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Comparing libev/ev.c (file contents):
Revision 1.2 by root, Tue Oct 30 21:42:12 2007 UTC vs.
Revision 1.65 by root, Sun Nov 4 23:29:48 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	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
		56
1	#include <math.h>	57	#include <math.h>
2	#include <stdlib.h>	58	#include <stdlib.h>
		59	#include <unistd.h>
		60	#include <fcntl.h>
		61	#include <signal.h>
		62	#include <stddef.h>
3		63
4	#include <stdio.h>	64	#include <stdio.h>
5		65
		66	#include <assert.h>
6	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
7	#include <sys/time.h>	72	#include <sys/time.h>
8	#include <time.h>	73	#include <time.h>
9		74
		75	/**/
		76
		77	#ifndef EV_USE_MONOTONIC
		78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
10	#ifdef CLOCK_MONOTONIC	111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	113	# define EV_USE_MONOTONIC 0
12	#endif	114	#endif
13		115
14	#define HAVE_EPOLL 1	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
15	#define HAVE_REALTIME 1	118	# define EV_USE_REALTIME 0
16	#define HAVE_SELECT 0	119	#endif
17		120
18	#define MAX_BLOCKTIME 60.	121	/**/
		122
		123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
19		127
20	#include "ev.h"	128	#include "ev.h"
21		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		143
22	struct ev_watcher {	144	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);	145	typedef struct ev_watcher_list *WL;
		146	typedef struct ev_watcher_time *WT;
		147
		148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		149
		150	/*****************************************************************************/
		151
		152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
24	};	171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
25		174
26	struct ev_watcher_list {	175	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		176
30	ev_tstamp ev_now;	177	# define VAR(name,decl) static decl;
31	int ev_method;	178	# include "ev_vars.h"
		179	# undef VAR
32		180
33	static int have_monotonic; /* runtime */	181	#endif
34		182
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	183	/*****************************************************************************/
36	static void (*method_reify)(void);
37	static void (*method_poll)(ev_tstamp timeout);
38		184
39	ev_tstamp	185	inline ev_tstamp
40	ev_time (void)	186	ev_time (void)
41	{	187	{
42	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
43	struct timespec ts;	189	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	192	#else
47	struct timeval tv;	193	struct timeval tv;
48	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	196	#endif
51	}	197	}
52		198
53	static ev_tstamp	199	inline ev_tstamp
54	get_clock (void)	200	get_clock (void)
55	{	201	{
56	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
57	if (have_monotonic)	203	if (expect_true (have_monotonic))
58	{	204	{
59	struct timespec ts;	205	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	208	}
63	#endif	209	#endif
64		210
65	return ev_time ();	211	return ev_time ();
66	}	212	}
67		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
		220	#define array_roundsize(base,n) ((n) | 4 & ~3)
		221
68	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
69	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
70	{ \	224	{ \
71	int newcnt = cur ? cur << 1 : 16; \	225	int newcnt = cur; \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	226	do \
		227	{ \
		228	newcnt = array_roundsize (base, newcnt << 1); \
		229	} \
		230	while ((cnt) > newcnt); \
		231	\
73	base = realloc (base, sizeof (*base) * (newcnt)); \	232	base = realloc (base, sizeof (*base) * (newcnt)); \
74	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
75	cur = newcnt; \	234	cur = newcnt; \
76	}	235	}
77		236
78	typedef struct	237	#define array_free(stem, idx) \
79	{	238	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
80	struct ev_io *head;
81	unsigned char wev, rev; /* want, received event set */
82	} ANFD;
83		239
84	static ANFD *anfds;	240	/*****************************************************************************/
85	static int anfdmax;
86
87	static int *fdchanges;
88	static int fdchangemax, fdchangecnt;
89		241
90	static void	242	static void
91	anfds_init (ANFD *base, int count)	243	anfds_init (ANFD *base, int count)
92	{	244	{
93	while (count--)	245	while (count--)
94	{	246	{
95	base->head = 0;	247	base->head = 0;
96	base->wev = base->rev = EV_NONE;	248	base->events = EV_NONE;
		249	base->reify = 0;
		250
97	++base;	251	++base;
98	}	252	}
99	}	253	}
100		254
101	typedef struct
102	{
103	struct ev_watcher *w;
104	int events;
105	} ANPENDING;
106
107	static ANPENDING *pendings;
108	static int pendingmax, pendingcnt;
109
110	static void	255	static void
111	event (struct ev_watcher *w, int events)	256	event (EV_P_ W w, int events)
112	{	257	{
		258	if (w->pending)
		259	{
		260	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		261	return;
		262	}
		263
113	w->pending = ++pendingcnt;	264	w->pending = ++pendingcnt [ABSPRI (w)];
114	array_needsize (pendings, pendingmax, pendingcnt, );	265	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
115	pendings [pendingcnt - 1].w = w;	266	pendings [ABSPRI (w)][w->pending - 1].w = w;
116	pendings [pendingcnt - 1].events = events;	267	pendings [ABSPRI (w)][w->pending - 1].events = events;
117	}	268	}
118		269
119	static void	270	static void
		271	queue_events (EV_P_ W *events, int eventcnt, int type)
		272	{
		273	int i;
		274
		275	for (i = 0; i < eventcnt; ++i)
		276	event (EV_A_ events [i], type);
		277	}
		278
		279	static void
120	fd_event (int fd, int events)	280	fd_event (EV_P_ int fd, int events)
121	{	281	{
122	ANFD *anfd = anfds + fd;	282	ANFD *anfd = anfds + fd;
123	struct ev_io *w;	283	struct ev_io *w;
124		284
125	for (w = anfd->head; w; w = w->next)	285	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
126	{	286	{
127	int ev = w->events & events;	287	int ev = w->events & events;
128		288
129	if (ev)	289	if (ev)
130	event ((struct ev_watcher *)w, ev);	290	event (EV_A_ (W)w, ev);
		291	}
		292	}
		293
		294	/*****************************************************************************/
		295
		296	static void
		297	fd_reify (EV_P)
		298	{
		299	int i;
		300
		301	for (i = 0; i < fdchangecnt; ++i)
		302	{
		303	int fd = fdchanges [i];
		304	ANFD *anfd = anfds + fd;
		305	struct ev_io *w;
		306
		307	int events = 0;
		308
		309	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		310	events |= w->events;
		311
		312	anfd->reify = 0;
		313
		314	method_modify (EV_A_ fd, anfd->events, events);
		315	anfd->events = events;
		316	}
		317
		318	fdchangecnt = 0;
		319	}
		320
		321	static void
		322	fd_change (EV_P_ int fd)
		323	{
		324	if (anfds [fd].reify || fdchangecnt < 0)
		325	return;
		326
		327	anfds [fd].reify = 1;
		328
		329	++fdchangecnt;
		330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		331	fdchanges [fdchangecnt - 1] = fd;
		332	}
		333
		334	static void
		335	fd_kill (EV_P_ int fd)
		336	{
		337	struct ev_io *w;
		338
		339	while ((w = (struct ev_io *)anfds [fd].head))
		340	{
		341	ev_io_stop (EV_A_ w);
		342	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		343	}
		344	}
		345
		346	/* called on EBADF to verify fds */
		347	static void
		348	fd_ebadf (EV_P)
		349	{
		350	int fd;
		351
		352	for (fd = 0; fd < anfdmax; ++fd)
		353	if (anfds [fd].events)
		354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		355	fd_kill (EV_A_ fd);
		356	}
		357
		358	/* called on ENOMEM in select/poll to kill some fds and retry */
		359	static void
		360	fd_enomem (EV_P)
		361	{
		362	int fd;
		363
		364	for (fd = anfdmax; fd--; )
		365	if (anfds [fd].events)
		366	{
		367	close (fd);
		368	fd_kill (EV_A_ fd);
		369	return;
131	}	370	}
132	}	371	}
133		372
134	static struct ev_timer **timers;	373	/* susually called after fork if method needs to re-arm all fds from scratch */
135	static int timermax, timercnt;
136
137	static void	374	static void
138	upheap (int k)	375	fd_rearm_all (EV_P)
139	{	376	{
140	struct ev_timer *w = timers [k];	377	int fd;
141		378
		379	/* this should be highly optimised to not do anything but set a flag */
		380	for (fd = 0; fd < anfdmax; ++fd)
		381	if (anfds [fd].events)
		382	{
		383	anfds [fd].events = 0;
		384	fd_change (EV_A_ fd);
		385	}
		386	}
		387
		388	/*****************************************************************************/
		389
		390	static void
		391	upheap (WT *heap, int k)
		392	{
		393	WT w = heap [k];
		394
142	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
143	{	396	{
144	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
145	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
146	k >>= 1;	399	k >>= 1;
147	}	400	}
148		401
149	timers [k] = w;	402	heap [k] = w;
150	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
151		404
152	}	405	}
153		406
154	static void	407	static void
155	downheap (int k)	408	downheap (WT *heap, int N, int k)
156	{	409	{
157	struct ev_timer *w = timers [k];	410	WT w = heap [k];
158		411
159	while (k < (timercnt >> 1))	412	while (k < (N >> 1))
160	{	413	{
161	int j = k << 1;	414	int j = k << 1;
162		415
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
164	++j;	417	++j;
165		418
166	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
167	break;	420	break;
168		421
169	timers [k] = timers [j];	422	heap [k] = heap [j];
170	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
171	k = j;	424	k = j;
172	}	425	}
173		426
174	timers [k] = w;	427	heap [k] = w;
175	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
176	}	429	}
177		430
178	static struct ev_signal **signals;	431	/*****************************************************************************/
		432
		433	typedef struct
		434	{
		435	struct ev_watcher_list *head;
		436	sig_atomic_t volatile gotsig;
		437	} ANSIG;
		438
		439	static ANSIG *signals;
179	static int signalmax, signalcnt;	440	static int signalmax;
180		441
		442	static int sigpipe [2];
		443	static sig_atomic_t volatile gotsig;
		444	static struct ev_io sigev;
		445
181	static void	446	static void
182	signals_init (struct ev_signal **base, int count)	447	signals_init (ANSIG *base, int count)
183	{	448	{
184	while (count--)	449	while (count--)
185	*base++ = 0;	450	{
186	}	451	base->head = 0;
		452	base->gotsig = 0;
187		453
		454	++base;
		455	}
		456	}
		457
		458	static void
		459	sighandler (int signum)
		460	{
		461	signals [signum - 1].gotsig = 1;
		462
		463	if (!gotsig)
		464	{
		465	int old_errno = errno;
		466	gotsig = 1;
		467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
		469	}
		470	}
		471
		472	static void
		473	sigcb (EV_P_ struct ev_io *iow, int revents)
		474	{
		475	struct ev_watcher_list *w;
		476	int signum;
		477
		478	read (sigpipe [0], &revents, 1);
		479	gotsig = 0;
		480
		481	for (signum = signalmax; signum--; )
		482	if (signals [signum].gotsig)
		483	{
		484	signals [signum].gotsig = 0;
		485
		486	for (w = signals [signum].head; w; w = w->next)
		487	event (EV_A_ (W)w, EV_SIGNAL);
		488	}
		489	}
		490
		491	static void
		492	siginit (EV_P)
		493	{
		494	#ifndef WIN32
		495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		497
		498	/* rather than sort out wether we really need nb, set it */
		499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
		502
		503	ev_io_set (&sigev, sigpipe [0], EV_READ);
		504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
		506	}
		507
		508	/*****************************************************************************/
		509
		510	#ifndef WIN32
		511
		512	static struct ev_child *childs [PID_HASHSIZE];
		513	static struct ev_signal childev;
		514
		515	#ifndef WCONTINUED
		516	# define WCONTINUED 0
		517	#endif
		518
		519	static void
		520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		521	{
		522	struct ev_child *w;
		523
		524	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		525	if (w->pid == pid || !w->pid)
		526	{
		527	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		528	w->rpid = pid;
		529	w->rstatus = status;
		530	event (EV_A_ (W)w, EV_CHILD);
		531	}
		532	}
		533
		534	static void
		535	childcb (EV_P_ struct ev_signal *sw, int revents)
		536	{
		537	int pid, status;
		538
		539	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		540	{
		541	/* make sure we are called again until all childs have been reaped */
		542	event (EV_A_ (W)sw, EV_SIGNAL);
		543
		544	child_reap (EV_A_ sw, pid, pid, status);
		545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
		547	}
		548
		549	#endif
		550
		551	/*****************************************************************************/
		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
188	#if HAVE_EPOLL	556	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	557	# include "ev_epoll.c"
190	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
191	#if HAVE_SELECT	562	#if EV_USE_SELECT
192	# include "ev_select.c"	563	# include "ev_select.c"
193	#endif	564	#endif
194		565
195	int ev_init (int flags)	566	int
		567	ev_version_major (void)
196	{	568	{
		569	return EV_VERSION_MAJOR;
		570	}
		571
		572	int
		573	ev_version_minor (void)
		574	{
		575	return EV_VERSION_MINOR;
		576	}
		577
		578	/* return true if we are running with elevated privileges and should ignore env variables */
		579	static int
		580	enable_secure (void)
		581	{
		582	#ifdef WIN32
		583	return 0;
		584	#else
		585	return getuid () != geteuid ()
		586	|| getgid () != getegid ();
		587	#endif
		588	}
		589
		590	int
		591	ev_method (EV_P)
		592	{
		593	return method;
		594	}
		595
		596	static void
		597	loop_init (EV_P_ int methods)
		598	{
		599	if (!method)
		600	{
197	#if HAVE_MONOTONIC	601	#if EV_USE_MONOTONIC
198	{	602	{
199	struct timespec ts;	603	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	605	have_monotonic = 1;
202	}	606	}
203	#endif	607	#endif
204		608
205	ev_now = ev_time ();	609	rt_now = ev_time ();
		610	mn_now = get_clock ();
		611	now_floor = mn_now;
		612	rtmn_diff = rt_now - mn_now;
206		613
		614	if (methods == EVMETHOD_AUTO)
		615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
		618	methods = EVMETHOD_ANY;
		619
		620	method = 0;
		621	#if EV_USE_WIN32
		622	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_KQUEUE
		625	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		626	#endif
207	#if HAVE_EPOLL	627	#if EV_USE_EPOLL
208	if (epoll_init (flags))	628	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
209	return ev_method;
210	#endif	629	#endif
		630	#if EV_USE_POLL
		631	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		632	#endif
211	#if HAVE_SELECT	633	#if EV_USE_SELECT
212	if (select_init (flags))	634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
213	return ev_method;
214	#endif	635	#endif
215		636	}
216	ev_method = EVMETHOD_NONE;
217	return ev_method;
218	}	637	}
219		638
220	void ev_prefork (void)	639	void
221	{	640	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	{	641	{
238	int i;	642	int i;
239		643
240	for (i = 0; i < pendingcnt; ++i)	644	#if EV_USE_WIN32
241	{	645	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
242	ANPENDING *p = pendings + i;	646	#endif
		647	#if EV_USE_KQUEUE
		648	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		649	#endif
		650	#if EV_USE_EPOLL
		651	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		652	#endif
		653	#if EV_USE_POLL
		654	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		655	#endif
		656	#if EV_USE_SELECT
		657	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		658	#endif
243		659
244	if (p->w)	660	for (i = NUMPRI; i--; )
		661	array_free (pending, [i]);
		662
		663	array_free (fdchange, );
		664	array_free (timer, );
		665	array_free (periodic, );
		666	array_free (idle, );
		667	array_free (prepare, );
		668	array_free (check, );
		669
		670	method = 0;
		671	/*TODO*/
		672	}
		673
		674	void
		675	loop_fork (EV_P)
		676	{
		677	/*TODO*/
		678	#if EV_USE_EPOLL
		679	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		680	#endif
		681	#if EV_USE_KQUEUE
		682	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		683	#endif
		684	}
		685
		686	#if EV_MULTIPLICITY
		687	struct ev_loop *
		688	ev_loop_new (int methods)
		689	{
		690	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		691
		692	loop_init (EV_A_ methods);
		693
		694	if (ev_method (EV_A))
		695	return loop;
		696
		697	return 0;
		698	}
		699
		700	void
		701	ev_loop_destroy (EV_P)
		702	{
		703	loop_destroy (EV_A);
		704	free (loop);
		705	}
		706
		707	void
		708	ev_loop_fork (EV_P)
		709	{
		710	loop_fork (EV_A);
		711	}
		712
		713	#endif
		714
		715	#if EV_MULTIPLICITY
		716	struct ev_loop default_loop_struct;
		717	static struct ev_loop *default_loop;
		718
		719	struct ev_loop *
		720	#else
		721	static int default_loop;
		722
		723	int
		724	#endif
		725	ev_default_loop (int methods)
		726	{
		727	if (sigpipe [0] == sigpipe [1])
		728	if (pipe (sigpipe))
		729	return 0;
		730
		731	if (!default_loop)
		732	{
		733	#if EV_MULTIPLICITY
		734	struct ev_loop *loop = default_loop = &default_loop_struct;
		735	#else
		736	default_loop = 1;
		737	#endif
		738
		739	loop_init (EV_A_ methods);
		740
		741	if (ev_method (EV_A))
245	{	742	{
246	p->w->pending = 0;	743	ev_watcher_init (&sigev, sigcb);
247	p->w->cb (p->w, p->events);	744	ev_set_priority (&sigev, EV_MAXPRI);
		745	siginit (EV_A);
		746
		747	#ifndef WIN32
		748	ev_signal_init (&childev, childcb, SIGCHLD);
		749	ev_set_priority (&childev, EV_MAXPRI);
		750	ev_signal_start (EV_A_ &childev);
		751	ev_unref (EV_A); /* child watcher should not keep loop alive */
		752	#endif
248	}	753	}
		754	else
		755	default_loop = 0;
		756	}
		757
		758	return default_loop;
		759	}
		760
		761	void
		762	ev_default_destroy (void)
		763	{
		764	#if EV_MULTIPLICITY
		765	struct ev_loop *loop = default_loop;
		766	#endif
		767
		768	ev_ref (EV_A); /* child watcher */
		769	ev_signal_stop (EV_A_ &childev);
		770
		771	ev_ref (EV_A); /* signal watcher */
		772	ev_io_stop (EV_A_ &sigev);
		773
		774	close (sigpipe [0]); sigpipe [0] = 0;
		775	close (sigpipe [1]); sigpipe [1] = 0;
		776
		777	loop_destroy (EV_A);
		778	}
		779
		780	void
		781	ev_default_fork (void)
		782	{
		783	#if EV_MULTIPLICITY
		784	struct ev_loop *loop = default_loop;
		785	#endif
		786
		787	loop_fork (EV_A);
		788
		789	ev_io_stop (EV_A_ &sigev);
		790	close (sigpipe [0]);
		791	close (sigpipe [1]);
		792	pipe (sigpipe);
		793
		794	ev_ref (EV_A); /* signal watcher */
		795	siginit (EV_A);
		796	}
		797
		798	/*****************************************************************************/
		799
		800	static void
		801	call_pending (EV_P)
		802	{
		803	int pri;
		804
		805	for (pri = NUMPRI; pri--; )
		806	while (pendingcnt [pri])
		807	{
		808	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		809
		810	if (p->w)
		811	{
		812	p->w->pending = 0;
		813
		814	((void (*)(EV_P_ W, int))p->w->cb) (EV_A_ p->w, p->events);
		815	}
249	}	816	}
250
251	pendingcnt = 0;
252	}	817	}
253		818
254	static void	819	static void
255	timer_reify (void)	820	timers_reify (EV_P)
256	{	821	{
257	while (timercnt && timers [0]->at <= ev_now)	822	while (timercnt && ((WT)timers [0])->at <= mn_now)
258	{	823	{
259	struct ev_timer *w = timers [0];	824	struct ev_timer *w = timers [0];
260		825
261	fprintf (stderr, "0 %f, %d c%d\n", w->at, w->active, timercnt);//D	826	assert (("inactive timer on timer heap detected", ev_is_active (w)));
		827
262	/* first reschedule timer */	828	/* first reschedule or stop timer */
263	if (w->repeat)	829	if (w->repeat)
264	{	830	{
265	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	831	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
266	if (w->is_abs)
267	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
268	else
269	w->at = ev_now + w->repeat;	832	((WT)w)->at = mn_now + w->repeat;
270		833	downheap ((WT *)timers, timercnt, 0);
271	fprintf (stderr, "b %f\n", w->at);//D
272
273	downheap (0);
274	}	834	}
275	else	835	else
		836	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		837
		838	event (EV_A_ (W)w, EV_TIMEOUT);
		839	}
		840	}
		841
		842	static void
		843	periodics_reify (EV_P)
		844	{
		845	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
		846	{
		847	struct ev_periodic *w = periodics [0];
		848
		849	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		850
		851	/* first reschedule or stop timer */
		852	if (w->interval)
276	{	853	{
277	fprintf (stderr, "c %f, %d c%d\n", w->at, w->active, timercnt);//D	854	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
278	evtimer_stop (w); /* nonrepeating: stop timer */	855	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
		856	downheap ((WT *)periodics, periodiccnt, 0);
279	}	857	}
		858	else
		859	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
280		860
281	event ((struct ev_watcher *)w, EV_TIMEOUT);	861	event (EV_A_ (W)w, EV_PERIODIC);
		862	}
		863	}
		864
		865	static void
		866	periodics_reschedule (EV_P)
		867	{
		868	int i;
		869
		870	/* adjust periodics after time jump */
		871	for (i = 0; i < periodiccnt; ++i)
282	}	872	{
283	}	873	struct ev_periodic *w = periodics [i];
284		874
285	int ev_loop_done;	875	if (w->interval)
		876	{
		877	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
286		878
		879	if (fabs (diff) >= 1e-4)
		880	{
		881	ev_periodic_stop (EV_A_ w);
		882	ev_periodic_start (EV_A_ w);
		883
		884	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		885	}
		886	}
		887	}
		888	}
		889
		890	inline int
		891	time_update_monotonic (EV_P)
		892	{
		893	mn_now = get_clock ();
		894
		895	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		896	{
		897	rt_now = rtmn_diff + mn_now;
		898	return 0;
		899	}
		900	else
		901	{
		902	now_floor = mn_now;
		903	rt_now = ev_time ();
		904	return 1;
		905	}
		906	}
		907
		908	static void
		909	time_update (EV_P)
		910	{
		911	int i;
		912
		913	#if EV_USE_MONOTONIC
		914	if (expect_true (have_monotonic))
		915	{
		916	if (time_update_monotonic (EV_A))
		917	{
		918	ev_tstamp odiff = rtmn_diff;
		919
		920	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		921	{
		922	rtmn_diff = rt_now - mn_now;
		923
		924	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		925	return; /* all is well */
		926
		927	rt_now = ev_time ();
		928	mn_now = get_clock ();
		929	now_floor = mn_now;
		930	}
		931
		932	periodics_reschedule (EV_A);
		933	/* no timer adjustment, as the monotonic clock doesn't jump */
		934	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		935	}
		936	}
		937	else
		938	#endif
		939	{
		940	rt_now = ev_time ();
		941
		942	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		943	{
		944	periodics_reschedule (EV_A);
		945
		946	/* adjust timers. this is easy, as the offset is the same for all */
		947	for (i = 0; i < timercnt; ++i)
		948	((WT)timers [i])->at += rt_now - mn_now;
		949	}
		950
		951	mn_now = rt_now;
		952	}
		953	}
		954
		955	void
		956	ev_ref (EV_P)
		957	{
		958	++activecnt;
		959	}
		960
		961	void
		962	ev_unref (EV_P)
		963	{
		964	--activecnt;
		965	}
		966
		967	static int loop_done;
		968
		969	void
287	int ev_loop (int flags)	970	ev_loop (EV_P_ int flags)
288	{	971	{
289	double block;	972	double block;
290	ev_loop_done = flags & EVLOOP_ONESHOT;	973	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
291		974
292	do	975	do
293	{	976	{
		977	/* queue check watchers (and execute them) */
		978	if (expect_false (preparecnt))
		979	{
		980	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		981	call_pending (EV_A);
		982	}
		983
294	/* update fd-related kernel structures */	984	/* update fd-related kernel structures */
295	method_reify (); fdchangecnt = 0;	985	fd_reify (EV_A);
296		986
297	/* calculate blocking time */	987	/* calculate blocking time */
		988
		989	/* we only need this for !monotonic clockor timers, but as we basically
		990	always have timers, we just calculate it always */
		991	#if EV_USE_MONOTONIC
		992	if (expect_true (have_monotonic))
		993	time_update_monotonic (EV_A);
		994	else
		995	#endif
		996	{
298	ev_now = ev_time ();	997	rt_now = ev_time ();
		998	mn_now = rt_now;
		999	}
299		1000
300	if (flags & EVLOOP_NONBLOCK)	1001	if (flags & EVLOOP_NONBLOCK || idlecnt)
301	block = 0.;	1002	block = 0.;
302	else if (!timercnt)
303	block = MAX_BLOCKTIME;
304	else	1003	else
305	{	1004	{
		1005	block = MAX_BLOCKTIME;
		1006
		1007	if (timercnt)
		1008	{
306	block = timers [0]->at - ev_now + method_fudge;	1009	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
		1010	if (block > to) block = to;
		1011	}
		1012
		1013	if (periodiccnt)
		1014	{
		1015	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
		1016	if (block > to) block = to;
		1017	}
		1018
307	if (block < 0.) block = 0.;	1019	if (block < 0.) block = 0.;
308	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
309	}	1020	}
310		1021
311	fprintf (stderr, "block %f\n", block);//D
312	method_poll (block);	1022	method_poll (EV_A_ block);
313		1023
		1024	/* update rt_now, do magic */
		1025	time_update (EV_A);
		1026
314	/* put pending timers into pendign queue and reschedule them */	1027	/* queue pending timers and reschedule them */
315	timer_reify ();	1028	timers_reify (EV_A); /* relative timers called last */
		1029	periodics_reify (EV_A); /* absolute timers called first */
316		1030
317	ev_now = ev_time ();	1031	/* queue idle watchers unless io or timers are pending */
		1032	if (!pendingcnt)
		1033	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1034
		1035	/* queue check watchers, to be executed first */
		1036	if (checkcnt)
		1037	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1038
318	call_pending ();	1039	call_pending (EV_A);
319	}	1040	}
320	while (!ev_loop_done);	1041	while (activecnt && !loop_done);
321	}
322		1042
323	static void	1043	if (loop_done != 2)
324	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1044	loop_done = 0;
		1045	}
		1046
		1047	void
		1048	ev_unloop (EV_P_ int how)
		1049	{
		1050	loop_done = how;
		1051	}
		1052
		1053	/*****************************************************************************/
		1054
		1055	inline void
		1056	wlist_add (WL *head, WL elem)
325	{	1057	{
326	elem->next = *head;	1058	elem->next = *head;
327	*head = elem;	1059	*head = elem;
328	}	1060	}
329		1061
330	static void	1062	inline void
331	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1063	wlist_del (WL *head, WL elem)
332	{	1064	{
333	while (*head)	1065	while (*head)
334	{	1066	{
335	if (*head == elem)	1067	if (*head == elem)
336	{	1068	{
…		…
340		1072
341	head = &(*head)->next;	1073	head = &(*head)->next;
342	}	1074	}
343	}	1075	}
344		1076
345	static void	1077	inline void
346	ev_start (struct ev_watcher *w, int active)	1078	ev_clear_pending (EV_P_ W w)
347	{	1079	{
		1080	if (w->pending)
		1081	{
		1082	pendings [ABSPRI (w)][w->pending - 1].w = 0;
348	w->pending = 0;	1083	w->pending = 0;
		1084	}
		1085	}
		1086
		1087	inline void
		1088	ev_start (EV_P_ W w, int active)
		1089	{
		1090	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1091	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1092
349	w->active = active;	1093	w->active = active;
		1094	ev_ref (EV_A);
350	}	1095	}
351		1096
352	static void	1097	inline void
353	ev_stop (struct ev_watcher *w)	1098	ev_stop (EV_P_ W w)
354	{	1099	{
355	if (w->pending)	1100	ev_unref (EV_A);
356	pendings [w->pending - 1].w = 0;
357
358	w->active = 0;	1101	w->active = 0;
359	/* nop */
360	}	1102	}
361		1103
		1104	/*****************************************************************************/
		1105
362	void	1106	void
363	evio_start (struct ev_io *w)	1107	ev_io_start (EV_P_ struct ev_io *w)
364	{	1108	{
		1109	int fd = w->fd;
		1110
365	if (ev_is_active (w))	1111	if (ev_is_active (w))
366	return;	1112	return;
367		1113
368	int fd = w->fd;	1114	assert (("ev_io_start called with negative fd", fd >= 0));
369		1115
370	ev_start ((struct ev_watcher *)w, 1);	1116	ev_start (EV_A_ (W)w, 1);
371	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1117	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
372	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	1118	wlist_add ((WL *)&anfds[fd].head, (WL)w);
373		1119
374	++fdchangecnt;	1120	fd_change (EV_A_ fd);
375	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
376	fdchanges [fdchangecnt - 1] = fd;
377	}	1121	}
378		1122
379	void	1123	void
380	evio_stop (struct ev_io *w)	1124	ev_io_stop (EV_P_ struct ev_io *w)
381	{	1125	{
		1126	ev_clear_pending (EV_A_ (W)w);
382	if (!ev_is_active (w))	1127	if (!ev_is_active (w))
383	return;	1128	return;
384		1129
385	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	1130	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
386	ev_stop ((struct ev_watcher *)w);	1131	ev_stop (EV_A_ (W)w);
387		1132
388	++fdchangecnt;	1133	fd_change (EV_A_ w->fd);
389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
390	fdchanges [fdchangecnt - 1] = w->fd;
391	}	1134	}
392		1135
393	void	1136	void
394	evtimer_start (struct ev_timer *w)	1137	ev_timer_start (EV_P_ struct ev_timer *w)
395	{	1138	{
396	if (ev_is_active (w))	1139	if (ev_is_active (w))
397	return;	1140	return;
398		1141
399	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D	1142	((WT)w)->at += mn_now;
400	if (w->is_abs)
401	{
402	/* this formula differs from the one in timer_reify becuse we do not round up */
403	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
405	}
406	else
407	w->at += ev_now;
408	fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D
409		1143
410	ev_start ((struct ev_watcher *)w, ++timercnt);	1144	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1145
		1146	ev_start (EV_A_ (W)w, ++timercnt);
411	array_needsize (timers, timermax, timercnt, );	1147	array_needsize (timers, timermax, timercnt, );
412	timers [timercnt - 1] = w;	1148	timers [timercnt - 1] = w;
413	upheap (timercnt - 1);	1149	upheap ((WT *)timers, timercnt - 1);
414	}
415		1150
		1151	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1152	}
		1153
416	void	1154	void
417	evtimer_stop (struct ev_timer *w)	1155	ev_timer_stop (EV_P_ struct ev_timer *w)
418	{	1156	{
419	fprintf (stderr, "-topping %d, %d\n", w->active, timercnt);//D	1157	ev_clear_pending (EV_A_ (W)w);
420	if (!ev_is_active (w))	1158	if (!ev_is_active (w))
421	return;	1159	return;
422		1160
423	fprintf (stderr, "stopping %d, %d\n", w->active, timercnt);//D	1161	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1162
424	if (w->active < timercnt)	1163	if (((W)w)->active < timercnt--)
425	{	1164	{
426	timers [w->active - 1] = timers [--timercnt];	1165	timers [((W)w)->active - 1] = timers [timercnt];
427	downheap (w->active - 1);	1166	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
428	}	1167	}
429		1168
430	ev_stop ((struct ev_watcher *)w);	1169	((WT)w)->at = w->repeat;
431	}
432		1170
		1171	ev_stop (EV_A_ (W)w);
		1172	}
		1173
433	void	1174	void
434	evsignal_start (struct ev_signal *w)	1175	ev_timer_again (EV_P_ struct ev_timer *w)
435	{	1176	{
436	if (ev_is_active (w))	1177	if (ev_is_active (w))
437	return;	1178	{
		1179	if (w->repeat)
		1180	{
		1181	((WT)w)->at = mn_now + w->repeat;
		1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1183	}
		1184	else
		1185	ev_timer_stop (EV_A_ w);
		1186	}
		1187	else if (w->repeat)
		1188	ev_timer_start (EV_A_ w);
		1189	}
438		1190
439	ev_start ((struct ev_watcher *)w, 1);	1191	void
		1192	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1193	{
		1194	if (ev_is_active (w))
		1195	return;
		1196
		1197	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1198
		1199	/* this formula differs from the one in periodic_reify because we do not always round up */
		1200	if (w->interval)
		1201	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1202
		1203	ev_start (EV_A_ (W)w, ++periodiccnt);
		1204	array_needsize (periodics, periodicmax, periodiccnt, );
		1205	periodics [periodiccnt - 1] = w;
		1206	upheap ((WT *)periodics, periodiccnt - 1);
		1207
		1208	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1209	}
		1210
		1211	void
		1212	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1213	{
		1214	ev_clear_pending (EV_A_ (W)w);
		1215	if (!ev_is_active (w))
		1216	return;
		1217
		1218	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1219
		1220	if (((W)w)->active < periodiccnt--)
		1221	{
		1222	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1223	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
		1224	}
		1225
		1226	ev_stop (EV_A_ (W)w);
		1227	}
		1228
		1229	void
		1230	ev_idle_start (EV_P_ struct ev_idle *w)
		1231	{
		1232	if (ev_is_active (w))
		1233	return;
		1234
		1235	ev_start (EV_A_ (W)w, ++idlecnt);
		1236	array_needsize (idles, idlemax, idlecnt, );
		1237	idles [idlecnt - 1] = w;
		1238	}
		1239
		1240	void
		1241	ev_idle_stop (EV_P_ struct ev_idle *w)
		1242	{
		1243	ev_clear_pending (EV_A_ (W)w);
		1244	if (ev_is_active (w))
		1245	return;
		1246
		1247	idles [((W)w)->active - 1] = idles [--idlecnt];
		1248	ev_stop (EV_A_ (W)w);
		1249	}
		1250
		1251	void
		1252	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1253	{
		1254	if (ev_is_active (w))
		1255	return;
		1256
		1257	ev_start (EV_A_ (W)w, ++preparecnt);
		1258	array_needsize (prepares, preparemax, preparecnt, );
		1259	prepares [preparecnt - 1] = w;
		1260	}
		1261
		1262	void
		1263	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1264	{
		1265	ev_clear_pending (EV_A_ (W)w);
		1266	if (ev_is_active (w))
		1267	return;
		1268
		1269	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1270	ev_stop (EV_A_ (W)w);
		1271	}
		1272
		1273	void
		1274	ev_check_start (EV_P_ struct ev_check *w)
		1275	{
		1276	if (ev_is_active (w))
		1277	return;
		1278
		1279	ev_start (EV_A_ (W)w, ++checkcnt);
		1280	array_needsize (checks, checkmax, checkcnt, );
		1281	checks [checkcnt - 1] = w;
		1282	}
		1283
		1284	void
		1285	ev_check_stop (EV_P_ struct ev_check *w)
		1286	{
		1287	ev_clear_pending (EV_A_ (W)w);
		1288	if (ev_is_active (w))
		1289	return;
		1290
		1291	checks [((W)w)->active - 1] = checks [--checkcnt];
		1292	ev_stop (EV_A_ (W)w);
		1293	}
		1294
		1295	#ifndef SA_RESTART
		1296	# define SA_RESTART 0
		1297	#endif
		1298
		1299	void
		1300	ev_signal_start (EV_P_ struct ev_signal *w)
		1301	{
		1302	#if EV_MULTIPLICITY
		1303	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1304	#endif
		1305	if (ev_is_active (w))
		1306	return;
		1307
		1308	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1309
		1310	ev_start (EV_A_ (W)w, 1);
440	array_needsize (signals, signalmax, w->signum, signals_init);	1311	array_needsize (signals, signalmax, w->signum, signals_init);
441	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1312	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
442	}
443		1313
		1314	if (!((WL)w)->next)
		1315	{
		1316	struct sigaction sa;
		1317	sa.sa_handler = sighandler;
		1318	sigfillset (&sa.sa_mask);
		1319	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1320	sigaction (w->signum, &sa, 0);
		1321	}
		1322	}
		1323
444	void	1324	void
445	evsignal_stop (struct ev_signal *w)	1325	ev_signal_stop (EV_P_ struct ev_signal *w)
446	{	1326	{
		1327	ev_clear_pending (EV_A_ (W)w);
447	if (!ev_is_active (w))	1328	if (!ev_is_active (w))
448	return;	1329	return;
449		1330
450	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1331	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
451	ev_stop ((struct ev_watcher *)w);	1332	ev_stop (EV_A_ (W)w);
		1333
		1334	if (!signals [w->signum - 1].head)
		1335	signal (w->signum, SIG_DFL);
		1336	}
		1337
		1338	void
		1339	ev_child_start (EV_P_ struct ev_child *w)
		1340	{
		1341	#if EV_MULTIPLICITY
		1342	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1343	#endif
		1344	if (ev_is_active (w))
		1345	return;
		1346
		1347	ev_start (EV_A_ (W)w, 1);
		1348	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1349	}
		1350
		1351	void
		1352	ev_child_stop (EV_P_ struct ev_child *w)
		1353	{
		1354	ev_clear_pending (EV_A_ (W)w);
		1355	if (ev_is_active (w))
		1356	return;
		1357
		1358	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1359	ev_stop (EV_A_ (W)w);
452	}	1360	}
453		1361
454	/*****************************************************************************/	1362	/*****************************************************************************/
455	#if 1
456		1363
457	static void	1364	struct ev_once
458	sin_cb (struct ev_io *w, int revents)
459	{	1365	{
460	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
461	}
462
463	static void
464	ocb (struct ev_timer *w, int revents)
465	{
466	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
467	}
468
469	int main (void)
470	{
471	struct ev_io sin;	1366	struct ev_io io;
472
473	ev_init (0);
474
475	evw_init (&sin, sin_cb, 55);
476	evio_set (&sin, 0, EV_READ);
477	evio_start (&sin);
478
479	struct ev_timer t[1000];	1367	struct ev_timer to;
		1368	void (*cb)(int revents, void *arg);
		1369	void *arg;
		1370	};
480		1371
481	int i;	1372	static void
482	for (i = 0; i < 1000; ++i)	1373	once_cb (EV_P_ struct ev_once *once, int revents)
483	{	1374	{
484	struct ev_timer *w = t + i;	1375	void (*cb)(int revents, void *arg) = once->cb;
485	evw_init (w, ocb, i);	1376	void *arg = once->arg;
486	evtimer_set_rel (w, drand48 (), 0);	1377
487	evtimer_start (w);	1378	ev_io_stop (EV_A_ &once->io);
488	if (drand48 () < 0.5)	1379	ev_timer_stop (EV_A_ &once->to);
489	evtimer_stop (w);	1380	free (once);
		1381
		1382	cb (revents, arg);
		1383	}
		1384
		1385	static void
		1386	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1387	{
		1388	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1389	}
		1390
		1391	static void
		1392	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1393	{
		1394	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1395	}
		1396
		1397	void
		1398	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1399	{
		1400	struct ev_once *once = malloc (sizeof (struct ev_once));
		1401
		1402	if (!once)
		1403	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1404	else
490	}	1405	{
		1406	once->cb = cb;
		1407	once->arg = arg;
491		1408
492	ev_loop (0);	1409	ev_watcher_init (&once->io, once_cb_io);
		1410	if (fd >= 0)
		1411	{
		1412	ev_io_set (&once->io, fd, events);
		1413	ev_io_start (EV_A_ &once->io);
		1414	}
493		1415
494	return 0;	1416	ev_watcher_init (&once->to, once_cb_to);
		1417	if (timeout >= 0.)
		1418	{
		1419	ev_timer_set (&once->to, timeout, 0.);
		1420	ev_timer_start (EV_A_ &once->to);
		1421	}
		1422	}
495	}	1423	}
496		1424
497	#endif
498
499
500
501

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