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Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.50 by root, Sat Nov 3 19:41:55 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>
3	#include <unistd.h>	37	#include <unistd.h>
4	#include <fcntl.h>	38	#include <fcntl.h>
5	#include <signal.h>	39	#include <signal.h>
		40	#include <stddef.h>
6		41
7	#include <stdio.h>	42	#include <stdio.h>
8		43
9	#include <assert.h>	44	#include <assert.h>
10	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
11	#include <sys/time.h>	50	#include <sys/time.h>
12	#include <time.h>	51	#include <time.h>
13		52
		53	/**/
		54
		55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USE_POLL
		64	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
14	#ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
16	#endif	84	#endif
17		85
		86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	88	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	89	#endif
20	#define HAVE_SELECT 1	90
		91	/**/
21		92
22	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
24		97
25	#include "ev.h"	98	#include "ev.h"
26		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		113
27	struct ev_watcher {	114	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);
29	};
30
31	struct ev_watcher_list {	115	typedef struct ev_watcher_list *WL;
32	EV_WATCHER_LIST (ev_watcher_list);	116	typedef struct ev_watcher_time *WT;
33	};
34		117
35	static ev_tstamp now, diff; /* monotonic clock */	118	static ev_tstamp now_floor, now, diff; /* monotonic clock */
36	ev_tstamp ev_now;	119	ev_tstamp ev_now;
37	int ev_method;	120	int ev_method;
38		121
39	static int have_monotonic; /* runtime */	122	static int have_monotonic; /* runtime */
40		123
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
42	static void (*method_modify)(int fd, int oev, int nev);	125	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);	126	static void (*method_poll)(ev_tstamp timeout);
44		127
		128	/*****************************************************************************/
		129
45	ev_tstamp	130	ev_tstamp
46	ev_time (void)	131	ev_time (void)
47	{	132	{
48	#if HAVE_REALTIME	133	#if EV_USE_REALTIME
49	struct timespec ts;	134	struct timespec ts;
50	clock_gettime (CLOCK_REALTIME, &ts);	135	clock_gettime (CLOCK_REALTIME, &ts);
51	return ts.tv_sec + ts.tv_nsec * 1e-9;	136	return ts.tv_sec + ts.tv_nsec * 1e-9;
52	#else	137	#else
53	struct timeval tv;	138	struct timeval tv;
…		…
57	}	142	}
58		143
59	static ev_tstamp	144	static ev_tstamp
60	get_clock (void)	145	get_clock (void)
61	{	146	{
62	#if HAVE_MONOTONIC	147	#if EV_USE_MONOTONIC
63	if (have_monotonic)	148	if (expect_true (have_monotonic))
64	{	149	{
65	struct timespec ts;	150	struct timespec ts;
66	clock_gettime (CLOCK_MONOTONIC, &ts);	151	clock_gettime (CLOCK_MONOTONIC, &ts);
67	return ts.tv_sec + ts.tv_nsec * 1e-9;	152	return ts.tv_sec + ts.tv_nsec * 1e-9;
68	}	153	}
69	#endif	154	#endif
70		155
71	return ev_time ();	156	return ev_time ();
72	}	157	}
73		158
		159	#define array_roundsize(base,n) ((n) | 4 & ~3)
		160
74	#define array_needsize(base,cur,cnt,init) \	161	#define array_needsize(base,cur,cnt,init) \
75	if ((cnt) > cur) \	162	if (expect_false ((cnt) > cur)) \
76	{ \	163	{ \
77	int newcnt = cur ? cur << 1 : 16; \	164	int newcnt = cur; \
78	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	165	do \
		166	{ \
		167	newcnt = array_roundsize (base, newcnt << 1); \
		168	} \
		169	while ((cnt) > newcnt); \
		170	\
79	base = realloc (base, sizeof (*base) * (newcnt)); \	171	base = realloc (base, sizeof (*base) * (newcnt)); \
80	init (base + cur, newcnt - cur); \	172	init (base + cur, newcnt - cur); \
81	cur = newcnt; \	173	cur = newcnt; \
82	}	174	}
83		175
		176	/*****************************************************************************/
		177
84	typedef struct	178	typedef struct
85	{	179	{
86	struct ev_io *head;	180	struct ev_watcher_list *head;
87	unsigned char wev, rev; /* want, received event set */	181	unsigned char events;
		182	unsigned char reify;
88	} ANFD;	183	} ANFD;
89		184
90	static ANFD *anfds;	185	static ANFD *anfds;
91	static int anfdmax;	186	static int anfdmax;
92		187
		188	static void
		189	anfds_init (ANFD *base, int count)
		190	{
		191	while (count--)
		192	{
		193	base->head = 0;
		194	base->events = EV_NONE;
		195	base->reify = 0;
		196
		197	++base;
		198	}
		199	}
		200
		201	typedef struct
		202	{
		203	W w;
		204	int events;
		205	} ANPENDING;
		206
		207	static ANPENDING *pendings [NUMPRI];
		208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
		209
		210	static void
		211	event (W w, int events)
		212	{
		213	if (w->pending)
		214	{
		215	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		216	return;
		217	}
		218
		219	w->pending = ++pendingcnt [ABSPRI (w)];
		220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		221	pendings [ABSPRI (w)][w->pending - 1].w = w;
		222	pendings [ABSPRI (w)][w->pending - 1].events = events;
		223	}
		224
		225	static void
		226	queue_events (W *events, int eventcnt, int type)
		227	{
		228	int i;
		229
		230	for (i = 0; i < eventcnt; ++i)
		231	event (events [i], type);
		232	}
		233
		234	static void
		235	fd_event (int fd, int events)
		236	{
		237	ANFD *anfd = anfds + fd;
		238	struct ev_io *w;
		239
		240	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		241	{
		242	int ev = w->events & events;
		243
		244	if (ev)
		245	event ((W)w, ev);
		246	}
		247	}
		248
		249	/*****************************************************************************/
		250
93	static int *fdchanges;	251	static int *fdchanges;
94	static int fdchangemax, fdchangecnt;	252	static int fdchangemax, fdchangecnt;
95		253
96	static void	254	static void
97	anfds_init (ANFD *base, int count)	255	fd_reify (void)
98	{	256	{
99	while (count--)	257	int i;
100	{	258
101	base->head = 0;	259	for (i = 0; i < fdchangecnt; ++i)
102	base->wev = base->rev = EV_NONE;
103	++base;
104	}	260	{
105	}	261	int fd = fdchanges [i];
106
107	typedef struct
108	{
109	struct ev_watcher *w;
110	int events;
111	} ANPENDING;
112
113	static ANPENDING *pendings;
114	static int pendingmax, pendingcnt;
115
116	static void
117	event (struct ev_watcher *w, int events)
118	{
119	w->pending = ++pendingcnt;
120	array_needsize (pendings, pendingmax, pendingcnt, );
121	pendings [pendingcnt - 1].w = w;
122	pendings [pendingcnt - 1].events = events;
123	}
124
125	static void
126	fd_event (int fd, int events)
127	{
128	ANFD *anfd = anfds + fd;	262	ANFD *anfd = anfds + fd;
		263	struct ev_io *w;
		264
		265	int events = 0;
		266
		267	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		268	events |= w->events;
		269
		270	anfd->reify = 0;
		271
		272	if (anfd->events != events)
		273	{
		274	method_modify (fd, anfd->events, events);
		275	anfd->events = events;
		276	}
		277	}
		278
		279	fdchangecnt = 0;
		280	}
		281
		282	static void
		283	fd_change (int fd)
		284	{
		285	if (anfds [fd].reify || fdchangecnt < 0)
		286	return;
		287
		288	anfds [fd].reify = 1;
		289
		290	++fdchangecnt;
		291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		292	fdchanges [fdchangecnt - 1] = fd;
		293	}
		294
		295	static void
		296	fd_kill (int fd)
		297	{
129	struct ev_io *w;	298	struct ev_io *w;
130		299
131	for (w = anfd->head; w; w = w->next)	300	while ((w = (struct ev_io *)anfds [fd].head))
		301	{
		302	ev_io_stop (w);
		303	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);
		304	}
		305	}
		306
		307	/* called on EBADF to verify fds */
		308	static void
		309	fd_ebadf (void)
		310	{
		311	int fd;
		312
		313	for (fd = 0; fd < anfdmax; ++fd)
		314	if (anfds [fd].events)
		315	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		316	fd_kill (fd);
		317	}
		318
		319	/* called on ENOMEM in select/poll to kill some fds and retry */
		320	static void
		321	fd_enomem (void)
		322	{
		323	int fd = anfdmax;
		324
		325	while (fd--)
		326	if (anfds [fd].events)
132	{	327	{
133	int ev = w->events & events;	328	close (fd);
134		329	fd_kill (fd);
135	if (ev)	330	return;
136	event ((struct ev_watcher *)w, ev);
137	}	331	}
138	}	332	}
139		333
		334	/*****************************************************************************/
		335
140	static struct ev_timer **atimers;	336	static struct ev_timer **timers;
141	static int atimermax, atimercnt;	337	static int timermax, timercnt;
142		338
143	static struct ev_timer **rtimers;	339	static struct ev_periodic **periodics;
144	static int rtimermax, rtimercnt;	340	static int periodicmax, periodiccnt;
145		341
146	static void	342	static void
147	upheap (struct ev_timer **timers, int k)	343	upheap (WT *timers, int k)
148	{	344	{
149	struct ev_timer *w = timers [k];	345	WT w = timers [k];
150		346
151	while (k && timers [k >> 1]->at > w->at)	347	while (k && timers [k >> 1]->at > w->at)
152	{	348	{
153	timers [k] = timers [k >> 1];	349	timers [k] = timers [k >> 1];
154	timers [k]->active = k + 1;	350	timers [k]->active = k + 1;
…		…
159	timers [k]->active = k + 1;	355	timers [k]->active = k + 1;
160		356
161	}	357	}
162		358
163	static void	359	static void
164	downheap (struct ev_timer **timers, int N, int k)	360	downheap (WT *timers, int N, int k)
165	{	361	{
166	struct ev_timer *w = timers [k];	362	WT w = timers [k];
167		363
168	while (k < (N >> 1))	364	while (k < (N >> 1))
169	{	365	{
170	int j = k << 1;	366	int j = k << 1;
171		367
…		…
182		378
183	timers [k] = w;	379	timers [k] = w;
184	timers [k]->active = k + 1;	380	timers [k]->active = k + 1;
185	}	381	}
186		382
		383	/*****************************************************************************/
		384
187	typedef struct	385	typedef struct
188	{	386	{
189	struct ev_signal *head;	387	struct ev_watcher_list *head;
190	sig_atomic_t gotsig;	388	sig_atomic_t volatile gotsig;
191	} ANSIG;	389	} ANSIG;
192		390
193	static ANSIG *signals;	391	static ANSIG *signals;
194	static int signalmax;	392	static int signalmax;
195		393
196	static int sigpipe [2];	394	static int sigpipe [2];
197	static sig_atomic_t gotsig;	395	static sig_atomic_t volatile gotsig;
198	static struct ev_io sigev;	396	static struct ev_io sigev;
199		397
200	static void	398	static void
201	signals_init (ANSIG *base, int count)	399	signals_init (ANSIG *base, int count)
202	{	400	{
203	while (count--)	401	while (count--)
204	{	402	{
205	base->head = 0;	403	base->head = 0;
206	base->gotsig = 0;	404	base->gotsig = 0;
		405
207	++base;	406	++base;
208	}	407	}
209	}	408	}
210		409
211	static void	410	static void
…		…
213	{	412	{
214	signals [signum - 1].gotsig = 1;	413	signals [signum - 1].gotsig = 1;
215		414
216	if (!gotsig)	415	if (!gotsig)
217	{	416	{
		417	int old_errno = errno;
218	gotsig = 1;	418	gotsig = 1;
219	write (sigpipe [1], &gotsig, 1);	419	write (sigpipe [1], &signum, 1);
		420	errno = old_errno;
220	}	421	}
221	}	422	}
222		423
223	static void	424	static void
224	sigcb (struct ev_io *iow, int revents)	425	sigcb (struct ev_io *iow, int revents)
225	{	426	{
226	struct ev_signal *w;	427	struct ev_watcher_list *w;
227	int sig;	428	int signum;
228		429
		430	read (sigpipe [0], &revents, 1);
229	gotsig = 0;	431	gotsig = 0;
230	read (sigpipe [0], &revents, 1);
231		432
232	for (sig = signalmax; sig--; )	433	for (signum = signalmax; signum--; )
233	if (signals [sig].gotsig)	434	if (signals [signum].gotsig)
234	{	435	{
235	signals [sig].gotsig = 0;	436	signals [signum].gotsig = 0;
236		437
237	for (w = signals [sig].head; w; w = w->next)	438	for (w = signals [signum].head; w; w = w->next)
238	event ((struct ev_watcher *)w, EV_SIGNAL);	439	event ((W)w, EV_SIGNAL);
239	}	440	}
240	}	441	}
241		442
242	static void	443	static void
243	siginit (void)	444	siginit (void)
244	{	445	{
		446	#ifndef WIN32
245	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	447	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
246	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	448	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
247		449
248	/* rather than sort out wether we really need nb, set it */	450	/* rather than sort out wether we really need nb, set it */
249	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	451	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
250	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	452	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		453	#endif
251		454
252	evio_set (&sigev, sigpipe [0], EV_READ);	455	ev_io_set (&sigev, sigpipe [0], EV_READ);
253	evio_start (&sigev);	456	ev_io_start (&sigev);
254	}	457	}
255		458
		459	/*****************************************************************************/
		460
		461	static struct ev_idle **idles;
		462	static int idlemax, idlecnt;
		463
		464	static struct ev_prepare **prepares;
		465	static int preparemax, preparecnt;
		466
		467	static struct ev_check **checks;
		468	static int checkmax, checkcnt;
		469
		470	/*****************************************************************************/
		471
		472	static struct ev_child *childs [PID_HASHSIZE];
		473	static struct ev_signal childev;
		474
		475	#ifndef WIN32
		476
		477	#ifndef WCONTINUED
		478	# define WCONTINUED 0
		479	#endif
		480
		481	static void
		482	child_reap (struct ev_signal *sw, int chain, int pid, int status)
		483	{
		484	struct ev_child *w;
		485
		486	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		487	if (w->pid == pid || !w->pid)
		488	{
		489	w->priority = sw->priority; /* need to do it *now* */
		490	w->rpid = pid;
		491	w->rstatus = status;
		492	event ((W)w, EV_CHILD);
		493	}
		494	}
		495
		496	static void
		497	childcb (struct ev_signal *sw, int revents)
		498	{
		499	int pid, status;
		500
		501	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		502	{
		503	/* make sure we are called again until all childs have been reaped */
		504	event ((W)sw, EV_SIGNAL);
		505
		506	child_reap (sw, pid, pid, status);
		507	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		508	}
		509	}
		510
		511	#endif
		512
		513	/*****************************************************************************/
		514
		515	#if EV_USE_KQUEUE
		516	# include "ev_kqueue.c"
		517	#endif
256	#if HAVE_EPOLL	518	#if EV_USE_EPOLL
257	# include "ev_epoll.c"	519	# include "ev_epoll.c"
258	#endif	520	#endif
		521	#if EV_USE_POLL
		522	# include "ev_poll.c"
		523	#endif
259	#if HAVE_SELECT	524	#if EV_USE_SELECT
260	# include "ev_select.c"	525	# include "ev_select.c"
261	#endif	526	#endif
262		527
263	int ev_init (int flags)	528	int
		529	ev_version_major (void)
264	{	530	{
265	#if HAVE_MONOTONIC	531	return EV_VERSION_MAJOR;
266	{	532	}
267	struct timespec ts;
268	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
269	have_monotonic = 1;
270	}
271	#endif
272		533
273	ev_now = ev_time ();	534	int
274	now = get_clock ();	535	ev_version_minor (void)
275	diff = ev_now - now;	536	{
		537	return EV_VERSION_MINOR;
		538	}
276		539
277	if (pipe (sigpipe))	540	/* return true if we are running with elevated privileges and should ignore env variables */
		541	static int
		542	enable_secure ()
		543	{
		544	#ifdef WIN32
278	return 0;	545	return 0;
279		546	#else
280	ev_method = EVMETHOD_NONE;	547	return getuid () != geteuid ()
281	#if HAVE_EPOLL	548	|| getgid () != getegid ();
282	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
283	#endif	549	#endif
284	#if HAVE_SELECT	550	}
285	if (ev_method == EVMETHOD_NONE) select_init (flags);
286	#endif
287		551
		552	int ev_init (int methods)
		553	{
288	if (ev_method)	554	if (!ev_method)
		555	{
		556	#if EV_USE_MONOTONIC
289	{	557	{
		558	struct timespec ts;
		559	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		560	have_monotonic = 1;
		561	}
		562	#endif
		563
		564	ev_now = ev_time ();
		565	now = get_clock ();
		566	now_floor = now;
		567	diff = ev_now - now;
		568
		569	if (pipe (sigpipe))
		570	return 0;
		571
		572	if (methods == EVMETHOD_AUTO)
		573	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		574	methods = atoi (getenv ("LIBEV_METHODS"));
		575	else
		576	methods = EVMETHOD_ANY;
		577
		578	ev_method = 0;
		579	#if EV_USE_KQUEUE
		580	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
		581	#endif
		582	#if EV_USE_EPOLL
		583	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
		584	#endif
		585	#if EV_USE_POLL
		586	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
		587	#endif
		588	#if EV_USE_SELECT
		589	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
		590	#endif
		591
		592	if (ev_method)
		593	{
290	evw_init (&sigev, sigcb, 0);	594	ev_watcher_init (&sigev, sigcb);
		595	ev_set_priority (&sigev, EV_MAXPRI);
291	siginit ();	596	siginit ();
		597
		598	#ifndef WIN32
		599	ev_signal_init (&childev, childcb, SIGCHLD);
		600	ev_set_priority (&childev, EV_MAXPRI);
		601	ev_signal_start (&childev);
		602	#endif
		603	}
292	}	604	}
293		605
294	return ev_method;	606	return ev_method;
295	}	607	}
296		608
297	void ev_prefork (void)	609	/*****************************************************************************/
298	{
299	}
300		610
		611	void
		612	ev_fork_prepare (void)
		613	{
		614	/* nop */
		615	}
		616
		617	void
301	void ev_postfork_parent (void)	618	ev_fork_parent (void)
302	{	619	{
		620	/* nop */
303	}	621	}
304		622
		623	void
305	void ev_postfork_child (void)	624	ev_fork_child (void)
306	{	625	{
307	#if HAVE_EPOLL	626	#if EV_USE_EPOLL
308	if (ev_method == EVMETHOD_EPOLL)	627	if (ev_method == EVMETHOD_EPOLL)
309	epoll_postfork_child ();	628	epoll_postfork_child ();
310	#endif	629	#endif
311		630
312	evio_stop (&sigev);	631	ev_io_stop (&sigev);
313	close (sigpipe [0]);	632	close (sigpipe [0]);
314	close (sigpipe [1]);	633	close (sigpipe [1]);
315	pipe (sigpipe);	634	pipe (sigpipe);
316	siginit ();	635	siginit ();
317	}	636	}
318		637
		638	/*****************************************************************************/
		639
319	static void	640	static void
320	fd_reify (void)	641	call_pending (void)
321	{	642	{
322	int i;	643	int pri;
323		644
324	for (i = 0; i < fdchangecnt; ++i)	645	for (pri = NUMPRI; pri--; )
325	{	646	while (pendingcnt [pri])
326	int fd = fdchanges [i];
327	ANFD *anfd = anfds + fd;
328	struct ev_io *w;
329
330	int wev = 0;
331
332	for (w = anfd->head; w; w = w->next)
333	wev |= w->events;
334
335	if (anfd->wev != wev)
336	{	647	{
337	method_modify (fd, anfd->wev, wev);	648	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
338	anfd->wev = wev;
339	}
340	}
341		649
342	fdchangecnt = 0;
343	}
344
345	static void
346	call_pending ()
347	{
348	int i;
349
350	for (i = 0; i < pendingcnt; ++i)
351	{
352	ANPENDING *p = pendings + i;
353
354	if (p->w)	650	if (p->w)
355	{	651	{
356	p->w->pending = 0;	652	p->w->pending = 0;
357	p->w->cb (p->w, p->events);	653	p->w->cb (p->w, p->events);
358	}	654	}
359	}	655	}
360
361	pendingcnt = 0;
362	}	656	}
363		657
364	static void	658	static void
365	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	659	timers_reify (void)
366	{	660	{
367	while (timercnt && timers [0]->at <= now)	661	while (timercnt && timers [0]->at <= now)
368	{	662	{
369	struct ev_timer *w = timers [0];	663	struct ev_timer *w = timers [0];
370		664
371	/* first reschedule or stop timer */	665	/* first reschedule or stop timer */
372	if (w->repeat)	666	if (w->repeat)
373	{	667	{
374	if (w->is_abs)	668	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
375	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
376	else
377	w->at = now + w->repeat;	669	w->at = now + w->repeat;
378
379	assert (w->at > now);
380
381	downheap (timers, timercnt, 0);	670	downheap ((WT *)timers, timercnt, 0);
382	}	671	}
383	else	672	else
		673	ev_timer_stop (w); /* nonrepeating: stop timer */
		674
		675	event ((W)w, EV_TIMEOUT);
		676	}
		677	}
		678
		679	static void
		680	periodics_reify (void)
		681	{
		682	while (periodiccnt && periodics [0]->at <= ev_now)
		683	{
		684	struct ev_periodic *w = periodics [0];
		685
		686	/* first reschedule or stop timer */
		687	if (w->interval)
384	{	688	{
385	evtimer_stop (w); /* nonrepeating: stop timer */	689	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
386	--timercnt; /* maybe pass by reference instead? */	690	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));
		691	downheap ((WT *)periodics, periodiccnt, 0);
387	}	692	}
		693	else
		694	ev_periodic_stop (w); /* nonrepeating: stop timer */
388		695
389	event ((struct ev_watcher *)w, EV_TIMEOUT);	696	event ((W)w, EV_PERIODIC);
390	}	697	}
391	}	698	}
392		699
393	static void	700	static void
394	time_update ()	701	periodics_reschedule (ev_tstamp diff)
395	{	702	{
396	int i;	703	int i;
397	ev_now = ev_time ();
398		704
399	if (have_monotonic)	705	/* adjust periodics after time jump */
		706	for (i = 0; i < periodiccnt; ++i)
400	{	707	{
401	ev_tstamp odiff = diff;	708	struct ev_periodic *w = periodics [i];
402		709
403	/* detecting time jumps is much more difficult */	710	if (w->interval)
404	for (i = 2; --i; ) /* loop a few times, before making important decisions */
405	{	711	{
406	now = get_clock ();	712	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
407	diff = ev_now - now;
408		713
409	if (fabs (odiff - diff) < MIN_TIMEJUMP)	714	if (fabs (diff) >= 1e-4)
410	return; /* all is well */	715	{
		716	ev_periodic_stop (w);
		717	ev_periodic_start (w);
411		718
412	ev_now = ev_time ();	719	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		720	}
413	}	721	}
		722	}
		723	}
414		724
415	/* time jump detected, reschedule atimers */	725	static int
416	for (i = 0; i < atimercnt; ++i)	726	time_update_monotonic (void)
		727	{
		728	now = get_clock ();
		729
		730	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
		731	{
		732	ev_now = now + diff;
		733	return 0;
		734	}
		735	else
		736	{
		737	now_floor = now;
		738	ev_now = ev_time ();
		739	return 1;
		740	}
		741	}
		742
		743	static void
		744	time_update (void)
		745	{
		746	int i;
		747
		748	#if EV_USE_MONOTONIC
		749	if (expect_true (have_monotonic))
		750	{
		751	if (time_update_monotonic ())
417	{	752	{
418	struct ev_timer *w = atimers [i];	753	ev_tstamp odiff = diff;
419	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	754
		755	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		756	{
		757	diff = ev_now - now;
		758
		759	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		760	return; /* all is well */
		761
		762	ev_now = ev_time ();
		763	now = get_clock ();
		764	now_floor = now;
		765	}
		766
		767	periodics_reschedule (diff - odiff);
		768	/* no timer adjustment, as the monotonic clock doesn't jump */
420	}	769	}
421	}	770	}
422	else	771	else
		772	#endif
423	{	773	{
		774	ev_now = ev_time ();
		775
424	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	776	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
425	/* time jump detected, adjust rtimers */	777	{
		778	periodics_reschedule (ev_now - now);
		779
		780	/* adjust timers. this is easy, as the offset is the same for all */
426	for (i = 0; i < rtimercnt; ++i)	781	for (i = 0; i < timercnt; ++i)
427	rtimers [i]->at += ev_now - now;	782	timers [i]->at += diff;
		783	}
428		784
429	now = ev_now;	785	now = ev_now;
430	}	786	}
431	}	787	}
432		788
433	int ev_loop_done;	789	int ev_loop_done;
434		790
435	void ev_loop (int flags)	791	void ev_loop (int flags)
436	{	792	{
437	double block;	793	double block;
438	ev_loop_done = flags & EVLOOP_ONESHOT;	794	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
439		795
440	do	796	do
441	{	797	{
		798	/* queue check watchers (and execute them) */
		799	if (expect_false (preparecnt))
		800	{
		801	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		802	call_pending ();
		803	}
		804
442	/* update fd-related kernel structures */	805	/* update fd-related kernel structures */
443	fd_reify ();	806	fd_reify ();
444		807
445	/* calculate blocking time */	808	/* calculate blocking time */
		809
		810	/* we only need this for !monotonic clockor timers, but as we basically
		811	always have timers, we just calculate it always */
		812	#if EV_USE_MONOTONIC
		813	if (expect_true (have_monotonic))
		814	time_update_monotonic ();
		815	else
		816	#endif
		817	{
		818	ev_now = ev_time ();
		819	now = ev_now;
		820	}
		821
446	if (flags & EVLOOP_NONBLOCK)	822	if (flags & EVLOOP_NONBLOCK || idlecnt)
447	block = 0.;	823	block = 0.;
448	else	824	else
449	{	825	{
450	block = MAX_BLOCKTIME;	826	block = MAX_BLOCKTIME;
451		827
452	if (rtimercnt)	828	if (timercnt)
453	{	829	{
454	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	830	ev_tstamp to = timers [0]->at - now + method_fudge;
455	if (block > to) block = to;	831	if (block > to) block = to;
456	}	832	}
457		833
458	if (atimercnt)	834	if (periodiccnt)
459	{	835	{
460	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	836	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
461	if (block > to) block = to;	837	if (block > to) block = to;
462	}	838	}
463		839
464	if (block < 0.) block = 0.;	840	if (block < 0.) block = 0.;
465	}	841	}
…		…
467	method_poll (block);	843	method_poll (block);
468		844
469	/* update ev_now, do magic */	845	/* update ev_now, do magic */
470	time_update ();	846	time_update ();
471		847
472	/* put pending timers into pendign queue and reschedule them */	848	/* queue pending timers and reschedule them */
473	/* absolute timers first */	849	timers_reify (); /* relative timers called last */
474	timers_reify (atimers, atimercnt, ev_now);	850	periodics_reify (); /* absolute timers called first */
475	/* relative timers second */	851
476	timers_reify (rtimers, rtimercnt, now);	852	/* queue idle watchers unless io or timers are pending */
		853	if (!pendingcnt)
		854	queue_events ((W *)idles, idlecnt, EV_IDLE);
		855
		856	/* queue check watchers, to be executed first */
		857	if (checkcnt)
		858	queue_events ((W *)checks, checkcnt, EV_CHECK);
477		859
478	call_pending ();	860	call_pending ();
479	}	861	}
480	while (!ev_loop_done);	862	while (!ev_loop_done);
481	}
482		863
		864	if (ev_loop_done != 2)
		865	ev_loop_done = 0;
		866	}
		867
		868	/*****************************************************************************/
		869
483	static void	870	static void
484	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	871	wlist_add (WL *head, WL elem)
485	{	872	{
486	elem->next = *head;	873	elem->next = *head;
487	*head = elem;	874	*head = elem;
488	}	875	}
489		876
490	static void	877	static void
491	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	878	wlist_del (WL *head, WL elem)
492	{	879	{
493	while (*head)	880	while (*head)
494	{	881	{
495	if (*head == elem)	882	if (*head == elem)
496	{	883	{
…		…
501	head = &(*head)->next;	888	head = &(*head)->next;
502	}	889	}
503	}	890	}
504		891
505	static void	892	static void
506	ev_start (struct ev_watcher *w, int active)	893	ev_clear_pending (W w)
507	{	894	{
		895	if (w->pending)
		896	{
		897	pendings [ABSPRI (w)][w->pending - 1].w = 0;
508	w->pending = 0;	898	w->pending = 0;
		899	}
		900	}
		901
		902	static void
		903	ev_start (W w, int active)
		904	{
		905	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		906	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		907
509	w->active = active;	908	w->active = active;
510	}	909	}
511		910
512	static void	911	static void
513	ev_stop (struct ev_watcher *w)	912	ev_stop (W w)
514	{	913	{
515	if (w->pending)
516	pendings [w->pending - 1].w = 0;
517
518	w->active = 0;	914	w->active = 0;
519	/* nop */
520	}	915	}
521		916
		917	/*****************************************************************************/
		918
522	void	919	void
523	evio_start (struct ev_io *w)	920	ev_io_start (struct ev_io *w)
524	{	921	{
		922	int fd = w->fd;
		923
525	if (ev_is_active (w))	924	if (ev_is_active (w))
526	return;	925	return;
527		926
528	int fd = w->fd;	927	assert (("ev_io_start called with negative fd", fd >= 0));
529		928
530	ev_start ((struct ev_watcher *)w, 1);	929	ev_start ((W)w, 1);
531	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	930	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
532	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	931	wlist_add ((WL *)&anfds[fd].head, (WL)w);
533		932
534	++fdchangecnt;	933	fd_change (fd);
535	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536	fdchanges [fdchangecnt - 1] = fd;
537	}	934	}
538		935
539	void	936	void
540	evio_stop (struct ev_io *w)	937	ev_io_stop (struct ev_io *w)
541	{	938	{
		939	ev_clear_pending ((W)w);
542	if (!ev_is_active (w))	940	if (!ev_is_active (w))
543	return;	941	return;
544		942
545	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	943	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
546	ev_stop ((struct ev_watcher *)w);	944	ev_stop ((W)w);
547		945
548	++fdchangecnt;	946	fd_change (w->fd);
549	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550	fdchanges [fdchangecnt - 1] = w->fd;
551	}	947	}
552		948
553	void	949	void
554	evtimer_start (struct ev_timer *w)	950	ev_timer_start (struct ev_timer *w)
555	{	951	{
556	if (ev_is_active (w))	952	if (ev_is_active (w))
557	return;	953	return;
558		954
559	if (w->is_abs)	955	w->at += now;
		956
		957	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		958
		959	ev_start ((W)w, ++timercnt);
		960	array_needsize (timers, timermax, timercnt, );
		961	timers [timercnt - 1] = w;
		962	upheap ((WT *)timers, timercnt - 1);
		963	}
		964
		965	void
		966	ev_timer_stop (struct ev_timer *w)
		967	{
		968	ev_clear_pending ((W)w);
		969	if (!ev_is_active (w))
		970	return;
		971
		972	if (w->active < timercnt--)
		973	{
		974	timers [w->active - 1] = timers [timercnt];
		975	downheap ((WT *)timers, timercnt, w->active - 1);
560	{	976	}
561	/* this formula differs from the one in timer_reify becuse we do not round up */	977
		978	w->at = w->repeat;
		979
		980	ev_stop ((W)w);
		981	}
		982
		983	void
		984	ev_timer_again (struct ev_timer *w)
		985	{
		986	if (ev_is_active (w))
		987	{
562	if (w->repeat)	988	if (w->repeat)
		989	{
		990	w->at = now + w->repeat;
		991	downheap ((WT *)timers, timercnt, w->active - 1);
		992	}
		993	else
		994	ev_timer_stop (w);
		995	}
		996	else if (w->repeat)
		997	ev_timer_start (w);
		998	}
		999
		1000	void
		1001	ev_periodic_start (struct ev_periodic *w)
		1002	{
		1003	if (ev_is_active (w))
		1004	return;
		1005
		1006	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1007
		1008	/* this formula differs from the one in periodic_reify because we do not always round up */
		1009	if (w->interval)
563	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1010	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
564		1011
565	ev_start ((struct ev_watcher *)w, ++atimercnt);	1012	ev_start ((W)w, ++periodiccnt);
566	array_needsize (atimers, atimermax, atimercnt, );	1013	array_needsize (periodics, periodicmax, periodiccnt, );
567	atimers [atimercnt - 1] = w;	1014	periodics [periodiccnt - 1] = w;
568	upheap (atimers, atimercnt - 1);	1015	upheap ((WT *)periodics, periodiccnt - 1);
569	}
570	else
571	{
572	w->at += now;
573
574	ev_start ((struct ev_watcher *)w, ++rtimercnt);
575	array_needsize (rtimers, rtimermax, rtimercnt, );
576	rtimers [rtimercnt - 1] = w;
577	upheap (rtimers, rtimercnt - 1);
578	}
579
580	}	1016	}
581		1017
582	void	1018	void
583	evtimer_stop (struct ev_timer *w)	1019	ev_periodic_stop (struct ev_periodic *w)
584	{	1020	{
		1021	ev_clear_pending ((W)w);
585	if (!ev_is_active (w))	1022	if (!ev_is_active (w))
586	return;	1023	return;
587		1024
588	if (w->is_abs)
589	{
590	if (w->active < atimercnt--)	1025	if (w->active < periodiccnt--)
591	{
592	atimers [w->active - 1] = atimers [atimercnt];
593	downheap (atimers, atimercnt, w->active - 1);
594	}
595	}	1026	{
596	else	1027	periodics [w->active - 1] = periodics [periodiccnt];
		1028	downheap ((WT *)periodics, periodiccnt, w->active - 1);
597	{	1029	}
598	if (w->active < rtimercnt--)
599	{
600	rtimers [w->active - 1] = rtimers [rtimercnt];
601	downheap (rtimers, rtimercnt, w->active - 1);
602	}
603	}
604		1030
605	ev_stop ((struct ev_watcher *)w);	1031	ev_stop ((W)w);
606	}	1032	}
607		1033
		1034	#ifndef SA_RESTART
		1035	# define SA_RESTART 0
		1036	#endif
		1037
608	void	1038	void
609	evsignal_start (struct ev_signal *w)	1039	ev_signal_start (struct ev_signal *w)
610	{	1040	{
611	if (ev_is_active (w))	1041	if (ev_is_active (w))
612	return;	1042	return;
613		1043
614	ev_start ((struct ev_watcher *)w, 1);	1044	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1045
		1046	ev_start ((W)w, 1);
615	array_needsize (signals, signalmax, w->signum, signals_init);	1047	array_needsize (signals, signalmax, w->signum, signals_init);
616	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1048	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
617		1049
618	if (!w->next)	1050	if (!w->next)
619	{	1051	{
620	struct sigaction sa;	1052	struct sigaction sa;
621	sa.sa_handler = sighandler;	1053	sa.sa_handler = sighandler;
622	sigfillset (&sa.sa_mask);	1054	sigfillset (&sa.sa_mask);
623	sa.sa_flags = 0;	1055	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
624	sigaction (w->signum, &sa, 0);	1056	sigaction (w->signum, &sa, 0);
625	}	1057	}
626	}	1058	}
627		1059
628	void	1060	void
629	evsignal_stop (struct ev_signal *w)	1061	ev_signal_stop (struct ev_signal *w)
630	{	1062	{
		1063	ev_clear_pending ((W)w);
631	if (!ev_is_active (w))	1064	if (!ev_is_active (w))
632	return;	1065	return;
633		1066
634	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1067	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
635	ev_stop ((struct ev_watcher *)w);	1068	ev_stop ((W)w);
636		1069
637	if (!signals [w->signum - 1].head)	1070	if (!signals [w->signum - 1].head)
638	signal (w->signum, SIG_DFL);	1071	signal (w->signum, SIG_DFL);
639	}	1072	}
640		1073
		1074	void
		1075	ev_idle_start (struct ev_idle *w)
		1076	{
		1077	if (ev_is_active (w))
		1078	return;
		1079
		1080	ev_start ((W)w, ++idlecnt);
		1081	array_needsize (idles, idlemax, idlecnt, );
		1082	idles [idlecnt - 1] = w;
		1083	}
		1084
		1085	void
		1086	ev_idle_stop (struct ev_idle *w)
		1087	{
		1088	ev_clear_pending ((W)w);
		1089	if (ev_is_active (w))
		1090	return;
		1091
		1092	idles [w->active - 1] = idles [--idlecnt];
		1093	ev_stop ((W)w);
		1094	}
		1095
		1096	void
		1097	ev_prepare_start (struct ev_prepare *w)
		1098	{
		1099	if (ev_is_active (w))
		1100	return;
		1101
		1102	ev_start ((W)w, ++preparecnt);
		1103	array_needsize (prepares, preparemax, preparecnt, );
		1104	prepares [preparecnt - 1] = w;
		1105	}
		1106
		1107	void
		1108	ev_prepare_stop (struct ev_prepare *w)
		1109	{
		1110	ev_clear_pending ((W)w);
		1111	if (ev_is_active (w))
		1112	return;
		1113
		1114	prepares [w->active - 1] = prepares [--preparecnt];
		1115	ev_stop ((W)w);
		1116	}
		1117
		1118	void
		1119	ev_check_start (struct ev_check *w)
		1120	{
		1121	if (ev_is_active (w))
		1122	return;
		1123
		1124	ev_start ((W)w, ++checkcnt);
		1125	array_needsize (checks, checkmax, checkcnt, );
		1126	checks [checkcnt - 1] = w;
		1127	}
		1128
		1129	void
		1130	ev_check_stop (struct ev_check *w)
		1131	{
		1132	ev_clear_pending ((W)w);
		1133	if (ev_is_active (w))
		1134	return;
		1135
		1136	checks [w->active - 1] = checks [--checkcnt];
		1137	ev_stop ((W)w);
		1138	}
		1139
		1140	void
		1141	ev_child_start (struct ev_child *w)
		1142	{
		1143	if (ev_is_active (w))
		1144	return;
		1145
		1146	ev_start ((W)w, 1);
		1147	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1148	}
		1149
		1150	void
		1151	ev_child_stop (struct ev_child *w)
		1152	{
		1153	ev_clear_pending ((W)w);
		1154	if (ev_is_active (w))
		1155	return;
		1156
		1157	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1158	ev_stop ((W)w);
		1159	}
		1160
641	/*****************************************************************************/	1161	/*****************************************************************************/
		1162
		1163	struct ev_once
		1164	{
		1165	struct ev_io io;
		1166	struct ev_timer to;
		1167	void (*cb)(int revents, void *arg);
		1168	void *arg;
		1169	};
		1170
		1171	static void
		1172	once_cb (struct ev_once *once, int revents)
		1173	{
		1174	void (*cb)(int revents, void *arg) = once->cb;
		1175	void *arg = once->arg;
		1176
		1177	ev_io_stop (&once->io);
		1178	ev_timer_stop (&once->to);
		1179	free (once);
		1180
		1181	cb (revents, arg);
		1182	}
		1183
		1184	static void
		1185	once_cb_io (struct ev_io *w, int revents)
		1186	{
		1187	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1188	}
		1189
		1190	static void
		1191	once_cb_to (struct ev_timer *w, int revents)
		1192	{
		1193	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1194	}
		1195
		1196	void
		1197	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1198	{
		1199	struct ev_once *once = malloc (sizeof (struct ev_once));
		1200
		1201	if (!once)
		1202	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1203	else
		1204	{
		1205	once->cb = cb;
		1206	once->arg = arg;
		1207
		1208	ev_watcher_init (&once->io, once_cb_io);
		1209	if (fd >= 0)
		1210	{
		1211	ev_io_set (&once->io, fd, events);
		1212	ev_io_start (&once->io);
		1213	}
		1214
		1215	ev_watcher_init (&once->to, once_cb_to);
		1216	if (timeout >= 0.)
		1217	{
		1218	ev_timer_set (&once->to, timeout, 0.);
		1219	ev_timer_start (&once->to);
		1220	}
		1221	}
		1222	}
		1223
		1224	/*****************************************************************************/
		1225
642	#if 1	1226	#if 0
		1227
		1228	struct ev_io wio;
643		1229
644	static void	1230	static void
645	sin_cb (struct ev_io *w, int revents)	1231	sin_cb (struct ev_io *w, int revents)
646	{	1232	{
647	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1233	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
649		1235
650	static void	1236	static void
651	ocb (struct ev_timer *w, int revents)	1237	ocb (struct ev_timer *w, int revents)
652	{	1238	{
653	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1239	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
654	evtimer_stop (w);	1240	ev_timer_stop (w);
655	evtimer_start (w);	1241	ev_timer_start (w);
656	}	1242	}
657		1243
658	static void	1244	static void
659	scb (struct ev_signal *w, int revents)	1245	scb (struct ev_signal *w, int revents)
660	{	1246	{
661	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1247	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1248	ev_io_stop (&wio);
		1249	ev_io_start (&wio);
		1250	}
		1251
		1252	static void
		1253	gcb (struct ev_signal *w, int revents)
		1254	{
		1255	fprintf (stderr, "generic %x\n", revents);
		1256
662	}	1257	}
663		1258
664	int main (void)	1259	int main (void)
665	{	1260	{
666	struct ev_io sin;
667
668	ev_init (0);	1261	ev_init (0);
669		1262
670	evw_init (&sin, sin_cb, 55);
671	evio_set (&sin, 0, EV_READ);	1263	ev_io_init (&wio, sin_cb, 0, EV_READ);
672	evio_start (&sin);	1264	ev_io_start (&wio);
673		1265
674	struct ev_timer t[10000];	1266	struct ev_timer t[10000];
675		1267
676	#if 0	1268	#if 0
677	int i;	1269	int i;
678	for (i = 0; i < 10000; ++i)	1270	for (i = 0; i < 10000; ++i)
679	{	1271	{
680	struct ev_timer *w = t + i;	1272	struct ev_timer *w = t + i;
681	evw_init (w, ocb, i);	1273	ev_watcher_init (w, ocb, i);
682	evtimer_set_abs (w, drand48 (), 0.99775533);	1274	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
683	evtimer_start (w);	1275	ev_timer_start (w);
684	if (drand48 () < 0.5)	1276	if (drand48 () < 0.5)
685	evtimer_stop (w);	1277	ev_timer_stop (w);
686	}	1278	}
687	#endif	1279	#endif
688		1280
689	struct ev_timer t1;	1281	struct ev_timer t1;
690	evw_init (&t1, ocb, 0);	1282	ev_timer_init (&t1, ocb, 5, 10);
691	evtimer_set_abs (&t1, 5, 10);
692	evtimer_start (&t1);	1283	ev_timer_start (&t1);
693		1284
694	struct ev_signal sig;	1285	struct ev_signal sig;
695	evw_init (&sig, scb, 65535);
696	evsignal_set (&sig, SIGQUIT);	1286	ev_signal_init (&sig, scb, SIGQUIT);
697	evsignal_start (&sig);	1287	ev_signal_start (&sig);
		1288
		1289	struct ev_check cw;
		1290	ev_check_init (&cw, gcb);
		1291	ev_check_start (&cw);
		1292
		1293	struct ev_idle iw;
		1294	ev_idle_init (&iw, gcb);
		1295	ev_idle_start (&iw);
698		1296
699	ev_loop (0);	1297	ev_loop (0);
700		1298
701	return 0;	1299	return 0;
702	}	1300	}

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