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

Comparing libev/ev.c (file contents):
Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs.
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC

…		…
1	#include <math.h>	1	#include <math.h>
2	#include <stdlib.h>	2	#include <stdlib.h>
		3	#include <unistd.h>
		4	#include <fcntl.h>
		5	#include <signal.h>
		6	#include <stddef.h>
3		7
4	#include <stdio.h>	8	#include <stdio.h>
5		9
		10	#include <assert.h>
6	#include <errno.h>	11	#include <errno.h>
7	#include <sys/time.h>	12	#include <sys/time.h>
8	#include <time.h>	13	#include <time.h>
9		14
10	#ifdef CLOCK_MONOTONIC
11	# define HAVE_MONOTONIC 1
12	#endif
13
14	#define HAVE_EPOLL 1	15	#define HAVE_EPOLL 1
15	#define HAVE_REALTIME 1	16
		17	#ifndef HAVE_MONOTONIC
		18	# ifdef CLOCK_MONOTONIC
		19	# define HAVE_MONOTONIC 1
		20	# endif
		21	#endif
		22
		23	#ifndef HAVE_SELECT
16	#define HAVE_SELECT 0	24	# define HAVE_SELECT 1
		25	#endif
17		26
		27	#ifndef HAVE_EPOLL
		28	# define HAVE_EPOLL 0
		29	#endif
		30
		31	#ifndef HAVE_REALTIME
		32	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */
		33	#endif
		34
		35	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
18	#define MAX_BLOCKTIME 60.	36	#define MAX_BLOCKTIME 60.
19		37
20	#include "ev.h"	38	#include "ev.h"
21		39
22	struct ev_watcher {	40	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);
24	};
25
26	struct ev_watcher_list {	41	typedef struct ev_watcher_list *WL;
27	EV_WATCHER_LIST (ev_watcher_list);	42	typedef struct ev_watcher_time *WT;
28	};
29		43
		44	static ev_tstamp now, diff; /* monotonic clock */
30	ev_tstamp ev_now;	45	ev_tstamp ev_now;
31	int ev_method;	46	int ev_method;
32		47
33	static int have_monotonic; /* runtime */	48	static int have_monotonic; /* runtime */
34		49
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	50	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
36	static void (*method_reify)(void);	51	static void (*method_modify)(int fd, int oev, int nev);
37	static void (*method_poll)(ev_tstamp timeout);	52	static void (*method_poll)(ev_tstamp timeout);
		53
		54	/*****************************************************************************/
38		55
39	ev_tstamp	56	ev_tstamp
40	ev_time (void)	57	ev_time (void)
41	{	58	{
42	#if HAVE_REALTIME	59	#if HAVE_REALTIME
67		84
68	#define array_needsize(base,cur,cnt,init) \	85	#define array_needsize(base,cur,cnt,init) \
69	if ((cnt) > cur) \	86	if ((cnt) > cur) \
70	{ \	87	{ \
71	int newcnt = cur ? cur << 1 : 16; \	88	int newcnt = cur ? cur << 1 : 16; \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\
73	base = realloc (base, sizeof (base) (newcnt)); \	89	base = realloc (base, sizeof (base) (newcnt)); \
74	init (base + cur, newcnt - cur); \	90	init (base + cur, newcnt - cur); \
75	cur = newcnt; \	91	cur = newcnt; \
76	}	92	}
77		93
		94	/*****************************************************************************/
		95
78	typedef struct	96	typedef struct
79	{	97	{
80	struct ev_io *head;	98	struct ev_io *head;
81	unsigned char wev, rev; /* want, received event set */	99	unsigned char wev, rev; /* want, received event set */
82	} ANFD;	100	} ANFD;
…		…
98	}	116	}
99	}	117	}
100		118
101	typedef struct	119	typedef struct
102	{	120	{
103	struct ev_watcher *w;	121	W w;
104	int events;	122	int events;
105	} ANPENDING;	123	} ANPENDING;
106		124
107	static ANPENDING *pendings;	125	static ANPENDING *pendings;
108	static int pendingmax, pendingcnt;	126	static int pendingmax, pendingcnt;
109		127
110	static void	128	static void
111	event (struct ev_watcher *w, int events)	129	event (W w, int events)
112	{	130	{
		131	if (w->active)
		132	{
113	w->pending = ++pendingcnt;	133	w->pending = ++pendingcnt;
114	array_needsize (pendings, pendingmax, pendingcnt, );	134	array_needsize (pendings, pendingmax, pendingcnt, );
115	pendings [pendingcnt - 1].w = w;	135	pendings [pendingcnt - 1].w = w;
116	pendings [pendingcnt - 1].events = events;	136	pendings [pendingcnt - 1].events = events;
		137	}
117	}	138	}
118		139
119	static void	140	static void
120	fd_event (int fd, int events)	141	fd_event (int fd, int events)
121	{	142	{
…		…
125	for (w = anfd->head; w; w = w->next)	146	for (w = anfd->head; w; w = w->next)
126	{	147	{
127	int ev = w->events & events;	148	int ev = w->events & events;
128		149
129	if (ev)	150	if (ev)
130	event ((struct ev_watcher *)w, ev);	151	event ((W)w, ev);
131	}	152	}
132	}	153	}
		154
		155	static void
		156	queue_events (W *events, int eventcnt, int type)
		157	{
		158	int i;
		159
		160	for (i = 0; i < eventcnt; ++i)
		161	event (events [i], type);
		162	}
		163
		164	/*****************************************************************************/
133		165
134	static struct ev_timer **timers;	166	static struct ev_timer **timers;
135	static int timermax, timercnt;	167	static int timermax, timercnt;
136		168
		169	static struct ev_periodic **periodics;
		170	static int periodicmax, periodiccnt;
		171
137	static void	172	static void
138	upheap (int k)	173	upheap (WT *timers, int k)
139	{	174	{
140	struct ev_timer *w = timers [k];	175	WT w = timers [k];
141		176
142	while (k && timers [k >> 1]->at > w->at)	177	while (k && timers [k >> 1]->at > w->at)
143	{	178	{
144	timers [k] = timers [k >> 1];	179	timers [k] = timers [k >> 1];
145	timers [k]->active = k + 1;	180	timers [k]->active = k + 1;
…		…
150	timers [k]->active = k + 1;	185	timers [k]->active = k + 1;
151		186
152	}	187	}
153		188
154	static void	189	static void
155	downheap (int k)	190	downheap (WT *timers, int N, int k)
156	{	191	{
157	struct ev_timer *w = timers [k];	192	WT w = timers [k];
158		193
159	while (k < (timercnt >> 1))	194	while (k < (N >> 1))
160	{	195	{
161	int j = k << 1;	196	int j = k << 1;
162		197
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	198	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
164	++j;	199	++j;
165		200
166	if (w->at <= timers [j]->at)	201	if (w->at <= timers [j]->at)
167	break;	202	break;
168		203
…		…
173		208
174	timers [k] = w;	209	timers [k] = w;
175	timers [k]->active = k + 1;	210	timers [k]->active = k + 1;
176	}	211	}
177		212
178	static struct ev_signal **signals;	213	/*****************************************************************************/
		214
		215	typedef struct
		216	{
		217	struct ev_signal *head;
		218	sig_atomic_t gotsig;
		219	} ANSIG;
		220
		221	static ANSIG *signals;
179	static int signalmax, signalcnt;	222	static int signalmax;
180		223
		224	static int sigpipe [2];
		225	static sig_atomic_t gotsig;
		226	static struct ev_io sigev;
		227
181	static void	228	static void
182	signals_init (struct ev_signal **base, int count)	229	signals_init (ANSIG *base, int count)
183	{	230	{
184	while (count--)	231	while (count--)
185	*base++ = 0;	232	{
		233	base->head = 0;
		234	base->gotsig = 0;
		235	++base;
		236	}
186	}	237	}
		238
		239	static void
		240	sighandler (int signum)
		241	{
		242	signals [signum - 1].gotsig = 1;
		243
		244	if (!gotsig)
		245	{
		246	gotsig = 1;
		247	write (sigpipe [1], &gotsig, 1);
		248	}
		249	}
		250
