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Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.155 by root, Wed Nov 28 17:32:24 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		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
1	#include <math.h>	109	#include <math.h>
2	#include <stdlib.h>	110	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	111	#include <fcntl.h>
5	#include <signal.h>	112	#include <stddef.h>
6		113
7	#include <stdio.h>	114	#include <stdio.h>
8		115
9	#include <assert.h>	116	#include <assert.h>
10	#include <errno.h>	117	#include <errno.h>
11	#include <sys/time.h>	118	#include <sys/types.h>
12	#include <time.h>	119	#include <time.h>
13		120
		121	#include <signal.h>
		122
		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
		138	# endif
		139	#endif
		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
		151	#ifndef EV_USE_SELECT
		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
		160	# endif
		161	#endif
		162
		163	#ifndef EV_USE_EPOLL
		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
		184	# endif
		185	#endif
		186
		187	#ifndef EV_INOTIFY_HASHSIZE
		188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
		192	# endif
		193	#endif
		194
		195	/**/
		196
14	#ifdef CLOCK_MONOTONIC	197	#ifndef CLOCK_MONOTONIC
		198	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	199	# define EV_USE_MONOTONIC 0
16	#endif	200	#endif
17		201
		202	#ifndef CLOCK_REALTIME
		203	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	204	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	205	#endif
20	#define HAVE_SELECT 1	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	/**/
21		220
22	#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) */
23	#define MAX_BLOCKTIME 60.	222	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		223	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
24		224
		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
		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
		251	typedef ev_watcher *W;
		252	typedef ev_watcher_list *WL;
		253	typedef ev_watcher_time *WT;
		254
		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	};
25	#include "ev.h"	346	#include "ev_wrap.h"
26		347
27	struct ev_watcher {	348	static struct ev_loop default_loop_struct;
28	EV_WATCHER (ev_watcher);	349	struct ev_loop *ev_default_loop_ptr;
29	};
30		350
31	struct ev_watcher_list {	351	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		352
35	static ev_tstamp now, diff; /* monotonic clock */
36	ev_tstamp ev_now;	353	ev_tstamp ev_rt_now;
37	int ev_method;	354	#define VAR(name,decl) static decl;
		355	#include "ev_vars.h"
		356	#undef VAR
38		357
39	static int have_monotonic; /* runtime */	358	static int ev_default_loop_ptr;
40		359
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	360	#endif
42	static void (*method_modify)(int fd, int oev, int nev);	361
43	static void (*method_poll)(ev_tstamp timeout);	362	/*****************************************************************************/
44		363
45	ev_tstamp	364	ev_tstamp
46	ev_time (void)	365	ev_time (void)
47	{	366	{
48	#if HAVE_REALTIME	367	#if EV_USE_REALTIME
49	struct timespec ts;	368	struct timespec ts;
50	clock_gettime (CLOCK_REALTIME, &ts);	369	clock_gettime (CLOCK_REALTIME, &ts);
51	return ts.tv_sec + ts.tv_nsec * 1e-9;	370	return ts.tv_sec + ts.tv_nsec * 1e-9;
52	#else	371	#else
53	struct timeval tv;	372	struct timeval tv;
54	gettimeofday (&tv, 0);	373	gettimeofday (&tv, 0);
55	return tv.tv_sec + tv.tv_usec * 1e-6;	374	return tv.tv_sec + tv.tv_usec * 1e-6;
56	#endif	375	#endif
57	}	376	}
58		377
59	static ev_tstamp	378	ev_tstamp inline_size
60	get_clock (void)	379	get_clock (void)
61	{	380	{
62	#if HAVE_MONOTONIC	381	#if EV_USE_MONOTONIC
63	if (have_monotonic)	382	if (expect_true (have_monotonic))
64	{	383	{
65	struct timespec ts;	384	struct timespec ts;
66	clock_gettime (CLOCK_MONOTONIC, &ts);	385	clock_gettime (CLOCK_MONOTONIC, &ts);
67	return ts.tv_sec + ts.tv_nsec * 1e-9;	386	return ts.tv_sec + ts.tv_nsec * 1e-9;
68	}	387	}
69	#endif	388	#endif
70		389
71	return ev_time ();	390	return ev_time ();
72	}	391	}
73		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
74	#define array_needsize(base,cur,cnt,init) \	403	#define array_needsize(type,base,cur,cnt,init) \
75	if ((cnt) > cur) \	404	if (expect_false ((cnt) > cur)) \
76	{ \	405	{ \
77	int newcnt = cur ? cur << 1 : 16; \	406	int newcnt = cur; \
78	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	407	do \
		408	{ \
		409	newcnt = array_roundsize (type, newcnt << 1); \
		410	} \
		411	while ((cnt) > newcnt); \
		412	\
79	base = realloc (base, sizeof (*base) * (newcnt)); \	413	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
80	init (base + cur, newcnt - cur); \	414	init (base + cur, newcnt - cur); \
81	cur = newcnt; \	415	cur = newcnt; \
		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;
		428
		429	/*****************************************************************************/
		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;
82	}	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	/* this should be highly optimised to not do anything but set a flag */
		595	for (fd = 0; fd < anfdmax; ++fd)
		596	if (anfds [fd].events)
		597	{
		598	anfds [fd].events = 0;
		599	fd_change (EV_A_ fd);
		600	}
		601	}
		602
		603	/*****************************************************************************/
		604
		605	void inline_speed
		606	upheap (WT *heap, int k)
		607	{
		608	WT w = heap [k];
		609
		610	while (k && heap [k >> 1]->at > w->at)
		611	{
		612	heap [k] = heap [k >> 1];
		613	((W)heap [k])->active = k + 1;
		614	k >>= 1;
		615	}
		616
		617	heap [k] = w;
		618	((W)heap [k])->active = k + 1;
		619
		620	}
		621
		622	void inline_speed
		623	downheap (WT *heap, int N, int k)
		624	{
		625	WT w = heap [k];
		626
		627	while (k < (N >> 1))
		628	{
		629	int j = k << 1;
		630
		631	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		632	++j;
		633
		634	if (w->at <= heap [j]->at)
		635	break;
		636
		637	heap [k] = heap [j];
		638	((W)heap [k])->active = k + 1;
		639	k = j;
		640	}
		641
		642	heap [k] = w;
		643	((W)heap [k])->active = k + 1;
		644	}
		645
		646	void inline_size
		647	adjustheap (WT *heap, int N, int k)
		648	{
		649	upheap (heap, k);
		650	downheap (heap, N, k);
		651	}
		652
		653	/*****************************************************************************/
83		654
84	typedef struct	655	typedef struct
85	{	656	{
86	struct ev_io *head;	657	WL head;
87	unsigned char wev, rev; /* want, received event set */
88	} ANFD;
89
90	static ANFD *anfds;
91	static int anfdmax;
92
93	static int *fdchanges;
94	static int fdchangemax, fdchangecnt;
95
96	static void
97	anfds_init (ANFD *base, int count)
98	{
99	while (count--)
100	{
101	base->head = 0;
102	base->wev = base->rev = EV_NONE;
103	++base;
104	}
105	}
106
107	typedef struct
108	{
109	struct ev_watcher *w;
110	int events;
111	} ANPENDING;
112
113	static ANPENDING *pendings;
114	static int pendingmax, pendingcnt;
115
116	static void
117	event (struct ev_watcher *w, int events)
118	{
119	w->pending = ++pendingcnt;
120	array_needsize (pendings, pendingmax, pendingcnt, );
121	pendings [pendingcnt - 1].w = w;
122	pendings [pendingcnt - 1].events = events;
123	}
124
125	static void
126	fd_event (int fd, int events)
127	{
128	ANFD *anfd = anfds + fd;
129	struct ev_io *w;
130
131	for (w = anfd->head; w; w = w->next)
132	{
133	int ev = w->events & events;
134
135	if (ev)
136	event ((struct ev_watcher *)w, ev);
137	}
138	}
139
140	static struct ev_timer **atimers;
141	static int atimermax, atimercnt;
142
143	static struct ev_timer **rtimers;
144	static int rtimermax, rtimercnt;
145
146	static void
147	upheap (struct ev_timer **timers, int k)
148	{
149	struct ev_timer *w = timers [k];
150
151	while (k && timers [k >> 1]->at > w->at)
152	{
153	timers [k] = timers [k >> 1];
154	timers [k]->active = k + 1;
155	k >>= 1;
156	}
157
158	timers [k] = w;
159	timers [k]->active = k + 1;
160
161	}
162
163	static void
164	downheap (struct ev_timer **timers, int N, int k)
165	{
166	struct ev_timer *w = timers [k];
167
168	while (k < (N >> 1))
169	{
170	int j = k << 1;
171
172	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
173	++j;
174
175	if (w->at <= timers [j]->at)
176	break;
177
178	timers [k] = timers [j];
179	timers [k]->active = k + 1;
180	k = j;
181	}
182
183	timers [k] = w;
184	timers [k]->active = k + 1;
185	}
186
187	typedef struct
188	{
189	struct ev_signal *head;
190	sig_atomic_t gotsig;	658	sig_atomic_t volatile gotsig;
191	} ANSIG;	659	} ANSIG;
192		660
193	static ANSIG *signals;	661	static ANSIG *signals;
194	static int signalmax;	662	static int signalmax;
195		663
196	static int sigpipe [2];	664	static int sigpipe [2];
197	static sig_atomic_t gotsig;	665	static sig_atomic_t volatile gotsig;
198	static struct ev_io sigev;	666	static ev_io sigev;
199		667
200	static void	668	void inline_size
201	signals_init (ANSIG *base, int count)	669	signals_init (ANSIG *base, int count)
202	{	670	{
203	while (count--)	671	while (count--)
204	{	672	{
205	base->head = 0;	673	base->head = 0;
206	base->gotsig = 0;	674	base->gotsig = 0;
		675
207	++base;	676	++base;
208	}	677	}
209	}	678	}
210		679
211	static void	680	static void
212	sighandler (int signum)	681	sighandler (int signum)
213	{	682	{
		683	#if _WIN32
		684	signal (signum, sighandler);
		685	#endif
		686
214	signals [signum - 1].gotsig = 1;	687	signals [signum - 1].gotsig = 1;
215		688
216	if (!gotsig)	689	if (!gotsig)
217	{	690	{
		691	int old_errno = errno;
218	gotsig = 1;	692	gotsig = 1;
219	write (sigpipe [1], &gotsig, 1);	693	write (sigpipe [1], &signum, 1);
		694	errno = old_errno;
220	}	695	}
		696	}
		697
		698	void noinline
		699	ev_feed_signal_event (EV_P_ int signum)
		700	{
		701	WL w;
		702
		703	#if EV_MULTIPLICITY
		704	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		705	#endif
		706
		707	--signum;
		708
		709	if (signum < 0 || signum >= signalmax)
		710	return;
		711
		712	signals [signum].gotsig = 0;
		713
		714	for (w = signals [signum].head; w; w = w->next)
		715	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
221	}	716	}
222		717
223	static void	718	static void
224	sigcb (struct ev_io *iow, int revents)	719	sigcb (EV_P_ ev_io *iow, int revents)
225	{	720	{
226	struct ev_signal *w;
227	int sig;	721	int signum;
228		722
		723	read (sigpipe [0], &revents, 1);
229	gotsig = 0;	724	gotsig = 0;
230	read (sigpipe [0], &revents, 1);
231		725
232	for (sig = signalmax; sig--; )	726	for (signum = signalmax; signum--; )
233	if (signals [sig].gotsig)	727	if (signals [signum].gotsig)
		728	ev_feed_signal_event (EV_A_ signum + 1);
		729	}
		730
		731	void inline_size
		732	fd_intern (int fd)
		733	{
		734	#ifdef _WIN32
		735	int arg = 1;
		736	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		737	#else
		738	fcntl (fd, F_SETFD, FD_CLOEXEC);
		739	fcntl (fd, F_SETFL, O_NONBLOCK);
		740	#endif
		741	}
		742
		743	static void noinline
		744	siginit (EV_P)
		745	{
		746	fd_intern (sigpipe [0]);
		747	fd_intern (sigpipe [1]);
		748
		749	ev_io_set (&sigev, sigpipe [0], EV_READ);
		750	ev_io_start (EV_A_ &sigev);
		751	ev_unref (EV_A); /* child watcher should not keep loop alive */
		752	}
		753
		754	/*****************************************************************************/
		755
		756	static ev_child *childs [EV_PID_HASHSIZE];
		757
		758	#ifndef _WIN32
		759
		760	static ev_signal childev;
		761
		762	void inline_speed
		763	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		764	{
		765	ev_child *w;
		766
		767	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		768	if (w->pid == pid || !w->pid)
234	{	769	{
235	signals [sig].gotsig = 0;	770	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
236		771	w->rpid = pid;
237	for (w = signals [sig].head; w; w = w->next)	772	w->rstatus = status;
238	event ((struct ev_watcher *)w, EV_SIGNAL);	773	ev_feed_event (EV_A_ (W)w, EV_CHILD);
239	}	774	}
240	}	775	}
241		776
		777	#ifndef WCONTINUED
		778	# define WCONTINUED 0
		779	#endif
		780
242	static void	781	static void
243	siginit (void)	782	childcb (EV_P_ ev_signal *sw, int revents)
244	{	783	{
245	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	784	int pid, status;
246	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
247		785
248	/* rather than sort out wether we really need nb, set it */	786	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
249	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	787	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
250	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	788	if (!WCONTINUED
		789	|| errno != EINVAL
		790	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		791	return;
251		792
252	evio_set (&sigev, sigpipe [0], EV_READ);	793	/* make sure we are called again until all childs have been reaped */
253	evio_start (&sigev);	794	/* we need to do it this way so that the callback gets called before we continue */
254	}	795	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
255		796
		797	child_reap (EV_A_ sw, pid, pid, status);
		798	if (EV_PID_HASHSIZE > 1)
		799	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		800	}
		801
		802	#endif
		803
		804	/*****************************************************************************/
		805
		806	#if EV_USE_PORT
		807	# include "ev_port.c"
		808	#endif
		809	#if EV_USE_KQUEUE
		810	# include "ev_kqueue.c"
		811	#endif
256	#if HAVE_EPOLL	812	#if EV_USE_EPOLL
257	# include "ev_epoll.c"	813	# include "ev_epoll.c"
258	#endif	814	#endif
		815	#if EV_USE_POLL
		816	# include "ev_poll.c"
		817	#endif
259	#if HAVE_SELECT	818	#if EV_USE_SELECT
260	# include "ev_select.c"	819	# include "ev_select.c"
261	#endif	820	#endif
262		821
263	int ev_init (int flags)	822	int
		823	ev_version_major (void)
264	{	824	{
		825	return EV_VERSION_MAJOR;
		826	}
		827
		828	int
		829	ev_version_minor (void)
		830	{
		831	return EV_VERSION_MINOR;
		832	}
		833
		834	/* return true if we are running with elevated privileges and should ignore env variables */
		835	int inline_size
		836	enable_secure (void)
		837	{
		838	#ifdef _WIN32
		839	return 0;
		840	#else
		841	return getuid () != geteuid ()
		842	|| getgid () != getegid ();
		843	#endif
		844	}
		845
		846	unsigned int
		847	ev_supported_backends (void)
		848	{
		849	unsigned int flags = 0;
		850
		851	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		852	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		853	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		854	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		855	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		856
		857	return flags;
		858	}
		859
		860	unsigned int
		861	ev_recommended_backends (void)
		862	{
		863	unsigned int flags = ev_supported_backends ();
		864
		865	#ifndef __NetBSD__
		866	/* kqueue is borked on everything but netbsd apparently */
		867	/* it usually doesn't work correctly on anything but sockets and pipes */
		868	flags &= ~EVBACKEND_KQUEUE;
		869	#endif
		870	#ifdef __APPLE__
		871	// flags &= ~EVBACKEND_KQUEUE; for documentation
		872	flags &= ~EVBACKEND_POLL;
		873	#endif
		874
		875	return flags;
		876	}
		877
		878	unsigned int
		879	ev_embeddable_backends (void)
		880	{
		881	return EVBACKEND_EPOLL
		882	| EVBACKEND_KQUEUE
		883	| EVBACKEND_PORT;
		884	}
		885
		886	unsigned int
		887	ev_backend (EV_P)
		888	{
		889	return backend;
		890	}
		891
		892	static void noinline
		893	loop_init (EV_P_ unsigned int flags)
		894	{
		895	if (!backend)
		896	{
265	#if HAVE_MONOTONIC	897	#if EV_USE_MONOTONIC
266	{	898	{
267	struct timespec ts;	899	struct timespec ts;
268	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	900	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
269	have_monotonic = 1;	901	have_monotonic = 1;
270	}	902	}
271	#endif	903	#endif
272		904
273	ev_now = ev_time ();	905	ev_rt_now = ev_time ();
274	now = get_clock ();	906	mn_now = get_clock ();
275	diff = ev_now - now;	907	now_floor = mn_now;
		908	rtmn_diff = ev_rt_now - mn_now;
276		909
277	if (pipe (sigpipe))	910	if (!(flags & EVFLAG_NOENV)
278	return 0;	911	&& !enable_secure ()
		912	&& getenv ("LIBEV_FLAGS"))
		913	flags = atoi (getenv ("LIBEV_FLAGS"));
279		914
280	ev_method = EVMETHOD_NONE;	915	if (!(flags & 0x0000ffffUL))
		916	flags |= ev_recommended_backends ();
		917
		918	backend = 0;
		919	backend_fd = -1;
		920	#if EV_USE_INOTIFY
		921	fs_fd = -2;
		922	#endif
		923
		924	#if EV_USE_PORT
		925	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		926	#endif
		927	#if EV_USE_KQUEUE
		928	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		929	#endif
281	#if HAVE_EPOLL	930	#if EV_USE_EPOLL
282	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	931	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
283	#endif	932	#endif
		933	#if EV_USE_POLL
		934	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		935	#endif
284	#if HAVE_SELECT	936	#if EV_USE_SELECT
285	if (ev_method == EVMETHOD_NONE) select_init (flags);	937	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
286	#endif	938	#endif
287		939
288	if (ev_method)
289	{
290	evw_init (&sigev, sigcb, 0);	940	ev_init (&sigev, sigcb);
291	siginit ();	941	ev_set_priority (&sigev, EV_MAXPRI);
292	}	942	}
293
294	return ev_method;
295	}	943	}
296		944
297	void ev_prefork (void)	945	static void noinline
298	{	946	loop_destroy (EV_P)
299	}
300
301	void ev_postfork_parent (void)
302	{
303	}
304
305	void ev_postfork_child (void)
306	{
307	#if HAVE_EPOLL
308	if (ev_method == EVMETHOD_EPOLL)
309	epoll_postfork_child ();
310	#endif
311
312	evio_stop (&sigev);
313	close (sigpipe [0]);
314	close (sigpipe [1]);
315	pipe (sigpipe);
316	siginit ();
317	}
318
319	static void
320	fd_reify (void)
321	{	947	{
322	int i;	948	int i;
323		949
324	for (i = 0; i < fdchangecnt; ++i)	950	#if EV_USE_INOTIFY
		951	if (fs_fd >= 0)
		952	close (fs_fd);
		953	#endif
		954
		955	if (backend_fd >= 0)
		956	close (backend_fd);
		957
		958	#if EV_USE_PORT
		959	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		960	#endif
		961	#if EV_USE_KQUEUE
		962	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		963	#endif
		964	#if EV_USE_EPOLL
		965	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		966	#endif
		967	#if EV_USE_POLL
		968	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		969	#endif
		970	#if EV_USE_SELECT
		971	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		972	#endif
		973
		974	for (i = NUMPRI; i--; )
		975	array_free (pending, [i]);
		976
		977	/* have to use the microsoft-never-gets-it-right macro */
		978	array_free (fdchange, EMPTY0);
		979	array_free (timer, EMPTY0);
		980	#if EV_PERIODIC_ENABLE
		981	array_free (periodic, EMPTY0);
		982	#endif
		983	array_free (idle, EMPTY0);
		984	array_free (prepare, EMPTY0);
		985	array_free (check, EMPTY0);
		986
		987	backend = 0;
		988	}
		989
		990	void inline_size infy_fork (EV_P);
		991
		992	void inline_size
		993	loop_fork (EV_P)
		994	{
		995	#if EV_USE_PORT
		996	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		997	#endif
		998	#if EV_USE_KQUEUE
		999	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1000	#endif
		1001	#if EV_USE_EPOLL
		1002	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1003	#endif
		1004	#if EV_USE_INOTIFY
		1005	infy_fork (EV_A);
		1006	#endif
		1007
		1008	if (ev_is_active (&sigev))
		1009	{
		1010	/* default loop */
		1011
		1012	ev_ref (EV_A);
		1013	ev_io_stop (EV_A_ &sigev);
		1014	close (sigpipe [0]);
		1015	close (sigpipe [1]);
		1016
		1017	while (pipe (sigpipe))
		1018	syserr ("(libev) error creating pipe");
		1019
		1020	siginit (EV_A);
325	{	1021	}
326	int fd = fdchanges [i];
327	ANFD *anfd = anfds + fd;
328	struct ev_io *w;
329		1022
330	int wev = 0;	1023	postfork = 0;
		1024	}
331		1025
332	for (w = anfd->head; w; w = w->next)	1026	#if EV_MULTIPLICITY
333	wev |= w->events;	1027	struct ev_loop *
		1028	ev_loop_new (unsigned int flags)
		1029	{
		1030	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
334		1031
335	if (anfd->wev != wev)	1032	memset (loop, 0, sizeof (struct ev_loop));
		1033
		1034	loop_init (EV_A_ flags);
		1035
		1036	if (ev_backend (EV_A))
		1037	return loop;
		1038
		1039	return 0;
		1040	}
		1041
		1042	void
		1043	ev_loop_destroy (EV_P)
		1044	{
		1045	loop_destroy (EV_A);
		1046	ev_free (loop);
		1047	}
		1048
		1049	void
		1050	ev_loop_fork (EV_P)
		1051	{
		1052	postfork = 1;
		1053	}
		1054
		1055	#endif
		1056
		1057	#if EV_MULTIPLICITY
		1058	struct ev_loop *
		1059	ev_default_loop_init (unsigned int flags)
		1060	#else
		1061	int
		1062	ev_default_loop (unsigned int flags)
		1063	#endif
		1064	{
		1065	if (sigpipe [0] == sigpipe [1])
		1066	if (pipe (sigpipe))
		1067	return 0;
		1068
		1069	if (!ev_default_loop_ptr)
		1070	{
		1071	#if EV_MULTIPLICITY
		1072	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1073	#else
		1074	ev_default_loop_ptr = 1;
		1075	#endif
		1076
		1077	loop_init (EV_A_ flags);
		1078
		1079	if (ev_backend (EV_A))
336	{	1080	{
337	method_modify (fd, anfd->wev, wev);	1081	siginit (EV_A);
338	anfd->wev = wev;	1082
		1083	#ifndef _WIN32
		1084	ev_signal_init (&childev, childcb, SIGCHLD);
		1085	ev_set_priority (&childev, EV_MAXPRI);
		1086	ev_signal_start (EV_A_ &childev);
		1087	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1088	#endif
339	}	1089	}
		1090	else
		1091	ev_default_loop_ptr = 0;
340	}	1092	}
341		1093
342	fdchangecnt = 0;	1094	return ev_default_loop_ptr;
343	}	1095	}
344		1096
345	static void	1097	void
346	call_pending ()	1098	ev_default_destroy (void)
347	{	1099	{
		1100	#if EV_MULTIPLICITY
		1101	struct ev_loop *loop = ev_default_loop_ptr;
		1102	#endif
		1103
		1104	#ifndef _WIN32
		1105	ev_ref (EV_A); /* child watcher */
		1106	ev_signal_stop (EV_A_ &childev);
		1107	#endif
		1108
		1109	ev_ref (EV_A); /* signal watcher */
		1110	ev_io_stop (EV_A_ &sigev);
		1111
		1112	close (sigpipe [0]); sigpipe [0] = 0;
		1113	close (sigpipe [1]); sigpipe [1] = 0;
		1114
		1115	loop_destroy (EV_A);
		1116	}
		1117
		1118	void
		1119	ev_default_fork (void)
		1120	{
		1121	#if EV_MULTIPLICITY
		1122	struct ev_loop *loop = ev_default_loop_ptr;
		1123	#endif
		1124
		1125	if (backend)
		1126	postfork = 1;
		1127	}
		1128
		1129	/*****************************************************************************/
		1130
		1131	int inline_size
		1132	any_pending (EV_P)
		1133	{
348	int i;	1134	int pri;
349		1135
350	for (i = 0; i < pendingcnt; ++i)	1136	for (pri = NUMPRI; pri--; )
		1137	if (pendingcnt [pri])
		1138	return 1;
		1139
		1140	return 0;
		1141	}
		1142
		1143	void inline_speed
		1144	call_pending (EV_P)
		1145	{
		1146	int pri;
		1147
		1148	for (pri = NUMPRI; pri--; )
		1149	while (pendingcnt [pri])
351	{	1150	{
352	ANPENDING *p = pendings + i;	1151	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
353		1152
354	if (p->w)	1153	if (expect_true (p->w))
355	{	1154	{
		1155	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1156
356	p->w->pending = 0;	1157	p->w->pending = 0;
357	p->w->cb (p->w, p->events);	1158	EV_CB_INVOKE (p->w, p->events);
358	}	1159	}
359	}	1160	}
360
361	pendingcnt = 0;
362	}	1161	}
363		1162
364	static void	1163	void inline_size
365	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1164	timers_reify (EV_P)
366	{	1165	{
367	while (timercnt && timers [0]->at <= now)	1166	while (timercnt && ((WT)timers [0])->at <= mn_now)
368	{	1167	{
369	struct ev_timer *w = timers [0];	1168	ev_timer *w = timers [0];
		1169
		1170	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
370		1171
371	/* first reschedule or stop timer */	1172	/* first reschedule or stop timer */
372	if (w->repeat)	1173	if (w->repeat)
373	{	1174	{
374	if (w->is_abs)	1175	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
375	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1176
376	else
377	w->at = now + w->repeat;	1177	((WT)w)->at += w->repeat;
		1178	if (((WT)w)->at < mn_now)
		1179	((WT)w)->at = mn_now;
378		1180
379	assert (w->at > now);
380
381	downheap (timers, timercnt, 0);	1181	downheap ((WT *)timers, timercnt, 0);
382	}	1182	}
383	else	1183	else
		1184	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1185
		1186	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1187	}
		1188	}
		1189
		1190	#if EV_PERIODIC_ENABLE
		1191	void inline_size
		1192	periodics_reify (EV_P)
		1193	{
		1194	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1195	{
		1196	ev_periodic *w = periodics [0];
		1197
		1198	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1199
		1200	/* first reschedule or stop timer */
		1201	if (w->reschedule_cb)
384	{	1202	{
385	evtimer_stop (w); /* nonrepeating: stop timer */	1203	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
386	--timercnt; /* maybe pass by reference instead? */	1204	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1205	downheap ((WT *)periodics, periodiccnt, 0);
387	}	1206	}
		1207	else if (w->interval)
		1208	{
		1209	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1210	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1211	downheap ((WT *)periodics, periodiccnt, 0);
		1212	}
		1213	else
		1214	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
388		1215
389	event ((struct ev_watcher *)w, EV_TIMEOUT);	1216	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
390	}	1217	}
391	}	1218	}
392		1219
393	static void	1220	static void noinline
394	time_update ()	1221	periodics_reschedule (EV_P)
395	{	1222	{
396	int i;	1223	int i;
		1224
		1225	/* adjust periodics after time jump */
		1226	for (i = 0; i < periodiccnt; ++i)
		1227	{
		1228	ev_periodic *w = periodics [i];
		1229
		1230	if (w->reschedule_cb)
		1231	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1232	else if (w->interval)
		1233	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1234	}
		1235
		1236	/* now rebuild the heap */
		1237	for (i = periodiccnt >> 1; i--; )
		1238	downheap ((WT *)periodics, periodiccnt, i);
		1239	}
		1240	#endif
		1241
		1242	int inline_size
		1243	time_update_monotonic (EV_P)
		1244	{
		1245	mn_now = get_clock ();
		1246
		1247	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1248	{
		1249	ev_rt_now = rtmn_diff + mn_now;
		1250	return 0;
		1251	}
		1252	else
		1253	{
		1254	now_floor = mn_now;
397	ev_now = ev_time ();	1255	ev_rt_now = ev_time ();
398		1256	return 1;
399	if (have_monotonic)
400	{	1257	}
401	ev_tstamp odiff = diff;	1258	}
402		1259
403	/* detecting time jumps is much more difficult */	1260	void inline_size
404	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1261	time_update (EV_P)
		1262	{
		1263	int i;
		1264
		1265	#if EV_USE_MONOTONIC
		1266	if (expect_true (have_monotonic))
		1267	{
		1268	if (time_update_monotonic (EV_A))
405	{	1269	{
406	now = get_clock ();	1270	ev_tstamp odiff = rtmn_diff;
		1271
		1272	/* loop a few times, before making important decisions.
		1273	* on the choice of "4": one iteration isn't enough,
		1274	* in case we get preempted during the calls to
		1275	* ev_time and get_clock. a second call is almost guarenteed
		1276	* to succeed in that case, though. and looping a few more times
		1277	* doesn't hurt either as we only do this on time-jumps or
		1278	* in the unlikely event of getting preempted here.
		1279	*/
		1280	for (i = 4; --i; )
		1281	{
407	diff = ev_now - now;	1282	rtmn_diff = ev_rt_now - mn_now;
408		1283
409	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1284	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
410	return; /* all is well */	1285	return; /* all is well */
411		1286
412	ev_now = ev_time ();	1287	ev_rt_now = ev_time ();
		1288	mn_now = get_clock ();
		1289	now_floor = mn_now;
		1290	}
		1291
		1292	# if EV_PERIODIC_ENABLE
		1293	periodics_reschedule (EV_A);
		1294	# endif
		1295	/* no timer adjustment, as the monotonic clock doesn't jump */
		1296	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
413	}	1297	}
		1298	}
		1299	else
		1300	#endif
		1301	{
		1302	ev_rt_now = ev_time ();
414		1303
415	/* time jump detected, reschedule atimers */	1304	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
416	for (i = 0; i < atimercnt; ++i)
417	{	1305	{
418	struct ev_timer *w = atimers [i];	1306	#if EV_PERIODIC_ENABLE
419	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1307	periodics_reschedule (EV_A);
		1308	#endif
		1309
		1310	/* adjust timers. this is easy, as the offset is the same for all */
		1311	for (i = 0; i < timercnt; ++i)
		1312	((WT)timers [i])->at += ev_rt_now - mn_now;
420	}	1313	}
421	}
422	else
423	{
424	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
425	/* time jump detected, adjust rtimers */
426	for (i = 0; i < rtimercnt; ++i)
427	rtimers [i]->at += ev_now - now;
428		1314
429	now = ev_now;	1315	mn_now = ev_rt_now;
430	}
431	}
432
433	int ev_loop_done;
434
435	void ev_loop (int flags)
436	{
437	double block;
438	ev_loop_done = flags & EVLOOP_ONESHOT;
439
440	do
441	{	1316	}
		1317	}
		1318
		1319	void
		1320	ev_ref (EV_P)
		1321	{
		1322	++activecnt;
		1323	}
		1324
		1325	void
		1326	ev_unref (EV_P)
		1327	{
		1328	--activecnt;
		1329	}
		1330
		1331	static int loop_done;
		1332
		1333	void
		1334	ev_loop (EV_P_ int flags)
		1335	{
		1336	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1337	? EVUNLOOP_ONE
		1338	: EVUNLOOP_CANCEL;
		1339
		1340	while (activecnt)
		1341	{
		1342	/* we might have forked, so reify kernel state if necessary */
		1343	#if EV_FORK_ENABLE
		1344	if (expect_false (postfork))
		1345	if (forkcnt)
		1346	{
		1347	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1348	call_pending (EV_A);
		1349	}
		1350	#endif
		1351
		1352	/* queue check watchers (and execute them) */
		1353	if (expect_false (preparecnt))
		1354	{
		1355	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1356	call_pending (EV_A);
		1357	}
		1358
		1359	/* we might have forked, so reify kernel state if necessary */
		1360	if (expect_false (postfork))
		1361	loop_fork (EV_A);
		1362
442	/* update fd-related kernel structures */	1363	/* update fd-related kernel structures */
443	fd_reify ();	1364	fd_reify (EV_A);
444		1365
445	/* calculate blocking time */	1366	/* calculate blocking time */
		1367	{
		1368	double block;
		1369
446	if (flags & EVLOOP_NONBLOCK)	1370	if (flags & EVLOOP_NONBLOCK || idlecnt)
447	block = 0.;	1371	block = 0.; /* do not block at all */
448	else	1372	else
449	{	1373	{
		1374	/* update time to cancel out callback processing overhead */
		1375	#if EV_USE_MONOTONIC
		1376	if (expect_true (have_monotonic))
		1377	time_update_monotonic (EV_A);
		1378	else
		1379	#endif
		1380	{
		1381	ev_rt_now = ev_time ();
		1382	mn_now = ev_rt_now;
		1383	}
		1384
450	block = MAX_BLOCKTIME;	1385	block = MAX_BLOCKTIME;
451		1386
452	if (rtimercnt)	1387	if (timercnt)
453	{	1388	{
454	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1389	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
455	if (block > to) block = to;	1390	if (block > to) block = to;
456	}	1391	}
457		1392
		1393	#if EV_PERIODIC_ENABLE
458	if (atimercnt)	1394	if (periodiccnt)
459	{	1395	{
460	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1396	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
461	if (block > to) block = to;	1397	if (block > to) block = to;
462	}	1398	}
		1399	#endif
463		1400
464	if (block < 0.) block = 0.;	1401	if (expect_false (block < 0.)) block = 0.;
465	}	1402	}
466		1403
467	method_poll (block);	1404	backend_poll (EV_A_ block);
		1405	}
468		1406
469	/* update ev_now, do magic */	1407	/* update ev_rt_now, do magic */
470	time_update ();	1408	time_update (EV_A);
471		1409
472	/* put pending timers into pendign queue and reschedule them */	1410	/* queue pending timers and reschedule them */
473	/* absolute timers first */	1411	timers_reify (EV_A); /* relative timers called last */
474	timers_reify (atimers, atimercnt, ev_now);	1412	#if EV_PERIODIC_ENABLE
475	/* relative timers second */	1413	periodics_reify (EV_A); /* absolute timers called first */
476	timers_reify (rtimers, rtimercnt, now);	1414	#endif
477		1415
		1416	/* queue idle watchers unless other events are pending */
		1417	if (idlecnt && !any_pending (EV_A))
		1418	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1419
		1420	/* queue check watchers, to be executed first */
		1421	if (expect_false (checkcnt))
		1422	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1423
478	call_pending ();	1424	call_pending (EV_A);
479	}
480	while (!ev_loop_done);
481	}
482		1425
483	static void	1426	if (expect_false (loop_done))
484	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1427	break;
		1428	}
		1429
		1430	if (loop_done == EVUNLOOP_ONE)
		1431	loop_done = EVUNLOOP_CANCEL;
		1432	}
		1433
		1434	void
		1435	ev_unloop (EV_P_ int how)
		1436	{
		1437	loop_done = how;
		1438	}
		1439
		1440	/*****************************************************************************/
		1441
		1442	void inline_size
		1443	wlist_add (WL *head, WL elem)
485	{	1444	{
486	elem->next = *head;	1445	elem->next = *head;
487	*head = elem;	1446	*head = elem;
488	}	1447	}
489		1448
490	static void	1449	void inline_size
491	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1450	wlist_del (WL *head, WL elem)
492	{	1451	{
493	while (*head)	1452	while (*head)
494	{	1453	{
495	if (*head == elem)	1454	if (*head == elem)
496	{	1455	{
…		…
500		1459
501	head = &(*head)->next;	1460	head = &(*head)->next;
502	}	1461	}
503	}	1462	}
504		1463
505	static void	1464	void inline_speed
506	ev_start (struct ev_watcher *w, int active)	1465	ev_clear_pending (EV_P_ W w)
507	{	1466	{
		1467	if (w->pending)
		1468	{
		1469	pendings [ABSPRI (w)][w->pending - 1].w = 0;
508	w->pending = 0;	1470	w->pending = 0;
		1471	}
		1472	}
		1473
		1474	void inline_speed
		1475	ev_start (EV_P_ W w, int active)
		1476	{
		1477	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1478	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1479
509	w->active = active;	1480	w->active = active;
		1481	ev_ref (EV_A);
510	}	1482	}
511		1483
512	static void	1484	void inline_size
513	ev_stop (struct ev_watcher *w)	1485	ev_stop (EV_P_ W w)
514	{	1486	{
515	if (w->pending)	1487	ev_unref (EV_A);
516	pendings [w->pending - 1].w = 0;
517
518	w->active = 0;	1488	w->active = 0;
519	/* nop */
520	}	1489	}
521		1490
		1491	/*****************************************************************************/
		1492
522	void	1493	void
523	evio_start (struct ev_io *w)	1494	ev_io_start (EV_P_ ev_io *w)
		1495	{
		1496	int fd = w->fd;
		1497
		1498	if (expect_false (ev_is_active (w)))
		1499	return;
		1500
		1501	assert (("ev_io_start called with negative fd", fd >= 0));
		1502
		1503	ev_start (EV_A_ (W)w, 1);
		1504	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1505	wlist_add ((WL *)&anfds[fd].head, (WL)w);
		1506
		1507	fd_change (EV_A_ fd);
		1508	}
		1509
		1510	void
		1511	ev_io_stop (EV_P_ ev_io *w)
		1512	{
		1513	ev_clear_pending (EV_A_ (W)w);
		1514	if (expect_false (!ev_is_active (w)))
		1515	return;
		1516
		1517	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1518
		1519	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
		1520	ev_stop (EV_A_ (W)w);
		1521
		1522	fd_change (EV_A_ w->fd);
		1523	}
		1524
		1525	void
		1526	ev_timer_start (EV_P_ ev_timer *w)
		1527	{
		1528	if (expect_false (ev_is_active (w)))
		1529	return;
		1530
		1531	((WT)w)->at += mn_now;
		1532
		1533	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1534
		1535	ev_start (EV_A_ (W)w, ++timercnt);
		1536	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
		1537	timers [timercnt - 1] = w;
		1538	upheap ((WT *)timers, timercnt - 1);
		1539
		1540	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1541	}
		1542
		1543	void
		1544	ev_timer_stop (EV_P_ ev_timer *w)
		1545	{
		1546	ev_clear_pending (EV_A_ (W)w);
		1547	if (expect_false (!ev_is_active (w)))
		1548	return;
		1549
		1550	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1551
		1552	{
		1553	int active = ((W)w)->active;
		1554
		1555	if (expect_true (--active < --timercnt))
		1556	{
		1557	timers [active] = timers [timercnt];
		1558	adjustheap ((WT *)timers, timercnt, active);
		1559	}
		1560	}
		1561
		1562	((WT)w)->at -= mn_now;
		1563
		1564	ev_stop (EV_A_ (W)w);
		1565	}
		1566
		1567	void
		1568	ev_timer_again (EV_P_ ev_timer *w)
524	{	1569	{
525	if (ev_is_active (w))	1570	if (ev_is_active (w))
526	return;
527
528	int fd = w->fd;
529
530	ev_start ((struct ev_watcher *)w, 1);
531	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
532	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
533
534	++fdchangecnt;
535	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536	fdchanges [fdchangecnt - 1] = fd;
537	}
538
539	void
540	evio_stop (struct ev_io *w)
541	{
542	if (!ev_is_active (w))
543	return;
544
545	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
546	ev_stop ((struct ev_watcher *)w);
547
548	++fdchangecnt;
549	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550	fdchanges [fdchangecnt - 1] = w->fd;
551	}
552
553	void
554	evtimer_start (struct ev_timer *w)
555	{
556	if (ev_is_active (w))
557	return;
558
559	if (w->is_abs)
560	{	1571	{
561	/* this formula differs from the one in timer_reify becuse we do not round up */
562	if (w->repeat)	1572	if (w->repeat)
563	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
564
565	ev_start ((struct ev_watcher *)w, ++atimercnt);
566	array_needsize (atimers, atimermax, atimercnt, );
567	atimers [atimercnt - 1] = w;
568	upheap (atimers, atimercnt - 1);
569	}
570	else
571	{
572	w->at += now;
573
574	ev_start ((struct ev_watcher *)w, ++rtimercnt);
575	array_needsize (rtimers, rtimermax, rtimercnt, );
576	rtimers [rtimercnt - 1] = w;
577	upheap (rtimers, rtimercnt - 1);
578	}
579
580	}
581
582	void
583	evtimer_stop (struct ev_timer *w)
584	{
585	if (!ev_is_active (w))
586	return;
587
588	if (w->is_abs)
589	{
590	if (w->active < atimercnt--)
591	{	1573	{
592	atimers [w->active - 1] = atimers [atimercnt];	1574	((WT)w)->at = mn_now + w->repeat;
593	downheap (atimers, atimercnt, w->active - 1);	1575	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
594	}	1576	}
595	}
596	else	1577	else
		1578	ev_timer_stop (EV_A_ w);
597	{	1579	}
598	if (w->active < rtimercnt--)	1580	else if (w->repeat)
		1581	{
		1582	w->at = w->repeat;
		1583	ev_timer_start (EV_A_ w);
		1584	}
		1585	}
		1586
		1587	#if EV_PERIODIC_ENABLE
		1588	void
		1589	ev_periodic_start (EV_P_ ev_periodic *w)
		1590	{
		1591	if (expect_false (ev_is_active (w)))
		1592	return;
		1593
		1594	if (w->reschedule_cb)
		1595	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1596	else if (w->interval)
		1597	{
		1598	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1599	/* this formula differs from the one in periodic_reify because we do not always round up */
		1600	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1601	}
		1602
		1603	ev_start (EV_A_ (W)w, ++periodiccnt);
		1604	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
		1605	periodics [periodiccnt - 1] = w;
		1606	upheap ((WT *)periodics, periodiccnt - 1);
		1607
		1608	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1609	}
		1610
		1611	void
		1612	ev_periodic_stop (EV_P_ ev_periodic *w)
		1613	{
		1614	ev_clear_pending (EV_A_ (W)w);
		1615	if (expect_false (!ev_is_active (w)))
		1616	return;
		1617
		1618	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1619
		1620	{
		1621	int active = ((W)w)->active;
		1622
		1623	if (expect_true (--active < --periodiccnt))
599	{	1624	{
600	rtimers [w->active - 1] = rtimers [rtimercnt];	1625	periodics [active] = periodics [periodiccnt];
601	downheap (rtimers, rtimercnt, w->active - 1);	1626	adjustheap ((WT *)periodics, periodiccnt, active);
602	}	1627	}
603	}	1628	}
604		1629
605	ev_stop ((struct ev_watcher *)w);	1630	ev_stop (EV_A_ (W)w);
606	}	1631	}
607		1632
608	void	1633	void
		1634	ev_periodic_again (EV_P_ ev_periodic *w)
		1635	{
		1636	/* TODO: use adjustheap and recalculation */
		1637	ev_periodic_stop (EV_A_ w);
		1638	ev_periodic_start (EV_A_ w);
		1639	}
		1640	#endif
		1641
		1642	#ifndef SA_RESTART
		1643	# define SA_RESTART 0
		1644	#endif
		1645
		1646	void
609	evsignal_start (struct ev_signal *w)	1647	ev_signal_start (EV_P_ ev_signal *w)
610	{	1648	{
		1649	#if EV_MULTIPLICITY
		1650	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1651	#endif
611	if (ev_is_active (w))	1652	if (expect_false (ev_is_active (w)))
612	return;	1653	return;
613		1654
614	ev_start ((struct ev_watcher *)w, 1);	1655	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1656
		1657	ev_start (EV_A_ (W)w, 1);
615	array_needsize (signals, signalmax, w->signum, signals_init);	1658	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
616	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1659	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
617		1660
618	if (!w->next)	1661	if (!((WL)w)->next)
619	{	1662	{
		1663	#if _WIN32
		1664	signal (w->signum, sighandler);
		1665	#else
620	struct sigaction sa;	1666	struct sigaction sa;
621	sa.sa_handler = sighandler;	1667	sa.sa_handler = sighandler;
622	sigfillset (&sa.sa_mask);	1668	sigfillset (&sa.sa_mask);
623	sa.sa_flags = 0;	1669	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
624	sigaction (w->signum, &sa, 0);	1670	sigaction (w->signum, &sa, 0);
		1671	#endif
625	}	1672	}
626	}	1673	}
627		1674
628	void	1675	void
629	evsignal_stop (struct ev_signal *w)	1676	ev_signal_stop (EV_P_ ev_signal *w)
630	{	1677	{
		1678	ev_clear_pending (EV_A_ (W)w);
631	if (!ev_is_active (w))	1679	if (expect_false (!ev_is_active (w)))
632	return;	1680	return;
633		1681
634	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1682	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
635	ev_stop ((struct ev_watcher *)w);	1683	ev_stop (EV_A_ (W)w);
636		1684
637	if (!signals [w->signum - 1].head)	1685	if (!signals [w->signum - 1].head)
638	signal (w->signum, SIG_DFL);	1686	signal (w->signum, SIG_DFL);
639	}	1687	}
640		1688
		1689	void
		1690	ev_child_start (EV_P_ ev_child *w)
		1691	{
		1692	#if EV_MULTIPLICITY
		1693	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1694	#endif
		1695	if (expect_false (ev_is_active (w)))
		1696	return;
		1697
		1698	ev_start (EV_A_ (W)w, 1);
		1699	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1700	}
		1701
		1702	void
		1703	ev_child_stop (EV_P_ ev_child *w)
		1704	{
		1705	ev_clear_pending (EV_A_ (W)w);
		1706	if (expect_false (!ev_is_active (w)))
		1707	return;
		1708
		1709	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1710	ev_stop (EV_A_ (W)w);
		1711	}
		1712
		1713	#if EV_STAT_ENABLE
		1714
		1715	# ifdef _WIN32
		1716	# undef lstat
		1717	# define lstat(a,b) _stati64 (a,b)
		1718	# endif
		1719
		1720	#define DEF_STAT_INTERVAL 5.0074891
		1721	#define MIN_STAT_INTERVAL 0.1074891
		1722
		1723	void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1724
		1725	#if EV_USE_INOTIFY
		1726	# define EV_INOTIFY_BUFSIZE 8192
		1727
		1728	static void noinline
		1729	infy_add (EV_P_ ev_stat *w)
		1730	{
		1731	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);
		1732
		1733	if (w->wd < 0)
		1734	{
		1735	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1736
		1737	/* monitor some parent directory for speedup hints */
		1738	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1739	{
		1740	char path [4096];
		1741	strcpy (path, w->path);
		1742
		1743	do
		1744	{
		1745	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1746	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1747
		1748	char *pend = strrchr (path, '/');
		1749
		1750	if (!pend)
		1751	break; /* whoops, no '/', complain to your admin */
		1752
		1753	*pend = 0;
		1754	w->wd = inotify_add_watch (fs_fd, path, mask);
		1755	}
		1756	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1757	}
		1758	}
		1759	else
		1760	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1761
		1762	if (w->wd >= 0)
		1763	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1764	}
		1765
		1766	static void noinline
		1767	infy_del (EV_P_ ev_stat *w)
		1768	{
		1769	int slot;
		1770	int wd = w->wd;
		1771
		1772	if (wd < 0)
		1773	return;
		1774
		1775	w->wd = -2;
		1776	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1777	wlist_del (&fs_hash [slot].head, (WL)w);
		1778
		1779	/* remove this watcher, if others are watching it, they will rearm */
		1780	inotify_rm_watch (fs_fd, wd);
		1781	}
		1782
		1783	static void noinline
		1784	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1785	{
		1786	if (slot < 0)
		1787	/* overflow, need to check for all hahs slots */
		1788	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1789	infy_wd (EV_A_ slot, wd, ev);
		1790	else
		1791	{
		1792	WL w_;
		1793
		1794	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1795	{
		1796	ev_stat *w = (ev_stat *)w_;
		1797	w_ = w_->next; /* lets us remove this watcher and all before it */
		1798
		1799	if (w->wd == wd || wd == -1)
		1800	{
		1801	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1802	{
		1803	w->wd = -1;
		1804	infy_add (EV_A_ w); /* re-add, no matter what */
		1805	}
		1806
		1807	stat_timer_cb (EV_A_ &w->timer, 0);
		1808	}
		1809	}
		1810	}
		1811	}
		1812
		1813	static void
		1814	infy_cb (EV_P_ ev_io *w, int revents)
		1815	{
		1816	char buf [EV_INOTIFY_BUFSIZE];
		1817	struct inotify_event *ev = (struct inotify_event *)buf;
		1818	int ofs;
		1819	int len = read (fs_fd, buf, sizeof (buf));
		1820
		1821	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1822	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1823	}
		1824
		1825	void inline_size
		1826	infy_init (EV_P)
		1827	{
		1828	if (fs_fd != -2)
		1829	return;
		1830
		1831	fs_fd = inotify_init ();
		1832
		1833	if (fs_fd >= 0)
		1834	{
		1835	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1836	ev_set_priority (&fs_w, EV_MAXPRI);
		1837	ev_io_start (EV_A_ &fs_w);
		1838	}
		1839	}
		1840
		1841	void inline_size
		1842	infy_fork (EV_P)
		1843	{
		1844	int slot;
		1845
		1846	if (fs_fd < 0)
		1847	return;
		1848
		1849	close (fs_fd);
		1850	fs_fd = inotify_init ();
		1851
		1852	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1853	{
		1854	WL w_ = fs_hash [slot].head;
		1855	fs_hash [slot].head = 0;
		1856
		1857	while (w_)
		1858	{
		1859	ev_stat *w = (ev_stat *)w_;
		1860	w_ = w_->next; /* lets us add this watcher */
		1861
		1862	w->wd = -1;
		1863
		1864	if (fs_fd >= 0)
		1865	infy_add (EV_A_ w); /* re-add, no matter what */
		1866	else
		1867	ev_timer_start (EV_A_ &w->timer);
		1868	}
		1869
		1870	}
		1871	}
		1872
		1873	#endif
		1874
		1875	void
		1876	ev_stat_stat (EV_P_ ev_stat *w)
		1877	{
		1878	if (lstat (w->path, &w->attr) < 0)
		1879	w->attr.st_nlink = 0;
		1880	else if (!w->attr.st_nlink)
		1881	w->attr.st_nlink = 1;
		1882	}
		1883
		1884	void noinline
		1885	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1886	{
		1887	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1888
		1889	/* we copy this here each the time so that */
		1890	/* prev has the old value when the callback gets invoked */
		1891	w->prev = w->attr;
		1892	ev_stat_stat (EV_A_ w);
		1893
		1894	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1895	{
		1896	#if EV_USE_INOTIFY
		1897	infy_del (EV_A_ w);
		1898	infy_add (EV_A_ w);
		1899	ev_stat_stat (EV_A_ w); /* avoid race... */
		1900	#endif
		1901
		1902	ev_feed_event (EV_A_ w, EV_STAT);
		1903	}
		1904	}
		1905
		1906	void
		1907	ev_stat_start (EV_P_ ev_stat *w)
		1908	{
		1909	if (expect_false (ev_is_active (w)))
		1910	return;
		1911
		1912	/* since we use memcmp, we need to clear any padding data etc. */
		1913	memset (&w->prev, 0, sizeof (ev_statdata));
		1914	memset (&w->attr, 0, sizeof (ev_statdata));
		1915
		1916	ev_stat_stat (EV_A_ w);
		1917
		1918	if (w->interval < MIN_STAT_INTERVAL)
		1919	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1920
		1921	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1922	ev_set_priority (&w->timer, ev_priority (w));
		1923
		1924	#if EV_USE_INOTIFY
		1925	infy_init (EV_A);
		1926
		1927	if (fs_fd >= 0)
		1928	infy_add (EV_A_ w);
		1929	else
		1930	#endif
		1931	ev_timer_start (EV_A_ &w->timer);
		1932
		1933	ev_start (EV_A_ (W)w, 1);
		1934	}
		1935
		1936	void
		1937	ev_stat_stop (EV_P_ ev_stat *w)
		1938	{
		1939	ev_clear_pending (EV_A_ (W)w);
		1940	if (expect_false (!ev_is_active (w)))
		1941	return;
		1942
		1943	#if EV_USE_INOTIFY
		1944	infy_del (EV_A_ w);
		1945	#endif
		1946	ev_timer_stop (EV_A_ &w->timer);
		1947
		1948	ev_stop (EV_A_ (W)w);
		1949	}
		1950	#endif
		1951
		1952	void
		1953	ev_idle_start (EV_P_ ev_idle *w)
		1954	{
		1955	if (expect_false (ev_is_active (w)))
		1956	return;
		1957
		1958	ev_start (EV_A_ (W)w, ++idlecnt);
		1959	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1960	idles [idlecnt - 1] = w;
		1961	}
		1962
		1963	void
		1964	ev_idle_stop (EV_P_ ev_idle *w)
		1965	{
		1966	ev_clear_pending (EV_A_ (W)w);
		1967	if (expect_false (!ev_is_active (w)))
		1968	return;
		1969
		1970	{
		1971	int active = ((W)w)->active;
		1972	idles [active - 1] = idles [--idlecnt];
		1973	((W)idles [active - 1])->active = active;
		1974	}
		1975
		1976	ev_stop (EV_A_ (W)w);
		1977	}
		1978
		1979	void
		1980	ev_prepare_start (EV_P_ ev_prepare *w)
		1981	{
		1982	if (expect_false (ev_is_active (w)))
		1983	return;
		1984
		1985	ev_start (EV_A_ (W)w, ++preparecnt);
		1986	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1987	prepares [preparecnt - 1] = w;
		1988	}
		1989
		1990	void
		1991	ev_prepare_stop (EV_P_ ev_prepare *w)
		1992	{
		1993	ev_clear_pending (EV_A_ (W)w);
		1994	if (expect_false (!ev_is_active (w)))
		1995	return;
		1996
		1997	{
		1998	int active = ((W)w)->active;
		1999	prepares [active - 1] = prepares [--preparecnt];
		2000	((W)prepares [active - 1])->active = active;
		2001	}
		2002
		2003	ev_stop (EV_A_ (W)w);
		2004	}
		2005
		2006	void
		2007	ev_check_start (EV_P_ ev_check *w)
		2008	{
		2009	if (expect_false (ev_is_active (w)))
		2010	return;
		2011
		2012	ev_start (EV_A_ (W)w, ++checkcnt);
		2013	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2014	checks [checkcnt - 1] = w;
		2015	}
		2016
		2017	void
		2018	ev_check_stop (EV_P_ ev_check *w)
		2019	{
		2020	ev_clear_pending (EV_A_ (W)w);
		2021	if (expect_false (!ev_is_active (w)))
		2022	return;
		2023
		2024	{
		2025	int active = ((W)w)->active;
		2026	checks [active - 1] = checks [--checkcnt];
		2027	((W)checks [active - 1])->active = active;
		2028	}
		2029
		2030	ev_stop (EV_A_ (W)w);
		2031	}
		2032
		2033	#if EV_EMBED_ENABLE
		2034	void noinline
		2035	ev_embed_sweep (EV_P_ ev_embed *w)
		2036	{
		2037	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2038	}
		2039
		2040	static void
		2041	embed_cb (EV_P_ ev_io *io, int revents)
		2042	{
		2043	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2044
		2045	if (ev_cb (w))
		2046	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2047	else
		2048	ev_embed_sweep (loop, w);
		2049	}
		2050
		2051	void
		2052	ev_embed_start (EV_P_ ev_embed *w)
		2053	{
		2054	if (expect_false (ev_is_active (w)))
		2055	return;
		2056
		2057	{
		2058	struct ev_loop *loop = w->loop;
		2059	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2060	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2061	}
		2062
		2063	ev_set_priority (&w->io, ev_priority (w));
		2064	ev_io_start (EV_A_ &w->io);
		2065
		2066	ev_start (EV_A_ (W)w, 1);
		2067	}
		2068
		2069	void
		2070	ev_embed_stop (EV_P_ ev_embed *w)
		2071	{
		2072	ev_clear_pending (EV_A_ (W)w);
		2073	if (expect_false (!ev_is_active (w)))
		2074	return;
		2075
		2076	ev_io_stop (EV_A_ &w->io);
		2077
		2078	ev_stop (EV_A_ (W)w);
		2079	}
		2080	#endif
		2081
		2082	#if EV_FORK_ENABLE
		2083	void
		2084	ev_fork_start (EV_P_ ev_fork *w)
		2085	{
		2086	if (expect_false (ev_is_active (w)))
		2087	return;
		2088
		2089	ev_start (EV_A_ (W)w, ++forkcnt);
		2090	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2091	forks [forkcnt - 1] = w;
		2092	}
		2093
		2094	void
		2095	ev_fork_stop (EV_P_ ev_fork *w)
		2096	{
		2097	ev_clear_pending (EV_A_ (W)w);
		2098	if (expect_false (!ev_is_active (w)))
		2099	return;
		2100
		2101	{
		2102	int active = ((W)w)->active;
		2103	forks [active - 1] = forks [--forkcnt];
		2104	((W)forks [active - 1])->active = active;
		2105	}
		2106
		2107	ev_stop (EV_A_ (W)w);
		2108	}
		2109	#endif
		2110
641	/*****************************************************************************/	2111	/*****************************************************************************/
642	#if 1	2112
		2113	struct ev_once
		2114	{
		2115	ev_io io;
		2116	ev_timer to;
		2117	void (*cb)(int revents, void *arg);
		2118	void *arg;
		2119	};
643		2120
644	static void	2121	static void
645	sin_cb (struct ev_io *w, int revents)	2122	once_cb (EV_P_ struct ev_once *once, int revents)
646	{	2123	{
647	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2124	void (*cb)(int revents, void *arg) = once->cb;
		2125	void *arg = once->arg;
		2126
		2127	ev_io_stop (EV_A_ &once->io);
		2128	ev_timer_stop (EV_A_ &once->to);
		2129	ev_free (once);
		2130
		2131	cb (revents, arg);
648	}	2132	}
649		2133
650	static void	2134	static void
651	ocb (struct ev_timer *w, int revents)	2135	once_cb_io (EV_P_ ev_io *w, int revents)
652	{	2136	{
653	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2137	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
654	evtimer_stop (w);
655	evtimer_start (w);
656	}	2138	}
657		2139
658	static void	2140	static void
659	scb (struct ev_signal *w, int revents)	2141	once_cb_to (EV_P_ ev_timer *w, int revents)
660	{	2142	{
661	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2143	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
662	}	2144	}
663		2145
664	int main (void)	2146	void
		2147	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
665	{	2148	{
666	struct ev_io sin;	2149	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
667		2150
668	ev_init (0);	2151	if (expect_false (!once))
669
670	evw_init (&sin, sin_cb, 55);
671	evio_set (&sin, 0, EV_READ);
672	evio_start (&sin);
673
674	struct ev_timer t[10000];
675
676	#if 0
677	int i;
678	for (i = 0; i < 10000; ++i)
679	{
680	struct ev_timer *w = t + i;
681	evw_init (w, ocb, i);
682	evtimer_set_abs (w, drand48 (), 0.99775533);
683	evtimer_start (w);
684	if (drand48 () < 0.5)
685	evtimer_stop (w);
686	}	2152	{
687	#endif	2153	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
688
689	struct ev_timer t1;
690	evw_init (&t1, ocb, 0);
691	evtimer_set_abs (&t1, 5, 10);
692	evtimer_start (&t1);
693
694	struct ev_signal sig;
695	evw_init (&sig, scb, 65535);
696	evsignal_set (&sig, SIGQUIT);
697	evsignal_start (&sig);
698
699	ev_loop (0);
700
701	return 0;	2154	return;
702	}	2155	}
703		2156
704	#endif	2157	once->cb = cb;
		2158	once->arg = arg;
705		2159
		2160	ev_init (&once->io, once_cb_io);
		2161	if (fd >= 0)
		2162	{
		2163	ev_io_set (&once->io, fd, events);
		2164	ev_io_start (EV_A_ &once->io);
		2165	}
706		2166
		2167	ev_init (&once->to, once_cb_to);
		2168	if (timeout >= 0.)
		2169	{
		2170	ev_timer_set (&once->to, timeout, 0.);
		2171	ev_timer_start (EV_A_ &once->to);
		2172	}
		2173	}
707		2174
		2175	#ifdef __cplusplus
		2176	}
		2177	#endif
708		2178

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