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Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 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
		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
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
42	static void (*method_modify)(int fd, int oev, int nev);	125	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);	126	static void (*method_poll)(ev_tstamp timeout);
44		127
		128	/*****************************************************************************/
		129
45	ev_tstamp	130	ev_tstamp
46	ev_time (void)	131	ev_time (void)
47	{	132	{
48	#if HAVE_REALTIME	133	#if EV_USE_REALTIME
49	struct timespec ts;	134	struct timespec ts;
50	clock_gettime (CLOCK_REALTIME, &ts);	135	clock_gettime (CLOCK_REALTIME, &ts);
51	return ts.tv_sec + ts.tv_nsec * 1e-9;	136	return ts.tv_sec + ts.tv_nsec * 1e-9;
52	#else	137	#else
53	struct timeval tv;	138	struct timeval tv;
…		…
57	}	142	}
58		143
59	static ev_tstamp	144	static ev_tstamp
60	get_clock (void)	145	get_clock (void)
61	{	146	{
62	#if HAVE_MONOTONIC	147	#if EV_USE_MONOTONIC
63	if (have_monotonic)	148	if (expect_true (have_monotonic))
64	{	149	{
65	struct timespec ts;	150	struct timespec ts;
66	clock_gettime (CLOCK_MONOTONIC, &ts);	151	clock_gettime (CLOCK_MONOTONIC, &ts);
67	return ts.tv_sec + ts.tv_nsec * 1e-9;	152	return ts.tv_sec + ts.tv_nsec * 1e-9;
68	}	153	}
69	#endif	154	#endif
70		155
71	return ev_time ();	156	return ev_time ();
72	}	157	}
73		158
		159	#define array_roundsize(base,n) ((n) | 4 & ~3)
		160
74	#define array_needsize(base,cur,cnt,init) \	161	#define array_needsize(base,cur,cnt,init) \
75	if ((cnt) > cur) \	162	if (expect_false ((cnt) > cur)) \
76	{ \	163	{ \
77	int newcnt = cur ? cur << 1 : 16; \	164	int newcnt = cur; \
78	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	\
79	base = realloc (base, sizeof (*base) * (newcnt)); \	171	base = realloc (base, sizeof (*base) * (newcnt)); \
80	init (base + cur, newcnt - cur); \	172	init (base + cur, newcnt - cur); \
81	cur = newcnt; \	173	cur = newcnt; \
82	}	174	}
83		175
		176	/*****************************************************************************/
		177
84	typedef struct	178	typedef struct
85	{	179	{
86	struct ev_io *head;	180	struct ev_io *head;
87	unsigned char wev, rev; /* want, received event set */	181	unsigned char events;
		182	unsigned char reify;
88	} ANFD;	183	} ANFD;
89		184
90	static ANFD *anfds;	185	static ANFD *anfds;
91	static int anfdmax;	186	static int anfdmax;
92		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
93	static int *fdchanges;	251	static int *fdchanges;
94	static int fdchangemax, fdchangecnt;	252	static int fdchangemax, fdchangecnt;
95		253
96	static void	254	static void
97	anfds_init (ANFD *base, int count)	255	fd_reify (void)
98	{	256	{
99	while (count--)	257	int i;
100	{	258
101	base->head = 0;	259	for (i = 0; i < fdchangecnt; ++i)
102	base->wev = base->rev = EV_NONE;
103	++base;
104	}	260	{
105	}	261	int fd = fdchanges [i];
106
107	typedef struct
108	{
109	struct ev_watcher *w;
110	int events;
111	} ANPENDING;
112
113	static ANPENDING *pendings;
114	static int pendingmax, pendingcnt;
115
116	static void
117	event (struct ev_watcher *w, int events)
118	{
119	w->pending = ++pendingcnt;
120	array_needsize (pendings, pendingmax, pendingcnt, );
121	pendings [pendingcnt - 1].w = w;
122	pendings [pendingcnt - 1].events = events;
123	}
124
125	static void
126	fd_event (int fd, int events)
127	{
128	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	{
129	struct ev_io *w;	298	struct ev_io *w;
130		299
131	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)
132	{	328	{
133	int ev = w->events & events;	329	close (fd);
134		330	fd_kill (fd);
135	if (ev)	331	return;
136	event ((struct ev_watcher *)w, ev);
137	}	332	}
138	}	333	}
139		334
		335	/*****************************************************************************/
		336
140	static struct ev_timer **atimers;	337	static struct ev_timer **timers;
141	static int atimermax, atimercnt;	338	static int timermax, timercnt;
142		339
143	static struct ev_timer **rtimers;	340	static struct ev_periodic **periodics;
144	static int rtimermax, rtimercnt;	341	static int periodicmax, periodiccnt;
145		342
146	static void	343	static void
147	upheap (struct ev_timer **timers, int k)	344	upheap (WT *timers, int k)
148	{	345	{
149	struct ev_timer *w = timers [k];	346	WT w = timers [k];
150		347
151	while (k && timers [k >> 1]->at > w->at)	348	while (k && timers [k >> 1]->at > w->at)
152	{	349	{
153	timers [k] = timers [k >> 1];	350	timers [k] = timers [k >> 1];
154	timers [k]->active = k + 1;	351	timers [k]->active = k + 1;
…		…
159	timers [k]->active = k + 1;	356	timers [k]->active = k + 1;
160		357
161	}	358	}
162		359
163	static void	360	static void
164	downheap (struct ev_timer **timers, int N, int k)	361	downheap (WT *timers, int N, int k)
165	{	362	{
166	struct ev_timer *w = timers [k];	363	WT w = timers [k];
167		364
168	while (k < (N >> 1))	365	while (k < (N >> 1))
169	{	366	{
170	int j = k << 1;	367	int j = k << 1;
171		368
…		…
182		379
183	timers [k] = w;	380	timers [k] = w;
184	timers [k]->active = k + 1;	381	timers [k]->active = k + 1;
185	}	382	}
186		383
		384	/*****************************************************************************/
		385
187	typedef struct	386	typedef struct
188	{	387	{
189	struct ev_signal *head;	388	struct ev_signal *head;
190	sig_atomic_t gotsig;	389	sig_atomic_t volatile gotsig;
191	} ANSIG;	390	} ANSIG;
192		391
193	static ANSIG *signals;	392	static ANSIG *signals;
194	static int signalmax;	393	static int signalmax;
195		394
196	static int sigpipe [2];	395	static int sigpipe [2];
197	static sig_atomic_t gotsig;	396	static sig_atomic_t volatile gotsig;
198	static struct ev_io sigev;	397	static struct ev_io sigev;
199		398
200	static void	399	static void
201	signals_init (ANSIG *base, int count)	400	signals_init (ANSIG *base, int count)
202	{	401	{
203	while (count--)	402	while (count--)
204	{	403	{
205	base->head = 0;	404	base->head = 0;
206	base->gotsig = 0;	405	base->gotsig = 0;
		406
207	++base;	407	++base;
208	}	408	}
209	}	409	}
210		410
211	static void	411	static void
…		…
213	{	413	{
214	signals [signum - 1].gotsig = 1;	414	signals [signum - 1].gotsig = 1;
215		415
216	if (!gotsig)	416	if (!gotsig)
217	{	417	{
		418	int old_errno = errno;
218	gotsig = 1;	419	gotsig = 1;
219	write (sigpipe [1], &gotsig, 1);	420	write (sigpipe [1], &signum, 1);
		421	errno = old_errno;
220	}	422	}
221	}	423	}
222		424
223	static void	425	static void
224	sigcb (struct ev_io *iow, int revents)	426	sigcb (struct ev_io *iow, int revents)
225	{	427	{
226	struct ev_signal *w;	428	struct ev_signal *w;
227	int sig;	429	int signum;
228		430
		431	read (sigpipe [0], &revents, 1);
229	gotsig = 0;	432	gotsig = 0;
230	read (sigpipe [0], &revents, 1);
231		433
232	for (sig = signalmax; sig--; )	434	for (signum = signalmax; signum--; )
233	if (signals [sig].gotsig)	435	if (signals [signum].gotsig)
234	{	436	{
235	signals [sig].gotsig = 0;	437	signals [signum].gotsig = 0;
236		438
237	for (w = signals [sig].head; w; w = w->next)	439	for (w = signals [signum].head; w; w = w->next)
238	event ((struct ev_watcher *)w, EV_SIGNAL);	440	event ((W)w, EV_SIGNAL);
239	}	441	}
240	}	442	}
241		443
242	static void	444	static void
243	siginit (void)	445	siginit (void)
244	{	446	{
		447	#ifndef WIN32
245	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	448	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
246	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
247		450
248	/* rather than sort out wether we really need nb, set it */	451	/* rather than sort out wether we really need nb, set it */
249	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	452	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
