[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 1.23 by root, Wed Oct 31 20:10:17 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>
		41	#include <sys/types.h>
		42	#include <sys/wait.h>
7	#include <sys/time.h>	43	#include <sys/time.h>
8	#include <time.h>	44	#include <time.h>
9		45
		46	#ifndef HAVE_MONOTONIC
10	#ifdef CLOCK_MONOTONIC	47	# ifdef CLOCK_MONOTONIC
11	# define HAVE_MONOTONIC 1	48	# define HAVE_MONOTONIC 1
12	#endif	49	# endif
		50	#endif
13		51
14	#define HAVE_EPOLL 1	52	#ifndef HAVE_SELECT
15	#define HAVE_REALTIME 1
16	#define HAVE_SELECT 0	53	# define HAVE_SELECT 1
		54	#endif
17		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
		63
		64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
18	#define MAX_BLOCKTIME 60.	65	#define MAX_BLOCKTIME 60.
		66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */
19		67
20	#include "ev.h"	68	#include "ev.h"
21		69
22	struct ev_watcher {	70	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);
24	};
25
26	struct ev_watcher_list {	71	typedef struct ev_watcher_list *WL;
27	EV_WATCHER_LIST (ev_watcher_list);	72	typedef struct ev_watcher_time *WT;
28	};
29		73
		74	static ev_tstamp now, diff; /* monotonic clock */
30	ev_tstamp ev_now;	75	ev_tstamp ev_now;
31	int ev_method;	76	int ev_method;
32		77
33	static int have_monotonic; /* runtime */	78	static int have_monotonic; /* runtime */
34		79
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
36	static void (*method_reify)(void);	81	static void (*method_modify)(int fd, int oev, int nev);
37	static void (*method_poll)(ev_tstamp timeout);	82	static void (*method_poll)(ev_tstamp timeout);
		83
		84	/*****************************************************************************/
38		85
39	ev_tstamp	86	ev_tstamp
40	ev_time (void)	87	ev_time (void)
41	{	88	{
42	#if HAVE_REALTIME	89	#if HAVE_REALTIME
66	}	113	}
67		114
68	#define array_needsize(base,cur,cnt,init) \	115	#define array_needsize(base,cur,cnt,init) \
69	if ((cnt) > cur) \	116	if ((cnt) > cur) \
70	{ \	117	{ \
71	int newcnt = cur ? cur << 1 : 16; \	118	int newcnt = cur; \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	119	do \
		120	{ \
		121	newcnt = (newcnt << 1) \| 4 & ~3; \
		122	} \
		123	while ((cnt) > newcnt); \
		124	\
73	base = realloc (base, sizeof (base) (newcnt)); \	125	base = realloc (base, sizeof (base) (newcnt)); \
74	init (base + cur, newcnt - cur); \	126	init (base + cur, newcnt - cur); \
75	cur = newcnt; \	127	cur = newcnt; \
76	}	128	}
77		129
		130	/*****************************************************************************/
		131
78	typedef struct	132	typedef struct
79	{	133	{
80	struct ev_io *head;	134	struct ev_io *head;
81	unsigned char wev, rev; /* want, received event set */	135	unsigned char wev, rev; /* want, received event set */
82	} ANFD;	136	} ANFD;
…		…
98	}	152	}
99	}	153	}
100		154
101	typedef struct	155	typedef struct
102	{	156	{
103	struct ev_watcher *w;	157	W w;
104	int events;	158	int events;
105	} ANPENDING;	159	} ANPENDING;
106		160
107	static ANPENDING *pendings;	161	static ANPENDING *pendings;
108	static int pendingmax, pendingcnt;	162	static int pendingmax, pendingcnt;
109		163
110	static void	164	static void
111	event (struct ev_watcher *w, int events)	165	event (W w, int events)
112	{	166	{
		167	if (w->active)
		168	{
113	w->pending = ++pendingcnt;	169	w->pending = ++pendingcnt;
114	array_needsize (pendings, pendingmax, pendingcnt, );	170	array_needsize (pendings, pendingmax, pendingcnt, );
115	pendings [pendingcnt - 1].w = w;	171	pendings [pendingcnt - 1].w = w;
116	pendings [pendingcnt - 1].events = events;	172	pendings [pendingcnt - 1].events = events;
		173	}
117	}	174	}
118		175
119	static void	176	static void
120	fd_event (int fd, int events)	177	fd_event (int fd, int events)
121	{	178	{
…		…
125	for (w = anfd->head; w; w = w->next)	182	for (w = anfd->head; w; w = w->next)
126	{	183	{
127	int ev = w->events & events;	184	int ev = w->events & events;
128		185
129	if (ev)	186	if (ev)
130	event ((struct ev_watcher *)w, ev);	187	event ((W)w, ev);
131	}	188	}
132	}	189	}
		190
		191	static void
		192	queue_events (W *events, int eventcnt, int type)
		193	{
		194	int i;
		195
		196	for (i = 0; i < eventcnt; ++i)
		197	event (events [i], type);
		198	}
		199
		200	/* called on EBADF to verify fds */
		201	static void
		202	fd_recheck ()
		203	{
		204	int fd;
		205
		206	for (fd = 0; fd < anfdmax; ++fd)
		207	if (anfds [fd].wev)
		208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		209	while (anfds [fd].head)
		210	evio_stop (anfds [fd].head);
		211	}
		212
		213	/*****************************************************************************/
133		214
134	static struct ev_timer **timers;	215	static struct ev_timer **timers;
135	static int timermax, timercnt;	216	static int timermax, timercnt;
136		217
		218	static struct ev_periodic **periodics;
		219	static int periodicmax, periodiccnt;
		220
137	static void	221	static void
138	upheap (int k)	222	upheap (WT *timers, int k)
139	{	223	{
140	struct ev_timer *w = timers [k];	224	WT w = timers [k];
141		225
142	while (k && timers [k >> 1]->at > w->at)	226	while (k && timers [k >> 1]->at > w->at)
143	{	227	{
144	timers [k] = timers [k >> 1];	228	timers [k] = timers [k >> 1];
145	timers [k]->active = k + 1;	229	timers [k]->active = k + 1;
…		…
150	timers [k]->active = k + 1;	234	timers [k]->active = k + 1;
151		235
152	}	236	}
153		237
154	static void	238	static void
155	downheap (int k)	239	downheap (WT *timers, int N, int k)
156	{	240	{
157	struct ev_timer *w = timers [k];	241	WT w = timers [k];
158		242
159	while (k < (timercnt >> 1))	243	while (k < (N >> 1))
160	{	244	{
161	int j = k << 1;	245	int j = k << 1;
162		246
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	247	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
164	++j;	248	++j;
165		249
166	if (w->at <= timers [j]->at)	250	if (w->at <= timers [j]->at)
167	break;	251	break;
168		252
…		…
173		257
174	timers [k] = w;	258	timers [k] = w;
175	timers [k]->active = k + 1;	259	timers [k]->active = k + 1;
176	}	260	}
177		261
178	static struct ev_signal **signals;	262	/*****************************************************************************/
		263
		264	typedef struct
		265	{
		266	struct ev_signal *head;
		267	sig_atomic_t gotsig;
		268	} ANSIG;
		269
		270	static ANSIG *signals;
179	static int signalmax, signalcnt;	271	static int signalmax;
180		272
		273	static int sigpipe [2];
		274	static sig_atomic_t gotsig;
		275	static struct ev_io sigev;
		276
181	static void	277	static void
182	signals_init (struct ev_signal **base, int count)	278	signals_init (ANSIG *base, int count)
183	{	279	{
184	while (count--)	280	while (count--)
185	*base++ = 0;	281	{
		282	base->head = 0;
		283	base->gotsig = 0;
		284	++base;
		285	}
186	}	286	}
		287
		288	static void
		289	sighandler (int signum)
		290	{
		291	signals [signum - 1].gotsig = 1;
		292
		293	if (!gotsig)
		294	{
		295	gotsig = 1;
		296	write (sigpipe [1], &gotsig, 1);
		297	}
		298	}
		299
		300	static void
		301	sigcb (struct ev_io *iow, int revents)
		302	{
		303	struct ev_signal *w;
		304	int sig;
		305
		306	gotsig = 0;
		307	read (sigpipe [0], &revents, 1);
		308
		309	for (sig = signalmax; sig--; )
		310	if (signals [sig].gotsig)
		311	{
		312	signals [sig].gotsig = 0;
		313
		314	for (w = signals [sig].head; w; w = w->next)
		315	event ((W)w, EV_SIGNAL);
		316	}
		317	}
		318
		319	static void
		320	siginit (void)
		321	{
		322	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		323	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		324
		325	/* rather than sort out wether we really need nb, set it */
		326	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		327	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		328
		329	evio_set (&sigev, sigpipe [0], EV_READ);
		330	evio_start (&sigev);
		331	}
		332
		333	/*****************************************************************************/
		334
		335	static struct ev_idle **idles;
		336	static int idlemax, idlecnt;
		337
		338	static struct ev_prepare **prepares;
		339	static int preparemax, preparecnt;
		340
		341	static struct ev_check **checks;
		342	static int checkmax, checkcnt;
		343
		344	/*****************************************************************************/
		345
		346	static struct ev_child *childs [PID_HASHSIZE];
		347	static struct ev_signal childev;
		348
		349	#ifndef WCONTINUED
		350	# define WCONTINUED 0
		351	#endif
		352
		353	static void
		354	childcb (struct ev_signal *sw, int revents)
		355	{
		356	struct ev_child *w;
		357	int pid, status;
		358
		359	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)
		360	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
		361	if (w->pid == pid \|\| w->pid == -1)
		362	{
		363	w->status = status;
		364	event ((W)w, EV_CHILD);
		365	}
		366	}
		367
		368	/*****************************************************************************/
187		369
188	#if HAVE_EPOLL	370	#if HAVE_EPOLL
189	# include "ev_epoll.c"	371	# include "ev_epoll.c"
190	#endif	372	#endif
191	#if HAVE_SELECT	373	#if HAVE_SELECT
192	# include "ev_select.c"	374	# include "ev_select.c"
193	#endif	375	#endif
194		376
195	int ev_init (int flags)	377	int ev_init (int flags)
196	{	378	{
		379	if (!ev_method)
		380	{
197	#if HAVE_MONOTONIC	381	#if HAVE_MONOTONIC
198	{	382	{
199	struct timespec ts;	383	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	384	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	385	have_monotonic = 1;
202	}	386	}
203	#endif	387	#endif
204		388
205	ev_now = ev_time ();	389	ev_now = ev_time ();
		390	now = get_clock ();
		391	diff = ev_now - now;
206		392
		393	if (pipe (sigpipe))
		394	return 0;
		395
		396	ev_method = EVMETHOD_NONE;
207	#if HAVE_EPOLL	397	#if HAVE_EPOLL
208	if (epoll_init (flags))	398	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
209	return ev_method;
210	#endif	399	#endif
211	#if HAVE_SELECT	400	#if HAVE_SELECT
212	if (select_init (flags))	401	if (ev_method == EVMETHOD_NONE) select_init (flags);
213	return ev_method;
214	#endif	402	#endif
215		403
216	ev_method = EVMETHOD_NONE;	404	if (ev_method)
		405	{
		406	evw_init (&sigev, sigcb);
		407	siginit ();
		408
		409	evsignal_init (&childev, childcb, SIGCHLD);
		410	evsignal_start (&childev);
		411	}
		412	}
		413
217	return ev_method;	414	return ev_method;
218	}	415	}
219		416
		417	/*****************************************************************************/
		418
220	void ev_prefork (void)	419	void ev_prefork (void)
221	{	420	{
		421	/* nop */
222	}	422	}
223		423
224	void ev_postfork_parent (void)	424	void ev_postfork_parent (void)
225	{	425	{
		426	/* nop */
226	}	427	}
227		428
228	void ev_postfork_child (void)	429	void ev_postfork_child (void)
229	{	430	{
230	#if HAVE_EPOLL	431	#if HAVE_EPOLL
		432	if (ev_method == EVMETHOD_EPOLL)
231	epoll_postfork_child ();	433	epoll_postfork_child ();
232	#endif	434	#endif
		435
		436	evio_stop (&sigev);
		437	close (sigpipe [0]);
		438	close (sigpipe [1]);
		439	pipe (sigpipe);
		440	siginit ();
		441	}
		442
		443	/*****************************************************************************/
		444
		445	static void
		446	fd_reify (void)
		447	{
		448	int i;
		449
		450	for (i = 0; i < fdchangecnt; ++i)
		451	{
		452	int fd = fdchanges [i];
		453	ANFD *anfd = anfds + fd;
		454	struct ev_io *w;
		455
		456	int wev = 0;
		457
		458	for (w = anfd->head; w; w = w->next)
		459	wev \|= w->events;
		460
		461	if (anfd->wev != wev)
		462	{
		463	method_modify (fd, anfd->wev, wev);
		464	anfd->wev = wev;
		465	}
		466	}
		467
		468	fdchangecnt = 0;
233	}	469	}
234		470
235	static void	471	static void
236	call_pending ()	472	call_pending ()
237	{	473	{
238	int i;	474	while (pendingcnt)
239
240	for (i = 0; i < pendingcnt; ++i)
241	{	475	{
242	ANPENDING *p = pendings + i;	476	ANPENDING *p = pendings + --pendingcnt;
243		477
244	if (p->w)	478	if (p->w)
245	{	479	{
246	p->w->pending = 0;	480	p->w->pending = 0;
247	p->w->cb (p->w, p->events);	481	p->w->cb (p->w, p->events);
248	}	482	}
249	}	483	}
250
251	pendingcnt = 0;
252	}	484	}
253		485
254	static void	486	static void
255	timer_reify (void)	487	timers_reify ()
256	{	488	{
257	while (timercnt && timers [0]->at <= ev_now)	489	while (timercnt && timers [0]->at <= now)
258	{	490	{
259	struct ev_timer *w = timers [0];	491	struct ev_timer *w = timers [0];
260		492
		493	event ((W)w, EV_TIMEOUT);
		494
261	/* first reschedule timer */	495	/* first reschedule or stop timer */
262	if (w->repeat)	496	if (w->repeat)
263	{	497	{
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;	498	w->at = now + w->repeat;
268		499	assert (("timer timeout in the past, negative repeat?", w->at > now));
269	downheap (0);	500	downheap ((WT *)timers, timercnt, 0);
270	}	501	}
271	else	502	else
272	evtimer_stop (w); /* nonrepeating: stop timer */	503	evtimer_stop (w); /* nonrepeating: stop timer */
		504	}
		505	}
273		506
		507	static void
		508	periodics_reify ()
		509	{
		510	while (periodiccnt && periodics [0]->at <= ev_now)
		511	{
		512	struct ev_periodic *w = periodics [0];
		513
		514	/* first reschedule or stop timer */
		515	if (w->interval)
		516	{
		517	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		518	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));
		519	downheap ((WT *)periodics, periodiccnt, 0);
		520	}
		521	else
		522	evperiodic_stop (w); /* nonrepeating: stop timer */
		523
274	event ((struct ev_watcher *)w, EV_TIMEOUT);	524	event ((W)w, EV_TIMEOUT);
		525	}
		526	}
		527
		528	static void
		529	periodics_reschedule (ev_tstamp diff)
		530	{
		531	int i;
		532
		533	/* adjust periodics after time jump */
		534	for (i = 0; i < periodiccnt; ++i)
		535	{
		536	struct ev_periodic *w = periodics [i];
		537
		538	if (w->interval)
		539	{
		540	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		541
		542	if (fabs (diff) >= 1e-4)
		543	{
		544	evperiodic_stop (w);
		545	evperiodic_start (w);
		546
		547	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		548	}
		549	}
		550	}
		551	}
		552
		553	static void
		554	time_update ()
		555	{
		556	int i;
		557
		558	ev_now = ev_time ();
		559
		560	if (have_monotonic)
		561	{
		562	ev_tstamp odiff = diff;
		563
		564	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		565	{
		566	now = get_clock ();
		567	diff = ev_now - now;
		568
		569	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		570	return; /* all is well */
		571
		572	ev_now = ev_time ();
		573	}
		574
		575	periodics_reschedule (diff - odiff);
		576	/* no timer adjustment, as the monotonic clock doesn't jump */
		577	}
		578	else
		579	{
		580	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
		581	{
		582	periodics_reschedule (ev_now - now);
		583
		584	/* adjust timers. this is easy, as the offset is the same for all */
		585	for (i = 0; i < timercnt; ++i)
		586	timers [i]->at += diff;
		587	}
		588
		589	now = ev_now;
275	}	590	}
276	}	591	}
277		592
278	int ev_loop_done;	593	int ev_loop_done;
279		594
280	int ev_loop (int flags)	595	void ev_loop (int flags)
281	{	596	{
282	double block;	597	double block;
283	ev_loop_done = flags & EVLOOP_ONESHOT;	598	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
284		599
285	do	600	do
286	{	601	{
		602	/* queue check watchers (and execute them) */
		603	if (preparecnt)
		604	{
		605	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		606	call_pending ();
		607	}
		608
287	/* update fd-related kernel structures */	609	/* update fd-related kernel structures */
288	method_reify (); fdchangecnt = 0;	610	fd_reify ();
289		611
290	/* calculate blocking time */	612	/* calculate blocking time */
		613
		614	/* we only need this for !monotonic clockor timers, but as we basically
		615	always have timers, we just calculate it always */
291	ev_now = ev_time ();	616	ev_now = ev_time ();
292		617
293	if (flags & EVLOOP_NONBLOCK)	618	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
294	block = 0.;	619	block = 0.;
295	else if (!timercnt)
296	block = MAX_BLOCKTIME;
297	else	620	else
298	{	621	{
		622	block = MAX_BLOCKTIME;
		623
		624	if (timercnt)
		625	{
		626	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
		627	if (block > to) block = to;
		628	}
		629
		630	if (periodiccnt)
		631	{
299	block = timers [0]->at - ev_now + method_fudge;	632	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
		633	if (block > to) block = to;
		634	}
		635
300	if (block < 0.) block = 0.;	636	if (block < 0.) block = 0.;
301	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
302	}	637	}
303		638
304	method_poll (block);	639	method_poll (block);
305		640
		641	/* update ev_now, do magic */
		642	time_update ();
		643
306	/* put pending timers into pendign queue and reschedule them */	644	/* queue pending timers and reschedule them */
307	timer_reify ();	645	timers_reify (); /* relative timers called last */
		646	periodics_reify (); /* absolute timers called first */
308		647
309	ev_now = ev_time ();	648	/* queue idle watchers unless io or timers are pending */
		649	if (!pendingcnt)
		650	queue_events ((W *)idles, idlecnt, EV_IDLE);
		651
		652	/* queue check watchers, to be executed first */
		653	if (checkcnt)
		654	queue_events ((W *)checks, checkcnt, EV_CHECK);
		655
310	call_pending ();	656	call_pending ();
311	}	657	}
312	while (!ev_loop_done);	658	while (!ev_loop_done);
313	}
314		659
		660	if (ev_loop_done != 2)
		661	ev_loop_done = 0;
		662	}
		663
		664	/*****************************************************************************/
		665
315	static void	666	static void
316	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	667	wlist_add (WL *head, WL elem)
317	{	668	{
318	elem->next = *head;	669	elem->next = *head;
319	*head = elem;	670	*head = elem;
320	}	671	}
321		672
322	static void	673	static void
323	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	674	wlist_del (WL *head, WL elem)
324	{	675	{
325	while (*head)	676	while (*head)
326	{	677	{
327	if (*head == elem)	678	if (*head == elem)
328	{	679	{
…		…
333	head = &(*head)->next;	684	head = &(*head)->next;
334	}	685	}
335	}	686	}
336		687
337	static void	688	static void
338	ev_start (struct ev_watcher *w, int active)	689	ev_clear (W w)
339	{	690	{
		691	if (w->pending)
		692	{
		693	pendings [w->pending - 1].w = 0;
340	w->pending = 0;	694	w->pending = 0;
		695	}
		696	}
		697
		698	static void
		699	ev_start (W w, int active)
		700	{
341	w->active = active;	701	w->active = active;
342	}	702	}
343		703
344	static void	704	static void
345	ev_stop (struct ev_watcher *w)	705	ev_stop (W w)
346	{	706	{
347	if (w->pending)
348	pendings [w->pending - 1].w = 0;
349
350	w->active = 0;	707	w->active = 0;
351	/* nop */
352	}	708	}
		709
		710	/*****************************************************************************/
353		711
354	void	712	void
355	evio_start (struct ev_io *w)	713	evio_start (struct ev_io *w)
356	{	714	{
357	if (ev_is_active (w))	715	if (ev_is_active (w))
358	return;	716	return;
359		717
360	int fd = w->fd;	718	int fd = w->fd;
361		719
362	ev_start ((struct ev_watcher *)w, 1);	720	ev_start ((W)w, 1);
363	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	721	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
364	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	722	wlist_add ((WL *)&anfds[fd].head, (WL)w);
365		723
366	++fdchangecnt;	724	++fdchangecnt;
367	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	725	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
368	fdchanges [fdchangecnt - 1] = fd;	726	fdchanges [fdchangecnt - 1] = fd;
369	}	727	}
370		728
371	void	729	void
372	evio_stop (struct ev_io *w)	730	evio_stop (struct ev_io *w)
373	{	731	{
		732	ev_clear ((W)w);
374	if (!ev_is_active (w))	733	if (!ev_is_active (w))
375	return;	734	return;
376		735
377	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	736	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
378	ev_stop ((struct ev_watcher *)w);	737	ev_stop ((W)w);
379		738
380	++fdchangecnt;	739	++fdchangecnt;
381	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	740	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
382	fdchanges [fdchangecnt - 1] = w->fd;	741	fdchanges [fdchangecnt - 1] = w->fd;
383	}	742	}
…		…
386	evtimer_start (struct ev_timer *w)	745	evtimer_start (struct ev_timer *w)
387	{	746	{
388	if (ev_is_active (w))	747	if (ev_is_active (w))
389	return;	748	return;
390		749
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;	750	w->at += now;
399		751
400	ev_start ((struct ev_watcher *)w, ++timercnt);	752	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
		753
		754	ev_start ((W)w, ++timercnt);
401	array_needsize (timers, timermax, timercnt, );	755	array_needsize (timers, timermax, timercnt, );
402	timers [timercnt - 1] = w;	756	timers [timercnt - 1] = w;
403	upheap (timercnt - 1);	757	upheap ((WT *)timers, timercnt - 1);
404	}	758	}
405		759
406	void	760	void
407	evtimer_stop (struct ev_timer *w)	761	evtimer_stop (struct ev_timer *w)
408	{	762	{
		763	ev_clear ((W)w);
409	if (!ev_is_active (w))	764	if (!ev_is_active (w))
410	return;	765	return;
411		766
412	if (w->active < timercnt--)	767	if (w->active < timercnt--)
413	{	768	{
414	timers [w->active - 1] = timers [timercnt];	769	timers [w->active - 1] = timers [timercnt];
415	downheap (w->active - 1);	770	downheap ((WT *)timers, timercnt, w->active - 1);
		771	}
		772
		773	w->at = w->repeat;
		774
		775	ev_stop ((W)w);
		776	}
		777
		778	void
		779	evtimer_again (struct ev_timer *w)
		780	{
		781	if (ev_is_active (w))
416	}	782	{
		783	if (w->repeat)
		784	{
		785	w->at = now + w->repeat;
		786	downheap ((WT *)timers, timercnt, w->active - 1);
		787	}
		788	else
		789	evtimer_stop (w);
		790	}
		791	else if (w->repeat)
		792	evtimer_start (w);
		793	}
417		794
418	ev_stop ((struct ev_watcher *)w);	795	void
		796	evperiodic_start (struct ev_periodic *w)
		797	{
		798	if (ev_is_active (w))
		799	return;
		800
		801	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
		802
		803	/* this formula differs from the one in periodic_reify because we do not always round up */
		804	if (w->interval)
		805	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
		806
		807	ev_start ((W)w, ++periodiccnt);
		808	array_needsize (periodics, periodicmax, periodiccnt, );
		809	periodics [periodiccnt - 1] = w;
		810	upheap ((WT *)periodics, periodiccnt - 1);
		811	}
		812
		813	void
		814	evperiodic_stop (struct ev_periodic *w)
		815	{
		816	ev_clear ((W)w);
		817	if (!ev_is_active (w))
		818	return;
		819
		820	if (w->active < periodiccnt--)
		821	{
		822	periodics [w->active - 1] = periodics [periodiccnt];
		823	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		824	}
		825
		826	ev_stop ((W)w);
419	}	827	}
420		828
421	void	829	void
422	evsignal_start (struct ev_signal *w)	830	evsignal_start (struct ev_signal *w)
423	{	831	{
424	if (ev_is_active (w))	832	if (ev_is_active (w))
425	return;	833	return;
426		834
427	ev_start ((struct ev_watcher *)w, 1);	835	ev_start ((W)w, 1);
428	array_needsize (signals, signalmax, w->signum, signals_init);	836	array_needsize (signals, signalmax, w->signum, signals_init);
429	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	837	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		838
		839	if (!w->next)
		840	{
		841	struct sigaction sa;
		842	sa.sa_handler = sighandler;
		843	sigfillset (&sa.sa_mask);
		844	sa.sa_flags = 0;
		845	sigaction (w->signum, &sa, 0);
		846	}
430	}	847	}
431		848
432	void	849	void
433	evsignal_stop (struct ev_signal *w)	850	evsignal_stop (struct ev_signal *w)
434	{	851	{
		852	ev_clear ((W)w);
435	if (!ev_is_active (w))	853	if (!ev_is_active (w))
436	return;	854	return;
437		855
438	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	856	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
439	ev_stop ((struct ev_watcher *)w);	857	ev_stop ((W)w);
440	}
441		858
		859	if (!signals [w->signum - 1].head)
		860	signal (w->signum, SIG_DFL);
		861	}
		862
		863	void evidle_start (struct ev_idle *w)
		864	{
		865	if (ev_is_active (w))
		866	return;
		867
		868	ev_start ((W)w, ++idlecnt);
		869	array_needsize (idles, idlemax, idlecnt, );
		870	idles [idlecnt - 1] = w;
		871	}
		872
		873	void evidle_stop (struct ev_idle *w)
		874	{
		875	ev_clear ((W)w);
		876	if (ev_is_active (w))
		877	return;
		878
		879	idles [w->active - 1] = idles [--idlecnt];
		880	ev_stop ((W)w);
		881	}
		882
		883	void evprepare_start (struct ev_prepare *w)
		884	{
		885	if (ev_is_active (w))
		886	return;
		887
		888	ev_start ((W)w, ++preparecnt);
		889	array_needsize (prepares, preparemax, preparecnt, );
		890	prepares [preparecnt - 1] = w;
		891	}
		892
		893	void evprepare_stop (struct ev_prepare *w)
		894	{
		895	ev_clear ((W)w);
		896	if (ev_is_active (w))
		897	return;
		898
		899	prepares [w->active - 1] = prepares [--preparecnt];
		900	ev_stop ((W)w);
		901	}
		902
		903	void evcheck_start (struct ev_check *w)
		904	{
		905	if (ev_is_active (w))
		906	return;
		907
		908	ev_start ((W)w, ++checkcnt);
		909	array_needsize (checks, checkmax, checkcnt, );
		910	checks [checkcnt - 1] = w;
		911	}
		912
		913	void evcheck_stop (struct ev_check *w)
		914	{
		915	ev_clear ((W)w);
		916	if (ev_is_active (w))
		917	return;
		918
		919	checks [w->active - 1] = checks [--checkcnt];
		920	ev_stop ((W)w);
		921	}
		922
		923	void evchild_start (struct ev_child *w)
		924	{
		925	if (ev_is_active (w))
		926	return;
		927
		928	ev_start ((W)w, 1);
		929	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		930	}
		931
		932	void evchild_stop (struct ev_child *w)
		933	{
		934	ev_clear ((W)w);
		935	if (ev_is_active (w))
		936	return;
		937
		938	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		939	ev_stop ((W)w);
		940	}
		941
442	/*****************************************************************************/	942	/*****************************************************************************/
		943
		944	struct ev_once
		945	{
		946	struct ev_io io;
		947	struct ev_timer to;
		948	void (cb)(int revents, void arg);
		949	void *arg;
		950	};
		951
		952	static void
		953	once_cb (struct ev_once *once, int revents)
		954	{
		955	void (cb)(int revents, void arg) = once->cb;
		956	void *arg = once->arg;
		957
		958	evio_stop (&once->io);
		959	evtimer_stop (&once->to);
		960	free (once);
		961
		962	cb (revents, arg);
		963	}
		964
		965	static void
		966	once_cb_io (struct ev_io *w, int revents)
		967	{
		968	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		969	}
		970
		971	static void
		972	once_cb_to (struct ev_timer *w, int revents)
		973	{
		974	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		975	}
		976
		977	void
		978	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		979	{
		980	struct ev_once *once = malloc (sizeof (struct ev_once));
		981
		982	if (!once)
		983	cb (EV_ERROR, arg);
		984	else
		985	{
		986	once->cb = cb;
		987	once->arg = arg;
		988
		989	evw_init (&once->io, once_cb_io);
		990
		991	if (fd >= 0)
		992	{
		993	evio_set (&once->io, fd, events);
		994	evio_start (&once->io);
		995	}
		996
		997	evw_init (&once->to, once_cb_to);
		998
		999	if (timeout >= 0.)
		1000	{
		1001	evtimer_set (&once->to, timeout, 0.);
		1002	evtimer_start (&once->to);
		1003	}
		1004	}
		1005	}
		1006
		1007	/*****************************************************************************/
		1008
443	#if 1	1009	#if 0
		1010
		1011	struct ev_io wio;
444		1012
445	static void	1013	static void
446	sin_cb (struct ev_io *w, int revents)	1014	sin_cb (struct ev_io *w, int revents)
447	{	1015	{
448	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1016	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
449	}	1017	}
450		1018
451	static void	1019	static void
452	ocb (struct ev_timer *w, int revents)	1020	ocb (struct ev_timer *w, int revents)
453	{	1021	{
454	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1022	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
		1023	evtimer_stop (w);
		1024	evtimer_start (w);
		1025	}
		1026
		1027	static void
		1028	scb (struct ev_signal *w, int revents)
		1029	{
		1030	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1031	evio_stop (&wio);
		1032	evio_start (&wio);
		1033	}
		1034
		1035	static void
		1036	gcb (struct ev_signal *w, int revents)
		1037	{
		1038	fprintf (stderr, "generic %x\n", revents);
		1039
455	}	1040	}
456		1041
457	int main (void)	1042	int main (void)
458	{	1043	{
459	struct ev_io sin;
460
461	ev_init (0);	1044	ev_init (0);
462		1045
463	evw_init (&sin, sin_cb, 55);
464	evio_set (&sin, 0, EV_READ);	1046	evio_init (&wio, sin_cb, 0, EV_READ);
465	evio_start (&sin);	1047	evio_start (&wio);
466		1048
467	struct ev_timer t[1000];	1049	struct ev_timer t[10000];
468		1050
		1051	#if 0
469	int i;	1052	int i;
470	for (i = 0; i < 1000; ++i)	1053	for (i = 0; i < 10000; ++i)
471	{	1054	{
472	struct ev_timer *w = t + i;	1055	struct ev_timer *w = t + i;
473	evw_init (w, ocb, i);	1056	evw_init (w, ocb, i);
474	evtimer_set_rel (w, drand48 (), 0);	1057	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
475	evtimer_start (w);	1058	evtimer_start (w);
476	if (drand48 () < 0.5)	1059	if (drand48 () < 0.5)
477	evtimer_stop (w);	1060	evtimer_stop (w);
478	}	1061	}
		1062	#endif
		1063
		1064	struct ev_timer t1;
		1065	evtimer_init (&t1, ocb, 5, 10);
		1066	evtimer_start (&t1);
		1067
		1068	struct ev_signal sig;
		1069	evsignal_init (&sig, scb, SIGQUIT);
		1070	evsignal_start (&sig);
		1071
		1072	struct ev_check cw;
		1073	evcheck_init (&cw, gcb);
		1074	evcheck_start (&cw);
		1075
		1076	struct ev_idle iw;
		1077	evidle_init (&iw, gcb);
		1078	evidle_start (&iw);
479		1079
480	ev_loop (0);	1080	ev_loop (0);
481		1081
482	return 0;	1082	return 0;
483	}	1083	}

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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 1.23 by root, Wed Oct 31 20:10:17 2007 UTC

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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 1.23 by root, Wed Oct 31 20:10:17 2007 UTC