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Comparing libev/ev.c (file contents):
Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs.
Revision 1.48 by root, Sat Nov 3 12:19:31 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	#if EV_USE_CONFIG_H
		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_USE_POLL
		64	# define EV_USE_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);
24	};
25
26	struct ev_watcher_list {	115	typedef struct ev_watcher_list *WL;
27	EV_WATCHER_LIST (ev_watcher_list);	116	typedef struct ev_watcher_time *WT;
28	};
29		117
		118	static ev_tstamp now_floor, now, diff; /* monotonic clock */
30	ev_tstamp ev_now;	119	ev_tstamp ev_now;
31	int ev_method;	120	int ev_method;
32		121
33	static int have_monotonic; /* runtime */	122	static int have_monotonic; /* runtime */
34		123
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
36	static void (*method_reify)(void);	125	static void (*method_modify)(int fd, int oev, int nev);
37	static void (*method_poll)(ev_tstamp timeout);	126	static void (*method_poll)(ev_tstamp timeout);
		127
		128	/*****************************************************************************/
38		129
39	ev_tstamp	130	ev_tstamp
40	ev_time (void)	131	ev_time (void)
41	{	132	{
42	#if HAVE_REALTIME	133	#if EV_USE_REALTIME
43	struct timespec ts;	134	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	135	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	136	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	137	#else
47	struct timeval tv;	138	struct timeval tv;
…		…
51	}	142	}
52		143
53	static ev_tstamp	144	static ev_tstamp
54	get_clock (void)	145	get_clock (void)
55	{	146	{
56	#if HAVE_MONOTONIC	147	#if EV_USE_MONOTONIC
57	if (have_monotonic)	148	if (expect_true (have_monotonic))
58	{	149	{
59	struct timespec ts;	150	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	151	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	152	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	153	}
63	#endif	154	#endif
64		155
65	return ev_time ();	156	return ev_time ();
66	}	157	}
67		158
		159	#define array_roundsize(base,n) ((n) | 4 & ~3)
		160
68	#define array_needsize(base,cur,cnt,init) \	161	#define array_needsize(base,cur,cnt,init) \
69	if ((cnt) > cur) \	162	if (expect_false ((cnt) > cur)) \
70	{ \	163	{ \
71	int newcnt = cur ? cur << 1 : 16; \	164	int newcnt = cur; \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	165	do \
		166	{ \
		167	newcnt = array_roundsize (base, newcnt << 1); \
		168	} \
		169	while ((cnt) > newcnt); \
		170	\
73	base = realloc (base, sizeof (*base) * (newcnt)); \	171	base = realloc (base, sizeof (*base) * (newcnt)); \
74	init (base + cur, newcnt - cur); \	172	init (base + cur, newcnt - cur); \
75	cur = newcnt; \	173	cur = newcnt; \
76	}	174	}
77		175
		176	/*****************************************************************************/
		177
78	typedef struct	178	typedef struct
79	{	179	{
80	struct ev_io *head;	180	struct ev_io *head;
81	unsigned char wev, rev; /* want, received event set */	181	unsigned char events;
		182	unsigned char reify;
82	} ANFD;	183	} ANFD;
83		184
84	static ANFD *anfds;	185	static ANFD *anfds;
85	static int anfdmax;	186	static int anfdmax;
86		187
		188	static void
		189	anfds_init (ANFD *base, int count)
		190	{
		191	while (count--)
		192	{
		193	base->head = 0;
		194	base->events = EV_NONE;
		195	base->reify = 0;
		196
		197	++base;
		198	}
		199	}
		200
		201	typedef struct
		202	{
		203	W w;
		204	int events;
		205	} ANPENDING;
		206
		207	static ANPENDING *pendings [NUMPRI];
		208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
		209
		210	static void
		211	event (W w, int events)
		212	{
		213	if (w->pending)
		214	{
		215	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		216	return;
		217	}
		218
		219	w->pending = ++pendingcnt [ABSPRI (w)];
		220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		221	pendings [ABSPRI (w)][w->pending - 1].w = w;
		222	pendings [ABSPRI (w)][w->pending - 1].events = events;
		223	}
		224
		225	static void
		226	queue_events (W *events, int eventcnt, int type)
		227	{
		228	int i;
		229
		230	for (i = 0; i < eventcnt; ++i)
		231	event (events [i], type);
		232	}
		233
		234	static void
		235	fd_event (int fd, int events)
		236	{
		237	ANFD *anfd = anfds + fd;
		238	struct ev_io *w;
		239
		240	for (w = anfd->head; w; w = w->next)
		241	{
		242	int ev = w->events & events;
		243
		244	if (ev)
		245	event ((W)w, ev);
		246	}
		247	}
		248
		249	/*****************************************************************************/
		250
87	static int *fdchanges;	251	static int *fdchanges;
88	static int fdchangemax, fdchangecnt;	252	static int fdchangemax, fdchangecnt;
89		253
90	static void	254	static void
91	anfds_init (ANFD *base, int count)	255	fd_reify (void)
92	{	256	{
93	while (count--)	257	int i;
94	{	258
95	base->head = 0;	259	for (i = 0; i < fdchangecnt; ++i)
96	base->wev = base->rev = EV_NONE;
97	++base;
98	}	260	{
99	}	261	int fd = fdchanges [i];
100
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
111	event (struct ev_watcher *w, int events)
112	{
113	w->pending = ++pendingcnt;
114	array_needsize (pendings, pendingmax, pendingcnt, );
115	pendings [pendingcnt - 1].w = w;
116	pendings [pendingcnt - 1].events = events;
117	}
118
119	static void
120	fd_event (int fd, int events)
121	{
122	ANFD *anfd = anfds + fd;	262	ANFD *anfd = anfds + fd;
		263	struct ev_io *w;
		264
		265	int events = 0;
		266
		267	for (w = anfd->head; w; w = w->next)
		268	events |= w->events;
		269
		270	anfd->reify = 0;
		271
		272	if (anfd->events != events)
		273	{
		274	method_modify (fd, anfd->events, events);
		275	anfd->events = events;
		276	}
		277	}
		278
		279	fdchangecnt = 0;
		280	}
		281
		282	static void
		283	fd_change (int fd)
		284	{
		285	if (anfds [fd].reify || fdchangecnt < 0)
		286	return;
		287
		288	anfds [fd].reify = 1;
		289
		290	++fdchangecnt;
		291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		292	fdchanges [fdchangecnt - 1] = fd;
		293	}
		294
		295	static void
		296	fd_kill (int fd)
		297	{
123	struct ev_io *w;	298	struct ev_io *w;
124		299
125	for (w = anfd->head; w; w = w->next)	300	printf ("killing fd %d\n", fd);//D
		301	while ((w = anfds [fd].head))
		302	{
		303	ev_io_stop (w);
		304	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);
		305	}
		306	}
		307
		308	/* called on EBADF to verify fds */
		309	static void
		310	fd_ebadf (void)
		311	{
		312	int fd;
		313
		314	for (fd = 0; fd < anfdmax; ++fd)
		315	if (anfds [fd].events)
		316	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		317	fd_kill (fd);
		318	}
		319
		320	/* called on ENOMEM in select/poll to kill some fds and retry */
		321	static void
		322	fd_enomem (void)
		323	{
		324	int fd = anfdmax;
		325
		326	while (fd--)
		327	if (anfds [fd].events)
126	{	328	{
127	int ev = w->events & events;	329	close (fd);
128		330	fd_kill (fd);
129	if (ev)	331	return;
130	event ((struct ev_watcher *)w, ev);
131	}	332	}
132	}	333	}
		334
		335	/*****************************************************************************/
133		336
134	static struct ev_timer **timers;	337	static struct ev_timer **timers;
135	static int timermax, timercnt;	338	static int timermax, timercnt;
136		339
		340	static struct ev_periodic **periodics;
		341	static int periodicmax, periodiccnt;
		342
137	static void	343	static void
138	upheap (int k)	344	upheap (WT *timers, int k)
139	{	345	{
140	struct ev_timer *w = timers [k];	346	WT w = timers [k];
141		347
142	while (k && timers [k >> 1]->at > w->at)	348	while (k && timers [k >> 1]->at > w->at)
143	{	349	{
144	timers [k] = timers [k >> 1];	350	timers [k] = timers [k >> 1];
145	timers [k]->active = k + 1;	351	timers [k]->active = k + 1;
…		…
150	timers [k]->active = k + 1;	356	timers [k]->active = k + 1;
151		357
152	}	358	}
153		359
154	static void	360	static void
155	downheap (int k)	361	downheap (WT *timers, int N, int k)
156	{	362	{
157	struct ev_timer *w = timers [k];	363	WT w = timers [k];
158		364
159	while (k < (timercnt >> 1))	365	while (k < (N >> 1))
160	{	366	{
161	int j = k << 1;	367	int j = k << 1;
162		368
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	369	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
164	++j;	370	++j;
165		371
166	if (w->at <= timers [j]->at)	372	if (w->at <= timers [j]->at)
167	break;	373	break;
168		374
…		…
173		379
174	timers [k] = w;	380	timers [k] = w;
175	timers [k]->active = k + 1;	381	timers [k]->active = k + 1;
176	}	382	}
177		383
178	static struct ev_signal **signals;	384	/*****************************************************************************/
		385
		386	typedef struct
		387	{
		388	struct ev_signal *head;
		389	sig_atomic_t volatile gotsig;
		390	} ANSIG;
		391
		392	static ANSIG *signals;
179	static int signalmax, signalcnt;	393	static int signalmax;
180		394
		395	static int sigpipe [2];
		396	static sig_atomic_t volatile gotsig;
		397	static struct ev_io sigev;
		398
181	static void	399	static void
182	signals_init (struct ev_signal **base, int count)	400	signals_init (ANSIG *base, int count)
183	{	401	{
184	while (count--)	402	while (count--)
185	*base++ = 0;	403	{
186	}	404	base->head = 0;
		405	base->gotsig = 0;
187		406
		407	++base;
		408	}
		409	}
		410
		411	static void
		412	sighandler (int signum)
		413	{
		414	signals [signum - 1].gotsig = 1;
		415
		416	if (!gotsig)
		417	{
		418	int old_errno = errno;
		419	gotsig = 1;
		420	write (sigpipe [1], &signum, 1);
		421	errno = old_errno;
		422	}
		423	}
		424
		425	static void
		426	sigcb (struct ev_io *iow, int revents)
		427	{
		428	struct ev_signal *w;
		429	int signum;
		430
		431	read (sigpipe [0], &revents, 1);
		432	gotsig = 0;
		433
		434	for (signum = signalmax; signum--; )
		435	if (signals [signum].gotsig)
		436	{
		437	signals [signum].gotsig = 0;
		438
		439	for (w = signals [signum].head; w; w = w->next)
		440	event ((W)w, EV_SIGNAL);
		441	}
		442	}
		443
		444	static void
		445	siginit (void)
		446	{
		447	#ifndef WIN32
		448	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		449	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		450
		451	/* rather than sort out wether we really need nb, set it */
		452	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		453	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		454	#endif
		455
		456	ev_io_set (&sigev, sigpipe [0], EV_READ);
		457	ev_io_start (&sigev);
		458	}
		459
		460	/*****************************************************************************/
		461
		462	static struct ev_idle **idles;
		463	static int idlemax, idlecnt;
		464
		465	static struct ev_prepare **prepares;
		466	static int preparemax, preparecnt;
		467
		468	static struct ev_check **checks;
		469	static int checkmax, checkcnt;
		470
		471	/*****************************************************************************/
		472
		473	static struct ev_child *childs [PID_HASHSIZE];
		474	static struct ev_signal childev;
		475
		476	#ifndef WIN32
		477
		478	#ifndef WCONTINUED
		479	# define WCONTINUED 0
		480	#endif
		481
		482	static void
		483	child_reap (struct ev_signal *sw, int chain, int pid, int status)
		484	{
		485	struct ev_child *w;
		486
		487	for (w = childs [chain & (PID_HASHSIZE - 1)]; w; w = w->next)
		488	if (w->pid == pid || !w->pid)
		489	{
		490	w->priority = sw->priority; /* need to do it *now* */
		491	w->rpid = pid;
		492	w->rstatus = status;
		493	printf ("rpid %p %d %d\n", w, pid, w->pid);//D
		494	event ((W)w, EV_CHILD);
		495	}
		496	}
		497
		498	static void
		499	childcb (struct ev_signal *sw, int revents)
		500	{
		501	int pid, status;
		502
		503	printf ("chld %x\n", revents);//D
		504	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		505	{
		506	/* make sure we are called again until all childs have been reaped */
		507	event ((W)sw, EV_SIGNAL);
		508
		509	child_reap (sw, pid, pid, status);
		510	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		511	}
		512	}
		513
		514	#endif
		515
		516	/*****************************************************************************/
		517
		518	#if EV_USE_KQUEUE
		519	# include "ev_kqueue.c"
		520	#endif
188	#if HAVE_EPOLL	521	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	522	# include "ev_epoll.c"
190	#endif	523	#endif
		524	#if EV_USE_POLL
		525	# include "ev_poll.c"
		526	#endif
191	#if HAVE_SELECT	527	#if EV_USE_SELECT
192	# include "ev_select.c"	528	# include "ev_select.c"
193	#endif	529	#endif
194		530
		531	int
		532	ev_version_major (void)
		533	{
		534	return EV_VERSION_MAJOR;
		535	}
		536
		537	int
		538	ev_version_minor (void)
		539	{
		540	return EV_VERSION_MINOR;
		541	}
		542
		543	/* return true if we are running with elevated privileges and ignore env variables */
		544	static int
		545	enable_secure ()
		546	{
		547	return getuid () != geteuid ()
		548	|| getgid () != getegid ();
		549	}
		550
195	int ev_init (int flags)	551	int ev_init (int methods)
196	{	552	{
		553	if (!ev_method)
		554	{
197	#if HAVE_MONOTONIC	555	#if EV_USE_MONOTONIC
198	{	556	{
199	struct timespec ts;	557	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	558	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	559	have_monotonic = 1;
202	}	560	}
203	#endif	561	#endif
204		562
205	ev_now = ev_time ();	563	ev_now = ev_time ();
		564	now = get_clock ();
		565	now_floor = now;
		566	diff = ev_now - now;
206		567
		568	if (pipe (sigpipe))
		569	return 0;
		570
		571	if (methods == EVMETHOD_AUTO)
		572	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		573	methods = atoi (getenv ("LIBEV_METHODS"));
		574	else
		575	methods = EVMETHOD_ANY;
		576
		577	ev_method = 0;
		578	#if EV_USE_KQUEUE
		579	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
		580	#endif
207	#if HAVE_EPOLL	581	#if EV_USE_EPOLL
208	if (epoll_init (flags))	582	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
209	return ev_method;
210	#endif	583	#endif
		584	#if EV_USE_POLL
		585	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
		586	#endif
211	#if HAVE_SELECT	587	#if EV_USE_SELECT
212	if (select_init (flags))	588	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
213	return ev_method;
214	#endif	589	#endif
215		590
216	ev_method = EVMETHOD_NONE;	591	if (ev_method)
		592	{
		593	ev_watcher_init (&sigev, sigcb);
		594	ev_set_priority (&sigev, EV_MAXPRI);
		595	siginit ();
		596
		597	#ifndef WIN32
		598	ev_signal_init (&childev, childcb, SIGCHLD);
		599	ev_set_priority (&childev, EV_MAXPRI);
		600	ev_signal_start (&childev);
		601	#endif
		602	}
		603	}
		604
217	return ev_method;	605	return ev_method;
218	}	606	}
219		607
220	void ev_prefork (void)	608	/*****************************************************************************/
221	{
222	}
223		609
		610	void
		611	ev_fork_prepare (void)
		612	{
		613	/* nop */
		614	}
		615
		616	void
224	void ev_postfork_parent (void)	617	ev_fork_parent (void)
225	{	618	{
		619	/* nop */
226	}	620	}
227		621
		622	void
228	void ev_postfork_child (void)	623	ev_fork_child (void)
229	{	624	{
230	#if HAVE_EPOLL	625	#if EV_USE_EPOLL
		626	if (ev_method == EVMETHOD_EPOLL)
231	epoll_postfork_child ();	627	epoll_postfork_child ();
232	#endif	628	#endif
233	}
234		629
		630	ev_io_stop (&sigev);
		631	close (sigpipe [0]);
		632	close (sigpipe [1]);
		633	pipe (sigpipe);
		634	siginit ();
		635	}
		636
		637	/*****************************************************************************/
		638
235	static void	639	static void
236	call_pending ()	640	call_pending (void)
237	{	641	{
238	int i;	642	int pri;
239		643
240	for (i = 0; i < pendingcnt; ++i)	644	for (pri = NUMPRI; pri--; )
		645	while (pendingcnt [pri])
241	{	646	{
242	ANPENDING *p = pendings + i;	647	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
243		648
244	if (p->w)	649	if (p->w)
245	{	650	{
246	p->w->pending = 0;	651	p->w->pending = 0;
247	p->w->cb (p->w, p->events);	652	p->w->cb (p->w, p->events);
248	}	653	}
249	}	654	}
250
251	pendingcnt = 0;
252	}	655	}
253		656
254	static void	657	static void
255	timer_reify (void)	658	timers_reify (void)
256	{	659	{
257	while (timercnt && timers [0]->at <= ev_now)	660	while (timercnt && timers [0]->at <= now)
258	{	661	{
259	struct ev_timer *w = timers [0];	662	struct ev_timer *w = timers [0];
260		663
261	/* first reschedule timer */	664	/* first reschedule or stop timer */
262	if (w->repeat)	665	if (w->repeat)
263	{	666	{
264	if (w->is_abs)	667	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
265	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
266	else
267	w->at = ev_now + w->repeat;	668	w->at = now + w->repeat;
268		669	downheap ((WT *)timers, timercnt, 0);
269	downheap (0);
270	}	670	}
271	else	671	else
272	evtimer_stop (w); /* nonrepeating: stop timer */	672	ev_timer_stop (w); /* nonrepeating: stop timer */
273		673
274	event ((struct ev_watcher *)w, EV_TIMEOUT);	674	event ((W)w, EV_TIMEOUT);
		675	}
		676	}
		677
		678	static void
		679	periodics_reify (void)
		680	{
		681	while (periodiccnt && periodics [0]->at <= ev_now)
		682	{
		683	struct ev_periodic *w = periodics [0];
		684
		685	/* first reschedule or stop timer */
		686	if (w->interval)
		687	{
		688	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		689	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));
		690	downheap ((WT *)periodics, periodiccnt, 0);
		691	}
		692	else
		693	ev_periodic_stop (w); /* nonrepeating: stop timer */
		694
		695	event ((W)w, EV_PERIODIC);
		696	}
		697	}
		698
		699	static void
		700	periodics_reschedule (ev_tstamp diff)
		701	{
		702	int i;
		703
		704	/* adjust periodics after time jump */
		705	for (i = 0; i < periodiccnt; ++i)
		706	{
		707	struct ev_periodic *w = periodics [i];
		708
		709	if (w->interval)
		710	{
		711	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		712
		713	if (fabs (diff) >= 1e-4)
		714	{
		715	ev_periodic_stop (w);
		716	ev_periodic_start (w);
		717
		718	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		719	}
		720	}
		721	}
		722	}
		723
		724	static int
		725	time_update_monotonic (void)
		726	{
		727	now = get_clock ();
		728
		729	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
		730	{
		731	ev_now = now + diff;
		732	return 0;
		733	}
		734	else
		735	{
		736	now_floor = now;
		737	ev_now = ev_time ();
		738	return 1;
		739	}
		740	}
		741
		742	static void
		743	time_update (void)
		744	{
		745	int i;
		746
		747	#if EV_USE_MONOTONIC
		748	if (expect_true (have_monotonic))
		749	{
		750	if (time_update_monotonic ())
		751	{
		752	ev_tstamp odiff = diff;
		753
		754	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		755	{
		756	diff = ev_now - now;
		757
		758	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		759	return; /* all is well */
		760
		761	ev_now = ev_time ();
		762	now = get_clock ();
		763	now_floor = now;
		764	}
		765
		766	periodics_reschedule (diff - odiff);
		767	/* no timer adjustment, as the monotonic clock doesn't jump */
		768	}
		769	}
		770	else
		771	#endif
		772	{
		773	ev_now = ev_time ();
		774
		775	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		776	{
		777	periodics_reschedule (ev_now - now);
		778
		779	/* adjust timers. this is easy, as the offset is the same for all */
		780	for (i = 0; i < timercnt; ++i)
		781	timers [i]->at += diff;
		782	}
		783
		784	now = ev_now;
275	}	785	}
276	}	786	}
277		787
278	int ev_loop_done;	788	int ev_loop_done;
279		789
280	int ev_loop (int flags)	790	void ev_loop (int flags)
281	{	791	{
282	double block;	792	double block;
283	ev_loop_done = flags & EVLOOP_ONESHOT;	793	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
284		794
285	do	795	do
286	{	796	{
		797	/* queue check watchers (and execute them) */
		798	if (expect_false (preparecnt))
		799	{
		800	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		801	call_pending ();
		802	}
		803
287	/* update fd-related kernel structures */	804	/* update fd-related kernel structures */
288	method_reify (); fdchangecnt = 0;	805	fd_reify ();
289		806
290	/* calculate blocking time */	807	/* calculate blocking time */
		808
		809	/* we only need this for !monotonic clockor timers, but as we basically
		810	always have timers, we just calculate it always */
		811	#if EV_USE_MONOTONIC
		812	if (expect_true (have_monotonic))
		813	time_update_monotonic ();
		814	else
		815	#endif
		816	{
291	ev_now = ev_time ();	817	ev_now = ev_time ();
		818	now = ev_now;
		819	}
292		820
293	if (flags & EVLOOP_NONBLOCK)	821	if (flags & EVLOOP_NONBLOCK || idlecnt)
294	block = 0.;	822	block = 0.;
295	else if (!timercnt)
296	block = MAX_BLOCKTIME;
297	else	823	else
298	{	824	{
		825	block = MAX_BLOCKTIME;
		826
		827	if (timercnt)
		828	{
299	block = timers [0]->at - ev_now + method_fudge;	829	ev_tstamp to = timers [0]->at - now + method_fudge;
		830	if (block > to) block = to;
		831	}
		832
		833	if (periodiccnt)
		834	{
		835	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
		836	if (block > to) block = to;
		837	}
		838
300	if (block < 0.) block = 0.;	839	if (block < 0.) block = 0.;
301	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
302	}	840	}
303		841
304	method_poll (block);	842	method_poll (block);
305		843
		844	/* update ev_now, do magic */
		845	time_update ();
		846
306	/* put pending timers into pendign queue and reschedule them */	847	/* queue pending timers and reschedule them */
307	timer_reify ();	848	timers_reify (); /* relative timers called last */
		849	periodics_reify (); /* absolute timers called first */
308		850
309	ev_now = ev_time ();	851	/* queue idle watchers unless io or timers are pending */
		852	if (!pendingcnt)
		853	queue_events ((W *)idles, idlecnt, EV_IDLE);
		854
		855	/* queue check watchers, to be executed first */
		856	if (checkcnt)
		857	queue_events ((W *)checks, checkcnt, EV_CHECK);
		858
310	call_pending ();	859	call_pending ();
311	}	860	}
312	while (!ev_loop_done);	861	while (!ev_loop_done);
313	}
314		862
		863	if (ev_loop_done != 2)
		864	ev_loop_done = 0;
		865	}
		866
		867	/*****************************************************************************/
		868
315	static void	869	static void
316	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	870	wlist_add (WL *head, WL elem)
317	{	871	{
318	elem->next = *head;	872	elem->next = *head;
319	*head = elem;	873	*head = elem;
320	}	874	}
321		875
322	static void	876	static void
323	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	877	wlist_del (WL *head, WL elem)
324	{	878	{
325	while (*head)	879	while (*head)
326	{	880	{
327	if (*head == elem)	881	if (*head == elem)
328	{	882	{
…		…
333	head = &(*head)->next;	887	head = &(*head)->next;
334	}	888	}
335	}	889	}
336		890
337	static void	891	static void
338	ev_start (struct ev_watcher *w, int active)	892	ev_clear_pending (W w)
339	{	893	{
		894	if (w->pending)
		895	{
		896	pendings [ABSPRI (w)][w->pending - 1].w = 0;
340	w->pending = 0;	897	w->pending = 0;
		898	}
		899	}
		900
		901	static void
		902	ev_start (W w, int active)
		903	{
		904	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		905	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		906
341	w->active = active;	907	w->active = active;
342	}	908	}
343		909
344	static void	910	static void
345	ev_stop (struct ev_watcher *w)	911	ev_stop (W w)
346	{	912	{
347	if (w->pending)
348	pendings [w->pending - 1].w = 0;
349
350	w->active = 0;	913	w->active = 0;
351	/* nop */
352	}	914	}
353		915
		916	/*****************************************************************************/
		917
354	void	918	void
355	evio_start (struct ev_io *w)	919	ev_io_start (struct ev_io *w)
356	{	920	{
		921	int fd = w->fd;
		922
357	if (ev_is_active (w))	923	if (ev_is_active (w))
358	return;	924	return;
359		925
360	int fd = w->fd;	926	assert (("ev_io_start called with negative fd", fd >= 0));
361		927
362	ev_start ((struct ev_watcher *)w, 1);	928	ev_start ((W)w, 1);
363	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	929	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
364	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	930	wlist_add ((WL *)&anfds[fd].head, (WL)w);
365		931
366	++fdchangecnt;	932	fd_change (fd);
367	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
368	fdchanges [fdchangecnt - 1] = fd;
369	}	933	}
370		934
371	void	935	void
372	evio_stop (struct ev_io *w)	936	ev_io_stop (struct ev_io *w)
373	{	937	{
		938	ev_clear_pending ((W)w);
374	if (!ev_is_active (w))	939	if (!ev_is_active (w))
375	return;	940	return;
376		941
377	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	942	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
378	ev_stop ((struct ev_watcher *)w);	943	ev_stop ((W)w);
379		944
380	++fdchangecnt;	945	fd_change (w->fd);
381	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
382	fdchanges [fdchangecnt - 1] = w->fd;
383	}	946	}
384		947
385	void	948	void
386	evtimer_start (struct ev_timer *w)	949	ev_timer_start (struct ev_timer *w)
387	{	950	{
388	if (ev_is_active (w))	951	if (ev_is_active (w))
389	return;	952	return;
390		953
391	if (w->is_abs)
392	{
393	/* this formula differs from the one in timer_reify becuse we do not round up */
394	if (w->repeat)
395	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
396	}
397	else
398	w->at += ev_now;	954	w->at += now;
399		955
400	ev_start ((struct ev_watcher *)w, ++timercnt);	956	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		957
		958	ev_start ((W)w, ++timercnt);
401	array_needsize (timers, timermax, timercnt, );	959	array_needsize (timers, timermax, timercnt, );
402	timers [timercnt - 1] = w;	960	timers [timercnt - 1] = w;
403	upheap (timercnt - 1);	961	upheap ((WT *)timers, timercnt - 1);
404	}	962	}
405		963
406	void	964	void
407	evtimer_stop (struct ev_timer *w)	965	ev_timer_stop (struct ev_timer *w)
408	{	966	{
		967	ev_clear_pending ((W)w);
409	if (!ev_is_active (w))	968	if (!ev_is_active (w))
410	return;	969	return;
411		970
412	if (w->active < timercnt--)	971	if (w->active < timercnt--)
413	{	972	{
414	timers [w->active - 1] = timers [timercnt];	973	timers [w->active - 1] = timers [timercnt];
415	downheap (w->active - 1);	974	downheap ((WT *)timers, timercnt, w->active - 1);
416	}	975	}
417		976
418	ev_stop ((struct ev_watcher *)w);	977	w->at = w->repeat;
419	}
420		978
		979	ev_stop ((W)w);
		980	}
		981
421	void	982	void
422	evsignal_start (struct ev_signal *w)	983	ev_timer_again (struct ev_timer *w)
423	{	984	{
424	if (ev_is_active (w))	985	if (ev_is_active (w))
425	return;	986	{
		987	if (w->repeat)
		988	{
		989	w->at = now + w->repeat;
		990	downheap ((WT *)timers, timercnt, w->active - 1);
		991	}
		992	else
		993	ev_timer_stop (w);
		994	}
		995	else if (w->repeat)
		996	ev_timer_start (w);
		997	}
426		998
427	ev_start ((struct ev_watcher *)w, 1);	999	void
		1000	ev_periodic_start (struct ev_periodic *w)
		1001	{
		1002	if (ev_is_active (w))
		1003	return;
		1004
		1005	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1006
		1007	/* this formula differs from the one in periodic_reify because we do not always round up */
		1008	if (w->interval)
		1009	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
		1010
		1011	ev_start ((W)w, ++periodiccnt);
		1012	array_needsize (periodics, periodicmax, periodiccnt, );
		1013	periodics [periodiccnt - 1] = w;
		1014	upheap ((WT *)periodics, periodiccnt - 1);
		1015	}
		1016
		1017	void
		1018	ev_periodic_stop (struct ev_periodic *w)
		1019	{
		1020	ev_clear_pending ((W)w);
		1021	if (!ev_is_active (w))
		1022	return;
		1023
		1024	if (w->active < periodiccnt--)
		1025	{
		1026	periodics [w->active - 1] = periodics [periodiccnt];
		1027	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		1028	}
		1029
		1030	ev_stop ((W)w);
		1031	}
		1032
		1033	#ifndef SA_RESTART
		1034	# define SA_RESTART 0
		1035	#endif
		1036
		1037	void
		1038	ev_signal_start (struct ev_signal *w)
		1039	{
		1040	if (ev_is_active (w))
		1041	return;
		1042
		1043	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1044
		1045	ev_start ((W)w, 1);
428	array_needsize (signals, signalmax, w->signum, signals_init);	1046	array_needsize (signals, signalmax, w->signum, signals_init);
429	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1047	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
430	}
431		1048
		1049	if (!w->next)
		1050	{
		1051	struct sigaction sa;
		1052	sa.sa_handler = sighandler;
		1053	sigfillset (&sa.sa_mask);
		1054	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1055	sigaction (w->signum, &sa, 0);
		1056	}
		1057	}
		1058
432	void	1059	void
433	evsignal_stop (struct ev_signal *w)	1060	ev_signal_stop (struct ev_signal *w)
434	{	1061	{
		1062	ev_clear_pending ((W)w);
435	if (!ev_is_active (w))	1063	if (!ev_is_active (w))
436	return;	1064	return;
437		1065
438	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1066	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1067	ev_stop ((W)w);
		1068
		1069	if (!signals [w->signum - 1].head)
		1070	signal (w->signum, SIG_DFL);
		1071	}
		1072
		1073	void
		1074	ev_idle_start (struct ev_idle *w)
		1075	{
		1076	if (ev_is_active (w))
		1077	return;
		1078
		1079	ev_start ((W)w, ++idlecnt);
		1080	array_needsize (idles, idlemax, idlecnt, );
		1081	idles [idlecnt - 1] = w;
		1082	}
		1083
		1084	void
		1085	ev_idle_stop (struct ev_idle *w)
		1086	{
		1087	ev_clear_pending ((W)w);
		1088	if (ev_is_active (w))
		1089	return;
		1090
		1091	idles [w->active - 1] = idles [--idlecnt];
		1092	ev_stop ((W)w);
		1093	}
		1094
		1095	void
		1096	ev_prepare_start (struct ev_prepare *w)
		1097	{
		1098	if (ev_is_active (w))
		1099	return;
		1100
		1101	ev_start ((W)w, ++preparecnt);
		1102	array_needsize (prepares, preparemax, preparecnt, );
		1103	prepares [preparecnt - 1] = w;
		1104	}
		1105
		1106	void
		1107	ev_prepare_stop (struct ev_prepare *w)
		1108	{
		1109	ev_clear_pending ((W)w);
		1110	if (ev_is_active (w))
		1111	return;
		1112
		1113	prepares [w->active - 1] = prepares [--preparecnt];
		1114	ev_stop ((W)w);
		1115	}
		1116
		1117	void
		1118	ev_check_start (struct ev_check *w)
		1119	{
		1120	if (ev_is_active (w))
		1121	return;
		1122
		1123	ev_start ((W)w, ++checkcnt);
		1124	array_needsize (checks, checkmax, checkcnt, );
		1125	checks [checkcnt - 1] = w;
		1126	}
		1127
		1128	void
439	ev_stop ((struct ev_watcher *)w);	1129	ev_check_stop (struct ev_check *w)
		1130	{
		1131	ev_clear_pending ((W)w);
		1132	if (ev_is_active (w))
		1133	return;
		1134
		1135	checks [w->active - 1] = checks [--checkcnt];
		1136	ev_stop ((W)w);
		1137	}
		1138
		1139	void
		1140	ev_child_start (struct ev_child *w)
		1141	{
		1142	if (ev_is_active (w))
		1143	return;
		1144
		1145	ev_start ((W)w, 1);
		1146	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1147	}
		1148
		1149	void
		1150	ev_child_stop (struct ev_child *w)
		1151	{
		1152	ev_clear_pending ((W)w);
		1153	if (ev_is_active (w))
		1154	return;
		1155
		1156	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1157	ev_stop ((W)w);
440	}	1158	}
441		1159
442	/*****************************************************************************/	1160	/*****************************************************************************/
		1161
		1162	struct ev_once
		1163	{
		1164	struct ev_io io;
		1165	struct ev_timer to;
		1166	void (*cb)(int revents, void *arg);
		1167	void *arg;
		1168	};
		1169
		1170	static void
		1171	once_cb (struct ev_once *once, int revents)
		1172	{
		1173	void (*cb)(int revents, void *arg) = once->cb;
		1174	void *arg = once->arg;
		1175
		1176	ev_io_stop (&once->io);
		1177	ev_timer_stop (&once->to);
		1178	free (once);
		1179
		1180	cb (revents, arg);
		1181	}
		1182
		1183	static void
		1184	once_cb_io (struct ev_io *w, int revents)
		1185	{
		1186	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1187	}
		1188
		1189	static void
		1190	once_cb_to (struct ev_timer *w, int revents)
		1191	{
		1192	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1193	}
		1194
		1195	void
		1196	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1197	{
		1198	struct ev_once *once = malloc (sizeof (struct ev_once));
		1199
		1200	if (!once)
		1201	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1202	else
		1203	{
		1204	once->cb = cb;
		1205	once->arg = arg;
		1206
		1207	ev_watcher_init (&once->io, once_cb_io);
		1208	if (fd >= 0)
		1209	{
		1210	ev_io_set (&once->io, fd, events);
		1211	ev_io_start (&once->io);
		1212	}
		1213
		1214	ev_watcher_init (&once->to, once_cb_to);
		1215	if (timeout >= 0.)
		1216	{
		1217	ev_timer_set (&once->to, timeout, 0.);
		1218	ev_timer_start (&once->to);
		1219	}
		1220	}
		1221	}
		1222
		1223	/*****************************************************************************/
		1224
443	#if 1	1225	#if 0
		1226
		1227	struct ev_io wio;
444		1228
445	static void	1229	static void
446	sin_cb (struct ev_io *w, int revents)	1230	sin_cb (struct ev_io *w, int revents)
447	{	1231	{
448	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1232	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
449	}	1233	}
450		1234
451	static void	1235	static void
452	ocb (struct ev_timer *w, int revents)	1236	ocb (struct ev_timer *w, int revents)
453	{	1237	{
454	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1238	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
		1239	ev_timer_stop (w);
		1240	ev_timer_start (w);
		1241	}
		1242
		1243	static void
		1244	scb (struct ev_signal *w, int revents)
		1245	{
		1246	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1247	ev_io_stop (&wio);
		1248	ev_io_start (&wio);
		1249	}
		1250
		1251	static void
		1252	gcb (struct ev_signal *w, int revents)
		1253	{
		1254	fprintf (stderr, "generic %x\n", revents);
		1255
455	}	1256	}
456		1257
457	int main (void)	1258	int main (void)
458	{	1259	{
459	struct ev_io sin;
460
461	ev_init (0);	1260	ev_init (0);
462		1261
463	evw_init (&sin, sin_cb, 55);
464	evio_set (&sin, 0, EV_READ);	1262	ev_io_init (&wio, sin_cb, 0, EV_READ);
465	evio_start (&sin);	1263	ev_io_start (&wio);
466		1264
467	struct ev_timer t[1000];	1265	struct ev_timer t[10000];
468		1266
		1267	#if 0
469	int i;	1268	int i;
470	for (i = 0; i < 1000; ++i)	1269	for (i = 0; i < 10000; ++i)
471	{	1270	{
472	struct ev_timer *w = t + i;	1271	struct ev_timer *w = t + i;
473	evw_init (w, ocb, i);	1272	ev_watcher_init (w, ocb, i);
474	evtimer_set_rel (w, drand48 (), 0);	1273	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
475	evtimer_start (w);	1274	ev_timer_start (w);
476	if (drand48 () < 0.5)	1275	if (drand48 () < 0.5)
477	evtimer_stop (w);	1276	ev_timer_stop (w);
478	}	1277	}
		1278	#endif
		1279
		1280	struct ev_timer t1;
		1281	ev_timer_init (&t1, ocb, 5, 10);
		1282	ev_timer_start (&t1);
		1283
		1284	struct ev_signal sig;
		1285	ev_signal_init (&sig, scb, SIGQUIT);
		1286	ev_signal_start (&sig);
		1287
		1288	struct ev_check cw;
		1289	ev_check_init (&cw, gcb);
		1290	ev_check_start (&cw);
		1291
		1292	struct ev_idle iw;
		1293	ev_idle_init (&iw, gcb);
		1294	ev_idle_start (&iw);
479		1295
480	ev_loop (0);	1296	ev_loop (0);
481		1297
482	return 0;	1298	return 0;
483	}	1299	}

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