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

Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.17 by root, Wed Oct 31 14:44:15 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
1	#include <math.h>	30	#include <math.h>
2	#include <stdlib.h>	31	#include <stdlib.h>
3	#include <unistd.h>	32	#include <unistd.h>
4	#include <fcntl.h>	33	#include <fcntl.h>
5	#include <signal.h>	34	#include <signal.h>
		35	#include <stddef.h>
6		36
7	#include <stdio.h>	37	#include <stdio.h>
8		38
9	#include <assert.h>	39	#include <assert.h>
10	#include <errno.h>	40	#include <errno.h>
11	#include <sys/time.h>	41	#include <sys/time.h>
12	#include <time.h>	42	#include <time.h>
13		43
14	#ifdef CLOCK_MONOTONIC
15	# define HAVE_MONOTONIC 1
16	#endif
17
18	#define HAVE_REALTIME 1
19	#define HAVE_EPOLL 1	44	#define HAVE_EPOLL 1
		45
		46	#ifndef HAVE_MONOTONIC
		47	# ifdef CLOCK_MONOTONIC
		48	# define HAVE_MONOTONIC 1
		49	# endif
		50	#endif
		51
		52	#ifndef HAVE_SELECT
20	#define HAVE_SELECT 1	53	# define HAVE_SELECT 1
		54	#endif
		55
		56	#ifndef HAVE_EPOLL
		57	# define HAVE_EPOLL 0
		58	#endif
		59
		60	#ifndef HAVE_REALTIME
		61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */
		62	#endif
21		63
22	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23	#define MAX_BLOCKTIME 60.	65	#define MAX_BLOCKTIME 60.
24		66
25	#include "ev.h"	67	#include "ev.h"
26		68
27	struct ev_watcher {	69	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);
29	};
30
31	struct ev_watcher_list {	70	typedef struct ev_watcher_list *WL;
32	EV_WATCHER_LIST (ev_watcher_list);	71	typedef struct ev_watcher_time *WT;
33	};
34		72
35	static ev_tstamp now, diff; /* monotonic clock */	73	static ev_tstamp now, diff; /* monotonic clock */
36	ev_tstamp ev_now;	74	ev_tstamp ev_now;
37	int ev_method;	75	int ev_method;
38		76
75		113
76	#define array_needsize(base,cur,cnt,init) \	114	#define array_needsize(base,cur,cnt,init) \
77	if ((cnt) > cur) \	115	if ((cnt) > cur) \
78	{ \	116	{ \
79	int newcnt = cur ? cur << 1 : 16; \	117	int newcnt = cur ? cur << 1 : 16; \
80	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\
81	base = realloc (base, sizeof (base) (newcnt)); \	118	base = realloc (base, sizeof (base) (newcnt)); \
82	init (base + cur, newcnt - cur); \	119	init (base + cur, newcnt - cur); \
83	cur = newcnt; \	120	cur = newcnt; \
84	}	121	}
85		122
…		…
108	}	145	}
109	}	146	}
110		147
111	typedef struct	148	typedef struct
112	{	149	{
113	struct ev_watcher *w;	150	W w;
114	int events;	151	int events;
115	} ANPENDING;	152	} ANPENDING;
116		153
117	static ANPENDING *pendings;	154	static ANPENDING *pendings;
118	static int pendingmax, pendingcnt;	155	static int pendingmax, pendingcnt;
119		156
120	static void	157	static void
121	event (struct ev_watcher *w, int events)	158	event (W w, int events)
122	{	159	{
		160	if (w->active)
		161	{
123	w->pending = ++pendingcnt;	162	w->pending = ++pendingcnt;
124	array_needsize (pendings, pendingmax, pendingcnt, );	163	array_needsize (pendings, pendingmax, pendingcnt, );
125	pendings [pendingcnt - 1].w = w;	164	pendings [pendingcnt - 1].w = w;
126	pendings [pendingcnt - 1].events = events;	165	pendings [pendingcnt - 1].events = events;
		166	}
127	}	167	}
128		168
129	static void	169	static void
130	fd_event (int fd, int events)	170	fd_event (int fd, int events)
131	{	171	{
…		…
135	for (w = anfd->head; w; w = w->next)	175	for (w = anfd->head; w; w = w->next)
136	{	176	{
137	int ev = w->events & events;	177	int ev = w->events & events;
138		178
139	if (ev)	179	if (ev)
140	event ((struct ev_watcher *)w, ev);	180	event ((W)w, ev);
141	}	181	}
142	}	182	}
143		183
144	/*****************************************************************************/	184	static void
		185	queue_events (W *events, int eventcnt, int type)
		186	{
		187	int i;
145		188
		189	for (i = 0; i < eventcnt; ++i)
		190	event (events [i], type);
		191	}
		192
		193	/*****************************************************************************/
		194
146	static struct ev_timer **atimers;	195	static struct ev_timer **timers;
147	static int atimermax, atimercnt;	196	static int timermax, timercnt;
148		197
149	static struct ev_timer **rtimers;	198	static struct ev_periodic **periodics;
150	static int rtimermax, rtimercnt;	199	static int periodicmax, periodiccnt;
151		200
152	static void	201	static void
153	upheap (struct ev_timer **timers, int k)	202	upheap (WT *timers, int k)
154	{	203	{
155	struct ev_timer *w = timers [k];	204	WT w = timers [k];
156		205
157	while (k && timers [k >> 1]->at > w->at)	206	while (k && timers [k >> 1]->at > w->at)
158	{	207	{
159	timers [k] = timers [k >> 1];	208	timers [k] = timers [k >> 1];
160	timers [k]->active = k + 1;	209	timers [k]->active = k + 1;
…		…
165	timers [k]->active = k + 1;	214	timers [k]->active = k + 1;
166		215
167	}	216	}
168		217
169	static void	218	static void
170	downheap (struct ev_timer **timers, int N, int k)	219	downheap (WT *timers, int N, int k)
171	{	220	{
172	struct ev_timer *w = timers [k];	221	WT w = timers [k];
173		222
174	while (k < (N >> 1))	223	while (k < (N >> 1))
175	{	224	{
176	int j = k << 1;	225	int j = k << 1;
177		226
…		…
241	if (signals [sig].gotsig)	290	if (signals [sig].gotsig)
242	{	291	{
243	signals [sig].gotsig = 0;	292	signals [sig].gotsig = 0;
244		293
245	for (w = signals [sig].head; w; w = w->next)	294	for (w = signals [sig].head; w; w = w->next)
246	event ((struct ev_watcher *)w, EV_SIGNAL);	295	event ((W)w, EV_SIGNAL);
247	}	296	}
248	}	297	}
249		298
250	static void	299	static void
251	siginit (void)	300	siginit (void)
…		…
258	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
259		308
260	evio_set (&sigev, sigpipe [0], EV_READ);	309	evio_set (&sigev, sigpipe [0], EV_READ);
261	evio_start (&sigev);	310	evio_start (&sigev);
262	}	311	}
		312
		313	/*****************************************************************************/
		314
		315	static struct ev_idle **idles;
		316	static int idlemax, idlecnt;
		317
		318	static struct ev_check **checks;
		319	static int checkmax, checkcnt;
263		320
264	/*****************************************************************************/	321	/*****************************************************************************/
265		322
266	#if HAVE_EPOLL	323	#if HAVE_EPOLL
267	# include "ev_epoll.c"	324	# include "ev_epoll.c"
…		…
295	if (ev_method == EVMETHOD_NONE) select_init (flags);	352	if (ev_method == EVMETHOD_NONE) select_init (flags);
296	#endif	353	#endif
297		354
298	if (ev_method)	355	if (ev_method)
299	{	356	{
300	evw_init (&sigev, sigcb, 0);	357	evw_init (&sigev, sigcb);
301	siginit ();	358	siginit ();
302	}	359	}
303		360
304	return ev_method;	361	return ev_method;
305	}	362	}
306		363
307	/*****************************************************************************/	364	/*****************************************************************************/
308		365
309	void ev_prefork (void)	366	void ev_prefork (void)
310	{	367	{
		368	/* nop */
311	}	369	}
312		370
313	void ev_postfork_parent (void)	371	void ev_postfork_parent (void)
314	{	372	{
		373	/* nop */
315	}	374	}
316		375
317	void ev_postfork_child (void)	376	void ev_postfork_child (void)
318	{	377	{
319	#if HAVE_EPOLL	378	#if HAVE_EPOLL
…		…
328	siginit ();	387	siginit ();
329	}	388	}
330		389
331	/*****************************************************************************/	390	/*****************************************************************************/
332		391
333	static ev_hook hooks [EVHOOK_NUM];
334
335	void
336	ev_hook_register (int type, ev_hook hook)
337	{
338	hooks [type] = hook;
339	}
340
341	void
342	ev_hook_unregister (int type, ev_hook hook)
343	{
344	hooks [type] = 0;
345	}
346
347	static void
348	hook_call (int type)
349	{
350	if (hooks [type])
351	hooks [type] ();
352	}
353
354	static void	392	static void
355	fd_reify (void)	393	fd_reify (void)
356	{	394	{
357	int i;	395	int i;
358		396
…		…
395		433
396	pendingcnt = 0;	434	pendingcnt = 0;
397	}	435	}
398		436
399	static void	437	static void
400	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	438	timers_reify ()
401	{	439	{
402	while (timercnt && timers [0]->at <= now)	440	while (timercnt && timers [0]->at <= now)
403	{	441	{
404	struct ev_timer *w = timers [0];	442	struct ev_timer *w = timers [0];
		443
		444	event ((W)w, EV_TIMEOUT);
405		445
406	/* first reschedule or stop timer */	446	/* first reschedule or stop timer */
407	if (w->repeat)	447	if (w->repeat)
408	{	448	{
409	if (w->is_abs)
410	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
411	else
412	w->at = now + w->repeat;	449	w->at = now + w->repeat;
413		450	assert (("timer timeout in the past, negative repeat?", w->at > now));
414	assert (w->at > now);
415
416	downheap (timers, timercnt, 0);	451	downheap ((WT *)timers, timercnt, 0);
417	}	452	}
418	else	453	else
419	{
420	evtimer_stop (w); /* nonrepeating: stop timer */	454	evtimer_stop (w); /* nonrepeating: stop timer */
421	--timercnt; /* maybe pass by reference instead? */	455	}
		456	}
		457
		458	static void
		459	periodics_reify ()
		460	{
		461	while (periodiccnt && periodics [0]->at <= ev_now)
		462	{
		463	struct ev_periodic *w = periodics [0];
		464
		465	/* first reschedule or stop timer */
		466	if (w->interval)
422	}	467	{
		468	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		469	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));
		470	downheap ((WT *)periodics, periodiccnt, 0);
		471	}
		472	else
		473	evperiodic_stop (w); /* nonrepeating: stop timer */
423		474
424	event ((struct ev_watcher *)w, EV_TIMEOUT);	475	event ((W)w, EV_TIMEOUT);
		476	}
		477	}
		478
		479	static void
		480	periodics_reschedule (ev_tstamp diff)
		481	{
		482	int i;
		483
		484	/* adjust periodics after time jump */
		485	for (i = 0; i < periodiccnt; ++i)
		486	{
		487	struct ev_periodic *w = periodics [i];
		488
		489	if (w->interval)
		490	{
		491	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		492
		493	if (fabs (diff) >= 1e-4)
		494	{
		495	evperiodic_stop (w);
		496	evperiodic_start (w);
		497
		498	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		499	}
		500	}
425	}	501	}
426	}	502	}
427		503
428	static void	504	static void
429	time_update ()	505	time_update ()
430	{	506	{
431	int i;	507	int i;
		508
432	ev_now = ev_time ();	509	ev_now = ev_time ();
433		510
434	if (have_monotonic)	511	if (have_monotonic)
435	{	512	{
436	ev_tstamp odiff = diff;	513	ev_tstamp odiff = diff;
437		514
438	/* detecting time jumps is much more difficult */
439	for (i = 2; --i; ) /* loop a few times, before making important decisions */	515	for (i = 4; --i; ) /* loop a few times, before making important decisions */
440	{	516	{
441	now = get_clock ();	517	now = get_clock ();
442	diff = ev_now - now;	518	diff = ev_now - now;
443		519
444	if (fabs (odiff - diff) < MIN_TIMEJUMP)	520	if (fabs (odiff - diff) < MIN_TIMEJUMP)
445	return; /* all is well */	521	return; /* all is well */
446		522
447	ev_now = ev_time ();	523	ev_now = ev_time ();
448	}	524	}
449		525
450	/* time jump detected, reschedule atimers */	526	periodics_reschedule (diff - odiff);
451	for (i = 0; i < atimercnt; ++i)	527	/* no timer adjustment, as the monotonic clock doesn't jump */
452	{
453	struct ev_timer *w = atimers [i];
454	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
455	}
456	}	528	}
457	else	529	else
458	{	530	{
459	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	531	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
460	/* time jump detected, adjust rtimers */	532	{
		533	periodics_reschedule (ev_now - now);
		534
		535	/* adjust timers. this is easy, as the offset is the same for all */
461	for (i = 0; i < rtimercnt; ++i)	536	for (i = 0; i < timercnt; ++i)
462	rtimers [i]->at += ev_now - now;	537	timers [i]->at += diff;
		538	}
463		539
464	now = ev_now;	540	now = ev_now;
465	}	541	}
466	}	542	}
467		543
468	int ev_loop_done;	544	int ev_loop_done;
469		545
470	void ev_loop (int flags)	546	void ev_loop (int flags)
471	{	547	{
472	double block;	548	double block;
473	ev_loop_done = flags & EVLOOP_ONESHOT;	549	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
		550
		551	if (checkcnt)
		552	{
		553	queue_events ((W *)checks, checkcnt, EV_CHECK);
		554	call_pending ();
		555	}
474		556
475	do	557	do
476	{	558	{
477	hook_call (EVHOOK_PREPOLL);
478
479	/* update fd-related kernel structures */	559	/* update fd-related kernel structures */
480	fd_reify ();	560	fd_reify ();
481		561
482	/* calculate blocking time */	562	/* calculate blocking time */
		563
		564	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
		565	ev_now = ev_time ();
		566
483	if (flags & EVLOOP_NONBLOCK)	567	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
484	block = 0.;	568	block = 0.;
485	else	569	else
486	{	570	{
487	block = MAX_BLOCKTIME;	571	block = MAX_BLOCKTIME;
488		572
489	if (rtimercnt)	573	if (timercnt)
490	{	574	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	575	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
492	if (block > to) block = to;	576	if (block > to) block = to;
493	}	577	}
494		578
495	if (atimercnt)	579	if (periodiccnt)
496	{	580	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	581	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
498	if (block > to) block = to;	582	if (block > to) block = to;
499	}	583	}
500		584
501	if (block < 0.) block = 0.;	585	if (block < 0.) block = 0.;
502	}	586	}
…		…
504	method_poll (block);	588	method_poll (block);
505		589
506	/* update ev_now, do magic */	590	/* update ev_now, do magic */
507	time_update ();	591	time_update ();
508		592
509	hook_call (EVHOOK_POSTPOLL);
510
511	/* put pending timers into pendign queue and reschedule them */	593	/* queue pending timers and reschedule them */
512	/* absolute timers first */	594	periodics_reify (); /* absolute timers first */
513	timers_reify (atimers, atimercnt, ev_now);
514	/* relative timers second */	595	timers_reify (); /* relative timers second */
515	timers_reify (rtimers, rtimercnt, now);	596
		597	/* queue idle watchers unless io or timers are pending */
		598	if (!pendingcnt)
		599	queue_events ((W *)idles, idlecnt, EV_IDLE);
		600
		601	/* queue check and possibly idle watchers */
		602	queue_events ((W *)checks, checkcnt, EV_CHECK);
516		603
517	call_pending ();	604	call_pending ();
518	}	605	}
519	while (!ev_loop_done);	606	while (!ev_loop_done);
520	}
521		607
522	/*****************************************************************************/	608	if (ev_loop_done != 2)
		609	ev_loop_done = 0;
		610	}
523		611
		612	/*****************************************************************************/
		613
524	static void	614	static void
525	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	615	wlist_add (WL *head, WL elem)
526	{	616	{
527	elem->next = *head;	617	elem->next = *head;
528	*head = elem;	618	*head = elem;
529	}	619	}
530		620
531	static void	621	static void
532	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	622	wlist_del (WL *head, WL elem)
533	{	623	{
534	while (*head)	624	while (*head)
535	{	625	{
536	if (*head == elem)	626	if (*head == elem)
537	{	627	{
…		…
542	head = &(*head)->next;	632	head = &(*head)->next;
543	}	633	}
544	}	634	}
545		635
546	static void	636	static void
547	ev_start (struct ev_watcher *w, int active)	637	ev_clear (W w)
548	{	638	{
		639	if (w->pending)
		640	{
		641	pendings [w->pending - 1].w = 0;
549	w->pending = 0;	642	w->pending = 0;
		643	}
		644	}
		645
		646	static void
		647	ev_start (W w, int active)
		648	{
550	w->active = active;	649	w->active = active;
551	}	650	}
552		651
553	static void	652	static void
554	ev_stop (struct ev_watcher *w)	653	ev_stop (W w)
555	{	654	{
556	if (w->pending)
557	pendings [w->pending - 1].w = 0;
558
559	w->active = 0;	655	w->active = 0;
560	/* nop */
561	}	656	}
562		657
563	/*****************************************************************************/	658	/*****************************************************************************/
564		659
565	void	660	void
…		…
568	if (ev_is_active (w))	663	if (ev_is_active (w))
569	return;	664	return;
570		665
571	int fd = w->fd;	666	int fd = w->fd;
572		667
573	ev_start ((struct ev_watcher *)w, 1);	668	ev_start ((W)w, 1);
574	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	669	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
575	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	670	wlist_add ((WL *)&anfds[fd].head, (WL)w);
576		671
577	++fdchangecnt;	672	++fdchangecnt;
578	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	673	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
579	fdchanges [fdchangecnt - 1] = fd;	674	fdchanges [fdchangecnt - 1] = fd;
580	}	675	}
581		676
582	void	677	void
583	evio_stop (struct ev_io *w)	678	evio_stop (struct ev_io *w)
584	{	679	{
		680	ev_clear ((W)w);
585	if (!ev_is_active (w))	681	if (!ev_is_active (w))
586	return;	682	return;
587		683
588	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	684	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
589	ev_stop ((struct ev_watcher *)w);	685	ev_stop ((W)w);
590		686
591	++fdchangecnt;	687	++fdchangecnt;
592	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	688	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
593	fdchanges [fdchangecnt - 1] = w->fd;	689	fdchanges [fdchangecnt - 1] = w->fd;
594	}	690	}
…		…
597	evtimer_start (struct ev_timer *w)	693	evtimer_start (struct ev_timer *w)
598	{	694	{
599	if (ev_is_active (w))	695	if (ev_is_active (w))
600	return;	696	return;
601		697
602	if (w->is_abs)	698	w->at += now;
603	{
604	/* this formula differs from the one in timer_reify becuse we do not round up */
605	if (w->repeat)
606	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
607		699
608	ev_start ((struct ev_watcher *)w, ++atimercnt);	700	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
		701
		702	ev_start ((W)w, ++timercnt);
609	array_needsize (atimers, atimermax, atimercnt, );	703	array_needsize (timers, timermax, timercnt, );
610	atimers [atimercnt - 1] = w;	704	timers [timercnt - 1] = w;
611	upheap (atimers, atimercnt - 1);	705	upheap ((WT *)timers, timercnt - 1);
612	}
613	else
614	{
615	w->at += now;
616
617	ev_start ((struct ev_watcher *)w, ++rtimercnt);
618	array_needsize (rtimers, rtimermax, rtimercnt, );
619	rtimers [rtimercnt - 1] = w;
620	upheap (rtimers, rtimercnt - 1);
621	}
622
623	}	706	}
624		707
625	void	708	void
626	evtimer_stop (struct ev_timer *w)	709	evtimer_stop (struct ev_timer *w)
627	{	710	{
		711	ev_clear ((W)w);
628	if (!ev_is_active (w))	712	if (!ev_is_active (w))
629	return;	713	return;
630		714
631	if (w->is_abs)
632	{
633	if (w->active < atimercnt--)	715	if (w->active < timercnt--)
634	{	716	{
635	atimers [w->active - 1] = atimers [atimercnt];	717	timers [w->active - 1] = timers [timercnt];
		718	downheap ((WT *)timers, timercnt, w->active - 1);
		719	}
		720
		721	w->at = w->repeat;
		722
		723	ev_stop ((W)w);
		724	}
		725
		726	void
		727	evtimer_again (struct ev_timer *w)
		728	{
		729	if (ev_is_active (w))
		730	{
		731	if (w->repeat)
		732	{
		733	w->at = now + w->repeat;
636	downheap (atimers, atimercnt, w->active - 1);	734	downheap ((WT *)timers, timercnt, w->active - 1);
637	}
638	}
639	else
640	{
641	if (w->active < rtimercnt--)
642	{	735	}
643	rtimers [w->active - 1] = rtimers [rtimercnt];	736	else
644	downheap (rtimers, rtimercnt, w->active - 1);	737	evtimer_stop (w);
645	}	738	}
		739	else if (w->repeat)
		740	evtimer_start (w);
		741	}
		742
		743	void
		744	evperiodic_start (struct ev_periodic *w)
		745	{
		746	if (ev_is_active (w))
		747	return;
		748
		749	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
		750
		751	/* this formula differs from the one in periodic_reify because we do not always round up */
		752	if (w->interval)
		753	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
		754
		755	ev_start ((W)w, ++periodiccnt);
		756	array_needsize (periodics, periodicmax, periodiccnt, );
		757	periodics [periodiccnt - 1] = w;
		758	upheap ((WT *)periodics, periodiccnt - 1);
		759	}
		760
		761	void
		762	evperiodic_stop (struct ev_periodic *w)
		763	{
		764	ev_clear ((W)w);
		765	if (!ev_is_active (w))
		766	return;
		767
		768	if (w->active < periodiccnt--)
646	}	769	{
		770	periodics [w->active - 1] = periodics [periodiccnt];
		771	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		772	}
647		773
648	ev_stop ((struct ev_watcher *)w);	774	ev_stop ((W)w);
649	}	775	}
650		776
651	void	777	void
652	evsignal_start (struct ev_signal *w)	778	evsignal_start (struct ev_signal *w)
653	{	779	{
654	if (ev_is_active (w))	780	if (ev_is_active (w))
655	return;	781	return;
656		782
657	ev_start ((struct ev_watcher *)w, 1);	783	ev_start ((W)w, 1);
658	array_needsize (signals, signalmax, w->signum, signals_init);	784	array_needsize (signals, signalmax, w->signum, signals_init);
659	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	785	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
660		786
661	if (!w->next)	787	if (!w->next)
662	{	788	{
663	struct sigaction sa;	789	struct sigaction sa;
664	sa.sa_handler = sighandler;	790	sa.sa_handler = sighandler;
…		…
669	}	795	}
670		796
671	void	797	void
672	evsignal_stop (struct ev_signal *w)	798	evsignal_stop (struct ev_signal *w)
673	{	799	{
		800	ev_clear ((W)w);
674	if (!ev_is_active (w))	801	if (!ev_is_active (w))
675	return;	802	return;
676		803
677	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	804	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
678	ev_stop ((struct ev_watcher *)w);	805	ev_stop ((W)w);
679		806
680	if (!signals [w->signum - 1].head)	807	if (!signals [w->signum - 1].head)
681	signal (w->signum, SIG_DFL);	808	signal (w->signum, SIG_DFL);
682	}	809	}
683		810
		811	void evidle_start (struct ev_idle *w)
		812	{
		813	if (ev_is_active (w))
		814	return;
		815
		816	ev_start ((W)w, ++idlecnt);
		817	array_needsize (idles, idlemax, idlecnt, );
		818	idles [idlecnt - 1] = w;
		819	}
		820
		821	void evidle_stop (struct ev_idle *w)
		822	{
		823	ev_clear ((W)w);
		824	if (ev_is_active (w))
		825	return;
		826
		827	idles [w->active - 1] = idles [--idlecnt];
		828	ev_stop ((W)w);
		829	}
		830
		831	void evcheck_start (struct ev_check *w)
		832	{
		833	if (ev_is_active (w))
		834	return;
		835
		836	ev_start ((W)w, ++checkcnt);
		837	array_needsize (checks, checkmax, checkcnt, );
		838	checks [checkcnt - 1] = w;
		839	}
		840
		841	void evcheck_stop (struct ev_check *w)
		842	{
		843	ev_clear ((W)w);
		844	if (ev_is_active (w))
		845	return;
		846
		847	checks [w->active - 1] = checks [--checkcnt];
		848	ev_stop ((W)w);
		849	}
		850
684	/*****************************************************************************/	851	/*****************************************************************************/
		852
		853	struct ev_once
		854	{
		855	struct ev_io io;
		856	struct ev_timer to;
		857	void (cb)(int revents, void arg);
		858	void *arg;
		859	};
		860
		861	static void
		862	once_cb (struct ev_once *once, int revents)
		863	{
		864	void (cb)(int revents, void arg) = once->cb;
		865	void *arg = once->arg;
		866
		867	evio_stop (&once->io);
		868	evtimer_stop (&once->to);
		869	free (once);
		870
		871	cb (revents, arg);
		872	}
		873
		874	static void
		875	once_cb_io (struct ev_io *w, int revents)
		876	{
		877	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		878	}
		879
		880	static void
		881	once_cb_to (struct ev_timer *w, int revents)
		882	{
		883	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		884	}
		885
		886	void
		887	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		888	{
		889	struct ev_once *once = malloc (sizeof (struct ev_once));
		890
		891	if (!once)
		892	cb (EV_ERROR, arg);
		893	else
		894	{
		895	once->cb = cb;
		896	once->arg = arg;
		897
		898	evw_init (&once->io, once_cb_io);
		899
		900	if (fd >= 0)
		901	{
		902	evio_set (&once->io, fd, events);
		903	evio_start (&once->io);
		904	}
		905
		906	evw_init (&once->to, once_cb_to);
		907
		908	if (timeout >= 0.)
		909	{
		910	evtimer_set (&once->to, timeout, 0.);
		911	evtimer_start (&once->to);
		912	}
		913	}
		914	}
		915
		916	/*****************************************************************************/
		917
685	#if 1	918	#if 0
		919
		920	struct ev_io wio;
686		921
687	static void	922	static void
688	sin_cb (struct ev_io *w, int revents)	923	sin_cb (struct ev_io *w, int revents)
689	{	924	{
690	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	925	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
700		935
701	static void	936	static void
702	scb (struct ev_signal *w, int revents)	937	scb (struct ev_signal *w, int revents)
703	{	938	{
704	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	939	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		940	evio_stop (&wio);
		941	evio_start (&wio);
		942	}
		943
		944	static void
		945	gcb (struct ev_signal *w, int revents)
		946	{
		947	fprintf (stderr, "generic %x\n", revents);
		948
705	}	949	}
706		950
707	int main (void)	951	int main (void)
708	{	952	{
709	struct ev_io sin;
710
711	ev_init (0);	953	ev_init (0);
712		954
713	evw_init (&sin, sin_cb, 55);
714	evio_set (&sin, 0, EV_READ);	955	evio_init (&wio, sin_cb, 0, EV_READ);
715	evio_start (&sin);	956	evio_start (&wio);
716		957
717	struct ev_timer t[10000];	958	struct ev_timer t[10000];
718		959
719	#if 1	960	#if 0
720	int i;	961	int i;
721	for (i = 0; i < 10000; ++i)	962	for (i = 0; i < 10000; ++i)
722	{	963	{
723	struct ev_timer *w = t + i;	964	struct ev_timer *w = t + i;
724	evw_init (w, ocb, i);	965	evw_init (w, ocb, i);
725	evtimer_set_abs (w, drand48 (), 0.99775533);	966	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
726	evtimer_start (w);	967	evtimer_start (w);
727	if (drand48 () < 0.5)	968	if (drand48 () < 0.5)
728	evtimer_stop (w);	969	evtimer_stop (w);
729	}	970	}
730	#endif	971	#endif
731		972
732	struct ev_timer t1;	973	struct ev_timer t1;
733	evw_init (&t1, ocb, 0);	974	evtimer_init (&t1, ocb, 5, 10);
734	evtimer_set_abs (&t1, 5, 10);
735	evtimer_start (&t1);	975	evtimer_start (&t1);
736		976
737	struct ev_signal sig;	977	struct ev_signal sig;
738	evw_init (&sig, scb, 65535);
739	evsignal_set (&sig, SIGQUIT);	978	evsignal_init (&sig, scb, SIGQUIT);
740	evsignal_start (&sig);	979	evsignal_start (&sig);
741		980
		981	struct ev_check cw;
		982	evcheck_init (&cw, gcb);
		983	evcheck_start (&cw);
		984
		985	struct ev_idle iw;
		986	evidle_init (&iw, gcb);
		987	evidle_start (&iw);
		988
742	ev_loop (0);	989	ev_loop (0);
743		990
744	return 0;	991	return 0;
745	}	992	}
746		993

Diff Legend

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

Comparing libev/ev.c (file contents): Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs. Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC