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Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.47 by root, Sat Nov 3 11:44:44 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
		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
14	#ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
16	#endif	84	#endif
17		85
		86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	88	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	89	#endif
20	#define HAVE_SELECT 1	90
		91	/**/
21		92
22	#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) */
23	#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 */
24		97
25	#include "ev.h"	98	#include "ev.h"
26		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		113
27	struct ev_watcher {	114	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);
29	};
30
31	struct ev_watcher_list {	115	typedef struct ev_watcher_list *WL;
32	EV_WATCHER_LIST (ev_watcher_list);	116	typedef struct ev_watcher_time *WT;
33	};
34		117
35	static ev_tstamp now, diff; /* monotonic clock */	118	static ev_tstamp now_floor, now, diff; /* monotonic clock */
36	ev_tstamp ev_now;	119	ev_tstamp ev_now;
37	int ev_method;	120	int ev_method;
38		121
39	static int have_monotonic; /* runtime */	122	static int have_monotonic; /* runtime */
40		123
…		…
45	/*****************************************************************************/	128	/*****************************************************************************/
46		129
47	ev_tstamp	130	ev_tstamp
48	ev_time (void)	131	ev_time (void)
49	{	132	{
50	#if HAVE_REALTIME	133	#if EV_USE_REALTIME
51	struct timespec ts;	134	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	135	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	136	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	137	#else
55	struct timeval tv;	138	struct timeval tv;
…		…
59	}	142	}
60		143
61	static ev_tstamp	144	static ev_tstamp
62	get_clock (void)	145	get_clock (void)
63	{	146	{
64	#if HAVE_MONOTONIC	147	#if EV_USE_MONOTONIC
65	if (have_monotonic)	148	if (expect_true (have_monotonic))
66	{	149	{
67	struct timespec ts;	150	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	151	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	152	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	153	}
71	#endif	154	#endif
72		155
73	return ev_time ();	156	return ev_time ();
74	}	157	}
75		158
		159	#define array_roundsize(base,n) ((n) | 4 & ~3)
		160
76	#define array_needsize(base,cur,cnt,init) \	161	#define array_needsize(base,cur,cnt,init) \
77	if ((cnt) > cur) \	162	if (expect_false ((cnt) > cur)) \
78	{ \	163	{ \
79	int newcnt = cur ? cur << 1 : 16; \	164	int newcnt = cur; \
80	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	\
81	base = realloc (base, sizeof (*base) * (newcnt)); \	171	base = realloc (base, sizeof (*base) * (newcnt)); \
82	init (base + cur, newcnt - cur); \	172	init (base + cur, newcnt - cur); \
83	cur = newcnt; \	173	cur = newcnt; \
84	}	174	}
85		175
86	/*****************************************************************************/	176	/*****************************************************************************/
87		177
88	typedef struct	178	typedef struct
89	{	179	{
90	struct ev_io *head;	180	struct ev_io *head;
91	unsigned char wev, rev; /* want, received event set */	181	unsigned char events;
		182	unsigned char reify;
92	} ANFD;	183	} ANFD;
93		184
94	static ANFD *anfds;	185	static ANFD *anfds;
95	static int anfdmax;	186	static int anfdmax;
96		187
		188	static void
		189	anfds_init (ANFD *base, int count)
		190	{
		191	while (count--)
		192	{
		193	base->head = 0;
		194	base->events = EV_NONE;
		195	base->reify = 0;
		196
		197	++base;
		198	}
		199	}
		200
		201	typedef struct
		202	{
		203	W w;
		204	int events;
		205	} ANPENDING;
		206
		207	static ANPENDING *pendings [NUMPRI];
		208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
		209
		210	static void
		211	event (W w, int events)
		212	{
		213	if (w->pending)
		214	{
		215	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		216	return;
		217	}
		218
		219	w->pending = ++pendingcnt [ABSPRI (w)];
		220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		221	pendings [ABSPRI (w)][w->pending - 1].w = w;
		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);
		232	}
		233
		234	static void
		235	fd_event (int fd, int events)
		236	{
		237	ANFD *anfd = anfds + fd;
		238	struct ev_io *w;
		239
		240	for (w = anfd->head; w; w = w->next)
		241	{
		242	int ev = w->events & events;
		243
		244	if (ev)
		245	event ((W)w, ev);
		246	}
		247	}
		248
		249	/*****************************************************************************/
		250
97	static int *fdchanges;	251	static int *fdchanges;
98	static int fdchangemax, fdchangecnt;	252	static int fdchangemax, fdchangecnt;
99		253
100	static void	254	static void
101	anfds_init (ANFD *base, int count)	255	fd_reify (void)
102	{	256	{
103	while (count--)	257	int i;
104	{	258
105	base->head = 0;	259	for (i = 0; i < fdchangecnt; ++i)
106	base->wev = base->rev = EV_NONE;
107	++base;
108	}	260	{
109	}	261	int fd = fdchanges [i];
110
111	typedef struct
112	{
113	struct ev_watcher *w;
114	int events;
115	} ANPENDING;
116
117	static ANPENDING *pendings;
118	static int pendingmax, pendingcnt;
119
120	static void
121	event (struct ev_watcher *w, int events)
122	{
123	w->pending = ++pendingcnt;
124	array_needsize (pendings, pendingmax, pendingcnt, );
125	pendings [pendingcnt - 1].w = w;
126	pendings [pendingcnt - 1].events = events;
127	}
128
129	static void
130	fd_event (int fd, int events)
131	{
132	ANFD *anfd = anfds + fd;	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	{
133	struct ev_io *w;	298	struct ev_io *w;
134		299
135	for (w = anfd->head; w; w = w->next)	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)
136	{	328	{
137	int ev = w->events & events;	329	close (fd);
138		330	fd_kill (fd);
139	if (ev)	331	return;
140	event ((struct ev_watcher *)w, ev);
141	}	332	}
142	}	333	}
143		334
144	/*****************************************************************************/	335	/*****************************************************************************/
145		336
146	static struct ev_timer **atimers;	337	static struct ev_timer **timers;
147	static int atimermax, atimercnt;	338	static int timermax, timercnt;
148		339
149	static struct ev_timer **rtimers;	340	static struct ev_periodic **periodics;
150	static int rtimermax, rtimercnt;	341	static int periodicmax, periodiccnt;
151		342
152	static void	343	static void
153	upheap (struct ev_timer **timers, int k)	344	upheap (WT *timers, int k)
154	{	345	{
155	struct ev_timer *w = timers [k];	346	WT w = timers [k];
156		347
157	while (k && timers [k >> 1]->at > w->at)	348	while (k && timers [k >> 1]->at > w->at)
158	{	349	{
159	timers [k] = timers [k >> 1];	350	timers [k] = timers [k >> 1];
160	timers [k]->active = k + 1;	351	timers [k]->active = k + 1;
…		…
165	timers [k]->active = k + 1;	356	timers [k]->active = k + 1;
166		357
167	}	358	}
168		359
169	static void	360	static void
170	downheap (struct ev_timer **timers, int N, int k)	361	downheap (WT *timers, int N, int k)
171	{	362	{
172	struct ev_timer *w = timers [k];	363	WT w = timers [k];
173		364
174	while (k < (N >> 1))	365	while (k < (N >> 1))
175	{	366	{
176	int j = k << 1;	367	int j = k << 1;
177		368
…		…
193	/*****************************************************************************/	384	/*****************************************************************************/
194		385
195	typedef struct	386	typedef struct
196	{	387	{
197	struct ev_signal *head;	388	struct ev_signal *head;
198	sig_atomic_t gotsig;	389	sig_atomic_t volatile gotsig;
199	} ANSIG;	390	} ANSIG;
200		391
201	static ANSIG *signals;	392	static ANSIG *signals;
202	static int signalmax;	393	static int signalmax;
203		394
204	static int sigpipe [2];	395	static int sigpipe [2];
205	static sig_atomic_t gotsig;	396	static sig_atomic_t volatile gotsig;
206	static struct ev_io sigev;	397	static struct ev_io sigev;
207		398
208	static void	399	static void
209	signals_init (ANSIG *base, int count)	400	signals_init (ANSIG *base, int count)
210	{	401	{
211	while (count--)	402	while (count--)
212	{	403	{
213	base->head = 0;	404	base->head = 0;
214	base->gotsig = 0;	405	base->gotsig = 0;
		406
215	++base;	407	++base;
216	}	408	}
217	}	409	}
218		410
219	static void	411	static void
…		…
222	signals [signum - 1].gotsig = 1;	414	signals [signum - 1].gotsig = 1;
223		415
224	if (!gotsig)	416	if (!gotsig)
225	{	417	{
226	gotsig = 1;	418	gotsig = 1;
227	write (sigpipe [1], &gotsig, 1);	419	write (sigpipe [1], &signum, 1);
228	}	420	}
229	}	421	}
230		422
231	static void	423	static void
232	sigcb (struct ev_io *iow, int revents)	424	sigcb (struct ev_io *iow, int revents)
233	{	425	{
234	struct ev_signal *w;	426	struct ev_signal *w;
235	int sig;	427	int signum;
236		428
		429	read (sigpipe [0], &revents, 1);
237	gotsig = 0;	430	gotsig = 0;
238	read (sigpipe [0], &revents, 1);
239		431
240	for (sig = signalmax; sig--; )	432	for (signum = signalmax; signum--; )
241	if (signals [sig].gotsig)	433	if (signals [signum].gotsig)
242	{	434	{
243	signals [sig].gotsig = 0;	435	signals [signum].gotsig = 0;
244		436
245	for (w = signals [sig].head; w; w = w->next)	437	for (w = signals [signum].head; w; w = w->next)
246	event ((struct ev_watcher *)w, EV_SIGNAL);	438	event ((W)w, EV_SIGNAL);
247	}	439	}
248	}	440	}
249		441
250	static void	442	static void
251	siginit (void)	443	siginit (void)
252	{	444	{
		445	#ifndef WIN32
253	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	446	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
254	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	447	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
255		448
256	/* rather than sort out wether we really need nb, set it */	449	/* rather than sort out wether we really need nb, set it */
257	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	450	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
258	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	451	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		452	#endif
259		453
260	evio_set (&sigev, sigpipe [0], EV_READ);	454	ev_io_set (&sigev, sigpipe [0], EV_READ);
261	evio_start (&sigev);	455	ev_io_start (&sigev);
262	}	456	}
263		457
264	/*****************************************************************************/	458	/*****************************************************************************/
265		459
		460	static struct ev_idle **idles;
		461	static int idlemax, idlecnt;
		462
		463	static struct ev_prepare **prepares;
		464	static int preparemax, preparecnt;
		465
		466	static struct ev_check **checks;
		467	static int checkmax, checkcnt;
		468
		469	/*****************************************************************************/
		470
		471	static struct ev_child *childs [PID_HASHSIZE];
		472	static struct ev_signal childev;
		473
		474	#ifndef WIN32
		475
		476	#ifndef WCONTINUED
		477	# define WCONTINUED 0
		478	#endif
		479
		480	static void
		481	child_reap (struct ev_signal *sw, int chain, int pid, int status)
		482	{
		483	struct ev_child *w;
		484
		485	for (w = childs [chain & (PID_HASHSIZE - 1)]; w; w = w->next)
		486	if (w->pid == pid || !w->pid)
		487	{
		488	w->priority = sw->priority; /* need to do it *now* */
		489	w->rpid = pid;
		490	w->rstatus = status;
		491	printf ("rpid %p %d %d\n", w, pid, w->pid);//D
		492	event ((W)w, EV_CHILD);
		493	}
		494	}
		495
		496	static void
		497	childcb (struct ev_signal *sw, int revents)
		498	{
		499	int pid, status;
		500
		501	printf ("chld %x\n", revents);//D
		502	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		503	{
		504	/* make sure we are called again until all childs have been reaped */
		505	event ((W)sw, EV_SIGNAL);
		506
		507	child_reap (sw, pid, pid, status);
		508	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		509	}
		510	}
		511
		512	#endif
		513
		514	/*****************************************************************************/
		515
		516	#if EV_USE_KQUEUE
		517	# include "ev_kqueue.c"
		518	#endif
266	#if HAVE_EPOLL	519	#if EV_USE_EPOLL
267	# include "ev_epoll.c"	520	# include "ev_epoll.c"
268	#endif	521	#endif
		522	#if EV_USE_POLL
		523	# include "ev_poll.c"
		524	#endif
269	#if HAVE_SELECT	525	#if EV_USE_SELECT
270	# include "ev_select.c"	526	# include "ev_select.c"
271	#endif	527	#endif
272		528
		529	int
		530	ev_version_major (void)
		531	{
		532	return EV_VERSION_MAJOR;
		533	}
		534
		535	int
		536	ev_version_minor (void)
		537	{
		538	return EV_VERSION_MINOR;
		539	}
		540
		541	/* return true if we are running with elevated privileges and ignore env variables */
		542	static int
		543	enable_secure ()
		544	{
		545	return getuid () != geteuid ()
		546	|| getgid () != getegid ();
		547	}
		548
273	int ev_init (int flags)	549	int ev_init (int methods)
274	{	550	{
275	#if HAVE_MONOTONIC
276	{
277	struct timespec ts;
278	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
279	have_monotonic = 1;
280	}
281	#endif
282
283	ev_now = ev_time ();
284	now = get_clock ();
285	diff = ev_now - now;
286
287	if (pipe (sigpipe))
288	return 0;
289
290	ev_method = EVMETHOD_NONE;
291	#if HAVE_EPOLL
292	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
293	#endif
294	#if HAVE_SELECT
295	if (ev_method == EVMETHOD_NONE) select_init (flags);
296	#endif
297
298	if (ev_method)	551	if (!ev_method)
		552	{
		553	#if EV_USE_MONOTONIC
299	{	554	{
		555	struct timespec ts;
		556	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		557	have_monotonic = 1;
		558	}
		559	#endif
		560
		561	ev_now = ev_time ();
		562	now = get_clock ();
		563	now_floor = now;
		564	diff = ev_now - now;
		565
		566	if (pipe (sigpipe))
		567	return 0;
		568
		569	if (methods == EVMETHOD_AUTO)
		570	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		571	methods = atoi (getenv ("LIBEV_METHODS"));
		572	else
		573	methods = EVMETHOD_ANY;
		574
		575	ev_method = 0;
		576	#if EV_USE_KQUEUE
		577	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
		578	#endif
		579	#if EV_USE_EPOLL
		580	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
		581	#endif
		582	#if EV_USE_POLL
		583	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
		584	#endif
		585	#if EV_USE_SELECT
		586	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
		587	#endif
		588
		589	if (ev_method)
		590	{
300	evw_init (&sigev, sigcb, 0);	591	ev_watcher_init (&sigev, sigcb);
		592	ev_set_priority (&sigev, EV_MAXPRI);
301	siginit ();	593	siginit ();
		594
		595	#ifndef WIN32
		596	ev_signal_init (&childev, childcb, SIGCHLD);
		597	ev_set_priority (&childev, EV_MAXPRI);
		598	ev_signal_start (&childev);
		599	#endif
		600	}
302	}	601	}
303		602
304	return ev_method;	603	return ev_method;
305	}	604	}
306		605
307	/*****************************************************************************/	606	/*****************************************************************************/
308		607
309	void ev_prefork (void)	608	void
		609	ev_fork_prepare (void)
310	{	610	{
		611	/* nop */
311	}	612	}
312		613
		614	void
313	void ev_postfork_parent (void)	615	ev_fork_parent (void)
314	{	616	{
		617	/* nop */
315	}	618	}
316		619
		620	void
317	void ev_postfork_child (void)	621	ev_fork_child (void)
318	{	622	{
319	#if HAVE_EPOLL	623	#if EV_USE_EPOLL
320	if (ev_method == EVMETHOD_EPOLL)	624	if (ev_method == EVMETHOD_EPOLL)
321	epoll_postfork_child ();	625	epoll_postfork_child ();
322	#endif	626	#endif
323		627
324	evio_stop (&sigev);	628	ev_io_stop (&sigev);
325	close (sigpipe [0]);	629	close (sigpipe [0]);
326	close (sigpipe [1]);	630	close (sigpipe [1]);
327	pipe (sigpipe);	631	pipe (sigpipe);
328	siginit ();	632	siginit ();
329	}	633	}
330		634
331	/*****************************************************************************/	635	/*****************************************************************************/
332		636
333	static ev_hook hooks [EVHOOK_NUM];
334
335	void
336	ev_hook_register (int type, ev_hook hook)
337	{
338	hooks [type] = hook;
339	}
340
341	void
342	ev_hook_unregister (int type, ev_hook hook)
343	{
344	hooks [type] = 0;
345	}
346
347	static void	637	static void
348	hook_call (int type)	638	call_pending (void)
349	{	639	{
350	if (hooks [type])
351	hooks [type] ();
352	}
353
354	static void
355	fd_reify (void)
356	{
357	int i;	640	int pri;
358		641
359	for (i = 0; i < fdchangecnt; ++i)	642	for (pri = NUMPRI; pri--; )
360	{	643	while (pendingcnt [pri])
361	int fd = fdchanges [i];
362	ANFD *anfd = anfds + fd;
363	struct ev_io *w;
364
365	int wev = 0;
366
367	for (w = anfd->head; w; w = w->next)
368	wev |= w->events;
369
370	if (anfd->wev != wev)
371	{	644	{
372	method_modify (fd, anfd->wev, wev);	645	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
373	anfd->wev = wev;
374	}
375	}
376		646
377	fdchangecnt = 0;
378	}
379
380	static void
381	call_pending ()
382	{
383	int i;
384
385	for (i = 0; i < pendingcnt; ++i)
386	{
387	ANPENDING *p = pendings + i;
388
389	if (p->w)	647	if (p->w)
390	{	648	{
391	p->w->pending = 0;	649	p->w->pending = 0;
392	p->w->cb (p->w, p->events);	650	p->w->cb (p->w, p->events);
393	}	651	}
394	}	652	}
395
396	pendingcnt = 0;
397	}	653	}
398		654
399	static void	655	static void
400	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	656	timers_reify (void)
401	{	657	{
402	while (timercnt && timers [0]->at <= now)	658	while (timercnt && timers [0]->at <= now)
403	{	659	{
404	struct ev_timer *w = timers [0];	660	struct ev_timer *w = timers [0];
405		661
406	/* first reschedule or stop timer */	662	/* first reschedule or stop timer */
407	if (w->repeat)	663	if (w->repeat)
408	{	664	{
409	if (w->is_abs)	665	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
410	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
411	else
412	w->at = now + w->repeat;	666	w->at = now + w->repeat;
413
414	assert (w->at > now);
415
416	downheap (timers, timercnt, 0);	667	downheap ((WT *)timers, timercnt, 0);
417	}	668	}
418	else	669	else
		670	ev_timer_stop (w); /* nonrepeating: stop timer */
		671
		672	event ((W)w, EV_TIMEOUT);
		673	}
		674	}
		675
		676	static void
		677	periodics_reify (void)
		678	{
		679	while (periodiccnt && periodics [0]->at <= ev_now)
		680	{
		681	struct ev_periodic *w = periodics [0];
		682
		683	/* first reschedule or stop timer */
		684	if (w->interval)
419	{	685	{
420	evtimer_stop (w); /* nonrepeating: stop timer */	686	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
421	--timercnt; /* maybe pass by reference instead? */	687	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));
		688	downheap ((WT *)periodics, periodiccnt, 0);
422	}	689	}
		690	else
		691	ev_periodic_stop (w); /* nonrepeating: stop timer */
423		692
424	event ((struct ev_watcher *)w, EV_TIMEOUT);	693	event ((W)w, EV_PERIODIC);
425	}	694	}
426	}	695	}
427		696
428	static void	697	static void
429	time_update ()	698	periodics_reschedule (ev_tstamp diff)
430	{	699	{
431	int i;	700	int i;
432	ev_now = ev_time ();
433		701
434	if (have_monotonic)	702	/* adjust periodics after time jump */
		703	for (i = 0; i < periodiccnt; ++i)
435	{	704	{
436	ev_tstamp odiff = diff;	705	struct ev_periodic *w = periodics [i];
437		706
438	/* detecting time jumps is much more difficult */	707	if (w->interval)
439	for (i = 2; --i; ) /* loop a few times, before making important decisions */
440	{	708	{
441	now = get_clock ();	709	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
442	diff = ev_now - now;
443		710
444	if (fabs (odiff - diff) < MIN_TIMEJUMP)	711	if (fabs (diff) >= 1e-4)
445	return; /* all is well */	712	{
		713	ev_periodic_stop (w);
		714	ev_periodic_start (w);
446		715
447	ev_now = ev_time ();	716	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		717	}
448	}	718	}
		719	}
		720	}
449		721
450	/* time jump detected, reschedule atimers */	722	static int
451	for (i = 0; i < atimercnt; ++i)	723	time_update_monotonic (void)
		724	{
		725	now = get_clock ();
		726
		727	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
		728	{
		729	ev_now = now + diff;
		730	return 0;
		731	}
		732	else
		733	{
		734	now_floor = now;
		735	ev_now = ev_time ();
		736	return 1;
		737	}
		738	}
		739
		740	static void
		741	time_update (void)
		742	{
		743	int i;
		744
		745	#if EV_USE_MONOTONIC
		746	if (expect_true (have_monotonic))
		747	{
		748	if (time_update_monotonic ())
452	{	749	{
453	struct ev_timer *w = atimers [i];	750	ev_tstamp odiff = diff;
454	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	751
		752	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		753	{
		754	diff = ev_now - now;
		755
		756	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		757	return; /* all is well */
		758
		759	ev_now = ev_time ();
		760	now = get_clock ();
		761	now_floor = now;
		762	}
		763
		764	periodics_reschedule (diff - odiff);
		765	/* no timer adjustment, as the monotonic clock doesn't jump */
455	}	766	}
456	}	767	}
457	else	768	else
		769	#endif
458	{	770	{
		771	ev_now = ev_time ();
		772
459	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	773	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
460	/* time jump detected, adjust rtimers */	774	{
		775	periodics_reschedule (ev_now - now);
		776
		777	/* adjust timers. this is easy, as the offset is the same for all */
461	for (i = 0; i < rtimercnt; ++i)	778	for (i = 0; i < timercnt; ++i)
462	rtimers [i]->at += ev_now - now;	779	timers [i]->at += diff;
		780	}
463		781
464	now = ev_now;	782	now = ev_now;
465	}	783	}
466	}	784	}
467		785
468	int ev_loop_done;	786	int ev_loop_done;
469		787
470	void ev_loop (int flags)	788	void ev_loop (int flags)
471	{	789	{
472	double block;	790	double block;
473	ev_loop_done = flags & EVLOOP_ONESHOT;	791	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
474		792
475	do	793	do
476	{	794	{
477	hook_call (EVHOOK_PREPOLL);	795	/* queue check watchers (and execute them) */
		796	if (expect_false (preparecnt))
		797	{
		798	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		799	call_pending ();
		800	}
478		801
479	/* update fd-related kernel structures */	802	/* update fd-related kernel structures */
480	fd_reify ();	803	fd_reify ();
481		804
482	/* calculate blocking time */	805	/* calculate blocking time */
		806
		807	/* we only need this for !monotonic clockor timers, but as we basically
		808	always have timers, we just calculate it always */
		809	#if EV_USE_MONOTONIC
		810	if (expect_true (have_monotonic))
		811	time_update_monotonic ();
		812	else
		813	#endif
		814	{
		815	ev_now = ev_time ();
		816	now = ev_now;
		817	}
		818
483	if (flags & EVLOOP_NONBLOCK)	819	if (flags & EVLOOP_NONBLOCK || idlecnt)
484	block = 0.;	820	block = 0.;
485	else	821	else
486	{	822	{
487	block = MAX_BLOCKTIME;	823	block = MAX_BLOCKTIME;
488		824
489	if (rtimercnt)	825	if (timercnt)
490	{	826	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	827	ev_tstamp to = timers [0]->at - now + method_fudge;
492	if (block > to) block = to;	828	if (block > to) block = to;
493	}	829	}
494		830
495	if (atimercnt)	831	if (periodiccnt)
496	{	832	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	833	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
498	if (block > to) block = to;	834	if (block > to) block = to;
499	}	835	}
500		836
501	if (block < 0.) block = 0.;	837	if (block < 0.) block = 0.;
502	}	838	}
…		…
504	method_poll (block);	840	method_poll (block);
505		841
506	/* update ev_now, do magic */	842	/* update ev_now, do magic */
507	time_update ();	843	time_update ();
508		844
509	hook_call (EVHOOK_POSTPOLL);
510
511	/* put pending timers into pendign queue and reschedule them */	845	/* queue pending timers and reschedule them */
512	/* absolute timers first */	846	timers_reify (); /* relative timers called last */
513	timers_reify (atimers, atimercnt, ev_now);	847	periodics_reify (); /* absolute timers called first */
514	/* relative timers second */	848
515	timers_reify (rtimers, rtimercnt, now);	849	/* queue idle watchers unless io or timers are pending */
		850	if (!pendingcnt)
		851	queue_events ((W *)idles, idlecnt, EV_IDLE);
		852
		853	/* queue check watchers, to be executed first */
		854	if (checkcnt)
		855	queue_events ((W *)checks, checkcnt, EV_CHECK);
516		856
517	call_pending ();	857	call_pending ();
518	}	858	}
519	while (!ev_loop_done);	859	while (!ev_loop_done);
		860
		861	if (ev_loop_done != 2)
		862	ev_loop_done = 0;
520	}	863	}
521		864
522	/*****************************************************************************/	865	/*****************************************************************************/
523		866
524	static void	867	static void
525	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	868	wlist_add (WL *head, WL elem)
526	{	869	{
527	elem->next = *head;	870	elem->next = *head;
528	*head = elem;	871	*head = elem;
529	}	872	}
530		873
531	static void	874	static void
532	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	875	wlist_del (WL *head, WL elem)
533	{	876	{
534	while (*head)	877	while (*head)
535	{	878	{
536	if (*head == elem)	879	if (*head == elem)
537	{	880	{
…		…
542	head = &(*head)->next;	885	head = &(*head)->next;
543	}	886	}
544	}	887	}
545		888
546	static void	889	static void
547	ev_start (struct ev_watcher *w, int active)	890	ev_clear_pending (W w)
548	{	891	{
		892	if (w->pending)
		893	{
		894	pendings [ABSPRI (w)][w->pending - 1].w = 0;
549	w->pending = 0;	895	w->pending = 0;
		896	}
		897	}
		898
		899	static void
		900	ev_start (W w, int active)
		901	{
		902	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		903	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		904
550	w->active = active;	905	w->active = active;
551	}	906	}
552		907
553	static void	908	static void
554	ev_stop (struct ev_watcher *w)	909	ev_stop (W w)
555	{	910	{
556	if (w->pending)
557	pendings [w->pending - 1].w = 0;
558
559	w->active = 0;	911	w->active = 0;
560	/* nop */
561	}	912	}
562		913
563	/*****************************************************************************/	914	/*****************************************************************************/
564		915
565	void	916	void
566	evio_start (struct ev_io *w)	917	ev_io_start (struct ev_io *w)
567	{	918	{
		919	int fd = w->fd;
		920
568	if (ev_is_active (w))	921	if (ev_is_active (w))
569	return;	922	return;
570		923
571	int fd = w->fd;	924	assert (("ev_io_start called with negative fd", fd >= 0));
572		925
573	ev_start ((struct ev_watcher *)w, 1);	926	ev_start ((W)w, 1);
574	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	927	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
575	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	928	wlist_add ((WL *)&anfds[fd].head, (WL)w);
576		929
577	++fdchangecnt;	930	fd_change (fd);
578	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
579	fdchanges [fdchangecnt - 1] = fd;
580	}	931	}
581		932
582	void	933	void
583	evio_stop (struct ev_io *w)	934	ev_io_stop (struct ev_io *w)
584	{	935	{
		936	ev_clear_pending ((W)w);
585	if (!ev_is_active (w))	937	if (!ev_is_active (w))
586	return;	938	return;
587		939
588	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	940	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
589	ev_stop ((struct ev_watcher *)w);	941	ev_stop ((W)w);
590		942
591	++fdchangecnt;	943	fd_change (w->fd);
592	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
593	fdchanges [fdchangecnt - 1] = w->fd;
594	}	944	}
595		945
596	void	946	void
597	evtimer_start (struct ev_timer *w)	947	ev_timer_start (struct ev_timer *w)
598	{	948	{
599	if (ev_is_active (w))	949	if (ev_is_active (w))
600	return;	950	return;
601		951
602	if (w->is_abs)	952	w->at += now;
		953
		954	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		955
		956	ev_start ((W)w, ++timercnt);
		957	array_needsize (timers, timermax, timercnt, );
		958	timers [timercnt - 1] = w;
		959	upheap ((WT *)timers, timercnt - 1);
		960	}
		961
		962	void
		963	ev_timer_stop (struct ev_timer *w)
		964	{
		965	ev_clear_pending ((W)w);
		966	if (!ev_is_active (w))
		967	return;
		968
		969	if (w->active < timercnt--)
		970	{
		971	timers [w->active - 1] = timers [timercnt];
		972	downheap ((WT *)timers, timercnt, w->active - 1);
603	{	973	}
604	/* this formula differs from the one in timer_reify becuse we do not round up */	974
		975	w->at = w->repeat;
		976
		977	ev_stop ((W)w);
		978	}
		979
		980	void
		981	ev_timer_again (struct ev_timer *w)
		982	{
		983	if (ev_is_active (w))
		984	{
605	if (w->repeat)	985	if (w->repeat)
		986	{
		987	w->at = now + w->repeat;
		988	downheap ((WT *)timers, timercnt, w->active - 1);
		989	}
		990	else
		991	ev_timer_stop (w);
		992	}
		993	else if (w->repeat)
		994	ev_timer_start (w);
		995	}
		996
		997	void
		998	ev_periodic_start (struct ev_periodic *w)
		999	{
		1000	if (ev_is_active (w))
		1001	return;
		1002
		1003	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1004
		1005	/* this formula differs from the one in periodic_reify because we do not always round up */
		1006	if (w->interval)
606	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1007	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
607		1008
608	ev_start ((struct ev_watcher *)w, ++atimercnt);	1009	ev_start ((W)w, ++periodiccnt);
609	array_needsize (atimers, atimermax, atimercnt, );	1010	array_needsize (periodics, periodicmax, periodiccnt, );
610	atimers [atimercnt - 1] = w;	1011	periodics [periodiccnt - 1] = w;
611	upheap (atimers, atimercnt - 1);	1012	upheap ((WT *)periodics, periodiccnt - 1);
612	}
613	else
614	{
615	w->at += now;
616
617	ev_start ((struct ev_watcher *)w, ++rtimercnt);
618	array_needsize (rtimers, rtimermax, rtimercnt, );
619	rtimers [rtimercnt - 1] = w;
620	upheap (rtimers, rtimercnt - 1);
621	}
622
623	}	1013	}
624		1014
625	void	1015	void
626	evtimer_stop (struct ev_timer *w)	1016	ev_periodic_stop (struct ev_periodic *w)
627	{	1017	{
		1018	ev_clear_pending ((W)w);
628	if (!ev_is_active (w))	1019	if (!ev_is_active (w))
629	return;	1020	return;
630		1021
631	if (w->is_abs)
632	{
633	if (w->active < atimercnt--)	1022	if (w->active < periodiccnt--)
634	{
635	atimers [w->active - 1] = atimers [atimercnt];
636	downheap (atimers, atimercnt, w->active - 1);
637	}
638	}	1023	{
639	else	1024	periodics [w->active - 1] = periodics [periodiccnt];
		1025	downheap ((WT *)periodics, periodiccnt, w->active - 1);
640	{	1026	}
641	if (w->active < rtimercnt--)
642	{
643	rtimers [w->active - 1] = rtimers [rtimercnt];
644	downheap (rtimers, rtimercnt, w->active - 1);
645	}
646	}
647		1027
648	ev_stop ((struct ev_watcher *)w);	1028	ev_stop ((W)w);
649	}	1029	}
650		1030
		1031	#ifndef SA_RESTART
		1032	# define SA_RESTART 0
		1033	#endif
		1034
651	void	1035	void
652	evsignal_start (struct ev_signal *w)	1036	ev_signal_start (struct ev_signal *w)
653	{	1037	{
654	if (ev_is_active (w))	1038	if (ev_is_active (w))
655	return;	1039	return;
656		1040
657	ev_start ((struct ev_watcher *)w, 1);	1041	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1042
		1043	ev_start ((W)w, 1);
658	array_needsize (signals, signalmax, w->signum, signals_init);	1044	array_needsize (signals, signalmax, w->signum, signals_init);
659	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1045	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
660		1046
661	if (!w->next)	1047	if (!w->next)
662	{	1048	{
663	struct sigaction sa;	1049	struct sigaction sa;
664	sa.sa_handler = sighandler;	1050	sa.sa_handler = sighandler;
665	sigfillset (&sa.sa_mask);	1051	sigfillset (&sa.sa_mask);
666	sa.sa_flags = 0;	1052	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
667	sigaction (w->signum, &sa, 0);	1053	sigaction (w->signum, &sa, 0);
668	}	1054	}
669	}	1055	}
670		1056
671	void	1057	void
672	evsignal_stop (struct ev_signal *w)	1058	ev_signal_stop (struct ev_signal *w)
673	{	1059	{
		1060	ev_clear_pending ((W)w);
674	if (!ev_is_active (w))	1061	if (!ev_is_active (w))
675	return;	1062	return;
676		1063
677	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1064	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
678	ev_stop ((struct ev_watcher *)w);	1065	ev_stop ((W)w);
679		1066
680	if (!signals [w->signum - 1].head)	1067	if (!signals [w->signum - 1].head)
681	signal (w->signum, SIG_DFL);	1068	signal (w->signum, SIG_DFL);
682	}	1069	}
683		1070
		1071	void
		1072	ev_idle_start (struct ev_idle *w)
		1073	{
		1074	if (ev_is_active (w))
		1075	return;
		1076
		1077	ev_start ((W)w, ++idlecnt);
		1078	array_needsize (idles, idlemax, idlecnt, );
		1079	idles [idlecnt - 1] = w;
		1080	}
		1081
		1082	void
		1083	ev_idle_stop (struct ev_idle *w)
		1084	{
		1085	ev_clear_pending ((W)w);
		1086	if (ev_is_active (w))
		1087	return;
		1088
		1089	idles [w->active - 1] = idles [--idlecnt];
		1090	ev_stop ((W)w);
		1091	}
		1092
		1093	void
		1094	ev_prepare_start (struct ev_prepare *w)
		1095	{
		1096	if (ev_is_active (w))
		1097	return;
		1098
		1099	ev_start ((W)w, ++preparecnt);
		1100	array_needsize (prepares, preparemax, preparecnt, );
		1101	prepares [preparecnt - 1] = w;
		1102	}
		1103
		1104	void
		1105	ev_prepare_stop (struct ev_prepare *w)
		1106	{
		1107	ev_clear_pending ((W)w);
		1108	if (ev_is_active (w))
		1109	return;
		1110
		1111	prepares [w->active - 1] = prepares [--preparecnt];
		1112	ev_stop ((W)w);
		1113	}
		1114
		1115	void
		1116	ev_check_start (struct ev_check *w)
		1117	{
		1118	if (ev_is_active (w))
		1119	return;
		1120
		1121	ev_start ((W)w, ++checkcnt);
		1122	array_needsize (checks, checkmax, checkcnt, );
		1123	checks [checkcnt - 1] = w;
		1124	}
		1125
		1126	void
		1127	ev_check_stop (struct ev_check *w)
		1128	{
		1129	ev_clear_pending ((W)w);
		1130	if (ev_is_active (w))
		1131	return;
		1132
		1133	checks [w->active - 1] = checks [--checkcnt];
		1134	ev_stop ((W)w);
		1135	}
		1136
		1137	void
		1138	ev_child_start (struct ev_child *w)
		1139	{
		1140	if (ev_is_active (w))
		1141	return;
		1142
		1143	ev_start ((W)w, 1);
		1144	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1145	}
		1146
		1147	void
		1148	ev_child_stop (struct ev_child *w)
		1149	{
		1150	ev_clear_pending ((W)w);
		1151	if (ev_is_active (w))
		1152	return;
		1153
		1154	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1155	ev_stop ((W)w);
		1156	}
		1157
684	/*****************************************************************************/	1158	/*****************************************************************************/
		1159
		1160	struct ev_once
		1161	{
		1162	struct ev_io io;
		1163	struct ev_timer to;
		1164	void (*cb)(int revents, void *arg);
		1165	void *arg;
		1166	};
		1167
		1168	static void
		1169	once_cb (struct ev_once *once, int revents)
		1170	{
		1171	void (*cb)(int revents, void *arg) = once->cb;
		1172	void *arg = once->arg;
		1173
		1174	ev_io_stop (&once->io);
		1175	ev_timer_stop (&once->to);
		1176	free (once);
		1177
		1178	cb (revents, arg);
		1179	}
		1180
		1181	static void
		1182	once_cb_io (struct ev_io *w, int revents)
		1183	{
		1184	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1185	}
		1186
		1187	static void
		1188	once_cb_to (struct ev_timer *w, int revents)
		1189	{
		1190	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1191	}
		1192
		1193	void
		1194	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1195	{
		1196	struct ev_once *once = malloc (sizeof (struct ev_once));
		1197
		1198	if (!once)
		1199	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1200	else
		1201	{
		1202	once->cb = cb;
		1203	once->arg = arg;
		1204
		1205	ev_watcher_init (&once->io, once_cb_io);
		1206	if (fd >= 0)
		1207	{
		1208	ev_io_set (&once->io, fd, events);
		1209	ev_io_start (&once->io);
		1210	}
		1211
		1212	ev_watcher_init (&once->to, once_cb_to);
		1213	if (timeout >= 0.)
		1214	{
		1215	ev_timer_set (&once->to, timeout, 0.);
		1216	ev_timer_start (&once->to);
		1217	}
		1218	}
		1219	}
		1220
		1221	/*****************************************************************************/
		1222
685	#if 1	1223	#if 0
		1224
		1225	struct ev_io wio;
686		1226
687	static void	1227	static void
688	sin_cb (struct ev_io *w, int revents)	1228	sin_cb (struct ev_io *w, int revents)
689	{	1229	{
690	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1230	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
692		1232
693	static void	1233	static void
694	ocb (struct ev_timer *w, int revents)	1234	ocb (struct ev_timer *w, int revents)
695	{	1235	{
696	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1236	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
697	evtimer_stop (w);	1237	ev_timer_stop (w);
698	evtimer_start (w);	1238	ev_timer_start (w);
699	}	1239	}
700		1240
701	static void	1241	static void
702	scb (struct ev_signal *w, int revents)	1242	scb (struct ev_signal *w, int revents)
703	{	1243	{
704	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1244	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1245	ev_io_stop (&wio);
		1246	ev_io_start (&wio);
		1247	}
		1248
		1249	static void
		1250	gcb (struct ev_signal *w, int revents)
		1251	{
		1252	fprintf (stderr, "generic %x\n", revents);
		1253
705	}	1254	}
706		1255
707	int main (void)	1256	int main (void)
708	{	1257	{
709	struct ev_io sin;
710
711	ev_init (0);	1258	ev_init (0);
712		1259
713	evw_init (&sin, sin_cb, 55);
714	evio_set (&sin, 0, EV_READ);	1260	ev_io_init (&wio, sin_cb, 0, EV_READ);
715	evio_start (&sin);	1261	ev_io_start (&wio);
716		1262
717	struct ev_timer t[10000];	1263	struct ev_timer t[10000];
718		1264
719	#if 1	1265	#if 0
720	int i;	1266	int i;
721	for (i = 0; i < 10000; ++i)	1267	for (i = 0; i < 10000; ++i)
722	{	1268	{
723	struct ev_timer *w = t + i;	1269	struct ev_timer *w = t + i;
724	evw_init (w, ocb, i);	1270	ev_watcher_init (w, ocb, i);
725	evtimer_set_abs (w, drand48 (), 0.99775533);	1271	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
726	evtimer_start (w);	1272	ev_timer_start (w);
727	if (drand48 () < 0.5)	1273	if (drand48 () < 0.5)
728	evtimer_stop (w);	1274	ev_timer_stop (w);
729	}	1275	}
730	#endif	1276	#endif
731		1277
732	struct ev_timer t1;	1278	struct ev_timer t1;
733	evw_init (&t1, ocb, 0);	1279	ev_timer_init (&t1, ocb, 5, 10);
734	evtimer_set_abs (&t1, 5, 10);
735	evtimer_start (&t1);	1280	ev_timer_start (&t1);
736		1281
737	struct ev_signal sig;	1282	struct ev_signal sig;
738	evw_init (&sig, scb, 65535);
739	evsignal_set (&sig, SIGQUIT);	1283	ev_signal_init (&sig, scb, SIGQUIT);
740	evsignal_start (&sig);	1284	ev_signal_start (&sig);
		1285
		1286	struct ev_check cw;
		1287	ev_check_init (&cw, gcb);
		1288	ev_check_start (&cw);
		1289
		1290	struct ev_idle iw;
		1291	ev_idle_init (&iw, gcb);
		1292	ev_idle_start (&iw);
741		1293
742	ev_loop (0);	1294	ev_loop (0);
743		1295
744	return 0;	1296	return 0;
745	}	1297	}

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