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Comparing libev/ev.c (file contents):
Revision 1.1 by root, Tue Oct 30 20:59:31 2007 UTC vs.
Revision 1.51 by root, Sat Nov 3 21:58:51 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);
24	};
25
26	struct ev_watcher_list {	115	typedef struct ev_watcher_list *WL;
27	EV_WATCHER_LIST (ev_watcher_list);	116	typedef struct ev_watcher_time *WT;
28	};
29		117
30	ev_tstamp ev_now;	118	static ev_tstamp now_floor, mn_now, diff; /* monotonic clock */
31	int ev_method;	119	static ev_tstamp rt_now;
		120	static int method;
32		121
33	static int have_monotonic; /* runtime */	122	static int have_monotonic; /* runtime */
34		123
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
36	static void (*method_reify)(void);	125	static void (*method_modify)(EV_P_ int fd, int oev, int nev);
37	static void (*method_poll)(ev_tstamp timeout);	126	static void (*method_poll)(EV_P_ ev_tstamp timeout);
38		127
39	ev_tstamp	128	static int activecnt; /* number of active events */
		129
		130	#if EV_USE_SELECT
		131	static unsigned char *vec_ri, *vec_ro, *vec_wi, *vec_wo;
		132	static int vec_max;
		133	#endif
		134
		135	#if EV_USEV_POLL
		136	static struct pollfd *polls;
		137	static int pollmax, pollcnt;
		138	static int *pollidxs; /* maps fds into structure indices */
		139	static int pollidxmax;
		140	#endif
		141
		142	#if EV_USE_EPOLL
		143	static int epoll_fd = -1;
		144
		145	static struct epoll_event *events;
		146	static int eventmax;
		147	#endif
		148
		149	#if EV_USE_KQUEUE
		150	static int kqueue_fd;
		151	static struct kevent *kqueue_changes;
		152	static int kqueue_changemax, kqueue_changecnt;
		153	static struct kevent *kqueue_events;
		154	static int kqueue_eventmax;
		155	#endif
		156
		157	/*****************************************************************************/
		158
		159	inline ev_tstamp
40	ev_time (void)	160	ev_time (void)
41	{	161	{
42	#if HAVE_REALTIME	162	#if EV_USE_REALTIME
43	struct timespec ts;	163	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	164	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	165	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	166	#else
47	struct timeval tv;	167	struct timeval tv;
48	gettimeofday (&tv, 0);	168	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	169	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	170	#endif
51	}	171	}
52		172
53	static ev_tstamp	173	inline ev_tstamp
54	get_clock (void)	174	get_clock (void)
55	{	175	{
56	#if HAVE_MONOTONIC	176	#if EV_USE_MONOTONIC
57	if (have_monotonic)	177	if (expect_true (have_monotonic))
58	{	178	{
59	struct timespec ts;	179	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	180	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	181	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	182	}
63	#endif	183	#endif
64		184
65	return ev_time ();	185	return ev_time ();
66	}	186	}
67		187
		188	ev_tstamp
		189	ev_now (EV_P)
		190	{
		191	return rt_now;
		192	}
		193
		194	#define array_roundsize(base,n) ((n) | 4 & ~3)
		195
68	#define array_needsize(base,cur,cnt,init) \	196	#define array_needsize(base,cur,cnt,init) \
69	if ((cnt) > cur) \	197	if (expect_false ((cnt) > cur)) \
70	{ \	198	{ \
71	int newcnt = cur; \	199	int newcnt = cur; \
72	do \	200	do \
73	{ \	201	{ \
74	newcnt += (newcnt >> 1) + 16; \	202	newcnt = array_roundsize (base, newcnt << 1); \
75	} \	203	} \
76	while ((cnt) > newcnt); \	204	while ((cnt) > newcnt); \
77	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	205	\
78	base = realloc (base, sizeof (*base) * (newcnt)); \	206	base = realloc (base, sizeof (*base) * (newcnt)); \
79	init (base + cur, newcnt - cur); \	207	init (base + cur, newcnt - cur); \
80	cur = newcnt; \	208	cur = newcnt; \
81	}	209	}
82		210
		211	/*****************************************************************************/
		212
83	typedef struct	213	typedef struct
84	{	214	{
85	struct ev_io *head;	215	struct ev_watcher_list *head;
86	unsigned char wev, rev; /* want, received event set */	216	unsigned char events;
		217	unsigned char reify;
87	} ANFD;	218	} ANFD;
88		219
89	static ANFD *anfds;	220	static ANFD *anfds;
90	static int anfdmax;	221	static int anfdmax;
91		222
		223	static void
		224	anfds_init (ANFD *base, int count)
		225	{
		226	while (count--)
		227	{
		228	base->head = 0;
		229	base->events = EV_NONE;
		230	base->reify = 0;
		231
		232	++base;
		233	}
		234	}
		235
		236	typedef struct
		237	{
		238	W w;
		239	int events;
		240	} ANPENDING;
		241
		242	static ANPENDING *pendings [NUMPRI];
		243	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
		244
		245	static void
		246	event (EV_P_ W w, int events)
		247	{
		248	if (w->pending)
		249	{
		250	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		251	return;
		252	}
		253
		254	w->pending = ++pendingcnt [ABSPRI (w)];
		255	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		256	pendings [ABSPRI (w)][w->pending - 1].w = w;
		257	pendings [ABSPRI (w)][w->pending - 1].events = events;
		258	}
		259
		260	static void
		261	queue_events (EV_P_ W *events, int eventcnt, int type)
		262	{
		263	int i;
		264
		265	for (i = 0; i < eventcnt; ++i)
		266	event (EV_A_ events [i], type);
		267	}
		268
		269	static void
		270	fd_event (EV_P_ int fd, int events)
		271	{
		272	ANFD *anfd = anfds + fd;
		273	struct ev_io *w;
		274
		275	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		276	{
		277	int ev = w->events & events;
		278
		279	if (ev)
		280	event (EV_A_ (W)w, ev);
		281	}
		282	}
		283
		284	/*****************************************************************************/
		285
92	static int *fdchanges;	286	static int *fdchanges;
93	static int fdchangemax, fdchangecnt;	287	static int fdchangemax, fdchangecnt;
94		288
95	static void	289	static void
96	anfds_init (ANFD *base, int count)	290	fd_reify (EV_P)
97	{	291	{
98	while (count--)	292	int i;
99	{	293
100	base->head = 0;	294	for (i = 0; i < fdchangecnt; ++i)
101	base->wev = base->rev = EV_NONE;
102	++base;
103	}	295	{
104	}	296	int fd = fdchanges [i];
105
106	typedef struct
107	{
108	struct ev_watcher *w;
109	int events;
110	} ANPENDING;
111
112	static ANPENDING *pendings;
113	static int pendingmax, pendingcnt;
114
115	static void
116	event (struct ev_watcher *w, int events)
117	{
118	w->pending = ++pendingcnt;
119	array_needsize (pendings, pendingmax, pendingcnt, );
120	pendings [pendingcnt - 1].w = w;
121	pendings [pendingcnt - 1].events = events;
122	}
123
124	static void
125	fd_event (int fd, int events)
126	{
127	ANFD *anfd = anfds + fd;	297	ANFD *anfd = anfds + fd;
		298	struct ev_io *w;
		299
		300	int events = 0;
		301
		302	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		303	events |= w->events;
		304
		305	anfd->reify = 0;
		306
		307	if (anfd->events != events)
		308	{
		309	method_modify (EV_A_ fd, anfd->events, events);
		310	anfd->events = events;
		311	}
		312	}
		313
		314	fdchangecnt = 0;
		315	}
		316
		317	static void
		318	fd_change (EV_P_ int fd)
		319	{
		320	if (anfds [fd].reify || fdchangecnt < 0)
		321	return;
		322
		323	anfds [fd].reify = 1;
		324
		325	++fdchangecnt;
		326	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		327	fdchanges [fdchangecnt - 1] = fd;
		328	}
		329
		330	static void
		331	fd_kill (EV_P_ int fd)
		332	{
128	struct ev_io *w;	333	struct ev_io *w;
129		334
130	for (w = anfd->head; w; w = w->next)	335	while ((w = (struct ev_io *)anfds [fd].head))
		336	{
		337	ev_io_stop (EV_A_ w);
		338	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		339	}
		340	}
		341
		342	/* called on EBADF to verify fds */
		343	static void
		344	fd_ebadf (EV_P)
		345	{
		346	int fd;
		347
		348	for (fd = 0; fd < anfdmax; ++fd)
		349	if (anfds [fd].events)
		350	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		351	fd_kill (EV_A_ fd);
		352	}
		353
		354	/* called on ENOMEM in select/poll to kill some fds and retry */
		355	static void
		356	fd_enomem (EV_P)
		357	{
		358	int fd = anfdmax;
		359
		360	while (fd--)
		361	if (anfds [fd].events)
131	{	362	{
132	int ev = w->events & events;	363	close (fd);
133		364	fd_kill (EV_A_ fd);
134	if (ev)	365	return;
135	event ((struct ev_watcher *)w, ev);
136	}	366	}
137	}	367	}
		368
		369	/*****************************************************************************/
138		370
139	static struct ev_timer **timers;	371	static struct ev_timer **timers;
140	static int timermax, timercnt;	372	static int timermax, timercnt;
141		373
		374	static struct ev_periodic **periodics;
		375	static int periodicmax, periodiccnt;
		376
142	static void	377	static void
143	upheap (int k)	378	upheap (WT *timers, int k)
144	{	379	{
145	struct ev_timer *w = timers [k];	380	WT w = timers [k];
146		381
147	while (k && timers [k >> 1]->at > w->at)	382	while (k && timers [k >> 1]->at > w->at)
148	{	383	{
149	timers [k] = timers [k >> 1];	384	timers [k] = timers [k >> 1];
150	timers [k]->active = k + 1;	385	timers [k]->active = k + 1;
…		…
155	timers [k]->active = k + 1;	390	timers [k]->active = k + 1;
156		391
157	}	392	}
158		393
159	static void	394	static void
160	downheap (int k)	395	downheap (WT *timers, int N, int k)
161	{	396	{
162	struct ev_timer *w = timers [k];	397	WT w = timers [k];
163		398
164	while (k <= (timercnt >> 1))	399	while (k < (N >> 1))
165	{	400	{
166	int j = k << 1;	401	int j = k << 1;
167		402
168	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	403	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
169	++j;	404	++j;
170		405
171	if (w->at <= timers [j]->at)	406	if (w->at <= timers [j]->at)
172	break;	407	break;
173		408
174	timers [k] = timers [j];	409	timers [k] = timers [j];
175	timers [k]->active = k;	410	timers [k]->active = k + 1;
176	k = j;	411	k = j;
177	}	412	}
178		413
179	timers [k] = w;	414	timers [k] = w;
180	timers [k]->active = k + 1;	415	timers [k]->active = k + 1;
181	}	416	}
182		417
183	static struct ev_signal **signals;	418	/*****************************************************************************/
		419
		420	typedef struct
		421	{
		422	struct ev_watcher_list *head;
		423	sig_atomic_t volatile gotsig;
		424	} ANSIG;
		425
		426	static ANSIG *signals;
184	static int signalmax, signalcnt;	427	static int signalmax;
185		428
		429	static int sigpipe [2];
		430	static sig_atomic_t volatile gotsig;
		431	static struct ev_io sigev;
		432
186	static void	433	static void
187	signals_init (struct ev_signal **base, int count)	434	signals_init (ANSIG *base, int count)
188	{	435	{
189	while (count--)	436	while (count--)
190	*base++ = 0;	437	{
191	}	438	base->head = 0;
		439	base->gotsig = 0;
192		440
		441	++base;
		442	}
		443	}
		444
		445	static void
		446	sighandler (int signum)
		447	{
		448	signals [signum - 1].gotsig = 1;
		449
		450	if (!gotsig)
		451	{
		452	int old_errno = errno;
		453	gotsig = 1;
		454	write (sigpipe [1], &signum, 1);
		455	errno = old_errno;
		456	}
		457	}
		458
		459	static void
		460	sigcb (EV_P_ struct ev_io *iow, int revents)
		461	{
		462	struct ev_watcher_list *w;
		463	int signum;
		464
		465	read (sigpipe [0], &revents, 1);
		466	gotsig = 0;
		467
		468	for (signum = signalmax; signum--; )
		469	if (signals [signum].gotsig)
		470	{
		471	signals [signum].gotsig = 0;
		472
		473	for (w = signals [signum].head; w; w = w->next)
		474	event (EV_A_ (W)w, EV_SIGNAL);
		475	}
		476	}
		477
		478	static void
		479	siginit (EV_P)
		480	{
		481	#ifndef WIN32
		482	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		483	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		484
		485	/* rather than sort out wether we really need nb, set it */
		486	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		487	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		488	#endif
		489
		490	ev_io_set (&sigev, sigpipe [0], EV_READ);
		491	ev_io_start (&sigev);
		492	}
		493
		494	/*****************************************************************************/
		495
		496	static struct ev_idle **idles;
		497	static int idlemax, idlecnt;
		498
		499	static struct ev_prepare **prepares;
		500	static int preparemax, preparecnt;
		501
		502	static struct ev_check **checks;
		503	static int checkmax, checkcnt;
		504
		505	/*****************************************************************************/
		506
		507	static struct ev_child *childs [PID_HASHSIZE];
		508	static struct ev_signal childev;
		509
		510	#ifndef WIN32
		511
		512	#ifndef WCONTINUED
		513	# define WCONTINUED 0
		514	#endif
		515
		516	static void
		517	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		518	{
		519	struct ev_child *w;
		520
		521	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		522	if (w->pid == pid || !w->pid)
		523	{
		524	w->priority = sw->priority; /* need to do it *now* */
		525	w->rpid = pid;
		526	w->rstatus = status;
		527	event (EV_A_ (W)w, EV_CHILD);
		528	}
		529	}
		530
		531	static void
		532	childcb (EV_P_ struct ev_signal *sw, int revents)
		533	{
		534	int pid, status;
		535
		536	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		537	{
		538	/* make sure we are called again until all childs have been reaped */
		539	event (EV_A_ (W)sw, EV_SIGNAL);
		540
		541	child_reap (EV_A_ sw, pid, pid, status);
		542	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		543	}
		544	}
		545
		546	#endif
		547
		548	/*****************************************************************************/
		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
193	#if HAVE_EPOLL	553	#if EV_USE_EPOLL
194	# include "ev_epoll.c"	554	# include "ev_epoll.c"
195	#endif	555	#endif
		556	#if EV_USEV_POLL
		557	# include "ev_poll.c"
		558	#endif
196	#if HAVE_SELECT	559	#if EV_USE_SELECT
197	# include "ev_select.c"	560	# include "ev_select.c"
198	#endif	561	#endif
199		562
200	int ev_init (int flags)	563	int
		564	ev_version_major (void)
201	{	565	{
		566	return EV_VERSION_MAJOR;
		567	}
		568
		569	int
		570	ev_version_minor (void)
		571	{
		572	return EV_VERSION_MINOR;
		573	}
		574
		575	/* return true if we are running with elevated privileges and should ignore env variables */
		576	static int
		577	enable_secure (void)
		578	{
		579	#ifdef WIN32
		580	return 0;
		581	#else
		582	return getuid () != geteuid ()
		583	|| getgid () != getegid ();
		584	#endif
		585	}
		586
		587	int
		588	ev_method (EV_P)
		589	{
		590	return method;
		591	}
		592
		593	int
		594	ev_init (EV_P_ int methods)
		595	{
		596	if (!method)
		597	{
202	#if HAVE_MONOTONIC	598	#if EV_USE_MONOTONIC
203	{	599	{
204	struct timespec ts;	600	struct timespec ts;
205	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
206	have_monotonic = 1;	602	have_monotonic = 1;
207	}	603	}
208	#endif	604	#endif
209		605
210	ev_now = ev_time ();	606	rt_now = ev_time ();
		607	mn_now = get_clock ();
		608	now_floor = mn_now;
		609	diff = rt_now - mn_now;
211		610
		611	if (pipe (sigpipe))
		612	return 0;
		613
		614	if (methods == EVMETHOD_AUTO)
		615	if (!enable_secure () && getenv ("LIBmethodS"))
		616	methods = atoi (getenv ("LIBmethodS"));
		617	else
		618	methods = EVMETHOD_ANY;
		619
		620	method = 0;
		621	#if EV_USE_KQUEUE
		622	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		623	#endif
212	#if HAVE_EPOLL	624	#if EV_USE_EPOLL
213	if (epoll_init (flags))	625	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
214	return ev_method;
215	#endif	626	#endif
		627	#if EV_USEV_POLL
		628	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		629	#endif
216	#if HAVE_SELECT	630	#if EV_USE_SELECT
217	if (select_init (flags))	631	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
218	return ev_method;
219	#endif	632	#endif
220		633
221	ev_method = EVMETHOD_NONE;	634	if (method)
222	return ev_method;
223	}
224
225	void ev_prefork (void)
226	{
227	}
228
229	void ev_postfork_parent (void)
230	{
231	}
232
233	void ev_postfork_child (void)
234	{
235	#if HAVE_EPOLL
236	epoll_postfork_child ();
237	#endif
238	}
239
240	static void
241	call_pending ()
242	{
243	int i;
244
245	for (i = 0; i < pendingcnt; ++i)
246	{
247	ANPENDING *p = pendings + i;
248
249	if (p->w)
250	{	635	{
251	p->w->pending = 0;	636	ev_watcher_init (&sigev, sigcb);
252	p->w->cb (p->w, p->events);	637	ev_set_priority (&sigev, EV_MAXPRI);
		638	siginit (EV_A);
		639
		640	#ifndef WIN32
		641	ev_signal_init (&childev, childcb, SIGCHLD);
		642	ev_set_priority (&childev, EV_MAXPRI);
		643	ev_signal_start (EV_A_ &childev);
		644	#endif
253	}	645	}
254	}	646	}
255		647
256	pendingcnt = 0;	648	return method;
257	}	649	}
258		650
		651	/*****************************************************************************/
		652
		653	void
		654	ev_fork_prepare (void)
		655	{
		656	/* nop */
		657	}
		658
		659	void
		660	ev_fork_parent (void)
		661	{
		662	/* nop */
		663	}
		664
		665	void
		666	ev_fork_child (void)
		667	{
		668	#if EV_USE_EPOLL
		669	if (method == EVMETHOD_EPOLL)
		670	epoll_postfork_child ();
		671	#endif
		672
		673	ev_io_stop (&sigev);
		674	close (sigpipe [0]);
		675	close (sigpipe [1]);
		676	pipe (sigpipe);
		677	siginit ();
		678	}
		679
		680	/*****************************************************************************/
		681
259	static void	682	static void
		683	call_pending (EV_P)
		684	{
		685	int pri;
		686
		687	for (pri = NUMPRI; pri--; )
		688	while (pendingcnt [pri])
		689	{
		690	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		691
		692	if (p->w)
		693	{
		694	p->w->pending = 0;
		695	p->w->cb (EV_A_ p->w, p->events);
		696	}
		697	}
		698	}
		699
		700	static void
260	timer_reify (void)	701	timers_reify (EV_P)
261	{	702	{
262	while (timercnt && timers [0]->at <= ev_now)	703	while (timercnt && timers [0]->at <= mn_now)
263	{	704	{
264	struct ev_timer *w = timers [0];	705	struct ev_timer *w = timers [0];
265		706
266	/* first reschedule timer */	707	/* first reschedule or stop timer */
267	if (w->repeat)	708	if (w->repeat)
268	{	709	{
269	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	710	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
270	if (w->is_abs)
271	w->at += floor ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
272	else
273	w->at = ev_now + w->repeat;	711	w->at = mn_now + w->repeat;
274		712	downheap ((WT *)timers, timercnt, 0);
275	fprintf (stderr, "b %f\n", w->at);//D
276
277	downheap (0);
278	}	713	}
279	else	714	else
280	evtimer_stop (w); /* nonrepeating: stop timer */	715	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
281		716
282	event ((struct ev_watcher *)w, EV_TIMEOUT);	717	event ((W)w, EV_TIMEOUT);
		718	}
		719	}
		720
		721	static void
		722	periodics_reify (EV_P)
		723	{
		724	while (periodiccnt && periodics [0]->at <= rt_now)
283	}	725	{
284	}	726	struct ev_periodic *w = periodics [0];
285		727
286	int ev_loop_done;	728	/* first reschedule or stop timer */
		729	if (w->interval)
		730	{
		731	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
		732	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		733	downheap ((WT *)periodics, periodiccnt, 0);
		734	}
		735	else
		736	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
287		737
		738	event (EV_A_ (W)w, EV_PERIODIC);
		739	}
		740	}
		741
		742	static void
		743	periodics_reschedule (EV_P_ ev_tstamp diff)
		744	{
		745	int i;
		746
		747	/* adjust periodics after time jump */
		748	for (i = 0; i < periodiccnt; ++i)
		749	{
		750	struct ev_periodic *w = periodics [i];
		751
		752	if (w->interval)
		753	{
		754	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
		755
		756	if (fabs (diff) >= 1e-4)
		757	{
		758	ev_periodic_stop (EV_A_ w);
		759	ev_periodic_start (EV_A_ w);
		760
		761	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		762	}
		763	}
		764	}
		765	}
		766
		767	inline int
		768	time_update_monotonic (EV_P)
		769	{
		770	mn_now = get_clock ();
		771
		772	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		773	{
		774	rt_now = mn_now + diff;
		775	return 0;
		776	}
		777	else
		778	{
		779	now_floor = mn_now;
		780	rt_now = ev_time ();
		781	return 1;
		782	}
		783	}
		784
		785	static void
		786	time_update (EV_P)
		787	{
		788	int i;
		789
		790	#if EV_USE_MONOTONIC
		791	if (expect_true (have_monotonic))
		792	{
		793	if (time_update_monotonic (EV_A))
		794	{
		795	ev_tstamp odiff = diff;
		796
		797	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		798	{
		799	diff = rt_now - mn_now;
		800
		801	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		802	return; /* all is well */
		803
		804	rt_now = ev_time ();
		805	mn_now = get_clock ();
		806	now_floor = mn_now;
		807	}
		808
		809	periodics_reschedule (EV_A_ diff - odiff);
		810	/* no timer adjustment, as the monotonic clock doesn't jump */
		811	}
		812	}
		813	else
		814	#endif
		815	{
		816	rt_now = ev_time ();
		817
		818	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		819	{
		820	periodics_reschedule (EV_A_ rt_now - mn_now);
		821
		822	/* adjust timers. this is easy, as the offset is the same for all */
		823	for (i = 0; i < timercnt; ++i)
		824	timers [i]->at += diff;
		825	}
		826
		827	mn_now = rt_now;
		828	}
		829	}
		830
		831	void
		832	ev_ref (EV_P)
		833	{
		834	++activecnt;
		835	}
		836
		837	void
		838	ev_unref (EV_P)
		839	{
		840	--activecnt;
		841	}
		842
		843	static int loop_done;
		844
		845	void
288	int ev_loop (int flags)	846	ev_loop (EV_P_ int flags)
289	{	847	{
290	double block;	848	double block;
291	ev_loop_done = flags & EVLOOP_ONESHOT;	849	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
292		850
293	do	851	do
294	{	852	{
		853	/* queue check watchers (and execute them) */
		854	if (expect_false (preparecnt))
		855	{
		856	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		857	call_pending (EV_A);
		858	}
		859
295	/* update fd-related kernel structures */	860	/* update fd-related kernel structures */
296	method_reify (); fdchangecnt = 0;	861	fd_reify (EV_A);
297		862
298	/* calculate blocking time */	863	/* calculate blocking time */
		864
		865	/* we only need this for !monotonic clockor timers, but as we basically
		866	always have timers, we just calculate it always */
		867	#if EV_USE_MONOTONIC
		868	if (expect_true (have_monotonic))
		869	time_update_monotonic (EV_A);
		870	else
		871	#endif
		872	{
299	ev_now = ev_time ();	873	rt_now = ev_time ();
		874	mn_now = rt_now;
		875	}
300		876
301	if (flags & EVLOOP_NONBLOCK)	877	if (flags & EVLOOP_NONBLOCK || idlecnt)
302	block = 0.;	878	block = 0.;
303	else if (!timercnt)
304	block = MAX_BLOCKTIME;
305	else	879	else
306	{	880	{
		881	block = MAX_BLOCKTIME;
		882
		883	if (timercnt)
		884	{
307	block = timers [0]->at - ev_now + method_fudge;	885	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
		886	if (block > to) block = to;
		887	}
		888
		889	if (periodiccnt)
		890	{
		891	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
		892	if (block > to) block = to;
		893	}
		894
308	if (block < 0.) block = 0.;	895	if (block < 0.) block = 0.;
309	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
310	}	896	}
311		897
312	fprintf (stderr, "block %f\n", block);//D
313	method_poll (block);	898	method_poll (EV_A_ block);
314		899
		900	/* update rt_now, do magic */
		901	time_update (EV_A);
		902
315	/* put pending timers into pendign queue and reschedule them */	903	/* queue pending timers and reschedule them */
316	timer_reify ();	904	timers_reify (EV_A); /* relative timers called last */
		905	periodics_reify (EV_A); /* absolute timers called first */
317		906
318	ev_now = ev_time ();	907	/* queue idle watchers unless io or timers are pending */
		908	if (!pendingcnt)
		909	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		910
		911	/* queue check watchers, to be executed first */
		912	if (checkcnt)
		913	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		914
319	call_pending ();	915	call_pending (EV_A);
		916	printf ("activecnt %d\n", activecnt);//D
320	}	917	}
321	while (!ev_loop_done);	918	while (activecnt && !loop_done);
322	}
323		919
324	static void	920	if (loop_done != 2)
325	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	921	loop_done = 0;
		922	}
		923
		924	void
		925	ev_unloop (EV_P_ int how)
		926	{
		927	loop_done = how;
		928	}
		929
		930	/*****************************************************************************/
		931
		932	inline void
		933	wlist_add (WL *head, WL elem)
326	{	934	{
327	elem->next = *head;	935	elem->next = *head;
328	*head = elem;	936	*head = elem;
329	}	937	}
330		938
331	static void	939	inline void
332	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	940	wlist_del (WL *head, WL elem)
333	{	941	{
334	while (*head)	942	while (*head)
335	{	943	{
336	if (*head == elem)	944	if (*head == elem)
337	{	945	{
…		…
341		949
342	head = &(*head)->next;	950	head = &(*head)->next;
343	}	951	}
344	}	952	}
345		953
346	static void	954	inline void
347	ev_start (struct ev_watcher *w, int active)	955	ev_clear_pending (EV_P_ W w)
348	{	956	{
		957	if (w->pending)
		958	{
		959	pendings [ABSPRI (w)][w->pending - 1].w = 0;
349	w->pending = 0;	960	w->pending = 0;
		961	}
		962	}
		963
		964	inline void
		965	ev_start (EV_P_ W w, int active)
		966	{
		967	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		968	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		969
350	w->active = active;	970	w->active = active;
		971	ev_ref (EV_A);
351	}	972	}
352		973
353	static void	974	inline void
354	ev_stop (struct ev_watcher *w)	975	ev_stop (EV_P_ W w)
355	{	976	{
356	if (w->pending)	977	ev_unref (EV_A);
357	pendings [w->pending - 1].w = 0;
358
359	w->active = 0;	978	w->active = 0;
360	/* nop */
361	}	979	}
362		980
		981	/*****************************************************************************/
		982
363	void	983	void
364	evio_start (struct ev_io *w)	984	ev_io_start (EV_P_ struct ev_io *w)
365	{	985	{
		986	int fd = w->fd;
		987
366	if (ev_is_active (w))	988	if (ev_is_active (w))
367	return;	989	return;
368		990
369	int fd = w->fd;	991	assert (("ev_io_start called with negative fd", fd >= 0));
370		992
371	ev_start ((struct ev_watcher *)w, 1);	993	ev_start (EV_A_ (W)w, 1);
372	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	994	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
373	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	995	wlist_add ((WL *)&anfds[fd].head, (WL)w);
374		996
375	++fdchangecnt;	997	fd_change (EV_A_ fd);
376	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
377	fdchanges [fdchangecnt - 1] = fd;
378	}	998	}
379		999
380	void	1000	void
381	evio_stop (struct ev_io *w)	1001	ev_io_stop (EV_P_ struct ev_io *w)
382	{	1002	{
		1003	ev_clear_pending (EV_A_ (W)w);
383	if (!ev_is_active (w))	1004	if (!ev_is_active (w))
384	return;	1005	return;
385		1006
386	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	1007	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
387	ev_stop ((struct ev_watcher *)w);	1008	ev_stop (EV_A_ (W)w);
388		1009
389	++fdchangecnt;	1010	fd_change (EV_A_ w->fd);
390	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
391	fdchanges [fdchangecnt - 1] = w->fd;
392	}	1011	}
393		1012
394	void	1013	void
395	evtimer_start (struct ev_timer *w)	1014	ev_timer_start (EV_P_ struct ev_timer *w)
396	{	1015	{
397	if (ev_is_active (w))	1016	if (ev_is_active (w))
398	return;	1017	return;
399		1018
400	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D
401	if (w->is_abs)
402	{
403	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
405	}
406	else
407	w->at += ev_now;	1019	w->at += mn_now;
408	fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D
409		1020
410	ev_start ((struct ev_watcher *)w, ++timercnt);	1021	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1022
		1023	ev_start (EV_A_ (W)w, ++timercnt);
411	array_needsize (timers, timermax, timercnt, );	1024	array_needsize (timers, timermax, timercnt, );
412	timers [timercnt - 1] = w;	1025	timers [timercnt - 1] = w;
413	upheap (timercnt - 1);	1026	upheap ((WT *)timers, timercnt - 1);
414	}	1027	}
415		1028
416	void	1029	void
417	evtimer_stop (struct ev_timer *w)	1030	ev_timer_stop (EV_P_ struct ev_timer *w)
418	{	1031	{
		1032	ev_clear_pending (EV_A_ (W)w);
419	if (!ev_is_active (w))	1033	if (!ev_is_active (w))
420	return;	1034	return;
421		1035
		1036	if (w->active < timercnt--)
		1037	{
422	timers [w->active - 1] = timers [--timercnt];	1038	timers [w->active - 1] = timers [timercnt];
423	downheap (w->active - 1);	1039	downheap ((WT *)timers, timercnt, w->active - 1);
424	ev_stop ((struct ev_watcher *)w);	1040	}
425	}
426		1041
		1042	w->at = w->repeat;
		1043
		1044	ev_stop (EV_A_ (W)w);
		1045	}
		1046
427	void	1047	void
428	evsignal_start (struct ev_signal *w)	1048	ev_timer_again (EV_P_ struct ev_timer *w)
429	{	1049	{
430	if (ev_is_active (w))	1050	if (ev_is_active (w))
431	return;	1051	{
		1052	if (w->repeat)
		1053	{
		1054	w->at = mn_now + w->repeat;
		1055	downheap ((WT *)timers, timercnt, w->active - 1);
		1056	}
		1057	else
		1058	ev_timer_stop (EV_A_ w);
		1059	}
		1060	else if (w->repeat)
		1061	ev_timer_start (EV_A_ w);
		1062	}
432		1063
433	ev_start ((struct ev_watcher *)w, 1);	1064	void
		1065	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1066	{
		1067	if (ev_is_active (w))
		1068	return;
		1069
		1070	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1071
		1072	/* this formula differs from the one in periodic_reify because we do not always round up */
		1073	if (w->interval)
		1074	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
		1075
		1076	ev_start (EV_A_ (W)w, ++periodiccnt);
		1077	array_needsize (periodics, periodicmax, periodiccnt, );
		1078	periodics [periodiccnt - 1] = w;
		1079	upheap ((WT *)periodics, periodiccnt - 1);
		1080	}
		1081
		1082	void
		1083	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1084	{
		1085	ev_clear_pending (EV_A_ (W)w);
		1086	if (!ev_is_active (w))
		1087	return;
		1088
		1089	if (w->active < periodiccnt--)
		1090	{
		1091	periodics [w->active - 1] = periodics [periodiccnt];
		1092	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		1093	}
		1094
		1095	ev_stop (EV_A_ (W)w);
		1096	}
		1097
		1098	#ifndef SA_RESTART
		1099	# define SA_RESTART 0
		1100	#endif
		1101
		1102	void
		1103	ev_signal_start (EV_P_ struct ev_signal *w)
		1104	{
		1105	if (ev_is_active (w))
		1106	return;
		1107
		1108	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1109
		1110	ev_start (EV_A_ (W)w, 1);
434	array_needsize (signals, signalmax, w->signum, signals_init);	1111	array_needsize (signals, signalmax, w->signum, signals_init);
435	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1112	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
436	}
437		1113
		1114	if (!w->next)
		1115	{
		1116	struct sigaction sa;
		1117	sa.sa_handler = sighandler;
		1118	sigfillset (&sa.sa_mask);
		1119	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1120	sigaction (w->signum, &sa, 0);
		1121	}
		1122	}
		1123
438	void	1124	void
439	evsignal_stop (struct ev_signal *w)	1125	ev_signal_stop (EV_P_ struct ev_signal *w)
440	{	1126	{
		1127	ev_clear_pending (EV_A_ (W)w);
441	if (!ev_is_active (w))	1128	if (!ev_is_active (w))
442	return;	1129	return;
443		1130
444	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1131	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
445	ev_stop ((struct ev_watcher *)w);	1132	ev_stop (EV_A_ (W)w);
		1133
		1134	if (!signals [w->signum - 1].head)
		1135	signal (w->signum, SIG_DFL);
		1136	}
		1137
		1138	void
		1139	ev_idle_start (EV_P_ struct ev_idle *w)
		1140	{
		1141	if (ev_is_active (w))
		1142	return;
		1143
		1144	ev_start (EV_A_ (W)w, ++idlecnt);
		1145	array_needsize (idles, idlemax, idlecnt, );
		1146	idles [idlecnt - 1] = w;
		1147	}
		1148
		1149	void
		1150	ev_idle_stop (EV_P_ struct ev_idle *w)
		1151	{
		1152	ev_clear_pending (EV_A_ (W)w);
		1153	if (ev_is_active (w))
		1154	return;
		1155
		1156	idles [w->active - 1] = idles [--idlecnt];
		1157	ev_stop (EV_A_ (W)w);
		1158	}
		1159
		1160	void
		1161	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1162	{
		1163	if (ev_is_active (w))
		1164	return;
		1165
		1166	ev_start (EV_A_ (W)w, ++preparecnt);
		1167	array_needsize (prepares, preparemax, preparecnt, );
		1168	prepares [preparecnt - 1] = w;
		1169	}
		1170
		1171	void
		1172	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1173	{
		1174	ev_clear_pending (EV_A_ (W)w);
		1175	if (ev_is_active (w))
		1176	return;
		1177
		1178	prepares [w->active - 1] = prepares [--preparecnt];
		1179	ev_stop (EV_A_ (W)w);
		1180	}
		1181
		1182	void
		1183	ev_check_start (EV_P_ struct ev_check *w)
		1184	{
		1185	if (ev_is_active (w))
		1186	return;
		1187
		1188	ev_start (EV_A_ (W)w, ++checkcnt);
		1189	array_needsize (checks, checkmax, checkcnt, );
		1190	checks [checkcnt - 1] = w;
		1191	}
		1192
		1193	void
		1194	ev_check_stop (EV_P_ struct ev_check *w)
		1195	{
		1196	ev_clear_pending (EV_A_ (W)w);
		1197	if (ev_is_active (w))
		1198	return;
		1199
		1200	checks [w->active - 1] = checks [--checkcnt];
		1201	ev_stop (EV_A_ (W)w);
		1202	}
		1203
		1204	void
		1205	ev_child_start (EV_P_ struct ev_child *w)
		1206	{
		1207	if (ev_is_active (w))
		1208	return;
		1209
		1210	ev_start (EV_A_ (W)w, 1);
		1211	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1212	}
		1213
		1214	void
		1215	ev_child_stop (EV_P_ struct ev_child *w)
		1216	{
		1217	ev_clear_pending (EV_A_ (W)w);
		1218	if (ev_is_active (w))
		1219	return;
		1220
		1221	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1222	ev_stop (EV_A_ (W)w);
446	}	1223	}
447		1224
448	/*****************************************************************************/	1225	/*****************************************************************************/
		1226
		1227	struct ev_once
		1228	{
		1229	struct ev_io io;
		1230	struct ev_timer to;
		1231	void (*cb)(int revents, void *arg);
		1232	void *arg;
		1233	};
		1234
		1235	static void
		1236	once_cb (EV_P_ struct ev_once *once, int revents)
		1237	{
		1238	void (*cb)(int revents, void *arg) = once->cb;
		1239	void *arg = once->arg;
		1240
		1241	ev_io_stop (EV_A_ &once->io);
		1242	ev_timer_stop (EV_A_ &once->to);
		1243	free (once);
		1244
		1245	cb (revents, arg);
		1246	}
		1247
		1248	static void
		1249	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1250	{
		1251	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1252	}
		1253
		1254	static void
		1255	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1256	{
		1257	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1258	}
		1259
		1260	void
		1261	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1262	{
		1263	struct ev_once *once = malloc (sizeof (struct ev_once));
		1264
		1265	if (!once)
		1266	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1267	else
		1268	{
		1269	once->cb = cb;
		1270	once->arg = arg;
		1271
		1272	ev_watcher_init (&once->io, once_cb_io);
		1273	if (fd >= 0)
		1274	{
		1275	ev_io_set (&once->io, fd, events);
		1276	ev_io_start (EV_A_ &once->io);
		1277	}
		1278
		1279	ev_watcher_init (&once->to, once_cb_to);
		1280	if (timeout >= 0.)
		1281	{
		1282	ev_timer_set (&once->to, timeout, 0.);
		1283	ev_timer_start (EV_A_ &once->to);
		1284	}
		1285	}
		1286	}
		1287
		1288	/*****************************************************************************/
		1289
449	#if 1	1290	#if 0
		1291
		1292	struct ev_io wio;
450		1293
451	static void	1294	static void
452	sin_cb (struct ev_io *w, int revents)	1295	sin_cb (struct ev_io *w, int revents)
453	{	1296	{
454	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1297	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
455	}	1298	}
456		1299
457	static void	1300	static void
458	ocb (struct ev_timer *w, int revents)	1301	ocb (struct ev_timer *w, int revents)
459	{	1302	{
460	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1303	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
		1304	ev_timer_stop (w);
		1305	ev_timer_start (w);
		1306	}
		1307
		1308	static void
		1309	scb (struct ev_signal *w, int revents)
		1310	{
		1311	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1312	ev_io_stop (&wio);
		1313	ev_io_start (&wio);
		1314	}
		1315
		1316	static void
		1317	gcb (struct ev_signal *w, int revents)
		1318	{
		1319	fprintf (stderr, "generic %x\n", revents);
		1320
461	}	1321	}
462		1322
463	int main (void)	1323	int main (void)
464	{	1324	{
465	struct ev_io sin;
466
467	ev_init (0);	1325	ev_init (0);
468		1326
469	evw_init (&sin, sin_cb, 55);
470	evio_set (&sin, 0, EV_READ);	1327	ev_io_init (&wio, sin_cb, 0, EV_READ);
471	evio_start (&sin);	1328	ev_io_start (&wio);
		1329
		1330	struct ev_timer t[10000];
		1331
		1332	#if 0
		1333	int i;
		1334	for (i = 0; i < 10000; ++i)
		1335	{
		1336	struct ev_timer *w = t + i;
		1337	ev_watcher_init (w, ocb, i);
		1338	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
		1339	ev_timer_start (w);
		1340	if (drand48 () < 0.5)
		1341	ev_timer_stop (w);
		1342	}
		1343	#endif
472		1344
473	struct ev_timer t1;	1345	struct ev_timer t1;
474	evw_init (&t1, ocb, 1);	1346	ev_timer_init (&t1, ocb, 5, 10);
475	evtimer_set_rel (&t1, 1, 0);
476	evtimer_start (&t1);	1347	ev_timer_start (&t1);
477		1348
478	struct ev_timer t2;	1349	struct ev_signal sig;
479	evw_init (&t2, ocb, 2);	1350	ev_signal_init (&sig, scb, SIGQUIT);
480	evtimer_set_abs (&t2, ev_time () + 2, 0);	1351	ev_signal_start (&sig);
		1352
		1353	struct ev_check cw;
		1354	ev_check_init (&cw, gcb);
		1355	ev_check_start (&cw);
		1356
		1357	struct ev_idle iw;
		1358	ev_idle_init (&iw, gcb);
481	evtimer_start (&t2);	1359	ev_idle_start (&iw);
482		1360
483	ev_loop (0);	1361	ev_loop (0);
484		1362
485	return 0;	1363	return 0;
486	}	1364	}

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