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Comparing libev/ev.c (file contents):
Revision 1.5 by root, Tue Oct 30 23:54:38 2007 UTC vs.
Revision 1.52 by root, Sat Nov 3 22:10:39 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
6	#include <assert.h>	44	#include <assert.h>
7	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
8	#include <sys/time.h>	50	#include <sys/time.h>
9	#include <time.h>	51	#include <time.h>
10		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
11	#ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
12	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
13	#endif	84	#endif
14		85
15	#define HAVE_EPOLL 1	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
16	#define HAVE_REALTIME 1	88	# define EV_USE_REALTIME 0
17	#define HAVE_SELECT 1	89	#endif
		90
		91	/**/
18		92
19	#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) */
20	#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 */
21		97
22	#include "ev.h"	98	#include "ev.h"
23		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
24	struct ev_watcher {	114	typedef struct ev_watcher *W;
25	EV_WATCHER (ev_watcher);
26	};
27
28	struct ev_watcher_list {	115	typedef struct ev_watcher_list *WL;
29	EV_WATCHER_LIST (ev_watcher_list);	116	typedef struct ev_watcher_time *WT;
30	};
31		117
32	static ev_tstamp now, diff; /* monotonic clock */	118	static ev_tstamp now_floor, mn_now, diff; /* monotonic clock */
33	ev_tstamp ev_now;	119	static ev_tstamp rt_now;
34	int ev_method;	120	static int method;
35		121
36	static int have_monotonic; /* runtime */	122	static int have_monotonic; /* runtime */
37		123
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
39	static void (*method_modify)(int fd, int oev, int nev);	125	static void (*method_modify)(EV_P_ int fd, int oev, int nev);
40	static void (*method_poll)(ev_tstamp timeout);	126	static void (*method_poll)(EV_P_ ev_tstamp timeout);
41		127
42	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
43	ev_time (void)	160	ev_time (void)
44	{	161	{
45	#if HAVE_REALTIME	162	#if EV_USE_REALTIME
46	struct timespec ts;	163	struct timespec ts;
47	clock_gettime (CLOCK_REALTIME, &ts);	164	clock_gettime (CLOCK_REALTIME, &ts);
48	return ts.tv_sec + ts.tv_nsec * 1e-9;	165	return ts.tv_sec + ts.tv_nsec * 1e-9;
49	#else	166	#else
50	struct timeval tv;	167	struct timeval tv;
51	gettimeofday (&tv, 0);	168	gettimeofday (&tv, 0);
52	return tv.tv_sec + tv.tv_usec * 1e-6;	169	return tv.tv_sec + tv.tv_usec * 1e-6;
53	#endif	170	#endif
54	}	171	}
55		172
56	static ev_tstamp	173	inline ev_tstamp
57	get_clock (void)	174	get_clock (void)
58	{	175	{
59	#if HAVE_MONOTONIC	176	#if EV_USE_MONOTONIC
60	if (have_monotonic)	177	if (expect_true (have_monotonic))
61	{	178	{
62	struct timespec ts;	179	struct timespec ts;
63	clock_gettime (CLOCK_MONOTONIC, &ts);	180	clock_gettime (CLOCK_MONOTONIC, &ts);
64	return ts.tv_sec + ts.tv_nsec * 1e-9;	181	return ts.tv_sec + ts.tv_nsec * 1e-9;
65	}	182	}
66	#endif	183	#endif
67		184
68	return ev_time ();	185	return ev_time ();
69	}	186	}
70		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
71	#define array_needsize(base,cur,cnt,init) \	196	#define array_needsize(base,cur,cnt,init) \
72	if ((cnt) > cur) \	197	if (expect_false ((cnt) > cur)) \
73	{ \	198	{ \
74	int newcnt = cur ? cur << 1 : 16; \	199	int newcnt = cur; \
75	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	200	do \
		201	{ \
		202	newcnt = array_roundsize (base, newcnt << 1); \
		203	} \
		204	while ((cnt) > newcnt); \
		205	\
76	base = realloc (base, sizeof (*base) * (newcnt)); \	206	base = realloc (base, sizeof (*base) * (newcnt)); \
77	init (base + cur, newcnt - cur); \	207	init (base + cur, newcnt - cur); \
78	cur = newcnt; \	208	cur = newcnt; \
79	}	209	}
80		210
		211	/*****************************************************************************/
		212
81	typedef struct	213	typedef struct
82	{	214	{
83	struct ev_io *head;	215	struct ev_watcher_list *head;
84	unsigned char wev, rev; /* want, received event set */	216	unsigned char events;
		217	unsigned char reify;
85	} ANFD;	218	} ANFD;
86		219
87	static ANFD *anfds;	220	static ANFD *anfds;
88	static int anfdmax;	221	static int anfdmax;
89		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
90	static int *fdchanges;	286	static int *fdchanges;
91	static int fdchangemax, fdchangecnt;	287	static int fdchangemax, fdchangecnt;
92		288
93	static void	289	static void
94	anfds_init (ANFD *base, int count)	290	fd_reify (EV_P)
95	{	291	{
96	while (count--)	292	int i;
97	{	293
98	base->head = 0;	294	for (i = 0; i < fdchangecnt; ++i)
99	base->wev = base->rev = EV_NONE;
100	++base;
101	}	295	{
102	}	296	int fd = fdchanges [i];
103
104	typedef struct
105	{
106	struct ev_watcher *w;
107	int events;
108	} ANPENDING;
109
110	static ANPENDING *pendings;
111	static int pendingmax, pendingcnt;
112
113	static void
114	event (struct ev_watcher *w, int events)
115	{
116	w->pending = ++pendingcnt;
117	array_needsize (pendings, pendingmax, pendingcnt, );
118	pendings [pendingcnt - 1].w = w;
119	pendings [pendingcnt - 1].events = events;
120	}
121
122	static void
123	fd_event (int fd, int events)
124	{
125	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	{
126	struct ev_io *w;	333	struct ev_io *w;
127		334
128	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)
129	{	362	{
130	int ev = w->events & events;	363	close (fd);
131		364	fd_kill (EV_A_ fd);
132	if (ev)	365	return;
133	event ((struct ev_watcher *)w, ev);
134	}	366	}
135	}	367	}
136		368
		369	/*****************************************************************************/
		370
137	static struct ev_timer **atimers;	371	static struct ev_timer **timers;
138	static int atimermax, atimercnt;	372	static int timermax, timercnt;
139		373
140	static struct ev_timer **rtimers;	374	static struct ev_periodic **periodics;
141	static int rtimermax, rtimercnt;	375	static int periodicmax, periodiccnt;
142		376
143	static void	377	static void
144	upheap (struct ev_timer **timers, int k)	378	upheap (WT *timers, int k)
145	{	379	{
146	struct ev_timer *w = timers [k];	380	WT w = timers [k];
147		381
148	while (k && timers [k >> 1]->at > w->at)	382	while (k && timers [k >> 1]->at > w->at)
149	{	383	{
150	timers [k] = timers [k >> 1];	384	timers [k] = timers [k >> 1];
151	timers [k]->active = k + 1;	385	timers [k]->active = k + 1;
…		…
156	timers [k]->active = k + 1;	390	timers [k]->active = k + 1;
157		391
158	}	392	}
159		393
160	static void	394	static void
161	downheap (struct ev_timer **timers, int N, int k)	395	downheap (WT *timers, int N, int k)
162	{	396	{
163	struct ev_timer *w = timers [k];	397	WT w = timers [k];
164		398
165	while (k < (N >> 1))	399	while (k < (N >> 1))
166	{	400	{
167	int j = k << 1;	401	int j = k << 1;
168		402
…		…
179		413
180	timers [k] = w;	414	timers [k] = w;
181	timers [k]->active = k + 1;	415	timers [k]->active = k + 1;
182	}	416	}
183		417
184	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;
185	static int signalmax;	427	static int signalmax;
186		428
		429	static int sigpipe [2];
		430	static sig_atomic_t volatile gotsig;
		431	static struct ev_io sigev;
		432
187	static void	433	static void
188	signals_init (struct ev_signal **base, int count)	434	signals_init (ANSIG *base, int count)
189	{	435	{
190	while (count--)	436	while (count--)
191	*base++ = 0;	437	{
192	}	438	base->head = 0;
		439	base->gotsig = 0;
193		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	ev_unref (EV_A); /* child watcher should not keep loop alive */
		493	}
		494
		495	/*****************************************************************************/
		496
		497	static struct ev_idle **idles;
		498	static int idlemax, idlecnt;
		499
		500	static struct ev_prepare **prepares;
		501	static int preparemax, preparecnt;
		502
		503	static struct ev_check **checks;
		504	static int checkmax, checkcnt;
		505
		506	/*****************************************************************************/
		507
		508	static struct ev_child *childs [PID_HASHSIZE];
		509	static struct ev_signal childev;
		510
		511	#ifndef WIN32
		512
		513	#ifndef WCONTINUED
		514	# define WCONTINUED 0
		515	#endif
		516
		517	static void
		518	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		519	{
		520	struct ev_child *w;
		521
		522	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		523	if (w->pid == pid || !w->pid)
		524	{
		525	w->priority = sw->priority; /* need to do it *now* */
		526	w->rpid = pid;
		527	w->rstatus = status;
		528	event (EV_A_ (W)w, EV_CHILD);
		529	}
		530	}
		531
		532	static void
		533	childcb (EV_P_ struct ev_signal *sw, int revents)
		534	{
		535	int pid, status;
		536
		537	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		538	{
		539	/* make sure we are called again until all childs have been reaped */
		540	event (EV_A_ (W)sw, EV_SIGNAL);
		541
		542	child_reap (EV_A_ sw, pid, pid, status);
		543	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		544	}
		545	}
		546
		547	#endif
		548
		549	/*****************************************************************************/
		550
		551	#if EV_USE_KQUEUE
		552	# include "ev_kqueue.c"
		553	#endif
194	#if HAVE_EPOLL	554	#if EV_USE_EPOLL
195	# include "ev_epoll.c"	555	# include "ev_epoll.c"
196	#endif	556	#endif
		557	#if EV_USEV_POLL
		558	# include "ev_poll.c"
		559	#endif
197	#if HAVE_SELECT	560	#if EV_USE_SELECT
198	# include "ev_select.c"	561	# include "ev_select.c"
199	#endif	562	#endif
200		563
201	int ev_init (int flags)	564	int
		565	ev_version_major (void)
202	{	566	{
		567	return EV_VERSION_MAJOR;
		568	}
		569
		570	int
		571	ev_version_minor (void)
		572	{
		573	return EV_VERSION_MINOR;
		574	}
		575
		576	/* return true if we are running with elevated privileges and should ignore env variables */
		577	static int
		578	enable_secure (void)
		579	{
		580	#ifdef WIN32
		581	return 0;
		582	#else
		583	return getuid () != geteuid ()
		584	|| getgid () != getegid ();
		585	#endif
		586	}
		587
		588	int
		589	ev_method (EV_P)
		590	{
		591	return method;
		592	}
		593
		594	int
		595	ev_init (EV_P_ int methods)
		596	{
		597	if (!method)
		598	{
203	#if HAVE_MONOTONIC	599	#if EV_USE_MONOTONIC
204	{	600	{
205	struct timespec ts;	601	struct timespec ts;
206	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	602	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
207	have_monotonic = 1;	603	have_monotonic = 1;
208	}	604	}
209	#endif	605	#endif
210		606
211	ev_now = ev_time ();	607	rt_now = ev_time ();
212	now = get_clock ();	608	mn_now = get_clock ();
		609	now_floor = mn_now;
213	diff = ev_now - now;	610	diff = rt_now - mn_now;
214		611
		612	if (pipe (sigpipe))
		613	return 0;
		614
		615	if (methods == EVMETHOD_AUTO)
		616	if (!enable_secure () && getenv ("LIBmethodS"))
		617	methods = atoi (getenv ("LIBmethodS"));
		618	else
		619	methods = EVMETHOD_ANY;
		620
		621	method = 0;
		622	#if EV_USE_KQUEUE
		623	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		624	#endif
215	#if HAVE_EPOLL	625	#if EV_USE_EPOLL
216	if (epoll_init (flags))	626	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
217	return ev_method;
218	#endif	627	#endif
		628	#if EV_USEV_POLL
		629	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		630	#endif
219	#if HAVE_SELECT	631	#if EV_USE_SELECT
220	if (select_init (flags))	632	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
221	return ev_method;
222	#endif	633	#endif
223		634
224	ev_method = EVMETHOD_NONE;	635	if (method)
		636	{
		637	ev_watcher_init (&sigev, sigcb);
		638	ev_set_priority (&sigev, EV_MAXPRI);
		639	siginit (EV_A);
		640
		641	#ifndef WIN32
		642	ev_signal_init (&childev, childcb, SIGCHLD);
		643	ev_set_priority (&childev, EV_MAXPRI);
		644	ev_signal_start (EV_A_ &childev);
		645	ev_unref (EV_A); /* child watcher should not keep loop alive */
		646	#endif
		647	}
		648	}
		649
225	return ev_method;	650	return method;
226	}	651	}
227		652
228	void ev_prefork (void)	653	/*****************************************************************************/
229	{
230	}
231		654
		655	void
		656	ev_fork_prepare (void)
		657	{
		658	/* nop */
		659	}
		660
		661	void
232	void ev_postfork_parent (void)	662	ev_fork_parent (void)
233	{	663	{
		664	/* nop */
234	}	665	}
235		666
		667	void
236	void ev_postfork_child (void)	668	ev_fork_child (void)
237	{	669	{
238	#if HAVE_EPOLL	670	#if EV_USE_EPOLL
239	if (ev_method == EVMETHOD_EPOLL)	671	if (method == EVMETHOD_EPOLL)
240	epoll_postfork_child ();	672	epoll_postfork_child ();
241	#endif	673	#endif
242	}
243		674
		675	ev_io_stop (&sigev);
		676	close (sigpipe [0]);
		677	close (sigpipe [1]);
		678	pipe (sigpipe);
		679	siginit ();
		680	}
		681
		682	/*****************************************************************************/
		683
244	static void	684	static void
245	fd_reify (void)	685	call_pending (EV_P)
246	{	686	{
247	int i;	687	int pri;
248		688
249	for (i = 0; i < fdchangecnt; ++i)	689	for (pri = NUMPRI; pri--; )
250	{	690	while (pendingcnt [pri])
251	int fd = fdchanges [i];
252	ANFD *anfd = anfds + fd;
253	struct ev_io *w;
254
255	int wev = 0;
256
257	for (w = anfd->head; w; w = w->next)
258	wev |= w->events;
259
260	if (anfd->wev != wev)
261	{	691	{
262	method_modify (fd, anfd->wev, wev);	692	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
263	anfd->wev = wev;
264	}
265	}
266		693
267	fdchangecnt = 0;
268	}
269
270	static void
271	call_pending ()
272	{
273	int i;
274
275	for (i = 0; i < pendingcnt; ++i)
276	{
277	ANPENDING *p = pendings + i;
278
279	if (p->w)	694	if (p->w)
280	{	695	{
281	p->w->pending = 0;	696	p->w->pending = 0;
282	p->w->cb (p->w, p->events);	697	p->w->cb (EV_A_ p->w, p->events);
283	}	698	}
284	}	699	}
285
286	pendingcnt = 0;
287	}	700	}
288		701
289	static void	702	static void
290	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	703	timers_reify (EV_P)
291	{	704	{
292	while (timercnt && timers [0]->at <= now)	705	while (timercnt && timers [0]->at <= mn_now)
293	{	706	{
294	struct ev_timer *w = timers [0];	707	struct ev_timer *w = timers [0];
295		708
296	/* first reschedule or stop timer */	709	/* first reschedule or stop timer */
297	if (w->repeat)	710	if (w->repeat)
298	{	711	{
299	if (w->is_abs)	712	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
300	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
301	else
302	w->at = now + w->repeat;	713	w->at = mn_now + w->repeat;
303
304	assert (w->at > now);
305
306	downheap (timers, timercnt, 0);	714	downheap ((WT *)timers, timercnt, 0);
307	}	715	}
308	else	716	else
		717	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		718
		719	event ((W)w, EV_TIMEOUT);
		720	}
		721	}
		722
		723	static void
		724	periodics_reify (EV_P)
		725	{
		726	while (periodiccnt && periodics [0]->at <= rt_now)
		727	{
		728	struct ev_periodic *w = periodics [0];
		729
		730	/* first reschedule or stop timer */
		731	if (w->interval)
309	{	732	{
310	evtimer_stop (w); /* nonrepeating: stop timer */	733	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
311	--timercnt; /* maybe pass by reference instead? */	734	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		735	downheap ((WT *)periodics, periodiccnt, 0);
312	}	736	}
		737	else
		738	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
313		739
314	event ((struct ev_watcher *)w, EV_TIMEOUT);	740	event (EV_A_ (W)w, EV_PERIODIC);
315	}	741	}
316	}	742	}
317		743
318	static void	744	static void
319	time_update ()	745	periodics_reschedule (EV_P_ ev_tstamp diff)
320	{	746	{
321	int i;	747	int i;
322	ev_now = ev_time ();
323		748
324	if (have_monotonic)	749	/* adjust periodics after time jump */
		750	for (i = 0; i < periodiccnt; ++i)
325	{	751	{
326	ev_tstamp odiff = diff;	752	struct ev_periodic *w = periodics [i];
327		753
328	/* detecting time jumps is much more difficult */	754	if (w->interval)
329	for (i = 2; --i; ) /* loop a few times, before making important decisions */
330	{	755	{
331	now = get_clock ();	756	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
332	diff = ev_now - now;
333		757
334	if (fabs (odiff - diff) < MIN_TIMEJUMP)	758	if (fabs (diff) >= 1e-4)
335	return; /* all is well */	759	{
		760	ev_periodic_stop (EV_A_ w);
		761	ev_periodic_start (EV_A_ w);
336		762
337	ev_now = ev_time ();	763	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		764	}
338	}	765	}
		766	}
		767	}
339		768
340	/* time jump detected, reschedule atimers */	769	inline int
341	for (i = 0; i < atimercnt; ++i)	770	time_update_monotonic (EV_P)
		771	{
		772	mn_now = get_clock ();
		773
		774	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		775	{
		776	rt_now = mn_now + diff;
		777	return 0;
		778	}
		779	else
		780	{
		781	now_floor = mn_now;
		782	rt_now = ev_time ();
		783	return 1;
		784	}
		785	}
		786
		787	static void
		788	time_update (EV_P)
		789	{
		790	int i;
		791
		792	#if EV_USE_MONOTONIC
		793	if (expect_true (have_monotonic))
		794	{
		795	if (time_update_monotonic (EV_A))
342	{	796	{
343	struct ev_timer *w = atimers [i];	797	ev_tstamp odiff = diff;
344	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	798
		799	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		800	{
		801	diff = rt_now - mn_now;
		802
		803	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		804	return; /* all is well */
		805
		806	rt_now = ev_time ();
		807	mn_now = get_clock ();
		808	now_floor = mn_now;
		809	}
		810
		811	periodics_reschedule (EV_A_ diff - odiff);
		812	/* no timer adjustment, as the monotonic clock doesn't jump */
345	}	813	}
346	}	814	}
347	else	815	else
		816	#endif
348	{	817	{
349	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	818	rt_now = ev_time ();
350	/* time jump detected, adjust rtimers */	819
		820	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		821	{
		822	periodics_reschedule (EV_A_ rt_now - mn_now);
		823
		824	/* adjust timers. this is easy, as the offset is the same for all */
351	for (i = 0; i < rtimercnt; ++i)	825	for (i = 0; i < timercnt; ++i)
352	rtimers [i]->at += ev_now - now;	826	timers [i]->at += diff;
		827	}
353		828
354	now = ev_now;	829	mn_now = rt_now;
355	}	830	}
356	}	831	}
357		832
358	int ev_loop_done;	833	void
		834	ev_ref (EV_P)
		835	{
		836	++activecnt;
		837	}
359		838
		839	void
		840	ev_unref (EV_P)
		841	{
		842	--activecnt;
		843	}
		844
		845	static int loop_done;
		846
		847	void
360	void ev_loop (int flags)	848	ev_loop (EV_P_ int flags)
361	{	849	{
362	double block;	850	double block;
363	ev_loop_done = flags & EVLOOP_ONESHOT;	851	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
364		852
365	do	853	do
366	{	854	{
		855	/* queue check watchers (and execute them) */
		856	if (expect_false (preparecnt))
		857	{
		858	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		859	call_pending (EV_A);
		860	}
		861
367	/* update fd-related kernel structures */	862	/* update fd-related kernel structures */
368	fd_reify ();	863	fd_reify (EV_A);
369		864
370	/* calculate blocking time */	865	/* calculate blocking time */
		866
		867	/* we only need this for !monotonic clockor timers, but as we basically
		868	always have timers, we just calculate it always */
		869	#if EV_USE_MONOTONIC
		870	if (expect_true (have_monotonic))
		871	time_update_monotonic (EV_A);
		872	else
		873	#endif
		874	{
		875	rt_now = ev_time ();
		876	mn_now = rt_now;
		877	}
		878
371	if (flags & EVLOOP_NONBLOCK)	879	if (flags & EVLOOP_NONBLOCK || idlecnt)
372	block = 0.;	880	block = 0.;
373	else	881	else
374	{	882	{
375	block = MAX_BLOCKTIME;	883	block = MAX_BLOCKTIME;
376		884
377	if (rtimercnt)	885	if (timercnt)
378	{	886	{
379	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	887	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
380	if (block > to) block = to;	888	if (block > to) block = to;
381	}	889	}
382		890
383	if (atimercnt)	891	if (periodiccnt)
384	{	892	{
385	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	893	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
386	if (block > to) block = to;	894	if (block > to) block = to;
387	}	895	}
388		896
389	if (block < 0.) block = 0.;	897	if (block < 0.) block = 0.;
390	}	898	}
391		899
392	method_poll (block);	900	method_poll (EV_A_ block);
393		901
394	/* update ev_now, do magic */	902	/* update rt_now, do magic */
395	time_update ();	903	time_update (EV_A);
396		904
397	/* put pending timers into pendign queue and reschedule them */	905	/* queue pending timers and reschedule them */
398	/* absolute timers first */	906	timers_reify (EV_A); /* relative timers called last */
399	timers_reify (atimers, atimercnt, ev_now);	907	periodics_reify (EV_A); /* absolute timers called first */
400	/* relative timers second */
401	timers_reify (rtimers, rtimercnt, now);
402		908
		909	/* queue idle watchers unless io or timers are pending */
		910	if (!pendingcnt)
		911	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		912
		913	/* queue check watchers, to be executed first */
		914	if (checkcnt)
		915	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		916
403	call_pending ();	917	call_pending (EV_A);
404	}	918	}
405	while (!ev_loop_done);	919	while (activecnt && !loop_done);
406	}
407		920
408	static void	921	if (loop_done != 2)
409	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	922	loop_done = 0;
		923	}
		924
		925	void
		926	ev_unloop (EV_P_ int how)
		927	{
		928	loop_done = how;
		929	}
		930
		931	/*****************************************************************************/
		932
		933	inline void
		934	wlist_add (WL *head, WL elem)
410	{	935	{
411	elem->next = *head;	936	elem->next = *head;
412	*head = elem;	937	*head = elem;
413	}	938	}
414		939
415	static void	940	inline void
416	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	941	wlist_del (WL *head, WL elem)
417	{	942	{
418	while (*head)	943	while (*head)
419	{	944	{
420	if (*head == elem)	945	if (*head == elem)
421	{	946	{
…		…
425		950
426	head = &(*head)->next;	951	head = &(*head)->next;
427	}	952	}
428	}	953	}
429		954
430	static void	955	inline void
431	ev_start (struct ev_watcher *w, int active)	956	ev_clear_pending (EV_P_ W w)
432	{	957	{
		958	if (w->pending)
		959	{
		960	pendings [ABSPRI (w)][w->pending - 1].w = 0;
433	w->pending = 0;	961	w->pending = 0;
		962	}
		963	}
		964
		965	inline void
		966	ev_start (EV_P_ W w, int active)
		967	{
		968	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		969	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		970
434	w->active = active;	971	w->active = active;
		972	ev_ref (EV_A);
435	}	973	}
436		974
437	static void	975	inline void
438	ev_stop (struct ev_watcher *w)	976	ev_stop (EV_P_ W w)
439	{	977	{
440	if (w->pending)	978	ev_unref (EV_A);
441	pendings [w->pending - 1].w = 0;
442
443	w->active = 0;	979	w->active = 0;
444	/* nop */
445	}	980	}
446		981
		982	/*****************************************************************************/
		983
447	void	984	void
448	evio_start (struct ev_io *w)	985	ev_io_start (EV_P_ struct ev_io *w)
449	{	986	{
		987	int fd = w->fd;
		988
450	if (ev_is_active (w))	989	if (ev_is_active (w))
451	return;	990	return;
452		991
453	int fd = w->fd;	992	assert (("ev_io_start called with negative fd", fd >= 0));
454		993
455	ev_start ((struct ev_watcher *)w, 1);	994	ev_start (EV_A_ (W)w, 1);
456	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	995	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
457	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	996	wlist_add ((WL *)&anfds[fd].head, (WL)w);
458		997
459	++fdchangecnt;	998	fd_change (EV_A_ fd);
460	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
461	fdchanges [fdchangecnt - 1] = fd;
462	}	999	}
463		1000
464	void	1001	void
465	evio_stop (struct ev_io *w)	1002	ev_io_stop (EV_P_ struct ev_io *w)
466	{	1003	{
		1004	ev_clear_pending (EV_A_ (W)w);
467	if (!ev_is_active (w))	1005	if (!ev_is_active (w))
468	return;	1006	return;
469		1007
470	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	1008	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
471	ev_stop ((struct ev_watcher *)w);	1009	ev_stop (EV_A_ (W)w);
472		1010
473	++fdchangecnt;	1011	fd_change (EV_A_ w->fd);
474	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
475	fdchanges [fdchangecnt - 1] = w->fd;
476	}	1012	}
477		1013
478	void	1014	void
479	evtimer_start (struct ev_timer *w)	1015	ev_timer_start (EV_P_ struct ev_timer *w)
480	{	1016	{
481	if (ev_is_active (w))	1017	if (ev_is_active (w))
482	return;	1018	return;
483		1019
484	if (w->is_abs)	1020	w->at += mn_now;
		1021
		1022	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1023
		1024	ev_start (EV_A_ (W)w, ++timercnt);
		1025	array_needsize (timers, timermax, timercnt, );
		1026	timers [timercnt - 1] = w;
		1027	upheap ((WT *)timers, timercnt - 1);
		1028	}
		1029
		1030	void
		1031	ev_timer_stop (EV_P_ struct ev_timer *w)
		1032	{
		1033	ev_clear_pending (EV_A_ (W)w);
		1034	if (!ev_is_active (w))
		1035	return;
		1036
		1037	if (w->active < timercnt--)
		1038	{
		1039	timers [w->active - 1] = timers [timercnt];
		1040	downheap ((WT *)timers, timercnt, w->active - 1);
485	{	1041	}
486	/* this formula differs from the one in timer_reify becuse we do not round up */	1042
		1043	w->at = w->repeat;
		1044
		1045	ev_stop (EV_A_ (W)w);
		1046	}
		1047
		1048	void
		1049	ev_timer_again (EV_P_ struct ev_timer *w)
		1050	{
		1051	if (ev_is_active (w))
		1052	{
487	if (w->repeat)	1053	if (w->repeat)
		1054	{
		1055	w->at = mn_now + w->repeat;
		1056	downheap ((WT *)timers, timercnt, w->active - 1);
		1057	}
		1058	else
		1059	ev_timer_stop (EV_A_ w);
		1060	}
		1061	else if (w->repeat)
		1062	ev_timer_start (EV_A_ w);
		1063	}
		1064
		1065	void
		1066	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1067	{
		1068	if (ev_is_active (w))
		1069	return;
		1070
		1071	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1072
		1073	/* this formula differs from the one in periodic_reify because we do not always round up */
		1074	if (w->interval)
488	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1075	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
489		1076
490	ev_start ((struct ev_watcher *)w, ++atimercnt);	1077	ev_start (EV_A_ (W)w, ++periodiccnt);
491	array_needsize (atimers, atimermax, atimercnt, );	1078	array_needsize (periodics, periodicmax, periodiccnt, );
492	atimers [atimercnt - 1] = w;	1079	periodics [periodiccnt - 1] = w;
493	upheap (atimers, atimercnt - 1);	1080	upheap ((WT *)periodics, periodiccnt - 1);
		1081	}
		1082
		1083	void
		1084	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1085	{
		1086	ev_clear_pending (EV_A_ (W)w);
		1087	if (!ev_is_active (w))
		1088	return;
		1089
		1090	if (w->active < periodiccnt--)
494	}	1091	{
		1092	periodics [w->active - 1] = periodics [periodiccnt];
		1093	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		1094	}
		1095
		1096	ev_stop (EV_A_ (W)w);
		1097	}
		1098
		1099	#ifndef SA_RESTART
		1100	# define SA_RESTART 0
		1101	#endif
		1102
		1103	void
		1104	ev_signal_start (EV_P_ struct ev_signal *w)
		1105	{
		1106	if (ev_is_active (w))
		1107	return;
		1108
		1109	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1110
		1111	ev_start (EV_A_ (W)w, 1);
		1112	array_needsize (signals, signalmax, w->signum, signals_init);
		1113	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1114
		1115	if (!w->next)
		1116	{
		1117	struct sigaction sa;
		1118	sa.sa_handler = sighandler;
		1119	sigfillset (&sa.sa_mask);
		1120	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1121	sigaction (w->signum, &sa, 0);
		1122	}
		1123	}
		1124
		1125	void
		1126	ev_signal_stop (EV_P_ struct ev_signal *w)
		1127	{
		1128	ev_clear_pending (EV_A_ (W)w);
		1129	if (!ev_is_active (w))
		1130	return;
		1131
		1132	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1133	ev_stop (EV_A_ (W)w);
		1134
		1135	if (!signals [w->signum - 1].head)
		1136	signal (w->signum, SIG_DFL);
		1137	}
		1138
		1139	void
		1140	ev_idle_start (EV_P_ struct ev_idle *w)
		1141	{
		1142	if (ev_is_active (w))
		1143	return;
		1144
		1145	ev_start (EV_A_ (W)w, ++idlecnt);
		1146	array_needsize (idles, idlemax, idlecnt, );
		1147	idles [idlecnt - 1] = w;
		1148	}
		1149
		1150	void
		1151	ev_idle_stop (EV_P_ struct ev_idle *w)
		1152	{
		1153	ev_clear_pending (EV_A_ (W)w);
		1154	if (ev_is_active (w))
		1155	return;
		1156
		1157	idles [w->active - 1] = idles [--idlecnt];
		1158	ev_stop (EV_A_ (W)w);
		1159	}
		1160
		1161	void
		1162	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1163	{
		1164	if (ev_is_active (w))
		1165	return;
		1166
		1167	ev_start (EV_A_ (W)w, ++preparecnt);
		1168	array_needsize (prepares, preparemax, preparecnt, );
		1169	prepares [preparecnt - 1] = w;
		1170	}
		1171
		1172	void
		1173	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1174	{
		1175	ev_clear_pending (EV_A_ (W)w);
		1176	if (ev_is_active (w))
		1177	return;
		1178
		1179	prepares [w->active - 1] = prepares [--preparecnt];
		1180	ev_stop (EV_A_ (W)w);
		1181	}
		1182
		1183	void
		1184	ev_check_start (EV_P_ struct ev_check *w)
		1185	{
		1186	if (ev_is_active (w))
		1187	return;
		1188
		1189	ev_start (EV_A_ (W)w, ++checkcnt);
		1190	array_needsize (checks, checkmax, checkcnt, );
		1191	checks [checkcnt - 1] = w;
		1192	}
		1193
		1194	void
		1195	ev_check_stop (EV_P_ struct ev_check *w)
		1196	{
		1197	ev_clear_pending (EV_A_ (W)w);
		1198	if (ev_is_active (w))
		1199	return;
		1200
		1201	checks [w->active - 1] = checks [--checkcnt];
		1202	ev_stop (EV_A_ (W)w);
		1203	}
		1204
		1205	void
		1206	ev_child_start (EV_P_ struct ev_child *w)
		1207	{
		1208	if (ev_is_active (w))
		1209	return;
		1210
		1211	ev_start (EV_A_ (W)w, 1);
		1212	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1213	}
		1214
		1215	void
		1216	ev_child_stop (EV_P_ struct ev_child *w)
		1217	{
		1218	ev_clear_pending (EV_A_ (W)w);
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1223	ev_stop (EV_A_ (W)w);
		1224	}
		1225
		1226	/*****************************************************************************/
		1227
		1228	struct ev_once
		1229	{
		1230	struct ev_io io;
		1231	struct ev_timer to;
		1232	void (*cb)(int revents, void *arg);
		1233	void *arg;
		1234	};
		1235
		1236	static void
		1237	once_cb (EV_P_ struct ev_once *once, int revents)
		1238	{
		1239	void (*cb)(int revents, void *arg) = once->cb;
		1240	void *arg = once->arg;
		1241
		1242	ev_io_stop (EV_A_ &once->io);
		1243	ev_timer_stop (EV_A_ &once->to);
		1244	free (once);
		1245
		1246	cb (revents, arg);
		1247	}
		1248
		1249	static void
		1250	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1251	{
		1252	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1253	}
		1254
		1255	static void
		1256	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1257	{
		1258	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1259	}
		1260
		1261	void
		1262	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1263	{
		1264	struct ev_once *once = malloc (sizeof (struct ev_once));
		1265
		1266	if (!once)
		1267	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
495	else	1268	else
496	{	1269	{
497	w->at += now;	1270	once->cb = cb;
		1271	once->arg = arg;
498		1272
499	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1273	ev_watcher_init (&once->io, once_cb_io);
500	array_needsize (rtimers, rtimermax, rtimercnt, );	1274	if (fd >= 0)
501	rtimers [rtimercnt - 1] = w;
502	upheap (rtimers, rtimercnt - 1);
503	}
504
505	}
506
507	void
508	evtimer_stop (struct ev_timer *w)
509	{
510	if (!ev_is_active (w))
511	return;
512
513	if (w->is_abs)
514	{
515	if (w->active < atimercnt--)
516	{	1275	{
517	atimers [w->active - 1] = atimers [atimercnt];	1276	ev_io_set (&once->io, fd, events);
518	downheap (atimers, atimercnt, w->active - 1);	1277	ev_io_start (EV_A_ &once->io);
519	}	1278	}
520	}	1279
521	else	1280	ev_watcher_init (&once->to, once_cb_to);
522	{	1281	if (timeout >= 0.)
523	if (w->active < rtimercnt--)
524	{	1282	{
525	rtimers [w->active - 1] = rtimers [rtimercnt];	1283	ev_timer_set (&once->to, timeout, 0.);
526	downheap (rtimers, rtimercnt, w->active - 1);	1284	ev_timer_start (EV_A_ &once->to);
527	}	1285	}
528	}	1286	}
529
530	ev_stop ((struct ev_watcher *)w);
531	}
532
533	void
534	evsignal_start (struct ev_signal *w)
535	{
536	if (ev_is_active (w))
537	return;
538
539	ev_start ((struct ev_watcher *)w, 1);
540	array_needsize (signals, signalmax, w->signum, signals_init);
541	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
542	}
543
544	void
545	evsignal_stop (struct ev_signal *w)
546	{
547	if (!ev_is_active (w))
548	return;
549
550	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
551	ev_stop ((struct ev_watcher *)w);
552	}	1287	}
553		1288
554	/*****************************************************************************/	1289	/*****************************************************************************/
		1290
555	#if 1	1291	#if 0
		1292
		1293	struct ev_io wio;
556		1294
557	static void	1295	static void
558	sin_cb (struct ev_io *w, int revents)	1296	sin_cb (struct ev_io *w, int revents)
559	{	1297	{
560	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1298	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
562		1300
563	static void	1301	static void
564	ocb (struct ev_timer *w, int revents)	1302	ocb (struct ev_timer *w, int revents)
565	{	1303	{
566	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1304	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
567	evtimer_stop (w);	1305	ev_timer_stop (w);
568	evtimer_start (w);	1306	ev_timer_start (w);
		1307	}
		1308
		1309	static void
		1310	scb (struct ev_signal *w, int revents)
		1311	{
		1312	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1313	ev_io_stop (&wio);
		1314	ev_io_start (&wio);
		1315	}
		1316
		1317	static void
		1318	gcb (struct ev_signal *w, int revents)
		1319	{
		1320	fprintf (stderr, "generic %x\n", revents);
		1321
569	}	1322	}
570		1323
571	int main (void)	1324	int main (void)
572	{	1325	{
573	struct ev_io sin;
574
575	ev_init (0);	1326	ev_init (0);
576		1327
577	evw_init (&sin, sin_cb, 55);
578	evio_set (&sin, 0, EV_READ);	1328	ev_io_init (&wio, sin_cb, 0, EV_READ);
579	evio_start (&sin);	1329	ev_io_start (&wio);
580		1330
581	struct ev_timer t[10000];	1331	struct ev_timer t[10000];
582		1332
583	#if 1	1333	#if 0
584	int i;	1334	int i;
585	for (i = 0; i < 10000; ++i)	1335	for (i = 0; i < 10000; ++i)
586	{	1336	{
587	struct ev_timer *w = t + i;	1337	struct ev_timer *w = t + i;
588	evw_init (w, ocb, i);	1338	ev_watcher_init (w, ocb, i);
589	evtimer_set_abs (w, drand48 (), 0.99775533);	1339	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
590	evtimer_start (w);	1340	ev_timer_start (w);
591	if (drand48 () < 0.5)	1341	if (drand48 () < 0.5)
592	evtimer_stop (w);	1342	ev_timer_stop (w);
593	}	1343	}
594	#endif	1344	#endif
595		1345
596	struct ev_timer t1;	1346	struct ev_timer t1;
597	evw_init (&t1, ocb, 0);	1347	ev_timer_init (&t1, ocb, 5, 10);
598	evtimer_set_abs (&t1, 5, 10);
599	evtimer_start (&t1);	1348	ev_timer_start (&t1);
		1349
		1350	struct ev_signal sig;
		1351	ev_signal_init (&sig, scb, SIGQUIT);
		1352	ev_signal_start (&sig);
		1353
		1354	struct ev_check cw;
		1355	ev_check_init (&cw, gcb);
		1356	ev_check_start (&cw);
		1357
		1358	struct ev_idle iw;
		1359	ev_idle_init (&iw, gcb);
		1360	ev_idle_start (&iw);
600		1361
601	ev_loop (0);	1362	ev_loop (0);
602		1363
603	return 0;	1364	return 0;
604	}	1365	}

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