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Comparing libev/ev.c (file contents):
Revision 1.29 by root, Thu Nov 1 08:10:03 2007 UTC vs.
Revision 1.85 by root, Sat Nov 10 03:13:50 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	*/
29	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
30	# include "config.h"	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
31	#endif	55	#endif
32		56
33	#include <math.h>	57	#include <math.h>
34	#include <stdlib.h>	58	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	59	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	60	#include <stddef.h>
39		61
40	#include <stdio.h>	62	#include <stdio.h>
41		63
42	#include <assert.h>	64	#include <assert.h>
43	#include <errno.h>	65	#include <errno.h>
44	#include <sys/types.h>	66	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	67	#include <time.h>
48		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
49	#ifndef EV_USE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	80	#endif
54		81
55	#ifndef EV_USE_SELECT	82	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	83	# define EV_USE_SELECT 1
57	#endif	84	#endif
58		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
59	#ifndef EV_USE_EPOLL	90	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	91	# define EV_USE_EPOLL 0
61	#endif	92	#endif
62		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
		105	# endif
		106	#endif
		107
63	#ifndef EV_USE_REALTIME	108	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
65	#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	/**/
66		125
67	#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) */
68	#define MAX_BLOCKTIME 59.731	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69	#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 */
70		130
		131	#ifdef EV_H
		132	# include EV_H
		133	#else
71	#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)
72		150
73	typedef struct ev_watcher *W;	151	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	152	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	153	typedef struct ev_watcher_time *WT;
76		154
77	static ev_tstamp now, diff; /* monotonic clock */	155	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
78	ev_tstamp ev_now;
79	int ev_method;
80		156
81	static int have_monotonic; /* runtime */	157	#include "ev_win32.c"
82
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
84	static void (*method_modify)(int fd, int oev, int nev);
85	static void (*method_poll)(ev_tstamp timeout);
86		158
87	/*****************************************************************************/	159	/*****************************************************************************/
88		160
89	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	#define VAR(name,decl) decl;
		227	#include "ev_vars.h"
		228	#undef VAR
		229	};
		230	#include "ev_wrap.h"
		231
		232	struct ev_loop default_loop_struct;
		233	static struct ev_loop *default_loop;
		234
		235	#else
		236
		237	#define VAR(name,decl) static decl;
		238	#include "ev_vars.h"
		239	#undef VAR
		240
		241	static int default_loop;
		242
		243	#endif
		244
		245	/*****************************************************************************/
		246
		247	inline ev_tstamp
90	ev_time (void)	248	ev_time (void)
91	{	249	{
92	#if EV_USE_REALTIME	250	#if EV_USE_REALTIME
93	struct timespec ts;	251	struct timespec ts;
94	clock_gettime (CLOCK_REALTIME, &ts);	252	clock_gettime (CLOCK_REALTIME, &ts);
…		…
98	gettimeofday (&tv, 0);	256	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	257	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	258	#endif
101	}	259	}
102		260
103	static ev_tstamp	261	inline ev_tstamp
104	get_clock (void)	262	get_clock (void)
105	{	263	{
106	#if EV_USE_MONOTONIC	264	#if EV_USE_MONOTONIC
107	if (have_monotonic)	265	if (expect_true (have_monotonic))
108	{	266	{
109	struct timespec ts;	267	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	268	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	269	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	270	}
113	#endif	271	#endif
114		272
115	return ev_time ();	273	return ev_time ();
116	}	274	}
117		275
		276	#if EV_MULTIPLICITY
		277	ev_tstamp
		278	ev_now (EV_P)
		279	{
		280	return ev_rt_now;
		281	}
		282	#endif
		283
118	#define array_nextsize(n) (((n) << 1) | 4 & ~3)	284	#define array_roundsize(type,n) ((n) | 4 & ~3)
119	#define array_prevsize(n) (((n) >> 1) | 4 & ~3)
120		285
121	#define array_needsize(base,cur,cnt,init) \	286	#define array_needsize(type,base,cur,cnt,init) \
122	if ((cnt) > cur) \	287	if (expect_false ((cnt) > cur)) \
123	{ \	288	{ \
124	int newcnt = cur; \	289	int newcnt = cur; \
125	do \	290	do \
126	{ \	291	{ \
127	newcnt = array_nextsize (newcnt); \	292	newcnt = array_roundsize (type, newcnt << 1); \
128	} \	293	} \
129	while ((cnt) > newcnt); \	294	while ((cnt) > newcnt); \
130	\	295	\
131	base = realloc (base, sizeof (*base) * (newcnt)); \	296	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
132	init (base + cur, newcnt - cur); \	297	init (base + cur, newcnt - cur); \
133	cur = newcnt; \	298	cur = newcnt; \
134	}	299	}
		300
		301	#define array_slim(type,stem) \
		302	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		303	{ \
		304	stem ## max = array_roundsize (stem ## cnt >> 1); \
		305	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		306	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		307	}
		308
		309	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		310	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		311	#define array_free_microshit(stem) \
		312	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		313
		314	#define array_free(stem, idx) \
		315	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
135		316
136	/*****************************************************************************/	317	/*****************************************************************************/
137
138	typedef struct
139	{
140	struct ev_io *head;
141	int events;
142	} ANFD;
143
144	static ANFD *anfds;
145	static int anfdmax;
146		318
147	static void	319	static void
148	anfds_init (ANFD *base, int count)	320	anfds_init (ANFD *base, int count)
149	{	321	{
150	while (count--)	322	while (count--)
151	{	323	{
152	base->head = 0;	324	base->head = 0;
153	base->events = EV_NONE;	325	base->events = EV_NONE;
		326	base->reify = 0;
		327
154	++base;	328	++base;
155	}	329	}
156	}	330	}
157		331
158	typedef struct	332	void
		333	ev_feed_event (EV_P_ void *w, int revents)
159	{	334	{
160	W w;	335	W w_ = (W)w;
161	int events;
162	} ANPENDING;
163		336
164	static ANPENDING *pendings;	337	if (w_->pending)
165	static int pendingmax, pendingcnt;
166
167	static void
168	event (W w, int events)
169	{
170	if (w->active)
171	{	338	{
172	w->pending = ++pendingcnt;
173	array_needsize (pendings, pendingmax, pendingcnt, );
174	pendings [pendingcnt - 1].w = w;
175	pendings [pendingcnt - 1].events = events;	339	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		340	return;
176	}	341	}
177	}
178		342
		343	w_->pending = ++pendingcnt [ABSPRI (w_)];
		344	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
		345	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		346	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		347	}
		348
179	static void	349	static void
180	queue_events (W *events, int eventcnt, int type)	350	queue_events (EV_P_ W *events, int eventcnt, int type)
181	{	351	{
182	int i;	352	int i;
183		353
184	for (i = 0; i < eventcnt; ++i)	354	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);	355	ev_feed_event (EV_A_ events [i], type);
186	}	356	}
187		357
188	static void	358	inline void
189	fd_event (int fd, int events)	359	fd_event (EV_P_ int fd, int revents)
190	{	360	{
191	ANFD *anfd = anfds + fd;	361	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	362	struct ev_io *w;
193		363
194	for (w = anfd->head; w; w = w->next)	364	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
195	{	365	{
196	int ev = w->events & events;	366	int ev = w->events & revents;
197		367
198	if (ev)	368	if (ev)
199	event ((W)w, ev);	369	ev_feed_event (EV_A_ (W)w, ev);
200	}	370	}
		371	}
		372
		373	void
		374	ev_feed_fd_event (EV_P_ int fd, int revents)
		375	{
		376	fd_event (EV_A_ fd, revents);
201	}	377	}
202		378
203	/*****************************************************************************/	379	/*****************************************************************************/
204		380
205	static int *fdchanges;
206	static int fdchangemax, fdchangecnt;
207
208	static void	381	static void
209	fd_reify (void)	382	fd_reify (EV_P)
210	{	383	{
211	int i;	384	int i;
212		385
213	for (i = 0; i < fdchangecnt; ++i)	386	for (i = 0; i < fdchangecnt; ++i)
214	{	387	{
…		…
216	ANFD *anfd = anfds + fd;	389	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	390	struct ev_io *w;
218		391
219	int events = 0;	392	int events = 0;
220		393
221	for (w = anfd->head; w; w = w->next)	394	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
222	events |= w->events;	395	events |= w->events;
223		396
224	anfd->events &= ~EV_REIFY;	397	anfd->reify = 0;
225		398
226	if (anfd->events != events)
227	{
228	method_modify (fd, anfd->events, events);	399	method_modify (EV_A_ fd, anfd->events, events);
229	anfd->events = events;	400	anfd->events = events;
230	}
231	}	401	}
232		402
233	fdchangecnt = 0;	403	fdchangecnt = 0;
234	}	404	}
235		405
236	static void	406	static void
237	fd_change (int fd)	407	fd_change (EV_P_ int fd)
238	{	408	{
239	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	409	if (anfds [fd].reify)
240	return;	410	return;
241		411
242	anfds [fd].events |= EV_REIFY;	412	anfds [fd].reify = 1;
243		413
244	++fdchangecnt;	414	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	415	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
246	fdchanges [fdchangecnt - 1] = fd;	416	fdchanges [fdchangecnt - 1] = fd;
247	}	417	}
248		418
		419	static void
		420	fd_kill (EV_P_ int fd)
		421	{
		422	struct ev_io *w;
		423
		424	while ((w = (struct ev_io *)anfds [fd].head))
		425	{
		426	ev_io_stop (EV_A_ w);
		427	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		428	}
		429	}
		430
		431	static int
		432	fd_valid (int fd)
		433	{
		434	#ifdef WIN32
		435	return !!win32_get_osfhandle (fd);
		436	#else
		437	return fcntl (fd, F_GETFD) != -1;
		438	#endif
		439	}
		440
249	/* called on EBADF to verify fds */	441	/* called on EBADF to verify fds */
250	static void	442	static void
251	fd_recheck (void)	443	fd_ebadf (EV_P)
252	{	444	{
253	int fd;	445	int fd;
254		446
255	for (fd = 0; fd < anfdmax; ++fd)	447	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	448	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	449	if (!fd_valid (fd) == -1 && errno == EBADF)
258	while (anfds [fd].head)	450	fd_kill (EV_A_ fd);
		451	}
		452
		453	/* called on ENOMEM in select/poll to kill some fds and retry */
		454	static void
		455	fd_enomem (EV_P)
		456	{
		457	int fd;
		458
		459	for (fd = anfdmax; fd--; )
		460	if (anfds [fd].events)
259	{	461	{
260	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	462	fd_kill (EV_A_ fd);
261	ev_io_stop (anfds [fd].head);	463	return;
262	}	464	}
		465	}
		466
		467	/* usually called after fork if method needs to re-arm all fds from scratch */
		468	static void
		469	fd_rearm_all (EV_P)
		470	{
		471	int fd;
		472
		473	/* this should be highly optimised to not do anything but set a flag */
		474	for (fd = 0; fd < anfdmax; ++fd)
		475	if (anfds [fd].events)
		476	{
		477	anfds [fd].events = 0;
		478	fd_change (EV_A_ fd);
		479	}
263	}	480	}
264		481
265	/*****************************************************************************/	482	/*****************************************************************************/
266		483
267	static struct ev_timer **timers;
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void	484	static void
274	upheap (WT *timers, int k)	485	upheap (WT *heap, int k)
275	{	486	{
276	WT w = timers [k];	487	WT w = heap [k];
277		488
278	while (k && timers [k >> 1]->at > w->at)	489	while (k && heap [k >> 1]->at > w->at)
279	{	490	{
280	timers [k] = timers [k >> 1];	491	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	492	((W)heap [k])->active = k + 1;
282	k >>= 1;	493	k >>= 1;
283	}	494	}
284		495
285	timers [k] = w;	496	heap [k] = w;
286	timers [k]->active = k + 1;	497	((W)heap [k])->active = k + 1;
287		498
288	}	499	}
289		500
290	static void	501	static void
291	downheap (WT *timers, int N, int k)	502	downheap (WT *heap, int N, int k)
292	{	503	{
293	WT w = timers [k];	504	WT w = heap [k];
294		505
295	while (k < (N >> 1))	506	while (k < (N >> 1))
296	{	507	{
297	int j = k << 1;	508	int j = k << 1;
298		509
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	510	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	511	++j;
301		512
302	if (w->at <= timers [j]->at)	513	if (w->at <= heap [j]->at)
303	break;	514	break;
304		515
305	timers [k] = timers [j];	516	heap [k] = heap [j];
306	timers [k]->active = k + 1;	517	((W)heap [k])->active = k + 1;
307	k = j;	518	k = j;
308	}	519	}
309		520
310	timers [k] = w;	521	heap [k] = w;
311	timers [k]->active = k + 1;	522	((W)heap [k])->active = k + 1;
		523	}
		524
		525	inline void
		526	adjustheap (WT *heap, int N, int k, ev_tstamp at)
		527	{
		528	ev_tstamp old_at = heap [k]->at;
		529	heap [k]->at = at;
		530
		531	if (old_at < at)
		532	downheap (heap, N, k);
		533	else
		534	upheap (heap, k);
312	}	535	}
313		536
314	/*****************************************************************************/	537	/*****************************************************************************/
315		538
316	typedef struct	539	typedef struct
317	{	540	{
318	struct ev_signal *head;	541	WL head;
319	sig_atomic_t gotsig;	542	sig_atomic_t volatile gotsig;
320	} ANSIG;	543	} ANSIG;
321		544
322	static ANSIG *signals;	545	static ANSIG *signals;
323	static int signalmax;	546	static int signalmax;
324		547
325	static int sigpipe [2];	548	static int sigpipe [2];
326	static sig_atomic_t gotsig;	549	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	550	static struct ev_io sigev;
328		551
329	static void	552	static void
330	signals_init (ANSIG *base, int count)	553	signals_init (ANSIG *base, int count)
331	{	554	{
332	while (count--)	555	while (count--)
333	{	556	{
334	base->head = 0;	557	base->head = 0;
335	base->gotsig = 0;	558	base->gotsig = 0;
		559
336	++base;	560	++base;
337	}	561	}
338	}	562	}
339		563
340	static void	564	static void
341	sighandler (int signum)	565	sighandler (int signum)
342	{	566	{
		567	#if WIN32
		568	signal (signum, sighandler);
		569	#endif
		570
343	signals [signum - 1].gotsig = 1;	571	signals [signum - 1].gotsig = 1;
344		572
345	if (!gotsig)	573	if (!gotsig)
346	{	574	{
		575	int old_errno = errno;
347	gotsig = 1;	576	gotsig = 1;
		577	#ifdef WIN32
		578	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		579	#else
348	write (sigpipe [1], &gotsig, 1);	580	write (sigpipe [1], &signum, 1);
		581	#endif
		582	errno = old_errno;
349	}	583	}
350	}	584	}
351		585
		586	void
		587	ev_feed_signal_event (EV_P_ int signum)
		588	{
		589	WL w;
		590
		591	#if EV_MULTIPLICITY
		592	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		593	#endif
		594
		595	--signum;
		596
		597	if (signum < 0 || signum >= signalmax)
		598	return;
		599
		600	signals [signum].gotsig = 0;
		601
		602	for (w = signals [signum].head; w; w = w->next)
		603	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		604	}
		605
352	static void	606	static void
353	sigcb (struct ev_io *iow, int revents)	607	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	608	{
355	struct ev_signal *w;
356	int sig;	609	int signum;
357		610
		611	#ifdef WIN32
		612	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		613	#else
		614	read (sigpipe [0], &revents, 1);
		615	#endif
358	gotsig = 0;	616	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		617
361	for (sig = signalmax; sig--; )	618	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	619	if (signals [signum].gotsig)
363	{	620	ev_feed_signal_event (EV_A_ signum + 1);
364	signals [sig].gotsig = 0;
365
366	for (w = signals [sig].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);
368	}
369	}	621	}
370		622
371	static void	623	static void
372	siginit (void)	624	siginit (EV_P)
373	{	625	{
		626	#ifndef WIN32
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	627	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	628	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376		629
377	/* rather than sort out wether we really need nb, set it */	630	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	631	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	632	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		633	#endif
380		634
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	635	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	636	ev_io_start (EV_A_ &sigev);
		637	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	638	}
384		639
385	/*****************************************************************************/	640	/*****************************************************************************/
386		641
387	static struct ev_idle **idles;
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397
398	static struct ev_child *childs [PID_HASHSIZE];	642	static struct ev_child *childs [PID_HASHSIZE];
		643
		644	#ifndef WIN32
		645
399	static struct ev_signal childev;	646	static struct ev_signal childev;
400		647
401	#ifndef WCONTINUED	648	#ifndef WCONTINUED
402	# define WCONTINUED 0	649	# define WCONTINUED 0
403	#endif	650	#endif
404		651
405	static void	652	static void
406	childcb (struct ev_signal *sw, int revents)	653	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	654	{
408	struct ev_child *w;	655	struct ev_child *w;
		656
		657	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		658	if (w->pid == pid || !w->pid)
		659	{
		660	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		661	w->rpid = pid;
		662	w->rstatus = status;
		663	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		664	}
		665	}
		666
		667	static void
		668	childcb (EV_P_ struct ev_signal *sw, int revents)
		669	{
409	int pid, status;	670	int pid, status;
410		671
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	672	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	673	{
413	if (w->pid == pid || w->pid == -1)	674	/* make sure we are called again until all childs have been reaped */
414	{	675	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
415	w->status = status;	676
416	event ((W)w, EV_CHILD);	677	child_reap (EV_A_ sw, pid, pid, status);
417	}	678	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		679	}
418	}	680	}
		681
		682	#endif
419		683
420	/*****************************************************************************/	684	/*****************************************************************************/
421		685
		686	#if EV_USE_KQUEUE
		687	# include "ev_kqueue.c"
		688	#endif
422	#if EV_USE_EPOLL	689	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	690	# include "ev_epoll.c"
424	#endif	691	#endif
		692	#if EV_USE_POLL
		693	# include "ev_poll.c"
		694	#endif
425	#if EV_USE_SELECT	695	#if EV_USE_SELECT
426	# include "ev_select.c"	696	# include "ev_select.c"
427	#endif	697	#endif
428		698
429	int	699	int
…		…
436	ev_version_minor (void)	706	ev_version_minor (void)
437	{	707	{
438	return EV_VERSION_MINOR;	708	return EV_VERSION_MINOR;
439	}	709	}
440		710
441	int ev_init (int flags)	711	/* return true if we are running with elevated privileges and should ignore env variables */
		712	static int
		713	enable_secure (void)
442	{	714	{
		715	#ifdef WIN32
		716	return 0;
		717	#else
		718	return getuid () != geteuid ()
		719	|| getgid () != getegid ();
		720	#endif
		721	}
		722
		723	int
		724	ev_method (EV_P)
		725	{
		726	return method;
		727	}
		728
		729	static void
		730	loop_init (EV_P_ int methods)
		731	{
443	if (!ev_method)	732	if (!method)
444	{	733	{
445	#if EV_USE_MONOTONIC	734	#if EV_USE_MONOTONIC
446	{	735	{
447	struct timespec ts;	736	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	737	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	738	have_monotonic = 1;
450	}	739	}
451	#endif	740	#endif
452		741
453	ev_now = ev_time ();	742	ev_rt_now = ev_time ();
454	now = get_clock ();	743	mn_now = get_clock ();
		744	now_floor = mn_now;
455	diff = ev_now - now;	745	rtmn_diff = ev_rt_now - mn_now;
456		746
457	if (pipe (sigpipe))	747	if (methods == EVMETHOD_AUTO)
458	return 0;	748	if (!enable_secure () && getenv ("LIBEV_METHODS"))
459		749	methods = atoi (getenv ("LIBEV_METHODS"));
		750	else
460	ev_method = EVMETHOD_NONE;	751	methods = EVMETHOD_ANY;
		752
		753	method = 0;
		754	#if EV_USE_WIN32
		755	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		756	#endif
		757	#if EV_USE_KQUEUE
		758	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		759	#endif
461	#if EV_USE_EPOLL	760	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	761	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		762	#endif
		763	#if EV_USE_POLL
		764	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
463	#endif	765	#endif
464	#if EV_USE_SELECT	766	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	767	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
466	#endif	768	#endif
467		769
		770	ev_init (&sigev, sigcb);
		771	ev_set_priority (&sigev, EV_MAXPRI);
		772	}
		773	}
		774
		775	void
		776	loop_destroy (EV_P)
		777	{
		778	int i;
		779
		780	#if EV_USE_WIN32
		781	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		782	#endif
		783	#if EV_USE_KQUEUE
		784	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		785	#endif
		786	#if EV_USE_EPOLL
		787	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		788	#endif
		789	#if EV_USE_POLL
		790	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		791	#endif
		792	#if EV_USE_SELECT
		793	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		794	#endif
		795
		796	for (i = NUMPRI; i--; )
		797	array_free (pending, [i]);
		798
		799	/* have to use the microsoft-never-gets-it-right macro */
		800	array_free_microshit (fdchange);
		801	array_free_microshit (timer);
		802	array_free_microshit (periodic);
		803	array_free_microshit (idle);
		804	array_free_microshit (prepare);
		805	array_free_microshit (check);
		806
		807	method = 0;
		808	}
		809
		810	static void
		811	loop_fork (EV_P)
		812	{
		813	#if EV_USE_EPOLL
		814	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		815	#endif
		816	#if EV_USE_KQUEUE
		817	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		818	#endif
		819
		820	if (ev_is_active (&sigev))
		821	{
		822	/* default loop */
		823
		824	ev_ref (EV_A);
		825	ev_io_stop (EV_A_ &sigev);
		826	close (sigpipe [0]);
		827	close (sigpipe [1]);
		828
		829	while (pipe (sigpipe))
		830	syserr ("(libev) error creating pipe");
		831
		832	siginit (EV_A);
		833	}
		834
		835	postfork = 0;
		836	}
		837
		838	#if EV_MULTIPLICITY
		839	struct ev_loop *
		840	ev_loop_new (int methods)
		841	{
		842	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		843
		844	memset (loop, 0, sizeof (struct ev_loop));
		845
		846	loop_init (EV_A_ methods);
		847
		848	if (ev_method (EV_A))
		849	return loop;
		850
		851	return 0;
		852	}
		853
		854	void
		855	ev_loop_destroy (EV_P)
		856	{
		857	loop_destroy (EV_A);
		858	ev_free (loop);
		859	}
		860
		861	void
		862	ev_loop_fork (EV_P)
		863	{
		864	postfork = 1;
		865	}
		866
		867	#endif
		868
		869	#if EV_MULTIPLICITY
		870	struct ev_loop *
		871	#else
		872	int
		873	#endif
		874	ev_default_loop (int methods)
		875	{
		876	if (sigpipe [0] == sigpipe [1])
		877	if (pipe (sigpipe))
		878	return 0;
		879
		880	if (!default_loop)
		881	{
		882	#if EV_MULTIPLICITY
		883	struct ev_loop *loop = default_loop = &default_loop_struct;
		884	#else
		885	default_loop = 1;
		886	#endif
		887
		888	loop_init (EV_A_ methods);
		889
468	if (ev_method)	890	if (ev_method (EV_A))
469	{	891	{
470	ev_watcher_init (&sigev, sigcb);
471	siginit ();	892	siginit (EV_A);
472		893
		894	#ifndef WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	895	ev_signal_init (&childev, childcb, SIGCHLD);
		896	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	897	ev_signal_start (EV_A_ &childev);
		898	ev_unref (EV_A); /* child watcher should not keep loop alive */
		899	#endif
475	}	900	}
		901	else
		902	default_loop = 0;
476	}	903	}
477		904
478	return ev_method;	905	return default_loop;
		906	}
		907
		908	void
		909	ev_default_destroy (void)
		910	{
		911	#if EV_MULTIPLICITY
		912	struct ev_loop *loop = default_loop;
		913	#endif
		914
		915	#ifndef WIN32
		916	ev_ref (EV_A); /* child watcher */
		917	ev_signal_stop (EV_A_ &childev);
		918	#endif
		919
		920	ev_ref (EV_A); /* signal watcher */
		921	ev_io_stop (EV_A_ &sigev);
		922
		923	close (sigpipe [0]); sigpipe [0] = 0;
		924	close (sigpipe [1]); sigpipe [1] = 0;
		925
		926	loop_destroy (EV_A);
		927	}
		928
		929	void
		930	ev_default_fork (void)
		931	{
		932	#if EV_MULTIPLICITY
		933	struct ev_loop *loop = default_loop;
		934	#endif
		935
		936	if (method)
		937	postfork = 1;
479	}	938	}
480		939
481	/*****************************************************************************/	940	/*****************************************************************************/
482		941
483	void
484	ev_prefork (void)
485	{
486	/* nop */
487	}
488
489	void
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif
502
503	ev_io_stop (&sigev);
504	close (sigpipe [0]);
505	close (sigpipe [1]);
506	pipe (sigpipe);
507	siginit ();
508	}
509
510	/*****************************************************************************/
511
512	static void	942	static int
		943	any_pending (EV_P)
		944	{
		945	int pri;
		946
		947	for (pri = NUMPRI; pri--; )
		948	if (pendingcnt [pri])
		949	return 1;
		950
		951	return 0;
		952	}
		953
		954	static void
513	call_pending (void)	955	call_pending (EV_P)
514	{	956	{
		957	int pri;
		958
		959	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	960	while (pendingcnt [pri])
516	{	961	{
517	ANPENDING *p = pendings + --pendingcnt;	962	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		963
519	if (p->w)	964	if (p->w)
520	{	965	{
521	p->w->pending = 0;	966	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	967	EV_CB_INVOKE (p->w, p->events);
523	}	968	}
524	}	969	}
525	}	970	}
526		971
527	static void	972	static void
528	timers_reify (void)	973	timers_reify (EV_P)
529	{	974	{
530	while (timercnt && timers [0]->at <= now)	975	while (timercnt && ((WT)timers [0])->at <= mn_now)
531	{	976	{
532	struct ev_timer *w = timers [0];	977	struct ev_timer *w = timers [0];
533		978
534	event ((W)w, EV_TIMEOUT);	979	assert (("inactive timer on timer heap detected", ev_is_active (w)));
535		980
536	/* first reschedule or stop timer */	981	/* first reschedule or stop timer */
537	if (w->repeat)	982	if (w->repeat)
538	{	983	{
		984	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
539	w->at = now + w->repeat;	985	((WT)w)->at = mn_now + w->repeat;
540	assert (("timer timeout in the past, negative repeat?", w->at > now));
541	downheap ((WT *)timers, timercnt, 0);	986	downheap ((WT *)timers, timercnt, 0);
542	}	987	}
543	else	988	else
544	ev_timer_stop (w); /* nonrepeating: stop timer */	989	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
545	}
546	}
547		990
		991	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		992	}
		993	}
		994
548	static void	995	static void
549	periodics_reify (void)	996	periodics_reify (EV_P)
550	{	997	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	998	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
552	{	999	{
553	struct ev_periodic *w = periodics [0];	1000	struct ev_periodic *w = periodics [0];
554		1001
		1002	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1003
555	/* first reschedule or stop timer */	1004	/* first reschedule or stop timer */
556	if (w->interval)	1005	if (w->reschedule_cb)
557	{	1006	{
		1007	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1008
		1009	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1010	downheap ((WT *)periodics, periodiccnt, 0);
		1011	}
		1012	else if (w->interval)
		1013	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1014	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
559	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1015	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	1016	downheap ((WT *)periodics, periodiccnt, 0);
561	}	1017	}
562	else	1018	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	1019	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		1020
565	event ((W)w, EV_TIMEOUT);	1021	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566	}	1022	}
567	}	1023	}
568		1024
569	static void	1025	static void
570	periodics_reschedule (ev_tstamp diff)	1026	periodics_reschedule (EV_P)
571	{	1027	{
572	int i;	1028	int i;
573		1029
574	/* adjust periodics after time jump */	1030	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	1031	for (i = 0; i < periodiccnt; ++i)
576	{	1032	{
577	struct ev_periodic *w = periodics [i];	1033	struct ev_periodic *w = periodics [i];
578		1034
		1035	if (w->reschedule_cb)
		1036	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
579	if (w->interval)	1037	else if (w->interval)
		1038	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1039	}
		1040
		1041	/* now rebuild the heap */
		1042	for (i = periodiccnt >> 1; i--; )
		1043	downheap ((WT *)periodics, periodiccnt, i);
		1044	}
		1045
		1046	inline int
		1047	time_update_monotonic (EV_P)
		1048	{
		1049	mn_now = get_clock ();
		1050
		1051	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1052	{
		1053	ev_rt_now = rtmn_diff + mn_now;
		1054	return 0;
		1055	}
		1056	else
		1057	{
		1058	now_floor = mn_now;
		1059	ev_rt_now = ev_time ();
		1060	return 1;
		1061	}
		1062	}
		1063
		1064	static void
		1065	time_update (EV_P)
		1066	{
		1067	int i;
		1068
		1069	#if EV_USE_MONOTONIC
		1070	if (expect_true (have_monotonic))
		1071	{
		1072	if (time_update_monotonic (EV_A))
580	{	1073	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1074	ev_tstamp odiff = rtmn_diff;
582		1075
583	if (fabs (diff) >= 1e-4)	1076	for (i = 4; --i; ) /* loop a few times, before making important decisions */
584	{	1077	{
585	ev_periodic_stop (w);	1078	rtmn_diff = ev_rt_now - mn_now;
586	ev_periodic_start (w);
587		1079
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1080	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1081	return; /* all is well */
		1082
		1083	ev_rt_now = ev_time ();
		1084	mn_now = get_clock ();
		1085	now_floor = mn_now;
589	}	1086	}
		1087
		1088	periodics_reschedule (EV_A);
		1089	/* no timer adjustment, as the monotonic clock doesn't jump */
		1090	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
590	}	1091	}
591	}	1092	}
592	}	1093	else
593		1094	#endif
594	static void	1095	{
595	time_update (void)
596	{
597	int i;
598
599	ev_now = ev_time ();	1096	ev_rt_now = ev_time ();
600		1097
601	if (have_monotonic)	1098	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
602	{
603	ev_tstamp odiff = diff;
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	1099	{
607	now = get_clock ();
608	diff = ev_now - now;
609
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)
611	return; /* all is well */
612
613	ev_now = ev_time ();
614	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}
619	else
620	{
621	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
622	{
623	periodics_reschedule (ev_now - now);	1100	periodics_reschedule (EV_A);
624		1101
625	/* adjust timers. this is easy, as the offset is the same for all */	1102	/* adjust timers. this is easy, as the offset is the same for all */
626	for (i = 0; i < timercnt; ++i)	1103	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	1104	((WT)timers [i])->at += ev_rt_now - mn_now;
628	}	1105	}
629		1106
630	now = ev_now;	1107	mn_now = ev_rt_now;
631	}	1108	}
632	}	1109	}
633		1110
634	int ev_loop_done;	1111	void
		1112	ev_ref (EV_P)
		1113	{
		1114	++activecnt;
		1115	}
635		1116
		1117	void
		1118	ev_unref (EV_P)
		1119	{
		1120	--activecnt;
		1121	}
		1122
		1123	static int loop_done;
		1124
		1125	void
636	void ev_loop (int flags)	1126	ev_loop (EV_P_ int flags)
637	{	1127	{
638	double block;	1128	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1129	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
640		1130
641	do	1131	do
642	{	1132	{
643	/* queue check watchers (and execute them) */	1133	/* queue check watchers (and execute them) */
644	if (preparecnt)	1134	if (expect_false (preparecnt))
645	{	1135	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1136	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	1137	call_pending (EV_A);
648	}	1138	}
649		1139
		1140	/* we might have forked, so reify kernel state if necessary */
		1141	if (expect_false (postfork))
		1142	loop_fork (EV_A);
		1143
650	/* update fd-related kernel structures */	1144	/* update fd-related kernel structures */
651	fd_reify ();	1145	fd_reify (EV_A);
652		1146
653	/* calculate blocking time */	1147	/* calculate blocking time */
654		1148
655	/* we only need this for !monotonic clockor timers, but as we basically	1149	/* we only need this for !monotonic clock or timers, but as we basically
656	always have timers, we just calculate it always */	1150	always have timers, we just calculate it always */
		1151	#if EV_USE_MONOTONIC
		1152	if (expect_true (have_monotonic))
		1153	time_update_monotonic (EV_A);
		1154	else
		1155	#endif
		1156	{
657	ev_now = ev_time ();	1157	ev_rt_now = ev_time ();
		1158	mn_now = ev_rt_now;
		1159	}
658		1160
659	if (flags & EVLOOP_NONBLOCK || idlecnt)	1161	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;	1162	block = 0.;
661	else	1163	else
662	{	1164	{
663	block = MAX_BLOCKTIME;	1165	block = MAX_BLOCKTIME;
664		1166
665	if (timercnt)	1167	if (timercnt)
666	{	1168	{
667	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1169	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
668	if (block > to) block = to;	1170	if (block > to) block = to;
669	}	1171	}
670		1172
671	if (periodiccnt)	1173	if (periodiccnt)
672	{	1174	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1175	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
674	if (block > to) block = to;	1176	if (block > to) block = to;
675	}	1177	}
676		1178
677	if (block < 0.) block = 0.;	1179	if (block < 0.) block = 0.;
678	}	1180	}
679		1181
680	method_poll (block);	1182	method_poll (EV_A_ block);
681		1183
682	/* update ev_now, do magic */	1184	/* update ev_rt_now, do magic */
683	time_update ();	1185	time_update (EV_A);
684		1186
685	/* queue pending timers and reschedule them */	1187	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1188	timers_reify (EV_A); /* relative timers called last */
687	periodics_reify (); /* absolute timers called first */	1189	periodics_reify (EV_A); /* absolute timers called first */
688		1190
689	/* queue idle watchers unless io or timers are pending */	1191	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	1192	if (idlecnt && !any_pending (EV_A))
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1193	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		1194
693	/* queue check watchers, to be executed first */	1195	/* queue check watchers, to be executed first */
694	if (checkcnt)	1196	if (checkcnt)
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1197	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1198
697	call_pending ();	1199	call_pending (EV_A);
698	}	1200	}
699	while (!ev_loop_done);	1201	while (activecnt && !loop_done);
700		1202
701	if (ev_loop_done != 2)	1203	if (loop_done != 2)
702	ev_loop_done = 0;	1204	loop_done = 0;
		1205	}
		1206
		1207	void
		1208	ev_unloop (EV_P_ int how)
		1209	{
		1210	loop_done = how;
703	}	1211	}
704		1212
705	/*****************************************************************************/	1213	/*****************************************************************************/
706		1214
707	static void	1215	inline void
708	wlist_add (WL *head, WL elem)	1216	wlist_add (WL *head, WL elem)
709	{	1217	{
710	elem->next = *head;	1218	elem->next = *head;
711	*head = elem;	1219	*head = elem;
712	}	1220	}
713		1221
714	static void	1222	inline void
715	wlist_del (WL *head, WL elem)	1223	wlist_del (WL *head, WL elem)
716	{	1224	{
717	while (*head)	1225	while (*head)
718	{	1226	{
719	if (*head == elem)	1227	if (*head == elem)
…		…
724		1232
725	head = &(*head)->next;	1233	head = &(*head)->next;
726	}	1234	}
727	}	1235	}
728		1236
729	static void	1237	inline void
730	ev_clear (W w)	1238	ev_clear_pending (EV_P_ W w)
731	{	1239	{
732	if (w->pending)	1240	if (w->pending)
733	{	1241	{
734	pendings [w->pending - 1].w = 0;	1242	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1243	w->pending = 0;
736	}	1244	}
737	}	1245	}
738		1246
739	static void	1247	inline void
740	ev_start (W w, int active)	1248	ev_start (EV_P_ W w, int active)
741	{	1249	{
		1250	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1251	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1252
742	w->active = active;	1253	w->active = active;
		1254	ev_ref (EV_A);
743	}	1255	}
744		1256
745	static void	1257	inline void
746	ev_stop (W w)	1258	ev_stop (EV_P_ W w)
747	{	1259	{
		1260	ev_unref (EV_A);
748	w->active = 0;	1261	w->active = 0;
749	}	1262	}
750		1263
751	/*****************************************************************************/	1264	/*****************************************************************************/
752		1265
753	void	1266	void
754	ev_io_start (struct ev_io *w)	1267	ev_io_start (EV_P_ struct ev_io *w)
755	{	1268	{
		1269	int fd = w->fd;
		1270
756	if (ev_is_active (w))	1271	if (ev_is_active (w))
757	return;	1272	return;
758		1273
759	int fd = w->fd;	1274	assert (("ev_io_start called with negative fd", fd >= 0));
760		1275
761	ev_start ((W)w, 1);	1276	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1277	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1278	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1279
765	fd_change (fd);	1280	fd_change (EV_A_ fd);
766	}	1281	}
767		1282
768	void	1283	void
769	ev_io_stop (struct ev_io *w)	1284	ev_io_stop (EV_P_ struct ev_io *w)
770	{	1285	{
771	ev_clear ((W)w);	1286	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1287	if (!ev_is_active (w))
773	return;	1288	return;
774		1289
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1290	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1291	ev_stop (EV_A_ (W)w);
777		1292
778	fd_change (w->fd);	1293	fd_change (EV_A_ w->fd);
779	}	1294	}
780		1295
781	void	1296	void
782	ev_timer_start (struct ev_timer *w)	1297	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1298	{
784	if (ev_is_active (w))	1299	if (ev_is_active (w))
785	return;	1300	return;
786		1301
787	w->at += now;	1302	((WT)w)->at += mn_now;
788		1303
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1304	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1305
791	ev_start ((W)w, ++timercnt);	1306	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1307	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
793	timers [timercnt - 1] = w;	1308	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1309	upheap ((WT *)timers, timercnt - 1);
795	}
796		1310
		1311	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1312	}
		1313
797	void	1314	void
798	ev_timer_stop (struct ev_timer *w)	1315	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1316	{
800	ev_clear ((W)w);	1317	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1318	if (!ev_is_active (w))
802	return;	1319	return;
803		1320
		1321	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1322
804	if (w->active < timercnt--)	1323	if (((W)w)->active < timercnt--)
805	{	1324	{
806	timers [w->active - 1] = timers [timercnt];	1325	timers [((W)w)->active - 1] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1326	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
808	}	1327	}
809		1328
810	w->at = w->repeat;	1329	((WT)w)->at = w->repeat;
811		1330
812	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
813	}	1332	}
814		1333
815	void	1334	void
816	ev_timer_again (struct ev_timer *w)	1335	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1336	{
818	if (ev_is_active (w))	1337	if (ev_is_active (w))
819	{	1338	{
820	if (w->repeat)	1339	if (w->repeat)
821	{
822	w->at = now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1340	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
824	}
825	else	1341	else
826	ev_timer_stop (w);	1342	ev_timer_stop (EV_A_ w);
827	}	1343	}
828	else if (w->repeat)	1344	else if (w->repeat)
829	ev_timer_start (w);	1345	ev_timer_start (EV_A_ w);
830	}	1346	}
831		1347
832	void	1348	void
833	ev_periodic_start (struct ev_periodic *w)	1349	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1350	{
835	if (ev_is_active (w))	1351	if (ev_is_active (w))
836	return;	1352	return;
837		1353
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1354	if (w->reschedule_cb)
839		1355	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1356	else if (w->interval)
		1357	{
		1358	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1359	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1360	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1361	}
843		1362
844	ev_start ((W)w, ++periodiccnt);	1363	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1364	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
846	periodics [periodiccnt - 1] = w;	1365	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1366	upheap ((WT *)periodics, periodiccnt - 1);
848	}
849		1367
		1368	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1369	}
		1370
850	void	1371	void
851	ev_periodic_stop (struct ev_periodic *w)	1372	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1373	{
853	ev_clear ((W)w);	1374	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1375	if (!ev_is_active (w))
855	return;	1376	return;
856		1377
		1378	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1379
857	if (w->active < periodiccnt--)	1380	if (((W)w)->active < periodiccnt--)
858	{	1381	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1382	periodics [((W)w)->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1383	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
861	}	1384	}
862		1385
863	ev_stop ((W)w);	1386	ev_stop (EV_A_ (W)w);
864	}	1387	}
865		1388
866	void	1389	void
		1390	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1391	{
		1392	/* TODO: use adjustheap and recalculation */
		1393	ev_periodic_stop (EV_A_ w);
		1394	ev_periodic_start (EV_A_ w);
		1395	}
		1396
		1397	void
867	ev_signal_start (struct ev_signal *w)	1398	ev_idle_start (EV_P_ struct ev_idle *w)
868	{	1399	{
869	if (ev_is_active (w))	1400	if (ev_is_active (w))
870	return;	1401	return;
871		1402
		1403	ev_start (EV_A_ (W)w, ++idlecnt);
		1404	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1405	idles [idlecnt - 1] = w;
		1406	}
		1407
		1408	void
		1409	ev_idle_stop (EV_P_ struct ev_idle *w)
		1410	{
		1411	ev_clear_pending (EV_A_ (W)w);
		1412	if (ev_is_active (w))
		1413	return;
		1414
		1415	idles [((W)w)->active - 1] = idles [--idlecnt];
		1416	ev_stop (EV_A_ (W)w);
		1417	}
		1418
		1419	void
		1420	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1421	{
		1422	if (ev_is_active (w))
		1423	return;
		1424
		1425	ev_start (EV_A_ (W)w, ++preparecnt);
		1426	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1427	prepares [preparecnt - 1] = w;
		1428	}
		1429
		1430	void
		1431	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1432	{
		1433	ev_clear_pending (EV_A_ (W)w);
		1434	if (ev_is_active (w))
		1435	return;
		1436
		1437	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1438	ev_stop (EV_A_ (W)w);
		1439	}
		1440
		1441	void
		1442	ev_check_start (EV_P_ struct ev_check *w)
		1443	{
		1444	if (ev_is_active (w))
		1445	return;
		1446
		1447	ev_start (EV_A_ (W)w, ++checkcnt);
		1448	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1449	checks [checkcnt - 1] = w;
		1450	}
		1451
		1452	void
		1453	ev_check_stop (EV_P_ struct ev_check *w)
		1454	{
		1455	ev_clear_pending (EV_A_ (W)w);
		1456	if (ev_is_active (w))
		1457	return;
		1458
		1459	checks [((W)w)->active - 1] = checks [--checkcnt];
		1460	ev_stop (EV_A_ (W)w);
		1461	}
		1462
		1463	#ifndef SA_RESTART
		1464	# define SA_RESTART 0
		1465	#endif
		1466
		1467	void
		1468	ev_signal_start (EV_P_ struct ev_signal *w)
		1469	{
		1470	#if EV_MULTIPLICITY
		1471	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1472	#endif
		1473	if (ev_is_active (w))
		1474	return;
		1475
		1476	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1477
872	ev_start ((W)w, 1);	1478	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1479	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1480	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1481
876	if (!w->next)	1482	if (!((WL)w)->next)
877	{	1483	{
		1484	#if WIN32
		1485	signal (w->signum, sighandler);
		1486	#else
878	struct sigaction sa;	1487	struct sigaction sa;
879	sa.sa_handler = sighandler;	1488	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1489	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1490	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1491	sigaction (w->signum, &sa, 0);
		1492	#endif
883	}	1493	}
884	}	1494	}
885		1495
886	void	1496	void
887	ev_signal_stop (struct ev_signal *w)	1497	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1498	{
889	ev_clear ((W)w);	1499	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1500	if (!ev_is_active (w))
891	return;	1501	return;
892		1502
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1503	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1504	ev_stop (EV_A_ (W)w);
895		1505
896	if (!signals [w->signum - 1].head)	1506	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1507	signal (w->signum, SIG_DFL);
898	}	1508	}
899		1509
900	void	1510	void
901	ev_idle_start (struct ev_idle *w)	1511	ev_child_start (EV_P_ struct ev_child *w)
902	{	1512	{
		1513	#if EV_MULTIPLICITY
		1514	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1515	#endif
903	if (ev_is_active (w))	1516	if (ev_is_active (w))
904	return;	1517	return;
905		1518
906	ev_start ((W)w, ++idlecnt);	1519	ev_start (EV_A_ (W)w, 1);
907	array_needsize (idles, idlemax, idlecnt, );	1520	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
908	idles [idlecnt - 1] = w;
909	}	1521	}
910		1522
911	void	1523	void
912	ev_idle_stop (struct ev_idle *w)	1524	ev_child_stop (EV_P_ struct ev_child *w)
913	{	1525	{
914	ev_clear ((W)w);	1526	ev_clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1527	if (ev_is_active (w))
916	return;	1528	return;
917		1529
918	idles [w->active - 1] = idles [--idlecnt];
919	ev_stop ((W)w);
920	}
921
922	void
923	ev_prepare_start (struct ev_prepare *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );
930	prepares [preparecnt - 1] = w;
931	}
932
933	void
934	ev_prepare_stop (struct ev_prepare *w)
935	{
936	ev_clear ((W)w);
937	if (ev_is_active (w))
938	return;
939
940	prepares [w->active - 1] = prepares [--preparecnt];
941	ev_stop ((W)w);
942	}
943
944	void
945	ev_check_start (struct ev_check *w)
946	{
947	if (ev_is_active (w))
948	return;
949
950	ev_start ((W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );
952	checks [checkcnt - 1] = w;
953	}
954
955	void
956	ev_check_stop (struct ev_check *w)
957	{
958	ev_clear ((W)w);
959	if (ev_is_active (w))
960	return;
961
962	checks [w->active - 1] = checks [--checkcnt];
963	ev_stop ((W)w);
964	}
965
966	void
967	ev_child_start (struct ev_child *w)
968	{
969	if (ev_is_active (w))
970	return;
971
972	ev_start ((W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}
975
976	void
977	ev_child_stop (struct ev_child *w)
978	{
979	ev_clear ((W)w);
980	if (ev_is_active (w))
981	return;
982
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1530	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1531	ev_stop (EV_A_ (W)w);
985	}	1532	}
986		1533
987	/*****************************************************************************/	1534	/*****************************************************************************/
988		1535
989	struct ev_once	1536	struct ev_once
…		…
993	void (*cb)(int revents, void *arg);	1540	void (*cb)(int revents, void *arg);
994	void *arg;	1541	void *arg;
995	};	1542	};
996		1543
997	static void	1544	static void
998	once_cb (struct ev_once *once, int revents)	1545	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1546	{
1000	void (*cb)(int revents, void *arg) = once->cb;	1547	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	1548	void *arg = once->arg;
1002		1549
1003	ev_io_stop (&once->io);	1550	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1551	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1552	ev_free (once);
1006		1553
1007	cb (revents, arg);	1554	cb (revents, arg);
1008	}	1555	}
1009		1556
1010	static void	1557	static void
1011	once_cb_io (struct ev_io *w, int revents)	1558	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1559	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1560	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014	}	1561	}
1015		1562
1016	static void	1563	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1564	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1565	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1566	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020	}	1567	}
1021		1568
1022	void	1569	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1570	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024	{	1571	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1572	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026		1573
1027	if (!once)	1574	if (!once)
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1575	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029	else	1576	else
1030	{	1577	{
1031	once->cb = cb;	1578	once->cb = cb;
1032	once->arg = arg;	1579	once->arg = arg;
1033		1580
1034	ev_watcher_init (&once->io, once_cb_io);	1581	ev_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1582	if (fd >= 0)
1036	{	1583	{
1037	ev_io_set (&once->io, fd, events);	1584	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1585	ev_io_start (EV_A_ &once->io);
1039	}	1586	}
1040		1587
1041	ev_watcher_init (&once->to, once_cb_to);	1588	ev_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1589	if (timeout >= 0.)
1043	{	1590	{
1044	ev_timer_set (&once->to, timeout, 0.);	1591	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1592	ev_timer_start (EV_A_ &once->to);
1046	}	1593	}
1047	}	1594	}
1048	}	1595	}
1049		1596
1050	/*****************************************************************************/
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif
1106
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}
1127
1128	#endif
1129
1130
1131
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