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Comparing libev/ev.c (file contents):
Revision 1.34 by root, Thu Nov 1 11:43:11 2007 UTC vs.
Revision 1.96 by root, Sun Nov 11 01:50:36 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	# define EV_USE_MONOTONIC 1
		41	# define EV_USE_REALTIME 1
		42	# endif
		43
		44	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)
		45	# define EV_USE_SELECT 1
		46	# endif
		47
		48	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)
		49	# define EV_USE_POLL 1
		50	# endif
		51
		52	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)
		53	# define EV_USE_EPOLL 1
		54	# endif
		55
		56	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)
		57	# define EV_USE_KQUEUE 1
		58	# endif
		59
31	#endif	60	#endif
32		61
33	#include <math.h>	62	#include <math.h>
34	#include <stdlib.h>	63	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	64	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	65	#include <stddef.h>
39		66
40	#include <stdio.h>	67	#include <stdio.h>
41		68
42	#include <assert.h>	69	#include <assert.h>
43	#include <errno.h>	70	#include <errno.h>
44	#include <sys/types.h>	71	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	72	#include <time.h>
48		73
		74	#include <signal.h>
		75
		76	#ifndef WIN32
		77	# include <unistd.h>
		78	# include <sys/time.h>
		79	# include <sys/wait.h>
		80	#endif
		81	/**/
		82
49	#ifndef EV_USE_MONOTONIC	83	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	84	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	85	#endif
54		86
55	#ifndef EV_USE_SELECT	87	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	88	# define EV_USE_SELECT 1
57	#endif	89	#endif
58		90
		91	#ifndef EV_USE_POLL
		92	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		93	#endif
		94
59	#ifndef EV_USE_EPOLL	95	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	96	# define EV_USE_EPOLL 0
61	#endif	97	#endif
62		98
		99	#ifndef EV_USE_KQUEUE
		100	# define EV_USE_KQUEUE 0
		101	#endif
		102
		103	#ifndef EV_USE_WIN32
		104	# ifdef WIN32
		105	# define EV_USE_WIN32 0 /* it does not exist, use select */
		106	# undef EV_USE_SELECT
		107	# define EV_USE_SELECT 1
		108	# else
		109	# define EV_USE_WIN32 0
		110	# endif
		111	#endif
		112
		113	#ifndef EV_USE_REALTIME
		114	# define EV_USE_REALTIME 1
		115	#endif
		116
		117	/**/
		118
		119	#ifndef CLOCK_MONOTONIC
		120	# undef EV_USE_MONOTONIC
		121	# define EV_USE_MONOTONIC 0
		122	#endif
		123
63	#ifndef CLOCK_REALTIME	124	#ifndef CLOCK_REALTIME
		125	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	126	# define EV_USE_REALTIME 0
65	#endif	127	#endif
66	#ifndef EV_USE_REALTIME	128
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	129	/**/
68	#endif
69		130
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	131	#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) */	132	#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 */	133	#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 */	134	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
74		135
		136	#ifdef EV_H
		137	# include EV_H
		138	#else
75	#include "ev.h"	139	# include "ev.h"
		140	#endif
		141
		142	#if __GNUC__ >= 3
		143	# define expect(expr,value) __builtin_expect ((expr),(value))
		144	# define inline inline
		145	#else
		146	# define expect(expr,value) (expr)
		147	# define inline static
		148	#endif
		149
		150	#define expect_false(expr) expect ((expr) != 0, 0)
		151	#define expect_true(expr) expect ((expr) != 0, 1)
		152
		153	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		154	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		155
77	typedef struct ev_watcher *W;	156	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	157	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	158	typedef struct ev_watcher_time *WT;
80		159
81	static ev_tstamp now, diff; /* monotonic clock */	160	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		161
		162	#include "ev_win32.c"
		163
		164	/*****************************************************************************/
		165
		166	static void (*syserr_cb)(const char *msg);
		167
		168	void ev_set_syserr_cb (void (*cb)(const char *msg))
		169	{
		170	syserr_cb = cb;
		171	}
		172
		173	static void
		174	syserr (const char *msg)
		175	{
		176	if (!msg)
		177	msg = "(libev) system error";
		178
		179	if (syserr_cb)
		180	syserr_cb (msg);
		181	else
		182	{
		183	perror (msg);
		184	abort ();
		185	}
		186	}
		187
		188	static void *(*alloc)(void *ptr, long size);
		189
		190	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		191	{
		192	alloc = cb;
		193	}
		194
		195	static void *
		196	ev_realloc (void *ptr, long size)
		197	{
		198	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		199
		200	if (!ptr && size)
		201	{
		202	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		203	abort ();
		204	}
		205
		206	return ptr;
		207	}
		208
		209	#define ev_malloc(size) ev_realloc (0, (size))
		210	#define ev_free(ptr) ev_realloc ((ptr), 0)
		211
		212	/*****************************************************************************/
		213
		214	typedef struct
		215	{
		216	WL head;
		217	unsigned char events;
		218	unsigned char reify;
		219	} ANFD;
		220
		221	typedef struct
		222	{
		223	W w;
		224	int events;
		225	} ANPENDING;
		226
		227	#if EV_MULTIPLICITY
		228
		229	struct ev_loop
		230	{
		231	ev_tstamp ev_rt_now;
		232	#define VAR(name,decl) decl;
		233	#include "ev_vars.h"
		234	#undef VAR
		235	};
		236	#include "ev_wrap.h"
		237
		238	struct ev_loop default_loop_struct;
		239	static struct ev_loop *default_loop;
		240
		241	#else
		242
82	ev_tstamp ev_now;	243	ev_tstamp ev_rt_now;
83	int ev_method;	244	#define VAR(name,decl) static decl;
		245	#include "ev_vars.h"
		246	#undef VAR
84		247
85	static int have_monotonic; /* runtime */	248	static int default_loop;
86		249
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	250	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		251
91	/*****************************************************************************/	252	/*****************************************************************************/
92		253
93	ev_tstamp	254	ev_tstamp
94	ev_time (void)	255	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	263	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	264	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	265	#endif
105	}	266	}
106		267
107	static ev_tstamp	268	inline ev_tstamp
108	get_clock (void)	269	get_clock (void)
109	{	270	{
110	#if EV_USE_MONOTONIC	271	#if EV_USE_MONOTONIC
111	if (have_monotonic)	272	if (expect_true (have_monotonic))
112	{	273	{
113	struct timespec ts;	274	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	275	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	276	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	277	}
117	#endif	278	#endif
118		279
119	return ev_time ();	280	return ev_time ();
120	}	281	}
121		282
		283	#if EV_MULTIPLICITY
		284	ev_tstamp
		285	ev_now (EV_P)
		286	{
		287	return ev_rt_now;
		288	}
		289	#endif
		290
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	291	#define array_roundsize(type,n) ((n) | 4 & ~3)
123		292
124	#define array_needsize(base,cur,cnt,init) \	293	#define array_needsize(type,base,cur,cnt,init) \
125	if ((cnt) > cur) \	294	if (expect_false ((cnt) > cur)) \
126	{ \	295	{ \
127	int newcnt = cur; \	296	int newcnt = cur; \
128	do \	297	do \
129	{ \	298	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	299	newcnt = array_roundsize (type, newcnt << 1); \
131	} \	300	} \
132	while ((cnt) > newcnt); \	301	while ((cnt) > newcnt); \
133	\	302	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \	303	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
135	init (base + cur, newcnt - cur); \	304	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	305	cur = newcnt; \
137	}	306	}
		307
		308	#define array_slim(type,stem) \
		309	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		310	{ \
		311	stem ## max = array_roundsize (stem ## cnt >> 1); \
		312	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		313	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		314	}
		315
		316	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		317	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		318	#define array_free_microshit(stem) \
		319	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		320
		321	#define array_free(stem, idx) \
		322	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
138		323
139	/*****************************************************************************/	324	/*****************************************************************************/
140
141	typedef struct
142	{
143	struct ev_io *head;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147
148	static ANFD *anfds;
149	static int anfdmax;
150		325
151	static void	326	static void
152	anfds_init (ANFD *base, int count)	327	anfds_init (ANFD *base, int count)
153	{	328	{
154	while (count--)	329	while (count--)
…		…
159		334
160	++base;	335	++base;
161	}	336	}
162	}	337	}
163		338
164	typedef struct	339	void
		340	ev_feed_event (EV_P_ void *w, int revents)
165	{	341	{
166	W w;	342	W w_ = (W)w;
167	int events;
168	} ANPENDING;
169		343
170	static ANPENDING *pendings;
171	static int pendingmax, pendingcnt;
172
173	static void
174	event (W w, int events)
175	{
176	if (w->pending)	344	if (w_->pending)
177	{	345	{
178	pendings [w->pending - 1].events |= events;	346	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
179	return;	347	return;
180	}	348	}
181		349
182	w->pending = ++pendingcnt;	350	w_->pending = ++pendingcnt [ABSPRI (w_)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	351	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
184	pendings [pendingcnt - 1].w = w;	352	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
185	pendings [pendingcnt - 1].events = events;	353	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
186	}	354	}
187		355
188	static void	356	static void
189	queue_events (W *events, int eventcnt, int type)	357	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	358	{
191	int i;	359	int i;
192		360
193	for (i = 0; i < eventcnt; ++i)	361	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	362	ev_feed_event (EV_A_ events [i], type);
195	}	363	}
196		364
197	static void	365	inline void
198	fd_event (int fd, int events)	366	fd_event (EV_P_ int fd, int revents)
199	{	367	{
200	ANFD *anfd = anfds + fd;	368	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	369	struct ev_io *w;
202		370
203	for (w = anfd->head; w; w = w->next)	371	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
204	{	372	{
205	int ev = w->events & events;	373	int ev = w->events & revents;
206		374
207	if (ev)	375	if (ev)
208	event ((W)w, ev);	376	ev_feed_event (EV_A_ (W)w, ev);
209	}	377	}
		378	}
		379
		380	void
		381	ev_feed_fd_event (EV_P_ int fd, int revents)
		382	{
		383	fd_event (EV_A_ fd, revents);
210	}	384	}
211		385
212	/*****************************************************************************/	386	/*****************************************************************************/
213		387
214	static int *fdchanges;
215	static int fdchangemax, fdchangecnt;
216
217	static void	388	static void
218	fd_reify (void)	389	fd_reify (EV_P)
219	{	390	{
220	int i;	391	int i;
221		392
222	for (i = 0; i < fdchangecnt; ++i)	393	for (i = 0; i < fdchangecnt; ++i)
223	{	394	{
…		…
225	ANFD *anfd = anfds + fd;	396	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	397	struct ev_io *w;
227		398
228	int events = 0;	399	int events = 0;
229		400
230	for (w = anfd->head; w; w = w->next)	401	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
231	events |= w->events;	402	events |= w->events;
232		403
233	anfd->reify = 0;	404	anfd->reify = 0;
234		405
235	if (anfd->events != events)
236	{
237	method_modify (fd, anfd->events, events);	406	method_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	407	anfd->events = events;
239	}
240	}	408	}
241		409
242	fdchangecnt = 0;	410	fdchangecnt = 0;
243	}	411	}
244		412
245	static void	413	static void
246	fd_change (int fd)	414	fd_change (EV_P_ int fd)
247	{	415	{
248	if (anfds [fd].reify || fdchangecnt < 0)	416	if (anfds [fd].reify)
249	return;	417	return;
250		418
251	anfds [fd].reify = 1;	419	anfds [fd].reify = 1;
252		420
253	++fdchangecnt;	421	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	422	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
255	fdchanges [fdchangecnt - 1] = fd;	423	fdchanges [fdchangecnt - 1] = fd;
256	}	424	}
257		425
		426	static void
		427	fd_kill (EV_P_ int fd)
		428	{
		429	struct ev_io *w;
		430
		431	while ((w = (struct ev_io *)anfds [fd].head))
		432	{
		433	ev_io_stop (EV_A_ w);
		434	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		435	}
		436	}
		437
		438	static int
		439	fd_valid (int fd)
		440	{
		441	#ifdef WIN32
		442	return !!win32_get_osfhandle (fd);
		443	#else
		444	return fcntl (fd, F_GETFD) != -1;
		445	#endif
		446	}
		447
258	/* called on EBADF to verify fds */	448	/* called on EBADF to verify fds */
259	static void	449	static void
260	fd_recheck (void)	450	fd_ebadf (EV_P)
261	{	451	{
262	int fd;	452	int fd;
263		453
264	for (fd = 0; fd < anfdmax; ++fd)	454	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	455	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	456	if (!fd_valid (fd) == -1 && errno == EBADF)
267	while (anfds [fd].head)	457	fd_kill (EV_A_ fd);
		458	}
		459
		460	/* called on ENOMEM in select/poll to kill some fds and retry */
		461	static void
		462	fd_enomem (EV_P)
		463	{
		464	int fd;
		465
		466	for (fd = anfdmax; fd--; )
		467	if (anfds [fd].events)
268	{	468	{
269	ev_io_stop (anfds [fd].head);	469	fd_kill (EV_A_ fd);
270	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	470	return;
271	}	471	}
		472	}
		473
		474	/* usually called after fork if method needs to re-arm all fds from scratch */
		475	static void
		476	fd_rearm_all (EV_P)
		477	{
		478	int fd;
		479
		480	/* this should be highly optimised to not do anything but set a flag */
		481	for (fd = 0; fd < anfdmax; ++fd)
		482	if (anfds [fd].events)
		483	{
		484	anfds [fd].events = 0;
		485	fd_change (EV_A_ fd);
		486	}
272	}	487	}
273		488
274	/*****************************************************************************/	489	/*****************************************************************************/
275		490
276	static struct ev_timer **timers;
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void	491	static void
283	upheap (WT *timers, int k)	492	upheap (WT *heap, int k)
284	{	493	{
285	WT w = timers [k];	494	WT w = heap [k];
286		495
287	while (k && timers [k >> 1]->at > w->at)	496	while (k && heap [k >> 1]->at > w->at)
288	{	497	{
289	timers [k] = timers [k >> 1];	498	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	499	((W)heap [k])->active = k + 1;
291	k >>= 1;	500	k >>= 1;
292	}	501	}
293		502
294	timers [k] = w;	503	heap [k] = w;
295	timers [k]->active = k + 1;	504	((W)heap [k])->active = k + 1;
296		505
297	}	506	}
298		507
299	static void	508	static void
300	downheap (WT *timers, int N, int k)	509	downheap (WT *heap, int N, int k)
301	{	510	{
302	WT w = timers [k];	511	WT w = heap [k];
303		512
304	while (k < (N >> 1))	513	while (k < (N >> 1))
305	{	514	{
306	int j = k << 1;	515	int j = k << 1;
307		516
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	517	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	518	++j;
310		519
311	if (w->at <= timers [j]->at)	520	if (w->at <= heap [j]->at)
312	break;	521	break;
313		522
314	timers [k] = timers [j];	523	heap [k] = heap [j];
315	timers [k]->active = k + 1;	524	((W)heap [k])->active = k + 1;
316	k = j;	525	k = j;
317	}	526	}
318		527
319	timers [k] = w;	528	heap [k] = w;
320	timers [k]->active = k + 1;	529	((W)heap [k])->active = k + 1;
		530	}
		531
		532	inline void
		533	adjustheap (WT *heap, int N, int k, ev_tstamp at)
		534	{
		535	ev_tstamp old_at = heap [k]->at;
		536	heap [k]->at = at;
		537
		538	if (old_at < at)
		539	downheap (heap, N, k);
		540	else
		541	upheap (heap, k);
321	}	542	}
322		543
323	/*****************************************************************************/	544	/*****************************************************************************/
324		545
325	typedef struct	546	typedef struct
326	{	547	{
327	struct ev_signal *head;	548	WL head;
328	sig_atomic_t volatile gotsig;	549	sig_atomic_t volatile gotsig;
329	} ANSIG;	550	} ANSIG;
330		551
331	static ANSIG *signals;	552	static ANSIG *signals;
332	static int signalmax;	553	static int signalmax;
…		…
348	}	569	}
349		570
350	static void	571	static void
351	sighandler (int signum)	572	sighandler (int signum)
352	{	573	{
		574	#if WIN32
		575	signal (signum, sighandler);
		576	#endif
		577
353	signals [signum - 1].gotsig = 1;	578	signals [signum - 1].gotsig = 1;
354		579
355	if (!gotsig)	580	if (!gotsig)
356	{	581	{
		582	int old_errno = errno;
357	gotsig = 1;	583	gotsig = 1;
		584	#ifdef WIN32
		585	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		586	#else
358	write (sigpipe [1], &signum, 1);	587	write (sigpipe [1], &signum, 1);
		588	#endif
		589	errno = old_errno;
359	}	590	}
360	}	591	}
361		592
		593	void
		594	ev_feed_signal_event (EV_P_ int signum)
		595	{
		596	WL w;
		597
		598	#if EV_MULTIPLICITY
		599	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		600	#endif
		601
		602	--signum;
		603
		604	if (signum < 0 || signum >= signalmax)
		605	return;
		606
		607	signals [signum].gotsig = 0;
		608
		609	for (w = signals [signum].head; w; w = w->next)
		610	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		611	}
		612
362	static void	613	static void
363	sigcb (struct ev_io *iow, int revents)	614	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	615	{
365	struct ev_signal *w;
366	int sig;	616	int signum;
367		617
		618	#ifdef WIN32
		619	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		620	#else
368	read (sigpipe [0], &revents, 1);	621	read (sigpipe [0], &revents, 1);
		622	#endif
369	gotsig = 0;	623	gotsig = 0;
370		624
371	for (sig = signalmax; sig--; )	625	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	626	if (signals [signum].gotsig)
373	{	627	ev_feed_signal_event (EV_A_ signum + 1);
374	signals [sig].gotsig = 0;
375
376	for (w = signals [sig].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);
378	}
379	}	628	}
380		629
381	static void	630	static void
382	siginit (void)	631	siginit (EV_P)
383	{	632	{
		633	#ifndef WIN32
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	634	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	635	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386		636
387	/* rather than sort out wether we really need nb, set it */	637	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	638	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	639	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		640	#endif
390		641
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	642	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	643	ev_io_start (EV_A_ &sigev);
		644	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	645	}
394		646
395	/*****************************************************************************/	647	/*****************************************************************************/
396		648
397	static struct ev_idle **idles;
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407
408	static struct ev_child *childs [PID_HASHSIZE];	649	static struct ev_child *childs [PID_HASHSIZE];
		650
		651	#ifndef WIN32
		652
409	static struct ev_signal childev;	653	static struct ev_signal childev;
410		654
411	#ifndef WCONTINUED	655	#ifndef WCONTINUED
412	# define WCONTINUED 0	656	# define WCONTINUED 0
413	#endif	657	#endif
414		658
415	static void	659	static void
416	childcb (struct ev_signal *sw, int revents)	660	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	661	{
418	struct ev_child *w;	662	struct ev_child *w;
		663
		664	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		665	if (w->pid == pid || !w->pid)
		666	{
		667	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		668	w->rpid = pid;
		669	w->rstatus = status;
		670	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		671	}
		672	}
		673
		674	static void
		675	childcb (EV_P_ struct ev_signal *sw, int revents)
		676	{
419	int pid, status;	677	int pid, status;
420		678
421	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	679	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	680	{
423	if (w->pid == pid || w->pid == -1)	681	/* make sure we are called again until all childs have been reaped */
424	{	682	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
425	w->status = status;	683
426	event ((W)w, EV_CHILD);	684	child_reap (EV_A_ sw, pid, pid, status);
427	}	685	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		686	}
428	}	687	}
		688
		689	#endif
429		690
430	/*****************************************************************************/	691	/*****************************************************************************/
431		692
		693	#if EV_USE_KQUEUE
		694	# include "ev_kqueue.c"
		695	#endif
432	#if EV_USE_EPOLL	696	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	697	# include "ev_epoll.c"
434	#endif	698	#endif
		699	#if EV_USE_POLL
		700	# include "ev_poll.c"
		701	#endif
435	#if EV_USE_SELECT	702	#if EV_USE_SELECT
436	# include "ev_select.c"	703	# include "ev_select.c"
437	#endif	704	#endif
438		705
439	int	706	int
…		…
446	ev_version_minor (void)	713	ev_version_minor (void)
447	{	714	{
448	return EV_VERSION_MINOR;	715	return EV_VERSION_MINOR;
449	}	716	}
450		717
451	int ev_init (int flags)	718	/* return true if we are running with elevated privileges and should ignore env variables */
		719	static int
		720	enable_secure (void)
452	{	721	{
		722	#ifdef WIN32
		723	return 0;
		724	#else
		725	return getuid () != geteuid ()
		726	|| getgid () != getegid ();
		727	#endif
		728	}
		729
		730	int
		731	ev_method (EV_P)
		732	{
		733	return method;
		734	}
		735
		736	static void
		737	loop_init (EV_P_ int methods)
		738	{
453	if (!ev_method)	739	if (!method)
454	{	740	{
455	#if EV_USE_MONOTONIC	741	#if EV_USE_MONOTONIC
456	{	742	{
457	struct timespec ts;	743	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	744	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	745	have_monotonic = 1;
460	}	746	}
461	#endif	747	#endif
462		748
463	ev_now = ev_time ();	749	ev_rt_now = ev_time ();
464	now = get_clock ();	750	mn_now = get_clock ();
		751	now_floor = mn_now;
465	diff = ev_now - now;	752	rtmn_diff = ev_rt_now - mn_now;
466		753
467	if (pipe (sigpipe))	754	if (methods == EVMETHOD_AUTO)
468	return 0;	755	if (!enable_secure () && getenv ("LIBEV_METHODS"))
469		756	methods = atoi (getenv ("LIBEV_METHODS"));
		757	else
470	ev_method = EVMETHOD_NONE;	758	methods = EVMETHOD_ANY;
		759
		760	method = 0;
		761	#if EV_USE_WIN32
		762	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		763	#endif
		764	#if EV_USE_KQUEUE
		765	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		766	#endif
471	#if EV_USE_EPOLL	767	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	768	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		769	#endif
		770	#if EV_USE_POLL
		771	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
473	#endif	772	#endif
474	#if EV_USE_SELECT	773	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	774	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
476	#endif	775	#endif
477		776
		777	ev_init (&sigev, sigcb);
		778	ev_set_priority (&sigev, EV_MAXPRI);
		779	}
		780	}
		781
		782	void
		783	loop_destroy (EV_P)
		784	{
		785	int i;
		786
		787	#if EV_USE_WIN32
		788	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		789	#endif
		790	#if EV_USE_KQUEUE
		791	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		792	#endif
		793	#if EV_USE_EPOLL
		794	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		795	#endif
		796	#if EV_USE_POLL
		797	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		798	#endif
		799	#if EV_USE_SELECT
		800	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		801	#endif
		802
		803	for (i = NUMPRI; i--; )
		804	array_free (pending, [i]);
		805
		806	/* have to use the microsoft-never-gets-it-right macro */
		807	array_free_microshit (fdchange);
		808	array_free_microshit (timer);
		809	#if EV_PERIODICS
		810	array_free_microshit (periodic);
		811	#endif
		812	array_free_microshit (idle);
		813	array_free_microshit (prepare);
		814	array_free_microshit (check);
		815
		816	method = 0;
		817	}
		818
		819	static void
		820	loop_fork (EV_P)
		821	{
		822	#if EV_USE_EPOLL
		823	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		824	#endif
		825	#if EV_USE_KQUEUE
		826	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		827	#endif
		828
		829	if (ev_is_active (&sigev))
		830	{
		831	/* default loop */
		832
		833	ev_ref (EV_A);
		834	ev_io_stop (EV_A_ &sigev);
		835	close (sigpipe [0]);
		836	close (sigpipe [1]);
		837
		838	while (pipe (sigpipe))
		839	syserr ("(libev) error creating pipe");
		840
		841	siginit (EV_A);
		842	}
		843
		844	postfork = 0;
		845	}
		846
		847	#if EV_MULTIPLICITY
		848	struct ev_loop *
		849	ev_loop_new (int methods)
		850	{
		851	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		852
		853	memset (loop, 0, sizeof (struct ev_loop));
		854
		855	loop_init (EV_A_ methods);
		856
		857	if (ev_method (EV_A))
		858	return loop;
		859
		860	return 0;
		861	}
		862
		863	void
		864	ev_loop_destroy (EV_P)
		865	{
		866	loop_destroy (EV_A);
		867	ev_free (loop);
		868	}
		869
		870	void
		871	ev_loop_fork (EV_P)
		872	{
		873	postfork = 1;
