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Comparing libev/ev.c (file contents):
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC vs.
Revision 1.160 by root, Sat Dec 1 22:57:20 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	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_INOTIFY
		100	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		101	# define EV_USE_INOTIFY 1
		102	# else
		103	# define EV_USE_INOTIFY 0
		104	# endif
		105	# endif
		106
		107	#endif
		108
30	#include <math.h>	109	#include <math.h>
31	#include <stdlib.h>	110	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	111	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	112	#include <stddef.h>
36		113
37	#include <stdio.h>	114	#include <stdio.h>
38		115
39	#include <assert.h>	116	#include <assert.h>
40	#include <errno.h>	117	#include <errno.h>
41	#include <sys/types.h>	118	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	119	#include <time.h>
45		120
46	#ifndef HAVE_MONOTONIC	121	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	122
48	# define HAVE_MONOTONIC 1	123	#ifdef EV_H
		124	# include EV_H
		125	#else
		126	# include "ev.h"
		127	#endif
		128
		129	#ifndef _WIN32
		130	# include <sys/time.h>
		131	# include <sys/wait.h>
		132	# include <unistd.h>
		133	#else
		134	# define WIN32_LEAN_AND_MEAN
		135	# include <windows.h>
		136	# ifndef EV_SELECT_IS_WINSOCKET
		137	# define EV_SELECT_IS_WINSOCKET 1
49	# endif	138	# endif
50	#endif	139	#endif
51		140
		141	/**/
		142
		143	#ifndef EV_USE_MONOTONIC
		144	# define EV_USE_MONOTONIC 0
		145	#endif
		146
		147	#ifndef EV_USE_REALTIME
		148	# define EV_USE_REALTIME 0
		149	#endif
		150
52	#ifndef HAVE_SELECT	151	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	152	# define EV_USE_SELECT 1
		153	#endif
		154
		155	#ifndef EV_USE_POLL
		156	# ifdef _WIN32
		157	# define EV_USE_POLL 0
		158	# else
		159	# define EV_USE_POLL 1
54	#endif	160	# endif
		161	#endif
55		162
56	#ifndef HAVE_EPOLL	163	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	164	# define EV_USE_EPOLL 0
		165	#endif
		166
		167	#ifndef EV_USE_KQUEUE
		168	# define EV_USE_KQUEUE 0
		169	#endif
		170
		171	#ifndef EV_USE_PORT
		172	# define EV_USE_PORT 0
		173	#endif
		174
		175	#ifndef EV_USE_INOTIFY
		176	# define EV_USE_INOTIFY 0
		177	#endif
		178
		179	#ifndef EV_PID_HASHSIZE
		180	# if EV_MINIMAL
		181	# define EV_PID_HASHSIZE 1
		182	# else
		183	# define EV_PID_HASHSIZE 16
58	#endif	184	# endif
		185	#endif
59		186
60	#ifndef HAVE_REALTIME	187	#ifndef EV_INOTIFY_HASHSIZE
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
62	#endif	192	# endif
		193	#endif
		194
		195	/**/
		196
		197	#ifndef CLOCK_MONOTONIC
		198	# undef EV_USE_MONOTONIC
		199	# define EV_USE_MONOTONIC 0
		200	#endif
		201
		202	#ifndef CLOCK_REALTIME
		203	# undef EV_USE_REALTIME
		204	# define EV_USE_REALTIME 0
		205	#endif
		206
		207	#if EV_SELECT_IS_WINSOCKET
		208	# include <winsock.h>
		209	#endif
		210
		211	#if !EV_STAT_ENABLE
		212	# define EV_USE_INOTIFY 0
		213	#endif
		214
		215	#if EV_USE_INOTIFY
		216	# include <sys/inotify.h>
		217	#endif
		218
		219	/**/
63		220
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	221	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	222	#define MAX_BLOCKTIME 59.743 /* 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 */	223	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
67		224
68	#include "ev.h"	225	#if __GNUC__ >= 3
		226	# define expect(expr,value) __builtin_expect ((expr),(value))
		227	# define inline_size static inline /* inline for codesize */
		228	# if EV_MINIMAL
		229	# define noinline __attribute__ ((noinline))
		230	# define inline_speed static noinline
		231	# else
		232	# define noinline
		233	# define inline_speed static inline
		234	# endif
		235	#else
		236	# define expect(expr,value) (expr)
		237	# define inline_speed static
		238	# define inline_size static
		239	# define noinline
		240	#endif
69		241
		242	#define expect_false(expr) expect ((expr) != 0, 0)
		243	#define expect_true(expr) expect ((expr) != 0, 1)
		244
		245	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		246	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		247
		248	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		249	#define EMPTY2(a,b) /* used to suppress some warnings */
		250
70	typedef struct ev_watcher *W;	251	typedef ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	252	typedef ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	253	typedef ev_watcher_time *WT;
73		254
74	static ev_tstamp now, diff; /* monotonic clock */	255	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		256
		257	#ifdef _WIN32
		258	# include "ev_win32.c"
		259	#endif
		260
		261	/*****************************************************************************/
		262
		263	static void (*syserr_cb)(const char *msg);
		264
		265	void
		266	ev_set_syserr_cb (void (*cb)(const char *msg))
		267	{
		268	syserr_cb = cb;
		269	}
		270
		271	static void noinline
		272	syserr (const char *msg)
		273	{
		274	if (!msg)
		275	msg = "(libev) system error";
		276
		277	if (syserr_cb)
		278	syserr_cb (msg);
		279	else
		280	{
		281	perror (msg);
		282	abort ();
		283	}
		284	}
		285
		286	static void *(*alloc)(void *ptr, long size);
		287
		288	void
		289	ev_set_allocator (void *(*cb)(void *ptr, long size))
		290	{
		291	alloc = cb;
		292	}
		293
		294	inline_speed void *
		295	ev_realloc (void *ptr, long size)
		296	{
		297	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		298
		299	if (!ptr && size)
		300	{
		301	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		302	abort ();
		303	}
		304
		305	return ptr;
		306	}
		307
		308	#define ev_malloc(size) ev_realloc (0, (size))
		309	#define ev_free(ptr) ev_realloc ((ptr), 0)
		310
		311	/*****************************************************************************/
		312
		313	typedef struct
		314	{
		315	WL head;
		316	unsigned char events;
		317	unsigned char reify;
		318	#if EV_SELECT_IS_WINSOCKET
		319	SOCKET handle;
		320	#endif
		321	} ANFD;
		322
		323	typedef struct
		324	{
		325	W w;
		326	int events;
		327	} ANPENDING;
		328
		329	#if EV_USE_INOTIFY
		330	typedef struct
		331	{
		332	WL head;
		333	} ANFS;
		334	#endif
		335
		336	#if EV_MULTIPLICITY
		337
		338	struct ev_loop
		339	{
		340	ev_tstamp ev_rt_now;
		341	#define ev_rt_now ((loop)->ev_rt_now)
		342	#define VAR(name,decl) decl;
		343	#include "ev_vars.h"
		344	#undef VAR
		345	};
		346	#include "ev_wrap.h"
		347
		348	static struct ev_loop default_loop_struct;
		349	struct ev_loop *ev_default_loop_ptr;
		350
		351	#else
		352
75	ev_tstamp ev_now;	353	ev_tstamp ev_rt_now;
76	int ev_method;	354	#define VAR(name,decl) static decl;
		355	#include "ev_vars.h"
		356	#undef VAR
77		357
78	static int have_monotonic; /* runtime */	358	static int ev_default_loop_ptr;
79		359
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	360	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		361
84	/*****************************************************************************/	362	/*****************************************************************************/
85		363
86	ev_tstamp	364	ev_tstamp
87	ev_time (void)	365	ev_time (void)
88	{	366	{
89	#if HAVE_REALTIME	367	#if EV_USE_REALTIME
90	struct timespec ts;	368	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	369	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	370	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	371	#else
94	struct timeval tv;	372	struct timeval tv;
95	gettimeofday (&tv, 0);	373	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	374	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	375	#endif
98	}	376	}
99		377
100	static ev_tstamp	378	ev_tstamp inline_size
101	get_clock (void)	379	get_clock (void)
102	{	380	{
103	#if HAVE_MONOTONIC	381	#if EV_USE_MONOTONIC
104	if (have_monotonic)	382	if (expect_true (have_monotonic))
105	{	383	{
106	struct timespec ts;	384	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	385	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	386	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	387	}
110	#endif	388	#endif
111		389
112	return ev_time ();	390	return ev_time ();
113	}	391	}
114		392
		393	#if EV_MULTIPLICITY
		394	ev_tstamp
		395	ev_now (EV_P)
		396	{
		397	return ev_rt_now;
		398	}
		399	#endif
		400
		401	#define array_roundsize(type,n) (((n) | 4) & ~3)
		402
115	#define array_needsize(base,cur,cnt,init) \	403	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	404	if (expect_false ((cnt) > cur)) \
117	{ \	405	{ \
118	int newcnt = cur ? cur << 1 : 16; \	406	int newcnt = cur; \
		407	do \
		408	{ \
		409	newcnt = array_roundsize (type, newcnt << 1); \
		410	} \
		411	while ((cnt) > newcnt); \
		412	\
119	base = realloc (base, sizeof (*base) * (newcnt)); \	413	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
120	init (base + cur, newcnt - cur); \	414	init (base + cur, newcnt - cur); \
121	cur = newcnt; \	415	cur = newcnt; \
122	}	416	}
		417
		418	#define array_slim(type,stem) \
		419	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		420	{ \
		421	stem ## max = array_roundsize (stem ## cnt >> 1); \
		422	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		423	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		424	}
		425
		426	#define array_free(stem, idx) \
		427	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
123		428
124	/*****************************************************************************/	429	/*****************************************************************************/
125		430
		431	void noinline
		432	ev_feed_event (EV_P_ void *w, int revents)
		433	{
		434	W w_ = (W)w;
		435
		436	if (expect_false (w_->pending))
		437	{
		438	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		439	return;
		440	}
		441
		442	w_->pending = ++pendingcnt [ABSPRI (w_)];
		443	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		444	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		445	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		446	}
		447
		448	void inline_size
		449	queue_events (EV_P_ W *events, int eventcnt, int type)
		450	{
		451	int i;
		452
		453	for (i = 0; i < eventcnt; ++i)
		454	ev_feed_event (EV_A_ events [i], type);
		455	}
		456
		457	/*****************************************************************************/
		458
		459	void inline_size
		460	anfds_init (ANFD *base, int count)
		461	{
		462	while (count--)
		463	{
		464	base->head = 0;
		465	base->events = EV_NONE;
		466	base->reify = 0;
		467
		468	++base;
		469	}
		470	}
		471
		472	void inline_speed
		473	fd_event (EV_P_ int fd, int revents)
		474	{
		475	ANFD *anfd = anfds + fd;
		476	ev_io *w;
		477
		478	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		479	{
		480	int ev = w->events & revents;
		481
		482	if (ev)
		483	ev_feed_event (EV_A_ (W)w, ev);
		484	}
		485	}
		486
		487	void
		488	ev_feed_fd_event (EV_P_ int fd, int revents)
		489	{
		490	fd_event (EV_A_ fd, revents);
		491	}
		492
		493	void inline_size
		494	fd_reify (EV_P)
		495	{
		496	int i;
		497
		498	for (i = 0; i < fdchangecnt; ++i)
		499	{
		500	int fd = fdchanges [i];
		501	ANFD *anfd = anfds + fd;
		502	ev_io *w;
		503
		504	int events = 0;
		505
		506	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		507	events |= w->events;
		508
		509	#if EV_SELECT_IS_WINSOCKET
		510	if (events)
		511	{
		512	unsigned long argp;
		513	anfd->handle = _get_osfhandle (fd);
		514	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		515	}
		516	#endif
		517
		518	anfd->reify = 0;
		519
		520	backend_modify (EV_A_ fd, anfd->events, events);
		521	anfd->events = events;
		522	}
		523
		524	fdchangecnt = 0;
		525	}
		526
		527	void inline_size
		528	fd_change (EV_P_ int fd)
		529	{
		530	if (expect_false (anfds [fd].reify))
		531	return;
		532
		533	anfds [fd].reify = 1;
		534
		535	++fdchangecnt;
		536	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		537	fdchanges [fdchangecnt - 1] = fd;
		538	}
		539
		540	void inline_speed
		541	fd_kill (EV_P_ int fd)
		542	{
		543	ev_io *w;
		544
		545	while ((w = (ev_io *)anfds [fd].head))
		546	{
		547	ev_io_stop (EV_A_ w);
		548	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		549	}
		550	}
		551
		552	int inline_size
		553	fd_valid (int fd)
		554	{
		555	#ifdef _WIN32
		556	return _get_osfhandle (fd) != -1;
		557	#else
		558	return fcntl (fd, F_GETFD) != -1;
		559	#endif
		560	}
		561
		562	/* called on EBADF to verify fds */
		563	static void noinline
		564	fd_ebadf (EV_P)
		565	{
		566	int fd;
		567
		568	for (fd = 0; fd < anfdmax; ++fd)
		569	if (anfds [fd].events)
		570	if (!fd_valid (fd) == -1 && errno == EBADF)
		571	fd_kill (EV_A_ fd);
		572	}
		573
		574	/* called on ENOMEM in select/poll to kill some fds and retry */
		575	static void noinline
		576	fd_enomem (EV_P)
		577	{
		578	int fd;
		579
		580	for (fd = anfdmax; fd--; )
		581	if (anfds [fd].events)
		582	{
		583	fd_kill (EV_A_ fd);
		584	return;
		585	}
		586	}
		587
		588	/* usually called after fork if backend needs to re-arm all fds from scratch */
		589	static void noinline
		590	fd_rearm_all (EV_P)
		591	{
		592	int fd;
		593
		594	for (fd = 0; fd < anfdmax; ++fd)
		595	if (anfds [fd].events)
		596	{
		597	anfds [fd].events = 0;
		598	fd_change (EV_A_ fd);
		599	}
		600	}
		601
		602	/*****************************************************************************/
		603
		604	void inline_speed
		605	upheap (WT *heap, int k)
		606	{
		607	WT w = heap [k];
		608
		609	while (k && heap [k >> 1]->at > w->at)
		610	{
		611	heap [k] = heap [k >> 1];
		612	((W)heap [k])->active = k + 1;
		613	k >>= 1;
		614	}
		615
		616	heap [k] = w;
		617	((W)heap [k])->active = k + 1;
		618
		619	}
		620
		621	void inline_speed
		622	downheap (WT *heap, int N, int k)
		623	{
		624	WT w = heap [k];
		625
		626	while (k < (N >> 1))
		627	{
		628	int j = k << 1;
		629
		630	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		631	++j;
		632
		633	if (w->at <= heap [j]->at)
		634	break;
		635
		636	heap [k] = heap [j];
		637	((W)heap [k])->active = k + 1;
		638	k = j;
		639	}
		640
		641	heap [k] = w;
		642	((W)heap [k])->active = k + 1;
		643	}
		644
		645	void inline_size
		646	adjustheap (WT *heap, int N, int k)
		647	{
		648	upheap (heap, k);
		649	downheap (heap, N, k);
		650	}
		651
		652	/*****************************************************************************/
		653
126	typedef struct	654	typedef struct
127	{	655	{
128	struct ev_io *head;	656	WL head;
129	unsigned char wev, rev; /* want, received event set */
130	} ANFD;
131
132	static ANFD *anfds;
133	static int anfdmax;
134
135	static int *fdchanges;
136	static int fdchangemax, fdchangecnt;
137
138	static void
139	anfds_init (ANFD *base, int count)
140	{
141	while (count--)
142	{
143	base->head = 0;
144	base->wev = base->rev = EV_NONE;
145	++base;
146	}
147	}
148
149	typedef struct
150	{
151	W w;
152	int events;
153	} ANPENDING;
154
155	static ANPENDING *pendings;
156	static int pendingmax, pendingcnt;
157
158	static void
159	event (W w, int events)
160	{
161	if (w->active)
162	{
163	w->pending = ++pendingcnt;
164	array_needsize (pendings, pendingmax, pendingcnt, );
165	pendings [pendingcnt - 1].w = w;
166	pendings [pendingcnt - 1].events = events;
167	}
168	}
169
170	static void
171	fd_event (int fd, int events)
172	{
173	ANFD *anfd = anfds + fd;
174	struct ev_io *w;
175
176	for (w = anfd->head; w; w = w->next)
177	{
178	int ev = w->events & events;
179
180	if (ev)
181	event ((W)w, ev);
182	}
183	}
184
185	static void
186	queue_events (W *events, int eventcnt, int type)
187	{
188	int i;
189
190	for (i = 0; i < eventcnt; ++i)
191	event (events [i], type);
192	}
193
194	/* called on EBADF to verify fds */
195	static void
196	fd_recheck ()
197	{
198	int fd;
199
200	for (fd = 0; fd < anfdmax; ++fd)
201	if (anfds [fd].wev)
202	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
203	while (anfds [fd].head)
204	evio_stop (anfds [fd].head);
205	}
206
207	/*****************************************************************************/
208
209	static struct ev_timer **timers;
210	static int timermax, timercnt;
211
212	static struct ev_periodic **periodics;
213	static int periodicmax, periodiccnt;
214
215	static void
216	upheap (WT *timers, int k)
217	{
218	WT w = timers [k];
219
220	while (k && timers [k >> 1]->at > w->at)
221	{
222	timers [k] = timers [k >> 1];
223	timers [k]->active = k + 1;
224	k >>= 1;
225	}
226
227	timers [k] = w;
228	timers [k]->active = k + 1;
229
230	}
231
232	static void
233	downheap (WT *timers, int N, int k)
234	{
235	WT w = timers [k];
236
237	while (k < (N >> 1))
238	{
239	int j = k << 1;
240
241	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
242	++j;
243
244	if (w->at <= timers [j]->at)
245	break;
246
247	timers [k] = timers [j];
248	timers [k]->active = k + 1;
249	k = j;
250	}
251
252	timers [k] = w;
253	timers [k]->active = k + 1;
254	}
255
256	/*****************************************************************************/
257
258	typedef struct
259	{
260	struct ev_signal *head;
261	sig_atomic_t gotsig;	657	sig_atomic_t volatile gotsig;
262	} ANSIG;	658	} ANSIG;
263		659
264	static ANSIG *signals;	660	static ANSIG *signals;
265	static int signalmax;	661	static int signalmax;
266		662
267	static int sigpipe [2];	663	static int sigpipe [2];
268	static sig_atomic_t gotsig;	664	static sig_atomic_t volatile gotsig;
269	static struct ev_io sigev;	665	static ev_io sigev;
270		666
271	static void	667	void inline_size
272	signals_init (ANSIG *base, int count)	668	signals_init (ANSIG *base, int count)
273	{	669	{
274	while (count--)	670	while (count--)
275	{	671	{
276	base->head = 0;	672	base->head = 0;
277	base->gotsig = 0;	673	base->gotsig = 0;
		674
278	++base;	675	++base;
279	}	676	}
280	}	677	}
281		678
282	static void	679	static void
283	sighandler (int signum)	680	sighandler (int signum)
284	{	681	{
		682	#if _WIN32
		683	signal (signum, sighandler);
		684	#endif
		685
285	signals [signum - 1].gotsig = 1;	686	signals [signum - 1].gotsig = 1;
286		687
287	if (!gotsig)	688	if (!gotsig)
288	{	689	{
		690	int old_errno = errno;
289	gotsig = 1;	691	gotsig = 1;
290	write (sigpipe [1], &gotsig, 1);	692	write (sigpipe [1], &signum, 1);
		693	errno = old_errno;
291	}	694	}
		695	}
		696
		697	void noinline
		698	ev_feed_signal_event (EV_P_ int signum)
		699	{
		700	WL w;
		701
		702	#if EV_MULTIPLICITY
		703	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		704	#endif
		705
		706	--signum;
		707
		708	if (signum < 0 || signum >= signalmax)
		709	return;
		710
		711	signals [signum].gotsig = 0;
		712
		713	for (w = signals [signum].head; w; w = w->next)
		714	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
292	}	715	}
293		716
294	static void	717	static void
295	sigcb (struct ev_io *iow, int revents)	718	sigcb (EV_P_ ev_io *iow, int revents)
296	{	719	{
297	struct ev_signal *w;
298	int sig;	720	int signum;
299		721
		722	read (sigpipe [0], &revents, 1);
300	gotsig = 0;	723	gotsig = 0;
301	read (sigpipe [0], &revents, 1);
302		724
303	for (sig = signalmax; sig--; )	725	for (signum = signalmax; signum--; )
304	if (signals [sig].gotsig)	726	if (signals [signum].gotsig)
		727	ev_feed_signal_event (EV_A_ signum + 1);
		728	}
		729
		730	void inline_size
		731	fd_intern (int fd)
		732	{
		733	#ifdef _WIN32
		734	int arg = 1;
		735	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		736	#else
		737	fcntl (fd, F_SETFD, FD_CLOEXEC);
		738	fcntl (fd, F_SETFL, O_NONBLOCK);
		739	#endif
		740	}
		741
		742	static void noinline
		743	siginit (EV_P)
		744	{
		745	fd_intern (sigpipe [0]);
		746	fd_intern (sigpipe [1]);
		747
		748	ev_io_set (&sigev, sigpipe [0], EV_READ);
		749	ev_io_start (EV_A_ &sigev);
		750	ev_unref (EV_A); /* child watcher should not keep loop alive */
		751	}
		752
		753	/*****************************************************************************/
		754
		755	static ev_child *childs [EV_PID_HASHSIZE];
		756
		757	#ifndef _WIN32
		758
		759	static ev_signal childev;
		760
		761	void inline_speed
		762	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		763	{
		764	ev_child *w;
		765
		766	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		767	if (w->pid == pid || !w->pid)
305	{	768	{
306	signals [sig].gotsig = 0;	769	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
307		770	w->rpid = pid;
308	for (w = signals [sig].head; w; w = w->next)	771	w->rstatus = status;
309	event ((W)w, EV_SIGNAL);	772	ev_feed_event (EV_A_ (W)w, EV_CHILD);
310	}	773	}
311	}	774	}
312
313	static void
314	siginit (void)
315	{
316	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
317	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
318
319	/* rather than sort out wether we really need nb, set it */
320	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
321	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
322
323	evio_set (&sigev, sigpipe [0], EV_READ);
324	evio_start (&sigev);
325	}
326
327	/*****************************************************************************/
328
329	static struct ev_idle **idles;
330	static int idlemax, idlecnt;
331
332	static struct ev_prepare **prepares;
333	static int preparemax, preparecnt;
334
335	static struct ev_check **checks;
336	static int checkmax, checkcnt;
337
338	/*****************************************************************************/
339
340	static struct ev_child *childs [PID_HASHSIZE];
341	static struct ev_signal childev;
342		775
343	#ifndef WCONTINUED	776	#ifndef WCONTINUED
344	# define WCONTINUED 0	777	# define WCONTINUED 0
345	#endif	778	#endif
346		779
347	static void	780	static void
348	childcb (struct ev_signal *sw, int revents)	781	childcb (EV_P_ ev_signal *sw, int revents)
349	{	782	{
350	struct ev_child *w;
351	int pid, status;	783	int pid, status;
352		784
		785	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
353	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	786	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
354	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	787	if (!WCONTINUED
355	if (w->pid == pid || w->pid == -1)	788	|| errno != EINVAL
		789	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		790	return;
		791
		792	/* make sure we are called again until all childs have been reaped */
		793	/* we need to do it this way so that the callback gets called before we continue */
		794	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		795
		796	child_reap (EV_A_ sw, pid, pid, status);
		797	if (EV_PID_HASHSIZE > 1)
		798	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		799	}
		800
		801	#endif
		802
		803	/*****************************************************************************/
		804
		805	#if EV_USE_PORT
		806	# include "ev_port.c"
		807	#endif
		808	#if EV_USE_KQUEUE
		809	# include "ev_kqueue.c"
		810	#endif
		811	#if EV_USE_EPOLL
		812	# include "ev_epoll.c"
		813	#endif
		814	#if EV_USE_POLL
		815	# include "ev_poll.c"
		816	#endif
		817	#if EV_USE_SELECT
		818	# include "ev_select.c"
		819	#endif
		820
		821	int
		822	ev_version_major (void)
		823	{
		824	return EV_VERSION_MAJOR;
		825	}
		826
		827	int
		828	ev_version_minor (void)
		829	{
		830	return EV_VERSION_MINOR;
		831	}
		832
		833	/* return true if we are running with elevated privileges and should ignore env variables */
		834	int inline_size
		835	enable_secure (void)
		836	{
		837	#ifdef _WIN32
		838	return 0;
		839	#else
		840	return getuid () != geteuid ()
		841	|| getgid () != getegid ();
		842	#endif
		843	}
		844
		845	unsigned int
		846	ev_supported_backends (void)
		847	{
		848	unsigned int flags = 0;
		849
		850	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		851	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		852	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		853	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		854	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		855
		856	return flags;
		857	}
		858
		859	unsigned int
		860	ev_recommended_backends (void)
		861	{
		862	unsigned int flags = ev_supported_backends ();
		863
		864	#ifndef __NetBSD__
		865	/* kqueue is borked on everything but netbsd apparently */
		866	/* it usually doesn't work correctly on anything but sockets and pipes */
		867	flags &= ~EVBACKEND_KQUEUE;
		868	#endif
		869	#ifdef __APPLE__
		870	// flags &= ~EVBACKEND_KQUEUE; for documentation
		871	flags &= ~EVBACKEND_POLL;
		872	#endif
		873
		874	return flags;
		875	}
		876
		877	unsigned int
		878	ev_embeddable_backends (void)
		879	{
		880	return EVBACKEND_EPOLL
		881	| EVBACKEND_KQUEUE
		882	| EVBACKEND_PORT;
		883	}
		884
		885	unsigned int
		886	ev_backend (EV_P)
		887	{
		888	return backend;
		889	}
		890
		891	static void noinline
		892	loop_init (EV_P_ unsigned int flags)
		893	{
		894	if (!backend)
		895	{
		896	#if EV_USE_MONOTONIC
		897	{
		898	struct timespec ts;
		899	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		900	have_monotonic = 1;
		901	}
		902	#endif
		903
		904	ev_rt_now = ev_time ();
		905	mn_now = get_clock ();
		906	now_floor = mn_now;
		907	rtmn_diff = ev_rt_now - mn_now;
		908
		909	/* pid check not overridable via env */
		910	#ifndef _WIN32
		911	if (flags & EVFLAG_FORKCHECK)
		912	curpid = getpid ();
		913	#endif
		914
		915	if (!(flags & EVFLAG_NOENV)
		916	&& !enable_secure ()
		917	&& getenv ("LIBEV_FLAGS"))
		918	flags = atoi (getenv ("LIBEV_FLAGS"));
		919
		920	if (!(flags & 0x0000ffffUL))
		921	flags |= ev_recommended_backends ();
		922
		923	backend = 0;
		924	backend_fd = -1;
		925	#if EV_USE_INOTIFY
		926	fs_fd = -2;
		927	#endif
		928
		929	#if EV_USE_PORT
		930	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		931	#endif
		932	#if EV_USE_KQUEUE
		933	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		934	#endif
		935	#if EV_USE_EPOLL
		936	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		937	#endif
		938	#if EV_USE_POLL
		939	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		940	#endif
		941	#if EV_USE_SELECT
		942	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		943	#endif
		944
		945	ev_init (&sigev, sigcb);
		946	ev_set_priority (&sigev, EV_MAXPRI);
		947	}
		948	}
		949
		950	static void noinline
		951	loop_destroy (EV_P)
		952	{
		953	int i;
		954
		955	#if EV_USE_INOTIFY
		956	if (fs_fd >= 0)
		957	close (fs_fd);
		958	#endif
		959
		960	if (backend_fd >= 0)
		961	close (backend_fd);
		962
		963	#if EV_USE_PORT
		964	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		965	#endif
		966	#if EV_USE_KQUEUE
		967	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		968	#endif
		969	#if EV_USE_EPOLL
		970	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		971	#endif
		972	#if EV_USE_POLL
		973	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		974	#endif
		975	#if EV_USE_SELECT
		976	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		977	#endif
		978
		979	for (i = NUMPRI; i--; )
		980	array_free (pending, [i]);
		981
		982	/* have to use the microsoft-never-gets-it-right macro */
		983	array_free (fdchange, EMPTY0);
		984	array_free (timer, EMPTY0);
		985	#if EV_PERIODIC_ENABLE
		986	array_free (periodic, EMPTY0);
		987	#endif
		988	array_free (idle, EMPTY0);
		989	array_free (prepare, EMPTY0);
		990	array_free (check, EMPTY0);
		991
		992	backend = 0;
		993	}
		994
		995	void inline_size infy_fork (EV_P);
		996
		997	void inline_size
		998	loop_fork (EV_P)
		999	{
		1000	#if EV_USE_PORT
		1001	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1002	#endif
		1003	#if EV_USE_KQUEUE
		1004	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1005	#endif
		1006	#if EV_USE_EPOLL
		1007	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1008	#endif
		1009	#if EV_USE_INOTIFY
		1010	infy_fork (EV_A);
		1011	#endif
		1012
		1013	if (ev_is_active (&sigev))
		1014	{
		1015	/* default loop */
		1016
		1017	ev_ref (EV_A);
		1018	ev_io_stop (EV_A_ &sigev);
		1019	close (sigpipe [0]);
		1020	close (sigpipe [1]);
		1021
		1022	while (pipe (sigpipe))
		1023	syserr ("(libev) error creating pipe");
		1024
		1025	siginit (EV_A);
		1026	}
		1027
		1028	postfork = 0;
		1029	}
		1030
		1031	#if EV_MULTIPLICITY
		1032	struct ev_loop *
		1033	ev_loop_new (unsigned int flags)
		1034	{
		1035	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1036
		1037	memset (loop, 0, sizeof (struct ev_loop));
		1038
		1039	loop_init (EV_A_ flags);
		1040
		1041	if (ev_backend (EV_A))
		1042	return loop;
		1043
		1044	return 0;
		1045	}
		1046
		1047	void
		1048	ev_loop_destroy (EV_P)
		1049	{
		1050	loop_destroy (EV_A);
		1051	ev_free (loop);
		1052	}
		1053
		1054	void
		1055	ev_loop_fork (EV_P)
		1056	{
		1057	postfork = 1;
		1058	}
		1059
		1060	#endif
		1061
		1062	#if EV_MULTIPLICITY
		1063	struct ev_loop *
		1064	ev_default_loop_init (unsigned int flags)
		1065	#else
		1066	int
		1067	ev_default_loop (unsigned int flags)
		1068	#endif
		1069	{
		1070	if (sigpipe [0] == sigpipe [1])
		1071	if (pipe (sigpipe))
		1072	return 0;
		1073
		1074	if (!ev_default_loop_ptr)
		1075	{
		1076	#if EV_MULTIPLICITY
		1077	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1078	#else
		1079	ev_default_loop_ptr = 1;
		1080	#endif
		1081
		1082	loop_init (EV_A_ flags);
		1083
		1084	if (ev_backend (EV_A))
356	{	1085	{
357	w->status = status;	1086	siginit (EV_A);
358	event ((W)w, EV_CHILD);	1087
		1088	#ifndef _WIN32
		1089	ev_signal_init (&childev, childcb, SIGCHLD);
		1090	ev_set_priority (&childev, EV_MAXPRI);
		1091	ev_signal_start (EV_A_ &childev);
		1092	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1093	#endif
359	}	1094	}
		1095	else
		1096	ev_default_loop_ptr = 0;
		1097	}
		1098
		1099	return ev_default_loop_ptr;
		1100	}
		1101
		1102	void
		1103	ev_default_destroy (void)
		1104	{
		1105	#if EV_MULTIPLICITY
		1106	struct ev_loop *loop = ev_default_loop_ptr;
		1107	#endif
		1108
		1109	#ifndef _WIN32
		1110	ev_ref (EV_A); /* child watcher */
		1111	ev_signal_stop (EV_A_ &childev);
		1112	#endif
		1113
		1114	ev_ref (EV_A); /* signal watcher */
		1115	ev_io_stop (EV_A_ &sigev);
		1116
		1117	close (sigpipe [0]); sigpipe [0] = 0;
		1118	close (sigpipe [1]); sigpipe [1] = 0;
		1119
		1120	loop_destroy (EV_A);
		1121	}
		1122
		1123	void
		1124	ev_default_fork (void)
		1125	{
		1126	#if EV_MULTIPLICITY
		1127	struct ev_loop *loop = ev_default_loop_ptr;
		1128	#endif
		1129
		1130	if (backend)
		1131	postfork = 1;
360	}	1132	}
361		1133
362	/*****************************************************************************/	1134	/*****************************************************************************/
363		1135
364	#if HAVE_EPOLL	1136	int inline_size
365	# include "ev_epoll.c"	1137	any_pending (EV_P)
366	#endif
367	#if HAVE_SELECT
368	# include "ev_select.c"
369	#endif
370
371	int ev_init (int flags)
372	{	1138	{
373	#if HAVE_MONOTONIC	1139	int pri;
374	{
375	struct timespec ts;
376	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
377	have_monotonic = 1;
378	}
379	#endif
380		1140
381	ev_now = ev_time ();	1141	for (pri = NUMPRI; pri--; )
382	now = get_clock ();	1142	if (pendingcnt [pri])
383	diff = ev_now - now;	1143	return 1;
384		1144
385	if (pipe (sigpipe))
386	return 0;	1145	return 0;
387
388	ev_method = EVMETHOD_NONE;
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
391	#endif
392	#if HAVE_SELECT
393	if (ev_method == EVMETHOD_NONE) select_init (flags);
394	#endif
395
396	if (ev_method)
397	{
398	evw_init (&sigev, sigcb);
399	siginit ();
400
401	evsignal_init (&childev, childcb, SIGCHLD);
402	evsignal_start (&childev);
403	}
404
405	return ev_method;
406	}	1146	}
407		1147
408	/*****************************************************************************/	1148	void inline_speed
409		1149	call_pending (EV_P)
410	void ev_prefork (void)
411	{	1150	{
412	/* nop */
413	}
414
415	void ev_postfork_parent (void)
416	{
417	/* nop */
418	}
419
420	void ev_postfork_child (void)
421	{
422	#if HAVE_EPOLL
423	if (ev_method == EVMETHOD_EPOLL)
424	epoll_postfork_child ();
425	#endif
426
427	evio_stop (&sigev);
428	close (sigpipe [0]);
429	close (sigpipe [1]);
430	pipe (sigpipe);
431	siginit ();
432	}
433
434	/*****************************************************************************/
435
436	static void
437	fd_reify (void)
438	{
439	int i;	1151	int pri;
440		1152
441	for (i = 0; i < fdchangecnt; ++i)	1153	for (pri = NUMPRI; pri--; )
		1154	while (pendingcnt [pri])
442	{	1155	{
443	int fd = fdchanges [i];	1156	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
444	ANFD *anfd = anfds + fd;
445	struct ev_io *w;
446		1157
447	int wev = 0;	1158	if (expect_true (p->w))
448
449	for (w = anfd->head; w; w = w->next)
450	wev |= w->events;
451
452	if (anfd->wev != wev)
453	{	1159	{
454	method_modify (fd, anfd->wev, wev);	1160	/*assert (("non-pending watcher on pending list", p->w->pending));*/
455	anfd->wev = wev;
456	}
457	}
458		1161
459	fdchangecnt = 0;
460	}
461
462	static void
463	call_pending ()
464	{
465	while (pendingcnt)
466	{
467	ANPENDING *p = pendings + --pendingcnt;
468
469	if (p->w)
470	{
471	p->w->pending = 0;	1162	p->w->pending = 0;
472	p->w->cb (p->w, p->events);	1163	EV_CB_INVOKE (p->w, p->events);
473	}	1164	}
474	}	1165	}
475	}	1166	}
476		1167
477	static void	1168	void inline_size
478	timers_reify ()	1169	timers_reify (EV_P)
479	{	1170	{
480	while (timercnt && timers [0]->at <= now)	1171	while (timercnt && ((WT)timers [0])->at <= mn_now)
481	{	1172	{
482	struct ev_timer *w = timers [0];	1173	ev_timer *w = timers [0];
483		1174
484	event ((W)w, EV_TIMEOUT);	1175	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
485		1176
486	/* first reschedule or stop timer */	1177	/* first reschedule or stop timer */
487	if (w->repeat)	1178	if (w->repeat)
488	{	1179	{
		1180	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1181
489	w->at = now + w->repeat;	1182	((WT)w)->at += w->repeat;
490	assert (("timer timeout in the past, negative repeat?", w->at > now));	1183	if (((WT)w)->at < mn_now)
		1184	((WT)w)->at = mn_now;
		1185
491	downheap ((WT *)timers, timercnt, 0);	1186	downheap ((WT *)timers, timercnt, 0);
492	}	1187	}
493	else	1188	else
494	evtimer_stop (w); /* nonrepeating: stop timer */	1189	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
495	}
496	}
497		1190
498	static void	1191	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1192	}
		1193	}
		1194
		1195	#if EV_PERIODIC_ENABLE
		1196	void inline_size
499	periodics_reify ()	1197	periodics_reify (EV_P)
500	{	1198	{
501	while (periodiccnt && periodics [0]->at <= ev_now)	1199	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
502	{	1200	{
503	struct ev_periodic *w = periodics [0];	1201	ev_periodic *w = periodics [0];
		1202
		1203	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
504		1204
505	/* first reschedule or stop timer */	1205	/* first reschedule or stop timer */
506	if (w->interval)	1206	if (w->reschedule_cb)
507	{	1207	{
		1208	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1209	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1210	downheap ((WT *)periodics, periodiccnt, 0);
		1211	}
		1212	else if (w->interval)
		1213	{
508	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1214	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
509	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1215	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
510	downheap ((WT *)periodics, periodiccnt, 0);	1216	downheap ((WT *)periodics, periodiccnt, 0);
511	}	1217	}
512	else	1218	else
513	evperiodic_stop (w); /* nonrepeating: stop timer */	1219	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
514		1220
515	event ((W)w, EV_TIMEOUT);	1221	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
516	}	1222	}
517	}	1223	}
518		1224
519	static void	1225	static void noinline
520	periodics_reschedule (ev_tstamp diff)	1226	periodics_reschedule (EV_P)
521	{	1227	{
522	int i;	1228	int i;
523		1229
524	/* adjust periodics after time jump */	1230	/* adjust periodics after time jump */
525	for (i = 0; i < periodiccnt; ++i)	1231	for (i = 0; i < periodiccnt; ++i)
526	{	1232	{
527	struct ev_periodic *w = periodics [i];	1233	ev_periodic *w = periodics [i];
528		1234
		1235	if (w->reschedule_cb)
		1236	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
529	if (w->interval)	1237	else if (w->interval)
		1238	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1239	}
		1240
		1241	/* now rebuild the heap */
		1242	for (i = periodiccnt >> 1; i--; )
		1243	downheap ((WT *)periodics, periodiccnt, i);
		1244	}
		1245	#endif
		1246
		1247	int inline_size
		1248	time_update_monotonic (EV_P)
		1249	{
		1250	mn_now = get_clock ();
		1251
		1252	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1253	{
		1254	ev_rt_now = rtmn_diff + mn_now;
		1255	return 0;
		1256	}
		1257	else
		1258	{
		1259	now_floor = mn_now;
		1260	ev_rt_now = ev_time ();
		1261	return 1;
		1262	}
		1263	}
		1264
		1265	void inline_size
		1266	time_update (EV_P)
		1267	{
		1268	int i;
		1269
		1270	#if EV_USE_MONOTONIC
		1271	if (expect_true (have_monotonic))
		1272	{
		1273	if (time_update_monotonic (EV_A))
530	{	1274	{
531	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1275	ev_tstamp odiff = rtmn_diff;
532		1276
533	if (fabs (diff) >= 1e-4)	1277	/* loop a few times, before making important decisions.
		1278	* on the choice of "4": one iteration isn't enough,
		1279	* in case we get preempted during the calls to
		1280	* ev_time and get_clock. a second call is almost guaranteed
		1281	* to succeed in that case, though. and looping a few more times
		1282	* doesn't hurt either as we only do this on time-jumps or
		1283	* in the unlikely event of having been preempted here.
		1284	*/
		1285	for (i = 4; --i; )
534	{	1286	{
535	evperiodic_stop (w);	1287	rtmn_diff = ev_rt_now - mn_now;
536	evperiodic_start (w);
537		1288
538	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1289	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1290	return; /* all is well */
		1291
		1292	ev_rt_now = ev_time ();
		1293	mn_now = get_clock ();
		1294	now_floor = mn_now;
539	}	1295	}
		1296
		1297	# if EV_PERIODIC_ENABLE
		1298	periodics_reschedule (EV_A);
		1299	# endif
		1300	/* no timer adjustment, as the monotonic clock doesn't jump */
		1301	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
540	}	1302	}
541	}	1303	}
542	}	1304	else
543		1305	#endif
544	static void	1306	{
545	time_update ()
546	{
547	int i;
548
549	ev_now = ev_time ();	1307	ev_rt_now = ev_time ();
550		1308
551	if (have_monotonic)	1309	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
552	{
553	ev_tstamp odiff = diff;
554
555	for (i = 4; --i; ) /* loop a few times, before making important decisions */
556	{	1310	{
557	now = get_clock ();	1311	#if EV_PERIODIC_ENABLE
558	diff = ev_now - now;	1312	periodics_reschedule (EV_A);
		1313	#endif
559		1314
560	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1315	/* adjust timers. this is easy, as the offset is the same for all of them */
561	return; /* all is well */	1316	for (i = 0; i < timercnt; ++i)
562		1317	((WT)timers [i])->at += ev_rt_now - mn_now;
563	ev_now = ev_time ();
564	}	1318	}
565		1319
566	periodics_reschedule (diff - odiff);	1320	mn_now = ev_rt_now;
567	/* no timer adjustment, as the monotonic clock doesn't jump */
568	}
569	else
570	{	1321	}
571	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1322	}
		1323
		1324	void
		1325	ev_ref (EV_P)
		1326	{
		1327	++activecnt;
		1328	}
		1329
		1330	void
		1331	ev_unref (EV_P)
		1332	{
		1333	--activecnt;
		1334	}
		1335
		1336	static int loop_done;
		1337
		1338	void
		1339	ev_loop (EV_P_ int flags)
		1340	{
		1341	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1342	? EVUNLOOP_ONE
		1343	: EVUNLOOP_CANCEL;
		1344
		1345	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1346
		1347	while (expect_false (!activecnt))
		1348	{
		1349	#ifndef _WIN32
		1350	if (expect_false (curpid)) /* penalise the forking check even more */
		1351	if (expect_false (getpid () != curpid))
		1352	{
		1353	curpid = getpid ();
		1354	postfork = 1;
		1355	}
		1356	#endif
		1357
		1358	#if EV_FORK_ENABLE
		1359	/* we might have forked, so queue fork handlers */
		1360	if (expect_false (postfork))
		1361	if (forkcnt)
		1362	{
		1363	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1364	call_pending (EV_A);
		1365	}
		1366	#endif
		1367
		1368	/* queue check watchers (and execute them) */
		1369	if (expect_false (preparecnt))
572	{	1370	{
573	periodics_reschedule (ev_now - now);	1371	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
574		1372	call_pending (EV_A);
575	/* adjust timers. this is easy, as the offset is the same for all */
576	for (i = 0; i < timercnt; ++i)
577	timers [i]->at += diff;
578	}	1373	}
579		1374
580	now = ev_now;	1375	if (expect_false (!activecnt))
581	}	1376	break;
582	}
583		1377
584	int ev_loop_done;	1378	/* we might have forked, so reify kernel state if necessary */
585		1379	if (expect_false (postfork))
586	void ev_loop (int flags)	1380	loop_fork (EV_A);
587	{
588	double block;
589	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
590
591	do
592	{
593	/* queue check watchers (and execute them) */
594	if (preparecnt)
595	{
596	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
597	call_pending ();
598	}
599		1381
600	/* update fd-related kernel structures */	1382	/* update fd-related kernel structures */
601	fd_reify ();	1383	fd_reify (EV_A);
602		1384
603	/* calculate blocking time */	1385	/* calculate blocking time */
		1386	{
		1387	ev_tstamp block;
604		1388
605	/* we only need this for !monotonic clockor timers, but as we basically	1389	if (expect_false (flags & EVLOOP_NONBLOCK || idlecnt || !activecnt))
606	always have timers, we just calculate it always */	1390	block = 0.; /* do not block at all */
607	ev_now = ev_time ();
608
609	if (flags & EVLOOP_NONBLOCK || idlecnt)
610	block = 0.;
611	else	1391	else
612	{	1392	{
		1393	/* update time to cancel out callback processing overhead */
		1394	#if EV_USE_MONOTONIC
		1395	if (expect_true (have_monotonic))
		1396	time_update_monotonic (EV_A);
		1397	else
		1398	#endif
		1399	{
		1400	ev_rt_now = ev_time ();
		1401	mn_now = ev_rt_now;
		1402	}
		1403
613	block = MAX_BLOCKTIME;	1404	block = MAX_BLOCKTIME;
614		1405
615	if (timercnt)	1406	if (timercnt)
616	{	1407	{
617	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1408	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
618	if (block > to) block = to;	1409	if (block > to) block = to;
619	}	1410	}
620		1411
		1412	#if EV_PERIODIC_ENABLE
621	if (periodiccnt)	1413	if (periodiccnt)
622	{	1414	{
623	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1415	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
624	if (block > to) block = to;	1416	if (block > to) block = to;
625	}	1417	}
		1418	#endif
626		1419
627	if (block < 0.) block = 0.;	1420	if (expect_false (block < 0.)) block = 0.;
628	}	1421	}
629		1422
630	method_poll (block);	1423	backend_poll (EV_A_ block);
		1424	}
631		1425
632	/* update ev_now, do magic */	1426	/* update ev_rt_now, do magic */
633	time_update ();	1427	time_update (EV_A);
634		1428
635	/* queue pending timers and reschedule them */	1429	/* queue pending timers and reschedule them */
636	timers_reify (); /* relative timers called last */	1430	timers_reify (EV_A); /* relative timers called last */
		1431	#if EV_PERIODIC_ENABLE
637	periodics_reify (); /* absolute timers called first */	1432	periodics_reify (EV_A); /* absolute timers called first */
		1433	#endif
638		1434
639	/* queue idle watchers unless io or timers are pending */	1435	/* queue idle watchers unless other events are pending */
640	if (!pendingcnt)	1436	if (idlecnt && !any_pending (EV_A))
641	queue_events ((W *)idles, idlecnt, EV_IDLE);	1437	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
642		1438
643	/* queue check watchers, to be executed first */	1439	/* queue check watchers, to be executed first */
644	if (checkcnt)	1440	if (expect_false (checkcnt))
645	queue_events ((W *)checks, checkcnt, EV_CHECK);	1441	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
646		1442
647	call_pending ();	1443	call_pending (EV_A);
648	}
649	while (!ev_loop_done);
650		1444
651	if (ev_loop_done != 2)	1445	if (expect_false (loop_done))
		1446	break;
		1447	}
		1448
		1449	if (loop_done == EVUNLOOP_ONE)
		1450	loop_done = EVUNLOOP_CANCEL;
		1451	}
		1452
		1453	void
		1454	ev_unloop (EV_P_ int how)
		1455	{
652	ev_loop_done = 0;	1456	loop_done = how;
653	}	1457	}
654		1458
655	/*****************************************************************************/	1459	/*****************************************************************************/
656		1460
657	static void	1461	void inline_size
658	wlist_add (WL *head, WL elem)	1462	wlist_add (WL *head, WL elem)
659	{	1463	{
660	elem->next = *head;	1464	elem->next = *head;
661	*head = elem;	1465	*head = elem;
662	}	1466	}
663		1467
664	static void	1468	void inline_size
665	wlist_del (WL *head, WL elem)	1469	wlist_del (WL *head, WL elem)
666	{	1470	{
667	while (*head)	1471	while (*head)
668	{	1472	{
669	if (*head == elem)	1473	if (*head == elem)
…		…
674		1478
675	head = &(*head)->next;	1479	head = &(*head)->next;
676	}	1480	}
677	}	1481	}
678		1482
679	static void	1483	void inline_speed
680	ev_clear (W w)	1484	ev_clear_pending (EV_P_ W w)
681	{	1485	{
682	if (w->pending)	1486	if (w->pending)
683	{	1487	{
684	pendings [w->pending - 1].w = 0;	1488	pendings [ABSPRI (w)][w->pending - 1].w = 0;
685	w->pending = 0;	1489	w->pending = 0;
686	}	1490	}
687	}	1491	}
688		1492
689	static void	1493	void inline_speed
690	ev_start (W w, int active)	1494	ev_start (EV_P_ W w, int active)
691	{	1495	{
		1496	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1497	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1498
692	w->active = active;	1499	w->active = active;
		1500	ev_ref (EV_A);
693	}	1501	}
694		1502
695	static void	1503	void inline_size
696	ev_stop (W w)	1504	ev_stop (EV_P_ W w)
697	{	1505	{
		1506	ev_unref (EV_A);
698	w->active = 0;	1507	w->active = 0;
699	}	1508	}
700		1509
701	/*****************************************************************************/	1510	/*****************************************************************************/
702		1511
703	void	1512	void
704	evio_start (struct ev_io *w)	1513	ev_io_start (EV_P_ ev_io *w)
705	{	1514	{
706	if (ev_is_active (w))
707	return;
708
709	int fd = w->fd;	1515	int fd = w->fd;
710		1516
		1517	if (expect_false (ev_is_active (w)))
		1518	return;
		1519
		1520	assert (("ev_io_start called with negative fd", fd >= 0));
		1521
711	ev_start ((W)w, 1);	1522	ev_start (EV_A_ (W)w, 1);
712	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1523	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
713	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1524	wlist_add ((WL *)&anfds[fd].head, (WL)w);
714		1525
715	++fdchangecnt;	1526	fd_change (EV_A_ fd);
716	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
717	fdchanges [fdchangecnt - 1] = fd;
718	}	1527	}
719		1528
720	void	1529	void
721	evio_stop (struct ev_io *w)	1530	ev_io_stop (EV_P_ ev_io *w)
722	{	1531	{
723	ev_clear ((W)w);	1532	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1533	if (expect_false (!ev_is_active (w)))
725	return;	1534	return;
		1535
		1536	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
726		1537
727	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1538	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
728	ev_stop ((W)w);	1539	ev_stop (EV_A_ (W)w);
729		1540
730	++fdchangecnt;	1541	fd_change (EV_A_ w->fd);
731	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
732	fdchanges [fdchangecnt - 1] = w->fd;
733	}	1542	}
734		1543
735	void	1544	void
736	evtimer_start (struct ev_timer *w)	1545	ev_timer_start (EV_P_ ev_timer *w)
737	{	1546	{
738	if (ev_is_active (w))	1547	if (expect_false (ev_is_active (w)))
739	return;	1548	return;
740		1549
741	w->at += now;	1550	((WT)w)->at += mn_now;
742		1551
743	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1552	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
744		1553
745	ev_start ((W)w, ++timercnt);	1554	ev_start (EV_A_ (W)w, ++timercnt);
746	array_needsize (timers, timermax, timercnt, );	1555	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
747	timers [timercnt - 1] = w;	1556	timers [timercnt - 1] = w;
748	upheap ((WT *)timers, timercnt - 1);	1557	upheap ((WT *)timers, timercnt - 1);
749	}
750		1558
		1559	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1560	}
		1561
751	void	1562	void
752	evtimer_stop (struct ev_timer *w)	1563	ev_timer_stop (EV_P_ ev_timer *w)
753	{	1564	{
754	ev_clear ((W)w);	1565	ev_clear_pending (EV_A_ (W)w);
755	if (!ev_is_active (w))	1566	if (expect_false (!ev_is_active (w)))
756	return;	1567	return;
757		1568
758	if (w->active < timercnt--)	1569	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1570
		1571	{
		1572	int active = ((W)w)->active;
		1573
		1574	if (expect_true (--active < --timercnt))
759	{	1575	{
760	timers [w->active - 1] = timers [timercnt];	1576	timers [active] = timers [timercnt];
761	downheap ((WT *)timers, timercnt, w->active - 1);	1577	adjustheap ((WT *)timers, timercnt, active);
762	}	1578	}
		1579	}
763		1580
764	w->at = w->repeat;	1581	((WT)w)->at -= mn_now;
765		1582
766	ev_stop ((W)w);	1583	ev_stop (EV_A_ (W)w);
767	}	1584	}
768		1585
769	void	1586	void
770	evtimer_again (struct ev_timer *w)	1587	ev_timer_again (EV_P_ ev_timer *w)
771	{	1588	{
772	if (ev_is_active (w))	1589	if (ev_is_active (w))
773	{	1590	{
774	if (w->repeat)	1591	if (w->repeat)
775	{	1592	{
776	w->at = now + w->repeat;	1593	((WT)w)->at = mn_now + w->repeat;
777	downheap ((WT *)timers, timercnt, w->active - 1);	1594	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
778	}	1595	}
779	else	1596	else
780	evtimer_stop (w);	1597	ev_timer_stop (EV_A_ w);
781	}	1598	}
782	else if (w->repeat)	1599	else if (w->repeat)
		1600	{
		1601	w->at = w->repeat;
783	evtimer_start (w);	1602	ev_timer_start (EV_A_ w);
		1603	}
784	}	1604	}
785		1605
		1606	#if EV_PERIODIC_ENABLE
786	void	1607	void
787	evperiodic_start (struct ev_periodic *w)	1608	ev_periodic_start (EV_P_ ev_periodic *w)
788	{	1609	{
789	if (ev_is_active (w))	1610	if (expect_false (ev_is_active (w)))
790	return;	1611	return;
791		1612
792	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1613	if (w->reschedule_cb)
793		1614	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1615	else if (w->interval)
		1616	{
		1617	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
794	/* this formula differs from the one in periodic_reify because we do not always round up */	1618	/* this formula differs from the one in periodic_reify because we do not always round up */
795	if (w->interval)
796	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1619	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1620	}
797		1621
798	ev_start ((W)w, ++periodiccnt);	1622	ev_start (EV_A_ (W)w, ++periodiccnt);
799	array_needsize (periodics, periodicmax, periodiccnt, );	1623	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
800	periodics [periodiccnt - 1] = w;	1624	periodics [periodiccnt - 1] = w;
801	upheap ((WT *)periodics, periodiccnt - 1);	1625	upheap ((WT *)periodics, periodiccnt - 1);
802	}
803		1626
		1627	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1628	}
		1629
804	void	1630	void
805	evperiodic_stop (struct ev_periodic *w)	1631	ev_periodic_stop (EV_P_ ev_periodic *w)
806	{	1632	{
807	ev_clear ((W)w);	1633	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1634	if (expect_false (!ev_is_active (w)))
809	return;	1635	return;
810		1636
811	if (w->active < periodiccnt--)	1637	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1638
		1639	{
		1640	int active = ((W)w)->active;
		1641
		1642	if (expect_true (--active < --periodiccnt))
812	{	1643	{
813	periodics [w->active - 1] = periodics [periodiccnt];	1644	periodics [active] = periodics [periodiccnt];
814	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1645	adjustheap ((WT *)periodics, periodiccnt, active);
815	}	1646	}
		1647	}
816		1648
817	ev_stop ((W)w);	1649	ev_stop (EV_A_ (W)w);
818	}	1650	}
819		1651
820	void	1652	void
		1653	ev_periodic_again (EV_P_ ev_periodic *w)
		1654	{
		1655	/* TODO: use adjustheap and recalculation */
		1656	ev_periodic_stop (EV_A_ w);
		1657	ev_periodic_start (EV_A_ w);
		1658	}
		1659	#endif
		1660
		1661	#ifndef SA_RESTART
		1662	# define SA_RESTART 0
		1663	#endif
		1664
		1665	void
821	evsignal_start (struct ev_signal *w)	1666	ev_signal_start (EV_P_ ev_signal *w)
822	{	1667	{
		1668	#if EV_MULTIPLICITY
		1669	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1670	#endif
823	if (ev_is_active (w))	1671	if (expect_false (ev_is_active (w)))
824	return;	1672	return;
825		1673
		1674	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1675
826	ev_start ((W)w, 1);	1676	ev_start (EV_A_ (W)w, 1);
827	array_needsize (signals, signalmax, w->signum, signals_init);	1677	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
828	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1678	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
829		1679
830	if (!w->next)	1680	if (!((WL)w)->next)
831	{	1681	{
		1682	#if _WIN32
		1683	signal (w->signum, sighandler);
		1684	#else
832	struct sigaction sa;	1685	struct sigaction sa;
833	sa.sa_handler = sighandler;	1686	sa.sa_handler = sighandler;
834	sigfillset (&sa.sa_mask);	1687	sigfillset (&sa.sa_mask);
835	sa.sa_flags = 0;	1688	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
836	sigaction (w->signum, &sa, 0);	1689	sigaction (w->signum, &sa, 0);
		1690	#endif
837	}	1691	}
838	}	1692	}
839		1693
840	void	1694	void
841	evsignal_stop (struct ev_signal *w)	1695	ev_signal_stop (EV_P_ ev_signal *w)
842	{	1696	{
843	ev_clear ((W)w);	1697	ev_clear_pending (EV_A_ (W)w);
844	if (!ev_is_active (w))	1698	if (expect_false (!ev_is_active (w)))
845	return;	1699	return;
846		1700
847	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1701	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
848	ev_stop ((W)w);	1702	ev_stop (EV_A_ (W)w);
849		1703
850	if (!signals [w->signum - 1].head)	1704	if (!signals [w->signum - 1].head)
851	signal (w->signum, SIG_DFL);	1705	signal (w->signum, SIG_DFL);
852	}	1706	}
853		1707
854	void evidle_start (struct ev_idle *w)	1708	void
		1709	ev_child_start (EV_P_ ev_child *w)
855	{	1710	{
		1711	#if EV_MULTIPLICITY
		1712	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1713	#endif
856	if (ev_is_active (w))	1714	if (expect_false (ev_is_active (w)))
857	return;	1715	return;
858		1716
		1717	ev_start (EV_A_ (W)w, 1);
		1718	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1719	}
		1720
		1721	void
		1722	ev_child_stop (EV_P_ ev_child *w)
		1723	{
		1724	ev_clear_pending (EV_A_ (W)w);
		1725	if (expect_false (!ev_is_active (w)))
		1726	return;
		1727
		1728	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1729	ev_stop (EV_A_ (W)w);
		1730	}
		1731
		1732	#if EV_STAT_ENABLE
		1733
		1734	# ifdef _WIN32
		1735	# undef lstat
		1736	# define lstat(a,b) _stati64 (a,b)
		1737	# endif
		1738
		1739	#define DEF_STAT_INTERVAL 5.0074891
		1740	#define MIN_STAT_INTERVAL 0.1074891
		1741
		1742	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1743
		1744	#if EV_USE_INOTIFY
		1745	# define EV_INOTIFY_BUFSIZE 8192
		1746
		1747	static void noinline
		1748	infy_add (EV_P_ ev_stat *w)
		1749	{
		1750	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		1751
		1752	if (w->wd < 0)
		1753	{
		1754	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1755
		1756	/* monitor some parent directory for speedup hints */
		1757	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1758	{
		1759	char path [4096];
		1760	strcpy (path, w->path);
		1761
		1762	do
		1763	{
		1764	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1765	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1766
		1767	char *pend = strrchr (path, '/');
		1768
		1769	if (!pend)
		1770	break; /* whoops, no '/', complain to your admin */
		1771
		1772	*pend = 0;
		1773	w->wd = inotify_add_watch (fs_fd, path, mask);
		1774	}
		1775	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1776	}
		1777	}
		1778	else
		1779	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1780
		1781	if (w->wd >= 0)
		1782	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1783	}
		1784
		1785	static void noinline
		1786	infy_del (EV_P_ ev_stat *w)
		1787	{
		1788	int slot;
		1789	int wd = w->wd;
		1790
		1791	if (wd < 0)
		1792	return;
		1793
		1794	w->wd = -2;
		1795	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1796	wlist_del (&fs_hash [slot].head, (WL)w);
		1797
		1798	/* remove this watcher, if others are watching it, they will rearm */
		1799	inotify_rm_watch (fs_fd, wd);
		1800	}
		1801
		1802	static void noinline
		1803	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1804	{
		1805	if (slot < 0)
		1806	/* overflow, need to check for all hahs slots */
		1807	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1808	infy_wd (EV_A_ slot, wd, ev);
		1809	else
		1810	{
		1811	WL w_;
		1812
		1813	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1814	{
		1815	ev_stat *w = (ev_stat *)w_;
		1816	w_ = w_->next; /* lets us remove this watcher and all before it */
		1817
		1818	if (w->wd == wd || wd == -1)
		1819	{
		1820	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1821	{
		1822	w->wd = -1;
		1823	infy_add (EV_A_ w); /* re-add, no matter what */
		1824	}
		1825
		1826	stat_timer_cb (EV_A_ &w->timer, 0);
		1827	}
		1828	}
		1829	}
		1830	}
		1831
		1832	static void
		1833	infy_cb (EV_P_ ev_io *w, int revents)
		1834	{
		1835	char buf [EV_INOTIFY_BUFSIZE];
		1836	struct inotify_event *ev = (struct inotify_event *)buf;
		1837	int ofs;
		1838	int len = read (fs_fd, buf, sizeof (buf));
		1839
		1840	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1841	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1842	}
		1843
		1844	void inline_size
		1845	infy_init (EV_P)
		1846	{
		1847	if (fs_fd != -2)
		1848	return;
		1849
		1850	fs_fd = inotify_init ();
		1851
		1852	if (fs_fd >= 0)
		1853	{
		1854	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1855	ev_set_priority (&fs_w, EV_MAXPRI);
		1856	ev_io_start (EV_A_ &fs_w);
		1857	}
		1858	}
		1859
		1860	void inline_size
		1861	infy_fork (EV_P)
		1862	{
		1863	int slot;
		1864
		1865	if (fs_fd < 0)
		1866	return;
		1867
		1868	close (fs_fd);
		1869	fs_fd = inotify_init ();
		1870
		1871	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1872	{
		1873	WL w_ = fs_hash [slot].head;
		1874	fs_hash [slot].head = 0;
		1875
		1876	while (w_)
		1877	{
		1878	ev_stat *w = (ev_stat *)w_;
		1879	w_ = w_->next; /* lets us add this watcher */
		1880
		1881	w->wd = -1;
		1882
		1883	if (fs_fd >= 0)
		1884	infy_add (EV_A_ w); /* re-add, no matter what */
		1885	else
		1886	ev_timer_start (EV_A_ &w->timer);
		1887	}
		1888
		1889	}
		1890	}
		1891
		1892	#endif
		1893
		1894	void
		1895	ev_stat_stat (EV_P_ ev_stat *w)
		1896	{
		1897	if (lstat (w->path, &w->attr) < 0)
		1898	w->attr.st_nlink = 0;
		1899	else if (!w->attr.st_nlink)
		1900	w->attr.st_nlink = 1;
		1901	}
		1902
		1903	static void noinline
		1904	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1905	{
		1906	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1907
		1908	/* we copy this here each the time so that */
		1909	/* prev has the old value when the callback gets invoked */
		1910	w->prev = w->attr;
		1911	ev_stat_stat (EV_A_ w);
		1912
		1913	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		1914	if (
		1915	w->prev.st_dev != w->attr.st_dev
		1916	|| w->prev.st_ino != w->attr.st_ino
		1917	|| w->prev.st_mode != w->attr.st_mode
		1918	|| w->prev.st_nlink != w->attr.st_nlink
		1919	|| w->prev.st_uid != w->attr.st_uid
		1920	|| w->prev.st_gid != w->attr.st_gid
		1921	|| w->prev.st_rdev != w->attr.st_rdev
		1922	|| w->prev.st_size != w->attr.st_size
		1923	|| w->prev.st_atime != w->attr.st_atime
		1924	|| w->prev.st_mtime != w->attr.st_mtime
		1925	|| w->prev.st_ctime != w->attr.st_ctime
		1926	) {
		1927	#if EV_USE_INOTIFY
		1928	infy_del (EV_A_ w);
		1929	infy_add (EV_A_ w);
		1930	ev_stat_stat (EV_A_ w); /* avoid race... */
		1931	#endif
		1932
		1933	ev_feed_event (EV_A_ w, EV_STAT);
		1934	}
		1935	}
		1936
		1937	void
		1938	ev_stat_start (EV_P_ ev_stat *w)
		1939	{
		1940	if (expect_false (ev_is_active (w)))
		1941	return;
		1942
		1943	/* since we use memcmp, we need to clear any padding data etc. */
		1944	memset (&w->prev, 0, sizeof (ev_statdata));
		1945	memset (&w->attr, 0, sizeof (ev_statdata));
		1946
		1947	ev_stat_stat (EV_A_ w);
		1948
		1949	if (w->interval < MIN_STAT_INTERVAL)
		1950	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1951
		1952	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1953	ev_set_priority (&w->timer, ev_priority (w));
		1954
		1955	#if EV_USE_INOTIFY
		1956	infy_init (EV_A);
		1957
		1958	if (fs_fd >= 0)
		1959	infy_add (EV_A_ w);
		1960	else
		1961	#endif
		1962	ev_timer_start (EV_A_ &w->timer);
		1963
		1964	ev_start (EV_A_ (W)w, 1);
		1965	}
		1966
		1967	void
		1968	ev_stat_stop (EV_P_ ev_stat *w)
		1969	{
		1970	ev_clear_pending (EV_A_ (W)w);
		1971	if (expect_false (!ev_is_active (w)))
		1972	return;
		1973
		1974	#if EV_USE_INOTIFY
		1975	infy_del (EV_A_ w);
		1976	#endif
		1977	ev_timer_stop (EV_A_ &w->timer);
		1978
		1979	ev_stop (EV_A_ (W)w);
		1980	}
		1981	#endif
		1982
		1983	void
		1984	ev_idle_start (EV_P_ ev_idle *w)
		1985	{
		1986	if (expect_false (ev_is_active (w)))
		1987	return;
		1988
859	ev_start ((W)w, ++idlecnt);	1989	ev_start (EV_A_ (W)w, ++idlecnt);
860	array_needsize (idles, idlemax, idlecnt, );	1990	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
861	idles [idlecnt - 1] = w;	1991	idles [idlecnt - 1] = w;
862	}	1992	}
863		1993
864	void evidle_stop (struct ev_idle *w)	1994	void
		1995	ev_idle_stop (EV_P_ ev_idle *w)
865	{	1996	{
866	ev_clear ((W)w);	1997	ev_clear_pending (EV_A_ (W)w);
867	if (ev_is_active (w))	1998	if (expect_false (!ev_is_active (w)))
868	return;	1999	return;
869		2000
		2001	{
		2002	int active = ((W)w)->active;
870	idles [w->active - 1] = idles [--idlecnt];	2003	idles [active - 1] = idles [--idlecnt];
		2004	((W)idles [active - 1])->active = active;
		2005	}
		2006
871	ev_stop ((W)w);	2007	ev_stop (EV_A_ (W)w);
872	}	2008	}
873		2009
		2010	void
874	void evprepare_start (struct ev_prepare *w)	2011	ev_prepare_start (EV_P_ ev_prepare *w)
875	{	2012	{
876	if (ev_is_active (w))	2013	if (expect_false (ev_is_active (w)))
877	return;	2014	return;
878		2015
879	ev_start ((W)w, ++preparecnt);	2016	ev_start (EV_A_ (W)w, ++preparecnt);
880	array_needsize (prepares, preparemax, preparecnt, );	2017	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
881	prepares [preparecnt - 1] = w;	2018	prepares [preparecnt - 1] = w;
882	}	2019	}
883		2020
		2021	void
884	void evprepare_stop (struct ev_prepare *w)	2022	ev_prepare_stop (EV_P_ ev_prepare *w)
885	{	2023	{
886	ev_clear ((W)w);	2024	ev_clear_pending (EV_A_ (W)w);
887	if (ev_is_active (w))	2025	if (expect_false (!ev_is_active (w)))
888	return;	2026	return;
889		2027
		2028	{
		2029	int active = ((W)w)->active;
890	prepares [w->active - 1] = prepares [--preparecnt];	2030	prepares [active - 1] = prepares [--preparecnt];
		2031	((W)prepares [active - 1])->active = active;
		2032	}
		2033
891	ev_stop ((W)w);	2034	ev_stop (EV_A_ (W)w);
892	}	2035	}
893		2036
		2037	void
894	void evcheck_start (struct ev_check *w)	2038	ev_check_start (EV_P_ ev_check *w)
895	{	2039	{
896	if (ev_is_active (w))	2040	if (expect_false (ev_is_active (w)))
897	return;	2041	return;
898		2042
899	ev_start ((W)w, ++checkcnt);	2043	ev_start (EV_A_ (W)w, ++checkcnt);
900	array_needsize (checks, checkmax, checkcnt, );	2044	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
901	checks [checkcnt - 1] = w;	2045	checks [checkcnt - 1] = w;
902	}	2046	}
903		2047
		2048	void
904	void evcheck_stop (struct ev_check *w)	2049	ev_check_stop (EV_P_ ev_check *w)
905	{	2050	{
906	ev_clear ((W)w);	2051	ev_clear_pending (EV_A_ (W)w);
907	if (ev_is_active (w))	2052	if (expect_false (!ev_is_active (w)))
908	return;	2053	return;
909		2054
		2055	{
		2056	int active = ((W)w)->active;
910	checks [w->active - 1] = checks [--checkcnt];	2057	checks [active - 1] = checks [--checkcnt];
		2058	((W)checks [active - 1])->active = active;
		2059	}
		2060
911	ev_stop ((W)w);	2061	ev_stop (EV_A_ (W)w);
912	}	2062	}
913		2063
914	void evchild_start (struct ev_child *w)	2064	#if EV_EMBED_ENABLE
		2065	void noinline
		2066	ev_embed_sweep (EV_P_ ev_embed *w)
915	{	2067	{
		2068	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2069	}
		2070
		2071	static void
		2072	embed_cb (EV_P_ ev_io *io, int revents)
		2073	{
		2074	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2075
916	if (ev_is_active (w))	2076	if (ev_cb (w))
917	return;	2077	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2078	else
		2079	ev_embed_sweep (loop, w);
		2080	}
918		2081
		2082	void
		2083	ev_embed_start (EV_P_ ev_embed *w)
		2084	{
		2085	if (expect_false (ev_is_active (w)))
		2086	return;
		2087
		2088	{
		2089	struct ev_loop *loop = w->loop;
		2090	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2091	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2092	}
		2093
		2094	ev_set_priority (&w->io, ev_priority (w));
		2095	ev_io_start (EV_A_ &w->io);
		2096
919	ev_start ((W)w, 1);	2097	ev_start (EV_A_ (W)w, 1);
920	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
921	}	2098	}
922		2099
923	void evchild_stop (struct ev_child *w)	2100	void
		2101	ev_embed_stop (EV_P_ ev_embed *w)
924	{	2102	{
925	ev_clear ((W)w);	2103	ev_clear_pending (EV_A_ (W)w);
926	if (ev_is_active (w))	2104	if (expect_false (!ev_is_active (w)))
927	return;	2105	return;
928		2106
929	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2107	ev_io_stop (EV_A_ &w->io);
		2108
930	ev_stop ((W)w);	2109	ev_stop (EV_A_ (W)w);
931	}	2110	}
		2111	#endif
		2112
		2113	#if EV_FORK_ENABLE
		2114	void
		2115	ev_fork_start (EV_P_ ev_fork *w)
		2116	{
		2117	if (expect_false (ev_is_active (w)))
		2118	return;
		2119
		2120	ev_start (EV_A_ (W)w, ++forkcnt);
		2121	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2122	forks [forkcnt - 1] = w;
		2123	}
		2124
		2125	void
		2126	ev_fork_stop (EV_P_ ev_fork *w)
		2127	{
		2128	ev_clear_pending (EV_A_ (W)w);
		2129	if (expect_false (!ev_is_active (w)))
		2130	return;
		2131
		2132	{
		2133	int active = ((W)w)->active;
		2134	forks [active - 1] = forks [--forkcnt];
		2135	((W)forks [active - 1])->active = active;
		2136	}
		2137
		2138	ev_stop (EV_A_ (W)w);
		2139	}
		2140	#endif
932		2141
933	/*****************************************************************************/	2142	/*****************************************************************************/
934		2143
935	struct ev_once	2144	struct ev_once
936	{	2145	{
937	struct ev_io io;	2146	ev_io io;
938	struct ev_timer to;	2147	ev_timer to;
939	void (*cb)(int revents, void *arg);	2148	void (*cb)(int revents, void *arg);
940	void *arg;	2149	void *arg;
941	};	2150	};
942		2151
943	static void	2152	static void
944	once_cb (struct ev_once *once, int revents)	2153	once_cb (EV_P_ struct ev_once *once, int revents)
945	{	2154	{
946	void (*cb)(int revents, void *arg) = once->cb;	2155	void (*cb)(int revents, void *arg) = once->cb;
947	void *arg = once->arg;	2156	void *arg = once->arg;
948		2157
949	evio_stop (&once->io);	2158	ev_io_stop (EV_A_ &once->io);
950	evtimer_stop (&once->to);	2159	ev_timer_stop (EV_A_ &once->to);
951	free (once);	2160	ev_free (once);
952		2161
953	cb (revents, arg);	2162	cb (revents, arg);
954	}	2163	}
955		2164
956	static void	2165	static void
957	once_cb_io (struct ev_io *w, int revents)	2166	once_cb_io (EV_P_ ev_io *w, int revents)
958	{	2167	{
959	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2168	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
960	}	2169	}
961		2170
962	static void	2171	static void
963	once_cb_to (struct ev_timer *w, int revents)	2172	once_cb_to (EV_P_ ev_timer *w, int revents)
964	{	2173	{
965	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2174	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
966	}	2175	}
967		2176
968	void	2177	void
969	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2178	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
970	{	2179	{
971	struct ev_once *once = malloc (sizeof (struct ev_once));	2180	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
972		2181
973	if (!once)	2182	if (expect_false (!once))
974	cb (EV_ERROR, arg);	2183	{
975	else	2184	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		2185	return;
976	{	2186	}
		2187
977	once->cb = cb;	2188	once->cb = cb;
978	once->arg = arg;	2189	once->arg = arg;
979		2190
980	evw_init (&once->io, once_cb_io);	2191	ev_init (&once->io, once_cb_io);
981
982	if (fd >= 0)	2192	if (fd >= 0)
983	{	2193	{
984	evio_set (&once->io, fd, events);	2194	ev_io_set (&once->io, fd, events);
985	evio_start (&once->io);	2195	ev_io_start (EV_A_ &once->io);
986	}	2196	}
987		2197
988	evw_init (&once->to, once_cb_to);	2198	ev_init (&once->to, once_cb_to);
989
990	if (timeout >= 0.)	2199	if (timeout >= 0.)
991	{	2200	{
992	evtimer_set (&once->to, timeout, 0.);	2201	ev_timer_set (&once->to, timeout, 0.);
993	evtimer_start (&once->to);	2202	ev_timer_start (EV_A_ &once->to);
994	}
995	}
996	}
997
998	/*****************************************************************************/
999
1000	#if 0
1001
1002	struct ev_io wio;
1003
1004	static void
1005	sin_cb (struct ev_io *w, int revents)
1006	{
1007	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1008	}
1009
1010	static void
1011	ocb (struct ev_timer *w, int revents)
1012	{
1013	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1014	evtimer_stop (w);
1015	evtimer_start (w);
1016	}
1017
1018	static void
1019	scb (struct ev_signal *w, int revents)
1020	{
1021	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1022	evio_stop (&wio);
1023	evio_start (&wio);
1024	}
1025
1026	static void
1027	gcb (struct ev_signal *w, int revents)
1028	{
1029	fprintf (stderr, "generic %x\n", revents);
1030
1031	}
1032
1033	int main (void)
1034	{
1035	ev_init (0);
1036
1037	evio_init (&wio, sin_cb, 0, EV_READ);
1038	evio_start (&wio);
1039
1040	struct ev_timer t[10000];
1041
1042	#if 0
1043	int i;
1044	for (i = 0; i < 10000; ++i)
1045	{	2203	}
1046	struct ev_timer *w = t + i;
1047	evw_init (w, ocb, i);
1048	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1049	evtimer_start (w);
1050	if (drand48 () < 0.5)
1051	evtimer_stop (w);
1052	}
1053	#endif
1054
1055	struct ev_timer t1;
1056	evtimer_init (&t1, ocb, 5, 10);
1057	evtimer_start (&t1);
1058
1059	struct ev_signal sig;
1060	evsignal_init (&sig, scb, SIGQUIT);
1061	evsignal_start (&sig);
1062
1063	struct ev_check cw;
1064	evcheck_init (&cw, gcb);
1065	evcheck_start (&cw);
1066
1067	struct ev_idle iw;
1068	evidle_init (&iw, gcb);
1069	evidle_start (&iw);
1070
1071	ev_loop (0);
1072
1073	return 0;
1074	}	2204	}
1075		2205
		2206	#ifdef __cplusplus
		2207	}
1076	#endif	2208	#endif
1077		2209
1078
1079
1080

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