		251	static void
		252	sigcb (struct ev_io *iow, int revents)
		253	{
		254	struct ev_signal *w;
		255	int sig;
		256
		257	gotsig = 0;
		258	read (sigpipe [0], &revents, 1);
		259
		260	for (sig = signalmax; sig--; )
		261	if (signals [sig].gotsig)
		262	{
		263	signals [sig].gotsig = 0;
		264
		265	for (w = signals [sig].head; w; w = w->next)
		266	event ((W)w, EV_SIGNAL);
		267	}
		268	}
		269
		270	static void
		271	siginit (void)
		272	{
		273	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		274	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		275
		276	/* rather than sort out wether we really need nb, set it */
		277	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		278	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		279
		280	evio_set (&sigev, sigpipe [0], EV_READ);
		281	evio_start (&sigev);
		282	}
		283
		284	/*****************************************************************************/
		285
		286	static struct ev_idle **idles;
		287	static int idlemax, idlecnt;
		288
		289	static struct ev_check **checks;
		290	static int checkmax, checkcnt;
		291
		292	/*****************************************************************************/
187		293
188	#if HAVE_EPOLL	294	#if HAVE_EPOLL
189	# include "ev_epoll.c"	295	# include "ev_epoll.c"
190	#endif	296	#endif
191	#if HAVE_SELECT	297	#if HAVE_SELECT
…		…
201	have_monotonic = 1;	307	have_monotonic = 1;
202	}	308	}
203	#endif	309	#endif
204		310
205	ev_now = ev_time ();	311	ev_now = ev_time ();
		312	now = get_clock ();
		313	diff = ev_now - now;
206		314
		315	if (pipe (sigpipe))
		316	return 0;
		317
		318	ev_method = EVMETHOD_NONE;
207	#if HAVE_EPOLL	319	#if HAVE_EPOLL
208	if (epoll_init (flags))	320	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
209	return ev_method;
210	#endif	321	#endif
211	#if HAVE_SELECT	322	#if HAVE_SELECT
212	if (select_init (flags))	323	if (ev_method == EVMETHOD_NONE) select_init (flags);
213	return ev_method;
214	#endif	324	#endif
215		325
216	ev_method = EVMETHOD_NONE;	326	if (ev_method)
		327	{
		328	evw_init (&sigev, sigcb);
		329	siginit ();
		330	}
		331
217	return ev_method;	332	return ev_method;
218	}	333	}
219		334
		335	/*****************************************************************************/
		336
220	void ev_prefork (void)	337	void ev_prefork (void)
221	{	338	{
		339	/* nop */
222	}	340	}
223		341
224	void ev_postfork_parent (void)	342	void ev_postfork_parent (void)
225	{	343	{
		344	/* nop */
226	}	345	}
227		346
228	void ev_postfork_child (void)	347	void ev_postfork_child (void)
229	{	348	{
230	#if HAVE_EPOLL	349	#if HAVE_EPOLL
		350	if (ev_method == EVMETHOD_EPOLL)
231	epoll_postfork_child ();	351	epoll_postfork_child ();
232	#endif	352	#endif
		353
		354	evio_stop (&sigev);
		355	close (sigpipe [0]);
		356	close (sigpipe [1]);
		357	pipe (sigpipe);
		358	siginit ();
		359	}
		360
		361	/*****************************************************************************/
		362
		363	static void
		364	fd_reify (void)
		365	{
		366	int i;
		367
		368	for (i = 0; i < fdchangecnt; ++i)
		369	{
		370	int fd = fdchanges [i];
		371	ANFD *anfd = anfds + fd;
		372	struct ev_io *w;
		373
		374	int wev = 0;
		375
		376	for (w = anfd->head; w; w = w->next)
		377	wev \|= w->events;
		378
		379	if (anfd->wev != wev)
		380	{
		381	method_modify (fd, anfd->wev, wev);
		382	anfd->wev = wev;
		383	}
		384	}
		385
		386	fdchangecnt = 0;
233	}	387	}
234		388
235	static void	389	static void
236	call_pending ()	390	call_pending ()
237	{	391	{
…		…
250		404
