[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC

…		…
		1	/*
		2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions are
		7	* met:
		8	*
		9	* * Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	*
		12	* * Redistributions in binary form must reproduce the above
		13	* copyright notice, this list of conditions and the following
		14	* disclaimer in the documentation and/or other materials provided
		15	* with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		18	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		19	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		20	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		21	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		22	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		23	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		28	*/
		29	#if EV_USE_CONFIG_H
		30	# include "config.h"
		31	#endif
		32
1	#include <math.h>	33	#include <math.h>
2	#include <stdlib.h>	34	#include <stdlib.h>
3	#include <unistd.h>	35	#include <unistd.h>
4	#include <fcntl.h>	36	#include <fcntl.h>
5	#include <signal.h>	37	#include <signal.h>
		38	#include <stddef.h>
6		39
7	#include <stdio.h>	40	#include <stdio.h>
8		41
9	#include <assert.h>	42	#include <assert.h>
10	#include <errno.h>	43	#include <errno.h>
		44	#include <sys/types.h>
		45	#include <sys/wait.h>
11	#include <sys/time.h>	46	#include <sys/time.h>
12	#include <time.h>	47	#include <time.h>
13		48
14	#ifndef HAVE_MONOTONIC	49	#ifndef EV_USE_MONOTONIC
15	# ifdef CLOCK_MONOTONIC	50	# ifdef CLOCK_MONOTONIC
16	# define HAVE_MONOTONIC 1	51	# define EV_USE_MONOTONIC 1
17	# endif	52	# endif
18	#endif	53	#endif
19		54
20	#ifndef HAVE_SELECT	55	#ifndef EV_USE_SELECT
21	# define HAVE_SELECT 1	56	# define EV_USE_SELECT 1
22	#endif	57	#endif
23		58
24	#ifndef HAVE_EPOLL	59	#ifndef EV_USE_EPOLL
25	# define HAVE_EPOLL 0	60	# define EV_USE_EPOLL 0
26	#endif	61	#endif
27		62
		63	#ifndef CLOCK_REALTIME
		64	# define EV_USE_REALTIME 0
		65	#endif
28	#ifndef HAVE_REALTIME	66	#ifndef EV_USE_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */
30	#endif	68	#endif
31		69
32	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
33	#define MAX_BLOCKTIME 60.	71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */
		72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
34		74
35	#include "ev.h"	75	#include "ev.h"
36
37	struct ev_watcher {
38	EV_WATCHER (ev_watcher);
39	};
40
41	struct ev_watcher_list {
42	EV_WATCHER_LIST (ev_watcher_list);
43	};
44		76
45	typedef struct ev_watcher *W;	77	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	78	typedef struct ev_watcher_list *WL;
		79	typedef struct ev_watcher_time *WT;
47		80
48	static ev_tstamp now, diff; /* monotonic clock */	81	static ev_tstamp now, diff; /* monotonic clock */
49	ev_tstamp ev_now;	82	ev_tstamp ev_now;
50	int ev_method;	83	int ev_method;
51		84
58	/*****************************************************************************/	91	/*****************************************************************************/
59		92
60	ev_tstamp	93	ev_tstamp
61	ev_time (void)	94	ev_time (void)
62	{	95	{
63	#if HAVE_REALTIME	96	#if EV_USE_REALTIME
64	struct timespec ts;	97	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	98	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	99	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	100	#else
68	struct timeval tv;	101	struct timeval tv;
…		…
72	}	105	}
73		106
74	static ev_tstamp	107	static ev_tstamp
75	get_clock (void)	108	get_clock (void)
76	{	109	{
77	#if HAVE_MONOTONIC	110	#if EV_USE_MONOTONIC
78	if (have_monotonic)	111	if (have_monotonic)
79	{	112	{
80	struct timespec ts;	113	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	114	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	115	return ts.tv_sec + ts.tv_nsec * 1e-9;
…		…
84	#endif	117	#endif
85		118
86	return ev_time ();	119	return ev_time ();
87	}	120	}
88		121
		122	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		123
89	#define array_needsize(base,cur,cnt,init) \	124	#define array_needsize(base,cur,cnt,init) \
90	if ((cnt) > cur) \	125	if ((cnt) > cur) \
91	{ \	126	{ \
92	int newcnt = cur ? cur << 1 : 16; \	127	int newcnt = cur; \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	128	do \
		129	{ \
		130	newcnt = array_roundsize (base, newcnt << 1); \
		131	} \
		132	while ((cnt) > newcnt); \
		133	\
94	base = realloc (base, sizeof (base) (newcnt)); \	134	base = realloc (base, sizeof (base) (newcnt)); \
95	init (base + cur, newcnt - cur); \	135	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	136	cur = newcnt; \
97	}	137	}
98		138
99	/*****************************************************************************/	139	/*****************************************************************************/
100		140
101	typedef struct	141	typedef struct
102	{	142	{
103	struct ev_io *head;	143	struct ev_io *head;
104	unsigned char wev, rev; /* want, received event set */	144	unsigned char events;
		145	unsigned char reify;
105	} ANFD;	146	} ANFD;
106		147
107	static ANFD *anfds;	148	static ANFD *anfds;
108	static int anfdmax;	149	static int anfdmax;
109		150
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	151	static void
114	anfds_init (ANFD *base, int count)	152	anfds_init (ANFD *base, int count)
115	{	153	{
116	while (count--)	154	while (count--)
117	{	155	{
118	base->head = 0;	156	base->head = 0;
119	base->wev = base->rev = EV_NONE;	157	base->events = EV_NONE;
		158	base->reify = 0;
		159
120	++base;	160	++base;
121	}	161	}
122	}	162	}
123		163
124	typedef struct	164	typedef struct
…		…
131	static int pendingmax, pendingcnt;	171	static int pendingmax, pendingcnt;
132		172
133	static void	173	static void
134	event (W w, int events)	174	event (W w, int events)
135	{	175	{
		176	if (w->pending)
		177	{
		178	pendings [w->pending - 1].events \|= events;
		179	return;
		180	}
		181
136	w->pending = ++pendingcnt;	182	w->pending = ++pendingcnt;
137	array_needsize (pendings, pendingmax, pendingcnt, );	183	array_needsize (pendings, pendingmax, pendingcnt, );
138	pendings [pendingcnt - 1].w = w;	184	pendings [pendingcnt - 1].w = w;
139	pendings [pendingcnt - 1].events = events;	185	pendings [pendingcnt - 1].events = events;
140	}	186	}
141		187
142	static void	188	static void
		189	queue_events (W *events, int eventcnt, int type)
		190	{
		191	int i;
		192
		193	for (i = 0; i < eventcnt; ++i)
		194	event (events [i], type);
		195	}
		196
		197	static void
143	fd_event (int fd, int events)	198	fd_event (int fd, int events)
144	{	199	{
145	ANFD *anfd = anfds + fd;	200	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	201	struct ev_io *w;
147		202
…		…
152	if (ev)	207	if (ev)
153	event ((W)w, ev);	208	event ((W)w, ev);
154	}	209	}
155	}	210	}
156		211
		212	/*****************************************************************************/
		213
		214	static int *fdchanges;
		215	static int fdchangemax, fdchangecnt;
		216
157	static void	217	static void
158	queue_events (W *events, int eventcnt, int type)	218	fd_reify (void)
159	{	219	{
160	int i;	220	int i;
161		221
162	for (i = 0; i < eventcnt; ++i)	222	for (i = 0; i < fdchangecnt; ++i)
163	event (events [i], type);	223	{
164	}	224	int fd = fdchanges [i];
		225	ANFD *anfd = anfds + fd;
		226	struct ev_io *w;
165		227
166	/*****************************************************************************/	228	int events = 0;
167		229
		230	for (w = anfd->head; w; w = w->next)
		231	events \|= w->events;
		232
		233	anfd->reify = 0;
		234
		235	if (anfd->events != events)
		236	{
		237	method_modify (fd, anfd->events, events);
		238	anfd->events = events;
		239	}
		240	}
		241
		242	fdchangecnt = 0;
		243	}
		244
		245	static void
		246	fd_change (int fd)
		247	{
		248	if (anfds [fd].reify \|\| fdchangecnt < 0)
		249	return;
		250
		251	anfds [fd].reify = 1;
		252
		253	++fdchangecnt;
		254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		255	fdchanges [fdchangecnt - 1] = fd;
		256	}
		257
		258	/* called on EBADF to verify fds */
		259	static void
		260	fd_recheck (void)
		261	{
		262	int fd;
		263
		264	for (fd = 0; fd < anfdmax; ++fd)
		265	if (anfds [fd].events)
		266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		267	while (anfds [fd].head)
		268	{
		269	ev_io_stop (anfds [fd].head);
		270	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);
		271	}
		272	}
		273
		274	/*****************************************************************************/
		275
168	static struct ev_timer **atimers;	276	static struct ev_timer **timers;
169	static int atimermax, atimercnt;	277	static int timermax, timercnt;
170		278
171	static struct ev_timer **rtimers;	279	static struct ev_periodic **periodics;
172	static int rtimermax, rtimercnt;	280	static int periodicmax, periodiccnt;
173		281
174	static void	282	static void
175	upheap (struct ev_timer **timers, int k)	283	upheap (WT *timers, int k)
176	{	284	{
177	struct ev_timer *w = timers [k];	285	WT w = timers [k];
178		286
179	while (k && timers [k >> 1]->at > w->at)	287	while (k && timers [k >> 1]->at > w->at)
180	{	288	{
181	timers [k] = timers [k >> 1];	289	timers [k] = timers [k >> 1];
182	timers [k]->active = k + 1;	290	timers [k]->active = k + 1;
…		…
187	timers [k]->active = k + 1;	295	timers [k]->active = k + 1;
188		296
189	}	297	}
190		298
191	static void	299	static void
192	downheap (struct ev_timer **timers, int N, int k)	300	downheap (WT *timers, int N, int k)
193	{	301	{
194	struct ev_timer *w = timers [k];	302	WT w = timers [k];
195		303
196	while (k < (N >> 1))	304	while (k < (N >> 1))
197	{	305	{
198	int j = k << 1;	306	int j = k << 1;
199		307
…		…
215	/*****************************************************************************/	323	/*****************************************************************************/
216		324
217	typedef struct	325	typedef struct
218	{	326	{
219	struct ev_signal *head;	327	struct ev_signal *head;
220	sig_atomic_t gotsig;	328	sig_atomic_t volatile gotsig;
221	} ANSIG;	329	} ANSIG;
222		330
223	static ANSIG *signals;	331	static ANSIG *signals;
224	static int signalmax;	332	static int signalmax;
225		333
226	static int sigpipe [2];	334	static int sigpipe [2];
227	static sig_atomic_t gotsig;	335	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	336	static struct ev_io sigev;
229		337
230	static void	338	static void
231	signals_init (ANSIG *base, int count)	339	signals_init (ANSIG *base, int count)
232	{	340	{
233	while (count--)	341	while (count--)
234	{	342	{
235	base->head = 0;	343	base->head = 0;
236	base->gotsig = 0;	344	base->gotsig = 0;
		345
237	++base;	346	++base;
238	}	347	}
239	}	348	}
240		349
241	static void	350	static void
…		…
244	signals [signum - 1].gotsig = 1;	353	signals [signum - 1].gotsig = 1;
245		354
246	if (!gotsig)	355	if (!gotsig)
247	{	356	{
248	gotsig = 1;	357	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	358	write (sigpipe [1], &signum, 1);
250	}	359	}
251	}	360	}
252		361
253	static void	362	static void
254	sigcb (struct ev_io *iow, int revents)	363	sigcb (struct ev_io *iow, int revents)
255	{	364	{
256	struct ev_signal *w;	365	struct ev_signal *w;
257	int sig;	366	int sig;
258		367
		368	read (sigpipe [0], &revents, 1);
259	gotsig = 0;	369	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		370
262	for (sig = signalmax; sig--; )	371	for (sig = signalmax; sig--; )
263	if (signals [sig].gotsig)	372	if (signals [sig].gotsig)
264	{	373	{
265	signals [sig].gotsig = 0;	374	signals [sig].gotsig = 0;
…		…
277		386
278	/* rather than sort out wether we really need nb, set it */	387	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
281		390
282	evio_set (&sigev, sigpipe [0], EV_READ);	391	ev_io_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);	392	ev_io_start (&sigev);
284	}	393	}
285		394
286	/*****************************************************************************/	395	/*****************************************************************************/
287		396
288	static struct ev_idle **idles;	397	static struct ev_idle **idles;
289	static int idlemax, idlecnt;	398	static int idlemax, idlecnt;
290		399
		400	static struct ev_prepare **prepares;
		401	static int preparemax, preparecnt;
		402
291	static struct ev_check **checks;	403	static struct ev_check **checks;
292	static int checkmax, checkcnt;	404	static int checkmax, checkcnt;
293		405
294	/*****************************************************************************/	406	/*****************************************************************************/
295		407
		408	static struct ev_child *childs [PID_HASHSIZE];
		409	static struct ev_signal childev;
		410
		411	#ifndef WCONTINUED
		412	# define WCONTINUED 0
		413	#endif
		414
		415	static void
		416	childcb (struct ev_signal *sw, int revents)
		417	{
		418	struct ev_child *w;
		419	int pid, status;
		420
		421	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)
		422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
		423	if (w->pid == pid \|\| w->pid == -1)
		424	{
		425	w->status = status;
		426	event ((W)w, EV_CHILD);
		427	}
		428	}
		429
		430	/*****************************************************************************/
		431
296	#if HAVE_EPOLL	432	#if EV_USE_EPOLL
297	# include "ev_epoll.c"	433	# include "ev_epoll.c"
298	#endif	434	#endif
299	#if HAVE_SELECT	435	#if EV_USE_SELECT
300	# include "ev_select.c"	436	# include "ev_select.c"
301	#endif	437	#endif
302		438
		439	int
		440	ev_version_major (void)
		441	{
		442	return EV_VERSION_MAJOR;
		443	}
		444
		445	int
		446	ev_version_minor (void)
		447	{
		448	return EV_VERSION_MINOR;
		449	}
		450
303	int ev_init (int flags)	451	int ev_init (int flags)
304	{	452	{
305	#if HAVE_MONOTONIC
306	{
307	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;
310	}
311	#endif
312
313	ev_now = ev_time ();
314	now = get_clock ();
315	diff = ev_now - now;
316
317	if (pipe (sigpipe))
318	return 0;
319
320	ev_method = EVMETHOD_NONE;
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)	453	if (!ev_method)
		454	{
		455	#if EV_USE_MONOTONIC
329	{	456	{
		457	struct timespec ts;
		458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		459	have_monotonic = 1;
		460	}
		461	#endif
		462
		463	ev_now = ev_time ();
		464	now = get_clock ();
		465	diff = ev_now - now;
		466
		467	if (pipe (sigpipe))
		468	return 0;
		469
		470	ev_method = EVMETHOD_NONE;
		471	#if EV_USE_EPOLL
		472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
		473	#endif
		474	#if EV_USE_SELECT
		475	if (ev_method == EVMETHOD_NONE) select_init (flags);
		476	#endif
		477
		478	if (ev_method)
		479	{
330	evw_init (&sigev, sigcb, 0);	480	ev_watcher_init (&sigev, sigcb);
331	siginit ();	481	siginit ();
		482
		483	ev_signal_init (&childev, childcb, SIGCHLD);
		484	ev_signal_start (&childev);
		485	}
332	}	486	}
333		487
334	return ev_method;	488	return ev_method;
335	}	489	}
336		490
337	/*****************************************************************************/	491	/*****************************************************************************/
338		492
339	void ev_prefork (void)	493	void
		494	ev_fork_prepare (void)
340	{	495	{
341	/* nop */	496	/* nop */
342	}	497	}
343		498
		499	void
344	void ev_postfork_parent (void)	500	ev_fork_parent (void)
345	{	501	{
346	/* nop */	502	/* nop */
347	}	503	}
348		504
		505	void
349	void ev_postfork_child (void)	506	ev_fork_child (void)
350	{	507	{
351	#if HAVE_EPOLL	508	#if EV_USE_EPOLL
352	if (ev_method == EVMETHOD_EPOLL)	509	if (ev_method == EVMETHOD_EPOLL)
353	epoll_postfork_child ();	510	epoll_postfork_child ();
354	#endif	511	#endif
355		512
356	evio_stop (&sigev);	513	ev_io_stop (&sigev);
357	close (sigpipe [0]);	514	close (sigpipe [0]);
358	close (sigpipe [1]);	515	close (sigpipe [1]);
359	pipe (sigpipe);	516	pipe (sigpipe);
360	siginit ();	517	siginit ();
361	}	518	}
362		519
363	/*****************************************************************************/	520	/*****************************************************************************/
364		521
365	static void	522	static void
366	fd_reify (void)
367	{
368	int i;
369
370	for (i = 0; i < fdchangecnt; ++i)
371	{
372	int fd = fdchanges [i];
373	ANFD *anfd = anfds + fd;
374	struct ev_io *w;
375
376	int wev = 0;
377
378	for (w = anfd->head; w; w = w->next)
379	wev \|= w->events;
380
381	if (anfd->wev != wev)
382	{
383	method_modify (fd, anfd->wev, wev);
384	anfd->wev = wev;
385	}
386	}
387
388	fdchangecnt = 0;
389	}
390
391	static void
392	call_pending ()	523	call_pending (void)
393	{	524	{
394	int i;	525	while (pendingcnt)
395
396	for (i = 0; i < pendingcnt; ++i)
397	{	526	{
398	ANPENDING *p = pendings + i;	527	ANPENDING *p = pendings + --pendingcnt;
399		528
400	if (p->w)	529	if (p->w)
401	{	530	{
402	p->w->pending = 0;	531	p->w->pending = 0;
403	p->w->cb (p->w, p->events);	532	p->w->cb (p->w, p->events);
404	}	533	}
405	}	534	}
406
407	pendingcnt = 0;
408	}	535	}
409		536
410	static void	537	static void
411	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	538	timers_reify (void)
412	{	539	{
413	while (timercnt && timers [0]->at <= now)	540	while (timercnt && timers [0]->at <= now)
414	{	541	{
415	struct ev_timer *w = timers [0];	542	struct ev_timer *w = timers [0];
416		543
417	/* first reschedule or stop timer */	544	/* first reschedule or stop timer */
418	if (w->repeat)	545	if (w->repeat)
419	{	546	{
420	if (w->is_abs)	547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
421	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
422	else
423	w->at = now + w->repeat;	548	w->at = now + w->repeat;
424
425	assert (w->at > now);
426
427	downheap (timers, timercnt, 0);	549	downheap ((WT *)timers, timercnt, 0);
428	}	550	}
429	else	551	else
430	{
431	evtimer_stop (w); /* nonrepeating: stop timer */	552	ev_timer_stop (w); /* nonrepeating: stop timer */
432	--timercnt; /* maybe pass by reference instead? */
433	}
434		553
435	event ((W)w, EV_TIMEOUT);	554	event ((W)w, EV_TIMEOUT);
436	}	555	}
437	}	556	}
438		557
439	static void	558	static void
440	time_update ()	559	periodics_reify (void)
		560	{
		561	while (periodiccnt && periodics [0]->at <= ev_now)
		562	{
		563	struct ev_periodic *w = periodics [0];
		564
		565	/* first reschedule or stop timer */
		566	if (w->interval)
		567	{
		568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));
		570	downheap ((WT *)periodics, periodiccnt, 0);
		571	}
		572	else
		573	ev_periodic_stop (w); /* nonrepeating: stop timer */
		574
		575	event ((W)w, EV_PERIODIC);
		576	}
		577	}
		578
		579	static void
		580	periodics_reschedule (ev_tstamp diff)
441	{	581	{
442	int i;	582	int i;
		583
		584	/* adjust periodics after time jump */
		585	for (i = 0; i < periodiccnt; ++i)
		586	{
		587	struct ev_periodic *w = periodics [i];
		588
		589	if (w->interval)
		590	{
		591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		592
		593	if (fabs (diff) >= 1e-4)
		594	{
		595	ev_periodic_stop (w);
		596	ev_periodic_start (w);
		597
		598	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		599	}
		600	}
		601	}
		602	}
		603
		604	static void
		605	time_update (void)
		606	{
		607	int i;
		608
443	ev_now = ev_time ();	609	ev_now = ev_time ();
444		610
445	if (have_monotonic)	611	if (have_monotonic)
446	{	612	{
447	ev_tstamp odiff = diff;	613	ev_tstamp odiff = diff;
448		614
449	/* detecting time jumps is much more difficult */
450	for (i = 2; --i; ) /* loop a few times, before making important decisions */	615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
451	{	616	{
452	now = get_clock ();	617	now = get_clock ();
453	diff = ev_now - now;	618	diff = ev_now - now;
454		619
455	if (fabs (odiff - diff) < MIN_TIMEJUMP)	620	if (fabs (odiff - diff) < MIN_TIMEJUMP)
456	return; /* all is well */	621	return; /* all is well */
457		622
458	ev_now = ev_time ();	623	ev_now = ev_time ();
459	}	624	}
460		625
461	/* time jump detected, reschedule atimers */	626	periodics_reschedule (diff - odiff);
462	for (i = 0; i < atimercnt; ++i)	627	/* no timer adjustment, as the monotonic clock doesn't jump */
463	{
464	struct ev_timer *w = atimers [i];
465	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
466	}
467	}	628	}
468	else	629	else
469	{	630	{
470	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	631	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
471	/* time jump detected, adjust rtimers */	632	{
		633	periodics_reschedule (ev_now - now);
		634
		635	/* adjust timers. this is easy, as the offset is the same for all */
472	for (i = 0; i < rtimercnt; ++i)	636	for (i = 0; i < timercnt; ++i)
473	rtimers [i]->at += ev_now - now;	637	timers [i]->at += diff;
		638	}
474		639
475	now = ev_now;	640	now = ev_now;
476	}	641	}
477	}	642	}
478		643
479	int ev_loop_done;	644	int ev_loop_done;
480		645
481	void ev_loop (int flags)	646	void ev_loop (int flags)
482	{	647	{
483	double block;	648	double block;
484	ev_loop_done = flags & EVLOOP_ONESHOT;	649	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
485
486	if (checkcnt)
487	{
488	queue_events ((W *)checks, checkcnt, EV_CHECK);
489	call_pending ();
490	}
491		650
492	do	651	do
493	{	652	{
		653	/* queue check watchers (and execute them) */
		654	if (preparecnt)
		655	{
		656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		657	call_pending ();
		658	}
		659
494	/* update fd-related kernel structures */	660	/* update fd-related kernel structures */
495	fd_reify ();	661	fd_reify ();
496		662
497	/* calculate blocking time */	663	/* calculate blocking time */
		664
		665	/* we only need this for !monotonic clockor timers, but as we basically
		666	always have timers, we just calculate it always */
		667	ev_now = ev_time ();
		668
498	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	669	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
499	block = 0.;	670	block = 0.;
500	else	671	else
501	{	672	{
502	block = MAX_BLOCKTIME;	673	block = MAX_BLOCKTIME;
503		674
504	if (rtimercnt)	675	if (timercnt)
505	{	676	{
506	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
507	if (block > to) block = to;	678	if (block > to) block = to;
508	}	679	}
509		680
510	if (atimercnt)	681	if (periodiccnt)
511	{	682	{
512	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
513	if (block > to) block = to;	684	if (block > to) block = to;
514	}	685	}
515		686
516	if (block < 0.) block = 0.;	687	if (block < 0.) block = 0.;
517	}	688	}
…		…
520		691
521	/* update ev_now, do magic */	692	/* update ev_now, do magic */
522	time_update ();	693	time_update ();
523		694
524	/* queue pending timers and reschedule them */	695	/* queue pending timers and reschedule them */
525	/* absolute timers first */	696	timers_reify (); /* relative timers called last */
526	timers_reify (atimers, atimercnt, ev_now);	697	periodics_reify (); /* absolute timers called first */
527	/* relative timers second */
528	timers_reify (rtimers, rtimercnt, now);
529		698
530	/* queue idle watchers unless io or timers are pending */	699	/* queue idle watchers unless io or timers are pending */
531	if (!pendingcnt)	700	if (!pendingcnt)
532	queue_events ((W *)idles, idlecnt, EV_IDLE);	701	queue_events ((W *)idles, idlecnt, EV_IDLE);
533		702
534	/* queue check and possibly idle watchers */	703	/* queue check watchers, to be executed first */
		704	if (checkcnt)
535	queue_events ((W *)checks, checkcnt, EV_CHECK);	705	queue_events ((W *)checks, checkcnt, EV_CHECK);
536		706
537	call_pending ();	707	call_pending ();
538	}	708	}
539	while (!ev_loop_done);	709	while (!ev_loop_done);
		710
		711	if (ev_loop_done != 2)
		712	ev_loop_done = 0;
540	}	713	}
541		714
542	/*****************************************************************************/	715	/*****************************************************************************/
543		716
544	static void	717	static void
…		…
562	head = &(*head)->next;	735	head = &(*head)->next;
563	}	736	}
564	}	737	}
565		738
566	static void	739	static void
		740	ev_clear_pending (W w)
		741	{
		742	if (w->pending)
		743	{
		744	pendings [w->pending - 1].w = 0;
		745	w->pending = 0;
		746	}
		747	}
		748
		749	static void
567	ev_start (W w, int active)	750	ev_start (W w, int active)
568	{	751	{
569	w->pending = 0;
570	w->active = active;	752	w->active = active;
571	}	753	}
572		754
573	static void	755	static void
574	ev_stop (W w)	756	ev_stop (W w)
575	{	757	{
576	if (w->pending)
577	pendings [w->pending - 1].w = 0;
578
579	w->active = 0;	758	w->active = 0;
580	}	759	}
581		760
582	/*****************************************************************************/	761	/*****************************************************************************/
583		762
584	void	763	void
585	evio_start (struct ev_io *w)	764	ev_io_start (struct ev_io *w)
586	{	765	{
587	if (ev_is_active (w))	766	if (ev_is_active (w))
588	return;	767	return;
589		768
590	int fd = w->fd;	769	int fd = w->fd;
		770
		771	assert (("ev_io_start called with negative fd", fd >= 0));
591		772
592	ev_start ((W)w, 1);	773	ev_start ((W)w, 1);
593	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
594	wlist_add ((WL *)&anfds[fd].head, (WL)w);	775	wlist_add ((WL *)&anfds[fd].head, (WL)w);
595		776
596	++fdchangecnt;	777	fd_change (fd);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = fd;
599	}	778	}
600		779
601	void	780	void
602	evio_stop (struct ev_io *w)	781	ev_io_stop (struct ev_io *w)
603	{	782	{
		783	ev_clear_pending ((W)w);
604	if (!ev_is_active (w))	784	if (!ev_is_active (w))
605	return;	785	return;
606		786
607	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
608	ev_stop ((W)w);	788	ev_stop ((W)w);
609		789
610	++fdchangecnt;	790	fd_change (w->fd);
611	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
612	fdchanges [fdchangecnt - 1] = w->fd;
613	}	791	}
614		792
615	void	793	void
616	evtimer_start (struct ev_timer *w)	794	ev_timer_start (struct ev_timer *w)
617	{	795	{
		796	if (ev_is_active (w))
		797	return;
		798
		799	w->at += now;
		800
		801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		802
		803	ev_start ((W)w, ++timercnt);
		804	array_needsize (timers, timermax, timercnt, );
		805	timers [timercnt - 1] = w;
		806	upheap ((WT *)timers, timercnt - 1);
		807	}
		808
		809	void
		810	ev_timer_stop (struct ev_timer *w)
		811	{
		812	ev_clear_pending ((W)w);
618	if (ev_is_active (w))	813	if (!ev_is_active (w))
619	return;	814	return;
620		815
621	if (w->is_abs)	816	if (w->active < timercnt--)
		817	{
		818	timers [w->active - 1] = timers [timercnt];
		819	downheap ((WT *)timers, timercnt, w->active - 1);
622	{	820	}
623	/* this formula differs from the one in timer_reify becuse we do not round up */	821
		822	w->at = w->repeat;
		823
		824	ev_stop ((W)w);
		825	}
		826
		827	void
		828	ev_timer_again (struct ev_timer *w)
		829	{
		830	if (ev_is_active (w))
		831	{
624	if (w->repeat)	832	if (w->repeat)
		833	{
		834	w->at = now + w->repeat;
		835	downheap ((WT *)timers, timercnt, w->active - 1);
		836	}
		837	else
		838	ev_timer_stop (w);
		839	}
		840	else if (w->repeat)
		841	ev_timer_start (w);
		842	}
		843
		844	void
		845	ev_periodic_start (struct ev_periodic *w)
		846	{
		847	if (ev_is_active (w))
		848	return;
		849
		850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		851
		852	/* this formula differs from the one in periodic_reify because we do not always round up */
		853	if (w->interval)
625	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
626		855
627	ev_start ((W)w, ++atimercnt);	856	ev_start ((W)w, ++periodiccnt);
628	array_needsize (atimers, atimermax, atimercnt, );	857	array_needsize (periodics, periodicmax, periodiccnt, );
629	atimers [atimercnt - 1] = w;	858	periodics [periodiccnt - 1] = w;
630	upheap (atimers, atimercnt - 1);	859	upheap ((WT *)periodics, periodiccnt - 1);
631	}
632	else
633	{
634	w->at += now;
635
636	ev_start ((W)w, ++rtimercnt);
637	array_needsize (rtimers, rtimermax, rtimercnt, );
638	rtimers [rtimercnt - 1] = w;
639	upheap (rtimers, rtimercnt - 1);
640	}
641
642	}	860	}
643		861
644	void	862	void
645	evtimer_stop (struct ev_timer *w)	863	ev_periodic_stop (struct ev_periodic *w)
646	{	864	{
		865	ev_clear_pending ((W)w);
647	if (!ev_is_active (w))	866	if (!ev_is_active (w))
648	return;	867	return;
649		868
650	if (w->is_abs)
651	{
652	if (w->active < atimercnt--)	869	if (w->active < periodiccnt--)
653	{
654	atimers [w->active - 1] = atimers [atimercnt];
655	downheap (atimers, atimercnt, w->active - 1);
656	}
657	}	870	{
658	else	871	periodics [w->active - 1] = periodics [periodiccnt];
659	{	872	downheap ((WT *)periodics, periodiccnt, w->active - 1);
660	if (w->active < rtimercnt--)
661	{
662	rtimers [w->active - 1] = rtimers [rtimercnt];
663	downheap (rtimers, rtimercnt, w->active - 1);
664	}
665	}	873	}
666		874
667	ev_stop ((W)w);	875	ev_stop ((W)w);
668	}	876	}
669		877
670	void	878	void
671	evsignal_start (struct ev_signal *w)	879	ev_signal_start (struct ev_signal *w)
672	{	880	{
673	if (ev_is_active (w))	881	if (ev_is_active (w))
674	return;	882	return;
		883
		884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
675		885
676	ev_start ((W)w, 1);	886	ev_start ((W)w, 1);
677	array_needsize (signals, signalmax, w->signum, signals_init);	887	array_needsize (signals, signalmax, w->signum, signals_init);
678	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
679		889
…		…
686	sigaction (w->signum, &sa, 0);	896	sigaction (w->signum, &sa, 0);
687	}	897	}
688	}	898	}
689		899
690	void	900	void
691	evsignal_stop (struct ev_signal *w)	901	ev_signal_stop (struct ev_signal *w)
692	{	902	{
		903	ev_clear_pending ((W)w);
693	if (!ev_is_active (w))	904	if (!ev_is_active (w))
694	return;	905	return;
695		906
696	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
697	ev_stop ((W)w);	908	ev_stop ((W)w);
698		909
699	if (!signals [w->signum - 1].head)	910	if (!signals [w->signum - 1].head)
700	signal (w->signum, SIG_DFL);	911	signal (w->signum, SIG_DFL);
701	}	912	}
702		913
		914	void
703	void evidle_start (struct ev_idle *w)	915	ev_idle_start (struct ev_idle *w)
704	{	916	{
705	if (ev_is_active (w))	917	if (ev_is_active (w))
706	return;	918	return;
707		919
708	ev_start ((W)w, ++idlecnt);	920	ev_start ((W)w, ++idlecnt);
709	array_needsize (idles, idlemax, idlecnt, );	921	array_needsize (idles, idlemax, idlecnt, );
710	idles [idlecnt - 1] = w;	922	idles [idlecnt - 1] = w;
711	}	923	}
712		924
		925	void
713	void evidle_stop (struct ev_idle *w)	926	ev_idle_stop (struct ev_idle *w)
714	{	927	{
		928	ev_clear_pending ((W)w);
		929	if (ev_is_active (w))
		930	return;
		931
715	idles [w->active - 1] = idles [--idlecnt];	932	idles [w->active - 1] = idles [--idlecnt];
716	ev_stop ((W)w);	933	ev_stop ((W)w);
717	}	934	}
718		935
		936	void
		937	ev_prepare_start (struct ev_prepare *w)
		938	{
		939	if (ev_is_active (w))
		940	return;
		941
		942	ev_start ((W)w, ++preparecnt);
		943	array_needsize (prepares, preparemax, preparecnt, );
		944	prepares [preparecnt - 1] = w;
		945	}
		946
		947	void
		948	ev_prepare_stop (struct ev_prepare *w)
		949	{
		950	ev_clear_pending ((W)w);
		951	if (ev_is_active (w))
		952	return;
		953
		954	prepares [w->active - 1] = prepares [--preparecnt];
		955	ev_stop ((W)w);
		956	}
		957
		958	void
719	void evcheck_start (struct ev_check *w)	959	ev_check_start (struct ev_check *w)
720	{	960	{
721	if (ev_is_active (w))	961	if (ev_is_active (w))
722	return;	962	return;
723		963
724	ev_start ((W)w, ++checkcnt);	964	ev_start ((W)w, ++checkcnt);
725	array_needsize (checks, checkmax, checkcnt, );	965	array_needsize (checks, checkmax, checkcnt, );
726	checks [checkcnt - 1] = w;	966	checks [checkcnt - 1] = w;
727	}	967	}
728		968
		969	void
729	void evcheck_stop (struct ev_check *w)	970	ev_check_stop (struct ev_check *w)
730	{	971	{
		972	ev_clear_pending ((W)w);
		973	if (ev_is_active (w))
		974	return;
		975
731	checks [w->active - 1] = checks [--checkcnt];	976	checks [w->active - 1] = checks [--checkcnt];
732	ev_stop ((W)w);	977	ev_stop ((W)w);
733	}	978	}
734		979
		980	void
		981	ev_child_start (struct ev_child *w)
		982	{
		983	if (ev_is_active (w))
		984	return;
		985
		986	ev_start ((W)w, 1);
		987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		988	}
		989
		990	void
		991	ev_child_stop (struct ev_child *w)
		992	{
		993	ev_clear_pending ((W)w);
		994	if (ev_is_active (w))
		995	return;
		996
		997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		998	ev_stop ((W)w);
		999	}
		1000
		1001	/*****************************************************************************/
		1002
		1003	struct ev_once
		1004	{
		1005	struct ev_io io;
		1006	struct ev_timer to;
		1007	void (cb)(int revents, void arg);
		1008	void *arg;
		1009	};
		1010
		1011	static void
		1012	once_cb (struct ev_once *once, int revents)
		1013	{
		1014	void (cb)(int revents, void arg) = once->cb;
		1015	void *arg = once->arg;
		1016
		1017	ev_io_stop (&once->io);
		1018	ev_timer_stop (&once->to);
		1019	free (once);
		1020
		1021	cb (revents, arg);
		1022	}
		1023
		1024	static void
		1025	once_cb_io (struct ev_io *w, int revents)
		1026	{
		1027	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1028	}
		1029
		1030	static void
		1031	once_cb_to (struct ev_timer *w, int revents)
		1032	{
		1033	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1034	}
		1035
		1036	void
		1037	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1038	{
		1039	struct ev_once *once = malloc (sizeof (struct ev_once));
		1040
		1041	if (!once)
		1042	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1043	else
		1044	{
		1045	once->cb = cb;
		1046	once->arg = arg;
		1047
		1048	ev_watcher_init (&once->io, once_cb_io);
		1049	if (fd >= 0)
		1050	{
		1051	ev_io_set (&once->io, fd, events);
		1052	ev_io_start (&once->io);
		1053	}
		1054
		1055	ev_watcher_init (&once->to, once_cb_to);
		1056	if (timeout >= 0.)
		1057	{
		1058	ev_timer_set (&once->to, timeout, 0.);
		1059	ev_timer_start (&once->to);
		1060	}
		1061	}
		1062	}
		1063
735	/*****************************************************************************/	1064	/*****************************************************************************/
736		1065
737	#if 0	1066	#if 0
738		1067
		1068	struct ev_io wio;
		1069
739	static void	1070	static void
740	sin_cb (struct ev_io *w, int revents)	1071	sin_cb (struct ev_io *w, int revents)
741	{	1072	{
742	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
743	}	1074	}
744		1075
745	static void	1076	static void
746	ocb (struct ev_timer *w, int revents)	1077	ocb (struct ev_timer *w, int revents)
747	{	1078	{
748	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
749	evtimer_stop (w);	1080	ev_timer_stop (w);
750	evtimer_start (w);	1081	ev_timer_start (w);
751	}	1082	}
752		1083
753	static void	1084	static void
754	scb (struct ev_signal *w, int revents)	1085	scb (struct ev_signal *w, int revents)
755	{	1086	{
756	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1088	ev_io_stop (&wio);
		1089	ev_io_start (&wio);
757	}	1090	}
758		1091
759	static void	1092	static void
760	gcb (struct ev_signal *w, int revents)	1093	gcb (struct ev_signal *w, int revents)
761	{	1094	{
762	fprintf (stderr, "generic %x\n", revents);	1095	fprintf (stderr, "generic %x\n", revents);
		1096
763	}	1097	}
764		1098
765	int main (void)	1099	int main (void)
766	{	1100	{
767	struct ev_io sin;
768
769	ev_init (0);	1101	ev_init (0);
770		1102
771	evw_init (&sin, sin_cb, 55);
772	evio_set (&sin, 0, EV_READ);	1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
773	evio_start (&sin);	1104	ev_io_start (&wio);
774		1105
775	struct ev_timer t[10000];	1106	struct ev_timer t[10000];
776		1107
777	#if 0	1108	#if 0
778	int i;	1109	int i;
779	for (i = 0; i < 10000; ++i)	1110	for (i = 0; i < 10000; ++i)
780	{	1111	{
781	struct ev_timer *w = t + i;	1112	struct ev_timer *w = t + i;
782	evw_init (w, ocb, i);	1113	ev_watcher_init (w, ocb, i);
783	evtimer_set_abs (w, drand48 (), 0.99775533);	1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
784	evtimer_start (w);	1115	ev_timer_start (w);
785	if (drand48 () < 0.5)	1116	if (drand48 () < 0.5)
786	evtimer_stop (w);	1117	ev_timer_stop (w);
787	}	1118	}
788	#endif	1119	#endif
789		1120
790	struct ev_timer t1;	1121	struct ev_timer t1;
791	evw_init (&t1, ocb, 0);	1122	ev_timer_init (&t1, ocb, 5, 10);
792	evtimer_set_abs (&t1, 5, 10);
793	evtimer_start (&t1);	1123	ev_timer_start (&t1);
794		1124
795	struct ev_signal sig;	1125	struct ev_signal sig;
796	evw_init (&sig, scb, 65535);
797	evsignal_set (&sig, SIGQUIT);	1126	ev_signal_init (&sig, scb, SIGQUIT);
798	evsignal_start (&sig);	1127	ev_signal_start (&sig);
799		1128
800	struct ev_check cw;	1129	struct ev_check cw;
801	evw_init (&cw, gcb, 0);	1130	ev_check_init (&cw, gcb);
802	evcheck_start (&cw);	1131	ev_check_start (&cw);
803		1132
804	struct ev_idle iw;	1133	struct ev_idle iw;
805	evw_init (&iw, gcb, 0);	1134	ev_idle_init (&iw, gcb);
806	evidle_start (&iw);	1135	ev_idle_start (&iw);
807		1136
808	ev_loop (0);	1137	ev_loop (0);
809		1138
810	return 0;	1139	return 0;
811	}	1140	}

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Comparing libev/ev.c (file contents): Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs. Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC