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Comparing libev/ev.c (file contents):
Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs.
Revision 1.115 by root, Wed Nov 14 04:53:21 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	*/
29	#if EV_USE_CONFIG_H	31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
30	# include "config.h"	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
31	#endif	64	#endif
32		65
33	#include <math.h>	66	#include <math.h>
34	#include <stdlib.h>	67	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	68	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	69	#include <stddef.h>
39		70
40	#include <stdio.h>	71	#include <stdio.h>
41		72
42	#include <assert.h>	73	#include <assert.h>
43	#include <errno.h>	74	#include <errno.h>
44	#include <sys/types.h>	75	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	76	#include <time.h>
48		77
		78	#include <signal.h>
		79
		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
		89	# endif
		90	#endif
		91
		92	/**/
		93
49	#ifndef EV_USE_MONOTONIC	94	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	95	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	96	#endif
54		97
55	#ifndef EV_USE_SELECT	98	#ifndef EV_USE_SELECT
56	# define EV_USE_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
		108	# endif
57	#endif	109	#endif
58		110
59	#ifndef EV_USE_EPOLL	111	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	112	# define EV_USE_EPOLL 0
61	#endif	113	#endif
62		114
		115	#ifndef EV_USE_KQUEUE
		116	# define EV_USE_KQUEUE 0
		117	#endif
		118
63	#ifndef EV_USE_REALTIME	119	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	120	# define EV_USE_REALTIME 1
65	#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	/**/
66		146
67	#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) */
68	#define MAX_BLOCKTIME 59.731	148	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69	#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 */
70		151
		152	#ifdef EV_H
		153	# include EV_H
		154	#else
71	#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 */
72		174
73	typedef struct ev_watcher *W;	175	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	176	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	177	typedef struct ev_watcher_time *WT;
76		178
77	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	struct ev_loop default_loop_struct;
		264	static struct ev_loop *default_loop;
		265
		266	#else
		267
78	ev_tstamp ev_now;	268	ev_tstamp ev_rt_now;
79	int ev_method;	269	#define VAR(name,decl) static decl;
		270	#include "ev_vars.h"
		271	#undef VAR
80		272
81	static int have_monotonic; /* runtime */	273	static int default_loop;
82		274
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	275	#endif
84	static void (*method_modify)(int fd, int oev, int nev);
85	static void (*method_poll)(ev_tstamp timeout);
86		276
87	/*****************************************************************************/	277	/*****************************************************************************/
88		278
89	ev_tstamp	279	ev_tstamp
90	ev_time (void)	280	ev_time (void)
…		…
98	gettimeofday (&tv, 0);	288	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	289	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	290	#endif
101	}	291	}
102		292
103	static ev_tstamp	293	inline ev_tstamp
104	get_clock (void)	294	get_clock (void)
105	{	295	{
106	#if EV_USE_MONOTONIC	296	#if EV_USE_MONOTONIC
107	if (have_monotonic)	297	if (expect_true (have_monotonic))
108	{	298	{
109	struct timespec ts;	299	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	300	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	301	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	302	}
113	#endif	303	#endif
114		304
115	return ev_time ();	305	return ev_time ();
116	}	306	}
117		307
		308	#if EV_MULTIPLICITY
		309	ev_tstamp
		310	ev_now (EV_P)
		311	{
		312	return ev_rt_now;
		313	}
		314	#endif
		315
118	#define array_roundsize(base,n) ((n) | 4 & ~3)	316	#define array_roundsize(type,n) (((n) | 4) & ~3)
119		317
120	#define array_needsize(base,cur,cnt,init) \	318	#define array_needsize(type,base,cur,cnt,init) \
121	if ((cnt) > cur) \	319	if (expect_false ((cnt) > cur)) \
122	{ \	320	{ \
123	int newcnt = cur; \	321	int newcnt = cur; \
124	do \	322	do \
125	{ \	323	{ \
126	newcnt = array_roundsize (base, newcnt << 1); \	324	newcnt = array_roundsize (type, newcnt << 1); \
127	} \	325	} \
128	while ((cnt) > newcnt); \	326	while ((cnt) > newcnt); \
129	\	327	\
130	base = realloc (base, sizeof (*base) * (newcnt)); \	328	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
131	init (base + cur, newcnt - cur); \	329	init (base + cur, newcnt - cur); \
132	cur = newcnt; \	330	cur = newcnt; \
133	}	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;
134		343
135	/*****************************************************************************/	344	/*****************************************************************************/
136
137	typedef struct
138	{
139	struct ev_io *head;
140	int events;
141	} ANFD;
142
143	static ANFD *anfds;
144	static int anfdmax;
145		345
146	static void	346	static void
147	anfds_init (ANFD *base, int count)	347	anfds_init (ANFD *base, int count)
148	{	348	{
149	while (count--)	349	while (count--)
150	{	350	{
151	base->head = 0;	351	base->head = 0;
152	base->events = EV_NONE;	352	base->events = EV_NONE;
		353	base->reify = 0;
		354
153	++base;	355	++base;
154	}	356	}
155	}	357	}
156		358
157	typedef struct	359	void
		360	ev_feed_event (EV_P_ void *w, int revents)
158	{	361	{
159	W w;	362	W w_ = (W)w;
160	int events;
161	} ANPENDING;
162		363
163	static ANPENDING *pendings;	364	if (w_->pending)
164	static int pendingmax, pendingcnt;	365	{
		366	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		367	return;
		368	}
165		369
166	static void
167	event (W w, int events)
168	{
169	w->pending = ++pendingcnt;	370	w_->pending = ++pendingcnt [ABSPRI (w_)];
170	array_needsize (pendings, pendingmax, pendingcnt, );	371	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
171	pendings [pendingcnt - 1].w = w;	372	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
172	pendings [pendingcnt - 1].events = events;	373	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
173	}	374	}
174		375
175	static void	376	static void
176	queue_events (W *events, int eventcnt, int type)	377	queue_events (EV_P_ W *events, int eventcnt, int type)
177	{	378	{
178	int i;	379	int i;
179		380
180	for (i = 0; i < eventcnt; ++i)	381	for (i = 0; i < eventcnt; ++i)
181	event (events [i], type);	382	ev_feed_event (EV_A_ events [i], type);
182	}	383	}
183		384
184	static void	385	inline void
185	fd_event (int fd, int events)	386	fd_event (EV_P_ int fd, int revents)
186	{	387	{
187	ANFD *anfd = anfds + fd;	388	ANFD *anfd = anfds + fd;
188	struct ev_io *w;	389	struct ev_io *w;
189		390
190	for (w = anfd->head; w; w = w->next)	391	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
191	{	392	{
192	int ev = w->events & events;	393	int ev = w->events & revents;
193		394
194	if (ev)	395	if (ev)
195	event ((W)w, ev);	396	ev_feed_event (EV_A_ (W)w, ev);
196	}	397	}
		398	}
		399
		400	void
		401	ev_feed_fd_event (EV_P_ int fd, int revents)
		402	{
		403	fd_event (EV_A_ fd, revents);
197	}	404	}
198		405
199	/*****************************************************************************/	406	/*****************************************************************************/
200		407
201	static int *fdchanges;
202	static int fdchangemax, fdchangecnt;
203
204	static void	408	static void
205	fd_reify (void)	409	fd_reify (EV_P)
206	{	410	{
207	int i;	411	int i;
208		412
209	for (i = 0; i < fdchangecnt; ++i)	413	for (i = 0; i < fdchangecnt; ++i)
210	{	414	{
…		…
212	ANFD *anfd = anfds + fd;	416	ANFD *anfd = anfds + fd;
213	struct ev_io *w;	417	struct ev_io *w;
214		418
215	int events = 0;	419	int events = 0;
216		420
217	for (w = anfd->head; w; w = w->next)	421	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
218	events |= w->events;	422	events |= w->events;
219		423
220	anfd->events &= ~EV_REIFY;	424	#if EV_SELECT_IS_WINSOCKET
221		425	if (events)
222	if (anfd->events != events)
223	{	426	{
224	method_modify (fd, anfd->events, events);	427	unsigned long argp;
225	anfd->events = events;	428	anfd->handle = _get_osfhandle (fd);
		429	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
226	}	430	}
		431	#endif
		432
		433	anfd->reify = 0;
		434
		435	method_modify (EV_A_ fd, anfd->events, events);
		436	anfd->events = events;
227	}	437	}
228		438
229	fdchangecnt = 0;	439	fdchangecnt = 0;
230	}	440	}
231		441
232	static void	442	static void
233	fd_change (int fd)	443	fd_change (EV_P_ int fd)
234	{	444	{
235	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	445	if (anfds [fd].reify)
236	return;	446	return;
237		447
238	anfds [fd].events |= EV_REIFY;	448	anfds [fd].reify = 1;
239		449
240	++fdchangecnt;	450	++fdchangecnt;
241	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	451	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
242	fdchanges [fdchangecnt - 1] = fd;	452	fdchanges [fdchangecnt - 1] = fd;
243	}	453	}
244		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
		475	}
		476
245	/* called on EBADF to verify fds */	477	/* called on EBADF to verify fds */
246	static void	478	static void
247	fd_recheck (void)	479	fd_ebadf (EV_P)
248	{	480	{
249	int fd;	481	int fd;
250		482
251	for (fd = 0; fd < anfdmax; ++fd)	483	for (fd = 0; fd < anfdmax; ++fd)
252	if (anfds [fd].events)	484	if (anfds [fd].events)
253	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	485	if (!fd_valid (fd) == -1 && errno == EBADF)
254	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)
255	{	497	{
256	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	498	fd_kill (EV_A_ fd);
257	ev_io_stop (anfds [fd].head);	499	return;
258	}	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	}
259	}	516	}
260		517
261	/*****************************************************************************/	518	/*****************************************************************************/
262		519
263	static struct ev_timer **timers;
264	static int timermax, timercnt;
265
266	static struct ev_periodic **periodics;
267	static int periodicmax, periodiccnt;
268
269	static void	520	static void
270	upheap (WT *timers, int k)	521	upheap (WT *heap, int k)
271	{	522	{
272	WT w = timers [k];	523	WT w = heap [k];
273		524
274	while (k && timers [k >> 1]->at > w->at)	525	while (k && heap [k >> 1]->at > w->at)
275	{	526	{
276	timers [k] = timers [k >> 1];	527	heap [k] = heap [k >> 1];
277	timers [k]->active = k + 1;	528	((W)heap [k])->active = k + 1;
278	k >>= 1;	529	k >>= 1;
279	}	530	}
280		531
281	timers [k] = w;	532	heap [k] = w;
282	timers [k]->active = k + 1;	533	((W)heap [k])->active = k + 1;
283		534
284	}	535	}
285		536
286	static void	537	static void
287	downheap (WT *timers, int N, int k)	538	downheap (WT *heap, int N, int k)
288	{	539	{
289	WT w = timers [k];	540	WT w = heap [k];
290		541
291	while (k < (N >> 1))	542	while (k < (N >> 1))
292	{	543	{
293	int j = k << 1;	544	int j = k << 1;
294		545
295	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	546	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
296	++j;	547	++j;
297		548
298	if (w->at <= timers [j]->at)	549	if (w->at <= heap [j]->at)
299	break;	550	break;
300		551
301	timers [k] = timers [j];	552	heap [k] = heap [j];
302	timers [k]->active = k + 1;	553	((W)heap [k])->active = k + 1;
303	k = j;	554	k = j;
304	}	555	}
305		556
306	timers [k] = w;	557	heap [k] = w;
307	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);
308	}	566	}
309		567
310	/*****************************************************************************/	568	/*****************************************************************************/
311		569
312	typedef struct	570	typedef struct
313	{	571	{
314	struct ev_signal *head;	572	WL head;
315	sig_atomic_t gotsig;	573	sig_atomic_t volatile gotsig;
316	} ANSIG;	574	} ANSIG;
317		575
318	static ANSIG *signals;	576	static ANSIG *signals;
319	static int signalmax;	577	static int signalmax;
320		578
321	static int sigpipe [2];	579	static int sigpipe [2];
322	static sig_atomic_t gotsig;	580	static sig_atomic_t volatile gotsig;
323	static struct ev_io sigev;	581	static struct ev_io sigev;
324		582
325	static void	583	static void
326	signals_init (ANSIG *base, int count)	584	signals_init (ANSIG *base, int count)
327	{	585	{
328	while (count--)	586	while (count--)
329	{	587	{
330	base->head = 0;	588	base->head = 0;
331	base->gotsig = 0;	589	base->gotsig = 0;
		590
332	++base;	591	++base;
333	}	592	}
334	}	593	}
335		594
336	static void	595	static void
337	sighandler (int signum)	596	sighandler (int signum)
338	{	597	{
		598	#if _WIN32
		599	signal (signum, sighandler);
		600	#endif
		601
339	signals [signum - 1].gotsig = 1;	602	signals [signum - 1].gotsig = 1;
340		603
341	if (!gotsig)	604	if (!gotsig)
342	{	605	{
		606	int old_errno = errno;
343	gotsig = 1;	607	gotsig = 1;
344	write (sigpipe [1], &gotsig, 1);	608	write (sigpipe [1], &signum, 1);
		609	errno = old_errno;
345	}	610	}
346	}	611	}
347		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 == default_loop));
		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
348	static void	633	static void
349	sigcb (struct ev_io *iow, int revents)	634	sigcb (EV_P_ struct ev_io *iow, int revents)
350	{	635	{
351	struct ev_signal *w;
352	int sig;	636	int signum;
353		637
		638	read (sigpipe [0], &revents, 1);
354	gotsig = 0;	639	gotsig = 0;
355	read (sigpipe [0], &revents, 1);
356		640
357	for (sig = signalmax; sig--; )	641	for (signum = signalmax; signum--; )
358	if (signals [sig].gotsig)	642	if (signals [signum].gotsig)
359	{	643	ev_feed_signal_event (EV_A_ signum + 1);
360	signals [sig].gotsig = 0;
361
362	for (w = signals [sig].head; w; w = w->next)
363	event ((W)w, EV_SIGNAL);
364	}
365	}	644	}
366		645
367	static void	646	inline void
368	siginit (void)	647	fd_intern (int fd)
369	{	648	{
		649	#ifdef _WIN32
		650	int arg = 1;
		651	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		652	#else
370	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	653	fcntl (fd, F_SETFD, FD_CLOEXEC);
371	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
372
373	/* rather than sort out wether we really need nb, set it */
374	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	654	fcntl (fd, F_SETFL, O_NONBLOCK);
375	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	655	#endif
		656	}
		657
		658	static void
		659	siginit (EV_P)
		660	{
		661	fd_intern (sigpipe [0]);
		662	fd_intern (sigpipe [1]);
376		663
377	ev_io_set (&sigev, sigpipe [0], EV_READ);	664	ev_io_set (&sigev, sigpipe [0], EV_READ);
378	ev_io_start (&sigev);	665	ev_io_start (EV_A_ &sigev);
		666	ev_unref (EV_A); /* child watcher should not keep loop alive */
379	}	667	}
380		668
381	/*****************************************************************************/	669	/*****************************************************************************/
382		670
383	static struct ev_idle **idles;
384	static int idlemax, idlecnt;
385
386	static struct ev_prepare **prepares;
387	static int preparemax, preparecnt;
388
389	static struct ev_check **checks;
390	static int checkmax, checkcnt;
391
392	/*****************************************************************************/
393
394	static struct ev_child *childs [PID_HASHSIZE];	671	static struct ev_child *childs [PID_HASHSIZE];
		672
		673	#ifndef _WIN32
		674
395	static struct ev_signal childev;	675	static struct ev_signal childev;
396		676
397	#ifndef WCONTINUED	677	#ifndef WCONTINUED
398	# define WCONTINUED 0	678	# define WCONTINUED 0
399	#endif	679	#endif
400		680
401	static void	681	static void
402	childcb (struct ev_signal *sw, int revents)	682	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
403	{	683	{
404	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	{
405	int pid, status;	699	int pid, status;
406		700
407	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	701	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
408	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	702	{
409	if (w->pid == pid || w->pid == -1)	703	/* make sure we are called again until all childs have been reaped */
410	{	704	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
411	w->status = status;	705
412	event ((W)w, EV_CHILD);	706	child_reap (EV_A_ sw, pid, pid, status);
413	}	707	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		708	}
414	}	709	}
		710
		711	#endif
415		712
416	/*****************************************************************************/	713	/*****************************************************************************/
417		714
		715	#if EV_USE_KQUEUE
		716	# include "ev_kqueue.c"
		717	#endif
418	#if EV_USE_EPOLL	718	#if EV_USE_EPOLL
419	# include "ev_epoll.c"	719	# include "ev_epoll.c"
420	#endif	720	#endif
		721	#if EV_USE_POLL
		722	# include "ev_poll.c"
		723	#endif
421	#if EV_USE_SELECT	724	#if EV_USE_SELECT
422	# include "ev_select.c"	725	# include "ev_select.c"
423	#endif	726	#endif
424		727
425	int	728	int
…		…
432	ev_version_minor (void)	735	ev_version_minor (void)
433	{	736	{
434	return EV_VERSION_MINOR;	737	return EV_VERSION_MINOR;
435	}	738	}
436		739
437	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)
438	{	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	{
439	if (!ev_method)	761	if (!method)
440	{	762	{
441	#if EV_USE_MONOTONIC	763	#if EV_USE_MONOTONIC
442	{	764	{
443	struct timespec ts;	765	struct timespec ts;
444	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	766	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
445	have_monotonic = 1;	767	have_monotonic = 1;
446	}	768	}
447	#endif	769	#endif
448		770
449	ev_now = ev_time ();	771	ev_rt_now = ev_time ();
450	now = get_clock ();	772	mn_now = get_clock ();
		773	now_floor = mn_now;
451	diff = ev_now - now;	774	rtmn_diff = ev_rt_now - mn_now;
452		775
453	if (pipe (sigpipe))	776	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
454	return 0;	777	flags = atoi (getenv ("LIBEV_FLAGS"));
455		778
456	ev_method = EVMETHOD_NONE;	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
457	#if EV_USE_EPOLL	786	#if EV_USE_EPOLL
458	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	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);
459	#endif	791	#endif
460	#if EV_USE_SELECT	792	#if EV_USE_SELECT
461	if (ev_method == EVMETHOD_NONE) select_init (flags);	793	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
462	#endif	794	#endif
463		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	#else
		897	int
		898	#endif
		899	ev_default_loop (unsigned int flags)
		900	{
		901	if (sigpipe [0] == sigpipe [1])
		902	if (pipe (sigpipe))
		903	return 0;
		904
		905	if (!default_loop)
		906	{
		907	#if EV_MULTIPLICITY
		908	struct ev_loop *loop = default_loop = &default_loop_struct;
		909	#else
		910	default_loop = 1;
		911	#endif
		912
		913	loop_init (EV_A_ flags);
		914
464	if (ev_method)	915	if (ev_method (EV_A))
465	{	916	{
466	ev_watcher_init (&sigev, sigcb);
467	siginit ();	917	siginit (EV_A);
468		918
		919	#ifndef _WIN32
469	ev_signal_init (&childev, childcb, SIGCHLD);	920	ev_signal_init (&childev, childcb, SIGCHLD);
		921	ev_set_priority (&childev, EV_MAXPRI);
470	ev_signal_start (&childev);	922	ev_signal_start (EV_A_ &childev);
		923	ev_unref (EV_A); /* child watcher should not keep loop alive */
		924	#endif
471	}	925	}
		926	else
		927	default_loop = 0;
472	}	928	}
473		929
474	return ev_method;	930	return default_loop;
		931	}
		932
		933	void
		934	ev_default_destroy (void)
		935	{
		936	#if EV_MULTIPLICITY
		937	struct ev_loop *loop = default_loop;
		938	#endif
		939
		940	#ifndef _WIN32
		941	ev_ref (EV_A); /* child watcher */
		942	ev_signal_stop (EV_A_ &childev);
		943	#endif
		944
		945	ev_ref (EV_A); /* signal watcher */
		946	ev_io_stop (EV_A_ &sigev);
		947
		948	close (sigpipe [0]); sigpipe [0] = 0;
		949	close (sigpipe [1]); sigpipe [1] = 0;
		950
		951	loop_destroy (EV_A);
		952	}
		953
		954	void
		955	ev_default_fork (void)
		956	{
		957	#if EV_MULTIPLICITY
		958	struct ev_loop *loop = default_loop;
		959	#endif
		960
		961	if (method)
		962	postfork = 1;
475	}	963	}
476		964
477	/*****************************************************************************/	965	/*****************************************************************************/
478		966
479	void
480	ev_prefork (void)
481	{
482	/* nop */
483	}
484
485	void
486	ev_postfork_parent (void)
487	{
488	/* nop */
489	}
490
491	void
492	ev_postfork_child (void)
493	{
494	#if EV_USE_EPOLL
495	if (ev_method == EVMETHOD_EPOLL)
496	epoll_postfork_child ();
497	#endif
498
499	ev_io_stop (&sigev);
500	close (sigpipe [0]);
501	close (sigpipe [1]);
502	pipe (sigpipe);
503	siginit ();
504	}
505
506	/*****************************************************************************/
507
508	static void	967	static int
		968	any_pending (EV_P)
		969	{
		970	int pri;
		971
		972	for (pri = NUMPRI; pri--; )
		973	if (pendingcnt [pri])
		974	return 1;
		975
		976	return 0;
		977	}
		978
		979	static void
509	call_pending (void)	980	call_pending (EV_P)
510	{	981	{
		982	int pri;
		983
		984	for (pri = NUMPRI; pri--; )
511	while (pendingcnt)	985	while (pendingcnt [pri])
512	{	986	{
513	ANPENDING *p = pendings + --pendingcnt;	987	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
514		988
515	if (p->w)	989	if (p->w)
516	{	990	{
517	p->w->pending = 0;	991	p->w->pending = 0;
518	p->w->cb (p->w, p->events);	992	EV_CB_INVOKE (p->w, p->events);
519	}	993	}
520	}	994	}
521	}	995	}
522		996
523	static void	997	static void
524	timers_reify (void)	998	timers_reify (EV_P)
525	{	999	{
526	while (timercnt && timers [0]->at <= now)	1000	while (timercnt && ((WT)timers [0])->at <= mn_now)
527	{	1001	{
528	struct ev_timer *w = timers [0];	1002	struct ev_timer *w = timers [0];
		1003
		1004	assert (("inactive timer on timer heap detected", ev_is_active (w)));
529		1005
530	/* first reschedule or stop timer */	1006	/* first reschedule or stop timer */
531	if (w->repeat)	1007	if (w->repeat)
532	{	1008	{
		1009	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1010
533	w->at = now + w->repeat;	1011	((WT)w)->at += w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));	1012	if (((WT)w)->at < mn_now)
		1013	((WT)w)->at = mn_now;
		1014
535	downheap ((WT *)timers, timercnt, 0);	1015	downheap ((WT *)timers, timercnt, 0);
536	}	1016	}
537	else	1017	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	1018	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539		1019
540	event ((W)w, EV_TIMEOUT);	1020	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
541	}	1021	}
542	}	1022	}
543		1023
		1024	#if EV_PERIODICS
544	static void	1025	static void
545	periodics_reify (void)	1026	periodics_reify (EV_P)
546	{	1027	{
547	while (periodiccnt && periodics [0]->at <= ev_now)	1028	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
548	{	1029	{
549	struct ev_periodic *w = periodics [0];	1030	struct ev_periodic *w = periodics [0];
550		1031
		1032	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1033
551	/* first reschedule or stop timer */	1034	/* first reschedule or stop timer */
552	if (w->interval)	1035	if (w->reschedule_cb)
553	{	1036	{
		1037	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1038	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1039	downheap ((WT *)periodics, periodiccnt, 0);
		1040	}
		1041	else if (w->interval)
		1042	{
554	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1043	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
555	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1044	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
556	downheap ((WT *)periodics, periodiccnt, 0);	1045	downheap ((WT *)periodics, periodiccnt, 0);
557	}	1046	}
558	else	1047	else
559	ev_periodic_stop (w); /* nonrepeating: stop timer */	1048	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
560		1049
561	event ((W)w, EV_TIMEOUT);	1050	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
562	}	1051	}
563	}	1052	}
564		1053
565	static void	1054	static void
566	periodics_reschedule (ev_tstamp diff)	1055	periodics_reschedule (EV_P)
567	{	1056	{
568	int i;	1057	int i;
569		1058
570	/* adjust periodics after time jump */	1059	/* adjust periodics after time jump */
571	for (i = 0; i < periodiccnt; ++i)	1060	for (i = 0; i < periodiccnt; ++i)
572	{	1061	{
573	struct ev_periodic *w = periodics [i];	1062	struct ev_periodic *w = periodics [i];
574		1063
		1064	if (w->reschedule_cb)
		1065	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
575	if (w->interval)	1066	else if (w->interval)
		1067	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1068	}
		1069
		1070	/* now rebuild the heap */
		1071	for (i = periodiccnt >> 1; i--; )
		1072	downheap ((WT *)periodics, periodiccnt, i);
		1073	}
		1074	#endif
		1075
		1076	inline int
		1077	time_update_monotonic (EV_P)
		1078	{
		1079	mn_now = get_clock ();
		1080
		1081	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1082	{
		1083	ev_rt_now = rtmn_diff + mn_now;
		1084	return 0;
		1085	}
		1086	else
		1087	{
		1088	now_floor = mn_now;
		1089	ev_rt_now = ev_time ();
		1090	return 1;
		1091	}
		1092	}
		1093
		1094	static void
		1095	time_update (EV_P)
		1096	{
		1097	int i;
		1098
		1099	#if EV_USE_MONOTONIC
		1100	if (expect_true (have_monotonic))
		1101	{
		1102	if (time_update_monotonic (EV_A))
576	{	1103	{
577	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1104	ev_tstamp odiff = rtmn_diff;
578		1105
579	if (fabs (diff) >= 1e-4)	1106	for (i = 4; --i; ) /* loop a few times, before making important decisions */
580	{	1107	{
581	ev_periodic_stop (w);	1108	rtmn_diff = ev_rt_now - mn_now;
582	ev_periodic_start (w);
583		1109
584	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1110	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1111	return; /* all is well */
		1112
		1113	ev_rt_now = ev_time ();
		1114	mn_now = get_clock ();
		1115	now_floor = mn_now;
585	}	1116	}
		1117
		1118	# if EV_PERIODICS
		1119	periodics_reschedule (EV_A);
		1120	# endif
		1121	/* no timer adjustment, as the monotonic clock doesn't jump */
		1122	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
586	}	1123	}
587	}	1124	}
588	}	1125	else
589		1126	#endif
590	static void	1127	{
591	time_update (void)
592	{
593	int i;
594
595	ev_now = ev_time ();	1128	ev_rt_now = ev_time ();
596		1129
597	if (have_monotonic)	1130	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
598	{
599	ev_tstamp odiff = diff;
600
601	for (i = 4; --i; ) /* loop a few times, before making important decisions */
602	{	1131	{
603	now = get_clock ();	1132	#if EV_PERIODICS
604	diff = ev_now - now;
605
606	if (fabs (odiff - diff) < MIN_TIMEJUMP)
607	return; /* all is well */
608
609	ev_now = ev_time ();
610	}
611
612	periodics_reschedule (diff - odiff);
613	/* no timer adjustment, as the monotonic clock doesn't jump */
614	}
615	else
616	{
617	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
618	{
619	periodics_reschedule (ev_now - now);	1133	periodics_reschedule (EV_A);
		1134	#endif
620		1135
621	/* adjust timers. this is easy, as the offset is the same for all */	1136	/* adjust timers. this is easy, as the offset is the same for all */
622	for (i = 0; i < timercnt; ++i)	1137	for (i = 0; i < timercnt; ++i)
623	timers [i]->at += diff;	1138	((WT)timers [i])->at += ev_rt_now - mn_now;
624	}	1139	}
625		1140
626	now = ev_now;	1141	mn_now = ev_rt_now;
627	}	1142	}
628	}	1143	}
629		1144
630	int ev_loop_done;	1145	void
		1146	ev_ref (EV_P)
		1147	{
		1148	++activecnt;
		1149	}
631		1150
		1151	void
		1152	ev_unref (EV_P)
		1153	{
		1154	--activecnt;
		1155	}
		1156
		1157	static int loop_done;
		1158
		1159	void
632	void ev_loop (int flags)	1160	ev_loop (EV_P_ int flags)
633	{	1161	{
634	double block;	1162	double block;
635	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1163	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
636		1164
637	do	1165	while (activecnt)
638	{	1166	{
639	/* queue check watchers (and execute them) */	1167	/* queue check watchers (and execute them) */
640	if (preparecnt)	1168	if (expect_false (preparecnt))
641	{	1169	{
642	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1170	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
643	call_pending ();	1171	call_pending (EV_A);
644	}	1172	}
645		1173
		1174	/* we might have forked, so reify kernel state if necessary */
		1175	if (expect_false (postfork))
		1176	loop_fork (EV_A);
		1177
646	/* update fd-related kernel structures */	1178	/* update fd-related kernel structures */
647	fd_reify ();	1179	fd_reify (EV_A);
648		1180
649	/* calculate blocking time */	1181	/* calculate blocking time */
650		1182
651	/* we only need this for !monotonic clockor timers, but as we basically	1183	/* we only need this for !monotonic clock or timers, but as we basically
652	always have timers, we just calculate it always */	1184	always have timers, we just calculate it always */
		1185	#if EV_USE_MONOTONIC
		1186	if (expect_true (have_monotonic))
		1187	time_update_monotonic (EV_A);
		1188	else
		1189	#endif
		1190	{
653	ev_now = ev_time ();	1191	ev_rt_now = ev_time ();
		1192	mn_now = ev_rt_now;
		1193	}
654		1194
655	if (flags & EVLOOP_NONBLOCK || idlecnt)	1195	if (flags & EVLOOP_NONBLOCK || idlecnt)
656	block = 0.;	1196	block = 0.;
657	else	1197	else
658	{	1198	{
659	block = MAX_BLOCKTIME;	1199	block = MAX_BLOCKTIME;
660		1200
661	if (timercnt)	1201	if (timercnt)
662	{	1202	{
663	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1203	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
664	if (block > to) block = to;	1204	if (block > to) block = to;
665	}	1205	}
666		1206
		1207	#if EV_PERIODICS
667	if (periodiccnt)	1208	if (periodiccnt)
668	{	1209	{
669	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1210	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
670	if (block > to) block = to;	1211	if (block > to) block = to;
671	}	1212	}
		1213	#endif
672		1214
673	if (block < 0.) block = 0.;	1215	if (block < 0.) block = 0.;
674	}	1216	}
675		1217
676	method_poll (block);	1218	method_poll (EV_A_ block);
677		1219
678	/* update ev_now, do magic */	1220	/* update ev_rt_now, do magic */
679	time_update ();	1221	time_update (EV_A);
680		1222
681	/* queue pending timers and reschedule them */	1223	/* queue pending timers and reschedule them */
682	timers_reify (); /* relative timers called last */	1224	timers_reify (EV_A); /* relative timers called last */
		1225	#if EV_PERIODICS
683	periodics_reify (); /* absolute timers called first */	1226	periodics_reify (EV_A); /* absolute timers called first */
		1227	#endif
684		1228
685	/* queue idle watchers unless io or timers are pending */	1229	/* queue idle watchers unless io or timers are pending */
686	if (!pendingcnt)	1230	if (idlecnt && !any_pending (EV_A))
687	queue_events ((W *)idles, idlecnt, EV_IDLE);	1231	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
688		1232
689	/* queue check watchers, to be executed first */	1233	/* queue check watchers, to be executed first */
690	if (checkcnt)	1234	if (checkcnt)
691	queue_events ((W *)checks, checkcnt, EV_CHECK);	1235	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
692		1236
693	call_pending ();	1237	call_pending (EV_A);
694	}
695	while (!ev_loop_done);
696		1238
		1239	if (loop_done)
		1240	break;
		1241	}
		1242
697	if (ev_loop_done != 2)	1243	if (loop_done != 2)
698	ev_loop_done = 0;	1244	loop_done = 0;
		1245	}
		1246
		1247	void
		1248	ev_unloop (EV_P_ int how)
		1249	{
		1250	loop_done = how;
699	}	1251	}
700		1252
701	/*****************************************************************************/	1253	/*****************************************************************************/
702		1254
703	static void	1255	inline void
704	wlist_add (WL *head, WL elem)	1256	wlist_add (WL *head, WL elem)
705	{	1257	{
706	elem->next = *head;	1258	elem->next = *head;
707	*head = elem;	1259	*head = elem;
708	}	1260	}
709		1261
710	static void	1262	inline void
711	wlist_del (WL *head, WL elem)	1263	wlist_del (WL *head, WL elem)
712	{	1264	{
713	while (*head)	1265	while (*head)
714	{	1266	{
715	if (*head == elem)	1267	if (*head == elem)
…		…
720		1272
721	head = &(*head)->next;	1273	head = &(*head)->next;
722	}	1274	}
723	}	1275	}
724		1276
725	static void	1277	inline void
726	ev_clear (W w)	1278	ev_clear_pending (EV_P_ W w)
727	{	1279	{
728	if (w->pending)	1280	if (w->pending)
729	{	1281	{
730	pendings [w->pending - 1].w = 0;	1282	pendings [ABSPRI (w)][w->pending - 1].w = 0;
731	w->pending = 0;	1283	w->pending = 0;
732	}	1284	}
733	}	1285	}
734		1286
735	static void	1287	inline void
736	ev_start (W w, int active)	1288	ev_start (EV_P_ W w, int active)
737	{	1289	{
		1290	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1291	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1292
738	w->active = active;	1293	w->active = active;
		1294	ev_ref (EV_A);
739	}	1295	}
740		1296
741	static void	1297	inline void
742	ev_stop (W w)	1298	ev_stop (EV_P_ W w)
743	{	1299	{
		1300	ev_unref (EV_A);
744	w->active = 0;	1301	w->active = 0;
745	}	1302	}
746		1303
747	/*****************************************************************************/	1304	/*****************************************************************************/
748		1305
749	void	1306	void
750	ev_io_start (struct ev_io *w)	1307	ev_io_start (EV_P_ struct ev_io *w)
751	{	1308	{
		1309	int fd = w->fd;
		1310
752	if (ev_is_active (w))	1311	if (ev_is_active (w))
753	return;	1312	return;
754		1313
755	int fd = w->fd;	1314	assert (("ev_io_start called with negative fd", fd >= 0));
756		1315
757	ev_start ((W)w, 1);	1316	ev_start (EV_A_ (W)w, 1);
758	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1317	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
759	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1318	wlist_add ((WL *)&anfds[fd].head, (WL)w);
760		1319
761	fd_change (fd);	1320	fd_change (EV_A_ fd);
762	}	1321	}
763		1322
764	void	1323	void
765	ev_io_stop (struct ev_io *w)	1324	ev_io_stop (EV_P_ struct ev_io *w)
766	{	1325	{
767	ev_clear ((W)w);	1326	ev_clear_pending (EV_A_ (W)w);
768	if (!ev_is_active (w))	1327	if (!ev_is_active (w))
769	return;	1328	return;
770		1329
		1330	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1331
771	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1332	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
772	ev_stop ((W)w);	1333	ev_stop (EV_A_ (W)w);
773		1334
774	fd_change (w->fd);	1335	fd_change (EV_A_ w->fd);
775	}	1336	}
776		1337
777	void	1338	void
778	ev_timer_start (struct ev_timer *w)	1339	ev_timer_start (EV_P_ struct ev_timer *w)
779	{	1340	{
780	if (ev_is_active (w))	1341	if (ev_is_active (w))
781	return;	1342	return;
782		1343
783	w->at += now;	1344	((WT)w)->at += mn_now;
784		1345
785	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1346	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
786		1347
787	ev_start ((W)w, ++timercnt);	1348	ev_start (EV_A_ (W)w, ++timercnt);
788	array_needsize (timers, timermax, timercnt, );	1349	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
789	timers [timercnt - 1] = w;	1350	timers [timercnt - 1] = w;
790	upheap ((WT *)timers, timercnt - 1);	1351	upheap ((WT *)timers, timercnt - 1);
791	}
792		1352
		1353	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1354	}
		1355
793	void	1356	void
794	ev_timer_stop (struct ev_timer *w)	1357	ev_timer_stop (EV_P_ struct ev_timer *w)
795	{	1358	{
796	ev_clear ((W)w);	1359	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1360	if (!ev_is_active (w))
798	return;	1361	return;
799		1362
		1363	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1364
800	if (w->active < timercnt--)	1365	if (((W)w)->active < timercnt--)
801	{	1366	{
802	timers [w->active - 1] = timers [timercnt];	1367	timers [((W)w)->active - 1] = timers [timercnt];
803	downheap ((WT *)timers, timercnt, w->active - 1);	1368	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
804	}	1369	}
805		1370
806	w->at = w->repeat;	1371	((WT)w)->at -= mn_now;
807		1372
808	ev_stop ((W)w);	1373	ev_stop (EV_A_ (W)w);
809	}	1374	}
810		1375
811	void	1376	void
812	ev_timer_again (struct ev_timer *w)	1377	ev_timer_again (EV_P_ struct ev_timer *w)
813	{	1378	{
814	if (ev_is_active (w))	1379	if (ev_is_active (w))
815	{	1380	{
816	if (w->repeat)	1381	if (w->repeat)
817	{	1382	{
818	w->at = now + w->repeat;	1383	((WT)w)->at = mn_now + w->repeat;
819	downheap ((WT *)timers, timercnt, w->active - 1);	1384	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1385	}
821	else	1386	else
822	ev_timer_stop (w);	1387	ev_timer_stop (EV_A_ w);
823	}	1388	}
824	else if (w->repeat)	1389	else if (w->repeat)
		1390	{
		1391	w->at = w->repeat;
825	ev_timer_start (w);	1392	ev_timer_start (EV_A_ w);
		1393	}
826	}	1394	}
827		1395
		1396	#if EV_PERIODICS
828	void	1397	void
829	ev_periodic_start (struct ev_periodic *w)	1398	ev_periodic_start (EV_P_ struct ev_periodic *w)
830	{	1399	{
831	if (ev_is_active (w))	1400	if (ev_is_active (w))
832	return;	1401	return;
833		1402
834	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1403	if (w->reschedule_cb)
835		1404	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1405	else if (w->interval)
		1406	{
		1407	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
836	/* this formula differs from the one in periodic_reify because we do not always round up */	1408	/* this formula differs from the one in periodic_reify because we do not always round up */
837	if (w->interval)
838	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1409	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1410	}
839		1411
840	ev_start ((W)w, ++periodiccnt);	1412	ev_start (EV_A_ (W)w, ++periodiccnt);
841	array_needsize (periodics, periodicmax, periodiccnt, );	1413	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
842	periodics [periodiccnt - 1] = w;	1414	periodics [periodiccnt - 1] = w;
843	upheap ((WT *)periodics, periodiccnt - 1);	1415	upheap ((WT *)periodics, periodiccnt - 1);
844	}
845		1416
		1417	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1418	}
		1419
846	void	1420	void
847	ev_periodic_stop (struct ev_periodic *w)	1421	ev_periodic_stop (EV_P_ struct ev_periodic *w)
848	{	1422	{
849	ev_clear ((W)w);	1423	ev_clear_pending (EV_A_ (W)w);
850	if (!ev_is_active (w))	1424	if (!ev_is_active (w))
851	return;	1425	return;
852		1426
		1427	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1428
853	if (w->active < periodiccnt--)	1429	if (((W)w)->active < periodiccnt--)
854	{	1430	{
855	periodics [w->active - 1] = periodics [periodiccnt];	1431	periodics [((W)w)->active - 1] = periodics [periodiccnt];
856	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1432	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
857	}	1433	}
858		1434
859	ev_stop ((W)w);	1435	ev_stop (EV_A_ (W)w);
860	}	1436	}
861		1437
862	void	1438	void
		1439	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1440	{
		1441	/* TODO: use adjustheap and recalculation */
		1442	ev_periodic_stop (EV_A_ w);
		1443	ev_periodic_start (EV_A_ w);
		1444	}
		1445	#endif
		1446
		1447	void
863	ev_signal_start (struct ev_signal *w)	1448	ev_idle_start (EV_P_ struct ev_idle *w)
864	{	1449	{
865	if (ev_is_active (w))	1450	if (ev_is_active (w))
866	return;	1451	return;
867		1452
		1453	ev_start (EV_A_ (W)w, ++idlecnt);
		1454	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1455	idles [idlecnt - 1] = w;
		1456	}
		1457
		1458	void
		1459	ev_idle_stop (EV_P_ struct ev_idle *w)
		1460	{
		1461	ev_clear_pending (EV_A_ (W)w);
		1462	if (!ev_is_active (w))
		1463	return;
		1464
		1465	idles [((W)w)->active - 1] = idles [--idlecnt];
		1466	ev_stop (EV_A_ (W)w);
		1467	}
		1468
		1469	void
		1470	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1471	{
		1472	if (ev_is_active (w))
		1473	return;
		1474
		1475	ev_start (EV_A_ (W)w, ++preparecnt);
		1476	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1477	prepares [preparecnt - 1] = w;
		1478	}
		1479
		1480	void
		1481	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1482	{
		1483	ev_clear_pending (EV_A_ (W)w);
		1484	if (!ev_is_active (w))
		1485	return;
		1486
		1487	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1488	ev_stop (EV_A_ (W)w);
		1489	}
		1490
		1491	void
		1492	ev_check_start (EV_P_ struct ev_check *w)
		1493	{
		1494	if (ev_is_active (w))
		1495	return;
		1496
		1497	ev_start (EV_A_ (W)w, ++checkcnt);
		1498	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1499	checks [checkcnt - 1] = w;
		1500	}
		1501
		1502	void
		1503	ev_check_stop (EV_P_ struct ev_check *w)
		1504	{
		1505	ev_clear_pending (EV_A_ (W)w);
		1506	if (!ev_is_active (w))
		1507	return;
		1508
		1509	checks [((W)w)->active - 1] = checks [--checkcnt];
		1510	ev_stop (EV_A_ (W)w);
		1511	}
		1512
		1513	#ifndef SA_RESTART
		1514	# define SA_RESTART 0
		1515	#endif
		1516
		1517	void
		1518	ev_signal_start (EV_P_ struct ev_signal *w)
		1519	{
		1520	#if EV_MULTIPLICITY
		1521	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1522	#endif
		1523	if (ev_is_active (w))
		1524	return;
		1525
		1526	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1527
868	ev_start ((W)w, 1);	1528	ev_start (EV_A_ (W)w, 1);
869	array_needsize (signals, signalmax, w->signum, signals_init);	1529	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
870	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1530	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
871		1531
872	if (!w->next)	1532	if (!((WL)w)->next)
873	{	1533	{
		1534	#if _WIN32
		1535	signal (w->signum, sighandler);
		1536	#else
874	struct sigaction sa;	1537	struct sigaction sa;
875	sa.sa_handler = sighandler;	1538	sa.sa_handler = sighandler;
876	sigfillset (&sa.sa_mask);	1539	sigfillset (&sa.sa_mask);
877	sa.sa_flags = 0;	1540	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
878	sigaction (w->signum, &sa, 0);	1541	sigaction (w->signum, &sa, 0);
		1542	#endif
879	}	1543	}
880	}	1544	}
881		1545
882	void	1546	void
883	ev_signal_stop (struct ev_signal *w)	1547	ev_signal_stop (EV_P_ struct ev_signal *w)
884	{	1548	{
885	ev_clear ((W)w);	1549	ev_clear_pending (EV_A_ (W)w);
886	if (!ev_is_active (w))	1550	if (!ev_is_active (w))
887	return;	1551	return;
888		1552
889	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1553	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
890	ev_stop ((W)w);	1554	ev_stop (EV_A_ (W)w);
891		1555
892	if (!signals [w->signum - 1].head)	1556	if (!signals [w->signum - 1].head)
893	signal (w->signum, SIG_DFL);	1557	signal (w->signum, SIG_DFL);
894	}	1558	}
895		1559
896	void	1560	void
897	ev_idle_start (struct ev_idle *w)	1561	ev_child_start (EV_P_ struct ev_child *w)
898	{	1562	{
		1563	#if EV_MULTIPLICITY
		1564	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1565	#endif
899	if (ev_is_active (w))	1566	if (ev_is_active (w))
900	return;	1567	return;
901		1568
902	ev_start ((W)w, ++idlecnt);
903	array_needsize (idles, idlemax, idlecnt, );
904	idles [idlecnt - 1] = w;
905	}
906
907	void
908	ev_idle_stop (struct ev_idle *w)
909	{
910	ev_clear ((W)w);
911	if (ev_is_active (w))
912	return;
913
914	idles [w->active - 1] = idles [--idlecnt];
915	ev_stop ((W)w);
916	}
917
918	void
919	ev_prepare_start (struct ev_prepare *w)
920	{
921	if (ev_is_active (w))
922	return;
923
924	ev_start ((W)w, ++preparecnt);
925	array_needsize (prepares, preparemax, preparecnt, );
926	prepares [preparecnt - 1] = w;
927	}
928
929	void
930	ev_prepare_stop (struct ev_prepare *w)
931	{
932	ev_clear ((W)w);
933	if (ev_is_active (w))
934	return;
935
936	prepares [w->active - 1] = prepares [--preparecnt];
937	ev_stop ((W)w);
938	}
939
940	void
941	ev_check_start (struct ev_check *w)
942	{
943	if (ev_is_active (w))
944	return;
945
946	ev_start ((W)w, ++checkcnt);
947	array_needsize (checks, checkmax, checkcnt, );
948	checks [checkcnt - 1] = w;
949	}
950
951	void
952	ev_check_stop (struct ev_check *w)
953	{
954	ev_clear ((W)w);
955	if (ev_is_active (w))
956	return;
957
958	checks [w->active - 1] = checks [--checkcnt];
959	ev_stop ((W)w);
960	}
961
962	void
963	ev_child_start (struct ev_child *w)
964	{
965	if (ev_is_active (w))
966	return;
967
968	ev_start ((W)w, 1);	1569	ev_start (EV_A_ (W)w, 1);
969	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1570	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970	}	1571	}
971		1572
972	void	1573	void
973	ev_child_stop (struct ev_child *w)	1574	ev_child_stop (EV_P_ struct ev_child *w)
974	{	1575	{
975	ev_clear ((W)w);	1576	ev_clear_pending (EV_A_ (W)w);
976	if (ev_is_active (w))	1577	if (!ev_is_active (w))
977	return;	1578	return;
978		1579
979	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1580	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	ev_stop ((W)w);	1581	ev_stop (EV_A_ (W)w);
981	}	1582	}
982		1583
983	/*****************************************************************************/	1584	/*****************************************************************************/
984		1585
985	struct ev_once	1586	struct ev_once
…		…
989	void (*cb)(int revents, void *arg);	1590	void (*cb)(int revents, void *arg);
990	void *arg;	1591	void *arg;
991	};	1592	};
992		1593
993	static void	1594	static void
994	once_cb (struct ev_once *once, int revents)	1595	once_cb (EV_P_ struct ev_once *once, int revents)
995	{	1596	{
996	void (*cb)(int revents, void *arg) = once->cb;	1597	void (*cb)(int revents, void *arg) = once->cb;
997	void *arg = once->arg;	1598	void *arg = once->arg;
998		1599
999	ev_io_stop (&once->io);	1600	ev_io_stop (EV_A_ &once->io);
1000	ev_timer_stop (&once->to);	1601	ev_timer_stop (EV_A_ &once->to);
1001	free (once);	1602	ev_free (once);
1002		1603
1003	cb (revents, arg);	1604	cb (revents, arg);
1004	}	1605	}
1005		1606
1006	static void	1607	static void
1007	once_cb_io (struct ev_io *w, int revents)	1608	once_cb_io (EV_P_ struct ev_io *w, int revents)
1008	{	1609	{
1009	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1610	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1010	}	1611	}
1011		1612
1012	static void	1613	static void
1013	once_cb_to (struct ev_timer *w, int revents)	1614	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1014	{	1615	{
1015	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1616	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1016	}	1617	}
1017		1618
1018	void	1619	void
1019	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1620	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1020	{	1621	{
1021	struct ev_once *once = malloc (sizeof (struct ev_once));	1622	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1022		1623
1023	if (!once)	1624	if (!once)
1024	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1625	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1025	else	1626	else
1026	{	1627	{
1027	once->cb = cb;	1628	once->cb = cb;
1028	once->arg = arg;	1629	once->arg = arg;
1029		1630
1030	ev_watcher_init (&once->io, once_cb_io);	1631	ev_init (&once->io, once_cb_io);
1031	if (fd >= 0)	1632	if (fd >= 0)
1032	{	1633	{
1033	ev_io_set (&once->io, fd, events);	1634	ev_io_set (&once->io, fd, events);
1034	ev_io_start (&once->io);	1635	ev_io_start (EV_A_ &once->io);
1035	}	1636	}
1036		1637
1037	ev_watcher_init (&once->to, once_cb_to);	1638	ev_init (&once->to, once_cb_to);
1038	if (timeout >= 0.)	1639	if (timeout >= 0.)
1039	{	1640	{
1040	ev_timer_set (&once->to, timeout, 0.);	1641	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1642	ev_timer_start (EV_A_ &once->to);
1042	}	1643	}
1043	}	1644	}
1044	}	1645	}
1045		1646
1046	/*****************************************************************************/	1647	#ifdef __cplusplus
1047
1048	#if 0
1049
1050	struct ev_io wio;
1051
1052	static void
1053	sin_cb (struct ev_io *w, int revents)
1054	{
1055	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056	}	1648	}
1057
1058	static void
1059	ocb (struct ev_timer *w, int revents)
1060	{
1061	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062	ev_timer_stop (w);
1063	ev_timer_start (w);
1064	}
1065
1066	static void
1067	scb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070	ev_io_stop (&wio);
1071	ev_io_start (&wio);
1072	}
1073
1074	static void
1075	gcb (struct ev_signal *w, int revents)
1076	{
1077	fprintf (stderr, "generic %x\n", revents);
1078
1079	}
1080
1081	int main (void)
1082	{
1083	ev_init (0);
1084
1085	ev_io_init (&wio, sin_cb, 0, EV_READ);
1086	ev_io_start (&wio);
1087
1088	struct ev_timer t[10000];
1089
1090	#if 0
1091	int i;
1092	for (i = 0; i < 10000; ++i)
1093	{
1094	struct ev_timer *w = t + i;
1095	ev_watcher_init (w, ocb, i);
1096	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097	ev_timer_start (w);
1098	if (drand48 () < 0.5)
1099	ev_timer_stop (w);
1100	}
1101	#endif	1649	#endif
1102		1650
1103	struct ev_timer t1;
1104	ev_timer_init (&t1, ocb, 5, 10);
1105	ev_timer_start (&t1);
1106
1107	struct ev_signal sig;
1108	ev_signal_init (&sig, scb, SIGQUIT);
1109	ev_signal_start (&sig);
1110
1111	struct ev_check cw;
1112	ev_check_init (&cw, gcb);
1113	ev_check_start (&cw);
1114
1115	struct ev_idle iw;
1116	ev_idle_init (&iw, gcb);
1117	ev_idle_start (&iw);
1118
1119	ev_loop (0);
1120
1121	return 0;
1122	}
1123
1124	#endif
1125
1126
1127
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