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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 1.88 by root, Sat Nov 10 04:40:27 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	# define EV_USE_MONOTONIC 1
		41	# define EV_USE_REALTIME 1
		42	# endif
		43
		44	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		45	# define EV_USE_SELECT 1
		46	# endif
		47
		48	# if HAVE_POLL && HAVE_POLL_H
		49	# define EV_USE_POLL 1
		50	# endif
		51
		52	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		53	# define EV_USE_EPOLL 1
		54	# endif
		55
		56	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		57	# define EV_USE_KQUEUE 1
		58	# endif
		59
		60	#endif
		61
30	#include <math.h>	62	#include <math.h>
31	#include <stdlib.h>	63	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	64	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	65	#include <stddef.h>
36		66
37	#include <stdio.h>	67	#include <stdio.h>
38		68
39	#include <assert.h>	69	#include <assert.h>
40	#include <errno.h>	70	#include <errno.h>
41	#include <sys/time.h>	71	#include <sys/types.h>
42	#include <time.h>	72	#include <time.h>
43		73
		74	#include <signal.h>
		75
		76	#ifndef WIN32
		77	# include <unistd.h>
		78	# include <sys/time.h>
		79	# include <sys/wait.h>
		80	#endif
		81	/**/
		82
44	#ifndef HAVE_MONOTONIC	83	#ifndef EV_USE_MONOTONIC
45	# ifdef CLOCK_MONOTONIC
46	# define HAVE_MONOTONIC 1	84	# define EV_USE_MONOTONIC 1
		85	#endif
		86
		87	#ifndef EV_USE_SELECT
		88	# define EV_USE_SELECT 1
		89	#endif
		90
		91	#ifndef EV_USE_POLL
		92	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		93	#endif
		94
		95	#ifndef EV_USE_EPOLL
		96	# define EV_USE_EPOLL 0
		97	#endif
		98
		99	#ifndef EV_USE_KQUEUE
		100	# define EV_USE_KQUEUE 0
		101	#endif
		102
		103	#ifndef EV_USE_WIN32
		104	# ifdef WIN32
		105	# define EV_USE_WIN32 0 /* it does not exist, use select */
		106	# undef EV_USE_SELECT
		107	# define EV_USE_SELECT 1
		108	# else
		109	# define EV_USE_WIN32 0
47	# endif	110	# endif
48	#endif	111	#endif
49		112
50	#ifndef HAVE_SELECT
51	# define HAVE_SELECT 1
52	#endif
53
54	#ifndef HAVE_EPOLL
55	# define HAVE_EPOLL 0
56	#endif
57
58	#ifndef HAVE_REALTIME	113	#ifndef EV_USE_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	114	# define EV_USE_REALTIME 1
60	#endif	115	#endif
		116
		117	/**/
		118
		119	#ifndef CLOCK_MONOTONIC
		120	# undef EV_USE_MONOTONIC
		121	# define EV_USE_MONOTONIC 0
		122	#endif
		123
		124	#ifndef CLOCK_REALTIME
		125	# undef EV_USE_REALTIME
		126	# define EV_USE_REALTIME 0
		127	#endif
		128
		129	/**/
61		130
62	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	131	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63	#define MAX_BLOCKTIME 60.	132	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		133	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		134	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
64		135
		136	#ifdef EV_H
		137	# include EV_H
		138	#else
65	#include "ev.h"	139	# include "ev.h"
		140	#endif
		141
		142	#if __GNUC__ >= 3
		143	# define expect(expr,value) __builtin_expect ((expr),(value))
		144	# define inline inline
		145	#else
		146	# define expect(expr,value) (expr)
		147	# define inline static
		148	#endif
		149
		150	#define expect_false(expr) expect ((expr) != 0, 0)
		151	#define expect_true(expr) expect ((expr) != 0, 1)
		152
		153	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		154	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
66		155
67	typedef struct ev_watcher *W;	156	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	157	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	158	typedef struct ev_watcher_time *WT;
70		159
71	static ev_tstamp now, diff; /* monotonic clock */	160	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74		161
75	static int have_monotonic; /* runtime */	162	#include "ev_win32.c"
76
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		163
81	/*****************************************************************************/	164	/*****************************************************************************/
82		165
83	ev_tstamp	166	static void (*syserr_cb)(const char *msg);
		167
		168	void ev_set_syserr_cb (void (*cb)(const char *msg))
		169	{
		170	syserr_cb = cb;
		171	}
		172
		173	static void
		174	syserr (const char *msg)
		175	{
		176	if (!msg)
		177	msg = "(libev) system error";
		178
		179	if (syserr_cb)
		180	syserr_cb (msg);
		181	else
		182	{
		183	perror (msg);
		184	abort ();
		185	}
		186	}
		187
		188	static void *(*alloc)(void *ptr, long size);
		189
		190	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		191	{
		192	alloc = cb;
		193	}
		194
		195	static void *
		196	ev_realloc (void *ptr, long size)
		197	{
		198	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		199
		200	if (!ptr && size)
		201	{
		202	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		203	abort ();
		204	}
		205
		206	return ptr;
		207	}
		208
		209	#define ev_malloc(size) ev_realloc (0, (size))
		210	#define ev_free(ptr) ev_realloc ((ptr), 0)
		211
		212	/*****************************************************************************/
		213
		214	typedef struct
		215	{
		216	WL head;
		217	unsigned char events;
		218	unsigned char reify;
		219	} ANFD;
		220
		221	typedef struct
		222	{
		223	W w;
		224	int events;
		225	} ANPENDING;
		226
		227	#if EV_MULTIPLICITY
		228
		229	struct ev_loop
		230	{
		231	ev_tstamp ev_rt_now;
		232	#define VAR(name,decl) decl;
		233	#include "ev_vars.h"
		234	#undef VAR
		235	};
		236	#include "ev_wrap.h"
		237
		238	struct ev_loop default_loop_struct;
		239	static struct ev_loop *default_loop;
		240
		241	#else
		242
		243	ev_tstamp ev_rt_now;
		244	#define VAR(name,decl) static decl;
		245	#include "ev_vars.h"
		246	#undef VAR
		247
		248	static int default_loop;
		249
		250	#endif
		251
		252	/*****************************************************************************/
		253
		254	inline ev_tstamp
84	ev_time (void)	255	ev_time (void)
85	{	256	{
86	#if HAVE_REALTIME	257	#if EV_USE_REALTIME
87	struct timespec ts;	258	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	259	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	261	#else
91	struct timeval tv;	262	struct timeval tv;
92	gettimeofday (&tv, 0);	263	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	264	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	265	#endif
95	}	266	}
96		267
97	static ev_tstamp	268	inline ev_tstamp
98	get_clock (void)	269	get_clock (void)
99	{	270	{
100	#if HAVE_MONOTONIC	271	#if EV_USE_MONOTONIC
101	if (have_monotonic)	272	if (expect_true (have_monotonic))
102	{	273	{
103	struct timespec ts;	274	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	275	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	276	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	277	}
107	#endif	278	#endif
108		279
109	return ev_time ();	280	return ev_time ();
110	}	281	}
111		282
		283	#if EV_MULTIPLICITY
		284	ev_tstamp
		285	ev_now (EV_P)
		286	{
		287	return ev_rt_now;
		288	}
		289	#endif
		290
		291	#define array_roundsize(type,n) ((n) | 4 & ~3)
		292
112	#define array_needsize(base,cur,cnt,init) \	293	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	294	if (expect_false ((cnt) > cur)) \
114	{ \	295	{ \
115	int newcnt = cur ? cur << 1 : 16; \	296	int newcnt = cur; \
		297	do \
		298	{ \
		299	newcnt = array_roundsize (type, newcnt << 1); \
		300	} \
		301	while ((cnt) > newcnt); \
		302	\
116	base = realloc (base, sizeof (*base) * (newcnt)); \	303	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
117	init (base + cur, newcnt - cur); \	304	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	305	cur = newcnt; \
119	}	306	}
		307
		308	#define array_slim(type,stem) \
		309	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		310	{ \
		311	stem ## max = array_roundsize (stem ## cnt >> 1); \
		312	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		313	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		314	}
		315
		316	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		317	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		318	#define array_free_microshit(stem) \
		319	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		320
		321	#define array_free(stem, idx) \
		322	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		323
121	/*****************************************************************************/	324	/*****************************************************************************/
122		325
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	326	static void
136	anfds_init (ANFD *base, int count)	327	anfds_init (ANFD *base, int count)
137	{	328	{
138	while (count--)	329	while (count--)
139	{	330	{
140	base->head = 0;	331	base->head = 0;
141	base->wev = base->rev = EV_NONE;	332	base->events = EV_NONE;
		333	base->reify = 0;
		334
142	++base;	335	++base;
143	}	336	}
144	}	337	}
145		338
146	typedef struct	339	void
		340	ev_feed_event (EV_P_ void *w, int revents)
147	{	341	{
148	W w;	342	W w_ = (W)w;
149	int events;
150	} ANPENDING;
151		343
152	static ANPENDING *pendings;	344	if (w_->pending)
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{	345	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	346	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		347	return;
164	}	348	}
165	}
166		349
		350	w_->pending = ++pendingcnt [ABSPRI (w_)];
		351	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
		352	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		353	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		354	}
		355
167	static void	356	static void
		357	queue_events (EV_P_ W *events, int eventcnt, int type)
		358	{
		359	int i;
		360
		361	for (i = 0; i < eventcnt; ++i)
		362	ev_feed_event (EV_A_ events [i], type);
		363	}
		364
		365	inline void
168	fd_event (int fd, int events)	366	fd_event (EV_P_ int fd, int revents)
169	{	367	{
170	ANFD *anfd = anfds + fd;	368	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	369	struct ev_io *w;
172		370
173	for (w = anfd->head; w; w = w->next)	371	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
174	{	372	{
175	int ev = w->events & events;	373	int ev = w->events & revents;
176		374
177	if (ev)	375	if (ev)
178	event ((W)w, ev);	376	ev_feed_event (EV_A_ (W)w, ev);
179	}	377	}
180	}	378	}
181		379
		380	void
		381	ev_feed_fd_event (EV_P_ int fd, int revents)
		382	{
		383	fd_event (EV_A_ fd, revents);
		384	}
		385
		386	/*****************************************************************************/
		387
182	static void	388	static void
183	queue_events (W *events, int eventcnt, int type)	389	fd_reify (EV_P)
184	{	390	{
185	int i;	391	int i;
186		392
187	for (i = 0; i < eventcnt; ++i)	393	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	394	{
		395	int fd = fdchanges [i];
		396	ANFD *anfd = anfds + fd;
		397	struct ev_io *w;
		398
		399	int events = 0;
		400
		401	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		402	events |= w->events;
		403
		404	anfd->reify = 0;
		405
		406	method_modify (EV_A_ fd, anfd->events, events);
		407	anfd->events = events;
		408	}
		409
		410	fdchangecnt = 0;
		411	}
		412
		413	static void
		414	fd_change (EV_P_ int fd)
		415	{
		416	if (anfds [fd].reify)
		417	return;
		418
		419	anfds [fd].reify = 1;
		420
		421	++fdchangecnt;
		422	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		423	fdchanges [fdchangecnt - 1] = fd;
		424	}
		425
		426	static void
		427	fd_kill (EV_P_ int fd)
		428	{
		429	struct ev_io *w;
		430
		431	while ((w = (struct ev_io *)anfds [fd].head))
		432	{
		433	ev_io_stop (EV_A_ w);
		434	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		435	}
		436	}
		437
		438	static int
		439	fd_valid (int fd)
		440	{
		441	#ifdef WIN32
		442	return !!win32_get_osfhandle (fd);
		443	#else
		444	return fcntl (fd, F_GETFD) != -1;
		445	#endif
189	}	446	}
190		447
191	/* called on EBADF to verify fds */	448	/* called on EBADF to verify fds */
192	static void	449	static void
193	fd_recheck ()	450	fd_ebadf (EV_P)
194	{	451	{
195	int fd;	452	int fd;
196		453
197	for (fd = 0; fd < anfdmax; ++fd)	454	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	455	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	456	if (!fd_valid (fd) == -1 && errno == EBADF)
200	while (anfds [fd].head)	457	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	458	}
		459
		460	/* called on ENOMEM in select/poll to kill some fds and retry */
		461	static void
		462	fd_enomem (EV_P)
		463	{
		464	int fd;
		465
		466	for (fd = anfdmax; fd--; )
		467	if (anfds [fd].events)
		468	{
		469	fd_kill (EV_A_ fd);
		470	return;
		471	}
		472	}
		473
		474	/* usually called after fork if method needs to re-arm all fds from scratch */
		475	static void
		476	fd_rearm_all (EV_P)
		477	{
		478	int fd;
		479
		480	/* this should be highly optimised to not do anything but set a flag */
		481	for (fd = 0; fd < anfdmax; ++fd)
		482	if (anfds [fd].events)
		483	{
		484	anfds [fd].events = 0;
		485	fd_change (EV_A_ fd);
		486	}
202	}	487	}
203		488
204	/*****************************************************************************/	489	/*****************************************************************************/
205		490
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	491	static void
213	upheap (WT *timers, int k)	492	upheap (WT *heap, int k)
214	{	493	{
215	WT w = timers [k];	494	WT w = heap [k];
216		495
217	while (k && timers [k >> 1]->at > w->at)	496	while (k && heap [k >> 1]->at > w->at)
218	{	497	{
219	timers [k] = timers [k >> 1];	498	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	499	((W)heap [k])->active = k + 1;
221	k >>= 1;	500	k >>= 1;
222	}	501	}
223		502
224	timers [k] = w;	503	heap [k] = w;
225	timers [k]->active = k + 1;	504	((W)heap [k])->active = k + 1;
226		505
227	}	506	}
228		507
229	static void	508	static void
230	downheap (WT *timers, int N, int k)	509	downheap (WT *heap, int N, int k)
231	{	510	{
232	WT w = timers [k];	511	WT w = heap [k];
233		512
234	while (k < (N >> 1))	513	while (k < (N >> 1))
235	{	514	{
236	int j = k << 1;	515	int j = k << 1;
237		516
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	517	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	518	++j;
240		519
241	if (w->at <= timers [j]->at)	520	if (w->at <= heap [j]->at)
242	break;	521	break;
243		522
244	timers [k] = timers [j];	523	heap [k] = heap [j];
245	timers [k]->active = k + 1;	524	((W)heap [k])->active = k + 1;
246	k = j;	525	k = j;
247	}	526	}
248		527
249	timers [k] = w;	528	heap [k] = w;
250	timers [k]->active = k + 1;	529	((W)heap [k])->active = k + 1;
		530	}
		531
		532	inline void
		533	adjustheap (WT *heap, int N, int k, ev_tstamp at)
		534	{
		535	ev_tstamp old_at = heap [k]->at;
		536	heap [k]->at = at;
		537
		538	if (old_at < at)
		539	downheap (heap, N, k);
		540	else
		541	upheap (heap, k);
251	}	542	}
252		543
253	/*****************************************************************************/	544	/*****************************************************************************/
254		545
255	typedef struct	546	typedef struct
256	{	547	{
257	struct ev_signal *head;	548	WL head;
258	sig_atomic_t gotsig;	549	sig_atomic_t volatile gotsig;
259	} ANSIG;	550	} ANSIG;
260		551
261	static ANSIG *signals;	552	static ANSIG *signals;
262	static int signalmax;	553	static int signalmax;
263		554
264	static int sigpipe [2];	555	static int sigpipe [2];
265	static sig_atomic_t gotsig;	556	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	557	static struct ev_io sigev;
267		558
268	static void	559	static void
269	signals_init (ANSIG *base, int count)	560	signals_init (ANSIG *base, int count)
270	{	561	{
271	while (count--)	562	while (count--)
272	{	563	{
273	base->head = 0;	564	base->head = 0;
274	base->gotsig = 0;	565	base->gotsig = 0;
		566
275	++base;	567	++base;
276	}	568	}
277	}	569	}
278		570
279	static void	571	static void
280	sighandler (int signum)	572	sighandler (int signum)
281	{	573	{
		574	#if WIN32
		575	signal (signum, sighandler);
		576	#endif
		577
282	signals [signum - 1].gotsig = 1;	578	signals [signum - 1].gotsig = 1;
283		579
284	if (!gotsig)	580	if (!gotsig)
285	{	581	{
		582	int old_errno = errno;
286	gotsig = 1;	583	gotsig = 1;
		584	#ifdef WIN32
		585	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		586	#else
287	write (sigpipe [1], &gotsig, 1);	587	write (sigpipe [1], &signum, 1);
		588	#endif
		589	errno = old_errno;
288	}	590	}
289	}	591	}
290		592
		593	void
		594	ev_feed_signal_event (EV_P_ int signum)
		595	{
		596	WL w;
		597
		598	#if EV_MULTIPLICITY
		599	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		600	#endif
		601
		602	--signum;
		603
		604	if (signum < 0 || signum >= signalmax)
		605	return;
		606
		607	signals [signum].gotsig = 0;
		608
		609	for (w = signals [signum].head; w; w = w->next)
		610	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		611	}
		612
291	static void	613	static void
292	sigcb (struct ev_io *iow, int revents)	614	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	615	{
294	struct ev_signal *w;
295	int sig;	616	int signum;
296		617
		618	#ifdef WIN32
		619	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		620	#else
		621	read (sigpipe [0], &revents, 1);
		622	#endif
297	gotsig = 0;	623	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		624
300	for (sig = signalmax; sig--; )	625	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	626	if (signals [signum].gotsig)
302	{	627	ev_feed_signal_event (EV_A_ signum + 1);
303	signals [sig].gotsig = 0;
304
305	for (w = signals [sig].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);
307	}
308	}	628	}
309		629
310	static void	630	static void
311	siginit (void)	631	siginit (EV_P)
312	{	632	{
		633	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	634	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	635	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		636
316	/* rather than sort out wether we really need nb, set it */	637	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	638	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	639	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		640	#endif
319		641
320	evio_set (&sigev, sigpipe [0], EV_READ);	642	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	643	ev_io_start (EV_A_ &sigev);
		644	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	645	}
323		646
324	/*****************************************************************************/	647	/*****************************************************************************/
325		648
326	static struct ev_idle **idles;	649	static struct ev_child *childs [PID_HASHSIZE];
327	static int idlemax, idlecnt;
328		650
329	static struct ev_check **checks;	651	#ifndef WIN32
330	static int checkmax, checkcnt;	652
		653	static struct ev_signal childev;
		654
		655	#ifndef WCONTINUED
		656	# define WCONTINUED 0
		657	#endif
		658
		659	static void
		660	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		661	{
		662	struct ev_child *w;
		663
		664	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		665	if (w->pid == pid || !w->pid)
		666	{
		667	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		668	w->rpid = pid;
		669	w->rstatus = status;
		670	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		671	}
		672	}
		673
		674	static void
		675	childcb (EV_P_ struct ev_signal *sw, int revents)
		676	{
		677	int pid, status;
		678
		679	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		680	{
		681	/* make sure we are called again until all childs have been reaped */
		682	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		683
		684	child_reap (EV_A_ sw, pid, pid, status);
		685	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		686	}
		687	}
		688
		689	#endif
331		690
332	/*****************************************************************************/	691	/*****************************************************************************/
333		692
		693	#if EV_USE_KQUEUE
		694	# include "ev_kqueue.c"
		695	#endif
334	#if HAVE_EPOLL	696	#if EV_USE_EPOLL
335	# include "ev_epoll.c"	697	# include "ev_epoll.c"
336	#endif	698	#endif
		699	#if EV_USE_POLL
		700	# include "ev_poll.c"
		701	#endif
337	#if HAVE_SELECT	702	#if EV_USE_SELECT
338	# include "ev_select.c"	703	# include "ev_select.c"
339	#endif	704	#endif
340		705
341	int ev_init (int flags)	706	int
		707	ev_version_major (void)
342	{	708	{
		709	return EV_VERSION_MAJOR;
		710	}
		711
		712	int
		713	ev_version_minor (void)
		714	{
		715	return EV_VERSION_MINOR;
		716	}
		717
		718	/* return true if we are running with elevated privileges and should ignore env variables */
		719	static int
		720	enable_secure (void)
		721	{
		722	#ifdef WIN32
		723	return 0;
		724	#else
		725	return getuid () != geteuid ()
		726	|| getgid () != getegid ();
		727	#endif
		728	}
		729
		730	int
		731	ev_method (EV_P)
		732	{
		733	return method;
		734	}
		735
		736	static void
		737	loop_init (EV_P_ int methods)
		738	{
		739	if (!method)
		740	{
343	#if HAVE_MONOTONIC	741	#if EV_USE_MONOTONIC
344	{	742	{
345	struct timespec ts;	743	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	744	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;	745	have_monotonic = 1;
348	}	746	}
349	#endif	747	#endif
350		748
351	ev_now = ev_time ();	749	ev_rt_now = ev_time ();
352	now = get_clock ();	750	mn_now = get_clock ();
353	diff = ev_now - now;	751	now_floor = mn_now;
		752	rtmn_diff = ev_rt_now - mn_now;
354		753
355	if (pipe (sigpipe))	754	if (methods == EVMETHOD_AUTO)
356	return 0;	755	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		756	methods = atoi (getenv ("LIBEV_METHODS"));
		757	else
		758	methods = EVMETHOD_ANY;
357		759
358	ev_method = EVMETHOD_NONE;	760	method = 0;
		761	#if EV_USE_WIN32
		762	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		763	#endif
		764	#if EV_USE_KQUEUE
		765	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		766	#endif
359	#if HAVE_EPOLL	767	#if EV_USE_EPOLL
360	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	768	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
361	#endif	769	#endif
		770	#if EV_USE_POLL
		771	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		772	#endif
362	#if HAVE_SELECT	773	#if EV_USE_SELECT
363	if (ev_method == EVMETHOD_NONE) select_init (flags);	774	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
364	#endif	775	#endif
365		776
366	if (ev_method)
367	{
368	evw_init (&sigev, sigcb);	777	ev_init (&sigev, sigcb);
		778	ev_set_priority (&sigev, EV_MAXPRI);
		779	}
		780	}
		781
		782	void
		783	loop_destroy (EV_P)
		784	{
		785	int i;
		786
		787	#if EV_USE_WIN32
		788	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		789	#endif
		790	#if EV_USE_KQUEUE
		791	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		792	#endif
		793	#if EV_USE_EPOLL
		794	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		795	#endif
		796	#if EV_USE_POLL
		797	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		798	#endif
		799	#if EV_USE_SELECT
		800	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		801	#endif
		802
		803	for (i = NUMPRI; i--; )
		804	array_free (pending, [i]);
		805
		806	/* have to use the microsoft-never-gets-it-right macro */
		807	array_free_microshit (fdchange);
		808	array_free_microshit (timer);
		809	array_free_microshit (periodic);
		810	array_free_microshit (idle);
		811	array_free_microshit (prepare);
		812	array_free_microshit (check);
		813
		814	method = 0;
		815	}
		816
		817	static void
		818	loop_fork (EV_P)
		819	{
		820	#if EV_USE_EPOLL
		821	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		822	#endif
		823	#if EV_USE_KQUEUE
		824	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		825	#endif
		826
		827	if (ev_is_active (&sigev))
		828	{
		829	/* default loop */
		830
		831	ev_ref (EV_A);
		832	ev_io_stop (EV_A_ &sigev);
		833	close (sigpipe [0]);
		834	close (sigpipe [1]);
		835
		836	while (pipe (sigpipe))
		837	syserr ("(libev) error creating pipe");
		838
369	siginit ();	839	siginit (EV_A);
		840	}
		841
		842	postfork = 0;
		843	}
		844
		845	#if EV_MULTIPLICITY
		846	struct ev_loop *
		847	ev_loop_new (int methods)
		848	{
		849	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		850
		851	memset (loop, 0, sizeof (struct ev_loop));
		852
		853	loop_init (EV_A_ methods);
		854
		855	if (ev_method (EV_A))
		856	return loop;
		857
		858	return 0;
		859	}
		860
		861	void
		862	ev_loop_destroy (EV_P)
		863	{
		864	loop_destroy (EV_A);
		865	ev_free (loop);
		866	}
		867
		868	void
		869	ev_loop_fork (EV_P)
		870	{
		871	postfork = 1;
		872	}
		873
		874	#endif
		875
		876	#if EV_MULTIPLICITY
		877	struct ev_loop *
		878	#else
		879	int
		880	#endif
		881	ev_default_loop (int methods)
		882	{
		883	if (sigpipe [0] == sigpipe [1])
		884	if (pipe (sigpipe))
		885	return 0;
		886
		887	if (!default_loop)
370	}	888	{
		889	#if EV_MULTIPLICITY
		890	struct ev_loop *loop = default_loop = &default_loop_struct;
		891	#else
		892	default_loop = 1;
		893	#endif
371		894
372	return ev_method;	895	loop_init (EV_A_ methods);
		896
		897	if (ev_method (EV_A))
		898	{
		899	siginit (EV_A);
		900
		901	#ifndef WIN32
		902	ev_signal_init (&childev, childcb, SIGCHLD);
		903	ev_set_priority (&childev, EV_MAXPRI);
		904	ev_signal_start (EV_A_ &childev);
		905	ev_unref (EV_A); /* child watcher should not keep loop alive */
		906	#endif
		907	}
		908	else
		909	default_loop = 0;
		910	}
		911
		912	return default_loop;
		913	}
		914
		915	void
		916	ev_default_destroy (void)
		917	{
		918	#if EV_MULTIPLICITY
		919	struct ev_loop *loop = default_loop;
		920	#endif
		921
		922	#ifndef WIN32
		923	ev_ref (EV_A); /* child watcher */
		924	ev_signal_stop (EV_A_ &childev);
		925	#endif
		926
		927	ev_ref (EV_A); /* signal watcher */
		928	ev_io_stop (EV_A_ &sigev);
		929
		930	close (sigpipe [0]); sigpipe [0] = 0;
		931	close (sigpipe [1]); sigpipe [1] = 0;
		932
		933	loop_destroy (EV_A);
		934	}
		935
		936	void
		937	ev_default_fork (void)
		938	{
		939	#if EV_MULTIPLICITY
		940	struct ev_loop *loop = default_loop;
		941	#endif
		942
		943	if (method)
		944	postfork = 1;
373	}	945	}
374		946
375	/*****************************************************************************/	947	/*****************************************************************************/
376		948
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	949	static int
404	fd_reify (void)	950	any_pending (EV_P)
405	{	951	{
406	int i;	952	int pri;
407		953
408	for (i = 0; i < fdchangecnt; ++i)	954	for (pri = NUMPRI; pri--; )
409	{	955	if (pendingcnt [pri])
410	int fd = fdchanges [i];	956	return 1;
411	ANFD *anfd = anfds + fd;
412	struct ev_io *w;
413		957
414	int wev = 0;	958	return 0;
415
416	for (w = anfd->head; w; w = w->next)
417	wev |= w->events;
418
419	if (anfd->wev != wev)
420	{
421	method_modify (fd, anfd->wev, wev);
422	anfd->wev = wev;
423	}
424	}
425
426	fdchangecnt = 0;
427	}	959	}
428		960
429	static void	961	static void
430	call_pending ()	962	call_pending (EV_P)
431	{	963	{
		964	int pri;
		965
		966	for (pri = NUMPRI; pri--; )
432	while (pendingcnt)	967	while (pendingcnt [pri])
433	{	968	{
434	ANPENDING *p = pendings + --pendingcnt;	969	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
435		970
436	if (p->w)	971	if (p->w)
437	{	972	{
438	p->w->pending = 0;	973	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	974	EV_CB_INVOKE (p->w, p->events);
440	}	975	}
441	}	976	}
442	}	977	}
443		978
444	static void	979	static void
445	timers_reify ()	980	timers_reify (EV_P)
446	{	981	{
447	while (timercnt && timers [0]->at <= now)	982	while (timercnt && ((WT)timers [0])->at <= mn_now)
448	{	983	{
449	struct ev_timer *w = timers [0];	984	struct ev_timer *w = timers [0];
450		985
451	event ((W)w, EV_TIMEOUT);	986	assert (("inactive timer on timer heap detected", ev_is_active (w)));
452		987
453	/* first reschedule or stop timer */	988	/* first reschedule or stop timer */
454	if (w->repeat)	989	if (w->repeat)
455	{	990	{
		991	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
456	w->at = now + w->repeat;	992	((WT)w)->at = mn_now + w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));
458	downheap ((WT *)timers, timercnt, 0);	993	downheap ((WT *)timers, timercnt, 0);
459	}	994	}
460	else	995	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	996	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		997
		998	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		999	}
		1000	}
		1001
465	static void	1002	static void
466	periodics_reify ()	1003	periodics_reify (EV_P)
467	{	1004	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	1005	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
469	{	1006	{
470	struct ev_periodic *w = periodics [0];	1007	struct ev_periodic *w = periodics [0];
471		1008
		1009	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1010
472	/* first reschedule or stop timer */	1011	/* first reschedule or stop timer */
473	if (w->interval)	1012	if (w->reschedule_cb)
474	{	1013	{
		1014	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1015
		1016	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1017	downheap ((WT *)periodics, periodiccnt, 0);
		1018	}
		1019	else if (w->interval)
		1020	{
475	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1021	((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));	1022	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);	1023	downheap ((WT *)periodics, periodiccnt, 0);
478	}	1024	}
479	else	1025	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	1026	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		1027
482	event ((W)w, EV_TIMEOUT);	1028	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
483	}	1029	}
484	}	1030	}
485		1031
486	static void	1032	static void
487	periodics_reschedule (ev_tstamp diff)	1033	periodics_reschedule (EV_P)
488	{	1034	{
489	int i;	1035	int i;
490		1036
491	/* adjust periodics after time jump */	1037	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	1038	for (i = 0; i < periodiccnt; ++i)
493	{	1039	{
494	struct ev_periodic *w = periodics [i];	1040	struct ev_periodic *w = periodics [i];
495		1041
		1042	if (w->reschedule_cb)
		1043	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
496	if (w->interval)	1044	else if (w->interval)
		1045	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1046	}
		1047
		1048	/* now rebuild the heap */
		1049	for (i = periodiccnt >> 1; i--; )
		1050	downheap ((WT *)periodics, periodiccnt, i);
		1051	}
		1052
		1053	inline int
		1054	time_update_monotonic (EV_P)
		1055	{
		1056	mn_now = get_clock ();
		1057
		1058	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1059	{
		1060	ev_rt_now = rtmn_diff + mn_now;
		1061	return 0;
		1062	}
		1063	else
		1064	{
		1065	now_floor = mn_now;
		1066	ev_rt_now = ev_time ();
		1067	return 1;
		1068	}
		1069	}
		1070
		1071	static void
		1072	time_update (EV_P)
		1073	{
		1074	int i;
		1075
		1076	#if EV_USE_MONOTONIC
		1077	if (expect_true (have_monotonic))
		1078	{
		1079	if (time_update_monotonic (EV_A))
497	{	1080	{
498	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1081	ev_tstamp odiff = rtmn_diff;
499		1082
500	if (fabs (diff) >= 1e-4)	1083	for (i = 4; --i; ) /* loop a few times, before making important decisions */
501	{	1084	{
502	evperiodic_stop (w);	1085	rtmn_diff = ev_rt_now - mn_now;
503	evperiodic_start (w);
504		1086
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1087	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1088	return; /* all is well */
		1089
		1090	ev_rt_now = ev_time ();
		1091	mn_now = get_clock ();
		1092	now_floor = mn_now;
506	}	1093	}
		1094
		1095	periodics_reschedule (EV_A);
		1096	/* no timer adjustment, as the monotonic clock doesn't jump */
		1097	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
507	}	1098	}
508	}	1099	}
509	}	1100	else
510		1101	#endif
511	static void	1102	{
512	time_update ()
513	{
514	int i;
515
516	ev_now = ev_time ();	1103	ev_rt_now = ev_time ();
517		1104
518	if (have_monotonic)	1105	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	{	1106	{
524	now = get_clock ();
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);	1107	periodics_reschedule (EV_A);
541		1108
542	/* adjust timers. this is easy, as the offset is the same for all */	1109	/* adjust timers. this is easy, as the offset is the same for all */
543	for (i = 0; i < timercnt; ++i)	1110	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	1111	((WT)timers [i])->at += ev_rt_now - mn_now;
545	}	1112	}
546		1113
547	now = ev_now;	1114	mn_now = ev_rt_now;
548	}	1115	}
549	}	1116	}
550		1117
551	int ev_loop_done;	1118	void
		1119	ev_ref (EV_P)
		1120	{
		1121	++activecnt;
		1122	}
552		1123
		1124	void
		1125	ev_unref (EV_P)
		1126	{
		1127	--activecnt;
		1128	}
		1129
		1130	static int loop_done;
		1131
		1132	void
553	void ev_loop (int flags)	1133	ev_loop (EV_P_ int flags)
554	{	1134	{
555	double block;	1135	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1136	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
557
558	if (checkcnt)
559	{
560	queue_events ((W *)checks, checkcnt, EV_CHECK);
561	call_pending ();
562	}
563		1137
564	do	1138	do
565	{	1139	{
		1140	/* queue check watchers (and execute them) */
		1141	if (expect_false (preparecnt))
		1142	{
		1143	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1144	call_pending (EV_A);
		1145	}
		1146
		1147	/* we might have forked, so reify kernel state if necessary */
		1148	if (expect_false (postfork))
		1149	loop_fork (EV_A);
		1150
566	/* update fd-related kernel structures */	1151	/* update fd-related kernel structures */
567	fd_reify ();	1152	fd_reify (EV_A);
568		1153
569	/* calculate blocking time */	1154	/* calculate blocking time */
570		1155
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1156	/* we only need this for !monotonic clock or timers, but as we basically
		1157	always have timers, we just calculate it always */
		1158	#if EV_USE_MONOTONIC
		1159	if (expect_true (have_monotonic))
		1160	time_update_monotonic (EV_A);
		1161	else
		1162	#endif
		1163	{
572	ev_now = ev_time ();	1164	ev_rt_now = ev_time ();
		1165	mn_now = ev_rt_now;
		1166	}
573		1167
574	if (flags & EVLOOP_NONBLOCK || idlecnt)	1168	if (flags & EVLOOP_NONBLOCK || idlecnt)
575	block = 0.;	1169	block = 0.;
576	else	1170	else
577	{	1171	{
578	block = MAX_BLOCKTIME;	1172	block = MAX_BLOCKTIME;
579		1173
580	if (timercnt)	1174	if (timercnt)
581	{	1175	{
582	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1176	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
583	if (block > to) block = to;	1177	if (block > to) block = to;
584	}	1178	}
585		1179
586	if (periodiccnt)	1180	if (periodiccnt)
587	{	1181	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1182	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
589	if (block > to) block = to;	1183	if (block > to) block = to;
590	}	1184	}
591		1185
592	if (block < 0.) block = 0.;	1186	if (block < 0.) block = 0.;
593	}	1187	}
594		1188
595	method_poll (block);	1189	method_poll (EV_A_ block);
596		1190
597	/* update ev_now, do magic */	1191	/* update ev_rt_now, do magic */
598	time_update ();	1192	time_update (EV_A);
599		1193
600	/* queue pending timers and reschedule them */	1194	/* queue pending timers and reschedule them */
		1195	timers_reify (EV_A); /* relative timers called last */
601	periodics_reify (); /* absolute timers first */	1196	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */
603		1197
604	/* queue idle watchers unless io or timers are pending */	1198	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	1199	if (idlecnt && !any_pending (EV_A))
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	1200	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		1201
608	/* queue check and possibly idle watchers */	1202	/* queue check watchers, to be executed first */
		1203	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	1204	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		1205
611	call_pending ();	1206	call_pending (EV_A);
612	}	1207	}
613	while (!ev_loop_done);	1208	while (activecnt && !loop_done);
614		1209
615	if (ev_loop_done != 2)	1210	if (loop_done != 2)
616	ev_loop_done = 0;	1211	loop_done = 0;
		1212	}
		1213
		1214	void
		1215	ev_unloop (EV_P_ int how)
		1216	{
		1217	loop_done = how;
617	}	1218	}
618		1219
619	/*****************************************************************************/	1220	/*****************************************************************************/
620		1221
621	static void	1222	inline void
622	wlist_add (WL *head, WL elem)	1223	wlist_add (WL *head, WL elem)
623	{	1224	{
624	elem->next = *head;	1225	elem->next = *head;
625	*head = elem;	1226	*head = elem;
626	}	1227	}
627		1228
628	static void	1229	inline void
629	wlist_del (WL *head, WL elem)	1230	wlist_del (WL *head, WL elem)
630	{	1231	{
631	while (*head)	1232	while (*head)
632	{	1233	{
633	if (*head == elem)	1234	if (*head == elem)
…		…
638		1239
639	head = &(*head)->next;	1240	head = &(*head)->next;
640	}	1241	}
641	}	1242	}
642		1243
643	static void	1244	inline void
644	ev_clear (W w)	1245	ev_clear_pending (EV_P_ W w)
645	{	1246	{
646	if (w->pending)	1247	if (w->pending)
647	{	1248	{
648	pendings [w->pending - 1].w = 0;	1249	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1250	w->pending = 0;
650	}	1251	}
651	}	1252	}
652		1253
653	static void	1254	inline void
654	ev_start (W w, int active)	1255	ev_start (EV_P_ W w, int active)
655	{	1256	{
		1257	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1258	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1259
656	w->active = active;	1260	w->active = active;
		1261	ev_ref (EV_A);
657	}	1262	}
658		1263
659	static void	1264	inline void
660	ev_stop (W w)	1265	ev_stop (EV_P_ W w)
661	{	1266	{
		1267	ev_unref (EV_A);
662	w->active = 0;	1268	w->active = 0;
663	}	1269	}
664		1270
665	/*****************************************************************************/	1271	/*****************************************************************************/
666		1272
667	void	1273	void
668	evio_start (struct ev_io *w)	1274	ev_io_start (EV_P_ struct ev_io *w)
669	{	1275	{
		1276	int fd = w->fd;
		1277
670	if (ev_is_active (w))	1278	if (ev_is_active (w))
671	return;	1279	return;
672		1280
673	int fd = w->fd;	1281	assert (("ev_io_start called with negative fd", fd >= 0));
674		1282
675	ev_start ((W)w, 1);	1283	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1284	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1285	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1286
679	++fdchangecnt;	1287	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1288	}
683		1289
684	void	1290	void
685	evio_stop (struct ev_io *w)	1291	ev_io_stop (EV_P_ struct ev_io *w)
686	{	1292	{
687	ev_clear ((W)w);	1293	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1294	if (!ev_is_active (w))
689	return;	1295	return;
690		1296
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1297	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1298	ev_stop (EV_A_ (W)w);
693		1299
694	++fdchangecnt;	1300	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1301	}
698		1302
699	void	1303	void
700	evtimer_start (struct ev_timer *w)	1304	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1305	{
702	if (ev_is_active (w))	1306	if (ev_is_active (w))
703	return;	1307	return;
704		1308
705	w->at += now;	1309	((WT)w)->at += mn_now;
706		1310
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1311	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1312
709	ev_start ((W)w, ++timercnt);	1313	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1314	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
711	timers [timercnt - 1] = w;	1315	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1316	upheap ((WT *)timers, timercnt - 1);
713	}
714		1317
		1318	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1319	}
		1320
715	void	1321	void
716	evtimer_stop (struct ev_timer *w)	1322	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1323	{
718	ev_clear ((W)w);	1324	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1325	if (!ev_is_active (w))
720	return;	1326	return;
721		1327
		1328	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1329
722	if (w->active < timercnt--)	1330	if (((W)w)->active < timercnt--)
723	{	1331	{
724	timers [w->active - 1] = timers [timercnt];	1332	timers [((W)w)->active - 1] = timers [timercnt];
725	downheap ((WT *)timers, timercnt, w->active - 1);	1333	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
726	}	1334	}
727		1335
728	w->at = w->repeat;	1336	((WT)w)->at = w->repeat;
729		1337
730	ev_stop ((W)w);	1338	ev_stop (EV_A_ (W)w);
731	}	1339	}
732		1340
733	void	1341	void
734	evtimer_again (struct ev_timer *w)	1342	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1343	{
736	if (ev_is_active (w))	1344	if (ev_is_active (w))
737	{	1345	{
738	if (w->repeat)	1346	if (w->repeat)
739	{
740	w->at = now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1347	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
742	}
743	else	1348	else
744	evtimer_stop (w);	1349	ev_timer_stop (EV_A_ w);
745	}	1350	}
746	else if (w->repeat)	1351	else if (w->repeat)
747	evtimer_start (w);	1352	ev_timer_start (EV_A_ w);
748	}	1353	}
749		1354
750	void	1355	void
751	evperiodic_start (struct ev_periodic *w)	1356	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1357	{
753	if (ev_is_active (w))	1358	if (ev_is_active (w))
754	return;	1359	return;
755		1360
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1361	if (w->reschedule_cb)
757		1362	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1363	else if (w->interval)
		1364	{
		1365	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 */	1366	/* 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;	1367	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1368	}
761		1369
762	ev_start ((W)w, ++periodiccnt);	1370	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1371	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
764	periodics [periodiccnt - 1] = w;	1372	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1373	upheap ((WT *)periodics, periodiccnt - 1);
766	}
767		1374
		1375	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1376	}
		1377
768	void	1378	void
769	evperiodic_stop (struct ev_periodic *w)	1379	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1380	{
771	ev_clear ((W)w);	1381	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1382	if (!ev_is_active (w))
773	return;	1383	return;
774		1384
		1385	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1386
775	if (w->active < periodiccnt--)	1387	if (((W)w)->active < periodiccnt--)
776	{	1388	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1389	periodics [((W)w)->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1390	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
779	}	1391	}
780		1392
781	ev_stop ((W)w);	1393	ev_stop (EV_A_ (W)w);
782	}	1394	}
783		1395
784	void	1396	void
785	evsignal_start (struct ev_signal *w)	1397	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1398	{
		1399	/* TODO: use adjustheap and recalculation */
		1400	ev_periodic_stop (EV_A_ w);
		1401	ev_periodic_start (EV_A_ w);
		1402	}
		1403
		1404	void
		1405	ev_idle_start (EV_P_ struct ev_idle *w)
786	{	1406	{
787	if (ev_is_active (w))	1407	if (ev_is_active (w))
788	return;	1408	return;
789		1409
		1410	ev_start (EV_A_ (W)w, ++idlecnt);
		1411	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1412	idles [idlecnt - 1] = w;
		1413	}
		1414
		1415	void
		1416	ev_idle_stop (EV_P_ struct ev_idle *w)
		1417	{
		1418	ev_clear_pending (EV_A_ (W)w);
		1419	if (ev_is_active (w))
		1420	return;
		1421
		1422	idles [((W)w)->active - 1] = idles [--idlecnt];
		1423	ev_stop (EV_A_ (W)w);
		1424	}
		1425
		1426	void
		1427	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1428	{
		1429	if (ev_is_active (w))
		1430	return;
		1431
		1432	ev_start (EV_A_ (W)w, ++preparecnt);
		1433	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1434	prepares [preparecnt - 1] = w;
		1435	}
		1436
		1437	void
		1438	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1439	{
		1440	ev_clear_pending (EV_A_ (W)w);
		1441	if (ev_is_active (w))
		1442	return;
		1443
		1444	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1445	ev_stop (EV_A_ (W)w);
		1446	}
		1447
		1448	void
		1449	ev_check_start (EV_P_ struct ev_check *w)
		1450	{
		1451	if (ev_is_active (w))
		1452	return;
		1453
		1454	ev_start (EV_A_ (W)w, ++checkcnt);
		1455	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1456	checks [checkcnt - 1] = w;
		1457	}
		1458
		1459	void
		1460	ev_check_stop (EV_P_ struct ev_check *w)
		1461	{
		1462	ev_clear_pending (EV_A_ (W)w);
		1463	if (ev_is_active (w))
		1464	return;
		1465
		1466	checks [((W)w)->active - 1] = checks [--checkcnt];
		1467	ev_stop (EV_A_ (W)w);
		1468	}
		1469
		1470	#ifndef SA_RESTART
		1471	# define SA_RESTART 0
		1472	#endif
		1473
		1474	void
		1475	ev_signal_start (EV_P_ struct ev_signal *w)
		1476	{
		1477	#if EV_MULTIPLICITY
		1478	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1479	#endif
		1480	if (ev_is_active (w))
		1481	return;
		1482
		1483	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1484
790	ev_start ((W)w, 1);	1485	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1486	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1487	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1488
794	if (!w->next)	1489	if (!((WL)w)->next)
795	{	1490	{
		1491	#if WIN32
		1492	signal (w->signum, sighandler);
		1493	#else
796	struct sigaction sa;	1494	struct sigaction sa;
797	sa.sa_handler = sighandler;	1495	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1496	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1497	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1498	sigaction (w->signum, &sa, 0);
		1499	#endif
801	}	1500	}
802	}	1501	}
803		1502
804	void	1503	void
805	evsignal_stop (struct ev_signal *w)	1504	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1505	{
807	ev_clear ((W)w);	1506	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1507	if (!ev_is_active (w))
809	return;	1508	return;
810		1509
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1510	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1511	ev_stop (EV_A_ (W)w);
813		1512
814	if (!signals [w->signum - 1].head)	1513	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1514	signal (w->signum, SIG_DFL);
816	}	1515	}
817		1516
818	void evidle_start (struct ev_idle *w)	1517	void
		1518	ev_child_start (EV_P_ struct ev_child *w)
819	{	1519	{
		1520	#if EV_MULTIPLICITY
		1521	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1522	#endif
820	if (ev_is_active (w))	1523	if (ev_is_active (w))
821	return;	1524	return;
822		1525
823	ev_start ((W)w, ++idlecnt);	1526	ev_start (EV_A_ (W)w, 1);
824	array_needsize (idles, idlemax, idlecnt, );	1527	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
825	idles [idlecnt - 1] = w;
826	}	1528	}
827		1529
828	void evidle_stop (struct ev_idle *w)	1530	void
		1531	ev_child_stop (EV_P_ struct ev_child *w)
829	{	1532	{
830	ev_clear ((W)w);	1533	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1534	if (ev_is_active (w))
832	return;	1535	return;
833		1536
834	idles [w->active - 1] = idles [--idlecnt];	1537	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
835	ev_stop ((W)w);	1538	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	}	1539	}
857		1540
858	/*****************************************************************************/	1541	/*****************************************************************************/
859		1542
860	struct ev_once	1543	struct ev_once
…		…
864	void (*cb)(int revents, void *arg);	1547	void (*cb)(int revents, void *arg);
865	void *arg;	1548	void *arg;
866	};	1549	};
867		1550
868	static void	1551	static void
869	once_cb (struct ev_once *once, int revents)	1552	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1553	{
871	void (*cb)(int revents, void *arg) = once->cb;	1554	void (*cb)(int revents, void *arg) = once->cb;
872	void *arg = once->arg;	1555	void *arg = once->arg;
873		1556
874	evio_stop (&once->io);	1557	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1558	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1559	ev_free (once);
877		1560
878	cb (revents, arg);	1561	cb (revents, arg);
879	}	1562	}
880		1563
881	static void	1564	static void
882	once_cb_io (struct ev_io *w, int revents)	1565	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1566	{
884	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1567	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
885	}	1568	}
886		1569
887	static void	1570	static void
888	once_cb_to (struct ev_timer *w, int revents)	1571	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1572	{
890	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1573	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
891	}	1574	}
892		1575
893	void	1576	void
894	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1577	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
895	{	1578	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1579	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
897		1580
898	if (!once)	1581	if (!once)
899	cb (EV_ERROR, arg);	1582	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
900	else	1583	else
901	{	1584	{
902	once->cb = cb;	1585	once->cb = cb;
903	once->arg = arg;	1586	once->arg = arg;
904		1587
905	evw_init (&once->io, once_cb_io);	1588	ev_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1589	if (fd >= 0)
908	{	1590	{
909	evio_set (&once->io, fd, events);	1591	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1592	ev_io_start (EV_A_ &once->io);
911	}	1593	}
912		1594
913	evw_init (&once->to, once_cb_to);	1595	ev_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1596	if (timeout >= 0.)
916	{	1597	{
917	evtimer_set (&once->to, timeout, 0.);	1598	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1599	ev_timer_start (EV_A_ &once->to);
919	}	1600	}
920	}	1601	}
921	}	1602	}
922		1603
923	/*****************************************************************************/	1604	#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	}	1605	}
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	1606	#endif
979		1607
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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