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Comparing libev/ev.c (file contents):
Revision 1.25 by root, Wed Oct 31 21:34:45 2007 UTC vs.
Revision 1.86 by root, Sat Nov 10 03:19:21 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	59	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	60	#include <stddef.h>
36		61
37	#include <stdio.h>	62	#include <stdio.h>
38		63
39	#include <assert.h>	64	#include <assert.h>
40	#include <errno.h>	65	#include <errno.h>
41	#include <sys/types.h>	66	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	67	#include <time.h>
45		68
		69	#include <signal.h>
		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
46	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
		80	#endif
		81
		82	#ifndef EV_USE_SELECT
		83	# define EV_USE_SELECT 1
		84	#endif
		85
		86	#ifndef EV_USE_POLL
		87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		88	#endif
		89
		90	#ifndef EV_USE_EPOLL
		91	# define EV_USE_EPOLL 0
		92	#endif
		93
		94	#ifndef EV_USE_KQUEUE
		95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
49	# endif	105	# endif
50	#endif	106	#endif
51		107
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
62	#endif	110	#endif
		111
		112	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
		121	# define EV_USE_REALTIME 0
		122	#endif
		123
		124	/**/
63		125
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		129	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
67		130
		131	#ifdef EV_H
		132	# include EV_H
		133	#else
68	#include "ev.h"	134	# include "ev.h"
		135	#endif
		136
		137	#if __GNUC__ >= 3
		138	# define expect(expr,value) __builtin_expect ((expr),(value))
		139	# define inline inline
		140	#else
		141	# define expect(expr,value) (expr)
		142	# define inline static
		143	#endif
		144
		145	#define expect_false(expr) expect ((expr) != 0, 0)
		146	#define expect_true(expr) expect ((expr) != 0, 1)
		147
		148	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		149	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		150
70	typedef struct ev_watcher *W;	151	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	152	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	153	typedef struct ev_watcher_time *WT;
73		154
74	static ev_tstamp now, diff; /* monotonic clock */	155	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77		156
78	static int have_monotonic; /* runtime */	157	#include "ev_win32.c"
79
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		158
84	/*****************************************************************************/	159	/*****************************************************************************/
85		160
86	ev_tstamp	161	static void (*syserr_cb)(const char *msg);
		162
		163	void ev_set_syserr_cb (void (*cb)(const char *msg))
		164	{
		165	syserr_cb = cb;
		166	}
		167
		168	static void
		169	syserr (const char *msg)
		170	{
		171	if (!msg)
		172	msg = "(libev) system error";
		173
		174	if (syserr_cb)
		175	syserr_cb (msg);
		176	else
		177	{
		178	perror (msg);
		179	abort ();
		180	}
		181	}
		182
		183	static void *(*alloc)(void *ptr, long size);
		184
		185	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		186	{
		187	alloc = cb;
		188	}
		189
		190	static void *
		191	ev_realloc (void *ptr, long size)
		192	{
		193	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		194
		195	if (!ptr && size)
		196	{
		197	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		198	abort ();
		199	}
		200
		201	return ptr;
		202	}
		203
		204	#define ev_malloc(size) ev_realloc (0, (size))
		205	#define ev_free(ptr) ev_realloc ((ptr), 0)
		206
		207	/*****************************************************************************/
		208
		209	typedef struct
		210	{
		211	WL head;
		212	unsigned char events;
		213	unsigned char reify;
		214	} ANFD;
		215
		216	typedef struct
		217	{
		218	W w;
		219	int events;
		220	} ANPENDING;
		221
		222	#if EV_MULTIPLICITY
		223
		224	struct ev_loop
		225	{
		226	ev_tstamp ev_rt_now;
		227	#define VAR(name,decl) decl;
		228	#include "ev_vars.h"
		229	#undef VAR
		230	};
		231	#include "ev_wrap.h"
		232
		233	struct ev_loop default_loop_struct;
		234	static struct ev_loop *default_loop;
		235
		236	#else
		237
		238	ev_tstamp ev_rt_now;
		239	#define VAR(name,decl) static decl;
		240	#include "ev_vars.h"
		241	#undef VAR
		242
		243	static int default_loop;
		244
		245	#endif
		246
		247	/*****************************************************************************/
		248
		249	inline ev_tstamp
87	ev_time (void)	250	ev_time (void)
88	{	251	{
89	#if HAVE_REALTIME	252	#if EV_USE_REALTIME
90	struct timespec ts;	253	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	254	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	255	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	256	#else
94	struct timeval tv;	257	struct timeval tv;
95	gettimeofday (&tv, 0);	258	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	259	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	260	#endif
98	}	261	}
99		262
100	static ev_tstamp	263	inline ev_tstamp
101	get_clock (void)	264	get_clock (void)
102	{	265	{
103	#if HAVE_MONOTONIC	266	#if EV_USE_MONOTONIC
104	if (have_monotonic)	267	if (expect_true (have_monotonic))
105	{	268	{
106	struct timespec ts;	269	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	270	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	271	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	272	}
110	#endif	273	#endif
111		274
112	return ev_time ();	275	return ev_time ();
113	}	276	}
114		277
		278	#if EV_MULTIPLICITY
		279	ev_tstamp
		280	ev_now (EV_P)
		281	{
		282	return ev_rt_now;
		283	}
		284	#endif
		285
		286	#define array_roundsize(type,n) ((n) | 4 & ~3)
		287
115	#define array_needsize(base,cur,cnt,init) \	288	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	289	if (expect_false ((cnt) > cur)) \
117	{ \	290	{ \
118	int newcnt = cur; \	291	int newcnt = cur; \
119	do \	292	do \
120	{ \	293	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	294	newcnt = array_roundsize (type, newcnt << 1); \
122	} \	295	} \
123	while ((cnt) > newcnt); \	296	while ((cnt) > newcnt); \
124	\	297	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	298	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
126	init (base + cur, newcnt - cur); \	299	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	300	cur = newcnt; \
128	}	301	}
		302
		303	#define array_slim(type,stem) \
		304	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		305	{ \
		306	stem ## max = array_roundsize (stem ## cnt >> 1); \
		307	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		308	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		309	}
		310
		311	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		312	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		313	#define array_free_microshit(stem) \
		314	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		315
		316	#define array_free(stem, idx) \
		317	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
129		318
130	/*****************************************************************************/	319	/*****************************************************************************/
131		320
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	321	static void
145	anfds_init (ANFD *base, int count)	322	anfds_init (ANFD *base, int count)
146	{	323	{
147	while (count--)	324	while (count--)
148	{	325	{
149	base->head = 0;	326	base->head = 0;
150	base->wev = base->rev = EV_NONE;	327	base->events = EV_NONE;
		328	base->reify = 0;
		329
151	++base;	330	++base;
152	}	331	}
153	}	332	}
154		333
155	typedef struct	334	void
		335	ev_feed_event (EV_P_ void *w, int revents)
156	{	336	{
157	W w;	337	W w_ = (W)w;
158	int events;
159	} ANPENDING;
160		338
161	static ANPENDING *pendings;	339	if (w_->pending)
162	static int pendingmax, pendingcnt;
163
164	static void
165	event (W w, int events)
166	{
167	if (w->active)
168	{	340	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	341	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		342	return;
173	}	343	}
174	}
175		344
		345	w_->pending = ++pendingcnt [ABSPRI (w_)];
		346	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
		347	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		348	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		349	}
		350
176	static void	351	static void
		352	queue_events (EV_P_ W *events, int eventcnt, int type)
		353	{
		354	int i;
		355
		356	for (i = 0; i < eventcnt; ++i)
		357	ev_feed_event (EV_A_ events [i], type);
		358	}
		359
		360	inline void
177	fd_event (int fd, int events)	361	fd_event (EV_P_ int fd, int revents)
178	{	362	{
179	ANFD *anfd = anfds + fd;	363	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	364	struct ev_io *w;
181		365
182	for (w = anfd->head; w; w = w->next)	366	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
183	{	367	{
184	int ev = w->events & events;	368	int ev = w->events & revents;
185		369
186	if (ev)	370	if (ev)
187	event ((W)w, ev);	371	ev_feed_event (EV_A_ (W)w, ev);
188	}	372	}
189	}	373	}
190		374
		375	void
		376	ev_feed_fd_event (EV_P_ int fd, int revents)
		377	{
		378	fd_event (EV_A_ fd, revents);
		379	}
		380
		381	/*****************************************************************************/
		382
191	static void	383	static void
192	queue_events (W *events, int eventcnt, int type)	384	fd_reify (EV_P)
193	{	385	{
194	int i;	386	int i;
195		387
196	for (i = 0; i < eventcnt; ++i)	388	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	389	{
		390	int fd = fdchanges [i];
		391	ANFD *anfd = anfds + fd;
		392	struct ev_io *w;
		393
		394	int events = 0;
		395
		396	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		397	events |= w->events;
		398
		399	anfd->reify = 0;
		400
		401	method_modify (EV_A_ fd, anfd->events, events);
		402	anfd->events = events;
		403	}
		404
		405	fdchangecnt = 0;
		406	}
		407
		408	static void
		409	fd_change (EV_P_ int fd)
		410	{
		411	if (anfds [fd].reify)
		412	return;
		413
		414	anfds [fd].reify = 1;
		415
		416	++fdchangecnt;
		417	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		418	fdchanges [fdchangecnt - 1] = fd;
		419	}
		420
		421	static void
		422	fd_kill (EV_P_ int fd)
		423	{
		424	struct ev_io *w;
		425
		426	while ((w = (struct ev_io *)anfds [fd].head))
		427	{
		428	ev_io_stop (EV_A_ w);
		429	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		430	}
		431	}
		432
		433	static int
		434	fd_valid (int fd)
		435	{
		436	#ifdef WIN32
		437	return !!win32_get_osfhandle (fd);
		438	#else
		439	return fcntl (fd, F_GETFD) != -1;
		440	#endif
198	}	441	}
199		442
200	/* called on EBADF to verify fds */	443	/* called on EBADF to verify fds */
201	static void	444	static void
202	fd_recheck (void)	445	fd_ebadf (EV_P)
203	{	446	{
204	int fd;	447	int fd;
205		448
206	for (fd = 0; fd < anfdmax; ++fd)	449	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	450	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	451	if (!fd_valid (fd) == -1 && errno == EBADF)
209	while (anfds [fd].head)	452	fd_kill (EV_A_ fd);
		453	}
		454
		455	/* called on ENOMEM in select/poll to kill some fds and retry */
		456	static void
		457	fd_enomem (EV_P)
		458	{
		459	int fd;
		460
		461	for (fd = anfdmax; fd--; )
		462	if (anfds [fd].events)
210	{	463	{
211	event ((W)anfds [fd].head, EV_ERROR);	464	fd_kill (EV_A_ fd);
212	evio_stop (anfds [fd].head);	465	return;
213	}	466	}
		467	}
		468
		469	/* usually called after fork if method needs to re-arm all fds from scratch */
		470	static void
		471	fd_rearm_all (EV_P)
		472	{
		473	int fd;
		474
		475	/* this should be highly optimised to not do anything but set a flag */
		476	for (fd = 0; fd < anfdmax; ++fd)
		477	if (anfds [fd].events)
		478	{
		479	anfds [fd].events = 0;
		480	fd_change (EV_A_ fd);
		481	}
214	}	482	}
215		483
216	/*****************************************************************************/	484	/*****************************************************************************/
217		485
218	static struct ev_timer **timers;
219	static int timermax, timercnt;
220
221	static struct ev_periodic **periodics;
222	static int periodicmax, periodiccnt;
223
224	static void	486	static void
225	upheap (WT *timers, int k)	487	upheap (WT *heap, int k)
226	{	488	{
227	WT w = timers [k];	489	WT w = heap [k];
228		490
229	while (k && timers [k >> 1]->at > w->at)	491	while (k && heap [k >> 1]->at > w->at)
230	{	492	{
231	timers [k] = timers [k >> 1];	493	heap [k] = heap [k >> 1];
232	timers [k]->active = k + 1;	494	((W)heap [k])->active = k + 1;
233	k >>= 1;	495	k >>= 1;
234	}	496	}
235		497
236	timers [k] = w;	498	heap [k] = w;
237	timers [k]->active = k + 1;	499	((W)heap [k])->active = k + 1;
238		500
239	}	501	}
240		502
241	static void	503	static void
242	downheap (WT *timers, int N, int k)	504	downheap (WT *heap, int N, int k)
243	{	505	{
244	WT w = timers [k];	506	WT w = heap [k];
245		507
246	while (k < (N >> 1))	508	while (k < (N >> 1))
247	{	509	{
248	int j = k << 1;	510	int j = k << 1;
249		511
250	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	512	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
251	++j;	513	++j;
252		514
253	if (w->at <= timers [j]->at)	515	if (w->at <= heap [j]->at)
254	break;	516	break;
255		517
256	timers [k] = timers [j];	518	heap [k] = heap [j];
257	timers [k]->active = k + 1;	519	((W)heap [k])->active = k + 1;
258	k = j;	520	k = j;
259	}	521	}
260		522
261	timers [k] = w;	523	heap [k] = w;
262	timers [k]->active = k + 1;	524	((W)heap [k])->active = k + 1;
		525	}
		526
		527	inline void
		528	adjustheap (WT *heap, int N, int k, ev_tstamp at)
		529	{
		530	ev_tstamp old_at = heap [k]->at;
		531	heap [k]->at = at;
		532
		533	if (old_at < at)
		534	downheap (heap, N, k);
		535	else
		536	upheap (heap, k);
263	}	537	}
264		538
265	/*****************************************************************************/	539	/*****************************************************************************/
266		540
267	typedef struct	541	typedef struct
268	{	542	{
269	struct ev_signal *head;	543	WL head;
270	sig_atomic_t gotsig;	544	sig_atomic_t volatile gotsig;
271	} ANSIG;	545	} ANSIG;
272		546
273	static ANSIG *signals;	547	static ANSIG *signals;
274	static int signalmax;	548	static int signalmax;
275		549
276	static int sigpipe [2];	550	static int sigpipe [2];
277	static sig_atomic_t gotsig;	551	static sig_atomic_t volatile gotsig;
278	static struct ev_io sigev;	552	static struct ev_io sigev;
279		553
280	static void	554	static void
281	signals_init (ANSIG *base, int count)	555	signals_init (ANSIG *base, int count)
282	{	556	{
283	while (count--)	557	while (count--)
284	{	558	{
285	base->head = 0;	559	base->head = 0;
286	base->gotsig = 0;	560	base->gotsig = 0;
		561
287	++base;	562	++base;
288	}	563	}
289	}	564	}
290		565
291	static void	566	static void
292	sighandler (int signum)	567	sighandler (int signum)
293	{	568	{
		569	#if WIN32
		570	signal (signum, sighandler);
		571	#endif
		572
294	signals [signum - 1].gotsig = 1;	573	signals [signum - 1].gotsig = 1;
295		574
296	if (!gotsig)	575	if (!gotsig)
297	{	576	{
		577	int old_errno = errno;
298	gotsig = 1;	578	gotsig = 1;
		579	#ifdef WIN32
		580	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		581	#else
299	write (sigpipe [1], &gotsig, 1);	582	write (sigpipe [1], &signum, 1);
		583	#endif
		584	errno = old_errno;
300	}	585	}
301	}	586	}
302		587
		588	void
		589	ev_feed_signal_event (EV_P_ int signum)
		590	{
		591	WL w;
		592
		593	#if EV_MULTIPLICITY
		594	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		595	#endif
		596
		597	--signum;
		598
		599	if (signum < 0 || signum >= signalmax)
		600	return;
		601
		602	signals [signum].gotsig = 0;
		603
		604	for (w = signals [signum].head; w; w = w->next)
		605	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		606	}
		607
303	static void	608	static void
304	sigcb (struct ev_io *iow, int revents)	609	sigcb (EV_P_ struct ev_io *iow, int revents)
305	{	610	{
306	struct ev_signal *w;
307	int sig;	611	int signum;
308		612
		613	#ifdef WIN32
		614	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		615	#else
		616	read (sigpipe [0], &revents, 1);
		617	#endif
309	gotsig = 0;	618	gotsig = 0;
310	read (sigpipe [0], &revents, 1);
311		619
312	for (sig = signalmax; sig--; )	620	for (signum = signalmax; signum--; )
313	if (signals [sig].gotsig)	621	if (signals [signum].gotsig)
314	{	622	ev_feed_signal_event (EV_A_ signum + 1);
315	signals [sig].gotsig = 0;
316
317	for (w = signals [sig].head; w; w = w->next)
318	event ((W)w, EV_SIGNAL);
319	}
320	}	623	}
321		624
322	static void	625	static void
323	siginit (void)	626	siginit (EV_P)
324	{	627	{
		628	#ifndef WIN32
325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	629	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	630	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327		631
328	/* rather than sort out wether we really need nb, set it */	632	/* rather than sort out wether we really need nb, set it */
329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	633	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	634	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		635	#endif
331		636
332	evio_set (&sigev, sigpipe [0], EV_READ);	637	ev_io_set (&sigev, sigpipe [0], EV_READ);
333	evio_start (&sigev);	638	ev_io_start (EV_A_ &sigev);
		639	ev_unref (EV_A); /* child watcher should not keep loop alive */
334	}	640	}
335		641
336	/*****************************************************************************/	642	/*****************************************************************************/
337		643
338	static struct ev_idle **idles;
339	static int idlemax, idlecnt;
340
341	static struct ev_prepare **prepares;
342	static int preparemax, preparecnt;
343
344	static struct ev_check **checks;
345	static int checkmax, checkcnt;
346
347	/*****************************************************************************/
348
349	static struct ev_child *childs [PID_HASHSIZE];	644	static struct ev_child *childs [PID_HASHSIZE];
		645
		646	#ifndef WIN32
		647
350	static struct ev_signal childev;	648	static struct ev_signal childev;
351		649
352	#ifndef WCONTINUED	650	#ifndef WCONTINUED
353	# define WCONTINUED 0	651	# define WCONTINUED 0
354	#endif	652	#endif
355		653
356	static void	654	static void
357	childcb (struct ev_signal *sw, int revents)	655	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
358	{	656	{
359	struct ev_child *w;	657	struct ev_child *w;
		658
		659	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		660	if (w->pid == pid || !w->pid)
		661	{
		662	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		663	w->rpid = pid;
		664	w->rstatus = status;
		665	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		666	}
		667	}
		668
		669	static void
		670	childcb (EV_P_ struct ev_signal *sw, int revents)
		671	{
360	int pid, status;	672	int pid, status;
361		673
362	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	674	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	675	{
364	if (w->pid == pid || w->pid == -1)	676	/* make sure we are called again until all childs have been reaped */
365	{	677	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
366	w->status = status;	678
367	event ((W)w, EV_CHILD);	679	child_reap (EV_A_ sw, pid, pid, status);
368	}	680	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		681	}
369	}	682	}
		683
		684	#endif
370		685
371	/*****************************************************************************/	686	/*****************************************************************************/
372		687
		688	#if EV_USE_KQUEUE
		689	# include "ev_kqueue.c"
		690	#endif
373	#if HAVE_EPOLL	691	#if EV_USE_EPOLL
374	# include "ev_epoll.c"	692	# include "ev_epoll.c"
375	#endif	693	#endif
		694	#if EV_USE_POLL
		695	# include "ev_poll.c"
		696	#endif
376	#if HAVE_SELECT	697	#if EV_USE_SELECT
377	# include "ev_select.c"	698	# include "ev_select.c"
378	#endif	699	#endif
379		700
380	int	701	int
381	ev_version_major (void)	702	ev_version_major (void)
…		…
387	ev_version_minor (void)	708	ev_version_minor (void)
388	{	709	{
389	return EV_VERSION_MINOR;	710	return EV_VERSION_MINOR;
390	}	711	}
391		712
392	int ev_init (int flags)	713	/* return true if we are running with elevated privileges and should ignore env variables */
		714	static int
		715	enable_secure (void)
393	{	716	{
		717	#ifdef WIN32
		718	return 0;
		719	#else
		720	return getuid () != geteuid ()
		721	|| getgid () != getegid ();
		722	#endif
		723	}
		724
		725	int
		726	ev_method (EV_P)
		727	{
		728	return method;
		729	}
		730
		731	static void
		732	loop_init (EV_P_ int methods)
		733	{
394	if (!ev_method)	734	if (!method)
395	{	735	{
396	#if HAVE_MONOTONIC	736	#if EV_USE_MONOTONIC
397	{	737	{
398	struct timespec ts;	738	struct timespec ts;
399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	739	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400	have_monotonic = 1;	740	have_monotonic = 1;
401	}	741	}
402	#endif	742	#endif
403		743
404	ev_now = ev_time ();	744	ev_rt_now = ev_time ();
405	now = get_clock ();	745	mn_now = get_clock ();
		746	now_floor = mn_now;
406	diff = ev_now - now;	747	rtmn_diff = ev_rt_now - mn_now;
407		748
		749	if (methods == EVMETHOD_AUTO)
		750	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		751	methods = atoi (getenv ("LIBEV_METHODS"));
		752	else
		753	methods = EVMETHOD_ANY;
		754
		755	method = 0;
		756	#if EV_USE_WIN32
		757	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		758	#endif
		759	#if EV_USE_KQUEUE
		760	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		761	#endif
		762	#if EV_USE_EPOLL
		763	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		764	#endif
		765	#if EV_USE_POLL
		766	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		767	#endif
		768	#if EV_USE_SELECT
		769	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		770	#endif
		771
		772	ev_init (&sigev, sigcb);
		773	ev_set_priority (&sigev, EV_MAXPRI);
		774	}
		775	}
		776
		777	void
		778	loop_destroy (EV_P)
		779	{
		780	int i;
		781
		782	#if EV_USE_WIN32
		783	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		784	#endif
		785	#if EV_USE_KQUEUE
		786	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		787	#endif
		788	#if EV_USE_EPOLL
		789	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		790	#endif
		791	#if EV_USE_POLL
		792	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		793	#endif
		794	#if EV_USE_SELECT
		795	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		796	#endif
		797
		798	for (i = NUMPRI; i--; )
		799	array_free (pending, [i]);
		800
		801	/* have to use the microsoft-never-gets-it-right macro */
		802	array_free_microshit (fdchange);
		803	array_free_microshit (timer);
		804	array_free_microshit (periodic);
		805	array_free_microshit (idle);
		806	array_free_microshit (prepare);
		807	array_free_microshit (check);
		808
		809	method = 0;
		810	}
		811
		812	static void
		813	loop_fork (EV_P)
		814	{
		815	#if EV_USE_EPOLL
		816	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		817	#endif
		818	#if EV_USE_KQUEUE
		819	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		820	#endif
		821
		822	if (ev_is_active (&sigev))
		823	{
		824	/* default loop */
		825
		826	ev_ref (EV_A);
		827	ev_io_stop (EV_A_ &sigev);
		828	close (sigpipe [0]);
		829	close (sigpipe [1]);
		830
		831	while (pipe (sigpipe))
		832	syserr ("(libev) error creating pipe");
		833
		834	siginit (EV_A);
		835	}
		836
		837	postfork = 0;
		838	}
		839
		840	#if EV_MULTIPLICITY
		841	struct ev_loop *
		842	ev_loop_new (int methods)
		843	{
		844	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		845
		846	memset (loop, 0, sizeof (struct ev_loop));
		847
		848	loop_init (EV_A_ methods);
		849
		850	if (ev_method (EV_A))
		851	return loop;
		852
		853	return 0;
		854	}
		855
		856	void
		857	ev_loop_destroy (EV_P)
		858	{
		859	loop_destroy (EV_A);
		860	ev_free (loop);
		861	}
		862
		863	void
		864	ev_loop_fork (EV_P)
		865	{
		866	postfork = 1;
		867	}
		868
		869	#endif
		870
		871	#if EV_MULTIPLICITY
		872	struct ev_loop *
		873	#else
		874	int
		875	#endif
		876	ev_default_loop (int methods)
		877	{
		878	if (sigpipe [0] == sigpipe [1])
408	if (pipe (sigpipe))	879	if (pipe (sigpipe))
409	return 0;	880	return 0;
410		881
411	ev_method = EVMETHOD_NONE;	882	if (!default_loop)
412	#if HAVE_EPOLL	883	{
413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	884	#if EV_MULTIPLICITY
		885	struct ev_loop *loop = default_loop = &default_loop_struct;
		886	#else
		887	default_loop = 1;
414	#endif	888	#endif
415	#if HAVE_SELECT
416	if (ev_method == EVMETHOD_NONE) select_init (flags);
417	#endif
418		889
		890	loop_init (EV_A_ methods);
		891
419	if (ev_method)	892	if (ev_method (EV_A))
420	{	893	{
421	evw_init (&sigev, sigcb);
422	siginit ();	894	siginit (EV_A);
423		895
		896	#ifndef WIN32
424	evsignal_init (&childev, childcb, SIGCHLD);	897	ev_signal_init (&childev, childcb, SIGCHLD);
		898	ev_set_priority (&childev, EV_MAXPRI);
425	evsignal_start (&childev);	899	ev_signal_start (EV_A_ &childev);
		900	ev_unref (EV_A); /* child watcher should not keep loop alive */
		901	#endif
426	}	902	}
		903	else
		904	default_loop = 0;
427	}	905	}
428		906
429	return ev_method;	907	return default_loop;
		908	}
		909
		910	void
		911	ev_default_destroy (void)
		912	{
		913	#if EV_MULTIPLICITY
		914	struct ev_loop *loop = default_loop;
		915	#endif
		916
		917	#ifndef WIN32
		918	ev_ref (EV_A); /* child watcher */
		919	ev_signal_stop (EV_A_ &childev);
		920	#endif
		921
		922	ev_ref (EV_A); /* signal watcher */
		923	ev_io_stop (EV_A_ &sigev);
		924
		925	close (sigpipe [0]); sigpipe [0] = 0;
		926	close (sigpipe [1]); sigpipe [1] = 0;
		927
		928	loop_destroy (EV_A);
		929	}
		930
		931	void
		932	ev_default_fork (void)
		933	{
		934	#if EV_MULTIPLICITY
		935	struct ev_loop *loop = default_loop;
		936	#endif
		937
		938	if (method)
		939	postfork = 1;
430	}	940	}
431		941
432	/*****************************************************************************/	942	/*****************************************************************************/
433		943
434	void
435	ev_prefork (void)
436	{
437	/* nop */
438	}
439
440	void
441	ev_postfork_parent (void)
442	{
443	/* nop */
444	}
445
446	void
447	ev_postfork_child (void)
448	{
449	#if HAVE_EPOLL
450	if (ev_method == EVMETHOD_EPOLL)
451	epoll_postfork_child ();
452	#endif
453
454	evio_stop (&sigev);
455	close (sigpipe [0]);
456	close (sigpipe [1]);
457	pipe (sigpipe);
458	siginit ();
459	}
460
461	/*****************************************************************************/
462
463	static void	944	static int
464	fd_reify (void)	945	any_pending (EV_P)
465	{	946	{
466	int i;	947	int pri;
467		948
468	for (i = 0; i < fdchangecnt; ++i)	949	for (pri = NUMPRI; pri--; )
469	{	950	if (pendingcnt [pri])
470	int fd = fdchanges [i];	951	return 1;
471	ANFD *anfd = anfds + fd;
472	struct ev_io *w;
473		952
474	int wev = 0;	953	return 0;
		954	}
475		955
476	for (w = anfd->head; w; w = w->next)	956	static void
477	wev |= w->events;	957	call_pending (EV_P)
		958	{
		959	int pri;
478		960
479	if (anfd->wev != wev)	961	for (pri = NUMPRI; pri--; )
		962	while (pendingcnt [pri])
480	{	963	{
481	method_modify (fd, anfd->wev, wev);
482	anfd->wev = wev;
483	}
484	}
485
486	fdchangecnt = 0;
487	}
488
489	static void
490	call_pending (void)
491	{
492	while (pendingcnt)
493	{
494	ANPENDING *p = pendings + --pendingcnt;	964	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
495		965
496	if (p->w)	966	if (p->w)
497	{	967	{
498	p->w->pending = 0;	968	p->w->pending = 0;
499	p->w->cb (p->w, p->events);	969	EV_CB_INVOKE (p->w, p->events);
500	}	970	}
501	}	971	}
502	}	972	}
503		973
504	static void	974	static void
505	timers_reify (void)	975	timers_reify (EV_P)
506	{	976	{
507	while (timercnt && timers [0]->at <= now)	977	while (timercnt && ((WT)timers [0])->at <= mn_now)
508	{	978	{
509	struct ev_timer *w = timers [0];	979	struct ev_timer *w = timers [0];
510		980
511	event ((W)w, EV_TIMEOUT);	981	assert (("inactive timer on timer heap detected", ev_is_active (w)));
512		982
513	/* first reschedule or stop timer */	983	/* first reschedule or stop timer */
514	if (w->repeat)	984	if (w->repeat)
515	{	985	{
		986	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
516	w->at = now + w->repeat;	987	((WT)w)->at = mn_now + w->repeat;
517	assert (("timer timeout in the past, negative repeat?", w->at > now));
518	downheap ((WT *)timers, timercnt, 0);	988	downheap ((WT *)timers, timercnt, 0);
519	}	989	}
520	else	990	else
521	evtimer_stop (w); /* nonrepeating: stop timer */	991	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522	}
523	}
524		992
		993	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		994	}
		995	}
		996
525	static void	997	static void
526	periodics_reify (void)	998	periodics_reify (EV_P)
527	{	999	{
528	while (periodiccnt && periodics [0]->at <= ev_now)	1000	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
529	{	1001	{
530	struct ev_periodic *w = periodics [0];	1002	struct ev_periodic *w = periodics [0];
531		1003
		1004	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1005
532	/* first reschedule or stop timer */	1006	/* first reschedule or stop timer */
533	if (w->interval)	1007	if (w->reschedule_cb)
534	{	1008	{
		1009	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1010
		1011	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1012	downheap ((WT *)periodics, periodiccnt, 0);
		1013	}
		1014	else if (w->interval)
		1015	{
535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1016	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1017	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
537	downheap ((WT *)periodics, periodiccnt, 0);	1018	downheap ((WT *)periodics, periodiccnt, 0);
538	}	1019	}
539	else	1020	else
540	evperiodic_stop (w); /* nonrepeating: stop timer */	1021	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541		1022
542	event ((W)w, EV_TIMEOUT);	1023	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
543	}	1024	}
544	}	1025	}
545		1026
546	static void	1027	static void
547	periodics_reschedule (ev_tstamp diff)	1028	periodics_reschedule (EV_P)
548	{	1029	{
549	int i;	1030	int i;
550		1031
551	/* adjust periodics after time jump */	1032	/* adjust periodics after time jump */
552	for (i = 0; i < periodiccnt; ++i)	1033	for (i = 0; i < periodiccnt; ++i)
553	{	1034	{
554	struct ev_periodic *w = periodics [i];	1035	struct ev_periodic *w = periodics [i];
555		1036
		1037	if (w->reschedule_cb)
		1038	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
556	if (w->interval)	1039	else if (w->interval)
		1040	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1041	}
		1042
		1043	/* now rebuild the heap */
		1044	for (i = periodiccnt >> 1; i--; )
		1045	downheap ((WT *)periodics, periodiccnt, i);
		1046	}
		1047
		1048	inline int
		1049	time_update_monotonic (EV_P)
		1050	{
		1051	mn_now = get_clock ();
		1052
		1053	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1054	{
		1055	ev_rt_now = rtmn_diff + mn_now;
		1056	return 0;
		1057	}
		1058	else
		1059	{
		1060	now_floor = mn_now;
		1061	ev_rt_now = ev_time ();
		1062	return 1;
		1063	}
		1064	}
		1065
		1066	static void
		1067	time_update (EV_P)
		1068	{
		1069	int i;
		1070
		1071	#if EV_USE_MONOTONIC
		1072	if (expect_true (have_monotonic))
		1073	{
		1074	if (time_update_monotonic (EV_A))
557	{	1075	{
558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1076	ev_tstamp odiff = rtmn_diff;
559		1077
560	if (fabs (diff) >= 1e-4)	1078	for (i = 4; --i; ) /* loop a few times, before making important decisions */
561	{	1079	{
562	evperiodic_stop (w);	1080	rtmn_diff = ev_rt_now - mn_now;
563	evperiodic_start (w);
564		1081
565	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1082	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1083	return; /* all is well */
		1084
		1085	ev_rt_now = ev_time ();
		1086	mn_now = get_clock ();
		1087	now_floor = mn_now;
566	}	1088	}
		1089
		1090	periodics_reschedule (EV_A);
		1091	/* no timer adjustment, as the monotonic clock doesn't jump */
		1092	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
567	}	1093	}
568	}	1094	}
569	}	1095	else
570		1096	#endif
571	static void	1097	{
572	time_update (void)
573	{
574	int i;
575
576	ev_now = ev_time ();	1098	ev_rt_now = ev_time ();
577		1099
578	if (have_monotonic)	1100	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
579	{
580	ev_tstamp odiff = diff;
581
582	for (i = 4; --i; ) /* loop a few times, before making important decisions */
583	{	1101	{
584	now = get_clock ();
585	diff = ev_now - now;
586
587	if (fabs (odiff - diff) < MIN_TIMEJUMP)
588	return; /* all is well */
589
590	ev_now = ev_time ();
591	}
592
593	periodics_reschedule (diff - odiff);
594	/* no timer adjustment, as the monotonic clock doesn't jump */
595	}
596	else
597	{
598	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
599	{
600	periodics_reschedule (ev_now - now);	1102	periodics_reschedule (EV_A);
601		1103
602	/* adjust timers. this is easy, as the offset is the same for all */	1104	/* adjust timers. this is easy, as the offset is the same for all */
603	for (i = 0; i < timercnt; ++i)	1105	for (i = 0; i < timercnt; ++i)
604	timers [i]->at += diff;	1106	((WT)timers [i])->at += ev_rt_now - mn_now;
605	}	1107	}
606		1108
607	now = ev_now;	1109	mn_now = ev_rt_now;
608	}	1110	}
609	}	1111	}
610		1112
611	int ev_loop_done;	1113	void
		1114	ev_ref (EV_P)
		1115	{
		1116	++activecnt;
		1117	}
612		1118
		1119	void
		1120	ev_unref (EV_P)
		1121	{
		1122	--activecnt;
		1123	}
		1124
		1125	static int loop_done;
		1126
		1127	void
613	void ev_loop (int flags)	1128	ev_loop (EV_P_ int flags)
614	{	1129	{
615	double block;	1130	double block;
616	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1131	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
617		1132
618	do	1133	do
619	{	1134	{
620	/* queue check watchers (and execute them) */	1135	/* queue check watchers (and execute them) */
621	if (preparecnt)	1136	if (expect_false (preparecnt))
622	{	1137	{
623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1138	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624	call_pending ();	1139	call_pending (EV_A);
625	}	1140	}
626		1141
		1142	/* we might have forked, so reify kernel state if necessary */
		1143	if (expect_false (postfork))
		1144	loop_fork (EV_A);
		1145
627	/* update fd-related kernel structures */	1146	/* update fd-related kernel structures */
628	fd_reify ();	1147	fd_reify (EV_A);
629		1148
630	/* calculate blocking time */	1149	/* calculate blocking time */
631		1150
632	/* we only need this for !monotonic clockor timers, but as we basically	1151	/* we only need this for !monotonic clock or timers, but as we basically
633	always have timers, we just calculate it always */	1152	always have timers, we just calculate it always */
		1153	#if EV_USE_MONOTONIC
		1154	if (expect_true (have_monotonic))
		1155	time_update_monotonic (EV_A);
		1156	else
		1157	#endif
		1158	{
634	ev_now = ev_time ();	1159	ev_rt_now = ev_time ();
		1160	mn_now = ev_rt_now;
		1161	}
635		1162
636	if (flags & EVLOOP_NONBLOCK || idlecnt)	1163	if (flags & EVLOOP_NONBLOCK || idlecnt)
637	block = 0.;	1164	block = 0.;
638	else	1165	else
639	{	1166	{
640	block = MAX_BLOCKTIME;	1167	block = MAX_BLOCKTIME;
641		1168
642	if (timercnt)	1169	if (timercnt)
643	{	1170	{
644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1171	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
645	if (block > to) block = to;	1172	if (block > to) block = to;
646	}	1173	}
647		1174
648	if (periodiccnt)	1175	if (periodiccnt)
649	{	1176	{
650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1177	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
651	if (block > to) block = to;	1178	if (block > to) block = to;
652	}	1179	}
653		1180
654	if (block < 0.) block = 0.;	1181	if (block < 0.) block = 0.;
655	}	1182	}
656		1183
657	method_poll (block);	1184	method_poll (EV_A_ block);
658		1185
659	/* update ev_now, do magic */	1186	/* update ev_rt_now, do magic */
660	time_update ();	1187	time_update (EV_A);
661		1188
662	/* queue pending timers and reschedule them */	1189	/* queue pending timers and reschedule them */
663	timers_reify (); /* relative timers called last */	1190	timers_reify (EV_A); /* relative timers called last */
664	periodics_reify (); /* absolute timers called first */	1191	periodics_reify (EV_A); /* absolute timers called first */
665		1192
666	/* queue idle watchers unless io or timers are pending */	1193	/* queue idle watchers unless io or timers are pending */
667	if (!pendingcnt)	1194	if (idlecnt && !any_pending (EV_A))
668	queue_events ((W *)idles, idlecnt, EV_IDLE);	1195	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
669		1196
670	/* queue check watchers, to be executed first */	1197	/* queue check watchers, to be executed first */
671	if (checkcnt)	1198	if (checkcnt)
672	queue_events ((W *)checks, checkcnt, EV_CHECK);	1199	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673		1200
674	call_pending ();	1201	call_pending (EV_A);
675	}	1202	}
676	while (!ev_loop_done);	1203	while (activecnt && !loop_done);
677		1204
678	if (ev_loop_done != 2)	1205	if (loop_done != 2)
679	ev_loop_done = 0;	1206	loop_done = 0;
		1207	}
		1208
		1209	void
		1210	ev_unloop (EV_P_ int how)
		1211	{
		1212	loop_done = how;
680	}	1213	}
681		1214
682	/*****************************************************************************/	1215	/*****************************************************************************/
683		1216
684	static void	1217	inline void
685	wlist_add (WL *head, WL elem)	1218	wlist_add (WL *head, WL elem)
686	{	1219	{
687	elem->next = *head;	1220	elem->next = *head;
688	*head = elem;	1221	*head = elem;
689	}	1222	}
690		1223
691	static void	1224	inline void
692	wlist_del (WL *head, WL elem)	1225	wlist_del (WL *head, WL elem)
693	{	1226	{
694	while (*head)	1227	while (*head)
695	{	1228	{
696	if (*head == elem)	1229	if (*head == elem)
…		…
701		1234
702	head = &(*head)->next;	1235	head = &(*head)->next;
703	}	1236	}
704	}	1237	}
705		1238
706	static void	1239	inline void
707	ev_clear (W w)	1240	ev_clear_pending (EV_P_ W w)
708	{	1241	{
709	if (w->pending)	1242	if (w->pending)
710	{	1243	{
711	pendings [w->pending - 1].w = 0;	1244	pendings [ABSPRI (w)][w->pending - 1].w = 0;
712	w->pending = 0;	1245	w->pending = 0;
713	}	1246	}
714	}	1247	}
715		1248
716	static void	1249	inline void
717	ev_start (W w, int active)	1250	ev_start (EV_P_ W w, int active)
718	{	1251	{
		1252	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1253	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1254
719	w->active = active;	1255	w->active = active;
		1256	ev_ref (EV_A);
720	}	1257	}
721		1258
722	static void	1259	inline void
723	ev_stop (W w)	1260	ev_stop (EV_P_ W w)
724	{	1261	{
		1262	ev_unref (EV_A);
725	w->active = 0;	1263	w->active = 0;
726	}	1264	}
727		1265
728	/*****************************************************************************/	1266	/*****************************************************************************/
729		1267
730	void	1268	void
731	evio_start (struct ev_io *w)	1269	ev_io_start (EV_P_ struct ev_io *w)
732	{	1270	{
		1271	int fd = w->fd;
		1272
733	if (ev_is_active (w))	1273	if (ev_is_active (w))
734	return;	1274	return;
735		1275
736	int fd = w->fd;	1276	assert (("ev_io_start called with negative fd", fd >= 0));
737		1277
738	ev_start ((W)w, 1);	1278	ev_start (EV_A_ (W)w, 1);
739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1279	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
740	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1280	wlist_add ((WL *)&anfds[fd].head, (WL)w);
741		1281
742	++fdchangecnt;	1282	fd_change (EV_A_ fd);
743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
744	fdchanges [fdchangecnt - 1] = fd;
745
746	if (w->fd == 9)
747	printf ("start %p:%x\n", w, w->events);//D
748	}	1283	}
749		1284
750	void	1285	void
751	evio_stop (struct ev_io *w)	1286	ev_io_stop (EV_P_ struct ev_io *w)
752	{	1287	{
753	if (w->fd == 9)	1288	ev_clear_pending (EV_A_ (W)w);
754	printf ("stop %p:%x\n", w, w->events);//D
755	ev_clear ((W)w);
756	if (!ev_is_active (w))	1289	if (!ev_is_active (w))
757	return;	1290	return;
758		1291
759	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1292	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
760	ev_stop ((W)w);	1293	ev_stop (EV_A_ (W)w);
761		1294
762	++fdchangecnt;	1295	fd_change (EV_A_ w->fd);
763	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
764	fdchanges [fdchangecnt - 1] = w->fd;
765	}	1296	}
766		1297
767	void	1298	void
768	evtimer_start (struct ev_timer *w)	1299	ev_timer_start (EV_P_ struct ev_timer *w)
769	{	1300	{
770	if (ev_is_active (w))	1301	if (ev_is_active (w))
771	return;	1302	return;
772		1303
773	w->at += now;	1304	((WT)w)->at += mn_now;
774		1305
775	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1306	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
776		1307
777	ev_start ((W)w, ++timercnt);	1308	ev_start (EV_A_ (W)w, ++timercnt);
778	array_needsize (timers, timermax, timercnt, );	1309	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
779	timers [timercnt - 1] = w;	1310	timers [timercnt - 1] = w;
780	upheap ((WT *)timers, timercnt - 1);	1311	upheap ((WT *)timers, timercnt - 1);
781	}
782		1312
		1313	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1314	}
		1315
783	void	1316	void
784	evtimer_stop (struct ev_timer *w)	1317	ev_timer_stop (EV_P_ struct ev_timer *w)
785	{	1318	{
786	ev_clear ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
787	if (!ev_is_active (w))	1320	if (!ev_is_active (w))
788	return;	1321	return;
789		1322
		1323	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1324
790	if (w->active < timercnt--)	1325	if (((W)w)->active < timercnt--)
791	{	1326	{
792	timers [w->active - 1] = timers [timercnt];	1327	timers [((W)w)->active - 1] = timers [timercnt];
793	downheap ((WT *)timers, timercnt, w->active - 1);	1328	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
794	}	1329	}
795		1330
796	w->at = w->repeat;	1331	((WT)w)->at = w->repeat;
797		1332
798	ev_stop ((W)w);	1333	ev_stop (EV_A_ (W)w);
799	}	1334	}
800		1335
801	void	1336	void
802	evtimer_again (struct ev_timer *w)	1337	ev_timer_again (EV_P_ struct ev_timer *w)
803	{	1338	{
804	if (ev_is_active (w))	1339	if (ev_is_active (w))
805	{	1340	{
806	if (w->repeat)	1341	if (w->repeat)
807	{
808	w->at = now + w->repeat;
809	downheap ((WT *)timers, timercnt, w->active - 1);	1342	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
810	}
811	else	1343	else
812	evtimer_stop (w);	1344	ev_timer_stop (EV_A_ w);
813	}	1345	}
814	else if (w->repeat)	1346	else if (w->repeat)
815	evtimer_start (w);	1347	ev_timer_start (EV_A_ w);
816	}	1348	}
817		1349
818	void	1350	void
819	evperiodic_start (struct ev_periodic *w)	1351	ev_periodic_start (EV_P_ struct ev_periodic *w)
820	{	1352	{
821	if (ev_is_active (w))	1353	if (ev_is_active (w))
822	return;	1354	return;
823		1355
824	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1356	if (w->reschedule_cb)
825		1357	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1358	else if (w->interval)
		1359	{
		1360	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
826	/* this formula differs from the one in periodic_reify because we do not always round up */	1361	/* this formula differs from the one in periodic_reify because we do not always round up */
827	if (w->interval)
828	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1362	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1363	}
829		1364
830	ev_start ((W)w, ++periodiccnt);	1365	ev_start (EV_A_ (W)w, ++periodiccnt);
831	array_needsize (periodics, periodicmax, periodiccnt, );	1366	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
832	periodics [periodiccnt - 1] = w;	1367	periodics [periodiccnt - 1] = w;
833	upheap ((WT *)periodics, periodiccnt - 1);	1368	upheap ((WT *)periodics, periodiccnt - 1);
834	}
835		1369
		1370	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1371	}
		1372
836	void	1373	void
837	evperiodic_stop (struct ev_periodic *w)	1374	ev_periodic_stop (EV_P_ struct ev_periodic *w)
838	{	1375	{
839	ev_clear ((W)w);	1376	ev_clear_pending (EV_A_ (W)w);
840	if (!ev_is_active (w))	1377	if (!ev_is_active (w))
841	return;	1378	return;
842		1379
		1380	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1381
843	if (w->active < periodiccnt--)	1382	if (((W)w)->active < periodiccnt--)
844	{	1383	{
845	periodics [w->active - 1] = periodics [periodiccnt];	1384	periodics [((W)w)->active - 1] = periodics [periodiccnt];
846	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1385	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
847	}	1386	}
848		1387
849	ev_stop ((W)w);	1388	ev_stop (EV_A_ (W)w);
850	}	1389	}
851		1390
852	void	1391	void
853	evsignal_start (struct ev_signal *w)	1392	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1393	{
		1394	/* TODO: use adjustheap and recalculation */
		1395	ev_periodic_stop (EV_A_ w);
		1396	ev_periodic_start (EV_A_ w);
		1397	}
		1398
		1399	void
		1400	ev_idle_start (EV_P_ struct ev_idle *w)
854	{	1401	{
855	if (ev_is_active (w))	1402	if (ev_is_active (w))
856	return;	1403	return;
857		1404
		1405	ev_start (EV_A_ (W)w, ++idlecnt);
		1406	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1407	idles [idlecnt - 1] = w;
		1408	}
		1409
		1410	void
		1411	ev_idle_stop (EV_P_ struct ev_idle *w)
		1412	{
		1413	ev_clear_pending (EV_A_ (W)w);
		1414	if (ev_is_active (w))
		1415	return;
		1416
		1417	idles [((W)w)->active - 1] = idles [--idlecnt];
		1418	ev_stop (EV_A_ (W)w);
		1419	}
		1420
		1421	void
		1422	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1423	{
		1424	if (ev_is_active (w))
		1425	return;
		1426
		1427	ev_start (EV_A_ (W)w, ++preparecnt);
		1428	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1429	prepares [preparecnt - 1] = w;
		1430	}
		1431
		1432	void
		1433	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1434	{
		1435	ev_clear_pending (EV_A_ (W)w);
		1436	if (ev_is_active (w))
		1437	return;
		1438
		1439	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1440	ev_stop (EV_A_ (W)w);
		1441	}
		1442
		1443	void
		1444	ev_check_start (EV_P_ struct ev_check *w)
		1445	{
		1446	if (ev_is_active (w))
		1447	return;
		1448
		1449	ev_start (EV_A_ (W)w, ++checkcnt);
		1450	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1451	checks [checkcnt - 1] = w;
		1452	}
		1453
		1454	void
		1455	ev_check_stop (EV_P_ struct ev_check *w)
		1456	{
		1457	ev_clear_pending (EV_A_ (W)w);
		1458	if (ev_is_active (w))
		1459	return;
		1460
		1461	checks [((W)w)->active - 1] = checks [--checkcnt];
		1462	ev_stop (EV_A_ (W)w);
		1463	}
		1464
		1465	#ifndef SA_RESTART
		1466	# define SA_RESTART 0
		1467	#endif
		1468
		1469	void
		1470	ev_signal_start (EV_P_ struct ev_signal *w)
		1471	{
		1472	#if EV_MULTIPLICITY
		1473	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1474	#endif
		1475	if (ev_is_active (w))
		1476	return;
		1477
		1478	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1479
858	ev_start ((W)w, 1);	1480	ev_start (EV_A_ (W)w, 1);
859	array_needsize (signals, signalmax, w->signum, signals_init);	1481	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
860	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1482	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
861		1483
862	if (!w->next)	1484	if (!((WL)w)->next)
863	{	1485	{
		1486	#if WIN32
		1487	signal (w->signum, sighandler);
		1488	#else
864	struct sigaction sa;	1489	struct sigaction sa;
865	sa.sa_handler = sighandler;	1490	sa.sa_handler = sighandler;
866	sigfillset (&sa.sa_mask);	1491	sigfillset (&sa.sa_mask);
867	sa.sa_flags = 0;	1492	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
868	sigaction (w->signum, &sa, 0);	1493	sigaction (w->signum, &sa, 0);
		1494	#endif
869	}	1495	}
870	}	1496	}
871		1497
872	void	1498	void
873	evsignal_stop (struct ev_signal *w)	1499	ev_signal_stop (EV_P_ struct ev_signal *w)
874	{	1500	{
875	ev_clear ((W)w);	1501	ev_clear_pending (EV_A_ (W)w);
876	if (!ev_is_active (w))	1502	if (!ev_is_active (w))
877	return;	1503	return;
878		1504
879	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1505	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
880	ev_stop ((W)w);	1506	ev_stop (EV_A_ (W)w);
881		1507
882	if (!signals [w->signum - 1].head)	1508	if (!signals [w->signum - 1].head)
883	signal (w->signum, SIG_DFL);	1509	signal (w->signum, SIG_DFL);
884	}	1510	}
885		1511
886	void evidle_start (struct ev_idle *w)	1512	void
		1513	ev_child_start (EV_P_ struct ev_child *w)
887	{	1514	{
		1515	#if EV_MULTIPLICITY
		1516	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1517	#endif
888	if (ev_is_active (w))	1518	if (ev_is_active (w))
889	return;	1519	return;
890		1520
891	ev_start ((W)w, ++idlecnt);	1521	ev_start (EV_A_ (W)w, 1);
892	array_needsize (idles, idlemax, idlecnt, );	1522	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
893	idles [idlecnt - 1] = w;
894	}	1523	}
895		1524
896	void evidle_stop (struct ev_idle *w)	1525	void
		1526	ev_child_stop (EV_P_ struct ev_child *w)
897	{	1527	{
898	ev_clear ((W)w);	1528	ev_clear_pending (EV_A_ (W)w);
899	if (ev_is_active (w))	1529	if (ev_is_active (w))
900	return;	1530	return;
901		1531
902	idles [w->active - 1] = idles [--idlecnt];
903	ev_stop ((W)w);
904	}
905
906	void evprepare_start (struct ev_prepare *w)
907	{
908	if (ev_is_active (w))
909	return;
910
911	ev_start ((W)w, ++preparecnt);
912	array_needsize (prepares, preparemax, preparecnt, );
913	prepares [preparecnt - 1] = w;
914	}
915
916	void evprepare_stop (struct ev_prepare *w)
917	{
918	ev_clear ((W)w);
919	if (ev_is_active (w))
920	return;
921
922	prepares [w->active - 1] = prepares [--preparecnt];
923	ev_stop ((W)w);
924	}
925
926	void evcheck_start (struct ev_check *w)
927	{
928	if (ev_is_active (w))
929	return;
930
931	ev_start ((W)w, ++checkcnt);
932	array_needsize (checks, checkmax, checkcnt, );
933	checks [checkcnt - 1] = w;
934	}
935
936	void evcheck_stop (struct ev_check *w)
937	{
938	ev_clear ((W)w);
939	if (ev_is_active (w))
940	return;
941
942	checks [w->active - 1] = checks [--checkcnt];
943	ev_stop ((W)w);
944	}
945
946	void evchild_start (struct ev_child *w)
947	{
948	if (ev_is_active (w))
949	return;
950
951	ev_start ((W)w, 1);
952	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
953	}
954
955	void evchild_stop (struct ev_child *w)
956	{
957	ev_clear ((W)w);
958	if (ev_is_active (w))
959	return;
960
961	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1532	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
962	ev_stop ((W)w);	1533	ev_stop (EV_A_ (W)w);
963	}	1534	}
964		1535
965	/*****************************************************************************/	1536	/*****************************************************************************/
966		1537
967	struct ev_once	1538	struct ev_once
…		…
971	void (*cb)(int revents, void *arg);	1542	void (*cb)(int revents, void *arg);
972	void *arg;	1543	void *arg;
973	};	1544	};
974		1545
975	static void	1546	static void
976	once_cb (struct ev_once *once, int revents)	1547	once_cb (EV_P_ struct ev_once *once, int revents)
977	{	1548	{
978	void (*cb)(int revents, void *arg) = once->cb;	1549	void (*cb)(int revents, void *arg) = once->cb;
979	void *arg = once->arg;	1550	void *arg = once->arg;
980		1551
981	evio_stop (&once->io);	1552	ev_io_stop (EV_A_ &once->io);
982	evtimer_stop (&once->to);	1553	ev_timer_stop (EV_A_ &once->to);
983	free (once);	1554	ev_free (once);
984		1555
985	cb (revents, arg);	1556	cb (revents, arg);
986	}	1557	}
987		1558
988	static void	1559	static void
989	once_cb_io (struct ev_io *w, int revents)	1560	once_cb_io (EV_P_ struct ev_io *w, int revents)
990	{	1561	{
991	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1562	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
992	}	1563	}
993		1564
994	static void	1565	static void
995	once_cb_to (struct ev_timer *w, int revents)	1566	once_cb_to (EV_P_ struct ev_timer *w, int revents)
996	{	1567	{
997	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1568	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
998	}	1569	}
999		1570
1000	void	1571	void
1001	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1572	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1002	{	1573	{
1003	struct ev_once *once = malloc (sizeof (struct ev_once));	1574	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1004		1575
1005	if (!once)	1576	if (!once)
1006	cb (EV_ERROR, arg);	1577	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1007	else	1578	else
1008	{	1579	{
1009	once->cb = cb;	1580	once->cb = cb;
1010	once->arg = arg;	1581	once->arg = arg;
1011		1582
1012	evw_init (&once->io, once_cb_io);	1583	ev_init (&once->io, once_cb_io);
1013
1014	if (fd >= 0)	1584	if (fd >= 0)
1015	{	1585	{
1016	evio_set (&once->io, fd, events);	1586	ev_io_set (&once->io, fd, events);
1017	evio_start (&once->io);	1587	ev_io_start (EV_A_ &once->io);
1018	}	1588	}
1019		1589
1020	evw_init (&once->to, once_cb_to);	1590	ev_init (&once->to, once_cb_to);
1021
1022	if (timeout >= 0.)	1591	if (timeout >= 0.)
1023	{	1592	{
1024	evtimer_set (&once->to, timeout, 0.);	1593	ev_timer_set (&once->to, timeout, 0.);
1025	evtimer_start (&once->to);	1594	ev_timer_start (EV_A_ &once->to);
1026	}	1595	}
1027	}	1596	}
1028	}	1597	}
1029		1598
1030	/*****************************************************************************/
1031
1032	#if 0
1033
1034	struct ev_io wio;
1035
1036	static void
1037	sin_cb (struct ev_io *w, int revents)
1038	{
1039	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1040	}
1041
1042	static void
1043	ocb (struct ev_timer *w, int revents)
1044	{
1045	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1046	evtimer_stop (w);
1047	evtimer_start (w);
1048	}
1049
1050	static void
1051	scb (struct ev_signal *w, int revents)
1052	{
1053	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1054	evio_stop (&wio);
1055	evio_start (&wio);
1056	}
1057
1058	static void
1059	gcb (struct ev_signal *w, int revents)
1060	{
1061	fprintf (stderr, "generic %x\n", revents);
1062
1063	}
1064
1065	int main (void)
1066	{
1067	ev_init (0);
1068
1069	evio_init (&wio, sin_cb, 0, EV_READ);
1070	evio_start (&wio);
1071
1072	struct ev_timer t[10000];
1073
1074	#if 0
1075	int i;
1076	for (i = 0; i < 10000; ++i)
1077	{
1078	struct ev_timer *w = t + i;
1079	evw_init (w, ocb, i);
1080	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1081	evtimer_start (w);
1082	if (drand48 () < 0.5)
1083	evtimer_stop (w);
1084	}
1085	#endif
1086
1087	struct ev_timer t1;
1088	evtimer_init (&t1, ocb, 5, 10);
1089	evtimer_start (&t1);
1090
1091	struct ev_signal sig;
1092	evsignal_init (&sig, scb, SIGQUIT);
1093	evsignal_start (&sig);
1094
1095	struct ev_check cw;
1096	evcheck_init (&cw, gcb);
1097	evcheck_start (&cw);
1098
1099	struct ev_idle iw;
1100	evidle_init (&iw, gcb);
1101	evidle_start (&iw);
1102
1103	ev_loop (0);
1104
1105	return 0;
1106	}
1107
1108	#endif
1109
1110
1111
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