379	static void
446	sin_cb (struct ev_io *w, int revents)	2380	once_cb (EV_P_ struct ev_once *once, int revents)
447	{	2381	{
448	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2382	void (*cb)(int revents, void *arg) = once->cb;
		2383	void *arg = once->arg;
		2384
		2385	ev_io_stop (EV_A_ &once->io);
		2386	ev_timer_stop (EV_A_ &once->to);
		2387	ev_free (once);
		2388
		2389	cb (revents, arg);
449	}	2390	}
450		2391
451	static void	2392	static void
		2393	once_cb_io (EV_P_ ev_io *w, int revents)
		2394	{
		2395	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2396	}
		2397
		2398	static void
452	ocb (struct ev_timer *w, int revents)	2399	once_cb_to (EV_P_ ev_timer *w, int revents)
453	{	2400	{
454	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2401	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
455	}	2402	}
456		2403
457	int main (void)	2404	void
		2405	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
458	{	2406	{
459	struct ev_io sin;	2407	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
460		2408
461	ev_init (0);	2409	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	}	2410	{
479		2411	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
480	ev_loop (0);
481
482	return 0;	2412	return;
483	}	2413	}
484		2414
485	#endif	2415	once->cb = cb;
		2416	once->arg = arg;
486		2417
		2418	ev_init (&once->io, once_cb_io);
		2419	if (fd >= 0)
		2420	{
		2421	ev_io_set (&once->io, fd, events);
		2422	ev_io_start (EV_A_ &once->io);
		2423	}
487		2424
		2425	ev_init (&once->to, once_cb_to);
		2426	if (timeout >= 0.)
		2427	{
		2428	ev_timer_set (&once->to, timeout, 0.);
		2429	ev_timer_start (EV_A_ &once->to);
		2430	}
		2431	}
488		2432
		2433	#if EV_MULTIPLICITY
		2434	#include "ev_wrap.h"
		2435	#endif
489		2436
		2437	#ifdef __cplusplus
		2438	}
		2439	#endif
		2440

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