[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 1.24 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	/*****************************************************************************/	191	static void
		192	queue_events (W *events, int eventcnt, int type)
		193	{
		194	int i;
145		195
		196	for (i = 0; i < eventcnt; ++i)
		197	event (events [i], type);
		198	}
		199
		200	/* called on EBADF to verify fds */
		201	static void
		202	fd_recheck (void)
		203	{
		204	int fd;
		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
146	static struct ev_timer **atimers;	218	static struct ev_timer **timers;
147	static int atimermax, atimercnt;	219	static int timermax, timercnt;
148		220
149	static struct ev_timer **rtimers;	221	static struct ev_periodic **periodics;
150	static int rtimermax, rtimercnt;	222	static int periodicmax, periodiccnt;
151		223
152	static void	224	static void
153	upheap (struct ev_timer **timers, int k)	225	upheap (WT *timers, int k)
154	{	226	{
155	struct ev_timer *w = timers [k];	227	WT w = timers [k];
156		228
157	while (k && timers [k >> 1]->at > w->at)	229	while (k && timers [k >> 1]->at > w->at)
158	{	230	{
159	timers [k] = timers [k >> 1];	231	timers [k] = timers [k >> 1];
160	timers [k]->active = k + 1;	232	timers [k]->active = k + 1;
…		…
165	timers [k]->active = k + 1;	237	timers [k]->active = k + 1;
166		238
167	}	239	}
168		240
169	static void	241	static void
170	downheap (struct ev_timer **timers, int N, int k)	242	downheap (WT *timers, int N, int k)
171	{	243	{
172	struct ev_timer *w = timers [k];	244	WT w = timers [k];
173		245
174	while (k < (N >> 1))	246	while (k < (N >> 1))
175	{	247	{
176	int j = k << 1;	248	int j = k << 1;
177		249
…		…
241	if (signals [sig].gotsig)	313	if (signals [sig].gotsig)
242	{	314	{
243	signals [sig].gotsig = 0;	315	signals [sig].gotsig = 0;
244		316
245	for (w = signals [sig].head; w; w = w->next)	317	for (w = signals [sig].head; w; w = w->next)
246	event ((struct ev_watcher *)w, EV_SIGNAL);	318	event ((W)w, EV_SIGNAL);
247	}	319	}
248	}	320	}
249		321
250	static void	322	static void
251	siginit (void)	323	siginit (void)
…		…
261	evio_start (&sigev);	333	evio_start (&sigev);
262	}	334	}
263		335
264	/*****************************************************************************/	336	/*****************************************************************************/
265		337
		338	static struct ev_idle **idles;
		339	static int idlemax, idlecnt;
		340
		341	static struct ev_prepare **prepares;
		342	static int preparemax, preparecnt;
		343
		344	static struct ev_check **checks;
		345	static int checkmax, checkcnt;
		346
		347	/*****************************************************************************/
		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
266	#if HAVE_EPOLL	373	#if HAVE_EPOLL
267	# include "ev_epoll.c"	374	# include "ev_epoll.c"
268	#endif	375	#endif
269	#if HAVE_SELECT	376	#if HAVE_SELECT
270	# include "ev_select.c"	377	# include "ev_select.c"
271	#endif	378	#endif
272		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
273	int ev_init (int flags)	392	int ev_init (int flags)
274	{	393	{
		394	if (!ev_method)
		395	{
275	#if HAVE_MONOTONIC	396	#if HAVE_MONOTONIC
276	{	397	{
277	struct timespec ts;	398	struct timespec ts;
278	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
279	have_monotonic = 1;	400	have_monotonic = 1;
280	}	401	}
281	#endif	402	#endif
282		403
283	ev_now = ev_time ();	404	ev_now = ev_time ();
284	now = get_clock ();	405	now = get_clock ();
285	diff = ev_now - now;	406	diff = ev_now - now;
286		407
287	if (pipe (sigpipe))	408	if (pipe (sigpipe))
288	return 0;	409	return 0;
289		410
290	ev_method = EVMETHOD_NONE;	411	ev_method = EVMETHOD_NONE;
291	#if HAVE_EPOLL	412	#if HAVE_EPOLL
292	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
293	#endif	414	#endif
294	#if HAVE_SELECT	415	#if HAVE_SELECT
295	if (ev_method == EVMETHOD_NONE) select_init (flags);	416	if (ev_method == EVMETHOD_NONE) select_init (flags);
296	#endif	417	#endif
297		418
298	if (ev_method)	419	if (ev_method)
299	{	420	{
300	evw_init (&sigev, sigcb, 0);	421	evw_init (&sigev, sigcb);
301	siginit ();	422	siginit ();
		423
		424	evsignal_init (&childev, childcb, SIGCHLD);
		425	evsignal_start (&childev);
		426	}
302	}	427	}
303		428
304	return ev_method;	429	return ev_method;
305	}	430	}
306		431
307	/*****************************************************************************/	432	/*****************************************************************************/
308		433
		434	void
309	void ev_prefork (void)	435	ev_prefork (void)
310	{	436	{
		437	/* nop */
311	}	438	}
312		439
		440	void
313	void ev_postfork_parent (void)	441	ev_postfork_parent (void)
314	{	442	{
		443	/* nop */
315	}	444	}
316		445
		446	void
317	void ev_postfork_child (void)	447	ev_postfork_child (void)
318	{	448	{
319	#if HAVE_EPOLL	449	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_EPOLL)	450	if (ev_method == EVMETHOD_EPOLL)
321	epoll_postfork_child ();	451	epoll_postfork_child ();
322	#endif	452	#endif
…		…
328	siginit ();	458	siginit ();
329	}	459	}
330		460
331	/*****************************************************************************/	461	/*****************************************************************************/
332		462
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	463	static void
355	fd_reify (void)	464	fd_reify (void)
356	{	465	{
357	int i;	466	int i;
358		467
…		…
376		485
377	fdchangecnt = 0;	486	fdchangecnt = 0;
378	}	487	}
379		488
380	static void	489	static void
381	call_pending ()	490	call_pending (void)
382	{	491	{
383	int i;	492	while (pendingcnt)
384
385	for (i = 0; i < pendingcnt; ++i)
386	{	493	{
387	ANPENDING *p = pendings + i;	494	ANPENDING *p = pendings + --pendingcnt;
388		495
389	if (p->w)	496	if (p->w)
390	{	497	{
391	p->w->pending = 0;	498	p->w->pending = 0;
392	p->w->cb (p->w, p->events);	499	p->w->cb (p->w, p->events);
393	}	500	}
394	}	501	}
395
396	pendingcnt = 0;
397	}	502	}
398		503
399	static void	504	static void
400	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	505	timers_reify (void)
401	{	506	{
402	while (timercnt && timers [0]->at <= now)	507	while (timercnt && timers [0]->at <= now)
403	{	508	{
404	struct ev_timer *w = timers [0];	509	struct ev_timer *w = timers [0];
		510
		511	event ((W)w, EV_TIMEOUT);
405		512
406	/* first reschedule or stop timer */	513	/* first reschedule or stop timer */
407	if (w->repeat)	514	if (w->repeat)
408	{	515	{
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;	516	w->at = now + w->repeat;
413		517	assert (("timer timeout in the past, negative repeat?", w->at > now));
414	assert (w->at > now);
415
416	downheap (timers, timercnt, 0);	518	downheap ((WT *)timers, timercnt, 0);
417	}	519	}
418	else	520	else
419	{
420	evtimer_stop (w); /* nonrepeating: stop timer */	521	evtimer_stop (w); /* nonrepeating: stop timer */
421	--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)
422	}	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 */
423		541
424	event ((struct ev_watcher *)w, EV_TIMEOUT);	542	event ((W)w, EV_TIMEOUT);
425	}	543	}
426	}	544	}
427		545
428	static void	546	static void
429	time_update ()	547	periodics_reschedule (ev_tstamp diff)
430	{	548	{
431	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
432	ev_now = ev_time ();	576	ev_now = ev_time ();
433		577
434	if (have_monotonic)	578	if (have_monotonic)
435	{	579	{
436	ev_tstamp odiff = diff;	580	ev_tstamp odiff = diff;
437		581
438	/* detecting time jumps is much more difficult */
439	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 */
440	{	583	{
441	now = get_clock ();	584	now = get_clock ();
442	diff = ev_now - now;	585	diff = ev_now - now;
443		586
444	if (fabs (odiff - diff) < MIN_TIMEJUMP)	587	if (fabs (odiff - diff) < MIN_TIMEJUMP)
445	return; /* all is well */	588	return; /* all is well */
446		589
447	ev_now = ev_time ();	590	ev_now = ev_time ();
448	}	591	}
449		592
450	/* time jump detected, reschedule atimers */	593	periodics_reschedule (diff - odiff);
451	for (i = 0; i < atimercnt; ++i)	594	/* 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	}	595	}
457	else	596	else
458	{	597	{
459	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	598	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
460	/* 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 */
461	for (i = 0; i < rtimercnt; ++i)	603	for (i = 0; i < timercnt; ++i)
462	rtimers [i]->at += ev_now - now;	604	timers [i]->at += diff;
		605	}
463		606
464	now = ev_now;	607	now = ev_now;
465	}	608	}
466	}	609	}
467		610
468	int ev_loop_done;	611	int ev_loop_done;
469		612
470	void ev_loop (int flags)	613	void ev_loop (int flags)
471	{	614	{
472	double block;	615	double block;
473	ev_loop_done = flags & EVLOOP_ONESHOT;	616	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
474		617
475	do	618	do
476	{	619	{
477	hook_call (EVHOOK_PREPOLL);	620	/* queue check watchers (and execute them) */
		621	if (preparecnt)
		622	{
		623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		624	call_pending ();
		625	}
478		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)	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	}
…		…
504	method_poll (block);	657	method_poll (block);
505		658
506	/* update ev_now, do magic */	659	/* update ev_now, do magic */
507	time_update ();	660	time_update ();
508		661
509	hook_call (EVHOOK_POSTPOLL);
510
511	/* put pending timers into pendign queue and reschedule them */	662	/* queue pending timers and reschedule them */
512	/* absolute timers first */	663	timers_reify (); /* relative timers called last */
513	timers_reify (atimers, atimercnt, ev_now);	664	periodics_reify (); /* absolute timers called first */
514	/* relative timers second */	665
515	timers_reify (rtimers, rtimercnt, now);	666	/* queue idle watchers unless io or timers are pending */
		667	if (!pendingcnt)
		668	queue_events ((W *)idles, idlecnt, EV_IDLE);
		669
		670	/* queue check watchers, to be executed first */
		671	if (checkcnt)
		672	queue_events ((W *)checks, checkcnt, EV_CHECK);
516		673
517	call_pending ();	674	call_pending ();
518	}	675	}
519	while (!ev_loop_done);	676	while (!ev_loop_done);
520	}
521		677
522	/*****************************************************************************/	678	if (ev_loop_done != 2)
		679	ev_loop_done = 0;
		680	}
523		681
		682	/*****************************************************************************/
		683
524	static void	684	static void
525	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	685	wlist_add (WL *head, WL elem)
526	{	686	{
527	elem->next = *head;	687	elem->next = *head;
528	*head = elem;	688	*head = elem;
529	}	689	}
530		690
531	static void	691	static void
532	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	692	wlist_del (WL *head, WL elem)
533	{	693	{
534	while (*head)	694	while (*head)
535	{	695	{
536	if (*head == elem)	696	if (*head == elem)
537	{	697	{
…		…
542	head = &(*head)->next;	702	head = &(*head)->next;
543	}	703	}
544	}	704	}
545		705
546	static void	706	static void
547	ev_start (struct ev_watcher *w, int active)	707	ev_clear (W w)
548	{	708	{
		709	if (w->pending)
		710	{
		711	pendings [w->pending - 1].w = 0;
549	w->pending = 0;	712	w->pending = 0;
		713	}
		714	}
		715
		716	static void
		717	ev_start (W w, int active)
		718	{
550	w->active = active;	719	w->active = active;
551	}	720	}
552		721
553	static void	722	static void
554	ev_stop (struct ev_watcher *w)	723	ev_stop (W w)
555	{	724	{
556	if (w->pending)
557	pendings [w->pending - 1].w = 0;
558
559	w->active = 0;	725	w->active = 0;
560	/* nop */
561	}	726	}
562		727
563	/*****************************************************************************/	728	/*****************************************************************************/
564		729
565	void	730	void
…		…
568	if (ev_is_active (w))	733	if (ev_is_active (w))
569	return;	734	return;
570		735
571	int fd = w->fd;	736	int fd = w->fd;
572		737
573	ev_start ((struct ev_watcher *)w, 1);	738	ev_start ((W)w, 1);
574	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
575	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	740	wlist_add ((WL *)&anfds[fd].head, (WL)w);
576		741
577	++fdchangecnt;	742	++fdchangecnt;
578	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
579	fdchanges [fdchangecnt - 1] = fd;	744	fdchanges [fdchangecnt - 1] = fd;
580	}	745	}
581		746
582	void	747	void
583	evio_stop (struct ev_io *w)	748	evio_stop (struct ev_io *w)
584	{	749	{
		750	ev_clear ((W)w);
585	if (!ev_is_active (w))	751	if (!ev_is_active (w))
586	return;	752	return;
587		753
588	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);
589	ev_stop ((struct ev_watcher *)w);	755	ev_stop ((W)w);
590		756
591	++fdchangecnt;	757	++fdchangecnt;
592	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	758	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
593	fdchanges [fdchangecnt - 1] = w->fd;	759	fdchanges [fdchangecnt - 1] = w->fd;
594	}	760	}
…		…
597	evtimer_start (struct ev_timer *w)	763	evtimer_start (struct ev_timer *w)
598	{	764	{
599	if (ev_is_active (w))	765	if (ev_is_active (w))
600	return;	766	return;
601		767
602	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);
603	{	789	}
604	/* 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	{
605	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)
606	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	823	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
607		824
608	ev_start ((struct ev_watcher *)w, ++atimercnt);	825	ev_start ((W)w, ++periodiccnt);
609	array_needsize (atimers, atimermax, atimercnt, );	826	array_needsize (periodics, periodicmax, periodiccnt, );
610	atimers [atimercnt - 1] = w;	827	periodics [periodiccnt - 1] = w;
611	upheap (atimers, atimercnt - 1);	828	upheap ((WT *)periodics, periodiccnt - 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	}	829	}
624		830
625	void	831	void
626	evtimer_stop (struct ev_timer *w)	832	evperiodic_stop (struct ev_periodic *w)
627	{	833	{
		834	ev_clear ((W)w);
628	if (!ev_is_active (w))	835	if (!ev_is_active (w))
629	return;	836	return;
630		837
631	if (w->is_abs)
632	{
633	if (w->active < atimercnt--)	838	if (w->active < periodiccnt--)
634	{
635	atimers [w->active - 1] = atimers [atimercnt];
636	downheap (atimers, atimercnt, w->active - 1);
637	}
638	}	839	{
639	else	840	periodics [w->active - 1] = periodics [periodiccnt];
		841	downheap ((WT *)periodics, periodiccnt, w->active - 1);
640	{	842	}
641	if (w->active < rtimercnt--)
642	{
643	rtimers [w->active - 1] = rtimers [rtimercnt];
644	downheap (rtimers, rtimercnt, w->active - 1);
645	}
646	}
647		843
648	ev_stop ((struct ev_watcher *)w);	844	ev_stop ((W)w);
649	}	845	}
650		846
651	void	847	void
652	evsignal_start (struct ev_signal *w)	848	evsignal_start (struct ev_signal *w)
653	{	849	{
654	if (ev_is_active (w))	850	if (ev_is_active (w))
655	return;	851	return;
656		852
657	ev_start ((struct ev_watcher *)w, 1);	853	ev_start ((W)w, 1);
658	array_needsize (signals, signalmax, w->signum, signals_init);	854	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);	855	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
660		856
661	if (!w->next)	857	if (!w->next)
662	{	858	{
663	struct sigaction sa;	859	struct sigaction sa;
664	sa.sa_handler = sighandler;	860	sa.sa_handler = sighandler;
…		…
669	}	865	}
670		866
671	void	867	void
672	evsignal_stop (struct ev_signal *w)	868	evsignal_stop (struct ev_signal *w)
673	{	869	{
		870	ev_clear ((W)w);
674	if (!ev_is_active (w))	871	if (!ev_is_active (w))
675	return;	872	return;
676		873
677	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);
678	ev_stop ((struct ev_watcher *)w);	875	ev_stop ((W)w);
679		876
680	if (!signals [w->signum - 1].head)	877	if (!signals [w->signum - 1].head)
681	signal (w->signum, SIG_DFL);	878	signal (w->signum, SIG_DFL);
682	}	879	}
683		880
		881	void evidle_start (struct ev_idle *w)
		882	{
		883	if (ev_is_active (w))
		884	return;
		885
		886	ev_start ((W)w, ++idlecnt);
		887	array_needsize (idles, idlemax, idlecnt, );
		888	idles [idlecnt - 1] = w;
		889	}
		890
		891	void evidle_stop (struct ev_idle *w)
		892	{
		893	ev_clear ((W)w);
		894	if (ev_is_active (w))
		895	return;
		896
		897	idles [w->active - 1] = idles [--idlecnt];
		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);
		919	}
		920
		921	void evcheck_start (struct ev_check *w)
		922	{
		923	if (ev_is_active (w))
		924	return;
		925
		926	ev_start ((W)w, ++checkcnt);
		927	array_needsize (checks, checkmax, checkcnt, );
		928	checks [checkcnt - 1] = w;
		929	}
		930
		931	void evcheck_stop (struct ev_check *w)
		932	{
		933	ev_clear ((W)w);
		934	if (ev_is_active (w))
		935	return;
		936
		937	checks [w->active - 1] = checks [--checkcnt];
		938	ev_stop ((W)w);
		939	}
		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
684	/*****************************************************************************/	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
685	#if 1	1027	#if 0
		1028
		1029	struct ev_io wio;
686		1030
687	static void	1031	static void
688	sin_cb (struct ev_io *w, int revents)	1032	sin_cb (struct ev_io *w, int revents)
689	{	1033	{
690	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1034	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
700		1044
701	static void	1045	static void
702	scb (struct ev_signal *w, int revents)	1046	scb (struct ev_signal *w, int revents)
703	{	1047	{
704	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);
		1051	}
		1052
		1053	static void
		1054	gcb (struct ev_signal *w, int revents)
		1055	{
		1056	fprintf (stderr, "generic %x\n", revents);
		1057
705	}	1058	}
706		1059
707	int main (void)	1060	int main (void)
708	{	1061	{
709	struct ev_io sin;
710
711	ev_init (0);	1062	ev_init (0);
712		1063
713	evw_init (&sin, sin_cb, 55);
714	evio_set (&sin, 0, EV_READ);	1064	evio_init (&wio, sin_cb, 0, EV_READ);
715	evio_start (&sin);	1065	evio_start (&wio);
716		1066
717	struct ev_timer t[10000];	1067	struct ev_timer t[10000];
718		1068
719	#if 1	1069	#if 0
720	int i;	1070	int i;
721	for (i = 0; i < 10000; ++i)	1071	for (i = 0; i < 10000; ++i)
722	{	1072	{
723	struct ev_timer *w = t + i;	1073	struct ev_timer *w = t + i;
724	evw_init (w, ocb, i);	1074	evw_init (w, ocb, i);
725	evtimer_set_abs (w, drand48 (), 0.99775533);	1075	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
726	evtimer_start (w);	1076	evtimer_start (w);
727	if (drand48 () < 0.5)	1077	if (drand48 () < 0.5)
728	evtimer_stop (w);	1078	evtimer_stop (w);
729	}	1079	}
730	#endif	1080	#endif
731		1081
732	struct ev_timer t1;	1082	struct ev_timer t1;
733	evw_init (&t1, ocb, 0);	1083	evtimer_init (&t1, ocb, 5, 10);
734	evtimer_set_abs (&t1, 5, 10);
735	evtimer_start (&t1);	1084	evtimer_start (&t1);
736		1085
737	struct ev_signal sig;	1086	struct ev_signal sig;
738	evw_init (&sig, scb, 65535);
739	evsignal_set (&sig, SIGQUIT);	1087	evsignal_init (&sig, scb, SIGQUIT);
740	evsignal_start (&sig);	1088	evsignal_start (&sig);
741		1089
		1090	struct ev_check cw;
		1091	evcheck_init (&cw, gcb);
		1092	evcheck_start (&cw);
		1093
		1094	struct ev_idle iw;
		1095	evidle_init (&iw, gcb);
		1096	evidle_start (&iw);
		1097
742	ev_loop (0);	1098	ev_loop (0);
743		1099
744	return 0;	1100	return 0;
745	}	1101	}
746		1102

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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 1.24 by root, Wed Oct 31 20:46:44 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 1.24 by root, Wed Oct 31 20:46:44 2007 UTC