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

Comparing libev/ev.c (file contents):
Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs.
Revision 1.20 by root, Wed Oct 31 18:28:00 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>
		32	#include <unistd.h>
		33	#include <fcntl.h>
		34	#include <signal.h>
		35	#include <stddef.h>
3		36
4	#include <stdio.h>	37	#include <stdio.h>
5		38
		39	#include <assert.h>
6	#include <errno.h>	40	#include <errno.h>
7	#include <sys/time.h>	41	#include <sys/time.h>
8	#include <time.h>	42	#include <time.h>
9		43
		44	#ifndef HAVE_MONOTONIC
10	#ifdef CLOCK_MONOTONIC	45	# ifdef CLOCK_MONOTONIC
11	# define HAVE_MONOTONIC 1	46	# define HAVE_MONOTONIC 1
12	#endif	47	# endif
		48	#endif
13		49
14	#define HAVE_EPOLL 1	50	#ifndef HAVE_SELECT
15	#define HAVE_REALTIME 1
16	#define HAVE_SELECT 0	51	# define HAVE_SELECT 1
		52	#endif
17		53
		54	#ifndef HAVE_EPOLL
		55	# define HAVE_EPOLL 0
		56	#endif
		57
		58	#ifndef HAVE_REALTIME
		59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */
		60	#endif
		61
		62	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
18	#define MAX_BLOCKTIME 60.	63	#define MAX_BLOCKTIME 60.
19		64
20	#include "ev.h"	65	#include "ev.h"
21		66
22	struct ev_watcher {	67	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);
24	};
25
26	struct ev_watcher_list {	68	typedef struct ev_watcher_list *WL;
27	EV_WATCHER_LIST (ev_watcher_list);	69	typedef struct ev_watcher_time *WT;
28	};
29		70
		71	static ev_tstamp now, diff; /* monotonic clock */
30	ev_tstamp ev_now;	72	ev_tstamp ev_now;
31	int ev_method;	73	int ev_method;
32		74
33	static int have_monotonic; /* runtime */	75	static int have_monotonic; /* runtime */
34		76
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
36	static void (*method_reify)(void);	78	static void (*method_modify)(int fd, int oev, int nev);
37	static void (*method_poll)(ev_tstamp timeout);	79	static void (*method_poll)(ev_tstamp timeout);
		80
		81	/*****************************************************************************/
38		82
39	ev_tstamp	83	ev_tstamp
40	ev_time (void)	84	ev_time (void)
41	{	85	{
42	#if HAVE_REALTIME	86	#if HAVE_REALTIME
67		111
68	#define array_needsize(base,cur,cnt,init) \	112	#define array_needsize(base,cur,cnt,init) \
69	if ((cnt) > cur) \	113	if ((cnt) > cur) \
70	{ \	114	{ \
71	int newcnt = cur ? cur << 1 : 16; \	115	int newcnt = cur ? cur << 1 : 16; \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\
73	base = realloc (base, sizeof (base) (newcnt)); \	116	base = realloc (base, sizeof (base) (newcnt)); \
74	init (base + cur, newcnt - cur); \	117	init (base + cur, newcnt - cur); \
75	cur = newcnt; \	118	cur = newcnt; \
76	}	119	}
77		120
		121	/*****************************************************************************/
		122
78	typedef struct	123	typedef struct
79	{	124	{
80	struct ev_io *head;	125	struct ev_io *head;
81	unsigned char wev, rev; /* want, received event set */	126	unsigned char wev, rev; /* want, received event set */
82	} ANFD;	127	} ANFD;
…		…
98	}	143	}
99	}	144	}
100		145
101	typedef struct	146	typedef struct
102	{	147	{
103	struct ev_watcher *w;	148	W w;
104	int events;	149	int events;
105	} ANPENDING;	150	} ANPENDING;
106		151
107	static ANPENDING *pendings;	152	static ANPENDING *pendings;
108	static int pendingmax, pendingcnt;	153	static int pendingmax, pendingcnt;
109		154
110	static void	155	static void
111	event (struct ev_watcher *w, int events)	156	event (W w, int events)
112	{	157	{
		158	if (w->active)
		159	{
113	w->pending = ++pendingcnt;	160	w->pending = ++pendingcnt;
114	array_needsize (pendings, pendingmax, pendingcnt, );	161	array_needsize (pendings, pendingmax, pendingcnt, );
115	pendings [pendingcnt - 1].w = w;	162	pendings [pendingcnt - 1].w = w;
116	pendings [pendingcnt - 1].events = events;	163	pendings [pendingcnt - 1].events = events;
		164	}
117	}	165	}
118		166
119	static void	167	static void
120	fd_event (int fd, int events)	168	fd_event (int fd, int events)
121	{	169	{
…		…
125	for (w = anfd->head; w; w = w->next)	173	for (w = anfd->head; w; w = w->next)
126	{	174	{
127	int ev = w->events & events;	175	int ev = w->events & events;
128		176
129	if (ev)	177	if (ev)
130	event ((struct ev_watcher *)w, ev);	178	event ((W)w, ev);
131	}	179	}
132	}	180	}
		181
		182	static void
		183	queue_events (W *events, int eventcnt, int type)
		184	{
		185	int i;
		186
		187	for (i = 0; i < eventcnt; ++i)
		188	event (events [i], type);
		189	}
		190
		191	/* called on EBADF to verify fds */
		192	static void
		193	fd_recheck ()
		194	{
		195	int fd;
		196
		197	for (fd = 0; fd < anfdmax; ++fd)
		198	if (anfds [fd].wev)
		199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		200	while (anfds [fd].head)
		201	evio_stop (anfds [fd].head);
		202	}
		203
		204	/*****************************************************************************/
133		205
134	static struct ev_timer **timers;	206	static struct ev_timer **timers;
135	static int timermax, timercnt;	207	static int timermax, timercnt;
136		208
		209	static struct ev_periodic **periodics;
		210	static int periodicmax, periodiccnt;
		211
137	static void	212	static void
138	upheap (int k)	213	upheap (WT *timers, int k)
139	{	214	{
140	struct ev_timer *w = timers [k];	215	WT w = timers [k];
141		216
142	while (k && timers [k >> 1]->at > w->at)	217	while (k && timers [k >> 1]->at > w->at)
143	{	218	{
144	timers [k] = timers [k >> 1];	219	timers [k] = timers [k >> 1];
145	timers [k]->active = k + 1;	220	timers [k]->active = k + 1;
…		…
150	timers [k]->active = k + 1;	225	timers [k]->active = k + 1;
151		226
152	}	227	}
153		228
154	static void	229	static void
155	downheap (int k)	230	downheap (WT *timers, int N, int k)
156	{	231	{
157	struct ev_timer *w = timers [k];	232	WT w = timers [k];
158		233
159	while (k < (timercnt >> 1))	234	while (k < (N >> 1))
160	{	235	{
161	int j = k << 1;	236	int j = k << 1;
162		237
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
164	++j;	239	++j;
165		240
166	if (w->at <= timers [j]->at)	241	if (w->at <= timers [j]->at)
167	break;	242	break;
168		243
…		…
173		248
174	timers [k] = w;	249	timers [k] = w;
175	timers [k]->active = k + 1;	250	timers [k]->active = k + 1;
176	}	251	}
177		252
178	static struct ev_signal **signals;	253	/*****************************************************************************/
		254
		255	typedef struct
		256	{
		257	struct ev_signal *head;
		258	sig_atomic_t gotsig;
		259	} ANSIG;
		260
		261	static ANSIG *signals;
179	static int signalmax, signalcnt;	262	static int signalmax;
180		263
		264	static int sigpipe [2];
		265	static sig_atomic_t gotsig;
		266	static struct ev_io sigev;
		267
181	static void	268	static void
182	signals_init (struct ev_signal **base, int count)	269	signals_init (ANSIG *base, int count)
183	{	270	{
184	while (count--)	271	while (count--)
185	*base++ = 0;	272	{
		273	base->head = 0;
		274	base->gotsig = 0;
		275	++base;
		276	}
186	}	277	}
		278
		279	static void
		280	sighandler (int signum)
		281	{
		282	signals [signum - 1].gotsig = 1;
		283
		284	if (!gotsig)
		285	{
		286	gotsig = 1;
		287	write (sigpipe [1], &gotsig, 1);
		288	}
		289	}
		290
		291	static void
		292	sigcb (struct ev_io *iow, int revents)
		293	{
		294	struct ev_signal *w;
		295	int sig;
		296
		297	gotsig = 0;
		298	read (sigpipe [0], &revents, 1);
		299
		300	for (sig = signalmax; sig--; )
		301	if (signals [sig].gotsig)
		302	{
		303	signals [sig].gotsig = 0;
		304
		305	for (w = signals [sig].head; w; w = w->next)
		306	event ((W)w, EV_SIGNAL);
		307	}
		308	}
		309
		310	static void
		311	siginit (void)
		312	{
		313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		315
		316	/* rather than sort out wether we really need nb, set it */
		317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		319
		320	evio_set (&sigev, sigpipe [0], EV_READ);
		321	evio_start (&sigev);
		322	}
		323
		324	/*****************************************************************************/
		325
		326	static struct ev_idle **idles;
		327	static int idlemax, idlecnt;
		328
		329	static struct ev_prepare **prepares;
		330	static int preparemax, preparecnt;
		331
		332	static struct ev_check **checks;
		333	static int checkmax, checkcnt;
		334
		335	/*****************************************************************************/
187		336
188	#if HAVE_EPOLL	337	#if HAVE_EPOLL
189	# include "ev_epoll.c"	338	# include "ev_epoll.c"
190	#endif	339	#endif
191	#if HAVE_SELECT	340	#if HAVE_SELECT
…		…
201	have_monotonic = 1;	350	have_monotonic = 1;
202	}	351	}
203	#endif	352	#endif
204		353
205	ev_now = ev_time ();	354	ev_now = ev_time ();
		355	now = get_clock ();
		356	diff = ev_now - now;
206		357
		358	if (pipe (sigpipe))
		359	return 0;
		360
		361	ev_method = EVMETHOD_NONE;
207	#if HAVE_EPOLL	362	#if HAVE_EPOLL
208	if (epoll_init (flags))	363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
209	return ev_method;
210	#endif	364	#endif
211	#if HAVE_SELECT	365	#if HAVE_SELECT
212	if (select_init (flags))	366	if (ev_method == EVMETHOD_NONE) select_init (flags);
213	return ev_method;
214	#endif	367	#endif
215		368
216	ev_method = EVMETHOD_NONE;	369	if (ev_method)
		370	{
		371	evw_init (&sigev, sigcb);
		372	siginit ();
		373	}
		374
217	return ev_method;	375	return ev_method;
218	}	376	}
219		377
		378	/*****************************************************************************/
		379
220	void ev_prefork (void)	380	void ev_prefork (void)
221	{	381	{
		382	/* nop */
222	}	383	}
223		384
224	void ev_postfork_parent (void)	385	void ev_postfork_parent (void)
225	{	386	{
		387	/* nop */
226	}	388	}
227		389
228	void ev_postfork_child (void)	390	void ev_postfork_child (void)
229	{	391	{
230	#if HAVE_EPOLL	392	#if HAVE_EPOLL
		393	if (ev_method == EVMETHOD_EPOLL)
231	epoll_postfork_child ();	394	epoll_postfork_child ();
232	#endif	395	#endif
		396
		397	evio_stop (&sigev);
		398	close (sigpipe [0]);
		399	close (sigpipe [1]);
		400	pipe (sigpipe);
		401	siginit ();
		402	}
		403
		404	/*****************************************************************************/
		405
		406	static void
		407	fd_reify (void)
		408	{
		409	int i;
		410
		411	for (i = 0; i < fdchangecnt; ++i)
		412	{
		413	int fd = fdchanges [i];
		414	ANFD *anfd = anfds + fd;
		415	struct ev_io *w;
		416
		417	int wev = 0;
		418
		419	for (w = anfd->head; w; w = w->next)
		420	wev \|= w->events;
		421
		422	if (anfd->wev != wev)
		423	{
		424	method_modify (fd, anfd->wev, wev);
		425	anfd->wev = wev;
		426	}
		427	}
		428
		429	fdchangecnt = 0;
233	}	430	}
234		431
235	static void	432	static void
236	call_pending ()	433	call_pending ()
237	{	434	{
238	int i;	435	while (pendingcnt)
239
240	for (i = 0; i < pendingcnt; ++i)
241	{	436	{
242	ANPENDING *p = pendings + i;	437	ANPENDING *p = pendings + --pendingcnt;
243		438
244	if (p->w)	439	if (p->w)
245	{	440	{
246	p->w->pending = 0;	441	p->w->pending = 0;
247	p->w->cb (p->w, p->events);	442	p->w->cb (p->w, p->events);
248	}	443	}
249	}	444	}
250
251	pendingcnt = 0;
252	}	445	}
253		446
254	static void	447	static void
255	timer_reify (void)	448	timers_reify ()
256	{	449	{
257	while (timercnt && timers [0]->at <= ev_now)	450	while (timercnt && timers [0]->at <= now)
258	{	451	{
259	struct ev_timer *w = timers [0];	452	struct ev_timer *w = timers [0];
260		453
		454	event ((W)w, EV_TIMEOUT);
		455
261	/* first reschedule timer */	456	/* first reschedule or stop timer */
262	if (w->repeat)	457	if (w->repeat)
263	{	458	{
264	if (w->is_abs)
265	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
266	else
267	w->at = ev_now + w->repeat;	459	w->at = now + w->repeat;
268		460	assert (("timer timeout in the past, negative repeat?", w->at > now));
269	downheap (0);	461	downheap ((WT *)timers, timercnt, 0);
270	}	462	}
271	else	463	else
272	evtimer_stop (w); /* nonrepeating: stop timer */	464	evtimer_stop (w); /* nonrepeating: stop timer */
		465	}
		466	}
273		467
		468	static void
		469	periodics_reify ()
		470	{
		471	while (periodiccnt && periodics [0]->at <= ev_now)
		472	{
		473	struct ev_periodic *w = periodics [0];
		474
		475	/* first reschedule or stop timer */
		476	if (w->interval)
		477	{
		478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		479	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));
		480	downheap ((WT *)periodics, periodiccnt, 0);
		481	}
		482	else
		483	evperiodic_stop (w); /* nonrepeating: stop timer */
		484
274	event ((struct ev_watcher *)w, EV_TIMEOUT);	485	event ((W)w, EV_TIMEOUT);
		486	}
		487	}
		488
		489	static void
		490	periodics_reschedule (ev_tstamp diff)
		491	{
		492	int i;
		493
		494	/* adjust periodics after time jump */
		495	for (i = 0; i < periodiccnt; ++i)
		496	{
		497	struct ev_periodic *w = periodics [i];
		498
		499	if (w->interval)
		500	{
		501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		502
		503	if (fabs (diff) >= 1e-4)
		504	{
		505	evperiodic_stop (w);
		506	evperiodic_start (w);
		507
		508	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		509	}
		510	}
		511	}
		512	}
		513
		514	static void
		515	time_update ()
		516	{
		517	int i;
		518
		519	ev_now = ev_time ();
		520
		521	if (have_monotonic)
		522	{
		523	ev_tstamp odiff = diff;
		524
		525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		526	{
		527	now = get_clock ();
		528	diff = ev_now - now;
		529
		530	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		531	return; /* all is well */
		532
		533	ev_now = ev_time ();
		534	}
		535
		536	periodics_reschedule (diff - odiff);
		537	/* no timer adjustment, as the monotonic clock doesn't jump */
		538	}
		539	else
		540	{
		541	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
		542	{
		543	periodics_reschedule (ev_now - now);
		544
		545	/* adjust timers. this is easy, as the offset is the same for all */
		546	for (i = 0; i < timercnt; ++i)
		547	timers [i]->at += diff;
		548	}
		549
		550	now = ev_now;
275	}	551	}
276	}	552	}
277		553
278	int ev_loop_done;	554	int ev_loop_done;
279		555
280	int ev_loop (int flags)	556	void ev_loop (int flags)
281	{	557	{
282	double block;	558	double block;
283	ev_loop_done = flags & EVLOOP_ONESHOT;	559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
284		560
285	do	561	do
286	{	562	{
		563	/* queue check watchers (and execute them) */
		564	if (checkcnt)
		565	{
		566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		567	call_pending ();
		568	}
		569
287	/* update fd-related kernel structures */	570	/* update fd-related kernel structures */
288	method_reify (); fdchangecnt = 0;	571	fd_reify ();
289		572
290	/* calculate blocking time */	573	/* calculate blocking time */
		574
		575	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
291	ev_now = ev_time ();	576	ev_now = ev_time ();
292		577
293	if (flags & EVLOOP_NONBLOCK)	578	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
294	block = 0.;	579	block = 0.;
295	else if (!timercnt)
296	block = MAX_BLOCKTIME;
297	else	580	else
298	{	581	{
		582	block = MAX_BLOCKTIME;
		583
		584	if (timercnt)
		585	{
		586	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
		587	if (block > to) block = to;
		588	}
		589
		590	if (periodiccnt)
		591	{
299	block = timers [0]->at - ev_now + method_fudge;	592	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
		593	if (block > to) block = to;
		594	}
		595
300	if (block < 0.) block = 0.;	596	if (block < 0.) block = 0.;
301	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
302	}	597	}
303		598
304	method_poll (block);	599	method_poll (block);
305		600
		601	/* update ev_now, do magic */
		602	time_update ();
		603
306	/* put pending timers into pendign queue and reschedule them */	604	/* queue pending timers and reschedule them */
307	timer_reify ();	605	timers_reify (); /* relative timers called last */
		606	periodics_reify (); /* absolute timers called first */
308		607
309	ev_now = ev_time ();	608	/* queue idle watchers unless io or timers are pending */
		609	if (!pendingcnt)
		610	queue_events ((W *)idles, idlecnt, EV_IDLE);
		611
		612	/* queue check watchers, to be executed first */
		613	if (checkcnt)
		614	queue_events ((W *)checks, checkcnt, EV_CHECK);
		615
310	call_pending ();	616	call_pending ();
311	}	617	}
312	while (!ev_loop_done);	618	while (!ev_loop_done);
313	}
314		619
		620	if (ev_loop_done != 2)
		621	ev_loop_done = 0;
		622	}
		623
		624	/*****************************************************************************/
		625
315	static void	626	static void
316	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	627	wlist_add (WL *head, WL elem)
317	{	628	{
318	elem->next = *head;	629	elem->next = *head;
319	*head = elem;	630	*head = elem;
320	}	631	}
321		632
322	static void	633	static void
323	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	634	wlist_del (WL *head, WL elem)
324	{	635	{
325	while (*head)	636	while (*head)
326	{	637	{
327	if (*head == elem)	638	if (*head == elem)
328	{	639	{
…		…
333	head = &(*head)->next;	644	head = &(*head)->next;
334	}	645	}
335	}	646	}
336		647
337	static void	648	static void
338	ev_start (struct ev_watcher *w, int active)	649	ev_clear (W w)
339	{	650	{
		651	if (w->pending)
		652	{
		653	pendings [w->pending - 1].w = 0;
340	w->pending = 0;	654	w->pending = 0;
		655	}
		656	}
		657
		658	static void
		659	ev_start (W w, int active)
		660	{
341	w->active = active;	661	w->active = active;
342	}	662	}
343		663
344	static void	664	static void
345	ev_stop (struct ev_watcher *w)	665	ev_stop (W w)
346	{	666	{
347	if (w->pending)
348	pendings [w->pending - 1].w = 0;
349
350	w->active = 0;	667	w->active = 0;
351	/* nop */
352	}	668	}
		669
		670	/*****************************************************************************/
353		671
354	void	672	void
355	evio_start (struct ev_io *w)	673	evio_start (struct ev_io *w)
356	{	674	{
357	if (ev_is_active (w))	675	if (ev_is_active (w))
358	return;	676	return;
359		677
360	int fd = w->fd;	678	int fd = w->fd;
361		679
362	ev_start ((struct ev_watcher *)w, 1);	680	ev_start ((W)w, 1);
363	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	681	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
364	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	682	wlist_add ((WL *)&anfds[fd].head, (WL)w);
365		683
366	++fdchangecnt;	684	++fdchangecnt;
367	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	685	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
368	fdchanges [fdchangecnt - 1] = fd;	686	fdchanges [fdchangecnt - 1] = fd;
369	}	687	}
370		688
371	void	689	void
372	evio_stop (struct ev_io *w)	690	evio_stop (struct ev_io *w)
373	{	691	{
		692	ev_clear ((W)w);
374	if (!ev_is_active (w))	693	if (!ev_is_active (w))
375	return;	694	return;
376		695
377	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	696	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
378	ev_stop ((struct ev_watcher *)w);	697	ev_stop ((W)w);
379		698
380	++fdchangecnt;	699	++fdchangecnt;
381	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	700	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
382	fdchanges [fdchangecnt - 1] = w->fd;	701	fdchanges [fdchangecnt - 1] = w->fd;
383	}	702	}
…		…
386	evtimer_start (struct ev_timer *w)	705	evtimer_start (struct ev_timer *w)
387	{	706	{
388	if (ev_is_active (w))	707	if (ev_is_active (w))
389	return;	708	return;
390		709
391	if (w->is_abs)
392	{
393	/* this formula differs from the one in timer_reify becuse we do not round up */
394	if (w->repeat)
395	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
396	}
397	else
398	w->at += ev_now;	710	w->at += now;
399		711
400	ev_start ((struct ev_watcher *)w, ++timercnt);	712	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
		713
		714	ev_start ((W)w, ++timercnt);
401	array_needsize (timers, timermax, timercnt, );	715	array_needsize (timers, timermax, timercnt, );
402	timers [timercnt - 1] = w;	716	timers [timercnt - 1] = w;
403	upheap (timercnt - 1);	717	upheap ((WT *)timers, timercnt - 1);
404	}	718	}
405		719
406	void	720	void
407	evtimer_stop (struct ev_timer *w)	721	evtimer_stop (struct ev_timer *w)
408	{	722	{
		723	ev_clear ((W)w);
409	if (!ev_is_active (w))	724	if (!ev_is_active (w))
410	return;	725	return;
411		726
412	if (w->active < timercnt--)	727	if (w->active < timercnt--)
413	{	728	{
414	timers [w->active - 1] = timers [timercnt];	729	timers [w->active - 1] = timers [timercnt];
415	downheap (w->active - 1);	730	downheap ((WT *)timers, timercnt, w->active - 1);
		731	}
		732
		733	w->at = w->repeat;
		734
		735	ev_stop ((W)w);
		736	}
		737
		738	void
		739	evtimer_again (struct ev_timer *w)
		740	{
		741	if (ev_is_active (w))
416	}	742	{
		743	if (w->repeat)
		744	{
		745	w->at = now + w->repeat;
		746	downheap ((WT *)timers, timercnt, w->active - 1);
		747	}
		748	else
		749	evtimer_stop (w);
		750	}
		751	else if (w->repeat)
		752	evtimer_start (w);
		753	}
417		754
418	ev_stop ((struct ev_watcher *)w);	755	void
		756	evperiodic_start (struct ev_periodic *w)
		757	{
		758	if (ev_is_active (w))
		759	return;
		760
		761	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
		762
		763	/* this formula differs from the one in periodic_reify because we do not always round up */
		764	if (w->interval)
		765	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
		766
		767	ev_start ((W)w, ++periodiccnt);
		768	array_needsize (periodics, periodicmax, periodiccnt, );
		769	periodics [periodiccnt - 1] = w;
		770	upheap ((WT *)periodics, periodiccnt - 1);
		771	}
		772
		773	void
		774	evperiodic_stop (struct ev_periodic *w)
		775	{
		776	ev_clear ((W)w);
		777	if (!ev_is_active (w))
		778	return;
		779
		780	if (w->active < periodiccnt--)
		781	{
		782	periodics [w->active - 1] = periodics [periodiccnt];
		783	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		784	}
		785
		786	ev_stop ((W)w);
419	}	787	}
420		788
421	void	789	void
422	evsignal_start (struct ev_signal *w)	790	evsignal_start (struct ev_signal *w)
423	{	791	{
424	if (ev_is_active (w))	792	if (ev_is_active (w))
425	return;	793	return;
426		794
427	ev_start ((struct ev_watcher *)w, 1);	795	ev_start ((W)w, 1);
428	array_needsize (signals, signalmax, w->signum, signals_init);	796	array_needsize (signals, signalmax, w->signum, signals_init);
429	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	797	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		798
		799	if (!w->next)
		800	{
		801	struct sigaction sa;
		802	sa.sa_handler = sighandler;
		803	sigfillset (&sa.sa_mask);
		804	sa.sa_flags = 0;
		805	sigaction (w->signum, &sa, 0);
		806	}
430	}	807	}
431		808
432	void	809	void
433	evsignal_stop (struct ev_signal *w)	810	evsignal_stop (struct ev_signal *w)
434	{	811	{
		812	ev_clear ((W)w);
435	if (!ev_is_active (w))	813	if (!ev_is_active (w))
436	return;	814	return;
437		815
438	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	816	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
439	ev_stop ((struct ev_watcher *)w);	817	ev_stop ((W)w);
440	}
441		818
		819	if (!signals [w->signum - 1].head)
		820	signal (w->signum, SIG_DFL);
		821	}
		822
		823	void evidle_start (struct ev_idle *w)
		824	{
		825	if (ev_is_active (w))
		826	return;
		827
		828	ev_start ((W)w, ++idlecnt);
		829	array_needsize (idles, idlemax, idlecnt, );
		830	idles [idlecnt - 1] = w;
		831	}
		832
		833	void evidle_stop (struct ev_idle *w)
		834	{
		835	ev_clear ((W)w);
		836	if (ev_is_active (w))
		837	return;
		838
		839	idles [w->active - 1] = idles [--idlecnt];
		840	ev_stop ((W)w);
		841	}
		842
		843	void evprepare_start (struct ev_prepare *w)
		844	{
		845	if (ev_is_active (w))
		846	return;
		847
		848	ev_start ((W)w, ++preparecnt);
		849	array_needsize (prepares, preparemax, preparecnt, );
		850	prepares [preparecnt - 1] = w;
		851	}
		852
		853	void evprepare_stop (struct ev_prepare *w)
		854	{
		855	ev_clear ((W)w);
		856	if (ev_is_active (w))
		857	return;
		858
		859	prepares [w->active - 1] = prepares [--preparecnt];
		860	ev_stop ((W)w);
		861	}
		862
		863	void evcheck_start (struct ev_check *w)
		864	{
		865	if (ev_is_active (w))
		866	return;
		867
		868	ev_start ((W)w, ++checkcnt);
		869	array_needsize (checks, checkmax, checkcnt, );
		870	checks [checkcnt - 1] = w;
		871	}
		872
		873	void evcheck_stop (struct ev_check *w)
		874	{
		875	ev_clear ((W)w);
		876	if (ev_is_active (w))
		877	return;
		878
		879	checks [w->active - 1] = checks [--checkcnt];
		880	ev_stop ((W)w);
		881	}
		882
442	/*****************************************************************************/	883	/*****************************************************************************/
		884
		885	struct ev_once
		886	{
		887	struct ev_io io;
		888	struct ev_timer to;
		889	void (cb)(int revents, void arg);
		890	void *arg;
		891	};
		892
		893	static void
		894	once_cb (struct ev_once *once, int revents)
		895	{
		896	void (cb)(int revents, void arg) = once->cb;
		897	void *arg = once->arg;
		898
		899	evio_stop (&once->io);
		900	evtimer_stop (&once->to);
		901	free (once);
		902
		903	cb (revents, arg);
		904	}
		905
		906	static void
		907	once_cb_io (struct ev_io *w, int revents)
		908	{
		909	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		910	}
		911
		912	static void
		913	once_cb_to (struct ev_timer *w, int revents)
		914	{
		915	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		916	}
		917
		918	void
		919	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		920	{
		921	struct ev_once *once = malloc (sizeof (struct ev_once));
		922
		923	if (!once)
		924	cb (EV_ERROR, arg);
		925	else
		926	{
		927	once->cb = cb;
		928	once->arg = arg;
		929
		930	evw_init (&once->io, once_cb_io);
		931
		932	if (fd >= 0)
		933	{
		934	evio_set (&once->io, fd, events);
		935	evio_start (&once->io);
		936	}
		937
		938	evw_init (&once->to, once_cb_to);
		939
		940	if (timeout >= 0.)
		941	{
		942	evtimer_set (&once->to, timeout, 0.);
		943	evtimer_start (&once->to);
		944	}
		945	}
		946	}
		947
		948	/*****************************************************************************/
		949
443	#if 1	950	#if 0
		951
		952	struct ev_io wio;
444		953
445	static void	954	static void
446	sin_cb (struct ev_io *w, int revents)	955	sin_cb (struct ev_io *w, int revents)
447	{	956	{
448	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	957	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
449	}	958	}
450		959
451	static void	960	static void
452	ocb (struct ev_timer *w, int revents)	961	ocb (struct ev_timer *w, int revents)
453	{	962	{
454	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	963	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
		964	evtimer_stop (w);
		965	evtimer_start (w);
		966	}
		967
		968	static void
		969	scb (struct ev_signal *w, int revents)
		970	{
		971	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		972	evio_stop (&wio);
		973	evio_start (&wio);
		974	}
		975
		976	static void
		977	gcb (struct ev_signal *w, int revents)
		978	{
		979	fprintf (stderr, "generic %x\n", revents);
		980
455	}	981	}
456		982
457	int main (void)	983	int main (void)
458	{	984	{
459	struct ev_io sin;
460
461	ev_init (0);	985	ev_init (0);
462		986
463	evw_init (&sin, sin_cb, 55);
464	evio_set (&sin, 0, EV_READ);	987	evio_init (&wio, sin_cb, 0, EV_READ);
465	evio_start (&sin);	988	evio_start (&wio);
466		989
467	struct ev_timer t[1000];	990	struct ev_timer t[10000];
468		991
		992	#if 0
469	int i;	993	int i;
470	for (i = 0; i < 1000; ++i)	994	for (i = 0; i < 10000; ++i)
471	{	995	{
472	struct ev_timer *w = t + i;	996	struct ev_timer *w = t + i;
473	evw_init (w, ocb, i);	997	evw_init (w, ocb, i);
474	evtimer_set_rel (w, drand48 (), 0);	998	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
475	evtimer_start (w);	999	evtimer_start (w);
476	if (drand48 () < 0.5)	1000	if (drand48 () < 0.5)
477	evtimer_stop (w);	1001	evtimer_stop (w);
478	}	1002	}
		1003	#endif
		1004
		1005	struct ev_timer t1;
		1006	evtimer_init (&t1, ocb, 5, 10);
		1007	evtimer_start (&t1);
		1008
		1009	struct ev_signal sig;
		1010	evsignal_init (&sig, scb, SIGQUIT);
		1011	evsignal_start (&sig);
		1012
		1013	struct ev_check cw;
		1014	evcheck_init (&cw, gcb);
		1015	evcheck_start (&cw);
		1016
		1017	struct ev_idle iw;
		1018	evidle_init (&iw, gcb);
		1019	evidle_start (&iw);
479		1020
480	ev_loop (0);	1021	ev_loop (0);
481		1022
482	return 0;	1023	return 0;
483	}	1024	}

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Comparing libev/ev.c (file contents): Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs. Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs.
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC