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

Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.22 by root, Wed Oct 31 19:07:43 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
39	static int have_monotonic; /* runtime */	78	static int have_monotonic; /* runtime */
40		79
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
42	static void (*method_modify)(int fd, int oev, int nev);	81	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);	82	static void (*method_poll)(ev_tstamp timeout);
		83
		84	/*****************************************************************************/
44		85
45	ev_tstamp	86	ev_tstamp
46	ev_time (void)	87	ev_time (void)
47	{	88	{
48	#if HAVE_REALTIME	89	#if HAVE_REALTIME
73		114
74	#define array_needsize(base,cur,cnt,init) \	115	#define array_needsize(base,cur,cnt,init) \
75	if ((cnt) > cur) \	116	if ((cnt) > cur) \
76	{ \	117	{ \
77	int newcnt = cur ? cur << 1 : 16; \	118	int newcnt = cur ? cur << 1 : 16; \
78	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\
79	base = realloc (base, sizeof (base) (newcnt)); \	119	base = realloc (base, sizeof (base) (newcnt)); \
80	init (base + cur, newcnt - cur); \	120	init (base + cur, newcnt - cur); \
81	cur = newcnt; \	121	cur = newcnt; \
82	}	122	}
83		123
		124	/*****************************************************************************/
		125
84	typedef struct	126	typedef struct
85	{	127	{
86	struct ev_io *head;	128	struct ev_io *head;
87	unsigned char wev, rev; /* want, received event set */	129	unsigned char wev, rev; /* want, received event set */
88	} ANFD;	130	} ANFD;
…		…
104	}	146	}
105	}	147	}
106		148
107	typedef struct	149	typedef struct
108	{	150	{
109	struct ev_watcher *w;	151	W w;
110	int events;	152	int events;
111	} ANPENDING;	153	} ANPENDING;
112		154
113	static ANPENDING *pendings;	155	static ANPENDING *pendings;
114	static int pendingmax, pendingcnt;	156	static int pendingmax, pendingcnt;
115		157
116	static void	158	static void
117	event (struct ev_watcher *w, int events)	159	event (W w, int events)
118	{	160	{
		161	if (w->active)
		162	{
119	w->pending = ++pendingcnt;	163	w->pending = ++pendingcnt;
120	array_needsize (pendings, pendingmax, pendingcnt, );	164	array_needsize (pendings, pendingmax, pendingcnt, );
121	pendings [pendingcnt - 1].w = w;	165	pendings [pendingcnt - 1].w = w;
122	pendings [pendingcnt - 1].events = events;	166	pendings [pendingcnt - 1].events = events;
		167	}
123	}	168	}
124		169
125	static void	170	static void
126	fd_event (int fd, int events)	171	fd_event (int fd, int events)
127	{	172	{
…		…
131	for (w = anfd->head; w; w = w->next)	176	for (w = anfd->head; w; w = w->next)
132	{	177	{
133	int ev = w->events & events;	178	int ev = w->events & events;
134		179
135	if (ev)	180	if (ev)
136	event ((struct ev_watcher *)w, ev);	181	event ((W)w, ev);
137	}	182	}
138	}	183	}
139		184
		185	static void
		186	queue_events (W *events, int eventcnt, int type)
		187	{
		188	int i;
		189
		190	for (i = 0; i < eventcnt; ++i)
		191	event (events [i], type);
		192	}
		193
		194	/* called on EBADF to verify fds */
		195	static void
		196	fd_recheck ()
		197	{
		198	int fd;
		199
		200	for (fd = 0; fd < anfdmax; ++fd)
		201	if (anfds [fd].wev)
		202	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		203	while (anfds [fd].head)
		204	evio_stop (anfds [fd].head);
		205	}
		206
		207	/*****************************************************************************/
		208
140	static struct ev_timer **atimers;	209	static struct ev_timer **timers;
141	static int atimermax, atimercnt;	210	static int timermax, timercnt;
142		211
143	static struct ev_timer **rtimers;	212	static struct ev_periodic **periodics;
144	static int rtimermax, rtimercnt;	213	static int periodicmax, periodiccnt;
145		214
146	static void	215	static void
147	upheap (struct ev_timer **timers, int k)	216	upheap (WT *timers, int k)
148	{	217	{
149	struct ev_timer *w = timers [k];	218	WT w = timers [k];
150		219
151	while (k && timers [k >> 1]->at > w->at)	220	while (k && timers [k >> 1]->at > w->at)
152	{	221	{
153	timers [k] = timers [k >> 1];	222	timers [k] = timers [k >> 1];
154	timers [k]->active = k + 1;	223	timers [k]->active = k + 1;
…		…
159	timers [k]->active = k + 1;	228	timers [k]->active = k + 1;
160		229
161	}	230	}
162		231
163	static void	232	static void
164	downheap (struct ev_timer **timers, int N, int k)	233	downheap (WT *timers, int N, int k)
165	{	234	{
166	struct ev_timer *w = timers [k];	235	WT w = timers [k];
167		236
168	while (k < (N >> 1))	237	while (k < (N >> 1))
169	{	238	{
170	int j = k << 1;	239	int j = k << 1;
171		240
…		…
181	}	250	}
182		251
183	timers [k] = w;	252	timers [k] = w;
184	timers [k]->active = k + 1;	253	timers [k]->active = k + 1;
185	}	254	}
		255
		256	/*****************************************************************************/
186		257
187	typedef struct	258	typedef struct
188	{	259	{
189	struct ev_signal *head;	260	struct ev_signal *head;
190	sig_atomic_t gotsig;	261	sig_atomic_t gotsig;
…		…
233	if (signals [sig].gotsig)	304	if (signals [sig].gotsig)
234	{	305	{
235	signals [sig].gotsig = 0;	306	signals [sig].gotsig = 0;
236		307
237	for (w = signals [sig].head; w; w = w->next)	308	for (w = signals [sig].head; w; w = w->next)
238	event ((struct ev_watcher *)w, EV_SIGNAL);	309	event ((W)w, EV_SIGNAL);
239	}	310	}
240	}	311	}
241		312
242	static void	313	static void
243	siginit (void)	314	siginit (void)
…		…
250	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	321	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
251		322
252	evio_set (&sigev, sigpipe [0], EV_READ);	323	evio_set (&sigev, sigpipe [0], EV_READ);
253	evio_start (&sigev);	324	evio_start (&sigev);
254	}	325	}
		326
		327	/*****************************************************************************/
		328
		329	static struct ev_idle **idles;
		330	static int idlemax, idlecnt;
		331
		332	static struct ev_prepare **prepares;
		333	static int preparemax, preparecnt;
		334
		335	static struct ev_check **checks;
		336	static int checkmax, checkcnt;
		337
		338	/*****************************************************************************/
		339
		340	static struct ev_child *childs [PID_HASHSIZE];
		341	static struct ev_signal childev;
		342
		343	#ifndef WCONTINUED
		344	# define WCONTINUED 0
		345	#endif
		346
		347	static void
		348	childcb (struct ev_signal *sw, int revents)
		349	{
		350	struct ev_child *w;
		351	int pid, status;
		352
		353	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)
		354	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
		355	if (w->pid == pid \|\| w->pid == -1)
		356	{
		357	w->status = status;
		358	event ((W)w, EV_CHILD);
		359	}
		360	}
		361
		362	/*****************************************************************************/
255		363
256	#if HAVE_EPOLL	364	#if HAVE_EPOLL
257	# include "ev_epoll.c"	365	# include "ev_epoll.c"
258	#endif	366	#endif
259	#if HAVE_SELECT	367	#if HAVE_SELECT
…		…
285	if (ev_method == EVMETHOD_NONE) select_init (flags);	393	if (ev_method == EVMETHOD_NONE) select_init (flags);
286	#endif	394	#endif
287		395
288	if (ev_method)	396	if (ev_method)
289	{	397	{
290	evw_init (&sigev, sigcb, 0);	398	evw_init (&sigev, sigcb);
291	siginit ();	399	siginit ();
		400
		401	evsignal_init (&childev, childcb, SIGCHLD);
		402	evsignal_start (&childev);
292	}	403	}
293		404
294	return ev_method;	405	return ev_method;
295	}	406	}
296		407
		408	/*****************************************************************************/
		409
297	void ev_prefork (void)	410	void ev_prefork (void)
298	{	411	{
		412	/* nop */
299	}	413	}
300		414
301	void ev_postfork_parent (void)	415	void ev_postfork_parent (void)
302	{	416	{
		417	/* nop */
303	}	418	}
304		419
305	void ev_postfork_child (void)	420	void ev_postfork_child (void)
306	{	421	{
307	#if HAVE_EPOLL	422	#if HAVE_EPOLL
…		…
314	close (sigpipe [1]);	429	close (sigpipe [1]);
315	pipe (sigpipe);	430	pipe (sigpipe);
316	siginit ();	431	siginit ();
317	}	432	}
318		433
		434	/*****************************************************************************/
		435
319	static void	436	static void
320	fd_reify (void)	437	fd_reify (void)
321	{	438	{
322	int i;	439	int i;
323		440
…		…
343	}	460	}
344		461
345	static void	462	static void
346	call_pending ()	463	call_pending ()
347	{	464	{
348	int i;	465	while (pendingcnt)
349
350	for (i = 0; i < pendingcnt; ++i)
351	{	466	{
352	ANPENDING *p = pendings + i;	467	ANPENDING *p = pendings + --pendingcnt;
353		468
354	if (p->w)	469	if (p->w)
355	{	470	{
356	p->w->pending = 0;	471	p->w->pending = 0;
357	p->w->cb (p->w, p->events);	472	p->w->cb (p->w, p->events);
358	}	473	}
359	}	474	}
360
361	pendingcnt = 0;
362	}	475	}
363		476
364	static void	477	static void
365	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	478	timers_reify ()
366	{	479	{
367	while (timercnt && timers [0]->at <= now)	480	while (timercnt && timers [0]->at <= now)
368	{	481	{
369	struct ev_timer *w = timers [0];	482	struct ev_timer *w = timers [0];
		483
		484	event ((W)w, EV_TIMEOUT);
370		485
371	/* first reschedule or stop timer */	486	/* first reschedule or stop timer */
372	if (w->repeat)	487	if (w->repeat)
373	{	488	{
374	if (w->is_abs)
375	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
376	else
377	w->at = now + w->repeat;	489	w->at = now + w->repeat;
378		490	assert (("timer timeout in the past, negative repeat?", w->at > now));
379	assert (w->at > now);
380
381	downheap (timers, timercnt, 0);	491	downheap ((WT *)timers, timercnt, 0);
382	}	492	}
383	else	493	else
384	{
385	evtimer_stop (w); /* nonrepeating: stop timer */	494	evtimer_stop (w); /* nonrepeating: stop timer */
386	--timercnt; /* maybe pass by reference instead? */	495	}
		496	}
		497
		498	static void
		499	periodics_reify ()
		500	{
		501	while (periodiccnt && periodics [0]->at <= ev_now)
		502	{
		503	struct ev_periodic *w = periodics [0];
		504
		505	/* first reschedule or stop timer */
		506	if (w->interval)
387	}	507	{
		508	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		509	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));
		510	downheap ((WT *)periodics, periodiccnt, 0);
		511	}
		512	else
		513	evperiodic_stop (w); /* nonrepeating: stop timer */
388		514
389	event ((struct ev_watcher *)w, EV_TIMEOUT);	515	event ((W)w, EV_TIMEOUT);
		516	}
		517	}
		518
		519	static void
		520	periodics_reschedule (ev_tstamp diff)
		521	{
		522	int i;
		523
		524	/* adjust periodics after time jump */
		525	for (i = 0; i < periodiccnt; ++i)
		526	{
		527	struct ev_periodic *w = periodics [i];
		528
		529	if (w->interval)
		530	{
		531	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		532
		533	if (fabs (diff) >= 1e-4)
		534	{
		535	evperiodic_stop (w);
		536	evperiodic_start (w);
		537
		538	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		539	}
		540	}
390	}	541	}
391	}	542	}
392		543
393	static void	544	static void
394	time_update ()	545	time_update ()
395	{	546	{
396	int i;	547	int i;
		548
397	ev_now = ev_time ();	549	ev_now = ev_time ();
398		550
399	if (have_monotonic)	551	if (have_monotonic)
400	{	552	{
401	ev_tstamp odiff = diff;	553	ev_tstamp odiff = diff;
402		554
403	/* detecting time jumps is much more difficult */
404	for (i = 2; --i; ) /* loop a few times, before making important decisions */	555	for (i = 4; --i; ) /* loop a few times, before making important decisions */
405	{	556	{
406	now = get_clock ();	557	now = get_clock ();
407	diff = ev_now - now;	558	diff = ev_now - now;
408		559
409	if (fabs (odiff - diff) < MIN_TIMEJUMP)	560	if (fabs (odiff - diff) < MIN_TIMEJUMP)
410	return; /* all is well */	561	return; /* all is well */
411		562
412	ev_now = ev_time ();	563	ev_now = ev_time ();
413	}	564	}
414		565
415	/* time jump detected, reschedule atimers */	566	periodics_reschedule (diff - odiff);
416	for (i = 0; i < atimercnt; ++i)	567	/* no timer adjustment, as the monotonic clock doesn't jump */
417	{
418	struct ev_timer *w = atimers [i];
419	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
420	}
421	}	568	}
422	else	569	else
423	{	570	{
424	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	571	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
425	/* time jump detected, adjust rtimers */	572	{
		573	periodics_reschedule (ev_now - now);
		574
		575	/* adjust timers. this is easy, as the offset is the same for all */
426	for (i = 0; i < rtimercnt; ++i)	576	for (i = 0; i < timercnt; ++i)
427	rtimers [i]->at += ev_now - now;	577	timers [i]->at += diff;
		578	}
428		579
429	now = ev_now;	580	now = ev_now;
430	}	581	}
431	}	582	}
432		583
433	int ev_loop_done;	584	int ev_loop_done;
434		585
435	void ev_loop (int flags)	586	void ev_loop (int flags)
436	{	587	{
437	double block;	588	double block;
438	ev_loop_done = flags & EVLOOP_ONESHOT;	589	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
439		590
440	do	591	do
441	{	592	{
		593	/* queue check watchers (and execute them) */
		594	if (preparecnt)
		595	{
		596	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		597	call_pending ();
		598	}
		599
442	/* update fd-related kernel structures */	600	/* update fd-related kernel structures */
443	fd_reify ();	601	fd_reify ();
444		602
445	/* calculate blocking time */	603	/* calculate blocking time */
		604
		605	/* we only need this for !monotonic clockor timers, but as we basically
		606	always have timers, we just calculate it always */
		607	ev_now = ev_time ();
		608
446	if (flags & EVLOOP_NONBLOCK)	609	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
447	block = 0.;	610	block = 0.;
448	else	611	else
449	{	612	{
450	block = MAX_BLOCKTIME;	613	block = MAX_BLOCKTIME;
451		614
452	if (rtimercnt)	615	if (timercnt)
453	{	616	{
454	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	617	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
455	if (block > to) block = to;	618	if (block > to) block = to;
456	}	619	}
457		620
458	if (atimercnt)	621	if (periodiccnt)
459	{	622	{
460	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	623	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
461	if (block > to) block = to;	624	if (block > to) block = to;
462	}	625	}
463		626
464	if (block < 0.) block = 0.;	627	if (block < 0.) block = 0.;
465	}	628	}
…		…
467	method_poll (block);	630	method_poll (block);
468		631
469	/* update ev_now, do magic */	632	/* update ev_now, do magic */
470	time_update ();	633	time_update ();
471		634
472	/* put pending timers into pendign queue and reschedule them */	635	/* queue pending timers and reschedule them */
473	/* absolute timers first */	636	timers_reify (); /* relative timers called last */
474	timers_reify (atimers, atimercnt, ev_now);	637	periodics_reify (); /* absolute timers called first */
475	/* relative timers second */	638
476	timers_reify (rtimers, rtimercnt, now);	639	/* queue idle watchers unless io or timers are pending */
		640	if (!pendingcnt)
		641	queue_events ((W *)idles, idlecnt, EV_IDLE);
		642
		643	/* queue check watchers, to be executed first */
		644	if (checkcnt)
		645	queue_events ((W *)checks, checkcnt, EV_CHECK);
477		646
478	call_pending ();	647	call_pending ();
479	}	648	}
480	while (!ev_loop_done);	649	while (!ev_loop_done);
481	}
482		650
		651	if (ev_loop_done != 2)
		652	ev_loop_done = 0;
		653	}
		654
		655	/*****************************************************************************/
		656
483	static void	657	static void
484	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	658	wlist_add (WL *head, WL elem)
485	{	659	{
486	elem->next = *head;	660	elem->next = *head;
487	*head = elem;	661	*head = elem;
488	}	662	}
489		663
490	static void	664	static void
491	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	665	wlist_del (WL *head, WL elem)
492	{	666	{
493	while (*head)	667	while (*head)
494	{	668	{
495	if (*head == elem)	669	if (*head == elem)
496	{	670	{
…		…
501	head = &(*head)->next;	675	head = &(*head)->next;
502	}	676	}
503	}	677	}
504		678
505	static void	679	static void
506	ev_start (struct ev_watcher *w, int active)	680	ev_clear (W w)
507	{	681	{
		682	if (w->pending)
		683	{
		684	pendings [w->pending - 1].w = 0;
508	w->pending = 0;	685	w->pending = 0;
		686	}
		687	}
		688
		689	static void
		690	ev_start (W w, int active)
		691	{
509	w->active = active;	692	w->active = active;
510	}	693	}
511		694
512	static void	695	static void
513	ev_stop (struct ev_watcher *w)	696	ev_stop (W w)
514	{	697	{
515	if (w->pending)
516	pendings [w->pending - 1].w = 0;
517
518	w->active = 0;	698	w->active = 0;
519	/* nop */
520	}	699	}
		700
		701	/*****************************************************************************/
521		702
522	void	703	void
523	evio_start (struct ev_io *w)	704	evio_start (struct ev_io *w)
524	{	705	{
525	if (ev_is_active (w))	706	if (ev_is_active (w))
526	return;	707	return;
527		708
528	int fd = w->fd;	709	int fd = w->fd;
529		710
530	ev_start ((struct ev_watcher *)w, 1);	711	ev_start ((W)w, 1);
531	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	712	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
532	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	713	wlist_add ((WL *)&anfds[fd].head, (WL)w);
533		714
534	++fdchangecnt;	715	++fdchangecnt;
535	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	716	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536	fdchanges [fdchangecnt - 1] = fd;	717	fdchanges [fdchangecnt - 1] = fd;
537	}	718	}
538		719
539	void	720	void
540	evio_stop (struct ev_io *w)	721	evio_stop (struct ev_io *w)
541	{	722	{
		723	ev_clear ((W)w);
542	if (!ev_is_active (w))	724	if (!ev_is_active (w))
543	return;	725	return;
544		726
545	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	727	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
546	ev_stop ((struct ev_watcher *)w);	728	ev_stop ((W)w);
547		729
548	++fdchangecnt;	730	++fdchangecnt;
549	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	731	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550	fdchanges [fdchangecnt - 1] = w->fd;	732	fdchanges [fdchangecnt - 1] = w->fd;
551	}	733	}
…		…
554	evtimer_start (struct ev_timer *w)	736	evtimer_start (struct ev_timer *w)
555	{	737	{
556	if (ev_is_active (w))	738	if (ev_is_active (w))
557	return;	739	return;
558		740
559	if (w->is_abs)	741	w->at += now;
560	{
561	/* this formula differs from the one in timer_reify becuse we do not round up */
562	if (w->repeat)
563	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
564		742
565	ev_start ((struct ev_watcher *)w, ++atimercnt);	743	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
		744
		745	ev_start ((W)w, ++timercnt);
566	array_needsize (atimers, atimermax, atimercnt, );	746	array_needsize (timers, timermax, timercnt, );
567	atimers [atimercnt - 1] = w;	747	timers [timercnt - 1] = w;
568	upheap (atimers, atimercnt - 1);	748	upheap ((WT *)timers, timercnt - 1);
569	}
570	else
571	{
572	w->at += now;
573
574	ev_start ((struct ev_watcher *)w, ++rtimercnt);
575	array_needsize (rtimers, rtimermax, rtimercnt, );
576	rtimers [rtimercnt - 1] = w;
577	upheap (rtimers, rtimercnt - 1);
578	}
579
580	}	749	}
581		750
582	void	751	void
583	evtimer_stop (struct ev_timer *w)	752	evtimer_stop (struct ev_timer *w)
584	{	753	{
		754	ev_clear ((W)w);
585	if (!ev_is_active (w))	755	if (!ev_is_active (w))
586	return;	756	return;
587		757
588	if (w->is_abs)
589	{
590	if (w->active < atimercnt--)	758	if (w->active < timercnt--)
591	{	759	{
592	atimers [w->active - 1] = atimers [atimercnt];	760	timers [w->active - 1] = timers [timercnt];
		761	downheap ((WT *)timers, timercnt, w->active - 1);
		762	}
		763
		764	w->at = w->repeat;
		765
		766	ev_stop ((W)w);
		767	}
		768
		769	void
		770	evtimer_again (struct ev_timer *w)
		771	{
		772	if (ev_is_active (w))
		773	{
		774	if (w->repeat)
		775	{
		776	w->at = now + w->repeat;
593	downheap (atimers, atimercnt, w->active - 1);	777	downheap ((WT *)timers, timercnt, w->active - 1);
594	}
595	}
596	else
597	{
598	if (w->active < rtimercnt--)
599	{	778	}
600	rtimers [w->active - 1] = rtimers [rtimercnt];	779	else
601	downheap (rtimers, rtimercnt, w->active - 1);	780	evtimer_stop (w);
602	}	781	}
		782	else if (w->repeat)
		783	evtimer_start (w);
		784	}
		785
		786	void
		787	evperiodic_start (struct ev_periodic *w)
		788	{
		789	if (ev_is_active (w))
		790	return;
		791
		792	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
		793
		794	/* this formula differs from the one in periodic_reify because we do not always round up */
		795	if (w->interval)
		796	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
		797
		798	ev_start ((W)w, ++periodiccnt);
		799	array_needsize (periodics, periodicmax, periodiccnt, );
		800	periodics [periodiccnt - 1] = w;
		801	upheap ((WT *)periodics, periodiccnt - 1);
		802	}
		803
		804	void
		805	evperiodic_stop (struct ev_periodic *w)
		806	{
		807	ev_clear ((W)w);
		808	if (!ev_is_active (w))
		809	return;
		810
		811	if (w->active < periodiccnt--)
603	}	812	{
		813	periodics [w->active - 1] = periodics [periodiccnt];
		814	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		815	}
604		816
605	ev_stop ((struct ev_watcher *)w);	817	ev_stop ((W)w);
606	}	818	}
607		819
608	void	820	void
609	evsignal_start (struct ev_signal *w)	821	evsignal_start (struct ev_signal *w)
610	{	822	{
611	if (ev_is_active (w))	823	if (ev_is_active (w))
612	return;	824	return;
613		825
614	ev_start ((struct ev_watcher *)w, 1);	826	ev_start ((W)w, 1);
615	array_needsize (signals, signalmax, w->signum, signals_init);	827	array_needsize (signals, signalmax, w->signum, signals_init);
616	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	828	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
617		829
618	if (!w->next)	830	if (!w->next)
619	{	831	{
620	struct sigaction sa;	832	struct sigaction sa;
621	sa.sa_handler = sighandler;	833	sa.sa_handler = sighandler;
…		…
626	}	838	}
627		839
628	void	840	void
629	evsignal_stop (struct ev_signal *w)	841	evsignal_stop (struct ev_signal *w)
630	{	842	{
		843	ev_clear ((W)w);
631	if (!ev_is_active (w))	844	if (!ev_is_active (w))
632	return;	845	return;
633		846
634	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	847	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
635	ev_stop ((struct ev_watcher *)w);	848	ev_stop ((W)w);
636		849
637	if (!signals [w->signum - 1].head)	850	if (!signals [w->signum - 1].head)
638	signal (w->signum, SIG_DFL);	851	signal (w->signum, SIG_DFL);
639	}	852	}
640		853
		854	void evidle_start (struct ev_idle *w)
		855	{
		856	if (ev_is_active (w))
		857	return;
		858
		859	ev_start ((W)w, ++idlecnt);
		860	array_needsize (idles, idlemax, idlecnt, );
		861	idles [idlecnt - 1] = w;
		862	}
		863
		864	void evidle_stop (struct ev_idle *w)
		865	{
		866	ev_clear ((W)w);
		867	if (ev_is_active (w))
		868	return;
		869
		870	idles [w->active - 1] = idles [--idlecnt];
		871	ev_stop ((W)w);
		872	}
		873
		874	void evprepare_start (struct ev_prepare *w)
		875	{
		876	if (ev_is_active (w))
		877	return;
		878
		879	ev_start ((W)w, ++preparecnt);
		880	array_needsize (prepares, preparemax, preparecnt, );
		881	prepares [preparecnt - 1] = w;
		882	}
		883
		884	void evprepare_stop (struct ev_prepare *w)
		885	{
		886	ev_clear ((W)w);
		887	if (ev_is_active (w))
		888	return;
		889
		890	prepares [w->active - 1] = prepares [--preparecnt];
		891	ev_stop ((W)w);
		892	}
		893
		894	void evcheck_start (struct ev_check *w)
		895	{
		896	if (ev_is_active (w))
		897	return;
		898
		899	ev_start ((W)w, ++checkcnt);
		900	array_needsize (checks, checkmax, checkcnt, );
		901	checks [checkcnt - 1] = w;
		902	}
		903
		904	void evcheck_stop (struct ev_check *w)
		905	{
		906	ev_clear ((W)w);
		907	if (ev_is_active (w))
		908	return;
		909
		910	checks [w->active - 1] = checks [--checkcnt];
		911	ev_stop ((W)w);
		912	}
		913
		914	void evchild_start (struct ev_child *w)
		915	{
		916	if (ev_is_active (w))
		917	return;
		918
		919	ev_start ((W)w, 1);
		920	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		921	}
		922
		923	void evchild_stop (struct ev_child *w)
		924	{
		925	ev_clear ((W)w);
		926	if (ev_is_active (w))
		927	return;
		928
		929	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		930	ev_stop ((W)w);
		931	}
		932
641	/*****************************************************************************/	933	/*****************************************************************************/
		934
		935	struct ev_once
		936	{
		937	struct ev_io io;
		938	struct ev_timer to;
		939	void (cb)(int revents, void arg);
		940	void *arg;
		941	};
		942
		943	static void
		944	once_cb (struct ev_once *once, int revents)
		945	{
		946	void (cb)(int revents, void arg) = once->cb;
		947	void *arg = once->arg;
		948
		949	evio_stop (&once->io);
		950	evtimer_stop (&once->to);
		951	free (once);
		952
		953	cb (revents, arg);
		954	}
		955
		956	static void
		957	once_cb_io (struct ev_io *w, int revents)
		958	{
		959	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		960	}
		961
		962	static void
		963	once_cb_to (struct ev_timer *w, int revents)
		964	{
		965	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		966	}
		967
		968	void
		969	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		970	{
		971	struct ev_once *once = malloc (sizeof (struct ev_once));
		972
		973	if (!once)
		974	cb (EV_ERROR, arg);
		975	else
		976	{
		977	once->cb = cb;
		978	once->arg = arg;
		979
		980	evw_init (&once->io, once_cb_io);
		981
		982	if (fd >= 0)
		983	{
		984	evio_set (&once->io, fd, events);
		985	evio_start (&once->io);
		986	}
		987
		988	evw_init (&once->to, once_cb_to);
		989
		990	if (timeout >= 0.)
		991	{
		992	evtimer_set (&once->to, timeout, 0.);
		993	evtimer_start (&once->to);
		994	}
		995	}
		996	}
		997
		998	/*****************************************************************************/
		999
642	#if 1	1000	#if 0
		1001
		1002	struct ev_io wio;
643		1003
644	static void	1004	static void
645	sin_cb (struct ev_io *w, int revents)	1005	sin_cb (struct ev_io *w, int revents)
646	{	1006	{
647	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1007	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
657		1017
658	static void	1018	static void
659	scb (struct ev_signal *w, int revents)	1019	scb (struct ev_signal *w, int revents)
660	{	1020	{
661	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1021	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1022	evio_stop (&wio);
		1023	evio_start (&wio);
		1024	}
		1025
		1026	static void
		1027	gcb (struct ev_signal *w, int revents)
		1028	{
		1029	fprintf (stderr, "generic %x\n", revents);
		1030
662	}	1031	}
663		1032
664	int main (void)	1033	int main (void)
665	{	1034	{
666	struct ev_io sin;
667
668	ev_init (0);	1035	ev_init (0);
669		1036
670	evw_init (&sin, sin_cb, 55);
671	evio_set (&sin, 0, EV_READ);	1037	evio_init (&wio, sin_cb, 0, EV_READ);
672	evio_start (&sin);	1038	evio_start (&wio);
673		1039
674	struct ev_timer t[10000];	1040	struct ev_timer t[10000];
675		1041
676	#if 0	1042	#if 0
677	int i;	1043	int i;
678	for (i = 0; i < 10000; ++i)	1044	for (i = 0; i < 10000; ++i)
679	{	1045	{
680	struct ev_timer *w = t + i;	1046	struct ev_timer *w = t + i;
681	evw_init (w, ocb, i);	1047	evw_init (w, ocb, i);
682	evtimer_set_abs (w, drand48 (), 0.99775533);	1048	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
683	evtimer_start (w);	1049	evtimer_start (w);
684	if (drand48 () < 0.5)	1050	if (drand48 () < 0.5)
685	evtimer_stop (w);	1051	evtimer_stop (w);
686	}	1052	}
687	#endif	1053	#endif
688		1054
689	struct ev_timer t1;	1055	struct ev_timer t1;
690	evw_init (&t1, ocb, 0);	1056	evtimer_init (&t1, ocb, 5, 10);
691	evtimer_set_abs (&t1, 5, 10);
692	evtimer_start (&t1);	1057	evtimer_start (&t1);
693		1058
694	struct ev_signal sig;	1059	struct ev_signal sig;
695	evw_init (&sig, scb, 65535);
696	evsignal_set (&sig, SIGQUIT);	1060	evsignal_init (&sig, scb, SIGQUIT);
697	evsignal_start (&sig);	1061	evsignal_start (&sig);
698		1062
		1063	struct ev_check cw;
		1064	evcheck_init (&cw, gcb);
		1065	evcheck_start (&cw);
		1066
		1067	struct ev_idle iw;
		1068	evidle_init (&iw, gcb);
		1069	evidle_start (&iw);
		1070
699	ev_loop (0);	1071	ev_loop (0);
700		1072
701	return 0;	1073	return 0;
702	}	1074	}
703		1075

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Comparing libev/ev.c (file contents): Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs. Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC