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Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.177 by root, Tue Dec 11 15:06:50 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/time.h>	118	#include <sys/types.h>
42	#include <time.h>	119	#include <time.h>
43		120
44	#ifndef HAVE_MONOTONIC	121	#include <signal.h>
45	# ifdef CLOCK_MONOTONIC	122
46	# 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
47	# endif	138	# endif
48	#endif	139	#endif
49		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
50	#ifndef HAVE_SELECT	151	#ifndef EV_USE_SELECT
51	# 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
52	#endif	160	# endif
		161	#endif
53		162
54	#ifndef HAVE_EPOLL	163	#ifndef EV_USE_EPOLL
55	# 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
56	#endif	184	# endif
		185	#endif
57		186
58	#ifndef HAVE_REALTIME	187	#ifndef EV_INOTIFY_HASHSIZE
59	# 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
60	#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 */
61		230
62	#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) */
63	#define MAX_BLOCKTIME 60.	232	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		233	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
64		234
65	#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
66		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
67	typedef struct ev_watcher *W;	262	typedef ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	263	typedef ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	264	typedef ev_watcher_time *WT;
70		265
71	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
72	ev_tstamp ev_now;	364	ev_tstamp ev_rt_now;
73	int ev_method;	365	#define VAR(name,decl) static decl;
		366	#include "ev_vars.h"
		367	#undef VAR
74		368
75	static int have_monotonic; /* runtime */	369	static int ev_default_loop_ptr;
76		370
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	371	#endif
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		372
81	/*****************************************************************************/	373	/*****************************************************************************/
82		374
83	ev_tstamp	375	ev_tstamp
84	ev_time (void)	376	ev_time (void)
85	{	377	{
86	#if HAVE_REALTIME	378	#if EV_USE_REALTIME
87	struct timespec ts;	379	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	380	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	381	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	382	#else
91	struct timeval tv;	383	struct timeval tv;
92	gettimeofday (&tv, 0);	384	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	385	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	386	#endif
95	}	387	}
96		388
97	static ev_tstamp	389	ev_tstamp inline_size
98	get_clock (void)	390	get_clock (void)
99	{	391	{
100	#if HAVE_MONOTONIC	392	#if EV_USE_MONOTONIC
101	if (have_monotonic)	393	if (expect_true (have_monotonic))
102	{	394	{
103	struct timespec ts;	395	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	396	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	397	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	398	}
107	#endif	399	#endif
108		400
109	return ev_time ();	401	return ev_time ();
110	}	402	}
111		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
112	#define array_needsize(base,cur,cnt,init) \	440	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	441	if (expect_false ((cnt) > (cur))) \
114	{ \	442	{ \
115	int newcnt = cur ? cur << 1 : 16; \	443	int ocur_ = (cur); \
116	base = realloc (base, sizeof (*base) * (newcnt)); \	444	(base) = (type *)array_realloc \
117	init (base + cur, newcnt - cur); \	445	(sizeof (type), (base), &(cur), (cnt)); \
118	cur = newcnt; \	446	init ((base) + (ocur_), (cur) - ocur_); \
119	}	447	}
		448
		449	#if 0
		450	#define array_slim(type,stem) \
		451	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		452	{ \
		453	stem ## max = array_roundsize (stem ## cnt >> 1); \
		454	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		455	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		456	}
		457	#endif
		458
		459	#define array_free(stem, idx) \
		460	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		461
121	/*****************************************************************************/	462	/*****************************************************************************/
122		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
123	typedef struct	688	typedef struct
124	{	689	{
125	struct ev_io *head;	690	WL head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void
136	anfds_init (ANFD *base, int count)
137	{
138	while (count--)
139	{
140	base->head = 0;
141	base->wev = base->rev = EV_NONE;
142	++base;
143	}
144	}
145
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;
164	}
165	}
166
167	static void
168	fd_event (int fd, int events)
169	{
170	ANFD *anfd = anfds + fd;
171	struct ev_io *w;
172
173	for (w = anfd->head; w; w = w->next)
174	{
175	int ev = w->events & events;
176
177	if (ev)
178	event ((W)w, ev);
179	}
180	}
181
182	static void
183	queue_events (W *events, int eventcnt, int type)
184	{
185	int i;
186
187	for (i = 0; i < eventcnt; ++i)
188	event (events [i], type);
189	}
190
191	/* called on EBADF to verify fds */
192	static void
193	fd_recheck ()
194	{
195	int fd;
196
197	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)
201	evio_stop (anfds [fd].head);
202	}
203
204	/*****************************************************************************/
205
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void
213	upheap (WT *timers, int k)
214	{
215	WT w = timers [k];
216
217	while (k && timers [k >> 1]->at > w->at)
218	{
219	timers [k] = timers [k >> 1];
220	timers [k]->active = k + 1;
221	k >>= 1;
222	}
223
224	timers [k] = w;
225	timers [k]->active = k + 1;
226
227	}
228
229	static void
230	downheap (WT *timers, int N, int k)
231	{
232	WT w = timers [k];
233
234	while (k < (N >> 1))
235	{
236	int j = k << 1;
237
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239	++j;
240
241	if (w->at <= timers [j]->at)
242	break;
243
244	timers [k] = timers [j];
245	timers [k]->active = k + 1;
246	k = j;
247	}
248
249	timers [k] = w;
250	timers [k]->active = k + 1;
251	}
252
253	/*****************************************************************************/
254
255	typedef struct
256	{
257	struct ev_signal *head;
258	sig_atomic_t gotsig;	691	sig_atomic_t volatile gotsig;
259	} ANSIG;	692	} ANSIG;
260		693
261	static ANSIG *signals;	694	static ANSIG *signals;
262	static int signalmax;	695	static int signalmax;
263		696
264	static int sigpipe [2];	697	static int sigpipe [2];
265	static sig_atomic_t gotsig;	698	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	699	static ev_io sigev;
267		700
268	static void	701	void inline_size
269	signals_init (ANSIG *base, int count)	702	signals_init (ANSIG *base, int count)
270	{	703	{
271	while (count--)	704	while (count--)
272	{	705	{
273	base->head = 0;	706	base->head = 0;
274	base->gotsig = 0;	707	base->gotsig = 0;
		708
275	++base;	709	++base;
276	}	710	}
277	}	711	}
278		712
279	static void	713	static void
280	sighandler (int signum)	714	sighandler (int signum)
281	{	715	{
		716	#if _WIN32
		717	signal (signum, sighandler);
		718	#endif
		719
282	signals [signum - 1].gotsig = 1;	720	signals [signum - 1].gotsig = 1;
283		721
284	if (!gotsig)	722	if (!gotsig)
285	{	723	{
		724	int old_errno = errno;
286	gotsig = 1;	725	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	726	write (sigpipe [1], &signum, 1);
		727	errno = old_errno;
288	}	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);
289	}	749	}
290		750
291	static void	751	static void
292	sigcb (struct ev_io *iow, int revents)	752	sigcb (EV_P_ ev_io *iow, int revents)
293	{	753	{
294	struct ev_signal *w;
295	int sig;	754	int signum;
296		755
		756	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	757	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		758
300	for (sig = signalmax; sig--; )	759	for (signum = signalmax; signum--; )
301	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)
302	{	802	{
303	signals [sig].gotsig = 0;	803	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
304		804	w->rpid = pid;
305	for (w = signals [sig].head; w; w = w->next)	805	w->rstatus = status;
306	event ((W)w, EV_SIGNAL);	806	ev_feed_event (EV_A_ (W)w, EV_CHILD);
307	}	807	}
308	}	808	}
309		809
		810	#ifndef WCONTINUED
		811	# define WCONTINUED 0
		812	#endif
		813
310	static void	814	static void
311	siginit (void)	815	childcb (EV_P_ ev_signal *sw, int revents)
312	{	816	{
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	817	int pid, status;
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		818
316	/* rather than sort out wether we really need nb, set it */	819	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	820	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	821	if (!WCONTINUED
		822	|| errno != EINVAL
		823	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		824	return;
319		825
320	evio_set (&sigev, sigpipe [0], EV_READ);	826	/* make sure we are called again until all childs have been reaped */
321	evio_start (&sigev);	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 */
322	}	833	}
		834
		835	#endif
323		836
324	/*****************************************************************************/	837	/*****************************************************************************/
325		838
326	static struct ev_idle **idles;	839	#if EV_USE_PORT
327	static int idlemax, idlecnt;	840	# include "ev_port.c"
		841	#endif
		842	#if EV_USE_KQUEUE
		843	# include "ev_kqueue.c"
		844	#endif
		845	#if EV_USE_EPOLL
		846	# include "ev_epoll.c"
		847	#endif
		848	#if EV_USE_POLL
		849	# include "ev_poll.c"
		850	#endif
		851	#if EV_USE_SELECT
		852	# include "ev_select.c"
		853	#endif
328		854
329	static struct ev_prepare **prepares;	855	int
330	static int preparemax, preparecnt;	856	ev_version_major (void)
		857	{
		858	return EV_VERSION_MAJOR;
		859	}
331		860
332	static struct ev_check **checks;	861	int
333	static int checkmax, checkcnt;	862	ev_version_minor (void)
		863	{
		864	return EV_VERSION_MINOR;
		865	}
		866
		867	/* return true if we are running with elevated privileges and should ignore env variables */
		868	int inline_size
		869	enable_secure (void)
		870	{
		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)
		935	{
		936	#if EV_USE_MONOTONIC
		937	{
		938	struct timespec ts;
		939	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		940	have_monotonic = 1;
		941	}
		942	#endif
		943
		944	ev_rt_now = ev_time ();
		945	mn_now = get_clock ();
		946	now_floor = mn_now;
		947	rtmn_diff = ev_rt_now - mn_now;
		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])
		1115	if (pipe (sigpipe))
		1116	return 0;
		1117
		1118	if (!ev_default_loop_ptr)
		1119	{
		1120	#if EV_MULTIPLICITY
		1121	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1122	#else
		1123	ev_default_loop_ptr = 1;
		1124	#endif
		1125
		1126	loop_init (EV_A_ flags);
		1127
		1128	if (ev_backend (EV_A))
		1129	{
		1130	siginit (EV_A);
		1131
		1132	#ifndef _WIN32
		1133	ev_signal_init (&childev, childcb, SIGCHLD);
		1134	ev_set_priority (&childev, EV_MAXPRI);
		1135	ev_signal_start (EV_A_ &childev);
		1136	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1137	#endif
		1138	}
		1139	else
		1140	ev_default_loop_ptr = 0;
		1141	}
		1142
		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;
		1176	}
334		1177
335	/*****************************************************************************/	1178	/*****************************************************************************/
336		1179
337	#if HAVE_EPOLL	1180	void
338	# include "ev_epoll.c"	1181	ev_invoke (EV_P_ void *w, int revents)
339	#endif
340	#if HAVE_SELECT
341	# include "ev_select.c"
342	#endif
343
344	int ev_init (int flags)
345	{	1182	{
346	#if HAVE_MONOTONIC	1183	EV_CB_INVOKE ((W)w, revents);
347	{
348	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;
351	}
352	#endif
353
354	ev_now = ev_time ();
355	now = get_clock ();
356	diff = ev_now - now;
357
358	if (pipe (sigpipe))
359	return 0;
360
361	ev_method = EVMETHOD_NONE;
362	#if HAVE_EPOLL
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364	#endif
365	#if HAVE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);
367	#endif
368
369	if (ev_method)
370	{
371	evw_init (&sigev, sigcb);
372	siginit ();
373	}
374
375	return ev_method;
376	}	1184	}
377		1185
378	/*****************************************************************************/	1186	void inline_speed
379		1187	call_pending (EV_P)
380	void ev_prefork (void)
381	{	1188	{
382	/* nop */
383	}
384
385	void ev_postfork_parent (void)
386	{
387	/* nop */
388	}
389
390	void ev_postfork_child (void)
391	{
392	#if HAVE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();
395	#endif
396
397	evio_stop (&sigev);
398	close (sigpipe [0]);
399	close (sigpipe [1]);
400	pipe (sigpipe);
401	siginit ();
402	}
403
404	/*****************************************************************************/
405
406	static void
407	fd_reify (void)
408	{
409	int i;	1189	int pri;
410		1190
411	for (i = 0; i < fdchangecnt; ++i)	1191	for (pri = NUMPRI; pri--; )
		1192	while (pendingcnt [pri])
412	{	1193	{
413	int fd = fdchanges [i];	1194	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
414	ANFD *anfd = anfds + fd;
415	struct ev_io *w;
416		1195
417	int wev = 0;	1196	if (expect_true (p->w))
418
419	for (w = anfd->head; w; w = w->next)
420	wev |= w->events;
421
422	if (anfd->wev != wev)
423	{	1197	{
424	method_modify (fd, anfd->wev, wev);	1198	/*assert (("non-pending watcher on pending list", p->w->pending));*/
425	anfd->wev = wev;
426	}
427	}
428		1199
429	fdchangecnt = 0;
430	}
431
432	static void
433	call_pending ()
434	{
435	while (pendingcnt)
436	{
437	ANPENDING *p = pendings + --pendingcnt;
438
439	if (p->w)
440	{
441	p->w->pending = 0;	1200	p->w->pending = 0;
442	p->w->cb (p->w, p->events);	1201	EV_CB_INVOKE (p->w, p->events);
443	}	1202	}
444	}	1203	}
445	}	1204	}
446		1205
447	static void	1206	void inline_size
448	timers_reify ()	1207	timers_reify (EV_P)
449	{	1208	{
450	while (timercnt && timers [0]->at <= now)	1209	while (timercnt && ((WT)timers [0])->at <= mn_now)
451	{	1210	{
452	struct ev_timer *w = timers [0];	1211	ev_timer *w = timers [0];
453		1212
454	event ((W)w, EV_TIMEOUT);	1213	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
455		1214
456	/* first reschedule or stop timer */	1215	/* first reschedule or stop timer */
457	if (w->repeat)	1216	if (w->repeat)
458	{	1217	{
		1218	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1219
459	w->at = now + w->repeat;	1220	((WT)w)->at += w->repeat;
460	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
461	downheap ((WT *)timers, timercnt, 0);	1224	downheap ((WT *)timers, timercnt, 0);
462	}	1225	}
463	else	1226	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	1227	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		1228
468	static void	1229	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1230	}
		1231	}
		1232
		1233	#if EV_PERIODIC_ENABLE
		1234	void inline_size
469	periodics_reify ()	1235	periodics_reify (EV_P)
470	{	1236	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	1237	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
472	{	1238	{
473	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)));*/
474		1242
475	/* first reschedule or stop timer */	1243	/* first reschedule or stop timer */
476	if (w->interval)	1244	if (w->reschedule_cb)
477	{	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	{
478	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;
479	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));
480	downheap ((WT *)periodics, periodiccnt, 0);	1255	downheap ((WT *)periodics, periodiccnt, 0);
481	}	1256	}
482	else	1257	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	1258	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		1259
485	event ((W)w, EV_TIMEOUT);	1260	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486	}	1261	}
487	}	1262	}
488		1263
489	static void	1264	static void noinline
490	periodics_reschedule (ev_tstamp diff)	1265	periodics_reschedule (EV_P)
491	{	1266	{
492	int i;	1267	int i;
493		1268
494	/* adjust periodics after time jump */	1269	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	1270	for (i = 0; i < periodiccnt; ++i)
496	{	1271	{
497	struct ev_periodic *w = periodics [i];	1272	ev_periodic *w = periodics [i];
498		1273
		1274	if (w->reschedule_cb)
		1275	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
499	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--; )
500	{	1295	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1296	if (pendingcnt [pri])
		1297	break;
502		1298
503	if (fabs (diff) >= 1e-4)	1299	if (idlecnt [pri])
504	{	1300	{
505	evperiodic_stop (w);	1301	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
506	evperiodic_start (w);	1302	break;
507
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */
509	}	1303	}
510	}	1304	}
511	}	1305	}
512	}	1306	}
		1307	#endif
513		1308
514	static void	1309	int inline_size
		1310	time_update_monotonic (EV_P)
		1311	{
		1312	mn_now = get_clock ();
		1313
		1314	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1315	{
		1316	ev_rt_now = rtmn_diff + mn_now;
		1317	return 0;
		1318	}
		1319	else
		1320	{
		1321	now_floor = mn_now;
		1322	ev_rt_now = ev_time ();
		1323	return 1;
		1324	}
		1325	}
		1326
		1327	void inline_size
515	time_update ()	1328	time_update (EV_P)
516	{	1329	{
517	int i;	1330	int i;
518		1331
519	ev_now = ev_time ();	1332	#if EV_USE_MONOTONIC
520
521	if (have_monotonic)	1333	if (expect_true (have_monotonic))
522	{	1334	{
523	ev_tstamp odiff = diff;	1335	if (time_update_monotonic (EV_A))
524
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
526	{	1336	{
527	now = get_clock ();	1337	ev_tstamp odiff = rtmn_diff;
		1338
		1339	/* loop a few times, before making important decisions.
		1340	* on the choice of "4": one iteration isn't enough,
		1341	* in case we get preempted during the calls to
		1342	* ev_time and get_clock. a second call is almost guaranteed
		1343	* to succeed in that case, though. and looping a few more times
		1344	* doesn't hurt either as we only do this on time-jumps or
		1345	* in the unlikely event of having been preempted here.
		1346	*/
		1347	for (i = 4; --i; )
		1348	{
528	diff = ev_now - now;	1349	rtmn_diff = ev_rt_now - mn_now;
529		1350
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1351	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
531	return; /* all is well */	1352	return; /* all is well */
532		1353
533	ev_now = ev_time ();	1354	ev_rt_now = ev_time ();
		1355	mn_now = get_clock ();
		1356	now_floor = mn_now;
		1357	}
		1358
		1359	# if EV_PERIODIC_ENABLE
		1360	periodics_reschedule (EV_A);
		1361	# endif
		1362	/* no timer adjustment, as the monotonic clock doesn't jump */
		1363	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
534	}	1364	}
535
536	periodics_reschedule (diff - odiff);
537	/* no timer adjustment, as the monotonic clock doesn't jump */
538	}	1365	}
539	else	1366	else
		1367	#endif
540	{	1368	{
541	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1369	ev_rt_now = ev_time ();
		1370
		1371	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
542	{	1372	{
		1373	#if EV_PERIODIC_ENABLE
543	periodics_reschedule (ev_now - now);	1374	periodics_reschedule (EV_A);
544		1375	#endif
545	/* adjust timers. this is easy, as the offset is the same for all */	1376	/* adjust timers. this is easy, as the offset is the same for all of them */
546	for (i = 0; i < timercnt; ++i)	1377	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	1378	((WT)timers [i])->at += ev_rt_now - mn_now;
548	}	1379	}
549		1380
550	now = ev_now;	1381	mn_now = ev_rt_now;
551	}	1382	}
552	}	1383	}
553		1384
554	int ev_loop_done;	1385	void
		1386	ev_ref (EV_P)
		1387	{
		1388	++activecnt;
		1389	}
555		1390
		1391	void
		1392	ev_unref (EV_P)
		1393	{
		1394	--activecnt;
		1395	}
		1396
		1397	static int loop_done;
		1398
		1399	void
556	void ev_loop (int flags)	1400	ev_loop (EV_P_ int flags)
557	{	1401	{
558	double block;	1402	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1403	? EVUNLOOP_ONE
		1404	: EVUNLOOP_CANCEL;
		1405
		1406	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
560		1407
561	do	1408	do
562	{	1409	{
		1410	#ifndef _WIN32
		1411	if (expect_false (curpid)) /* penalise the forking check even more */
		1412	if (expect_false (getpid () != curpid))
		1413	{
		1414	curpid = getpid ();
		1415	postfork = 1;
		1416	}
		1417	#endif
		1418
		1419	#if EV_FORK_ENABLE
		1420	/* we might have forked, so queue fork handlers */
		1421	if (expect_false (postfork))
		1422	if (forkcnt)
		1423	{
		1424	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1425	call_pending (EV_A);
		1426	}
		1427	#endif
		1428
563	/* queue check watchers (and execute them) */	1429	/* queue prepare watchers (and execute them) */
564	if (checkcnt)	1430	if (expect_false (preparecnt))
565	{	1431	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1432	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	1433	call_pending (EV_A);
568	}	1434	}
569		1435
		1436	if (expect_false (!activecnt))
		1437	break;
		1438
		1439	/* we might have forked, so reify kernel state if necessary */
		1440	if (expect_false (postfork))
		1441	loop_fork (EV_A);
		1442
570	/* update fd-related kernel structures */	1443	/* update fd-related kernel structures */
571	fd_reify ();	1444	fd_reify (EV_A);
572		1445
573	/* calculate blocking time */	1446	/* calculate blocking time */
		1447	{
		1448	ev_tstamp block;
574		1449
575	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1450	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
576	ev_now = ev_time ();	1451	block = 0.; /* do not block at all */
577
578	if (flags & EVLOOP_NONBLOCK || idlecnt)
579	block = 0.;
580	else	1452	else
581	{	1453	{
		1454	/* update time to cancel out callback processing overhead */
		1455	#if EV_USE_MONOTONIC
		1456	if (expect_true (have_monotonic))
		1457	time_update_monotonic (EV_A);
		1458	else
		1459	#endif
		1460	{
		1461	ev_rt_now = ev_time ();
		1462	mn_now = ev_rt_now;
		1463	}
		1464
582	block = MAX_BLOCKTIME;	1465	block = MAX_BLOCKTIME;
583		1466
584	if (timercnt)	1467	if (timercnt)
585	{	1468	{
586	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1469	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
587	if (block > to) block = to;	1470	if (block > to) block = to;
588	}	1471	}
589		1472
		1473	#if EV_PERIODIC_ENABLE
590	if (periodiccnt)	1474	if (periodiccnt)
591	{	1475	{
592	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1476	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
593	if (block > to) block = to;	1477	if (block > to) block = to;
594	}	1478	}
		1479	#endif
595		1480
596	if (block < 0.) block = 0.;	1481	if (expect_false (block < 0.)) block = 0.;
597	}	1482	}
598		1483
599	method_poll (block);	1484	++loop_count;
		1485	backend_poll (EV_A_ block);
		1486	}
600		1487
601	/* update ev_now, do magic */	1488	/* update ev_rt_now, do magic */
602	time_update ();	1489	time_update (EV_A);
603		1490
604	/* queue pending timers and reschedule them */	1491	/* queue pending timers and reschedule them */
605	timers_reify (); /* relative timers called last */	1492	timers_reify (EV_A); /* relative timers called last */
		1493	#if EV_PERIODIC_ENABLE
606	periodics_reify (); /* absolute timers called first */	1494	periodics_reify (EV_A); /* absolute timers called first */
		1495	#endif
607		1496
		1497	#if EV_IDLE_ENABLE
608	/* queue idle watchers unless io or timers are pending */	1498	/* queue idle watchers unless other events are pending */
609	if (!pendingcnt)	1499	idle_reify (EV_A);
610	queue_events ((W *)idles, idlecnt, EV_IDLE);	1500	#endif
611		1501
612	/* queue check watchers, to be executed first */	1502	/* queue check watchers, to be executed first */
613	if (checkcnt)	1503	if (expect_false (checkcnt))
614	queue_events ((W *)checks, checkcnt, EV_CHECK);	1504	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
615		1505
616	call_pending ();	1506	call_pending (EV_A);
617	}
618	while (!ev_loop_done);
619		1507
620	if (ev_loop_done != 2)	1508	}
		1509	while (expect_true (activecnt && !loop_done));
		1510
		1511	if (loop_done == EVUNLOOP_ONE)
		1512	loop_done = EVUNLOOP_CANCEL;
		1513	}
		1514
		1515	void
		1516	ev_unloop (EV_P_ int how)
		1517	{
621	ev_loop_done = 0;	1518	loop_done = how;
622	}	1519	}
623		1520
624	/*****************************************************************************/	1521	/*****************************************************************************/
625		1522
626	static void	1523	void inline_size
627	wlist_add (WL *head, WL elem)	1524	wlist_add (WL *head, WL elem)
628	{	1525	{
629	elem->next = *head;	1526	elem->next = *head;
630	*head = elem;	1527	*head = elem;
631	}	1528	}
632		1529
633	static void	1530	void inline_size
634	wlist_del (WL *head, WL elem)	1531	wlist_del (WL *head, WL elem)
635	{	1532	{
636	while (*head)	1533	while (*head)
637	{	1534	{
638	if (*head == elem)	1535	if (*head == elem)
…		…
643		1540
644	head = &(*head)->next;	1541	head = &(*head)->next;
645	}	1542	}
646	}	1543	}
647		1544
648	static void	1545	void inline_speed
649	ev_clear (W w)	1546	clear_pending (EV_P_ W w)
650	{	1547	{
651	if (w->pending)	1548	if (w->pending)
652	{	1549	{
653	pendings [w->pending - 1].w = 0;	1550	pendings [ABSPRI (w)][w->pending - 1].w = 0;
654	w->pending = 0;	1551	w->pending = 0;
655	}	1552	}
656	}	1553	}
657		1554
658	static void	1555	int
		1556	ev_clear_pending (EV_P_ void *w)
		1557	{
		1558	W w_ = (W)w;
		1559	int pending = w_->pending;
		1560
		1561	if (expect_true (pending))
		1562	{
		1563	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1564	w_->pending = 0;
		1565	p->w = 0;
		1566	return p->events;
		1567	}
		1568	else
		1569	return 0;
		1570	}
		1571
		1572	void inline_size
		1573	pri_adjust (EV_P_ W w)
		1574	{
		1575	int pri = w->priority;
		1576	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1577	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1578	w->priority = pri;
		1579	}
		1580
		1581	void inline_speed
659	ev_start (W w, int active)	1582	ev_start (EV_P_ W w, int active)
660	{	1583	{
		1584	pri_adjust (EV_A_ w);
661	w->active = active;	1585	w->active = active;
		1586	ev_ref (EV_A);
662	}	1587	}
663		1588
664	static void	1589	void inline_size
665	ev_stop (W w)	1590	ev_stop (EV_P_ W w)
666	{	1591	{
		1592	ev_unref (EV_A);
667	w->active = 0;	1593	w->active = 0;
668	}	1594	}
669		1595
670	/*****************************************************************************/	1596	/*****************************************************************************/
671		1597
672	void	1598	void noinline
673	evio_start (struct ev_io *w)	1599	ev_io_start (EV_P_ ev_io *w)
674	{	1600	{
675	if (ev_is_active (w))
676	return;
677
678	int fd = w->fd;	1601	int fd = w->fd;
679		1602
		1603	if (expect_false (ev_is_active (w)))
		1604	return;
		1605
		1606	assert (("ev_io_start called with negative fd", fd >= 0));
		1607
680	ev_start ((W)w, 1);	1608	ev_start (EV_A_ (W)w, 1);
681	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1609	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
682	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1610	wlist_add ((WL *)&anfds[fd].head, (WL)w);
683		1611
684	++fdchangecnt;	1612	fd_change (EV_A_ fd);
685	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
686	fdchanges [fdchangecnt - 1] = fd;
687	}	1613	}
688		1614
689	void	1615	void noinline
690	evio_stop (struct ev_io *w)	1616	ev_io_stop (EV_P_ ev_io *w)
691	{	1617	{
692	ev_clear ((W)w);	1618	clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1619	if (expect_false (!ev_is_active (w)))
694	return;	1620	return;
		1621
		1622	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
695		1623
696	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1624	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
697	ev_stop ((W)w);	1625	ev_stop (EV_A_ (W)w);
698		1626
699	++fdchangecnt;	1627	fd_change (EV_A_ w->fd);
700	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
701	fdchanges [fdchangecnt - 1] = w->fd;
702	}	1628	}
703		1629
704	void	1630	void noinline
705	evtimer_start (struct ev_timer *w)	1631	ev_timer_start (EV_P_ ev_timer *w)
706	{	1632	{
707	if (ev_is_active (w))	1633	if (expect_false (ev_is_active (w)))
708	return;	1634	return;
709		1635
710	w->at += now;	1636	((WT)w)->at += mn_now;
711		1637
712	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1638	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
713		1639
714	ev_start ((W)w, ++timercnt);	1640	ev_start (EV_A_ (W)w, ++timercnt);
715	array_needsize (timers, timermax, timercnt, );	1641	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
716	timers [timercnt - 1] = w;	1642	timers [timercnt - 1] = w;
717	upheap ((WT *)timers, timercnt - 1);	1643	upheap ((WT *)timers, timercnt - 1);
718	}
719		1644
720	void	1645	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1646	}
		1647
		1648	void noinline
721	evtimer_stop (struct ev_timer *w)	1649	ev_timer_stop (EV_P_ ev_timer *w)
722	{	1650	{
723	ev_clear ((W)w);	1651	clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1652	if (expect_false (!ev_is_active (w)))
725	return;	1653	return;
726		1654
727	if (w->active < timercnt--)	1655	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1656
		1657	{
		1658	int active = ((W)w)->active;
		1659
		1660	if (expect_true (--active < --timercnt))
728	{	1661	{
729	timers [w->active - 1] = timers [timercnt];	1662	timers [active] = timers [timercnt];
730	downheap ((WT *)timers, timercnt, w->active - 1);	1663	adjustheap ((WT *)timers, timercnt, active);
731	}	1664	}
		1665	}
732		1666
733	w->at = w->repeat;	1667	((WT)w)->at -= mn_now;
734		1668
735	ev_stop ((W)w);	1669	ev_stop (EV_A_ (W)w);
736	}	1670	}
737		1671
738	void	1672	void noinline
739	evtimer_again (struct ev_timer *w)	1673	ev_timer_again (EV_P_ ev_timer *w)
740	{	1674	{
741	if (ev_is_active (w))	1675	if (ev_is_active (w))
742	{	1676	{
743	if (w->repeat)	1677	if (w->repeat)
744	{	1678	{
745	w->at = now + w->repeat;	1679	((WT)w)->at = mn_now + w->repeat;
746	downheap ((WT *)timers, timercnt, w->active - 1);	1680	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
747	}	1681	}
748	else	1682	else
749	evtimer_stop (w);	1683	ev_timer_stop (EV_A_ w);
750	}	1684	}
751	else if (w->repeat)	1685	else if (w->repeat)
		1686	{
		1687	w->at = w->repeat;
752	evtimer_start (w);	1688	ev_timer_start (EV_A_ w);
		1689	}
753	}	1690	}
754		1691
755	void	1692	#if EV_PERIODIC_ENABLE
		1693	void noinline
756	evperiodic_start (struct ev_periodic *w)	1694	ev_periodic_start (EV_P_ ev_periodic *w)
757	{	1695	{
758	if (ev_is_active (w))	1696	if (expect_false (ev_is_active (w)))
759	return;	1697	return;
760		1698
761	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1699	if (w->reschedule_cb)
762		1700	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1701	else if (w->interval)
		1702	{
		1703	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
763	/* this formula differs from the one in periodic_reify because we do not always round up */	1704	/* this formula differs from the one in periodic_reify because we do not always round up */
764	if (w->interval)
765	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1705	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1706	}
		1707	else
		1708	((WT)w)->at = w->offset;
766		1709
767	ev_start ((W)w, ++periodiccnt);	1710	ev_start (EV_A_ (W)w, ++periodiccnt);
768	array_needsize (periodics, periodicmax, periodiccnt, );	1711	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
769	periodics [periodiccnt - 1] = w;	1712	periodics [periodiccnt - 1] = w;
770	upheap ((WT *)periodics, periodiccnt - 1);	1713	upheap ((WT *)periodics, periodiccnt - 1);
771	}
772		1714
773	void	1715	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1716	}
		1717
		1718	void noinline
774	evperiodic_stop (struct ev_periodic *w)	1719	ev_periodic_stop (EV_P_ ev_periodic *w)
775	{	1720	{
776	ev_clear ((W)w);	1721	clear_pending (EV_A_ (W)w);
777	if (!ev_is_active (w))	1722	if (expect_false (!ev_is_active (w)))
778	return;	1723	return;
779		1724
780	if (w->active < periodiccnt--)	1725	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1726
		1727	{
		1728	int active = ((W)w)->active;
		1729
		1730	if (expect_true (--active < --periodiccnt))
781	{	1731	{
782	periodics [w->active - 1] = periodics [periodiccnt];	1732	periodics [active] = periodics [periodiccnt];
783	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1733	adjustheap ((WT *)periodics, periodiccnt, active);
784	}	1734	}
		1735	}
785		1736
786	ev_stop ((W)w);	1737	ev_stop (EV_A_ (W)w);
787	}	1738	}
788		1739
789	void	1740	void noinline
		1741	ev_periodic_again (EV_P_ ev_periodic *w)
		1742	{
		1743	/* TODO: use adjustheap and recalculation */
		1744	ev_periodic_stop (EV_A_ w);
		1745	ev_periodic_start (EV_A_ w);
		1746	}
		1747	#endif
		1748
		1749	#ifndef SA_RESTART
		1750	# define SA_RESTART 0
		1751	#endif
		1752
		1753	void noinline
790	evsignal_start (struct ev_signal *w)	1754	ev_signal_start (EV_P_ ev_signal *w)
791	{	1755	{
		1756	#if EV_MULTIPLICITY
		1757	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1758	#endif
792	if (ev_is_active (w))	1759	if (expect_false (ev_is_active (w)))
793	return;	1760	return;
794		1761
		1762	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1763
795	ev_start ((W)w, 1);	1764	ev_start (EV_A_ (W)w, 1);
796	array_needsize (signals, signalmax, w->signum, signals_init);	1765	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
797	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1766	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
798		1767
799	if (!w->next)	1768	if (!((WL)w)->next)
800	{	1769	{
		1770	#if _WIN32
		1771	signal (w->signum, sighandler);
		1772	#else
801	struct sigaction sa;	1773	struct sigaction sa;
802	sa.sa_handler = sighandler;	1774	sa.sa_handler = sighandler;
803	sigfillset (&sa.sa_mask);	1775	sigfillset (&sa.sa_mask);
804	sa.sa_flags = 0;	1776	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
805	sigaction (w->signum, &sa, 0);	1777	sigaction (w->signum, &sa, 0);
		1778	#endif
806	}	1779	}
807	}	1780	}
808		1781
809	void	1782	void noinline
810	evsignal_stop (struct ev_signal *w)	1783	ev_signal_stop (EV_P_ ev_signal *w)
811	{	1784	{
812	ev_clear ((W)w);	1785	clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1786	if (expect_false (!ev_is_active (w)))
814	return;	1787	return;
815		1788
816	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1789	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
817	ev_stop ((W)w);	1790	ev_stop (EV_A_ (W)w);
818		1791
819	if (!signals [w->signum - 1].head)	1792	if (!signals [w->signum - 1].head)
820	signal (w->signum, SIG_DFL);	1793	signal (w->signum, SIG_DFL);
821	}	1794	}
822		1795
823	void evidle_start (struct ev_idle *w)	1796	void
		1797	ev_child_start (EV_P_ ev_child *w)
824	{	1798	{
		1799	#if EV_MULTIPLICITY
		1800	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1801	#endif
825	if (ev_is_active (w))	1802	if (expect_false (ev_is_active (w)))
826	return;	1803	return;
827		1804
828	ev_start ((W)w, ++idlecnt);	1805	ev_start (EV_A_ (W)w, 1);
829	array_needsize (idles, idlemax, idlecnt, );	1806	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
830	idles [idlecnt - 1] = w;
831	}	1807	}
832		1808
833	void evidle_stop (struct ev_idle *w)	1809	void
		1810	ev_child_stop (EV_P_ ev_child *w)
834	{	1811	{
835	ev_clear ((W)w);	1812	clear_pending (EV_A_ (W)w);
836	if (ev_is_active (w))	1813	if (expect_false (!ev_is_active (w)))
837	return;	1814	return;
838		1815
839	idles [w->active - 1] = idles [--idlecnt];	1816	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
840	ev_stop ((W)w);	1817	ev_stop (EV_A_ (W)w);
841	}	1818	}
842		1819
		1820	#if EV_STAT_ENABLE
		1821
		1822	# ifdef _WIN32
		1823	# undef lstat
		1824	# define lstat(a,b) _stati64 (a,b)
		1825	# endif
		1826
		1827	#define DEF_STAT_INTERVAL 5.0074891
		1828	#define MIN_STAT_INTERVAL 0.1074891
		1829
		1830	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1831
		1832	#if EV_USE_INOTIFY
		1833	# define EV_INOTIFY_BUFSIZE 8192
		1834
		1835	static void noinline
		1836	infy_add (EV_P_ ev_stat *w)
		1837	{
		1838	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);
		1839
		1840	if (w->wd < 0)
		1841	{
		1842	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1843
		1844	/* monitor some parent directory for speedup hints */
		1845	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1846	{
		1847	char path [4096];
		1848	strcpy (path, w->path);
		1849
		1850	do
		1851	{
		1852	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1853	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1854
		1855	char *pend = strrchr (path, '/');
		1856
		1857	if (!pend)
		1858	break; /* whoops, no '/', complain to your admin */
		1859
		1860	*pend = 0;
		1861	w->wd = inotify_add_watch (fs_fd, path, mask);
		1862	}
		1863	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1864	}
		1865	}
		1866	else
		1867	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1868
		1869	if (w->wd >= 0)
		1870	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1871	}
		1872
		1873	static void noinline
		1874	infy_del (EV_P_ ev_stat *w)
		1875	{
		1876	int slot;
		1877	int wd = w->wd;
		1878
		1879	if (wd < 0)
		1880	return;
		1881
		1882	w->wd = -2;
		1883	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1884	wlist_del (&fs_hash [slot].head, (WL)w);
		1885
		1886	/* remove this watcher, if others are watching it, they will rearm */
		1887	inotify_rm_watch (fs_fd, wd);
		1888	}
		1889
		1890	static void noinline
		1891	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1892	{
		1893	if (slot < 0)
		1894	/* overflow, need to check for all hahs slots */
		1895	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1896	infy_wd (EV_A_ slot, wd, ev);
		1897	else
		1898	{
		1899	WL w_;
		1900
		1901	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1902	{
		1903	ev_stat *w = (ev_stat *)w_;
		1904	w_ = w_->next; /* lets us remove this watcher and all before it */
		1905
		1906	if (w->wd == wd || wd == -1)
		1907	{
		1908	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1909	{
		1910	w->wd = -1;
		1911	infy_add (EV_A_ w); /* re-add, no matter what */
		1912	}
		1913
		1914	stat_timer_cb (EV_A_ &w->timer, 0);
		1915	}
		1916	}
		1917	}
		1918	}
		1919
		1920	static void
		1921	infy_cb (EV_P_ ev_io *w, int revents)
		1922	{
		1923	char buf [EV_INOTIFY_BUFSIZE];
		1924	struct inotify_event *ev = (struct inotify_event *)buf;
		1925	int ofs;
		1926	int len = read (fs_fd, buf, sizeof (buf));
		1927
		1928	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1929	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1930	}
		1931
		1932	void inline_size
		1933	infy_init (EV_P)
		1934	{
		1935	if (fs_fd != -2)
		1936	return;
		1937
		1938	fs_fd = inotify_init ();
		1939
		1940	if (fs_fd >= 0)
		1941	{
		1942	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1943	ev_set_priority (&fs_w, EV_MAXPRI);
		1944	ev_io_start (EV_A_ &fs_w);
		1945	}
		1946	}
		1947
		1948	void inline_size
		1949	infy_fork (EV_P)
		1950	{
		1951	int slot;
		1952
		1953	if (fs_fd < 0)
		1954	return;
		1955
		1956	close (fs_fd);
		1957	fs_fd = inotify_init ();
		1958
		1959	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1960	{
		1961	WL w_ = fs_hash [slot].head;
		1962	fs_hash [slot].head = 0;
		1963
		1964	while (w_)
		1965	{
		1966	ev_stat *w = (ev_stat *)w_;
		1967	w_ = w_->next; /* lets us add this watcher */
		1968
		1969	w->wd = -1;
		1970
		1971	if (fs_fd >= 0)
		1972	infy_add (EV_A_ w); /* re-add, no matter what */
		1973	else
		1974	ev_timer_start (EV_A_ &w->timer);
		1975	}
		1976
		1977	}
		1978	}
		1979
		1980	#endif
		1981
		1982	void
		1983	ev_stat_stat (EV_P_ ev_stat *w)
		1984	{
		1985	if (lstat (w->path, &w->attr) < 0)
		1986	w->attr.st_nlink = 0;
		1987	else if (!w->attr.st_nlink)
		1988	w->attr.st_nlink = 1;
		1989	}
		1990
		1991	static void noinline
		1992	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1993	{
		1994	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1995
		1996	/* we copy this here each the time so that */
		1997	/* prev has the old value when the callback gets invoked */
		1998	w->prev = w->attr;
		1999	ev_stat_stat (EV_A_ w);
		2000
		2001	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2002	if (
		2003	w->prev.st_dev != w->attr.st_dev
		2004	|| w->prev.st_ino != w->attr.st_ino
		2005	|| w->prev.st_mode != w->attr.st_mode
		2006	|| w->prev.st_nlink != w->attr.st_nlink
		2007	|| w->prev.st_uid != w->attr.st_uid
		2008	|| w->prev.st_gid != w->attr.st_gid
		2009	|| w->prev.st_rdev != w->attr.st_rdev
		2010	|| w->prev.st_size != w->attr.st_size
		2011	|| w->prev.st_atime != w->attr.st_atime
		2012	|| w->prev.st_mtime != w->attr.st_mtime
		2013	|| w->prev.st_ctime != w->attr.st_ctime
		2014	) {
		2015	#if EV_USE_INOTIFY
		2016	infy_del (EV_A_ w);
		2017	infy_add (EV_A_ w);
		2018	ev_stat_stat (EV_A_ w); /* avoid race... */
		2019	#endif
		2020
		2021	ev_feed_event (EV_A_ w, EV_STAT);
		2022	}
		2023	}
		2024
		2025	void
		2026	ev_stat_start (EV_P_ ev_stat *w)
		2027	{
		2028	if (expect_false (ev_is_active (w)))
		2029	return;
		2030
		2031	/* since we use memcmp, we need to clear any padding data etc. */
		2032	memset (&w->prev, 0, sizeof (ev_statdata));
		2033	memset (&w->attr, 0, sizeof (ev_statdata));
		2034
		2035	ev_stat_stat (EV_A_ w);
		2036
		2037	if (w->interval < MIN_STAT_INTERVAL)
		2038	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2039
		2040	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2041	ev_set_priority (&w->timer, ev_priority (w));
		2042
		2043	#if EV_USE_INOTIFY
		2044	infy_init (EV_A);
		2045
		2046	if (fs_fd >= 0)
		2047	infy_add (EV_A_ w);
		2048	else
		2049	#endif
		2050	ev_timer_start (EV_A_ &w->timer);
		2051
		2052	ev_start (EV_A_ (W)w, 1);
		2053	}
		2054
		2055	void
		2056	ev_stat_stop (EV_P_ ev_stat *w)
		2057	{
		2058	clear_pending (EV_A_ (W)w);
		2059	if (expect_false (!ev_is_active (w)))
		2060	return;
		2061
		2062	#if EV_USE_INOTIFY
		2063	infy_del (EV_A_ w);
		2064	#endif
		2065	ev_timer_stop (EV_A_ &w->timer);
		2066
		2067	ev_stop (EV_A_ (W)w);
		2068	}
		2069	#endif
		2070
		2071	#if EV_IDLE_ENABLE
		2072	void
		2073	ev_idle_start (EV_P_ ev_idle *w)
		2074	{
		2075	if (expect_false (ev_is_active (w)))
		2076	return;
		2077
		2078	pri_adjust (EV_A_ (W)w);
		2079
		2080	{
		2081	int active = ++idlecnt [ABSPRI (w)];
		2082
		2083	++idleall;
		2084	ev_start (EV_A_ (W)w, active);
		2085
		2086	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2087	idles [ABSPRI (w)][active - 1] = w;
		2088	}
		2089	}
		2090
		2091	void
		2092	ev_idle_stop (EV_P_ ev_idle *w)
		2093	{
		2094	clear_pending (EV_A_ (W)w);
		2095	if (expect_false (!ev_is_active (w)))
		2096	return;
		2097
		2098	{
		2099	int active = ((W)w)->active;
		2100
		2101	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2102	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2103
		2104	ev_stop (EV_A_ (W)w);
		2105	--idleall;
		2106	}
		2107	}
		2108	#endif
		2109
		2110	void
843	void evprepare_start (struct ev_prepare *w)	2111	ev_prepare_start (EV_P_ ev_prepare *w)
844	{	2112	{
845	if (ev_is_active (w))	2113	if (expect_false (ev_is_active (w)))
846	return;	2114	return;
847		2115
848	ev_start ((W)w, ++preparecnt);	2116	ev_start (EV_A_ (W)w, ++preparecnt);
849	array_needsize (prepares, preparemax, preparecnt, );	2117	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
850	prepares [preparecnt - 1] = w;	2118	prepares [preparecnt - 1] = w;
851	}	2119	}
852		2120
		2121	void
853	void evprepare_stop (struct ev_prepare *w)	2122	ev_prepare_stop (EV_P_ ev_prepare *w)
854	{	2123	{
855	ev_clear ((W)w);	2124	clear_pending (EV_A_ (W)w);
856	if (ev_is_active (w))	2125	if (expect_false (!ev_is_active (w)))
857	return;	2126	return;
858		2127
		2128	{
		2129	int active = ((W)w)->active;
859	prepares [w->active - 1] = prepares [--preparecnt];	2130	prepares [active - 1] = prepares [--preparecnt];
		2131	((W)prepares [active - 1])->active = active;
		2132	}
		2133
860	ev_stop ((W)w);	2134	ev_stop (EV_A_ (W)w);
861	}	2135	}
862		2136
		2137	void
863	void evcheck_start (struct ev_check *w)	2138	ev_check_start (EV_P_ ev_check *w)
864	{	2139	{
865	if (ev_is_active (w))	2140	if (expect_false (ev_is_active (w)))
866	return;	2141	return;
867		2142
868	ev_start ((W)w, ++checkcnt);	2143	ev_start (EV_A_ (W)w, ++checkcnt);
869	array_needsize (checks, checkmax, checkcnt, );	2144	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
870	checks [checkcnt - 1] = w;	2145	checks [checkcnt - 1] = w;
871	}	2146	}
872		2147
		2148	void
873	void evcheck_stop (struct ev_check *w)	2149	ev_check_stop (EV_P_ ev_check *w)
874	{	2150	{
875	ev_clear ((W)w);	2151	clear_pending (EV_A_ (W)w);
876	if (ev_is_active (w))	2152	if (expect_false (!ev_is_active (w)))
877	return;	2153	return;
878		2154
		2155	{
		2156	int active = ((W)w)->active;
879	checks [w->active - 1] = checks [--checkcnt];	2157	checks [active - 1] = checks [--checkcnt];
		2158	((W)checks [active - 1])->active = active;
		2159	}
		2160
880	ev_stop ((W)w);	2161	ev_stop (EV_A_ (W)w);
881	}	2162	}
		2163
		2164	#if EV_EMBED_ENABLE
		2165	void noinline
		2166	ev_embed_sweep (EV_P_ ev_embed *w)
		2167	{
		2168	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2169	}
		2170
		2171	static void
		2172	embed_cb (EV_P_ ev_io *io, int revents)
		2173	{
		2174	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2175
		2176	if (ev_cb (w))
		2177	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2178	else
		2179	ev_embed_sweep (loop, w);
		2180	}
		2181
		2182	void
		2183	ev_embed_start (EV_P_ ev_embed *w)
		2184	{
		2185	if (expect_false (ev_is_active (w)))
		2186	return;
		2187
		2188	{
		2189	struct ev_loop *loop = w->loop;
		2190	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2191	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2192	}
		2193
		2194	ev_set_priority (&w->io, ev_priority (w));
		2195	ev_io_start (EV_A_ &w->io);
		2196
		2197	ev_start (EV_A_ (W)w, 1);
		2198	}
		2199
		2200	void
		2201	ev_embed_stop (EV_P_ ev_embed *w)
		2202	{
		2203	clear_pending (EV_A_ (W)w);
		2204	if (expect_false (!ev_is_active (w)))
		2205	return;
		2206
		2207	ev_io_stop (EV_A_ &w->io);
		2208
		2209	ev_stop (EV_A_ (W)w);
		2210	}
		2211	#endif
		2212
		2213	#if EV_FORK_ENABLE
		2214	void
		2215	ev_fork_start (EV_P_ ev_fork *w)
		2216	{
		2217	if (expect_false (ev_is_active (w)))
		2218	return;
		2219
		2220	ev_start (EV_A_ (W)w, ++forkcnt);
		2221	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2222	forks [forkcnt - 1] = w;
		2223	}
		2224
		2225	void
		2226	ev_fork_stop (EV_P_ ev_fork *w)
		2227	{
		2228	clear_pending (EV_A_ (W)w);
		2229	if (expect_false (!ev_is_active (w)))
		2230	return;
		2231
		2232	{
		2233	int active = ((W)w)->active;
		2234	forks [active - 1] = forks [--forkcnt];
		2235	((W)forks [active - 1])->active = active;
		2236	}
		2237
		2238	ev_stop (EV_A_ (W)w);
		2239	}
		2240	#endif
882		2241
883	/*****************************************************************************/	2242	/*****************************************************************************/
884		2243
885	struct ev_once	2244	struct ev_once
886	{	2245	{
887	struct ev_io io;	2246	ev_io io;
888	struct ev_timer to;	2247	ev_timer to;
889	void (*cb)(int revents, void *arg);	2248	void (*cb)(int revents, void *arg);
890	void *arg;	2249	void *arg;
891	};	2250	};
892		2251
893	static void	2252	static void
894	once_cb (struct ev_once *once, int revents)	2253	once_cb (EV_P_ struct ev_once *once, int revents)
895	{	2254	{
896	void (*cb)(int revents, void *arg) = once->cb;	2255	void (*cb)(int revents, void *arg) = once->cb;
897	void *arg = once->arg;	2256	void *arg = once->arg;
898		2257
899	evio_stop (&once->io);	2258	ev_io_stop (EV_A_ &once->io);
900	evtimer_stop (&once->to);	2259	ev_timer_stop (EV_A_ &once->to);
901	free (once);	2260	ev_free (once);
902		2261
903	cb (revents, arg);	2262	cb (revents, arg);
904	}	2263	}
905		2264
906	static void	2265	static void
907	once_cb_io (struct ev_io *w, int revents)	2266	once_cb_io (EV_P_ ev_io *w, int revents)
908	{	2267	{
909	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2268	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
910	}	2269	}
911		2270
912	static void	2271	static void
913	once_cb_to (struct ev_timer *w, int revents)	2272	once_cb_to (EV_P_ ev_timer *w, int revents)
914	{	2273	{
915	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2274	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
916	}	2275	}
917		2276
918	void	2277	void
919	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2278	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
920	{	2279	{
921	struct ev_once *once = malloc (sizeof (struct ev_once));	2280	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
922		2281
923	if (!once)	2282	if (expect_false (!once))
924	cb (EV_ERROR, arg);	2283	{
925	else	2284	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		2285	return;
926	{	2286	}
		2287
927	once->cb = cb;	2288	once->cb = cb;
928	once->arg = arg;	2289	once->arg = arg;
929		2290
930	evw_init (&once->io, once_cb_io);	2291	ev_init (&once->io, once_cb_io);
931
932	if (fd >= 0)	2292	if (fd >= 0)
933	{	2293	{
934	evio_set (&once->io, fd, events);	2294	ev_io_set (&once->io, fd, events);
935	evio_start (&once->io);	2295	ev_io_start (EV_A_ &once->io);
936	}	2296	}
937		2297
938	evw_init (&once->to, once_cb_to);	2298	ev_init (&once->to, once_cb_to);
939
940	if (timeout >= 0.)	2299	if (timeout >= 0.)
941	{	2300	{
942	evtimer_set (&once->to, timeout, 0.);	2301	ev_timer_set (&once->to, timeout, 0.);
943	evtimer_start (&once->to);	2302	ev_timer_start (EV_A_ &once->to);
944	}
945	}
946	}
947
948	/*****************************************************************************/
949
950	#if 0
951
952	struct ev_io wio;
953
954	static void
955	sin_cb (struct ev_io *w, int revents)
956	{
957	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
958	}
959
960	static void
961	ocb (struct ev_timer *w, int revents)
962	{
963	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
964	evtimer_stop (w);
965	evtimer_start (w);
966	}
967
968	static void
969	scb (struct ev_signal *w, int revents)
970	{
971	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
972	evio_stop (&wio);
973	evio_start (&wio);
974	}
975
976	static void
977	gcb (struct ev_signal *w, int revents)
978	{
979	fprintf (stderr, "generic %x\n", revents);
980
981	}
982
983	int main (void)
984	{
985	ev_init (0);
986
987	evio_init (&wio, sin_cb, 0, EV_READ);
988	evio_start (&wio);
989
990	struct ev_timer t[10000];
991
992	#if 0
993	int i;
994	for (i = 0; i < 10000; ++i)
995	{	2303	}
996	struct ev_timer *w = t + i;
997	evw_init (w, ocb, i);
998	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
999	evtimer_start (w);
1000	if (drand48 () < 0.5)
1001	evtimer_stop (w);
1002	}
1003	#endif
1004
1005	struct ev_timer t1;
1006	evtimer_init (&t1, ocb, 5, 10);
1007	evtimer_start (&t1);
1008
1009	struct ev_signal sig;
1010	evsignal_init (&sig, scb, SIGQUIT);
1011	evsignal_start (&sig);
1012
1013	struct ev_check cw;
1014	evcheck_init (&cw, gcb);
1015	evcheck_start (&cw);
1016
1017	struct ev_idle iw;
1018	evidle_init (&iw, gcb);
1019	evidle_start (&iw);
1020
1021	ev_loop (0);
1022
1023	return 0;
1024	}	2304	}
1025		2305
		2306	#ifdef __cplusplus
		2307	}
1026	#endif	2308	#endif
1027		2309
1028
1029
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