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

Comparing libev/ev.c (file contents):
Revision 1.4 by root, Tue Oct 30 23:10:33 2007 UTC vs.
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC

…		…
1	#include <math.h>	1	#include <math.h>
2	#include <stdlib.h>	2	#include <stdlib.h>
		3	#include <unistd.h>
		4	#include <fcntl.h>
		5	#include <signal.h>
		6	#include <stddef.h>
3		7
4	#include <stdio.h>	8	#include <stdio.h>
5		9
6	#include <assert.h>	10	#include <assert.h>
7	#include <errno.h>	11	#include <errno.h>
8	#include <sys/time.h>	12	#include <sys/time.h>
9	#include <time.h>	13	#include <time.h>
10		14
11	#ifdef CLOCK_MONOTONIC
12	# define HAVE_MONOTONIC 1
13	#endif
14
15	#define HAVE_EPOLL 1	15	#define HAVE_EPOLL 1
16	#define HAVE_REALTIME 1	16
		17	#ifndef HAVE_MONOTONIC
		18	# ifdef CLOCK_MONOTONIC
		19	# define HAVE_MONOTONIC 1
		20	# endif
		21	#endif
		22
		23	#ifndef HAVE_SELECT
17	#define HAVE_SELECT 0	24	# define HAVE_SELECT 1
		25	#endif
		26
		27	#ifndef HAVE_EPOLL
		28	# define HAVE_EPOLL 0
		29	#endif
		30
		31	#ifndef HAVE_REALTIME
		32	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */
		33	#endif
18		34
19	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	35	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
20	#define MAX_BLOCKTIME 60.	36	#define MAX_BLOCKTIME 60.
21		37
22	#include "ev.h"	38	#include "ev.h"
23		39
24	struct ev_watcher {	40	typedef struct ev_watcher *W;
25	EV_WATCHER (ev_watcher);
26	};
27
28	struct ev_watcher_list {	41	typedef struct ev_watcher_list *WL;
29	EV_WATCHER_LIST (ev_watcher_list);	42	typedef struct ev_watcher_time *WT;
30	};
31		43
32	static ev_tstamp now, diff; /* monotonic clock */	44	static ev_tstamp now, diff; /* monotonic clock */
33	ev_tstamp ev_now;	45	ev_tstamp ev_now;
34	int ev_method;	46	int ev_method;
35		47
36	static int have_monotonic; /* runtime */	48	static int have_monotonic; /* runtime */
37		49
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	50	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
39	static void (*method_reify)(void);	51	static void (*method_modify)(int fd, int oev, int nev);
40	static void (*method_poll)(ev_tstamp timeout);	52	static void (*method_poll)(ev_tstamp timeout);
		53
		54	/*****************************************************************************/
41		55
42	ev_tstamp	56	ev_tstamp
43	ev_time (void)	57	ev_time (void)
44	{	58	{
45	#if HAVE_REALTIME	59	#if HAVE_REALTIME
70		84
71	#define array_needsize(base,cur,cnt,init) \	85	#define array_needsize(base,cur,cnt,init) \
72	if ((cnt) > cur) \	86	if ((cnt) > cur) \
73	{ \	87	{ \
74	int newcnt = cur ? cur << 1 : 16; \	88	int newcnt = cur ? cur << 1 : 16; \
75	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\
76	base = realloc (base, sizeof (base) (newcnt)); \	89	base = realloc (base, sizeof (base) (newcnt)); \
77	init (base + cur, newcnt - cur); \	90	init (base + cur, newcnt - cur); \
78	cur = newcnt; \	91	cur = newcnt; \
79	}	92	}
80		93
		94	/*****************************************************************************/
		95
81	typedef struct	96	typedef struct
82	{	97	{
83	struct ev_io *head;	98	struct ev_io *head;
84	unsigned char wev, rev; /* want, received event set */	99	unsigned char wev, rev; /* want, received event set */
85	} ANFD;	100	} ANFD;
…		…
101	}	116	}
102	}	117	}
103		118
104	typedef struct	119	typedef struct
105	{	120	{
106	struct ev_watcher *w;	121	W w;
107	int events;	122	int events;
108	} ANPENDING;	123	} ANPENDING;
109		124
110	static ANPENDING *pendings;	125	static ANPENDING *pendings;
111	static int pendingmax, pendingcnt;	126	static int pendingmax, pendingcnt;
112		127
113	static void	128	static void
