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Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.97 by root, Sun Nov 11 01:53:07 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 && 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	#endif
		85	/**/
		86
49	#ifndef EV_USE_MONOTONIC	87	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	88	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	89	#endif
54		90
55	#ifndef EV_USE_SELECT	91	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	92	# define EV_USE_SELECT 1
57	#endif	93	#endif
58		94
		95	#ifndef EV_USE_POLL
		96	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		97	#endif
		98
59	#ifndef EV_USE_EPOLL	99	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	100	# define EV_USE_EPOLL 0
61	#endif	101	#endif
62		102
		103	#ifndef EV_USE_KQUEUE
		104	# define EV_USE_KQUEUE 0
		105	#endif
		106
		107	#ifndef EV_USE_WIN32
		108	# ifdef WIN32
		109	# define EV_USE_WIN32 0 /* it does not exist, use select */
		110	# undef EV_USE_SELECT
		111	# define EV_USE_SELECT 1
		112	# else
		113	# define EV_USE_WIN32 0
		114	# endif
		115	#endif
		116
		117	#ifndef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 1
		119	#endif
		120
		121	/**/
		122
		123	#ifndef CLOCK_MONOTONIC
		124	# undef EV_USE_MONOTONIC
		125	# define EV_USE_MONOTONIC 0
		126	#endif
		127
63	#ifndef CLOCK_REALTIME	128	#ifndef CLOCK_REALTIME
		129	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	130	# define EV_USE_REALTIME 0
65	#endif	131	#endif
66	#ifndef EV_USE_REALTIME	132
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	133	/**/
68	#endif
69		134
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	135	#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) */	136	#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 */	137	#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 */	138	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
74		139
		140	#ifdef EV_H
		141	# include EV_H
		142	#else
75	#include "ev.h"	143	# include "ev.h"
		144	#endif
		145
		146	#if __GNUC__ >= 3
		147	# define expect(expr,value) __builtin_expect ((expr),(value))
		148	# define inline inline
		149	#else
		150	# define expect(expr,value) (expr)
		151	# define inline static
		152	#endif
		153
		154	#define expect_false(expr) expect ((expr) != 0, 0)
		155	#define expect_true(expr) expect ((expr) != 0, 1)
		156
		157	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		158	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		159
77	typedef struct ev_watcher *W;	160	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	161	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	162	typedef struct ev_watcher_time *WT;
80		163
81	static ev_tstamp now, diff; /* monotonic clock */	164	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		165
		166	#include "ev_win32.c"
		167
		168	/*****************************************************************************/
		169
		170	static void (*syserr_cb)(const char *msg);
		171
		172	void ev_set_syserr_cb (void (*cb)(const char *msg))
		173	{
		174	syserr_cb = cb;
		175	}
		176
		177	static void
		178	syserr (const char *msg)
		179	{
		180	if (!msg)
		181	msg = "(libev) system error";
		182
		183	if (syserr_cb)
		184	syserr_cb (msg);
		185	else
		186	{
		187	perror (msg);
		188	abort ();
		189	}
		190	}
		191
		192	static void *(*alloc)(void *ptr, long size);
		193
		194	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		195	{
		196	alloc = cb;
		197	}
		198
		199	static void *
		200	ev_realloc (void *ptr, long size)
		201	{
		202	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		203
		204	if (!ptr && size)
		205	{
		206	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		207	abort ();
		208	}
		209
		210	return ptr;
		211	}
		212
		213	#define ev_malloc(size) ev_realloc (0, (size))
		214	#define ev_free(ptr) ev_realloc ((ptr), 0)
		215
		216	/*****************************************************************************/
		217
		218	typedef struct
		219	{
		220	WL head;
		221	unsigned char events;
		222	unsigned char reify;
		223	} ANFD;
		224
		225	typedef struct
		226	{
		227	W w;
		228	int events;
		229	} ANPENDING;
		230
		231	#if EV_MULTIPLICITY
		232
		233	struct ev_loop
		234	{
		235	ev_tstamp ev_rt_now;
		236	#define VAR(name,decl) decl;
		237	#include "ev_vars.h"
		238	#undef VAR
		239	};
		240	#include "ev_wrap.h"
		241
		242	struct ev_loop default_loop_struct;
		243	static struct ev_loop *default_loop;
		244
		245	#else
		246
82	ev_tstamp ev_now;	247	ev_tstamp ev_rt_now;
83	int ev_method;	248	#define VAR(name,decl) static decl;
		249	#include "ev_vars.h"
		250	#undef VAR
84		251
85	static int have_monotonic; /* runtime */	252	static int default_loop;
86		253
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	254	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		255
91	/*****************************************************************************/	256	/*****************************************************************************/
92		257
93	ev_tstamp	258	ev_tstamp
94	ev_time (void)	259	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	267	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	268	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	269	#endif
105	}	270	}
106		271
107	static ev_tstamp	272	inline ev_tstamp
108	get_clock (void)	273	get_clock (void)
109	{	274	{
110	#if EV_USE_MONOTONIC	275	#if EV_USE_MONOTONIC
111	if (have_monotonic)	276	if (expect_true (have_monotonic))
112	{	277	{
113	struct timespec ts;	278	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	279	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	280	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	281	}
117	#endif	282	#endif
118		283
119	return ev_time ();	284	return ev_time ();
120	}	285	}
121		286
		287	#if EV_MULTIPLICITY
		288	ev_tstamp
		289	ev_now (EV_P)
		290	{
		291	return ev_rt_now;
		292	}
		293	#endif
		294
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	295	#define array_roundsize(type,n) ((n) | 4 & ~3)
123		296
124	#define array_needsize(base,cur,cnt,init) \	297	#define array_needsize(type,base,cur,cnt,init) \
125	if ((cnt) > cur) \	298	if (expect_false ((cnt) > cur)) \
126	{ \	299	{ \
127	int newcnt = cur; \	300	int newcnt = cur; \
128	do \	301	do \
129	{ \	302	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	303	newcnt = array_roundsize (type, newcnt << 1); \
131	} \	304	} \
132	while ((cnt) > newcnt); \	305	while ((cnt) > newcnt); \
133	\	306	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \	307	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
135	init (base + cur, newcnt - cur); \	308	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	309	cur = newcnt; \
137	}	310	}
		311
		312	#define array_slim(type,stem) \
		313	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		314	{ \
		315	stem ## max = array_roundsize (stem ## cnt >> 1); \
		316	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		317	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		318	}
		319
		320	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		321	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		322	#define array_free_microshit(stem) \
		323	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		324
		325	#define array_free(stem, idx) \
		326	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
138		327
139	/*****************************************************************************/	328	/*****************************************************************************/
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		329
150	static void	330	static void
151	anfds_init (ANFD *base, int count)	331	anfds_init (ANFD *base, int count)
152	{	332	{
153	while (count--)	333	while (count--)
154	{	334	{
155	base->head = 0;	335	base->head = 0;
156	base->events = EV_NONE;	336	base->events = EV_NONE;
		337	base->reify = 0;
		338
157	++base;	339	++base;
158	}	340	}
159	}	341	}
160		342
161	typedef struct	343	void
		344	ev_feed_event (EV_P_ void *w, int revents)
162	{	345	{
163	W w;	346	W w_ = (W)w;
164	int events;
165	} ANPENDING;
166		347
167	static ANPENDING *pendings;	348	if (w_->pending)
168	static int pendingmax, pendingcnt;	349	{
		350	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		351	return;
		352	}
169		353
170	static void
171	event (W w, int events)
172	{
173	w->pending = ++pendingcnt;	354	w_->pending = ++pendingcnt [ABSPRI (w_)];
174	array_needsize (pendings, pendingmax, pendingcnt, );	355	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
175	pendings [pendingcnt - 1].w = w;	356	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
176	pendings [pendingcnt - 1].events = events;	357	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
177	}	358	}
178		359
179	static void	360	static void
180	queue_events (W *events, int eventcnt, int type)	361	queue_events (EV_P_ W *events, int eventcnt, int type)
181	{	362	{
182	int i;	363	int i;
183		364
184	for (i = 0; i < eventcnt; ++i)	365	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);	366	ev_feed_event (EV_A_ events [i], type);
186	}	367	}
187		368
188	static void	369	inline void
189	fd_event (int fd, int events)	370	fd_event (EV_P_ int fd, int revents)
190	{	371	{
191	ANFD *anfd = anfds + fd;	372	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	373	struct ev_io *w;
193		374
194	for (w = anfd->head; w; w = w->next)	375	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
195	{	376	{
196	int ev = w->events & events;	377	int ev = w->events & revents;
197		378
198	if (ev)	379	if (ev)
199	event ((W)w, ev);	380	ev_feed_event (EV_A_ (W)w, ev);
200	}	381	}
		382	}
		383
		384	void
		385	ev_feed_fd_event (EV_P_ int fd, int revents)
		386	{
		387	fd_event (EV_A_ fd, revents);
201	}	388	}
202		389
203	/*****************************************************************************/	390	/*****************************************************************************/
204		391
205	static int *fdchanges;
206	static int fdchangemax, fdchangecnt;
207
208	static void	392	static void
209	fd_reify (void)	393	fd_reify (EV_P)
210	{	394	{
211	int i;	395	int i;
212		396
213	for (i = 0; i < fdchangecnt; ++i)	397	for (i = 0; i < fdchangecnt; ++i)
214	{	398	{
…		…
216	ANFD *anfd = anfds + fd;	400	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	401	struct ev_io *w;
218		402
219	int events = 0;	403	int events = 0;
220		404
221	for (w = anfd->head; w; w = w->next)	405	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
222	events |= w->events;	406	events |= w->events;
223		407
224	anfd->events &= ~EV_REIFY;	408	anfd->reify = 0;
225		409
226	if (anfd->events != events)
227	{
228	method_modify (fd, anfd->events, events);	410	method_modify (EV_A_ fd, anfd->events, events);
229	anfd->events = events;	411	anfd->events = events;
230	}
231	}	412	}
232		413
233	fdchangecnt = 0;	414	fdchangecnt = 0;
234	}	415	}
235		416
236	static void	417	static void
237	fd_change (int fd)	418	fd_change (EV_P_ int fd)
238	{	419	{
239	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	420	if (anfds [fd].reify)
240	return;	421	return;
241		422
242	anfds [fd].events |= EV_REIFY;	423	anfds [fd].reify = 1;
243		424
244	++fdchangecnt;	425	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	426	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
246	fdchanges [fdchangecnt - 1] = fd;	427	fdchanges [fdchangecnt - 1] = fd;
247	}	428	}
248		429
		430	static void
		431	fd_kill (EV_P_ int fd)
		432	{
		433	struct ev_io *w;
		434
		435	while ((w = (struct ev_io *)anfds [fd].head))
		436	{
		437	ev_io_stop (EV_A_ w);
		438	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		439	}
		440	}
		441
		442	static int
		443	fd_valid (int fd)
		444	{
		445	#ifdef WIN32
		446	return !!win32_get_osfhandle (fd);
		447	#else
		448	return fcntl (fd, F_GETFD) != -1;
		449	#endif
		450	}
		451
249	/* called on EBADF to verify fds */	452	/* called on EBADF to verify fds */
250	static void	453	static void
251	fd_recheck (void)	454	fd_ebadf (EV_P)
252	{	455	{
253	int fd;	456	int fd;
254		457
255	for (fd = 0; fd < anfdmax; ++fd)	458	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	459	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	460	if (!fd_valid (fd) == -1 && errno == EBADF)
258	while (anfds [fd].head)	461	fd_kill (EV_A_ fd);
		462	}
		463
		464	/* called on ENOMEM in select/poll to kill some fds and retry */
		465	static void
		466	fd_enomem (EV_P)
		467	{
		468	int fd;
		469
		470	for (fd = anfdmax; fd--; )
		471	if (anfds [fd].events)
259	{	472	{
260	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	473	fd_kill (EV_A_ fd);
261	ev_io_stop (anfds [fd].head);	474	return;
262	}	475	}
		476	}
		477
		478	/* usually called after fork if method needs to re-arm all fds from scratch */
		479	static void
		480	fd_rearm_all (EV_P)
		481	{
		482	int fd;
		483
		484	/* this should be highly optimised to not do anything but set a flag */
		485	for (fd = 0; fd < anfdmax; ++fd)
		486	if (anfds [fd].events)
		487	{
		488	anfds [fd].events = 0;
		489	fd_change (EV_A_ fd);
		490	}
263	}	491	}
264		492
265	/*****************************************************************************/	493	/*****************************************************************************/
266		494
267	static struct ev_timer **timers;
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void	495	static void
274	upheap (WT *timers, int k)	496	upheap (WT *heap, int k)
275	{	497	{
276	WT w = timers [k];	498	WT w = heap [k];
277		499
278	while (k && timers [k >> 1]->at > w->at)	500	while (k && heap [k >> 1]->at > w->at)
279	{	501	{
280	timers [k] = timers [k >> 1];	502	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
282	k >>= 1;	504	k >>= 1;
283	}	505	}
284		506
285	timers [k] = w;	507	heap [k] = w;
286	timers [k]->active = k + 1;	508	((W)heap [k])->active = k + 1;
287		509
288	}	510	}
289		511
290	static void	512	static void
291	downheap (WT *timers, int N, int k)	513	downheap (WT *heap, int N, int k)
292	{	514	{
293	WT w = timers [k];	515	WT w = heap [k];
294		516
295	while (k < (N >> 1))	517	while (k < (N >> 1))
296	{	518	{
297	int j = k << 1;	519	int j = k << 1;
298		520
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	521	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	522	++j;
301		523
302	if (w->at <= timers [j]->at)	524	if (w->at <= heap [j]->at)
303	break;	525	break;
304		526
305	timers [k] = timers [j];	527	heap [k] = heap [j];
306	timers [k]->active = k + 1;	528	((W)heap [k])->active = k + 1;
307	k = j;	529	k = j;
308	}	530	}
309		531
310	timers [k] = w;	532	heap [k] = w;
311	timers [k]->active = k + 1;	533	((W)heap [k])->active = k + 1;
		534	}
		535
		536	inline void
		537	adjustheap (WT *heap, int N, int k, ev_tstamp at)
		538	{
		539	ev_tstamp old_at = heap [k]->at;
		540	heap [k]->at = at;
		541
		542	if (old_at < at)
		543	downheap (heap, N, k);
		544	else
		545	upheap (heap, k);
312	}	546	}
313		547
314	/*****************************************************************************/	548	/*****************************************************************************/
315		549
316	typedef struct	550	typedef struct
317	{	551	{
318	struct ev_signal *head;	552	WL head;
319	sig_atomic_t gotsig;	553	sig_atomic_t volatile gotsig;
320	} ANSIG;	554	} ANSIG;
321		555
322	static ANSIG *signals;	556	static ANSIG *signals;
323	static int signalmax;	557	static int signalmax;
324		558
325	static int sigpipe [2];	559	static int sigpipe [2];
326	static sig_atomic_t gotsig;	560	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	561	static struct ev_io sigev;
328		562
329	static void	563	static void
330	signals_init (ANSIG *base, int count)	564	signals_init (ANSIG *base, int count)
331	{	565	{
332	while (count--)	566	while (count--)
333	{	567	{
334	base->head = 0;	568	base->head = 0;
335	base->gotsig = 0;	569	base->gotsig = 0;
		570
336	++base;	571	++base;
337	}	572	}
338	}	573	}
339		574
340	static void	575	static void
341	sighandler (int signum)	576	sighandler (int signum)
342	{	577	{
		578	#if WIN32
		579	signal (signum, sighandler);
		580	#endif
		581
343	signals [signum - 1].gotsig = 1;	582	signals [signum - 1].gotsig = 1;
344		583
345	if (!gotsig)	584	if (!gotsig)
346	{	585	{
		586	int old_errno = errno;
347	gotsig = 1;	587	gotsig = 1;
		588	#ifdef WIN32
		589	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		590	#else
348	write (sigpipe [1], &gotsig, 1);	591	write (sigpipe [1], &signum, 1);
		592	#endif
		593	errno = old_errno;
349	}	594	}
350	}	595	}
351		596
		597	void
		598	ev_feed_signal_event (EV_P_ int signum)
		599	{
		600	WL w;
		601
		602	#if EV_MULTIPLICITY
		603	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		604	#endif
		605
		606	--signum;
		607
		608	if (signum < 0 || signum >= signalmax)
		609	return;
		610
		611	signals [signum].gotsig = 0;
		612
		613	for (w = signals [signum].head; w; w = w->next)
		614	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		615	}
		616
352	static void	617	static void
353	sigcb (struct ev_io *iow, int revents)	618	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	619	{
355	struct ev_signal *w;
356	int sig;	620	int signum;
357		621
		622	#ifdef WIN32
		623	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		624	#else
		625	read (sigpipe [0], &revents, 1);
		626	#endif
358	gotsig = 0;	627	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		628
361	for (sig = signalmax; sig--; )	629	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	630	if (signals [signum].gotsig)
363	{	631	ev_feed_signal_event (EV_A_ signum + 1);
364	signals [sig].gotsig = 0;
365
366	for (w = signals [sig].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);
368	}
369	}	632	}
370		633
371	static void	634	static void
372	siginit (void)	635	siginit (EV_P)
373	{	636	{
		637	#ifndef WIN32
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	638	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	639	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376		640
377	/* rather than sort out wether we really need nb, set it */	641	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	642	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	643	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		644	#endif
380		645
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	646	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	647	ev_io_start (EV_A_ &sigev);
		648	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	649	}
384		650
385	/*****************************************************************************/	651	/*****************************************************************************/
386		652
387	static struct ev_idle **idles;
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397
398	static struct ev_child *childs [PID_HASHSIZE];	653	static struct ev_child *childs [PID_HASHSIZE];
		654
		655	#ifndef WIN32
		656
399	static struct ev_signal childev;	657	static struct ev_signal childev;
400		658
401	#ifndef WCONTINUED	659	#ifndef WCONTINUED
402	# define WCONTINUED 0	660	# define WCONTINUED 0
403	#endif	661	#endif
404		662
405	static void	663	static void
406	childcb (struct ev_signal *sw, int revents)	664	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	665	{
408	struct ev_child *w;	666	struct ev_child *w;
		667
		668	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		669	if (w->pid == pid || !w->pid)
		670	{
		671	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		672	w->rpid = pid;
		673	w->rstatus = status;
		674	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		675	}
		676	}
		677
		678	static void
		679	childcb (EV_P_ struct ev_signal *sw, int revents)
		680	{
409	int pid, status;	681	int pid, status;
410		682
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	683	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	684	{
413	if (w->pid == pid || w->pid == -1)	685	/* make sure we are called again until all childs have been reaped */
414	{	686	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
415	w->status = status;	687
416	event ((W)w, EV_CHILD);	688	child_reap (EV_A_ sw, pid, pid, status);
417	}	689	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		690	}
418	}	691	}
		692
		693	#endif
419		694
420	/*****************************************************************************/	695	/*****************************************************************************/
421		696
		697	#if EV_USE_KQUEUE
		698	# include "ev_kqueue.c"
		699	#endif
422	#if EV_USE_EPOLL	700	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	701	# include "ev_epoll.c"
424	#endif	702	#endif
		703	#if EV_USE_POLL
		704	# include "ev_poll.c"
		705	#endif
425	#if EV_USE_SELECT	706	#if EV_USE_SELECT
426	# include "ev_select.c"	707	# include "ev_select.c"
427	#endif	708	#endif
428		709
429	int	710	int
…		…
436	ev_version_minor (void)	717	ev_version_minor (void)
437	{	718	{
438	return EV_VERSION_MINOR;	719	return EV_VERSION_MINOR;
439	}	720	}
440		721
441	int ev_init (int flags)	722	/* return true if we are running with elevated privileges and should ignore env variables */
		723	static int
		724	enable_secure (void)
442	{	725	{
		726	#ifdef WIN32
		727	return 0;
		728	#else
		729	return getuid () != geteuid ()
		730	|| getgid () != getegid ();
		731	#endif
		732	}
		733
		734	int
		735	ev_method (EV_P)
		736	{
		737	return method;
		738	}
		739
		740	static void
		741	loop_init (EV_P_ int methods)
		742	{
443	if (!ev_method)	743	if (!method)
444	{	744	{
445	#if EV_USE_MONOTONIC	745	#if EV_USE_MONOTONIC
446	{	746	{
447	struct timespec ts;	747	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	748	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	749	have_monotonic = 1;
450	}	750	}
451	#endif	751	#endif
452		752
453	ev_now = ev_time ();	753	ev_rt_now = ev_time ();
454	now = get_clock ();	754	mn_now = get_clock ();
		755	now_floor = mn_now;
455	diff = ev_now - now;	756	rtmn_diff = ev_rt_now - mn_now;
456		757
457	if (pipe (sigpipe))	758	if (methods == EVMETHOD_AUTO)
458	return 0;	759	if (!enable_secure () && getenv ("LIBEV_METHODS"))
459		760	methods = atoi (getenv ("LIBEV_METHODS"));
		761	else
460	ev_method = EVMETHOD_NONE;	762	methods = EVMETHOD_ANY;
		763
		764	method = 0;
		765	#if EV_USE_WIN32
		766	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		767	#endif
		768	#if EV_USE_KQUEUE
		769	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		770	#endif
461	#if EV_USE_EPOLL	771	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	772	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		773	#endif
		774	#if EV_USE_POLL
		775	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
463	#endif	776	#endif
464	#if EV_USE_SELECT	777	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	778	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
466	#endif	779	#endif
467		780
		781	ev_init (&sigev, sigcb);
		782	ev_set_priority (&sigev, EV_MAXPRI);
		783	}
		784	}
		785
		786	void
		787	loop_destroy (EV_P)
		788	{
		789	int i;
		790
		791	#if EV_USE_WIN32
		792	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		793	#endif
		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_microshit (fdchange);
		812	array_free_microshit (timer);
		813	#if EV_PERIODICS
		814	array_free_microshit (periodic);
		815	#endif
		816	array_free_microshit (idle);
		817	array_free_microshit (prepare);
		818	array_free_microshit (check);
		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
468	if (ev_method)	903	if (ev_method (EV_A))
469	{	904	{
470	ev_watcher_init (&sigev, sigcb);
471	siginit ();	905	siginit (EV_A);
472		906
		907	#ifndef WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	908	ev_signal_init (&childev, childcb, SIGCHLD);
		909	ev_set_priority (&childev, EV_MAXPRI);
474	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
475	}	913	}
		914	else
		915	default_loop = 0;
476	}	916	}
477		917
478	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;
479	}	951	}
480		952
481	/*****************************************************************************/	953	/*****************************************************************************/
482		954
483	void
484	ev_prefork (void)
485	{
486	/* nop */
487	}
488
489	void
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif
502
503	ev_io_stop (&sigev);
504	close (sigpipe [0]);
505	close (sigpipe [1]);
506	pipe (sigpipe);
507	siginit ();
508	}
509
510	/*****************************************************************************/
511
512	static void	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
513	call_pending (void)	968	call_pending (EV_P)
514	{	969	{
		970	int pri;
		971
		972	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	973	while (pendingcnt [pri])
516	{	974	{
517	ANPENDING *p = pendings + --pendingcnt;	975	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		976
519	if (p->w)	977	if (p->w)
520	{	978	{
521	p->w->pending = 0;	979	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	980	EV_CB_INVOKE (p->w, p->events);
523	}	981	}
524	}	982	}
525	}	983	}
526		984
527	static void	985	static void
528	timers_reify (void)	986	timers_reify (EV_P)
529	{	987	{
530	while (timercnt && timers [0]->at <= now)	988	while (timercnt && ((WT)timers [0])->at <= mn_now)
531	{	989	{
532	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)));
533		993
534	/* first reschedule or stop timer */	994	/* first reschedule or stop timer */
535	if (w->repeat)	995	if (w->repeat)
536	{	996	{
		997	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		998
537	w->at = now + w->repeat;	999	((WT)w)->at += w->repeat;
538	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
539	downheap ((WT *)timers, timercnt, 0);	1003	downheap ((WT *)timers, timercnt, 0);
540	}	1004	}
541	else	1005	else
542	ev_timer_stop (w); /* nonrepeating: stop timer */	1006	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543		1007
544	event ((W)w, EV_TIMEOUT);	1008	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
545	}	1009	}
546	}	1010	}
547		1011
		1012	#if EV_PERIODICS
548	static void	1013	static void
549	periodics_reify (void)	1014	periodics_reify (EV_P)
550	{	1015	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	1016	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
552	{	1017	{
553	struct ev_periodic *w = periodics [0];	1018	struct ev_periodic *w = periodics [0];
554		1019
		1020	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1021
555	/* first reschedule or stop timer */	1022	/* first reschedule or stop timer */
556	if (w->interval)	1023	if (w->reschedule_cb)
557	{	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	{
558	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;
559	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));
560	downheap ((WT *)periodics, periodiccnt, 0);	1034	downheap ((WT *)periodics, periodiccnt, 0);
561	}	1035	}
562	else	1036	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	1037	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		1038
565	event ((W)w, EV_TIMEOUT);	1039	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566	}	1040	}
567	}	1041	}
568		1042
569	static void	1043	static void
570	periodics_reschedule (ev_tstamp diff)	1044	periodics_reschedule (EV_P)
571	{	1045	{
572	int i;	1046	int i;
573		1047
574	/* adjust periodics after time jump */	1048	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	1049	for (i = 0; i < periodiccnt; ++i)
576	{	1050	{
577	struct ev_periodic *w = periodics [i];	1051	struct ev_periodic *w = periodics [i];
578		1052
		1053	if (w->reschedule_cb)
		1054	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
579	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))
580	{	1092	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1093	ev_tstamp odiff = rtmn_diff;
582		1094
583	if (fabs (diff) >= 1e-4)	1095	for (i = 4; --i; ) /* loop a few times, before making important decisions */
584	{	1096	{
585	ev_periodic_stop (w);	1097	rtmn_diff = ev_rt_now - mn_now;
586	ev_periodic_start (w);
587		1098
588	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;
589	}	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) */
590	}	1112	}
591	}	1113	}
592	}	1114	else
593		1115	#endif
594	static void	1116	{
595	time_update (void)
596	{
597	int i;
598
599	ev_now = ev_time ();	1117	ev_rt_now = ev_time ();
600		1118
601	if (have_monotonic)	1119	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
602	{
603	ev_tstamp odiff = diff;
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	1120	{
607	now = get_clock ();	1121	#if EV_PERIODICS
608	diff = ev_now - now;
609
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)
611	return; /* all is well */
612
613	ev_now = ev_time ();
614	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}
619	else
620	{
621	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
622	{
623	periodics_reschedule (ev_now - now);	1122	periodics_reschedule (EV_A);
		1123	#endif
624		1124
625	/* 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 */
626	for (i = 0; i < timercnt; ++i)	1126	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	1127	((WT)timers [i])->at += ev_rt_now - mn_now;
628	}	1128	}
629		1129
630	now = ev_now;	1130	mn_now = ev_rt_now;
631	}	1131	}
632	}	1132	}
633		1133
634	int ev_loop_done;	1134	void
		1135	ev_ref (EV_P)
		1136	{
		1137	++activecnt;
		1138	}
635		1139
		1140	void
		1141	ev_unref (EV_P)
		1142	{
		1143	--activecnt;
		1144	}
		1145
		1146	static int loop_done;
		1147
		1148	void
636	void ev_loop (int flags)	1149	ev_loop (EV_P_ int flags)
637	{	1150	{
638	double block;	1151	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1152	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
640		1153
641	do	1154	do
642	{	1155	{
643	/* queue check watchers (and execute them) */	1156	/* queue check watchers (and execute them) */
644	if (preparecnt)	1157	if (expect_false (preparecnt))
645	{	1158	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1159	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	1160	call_pending (EV_A);
648	}	1161	}
649		1162
		1163	/* we might have forked, so reify kernel state if necessary */
		1164	if (expect_false (postfork))
		1165	loop_fork (EV_A);
		1166
650	/* update fd-related kernel structures */	1167	/* update fd-related kernel structures */
651	fd_reify ();	1168	fd_reify (EV_A);
652		1169
653	/* calculate blocking time */	1170	/* calculate blocking time */
654		1171
655	/* 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
656	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	{
657	ev_now = ev_time ();	1180	ev_rt_now = ev_time ();
		1181	mn_now = ev_rt_now;
		1182	}
658		1183
659	if (flags & EVLOOP_NONBLOCK || idlecnt)	1184	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;	1185	block = 0.;
661	else	1186	else
662	{	1187	{
663	block = MAX_BLOCKTIME;	1188	block = MAX_BLOCKTIME;
664		1189
665	if (timercnt)	1190	if (timercnt)
666	{	1191	{
667	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;
668	if (block > to) block = to;	1193	if (block > to) block = to;
669	}	1194	}
670		1195
		1196	#if EV_PERIODICS
671	if (periodiccnt)	1197	if (periodiccnt)
672	{	1198	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1199	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
674	if (block > to) block = to;	1200	if (block > to) block = to;
675	}	1201	}
		1202	#endif
676		1203
677	if (block < 0.) block = 0.;	1204	if (block < 0.) block = 0.;
678	}	1205	}
679		1206
680	method_poll (block);	1207	method_poll (EV_A_ block);
681		1208
682	/* update ev_now, do magic */	1209	/* update ev_rt_now, do magic */
683	time_update ();	1210	time_update (EV_A);
684		1211
685	/* queue pending timers and reschedule them */	1212	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1213	timers_reify (EV_A); /* relative timers called last */
		1214	#if EV_PERIODICS
687	periodics_reify (); /* absolute timers called first */	1215	periodics_reify (EV_A); /* absolute timers called first */
		1216	#endif
688		1217
689	/* queue idle watchers unless io or timers are pending */	1218	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	1219	if (idlecnt && !any_pending (EV_A))
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1220	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		1221
693	/* queue check watchers, to be executed first */	1222	/* queue check watchers, to be executed first */
694	if (checkcnt)	1223	if (checkcnt)
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1224	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1225
697	call_pending ();	1226	call_pending (EV_A);
698	}	1227	}
699	while (!ev_loop_done);	1228	while (activecnt && !loop_done);
700		1229
701	if (ev_loop_done != 2)	1230	if (loop_done != 2)
702	ev_loop_done = 0;	1231	loop_done = 0;
		1232	}
		1233
		1234	void
		1235	ev_unloop (EV_P_ int how)
		1236	{
		1237	loop_done = how;
703	}	1238	}
704		1239
705	/*****************************************************************************/	1240	/*****************************************************************************/
706		1241
707	static void	1242	inline void
708	wlist_add (WL *head, WL elem)	1243	wlist_add (WL *head, WL elem)
709	{	1244	{
710	elem->next = *head;	1245	elem->next = *head;
711	*head = elem;	1246	*head = elem;
712	}	1247	}
713		1248
714	static void	1249	inline void
715	wlist_del (WL *head, WL elem)	1250	wlist_del (WL *head, WL elem)
716	{	1251	{
717	while (*head)	1252	while (*head)
718	{	1253	{
719	if (*head == elem)	1254	if (*head == elem)
…		…
724		1259
725	head = &(*head)->next;	1260	head = &(*head)->next;
726	}	1261	}
727	}	1262	}
728		1263
729	static void	1264	inline void
730	ev_clear (W w)	1265	ev_clear_pending (EV_P_ W w)
731	{	1266	{
732	if (w->pending)	1267	if (w->pending)
733	{	1268	{
734	pendings [w->pending - 1].w = 0;	1269	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1270	w->pending = 0;
736	}	1271	}
737	}	1272	}
738		1273
739	static void	1274	inline void
740	ev_start (W w, int active)	1275	ev_start (EV_P_ W w, int active)
741	{	1276	{
		1277	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1278	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1279
742	w->active = active;	1280	w->active = active;
		1281	ev_ref (EV_A);
743	}	1282	}
744		1283
745	static void	1284	inline void
746	ev_stop (W w)	1285	ev_stop (EV_P_ W w)
747	{	1286	{
		1287	ev_unref (EV_A);
748	w->active = 0;	1288	w->active = 0;
749	}	1289	}
750		1290
751	/*****************************************************************************/	1291	/*****************************************************************************/
752		1292
753	void	1293	void
754	ev_io_start (struct ev_io *w)	1294	ev_io_start (EV_P_ struct ev_io *w)
755	{	1295	{
		1296	int fd = w->fd;
		1297
756	if (ev_is_active (w))	1298	if (ev_is_active (w))
757	return;	1299	return;
758		1300
759	int fd = w->fd;	1301	assert (("ev_io_start called with negative fd", fd >= 0));
760		1302
761	ev_start ((W)w, 1);	1303	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1304	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1305	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1306
765	fd_change (fd);	1307	fd_change (EV_A_ fd);
766	}	1308	}
767		1309
768	void	1310	void
769	ev_io_stop (struct ev_io *w)	1311	ev_io_stop (EV_P_ struct ev_io *w)
770	{	1312	{
771	ev_clear ((W)w);	1313	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1314	if (!ev_is_active (w))
773	return;	1315	return;
774		1316
		1317	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1318
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1319	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
777		1321
778	fd_change (w->fd);	1322	fd_change (EV_A_ w->fd);
779	}	1323	}
780		1324
781	void	1325	void
782	ev_timer_start (struct ev_timer *w)	1326	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1327	{
784	if (ev_is_active (w))	1328	if (ev_is_active (w))
785	return;	1329	return;
786		1330
787	w->at += now;	1331	((WT)w)->at += mn_now;
788		1332
789	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.));
790		1334
791	ev_start ((W)w, ++timercnt);	1335	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1336	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
793	timers [timercnt - 1] = w;	1337	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1338	upheap ((WT *)timers, timercnt - 1);
795	}
796		1339
		1340	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1341	}
		1342
797	void	1343	void
798	ev_timer_stop (struct ev_timer *w)	1344	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1345	{
800	ev_clear ((W)w);	1346	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1347	if (!ev_is_active (w))
802	return;	1348	return;
803		1349
		1350	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1351
804	if (w->active < timercnt--)	1352	if (((W)w)->active < timercnt--)
805	{	1353	{
806	timers [w->active - 1] = timers [timercnt];	1354	timers [((W)w)->active - 1] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1355	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
808	}	1356	}
809		1357
810	w->at = w->repeat;	1358	((WT)w)->at -= mn_now;
811		1359
812	ev_stop ((W)w);	1360	ev_stop (EV_A_ (W)w);
813	}	1361	}
814		1362
815	void	1363	void
816	ev_timer_again (struct ev_timer *w)	1364	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1365	{
818	if (ev_is_active (w))	1366	if (ev_is_active (w))
819	{	1367	{
820	if (w->repeat)	1368	if (w->repeat)
821	{
822	w->at = now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1369	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
824	}
825	else	1370	else
826	ev_timer_stop (w);	1371	ev_timer_stop (EV_A_ w);
827	}	1372	}
828	else if (w->repeat)	1373	else if (w->repeat)
829	ev_timer_start (w);	1374	ev_timer_start (EV_A_ w);
830	}	1375	}
831		1376
		1377	#if EV_PERIODICS
832	void	1378	void
833	ev_periodic_start (struct ev_periodic *w)	1379	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1380	{
835	if (ev_is_active (w))	1381	if (ev_is_active (w))
836	return;	1382	return;
837		1383
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1384	if (w->reschedule_cb)
839		1385	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1386	else if (w->interval)
		1387	{
		1388	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1389	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1390	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1391	}
843		1392
844	ev_start ((W)w, ++periodiccnt);	1393	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1394	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
846	periodics [periodiccnt - 1] = w;	1395	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1396	upheap ((WT *)periodics, periodiccnt - 1);
848	}
849		1397
		1398	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1399	}
		1400
850	void	1401	void
851	ev_periodic_stop (struct ev_periodic *w)	1402	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1403	{
853	ev_clear ((W)w);	1404	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1405	if (!ev_is_active (w))
855	return;	1406	return;
856		1407
		1408	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1409
857	if (w->active < periodiccnt--)	1410	if (((W)w)->active < periodiccnt--)
858	{	1411	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1412	periodics [((W)w)->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1413	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
861	}	1414	}
862		1415
863	ev_stop ((W)w);	1416	ev_stop (EV_A_ (W)w);
864	}	1417	}
865		1418
866	void	1419	void
		1420	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1421	{
		1422	/* TODO: use adjustheap and recalculation */
		1423	ev_periodic_stop (EV_A_ w);
		1424	ev_periodic_start (EV_A_ w);
		1425	}
		1426	#endif
		1427
		1428	void
867	ev_signal_start (struct ev_signal *w)	1429	ev_idle_start (EV_P_ struct ev_idle *w)
868	{	1430	{
869	if (ev_is_active (w))	1431	if (ev_is_active (w))
870	return;	1432	return;
871		1433
		1434	ev_start (EV_A_ (W)w, ++idlecnt);
		1435	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1436	idles [idlecnt - 1] = w;
		1437	}
		1438
		1439	void
		1440	ev_idle_stop (EV_P_ struct ev_idle *w)
		1441	{
		1442	ev_clear_pending (EV_A_ (W)w);
		1443	if (ev_is_active (w))
		1444	return;
		1445
		1446	idles [((W)w)->active - 1] = idles [--idlecnt];
		1447	ev_stop (EV_A_ (W)w);
		1448	}
		1449
		1450	void
		1451	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1452	{
		1453	if (ev_is_active (w))
		1454	return;
		1455
		1456	ev_start (EV_A_ (W)w, ++preparecnt);
		1457	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1458	prepares [preparecnt - 1] = w;
		1459	}
		1460
		1461	void
		1462	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1463	{
		1464	ev_clear_pending (EV_A_ (W)w);
		1465	if (ev_is_active (w))
		1466	return;
		1467
		1468	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1469	ev_stop (EV_A_ (W)w);
		1470	}
		1471
		1472	void
		1473	ev_check_start (EV_P_ struct ev_check *w)
		1474	{
		1475	if (ev_is_active (w))
		1476	return;
		1477
		1478	ev_start (EV_A_ (W)w, ++checkcnt);
		1479	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1480	checks [checkcnt - 1] = w;
		1481	}
		1482
		1483	void
		1484	ev_check_stop (EV_P_ struct ev_check *w)
		1485	{
		1486	ev_clear_pending (EV_A_ (W)w);
		1487	if (!ev_is_active (w))
		1488	return;
		1489
		1490	checks [((W)w)->active - 1] = checks [--checkcnt];
		1491	ev_stop (EV_A_ (W)w);
		1492	}
		1493
		1494	#ifndef SA_RESTART
		1495	# define SA_RESTART 0
		1496	#endif
		1497
		1498	void
		1499	ev_signal_start (EV_P_ struct ev_signal *w)
		1500	{
		1501	#if EV_MULTIPLICITY
		1502	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1503	#endif
		1504	if (ev_is_active (w))
		1505	return;
		1506
		1507	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1508
872	ev_start ((W)w, 1);	1509	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1510	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1511	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1512
876	if (!w->next)	1513	if (!((WL)w)->next)
877	{	1514	{
		1515	#if WIN32
		1516	signal (w->signum, sighandler);
		1517	#else
878	struct sigaction sa;	1518	struct sigaction sa;
879	sa.sa_handler = sighandler;	1519	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1520	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1521	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1522	sigaction (w->signum, &sa, 0);
		1523	#endif
883	}	1524	}
884	}	1525	}
885		1526
886	void	1527	void
887	ev_signal_stop (struct ev_signal *w)	1528	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1529	{
889	ev_clear ((W)w);	1530	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1531	if (!ev_is_active (w))
891	return;	1532	return;
892		1533
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1534	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1535	ev_stop (EV_A_ (W)w);
895		1536
896	if (!signals [w->signum - 1].head)	1537	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1538	signal (w->signum, SIG_DFL);
898	}	1539	}
899		1540
900	void	1541	void
901	ev_idle_start (struct ev_idle *w)	1542	ev_child_start (EV_P_ struct ev_child *w)
902	{	1543	{
		1544	#if EV_MULTIPLICITY
		1545	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1546	#endif
903	if (ev_is_active (w))	1547	if (ev_is_active (w))
904	return;	1548	return;
905		1549
906	ev_start ((W)w, ++idlecnt);
907	array_needsize (idles, idlemax, idlecnt, );
908	idles [idlecnt - 1] = w;
909	}
910
911	void
912	ev_idle_stop (struct ev_idle *w)
913	{
914	ev_clear ((W)w);
915	if (ev_is_active (w))
916	return;
917
918	idles [w->active - 1] = idles [--idlecnt];
919	ev_stop ((W)w);
920	}
921
922	void
923	ev_prepare_start (struct ev_prepare *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );
930	prepares [preparecnt - 1] = w;
931	}
932
933	void
934	ev_prepare_stop (struct ev_prepare *w)
935	{
936	ev_clear ((W)w);
937	if (ev_is_active (w))
938	return;
939
940	prepares [w->active - 1] = prepares [--preparecnt];
941	ev_stop ((W)w);
942	}
943
944	void
945	ev_check_start (struct ev_check *w)
946	{
947	if (ev_is_active (w))
948	return;
949
950	ev_start ((W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );
952	checks [checkcnt - 1] = w;
953	}
954
955	void
956	ev_check_stop (struct ev_check *w)
957	{
958	ev_clear ((W)w);
959	if (ev_is_active (w))
960	return;
961
962	checks [w->active - 1] = checks [--checkcnt];
963	ev_stop ((W)w);
964	}
965
966	void
967	ev_child_start (struct ev_child *w)
968	{
969	if (ev_is_active (w))
970	return;
971
972	ev_start ((W)w, 1);	1550	ev_start (EV_A_ (W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1551	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}	1552	}
975		1553
976	void	1554	void
977	ev_child_stop (struct ev_child *w)	1555	ev_child_stop (EV_P_ struct ev_child *w)
978	{	1556	{
979	ev_clear ((W)w);	1557	ev_clear_pending (EV_A_ (W)w);
980	if (ev_is_active (w))	1558	if (!ev_is_active (w))
981	return;	1559	return;
982		1560
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1561	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1562	ev_stop (EV_A_ (W)w);
985	}	1563	}
986		1564
987	/*****************************************************************************/	1565	/*****************************************************************************/
988		1566
989	struct ev_once	1567	struct ev_once
…		…
993	void (*cb)(int revents, void *arg);	1571	void (*cb)(int revents, void *arg);
994	void *arg;	1572	void *arg;
995	};	1573	};
996		1574
997	static void	1575	static void
998	once_cb (struct ev_once *once, int revents)	1576	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1577	{
1000	void (*cb)(int revents, void *arg) = once->cb;	1578	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	1579	void *arg = once->arg;
1002		1580
1003	ev_io_stop (&once->io);	1581	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1582	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1583	ev_free (once);
1006		1584
1007	cb (revents, arg);	1585	cb (revents, arg);
1008	}	1586	}
1009		1587
1010	static void	1588	static void
1011	once_cb_io (struct ev_io *w, int revents)	1589	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1590	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1591	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014	}	1592	}
1015		1593
1016	static void	1594	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1595	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1596	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1597	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020	}	1598	}
1021		1599
1022	void	1600	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1601	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024	{	1602	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1603	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026		1604
1027	if (!once)	1605	if (!once)
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1606	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029	else	1607	else
1030	{	1608	{
1031	once->cb = cb;	1609	once->cb = cb;
1032	once->arg = arg;	1610	once->arg = arg;
1033		1611
1034	ev_watcher_init (&once->io, once_cb_io);	1612	ev_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1613	if (fd >= 0)
1036	{	1614	{
1037	ev_io_set (&once->io, fd, events);	1615	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1616	ev_io_start (EV_A_ &once->io);
1039	}	1617	}
1040		1618
1041	ev_watcher_init (&once->to, once_cb_to);	1619	ev_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1620	if (timeout >= 0.)
1043	{	1621	{
1044	ev_timer_set (&once->to, timeout, 0.);	1622	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1623	ev_timer_start (EV_A_ &once->to);
1046	}	1624	}
1047	}	1625	}
1048	}	1626	}
1049		1627
1050	/*****************************************************************************/	1628	#ifdef __cplusplus
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}	1629	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif	1630	#endif
1106		1631
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}
1127
1128	#endif
1129
1130
1131
1132

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