250	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		454	#endif
251		455
252	evio_set (&sigev, sigpipe [0], EV_READ);	456	ev_io_set (&sigev, sigpipe [0], EV_READ);
253	evio_start (&sigev);	457	ev_io_start (&sigev);
254	}	458	}
255		459
		460	/*****************************************************************************/
		461
		462	static struct ev_idle **idles;
		463	static int idlemax, idlecnt;
		464
		465	static struct ev_prepare **prepares;
		466	static int preparemax, preparecnt;
		467
		468	static struct ev_check **checks;
		469	static int checkmax, checkcnt;
		470
		471	/*****************************************************************************/
		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
256	#if HAVE_EPOLL	521	#if EV_USE_EPOLL
257	# include "ev_epoll.c"	522	# include "ev_epoll.c"
258	#endif	523	#endif
		524	#if EV_USE_POLL
		525	# include "ev_poll.c"
		526	#endif
259	#if HAVE_SELECT	527	#if EV_USE_SELECT
260	# include "ev_select.c"	528	# include "ev_select.c"
261	#endif	529	#endif
262		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
263	int ev_init (int flags)	551	int ev_init (int methods)
264	{	552	{
265	#if HAVE_MONOTONIC
266	{
267	struct timespec ts;
268	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
269	have_monotonic = 1;
270	}
271	#endif
272
273	ev_now = ev_time ();
274	now = get_clock ();
275	diff = ev_now - now;
276
277	if (pipe (sigpipe))
278	return 0;
279
280	ev_method = EVMETHOD_NONE;
281	#if HAVE_EPOLL
282	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
283	#endif
284	#if HAVE_SELECT
285	if (ev_method == EVMETHOD_NONE) select_init (flags);
286	#endif
287
288	if (ev_method)	553	if (!ev_method)
		554	{
		555	#if EV_USE_MONOTONIC
289	{	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	{
290	evw_init (&sigev, sigcb, 0);	593	ev_watcher_init (&sigev, sigcb);
		594	ev_set_priority (&sigev, EV_MAXPRI);
291	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	}
292	}	603	}
293		604
294	return ev_method;	605	return ev_method;
295	}	606	}
296		607
297	void ev_prefork (void)	608	/*****************************************************************************/
298	{
299	}
300		609
		610	void
		611	ev_fork_prepare (void)
		612	{
		613	/* nop */
		614	}
		615
		616	void
301	void ev_postfork_parent (void)	617	ev_fork_parent (void)
302	{	618	{
		619	/* nop */
303	}	620	}
304		621
		622	void
305	void ev_postfork_child (void)	623	ev_fork_child (void)
306	{	624	{
307	#if HAVE_EPOLL	625	#if EV_USE_EPOLL
308	if (ev_method == EVMETHOD_EPOLL)	626	if (ev_method == EVMETHOD_EPOLL)
309	epoll_postfork_child ();	627	epoll_postfork_child ();
310	#endif	628	#endif
311		629
312	evio_stop (&sigev);	630	ev_io_stop (&sigev);
313	close (sigpipe [0]);	631	close (sigpipe [0]);
314	close (sigpipe [1]);	632	close (sigpipe [1]);
315	pipe (sigpipe);	633	pipe (sigpipe);
316	siginit ();	634	siginit ();
317	}	635	}
318		636
		637	/*****************************************************************************/
		638
319	static void	639	static void
320	fd_reify (void)	640	call_pending (void)
321	{	641	{
322	int i;	642	int pri;
323		643
324	for (i = 0; i < fdchangecnt; ++i)	644	for (pri = NUMPRI; pri--; )
325	{	645	while (pendingcnt [pri])
326	int fd = fdchanges [i];
327	ANFD *anfd = anfds + fd;
328	struct ev_io *w;
329
330	int wev = 0;
331
332	for (w = anfd->head; w; w = w->next)
333	wev |= w->events;
334
335	if (anfd->wev != wev)
336	{	646	{
337	method_modify (fd, anfd->wev, wev);	647	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
338	anfd->wev = wev;
339	}
340	}
341		648
342	fdchangecnt = 0;
343	}
344
345	static void
346	call_pending ()
347	{
348	int i;
349
350	for (i = 0; i < pendingcnt; ++i)
351	{
352	ANPENDING *p = pendings + i;
353
354	if (p->w)	649	if (p->w)
355	{	650	{
356	p->w->pending = 0;	651	p->w->pending = 0;
357	p->w->cb (p->w, p->events);	652	p->w->cb (p->w, p->events);
358	}	653	}
359	}	654	}
360
361	pendingcnt = 0;
362	}	655	}
363		656
364	static void	657	static void
365	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	658	timers_reify (void)
366	{	659	{
367	while (timercnt && timers [0]->at <= now)	660	while (timercnt && timers [0]->at <= now)
368	{	661	{
369	struct ev_timer *w = timers [0];	662	struct ev_timer *w = timers [0];
370		663
371	/* first reschedule or stop timer */	664	/* first reschedule or stop timer */
372	if (w->repeat)	665	if (w->repeat)
373	{	666	{
374	if (w->is_abs)	667	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
375	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
376	else
377	w->at = now + w->repeat;	668	w->at = now + w->repeat;
378
379	assert (w->at > now);
380
381	downheap (timers, timercnt, 0);	669	downheap ((WT *)timers, timercnt, 0);
382	}	670	}
383	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)
384	{	687	{
385	evtimer_stop (w); /* nonrepeating: stop timer */	688	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
386	--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);
387	}	691	}
		692	else
		693	ev_periodic_stop (w); /* nonrepeating: stop timer */
388		694
389	event ((struct ev_watcher *)w, EV_TIMEOUT);	695	event ((W)w, EV_PERIODIC);
390	}	696	}
391	}	697	}
392		698
393	static void	699	static void
394	time_update ()	700	periodics_reschedule (ev_tstamp diff)
395	{	701	{
396	int i;	702	int i;
397	ev_now = ev_time ();
398		703
399	if (have_monotonic)	704	/* adjust periodics after time jump */
		705	for (i = 0; i < periodiccnt; ++i)
400	{	706	{
401	ev_tstamp odiff = diff;	707	struct ev_periodic *w = periodics [i];
402		708
403	/* detecting time jumps is much more difficult */	709	if (w->interval)
404	for (i = 2; --i; ) /* loop a few times, before making important decisions */
405	{	710	{
406	now = get_clock ();	711	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
407	diff = ev_now - now;
408		712
409	if (fabs (odiff - diff) < MIN_TIMEJUMP)	713	if (fabs (diff) >= 1e-4)
410	return; /* all is well */	714	{
		715	ev_periodic_stop (w);
		716	ev_periodic_start (w);
411		717
412	ev_now = ev_time ();	718	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		719	}
413	}	720	}
		721	}
		722	}
414		723
415	/* time jump detected, reschedule atimers */	724	static int
416	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 ())
417	{	751	{
418	struct ev_timer *w = atimers [i];	752	ev_tstamp odiff = diff;
419	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 */
420	}	768	}
421	}	769	}
422	else	770	else
		771	#endif
423	{	772	{
		773	ev_now = ev_time ();
		774
424	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))
425	/* 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 */
426	for (i = 0; i < rtimercnt; ++i)	780	for (i = 0; i < timercnt; ++i)
427	rtimers [i]->at += ev_now - now;	781	timers [i]->at += diff;
		782	}
428		783
429	now = ev_now;	784	now = ev_now;
430	}	785	}
431	}	786	}
432		787
433	int ev_loop_done;	788	int ev_loop_done;
434		789
435	void ev_loop (int flags)	790	void ev_loop (int flags)
436	{	791	{
437	double block;	792	double block;
438	ev_loop_done = flags & EVLOOP_ONESHOT;	793	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
439		794
440	do	795	do
441	{	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
442	/* update fd-related kernel structures */	804	/* update fd-related kernel structures */
443	fd_reify ();	805	fd_reify ();
444		806
445	/* 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
446	if (flags & EVLOOP_NONBLOCK)	821	if (flags & EVLOOP_NONBLOCK || idlecnt)
447	block = 0.;	822	block = 0.;
448	else	823	else
449	{	824	{
450	block = MAX_BLOCKTIME;	825	block = MAX_BLOCKTIME;
451		826
452	if (rtimercnt)	827	if (timercnt)
453	{	828	{
454	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	829	ev_tstamp to = timers [0]->at - now + method_fudge;
455	if (block > to) block = to;	830	if (block > to) block = to;
456	}	831	}
457		832
458	if (atimercnt)	833	if (periodiccnt)
459	{	834	{
460	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	835	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
461	if (block > to) block = to;	836	if (block > to) block = to;
462	}	837	}
463		838
464	if (block < 0.) block = 0.;	839	if (block < 0.) block = 0.;
465	}	840	}
…		…
467	method_poll (block);	842	method_poll (block);
468		843
469	/* update ev_now, do magic */	844	/* update ev_now, do magic */
470	time_update ();	845	time_update ();
471		846
472	/* put pending timers into pendign queue and reschedule them */	847	/* queue pending timers and reschedule them */
473	/* absolute timers first */	848	timers_reify (); /* relative timers called last */
474	timers_reify (atimers, atimercnt, ev_now);	849	periodics_reify (); /* absolute timers called first */
475	/* relative timers second */	850
476	timers_reify (rtimers, rtimercnt, now);	851	/* queue idle watchers unless io or timers are pending */
		852	if (!pendingcnt)
		853	queue_events ((W *)idles, idlecnt, EV_IDLE);
		854
		855	/* queue check watchers, to be executed first */
		856	if (checkcnt)
		857	queue_events ((W *)checks, checkcnt, EV_CHECK);
477		858
478	call_pending ();	859	call_pending ();
479	}	860	}
480	while (!ev_loop_done);	861	while (!ev_loop_done);
481	}
482		862
		863	if (ev_loop_done != 2)
		864	ev_loop_done = 0;
		865	}
		866
		867	/*****************************************************************************/
		868
483	static void	869	static void
484	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	870	wlist_add (WL *head, WL elem)
485	{	871	{
486	elem->next = *head;	872	elem->next = *head;
487	*head = elem;	873	*head = elem;
488	}	874	}
489		875
490	static void	876	static void
491	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	877	wlist_del (WL *head, WL elem)
492	{	878	{
493	while (*head)	879	while (*head)
494	{	880	{
495	if (*head == elem)	881	if (*head == elem)
496	{	882	{
…		…
501	head = &(*head)->next;	887	head = &(*head)->next;
502	}	888	}
503	}	889	}
504		890
505	static void	891	static void
506	ev_start (struct ev_watcher *w, int active)	892	ev_clear_pending (W w)
507	{	893	{
		894	if (w->pending)
		895	{
		896	pendings [ABSPRI (w)][w->pending - 1].w = 0;
508	w->pending = 0;	897	w->pending = 0;
		898	}
		899	}
		900
		901	static void
		902	ev_start (W w, int active)
		903	{
		904	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		905	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		906
509	w->active = active;	907	w->active = active;
510	}	908	}
511		909
512	static void	910	static void
513	ev_stop (struct ev_watcher *w)	911	ev_stop (W w)
514	{	912	{
515	if (w->pending)
516	pendings [w->pending - 1].w = 0;
517
518	w->active = 0;	913	w->active = 0;
519	/* nop */
520	}	914	}
521		915
		916	/*****************************************************************************/
		917
522	void	918	void
523	evio_start (struct ev_io *w)	919	ev_io_start (struct ev_io *w)
524	{	920	{
		921	int fd = w->fd;
		922
525	if (ev_is_active (w))	923	if (ev_is_active (w))
526	return;	924	return;
527		925
528	int fd = w->fd;	926	assert (("ev_io_start called with negative fd", fd >= 0));
529		927
530	ev_start ((struct ev_watcher *)w, 1);	928	ev_start ((W)w, 1);
531	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	929	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
532	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	930	wlist_add ((WL *)&anfds[fd].head, (WL)w);
533		931
534	++fdchangecnt;	932	fd_change (fd);
535	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536	fdchanges [fdchangecnt - 1] = fd;
537	}	933	}
538		934
539	void	935	void
540	evio_stop (struct ev_io *w)	936	ev_io_stop (struct ev_io *w)
541	{	937	{
		938	ev_clear_pending ((W)w);
542	if (!ev_is_active (w))	939	if (!ev_is_active (w))
543	return;	940	return;
544		941
545	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	942	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
546	ev_stop ((struct ev_watcher *)w);	943	ev_stop ((W)w);
547		944
548	++fdchangecnt;	945	fd_change (w->fd);
549	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550	fdchanges [fdchangecnt - 1] = w->fd;
551	}	946	}
552		947
553	void	948	void
554	evtimer_start (struct ev_timer *w)	949	ev_timer_start (struct ev_timer *w)
555	{	950	{
556	if (ev_is_active (w))	951	if (ev_is_active (w))
557	return;	952	return;
558		953
559	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);
560	{	975	}
561	/* 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	{
562	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)
563	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1009	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
564		1010
565	ev_start ((struct ev_watcher *)w, ++atimercnt);	1011	ev_start ((W)w, ++periodiccnt);
566	array_needsize (atimers, atimermax, atimercnt, );	1012	array_needsize (periodics, periodicmax, periodiccnt, );
567	atimers [atimercnt - 1] = w;	1013	periodics [periodiccnt - 1] = w;
568	upheap (atimers, atimercnt - 1);	1014	upheap ((WT *)periodics, periodiccnt - 1);
569	}
570	else
571	{
572	w->at += now;
573
574	ev_start ((struct ev_watcher *)w, ++rtimercnt);
575	array_needsize (rtimers, rtimermax, rtimercnt, );
576	rtimers [rtimercnt - 1] = w;
577	upheap (rtimers, rtimercnt - 1);
578	}
579
580	}	1015	}
581		1016
582	void	1017	void
583	evtimer_stop (struct ev_timer *w)	1018	ev_periodic_stop (struct ev_periodic *w)
584	{	1019	{
		1020	ev_clear_pending ((W)w);
585	if (!ev_is_active (w))	1021	if (!ev_is_active (w))
586	return;	1022	return;
587		1023
588	if (w->is_abs)
589	{
590	if (w->active < atimercnt--)	1024	if (w->active < periodiccnt--)
591	{
592	atimers [w->active - 1] = atimers [atimercnt];
593	downheap (atimers, atimercnt, w->active - 1);
594	}
595	}	1025	{
596	else	1026	periodics [w->active - 1] = periodics [periodiccnt];
		1027	downheap ((WT *)periodics, periodiccnt, w->active - 1);
597	{	1028	}
598	if (w->active < rtimercnt--)
599	{
600	rtimers [w->active - 1] = rtimers [rtimercnt];
601	downheap (rtimers, rtimercnt, w->active - 1);
602	}
603	}
604		1029
605	ev_stop ((struct ev_watcher *)w);	1030	ev_stop ((W)w);
606	}	1031	}
607		1032
		1033	#ifndef SA_RESTART
		1034	# define SA_RESTART 0
		1035	#endif
		1036
608	void	1037	void
609	evsignal_start (struct ev_signal *w)	1038	ev_signal_start (struct ev_signal *w)
610	{	1039	{
611	if (ev_is_active (w))	1040	if (ev_is_active (w))
612	return;	1041	return;
613		1042
614	ev_start ((struct ev_watcher *)w, 1);	1043	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1044
		1045	ev_start ((W)w, 1);
615	array_needsize (signals, signalmax, w->signum, signals_init);	1046	array_needsize (signals, signalmax, w->signum, signals_init);
616	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1047	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
617		1048
618	if (!w->next)	1049	if (!w->next)
619	{	1050	{
620	struct sigaction sa;	1051	struct sigaction sa;
621	sa.sa_handler = sighandler;	1052	sa.sa_handler = sighandler;
622	sigfillset (&sa.sa_mask);	1053	sigfillset (&sa.sa_mask);
623	sa.sa_flags = 0;	1054	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
624	sigaction (w->signum, &sa, 0);	1055	sigaction (w->signum, &sa, 0);
625	}	1056	}
626	}	1057	}
627		1058
628	void	1059	void
629	evsignal_stop (struct ev_signal *w)	1060	ev_signal_stop (struct ev_signal *w)
630	{	1061	{
		1062	ev_clear_pending ((W)w);
631	if (!ev_is_active (w))	1063	if (!ev_is_active (w))
632	return;	1064	return;
633		1065
634	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1066	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
635	ev_stop ((struct ev_watcher *)w);	1067	ev_stop ((W)w);
636		1068
637	if (!signals [w->signum - 1].head)	1069	if (!signals [w->signum - 1].head)
638	signal (w->signum, SIG_DFL);	1070	signal (w->signum, SIG_DFL);
639	}	1071	}
640		1072
		1073	void
		1074	ev_idle_start (struct ev_idle *w)
		1075	{
		1076	if (ev_is_active (w))
		1077	return;
		1078
		1079	ev_start ((W)w, ++idlecnt);
		1080	array_needsize (idles, idlemax, idlecnt, );
		1081	idles [idlecnt - 1] = w;
		1082	}
		1083
		1084	void
		1085	ev_idle_stop (struct ev_idle *w)
		1086	{
		1087	ev_clear_pending ((W)w);
		1088	if (ev_is_active (w))
		1089	return;
		1090
		1091	idles [w->active - 1] = idles [--idlecnt];
		1092	ev_stop ((W)w);
		1093	}
		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
		1118	ev_check_start (struct ev_check *w)
		1119	{
		1120	if (ev_is_active (w))
		1121	return;
		1122
		1123	ev_start ((W)w, ++checkcnt);
		1124	array_needsize (checks, checkmax, checkcnt, );
		1125	checks [checkcnt - 1] = w;
		1126	}
		1127
		1128	void
		1129	ev_check_stop (struct ev_check *w)
		1130	{
		1131	ev_clear_pending ((W)w);
		1132	if (ev_is_active (w))
		1133	return;
		1134
		1135	checks [w->active - 1] = checks [--checkcnt];
		1136	ev_stop ((W)w);
		1137	}
		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
641	/*****************************************************************************/	1160	/*****************************************************************************/
		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
642	#if 1	1225	#if 0
		1226
		1227	struct ev_io wio;
643		1228
644	static void	1229	static void
645	sin_cb (struct ev_io *w, int revents)	1230	sin_cb (struct ev_io *w, int revents)
646	{	1231	{
647	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1232	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
649		1234
650	static void	1235	static void
651	ocb (struct ev_timer *w, int revents)	1236	ocb (struct ev_timer *w, int revents)
652	{	1237	{
653	//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);
654	evtimer_stop (w);	1239	ev_timer_stop (w);
655	evtimer_start (w);	1240	ev_timer_start (w);
656	}	1241	}
657		1242
658	static void	1243	static void
659	scb (struct ev_signal *w, int revents)	1244	scb (struct ev_signal *w, int revents)
660	{	1245	{
661	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);
		1249	}
		1250
		1251	static void
		1252	gcb (struct ev_signal *w, int revents)
		1253	{
		1254	fprintf (stderr, "generic %x\n", revents);
		1255
662	}	1256	}
663		1257
664	int main (void)	1258	int main (void)
665	{	1259	{
666	struct ev_io sin;
667
668	ev_init (0);	1260	ev_init (0);
669		1261
670	evw_init (&sin, sin_cb, 55);
671	evio_set (&sin, 0, EV_READ);	1262	ev_io_init (&wio, sin_cb, 0, EV_READ);
672	evio_start (&sin);	1263	ev_io_start (&wio);
673		1264
674	struct ev_timer t[10000];	1265	struct ev_timer t[10000];
675		1266
676	#if 0	1267	#if 0
677	int i;	1268	int i;
678	for (i = 0; i < 10000; ++i)	1269	for (i = 0; i < 10000; ++i)
679	{	1270	{
680	struct ev_timer *w = t + i;	1271	struct ev_timer *w = t + i;
681	evw_init (w, ocb, i);	1272	ev_watcher_init (w, ocb, i);
682	evtimer_set_abs (w, drand48 (), 0.99775533);	1273	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
683	evtimer_start (w);	1274	ev_timer_start (w);
684	if (drand48 () < 0.5)	1275	if (drand48 () < 0.5)
685	evtimer_stop (w);	1276	ev_timer_stop (w);
686	}	1277	}
687	#endif	1278	#endif
688		1279
689	struct ev_timer t1;	1280	struct ev_timer t1;
690	evw_init (&t1, ocb, 0);	1281	ev_timer_init (&t1, ocb, 5, 10);
691	evtimer_set_abs (&t1, 5, 10);
692	evtimer_start (&t1);	1282	ev_timer_start (&t1);
693		1283
694	struct ev_signal sig;	1284	struct ev_signal sig;
695	evw_init (&sig, scb, 65535);
696	evsignal_set (&sig, SIGQUIT);	1285	ev_signal_init (&sig, scb, SIGQUIT);
697	evsignal_start (&sig);	1286	ev_signal_start (&sig);
		1287
		1288	struct ev_check cw;
		1289	ev_check_init (&cw, gcb);
		1290	ev_check_start (&cw);
		1291
		1292	struct ev_idle iw;
		1293	ev_idle_init (&iw, gcb);
		1294	ev_idle_start (&iw);
698		1295
699	ev_loop (0);	1296	ev_loop (0);
700		1297
701	return 0;	1298	return 0;
702	}	1299	}

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