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

Comparing libev/ev.c (file contents):
Revision 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs.
Revision 1.24 by root, Wed Oct 31 20:46:44 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>
		41	#include <sys/types.h>
		42	#include <sys/wait.h>
11	#include <sys/time.h>	43	#include <sys/time.h>
12	#include <time.h>	44	#include <time.h>
13		45
		46	#ifndef HAVE_MONOTONIC
14	#ifdef CLOCK_MONOTONIC	47	# ifdef CLOCK_MONOTONIC
15	# define HAVE_MONOTONIC 1	48	# define HAVE_MONOTONIC 1
16	#endif	49	# endif
		50	#endif
17		51
18	#define HAVE_REALTIME 1	52	#ifndef HAVE_SELECT
19	#define HAVE_EPOLL 1
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.
		66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */
24		67
25	#include "ev.h"	68	#include "ev.h"
26		69
27	struct ev_watcher {	70	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);
29	};
30
31	struct ev_watcher_list {	71	typedef struct ev_watcher_list *WL;
32	EV_WATCHER_LIST (ev_watcher_list);	72	typedef struct ev_watcher_time *WT;
33	};
34		73
35	static ev_tstamp now, diff; /* monotonic clock */	74	static ev_tstamp now, diff; /* monotonic clock */
36	ev_tstamp ev_now;	75	ev_tstamp ev_now;
37	int ev_method;	76	int ev_method;
38		77
74	}	113	}
75		114
76	#define array_needsize(base,cur,cnt,init) \	115	#define array_needsize(base,cur,cnt,init) \
77	if ((cnt) > cur) \	116	if ((cnt) > cur) \
78	{ \	117	{ \
79	int newcnt = cur ? cur << 1 : 16; \	118	int newcnt = cur; \
80	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	119	do \
		120	{ \
		121	newcnt = (newcnt << 1) \| 4 & ~3; \
		122	} \
		123	while ((cnt) > newcnt); \
		124	\
81	base = realloc (base, sizeof (base) (newcnt)); \	125	base = realloc (base, sizeof (base) (newcnt)); \
82	init (base + cur, newcnt - cur); \	126	init (base + cur, newcnt - cur); \
83	cur = newcnt; \	127	cur = newcnt; \
84	}	128	}
85		129
…		…
108	}	152	}
109	}	153	}
110		154
111	typedef struct	155	typedef struct
112	{	156	{
113	struct ev_watcher *w;	157	W w;
114	int events;	158	int events;
115	} ANPENDING;	159	} ANPENDING;
116		160
117	static ANPENDING *pendings;	161	static ANPENDING *pendings;
118	static int pendingmax, pendingcnt;	162	static int pendingmax, pendingcnt;
119		163
120	static void	164	static void
121	event (struct ev_watcher *w, int events)	165	event (W w, int events)
122	{	166	{
		167	if (w->active)
		168	{
123	w->pending = ++pendingcnt;	169	w->pending = ++pendingcnt;
124	array_needsize (pendings, pendingmax, pendingcnt, );	170	array_needsize (pendings, pendingmax, pendingcnt, );
125	pendings [pendingcnt - 1].w = w;	171	pendings [pendingcnt - 1].w = w;
126	pendings [pendingcnt - 1].events = events;	172	pendings [pendingcnt - 1].events = events;
		173	}
127	}	174	}
128		175
129	static void	176	static void
130	fd_event (int fd, int events)	177	fd_event (int fd, int events)
131	{	178	{
…		…
135	for (w = anfd->head; w; w = w->next)	182	for (w = anfd->head; w; w = w->next)
136	{	183	{
137	int ev = w->events & events;	184	int ev = w->events & events;
138		185
139	if (ev)	186	if (ev)
140	event ((struct ev_watcher *)w, ev);	187	event ((W)w, ev);
141	}	188	}
142	}	189	}
143		190
144	static void	191	static void
145	queue_events (struct ev_watcher **events, int eventcnt, int type)	192	queue_events (W *events, int eventcnt, int type)
146	{	193	{
147	int i;	194	int i;
148		195
149	for (i = 0; i < eventcnt; ++i)	196	for (i = 0; i < eventcnt; ++i)
150	event (events [i], type);	197	event (events [i], type);
151	}	198	}
152		199
153	/*****************************************************************************/	200	/* called on EBADF to verify fds */
		201	static void
		202	fd_recheck (void)
		203	{
		204	int fd;
154		205
		206	for (fd = 0; fd < anfdmax; ++fd)
		207	if (anfds [fd].wev)
		208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		209	while (anfds [fd].head)
		210	{
		211	event ((W)anfds [fd].head, EV_ERROR);
		212	evio_stop (anfds [fd].head);
		213	}
		214	}
		215
		216	/*****************************************************************************/
		217
155	static struct ev_timer **atimers;	218	static struct ev_timer **timers;
156	static int atimermax, atimercnt;	219	static int timermax, timercnt;
157		220
158	static struct ev_timer **rtimers;	221	static struct ev_periodic **periodics;
159	static int rtimermax, rtimercnt;	222	static int periodicmax, periodiccnt;
160		223
161	static void	224	static void
162	upheap (struct ev_timer **timers, int k)	225	upheap (WT *timers, int k)
163	{	226	{
164	struct ev_timer *w = timers [k];	227	WT w = timers [k];
165		228
166	while (k && timers [k >> 1]->at > w->at)	229	while (k && timers [k >> 1]->at > w->at)
167	{	230	{
168	timers [k] = timers [k >> 1];	231	timers [k] = timers [k >> 1];
169	timers [k]->active = k + 1;	232	timers [k]->active = k + 1;
…		…
174	timers [k]->active = k + 1;	237	timers [k]->active = k + 1;
175		238
176	}	239	}
177		240
178	static void	241	static void
179	downheap (struct ev_timer **timers, int N, int k)	242	downheap (WT *timers, int N, int k)
180	{	243	{
181	struct ev_timer *w = timers [k];	244	WT w = timers [k];
182		245
183	while (k < (N >> 1))	246	while (k < (N >> 1))
184	{	247	{
185	int j = k << 1;	248	int j = k << 1;
186		249
…		…
250	if (signals [sig].gotsig)	313	if (signals [sig].gotsig)
251	{	314	{
252	signals [sig].gotsig = 0;	315	signals [sig].gotsig = 0;
253		316
254	for (w = signals [sig].head; w; w = w->next)	317	for (w = signals [sig].head; w; w = w->next)
255	event ((struct ev_watcher *)w, EV_SIGNAL);	318	event ((W)w, EV_SIGNAL);
256	}	319	}
257	}	320	}
258		321
259	static void	322	static void
260	siginit (void)	323	siginit (void)
…		…
273	/*****************************************************************************/	336	/*****************************************************************************/
274		337
275	static struct ev_idle **idles;	338	static struct ev_idle **idles;
276	static int idlemax, idlecnt;	339	static int idlemax, idlecnt;
277		340
		341	static struct ev_prepare **prepares;
		342	static int preparemax, preparecnt;
		343
278	static struct ev_check **checks;	344	static struct ev_check **checks;
279	static int checkmax, checkcnt;	345	static int checkmax, checkcnt;
280		346
281	/*****************************************************************************/	347	/*****************************************************************************/
282		348
		349	static struct ev_child *childs [PID_HASHSIZE];
		350	static struct ev_signal childev;
		351
		352	#ifndef WCONTINUED
		353	# define WCONTINUED 0
		354	#endif
		355
		356	static void
		357	childcb (struct ev_signal *sw, int revents)
		358	{
		359	struct ev_child *w;
		360	int pid, status;
		361
		362	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)
		363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
		364	if (w->pid == pid \|\| w->pid == -1)
		365	{
		366	w->status = status;
		367	event ((W)w, EV_CHILD);
		368	}
		369	}
		370
		371	/*****************************************************************************/
		372
283	#if HAVE_EPOLL	373	#if HAVE_EPOLL
284	# include "ev_epoll.c"	374	# include "ev_epoll.c"
285	#endif	375	#endif
286	#if HAVE_SELECT	376	#if HAVE_SELECT
287	# include "ev_select.c"	377	# include "ev_select.c"
288	#endif	378	#endif
289		379
		380	int
		381	ev_version_major (void)
		382	{
		383	return EV_VERSION_MAJOR;
		384	}
		385
		386	int
		387	ev_version_minor (void)
		388	{
		389	return EV_VERSION_MINOR;
		390	}
		391
290	int ev_init (int flags)	392	int ev_init (int flags)
291	{	393	{
		394	if (!ev_method)
		395	{
292	#if HAVE_MONOTONIC	396	#if HAVE_MONOTONIC
293	{	397	{
294	struct timespec ts;	398	struct timespec ts;
295	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
296	have_monotonic = 1;	400	have_monotonic = 1;
297	}	401	}
298	#endif	402	#endif
299		403
300	ev_now = ev_time ();	404	ev_now = ev_time ();
