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

Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 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>	3	#include <unistd.h>
4	#include <fcntl.h>	4	#include <fcntl.h>
5	#include <signal.h>	5	#include <signal.h>
		6	#include <stddef.h>
6		7
7	#include <stdio.h>	8	#include <stdio.h>
8		9
9	#include <assert.h>	10	#include <assert.h>
10	#include <errno.h>	11	#include <errno.h>
11	#include <sys/time.h>	12	#include <sys/time.h>
12	#include <time.h>	13	#include <time.h>
13		14
14	#ifdef CLOCK_MONOTONIC
15	# define HAVE_MONOTONIC 1
16	#endif
17
18	#define HAVE_REALTIME 1
19	#define HAVE_EPOLL 1	15	#define HAVE_EPOLL 1
		16
		17	#ifndef HAVE_MONOTONIC
		18	# ifdef CLOCK_MONOTONIC
		19	# define HAVE_MONOTONIC 1
		20	# endif
		21	#endif
		22
		23	#ifndef HAVE_SELECT
20	#define HAVE_SELECT 1	24	# define HAVE_SELECT 1
		25	#endif
		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
21		34
22	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	35	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23	#define MAX_BLOCKTIME 60.	36	#define MAX_BLOCKTIME 60.
24		37
25	#include "ev.h"	38	#include "ev.h"
26		39
27	struct ev_watcher {	40	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);
29	};
30
31	struct ev_watcher_list {	41	typedef struct ev_watcher_list *WL;
32	EV_WATCHER_LIST (ev_watcher_list);	42	typedef struct ev_watcher_time *WT;
33	};
34		43
35	static ev_tstamp now, diff; /* monotonic clock */	44	static ev_tstamp now, diff; /* monotonic clock */
36	ev_tstamp ev_now;	45	ev_tstamp ev_now;
37	int ev_method;	46	int ev_method;
38		47
39	static int have_monotonic; /* runtime */	48	static int have_monotonic; /* runtime */
40		49
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	50	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
42	static void (*method_modify)(int fd, int oev, int nev);	51	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);	52	static void (*method_poll)(ev_tstamp timeout);
		53
		54	/*****************************************************************************/
44		55
45	ev_tstamp	56	ev_tstamp
46	ev_time (void)	57	ev_time (void)
47	{	58	{
48	#if HAVE_REALTIME	59	#if HAVE_REALTIME
73		84
74	#define array_needsize(base,cur,cnt,init) \	85	#define array_needsize(base,cur,cnt,init) \
75	if ((cnt) > cur) \	86	if ((cnt) > cur) \
76	{ \	87	{ \
77	int newcnt = cur ? cur << 1 : 16; \	88	int newcnt = cur ? cur << 1 : 16; \
78	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\
79	base = realloc (base, sizeof (base) (newcnt)); \	89	base = realloc (base, sizeof (base) (newcnt)); \
80	init (base + cur, newcnt - cur); \	90	init (base + cur, newcnt - cur); \
81	cur = newcnt; \	91	cur = newcnt; \
82	}	92	}
83		93
		94	/*****************************************************************************/
		95
84	typedef struct	96	typedef struct
85	{	97	{
86	struct ev_io *head;	98	struct ev_io *head;
87	unsigned char wev, rev; /* want, received event set */	99	unsigned char wev, rev; /* want, received event set */
88	} ANFD;	100	} ANFD;
…		…
104	}	116	}
105	}	117	}
106		118
107	typedef struct	119	typedef struct
108	{	120	{
109	struct ev_watcher *w;	121	W w;
110	int events;	122	int events;
111	} ANPENDING;	123	} ANPENDING;
112		124
113	static ANPENDING *pendings;	125	static ANPENDING *pendings;
114	static int pendingmax, pendingcnt;	126	static int pendingmax, pendingcnt;
115		127
116	static void	128	static void
117	event (struct ev_watcher *w, int events)	129	event (W w, int events)
118	{	130	{
		131	if (w->active)
		132	{
119	w->pending = ++pendingcnt;	133	w->pending = ++pendingcnt;
