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Comparing libev/ev.c (file contents):
Revision 1.26 by root, Wed Oct 31 21:50:15 2007 UTC vs.
Revision 1.116 by root, Thu Nov 15 09:19:42 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	# include "config.h"
		38
		39	# if HAVE_CLOCK_GETTIME
		40	# ifndef EV_USE_MONOTONIC
		41	# define EV_USE_MONOTONIC 1
		42	# endif
		43	# ifndef EV_USE_REALTIME
		44	# define EV_USE_REALTIME 1
		45	# endif
		46	# endif
		47
		48	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)
		49	# define EV_USE_SELECT 1
		50	# endif
		51
		52	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)
		53	# define EV_USE_POLL 1
		54	# endif
		55
		56	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)
		57	# define EV_USE_EPOLL 1
		58	# endif
		59
		60	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)
		61	# define EV_USE_KQUEUE 1
		62	# endif
		63
		64	#endif
		65
30	#include <math.h>	66	#include <math.h>
31	#include <stdlib.h>	67	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	68	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	69	#include <stddef.h>
36		70
37	#include <stdio.h>	71	#include <stdio.h>
38		72
39	#include <assert.h>	73	#include <assert.h>
40	#include <errno.h>	74	#include <errno.h>
41	#include <sys/types.h>	75	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	76	#include <time.h>
45		77
46	#ifndef HAVE_MONOTONIC	78	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	79
48	# define HAVE_MONOTONIC 1	80	#ifndef _WIN32
		81	# include <unistd.h>
		82	# include <sys/time.h>
		83	# include <sys/wait.h>
		84	#else
		85	# define WIN32_LEAN_AND_MEAN
		86	# include <windows.h>
		87	# ifndef EV_SELECT_IS_WINSOCKET
		88	# define EV_SELECT_IS_WINSOCKET 1
49	# endif	89	# endif
50	#endif	90	#endif
51		91
		92	/**/
		93
		94	#ifndef EV_USE_MONOTONIC
		95	# define EV_USE_MONOTONIC 1
		96	#endif
		97
52	#ifndef HAVE_SELECT	98	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	99	# define EV_USE_SELECT 1
		100	# define EV_SELECT_USE_FD_SET 1
		101	#endif
		102
		103	#ifndef EV_USE_POLL
		104	# ifdef _WIN32
		105	# define EV_USE_POLL 0
		106	# else
		107	# define EV_USE_POLL 1
54	#endif	108	# endif
		109	#endif
55		110
56	#ifndef HAVE_EPOLL	111	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	112	# define EV_USE_EPOLL 0
58	#endif	113	#endif
59		114
		115	#ifndef EV_USE_KQUEUE
		116	# define EV_USE_KQUEUE 0
		117	#endif
		118
60	#ifndef HAVE_REALTIME	119	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	120	# define EV_USE_REALTIME 1
62	#endif	121	#endif
		122
		123	/**/
		124
		125	/* darwin simply cannot be helped */
		126	#ifdef __APPLE__
		127	# undef EV_USE_POLL
		128	# undef EV_USE_KQUEUE
		129	#endif
		130
		131	#ifndef CLOCK_MONOTONIC
		132	# undef EV_USE_MONOTONIC
		133	# define EV_USE_MONOTONIC 0
		134	#endif
		135
		136	#ifndef CLOCK_REALTIME
		137	# undef EV_USE_REALTIME
		138	# define EV_USE_REALTIME 0
		139	#endif
		140
		141	#if EV_SELECT_IS_WINSOCKET
		142	# include <winsock.h>
		143	#endif
		144
		145	/**/
63		146
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	147	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	148	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	149	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		150	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
67		151
		152	#ifdef EV_H
		153	# include EV_H
		154	#else
68	#include "ev.h"	155	# include "ev.h"
		156	#endif
		157
		158	#if __GNUC__ >= 3
		159	# define expect(expr,value) __builtin_expect ((expr),(value))
		160	# define inline inline
		161	#else
		162	# define expect(expr,value) (expr)
		163	# define inline static
		164	#endif
		165
		166	#define expect_false(expr) expect ((expr) != 0, 0)
		167	#define expect_true(expr) expect ((expr) != 0, 1)
		168
		169	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		170	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		171
		172	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		173	#define EMPTY2(a,b) /* used to suppress some warnings */
69		174
70	typedef struct ev_watcher *W;	175	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	176	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	177	typedef struct ev_watcher_time *WT;
73		178
74	static ev_tstamp now, diff; /* monotonic clock */	179	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		180
		181	#ifdef _WIN32
		182	# include "ev_win32.c"
		183	#endif
		184
		185	/*****************************************************************************/
		186
		187	static void (*syserr_cb)(const char *msg);
		188
		189	void ev_set_syserr_cb (void (*cb)(const char *msg))
		190	{
		191	syserr_cb = cb;
		192	}
		193
		194	static void
		195	syserr (const char *msg)
		196	{
		197	if (!msg)
		198	msg = "(libev) system error";
		199
		200	if (syserr_cb)
		201	syserr_cb (msg);
		202	else
		203	{
		204	perror (msg);
		205	abort ();
		206	}
		207	}
		208
		209	static void *(*alloc)(void *ptr, long size);
		210
		211	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		212	{
		213	alloc = cb;
		214	}
		215
		216	static void *
		217	ev_realloc (void *ptr, long size)
		218	{
		219	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		220
		221	if (!ptr && size)
		222	{
		223	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		224	abort ();
		225	}
		226
		227	return ptr;
		228	}
		229
		230	#define ev_malloc(size) ev_realloc (0, (size))
		231	#define ev_free(ptr) ev_realloc ((ptr), 0)
		232
		233	/*****************************************************************************/
		234
		235	typedef struct
		236	{
		237	WL head;
		238	unsigned char events;
		239	unsigned char reify;
		240	#if EV_SELECT_IS_WINSOCKET
		241	SOCKET handle;
		242	#endif
		243	} ANFD;
		244
		245	typedef struct
		246	{
		247	W w;
		248	int events;
		249	} ANPENDING;
		250
		251	#if EV_MULTIPLICITY
		252
		253	struct ev_loop
		254	{
		255	ev_tstamp ev_rt_now;
		256	#define ev_rt_now ((loop)->ev_rt_now)
		257	#define VAR(name,decl) decl;
		258	#include "ev_vars.h"
		259	#undef VAR
		260	};
		261	#include "ev_wrap.h"
		262
		263	static struct ev_loop default_loop_struct;
		264	struct ev_loop *ev_default_loop_ptr;
		265
		266	#else
		267
75	ev_tstamp ev_now;	268	ev_tstamp ev_rt_now;
76	int ev_method;	269	#define VAR(name,decl) static decl;
		270	#include "ev_vars.h"
		271	#undef VAR
77		272
78	static int have_monotonic; /* runtime */	273	static int ev_default_loop_ptr;
79		274
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	275	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		276
84	/*****************************************************************************/	277	/*****************************************************************************/
85		278
86	ev_tstamp	279	ev_tstamp
87	ev_time (void)	280	ev_time (void)
88	{	281	{
89	#if HAVE_REALTIME	282	#if EV_USE_REALTIME
90	struct timespec ts;	283	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	284	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	285	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	286	#else
94	struct timeval tv;	287	struct timeval tv;
95	gettimeofday (&tv, 0);	288	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	289	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	290	#endif
98	}	291	}
99		292
100	static ev_tstamp	293	inline ev_tstamp
101	get_clock (void)	294	get_clock (void)
102	{	295	{
103	#if HAVE_MONOTONIC	296	#if EV_USE_MONOTONIC
104	if (have_monotonic)	297	if (expect_true (have_monotonic))
105	{	298	{
106	struct timespec ts;	299	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	300	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	301	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	302	}
110	#endif	303	#endif
111		304
112	return ev_time ();	305	return ev_time ();
113	}	306	}
114		307
		308	#if EV_MULTIPLICITY
		309	ev_tstamp
		310	ev_now (EV_P)
		311	{
		312	return ev_rt_now;
		313	}
		314	#endif
		315
		316	#define array_roundsize(type,n) (((n) | 4) & ~3)
		317
115	#define array_needsize(base,cur,cnt,init) \	318	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	319	if (expect_false ((cnt) > cur)) \
117	{ \	320	{ \
118	int newcnt = cur; \	321	int newcnt = cur; \
119	do \	322	do \
120	{ \	323	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	324	newcnt = array_roundsize (type, newcnt << 1); \
122	} \	325	} \
123	while ((cnt) > newcnt); \	326	while ((cnt) > newcnt); \
124	\	327	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	328	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
126	init (base + cur, newcnt - cur); \	329	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	330	cur = newcnt; \
128	}	331	}
		332
		333	#define array_slim(type,stem) \
		334	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		335	{ \
		336	stem ## max = array_roundsize (stem ## cnt >> 1); \
		337	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		338	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		339	}
		340
		341	#define array_free(stem, idx) \
		342	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
129		343
130	/*****************************************************************************/	344	/*****************************************************************************/
131		345
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	346	static void
145	anfds_init (ANFD *base, int count)	347	anfds_init (ANFD *base, int count)
146	{	348	{
147	while (count--)	349	while (count--)
148	{	350	{
149	base->head = 0;	351	base->head = 0;
150	base->wev = base->rev = EV_NONE;	352	base->events = EV_NONE;
		353	base->reify = 0;
		354
151	++base;	355	++base;
152	}	356	}
153	}	357	}
154		358
155	typedef struct	359	void
		360	ev_feed_event (EV_P_ void *w, int revents)
156	{	361	{
157	W w;	362	W w_ = (W)w;
158	int events;
159	} ANPENDING;
160		363
161	static ANPENDING *pendings;	364	if (w_->pending)
162	static int pendingmax, pendingcnt;
163
164	static void
165	event (W w, int events)
166	{
167	if (w->active)
168	{	365	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	366	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		367	return;
173	}	368	}
174	}
175		369
		370	w_->pending = ++pendingcnt [ABSPRI (w_)];
		371	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		372	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		373	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		374	}
		375
176	static void	376	static void
		377	queue_events (EV_P_ W *events, int eventcnt, int type)
		378	{
		379	int i;
		380
		381	for (i = 0; i < eventcnt; ++i)
		382	ev_feed_event (EV_A_ events [i], type);
		383	}
		384
		385	inline void
177	fd_event (int fd, int events)	386	fd_event (EV_P_ int fd, int revents)
178	{	387	{
179	ANFD *anfd = anfds + fd;	388	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	389	struct ev_io *w;
181		390
182	for (w = anfd->head; w; w = w->next)	391	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
183	{	392	{
184	int ev = w->events & events;	393	int ev = w->events & revents;
185		394
186	if (ev)	395	if (ev)
187	event ((W)w, ev);	396	ev_feed_event (EV_A_ (W)w, ev);
188	}	397	}
189	}	398	}
190		399
		400	void
		401	ev_feed_fd_event (EV_P_ int fd, int revents)
		402	{
		403	fd_event (EV_A_ fd, revents);
		404	}
		405
		406	/*****************************************************************************/
		407
191	static void	408	static void
192	queue_events (W *events, int eventcnt, int type)	409	fd_reify (EV_P)
193	{	410	{
194	int i;	411	int i;
195		412
196	for (i = 0; i < eventcnt; ++i)	413	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	414	{
		415	int fd = fdchanges [i];
		416	ANFD *anfd = anfds + fd;
		417	struct ev_io *w;
		418
		419	int events = 0;
		420
		421	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		422	events |= w->events;
		423
		424	#if EV_SELECT_IS_WINSOCKET
		425	if (events)
		426	{
		427	unsigned long argp;
		428	anfd->handle = _get_osfhandle (fd);
		429	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		430	}
		431	#endif
		432
		433	anfd->reify = 0;
		434
		435	method_modify (EV_A_ fd, anfd->events, events);
		436	anfd->events = events;
		437	}
		438
		439	fdchangecnt = 0;
		440	}
		441
		442	static void
		443	fd_change (EV_P_ int fd)
		444	{
		445	if (anfds [fd].reify)
		446	return;
		447
		448	anfds [fd].reify = 1;
		449
		450	++fdchangecnt;
		451	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		452	fdchanges [fdchangecnt - 1] = fd;
		453	}
		454
		455	static void
		456	fd_kill (EV_P_ int fd)
		457	{
		458	struct ev_io *w;
		459
		460	while ((w = (struct ev_io *)anfds [fd].head))
		461	{
		462	ev_io_stop (EV_A_ w);
		463	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		464	}
		465	}
		466
		467	static int
		468	fd_valid (int fd)
		469	{
		470	#ifdef _WIN32
		471	return _get_osfhandle (fd) != -1;
		472	#else
		473	return fcntl (fd, F_GETFD) != -1;
		474	#endif
198	}	475	}
199		476
200	/* called on EBADF to verify fds */	477	/* called on EBADF to verify fds */
201	static void	478	static void
202	fd_recheck (void)	479	fd_ebadf (EV_P)
203	{	480	{
204	int fd;	481	int fd;
205		482
206	for (fd = 0; fd < anfdmax; ++fd)	483	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	484	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	485	if (!fd_valid (fd) == -1 && errno == EBADF)
209	while (anfds [fd].head)	486	fd_kill (EV_A_ fd);
		487	}
		488
		489	/* called on ENOMEM in select/poll to kill some fds and retry */
		490	static void
		491	fd_enomem (EV_P)
		492	{
		493	int fd;
		494
		495	for (fd = anfdmax; fd--; )
		496	if (anfds [fd].events)
210	{	497	{
211	event ((W)anfds [fd].head, EV_ERROR);	498	fd_kill (EV_A_ fd);
212	evio_stop (anfds [fd].head);	499	return;
213	}	500	}
		501	}
		502
		503	/* usually called after fork if method needs to re-arm all fds from scratch */
		504	static void
		505	fd_rearm_all (EV_P)
		506	{
		507	int fd;
		508
		509	/* this should be highly optimised to not do anything but set a flag */
		510	for (fd = 0; fd < anfdmax; ++fd)
		511	if (anfds [fd].events)
		512	{
		513	anfds [fd].events = 0;
		514	fd_change (EV_A_ fd);
		515	}
214	}	516	}
215		517
216	/*****************************************************************************/	518	/*****************************************************************************/
217		519
218	static struct ev_timer **timers;
219	static int timermax, timercnt;
220
221	static struct ev_periodic **periodics;
222	static int periodicmax, periodiccnt;
223
224	static void	520	static void
225	upheap (WT *timers, int k)	521	upheap (WT *heap, int k)
226	{	522	{
227	WT w = timers [k];	523	WT w = heap [k];
228		524
229	while (k && timers [k >> 1]->at > w->at)	525	while (k && heap [k >> 1]->at > w->at)
230	{	526	{
231	timers [k] = timers [k >> 1];	527	heap [k] = heap [k >> 1];
232	timers [k]->active = k + 1;	528	((W)heap [k])->active = k + 1;
233	k >>= 1;	529	k >>= 1;
234	}	530	}
235		531
236	timers [k] = w;	532	heap [k] = w;
237	timers [k]->active = k + 1;	533	((W)heap [k])->active = k + 1;
238		534
239	}	535	}
240		536
241	static void	537	static void
242	downheap (WT *timers, int N, int k)	538	downheap (WT *heap, int N, int k)
243	{	539	{
244	WT w = timers [k];	540	WT w = heap [k];
245		541
246	while (k < (N >> 1))	542	while (k < (N >> 1))
247	{	543	{
248	int j = k << 1;	544	int j = k << 1;
249		545
250	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	546	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
251	++j;	547	++j;
252		548
253	if (w->at <= timers [j]->at)	549	if (w->at <= heap [j]->at)
254	break;	550	break;
255		551
256	timers [k] = timers [j];	552	heap [k] = heap [j];
257	timers [k]->active = k + 1;	553	((W)heap [k])->active = k + 1;
258	k = j;	554	k = j;
259	}	555	}
260		556
261	timers [k] = w;	557	heap [k] = w;
262	timers [k]->active = k + 1;	558	((W)heap [k])->active = k + 1;
		559	}
		560
		561	inline void
		562	adjustheap (WT *heap, int N, int k)
		563	{
		564	upheap (heap, k);
		565	downheap (heap, N, k);
263	}	566	}
264		567
265	/*****************************************************************************/	568	/*****************************************************************************/
266		569
267	typedef struct	570	typedef struct
268	{	571	{
269	struct ev_signal *head;	572	WL head;
270	sig_atomic_t gotsig;	573	sig_atomic_t volatile gotsig;
271	} ANSIG;	574	} ANSIG;
272		575
273	static ANSIG *signals;	576	static ANSIG *signals;
274	static int signalmax;	577	static int signalmax;
275		578
276	static int sigpipe [2];	579	static int sigpipe [2];
277	static sig_atomic_t gotsig;	580	static sig_atomic_t volatile gotsig;
278	static struct ev_io sigev;	581	static struct ev_io sigev;
279		582
280	static void	583	static void
281	signals_init (ANSIG *base, int count)	584	signals_init (ANSIG *base, int count)
282	{	585	{
283	while (count--)	586	while (count--)
284	{	587	{
285	base->head = 0;	588	base->head = 0;
286	base->gotsig = 0;	589	base->gotsig = 0;
		590
287	++base;	591	++base;
288	}	592	}
289	}	593	}
290		594
291	static void	595	static void
292	sighandler (int signum)	596	sighandler (int signum)
293	{	597	{
		598	#if _WIN32
		599	signal (signum, sighandler);
		600	#endif
		601
294	signals [signum - 1].gotsig = 1;	602	signals [signum - 1].gotsig = 1;
295		603
296	if (!gotsig)	604	if (!gotsig)
297	{	605	{
		606	int old_errno = errno;
298	gotsig = 1;	607	gotsig = 1;
299	write (sigpipe [1], &gotsig, 1);	608	write (sigpipe [1], &signum, 1);
		609	errno = old_errno;
300	}	610	}
301	}	611	}
302		612
		613	void
		614	ev_feed_signal_event (EV_P_ int signum)
		615	{
		616	WL w;
		617
		618	#if EV_MULTIPLICITY
		619	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		620	#endif
		621
		622	--signum;
		623
		624	if (signum < 0 || signum >= signalmax)
		625	return;
		626
		627	signals [signum].gotsig = 0;
		628
		629	for (w = signals [signum].head; w; w = w->next)
		630	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		631	}
		632
303	static void	633	static void
304	sigcb (struct ev_io *iow, int revents)	634	sigcb (EV_P_ struct ev_io *iow, int revents)
305	{	635	{
306	struct ev_signal *w;
307	int sig;	636	int signum;
308		637
		638	read (sigpipe [0], &revents, 1);
309	gotsig = 0;	639	gotsig = 0;
310	read (sigpipe [0], &revents, 1);
311		640
312	for (sig = signalmax; sig--; )	641	for (signum = signalmax; signum--; )
313	if (signals [sig].gotsig)	642	if (signals [signum].gotsig)
314	{	643	ev_feed_signal_event (EV_A_ signum + 1);
315	signals [sig].gotsig = 0;
316
317	for (w = signals [sig].head; w; w = w->next)
318	event ((W)w, EV_SIGNAL);
319	}
320	}	644	}
321		645
322	static void	646	inline void
323	siginit (void)	647	fd_intern (int fd)
324	{	648	{
		649	#ifdef _WIN32
		650	int arg = 1;
		651	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		652	#else
325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	653	fcntl (fd, F_SETFD, FD_CLOEXEC);
326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327
328	/* rather than sort out wether we really need nb, set it */
329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	654	fcntl (fd, F_SETFL, O_NONBLOCK);
330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	655	#endif
		656	}
331		657
		658	static void
		659	siginit (EV_P)
		660	{
		661	fd_intern (sigpipe [0]);
		662	fd_intern (sigpipe [1]);
		663
332	evio_set (&sigev, sigpipe [0], EV_READ);	664	ev_io_set (&sigev, sigpipe [0], EV_READ);
333	evio_start (&sigev);	665	ev_io_start (EV_A_ &sigev);
		666	ev_unref (EV_A); /* child watcher should not keep loop alive */
334	}	667	}
335		668
336	/*****************************************************************************/	669	/*****************************************************************************/
337		670
338	static struct ev_idle **idles;
339	static int idlemax, idlecnt;
340
341	static struct ev_prepare **prepares;
342	static int preparemax, preparecnt;
343
344	static struct ev_check **checks;
345	static int checkmax, checkcnt;
346
347	/*****************************************************************************/
348
349	static struct ev_child *childs [PID_HASHSIZE];	671	static struct ev_child *childs [PID_HASHSIZE];
		672
		673	#ifndef _WIN32
		674
350	static struct ev_signal childev;	675	static struct ev_signal childev;
351		676
352	#ifndef WCONTINUED	677	#ifndef WCONTINUED
353	# define WCONTINUED 0	678	# define WCONTINUED 0
354	#endif	679	#endif
355		680
356	static void	681	static void
357	childcb (struct ev_signal *sw, int revents)	682	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
358	{	683	{
359	struct ev_child *w;	684	struct ev_child *w;
		685
		686	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		687	if (w->pid == pid || !w->pid)
		688	{
		689	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		690	w->rpid = pid;
		691	w->rstatus = status;
		692	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		693	}
		694	}
		695
		696	static void
		697	childcb (EV_P_ struct ev_signal *sw, int revents)
		698	{
360	int pid, status;	699	int pid, status;
361		700
362	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	701	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	702	{
364	if (w->pid == pid || w->pid == -1)	703	/* make sure we are called again until all childs have been reaped */
365	{	704	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
366	w->status = status;	705
367	event ((W)w, EV_CHILD);	706	child_reap (EV_A_ sw, pid, pid, status);
368	}	707	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		708	}
369	}	709	}
		710
		711	#endif
370		712
371	/*****************************************************************************/	713	/*****************************************************************************/
372		714
		715	#if EV_USE_KQUEUE
		716	# include "ev_kqueue.c"
		717	#endif
373	#if HAVE_EPOLL	718	#if EV_USE_EPOLL
374	# include "ev_epoll.c"	719	# include "ev_epoll.c"
375	#endif	720	#endif
		721	#if EV_USE_POLL
		722	# include "ev_poll.c"
		723	#endif
376	#if HAVE_SELECT	724	#if EV_USE_SELECT
377	# include "ev_select.c"	725	# include "ev_select.c"
378	#endif	726	#endif
379		727
380	int	728	int
381	ev_version_major (void)	729	ev_version_major (void)
…		…
387	ev_version_minor (void)	735	ev_version_minor (void)
388	{	736	{
389	return EV_VERSION_MINOR;	737	return EV_VERSION_MINOR;
390	}	738	}
391		739
392	int ev_init (int flags)	740	/* return true if we are running with elevated privileges and should ignore env variables */
		741	static int
		742	enable_secure (void)
393	{	743	{
		744	#ifdef _WIN32
		745	return 0;
		746	#else
		747	return getuid () != geteuid ()
		748	|| getgid () != getegid ();
		749	#endif
		750	}
		751
		752	unsigned int
		753	ev_method (EV_P)
		754	{
		755	return method;
		756	}
		757
		758	static void
		759	loop_init (EV_P_ unsigned int flags)
		760	{
394	if (!ev_method)	761	if (!method)
395	{	762	{
396	#if HAVE_MONOTONIC	763	#if EV_USE_MONOTONIC
397	{	764	{
398	struct timespec ts;	765	struct timespec ts;
399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	766	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400	have_monotonic = 1;	767	have_monotonic = 1;
401	}	768	}
402	#endif	769	#endif
403		770
404	ev_now = ev_time ();	771	ev_rt_now = ev_time ();
405	now = get_clock ();	772	mn_now = get_clock ();
		773	now_floor = mn_now;
406	diff = ev_now - now;	774	rtmn_diff = ev_rt_now - mn_now;
407		775
		776	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
		777	flags = atoi (getenv ("LIBEV_FLAGS"));
		778
		779	if (!(flags & 0x0000ffff))
		780	flags |= 0x0000ffff;
		781
		782	method = 0;
		783	#if EV_USE_KQUEUE
		784	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		785	#endif
		786	#if EV_USE_EPOLL
		787	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
		788	#endif
		789	#if EV_USE_POLL
		790	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
		791	#endif
		792	#if EV_USE_SELECT
		793	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
		794	#endif
		795
		796	ev_init (&sigev, sigcb);
		797	ev_set_priority (&sigev, EV_MAXPRI);
		798	}
		799	}
		800
		801	void
		802	loop_destroy (EV_P)
		803	{
		804	int i;
		805
		806	#if EV_USE_KQUEUE
		807	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		808	#endif
		809	#if EV_USE_EPOLL
		810	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		811	#endif
		812	#if EV_USE_POLL
		813	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		814	#endif
		815	#if EV_USE_SELECT
		816	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		817	#endif
		818
		819	for (i = NUMPRI; i--; )
		820	array_free (pending, [i]);
		821
		822	/* have to use the microsoft-never-gets-it-right macro */
		823	array_free (fdchange, EMPTY0);
		824	array_free (timer, EMPTY0);
		825	#if EV_PERIODICS
		826	array_free (periodic, EMPTY0);
		827	#endif
		828	array_free (idle, EMPTY0);
		829	array_free (prepare, EMPTY0);
		830	array_free (check, EMPTY0);
		831
		832	method = 0;
		833	}
		834
		835	static void
		836	loop_fork (EV_P)
		837	{
		838	#if EV_USE_EPOLL
		839	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		840	#endif
		841	#if EV_USE_KQUEUE
		842	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		843	#endif
		844
		845	if (ev_is_active (&sigev))
		846	{
		847	/* default loop */
		848
		849	ev_ref (EV_A);
		850	ev_io_stop (EV_A_ &sigev);
		851	close (sigpipe [0]);
		852	close (sigpipe [1]);
		853
		854	while (pipe (sigpipe))
		855	syserr ("(libev) error creating pipe");
		856
		857	siginit (EV_A);
		858	}
		859
		860	postfork = 0;
		861	}
		862
		863	#if EV_MULTIPLICITY
		864	struct ev_loop *
		865	ev_loop_new (unsigned int flags)
		866	{
		867	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		868
		869	memset (loop, 0, sizeof (struct ev_loop));
		870
		871	loop_init (EV_A_ flags);
		872
		873	if (ev_method (EV_A))
		874	return loop;
		875
		876	return 0;
		877	}
		878
		879	void
		880	ev_loop_destroy (EV_P)
		881	{
		882	loop_destroy (EV_A);
		883	ev_free (loop);
		884	}
		885
		886	void
		887	ev_loop_fork (EV_P)
		888	{
		889	postfork = 1;
		890	}
		891
		892	#endif
		893
		894	#if EV_MULTIPLICITY
		895	struct ev_loop *
		896	ev_default_loop_ (unsigned int flags)
		897	#else
		898	int
		899	ev_default_loop (unsigned int flags)
		900	#endif
		901	{
		902	if (sigpipe [0] == sigpipe [1])
408	if (pipe (sigpipe))	903	if (pipe (sigpipe))
409	return 0;	904	return 0;
410		905
411	ev_method = EVMETHOD_NONE;	906	if (!ev_default_loop_ptr)
412	#if HAVE_EPOLL	907	{
413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	908	#if EV_MULTIPLICITY
		909	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		910	#else
		911	ev_default_default_loop_ptr = 1;
414	#endif	912	#endif
415	#if HAVE_SELECT
416	if (ev_method == EVMETHOD_NONE) select_init (flags);
417	#endif
418		913
		914	loop_init (EV_A_ flags);
		915
419	if (ev_method)	916	if (ev_method (EV_A))
420	{	917	{
421	evw_init (&sigev, sigcb);
422	siginit ();	918	siginit (EV_A);
423		919
		920	#ifndef _WIN32
424	evsignal_init (&childev, childcb, SIGCHLD);	921	ev_signal_init (&childev, childcb, SIGCHLD);
		922	ev_set_priority (&childev, EV_MAXPRI);
425	evsignal_start (&childev);	923	ev_signal_start (EV_A_ &childev);
		924	ev_unref (EV_A); /* child watcher should not keep loop alive */
		925	#endif
426	}	926	}
		927	else
		928	ev_default_loop_ptr = 0;
427	}	929	}
428		930
429	return ev_method;	931	return ev_default_loop_ptr;
		932	}
		933
		934	void
		935	ev_default_destroy (void)
		936	{
		937	#if EV_MULTIPLICITY
		938	struct ev_loop *loop = ev_default_loop_ptr;
		939	#endif
		940
		941	#ifndef _WIN32
		942	ev_ref (EV_A); /* child watcher */
		943	ev_signal_stop (EV_A_ &childev);
		944	#endif
		945
		946	ev_ref (EV_A); /* signal watcher */
		947	ev_io_stop (EV_A_ &sigev);
		948
		949	close (sigpipe [0]); sigpipe [0] = 0;
		950	close (sigpipe [1]); sigpipe [1] = 0;
		951
		952	loop_destroy (EV_A);
		953	}
		954
		955	void
		956	ev_default_fork (void)
		957	{
		958	#if EV_MULTIPLICITY
		959	struct ev_loop *loop = ev_default_loop_ptr;
		960	#endif
		961
		962	if (method)
		963	postfork = 1;
430	}	964	}
431		965
432	/*****************************************************************************/	966	/*****************************************************************************/
433		967
434	void
435	ev_prefork (void)
436	{
437	/* nop */
438	}
439
440	void
441	ev_postfork_parent (void)
442	{
443	/* nop */
444	}
445
446	void
447	ev_postfork_child (void)
448	{
449	#if HAVE_EPOLL
450	if (ev_method == EVMETHOD_EPOLL)
451	epoll_postfork_child ();
452	#endif
453
454	evio_stop (&sigev);
455	close (sigpipe [0]);
456	close (sigpipe [1]);
457	pipe (sigpipe);
458	siginit ();
459	}
460
461	/*****************************************************************************/
462
463	static void	968	static int
464	fd_reify (void)	969	any_pending (EV_P)
465	{	970	{
466	int i;	971	int pri;
467		972
468	for (i = 0; i < fdchangecnt; ++i)	973	for (pri = NUMPRI; pri--; )
469	{	974	if (pendingcnt [pri])
470	int fd = fdchanges [i];	975	return 1;
471	ANFD *anfd = anfds + fd;
472	struct ev_io *w;
473		976
474	int wev = 0;	977	return 0;
		978	}
475		979
476	for (w = anfd->head; w; w = w->next)	980	static void
477	wev |= w->events;	981	call_pending (EV_P)
		982	{
		983	int pri;
478		984
479	if (anfd->wev != wev)	985	for (pri = NUMPRI; pri--; )
		986	while (pendingcnt [pri])
480	{	987	{
481	method_modify (fd, anfd->wev, wev);
482	anfd->wev = wev;
483	}
484	}
485
486	fdchangecnt = 0;
487	}
488
489	static void
490	call_pending (void)
491	{
492	while (pendingcnt)
493	{
494	ANPENDING *p = pendings + --pendingcnt;	988	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
495		989
496	if (p->w)	990	if (p->w)
497	{	991	{
498	p->w->pending = 0;	992	p->w->pending = 0;
499	p->w->cb (p->w, p->events);	993	EV_CB_INVOKE (p->w, p->events);
500	}	994	}
501	}	995	}
502	}	996	}
503		997
504	static void	998	static void
505	timers_reify (void)	999	timers_reify (EV_P)
506	{	1000	{
507	while (timercnt && timers [0]->at <= now)	1001	while (timercnt && ((WT)timers [0])->at <= mn_now)
508	{	1002	{
509	struct ev_timer *w = timers [0];	1003	struct ev_timer *w = timers [0];
510		1004
511	event ((W)w, EV_TIMEOUT);	1005	assert (("inactive timer on timer heap detected", ev_is_active (w)));
512		1006
513	/* first reschedule or stop timer */	1007	/* first reschedule or stop timer */
514	if (w->repeat)	1008	if (w->repeat)
515	{	1009	{
		1010	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1011
516	w->at = now + w->repeat;	1012	((WT)w)->at += w->repeat;
517	assert (("timer timeout in the past, negative repeat?", w->at > now));	1013	if (((WT)w)->at < mn_now)
		1014	((WT)w)->at = mn_now;
		1015
518	downheap ((WT *)timers, timercnt, 0);	1016	downheap ((WT *)timers, timercnt, 0);
519	}	1017	}
520	else	1018	else
521	evtimer_stop (w); /* nonrepeating: stop timer */	1019	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522	}
523	}
524		1020
		1021	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1022	}
		1023	}
		1024
		1025	#if EV_PERIODICS
525	static void	1026	static void
526	periodics_reify (void)	1027	periodics_reify (EV_P)
527	{	1028	{
528	while (periodiccnt && periodics [0]->at <= ev_now)	1029	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
529	{	1030	{
530	struct ev_periodic *w = periodics [0];	1031	struct ev_periodic *w = periodics [0];
531		1032
		1033	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1034
532	/* first reschedule or stop timer */	1035	/* first reschedule or stop timer */
533	if (w->interval)	1036	if (w->reschedule_cb)
534	{	1037	{
		1038	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1039	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1040	downheap ((WT *)periodics, periodiccnt, 0);
		1041	}
		1042	else if (w->interval)
		1043	{
535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1044	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1045	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
537	downheap ((WT *)periodics, periodiccnt, 0);	1046	downheap ((WT *)periodics, periodiccnt, 0);
538	}	1047	}
539	else	1048	else
540	evperiodic_stop (w); /* nonrepeating: stop timer */	1049	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541		1050
542	event ((W)w, EV_TIMEOUT);	1051	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
543	}	1052	}
544	}	1053	}
545		1054
546	static void	1055	static void
547	periodics_reschedule (ev_tstamp diff)	1056	periodics_reschedule (EV_P)
548	{	1057	{
549	int i;	1058	int i;
550		1059
551	/* adjust periodics after time jump */	1060	/* adjust periodics after time jump */
552	for (i = 0; i < periodiccnt; ++i)	1061	for (i = 0; i < periodiccnt; ++i)
553	{	1062	{
554	struct ev_periodic *w = periodics [i];	1063	struct ev_periodic *w = periodics [i];
555		1064
		1065	if (w->reschedule_cb)
		1066	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
556	if (w->interval)	1067	else if (w->interval)
		1068	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1069	}
		1070
		1071	/* now rebuild the heap */
		1072	for (i = periodiccnt >> 1; i--; )
		1073	downheap ((WT *)periodics, periodiccnt, i);
		1074	}
		1075	#endif
		1076
		1077	inline int
		1078	time_update_monotonic (EV_P)
		1079	{
		1080	mn_now = get_clock ();
		1081
		1082	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1083	{
		1084	ev_rt_now = rtmn_diff + mn_now;
		1085	return 0;
		1086	}
		1087	else
		1088	{
		1089	now_floor = mn_now;
		1090	ev_rt_now = ev_time ();
		1091	return 1;
		1092	}
		1093	}
		1094
		1095	static void
		1096	time_update (EV_P)
		1097	{
		1098	int i;
		1099
		1100	#if EV_USE_MONOTONIC
		1101	if (expect_true (have_monotonic))
		1102	{
		1103	if (time_update_monotonic (EV_A))
557	{	1104	{
558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1105	ev_tstamp odiff = rtmn_diff;
559		1106
560	if (fabs (diff) >= 1e-4)	1107	for (i = 4; --i; ) /* loop a few times, before making important decisions */
561	{	1108	{
562	evperiodic_stop (w);	1109	rtmn_diff = ev_rt_now - mn_now;
563	evperiodic_start (w);
564		1110
565	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1111	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1112	return; /* all is well */
		1113
		1114	ev_rt_now = ev_time ();
		1115	mn_now = get_clock ();
		1116	now_floor = mn_now;
566	}	1117	}
		1118
		1119	# if EV_PERIODICS
		1120	periodics_reschedule (EV_A);
		1121	# endif
		1122	/* no timer adjustment, as the monotonic clock doesn't jump */
		1123	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
567	}	1124	}
568	}	1125	}
569	}	1126	else
570		1127	#endif
571	static void	1128	{
572	time_update (void)
573	{
574	int i;
575
576	ev_now = ev_time ();	1129	ev_rt_now = ev_time ();
577		1130
578	if (have_monotonic)	1131	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
579	{
580	ev_tstamp odiff = diff;
581
582	for (i = 4; --i; ) /* loop a few times, before making important decisions */
583	{	1132	{
584	now = get_clock ();	1133	#if EV_PERIODICS
585	diff = ev_now - now;
586
587	if (fabs (odiff - diff) < MIN_TIMEJUMP)
588	return; /* all is well */
589
590	ev_now = ev_time ();
591	}
592
593	periodics_reschedule (diff - odiff);
594	/* no timer adjustment, as the monotonic clock doesn't jump */
595	}
596	else
597	{
598	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
599	{
600	periodics_reschedule (ev_now - now);	1134	periodics_reschedule (EV_A);
		1135	#endif
601		1136
602	/* adjust timers. this is easy, as the offset is the same for all */	1137	/* adjust timers. this is easy, as the offset is the same for all */
603	for (i = 0; i < timercnt; ++i)	1138	for (i = 0; i < timercnt; ++i)
604	timers [i]->at += diff;	1139	((WT)timers [i])->at += ev_rt_now - mn_now;
605	}	1140	}
606		1141
607	now = ev_now;	1142	mn_now = ev_rt_now;
608	}	1143	}
609	}	1144	}
610		1145
611	int ev_loop_done;	1146	void
		1147	ev_ref (EV_P)
		1148	{
		1149	++activecnt;
		1150	}
612		1151
		1152	void
		1153	ev_unref (EV_P)
		1154	{
		1155	--activecnt;
		1156	}
		1157
		1158	static int loop_done;
		1159
		1160	void
613	void ev_loop (int flags)	1161	ev_loop (EV_P_ int flags)
614	{	1162	{
615	double block;	1163	double block;
616	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1164	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
617		1165
618	do	1166	while (activecnt)
619	{	1167	{
620	/* queue check watchers (and execute them) */	1168	/* queue check watchers (and execute them) */
621	if (preparecnt)	1169	if (expect_false (preparecnt))
622	{	1170	{
623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1171	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624	call_pending ();	1172	call_pending (EV_A);
625	}	1173	}
626		1174
		1175	/* we might have forked, so reify kernel state if necessary */
		1176	if (expect_false (postfork))
		1177	loop_fork (EV_A);
		1178
627	/* update fd-related kernel structures */	1179	/* update fd-related kernel structures */
628	fd_reify ();	1180	fd_reify (EV_A);
629		1181
630	/* calculate blocking time */	1182	/* calculate blocking time */
631		1183
632	/* we only need this for !monotonic clockor timers, but as we basically	1184	/* we only need this for !monotonic clock or timers, but as we basically
633	always have timers, we just calculate it always */	1185	always have timers, we just calculate it always */
		1186	#if EV_USE_MONOTONIC
		1187	if (expect_true (have_monotonic))
		1188	time_update_monotonic (EV_A);
		1189	else
		1190	#endif
		1191	{
634	ev_now = ev_time ();	1192	ev_rt_now = ev_time ();
		1193	mn_now = ev_rt_now;
		1194	}
635		1195
636	if (flags & EVLOOP_NONBLOCK || idlecnt)	1196	if (flags & EVLOOP_NONBLOCK || idlecnt)
637	block = 0.;	1197	block = 0.;
638	else	1198	else
639	{	1199	{
640	block = MAX_BLOCKTIME;	1200	block = MAX_BLOCKTIME;
641		1201
642	if (timercnt)	1202	if (timercnt)
643	{	1203	{
644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1204	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
645	if (block > to) block = to;	1205	if (block > to) block = to;
646	}	1206	}
647		1207
		1208	#if EV_PERIODICS
648	if (periodiccnt)	1209	if (periodiccnt)
649	{	1210	{
650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1211	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
651	if (block > to) block = to;	1212	if (block > to) block = to;
652	}	1213	}
		1214	#endif
653		1215
654	if (block < 0.) block = 0.;	1216	if (block < 0.) block = 0.;
655	}	1217	}
656		1218
657	method_poll (block);	1219	method_poll (EV_A_ block);
658		1220
659	/* update ev_now, do magic */	1221	/* update ev_rt_now, do magic */
660	time_update ();	1222	time_update (EV_A);
661		1223
662	/* queue pending timers and reschedule them */	1224	/* queue pending timers and reschedule them */
663	timers_reify (); /* relative timers called last */	1225	timers_reify (EV_A); /* relative timers called last */
		1226	#if EV_PERIODICS
664	periodics_reify (); /* absolute timers called first */	1227	periodics_reify (EV_A); /* absolute timers called first */
		1228	#endif
665		1229
666	/* queue idle watchers unless io or timers are pending */	1230	/* queue idle watchers unless io or timers are pending */
667	if (!pendingcnt)	1231	if (idlecnt && !any_pending (EV_A))
668	queue_events ((W *)idles, idlecnt, EV_IDLE);	1232	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
669		1233
670	/* queue check watchers, to be executed first */	1234	/* queue check watchers, to be executed first */
671	if (checkcnt)	1235	if (checkcnt)
672	queue_events ((W *)checks, checkcnt, EV_CHECK);	1236	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673		1237
674	call_pending ();	1238	call_pending (EV_A);
675	}
676	while (!ev_loop_done);
677		1239
		1240	if (loop_done)
		1241	break;
		1242	}
		1243
678	if (ev_loop_done != 2)	1244	if (loop_done != 2)
679	ev_loop_done = 0;	1245	loop_done = 0;
		1246	}
		1247
		1248	void
		1249	ev_unloop (EV_P_ int how)
		1250	{
		1251	loop_done = how;
680	}	1252	}
681		1253
682	/*****************************************************************************/	1254	/*****************************************************************************/
683		1255
684	static void	1256	inline void
685	wlist_add (WL *head, WL elem)	1257	wlist_add (WL *head, WL elem)
686	{	1258	{
687	elem->next = *head;	1259	elem->next = *head;
688	*head = elem;	1260	*head = elem;
689	}	1261	}
690		1262
691	static void	1263	inline void
692	wlist_del (WL *head, WL elem)	1264	wlist_del (WL *head, WL elem)
693	{	1265	{
694	while (*head)	1266	while (*head)
695	{	1267	{
696	if (*head == elem)	1268	if (*head == elem)
…		…
701		1273
702	head = &(*head)->next;	1274	head = &(*head)->next;
703	}	1275	}
704	}	1276	}
705		1277
706	static void	1278	inline void
707	ev_clear (W w)	1279	ev_clear_pending (EV_P_ W w)
708	{	1280	{
709	if (w->pending)	1281	if (w->pending)
710	{	1282	{
711	pendings [w->pending - 1].w = 0;	1283	pendings [ABSPRI (w)][w->pending - 1].w = 0;
712	w->pending = 0;	1284	w->pending = 0;
713	}	1285	}
714	}	1286	}
715		1287
716	static void	1288	inline void
717	ev_start (W w, int active)	1289	ev_start (EV_P_ W w, int active)
718	{	1290	{
		1291	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1292	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1293
719	w->active = active;	1294	w->active = active;
		1295	ev_ref (EV_A);
720	}	1296	}
721		1297
722	static void	1298	inline void
723	ev_stop (W w)	1299	ev_stop (EV_P_ W w)
724	{	1300	{
		1301	ev_unref (EV_A);
725	w->active = 0;	1302	w->active = 0;
726	}	1303	}
727		1304
728	/*****************************************************************************/	1305	/*****************************************************************************/
729		1306
730	void	1307	void
731	evio_start (struct ev_io *w)	1308	ev_io_start (EV_P_ struct ev_io *w)
732	{	1309	{
		1310	int fd = w->fd;
		1311
733	if (ev_is_active (w))	1312	if (ev_is_active (w))
734	return;	1313	return;
735		1314
736	int fd = w->fd;	1315	assert (("ev_io_start called with negative fd", fd >= 0));
737		1316
738	ev_start ((W)w, 1);	1317	ev_start (EV_A_ (W)w, 1);
739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1318	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
740	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1319	wlist_add ((WL *)&anfds[fd].head, (WL)w);
741		1320
742	++fdchangecnt;	1321	fd_change (EV_A_ fd);
743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
744	fdchanges [fdchangecnt - 1] = fd;
745
746	if (w->fd == 9)
747	printf ("start %p:%x\n", w, w->events);//D
748	}	1322	}
749		1323
750	void	1324	void
751	evio_stop (struct ev_io *w)	1325	ev_io_stop (EV_P_ struct ev_io *w)
752	{	1326	{
753	if (w->fd == 9)	1327	ev_clear_pending (EV_A_ (W)w);
754	printf ("stop %p:%x\n", w, w->events);//D
755	ev_clear ((W)w);
756	if (!ev_is_active (w))	1328	if (!ev_is_active (w))
757	return;	1329	return;
758		1330
		1331	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1332
759	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1333	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
760	ev_stop ((W)w);	1334	ev_stop (EV_A_ (W)w);
761		1335
762	++fdchangecnt;	1336	fd_change (EV_A_ w->fd);
763	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
764	fdchanges [fdchangecnt - 1] = w->fd;
765	}	1337	}
766		1338
767	void	1339	void
768	evtimer_start (struct ev_timer *w)	1340	ev_timer_start (EV_P_ struct ev_timer *w)
769	{	1341	{
770	if (ev_is_active (w))	1342	if (ev_is_active (w))
771	return;	1343	return;
772		1344
773	w->at += now;	1345	((WT)w)->at += mn_now;
774		1346
775	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1347	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
776		1348
777	ev_start ((W)w, ++timercnt);	1349	ev_start (EV_A_ (W)w, ++timercnt);
778	array_needsize (timers, timermax, timercnt, );	1350	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
779	timers [timercnt - 1] = w;	1351	timers [timercnt - 1] = w;
780	upheap ((WT *)timers, timercnt - 1);	1352	upheap ((WT *)timers, timercnt - 1);
781	}
782		1353
		1354	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1355	}
		1356
783	void	1357	void
784	evtimer_stop (struct ev_timer *w)	1358	ev_timer_stop (EV_P_ struct ev_timer *w)
785	{	1359	{
786	ev_clear ((W)w);	1360	ev_clear_pending (EV_A_ (W)w);
787	if (!ev_is_active (w))	1361	if (!ev_is_active (w))
788	return;	1362	return;
789		1363
		1364	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1365
790	if (w->active < timercnt--)	1366	if (((W)w)->active < timercnt--)
791	{	1367	{
792	timers [w->active - 1] = timers [timercnt];	1368	timers [((W)w)->active - 1] = timers [timercnt];
793	downheap ((WT *)timers, timercnt, w->active - 1);	1369	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
794	}	1370	}
795		1371
796	w->at = w->repeat;	1372	((WT)w)->at -= mn_now;
797		1373
798	ev_stop ((W)w);	1374	ev_stop (EV_A_ (W)w);
799	}	1375	}
800		1376
801	void	1377	void
802	evtimer_again (struct ev_timer *w)	1378	ev_timer_again (EV_P_ struct ev_timer *w)
803	{	1379	{
804	if (ev_is_active (w))	1380	if (ev_is_active (w))
805	{	1381	{
806	if (w->repeat)	1382	if (w->repeat)
807	{	1383	{
808	w->at = now + w->repeat;	1384	((WT)w)->at = mn_now + w->repeat;
809	downheap ((WT *)timers, timercnt, w->active - 1);	1385	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
810	}	1386	}
811	else	1387	else
812	evtimer_stop (w);	1388	ev_timer_stop (EV_A_ w);
813	}	1389	}
814	else if (w->repeat)	1390	else if (w->repeat)
		1391	{
		1392	w->at = w->repeat;
815	evtimer_start (w);	1393	ev_timer_start (EV_A_ w);
		1394	}
816	}	1395	}
817		1396
		1397	#if EV_PERIODICS
818	void	1398	void
819	evperiodic_start (struct ev_periodic *w)	1399	ev_periodic_start (EV_P_ struct ev_periodic *w)
820	{	1400	{
821	if (ev_is_active (w))	1401	if (ev_is_active (w))
822	return;	1402	return;
823		1403
824	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1404	if (w->reschedule_cb)
825		1405	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1406	else if (w->interval)
		1407	{
		1408	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
826	/* this formula differs from the one in periodic_reify because we do not always round up */	1409	/* this formula differs from the one in periodic_reify because we do not always round up */
827	if (w->interval)
828	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1410	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1411	}
829		1412
830	ev_start ((W)w, ++periodiccnt);	1413	ev_start (EV_A_ (W)w, ++periodiccnt);
831	array_needsize (periodics, periodicmax, periodiccnt, );	1414	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
832	periodics [periodiccnt - 1] = w;	1415	periodics [periodiccnt - 1] = w;
833	upheap ((WT *)periodics, periodiccnt - 1);	1416	upheap ((WT *)periodics, periodiccnt - 1);
834	}
835		1417
		1418	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1419	}
		1420
836	void	1421	void
837	evperiodic_stop (struct ev_periodic *w)	1422	ev_periodic_stop (EV_P_ struct ev_periodic *w)
838	{	1423	{
839	ev_clear ((W)w);	1424	ev_clear_pending (EV_A_ (W)w);
840	if (!ev_is_active (w))	1425	if (!ev_is_active (w))
841	return;	1426	return;
842		1427
		1428	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1429
843	if (w->active < periodiccnt--)	1430	if (((W)w)->active < periodiccnt--)
844	{	1431	{
845	periodics [w->active - 1] = periodics [periodiccnt];	1432	periodics [((W)w)->active - 1] = periodics [periodiccnt];
846	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1433	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
847	}	1434	}
848		1435
849	ev_stop ((W)w);	1436	ev_stop (EV_A_ (W)w);
850	}	1437	}
851		1438
852	void	1439	void
853	evsignal_start (struct ev_signal *w)	1440	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1441	{
		1442	/* TODO: use adjustheap and recalculation */
		1443	ev_periodic_stop (EV_A_ w);
		1444	ev_periodic_start (EV_A_ w);
		1445	}
		1446	#endif
		1447
		1448	void
		1449	ev_idle_start (EV_P_ struct ev_idle *w)
854	{	1450	{
855	if (ev_is_active (w))	1451	if (ev_is_active (w))
856	return;	1452	return;
857		1453
		1454	ev_start (EV_A_ (W)w, ++idlecnt);
		1455	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1456	idles [idlecnt - 1] = w;
		1457	}
		1458
		1459	void
		1460	ev_idle_stop (EV_P_ struct ev_idle *w)
		1461	{
		1462	ev_clear_pending (EV_A_ (W)w);
		1463	if (!ev_is_active (w))
		1464	return;
		1465
		1466	idles [((W)w)->active - 1] = idles [--idlecnt];
		1467	ev_stop (EV_A_ (W)w);
		1468	}
		1469
		1470	void
		1471	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1472	{
		1473	if (ev_is_active (w))
		1474	return;
		1475
		1476	ev_start (EV_A_ (W)w, ++preparecnt);
		1477	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1478	prepares [preparecnt - 1] = w;
		1479	}
		1480
		1481	void
		1482	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1483	{
		1484	ev_clear_pending (EV_A_ (W)w);
		1485	if (!ev_is_active (w))
		1486	return;
		1487
		1488	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1489	ev_stop (EV_A_ (W)w);
		1490	}
		1491
		1492	void
		1493	ev_check_start (EV_P_ struct ev_check *w)
		1494	{
		1495	if (ev_is_active (w))
		1496	return;
		1497
		1498	ev_start (EV_A_ (W)w, ++checkcnt);
		1499	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1500	checks [checkcnt - 1] = w;
		1501	}
		1502
		1503	void
		1504	ev_check_stop (EV_P_ struct ev_check *w)
		1505	{
		1506	ev_clear_pending (EV_A_ (W)w);
		1507	if (!ev_is_active (w))
		1508	return;
		1509
		1510	checks [((W)w)->active - 1] = checks [--checkcnt];
		1511	ev_stop (EV_A_ (W)w);
		1512	}
		1513
		1514	#ifndef SA_RESTART
		1515	# define SA_RESTART 0
		1516	#endif
		1517
		1518	void
		1519	ev_signal_start (EV_P_ struct ev_signal *w)
		1520	{
		1521	#if EV_MULTIPLICITY
		1522	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1523	#endif
		1524	if (ev_is_active (w))
		1525	return;
		1526
		1527	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1528
858	ev_start ((W)w, 1);	1529	ev_start (EV_A_ (W)w, 1);
859	array_needsize (signals, signalmax, w->signum, signals_init);	1530	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
860	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1531	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
861		1532
862	if (!w->next)	1533	if (!((WL)w)->next)
863	{	1534	{
		1535	#if _WIN32
		1536	signal (w->signum, sighandler);
		1537	#else
864	struct sigaction sa;	1538	struct sigaction sa;
865	sa.sa_handler = sighandler;	1539	sa.sa_handler = sighandler;
866	sigfillset (&sa.sa_mask);	1540	sigfillset (&sa.sa_mask);
867	sa.sa_flags = 0;	1541	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
868	sigaction (w->signum, &sa, 0);	1542	sigaction (w->signum, &sa, 0);
		1543	#endif
869	}	1544	}
870	}	1545	}
871		1546
872	void	1547	void
873	evsignal_stop (struct ev_signal *w)	1548	ev_signal_stop (EV_P_ struct ev_signal *w)
874	{	1549	{
875	ev_clear ((W)w);	1550	ev_clear_pending (EV_A_ (W)w);
876	if (!ev_is_active (w))	1551	if (!ev_is_active (w))
877	return;	1552	return;
878		1553
879	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1554	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
880	ev_stop ((W)w);	1555	ev_stop (EV_A_ (W)w);
881		1556
882	if (!signals [w->signum - 1].head)	1557	if (!signals [w->signum - 1].head)
883	signal (w->signum, SIG_DFL);	1558	signal (w->signum, SIG_DFL);
884	}	1559	}
885		1560
886	void evidle_start (struct ev_idle *w)	1561	void
		1562	ev_child_start (EV_P_ struct ev_child *w)
887	{	1563	{
		1564	#if EV_MULTIPLICITY
		1565	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1566	#endif
888	if (ev_is_active (w))	1567	if (ev_is_active (w))
889	return;	1568	return;
890		1569
891	ev_start ((W)w, ++idlecnt);
892	array_needsize (idles, idlemax, idlecnt, );
893	idles [idlecnt - 1] = w;
894	}
895
896	void evidle_stop (struct ev_idle *w)
897	{
898	ev_clear ((W)w);
899	if (ev_is_active (w))
900	return;
901
902	idles [w->active - 1] = idles [--idlecnt];
903	ev_stop ((W)w);
904	}
905
906	void evprepare_start (struct ev_prepare *w)
907	{
908	if (ev_is_active (w))
909	return;
910
911	ev_start ((W)w, ++preparecnt);
912	array_needsize (prepares, preparemax, preparecnt, );
913	prepares [preparecnt - 1] = w;
914	}
915
916	void evprepare_stop (struct ev_prepare *w)
917	{
918	ev_clear ((W)w);
919	if (ev_is_active (w))
920	return;
921
922	prepares [w->active - 1] = prepares [--preparecnt];
923	ev_stop ((W)w);
924	}
925
926	void evcheck_start (struct ev_check *w)
927	{
928	if (ev_is_active (w))
929	return;
930
931	ev_start ((W)w, ++checkcnt);
932	array_needsize (checks, checkmax, checkcnt, );
933	checks [checkcnt - 1] = w;
934	}
935
936	void evcheck_stop (struct ev_check *w)
937	{
938	ev_clear ((W)w);
939	if (ev_is_active (w))
940	return;
941
942	checks [w->active - 1] = checks [--checkcnt];
943	ev_stop ((W)w);
944	}
945
946	void evchild_start (struct ev_child *w)
947	{
948	if (ev_is_active (w))
949	return;
950
951	ev_start ((W)w, 1);	1570	ev_start (EV_A_ (W)w, 1);
952	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1571	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
953	}	1572	}
954		1573
		1574	void
955	void evchild_stop (struct ev_child *w)	1575	ev_child_stop (EV_P_ struct ev_child *w)
956	{	1576	{
957	ev_clear ((W)w);	1577	ev_clear_pending (EV_A_ (W)w);
958	if (ev_is_active (w))	1578	if (!ev_is_active (w))
959	return;	1579	return;
960		1580
961	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1581	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
962	ev_stop ((W)w);	1582	ev_stop (EV_A_ (W)w);
963	}	1583	}
964		1584
965	/*****************************************************************************/	1585	/*****************************************************************************/
966		1586
967	struct ev_once	1587	struct ev_once
…		…
971	void (*cb)(int revents, void *arg);	1591	void (*cb)(int revents, void *arg);
972	void *arg;	1592	void *arg;
973	};	1593	};
974		1594
975	static void	1595	static void
976	once_cb (struct ev_once *once, int revents)	1596	once_cb (EV_P_ struct ev_once *once, int revents)
977	{	1597	{
978	void (*cb)(int revents, void *arg) = once->cb;	1598	void (*cb)(int revents, void *arg) = once->cb;
979	void *arg = once->arg;	1599	void *arg = once->arg;
980		1600
981	evio_stop (&once->io);	1601	ev_io_stop (EV_A_ &once->io);
982	evtimer_stop (&once->to);	1602	ev_timer_stop (EV_A_ &once->to);
983	free (once);	1603	ev_free (once);
984		1604
985	cb (revents, arg);	1605	cb (revents, arg);
986	}	1606	}
987		1607
988	static void	1608	static void
989	once_cb_io (struct ev_io *w, int revents)	1609	once_cb_io (EV_P_ struct ev_io *w, int revents)
990	{	1610	{
991	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1611	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
992	}	1612	}
993		1613
994	static void	1614	static void
995	once_cb_to (struct ev_timer *w, int revents)	1615	once_cb_to (EV_P_ struct ev_timer *w, int revents)
996	{	1616	{
997	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1617	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
998	}	1618	}
999		1619
1000	void	1620	void
1001	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1621	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1002	{	1622	{
1003	struct ev_once *once = malloc (sizeof (struct ev_once));	1623	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1004		1624
1005	if (!once)	1625	if (!once)
1006	cb (EV_ERROR, arg);	1626	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1007	else	1627	else
1008	{	1628	{
1009	once->cb = cb;	1629	once->cb = cb;
1010	once->arg = arg;	1630	once->arg = arg;
1011		1631
1012	evw_init (&once->io, once_cb_io);	1632	ev_init (&once->io, once_cb_io);
1013
1014	if (fd >= 0)	1633	if (fd >= 0)
1015	{	1634	{
1016	evio_set (&once->io, fd, events);	1635	ev_io_set (&once->io, fd, events);
1017	evio_start (&once->io);	1636	ev_io_start (EV_A_ &once->io);
1018	}	1637	}
1019		1638
1020	evw_init (&once->to, once_cb_to);	1639	ev_init (&once->to, once_cb_to);
1021
1022	if (timeout >= 0.)	1640	if (timeout >= 0.)
1023	{	1641	{
1024	evtimer_set (&once->to, timeout, 0.);	1642	ev_timer_set (&once->to, timeout, 0.);
1025	evtimer_start (&once->to);	1643	ev_timer_start (EV_A_ &once->to);
1026	}	1644	}
1027	}	1645	}
1028	}	1646	}
1029		1647
1030	/*****************************************************************************/	1648	#ifdef __cplusplus
1031
1032	#if 0
1033
1034	struct ev_io wio;
1035
1036	static void
1037	sin_cb (struct ev_io *w, int revents)
1038	{
1039	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1040	}	1649	}
1041
1042	static void
1043	ocb (struct ev_timer *w, int revents)
1044	{
1045	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1046	evtimer_stop (w);
1047	evtimer_start (w);
1048	}
1049
1050	static void
1051	scb (struct ev_signal *w, int revents)
1052	{
1053	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1054	evio_stop (&wio);
1055	evio_start (&wio);
1056	}
1057
1058	static void
1059	gcb (struct ev_signal *w, int revents)
1060	{
1061	fprintf (stderr, "generic %x\n", revents);
1062
1063	}
1064
1065	int main (void)
1066	{
1067	ev_init (0);
1068
1069	evio_init (&wio, sin_cb, 0, EV_READ);
1070	evio_start (&wio);
1071
1072	struct ev_timer t[10000];
1073
1074	#if 0
1075	int i;
1076	for (i = 0; i < 10000; ++i)
1077	{
1078	struct ev_timer *w = t + i;
1079	evw_init (w, ocb, i);
1080	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1081	evtimer_start (w);
1082	if (drand48 () < 0.5)
1083	evtimer_stop (w);
1084	}
1085	#endif	1650	#endif
1086		1651
1087	struct ev_timer t1;
1088	evtimer_init (&t1, ocb, 5, 10);
1089	evtimer_start (&t1);
1090
1091	struct ev_signal sig;
1092	evsignal_init (&sig, scb, SIGQUIT);
1093	evsignal_start (&sig);
1094
1095	struct ev_check cw;
1096	evcheck_init (&cw, gcb);
1097	evcheck_start (&cw);
1098
1099	struct ev_idle iw;
1100	evidle_init (&iw, gcb);
1101	evidle_start (&iw);
1102
1103	ev_loop (0);
1104
1105	return 0;
1106	}
1107
1108	#endif
1109
1110
1111
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