301	now = get_clock ();	405	now = get_clock ();
302	diff = ev_now - now;	406	diff = ev_now - now;
303		407
304	if (pipe (sigpipe))	408	if (pipe (sigpipe))
305	return 0;	409	return 0;
306		410
307	ev_method = EVMETHOD_NONE;	411	ev_method = EVMETHOD_NONE;
308	#if HAVE_EPOLL	412	#if HAVE_EPOLL
309	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
310	#endif	414	#endif
311	#if HAVE_SELECT	415	#if HAVE_SELECT
312	if (ev_method == EVMETHOD_NONE) select_init (flags);	416	if (ev_method == EVMETHOD_NONE) select_init (flags);
313	#endif	417	#endif
314		418
315	if (ev_method)	419	if (ev_method)
316	{	420	{
317	evw_init (&sigev, sigcb, 0);	421	evw_init (&sigev, sigcb);
318	siginit ();	422	siginit ();
		423
		424	evsignal_init (&childev, childcb, SIGCHLD);
		425	evsignal_start (&childev);
		426	}
319	}	427	}
320		428
321	return ev_method;	429	return ev_method;
322	}	430	}
323		431
324	/*****************************************************************************/	432	/*****************************************************************************/
325		433
		434	void
326	void ev_prefork (void)	435	ev_prefork (void)
327	{	436	{
		437	/* nop */
328	}	438	}
329		439
		440	void
330	void ev_postfork_parent (void)	441	ev_postfork_parent (void)
331	{	442	{
		443	/* nop */
332	}	444	}
333		445
		446	void
334	void ev_postfork_child (void)	447	ev_postfork_child (void)
335	{	448	{
336	#if HAVE_EPOLL	449	#if HAVE_EPOLL
337	if (ev_method == EVMETHOD_EPOLL)	450	if (ev_method == EVMETHOD_EPOLL)
338	epoll_postfork_child ();	451	epoll_postfork_child ();
339	#endif	452	#endif
…		…
372		485
373	fdchangecnt = 0;	486	fdchangecnt = 0;
374	}	487	}
375		488
376	static void	489	static void
377	call_pending ()	490	call_pending (void)
378	{	491	{
379	int i;	492	while (pendingcnt)
380
381	for (i = 0; i < pendingcnt; ++i)
382	{	493	{
383	ANPENDING *p = pendings + i;	494	ANPENDING *p = pendings + --pendingcnt;
384		495
385	if (p->w)	496	if (p->w)
386	{	497	{
387	p->w->pending = 0;	498	p->w->pending = 0;
388	p->w->cb (p->w, p->events);	499	p->w->cb (p->w, p->events);
389	}	500	}
390	}	501	}
391
392	pendingcnt = 0;
393	}	502	}
394		503
395	static void	504	static void
396	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	505	timers_reify (void)
397	{	506	{
398	while (timercnt && timers [0]->at <= now)	507	while (timercnt && timers [0]->at <= now)
399	{	508	{
400	struct ev_timer *w = timers [0];	509	struct ev_timer *w = timers [0];
		510
		511	event ((W)w, EV_TIMEOUT);
401		512
402	/* first reschedule or stop timer */	513	/* first reschedule or stop timer */
403	if (w->repeat)	514	if (w->repeat)
404	{	515	{
405	if (w->is_abs)
406	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
407	else
408	w->at = now + w->repeat;	516	w->at = now + w->repeat;
409		517	assert (("timer timeout in the past, negative repeat?", w->at > now));
410	assert (w->at > now);
411
412	downheap (timers, timercnt, 0);	518	downheap ((WT *)timers, timercnt, 0);
413	}	519	}
414	else	520	else
415	{
416	evtimer_stop (w); /* nonrepeating: stop timer */	521	evtimer_stop (w); /* nonrepeating: stop timer */
417	--timercnt; /* maybe pass by reference instead? */	522	}
		523	}
		524
		525	static void
		526	periodics_reify (void)
		527	{
		528	while (periodiccnt && periodics [0]->at <= ev_now)
		529	{
		530	struct ev_periodic *w = periodics [0];
		531
		532	/* first reschedule or stop timer */
		533	if (w->interval)
418	}	534	{
		535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));
		537	downheap ((WT *)periodics, periodiccnt, 0);
		538	}
		539	else
		540	evperiodic_stop (w); /* nonrepeating: stop timer */
419		541
420	event ((struct ev_watcher *)w, EV_TIMEOUT);	542	event ((W)w, EV_TIMEOUT);
421	}	543	}
422	}	544	}
423		545
424	static void	546	static void
425	time_update ()	547	periodics_reschedule (ev_tstamp diff)
426	{	548	{
427	int i;	549	int i;
		550
		551	/* adjust periodics after time jump */
		552	for (i = 0; i < periodiccnt; ++i)
		553	{
		554	struct ev_periodic *w = periodics [i];
		555
		556	if (w->interval)
		557	{
		558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		559
		560	if (fabs (diff) >= 1e-4)
		561	{
		562	evperiodic_stop (w);
		563	evperiodic_start (w);
		564
		565	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		566	}
		567	}
		568	}
		569	}
		570
		571	static void
		572	time_update (void)
		573	{
		574	int i;
		575
428	ev_now = ev_time ();	576	ev_now = ev_time ();
429		577
430	if (have_monotonic)	578	if (have_monotonic)
431	{	579	{
432	ev_tstamp odiff = diff;	580	ev_tstamp odiff = diff;
433		581
434	/* detecting time jumps is much more difficult */
435	for (i = 2; --i; ) /* loop a few times, before making important decisions */	582	for (i = 4; --i; ) /* loop a few times, before making important decisions */
436	{	583	{
437	now = get_clock ();	584	now = get_clock ();
438	diff = ev_now - now;	585	diff = ev_now - now;
439		586
440	if (fabs (odiff - diff) < MIN_TIMEJUMP)	587	if (fabs (odiff - diff) < MIN_TIMEJUMP)
441	return; /* all is well */	588	return; /* all is well */
442		589
443	ev_now = ev_time ();	590	ev_now = ev_time ();
444	}	591	}
445		592
446	/* time jump detected, reschedule atimers */	593	periodics_reschedule (diff - odiff);
447	for (i = 0; i < atimercnt; ++i)	594	/* no timer adjustment, as the monotonic clock doesn't jump */
448	{
449	struct ev_timer *w = atimers [i];
450	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
451	}
452	}	595	}
453	else	596	else
454	{	597	{
455	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	598	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
456	/* time jump detected, adjust rtimers */	599	{
		600	periodics_reschedule (ev_now - now);
		601
		602	/* adjust timers. this is easy, as the offset is the same for all */
457	for (i = 0; i < rtimercnt; ++i)	603	for (i = 0; i < timercnt; ++i)
458	rtimers [i]->at += ev_now - now;	604	timers [i]->at += diff;
		605	}
459		606
460	now = ev_now;	607	now = ev_now;
461	}	608	}
462	}	609	}
463		610
464	int ev_loop_done;	611	int ev_loop_done;
465		612
466	void ev_loop (int flags)	613	void ev_loop (int flags)
467	{	614	{
468	double block;	615	double block;
469	ev_loop_done = flags & EVLOOP_ONESHOT;	616	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
470
471	if (checkcnt)
472	{
473	queue_events (checks, checkcnt, EV_CHECK);
474	call_pending ();
475	}
476		617
477	do	618	do
478	{	619	{
		620	/* queue check watchers (and execute them) */
		621	if (preparecnt)
		622	{
		623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		624	call_pending ();
		625	}
		626
479	/* update fd-related kernel structures */	627	/* update fd-related kernel structures */
480	fd_reify ();	628	fd_reify ();
481		629
482	/* calculate blocking time */	630	/* calculate blocking time */
		631
		632	/* we only need this for !monotonic clockor timers, but as we basically
		633	always have timers, we just calculate it always */
		634	ev_now = ev_time ();
		635
483	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	636	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
484	block = 0.;	637	block = 0.;
485	else	638	else
486	{	639	{
487	block = MAX_BLOCKTIME;	640	block = MAX_BLOCKTIME;
488		641
489	if (rtimercnt)	642	if (timercnt)
490	{	643	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
492	if (block > to) block = to;	645	if (block > to) block = to;
493	}	646	}
494		647
495	if (atimercnt)	648	if (periodiccnt)
496	{	649	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
498	if (block > to) block = to;	651	if (block > to) block = to;
499	}	652	}
500		653
501	if (block < 0.) block = 0.;	654	if (block < 0.) block = 0.;
502	}	655	}
…		…
505		658
506	/* update ev_now, do magic */	659	/* update ev_now, do magic */
507	time_update ();	660	time_update ();
508		661
509	/* queue pending timers and reschedule them */	662	/* queue pending timers and reschedule them */
510	/* absolute timers first */	663	timers_reify (); /* relative timers called last */
511	timers_reify (atimers, atimercnt, ev_now);	664	periodics_reify (); /* absolute timers called first */
512	/* relative timers second */
513	timers_reify (rtimers, rtimercnt, now);
514		665
515	/* queue idle watchers unless io or timers are pending */	666	/* queue idle watchers unless io or timers are pending */
516	if (!pendingcnt)	667	if (!pendingcnt)
517	queue_events (idles, idlecnt, EV_IDLE);	668	queue_events ((W *)idles, idlecnt, EV_IDLE);
518		669
519	/* queue check and possibly idle watchers */	670	/* queue check watchers, to be executed first */
		671	if (checkcnt)
520	queue_events (checks, checkcnt, EV_CHECK);	672	queue_events ((W *)checks, checkcnt, EV_CHECK);
521		673
522	call_pending ();	674	call_pending ();
523	}	675	}
524	while (!ev_loop_done);	676	while (!ev_loop_done);
525	}
526		677
527	/*****************************************************************************/	678	if (ev_loop_done != 2)
		679	ev_loop_done = 0;
		680	}
528		681
		682	/*****************************************************************************/
		683
529	static void	684	static void
530	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	685	wlist_add (WL *head, WL elem)
531	{	686	{
532	elem->next = *head;	687	elem->next = *head;
533	*head = elem;	688	*head = elem;
534	}	689	}
535		690
536	static void	691	static void
537	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	692	wlist_del (WL *head, WL elem)
538	{	693	{
539	while (*head)	694	while (*head)
540	{	695	{
541	if (*head == elem)	696	if (*head == elem)
542	{	697	{
…		…
547	head = &(*head)->next;	702	head = &(*head)->next;
548	}	703	}
549	}	704	}
550		705
551	static void	706	static void
552	ev_start (struct ev_watcher *w, int active)	707	ev_clear (W w)
553	{	708	{
		709	if (w->pending)
		710	{
		711	pendings [w->pending - 1].w = 0;
554	w->pending = 0;	712	w->pending = 0;
		713	}
		714	}
		715
		716	static void
		717	ev_start (W w, int active)
		718	{
555	w->active = active;	719	w->active = active;
556	}	720	}
557		721
558	static void	722	static void
559	ev_stop (struct ev_watcher *w)	723	ev_stop (W w)
560	{	724	{
561	if (w->pending)
562	pendings [w->pending - 1].w = 0;
563
564	w->active = 0;	725	w->active = 0;
565	/* nop */
566	}	726	}
567		727
568	/*****************************************************************************/	728	/*****************************************************************************/
569		729
570	void	730	void
…		…
573	if (ev_is_active (w))	733	if (ev_is_active (w))
574	return;	734	return;
575		735
576	int fd = w->fd;	736	int fd = w->fd;
577		737
578	ev_start ((struct ev_watcher *)w, 1);	738	ev_start ((W)w, 1);
579	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
580	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	740	wlist_add ((WL *)&anfds[fd].head, (WL)w);
581		741
582	++fdchangecnt;	742	++fdchangecnt;
583	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
584	fdchanges [fdchangecnt - 1] = fd;	744	fdchanges [fdchangecnt - 1] = fd;
585	}	745	}
586		746
587	void	747	void
588	evio_stop (struct ev_io *w)	748	evio_stop (struct ev_io *w)
589	{	749	{
		750	ev_clear ((W)w);
590	if (!ev_is_active (w))	751	if (!ev_is_active (w))
591	return;	752	return;
592		753
593	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	754	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
594	ev_stop ((struct ev_watcher *)w);	755	ev_stop ((W)w);
595		756
596	++fdchangecnt;	757	++fdchangecnt;
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	758	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = w->fd;	759	fdchanges [fdchangecnt - 1] = w->fd;
599	}	760	}
…		…
602	evtimer_start (struct ev_timer *w)	763	evtimer_start (struct ev_timer *w)
603	{	764	{
604	if (ev_is_active (w))	765	if (ev_is_active (w))
605	return;	766	return;
606		767
607	if (w->is_abs)	768	w->at += now;
		769
		770	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
		771
		772	ev_start ((W)w, ++timercnt);
		773	array_needsize (timers, timermax, timercnt, );
		774	timers [timercnt - 1] = w;
		775	upheap ((WT *)timers, timercnt - 1);
		776	}
		777
		778	void
		779	evtimer_stop (struct ev_timer *w)
		780	{
		781	ev_clear ((W)w);
		782	if (!ev_is_active (w))
		783	return;
		784
		785	if (w->active < timercnt--)
		786	{
		787	timers [w->active - 1] = timers [timercnt];
		788	downheap ((WT *)timers, timercnt, w->active - 1);
608	{	789	}
609	/* this formula differs from the one in timer_reify becuse we do not round up */	790
		791	w->at = w->repeat;
		792
		793	ev_stop ((W)w);
		794	}
		795
		796	void
		797	evtimer_again (struct ev_timer *w)
		798	{
		799	if (ev_is_active (w))
		800	{
610	if (w->repeat)	801	if (w->repeat)
		802	{
		803	w->at = now + w->repeat;
		804	downheap ((WT *)timers, timercnt, w->active - 1);
		805	}
		806	else
		807	evtimer_stop (w);
		808	}
		809	else if (w->repeat)
		810	evtimer_start (w);
		811	}
		812
		813	void
		814	evperiodic_start (struct ev_periodic *w)
		815	{
		816	if (ev_is_active (w))
		817	return;
		818
		819	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
		820
		821	/* this formula differs from the one in periodic_reify because we do not always round up */
		822	if (w->interval)
611	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	823	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
612		824
613	ev_start ((struct ev_watcher *)w, ++atimercnt);	825	ev_start ((W)w, ++periodiccnt);
614	array_needsize (atimers, atimermax, atimercnt, );	826	array_needsize (periodics, periodicmax, periodiccnt, );
615	atimers [atimercnt - 1] = w;	827	periodics [periodiccnt - 1] = w;
616	upheap (atimers, atimercnt - 1);	828	upheap ((WT *)periodics, periodiccnt - 1);
617	}
618	else
619	{
620	w->at += now;
621
622	ev_start ((struct ev_watcher *)w, ++rtimercnt);
623	array_needsize (rtimers, rtimermax, rtimercnt, );
624	rtimers [rtimercnt - 1] = w;
625	upheap (rtimers, rtimercnt - 1);
626	}
627
628	}	829	}
629		830
630	void	831	void
631	evtimer_stop (struct ev_timer *w)	832	evperiodic_stop (struct ev_periodic *w)
632	{	833	{
		834	ev_clear ((W)w);
633	if (!ev_is_active (w))	835	if (!ev_is_active (w))
634	return;	836	return;
635		837
636	if (w->is_abs)
637	{
638	if (w->active < atimercnt--)	838	if (w->active < periodiccnt--)
639	{
640	atimers [w->active - 1] = atimers [atimercnt];
641	downheap (atimers, atimercnt, w->active - 1);
642	}
643	}	839	{
644	else	840	periodics [w->active - 1] = periodics [periodiccnt];
		841	downheap ((WT *)periodics, periodiccnt, w->active - 1);
645	{	842	}
646	if (w->active < rtimercnt--)
647	{
648	rtimers [w->active - 1] = rtimers [rtimercnt];
649	downheap (rtimers, rtimercnt, w->active - 1);
650	}
651	}
652		843
653	ev_stop ((struct ev_watcher *)w);	844	ev_stop ((W)w);
654	}	845	}
655		846
656	void	847	void
657	evsignal_start (struct ev_signal *w)	848	evsignal_start (struct ev_signal *w)
658	{	849	{
659	if (ev_is_active (w))	850	if (ev_is_active (w))
660	return;	851	return;
661		852
662	ev_start ((struct ev_watcher *)w, 1);	853	ev_start ((W)w, 1);
663	array_needsize (signals, signalmax, w->signum, signals_init);	854	array_needsize (signals, signalmax, w->signum, signals_init);
664	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	855	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
665		856
666	if (!w->next)	857	if (!w->next)
667	{	858	{
668	struct sigaction sa;	859	struct sigaction sa;
669	sa.sa_handler = sighandler;	860	sa.sa_handler = sighandler;
…		…
674	}	865	}
675		866
676	void	867	void
677	evsignal_stop (struct ev_signal *w)	868	evsignal_stop (struct ev_signal *w)
678	{	869	{
		870	ev_clear ((W)w);
679	if (!ev_is_active (w))	871	if (!ev_is_active (w))
680	return;	872	return;
681		873
682	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	874	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
683	ev_stop ((struct ev_watcher *)w);	875	ev_stop ((W)w);
684		876
685	if (!signals [w->signum - 1].head)	877	if (!signals [w->signum - 1].head)
686	signal (w->signum, SIG_DFL);	878	signal (w->signum, SIG_DFL);
687	}	879	}
688		880
689	void evidle_start (struct ev_idle *w)	881	void evidle_start (struct ev_idle *w)
690	{	882	{
691	if (ev_is_active (w))	883	if (ev_is_active (w))
692	return;	884	return;
693		885
694	ev_start ((struct ev_watcher *)w, ++idlecnt);	886	ev_start ((W)w, ++idlecnt);
695	array_needsize (idles, idlemax, idlecnt, );	887	array_needsize (idles, idlemax, idlecnt, );
696	idles [idlecnt - 1] = w;	888	idles [idlecnt - 1] = w;
697	}	889	}
698		890
699	void evidle_stop (struct ev_idle *w)	891	void evidle_stop (struct ev_idle *w)
700	{	892	{
		893	ev_clear ((W)w);
		894	if (ev_is_active (w))
		895	return;
		896
701	idles [w->active - 1] = idles [--idlecnt];	897	idles [w->active - 1] = idles [--idlecnt];
702	ev_stop ((struct ev_watcher *)w);	898	ev_stop ((W)w);
		899	}
		900
		901	void evprepare_start (struct ev_prepare *w)
		902	{
		903	if (ev_is_active (w))
		904	return;
		905
		906	ev_start ((W)w, ++preparecnt);
		907	array_needsize (prepares, preparemax, preparecnt, );
		908	prepares [preparecnt - 1] = w;
		909	}
		910
		911	void evprepare_stop (struct ev_prepare *w)
		912	{
		913	ev_clear ((W)w);
		914	if (ev_is_active (w))
		915	return;
		916
		917	prepares [w->active - 1] = prepares [--preparecnt];
		918	ev_stop ((W)w);
703	}	919	}
704		920
705	void evcheck_start (struct ev_check *w)	921	void evcheck_start (struct ev_check *w)
706	{	922	{
707	if (ev_is_active (w))	923	if (ev_is_active (w))
708	return;	924	return;
709		925
710	ev_start ((struct ev_watcher *)w, ++checkcnt);	926	ev_start ((W)w, ++checkcnt);
711	array_needsize (checks, checkmax, checkcnt, );	927	array_needsize (checks, checkmax, checkcnt, );
712	checks [checkcnt - 1] = w;	928	checks [checkcnt - 1] = w;
713	}	929	}
714		930
715	void evcheck_stop (struct ev_check *w)	931	void evcheck_stop (struct ev_check *w)
716	{	932	{
		933	ev_clear ((W)w);
		934	if (ev_is_active (w))
		935	return;
		936
717	checks [w->active - 1] = checks [--checkcnt];	937	checks [w->active - 1] = checks [--checkcnt];
718	ev_stop ((struct ev_watcher *)w);	938	ev_stop ((W)w);
719	}	939	}
720		940
		941	void evchild_start (struct ev_child *w)
		942	{
		943	if (ev_is_active (w))
		944	return;
		945
		946	ev_start ((W)w, 1);
		947	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		948	}
		949
		950	void evchild_stop (struct ev_child *w)
		951	{
		952	ev_clear ((W)w);
		953	if (ev_is_active (w))
		954	return;
		955
		956	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		957	ev_stop ((W)w);
		958	}
		959
721	/*****************************************************************************/	960	/*****************************************************************************/
		961
		962	struct ev_once
		963	{
		964	struct ev_io io;
		965	struct ev_timer to;
		966	void (cb)(int revents, void arg);
		967	void *arg;
		968	};
		969
		970	static void
		971	once_cb (struct ev_once *once, int revents)
		972	{
		973	void (cb)(int revents, void arg) = once->cb;
		974	void *arg = once->arg;
		975
		976	evio_stop (&once->io);
		977	evtimer_stop (&once->to);
		978	free (once);
		979
		980	cb (revents, arg);
		981	}
		982
		983	static void
		984	once_cb_io (struct ev_io *w, int revents)
		985	{
		986	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		987	}
		988
		989	static void
		990	once_cb_to (struct ev_timer *w, int revents)
		991	{
		992	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		993	}
		994
		995	void
		996	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		997	{
		998	struct ev_once *once = malloc (sizeof (struct ev_once));
		999
		1000	if (!once)
		1001	cb (EV_ERROR, arg);
		1002	else
		1003	{
		1004	once->cb = cb;
		1005	once->arg = arg;
		1006
		1007	evw_init (&once->io, once_cb_io);
		1008
		1009	if (fd >= 0)
		1010	{
		1011	evio_set (&once->io, fd, events);
		1012	evio_start (&once->io);
		1013	}
		1014
		1015	evw_init (&once->to, once_cb_to);
		1016
		1017	if (timeout >= 0.)
		1018	{
		1019	evtimer_set (&once->to, timeout, 0.);
		1020	evtimer_start (&once->to);
		1021	}
		1022	}
		1023	}
		1024
		1025	/*****************************************************************************/
		1026
722	#if 1	1027	#if 0
		1028
		1029	struct ev_io wio;
723		1030
724	static void	1031	static void
725	sin_cb (struct ev_io *w, int revents)	1032	sin_cb (struct ev_io *w, int revents)
726	{	1033	{
727	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1034	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
737		1044
738	static void	1045	static void
739	scb (struct ev_signal *w, int revents)	1046	scb (struct ev_signal *w, int revents)
740	{	1047	{
741	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1048	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1049	evio_stop (&wio);
		1050	evio_start (&wio);
742	}	1051	}
743		1052
744	static void	1053	static void
745	gcb (struct ev_signal *w, int revents)	1054	gcb (struct ev_signal *w, int revents)
746	{	1055	{
747	fprintf (stderr, "generic %x\n", revents);	1056	fprintf (stderr, "generic %x\n", revents);
		1057
748	}	1058	}
749		1059
750	int main (void)	1060	int main (void)
751	{	1061	{
752	struct ev_io sin;
753
754	ev_init (0);	1062	ev_init (0);
755		1063
756	evw_init (&sin, sin_cb, 55);
757	evio_set (&sin, 0, EV_READ);	1064	evio_init (&wio, sin_cb, 0, EV_READ);
758	evio_start (&sin);	1065	evio_start (&wio);
759		1066
760	struct ev_timer t[10000];	1067	struct ev_timer t[10000];
761		1068
762	#if 0	1069	#if 0
763	int i;	1070	int i;
764	for (i = 0; i < 10000; ++i)	1071	for (i = 0; i < 10000; ++i)
765	{	1072	{
766	struct ev_timer *w = t + i;	1073	struct ev_timer *w = t + i;
767	evw_init (w, ocb, i);	1074	evw_init (w, ocb, i);
768	evtimer_set_abs (w, drand48 (), 0.99775533);	1075	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
769	evtimer_start (w);	1076	evtimer_start (w);
770	if (drand48 () < 0.5)	1077	if (drand48 () < 0.5)
771	evtimer_stop (w);	1078	evtimer_stop (w);
772	}	1079	}
773	#endif	1080	#endif
774		1081
775	struct ev_timer t1;	1082	struct ev_timer t1;
776	evw_init (&t1, ocb, 0);	1083	evtimer_init (&t1, ocb, 5, 10);
777	evtimer_set_abs (&t1, 5, 10);
778	evtimer_start (&t1);	1084	evtimer_start (&t1);
779		1085
780	struct ev_signal sig;	1086	struct ev_signal sig;
781	evw_init (&sig, scb, 65535);
782	evsignal_set (&sig, SIGQUIT);	1087	evsignal_init (&sig, scb, SIGQUIT);
783	evsignal_start (&sig);	1088	evsignal_start (&sig);
784		1089
785	struct ev_check cw;	1090	struct ev_check cw;
786	evw_init (&cw, gcb, 0);	1091	evcheck_init (&cw, gcb);
787	evcheck_start (&cw);	1092	evcheck_start (&cw);
788		1093
789	struct ev_idle iw;	1094	struct ev_idle iw;
790	evw_init (&iw, gcb, 0);	1095	evidle_init (&iw, gcb);
791	evidle_start (&iw);	1096	evidle_start (&iw);
792		1097
793	ev_loop (0);	1098	ev_loop (0);
794		1099
795	return 0;	1100	return 0;

Diff Legend

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

Comparing libev/ev.c (file contents): Revision 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs. Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs.
Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC