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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 1.46 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
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
…		…
214	signals [signum - 1].gotsig = 1;	414	signals [signum - 1].gotsig = 1;
215		415
216	if (!gotsig)	416	if (!gotsig)
217	{	417	{
218	gotsig = 1;	418	gotsig = 1;
219	write (sigpipe [1], &gotsig, 1);	419	write (sigpipe [1], &signum, 1);
220	}	420	}
221	}	421	}
222		422
223	static void	423	static void
224	sigcb (struct ev_io *iow, int revents)	424	sigcb (struct ev_io *iow, int revents)
225	{	425	{
226	struct ev_signal *w;	426	struct ev_signal *w;
227	int sig;	427	int signum;
228		428
		429	read (sigpipe [0], &revents, 1);
229	gotsig = 0;	430	gotsig = 0;
230	read (sigpipe [0], &revents, 1);
231		431
232	for (sig = signalmax; sig--; )	432	for (signum = signalmax; signum--; )
233	if (signals [sig].gotsig)	433	if (signals [signum].gotsig)
234	{	434	{
235	signals [sig].gotsig = 0;	435	signals [signum].gotsig = 0;
236		436
237	for (w = signals [sig].head; w; w = w->next)	437	for (w = signals [signum].head; w; w = w->next)
238	event ((struct ev_watcher *)w, EV_SIGNAL);	438	event ((W)w, EV_SIGNAL);
239	}	439	}
240	}	440	}
241		441
242	static void	442	static void
243	siginit (void)	443	siginit (void)
244	{	444	{
		445	#ifndef WIN32
245	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	446	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
246	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	447	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
247		448
248	/* rather than sort out wether we really need nb, set it */	449	/* rather than sort out wether we really need nb, set it */
249	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	450	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
250	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	451	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		452	#endif
251		453
252	evio_set (&sigev, sigpipe [0], EV_READ);	454	ev_io_set (&sigev, sigpipe [0], EV_READ);
253	evio_start (&sigev);	455	ev_io_start (&sigev);
254	}	456	}
255		457
		458	/*****************************************************************************/
		459
		460	static struct ev_idle **idles;
		461	static int idlemax, idlecnt;
		462
		463	static struct ev_prepare **prepares;
		464	static int preparemax, preparecnt;
		465
		466	static struct ev_check **checks;
		467	static int checkmax, checkcnt;
		468
		469	/*****************************************************************************/
		470
		471	static struct ev_child *childs [PID_HASHSIZE];
		472	static struct ev_signal childev;
		473
		474	#ifndef WIN32
		475
		476	#ifndef WCONTINUED
		477	# define WCONTINUED 0
		478	#endif
		479
		480	static void
		481	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
256	#if HAVE_EPOLL	503	#if EV_USE_EPOLL
257	# include "ev_epoll.c"	504	# include "ev_epoll.c"
258	#endif	505	#endif
		506	#if EV_USE_POLL
		507	# include "ev_poll.c"
		508	#endif
259	#if HAVE_SELECT	509	#if EV_USE_SELECT
260	# include "ev_select.c"	510	# include "ev_select.c"
261	#endif	511	#endif
262		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
263	int ev_init (int flags)	533	int ev_init (int methods)
264	{	534	{
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)	535	if (!ev_method)
		536	{
		537	#if EV_USE_MONOTONIC
289	{	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	{
290	evw_init (&sigev, sigcb, 0);	575	ev_watcher_init (&sigev, sigcb);
291	siginit ();	576	siginit ();
		577
		578	#ifndef WIN32
		579	ev_signal_init (&childev, childcb, SIGCHLD);
		580	ev_signal_start (&childev);
		581	#endif
		582	}
292	}	583	}
293		584
294	return ev_method;	585	return ev_method;
295	}	586	}
296		587
297	void ev_prefork (void)	588	/*****************************************************************************/
298	{
299	}
300		589
		590	void
		591	ev_fork_prepare (void)
		592	{
		593	/* nop */
		594	}
		595
		596	void
301	void ev_postfork_parent (void)	597	ev_fork_parent (void)
302	{	598	{
		599	/* nop */
303	}	600	}
304		601
		602	void
305	void ev_postfork_child (void)	603	ev_fork_child (void)
306	{	604	{
307	#if HAVE_EPOLL	605	#if EV_USE_EPOLL
308	if (ev_method == EVMETHOD_EPOLL)	606	if (ev_method == EVMETHOD_EPOLL)
309	epoll_postfork_child ();	607	epoll_postfork_child ();
310	#endif	608	#endif
311		609
312	evio_stop (&sigev);	610	ev_io_stop (&sigev);
313	close (sigpipe [0]);	611	close (sigpipe [0]);
314	close (sigpipe [1]);	612	close (sigpipe [1]);
315	pipe (sigpipe);	613	pipe (sigpipe);
316	siginit ();	614	siginit ();
317	}	615	}
318		616
		617	/*****************************************************************************/
		618
319	static void	619	static void
320	fd_reify (void)	620	call_pending (void)
321	{	621	{
322	int i;	622	int pri;
323		623
324	for (i = 0; i < fdchangecnt; ++i)	624	for (pri = NUMPRI; pri--; )
325	{	625	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	{	626	{
337	method_modify (fd, anfd->wev, wev);	627	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
338	anfd->wev = wev;
339	}
340	}
341		628
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)	629	if (p->w)
355	{	630	{
356	p->w->pending = 0;	631	p->w->pending = 0;
357	p->w->cb (p->w, p->events);	632	p->w->cb (p->w, p->events);
358	}	633	}
359	}	634	}
360
361	pendingcnt = 0;
362	}	635	}
363		636
364	static void	637	static void
365	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	638	timers_reify (void)
366	{	639	{
367	while (timercnt && timers [0]->at <= now)	640	while (timercnt && timers [0]->at <= now)
368	{	641	{
369	struct ev_timer *w = timers [0];	642	struct ev_timer *w = timers [0];
370		643
371	/* first reschedule or stop timer */	644	/* first reschedule or stop timer */
372	if (w->repeat)	645	if (w->repeat)
373	{	646	{
374	if (w->is_abs)	647	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;	648	w->at = now + w->repeat;
378
379	assert (w->at > now);
380
381	downheap (timers, timercnt, 0);	649	downheap ((WT *)timers, timercnt, 0);
382	}	650	}
383	else	651	else
384	{
385	evtimer_stop (w); /* nonrepeating: stop timer */	652	ev_timer_stop (w); /* nonrepeating: stop timer */
386	--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)
387	}	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 */
388		674
389	event ((struct ev_watcher *)w, EV_TIMEOUT);	675	event ((W)w, EV_PERIODIC);
390	}	676	}
391	}	677	}
392		678
393	static void	679	static void
394	time_update ()	680	periodics_reschedule (ev_tstamp diff)
395	{	681	{
396	int i;	682	int i;
397	ev_now = ev_time ();
398		683
399	if (have_monotonic)	684	/* adjust periodics after time jump */
		685	for (i = 0; i < periodiccnt; ++i)
400	{	686	{
401	ev_tstamp odiff = diff;	687	struct ev_periodic *w = periodics [i];
402		688
403	/* detecting time jumps is much more difficult */	689	if (w->interval)
404	for (i = 2; --i; ) /* loop a few times, before making important decisions */
405	{
406	now = get_clock ();
407	diff = ev_now - now;
408
409	if (fabs (odiff - diff) < MIN_TIMEJUMP)
410	return; /* all is well */
411
412	ev_now = ev_time ();
413	}	690	{
		691	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
414		692
415	/* time jump detected, reschedule atimers */	693	if (fabs (diff) >= 1e-4)
416	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	}
417	{	700	}
418	struct ev_timer *w = atimers [i];	701	}
419	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	702	}
420	}	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;
421	}	713	}
422	else	714	else
423	{	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
424	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))
425	/* 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 */
426	for (i = 0; i < rtimercnt; ++i)	760	for (i = 0; i < timercnt; ++i)
427	rtimers [i]->at += ev_now - now;	761	timers [i]->at += diff;
		762	}
428		763
429	now = ev_now;	764	now = ev_now;
430	}	765	}
431	}	766	}
432		767
433	int ev_loop_done;	768	int ev_loop_done;
434		769
435	void ev_loop (int flags)	770	void ev_loop (int flags)
436	{	771	{
437	double block;	772	double block;
438	ev_loop_done = flags & EVLOOP_ONESHOT;	773	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
439		774
440	do	775	do
441	{	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
442	/* update fd-related kernel structures */	784	/* update fd-related kernel structures */
443	fd_reify ();	785	fd_reify ();
444		786
445	/* 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
446	if (flags & EVLOOP_NONBLOCK)	801	if (flags & EVLOOP_NONBLOCK || idlecnt)
447	block = 0.;	802	block = 0.;
448	else	803	else
449	{	804	{
450	block = MAX_BLOCKTIME;	805	block = MAX_BLOCKTIME;
451		806
452	if (rtimercnt)	807	if (timercnt)
453	{	808	{
454	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	809	ev_tstamp to = timers [0]->at - now + method_fudge;
455	if (block > to) block = to;	810	if (block > to) block = to;
456	}	811	}
457		812
458	if (atimercnt)	813	if (periodiccnt)
459	{	814	{
460	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	815	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
461	if (block > to) block = to;	816	if (block > to) block = to;
462	}	817	}
463		818
464	if (block < 0.) block = 0.;	819	if (block < 0.) block = 0.;
465	}	820	}
…		…
467	method_poll (block);	822	method_poll (block);
468		823
469	/* update ev_now, do magic */	824	/* update ev_now, do magic */
470	time_update ();	825	time_update ();
471		826
472	/* put pending timers into pendign queue and reschedule them */	827	/* queue pending timers and reschedule them */
473	/* absolute timers first */	828	timers_reify (); /* relative timers called last */
474	timers_reify (atimers, atimercnt, ev_now);	829	periodics_reify (); /* absolute timers called first */
475	/* relative timers second */	830
476	timers_reify (rtimers, rtimercnt, now);	831	/* queue idle watchers unless io or timers are pending */
		832	if (!pendingcnt)
		833	queue_events ((W *)idles, idlecnt, EV_IDLE);
		834
		835	/* queue check watchers, to be executed first */
		836	if (checkcnt)
		837	queue_events ((W *)checks, checkcnt, EV_CHECK);
477		838
478	call_pending ();	839	call_pending ();
479	}	840	}
480	while (!ev_loop_done);	841	while (!ev_loop_done);
481	}
482		842
		843	if (ev_loop_done != 2)
		844	ev_loop_done = 0;
		845	}
		846
		847	/*****************************************************************************/
		848
483	static void	849	static void
484	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	850	wlist_add (WL *head, WL elem)
485	{	851	{
486	elem->next = *head;	852	elem->next = *head;
487	*head = elem;	853	*head = elem;
488	}	854	}
489		855
490	static void	856	static void
491	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	857	wlist_del (WL *head, WL elem)
492	{	858	{
493	while (*head)	859	while (*head)
494	{	860	{
495	if (*head == elem)	861	if (*head == elem)
496	{	862	{
…		…
501	head = &(*head)->next;	867	head = &(*head)->next;
502	}	868	}
503	}	869	}
504		870
505	static void	871	static void
506	ev_start (struct ev_watcher *w, int active)	872	ev_clear_pending (W w)
507	{	873	{
		874	if (w->pending)
		875	{
		876	pendings [ABSPRI (w)][w->pending - 1].w = 0;
508	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
509	w->active = active;	887	w->active = active;
510	}	888	}
511		889
512	static void	890	static void
513	ev_stop (struct ev_watcher *w)	891	ev_stop (W w)
514	{	892	{
515	if (w->pending)
516	pendings [w->pending - 1].w = 0;
517
518	w->active = 0;	893	w->active = 0;
519	/* nop */
520	}	894	}
521		895
		896	/*****************************************************************************/
		897
522	void	898	void
523	evio_start (struct ev_io *w)	899	ev_io_start (struct ev_io *w)
524	{	900	{
		901	int fd = w->fd;
		902
525	if (ev_is_active (w))	903	if (ev_is_active (w))
526	return;	904	return;
527		905
528	int fd = w->fd;	906	assert (("ev_io_start called with negative fd", fd >= 0));
529		907
530	ev_start ((struct ev_watcher *)w, 1);	908	ev_start ((W)w, 1);
531	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	909	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
532	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	910	wlist_add ((WL *)&anfds[fd].head, (WL)w);
533		911
534	++fdchangecnt;	912	fd_change (fd);
535	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536	fdchanges [fdchangecnt - 1] = fd;
537	}	913	}
538		914
539	void	915	void
540	evio_stop (struct ev_io *w)	916	ev_io_stop (struct ev_io *w)
541	{	917	{
		918	ev_clear_pending ((W)w);
542	if (!ev_is_active (w))	919	if (!ev_is_active (w))
543	return;	920	return;
544		921
545	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);
546	ev_stop ((struct ev_watcher *)w);	923	ev_stop ((W)w);
547		924
548	++fdchangecnt;	925	fd_change (w->fd);
549	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550	fdchanges [fdchangecnt - 1] = w->fd;
551	}	926	}
552		927
553	void	928	void
554	evtimer_start (struct ev_timer *w)	929	ev_timer_start (struct ev_timer *w)
555	{	930	{
556	if (ev_is_active (w))	931	if (ev_is_active (w))
557	return;	932	return;
558		933
559	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);
560	{	955	}
561	/* 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	{
562	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)
563	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	989	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
564		990
565	ev_start ((struct ev_watcher *)w, ++atimercnt);	991	ev_start ((W)w, ++periodiccnt);
566	array_needsize (atimers, atimermax, atimercnt, );	992	array_needsize (periodics, periodicmax, periodiccnt, );
567	atimers [atimercnt - 1] = w;	993	periodics [periodiccnt - 1] = w;
568	upheap (atimers, atimercnt - 1);	994	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	}	995	}
581		996
582	void	997	void
583	evtimer_stop (struct ev_timer *w)	998	ev_periodic_stop (struct ev_periodic *w)
584	{	999	{
		1000	ev_clear_pending ((W)w);
585	if (!ev_is_active (w))	1001	if (!ev_is_active (w))
586	return;	1002	return;
587		1003
588	if (w->is_abs)
589	{
590	if (w->active < atimercnt--)	1004	if (w->active < periodiccnt--)
591	{
592	atimers [w->active - 1] = atimers [atimercnt];
593	downheap (atimers, atimercnt, w->active - 1);
594	}
595	}	1005	{
596	else	1006	periodics [w->active - 1] = periodics [periodiccnt];
		1007	downheap ((WT *)periodics, periodiccnt, w->active - 1);
597	{	1008	}
598	if (w->active < rtimercnt--)
599	{
600	rtimers [w->active - 1] = rtimers [rtimercnt];
601	downheap (rtimers, rtimercnt, w->active - 1);
602	}
603	}
604		1009
605	ev_stop ((struct ev_watcher *)w);	1010	ev_stop ((W)w);
606	}	1011	}
607		1012
608	void	1013	void
609	evsignal_start (struct ev_signal *w)	1014	ev_signal_start (struct ev_signal *w)
610	{	1015	{
611	if (ev_is_active (w))	1016	if (ev_is_active (w))
612	return;	1017	return;
613		1018
614	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);
615	array_needsize (signals, signalmax, w->signum, signals_init);	1022	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);	1023	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
617		1024
618	if (!w->next)	1025	if (!w->next)
619	{	1026	{
620	struct sigaction sa;	1027	struct sigaction sa;
621	sa.sa_handler = sighandler;	1028	sa.sa_handler = sighandler;
…		…
624	sigaction (w->signum, &sa, 0);	1031	sigaction (w->signum, &sa, 0);
625	}	1032	}
626	}	1033	}
627		1034
628	void	1035	void
629	evsignal_stop (struct ev_signal *w)	1036	ev_signal_stop (struct ev_signal *w)
630	{	1037	{
		1038	ev_clear_pending ((W)w);
631	if (!ev_is_active (w))	1039	if (!ev_is_active (w))
632	return;	1040	return;
633		1041
634	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);
635	ev_stop ((struct ev_watcher *)w);	1043	ev_stop ((W)w);
636		1044
637	if (!signals [w->signum - 1].head)	1045	if (!signals [w->signum - 1].head)
638	signal (w->signum, SIG_DFL);	1046	signal (w->signum, SIG_DFL);
639	}	1047	}
640		1048
		1049	void
		1050	ev_idle_start (struct ev_idle *w)
		1051	{
		1052	if (ev_is_active (w))
		1053	return;
		1054
		1055	ev_start ((W)w, ++idlecnt);
		1056	array_needsize (idles, idlemax, idlecnt, );
		1057	idles [idlecnt - 1] = w;
		1058	}
		1059
		1060	void
		1061	ev_idle_stop (struct ev_idle *w)
		1062	{
		1063	ev_clear_pending ((W)w);
		1064	if (ev_is_active (w))
		1065	return;
		1066
		1067	idles [w->active - 1] = idles [--idlecnt];
		1068	ev_stop ((W)w);
		1069	}
		1070
		1071	void
		1072	ev_prepare_start (struct ev_prepare *w)
		1073	{
		1074	if (ev_is_active (w))
		1075	return;
		1076
		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);
		1100	array_needsize (checks, checkmax, checkcnt, );
		1101	checks [checkcnt - 1] = w;
		1102	}
		1103
		1104	void
		1105	ev_check_stop (struct ev_check *w)
		1106	{
		1107	ev_clear_pending ((W)w);
		1108	if (ev_is_active (w))
		1109	return;
		1110
		1111	checks [w->active - 1] = checks [--checkcnt];
		1112	ev_stop ((W)w);
		1113	}
		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
641	/*****************************************************************************/	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
642	#if 1	1201	#if 0
		1202
		1203	struct ev_io wio;
643		1204
644	static void	1205	static void
645	sin_cb (struct ev_io *w, int revents)	1206	sin_cb (struct ev_io *w, int revents)
646	{	1207	{
647	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1208	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
649		1210
650	static void	1211	static void
651	ocb (struct ev_timer *w, int revents)	1212	ocb (struct ev_timer *w, int revents)
652	{	1213	{
653	//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);
654	evtimer_stop (w);	1215	ev_timer_stop (w);
655	evtimer_start (w);	1216	ev_timer_start (w);
656	}	1217	}
657		1218
658	static void	1219	static void
659	scb (struct ev_signal *w, int revents)	1220	scb (struct ev_signal *w, int revents)
660	{	1221	{
661	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);
		1225	}
		1226
		1227	static void
		1228	gcb (struct ev_signal *w, int revents)
		1229	{
		1230	fprintf (stderr, "generic %x\n", revents);
		1231
662	}	1232	}
663		1233
664	int main (void)	1234	int main (void)
665	{	1235	{
666	struct ev_io sin;
667
668	ev_init (0);	1236	ev_init (0);
669		1237
670	evw_init (&sin, sin_cb, 55);
671	evio_set (&sin, 0, EV_READ);	1238	ev_io_init (&wio, sin_cb, 0, EV_READ);
672	evio_start (&sin);	1239	ev_io_start (&wio);
673		1240
674	struct ev_timer t[10000];	1241	struct ev_timer t[10000];
675		1242
676	#if 0	1243	#if 0
677	int i;	1244	int i;
678	for (i = 0; i < 10000; ++i)	1245	for (i = 0; i < 10000; ++i)
679	{	1246	{
680	struct ev_timer *w = t + i;	1247	struct ev_timer *w = t + i;
681	evw_init (w, ocb, i);	1248	ev_watcher_init (w, ocb, i);
682	evtimer_set_abs (w, drand48 (), 0.99775533);	1249	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
683	evtimer_start (w);	1250	ev_timer_start (w);
684	if (drand48 () < 0.5)	1251	if (drand48 () < 0.5)
685	evtimer_stop (w);	1252	ev_timer_stop (w);
686	}	1253	}
687	#endif	1254	#endif
688		1255
689	struct ev_timer t1;	1256	struct ev_timer t1;
690	evw_init (&t1, ocb, 0);	1257	ev_timer_init (&t1, ocb, 5, 10);
691	evtimer_set_abs (&t1, 5, 10);
692	evtimer_start (&t1);	1258	ev_timer_start (&t1);
693		1259
694	struct ev_signal sig;	1260	struct ev_signal sig;
695	evw_init (&sig, scb, 65535);
696	evsignal_set (&sig, SIGQUIT);	1261	ev_signal_init (&sig, scb, SIGQUIT);
697	evsignal_start (&sig);	1262	ev_signal_start (&sig);
		1263
		1264	struct ev_check cw;
		1265	ev_check_init (&cw, gcb);
		1266	ev_check_start (&cw);
		1267
		1268	struct ev_idle iw;
		1269	ev_idle_init (&iw, gcb);
		1270	ev_idle_start (&iw);
698		1271
699	ev_loop (0);	1272	ev_loop (0);
700		1273
701	return 0;	1274	return 0;
702	}	1275	}

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