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Comparing libev/ev.c (file contents):
Revision 1.2 by root, Tue Oct 30 21:42:12 2007 UTC vs.
Revision 1.55 by root, Sun Nov 4 00:39:24 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33	#endif
		34
1	#include <math.h>	35	#include <math.h>
2	#include <stdlib.h>	36	#include <stdlib.h>
		37	#include <unistd.h>
		38	#include <fcntl.h>
		39	#include <signal.h>
		40	#include <stddef.h>
3		41
4	#include <stdio.h>	42	#include <stdio.h>
5		43
		44	#include <assert.h>
6	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
7	#include <sys/time.h>	50	#include <sys/time.h>
8	#include <time.h>	51	#include <time.h>
9		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_USEV_POLL
		64	# define EV_USEV_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
10	#ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
12	#endif	84	#endif
13		85
14	#define HAVE_EPOLL 1	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
15	#define HAVE_REALTIME 1	88	# define EV_USE_REALTIME 0
16	#define HAVE_SELECT 0	89	#endif
17		90
18	#define MAX_BLOCKTIME 60.	91	/**/
		92
		93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		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 */
19		97
20	#include "ev.h"	98	#include "ev.h"
21		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
22	struct ev_watcher {	114	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);	115	typedef struct ev_watcher_list *WL;
		116	typedef struct ev_watcher_time *WT;
		117
		118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		119
		120	/*****************************************************************************/
		121
		122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
24	};	141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
25		144
26	struct ev_watcher_list {	145	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		146
30	ev_tstamp ev_now;	147	# define VAR(name,decl) static decl;
31	int ev_method;	148	# include "ev_vars.h"
		149	# undef VAR
32		150
33	static int have_monotonic; /* runtime */	151	#endif
34		152
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	153	/*****************************************************************************/
36	static void (*method_reify)(void);
37	static void (*method_poll)(ev_tstamp timeout);
38		154
39	ev_tstamp	155	inline ev_tstamp
40	ev_time (void)	156	ev_time (void)
41	{	157	{
42	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
43	struct timespec ts;	159	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	162	#else
47	struct timeval tv;	163	struct timeval tv;
48	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	166	#endif
51	}	167	}
52		168
53	static ev_tstamp	169	inline ev_tstamp
54	get_clock (void)	170	get_clock (void)
55	{	171	{
56	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
57	if (have_monotonic)	173	if (expect_true (have_monotonic))
58	{	174	{
59	struct timespec ts;	175	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	178	}
63	#endif	179	#endif
64		180
65	return ev_time ();	181	return ev_time ();
66	}	182	}
67		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
		190	#define array_roundsize(base,n) ((n) | 4 & ~3)
		191
68	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
69	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
70	{ \	194	{ \
71	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	196	do \
		197	{ \
		198	newcnt = array_roundsize (base, newcnt << 1); \
		199	} \
		200	while ((cnt) > newcnt); \
		201	\
73	base = realloc (base, sizeof (*base) * (newcnt)); \	202	base = realloc (base, sizeof (*base) * (newcnt)); \
74	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
75	cur = newcnt; \	204	cur = newcnt; \
76	}	205	}
77		206
78	typedef struct	207	/*****************************************************************************/
79	{
80	struct ev_io *head;
81	unsigned char wev, rev; /* want, received event set */
82	} ANFD;
83
84	static ANFD *anfds;
85	static int anfdmax;
86
87	static int *fdchanges;
88	static int fdchangemax, fdchangecnt;
89		208
90	static void	209	static void
91	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
92	{	211	{
93	while (count--)	212	while (count--)
94	{	213	{
95	base->head = 0;	214	base->head = 0;
96	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
97	++base;	218	++base;
98	}	219	}
99	}	220	}
100		221
101	typedef struct
102	{
103	struct ev_watcher *w;
104	int events;
105	} ANPENDING;
106
107	static ANPENDING *pendings;
108	static int pendingmax, pendingcnt;
109
110	static void	222	static void
111	event (struct ev_watcher *w, int events)	223	event (EV_P_ W w, int events)
112	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		228	return;
		229	}
		230
113	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
114	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
115	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
116	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
117	}	235	}
118		236
119	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
120	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
121	{	248	{
122	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
123	struct ev_io *w;	250	struct ev_io *w;
124		251
125	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
126	{	253	{
127	int ev = w->events & events;	254	int ev = w->events & events;
128		255
129	if (ev)	256	if (ev)
130	event ((struct ev_watcher *)w, ev);	257	event (EV_A_ (W)w, ev);
		258	}
		259	}
		260
		261	/*****************************************************************************/
		262
		263	static void
		264	fd_reify (EV_P)
		265	{
		266	int i;
		267
		268	for (i = 0; i < fdchangecnt; ++i)
		269	{
		270	int fd = fdchanges [i];
		271	ANFD *anfd = anfds + fd;
		272	struct ev_io *w;
		273
		274	int events = 0;
		275
		276	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		277	events |= w->events;
		278
		279	anfd->reify = 0;
		280
		281	if (anfd->events != events)
		282	{
		283	method_modify (EV_A_ fd, anfd->events, events);
		284	anfd->events = events;
		285	}
		286	}
		287
		288	fdchangecnt = 0;
		289	}
		290
		291	static void
		292	fd_change (EV_P_ int fd)
		293	{
		294	if (anfds [fd].reify || fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		313	}
		314	}
		315
		316	/* called on EBADF to verify fds */
		317	static void
		318	fd_ebadf (EV_P)
		319	{
		320	int fd;
		321
		322	for (fd = 0; fd < anfdmax; ++fd)
		323	if (anfds [fd].events)
		324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
		336	{
		337	close (fd);
		338	fd_kill (EV_A_ fd);
		339	return;
131	}	340	}
132	}	341	}
133		342
134	static struct ev_timer **timers;	343	/*****************************************************************************/
135	static int timermax, timercnt;
136		344
137	static void	345	static void
138	upheap (int k)	346	upheap (WT *heap, int k)
139	{	347	{
140	struct ev_timer *w = timers [k];	348	WT w = heap [k];
141		349
142	while (k && timers [k >> 1]->at > w->at)	350	while (k && heap [k >> 1]->at > w->at)
143	{	351	{
144	timers [k] = timers [k >> 1];	352	heap [k] = heap [k >> 1];
145	timers [k]->active = k + 1;	353	heap [k]->active = k + 1;
146	k >>= 1;	354	k >>= 1;
147	}	355	}
148		356
149	timers [k] = w;	357	heap [k] = w;
150	timers [k]->active = k + 1;	358	heap [k]->active = k + 1;
151		359
152	}	360	}
153		361
154	static void	362	static void
155	downheap (int k)	363	downheap (WT *heap, int N, int k)
156	{	364	{
157	struct ev_timer *w = timers [k];	365	WT w = heap [k];
158		366
159	while (k < (timercnt >> 1))	367	while (k < (N >> 1))
160	{	368	{
161	int j = k << 1;	369	int j = k << 1;
162		370
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
164	++j;	372	++j;
165		373
166	if (w->at <= timers [j]->at)	374	if (w->at <= heap [j]->at)
167	break;	375	break;
168		376
169	timers [k] = timers [j];	377	heap [k] = heap [j];
170	timers [k]->active = k + 1;	378	heap [k]->active = k + 1;
171	k = j;	379	k = j;
172	}	380	}
173		381
174	timers [k] = w;	382	heap [k] = w;
175	timers [k]->active = k + 1;	383	heap [k]->active = k + 1;
176	}	384	}
177		385
178	static struct ev_signal **signals;	386	/*****************************************************************************/
		387
		388	typedef struct
		389	{
		390	struct ev_watcher_list *head;
		391	sig_atomic_t volatile gotsig;
		392	} ANSIG;
		393
		394	static ANSIG *signals;
179	static int signalmax, signalcnt;	395	static int signalmax;
180		396
		397	static int sigpipe [2];
		398	static sig_atomic_t volatile gotsig;
		399
181	static void	400	static void
182	signals_init (struct ev_signal **base, int count)	401	signals_init (ANSIG *base, int count)
183	{	402	{
184	while (count--)	403	while (count--)
185	*base++ = 0;	404	{
186	}	405	base->head = 0;
		406	base->gotsig = 0;
187		407
		408	++base;
		409	}
		410	}
		411
		412	static void
		413	sighandler (int signum)
		414	{
		415	signals [signum - 1].gotsig = 1;
		416
		417	if (!gotsig)
		418	{
		419	int old_errno = errno;
		420	gotsig = 1;
		421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
		423	}
		424	}
		425
		426	static void
		427	sigcb (EV_P_ struct ev_io *iow, int revents)
		428	{
		429	struct ev_watcher_list *w;
		430	int signum;
		431
		432	read (sigpipe [0], &revents, 1);
		433	gotsig = 0;
		434
		435	for (signum = signalmax; signum--; )
		436	if (signals [signum].gotsig)
		437	{
		438	signals [signum].gotsig = 0;
		439
		440	for (w = signals [signum].head; w; w = w->next)
		441	event (EV_A_ (W)w, EV_SIGNAL);
		442	}
		443	}
		444
		445	static void
		446	siginit (EV_P)
		447	{
		448	#ifndef WIN32
		449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		451
		452	/* rather than sort out wether we really need nb, set it */
		453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
		456
		457	ev_io_set (&sigev, sigpipe [0], EV_READ);
		458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
		460	}
		461
		462	/*****************************************************************************/
		463
		464	#ifndef WIN32
		465
		466	#ifndef WCONTINUED
		467	# define WCONTINUED 0
		468	#endif
		469
		470	static void
		471	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		472	{
		473	struct ev_child *w;
		474
		475	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		476	if (w->pid == pid || !w->pid)
		477	{
		478	w->priority = sw->priority; /* need to do it *now* */
		479	w->rpid = pid;
		480	w->rstatus = status;
		481	event (EV_A_ (W)w, EV_CHILD);
		482	}
		483	}
		484
		485	static void
		486	childcb (EV_P_ struct ev_signal *sw, int revents)
		487	{
		488	int pid, status;
		489
		490	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		491	{
		492	/* make sure we are called again until all childs have been reaped */
		493	event (EV_A_ (W)sw, EV_SIGNAL);
		494
		495	child_reap (EV_A_ sw, pid, pid, status);
		496	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		497	}
		498	}
		499
		500	#endif
		501
		502	/*****************************************************************************/
		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
188	#if HAVE_EPOLL	507	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	508	# include "ev_epoll.c"
190	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
191	#if HAVE_SELECT	513	#if EV_USE_SELECT
192	# include "ev_select.c"	514	# include "ev_select.c"
193	#endif	515	#endif
194		516
195	int ev_init (int flags)	517	int
		518	ev_version_major (void)
196	{	519	{
		520	return EV_VERSION_MAJOR;
		521	}
		522
		523	int
		524	ev_version_minor (void)
		525	{
		526	return EV_VERSION_MINOR;
		527	}
		528
		529	/* return true if we are running with elevated privileges and should ignore env variables */
		530	static int
		531	enable_secure (void)
		532	{
		533	#ifdef WIN32
		534	return 0;
		535	#else
		536	return getuid () != geteuid ()
		537	|| getgid () != getegid ();
		538	#endif
		539	}
		540
		541	int
		542	ev_method (EV_P)
		543	{
		544	return method;
		545	}
		546
		547	inline int
		548	loop_init (EV_P_ int methods)
		549	{
		550	if (!method)
		551	{
197	#if HAVE_MONOTONIC	552	#if EV_USE_MONOTONIC
198	{	553	{
199	struct timespec ts;	554	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	556	have_monotonic = 1;
202	}	557	}
203	#endif	558	#endif
204		559
205	ev_now = ev_time ();	560	rt_now = ev_time ();
		561	mn_now = get_clock ();
		562	now_floor = mn_now;
		563	rtmn_diff = rt_now - mn_now;
206		564
		565	if (pipe (sigpipe))
		566	return 0;
		567
		568	if (methods == EVMETHOD_AUTO)
		569	if (!enable_secure () && getenv ("LIBmethodS"))
		570	methods = atoi (getenv ("LIBmethodS"));
		571	else
		572	methods = EVMETHOD_ANY;
		573
		574	method = 0;
		575	#if EV_USE_KQUEUE
		576	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		577	#endif
207	#if HAVE_EPOLL	578	#if EV_USE_EPOLL
208	if (epoll_init (flags))	579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
209	return ev_method;
210	#endif	580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		583	#endif
211	#if HAVE_SELECT	584	#if EV_USE_SELECT
212	if (select_init (flags))	585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
213	return ev_method;
214	#endif	586	#endif
215		587
216	ev_method = EVMETHOD_NONE;	588	if (method)
217	return ev_method;
218	}
219
220	void ev_prefork (void)
221	{
222	}
223
224	void ev_postfork_parent (void)
225	{
226	}
227
228	void ev_postfork_child (void)
229	{
230	#if HAVE_EPOLL
231	epoll_postfork_child ();
232	#endif
233	}
234
235	static void
236	call_pending ()
237	{
238	int i;
239
240	for (i = 0; i < pendingcnt; ++i)
241	{
242	ANPENDING *p = pendings + i;
243
244	if (p->w)
245	{	589	{
246	p->w->pending = 0;	590	ev_watcher_init (&sigev, sigcb);
247	p->w->cb (p->w, p->events);	591	ev_set_priority (&sigev, EV_MAXPRI);
		592	siginit (EV_A);
		593
		594	#ifndef WIN32
		595	ev_signal_init (&childev, childcb, SIGCHLD);
		596	ev_set_priority (&childev, EV_MAXPRI);
		597	ev_signal_start (EV_A_ &childev);
		598	ev_unref (EV_A); /* child watcher should not keep loop alive */
		599	#endif
248	}	600	}
249	}	601	}
250		602
251	pendingcnt = 0;	603	return method;
252	}	604	}
253		605
		606	#if EV_MULTIPLICITY
		607
		608	struct ev_loop *
		609	ev_loop_new (int methods)
		610	{
		611	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		612
		613	if (loop_init (EV_A_ methods))
		614	return loop;
		615
		616	ev_loop_delete (loop);
		617
		618	return 0;
		619	}
		620
		621	void
		622	ev_loop_delete (EV_P)
		623	{
		624	/*TODO*/
		625	free (loop);
		626	}
		627
		628	#else
		629
		630	int
		631	ev_init (int methods)
		632	{
		633	return loop_init (methods);
		634	}
		635
		636	#endif
		637
		638	/*****************************************************************************/
		639
		640	void
		641	ev_fork_prepare (void)
		642	{
		643	/* nop */
		644	}
		645
		646	void
		647	ev_fork_parent (void)
		648	{
		649	/* nop */
		650	}
		651
		652	void
		653	ev_fork_child (void)
		654	{
		655	/*TODO*/
		656	#if !EV_MULTIPLICITY
		657	#if EV_USE_EPOLL
		658	if (method == EVMETHOD_EPOLL)
		659	epoll_postfork_child (EV_A);
		660	#endif
		661
		662	ev_io_stop (EV_A_ &sigev);
		663	close (sigpipe [0]);
		664	close (sigpipe [1]);
		665	pipe (sigpipe);
		666	siginit (EV_A);
		667	#endif
		668	}
		669
		670	/*****************************************************************************/
		671
254	static void	672	static void
		673	call_pending (EV_P)
		674	{
		675	int pri;
		676
		677	for (pri = NUMPRI; pri--; )
		678	while (pendingcnt [pri])
		679	{
		680	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		681
		682	if (p->w)
		683	{
		684	p->w->pending = 0;
		685	p->w->cb (EV_A_ p->w, p->events);
		686	}
		687	}
		688	}
		689
		690	static void
255	timer_reify (void)	691	timers_reify (EV_P)
256	{	692	{
257	while (timercnt && timers [0]->at <= ev_now)	693	while (timercnt && timers [0]->at <= mn_now)
258	{	694	{
259	struct ev_timer *w = timers [0];	695	struct ev_timer *w = timers [0];
260		696
261	fprintf (stderr, "0 %f, %d c%d\n", w->at, w->active, timercnt);//D
262	/* first reschedule timer */	697	/* first reschedule or stop timer */
263	if (w->repeat)	698	if (w->repeat)
264	{	699	{
265	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	700	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
266	if (w->is_abs)
267	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
268	else
269	w->at = ev_now + w->repeat;	701	w->at = mn_now + w->repeat;
270		702	downheap ((WT *)timers, timercnt, 0);
271	fprintf (stderr, "b %f\n", w->at);//D
272
273	downheap (0);
274	}	703	}
275	else	704	else
		705	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		706
		707	event (EV_A_ (W)w, EV_TIMEOUT);
		708	}
		709	}
		710
		711	static void
		712	periodics_reify (EV_P)
		713	{
		714	while (periodiccnt && periodics [0]->at <= rt_now)
		715	{
		716	struct ev_periodic *w = periodics [0];
		717
		718	/* first reschedule or stop timer */
		719	if (w->interval)
276	{	720	{
277	fprintf (stderr, "c %f, %d c%d\n", w->at, w->active, timercnt);//D	721	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
278	evtimer_stop (w); /* nonrepeating: stop timer */	722	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		723	downheap ((WT *)periodics, periodiccnt, 0);
279	}	724	}
		725	else
		726	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
280		727
281	event ((struct ev_watcher *)w, EV_TIMEOUT);	728	event (EV_A_ (W)w, EV_PERIODIC);
		729	}
		730	}
		731
		732	static void
		733	periodics_reschedule (EV_P)
		734	{
		735	int i;
		736
		737	/* adjust periodics after time jump */
		738	for (i = 0; i < periodiccnt; ++i)
282	}	739	{
283	}	740	struct ev_periodic *w = periodics [i];
284		741
285	int ev_loop_done;	742	if (w->interval)
		743	{
		744	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
286		745
		746	if (fabs (diff) >= 1e-4)
		747	{
		748	ev_periodic_stop (EV_A_ w);
		749	ev_periodic_start (EV_A_ w);
		750
		751	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		752	}
		753	}
		754	}
		755	}
		756
		757	inline int
		758	time_update_monotonic (EV_P)
		759	{
		760	mn_now = get_clock ();
		761
		762	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		763	{
		764	rt_now = rtmn_diff + mn_now;
		765	return 0;
		766	}
		767	else
		768	{
		769	now_floor = mn_now;
		770	rt_now = ev_time ();
		771	return 1;
		772	}
		773	}
		774
		775	static void
		776	time_update (EV_P)
		777	{
		778	int i;
		779
		780	#if EV_USE_MONOTONIC
		781	if (expect_true (have_monotonic))
		782	{
		783	if (time_update_monotonic (EV_A))
		784	{
		785	ev_tstamp odiff = rtmn_diff;
		786
		787	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		788	{
		789	rtmn_diff = rt_now - mn_now;
		790
		791	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		792	return; /* all is well */
		793
		794	rt_now = ev_time ();
		795	mn_now = get_clock ();
		796	now_floor = mn_now;
		797	}
		798
		799	periodics_reschedule (EV_A);
		800	/* no timer adjustment, as the monotonic clock doesn't jump */
		801	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		802	}
		803	}
		804	else
		805	#endif
		806	{
		807	rt_now = ev_time ();
		808
		809	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		810	{
		811	periodics_reschedule (EV_A);
		812
		813	/* adjust timers. this is easy, as the offset is the same for all */
		814	for (i = 0; i < timercnt; ++i)
		815	timers [i]->at += rt_now - mn_now;
		816	}
		817
		818	mn_now = rt_now;
		819	}
		820	}
		821
		822	void
		823	ev_ref (EV_P)
		824	{
		825	++activecnt;
		826	}
		827
		828	void
		829	ev_unref (EV_P)
		830	{
		831	--activecnt;
		832	}
		833
		834	static int loop_done;
		835
		836	void
287	int ev_loop (int flags)	837	ev_loop (EV_P_ int flags)
288	{	838	{
289	double block;	839	double block;
290	ev_loop_done = flags & EVLOOP_ONESHOT;	840	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
291		841
292	do	842	do
293	{	843	{
		844	/* queue check watchers (and execute them) */
		845	if (expect_false (preparecnt))
		846	{
		847	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		848	call_pending (EV_A);
		849	}
		850
294	/* update fd-related kernel structures */	851	/* update fd-related kernel structures */
295	method_reify (); fdchangecnt = 0;	852	fd_reify (EV_A);
296		853
297	/* calculate blocking time */	854	/* calculate blocking time */
		855
		856	/* we only need this for !monotonic clockor timers, but as we basically
		857	always have timers, we just calculate it always */
		858	#if EV_USE_MONOTONIC
		859	if (expect_true (have_monotonic))
		860	time_update_monotonic (EV_A);
		861	else
		862	#endif
		863	{
298	ev_now = ev_time ();	864	rt_now = ev_time ();
		865	mn_now = rt_now;
		866	}
299		867
300	if (flags & EVLOOP_NONBLOCK)	868	if (flags & EVLOOP_NONBLOCK || idlecnt)
301	block = 0.;	869	block = 0.;
302	else if (!timercnt)
303	block = MAX_BLOCKTIME;
304	else	870	else
305	{	871	{
		872	block = MAX_BLOCKTIME;
		873
		874	if (timercnt)
		875	{
306	block = timers [0]->at - ev_now + method_fudge;	876	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
		877	if (block > to) block = to;
		878	}
		879
		880	if (periodiccnt)
		881	{
		882	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
		883	if (block > to) block = to;
		884	}
		885
307	if (block < 0.) block = 0.;	886	if (block < 0.) block = 0.;
308	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
309	}	887	}
310		888
311	fprintf (stderr, "block %f\n", block);//D
312	method_poll (block);	889	method_poll (EV_A_ block);
313		890
		891	/* update rt_now, do magic */
		892	time_update (EV_A);
		893
314	/* put pending timers into pendign queue and reschedule them */	894	/* queue pending timers and reschedule them */
315	timer_reify ();	895	timers_reify (EV_A); /* relative timers called last */
		896	periodics_reify (EV_A); /* absolute timers called first */
316		897
317	ev_now = ev_time ();	898	/* queue idle watchers unless io or timers are pending */
		899	if (!pendingcnt)
		900	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		901
		902	/* queue check watchers, to be executed first */
		903	if (checkcnt)
		904	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		905
318	call_pending ();	906	call_pending (EV_A);
319	}	907	}
320	while (!ev_loop_done);	908	while (activecnt && !loop_done);
321	}
322		909
323	static void	910	if (loop_done != 2)
324	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	911	loop_done = 0;
		912	}
		913
		914	void
		915	ev_unloop (EV_P_ int how)
		916	{
		917	loop_done = how;
		918	}
		919
		920	/*****************************************************************************/
		921
		922	inline void
		923	wlist_add (WL *head, WL elem)
325	{	924	{
326	elem->next = *head;	925	elem->next = *head;
327	*head = elem;	926	*head = elem;
328	}	927	}
329		928
330	static void	929	inline void
331	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	930	wlist_del (WL *head, WL elem)
332	{	931	{
333	while (*head)	932	while (*head)
334	{	933	{
335	if (*head == elem)	934	if (*head == elem)
336	{	935	{
…		…
340		939
341	head = &(*head)->next;	940	head = &(*head)->next;
342	}	941	}
343	}	942	}
344		943
345	static void	944	inline void
346	ev_start (struct ev_watcher *w, int active)	945	ev_clear_pending (EV_P_ W w)
347	{	946	{
		947	if (w->pending)
		948	{
		949	pendings [ABSPRI (w)][w->pending - 1].w = 0;
348	w->pending = 0;	950	w->pending = 0;
		951	}
		952	}
		953
		954	inline void
		955	ev_start (EV_P_ W w, int active)
		956	{
		957	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		958	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		959
349	w->active = active;	960	w->active = active;
		961	ev_ref (EV_A);
350	}	962	}
351		963
352	static void	964	inline void
353	ev_stop (struct ev_watcher *w)	965	ev_stop (EV_P_ W w)
354	{	966	{
355	if (w->pending)	967	ev_unref (EV_A);
356	pendings [w->pending - 1].w = 0;
357
358	w->active = 0;	968	w->active = 0;
359	/* nop */
360	}	969	}
361		970
		971	/*****************************************************************************/
		972
362	void	973	void
363	evio_start (struct ev_io *w)	974	ev_io_start (EV_P_ struct ev_io *w)
364	{	975	{
		976	int fd = w->fd;
		977
365	if (ev_is_active (w))	978	if (ev_is_active (w))
366	return;	979	return;
367		980
368	int fd = w->fd;	981	assert (("ev_io_start called with negative fd", fd >= 0));
369		982
370	ev_start ((struct ev_watcher *)w, 1);	983	ev_start (EV_A_ (W)w, 1);
371	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	984	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
372	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	985	wlist_add ((WL *)&anfds[fd].head, (WL)w);
373		986
374	++fdchangecnt;	987	fd_change (EV_A_ fd);
375	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
376	fdchanges [fdchangecnt - 1] = fd;
377	}	988	}
378		989
379	void	990	void
380	evio_stop (struct ev_io *w)	991	ev_io_stop (EV_P_ struct ev_io *w)
381	{	992	{
		993	ev_clear_pending (EV_A_ (W)w);
382	if (!ev_is_active (w))	994	if (!ev_is_active (w))
383	return;	995	return;
384		996
385	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	997	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
386	ev_stop ((struct ev_watcher *)w);	998	ev_stop (EV_A_ (W)w);
387		999
388	++fdchangecnt;	1000	fd_change (EV_A_ w->fd);
389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
390	fdchanges [fdchangecnt - 1] = w->fd;
391	}	1001	}
392		1002
393	void	1003	void
394	evtimer_start (struct ev_timer *w)	1004	ev_timer_start (EV_P_ struct ev_timer *w)
395	{	1005	{
396	if (ev_is_active (w))	1006	if (ev_is_active (w))
397	return;	1007	return;
398		1008
399	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D
400	if (w->is_abs)
401	{
402	/* this formula differs from the one in timer_reify becuse we do not round up */
403	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
405	}
406	else
407	w->at += ev_now;	1009	w->at += mn_now;
408	fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D
409		1010
410	ev_start ((struct ev_watcher *)w, ++timercnt);	1011	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1012
		1013	ev_start (EV_A_ (W)w, ++timercnt);
411	array_needsize (timers, timermax, timercnt, );	1014	array_needsize (timers, timermax, timercnt, );
412	timers [timercnt - 1] = w;	1015	timers [timercnt - 1] = w;
413	upheap (timercnt - 1);	1016	upheap ((WT *)timers, timercnt - 1);
414	}	1017	}
415		1018
416	void	1019	void
417	evtimer_stop (struct ev_timer *w)	1020	ev_timer_stop (EV_P_ struct ev_timer *w)
418	{	1021	{
419	fprintf (stderr, "-topping %d, %d\n", w->active, timercnt);//D	1022	ev_clear_pending (EV_A_ (W)w);
420	if (!ev_is_active (w))	1023	if (!ev_is_active (w))
421	return;	1024	return;
422		1025
423	fprintf (stderr, "stopping %d, %d\n", w->active, timercnt);//D
424	if (w->active < timercnt)	1026	if (w->active < timercnt--)
425	{	1027	{
426	timers [w->active - 1] = timers [--timercnt];	1028	timers [w->active - 1] = timers [timercnt];
427	downheap (w->active - 1);	1029	downheap ((WT *)timers, timercnt, w->active - 1);
428	}	1030	}
429		1031
430	ev_stop ((struct ev_watcher *)w);	1032	w->at = w->repeat;
431	}
432		1033
		1034	ev_stop (EV_A_ (W)w);
		1035	}
		1036
433	void	1037	void
434	evsignal_start (struct ev_signal *w)	1038	ev_timer_again (EV_P_ struct ev_timer *w)
435	{	1039	{
436	if (ev_is_active (w))	1040	if (ev_is_active (w))
437	return;	1041	{
		1042	if (w->repeat)
		1043	{
		1044	w->at = mn_now + w->repeat;
		1045	downheap ((WT *)timers, timercnt, w->active - 1);
		1046	}
		1047	else
		1048	ev_timer_stop (EV_A_ w);
		1049	}
		1050	else if (w->repeat)
		1051	ev_timer_start (EV_A_ w);
		1052	}
438		1053
439	ev_start ((struct ev_watcher *)w, 1);	1054	void
		1055	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1056	{
		1057	if (ev_is_active (w))
		1058	return;
		1059
		1060	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1061
		1062	/* this formula differs from the one in periodic_reify because we do not always round up */
		1063	if (w->interval)
		1064	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
		1065
		1066	ev_start (EV_A_ (W)w, ++periodiccnt);
		1067	array_needsize (periodics, periodicmax, periodiccnt, );
		1068	periodics [periodiccnt - 1] = w;
		1069	upheap ((WT *)periodics, periodiccnt - 1);
		1070	}
		1071
		1072	void
		1073	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1074	{
		1075	ev_clear_pending (EV_A_ (W)w);
		1076	if (!ev_is_active (w))
		1077	return;
		1078
		1079	if (w->active < periodiccnt--)
		1080	{
		1081	periodics [w->active - 1] = periodics [periodiccnt];
		1082	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		1083	}
		1084
		1085	ev_stop (EV_A_ (W)w);
		1086	}
		1087
		1088	#ifndef SA_RESTART
		1089	# define SA_RESTART 0
		1090	#endif
		1091
		1092	void
		1093	ev_signal_start (EV_P_ struct ev_signal *w)
		1094	{
		1095	if (ev_is_active (w))
		1096	return;
		1097
		1098	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1099
		1100	ev_start (EV_A_ (W)w, 1);
440	array_needsize (signals, signalmax, w->signum, signals_init);	1101	array_needsize (signals, signalmax, w->signum, signals_init);
441	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1102	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
442	}
443		1103
		1104	if (!w->next)
		1105	{
		1106	struct sigaction sa;
		1107	sa.sa_handler = sighandler;
		1108	sigfillset (&sa.sa_mask);
		1109	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1110	sigaction (w->signum, &sa, 0);
		1111	}
		1112	}
		1113
444	void	1114	void
445	evsignal_stop (struct ev_signal *w)	1115	ev_signal_stop (EV_P_ struct ev_signal *w)
446	{	1116	{
		1117	ev_clear_pending (EV_A_ (W)w);
447	if (!ev_is_active (w))	1118	if (!ev_is_active (w))
448	return;	1119	return;
449		1120
450	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1121	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
451	ev_stop ((struct ev_watcher *)w);	1122	ev_stop (EV_A_ (W)w);
		1123
		1124	if (!signals [w->signum - 1].head)
		1125	signal (w->signum, SIG_DFL);
		1126	}
		1127
		1128	void
		1129	ev_idle_start (EV_P_ struct ev_idle *w)
		1130	{
		1131	if (ev_is_active (w))
		1132	return;
		1133
		1134	ev_start (EV_A_ (W)w, ++idlecnt);
		1135	array_needsize (idles, idlemax, idlecnt, );
		1136	idles [idlecnt - 1] = w;
		1137	}
		1138
		1139	void
		1140	ev_idle_stop (EV_P_ struct ev_idle *w)
		1141	{
		1142	ev_clear_pending (EV_A_ (W)w);
		1143	if (ev_is_active (w))
		1144	return;
		1145
		1146	idles [w->active - 1] = idles [--idlecnt];
		1147	ev_stop (EV_A_ (W)w);
		1148	}
		1149
		1150	void
		1151	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1152	{
		1153	if (ev_is_active (w))
		1154	return;
		1155
		1156	ev_start (EV_A_ (W)w, ++preparecnt);
		1157	array_needsize (prepares, preparemax, preparecnt, );
		1158	prepares [preparecnt - 1] = w;
		1159	}
		1160
		1161	void
		1162	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1163	{
		1164	ev_clear_pending (EV_A_ (W)w);
		1165	if (ev_is_active (w))
		1166	return;
		1167
		1168	prepares [w->active - 1] = prepares [--preparecnt];
		1169	ev_stop (EV_A_ (W)w);
		1170	}
		1171
		1172	void
		1173	ev_check_start (EV_P_ struct ev_check *w)
		1174	{
		1175	if (ev_is_active (w))
		1176	return;
		1177
		1178	ev_start (EV_A_ (W)w, ++checkcnt);
		1179	array_needsize (checks, checkmax, checkcnt, );
		1180	checks [checkcnt - 1] = w;
		1181	}
		1182
		1183	void
		1184	ev_check_stop (EV_P_ struct ev_check *w)
		1185	{
		1186	ev_clear_pending (EV_A_ (W)w);
		1187	if (ev_is_active (w))
		1188	return;
		1189
		1190	checks [w->active - 1] = checks [--checkcnt];
		1191	ev_stop (EV_A_ (W)w);
		1192	}
		1193
		1194	void
		1195	ev_child_start (EV_P_ struct ev_child *w)
		1196	{
		1197	if (ev_is_active (w))
		1198	return;
		1199
		1200	ev_start (EV_A_ (W)w, 1);
		1201	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1202	}
		1203
		1204	void
		1205	ev_child_stop (EV_P_ struct ev_child *w)
		1206	{
		1207	ev_clear_pending (EV_A_ (W)w);
		1208	if (ev_is_active (w))
		1209	return;
		1210
		1211	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1212	ev_stop (EV_A_ (W)w);
452	}	1213	}
453		1214
454	/*****************************************************************************/	1215	/*****************************************************************************/
		1216
		1217	struct ev_once
		1218	{
		1219	struct ev_io io;
		1220	struct ev_timer to;
		1221	void (*cb)(int revents, void *arg);
		1222	void *arg;
		1223	};
		1224
		1225	static void
		1226	once_cb (EV_P_ struct ev_once *once, int revents)
		1227	{
		1228	void (*cb)(int revents, void *arg) = once->cb;
		1229	void *arg = once->arg;
		1230
		1231	ev_io_stop (EV_A_ &once->io);
		1232	ev_timer_stop (EV_A_ &once->to);
		1233	free (once);
		1234
		1235	cb (revents, arg);
		1236	}
		1237
		1238	static void
		1239	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1240	{
		1241	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1242	}
		1243
		1244	static void
		1245	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1246	{
		1247	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1248	}
		1249
		1250	void
		1251	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1252	{
		1253	struct ev_once *once = malloc (sizeof (struct ev_once));
		1254
		1255	if (!once)
		1256	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1257	else
		1258	{
		1259	once->cb = cb;
		1260	once->arg = arg;
		1261
		1262	ev_watcher_init (&once->io, once_cb_io);
		1263	if (fd >= 0)
		1264	{
		1265	ev_io_set (&once->io, fd, events);
		1266	ev_io_start (EV_A_ &once->io);
		1267	}
		1268
		1269	ev_watcher_init (&once->to, once_cb_to);
		1270	if (timeout >= 0.)
		1271	{
		1272	ev_timer_set (&once->to, timeout, 0.);
		1273	ev_timer_start (EV_A_ &once->to);
		1274	}
		1275	}
		1276	}
		1277
		1278	/*****************************************************************************/
		1279
455	#if 1	1280	#if 0
		1281
		1282	struct ev_io wio;
456		1283
457	static void	1284	static void
458	sin_cb (struct ev_io *w, int revents)	1285	sin_cb (struct ev_io *w, int revents)
459	{	1286	{
460	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1287	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
461	}	1288	}
462		1289
463	static void	1290	static void
464	ocb (struct ev_timer *w, int revents)	1291	ocb (struct ev_timer *w, int revents)
465	{	1292	{
466	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1293	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
		1294	ev_timer_stop (w);
		1295	ev_timer_start (w);
		1296	}
		1297
		1298	static void
		1299	scb (struct ev_signal *w, int revents)
		1300	{
		1301	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1302	ev_io_stop (&wio);
		1303	ev_io_start (&wio);
		1304	}
		1305
		1306	static void
		1307	gcb (struct ev_signal *w, int revents)
		1308	{
		1309	fprintf (stderr, "generic %x\n", revents);
		1310
467	}	1311	}
468		1312
469	int main (void)	1313	int main (void)
470	{	1314	{
471	struct ev_io sin;
472
473	ev_init (0);	1315	ev_init (0);
474		1316
475	evw_init (&sin, sin_cb, 55);
476	evio_set (&sin, 0, EV_READ);	1317	ev_io_init (&wio, sin_cb, 0, EV_READ);
477	evio_start (&sin);	1318	ev_io_start (&wio);
478		1319
479	struct ev_timer t[1000];	1320	struct ev_timer t[10000];
480		1321
		1322	#if 0
481	int i;	1323	int i;
482	for (i = 0; i < 1000; ++i)	1324	for (i = 0; i < 10000; ++i)
483	{	1325	{
484	struct ev_timer *w = t + i;	1326	struct ev_timer *w = t + i;
485	evw_init (w, ocb, i);	1327	ev_watcher_init (w, ocb, i);
486	evtimer_set_rel (w, drand48 (), 0);	1328	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
487	evtimer_start (w);	1329	ev_timer_start (w);
488	if (drand48 () < 0.5)	1330	if (drand48 () < 0.5)
489	evtimer_stop (w);	1331	ev_timer_stop (w);
490	}	1332	}
		1333	#endif
		1334
		1335	struct ev_timer t1;
		1336	ev_timer_init (&t1, ocb, 5, 10);
		1337	ev_timer_start (&t1);
		1338
		1339	struct ev_signal sig;
		1340	ev_signal_init (&sig, scb, SIGQUIT);
		1341	ev_signal_start (&sig);
		1342
		1343	struct ev_check cw;
		1344	ev_check_init (&cw, gcb);
		1345	ev_check_start (&cw);
		1346
		1347	struct ev_idle iw;
		1348	ev_idle_init (&iw, gcb);
		1349	ev_idle_start (&iw);
491		1350
492	ev_loop (0);	1351	ev_loop (0);
493		1352
494	return 0;	1353	return 0;
495	}	1354	}

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