[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 1.18 by root, Wed Oct 31 16:29:52 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
…		…
378	}	416	}
379		417
380	static void	418	static void
381	call_pending ()	419	call_pending ()
382	{	420	{
383	int i;	421	while (pendingcnt)
384
385	for (i = 0; i < pendingcnt; ++i)
386	{	422	{
387	ANPENDING *p = pendings + i;	423	ANPENDING *p = pendings + --pendingcnt;
388		424
389	if (p->w)	425	if (p->w)
390	{	426	{
391	p->w->pending = 0;	427	p->w->pending = 0;
392	p->w->cb (p->w, p->events);	428	p->w->cb (p->w, p->events);
393	}	429	}
394	}	430	}
395
396	pendingcnt = 0;
397	}	431	}
398		432
399	static void	433	static void
400	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	434	timers_reify ()
401	{	435	{
402	while (timercnt && timers [0]->at <= now)	436	while (timercnt && timers [0]->at <= now)
403	{	437	{
404	struct ev_timer *w = timers [0];	438	struct ev_timer *w = timers [0];
		439
		440	event ((W)w, EV_TIMEOUT);
405		441
406	/* first reschedule or stop timer */	442	/* first reschedule or stop timer */
407	if (w->repeat)	443	if (w->repeat)
408	{	444	{
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;	445	w->at = now + w->repeat;
413		446	assert (("timer timeout in the past, negative repeat?", w->at > now));
414	assert (w->at > now);
415
416	downheap (timers, timercnt, 0);	447	downheap ((WT *)timers, timercnt, 0);
417	}	448	}
418	else	449	else
419	{
420	evtimer_stop (w); /* nonrepeating: stop timer */	450	evtimer_stop (w); /* nonrepeating: stop timer */
421	--timercnt; /* maybe pass by reference instead? */	451	}
		452	}
		453
		454	static void
		455	periodics_reify ()
		456	{
		457	while (periodiccnt && periodics [0]->at <= ev_now)
		458	{
		459	struct ev_periodic *w = periodics [0];
		460
		461	/* first reschedule or stop timer */
		462	if (w->interval)
422	}	463	{
		464	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		465	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));
		466	downheap ((WT *)periodics, periodiccnt, 0);
		467	}
		468	else
		469	evperiodic_stop (w); /* nonrepeating: stop timer */
423		470
424	event ((struct ev_watcher *)w, EV_TIMEOUT);	471	event ((W)w, EV_TIMEOUT);
		472	}
		473	}
		474
		475	static void
		476	periodics_reschedule (ev_tstamp diff)
		477	{
		478	int i;
		479
		480	/* adjust periodics after time jump */
		481	for (i = 0; i < periodiccnt; ++i)
		482	{
		483	struct ev_periodic *w = periodics [i];
		484
		485	if (w->interval)
		486	{
		487	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		488
		489	if (fabs (diff) >= 1e-4)
		490	{
		491	evperiodic_stop (w);
		492	evperiodic_start (w);
		493
		494	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		495	}
		496	}
425	}	497	}
426	}	498	}
427		499
428	static void	500	static void
429	time_update ()	501	time_update ()
430	{	502	{
431	int i;	503	int i;
		504
432	ev_now = ev_time ();	505	ev_now = ev_time ();
433		506
434	if (have_monotonic)	507	if (have_monotonic)
435	{	508	{
436	ev_tstamp odiff = diff;	509	ev_tstamp odiff = diff;
437		510
438	/* detecting time jumps is much more difficult */
439	for (i = 2; --i; ) /* loop a few times, before making important decisions */	511	for (i = 4; --i; ) /* loop a few times, before making important decisions */
440	{	512	{
441	now = get_clock ();	513	now = get_clock ();
442	diff = ev_now - now;	514	diff = ev_now - now;
443		515
444	if (fabs (odiff - diff) < MIN_TIMEJUMP)	516	if (fabs (odiff - diff) < MIN_TIMEJUMP)
445	return; /* all is well */	517	return; /* all is well */
446		518
447	ev_now = ev_time ();	519	ev_now = ev_time ();
448	}	520	}
449		521
450	/* time jump detected, reschedule atimers */	522	periodics_reschedule (diff - odiff);
451	for (i = 0; i < atimercnt; ++i)	523	/* 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	}	524	}
457	else	525	else
458	{	526	{
459	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	527	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
460	/* time jump detected, adjust rtimers */	528	{
		529	periodics_reschedule (ev_now - now);
		530
		531	/* adjust timers. this is easy, as the offset is the same for all */
461	for (i = 0; i < rtimercnt; ++i)	532	for (i = 0; i < timercnt; ++i)
462	rtimers [i]->at += ev_now - now;	533	timers [i]->at += diff;
		534	}
463		535
464	now = ev_now;	536	now = ev_now;
465	}	537	}
466	}	538	}
467		539
468	int ev_loop_done;	540	int ev_loop_done;
469		541
470	void ev_loop (int flags)	542	void ev_loop (int flags)
471	{	543	{
472	double block;	544	double block;
473	ev_loop_done = flags & EVLOOP_ONESHOT;	545	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
		546
		547	if (checkcnt)
		548	{
		549	queue_events ((W *)checks, checkcnt, EV_CHECK);
		550	call_pending ();
		551	}
474		552
475	do	553	do
476	{	554	{
477	hook_call (EVHOOK_PREPOLL);
478
479	/* update fd-related kernel structures */	555	/* update fd-related kernel structures */
480	fd_reify ();	556	fd_reify ();
481		557
482	/* calculate blocking time */	558	/* calculate blocking time */
		559
		560	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
		561	ev_now = ev_time ();
		562
483	if (flags & EVLOOP_NONBLOCK)	563	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
484	block = 0.;	564	block = 0.;
485	else	565	else
486	{	566	{
487	block = MAX_BLOCKTIME;	567	block = MAX_BLOCKTIME;
488		568
489	if (rtimercnt)	569	if (timercnt)
490	{	570	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	571	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
492	if (block > to) block = to;	572	if (block > to) block = to;
493	}	573	}
494		574
495	if (atimercnt)	575	if (periodiccnt)
496	{	576	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	577	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
498	if (block > to) block = to;	578	if (block > to) block = to;
499	}	579	}
500		580
501	if (block < 0.) block = 0.;	581	if (block < 0.) block = 0.;
502	}	582	}
…		…
504	method_poll (block);	584	method_poll (block);
505		585
506	/* update ev_now, do magic */	586	/* update ev_now, do magic */
507	time_update ();	587	time_update ();
508		588
509	hook_call (EVHOOK_POSTPOLL);
510
511	/* put pending timers into pendign queue and reschedule them */	589	/* queue pending timers and reschedule them */
512	/* absolute timers first */	590	periodics_reify (); /* absolute timers first */
513	timers_reify (atimers, atimercnt, ev_now);
514	/* relative timers second */	591	timers_reify (); /* relative timers second */
515	timers_reify (rtimers, rtimercnt, now);	592
		593	/* queue idle watchers unless io or timers are pending */
		594	if (!pendingcnt)
		595	queue_events ((W *)idles, idlecnt, EV_IDLE);
		596
		597	/* queue check and possibly idle watchers */
		598	queue_events ((W *)checks, checkcnt, EV_CHECK);
516		599
517	call_pending ();	600	call_pending ();
518	}	601	}
519	while (!ev_loop_done);	602	while (!ev_loop_done);
520	}
521		603
522	/*****************************************************************************/	604	if (ev_loop_done != 2)
		605	ev_loop_done = 0;
		606	}
523		607
		608	/*****************************************************************************/
		609
524	static void	610	static void
525	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	611	wlist_add (WL *head, WL elem)
526	{	612	{
527	elem->next = *head;	613	elem->next = *head;
528	*head = elem;	614	*head = elem;
529	}	615	}
530		616
531	static void	617	static void
532	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	618	wlist_del (WL *head, WL elem)
533	{	619	{
534	while (*head)	620	while (*head)
535	{	621	{
536	if (*head == elem)	622	if (*head == elem)
537	{	623	{
…		…
542	head = &(*head)->next;	628	head = &(*head)->next;
543	}	629	}
544	}	630	}
545		631
546	static void	632	static void
547	ev_start (struct ev_watcher *w, int active)	633	ev_clear (W w)
548	{	634	{
		635	if (w->pending)
		636	{
		637	pendings [w->pending - 1].w = 0;
549	w->pending = 0;	638	w->pending = 0;
		639	}
		640	}
		641
		642	static void
		643	ev_start (W w, int active)
		644	{
550	w->active = active;	645	w->active = active;
551	}	646	}
552		647
553	static void	648	static void
554	ev_stop (struct ev_watcher *w)	649	ev_stop (W w)
555	{	650	{
556	if (w->pending)
557	pendings [w->pending - 1].w = 0;
558
559	w->active = 0;	651	w->active = 0;
560	/* nop */
561	}	652	}
562		653
563	/*****************************************************************************/	654	/*****************************************************************************/
564		655
565	void	656	void
…		…
568	if (ev_is_active (w))	659	if (ev_is_active (w))
569	return;	660	return;
570		661
571	int fd = w->fd;	662	int fd = w->fd;
572		663
573	ev_start ((struct ev_watcher *)w, 1);	664	ev_start ((W)w, 1);
574	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	665	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
575	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	666	wlist_add ((WL *)&anfds[fd].head, (WL)w);
576		667
577	++fdchangecnt;	668	++fdchangecnt;
578	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	669	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
579	fdchanges [fdchangecnt - 1] = fd;	670	fdchanges [fdchangecnt - 1] = fd;
580	}	671	}
581		672
582	void	673	void
583	evio_stop (struct ev_io *w)	674	evio_stop (struct ev_io *w)
584	{	675	{
		676	ev_clear ((W)w);
585	if (!ev_is_active (w))	677	if (!ev_is_active (w))
586	return;	678	return;
587		679
588	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	680	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
589	ev_stop ((struct ev_watcher *)w);	681	ev_stop ((W)w);
590		682
591	++fdchangecnt;	683	++fdchangecnt;
592	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	684	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
593	fdchanges [fdchangecnt - 1] = w->fd;	685	fdchanges [fdchangecnt - 1] = w->fd;
594	}	686	}
…		…
597	evtimer_start (struct ev_timer *w)	689	evtimer_start (struct ev_timer *w)
598	{	690	{
599	if (ev_is_active (w))	691	if (ev_is_active (w))
600	return;	692	return;
601		693
602	if (w->is_abs)	694	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		695
608	ev_start ((struct ev_watcher *)w, ++atimercnt);	696	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
		697
		698	ev_start ((W)w, ++timercnt);
609	array_needsize (atimers, atimermax, atimercnt, );	699	array_needsize (timers, timermax, timercnt, );
610	atimers [atimercnt - 1] = w;	700	timers [timercnt - 1] = w;
611	upheap (atimers, atimercnt - 1);	701	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	}	702	}
624		703
625	void	704	void
626	evtimer_stop (struct ev_timer *w)	705	evtimer_stop (struct ev_timer *w)
627	{	706	{
		707	ev_clear ((W)w);
628	if (!ev_is_active (w))	708	if (!ev_is_active (w))
629	return;	709	return;
630		710
631	if (w->is_abs)
632	{
633	if (w->active < atimercnt--)	711	if (w->active < timercnt--)
634	{	712	{
635	atimers [w->active - 1] = atimers [atimercnt];	713	timers [w->active - 1] = timers [timercnt];
		714	downheap ((WT *)timers, timercnt, w->active - 1);
		715	}
		716
		717	w->at = w->repeat;
		718
		719	ev_stop ((W)w);
		720	}
		721
		722	void
		723	evtimer_again (struct ev_timer *w)
		724	{
		725	if (ev_is_active (w))
		726	{
		727	if (w->repeat)
		728	{
		729	w->at = now + w->repeat;
636	downheap (atimers, atimercnt, w->active - 1);	730	downheap ((WT *)timers, timercnt, w->active - 1);
637	}
638	}
639	else
640	{
641	if (w->active < rtimercnt--)
642	{	731	}
643	rtimers [w->active - 1] = rtimers [rtimercnt];	732	else
644	downheap (rtimers, rtimercnt, w->active - 1);	733	evtimer_stop (w);
645	}	734	}
		735	else if (w->repeat)
		736	evtimer_start (w);
		737	}
		738
		739	void
		740	evperiodic_start (struct ev_periodic *w)
		741	{
		742	if (ev_is_active (w))
		743	return;
		744
		745	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
		746
		747	/* this formula differs from the one in periodic_reify because we do not always round up */
		748	if (w->interval)
		749	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
		750
		751	ev_start ((W)w, ++periodiccnt);
		752	array_needsize (periodics, periodicmax, periodiccnt, );
		753	periodics [periodiccnt - 1] = w;
		754	upheap ((WT *)periodics, periodiccnt - 1);
		755	}
		756
		757	void
		758	evperiodic_stop (struct ev_periodic *w)
		759	{
		760	ev_clear ((W)w);
		761	if (!ev_is_active (w))
		762	return;
		763
		764	if (w->active < periodiccnt--)
646	}	765	{
		766	periodics [w->active - 1] = periodics [periodiccnt];
		767	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		768	}
647		769
648	ev_stop ((struct ev_watcher *)w);	770	ev_stop ((W)w);
649	}	771	}
650		772
651	void	773	void
652	evsignal_start (struct ev_signal *w)	774	evsignal_start (struct ev_signal *w)
653	{	775	{
654	if (ev_is_active (w))	776	if (ev_is_active (w))
655	return;	777	return;
656		778
657	ev_start ((struct ev_watcher *)w, 1);	779	ev_start ((W)w, 1);
658	array_needsize (signals, signalmax, w->signum, signals_init);	780	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);	781	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
660		782
661	if (!w->next)	783	if (!w->next)
662	{	784	{
663	struct sigaction sa;	785	struct sigaction sa;
664	sa.sa_handler = sighandler;	786	sa.sa_handler = sighandler;
…		…
669	}	791	}
670		792
671	void	793	void
672	evsignal_stop (struct ev_signal *w)	794	evsignal_stop (struct ev_signal *w)
673	{	795	{
		796	ev_clear ((W)w);
674	if (!ev_is_active (w))	797	if (!ev_is_active (w))
675	return;	798	return;
676		799
677	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	800	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
678	ev_stop ((struct ev_watcher *)w);	801	ev_stop ((W)w);
679		802
680	if (!signals [w->signum - 1].head)	803	if (!signals [w->signum - 1].head)
681	signal (w->signum, SIG_DFL);	804	signal (w->signum, SIG_DFL);
682	}	805	}
683		806
		807	void evidle_start (struct ev_idle *w)
		808	{
		809	if (ev_is_active (w))
		810	return;
		811
		812	ev_start ((W)w, ++idlecnt);
		813	array_needsize (idles, idlemax, idlecnt, );
		814	idles [idlecnt - 1] = w;
		815	}
		816
		817	void evidle_stop (struct ev_idle *w)
		818	{
		819	ev_clear ((W)w);
		820	if (ev_is_active (w))
		821	return;
		822
		823	idles [w->active - 1] = idles [--idlecnt];
		824	ev_stop ((W)w);
		825	}
		826
		827	void evcheck_start (struct ev_check *w)
		828	{
		829	if (ev_is_active (w))
		830	return;
		831
		832	ev_start ((W)w, ++checkcnt);
		833	array_needsize (checks, checkmax, checkcnt, );
		834	checks [checkcnt - 1] = w;
		835	}
		836
		837	void evcheck_stop (struct ev_check *w)
		838	{
		839	ev_clear ((W)w);
		840	if (ev_is_active (w))
		841	return;
		842
		843	checks [w->active - 1] = checks [--checkcnt];
		844	ev_stop ((W)w);
		845	}
		846
684	/*****************************************************************************/	847	/*****************************************************************************/
		848
		849	struct ev_once
		850	{
		851	struct ev_io io;
		852	struct ev_timer to;
		853	void (cb)(int revents, void arg);
		854	void *arg;
		855	};
		856
		857	static void
		858	once_cb (struct ev_once *once, int revents)
		859	{
		860	void (cb)(int revents, void arg) = once->cb;
		861	void *arg = once->arg;
		862
		863	evio_stop (&once->io);
		864	evtimer_stop (&once->to);
		865	free (once);
		866
		867	cb (revents, arg);
		868	}
		869
		870	static void
		871	once_cb_io (struct ev_io *w, int revents)
		872	{
		873	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		874	}
		875
		876	static void
		877	once_cb_to (struct ev_timer *w, int revents)
		878	{
		879	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		880	}
		881
		882	void
		883	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		884	{
		885	struct ev_once *once = malloc (sizeof (struct ev_once));
		886
		887	if (!once)
		888	cb (EV_ERROR, arg);
		889	else
		890	{
		891	once->cb = cb;
		892	once->arg = arg;
		893
		894	evw_init (&once->io, once_cb_io);
		895
		896	if (fd >= 0)
		897	{
		898	evio_set (&once->io, fd, events);
		899	evio_start (&once->io);
		900	}
		901
		902	evw_init (&once->to, once_cb_to);
		903
		904	if (timeout >= 0.)
		905	{
		906	evtimer_set (&once->to, timeout, 0.);
		907	evtimer_start (&once->to);
		908	}
		909	}
		910	}
		911
		912	/*****************************************************************************/
		913
685	#if 1	914	#if 0
		915
		916	struct ev_io wio;
686		917
687	static void	918	static void
688	sin_cb (struct ev_io *w, int revents)	919	sin_cb (struct ev_io *w, int revents)
689	{	920	{
690	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	921	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
700		931
701	static void	932	static void
702	scb (struct ev_signal *w, int revents)	933	scb (struct ev_signal *w, int revents)
703	{	934	{
704	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	935	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		936	evio_stop (&wio);
		937	evio_start (&wio);
		938	}
		939
		940	static void
		941	gcb (struct ev_signal *w, int revents)
		942	{
		943	fprintf (stderr, "generic %x\n", revents);
		944
705	}	945	}
706		946
707	int main (void)	947	int main (void)
708	{	948	{
709	struct ev_io sin;
710
711	ev_init (0);	949	ev_init (0);
712		950
713	evw_init (&sin, sin_cb, 55);
714	evio_set (&sin, 0, EV_READ);	951	evio_init (&wio, sin_cb, 0, EV_READ);
715	evio_start (&sin);	952	evio_start (&wio);
716		953
717	struct ev_timer t[10000];	954	struct ev_timer t[10000];
718		955
719	#if 1	956	#if 0
720	int i;	957	int i;
721	for (i = 0; i < 10000; ++i)	958	for (i = 0; i < 10000; ++i)
722	{	959	{
723	struct ev_timer *w = t + i;	960	struct ev_timer *w = t + i;
724	evw_init (w, ocb, i);	961	evw_init (w, ocb, i);
725	evtimer_set_abs (w, drand48 (), 0.99775533);	962	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
726	evtimer_start (w);	963	evtimer_start (w);
727	if (drand48 () < 0.5)	964	if (drand48 () < 0.5)
728	evtimer_stop (w);	965	evtimer_stop (w);
729	}	966	}
730	#endif	967	#endif
731		968
732	struct ev_timer t1;	969	struct ev_timer t1;
733	evw_init (&t1, ocb, 0);	970	evtimer_init (&t1, ocb, 5, 10);
734	evtimer_set_abs (&t1, 5, 10);
735	evtimer_start (&t1);	971	evtimer_start (&t1);
736		972
737	struct ev_signal sig;	973	struct ev_signal sig;
738	evw_init (&sig, scb, 65535);
739	evsignal_set (&sig, SIGQUIT);	974	evsignal_init (&sig, scb, SIGQUIT);
740	evsignal_start (&sig);	975	evsignal_start (&sig);
741		976
		977	struct ev_check cw;
		978	evcheck_init (&cw, gcb);
		979	evcheck_start (&cw);
		980
		981	struct ev_idle iw;
		982	evidle_init (&iw, gcb);
		983	evidle_start (&iw);
		984
742	ev_loop (0);	985	ev_loop (0);
743		986
744	return 0;	987	return 0;
745	}	988	}
746		989

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Comparing libev/ev.c (file contents): Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs. Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC