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Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.115 by root, Wed Nov 14 04:53:21 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
…		…
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		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# include "config.h"
		38
		39	# if HAVE_CLOCK_GETTIME
		40	# ifndef EV_USE_MONOTONIC
		41	# define EV_USE_MONOTONIC 1
		42	# endif
		43	# ifndef EV_USE_REALTIME
		44	# define EV_USE_REALTIME 1
		45	# endif
		46	# endif
		47
		48	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)
		49	# define EV_USE_SELECT 1
		50	# endif
		51
		52	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)
		53	# define EV_USE_POLL 1
		54	# endif
		55
		56	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)
		57	# define EV_USE_EPOLL 1
		58	# endif
		59
		60	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)
		61	# define EV_USE_KQUEUE 1
		62	# endif
		63
		64	#endif
		65
30	#include <math.h>	66	#include <math.h>
31	#include <stdlib.h>	67	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	68	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	69	#include <stddef.h>
36		70
37	#include <stdio.h>	71	#include <stdio.h>
38		72
39	#include <assert.h>	73	#include <assert.h>
40	#include <errno.h>	74	#include <errno.h>
41	#include <sys/time.h>	75	#include <sys/types.h>
42	#include <time.h>	76	#include <time.h>
43		77
44	#ifndef HAVE_MONOTONIC	78	#include <signal.h>
45	# ifdef CLOCK_MONOTONIC	79
46	# define HAVE_MONOTONIC 1	80	#ifndef _WIN32
		81	# include <unistd.h>
		82	# include <sys/time.h>
		83	# include <sys/wait.h>
		84	#else
		85	# define WIN32_LEAN_AND_MEAN
		86	# include <windows.h>
		87	# ifndef EV_SELECT_IS_WINSOCKET
		88	# define EV_SELECT_IS_WINSOCKET 1
47	# endif	89	# endif
48	#endif	90	#endif
49		91
		92	/**/
		93
		94	#ifndef EV_USE_MONOTONIC
		95	# define EV_USE_MONOTONIC 1
		96	#endif
		97
50	#ifndef HAVE_SELECT	98	#ifndef EV_USE_SELECT
51	# define HAVE_SELECT 1	99	# define EV_USE_SELECT 1
		100	# define EV_SELECT_USE_FD_SET 1
		101	#endif
		102
		103	#ifndef EV_USE_POLL
		104	# ifdef _WIN32
		105	# define EV_USE_POLL 0
		106	# else
		107	# define EV_USE_POLL 1
52	#endif	108	# endif
		109	#endif
53		110
54	#ifndef HAVE_EPOLL	111	#ifndef EV_USE_EPOLL
55	# define HAVE_EPOLL 0	112	# define EV_USE_EPOLL 0
56	#endif	113	#endif
57		114
		115	#ifndef EV_USE_KQUEUE
		116	# define EV_USE_KQUEUE 0
		117	#endif
		118
58	#ifndef HAVE_REALTIME	119	#ifndef EV_USE_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	120	# define EV_USE_REALTIME 1
60	#endif	121	#endif
		122
		123	/**/
		124
		125	/* darwin simply cannot be helped */
		126	#ifdef __APPLE__
		127	# undef EV_USE_POLL
		128	# undef EV_USE_KQUEUE
		129	#endif
		130
		131	#ifndef CLOCK_MONOTONIC
		132	# undef EV_USE_MONOTONIC
		133	# define EV_USE_MONOTONIC 0
		134	#endif
		135
		136	#ifndef CLOCK_REALTIME
		137	# undef EV_USE_REALTIME
		138	# define EV_USE_REALTIME 0
		139	#endif
		140
		141	#if EV_SELECT_IS_WINSOCKET
		142	# include <winsock.h>
		143	#endif
		144
		145	/**/
61		146
62	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	147	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63	#define MAX_BLOCKTIME 60.	148	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		149	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		150	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
64		151
		152	#ifdef EV_H
		153	# include EV_H
		154	#else
65	#include "ev.h"	155	# include "ev.h"
		156	#endif
		157
		158	#if __GNUC__ >= 3
		159	# define expect(expr,value) __builtin_expect ((expr),(value))
		160	# define inline inline
		161	#else
		162	# define expect(expr,value) (expr)
		163	# define inline static
		164	#endif
		165
		166	#define expect_false(expr) expect ((expr) != 0, 0)
		167	#define expect_true(expr) expect ((expr) != 0, 1)
		168
		169	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		170	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		171
		172	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		173	#define EMPTY2(a,b) /* used to suppress some warnings */
66		174
67	typedef struct ev_watcher *W;	175	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	176	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	177	typedef struct ev_watcher_time *WT;
70		178
71	static ev_tstamp now, diff; /* monotonic clock */	179	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		180
		181	#ifdef _WIN32
		182	# include "ev_win32.c"
		183	#endif
		184
		185	/*****************************************************************************/
		186
		187	static void (*syserr_cb)(const char *msg);
		188
		189	void ev_set_syserr_cb (void (*cb)(const char *msg))
		190	{
		191	syserr_cb = cb;
		192	}
		193
		194	static void
		195	syserr (const char *msg)
		196	{
		197	if (!msg)
		198	msg = "(libev) system error";
		199
		200	if (syserr_cb)
		201	syserr_cb (msg);
		202	else
		203	{
		204	perror (msg);
		205	abort ();
		206	}
		207	}
		208
		209	static void *(*alloc)(void *ptr, long size);
		210
		211	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		212	{
		213	alloc = cb;
		214	}
		215
		216	static void *
		217	ev_realloc (void *ptr, long size)
		218	{
		219	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		220
		221	if (!ptr && size)
		222	{
		223	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		224	abort ();
		225	}
		226
		227	return ptr;
		228	}
		229
		230	#define ev_malloc(size) ev_realloc (0, (size))
		231	#define ev_free(ptr) ev_realloc ((ptr), 0)
		232
		233	/*****************************************************************************/
		234
		235	typedef struct
		236	{
		237	WL head;
		238	unsigned char events;
		239	unsigned char reify;
		240	#if EV_SELECT_IS_WINSOCKET
		241	SOCKET handle;
		242	#endif
		243	} ANFD;
		244
		245	typedef struct
		246	{
		247	W w;
		248	int events;
		249	} ANPENDING;
		250
		251	#if EV_MULTIPLICITY
		252
		253	struct ev_loop
		254	{
		255	ev_tstamp ev_rt_now;
		256	#define ev_rt_now ((loop)->ev_rt_now)
		257	#define VAR(name,decl) decl;
		258	#include "ev_vars.h"
		259	#undef VAR
		260	};
		261	#include "ev_wrap.h"
		262
		263	struct ev_loop default_loop_struct;
		264	static struct ev_loop *default_loop;
		265
		266	#else
		267
72	ev_tstamp ev_now;	268	ev_tstamp ev_rt_now;
73	int ev_method;	269	#define VAR(name,decl) static decl;
		270	#include "ev_vars.h"
		271	#undef VAR
74		272
75	static int have_monotonic; /* runtime */	273	static int default_loop;
76		274
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	275	#endif
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		276
81	/*****************************************************************************/	277	/*****************************************************************************/
82		278
83	ev_tstamp	279	ev_tstamp
84	ev_time (void)	280	ev_time (void)
85	{	281	{
86	#if HAVE_REALTIME	282	#if EV_USE_REALTIME
87	struct timespec ts;	283	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	284	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	285	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	286	#else
91	struct timeval tv;	287	struct timeval tv;
92	gettimeofday (&tv, 0);	288	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	289	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	290	#endif
95	}	291	}
96		292
97	static ev_tstamp	293	inline ev_tstamp
98	get_clock (void)	294	get_clock (void)
99	{	295	{
100	#if HAVE_MONOTONIC	296	#if EV_USE_MONOTONIC
101	if (have_monotonic)	297	if (expect_true (have_monotonic))
102	{	298	{
103	struct timespec ts;	299	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	300	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	301	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	302	}
107	#endif	303	#endif
108		304
109	return ev_time ();	305	return ev_time ();
110	}	306	}
111		307
		308	#if EV_MULTIPLICITY
		309	ev_tstamp
		310	ev_now (EV_P)
		311	{
		312	return ev_rt_now;
		313	}
		314	#endif
		315
		316	#define array_roundsize(type,n) (((n) | 4) & ~3)
		317
112	#define array_needsize(base,cur,cnt,init) \	318	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	319	if (expect_false ((cnt) > cur)) \
114	{ \	320	{ \
115	int newcnt = cur ? cur << 1 : 16; \	321	int newcnt = cur; \
		322	do \
		323	{ \
		324	newcnt = array_roundsize (type, newcnt << 1); \
		325	} \
		326	while ((cnt) > newcnt); \
		327	\
116	base = realloc (base, sizeof (*base) * (newcnt)); \	328	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
117	init (base + cur, newcnt - cur); \	329	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	330	cur = newcnt; \
119	}	331	}
		332
		333	#define array_slim(type,stem) \
		334	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		335	{ \
		336	stem ## max = array_roundsize (stem ## cnt >> 1); \
		337	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		338	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		339	}
		340
		341	#define array_free(stem, idx) \
		342	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		343
121	/*****************************************************************************/	344	/*****************************************************************************/
122		345
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	346	static void
136	anfds_init (ANFD *base, int count)	347	anfds_init (ANFD *base, int count)
137	{	348	{
138	while (count--)	349	while (count--)
139	{	350	{
140	base->head = 0;	351	base->head = 0;
141	base->wev = base->rev = EV_NONE;	352	base->events = EV_NONE;
		353	base->reify = 0;
		354
142	++base;	355	++base;
143	}	356	}
144	}	357	}
145		358
146	typedef struct	359	void
		360	ev_feed_event (EV_P_ void *w, int revents)
147	{	361	{
148	W w;	362	W w_ = (W)w;
149	int events;
150	} ANPENDING;
151		363
152	static ANPENDING *pendings;	364	if (w_->pending)
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{	365	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	366	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		367	return;
164	}	368	}
165	}
166		369
		370	w_->pending = ++pendingcnt [ABSPRI (w_)];
		371	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		372	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		373	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		374	}
		375
167	static void	376	static void
		377	queue_events (EV_P_ W *events, int eventcnt, int type)
		378	{
		379	int i;
		380
		381	for (i = 0; i < eventcnt; ++i)
		382	ev_feed_event (EV_A_ events [i], type);
		383	}
		384
		385	inline void
168	fd_event (int fd, int events)	386	fd_event (EV_P_ int fd, int revents)
169	{	387	{
170	ANFD *anfd = anfds + fd;	388	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	389	struct ev_io *w;
172		390
173	for (w = anfd->head; w; w = w->next)	391	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
174	{	392	{
175	int ev = w->events & events;	393	int ev = w->events & revents;
176		394
177	if (ev)	395	if (ev)
178	event ((W)w, ev);	396	ev_feed_event (EV_A_ (W)w, ev);
179	}	397	}
180	}	398	}
181		399
182	static void	400	void
183	queue_events (W *events, int eventcnt, int type)	401	ev_feed_fd_event (EV_P_ int fd, int revents)
184	{	402	{
185	int i;	403	fd_event (EV_A_ fd, revents);
186
187	for (i = 0; i < eventcnt; ++i)
188	event (events [i], type);
189	}
190
191	/* called on EBADF to verify fds */
192	static void
193	fd_recheck ()
194	{
195	int fd;
196
197	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)
201	evio_stop (anfds [fd].head);
202	}	404	}
203		405
204	/*****************************************************************************/	406	/*****************************************************************************/
205		407
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	408	static void
213	upheap (WT *timers, int k)	409	fd_reify (EV_P)
214	{
215	WT w = timers [k];
216
217	while (k && timers [k >> 1]->at > w->at)
218	{
219	timers [k] = timers [k >> 1];
220	timers [k]->active = k + 1;
221	k >>= 1;
222	}
223
224	timers [k] = w;
225	timers [k]->active = k + 1;
226
227	}
228
229	static void
230	downheap (WT *timers, int N, int k)
231	{
232	WT w = timers [k];
233
234	while (k < (N >> 1))
235	{
236	int j = k << 1;
237
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239	++j;
240
241	if (w->at <= timers [j]->at)
242	break;
243
244	timers [k] = timers [j];
245	timers [k]->active = k + 1;
246	k = j;
247	}
248
249	timers [k] = w;
250	timers [k]->active = k + 1;
251	}
252
253	/*****************************************************************************/
254
255	typedef struct
256	{
257	struct ev_signal *head;
258	sig_atomic_t gotsig;
259	} ANSIG;
260
261	static ANSIG *signals;
262	static int signalmax;
263
264	static int sigpipe [2];
265	static sig_atomic_t gotsig;
266	static struct ev_io sigev;
267
268	static void
269	signals_init (ANSIG *base, int count)
270	{
271	while (count--)
272	{
273	base->head = 0;
274	base->gotsig = 0;
275	++base;
276	}
277	}
278
279	static void
280	sighandler (int signum)
281	{
282	signals [signum - 1].gotsig = 1;
283
284	if (!gotsig)
285	{
286	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);
288	}
289	}
290
291	static void
292	sigcb (struct ev_io *iow, int revents)
293	{
294	struct ev_signal *w;
295	int sig;
296
297	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299
300	for (sig = signalmax; sig--; )
301	if (signals [sig].gotsig)
302	{
303	signals [sig].gotsig = 0;
304
305	for (w = signals [sig].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);
307	}
308	}
309
310	static void
311	siginit (void)
312	{
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315
316	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
319
320	evio_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);
322	}
323
324	/*****************************************************************************/
325
326	static struct ev_idle **idles;
327	static int idlemax, idlecnt;
328
329	static struct ev_check **checks;
330	static int checkmax, checkcnt;
331
332	/*****************************************************************************/
333
334	#if HAVE_EPOLL
335	# include "ev_epoll.c"
336	#endif
337	#if HAVE_SELECT
338	# include "ev_select.c"
339	#endif
340
341	int ev_init (int flags)
342	{
343	#if HAVE_MONOTONIC
344	{
345	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;
348	}
349	#endif
350
351	ev_now = ev_time ();
352	now = get_clock ();
353	diff = ev_now - now;
354
355	if (pipe (sigpipe))
356	return 0;
357
358	ev_method = EVMETHOD_NONE;
359	#if HAVE_EPOLL
360	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
361	#endif
362	#if HAVE_SELECT
363	if (ev_method == EVMETHOD_NONE) select_init (flags);
364	#endif
365
366	if (ev_method)
367	{
368	evw_init (&sigev, sigcb);
369	siginit ();
370	}
371
372	return ev_method;
373	}
374
375	/*****************************************************************************/
376
377	void ev_prefork (void)
378	{
379	/* nop */
380	}
381
382	void ev_postfork_parent (void)
383	{
384	/* nop */
385	}
386
387	void ev_postfork_child (void)
388	{
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_EPOLL)
391	epoll_postfork_child ();
392	#endif
393
394	evio_stop (&sigev);
395	close (sigpipe [0]);
396	close (sigpipe [1]);
397	pipe (sigpipe);
398	siginit ();
399	}
400
401	/*****************************************************************************/
402
403	static void
404	fd_reify (void)
405	{	410	{
406	int i;	411	int i;
407		412
408	for (i = 0; i < fdchangecnt; ++i)	413	for (i = 0; i < fdchangecnt; ++i)
409	{	414	{
410	int fd = fdchanges [i];	415	int fd = fdchanges [i];
411	ANFD *anfd = anfds + fd;	416	ANFD *anfd = anfds + fd;
412	struct ev_io *w;	417	struct ev_io *w;
413		418
414	int wev = 0;	419	int events = 0;
415		420
416	for (w = anfd->head; w; w = w->next)	421	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
417	wev |= w->events;	422	events |= w->events;
418		423
419	if (anfd->wev != wev)	424	#if EV_SELECT_IS_WINSOCKET
		425	if (events)
420	{	426	{
421	method_modify (fd, anfd->wev, wev);	427	unsigned long argp;
422	anfd->wev = wev;	428	anfd->handle = _get_osfhandle (fd);
		429	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
423	}	430	}
		431	#endif
		432
		433	anfd->reify = 0;
		434
		435	method_modify (EV_A_ fd, anfd->events, events);
		436	anfd->events = events;
424	}	437	}
425		438
426	fdchangecnt = 0;	439	fdchangecnt = 0;
427	}	440	}
428		441
429	static void	442	static void
430	call_pending ()	443	fd_change (EV_P_ int fd)
431	{	444	{
432	while (pendingcnt)	445	if (anfds [fd].reify)
		446	return;
		447
		448	anfds [fd].reify = 1;
		449
		450	++fdchangecnt;
		451	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		452	fdchanges [fdchangecnt - 1] = fd;
		453	}
		454
		455	static void
		456	fd_kill (EV_P_ int fd)
		457	{
		458	struct ev_io *w;
		459
		460	while ((w = (struct ev_io *)anfds [fd].head))
		461	{
		462	ev_io_stop (EV_A_ w);
		463	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		464	}
		465	}
		466
		467	static int
		468	fd_valid (int fd)
		469	{
		470	#ifdef _WIN32
		471	return _get_osfhandle (fd) != -1;
		472	#else
		473	return fcntl (fd, F_GETFD) != -1;
		474	#endif
		475	}
		476
		477	/* called on EBADF to verify fds */
		478	static void
		479	fd_ebadf (EV_P)
		480	{
		481	int fd;
		482
		483	for (fd = 0; fd < anfdmax; ++fd)
		484	if (anfds [fd].events)
		485	if (!fd_valid (fd) == -1 && errno == EBADF)
		486	fd_kill (EV_A_ fd);
		487	}
		488
		489	/* called on ENOMEM in select/poll to kill some fds and retry */
		490	static void
		491	fd_enomem (EV_P)
		492	{
		493	int fd;
		494
		495	for (fd = anfdmax; fd--; )
		496	if (anfds [fd].events)
433	{	497	{
434	ANPENDING *p = pendings + --pendingcnt;	498	fd_kill (EV_A_ fd);
		499	return;
		500	}
		501	}
435		502
436	if (p->w)	503	/* usually called after fork if method needs to re-arm all fds from scratch */
		504	static void
		505	fd_rearm_all (EV_P)
		506	{
		507	int fd;
		508
		509	/* this should be highly optimised to not do anything but set a flag */
		510	for (fd = 0; fd < anfdmax; ++fd)
		511	if (anfds [fd].events)
		512	{
		513	anfds [fd].events = 0;
		514	fd_change (EV_A_ fd);
		515	}
		516	}
		517
		518	/*****************************************************************************/
		519
		520	static void
		521	upheap (WT *heap, int k)
		522	{
		523	WT w = heap [k];
		524
		525	while (k && heap [k >> 1]->at > w->at)
		526	{
		527	heap [k] = heap [k >> 1];
		528	((W)heap [k])->active = k + 1;
		529	k >>= 1;
		530	}
		531
		532	heap [k] = w;
		533	((W)heap [k])->active = k + 1;
		534
		535	}
		536
		537	static void
		538	downheap (WT *heap, int N, int k)
		539	{
		540	WT w = heap [k];
		541
		542	while (k < (N >> 1))
		543	{
		544	int j = k << 1;
		545
		546	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		547	++j;
		548
		549	if (w->at <= heap [j]->at)
		550	break;
		551
		552	heap [k] = heap [j];
		553	((W)heap [k])->active = k + 1;
		554	k = j;
		555	}
		556
		557	heap [k] = w;
		558	((W)heap [k])->active = k + 1;
		559	}
		560
		561	inline void
		562	adjustheap (WT *heap, int N, int k)
		563	{
		564	upheap (heap, k);
		565	downheap (heap, N, k);
		566	}
		567
		568	/*****************************************************************************/
		569
		570	typedef struct
		571	{
		572	WL head;
		573	sig_atomic_t volatile gotsig;
		574	} ANSIG;
		575
		576	static ANSIG *signals;
		577	static int signalmax;
		578
		579	static int sigpipe [2];
		580	static sig_atomic_t volatile gotsig;
		581	static struct ev_io sigev;
		582
		583	static void
		584	signals_init (ANSIG *base, int count)
		585	{
		586	while (count--)
		587	{
		588	base->head = 0;
		589	base->gotsig = 0;
		590
		591	++base;
		592	}
		593	}
		594
		595	static void
		596	sighandler (int signum)
		597	{
		598	#if _WIN32
		599	signal (signum, sighandler);
		600	#endif
		601
		602	signals [signum - 1].gotsig = 1;
		603
		604	if (!gotsig)
		605	{
		606	int old_errno = errno;
		607	gotsig = 1;
		608	write (sigpipe [1], &signum, 1);
		609	errno = old_errno;
		610	}
		611	}
		612
		613	void
		614	ev_feed_signal_event (EV_P_ int signum)
		615	{
		616	WL w;
		617
		618	#if EV_MULTIPLICITY
		619	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		620	#endif
		621
		622	--signum;
		623
		624	if (signum < 0 || signum >= signalmax)
		625	return;
		626
		627	signals [signum].gotsig = 0;
		628
		629	for (w = signals [signum].head; w; w = w->next)
		630	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		631	}
		632
		633	static void
		634	sigcb (EV_P_ struct ev_io *iow, int revents)
		635	{
		636	int signum;
		637
		638	read (sigpipe [0], &revents, 1);
		639	gotsig = 0;
		640
		641	for (signum = signalmax; signum--; )
		642	if (signals [signum].gotsig)
		643	ev_feed_signal_event (EV_A_ signum + 1);
		644	}
		645
		646	inline void
		647	fd_intern (int fd)
		648	{
		649	#ifdef _WIN32
		650	int arg = 1;
		651	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		652	#else
		653	fcntl (fd, F_SETFD, FD_CLOEXEC);
		654	fcntl (fd, F_SETFL, O_NONBLOCK);
		655	#endif
		656	}
		657
		658	static void
		659	siginit (EV_P)
		660	{
		661	fd_intern (sigpipe [0]);
		662	fd_intern (sigpipe [1]);
		663
		664	ev_io_set (&sigev, sigpipe [0], EV_READ);
		665	ev_io_start (EV_A_ &sigev);
		666	ev_unref (EV_A); /* child watcher should not keep loop alive */
		667	}
		668
		669	/*****************************************************************************/
		670
		671	static struct ev_child *childs [PID_HASHSIZE];
		672
		673	#ifndef _WIN32
		674
		675	static struct ev_signal childev;
		676
		677	#ifndef WCONTINUED
		678	# define WCONTINUED 0
		679	#endif
		680
		681	static void
		682	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		683	{
		684	struct ev_child *w;
		685
		686	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		687	if (w->pid == pid || !w->pid)
		688	{
		689	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		690	w->rpid = pid;
		691	w->rstatus = status;
		692	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		693	}
		694	}
		695
		696	static void
		697	childcb (EV_P_ struct ev_signal *sw, int revents)
		698	{
		699	int pid, status;
		700
		701	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		702	{
		703	/* make sure we are called again until all childs have been reaped */
		704	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		705
		706	child_reap (EV_A_ sw, pid, pid, status);
		707	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		708	}
		709	}
		710
		711	#endif
		712
		713	/*****************************************************************************/
		714
		715	#if EV_USE_KQUEUE
		716	# include "ev_kqueue.c"
		717	#endif
		718	#if EV_USE_EPOLL
		719	# include "ev_epoll.c"
		720	#endif
		721	#if EV_USE_POLL
		722	# include "ev_poll.c"
		723	#endif
		724	#if EV_USE_SELECT
		725	# include "ev_select.c"
		726	#endif
		727
		728	int
		729	ev_version_major (void)
		730	{
		731	return EV_VERSION_MAJOR;
		732	}
		733
		734	int
		735	ev_version_minor (void)
		736	{
		737	return EV_VERSION_MINOR;
		738	}
		739
		740	/* return true if we are running with elevated privileges and should ignore env variables */
		741	static int
		742	enable_secure (void)
		743	{
		744	#ifdef _WIN32
		745	return 0;
		746	#else
		747	return getuid () != geteuid ()
		748	|| getgid () != getegid ();
		749	#endif
		750	}
		751
		752	unsigned int
		753	ev_method (EV_P)
		754	{
		755	return method;
		756	}
		757
		758	static void
		759	loop_init (EV_P_ unsigned int flags)
		760	{
		761	if (!method)
		762	{
		763	#if EV_USE_MONOTONIC
		764	{
		765	struct timespec ts;
		766	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		767	have_monotonic = 1;
		768	}
		769	#endif
		770
		771	ev_rt_now = ev_time ();
		772	mn_now = get_clock ();
		773	now_floor = mn_now;
		774	rtmn_diff = ev_rt_now - mn_now;
		775
		776	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
		777	flags = atoi (getenv ("LIBEV_FLAGS"));
		778
		779	if (!(flags & 0x0000ffff))
		780	flags |= 0x0000ffff;
		781
		782	method = 0;
		783	#if EV_USE_KQUEUE
		784	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		785	#endif
		786	#if EV_USE_EPOLL
		787	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
		788	#endif
		789	#if EV_USE_POLL
		790	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
		791	#endif
		792	#if EV_USE_SELECT
		793	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
		794	#endif
		795
		796	ev_init (&sigev, sigcb);
		797	ev_set_priority (&sigev, EV_MAXPRI);
		798	}
		799	}
		800
		801	void
		802	loop_destroy (EV_P)
		803	{
		804	int i;
		805
		806	#if EV_USE_KQUEUE
		807	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		808	#endif
		809	#if EV_USE_EPOLL
		810	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		811	#endif
		812	#if EV_USE_POLL
		813	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		814	#endif
		815	#if EV_USE_SELECT
		816	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		817	#endif
		818
		819	for (i = NUMPRI; i--; )
		820	array_free (pending, [i]);
		821
		822	/* have to use the microsoft-never-gets-it-right macro */
		823	array_free (fdchange, EMPTY0);
		824	array_free (timer, EMPTY0);
		825	#if EV_PERIODICS
		826	array_free (periodic, EMPTY0);
		827	#endif
		828	array_free (idle, EMPTY0);
		829	array_free (prepare, EMPTY0);
		830	array_free (check, EMPTY0);
		831
		832	method = 0;
		833	}
		834
		835	static void
		836	loop_fork (EV_P)
		837	{
		838	#if EV_USE_EPOLL
		839	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		840	#endif
		841	#if EV_USE_KQUEUE
		842	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		843	#endif
		844
		845	if (ev_is_active (&sigev))
		846	{
		847	/* default loop */
		848
		849	ev_ref (EV_A);
		850	ev_io_stop (EV_A_ &sigev);
		851	close (sigpipe [0]);
		852	close (sigpipe [1]);
		853
		854	while (pipe (sigpipe))
		855	syserr ("(libev) error creating pipe");
		856
		857	siginit (EV_A);
		858	}
		859
		860	postfork = 0;
		861	}
		862
		863	#if EV_MULTIPLICITY
		864	struct ev_loop *
		865	ev_loop_new (unsigned int flags)
		866	{
		867	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		868
		869	memset (loop, 0, sizeof (struct ev_loop));
		870
		871	loop_init (EV_A_ flags);
		872
		873	if (ev_method (EV_A))
		874	return loop;
		875
		876	return 0;
		877	}
		878
		879	void
		880	ev_loop_destroy (EV_P)
		881	{
		882	loop_destroy (EV_A);
		883	ev_free (loop);
		884	}
		885
		886	void
		887	ev_loop_fork (EV_P)
		888	{
		889	postfork = 1;
		890	}
		891
		892	#endif
		893
		894	#if EV_MULTIPLICITY
		895	struct ev_loop *
		896	#else
		897	int
		898	#endif
		899	ev_default_loop (unsigned int flags)
		900	{
		901	if (sigpipe [0] == sigpipe [1])
		902	if (pipe (sigpipe))
		903	return 0;
		904
		905	if (!default_loop)
		906	{
		907	#if EV_MULTIPLICITY
		908	struct ev_loop *loop = default_loop = &default_loop_struct;
		909	#else
		910	default_loop = 1;
		911	#endif
		912
		913	loop_init (EV_A_ flags);
		914
		915	if (ev_method (EV_A))
437	{	916	{
438	p->w->pending = 0;	917	siginit (EV_A);
439	p->w->cb (p->w, p->events);	918
		919	#ifndef _WIN32
		920	ev_signal_init (&childev, childcb, SIGCHLD);
		921	ev_set_priority (&childev, EV_MAXPRI);
		922	ev_signal_start (EV_A_ &childev);
		923	ev_unref (EV_A); /* child watcher should not keep loop alive */
		924	#endif
440	}	925	}
		926	else
		927	default_loop = 0;
		928	}
		929
		930	return default_loop;
		931	}
		932
		933	void
		934	ev_default_destroy (void)
		935	{
		936	#if EV_MULTIPLICITY
		937	struct ev_loop *loop = default_loop;
		938	#endif
		939
		940	#ifndef _WIN32
		941	ev_ref (EV_A); /* child watcher */
		942	ev_signal_stop (EV_A_ &childev);
		943	#endif
		944
		945	ev_ref (EV_A); /* signal watcher */
		946	ev_io_stop (EV_A_ &sigev);
		947
		948	close (sigpipe [0]); sigpipe [0] = 0;
		949	close (sigpipe [1]); sigpipe [1] = 0;
		950
		951	loop_destroy (EV_A);
		952	}
		953
		954	void
		955	ev_default_fork (void)
		956	{
		957	#if EV_MULTIPLICITY
		958	struct ev_loop *loop = default_loop;
		959	#endif
		960
		961	if (method)
		962	postfork = 1;
		963	}
		964
		965	/*****************************************************************************/
		966
		967	static int
		968	any_pending (EV_P)
		969	{
		970	int pri;
		971
		972	for (pri = NUMPRI; pri--; )
		973	if (pendingcnt [pri])
		974	return 1;
		975
		976	return 0;
		977	}
		978
		979	static void
		980	call_pending (EV_P)
		981	{
		982	int pri;
		983
		984	for (pri = NUMPRI; pri--; )
		985	while (pendingcnt [pri])
		986	{
		987	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		988
		989	if (p->w)
		990	{
		991	p->w->pending = 0;
		992	EV_CB_INVOKE (p->w, p->events);
		993	}
441	}	994	}
442	}	995	}
443		996
444	static void	997	static void
445	timers_reify ()	998	timers_reify (EV_P)
446	{	999	{
447	while (timercnt && timers [0]->at <= now)	1000	while (timercnt && ((WT)timers [0])->at <= mn_now)
448	{	1001	{
449	struct ev_timer *w = timers [0];	1002	struct ev_timer *w = timers [0];
450		1003
451	event ((W)w, EV_TIMEOUT);	1004	assert (("inactive timer on timer heap detected", ev_is_active (w)));
452		1005
453	/* first reschedule or stop timer */	1006	/* first reschedule or stop timer */
454	if (w->repeat)	1007	if (w->repeat)
455	{	1008	{
		1009	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1010
456	w->at = now + w->repeat;	1011	((WT)w)->at += w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));	1012	if (((WT)w)->at < mn_now)
		1013	((WT)w)->at = mn_now;
		1014
458	downheap ((WT *)timers, timercnt, 0);	1015	downheap ((WT *)timers, timercnt, 0);
459	}	1016	}
460	else	1017	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	1018	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		1019
		1020	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1021	}
		1022	}
		1023
		1024	#if EV_PERIODICS
465	static void	1025	static void
466	periodics_reify ()	1026	periodics_reify (EV_P)
467	{	1027	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	1028	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
469	{	1029	{
470	struct ev_periodic *w = periodics [0];	1030	struct ev_periodic *w = periodics [0];
471		1031
		1032	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1033
472	/* first reschedule or stop timer */	1034	/* first reschedule or stop timer */
473	if (w->interval)	1035	if (w->reschedule_cb)
474	{	1036	{
		1037	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1038	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1039	downheap ((WT *)periodics, periodiccnt, 0);
		1040	}
		1041	else if (w->interval)
		1042	{
475	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1043	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
476	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1044	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
477	downheap ((WT *)periodics, periodiccnt, 0);	1045	downheap ((WT *)periodics, periodiccnt, 0);
478	}	1046	}
479	else	1047	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	1048	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		1049
482	event ((W)w, EV_TIMEOUT);	1050	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
483	}	1051	}
484	}	1052	}
485		1053
486	static void	1054	static void
487	periodics_reschedule (ev_tstamp diff)	1055	periodics_reschedule (EV_P)
488	{	1056	{
489	int i;	1057	int i;
490		1058
491	/* adjust periodics after time jump */	1059	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	1060	for (i = 0; i < periodiccnt; ++i)
493	{	1061	{
494	struct ev_periodic *w = periodics [i];	1062	struct ev_periodic *w = periodics [i];
495		1063
		1064	if (w->reschedule_cb)
		1065	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
496	if (w->interval)	1066	else if (w->interval)
		1067	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1068	}
		1069
		1070	/* now rebuild the heap */
		1071	for (i = periodiccnt >> 1; i--; )
		1072	downheap ((WT *)periodics, periodiccnt, i);
		1073	}
		1074	#endif
		1075
		1076	inline int
		1077	time_update_monotonic (EV_P)
		1078	{
		1079	mn_now = get_clock ();
		1080
		1081	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1082	{
		1083	ev_rt_now = rtmn_diff + mn_now;
		1084	return 0;
		1085	}
		1086	else
		1087	{
		1088	now_floor = mn_now;
		1089	ev_rt_now = ev_time ();
		1090	return 1;
		1091	}
		1092	}
		1093
		1094	static void
		1095	time_update (EV_P)
		1096	{
		1097	int i;
		1098
		1099	#if EV_USE_MONOTONIC
		1100	if (expect_true (have_monotonic))
		1101	{
		1102	if (time_update_monotonic (EV_A))
497	{	1103	{
498	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1104	ev_tstamp odiff = rtmn_diff;
499		1105
500	if (fabs (diff) >= 1e-4)	1106	for (i = 4; --i; ) /* loop a few times, before making important decisions */
501	{	1107	{
502	evperiodic_stop (w);	1108	rtmn_diff = ev_rt_now - mn_now;
503	evperiodic_start (w);
504		1109
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1110	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1111	return; /* all is well */
		1112
		1113	ev_rt_now = ev_time ();
		1114	mn_now = get_clock ();
		1115	now_floor = mn_now;
506	}	1116	}
		1117
		1118	# if EV_PERIODICS
		1119	periodics_reschedule (EV_A);
		1120	# endif
		1121	/* no timer adjustment, as the monotonic clock doesn't jump */
		1122	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
507	}	1123	}
508	}	1124	}
509	}	1125	else
510		1126	#endif
511	static void	1127	{
512	time_update ()
513	{
514	int i;
515
516	ev_now = ev_time ();	1128	ev_rt_now = ev_time ();
517		1129
518	if (have_monotonic)	1130	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
519	{
520	ev_tstamp odiff = diff;
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	1131	{
524	now = get_clock ();	1132	#if EV_PERIODICS
525	diff = ev_now - now;
526
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)
528	return; /* all is well */
529
530	ev_now = ev_time ();
531	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}
536	else
537	{
538	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
539	{
540	periodics_reschedule (ev_now - now);	1133	periodics_reschedule (EV_A);
		1134	#endif
541		1135
542	/* adjust timers. this is easy, as the offset is the same for all */	1136	/* adjust timers. this is easy, as the offset is the same for all */
543	for (i = 0; i < timercnt; ++i)	1137	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	1138	((WT)timers [i])->at += ev_rt_now - mn_now;
545	}	1139	}
546		1140
547	now = ev_now;	1141	mn_now = ev_rt_now;
548	}	1142	}
549	}	1143	}
550		1144
551	int ev_loop_done;	1145	void
		1146	ev_ref (EV_P)
		1147	{
		1148	++activecnt;
		1149	}
552		1150
		1151	void
		1152	ev_unref (EV_P)
		1153	{
		1154	--activecnt;
		1155	}
		1156
		1157	static int loop_done;
		1158
		1159	void
553	void ev_loop (int flags)	1160	ev_loop (EV_P_ int flags)
554	{	1161	{
555	double block;	1162	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1163	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
557		1164
558	if (checkcnt)	1165	while (activecnt)
559	{	1166	{
560	queue_events ((W *)checks, checkcnt, EV_CHECK);	1167	/* queue check watchers (and execute them) */
		1168	if (expect_false (preparecnt))
		1169	{
		1170	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
561	call_pending ();	1171	call_pending (EV_A);
562	}	1172	}
563		1173
564	do	1174	/* we might have forked, so reify kernel state if necessary */
565	{	1175	if (expect_false (postfork))
		1176	loop_fork (EV_A);
		1177
566	/* update fd-related kernel structures */	1178	/* update fd-related kernel structures */
567	fd_reify ();	1179	fd_reify (EV_A);
568		1180
569	/* calculate blocking time */	1181	/* calculate blocking time */
570		1182
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1183	/* we only need this for !monotonic clock or timers, but as we basically
		1184	always have timers, we just calculate it always */
		1185	#if EV_USE_MONOTONIC
		1186	if (expect_true (have_monotonic))
		1187	time_update_monotonic (EV_A);
		1188	else
		1189	#endif
		1190	{
572	ev_now = ev_time ();	1191	ev_rt_now = ev_time ();
		1192	mn_now = ev_rt_now;
		1193	}
573		1194
574	if (flags & EVLOOP_NONBLOCK || idlecnt)	1195	if (flags & EVLOOP_NONBLOCK || idlecnt)
575	block = 0.;	1196	block = 0.;
576	else	1197	else
577	{	1198	{
578	block = MAX_BLOCKTIME;	1199	block = MAX_BLOCKTIME;
579		1200
580	if (timercnt)	1201	if (timercnt)
581	{	1202	{
582	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1203	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
583	if (block > to) block = to;	1204	if (block > to) block = to;
584	}	1205	}
585		1206
		1207	#if EV_PERIODICS
586	if (periodiccnt)	1208	if (periodiccnt)
587	{	1209	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1210	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
589	if (block > to) block = to;	1211	if (block > to) block = to;
590	}	1212	}
		1213	#endif
591		1214
592	if (block < 0.) block = 0.;	1215	if (block < 0.) block = 0.;
593	}	1216	}
594		1217
595	method_poll (block);	1218	method_poll (EV_A_ block);
596		1219
597	/* update ev_now, do magic */	1220	/* update ev_rt_now, do magic */
598	time_update ();	1221	time_update (EV_A);
599		1222
600	/* queue pending timers and reschedule them */	1223	/* queue pending timers and reschedule them */
		1224	timers_reify (EV_A); /* relative timers called last */
		1225	#if EV_PERIODICS
601	periodics_reify (); /* absolute timers first */	1226	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */	1227	#endif
603		1228
604	/* queue idle watchers unless io or timers are pending */	1229	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	1230	if (idlecnt && !any_pending (EV_A))
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	1231	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		1232
608	/* queue check and possibly idle watchers */	1233	/* queue check watchers, to be executed first */
		1234	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	1235	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		1236
611	call_pending ();	1237	call_pending (EV_A);
612	}
613	while (!ev_loop_done);
614		1238
		1239	if (loop_done)
		1240	break;
		1241	}
		1242
615	if (ev_loop_done != 2)	1243	if (loop_done != 2)
616	ev_loop_done = 0;	1244	loop_done = 0;
		1245	}
		1246
		1247	void
		1248	ev_unloop (EV_P_ int how)
		1249	{
		1250	loop_done = how;
617	}	1251	}
618		1252
619	/*****************************************************************************/	1253	/*****************************************************************************/
620		1254
621	static void	1255	inline void
622	wlist_add (WL *head, WL elem)	1256	wlist_add (WL *head, WL elem)
623	{	1257	{
624	elem->next = *head;	1258	elem->next = *head;
625	*head = elem;	1259	*head = elem;
626	}	1260	}
627		1261
628	static void	1262	inline void
629	wlist_del (WL *head, WL elem)	1263	wlist_del (WL *head, WL elem)
630	{	1264	{
631	while (*head)	1265	while (*head)
632	{	1266	{
633	if (*head == elem)	1267	if (*head == elem)
…		…
638		1272
639	head = &(*head)->next;	1273	head = &(*head)->next;
640	}	1274	}
641	}	1275	}
642		1276
643	static void	1277	inline void
644	ev_clear (W w)	1278	ev_clear_pending (EV_P_ W w)
645	{	1279	{
646	if (w->pending)	1280	if (w->pending)
647	{	1281	{
648	pendings [w->pending - 1].w = 0;	1282	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1283	w->pending = 0;
650	}	1284	}
651	}	1285	}
652		1286
653	static void	1287	inline void
654	ev_start (W w, int active)	1288	ev_start (EV_P_ W w, int active)
655	{	1289	{
		1290	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1291	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1292
656	w->active = active;	1293	w->active = active;
		1294	ev_ref (EV_A);
657	}	1295	}
658		1296
659	static void	1297	inline void
660	ev_stop (W w)	1298	ev_stop (EV_P_ W w)
661	{	1299	{
		1300	ev_unref (EV_A);
662	w->active = 0;	1301	w->active = 0;
663	}	1302	}
664		1303
665	/*****************************************************************************/	1304	/*****************************************************************************/
666		1305
667	void	1306	void
668	evio_start (struct ev_io *w)	1307	ev_io_start (EV_P_ struct ev_io *w)
669	{	1308	{
		1309	int fd = w->fd;
		1310
670	if (ev_is_active (w))	1311	if (ev_is_active (w))
671	return;	1312	return;
672		1313
673	int fd = w->fd;	1314	assert (("ev_io_start called with negative fd", fd >= 0));
674		1315
675	ev_start ((W)w, 1);	1316	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1317	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1318	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1319
679	++fdchangecnt;	1320	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1321	}
683		1322
684	void	1323	void
685	evio_stop (struct ev_io *w)	1324	ev_io_stop (EV_P_ struct ev_io *w)
686	{	1325	{
687	ev_clear ((W)w);	1326	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1327	if (!ev_is_active (w))
689	return;	1328	return;
690		1329
		1330	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1331
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1332	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1333	ev_stop (EV_A_ (W)w);
693		1334
694	++fdchangecnt;	1335	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1336	}
698		1337
699	void	1338	void
700	evtimer_start (struct ev_timer *w)	1339	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1340	{
702	if (ev_is_active (w))	1341	if (ev_is_active (w))
703	return;	1342	return;
704		1343
705	w->at += now;	1344	((WT)w)->at += mn_now;
706		1345
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1346	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1347
709	ev_start ((W)w, ++timercnt);	1348	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1349	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
711	timers [timercnt - 1] = w;	1350	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1351	upheap ((WT *)timers, timercnt - 1);
713	}
714		1352
		1353	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1354	}
		1355
715	void	1356	void
716	evtimer_stop (struct ev_timer *w)	1357	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1358	{
718	ev_clear ((W)w);	1359	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1360	if (!ev_is_active (w))
720	return;	1361	return;
721		1362
		1363	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1364
722	if (w->active < timercnt--)	1365	if (((W)w)->active < timercnt--)
723	{	1366	{
724	timers [w->active - 1] = timers [timercnt];	1367	timers [((W)w)->active - 1] = timers [timercnt];
725	downheap ((WT *)timers, timercnt, w->active - 1);	1368	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
726	}	1369	}
727		1370
728	w->at = w->repeat;	1371	((WT)w)->at -= mn_now;
729		1372
730	ev_stop ((W)w);	1373	ev_stop (EV_A_ (W)w);
731	}	1374	}
732		1375
733	void	1376	void
734	evtimer_again (struct ev_timer *w)	1377	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1378	{
736	if (ev_is_active (w))	1379	if (ev_is_active (w))
737	{	1380	{
738	if (w->repeat)	1381	if (w->repeat)
739	{	1382	{
740	w->at = now + w->repeat;	1383	((WT)w)->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1384	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
742	}	1385	}
743	else	1386	else
744	evtimer_stop (w);	1387	ev_timer_stop (EV_A_ w);
745	}	1388	}
746	else if (w->repeat)	1389	else if (w->repeat)
		1390	{
		1391	w->at = w->repeat;
747	evtimer_start (w);	1392	ev_timer_start (EV_A_ w);
		1393	}
748	}	1394	}
749		1395
		1396	#if EV_PERIODICS
750	void	1397	void
751	evperiodic_start (struct ev_periodic *w)	1398	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1399	{
753	if (ev_is_active (w))	1400	if (ev_is_active (w))
754	return;	1401	return;
755		1402
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1403	if (w->reschedule_cb)
757		1404	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1405	else if (w->interval)
		1406	{
		1407	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
758	/* this formula differs from the one in periodic_reify because we do not always round up */	1408	/* this formula differs from the one in periodic_reify because we do not always round up */
759	if (w->interval)
760	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1409	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1410	}
761		1411
762	ev_start ((W)w, ++periodiccnt);	1412	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1413	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
764	periodics [periodiccnt - 1] = w;	1414	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1415	upheap ((WT *)periodics, periodiccnt - 1);
766	}
767		1416
		1417	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1418	}
		1419
768	void	1420	void
769	evperiodic_stop (struct ev_periodic *w)	1421	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1422	{
771	ev_clear ((W)w);	1423	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1424	if (!ev_is_active (w))
773	return;	1425	return;
774		1426
		1427	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1428
775	if (w->active < periodiccnt--)	1429	if (((W)w)->active < periodiccnt--)
776	{	1430	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1431	periodics [((W)w)->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1432	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
779	}	1433	}
780		1434
781	ev_stop ((W)w);	1435	ev_stop (EV_A_ (W)w);
782	}	1436	}
783		1437
784	void	1438	void
785	evsignal_start (struct ev_signal *w)	1439	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1440	{
		1441	/* TODO: use adjustheap and recalculation */
		1442	ev_periodic_stop (EV_A_ w);
		1443	ev_periodic_start (EV_A_ w);
		1444	}
		1445	#endif
		1446
		1447	void
		1448	ev_idle_start (EV_P_ struct ev_idle *w)
786	{	1449	{
787	if (ev_is_active (w))	1450	if (ev_is_active (w))
788	return;	1451	return;
789		1452
		1453	ev_start (EV_A_ (W)w, ++idlecnt);
		1454	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1455	idles [idlecnt - 1] = w;
		1456	}
		1457
		1458	void
		1459	ev_idle_stop (EV_P_ struct ev_idle *w)
		1460	{
		1461	ev_clear_pending (EV_A_ (W)w);
		1462	if (!ev_is_active (w))
		1463	return;
		1464
		1465	idles [((W)w)->active - 1] = idles [--idlecnt];
		1466	ev_stop (EV_A_ (W)w);
		1467	}
		1468
		1469	void
		1470	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1471	{
		1472	if (ev_is_active (w))
		1473	return;
		1474
		1475	ev_start (EV_A_ (W)w, ++preparecnt);
		1476	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1477	prepares [preparecnt - 1] = w;
		1478	}
		1479
		1480	void
		1481	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1482	{
		1483	ev_clear_pending (EV_A_ (W)w);
		1484	if (!ev_is_active (w))
		1485	return;
		1486
		1487	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1488	ev_stop (EV_A_ (W)w);
		1489	}
		1490
		1491	void
		1492	ev_check_start (EV_P_ struct ev_check *w)
		1493	{
		1494	if (ev_is_active (w))
		1495	return;
		1496
		1497	ev_start (EV_A_ (W)w, ++checkcnt);
		1498	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1499	checks [checkcnt - 1] = w;
		1500	}
		1501
		1502	void
		1503	ev_check_stop (EV_P_ struct ev_check *w)
		1504	{
		1505	ev_clear_pending (EV_A_ (W)w);
		1506	if (!ev_is_active (w))
		1507	return;
		1508
		1509	checks [((W)w)->active - 1] = checks [--checkcnt];
		1510	ev_stop (EV_A_ (W)w);
		1511	}
		1512
		1513	#ifndef SA_RESTART
		1514	# define SA_RESTART 0
		1515	#endif
		1516
		1517	void
		1518	ev_signal_start (EV_P_ struct ev_signal *w)
		1519	{
		1520	#if EV_MULTIPLICITY
		1521	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1522	#endif
		1523	if (ev_is_active (w))
		1524	return;
		1525
		1526	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1527
790	ev_start ((W)w, 1);	1528	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1529	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1530	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1531
794	if (!w->next)	1532	if (!((WL)w)->next)
795	{	1533	{
		1534	#if _WIN32
		1535	signal (w->signum, sighandler);
		1536	#else
796	struct sigaction sa;	1537	struct sigaction sa;
797	sa.sa_handler = sighandler;	1538	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1539	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1540	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1541	sigaction (w->signum, &sa, 0);
		1542	#endif
801	}	1543	}
802	}	1544	}
803		1545
804	void	1546	void
805	evsignal_stop (struct ev_signal *w)	1547	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1548	{
807	ev_clear ((W)w);	1549	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1550	if (!ev_is_active (w))
809	return;	1551	return;
810		1552
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1553	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1554	ev_stop (EV_A_ (W)w);
813		1555
814	if (!signals [w->signum - 1].head)	1556	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1557	signal (w->signum, SIG_DFL);
816	}	1558	}
817		1559
818	void evidle_start (struct ev_idle *w)	1560	void
		1561	ev_child_start (EV_P_ struct ev_child *w)
819	{	1562	{
		1563	#if EV_MULTIPLICITY
		1564	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1565	#endif
820	if (ev_is_active (w))	1566	if (ev_is_active (w))
821	return;	1567	return;
822		1568
823	ev_start ((W)w, ++idlecnt);	1569	ev_start (EV_A_ (W)w, 1);
824	array_needsize (idles, idlemax, idlecnt, );	1570	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
825	idles [idlecnt - 1] = w;
826	}	1571	}
827		1572
828	void evidle_stop (struct ev_idle *w)	1573	void
		1574	ev_child_stop (EV_P_ struct ev_child *w)
829	{	1575	{
830	ev_clear ((W)w);	1576	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1577	if (!ev_is_active (w))
832	return;	1578	return;
833		1579
834	idles [w->active - 1] = idles [--idlecnt];	1580	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
835	ev_stop ((W)w);	1581	ev_stop (EV_A_ (W)w);
836	}
837
838	void evcheck_start (struct ev_check *w)
839	{
840	if (ev_is_active (w))
841	return;
842
843	ev_start ((W)w, ++checkcnt);
844	array_needsize (checks, checkmax, checkcnt, );
845	checks [checkcnt - 1] = w;
846	}
847
848	void evcheck_stop (struct ev_check *w)
849	{
850	ev_clear ((W)w);
851	if (ev_is_active (w))
852	return;
853
854	checks [w->active - 1] = checks [--checkcnt];
855	ev_stop ((W)w);
856	}	1582	}
857		1583
858	/*****************************************************************************/	1584	/*****************************************************************************/
859		1585
860	struct ev_once	1586	struct ev_once
…		…
864	void (*cb)(int revents, void *arg);	1590	void (*cb)(int revents, void *arg);
865	void *arg;	1591	void *arg;
866	};	1592	};
867		1593
868	static void	1594	static void
869	once_cb (struct ev_once *once, int revents)	1595	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1596	{
871	void (*cb)(int revents, void *arg) = once->cb;	1597	void (*cb)(int revents, void *arg) = once->cb;
872	void *arg = once->arg;	1598	void *arg = once->arg;
873		1599
874	evio_stop (&once->io);	1600	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1601	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1602	ev_free (once);
877		1603
878	cb (revents, arg);	1604	cb (revents, arg);
879	}	1605	}
880		1606
881	static void	1607	static void
882	once_cb_io (struct ev_io *w, int revents)	1608	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1609	{
884	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1610	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
885	}	1611	}
886		1612
887	static void	1613	static void
888	once_cb_to (struct ev_timer *w, int revents)	1614	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1615	{
890	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1616	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
891	}	1617	}
892		1618
893	void	1619	void
894	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1620	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
895	{	1621	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1622	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
897		1623
898	if (!once)	1624	if (!once)
899	cb (EV_ERROR, arg);	1625	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
900	else	1626	else
901	{	1627	{
902	once->cb = cb;	1628	once->cb = cb;
903	once->arg = arg;	1629	once->arg = arg;
904		1630
905	evw_init (&once->io, once_cb_io);	1631	ev_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1632	if (fd >= 0)
908	{	1633	{
909	evio_set (&once->io, fd, events);	1634	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1635	ev_io_start (EV_A_ &once->io);
911	}	1636	}
912		1637
913	evw_init (&once->to, once_cb_to);	1638	ev_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1639	if (timeout >= 0.)
916	{	1640	{
917	evtimer_set (&once->to, timeout, 0.);	1641	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1642	ev_timer_start (EV_A_ &once->to);
919	}	1643	}
920	}	1644	}
921	}	1645	}
922		1646
923	/*****************************************************************************/	1647	#ifdef __cplusplus
924
925	#if 0
926
927	struct ev_io wio;
928
929	static void
930	sin_cb (struct ev_io *w, int revents)
931	{
932	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
933	}	1648	}
934
935	static void
936	ocb (struct ev_timer *w, int revents)
937	{
938	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
939	evtimer_stop (w);
940	evtimer_start (w);
941	}
942
943	static void
944	scb (struct ev_signal *w, int revents)
945	{
946	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
947	evio_stop (&wio);
948	evio_start (&wio);
949	}
950
951	static void
952	gcb (struct ev_signal *w, int revents)
953	{
954	fprintf (stderr, "generic %x\n", revents);
955
956	}
957
958	int main (void)
959	{
960	ev_init (0);
961
962	evio_init (&wio, sin_cb, 0, EV_READ);
963	evio_start (&wio);
964
965	struct ev_timer t[10000];
966
967	#if 0
968	int i;
969	for (i = 0; i < 10000; ++i)
970	{
971	struct ev_timer *w = t + i;
972	evw_init (w, ocb, i);
973	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
974	evtimer_start (w);
975	if (drand48 () < 0.5)
976	evtimer_stop (w);
977	}
978	#endif	1649	#endif
979		1650
980	struct ev_timer t1;
981	evtimer_init (&t1, ocb, 5, 10);
982	evtimer_start (&t1);
983
984	struct ev_signal sig;
985	evsignal_init (&sig, scb, SIGQUIT);
986	evsignal_start (&sig);
987
988	struct ev_check cw;
989	evcheck_init (&cw, gcb);
990	evcheck_start (&cw);
991
992	struct ev_idle iw;
993	evidle_init (&iw, gcb);
994	evidle_start (&iw);
995
996	ev_loop (0);
997
998	return 0;
999	}
1000
1001	#endif
1002
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1004
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