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Comparing libev/ev.c (file contents):
Revision 1.6 by root, Tue Oct 30 23:55:29 2007 UTC vs.
Revision 1.53 by root, Sat Nov 3 22:31:11 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
6	#include <assert.h>	44	#include <assert.h>
7	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
8	#include <sys/time.h>	50	#include <sys/time.h>
9	#include <time.h>	51	#include <time.h>
10		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
11	#ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
12	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
13	#endif	84	#endif
14		85
		86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
15	#define HAVE_REALTIME 1	88	# define EV_USE_REALTIME 0
16	#define HAVE_EPOLL 1	89	#endif
17	#define HAVE_SELECT 1	90
		91	/**/
18		92
19	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
20	#define MAX_BLOCKTIME 60.	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 */
21		97
22	#include "ev.h"	98	#include "ev.h"
23		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
24	struct ev_watcher {	114	typedef struct ev_watcher *W;
25	EV_WATCHER (ev_watcher);	115	typedef struct ev_watcher_list *WL;
		116	typedef struct ev_watcher_time *WT;
		117
		118	/*****************************************************************************/
		119
		120	typedef struct
		121	{
		122	struct ev_watcher_list *head;
		123	unsigned char events;
		124	unsigned char reify;
		125	} ANFD;
		126
		127	typedef struct
		128	{
		129	W w;
		130	int events;
		131	} ANPENDING;
		132
		133	#ifdef EV_MULTIPLICITY
		134	struct ev_loop
		135	{
		136	# define VAR(name,decl) decl
		137	# include "ev_vars.h"
26	};	138	};
		139	#else
		140	# define VAR(name,decl) static decl
		141	# include "ev_vars.h"
		142	#endif
		143	#undef VAR
27		144
28	struct ev_watcher_list {	145	/*****************************************************************************/
29	EV_WATCHER_LIST (ev_watcher_list);
30	};
31		146
32	static ev_tstamp now, diff; /* monotonic clock */	147	inline ev_tstamp
33	ev_tstamp ev_now;
34	int ev_method;
35
36	static int have_monotonic; /* runtime */
37
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
39	static void (*method_modify)(int fd, int oev, int nev);
40	static void (*method_poll)(ev_tstamp timeout);
41
42	ev_tstamp
43	ev_time (void)	148	ev_time (void)
44	{	149	{
45	#if HAVE_REALTIME	150	#if EV_USE_REALTIME
46	struct timespec ts;	151	struct timespec ts;
47	clock_gettime (CLOCK_REALTIME, &ts);	152	clock_gettime (CLOCK_REALTIME, &ts);
48	return ts.tv_sec + ts.tv_nsec * 1e-9;	153	return ts.tv_sec + ts.tv_nsec * 1e-9;
49	#else	154	#else
50	struct timeval tv;	155	struct timeval tv;
51	gettimeofday (&tv, 0);	156	gettimeofday (&tv, 0);
52	return tv.tv_sec + tv.tv_usec * 1e-6;	157	return tv.tv_sec + tv.tv_usec * 1e-6;
53	#endif	158	#endif
54	}	159	}
55		160
56	static ev_tstamp	161	inline ev_tstamp
57	get_clock (void)	162	get_clock (void)
58	{	163	{
59	#if HAVE_MONOTONIC	164	#if EV_USE_MONOTONIC
60	if (have_monotonic)	165	if (expect_true (have_monotonic))
61	{	166	{
62	struct timespec ts;	167	struct timespec ts;
63	clock_gettime (CLOCK_MONOTONIC, &ts);	168	clock_gettime (CLOCK_MONOTONIC, &ts);
64	return ts.tv_sec + ts.tv_nsec * 1e-9;	169	return ts.tv_sec + ts.tv_nsec * 1e-9;
65	}	170	}
66	#endif	171	#endif
67		172
68	return ev_time ();	173	return ev_time ();
69	}	174	}
70		175
		176	ev_tstamp
		177	ev_now (EV_P)
		178	{
		179	return rt_now;
		180	}
		181
		182	#define array_roundsize(base,n) ((n) | 4 & ~3)
		183
71	#define array_needsize(base,cur,cnt,init) \	184	#define array_needsize(base,cur,cnt,init) \
72	if ((cnt) > cur) \	185	if (expect_false ((cnt) > cur)) \
73	{ \	186	{ \
74	int newcnt = cur ? cur << 1 : 16; \	187	int newcnt = cur; \
75	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	188	do \
		189	{ \
		190	newcnt = array_roundsize (base, newcnt << 1); \
		191	} \
		192	while ((cnt) > newcnt); \
		193	\
76	base = realloc (base, sizeof (*base) * (newcnt)); \	194	base = realloc (base, sizeof (*base) * (newcnt)); \
77	init (base + cur, newcnt - cur); \	195	init (base + cur, newcnt - cur); \
78	cur = newcnt; \	196	cur = newcnt; \
79	}	197	}
80		198
81	typedef struct	199	/*****************************************************************************/
82	{
83	struct ev_io *head;
84	unsigned char wev, rev; /* want, received event set */
85	} ANFD;
86
87	static ANFD *anfds;
88	static int anfdmax;
89
90	static int *fdchanges;
91	static int fdchangemax, fdchangecnt;
92		200
93	static void	201	static void
94	anfds_init (ANFD *base, int count)	202	anfds_init (ANFD *base, int count)
95	{	203	{
96	while (count--)	204	while (count--)
97	{	205	{
98	base->head = 0;	206	base->head = 0;
99	base->wev = base->rev = EV_NONE;	207	base->events = EV_NONE;
		208	base->reify = 0;
		209
100	++base;	210	++base;
101	}	211	}
102	}	212	}
103		213
104	typedef struct
105	{
106	struct ev_watcher *w;
107	int events;
108	} ANPENDING;
109
110	static ANPENDING *pendings;
111	static int pendingmax, pendingcnt;
112
113	static void	214	static void
114	event (struct ev_watcher *w, int events)	215	event (EV_P_ W w, int events)
115	{	216	{
		217	if (w->pending)
		218	{
		219	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		220	return;
		221	}
		222
116	w->pending = ++pendingcnt;	223	w->pending = ++pendingcnt [ABSPRI (w)];
117	array_needsize (pendings, pendingmax, pendingcnt, );	224	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
118	pendings [pendingcnt - 1].w = w;	225	pendings [ABSPRI (w)][w->pending - 1].w = w;
119	pendings [pendingcnt - 1].events = events;	226	pendings [ABSPRI (w)][w->pending - 1].events = events;
120	}	227	}
121		228
122	static void	229	static void
		230	queue_events (EV_P_ W *events, int eventcnt, int type)
		231	{
		232	int i;
		233
		234	for (i = 0; i < eventcnt; ++i)
		235	event (EV_A_ events [i], type);
		236	}
		237
		238	static void
123	fd_event (int fd, int events)	239	fd_event (EV_P_ int fd, int events)
124	{	240	{
125	ANFD *anfd = anfds + fd;	241	ANFD *anfd = anfds + fd;
126	struct ev_io *w;	242	struct ev_io *w;
127		243
128	for (w = anfd->head; w; w = w->next)	244	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
129	{	245	{
130	int ev = w->events & events;	246	int ev = w->events & events;
131		247
132	if (ev)	248	if (ev)
133	event ((struct ev_watcher *)w, ev);	249	event (EV_A_ (W)w, ev);
		250	}
		251	}
		252
		253	/*****************************************************************************/
		254
		255	static void
		256	fd_reify (EV_P)
		257	{
		258	int i;
		259
		260	for (i = 0; i < fdchangecnt; ++i)
		261	{
		262	int fd = fdchanges [i];
		263	ANFD *anfd = anfds + fd;
		264	struct ev_io *w;
		265
		266	int events = 0;
		267
		268	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		269	events |= w->events;
		270
		271	anfd->reify = 0;
		272
		273	if (anfd->events != events)
		274	{
		275	method_modify (EV_A_ fd, anfd->events, events);
		276	anfd->events = events;
		277	}
		278	}
		279
		280	fdchangecnt = 0;
		281	}
		282
		283	static void
		284	fd_change (EV_P_ int fd)
		285	{
		286	if (anfds [fd].reify || fdchangecnt < 0)
		287	return;
		288
		289	anfds [fd].reify = 1;
		290
		291	++fdchangecnt;
		292	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		293	fdchanges [fdchangecnt - 1] = fd;
		294	}
		295
		296	static void
		297	fd_kill (EV_P_ int fd)
		298	{
		299	struct ev_io *w;
		300
		301	while ((w = (struct ev_io *)anfds [fd].head))
		302	{
		303	ev_io_stop (EV_A_ w);
		304	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		305	}
		306	}
		307
		308	/* called on EBADF to verify fds */
		309	static void
		310	fd_ebadf (EV_P)
		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 (EV_A_ fd);
		318	}
		319
		320	/* called on ENOMEM in select/poll to kill some fds and retry */
		321	static void
		322	fd_enomem (EV_P)
		323	{
		324	int fd = anfdmax;
		325
		326	while (fd--)
		327	if (anfds [fd].events)
		328	{
		329	close (fd);
		330	fd_kill (EV_A_ fd);
		331	return;
134	}	332	}
135	}	333	}
136		334
137	static struct ev_timer **atimers;	335	/*****************************************************************************/
138	static int atimermax, atimercnt;
139		336
140	static struct ev_timer **rtimers;
141	static int rtimermax, rtimercnt;
142
143	static void	337	static void
144	upheap (struct ev_timer **timers, int k)	338	upheap (WT *timers, int k)
145	{	339	{
146	struct ev_timer *w = timers [k];	340	WT w = timers [k];
147		341
148	while (k && timers [k >> 1]->at > w->at)	342	while (k && timers [k >> 1]->at > w->at)
149	{	343	{
150	timers [k] = timers [k >> 1];	344	timers [k] = timers [k >> 1];
151	timers [k]->active = k + 1;	345	timers [k]->active = k + 1;
…		…
156	timers [k]->active = k + 1;	350	timers [k]->active = k + 1;
157		351
158	}	352	}
159		353
160	static void	354	static void
161	downheap (struct ev_timer **timers, int N, int k)	355	downheap (WT *timers, int N, int k)
162	{	356	{
163	struct ev_timer *w = timers [k];	357	WT w = timers [k];
164		358
165	while (k < (N >> 1))	359	while (k < (N >> 1))
166	{	360	{
167	int j = k << 1;	361	int j = k << 1;
168		362
…		…
179		373
180	timers [k] = w;	374	timers [k] = w;
181	timers [k]->active = k + 1;	375	timers [k]->active = k + 1;
182	}	376	}
183		377
184	static struct ev_signal **signals;	378	/*****************************************************************************/
		379
		380	typedef struct
		381	{
		382	struct ev_watcher_list *head;
		383	sig_atomic_t volatile gotsig;
		384	} ANSIG;
		385
		386	static ANSIG *signals;
185	static int signalmax;	387	static int signalmax;
186		388
		389	static int sigpipe [2];
		390	static sig_atomic_t volatile gotsig;
		391
187	static void	392	static void
188	signals_init (struct ev_signal **base, int count)	393	signals_init (ANSIG *base, int count)
189	{	394	{
190	while (count--)	395	while (count--)
191	*base++ = 0;	396	{
192	}	397	base->head = 0;
		398	base->gotsig = 0;
193		399
		400	++base;
		401	}
		402	}
		403
		404	static void
		405	sighandler (int signum)
		406	{
		407	signals [signum - 1].gotsig = 1;
		408
		409	if (!gotsig)
		410	{
		411	int old_errno = errno;
		412	gotsig = 1;
		413	write (sigpipe [1], &signum, 1);
		414	errno = old_errno;
		415	}
		416	}
		417
		418	static void
		419	sigcb (EV_P_ struct ev_io *iow, int revents)
		420	{
		421	struct ev_watcher_list *w;
		422	int signum;
		423
		424	read (sigpipe [0], &revents, 1);
		425	gotsig = 0;
		426
		427	for (signum = signalmax; signum--; )
		428	if (signals [signum].gotsig)
		429	{
		430	signals [signum].gotsig = 0;
		431
		432	for (w = signals [signum].head; w; w = w->next)
		433	event (EV_A_ (W)w, EV_SIGNAL);
		434	}
		435	}
		436
		437	static void
		438	siginit (EV_P)
		439	{
		440	#ifndef WIN32
		441	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		442	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		443
		444	/* rather than sort out wether we really need nb, set it */
		445	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		446	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		447	#endif
		448
		449	ev_io_set (&sigev, sigpipe [0], EV_READ);
		450	ev_io_start (&sigev);
		451	ev_unref (EV_A); /* child watcher should not keep loop alive */
		452	}
		453
		454	/*****************************************************************************/
		455
		456	#ifndef WIN32
		457
		458	#ifndef WCONTINUED
		459	# define WCONTINUED 0
		460	#endif
		461
		462	static void
		463	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		464	{
		465	struct ev_child *w;
		466
		467	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		468	if (w->pid == pid || !w->pid)
		469	{
		470	w->priority = sw->priority; /* need to do it *now* */
		471	w->rpid = pid;
		472	w->rstatus = status;
		473	event (EV_A_ (W)w, EV_CHILD);
		474	}
		475	}
		476
		477	static void
		478	childcb (EV_P_ struct ev_signal *sw, int revents)
		479	{
		480	int pid, status;
		481
		482	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		483	{
		484	/* make sure we are called again until all childs have been reaped */
		485	event (EV_A_ (W)sw, EV_SIGNAL);
		486
		487	child_reap (EV_A_ sw, pid, pid, status);
		488	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		489	}
		490	}
		491
		492	#endif
		493
		494	/*****************************************************************************/
		495
		496	#if EV_USE_KQUEUE
		497	# include "ev_kqueue.c"
		498	#endif
194	#if HAVE_EPOLL	499	#if EV_USE_EPOLL
195	# include "ev_epoll.c"	500	# include "ev_epoll.c"
196	#endif	501	#endif
		502	#if EV_USEV_POLL
		503	# include "ev_poll.c"
		504	#endif
197	#if HAVE_SELECT	505	#if EV_USE_SELECT
198	# include "ev_select.c"	506	# include "ev_select.c"
199	#endif	507	#endif
200		508
201	int ev_init (int flags)	509	int
		510	ev_version_major (void)
202	{	511	{
		512	return EV_VERSION_MAJOR;
		513	}
		514
		515	int
		516	ev_version_minor (void)
		517	{
		518	return EV_VERSION_MINOR;
		519	}
		520
		521	/* return true if we are running with elevated privileges and should ignore env variables */
		522	static int
		523	enable_secure (void)
		524	{
		525	#ifdef WIN32
		526	return 0;
		527	#else
		528	return getuid () != geteuid ()
		529	|| getgid () != getegid ();
		530	#endif
		531	}
		532
		533	int
		534	ev_method (EV_P)
		535	{
		536	return method;
		537	}
		538
		539	int
		540	ev_init (EV_P_ int methods)
		541	{
		542	#ifdef EV_MULTIPLICITY
		543	memset (loop, 0, sizeof (struct ev_loop));
		544	#endif
		545
		546	if (!method)
		547	{
203	#if HAVE_MONOTONIC	548	#if EV_USE_MONOTONIC
204	{	549	{
205	struct timespec ts;	550	struct timespec ts;
206	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	551	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
207	have_monotonic = 1;	552	have_monotonic = 1;
208	}	553	}
209	#endif	554	#endif
210		555
211	ev_now = ev_time ();	556	rt_now = ev_time ();
212	now = get_clock ();	557	mn_now = get_clock ();
		558	now_floor = mn_now;
213	diff = ev_now - now;	559	diff = rt_now - mn_now;
214		560
		561	if (pipe (sigpipe))
		562	return 0;
		563
		564	if (methods == EVMETHOD_AUTO)
		565	if (!enable_secure () && getenv ("LIBmethodS"))
		566	methods = atoi (getenv ("LIBmethodS"));
		567	else
		568	methods = EVMETHOD_ANY;
		569
		570	method = 0;
		571	#if EV_USE_KQUEUE
		572	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		573	#endif
215	#if HAVE_EPOLL	574	#if EV_USE_EPOLL
216	if (epoll_init (flags))	575	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
217	return ev_method;
218	#endif	576	#endif
		577	#if EV_USEV_POLL
		578	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		579	#endif
219	#if HAVE_SELECT	580	#if EV_USE_SELECT
220	if (select_init (flags))	581	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
221	return ev_method;
222	#endif	582	#endif
223		583
224	ev_method = EVMETHOD_NONE;	584	if (method)
		585	{
		586	ev_watcher_init (&sigev, sigcb);
		587	ev_set_priority (&sigev, EV_MAXPRI);
		588	siginit (EV_A);
		589
		590	#ifndef WIN32
		591	ev_signal_init (&childev, childcb, SIGCHLD);
		592	ev_set_priority (&childev, EV_MAXPRI);
		593	ev_signal_start (EV_A_ &childev);
		594	ev_unref (EV_A); /* child watcher should not keep loop alive */
		595	#endif
		596	}
		597	}
		598
225	return ev_method;	599	return method;
226	}	600	}
227		601
228	void ev_prefork (void)	602	/*****************************************************************************/
229	{
230	}
231		603
		604	void
		605	ev_fork_prepare (void)
		606	{
		607	/* nop */
		608	}
		609
		610	void
232	void ev_postfork_parent (void)	611	ev_fork_parent (void)
233	{	612	{
		613	/* nop */
234	}	614	}
235		615
		616	void
236	void ev_postfork_child (void)	617	ev_fork_child (void)
237	{	618	{
238	#if HAVE_EPOLL	619	#if EV_USE_EPOLL
239	if (ev_method == EVMETHOD_EPOLL)	620	if (method == EVMETHOD_EPOLL)
240	epoll_postfork_child ();	621	epoll_postfork_child ();
241	#endif	622	#endif
242	}
243		623
		624	ev_io_stop (&sigev);
		625	close (sigpipe [0]);
		626	close (sigpipe [1]);
		627	pipe (sigpipe);
		628	siginit ();
		629	}
		630
		631	/*****************************************************************************/
		632
244	static void	633	static void
245	fd_reify (void)	634	call_pending (EV_P)
246	{	635	{
247	int i;	636	int pri;
248		637
249	for (i = 0; i < fdchangecnt; ++i)	638	for (pri = NUMPRI; pri--; )
250	{	639	while (pendingcnt [pri])
251	int fd = fdchanges [i];
252	ANFD *anfd = anfds + fd;
253	struct ev_io *w;
254
255	int wev = 0;
256
257	for (w = anfd->head; w; w = w->next)
258	wev |= w->events;
259
260	if (anfd->wev != wev)
261	{	640	{
262	method_modify (fd, anfd->wev, wev);	641	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
263	anfd->wev = wev;
264	}
265	}
266		642
267	fdchangecnt = 0;
268	}
269
270	static void
271	call_pending ()
272	{
273	int i;
274
275	for (i = 0; i < pendingcnt; ++i)
276	{
277	ANPENDING *p = pendings + i;
278
279	if (p->w)	643	if (p->w)
280	{	644	{
281	p->w->pending = 0;	645	p->w->pending = 0;
282	p->w->cb (p->w, p->events);	646	p->w->cb (EV_A_ p->w, p->events);
283	}	647	}
284	}	648	}
285
286	pendingcnt = 0;
287	}	649	}
288		650
289	static void	651	static void
290	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	652	timers_reify (EV_P)
291	{	653	{
292	while (timercnt && timers [0]->at <= now)	654	while (timercnt && timers [0]->at <= mn_now)
293	{	655	{
294	struct ev_timer *w = timers [0];	656	struct ev_timer *w = timers [0];
295		657
296	/* first reschedule or stop timer */	658	/* first reschedule or stop timer */
297	if (w->repeat)	659	if (w->repeat)
298	{	660	{
299	if (w->is_abs)	661	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
300	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
301	else
302	w->at = now + w->repeat;	662	w->at = mn_now + w->repeat;
303
304	assert (w->at > now);
305
306	downheap (timers, timercnt, 0);	663	downheap ((WT *)timers, timercnt, 0);
307	}	664	}
308	else	665	else
		666	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		667
		668	event ((W)w, EV_TIMEOUT);
		669	}
		670	}
		671
		672	static void
		673	periodics_reify (EV_P)
		674	{
		675	while (periodiccnt && periodics [0]->at <= rt_now)
		676	{
		677	struct ev_periodic *w = periodics [0];
		678
		679	/* first reschedule or stop timer */
		680	if (w->interval)
309	{	681	{
310	evtimer_stop (w); /* nonrepeating: stop timer */	682	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
311	--timercnt; /* maybe pass by reference instead? */	683	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		684	downheap ((WT *)periodics, periodiccnt, 0);
312	}	685	}
		686	else
		687	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
313		688
314	event ((struct ev_watcher *)w, EV_TIMEOUT);	689	event (EV_A_ (W)w, EV_PERIODIC);
315	}	690	}
316	}	691	}
317		692
318	static void	693	static void
319	time_update ()	694	periodics_reschedule (EV_P_ ev_tstamp diff)
320	{	695	{
321	int i;	696	int i;
322	ev_now = ev_time ();
323		697
324	if (have_monotonic)	698	/* adjust periodics after time jump */
		699	for (i = 0; i < periodiccnt; ++i)
325	{	700	{
326	ev_tstamp odiff = diff;	701	struct ev_periodic *w = periodics [i];
327		702
328	/* detecting time jumps is much more difficult */	703	if (w->interval)
329	for (i = 2; --i; ) /* loop a few times, before making important decisions */
330	{	704	{
331	now = get_clock ();	705	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
332	diff = ev_now - now;
333		706
334	if (fabs (odiff - diff) < MIN_TIMEJUMP)	707	if (fabs (diff) >= 1e-4)
335	return; /* all is well */	708	{
		709	ev_periodic_stop (EV_A_ w);
		710	ev_periodic_start (EV_A_ w);
336		711
337	ev_now = ev_time ();	712	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		713	}
338	}	714	}
		715	}
		716	}
339		717
340	/* time jump detected, reschedule atimers */	718	inline int
341	for (i = 0; i < atimercnt; ++i)	719	time_update_monotonic (EV_P)
		720	{
		721	mn_now = get_clock ();
		722
		723	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		724	{
		725	rt_now = mn_now + diff;
		726	return 0;
		727	}
		728	else
		729	{
		730	now_floor = mn_now;
		731	rt_now = ev_time ();
		732	return 1;
		733	}
		734	}
		735
		736	static void
		737	time_update (EV_P)
		738	{
		739	int i;
		740
		741	#if EV_USE_MONOTONIC
		742	if (expect_true (have_monotonic))
		743	{
		744	if (time_update_monotonic (EV_A))
342	{	745	{
343	struct ev_timer *w = atimers [i];	746	ev_tstamp odiff = diff;
344	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	747
		748	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		749	{
		750	diff = rt_now - mn_now;
		751
		752	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		753	return; /* all is well */
		754
		755	rt_now = ev_time ();
		756	mn_now = get_clock ();
		757	now_floor = mn_now;
		758	}
		759
		760	periodics_reschedule (EV_A_ diff - odiff);
		761	/* no timer adjustment, as the monotonic clock doesn't jump */
345	}	762	}
346	}	763	}
347	else	764	else
		765	#endif
348	{	766	{
349	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	767	rt_now = ev_time ();
350	/* time jump detected, adjust rtimers */	768
		769	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		770	{
		771	periodics_reschedule (EV_A_ rt_now - mn_now);
		772
		773	/* adjust timers. this is easy, as the offset is the same for all */
351	for (i = 0; i < rtimercnt; ++i)	774	for (i = 0; i < timercnt; ++i)
352	rtimers [i]->at += ev_now - now;	775	timers [i]->at += diff;
		776	}
353		777
354	now = ev_now;	778	mn_now = rt_now;
355	}	779	}
356	}	780	}
357		781
358	int ev_loop_done;	782	void
		783	ev_ref (EV_P)
		784	{
		785	++activecnt;
		786	}
359		787
		788	void
		789	ev_unref (EV_P)
		790	{
		791	--activecnt;
		792	}
		793
		794	static int loop_done;
		795
		796	void
360	void ev_loop (int flags)	797	ev_loop (EV_P_ int flags)
361	{	798	{
362	double block;	799	double block;
363	ev_loop_done = flags & EVLOOP_ONESHOT;	800	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
364		801
365	do	802	do
366	{	803	{
		804	/* queue check watchers (and execute them) */
		805	if (expect_false (preparecnt))
		806	{
		807	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		808	call_pending (EV_A);
		809	}
		810
367	/* update fd-related kernel structures */	811	/* update fd-related kernel structures */
368	fd_reify ();	812	fd_reify (EV_A);
369		813
370	/* calculate blocking time */	814	/* calculate blocking time */
		815
		816	/* we only need this for !monotonic clockor timers, but as we basically
		817	always have timers, we just calculate it always */
		818	#if EV_USE_MONOTONIC
		819	if (expect_true (have_monotonic))
		820	time_update_monotonic (EV_A);
		821	else
		822	#endif
		823	{
		824	rt_now = ev_time ();
		825	mn_now = rt_now;
		826	}
		827
371	if (flags & EVLOOP_NONBLOCK)	828	if (flags & EVLOOP_NONBLOCK || idlecnt)
372	block = 0.;	829	block = 0.;
373	else	830	else
374	{	831	{
375	block = MAX_BLOCKTIME;	832	block = MAX_BLOCKTIME;
376		833
377	if (rtimercnt)	834	if (timercnt)
378	{	835	{
379	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	836	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
380	if (block > to) block = to;	837	if (block > to) block = to;
381	}	838	}
382		839
383	if (atimercnt)	840	if (periodiccnt)
384	{	841	{
385	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	842	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
386	if (block > to) block = to;	843	if (block > to) block = to;
387	}	844	}
388		845
389	if (block < 0.) block = 0.;	846	if (block < 0.) block = 0.;
390	}	847	}
391		848
392	method_poll (block);	849	method_poll (EV_A_ block);
393		850
394	/* update ev_now, do magic */	851	/* update rt_now, do magic */
395	time_update ();	852	time_update (EV_A);
396		853
397	/* put pending timers into pendign queue and reschedule them */	854	/* queue pending timers and reschedule them */
398	/* absolute timers first */	855	timers_reify (EV_A); /* relative timers called last */
399	timers_reify (atimers, atimercnt, ev_now);	856	periodics_reify (EV_A); /* absolute timers called first */
400	/* relative timers second */
401	timers_reify (rtimers, rtimercnt, now);
402		857
		858	/* queue idle watchers unless io or timers are pending */
		859	if (!pendingcnt)
		860	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		861
		862	/* queue check watchers, to be executed first */
		863	if (checkcnt)
		864	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		865
403	call_pending ();	866	call_pending (EV_A);
404	}	867	}
405	while (!ev_loop_done);	868	while (activecnt && !loop_done);
406	}
407		869
408	static void	870	if (loop_done != 2)
409	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	871	loop_done = 0;
		872	}
		873
		874	void
		875	ev_unloop (EV_P_ int how)
		876	{
		877	loop_done = how;
		878	}
		879
		880	/*****************************************************************************/
		881
		882	inline void
		883	wlist_add (WL *head, WL elem)
410	{	884	{
411	elem->next = *head;	885	elem->next = *head;
412	*head = elem;	886	*head = elem;
413	}	887	}
414		888
415	static void	889	inline void
416	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	890	wlist_del (WL *head, WL elem)
417	{	891	{
418	while (*head)	892	while (*head)
419	{	893	{
420	if (*head == elem)	894	if (*head == elem)
421	{	895	{
…		…
425		899
426	head = &(*head)->next;	900	head = &(*head)->next;
427	}	901	}
428	}	902	}
429		903
430	static void	904	inline void
431	ev_start (struct ev_watcher *w, int active)	905	ev_clear_pending (EV_P_ W w)
432	{	906	{
		907	if (w->pending)
		908	{
		909	pendings [ABSPRI (w)][w->pending - 1].w = 0;
433	w->pending = 0;	910	w->pending = 0;
		911	}
		912	}
		913
		914	inline void
		915	ev_start (EV_P_ W w, int active)
		916	{
		917	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		918	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		919
434	w->active = active;	920	w->active = active;
		921	ev_ref (EV_A);
435	}	922	}
436		923
437	static void	924	inline void
438	ev_stop (struct ev_watcher *w)	925	ev_stop (EV_P_ W w)
439	{	926	{
440	if (w->pending)	927	ev_unref (EV_A);
441	pendings [w->pending - 1].w = 0;
442
443	w->active = 0;	928	w->active = 0;
444	/* nop */
445	}	929	}
446		930
		931	/*****************************************************************************/
		932
447	void	933	void
448	evio_start (struct ev_io *w)	934	ev_io_start (EV_P_ struct ev_io *w)
449	{	935	{
		936	int fd = w->fd;
		937
450	if (ev_is_active (w))	938	if (ev_is_active (w))
451	return;	939	return;
452		940
453	int fd = w->fd;	941	assert (("ev_io_start called with negative fd", fd >= 0));
454		942
455	ev_start ((struct ev_watcher *)w, 1);	943	ev_start (EV_A_ (W)w, 1);
456	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	944	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
457	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	945	wlist_add ((WL *)&anfds[fd].head, (WL)w);
458		946
459	++fdchangecnt;	947	fd_change (EV_A_ fd);
460	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
461	fdchanges [fdchangecnt - 1] = fd;
462	}	948	}
463		949
464	void	950	void
465	evio_stop (struct ev_io *w)	951	ev_io_stop (EV_P_ struct ev_io *w)
466	{	952	{
		953	ev_clear_pending (EV_A_ (W)w);
467	if (!ev_is_active (w))	954	if (!ev_is_active (w))
468	return;	955	return;
469		956
470	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	957	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
471	ev_stop ((struct ev_watcher *)w);	958	ev_stop (EV_A_ (W)w);
472		959
473	++fdchangecnt;	960	fd_change (EV_A_ w->fd);
474	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
475	fdchanges [fdchangecnt - 1] = w->fd;
476	}	961	}
477		962
478	void	963	void
479	evtimer_start (struct ev_timer *w)	964	ev_timer_start (EV_P_ struct ev_timer *w)
480	{	965	{
481	if (ev_is_active (w))	966	if (ev_is_active (w))
482	return;	967	return;
483		968
484	if (w->is_abs)	969	w->at += mn_now;
		970
		971	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		972
		973	ev_start (EV_A_ (W)w, ++timercnt);
		974	array_needsize (timers, timermax, timercnt, );
		975	timers [timercnt - 1] = w;
		976	upheap ((WT *)timers, timercnt - 1);
		977	}
		978
		979	void
		980	ev_timer_stop (EV_P_ struct ev_timer *w)
		981	{
		982	ev_clear_pending (EV_A_ (W)w);
		983	if (!ev_is_active (w))
		984	return;
		985
		986	if (w->active < timercnt--)
		987	{
		988	timers [w->active - 1] = timers [timercnt];
		989	downheap ((WT *)timers, timercnt, w->active - 1);
485	{	990	}
486	/* this formula differs from the one in timer_reify becuse we do not round up */	991
		992	w->at = w->repeat;
		993
		994	ev_stop (EV_A_ (W)w);
		995	}
		996
		997	void
		998	ev_timer_again (EV_P_ struct ev_timer *w)
		999	{
		1000	if (ev_is_active (w))
		1001	{
487	if (w->repeat)	1002	if (w->repeat)
		1003	{
		1004	w->at = mn_now + w->repeat;
		1005	downheap ((WT *)timers, timercnt, w->active - 1);
		1006	}
		1007	else
		1008	ev_timer_stop (EV_A_ w);
		1009	}
		1010	else if (w->repeat)
		1011	ev_timer_start (EV_A_ w);
		1012	}
		1013
		1014	void
		1015	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1016	{
		1017	if (ev_is_active (w))
		1018	return;
		1019
		1020	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1021
		1022	/* this formula differs from the one in periodic_reify because we do not always round up */
		1023	if (w->interval)
488	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1024	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
489		1025
490	ev_start ((struct ev_watcher *)w, ++atimercnt);	1026	ev_start (EV_A_ (W)w, ++periodiccnt);
491	array_needsize (atimers, atimermax, atimercnt, );	1027	array_needsize (periodics, periodicmax, periodiccnt, );
492	atimers [atimercnt - 1] = w;	1028	periodics [periodiccnt - 1] = w;
493	upheap (atimers, atimercnt - 1);	1029	upheap ((WT *)periodics, periodiccnt - 1);
		1030	}
		1031
		1032	void
		1033	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1034	{
		1035	ev_clear_pending (EV_A_ (W)w);
		1036	if (!ev_is_active (w))
		1037	return;
		1038
		1039	if (w->active < periodiccnt--)
494	}	1040	{
		1041	periodics [w->active - 1] = periodics [periodiccnt];
		1042	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		1043	}
		1044
		1045	ev_stop (EV_A_ (W)w);
		1046	}
		1047
		1048	#ifndef SA_RESTART
		1049	# define SA_RESTART 0
		1050	#endif
		1051
		1052	void
		1053	ev_signal_start (EV_P_ struct ev_signal *w)
		1054	{
		1055	if (ev_is_active (w))
		1056	return;
		1057
		1058	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1059
		1060	ev_start (EV_A_ (W)w, 1);
		1061	array_needsize (signals, signalmax, w->signum, signals_init);
		1062	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1063
		1064	if (!w->next)
		1065	{
		1066	struct sigaction sa;
		1067	sa.sa_handler = sighandler;
		1068	sigfillset (&sa.sa_mask);
		1069	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1070	sigaction (w->signum, &sa, 0);
		1071	}
		1072	}
		1073
		1074	void
		1075	ev_signal_stop (EV_P_ struct ev_signal *w)
		1076	{
		1077	ev_clear_pending (EV_A_ (W)w);
		1078	if (!ev_is_active (w))
		1079	return;
		1080
		1081	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1082	ev_stop (EV_A_ (W)w);
		1083
		1084	if (!signals [w->signum - 1].head)
		1085	signal (w->signum, SIG_DFL);
		1086	}
		1087
		1088	void
		1089	ev_idle_start (EV_P_ struct ev_idle *w)
		1090	{
		1091	if (ev_is_active (w))
		1092	return;
		1093
		1094	ev_start (EV_A_ (W)w, ++idlecnt);
		1095	array_needsize (idles, idlemax, idlecnt, );
		1096	idles [idlecnt - 1] = w;
		1097	}
		1098
		1099	void
		1100	ev_idle_stop (EV_P_ struct ev_idle *w)
		1101	{
		1102	ev_clear_pending (EV_A_ (W)w);
		1103	if (ev_is_active (w))
		1104	return;
		1105
		1106	idles [w->active - 1] = idles [--idlecnt];
		1107	ev_stop (EV_A_ (W)w);
		1108	}
		1109
		1110	void
		1111	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1112	{
		1113	if (ev_is_active (w))
		1114	return;
		1115
		1116	ev_start (EV_A_ (W)w, ++preparecnt);
		1117	array_needsize (prepares, preparemax, preparecnt, );
		1118	prepares [preparecnt - 1] = w;
		1119	}
		1120
		1121	void
		1122	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1123	{
		1124	ev_clear_pending (EV_A_ (W)w);
		1125	if (ev_is_active (w))
		1126	return;
		1127
		1128	prepares [w->active - 1] = prepares [--preparecnt];
		1129	ev_stop (EV_A_ (W)w);
		1130	}
		1131
		1132	void
		1133	ev_check_start (EV_P_ struct ev_check *w)
		1134	{
		1135	if (ev_is_active (w))
		1136	return;
		1137
		1138	ev_start (EV_A_ (W)w, ++checkcnt);
		1139	array_needsize (checks, checkmax, checkcnt, );
		1140	checks [checkcnt - 1] = w;
		1141	}
		1142
		1143	void
		1144	ev_check_stop (EV_P_ struct ev_check *w)
		1145	{
		1146	ev_clear_pending (EV_A_ (W)w);
		1147	if (ev_is_active (w))
		1148	return;
		1149
		1150	checks [w->active - 1] = checks [--checkcnt];
		1151	ev_stop (EV_A_ (W)w);
		1152	}
		1153
		1154	void
		1155	ev_child_start (EV_P_ struct ev_child *w)
		1156	{
		1157	if (ev_is_active (w))
		1158	return;
		1159
		1160	ev_start (EV_A_ (W)w, 1);
		1161	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1162	}
		1163
		1164	void
		1165	ev_child_stop (EV_P_ struct ev_child *w)
		1166	{
		1167	ev_clear_pending (EV_A_ (W)w);
		1168	if (ev_is_active (w))
		1169	return;
		1170
		1171	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1172	ev_stop (EV_A_ (W)w);
		1173	}
		1174
		1175	/*****************************************************************************/
		1176
		1177	struct ev_once
		1178	{
		1179	struct ev_io io;
		1180	struct ev_timer to;
		1181	void (*cb)(int revents, void *arg);
		1182	void *arg;
		1183	};
		1184
		1185	static void
		1186	once_cb (EV_P_ struct ev_once *once, int revents)
		1187	{
		1188	void (*cb)(int revents, void *arg) = once->cb;
		1189	void *arg = once->arg;
		1190
		1191	ev_io_stop (EV_A_ &once->io);
		1192	ev_timer_stop (EV_A_ &once->to);
		1193	free (once);
		1194
		1195	cb (revents, arg);
		1196	}
		1197
		1198	static void
		1199	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1200	{
		1201	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1202	}
		1203
		1204	static void
		1205	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1206	{
		1207	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1208	}
		1209
		1210	void
		1211	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1212	{
		1213	struct ev_once *once = malloc (sizeof (struct ev_once));
		1214
		1215	if (!once)
		1216	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
495	else	1217	else
496	{	1218	{
497	w->at += now;	1219	once->cb = cb;
		1220	once->arg = arg;
498		1221
499	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1222	ev_watcher_init (&once->io, once_cb_io);
500	array_needsize (rtimers, rtimermax, rtimercnt, );	1223	if (fd >= 0)
501	rtimers [rtimercnt - 1] = w;
502	upheap (rtimers, rtimercnt - 1);
503	}
504
505	}
506
507	void
508	evtimer_stop (struct ev_timer *w)
509	{
510	if (!ev_is_active (w))
511	return;
512
513	if (w->is_abs)
514	{
515	if (w->active < atimercnt--)
516	{	1224	{
517	atimers [w->active - 1] = atimers [atimercnt];	1225	ev_io_set (&once->io, fd, events);
518	downheap (atimers, atimercnt, w->active - 1);	1226	ev_io_start (EV_A_ &once->io);
519	}	1227	}
520	}	1228
521	else	1229	ev_watcher_init (&once->to, once_cb_to);
522	{	1230	if (timeout >= 0.)
523	if (w->active < rtimercnt--)
524	{	1231	{
525	rtimers [w->active - 1] = rtimers [rtimercnt];	1232	ev_timer_set (&once->to, timeout, 0.);
526	downheap (rtimers, rtimercnt, w->active - 1);	1233	ev_timer_start (EV_A_ &once->to);
527	}	1234	}
528	}	1235	}
529
530	ev_stop ((struct ev_watcher *)w);
531	}
532
533	void
534	evsignal_start (struct ev_signal *w)
535	{
536	if (ev_is_active (w))
537	return;
538
539	ev_start ((struct ev_watcher *)w, 1);
540	array_needsize (signals, signalmax, w->signum, signals_init);
541	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
542	}
543
544	void
545	evsignal_stop (struct ev_signal *w)
546	{
547	if (!ev_is_active (w))
548	return;
549
550	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
551	ev_stop ((struct ev_watcher *)w);
552	}	1236	}
553		1237
554	/*****************************************************************************/	1238	/*****************************************************************************/
		1239
555	#if 1	1240	#if 0
		1241
		1242	struct ev_io wio;
556		1243
557	static void	1244	static void
558	sin_cb (struct ev_io *w, int revents)	1245	sin_cb (struct ev_io *w, int revents)
559	{	1246	{
560	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1247	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
562		1249
563	static void	1250	static void
564	ocb (struct ev_timer *w, int revents)	1251	ocb (struct ev_timer *w, int revents)
565	{	1252	{
566	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1253	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
567	evtimer_stop (w);	1254	ev_timer_stop (w);
568	evtimer_start (w);	1255	ev_timer_start (w);
		1256	}
		1257
		1258	static void
		1259	scb (struct ev_signal *w, int revents)
		1260	{
		1261	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1262	ev_io_stop (&wio);
		1263	ev_io_start (&wio);
		1264	}
		1265
		1266	static void
		1267	gcb (struct ev_signal *w, int revents)
		1268	{
		1269	fprintf (stderr, "generic %x\n", revents);
		1270
569	}	1271	}
570		1272
571	int main (void)	1273	int main (void)
572	{	1274	{
573	struct ev_io sin;
574
575	ev_init (0);	1275	ev_init (0);
576		1276
577	evw_init (&sin, sin_cb, 55);
578	evio_set (&sin, 0, EV_READ);	1277	ev_io_init (&wio, sin_cb, 0, EV_READ);
579	evio_start (&sin);	1278	ev_io_start (&wio);
580		1279
581	struct ev_timer t[10000];	1280	struct ev_timer t[10000];
582		1281
583	#if 1	1282	#if 0
584	int i;	1283	int i;
585	for (i = 0; i < 10000; ++i)	1284	for (i = 0; i < 10000; ++i)
586	{	1285	{
587	struct ev_timer *w = t + i;	1286	struct ev_timer *w = t + i;
588	evw_init (w, ocb, i);	1287	ev_watcher_init (w, ocb, i);
589	evtimer_set_abs (w, drand48 (), 0.99775533);	1288	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
590	evtimer_start (w);	1289	ev_timer_start (w);
591	if (drand48 () < 0.5)	1290	if (drand48 () < 0.5)
592	evtimer_stop (w);	1291	ev_timer_stop (w);
593	}	1292	}
594	#endif	1293	#endif
595		1294
596	struct ev_timer t1;	1295	struct ev_timer t1;
597	evw_init (&t1, ocb, 0);	1296	ev_timer_init (&t1, ocb, 5, 10);
598	evtimer_set_abs (&t1, 5, 10);
599	evtimer_start (&t1);	1297	ev_timer_start (&t1);
		1298
		1299	struct ev_signal sig;
		1300	ev_signal_init (&sig, scb, SIGQUIT);
		1301	ev_signal_start (&sig);
		1302
		1303	struct ev_check cw;
		1304	ev_check_init (&cw, gcb);
		1305	ev_check_start (&cw);
		1306
		1307	struct ev_idle iw;
		1308	ev_idle_init (&iw, gcb);
		1309	ev_idle_start (&iw);
600		1310
601	ev_loop (0);	1311	ev_loop (0);
602		1312
603	return 0;	1313	return 0;
604	}	1314	}

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