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Comparing libev/ev.c (file contents):
Revision 1.5 by root, Tue Oct 30 23:54:38 2007 UTC vs.
Revision 1.50 by root, Sat Nov 3 19:41:55 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_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
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
15	#define HAVE_EPOLL 1	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
16	#define HAVE_REALTIME 1	88	# define EV_USE_REALTIME 0
17	#define HAVE_SELECT 1	89	#endif
		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);
26	};
27
28	struct ev_watcher_list {	115	typedef struct ev_watcher_list *WL;
29	EV_WATCHER_LIST (ev_watcher_list);	116	typedef struct ev_watcher_time *WT;
30	};
31		117
32	static ev_tstamp now, diff; /* monotonic clock */	118	static ev_tstamp now_floor, now, diff; /* monotonic clock */
33	ev_tstamp ev_now;	119	ev_tstamp ev_now;
34	int ev_method;	120	int ev_method;
35		121
36	static int have_monotonic; /* runtime */	122	static int have_monotonic; /* runtime */
37		123
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
39	static void (*method_modify)(int fd, int oev, int nev);	125	static void (*method_modify)(int fd, int oev, int nev);
40	static void (*method_poll)(ev_tstamp timeout);	126	static void (*method_poll)(ev_tstamp timeout);
41		127
		128	/*****************************************************************************/
		129
42	ev_tstamp	130	ev_tstamp
43	ev_time (void)	131	ev_time (void)
44	{	132	{
45	#if HAVE_REALTIME	133	#if EV_USE_REALTIME
46	struct timespec ts;	134	struct timespec ts;
47	clock_gettime (CLOCK_REALTIME, &ts);	135	clock_gettime (CLOCK_REALTIME, &ts);
48	return ts.tv_sec + ts.tv_nsec * 1e-9;	136	return ts.tv_sec + ts.tv_nsec * 1e-9;
49	#else	137	#else
50	struct timeval tv;	138	struct timeval tv;
…		…
54	}	142	}
55		143
56	static ev_tstamp	144	static ev_tstamp
57	get_clock (void)	145	get_clock (void)
58	{	146	{
59	#if HAVE_MONOTONIC	147	#if EV_USE_MONOTONIC
60	if (have_monotonic)	148	if (expect_true (have_monotonic))
61	{	149	{
62	struct timespec ts;	150	struct timespec ts;
63	clock_gettime (CLOCK_MONOTONIC, &ts);	151	clock_gettime (CLOCK_MONOTONIC, &ts);
64	return ts.tv_sec + ts.tv_nsec * 1e-9;	152	return ts.tv_sec + ts.tv_nsec * 1e-9;
65	}	153	}
66	#endif	154	#endif
67		155
68	return ev_time ();	156	return ev_time ();
69	}	157	}
70		158
		159	#define array_roundsize(base,n) ((n) | 4 & ~3)
		160
71	#define array_needsize(base,cur,cnt,init) \	161	#define array_needsize(base,cur,cnt,init) \
72	if ((cnt) > cur) \	162	if (expect_false ((cnt) > cur)) \
73	{ \	163	{ \
74	int newcnt = cur ? cur << 1 : 16; \	164	int newcnt = cur; \
75	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	\
76	base = realloc (base, sizeof (*base) * (newcnt)); \	171	base = realloc (base, sizeof (*base) * (newcnt)); \
77	init (base + cur, newcnt - cur); \	172	init (base + cur, newcnt - cur); \
78	cur = newcnt; \	173	cur = newcnt; \
79	}	174	}
80		175
		176	/*****************************************************************************/
		177
81	typedef struct	178	typedef struct
82	{	179	{
83	struct ev_io *head;	180	struct ev_watcher_list *head;
84	unsigned char wev, rev; /* want, received event set */	181	unsigned char events;
		182	unsigned char reify;
85	} ANFD;	183	} ANFD;
86		184
87	static ANFD *anfds;	185	static ANFD *anfds;
88	static int anfdmax;	186	static int anfdmax;
89		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 = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		241	{
		242	int ev = w->events & events;
		243
		244	if (ev)
		245	event ((W)w, ev);
		246	}
		247	}
		248
		249	/*****************************************************************************/
		250
90	static int *fdchanges;	251	static int *fdchanges;
91	static int fdchangemax, fdchangecnt;	252	static int fdchangemax, fdchangecnt;
92		253
93	static void	254	static void
94	anfds_init (ANFD *base, int count)	255	fd_reify (void)
95	{	256	{
96	while (count--)	257	int i;
97	{	258
98	base->head = 0;	259	for (i = 0; i < fdchangecnt; ++i)
99	base->wev = base->rev = EV_NONE;
100	++base;
101	}	260	{
102	}	261	int fd = fdchanges [i];
103
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
114	event (struct ev_watcher *w, int events)
115	{
116	w->pending = ++pendingcnt;
117	array_needsize (pendings, pendingmax, pendingcnt, );
118	pendings [pendingcnt - 1].w = w;
119	pendings [pendingcnt - 1].events = events;
120	}
121
122	static void
123	fd_event (int fd, int events)
124	{
125	ANFD *anfd = anfds + fd;	262	ANFD *anfd = anfds + fd;
		263	struct ev_io *w;
		264
		265	int events = 0;
		266
		267	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)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	{
126	struct ev_io *w;	298	struct ev_io *w;
127		299
128	for (w = anfd->head; w; w = w->next)	300	while ((w = (struct ev_io *)anfds [fd].head))
		301	{
		302	ev_io_stop (w);
		303	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);
		304	}
		305	}
		306
		307	/* called on EBADF to verify fds */
		308	static void
		309	fd_ebadf (void)
		310	{
		311	int fd;
		312
		313	for (fd = 0; fd < anfdmax; ++fd)
		314	if (anfds [fd].events)
		315	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		316	fd_kill (fd);
		317	}
		318
		319	/* called on ENOMEM in select/poll to kill some fds and retry */
		320	static void
		321	fd_enomem (void)
		322	{
		323	int fd = anfdmax;
		324
		325	while (fd--)
		326	if (anfds [fd].events)
129	{	327	{
130	int ev = w->events & events;	328	close (fd);
131		329	fd_kill (fd);
132	if (ev)	330	return;
133	event ((struct ev_watcher *)w, ev);
134	}	331	}
135	}	332	}
136		333
		334	/*****************************************************************************/
		335
137	static struct ev_timer **atimers;	336	static struct ev_timer **timers;
138	static int atimermax, atimercnt;	337	static int timermax, timercnt;
139		338
140	static struct ev_timer **rtimers;	339	static struct ev_periodic **periodics;
141	static int rtimermax, rtimercnt;	340	static int periodicmax, periodiccnt;
142		341
143	static void	342	static void
144	upheap (struct ev_timer **timers, int k)	343	upheap (WT *timers, int k)
145	{	344	{
146	struct ev_timer *w = timers [k];	345	WT w = timers [k];
147		346
148	while (k && timers [k >> 1]->at > w->at)	347	while (k && timers [k >> 1]->at > w->at)
149	{	348	{
150	timers [k] = timers [k >> 1];	349	timers [k] = timers [k >> 1];
151	timers [k]->active = k + 1;	350	timers [k]->active = k + 1;
…		…
156	timers [k]->active = k + 1;	355	timers [k]->active = k + 1;
157		356
158	}	357	}
159		358
160	static void	359	static void
161	downheap (struct ev_timer **timers, int N, int k)	360	downheap (WT *timers, int N, int k)
162	{	361	{
163	struct ev_timer *w = timers [k];	362	WT w = timers [k];
164		363
165	while (k < (N >> 1))	364	while (k < (N >> 1))
166	{	365	{
167	int j = k << 1;	366	int j = k << 1;
168		367
…		…
179		378
180	timers [k] = w;	379	timers [k] = w;
181	timers [k]->active = k + 1;	380	timers [k]->active = k + 1;
182	}	381	}
183		382
184	static struct ev_signal **signals;	383	/*****************************************************************************/
		384
		385	typedef struct
		386	{
		387	struct ev_watcher_list *head;
		388	sig_atomic_t volatile gotsig;
		389	} ANSIG;
		390
		391	static ANSIG *signals;
185	static int signalmax;	392	static int signalmax;
186		393
		394	static int sigpipe [2];
		395	static sig_atomic_t volatile gotsig;
		396	static struct ev_io sigev;
		397
187	static void	398	static void
188	signals_init (struct ev_signal **base, int count)	399	signals_init (ANSIG *base, int count)
189	{	400	{
190	while (count--)	401	while (count--)
191	*base++ = 0;	402	{
192	}	403	base->head = 0;
		404	base->gotsig = 0;
193		405
		406	++base;
		407	}
		408	}
		409
		410	static void
		411	sighandler (int signum)
		412	{
		413	signals [signum - 1].gotsig = 1;
		414
		415	if (!gotsig)
		416	{
		417	int old_errno = errno;
		418	gotsig = 1;
		419	write (sigpipe [1], &signum, 1);
		420	errno = old_errno;
		421	}
		422	}
		423
		424	static void
		425	sigcb (struct ev_io *iow, int revents)
		426	{
		427	struct ev_watcher_list *w;
		428	int signum;
		429
		430	read (sigpipe [0], &revents, 1);
		431	gotsig = 0;
		432
		433	for (signum = signalmax; signum--; )
		434	if (signals [signum].gotsig)
		435	{
		436	signals [signum].gotsig = 0;
		437
		438	for (w = signals [signum].head; w; w = w->next)
		439	event ((W)w, EV_SIGNAL);
		440	}
		441	}
		442
		443	static void
		444	siginit (void)
		445	{
		446	#ifndef WIN32
		447	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		448	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		449
		450	/* rather than sort out wether we really need nb, set it */
		451	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		452	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		453	#endif
		454
		455	ev_io_set (&sigev, sigpipe [0], EV_READ);
		456	ev_io_start (&sigev);
		457	}
		458
		459	/*****************************************************************************/
		460
		461	static struct ev_idle **idles;
		462	static int idlemax, idlecnt;
		463
		464	static struct ev_prepare **prepares;
		465	static int preparemax, preparecnt;
		466
		467	static struct ev_check **checks;
		468	static int checkmax, checkcnt;
		469
		470	/*****************************************************************************/
		471
		472	static struct ev_child *childs [PID_HASHSIZE];
		473	static struct ev_signal childev;
		474
		475	#ifndef WIN32
		476
		477	#ifndef WCONTINUED
		478	# define WCONTINUED 0
		479	#endif
		480
		481	static void
		482	child_reap (struct ev_signal *sw, int chain, int pid, int status)
		483	{
		484	struct ev_child *w;
		485
		486	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		487	if (w->pid == pid || !w->pid)
		488	{
		489	w->priority = sw->priority; /* need to do it *now* */
		490	w->rpid = pid;
		491	w->rstatus = status;
		492	event ((W)w, EV_CHILD);
		493	}
		494	}
		495
		496	static void
		497	childcb (struct ev_signal *sw, int revents)
		498	{
		499	int pid, status;
		500
		501	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		502	{
		503	/* make sure we are called again until all childs have been reaped */
		504	event ((W)sw, EV_SIGNAL);
		505
		506	child_reap (sw, pid, pid, status);
		507	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		508	}
		509	}
		510
		511	#endif
		512
		513	/*****************************************************************************/
		514
		515	#if EV_USE_KQUEUE
		516	# include "ev_kqueue.c"
		517	#endif
194	#if HAVE_EPOLL	518	#if EV_USE_EPOLL
195	# include "ev_epoll.c"	519	# include "ev_epoll.c"
196	#endif	520	#endif
		521	#if EV_USE_POLL
		522	# include "ev_poll.c"
		523	#endif
197	#if HAVE_SELECT	524	#if EV_USE_SELECT
198	# include "ev_select.c"	525	# include "ev_select.c"
199	#endif	526	#endif
200		527
		528	int
		529	ev_version_major (void)
		530	{
		531	return EV_VERSION_MAJOR;
		532	}
		533
		534	int
		535	ev_version_minor (void)
		536	{
		537	return EV_VERSION_MINOR;
		538	}
		539
		540	/* return true if we are running with elevated privileges and should ignore env variables */
		541	static int
		542	enable_secure ()
		543	{
		544	#ifdef WIN32
		545	return 0;
		546	#else
		547	return getuid () != geteuid ()
		548	|| getgid () != getegid ();
		549	#endif
		550	}
		551
201	int ev_init (int flags)	552	int ev_init (int methods)
202	{	553	{
		554	if (!ev_method)
		555	{
203	#if HAVE_MONOTONIC	556	#if EV_USE_MONOTONIC
204	{	557	{
205	struct timespec ts;	558	struct timespec ts;
206	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	559	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
207	have_monotonic = 1;	560	have_monotonic = 1;
208	}	561	}
209	#endif	562	#endif
210		563
211	ev_now = ev_time ();	564	ev_now = ev_time ();
212	now = get_clock ();	565	now = get_clock ();
		566	now_floor = now;
213	diff = ev_now - now;	567	diff = ev_now - now;
214		568
		569	if (pipe (sigpipe))
		570	return 0;
		571
		572	if (methods == EVMETHOD_AUTO)
		573	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		574	methods = atoi (getenv ("LIBEV_METHODS"));
		575	else
		576	methods = EVMETHOD_ANY;
		577
		578	ev_method = 0;
		579	#if EV_USE_KQUEUE
		580	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
		581	#endif
215	#if HAVE_EPOLL	582	#if EV_USE_EPOLL
216	if (epoll_init (flags))	583	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
217	return ev_method;
218	#endif	584	#endif
		585	#if EV_USE_POLL
		586	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
		587	#endif
219	#if HAVE_SELECT	588	#if EV_USE_SELECT
220	if (select_init (flags))	589	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
221	return ev_method;
222	#endif	590	#endif
223		591
224	ev_method = EVMETHOD_NONE;	592	if (ev_method)
		593	{
		594	ev_watcher_init (&sigev, sigcb);
		595	ev_set_priority (&sigev, EV_MAXPRI);
		596	siginit ();
		597
		598	#ifndef WIN32
		599	ev_signal_init (&childev, childcb, SIGCHLD);
		600	ev_set_priority (&childev, EV_MAXPRI);
		601	ev_signal_start (&childev);
		602	#endif
		603	}
		604	}
		605
225	return ev_method;	606	return ev_method;
226	}	607	}
227		608
228	void ev_prefork (void)	609	/*****************************************************************************/
229	{
230	}
231		610
		611	void
		612	ev_fork_prepare (void)
		613	{
		614	/* nop */
		615	}
		616
		617	void
232	void ev_postfork_parent (void)	618	ev_fork_parent (void)
233	{	619	{
		620	/* nop */
234	}	621	}
235		622
		623	void
236	void ev_postfork_child (void)	624	ev_fork_child (void)
237	{	625	{
238	#if HAVE_EPOLL	626	#if EV_USE_EPOLL
239	if (ev_method == EVMETHOD_EPOLL)	627	if (ev_method == EVMETHOD_EPOLL)
240	epoll_postfork_child ();	628	epoll_postfork_child ();
241	#endif	629	#endif
242	}
243		630
		631	ev_io_stop (&sigev);
		632	close (sigpipe [0]);
		633	close (sigpipe [1]);
		634	pipe (sigpipe);
		635	siginit ();
		636	}
		637
		638	/*****************************************************************************/
		639
244	static void	640	static void
245	fd_reify (void)	641	call_pending (void)
246	{	642	{
247	int i;	643	int pri;
248		644
249	for (i = 0; i < fdchangecnt; ++i)	645	for (pri = NUMPRI; pri--; )
250	{	646	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	{	647	{
262	method_modify (fd, anfd->wev, wev);	648	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
263	anfd->wev = wev;
264	}
265	}
266		649
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)	650	if (p->w)
280	{	651	{
281	p->w->pending = 0;	652	p->w->pending = 0;
282	p->w->cb (p->w, p->events);	653	p->w->cb (p->w, p->events);
283	}	654	}
284	}	655	}
285
286	pendingcnt = 0;
287	}	656	}
288		657
289	static void	658	static void
290	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	659	timers_reify (void)
291	{	660	{
292	while (timercnt && timers [0]->at <= now)	661	while (timercnt && timers [0]->at <= now)
293	{	662	{
294	struct ev_timer *w = timers [0];	663	struct ev_timer *w = timers [0];
295		664
296	/* first reschedule or stop timer */	665	/* first reschedule or stop timer */
297	if (w->repeat)	666	if (w->repeat)
298	{	667	{
299	if (w->is_abs)	668	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;	669	w->at = now + w->repeat;
303
304	assert (w->at > now);
305
306	downheap (timers, timercnt, 0);	670	downheap ((WT *)timers, timercnt, 0);
307	}	671	}
308	else	672	else
		673	ev_timer_stop (w); /* nonrepeating: stop timer */
		674
		675	event ((W)w, EV_TIMEOUT);
		676	}
		677	}
		678
		679	static void
		680	periodics_reify (void)
		681	{
		682	while (periodiccnt && periodics [0]->at <= ev_now)
		683	{
		684	struct ev_periodic *w = periodics [0];
		685
		686	/* first reschedule or stop timer */
		687	if (w->interval)
309	{	688	{
310	evtimer_stop (w); /* nonrepeating: stop timer */	689	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
311	--timercnt; /* maybe pass by reference instead? */	690	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));
		691	downheap ((WT *)periodics, periodiccnt, 0);
312	}	692	}
		693	else
		694	ev_periodic_stop (w); /* nonrepeating: stop timer */
313		695
314	event ((struct ev_watcher *)w, EV_TIMEOUT);	696	event ((W)w, EV_PERIODIC);
315	}	697	}
316	}	698	}
317		699
318	static void	700	static void
319	time_update ()	701	periodics_reschedule (ev_tstamp diff)
320	{	702	{
321	int i;	703	int i;
322	ev_now = ev_time ();
323		704
324	if (have_monotonic)	705	/* adjust periodics after time jump */
		706	for (i = 0; i < periodiccnt; ++i)
325	{	707	{
326	ev_tstamp odiff = diff;	708	struct ev_periodic *w = periodics [i];
327		709
328	/* detecting time jumps is much more difficult */	710	if (w->interval)
329	for (i = 2; --i; ) /* loop a few times, before making important decisions */
330	{	711	{
331	now = get_clock ();	712	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
332	diff = ev_now - now;
333		713
334	if (fabs (odiff - diff) < MIN_TIMEJUMP)	714	if (fabs (diff) >= 1e-4)
335	return; /* all is well */	715	{
		716	ev_periodic_stop (w);
		717	ev_periodic_start (w);
336		718
337	ev_now = ev_time ();	719	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		720	}
338	}	721	}
		722	}
		723	}
339		724
340	/* time jump detected, reschedule atimers */	725	static int
341	for (i = 0; i < atimercnt; ++i)	726	time_update_monotonic (void)
		727	{
		728	now = get_clock ();
		729
		730	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
		731	{
		732	ev_now = now + diff;
		733	return 0;
		734	}
		735	else
		736	{
		737	now_floor = now;
		738	ev_now = ev_time ();
		739	return 1;
		740	}
		741	}
		742
		743	static void
		744	time_update (void)
		745	{
		746	int i;
		747
		748	#if EV_USE_MONOTONIC
		749	if (expect_true (have_monotonic))
		750	{
		751	if (time_update_monotonic ())
342	{	752	{
343	struct ev_timer *w = atimers [i];	753	ev_tstamp odiff = diff;
344	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	754
		755	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		756	{
		757	diff = ev_now - now;
		758
		759	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		760	return; /* all is well */
		761
		762	ev_now = ev_time ();
		763	now = get_clock ();
		764	now_floor = now;
		765	}
		766
		767	periodics_reschedule (diff - odiff);
		768	/* no timer adjustment, as the monotonic clock doesn't jump */
345	}	769	}
346	}	770	}
347	else	771	else
		772	#endif
348	{	773	{
		774	ev_now = ev_time ();
		775
349	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	776	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
350	/* time jump detected, adjust rtimers */	777	{
		778	periodics_reschedule (ev_now - now);
		779
		780	/* adjust timers. this is easy, as the offset is the same for all */
351	for (i = 0; i < rtimercnt; ++i)	781	for (i = 0; i < timercnt; ++i)
352	rtimers [i]->at += ev_now - now;	782	timers [i]->at += diff;
		783	}
353		784
354	now = ev_now;	785	now = ev_now;
355	}	786	}
356	}	787	}
357		788
358	int ev_loop_done;	789	int ev_loop_done;
359		790
360	void ev_loop (int flags)	791	void ev_loop (int flags)
361	{	792	{
362	double block;	793	double block;
363	ev_loop_done = flags & EVLOOP_ONESHOT;	794	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
364		795
365	do	796	do
366	{	797	{
		798	/* queue check watchers (and execute them) */
		799	if (expect_false (preparecnt))
		800	{
		801	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		802	call_pending ();
		803	}
		804
367	/* update fd-related kernel structures */	805	/* update fd-related kernel structures */
368	fd_reify ();	806	fd_reify ();
369		807
370	/* calculate blocking time */	808	/* calculate blocking time */
		809
		810	/* we only need this for !monotonic clockor timers, but as we basically
		811	always have timers, we just calculate it always */
		812	#if EV_USE_MONOTONIC
		813	if (expect_true (have_monotonic))
		814	time_update_monotonic ();
		815	else
		816	#endif
		817	{
		818	ev_now = ev_time ();
		819	now = ev_now;
		820	}
		821
371	if (flags & EVLOOP_NONBLOCK)	822	if (flags & EVLOOP_NONBLOCK || idlecnt)
372	block = 0.;	823	block = 0.;
373	else	824	else
374	{	825	{
375	block = MAX_BLOCKTIME;	826	block = MAX_BLOCKTIME;
376		827
377	if (rtimercnt)	828	if (timercnt)
378	{	829	{
379	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	830	ev_tstamp to = timers [0]->at - now + method_fudge;
380	if (block > to) block = to;	831	if (block > to) block = to;
381	}	832	}
382		833
383	if (atimercnt)	834	if (periodiccnt)
384	{	835	{
385	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	836	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
386	if (block > to) block = to;	837	if (block > to) block = to;
387	}	838	}
388		839
389	if (block < 0.) block = 0.;	840	if (block < 0.) block = 0.;
390	}	841	}
…		…
392	method_poll (block);	843	method_poll (block);
393		844
394	/* update ev_now, do magic */	845	/* update ev_now, do magic */
395	time_update ();	846	time_update ();
396		847
397	/* put pending timers into pendign queue and reschedule them */	848	/* queue pending timers and reschedule them */
398	/* absolute timers first */	849	timers_reify (); /* relative timers called last */
399	timers_reify (atimers, atimercnt, ev_now);	850	periodics_reify (); /* absolute timers called first */
400	/* relative timers second */	851
401	timers_reify (rtimers, rtimercnt, now);	852	/* queue idle watchers unless io or timers are pending */
		853	if (!pendingcnt)
		854	queue_events ((W *)idles, idlecnt, EV_IDLE);
		855
		856	/* queue check watchers, to be executed first */
		857	if (checkcnt)
		858	queue_events ((W *)checks, checkcnt, EV_CHECK);
402		859
403	call_pending ();	860	call_pending ();
404	}	861	}
405	while (!ev_loop_done);	862	while (!ev_loop_done);
406	}
407		863
		864	if (ev_loop_done != 2)
		865	ev_loop_done = 0;
		866	}
		867
		868	/*****************************************************************************/
		869
408	static void	870	static void
409	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	871	wlist_add (WL *head, WL elem)
410	{	872	{
411	elem->next = *head;	873	elem->next = *head;
412	*head = elem;	874	*head = elem;
413	}	875	}
414		876
415	static void	877	static void
416	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	878	wlist_del (WL *head, WL elem)
417	{	879	{
418	while (*head)	880	while (*head)
419	{	881	{
420	if (*head == elem)	882	if (*head == elem)
421	{	883	{
…		…
426	head = &(*head)->next;	888	head = &(*head)->next;
427	}	889	}
428	}	890	}
429		891
430	static void	892	static void
431	ev_start (struct ev_watcher *w, int active)	893	ev_clear_pending (W w)
432	{	894	{
		895	if (w->pending)
		896	{
		897	pendings [ABSPRI (w)][w->pending - 1].w = 0;
433	w->pending = 0;	898	w->pending = 0;
		899	}
		900	}
		901
		902	static void
		903	ev_start (W w, int active)
		904	{
		905	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		906	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		907
434	w->active = active;	908	w->active = active;
435	}	909	}
436		910
437	static void	911	static void
438	ev_stop (struct ev_watcher *w)	912	ev_stop (W w)
439	{	913	{
440	if (w->pending)
441	pendings [w->pending - 1].w = 0;
442
443	w->active = 0;	914	w->active = 0;
444	/* nop */
445	}	915	}
446		916
		917	/*****************************************************************************/
		918
447	void	919	void
448	evio_start (struct ev_io *w)	920	ev_io_start (struct ev_io *w)
449	{	921	{
		922	int fd = w->fd;
		923
450	if (ev_is_active (w))	924	if (ev_is_active (w))
451	return;	925	return;
452		926
453	int fd = w->fd;	927	assert (("ev_io_start called with negative fd", fd >= 0));
454		928
455	ev_start ((struct ev_watcher *)w, 1);	929	ev_start ((W)w, 1);
456	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	930	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
457	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	931	wlist_add ((WL *)&anfds[fd].head, (WL)w);
458		932
459	++fdchangecnt;	933	fd_change (fd);
460	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
461	fdchanges [fdchangecnt - 1] = fd;
462	}	934	}
463		935
464	void	936	void
465	evio_stop (struct ev_io *w)	937	ev_io_stop (struct ev_io *w)
466	{	938	{
		939	ev_clear_pending ((W)w);
467	if (!ev_is_active (w))	940	if (!ev_is_active (w))
468	return;	941	return;
469		942
470	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	943	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
471	ev_stop ((struct ev_watcher *)w);	944	ev_stop ((W)w);
472		945
473	++fdchangecnt;	946	fd_change (w->fd);
474	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
475	fdchanges [fdchangecnt - 1] = w->fd;
476	}	947	}
477		948
478	void	949	void
479	evtimer_start (struct ev_timer *w)	950	ev_timer_start (struct ev_timer *w)
480	{	951	{
481	if (ev_is_active (w))	952	if (ev_is_active (w))
482	return;	953	return;
483		954
484	if (w->is_abs)	955	w->at += now;
		956
		957	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		958
		959	ev_start ((W)w, ++timercnt);
		960	array_needsize (timers, timermax, timercnt, );
		961	timers [timercnt - 1] = w;
		962	upheap ((WT *)timers, timercnt - 1);
		963	}
		964
		965	void
		966	ev_timer_stop (struct ev_timer *w)
		967	{
		968	ev_clear_pending ((W)w);
		969	if (!ev_is_active (w))
		970	return;
		971
		972	if (w->active < timercnt--)
		973	{
		974	timers [w->active - 1] = timers [timercnt];
		975	downheap ((WT *)timers, timercnt, w->active - 1);
485	{	976	}
486	/* this formula differs from the one in timer_reify becuse we do not round up */	977
		978	w->at = w->repeat;
		979
		980	ev_stop ((W)w);
		981	}
		982
		983	void
		984	ev_timer_again (struct ev_timer *w)
		985	{
		986	if (ev_is_active (w))
		987	{
487	if (w->repeat)	988	if (w->repeat)
		989	{
		990	w->at = now + w->repeat;
		991	downheap ((WT *)timers, timercnt, w->active - 1);
		992	}
		993	else
		994	ev_timer_stop (w);
		995	}
		996	else if (w->repeat)
		997	ev_timer_start (w);
		998	}
		999
		1000	void
		1001	ev_periodic_start (struct ev_periodic *w)
		1002	{
		1003	if (ev_is_active (w))
		1004	return;
		1005
		1006	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1007
		1008	/* this formula differs from the one in periodic_reify because we do not always round up */
		1009	if (w->interval)
488	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1010	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
489		1011
490	ev_start ((struct ev_watcher *)w, ++atimercnt);	1012	ev_start ((W)w, ++periodiccnt);
491	array_needsize (atimers, atimermax, atimercnt, );	1013	array_needsize (periodics, periodicmax, periodiccnt, );
492	atimers [atimercnt - 1] = w;	1014	periodics [periodiccnt - 1] = w;
493	upheap (atimers, atimercnt - 1);	1015	upheap ((WT *)periodics, periodiccnt - 1);
		1016	}
		1017
		1018	void
		1019	ev_periodic_stop (struct ev_periodic *w)
		1020	{
		1021	ev_clear_pending ((W)w);
		1022	if (!ev_is_active (w))
		1023	return;
		1024
		1025	if (w->active < periodiccnt--)
494	}	1026	{
		1027	periodics [w->active - 1] = periodics [periodiccnt];
		1028	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		1029	}
		1030
		1031	ev_stop ((W)w);
		1032	}
		1033
		1034	#ifndef SA_RESTART
		1035	# define SA_RESTART 0
		1036	#endif
		1037
		1038	void
		1039	ev_signal_start (struct ev_signal *w)
		1040	{
		1041	if (ev_is_active (w))
		1042	return;
		1043
		1044	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1045
		1046	ev_start ((W)w, 1);
		1047	array_needsize (signals, signalmax, w->signum, signals_init);
		1048	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1049
		1050	if (!w->next)
		1051	{
		1052	struct sigaction sa;
		1053	sa.sa_handler = sighandler;
		1054	sigfillset (&sa.sa_mask);
		1055	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1056	sigaction (w->signum, &sa, 0);
		1057	}
		1058	}
		1059
		1060	void
		1061	ev_signal_stop (struct ev_signal *w)
		1062	{
		1063	ev_clear_pending ((W)w);
		1064	if (!ev_is_active (w))
		1065	return;
		1066
		1067	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1068	ev_stop ((W)w);
		1069
		1070	if (!signals [w->signum - 1].head)
		1071	signal (w->signum, SIG_DFL);
		1072	}
		1073
		1074	void
		1075	ev_idle_start (struct ev_idle *w)
		1076	{
		1077	if (ev_is_active (w))
		1078	return;
		1079
		1080	ev_start ((W)w, ++idlecnt);
		1081	array_needsize (idles, idlemax, idlecnt, );
		1082	idles [idlecnt - 1] = w;
		1083	}
		1084
		1085	void
		1086	ev_idle_stop (struct ev_idle *w)
		1087	{
		1088	ev_clear_pending ((W)w);
		1089	if (ev_is_active (w))
		1090	return;
		1091
		1092	idles [w->active - 1] = idles [--idlecnt];
		1093	ev_stop ((W)w);
		1094	}
		1095
		1096	void
		1097	ev_prepare_start (struct ev_prepare *w)
		1098	{
		1099	if (ev_is_active (w))
		1100	return;
		1101
		1102	ev_start ((W)w, ++preparecnt);
		1103	array_needsize (prepares, preparemax, preparecnt, );
		1104	prepares [preparecnt - 1] = w;
		1105	}
		1106
		1107	void
		1108	ev_prepare_stop (struct ev_prepare *w)
		1109	{
		1110	ev_clear_pending ((W)w);
		1111	if (ev_is_active (w))
		1112	return;
		1113
		1114	prepares [w->active - 1] = prepares [--preparecnt];
		1115	ev_stop ((W)w);
		1116	}
		1117
		1118	void
		1119	ev_check_start (struct ev_check *w)
		1120	{
		1121	if (ev_is_active (w))
		1122	return;
		1123
		1124	ev_start ((W)w, ++checkcnt);
		1125	array_needsize (checks, checkmax, checkcnt, );
		1126	checks [checkcnt - 1] = w;
		1127	}
		1128
		1129	void
		1130	ev_check_stop (struct ev_check *w)
		1131	{
		1132	ev_clear_pending ((W)w);
		1133	if (ev_is_active (w))
		1134	return;
		1135
		1136	checks [w->active - 1] = checks [--checkcnt];
		1137	ev_stop ((W)w);
		1138	}
		1139
		1140	void
		1141	ev_child_start (struct ev_child *w)
		1142	{
		1143	if (ev_is_active (w))
		1144	return;
		1145
		1146	ev_start ((W)w, 1);
		1147	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1148	}
		1149
		1150	void
		1151	ev_child_stop (struct ev_child *w)
		1152	{
		1153	ev_clear_pending ((W)w);
		1154	if (ev_is_active (w))
		1155	return;
		1156
		1157	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1158	ev_stop ((W)w);
		1159	}
		1160
		1161	/*****************************************************************************/
		1162
		1163	struct ev_once
		1164	{
		1165	struct ev_io io;
		1166	struct ev_timer to;
		1167	void (*cb)(int revents, void *arg);
		1168	void *arg;
		1169	};
		1170
		1171	static void
		1172	once_cb (struct ev_once *once, int revents)
		1173	{
		1174	void (*cb)(int revents, void *arg) = once->cb;
		1175	void *arg = once->arg;
		1176
		1177	ev_io_stop (&once->io);
		1178	ev_timer_stop (&once->to);
		1179	free (once);
		1180
		1181	cb (revents, arg);
		1182	}
		1183
		1184	static void
		1185	once_cb_io (struct ev_io *w, int revents)
		1186	{
		1187	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1188	}
		1189
		1190	static void
		1191	once_cb_to (struct ev_timer *w, int revents)
		1192	{
		1193	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1194	}
		1195
		1196	void
		1197	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1198	{
		1199	struct ev_once *once = malloc (sizeof (struct ev_once));
		1200
		1201	if (!once)
		1202	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
495	else	1203	else
496	{	1204	{
497	w->at += now;	1205	once->cb = cb;
		1206	once->arg = arg;
498		1207
499	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1208	ev_watcher_init (&once->io, once_cb_io);
500	array_needsize (rtimers, rtimermax, rtimercnt, );	1209	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	{	1210	{
517	atimers [w->active - 1] = atimers [atimercnt];	1211	ev_io_set (&once->io, fd, events);
518	downheap (atimers, atimercnt, w->active - 1);	1212	ev_io_start (&once->io);
519	}	1213	}
520	}	1214
521	else	1215	ev_watcher_init (&once->to, once_cb_to);
522	{	1216	if (timeout >= 0.)
523	if (w->active < rtimercnt--)
524	{	1217	{
525	rtimers [w->active - 1] = rtimers [rtimercnt];	1218	ev_timer_set (&once->to, timeout, 0.);
526	downheap (rtimers, rtimercnt, w->active - 1);	1219	ev_timer_start (&once->to);
527	}	1220	}
528	}	1221	}
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	}	1222	}
553		1223
554	/*****************************************************************************/	1224	/*****************************************************************************/
		1225
555	#if 1	1226	#if 0
		1227
		1228	struct ev_io wio;
556		1229
557	static void	1230	static void
558	sin_cb (struct ev_io *w, int revents)	1231	sin_cb (struct ev_io *w, int revents)
559	{	1232	{
560	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1233	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
562		1235
563	static void	1236	static void
564	ocb (struct ev_timer *w, int revents)	1237	ocb (struct ev_timer *w, int revents)
565	{	1238	{
566	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1239	//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);	1240	ev_timer_stop (w);
568	evtimer_start (w);	1241	ev_timer_start (w);
		1242	}
		1243
		1244	static void
		1245	scb (struct ev_signal *w, int revents)
		1246	{
		1247	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1248	ev_io_stop (&wio);
		1249	ev_io_start (&wio);
		1250	}
		1251
		1252	static void
		1253	gcb (struct ev_signal *w, int revents)
		1254	{
		1255	fprintf (stderr, "generic %x\n", revents);
		1256
569	}	1257	}
570		1258
571	int main (void)	1259	int main (void)
572	{	1260	{
573	struct ev_io sin;
574
575	ev_init (0);	1261	ev_init (0);
576		1262
577	evw_init (&sin, sin_cb, 55);
578	evio_set (&sin, 0, EV_READ);	1263	ev_io_init (&wio, sin_cb, 0, EV_READ);
579	evio_start (&sin);	1264	ev_io_start (&wio);
580		1265
581	struct ev_timer t[10000];	1266	struct ev_timer t[10000];
582		1267
583	#if 1	1268	#if 0
584	int i;	1269	int i;
585	for (i = 0; i < 10000; ++i)	1270	for (i = 0; i < 10000; ++i)
586	{	1271	{
587	struct ev_timer *w = t + i;	1272	struct ev_timer *w = t + i;
588	evw_init (w, ocb, i);	1273	ev_watcher_init (w, ocb, i);
589	evtimer_set_abs (w, drand48 (), 0.99775533);	1274	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
590	evtimer_start (w);	1275	ev_timer_start (w);
591	if (drand48 () < 0.5)	1276	if (drand48 () < 0.5)
592	evtimer_stop (w);	1277	ev_timer_stop (w);
593	}	1278	}
594	#endif	1279	#endif
595		1280
596	struct ev_timer t1;	1281	struct ev_timer t1;
597	evw_init (&t1, ocb, 0);	1282	ev_timer_init (&t1, ocb, 5, 10);
598	evtimer_set_abs (&t1, 5, 10);
599	evtimer_start (&t1);	1283	ev_timer_start (&t1);
		1284
		1285	struct ev_signal sig;
		1286	ev_signal_init (&sig, scb, SIGQUIT);
		1287	ev_signal_start (&sig);
		1288
		1289	struct ev_check cw;
		1290	ev_check_init (&cw, gcb);
		1291	ev_check_start (&cw);
		1292
		1293	struct ev_idle iw;
		1294	ev_idle_init (&iw, gcb);
		1295	ev_idle_start (&iw);
600		1296
601	ev_loop (0);	1297	ev_loop (0);
602		1298
603	return 0;	1299	return 0;
604	}	1300	}

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