251	pendingcnt = 0;	405	pendingcnt = 0;
252	}	406	}
253		407
254	static void	408	static void
255	timer_reify (void)	409	timers_reify ()
256	{	410	{
257	while (timercnt && timers [0]->at <= ev_now)	411	while (timercnt && timers [0]->at <= now)
258	{	412	{
259	struct ev_timer *w = timers [0];	413	struct ev_timer *w = timers [0];
260		414
		415	event ((W)w, EV_TIMEOUT);
		416
261	/* first reschedule timer */	417	/* first reschedule or stop timer */
262	if (w->repeat)	418	if (w->repeat)
263	{	419	{
264	if (w->is_abs)
265	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
266	else
267	w->at = ev_now + w->repeat;	420	w->at = now + w->repeat;
268		421	assert (("timer timeout in the past, negative repeat?", w->at > now));
269	downheap (0);	422	downheap ((WT *)timers, timercnt, 0);
270	}	423	}
271	else	424	else
272	evtimer_stop (w); /* nonrepeating: stop timer */	425	evtimer_stop (w); /* nonrepeating: stop timer */
		426	}
		427	}
273		428
		429	static void
		430	periodics_reify ()
		431	{
		432	while (periodiccnt && periodics [0]->at <= ev_now)
		433	{
		434	struct ev_periodic *w = periodics [0];
		435
		436	/* first reschedule or stop timer */
		437	if (w->interval)
		438	{
		439	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		440	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));
		441	downheap ((WT *)periodics, periodiccnt, 0);
		442	}
		443	else
		444	evperiodic_stop (w); /* nonrepeating: stop timer */
		445
274	event ((struct ev_watcher *)w, EV_TIMEOUT);	446	event ((W)w, EV_TIMEOUT);
		447	}
		448	}
		449
		450	static void
		451	periodics_reschedule (ev_tstamp diff)
		452	{
		453	int i;
		454
		455	/* adjust periodics after time jump */
		456	for (i = 0; i < periodiccnt; ++i)
		457	{
		458	struct ev_periodic *w = periodics [i];
		459
		460	if (w->interval)
		461	{
		462	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		463
		464	if (fabs (diff) >= 1e-4)
		465	{
		466	evperiodic_stop (w);
		467	evperiodic_start (w);
		468
		469	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		470	}
		471	}
		472	}
		473	}
		474
		475	static void
		476	time_update ()
		477	{
		478	int i;
		479
		480	ev_now = ev_time ();
		481
		482	if (have_monotonic)
		483	{
		484	ev_tstamp odiff = diff;
		485
		486	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		487	{
		488	now = get_clock ();
		489	diff = ev_now - now;
		490
		491	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		492	return; /* all is well */
		493
		494	ev_now = ev_time ();
		495	}
		496
		497	periodics_reschedule (diff - odiff);
		498	/* no timer adjustment, as the monotonic clock doesn't jump */
		499	}
		500	else
		501	{
		502	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
		503	{
		504	periodics_reschedule (ev_now - now);
		505
		506	/* adjust timers. this is easy, as the offset is the same for all */
		507	for (i = 0; i < timercnt; ++i)
		508	timers [i]->at += diff;
		509	}
		510
		511	now = ev_now;
275	}	512	}
276	}	513	}
277		514
278	int ev_loop_done;	515	int ev_loop_done;
279		516
280	int ev_loop (int flags)	517	void ev_loop (int flags)
281	{	518	{
282	double block;	519	double block;
283	ev_loop_done = flags & EVLOOP_ONESHOT;	520	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
		521
		522	if (checkcnt)
		523	{
		524	queue_events ((W *)checks, checkcnt, EV_CHECK);
		525	call_pending ();
		526	}
284		527
285	do	528	do
286	{	529	{
287	/* update fd-related kernel structures */	530	/* update fd-related kernel structures */
288	method_reify (); fdchangecnt = 0;	531	fd_reify ();
289		532
290	/* calculate blocking time */	533	/* calculate blocking time */
		534
		535	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
291	ev_now = ev_time ();	536	ev_now = ev_time ();
292		537
293	if (flags & EVLOOP_NONBLOCK)	538	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
294	block = 0.;	539	block = 0.;
295	else if (!timercnt)
296	block = MAX_BLOCKTIME;
297	else	540	else
298	{	541	{
		542	block = MAX_BLOCKTIME;
		543
		544	if (timercnt)
		545	{
		546	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
		547	if (block > to) block = to;
		548	}
		549
		550	if (periodiccnt)
		551	{
299	block = timers [0]->at - ev_now + method_fudge;	552	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
		553	if (block > to) block = to;
		554	}
		555
300	if (block < 0.) block = 0.;	556	if (block < 0.) block = 0.;
301	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
302	}	557	}
303		558
304	method_poll (block);	559	method_poll (block);
305		560
		561	/* update ev_now, do magic */
		562	time_update ();
		563
306	/* put pending timers into pendign queue and reschedule them */	564	/* queue pending timers and reschedule them */
307	timer_reify ();	565	periodics_reify (); /* absolute timers first */
		566	timers_reify (); /* relative timers second */
308		567
309	ev_now = ev_time ();	568	/* queue idle watchers unless io or timers are pending */
		569	if (!pendingcnt)
		570	queue_events ((W *)idles, idlecnt, EV_IDLE);
		571
		572	/* queue check and possibly idle watchers */
		573	queue_events ((W *)checks, checkcnt, EV_CHECK);
		574
310	call_pending ();	575	call_pending ();
311	}	576	}
312	while (!ev_loop_done);	577	while (!ev_loop_done);
313	}
314		578
		579	if (ev_loop_done != 2)
		580	ev_loop_done = 0;
		581	}
		582
		583	/*****************************************************************************/
		584
315	static void	585	static void
316	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	586	wlist_add (WL *head, WL elem)
317	{	587	{
318	elem->next = *head;	588	elem->next = *head;
319	*head = elem;	589	*head = elem;
320	}	590	}
321		591
322	static void	592	static void
323	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	593	wlist_del (WL *head, WL elem)
324	{	594	{
325	while (*head)	595	while (*head)
326	{	596	{
327	if (*head == elem)	597	if (*head == elem)
328	{	598	{
…		…
333	head = &(*head)->next;	603	head = &(*head)->next;
334	}	604	}
335	}	605	}
336		606
337	static void	607	static void
338	ev_start (struct ev_watcher *w, int active)	608	ev_clear (W w)
339	{	609	{
		610	if (w->pending)
		611	{
		612	pendings [w->pending - 1].w = 0;
340	w->pending = 0;	613	w->pending = 0;
		614	}
		615	}
		616
		617	static void
		618	ev_start (W w, int active)
		619	{
341	w->active = active;	620	w->active = active;
342	}	621	}
343		622
344	static void	623	static void
345	ev_stop (struct ev_watcher *w)	624	ev_stop (W w)
346	{	625	{
347	if (w->pending)
348	pendings [w->pending - 1].w = 0;
349
350	w->active = 0;	626	w->active = 0;
351	/* nop */
352	}	627	}
		628
		629	/*****************************************************************************/
353		630
354	void	631	void
355	evio_start (struct ev_io *w)	632	evio_start (struct ev_io *w)
356	{	633	{
357	if (ev_is_active (w))	634	if (ev_is_active (w))
358	return;	635	return;
359		636
360	int fd = w->fd;	637	int fd = w->fd;
361		638
362	ev_start ((struct ev_watcher *)w, 1);	639	ev_start ((W)w, 1);
363	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	640	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
364	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	641	wlist_add ((WL *)&anfds[fd].head, (WL)w);
365		642
366	++fdchangecnt;	643	++fdchangecnt;
367	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	644	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
368	fdchanges [fdchangecnt - 1] = fd;	645	fdchanges [fdchangecnt - 1] = fd;
369	}	646	}
370		647
371	void	648	void
372	evio_stop (struct ev_io *w)	649	evio_stop (struct ev_io *w)
373	{	650	{
		651	ev_clear ((W)w);
374	if (!ev_is_active (w))	652	if (!ev_is_active (w))
375	return;	653	return;
376		654
377	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	655	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
378	ev_stop ((struct ev_watcher *)w);	656	ev_stop ((W)w);
379		657
380	++fdchangecnt;	658	++fdchangecnt;
381	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	659	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
382	fdchanges [fdchangecnt - 1] = w->fd;	660	fdchanges [fdchangecnt - 1] = w->fd;
383	}	661	}
…		…
386	evtimer_start (struct ev_timer *w)	664	evtimer_start (struct ev_timer *w)
387	{	665	{
388	if (ev_is_active (w))	666	if (ev_is_active (w))
389	return;	667	return;
390		668
391	if (w->is_abs)
392	{
393	/* this formula differs from the one in timer_reify becuse we do not round up */
394	if (w->repeat)
395	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
396	}
397	else
398	w->at += ev_now;	669	w->at += now;
399		670
400	ev_start ((struct ev_watcher *)w, ++timercnt);	671	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
		672
		673	ev_start ((W)w, ++timercnt);
401	array_needsize (timers, timermax, timercnt, );	674	array_needsize (timers, timermax, timercnt, );
402	timers [timercnt - 1] = w;	675	timers [timercnt - 1] = w;
403	upheap (timercnt - 1);	676	upheap ((WT *)timers, timercnt - 1);
404	}	677	}
405		678
406	void	679	void
407	evtimer_stop (struct ev_timer *w)	680	evtimer_stop (struct ev_timer *w)
408	{	681	{
		682	ev_clear ((W)w);
409	if (!ev_is_active (w))	683	if (!ev_is_active (w))
410	return;	684	return;
411		685
412	if (w->active < timercnt--)	686	if (w->active < timercnt--)
413	{	687	{
414	timers [w->active - 1] = timers [timercnt];	688	timers [w->active - 1] = timers [timercnt];
415	downheap (w->active - 1);	689	downheap ((WT *)timers, timercnt, w->active - 1);
		690	}
		691
		692	w->at = w->repeat;
		693
		694	ev_stop ((W)w);
		695	}
		696
		697	void
		698	evtimer_again (struct ev_timer *w)
		699	{
		700	if (ev_is_active (w))
416	}	701	{
		702	if (w->repeat)
		703	{
		704	w->at = now + w->repeat;
		705	downheap ((WT *)timers, timercnt, w->active - 1);
		706	}
		707	else
		708	evtimer_stop (w);
		709	}
		710	else if (w->repeat)
		711	evtimer_start (w);
		712	}
417		713
418	ev_stop ((struct ev_watcher *)w);	714	void
		715	evperiodic_start (struct ev_periodic *w)
		716	{
		717	if (ev_is_active (w))
		718	return;
		719
		720	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
		721
		722	/* this formula differs from the one in periodic_reify because we do not always round up */
		723	if (w->interval)
		724	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
		725
		726	ev_start ((W)w, ++periodiccnt);
		727	array_needsize (periodics, periodicmax, periodiccnt, );
		728	periodics [periodiccnt - 1] = w;
		729	upheap ((WT *)periodics, periodiccnt - 1);
		730	}
		731
		732	void
		733	evperiodic_stop (struct ev_periodic *w)
		734	{
		735	ev_clear ((W)w);
		736	if (!ev_is_active (w))
		737	return;
		738
		739	if (w->active < periodiccnt--)
		740	{
		741	periodics [w->active - 1] = periodics [periodiccnt];
		742	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		743	}
		744
		745	ev_stop ((W)w);
419	}	746	}
420		747
421	void	748	void
422	evsignal_start (struct ev_signal *w)	749	evsignal_start (struct ev_signal *w)
423	{	750	{
424	if (ev_is_active (w))	751	if (ev_is_active (w))
425	return;	752	return;
426		753
427	ev_start ((struct ev_watcher *)w, 1);	754	ev_start ((W)w, 1);
428	array_needsize (signals, signalmax, w->signum, signals_init);	755	array_needsize (signals, signalmax, w->signum, signals_init);
429	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		757
		758	if (!w->next)
		759	{
		760	struct sigaction sa;
		761	sa.sa_handler = sighandler;
		762	sigfillset (&sa.sa_mask);
		763	sa.sa_flags = 0;
		764	sigaction (w->signum, &sa, 0);
		765	}
430	}	766	}
431		767
432	void	768	void
433	evsignal_stop (struct ev_signal *w)	769	evsignal_stop (struct ev_signal *w)
434	{	770	{
		771	ev_clear ((W)w);
435	if (!ev_is_active (w))	772	if (!ev_is_active (w))
436	return;	773	return;
437		774
438	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
439	ev_stop ((struct ev_watcher *)w);	776	ev_stop ((W)w);
440	}
441		777
		778	if (!signals [w->signum - 1].head)
		779	signal (w->signum, SIG_DFL);
		780	}
		781
		782	void evidle_start (struct ev_idle *w)
		783	{
		784	if (ev_is_active (w))
		785	return;
		786
		787	ev_start ((W)w, ++idlecnt);
		788	array_needsize (idles, idlemax, idlecnt, );
		789	idles [idlecnt - 1] = w;
		790	}
		791
		792	void evidle_stop (struct ev_idle *w)
		793	{
		794	ev_clear ((W)w);
		795	if (ev_is_active (w))
		796	return;
		797
		798	idles [w->active - 1] = idles [--idlecnt];
		799	ev_stop ((W)w);
		800	}
		801
		802	void evcheck_start (struct ev_check *w)
		803	{
		804	if (ev_is_active (w))
		805	return;
		806
		807	ev_start ((W)w, ++checkcnt);
		808	array_needsize (checks, checkmax, checkcnt, );
		809	checks [checkcnt - 1] = w;
		810	}
		811
		812	void evcheck_stop (struct ev_check *w)
		813	{
		814	ev_clear ((W)w);
		815	if (ev_is_active (w))
		816	return;
		817
		818	checks [w->active - 1] = checks [--checkcnt];
		819	ev_stop ((W)w);
		820	}
		821
442	/*****************************************************************************/	822	/*****************************************************************************/
		823
		824	struct ev_once
		825	{
		826	struct ev_io io;
		827	struct ev_timer to;
		828	void (cb)(int revents, void arg);
		829	void *arg;
		830	};
		831
		832	static void
		833	once_cb (struct ev_once *once, int revents)
		834	{
		835	void (cb)(int revents, void arg) = once->cb;
		836	void *arg = once->arg;
		837
		838	evio_stop (&once->io);
		839	evtimer_stop (&once->to);
		840	free (once);
		841
		842	cb (revents, arg);
		843	}
		844
		845	static void
		846	once_cb_io (struct ev_io *w, int revents)
		847	{
		848	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		849	}
		850
		851	static void
		852	once_cb_to (struct ev_timer *w, int revents)
		853	{
		854	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		855	}
		856
		857	void
		858	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		859	{
		860	struct ev_once *once = malloc (sizeof (struct ev_once));
		861
		862	if (!once)
		863	cb (EV_ERROR, arg);
		864	else
		865	{
		866	once->cb = cb;
		867	once->arg = arg;
		868
		869	evw_init (&once->io, once_cb_io);
		870
		871	if (fd >= 0)
		872	{
		873	evio_set (&once->io, fd, events);
		874	evio_start (&once->io);
		875	}
		876
		877	evw_init (&once->to, once_cb_to);
		878
		879	if (timeout >= 0.)
		880	{
		881	evtimer_set (&once->to, timeout, 0.);
		882	evtimer_start (&once->to);
		883	}
		884	}
		885	}
		886
		887	/*****************************************************************************/
		888
443	#if 1	889	#if 0
		890
		891	struct ev_io wio;
444		892
445	static void	893	static void
446	sin_cb (struct ev_io *w, int revents)	894	sin_cb (struct ev_io *w, int revents)
447	{	895	{
448	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	896	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
449	}	897	}
450		898
451	static void	899	static void
452	ocb (struct ev_timer *w, int revents)	900	ocb (struct ev_timer *w, int revents)
453	{	901	{
454	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	902	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
		903	evtimer_stop (w);
		904	evtimer_start (w);
		905	}
		906
		907	static void
		908	scb (struct ev_signal *w, int revents)
		909	{
		910	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		911	evio_stop (&wio);
		912	evio_start (&wio);
		913	}
		914
		915	static void
		916	gcb (struct ev_signal *w, int revents)
		917	{
		918	fprintf (stderr, "generic %x\n", revents);
		919
455	}	920	}
456		921
457	int main (void)	922	int main (void)
458	{	923	{
459	struct ev_io sin;
460
461	ev_init (0);	924	ev_init (0);
462		925
463	evw_init (&sin, sin_cb, 55);
464	evio_set (&sin, 0, EV_READ);	926	evio_init (&wio, sin_cb, 0, EV_READ);
465	evio_start (&sin);	927	evio_start (&wio);
466		928
467	struct ev_timer t[1000];	929	struct ev_timer t[10000];
468		930
		931	#if 0
469	int i;	932	int i;
470	for (i = 0; i < 1000; ++i)	933	for (i = 0; i < 10000; ++i)
471	{	934	{
472	struct ev_timer *w = t + i;	935	struct ev_timer *w = t + i;
473	evw_init (w, ocb, i);	936	evw_init (w, ocb, i);
474	evtimer_set_rel (w, drand48 (), 0);	937	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
475	evtimer_start (w);	938	evtimer_start (w);
476	if (drand48 () < 0.5)	939	if (drand48 () < 0.5)
477	evtimer_stop (w);	940	evtimer_stop (w);
478	}	941	}
		942	#endif
		943
		944	struct ev_timer t1;
		945	evtimer_init (&t1, ocb, 5, 10);
		946	evtimer_start (&t1);
		947
		948	struct ev_signal sig;
		949	evsignal_init (&sig, scb, SIGQUIT);
		950	evsignal_start (&sig);
		951
		952	struct ev_check cw;
		953	evcheck_init (&cw, gcb);
		954	evcheck_start (&cw);
		955
		956	struct ev_idle iw;
		957	evidle_init (&iw, gcb);
		958	evidle_start (&iw);
479		959
480	ev_loop (0);	960	ev_loop (0);
481		961
482	return 0;	962	return 0;
483	}	963	}

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Comparing libev/ev.c (file contents): Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs. Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs.
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC