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

Comparing libev/ev.c (file contents):
Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs.
Revision 1.48 by root, Sat Nov 3 12:19:31 2007 UTC

…		…
		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31	#if EV_USE_CONFIG_H
		32	# include "config.h"
		33	#endif
		34
1	#include <math.h>	35	#include <math.h>
2	#include <stdlib.h>	36	#include <stdlib.h>
3	#include <unistd.h>	37	#include <unistd.h>
4	#include <fcntl.h>	38	#include <fcntl.h>
5	#include <signal.h>	39	#include <signal.h>
		40	#include <stddef.h>
6		41
7	#include <stdio.h>	42	#include <stdio.h>
8		43
9	#include <assert.h>	44	#include <assert.h>
10	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
11	#include <sys/time.h>	50	#include <sys/time.h>
12	#include <time.h>	51	#include <time.h>
13		52
		53	/**/
		54
14	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USE_POLL
		64	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
15	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
16	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
17	# endif	84	#endif
18	#endif
19		85
20	#ifndef HAVE_SELECT
21	# define HAVE_SELECT 1
22	#endif
23
24	#ifndef HAVE_EPOLL
25	# define HAVE_EPOLL 0
26	#endif
27
28	#ifndef HAVE_REALTIME	86	#ifndef CLOCK_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
30	#endif	89	#endif
		90
		91	/**/
31		92
32	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
33	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
34		97
35	#include "ev.h"	98	#include "ev.h"
36		99
37	struct ev_watcher {	100	#if __GNUC__ >= 3
38	EV_WATCHER (ev_watcher);	101	# define expect(expr,value) __builtin_expect ((expr),(value))
39	};	102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
40		107
41	struct ev_watcher_list {	108	#define expect_false(expr) expect ((expr) != 0, 0)
42	EV_WATCHER_LIST (ev_watcher_list);	109	#define expect_true(expr) expect ((expr) != 0, 1)
43	};	110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
44		113
45	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
		116	typedef struct ev_watcher_time *WT;
47		117
48	static ev_tstamp now, diff; /* monotonic clock */	118	static ev_tstamp now_floor, now, diff; /* monotonic clock */
49	ev_tstamp ev_now;	119	ev_tstamp ev_now;
50	int ev_method;	120	int ev_method;
51		121
52	static int have_monotonic; /* runtime */	122	static int have_monotonic; /* runtime */
53		123
58	/*****************************************************************************/	128	/*****************************************************************************/
59		129
60	ev_tstamp	130	ev_tstamp
61	ev_time (void)	131	ev_time (void)
62	{	132	{
63	#if HAVE_REALTIME	133	#if EV_USE_REALTIME
64	struct timespec ts;	134	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	135	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	136	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	137	#else
68	struct timeval tv;	138	struct timeval tv;
…		…
72	}	142	}
73		143
74	static ev_tstamp	144	static ev_tstamp
75	get_clock (void)	145	get_clock (void)
76	{	146	{
77	#if HAVE_MONOTONIC	147	#if EV_USE_MONOTONIC
78	if (have_monotonic)	148	if (expect_true (have_monotonic))
79	{	149	{
80	struct timespec ts;	150	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	151	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	152	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	153	}
84	#endif	154	#endif
85		155
86	return ev_time ();	156	return ev_time ();
87	}	157	}
88		158
		159	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		160
89	#define array_needsize(base,cur,cnt,init) \	161	#define array_needsize(base,cur,cnt,init) \
90	if ((cnt) > cur) \	162	if (expect_false ((cnt) > cur)) \
91	{ \	163	{ \
92	int newcnt = cur ? cur << 1 : 16; \	164	int newcnt = cur; \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	165	do \
		166	{ \
		167	newcnt = array_roundsize (base, newcnt << 1); \
		168	} \
		169	while ((cnt) > newcnt); \
		170	\
94	base = realloc (base, sizeof (base) (newcnt)); \	171	base = realloc (base, sizeof (base) (newcnt)); \
95	init (base + cur, newcnt - cur); \	172	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	173	cur = newcnt; \
97	}	174	}
98		175
99	/*****************************************************************************/	176	/*****************************************************************************/
100		177
101	typedef struct	178	typedef struct
102	{	179	{
103	struct ev_io *head;	180	struct ev_io *head;
104	unsigned char wev, rev; /* want, received event set */	181	unsigned char events;
		182	unsigned char reify;
105	} ANFD;	183	} ANFD;
106		184
107	static ANFD *anfds;	185	static ANFD *anfds;
108	static int anfdmax;	186	static int anfdmax;
109		187
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	188	static void
114	anfds_init (ANFD *base, int count)	189	anfds_init (ANFD *base, int count)
115	{	190	{
116	while (count--)	191	while (count--)
117	{	192	{
118	base->head = 0;	193	base->head = 0;
119	base->wev = base->rev = EV_NONE;	194	base->events = EV_NONE;
		195	base->reify = 0;
		196
120	++base;	197	++base;
121	}	198	}
122	}	199	}
123		200
124	typedef struct	201	typedef struct
125	{	202	{
126	W w;	203	W w;
127	int events;	204	int events;
128	} ANPENDING;	205	} ANPENDING;
129		206
130	static ANPENDING *pendings;	207	static ANPENDING *pendings [NUMPRI];
131	static int pendingmax, pendingcnt;	208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
132		209
133	static void	210	static void
134	event (W w, int events)	211	event (W w, int events)
135	{	212	{
		213	if (w->pending)
		214	{
		215	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		216	return;
		217	}
		218
136	w->pending = ++pendingcnt;	219	w->pending = ++pendingcnt [ABSPRI (w)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
138	pendings [pendingcnt - 1].w = w;	221	pendings [ABSPRI (w)][w->pending - 1].w = w;
139	pendings [pendingcnt - 1].events = events;	222	pendings [ABSPRI (w)][w->pending - 1].events = events;
		223	}
		224
		225	static void
		226	queue_events (W *events, int eventcnt, int type)
		227	{
		228	int i;
		229
		230	for (i = 0; i < eventcnt; ++i)
		231	event (events [i], type);
140	}	232	}
141		233
142	static void	234	static void
143	fd_event (int fd, int events)	235	fd_event (int fd, int events)
144	{	236	{
…		…
152	if (ev)	244	if (ev)
153	event ((W)w, ev);	245	event ((W)w, ev);
154	}	246	}
155	}	247	}
156		248
		249	/*****************************************************************************/
		250
		251	static int *fdchanges;
		252	static int fdchangemax, fdchangecnt;
		253
157	static void	254	static void
158	queue_events (W *events, int eventcnt, int type)	255	fd_reify (void)
159	{	256	{
160	int i;	257	int i;
161		258
162	for (i = 0; i < eventcnt; ++i)	259	for (i = 0; i < fdchangecnt; ++i)
163	event (events [i], type);	260	{
		261	int fd = fdchanges [i];
		262	ANFD *anfd = anfds + fd;
		263	struct ev_io *w;
		264
		265	int events = 0;
		266
		267	for (w = anfd->head; w; w = w->next)
		268	events \|= w->events;
		269
		270	anfd->reify = 0;
		271
		272	if (anfd->events != events)
		273	{
		274	method_modify (fd, anfd->events, events);
		275	anfd->events = events;
		276	}
		277	}
		278
		279	fdchangecnt = 0;
		280	}
		281
		282	static void
		283	fd_change (int fd)
		284	{
		285	if (anfds [fd].reify \|\| fdchangecnt < 0)
		286	return;
		287
		288	anfds [fd].reify = 1;
		289
		290	++fdchangecnt;
		291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		292	fdchanges [fdchangecnt - 1] = fd;
		293	}
		294
		295	static void
		296	fd_kill (int fd)
		297	{
		298	struct ev_io *w;
		299
		300	printf ("killing fd %d\n", fd);//D
		301	while ((w = anfds [fd].head))
		302	{
		303	ev_io_stop (w);
		304	event ((W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		305	}
		306	}
		307
		308	/* called on EBADF to verify fds */
		309	static void
		310	fd_ebadf (void)
		311	{
		312	int fd;
		313
		314	for (fd = 0; fd < anfdmax; ++fd)
		315	if (anfds [fd].events)
		316	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		317	fd_kill (fd);
		318	}
		319
		320	/* called on ENOMEM in select/poll to kill some fds and retry */
		321	static void
		322	fd_enomem (void)
		323	{
		324	int fd = anfdmax;
		325
		326	while (fd--)
		327	if (anfds [fd].events)
		328	{
		329	close (fd);
		330	fd_kill (fd);
		331	return;
		332	}
164	}	333	}
165		334
166	/*****************************************************************************/	335	/*****************************************************************************/
167		336
168	static struct ev_timer **atimers;	337	static struct ev_timer **timers;
169	static int atimermax, atimercnt;	338	static int timermax, timercnt;
170		339
171	static struct ev_timer **rtimers;	340	static struct ev_periodic **periodics;
172	static int rtimermax, rtimercnt;	341	static int periodicmax, periodiccnt;
173		342
174	static void	343	static void
175	upheap (struct ev_timer **timers, int k)	344	upheap (WT *timers, int k)
176	{	345	{
177	struct ev_timer *w = timers [k];	346	WT w = timers [k];
178		347
179	while (k && timers [k >> 1]->at > w->at)	348	while (k && timers [k >> 1]->at > w->at)
180	{	349	{
181	timers [k] = timers [k >> 1];	350	timers [k] = timers [k >> 1];
182	timers [k]->active = k + 1;	351	timers [k]->active = k + 1;
…		…
187	timers [k]->active = k + 1;	356	timers [k]->active = k + 1;
188		357
189	}	358	}
190		359
191	static void	360	static void
192	downheap (struct ev_timer **timers, int N, int k)	361	downheap (WT *timers, int N, int k)
193	{	362	{
194	struct ev_timer *w = timers [k];	363	WT w = timers [k];
195		364
196	while (k < (N >> 1))	365	while (k < (N >> 1))
197	{	366	{
198	int j = k << 1;	367	int j = k << 1;
199		368
…		…
215	/*****************************************************************************/	384	/*****************************************************************************/
216		385
217	typedef struct	386	typedef struct
218	{	387	{
219	struct ev_signal *head;	388	struct ev_signal *head;
220	sig_atomic_t gotsig;	389	sig_atomic_t volatile gotsig;
221	} ANSIG;	390	} ANSIG;
222		391
223	static ANSIG *signals;	392	static ANSIG *signals;
224	static int signalmax;	393	static int signalmax;
225		394
226	static int sigpipe [2];	395	static int sigpipe [2];
227	static sig_atomic_t gotsig;	396	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	397	static struct ev_io sigev;
229		398
230	static void	399	static void
231	signals_init (ANSIG *base, int count)	400	signals_init (ANSIG *base, int count)
232	{	401	{
233	while (count--)	402	while (count--)
234	{	403	{
235	base->head = 0;	404	base->head = 0;
236	base->gotsig = 0;	405	base->gotsig = 0;
		406
237	++base;	407	++base;
238	}	408	}
239	}	409	}
240		410
241	static void	411	static void
…		…
243	{	413	{
244	signals [signum - 1].gotsig = 1;	414	signals [signum - 1].gotsig = 1;
245		415
246	if (!gotsig)	416	if (!gotsig)
247	{	417	{
		418	int old_errno = errno;
248	gotsig = 1;	419	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	420	write (sigpipe [1], &signum, 1);
		421	errno = old_errno;
250	}	422	}
251	}	423	}
252		424
253	static void	425	static void
254	sigcb (struct ev_io *iow, int revents)	426	sigcb (struct ev_io *iow, int revents)
255	{	427	{
256	struct ev_signal *w;	428	struct ev_signal *w;
257	int sig;	429	int signum;
258		430
		431	read (sigpipe [0], &revents, 1);
259	gotsig = 0;	432	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		433
262	for (sig = signalmax; sig--; )	434	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	435	if (signals [signum].gotsig)
264	{	436	{
265	signals [sig].gotsig = 0;	437	signals [signum].gotsig = 0;
266		438
267	for (w = signals [sig].head; w; w = w->next)	439	for (w = signals [signum].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);	440	event ((W)w, EV_SIGNAL);
269	}	441	}
270	}	442	}
271		443
272	static void	444	static void
273	siginit (void)	445	siginit (void)
274	{	446	{
		447	#ifndef WIN32
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	448	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		450
278	/* rather than sort out wether we really need nb, set it */	451	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	452	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		454	#endif
281		455
282	evio_set (&sigev, sigpipe [0], EV_READ);	456	ev_io_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);	457	ev_io_start (&sigev);
284	}	458	}
285		459
286	/*****************************************************************************/	460	/*****************************************************************************/
287		461
288	static struct ev_idle **idles;	462	static struct ev_idle **idles;
289	static int idlemax, idlecnt;	463	static int idlemax, idlecnt;
290		464
		465	static struct ev_prepare **prepares;
		466	static int preparemax, preparecnt;
		467
291	static struct ev_check **checks;	468	static struct ev_check **checks;
292	static int checkmax, checkcnt;	469	static int checkmax, checkcnt;
293		470
294	/*****************************************************************************/	471	/*****************************************************************************/
295		472
		473	static struct ev_child *childs [PID_HASHSIZE];
		474	static struct ev_signal childev;
		475
		476	#ifndef WIN32
		477
		478	#ifndef WCONTINUED
		479	# define WCONTINUED 0
		480	#endif
		481
		482	static void
		483	child_reap (struct ev_signal *sw, int chain, int pid, int status)
		484	{
		485	struct ev_child *w;
		486
		487	for (w = childs [chain & (PID_HASHSIZE - 1)]; w; w = w->next)
		488	if (w->pid == pid \|\| !w->pid)
		489	{
		490	w->priority = sw->priority; /* need to do it now */
		491	w->rpid = pid;
		492	w->rstatus = status;
		493	printf ("rpid %p %d %d\n", w, pid, w->pid);//D
		494	event ((W)w, EV_CHILD);
		495	}
		496	}
		497
		498	static void
		499	childcb (struct ev_signal *sw, int revents)
		500	{
		501	int pid, status;
		502
		503	printf ("chld %x\n", revents);//D
		504	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		505	{
		506	/* make sure we are called again until all childs have been reaped */
		507	event ((W)sw, EV_SIGNAL);
		508
		509	child_reap (sw, pid, pid, status);
		510	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		511	}
		512	}
		513
		514	#endif
		515
		516	/*****************************************************************************/
		517
		518	#if EV_USE_KQUEUE
		519	# include "ev_kqueue.c"
		520	#endif
296	#if HAVE_EPOLL	521	#if EV_USE_EPOLL
297	# include "ev_epoll.c"	522	# include "ev_epoll.c"
298	#endif	523	#endif
		524	#if EV_USE_POLL
		525	# include "ev_poll.c"
		526	#endif
299	#if HAVE_SELECT	527	#if EV_USE_SELECT
300	# include "ev_select.c"	528	# include "ev_select.c"
301	#endif	529	#endif
302		530
		531	int
		532	ev_version_major (void)
		533	{
		534	return EV_VERSION_MAJOR;
		535	}
		536
		537	int
		538	ev_version_minor (void)
		539	{
		540	return EV_VERSION_MINOR;
		541	}
		542
		543	/* return true if we are running with elevated privileges and ignore env variables */
		544	static int
		545	enable_secure ()
		546	{
		547	return getuid () != geteuid ()
		548	\|\| getgid () != getegid ();
		549	}
		550
303	int ev_init (int flags)	551	int ev_init (int methods)
304	{	552	{
305	#if HAVE_MONOTONIC
306	{
307	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;
310	}
311	#endif
312
313	ev_now = ev_time ();
314	now = get_clock ();
315	diff = ev_now - now;
316
317	if (pipe (sigpipe))
318	return 0;
319
320	ev_method = EVMETHOD_NONE;
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)	553	if (!ev_method)
		554	{
		555	#if EV_USE_MONOTONIC
329	{	556	{
		557	struct timespec ts;
		558	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		559	have_monotonic = 1;
		560	}
		561	#endif
		562
		563	ev_now = ev_time ();
		564	now = get_clock ();
		565	now_floor = now;
		566	diff = ev_now - now;
		567
		568	if (pipe (sigpipe))
		569	return 0;
		570
		571	if (methods == EVMETHOD_AUTO)
		572	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		573	methods = atoi (getenv ("LIBEV_METHODS"));
		574	else
		575	methods = EVMETHOD_ANY;
		576
		577	ev_method = 0;
		578	#if EV_USE_KQUEUE
		579	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
		580	#endif
		581	#if EV_USE_EPOLL
		582	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
		583	#endif
		584	#if EV_USE_POLL
		585	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
		586	#endif
		587	#if EV_USE_SELECT
		588	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
		589	#endif
		590
		591	if (ev_method)
		592	{
330	evw_init (&sigev, sigcb, 0);	593	ev_watcher_init (&sigev, sigcb);
		594	ev_set_priority (&sigev, EV_MAXPRI);
331	siginit ();	595	siginit ();
		596
		597	#ifndef WIN32
		598	ev_signal_init (&childev, childcb, SIGCHLD);
		599	ev_set_priority (&childev, EV_MAXPRI);
		600	ev_signal_start (&childev);
		601	#endif
		602	}
332	}	603	}
333		604
334	return ev_method;	605	return ev_method;
335	}	606	}
336		607
337	/*****************************************************************************/	608	/*****************************************************************************/
338		609
339	void ev_prefork (void)	610	void
		611	ev_fork_prepare (void)
340	{	612	{
		613	/* nop */
341	}	614	}
342		615
		616	void
343	void ev_postfork_parent (void)	617	ev_fork_parent (void)
344	{	618	{
		619	/* nop */
345	}	620	}
346		621
		622	void
347	void ev_postfork_child (void)	623	ev_fork_child (void)
348	{	624	{
349	#if HAVE_EPOLL	625	#if EV_USE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)	626	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();	627	epoll_postfork_child ();
352	#endif	628	#endif
353		629
354	evio_stop (&sigev);	630	ev_io_stop (&sigev);
355	close (sigpipe [0]);	631	close (sigpipe [0]);
356	close (sigpipe [1]);	632	close (sigpipe [1]);
357	pipe (sigpipe);	633	pipe (sigpipe);
358	siginit ();	634	siginit ();
359	}	635	}
360		636
361	/*****************************************************************************/	637	/*****************************************************************************/
362		638
363	static void	639	static void
364	fd_reify (void)	640	call_pending (void)
365	{	641	{
366	int i;	642	int pri;
367		643
368	for (i = 0; i < fdchangecnt; ++i)	644	for (pri = NUMPRI; pri--; )
369	{	645	while (pendingcnt [pri])
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	{	646	{
381	method_modify (fd, anfd->wev, wev);	647	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
382	anfd->wev = wev;
383	}
384	}
385		648
386	fdchangecnt = 0;
387	}
388
389	static void
390	call_pending ()
391	{
392	int i;
393
394	for (i = 0; i < pendingcnt; ++i)
395	{
396	ANPENDING *p = pendings + i;
397
398	if (p->w)	649	if (p->w)
399	{	650	{
400	p->w->pending = 0;	651	p->w->pending = 0;
401	p->w->cb (p->w, p->events);	652	p->w->cb (p->w, p->events);
402	}	653	}
403	}	654	}
404
405	pendingcnt = 0;
406	}	655	}
407		656
408	static void	657	static void
409	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	658	timers_reify (void)
410	{	659	{
411	while (timercnt && timers [0]->at <= now)	660	while (timercnt && timers [0]->at <= now)
412	{	661	{
413	struct ev_timer *w = timers [0];	662	struct ev_timer *w = timers [0];
414		663
415	/* first reschedule or stop timer */	664	/* first reschedule or stop timer */
416	if (w->repeat)	665	if (w->repeat)
417	{	666	{
418	if (w->is_abs)	667	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
419	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
420	else
421	w->at = now + w->repeat;	668	w->at = now + w->repeat;
422
423	assert (w->at > now);
424
425	downheap (timers, timercnt, 0);	669	downheap ((WT *)timers, timercnt, 0);
426	}	670	}
427	else	671	else
		672	ev_timer_stop (w); /* nonrepeating: stop timer */
		673
		674	event ((W)w, EV_TIMEOUT);
		675	}
		676	}
		677
		678	static void
		679	periodics_reify (void)
		680	{
		681	while (periodiccnt && periodics [0]->at <= ev_now)
		682	{
		683	struct ev_periodic *w = periodics [0];
		684
		685	/* first reschedule or stop timer */
		686	if (w->interval)
428	{	687	{
429	evtimer_stop (w); /* nonrepeating: stop timer */	688	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
430	--timercnt; /* maybe pass by reference instead? */	689	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));
		690	downheap ((WT *)periodics, periodiccnt, 0);
431	}	691	}
		692	else
		693	ev_periodic_stop (w); /* nonrepeating: stop timer */
432		694
433	event ((W)w, EV_TIMEOUT);	695	event ((W)w, EV_PERIODIC);
434	}	696	}
435	}	697	}
436		698
437	static void	699	static void
438	time_update ()	700	periodics_reschedule (ev_tstamp diff)
439	{	701	{
440	int i;	702	int i;
441	ev_now = ev_time ();
442		703
443	if (have_monotonic)	704	/* adjust periodics after time jump */
		705	for (i = 0; i < periodiccnt; ++i)
444	{	706	{
445	ev_tstamp odiff = diff;	707	struct ev_periodic *w = periodics [i];
446		708
447	/* detecting time jumps is much more difficult */	709	if (w->interval)
448	for (i = 2; --i; ) /* loop a few times, before making important decisions */
449	{	710	{
450	now = get_clock ();	711	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
451	diff = ev_now - now;
452		712
453	if (fabs (odiff - diff) < MIN_TIMEJUMP)	713	if (fabs (diff) >= 1e-4)
454	return; /* all is well */	714	{
		715	ev_periodic_stop (w);
		716	ev_periodic_start (w);
455		717
456	ev_now = ev_time ();	718	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		719	}
457	}	720	}
		721	}
		722	}
458		723
459	/* time jump detected, reschedule atimers */	724	static int
460	for (i = 0; i < atimercnt; ++i)	725	time_update_monotonic (void)
		726	{
		727	now = get_clock ();
		728
		729	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
		730	{
		731	ev_now = now + diff;
		732	return 0;
		733	}
		734	else
		735	{
		736	now_floor = now;
		737	ev_now = ev_time ();
		738	return 1;
		739	}
		740	}
		741
		742	static void
		743	time_update (void)
		744	{
		745	int i;
		746
		747	#if EV_USE_MONOTONIC
		748	if (expect_true (have_monotonic))
		749	{
		750	if (time_update_monotonic ())
461	{	751	{
462	struct ev_timer *w = atimers [i];	752	ev_tstamp odiff = diff;
463	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	753
		754	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		755	{
		756	diff = ev_now - now;
		757
		758	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		759	return; /* all is well */
		760
		761	ev_now = ev_time ();
		762	now = get_clock ();
		763	now_floor = now;
		764	}
		765
		766	periodics_reschedule (diff - odiff);
		767	/* no timer adjustment, as the monotonic clock doesn't jump */
464	}	768	}
465	}	769	}
466	else	770	else
		771	#endif
467	{	772	{
		773	ev_now = ev_time ();
		774
468	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	775	if (expect_false (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
469	/* time jump detected, adjust rtimers */	776	{
		777	periodics_reschedule (ev_now - now);
		778
		779	/* adjust timers. this is easy, as the offset is the same for all */
470	for (i = 0; i < rtimercnt; ++i)	780	for (i = 0; i < timercnt; ++i)
471	rtimers [i]->at += ev_now - now;	781	timers [i]->at += diff;
		782	}
472		783
473	now = ev_now;	784	now = ev_now;
474	}	785	}
475	}	786	}
476		787
477	int ev_loop_done;	788	int ev_loop_done;
478		789
479	void ev_loop (int flags)	790	void ev_loop (int flags)
480	{	791	{
481	double block;	792	double block;
482	ev_loop_done = flags & EVLOOP_ONESHOT;	793	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
483
484	if (checkcnt)
485	{
486	queue_events ((W *)checks, checkcnt, EV_CHECK);
487	call_pending ();
488	}
489		794
490	do	795	do
491	{	796	{
		797	/* queue check watchers (and execute them) */
		798	if (expect_false (preparecnt))
		799	{
		800	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		801	call_pending ();
		802	}
		803
492	/* update fd-related kernel structures */	804	/* update fd-related kernel structures */
493	fd_reify ();	805	fd_reify ();
494		806
495	/* calculate blocking time */	807	/* calculate blocking time */
		808
		809	/* we only need this for !monotonic clockor timers, but as we basically
		810	always have timers, we just calculate it always */
		811	#if EV_USE_MONOTONIC
		812	if (expect_true (have_monotonic))
		813	time_update_monotonic ();
		814	else
		815	#endif
		816	{
		817	ev_now = ev_time ();
		818	now = ev_now;
		819	}
		820
496	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	821	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
497	block = 0.;	822	block = 0.;
498	else	823	else
499	{	824	{
500	block = MAX_BLOCKTIME;	825	block = MAX_BLOCKTIME;
501		826
502	if (rtimercnt)	827	if (timercnt)
503	{	828	{
504	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	829	ev_tstamp to = timers [0]->at - now + method_fudge;
505	if (block > to) block = to;	830	if (block > to) block = to;
506	}	831	}
507		832
508	if (atimercnt)	833	if (periodiccnt)
509	{	834	{
510	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	835	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
511	if (block > to) block = to;	836	if (block > to) block = to;
512	}	837	}
513		838
514	if (block < 0.) block = 0.;	839	if (block < 0.) block = 0.;
515	}	840	}
…		…
518		843
519	/* update ev_now, do magic */	844	/* update ev_now, do magic */
520	time_update ();	845	time_update ();
521		846
522	/* queue pending timers and reschedule them */	847	/* queue pending timers and reschedule them */
523	/* absolute timers first */	848	timers_reify (); /* relative timers called last */
524	timers_reify (atimers, atimercnt, ev_now);	849	periodics_reify (); /* absolute timers called first */
525	/* relative timers second */
526	timers_reify (rtimers, rtimercnt, now);
527		850
528	/* queue idle watchers unless io or timers are pending */	851	/* queue idle watchers unless io or timers are pending */
529	if (!pendingcnt)	852	if (!pendingcnt)
530	queue_events ((W *)idles, idlecnt, EV_IDLE);	853	queue_events ((W *)idles, idlecnt, EV_IDLE);
531		854
532	/* queue check and possibly idle watchers */	855	/* queue check watchers, to be executed first */
		856	if (checkcnt)
533	queue_events ((W *)checks, checkcnt, EV_CHECK);	857	queue_events ((W *)checks, checkcnt, EV_CHECK);
534		858
535	call_pending ();	859	call_pending ();
536	}	860	}
537	while (!ev_loop_done);	861	while (!ev_loop_done);
		862
		863	if (ev_loop_done != 2)
		864	ev_loop_done = 0;
538	}	865	}
539		866
540	/*****************************************************************************/	867	/*****************************************************************************/
541		868
542	static void	869	static void
…		…
560	head = &(*head)->next;	887	head = &(*head)->next;
561	}	888	}
562	}	889	}
563		890
564	static void	891	static void
		892	ev_clear_pending (W w)
		893	{
		894	if (w->pending)
		895	{
		896	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		897	w->pending = 0;
		898	}
		899	}
		900
		901	static void
565	ev_start (W w, int active)	902	ev_start (W w, int active)
566	{	903	{
567	w->pending = 0;	904	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		905	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		906
568	w->active = active;	907	w->active = active;
569	}	908	}
570		909
571	static void	910	static void
572	ev_stop (W w)	911	ev_stop (W w)
573	{	912	{
574	if (w->pending)
575	pendings [w->pending - 1].w = 0;
576
577	w->active = 0;	913	w->active = 0;
578	/* nop */
579	}	914	}
580		915
581	/*****************************************************************************/	916	/*****************************************************************************/
582		917
583	void	918	void
584	evio_start (struct ev_io *w)	919	ev_io_start (struct ev_io *w)
585	{	920	{
		921	int fd = w->fd;
		922
586	if (ev_is_active (w))	923	if (ev_is_active (w))
587	return;	924	return;
588		925
589	int fd = w->fd;	926	assert (("ev_io_start called with negative fd", fd >= 0));
590		927
591	ev_start ((W)w, 1);	928	ev_start ((W)w, 1);
592	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	929	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
593	wlist_add ((WL *)&anfds[fd].head, (WL)w);	930	wlist_add ((WL *)&anfds[fd].head, (WL)w);
594		931
595	++fdchangecnt;	932	fd_change (fd);
596	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
597	fdchanges [fdchangecnt - 1] = fd;
598	}	933	}
599		934
600	void	935	void
601	evio_stop (struct ev_io *w)	936	ev_io_stop (struct ev_io *w)
602	{	937	{
		938	ev_clear_pending ((W)w);
603	if (!ev_is_active (w))	939	if (!ev_is_active (w))
604	return;	940	return;
605		941
606	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	942	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
607	ev_stop ((W)w);	943	ev_stop ((W)w);
608		944
609	++fdchangecnt;	945	fd_change (w->fd);
610	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
611	fdchanges [fdchangecnt - 1] = w->fd;
612	}	946	}
613		947
614	void	948	void
615	evtimer_start (struct ev_timer *w)	949	ev_timer_start (struct ev_timer *w)
616	{	950	{
617	if (ev_is_active (w))	951	if (ev_is_active (w))
618	return;	952	return;
619		953
620	if (w->is_abs)	954	w->at += now;
		955
		956	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		957
		958	ev_start ((W)w, ++timercnt);
		959	array_needsize (timers, timermax, timercnt, );
		960	timers [timercnt - 1] = w;
		961	upheap ((WT *)timers, timercnt - 1);
		962	}
		963
		964	void
		965	ev_timer_stop (struct ev_timer *w)
		966	{
		967	ev_clear_pending ((W)w);
		968	if (!ev_is_active (w))
		969	return;
		970
		971	if (w->active < timercnt--)
		972	{
		973	timers [w->active - 1] = timers [timercnt];
		974	downheap ((WT *)timers, timercnt, w->active - 1);
621	{	975	}
622	/* this formula differs from the one in timer_reify becuse we do not round up */	976
		977	w->at = w->repeat;
		978
		979	ev_stop ((W)w);
		980	}
		981
		982	void
		983	ev_timer_again (struct ev_timer *w)
		984	{
		985	if (ev_is_active (w))
		986	{
623	if (w->repeat)	987	if (w->repeat)
		988	{
		989	w->at = now + w->repeat;
		990	downheap ((WT *)timers, timercnt, w->active - 1);
		991	}
		992	else
		993	ev_timer_stop (w);
		994	}
		995	else if (w->repeat)
		996	ev_timer_start (w);
		997	}
		998
		999	void
		1000	ev_periodic_start (struct ev_periodic *w)
		1001	{
		1002	if (ev_is_active (w))
		1003	return;
		1004
		1005	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1006
		1007	/* this formula differs from the one in periodic_reify because we do not always round up */
		1008	if (w->interval)
624	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1009	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
625		1010
626	ev_start ((W)w, ++atimercnt);	1011	ev_start ((W)w, ++periodiccnt);
627	array_needsize (atimers, atimermax, atimercnt, );	1012	array_needsize (periodics, periodicmax, periodiccnt, );
628	atimers [atimercnt - 1] = w;	1013	periodics [periodiccnt - 1] = w;
629	upheap (atimers, atimercnt - 1);	1014	upheap ((WT *)periodics, periodiccnt - 1);
630	}
631	else
632	{
633	w->at += now;
634
635	ev_start ((W)w, ++rtimercnt);
636	array_needsize (rtimers, rtimermax, rtimercnt, );
637	rtimers [rtimercnt - 1] = w;
638	upheap (rtimers, rtimercnt - 1);
639	}
640
641	}	1015	}
642		1016
643	void	1017	void
644	evtimer_stop (struct ev_timer *w)	1018	ev_periodic_stop (struct ev_periodic *w)
645	{	1019	{
		1020	ev_clear_pending ((W)w);
646	if (!ev_is_active (w))	1021	if (!ev_is_active (w))
647	return;	1022	return;
648		1023
649	if (w->is_abs)
650	{
651	if (w->active < atimercnt--)	1024	if (w->active < periodiccnt--)
652	{
653	atimers [w->active - 1] = atimers [atimercnt];
654	downheap (atimers, atimercnt, w->active - 1);
655	}
656	}	1025	{
657	else	1026	periodics [w->active - 1] = periodics [periodiccnt];
658	{	1027	downheap ((WT *)periodics, periodiccnt, w->active - 1);
659	if (w->active < rtimercnt--)
660	{
661	rtimers [w->active - 1] = rtimers [rtimercnt];
662	downheap (rtimers, rtimercnt, w->active - 1);
663	}
664	}	1028	}
665		1029
666	ev_stop ((W)w);	1030	ev_stop ((W)w);
667	}	1031	}
668		1032
		1033	#ifndef SA_RESTART
		1034	# define SA_RESTART 0
		1035	#endif
		1036
669	void	1037	void
670	evsignal_start (struct ev_signal *w)	1038	ev_signal_start (struct ev_signal *w)
671	{	1039	{
672	if (ev_is_active (w))	1040	if (ev_is_active (w))
673	return;	1041	return;
		1042
		1043	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
674		1044
675	ev_start ((W)w, 1);	1045	ev_start ((W)w, 1);
676	array_needsize (signals, signalmax, w->signum, signals_init);	1046	array_needsize (signals, signalmax, w->signum, signals_init);
677	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1047	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
678		1048
679	if (!w->next)	1049	if (!w->next)
680	{	1050	{
681	struct sigaction sa;	1051	struct sigaction sa;
682	sa.sa_handler = sighandler;	1052	sa.sa_handler = sighandler;
683	sigfillset (&sa.sa_mask);	1053	sigfillset (&sa.sa_mask);
684	sa.sa_flags = 0;	1054	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
685	sigaction (w->signum, &sa, 0);	1055	sigaction (w->signum, &sa, 0);
686	}	1056	}
687	}	1057	}
688		1058
689	void	1059	void
690	evsignal_stop (struct ev_signal *w)	1060	ev_signal_stop (struct ev_signal *w)
691	{	1061	{
		1062	ev_clear_pending ((W)w);
692	if (!ev_is_active (w))	1063	if (!ev_is_active (w))
693	return;	1064	return;
694		1065
695	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1066	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
696	ev_stop ((W)w);	1067	ev_stop ((W)w);
697		1068
698	if (!signals [w->signum - 1].head)	1069	if (!signals [w->signum - 1].head)
699	signal (w->signum, SIG_DFL);	1070	signal (w->signum, SIG_DFL);
700	}	1071	}
701		1072
		1073	void
702	void evidle_start (struct ev_idle *w)	1074	ev_idle_start (struct ev_idle *w)
703	{	1075	{
704	if (ev_is_active (w))	1076	if (ev_is_active (w))
705	return;	1077	return;
706		1078
707	ev_start ((W)w, ++idlecnt);	1079	ev_start ((W)w, ++idlecnt);
708	array_needsize (idles, idlemax, idlecnt, );	1080	array_needsize (idles, idlemax, idlecnt, );
709	idles [idlecnt - 1] = w;	1081	idles [idlecnt - 1] = w;
710	}	1082	}
711		1083
		1084	void
712	void evidle_stop (struct ev_idle *w)	1085	ev_idle_stop (struct ev_idle *w)
713	{	1086	{
		1087	ev_clear_pending ((W)w);
		1088	if (ev_is_active (w))
		1089	return;
		1090
714	idles [w->active - 1] = idles [--idlecnt];	1091	idles [w->active - 1] = idles [--idlecnt];
715	ev_stop ((W)w);	1092	ev_stop ((W)w);
716	}	1093	}
717		1094
		1095	void
		1096	ev_prepare_start (struct ev_prepare *w)
		1097	{
		1098	if (ev_is_active (w))
		1099	return;
		1100
		1101	ev_start ((W)w, ++preparecnt);
		1102	array_needsize (prepares, preparemax, preparecnt, );
		1103	prepares [preparecnt - 1] = w;
		1104	}
		1105
		1106	void
		1107	ev_prepare_stop (struct ev_prepare *w)
		1108	{
		1109	ev_clear_pending ((W)w);
		1110	if (ev_is_active (w))
		1111	return;
		1112
		1113	prepares [w->active - 1] = prepares [--preparecnt];
		1114	ev_stop ((W)w);
		1115	}
		1116
		1117	void
718	void evcheck_start (struct ev_check *w)	1118	ev_check_start (struct ev_check *w)
719	{	1119	{
720	if (ev_is_active (w))	1120	if (ev_is_active (w))
721	return;	1121	return;
722		1122
723	ev_start ((W)w, ++checkcnt);	1123	ev_start ((W)w, ++checkcnt);
724	array_needsize (checks, checkmax, checkcnt, );	1124	array_needsize (checks, checkmax, checkcnt, );
725	checks [checkcnt - 1] = w;	1125	checks [checkcnt - 1] = w;
726	}	1126	}
727		1127
		1128	void
728	void evcheck_stop (struct ev_check *w)	1129	ev_check_stop (struct ev_check *w)
729	{	1130	{
		1131	ev_clear_pending ((W)w);
		1132	if (ev_is_active (w))
		1133	return;
		1134
730	checks [w->active - 1] = checks [--checkcnt];	1135	checks [w->active - 1] = checks [--checkcnt];
731	ev_stop ((W)w);	1136	ev_stop ((W)w);
732	}	1137	}
733		1138
		1139	void
		1140	ev_child_start (struct ev_child *w)
		1141	{
		1142	if (ev_is_active (w))
		1143	return;
		1144
		1145	ev_start ((W)w, 1);
		1146	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1147	}
		1148
		1149	void
		1150	ev_child_stop (struct ev_child *w)
		1151	{
		1152	ev_clear_pending ((W)w);
		1153	if (ev_is_active (w))
		1154	return;
		1155
		1156	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1157	ev_stop ((W)w);
		1158	}
		1159
734	/*****************************************************************************/	1160	/*****************************************************************************/
735		1161
		1162	struct ev_once
		1163	{
		1164	struct ev_io io;
		1165	struct ev_timer to;
		1166	void (cb)(int revents, void arg);
		1167	void *arg;
		1168	};
		1169
		1170	static void
		1171	once_cb (struct ev_once *once, int revents)
		1172	{
		1173	void (cb)(int revents, void arg) = once->cb;
		1174	void *arg = once->arg;
		1175
		1176	ev_io_stop (&once->io);
		1177	ev_timer_stop (&once->to);
		1178	free (once);
		1179
		1180	cb (revents, arg);
		1181	}
		1182
		1183	static void
		1184	once_cb_io (struct ev_io *w, int revents)
		1185	{
		1186	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1187	}
		1188
		1189	static void
		1190	once_cb_to (struct ev_timer *w, int revents)
		1191	{
		1192	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1193	}
		1194
		1195	void
		1196	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1197	{
		1198	struct ev_once *once = malloc (sizeof (struct ev_once));
		1199
		1200	if (!once)
		1201	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1202	else
		1203	{
		1204	once->cb = cb;
		1205	once->arg = arg;
		1206
		1207	ev_watcher_init (&once->io, once_cb_io);
		1208	if (fd >= 0)
		1209	{
		1210	ev_io_set (&once->io, fd, events);
		1211	ev_io_start (&once->io);
		1212	}
		1213
		1214	ev_watcher_init (&once->to, once_cb_to);
		1215	if (timeout >= 0.)
		1216	{
		1217	ev_timer_set (&once->to, timeout, 0.);
		1218	ev_timer_start (&once->to);
		1219	}
		1220	}
		1221	}
		1222
		1223	/*****************************************************************************/
		1224
736	#if 0	1225	#if 0
737		1226
		1227	struct ev_io wio;
		1228
738	static void	1229	static void
739	sin_cb (struct ev_io *w, int revents)	1230	sin_cb (struct ev_io *w, int revents)
740	{	1231	{
741	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1232	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
742	}	1233	}
743		1234
744	static void	1235	static void
745	ocb (struct ev_timer *w, int revents)	1236	ocb (struct ev_timer *w, int revents)
746	{	1237	{
747	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1238	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
748	evtimer_stop (w);	1239	ev_timer_stop (w);
749	evtimer_start (w);	1240	ev_timer_start (w);
750	}	1241	}
751		1242
752	static void	1243	static void
753	scb (struct ev_signal *w, int revents)	1244	scb (struct ev_signal *w, int revents)
754	{	1245	{
755	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1246	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1247	ev_io_stop (&wio);
		1248	ev_io_start (&wio);
756	}	1249	}
757		1250
758	static void	1251	static void
759	gcb (struct ev_signal *w, int revents)	1252	gcb (struct ev_signal *w, int revents)
760	{	1253	{
761	fprintf (stderr, "generic %x\n", revents);	1254	fprintf (stderr, "generic %x\n", revents);
		1255
762	}	1256	}
763		1257
764	int main (void)	1258	int main (void)
765	{	1259	{
766	struct ev_io sin;
767
768	ev_init (0);	1260	ev_init (0);
769		1261
770	evw_init (&sin, sin_cb, 55);
771	evio_set (&sin, 0, EV_READ);	1262	ev_io_init (&wio, sin_cb, 0, EV_READ);
772	evio_start (&sin);	1263	ev_io_start (&wio);
773		1264
774	struct ev_timer t[10000];	1265	struct ev_timer t[10000];
775		1266
776	#if 0	1267	#if 0
777	int i;	1268	int i;
778	for (i = 0; i < 10000; ++i)	1269	for (i = 0; i < 10000; ++i)
779	{	1270	{
780	struct ev_timer *w = t + i;	1271	struct ev_timer *w = t + i;
781	evw_init (w, ocb, i);	1272	ev_watcher_init (w, ocb, i);
782	evtimer_set_abs (w, drand48 (), 0.99775533);	1273	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
783	evtimer_start (w);	1274	ev_timer_start (w);
784	if (drand48 () < 0.5)	1275	if (drand48 () < 0.5)
785	evtimer_stop (w);	1276	ev_timer_stop (w);
786	}	1277	}
787	#endif	1278	#endif
788		1279
789	struct ev_timer t1;	1280	struct ev_timer t1;
790	evw_init (&t1, ocb, 0);	1281	ev_timer_init (&t1, ocb, 5, 10);
791	evtimer_set_abs (&t1, 5, 10);
792	evtimer_start (&t1);	1282	ev_timer_start (&t1);
793		1283
794	struct ev_signal sig;	1284	struct ev_signal sig;
795	evw_init (&sig, scb, 65535);
796	evsignal_set (&sig, SIGQUIT);	1285	ev_signal_init (&sig, scb, SIGQUIT);
797	evsignal_start (&sig);	1286	ev_signal_start (&sig);
798		1287
799	struct ev_check cw;	1288	struct ev_check cw;
800	evw_init (&cw, gcb, 0);	1289	ev_check_init (&cw, gcb);
801	evcheck_start (&cw);	1290	ev_check_start (&cw);
802		1291
803	struct ev_idle iw;	1292	struct ev_idle iw;
804	evw_init (&iw, gcb, 0);	1293	ev_idle_init (&iw, gcb);
805	evidle_start (&iw);	1294	ev_idle_start (&iw);
806		1295
807	ev_loop (0);	1296	ev_loop (0);
808		1297
809	return 0;	1298	return 0;
810	}	1299	}

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs. Revision 1.48 by root, Sat Nov 3 12:19:31 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs.
Revision 1.48 by root, Sat Nov 3 12:19:31 2007 UTC