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Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.180 by root, Tue Dec 11 22:04:55 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_speed
		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)
		644	{
		645	int p = (k - 1) >> 1;
		646
		647	if (heap [p]->at <= w->at)
		648	break;
		649
		650	heap [k] = heap [p];
		651	((W)heap [k])->active = k + 1;
		652	k = p;
		653	}
		654
		655	heap [k] = w;
		656	((W)heap [k])->active = k + 1;
		657
		658	}
		659
		660	void inline_speed
		661	downheap (WT *heap, int N, int k)
		662	{
		663	WT w = heap [k];
		664
		665	for (;;)
		666	{
		667	int c = (k << 1) + 1;
		668
		669	if (c >= N)
		670	break;
		671
		672	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		673	? 1 : 0;
		674
		675	if (w->at <= heap [c]->at)
		676	break;
		677
		678	heap [k] = heap [c];
		679	((W)heap [k])->active = k + 1;
		680
		681	k = c;
		682	}
		683
		684	heap [k] = w;
		685	((W)heap [k])->active = k + 1;
		686	}
		687
		688	void inline_size
		689	adjustheap (WT *heap, int N, int k)
		690	{
		691	upheap (heap, k);
		692	downheap (heap, N, k);
		693	}
		694
		695	/*****************************************************************************/
		696
132	typedef struct	697	typedef struct
133	{	698	{
134	struct ev_io *head;	699	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 ()
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	evio_stop (anfds [fd].head);
211	}
212
213	/*****************************************************************************/
214
215	static struct ev_timer **timers;
216	static int timermax, timercnt;
217
218	static struct ev_periodic **periodics;
219	static int periodicmax, periodiccnt;
220
221	static void
222	upheap (WT *timers, int k)
223	{
224	WT w = timers [k];
225
226	while (k && timers [k >> 1]->at > w->at)
227	{
228	timers [k] = timers [k >> 1];
229	timers [k]->active = k + 1;
230	k >>= 1;
231	}
232
233	timers [k] = w;
234	timers [k]->active = k + 1;
235
236	}
237
238	static void
239	downheap (WT *timers, int N, int k)
240	{
241	WT w = timers [k];
242
243	while (k < (N >> 1))
244	{
245	int j = k << 1;
246
247	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
248	++j;
249
250	if (w->at <= timers [j]->at)
251	break;
252
253	timers [k] = timers [j];
254	timers [k]->active = k + 1;
255	k = j;
256	}
257
258	timers [k] = w;
259	timers [k]->active = k + 1;
260	}
261
262	/*****************************************************************************/
263
264	typedef struct
265	{
266	struct ev_signal *head;
267	sig_atomic_t gotsig;	700	sig_atomic_t volatile gotsig;
268	} ANSIG;	701	} ANSIG;
269		702
270	static ANSIG *signals;	703	static ANSIG *signals;
271	static int signalmax;	704	static int signalmax;
272		705
273	static int sigpipe [2];	706	static int sigpipe [2];
274	static sig_atomic_t gotsig;	707	static sig_atomic_t volatile gotsig;
275	static struct ev_io sigev;	708	static ev_io sigev;
276		709
277	static void	710	void inline_size
278	signals_init (ANSIG *base, int count)	711	signals_init (ANSIG *base, int count)
279	{	712	{
280	while (count--)	713	while (count--)
281	{	714	{
282	base->head = 0;	715	base->head = 0;
283	base->gotsig = 0;	716	base->gotsig = 0;
		717
284	++base;	718	++base;
285	}	719	}
286	}	720	}
287		721
288	static void	722	static void
289	sighandler (int signum)	723	sighandler (int signum)
290	{	724	{
		725	#if _WIN32
		726	signal (signum, sighandler);
		727	#endif
		728
291	signals [signum - 1].gotsig = 1;	729	signals [signum - 1].gotsig = 1;
292		730
293	if (!gotsig)	731	if (!gotsig)
294	{	732	{
		733	int old_errno = errno;
295	gotsig = 1;	734	gotsig = 1;
296	write (sigpipe [1], &gotsig, 1);	735	write (sigpipe [1], &signum, 1);
		736	errno = old_errno;
297	}	737	}
		738	}
		739
		740	void noinline
		741	ev_feed_signal_event (EV_P_ int signum)
		742	{
		743	WL w;
		744
		745	#if EV_MULTIPLICITY
		746	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		747	#endif
		748
		749	--signum;
		750
		751	if (signum < 0 || signum >= signalmax)
		752	return;
		753
		754	signals [signum].gotsig = 0;
		755
		756	for (w = signals [signum].head; w; w = w->next)
		757	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
298	}	758	}
299		759
300	static void	760	static void
301	sigcb (struct ev_io *iow, int revents)	761	sigcb (EV_P_ ev_io *iow, int revents)
302	{	762	{
303	struct ev_signal *w;
304	int sig;	763	int signum;
305		764
		765	read (sigpipe [0], &revents, 1);
306	gotsig = 0;	766	gotsig = 0;
307	read (sigpipe [0], &revents, 1);
308		767
309	for (sig = signalmax; sig--; )	768	for (signum = signalmax; signum--; )
310	if (signals [sig].gotsig)	769	if (signals [signum].gotsig)
		770	ev_feed_signal_event (EV_A_ signum + 1);
		771	}
		772
		773	void inline_speed
		774	fd_intern (int fd)
		775	{
		776	#ifdef _WIN32
		777	int arg = 1;
		778	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		779	#else
		780	fcntl (fd, F_SETFD, FD_CLOEXEC);
		781	fcntl (fd, F_SETFL, O_NONBLOCK);
		782	#endif
		783	}
		784
		785	static void noinline
		786	siginit (EV_P)
		787	{
		788	fd_intern (sigpipe [0]);
		789	fd_intern (sigpipe [1]);
		790
		791	ev_io_set (&sigev, sigpipe [0], EV_READ);
		792	ev_io_start (EV_A_ &sigev);
		793	ev_unref (EV_A); /* child watcher should not keep loop alive */
		794	}
		795
		796	/*****************************************************************************/
		797
		798	static ev_child *childs [EV_PID_HASHSIZE];
		799
		800	#ifndef _WIN32
		801
		802	static ev_signal childev;
		803
		804	void inline_speed
		805	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		806	{
		807	ev_child *w;
		808
		809	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		810	if (w->pid == pid || !w->pid)
311	{	811	{
312	signals [sig].gotsig = 0;	812	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
313		813	w->rpid = pid;
314	for (w = signals [sig].head; w; w = w->next)	814	w->rstatus = status;
315	event ((W)w, EV_SIGNAL);	815	ev_feed_event (EV_A_ (W)w, EV_CHILD);
316	}	816	}
317	}	817	}
318
319	static void
320	siginit (void)
321	{
322	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
323	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
324
325	/* rather than sort out wether we really need nb, set it */
326	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
327	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
328
329	evio_set (&sigev, sigpipe [0], EV_READ);
330	evio_start (&sigev);
331	}
332
333	/*****************************************************************************/
334
335	static struct ev_idle **idles;
336	static int idlemax, idlecnt;
337
338	static struct ev_prepare **prepares;
339	static int preparemax, preparecnt;
340
341	static struct ev_check **checks;
342	static int checkmax, checkcnt;
343
344	/*****************************************************************************/
345
346	static struct ev_child *childs [PID_HASHSIZE];
347	static struct ev_signal childev;
348		818
349	#ifndef WCONTINUED	819	#ifndef WCONTINUED
350	# define WCONTINUED 0	820	# define WCONTINUED 0
351	#endif	821	#endif
352		822
353	static void	823	static void
354	childcb (struct ev_signal *sw, int revents)	824	childcb (EV_P_ ev_signal *sw, int revents)
355	{	825	{
356	struct ev_child *w;
357	int pid, status;	826	int pid, status;
358		827
		828	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
359	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	829	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
360	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	830	if (!WCONTINUED
361	if (w->pid == pid || w->pid == -1)	831	|| errno != EINVAL
362	{	832	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
363	w->status = status;	833	return;
364	event ((W)w, EV_CHILD);	834
365	}	835	/* make sure we are called again until all childs have been reaped */
		836	/* we need to do it this way so that the callback gets called before we continue */
		837	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		838
		839	child_reap (EV_A_ sw, pid, pid, status);
		840	if (EV_PID_HASHSIZE > 1)
		841	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
366	}	842	}
		843
		844	#endif
367		845
368	/*****************************************************************************/	846	/*****************************************************************************/
369		847
		848	#if EV_USE_PORT
		849	# include "ev_port.c"
		850	#endif
		851	#if EV_USE_KQUEUE
		852	# include "ev_kqueue.c"
		853	#endif
370	#if HAVE_EPOLL	854	#if EV_USE_EPOLL
371	# include "ev_epoll.c"	855	# include "ev_epoll.c"
372	#endif	856	#endif
		857	#if EV_USE_POLL
		858	# include "ev_poll.c"
		859	#endif
373	#if HAVE_SELECT	860	#if EV_USE_SELECT
374	# include "ev_select.c"	861	# include "ev_select.c"
375	#endif	862	#endif
376		863
377	int ev_init (int flags)	864	int
		865	ev_version_major (void)
378	{	866	{
379	if (!ev_method)	867	return EV_VERSION_MAJOR;
		868	}
		869
		870	int
		871	ev_version_minor (void)
		872	{
		873	return EV_VERSION_MINOR;
		874	}
		875
		876	/* return true if we are running with elevated privileges and should ignore env variables */
		877	int inline_size
		878	enable_secure (void)
		879	{
		880	#ifdef _WIN32
		881	return 0;
		882	#else
		883	return getuid () != geteuid ()
		884	|| getgid () != getegid ();
		885	#endif
		886	}
		887
		888	unsigned int
		889	ev_supported_backends (void)
		890	{
		891	unsigned int flags = 0;
		892
		893	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		894	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		895	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		896	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		897	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		898
		899	return flags;
		900	}
		901
		902	unsigned int
		903	ev_recommended_backends (void)
		904	{
		905	unsigned int flags = ev_supported_backends ();
		906
		907	#ifndef __NetBSD__
		908	/* kqueue is borked on everything but netbsd apparently */
		909	/* it usually doesn't work correctly on anything but sockets and pipes */
		910	flags &= ~EVBACKEND_KQUEUE;
		911	#endif
		912	#ifdef __APPLE__
		913	// flags &= ~EVBACKEND_KQUEUE; for documentation
		914	flags &= ~EVBACKEND_POLL;
		915	#endif
		916
		917	return flags;
		918	}
		919
		920	unsigned int
		921	ev_embeddable_backends (void)
		922	{
		923	return EVBACKEND_EPOLL
		924	| EVBACKEND_KQUEUE
		925	| EVBACKEND_PORT;
		926	}
		927
		928	unsigned int
		929	ev_backend (EV_P)
		930	{
		931	return backend;
		932	}
		933
		934	unsigned int
		935	ev_loop_count (EV_P)
		936	{
		937	return loop_count;
		938	}
		939
		940	static void noinline
		941	loop_init (EV_P_ unsigned int flags)
		942	{
		943	if (!backend)
380	{	944	{
381	#if HAVE_MONOTONIC	945	#if EV_USE_MONOTONIC
382	{	946	{
383	struct timespec ts;	947	struct timespec ts;
384	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	948	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
385	have_monotonic = 1;	949	have_monotonic = 1;
386	}	950	}
387	#endif	951	#endif
388		952
389	ev_now = ev_time ();	953	ev_rt_now = ev_time ();
390	now = get_clock ();	954	mn_now = get_clock ();
		955	now_floor = mn_now;
391	diff = ev_now - now;	956	rtmn_diff = ev_rt_now - mn_now;
392		957
		958	/* pid check not overridable via env */
		959	#ifndef _WIN32
		960	if (flags & EVFLAG_FORKCHECK)
		961	curpid = getpid ();
		962	#endif
		963
		964	if (!(flags & EVFLAG_NOENV)
		965	&& !enable_secure ()
		966	&& getenv ("LIBEV_FLAGS"))
		967	flags = atoi (getenv ("LIBEV_FLAGS"));
		968
		969	if (!(flags & 0x0000ffffUL))
		970	flags |= ev_recommended_backends ();
		971
		972	backend = 0;
		973	backend_fd = -1;
		974	#if EV_USE_INOTIFY
		975	fs_fd = -2;
		976	#endif
		977
		978	#if EV_USE_PORT
		979	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		980	#endif
		981	#if EV_USE_KQUEUE
		982	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		983	#endif
		984	#if EV_USE_EPOLL
		985	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		986	#endif
		987	#if EV_USE_POLL
		988	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		989	#endif
		990	#if EV_USE_SELECT
		991	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		992	#endif
		993
		994	ev_init (&sigev, sigcb);
		995	ev_set_priority (&sigev, EV_MAXPRI);
		996	}
		997	}
		998
		999	static void noinline
		1000	loop_destroy (EV_P)
		1001	{
		1002	int i;
		1003
		1004	#if EV_USE_INOTIFY
		1005	if (fs_fd >= 0)
		1006	close (fs_fd);
		1007	#endif
		1008
		1009	if (backend_fd >= 0)
		1010	close (backend_fd);
		1011
		1012	#if EV_USE_PORT
		1013	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1014	#endif
		1015	#if EV_USE_KQUEUE
		1016	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1017	#endif
		1018	#if EV_USE_EPOLL
		1019	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1020	#endif
		1021	#if EV_USE_POLL
		1022	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1023	#endif
		1024	#if EV_USE_SELECT
		1025	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1026	#endif
		1027
		1028	for (i = NUMPRI; i--; )
		1029	{
		1030	array_free (pending, [i]);
		1031	#if EV_IDLE_ENABLE
		1032	array_free (idle, [i]);
		1033	#endif
		1034	}
		1035
		1036	/* have to use the microsoft-never-gets-it-right macro */
		1037	array_free (fdchange, EMPTY);
		1038	array_free (timer, EMPTY);
		1039	#if EV_PERIODIC_ENABLE
		1040	array_free (periodic, EMPTY);
		1041	#endif
		1042	array_free (prepare, EMPTY);
		1043	array_free (check, EMPTY);
		1044
		1045	backend = 0;
		1046	}
		1047
		1048	void inline_size infy_fork (EV_P);
		1049
		1050	void inline_size
		1051	loop_fork (EV_P)
		1052	{
		1053	#if EV_USE_PORT
		1054	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1055	#endif
		1056	#if EV_USE_KQUEUE
		1057	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1058	#endif
		1059	#if EV_USE_EPOLL
		1060	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1061	#endif
		1062	#if EV_USE_INOTIFY
		1063	infy_fork (EV_A);
		1064	#endif
		1065
		1066	if (ev_is_active (&sigev))
		1067	{
		1068	/* default loop */
		1069
		1070	ev_ref (EV_A);
		1071	ev_io_stop (EV_A_ &sigev);
		1072	close (sigpipe [0]);
		1073	close (sigpipe [1]);
		1074
		1075	while (pipe (sigpipe))
		1076	syserr ("(libev) error creating pipe");
		1077
		1078	siginit (EV_A);
		1079	}
		1080
		1081	postfork = 0;
		1082	}
		1083
		1084	#if EV_MULTIPLICITY
		1085	struct ev_loop *
		1086	ev_loop_new (unsigned int flags)
		1087	{
		1088	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1089
		1090	memset (loop, 0, sizeof (struct ev_loop));
		1091
		1092	loop_init (EV_A_ flags);
		1093
		1094	if (ev_backend (EV_A))
		1095	return loop;
		1096
		1097	return 0;
		1098	}
		1099
		1100	void
		1101	ev_loop_destroy (EV_P)
		1102	{
		1103	loop_destroy (EV_A);
		1104	ev_free (loop);
		1105	}
		1106
		1107	void
		1108	ev_loop_fork (EV_P)
		1109	{
		1110	postfork = 1;
		1111	}
		1112
		1113	#endif
		1114
		1115	#if EV_MULTIPLICITY
		1116	struct ev_loop *
		1117	ev_default_loop_init (unsigned int flags)
		1118	#else
		1119	int
		1120	ev_default_loop (unsigned int flags)
		1121	#endif
		1122	{
		1123	if (sigpipe [0] == sigpipe [1])
393	if (pipe (sigpipe))	1124	if (pipe (sigpipe))
394	return 0;	1125	return 0;
395		1126
396	ev_method = EVMETHOD_NONE;	1127	if (!ev_default_loop_ptr)
397	#if HAVE_EPOLL	1128	{
398	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	1129	#if EV_MULTIPLICITY
		1130	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1131	#else
		1132	ev_default_loop_ptr = 1;
399	#endif	1133	#endif
400	#if HAVE_SELECT
401	if (ev_method == EVMETHOD_NONE) select_init (flags);
402	#endif
403		1134
404	if (ev_method)	1135	loop_init (EV_A_ flags);
		1136
		1137	if (ev_backend (EV_A))
405	{	1138	{
406	evw_init (&sigev, sigcb);
407	siginit ();	1139	siginit (EV_A);
408		1140
		1141	#ifndef _WIN32
409	evsignal_init (&childev, childcb, SIGCHLD);	1142	ev_signal_init (&childev, childcb, SIGCHLD);
		1143	ev_set_priority (&childev, EV_MAXPRI);
410	evsignal_start (&childev);	1144	ev_signal_start (EV_A_ &childev);
		1145	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1146	#endif
411	}	1147	}
		1148	else
		1149	ev_default_loop_ptr = 0;
412	}	1150	}
413		1151
414	return ev_method;	1152	return ev_default_loop_ptr;
		1153	}
		1154
		1155	void
		1156	ev_default_destroy (void)
		1157	{
		1158	#if EV_MULTIPLICITY
		1159	struct ev_loop *loop = ev_default_loop_ptr;
		1160	#endif
		1161
		1162	#ifndef _WIN32
		1163	ev_ref (EV_A); /* child watcher */
		1164	ev_signal_stop (EV_A_ &childev);
		1165	#endif
		1166
		1167	ev_ref (EV_A); /* signal watcher */
		1168	ev_io_stop (EV_A_ &sigev);
		1169
		1170	close (sigpipe [0]); sigpipe [0] = 0;
		1171	close (sigpipe [1]); sigpipe [1] = 0;
		1172
		1173	loop_destroy (EV_A);
		1174	}
		1175
		1176	void
		1177	ev_default_fork (void)
		1178	{
		1179	#if EV_MULTIPLICITY
		1180	struct ev_loop *loop = ev_default_loop_ptr;
		1181	#endif
		1182
		1183	if (backend)
		1184	postfork = 1;
415	}	1185	}
416		1186
417	/*****************************************************************************/	1187	/*****************************************************************************/
418		1188
419	void ev_prefork (void)	1189	void
		1190	ev_invoke (EV_P_ void *w, int revents)
420	{	1191	{
421	/* nop */	1192	EV_CB_INVOKE ((W)w, revents);
422	}	1193	}
423		1194
424	void ev_postfork_parent (void)	1195	void inline_speed
		1196	call_pending (EV_P)
425	{	1197	{
426	/* nop */
427	}
428
429	void ev_postfork_child (void)
430	{
431	#if HAVE_EPOLL
432	if (ev_method == EVMETHOD_EPOLL)
433	epoll_postfork_child ();
434	#endif
435
436	evio_stop (&sigev);
437	close (sigpipe [0]);
438	close (sigpipe [1]);
439	pipe (sigpipe);
440	siginit ();
441	}
442
443	/*****************************************************************************/
444
445	static void
446	fd_reify (void)
447	{
448	int i;	1198	int pri;
449		1199
450	for (i = 0; i < fdchangecnt; ++i)	1200	for (pri = NUMPRI; pri--; )
		1201	while (pendingcnt [pri])
451	{	1202	{
452	int fd = fdchanges [i];	1203	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
453	ANFD *anfd = anfds + fd;
454	struct ev_io *w;
455		1204
456	int wev = 0;	1205	if (expect_true (p->w))
457
458	for (w = anfd->head; w; w = w->next)
459	wev |= w->events;
460
461	if (anfd->wev != wev)
462	{	1206	{
463	method_modify (fd, anfd->wev, wev);	1207	/*assert (("non-pending watcher on pending list", p->w->pending));*/
464	anfd->wev = wev;
465	}
466	}
467		1208
468	fdchangecnt = 0;
469	}
470
471	static void
472	call_pending ()
473	{
474	while (pendingcnt)
475	{
476	ANPENDING *p = pendings + --pendingcnt;
477
478	if (p->w)
479	{
480	p->w->pending = 0;	1209	p->w->pending = 0;
481	p->w->cb (p->w, p->events);	1210	EV_CB_INVOKE (p->w, p->events);
482	}	1211	}
483	}	1212	}
484	}	1213	}
485		1214
486	static void	1215	void inline_size
487	timers_reify ()	1216	timers_reify (EV_P)
488	{	1217	{
489	while (timercnt && timers [0]->at <= now)	1218	while (timercnt && ((WT)timers [0])->at <= mn_now)
490	{	1219	{
491	struct ev_timer *w = timers [0];	1220	ev_timer *w = timers [0];
492		1221
493	event ((W)w, EV_TIMEOUT);	1222	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
494		1223
495	/* first reschedule or stop timer */	1224	/* first reschedule or stop timer */
496	if (w->repeat)	1225	if (w->repeat)
497	{	1226	{
		1227	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1228
498	w->at = now + w->repeat;	1229	((WT)w)->at += w->repeat;
499	assert (("timer timeout in the past, negative repeat?", w->at > now));	1230	if (((WT)w)->at < mn_now)
		1231	((WT)w)->at = mn_now;
		1232
500	downheap ((WT *)timers, timercnt, 0);	1233	downheap ((WT *)timers, timercnt, 0);
501	}	1234	}
502	else	1235	else
503	evtimer_stop (w); /* nonrepeating: stop timer */	1236	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
504	}
505	}
506		1237
507	static void	1238	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1239	}
		1240	}
		1241
		1242	#if EV_PERIODIC_ENABLE
		1243	void inline_size
508	periodics_reify ()	1244	periodics_reify (EV_P)
509	{	1245	{
510	while (periodiccnt && periodics [0]->at <= ev_now)	1246	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
511	{	1247	{
512	struct ev_periodic *w = periodics [0];	1248	ev_periodic *w = periodics [0];
		1249
		1250	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
513		1251
514	/* first reschedule or stop timer */	1252	/* first reschedule or stop timer */
515	if (w->interval)	1253	if (w->reschedule_cb)
516	{	1254	{
		1255	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1256	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1257	downheap ((WT *)periodics, periodiccnt, 0);
		1258	}
		1259	else if (w->interval)
		1260	{
517	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1261	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1262	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
518	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1263	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
519	downheap ((WT *)periodics, periodiccnt, 0);	1264	downheap ((WT *)periodics, periodiccnt, 0);
520	}	1265	}
521	else	1266	else
522	evperiodic_stop (w); /* nonrepeating: stop timer */	1267	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
523		1268
524	event ((W)w, EV_TIMEOUT);	1269	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
525	}	1270	}
526	}	1271	}
527		1272
528	static void	1273	static void noinline
529	periodics_reschedule (ev_tstamp diff)	1274	periodics_reschedule (EV_P)
530	{	1275	{
531	int i;	1276	int i;
532		1277
533	/* adjust periodics after time jump */	1278	/* adjust periodics after time jump */
534	for (i = 0; i < periodiccnt; ++i)	1279	for (i = 0; i < periodiccnt; ++i)
535	{	1280	{
536	struct ev_periodic *w = periodics [i];	1281	ev_periodic *w = periodics [i];
537		1282
		1283	if (w->reschedule_cb)
		1284	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
538	if (w->interval)	1285	else if (w->interval)
		1286	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1287	}
		1288
		1289	/* now rebuild the heap */
		1290	for (i = periodiccnt >> 1; i--; )
		1291	downheap ((WT *)periodics, periodiccnt, i);
		1292	}
		1293	#endif
		1294
		1295	#if EV_IDLE_ENABLE
		1296	void inline_size
		1297	idle_reify (EV_P)
		1298	{
		1299	if (expect_false (idleall))
		1300	{
		1301	int pri;
		1302
		1303	for (pri = NUMPRI; pri--; )
539	{	1304	{
540	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1305	if (pendingcnt [pri])
		1306	break;
541		1307
542	if (fabs (diff) >= 1e-4)	1308	if (idlecnt [pri])
543	{	1309	{
544	evperiodic_stop (w);	1310	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
545	evperiodic_start (w);	1311	break;
546
547	i = 0; /* restart loop, inefficient, but time jumps should be rare */
548	}	1312	}
549	}	1313	}
550	}	1314	}
551	}	1315	}
		1316	#endif
552		1317
553	static void	1318	void inline_speed
554	time_update ()	1319	time_update (EV_P_ ev_tstamp max_block)
555	{	1320	{
556	int i;	1321	int i;
557		1322
558	ev_now = ev_time ();	1323	#if EV_USE_MONOTONIC
559
560	if (have_monotonic)	1324	if (expect_true (have_monotonic))
561	{	1325	{
562	ev_tstamp odiff = diff;	1326	ev_tstamp odiff = rtmn_diff;
563		1327
564	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1328	mn_now = get_clock ();
		1329
		1330	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1331	/* interpolate in the meantime */
		1332	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
565	{	1333	{
566	now = get_clock ();	1334	ev_rt_now = rtmn_diff + mn_now;
		1335	return;
		1336	}
		1337
		1338	now_floor = mn_now;
		1339	ev_rt_now = ev_time ();
		1340
		1341	/* loop a few times, before making important decisions.
		1342	* on the choice of "4": one iteration isn't enough,
		1343	* in case we get preempted during the calls to
		1344	* ev_time and get_clock. a second call is almost guaranteed
		1345	* to succeed in that case, though. and looping a few more times
		1346	* doesn't hurt either as we only do this on time-jumps or
		1347	* in the unlikely event of having been preempted here.
		1348	*/
		1349	for (i = 4; --i; )
		1350	{
567	diff = ev_now - now;	1351	rtmn_diff = ev_rt_now - mn_now;
568		1352
569	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1353	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
570	return; /* all is well */	1354	return; /* all is well */
571		1355
572	ev_now = ev_time ();	1356	ev_rt_now = ev_time ();
		1357	mn_now = get_clock ();
		1358	now_floor = mn_now;
573	}	1359	}
574		1360
		1361	# if EV_PERIODIC_ENABLE
575	periodics_reschedule (diff - odiff);	1362	periodics_reschedule (EV_A);
		1363	# endif
576	/* no timer adjustment, as the monotonic clock doesn't jump */	1364	/* no timer adjustment, as the monotonic clock doesn't jump */
		1365	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
577	}	1366	}
578	else	1367	else
		1368	#endif
579	{	1369	{
580	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1370	ev_rt_now = ev_time ();
		1371
		1372	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
581	{	1373	{
		1374	#if EV_PERIODIC_ENABLE
582	periodics_reschedule (ev_now - now);	1375	periodics_reschedule (EV_A);
583		1376	#endif
584	/* adjust timers. this is easy, as the offset is the same for all */	1377	/* adjust timers. this is easy, as the offset is the same for all of them */
585	for (i = 0; i < timercnt; ++i)	1378	for (i = 0; i < timercnt; ++i)
586	timers [i]->at += diff;	1379	((WT)timers [i])->at += ev_rt_now - mn_now;
587	}	1380	}
588		1381
589	now = ev_now;	1382	mn_now = ev_rt_now;
590	}	1383	}
591	}	1384	}
592		1385
593	int ev_loop_done;	1386	void
		1387	ev_ref (EV_P)
		1388	{
		1389	++activecnt;
		1390	}
594		1391
		1392	void
		1393	ev_unref (EV_P)
		1394	{
		1395	--activecnt;
		1396	}
		1397
		1398	static int loop_done;
		1399
		1400	void
595	void ev_loop (int flags)	1401	ev_loop (EV_P_ int flags)
596	{	1402	{
597	double block;	1403	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
598	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1404	? EVUNLOOP_ONE
		1405	: EVUNLOOP_CANCEL;
		1406
		1407	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
599		1408
600	do	1409	do
601	{	1410	{
		1411	#ifndef _WIN32
		1412	if (expect_false (curpid)) /* penalise the forking check even more */
		1413	if (expect_false (getpid () != curpid))
		1414	{
		1415	curpid = getpid ();
		1416	postfork = 1;
		1417	}
		1418	#endif
		1419
		1420	#if EV_FORK_ENABLE
		1421	/* we might have forked, so queue fork handlers */
		1422	if (expect_false (postfork))
		1423	if (forkcnt)
		1424	{
		1425	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1426	call_pending (EV_A);
		1427	}
		1428	#endif
		1429
602	/* queue check watchers (and execute them) */	1430	/* queue prepare watchers (and execute them) */
603	if (preparecnt)	1431	if (expect_false (preparecnt))
604	{	1432	{
605	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1433	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
606	call_pending ();	1434	call_pending (EV_A);
607	}	1435	}
608		1436
		1437	if (expect_false (!activecnt))
		1438	break;
		1439
		1440	/* we might have forked, so reify kernel state if necessary */
		1441	if (expect_false (postfork))
		1442	loop_fork (EV_A);
		1443
609	/* update fd-related kernel structures */	1444	/* update fd-related kernel structures */
610	fd_reify ();	1445	fd_reify (EV_A);
611		1446
612	/* calculate blocking time */	1447	/* calculate blocking time */
		1448	{
		1449	ev_tstamp block;
613		1450
614	/* we only need this for !monotonic clockor timers, but as we basically	1451	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
615	always have timers, we just calculate it always */	1452	block = 0.; /* do not block at all */
616	ev_now = ev_time ();
617
618	if (flags & EVLOOP_NONBLOCK || idlecnt)
619	block = 0.;
620	else	1453	else
621	{	1454	{
		1455	/* update time to cancel out callback processing overhead */
		1456	time_update (EV_A_ 1e100);
		1457
622	block = MAX_BLOCKTIME;	1458	block = MAX_BLOCKTIME;
623		1459
624	if (timercnt)	1460	if (timercnt)
625	{	1461	{
626	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1462	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
627	if (block > to) block = to;	1463	if (block > to) block = to;
628	}	1464	}
629		1465
		1466	#if EV_PERIODIC_ENABLE
630	if (periodiccnt)	1467	if (periodiccnt)
631	{	1468	{
632	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1469	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
633	if (block > to) block = to;	1470	if (block > to) block = to;
634	}	1471	}
		1472	#endif
635		1473
636	if (block < 0.) block = 0.;	1474	if (expect_false (block < 0.)) block = 0.;
637	}	1475	}
638		1476
639	method_poll (block);	1477	++loop_count;
		1478	backend_poll (EV_A_ block);
640		1479
641	/* update ev_now, do magic */	1480	/* update ev_rt_now, do magic */
642	time_update ();	1481	time_update (EV_A_ block);
		1482	}
643		1483
644	/* queue pending timers and reschedule them */	1484	/* queue pending timers and reschedule them */
645	timers_reify (); /* relative timers called last */	1485	timers_reify (EV_A); /* relative timers called last */
		1486	#if EV_PERIODIC_ENABLE
646	periodics_reify (); /* absolute timers called first */	1487	periodics_reify (EV_A); /* absolute timers called first */
		1488	#endif
647		1489
		1490	#if EV_IDLE_ENABLE
648	/* queue idle watchers unless io or timers are pending */	1491	/* queue idle watchers unless other events are pending */
649	if (!pendingcnt)	1492	idle_reify (EV_A);
650	queue_events ((W *)idles, idlecnt, EV_IDLE);	1493	#endif
651		1494
652	/* queue check watchers, to be executed first */	1495	/* queue check watchers, to be executed first */
653	if (checkcnt)	1496	if (expect_false (checkcnt))
654	queue_events ((W *)checks, checkcnt, EV_CHECK);	1497	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
655		1498
656	call_pending ();	1499	call_pending (EV_A);
657	}
658	while (!ev_loop_done);
659		1500
660	if (ev_loop_done != 2)	1501	}
		1502	while (expect_true (activecnt && !loop_done));
		1503
		1504	if (loop_done == EVUNLOOP_ONE)
		1505	loop_done = EVUNLOOP_CANCEL;
		1506	}
		1507
		1508	void
		1509	ev_unloop (EV_P_ int how)
		1510	{
661	ev_loop_done = 0;	1511	loop_done = how;
662	}	1512	}
663		1513
664	/*****************************************************************************/	1514	/*****************************************************************************/
665		1515
666	static void	1516	void inline_size
667	wlist_add (WL *head, WL elem)	1517	wlist_add (WL *head, WL elem)
668	{	1518	{
669	elem->next = *head;	1519	elem->next = *head;
670	*head = elem;	1520	*head = elem;
671	}	1521	}
672		1522
673	static void	1523	void inline_size
674	wlist_del (WL *head, WL elem)	1524	wlist_del (WL *head, WL elem)
675	{	1525	{
676	while (*head)	1526	while (*head)
677	{	1527	{
678	if (*head == elem)	1528	if (*head == elem)
…		…
683		1533
684	head = &(*head)->next;	1534	head = &(*head)->next;
685	}	1535	}
686	}	1536	}
687		1537
688	static void	1538	void inline_speed
689	ev_clear (W w)	1539	clear_pending (EV_P_ W w)
690	{	1540	{
691	if (w->pending)	1541	if (w->pending)
692	{	1542	{
693	pendings [w->pending - 1].w = 0;	1543	pendings [ABSPRI (w)][w->pending - 1].w = 0;
694	w->pending = 0;	1544	w->pending = 0;
695	}	1545	}
696	}	1546	}
697		1547
698	static void	1548	int
		1549	ev_clear_pending (EV_P_ void *w)
		1550	{
		1551	W w_ = (W)w;
		1552	int pending = w_->pending;
		1553
		1554	if (expect_true (pending))
		1555	{
		1556	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1557	w_->pending = 0;
		1558	p->w = 0;
		1559	return p->events;
		1560	}
		1561	else
		1562	return 0;
		1563	}
		1564
		1565	void inline_size
		1566	pri_adjust (EV_P_ W w)
		1567	{
		1568	int pri = w->priority;
		1569	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1570	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1571	w->priority = pri;
		1572	}
		1573
		1574	void inline_speed
699	ev_start (W w, int active)	1575	ev_start (EV_P_ W w, int active)
700	{	1576	{
		1577	pri_adjust (EV_A_ w);
701	w->active = active;	1578	w->active = active;
		1579	ev_ref (EV_A);
702	}	1580	}
703		1581
704	static void	1582	void inline_size
705	ev_stop (W w)	1583	ev_stop (EV_P_ W w)
706	{	1584	{
		1585	ev_unref (EV_A);
707	w->active = 0;	1586	w->active = 0;
708	}	1587	}
709		1588
710	/*****************************************************************************/	1589	/*****************************************************************************/
711		1590
712	void	1591	void noinline
713	evio_start (struct ev_io *w)	1592	ev_io_start (EV_P_ ev_io *w)
714	{	1593	{
715	if (ev_is_active (w))
716	return;
717
718	int fd = w->fd;	1594	int fd = w->fd;
719		1595
		1596	if (expect_false (ev_is_active (w)))
		1597	return;
		1598
		1599	assert (("ev_io_start called with negative fd", fd >= 0));
		1600
720	ev_start ((W)w, 1);	1601	ev_start (EV_A_ (W)w, 1);
721	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1602	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
722	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1603	wlist_add ((WL *)&anfds[fd].head, (WL)w);
723		1604
724	++fdchangecnt;	1605	fd_change (EV_A_ fd);
725	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
726	fdchanges [fdchangecnt - 1] = fd;
727	}	1606	}
728		1607
729	void	1608	void noinline
730	evio_stop (struct ev_io *w)	1609	ev_io_stop (EV_P_ ev_io *w)
731	{	1610	{
732	ev_clear ((W)w);	1611	clear_pending (EV_A_ (W)w);
733	if (!ev_is_active (w))	1612	if (expect_false (!ev_is_active (w)))
734	return;	1613	return;
		1614
		1615	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
735		1616
736	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1617	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
737	ev_stop ((W)w);	1618	ev_stop (EV_A_ (W)w);
738		1619
739	++fdchangecnt;	1620	fd_change (EV_A_ w->fd);
740	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
741	fdchanges [fdchangecnt - 1] = w->fd;
742	}	1621	}
743		1622
744	void	1623	void noinline
745	evtimer_start (struct ev_timer *w)	1624	ev_timer_start (EV_P_ ev_timer *w)
746	{	1625	{
747	if (ev_is_active (w))	1626	if (expect_false (ev_is_active (w)))
748	return;	1627	return;
749		1628
750	w->at += now;	1629	((WT)w)->at += mn_now;
751		1630
752	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1631	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
753		1632
754	ev_start ((W)w, ++timercnt);	1633	ev_start (EV_A_ (W)w, ++timercnt);
755	array_needsize (timers, timermax, timercnt, );	1634	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
756	timers [timercnt - 1] = w;	1635	timers [timercnt - 1] = w;
757	upheap ((WT *)timers, timercnt - 1);	1636	upheap ((WT *)timers, timercnt - 1);
758	}
759		1637
760	void	1638	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1639	}
		1640
		1641	void noinline
761	evtimer_stop (struct ev_timer *w)	1642	ev_timer_stop (EV_P_ ev_timer *w)
762	{	1643	{
763	ev_clear ((W)w);	1644	clear_pending (EV_A_ (W)w);
764	if (!ev_is_active (w))	1645	if (expect_false (!ev_is_active (w)))
765	return;	1646	return;
766		1647
767	if (w->active < timercnt--)	1648	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1649
		1650	{
		1651	int active = ((W)w)->active;
		1652
		1653	if (expect_true (--active < --timercnt))
768	{	1654	{
769	timers [w->active - 1] = timers [timercnt];	1655	timers [active] = timers [timercnt];
770	downheap ((WT *)timers, timercnt, w->active - 1);	1656	adjustheap ((WT *)timers, timercnt, active);
771	}	1657	}
		1658	}
772		1659
773	w->at = w->repeat;	1660	((WT)w)->at -= mn_now;
774		1661
775	ev_stop ((W)w);	1662	ev_stop (EV_A_ (W)w);
776	}	1663	}
777		1664
778	void	1665	void noinline
779	evtimer_again (struct ev_timer *w)	1666	ev_timer_again (EV_P_ ev_timer *w)
780	{	1667	{
781	if (ev_is_active (w))	1668	if (ev_is_active (w))
782	{	1669	{
783	if (w->repeat)	1670	if (w->repeat)
784	{	1671	{
785	w->at = now + w->repeat;	1672	((WT)w)->at = mn_now + w->repeat;
786	downheap ((WT *)timers, timercnt, w->active - 1);	1673	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
787	}	1674	}
788	else	1675	else
789	evtimer_stop (w);	1676	ev_timer_stop (EV_A_ w);
790	}	1677	}
791	else if (w->repeat)	1678	else if (w->repeat)
		1679	{
		1680	w->at = w->repeat;
792	evtimer_start (w);	1681	ev_timer_start (EV_A_ w);
		1682	}
793	}	1683	}
794		1684
795	void	1685	#if EV_PERIODIC_ENABLE
		1686	void noinline
796	evperiodic_start (struct ev_periodic *w)	1687	ev_periodic_start (EV_P_ ev_periodic *w)
797	{	1688	{
798	if (ev_is_active (w))	1689	if (expect_false (ev_is_active (w)))
799	return;	1690	return;
800		1691
801	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1692	if (w->reschedule_cb)
802		1693	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1694	else if (w->interval)
		1695	{
		1696	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
803	/* this formula differs from the one in periodic_reify because we do not always round up */	1697	/* this formula differs from the one in periodic_reify because we do not always round up */
804	if (w->interval)
805	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1698	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1699	}
		1700	else
		1701	((WT)w)->at = w->offset;
806		1702
807	ev_start ((W)w, ++periodiccnt);	1703	ev_start (EV_A_ (W)w, ++periodiccnt);
808	array_needsize (periodics, periodicmax, periodiccnt, );	1704	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
809	periodics [periodiccnt - 1] = w;	1705	periodics [periodiccnt - 1] = w;
810	upheap ((WT *)periodics, periodiccnt - 1);	1706	upheap ((WT *)periodics, periodiccnt - 1);
811	}
812		1707
813	void	1708	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1709	}
		1710
		1711	void noinline
814	evperiodic_stop (struct ev_periodic *w)	1712	ev_periodic_stop (EV_P_ ev_periodic *w)
815	{	1713	{
816	ev_clear ((W)w);	1714	clear_pending (EV_A_ (W)w);
817	if (!ev_is_active (w))	1715	if (expect_false (!ev_is_active (w)))
818	return;	1716	return;
819		1717
820	if (w->active < periodiccnt--)	1718	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1719
		1720	{
		1721	int active = ((W)w)->active;
		1722
		1723	if (expect_true (--active < --periodiccnt))
821	{	1724	{
822	periodics [w->active - 1] = periodics [periodiccnt];	1725	periodics [active] = periodics [periodiccnt];
823	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1726	adjustheap ((WT *)periodics, periodiccnt, active);
824	}	1727	}
		1728	}
825		1729
826	ev_stop ((W)w);	1730	ev_stop (EV_A_ (W)w);
827	}	1731	}
828		1732
829	void	1733	void noinline
		1734	ev_periodic_again (EV_P_ ev_periodic *w)
		1735	{
		1736	/* TODO: use adjustheap and recalculation */
		1737	ev_periodic_stop (EV_A_ w);
		1738	ev_periodic_start (EV_A_ w);
		1739	}
		1740	#endif
		1741
		1742	#ifndef SA_RESTART
		1743	# define SA_RESTART 0
		1744	#endif
		1745
		1746	void noinline
830	evsignal_start (struct ev_signal *w)	1747	ev_signal_start (EV_P_ ev_signal *w)
831	{	1748	{
		1749	#if EV_MULTIPLICITY
		1750	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1751	#endif
832	if (ev_is_active (w))	1752	if (expect_false (ev_is_active (w)))
833	return;	1753	return;
834		1754
835	ev_start ((W)w, 1);	1755	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1756
		1757	{
		1758	#ifndef _WIN32
		1759	sigset_t full, prev;
		1760	sigfillset (&full);
		1761	sigprocmask (SIG_SETMASK, &full, &prev);
		1762	#endif
		1763
836	array_needsize (signals, signalmax, w->signum, signals_init);	1764	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1765
		1766	#ifndef _WIN32
		1767	sigprocmask (SIG_SETMASK, &prev, 0);
		1768	#endif
		1769	}
		1770
		1771	ev_start (EV_A_ (W)w, 1);
837	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1772	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
838		1773
839	if (!w->next)	1774	if (!((WL)w)->next)
840	{	1775	{
		1776	#if _WIN32
		1777	signal (w->signum, sighandler);
		1778	#else
841	struct sigaction sa;	1779	struct sigaction sa;
842	sa.sa_handler = sighandler;	1780	sa.sa_handler = sighandler;
843	sigfillset (&sa.sa_mask);	1781	sigfillset (&sa.sa_mask);
844	sa.sa_flags = 0;	1782	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
845	sigaction (w->signum, &sa, 0);	1783	sigaction (w->signum, &sa, 0);
		1784	#endif
846	}	1785	}
847	}	1786	}
848		1787
849	void	1788	void noinline
850	evsignal_stop (struct ev_signal *w)	1789	ev_signal_stop (EV_P_ ev_signal *w)
851	{	1790	{
852	ev_clear ((W)w);	1791	clear_pending (EV_A_ (W)w);
853	if (!ev_is_active (w))	1792	if (expect_false (!ev_is_active (w)))
854	return;	1793	return;
855		1794
856	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1795	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
857	ev_stop ((W)w);	1796	ev_stop (EV_A_ (W)w);
858		1797
859	if (!signals [w->signum - 1].head)	1798	if (!signals [w->signum - 1].head)
860	signal (w->signum, SIG_DFL);	1799	signal (w->signum, SIG_DFL);
861	}	1800	}
862		1801
863	void evidle_start (struct ev_idle *w)	1802	void
		1803	ev_child_start (EV_P_ ev_child *w)
864	{	1804	{
		1805	#if EV_MULTIPLICITY
		1806	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1807	#endif
865	if (ev_is_active (w))	1808	if (expect_false (ev_is_active (w)))
866	return;	1809	return;
867		1810
868	ev_start ((W)w, ++idlecnt);	1811	ev_start (EV_A_ (W)w, 1);
869	array_needsize (idles, idlemax, idlecnt, );	1812	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
870	idles [idlecnt - 1] = w;
871	}	1813	}
872		1814
873	void evidle_stop (struct ev_idle *w)	1815	void
		1816	ev_child_stop (EV_P_ ev_child *w)
874	{	1817	{
875	ev_clear ((W)w);	1818	clear_pending (EV_A_ (W)w);
876	if (ev_is_active (w))	1819	if (expect_false (!ev_is_active (w)))
877	return;	1820	return;
878		1821
879	idles [w->active - 1] = idles [--idlecnt];	1822	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
880	ev_stop ((W)w);	1823	ev_stop (EV_A_ (W)w);
881	}	1824	}
882		1825
		1826	#if EV_STAT_ENABLE
		1827
		1828	# ifdef _WIN32
		1829	# undef lstat
		1830	# define lstat(a,b) _stati64 (a,b)
		1831	# endif
		1832
		1833	#define DEF_STAT_INTERVAL 5.0074891
		1834	#define MIN_STAT_INTERVAL 0.1074891
		1835
		1836	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1837
		1838	#if EV_USE_INOTIFY
		1839	# define EV_INOTIFY_BUFSIZE 8192
		1840
		1841	static void noinline
		1842	infy_add (EV_P_ ev_stat *w)
		1843	{
		1844	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);
		1845
		1846	if (w->wd < 0)
		1847	{
		1848	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1849
		1850	/* monitor some parent directory for speedup hints */
		1851	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1852	{
		1853	char path [4096];
		1854	strcpy (path, w->path);
		1855
		1856	do
		1857	{
		1858	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1859	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1860
		1861	char *pend = strrchr (path, '/');
		1862
		1863	if (!pend)
		1864	break; /* whoops, no '/', complain to your admin */
		1865
		1866	*pend = 0;
		1867	w->wd = inotify_add_watch (fs_fd, path, mask);
		1868	}
		1869	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1870	}
		1871	}
		1872	else
		1873	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1874
		1875	if (w->wd >= 0)
		1876	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1877	}
		1878
		1879	static void noinline
		1880	infy_del (EV_P_ ev_stat *w)
		1881	{
		1882	int slot;
		1883	int wd = w->wd;
		1884
		1885	if (wd < 0)
		1886	return;
		1887
		1888	w->wd = -2;
		1889	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1890	wlist_del (&fs_hash [slot].head, (WL)w);
		1891
		1892	/* remove this watcher, if others are watching it, they will rearm */
		1893	inotify_rm_watch (fs_fd, wd);
		1894	}
		1895
		1896	static void noinline
		1897	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1898	{
		1899	if (slot < 0)
		1900	/* overflow, need to check for all hahs slots */
		1901	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1902	infy_wd (EV_A_ slot, wd, ev);
		1903	else
		1904	{
		1905	WL w_;
		1906
		1907	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1908	{
		1909	ev_stat *w = (ev_stat *)w_;
		1910	w_ = w_->next; /* lets us remove this watcher and all before it */
		1911
		1912	if (w->wd == wd || wd == -1)
		1913	{
		1914	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1915	{
		1916	w->wd = -1;
		1917	infy_add (EV_A_ w); /* re-add, no matter what */
		1918	}
		1919
		1920	stat_timer_cb (EV_A_ &w->timer, 0);
		1921	}
		1922	}
		1923	}
		1924	}
		1925
		1926	static void
		1927	infy_cb (EV_P_ ev_io *w, int revents)
		1928	{
		1929	char buf [EV_INOTIFY_BUFSIZE];
		1930	struct inotify_event *ev = (struct inotify_event *)buf;
		1931	int ofs;
		1932	int len = read (fs_fd, buf, sizeof (buf));
		1933
		1934	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1935	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1936	}
		1937
		1938	void inline_size
		1939	infy_init (EV_P)
		1940	{
		1941	if (fs_fd != -2)
		1942	return;
		1943
		1944	fs_fd = inotify_init ();
		1945
		1946	if (fs_fd >= 0)
		1947	{
		1948	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1949	ev_set_priority (&fs_w, EV_MAXPRI);
		1950	ev_io_start (EV_A_ &fs_w);
		1951	}
		1952	}
		1953
		1954	void inline_size
		1955	infy_fork (EV_P)
		1956	{
		1957	int slot;
		1958
		1959	if (fs_fd < 0)
		1960	return;
		1961
		1962	close (fs_fd);
		1963	fs_fd = inotify_init ();
		1964
		1965	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1966	{
		1967	WL w_ = fs_hash [slot].head;
		1968	fs_hash [slot].head = 0;
		1969
		1970	while (w_)
		1971	{
		1972	ev_stat *w = (ev_stat *)w_;
		1973	w_ = w_->next; /* lets us add this watcher */
		1974
		1975	w->wd = -1;
		1976
		1977	if (fs_fd >= 0)
		1978	infy_add (EV_A_ w); /* re-add, no matter what */
		1979	else
		1980	ev_timer_start (EV_A_ &w->timer);
		1981	}
		1982
		1983	}
		1984	}
		1985
		1986	#endif
		1987
		1988	void
		1989	ev_stat_stat (EV_P_ ev_stat *w)
		1990	{
		1991	if (lstat (w->path, &w->attr) < 0)
		1992	w->attr.st_nlink = 0;
		1993	else if (!w->attr.st_nlink)
		1994	w->attr.st_nlink = 1;
		1995	}
		1996
		1997	static void noinline
		1998	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1999	{
		2000	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2001
		2002	/* we copy this here each the time so that */
		2003	/* prev has the old value when the callback gets invoked */
		2004	w->prev = w->attr;
		2005	ev_stat_stat (EV_A_ w);
		2006
		2007	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2008	if (
		2009	w->prev.st_dev != w->attr.st_dev
		2010	|| w->prev.st_ino != w->attr.st_ino
		2011	|| w->prev.st_mode != w->attr.st_mode
		2012	|| w->prev.st_nlink != w->attr.st_nlink
		2013	|| w->prev.st_uid != w->attr.st_uid
		2014	|| w->prev.st_gid != w->attr.st_gid
		2015	|| w->prev.st_rdev != w->attr.st_rdev
		2016	|| w->prev.st_size != w->attr.st_size
		2017	|| w->prev.st_atime != w->attr.st_atime
		2018	|| w->prev.st_mtime != w->attr.st_mtime
		2019	|| w->prev.st_ctime != w->attr.st_ctime
		2020	) {
		2021	#if EV_USE_INOTIFY
		2022	infy_del (EV_A_ w);
		2023	infy_add (EV_A_ w);
		2024	ev_stat_stat (EV_A_ w); /* avoid race... */
		2025	#endif
		2026
		2027	ev_feed_event (EV_A_ w, EV_STAT);
		2028	}
		2029	}
		2030
		2031	void
		2032	ev_stat_start (EV_P_ ev_stat *w)
		2033	{
		2034	if (expect_false (ev_is_active (w)))
		2035	return;
		2036
		2037	/* since we use memcmp, we need to clear any padding data etc. */
		2038	memset (&w->prev, 0, sizeof (ev_statdata));
		2039	memset (&w->attr, 0, sizeof (ev_statdata));
		2040
		2041	ev_stat_stat (EV_A_ w);
		2042
		2043	if (w->interval < MIN_STAT_INTERVAL)
		2044	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2045
		2046	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2047	ev_set_priority (&w->timer, ev_priority (w));
		2048
		2049	#if EV_USE_INOTIFY
		2050	infy_init (EV_A);
		2051
		2052	if (fs_fd >= 0)
		2053	infy_add (EV_A_ w);
		2054	else
		2055	#endif
		2056	ev_timer_start (EV_A_ &w->timer);
		2057
		2058	ev_start (EV_A_ (W)w, 1);
		2059	}
		2060
		2061	void
		2062	ev_stat_stop (EV_P_ ev_stat *w)
		2063	{
		2064	clear_pending (EV_A_ (W)w);
		2065	if (expect_false (!ev_is_active (w)))
		2066	return;
		2067
		2068	#if EV_USE_INOTIFY
		2069	infy_del (EV_A_ w);
		2070	#endif
		2071	ev_timer_stop (EV_A_ &w->timer);
		2072
		2073	ev_stop (EV_A_ (W)w);
		2074	}
		2075	#endif
		2076
		2077	#if EV_IDLE_ENABLE
		2078	void
		2079	ev_idle_start (EV_P_ ev_idle *w)
		2080	{
		2081	if (expect_false (ev_is_active (w)))
		2082	return;
		2083
		2084	pri_adjust (EV_A_ (W)w);
		2085
		2086	{
		2087	int active = ++idlecnt [ABSPRI (w)];
		2088
		2089	++idleall;
		2090	ev_start (EV_A_ (W)w, active);
		2091
		2092	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2093	idles [ABSPRI (w)][active - 1] = w;
		2094	}
		2095	}
		2096
		2097	void
		2098	ev_idle_stop (EV_P_ ev_idle *w)
		2099	{
		2100	clear_pending (EV_A_ (W)w);
		2101	if (expect_false (!ev_is_active (w)))
		2102	return;
		2103
		2104	{
		2105	int active = ((W)w)->active;
		2106
		2107	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2108	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2109
		2110	ev_stop (EV_A_ (W)w);
		2111	--idleall;
		2112	}
		2113	}
		2114	#endif
		2115
		2116	void
883	void evprepare_start (struct ev_prepare *w)	2117	ev_prepare_start (EV_P_ ev_prepare *w)
884	{	2118	{
885	if (ev_is_active (w))	2119	if (expect_false (ev_is_active (w)))
886	return;	2120	return;
887		2121
888	ev_start ((W)w, ++preparecnt);	2122	ev_start (EV_A_ (W)w, ++preparecnt);
889	array_needsize (prepares, preparemax, preparecnt, );	2123	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
890	prepares [preparecnt - 1] = w;	2124	prepares [preparecnt - 1] = w;
891	}	2125	}
892		2126
		2127	void
893	void evprepare_stop (struct ev_prepare *w)	2128	ev_prepare_stop (EV_P_ ev_prepare *w)
894	{	2129	{
895	ev_clear ((W)w);	2130	clear_pending (EV_A_ (W)w);
896	if (ev_is_active (w))	2131	if (expect_false (!ev_is_active (w)))
897	return;	2132	return;
898		2133
		2134	{
		2135	int active = ((W)w)->active;
899	prepares [w->active - 1] = prepares [--preparecnt];	2136	prepares [active - 1] = prepares [--preparecnt];
		2137	((W)prepares [active - 1])->active = active;
		2138	}
		2139
900	ev_stop ((W)w);	2140	ev_stop (EV_A_ (W)w);
901	}	2141	}
902		2142
		2143	void
903	void evcheck_start (struct ev_check *w)	2144	ev_check_start (EV_P_ ev_check *w)
904	{	2145	{
905	if (ev_is_active (w))	2146	if (expect_false (ev_is_active (w)))
906	return;	2147	return;
907		2148
908	ev_start ((W)w, ++checkcnt);	2149	ev_start (EV_A_ (W)w, ++checkcnt);
909	array_needsize (checks, checkmax, checkcnt, );	2150	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
910	checks [checkcnt - 1] = w;	2151	checks [checkcnt - 1] = w;
911	}	2152	}
912		2153
		2154	void
913	void evcheck_stop (struct ev_check *w)	2155	ev_check_stop (EV_P_ ev_check *w)
914	{	2156	{
915	ev_clear ((W)w);	2157	clear_pending (EV_A_ (W)w);
916	if (ev_is_active (w))	2158	if (expect_false (!ev_is_active (w)))
917	return;	2159	return;
918		2160
		2161	{
		2162	int active = ((W)w)->active;
919	checks [w->active - 1] = checks [--checkcnt];	2163	checks [active - 1] = checks [--checkcnt];
		2164	((W)checks [active - 1])->active = active;
		2165	}
		2166
920	ev_stop ((W)w);	2167	ev_stop (EV_A_ (W)w);
921	}	2168	}
922		2169
923	void evchild_start (struct ev_child *w)	2170	#if EV_EMBED_ENABLE
		2171	void noinline
		2172	ev_embed_sweep (EV_P_ ev_embed *w)
924	{	2173	{
		2174	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2175	}
		2176
		2177	static void
		2178	embed_cb (EV_P_ ev_io *io, int revents)
		2179	{
		2180	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2181
925	if (ev_is_active (w))	2182	if (ev_cb (w))
926	return;	2183	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2184	else
		2185	ev_embed_sweep (loop, w);
		2186	}
927		2187
		2188	void
		2189	ev_embed_start (EV_P_ ev_embed *w)
		2190	{
		2191	if (expect_false (ev_is_active (w)))
		2192	return;
		2193
		2194	{
		2195	struct ev_loop *loop = w->loop;
		2196	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2197	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2198	}
		2199
		2200	ev_set_priority (&w->io, ev_priority (w));
		2201	ev_io_start (EV_A_ &w->io);
		2202
928	ev_start ((W)w, 1);	2203	ev_start (EV_A_ (W)w, 1);
929	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	}	2204	}
931		2205
932	void evchild_stop (struct ev_child *w)	2206	void
		2207	ev_embed_stop (EV_P_ ev_embed *w)
933	{	2208	{
934	ev_clear ((W)w);	2209	clear_pending (EV_A_ (W)w);
935	if (ev_is_active (w))	2210	if (expect_false (!ev_is_active (w)))
936	return;	2211	return;
937		2212
938	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2213	ev_io_stop (EV_A_ &w->io);
		2214
939	ev_stop ((W)w);	2215	ev_stop (EV_A_ (W)w);
940	}	2216	}
		2217	#endif
		2218
		2219	#if EV_FORK_ENABLE
		2220	void
		2221	ev_fork_start (EV_P_ ev_fork *w)
		2222	{
		2223	if (expect_false (ev_is_active (w)))
		2224	return;
		2225
		2226	ev_start (EV_A_ (W)w, ++forkcnt);
		2227	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2228	forks [forkcnt - 1] = w;
		2229	}
		2230
		2231	void
		2232	ev_fork_stop (EV_P_ ev_fork *w)
		2233	{
		2234	clear_pending (EV_A_ (W)w);
		2235	if (expect_false (!ev_is_active (w)))
		2236	return;
		2237
		2238	{
		2239	int active = ((W)w)->active;
		2240	forks [active - 1] = forks [--forkcnt];
		2241	((W)forks [active - 1])->active = active;
		2242	}
		2243
		2244	ev_stop (EV_A_ (W)w);
		2245	}
		2246	#endif
941		2247
942	/*****************************************************************************/	2248	/*****************************************************************************/
943		2249
944	struct ev_once	2250	struct ev_once
945	{	2251	{
946	struct ev_io io;	2252	ev_io io;
947	struct ev_timer to;	2253	ev_timer to;
948	void (*cb)(int revents, void *arg);	2254	void (*cb)(int revents, void *arg);
949	void *arg;	2255	void *arg;
950	};	2256	};
951		2257
952	static void	2258	static void
953	once_cb (struct ev_once *once, int revents)	2259	once_cb (EV_P_ struct ev_once *once, int revents)
954	{	2260	{
955	void (*cb)(int revents, void *arg) = once->cb;	2261	void (*cb)(int revents, void *arg) = once->cb;
956	void *arg = once->arg;	2262	void *arg = once->arg;
957		2263
958	evio_stop (&once->io);	2264	ev_io_stop (EV_A_ &once->io);
959	evtimer_stop (&once->to);	2265	ev_timer_stop (EV_A_ &once->to);
960	free (once);	2266	ev_free (once);
961		2267
962	cb (revents, arg);	2268	cb (revents, arg);
963	}	2269	}
964		2270
965	static void	2271	static void
966	once_cb_io (struct ev_io *w, int revents)	2272	once_cb_io (EV_P_ ev_io *w, int revents)
967	{	2273	{
968	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2274	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
969	}	2275	}
970		2276
971	static void	2277	static void
972	once_cb_to (struct ev_timer *w, int revents)	2278	once_cb_to (EV_P_ ev_timer *w, int revents)
973	{	2279	{
974	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2280	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
975	}	2281	}
976		2282
977	void	2283	void
978	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2284	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
979	{	2285	{
980	struct ev_once *once = malloc (sizeof (struct ev_once));	2286	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
981		2287
982	if (!once)	2288	if (expect_false (!once))
983	cb (EV_ERROR, arg);	2289	{
984	else	2290	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		2291	return;
985	{	2292	}
		2293
986	once->cb = cb;	2294	once->cb = cb;
987	once->arg = arg;	2295	once->arg = arg;
988		2296
989	evw_init (&once->io, once_cb_io);	2297	ev_init (&once->io, once_cb_io);
990
991	if (fd >= 0)	2298	if (fd >= 0)
992	{	2299	{
993	evio_set (&once->io, fd, events);	2300	ev_io_set (&once->io, fd, events);
994	evio_start (&once->io);	2301	ev_io_start (EV_A_ &once->io);
995	}	2302	}
996		2303
997	evw_init (&once->to, once_cb_to);	2304	ev_init (&once->to, once_cb_to);
998
999	if (timeout >= 0.)	2305	if (timeout >= 0.)
1000	{	2306	{
1001	evtimer_set (&once->to, timeout, 0.);	2307	ev_timer_set (&once->to, timeout, 0.);
1002	evtimer_start (&once->to);	2308	ev_timer_start (EV_A_ &once->to);
1003	}
1004	}
1005	}
1006
1007	/*****************************************************************************/
1008
1009	#if 0
1010
1011	struct ev_io wio;
1012
1013	static void
1014	sin_cb (struct ev_io *w, int revents)
1015	{
1016	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1017	}
1018
1019	static void
1020	ocb (struct ev_timer *w, int revents)
1021	{
1022	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1023	evtimer_stop (w);
1024	evtimer_start (w);
1025	}
1026
1027	static void
1028	scb (struct ev_signal *w, int revents)
1029	{
1030	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1031	evio_stop (&wio);
1032	evio_start (&wio);
1033	}
1034
1035	static void
1036	gcb (struct ev_signal *w, int revents)
1037	{
1038	fprintf (stderr, "generic %x\n", revents);
1039
1040	}
1041
1042	int main (void)
1043	{
1044	ev_init (0);
1045
1046	evio_init (&wio, sin_cb, 0, EV_READ);
1047	evio_start (&wio);
1048
1049	struct ev_timer t[10000];
1050
1051	#if 0
1052	int i;
1053	for (i = 0; i < 10000; ++i)
1054	{	2309	}
1055	struct ev_timer *w = t + i;
1056	evw_init (w, ocb, i);
1057	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1058	evtimer_start (w);
1059	if (drand48 () < 0.5)
1060	evtimer_stop (w);
1061	}
1062	#endif
1063
1064	struct ev_timer t1;
1065	evtimer_init (&t1, ocb, 5, 10);
1066	evtimer_start (&t1);
1067
1068	struct ev_signal sig;
1069	evsignal_init (&sig, scb, SIGQUIT);
1070	evsignal_start (&sig);
1071
1072	struct ev_check cw;
1073	evcheck_init (&cw, gcb);
1074	evcheck_start (&cw);
1075
1076	struct ev_idle iw;
1077	evidle_init (&iw, gcb);
1078	evidle_start (&iw);
1079
1080	ev_loop (0);
1081
1082	return 0;
1083	}	2310	}
1084		2311
		2312	#ifdef __cplusplus
		2313	}
1085	#endif	2314	#endif
1086		2315
1087
1088
1089

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