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Comparing libev/ev.c (file contents):
Revision 1.32 by root, Thu Nov 1 09:21:51 2007 UTC vs.
Revision 1.103 by root, Mon Nov 12 00:31:08 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
57	#endif	100	#endif
58		101
		102	#ifndef EV_USE_POLL
		103	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		104	#endif
		105
59	#ifndef EV_USE_EPOLL	106	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	107	# define EV_USE_EPOLL 0
61	#endif	108	#endif
62		109
		110	#ifndef EV_USE_KQUEUE
		111	# define EV_USE_KQUEUE 0
		112	#endif
		113
		114	#ifndef EV_USE_REALTIME
		115	# define EV_USE_REALTIME 1
		116	#endif
		117
		118	/**/
		119
		120	#ifndef CLOCK_MONOTONIC
		121	# undef EV_USE_MONOTONIC
		122	# define EV_USE_MONOTONIC 0
		123	#endif
		124
63	#ifndef CLOCK_REALTIME	125	#ifndef CLOCK_REALTIME
		126	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	127	# define EV_USE_REALTIME 0
65	#endif	128	#endif
66	#ifndef EV_USE_REALTIME	129
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	130	#if EV_SELECT_IS_WINSOCKET
		131	# include <winsock.h>
68	#endif	132	#endif
		133
		134	/**/
69		135
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	136	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	137	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	138	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	139	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
74		140
		141	#ifdef EV_H
		142	# include EV_H
		143	#else
75	#include "ev.h"	144	# include "ev.h"
		145	#endif
		146
		147	#if __GNUC__ >= 3
		148	# define expect(expr,value) __builtin_expect ((expr),(value))
		149	# define inline inline
		150	#else
		151	# define expect(expr,value) (expr)
		152	# define inline static
		153	#endif
		154
		155	#define expect_false(expr) expect ((expr) != 0, 0)
		156	#define expect_true(expr) expect ((expr) != 0, 1)
		157
		158	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		159	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		160
		161	#define EMPTY /* required for microsofts broken pseudo-c compiler */
76		162
77	typedef struct ev_watcher *W;	163	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	164	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	165	typedef struct ev_watcher_time *WT;
80		166
81	static ev_tstamp now, diff; /* monotonic clock */	167	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		168
		169	#ifdef _WIN32
		170	# include "ev_win32.c"
		171	#endif
		172
		173	/*****************************************************************************/
		174
		175	static void (*syserr_cb)(const char *msg);
		176
		177	void ev_set_syserr_cb (void (*cb)(const char *msg))
		178	{
		179	syserr_cb = cb;
		180	}
		181
		182	static void
		183	syserr (const char *msg)
		184	{
		185	if (!msg)
		186	msg = "(libev) system error";
		187
		188	if (syserr_cb)
		189	syserr_cb (msg);
		190	else
		191	{
		192	perror (msg);
		193	abort ();
		194	}
		195	}
		196
		197	static void *(*alloc)(void *ptr, long size);
		198
		199	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		200	{
		201	alloc = cb;
		202	}
		203
		204	static void *
		205	ev_realloc (void *ptr, long size)
		206	{
		207	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		208
		209	if (!ptr && size)
		210	{
		211	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		212	abort ();
		213	}
		214
		215	return ptr;
		216	}
		217
		218	#define ev_malloc(size) ev_realloc (0, (size))
		219	#define ev_free(ptr) ev_realloc ((ptr), 0)
		220
		221	/*****************************************************************************/
		222
		223	typedef struct
		224	{
		225	WL head;
		226	unsigned char events;
		227	unsigned char reify;
		228	#if EV_SELECT_IS_WINSOCKET
		229	SOCKET handle;
		230	#endif
		231	} ANFD;
		232
		233	typedef struct
		234	{
		235	W w;
		236	int events;
		237	} ANPENDING;
		238
		239	#if EV_MULTIPLICITY
		240
		241	struct ev_loop
		242	{
		243	ev_tstamp ev_rt_now;
		244	#define ev_rt_now ((loop)->ev_rt_now)
		245	#define VAR(name,decl) decl;
		246	#include "ev_vars.h"
		247	#undef VAR
		248	};
		249	#include "ev_wrap.h"
		250
		251	struct ev_loop default_loop_struct;
		252	static struct ev_loop *default_loop;
		253
		254	#else
		255
82	ev_tstamp ev_now;	256	ev_tstamp ev_rt_now;
83	int ev_method;	257	#define VAR(name,decl) static decl;
		258	#include "ev_vars.h"
		259	#undef VAR
84		260
85	static int have_monotonic; /* runtime */	261	static int default_loop;
86		262
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	263	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		264
91	/*****************************************************************************/	265	/*****************************************************************************/
92		266
93	ev_tstamp	267	ev_tstamp
94	ev_time (void)	268	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	276	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	277	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	278	#endif
105	}	279	}
106		280
107	static ev_tstamp	281	inline ev_tstamp
108	get_clock (void)	282	get_clock (void)
109	{	283	{
110	#if EV_USE_MONOTONIC	284	#if EV_USE_MONOTONIC
111	if (have_monotonic)	285	if (expect_true (have_monotonic))
112	{	286	{
113	struct timespec ts;	287	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	288	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	289	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	290	}
117	#endif	291	#endif
118		292
119	return ev_time ();	293	return ev_time ();
120	}	294	}
121		295
		296	#if EV_MULTIPLICITY
		297	ev_tstamp
		298	ev_now (EV_P)
		299	{
		300	return ev_rt_now;
		301	}
		302	#endif
		303
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	304	#define array_roundsize(type,n) ((n) | 4 & ~3)
123		305
124	#define array_needsize(base,cur,cnt,init) \	306	#define array_needsize(type,base,cur,cnt,init) \
125	if ((cnt) > cur) \	307	if (expect_false ((cnt) > cur)) \
126	{ \	308	{ \
127	int newcnt = cur; \	309	int newcnt = cur; \
128	do \	310	do \
129	{ \	311	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	312	newcnt = array_roundsize (type, newcnt << 1); \
131	} \	313	} \
132	while ((cnt) > newcnt); \	314	while ((cnt) > newcnt); \
133	\	315	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \	316	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
135	init (base + cur, newcnt - cur); \	317	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	318	cur = newcnt; \
137	}	319	}
		320
		321	#define array_slim(type,stem) \
		322	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		323	{ \
		324	stem ## max = array_roundsize (stem ## cnt >> 1); \
		325	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		326	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		327	}
		328
		329	#define array_free(stem, idx) \
		330	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
138		331
139	/*****************************************************************************/	332	/*****************************************************************************/
140
141	typedef struct
142	{
143	struct ev_io *head;
144	int events;
145	} ANFD;
146
147	static ANFD *anfds;
148	static int anfdmax;
149		333
150	static void	334	static void
151	anfds_init (ANFD *base, int count)	335	anfds_init (ANFD *base, int count)
152	{	336	{
153	while (count--)	337	while (count--)
154	{	338	{
155	base->head = 0;	339	base->head = 0;
156	base->events = EV_NONE;	340	base->events = EV_NONE;
		341	base->reify = 0;
		342
157	++base;	343	++base;
158	}	344	}
159	}	345	}
160		346
161	typedef struct	347	void
		348	ev_feed_event (EV_P_ void *w, int revents)
162	{	349	{
163	W w;	350	W w_ = (W)w;
164	int events;
165	} ANPENDING;
166		351
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void
171	event (W w, int events)
172	{
173	if (w->pending)	352	if (w_->pending)
174	{	353	{
175	pendings [w->pending - 1].events |= events;	354	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
176	return;	355	return;
177	}	356	}
178		357
179	w->pending = ++pendingcnt;	358	w_->pending = ++pendingcnt [ABSPRI (w_)];
180	array_needsize (pendings, pendingmax, pendingcnt, );	359	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
181	pendings [pendingcnt - 1].w = w;	360	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
182	pendings [pendingcnt - 1].events = events;	361	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
183	}	362	}
184		363
185	static void	364	static void
186	queue_events (W *events, int eventcnt, int type)	365	queue_events (EV_P_ W *events, int eventcnt, int type)
187	{	366	{
188	int i;	367	int i;
189		368
190	for (i = 0; i < eventcnt; ++i)	369	for (i = 0; i < eventcnt; ++i)
191	event (events [i], type);	370	ev_feed_event (EV_A_ events [i], type);
192	}	371	}
193		372
194	static void	373	inline void
195	fd_event (int fd, int events)	374	fd_event (EV_P_ int fd, int revents)
196	{	375	{
197	ANFD *anfd = anfds + fd;	376	ANFD *anfd = anfds + fd;
198	struct ev_io *w;	377	struct ev_io *w;
199		378
200	for (w = anfd->head; w; w = w->next)	379	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
201	{	380	{
202	int ev = w->events & events;	381	int ev = w->events & revents;
203		382
204	if (ev)	383	if (ev)
205	event ((W)w, ev);	384	ev_feed_event (EV_A_ (W)w, ev);
206	}	385	}
		386	}
		387
		388	void
		389	ev_feed_fd_event (EV_P_ int fd, int revents)
		390	{
		391	fd_event (EV_A_ fd, revents);
207	}	392	}
208		393
209	/*****************************************************************************/	394	/*****************************************************************************/
210		395
211	static int *fdchanges;
212	static int fdchangemax, fdchangecnt;
213
214	static void	396	static void
215	fd_reify (void)	397	fd_reify (EV_P)
216	{	398	{
217	int i;	399	int i;
218		400
219	for (i = 0; i < fdchangecnt; ++i)	401	for (i = 0; i < fdchangecnt; ++i)
220	{	402	{
…		…
222	ANFD *anfd = anfds + fd;	404	ANFD *anfd = anfds + fd;
223	struct ev_io *w;	405	struct ev_io *w;
224		406
225	int events = 0;	407	int events = 0;
226		408
227	for (w = anfd->head; w; w = w->next)	409	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
228	events |= w->events;	410	events |= w->events;
229		411
230	anfd->events &= ~EV_REIFY;	412	#if EV_SELECT_IS_WINSOCKET
231		413	if (events)
232	if (anfd->events != events)
233	{	414	{
234	method_modify (fd, anfd->events, events);	415	unsigned long argp;
235	anfd->events = events;	416	anfd->handle = _get_osfhandle (fd);
		417	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
236	}	418	}
		419	#endif
		420
		421	anfd->reify = 0;
		422
		423	method_modify (EV_A_ fd, anfd->events, events);
		424	anfd->events = events;
237	}	425	}
238		426
239	fdchangecnt = 0;	427	fdchangecnt = 0;
240	}	428	}
241		429
242	static void	430	static void
243	fd_change (int fd)	431	fd_change (EV_P_ int fd)
244	{	432	{
245	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	433	if (anfds [fd].reify)
246	return;	434	return;
247		435
248	anfds [fd].events |= EV_REIFY;	436	anfds [fd].reify = 1;
249		437
250	++fdchangecnt;	438	++fdchangecnt;
251	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	439	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
252	fdchanges [fdchangecnt - 1] = fd;	440	fdchanges [fdchangecnt - 1] = fd;
253	}	441	}
254		442
		443	static void
		444	fd_kill (EV_P_ int fd)
		445	{
		446	struct ev_io *w;
		447
		448	while ((w = (struct ev_io *)anfds [fd].head))
		449	{
		450	ev_io_stop (EV_A_ w);
		451	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		452	}
		453	}
		454
		455	static int
		456	fd_valid (int fd)
		457	{
		458	#ifdef _WIN32
		459	return _get_osfhandle (fd) != -1;
		460	#else
		461	return fcntl (fd, F_GETFD) != -1;
		462	#endif
		463	}
		464
255	/* called on EBADF to verify fds */	465	/* called on EBADF to verify fds */
256	static void	466	static void
257	fd_recheck (void)	467	fd_ebadf (EV_P)
258	{	468	{
259	int fd;	469	int fd;
260		470
261	for (fd = 0; fd < anfdmax; ++fd)	471	for (fd = 0; fd < anfdmax; ++fd)
262	if (anfds [fd].events)	472	if (anfds [fd].events)
263	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	473	if (!fd_valid (fd) == -1 && errno == EBADF)
264	while (anfds [fd].head)	474	fd_kill (EV_A_ fd);
		475	}
		476
		477	/* called on ENOMEM in select/poll to kill some fds and retry */
		478	static void
		479	fd_enomem (EV_P)
		480	{
		481	int fd;
		482
		483	for (fd = anfdmax; fd--; )
		484	if (anfds [fd].events)
265	{	485	{
266	ev_io_stop (anfds [fd].head);	486	fd_kill (EV_A_ fd);
267	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	487	return;
268	}	488	}
		489	}
		490
		491	/* usually called after fork if method needs to re-arm all fds from scratch */
		492	static void
		493	fd_rearm_all (EV_P)
		494	{
		495	int fd;
		496
		497	/* this should be highly optimised to not do anything but set a flag */
		498	for (fd = 0; fd < anfdmax; ++fd)
		499	if (anfds [fd].events)
		500	{
		501	anfds [fd].events = 0;
		502	fd_change (EV_A_ fd);
		503	}
269	}	504	}
270		505
271	/*****************************************************************************/	506	/*****************************************************************************/
272		507
273	static struct ev_timer **timers;
274	static int timermax, timercnt;
275
276	static struct ev_periodic **periodics;
277	static int periodicmax, periodiccnt;
278
279	static void	508	static void
280	upheap (WT *timers, int k)	509	upheap (WT *heap, int k)
281	{	510	{
282	WT w = timers [k];	511	WT w = heap [k];
283		512
284	while (k && timers [k >> 1]->at > w->at)	513	while (k && heap [k >> 1]->at > w->at)
285	{	514	{
286	timers [k] = timers [k >> 1];	515	heap [k] = heap [k >> 1];
287	timers [k]->active = k + 1;	516	((W)heap [k])->active = k + 1;
288	k >>= 1;	517	k >>= 1;
289	}	518	}
290		519
291	timers [k] = w;	520	heap [k] = w;
292	timers [k]->active = k + 1;	521	((W)heap [k])->active = k + 1;
293		522
294	}	523	}
295		524
296	static void	525	static void
297	downheap (WT *timers, int N, int k)	526	downheap (WT *heap, int N, int k)
298	{	527	{
299	WT w = timers [k];	528	WT w = heap [k];
300		529
301	while (k < (N >> 1))	530	while (k < (N >> 1))
302	{	531	{
303	int j = k << 1;	532	int j = k << 1;
304		533
305	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	534	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
306	++j;	535	++j;
307		536
308	if (w->at <= timers [j]->at)	537	if (w->at <= heap [j]->at)
309	break;	538	break;
310		539
311	timers [k] = timers [j];	540	heap [k] = heap [j];
312	timers [k]->active = k + 1;	541	((W)heap [k])->active = k + 1;
313	k = j;	542	k = j;
314	}	543	}
315		544
316	timers [k] = w;	545	heap [k] = w;
317	timers [k]->active = k + 1;	546	((W)heap [k])->active = k + 1;
		547	}
		548
		549	inline void
		550	adjustheap (WT *heap, int N, int k)
		551	{
		552	upheap (heap, k);
		553	downheap (heap, N, k);
318	}	554	}
319		555
320	/*****************************************************************************/	556	/*****************************************************************************/
321		557
322	typedef struct	558	typedef struct
323	{	559	{
324	struct ev_signal *head;	560	WL head;
325	sig_atomic_t gotsig;	561	sig_atomic_t volatile gotsig;
326	} ANSIG;	562	} ANSIG;
327		563
328	static ANSIG *signals;	564	static ANSIG *signals;
329	static int signalmax;	565	static int signalmax;
330		566
331	static int sigpipe [2];	567	static int sigpipe [2];
332	static sig_atomic_t gotsig;	568	static sig_atomic_t volatile gotsig;
333	static struct ev_io sigev;	569	static struct ev_io sigev;
334		570
335	static void	571	static void
336	signals_init (ANSIG *base, int count)	572	signals_init (ANSIG *base, int count)
337	{	573	{
338	while (count--)	574	while (count--)
339	{	575	{
340	base->head = 0;	576	base->head = 0;
341	base->gotsig = 0;	577	base->gotsig = 0;
		578
342	++base;	579	++base;
343	}	580	}
344	}	581	}
345		582
346	static void	583	static void
347	sighandler (int signum)	584	sighandler (int signum)
348	{	585	{
		586	#if _WIN32
		587	signal (signum, sighandler);
		588	#endif
		589
349	signals [signum - 1].gotsig = 1;	590	signals [signum - 1].gotsig = 1;
350		591
351	if (!gotsig)	592	if (!gotsig)
352	{	593	{
		594	int old_errno = errno;
353	gotsig = 1;	595	gotsig = 1;
354	write (sigpipe [1], &gotsig, 1);	596	write (sigpipe [1], &signum, 1);
		597	errno = old_errno;
355	}	598	}
356	}	599	}
357		600
		601	void
		602	ev_feed_signal_event (EV_P_ int signum)
		603	{
		604	WL w;
		605
		606	#if EV_MULTIPLICITY
		607	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		608	#endif
		609
		610	--signum;
		611
		612	if (signum < 0 || signum >= signalmax)
		613	return;
		614
		615	signals [signum].gotsig = 0;
		616
		617	for (w = signals [signum].head; w; w = w->next)
		618	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		619	}
		620
358	static void	621	static void
359	sigcb (struct ev_io *iow, int revents)	622	sigcb (EV_P_ struct ev_io *iow, int revents)
360	{	623	{
361	struct ev_signal *w;
362	int sig;	624	int signum;
363		625
		626	read (sigpipe [0], &revents, 1);
364	gotsig = 0;	627	gotsig = 0;
365	read (sigpipe [0], &revents, 1);
366		628
367	for (sig = signalmax; sig--; )	629	for (signum = signalmax; signum--; )
368	if (signals [sig].gotsig)	630	if (signals [signum].gotsig)
369	{	631	ev_feed_signal_event (EV_A_ signum + 1);
370	signals [sig].gotsig = 0;
371
372	for (w = signals [sig].head; w; w = w->next)
373	event ((W)w, EV_SIGNAL);
374	}
375	}	632	}
376		633
377	static void	634	inline void
378	siginit (void)	635	fd_intern (int fd)
379	{	636	{
		637	#ifdef _WIN32
		638	int arg = 1;
		639	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		640	#else
380	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	641	fcntl (fd, F_SETFD, FD_CLOEXEC);
381	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
382
383	/* rather than sort out wether we really need nb, set it */
384	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	642	fcntl (fd, F_SETFL, O_NONBLOCK);
385	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	643	#endif
		644	}
		645
		646	static void
		647	siginit (EV_P)
		648	{
		649	fd_intern (sigpipe [0]);
		650	fd_intern (sigpipe [1]);
386		651
387	ev_io_set (&sigev, sigpipe [0], EV_READ);	652	ev_io_set (&sigev, sigpipe [0], EV_READ);
388	ev_io_start (&sigev);	653	ev_io_start (EV_A_ &sigev);
		654	ev_unref (EV_A); /* child watcher should not keep loop alive */
389	}	655	}
390		656
391	/*****************************************************************************/	657	/*****************************************************************************/
392		658
393	static struct ev_idle **idles;
394	static int idlemax, idlecnt;
395
396	static struct ev_prepare **prepares;
397	static int preparemax, preparecnt;
398
399	static struct ev_check **checks;
400	static int checkmax, checkcnt;
401
402	/*****************************************************************************/
403
404	static struct ev_child *childs [PID_HASHSIZE];	659	static struct ev_child *childs [PID_HASHSIZE];
		660
		661	#ifndef _WIN32
		662
405	static struct ev_signal childev;	663	static struct ev_signal childev;
406		664
407	#ifndef WCONTINUED	665	#ifndef WCONTINUED
408	# define WCONTINUED 0	666	# define WCONTINUED 0
409	#endif	667	#endif
410		668
411	static void	669	static void
412	childcb (struct ev_signal *sw, int revents)	670	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
413	{	671	{
414	struct ev_child *w;	672	struct ev_child *w;
		673
		674	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		675	if (w->pid == pid || !w->pid)
		676	{
		677	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		678	w->rpid = pid;
		679	w->rstatus = status;
		680	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		681	}
		682	}
		683
		684	static void
		685	childcb (EV_P_ struct ev_signal *sw, int revents)
		686	{
415	int pid, status;	687	int pid, status;
416		688
417	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	689	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
418	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	690	{
419	if (w->pid == pid || w->pid == -1)	691	/* make sure we are called again until all childs have been reaped */
420	{	692	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
421	w->status = status;	693
422	event ((W)w, EV_CHILD);	694	child_reap (EV_A_ sw, pid, pid, status);
423	}	695	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		696	}
424	}	697	}
		698
		699	#endif
425		700
426	/*****************************************************************************/	701	/*****************************************************************************/
427		702
		703	#if EV_USE_KQUEUE
		704	# include "ev_kqueue.c"
		705	#endif
428	#if EV_USE_EPOLL	706	#if EV_USE_EPOLL
429	# include "ev_epoll.c"	707	# include "ev_epoll.c"
430	#endif	708	#endif
		709	#if EV_USE_POLL
		710	# include "ev_poll.c"
		711	#endif
431	#if EV_USE_SELECT	712	#if EV_USE_SELECT
432	# include "ev_select.c"	713	# include "ev_select.c"
433	#endif	714	#endif
434		715
435	int	716	int
…		…
442	ev_version_minor (void)	723	ev_version_minor (void)
443	{	724	{
444	return EV_VERSION_MINOR;	725	return EV_VERSION_MINOR;
445	}	726	}
446		727
447	int ev_init (int flags)	728	/* return true if we are running with elevated privileges and should ignore env variables */
		729	static int
		730	enable_secure (void)
448	{	731	{
		732	#ifdef _WIN32
		733	return 0;
		734	#else
		735	return getuid () != geteuid ()
		736	|| getgid () != getegid ();
		737	#endif
		738	}
		739
		740	int
		741	ev_method (EV_P)
		742	{
		743	return method;
		744	}
		745
		746	static void
		747	loop_init (EV_P_ int methods)
		748	{
449	if (!ev_method)	749	if (!method)
450	{	750	{
451	#if EV_USE_MONOTONIC	751	#if EV_USE_MONOTONIC
452	{	752	{
453	struct timespec ts;	753	struct timespec ts;
454	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	754	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
455	have_monotonic = 1;	755	have_monotonic = 1;
456	}	756	}
457	#endif	757	#endif
458		758
459	ev_now = ev_time ();	759	ev_rt_now = ev_time ();
460	now = get_clock ();	760	mn_now = get_clock ();
		761	now_floor = mn_now;
461	diff = ev_now - now;	762	rtmn_diff = ev_rt_now - mn_now;
462		763
463	if (pipe (sigpipe))	764	if (methods == EVMETHOD_AUTO)
464	return 0;	765	if (!enable_secure () && getenv ("LIBEV_METHODS"))
465		766	methods = atoi (getenv ("LIBEV_METHODS"));
		767	else
466	ev_method = EVMETHOD_NONE;	768	methods = EVMETHOD_ANY;
		769
		770	method = 0;
		771	#if EV_USE_KQUEUE
		772	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		773	#endif
467	#if EV_USE_EPOLL	774	#if EV_USE_EPOLL
468	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	775	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		776	#endif
		777	#if EV_USE_POLL
		778	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
469	#endif	779	#endif
470	#if EV_USE_SELECT	780	#if EV_USE_SELECT
471	if (ev_method == EVMETHOD_NONE) select_init (flags);	781	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
472	#endif	782	#endif
473		783
		784	ev_init (&sigev, sigcb);
		785	ev_set_priority (&sigev, EV_MAXPRI);
		786	}
		787	}
		788
		789	void
		790	loop_destroy (EV_P)
		791	{
		792	int i;
		793
		794	#if EV_USE_KQUEUE
		795	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		796	#endif
		797	#if EV_USE_EPOLL
		798	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		799	#endif
		800	#if EV_USE_POLL
		801	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		802	#endif
		803	#if EV_USE_SELECT
		804	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		805	#endif
		806
		807	for (i = NUMPRI; i--; )
		808	array_free (pending, [i]);
		809
		810	/* have to use the microsoft-never-gets-it-right macro */
		811	array_free (fdchange, EMPTY);
		812	array_free (timer, EMPTY);
		813	#if EV_PERIODICS
		814	array_free (periodic, EMPTY);
		815	#endif
		816	array_free (idle, EMPTY);
		817	array_free (prepare, EMPTY);
		818	array_free (check, EMPTY);
		819
		820	method = 0;
		821	}
		822
		823	static void
		824	loop_fork (EV_P)
		825	{
		826	#if EV_USE_EPOLL
		827	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		828	#endif
		829	#if EV_USE_KQUEUE
		830	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		831	#endif
		832
		833	if (ev_is_active (&sigev))
		834	{
		835	/* default loop */
		836
		837	ev_ref (EV_A);
		838	ev_io_stop (EV_A_ &sigev);
		839	close (sigpipe [0]);
		840	close (sigpipe [1]);
		841
		842	while (pipe (sigpipe))
		843	syserr ("(libev) error creating pipe");
		844
		845	siginit (EV_A);
		846	}
		847
		848	postfork = 0;
		849	}
		850
		851	#if EV_MULTIPLICITY
		852	struct ev_loop *
		853	ev_loop_new (int methods)
		854	{
		855	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		856
		857	memset (loop, 0, sizeof (struct ev_loop));
		858
		859	loop_init (EV_A_ methods);
		860
		861	if (ev_method (EV_A))
		862	return loop;
		863
		864	return 0;
		865	}
		866
		867	void
		868	ev_loop_destroy (EV_P)
		869	{
		870	loop_destroy (EV_A);
		871	ev_free (loop);
		872	}
		873
		874	void
		875	ev_loop_fork (EV_P)
		876	{
		877	postfork = 1;
		878	}
		879
		880	#endif
		881
		882	#if EV_MULTIPLICITY
		883	struct ev_loop *
		884	#else
		885	int
		886	#endif
		887	ev_default_loop (int methods)
		888	{
		889	if (sigpipe [0] == sigpipe [1])
		890	if (pipe (sigpipe))
		891	return 0;
		892
		893	if (!default_loop)
		894	{
		895	#if EV_MULTIPLICITY
		896	struct ev_loop *loop = default_loop = &default_loop_struct;
		897	#else
		898	default_loop = 1;
		899	#endif
		900
		901	loop_init (EV_A_ methods);
		902
474	if (ev_method)	903	if (ev_method (EV_A))
475	{	904	{
476	ev_watcher_init (&sigev, sigcb);
477	siginit ();	905	siginit (EV_A);
478		906
		907	#ifndef _WIN32
479	ev_signal_init (&childev, childcb, SIGCHLD);	908	ev_signal_init (&childev, childcb, SIGCHLD);
		909	ev_set_priority (&childev, EV_MAXPRI);
480	ev_signal_start (&childev);	910	ev_signal_start (EV_A_ &childev);
		911	ev_unref (EV_A); /* child watcher should not keep loop alive */
		912	#endif
481	}	913	}
		914	else
		915	default_loop = 0;
482	}	916	}
483		917
484	return ev_method;	918	return default_loop;
		919	}
		920
		921	void
		922	ev_default_destroy (void)
		923	{
		924	#if EV_MULTIPLICITY
		925	struct ev_loop *loop = default_loop;
		926	#endif
		927
		928	#ifndef _WIN32
		929	ev_ref (EV_A); /* child watcher */
		930	ev_signal_stop (EV_A_ &childev);
		931	#endif
		932
		933	ev_ref (EV_A); /* signal watcher */
		934	ev_io_stop (EV_A_ &sigev);
		935
		936	close (sigpipe [0]); sigpipe [0] = 0;
		937	close (sigpipe [1]); sigpipe [1] = 0;
		938
		939	loop_destroy (EV_A);
		940	}
		941
		942	void
		943	ev_default_fork (void)
		944	{
		945	#if EV_MULTIPLICITY
		946	struct ev_loop *loop = default_loop;
		947	#endif
		948
		949	if (method)
		950	postfork = 1;
485	}	951	}
486		952
487	/*****************************************************************************/	953	/*****************************************************************************/
488		954
489	void
490	ev_prefork (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_parent (void)
497	{
498	/* nop */
499	}
500
501	void
502	ev_postfork_child (void)
503	{
504	#if EV_USE_EPOLL
505	if (ev_method == EVMETHOD_EPOLL)
506	epoll_postfork_child ();
507	#endif
508
509	ev_io_stop (&sigev);
510	close (sigpipe [0]);
511	close (sigpipe [1]);
512	pipe (sigpipe);
513	siginit ();
514	}
515
516	/*****************************************************************************/
517
518	static void	955	static int
		956	any_pending (EV_P)
		957	{
		958	int pri;
		959
		960	for (pri = NUMPRI; pri--; )
		961	if (pendingcnt [pri])
		962	return 1;
		963
		964	return 0;
		965	}
		966
		967	static void
519	call_pending (void)	968	call_pending (EV_P)
520	{	969	{
		970	int pri;
		971
		972	for (pri = NUMPRI; pri--; )
521	while (pendingcnt)	973	while (pendingcnt [pri])
522	{	974	{
523	ANPENDING *p = pendings + --pendingcnt;	975	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
524		976
525	if (p->w)	977	if (p->w)
526	{	978	{
527	p->w->pending = 0;	979	p->w->pending = 0;
528	p->w->cb (p->w, p->events);	980	EV_CB_INVOKE (p->w, p->events);
529	}	981	}
530	}	982	}
531	}	983	}
532		984
533	static void	985	static void
534	timers_reify (void)	986	timers_reify (EV_P)
535	{	987	{
536	while (timercnt && timers [0]->at <= now)	988	while (timercnt && ((WT)timers [0])->at <= mn_now)
537	{	989	{
538	struct ev_timer *w = timers [0];	990	struct ev_timer *w = timers [0];
		991
		992	assert (("inactive timer on timer heap detected", ev_is_active (w)));
539		993
540	/* first reschedule or stop timer */	994	/* first reschedule or stop timer */
541	if (w->repeat)	995	if (w->repeat)
542	{	996	{
		997	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		998
543	w->at = now + w->repeat;	999	((WT)w)->at += w->repeat;
544	assert (("timer timeout in the past, negative repeat?", w->at > now));	1000	if (((WT)w)->at < mn_now)
		1001	((WT)w)->at = mn_now;
		1002
545	downheap ((WT *)timers, timercnt, 0);	1003	downheap ((WT *)timers, timercnt, 0);
546	}	1004	}
547	else	1005	else
548	ev_timer_stop (w); /* nonrepeating: stop timer */	1006	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
549		1007
550	event ((W)w, EV_TIMEOUT);	1008	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
551	}	1009	}
552	}	1010	}
553		1011
		1012	#if EV_PERIODICS
554	static void	1013	static void
555	periodics_reify (void)	1014	periodics_reify (EV_P)
556	{	1015	{
557	while (periodiccnt && periodics [0]->at <= ev_now)	1016	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
558	{	1017	{
559	struct ev_periodic *w = periodics [0];	1018	struct ev_periodic *w = periodics [0];
560		1019
		1020	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1021
561	/* first reschedule or stop timer */	1022	/* first reschedule or stop timer */
562	if (w->interval)	1023	if (w->reschedule_cb)
563	{	1024	{
		1025	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1026
		1027	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1028	downheap ((WT *)periodics, periodiccnt, 0);
		1029	}
		1030	else if (w->interval)
		1031	{
564	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1032	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
565	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1033	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
566	downheap ((WT *)periodics, periodiccnt, 0);	1034	downheap ((WT *)periodics, periodiccnt, 0);
567	}	1035	}
568	else	1036	else
569	ev_periodic_stop (w); /* nonrepeating: stop timer */	1037	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
570		1038
571	event ((W)w, EV_TIMEOUT);	1039	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
572	}	1040	}
573	}	1041	}
574		1042
575	static void	1043	static void
576	periodics_reschedule (ev_tstamp diff)	1044	periodics_reschedule (EV_P)
577	{	1045	{
578	int i;	1046	int i;
579		1047
580	/* adjust periodics after time jump */	1048	/* adjust periodics after time jump */
581	for (i = 0; i < periodiccnt; ++i)	1049	for (i = 0; i < periodiccnt; ++i)
582	{	1050	{
583	struct ev_periodic *w = periodics [i];	1051	struct ev_periodic *w = periodics [i];
584		1052
		1053	if (w->reschedule_cb)
		1054	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
585	if (w->interval)	1055	else if (w->interval)
		1056	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1057	}
		1058
		1059	/* now rebuild the heap */
		1060	for (i = periodiccnt >> 1; i--; )
		1061	downheap ((WT *)periodics, periodiccnt, i);
		1062	}
		1063	#endif
		1064
		1065	inline int
		1066	time_update_monotonic (EV_P)
		1067	{
		1068	mn_now = get_clock ();
		1069
		1070	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1071	{
		1072	ev_rt_now = rtmn_diff + mn_now;
		1073	return 0;
		1074	}
		1075	else
		1076	{
		1077	now_floor = mn_now;
		1078	ev_rt_now = ev_time ();
		1079	return 1;
		1080	}
		1081	}
		1082
		1083	static void
		1084	time_update (EV_P)
		1085	{
		1086	int i;
		1087
		1088	#if EV_USE_MONOTONIC
		1089	if (expect_true (have_monotonic))
		1090	{
		1091	if (time_update_monotonic (EV_A))
586	{	1092	{
587	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1093	ev_tstamp odiff = rtmn_diff;
588		1094
589	if (fabs (diff) >= 1e-4)	1095	for (i = 4; --i; ) /* loop a few times, before making important decisions */
590	{	1096	{
591	ev_periodic_stop (w);	1097	rtmn_diff = ev_rt_now - mn_now;
592	ev_periodic_start (w);
593		1098
594	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1099	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1100	return; /* all is well */
		1101
		1102	ev_rt_now = ev_time ();
		1103	mn_now = get_clock ();
		1104	now_floor = mn_now;
595	}	1105	}
		1106
		1107	# if EV_PERIODICS
		1108	periodics_reschedule (EV_A);
		1109	# endif
		1110	/* no timer adjustment, as the monotonic clock doesn't jump */
		1111	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
596	}	1112	}
597	}	1113	}
598	}	1114	else
599		1115	#endif
600	static void	1116	{
601	time_update (void)
602	{
603	int i;
604
605	ev_now = ev_time ();	1117	ev_rt_now = ev_time ();
606		1118
607	if (have_monotonic)	1119	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
608	{
609	ev_tstamp odiff = diff;
610
611	for (i = 4; --i; ) /* loop a few times, before making important decisions */
612	{	1120	{
613	now = get_clock ();	1121	#if EV_PERIODICS
614	diff = ev_now - now;
615
616	if (fabs (odiff - diff) < MIN_TIMEJUMP)
617	return; /* all is well */
618
619	ev_now = ev_time ();
620	}
621
622	periodics_reschedule (diff - odiff);
623	/* no timer adjustment, as the monotonic clock doesn't jump */
624	}
625	else
626	{
627	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
628	{
629	periodics_reschedule (ev_now - now);	1122	periodics_reschedule (EV_A);
		1123	#endif
630		1124
631	/* adjust timers. this is easy, as the offset is the same for all */	1125	/* adjust timers. this is easy, as the offset is the same for all */
632	for (i = 0; i < timercnt; ++i)	1126	for (i = 0; i < timercnt; ++i)
633	timers [i]->at += diff;	1127	((WT)timers [i])->at += ev_rt_now - mn_now;
634	}	1128	}
635		1129
636	now = ev_now;	1130	mn_now = ev_rt_now;
637	}	1131	}
638	}	1132	}
639		1133
640	int ev_loop_done;	1134	void
		1135	ev_ref (EV_P)
		1136	{
		1137	++activecnt;
		1138	}
641		1139
		1140	void
		1141	ev_unref (EV_P)
		1142	{
		1143	--activecnt;
		1144	}
		1145
		1146	static int loop_done;
		1147
		1148	void
642	void ev_loop (int flags)	1149	ev_loop (EV_P_ int flags)
643	{	1150	{
644	double block;	1151	double block;
645	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1152	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
646		1153
647	do	1154	do
648	{	1155	{
649	/* queue check watchers (and execute them) */	1156	/* queue check watchers (and execute them) */
650	if (preparecnt)	1157	if (expect_false (preparecnt))
651	{	1158	{
652	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1159	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
653	call_pending ();	1160	call_pending (EV_A);
654	}	1161	}
655		1162
		1163	/* we might have forked, so reify kernel state if necessary */
		1164	if (expect_false (postfork))
		1165	loop_fork (EV_A);
		1166
656	/* update fd-related kernel structures */	1167	/* update fd-related kernel structures */
657	fd_reify ();	1168	fd_reify (EV_A);
658		1169
659	/* calculate blocking time */	1170	/* calculate blocking time */
660		1171
661	/* we only need this for !monotonic clockor timers, but as we basically	1172	/* we only need this for !monotonic clock or timers, but as we basically
662	always have timers, we just calculate it always */	1173	always have timers, we just calculate it always */
		1174	#if EV_USE_MONOTONIC
		1175	if (expect_true (have_monotonic))
		1176	time_update_monotonic (EV_A);
		1177	else
		1178	#endif
		1179	{
663	ev_now = ev_time ();	1180	ev_rt_now = ev_time ();
		1181	mn_now = ev_rt_now;
		1182	}
664		1183
665	if (flags & EVLOOP_NONBLOCK || idlecnt)	1184	if (flags & EVLOOP_NONBLOCK || idlecnt)
666	block = 0.;	1185	block = 0.;
667	else	1186	else
668	{	1187	{
669	block = MAX_BLOCKTIME;	1188	block = MAX_BLOCKTIME;
670		1189
671	if (timercnt)	1190	if (timercnt)
672	{	1191	{
673	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1192	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
674	if (block > to) block = to;	1193	if (block > to) block = to;
675	}	1194	}
676		1195
		1196	#if EV_PERIODICS
677	if (periodiccnt)	1197	if (periodiccnt)
678	{	1198	{
679	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1199	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
680	if (block > to) block = to;	1200	if (block > to) block = to;
681	}	1201	}
		1202	#endif
682		1203
683	if (block < 0.) block = 0.;	1204	if (block < 0.) block = 0.;
684	}	1205	}
685		1206
686	method_poll (block);	1207	method_poll (EV_A_ block);
687		1208
688	/* update ev_now, do magic */	1209	/* update ev_rt_now, do magic */
689	time_update ();	1210	time_update (EV_A);
690		1211
691	/* queue pending timers and reschedule them */	1212	/* queue pending timers and reschedule them */
692	timers_reify (); /* relative timers called last */	1213	timers_reify (EV_A); /* relative timers called last */
		1214	#if EV_PERIODICS
693	periodics_reify (); /* absolute timers called first */	1215	periodics_reify (EV_A); /* absolute timers called first */
		1216	#endif
694		1217
695	/* queue idle watchers unless io or timers are pending */	1218	/* queue idle watchers unless io or timers are pending */
696	if (!pendingcnt)	1219	if (idlecnt && !any_pending (EV_A))
697	queue_events ((W *)idles, idlecnt, EV_IDLE);	1220	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
698		1221
699	/* queue check watchers, to be executed first */	1222	/* queue check watchers, to be executed first */
700	if (checkcnt)	1223	if (checkcnt)
701	queue_events ((W *)checks, checkcnt, EV_CHECK);	1224	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
702		1225
703	call_pending ();	1226	call_pending (EV_A);
704	}	1227	}
705	while (!ev_loop_done);	1228	while (activecnt && !loop_done);
706		1229
707	if (ev_loop_done != 2)	1230	if (loop_done != 2)
708	ev_loop_done = 0;	1231	loop_done = 0;
		1232	}
		1233
		1234	void
		1235	ev_unloop (EV_P_ int how)
		1236	{
		1237	loop_done = how;
709	}	1238	}
710		1239
711	/*****************************************************************************/	1240	/*****************************************************************************/
712		1241
713	static void	1242	inline void
714	wlist_add (WL *head, WL elem)	1243	wlist_add (WL *head, WL elem)
715	{	1244	{
716	elem->next = *head;	1245	elem->next = *head;
717	*head = elem;	1246	*head = elem;
718	}	1247	}
719		1248
720	static void	1249	inline void
721	wlist_del (WL *head, WL elem)	1250	wlist_del (WL *head, WL elem)
722	{	1251	{
723	while (*head)	1252	while (*head)
724	{	1253	{
725	if (*head == elem)	1254	if (*head == elem)
…		…
730		1259
731	head = &(*head)->next;	1260	head = &(*head)->next;
732	}	1261	}
733	}	1262	}
734		1263
735	static void	1264	inline void
736	ev_clear (W w)	1265	ev_clear_pending (EV_P_ W w)
737	{	1266	{
738	if (w->pending)	1267	if (w->pending)
739	{	1268	{
740	pendings [w->pending - 1].w = 0;	1269	pendings [ABSPRI (w)][w->pending - 1].w = 0;
741	w->pending = 0;	1270	w->pending = 0;
742	}	1271	}
743	}	1272	}
744		1273
745	static void	1274	inline void
746	ev_start (W w, int active)	1275	ev_start (EV_P_ W w, int active)
747	{	1276	{
		1277	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1278	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1279
748	w->active = active;	1280	w->active = active;
		1281	ev_ref (EV_A);
749	}	1282	}
750		1283
751	static void	1284	inline void
752	ev_stop (W w)	1285	ev_stop (EV_P_ W w)
753	{	1286	{
		1287	ev_unref (EV_A);
754	w->active = 0;	1288	w->active = 0;
755	}	1289	}
756		1290
757	/*****************************************************************************/	1291	/*****************************************************************************/
758		1292
759	void	1293	void
760	ev_io_start (struct ev_io *w)	1294	ev_io_start (EV_P_ struct ev_io *w)
761	{	1295	{
		1296	int fd = w->fd;
		1297
762	if (ev_is_active (w))	1298	if (ev_is_active (w))
763	return;	1299	return;
764		1300
765	int fd = w->fd;	1301	assert (("ev_io_start called with negative fd", fd >= 0));
766		1302
767	ev_start ((W)w, 1);	1303	ev_start (EV_A_ (W)w, 1);
768	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1304	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
769	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1305	wlist_add ((WL *)&anfds[fd].head, (WL)w);
770		1306
771	fd_change (fd);	1307	fd_change (EV_A_ fd);
772	}	1308	}
773		1309
774	void	1310	void
775	ev_io_stop (struct ev_io *w)	1311	ev_io_stop (EV_P_ struct ev_io *w)
776	{	1312	{
777	ev_clear ((W)w);	1313	ev_clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1314	if (!ev_is_active (w))
779	return;	1315	return;
780		1316
		1317	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1318
781	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1319	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
782	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
783		1321
784	fd_change (w->fd);	1322	fd_change (EV_A_ w->fd);
785	}	1323	}
786		1324
787	void	1325	void
788	ev_timer_start (struct ev_timer *w)	1326	ev_timer_start (EV_P_ struct ev_timer *w)
789	{	1327	{
790	if (ev_is_active (w))	1328	if (ev_is_active (w))
791	return;	1329	return;
792		1330
793	w->at += now;	1331	((WT)w)->at += mn_now;
794		1332
795	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1333	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
796		1334
797	ev_start ((W)w, ++timercnt);	1335	ev_start (EV_A_ (W)w, ++timercnt);
798	array_needsize (timers, timermax, timercnt, );	1336	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
799	timers [timercnt - 1] = w;	1337	timers [timercnt - 1] = w;
800	upheap ((WT *)timers, timercnt - 1);	1338	upheap ((WT *)timers, timercnt - 1);
801	}
802		1339
		1340	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1341	}
		1342
803	void	1343	void
804	ev_timer_stop (struct ev_timer *w)	1344	ev_timer_stop (EV_P_ struct ev_timer *w)
805	{	1345	{
806	ev_clear ((W)w);	1346	ev_clear_pending (EV_A_ (W)w);
807	if (!ev_is_active (w))	1347	if (!ev_is_active (w))
808	return;	1348	return;
809		1349
		1350	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1351
810	if (w->active < timercnt--)	1352	if (((W)w)->active < timercnt--)
811	{	1353	{
812	timers [w->active - 1] = timers [timercnt];	1354	timers [((W)w)->active - 1] = timers [timercnt];
813	downheap ((WT *)timers, timercnt, w->active - 1);	1355	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
814	}	1356	}
815		1357
816	w->at = w->repeat;	1358	((WT)w)->at -= mn_now;
817		1359
818	ev_stop ((W)w);	1360	ev_stop (EV_A_ (W)w);
819	}	1361	}
820		1362
821	void	1363	void
822	ev_timer_again (struct ev_timer *w)	1364	ev_timer_again (EV_P_ struct ev_timer *w)
823	{	1365	{
824	if (ev_is_active (w))	1366	if (ev_is_active (w))
825	{	1367	{
826	if (w->repeat)	1368	if (w->repeat)
827	{	1369	{
828	w->at = now + w->repeat;	1370	((WT)w)->at = mn_now + w->repeat;
829	downheap ((WT *)timers, timercnt, w->active - 1);	1371	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
830	}	1372	}
831	else	1373	else
832	ev_timer_stop (w);	1374	ev_timer_stop (EV_A_ w);
833	}	1375	}
834	else if (w->repeat)	1376	else if (w->repeat)
835	ev_timer_start (w);	1377	ev_timer_start (EV_A_ w);
836	}	1378	}
837		1379
		1380	#if EV_PERIODICS
838	void	1381	void
839	ev_periodic_start (struct ev_periodic *w)	1382	ev_periodic_start (EV_P_ struct ev_periodic *w)
840	{	1383	{
841	if (ev_is_active (w))	1384	if (ev_is_active (w))
842	return;	1385	return;
843		1386
844	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1387	if (w->reschedule_cb)
845		1388	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1389	else if (w->interval)
		1390	{
		1391	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
846	/* this formula differs from the one in periodic_reify because we do not always round up */	1392	/* this formula differs from the one in periodic_reify because we do not always round up */
847	if (w->interval)
848	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1393	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1394	}
849		1395
850	ev_start ((W)w, ++periodiccnt);	1396	ev_start (EV_A_ (W)w, ++periodiccnt);
851	array_needsize (periodics, periodicmax, periodiccnt, );	1397	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
852	periodics [periodiccnt - 1] = w;	1398	periodics [periodiccnt - 1] = w;
853	upheap ((WT *)periodics, periodiccnt - 1);	1399	upheap ((WT *)periodics, periodiccnt - 1);
854	}
855		1400
		1401	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1402	}
		1403
856	void	1404	void
857	ev_periodic_stop (struct ev_periodic *w)	1405	ev_periodic_stop (EV_P_ struct ev_periodic *w)
858	{	1406	{
859	ev_clear ((W)w);	1407	ev_clear_pending (EV_A_ (W)w);
860	if (!ev_is_active (w))	1408	if (!ev_is_active (w))
861	return;	1409	return;
862		1410
		1411	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1412
863	if (w->active < periodiccnt--)	1413	if (((W)w)->active < periodiccnt--)
864	{	1414	{
865	periodics [w->active - 1] = periodics [periodiccnt];	1415	periodics [((W)w)->active - 1] = periodics [periodiccnt];
866	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1416	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
867	}	1417	}
868		1418
869	ev_stop ((W)w);	1419	ev_stop (EV_A_ (W)w);
870	}	1420	}
871		1421
872	void	1422	void
		1423	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1424	{
		1425	/* TODO: use adjustheap and recalculation */
		1426	ev_periodic_stop (EV_A_ w);
		1427	ev_periodic_start (EV_A_ w);
		1428	}
		1429	#endif
		1430
		1431	void
873	ev_signal_start (struct ev_signal *w)	1432	ev_idle_start (EV_P_ struct ev_idle *w)
874	{	1433	{
875	if (ev_is_active (w))	1434	if (ev_is_active (w))
876	return;	1435	return;
877		1436
		1437	ev_start (EV_A_ (W)w, ++idlecnt);
		1438	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1439	idles [idlecnt - 1] = w;
		1440	}
		1441
		1442	void
		1443	ev_idle_stop (EV_P_ struct ev_idle *w)
		1444	{
		1445	ev_clear_pending (EV_A_ (W)w);
		1446	if (!ev_is_active (w))
		1447	return;
		1448
		1449	idles [((W)w)->active - 1] = idles [--idlecnt];
		1450	ev_stop (EV_A_ (W)w);
		1451	}
		1452
		1453	void
		1454	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1455	{
		1456	if (ev_is_active (w))
		1457	return;
		1458
		1459	ev_start (EV_A_ (W)w, ++preparecnt);
		1460	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1461	prepares [preparecnt - 1] = w;
		1462	}
		1463
		1464	void
		1465	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1466	{
		1467	ev_clear_pending (EV_A_ (W)w);
		1468	if (!ev_is_active (w))
		1469	return;
		1470
		1471	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1472	ev_stop (EV_A_ (W)w);
		1473	}
		1474
		1475	void
		1476	ev_check_start (EV_P_ struct ev_check *w)
		1477	{
		1478	if (ev_is_active (w))
		1479	return;
		1480
		1481	ev_start (EV_A_ (W)w, ++checkcnt);
		1482	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1483	checks [checkcnt - 1] = w;
		1484	}
		1485
		1486	void
		1487	ev_check_stop (EV_P_ struct ev_check *w)
		1488	{
		1489	ev_clear_pending (EV_A_ (W)w);
		1490	if (!ev_is_active (w))
		1491	return;
		1492
		1493	checks [((W)w)->active - 1] = checks [--checkcnt];
		1494	ev_stop (EV_A_ (W)w);
		1495	}
		1496
		1497	#ifndef SA_RESTART
		1498	# define SA_RESTART 0
		1499	#endif
		1500
		1501	void
		1502	ev_signal_start (EV_P_ struct ev_signal *w)
		1503	{
		1504	#if EV_MULTIPLICITY
		1505	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1506	#endif
		1507	if (ev_is_active (w))
		1508	return;
		1509
		1510	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1511
878	ev_start ((W)w, 1);	1512	ev_start (EV_A_ (W)w, 1);
879	array_needsize (signals, signalmax, w->signum, signals_init);	1513	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
880	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1514	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
881		1515
882	if (!w->next)	1516	if (!((WL)w)->next)
883	{	1517	{
		1518	#if _WIN32
		1519	signal (w->signum, sighandler);
		1520	#else
884	struct sigaction sa;	1521	struct sigaction sa;
885	sa.sa_handler = sighandler;	1522	sa.sa_handler = sighandler;
886	sigfillset (&sa.sa_mask);	1523	sigfillset (&sa.sa_mask);
887	sa.sa_flags = 0;	1524	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
888	sigaction (w->signum, &sa, 0);	1525	sigaction (w->signum, &sa, 0);
		1526	#endif
889	}	1527	}
890	}	1528	}
891		1529
892	void	1530	void
893	ev_signal_stop (struct ev_signal *w)	1531	ev_signal_stop (EV_P_ struct ev_signal *w)
894	{	1532	{
895	ev_clear ((W)w);	1533	ev_clear_pending (EV_A_ (W)w);
896	if (!ev_is_active (w))	1534	if (!ev_is_active (w))
897	return;	1535	return;
898		1536
899	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1537	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
900	ev_stop ((W)w);	1538	ev_stop (EV_A_ (W)w);
901		1539
902	if (!signals [w->signum - 1].head)	1540	if (!signals [w->signum - 1].head)
903	signal (w->signum, SIG_DFL);	1541	signal (w->signum, SIG_DFL);
904	}	1542	}
905		1543
906	void	1544	void
907	ev_idle_start (struct ev_idle *w)	1545	ev_child_start (EV_P_ struct ev_child *w)
908	{	1546	{
		1547	#if EV_MULTIPLICITY
		1548	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1549	#endif
909	if (ev_is_active (w))	1550	if (ev_is_active (w))
910	return;	1551	return;
911		1552
912	ev_start ((W)w, ++idlecnt);
913	array_needsize (idles, idlemax, idlecnt, );
914	idles [idlecnt - 1] = w;
915	}
916
917	void
918	ev_idle_stop (struct ev_idle *w)
919	{
920	ev_clear ((W)w);
921	if (ev_is_active (w))
922	return;
923
924	idles [w->active - 1] = idles [--idlecnt];
925	ev_stop ((W)w);
926	}
927
928	void
929	ev_prepare_start (struct ev_prepare *w)
930	{
931	if (ev_is_active (w))
932	return;
933
934	ev_start ((W)w, ++preparecnt);
935	array_needsize (prepares, preparemax, preparecnt, );
936	prepares [preparecnt - 1] = w;
937	}
938
939	void
940	ev_prepare_stop (struct ev_prepare *w)
941	{
942	ev_clear ((W)w);
943	if (ev_is_active (w))
944	return;
945
946	prepares [w->active - 1] = prepares [--preparecnt];
947	ev_stop ((W)w);
948	}
949
950	void
951	ev_check_start (struct ev_check *w)
952	{
953	if (ev_is_active (w))
954	return;
955
956	ev_start ((W)w, ++checkcnt);
957	array_needsize (checks, checkmax, checkcnt, );
958	checks [checkcnt - 1] = w;
959	}
960
961	void
962	ev_check_stop (struct ev_check *w)
963	{
964	ev_clear ((W)w);
965	if (ev_is_active (w))
966	return;
967
968	checks [w->active - 1] = checks [--checkcnt];
969	ev_stop ((W)w);
970	}
971
972	void
973	ev_child_start (struct ev_child *w)
974	{
975	if (ev_is_active (w))
976	return;
977
978	ev_start ((W)w, 1);	1553	ev_start (EV_A_ (W)w, 1);
979	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1554	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	}	1555	}
981		1556
982	void	1557	void
983	ev_child_stop (struct ev_child *w)	1558	ev_child_stop (EV_P_ struct ev_child *w)
984	{	1559	{
985	ev_clear ((W)w);	1560	ev_clear_pending (EV_A_ (W)w);
986	if (ev_is_active (w))	1561	if (!ev_is_active (w))
987	return;	1562	return;
988		1563
989	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1564	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	ev_stop ((W)w);	1565	ev_stop (EV_A_ (W)w);
991	}	1566	}
992		1567
993	/*****************************************************************************/	1568	/*****************************************************************************/
994		1569
995	struct ev_once	1570	struct ev_once
…		…
999	void (*cb)(int revents, void *arg);	1574	void (*cb)(int revents, void *arg);
1000	void *arg;	1575	void *arg;
1001	};	1576	};
1002		1577
1003	static void	1578	static void
1004	once_cb (struct ev_once *once, int revents)	1579	once_cb (EV_P_ struct ev_once *once, int revents)
1005	{	1580	{
1006	void (*cb)(int revents, void *arg) = once->cb;	1581	void (*cb)(int revents, void *arg) = once->cb;
1007	void *arg = once->arg;	1582	void *arg = once->arg;
1008		1583
1009	ev_io_stop (&once->io);	1584	ev_io_stop (EV_A_ &once->io);
1010	ev_timer_stop (&once->to);	1585	ev_timer_stop (EV_A_ &once->to);
1011	free (once);	1586	ev_free (once);
1012		1587
1013	cb (revents, arg);	1588	cb (revents, arg);
1014	}	1589	}
1015		1590
1016	static void	1591	static void
1017	once_cb_io (struct ev_io *w, int revents)	1592	once_cb_io (EV_P_ struct ev_io *w, int revents)
1018	{	1593	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1594	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1020	}	1595	}
1021		1596
1022	static void	1597	static void
1023	once_cb_to (struct ev_timer *w, int revents)	1598	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1024	{	1599	{
1025	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1600	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1026	}	1601	}
1027		1602
1028	void	1603	void
1029	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1604	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1030	{	1605	{
1031	struct ev_once *once = malloc (sizeof (struct ev_once));	1606	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1032		1607
1033	if (!once)	1608	if (!once)
1034	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1609	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1035	else	1610	else
1036	{	1611	{
1037	once->cb = cb;	1612	once->cb = cb;
1038	once->arg = arg;	1613	once->arg = arg;
1039		1614
1040	ev_watcher_init (&once->io, once_cb_io);	1615	ev_init (&once->io, once_cb_io);
1041	if (fd >= 0)	1616	if (fd >= 0)
1042	{	1617	{
1043	ev_io_set (&once->io, fd, events);	1618	ev_io_set (&once->io, fd, events);
1044	ev_io_start (&once->io);	1619	ev_io_start (EV_A_ &once->io);
1045	}	1620	}
1046		1621
1047	ev_watcher_init (&once->to, once_cb_to);	1622	ev_init (&once->to, once_cb_to);
1048	if (timeout >= 0.)	1623	if (timeout >= 0.)
1049	{	1624	{
1050	ev_timer_set (&once->to, timeout, 0.);	1625	ev_timer_set (&once->to, timeout, 0.);
1051	ev_timer_start (&once->to);	1626	ev_timer_start (EV_A_ &once->to);
1052	}	1627	}
1053	}	1628	}
1054	}	1629	}
1055		1630
1056	/*****************************************************************************/	1631	#ifdef __cplusplus
1057
1058	#if 0
1059
1060	struct ev_io wio;
1061
1062	static void
1063	sin_cb (struct ev_io *w, int revents)
1064	{
1065	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1066	}	1632	}
1067
1068	static void
1069	ocb (struct ev_timer *w, int revents)
1070	{
1071	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1072	ev_timer_stop (w);
1073	ev_timer_start (w);
1074	}
1075
1076	static void
1077	scb (struct ev_signal *w, int revents)
1078	{
1079	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1080	ev_io_stop (&wio);
1081	ev_io_start (&wio);
1082	}
1083
1084	static void
1085	gcb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "generic %x\n", revents);
1088
1089	}
1090
1091	int main (void)
1092	{
1093	ev_init (0);
1094
1095	ev_io_init (&wio, sin_cb, 0, EV_READ);
1096	ev_io_start (&wio);
1097
1098	struct ev_timer t[10000];
1099
1100	#if 0
1101	int i;
1102	for (i = 0; i < 10000; ++i)
1103	{
1104	struct ev_timer *w = t + i;
1105	ev_watcher_init (w, ocb, i);
1106	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1107	ev_timer_start (w);
1108	if (drand48 () < 0.5)
1109	ev_timer_stop (w);
1110	}
1111	#endif	1633	#endif
1112		1634
1113	struct ev_timer t1;
1114	ev_timer_init (&t1, ocb, 5, 10);
1115	ev_timer_start (&t1);
1116
1117	struct ev_signal sig;
1118	ev_signal_init (&sig, scb, SIGQUIT);
1119	ev_signal_start (&sig);
1120
1121	struct ev_check cw;
1122	ev_check_init (&cw, gcb);
1123	ev_check_start (&cw);
1124
1125	struct ev_idle iw;
1126	ev_idle_init (&iw, gcb);
1127	ev_idle_start (&iw);
1128
1129	ev_loop (0);
1130
1131	return 0;
1132	}
1133
1134	#endif
1135
1136
1137
1138

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