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

Comparing libev/ev.c (file contents):
Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs.
Revision 1.27 by root, Wed Oct 31 22:16:36 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
14	#ifndef HAVE_MONOTONIC	46	#ifndef HAVE_MONOTONIC
15	# ifdef CLOCK_MONOTONIC	47	# ifdef CLOCK_MONOTONIC
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */
30	#endif	62	#endif
31		63
32	#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) */
33	#define MAX_BLOCKTIME 60.	65	#define MAX_BLOCKTIME 60.
		66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */
34		67
35	#include "ev.h"	68	#include "ev.h"
36
37	struct ev_watcher {
38	EV_WATCHER (ev_watcher);
39	};
40
41	struct ev_watcher_list {
42	EV_WATCHER_LIST (ev_watcher_list);
43	};
44		69
45	typedef struct ev_watcher *W;	70	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	71	typedef struct ev_watcher_list *WL;
		72	typedef struct ev_watcher_time *WT;
47		73
48	static ev_tstamp now, diff; /* monotonic clock */	74	static ev_tstamp now, diff; /* monotonic clock */
49	ev_tstamp ev_now;	75	ev_tstamp ev_now;
50	int ev_method;	76	int ev_method;
51		77
…		…
87	}	113	}
88		114
89	#define array_needsize(base,cur,cnt,init) \	115	#define array_needsize(base,cur,cnt,init) \
90	if ((cnt) > cur) \	116	if ((cnt) > cur) \
91	{ \	117	{ \
92	int newcnt = cur ? cur << 1 : 16; \	118	int newcnt = cur; \
93	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	\
94	base = realloc (base, sizeof (base) (newcnt)); \	125	base = realloc (base, sizeof (base) (newcnt)); \
95	init (base + cur, newcnt - cur); \	126	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	127	cur = newcnt; \
97	}	128	}
98		129
99	/*****************************************************************************/	130	/*****************************************************************************/
100		131
101	typedef struct	132	typedef struct
102	{	133	{
103	struct ev_io *head;	134	struct ev_io *head;
104	unsigned char wev, rev; /* want, received event set */	135	int events;
105	} ANFD;	136	} ANFD;
106		137
107	static ANFD *anfds;	138	static ANFD *anfds;
108	static int anfdmax;	139	static int anfdmax;
109		140
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	141	static void
114	anfds_init (ANFD *base, int count)	142	anfds_init (ANFD *base, int count)
115	{	143	{
116	while (count--)	144	while (count--)
117	{	145	{
118	base->head = 0;	146	base->head = 0;
119	base->wev = base->rev = EV_NONE;	147	base->events = EV_NONE;
120	++base;	148	++base;
121	}	149	}
122	}	150	}
123		151
124	typedef struct	152	typedef struct
…		…
131	static int pendingmax, pendingcnt;	159	static int pendingmax, pendingcnt;
132		160
133	static void	161	static void
134	event (W w, int events)	162	event (W w, int events)
135	{	163	{
		164	if (w->active)
		165	{
136	w->pending = ++pendingcnt;	166	w->pending = ++pendingcnt;
137	array_needsize (pendings, pendingmax, pendingcnt, );	167	array_needsize (pendings, pendingmax, pendingcnt, );
138	pendings [pendingcnt - 1].w = w;	168	pendings [pendingcnt - 1].w = w;
139	pendings [pendingcnt - 1].events = events;	169	pendings [pendingcnt - 1].events = events;
		170	}
		171	}
		172
		173	static void
		174	queue_events (W *events, int eventcnt, int type)
		175	{
		176	int i;
		177
		178	for (i = 0; i < eventcnt; ++i)
		179	event (events [i], type);
140	}	180	}
141		181
142	static void	182	static void
143	fd_event (int fd, int events)	183	fd_event (int fd, int events)
144	{	184	{
…		…
152	if (ev)	192	if (ev)
153	event ((W)w, ev);	193	event ((W)w, ev);
154	}	194	}
155	}	195	}
156		196
		197	/*****************************************************************************/
		198
		199	static int *fdchanges;
		200	static int fdchangemax, fdchangecnt;
		201
157	static void	202	static void
158	queue_events (W *events, int eventcnt, int type)	203	fd_reify (void)
159	{	204	{
160	int i;	205	int i;
161		206
162	for (i = 0; i < eventcnt; ++i)	207	for (i = 0; i < fdchangecnt; ++i)
163	event (events [i], type);	208	{
164	}	209	int fd = fdchanges [i];
		210	ANFD *anfd = anfds + fd;
		211	struct ev_io *w;
165		212
166	/*****************************************************************************/	213	int events = 0;
167		214
		215	for (w = anfd->head; w; w = w->next)
		216	events \|= w->events;
		217
		218	anfd->events &= ~EV_REIFY;
		219
		220	if (anfd->events != events)
		221	{
		222	method_modify (fd, anfd->events, events);
		223	anfd->events = events;
		224	}
		225	}
		226
		227	fdchangecnt = 0;
		228	}
		229
		230	static void
		231	fd_change (int fd)
		232	{
		233	if (anfds [fd].events & EV_REIFY)
		234	return;
		235
		236	anfds [fd].events \|= EV_REIFY;
		237
		238	++fdchangecnt;
		239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		240	fdchanges [fdchangecnt - 1] = fd;
		241	}
		242
		243	/* called on EBADF to verify fds */
		244	static void
		245	fd_recheck (void)
		246	{
		247	int fd;
		248
		249	for (fd = 0; fd < anfdmax; ++fd)
		250	if (anfds [fd].events)
		251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		252	while (anfds [fd].head)
		253	{
		254	event ((W)anfds [fd].head, EV_ERROR);
		255	evio_stop (anfds [fd].head);
		256	}
		257	}
		258
		259	/*****************************************************************************/
		260
168	static struct ev_timer **atimers;	261	static struct ev_timer **timers;
169	static int atimermax, atimercnt;	262	static int timermax, timercnt;
170		263
171	static struct ev_timer **rtimers;	264	static struct ev_periodic **periodics;
172	static int rtimermax, rtimercnt;	265	static int periodicmax, periodiccnt;
173		266
174	static void	267	static void
175	upheap (struct ev_timer **timers, int k)	268	upheap (WT *timers, int k)
176	{	269	{
177	struct ev_timer *w = timers [k];	270	WT w = timers [k];
178		271
179	while (k && timers [k >> 1]->at > w->at)	272	while (k && timers [k >> 1]->at > w->at)
180	{	273	{
181	timers [k] = timers [k >> 1];	274	timers [k] = timers [k >> 1];
182	timers [k]->active = k + 1;	275	timers [k]->active = k + 1;
…		…
187	timers [k]->active = k + 1;	280	timers [k]->active = k + 1;
188		281
189	}	282	}
190		283
191	static void	284	static void
192	downheap (struct ev_timer **timers, int N, int k)	285	downheap (WT *timers, int N, int k)
193	{	286	{
194	struct ev_timer *w = timers [k];	287	WT w = timers [k];
195		288
196	while (k < (N >> 1))	289	while (k < (N >> 1))
197	{	290	{
198	int j = k << 1;	291	int j = k << 1;
199		292
…		…
286	/*****************************************************************************/	379	/*****************************************************************************/
287		380
288	static struct ev_idle **idles;	381	static struct ev_idle **idles;
289	static int idlemax, idlecnt;	382	static int idlemax, idlecnt;
290		383
		384	static struct ev_prepare **prepares;
		385	static int preparemax, preparecnt;
		386
291	static struct ev_check **checks;	387	static struct ev_check **checks;
292	static int checkmax, checkcnt;	388	static int checkmax, checkcnt;
293		389
294	/*****************************************************************************/	390	/*****************************************************************************/
295		391
		392	static struct ev_child *childs [PID_HASHSIZE];
		393	static struct ev_signal childev;
		394
		395	#ifndef WCONTINUED
		396	# define WCONTINUED 0
		397	#endif
		398
		399	static void
		400	childcb (struct ev_signal *sw, int revents)
		401	{
		402	struct ev_child *w;
		403	int pid, status;
		404
		405	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)
		406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
		407	if (w->pid == pid \|\| w->pid == -1)
		408	{
		409	w->status = status;
		410	event ((W)w, EV_CHILD);
		411	}
		412	}
		413
		414	/*****************************************************************************/
		415
296	#if HAVE_EPOLL	416	#if HAVE_EPOLL
297	# include "ev_epoll.c"	417	# include "ev_epoll.c"
298	#endif	418	#endif
299	#if HAVE_SELECT	419	#if HAVE_SELECT
300	# include "ev_select.c"	420	# include "ev_select.c"
301	#endif	421	#endif
302		422
		423	int
		424	ev_version_major (void)
		425	{
		426	return EV_VERSION_MAJOR;
		427	}
		428
		429	int
		430	ev_version_minor (void)
		431	{
		432	return EV_VERSION_MINOR;
		433	}
		434
303	int ev_init (int flags)	435	int ev_init (int flags)
304	{	436	{
		437	if (!ev_method)
		438	{
305	#if HAVE_MONOTONIC	439	#if HAVE_MONOTONIC
306	{	440	{
307	struct timespec ts;	441	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;	443	have_monotonic = 1;
310	}	444	}
311	#endif	445	#endif
312		446
313	ev_now = ev_time ();	447	ev_now = ev_time ();
314	now = get_clock ();	448	now = get_clock ();
315	diff = ev_now - now;	449	diff = ev_now - now;
316		450
317	if (pipe (sigpipe))	451	if (pipe (sigpipe))
318	return 0;	452	return 0;
319		453
320	ev_method = EVMETHOD_NONE;	454	ev_method = EVMETHOD_NONE;
321	#if HAVE_EPOLL	455	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif	457	#endif
324	#if HAVE_SELECT	458	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);	459	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif	460	#endif
327		461
328	if (ev_method)	462	if (ev_method)
329	{	463	{
330	evw_init (&sigev, sigcb, 0);	464	evw_init (&sigev, sigcb);
331	siginit ();	465	siginit ();
		466
		467	evsignal_init (&childev, childcb, SIGCHLD);
		468	evsignal_start (&childev);
		469	}
332	}	470	}
333		471
334	return ev_method;	472	return ev_method;
335	}	473	}
336		474
337	/*****************************************************************************/	475	/*****************************************************************************/
338		476
		477	void
339	void ev_prefork (void)	478	ev_prefork (void)
340	{	479	{
		480	/* nop */
341	}	481	}
342		482
		483	void
343	void ev_postfork_parent (void)	484	ev_postfork_parent (void)
344	{	485	{
		486	/* nop */
345	}	487	}
346		488
		489	void
347	void ev_postfork_child (void)	490	ev_postfork_child (void)
348	{	491	{
349	#if HAVE_EPOLL	492	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)	493	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();	494	epoll_postfork_child ();
352	#endif	495	#endif
…		…
359	}	502	}
360		503
361	/*****************************************************************************/	504	/*****************************************************************************/
362		505
363	static void	506	static void
364	fd_reify (void)
365	{
366	int i;
367
368	for (i = 0; i < fdchangecnt; ++i)
369	{
370	int fd = fdchanges [i];
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373
374	int wev = 0;
375
376	for (w = anfd->head; w; w = w->next)
377	wev \|= w->events;
378
379	if (anfd->wev != wev)
380	{
381	method_modify (fd, anfd->wev, wev);
382	anfd->wev = wev;
383	}
384	}
385
386	fdchangecnt = 0;
387	}
388
389	static void
390	call_pending ()	507	call_pending (void)
391	{	508	{
392	int i;	509	while (pendingcnt)
393
394	for (i = 0; i < pendingcnt; ++i)
395	{	510	{
396	ANPENDING *p = pendings + i;	511	ANPENDING *p = pendings + --pendingcnt;
397		512
398	if (p->w)	513	if (p->w)
399	{	514	{
400	p->w->pending = 0;	515	p->w->pending = 0;
401	p->w->cb (p->w, p->events);	516	p->w->cb (p->w, p->events);
402	}	517	}
403	}	518	}
404
405	pendingcnt = 0;
406	}	519	}
407		520
408	static void	521	static void
409	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	522	timers_reify (void)
410	{	523	{
411	while (timercnt && timers [0]->at <= now)	524	while (timercnt && timers [0]->at <= now)
412	{	525	{
413	struct ev_timer *w = timers [0];	526	struct ev_timer *w = timers [0];
		527
		528	event ((W)w, EV_TIMEOUT);
414		529
415	/* first reschedule or stop timer */	530	/* first reschedule or stop timer */
416	if (w->repeat)	531	if (w->repeat)
417	{	532	{
418	if (w->is_abs)
419	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
420	else
421	w->at = now + w->repeat;	533	w->at = now + w->repeat;
422		534	assert (("timer timeout in the past, negative repeat?", w->at > now));
423	assert (w->at > now);
424
425	downheap (timers, timercnt, 0);	535	downheap ((WT *)timers, timercnt, 0);
426	}	536	}
427	else	537	else
428	{
429	evtimer_stop (w); /* nonrepeating: stop timer */	538	evtimer_stop (w); /* nonrepeating: stop timer */
430	--timercnt; /* maybe pass by reference instead? */	539	}
		540	}
		541
		542	static void
		543	periodics_reify (void)
		544	{
		545	while (periodiccnt && periodics [0]->at <= ev_now)
		546	{
		547	struct ev_periodic *w = periodics [0];
		548
		549	/* first reschedule or stop timer */
		550	if (w->interval)
431	}	551	{
		552	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		553	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));
		554	downheap ((WT *)periodics, periodiccnt, 0);
		555	}
		556	else
		557	evperiodic_stop (w); /* nonrepeating: stop timer */
432		558
433	event ((W)w, EV_TIMEOUT);	559	event ((W)w, EV_TIMEOUT);
434	}	560	}
435	}	561	}
436		562
437	static void	563	static void
438	time_update ()	564	periodics_reschedule (ev_tstamp diff)
439	{	565	{
440	int i;	566	int i;
		567
		568	/* adjust periodics after time jump */
		569	for (i = 0; i < periodiccnt; ++i)
		570	{
		571	struct ev_periodic *w = periodics [i];
		572
		573	if (w->interval)
		574	{
		575	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		576
		577	if (fabs (diff) >= 1e-4)
		578	{
		579	evperiodic_stop (w);
		580	evperiodic_start (w);
		581
		582	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		583	}
		584	}
		585	}
		586	}
		587
		588	static void
		589	time_update (void)
		590	{
		591	int i;
		592
441	ev_now = ev_time ();	593	ev_now = ev_time ();
442		594
443	if (have_monotonic)	595	if (have_monotonic)
444	{	596	{
445	ev_tstamp odiff = diff;	597	ev_tstamp odiff = diff;
446		598
447	/* detecting time jumps is much more difficult */
448	for (i = 2; --i; ) /* loop a few times, before making important decisions */	599	for (i = 4; --i; ) /* loop a few times, before making important decisions */
449	{	600	{
450	now = get_clock ();	601	now = get_clock ();
451	diff = ev_now - now;	602	diff = ev_now - now;
452		603
453	if (fabs (odiff - diff) < MIN_TIMEJUMP)	604	if (fabs (odiff - diff) < MIN_TIMEJUMP)
454	return; /* all is well */	605	return; /* all is well */
455		606
456	ev_now = ev_time ();	607	ev_now = ev_time ();
457	}	608	}
458		609
459	/* time jump detected, reschedule atimers */	610	periodics_reschedule (diff - odiff);
460	for (i = 0; i < atimercnt; ++i)	611	/* no timer adjustment, as the monotonic clock doesn't jump */
461	{
462	struct ev_timer *w = atimers [i];
463	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
464	}
465	}	612	}
466	else	613	else
467	{	614	{
468	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	615	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
469	/* time jump detected, adjust rtimers */	616	{
		617	periodics_reschedule (ev_now - now);
		618
		619	/* adjust timers. this is easy, as the offset is the same for all */
470	for (i = 0; i < rtimercnt; ++i)	620	for (i = 0; i < timercnt; ++i)
471	rtimers [i]->at += ev_now - now;	621	timers [i]->at += diff;
		622	}
472		623
473	now = ev_now;	624	now = ev_now;
474	}	625	}
475	}	626	}
476		627
477	int ev_loop_done;	628	int ev_loop_done;
478		629
479	void ev_loop (int flags)	630	void ev_loop (int flags)
480	{	631	{
481	double block;	632	double block;
482	ev_loop_done = flags & EVLOOP_ONESHOT;	633	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
483
484	if (checkcnt)
485	{
486	queue_events ((W *)checks, checkcnt, EV_CHECK);
487	call_pending ();
488	}
489		634
490	do	635	do
491	{	636	{
		637	/* queue check watchers (and execute them) */
		638	if (preparecnt)
		639	{
		640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		641	call_pending ();
		642	}
		643
492	/* update fd-related kernel structures */	644	/* update fd-related kernel structures */
493	fd_reify ();	645	fd_reify ();
494		646
495	/* calculate blocking time */	647	/* calculate blocking time */
		648
		649	/* we only need this for !monotonic clockor timers, but as we basically
		650	always have timers, we just calculate it always */
		651	ev_now = ev_time ();
		652
496	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	653	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
497	block = 0.;	654	block = 0.;
498	else	655	else
499	{	656	{
500	block = MAX_BLOCKTIME;	657	block = MAX_BLOCKTIME;
501		658
502	if (rtimercnt)	659	if (timercnt)
503	{	660	{
504	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	661	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
505	if (block > to) block = to;	662	if (block > to) block = to;
506	}	663	}
507		664
508	if (atimercnt)	665	if (periodiccnt)
509	{	666	{
510	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	667	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
511	if (block > to) block = to;	668	if (block > to) block = to;
512	}	669	}
513		670
514	if (block < 0.) block = 0.;	671	if (block < 0.) block = 0.;
515	}	672	}
…		…
518		675
519	/* update ev_now, do magic */	676	/* update ev_now, do magic */
520	time_update ();	677	time_update ();
521		678
522	/* queue pending timers and reschedule them */	679	/* queue pending timers and reschedule them */
523	/* absolute timers first */	680	timers_reify (); /* relative timers called last */
524	timers_reify (atimers, atimercnt, ev_now);	681	periodics_reify (); /* absolute timers called first */
525	/* relative timers second */
526	timers_reify (rtimers, rtimercnt, now);
527		682
528	/* queue idle watchers unless io or timers are pending */	683	/* queue idle watchers unless io or timers are pending */
529	if (!pendingcnt)	684	if (!pendingcnt)
530	queue_events ((W *)idles, idlecnt, EV_IDLE);	685	queue_events ((W *)idles, idlecnt, EV_IDLE);
531		686
532	/* queue check and possibly idle watchers */	687	/* queue check watchers, to be executed first */
		688	if (checkcnt)
533	queue_events ((W *)checks, checkcnt, EV_CHECK);	689	queue_events ((W *)checks, checkcnt, EV_CHECK);
534		690
535	call_pending ();	691	call_pending ();
536	}	692	}
537	while (!ev_loop_done);	693	while (!ev_loop_done);
		694
		695	if (ev_loop_done != 2)
		696	ev_loop_done = 0;
538	}	697	}
539		698
540	/*****************************************************************************/	699	/*****************************************************************************/
541		700
542	static void	701	static void
…		…
560	head = &(*head)->next;	719	head = &(*head)->next;
561	}	720	}
562	}	721	}
563		722
564	static void	723	static void
		724	ev_clear (W w)
		725	{
		726	if (w->pending)
		727	{
		728	pendings [w->pending - 1].w = 0;
		729	w->pending = 0;
		730	}
		731	}
		732
		733	static void
565	ev_start (W w, int active)	734	ev_start (W w, int active)
566	{	735	{
567	w->pending = 0;
568	w->active = active;	736	w->active = active;
569	}	737	}
570		738
571	static void	739	static void
572	ev_stop (W w)	740	ev_stop (W w)
573	{	741	{
574	if (w->pending)
575	pendings [w->pending - 1].w = 0;
576
577	w->active = 0;	742	w->active = 0;
578	/* nop */
579	}	743	}
580		744
581	/*****************************************************************************/	745	/*****************************************************************************/
582		746
583	void	747	void
…		…
590		754
591	ev_start ((W)w, 1);	755	ev_start ((W)w, 1);
592	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
593	wlist_add ((WL *)&anfds[fd].head, (WL)w);	757	wlist_add ((WL *)&anfds[fd].head, (WL)w);
594		758
595	++fdchangecnt;	759	fd_change (fd);
596	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
597	fdchanges [fdchangecnt - 1] = fd;
598	}	760	}
599		761
600	void	762	void
601	evio_stop (struct ev_io *w)	763	evio_stop (struct ev_io *w)
602	{	764	{
		765	ev_clear ((W)w);
603	if (!ev_is_active (w))	766	if (!ev_is_active (w))
604	return;	767	return;
605		768
606	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
607	ev_stop ((W)w);	770	ev_stop ((W)w);
608		771
609	++fdchangecnt;	772	fd_change (w->fd);
610	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
611	fdchanges [fdchangecnt - 1] = w->fd;
612	}	773	}
613		774
614	void	775	void
615	evtimer_start (struct ev_timer *w)	776	evtimer_start (struct ev_timer *w)
616	{	777	{
617	if (ev_is_active (w))	778	if (ev_is_active (w))
618	return;	779	return;
619		780
620	if (w->is_abs)	781	w->at += now;
		782
		783	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
		784
		785	ev_start ((W)w, ++timercnt);
		786	array_needsize (timers, timermax, timercnt, );
		787	timers [timercnt - 1] = w;
		788	upheap ((WT *)timers, timercnt - 1);
		789	}
		790
		791	void
		792	evtimer_stop (struct ev_timer *w)
		793	{
		794	ev_clear ((W)w);
		795	if (!ev_is_active (w))
		796	return;
		797
		798	if (w->active < timercnt--)
		799	{
		800	timers [w->active - 1] = timers [timercnt];
		801	downheap ((WT *)timers, timercnt, w->active - 1);
621	{	802	}
622	/* this formula differs from the one in timer_reify becuse we do not round up */	803
		804	w->at = w->repeat;
		805
		806	ev_stop ((W)w);
		807	}
		808
		809	void
		810	evtimer_again (struct ev_timer *w)
		811	{
		812	if (ev_is_active (w))
		813	{
623	if (w->repeat)	814	if (w->repeat)
		815	{
		816	w->at = now + w->repeat;
		817	downheap ((WT *)timers, timercnt, w->active - 1);
		818	}
		819	else
		820	evtimer_stop (w);
		821	}
		822	else if (w->repeat)
		823	evtimer_start (w);
		824	}
		825
		826	void
		827	evperiodic_start (struct ev_periodic *w)
		828	{
		829	if (ev_is_active (w))
		830	return;
		831
		832	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
		833
		834	/* this formula differs from the one in periodic_reify because we do not always round up */
		835	if (w->interval)
624	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	836	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
625		837
626	ev_start ((W)w, ++atimercnt);	838	ev_start ((W)w, ++periodiccnt);
627	array_needsize (atimers, atimermax, atimercnt, );	839	array_needsize (periodics, periodicmax, periodiccnt, );
628	atimers [atimercnt - 1] = w;	840	periodics [periodiccnt - 1] = w;
629	upheap (atimers, atimercnt - 1);	841	upheap ((WT *)periodics, periodiccnt - 1);
630	}
631	else
632	{
633	w->at += now;
634
635	ev_start ((W)w, ++rtimercnt);
636	array_needsize (rtimers, rtimermax, rtimercnt, );
637	rtimers [rtimercnt - 1] = w;
638	upheap (rtimers, rtimercnt - 1);
639	}
640
641	}	842	}
642		843
643	void	844	void
644	evtimer_stop (struct ev_timer *w)	845	evperiodic_stop (struct ev_periodic *w)
645	{	846	{
		847	ev_clear ((W)w);
646	if (!ev_is_active (w))	848	if (!ev_is_active (w))
647	return;	849	return;
648		850
649	if (w->is_abs)
650	{
651	if (w->active < atimercnt--)	851	if (w->active < periodiccnt--)
652	{
653	atimers [w->active - 1] = atimers [atimercnt];
654	downheap (atimers, atimercnt, w->active - 1);
655	}
656	}	852	{
657	else	853	periodics [w->active - 1] = periodics [periodiccnt];
658	{	854	downheap ((WT *)periodics, periodiccnt, w->active - 1);
659	if (w->active < rtimercnt--)
660	{
661	rtimers [w->active - 1] = rtimers [rtimercnt];
662	downheap (rtimers, rtimercnt, w->active - 1);
663	}
664	}	855	}
665		856
666	ev_stop ((W)w);	857	ev_stop ((W)w);
667	}	858	}
668		859
…		…
687	}	878	}
688		879
689	void	880	void
690	evsignal_stop (struct ev_signal *w)	881	evsignal_stop (struct ev_signal *w)
691	{	882	{
		883	ev_clear ((W)w);
692	if (!ev_is_active (w))	884	if (!ev_is_active (w))
693	return;	885	return;
694		886
695	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
696	ev_stop ((W)w);	888	ev_stop ((W)w);
…		…
709	idles [idlecnt - 1] = w;	901	idles [idlecnt - 1] = w;
710	}	902	}
711		903
712	void evidle_stop (struct ev_idle *w)	904	void evidle_stop (struct ev_idle *w)
713	{	905	{
		906	ev_clear ((W)w);
		907	if (ev_is_active (w))
		908	return;
		909
714	idles [w->active - 1] = idles [--idlecnt];	910	idles [w->active - 1] = idles [--idlecnt];
		911	ev_stop ((W)w);
		912	}
		913
		914	void evprepare_start (struct ev_prepare *w)
		915	{
		916	if (ev_is_active (w))
		917	return;
		918
		919	ev_start ((W)w, ++preparecnt);
		920	array_needsize (prepares, preparemax, preparecnt, );
		921	prepares [preparecnt - 1] = w;
		922	}
		923
		924	void evprepare_stop (struct ev_prepare *w)
		925	{
		926	ev_clear ((W)w);
		927	if (ev_is_active (w))
		928	return;
		929
		930	prepares [w->active - 1] = prepares [--preparecnt];
715	ev_stop ((W)w);	931	ev_stop ((W)w);
716	}	932	}
717		933
718	void evcheck_start (struct ev_check *w)	934	void evcheck_start (struct ev_check *w)
719	{	935	{
…		…
725	checks [checkcnt - 1] = w;	941	checks [checkcnt - 1] = w;
726	}	942	}
727		943
728	void evcheck_stop (struct ev_check *w)	944	void evcheck_stop (struct ev_check *w)
729	{	945	{
		946	ev_clear ((W)w);
		947	if (ev_is_active (w))
		948	return;
		949
730	checks [w->active - 1] = checks [--checkcnt];	950	checks [w->active - 1] = checks [--checkcnt];
731	ev_stop ((W)w);	951	ev_stop ((W)w);
732	}	952	}
733		953
		954	void evchild_start (struct ev_child *w)
		955	{
		956	if (ev_is_active (w))
		957	return;
		958
		959	ev_start ((W)w, 1);
		960	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		961	}
		962
		963	void evchild_stop (struct ev_child *w)
		964	{
		965	ev_clear ((W)w);
		966	if (ev_is_active (w))
		967	return;
		968
		969	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		970	ev_stop ((W)w);
		971	}
		972
		973	/*****************************************************************************/
		974
		975	struct ev_once
		976	{
		977	struct ev_io io;
		978	struct ev_timer to;
		979	void (cb)(int revents, void arg);
		980	void *arg;
		981	};
		982
		983	static void
		984	once_cb (struct ev_once *once, int revents)
		985	{
		986	void (cb)(int revents, void arg) = once->cb;
		987	void *arg = once->arg;
		988
		989	evio_stop (&once->io);
		990	evtimer_stop (&once->to);
		991	free (once);
		992
		993	cb (revents, arg);
		994	}
		995
		996	static void
		997	once_cb_io (struct ev_io *w, int revents)
		998	{
		999	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1000	}
		1001
		1002	static void
		1003	once_cb_to (struct ev_timer *w, int revents)
		1004	{
		1005	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1006	}
		1007
		1008	void
		1009	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1010	{
		1011	struct ev_once *once = malloc (sizeof (struct ev_once));
		1012
		1013	if (!once)
		1014	cb (EV_ERROR, arg);
		1015	else
		1016	{
		1017	once->cb = cb;
		1018	once->arg = arg;
		1019
		1020	evw_init (&once->io, once_cb_io);
		1021
		1022	if (fd >= 0)
		1023	{
		1024	evio_set (&once->io, fd, events);
		1025	evio_start (&once->io);
		1026	}
		1027
		1028	evw_init (&once->to, once_cb_to);
		1029
		1030	if (timeout >= 0.)
		1031	{
		1032	evtimer_set (&once->to, timeout, 0.);
		1033	evtimer_start (&once->to);
		1034	}
		1035	}
		1036	}
		1037
734	/*****************************************************************************/	1038	/*****************************************************************************/
735		1039
736	#if 0	1040	#if 0
		1041
		1042	struct ev_io wio;
737		1043
738	static void	1044	static void
739	sin_cb (struct ev_io *w, int revents)	1045	sin_cb (struct ev_io *w, int revents)
740	{	1046	{
741	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1047	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
751		1057
752	static void	1058	static void
753	scb (struct ev_signal *w, int revents)	1059	scb (struct ev_signal *w, int revents)
754	{	1060	{
755	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1061	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1062	evio_stop (&wio);
		1063	evio_start (&wio);
756	}	1064	}
757		1065
758	static void	1066	static void
759	gcb (struct ev_signal *w, int revents)	1067	gcb (struct ev_signal *w, int revents)
760	{	1068	{
761	fprintf (stderr, "generic %x\n", revents);	1069	fprintf (stderr, "generic %x\n", revents);
		1070
762	}	1071	}
763		1072
764	int main (void)	1073	int main (void)
765	{	1074	{
766	struct ev_io sin;
767
768	ev_init (0);	1075	ev_init (0);
769		1076
770	evw_init (&sin, sin_cb, 55);
771	evio_set (&sin, 0, EV_READ);	1077	evio_init (&wio, sin_cb, 0, EV_READ);
772	evio_start (&sin);	1078	evio_start (&wio);
773		1079
774	struct ev_timer t[10000];	1080	struct ev_timer t[10000];
775		1081
776	#if 0	1082	#if 0
777	int i;	1083	int i;
778	for (i = 0; i < 10000; ++i)	1084	for (i = 0; i < 10000; ++i)
779	{	1085	{
780	struct ev_timer *w = t + i;	1086	struct ev_timer *w = t + i;
781	evw_init (w, ocb, i);	1087	evw_init (w, ocb, i);
782	evtimer_set_abs (w, drand48 (), 0.99775533);	1088	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
783	evtimer_start (w);	1089	evtimer_start (w);
784	if (drand48 () < 0.5)	1090	if (drand48 () < 0.5)
785	evtimer_stop (w);	1091	evtimer_stop (w);
786	}	1092	}
787	#endif	1093	#endif
788		1094
789	struct ev_timer t1;	1095	struct ev_timer t1;
790	evw_init (&t1, ocb, 0);	1096	evtimer_init (&t1, ocb, 5, 10);
791	evtimer_set_abs (&t1, 5, 10);
792	evtimer_start (&t1);	1097	evtimer_start (&t1);
793		1098
794	struct ev_signal sig;	1099	struct ev_signal sig;
795	evw_init (&sig, scb, 65535);
796	evsignal_set (&sig, SIGQUIT);	1100	evsignal_init (&sig, scb, SIGQUIT);
797	evsignal_start (&sig);	1101	evsignal_start (&sig);
798		1102
799	struct ev_check cw;	1103	struct ev_check cw;
800	evw_init (&cw, gcb, 0);	1104	evcheck_init (&cw, gcb);
801	evcheck_start (&cw);	1105	evcheck_start (&cw);
802		1106
803	struct ev_idle iw;	1107	struct ev_idle iw;
804	evw_init (&iw, gcb, 0);	1108	evidle_init (&iw, gcb);
805	evidle_start (&iw);	1109	evidle_start (&iw);
806		1110
807	ev_loop (0);	1111	ev_loop (0);
808		1112
809	return 0;	1113	return 0;

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Comparing libev/ev.c (file contents): Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs. Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs.
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC