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Comparing libev/ev.c (file contents):
Revision 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs.
Revision 1.46 by root, Sat Nov 3 09:20:12 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	static void
145	queue_events (struct ev_watcher **events, int eventcnt, int type)
146	{
147	int i;
148
149	for (i = 0; i < eventcnt; ++i)
150	event (events [i], type);
151	}
152
153	/*****************************************************************************/	335	/*****************************************************************************/
154		336
155	static struct ev_timer **atimers;	337	static struct ev_timer **timers;
156	static int atimermax, atimercnt;	338	static int timermax, timercnt;
157		339
158	static struct ev_timer **rtimers;	340	static struct ev_periodic **periodics;
159	static int rtimermax, rtimercnt;	341	static int periodicmax, periodiccnt;
160		342
161	static void	343	static void
162	upheap (struct ev_timer **timers, int k)	344	upheap (WT *timers, int k)
163	{	345	{
164	struct ev_timer *w = timers [k];	346	WT w = timers [k];
165		347
166	while (k && timers [k >> 1]->at > w->at)	348	while (k && timers [k >> 1]->at > w->at)
167	{	349	{
168	timers [k] = timers [k >> 1];	350	timers [k] = timers [k >> 1];
169	timers [k]->active = k + 1;	351	timers [k]->active = k + 1;
…		…
174	timers [k]->active = k + 1;	356	timers [k]->active = k + 1;
175		357
176	}	358	}
177		359
178	static void	360	static void
179	downheap (struct ev_timer **timers, int N, int k)	361	downheap (WT *timers, int N, int k)
180	{	362	{
181	struct ev_timer *w = timers [k];	363	WT w = timers [k];
182		364
183	while (k < (N >> 1))	365	while (k < (N >> 1))
184	{	366	{
185	int j = k << 1;	367	int j = k << 1;
186		368
…		…
202	/*****************************************************************************/	384	/*****************************************************************************/
203		385
204	typedef struct	386	typedef struct
205	{	387	{
206	struct ev_signal *head;	388	struct ev_signal *head;
207	sig_atomic_t gotsig;	389	sig_atomic_t volatile gotsig;
208	} ANSIG;	390	} ANSIG;
209		391
210	static ANSIG *signals;	392	static ANSIG *signals;
211	static int signalmax;	393	static int signalmax;
212		394
213	static int sigpipe [2];	395	static int sigpipe [2];
214	static sig_atomic_t gotsig;	396	static sig_atomic_t volatile gotsig;
215	static struct ev_io sigev;	397	static struct ev_io sigev;
216		398
217	static void	399	static void
218	signals_init (ANSIG *base, int count)	400	signals_init (ANSIG *base, int count)
219	{	401	{
220	while (count--)	402	while (count--)
221	{	403	{
222	base->head = 0;	404	base->head = 0;
223	base->gotsig = 0;	405	base->gotsig = 0;
		406
224	++base;	407	++base;
225	}	408	}
226	}	409	}
227		410
228	static void	411	static void
…		…
231	signals [signum - 1].gotsig = 1;	414	signals [signum - 1].gotsig = 1;
232		415
233	if (!gotsig)	416	if (!gotsig)
234	{	417	{
235	gotsig = 1;	418	gotsig = 1;
236	write (sigpipe [1], &gotsig, 1);	419	write (sigpipe [1], &signum, 1);
237	}	420	}
238	}	421	}
239		422
240	static void	423	static void
241	sigcb (struct ev_io *iow, int revents)	424	sigcb (struct ev_io *iow, int revents)
242	{	425	{
243	struct ev_signal *w;	426	struct ev_signal *w;
244	int sig;	427	int signum;
245		428
		429	read (sigpipe [0], &revents, 1);
246	gotsig = 0;	430	gotsig = 0;
247	read (sigpipe [0], &revents, 1);
248		431
249	for (sig = signalmax; sig--; )	432	for (signum = signalmax; signum--; )
250	if (signals [sig].gotsig)	433	if (signals [signum].gotsig)
251	{	434	{
252	signals [sig].gotsig = 0;	435	signals [signum].gotsig = 0;
253		436
254	for (w = signals [sig].head; w; w = w->next)	437	for (w = signals [signum].head; w; w = w->next)
255	event ((struct ev_watcher *)w, EV_SIGNAL);	438	event ((W)w, EV_SIGNAL);
256	}	439	}
257	}	440	}
258		441
259	static void	442	static void
260	siginit (void)	443	siginit (void)
261	{	444	{
		445	#ifndef WIN32
262	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	446	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
263	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	447	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
264		448
265	/* rather than sort out wether we really need nb, set it */	449	/* rather than sort out wether we really need nb, set it */
266	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	450	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
267	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	451	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		452	#endif
268		453
269	evio_set (&sigev, sigpipe [0], EV_READ);	454	ev_io_set (&sigev, sigpipe [0], EV_READ);
270	evio_start (&sigev);	455	ev_io_start (&sigev);
271	}	456	}
272		457
273	/*****************************************************************************/	458	/*****************************************************************************/
274		459
275	static struct ev_idle **idles;	460	static struct ev_idle **idles;
276	static int idlemax, idlecnt;	461	static int idlemax, idlecnt;
277		462
		463	static struct ev_prepare **prepares;
		464	static int preparemax, preparecnt;
		465
278	static struct ev_check **checks;	466	static struct ev_check **checks;
279	static int checkmax, checkcnt;	467	static int checkmax, checkcnt;
280		468
281	/*****************************************************************************/	469	/*****************************************************************************/
282		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	childcb (struct ev_signal *sw, int revents)
		482	{
		483	struct ev_child *w;
		484	int pid, status;
		485
		486	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)
		487	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
		488	if (w->pid == pid || !w->pid)
		489	{
		490	w->rpid = pid;
		491	w->rstatus = status;
		492	event ((W)w, EV_CHILD);
		493	}
		494	}
		495
		496	#endif
		497
		498	/*****************************************************************************/
		499
		500	#if EV_USE_KQUEUE
		501	# include "ev_kqueue.c"
		502	#endif
283	#if HAVE_EPOLL	503	#if EV_USE_EPOLL
284	# include "ev_epoll.c"	504	# include "ev_epoll.c"
285	#endif	505	#endif
		506	#if EV_USE_POLL
		507	# include "ev_poll.c"
		508	#endif
286	#if HAVE_SELECT	509	#if EV_USE_SELECT
287	# include "ev_select.c"	510	# include "ev_select.c"
288	#endif	511	#endif
289		512
		513	int
		514	ev_version_major (void)
		515	{
		516	return EV_VERSION_MAJOR;
		517	}
		518
		519	int
		520	ev_version_minor (void)
		521	{
		522	return EV_VERSION_MINOR;
		523	}
		524
		525	/* return true if we are running with elevated privileges and ignore env variables */
		526	static int
		527	enable_secure ()
		528	{
		529	return getuid () != geteuid ()
		530	|| getgid () != getegid ();
		531	}
		532
290	int ev_init (int flags)	533	int ev_init (int methods)
291	{	534	{
292	#if HAVE_MONOTONIC
293	{
294	struct timespec ts;
295	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
296	have_monotonic = 1;
297	}
298	#endif
299
300	ev_now = ev_time ();
301	now = get_clock ();
302	diff = ev_now - now;
303
304	if (pipe (sigpipe))
305	return 0;
306
307	ev_method = EVMETHOD_NONE;
308	#if HAVE_EPOLL
309	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
310	#endif
311	#if HAVE_SELECT
312	if (ev_method == EVMETHOD_NONE) select_init (flags);
313	#endif
314
315	if (ev_method)	535	if (!ev_method)
		536	{
		537	#if EV_USE_MONOTONIC
316	{	538	{
		539	struct timespec ts;
		540	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		541	have_monotonic = 1;
		542	}
		543	#endif
		544
		545	ev_now = ev_time ();
		546	now = get_clock ();
		547	now_floor = now;
		548	diff = ev_now - now;
		549
		550	if (pipe (sigpipe))
		551	return 0;
		552
		553	if (methods == EVMETHOD_AUTO)
		554	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		555	methods = atoi (getenv ("LIBEV_METHODS"));
		556	else
		557	methods = EVMETHOD_ANY;
		558
		559	ev_method = 0;
		560	#if EV_USE_KQUEUE
		561	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
		562	#endif
		563	#if EV_USE_EPOLL
		564	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
		565	#endif
		566	#if EV_USE_POLL
		567	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
		568	#endif
		569	#if EV_USE_SELECT
		570	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
		571	#endif
		572
		573	if (ev_method)
		574	{
317	evw_init (&sigev, sigcb, 0);	575	ev_watcher_init (&sigev, sigcb);
318	siginit ();	576	siginit ();
		577
		578	#ifndef WIN32
		579	ev_signal_init (&childev, childcb, SIGCHLD);
		580	ev_signal_start (&childev);
		581	#endif
		582	}
319	}	583	}
320		584
321	return ev_method;	585	return ev_method;
322	}	586	}
323		587
324	/*****************************************************************************/	588	/*****************************************************************************/
325		589
326	void ev_prefork (void)	590	void
		591	ev_fork_prepare (void)
327	{	592	{
		593	/* nop */
328	}	594	}
329		595
		596	void
330	void ev_postfork_parent (void)	597	ev_fork_parent (void)
331	{	598	{
		599	/* nop */
332	}	600	}
333		601
		602	void
334	void ev_postfork_child (void)	603	ev_fork_child (void)
335	{	604	{
336	#if HAVE_EPOLL	605	#if EV_USE_EPOLL
337	if (ev_method == EVMETHOD_EPOLL)	606	if (ev_method == EVMETHOD_EPOLL)
338	epoll_postfork_child ();	607	epoll_postfork_child ();
339	#endif	608	#endif
340		609
341	evio_stop (&sigev);	610	ev_io_stop (&sigev);
342	close (sigpipe [0]);	611	close (sigpipe [0]);
343	close (sigpipe [1]);	612	close (sigpipe [1]);
344	pipe (sigpipe);	613	pipe (sigpipe);
345	siginit ();	614	siginit ();
346	}	615	}
347		616
348	/*****************************************************************************/	617	/*****************************************************************************/
349		618
350	static void	619	static void
351	fd_reify (void)	620	call_pending (void)
352	{	621	{
353	int i;	622	int pri;
354		623
355	for (i = 0; i < fdchangecnt; ++i)	624	for (pri = NUMPRI; pri--; )
356	{	625	while (pendingcnt [pri])
357	int fd = fdchanges [i];
358	ANFD *anfd = anfds + fd;
359	struct ev_io *w;
360
361	int wev = 0;
362
363	for (w = anfd->head; w; w = w->next)
364	wev |= w->events;
365
366	if (anfd->wev != wev)
367	{	626	{
368	method_modify (fd, anfd->wev, wev);	627	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
369	anfd->wev = wev;
370	}
371	}
372		628
373	fdchangecnt = 0;
374	}
375
376	static void
377	call_pending ()
378	{
379	int i;
380
381	for (i = 0; i < pendingcnt; ++i)
382	{
383	ANPENDING *p = pendings + i;
384
385	if (p->w)	629	if (p->w)
386	{	630	{
387	p->w->pending = 0;	631	p->w->pending = 0;
388	p->w->cb (p->w, p->events);	632	p->w->cb (p->w, p->events);
389	}	633	}
390	}	634	}
391
392	pendingcnt = 0;
393	}	635	}
394		636
395	static void	637	static void
396	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	638	timers_reify (void)
397	{	639	{
398	while (timercnt && timers [0]->at <= now)	640	while (timercnt && timers [0]->at <= now)
399	{	641	{
400	struct ev_timer *w = timers [0];	642	struct ev_timer *w = timers [0];
401		643
402	/* first reschedule or stop timer */	644	/* first reschedule or stop timer */
403	if (w->repeat)	645	if (w->repeat)
404	{	646	{
405	if (w->is_abs)	647	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
406	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
407	else
408	w->at = now + w->repeat;	648	w->at = now + w->repeat;
409
410	assert (w->at > now);
411
412	downheap (timers, timercnt, 0);	649	downheap ((WT *)timers, timercnt, 0);
413	}	650	}
414	else	651	else
415	{
416	evtimer_stop (w); /* nonrepeating: stop timer */	652	ev_timer_stop (w); /* nonrepeating: stop timer */
417	--timercnt; /* maybe pass by reference instead? */	653
		654	event ((W)w, EV_TIMEOUT);
		655	}
		656	}
		657
		658	static void
		659	periodics_reify (void)
		660	{
		661	while (periodiccnt && periodics [0]->at <= ev_now)
		662	{
		663	struct ev_periodic *w = periodics [0];
		664
		665	/* first reschedule or stop timer */
		666	if (w->interval)
418	}	667	{
		668	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		669	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));
		670	downheap ((WT *)periodics, periodiccnt, 0);
		671	}
		672	else
		673	ev_periodic_stop (w); /* nonrepeating: stop timer */
419		674
420	event ((struct ev_watcher *)w, EV_TIMEOUT);	675	event ((W)w, EV_PERIODIC);
421	}	676	}
422	}	677	}
423		678
424	static void	679	static void
425	time_update ()	680	periodics_reschedule (ev_tstamp diff)
426	{	681	{
427	int i;	682	int i;
428	ev_now = ev_time ();
429		683
430	if (have_monotonic)	684	/* adjust periodics after time jump */
		685	for (i = 0; i < periodiccnt; ++i)
431	{	686	{
432	ev_tstamp odiff = diff;	687	struct ev_periodic *w = periodics [i];
433		688
434	/* detecting time jumps is much more difficult */	689	if (w->interval)
435	for (i = 2; --i; ) /* loop a few times, before making important decisions */
436	{
437	now = get_clock ();
438	diff = ev_now - now;
439
440	if (fabs (odiff - diff) < MIN_TIMEJUMP)
441	return; /* all is well */
442
443	ev_now = ev_time ();
444	}	690	{
		691	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
445		692
446	/* time jump detected, reschedule atimers */	693	if (fabs (diff) >= 1e-4)
447	for (i = 0; i < atimercnt; ++i)	694	{
		695	ev_periodic_stop (w);
		696	ev_periodic_start (w);
		697
		698	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		699	}
448	{	700	}
449	struct ev_timer *w = atimers [i];	701	}
450	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	702	}
451	}	703
		704	static int
		705	time_update_monotonic (void)
		706	{
		707	now = get_clock ();
		708
		709	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
		710	{
		711	ev_now = now + diff;
		712	return 0;
452	}	713	}
453	else	714	else
454	{	715	{
		716	now_floor = now;
		717	ev_now = ev_time ();
		718	return 1;
		719	}
		720	}
		721
		722	static void
		723	time_update (void)
		724	{
		725	int i;
		726
		727	#if EV_USE_MONOTONIC
		728	if (expect_true (have_monotonic))
		729	{
		730	if (time_update_monotonic ())
		731	{
		732	ev_tstamp odiff = diff;
		733
		734	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		735	{
		736	diff = ev_now - now;
		737
		738	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		739	return; /* all is well */
		740
		741	ev_now = ev_time ();
		742	now = get_clock ();
		743	now_floor = now;
		744	}
		745
		746	periodics_reschedule (diff - odiff);
		747	/* no timer adjustment, as the monotonic clock doesn't jump */
		748	}
		749	}
		750	else
		751	#endif
		752	{
		753	ev_now = ev_time ();
		754
455	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	755	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
456	/* time jump detected, adjust rtimers */	756	{
		757	periodics_reschedule (ev_now - now);
		758
		759	/* adjust timers. this is easy, as the offset is the same for all */
457	for (i = 0; i < rtimercnt; ++i)	760	for (i = 0; i < timercnt; ++i)
458	rtimers [i]->at += ev_now - now;	761	timers [i]->at += diff;
		762	}
459		763
460	now = ev_now;	764	now = ev_now;
461	}	765	}
462	}	766	}
463		767
464	int ev_loop_done;	768	int ev_loop_done;
465		769
466	void ev_loop (int flags)	770	void ev_loop (int flags)
467	{	771	{
468	double block;	772	double block;
469	ev_loop_done = flags & EVLOOP_ONESHOT;	773	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
470
471	if (checkcnt)
472	{
473	queue_events (checks, checkcnt, EV_CHECK);
474	call_pending ();
475	}
476		774
477	do	775	do
478	{	776	{
		777	/* queue check watchers (and execute them) */
		778	if (expect_false (preparecnt))
		779	{
		780	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		781	call_pending ();
		782	}
		783
479	/* update fd-related kernel structures */	784	/* update fd-related kernel structures */
480	fd_reify ();	785	fd_reify ();
481		786
482	/* calculate blocking time */	787	/* calculate blocking time */
		788
		789	/* we only need this for !monotonic clockor timers, but as we basically
		790	always have timers, we just calculate it always */
		791	#if EV_USE_MONOTONIC
		792	if (expect_true (have_monotonic))
		793	time_update_monotonic ();
		794	else
		795	#endif
		796	{
		797	ev_now = ev_time ();
		798	now = ev_now;
		799	}
		800
483	if (flags & EVLOOP_NONBLOCK || idlecnt)	801	if (flags & EVLOOP_NONBLOCK || idlecnt)
484	block = 0.;	802	block = 0.;
485	else	803	else
486	{	804	{
487	block = MAX_BLOCKTIME;	805	block = MAX_BLOCKTIME;
488		806
489	if (rtimercnt)	807	if (timercnt)
490	{	808	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	809	ev_tstamp to = timers [0]->at - now + method_fudge;
492	if (block > to) block = to;	810	if (block > to) block = to;
493	}	811	}
494		812
495	if (atimercnt)	813	if (periodiccnt)
496	{	814	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	815	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
498	if (block > to) block = to;	816	if (block > to) block = to;
499	}	817	}
500		818
501	if (block < 0.) block = 0.;	819	if (block < 0.) block = 0.;
502	}	820	}
…		…
505		823
506	/* update ev_now, do magic */	824	/* update ev_now, do magic */
507	time_update ();	825	time_update ();
508		826
509	/* queue pending timers and reschedule them */	827	/* queue pending timers and reschedule them */
510	/* absolute timers first */	828	timers_reify (); /* relative timers called last */
511	timers_reify (atimers, atimercnt, ev_now);	829	periodics_reify (); /* absolute timers called first */
512	/* relative timers second */
513	timers_reify (rtimers, rtimercnt, now);
514		830
515	/* queue idle watchers unless io or timers are pending */	831	/* queue idle watchers unless io or timers are pending */
516	if (!pendingcnt)	832	if (!pendingcnt)
517	queue_events (idles, idlecnt, EV_IDLE);	833	queue_events ((W *)idles, idlecnt, EV_IDLE);
518		834
519	/* queue check and possibly idle watchers */	835	/* queue check watchers, to be executed first */
		836	if (checkcnt)
520	queue_events (checks, checkcnt, EV_CHECK);	837	queue_events ((W *)checks, checkcnt, EV_CHECK);
521		838
522	call_pending ();	839	call_pending ();
523	}	840	}
524	while (!ev_loop_done);	841	while (!ev_loop_done);
525	}
526		842
527	/*****************************************************************************/	843	if (ev_loop_done != 2)
		844	ev_loop_done = 0;
		845	}
528		846
		847	/*****************************************************************************/
		848
529	static void	849	static void
530	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	850	wlist_add (WL *head, WL elem)
531	{	851	{
532	elem->next = *head;	852	elem->next = *head;
533	*head = elem;	853	*head = elem;
534	}	854	}
535		855
536	static void	856	static void
537	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	857	wlist_del (WL *head, WL elem)
538	{	858	{
539	while (*head)	859	while (*head)
540	{	860	{
541	if (*head == elem)	861	if (*head == elem)
542	{	862	{
…		…
547	head = &(*head)->next;	867	head = &(*head)->next;
548	}	868	}
549	}	869	}
550		870
551	static void	871	static void
552	ev_start (struct ev_watcher *w, int active)	872	ev_clear_pending (W w)
553	{	873	{
		874	if (w->pending)
		875	{
		876	pendings [ABSPRI (w)][w->pending - 1].w = 0;
554	w->pending = 0;	877	w->pending = 0;
		878	}
		879	}
		880
		881	static void
		882	ev_start (W w, int active)
		883	{
		884	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		885	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		886
555	w->active = active;	887	w->active = active;
556	}	888	}
557		889
558	static void	890	static void
559	ev_stop (struct ev_watcher *w)	891	ev_stop (W w)
560	{	892	{
561	if (w->pending)
562	pendings [w->pending - 1].w = 0;
563
564	w->active = 0;	893	w->active = 0;
565	/* nop */
566	}	894	}
567		895
568	/*****************************************************************************/	896	/*****************************************************************************/
569		897
570	void	898	void
571	evio_start (struct ev_io *w)	899	ev_io_start (struct ev_io *w)
572	{	900	{
		901	int fd = w->fd;
		902
573	if (ev_is_active (w))	903	if (ev_is_active (w))
574	return;	904	return;
575		905
576	int fd = w->fd;	906	assert (("ev_io_start called with negative fd", fd >= 0));
577		907
578	ev_start ((struct ev_watcher *)w, 1);	908	ev_start ((W)w, 1);
579	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	909	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
580	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	910	wlist_add ((WL *)&anfds[fd].head, (WL)w);
581		911
582	++fdchangecnt;	912	fd_change (fd);
583	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
584	fdchanges [fdchangecnt - 1] = fd;
585	}	913	}
586		914
587	void	915	void
588	evio_stop (struct ev_io *w)	916	ev_io_stop (struct ev_io *w)
589	{	917	{
		918	ev_clear_pending ((W)w);
590	if (!ev_is_active (w))	919	if (!ev_is_active (w))
591	return;	920	return;
592		921
593	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	922	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
594	ev_stop ((struct ev_watcher *)w);	923	ev_stop ((W)w);
595		924
596	++fdchangecnt;	925	fd_change (w->fd);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = w->fd;
599	}	926	}
600		927
601	void	928	void
602	evtimer_start (struct ev_timer *w)	929	ev_timer_start (struct ev_timer *w)
603	{	930	{
604	if (ev_is_active (w))	931	if (ev_is_active (w))
605	return;	932	return;
606		933
607	if (w->is_abs)	934	w->at += now;
		935
		936	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		937
		938	ev_start ((W)w, ++timercnt);
		939	array_needsize (timers, timermax, timercnt, );
		940	timers [timercnt - 1] = w;
		941	upheap ((WT *)timers, timercnt - 1);
		942	}
		943
		944	void
		945	ev_timer_stop (struct ev_timer *w)
		946	{
		947	ev_clear_pending ((W)w);
		948	if (!ev_is_active (w))
		949	return;
		950
		951	if (w->active < timercnt--)
		952	{
		953	timers [w->active - 1] = timers [timercnt];
		954	downheap ((WT *)timers, timercnt, w->active - 1);
608	{	955	}
609	/* this formula differs from the one in timer_reify becuse we do not round up */	956
		957	w->at = w->repeat;
		958
		959	ev_stop ((W)w);
		960	}
		961
		962	void
		963	ev_timer_again (struct ev_timer *w)
		964	{
		965	if (ev_is_active (w))
		966	{
610	if (w->repeat)	967	if (w->repeat)
		968	{
		969	w->at = now + w->repeat;
		970	downheap ((WT *)timers, timercnt, w->active - 1);
		971	}
		972	else
		973	ev_timer_stop (w);
		974	}
		975	else if (w->repeat)
		976	ev_timer_start (w);
		977	}
		978
		979	void
		980	ev_periodic_start (struct ev_periodic *w)
		981	{
		982	if (ev_is_active (w))
		983	return;
		984
		985	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		986
		987	/* this formula differs from the one in periodic_reify because we do not always round up */
		988	if (w->interval)
611	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	989	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
612		990
613	ev_start ((struct ev_watcher *)w, ++atimercnt);	991	ev_start ((W)w, ++periodiccnt);
614	array_needsize (atimers, atimermax, atimercnt, );	992	array_needsize (periodics, periodicmax, periodiccnt, );
615	atimers [atimercnt - 1] = w;	993	periodics [periodiccnt - 1] = w;
616	upheap (atimers, atimercnt - 1);	994	upheap ((WT *)periodics, periodiccnt - 1);
617	}
618	else
619	{
620	w->at += now;
621
622	ev_start ((struct ev_watcher *)w, ++rtimercnt);
623	array_needsize (rtimers, rtimermax, rtimercnt, );
624	rtimers [rtimercnt - 1] = w;
625	upheap (rtimers, rtimercnt - 1);
626	}
627
628	}	995	}
629		996
630	void	997	void
631	evtimer_stop (struct ev_timer *w)	998	ev_periodic_stop (struct ev_periodic *w)
632	{	999	{
		1000	ev_clear_pending ((W)w);
633	if (!ev_is_active (w))	1001	if (!ev_is_active (w))
634	return;	1002	return;
635		1003
636	if (w->is_abs)
637	{
638	if (w->active < atimercnt--)	1004	if (w->active < periodiccnt--)
639	{
640	atimers [w->active - 1] = atimers [atimercnt];
641	downheap (atimers, atimercnt, w->active - 1);
642	}
643	}	1005	{
644	else	1006	periodics [w->active - 1] = periodics [periodiccnt];
		1007	downheap ((WT *)periodics, periodiccnt, w->active - 1);
645	{	1008	}
646	if (w->active < rtimercnt--)
647	{
648	rtimers [w->active - 1] = rtimers [rtimercnt];
649	downheap (rtimers, rtimercnt, w->active - 1);
650	}
651	}
652		1009
653	ev_stop ((struct ev_watcher *)w);	1010	ev_stop ((W)w);
654	}	1011	}
655		1012
656	void	1013	void
657	evsignal_start (struct ev_signal *w)	1014	ev_signal_start (struct ev_signal *w)
658	{	1015	{
659	if (ev_is_active (w))	1016	if (ev_is_active (w))
660	return;	1017	return;
661		1018
662	ev_start ((struct ev_watcher *)w, 1);	1019	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1020
		1021	ev_start ((W)w, 1);
663	array_needsize (signals, signalmax, w->signum, signals_init);	1022	array_needsize (signals, signalmax, w->signum, signals_init);
664	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1023	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
665		1024
666	if (!w->next)	1025	if (!w->next)
667	{	1026	{
668	struct sigaction sa;	1027	struct sigaction sa;
669	sa.sa_handler = sighandler;	1028	sa.sa_handler = sighandler;
…		…
672	sigaction (w->signum, &sa, 0);	1031	sigaction (w->signum, &sa, 0);
673	}	1032	}
674	}	1033	}
675		1034
676	void	1035	void
677	evsignal_stop (struct ev_signal *w)	1036	ev_signal_stop (struct ev_signal *w)
678	{	1037	{
		1038	ev_clear_pending ((W)w);
679	if (!ev_is_active (w))	1039	if (!ev_is_active (w))
680	return;	1040	return;
681		1041
682	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1042	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
683	ev_stop ((struct ev_watcher *)w);	1043	ev_stop ((W)w);
684		1044
685	if (!signals [w->signum - 1].head)	1045	if (!signals [w->signum - 1].head)
686	signal (w->signum, SIG_DFL);	1046	signal (w->signum, SIG_DFL);
687	}	1047	}
688		1048
		1049	void
689	void evidle_start (struct ev_idle *w)	1050	ev_idle_start (struct ev_idle *w)
690	{	1051	{
691	if (ev_is_active (w))	1052	if (ev_is_active (w))
692	return;	1053	return;
693		1054
694	ev_start ((struct ev_watcher *)w, ++idlecnt);	1055	ev_start ((W)w, ++idlecnt);
695	array_needsize (idles, idlemax, idlecnt, );	1056	array_needsize (idles, idlemax, idlecnt, );
696	idles [idlecnt - 1] = w;	1057	idles [idlecnt - 1] = w;
697	}	1058	}
698		1059
		1060	void
699	void evidle_stop (struct ev_idle *w)	1061	ev_idle_stop (struct ev_idle *w)
700	{	1062	{
		1063	ev_clear_pending ((W)w);
		1064	if (ev_is_active (w))
		1065	return;
		1066
701	idles [w->active - 1] = idles [--idlecnt];	1067	idles [w->active - 1] = idles [--idlecnt];
702	ev_stop ((struct ev_watcher *)w);	1068	ev_stop ((W)w);
703	}	1069	}
704		1070
705	void evcheck_start (struct ev_check *w)	1071	void
		1072	ev_prepare_start (struct ev_prepare *w)
706	{	1073	{
707	if (ev_is_active (w))	1074	if (ev_is_active (w))
708	return;	1075	return;
709		1076
710	ev_start ((struct ev_watcher *)w, ++checkcnt);	1077	ev_start ((W)w, ++preparecnt);
		1078	array_needsize (prepares, preparemax, preparecnt, );
		1079	prepares [preparecnt - 1] = w;
		1080	}
		1081
		1082	void
		1083	ev_prepare_stop (struct ev_prepare *w)
		1084	{
		1085	ev_clear_pending ((W)w);
		1086	if (ev_is_active (w))
		1087	return;
		1088
		1089	prepares [w->active - 1] = prepares [--preparecnt];
		1090	ev_stop ((W)w);
		1091	}
		1092
		1093	void
		1094	ev_check_start (struct ev_check *w)
		1095	{
		1096	if (ev_is_active (w))
		1097	return;
		1098
		1099	ev_start ((W)w, ++checkcnt);
711	array_needsize (checks, checkmax, checkcnt, );	1100	array_needsize (checks, checkmax, checkcnt, );
712	checks [checkcnt - 1] = w;	1101	checks [checkcnt - 1] = w;
713	}	1102	}
714		1103
		1104	void
715	void evcheck_stop (struct ev_check *w)	1105	ev_check_stop (struct ev_check *w)
716	{	1106	{
		1107	ev_clear_pending ((W)w);
		1108	if (ev_is_active (w))
		1109	return;
		1110
717	checks [w->active - 1] = checks [--checkcnt];	1111	checks [w->active - 1] = checks [--checkcnt];
718	ev_stop ((struct ev_watcher *)w);	1112	ev_stop ((W)w);
719	}	1113	}
720		1114
		1115	void
		1116	ev_child_start (struct ev_child *w)
		1117	{
		1118	if (ev_is_active (w))
		1119	return;
		1120
		1121	ev_start ((W)w, 1);
		1122	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1123	}
		1124
		1125	void
		1126	ev_child_stop (struct ev_child *w)
		1127	{
		1128	ev_clear_pending ((W)w);
		1129	if (ev_is_active (w))
		1130	return;
		1131
		1132	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1133	ev_stop ((W)w);
		1134	}
		1135
721	/*****************************************************************************/	1136	/*****************************************************************************/
		1137
		1138	struct ev_once
		1139	{
		1140	struct ev_io io;
		1141	struct ev_timer to;
		1142	void (*cb)(int revents, void *arg);
		1143	void *arg;
		1144	};
		1145
		1146	static void
		1147	once_cb (struct ev_once *once, int revents)
		1148	{
		1149	void (*cb)(int revents, void *arg) = once->cb;
		1150	void *arg = once->arg;
		1151
		1152	ev_io_stop (&once->io);
		1153	ev_timer_stop (&once->to);
		1154	free (once);
		1155
		1156	cb (revents, arg);
		1157	}
		1158
		1159	static void
		1160	once_cb_io (struct ev_io *w, int revents)
		1161	{
		1162	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1163	}
		1164
		1165	static void
		1166	once_cb_to (struct ev_timer *w, int revents)
		1167	{
		1168	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1169	}
		1170
		1171	void
		1172	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1173	{
		1174	struct ev_once *once = malloc (sizeof (struct ev_once));
		1175
		1176	if (!once)
		1177	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1178	else
		1179	{
		1180	once->cb = cb;
		1181	once->arg = arg;
		1182
		1183	ev_watcher_init (&once->io, once_cb_io);
		1184	if (fd >= 0)
		1185	{
		1186	ev_io_set (&once->io, fd, events);
		1187	ev_io_start (&once->io);
		1188	}
		1189
		1190	ev_watcher_init (&once->to, once_cb_to);
		1191	if (timeout >= 0.)
		1192	{
		1193	ev_timer_set (&once->to, timeout, 0.);
		1194	ev_timer_start (&once->to);
		1195	}
		1196	}
		1197	}
		1198
		1199	/*****************************************************************************/
		1200
722	#if 1	1201	#if 0
		1202
		1203	struct ev_io wio;
723		1204
724	static void	1205	static void
725	sin_cb (struct ev_io *w, int revents)	1206	sin_cb (struct ev_io *w, int revents)
726	{	1207	{
727	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1208	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
729		1210
730	static void	1211	static void
731	ocb (struct ev_timer *w, int revents)	1212	ocb (struct ev_timer *w, int revents)
732	{	1213	{
733	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1214	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
734	evtimer_stop (w);	1215	ev_timer_stop (w);
735	evtimer_start (w);	1216	ev_timer_start (w);
736	}	1217	}
737		1218
738	static void	1219	static void
739	scb (struct ev_signal *w, int revents)	1220	scb (struct ev_signal *w, int revents)
740	{	1221	{
741	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1222	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1223	ev_io_stop (&wio);
		1224	ev_io_start (&wio);
742	}	1225	}
743		1226
744	static void	1227	static void
745	gcb (struct ev_signal *w, int revents)	1228	gcb (struct ev_signal *w, int revents)
746	{	1229	{
747	fprintf (stderr, "generic %x\n", revents);	1230	fprintf (stderr, "generic %x\n", revents);
		1231
748	}	1232	}
749		1233
750	int main (void)	1234	int main (void)
751	{	1235	{
752	struct ev_io sin;
753
754	ev_init (0);	1236	ev_init (0);
755		1237
756	evw_init (&sin, sin_cb, 55);
757	evio_set (&sin, 0, EV_READ);	1238	ev_io_init (&wio, sin_cb, 0, EV_READ);
758	evio_start (&sin);	1239	ev_io_start (&wio);
759		1240
760	struct ev_timer t[10000];	1241	struct ev_timer t[10000];
761		1242
762	#if 0	1243	#if 0
763	int i;	1244	int i;
764	for (i = 0; i < 10000; ++i)	1245	for (i = 0; i < 10000; ++i)
765	{	1246	{
766	struct ev_timer *w = t + i;	1247	struct ev_timer *w = t + i;
767	evw_init (w, ocb, i);	1248	ev_watcher_init (w, ocb, i);
768	evtimer_set_abs (w, drand48 (), 0.99775533);	1249	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
769	evtimer_start (w);	1250	ev_timer_start (w);
770	if (drand48 () < 0.5)	1251	if (drand48 () < 0.5)
771	evtimer_stop (w);	1252	ev_timer_stop (w);
772	}	1253	}
773	#endif	1254	#endif
774		1255
775	struct ev_timer t1;	1256	struct ev_timer t1;
776	evw_init (&t1, ocb, 0);	1257	ev_timer_init (&t1, ocb, 5, 10);
777	evtimer_set_abs (&t1, 5, 10);
778	evtimer_start (&t1);	1258	ev_timer_start (&t1);
779		1259
780	struct ev_signal sig;	1260	struct ev_signal sig;
781	evw_init (&sig, scb, 65535);
782	evsignal_set (&sig, SIGQUIT);	1261	ev_signal_init (&sig, scb, SIGQUIT);
783	evsignal_start (&sig);	1262	ev_signal_start (&sig);
784		1263
785	struct ev_check cw;	1264	struct ev_check cw;
786	evw_init (&cw, gcb, 0);	1265	ev_check_init (&cw, gcb);
787	evcheck_start (&cw);	1266	ev_check_start (&cw);
788		1267
789	struct ev_idle iw;	1268	struct ev_idle iw;
790	evw_init (&iw, gcb, 0);	1269	ev_idle_init (&iw, gcb);
791	evidle_start (&iw);	1270	ev_idle_start (&iw);
792		1271
793	ev_loop (0);	1272	ev_loop (0);
794		1273
795	return 0;	1274	return 0;
796	}	1275	}

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