114	event (struct ev_watcher *w, int events)	129	event (W w, int events)
115	{	130	{
		131	if (w->active)
		132	{
116	w->pending = ++pendingcnt;	133	w->pending = ++pendingcnt;
117	array_needsize (pendings, pendingmax, pendingcnt, );	134	array_needsize (pendings, pendingmax, pendingcnt, );
118	pendings [pendingcnt - 1].w = w;	135	pendings [pendingcnt - 1].w = w;
119	pendings [pendingcnt - 1].events = events;	136	pendings [pendingcnt - 1].events = events;
		137	}
120	}	138	}
121		139
122	static void	140	static void
123	fd_event (int fd, int events)	141	fd_event (int fd, int events)
124	{	142	{
…		…
128	for (w = anfd->head; w; w = w->next)	146	for (w = anfd->head; w; w = w->next)
129	{	147	{
130	int ev = w->events & events;	148	int ev = w->events & events;
131		149
132	if (ev)	150	if (ev)
133	event ((struct ev_watcher *)w, ev);	151	event ((W)w, ev);
134	}	152	}
135	}	153	}
136		154
		155	static void
		156	queue_events (W *events, int eventcnt, int type)
		157	{
		158	int i;
		159
		160	for (i = 0; i < eventcnt; ++i)
		161	event (events [i], type);
		162	}
		163
		164	/*****************************************************************************/
		165
137	static struct ev_timer **atimers;	166	static struct ev_timer **timers;
138	static int atimermax, atimercnt;	167	static int timermax, timercnt;
139		168
140	static struct ev_timer **rtimers;	169	static struct ev_periodic **periodics;
141	static int rtimermax, rtimercnt;	170	static int periodicmax, periodiccnt;
142		171
143	static void	172	static void
144	upheap (struct ev_timer **timers, int k)	173	upheap (WT *timers, int k)
145	{	174	{
146	struct ev_timer *w = timers [k];	175	WT w = timers [k];
147		176
148	while (k && timers [k >> 1]->at > w->at)	177	while (k && timers [k >> 1]->at > w->at)
149	{	178	{
150	timers [k] = timers [k >> 1];	179	timers [k] = timers [k >> 1];
151	timers [k]->active = k + 1;	180	timers [k]->active = k + 1;
…		…
156	timers [k]->active = k + 1;	185	timers [k]->active = k + 1;
157		186
158	}	187	}
159		188
160	static void	189	static void
161	downheap (struct ev_timer **timers, int N, int k)	190	downheap (WT *timers, int N, int k)
162	{	191	{
163	struct ev_timer *w = timers [k];	192	WT w = timers [k];
164		193
165	while (k < (N >> 1))	194	while (k < (N >> 1))
166	{	195	{
167	int j = k << 1;	196	int j = k << 1;
168		197
…		…
179		208
180	timers [k] = w;	209	timers [k] = w;
181	timers [k]->active = k + 1;	210	timers [k]->active = k + 1;
182	}	211	}
183		212
184	static struct ev_signal **signals;	213	/*****************************************************************************/
		214
		215	typedef struct
		216	{
		217	struct ev_signal *head;
		218	sig_atomic_t gotsig;
		219	} ANSIG;
		220
		221	static ANSIG *signals;
185	static int signalmax;	222	static int signalmax;
186		223
		224	static int sigpipe [2];
		225	static sig_atomic_t gotsig;
		226	static struct ev_io sigev;
		227
187	static void	228	static void
188	signals_init (struct ev_signal **base, int count)	229	signals_init (ANSIG *base, int count)
189	{	230	{
190	while (count--)	231	while (count--)
191	*base++ = 0;	232	{
		233	base->head = 0;
		234	base->gotsig = 0;
		235	++base;
		236	}
192	}	237	}
		238
		239	static void
		240	sighandler (int signum)
		241	{
		242	signals [signum - 1].gotsig = 1;
		243
		244	if (!gotsig)
		245	{
		246	gotsig = 1;
		247	write (sigpipe [1], &gotsig, 1);
		248	}
		249	}
		250
		251	static void
		252	sigcb (struct ev_io *iow, int revents)
		253	{
		254	struct ev_signal *w;
		255	int sig;
		256
		257	gotsig = 0;
		258	read (sigpipe [0], &revents, 1);
		259
		260	for (sig = signalmax; sig--; )
		261	if (signals [sig].gotsig)
		262	{
		263	signals [sig].gotsig = 0;
		264
		265	for (w = signals [sig].head; w; w = w->next)
		266	event ((W)w, EV_SIGNAL);
		267	}
		268	}
		269
		270	static void
		271	siginit (void)
		272	{
		273	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		274	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		275
		276	/* rather than sort out wether we really need nb, set it */
		277	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		278	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		279
		280	evio_set (&sigev, sigpipe [0], EV_READ);
		281	evio_start (&sigev);
		282	}
		283
		284	/*****************************************************************************/
		285
		286	static struct ev_idle **idles;
		287	static int idlemax, idlecnt;
		288
		289	static struct ev_check **checks;
		290	static int checkmax, checkcnt;
		291
		292	/*****************************************************************************/
193		293
194	#if HAVE_EPOLL	294	#if HAVE_EPOLL
195	# include "ev_epoll.c"	295	# include "ev_epoll.c"
196	#endif	296	#endif
197	#if HAVE_SELECT	297	#if HAVE_SELECT
…		…
210		310
211	ev_now = ev_time ();	311	ev_now = ev_time ();
212	now = get_clock ();	312	now = get_clock ();
213	diff = ev_now - now;	313	diff = ev_now - now;
214		314
		315	if (pipe (sigpipe))
		316	return 0;
		317
		318	ev_method = EVMETHOD_NONE;
215	#if HAVE_EPOLL	319	#if HAVE_EPOLL
216	if (epoll_init (flags))	320	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
217	return ev_method;
218	#endif	321	#endif
219	#if HAVE_SELECT	322	#if HAVE_SELECT
220	if (select_init (flags))	323	if (ev_method == EVMETHOD_NONE) select_init (flags);
221	return ev_method;
222	#endif	324	#endif
223		325
224	ev_method = EVMETHOD_NONE;	326	if (ev_method)
		327	{
		328	evw_init (&sigev, sigcb);
		329	siginit ();
		330	}
		331
225	return ev_method;	332	return ev_method;
226	}	333	}
227		334
		335	/*****************************************************************************/
		336
228	void ev_prefork (void)	337	void ev_prefork (void)
229	{	338	{
		339	/* nop */
230	}	340	}
231		341
232	void ev_postfork_parent (void)	342	void ev_postfork_parent (void)
233	{	343	{
		344	/* nop */
234	}	345	}
235		346
236	void ev_postfork_child (void)	347	void ev_postfork_child (void)
237	{	348	{
238	#if HAVE_EPOLL	349	#if HAVE_EPOLL
		350	if (ev_method == EVMETHOD_EPOLL)
239	epoll_postfork_child ();	351	epoll_postfork_child ();
240	#endif	352	#endif
		353
		354	evio_stop (&sigev);
		355	close (sigpipe [0]);
		356	close (sigpipe [1]);
		357	pipe (sigpipe);
		358	siginit ();
		359	}
		360
		361	/*****************************************************************************/
		362
		363	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;
241	}	387	}
242		388
243	static void	389	static void
244	call_pending ()	390	call_pending ()
245	{	391	{
…		…
258		404
259	pendingcnt = 0;	405	pendingcnt = 0;
260	}	406	}
261		407
262	static void	408	static void
263	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	409	timers_reify ()
264	{	410	{
265	while (timercnt && timers [0]->at <= now)	411	while (timercnt && timers [0]->at <= now)
266	{	412	{
267	struct ev_timer *w = timers [0];	413	struct ev_timer *w = timers [0];
		414
		415	event ((W)w, EV_TIMEOUT);
268		416
269	/* first reschedule or stop timer */	417	/* first reschedule or stop timer */
270	if (w->repeat)	418	if (w->repeat)
271	{	419	{
272	if (w->is_abs)
273	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
274	else
275	w->at = now + w->repeat;	420	w->at = now + w->repeat;
276		421	assert (("timer timeout in the past, negative repeat?", w->at > now));
277	assert (w->at > now);
278
279	downheap (timers, timercnt, 0);	422	downheap ((WT *)timers, timercnt, 0);
280	}	423	}
281	else	424	else
282	{
283	evtimer_stop (w); /* nonrepeating: stop timer */	425	evtimer_stop (w); /* nonrepeating: stop timer */
284	--timercnt; /* maybe pass by reference instead? */	426	}
		427	}
		428
		429	static void
		430	periodics_reify ()
		431	{
		432	while (periodiccnt && periodics [0]->at <= ev_now)
		433	{
		434	struct ev_periodic *w = periodics [0];
		435
		436	/* first reschedule or stop timer */
		437	if (w->interval)
285	}	438	{
		439	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		440	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));
		441	downheap ((WT *)periodics, periodiccnt, 0);
		442	}
		443	else
		444	evperiodic_stop (w); /* nonrepeating: stop timer */
286		445
287	event ((struct ev_watcher *)w, EV_TIMEOUT);	446	event ((W)w, EV_TIMEOUT);
		447	}
		448	}
		449
		450	static void
		451	periodics_reschedule (ev_tstamp diff)
		452	{
		453	int i;
		454
		455	/* adjust periodics after time jump */
		456	for (i = 0; i < periodiccnt; ++i)
		457	{
		458	struct ev_periodic *w = periodics [i];
		459
		460	if (w->interval)
		461	{
		462	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		463
		464	if (fabs (diff) >= 1e-4)
		465	{
		466	evperiodic_stop (w);
		467	evperiodic_start (w);
		468
		469	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		470	}
		471	}
288	}	472	}
289	}	473	}
290		474
291	static void	475	static void
292	time_update ()	476	time_update ()
293	{	477	{
294	int i;	478	int i;
		479
295	ev_now = ev_time ();	480	ev_now = ev_time ();
296		481
297	if (have_monotonic)	482	if (have_monotonic)
298	{	483	{
299	ev_tstamp odiff = diff;	484	ev_tstamp odiff = diff;
300		485
301	/* detecting time jumps is much more difficult */
302	for (i = 2; --i; ) /* loop a few times, before making important decisions */	486	for (i = 4; --i; ) /* loop a few times, before making important decisions */
303	{	487	{
304	now = get_clock ();	488	now = get_clock ();
305	diff = ev_now - now;	489	diff = ev_now - now;
306		490
307	if (fabs (odiff - diff) < MIN_TIMEJUMP)	491	if (fabs (odiff - diff) < MIN_TIMEJUMP)
308	return; /* all is well */	492	return; /* all is well */
309		493
310	ev_now = ev_time ();	494	ev_now = ev_time ();
311	}	495	}
312		496
313	/* time jump detected, reschedule atimers */	497	periodics_reschedule (diff - odiff);
314	for (i = 0; i < atimercnt; ++i)	498	/* no timer adjustment, as the monotonic clock doesn't jump */
315	{
316	struct ev_timer *w = atimers [i];
317	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
318	}
319	}	499	}
320	else	500	else
321	{	501	{
322	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	502	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
323	/* time jump detected, adjust rtimers */	503	{
		504	periodics_reschedule (ev_now - now);
		505
		506	/* adjust timers. this is easy, as the offset is the same for all */
324	for (i = 0; i < rtimercnt; ++i)	507	for (i = 0; i < timercnt; ++i)
325	rtimers [i]->at += ev_now - now;	508	timers [i]->at += diff;
		509	}
326		510
327	now = ev_now;	511	now = ev_now;
328	}	512	}
329	}	513	}
330		514
331	int ev_loop_done;	515	int ev_loop_done;
332		516
333	void ev_loop (int flags)	517	void ev_loop (int flags)
334	{	518	{
335	double block;	519	double block;
336	ev_loop_done = flags & EVLOOP_ONESHOT;	520	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
		521
		522	if (checkcnt)
		523	{
		524	queue_events ((W *)checks, checkcnt, EV_CHECK);
		525	call_pending ();
		526	}
337		527
338	do	528	do
339	{	529	{
340	/* update fd-related kernel structures */	530	/* update fd-related kernel structures */
341	method_reify (); fdchangecnt = 0;	531	fd_reify ();
342		532
343	/* calculate blocking time */	533	/* calculate blocking time */
		534
		535	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
		536	ev_now = ev_time ();
		537
344	if (flags & EVLOOP_NONBLOCK)	538	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
345	block = 0.;	539	block = 0.;
346	else	540	else
347	{	541	{
348	block = MAX_BLOCKTIME;	542	block = MAX_BLOCKTIME;
349		543
350	if (rtimercnt)	544	if (timercnt)
351	{	545	{
352	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	546	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
353	if (block > to) block = to;	547	if (block > to) block = to;
354	}	548	}
355		549
356	if (atimercnt)	550	if (periodiccnt)
357	{	551	{
358	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	552	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
359	if (block > to) block = to;	553	if (block > to) block = to;
360	}	554	}
361		555
362	if (block < 0.) block = 0.;	556	if (block < 0.) block = 0.;
363	}	557	}
…		…
365	method_poll (block);	559	method_poll (block);
366		560
367	/* update ev_now, do magic */	561	/* update ev_now, do magic */
368	time_update ();	562	time_update ();
369		563
370	/* put pending timers into pendign queue and reschedule them */	564	/* queue pending timers and reschedule them */
371	/* absolute timers first */	565	periodics_reify (); /* absolute timers first */
372	timers_reify (atimers, atimercnt, ev_now);
373	/* relative timers second */	566	timers_reify (); /* relative timers second */
374	timers_reify (rtimers, rtimercnt, now);	567
		568	/* queue idle watchers unless io or timers are pending */
		569	if (!pendingcnt)
		570	queue_events ((W *)idles, idlecnt, EV_IDLE);
		571
		572	/* queue check and possibly idle watchers */
		573	queue_events ((W *)checks, checkcnt, EV_CHECK);
375		574
376	call_pending ();	575	call_pending ();
377	}	576	}
378	while (!ev_loop_done);	577	while (!ev_loop_done);
379	}
380		578
		579	if (ev_loop_done != 2)
		580	ev_loop_done = 0;
		581	}
		582
		583	/*****************************************************************************/
		584
381	static void	585	static void
382	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	586	wlist_add (WL *head, WL elem)
383	{	587	{
384	elem->next = *head;	588	elem->next = *head;
385	*head = elem;	589	*head = elem;
386	}	590	}
387		591
388	static void	592	static void
389	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	593	wlist_del (WL *head, WL elem)
390	{	594	{
391	while (*head)	595	while (*head)
392	{	596	{
393	if (*head == elem)	597	if (*head == elem)
394	{	598	{
…		…
399	head = &(*head)->next;	603	head = &(*head)->next;
400	}	604	}
401	}	605	}
402		606
403	static void	607	static void
404	ev_start (struct ev_watcher *w, int active)	608	ev_clear (W w)
405	{	609	{
		610	if (w->pending)
		611	{
		612	pendings [w->pending - 1].w = 0;
406	w->pending = 0;	613	w->pending = 0;
		614	}
		615	}
		616
		617	static void
		618	ev_start (W w, int active)
		619	{
407	w->active = active;	620	w->active = active;
408	}	621	}
409		622
410	static void	623	static void
411	ev_stop (struct ev_watcher *w)	624	ev_stop (W w)
412	{	625	{
413	if (w->pending)
414	pendings [w->pending - 1].w = 0;
415
416	w->active = 0;	626	w->active = 0;
417	/* nop */
418	}	627	}
		628
		629	/*****************************************************************************/
419		630
420	void	631	void
421	evio_start (struct ev_io *w)	632	evio_start (struct ev_io *w)
422	{	633	{
423	if (ev_is_active (w))	634	if (ev_is_active (w))
424	return;	635	return;
425		636
426	int fd = w->fd;	637	int fd = w->fd;
427		638
428	ev_start ((struct ev_watcher *)w, 1);	639	ev_start ((W)w, 1);
429	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	640	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
430	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	641	wlist_add ((WL *)&anfds[fd].head, (WL)w);
431		642
432	++fdchangecnt;	643	++fdchangecnt;
433	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	644	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
434	fdchanges [fdchangecnt - 1] = fd;	645	fdchanges [fdchangecnt - 1] = fd;
435	}	646	}
436		647
437	void	648	void
438	evio_stop (struct ev_io *w)	649	evio_stop (struct ev_io *w)
439	{	650	{
		651	ev_clear ((W)w);
440	if (!ev_is_active (w))	652	if (!ev_is_active (w))
441	return;	653	return;
442		654
443	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	655	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
444	ev_stop ((struct ev_watcher *)w);	656	ev_stop ((W)w);
445		657
446	++fdchangecnt;	658	++fdchangecnt;
447	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	659	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
448	fdchanges [fdchangecnt - 1] = w->fd;	660	fdchanges [fdchangecnt - 1] = w->fd;
449	}	661	}
…		…
452	evtimer_start (struct ev_timer *w)	664	evtimer_start (struct ev_timer *w)
453	{	665	{
454	if (ev_is_active (w))	666	if (ev_is_active (w))
455	return;	667	return;
456		668
457	if (w->is_abs)	669	w->at += now;
458	{
459	/* this formula differs from the one in timer_reify becuse we do not round up */
460	if (w->repeat)
461	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
462		670
463	ev_start ((struct ev_watcher *)w, ++atimercnt);	671	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
		672
		673	ev_start ((W)w, ++timercnt);
464	array_needsize (atimers, atimermax, atimercnt, );	674	array_needsize (timers, timermax, timercnt, );
465	atimers [atimercnt - 1] = w;	675	timers [timercnt - 1] = w;
466	upheap (atimers, atimercnt - 1);	676	upheap ((WT *)timers, timercnt - 1);
467	}
468	else
469	{
470	w->at += now;
471
472	ev_start ((struct ev_watcher *)w, ++rtimercnt);
473	array_needsize (rtimers, rtimermax, rtimercnt, );
474	rtimers [rtimercnt - 1] = w;
475	upheap (rtimers, rtimercnt - 1);
476	}
477
478	}	677	}
479		678
480	void	679	void
481	evtimer_stop (struct ev_timer *w)	680	evtimer_stop (struct ev_timer *w)
482	{	681	{
		682	ev_clear ((W)w);
483	if (!ev_is_active (w))	683	if (!ev_is_active (w))
484	return;	684	return;
485		685
486	if (w->is_abs)
487	{
488	if (w->active < atimercnt--)	686	if (w->active < timercnt--)
489	{	687	{
490	atimers [w->active - 1] = atimers [atimercnt];	688	timers [w->active - 1] = timers [timercnt];
		689	downheap ((WT *)timers, timercnt, w->active - 1);
		690	}
		691
		692	w->at = w->repeat;
		693
		694	ev_stop ((W)w);
		695	}
		696
		697	void
		698	evtimer_again (struct ev_timer *w)
		699	{
		700	if (ev_is_active (w))
		701	{
		702	if (w->repeat)
		703	{
		704	w->at = now + w->repeat;
491	downheap (atimers, atimercnt, w->active - 1);	705	downheap ((WT *)timers, timercnt, w->active - 1);
492	}
493	}
494	else
495	{
496	if (w->active < rtimercnt--)
497	{	706	}
498	rtimers [w->active - 1] = rtimers [rtimercnt];	707	else
499	downheap (rtimers, rtimercnt, w->active - 1);	708	evtimer_stop (w);
500	}	709	}
		710	else if (w->repeat)
		711	evtimer_start (w);
		712	}
		713
		714	void
		715	evperiodic_start (struct ev_periodic *w)
		716	{
		717	if (ev_is_active (w))
		718	return;
		719
		720	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
		721
		722	/* this formula differs from the one in periodic_reify because we do not always round up */
		723	if (w->interval)
		724	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
		725
		726	ev_start ((W)w, ++periodiccnt);
		727	array_needsize (periodics, periodicmax, periodiccnt, );
		728	periodics [periodiccnt - 1] = w;
		729	upheap ((WT *)periodics, periodiccnt - 1);
		730	}
		731
		732	void
		733	evperiodic_stop (struct ev_periodic *w)
		734	{
		735	ev_clear ((W)w);
		736	if (!ev_is_active (w))
		737	return;
		738
		739	if (w->active < periodiccnt--)
501	}	740	{
		741	periodics [w->active - 1] = periodics [periodiccnt];
		742	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		743	}
502		744
503	ev_stop ((struct ev_watcher *)w);	745	ev_stop ((W)w);
504	}	746	}
505		747
506	void	748	void
507	evsignal_start (struct ev_signal *w)	749	evsignal_start (struct ev_signal *w)
508	{	750	{
509	if (ev_is_active (w))	751	if (ev_is_active (w))
510	return;	752	return;
511		753
512	ev_start ((struct ev_watcher *)w, 1);	754	ev_start ((W)w, 1);
513	array_needsize (signals, signalmax, w->signum, signals_init);	755	array_needsize (signals, signalmax, w->signum, signals_init);
514	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		757
		758	if (!w->next)
		759	{
		760	struct sigaction sa;
		761	sa.sa_handler = sighandler;
		762	sigfillset (&sa.sa_mask);
		763	sa.sa_flags = 0;
		764	sigaction (w->signum, &sa, 0);
		765	}
515	}	766	}
516		767
517	void	768	void
518	evsignal_stop (struct ev_signal *w)	769	evsignal_stop (struct ev_signal *w)
519	{	770	{
		771	ev_clear ((W)w);
520	if (!ev_is_active (w))	772	if (!ev_is_active (w))
521	return;	773	return;
522		774
523	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
524	ev_stop ((struct ev_watcher *)w);	776	ev_stop ((W)w);
525	}
526		777
		778	if (!signals [w->signum - 1].head)
		779	signal (w->signum, SIG_DFL);
		780	}
		781
		782	void evidle_start (struct ev_idle *w)
		783	{
		784	if (ev_is_active (w))
		785	return;
		786
		787	ev_start ((W)w, ++idlecnt);
		788	array_needsize (idles, idlemax, idlecnt, );
		789	idles [idlecnt - 1] = w;
		790	}
		791
		792	void evidle_stop (struct ev_idle *w)
		793	{
		794	ev_clear ((W)w);
		795	if (ev_is_active (w))
		796	return;
		797
		798	idles [w->active - 1] = idles [--idlecnt];
		799	ev_stop ((W)w);
		800	}
		801
		802	void evcheck_start (struct ev_check *w)
		803	{
		804	if (ev_is_active (w))
		805	return;
		806
		807	ev_start ((W)w, ++checkcnt);
		808	array_needsize (checks, checkmax, checkcnt, );
		809	checks [checkcnt - 1] = w;
		810	}
		811
		812	void evcheck_stop (struct ev_check *w)
		813	{
		814	ev_clear ((W)w);
		815	if (ev_is_active (w))
		816	return;
		817
		818	checks [w->active - 1] = checks [--checkcnt];
		819	ev_stop ((W)w);
		820	}
		821
527	/*****************************************************************************/	822	/*****************************************************************************/
		823
		824	struct ev_once
		825	{
		826	struct ev_io io;
		827	struct ev_timer to;
		828	void (cb)(int revents, void arg);
		829	void *arg;
		830	};
		831
		832	static void
		833	once_cb (struct ev_once *once, int revents)
		834	{
		835	void (cb)(int revents, void arg) = once->cb;
		836	void *arg = once->arg;
		837
		838	evio_stop (&once->io);
		839	evtimer_stop (&once->to);
		840	free (once);
		841
		842	cb (revents, arg);
		843	}
		844
		845	static void
		846	once_cb_io (struct ev_io *w, int revents)
		847	{
		848	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		849	}
		850
		851	static void
		852	once_cb_to (struct ev_timer *w, int revents)
		853	{
		854	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		855	}
		856
		857	void
		858	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		859	{
		860	struct ev_once *once = malloc (sizeof (struct ev_once));
		861
		862	if (!once)
		863	cb (EV_ERROR, arg);
		864	else
		865	{
		866	once->cb = cb;
		867	once->arg = arg;
		868
		869	evw_init (&once->io, once_cb_io);
		870
		871	if (fd >= 0)
		872	{
		873	evio_set (&once->io, fd, events);
		874	evio_start (&once->io);
		875	}
		876
		877	evw_init (&once->to, once_cb_to);
		878
		879	if (timeout >= 0.)
		880	{
		881	evtimer_set (&once->to, timeout, 0.);
		882	evtimer_start (&once->to);
		883	}
		884	}
		885	}
		886
		887	/*****************************************************************************/
		888
528	#if 1	889	#if 0
		890
		891	struct ev_io wio;
529		892
530	static void	893	static void
531	sin_cb (struct ev_io *w, int revents)	894	sin_cb (struct ev_io *w, int revents)
532	{	895	{
533	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	896	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
539	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	902	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
540	evtimer_stop (w);	903	evtimer_stop (w);
541	evtimer_start (w);	904	evtimer_start (w);
542	}	905	}
543		906
		907	static void
		908	scb (struct ev_signal *w, int revents)
		909	{
		910	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		911	evio_stop (&wio);
		912	evio_start (&wio);
		913	}
		914
		915	static void
		916	gcb (struct ev_signal *w, int revents)
		917	{
		918	fprintf (stderr, "generic %x\n", revents);
		919
		920	}
		921
544	int main (void)	922	int main (void)
545	{	923	{
546	struct ev_io sin;
547
548	ev_init (0);	924	ev_init (0);
549		925
550	evw_init (&sin, sin_cb, 55);
551	evio_set (&sin, 0, EV_READ);	926	evio_init (&wio, sin_cb, 0, EV_READ);
552	evio_start (&sin);	927	evio_start (&wio);
553		928
554	struct ev_timer t[10000];	929	struct ev_timer t[10000];
555		930
556	#if 1	931	#if 0
557	int i;	932	int i;
558	for (i = 0; i < 10000; ++i)	933	for (i = 0; i < 10000; ++i)
559	{	934	{
560	struct ev_timer *w = t + i;	935	struct ev_timer *w = t + i;
561	evw_init (w, ocb, i);	936	evw_init (w, ocb, i);
562	evtimer_set_abs (w, drand48 (), 0.99775533);	937	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
563	evtimer_start (w);	938	evtimer_start (w);
564	if (drand48 () < 0.5)	939	if (drand48 () < 0.5)
565	evtimer_stop (w);	940	evtimer_stop (w);
566	}	941	}
567	#endif	942	#endif
568		943
569	struct ev_timer t1;	944	struct ev_timer t1;
570	evw_init (&t1, ocb, 0);	945	evtimer_init (&t1, ocb, 5, 10);
571	evtimer_set_abs (&t1, 5, 10);
572	evtimer_start (&t1);	946	evtimer_start (&t1);
573		947
		948	struct ev_signal sig;
		949	evsignal_init (&sig, scb, SIGQUIT);
		950	evsignal_start (&sig);
		951
		952	struct ev_check cw;
		953	evcheck_init (&cw, gcb);
		954	evcheck_start (&cw);
		955
		956	struct ev_idle iw;
		957	evidle_init (&iw, gcb);
		958	evidle_start (&iw);
		959
574	ev_loop (0);	960	ev_loop (0);
575		961
576	return 0;	962	return 0;
577	}	963	}
578		964

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Comparing libev/ev.c (file contents): Revision 1.4 by root, Tue Oct 30 23:10:33 2007 UTC vs. Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.4 by root, Tue Oct 30 23:10:33 2007 UTC vs.
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC