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Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.84 by root, Fri Nov 9 23:04:35 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	59	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	60	#include <stddef.h>
36		61
37	#include <stdio.h>	62	#include <stdio.h>
38		63
39	#include <assert.h>	64	#include <assert.h>
40	#include <errno.h>	65	#include <errno.h>
41	#include <sys/types.h>	66	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	67	#include <time.h>
45		68
		69	#include <signal.h>
		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
46	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
		80	#endif
		81
		82	#ifndef EV_USE_SELECT
		83	# define EV_USE_SELECT 1
		84	#endif
		85
		86	#ifndef EV_USE_POLL
		87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		88	#endif
		89
		90	#ifndef EV_USE_EPOLL
		91	# define EV_USE_EPOLL 0
		92	#endif
		93
		94	#ifndef EV_USE_KQUEUE
		95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
49	# endif	105	# endif
50	#endif	106	#endif
51		107
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
62	#endif	110	#endif
		111
		112	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
		121	# define EV_USE_REALTIME 0
		122	#endif
		123
		124	/**/
63		125
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		129	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
67		130
		131	#ifdef EV_H
		132	# include EV_H
		133	#else
68	#include "ev.h"	134	# include "ev.h"
		135	#endif
		136
		137	#if __GNUC__ >= 3
		138	# define expect(expr,value) __builtin_expect ((expr),(value))
		139	# define inline inline
		140	#else
		141	# define expect(expr,value) (expr)
		142	# define inline static
		143	#endif
		144
		145	#define expect_false(expr) expect ((expr) != 0, 0)
		146	#define expect_true(expr) expect ((expr) != 0, 1)
		147
		148	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		149	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		150
70	typedef struct ev_watcher *W;	151	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	152	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	153	typedef struct ev_watcher_time *WT;
73		154
74	static ev_tstamp now, diff; /* monotonic clock */	155	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77		156
78	static int have_monotonic; /* runtime */	157	#include "ev_win32.c"
79
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		158
84	/*****************************************************************************/	159	/*****************************************************************************/
85		160
86	ev_tstamp	161	static void (*syserr_cb)(const char *msg);
		162
		163	void ev_set_syserr_cb (void (*cb)(const char *msg))
		164	{
		165	syserr_cb = cb;
		166	}
		167
		168	static void
		169	syserr (const char *msg)
		170	{
		171	if (!msg)
		172	msg = "(libev) system error";
		173
		174	if (syserr_cb)
		175	syserr_cb (msg);
		176	else
		177	{
		178	perror (msg);
		179	abort ();
		180	}
		181	}
		182
		183	static void *(*alloc)(void *ptr, long size);
		184
		185	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		186	{
		187	alloc = cb;
		188	}
		189
		190	static void *
		191	ev_realloc (void *ptr, long size)
		192	{
		193	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		194
		195	if (!ptr && size)
		196	{
		197	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		198	abort ();
		199	}
		200
		201	return ptr;
		202	}
		203
		204	#define ev_malloc(size) ev_realloc (0, (size))
		205	#define ev_free(ptr) ev_realloc ((ptr), 0)
		206
		207	/*****************************************************************************/
		208
		209	typedef struct
		210	{
		211	WL head;
		212	unsigned char events;
		213	unsigned char reify;
		214	} ANFD;
		215
		216	typedef struct
		217	{
		218	W w;
		219	int events;
		220	} ANPENDING;
		221
		222	#if EV_MULTIPLICITY
		223
		224	struct ev_loop
		225	{
		226	#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
87	ev_time (void)	248	ev_time (void)
88	{	249	{
89	#if HAVE_REALTIME	250	#if EV_USE_REALTIME
90	struct timespec ts;	251	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	252	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	253	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	254	#else
94	struct timeval tv;	255	struct timeval tv;
95	gettimeofday (&tv, 0);	256	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	257	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	258	#endif
98	}	259	}
99		260
100	static ev_tstamp	261	inline ev_tstamp
101	get_clock (void)	262	get_clock (void)
102	{	263	{
103	#if HAVE_MONOTONIC	264	#if EV_USE_MONOTONIC
104	if (have_monotonic)	265	if (expect_true (have_monotonic))
105	{	266	{
106	struct timespec ts;	267	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	268	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	269	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	270	}
110	#endif	271	#endif
111		272
112	return ev_time ();	273	return ev_time ();
113	}	274	}
114		275
		276	ev_tstamp
		277	ev_now (EV_P)
		278	{
		279	return rt_now;
		280	}
		281
		282	#define array_roundsize(type,n) ((n) | 4 & ~3)
		283
115	#define array_needsize(base,cur,cnt,init) \	284	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	285	if (expect_false ((cnt) > cur)) \
117	{ \	286	{ \
118	int newcnt = cur; \	287	int newcnt = cur; \
119	do \	288	do \
120	{ \	289	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	290	newcnt = array_roundsize (type, newcnt << 1); \
122	} \	291	} \
123	while ((cnt) > newcnt); \	292	while ((cnt) > newcnt); \
124	\	293	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	294	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
126	init (base + cur, newcnt - cur); \	295	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	296	cur = newcnt; \
128	}	297	}
		298
		299	#define array_slim(type,stem) \
		300	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		301	{ \
		302	stem ## max = array_roundsize (stem ## cnt >> 1); \
		303	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		304	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		305	}
		306
		307	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		308	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		309	#define array_free_microshit(stem) \
		310	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		311
		312	#define array_free(stem, idx) \
		313	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
129		314
130	/*****************************************************************************/	315	/*****************************************************************************/
131		316
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	317	static void
145	anfds_init (ANFD *base, int count)	318	anfds_init (ANFD *base, int count)
146	{	319	{
147	while (count--)	320	while (count--)
148	{	321	{
149	base->head = 0;	322	base->head = 0;
150	base->wev = base->rev = EV_NONE;	323	base->events = EV_NONE;
		324	base->reify = 0;
		325
151	++base;	326	++base;
152	}	327	}
153	}	328	}
154		329
155	typedef struct	330	void
		331	ev_feed_event (EV_P_ void *w, int revents)
156	{	332	{
157	W w;	333	W w_ = (W)w;
158	int events;
159	} ANPENDING;
160		334
161	static ANPENDING *pendings;	335	if (w_->pending)
162	static int pendingmax, pendingcnt;
163
164	static void
165	event (W w, int events)
166	{
167	if (w->active)
168	{	336	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	337	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		338	return;
173	}	339	}
174	}
175		340
		341	w_->pending = ++pendingcnt [ABSPRI (w_)];
		342	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
		343	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		344	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		345	}
		346
176	static void	347	static void
		348	queue_events (EV_P_ W *events, int eventcnt, int type)
		349	{
		350	int i;
		351
		352	for (i = 0; i < eventcnt; ++i)
		353	ev_feed_event (EV_A_ events [i], type);
		354	}
		355
		356	inline void
177	fd_event (int fd, int events)	357	fd_event (EV_P_ int fd, int revents)
178	{	358	{
179	ANFD *anfd = anfds + fd;	359	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	360	struct ev_io *w;
181		361
182	for (w = anfd->head; w; w = w->next)	362	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
183	{	363	{
184	int ev = w->events & events;	364	int ev = w->events & revents;
185		365
186	if (ev)	366	if (ev)
187	event ((W)w, ev);	367	ev_feed_event (EV_A_ (W)w, ev);
188	}	368	}
189	}	369	}
190		370
		371	void
		372	ev_feed_fd_event (EV_P_ int fd, int revents)
		373	{
		374	fd_event (EV_A_ fd, revents);
		375	}
		376
		377	/*****************************************************************************/
		378
191	static void	379	static void
192	queue_events (W *events, int eventcnt, int type)	380	fd_reify (EV_P)
193	{	381	{
194	int i;	382	int i;
195		383
196	for (i = 0; i < eventcnt; ++i)	384	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	385	{
		386	int fd = fdchanges [i];
		387	ANFD *anfd = anfds + fd;
		388	struct ev_io *w;
		389
		390	int events = 0;
		391
		392	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		393	events |= w->events;
		394
		395	anfd->reify = 0;
		396
		397	method_modify (EV_A_ fd, anfd->events, events);
		398	anfd->events = events;
		399	}
		400
		401	fdchangecnt = 0;
		402	}
		403
		404	static void
		405	fd_change (EV_P_ int fd)
		406	{
		407	if (anfds [fd].reify)
		408	return;
		409
		410	anfds [fd].reify = 1;
		411
		412	++fdchangecnt;
		413	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		414	fdchanges [fdchangecnt - 1] = fd;
		415	}
		416
		417	static void
		418	fd_kill (EV_P_ int fd)
		419	{
		420	struct ev_io *w;
		421
		422	while ((w = (struct ev_io *)anfds [fd].head))
		423	{
		424	ev_io_stop (EV_A_ w);
		425	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		426	}
		427	}
		428
		429	static int
		430	fd_valid (int fd)
		431	{
		432	#ifdef WIN32
		433	return !!win32_get_osfhandle (fd);
		434	#else
		435	return fcntl (fd, F_GETFD) != -1;
		436	#endif
198	}	437	}
199		438
200	/* called on EBADF to verify fds */	439	/* called on EBADF to verify fds */
201	static void	440	static void
202	fd_recheck ()	441	fd_ebadf (EV_P)
203	{	442	{
204	int fd;	443	int fd;
205		444
206	for (fd = 0; fd < anfdmax; ++fd)	445	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	446	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	447	if (!fd_valid (fd) == -1 && errno == EBADF)
209	while (anfds [fd].head)	448	fd_kill (EV_A_ fd);
210	evio_stop (anfds [fd].head);	449	}
		450
		451	/* called on ENOMEM in select/poll to kill some fds and retry */
		452	static void
		453	fd_enomem (EV_P)
		454	{
		455	int fd;
		456
		457	for (fd = anfdmax; fd--; )
		458	if (anfds [fd].events)
		459	{
		460	fd_kill (EV_A_ fd);
		461	return;
		462	}
		463	}
		464
		465	/* usually called after fork if method needs to re-arm all fds from scratch */
		466	static void
		467	fd_rearm_all (EV_P)
		468	{
		469	int fd;
		470
		471	/* this should be highly optimised to not do anything but set a flag */
		472	for (fd = 0; fd < anfdmax; ++fd)
		473	if (anfds [fd].events)
		474	{
		475	anfds [fd].events = 0;
		476	fd_change (EV_A_ fd);
		477	}
211	}	478	}
212		479
213	/*****************************************************************************/	480	/*****************************************************************************/
214		481
215	static struct ev_timer **timers;
216	static int timermax, timercnt;
217
218	static struct ev_periodic **periodics;
219	static int periodicmax, periodiccnt;
220
221	static void	482	static void
222	upheap (WT *timers, int k)	483	upheap (WT *heap, int k)
223	{	484	{
224	WT w = timers [k];	485	WT w = heap [k];
225		486
226	while (k && timers [k >> 1]->at > w->at)	487	while (k && heap [k >> 1]->at > w->at)
227	{	488	{
228	timers [k] = timers [k >> 1];	489	heap [k] = heap [k >> 1];
229	timers [k]->active = k + 1;	490	((W)heap [k])->active = k + 1;
230	k >>= 1;	491	k >>= 1;
231	}	492	}
232		493
233	timers [k] = w;	494	heap [k] = w;
234	timers [k]->active = k + 1;	495	((W)heap [k])->active = k + 1;
235		496
236	}	497	}
237		498
238	static void	499	static void
239	downheap (WT *timers, int N, int k)	500	downheap (WT *heap, int N, int k)
240	{	501	{
241	WT w = timers [k];	502	WT w = heap [k];
242		503
243	while (k < (N >> 1))	504	while (k < (N >> 1))
244	{	505	{
245	int j = k << 1;	506	int j = k << 1;
246		507
247	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	508	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
248	++j;	509	++j;
249		510
250	if (w->at <= timers [j]->at)	511	if (w->at <= heap [j]->at)
251	break;	512	break;
252		513
253	timers [k] = timers [j];	514	heap [k] = heap [j];
254	timers [k]->active = k + 1;	515	((W)heap [k])->active = k + 1;
255	k = j;	516	k = j;
256	}	517	}
257		518
258	timers [k] = w;	519	heap [k] = w;
259	timers [k]->active = k + 1;	520	((W)heap [k])->active = k + 1;
		521	}
		522
		523	inline void
		524	adjustheap (WT *heap, int N, int k, ev_tstamp at)
		525	{
		526	ev_tstamp old_at = heap [k]->at;
		527	heap [k]->at = at;
		528
		529	if (old_at < at)
		530	downheap (heap, N, k);
		531	else
		532	upheap (heap, k);
260	}	533	}
261		534
262	/*****************************************************************************/	535	/*****************************************************************************/
263		536
264	typedef struct	537	typedef struct
265	{	538	{
266	struct ev_signal *head;	539	WL head;
267	sig_atomic_t gotsig;	540	sig_atomic_t volatile gotsig;
268	} ANSIG;	541	} ANSIG;
269		542
270	static ANSIG *signals;	543	static ANSIG *signals;
271	static int signalmax;	544	static int signalmax;
272		545
273	static int sigpipe [2];	546	static int sigpipe [2];
274	static sig_atomic_t gotsig;	547	static sig_atomic_t volatile gotsig;
275	static struct ev_io sigev;	548	static struct ev_io sigev;
276		549
277	static void	550	static void
278	signals_init (ANSIG *base, int count)	551	signals_init (ANSIG *base, int count)
279	{	552	{
280	while (count--)	553	while (count--)
281	{	554	{
282	base->head = 0;	555	base->head = 0;
283	base->gotsig = 0;	556	base->gotsig = 0;
		557
284	++base;	558	++base;
285	}	559	}
286	}	560	}
287		561
288	static void	562	static void
289	sighandler (int signum)	563	sighandler (int signum)
290	{	564	{
		565	#if WIN32
		566	signal (signum, sighandler);
		567	#endif
		568
291	signals [signum - 1].gotsig = 1;	569	signals [signum - 1].gotsig = 1;
292		570
293	if (!gotsig)	571	if (!gotsig)
294	{	572	{
		573	int old_errno = errno;
295	gotsig = 1;	574	gotsig = 1;
		575	#ifdef WIN32
		576	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		577	#else
296	write (sigpipe [1], &gotsig, 1);	578	write (sigpipe [1], &signum, 1);
		579	#endif
		580	errno = old_errno;
297	}	581	}
298	}	582	}
299		583
		584	void
		585	ev_feed_signal_event (EV_P_ int signum)
		586	{
		587	WL w;
		588
		589	#if EV_MULTIPLICITY
		590	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		591	#endif
		592
		593	--signum;
		594
		595	if (signum < 0 || signum >= signalmax)
		596	return;
		597
		598	signals [signum].gotsig = 0;
		599
		600	for (w = signals [signum].head; w; w = w->next)
		601	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		602	}
		603
300	static void	604	static void
301	sigcb (struct ev_io *iow, int revents)	605	sigcb (EV_P_ struct ev_io *iow, int revents)
302	{	606	{
303	struct ev_signal *w;
304	int sig;	607	int signum;
305		608
		609	#ifdef WIN32
		610	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		611	#else
		612	read (sigpipe [0], &revents, 1);
		613	#endif
306	gotsig = 0;	614	gotsig = 0;
307	read (sigpipe [0], &revents, 1);
308		615
309	for (sig = signalmax; sig--; )	616	for (signum = signalmax; signum--; )
310	if (signals [sig].gotsig)	617	if (signals [signum].gotsig)
311	{	618	ev_feed_signal_event (EV_A_ signum + 1);
312	signals [sig].gotsig = 0;
313
314	for (w = signals [sig].head; w; w = w->next)
315	event ((W)w, EV_SIGNAL);
316	}
317	}	619	}
318		620
319	static void	621	static void
320	siginit (void)	622	siginit (EV_P)
321	{	623	{
		624	#ifndef WIN32
322	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	625	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
323	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	626	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
324		627
325	/* rather than sort out wether we really need nb, set it */	628	/* rather than sort out wether we really need nb, set it */
326	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	629	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
327	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	630	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		631	#endif
328		632
329	evio_set (&sigev, sigpipe [0], EV_READ);	633	ev_io_set (&sigev, sigpipe [0], EV_READ);
330	evio_start (&sigev);	634	ev_io_start (EV_A_ &sigev);
		635	ev_unref (EV_A); /* child watcher should not keep loop alive */
331	}	636	}
332		637
333	/*****************************************************************************/	638	/*****************************************************************************/
334		639
335	static struct ev_idle **idles;
336	static int idlemax, idlecnt;
337
338	static struct ev_prepare **prepares;
339	static int preparemax, preparecnt;
340
341	static struct ev_check **checks;
342	static int checkmax, checkcnt;
343
344	/*****************************************************************************/
345
346	static struct ev_child *childs [PID_HASHSIZE];	640	static struct ev_child *childs [PID_HASHSIZE];
		641
		642	#ifndef WIN32
		643
347	static struct ev_signal childev;	644	static struct ev_signal childev;
348		645
349	#ifndef WCONTINUED	646	#ifndef WCONTINUED
350	# define WCONTINUED 0	647	# define WCONTINUED 0
351	#endif	648	#endif
352		649
353	static void	650	static void
354	childcb (struct ev_signal *sw, int revents)	651	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
355	{	652	{
356	struct ev_child *w;	653	struct ev_child *w;
		654
		655	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		656	if (w->pid == pid || !w->pid)
		657	{
		658	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		659	w->rpid = pid;
		660	w->rstatus = status;
		661	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		662	}
		663	}
		664
		665	static void
		666	childcb (EV_P_ struct ev_signal *sw, int revents)
		667	{
357	int pid, status;	668	int pid, status;
358		669
359	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	670	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
360	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	671	{
361	if (w->pid == pid || w->pid == -1)	672	/* make sure we are called again until all childs have been reaped */
362	{	673	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
363	w->status = status;	674
364	event ((W)w, EV_CHILD);	675	child_reap (EV_A_ sw, pid, pid, status);
365	}	676	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		677	}
366	}	678	}
		679
		680	#endif
367		681
368	/*****************************************************************************/	682	/*****************************************************************************/
369		683
		684	#if EV_USE_KQUEUE
		685	# include "ev_kqueue.c"
		686	#endif
370	#if HAVE_EPOLL	687	#if EV_USE_EPOLL
371	# include "ev_epoll.c"	688	# include "ev_epoll.c"
372	#endif	689	#endif
		690	#if EV_USE_POLL
		691	# include "ev_poll.c"
		692	#endif
373	#if HAVE_SELECT	693	#if EV_USE_SELECT
374	# include "ev_select.c"	694	# include "ev_select.c"
375	#endif	695	#endif
376		696
377	int ev_init (int flags)	697	int
		698	ev_version_major (void)
378	{	699	{
		700	return EV_VERSION_MAJOR;
		701	}
		702
		703	int
		704	ev_version_minor (void)
		705	{
		706	return EV_VERSION_MINOR;
		707	}
		708
		709	/* return true if we are running with elevated privileges and should ignore env variables */
		710	static int
		711	enable_secure (void)
		712	{
		713	#ifdef WIN32
		714	return 0;
		715	#else
		716	return getuid () != geteuid ()
		717	|| getgid () != getegid ();
		718	#endif
		719	}
		720
		721	int
		722	ev_method (EV_P)
		723	{
		724	return method;
		725	}
		726
		727	static void
		728	loop_init (EV_P_ int methods)
		729	{
379	if (!ev_method)	730	if (!method)
380	{	731	{
381	#if HAVE_MONOTONIC	732	#if EV_USE_MONOTONIC
382	{	733	{
383	struct timespec ts;	734	struct timespec ts;
384	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	735	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
385	have_monotonic = 1;	736	have_monotonic = 1;
386	}	737	}
387	#endif	738	#endif
388		739
389	ev_now = ev_time ();	740	rt_now = ev_time ();
390	now = get_clock ();	741	mn_now = get_clock ();
		742	now_floor = mn_now;
391	diff = ev_now - now;	743	rtmn_diff = rt_now - mn_now;
392		744
		745	if (methods == EVMETHOD_AUTO)
		746	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		747	methods = atoi (getenv ("LIBEV_METHODS"));
		748	else
		749	methods = EVMETHOD_ANY;
		750
		751	method = 0;
		752	#if EV_USE_WIN32
		753	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		754	#endif
		755	#if EV_USE_KQUEUE
		756	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		757	#endif
		758	#if EV_USE_EPOLL
		759	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		760	#endif
		761	#if EV_USE_POLL
		762	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		763	#endif
		764	#if EV_USE_SELECT
		765	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		766	#endif
		767
		768	ev_init (&sigev, sigcb);
		769	ev_set_priority (&sigev, EV_MAXPRI);
		770	}
		771	}
		772
		773	void
		774	loop_destroy (EV_P)
		775	{
		776	int i;
		777
		778	#if EV_USE_WIN32
		779	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		780	#endif
		781	#if EV_USE_KQUEUE
		782	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		783	#endif
		784	#if EV_USE_EPOLL
		785	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		786	#endif
		787	#if EV_USE_POLL
		788	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		789	#endif
		790	#if EV_USE_SELECT
		791	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		792	#endif
		793
		794	for (i = NUMPRI; i--; )
		795	array_free (pending, [i]);
		796
		797	/* have to use the microsoft-never-gets-it-right macro */
		798	array_free_microshit (fdchange);
		799	array_free_microshit (timer);
		800	array_free_microshit (periodic);
		801	array_free_microshit (idle);
		802	array_free_microshit (prepare);
		803	array_free_microshit (check);
		804
		805	method = 0;
		806	}
		807
		808	static void
		809	loop_fork (EV_P)
		810	{
		811	#if EV_USE_EPOLL
		812	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		813	#endif
		814	#if EV_USE_KQUEUE
		815	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		816	#endif
		817
		818	if (ev_is_active (&sigev))
		819	{
		820	/* default loop */
		821
		822	ev_ref (EV_A);
		823	ev_io_stop (EV_A_ &sigev);
		824	close (sigpipe [0]);
		825	close (sigpipe [1]);
		826
		827	while (pipe (sigpipe))
		828	syserr ("(libev) error creating pipe");
		829
		830	siginit (EV_A);
		831	}
		832
		833	postfork = 0;
		834	}
		835
		836	#if EV_MULTIPLICITY
		837	struct ev_loop *
		838	ev_loop_new (int methods)
		839	{
		840	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		841
		842	memset (loop, 0, sizeof (struct ev_loop));
		843
		844	loop_init (EV_A_ methods);
		845
		846	if (ev_method (EV_A))
		847	return loop;
		848
		849	return 0;
		850	}
		851
		852	void
		853	ev_loop_destroy (EV_P)
		854	{
		855	loop_destroy (EV_A);
		856	ev_free (loop);
		857	}
		858
		859	void
		860	ev_loop_fork (EV_P)
		861	{
		862	postfork = 1;
		863	}
		864
		865	#endif
		866
		867	#if EV_MULTIPLICITY
		868	struct ev_loop *
		869	#else
		870	int
		871	#endif
		872	ev_default_loop (int methods)
		873	{
		874	if (sigpipe [0] == sigpipe [1])
393	if (pipe (sigpipe))	875	if (pipe (sigpipe))
394	return 0;	876	return 0;
395		877
396	ev_method = EVMETHOD_NONE;	878	if (!default_loop)
397	#if HAVE_EPOLL	879	{
398	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	880	#if EV_MULTIPLICITY
		881	struct ev_loop *loop = default_loop = &default_loop_struct;
		882	#else
		883	default_loop = 1;
399	#endif	884	#endif
400	#if HAVE_SELECT
401	if (ev_method == EVMETHOD_NONE) select_init (flags);
402	#endif
403		885
		886	loop_init (EV_A_ methods);
		887
404	if (ev_method)	888	if (ev_method (EV_A))
405	{	889	{
406	evw_init (&sigev, sigcb);
407	siginit ();	890	siginit (EV_A);
408		891
		892	#ifndef WIN32
409	evsignal_init (&childev, childcb, SIGCHLD);	893	ev_signal_init (&childev, childcb, SIGCHLD);
		894	ev_set_priority (&childev, EV_MAXPRI);
410	evsignal_start (&childev);	895	ev_signal_start (EV_A_ &childev);
		896	ev_unref (EV_A); /* child watcher should not keep loop alive */
		897	#endif
411	}	898	}
		899	else
		900	default_loop = 0;
412	}	901	}
413		902
414	return ev_method;	903	return default_loop;
		904	}
		905
		906	void
		907	ev_default_destroy (void)
		908	{
		909	#if EV_MULTIPLICITY
		910	struct ev_loop *loop = default_loop;
		911	#endif
		912
		913	#ifndef WIN32
		914	ev_ref (EV_A); /* child watcher */
		915	ev_signal_stop (EV_A_ &childev);
		916	#endif
		917
		918	ev_ref (EV_A); /* signal watcher */
		919	ev_io_stop (EV_A_ &sigev);
		920
		921	close (sigpipe [0]); sigpipe [0] = 0;
		922	close (sigpipe [1]); sigpipe [1] = 0;
		923
		924	loop_destroy (EV_A);
		925	}
		926
		927	void
		928	ev_default_fork (void)
		929	{
		930	#if EV_MULTIPLICITY
		931	struct ev_loop *loop = default_loop;
		932	#endif
		933
		934	if (method)
		935	postfork = 1;
415	}	936	}
416		937
417	/*****************************************************************************/	938	/*****************************************************************************/
418		939
419	void ev_prefork (void)
420	{
421	/* nop */
422	}
423
424	void ev_postfork_parent (void)
425	{
426	/* nop */
427	}
428
429	void ev_postfork_child (void)
430	{
431	#if HAVE_EPOLL
432	if (ev_method == EVMETHOD_EPOLL)
433	epoll_postfork_child ();
434	#endif
435
436	evio_stop (&sigev);
437	close (sigpipe [0]);
438	close (sigpipe [1]);
439	pipe (sigpipe);
440	siginit ();
441	}
442
443	/*****************************************************************************/
444
445	static void	940	static int
446	fd_reify (void)	941	any_pending (EV_P)
447	{	942	{
448	int i;	943	int pri;
449		944
450	for (i = 0; i < fdchangecnt; ++i)	945	for (pri = NUMPRI; pri--; )
451	{	946	if (pendingcnt [pri])
452	int fd = fdchanges [i];	947	return 1;
453	ANFD *anfd = anfds + fd;
454	struct ev_io *w;
455		948
456	int wev = 0;	949	return 0;
457
458	for (w = anfd->head; w; w = w->next)
459	wev |= w->events;
460
461	if (anfd->wev != wev)
462	{
463	method_modify (fd, anfd->wev, wev);
464	anfd->wev = wev;
465	}
466	}
467
468	fdchangecnt = 0;
469	}	950	}
470		951
471	static void	952	static void
472	call_pending ()	953	call_pending (EV_P)
473	{	954	{
		955	int pri;
		956
		957	for (pri = NUMPRI; pri--; )
474	while (pendingcnt)	958	while (pendingcnt [pri])
475	{	959	{
476	ANPENDING *p = pendings + --pendingcnt;	960	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
477		961
478	if (p->w)	962	if (p->w)
479	{	963	{
480	p->w->pending = 0;	964	p->w->pending = 0;
481	p->w->cb (p->w, p->events);	965	EV_CB_INVOKE (p->w, p->events);
482	}	966	}
483	}	967	}
484	}	968	}
485		969
486	static void	970	static void
487	timers_reify ()	971	timers_reify (EV_P)
488	{	972	{
489	while (timercnt && timers [0]->at <= now)	973	while (timercnt && ((WT)timers [0])->at <= mn_now)
490	{	974	{
491	struct ev_timer *w = timers [0];	975	struct ev_timer *w = timers [0];
492		976
493	event ((W)w, EV_TIMEOUT);	977	assert (("inactive timer on timer heap detected", ev_is_active (w)));
494		978
495	/* first reschedule or stop timer */	979	/* first reschedule or stop timer */
496	if (w->repeat)	980	if (w->repeat)
497	{	981	{
		982	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
498	w->at = now + w->repeat;	983	((WT)w)->at = mn_now + w->repeat;
499	assert (("timer timeout in the past, negative repeat?", w->at > now));
500	downheap ((WT *)timers, timercnt, 0);	984	downheap ((WT *)timers, timercnt, 0);
501	}	985	}
502	else	986	else
503	evtimer_stop (w); /* nonrepeating: stop timer */	987	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
504	}
505	}
506		988
		989	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		990	}
		991	}
		992
507	static void	993	static void
508	periodics_reify ()	994	periodics_reify (EV_P)
509	{	995	{
510	while (periodiccnt && periodics [0]->at <= ev_now)	996	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
511	{	997	{
512	struct ev_periodic *w = periodics [0];	998	struct ev_periodic *w = periodics [0];
513		999
		1000	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1001
514	/* first reschedule or stop timer */	1002	/* first reschedule or stop timer */
515	if (w->interval)	1003	if (w->reschedule_cb)
516	{	1004	{
		1005	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
		1006
		1007	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		1008	downheap ((WT *)periodics, periodiccnt, 0);
		1009	}
		1010	else if (w->interval)
		1011	{
517	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1012	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
518	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1013	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
519	downheap ((WT *)periodics, periodiccnt, 0);	1014	downheap ((WT *)periodics, periodiccnt, 0);
520	}	1015	}
521	else	1016	else
522	evperiodic_stop (w); /* nonrepeating: stop timer */	1017	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
523		1018
524	event ((W)w, EV_TIMEOUT);	1019	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
525	}	1020	}
526	}	1021	}
527		1022
528	static void	1023	static void
529	periodics_reschedule (ev_tstamp diff)	1024	periodics_reschedule (EV_P)
530	{	1025	{
531	int i;	1026	int i;
532		1027
533	/* adjust periodics after time jump */	1028	/* adjust periodics after time jump */
534	for (i = 0; i < periodiccnt; ++i)	1029	for (i = 0; i < periodiccnt; ++i)
535	{	1030	{
536	struct ev_periodic *w = periodics [i];	1031	struct ev_periodic *w = periodics [i];
537		1032
		1033	if (w->reschedule_cb)
		1034	((WT)w)->at = w->reschedule_cb (w, rt_now);
538	if (w->interval)	1035	else if (w->interval)
		1036	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1037	}
		1038
		1039	/* now rebuild the heap */
		1040	for (i = periodiccnt >> 1; i--; )
		1041	downheap ((WT *)periodics, periodiccnt, i);
		1042	}
		1043
		1044	inline int
		1045	time_update_monotonic (EV_P)
		1046	{
		1047	mn_now = get_clock ();
		1048
		1049	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1050	{
		1051	rt_now = rtmn_diff + mn_now;
		1052	return 0;
		1053	}
		1054	else
		1055	{
		1056	now_floor = mn_now;
		1057	rt_now = ev_time ();
		1058	return 1;
		1059	}
		1060	}
		1061
		1062	static void
		1063	time_update (EV_P)
		1064	{
		1065	int i;
		1066
		1067	#if EV_USE_MONOTONIC
		1068	if (expect_true (have_monotonic))
		1069	{
		1070	if (time_update_monotonic (EV_A))
539	{	1071	{
540	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1072	ev_tstamp odiff = rtmn_diff;
541		1073
542	if (fabs (diff) >= 1e-4)	1074	for (i = 4; --i; ) /* loop a few times, before making important decisions */
543	{	1075	{
544	evperiodic_stop (w);	1076	rtmn_diff = rt_now - mn_now;
545	evperiodic_start (w);
546		1077
547	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1078	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1079	return; /* all is well */
		1080
		1081	rt_now = ev_time ();
		1082	mn_now = get_clock ();
		1083	now_floor = mn_now;
548	}	1084	}
		1085
		1086	periodics_reschedule (EV_A);
		1087	/* no timer adjustment, as the monotonic clock doesn't jump */
		1088	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
549	}	1089	}
550	}	1090	}
551	}	1091	else
552		1092	#endif
553	static void	1093	{
554	time_update ()
555	{
556	int i;
557
558	ev_now = ev_time ();	1094	rt_now = ev_time ();
559		1095
560	if (have_monotonic)	1096	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
561	{
562	ev_tstamp odiff = diff;
563
564	for (i = 4; --i; ) /* loop a few times, before making important decisions */
565	{	1097	{
566	now = get_clock ();
567	diff = ev_now - now;
568
569	if (fabs (odiff - diff) < MIN_TIMEJUMP)
570	return; /* all is well */
571
572	ev_now = ev_time ();
573	}
574
575	periodics_reschedule (diff - odiff);
576	/* no timer adjustment, as the monotonic clock doesn't jump */
577	}
578	else
579	{
580	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
581	{
582	periodics_reschedule (ev_now - now);	1098	periodics_reschedule (EV_A);
583		1099
584	/* adjust timers. this is easy, as the offset is the same for all */	1100	/* adjust timers. this is easy, as the offset is the same for all */
585	for (i = 0; i < timercnt; ++i)	1101	for (i = 0; i < timercnt; ++i)
586	timers [i]->at += diff;	1102	((WT)timers [i])->at += rt_now - mn_now;
587	}	1103	}
588		1104
589	now = ev_now;	1105	mn_now = rt_now;
590	}	1106	}
591	}	1107	}
592		1108
593	int ev_loop_done;	1109	void
		1110	ev_ref (EV_P)
		1111	{
		1112	++activecnt;
		1113	}
594		1114
		1115	void
		1116	ev_unref (EV_P)
		1117	{
		1118	--activecnt;
		1119	}
		1120
		1121	static int loop_done;
		1122
		1123	void
595	void ev_loop (int flags)	1124	ev_loop (EV_P_ int flags)
596	{	1125	{
597	double block;	1126	double block;
598	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1127	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
599		1128
600	do	1129	do
601	{	1130	{
602	/* queue check watchers (and execute them) */	1131	/* queue check watchers (and execute them) */
603	if (preparecnt)	1132	if (expect_false (preparecnt))
604	{	1133	{
605	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1134	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
606	call_pending ();	1135	call_pending (EV_A);
607	}	1136	}
608		1137
		1138	/* we might have forked, so reify kernel state if necessary */
		1139	if (expect_false (postfork))
		1140	loop_fork (EV_A);
		1141
609	/* update fd-related kernel structures */	1142	/* update fd-related kernel structures */
610	fd_reify ();	1143	fd_reify (EV_A);
611		1144
612	/* calculate blocking time */	1145	/* calculate blocking time */
613		1146
614	/* we only need this for !monotonic clockor timers, but as we basically	1147	/* we only need this for !monotonic clock or timers, but as we basically
615	always have timers, we just calculate it always */	1148	always have timers, we just calculate it always */
		1149	#if EV_USE_MONOTONIC
		1150	if (expect_true (have_monotonic))
		1151	time_update_monotonic (EV_A);
		1152	else
		1153	#endif
		1154	{
616	ev_now = ev_time ();	1155	rt_now = ev_time ();
		1156	mn_now = rt_now;
		1157	}
617		1158
618	if (flags & EVLOOP_NONBLOCK || idlecnt)	1159	if (flags & EVLOOP_NONBLOCK || idlecnt)
619	block = 0.;	1160	block = 0.;
620	else	1161	else
621	{	1162	{
622	block = MAX_BLOCKTIME;	1163	block = MAX_BLOCKTIME;
623		1164
624	if (timercnt)	1165	if (timercnt)
625	{	1166	{
626	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1167	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
627	if (block > to) block = to;	1168	if (block > to) block = to;
628	}	1169	}
629		1170
630	if (periodiccnt)	1171	if (periodiccnt)
631	{	1172	{
632	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1173	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
633	if (block > to) block = to;	1174	if (block > to) block = to;
634	}	1175	}
635		1176
636	if (block < 0.) block = 0.;	1177	if (block < 0.) block = 0.;
637	}	1178	}
638		1179
639	method_poll (block);	1180	method_poll (EV_A_ block);
640		1181
641	/* update ev_now, do magic */	1182	/* update rt_now, do magic */
642	time_update ();	1183	time_update (EV_A);
643		1184
644	/* queue pending timers and reschedule them */	1185	/* queue pending timers and reschedule them */
645	timers_reify (); /* relative timers called last */	1186	timers_reify (EV_A); /* relative timers called last */
646	periodics_reify (); /* absolute timers called first */	1187	periodics_reify (EV_A); /* absolute timers called first */
647		1188
648	/* queue idle watchers unless io or timers are pending */	1189	/* queue idle watchers unless io or timers are pending */
649	if (!pendingcnt)	1190	if (idlecnt && !any_pending (EV_A))
650	queue_events ((W *)idles, idlecnt, EV_IDLE);	1191	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
651		1192
652	/* queue check watchers, to be executed first */	1193	/* queue check watchers, to be executed first */
653	if (checkcnt)	1194	if (checkcnt)
654	queue_events ((W *)checks, checkcnt, EV_CHECK);	1195	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
655		1196
656	call_pending ();	1197	call_pending (EV_A);
657	}	1198	}
658	while (!ev_loop_done);	1199	while (activecnt && !loop_done);
659		1200
660	if (ev_loop_done != 2)	1201	if (loop_done != 2)
661	ev_loop_done = 0;	1202	loop_done = 0;
		1203	}
		1204
		1205	void
		1206	ev_unloop (EV_P_ int how)
		1207	{
		1208	loop_done = how;
662	}	1209	}
663		1210
664	/*****************************************************************************/	1211	/*****************************************************************************/
665		1212
666	static void	1213	inline void
667	wlist_add (WL *head, WL elem)	1214	wlist_add (WL *head, WL elem)
668	{	1215	{
669	elem->next = *head;	1216	elem->next = *head;
670	*head = elem;	1217	*head = elem;
671	}	1218	}
672		1219
673	static void	1220	inline void
674	wlist_del (WL *head, WL elem)	1221	wlist_del (WL *head, WL elem)
675	{	1222	{
676	while (*head)	1223	while (*head)
677	{	1224	{
678	if (*head == elem)	1225	if (*head == elem)
…		…
683		1230
684	head = &(*head)->next;	1231	head = &(*head)->next;
685	}	1232	}
686	}	1233	}
687		1234
688	static void	1235	inline void
689	ev_clear (W w)	1236	ev_clear_pending (EV_P_ W w)
690	{	1237	{
691	if (w->pending)	1238	if (w->pending)
692	{	1239	{
693	pendings [w->pending - 1].w = 0;	1240	pendings [ABSPRI (w)][w->pending - 1].w = 0;
694	w->pending = 0;	1241	w->pending = 0;
695	}	1242	}
696	}	1243	}
697		1244
698	static void	1245	inline void
699	ev_start (W w, int active)	1246	ev_start (EV_P_ W w, int active)
700	{	1247	{
		1248	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1249	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1250
701	w->active = active;	1251	w->active = active;
		1252	ev_ref (EV_A);
702	}	1253	}
703		1254
704	static void	1255	inline void
705	ev_stop (W w)	1256	ev_stop (EV_P_ W w)
706	{	1257	{
		1258	ev_unref (EV_A);
707	w->active = 0;	1259	w->active = 0;
708	}	1260	}
709		1261
710	/*****************************************************************************/	1262	/*****************************************************************************/
711		1263
712	void	1264	void
713	evio_start (struct ev_io *w)	1265	ev_io_start (EV_P_ struct ev_io *w)
714	{	1266	{
		1267	int fd = w->fd;
		1268
715	if (ev_is_active (w))	1269	if (ev_is_active (w))
716	return;	1270	return;
717		1271
718	int fd = w->fd;	1272	assert (("ev_io_start called with negative fd", fd >= 0));
719		1273
720	ev_start ((W)w, 1);	1274	ev_start (EV_A_ (W)w, 1);
721	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1275	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
722	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1276	wlist_add ((WL *)&anfds[fd].head, (WL)w);
723		1277
724	++fdchangecnt;	1278	fd_change (EV_A_ fd);
725	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
726	fdchanges [fdchangecnt - 1] = fd;
727	}	1279	}
728		1280
729	void	1281	void
730	evio_stop (struct ev_io *w)	1282	ev_io_stop (EV_P_ struct ev_io *w)
731	{	1283	{
732	ev_clear ((W)w);	1284	ev_clear_pending (EV_A_ (W)w);
733	if (!ev_is_active (w))	1285	if (!ev_is_active (w))
734	return;	1286	return;
735		1287
736	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1288	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
737	ev_stop ((W)w);	1289	ev_stop (EV_A_ (W)w);
738		1290
739	++fdchangecnt;	1291	fd_change (EV_A_ w->fd);
740	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
741	fdchanges [fdchangecnt - 1] = w->fd;
742	}	1292	}
743		1293
744	void	1294	void
745	evtimer_start (struct ev_timer *w)	1295	ev_timer_start (EV_P_ struct ev_timer *w)
746	{	1296	{
747	if (ev_is_active (w))	1297	if (ev_is_active (w))
748	return;	1298	return;
749		1299
750	w->at += now;	1300	((WT)w)->at += mn_now;
751		1301
752	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1302	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
753		1303
754	ev_start ((W)w, ++timercnt);	1304	ev_start (EV_A_ (W)w, ++timercnt);
755	array_needsize (timers, timermax, timercnt, );	1305	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
756	timers [timercnt - 1] = w;	1306	timers [timercnt - 1] = w;
757	upheap ((WT *)timers, timercnt - 1);	1307	upheap ((WT *)timers, timercnt - 1);
758	}
759		1308
		1309	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1310	}
		1311
760	void	1312	void
761	evtimer_stop (struct ev_timer *w)	1313	ev_timer_stop (EV_P_ struct ev_timer *w)
762	{	1314	{
763	ev_clear ((W)w);	1315	ev_clear_pending (EV_A_ (W)w);
764	if (!ev_is_active (w))	1316	if (!ev_is_active (w))
765	return;	1317	return;
766		1318
		1319	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1320
767	if (w->active < timercnt--)	1321	if (((W)w)->active < timercnt--)
768	{	1322	{
769	timers [w->active - 1] = timers [timercnt];	1323	timers [((W)w)->active - 1] = timers [timercnt];
770	downheap ((WT *)timers, timercnt, w->active - 1);	1324	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
771	}	1325	}
772		1326
773	w->at = w->repeat;	1327	((WT)w)->at = w->repeat;
774		1328
775	ev_stop ((W)w);	1329	ev_stop (EV_A_ (W)w);
776	}	1330	}
777		1331
778	void	1332	void
779	evtimer_again (struct ev_timer *w)	1333	ev_timer_again (EV_P_ struct ev_timer *w)
780	{	1334	{
781	if (ev_is_active (w))	1335	if (ev_is_active (w))
782	{	1336	{
783	if (w->repeat)	1337	if (w->repeat)
784	{
785	w->at = now + w->repeat;
786	downheap ((WT *)timers, timercnt, w->active - 1);	1338	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
787	}
788	else	1339	else
789	evtimer_stop (w);	1340	ev_timer_stop (EV_A_ w);
790	}	1341	}
791	else if (w->repeat)	1342	else if (w->repeat)
792	evtimer_start (w);	1343	ev_timer_start (EV_A_ w);
793	}	1344	}
794		1345
795	void	1346	void
796	evperiodic_start (struct ev_periodic *w)	1347	ev_periodic_start (EV_P_ struct ev_periodic *w)
797	{	1348	{
798	if (ev_is_active (w))	1349	if (ev_is_active (w))
799	return;	1350	return;
800		1351
801	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1352	if (w->reschedule_cb)
802		1353	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1354	else if (w->interval)
		1355	{
		1356	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
803	/* this formula differs from the one in periodic_reify because we do not always round up */	1357	/* this formula differs from the one in periodic_reify because we do not always round up */
804	if (w->interval)
805	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1358	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1359	}
806		1360
807	ev_start ((W)w, ++periodiccnt);	1361	ev_start (EV_A_ (W)w, ++periodiccnt);
808	array_needsize (periodics, periodicmax, periodiccnt, );	1362	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
809	periodics [periodiccnt - 1] = w;	1363	periodics [periodiccnt - 1] = w;
810	upheap ((WT *)periodics, periodiccnt - 1);	1364	upheap ((WT *)periodics, periodiccnt - 1);
811	}
812		1365
		1366	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1367	}
		1368
813	void	1369	void
814	evperiodic_stop (struct ev_periodic *w)	1370	ev_periodic_stop (EV_P_ struct ev_periodic *w)
815	{	1371	{
816	ev_clear ((W)w);	1372	ev_clear_pending (EV_A_ (W)w);
817	if (!ev_is_active (w))	1373	if (!ev_is_active (w))
818	return;	1374	return;
819		1375
		1376	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1377
820	if (w->active < periodiccnt--)	1378	if (((W)w)->active < periodiccnt--)
821	{	1379	{
822	periodics [w->active - 1] = periodics [periodiccnt];	1380	periodics [((W)w)->active - 1] = periodics [periodiccnt];
823	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1381	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
824	}	1382	}
825		1383
826	ev_stop ((W)w);	1384	ev_stop (EV_A_ (W)w);
827	}	1385	}
828		1386
829	void	1387	void
830	evsignal_start (struct ev_signal *w)	1388	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1389	{
		1390	/* TODO: use adjustheap and recalculation */
		1391	ev_periodic_stop (EV_A_ w);
		1392	ev_periodic_start (EV_A_ w);
		1393	}
		1394
		1395	void
		1396	ev_idle_start (EV_P_ struct ev_idle *w)
831	{	1397	{
832	if (ev_is_active (w))	1398	if (ev_is_active (w))
833	return;	1399	return;
834		1400
		1401	ev_start (EV_A_ (W)w, ++idlecnt);
		1402	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1403	idles [idlecnt - 1] = w;
		1404	}
		1405
		1406	void
		1407	ev_idle_stop (EV_P_ struct ev_idle *w)
		1408	{
		1409	ev_clear_pending (EV_A_ (W)w);
		1410	if (ev_is_active (w))
		1411	return;
		1412
		1413	idles [((W)w)->active - 1] = idles [--idlecnt];
		1414	ev_stop (EV_A_ (W)w);
		1415	}
		1416
		1417	void
		1418	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1419	{
		1420	if (ev_is_active (w))
		1421	return;
		1422
		1423	ev_start (EV_A_ (W)w, ++preparecnt);
		1424	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1425	prepares [preparecnt - 1] = w;
		1426	}
		1427
		1428	void
		1429	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1430	{
		1431	ev_clear_pending (EV_A_ (W)w);
		1432	if (ev_is_active (w))
		1433	return;
		1434
		1435	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1436	ev_stop (EV_A_ (W)w);
		1437	}
		1438
		1439	void
		1440	ev_check_start (EV_P_ struct ev_check *w)
		1441	{
		1442	if (ev_is_active (w))
		1443	return;
		1444
		1445	ev_start (EV_A_ (W)w, ++checkcnt);
		1446	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1447	checks [checkcnt - 1] = w;
		1448	}
		1449
		1450	void
		1451	ev_check_stop (EV_P_ struct ev_check *w)
		1452	{
		1453	ev_clear_pending (EV_A_ (W)w);
		1454	if (ev_is_active (w))
		1455	return;
		1456
		1457	checks [((W)w)->active - 1] = checks [--checkcnt];
		1458	ev_stop (EV_A_ (W)w);
		1459	}
		1460
		1461	#ifndef SA_RESTART
		1462	# define SA_RESTART 0
		1463	#endif
		1464
		1465	void
		1466	ev_signal_start (EV_P_ struct ev_signal *w)
		1467	{
		1468	#if EV_MULTIPLICITY
		1469	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1470	#endif
		1471	if (ev_is_active (w))
		1472	return;
		1473
		1474	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1475
835	ev_start ((W)w, 1);	1476	ev_start (EV_A_ (W)w, 1);
836	array_needsize (signals, signalmax, w->signum, signals_init);	1477	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
837	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1478	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
838		1479
839	if (!w->next)	1480	if (!((WL)w)->next)
840	{	1481	{
		1482	#if WIN32
		1483	signal (w->signum, sighandler);
		1484	#else
841	struct sigaction sa;	1485	struct sigaction sa;
842	sa.sa_handler = sighandler;	1486	sa.sa_handler = sighandler;
843	sigfillset (&sa.sa_mask);	1487	sigfillset (&sa.sa_mask);
844	sa.sa_flags = 0;	1488	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
845	sigaction (w->signum, &sa, 0);	1489	sigaction (w->signum, &sa, 0);
		1490	#endif
846	}	1491	}
847	}	1492	}
848		1493
849	void	1494	void
850	evsignal_stop (struct ev_signal *w)	1495	ev_signal_stop (EV_P_ struct ev_signal *w)
851	{	1496	{
852	ev_clear ((W)w);	1497	ev_clear_pending (EV_A_ (W)w);
853	if (!ev_is_active (w))	1498	if (!ev_is_active (w))
854	return;	1499	return;
855		1500
856	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1501	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
857	ev_stop ((W)w);	1502	ev_stop (EV_A_ (W)w);
858		1503
859	if (!signals [w->signum - 1].head)	1504	if (!signals [w->signum - 1].head)
860	signal (w->signum, SIG_DFL);	1505	signal (w->signum, SIG_DFL);
861	}	1506	}
862		1507
863	void evidle_start (struct ev_idle *w)	1508	void
		1509	ev_child_start (EV_P_ struct ev_child *w)
864	{	1510	{
		1511	#if EV_MULTIPLICITY
		1512	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1513	#endif
865	if (ev_is_active (w))	1514	if (ev_is_active (w))
866	return;	1515	return;
867		1516
868	ev_start ((W)w, ++idlecnt);	1517	ev_start (EV_A_ (W)w, 1);
869	array_needsize (idles, idlemax, idlecnt, );	1518	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
870	idles [idlecnt - 1] = w;
871	}	1519	}
872		1520
873	void evidle_stop (struct ev_idle *w)	1521	void
		1522	ev_child_stop (EV_P_ struct ev_child *w)
874	{	1523	{
875	ev_clear ((W)w);	1524	ev_clear_pending (EV_A_ (W)w);
876	if (ev_is_active (w))	1525	if (ev_is_active (w))
877	return;	1526	return;
878		1527
879	idles [w->active - 1] = idles [--idlecnt];
880	ev_stop ((W)w);
881	}
882
883	void evprepare_start (struct ev_prepare *w)
884	{
885	if (ev_is_active (w))
886	return;
887
888	ev_start ((W)w, ++preparecnt);
889	array_needsize (prepares, preparemax, preparecnt, );
890	prepares [preparecnt - 1] = w;
891	}
892
893	void evprepare_stop (struct ev_prepare *w)
894	{
895	ev_clear ((W)w);
896	if (ev_is_active (w))
897	return;
898
899	prepares [w->active - 1] = prepares [--preparecnt];
900	ev_stop ((W)w);
901	}
902
903	void evcheck_start (struct ev_check *w)
904	{
905	if (ev_is_active (w))
906	return;
907
908	ev_start ((W)w, ++checkcnt);
909	array_needsize (checks, checkmax, checkcnt, );
910	checks [checkcnt - 1] = w;
911	}
912
913	void evcheck_stop (struct ev_check *w)
914	{
915	ev_clear ((W)w);
916	if (ev_is_active (w))
917	return;
918
919	checks [w->active - 1] = checks [--checkcnt];
920	ev_stop ((W)w);
921	}
922
923	void evchild_start (struct ev_child *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, 1);
929	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	}
931
932	void evchild_stop (struct ev_child *w)
933	{
934	ev_clear ((W)w);
935	if (ev_is_active (w))
936	return;
937
938	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1528	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
939	ev_stop ((W)w);	1529	ev_stop (EV_A_ (W)w);
940	}	1530	}
941		1531
942	/*****************************************************************************/	1532	/*****************************************************************************/
943		1533
944	struct ev_once	1534	struct ev_once
…		…
948	void (*cb)(int revents, void *arg);	1538	void (*cb)(int revents, void *arg);
949	void *arg;	1539	void *arg;
950	};	1540	};
951		1541
952	static void	1542	static void
953	once_cb (struct ev_once *once, int revents)	1543	once_cb (EV_P_ struct ev_once *once, int revents)
954	{	1544	{
955	void (*cb)(int revents, void *arg) = once->cb;	1545	void (*cb)(int revents, void *arg) = once->cb;
956	void *arg = once->arg;	1546	void *arg = once->arg;
957		1547
958	evio_stop (&once->io);	1548	ev_io_stop (EV_A_ &once->io);
959	evtimer_stop (&once->to);	1549	ev_timer_stop (EV_A_ &once->to);
960	free (once);	1550	ev_free (once);
961		1551
962	cb (revents, arg);	1552	cb (revents, arg);
963	}	1553	}
964		1554
965	static void	1555	static void
966	once_cb_io (struct ev_io *w, int revents)	1556	once_cb_io (EV_P_ struct ev_io *w, int revents)
967	{	1557	{
968	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1558	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
969	}	1559	}
970		1560
971	static void	1561	static void
972	once_cb_to (struct ev_timer *w, int revents)	1562	once_cb_to (EV_P_ struct ev_timer *w, int revents)
973	{	1563	{
974	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1564	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
975	}	1565	}
976		1566
977	void	1567	void
978	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1568	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
979	{	1569	{
980	struct ev_once *once = malloc (sizeof (struct ev_once));	1570	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
981		1571
982	if (!once)	1572	if (!once)
983	cb (EV_ERROR, arg);	1573	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
984	else	1574	else
985	{	1575	{
986	once->cb = cb;	1576	once->cb = cb;
987	once->arg = arg;	1577	once->arg = arg;
988		1578
989	evw_init (&once->io, once_cb_io);	1579	ev_init (&once->io, once_cb_io);
990
991	if (fd >= 0)	1580	if (fd >= 0)
992	{	1581	{
993	evio_set (&once->io, fd, events);	1582	ev_io_set (&once->io, fd, events);
994	evio_start (&once->io);	1583	ev_io_start (EV_A_ &once->io);
995	}	1584	}
996		1585
997	evw_init (&once->to, once_cb_to);	1586	ev_init (&once->to, once_cb_to);
998
999	if (timeout >= 0.)	1587	if (timeout >= 0.)
1000	{	1588	{
1001	evtimer_set (&once->to, timeout, 0.);	1589	ev_timer_set (&once->to, timeout, 0.);
1002	evtimer_start (&once->to);	1590	ev_timer_start (EV_A_ &once->to);
1003	}	1591	}
1004	}	1592	}
1005	}	1593	}
1006		1594
1007	/*****************************************************************************/
1008
1009	#if 0
1010
1011	struct ev_io wio;
1012
1013	static void
1014	sin_cb (struct ev_io *w, int revents)
1015	{
1016	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1017	}
1018
1019	static void
1020	ocb (struct ev_timer *w, int revents)
1021	{
1022	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1023	evtimer_stop (w);
1024	evtimer_start (w);
1025	}
1026
1027	static void
1028	scb (struct ev_signal *w, int revents)
1029	{
1030	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1031	evio_stop (&wio);
1032	evio_start (&wio);
1033	}
1034
1035	static void
1036	gcb (struct ev_signal *w, int revents)
1037	{
1038	fprintf (stderr, "generic %x\n", revents);
1039
1040	}
1041
1042	int main (void)
1043	{
1044	ev_init (0);
1045
1046	evio_init (&wio, sin_cb, 0, EV_READ);
1047	evio_start (&wio);
1048
1049	struct ev_timer t[10000];
1050
1051	#if 0
1052	int i;
1053	for (i = 0; i < 10000; ++i)
1054	{
1055	struct ev_timer *w = t + i;
1056	evw_init (w, ocb, i);
1057	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1058	evtimer_start (w);
1059	if (drand48 () < 0.5)
1060	evtimer_stop (w);
1061	}
1062	#endif
1063
1064	struct ev_timer t1;
1065	evtimer_init (&t1, ocb, 5, 10);
1066	evtimer_start (&t1);
1067
1068	struct ev_signal sig;
1069	evsignal_init (&sig, scb, SIGQUIT);
1070	evsignal_start (&sig);
1071
1072	struct ev_check cw;
1073	evcheck_init (&cw, gcb);
1074	evcheck_start (&cw);
1075
1076	struct ev_idle iw;
1077	evidle_init (&iw, gcb);
1078	evidle_start (&iw);
1079
1080	ev_loop (0);
1081
1082	return 0;
1083	}
1084
1085	#endif
1086
1087
1088
1089

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