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Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.185 by root, Fri Dec 14 18:22:30 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
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
29	#if EV_USE_CONFIG_H	37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
30	# include "config.h"	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
31	#endif	107	#endif
32		108
33	#include <math.h>	109	#include <math.h>
34	#include <stdlib.h>	110	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	111	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	112	#include <stddef.h>
39		113
40	#include <stdio.h>	114	#include <stdio.h>
41		115
42	#include <assert.h>	116	#include <assert.h>
43	#include <errno.h>	117	#include <errno.h>
44	#include <sys/types.h>	118	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	119	#include <time.h>
48		120
		121	#include <signal.h>
		122
		123	#ifdef EV_H
		124	# include EV_H
		125	#else
		126	# include "ev.h"
		127	#endif
		128
		129	#ifndef _WIN32
		130	# include <sys/time.h>
		131	# include <sys/wait.h>
		132	# include <unistd.h>
		133	#else
		134	# define WIN32_LEAN_AND_MEAN
		135	# include <windows.h>
		136	# ifndef EV_SELECT_IS_WINSOCKET
		137	# define EV_SELECT_IS_WINSOCKET 1
		138	# endif
		139	#endif
		140
		141	/**/
		142
49	#ifndef EV_USE_MONOTONIC	143	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	144	# define EV_USE_MONOTONIC 0
52	# endif	145	#endif
		146
		147	#ifndef EV_USE_REALTIME
		148	# define EV_USE_REALTIME 0
53	#endif	149	#endif
54		150
55	#ifndef EV_USE_SELECT	151	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	152	# define EV_USE_SELECT 1
57	#endif	153	#endif
58		154
		155	#ifndef EV_USE_POLL
		156	# ifdef _WIN32
		157	# define EV_USE_POLL 0
		158	# else
		159	# define EV_USE_POLL 1
		160	# endif
		161	#endif
		162
59	#ifndef EV_USE_EPOLL	163	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	164	# define EV_USE_EPOLL 0
61	#endif	165	#endif
62		166
		167	#ifndef EV_USE_KQUEUE
		168	# define EV_USE_KQUEUE 0
		169	#endif
		170
		171	#ifndef EV_USE_PORT
		172	# define EV_USE_PORT 0
		173	#endif
		174
		175	#ifndef EV_USE_INOTIFY
		176	# define EV_USE_INOTIFY 0
		177	#endif
		178
		179	#ifndef EV_PID_HASHSIZE
		180	# if EV_MINIMAL
		181	# define EV_PID_HASHSIZE 1
		182	# else
		183	# define EV_PID_HASHSIZE 16
		184	# endif
		185	#endif
		186
		187	#ifndef EV_INOTIFY_HASHSIZE
		188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
		192	# endif
		193	#endif
		194
		195	/**/
		196
		197	#ifndef CLOCK_MONOTONIC
		198	# undef EV_USE_MONOTONIC
		199	# define EV_USE_MONOTONIC 0
		200	#endif
		201
63	#ifndef CLOCK_REALTIME	202	#ifndef CLOCK_REALTIME
		203	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	204	# define EV_USE_REALTIME 0
65	#endif	205	#endif
66	#ifndef EV_USE_REALTIME	206
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	207	#if !EV_STAT_ENABLE
		208	# undef EV_USE_INOTIFY
		209	# define EV_USE_INOTIFY 0
68	#endif	210	#endif
		211
		212	#if EV_USE_INOTIFY
		213	# include <sys/inotify.h>
		214	#endif
		215
		216	#if EV_SELECT_IS_WINSOCKET
		217	# include <winsock.h>
		218	#endif
		219
		220	/**/
		221
		222	/*
		223	* This is used to avoid floating point rounding problems.
		224	* It is added to ev_rt_now when scheduling periodics
		225	* to ensure progress, time-wise, even when rounding
		226	* errors are against us.
		227	* This value is good at least till the year 4000.
		228	* Better solutions welcome.
		229	*/
		230	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
69		231
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	232	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	233	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	234	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
74		235
75	#include "ev.h"	236	#if __GNUC__ >= 4
		237	# define expect(expr,value) __builtin_expect ((expr),(value))
		238	# define noinline __attribute__ ((noinline))
		239	#else
		240	# define expect(expr,value) (expr)
		241	# define noinline
		242	# if __STDC_VERSION__ < 199901L
		243	# define inline
		244	# endif
		245	#endif
76		246
		247	#define expect_false(expr) expect ((expr) != 0, 0)
		248	#define expect_true(expr) expect ((expr) != 0, 1)
		249	#define inline_size static inline
		250
		251	#if EV_MINIMAL
		252	# define inline_speed static noinline
		253	#else
		254	# define inline_speed static inline
		255	#endif
		256
		257	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		258	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		259
		260	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		261	#define EMPTY2(a,b) /* used to suppress some warnings */
		262
77	typedef struct ev_watcher *W;	263	typedef ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	264	typedef ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	265	typedef ev_watcher_time *WT;
80		266
81	static ev_tstamp now, diff; /* monotonic clock */	267	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		268
		269	#ifdef _WIN32
		270	# include "ev_win32.c"
		271	#endif
		272
		273	/*****************************************************************************/
		274
		275	static void (*syserr_cb)(const char *msg);
		276
		277	void
		278	ev_set_syserr_cb (void (*cb)(const char *msg))
		279	{
		280	syserr_cb = cb;
		281	}
		282
		283	static void noinline
		284	syserr (const char *msg)
		285	{
		286	if (!msg)
		287	msg = "(libev) system error";
		288
		289	if (syserr_cb)
		290	syserr_cb (msg);
		291	else
		292	{
		293	perror (msg);
		294	abort ();
		295	}
		296	}
		297
		298	static void *(*alloc)(void *ptr, long size);
		299
		300	void
		301	ev_set_allocator (void *(*cb)(void *ptr, long size))
		302	{
		303	alloc = cb;
		304	}
		305
		306	inline_speed void *
		307	ev_realloc (void *ptr, long size)
		308	{
		309	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		310
		311	if (!ptr && size)
		312	{
		313	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		314	abort ();
		315	}
		316
		317	return ptr;
		318	}
		319
		320	#define ev_malloc(size) ev_realloc (0, (size))
		321	#define ev_free(ptr) ev_realloc ((ptr), 0)
		322
		323	/*****************************************************************************/
		324
		325	typedef struct
		326	{
		327	WL head;
		328	unsigned char events;
		329	unsigned char reify;
		330	#if EV_SELECT_IS_WINSOCKET
		331	SOCKET handle;
		332	#endif
		333	} ANFD;
		334
		335	typedef struct
		336	{
		337	W w;
		338	int events;
		339	} ANPENDING;
		340
		341	#if EV_USE_INOTIFY
		342	typedef struct
		343	{
		344	WL head;
		345	} ANFS;
		346	#endif
		347
		348	#if EV_MULTIPLICITY
		349
		350	struct ev_loop
		351	{
		352	ev_tstamp ev_rt_now;
		353	#define ev_rt_now ((loop)->ev_rt_now)
		354	#define VAR(name,decl) decl;
		355	#include "ev_vars.h"
		356	#undef VAR
		357	};
		358	#include "ev_wrap.h"
		359
		360	static struct ev_loop default_loop_struct;
		361	struct ev_loop *ev_default_loop_ptr;
		362
		363	#else
		364
82	ev_tstamp ev_now;	365	ev_tstamp ev_rt_now;
83	int ev_method;	366	#define VAR(name,decl) static decl;
		367	#include "ev_vars.h"
		368	#undef VAR
84		369
85	static int have_monotonic; /* runtime */	370	static int ev_default_loop_ptr;
86		371
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	372	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		373
91	/*****************************************************************************/	374	/*****************************************************************************/
92		375
93	ev_tstamp	376	ev_tstamp
94	ev_time (void)	377	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	385	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	386	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	387	#endif
105	}	388	}
106		389
107	static ev_tstamp	390	ev_tstamp inline_size
108	get_clock (void)	391	get_clock (void)
109	{	392	{
110	#if EV_USE_MONOTONIC	393	#if EV_USE_MONOTONIC
111	if (have_monotonic)	394	if (expect_true (have_monotonic))
112	{	395	{
113	struct timespec ts;	396	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	397	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	398	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	399	}
117	#endif	400	#endif
118		401
119	return ev_time ();	402	return ev_time ();
120	}	403	}
121		404
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	405	#if EV_MULTIPLICITY
		406	ev_tstamp
		407	ev_now (EV_P)
		408	{
		409	return ev_rt_now;
		410	}
		411	#endif
123		412
		413	int inline_size
		414	array_nextsize (int elem, int cur, int cnt)
		415	{
		416	int ncur = cur + 1;
		417
		418	do
		419	ncur <<= 1;
		420	while (cnt > ncur);
		421
		422	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		423	if (elem * ncur > 4096)
		424	{
		425	ncur *= elem;
		426	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		427	ncur = ncur - sizeof (void *) * 4;
		428	ncur /= elem;
		429	}
		430
		431	return ncur;
		432	}
		433
		434	static noinline void *
		435	array_realloc (int elem, void *base, int *cur, int cnt)
		436	{
		437	*cur = array_nextsize (elem, *cur, cnt);
		438	return ev_realloc (base, elem * *cur);
		439	}
		440
124	#define array_needsize(base,cur,cnt,init) \	441	#define array_needsize(type,base,cur,cnt,init) \
125	if ((cnt) > cur) \	442	if (expect_false ((cnt) > (cur))) \
126	{ \	443	{ \
127	int newcnt = cur; \	444	int ocur_ = (cur); \
128	do \	445	(base) = (type *)array_realloc \
129	{ \	446	(sizeof (type), (base), &(cur), (cnt)); \
130	newcnt = array_roundsize (base, newcnt << 1); \	447	init ((base) + (ocur_), (cur) - ocur_); \
131	} \	448	}
132	while ((cnt) > newcnt); \	449
		450	#if 0
		451	#define array_slim(type,stem) \
		452	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
133	\	453	{ \
134	base = realloc (base, sizeof (*base) * (newcnt)); \	454	stem ## max = array_roundsize (stem ## cnt >> 1); \
135	init (base + cur, newcnt - cur); \	455	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
136	cur = newcnt; \	456	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
137	}	457	}
		458	#endif
		459
		460	#define array_free(stem, idx) \
		461	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
138		462
139	/*****************************************************************************/	463	/*****************************************************************************/
140		464
141	typedef struct	465	void noinline
		466	ev_feed_event (EV_P_ void *w, int revents)
142	{	467	{
143	struct ev_io *head;	468	W w_ = (W)w;
144	int events;	469	int pri = ABSPRI (w_);
145	} ANFD;
146		470
147	static ANFD *anfds;	471	if (expect_false (w_->pending))
148	static int anfdmax;	472	pendings [pri][w_->pending - 1].events |= revents;
		473	else
		474	{
		475	w_->pending = ++pendingcnt [pri];
		476	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		477	pendings [pri][w_->pending - 1].w = w_;
		478	pendings [pri][w_->pending - 1].events = revents;
		479	}
		480	}
149		481
150	static void	482	void inline_speed
		483	queue_events (EV_P_ W *events, int eventcnt, int type)
		484	{
		485	int i;
		486
		487	for (i = 0; i < eventcnt; ++i)
		488	ev_feed_event (EV_A_ events [i], type);
		489	}
		490
		491	/*****************************************************************************/
		492
		493	void inline_size
151	anfds_init (ANFD *base, int count)	494	anfds_init (ANFD *base, int count)
152	{	495	{
153	while (count--)	496	while (count--)
154	{	497	{
155	base->head = 0;	498	base->head = 0;
156	base->events = EV_NONE;	499	base->events = EV_NONE;
		500	base->reify = 0;
		501
157	++base;	502	++base;
158	}	503	}
159	}	504	}
160		505
161	typedef struct	506	void inline_speed
162	{
163	W w;
164	int events;
165	} ANPENDING;
166
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void
171	event (W w, int events)
172	{
173	w->pending = ++pendingcnt;
174	array_needsize (pendings, pendingmax, pendingcnt, );
175	pendings [pendingcnt - 1].w = w;
176	pendings [pendingcnt - 1].events = events;
177	}
178
179	static void
180	queue_events (W *events, int eventcnt, int type)
181	{
182	int i;
183
184	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);
186	}
187
188	static void
189	fd_event (int fd, int events)	507	fd_event (EV_P_ int fd, int revents)
190	{	508	{
191	ANFD *anfd = anfds + fd;	509	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	510	ev_io *w;
193		511
194	for (w = anfd->head; w; w = w->next)	512	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
195	{	513	{
196	int ev = w->events & events;	514	int ev = w->events & revents;
197		515
198	if (ev)	516	if (ev)
199	event ((W)w, ev);	517	ev_feed_event (EV_A_ (W)w, ev);
200	}	518	}
201	}	519	}
202		520
203	/*****************************************************************************/	521	void
		522	ev_feed_fd_event (EV_P_ int fd, int revents)
		523	{
		524	if (fd >= 0 && fd < anfdmax)
		525	fd_event (EV_A_ fd, revents);
		526	}
204		527
205	static int *fdchanges;	528	void inline_size
206	static int fdchangemax, fdchangecnt;	529	fd_reify (EV_P)
207
208	static void
209	fd_reify (void)
210	{	530	{
211	int i;	531	int i;
212		532
213	for (i = 0; i < fdchangecnt; ++i)	533	for (i = 0; i < fdchangecnt; ++i)
214	{	534	{
215	int fd = fdchanges [i];	535	int fd = fdchanges [i];
216	ANFD *anfd = anfds + fd;	536	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	537	ev_io *w;
218		538
219	int events = 0;	539	unsigned char events = 0;
220		540
221	for (w = anfd->head; w; w = w->next)	541	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
222	events |= w->events;	542	events |= (unsigned char)w->events;
223		543
224	anfd->events &= ~EV_REIFY;	544	#if EV_SELECT_IS_WINSOCKET
225		545	if (events)
226	if (anfd->events != events)
227	{	546	{
228	method_modify (fd, anfd->events, events);	547	unsigned long argp;
229	anfd->events = events;	548	anfd->handle = _get_osfhandle (fd);
		549	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
230	}	550	}
		551	#endif
		552
		553	{
		554	unsigned char o_events = anfd->events;
		555	unsigned char o_reify = anfd->reify;
		556
		557	anfd->reify = 0;
		558	anfd->events = events;
		559
		560	if (o_events != events || o_reify & EV_IOFDSET)
		561	backend_modify (EV_A_ fd, o_events, events);
		562	}
231	}	563	}
232		564
233	fdchangecnt = 0;	565	fdchangecnt = 0;
234	}	566	}
235		567
236	static void	568	void inline_size
237	fd_change (int fd)	569	fd_change (EV_P_ int fd, int flags)
238	{	570	{
239	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	571	unsigned char reify = anfds [fd].reify;
240	return;	572	anfds [fd].reify |= flags;
241		573
242	anfds [fd].events |= EV_REIFY;	574	if (expect_true (!reify))
243		575	{
244	++fdchangecnt;	576	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	577	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
246	fdchanges [fdchangecnt - 1] = fd;	578	fdchanges [fdchangecnt - 1] = fd;
		579	}
		580	}
		581
		582	void inline_speed
		583	fd_kill (EV_P_ int fd)
		584	{
		585	ev_io *w;
		586
		587	while ((w = (ev_io *)anfds [fd].head))
		588	{
		589	ev_io_stop (EV_A_ w);
		590	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		591	}
		592	}
		593
		594	int inline_size
		595	fd_valid (int fd)
		596	{
		597	#ifdef _WIN32
		598	return _get_osfhandle (fd) != -1;
		599	#else
		600	return fcntl (fd, F_GETFD) != -1;
		601	#endif
247	}	602	}
248		603
249	/* called on EBADF to verify fds */	604	/* called on EBADF to verify fds */
250	static void	605	static void noinline
251	fd_recheck (void)	606	fd_ebadf (EV_P)
252	{	607	{
253	int fd;	608	int fd;
254		609
255	for (fd = 0; fd < anfdmax; ++fd)	610	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	611	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	612	if (!fd_valid (fd) == -1 && errno == EBADF)
258	while (anfds [fd].head)	613	fd_kill (EV_A_ fd);
		614	}
		615
		616	/* called on ENOMEM in select/poll to kill some fds and retry */
		617	static void noinline
		618	fd_enomem (EV_P)
		619	{
		620	int fd;
		621
		622	for (fd = anfdmax; fd--; )
		623	if (anfds [fd].events)
259	{	624	{
260	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	625	fd_kill (EV_A_ fd);
261	ev_io_stop (anfds [fd].head);	626	return;
262	}	627	}
		628	}
		629
		630	/* usually called after fork if backend needs to re-arm all fds from scratch */
		631	static void noinline
		632	fd_rearm_all (EV_P)
		633	{
		634	int fd;
		635
		636	for (fd = 0; fd < anfdmax; ++fd)
		637	if (anfds [fd].events)
		638	{
		639	anfds [fd].events = 0;
		640	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		641	}
263	}	642	}
264		643
265	/*****************************************************************************/	644	/*****************************************************************************/
266		645
267	static struct ev_timer **timers;	646	void inline_speed
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void
274	upheap (WT *timers, int k)	647	upheap (WT *heap, int k)
275	{	648	{
276	WT w = timers [k];	649	WT w = heap [k];
277		650
278	while (k && timers [k >> 1]->at > w->at)	651	while (k)
279	{
280	timers [k] = timers [k >> 1];
281	timers [k]->active = k + 1;
282	k >>= 1;
283	}	652	{
284
285	timers [k] = w;
286	timers [k]->active = k + 1;
287
288	}
289
290	static void
291	downheap (WT *timers, int N, int k)
292	{
293	WT w = timers [k];
294
295	while (k < (N >> 1))
296	{
297	int j = k << 1;	653	int p = (k - 1) >> 1;
298		654
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	655	if (heap [p]->at <= w->at)
300	++j;
301
302	if (w->at <= timers [j]->at)
303	break;	656	break;
304		657
305	timers [k] = timers [j];	658	heap [k] = heap [p];
306	timers [k]->active = k + 1;	659	((W)heap [k])->active = k + 1;
307	k = j;	660	k = p;
		661	}
		662
		663	heap [k] = w;
		664	((W)heap [k])->active = k + 1;
		665	}
		666
		667	void inline_speed
		668	downheap (WT *heap, int N, int k)
		669	{
		670	WT w = heap [k];
		671
		672	for (;;)
308	}	673	{
		674	int c = (k << 1) + 1;
309		675
		676	if (c >= N)
		677	break;
		678
		679	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		680	? 1 : 0;
		681
		682	if (w->at <= heap [c]->at)
		683	break;
		684
		685	heap [k] = heap [c];
		686	((W)heap [k])->active = k + 1;
		687
		688	k = c;
		689	}
		690
310	timers [k] = w;	691	heap [k] = w;
311	timers [k]->active = k + 1;	692	((W)heap [k])->active = k + 1;
		693	}
		694
		695	void inline_size
		696	adjustheap (WT *heap, int N, int k)
		697	{
		698	upheap (heap, k);
		699	downheap (heap, N, k);
312	}	700	}
313		701
314	/*****************************************************************************/	702	/*****************************************************************************/
315		703
316	typedef struct	704	typedef struct
317	{	705	{
318	struct ev_signal *head;	706	WL head;
319	sig_atomic_t gotsig;	707	sig_atomic_t volatile gotsig;
320	} ANSIG;	708	} ANSIG;
321		709
322	static ANSIG *signals;	710	static ANSIG *signals;
323	static int signalmax;	711	static int signalmax;
324		712
325	static int sigpipe [2];	713	static int sigpipe [2];
326	static sig_atomic_t gotsig;	714	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	715	static ev_io sigev;
328		716
329	static void	717	void inline_size
330	signals_init (ANSIG *base, int count)	718	signals_init (ANSIG *base, int count)
331	{	719	{
332	while (count--)	720	while (count--)
333	{	721	{
334	base->head = 0;	722	base->head = 0;
335	base->gotsig = 0;	723	base->gotsig = 0;
		724
336	++base;	725	++base;
337	}	726	}
338	}	727	}
339		728
340	static void	729	static void
341	sighandler (int signum)	730	sighandler (int signum)
342	{	731	{
		732	#if _WIN32
		733	signal (signum, sighandler);
		734	#endif
		735
343	signals [signum - 1].gotsig = 1;	736	signals [signum - 1].gotsig = 1;
344		737
345	if (!gotsig)	738	if (!gotsig)
346	{	739	{
		740	int old_errno = errno;
347	gotsig = 1;	741	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	742	write (sigpipe [1], &signum, 1);
		743	errno = old_errno;
349	}	744	}
		745	}
		746
		747	void noinline
		748	ev_feed_signal_event (EV_P_ int signum)
		749	{
		750	WL w;
		751
		752	#if EV_MULTIPLICITY
		753	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		754	#endif
		755
		756	--signum;
		757
		758	if (signum < 0 || signum >= signalmax)
		759	return;
		760
		761	signals [signum].gotsig = 0;
		762
		763	for (w = signals [signum].head; w; w = w->next)
		764	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
350	}	765	}
351		766
352	static void	767	static void
353	sigcb (struct ev_io *iow, int revents)	768	sigcb (EV_P_ ev_io *iow, int revents)
354	{	769	{
355	struct ev_signal *w;
356	int sig;	770	int signum;
357		771
		772	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	773	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		774
361	for (sig = signalmax; sig--; )	775	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	776	if (signals [signum].gotsig)
		777	ev_feed_signal_event (EV_A_ signum + 1);
		778	}
		779
		780	void inline_speed
		781	fd_intern (int fd)
		782	{
		783	#ifdef _WIN32
		784	int arg = 1;
		785	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		786	#else
		787	fcntl (fd, F_SETFD, FD_CLOEXEC);
		788	fcntl (fd, F_SETFL, O_NONBLOCK);
		789	#endif
		790	}
		791
		792	static void noinline
		793	siginit (EV_P)
		794	{
		795	fd_intern (sigpipe [0]);
		796	fd_intern (sigpipe [1]);
		797
		798	ev_io_set (&sigev, sigpipe [0], EV_READ);
		799	ev_io_start (EV_A_ &sigev);
		800	ev_unref (EV_A); /* child watcher should not keep loop alive */
		801	}
		802
		803	/*****************************************************************************/
		804
		805	static WL childs [EV_PID_HASHSIZE];
		806
		807	#ifndef _WIN32
		808
		809	static ev_signal childev;
		810
		811	void inline_speed
		812	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		813	{
		814	ev_child *w;
		815
		816	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		817	if (w->pid == pid || !w->pid)
363	{	818	{
364	signals [sig].gotsig = 0;	819	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
365		820	w->rpid = pid;
366	for (w = signals [sig].head; w; w = w->next)	821	w->rstatus = status;
367	event ((W)w, EV_SIGNAL);	822	ev_feed_event (EV_A_ (W)w, EV_CHILD);
368	}	823	}
369	}	824	}
370
371	static void
372	siginit (void)
373	{
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376
377	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
380
381	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);
383	}
384
385	/*****************************************************************************/
386
387	static struct ev_idle **idles;
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397
398	static struct ev_child *childs [PID_HASHSIZE];
399	static struct ev_signal childev;
400		825
401	#ifndef WCONTINUED	826	#ifndef WCONTINUED
402	# define WCONTINUED 0	827	# define WCONTINUED 0
403	#endif	828	#endif
404		829
405	static void	830	static void
406	childcb (struct ev_signal *sw, int revents)	831	childcb (EV_P_ ev_signal *sw, int revents)
407	{	832	{
408	struct ev_child *w;
409	int pid, status;	833	int pid, status;
410		834
		835	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	836	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	837	if (!WCONTINUED
413	if (w->pid == pid || w->pid == -1)	838	|| errno != EINVAL
414	{	839	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
415	w->status = status;	840	return;
416	event ((W)w, EV_CHILD);	841
417	}	842	/* make sure we are called again until all childs have been reaped */
		843	/* we need to do it this way so that the callback gets called before we continue */
		844	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		845
		846	child_reap (EV_A_ sw, pid, pid, status);
		847	if (EV_PID_HASHSIZE > 1)
		848	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
418	}	849	}
		850
		851	#endif
419		852
420	/*****************************************************************************/	853	/*****************************************************************************/
421		854
		855	#if EV_USE_PORT
		856	# include "ev_port.c"
		857	#endif
		858	#if EV_USE_KQUEUE
		859	# include "ev_kqueue.c"
		860	#endif
422	#if EV_USE_EPOLL	861	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	862	# include "ev_epoll.c"
424	#endif	863	#endif
		864	#if EV_USE_POLL
		865	# include "ev_poll.c"
		866	#endif
425	#if EV_USE_SELECT	867	#if EV_USE_SELECT
426	# include "ev_select.c"	868	# include "ev_select.c"
427	#endif	869	#endif
428		870
429	int	871	int
…		…
436	ev_version_minor (void)	878	ev_version_minor (void)
437	{	879	{
438	return EV_VERSION_MINOR;	880	return EV_VERSION_MINOR;
439	}	881	}
440		882
441	int ev_init (int flags)	883	/* return true if we are running with elevated privileges and should ignore env variables */
		884	int inline_size
		885	enable_secure (void)
442	{	886	{
443	if (!ev_method)	887	#ifdef _WIN32
		888	return 0;
		889	#else
		890	return getuid () != geteuid ()
		891	|| getgid () != getegid ();
		892	#endif
		893	}
		894
		895	unsigned int
		896	ev_supported_backends (void)
		897	{
		898	unsigned int flags = 0;
		899
		900	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		901	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		902	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		903	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		904	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		905
		906	return flags;
		907	}
		908
		909	unsigned int
		910	ev_recommended_backends (void)
		911	{
		912	unsigned int flags = ev_supported_backends ();
		913
		914	#ifndef __NetBSD__
		915	/* kqueue is borked on everything but netbsd apparently */
		916	/* it usually doesn't work correctly on anything but sockets and pipes */
		917	flags &= ~EVBACKEND_KQUEUE;
		918	#endif
		919	#ifdef __APPLE__
		920	// flags &= ~EVBACKEND_KQUEUE; for documentation
		921	flags &= ~EVBACKEND_POLL;
		922	#endif
		923
		924	return flags;
		925	}
		926
		927	unsigned int
		928	ev_embeddable_backends (void)
		929	{
		930	return EVBACKEND_EPOLL
		931	| EVBACKEND_KQUEUE
		932	| EVBACKEND_PORT;
		933	}
		934
		935	unsigned int
		936	ev_backend (EV_P)
		937	{
		938	return backend;
		939	}
		940
		941	unsigned int
		942	ev_loop_count (EV_P)
		943	{
		944	return loop_count;
		945	}
		946
		947	static void noinline
		948	loop_init (EV_P_ unsigned int flags)
		949	{
		950	if (!backend)
444	{	951	{
445	#if EV_USE_MONOTONIC	952	#if EV_USE_MONOTONIC
446	{	953	{
447	struct timespec ts;	954	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	955	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	956	have_monotonic = 1;
450	}	957	}
451	#endif	958	#endif
452		959
453	ev_now = ev_time ();	960	ev_rt_now = ev_time ();
454	now = get_clock ();	961	mn_now = get_clock ();
		962	now_floor = mn_now;
455	diff = ev_now - now;	963	rtmn_diff = ev_rt_now - mn_now;
456		964
457	if (pipe (sigpipe))	965	/* pid check not overridable via env */
458	return 0;	966	#ifndef _WIN32
		967	if (flags & EVFLAG_FORKCHECK)
		968	curpid = getpid ();
		969	#endif
459		970
460	ev_method = EVMETHOD_NONE;	971	if (!(flags & EVFLAG_NOENV)
		972	&& !enable_secure ()
		973	&& getenv ("LIBEV_FLAGS"))
		974	flags = atoi (getenv ("LIBEV_FLAGS"));
		975
		976	if (!(flags & 0x0000ffffUL))
		977	flags |= ev_recommended_backends ();
		978
		979	backend = 0;
		980	backend_fd = -1;
		981	#if EV_USE_INOTIFY
		982	fs_fd = -2;
		983	#endif
		984
		985	#if EV_USE_PORT
		986	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		987	#endif
		988	#if EV_USE_KQUEUE
		989	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		990	#endif
461	#if EV_USE_EPOLL	991	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	992	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		993	#endif
		994	#if EV_USE_POLL
		995	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
463	#endif	996	#endif
464	#if EV_USE_SELECT	997	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	998	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
466	#endif	999	#endif
467		1000
468	if (ev_method)	1001	ev_init (&sigev, sigcb);
		1002	ev_set_priority (&sigev, EV_MAXPRI);
		1003	}
		1004	}
		1005
		1006	static void noinline
		1007	loop_destroy (EV_P)
		1008	{
		1009	int i;
		1010
		1011	#if EV_USE_INOTIFY
		1012	if (fs_fd >= 0)
		1013	close (fs_fd);
		1014	#endif
		1015
		1016	if (backend_fd >= 0)
		1017	close (backend_fd);
		1018
		1019	#if EV_USE_PORT
		1020	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1021	#endif
		1022	#if EV_USE_KQUEUE
		1023	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1024	#endif
		1025	#if EV_USE_EPOLL
		1026	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1027	#endif
		1028	#if EV_USE_POLL
		1029	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1030	#endif
		1031	#if EV_USE_SELECT
		1032	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1033	#endif
		1034
		1035	for (i = NUMPRI; i--; )
		1036	{
		1037	array_free (pending, [i]);
		1038	#if EV_IDLE_ENABLE
		1039	array_free (idle, [i]);
		1040	#endif
		1041	}
		1042
		1043	/* have to use the microsoft-never-gets-it-right macro */
		1044	array_free (fdchange, EMPTY);
		1045	array_free (timer, EMPTY);
		1046	#if EV_PERIODIC_ENABLE
		1047	array_free (periodic, EMPTY);
		1048	#endif
		1049	array_free (prepare, EMPTY);
		1050	array_free (check, EMPTY);
		1051
		1052	backend = 0;
		1053	}
		1054
		1055	void inline_size infy_fork (EV_P);
		1056
		1057	void inline_size
		1058	loop_fork (EV_P)
		1059	{
		1060	#if EV_USE_PORT
		1061	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1062	#endif
		1063	#if EV_USE_KQUEUE
		1064	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1065	#endif
		1066	#if EV_USE_EPOLL
		1067	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1068	#endif
		1069	#if EV_USE_INOTIFY
		1070	infy_fork (EV_A);
		1071	#endif
		1072
		1073	if (ev_is_active (&sigev))
		1074	{
		1075	/* default loop */
		1076
		1077	ev_ref (EV_A);
		1078	ev_io_stop (EV_A_ &sigev);
		1079	close (sigpipe [0]);
		1080	close (sigpipe [1]);
		1081
		1082	while (pipe (sigpipe))
		1083	syserr ("(libev) error creating pipe");
		1084
		1085	siginit (EV_A);
		1086	}
		1087
		1088	postfork = 0;
		1089	}
		1090
		1091	#if EV_MULTIPLICITY
		1092	struct ev_loop *
		1093	ev_loop_new (unsigned int flags)
		1094	{
		1095	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1096
		1097	memset (loop, 0, sizeof (struct ev_loop));
		1098
		1099	loop_init (EV_A_ flags);
		1100
		1101	if (ev_backend (EV_A))
		1102	return loop;
		1103
		1104	return 0;
		1105	}
		1106
		1107	void
		1108	ev_loop_destroy (EV_P)
		1109	{
		1110	loop_destroy (EV_A);
		1111	ev_free (loop);
		1112	}
		1113
		1114	void
		1115	ev_loop_fork (EV_P)
		1116	{
		1117	postfork = 1;
		1118	}
		1119
		1120	#endif
		1121
		1122	#if EV_MULTIPLICITY
		1123	struct ev_loop *
		1124	ev_default_loop_init (unsigned int flags)
		1125	#else
		1126	int
		1127	ev_default_loop (unsigned int flags)
		1128	#endif
		1129	{
		1130	if (sigpipe [0] == sigpipe [1])
		1131	if (pipe (sigpipe))
		1132	return 0;
		1133
		1134	if (!ev_default_loop_ptr)
		1135	{
		1136	#if EV_MULTIPLICITY
		1137	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1138	#else
		1139	ev_default_loop_ptr = 1;
		1140	#endif
		1141
		1142	loop_init (EV_A_ flags);
		1143
		1144	if (ev_backend (EV_A))
469	{	1145	{
470	ev_watcher_init (&sigev, sigcb);
471	siginit ();	1146	siginit (EV_A);
472		1147
		1148	#ifndef _WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	1149	ev_signal_init (&childev, childcb, SIGCHLD);
		1150	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	1151	ev_signal_start (EV_A_ &childev);
		1152	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1153	#endif
475	}	1154	}
		1155	else
		1156	ev_default_loop_ptr = 0;
476	}	1157	}
477		1158
478	return ev_method;	1159	return ev_default_loop_ptr;
		1160	}
		1161
		1162	void
		1163	ev_default_destroy (void)
		1164	{
		1165	#if EV_MULTIPLICITY
		1166	struct ev_loop *loop = ev_default_loop_ptr;
		1167	#endif
		1168
		1169	#ifndef _WIN32
		1170	ev_ref (EV_A); /* child watcher */
		1171	ev_signal_stop (EV_A_ &childev);
		1172	#endif
		1173
		1174	ev_ref (EV_A); /* signal watcher */
		1175	ev_io_stop (EV_A_ &sigev);
		1176
		1177	close (sigpipe [0]); sigpipe [0] = 0;
		1178	close (sigpipe [1]); sigpipe [1] = 0;
		1179
		1180	loop_destroy (EV_A);
		1181	}
		1182
		1183	void
		1184	ev_default_fork (void)
		1185	{
		1186	#if EV_MULTIPLICITY
		1187	struct ev_loop *loop = ev_default_loop_ptr;
		1188	#endif
		1189
		1190	if (backend)
		1191	postfork = 1;
479	}	1192	}
480		1193
481	/*****************************************************************************/	1194	/*****************************************************************************/
482		1195
483	void	1196	void
484	ev_prefork (void)	1197	ev_invoke (EV_P_ void *w, int revents)
485	{	1198	{
486	/* nop */	1199	EV_CB_INVOKE ((W)w, revents);
487	}	1200	}
488		1201
489	void	1202	void inline_speed
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif
502
503	ev_io_stop (&sigev);
504	close (sigpipe [0]);
505	close (sigpipe [1]);
506	pipe (sigpipe);
507	siginit ();
508	}
509
510	/*****************************************************************************/
511
512	static void
513	call_pending (void)	1203	call_pending (EV_P)
514	{	1204	{
		1205	int pri;
		1206
		1207	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	1208	while (pendingcnt [pri])
516	{	1209	{
517	ANPENDING *p = pendings + --pendingcnt;	1210	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		1211
519	if (p->w)	1212	if (expect_true (p->w))
520	{	1213	{
		1214	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1215
521	p->w->pending = 0;	1216	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	1217	EV_CB_INVOKE (p->w, p->events);
523	}	1218	}
524	}	1219	}
525	}	1220	}
526		1221
527	static void	1222	void inline_size
528	timers_reify (void)	1223	timers_reify (EV_P)
529	{	1224	{
530	while (timercnt && timers [0]->at <= now)	1225	while (timercnt && ((WT)timers [0])->at <= mn_now)
531	{	1226	{
532	struct ev_timer *w = timers [0];	1227	ev_timer *w = (ev_timer *)timers [0];
		1228
		1229	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
533		1230
534	/* first reschedule or stop timer */	1231	/* first reschedule or stop timer */
535	if (w->repeat)	1232	if (w->repeat)
536	{	1233	{
		1234	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1235
537	w->at = now + w->repeat;	1236	((WT)w)->at += w->repeat;
538	assert (("timer timeout in the past, negative repeat?", w->at > now));	1237	if (((WT)w)->at < mn_now)
		1238	((WT)w)->at = mn_now;
		1239
539	downheap ((WT *)timers, timercnt, 0);	1240	downheap (timers, timercnt, 0);
540	}	1241	}
541	else	1242	else
542	ev_timer_stop (w); /* nonrepeating: stop timer */	1243	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543		1244
544	event ((W)w, EV_TIMEOUT);	1245	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
545	}	1246	}
546	}	1247	}
547		1248
548	static void	1249	#if EV_PERIODIC_ENABLE
		1250	void inline_size
549	periodics_reify (void)	1251	periodics_reify (EV_P)
550	{	1252	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	1253	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
552	{	1254	{
553	struct ev_periodic *w = periodics [0];	1255	ev_periodic *w = (ev_periodic *)periodics [0];
		1256
		1257	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
554		1258
555	/* first reschedule or stop timer */	1259	/* first reschedule or stop timer */
556	if (w->interval)	1260	if (w->reschedule_cb)
557	{	1261	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1262	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
559	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1263	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	1264	downheap (periodics, periodiccnt, 0);
		1265	}
		1266	else if (w->interval)
		1267	{
		1268	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1269	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1270	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1271	downheap (periodics, periodiccnt, 0);
561	}	1272	}
562	else	1273	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	1274	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		1275
565	event ((W)w, EV_TIMEOUT);	1276	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566	}	1277	}
567	}	1278	}
568		1279
569	static void	1280	static void noinline
570	periodics_reschedule (ev_tstamp diff)	1281	periodics_reschedule (EV_P)
571	{	1282	{
572	int i;	1283	int i;
573		1284
574	/* adjust periodics after time jump */	1285	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	1286	for (i = 0; i < periodiccnt; ++i)
576	{	1287	{
577	struct ev_periodic *w = periodics [i];	1288	ev_periodic *w = (ev_periodic *)periodics [i];
578		1289
		1290	if (w->reschedule_cb)
		1291	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
579	if (w->interval)	1292	else if (w->interval)
		1293	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1294	}
		1295
		1296	/* now rebuild the heap */
		1297	for (i = periodiccnt >> 1; i--; )
		1298	downheap (periodics, periodiccnt, i);
		1299	}
		1300	#endif
		1301
		1302	#if EV_IDLE_ENABLE
		1303	void inline_size
		1304	idle_reify (EV_P)
		1305	{
		1306	if (expect_false (idleall))
		1307	{
		1308	int pri;
		1309
		1310	for (pri = NUMPRI; pri--; )
580	{	1311	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1312	if (pendingcnt [pri])
		1313	break;
582		1314
583	if (fabs (diff) >= 1e-4)	1315	if (idlecnt [pri])
584	{	1316	{
585	ev_periodic_stop (w);	1317	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
586	ev_periodic_start (w);	1318	break;
587
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */
589	}	1319	}
590	}	1320	}
591	}	1321	}
592	}	1322	}
		1323	#endif
593		1324
594	static void	1325	void inline_speed
595	time_update (void)	1326	time_update (EV_P_ ev_tstamp max_block)
596	{	1327	{
597	int i;	1328	int i;
598		1329
599	ev_now = ev_time ();	1330	#if EV_USE_MONOTONIC
600
601	if (have_monotonic)	1331	if (expect_true (have_monotonic))
602	{	1332	{
603	ev_tstamp odiff = diff;	1333	ev_tstamp odiff = rtmn_diff;
604		1334
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1335	mn_now = get_clock ();
		1336
		1337	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1338	/* interpolate in the meantime */
		1339	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
606	{	1340	{
607	now = get_clock ();	1341	ev_rt_now = rtmn_diff + mn_now;
		1342	return;
		1343	}
		1344
		1345	now_floor = mn_now;
		1346	ev_rt_now = ev_time ();
		1347
		1348	/* loop a few times, before making important decisions.
		1349	* on the choice of "4": one iteration isn't enough,
		1350	* in case we get preempted during the calls to
		1351	* ev_time and get_clock. a second call is almost guaranteed
		1352	* to succeed in that case, though. and looping a few more times
		1353	* doesn't hurt either as we only do this on time-jumps or
		1354	* in the unlikely event of having been preempted here.
		1355	*/
		1356	for (i = 4; --i; )
		1357	{
608	diff = ev_now - now;	1358	rtmn_diff = ev_rt_now - mn_now;
609		1359
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1360	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
611	return; /* all is well */	1361	return; /* all is well */
612		1362
613	ev_now = ev_time ();	1363	ev_rt_now = ev_time ();
		1364	mn_now = get_clock ();
		1365	now_floor = mn_now;
614	}	1366	}
615		1367
		1368	# if EV_PERIODIC_ENABLE
616	periodics_reschedule (diff - odiff);	1369	periodics_reschedule (EV_A);
		1370	# endif
617	/* no timer adjustment, as the monotonic clock doesn't jump */	1371	/* no timer adjustment, as the monotonic clock doesn't jump */
		1372	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
618	}	1373	}
619	else	1374	else
		1375	#endif
620	{	1376	{
621	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1377	ev_rt_now = ev_time ();
		1378
		1379	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
622	{	1380	{
		1381	#if EV_PERIODIC_ENABLE
623	periodics_reschedule (ev_now - now);	1382	periodics_reschedule (EV_A);
624		1383	#endif
625	/* adjust timers. this is easy, as the offset is the same for all */	1384	/* adjust timers. this is easy, as the offset is the same for all of them */
626	for (i = 0; i < timercnt; ++i)	1385	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	1386	((WT)timers [i])->at += ev_rt_now - mn_now;
628	}	1387	}
629		1388
630	now = ev_now;	1389	mn_now = ev_rt_now;
631	}	1390	}
632	}	1391	}
633		1392
634	int ev_loop_done;	1393	void
		1394	ev_ref (EV_P)
		1395	{
		1396	++activecnt;
		1397	}
635		1398
		1399	void
		1400	ev_unref (EV_P)
		1401	{
		1402	--activecnt;
		1403	}
		1404
		1405	static int loop_done;
		1406
		1407	void
636	void ev_loop (int flags)	1408	ev_loop (EV_P_ int flags)
637	{	1409	{
638	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1410	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1411	? EVUNLOOP_ONE
		1412	: EVUNLOOP_CANCEL;
		1413
		1414	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
640		1415
641	do	1416	do
642	{	1417	{
		1418	#ifndef _WIN32
		1419	if (expect_false (curpid)) /* penalise the forking check even more */
		1420	if (expect_false (getpid () != curpid))
		1421	{
		1422	curpid = getpid ();
		1423	postfork = 1;
		1424	}
		1425	#endif
		1426
		1427	#if EV_FORK_ENABLE
		1428	/* we might have forked, so queue fork handlers */
		1429	if (expect_false (postfork))
		1430	if (forkcnt)
		1431	{
		1432	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1433	call_pending (EV_A);
		1434	}
		1435	#endif
		1436
643	/* queue check watchers (and execute them) */	1437	/* queue prepare watchers (and execute them) */
644	if (preparecnt)	1438	if (expect_false (preparecnt))
645	{	1439	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1440	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	1441	call_pending (EV_A);
648	}	1442	}
649		1443
		1444	if (expect_false (!activecnt))
		1445	break;
		1446
		1447	/* we might have forked, so reify kernel state if necessary */
		1448	if (expect_false (postfork))
		1449	loop_fork (EV_A);
		1450
650	/* update fd-related kernel structures */	1451	/* update fd-related kernel structures */
651	fd_reify ();	1452	fd_reify (EV_A);
652		1453
653	/* calculate blocking time */	1454	/* calculate blocking time */
		1455	{
		1456	ev_tstamp block;
654		1457
655	/* we only need this for !monotonic clockor timers, but as we basically	1458	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
656	always have timers, we just calculate it always */	1459	block = 0.; /* do not block at all */
657	ev_now = ev_time ();
658
659	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;
661	else	1460	else
662	{	1461	{
		1462	/* update time to cancel out callback processing overhead */
		1463	time_update (EV_A_ 1e100);
		1464
663	block = MAX_BLOCKTIME;	1465	block = MAX_BLOCKTIME;
664		1466
665	if (timercnt)	1467	if (timercnt)
666	{	1468	{
667	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;
668	if (block > to) block = to;	1470	if (block > to) block = to;
669	}	1471	}
670		1472
		1473	#if EV_PERIODIC_ENABLE
671	if (periodiccnt)	1474	if (periodiccnt)
672	{	1475	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1476	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
674	if (block > to) block = to;	1477	if (block > to) block = to;
675	}	1478	}
		1479	#endif
676		1480
677	if (block < 0.) block = 0.;	1481	if (expect_false (block < 0.)) block = 0.;
678	}	1482	}
679		1483
680	method_poll (block);	1484	++loop_count;
		1485	backend_poll (EV_A_ block);
681		1486
682	/* update ev_now, do magic */	1487	/* update ev_rt_now, do magic */
683	time_update ();	1488	time_update (EV_A_ block);
		1489	}
684		1490
685	/* queue pending timers and reschedule them */	1491	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1492	timers_reify (EV_A); /* relative timers called last */
		1493	#if EV_PERIODIC_ENABLE
687	periodics_reify (); /* absolute timers called first */	1494	periodics_reify (EV_A); /* absolute timers called first */
		1495	#endif
688		1496
		1497	#if EV_IDLE_ENABLE
689	/* queue idle watchers unless io or timers are pending */	1498	/* queue idle watchers unless other events are pending */
690	if (!pendingcnt)	1499	idle_reify (EV_A);
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1500	#endif
692		1501
693	/* queue check watchers, to be executed first */	1502	/* queue check watchers, to be executed first */
694	if (checkcnt)	1503	if (expect_false (checkcnt))
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1504	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1505
697	call_pending ();	1506	call_pending (EV_A);
698	}
699	while (!ev_loop_done);
700		1507
701	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	{
702	ev_loop_done = 0;	1518	loop_done = how;
703	}	1519	}
704		1520
705	/*****************************************************************************/	1521	/*****************************************************************************/
706		1522
707	static void	1523	void inline_size
708	wlist_add (WL *head, WL elem)	1524	wlist_add (WL *head, WL elem)
709	{	1525	{
710	elem->next = *head;	1526	elem->next = *head;
711	*head = elem;	1527	*head = elem;
712	}	1528	}
713		1529
714	static void	1530	void inline_size
715	wlist_del (WL *head, WL elem)	1531	wlist_del (WL *head, WL elem)
716	{	1532	{
717	while (*head)	1533	while (*head)
718	{	1534	{
719	if (*head == elem)	1535	if (*head == elem)
…		…
724		1540
725	head = &(*head)->next;	1541	head = &(*head)->next;
726	}	1542	}
727	}	1543	}
728		1544
729	static void	1545	void inline_speed
730	ev_clear (W w)	1546	clear_pending (EV_P_ W w)
731	{	1547	{
732	if (w->pending)	1548	if (w->pending)
733	{	1549	{
734	pendings [w->pending - 1].w = 0;	1550	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1551	w->pending = 0;
736	}	1552	}
737	}	1553	}
738		1554
739	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
740	ev_start (W w, int active)	1582	ev_start (EV_P_ W w, int active)
741	{	1583	{
		1584	pri_adjust (EV_A_ w);
742	w->active = active;	1585	w->active = active;
		1586	ev_ref (EV_A);
743	}	1587	}
744		1588
745	static void	1589	void inline_size
746	ev_stop (W w)	1590	ev_stop (EV_P_ W w)
747	{	1591	{
		1592	ev_unref (EV_A);
748	w->active = 0;	1593	w->active = 0;
749	}	1594	}
750		1595
751	/*****************************************************************************/	1596	/*****************************************************************************/
752		1597
753	void	1598	void noinline
754	ev_io_start (struct ev_io *w)	1599	ev_io_start (EV_P_ ev_io *w)
755	{	1600	{
756	if (ev_is_active (w))
757	return;
758
759	int fd = w->fd;	1601	int fd = w->fd;
760		1602
		1603	if (expect_false (ev_is_active (w)))
		1604	return;
		1605
		1606	assert (("ev_io_start called with negative fd", fd >= 0));
		1607
761	ev_start ((W)w, 1);	1608	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1609	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1610	wlist_add (&anfds[fd].head, (WL)w);
764		1611
765	fd_change (fd);	1612	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1613	w->events &= ~EV_IOFDSET;
766	}	1614	}
767		1615
768	void	1616	void noinline
769	ev_io_stop (struct ev_io *w)	1617	ev_io_stop (EV_P_ ev_io *w)
770	{	1618	{
771	ev_clear ((W)w);	1619	clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1620	if (expect_false (!ev_is_active (w)))
773	return;	1621	return;
774		1622
		1623	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1624
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1625	wlist_del (&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1626	ev_stop (EV_A_ (W)w);
777		1627
778	fd_change (w->fd);	1628	fd_change (EV_A_ w->fd, 1);
779	}	1629	}
780		1630
781	void	1631	void noinline
782	ev_timer_start (struct ev_timer *w)	1632	ev_timer_start (EV_P_ ev_timer *w)
783	{	1633	{
784	if (ev_is_active (w))	1634	if (expect_false (ev_is_active (w)))
785	return;	1635	return;
786		1636
787	w->at += now;	1637	((WT)w)->at += mn_now;
788		1638
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1639	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1640
791	ev_start ((W)w, ++timercnt);	1641	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1642	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
793	timers [timercnt - 1] = w;	1643	timers [timercnt - 1] = (WT)w;
794	upheap ((WT *)timers, timercnt - 1);	1644	upheap (timers, timercnt - 1);
795	}
796		1645
797	void	1646	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1647	}
		1648
		1649	void noinline
798	ev_timer_stop (struct ev_timer *w)	1650	ev_timer_stop (EV_P_ ev_timer *w)
799	{	1651	{
800	ev_clear ((W)w);	1652	clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1653	if (expect_false (!ev_is_active (w)))
802	return;	1654	return;
803		1655
804	if (w->active < timercnt--)	1656	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1657
		1658	{
		1659	int active = ((W)w)->active;
		1660
		1661	if (expect_true (--active < --timercnt))
805	{	1662	{
806	timers [w->active - 1] = timers [timercnt];	1663	timers [active] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1664	adjustheap (timers, timercnt, active);
808	}	1665	}
		1666	}
809		1667
810	w->at = w->repeat;	1668	((WT)w)->at -= mn_now;
811		1669
812	ev_stop ((W)w);	1670	ev_stop (EV_A_ (W)w);
813	}	1671	}
814		1672
815	void	1673	void noinline
816	ev_timer_again (struct ev_timer *w)	1674	ev_timer_again (EV_P_ ev_timer *w)
817	{	1675	{
818	if (ev_is_active (w))	1676	if (ev_is_active (w))
819	{	1677	{
820	if (w->repeat)	1678	if (w->repeat)
821	{	1679	{
822	w->at = now + w->repeat;	1680	((WT)w)->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1681	adjustheap (timers, timercnt, ((W)w)->active - 1);
824	}	1682	}
825	else	1683	else
826	ev_timer_stop (w);	1684	ev_timer_stop (EV_A_ w);
827	}	1685	}
828	else if (w->repeat)	1686	else if (w->repeat)
		1687	{
		1688	w->at = w->repeat;
829	ev_timer_start (w);	1689	ev_timer_start (EV_A_ w);
		1690	}
830	}	1691	}
831		1692
832	void	1693	#if EV_PERIODIC_ENABLE
		1694	void noinline
833	ev_periodic_start (struct ev_periodic *w)	1695	ev_periodic_start (EV_P_ ev_periodic *w)
834	{	1696	{
835	if (ev_is_active (w))	1697	if (expect_false (ev_is_active (w)))
836	return;	1698	return;
837		1699
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1700	if (w->reschedule_cb)
839		1701	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1702	else if (w->interval)
		1703	{
		1704	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1705	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1706	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1707	}
		1708	else
		1709	((WT)w)->at = w->offset;
843		1710
844	ev_start ((W)w, ++periodiccnt);	1711	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1712	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
846	periodics [periodiccnt - 1] = w;	1713	periodics [periodiccnt - 1] = (WT)w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1714	upheap (periodics, periodiccnt - 1);
848	}
849		1715
850	void	1716	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1717	}
		1718
		1719	void noinline
851	ev_periodic_stop (struct ev_periodic *w)	1720	ev_periodic_stop (EV_P_ ev_periodic *w)
852	{	1721	{
853	ev_clear ((W)w);	1722	clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1723	if (expect_false (!ev_is_active (w)))
855	return;	1724	return;
856		1725
857	if (w->active < periodiccnt--)	1726	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1727
		1728	{
		1729	int active = ((W)w)->active;
		1730
		1731	if (expect_true (--active < --periodiccnt))
858	{	1732	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1733	periodics [active] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1734	adjustheap (periodics, periodiccnt, active);
861	}	1735	}
		1736	}
862		1737
863	ev_stop ((W)w);	1738	ev_stop (EV_A_ (W)w);
864	}	1739	}
865		1740
866	void	1741	void noinline
		1742	ev_periodic_again (EV_P_ ev_periodic *w)
		1743	{
		1744	/* TODO: use adjustheap and recalculation */
		1745	ev_periodic_stop (EV_A_ w);
		1746	ev_periodic_start (EV_A_ w);
		1747	}
		1748	#endif
		1749
		1750	#ifndef SA_RESTART
		1751	# define SA_RESTART 0
		1752	#endif
		1753
		1754	void noinline
867	ev_signal_start (struct ev_signal *w)	1755	ev_signal_start (EV_P_ ev_signal *w)
868	{	1756	{
		1757	#if EV_MULTIPLICITY
		1758	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1759	#endif
869	if (ev_is_active (w))	1760	if (expect_false (ev_is_active (w)))
870	return;	1761	return;
871		1762
872	ev_start ((W)w, 1);	1763	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1764
		1765	{
		1766	#ifndef _WIN32
		1767	sigset_t full, prev;
		1768	sigfillset (&full);
		1769	sigprocmask (SIG_SETMASK, &full, &prev);
		1770	#endif
		1771
873	array_needsize (signals, signalmax, w->signum, signals_init);	1772	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1773
		1774	#ifndef _WIN32
		1775	sigprocmask (SIG_SETMASK, &prev, 0);
		1776	#endif
		1777	}
		1778
		1779	ev_start (EV_A_ (W)w, 1);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1780	wlist_add (&signals [w->signum - 1].head, (WL)w);
875		1781
876	if (!w->next)	1782	if (!((WL)w)->next)
877	{	1783	{
		1784	#if _WIN32
		1785	signal (w->signum, sighandler);
		1786	#else
878	struct sigaction sa;	1787	struct sigaction sa;
879	sa.sa_handler = sighandler;	1788	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1789	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1790	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1791	sigaction (w->signum, &sa, 0);
		1792	#endif
883	}	1793	}
884	}	1794	}
885		1795
886	void	1796	void noinline
887	ev_signal_stop (struct ev_signal *w)	1797	ev_signal_stop (EV_P_ ev_signal *w)
888	{	1798	{
889	ev_clear ((W)w);	1799	clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1800	if (expect_false (!ev_is_active (w)))
891	return;	1801	return;
892		1802
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1803	wlist_del (&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1804	ev_stop (EV_A_ (W)w);
895		1805
896	if (!signals [w->signum - 1].head)	1806	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1807	signal (w->signum, SIG_DFL);
898	}	1808	}
899		1809
900	void	1810	void
901	ev_idle_start (struct ev_idle *w)	1811	ev_child_start (EV_P_ ev_child *w)
902	{	1812	{
		1813	#if EV_MULTIPLICITY
		1814	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1815	#endif
903	if (ev_is_active (w))	1816	if (expect_false (ev_is_active (w)))
904	return;	1817	return;
905		1818
906	ev_start ((W)w, ++idlecnt);	1819	ev_start (EV_A_ (W)w, 1);
907	array_needsize (idles, idlemax, idlecnt, );	1820	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
908	idles [idlecnt - 1] = w;
909	}	1821	}
910		1822
911	void	1823	void
912	ev_idle_stop (struct ev_idle *w)	1824	ev_child_stop (EV_P_ ev_child *w)
913	{	1825	{
914	ev_clear ((W)w);	1826	clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1827	if (expect_false (!ev_is_active (w)))
916	return;	1828	return;
917		1829
918	idles [w->active - 1] = idles [--idlecnt];	1830	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
919	ev_stop ((W)w);	1831	ev_stop (EV_A_ (W)w);
920	}	1832	}
921		1833
		1834	#if EV_STAT_ENABLE
		1835
		1836	# ifdef _WIN32
		1837	# undef lstat
		1838	# define lstat(a,b) _stati64 (a,b)
		1839	# endif
		1840
		1841	#define DEF_STAT_INTERVAL 5.0074891
		1842	#define MIN_STAT_INTERVAL 0.1074891
		1843
		1844	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1845
		1846	#if EV_USE_INOTIFY
		1847	# define EV_INOTIFY_BUFSIZE 8192
		1848
		1849	static void noinline
		1850	infy_add (EV_P_ ev_stat *w)
		1851	{
		1852	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);
		1853
		1854	if (w->wd < 0)
		1855	{
		1856	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1857
		1858	/* monitor some parent directory for speedup hints */
		1859	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1860	{
		1861	char path [4096];
		1862	strcpy (path, w->path);
		1863
		1864	do
		1865	{
		1866	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1867	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1868
		1869	char *pend = strrchr (path, '/');
		1870
		1871	if (!pend)
		1872	break; /* whoops, no '/', complain to your admin */
		1873
		1874	*pend = 0;
		1875	w->wd = inotify_add_watch (fs_fd, path, mask);
		1876	}
		1877	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1878	}
		1879	}
		1880	else
		1881	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1882
		1883	if (w->wd >= 0)
		1884	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1885	}
		1886
		1887	static void noinline
		1888	infy_del (EV_P_ ev_stat *w)
		1889	{
		1890	int slot;
		1891	int wd = w->wd;
		1892
		1893	if (wd < 0)
		1894	return;
		1895
		1896	w->wd = -2;
		1897	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1898	wlist_del (&fs_hash [slot].head, (WL)w);
		1899
		1900	/* remove this watcher, if others are watching it, they will rearm */
		1901	inotify_rm_watch (fs_fd, wd);
		1902	}
		1903
		1904	static void noinline
		1905	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1906	{
		1907	if (slot < 0)
		1908	/* overflow, need to check for all hahs slots */
		1909	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1910	infy_wd (EV_A_ slot, wd, ev);
		1911	else
		1912	{
		1913	WL w_;
		1914
		1915	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1916	{
		1917	ev_stat *w = (ev_stat *)w_;
		1918	w_ = w_->next; /* lets us remove this watcher and all before it */
		1919
		1920	if (w->wd == wd || wd == -1)
		1921	{
		1922	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1923	{
		1924	w->wd = -1;
		1925	infy_add (EV_A_ w); /* re-add, no matter what */
		1926	}
		1927
		1928	stat_timer_cb (EV_A_ &w->timer, 0);
		1929	}
		1930	}
		1931	}
		1932	}
		1933
		1934	static void
		1935	infy_cb (EV_P_ ev_io *w, int revents)
		1936	{
		1937	char buf [EV_INOTIFY_BUFSIZE];
		1938	struct inotify_event *ev = (struct inotify_event *)buf;
		1939	int ofs;
		1940	int len = read (fs_fd, buf, sizeof (buf));
		1941
		1942	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1943	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1944	}
		1945
		1946	void inline_size
		1947	infy_init (EV_P)
		1948	{
		1949	if (fs_fd != -2)
		1950	return;
		1951
		1952	fs_fd = inotify_init ();
		1953
		1954	if (fs_fd >= 0)
		1955	{
		1956	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1957	ev_set_priority (&fs_w, EV_MAXPRI);
		1958	ev_io_start (EV_A_ &fs_w);
		1959	}
		1960	}
		1961
		1962	void inline_size
		1963	infy_fork (EV_P)
		1964	{
		1965	int slot;
		1966
		1967	if (fs_fd < 0)
		1968	return;
		1969
		1970	close (fs_fd);
		1971	fs_fd = inotify_init ();
		1972
		1973	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1974	{
		1975	WL w_ = fs_hash [slot].head;
		1976	fs_hash [slot].head = 0;
		1977
		1978	while (w_)
		1979	{
		1980	ev_stat *w = (ev_stat *)w_;
		1981	w_ = w_->next; /* lets us add this watcher */
		1982
		1983	w->wd = -1;
		1984
		1985	if (fs_fd >= 0)
		1986	infy_add (EV_A_ w); /* re-add, no matter what */
		1987	else
		1988	ev_timer_start (EV_A_ &w->timer);
		1989	}
		1990
		1991	}
		1992	}
		1993
		1994	#endif
		1995
922	void	1996	void
		1997	ev_stat_stat (EV_P_ ev_stat *w)
		1998	{
		1999	if (lstat (w->path, &w->attr) < 0)
		2000	w->attr.st_nlink = 0;
		2001	else if (!w->attr.st_nlink)
		2002	w->attr.st_nlink = 1;
		2003	}
		2004
		2005	static void noinline
		2006	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2007	{
		2008	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2009
		2010	/* we copy this here each the time so that */
		2011	/* prev has the old value when the callback gets invoked */
		2012	w->prev = w->attr;
		2013	ev_stat_stat (EV_A_ w);
		2014
		2015	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2016	if (
		2017	w->prev.st_dev != w->attr.st_dev
		2018	|| w->prev.st_ino != w->attr.st_ino
		2019	|| w->prev.st_mode != w->attr.st_mode
		2020	|| w->prev.st_nlink != w->attr.st_nlink
		2021	|| w->prev.st_uid != w->attr.st_uid
		2022	|| w->prev.st_gid != w->attr.st_gid
		2023	|| w->prev.st_rdev != w->attr.st_rdev
		2024	|| w->prev.st_size != w->attr.st_size
		2025	|| w->prev.st_atime != w->attr.st_atime
		2026	|| w->prev.st_mtime != w->attr.st_mtime
		2027	|| w->prev.st_ctime != w->attr.st_ctime
		2028	) {
		2029	#if EV_USE_INOTIFY
		2030	infy_del (EV_A_ w);
		2031	infy_add (EV_A_ w);
		2032	ev_stat_stat (EV_A_ w); /* avoid race... */
		2033	#endif
		2034
		2035	ev_feed_event (EV_A_ w, EV_STAT);
		2036	}
		2037	}
		2038
		2039	void
		2040	ev_stat_start (EV_P_ ev_stat *w)
		2041	{
		2042	if (expect_false (ev_is_active (w)))
		2043	return;
		2044
		2045	/* since we use memcmp, we need to clear any padding data etc. */
		2046	memset (&w->prev, 0, sizeof (ev_statdata));
		2047	memset (&w->attr, 0, sizeof (ev_statdata));
		2048
		2049	ev_stat_stat (EV_A_ w);
		2050
		2051	if (w->interval < MIN_STAT_INTERVAL)
		2052	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2053
		2054	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2055	ev_set_priority (&w->timer, ev_priority (w));
		2056
		2057	#if EV_USE_INOTIFY
		2058	infy_init (EV_A);
		2059
		2060	if (fs_fd >= 0)
		2061	infy_add (EV_A_ w);
		2062	else
		2063	#endif
		2064	ev_timer_start (EV_A_ &w->timer);
		2065
		2066	ev_start (EV_A_ (W)w, 1);
		2067	}
		2068
		2069	void
		2070	ev_stat_stop (EV_P_ ev_stat *w)
		2071	{
		2072	clear_pending (EV_A_ (W)w);
		2073	if (expect_false (!ev_is_active (w)))
		2074	return;
		2075
		2076	#if EV_USE_INOTIFY
		2077	infy_del (EV_A_ w);
		2078	#endif
		2079	ev_timer_stop (EV_A_ &w->timer);
		2080
		2081	ev_stop (EV_A_ (W)w);
		2082	}
		2083	#endif
		2084
		2085	#if EV_IDLE_ENABLE
		2086	void
		2087	ev_idle_start (EV_P_ ev_idle *w)
		2088	{
		2089	if (expect_false (ev_is_active (w)))
		2090	return;
		2091
		2092	pri_adjust (EV_A_ (W)w);
		2093
		2094	{
		2095	int active = ++idlecnt [ABSPRI (w)];
		2096
		2097	++idleall;
		2098	ev_start (EV_A_ (W)w, active);
		2099
		2100	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2101	idles [ABSPRI (w)][active - 1] = w;
		2102	}
		2103	}
		2104
		2105	void
		2106	ev_idle_stop (EV_P_ ev_idle *w)
		2107	{
		2108	clear_pending (EV_A_ (W)w);
		2109	if (expect_false (!ev_is_active (w)))
		2110	return;
		2111
		2112	{
		2113	int active = ((W)w)->active;
		2114
		2115	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2116	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2117
		2118	ev_stop (EV_A_ (W)w);
		2119	--idleall;
		2120	}
		2121	}
		2122	#endif
		2123
		2124	void
923	ev_prepare_start (struct ev_prepare *w)	2125	ev_prepare_start (EV_P_ ev_prepare *w)
924	{	2126	{
925	if (ev_is_active (w))	2127	if (expect_false (ev_is_active (w)))
926	return;	2128	return;
927		2129
928	ev_start ((W)w, ++preparecnt);	2130	ev_start (EV_A_ (W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );	2131	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
930	prepares [preparecnt - 1] = w;	2132	prepares [preparecnt - 1] = w;
931	}	2133	}
932		2134
933	void	2135	void
934	ev_prepare_stop (struct ev_prepare *w)	2136	ev_prepare_stop (EV_P_ ev_prepare *w)
935	{	2137	{
936	ev_clear ((W)w);	2138	clear_pending (EV_A_ (W)w);
937	if (ev_is_active (w))	2139	if (expect_false (!ev_is_active (w)))
938	return;	2140	return;
939		2141
		2142	{
		2143	int active = ((W)w)->active;
940	prepares [w->active - 1] = prepares [--preparecnt];	2144	prepares [active - 1] = prepares [--preparecnt];
		2145	((W)prepares [active - 1])->active = active;
		2146	}
		2147
941	ev_stop ((W)w);	2148	ev_stop (EV_A_ (W)w);
942	}	2149	}
943		2150
944	void	2151	void
945	ev_check_start (struct ev_check *w)	2152	ev_check_start (EV_P_ ev_check *w)
946	{	2153	{
947	if (ev_is_active (w))	2154	if (expect_false (ev_is_active (w)))
948	return;	2155	return;
949		2156
950	ev_start ((W)w, ++checkcnt);	2157	ev_start (EV_A_ (W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );	2158	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
952	checks [checkcnt - 1] = w;	2159	checks [checkcnt - 1] = w;
953	}	2160	}
954		2161
955	void	2162	void
956	ev_check_stop (struct ev_check *w)	2163	ev_check_stop (EV_P_ ev_check *w)
957	{	2164	{
958	ev_clear ((W)w);	2165	clear_pending (EV_A_ (W)w);
959	if (ev_is_active (w))	2166	if (expect_false (!ev_is_active (w)))
960	return;	2167	return;
961		2168
		2169	{
		2170	int active = ((W)w)->active;
962	checks [w->active - 1] = checks [--checkcnt];	2171	checks [active - 1] = checks [--checkcnt];
		2172	((W)checks [active - 1])->active = active;
		2173	}
		2174
963	ev_stop ((W)w);	2175	ev_stop (EV_A_ (W)w);
964	}	2176	}
965		2177
966	void	2178	#if EV_EMBED_ENABLE
967	ev_child_start (struct ev_child *w)	2179	void noinline
		2180	ev_embed_sweep (EV_P_ ev_embed *w)
968	{	2181	{
		2182	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2183	}
		2184
		2185	static void
		2186	embed_cb (EV_P_ ev_io *io, int revents)
		2187	{
		2188	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2189
969	if (ev_is_active (w))	2190	if (ev_cb (w))
970	return;	2191	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2192	else
		2193	ev_embed_sweep (loop, w);
		2194	}
971		2195
		2196	void
		2197	ev_embed_start (EV_P_ ev_embed *w)
		2198	{
		2199	if (expect_false (ev_is_active (w)))
		2200	return;
		2201
		2202	{
		2203	struct ev_loop *loop = w->loop;
		2204	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2205	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2206	}
		2207
		2208	ev_set_priority (&w->io, ev_priority (w));
		2209	ev_io_start (EV_A_ &w->io);
		2210
972	ev_start ((W)w, 1);	2211	ev_start (EV_A_ (W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}	2212	}
975		2213
976	void	2214	void
977	ev_child_stop (struct ev_child *w)	2215	ev_embed_stop (EV_P_ ev_embed *w)
978	{	2216	{
979	ev_clear ((W)w);	2217	clear_pending (EV_A_ (W)w);
980	if (ev_is_active (w))	2218	if (expect_false (!ev_is_active (w)))
981	return;	2219	return;
982		2220
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2221	ev_io_stop (EV_A_ &w->io);
		2222
984	ev_stop ((W)w);	2223	ev_stop (EV_A_ (W)w);
985	}	2224	}
		2225	#endif
		2226
		2227	#if EV_FORK_ENABLE
		2228	void
		2229	ev_fork_start (EV_P_ ev_fork *w)
		2230	{
		2231	if (expect_false (ev_is_active (w)))
		2232	return;
		2233
		2234	ev_start (EV_A_ (W)w, ++forkcnt);
		2235	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2236	forks [forkcnt - 1] = w;
		2237	}
		2238
		2239	void
		2240	ev_fork_stop (EV_P_ ev_fork *w)
		2241	{
		2242	clear_pending (EV_A_ (W)w);
		2243	if (expect_false (!ev_is_active (w)))
		2244	return;
		2245
		2246	{
		2247	int active = ((W)w)->active;
		2248	forks [active - 1] = forks [--forkcnt];
		2249	((W)forks [active - 1])->active = active;
		2250	}
		2251
		2252	ev_stop (EV_A_ (W)w);
		2253	}
		2254	#endif
986		2255
987	/*****************************************************************************/	2256	/*****************************************************************************/
988		2257
989	struct ev_once	2258	struct ev_once
990	{	2259	{
991	struct ev_io io;	2260	ev_io io;
992	struct ev_timer to;	2261	ev_timer to;
993	void (*cb)(int revents, void *arg);	2262	void (*cb)(int revents, void *arg);
994	void *arg;	2263	void *arg;
995	};	2264	};
996		2265
997	static void	2266	static void
998	once_cb (struct ev_once *once, int revents)	2267	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	2268	{
1000	void (*cb)(int revents, void *arg) = once->cb;	2269	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	2270	void *arg = once->arg;
1002		2271
1003	ev_io_stop (&once->io);	2272	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	2273	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	2274	ev_free (once);
1006		2275
1007	cb (revents, arg);	2276	cb (revents, arg);
1008	}	2277	}
1009		2278
1010	static void	2279	static void
1011	once_cb_io (struct ev_io *w, int revents)	2280	once_cb_io (EV_P_ ev_io *w, int revents)
1012	{	2281	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2282	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014	}	2283	}
1015		2284
1016	static void	2285	static void
1017	once_cb_to (struct ev_timer *w, int revents)	2286	once_cb_to (EV_P_ ev_timer *w, int revents)
1018	{	2287	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2288	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020	}	2289	}
1021		2290
1022	void	2291	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2292	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024	{	2293	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	2294	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026		2295
1027	if (!once)	2296	if (expect_false (!once))
		2297	{
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2298	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029	else	2299	return;
1030	{	2300	}
		2301
1031	once->cb = cb;	2302	once->cb = cb;
1032	once->arg = arg;	2303	once->arg = arg;
1033		2304
1034	ev_watcher_init (&once->io, once_cb_io);	2305	ev_init (&once->io, once_cb_io);
1035	if (fd >= 0)	2306	if (fd >= 0)
1036	{	2307	{
1037	ev_io_set (&once->io, fd, events);	2308	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	2309	ev_io_start (EV_A_ &once->io);
1039	}	2310	}
1040		2311
1041	ev_watcher_init (&once->to, once_cb_to);	2312	ev_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	2313	if (timeout >= 0.)
1043	{	2314	{
1044	ev_timer_set (&once->to, timeout, 0.);	2315	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	2316	ev_timer_start (EV_A_ &once->to);
1046	}
1047	}
1048	}
1049
1050	/*****************************************************************************/
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{	2317	}
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif
1106
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}	2318	}
1127		2319
		2320	#ifdef __cplusplus
		2321	}
1128	#endif	2322	#endif
1129		2323
1130
1131
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