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Comparing libev/ev.c (file contents):
Revision 1.1 by root, Tue Oct 30 20:59:31 2007 UTC vs.
Revision 1.56 by root, Sun Nov 4 15:58:49 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	#endif
		34
1	#include <math.h>	35	#include <math.h>
2	#include <stdlib.h>	36	#include <stdlib.h>
		37	#include <unistd.h>
		38	#include <fcntl.h>
		39	#include <signal.h>
		40	#include <stddef.h>
3		41
4	#include <stdio.h>	42	#include <stdio.h>
5		43
		44	#include <assert.h>
6	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
7	#include <sys/time.h>	50	#include <sys/time.h>
8	#include <time.h>	51	#include <time.h>
9		52
		53	/**/
		54
		55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
10	#ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
12	#endif	84	#endif
13		85
14	#define HAVE_EPOLL 1	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
15	#define HAVE_REALTIME 1	88	# define EV_USE_REALTIME 0
16	#define HAVE_SELECT 0	89	#endif
17		90
18	#define MAX_BLOCKTIME 60.	91	/**/
		92
		93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
19		97
20	#include "ev.h"	98	#include "ev.h"
21		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		113
22	struct ev_watcher {	114	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);	115	typedef struct ev_watcher_list *WL;
		116	typedef struct ev_watcher_time *WT;
		117
		118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		119
		120	/*****************************************************************************/
		121
		122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
24	};	141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
25		144
26	struct ev_watcher_list {	145	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		146
30	ev_tstamp ev_now;	147	# define VAR(name,decl) static decl;
31	int ev_method;	148	# include "ev_vars.h"
		149	# undef VAR
32		150
33	static int have_monotonic; /* runtime */	151	#endif
34		152
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	153	/*****************************************************************************/
36	static void (*method_reify)(void);
37	static void (*method_poll)(ev_tstamp timeout);
38		154
39	ev_tstamp	155	inline ev_tstamp
40	ev_time (void)	156	ev_time (void)
41	{	157	{
42	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
43	struct timespec ts;	159	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	162	#else
47	struct timeval tv;	163	struct timeval tv;
48	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	166	#endif
51	}	167	}
52		168
53	static ev_tstamp	169	inline ev_tstamp
54	get_clock (void)	170	get_clock (void)
55	{	171	{
56	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
57	if (have_monotonic)	173	if (expect_true (have_monotonic))
58	{	174	{
59	struct timespec ts;	175	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	178	}
63	#endif	179	#endif
64		180
65	return ev_time ();	181	return ev_time ();
66	}	182	}
67		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
		190	#define array_roundsize(base,n) ((n) | 4 & ~3)
		191
68	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
69	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
70	{ \	194	{ \
71	int newcnt = cur; \	195	int newcnt = cur; \
72	do \	196	do \
73	{ \	197	{ \
74	newcnt += (newcnt >> 1) + 16; \	198	newcnt = array_roundsize (base, newcnt << 1); \
75	} \	199	} \
76	while ((cnt) > newcnt); \	200	while ((cnt) > newcnt); \
77	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	201	\
78	base = realloc (base, sizeof (*base) * (newcnt)); \	202	base = realloc (base, sizeof (*base) * (newcnt)); \
79	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
80	cur = newcnt; \	204	cur = newcnt; \
81	}	205	}
82		206
83	typedef struct	207	/*****************************************************************************/
84	{
85	struct ev_io *head;
86	unsigned char wev, rev; /* want, received event set */
87	} ANFD;
88
89	static ANFD *anfds;
90	static int anfdmax;
91
92	static int *fdchanges;
93	static int fdchangemax, fdchangecnt;
94		208
95	static void	209	static void
96	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
97	{	211	{
98	while (count--)	212	while (count--)
99	{	213	{
100	base->head = 0;	214	base->head = 0;
101	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
102	++base;	218	++base;
103	}	219	}
104	}	220	}
105		221
106	typedef struct
107	{
108	struct ev_watcher *w;
109	int events;
110	} ANPENDING;
111
112	static ANPENDING *pendings;
113	static int pendingmax, pendingcnt;
114
115	static void	222	static void
116	event (struct ev_watcher *w, int events)	223	event (EV_P_ W w, int events)
117	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		228	return;
		229	}
		230
118	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
119	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
120	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
121	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
122	}	235	}
123		236
124	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
125	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
126	{	248	{
127	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
128	struct ev_io *w;	250	struct ev_io *w;
129		251
130	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
131	{	253	{
132	int ev = w->events & events;	254	int ev = w->events & events;
133		255
134	if (ev)	256	if (ev)
135	event ((struct ev_watcher *)w, ev);	257	event (EV_A_ (W)w, ev);
		258	}
		259	}
		260
		261	/*****************************************************************************/
		262
		263	static void
		264	fd_reify (EV_P)
		265	{
		266	int i;
		267
		268	for (i = 0; i < fdchangecnt; ++i)
		269	{
		270	int fd = fdchanges [i];
		271	ANFD *anfd = anfds + fd;
		272	struct ev_io *w;
		273
		274	int events = 0;
		275
		276	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		277	events |= w->events;
		278
		279	anfd->reify = 0;
		280
		281	if (anfd->events != events)
		282	{
		283	method_modify (EV_A_ fd, anfd->events, events);
		284	anfd->events = events;
		285	}
		286	}
		287
		288	fdchangecnt = 0;
		289	}
		290
		291	static void
		292	fd_change (EV_P_ int fd)
		293	{
		294	if (anfds [fd].reify || fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		313	}
		314	}
		315
		316	/* called on EBADF to verify fds */
		317	static void
		318	fd_ebadf (EV_P)
		319	{
		320	int fd;
		321
		322	for (fd = 0; fd < anfdmax; ++fd)
		323	if (anfds [fd].events)
		324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
		336	{
		337	close (fd);
		338	fd_kill (EV_A_ fd);
		339	return;
136	}	340	}
137	}	341	}
138		342
139	static struct ev_timer **timers;	343	/* susually called after fork if method needs to re-arm all fds from scratch */
140	static int timermax, timercnt;
141
142	static void	344	static void
143	upheap (int k)	345	fd_rearm_all (EV_P)
144	{	346	{
145	struct ev_timer *w = timers [k];	347	int fd;
146		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
		356	}
		357
		358	/*****************************************************************************/
		359
		360	static void
		361	upheap (WT *heap, int k)
		362	{
		363	WT w = heap [k];
		364
147	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
148	{	366	{
149	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
150	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
151	k >>= 1;	369	k >>= 1;
152	}	370	}
153		371
154	timers [k] = w;	372	heap [k] = w;
155	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
156		374
157	}	375	}
158		376
159	static void	377	static void
160	downheap (int k)	378	downheap (WT *heap, int N, int k)
161	{	379	{
162	struct ev_timer *w = timers [k];	380	WT w = heap [k];
163		381
164	while (k <= (timercnt >> 1))	382	while (k < (N >> 1))
165	{	383	{
166	int j = k << 1;	384	int j = k << 1;
167		385
168	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
169	++j;	387	++j;
170		388
171	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
172	break;	390	break;
173		391
174	timers [k] = timers [j];	392	heap [k] = heap [j];
175	timers [k]->active = k;	393	heap [k]->active = k + 1;
176	k = j;	394	k = j;
177	}	395	}
178		396
179	timers [k] = w;	397	heap [k] = w;
180	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
181	}	399	}
182		400
183	static struct ev_signal **signals;	401	/*****************************************************************************/
		402
		403	typedef struct
		404	{
		405	struct ev_watcher_list *head;
		406	sig_atomic_t volatile gotsig;
		407	} ANSIG;
		408
		409	static ANSIG *signals;
184	static int signalmax, signalcnt;	410	static int signalmax;
185		411
		412	static int sigpipe [2];
		413	static sig_atomic_t volatile gotsig;
		414
186	static void	415	static void
187	signals_init (struct ev_signal **base, int count)	416	signals_init (ANSIG *base, int count)
188	{	417	{
189	while (count--)	418	while (count--)
190	*base++ = 0;	419	{
191	}	420	base->head = 0;
		421	base->gotsig = 0;
192		422
		423	++base;
		424	}
		425	}
		426
		427	static void
		428	sighandler (int signum)
		429	{
		430	signals [signum - 1].gotsig = 1;
		431
		432	if (!gotsig)
		433	{
		434	int old_errno = errno;
		435	gotsig = 1;
		436	write (sigpipe [1], &signum, 1);
		437	errno = old_errno;
		438	}
		439	}
		440
		441	static void
		442	sigcb (EV_P_ struct ev_io *iow, int revents)
		443	{
		444	struct ev_watcher_list *w;
		445	int signum;
		446
		447	read (sigpipe [0], &revents, 1);
		448	gotsig = 0;
		449
		450	for (signum = signalmax; signum--; )
		451	if (signals [signum].gotsig)
		452	{
		453	signals [signum].gotsig = 0;
		454
		455	for (w = signals [signum].head; w; w = w->next)
		456	event (EV_A_ (W)w, EV_SIGNAL);
		457	}
		458	}
		459
		460	static void
		461	siginit (EV_P)
		462	{
		463	#ifndef WIN32
		464	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		465	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		466
		467	/* rather than sort out wether we really need nb, set it */
		468	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		469	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		470	#endif
		471
		472	ev_io_set (&sigev, sigpipe [0], EV_READ);
		473	ev_io_start (EV_A_ &sigev);
		474	ev_unref (EV_A); /* child watcher should not keep loop alive */
		475	}
		476
		477	/*****************************************************************************/
		478
		479	#ifndef WIN32
		480
		481	#ifndef WCONTINUED
		482	# define WCONTINUED 0
		483	#endif
		484
		485	static void
		486	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		487	{
		488	struct ev_child *w;
		489
		490	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		491	if (w->pid == pid || !w->pid)
		492	{
		493	w->priority = sw->priority; /* need to do it *now* */
		494	w->rpid = pid;
		495	w->rstatus = status;
		496	event (EV_A_ (W)w, EV_CHILD);
		497	}
		498	}
		499
		500	static void
		501	childcb (EV_P_ struct ev_signal *sw, int revents)
		502	{
		503	int pid, status;
		504
		505	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		506	{
		507	/* make sure we are called again until all childs have been reaped */
		508	event (EV_A_ (W)sw, EV_SIGNAL);
		509
		510	child_reap (EV_A_ sw, pid, pid, status);
		511	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		512	}
		513	}
		514
		515	#endif
		516
		517	/*****************************************************************************/
		518
		519	#if EV_USE_KQUEUE
		520	# include "ev_kqueue.c"
		521	#endif
193	#if HAVE_EPOLL	522	#if EV_USE_EPOLL
194	# include "ev_epoll.c"	523	# include "ev_epoll.c"
195	#endif	524	#endif
		525	#if EV_USEV_POLL
		526	# include "ev_poll.c"
		527	#endif
196	#if HAVE_SELECT	528	#if EV_USE_SELECT
197	# include "ev_select.c"	529	# include "ev_select.c"
198	#endif	530	#endif
199		531
200	int ev_init (int flags)	532	int
		533	ev_version_major (void)
201	{	534	{
		535	return EV_VERSION_MAJOR;
		536	}
		537
		538	int
		539	ev_version_minor (void)
		540	{
		541	return EV_VERSION_MINOR;
		542	}
		543
		544	/* return true if we are running with elevated privileges and should ignore env variables */
		545	static int
		546	enable_secure (void)
		547	{
		548	#ifdef WIN32
		549	return 0;
		550	#else
		551	return getuid () != geteuid ()
		552	|| getgid () != getegid ();
		553	#endif
		554	}
		555
		556	int
		557	ev_method (EV_P)
		558	{
		559	return method;
		560	}
		561
		562	static void
		563	loop_init (EV_P_ int methods)
		564	{
		565	if (!method)
		566	{
202	#if HAVE_MONOTONIC	567	#if EV_USE_MONOTONIC
203	{	568	{
204	struct timespec ts;	569	struct timespec ts;
205	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	570	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
206	have_monotonic = 1;	571	have_monotonic = 1;
207	}	572	}
208	#endif	573	#endif
209		574
210	ev_now = ev_time ();	575	rt_now = ev_time ();
		576	mn_now = get_clock ();
		577	now_floor = mn_now;
		578	rtmn_diff = rt_now - mn_now;
211		579
		580	if (methods == EVMETHOD_AUTO)
		581	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		582	methods = atoi (getenv ("LIBEV_METHODS"));
		583	else
		584	methods = EVMETHOD_ANY;
		585
		586	method = 0;
		587	#if EV_USE_KQUEUE
		588	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		589	#endif
212	#if HAVE_EPOLL	590	#if EV_USE_EPOLL
213	if (epoll_init (flags))	591	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
214	return ev_method;
215	#endif	592	#endif
		593	#if EV_USEV_POLL
		594	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		595	#endif
216	#if HAVE_SELECT	596	#if EV_USE_SELECT
217	if (select_init (flags))	597	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
218	return ev_method;
219	#endif	598	#endif
220
221	ev_method = EVMETHOD_NONE;
222	return ev_method;
223	}
224
225	void ev_prefork (void)
226	{
227	}
228
229	void ev_postfork_parent (void)
230	{
231	}
232
233	void ev_postfork_child (void)
234	{
235	#if HAVE_EPOLL
236	epoll_postfork_child ();
237	#endif
238	}
239
240	static void
241	call_pending ()
242	{
243	int i;
244
245	for (i = 0; i < pendingcnt; ++i)
246	{	599	}
247	ANPENDING *p = pendings + i;	600	}
248		601
249	if (p->w)	602	void
		603	loop_destroy (EV_P)
		604	{
		605	#if EV_USE_KQUEUE
		606	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		607	#endif
		608	#if EV_USE_EPOLL
		609	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		610	#endif
		611	#if EV_USEV_POLL
		612	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		613	#endif
		614	#if EV_USE_SELECT
		615	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		616	#endif
		617
		618	method = 0;
		619	/*TODO*/
		620	}
		621
		622	void
		623	loop_fork (EV_P)
		624	{
		625	/*TODO*/
		626	#if EV_USE_EPOLL
		627	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		628	#endif
		629	#if EV_USE_KQUEUE
		630	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		631	#endif
		632	}
		633
		634	#if EV_MULTIPLICITY
		635	struct ev_loop *
		636	ev_loop_new (int methods)
		637	{
		638	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		639
		640	loop_init (EV_A_ methods);
		641
		642	if (ev_methods (EV_A))
		643	return loop;
		644
		645	return 0;
		646	}
		647
		648	void
		649	ev_loop_destroy (EV_P)
		650	{
		651	loop_destroy (EV_A);
		652	free (loop);
		653	}
		654
		655	void
		656	ev_loop_fork (EV_P)
		657	{
		658	loop_fork (EV_A);
		659	}
		660
		661	#endif
		662
		663	#if EV_MULTIPLICITY
		664	struct ev_loop default_loop_struct;
		665	static struct ev_loop *default_loop;
		666
		667	struct ev_loop *
		668	#else
		669	static int default_loop;
		670
		671	int
		672	#endif
		673	ev_default_loop (int methods)
		674	{
		675	if (sigpipe [0] == sigpipe [1])
		676	if (pipe (sigpipe))
		677	return 0;
		678
		679	if (!default_loop)
		680	{
		681	#if EV_MULTIPLICITY
		682	struct ev_loop *loop = default_loop = &default_loop_struct;
		683	#else
		684	default_loop = 1;
		685	#endif
		686
		687	loop_init (EV_A_ methods);
		688
		689	if (ev_method (EV_A))
250	{	690	{
251	p->w->pending = 0;	691	ev_watcher_init (&sigev, sigcb);
252	p->w->cb (p->w, p->events);	692	ev_set_priority (&sigev, EV_MAXPRI);
		693	siginit (EV_A);
		694
		695	#ifndef WIN32
		696	ev_signal_init (&childev, childcb, SIGCHLD);
		697	ev_set_priority (&childev, EV_MAXPRI);
		698	ev_signal_start (EV_A_ &childev);
		699	ev_unref (EV_A); /* child watcher should not keep loop alive */
		700	#endif
253	}	701	}
		702	else
		703	default_loop = 0;
		704	}
		705
		706	return default_loop;
		707	}
		708
		709	void
		710	ev_default_destroy (void)
		711	{
		712	struct ev_loop *loop = default_loop;
		713
		714	ev_ref (EV_A); /* child watcher */
		715	ev_signal_stop (EV_A_ &childev);
		716
		717	ev_ref (EV_A); /* signal watcher */
		718	ev_io_stop (EV_A_ &sigev);
		719
		720	close (sigpipe [0]); sigpipe [0] = 0;
		721	close (sigpipe [1]); sigpipe [1] = 0;
		722
		723	loop_destroy (EV_A);
		724	}
		725
		726	void
		727	ev_default_fork (EV_P)
		728	{
		729	loop_fork (EV_A);
		730
		731	ev_io_stop (EV_A_ &sigev);
		732	close (sigpipe [0]);
		733	close (sigpipe [1]);
		734	pipe (sigpipe);
		735
		736	ev_ref (EV_A); /* signal watcher */
		737	siginit (EV_A);
		738	}
		739
		740	/*****************************************************************************/
		741
		742	static void
		743	call_pending (EV_P)
		744	{
		745	int pri;
		746
		747	for (pri = NUMPRI; pri--; )
		748	while (pendingcnt [pri])
		749	{
		750	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		751
		752	if (p->w)
		753	{
		754	p->w->pending = 0;
		755	p->w->cb (EV_A_ p->w, p->events);
		756	}
254	}	757	}
255
256	pendingcnt = 0;
257	}	758	}
258		759
259	static void	760	static void
260	timer_reify (void)	761	timers_reify (EV_P)
261	{	762	{
262	while (timercnt && timers [0]->at <= ev_now)	763	while (timercnt && timers [0]->at <= mn_now)
263	{	764	{
264	struct ev_timer *w = timers [0];	765	struct ev_timer *w = timers [0];
265		766
266	/* first reschedule timer */	767	/* first reschedule or stop timer */
267	if (w->repeat)	768	if (w->repeat)
268	{	769	{
269	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	770	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
270	if (w->is_abs)
271	w->at += floor ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
272	else
273	w->at = ev_now + w->repeat;	771	w->at = mn_now + w->repeat;
274		772	downheap ((WT *)timers, timercnt, 0);
275	fprintf (stderr, "b %f\n", w->at);//D
276
277	downheap (0);
278	}	773	}
279	else	774	else
280	evtimer_stop (w); /* nonrepeating: stop timer */	775	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
281		776
282	event ((struct ev_watcher *)w, EV_TIMEOUT);	777	event (EV_A_ (W)w, EV_TIMEOUT);
		778	}
		779	}
		780
		781	static void
		782	periodics_reify (EV_P)
		783	{
		784	while (periodiccnt && periodics [0]->at <= rt_now)
283	}	785	{
284	}	786	struct ev_periodic *w = periodics [0];
285		787
286	int ev_loop_done;	788	/* first reschedule or stop timer */
		789	if (w->interval)
		790	{
		791	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
		792	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		793	downheap ((WT *)periodics, periodiccnt, 0);
		794	}
		795	else
		796	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
287		797
		798	event (EV_A_ (W)w, EV_PERIODIC);
		799	}
		800	}
		801
		802	static void
		803	periodics_reschedule (EV_P)
		804	{
		805	int i;
		806
		807	/* adjust periodics after time jump */
		808	for (i = 0; i < periodiccnt; ++i)
		809	{
		810	struct ev_periodic *w = periodics [i];
		811
		812	if (w->interval)
		813	{
		814	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
		815
		816	if (fabs (diff) >= 1e-4)
		817	{
		818	ev_periodic_stop (EV_A_ w);
		819	ev_periodic_start (EV_A_ w);
		820
		821	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		822	}
		823	}
		824	}
		825	}
		826
		827	inline int
		828	time_update_monotonic (EV_P)
		829	{
		830	mn_now = get_clock ();
		831
		832	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		833	{
		834	rt_now = rtmn_diff + mn_now;
		835	return 0;
		836	}
		837	else
		838	{
		839	now_floor = mn_now;
		840	rt_now = ev_time ();
		841	return 1;
		842	}
		843	}
		844
		845	static void
		846	time_update (EV_P)
		847	{
		848	int i;
		849
		850	#if EV_USE_MONOTONIC
		851	if (expect_true (have_monotonic))
		852	{
		853	if (time_update_monotonic (EV_A))
		854	{
		855	ev_tstamp odiff = rtmn_diff;
		856
		857	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		858	{
		859	rtmn_diff = rt_now - mn_now;
		860
		861	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		862	return; /* all is well */
		863
		864	rt_now = ev_time ();
		865	mn_now = get_clock ();
		866	now_floor = mn_now;
		867	}
		868
		869	periodics_reschedule (EV_A);
		870	/* no timer adjustment, as the monotonic clock doesn't jump */
		871	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		872	}
		873	}
		874	else
		875	#endif
		876	{
		877	rt_now = ev_time ();
		878
		879	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		880	{
		881	periodics_reschedule (EV_A);
		882
		883	/* adjust timers. this is easy, as the offset is the same for all */
		884	for (i = 0; i < timercnt; ++i)
		885	timers [i]->at += rt_now - mn_now;
		886	}
		887
		888	mn_now = rt_now;
		889	}
		890	}
		891
		892	void
		893	ev_ref (EV_P)
		894	{
		895	++activecnt;
		896	}
		897
		898	void
		899	ev_unref (EV_P)
		900	{
		901	--activecnt;
		902	}
		903
		904	static int loop_done;
		905
		906	void
288	int ev_loop (int flags)	907	ev_loop (EV_P_ int flags)
289	{	908	{
290	double block;	909	double block;
291	ev_loop_done = flags & EVLOOP_ONESHOT;	910	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
292		911
293	do	912	do
294	{	913	{
		914	/* queue check watchers (and execute them) */
		915	if (expect_false (preparecnt))
		916	{
		917	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		918	call_pending (EV_A);
		919	}
		920
295	/* update fd-related kernel structures */	921	/* update fd-related kernel structures */
296	method_reify (); fdchangecnt = 0;	922	fd_reify (EV_A);
297		923
298	/* calculate blocking time */	924	/* calculate blocking time */
		925
		926	/* we only need this for !monotonic clockor timers, but as we basically
		927	always have timers, we just calculate it always */
		928	#if EV_USE_MONOTONIC
		929	if (expect_true (have_monotonic))
		930	time_update_monotonic (EV_A);
		931	else
		932	#endif
		933	{
299	ev_now = ev_time ();	934	rt_now = ev_time ();
		935	mn_now = rt_now;
		936	}
300		937
301	if (flags & EVLOOP_NONBLOCK)	938	if (flags & EVLOOP_NONBLOCK || idlecnt)
302	block = 0.;	939	block = 0.;
303	else if (!timercnt)
304	block = MAX_BLOCKTIME;
305	else	940	else
306	{	941	{
		942	block = MAX_BLOCKTIME;
		943
		944	if (timercnt)
		945	{
307	block = timers [0]->at - ev_now + method_fudge;	946	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
		947	if (block > to) block = to;
		948	}
		949
		950	if (periodiccnt)
		951	{
		952	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
		953	if (block > to) block = to;
		954	}
		955
308	if (block < 0.) block = 0.;	956	if (block < 0.) block = 0.;
309	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
310	}	957	}
311		958
312	fprintf (stderr, "block %f\n", block);//D
313	method_poll (block);	959	method_poll (EV_A_ block);
314		960
		961	/* update rt_now, do magic */
		962	time_update (EV_A);
		963
315	/* put pending timers into pendign queue and reschedule them */	964	/* queue pending timers and reschedule them */
316	timer_reify ();	965	timers_reify (EV_A); /* relative timers called last */
		966	periodics_reify (EV_A); /* absolute timers called first */
317		967
318	ev_now = ev_time ();	968	/* queue idle watchers unless io or timers are pending */
		969	if (!pendingcnt)
		970	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		971
		972	/* queue check watchers, to be executed first */
		973	if (checkcnt)
		974	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		975
319	call_pending ();	976	call_pending (EV_A);
320	}	977	}
321	while (!ev_loop_done);	978	while (activecnt && !loop_done);
322	}
323		979
324	static void	980	if (loop_done != 2)
325	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	981	loop_done = 0;
		982	}
		983
		984	void
		985	ev_unloop (EV_P_ int how)
		986	{
		987	loop_done = how;
		988	}
		989
		990	/*****************************************************************************/
		991
		992	inline void
		993	wlist_add (WL *head, WL elem)
326	{	994	{
327	elem->next = *head;	995	elem->next = *head;
328	*head = elem;	996	*head = elem;
329	}	997	}
330		998
331	static void	999	inline void
332	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1000	wlist_del (WL *head, WL elem)
333	{	1001	{
334	while (*head)	1002	while (*head)
335	{	1003	{
336	if (*head == elem)	1004	if (*head == elem)
337	{	1005	{
…		…
341		1009
342	head = &(*head)->next;	1010	head = &(*head)->next;
343	}	1011	}
344	}	1012	}
345		1013
346	static void	1014	inline void
347	ev_start (struct ev_watcher *w, int active)	1015	ev_clear_pending (EV_P_ W w)
348	{	1016	{
		1017	if (w->pending)
		1018	{
		1019	pendings [ABSPRI (w)][w->pending - 1].w = 0;
349	w->pending = 0;	1020	w->pending = 0;
		1021	}
		1022	}
		1023
		1024	inline void
		1025	ev_start (EV_P_ W w, int active)
		1026	{
		1027	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1028	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1029
350	w->active = active;	1030	w->active = active;
		1031	ev_ref (EV_A);
351	}	1032	}
352		1033
353	static void	1034	inline void
354	ev_stop (struct ev_watcher *w)	1035	ev_stop (EV_P_ W w)
355	{	1036	{
356	if (w->pending)	1037	ev_unref (EV_A);
357	pendings [w->pending - 1].w = 0;
358
359	w->active = 0;	1038	w->active = 0;
360	/* nop */
361	}	1039	}
362		1040
		1041	/*****************************************************************************/
		1042
363	void	1043	void
364	evio_start (struct ev_io *w)	1044	ev_io_start (EV_P_ struct ev_io *w)
365	{	1045	{
		1046	int fd = w->fd;
		1047
366	if (ev_is_active (w))	1048	if (ev_is_active (w))
367	return;	1049	return;
368		1050
369	int fd = w->fd;	1051	assert (("ev_io_start called with negative fd", fd >= 0));
370		1052
371	ev_start ((struct ev_watcher *)w, 1);	1053	ev_start (EV_A_ (W)w, 1);
372	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1054	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
373	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	1055	wlist_add ((WL *)&anfds[fd].head, (WL)w);
374		1056
375	++fdchangecnt;	1057	fd_change (EV_A_ fd);
376	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
377	fdchanges [fdchangecnt - 1] = fd;
378	}	1058	}
379		1059
380	void	1060	void
381	evio_stop (struct ev_io *w)	1061	ev_io_stop (EV_P_ struct ev_io *w)
382	{	1062	{
		1063	ev_clear_pending (EV_A_ (W)w);
383	if (!ev_is_active (w))	1064	if (!ev_is_active (w))
384	return;	1065	return;
385		1066
386	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	1067	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
387	ev_stop ((struct ev_watcher *)w);	1068	ev_stop (EV_A_ (W)w);
388		1069
389	++fdchangecnt;	1070	fd_change (EV_A_ w->fd);
390	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
391	fdchanges [fdchangecnt - 1] = w->fd;
392	}	1071	}
393		1072
394	void	1073	void
395	evtimer_start (struct ev_timer *w)	1074	ev_timer_start (EV_P_ struct ev_timer *w)
396	{	1075	{
397	if (ev_is_active (w))	1076	if (ev_is_active (w))
398	return;	1077	return;
399		1078
400	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D
401	if (w->is_abs)
402	{
403	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
405	}
406	else
407	w->at += ev_now;	1079	w->at += mn_now;
408	fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D
409		1080
410	ev_start ((struct ev_watcher *)w, ++timercnt);	1081	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1082
		1083	ev_start (EV_A_ (W)w, ++timercnt);
411	array_needsize (timers, timermax, timercnt, );	1084	array_needsize (timers, timermax, timercnt, );
412	timers [timercnt - 1] = w;	1085	timers [timercnt - 1] = w;
413	upheap (timercnt - 1);	1086	upheap ((WT *)timers, timercnt - 1);
414	}	1087	}
415		1088
416	void	1089	void
417	evtimer_stop (struct ev_timer *w)	1090	ev_timer_stop (EV_P_ struct ev_timer *w)
418	{	1091	{
		1092	ev_clear_pending (EV_A_ (W)w);
419	if (!ev_is_active (w))	1093	if (!ev_is_active (w))
420	return;	1094	return;
421		1095
		1096	if (w->active < timercnt--)
		1097	{
422	timers [w->active - 1] = timers [--timercnt];	1098	timers [w->active - 1] = timers [timercnt];
423	downheap (w->active - 1);	1099	downheap ((WT *)timers, timercnt, w->active - 1);
424	ev_stop ((struct ev_watcher *)w);	1100	}
425	}
426		1101
		1102	w->at = w->repeat;
		1103
		1104	ev_stop (EV_A_ (W)w);
		1105	}
		1106
427	void	1107	void
428	evsignal_start (struct ev_signal *w)	1108	ev_timer_again (EV_P_ struct ev_timer *w)
429	{	1109	{
430	if (ev_is_active (w))	1110	if (ev_is_active (w))
431	return;	1111	{
		1112	if (w->repeat)
		1113	{
		1114	w->at = mn_now + w->repeat;
		1115	downheap ((WT *)timers, timercnt, w->active - 1);
		1116	}
		1117	else
		1118	ev_timer_stop (EV_A_ w);
		1119	}
		1120	else if (w->repeat)
		1121	ev_timer_start (EV_A_ w);
		1122	}
432		1123
433	ev_start ((struct ev_watcher *)w, 1);	1124	void
		1125	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1126	{
		1127	if (ev_is_active (w))
		1128	return;
		1129
		1130	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1131
		1132	/* this formula differs from the one in periodic_reify because we do not always round up */
		1133	if (w->interval)
		1134	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
		1135
		1136	ev_start (EV_A_ (W)w, ++periodiccnt);
		1137	array_needsize (periodics, periodicmax, periodiccnt, );
		1138	periodics [periodiccnt - 1] = w;
		1139	upheap ((WT *)periodics, periodiccnt - 1);
		1140	}
		1141
		1142	void
		1143	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1144	{
		1145	ev_clear_pending (EV_A_ (W)w);
		1146	if (!ev_is_active (w))
		1147	return;
		1148
		1149	if (w->active < periodiccnt--)
		1150	{
		1151	periodics [w->active - 1] = periodics [periodiccnt];
		1152	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		1153	}
		1154
		1155	ev_stop (EV_A_ (W)w);
		1156	}
		1157
		1158	void
		1159	ev_idle_start (EV_P_ struct ev_idle *w)
		1160	{
		1161	if (ev_is_active (w))
		1162	return;
		1163
		1164	ev_start (EV_A_ (W)w, ++idlecnt);
		1165	array_needsize (idles, idlemax, idlecnt, );
		1166	idles [idlecnt - 1] = w;
		1167	}
		1168
		1169	void
		1170	ev_idle_stop (EV_P_ struct ev_idle *w)
		1171	{
		1172	ev_clear_pending (EV_A_ (W)w);
		1173	if (ev_is_active (w))
		1174	return;
		1175
		1176	idles [w->active - 1] = idles [--idlecnt];
		1177	ev_stop (EV_A_ (W)w);
		1178	}
		1179
		1180	void
		1181	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1182	{
		1183	if (ev_is_active (w))
		1184	return;
		1185
		1186	ev_start (EV_A_ (W)w, ++preparecnt);
		1187	array_needsize (prepares, preparemax, preparecnt, );
		1188	prepares [preparecnt - 1] = w;
		1189	}
		1190
		1191	void
		1192	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1193	{
		1194	ev_clear_pending (EV_A_ (W)w);
		1195	if (ev_is_active (w))
		1196	return;
		1197
		1198	prepares [w->active - 1] = prepares [--preparecnt];
		1199	ev_stop (EV_A_ (W)w);
		1200	}
		1201
		1202	void
		1203	ev_check_start (EV_P_ struct ev_check *w)
		1204	{
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	ev_start (EV_A_ (W)w, ++checkcnt);
		1209	array_needsize (checks, checkmax, checkcnt, );
		1210	checks [checkcnt - 1] = w;
		1211	}
		1212
		1213	void
		1214	ev_check_stop (EV_P_ struct ev_check *w)
		1215	{
		1216	ev_clear_pending (EV_A_ (W)w);
		1217	if (ev_is_active (w))
		1218	return;
		1219
		1220	checks [w->active - 1] = checks [--checkcnt];
		1221	ev_stop (EV_A_ (W)w);
		1222	}
		1223
		1224	#ifndef SA_RESTART
		1225	# define SA_RESTART 0
		1226	#endif
		1227
		1228	void
		1229	ev_signal_start (EV_P_ struct ev_signal *w)
		1230	{
		1231	#if EV_MULTIPLICITY
		1232	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1233	#endif
		1234	if (ev_is_active (w))
		1235	return;
		1236
		1237	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1238
		1239	ev_start (EV_A_ (W)w, 1);
434	array_needsize (signals, signalmax, w->signum, signals_init);	1240	array_needsize (signals, signalmax, w->signum, signals_init);
435	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1241	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
436	}
437		1242
		1243	if (!w->next)
		1244	{
		1245	struct sigaction sa;
		1246	sa.sa_handler = sighandler;
		1247	sigfillset (&sa.sa_mask);
		1248	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1249	sigaction (w->signum, &sa, 0);
		1250	}
		1251	}
		1252
438	void	1253	void
439	evsignal_stop (struct ev_signal *w)	1254	ev_signal_stop (EV_P_ struct ev_signal *w)
440	{	1255	{
		1256	ev_clear_pending (EV_A_ (W)w);
441	if (!ev_is_active (w))	1257	if (!ev_is_active (w))
442	return;	1258	return;
443		1259
444	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1260	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
445	ev_stop ((struct ev_watcher *)w);	1261	ev_stop (EV_A_ (W)w);
		1262
		1263	if (!signals [w->signum - 1].head)
		1264	signal (w->signum, SIG_DFL);
		1265	}
		1266
		1267	void
		1268	ev_child_start (EV_P_ struct ev_child *w)
		1269	{
		1270	#if EV_MULTIPLICITY
		1271	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1272	#endif
		1273	if (ev_is_active (w))
		1274	return;
		1275
		1276	ev_start (EV_A_ (W)w, 1);
		1277	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1278	}
		1279
		1280	void
		1281	ev_child_stop (EV_P_ struct ev_child *w)
		1282	{
		1283	ev_clear_pending (EV_A_ (W)w);
		1284	if (ev_is_active (w))
		1285	return;
		1286
		1287	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1288	ev_stop (EV_A_ (W)w);
446	}	1289	}
447		1290
448	/*****************************************************************************/	1291	/*****************************************************************************/
449	#if 1
450		1292
451	static void	1293	struct ev_once
452	sin_cb (struct ev_io *w, int revents)
453	{	1294	{
454	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
455	}
456
457	static void
458	ocb (struct ev_timer *w, int revents)
459	{
460	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
461	}
462
463	int main (void)
464	{
465	struct ev_io sin;	1295	struct ev_io io;
466
467	ev_init (0);
468
469	evw_init (&sin, sin_cb, 55);
470	evio_set (&sin, 0, EV_READ);
471	evio_start (&sin);
472
473	struct ev_timer t1;	1296	struct ev_timer to;
474	evw_init (&t1, ocb, 1);	1297	void (*cb)(int revents, void *arg);
475	evtimer_set_rel (&t1, 1, 0);	1298	void *arg;
476	evtimer_start (&t1);	1299	};
477		1300
478	struct ev_timer t2;	1301	static void
479	evw_init (&t2, ocb, 2);	1302	once_cb (EV_P_ struct ev_once *once, int revents)
480	evtimer_set_abs (&t2, ev_time () + 2, 0);	1303	{
481	evtimer_start (&t2);	1304	void (*cb)(int revents, void *arg) = once->cb;
		1305	void *arg = once->arg;
482		1306
483	ev_loop (0);	1307	ev_io_stop (EV_A_ &once->io);
		1308	ev_timer_stop (EV_A_ &once->to);
		1309	free (once);
484		1310
485	return 0;	1311	cb (revents, arg);
486	}	1312	}
487		1313
488	#endif	1314	static void
		1315	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1316	{
		1317	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1318	}
489		1319
		1320	static void
		1321	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1322	{
		1323	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1324	}
490		1325
		1326	void
		1327	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1328	{
		1329	struct ev_once *once = malloc (sizeof (struct ev_once));
491		1330
		1331	if (!once)
		1332	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1333	else
		1334	{
		1335	once->cb = cb;
		1336	once->arg = arg;
492		1337
		1338	ev_watcher_init (&once->io, once_cb_io);
		1339	if (fd >= 0)
		1340	{
		1341	ev_io_set (&once->io, fd, events);
		1342	ev_io_start (EV_A_ &once->io);
		1343	}
		1344
		1345	ev_watcher_init (&once->to, once_cb_to);
		1346	if (timeout >= 0.)
		1347	{
		1348	ev_timer_set (&once->to, timeout, 0.);
		1349	ev_timer_start (EV_A_ &once->to);
		1350	}
		1351	}
		1352	}
		1353

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