		874	}
		875
		876	#endif
		877
		878	#if EV_MULTIPLICITY
		879	struct ev_loop *
		880	#else
		881	int
		882	#endif
		883	ev_default_loop (int methods)
		884	{
		885	if (sigpipe [0] == sigpipe [1])
		886	if (pipe (sigpipe))
		887	return 0;
		888
		889	if (!default_loop)
		890	{
		891	#if EV_MULTIPLICITY
		892	struct ev_loop *loop = default_loop = &default_loop_struct;
		893	#else
		894	default_loop = 1;
		895	#endif
		896
		897	loop_init (EV_A_ methods);
		898
478	if (ev_method)	899	if (ev_method (EV_A))
479	{	900	{
480	ev_watcher_init (&sigev, sigcb);
481	siginit ();	901	siginit (EV_A);
482		902
		903	#ifndef WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	904	ev_signal_init (&childev, childcb, SIGCHLD);
		905	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	906	ev_signal_start (EV_A_ &childev);
		907	ev_unref (EV_A); /* child watcher should not keep loop alive */
		908	#endif
485	}	909	}
		910	else
		911	default_loop = 0;
486	}	912	}
487		913
488	return ev_method;	914	return default_loop;
		915	}
		916
		917	void
		918	ev_default_destroy (void)
		919	{
		920	#if EV_MULTIPLICITY
		921	struct ev_loop *loop = default_loop;
		922	#endif
		923
		924	#ifndef WIN32
		925	ev_ref (EV_A); /* child watcher */
		926	ev_signal_stop (EV_A_ &childev);
		927	#endif
		928
		929	ev_ref (EV_A); /* signal watcher */
		930	ev_io_stop (EV_A_ &sigev);
		931
		932	close (sigpipe [0]); sigpipe [0] = 0;
		933	close (sigpipe [1]); sigpipe [1] = 0;
		934
		935	loop_destroy (EV_A);
		936	}
		937
		938	void
		939	ev_default_fork (void)
		940	{
		941	#if EV_MULTIPLICITY
		942	struct ev_loop *loop = default_loop;
		943	#endif
		944
		945	if (method)
		946	postfork = 1;
489	}	947	}
490		948
491	/*****************************************************************************/	949	/*****************************************************************************/
492		950
493	void
494	ev_prefork (void)
495	{
496	/* nop */
497	}
498
499	void
500	ev_postfork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_postfork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif
512
513	ev_io_stop (&sigev);
514	close (sigpipe [0]);
515	close (sigpipe [1]);
516	pipe (sigpipe);
517	siginit ();
518	}
519
520	/*****************************************************************************/
521
522	static void	951	static int
		952	any_pending (EV_P)
		953	{
		954	int pri;
		955
		956	for (pri = NUMPRI; pri--; )
		957	if (pendingcnt [pri])
		958	return 1;
		959
		960	return 0;
		961	}
		962
		963	static void
523	call_pending (void)	964	call_pending (EV_P)
524	{	965	{
		966	int pri;
		967
		968	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	969	while (pendingcnt [pri])
526	{	970	{
527	ANPENDING *p = pendings + --pendingcnt;	971	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		972
529	if (p->w)	973	if (p->w)
530	{	974	{
531	p->w->pending = 0;	975	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	976	EV_CB_INVOKE (p->w, p->events);
533	}	977	}
534	}	978	}
535	}	979	}
536		980
537	static void	981	static void
538	timers_reify (void)	982	timers_reify (EV_P)
539	{	983	{
540	while (timercnt && timers [0]->at <= now)	984	while (timercnt && ((WT)timers [0])->at <= mn_now)
541	{	985	{
542	struct ev_timer *w = timers [0];	986	struct ev_timer *w = timers [0];
		987
		988	assert (("inactive timer on timer heap detected", ev_is_active (w)));
543		989
544	/* first reschedule or stop timer */	990	/* first reschedule or stop timer */
545	if (w->repeat)	991	if (w->repeat)
546	{	992	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	993	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		994
548	w->at = now + w->repeat;	995	((WT)w)->at += w->repeat;
		996	if (((WT)w)->at < mn_now)
		997	((WT)w)->at = mn_now;
		998
549	downheap ((WT *)timers, timercnt, 0);	999	downheap ((WT *)timers, timercnt, 0);
550	}	1000	}
551	else	1001	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	1002	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		1003
554	event ((W)w, EV_TIMEOUT);	1004	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
555	}	1005	}
556	}	1006	}
557		1007
		1008	#if EV_PERIODICS
558	static void	1009	static void
559	periodics_reify (void)	1010	periodics_reify (EV_P)