120	array_needsize (pendings, pendingmax, pendingcnt, );	134	array_needsize (pendings, pendingmax, pendingcnt, );
121	pendings [pendingcnt - 1].w = w;	135	pendings [pendingcnt - 1].w = w;
122	pendings [pendingcnt - 1].events = events;	136	pendings [pendingcnt - 1].events = events;
		137	}
123	}	138	}
124		139
125	static void	140	static void
126	fd_event (int fd, int events)	141	fd_event (int fd, int events)
127	{	142	{
…		…
131	for (w = anfd->head; w; w = w->next)	146	for (w = anfd->head; w; w = w->next)
132	{	147	{
133	int ev = w->events & events;	148	int ev = w->events & events;
134		149
135	if (ev)	150	if (ev)
136	event ((struct ev_watcher *)w, ev);	151	event ((W)w, ev);
137	}	152	}
138	}	153	}
139		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	/*****************************************************************************/
		165
140	static struct ev_timer **atimers;	166	static struct ev_timer **timers;
141	static int atimermax, atimercnt;	167	static int timermax, timercnt;
142		168
143	static struct ev_timer **rtimers;	169	static struct ev_periodic **periodics;
144	static int rtimermax, rtimercnt;	170	static int periodicmax, periodiccnt;
145		171
146	static void	172	static void
147	upheap (struct ev_timer **timers, int k)	173	upheap (WT *timers, int k)
148	{	174	{
149	struct ev_timer *w = timers [k];	175	WT w = timers [k];
150		176
151	while (k && timers [k >> 1]->at > w->at)	177	while (k && timers [k >> 1]->at > w->at)
152	{	178	{
153	timers [k] = timers [k >> 1];	179	timers [k] = timers [k >> 1];
154	timers [k]->active = k + 1;	180	timers [k]->active = k + 1;
…		…
159	timers [k]->active = k + 1;	185	timers [k]->active = k + 1;
160		186
161	}	187	}
162		188
163	static void	189	static void
164	downheap (struct ev_timer **timers, int N, int k)	190	downheap (WT *timers, int N, int k)
165	{	191	{
166	struct ev_timer *w = timers [k];	192	WT w = timers [k];
167		193
168	while (k < (N >> 1))	194	while (k < (N >> 1))
169	{	195	{
170	int j = k << 1;	196	int j = k << 1;
171		197
…		…
181	}	207	}
182		208
183	timers [k] = w;	209	timers [k] = w;
184	timers [k]->active = k + 1;	210	timers [k]->active = k + 1;
185	}	211	}
		212
		213	/*****************************************************************************/
186		214
187	typedef struct	215	typedef struct
188	{	216	{
189	struct ev_signal *head;	217	struct ev_signal *head;
190	sig_atomic_t gotsig;	218	sig_atomic_t gotsig;
…		…
233	if (signals [sig].gotsig)	261	if (signals [sig].gotsig)
234	{	262	{
235	signals [sig].gotsig = 0;	263	signals [sig].gotsig = 0;
236		264
237	for (w = signals [sig].head; w; w = w->next)	265	for (w = signals [sig].head; w; w = w->next)
238	event ((struct ev_watcher *)w, EV_SIGNAL);	266	event ((W)w, EV_SIGNAL);
239	}	267	}
240	}	268	}
241		269
242	static void	270	static void
243	siginit (void)	271	siginit (void)
…		…
250	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	278	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
251		279
252	evio_set (&sigev, sigpipe [0], EV_READ);	280	evio_set (&sigev, sigpipe [0], EV_READ);
253	evio_start (&sigev);	281	evio_start (&sigev);
254	}	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	/*****************************************************************************/
255		293
256	#if HAVE_EPOLL	294	#if HAVE_EPOLL
257	# include "ev_epoll.c"	295	# include "ev_epoll.c"
258	#endif	296	#endif
259	#if HAVE_SELECT	297	#if HAVE_SELECT
…		…
285	if (ev_method == EVMETHOD_NONE) select_init (flags);	323	if (ev_method == EVMETHOD_NONE) select_init (flags);
286	#endif	324	#endif
287		325
288	if (ev_method)	326	if (ev_method)
289	{	327	{
290	evw_init (&sigev, sigcb, 0);	328	evw_init (&sigev, sigcb);
291	siginit ();	329	siginit ();
292	}	330	}
293		331
294	return ev_method;	332	return ev_method;
295	}	333	}
296		334
		335	/*****************************************************************************/
		336
297	void ev_prefork (void)	337	void ev_prefork (void)
298	{	338	{
		339	/* nop */
299	}	340	}
300		341
301	void ev_postfork_parent (void)	342	void ev_postfork_parent (void)
302	{	343	{
		344	/* nop */
303	}	345	}
304		346
305	void ev_postfork_child (void)	347	void ev_postfork_child (void)
306	{	348	{
307	#if HAVE_EPOLL	349	#if HAVE_EPOLL
…		…
314	close (sigpipe [1]);	356	close (sigpipe [1]);
315	pipe (sigpipe);	357	pipe (sigpipe);
316	siginit ();	358	siginit ();
317	}	359	}
318		360
		361	/*****************************************************************************/
		362
319	static void	363	static void
320	fd_reify (void)	364	fd_reify (void)
321	{	365	{
322	int i;	366	int i;
323		367
…		…
360		404
361	pendingcnt = 0;	405	pendingcnt = 0;
362	}	406	}
363		407
364	static void	408	static void
365	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	409	timers_reify ()
366	{	410	{
367	while (timercnt && timers [0]->at <= now)	411	while (timercnt && timers [0]->at <= now)
368	{	412	{
369	struct ev_timer *w = timers [0];	413	struct ev_timer *w = timers [0];
		414
		415	event ((W)w, EV_TIMEOUT);
370		416
371	/* first reschedule or stop timer */	417	/* first reschedule or stop timer */
372	if (w->repeat)	418	if (w->repeat)
373	{	419	{
374	if (w->is_abs)
375	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
376	else
377	w->at = now + w->repeat;	420	w->at = now + w->repeat;
378		421	assert (("timer timeout in the past, negative repeat?", w->at > now));
379	assert (w->at > now);
380
381	downheap (timers, timercnt, 0);	422	downheap ((WT *)timers, timercnt, 0);
382	}	423	}
383	else	424	else
384	{
385	evtimer_stop (w); /* nonrepeating: stop timer */	425	evtimer_stop (w); /* nonrepeating: stop timer */
386	--timercnt; /* maybe pass by reference instead? */	426	}
		427	}
		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)
387	}	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 */
388		445
389	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	}
390	}	472	}
391	}	473	}
392		474
393	static void	475	static void
394	time_update ()	476	time_update ()
395	{	477	{
396	int i;	478	int i;
		479
397	ev_now = ev_time ();	480	ev_now = ev_time ();
398		481
399	if (have_monotonic)	482	if (have_monotonic)
400	{	483	{
401	ev_tstamp odiff = diff;	484	ev_tstamp odiff = diff;
402		485
403	/* detecting time jumps is much more difficult */
404	for (i = 2; --i; ) /* loop a few times, before making important decisions */	486	for (i = 4; --i; ) /* loop a few times, before making important decisions */
405	{	487	{
406	now = get_clock ();	488	now = get_clock ();
407	diff = ev_now - now;	489	diff = ev_now - now;
408		490
409	if (fabs (odiff - diff) < MIN_TIMEJUMP)	491	if (fabs (odiff - diff) < MIN_TIMEJUMP)
410	return; /* all is well */	492	return; /* all is well */
411		493
412	ev_now = ev_time ();	494	ev_now = ev_time ();
413	}	495	}
414		496
415	/* time jump detected, reschedule atimers */	497	periodics_reschedule (diff - odiff);
416	for (i = 0; i < atimercnt; ++i)	498	/* no timer adjustment, as the monotonic clock doesn't jump */
417	{
418	struct ev_timer *w = atimers [i];
419	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
420	}
421	}	499	}
422	else	500	else
423	{	501	{
424	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	502	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
425	/* time jump detected, adjust rtimers */	503	{
		504	periodics_reschedule (ev_now - now);
		505
		506	/* adjust timers. this is easy, as the offset is the same for all */
426	for (i = 0; i < rtimercnt; ++i)	507	for (i = 0; i < timercnt; ++i)
427	rtimers [i]->at += ev_now - now;	508	timers [i]->at += diff;
		509	}
428		510
429	now = ev_now;	511	now = ev_now;
430	}	512	}
431	}	513	}
432		514
433	int ev_loop_done;	515	int ev_loop_done;
434		516
435	void ev_loop (int flags)	517	void ev_loop (int flags)
436	{	518	{
437	double block;	519	double block;
438	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	}
439		527
440	do	528	do
441	{	529	{
442	/* update fd-related kernel structures */	530	/* update fd-related kernel structures */
443	fd_reify ();	531	fd_reify ();
444		532
445	/* 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 */
		536	ev_now = ev_time ();
		537
446	if (flags & EVLOOP_NONBLOCK)	538	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
447	block = 0.;	539	block = 0.;
448	else	540	else
449	{	541	{
450	block = MAX_BLOCKTIME;	542	block = MAX_BLOCKTIME;
451		543
452	if (rtimercnt)	544	if (timercnt)
453	{	545	{
454	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	546	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
455	if (block > to) block = to;	547	if (block > to) block = to;
456	}	548	}
457		549
458	if (atimercnt)	550	if (periodiccnt)
459	{	551	{
460	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	552	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
461	if (block > to) block = to;	553	if (block > to) block = to;
462	}	554	}
463		555
464	if (block < 0.) block = 0.;	556	if (block < 0.) block = 0.;
465	}	557	}
…		…
467	method_poll (block);	559	method_poll (block);
468		560
469	/* update ev_now, do magic */	561	/* update ev_now, do magic */
470	time_update ();	562	time_update ();
471		563
472	/* put pending timers into pendign queue and reschedule them */	564	/* queue pending timers and reschedule them */
473	/* absolute timers first */	565	periodics_reify (); /* absolute timers first */
474	timers_reify (atimers, atimercnt, ev_now);
475	/* relative timers second */	566	timers_reify (); /* relative timers second */
476	timers_reify (rtimers, rtimercnt, now);	567
		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);
477		574
478	call_pending ();	575	call_pending ();
479	}	576	}
480	while (!ev_loop_done);	577	while (!ev_loop_done);
481	}
482		578
		579	if (ev_loop_done != 2)
		580	ev_loop_done = 0;
		581	}
		582
		583	/*****************************************************************************/
		584
483	static void	585	static void
484	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	586	wlist_add (WL *head, WL elem)
485	{	587	{
486	elem->next = *head;	588	elem->next = *head;
487	*head = elem;	589	*head = elem;
488	}	590	}
489		591
490	static void	592	static void
491	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	593	wlist_del (WL *head, WL elem)
492	{	594	{
493	while (*head)	595	while (*head)
494	{	596	{
495	if (*head == elem)	597	if (*head == elem)
496	{	598	{
…		…
501	head = &(*head)->next;	603	head = &(*head)->next;
502	}	604	}
503	}	605	}
504		606
505	static void	607	static void
506	ev_start (struct ev_watcher *w, int active)	608	ev_clear (W w)
507	{	609	{
		610	if (w->pending)
		611	{
		612	pendings [w->pending - 1].w = 0;
508	w->pending = 0;	613	w->pending = 0;
		614	}
		615	}
		616
		617	static void
		618	ev_start (W w, int active)
		619	{
509	w->active = active;	620	w->active = active;
510	}	621	}
511		622
512	static void	623	static void
513	ev_stop (struct ev_watcher *w)	624	ev_stop (W w)
514	{	625	{
515	if (w->pending)
516	pendings [w->pending - 1].w = 0;
517
518	w->active = 0;	626	w->active = 0;
519	/* nop */
520	}	627	}
		628
		629	/*****************************************************************************/
521		630
522	void	631	void
523	evio_start (struct ev_io *w)	632	evio_start (struct ev_io *w)
524	{	633	{
525	if (ev_is_active (w))	634	if (ev_is_active (w))
526	return;	635	return;
527		636
528	int fd = w->fd;	637	int fd = w->fd;
529		638
530	ev_start ((struct ev_watcher *)w, 1);	639	ev_start ((W)w, 1);
531	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	640	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
532	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	641	wlist_add ((WL *)&anfds[fd].head, (WL)w);
533		642
534	++fdchangecnt;	643	++fdchangecnt;
535	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	644	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536	fdchanges [fdchangecnt - 1] = fd;	645	fdchanges [fdchangecnt - 1] = fd;
537	}	646	}
538		647
539	void	648	void
540	evio_stop (struct ev_io *w)	649	evio_stop (struct ev_io *w)
541	{	650	{
		651	ev_clear ((W)w);
542	if (!ev_is_active (w))	652	if (!ev_is_active (w))
543	return;	653	return;
544		654
545	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);
546	ev_stop ((struct ev_watcher *)w);	656	ev_stop ((W)w);
547		657
548	++fdchangecnt;	658	++fdchangecnt;
549	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	659	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550	fdchanges [fdchangecnt - 1] = w->fd;	660	fdchanges [fdchangecnt - 1] = w->fd;
551	}	661	}
…		…
554	evtimer_start (struct ev_timer *w)	664	evtimer_start (struct ev_timer *w)
555	{	665	{
556	if (ev_is_active (w))	666	if (ev_is_active (w))
557	return;	667	return;
558		668
559	if (w->is_abs)	669	w->at += now;
560	{
561	/* this formula differs from the one in timer_reify becuse we do not round up */
562	if (w->repeat)
563	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
564		670
565	ev_start ((struct ev_watcher *)w, ++atimercnt);	671	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
		672
		673	ev_start ((W)w, ++timercnt);
566	array_needsize (atimers, atimermax, atimercnt, );	674	array_needsize (timers, timermax, timercnt, );
567	atimers [atimercnt - 1] = w;	675	timers [timercnt - 1] = w;
568	upheap (atimers, atimercnt - 1);	676	upheap ((WT *)timers, timercnt - 1);
569	}
570	else
571	{
572	w->at += now;
573
574	ev_start ((struct ev_watcher *)w, ++rtimercnt);
575	array_needsize (rtimers, rtimermax, rtimercnt, );
576	rtimers [rtimercnt - 1] = w;
577	upheap (rtimers, rtimercnt - 1);
578	}
579
580	}	677	}
581		678
582	void	679	void
583	evtimer_stop (struct ev_timer *w)	680	evtimer_stop (struct ev_timer *w)
584	{	681	{
		682	ev_clear ((W)w);
585	if (!ev_is_active (w))	683	if (!ev_is_active (w))
586	return;	684	return;
587		685
588	if (w->is_abs)
589	{
590	if (w->active < atimercnt--)	686	if (w->active < timercnt--)
591	{	687	{
592	atimers [w->active - 1] = atimers [atimercnt];	688	timers [w->active - 1] = timers [timercnt];
		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))
		701	{
		702	if (w->repeat)
		703	{
		704	w->at = now + w->repeat;
593	downheap (atimers, atimercnt, w->active - 1);	705	downheap ((WT *)timers, timercnt, w->active - 1);
594	}
595	}
596	else
597	{
598	if (w->active < rtimercnt--)
599	{	706	}
600	rtimers [w->active - 1] = rtimers [rtimercnt];	707	else
601	downheap (rtimers, rtimercnt, w->active - 1);	708	evtimer_stop (w);
602	}	709	}
		710	else if (w->repeat)
		711	evtimer_start (w);
		712	}
		713
		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--)
603	}	740	{
		741	periodics [w->active - 1] = periodics [periodiccnt];
		742	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		743	}
604		744
605	ev_stop ((struct ev_watcher *)w);	745	ev_stop ((W)w);
606	}	746	}
607		747
608	void	748	void
609	evsignal_start (struct ev_signal *w)	749	evsignal_start (struct ev_signal *w)
610	{	750	{
611	if (ev_is_active (w))	751	if (ev_is_active (w))
612	return;	752	return;
613		753
614	ev_start ((struct ev_watcher *)w, 1);	754	ev_start ((W)w, 1);
615	array_needsize (signals, signalmax, w->signum, signals_init);	755	array_needsize (signals, signalmax, w->signum, signals_init);
616	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
617		757
618	if (!w->next)	758	if (!w->next)
619	{	759	{
620	struct sigaction sa;	760	struct sigaction sa;
621	sa.sa_handler = sighandler;	761	sa.sa_handler = sighandler;
…		…
626	}	766	}
627		767
628	void	768	void
629	evsignal_stop (struct ev_signal *w)	769	evsignal_stop (struct ev_signal *w)
630	{	770	{
		771	ev_clear ((W)w);
631	if (!ev_is_active (w))	772	if (!ev_is_active (w))
632	return;	773	return;
633		774
634	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
635	ev_stop ((struct ev_watcher *)w);	776	ev_stop ((W)w);
636		777
637	if (!signals [w->signum - 1].head)	778	if (!signals [w->signum - 1].head)
638	signal (w->signum, SIG_DFL);	779	signal (w->signum, SIG_DFL);
639	}	780	}
640		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
641	/*****************************************************************************/	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
642	#if 1	889	#if 0
		890
		891	struct ev_io wio;
643		892
644	static void	893	static void
645	sin_cb (struct ev_io *w, int revents)	894	sin_cb (struct ev_io *w, int revents)
646	{	895	{
647	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	896	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
657		906
658	static void	907	static void
659	scb (struct ev_signal *w, int revents)	908	scb (struct ev_signal *w, int revents)
660	{	909	{
661	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	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
662	}	920	}
663		921
664	int main (void)	922	int main (void)
665	{	923	{
666	struct ev_io sin;
667
668	ev_init (0);	924	ev_init (0);
669		925
670	evw_init (&sin, sin_cb, 55);
671	evio_set (&sin, 0, EV_READ);	926	evio_init (&wio, sin_cb, 0, EV_READ);
672	evio_start (&sin);	927	evio_start (&wio);
673		928
674	struct ev_timer t[10000];	929	struct ev_timer t[10000];
675		930
676	#if 0	931	#if 0
677	int i;	932	int i;
678	for (i = 0; i < 10000; ++i)	933	for (i = 0; i < 10000; ++i)
679	{	934	{
680	struct ev_timer *w = t + i;	935	struct ev_timer *w = t + i;
681	evw_init (w, ocb, i);	936	evw_init (w, ocb, i);
682	evtimer_set_abs (w, drand48 (), 0.99775533);	937	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
683	evtimer_start (w);	938	evtimer_start (w);
684	if (drand48 () < 0.5)	939	if (drand48 () < 0.5)
685	evtimer_stop (w);	940	evtimer_stop (w);
686	}	941	}
687	#endif	942	#endif
688		943
689	struct ev_timer t1;	944	struct ev_timer t1;
690	evw_init (&t1, ocb, 0);	945	evtimer_init (&t1, ocb, 5, 10);
691	evtimer_set_abs (&t1, 5, 10);
692	evtimer_start (&t1);	946	evtimer_start (&t1);
693		947
694	struct ev_signal sig;	948	struct ev_signal sig;
695	evw_init (&sig, scb, 65535);
696	evsignal_set (&sig, SIGQUIT);	949	evsignal_init (&sig, scb, SIGQUIT);
697	evsignal_start (&sig);	950	evsignal_start (&sig);
698		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);
		959
699	ev_loop (0);	960	ev_loop (0);
700		961
701	return 0;	962	return 0;
702	}	963	}
703		964

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs. Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC