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Comparing libev/ev.c (file contents):
Revision 1.26 by root, Wed Oct 31 21:50:15 2007 UTC vs.
Revision 1.178 by root, Tue Dec 11 18:36:11 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	/**/
		220
		221	/*
		222	* This is used to avoid floating point rounding problems.
		223	* It is added to ev_rt_now when scheduling periodics
		224	* to ensure progress, time-wise, even when rounding
		225	* errors are against us.
		226	* This value is good at least till the year 4000.
		227	* Better solutions welcome.
		228	*/
		229	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
63		230
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	231	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	232	#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 */	233	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
67		234
68	#include "ev.h"	235	#if __GNUC__ >= 3
		236	# define expect(expr,value) __builtin_expect ((expr),(value))
		237	# define noinline __attribute__ ((noinline))
		238	#else
		239	# define expect(expr,value) (expr)
		240	# define noinline
		241	# if __STDC_VERSION__ < 199901L
		242	# define inline
		243	# endif
		244	#endif
69		245
		246	#define expect_false(expr) expect ((expr) != 0, 0)
		247	#define expect_true(expr) expect ((expr) != 0, 1)
		248	#define inline_size static inline
		249
		250	#if EV_MINIMAL
		251	# define inline_speed static noinline
		252	#else
		253	# define inline_speed static inline
		254	#endif
		255
		256	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		257	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		258
		259	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		260	#define EMPTY2(a,b) /* used to suppress some warnings */
		261
70	typedef struct ev_watcher *W;	262	typedef ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	263	typedef ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	264	typedef ev_watcher_time *WT;
73		265
74	static ev_tstamp now, diff; /* monotonic clock */	266	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		267
		268	#ifdef _WIN32
		269	# include "ev_win32.c"
		270	#endif
		271
		272	/*****************************************************************************/
		273
		274	static void (*syserr_cb)(const char *msg);
		275
		276	void
		277	ev_set_syserr_cb (void (*cb)(const char *msg))
		278	{
		279	syserr_cb = cb;
		280	}
		281
		282	static void noinline
		283	syserr (const char *msg)
		284	{
		285	if (!msg)
		286	msg = "(libev) system error";
		287
		288	if (syserr_cb)
		289	syserr_cb (msg);
		290	else
		291	{
		292	perror (msg);
		293	abort ();
		294	}
		295	}
		296
		297	static void *(*alloc)(void *ptr, long size);
		298
		299	void
		300	ev_set_allocator (void *(*cb)(void *ptr, long size))
		301	{
		302	alloc = cb;
		303	}
		304
		305	inline_speed void *
		306	ev_realloc (void *ptr, long size)
		307	{
		308	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		309
		310	if (!ptr && size)
		311	{
		312	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		313	abort ();
		314	}
		315
		316	return ptr;
		317	}
		318
		319	#define ev_malloc(size) ev_realloc (0, (size))
		320	#define ev_free(ptr) ev_realloc ((ptr), 0)
		321
		322	/*****************************************************************************/
		323
		324	typedef struct
		325	{
		326	WL head;
		327	unsigned char events;
		328	unsigned char reify;
		329	#if EV_SELECT_IS_WINSOCKET
		330	SOCKET handle;
		331	#endif
		332	} ANFD;
		333
		334	typedef struct
		335	{
		336	W w;
		337	int events;
		338	} ANPENDING;
		339
		340	#if EV_USE_INOTIFY
		341	typedef struct
		342	{
		343	WL head;
		344	} ANFS;
		345	#endif
		346
		347	#if EV_MULTIPLICITY
		348
		349	struct ev_loop
		350	{
		351	ev_tstamp ev_rt_now;
		352	#define ev_rt_now ((loop)->ev_rt_now)
		353	#define VAR(name,decl) decl;
		354	#include "ev_vars.h"
		355	#undef VAR
		356	};
		357	#include "ev_wrap.h"
		358
		359	static struct ev_loop default_loop_struct;
		360	struct ev_loop *ev_default_loop_ptr;
		361
		362	#else
		363
75	ev_tstamp ev_now;	364	ev_tstamp ev_rt_now;
76	int ev_method;	365	#define VAR(name,decl) static decl;
		366	#include "ev_vars.h"
		367	#undef VAR
77		368
78	static int have_monotonic; /* runtime */	369	static int ev_default_loop_ptr;
79		370
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	371	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		372
84	/*****************************************************************************/	373	/*****************************************************************************/
85		374
86	ev_tstamp	375	ev_tstamp
87	ev_time (void)	376	ev_time (void)
88	{	377	{
89	#if HAVE_REALTIME	378	#if EV_USE_REALTIME
90	struct timespec ts;	379	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	380	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	381	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	382	#else
94	struct timeval tv;	383	struct timeval tv;
95	gettimeofday (&tv, 0);	384	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	385	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	386	#endif
98	}	387	}
99		388
100	static ev_tstamp	389	ev_tstamp inline_size
101	get_clock (void)	390	get_clock (void)
102	{	391	{
103	#if HAVE_MONOTONIC	392	#if EV_USE_MONOTONIC
104	if (have_monotonic)	393	if (expect_true (have_monotonic))
105	{	394	{
106	struct timespec ts;	395	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	396	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	397	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	398	}
110	#endif	399	#endif
111		400
112	return ev_time ();	401	return ev_time ();
113	}	402	}
114		403
		404	#if EV_MULTIPLICITY
		405	ev_tstamp
		406	ev_now (EV_P)
		407	{
		408	return ev_rt_now;
		409	}
		410	#endif
		411
		412	int inline_size
		413	array_nextsize (int elem, int cur, int cnt)
		414	{
		415	int ncur = cur + 1;
		416
		417	do
		418	ncur <<= 1;
		419	while (cnt > ncur);
		420
		421	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		422	if (elem * ncur > 4096)
		423	{
		424	ncur *= elem;
		425	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		426	ncur = ncur - sizeof (void *) * 4;
		427	ncur /= elem;
		428	}
		429
		430	return ncur;
		431	}
		432
		433	static noinline void *
		434	array_realloc (int elem, void *base, int *cur, int cnt)
		435	{
		436	*cur = array_nextsize (elem, *cur, cnt);
		437	return ev_realloc (base, elem * *cur);
		438	}
		439
115	#define array_needsize(base,cur,cnt,init) \	440	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	441	if (expect_false ((cnt) > (cur))) \
117	{ \	442	{ \
118	int newcnt = cur; \	443	int ocur_ = (cur); \
119	do \	444	(base) = (type *)array_realloc \
120	{ \	445	(sizeof (type), (base), &(cur), (cnt)); \
121	newcnt = (newcnt << 1) | 4 & ~3; \	446	init ((base) + (ocur_), (cur) - ocur_); \
122	} \	447	}
123	while ((cnt) > newcnt); \	448
		449	#if 0
		450	#define array_slim(type,stem) \
		451	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
124	\	452	{ \
125	base = realloc (base, sizeof (*base) * (newcnt)); \	453	stem ## max = array_roundsize (stem ## cnt >> 1); \
126	init (base + cur, newcnt - cur); \	454	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
127	cur = newcnt; \	455	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
128	}	456	}
		457	#endif
		458
		459	#define array_free(stem, idx) \
		460	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
129		461
130	/*****************************************************************************/	462	/*****************************************************************************/
131		463
		464	void noinline
		465	ev_feed_event (EV_P_ void *w, int revents)
		466	{
		467	W w_ = (W)w;
		468	int pri = ABSPRI (w_);
		469
		470	if (expect_false (w_->pending))
		471	pendings [pri][w_->pending - 1].events |= revents;
		472	else
		473	{
		474	w_->pending = ++pendingcnt [pri];
		475	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		476	pendings [pri][w_->pending - 1].w = w_;
		477	pendings [pri][w_->pending - 1].events = revents;
		478	}
		479	}
		480
		481	void inline_size
		482	queue_events (EV_P_ W *events, int eventcnt, int type)
		483	{
		484	int i;
		485
		486	for (i = 0; i < eventcnt; ++i)
		487	ev_feed_event (EV_A_ events [i], type);
		488	}
		489
		490	/*****************************************************************************/
		491
		492	void inline_size
		493	anfds_init (ANFD *base, int count)
		494	{
		495	while (count--)
		496	{
		497	base->head = 0;
		498	base->events = EV_NONE;
		499	base->reify = 0;
		500
		501	++base;
		502	}
		503	}
		504
		505	void inline_speed
		506	fd_event (EV_P_ int fd, int revents)
		507	{
		508	ANFD *anfd = anfds + fd;
		509	ev_io *w;
		510
		511	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		512	{
		513	int ev = w->events & revents;
		514
		515	if (ev)
		516	ev_feed_event (EV_A_ (W)w, ev);
		517	}
		518	}
		519
		520	void
		521	ev_feed_fd_event (EV_P_ int fd, int revents)
		522	{
		523	if (fd >= 0 && fd < anfdmax)
		524	fd_event (EV_A_ fd, revents);
		525	}
		526
		527	void inline_size
		528	fd_reify (EV_P)
		529	{
		530	int i;
		531
		532	for (i = 0; i < fdchangecnt; ++i)
		533	{
		534	int fd = fdchanges [i];
		535	ANFD *anfd = anfds + fd;
		536	ev_io *w;
		537
		538	int events = 0;
		539
		540	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		541	events |= w->events;
		542
		543	#if EV_SELECT_IS_WINSOCKET
		544	if (events)
		545	{
		546	unsigned long argp;
		547	anfd->handle = _get_osfhandle (fd);
		548	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		549	}
		550	#endif
		551
		552	anfd->reify = 0;
		553
		554	backend_modify (EV_A_ fd, anfd->events, events);
		555	anfd->events = events;
		556	}
		557
		558	fdchangecnt = 0;
		559	}
		560
		561	void inline_size
		562	fd_change (EV_P_ int fd)
		563	{
		564	if (expect_false (anfds [fd].reify))
		565	return;
		566
		567	anfds [fd].reify = 1;
		568
		569	++fdchangecnt;
		570	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		571	fdchanges [fdchangecnt - 1] = fd;
		572	}
		573
		574	void inline_speed
		575	fd_kill (EV_P_ int fd)
		576	{
		577	ev_io *w;
		578
		579	while ((w = (ev_io *)anfds [fd].head))
		580	{
		581	ev_io_stop (EV_A_ w);
		582	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		583	}
		584	}
		585
		586	int inline_size
		587	fd_valid (int fd)
		588	{
		589	#ifdef _WIN32
		590	return _get_osfhandle (fd) != -1;
		591	#else
		592	return fcntl (fd, F_GETFD) != -1;
		593	#endif
		594	}
		595
		596	/* called on EBADF to verify fds */
		597	static void noinline
		598	fd_ebadf (EV_P)
		599	{
		600	int fd;
		601
		602	for (fd = 0; fd < anfdmax; ++fd)
		603	if (anfds [fd].events)
		604	if (!fd_valid (fd) == -1 && errno == EBADF)
		605	fd_kill (EV_A_ fd);
		606	}
		607
		608	/* called on ENOMEM in select/poll to kill some fds and retry */
		609	static void noinline
		610	fd_enomem (EV_P)
		611	{
		612	int fd;
		613
		614	for (fd = anfdmax; fd--; )
		615	if (anfds [fd].events)
		616	{
		617	fd_kill (EV_A_ fd);
		618	return;
		619	}
		620	}
		621
		622	/* usually called after fork if backend needs to re-arm all fds from scratch */
		623	static void noinline
		624	fd_rearm_all (EV_P)
		625	{
		626	int fd;
		627
		628	for (fd = 0; fd < anfdmax; ++fd)
		629	if (anfds [fd].events)
		630	{
		631	anfds [fd].events = 0;
		632	fd_change (EV_A_ fd);
		633	}
		634	}
		635
		636	/*****************************************************************************/
		637
		638	void inline_speed
		639	upheap (WT *heap, int k)
		640	{
		641	WT w = heap [k];
		642
		643	while (k && heap [k >> 1]->at > w->at)
		644	{
		645	heap [k] = heap [k >> 1];
		646	((W)heap [k])->active = k + 1;
		647	k >>= 1;
		648	}
		649
		650	heap [k] = w;
		651	((W)heap [k])->active = k + 1;
		652
		653	}
		654
		655	void inline_speed
		656	downheap (WT *heap, int N, int k)
		657	{
		658	WT w = heap [k];
		659
		660	while (k < (N >> 1))
		661	{
		662	int j = k << 1;
		663
		664	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		665	++j;
		666
		667	if (w->at <= heap [j]->at)
		668	break;
		669
		670	heap [k] = heap [j];
		671	((W)heap [k])->active = k + 1;
		672	k = j;
		673	}
		674
		675	heap [k] = w;
		676	((W)heap [k])->active = k + 1;
		677	}
		678
		679	void inline_size
		680	adjustheap (WT *heap, int N, int k)
		681	{
		682	upheap (heap, k);
		683	downheap (heap, N, k);
		684	}
		685
		686	/*****************************************************************************/
		687
132	typedef struct	688	typedef struct
133	{	689	{
134	struct ev_io *head;	690	WL head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void
145	anfds_init (ANFD *base, int count)
146	{
147	while (count--)
148	{
149	base->head = 0;
150	base->wev = base->rev = EV_NONE;
151	++base;
152	}
153	}
154
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void
165	event (W w, int events)
166	{
167	if (w->active)
168	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;
173	}
174	}
175
176	static void
177	fd_event (int fd, int events)
178	{
179	ANFD *anfd = anfds + fd;
180	struct ev_io *w;
181
182	for (w = anfd->head; w; w = w->next)
183	{
184	int ev = w->events & events;
185
186	if (ev)
187	event ((W)w, ev);
188	}
189	}
190
191	static void
192	queue_events (W *events, int eventcnt, int type)
193	{
194	int i;
195
196	for (i = 0; i < eventcnt; ++i)
197	event (events [i], type);
198	}
199
200	/* called on EBADF to verify fds */
201	static void
202	fd_recheck (void)
203	{
204	int fd;
205
206	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	while (anfds [fd].head)
210	{
211	event ((W)anfds [fd].head, EV_ERROR);
212	evio_stop (anfds [fd].head);
213	}
214	}
215
216	/*****************************************************************************/
217
218	static struct ev_timer **timers;
219	static int timermax, timercnt;
220
221	static struct ev_periodic **periodics;
222	static int periodicmax, periodiccnt;
223
224	static void
225	upheap (WT *timers, int k)
226	{
227	WT w = timers [k];
228
229	while (k && timers [k >> 1]->at > w->at)
230	{
231	timers [k] = timers [k >> 1];
232	timers [k]->active = k + 1;
233	k >>= 1;
234	}
235
236	timers [k] = w;
237	timers [k]->active = k + 1;
238
239	}
240
241	static void
242	downheap (WT *timers, int N, int k)
243	{
244	WT w = timers [k];
245
246	while (k < (N >> 1))
247	{
248	int j = k << 1;
249
250	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
251	++j;
252
253	if (w->at <= timers [j]->at)
254	break;
255
256	timers [k] = timers [j];
257	timers [k]->active = k + 1;
258	k = j;
259	}
260
261	timers [k] = w;
262	timers [k]->active = k + 1;
263	}
264
265	/*****************************************************************************/
266
267	typedef struct
268	{
269	struct ev_signal *head;
270	sig_atomic_t gotsig;	691	sig_atomic_t volatile gotsig;
271	} ANSIG;	692	} ANSIG;
272		693
273	static ANSIG *signals;	694	static ANSIG *signals;
274	static int signalmax;	695	static int signalmax;
275		696
276	static int sigpipe [2];	697	static int sigpipe [2];
277	static sig_atomic_t gotsig;	698	static sig_atomic_t volatile gotsig;
278	static struct ev_io sigev;	699	static ev_io sigev;
279		700
280	static void	701	void inline_size
281	signals_init (ANSIG *base, int count)	702	signals_init (ANSIG *base, int count)
282	{	703	{
283	while (count--)	704	while (count--)
284	{	705	{
285	base->head = 0;	706	base->head = 0;
286	base->gotsig = 0;	707	base->gotsig = 0;
		708
287	++base;	709	++base;
288	}	710	}
289	}	711	}
290		712
291	static void	713	static void
292	sighandler (int signum)	714	sighandler (int signum)
293	{	715	{
		716	#if _WIN32
		717	signal (signum, sighandler);
		718	#endif
		719
294	signals [signum - 1].gotsig = 1;	720	signals [signum - 1].gotsig = 1;
295		721
296	if (!gotsig)	722	if (!gotsig)
297	{	723	{
		724	int old_errno = errno;
298	gotsig = 1;	725	gotsig = 1;
299	write (sigpipe [1], &gotsig, 1);	726	write (sigpipe [1], &signum, 1);
		727	errno = old_errno;
300	}	728	}
		729	}
		730
		731	void noinline
		732	ev_feed_signal_event (EV_P_ int signum)
		733	{
		734	WL w;
		735
		736	#if EV_MULTIPLICITY
		737	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		738	#endif
		739
		740	--signum;
		741
		742	if (signum < 0 || signum >= signalmax)
		743	return;
		744
		745	signals [signum].gotsig = 0;
		746
		747	for (w = signals [signum].head; w; w = w->next)
		748	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
301	}	749	}
302		750
303	static void	751	static void
304	sigcb (struct ev_io *iow, int revents)	752	sigcb (EV_P_ ev_io *iow, int revents)
305	{	753	{
306	struct ev_signal *w;
307	int sig;	754	int signum;
308		755
		756	read (sigpipe [0], &revents, 1);
309	gotsig = 0;	757	gotsig = 0;
310	read (sigpipe [0], &revents, 1);
311		758
312	for (sig = signalmax; sig--; )	759	for (signum = signalmax; signum--; )
313	if (signals [sig].gotsig)	760	if (signals [signum].gotsig)
		761	ev_feed_signal_event (EV_A_ signum + 1);
		762	}
		763
		764	void inline_speed
		765	fd_intern (int fd)
		766	{
		767	#ifdef _WIN32
		768	int arg = 1;
		769	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		770	#else
		771	fcntl (fd, F_SETFD, FD_CLOEXEC);
		772	fcntl (fd, F_SETFL, O_NONBLOCK);
		773	#endif
		774	}
		775
		776	static void noinline
		777	siginit (EV_P)
		778	{
		779	fd_intern (sigpipe [0]);
		780	fd_intern (sigpipe [1]);
		781
		782	ev_io_set (&sigev, sigpipe [0], EV_READ);
		783	ev_io_start (EV_A_ &sigev);
		784	ev_unref (EV_A); /* child watcher should not keep loop alive */
		785	}
		786
		787	/*****************************************************************************/
		788
		789	static ev_child *childs [EV_PID_HASHSIZE];
		790
		791	#ifndef _WIN32
		792
		793	static ev_signal childev;
		794
		795	void inline_speed
		796	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		797	{
		798	ev_child *w;
		799
		800	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		801	if (w->pid == pid || !w->pid)
314	{	802	{
315	signals [sig].gotsig = 0;	803	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
316		804	w->rpid = pid;
317	for (w = signals [sig].head; w; w = w->next)	805	w->rstatus = status;
318	event ((W)w, EV_SIGNAL);	806	ev_feed_event (EV_A_ (W)w, EV_CHILD);
319	}	807	}
320	}	808	}
321
322	static void
323	siginit (void)
324	{
325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327
328	/* rather than sort out wether we really need nb, set it */
329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
331
332	evio_set (&sigev, sigpipe [0], EV_READ);
333	evio_start (&sigev);
334	}
335
336	/*****************************************************************************/
337
338	static struct ev_idle **idles;
339	static int idlemax, idlecnt;
340
341	static struct ev_prepare **prepares;
342	static int preparemax, preparecnt;
343
344	static struct ev_check **checks;
345	static int checkmax, checkcnt;
346
347	/*****************************************************************************/
348
349	static struct ev_child *childs [PID_HASHSIZE];
350	static struct ev_signal childev;
351		809
352	#ifndef WCONTINUED	810	#ifndef WCONTINUED
353	# define WCONTINUED 0	811	# define WCONTINUED 0
354	#endif	812	#endif
355		813
356	static void	814	static void
357	childcb (struct ev_signal *sw, int revents)	815	childcb (EV_P_ ev_signal *sw, int revents)
358	{	816	{
359	struct ev_child *w;
360	int pid, status;	817	int pid, status;
361		818
		819	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
362	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	820	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	821	if (!WCONTINUED
364	if (w->pid == pid || w->pid == -1)	822	|| errno != EINVAL
365	{	823	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
366	w->status = status;	824	return;
367	event ((W)w, EV_CHILD);	825
368	}	826	/* make sure we are called again until all childs have been reaped */
		827	/* we need to do it this way so that the callback gets called before we continue */
		828	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		829
		830	child_reap (EV_A_ sw, pid, pid, status);
		831	if (EV_PID_HASHSIZE > 1)
		832	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
369	}	833	}
		834
		835	#endif
370		836
371	/*****************************************************************************/	837	/*****************************************************************************/
372		838
		839	#if EV_USE_PORT
		840	# include "ev_port.c"
		841	#endif
		842	#if EV_USE_KQUEUE
		843	# include "ev_kqueue.c"
		844	#endif
373	#if HAVE_EPOLL	845	#if EV_USE_EPOLL
374	# include "ev_epoll.c"	846	# include "ev_epoll.c"
375	#endif	847	#endif
		848	#if EV_USE_POLL
		849	# include "ev_poll.c"
		850	#endif
376	#if HAVE_SELECT	851	#if EV_USE_SELECT
377	# include "ev_select.c"	852	# include "ev_select.c"
378	#endif	853	#endif
379		854
380	int	855	int
381	ev_version_major (void)	856	ev_version_major (void)
…		…
387	ev_version_minor (void)	862	ev_version_minor (void)
388	{	863	{
389	return EV_VERSION_MINOR;	864	return EV_VERSION_MINOR;
390	}	865	}
391		866
392	int ev_init (int flags)	867	/* return true if we are running with elevated privileges and should ignore env variables */
		868	int inline_size
		869	enable_secure (void)
393	{	870	{
394	if (!ev_method)	871	#ifdef _WIN32
		872	return 0;
		873	#else
		874	return getuid () != geteuid ()
		875	|| getgid () != getegid ();
		876	#endif
		877	}
		878
		879	unsigned int
		880	ev_supported_backends (void)
		881	{
		882	unsigned int flags = 0;
		883
		884	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		885	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		886	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		887	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		888	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		889
		890	return flags;
		891	}
		892
		893	unsigned int
		894	ev_recommended_backends (void)
		895	{
		896	unsigned int flags = ev_supported_backends ();
		897
		898	#ifndef __NetBSD__
		899	/* kqueue is borked on everything but netbsd apparently */
		900	/* it usually doesn't work correctly on anything but sockets and pipes */
		901	flags &= ~EVBACKEND_KQUEUE;
		902	#endif
		903	#ifdef __APPLE__
		904	// flags &= ~EVBACKEND_KQUEUE; for documentation
		905	flags &= ~EVBACKEND_POLL;
		906	#endif
		907
		908	return flags;
		909	}
		910
		911	unsigned int
		912	ev_embeddable_backends (void)
		913	{
		914	return EVBACKEND_EPOLL
		915	| EVBACKEND_KQUEUE
		916	| EVBACKEND_PORT;
		917	}
		918
		919	unsigned int
		920	ev_backend (EV_P)
		921	{
		922	return backend;
		923	}
		924
		925	unsigned int
		926	ev_loop_count (EV_P)
		927	{
		928	return loop_count;
		929	}
		930
		931	static void noinline
		932	loop_init (EV_P_ unsigned int flags)
		933	{
		934	if (!backend)
395	{	935	{
396	#if HAVE_MONOTONIC	936	#if EV_USE_MONOTONIC
397	{	937	{
398	struct timespec ts;	938	struct timespec ts;
399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	939	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400	have_monotonic = 1;	940	have_monotonic = 1;
401	}	941	}
402	#endif	942	#endif
403		943
404	ev_now = ev_time ();	944	ev_rt_now = ev_time ();
405	now = get_clock ();	945	mn_now = get_clock ();
		946	now_floor = mn_now;
406	diff = ev_now - now;	947	rtmn_diff = ev_rt_now - mn_now;
407		948
		949	/* pid check not overridable via env */
		950	#ifndef _WIN32
		951	if (flags & EVFLAG_FORKCHECK)
		952	curpid = getpid ();
		953	#endif
		954
		955	if (!(flags & EVFLAG_NOENV)
		956	&& !enable_secure ()
		957	&& getenv ("LIBEV_FLAGS"))
		958	flags = atoi (getenv ("LIBEV_FLAGS"));
		959
		960	if (!(flags & 0x0000ffffUL))
		961	flags |= ev_recommended_backends ();
		962
		963	backend = 0;
		964	backend_fd = -1;
		965	#if EV_USE_INOTIFY
		966	fs_fd = -2;
		967	#endif
		968
		969	#if EV_USE_PORT
		970	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		971	#endif
		972	#if EV_USE_KQUEUE
		973	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		974	#endif
		975	#if EV_USE_EPOLL
		976	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		977	#endif
		978	#if EV_USE_POLL
		979	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		980	#endif
		981	#if EV_USE_SELECT
		982	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		983	#endif
		984
		985	ev_init (&sigev, sigcb);
		986	ev_set_priority (&sigev, EV_MAXPRI);
		987	}
		988	}
		989
		990	static void noinline
		991	loop_destroy (EV_P)
		992	{
		993	int i;
		994
		995	#if EV_USE_INOTIFY
		996	if (fs_fd >= 0)
		997	close (fs_fd);
		998	#endif
		999
		1000	if (backend_fd >= 0)
		1001	close (backend_fd);
		1002
		1003	#if EV_USE_PORT
		1004	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1005	#endif
		1006	#if EV_USE_KQUEUE
		1007	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1008	#endif
		1009	#if EV_USE_EPOLL
		1010	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1011	#endif
		1012	#if EV_USE_POLL
		1013	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1014	#endif
		1015	#if EV_USE_SELECT
		1016	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1017	#endif
		1018
		1019	for (i = NUMPRI; i--; )
		1020	{
		1021	array_free (pending, [i]);
		1022	#if EV_IDLE_ENABLE
		1023	array_free (idle, [i]);
		1024	#endif
		1025	}
		1026
		1027	/* have to use the microsoft-never-gets-it-right macro */
		1028	array_free (fdchange, EMPTY);
		1029	array_free (timer, EMPTY);
		1030	#if EV_PERIODIC_ENABLE
		1031	array_free (periodic, EMPTY);
		1032	#endif
		1033	array_free (prepare, EMPTY);
		1034	array_free (check, EMPTY);
		1035
		1036	backend = 0;
		1037	}
		1038
		1039	void inline_size infy_fork (EV_P);
		1040
		1041	void inline_size
		1042	loop_fork (EV_P)
		1043	{
		1044	#if EV_USE_PORT
		1045	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1046	#endif
		1047	#if EV_USE_KQUEUE
		1048	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1049	#endif
		1050	#if EV_USE_EPOLL
		1051	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1052	#endif
		1053	#if EV_USE_INOTIFY
		1054	infy_fork (EV_A);
		1055	#endif
		1056
		1057	if (ev_is_active (&sigev))
		1058	{
		1059	/* default loop */
		1060
		1061	ev_ref (EV_A);
		1062	ev_io_stop (EV_A_ &sigev);
		1063	close (sigpipe [0]);
		1064	close (sigpipe [1]);
		1065
		1066	while (pipe (sigpipe))
		1067	syserr ("(libev) error creating pipe");
		1068
		1069	siginit (EV_A);
		1070	}
		1071
		1072	postfork = 0;
		1073	}
		1074
		1075	#if EV_MULTIPLICITY
		1076	struct ev_loop *
		1077	ev_loop_new (unsigned int flags)
		1078	{
		1079	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1080
		1081	memset (loop, 0, sizeof (struct ev_loop));
		1082
		1083	loop_init (EV_A_ flags);
		1084
		1085	if (ev_backend (EV_A))
		1086	return loop;
		1087
		1088	return 0;
		1089	}
		1090
		1091	void
		1092	ev_loop_destroy (EV_P)
		1093	{
		1094	loop_destroy (EV_A);
		1095	ev_free (loop);
		1096	}
		1097
		1098	void
		1099	ev_loop_fork (EV_P)
		1100	{
		1101	postfork = 1;
		1102	}
		1103
		1104	#endif
		1105
		1106	#if EV_MULTIPLICITY
		1107	struct ev_loop *
		1108	ev_default_loop_init (unsigned int flags)
		1109	#else
		1110	int
		1111	ev_default_loop (unsigned int flags)
		1112	#endif
		1113	{
		1114	if (sigpipe [0] == sigpipe [1])
408	if (pipe (sigpipe))	1115	if (pipe (sigpipe))
409	return 0;	1116	return 0;
410		1117
411	ev_method = EVMETHOD_NONE;	1118	if (!ev_default_loop_ptr)
412	#if HAVE_EPOLL	1119	{
413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	1120	#if EV_MULTIPLICITY
		1121	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1122	#else
		1123	ev_default_loop_ptr = 1;
414	#endif	1124	#endif
415	#if HAVE_SELECT
416	if (ev_method == EVMETHOD_NONE) select_init (flags);
417	#endif
418		1125
419	if (ev_method)	1126	loop_init (EV_A_ flags);
		1127
		1128	if (ev_backend (EV_A))
420	{	1129	{
421	evw_init (&sigev, sigcb);
422	siginit ();	1130	siginit (EV_A);
423		1131
		1132	#ifndef _WIN32
424	evsignal_init (&childev, childcb, SIGCHLD);	1133	ev_signal_init (&childev, childcb, SIGCHLD);
		1134	ev_set_priority (&childev, EV_MAXPRI);
425	evsignal_start (&childev);	1135	ev_signal_start (EV_A_ &childev);
		1136	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1137	#endif
426	}	1138	}
		1139	else
		1140	ev_default_loop_ptr = 0;
427	}	1141	}
428		1142
429	return ev_method;	1143	return ev_default_loop_ptr;
		1144	}
		1145
		1146	void
		1147	ev_default_destroy (void)
		1148	{
		1149	#if EV_MULTIPLICITY
		1150	struct ev_loop *loop = ev_default_loop_ptr;
		1151	#endif
		1152
		1153	#ifndef _WIN32
		1154	ev_ref (EV_A); /* child watcher */
		1155	ev_signal_stop (EV_A_ &childev);
		1156	#endif
		1157
		1158	ev_ref (EV_A); /* signal watcher */
		1159	ev_io_stop (EV_A_ &sigev);
		1160
		1161	close (sigpipe [0]); sigpipe [0] = 0;
		1162	close (sigpipe [1]); sigpipe [1] = 0;
		1163
		1164	loop_destroy (EV_A);
		1165	}
		1166
		1167	void
		1168	ev_default_fork (void)
		1169	{
		1170	#if EV_MULTIPLICITY
		1171	struct ev_loop *loop = ev_default_loop_ptr;
		1172	#endif
		1173
		1174	if (backend)
		1175	postfork = 1;
430	}	1176	}
431		1177
432	/*****************************************************************************/	1178	/*****************************************************************************/
433		1179
434	void	1180	void
435	ev_prefork (void)	1181	ev_invoke (EV_P_ void *w, int revents)
436	{	1182	{
437	/* nop */	1183	EV_CB_INVOKE ((W)w, revents);
438	}	1184	}
439		1185
440	void	1186	void inline_speed
441	ev_postfork_parent (void)	1187	call_pending (EV_P)
442	{	1188	{
443	/* nop */
444	}
445
446	void
447	ev_postfork_child (void)
448	{
449	#if HAVE_EPOLL
450	if (ev_method == EVMETHOD_EPOLL)
451	epoll_postfork_child ();
452	#endif
453
454	evio_stop (&sigev);
455	close (sigpipe [0]);
456	close (sigpipe [1]);
457	pipe (sigpipe);
458	siginit ();
459	}
460
461	/*****************************************************************************/
462
463	static void
464	fd_reify (void)
465	{
466	int i;	1189	int pri;
467		1190
468	for (i = 0; i < fdchangecnt; ++i)	1191	for (pri = NUMPRI; pri--; )
		1192	while (pendingcnt [pri])
469	{	1193	{
470	int fd = fdchanges [i];	1194	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
471	ANFD *anfd = anfds + fd;
472	struct ev_io *w;
473		1195
474	int wev = 0;	1196	if (expect_true (p->w))
475
476	for (w = anfd->head; w; w = w->next)
477	wev |= w->events;
478
479	if (anfd->wev != wev)
480	{	1197	{
481	method_modify (fd, anfd->wev, wev);	1198	/*assert (("non-pending watcher on pending list", p->w->pending));*/
482	anfd->wev = wev;
483	}
484	}
485		1199
486	fdchangecnt = 0;
487	}
488
489	static void
490	call_pending (void)
491	{
492	while (pendingcnt)
493	{
494	ANPENDING *p = pendings + --pendingcnt;
495
496	if (p->w)
497	{
498	p->w->pending = 0;	1200	p->w->pending = 0;
499	p->w->cb (p->w, p->events);	1201	EV_CB_INVOKE (p->w, p->events);
500	}	1202	}
501	}	1203	}
502	}	1204	}
503		1205
504	static void	1206	void inline_size
505	timers_reify (void)	1207	timers_reify (EV_P)
506	{	1208	{
507	while (timercnt && timers [0]->at <= now)	1209	while (timercnt && ((WT)timers [0])->at <= mn_now)
508	{	1210	{
509	struct ev_timer *w = timers [0];	1211	ev_timer *w = timers [0];
510		1212
511	event ((W)w, EV_TIMEOUT);	1213	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
512		1214
513	/* first reschedule or stop timer */	1215	/* first reschedule or stop timer */
514	if (w->repeat)	1216	if (w->repeat)
515	{	1217	{
		1218	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1219
516	w->at = now + w->repeat;	1220	((WT)w)->at += w->repeat;
517	assert (("timer timeout in the past, negative repeat?", w->at > now));	1221	if (((WT)w)->at < mn_now)
		1222	((WT)w)->at = mn_now;
		1223
518	downheap ((WT *)timers, timercnt, 0);	1224	downheap ((WT *)timers, timercnt, 0);
519	}	1225	}
520	else	1226	else
521	evtimer_stop (w); /* nonrepeating: stop timer */	1227	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522	}
523	}
524		1228
525	static void	1229	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1230	}
		1231	}
		1232
		1233	#if EV_PERIODIC_ENABLE
		1234	void inline_size
526	periodics_reify (void)	1235	periodics_reify (EV_P)
527	{	1236	{
528	while (periodiccnt && periodics [0]->at <= ev_now)	1237	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
529	{	1238	{
530	struct ev_periodic *w = periodics [0];	1239	ev_periodic *w = periodics [0];
		1240
		1241	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
531		1242
532	/* first reschedule or stop timer */	1243	/* first reschedule or stop timer */
533	if (w->interval)	1244	if (w->reschedule_cb)
534	{	1245	{
		1246	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1247	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1248	downheap ((WT *)periodics, periodiccnt, 0);
		1249	}
		1250	else if (w->interval)
		1251	{
535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1252	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1253	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1254	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
537	downheap ((WT *)periodics, periodiccnt, 0);	1255	downheap ((WT *)periodics, periodiccnt, 0);
538	}	1256	}
539	else	1257	else
540	evperiodic_stop (w); /* nonrepeating: stop timer */	1258	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541		1259
542	event ((W)w, EV_TIMEOUT);	1260	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
543	}	1261	}
544	}	1262	}
545		1263
546	static void	1264	static void noinline
547	periodics_reschedule (ev_tstamp diff)	1265	periodics_reschedule (EV_P)
548	{	1266	{
549	int i;	1267	int i;
550		1268
551	/* adjust periodics after time jump */	1269	/* adjust periodics after time jump */
552	for (i = 0; i < periodiccnt; ++i)	1270	for (i = 0; i < periodiccnt; ++i)
553	{	1271	{
554	struct ev_periodic *w = periodics [i];	1272	ev_periodic *w = periodics [i];
555		1273
		1274	if (w->reschedule_cb)
		1275	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
556	if (w->interval)	1276	else if (w->interval)
		1277	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1278	}
		1279
		1280	/* now rebuild the heap */
		1281	for (i = periodiccnt >> 1; i--; )
		1282	downheap ((WT *)periodics, periodiccnt, i);
		1283	}
		1284	#endif
		1285
		1286	#if EV_IDLE_ENABLE
		1287	void inline_size
		1288	idle_reify (EV_P)
		1289	{
		1290	if (expect_false (idleall))
		1291	{
		1292	int pri;
		1293
		1294	for (pri = NUMPRI; pri--; )
557	{	1295	{
558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1296	if (pendingcnt [pri])
		1297	break;
559		1298
560	if (fabs (diff) >= 1e-4)	1299	if (idlecnt [pri])
561	{	1300	{
562	evperiodic_stop (w);	1301	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
563	evperiodic_start (w);	1302	break;
564
565	i = 0; /* restart loop, inefficient, but time jumps should be rare */
566	}	1303	}
567	}	1304	}
568	}	1305	}
569	}	1306	}
		1307	#endif
570		1308
571	static void	1309	void inline_speed
572	time_update (void)	1310	time_update (EV_P_ ev_tstamp max_block)
573	{	1311	{
574	int i;	1312	int i;
575		1313
576	ev_now = ev_time ();	1314	#if EV_USE_MONOTONIC
577
578	if (have_monotonic)	1315	if (expect_true (have_monotonic))
579	{	1316	{
580	ev_tstamp odiff = diff;	1317	ev_tstamp odiff = rtmn_diff;
581		1318
582	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1319	mn_now = get_clock ();
		1320
		1321	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1322	/* interpolate in the meantime */
		1323	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
583	{	1324	{
584	now = get_clock ();	1325	ev_rt_now = rtmn_diff + mn_now;
		1326	return;
		1327	}
		1328
		1329	now_floor = mn_now;
		1330	ev_rt_now = ev_time ();
		1331
		1332	/* loop a few times, before making important decisions.
		1333	* on the choice of "4": one iteration isn't enough,
		1334	* in case we get preempted during the calls to
		1335	* ev_time and get_clock. a second call is almost guaranteed
		1336	* to succeed in that case, though. and looping a few more times
		1337	* doesn't hurt either as we only do this on time-jumps or
		1338	* in the unlikely event of having been preempted here.
		1339	*/
		1340	for (i = 4; --i; )
		1341	{
585	diff = ev_now - now;	1342	rtmn_diff = ev_rt_now - mn_now;
586		1343
587	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1344	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
588	return; /* all is well */	1345	return; /* all is well */
589		1346
590	ev_now = ev_time ();	1347	ev_rt_now = ev_time ();
		1348	mn_now = get_clock ();
		1349	now_floor = mn_now;
591	}	1350	}
592		1351
		1352	# if EV_PERIODIC_ENABLE
593	periodics_reschedule (diff - odiff);	1353	periodics_reschedule (EV_A);
		1354	# endif
594	/* no timer adjustment, as the monotonic clock doesn't jump */	1355	/* no timer adjustment, as the monotonic clock doesn't jump */
		1356	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
595	}	1357	}
596	else	1358	else
		1359	#endif
597	{	1360	{
598	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1361	ev_rt_now = ev_time ();
		1362
		1363	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
599	{	1364	{
		1365	#if EV_PERIODIC_ENABLE
600	periodics_reschedule (ev_now - now);	1366	periodics_reschedule (EV_A);
601		1367	#endif
602	/* adjust timers. this is easy, as the offset is the same for all */	1368	/* adjust timers. this is easy, as the offset is the same for all of them */
603	for (i = 0; i < timercnt; ++i)	1369	for (i = 0; i < timercnt; ++i)
604	timers [i]->at += diff;	1370	((WT)timers [i])->at += ev_rt_now - mn_now;
605	}	1371	}
606		1372
607	now = ev_now;	1373	mn_now = ev_rt_now;
608	}	1374	}
609	}	1375	}
610		1376
611	int ev_loop_done;	1377	void
		1378	ev_ref (EV_P)
		1379	{
		1380	++activecnt;
		1381	}
612		1382
		1383	void
		1384	ev_unref (EV_P)
		1385	{
		1386	--activecnt;
		1387	}
		1388
		1389	static int loop_done;
		1390
		1391	void
613	void ev_loop (int flags)	1392	ev_loop (EV_P_ int flags)
614	{	1393	{
615	double block;
616	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1394	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1395	? EVUNLOOP_ONE
		1396	: EVUNLOOP_CANCEL;
		1397
		1398	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
617		1399
618	do	1400	do
619	{	1401	{
		1402	#ifndef _WIN32
		1403	if (expect_false (curpid)) /* penalise the forking check even more */
		1404	if (expect_false (getpid () != curpid))
		1405	{
		1406	curpid = getpid ();
		1407	postfork = 1;
		1408	}
		1409	#endif
		1410
		1411	#if EV_FORK_ENABLE
		1412	/* we might have forked, so queue fork handlers */
		1413	if (expect_false (postfork))
		1414	if (forkcnt)
		1415	{
		1416	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1417	call_pending (EV_A);
		1418	}
		1419	#endif
		1420
620	/* queue check watchers (and execute them) */	1421	/* queue prepare watchers (and execute them) */
621	if (preparecnt)	1422	if (expect_false (preparecnt))
622	{	1423	{
623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1424	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624	call_pending ();	1425	call_pending (EV_A);
625	}	1426	}
626		1427
		1428	if (expect_false (!activecnt))
		1429	break;
		1430
		1431	/* we might have forked, so reify kernel state if necessary */
		1432	if (expect_false (postfork))
		1433	loop_fork (EV_A);
		1434
627	/* update fd-related kernel structures */	1435	/* update fd-related kernel structures */
628	fd_reify ();	1436	fd_reify (EV_A);
629		1437
630	/* calculate blocking time */	1438	/* calculate blocking time */
		1439	{
		1440	ev_tstamp block;
631		1441
632	/* we only need this for !monotonic clockor timers, but as we basically	1442	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
633	always have timers, we just calculate it always */	1443	block = 0.; /* do not block at all */
634	ev_now = ev_time ();
635
636	if (flags & EVLOOP_NONBLOCK || idlecnt)
637	block = 0.;
638	else	1444	else
639	{	1445	{
		1446	/* update time to cancel out callback processing overhead */
		1447	time_update (EV_A_ 1e100);
		1448
640	block = MAX_BLOCKTIME;	1449	block = MAX_BLOCKTIME;
641		1450
642	if (timercnt)	1451	if (timercnt)
643	{	1452	{
644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1453	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
645	if (block > to) block = to;	1454	if (block > to) block = to;
646	}	1455	}
647		1456
		1457	#if EV_PERIODIC_ENABLE
648	if (periodiccnt)	1458	if (periodiccnt)
649	{	1459	{
650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1460	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
651	if (block > to) block = to;	1461	if (block > to) block = to;
652	}	1462	}
		1463	#endif
653		1464
654	if (block < 0.) block = 0.;	1465	if (expect_false (block < 0.)) block = 0.;
655	}	1466	}
656		1467
657	method_poll (block);	1468	++loop_count;
		1469	backend_poll (EV_A_ block);
658		1470
659	/* update ev_now, do magic */	1471	/* update ev_rt_now, do magic */
660	time_update ();	1472	time_update (EV_A_ block);
		1473	}
661		1474
662	/* queue pending timers and reschedule them */	1475	/* queue pending timers and reschedule them */
663	timers_reify (); /* relative timers called last */	1476	timers_reify (EV_A); /* relative timers called last */
		1477	#if EV_PERIODIC_ENABLE
664	periodics_reify (); /* absolute timers called first */	1478	periodics_reify (EV_A); /* absolute timers called first */
		1479	#endif
665		1480
		1481	#if EV_IDLE_ENABLE
666	/* queue idle watchers unless io or timers are pending */	1482	/* queue idle watchers unless other events are pending */
667	if (!pendingcnt)	1483	idle_reify (EV_A);
668	queue_events ((W *)idles, idlecnt, EV_IDLE);	1484	#endif
669		1485
670	/* queue check watchers, to be executed first */	1486	/* queue check watchers, to be executed first */
671	if (checkcnt)	1487	if (expect_false (checkcnt))
672	queue_events ((W *)checks, checkcnt, EV_CHECK);	1488	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673		1489
674	call_pending ();	1490	call_pending (EV_A);
675	}
676	while (!ev_loop_done);
677		1491
678	if (ev_loop_done != 2)	1492	}
		1493	while (expect_true (activecnt && !loop_done));
		1494
		1495	if (loop_done == EVUNLOOP_ONE)
		1496	loop_done = EVUNLOOP_CANCEL;
		1497	}
		1498
		1499	void
		1500	ev_unloop (EV_P_ int how)
		1501	{
679	ev_loop_done = 0;	1502	loop_done = how;
680	}	1503	}
681		1504
682	/*****************************************************************************/	1505	/*****************************************************************************/
683		1506
684	static void	1507	void inline_size
685	wlist_add (WL *head, WL elem)	1508	wlist_add (WL *head, WL elem)
686	{	1509	{
687	elem->next = *head;	1510	elem->next = *head;
688	*head = elem;	1511	*head = elem;
689	}	1512	}
690		1513
691	static void	1514	void inline_size
692	wlist_del (WL *head, WL elem)	1515	wlist_del (WL *head, WL elem)
693	{	1516	{
694	while (*head)	1517	while (*head)
695	{	1518	{
696	if (*head == elem)	1519	if (*head == elem)
…		…
701		1524
702	head = &(*head)->next;	1525	head = &(*head)->next;
703	}	1526	}
704	}	1527	}
705		1528
706	static void	1529	void inline_speed
707	ev_clear (W w)	1530	clear_pending (EV_P_ W w)
708	{	1531	{
709	if (w->pending)	1532	if (w->pending)
710	{	1533	{
711	pendings [w->pending - 1].w = 0;	1534	pendings [ABSPRI (w)][w->pending - 1].w = 0;
712	w->pending = 0;	1535	w->pending = 0;
713	}	1536	}
714	}	1537	}
715		1538
716	static void	1539	int
		1540	ev_clear_pending (EV_P_ void *w)
		1541	{
		1542	W w_ = (W)w;
		1543	int pending = w_->pending;
		1544
		1545	if (expect_true (pending))
		1546	{
		1547	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1548	w_->pending = 0;
		1549	p->w = 0;
		1550	return p->events;
		1551	}
		1552	else
		1553	return 0;
		1554	}
		1555
		1556	void inline_size
		1557	pri_adjust (EV_P_ W w)
		1558	{
		1559	int pri = w->priority;
		1560	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1561	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1562	w->priority = pri;
		1563	}
		1564
		1565	void inline_speed
717	ev_start (W w, int active)	1566	ev_start (EV_P_ W w, int active)
718	{	1567	{
		1568	pri_adjust (EV_A_ w);
719	w->active = active;	1569	w->active = active;
		1570	ev_ref (EV_A);
720	}	1571	}
721		1572
722	static void	1573	void inline_size
723	ev_stop (W w)	1574	ev_stop (EV_P_ W w)
724	{	1575	{
		1576	ev_unref (EV_A);
725	w->active = 0;	1577	w->active = 0;
726	}	1578	}
727		1579
728	/*****************************************************************************/	1580	/*****************************************************************************/
729		1581
730	void	1582	void noinline
731	evio_start (struct ev_io *w)	1583	ev_io_start (EV_P_ ev_io *w)
732	{	1584	{
733	if (ev_is_active (w))
734	return;
735
736	int fd = w->fd;	1585	int fd = w->fd;
737		1586
		1587	if (expect_false (ev_is_active (w)))
		1588	return;
		1589
		1590	assert (("ev_io_start called with negative fd", fd >= 0));
		1591
738	ev_start ((W)w, 1);	1592	ev_start (EV_A_ (W)w, 1);
739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1593	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
740	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1594	wlist_add ((WL *)&anfds[fd].head, (WL)w);
741		1595
742	++fdchangecnt;	1596	fd_change (EV_A_ fd);
743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
744	fdchanges [fdchangecnt - 1] = fd;
745
746	if (w->fd == 9)
747	printf ("start %p:%x\n", w, w->events);//D
748	}	1597	}
749		1598
750	void	1599	void noinline
751	evio_stop (struct ev_io *w)	1600	ev_io_stop (EV_P_ ev_io *w)
752	{	1601	{
753	if (w->fd == 9)	1602	clear_pending (EV_A_ (W)w);
754	printf ("stop %p:%x\n", w, w->events);//D
755	ev_clear ((W)w);
756	if (!ev_is_active (w))	1603	if (expect_false (!ev_is_active (w)))
757	return;	1604	return;
		1605
		1606	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
758		1607
759	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1608	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
760	ev_stop ((W)w);	1609	ev_stop (EV_A_ (W)w);
761		1610
762	++fdchangecnt;	1611	fd_change (EV_A_ w->fd);
763	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
764	fdchanges [fdchangecnt - 1] = w->fd;
765	}	1612	}
766		1613
767	void	1614	void noinline
768	evtimer_start (struct ev_timer *w)	1615	ev_timer_start (EV_P_ ev_timer *w)
769	{	1616	{
770	if (ev_is_active (w))	1617	if (expect_false (ev_is_active (w)))
771	return;	1618	return;
772		1619
773	w->at += now;	1620	((WT)w)->at += mn_now;
774		1621
775	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1622	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
776		1623
777	ev_start ((W)w, ++timercnt);	1624	ev_start (EV_A_ (W)w, ++timercnt);
778	array_needsize (timers, timermax, timercnt, );	1625	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
779	timers [timercnt - 1] = w;	1626	timers [timercnt - 1] = w;
780	upheap ((WT *)timers, timercnt - 1);	1627	upheap ((WT *)timers, timercnt - 1);
781	}
782		1628
783	void	1629	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1630	}
		1631
		1632	void noinline
784	evtimer_stop (struct ev_timer *w)	1633	ev_timer_stop (EV_P_ ev_timer *w)
785	{	1634	{
786	ev_clear ((W)w);	1635	clear_pending (EV_A_ (W)w);
787	if (!ev_is_active (w))	1636	if (expect_false (!ev_is_active (w)))
788	return;	1637	return;
789		1638
790	if (w->active < timercnt--)	1639	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1640
		1641	{
		1642	int active = ((W)w)->active;
		1643
		1644	if (expect_true (--active < --timercnt))
791	{	1645	{
792	timers [w->active - 1] = timers [timercnt];	1646	timers [active] = timers [timercnt];
793	downheap ((WT *)timers, timercnt, w->active - 1);	1647	adjustheap ((WT *)timers, timercnt, active);
794	}	1648	}
		1649	}
795		1650
796	w->at = w->repeat;	1651	((WT)w)->at -= mn_now;
797		1652
798	ev_stop ((W)w);	1653	ev_stop (EV_A_ (W)w);
799	}	1654	}
800		1655
801	void	1656	void noinline
802	evtimer_again (struct ev_timer *w)	1657	ev_timer_again (EV_P_ ev_timer *w)
803	{	1658	{
804	if (ev_is_active (w))	1659	if (ev_is_active (w))
805	{	1660	{
806	if (w->repeat)	1661	if (w->repeat)
807	{	1662	{
808	w->at = now + w->repeat;	1663	((WT)w)->at = mn_now + w->repeat;
809	downheap ((WT *)timers, timercnt, w->active - 1);	1664	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
810	}	1665	}
811	else	1666	else
812	evtimer_stop (w);	1667	ev_timer_stop (EV_A_ w);
813	}	1668	}
814	else if (w->repeat)	1669	else if (w->repeat)
		1670	{
		1671	w->at = w->repeat;
815	evtimer_start (w);	1672	ev_timer_start (EV_A_ w);
		1673	}
816	}	1674	}
817		1675
818	void	1676	#if EV_PERIODIC_ENABLE
		1677	void noinline
819	evperiodic_start (struct ev_periodic *w)	1678	ev_periodic_start (EV_P_ ev_periodic *w)
820	{	1679	{
821	if (ev_is_active (w))	1680	if (expect_false (ev_is_active (w)))
822	return;	1681	return;
823		1682
824	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1683	if (w->reschedule_cb)
825		1684	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1685	else if (w->interval)
		1686	{
		1687	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
826	/* this formula differs from the one in periodic_reify because we do not always round up */	1688	/* this formula differs from the one in periodic_reify because we do not always round up */
827	if (w->interval)
828	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1689	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1690	}
		1691	else
		1692	((WT)w)->at = w->offset;
829		1693
830	ev_start ((W)w, ++periodiccnt);	1694	ev_start (EV_A_ (W)w, ++periodiccnt);
831	array_needsize (periodics, periodicmax, periodiccnt, );	1695	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
832	periodics [periodiccnt - 1] = w;	1696	periodics [periodiccnt - 1] = w;
833	upheap ((WT *)periodics, periodiccnt - 1);	1697	upheap ((WT *)periodics, periodiccnt - 1);
834	}
835		1698
836	void	1699	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1700	}
		1701
		1702	void noinline
837	evperiodic_stop (struct ev_periodic *w)	1703	ev_periodic_stop (EV_P_ ev_periodic *w)
838	{	1704	{
839	ev_clear ((W)w);	1705	clear_pending (EV_A_ (W)w);
840	if (!ev_is_active (w))	1706	if (expect_false (!ev_is_active (w)))
841	return;	1707	return;
842		1708
843	if (w->active < periodiccnt--)	1709	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1710
		1711	{
		1712	int active = ((W)w)->active;
		1713
		1714	if (expect_true (--active < --periodiccnt))
844	{	1715	{
845	periodics [w->active - 1] = periodics [periodiccnt];	1716	periodics [active] = periodics [periodiccnt];
846	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1717	adjustheap ((WT *)periodics, periodiccnt, active);
847	}	1718	}
		1719	}
848		1720
849	ev_stop ((W)w);	1721	ev_stop (EV_A_ (W)w);
850	}	1722	}
851		1723
852	void	1724	void noinline
		1725	ev_periodic_again (EV_P_ ev_periodic *w)
		1726	{
		1727	/* TODO: use adjustheap and recalculation */
		1728	ev_periodic_stop (EV_A_ w);
		1729	ev_periodic_start (EV_A_ w);
		1730	}
		1731	#endif
		1732
		1733	#ifndef SA_RESTART
		1734	# define SA_RESTART 0
		1735	#endif
		1736
		1737	void noinline
853	evsignal_start (struct ev_signal *w)	1738	ev_signal_start (EV_P_ ev_signal *w)
854	{	1739	{
		1740	#if EV_MULTIPLICITY
		1741	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1742	#endif
855	if (ev_is_active (w))	1743	if (expect_false (ev_is_active (w)))
856	return;	1744	return;
857		1745
		1746	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1747
858	ev_start ((W)w, 1);	1748	ev_start (EV_A_ (W)w, 1);
859	array_needsize (signals, signalmax, w->signum, signals_init);	1749	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
860	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1750	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
861		1751
862	if (!w->next)	1752	if (!((WL)w)->next)
863	{	1753	{
		1754	#if _WIN32
		1755	signal (w->signum, sighandler);
		1756	#else
864	struct sigaction sa;	1757	struct sigaction sa;
865	sa.sa_handler = sighandler;	1758	sa.sa_handler = sighandler;
866	sigfillset (&sa.sa_mask);	1759	sigfillset (&sa.sa_mask);
867	sa.sa_flags = 0;	1760	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
868	sigaction (w->signum, &sa, 0);	1761	sigaction (w->signum, &sa, 0);
		1762	#endif
869	}	1763	}
870	}	1764	}
871		1765
872	void	1766	void noinline
873	evsignal_stop (struct ev_signal *w)	1767	ev_signal_stop (EV_P_ ev_signal *w)
874	{	1768	{
875	ev_clear ((W)w);	1769	clear_pending (EV_A_ (W)w);
876	if (!ev_is_active (w))	1770	if (expect_false (!ev_is_active (w)))
877	return;	1771	return;
878		1772
879	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1773	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
880	ev_stop ((W)w);	1774	ev_stop (EV_A_ (W)w);
881		1775
882	if (!signals [w->signum - 1].head)	1776	if (!signals [w->signum - 1].head)
883	signal (w->signum, SIG_DFL);	1777	signal (w->signum, SIG_DFL);
884	}	1778	}
885		1779
886	void evidle_start (struct ev_idle *w)	1780	void
		1781	ev_child_start (EV_P_ ev_child *w)
887	{	1782	{
		1783	#if EV_MULTIPLICITY
		1784	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1785	#endif
888	if (ev_is_active (w))	1786	if (expect_false (ev_is_active (w)))
889	return;	1787	return;
890		1788
891	ev_start ((W)w, ++idlecnt);	1789	ev_start (EV_A_ (W)w, 1);
892	array_needsize (idles, idlemax, idlecnt, );	1790	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
893	idles [idlecnt - 1] = w;
894	}	1791	}
895		1792
896	void evidle_stop (struct ev_idle *w)	1793	void
		1794	ev_child_stop (EV_P_ ev_child *w)
897	{	1795	{
898	ev_clear ((W)w);	1796	clear_pending (EV_A_ (W)w);
899	if (ev_is_active (w))	1797	if (expect_false (!ev_is_active (w)))
900	return;	1798	return;
901		1799
902	idles [w->active - 1] = idles [--idlecnt];	1800	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
903	ev_stop ((W)w);	1801	ev_stop (EV_A_ (W)w);
904	}	1802	}
905		1803
		1804	#if EV_STAT_ENABLE
		1805
		1806	# ifdef _WIN32
		1807	# undef lstat
		1808	# define lstat(a,b) _stati64 (a,b)
		1809	# endif
		1810
		1811	#define DEF_STAT_INTERVAL 5.0074891
		1812	#define MIN_STAT_INTERVAL 0.1074891
		1813
		1814	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1815
		1816	#if EV_USE_INOTIFY
		1817	# define EV_INOTIFY_BUFSIZE 8192
		1818
		1819	static void noinline
		1820	infy_add (EV_P_ ev_stat *w)
		1821	{
		1822	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);
		1823
		1824	if (w->wd < 0)
		1825	{
		1826	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1827
		1828	/* monitor some parent directory for speedup hints */
		1829	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1830	{
		1831	char path [4096];
		1832	strcpy (path, w->path);
		1833
		1834	do
		1835	{
		1836	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1837	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1838
		1839	char *pend = strrchr (path, '/');
		1840
		1841	if (!pend)
		1842	break; /* whoops, no '/', complain to your admin */
		1843
		1844	*pend = 0;
		1845	w->wd = inotify_add_watch (fs_fd, path, mask);
		1846	}
		1847	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1848	}
		1849	}
		1850	else
		1851	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1852
		1853	if (w->wd >= 0)
		1854	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1855	}
		1856
		1857	static void noinline
		1858	infy_del (EV_P_ ev_stat *w)
		1859	{
		1860	int slot;
		1861	int wd = w->wd;
		1862
		1863	if (wd < 0)
		1864	return;
		1865
		1866	w->wd = -2;
		1867	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1868	wlist_del (&fs_hash [slot].head, (WL)w);
		1869
		1870	/* remove this watcher, if others are watching it, they will rearm */
		1871	inotify_rm_watch (fs_fd, wd);
		1872	}
		1873
		1874	static void noinline
		1875	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1876	{
		1877	if (slot < 0)
		1878	/* overflow, need to check for all hahs slots */
		1879	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1880	infy_wd (EV_A_ slot, wd, ev);
		1881	else
		1882	{
		1883	WL w_;
		1884
		1885	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1886	{
		1887	ev_stat *w = (ev_stat *)w_;
		1888	w_ = w_->next; /* lets us remove this watcher and all before it */
		1889
		1890	if (w->wd == wd || wd == -1)
		1891	{
		1892	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1893	{
		1894	w->wd = -1;
		1895	infy_add (EV_A_ w); /* re-add, no matter what */
		1896	}
		1897
		1898	stat_timer_cb (EV_A_ &w->timer, 0);
		1899	}
		1900	}
		1901	}
		1902	}
		1903
		1904	static void
		1905	infy_cb (EV_P_ ev_io *w, int revents)
		1906	{
		1907	char buf [EV_INOTIFY_BUFSIZE];
		1908	struct inotify_event *ev = (struct inotify_event *)buf;
		1909	int ofs;
		1910	int len = read (fs_fd, buf, sizeof (buf));
		1911
		1912	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1913	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1914	}
		1915
		1916	void inline_size
		1917	infy_init (EV_P)
		1918	{
		1919	if (fs_fd != -2)
		1920	return;
		1921
		1922	fs_fd = inotify_init ();
		1923
		1924	if (fs_fd >= 0)
		1925	{
		1926	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1927	ev_set_priority (&fs_w, EV_MAXPRI);
		1928	ev_io_start (EV_A_ &fs_w);
		1929	}
		1930	}
		1931
		1932	void inline_size
		1933	infy_fork (EV_P)
		1934	{
		1935	int slot;
		1936
		1937	if (fs_fd < 0)
		1938	return;
		1939
		1940	close (fs_fd);
		1941	fs_fd = inotify_init ();
		1942
		1943	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1944	{
		1945	WL w_ = fs_hash [slot].head;
		1946	fs_hash [slot].head = 0;
		1947
		1948	while (w_)
		1949	{
		1950	ev_stat *w = (ev_stat *)w_;
		1951	w_ = w_->next; /* lets us add this watcher */
		1952
		1953	w->wd = -1;
		1954
		1955	if (fs_fd >= 0)
		1956	infy_add (EV_A_ w); /* re-add, no matter what */
		1957	else
		1958	ev_timer_start (EV_A_ &w->timer);
		1959	}
		1960
		1961	}
		1962	}
		1963
		1964	#endif
		1965
		1966	void
		1967	ev_stat_stat (EV_P_ ev_stat *w)
		1968	{
		1969	if (lstat (w->path, &w->attr) < 0)
		1970	w->attr.st_nlink = 0;
		1971	else if (!w->attr.st_nlink)
		1972	w->attr.st_nlink = 1;
		1973	}
		1974
		1975	static void noinline
		1976	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1977	{
		1978	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1979
		1980	/* we copy this here each the time so that */
		1981	/* prev has the old value when the callback gets invoked */
		1982	w->prev = w->attr;
		1983	ev_stat_stat (EV_A_ w);
		1984
		1985	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		1986	if (
		1987	w->prev.st_dev != w->attr.st_dev
		1988	|| w->prev.st_ino != w->attr.st_ino
		1989	|| w->prev.st_mode != w->attr.st_mode
		1990	|| w->prev.st_nlink != w->attr.st_nlink
		1991	|| w->prev.st_uid != w->attr.st_uid
		1992	|| w->prev.st_gid != w->attr.st_gid
		1993	|| w->prev.st_rdev != w->attr.st_rdev
		1994	|| w->prev.st_size != w->attr.st_size
		1995	|| w->prev.st_atime != w->attr.st_atime
		1996	|| w->prev.st_mtime != w->attr.st_mtime
		1997	|| w->prev.st_ctime != w->attr.st_ctime
		1998	) {
		1999	#if EV_USE_INOTIFY
		2000	infy_del (EV_A_ w);
		2001	infy_add (EV_A_ w);
		2002	ev_stat_stat (EV_A_ w); /* avoid race... */
		2003	#endif
		2004
		2005	ev_feed_event (EV_A_ w, EV_STAT);
		2006	}
		2007	}
		2008
		2009	void
		2010	ev_stat_start (EV_P_ ev_stat *w)
		2011	{
		2012	if (expect_false (ev_is_active (w)))
		2013	return;
		2014
		2015	/* since we use memcmp, we need to clear any padding data etc. */
		2016	memset (&w->prev, 0, sizeof (ev_statdata));
		2017	memset (&w->attr, 0, sizeof (ev_statdata));
		2018
		2019	ev_stat_stat (EV_A_ w);
		2020
		2021	if (w->interval < MIN_STAT_INTERVAL)
		2022	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2023
		2024	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2025	ev_set_priority (&w->timer, ev_priority (w));
		2026
		2027	#if EV_USE_INOTIFY
		2028	infy_init (EV_A);
		2029
		2030	if (fs_fd >= 0)
		2031	infy_add (EV_A_ w);
		2032	else
		2033	#endif
		2034	ev_timer_start (EV_A_ &w->timer);
		2035
		2036	ev_start (EV_A_ (W)w, 1);
		2037	}
		2038
		2039	void
		2040	ev_stat_stop (EV_P_ ev_stat *w)
		2041	{
		2042	clear_pending (EV_A_ (W)w);
		2043	if (expect_false (!ev_is_active (w)))
		2044	return;
		2045
		2046	#if EV_USE_INOTIFY
		2047	infy_del (EV_A_ w);
		2048	#endif
		2049	ev_timer_stop (EV_A_ &w->timer);
		2050
		2051	ev_stop (EV_A_ (W)w);
		2052	}
		2053	#endif
		2054
		2055	#if EV_IDLE_ENABLE
		2056	void
		2057	ev_idle_start (EV_P_ ev_idle *w)
		2058	{
		2059	if (expect_false (ev_is_active (w)))
		2060	return;
		2061
		2062	pri_adjust (EV_A_ (W)w);
		2063
		2064	{
		2065	int active = ++idlecnt [ABSPRI (w)];
		2066
		2067	++idleall;
		2068	ev_start (EV_A_ (W)w, active);
		2069
		2070	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2071	idles [ABSPRI (w)][active - 1] = w;
		2072	}
		2073	}
		2074
		2075	void
		2076	ev_idle_stop (EV_P_ ev_idle *w)
		2077	{
		2078	clear_pending (EV_A_ (W)w);
		2079	if (expect_false (!ev_is_active (w)))
		2080	return;
		2081
		2082	{
		2083	int active = ((W)w)->active;
		2084
		2085	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2086	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2087
		2088	ev_stop (EV_A_ (W)w);
		2089	--idleall;
		2090	}
		2091	}
		2092	#endif
		2093
		2094	void
906	void evprepare_start (struct ev_prepare *w)	2095	ev_prepare_start (EV_P_ ev_prepare *w)
907	{	2096	{
908	if (ev_is_active (w))	2097	if (expect_false (ev_is_active (w)))
909	return;	2098	return;
910		2099
911	ev_start ((W)w, ++preparecnt);	2100	ev_start (EV_A_ (W)w, ++preparecnt);
912	array_needsize (prepares, preparemax, preparecnt, );	2101	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
913	prepares [preparecnt - 1] = w;	2102	prepares [preparecnt - 1] = w;
914	}	2103	}
915		2104
		2105	void
916	void evprepare_stop (struct ev_prepare *w)	2106	ev_prepare_stop (EV_P_ ev_prepare *w)
917	{	2107	{
918	ev_clear ((W)w);	2108	clear_pending (EV_A_ (W)w);
919	if (ev_is_active (w))	2109	if (expect_false (!ev_is_active (w)))
920	return;	2110	return;
921		2111
		2112	{
		2113	int active = ((W)w)->active;
922	prepares [w->active - 1] = prepares [--preparecnt];	2114	prepares [active - 1] = prepares [--preparecnt];
		2115	((W)prepares [active - 1])->active = active;
		2116	}
		2117
923	ev_stop ((W)w);	2118	ev_stop (EV_A_ (W)w);
924	}	2119	}
925		2120
		2121	void
926	void evcheck_start (struct ev_check *w)	2122	ev_check_start (EV_P_ ev_check *w)
927	{	2123	{
928	if (ev_is_active (w))	2124	if (expect_false (ev_is_active (w)))
929	return;	2125	return;
930		2126
931	ev_start ((W)w, ++checkcnt);	2127	ev_start (EV_A_ (W)w, ++checkcnt);
932	array_needsize (checks, checkmax, checkcnt, );	2128	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
933	checks [checkcnt - 1] = w;	2129	checks [checkcnt - 1] = w;
934	}	2130	}
935		2131
		2132	void
936	void evcheck_stop (struct ev_check *w)	2133	ev_check_stop (EV_P_ ev_check *w)
937	{	2134	{
938	ev_clear ((W)w);	2135	clear_pending (EV_A_ (W)w);
939	if (ev_is_active (w))	2136	if (expect_false (!ev_is_active (w)))
940	return;	2137	return;
941		2138
		2139	{
		2140	int active = ((W)w)->active;
942	checks [w->active - 1] = checks [--checkcnt];	2141	checks [active - 1] = checks [--checkcnt];
		2142	((W)checks [active - 1])->active = active;
		2143	}
		2144
943	ev_stop ((W)w);	2145	ev_stop (EV_A_ (W)w);
944	}	2146	}
945		2147
946	void evchild_start (struct ev_child *w)	2148	#if EV_EMBED_ENABLE
		2149	void noinline
		2150	ev_embed_sweep (EV_P_ ev_embed *w)
947	{	2151	{
		2152	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2153	}
		2154
		2155	static void
		2156	embed_cb (EV_P_ ev_io *io, int revents)
		2157	{
		2158	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2159
948	if (ev_is_active (w))	2160	if (ev_cb (w))
949	return;	2161	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2162	else
		2163	ev_embed_sweep (loop, w);
		2164	}
950		2165
		2166	void
		2167	ev_embed_start (EV_P_ ev_embed *w)
		2168	{
		2169	if (expect_false (ev_is_active (w)))
		2170	return;
		2171
		2172	{
		2173	struct ev_loop *loop = w->loop;
		2174	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2175	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2176	}
		2177
		2178	ev_set_priority (&w->io, ev_priority (w));
		2179	ev_io_start (EV_A_ &w->io);
		2180
951	ev_start ((W)w, 1);	2181	ev_start (EV_A_ (W)w, 1);
952	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
953	}	2182	}
954		2183
955	void evchild_stop (struct ev_child *w)	2184	void
		2185	ev_embed_stop (EV_P_ ev_embed *w)
956	{	2186	{
957	ev_clear ((W)w);	2187	clear_pending (EV_A_ (W)w);
958	if (ev_is_active (w))	2188	if (expect_false (!ev_is_active (w)))
959	return;	2189	return;
960		2190
961	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2191	ev_io_stop (EV_A_ &w->io);
		2192
962	ev_stop ((W)w);	2193	ev_stop (EV_A_ (W)w);
963	}	2194	}
		2195	#endif
		2196
		2197	#if EV_FORK_ENABLE
		2198	void
		2199	ev_fork_start (EV_P_ ev_fork *w)
		2200	{
		2201	if (expect_false (ev_is_active (w)))
		2202	return;
		2203
		2204	ev_start (EV_A_ (W)w, ++forkcnt);
		2205	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2206	forks [forkcnt - 1] = w;
		2207	}
		2208
		2209	void
		2210	ev_fork_stop (EV_P_ ev_fork *w)
		2211	{
		2212	clear_pending (EV_A_ (W)w);
		2213	if (expect_false (!ev_is_active (w)))
		2214	return;
		2215
		2216	{
		2217	int active = ((W)w)->active;
		2218	forks [active - 1] = forks [--forkcnt];
		2219	((W)forks [active - 1])->active = active;
		2220	}
		2221
		2222	ev_stop (EV_A_ (W)w);
		2223	}
		2224	#endif
964		2225
965	/*****************************************************************************/	2226	/*****************************************************************************/
966		2227
967	struct ev_once	2228	struct ev_once
968	{	2229	{
969	struct ev_io io;	2230	ev_io io;
970	struct ev_timer to;	2231	ev_timer to;
971	void (*cb)(int revents, void *arg);	2232	void (*cb)(int revents, void *arg);
972	void *arg;	2233	void *arg;
973	};	2234	};
974		2235
975	static void	2236	static void
976	once_cb (struct ev_once *once, int revents)	2237	once_cb (EV_P_ struct ev_once *once, int revents)
977	{	2238	{
978	void (*cb)(int revents, void *arg) = once->cb;	2239	void (*cb)(int revents, void *arg) = once->cb;
979	void *arg = once->arg;	2240	void *arg = once->arg;
980		2241
981	evio_stop (&once->io);	2242	ev_io_stop (EV_A_ &once->io);
982	evtimer_stop (&once->to);	2243	ev_timer_stop (EV_A_ &once->to);
983	free (once);	2244	ev_free (once);
984		2245
985	cb (revents, arg);	2246	cb (revents, arg);
986	}	2247	}
987		2248
988	static void	2249	static void
989	once_cb_io (struct ev_io *w, int revents)	2250	once_cb_io (EV_P_ ev_io *w, int revents)
990	{	2251	{
991	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2252	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
992	}	2253	}
993		2254
994	static void	2255	static void
995	once_cb_to (struct ev_timer *w, int revents)	2256	once_cb_to (EV_P_ ev_timer *w, int revents)
996	{	2257	{
997	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2258	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
998	}	2259	}
999		2260
1000	void	2261	void
1001	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2262	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1002	{	2263	{
1003	struct ev_once *once = malloc (sizeof (struct ev_once));	2264	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1004		2265
1005	if (!once)	2266	if (expect_false (!once))
1006	cb (EV_ERROR, arg);	2267	{
1007	else	2268	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		2269	return;
1008	{	2270	}
		2271
1009	once->cb = cb;	2272	once->cb = cb;
1010	once->arg = arg;	2273	once->arg = arg;
1011		2274
1012	evw_init (&once->io, once_cb_io);	2275	ev_init (&once->io, once_cb_io);
1013
1014	if (fd >= 0)	2276	if (fd >= 0)
1015	{	2277	{
1016	evio_set (&once->io, fd, events);	2278	ev_io_set (&once->io, fd, events);
1017	evio_start (&once->io);	2279	ev_io_start (EV_A_ &once->io);
1018	}	2280	}
1019		2281
1020	evw_init (&once->to, once_cb_to);	2282	ev_init (&once->to, once_cb_to);
1021
1022	if (timeout >= 0.)	2283	if (timeout >= 0.)
1023	{	2284	{
1024	evtimer_set (&once->to, timeout, 0.);	2285	ev_timer_set (&once->to, timeout, 0.);
1025	evtimer_start (&once->to);	2286	ev_timer_start (EV_A_ &once->to);
1026	}
1027	}
1028	}
1029
1030	/*****************************************************************************/
1031
1032	#if 0
1033
1034	struct ev_io wio;
1035
1036	static void
1037	sin_cb (struct ev_io *w, int revents)
1038	{
1039	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1040	}
1041
1042	static void
1043	ocb (struct ev_timer *w, int revents)
1044	{
1045	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1046	evtimer_stop (w);
1047	evtimer_start (w);
1048	}
1049
1050	static void
1051	scb (struct ev_signal *w, int revents)
1052	{
1053	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1054	evio_stop (&wio);
1055	evio_start (&wio);
1056	}
1057
1058	static void
1059	gcb (struct ev_signal *w, int revents)
1060	{
1061	fprintf (stderr, "generic %x\n", revents);
1062
1063	}
1064
1065	int main (void)
1066	{
1067	ev_init (0);
1068
1069	evio_init (&wio, sin_cb, 0, EV_READ);
1070	evio_start (&wio);
1071
1072	struct ev_timer t[10000];
1073
1074	#if 0
1075	int i;
1076	for (i = 0; i < 10000; ++i)
1077	{	2287	}
1078	struct ev_timer *w = t + i;
1079	evw_init (w, ocb, i);
1080	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1081	evtimer_start (w);
1082	if (drand48 () < 0.5)
1083	evtimer_stop (w);
1084	}
1085	#endif
1086
1087	struct ev_timer t1;
1088	evtimer_init (&t1, ocb, 5, 10);
1089	evtimer_start (&t1);
1090
1091	struct ev_signal sig;
1092	evsignal_init (&sig, scb, SIGQUIT);
1093	evsignal_start (&sig);
1094
1095	struct ev_check cw;
1096	evcheck_init (&cw, gcb);
1097	evcheck_start (&cw);
1098
1099	struct ev_idle iw;
1100	evidle_init (&iw, gcb);
1101	evidle_start (&iw);
1102
1103	ev_loop (0);
1104
1105	return 0;
1106	}	2288	}
1107		2289
		2290	#ifdef __cplusplus
		2291	}
1108	#endif	2292	#endif
1109		2293
1110
1111
1112

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