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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 1.50 by root, Sat Nov 3 19:41:55 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	#ifndef EV_STANDALONE
		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_watcher_list *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 = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)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 = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)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	while ((w = (struct ev_io *)anfds [fd].head))
		301	{
		302	ev_io_stop (w);
		303	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);
		304	}
		305	}
		306
		307	/* called on EBADF to verify fds */
		308	static void
		309	fd_ebadf (void)
		310	{
		311	int fd;
		312
		313	for (fd = 0; fd < anfdmax; ++fd)
		314	if (anfds [fd].events)
		315	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		316	fd_kill (fd);
		317	}
		318
		319	/* called on ENOMEM in select/poll to kill some fds and retry */
		320	static void
		321	fd_enomem (void)
		322	{
		323	int fd = anfdmax;
		324
		325	while (fd--)
		326	if (anfds [fd].events)
136	{	327	{
137	int ev = w->events & events;	328	close (fd);
138		329	fd_kill (fd);
139	if (ev)	330	return;
140	event ((struct ev_watcher *)w, ev);
141	}	331	}
142	}	332	}
143		333
144	/*****************************************************************************/	334	/*****************************************************************************/
145		335
146	static struct ev_timer **atimers;	336	static struct ev_timer **timers;
147	static int atimermax, atimercnt;	337	static int timermax, timercnt;
148		338
149	static struct ev_timer **rtimers;	339	static struct ev_periodic **periodics;
150	static int rtimermax, rtimercnt;	340	static int periodicmax, periodiccnt;
151		341
152	static void	342	static void
153	upheap (struct ev_timer **timers, int k)	343	upheap (WT *timers, int k)
154	{	344	{
155	struct ev_timer *w = timers [k];	345	WT w = timers [k];
156		346
157	while (k && timers [k >> 1]->at > w->at)	347	while (k && timers [k >> 1]->at > w->at)
158	{	348	{
159	timers [k] = timers [k >> 1];	349	timers [k] = timers [k >> 1];
160	timers [k]->active = k + 1;	350	timers [k]->active = k + 1;
…		…
165	timers [k]->active = k + 1;	355	timers [k]->active = k + 1;
166		356
167	}	357	}
168		358
169	static void	359	static void
170	downheap (struct ev_timer **timers, int N, int k)	360	downheap (WT *timers, int N, int k)
171	{	361	{
172	struct ev_timer *w = timers [k];	362	WT w = timers [k];
173		363
174	while (k < (N >> 1))	364	while (k < (N >> 1))
175	{	365	{
176	int j = k << 1;	366	int j = k << 1;
177		367
…		…
192		382
193	/*****************************************************************************/	383	/*****************************************************************************/
194		384
195	typedef struct	385	typedef struct
196	{	386	{
197	struct ev_signal *head;	387	struct ev_watcher_list *head;
198	sig_atomic_t gotsig;	388	sig_atomic_t volatile gotsig;
199	} ANSIG;	389	} ANSIG;
200		390
201	static ANSIG *signals;	391	static ANSIG *signals;
202	static int signalmax;	392	static int signalmax;
203		393
204	static int sigpipe [2];	394	static int sigpipe [2];
205	static sig_atomic_t gotsig;	395	static sig_atomic_t volatile gotsig;
206	static struct ev_io sigev;	396	static struct ev_io sigev;
207		397
208	static void	398	static void
209	signals_init (ANSIG *base, int count)	399	signals_init (ANSIG *base, int count)
210	{	400	{
211	while (count--)	401	while (count--)
212	{	402	{
213	base->head = 0;	403	base->head = 0;
214	base->gotsig = 0;	404	base->gotsig = 0;
		405
215	++base;	406	++base;
216	}	407	}
217	}	408	}
218		409
219	static void	410	static void
…		…
221	{	412	{
222	signals [signum - 1].gotsig = 1;	413	signals [signum - 1].gotsig = 1;
223		414
224	if (!gotsig)	415	if (!gotsig)
225	{	416	{
		417	int old_errno = errno;
226	gotsig = 1;	418	gotsig = 1;
227	write (sigpipe [1], &gotsig, 1);	419	write (sigpipe [1], &signum, 1);
		420	errno = old_errno;
228	}	421	}
229	}	422	}
230		423
231	static void	424	static void
232	sigcb (struct ev_io *iow, int revents)	425	sigcb (struct ev_io *iow, int revents)
233	{	426	{
234	struct ev_signal *w;	427	struct ev_watcher_list *w;
235	int sig;	428	int signum;
236		429
		430	read (sigpipe [0], &revents, 1);
237	gotsig = 0;	431	gotsig = 0;
238	read (sigpipe [0], &revents, 1);
239		432
240	for (sig = signalmax; sig--; )	433	for (signum = signalmax; signum--; )
241	if (signals [sig].gotsig)	434	if (signals [signum].gotsig)
242	{	435	{
243	signals [sig].gotsig = 0;	436	signals [signum].gotsig = 0;
244		437
245	for (w = signals [sig].head; w; w = w->next)	438	for (w = signals [signum].head; w; w = w->next)
246	event ((struct ev_watcher *)w, EV_SIGNAL);	439	event ((W)w, EV_SIGNAL);
247	}	440	}
248	}	441	}
249		442
250	static void	443	static void
251	siginit (void)	444	siginit (void)
252	{	445	{
		446	#ifndef WIN32
253	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	447	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
254	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	448	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
255		449
256	/* rather than sort out wether we really need nb, set it */	450	/* rather than sort out wether we really need nb, set it */
257	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	451	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
258	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	452	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		453	#endif
259		454
260	evio_set (&sigev, sigpipe [0], EV_READ);	455	ev_io_set (&sigev, sigpipe [0], EV_READ);
261	evio_start (&sigev);	456	ev_io_start (&sigev);
262	}	457	}
263		458
264	/*****************************************************************************/	459	/*****************************************************************************/
265		460
		461	static struct ev_idle **idles;
		462	static int idlemax, idlecnt;
		463
		464	static struct ev_prepare **prepares;
		465	static int preparemax, preparecnt;
		466
		467	static struct ev_check **checks;
		468	static int checkmax, checkcnt;
		469
		470	/*****************************************************************************/
		471
		472	static struct ev_child *childs [PID_HASHSIZE];
		473	static struct ev_signal childev;
		474
		475	#ifndef WIN32
		476
		477	#ifndef WCONTINUED
		478	# define WCONTINUED 0
		479	#endif
		480
		481	static void
		482	child_reap (struct ev_signal *sw, int chain, int pid, int status)
		483	{
		484	struct ev_child *w;
		485
		486	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		487	if (w->pid == pid || !w->pid)
		488	{
		489	w->priority = sw->priority; /* need to do it *now* */
		490	w->rpid = pid;
		491	w->rstatus = status;
		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	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		502	{
		503	/* make sure we are called again until all childs have been reaped */
		504	event ((W)sw, EV_SIGNAL);
		505
		506	child_reap (sw, pid, pid, status);
		507	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		508	}
		509	}
		510
		511	#endif
		512
		513	/*****************************************************************************/
		514
		515	#if EV_USE_KQUEUE
		516	# include "ev_kqueue.c"
		517	#endif
266	#if HAVE_EPOLL	518	#if EV_USE_EPOLL
267	# include "ev_epoll.c"	519	# include "ev_epoll.c"
268	#endif	520	#endif
		521	#if EV_USE_POLL
		522	# include "ev_poll.c"
		523	#endif
269	#if HAVE_SELECT	524	#if EV_USE_SELECT
270	# include "ev_select.c"	525	# include "ev_select.c"
271	#endif	526	#endif
272		527
273	int ev_init (int flags)	528	int
		529	ev_version_major (void)
274	{	530	{
275	#if HAVE_MONOTONIC	531	return EV_VERSION_MAJOR;
276	{	532	}
277	struct timespec ts;
278	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
279	have_monotonic = 1;
280	}
281	#endif
282		533
283	ev_now = ev_time ();	534	int
284	now = get_clock ();	535	ev_version_minor (void)
285	diff = ev_now - now;	536	{
		537	return EV_VERSION_MINOR;
		538	}
286		539
287	if (pipe (sigpipe))	540	/* return true if we are running with elevated privileges and should ignore env variables */
		541	static int
		542	enable_secure ()
		543	{
		544	#ifdef WIN32
288	return 0;	545	return 0;
289		546	#else
290	ev_method = EVMETHOD_NONE;	547	return getuid () != geteuid ()
291	#if HAVE_EPOLL	548	|| getgid () != getegid ();
292	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
293	#endif	549	#endif
294	#if HAVE_SELECT	550	}
295	if (ev_method == EVMETHOD_NONE) select_init (flags);
296	#endif
297		551
		552	int ev_init (int methods)
		553	{
298	if (ev_method)	554	if (!ev_method)
		555	{
		556	#if EV_USE_MONOTONIC
299	{	557	{
		558	struct timespec ts;
		559	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		560	have_monotonic = 1;
		561	}
		562	#endif
		563
		564	ev_now = ev_time ();
		565	now = get_clock ();
		566	now_floor = now;
		567	diff = ev_now - now;
		568
		569	if (pipe (sigpipe))
		570	return 0;
		571
		572	if (methods == EVMETHOD_AUTO)
		573	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		574	methods = atoi (getenv ("LIBEV_METHODS"));
		575	else
		576	methods = EVMETHOD_ANY;
		577
		578	ev_method = 0;
		579	#if EV_USE_KQUEUE
		580	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
		581	#endif
		582	#if EV_USE_EPOLL
		583	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
		584	#endif
		585	#if EV_USE_POLL
		586	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
		587	#endif
		588	#if EV_USE_SELECT
		589	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
		590	#endif
		591
		592	if (ev_method)
		593	{
300	evw_init (&sigev, sigcb, 0);	594	ev_watcher_init (&sigev, sigcb);
		595	ev_set_priority (&sigev, EV_MAXPRI);
301	siginit ();	596	siginit ();
		597
		598	#ifndef WIN32
		599	ev_signal_init (&childev, childcb, SIGCHLD);
		600	ev_set_priority (&childev, EV_MAXPRI);
		601	ev_signal_start (&childev);
		602	#endif
		603	}
302	}	604	}
303		605
304	return ev_method;	606	return ev_method;
305	}	607	}
306		608
307	/*****************************************************************************/	609	/*****************************************************************************/
308		610
309	void ev_prefork (void)	611	void
		612	ev_fork_prepare (void)
310	{	613	{
		614	/* nop */
311	}	615	}
312		616
		617	void
313	void ev_postfork_parent (void)	618	ev_fork_parent (void)
314	{	619	{
		620	/* nop */
315	}	621	}
316		622
		623	void
317	void ev_postfork_child (void)	624	ev_fork_child (void)
318	{	625	{
319	#if HAVE_EPOLL	626	#if EV_USE_EPOLL
320	if (ev_method == EVMETHOD_EPOLL)	627	if (ev_method == EVMETHOD_EPOLL)
321	epoll_postfork_child ();	628	epoll_postfork_child ();
322	#endif	629	#endif
323		630
324	evio_stop (&sigev);	631	ev_io_stop (&sigev);
325	close (sigpipe [0]);	632	close (sigpipe [0]);
326	close (sigpipe [1]);	633	close (sigpipe [1]);
327	pipe (sigpipe);	634	pipe (sigpipe);
328	siginit ();	635	siginit ();
329	}	636	}
330		637
331	/*****************************************************************************/	638	/*****************************************************************************/
332		639
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	640	static void
348	hook_call (int type)	641	call_pending (void)
349	{	642	{
350	if (hooks [type])
351	hooks [type] ();
352	}
353
354	static void
355	fd_reify (void)
356	{
357	int i;	643	int pri;
358		644
359	for (i = 0; i < fdchangecnt; ++i)	645	for (pri = NUMPRI; pri--; )
360	{	646	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	{	647	{
372	method_modify (fd, anfd->wev, wev);	648	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
373	anfd->wev = wev;
374	}
375	}
376		649
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)	650	if (p->w)
390	{	651	{
391	p->w->pending = 0;	652	p->w->pending = 0;
392	p->w->cb (p->w, p->events);	653	p->w->cb (p->w, p->events);
393	}	654	}
394	}	655	}
395
396	pendingcnt = 0;
397	}	656	}
398		657
399	static void	658	static void
400	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	659	timers_reify (void)
401	{	660	{
402	while (timercnt && timers [0]->at <= now)	661	while (timercnt && timers [0]->at <= now)
403	{	662	{
404	struct ev_timer *w = timers [0];	663	struct ev_timer *w = timers [0];
405		664
406	/* first reschedule or stop timer */	665	/* first reschedule or stop timer */
407	if (w->repeat)	666	if (w->repeat)
408	{	667	{
409	if (w->is_abs)	668	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;	669	w->at = now + w->repeat;
413
414	assert (w->at > now);
415
416	downheap (timers, timercnt, 0);	670	downheap ((WT *)timers, timercnt, 0);
417	}	671	}
418	else	672	else
		673	ev_timer_stop (w); /* nonrepeating: stop timer */
		674
		675	event ((W)w, EV_TIMEOUT);
		676	}
		677	}
		678
		679	static void
		680	periodics_reify (void)
		681	{
		682	while (periodiccnt && periodics [0]->at <= ev_now)
		683	{
		684	struct ev_periodic *w = periodics [0];
		685
		686	/* first reschedule or stop timer */
		687	if (w->interval)
419	{	688	{
420	evtimer_stop (w); /* nonrepeating: stop timer */	689	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
421	--timercnt; /* maybe pass by reference instead? */	690	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));
		691	downheap ((WT *)periodics, periodiccnt, 0);
422	}	692	}
		693	else
		694	ev_periodic_stop (w); /* nonrepeating: stop timer */
423		695
424	event ((struct ev_watcher *)w, EV_TIMEOUT);	696	event ((W)w, EV_PERIODIC);
425	}	697	}
426	}	698	}
427		699
428	static void	700	static void
429	time_update ()	701	periodics_reschedule (ev_tstamp diff)
430	{	702	{
431	int i;	703	int i;
432	ev_now = ev_time ();
433		704
434	if (have_monotonic)	705	/* adjust periodics after time jump */
		706	for (i = 0; i < periodiccnt; ++i)
435	{	707	{
436	ev_tstamp odiff = diff;	708	struct ev_periodic *w = periodics [i];
437		709
438	/* detecting time jumps is much more difficult */	710	if (w->interval)
439	for (i = 2; --i; ) /* loop a few times, before making important decisions */
440	{	711	{
441	now = get_clock ();	712	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
442	diff = ev_now - now;
443		713
444	if (fabs (odiff - diff) < MIN_TIMEJUMP)	714	if (fabs (diff) >= 1e-4)
445	return; /* all is well */	715	{
		716	ev_periodic_stop (w);
		717	ev_periodic_start (w);
446		718
447	ev_now = ev_time ();	719	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		720	}
448	}	721	}
		722	}
		723	}
449		724
450	/* time jump detected, reschedule atimers */	725	static int
451	for (i = 0; i < atimercnt; ++i)	726	time_update_monotonic (void)
		727	{
		728	now = get_clock ();
		729
		730	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
		731	{
		732	ev_now = now + diff;
		733	return 0;
		734	}
		735	else
		736	{
		737	now_floor = now;
		738	ev_now = ev_time ();
		739	return 1;
		740	}
		741	}
		742
		743	static void
		744	time_update (void)
		745	{
		746	int i;
		747
		748	#if EV_USE_MONOTONIC
		749	if (expect_true (have_monotonic))
		750	{
		751	if (time_update_monotonic ())
452	{	752	{
453	struct ev_timer *w = atimers [i];	753	ev_tstamp odiff = diff;
454	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	754
		755	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		756	{
		757	diff = ev_now - now;
		758
		759	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		760	return; /* all is well */
		761
		762	ev_now = ev_time ();
		763	now = get_clock ();
		764	now_floor = now;
		765	}
		766
		767	periodics_reschedule (diff - odiff);
		768	/* no timer adjustment, as the monotonic clock doesn't jump */
455	}	769	}
456	}	770	}
457	else	771	else
		772	#endif
458	{	773	{
		774	ev_now = ev_time ();
		775
459	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	776	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
460	/* time jump detected, adjust rtimers */	777	{
		778	periodics_reschedule (ev_now - now);
		779
		780	/* adjust timers. this is easy, as the offset is the same for all */
461	for (i = 0; i < rtimercnt; ++i)	781	for (i = 0; i < timercnt; ++i)
462	rtimers [i]->at += ev_now - now;	782	timers [i]->at += diff;
		783	}
463		784
464	now = ev_now;	785	now = ev_now;
465	}	786	}
466	}	787	}
467		788
468	int ev_loop_done;	789	int ev_loop_done;
469		790
470	void ev_loop (int flags)	791	void ev_loop (int flags)
471	{	792	{
472	double block;	793	double block;
473	ev_loop_done = flags & EVLOOP_ONESHOT;	794	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
474		795
475	do	796	do
476	{	797	{
477	hook_call (EVHOOK_PREPOLL);	798	/* queue check watchers (and execute them) */
		799	if (expect_false (preparecnt))
		800	{
		801	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		802	call_pending ();
		803	}
478		804
479	/* update fd-related kernel structures */	805	/* update fd-related kernel structures */
480	fd_reify ();	806	fd_reify ();
481		807
482	/* calculate blocking time */	808	/* calculate blocking time */
		809
		810	/* we only need this for !monotonic clockor timers, but as we basically
		811	always have timers, we just calculate it always */
		812	#if EV_USE_MONOTONIC
		813	if (expect_true (have_monotonic))
		814	time_update_monotonic ();
		815	else
		816	#endif
		817	{
		818	ev_now = ev_time ();
		819	now = ev_now;
		820	}
		821
483	if (flags & EVLOOP_NONBLOCK)	822	if (flags & EVLOOP_NONBLOCK || idlecnt)
484	block = 0.;	823	block = 0.;
485	else	824	else
486	{	825	{
487	block = MAX_BLOCKTIME;	826	block = MAX_BLOCKTIME;
488		827
489	if (rtimercnt)	828	if (timercnt)
490	{	829	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	830	ev_tstamp to = timers [0]->at - now + method_fudge;
492	if (block > to) block = to;	831	if (block > to) block = to;
493	}	832	}
494		833
495	if (atimercnt)	834	if (periodiccnt)
496	{	835	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	836	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
498	if (block > to) block = to;	837	if (block > to) block = to;
499	}	838	}
500		839
501	if (block < 0.) block = 0.;	840	if (block < 0.) block = 0.;
502	}	841	}
…		…
504	method_poll (block);	843	method_poll (block);
505		844
506	/* update ev_now, do magic */	845	/* update ev_now, do magic */
507	time_update ();	846	time_update ();
508		847
509	hook_call (EVHOOK_POSTPOLL);
510
511	/* put pending timers into pendign queue and reschedule them */	848	/* queue pending timers and reschedule them */
512	/* absolute timers first */	849	timers_reify (); /* relative timers called last */
513	timers_reify (atimers, atimercnt, ev_now);	850	periodics_reify (); /* absolute timers called first */
514	/* relative timers second */	851
515	timers_reify (rtimers, rtimercnt, now);	852	/* queue idle watchers unless io or timers are pending */
		853	if (!pendingcnt)
		854	queue_events ((W *)idles, idlecnt, EV_IDLE);
		855
		856	/* queue check watchers, to be executed first */
		857	if (checkcnt)
		858	queue_events ((W *)checks, checkcnt, EV_CHECK);
516		859
517	call_pending ();	860	call_pending ();
518	}	861	}
519	while (!ev_loop_done);	862	while (!ev_loop_done);
		863
		864	if (ev_loop_done != 2)
		865	ev_loop_done = 0;
520	}	866	}
521		867
522	/*****************************************************************************/	868	/*****************************************************************************/
523		869
524	static void	870	static void
525	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	871	wlist_add (WL *head, WL elem)
526	{	872	{
527	elem->next = *head;	873	elem->next = *head;
528	*head = elem;	874	*head = elem;
529	}	875	}
530		876
531	static void	877	static void
532	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	878	wlist_del (WL *head, WL elem)
533	{	879	{
534	while (*head)	880	while (*head)
535	{	881	{
536	if (*head == elem)	882	if (*head == elem)
537	{	883	{
…		…
542	head = &(*head)->next;	888	head = &(*head)->next;
543	}	889	}
544	}	890	}
545		891
546	static void	892	static void
547	ev_start (struct ev_watcher *w, int active)	893	ev_clear_pending (W w)
548	{	894	{
		895	if (w->pending)
		896	{
		897	pendings [ABSPRI (w)][w->pending - 1].w = 0;
549	w->pending = 0;	898	w->pending = 0;
		899	}
		900	}
		901
		902	static void
		903	ev_start (W w, int active)
		904	{
		905	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		906	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		907
550	w->active = active;	908	w->active = active;
551	}	909	}
552		910
553	static void	911	static void
554	ev_stop (struct ev_watcher *w)	912	ev_stop (W w)
555	{	913	{
556	if (w->pending)
557	pendings [w->pending - 1].w = 0;
558
559	w->active = 0;	914	w->active = 0;
560	/* nop */
561	}	915	}
562		916
563	/*****************************************************************************/	917	/*****************************************************************************/
564		918
565	void	919	void
566	evio_start (struct ev_io *w)	920	ev_io_start (struct ev_io *w)
567	{	921	{
		922	int fd = w->fd;
		923
568	if (ev_is_active (w))	924	if (ev_is_active (w))
569	return;	925	return;
570		926
571	int fd = w->fd;	927	assert (("ev_io_start called with negative fd", fd >= 0));
572		928
573	ev_start ((struct ev_watcher *)w, 1);	929	ev_start ((W)w, 1);
574	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	930	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
575	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	931	wlist_add ((WL *)&anfds[fd].head, (WL)w);
576		932
577	++fdchangecnt;	933	fd_change (fd);
578	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
579	fdchanges [fdchangecnt - 1] = fd;
580	}	934	}
581		935
582	void	936	void
583	evio_stop (struct ev_io *w)	937	ev_io_stop (struct ev_io *w)
584	{	938	{
		939	ev_clear_pending ((W)w);
585	if (!ev_is_active (w))	940	if (!ev_is_active (w))
586	return;	941	return;
587		942
588	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	943	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
589	ev_stop ((struct ev_watcher *)w);	944	ev_stop ((W)w);
590		945
591	++fdchangecnt;	946	fd_change (w->fd);
592	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
593	fdchanges [fdchangecnt - 1] = w->fd;
594	}	947	}
595		948
596	void	949	void
597	evtimer_start (struct ev_timer *w)	950	ev_timer_start (struct ev_timer *w)
598	{	951	{
599	if (ev_is_active (w))	952	if (ev_is_active (w))
600	return;	953	return;
601		954
602	if (w->is_abs)	955	w->at += now;
		956
		957	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		958
		959	ev_start ((W)w, ++timercnt);
		960	array_needsize (timers, timermax, timercnt, );
		961	timers [timercnt - 1] = w;
		962	upheap ((WT *)timers, timercnt - 1);
		963	}
		964
		965	void
		966	ev_timer_stop (struct ev_timer *w)
		967	{
		968	ev_clear_pending ((W)w);
		969	if (!ev_is_active (w))
		970	return;
		971
		972	if (w->active < timercnt--)
		973	{
		974	timers [w->active - 1] = timers [timercnt];
		975	downheap ((WT *)timers, timercnt, w->active - 1);
603	{	976	}
604	/* this formula differs from the one in timer_reify becuse we do not round up */	977
		978	w->at = w->repeat;
		979
		980	ev_stop ((W)w);
		981	}
		982
		983	void
		984	ev_timer_again (struct ev_timer *w)
		985	{
		986	if (ev_is_active (w))
		987	{
605	if (w->repeat)	988	if (w->repeat)
		989	{
		990	w->at = now + w->repeat;
		991	downheap ((WT *)timers, timercnt, w->active - 1);
		992	}
		993	else
		994	ev_timer_stop (w);
		995	}
		996	else if (w->repeat)
		997	ev_timer_start (w);
		998	}
		999
		1000	void
		1001	ev_periodic_start (struct ev_periodic *w)
		1002	{
		1003	if (ev_is_active (w))
		1004	return;
		1005
		1006	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1007
		1008	/* this formula differs from the one in periodic_reify because we do not always round up */
		1009	if (w->interval)
606	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1010	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
607		1011
608	ev_start ((struct ev_watcher *)w, ++atimercnt);	1012	ev_start ((W)w, ++periodiccnt);
609	array_needsize (atimers, atimermax, atimercnt, );	1013	array_needsize (periodics, periodicmax, periodiccnt, );
610	atimers [atimercnt - 1] = w;	1014	periodics [periodiccnt - 1] = w;
611	upheap (atimers, atimercnt - 1);	1015	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	}	1016	}
624		1017
625	void	1018	void
626	evtimer_stop (struct ev_timer *w)	1019	ev_periodic_stop (struct ev_periodic *w)
627	{	1020	{
		1021	ev_clear_pending ((W)w);
628	if (!ev_is_active (w))	1022	if (!ev_is_active (w))
629	return;	1023	return;
630		1024
631	if (w->is_abs)
632	{
633	if (w->active < atimercnt--)	1025	if (w->active < periodiccnt--)
634	{
635	atimers [w->active - 1] = atimers [atimercnt];
636	downheap (atimers, atimercnt, w->active - 1);
637	}
638	}	1026	{
639	else	1027	periodics [w->active - 1] = periodics [periodiccnt];
		1028	downheap ((WT *)periodics, periodiccnt, w->active - 1);
640	{	1029	}
641	if (w->active < rtimercnt--)
642	{
643	rtimers [w->active - 1] = rtimers [rtimercnt];
644	downheap (rtimers, rtimercnt, w->active - 1);
645	}
646	}
647		1030
648	ev_stop ((struct ev_watcher *)w);	1031	ev_stop ((W)w);
649	}	1032	}
650		1033
		1034	#ifndef SA_RESTART
		1035	# define SA_RESTART 0
		1036	#endif
		1037
651	void	1038	void
652	evsignal_start (struct ev_signal *w)	1039	ev_signal_start (struct ev_signal *w)
653	{	1040	{
654	if (ev_is_active (w))	1041	if (ev_is_active (w))
655	return;	1042	return;
656		1043
657	ev_start ((struct ev_watcher *)w, 1);	1044	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1045
		1046	ev_start ((W)w, 1);
658	array_needsize (signals, signalmax, w->signum, signals_init);	1047	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);	1048	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
660		1049
661	if (!w->next)	1050	if (!w->next)
662	{	1051	{
663	struct sigaction sa;	1052	struct sigaction sa;
664	sa.sa_handler = sighandler;	1053	sa.sa_handler = sighandler;
665	sigfillset (&sa.sa_mask);	1054	sigfillset (&sa.sa_mask);
666	sa.sa_flags = 0;	1055	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
667	sigaction (w->signum, &sa, 0);	1056	sigaction (w->signum, &sa, 0);
668	}	1057	}
669	}	1058	}
670		1059
671	void	1060	void
672	evsignal_stop (struct ev_signal *w)	1061	ev_signal_stop (struct ev_signal *w)
673	{	1062	{
		1063	ev_clear_pending ((W)w);
674	if (!ev_is_active (w))	1064	if (!ev_is_active (w))
675	return;	1065	return;
676		1066
677	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1067	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
678	ev_stop ((struct ev_watcher *)w);	1068	ev_stop ((W)w);
679		1069
680	if (!signals [w->signum - 1].head)	1070	if (!signals [w->signum - 1].head)
681	signal (w->signum, SIG_DFL);	1071	signal (w->signum, SIG_DFL);
682	}	1072	}
683		1073
		1074	void
		1075	ev_idle_start (struct ev_idle *w)
		1076	{
		1077	if (ev_is_active (w))
		1078	return;
		1079
		1080	ev_start ((W)w, ++idlecnt);
		1081	array_needsize (idles, idlemax, idlecnt, );
		1082	idles [idlecnt - 1] = w;
		1083	}
		1084
		1085	void
		1086	ev_idle_stop (struct ev_idle *w)
		1087	{
		1088	ev_clear_pending ((W)w);
		1089	if (ev_is_active (w))
		1090	return;
		1091
		1092	idles [w->active - 1] = idles [--idlecnt];
		1093	ev_stop ((W)w);
		1094	}
		1095
		1096	void
		1097	ev_prepare_start (struct ev_prepare *w)
		1098	{
		1099	if (ev_is_active (w))
		1100	return;
		1101
		1102	ev_start ((W)w, ++preparecnt);
		1103	array_needsize (prepares, preparemax, preparecnt, );
		1104	prepares [preparecnt - 1] = w;
		1105	}
		1106
		1107	void
		1108	ev_prepare_stop (struct ev_prepare *w)
		1109	{
		1110	ev_clear_pending ((W)w);
		1111	if (ev_is_active (w))
		1112	return;
		1113
		1114	prepares [w->active - 1] = prepares [--preparecnt];
		1115	ev_stop ((W)w);
		1116	}
		1117
		1118	void
		1119	ev_check_start (struct ev_check *w)
		1120	{
		1121	if (ev_is_active (w))
		1122	return;
		1123
		1124	ev_start ((W)w, ++checkcnt);
		1125	array_needsize (checks, checkmax, checkcnt, );
		1126	checks [checkcnt - 1] = w;
		1127	}
		1128
		1129	void
		1130	ev_check_stop (struct ev_check *w)
		1131	{
		1132	ev_clear_pending ((W)w);
		1133	if (ev_is_active (w))
		1134	return;
		1135
		1136	checks [w->active - 1] = checks [--checkcnt];
		1137	ev_stop ((W)w);
		1138	}
		1139
		1140	void
		1141	ev_child_start (struct ev_child *w)
		1142	{
		1143	if (ev_is_active (w))
		1144	return;
		1145
		1146	ev_start ((W)w, 1);
		1147	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1148	}
		1149
		1150	void
		1151	ev_child_stop (struct ev_child *w)
		1152	{
		1153	ev_clear_pending ((W)w);
		1154	if (ev_is_active (w))
		1155	return;
		1156
		1157	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1158	ev_stop ((W)w);
		1159	}
		1160
684	/*****************************************************************************/	1161	/*****************************************************************************/
		1162
		1163	struct ev_once
		1164	{
		1165	struct ev_io io;
		1166	struct ev_timer to;
		1167	void (*cb)(int revents, void *arg);
		1168	void *arg;
		1169	};
		1170
		1171	static void
		1172	once_cb (struct ev_once *once, int revents)
		1173	{
		1174	void (*cb)(int revents, void *arg) = once->cb;
		1175	void *arg = once->arg;
		1176
		1177	ev_io_stop (&once->io);
		1178	ev_timer_stop (&once->to);
		1179	free (once);
		1180
		1181	cb (revents, arg);
		1182	}
		1183
		1184	static void
		1185	once_cb_io (struct ev_io *w, int revents)
		1186	{
		1187	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1188	}
		1189
		1190	static void
		1191	once_cb_to (struct ev_timer *w, int revents)
		1192	{
		1193	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1194	}
		1195
		1196	void
		1197	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1198	{
		1199	struct ev_once *once = malloc (sizeof (struct ev_once));
		1200
		1201	if (!once)
		1202	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1203	else
		1204	{
		1205	once->cb = cb;
		1206	once->arg = arg;
		1207
		1208	ev_watcher_init (&once->io, once_cb_io);
		1209	if (fd >= 0)
		1210	{
		1211	ev_io_set (&once->io, fd, events);
		1212	ev_io_start (&once->io);
		1213	}
		1214
		1215	ev_watcher_init (&once->to, once_cb_to);
		1216	if (timeout >= 0.)
		1217	{
		1218	ev_timer_set (&once->to, timeout, 0.);
		1219	ev_timer_start (&once->to);
		1220	}
		1221	}
		1222	}
		1223
		1224	/*****************************************************************************/
		1225
685	#if 1	1226	#if 0
		1227
		1228	struct ev_io wio;
686		1229
687	static void	1230	static void
688	sin_cb (struct ev_io *w, int revents)	1231	sin_cb (struct ev_io *w, int revents)
689	{	1232	{
690	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1233	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
692		1235
693	static void	1236	static void
694	ocb (struct ev_timer *w, int revents)	1237	ocb (struct ev_timer *w, int revents)
695	{	1238	{
696	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1239	//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);	1240	ev_timer_stop (w);
698	evtimer_start (w);	1241	ev_timer_start (w);
699	}	1242	}
700		1243
701	static void	1244	static void
702	scb (struct ev_signal *w, int revents)	1245	scb (struct ev_signal *w, int revents)
703	{	1246	{
704	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1247	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1248	ev_io_stop (&wio);
		1249	ev_io_start (&wio);
		1250	}
		1251
		1252	static void
		1253	gcb (struct ev_signal *w, int revents)
		1254	{
		1255	fprintf (stderr, "generic %x\n", revents);
		1256
705	}	1257	}
706		1258
707	int main (void)	1259	int main (void)
708	{	1260	{
709	struct ev_io sin;
710
711	ev_init (0);	1261	ev_init (0);
712		1262
713	evw_init (&sin, sin_cb, 55);
714	evio_set (&sin, 0, EV_READ);	1263	ev_io_init (&wio, sin_cb, 0, EV_READ);
715	evio_start (&sin);	1264	ev_io_start (&wio);
716		1265
717	struct ev_timer t[10000];	1266	struct ev_timer t[10000];
718		1267
719	#if 1	1268	#if 0
720	int i;	1269	int i;
721	for (i = 0; i < 10000; ++i)	1270	for (i = 0; i < 10000; ++i)
722	{	1271	{
723	struct ev_timer *w = t + i;	1272	struct ev_timer *w = t + i;
724	evw_init (w, ocb, i);	1273	ev_watcher_init (w, ocb, i);
725	evtimer_set_abs (w, drand48 (), 0.99775533);	1274	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
726	evtimer_start (w);	1275	ev_timer_start (w);
727	if (drand48 () < 0.5)	1276	if (drand48 () < 0.5)
728	evtimer_stop (w);	1277	ev_timer_stop (w);
729	}	1278	}
730	#endif	1279	#endif
731		1280
732	struct ev_timer t1;	1281	struct ev_timer t1;
733	evw_init (&t1, ocb, 0);	1282	ev_timer_init (&t1, ocb, 5, 10);
734	evtimer_set_abs (&t1, 5, 10);
735	evtimer_start (&t1);	1283	ev_timer_start (&t1);
736		1284
737	struct ev_signal sig;	1285	struct ev_signal sig;
738	evw_init (&sig, scb, 65535);
739	evsignal_set (&sig, SIGQUIT);	1286	ev_signal_init (&sig, scb, SIGQUIT);
740	evsignal_start (&sig);	1287	ev_signal_start (&sig);
		1288
		1289	struct ev_check cw;
		1290	ev_check_init (&cw, gcb);
		1291	ev_check_start (&cw);
		1292
		1293	struct ev_idle iw;
		1294	ev_idle_init (&iw, gcb);
		1295	ev_idle_start (&iw);
741		1296
742	ev_loop (0);	1297	ev_loop (0);
743		1298
744	return 0;	1299	return 0;
745	}	1300	}

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