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Comparing libev/ev.c (file contents):
Revision 1.4 by root, Tue Oct 30 23:10:33 2007 UTC vs.
Revision 1.150 by root, Tue Nov 27 19:41:52 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_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	#endif
		100
1	#include <math.h>	101	#include <math.h>
2	#include <stdlib.h>	102	#include <stdlib.h>
		103	#include <fcntl.h>
		104	#include <stddef.h>
3		105
4	#include <stdio.h>	106	#include <stdio.h>
5		107
6	#include <assert.h>	108	#include <assert.h>
7	#include <errno.h>	109	#include <errno.h>
8	#include <sys/time.h>	110	#include <sys/types.h>
9	#include <time.h>	111	#include <time.h>
10		112
		113	#include <signal.h>
		114
		115	#ifndef _WIN32
		116	# include <sys/time.h>
		117	# include <sys/wait.h>
		118	# include <unistd.h>
		119	#else
		120	# define WIN32_LEAN_AND_MEAN
		121	# include <windows.h>
		122	# ifndef EV_SELECT_IS_WINSOCKET
		123	# define EV_SELECT_IS_WINSOCKET 1
		124	# endif
		125	#endif
		126
		127	/**/
		128
		129	#ifndef EV_USE_MONOTONIC
		130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
		135	#endif
		136
		137	#ifndef EV_USE_SELECT
		138	# define EV_USE_SELECT 1
		139	#endif
		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
		146	# endif
		147	#endif
		148
		149	#ifndef EV_USE_EPOLL
		150	# define EV_USE_EPOLL 0
		151	#endif
		152
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
		157	#ifndef EV_USE_PORT
		158	# define EV_USE_PORT 0
		159	#endif
		160
		161	#ifndef EV_PID_HASHSIZE
		162	# if EV_MINIMAL
		163	# define EV_PID_HASHSIZE 1
		164	# else
		165	# define EV_PID_HASHSIZE 16
		166	# endif
		167	#endif
		168
		169	/**/
		170
11	#ifdef CLOCK_MONOTONIC	171	#ifndef CLOCK_MONOTONIC
		172	# undef EV_USE_MONOTONIC
12	# define HAVE_MONOTONIC 1	173	# define EV_USE_MONOTONIC 0
13	#endif	174	#endif
14		175
15	#define HAVE_EPOLL 1	176	#ifndef CLOCK_REALTIME
		177	# undef EV_USE_REALTIME
16	#define HAVE_REALTIME 1	178	# define EV_USE_REALTIME 0
17	#define HAVE_SELECT 0	179	#endif
		180
		181	#if EV_SELECT_IS_WINSOCKET
		182	# include <winsock.h>
		183	#endif
		184
		185	/**/
18		186
19	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	187	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
20	#define MAX_BLOCKTIME 60.	188	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		189	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
21		190
		191	#ifdef EV_H
		192	# include EV_H
		193	#else
22	#include "ev.h"	194	# include "ev.h"
		195	#endif
23		196
24	struct ev_watcher {	197	#if __GNUC__ >= 3
25	EV_WATCHER (ev_watcher);	198	# define expect(expr,value) __builtin_expect ((expr),(value))
26	};	199	# define inline_size static inline /* inline for codesize */
		200	# if EV_MINIMAL
		201	# define noinline __attribute__ ((noinline))
		202	# define inline_speed static noinline
		203	# else
		204	# define noinline
		205	# define inline_speed static inline
		206	# endif
		207	#else
		208	# define expect(expr,value) (expr)
		209	# define inline_speed static
		210	# define inline_size static
		211	# define noinline
		212	#endif
27		213
28	struct ev_watcher_list {	214	#define expect_false(expr) expect ((expr) != 0, 0)
29	EV_WATCHER_LIST (ev_watcher_list);	215	#define expect_true(expr) expect ((expr) != 0, 1)
30	};
31		216
32	static ev_tstamp now, diff; /* monotonic clock */	217	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		218	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		219
		220	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		221	#define EMPTY2(a,b) /* used to suppress some warnings */
		222
		223	typedef ev_watcher *W;
		224	typedef ev_watcher_list *WL;
		225	typedef ev_watcher_time *WT;
		226
		227	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		228
		229	#ifdef _WIN32
		230	# include "ev_win32.c"
		231	#endif
		232
		233	/*****************************************************************************/
		234
		235	static void (*syserr_cb)(const char *msg);
		236
		237	void
		238	ev_set_syserr_cb (void (*cb)(const char *msg))
		239	{
		240	syserr_cb = cb;
		241	}
		242
		243	static void noinline
		244	syserr (const char *msg)
		245	{
		246	if (!msg)
		247	msg = "(libev) system error";
		248
		249	if (syserr_cb)
		250	syserr_cb (msg);
		251	else
		252	{
		253	perror (msg);
		254	abort ();
		255	}
		256	}
		257
		258	static void *(*alloc)(void *ptr, size_t size) = realloc;
		259
		260	void
		261	ev_set_allocator (void *(*cb)(void *ptr, size_t size))
		262	{
		263	alloc = cb;
		264	}
		265
		266	inline_speed void *
		267	ev_realloc (void *ptr, size_t size)
		268	{
		269	ptr = alloc (ptr, size);
		270
		271	if (!ptr && size)
		272	{
		273	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", (long)size);
		274	abort ();
		275	}
		276
		277	return ptr;
		278	}
		279
		280	#define ev_malloc(size) ev_realloc (0, (size))
		281	#define ev_free(ptr) ev_realloc ((ptr), 0)
		282
		283	/*****************************************************************************/
		284
		285	typedef struct
		286	{
		287	WL head;
		288	unsigned char events;
		289	unsigned char reify;
		290	#if EV_SELECT_IS_WINSOCKET
		291	SOCKET handle;
		292	#endif
		293	} ANFD;
		294
		295	typedef struct
		296	{
		297	W w;
		298	int events;
		299	} ANPENDING;
		300
		301	#if EV_MULTIPLICITY
		302
		303	struct ev_loop
		304	{
		305	ev_tstamp ev_rt_now;
		306	#define ev_rt_now ((loop)->ev_rt_now)
		307	#define VAR(name,decl) decl;
		308	#include "ev_vars.h"
		309	#undef VAR
		310	};
		311	#include "ev_wrap.h"
		312
		313	static struct ev_loop default_loop_struct;
		314	struct ev_loop *ev_default_loop_ptr;
		315
		316	#else
		317
33	ev_tstamp ev_now;	318	ev_tstamp ev_rt_now;
34	int ev_method;	319	#define VAR(name,decl) static decl;
		320	#include "ev_vars.h"
		321	#undef VAR
35		322
36	static int have_monotonic; /* runtime */	323	static int ev_default_loop_ptr;
37		324
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	325	#endif
39	static void (*method_reify)(void);	326
40	static void (*method_poll)(ev_tstamp timeout);	327	/*****************************************************************************/
41		328
42	ev_tstamp	329	ev_tstamp
43	ev_time (void)	330	ev_time (void)
44	{	331	{
45	#if HAVE_REALTIME	332	#if EV_USE_REALTIME
46	struct timespec ts;	333	struct timespec ts;
47	clock_gettime (CLOCK_REALTIME, &ts);	334	clock_gettime (CLOCK_REALTIME, &ts);
48	return ts.tv_sec + ts.tv_nsec * 1e-9;	335	return ts.tv_sec + ts.tv_nsec * 1e-9;
49	#else	336	#else
50	struct timeval tv;	337	struct timeval tv;
51	gettimeofday (&tv, 0);	338	gettimeofday (&tv, 0);
52	return tv.tv_sec + tv.tv_usec * 1e-6;	339	return tv.tv_sec + tv.tv_usec * 1e-6;
53	#endif	340	#endif
54	}	341	}
55		342
56	static ev_tstamp	343	ev_tstamp inline_size
57	get_clock (void)	344	get_clock (void)
58	{	345	{
59	#if HAVE_MONOTONIC	346	#if EV_USE_MONOTONIC
60	if (have_monotonic)	347	if (expect_true (have_monotonic))
61	{	348	{
62	struct timespec ts;	349	struct timespec ts;
63	clock_gettime (CLOCK_MONOTONIC, &ts);	350	clock_gettime (CLOCK_MONOTONIC, &ts);
64	return ts.tv_sec + ts.tv_nsec * 1e-9;	351	return ts.tv_sec + ts.tv_nsec * 1e-9;
65	}	352	}
66	#endif	353	#endif
67		354
68	return ev_time ();	355	return ev_time ();
69	}	356	}
70		357
		358	#if EV_MULTIPLICITY
		359	ev_tstamp
		360	ev_now (EV_P)
		361	{
		362	return ev_rt_now;
		363	}
		364	#endif
		365
		366	#define array_roundsize(type,n) (((n) | 4) & ~3)
		367
71	#define array_needsize(base,cur,cnt,init) \	368	#define array_needsize(type,base,cur,cnt,init) \
72	if ((cnt) > cur) \	369	if (expect_false ((cnt) > cur)) \
73	{ \	370	{ \
74	int newcnt = cur ? cur << 1 : 16; \	371	int newcnt = cur; \
75	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	372	do \
		373	{ \
		374	newcnt = array_roundsize (type, newcnt << 1); \
		375	} \
		376	while ((cnt) > newcnt); \
		377	\
76	base = realloc (base, sizeof (*base) * (newcnt)); \	378	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
77	init (base + cur, newcnt - cur); \	379	init (base + cur, newcnt - cur); \
78	cur = newcnt; \	380	cur = newcnt; \
		381	}
		382
		383	#define array_slim(type,stem) \
		384	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		385	{ \
		386	stem ## max = array_roundsize (stem ## cnt >> 1); \
		387	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		388	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		389	}
		390
		391	#define array_free(stem, idx) \
		392	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		393
		394	/*****************************************************************************/
		395
		396	void noinline
		397	ev_feed_event (EV_P_ void *w, int revents)
		398	{
		399	W w_ = (W)w;
		400
		401	if (expect_false (w_->pending))
		402	{
		403	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		404	return;
		405	}
		406
		407	w_->pending = ++pendingcnt [ABSPRI (w_)];
		408	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		409	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		410	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		411	}
		412
		413	void inline_size
		414	queue_events (EV_P_ W *events, int eventcnt, int type)
		415	{
		416	int i;
		417
		418	for (i = 0; i < eventcnt; ++i)
		419	ev_feed_event (EV_A_ events [i], type);
		420	}
		421
		422	/*****************************************************************************/
		423
		424	void inline_size
		425	anfds_init (ANFD *base, int count)
		426	{
		427	while (count--)
		428	{
		429	base->head = 0;
		430	base->events = EV_NONE;
		431	base->reify = 0;
		432
		433	++base;
		434	}
		435	}
		436
		437	void inline_speed
		438	fd_event (EV_P_ int fd, int revents)
		439	{
		440	ANFD *anfd = anfds + fd;
		441	ev_io *w;
		442
		443	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		444	{
		445	int ev = w->events & revents;
		446
		447	if (ev)
		448	ev_feed_event (EV_A_ (W)w, ev);
		449	}
		450	}
		451
		452	void
		453	ev_feed_fd_event (EV_P_ int fd, int revents)
		454	{
		455	fd_event (EV_A_ fd, revents);
		456	}
		457
		458	void inline_size
		459	fd_reify (EV_P)
		460	{
		461	int i;
		462
		463	for (i = 0; i < fdchangecnt; ++i)
		464	{
		465	int fd = fdchanges [i];
		466	ANFD *anfd = anfds + fd;
		467	ev_io *w;
		468
		469	int events = 0;
		470
		471	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		472	events |= w->events;
		473
		474	#if EV_SELECT_IS_WINSOCKET
		475	if (events)
		476	{
		477	unsigned long argp;
		478	anfd->handle = _get_osfhandle (fd);
		479	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		480	}
		481	#endif
		482
		483	anfd->reify = 0;
		484
		485	backend_modify (EV_A_ fd, anfd->events, events);
		486	anfd->events = events;
		487	}
		488
		489	fdchangecnt = 0;
		490	}
		491
		492	void inline_size
		493	fd_change (EV_P_ int fd)
		494	{
		495	if (expect_false (anfds [fd].reify))
		496	return;
		497
		498	anfds [fd].reify = 1;
		499
		500	++fdchangecnt;
		501	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		502	fdchanges [fdchangecnt - 1] = fd;
		503	}
		504
		505	void inline_speed
		506	fd_kill (EV_P_ int fd)
		507	{
		508	ev_io *w;
		509
		510	while ((w = (ev_io *)anfds [fd].head))
		511	{
		512	ev_io_stop (EV_A_ w);
		513	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		514	}
		515	}
		516
		517	int inline_size
		518	fd_valid (int fd)
		519	{
		520	#ifdef _WIN32
		521	return _get_osfhandle (fd) != -1;
		522	#else
		523	return fcntl (fd, F_GETFD) != -1;
		524	#endif
		525	}
		526
		527	/* called on EBADF to verify fds */
		528	static void noinline
		529	fd_ebadf (EV_P)
		530	{
		531	int fd;
		532
		533	for (fd = 0; fd < anfdmax; ++fd)
		534	if (anfds [fd].events)
		535	if (!fd_valid (fd) == -1 && errno == EBADF)
		536	fd_kill (EV_A_ fd);
		537	}
		538
		539	/* called on ENOMEM in select/poll to kill some fds and retry */
		540	static void noinline
		541	fd_enomem (EV_P)
		542	{
		543	int fd;
		544
		545	for (fd = anfdmax; fd--; )
		546	if (anfds [fd].events)
		547	{
		548	fd_kill (EV_A_ fd);
		549	return;
79	}	550	}
		551	}
		552
		553	/* usually called after fork if backend needs to re-arm all fds from scratch */
		554	static void noinline
		555	fd_rearm_all (EV_P)
		556	{
		557	int fd;
		558
		559	/* this should be highly optimised to not do anything but set a flag */
		560	for (fd = 0; fd < anfdmax; ++fd)
		561	if (anfds [fd].events)
		562	{
		563	anfds [fd].events = 0;
		564	fd_change (EV_A_ fd);
		565	}
		566	}
		567
		568	/*****************************************************************************/
		569
		570	void inline_speed
		571	upheap (WT *heap, int k)
		572	{
		573	WT w = heap [k];
		574
		575	while (k && heap [k >> 1]->at > w->at)
		576	{
		577	heap [k] = heap [k >> 1];
		578	((W)heap [k])->active = k + 1;
		579	k >>= 1;
		580	}
		581
		582	heap [k] = w;
		583	((W)heap [k])->active = k + 1;
		584
		585	}
		586
		587	void inline_speed
		588	downheap (WT *heap, int N, int k)
		589	{
		590	WT w = heap [k];
		591
		592	while (k < (N >> 1))
		593	{
		594	int j = k << 1;
		595
		596	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		597	++j;
		598
		599	if (w->at <= heap [j]->at)
		600	break;
		601
		602	heap [k] = heap [j];
		603	((W)heap [k])->active = k + 1;
		604	k = j;
		605	}
		606
		607	heap [k] = w;
		608	((W)heap [k])->active = k + 1;
		609	}
		610
		611	void inline_size
		612	adjustheap (WT *heap, int N, int k)
		613	{
		614	upheap (heap, k);
		615	downheap (heap, N, k);
		616	}
		617
		618	/*****************************************************************************/
80		619
81	typedef struct	620	typedef struct
82	{	621	{
83	struct ev_io *head;	622	WL head;
84	unsigned char wev, rev; /* want, received event set */	623	sig_atomic_t volatile gotsig;
85	} ANFD;	624	} ANSIG;
86		625
87	static ANFD *anfds;	626	static ANSIG *signals;
88	static int anfdmax;	627	static int signalmax;
89		628
90	static int *fdchanges;	629	static int sigpipe [2];
91	static int fdchangemax, fdchangecnt;	630	static sig_atomic_t volatile gotsig;
		631	static ev_io sigev;
		632
		633	void inline_size
		634	signals_init (ANSIG *base, int count)
		635	{
		636	while (count--)
		637	{
		638	base->head = 0;
		639	base->gotsig = 0;
		640
		641	++base;
		642	}
		643	}
92		644
93	static void	645	static void
94	anfds_init (ANFD *base, int count)	646	sighandler (int signum)
95	{	647	{
96	while (count--)	648	#if _WIN32
97	{	649	signal (signum, sighandler);
98	base->head = 0;	650	#endif
99	base->wev = base->rev = EV_NONE;	651
100	++base;	652	signals [signum - 1].gotsig = 1;
		653
		654	if (!gotsig)
101	}	655	{
		656	int old_errno = errno;
		657	gotsig = 1;
		658	write (sigpipe [1], &signum, 1);
		659	errno = old_errno;
		660	}
102	}	661	}
103		662
104	typedef struct	663	void noinline
		664	ev_feed_signal_event (EV_P_ int signum)
105	{	665	{
106	struct ev_watcher *w;	666	WL w;
107	int events;
108	} ANPENDING;
109		667
110	static ANPENDING *pendings;	668	#if EV_MULTIPLICITY
111	static int pendingmax, pendingcnt;	669	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		670	#endif
		671
		672	--signum;
		673
		674	if (signum < 0 || signum >= signalmax)
		675	return;
		676
		677	signals [signum].gotsig = 0;
		678
		679	for (w = signals [signum].head; w; w = w->next)
		680	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		681	}
112		682
113	static void	683	static void
114	event (struct ev_watcher *w, int events)	684	sigcb (EV_P_ ev_io *iow, int revents)
115	{	685	{
116	w->pending = ++pendingcnt;	686	int signum;
117	array_needsize (pendings, pendingmax, pendingcnt, );	687
118	pendings [pendingcnt - 1].w = w;	688	read (sigpipe [0], &revents, 1);
119	pendings [pendingcnt - 1].events = events;	689	gotsig = 0;
		690
		691	for (signum = signalmax; signum--; )
		692	if (signals [signum].gotsig)
		693	ev_feed_signal_event (EV_A_ signum + 1);
120	}	694	}
		695
		696	void inline_size
		697	fd_intern (int fd)
		698	{
		699	#ifdef _WIN32
		700	int arg = 1;
		701	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		702	#else
		703	fcntl (fd, F_SETFD, FD_CLOEXEC);
		704	fcntl (fd, F_SETFL, O_NONBLOCK);
		705	#endif
		706	}
		707
		708	static void noinline
		709	siginit (EV_P)
		710	{
		711	fd_intern (sigpipe [0]);
		712	fd_intern (sigpipe [1]);
		713
		714	ev_io_set (&sigev, sigpipe [0], EV_READ);
		715	ev_io_start (EV_A_ &sigev);
		716	ev_unref (EV_A); /* child watcher should not keep loop alive */
		717	}
		718
		719	/*****************************************************************************/
		720
		721	static ev_child *childs [EV_PID_HASHSIZE];
		722
		723	#ifndef _WIN32
		724
		725	static ev_signal childev;
		726
		727	void inline_speed
		728	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		729	{
		730	ev_child *w;
		731
		732	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		733	if (w->pid == pid || !w->pid)
		734	{
		735	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		736	w->rpid = pid;
		737	w->rstatus = status;
		738	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		739	}
		740	}
		741
		742	#ifndef WCONTINUED
		743	# define WCONTINUED 0
		744	#endif
121		745
122	static void	746	static void
123	fd_event (int fd, int events)	747	childcb (EV_P_ ev_signal *sw, int revents)
124	{	748	{
125	ANFD *anfd = anfds + fd;	749	int pid, status;
126	struct ev_io *w;
127		750
128	for (w = anfd->head; w; w = w->next)	751	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
129	{	752	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
130	int ev = w->events & events;	753	if (!WCONTINUED
		754	|| errno != EINVAL
		755	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		756	return;
131		757
132	if (ev)	758	/* make sure we are called again until all childs have been reaped */
133	event ((struct ev_watcher *)w, ev);	759	/* we need to do it this way so that the callback gets called before we continue */
134	}	760	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
135	}
136		761
137	static struct ev_timer **atimers;	762	child_reap (EV_A_ sw, pid, pid, status);
138	static int atimermax, atimercnt;	763	if (EV_PID_HASHSIZE > 1)
		764	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		765	}
139		766
140	static struct ev_timer **rtimers;	767	#endif
141	static int rtimermax, rtimercnt;	768
		769	/*****************************************************************************/
		770
		771	#if EV_USE_PORT
		772	# include "ev_port.c"
		773	#endif
		774	#if EV_USE_KQUEUE
		775	# include "ev_kqueue.c"
		776	#endif
		777	#if EV_USE_EPOLL
		778	# include "ev_epoll.c"
		779	#endif
		780	#if EV_USE_POLL
		781	# include "ev_poll.c"
		782	#endif
		783	#if EV_USE_SELECT
		784	# include "ev_select.c"
		785	#endif
		786
		787	int
		788	ev_version_major (void)
		789	{
		790	return EV_VERSION_MAJOR;
		791	}
		792
		793	int
		794	ev_version_minor (void)
		795	{
		796	return EV_VERSION_MINOR;
		797	}
		798
		799	/* return true if we are running with elevated privileges and should ignore env variables */
		800	int inline_size
		801	enable_secure (void)
		802	{
		803	#ifdef _WIN32
		804	return 0;
		805	#else
		806	return getuid () != geteuid ()
		807	|| getgid () != getegid ();
		808	#endif
		809	}
		810
		811	unsigned int
		812	ev_supported_backends (void)
		813	{
		814	unsigned int flags = 0;
		815
		816	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		817	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		818	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		819	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		820	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		821
		822	return flags;
		823	}
		824
		825	unsigned int
		826	ev_recommended_backends (void)
		827	{
		828	unsigned int flags = ev_supported_backends ();
		829
		830	#ifndef __NetBSD__
		831	/* kqueue is borked on everything but netbsd apparently */
		832	/* it usually doesn't work correctly on anything but sockets and pipes */
		833	flags &= ~EVBACKEND_KQUEUE;
		834	#endif
		835	#ifdef __APPLE__
		836	// flags &= ~EVBACKEND_KQUEUE; for documentation
		837	flags &= ~EVBACKEND_POLL;
		838	#endif
		839
		840	return flags;
		841	}
		842
		843	unsigned int
		844	ev_embeddable_backends (void)
		845	{
		846	return EVBACKEND_EPOLL
		847	| EVBACKEND_KQUEUE
		848	| EVBACKEND_PORT;
		849	}
		850
		851	unsigned int
		852	ev_backend (EV_P)
		853	{
		854	return backend;
		855	}
142		856
143	static void	857	static void
144	upheap (struct ev_timer **timers, int k)	858	loop_init (EV_P_ unsigned int flags)
145	{	859	{
146	struct ev_timer *w = timers [k];	860	if (!backend)
147		861	{
148	while (k && timers [k >> 1]->at > w->at)	862	#if EV_USE_MONOTONIC
149	{	863	{
150	timers [k] = timers [k >> 1];	864	struct timespec ts;
151	timers [k]->active = k + 1;	865	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
152	k >>= 1;	866	have_monotonic = 1;
153	}	867	}
		868	#endif
154		869
155	timers [k] = w;	870	ev_rt_now = ev_time ();
156	timers [k]->active = k + 1;	871	mn_now = get_clock ();
		872	now_floor = mn_now;
		873	rtmn_diff = ev_rt_now - mn_now;
157		874
		875	if (!(flags & EVFLAG_NOENV)
		876	&& !enable_secure ()
		877	&& getenv ("LIBEV_FLAGS"))
		878	flags = atoi (getenv ("LIBEV_FLAGS"));
		879
		880	if (!(flags & 0x0000ffffUL))
		881	flags |= ev_recommended_backends ();
		882
		883	backend = 0;
		884	#if EV_USE_PORT
		885	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		886	#endif
		887	#if EV_USE_KQUEUE
		888	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		889	#endif
		890	#if EV_USE_EPOLL
		891	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		892	#endif
		893	#if EV_USE_POLL
		894	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		895	#endif
		896	#if EV_USE_SELECT
		897	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		898	#endif
		899
		900	ev_init (&sigev, sigcb);
		901	ev_set_priority (&sigev, EV_MAXPRI);
		902	}
158	}	903	}
159		904
160	static void	905	static void
161	downheap (struct ev_timer **timers, int N, int k)	906	loop_destroy (EV_P)
162	{	907	{
163	struct ev_timer *w = timers [k];	908	int i;
164		909
165	while (k < (N >> 1))	910	#if EV_USE_PORT
166	{	911	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
167	int j = k << 1;	912	#endif
		913	#if EV_USE_KQUEUE
		914	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		915	#endif
		916	#if EV_USE_EPOLL
		917	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		918	#endif
		919	#if EV_USE_POLL
		920	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		921	#endif
		922	#if EV_USE_SELECT
		923	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		924	#endif
168		925
169	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	926	for (i = NUMPRI; i--; )
170	++j;	927	array_free (pending, [i]);
171		928
172	if (w->at <= timers [j]->at)	929	/* have to use the microsoft-never-gets-it-right macro */
173	break;	930	array_free (fdchange, EMPTY0);
		931	array_free (timer, EMPTY0);
		932	#if EV_PERIODIC_ENABLE
		933	array_free (periodic, EMPTY0);
		934	#endif
		935	array_free (idle, EMPTY0);
		936	array_free (prepare, EMPTY0);
		937	array_free (check, EMPTY0);
174		938
175	timers [k] = timers [j];	939	backend = 0;
176	timers [k]->active = k + 1;
177	k = j;
178	}
179
180	timers [k] = w;
181	timers [k]->active = k + 1;
182	}	940	}
183
184	static struct ev_signal **signals;
185	static int signalmax;
186		941
187	static void	942	static void
188	signals_init (struct ev_signal **base, int count)	943	loop_fork (EV_P)
189	{	944	{
190	while (count--)	945	#if EV_USE_PORT
191	*base++ = 0;	946	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
192	}	947	#endif
193		948	#if EV_USE_KQUEUE
		949	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		950	#endif
194	#if HAVE_EPOLL	951	#if EV_USE_EPOLL
195	# include "ev_epoll.c"	952	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
196	#endif	953	#endif
197	#if HAVE_SELECT
198	# include "ev_select.c"
199	#endif
200		954
201	int ev_init (int flags)	955	if (ev_is_active (&sigev))
202	{
203	#if HAVE_MONOTONIC
204	{	956	{
205	struct timespec ts;	957	/* default loop */
206	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
207	have_monotonic = 1;
208	}
209	#endif
210		958
211	ev_now = ev_time ();	959	ev_ref (EV_A);
212	now = get_clock ();	960	ev_io_stop (EV_A_ &sigev);
213	diff = ev_now - now;	961	close (sigpipe [0]);
		962	close (sigpipe [1]);
214		963
215	#if HAVE_EPOLL	964	while (pipe (sigpipe))
216	if (epoll_init (flags))	965	syserr ("(libev) error creating pipe");
217	return ev_method;
218	#endif
219	#if HAVE_SELECT
220	if (select_init (flags))
221	return ev_method;
222	#endif
223		966
224	ev_method = EVMETHOD_NONE;	967	siginit (EV_A);
225	return ev_method;
226	}
227
228	void ev_prefork (void)
229	{
230	}
231
232	void ev_postfork_parent (void)
233	{
234	}
235
236	void ev_postfork_child (void)
237	{
238	#if HAVE_EPOLL
239	epoll_postfork_child ();
240	#endif
241	}
242
243	static void
244	call_pending ()
245	{
246	int i;
247
248	for (i = 0; i < pendingcnt; ++i)
249	{	968	}
250	ANPENDING *p = pendings + i;
251		969
252	if (p->w)	970	postfork = 0;
		971	}
		972
		973	#if EV_MULTIPLICITY
		974	struct ev_loop *
		975	ev_loop_new (unsigned int flags)
		976	{
		977	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		978
		979	memset (loop, 0, sizeof (struct ev_loop));
		980
		981	loop_init (EV_A_ flags);
		982
		983	if (ev_backend (EV_A))
		984	return loop;
		985
		986	return 0;
		987	}
		988
		989	void
		990	ev_loop_destroy (EV_P)
		991	{
		992	loop_destroy (EV_A);
		993	ev_free (loop);
		994	}
		995
		996	void
		997	ev_loop_fork (EV_P)
		998	{
		999	postfork = 1;
		1000	}
		1001
		1002	#endif
		1003
		1004	#if EV_MULTIPLICITY
		1005	struct ev_loop *
		1006	ev_default_loop_init (unsigned int flags)
		1007	#else
		1008	int
		1009	ev_default_loop (unsigned int flags)
		1010	#endif
		1011	{
		1012	if (sigpipe [0] == sigpipe [1])
		1013	if (pipe (sigpipe))
		1014	return 0;
		1015
		1016	if (!ev_default_loop_ptr)
		1017	{
		1018	#if EV_MULTIPLICITY
		1019	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1020	#else
		1021	ev_default_loop_ptr = 1;
		1022	#endif
		1023
		1024	loop_init (EV_A_ flags);
		1025
		1026	if (ev_backend (EV_A))
253	{	1027	{
254	p->w->pending = 0;	1028	siginit (EV_A);
255	p->w->cb (p->w, p->events);	1029
		1030	#ifndef _WIN32
		1031	ev_signal_init (&childev, childcb, SIGCHLD);
		1032	ev_set_priority (&childev, EV_MAXPRI);
		1033	ev_signal_start (EV_A_ &childev);
		1034	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1035	#endif
256	}	1036	}
		1037	else
		1038	ev_default_loop_ptr = 0;
		1039	}
		1040
		1041	return ev_default_loop_ptr;
		1042	}
		1043
		1044	void
		1045	ev_default_destroy (void)
		1046	{
		1047	#if EV_MULTIPLICITY
		1048	struct ev_loop *loop = ev_default_loop_ptr;
		1049	#endif
		1050
		1051	#ifndef _WIN32
		1052	ev_ref (EV_A); /* child watcher */
		1053	ev_signal_stop (EV_A_ &childev);
		1054	#endif
		1055
		1056	ev_ref (EV_A); /* signal watcher */
		1057	ev_io_stop (EV_A_ &sigev);
		1058
		1059	close (sigpipe [0]); sigpipe [0] = 0;
		1060	close (sigpipe [1]); sigpipe [1] = 0;
		1061
		1062	loop_destroy (EV_A);
		1063	}
		1064
		1065	void
		1066	ev_default_fork (void)
		1067	{
		1068	#if EV_MULTIPLICITY
		1069	struct ev_loop *loop = ev_default_loop_ptr;
		1070	#endif
		1071
		1072	if (backend)
		1073	postfork = 1;
		1074	}
		1075
		1076	/*****************************************************************************/
		1077
		1078	int inline_size
		1079	any_pending (EV_P)
		1080	{
		1081	int pri;
		1082
		1083	for (pri = NUMPRI; pri--; )
		1084	if (pendingcnt [pri])
		1085	return 1;
		1086
		1087	return 0;
		1088	}
		1089
		1090	void inline_speed
		1091	call_pending (EV_P)
		1092	{
		1093	int pri;
		1094
		1095	for (pri = NUMPRI; pri--; )
		1096	while (pendingcnt [pri])
		1097	{
		1098	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1099
		1100	if (expect_true (p->w))
		1101	{
		1102	assert (("non-pending watcher on pending list", p->w->pending));
		1103
		1104	p->w->pending = 0;
		1105	EV_CB_INVOKE (p->w, p->events);
		1106	}
257	}	1107	}
258
259	pendingcnt = 0;
260	}	1108	}
261		1109
262	static void	1110	void inline_size
263	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1111	timers_reify (EV_P)
264	{	1112	{
265	while (timercnt && timers [0]->at <= now)	1113	while (timercnt && ((WT)timers [0])->at <= mn_now)
266	{	1114	{
267	struct ev_timer *w = timers [0];	1115	ev_timer *w = timers [0];
		1116
		1117	assert (("inactive timer on timer heap detected", ev_is_active (w)));
268		1118
269	/* first reschedule or stop timer */	1119	/* first reschedule or stop timer */
270	if (w->repeat)	1120	if (w->repeat)
271	{	1121	{
272	if (w->is_abs)	1122	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
273	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1123
274	else
275	w->at = now + w->repeat;	1124	((WT)w)->at += w->repeat;
		1125	if (((WT)w)->at < mn_now)
		1126	((WT)w)->at = mn_now;
276		1127
277	assert (w->at > now);
278
279	downheap (timers, timercnt, 0);	1128	downheap ((WT *)timers, timercnt, 0);
280	}	1129	}
281	else	1130	else
		1131	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1132
		1133	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1134	}
		1135	}
		1136
		1137	#if EV_PERIODIC_ENABLE
		1138	void inline_size
		1139	periodics_reify (EV_P)
		1140	{
		1141	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1142	{
		1143	ev_periodic *w = periodics [0];
		1144
		1145	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1146
		1147	/* first reschedule or stop timer */
		1148	if (w->reschedule_cb)
282	{	1149	{
283	evtimer_stop (w); /* nonrepeating: stop timer */	1150	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
284	--timercnt; /* maybe pass by reference instead? */	1151	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1152	downheap ((WT *)periodics, periodiccnt, 0);
285	}	1153	}
		1154	else if (w->interval)
		1155	{
		1156	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1157	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1158	downheap ((WT *)periodics, periodiccnt, 0);
		1159	}
		1160	else
		1161	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
286		1162
287	event ((struct ev_watcher *)w, EV_TIMEOUT);	1163	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
288	}	1164	}
289	}	1165	}
290		1166
291	static void	1167	static void noinline
292	time_update ()	1168	periodics_reschedule (EV_P)
293	{	1169	{
294	int i;	1170	int i;
		1171
		1172	/* adjust periodics after time jump */
		1173	for (i = 0; i < periodiccnt; ++i)
		1174	{
		1175	ev_periodic *w = periodics [i];
		1176
		1177	if (w->reschedule_cb)
		1178	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1179	else if (w->interval)
		1180	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1181	}
		1182
		1183	/* now rebuild the heap */
		1184	for (i = periodiccnt >> 1; i--; )
		1185	downheap ((WT *)periodics, periodiccnt, i);
		1186	}
		1187	#endif
		1188
		1189	int inline_size
		1190	time_update_monotonic (EV_P)
		1191	{
		1192	mn_now = get_clock ();
		1193
		1194	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1195	{
		1196	ev_rt_now = rtmn_diff + mn_now;
		1197	return 0;
		1198	}
		1199	else
		1200	{
		1201	now_floor = mn_now;
295	ev_now = ev_time ();	1202	ev_rt_now = ev_time ();
296		1203	return 1;
297	if (have_monotonic)
298	{	1204	}
299	ev_tstamp odiff = diff;	1205	}
300		1206
301	/* detecting time jumps is much more difficult */	1207	void inline_size
302	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1208	time_update (EV_P)
		1209	{
		1210	int i;
		1211
		1212	#if EV_USE_MONOTONIC
		1213	if (expect_true (have_monotonic))
		1214	{
		1215	if (time_update_monotonic (EV_A))
303	{	1216	{
304	now = get_clock ();	1217	ev_tstamp odiff = rtmn_diff;
		1218
		1219	/* loop a few times, before making important decisions.
		1220	* on the choice of "4": one iteration isn't enough,
		1221	* in case we get preempted during the calls to
		1222	* ev_time and get_clock. a second call is almost guarenteed
		1223	* to succeed in that case, though. and looping a few more times
		1224	* doesn't hurt either as we only do this on time-jumps or
		1225	* in the unlikely event of getting preempted here.
		1226	*/
		1227	for (i = 4; --i; )
		1228	{
305	diff = ev_now - now;	1229	rtmn_diff = ev_rt_now - mn_now;
306		1230
307	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1231	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
308	return; /* all is well */	1232	return; /* all is well */
309		1233
310	ev_now = ev_time ();	1234	ev_rt_now = ev_time ();
		1235	mn_now = get_clock ();
		1236	now_floor = mn_now;
		1237	}
		1238
		1239	# if EV_PERIODIC_ENABLE
		1240	periodics_reschedule (EV_A);
		1241	# endif
		1242	/* no timer adjustment, as the monotonic clock doesn't jump */
		1243	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
311	}	1244	}
		1245	}
		1246	else
		1247	#endif
		1248	{
		1249	ev_rt_now = ev_time ();
312		1250
313	/* time jump detected, reschedule atimers */	1251	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
314	for (i = 0; i < atimercnt; ++i)
315	{	1252	{
316	struct ev_timer *w = atimers [i];	1253	#if EV_PERIODIC_ENABLE
317	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1254	periodics_reschedule (EV_A);
		1255	#endif
		1256
		1257	/* adjust timers. this is easy, as the offset is the same for all */
		1258	for (i = 0; i < timercnt; ++i)
		1259	((WT)timers [i])->at += ev_rt_now - mn_now;
318	}	1260	}
319	}
320	else
321	{
322	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
323	/* time jump detected, adjust rtimers */
324	for (i = 0; i < rtimercnt; ++i)
325	rtimers [i]->at += ev_now - now;
326		1261
327	now = ev_now;	1262	mn_now = ev_rt_now;
328	}
329	}
330
331	int ev_loop_done;
332
333	void ev_loop (int flags)
334	{
335	double block;
336	ev_loop_done = flags & EVLOOP_ONESHOT;
337
338	do
339	{	1263	}
		1264	}
		1265
		1266	void
		1267	ev_ref (EV_P)
		1268	{
		1269	++activecnt;
		1270	}
		1271
		1272	void
		1273	ev_unref (EV_P)
		1274	{
		1275	--activecnt;
		1276	}
		1277
		1278	static int loop_done;
		1279
		1280	void
		1281	ev_loop (EV_P_ int flags)
		1282	{
		1283	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1284	? EVUNLOOP_ONE
		1285	: EVUNLOOP_CANCEL;
		1286
		1287	while (activecnt)
		1288	{
		1289	/* we might have forked, so reify kernel state if necessary */
		1290	#if EV_FORK_ENABLE
		1291	if (expect_false (postfork))
		1292	if (forkcnt)
		1293	{
		1294	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1295	call_pending (EV_A);
		1296	}
		1297	#endif
		1298
		1299	/* queue check watchers (and execute them) */
		1300	if (expect_false (preparecnt))
		1301	{
		1302	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1303	call_pending (EV_A);
		1304	}
		1305
		1306	/* we might have forked, so reify kernel state if necessary */
		1307	if (expect_false (postfork))
		1308	loop_fork (EV_A);
		1309
340	/* update fd-related kernel structures */	1310	/* update fd-related kernel structures */
341	method_reify (); fdchangecnt = 0;	1311	fd_reify (EV_A);
342		1312
343	/* calculate blocking time */	1313	/* calculate blocking time */
		1314	{
		1315	double block;
		1316
344	if (flags & EVLOOP_NONBLOCK)	1317	if (flags & EVLOOP_NONBLOCK || idlecnt)
345	block = 0.;	1318	block = 0.; /* do not block at all */
346	else	1319	else
347	{	1320	{
		1321	/* update time to cancel out callback processing overhead */
		1322	#if EV_USE_MONOTONIC
		1323	if (expect_true (have_monotonic))
		1324	time_update_monotonic (EV_A);
		1325	else
		1326	#endif
		1327	{
		1328	ev_rt_now = ev_time ();
		1329	mn_now = ev_rt_now;
		1330	}
		1331
348	block = MAX_BLOCKTIME;	1332	block = MAX_BLOCKTIME;
349		1333
350	if (rtimercnt)	1334	if (timercnt)
351	{	1335	{
352	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1336	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
353	if (block > to) block = to;	1337	if (block > to) block = to;
354	}	1338	}
355		1339
		1340	#if EV_PERIODIC_ENABLE
356	if (atimercnt)	1341	if (periodiccnt)
357	{	1342	{
358	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1343	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
359	if (block > to) block = to;	1344	if (block > to) block = to;
360	}	1345	}
		1346	#endif
361		1347
362	if (block < 0.) block = 0.;	1348	if (expect_false (block < 0.)) block = 0.;
363	}	1349	}
364		1350
365	method_poll (block);	1351	backend_poll (EV_A_ block);
		1352	}
366		1353
367	/* update ev_now, do magic */	1354	/* update ev_rt_now, do magic */
368	time_update ();	1355	time_update (EV_A);
369		1356
370	/* put pending timers into pendign queue and reschedule them */	1357	/* queue pending timers and reschedule them */
371	/* absolute timers first */	1358	timers_reify (EV_A); /* relative timers called last */
372	timers_reify (atimers, atimercnt, ev_now);	1359	#if EV_PERIODIC_ENABLE
373	/* relative timers second */	1360	periodics_reify (EV_A); /* absolute timers called first */
374	timers_reify (rtimers, rtimercnt, now);	1361	#endif
375		1362
		1363	/* queue idle watchers unless other events are pending */
		1364	if (idlecnt && !any_pending (EV_A))
		1365	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1366
		1367	/* queue check watchers, to be executed first */
		1368	if (expect_false (checkcnt))
		1369	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1370
376	call_pending ();	1371	call_pending (EV_A);
377	}
378	while (!ev_loop_done);
379	}
380		1372
381	static void	1373	if (expect_false (loop_done))
382	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1374	break;
		1375	}
		1376
		1377	if (loop_done == EVUNLOOP_ONE)
		1378	loop_done = EVUNLOOP_CANCEL;
		1379	}
		1380
		1381	void
		1382	ev_unloop (EV_P_ int how)
		1383	{
		1384	loop_done = how;
		1385	}
		1386
		1387	/*****************************************************************************/
		1388
		1389	void inline_size
		1390	wlist_add (WL *head, WL elem)
383	{	1391	{
384	elem->next = *head;	1392	elem->next = *head;
385	*head = elem;	1393	*head = elem;
386	}	1394	}
387		1395
388	static void	1396	void inline_size
389	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1397	wlist_del (WL *head, WL elem)
390	{	1398	{
391	while (*head)	1399	while (*head)
392	{	1400	{
393	if (*head == elem)	1401	if (*head == elem)
394	{	1402	{
…		…
398		1406
399	head = &(*head)->next;	1407	head = &(*head)->next;
400	}	1408	}
401	}	1409	}
402		1410
		1411	void inline_speed
		1412	ev_clear_pending (EV_P_ W w)
		1413	{
		1414	if (w->pending)
		1415	{
		1416	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1417	w->pending = 0;
		1418	}
		1419	}
		1420
		1421	void inline_speed
		1422	ev_start (EV_P_ W w, int active)
		1423	{
		1424	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1425	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1426
		1427	w->active = active;
		1428	ev_ref (EV_A);
		1429	}
		1430
		1431	void inline_size
		1432	ev_stop (EV_P_ W w)
		1433	{
		1434	ev_unref (EV_A);
		1435	w->active = 0;
		1436	}
		1437
		1438	/*****************************************************************************/
		1439
		1440	void
		1441	ev_io_start (EV_P_ ev_io *w)
		1442	{
		1443	int fd = w->fd;
		1444
		1445	if (expect_false (ev_is_active (w)))
		1446	return;
		1447
		1448	assert (("ev_io_start called with negative fd", fd >= 0));
		1449
		1450	ev_start (EV_A_ (W)w, 1);
		1451	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1452	wlist_add ((WL *)&anfds[fd].head, (WL)w);
		1453
		1454	fd_change (EV_A_ fd);
		1455	}
		1456
		1457	void
		1458	ev_io_stop (EV_P_ ev_io *w)
		1459	{
		1460	ev_clear_pending (EV_A_ (W)w);
		1461	if (expect_false (!ev_is_active (w)))
		1462	return;
		1463
		1464	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1465
		1466	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
		1467	ev_stop (EV_A_ (W)w);
		1468
		1469	fd_change (EV_A_ w->fd);
		1470	}
		1471
		1472	void
		1473	ev_timer_start (EV_P_ ev_timer *w)
		1474	{
		1475	if (expect_false (ev_is_active (w)))
		1476	return;
		1477
		1478	((WT)w)->at += mn_now;
		1479
		1480	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1481
		1482	ev_start (EV_A_ (W)w, ++timercnt);
		1483	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
		1484	timers [timercnt - 1] = w;
		1485	upheap ((WT *)timers, timercnt - 1);
		1486
		1487	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1488	}
		1489
		1490	void
		1491	ev_timer_stop (EV_P_ ev_timer *w)
		1492	{
		1493	ev_clear_pending (EV_A_ (W)w);
		1494	if (expect_false (!ev_is_active (w)))
		1495	return;
		1496
		1497	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1498
		1499	if (expect_true (((W)w)->active < timercnt--))
		1500	{
		1501	timers [((W)w)->active - 1] = timers [timercnt];
		1502	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1503	}
		1504
		1505	((WT)w)->at -= mn_now;
		1506
		1507	ev_stop (EV_A_ (W)w);
		1508	}
		1509
		1510	void
		1511	ev_timer_again (EV_P_ ev_timer *w)
		1512	{
		1513	if (ev_is_active (w))
		1514	{
		1515	if (w->repeat)
		1516	{
		1517	((WT)w)->at = mn_now + w->repeat;
		1518	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1519	}
		1520	else
		1521	ev_timer_stop (EV_A_ w);
		1522	}
		1523	else if (w->repeat)
		1524	{
		1525	w->at = w->repeat;
		1526	ev_timer_start (EV_A_ w);
		1527	}
		1528	}
		1529
		1530	#if EV_PERIODIC_ENABLE
		1531	void
		1532	ev_periodic_start (EV_P_ ev_periodic *w)
		1533	{
		1534	if (expect_false (ev_is_active (w)))
		1535	return;
		1536
		1537	if (w->reschedule_cb)
		1538	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1539	else if (w->interval)
		1540	{
		1541	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1542	/* this formula differs from the one in periodic_reify because we do not always round up */
		1543	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1544	}
		1545
		1546	ev_start (EV_A_ (W)w, ++periodiccnt);
		1547	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
		1548	periodics [periodiccnt - 1] = w;
		1549	upheap ((WT *)periodics, periodiccnt - 1);
		1550
		1551	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1552	}
		1553
		1554	void
		1555	ev_periodic_stop (EV_P_ ev_periodic *w)
		1556	{
		1557	ev_clear_pending (EV_A_ (W)w);
		1558	if (expect_false (!ev_is_active (w)))
		1559	return;
		1560
		1561	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1562
		1563	if (expect_true (((W)w)->active < periodiccnt--))
		1564	{
		1565	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1566	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
		1567	}
		1568
		1569	ev_stop (EV_A_ (W)w);
		1570	}
		1571
		1572	void
		1573	ev_periodic_again (EV_P_ ev_periodic *w)
		1574	{
		1575	/* TODO: use adjustheap and recalculation */
		1576	ev_periodic_stop (EV_A_ w);
		1577	ev_periodic_start (EV_A_ w);
		1578	}
		1579	#endif
		1580
		1581	#ifndef SA_RESTART
		1582	# define SA_RESTART 0
		1583	#endif
		1584
		1585	void
		1586	ev_signal_start (EV_P_ ev_signal *w)
		1587	{
		1588	#if EV_MULTIPLICITY
		1589	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1590	#endif
		1591	if (expect_false (ev_is_active (w)))
		1592	return;
		1593
		1594	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1595
		1596	ev_start (EV_A_ (W)w, 1);
		1597	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1598	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1599
		1600	if (!((WL)w)->next)
		1601	{
		1602	#if _WIN32
		1603	signal (w->signum, sighandler);
		1604	#else
		1605	struct sigaction sa;
		1606	sa.sa_handler = sighandler;
		1607	sigfillset (&sa.sa_mask);
		1608	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1609	sigaction (w->signum, &sa, 0);
		1610	#endif
		1611	}
		1612	}
		1613
		1614	void
		1615	ev_signal_stop (EV_P_ ev_signal *w)
		1616	{
		1617	ev_clear_pending (EV_A_ (W)w);
		1618	if (expect_false (!ev_is_active (w)))
		1619	return;
		1620
		1621	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1622	ev_stop (EV_A_ (W)w);
		1623
		1624	if (!signals [w->signum - 1].head)
		1625	signal (w->signum, SIG_DFL);
		1626	}
		1627
		1628	void
		1629	ev_child_start (EV_P_ ev_child *w)
		1630	{
		1631	#if EV_MULTIPLICITY
		1632	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1633	#endif
		1634	if (expect_false (ev_is_active (w)))
		1635	return;
		1636
		1637	ev_start (EV_A_ (W)w, 1);
		1638	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1639	}
		1640
		1641	void
		1642	ev_child_stop (EV_P_ ev_child *w)
		1643	{
		1644	ev_clear_pending (EV_A_ (W)w);
		1645	if (expect_false (!ev_is_active (w)))
		1646	return;
		1647
		1648	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1649	ev_stop (EV_A_ (W)w);
		1650	}
		1651
		1652	#if EV_STAT_ENABLE
		1653
		1654	# ifdef _WIN32
		1655	# undef lstat
		1656	# define lstat(a,b) _stati64 (a,b)
		1657	# endif
		1658
		1659	#define DEF_STAT_INTERVAL 5.0074891
		1660	#define MIN_STAT_INTERVAL 0.1074891
		1661
		1662	void
		1663	ev_stat_stat (EV_P_ ev_stat *w)
		1664	{
		1665	if (lstat (w->path, &w->attr) < 0)
		1666	w->attr.st_nlink = 0;
		1667	else if (!w->attr.st_nlink)
		1668	w->attr.st_nlink = 1;
		1669	}
		1670
403	static void	1671	static void
404	ev_start (struct ev_watcher *w, int active)	1672	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
405	{	1673	{
406	w->pending = 0;	1674	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
407	w->active = active;	1675
		1676	/* we copy this here each the time so that */
		1677	/* prev has the old value when the callback gets invoked */
		1678	w->prev = w->attr;
		1679	ev_stat_stat (EV_A_ w);
		1680
		1681	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1682	ev_feed_event (EV_A_ w, EV_STAT);
		1683	}
		1684
		1685	void
		1686	ev_stat_start (EV_P_ ev_stat *w)
		1687	{
		1688	if (expect_false (ev_is_active (w)))
		1689	return;
		1690
		1691	/* since we use memcmp, we need to clear any padding data etc. */
		1692	memset (&w->prev, 0, sizeof (ev_statdata));
		1693	memset (&w->attr, 0, sizeof (ev_statdata));
		1694
		1695	ev_stat_stat (EV_A_ w);
		1696
		1697	if (w->interval < MIN_STAT_INTERVAL)
		1698	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1699
		1700	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1701	ev_set_priority (&w->timer, ev_priority (w));
		1702	ev_timer_start (EV_A_ &w->timer);
		1703
		1704	ev_start (EV_A_ (W)w, 1);
		1705	}
		1706
		1707	void
		1708	ev_stat_stop (EV_P_ ev_stat *w)
		1709	{
		1710	ev_clear_pending (EV_A_ (W)w);
		1711	if (expect_false (!ev_is_active (w)))
		1712	return;
		1713
		1714	ev_timer_stop (EV_A_ &w->timer);
		1715
		1716	ev_stop (EV_A_ (W)w);
		1717	}
		1718	#endif
		1719
		1720	void
		1721	ev_idle_start (EV_P_ ev_idle *w)
		1722	{
		1723	if (expect_false (ev_is_active (w)))
		1724	return;
		1725
		1726	ev_start (EV_A_ (W)w, ++idlecnt);
		1727	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1728	idles [idlecnt - 1] = w;
		1729	}
		1730
		1731	void
		1732	ev_idle_stop (EV_P_ ev_idle *w)
		1733	{
		1734	ev_clear_pending (EV_A_ (W)w);
		1735	if (expect_false (!ev_is_active (w)))
		1736	return;
		1737
		1738	{
		1739	int active = ((W)w)->active;
		1740	idles [active - 1] = idles [--idlecnt];
		1741	((W)idles [active - 1])->active = active;
		1742	}
		1743
		1744	ev_stop (EV_A_ (W)w);
		1745	}
		1746
		1747	void
		1748	ev_prepare_start (EV_P_ ev_prepare *w)
		1749	{
		1750	if (expect_false (ev_is_active (w)))
		1751	return;
		1752
		1753	ev_start (EV_A_ (W)w, ++preparecnt);
		1754	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1755	prepares [preparecnt - 1] = w;
		1756	}
		1757
		1758	void
		1759	ev_prepare_stop (EV_P_ ev_prepare *w)
		1760	{
		1761	ev_clear_pending (EV_A_ (W)w);
		1762	if (expect_false (!ev_is_active (w)))
		1763	return;
		1764
		1765	{
		1766	int active = ((W)w)->active;
		1767	prepares [active - 1] = prepares [--preparecnt];
		1768	((W)prepares [active - 1])->active = active;
		1769	}
		1770
		1771	ev_stop (EV_A_ (W)w);
		1772	}
		1773
		1774	void
		1775	ev_check_start (EV_P_ ev_check *w)
		1776	{
		1777	if (expect_false (ev_is_active (w)))
		1778	return;
		1779
		1780	ev_start (EV_A_ (W)w, ++checkcnt);
		1781	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1782	checks [checkcnt - 1] = w;
		1783	}
		1784
		1785	void
		1786	ev_check_stop (EV_P_ ev_check *w)
		1787	{
		1788	ev_clear_pending (EV_A_ (W)w);
		1789	if (expect_false (!ev_is_active (w)))
		1790	return;
		1791
		1792	{
		1793	int active = ((W)w)->active;
		1794	checks [active - 1] = checks [--checkcnt];
		1795	((W)checks [active - 1])->active = active;
		1796	}
		1797
		1798	ev_stop (EV_A_ (W)w);
		1799	}
		1800
		1801	#if EV_EMBED_ENABLE
		1802	void noinline
		1803	ev_embed_sweep (EV_P_ ev_embed *w)
		1804	{
		1805	ev_loop (w->loop, EVLOOP_NONBLOCK);
408	}	1806	}
409		1807
410	static void	1808	static void
411	ev_stop (struct ev_watcher *w)	1809	embed_cb (EV_P_ ev_io *io, int revents)
412	{	1810	{
413	if (w->pending)	1811	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
414	pendings [w->pending - 1].w = 0;
415		1812
416	w->active = 0;
417	/* nop */
418	}
419
420	void
421	evio_start (struct ev_io *w)
422	{
423	if (ev_is_active (w))	1813	if (ev_cb (w))
424	return;	1814	ev_feed_event (EV_A_ (W)w, EV_EMBED);
425
426	int fd = w->fd;
427
428	ev_start ((struct ev_watcher *)w, 1);
429	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
430	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
431
432	++fdchangecnt;
433	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
434	fdchanges [fdchangecnt - 1] = fd;
435	}
436
437	void
438	evio_stop (struct ev_io *w)
439	{
440	if (!ev_is_active (w))
441	return;
442
443	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
444	ev_stop ((struct ev_watcher *)w);
445
446	++fdchangecnt;
447	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
448	fdchanges [fdchangecnt - 1] = w->fd;
449	}
450
451	void
452	evtimer_start (struct ev_timer *w)
453	{
454	if (ev_is_active (w))
455	return;
456
457	if (w->is_abs)
458	{
459	/* this formula differs from the one in timer_reify becuse we do not round up */
460	if (w->repeat)
461	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
462
463	ev_start ((struct ev_watcher *)w, ++atimercnt);
464	array_needsize (atimers, atimermax, atimercnt, );
465	atimers [atimercnt - 1] = w;
466	upheap (atimers, atimercnt - 1);
467	}
468	else	1815	else
		1816	ev_embed_sweep (loop, w);
		1817	}
		1818
		1819	void
		1820	ev_embed_start (EV_P_ ev_embed *w)
		1821	{
		1822	if (expect_false (ev_is_active (w)))
		1823	return;
		1824
469	{	1825	{
470	w->at += now;	1826	struct ev_loop *loop = w->loop;
471		1827	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
472	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1828	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
473	array_needsize (rtimers, rtimermax, rtimercnt, );
474	rtimers [rtimercnt - 1] = w;
475	upheap (rtimers, rtimercnt - 1);
476	}	1829	}
477		1830
478	}	1831	ev_set_priority (&w->io, ev_priority (w));
		1832	ev_io_start (EV_A_ &w->io);
479		1833
		1834	ev_start (EV_A_ (W)w, 1);
		1835	}
		1836
480	void	1837	void
481	evtimer_stop (struct ev_timer *w)	1838	ev_embed_stop (EV_P_ ev_embed *w)
482	{	1839	{
		1840	ev_clear_pending (EV_A_ (W)w);
483	if (!ev_is_active (w))	1841	if (expect_false (!ev_is_active (w)))
484	return;	1842	return;
485		1843
486	if (w->is_abs)	1844	ev_io_stop (EV_A_ &w->io);
487	{
488	if (w->active < atimercnt--)
489	{
490	atimers [w->active - 1] = atimers [atimercnt];
491	downheap (atimers, atimercnt, w->active - 1);
492	}
493	}
494	else
495	{
496	if (w->active < rtimercnt--)
497	{
498	rtimers [w->active - 1] = rtimers [rtimercnt];
499	downheap (rtimers, rtimercnt, w->active - 1);
500	}
501	}
502		1845
503	ev_stop ((struct ev_watcher *)w);	1846	ev_stop (EV_A_ (W)w);
504	}	1847	}
		1848	#endif
505		1849
		1850	#if EV_FORK_ENABLE
506	void	1851	void
507	evsignal_start (struct ev_signal *w)	1852	ev_fork_start (EV_P_ ev_fork *w)
508	{	1853	{
509	if (ev_is_active (w))	1854	if (expect_false (ev_is_active (w)))
510	return;	1855	return;
511		1856
512	ev_start ((struct ev_watcher *)w, 1);	1857	ev_start (EV_A_ (W)w, ++forkcnt);
513	array_needsize (signals, signalmax, w->signum, signals_init);	1858	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
514	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1859	forks [forkcnt - 1] = w;
515	}	1860	}
516		1861
517	void	1862	void
518	evsignal_stop (struct ev_signal *w)	1863	ev_fork_stop (EV_P_ ev_fork *w)
519	{	1864	{
		1865	ev_clear_pending (EV_A_ (W)w);
520	if (!ev_is_active (w))	1866	if (expect_false (!ev_is_active (w)))
521	return;	1867	return;
522		1868
523	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1869	{
524	ev_stop ((struct ev_watcher *)w);	1870	int active = ((W)w)->active;
		1871	forks [active - 1] = forks [--forkcnt];
		1872	((W)forks [active - 1])->active = active;
		1873	}
		1874
		1875	ev_stop (EV_A_ (W)w);
525	}	1876	}
		1877	#endif
526		1878
527	/*****************************************************************************/	1879	/*****************************************************************************/
528	#if 1	1880
		1881	struct ev_once
		1882	{
		1883	ev_io io;
		1884	ev_timer to;
		1885	void (*cb)(int revents, void *arg);
		1886	void *arg;
		1887	};
529		1888
530	static void	1889	static void
531	sin_cb (struct ev_io *w, int revents)	1890	once_cb (EV_P_ struct ev_once *once, int revents)
532	{	1891	{
533	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1892	void (*cb)(int revents, void *arg) = once->cb;
		1893	void *arg = once->arg;
		1894
		1895	ev_io_stop (EV_A_ &once->io);
		1896	ev_timer_stop (EV_A_ &once->to);
		1897	ev_free (once);
		1898
		1899	cb (revents, arg);
534	}	1900	}
535		1901
536	static void	1902	static void
		1903	once_cb_io (EV_P_ ev_io *w, int revents)
		1904	{
		1905	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1906	}
		1907
		1908	static void
537	ocb (struct ev_timer *w, int revents)	1909	once_cb_to (EV_P_ ev_timer *w, int revents)
538	{	1910	{
539	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1911	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
540	evtimer_stop (w);
541	evtimer_start (w);
542	}	1912	}
543		1913
544	int main (void)	1914	void
		1915	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
545	{	1916	{
546	struct ev_io sin;	1917	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
547		1918
548	ev_init (0);	1919	if (expect_false (!once))
549
550	evw_init (&sin, sin_cb, 55);
551	evio_set (&sin, 0, EV_READ);
552	evio_start (&sin);
553
554	struct ev_timer t[10000];
555
556	#if 1
557	int i;
558	for (i = 0; i < 10000; ++i)
559	{
560	struct ev_timer *w = t + i;
561	evw_init (w, ocb, i);
562	evtimer_set_abs (w, drand48 (), 0.99775533);
563	evtimer_start (w);
564	if (drand48 () < 0.5)
565	evtimer_stop (w);
566	}	1920	{
567	#endif	1921	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
568
569	struct ev_timer t1;
570	evw_init (&t1, ocb, 0);
571	evtimer_set_abs (&t1, 5, 10);
572	evtimer_start (&t1);
573
574	ev_loop (0);
575
576	return 0;	1922	return;
577	}	1923	}
578		1924
579	#endif	1925	once->cb = cb;
		1926	once->arg = arg;
580		1927
		1928	ev_init (&once->io, once_cb_io);
		1929	if (fd >= 0)
		1930	{
		1931	ev_io_set (&once->io, fd, events);
		1932	ev_io_start (EV_A_ &once->io);
		1933	}
581		1934
		1935	ev_init (&once->to, once_cb_to);
		1936	if (timeout >= 0.)
		1937	{
		1938	ev_timer_set (&once->to, timeout, 0.);
		1939	ev_timer_start (EV_A_ &once->to);
		1940	}
		1941	}
582		1942
		1943	#ifdef __cplusplus
		1944	}
		1945	#endif
583		1946

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