560	{	1011	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	1012	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
562	{	1013	{
563	struct ev_periodic *w = periodics [0];	1014	struct ev_periodic *w = periodics [0];
564		1015
		1016	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1017
565	/* first reschedule or stop timer */	1018	/* first reschedule or stop timer */
566	if (w->interval)	1019	if (w->reschedule_cb)
567	{	1020	{
		1021	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1022
		1023	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1024	downheap ((WT *)periodics, periodiccnt, 0);
		1025	}
		1026	else if (w->interval)
		1027	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1028	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1029	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	1030	downheap ((WT *)periodics, periodiccnt, 0);
571	}	1031	}
572	else	1032	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	1033	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		1034
575	event ((W)w, EV_PERIODIC);	1035	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
576	}	1036	}
577	}	1037	}
578		1038
579	static void	1039	static void
580	periodics_reschedule (ev_tstamp diff)	1040	periodics_reschedule (EV_P)
581	{	1041	{
582	int i;	1042	int i;
583		1043
584	/* adjust periodics after time jump */	1044	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	1045	for (i = 0; i < periodiccnt; ++i)
586	{	1046	{
587	struct ev_periodic *w = periodics [i];	1047	struct ev_periodic *w = periodics [i];
588		1048
		1049	if (w->reschedule_cb)
		1050	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
589	if (w->interval)	1051	else if (w->interval)
		1052	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1053	}
		1054
		1055	/* now rebuild the heap */
		1056	for (i = periodiccnt >> 1; i--; )
		1057	downheap ((WT *)periodics, periodiccnt, i);
		1058	}
		1059	#endif
		1060
		1061	inline int
		1062	time_update_monotonic (EV_P)
		1063	{
		1064	mn_now = get_clock ();
		1065
		1066	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1067	{
		1068	ev_rt_now = rtmn_diff + mn_now;
		1069	return 0;
		1070	}
		1071	else
		1072	{
		1073	now_floor = mn_now;
		1074	ev_rt_now = ev_time ();
		1075	return 1;
		1076	}
		1077	}
		1078
		1079	static void
		1080	time_update (EV_P)
		1081	{
		1082	int i;
		1083
		1084	#if EV_USE_MONOTONIC
		1085	if (expect_true (have_monotonic))
		1086	{
		1087	if (time_update_monotonic (EV_A))
590	{	1088	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1089	ev_tstamp odiff = rtmn_diff;
592		1090
593	if (fabs (diff) >= 1e-4)	1091	for (i = 4; --i; ) /* loop a few times, before making important decisions */
594	{	1092	{
595	ev_periodic_stop (w);	1093	rtmn_diff = ev_rt_now - mn_now;
596	ev_periodic_start (w);
597		1094
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1095	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1096	return; /* all is well */
		1097
		1098	ev_rt_now = ev_time ();
		1099	mn_now = get_clock ();
		1100	now_floor = mn_now;
599	}	1101	}
		1102
		1103	# if EV_PERIODICS
		1104	periodics_reschedule (EV_A);
		1105	# endif
		1106	/* no timer adjustment, as the monotonic clock doesn't jump */
		1107	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
600	}	1108	}
601	}	1109	}
602	}	1110	else
603		1111	#endif
604	static void	1112	{
605	time_update (void)
606	{
607	int i;
608
609	ev_now = ev_time ();	1113	ev_rt_now = ev_time ();
610		1114
611	if (have_monotonic)	1115	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
612	{
613	ev_tstamp odiff = diff;
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	1116	{
617	now = get_clock ();	1117	#if EV_PERIODICS
618	diff = ev_now - now;
619
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)
621	return; /* all is well */
622
623	ev_now = ev_time ();
624	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}
629	else
630	{
631	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
632	{
633	periodics_reschedule (ev_now - now);	1118	periodics_reschedule (EV_A);
		1119	#endif
634		1120
635	/* adjust timers. this is easy, as the offset is the same for all */	1121	/* adjust timers. this is easy, as the offset is the same for all */
636	for (i = 0; i < timercnt; ++i)	1122	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	1123	((WT)timers [i])->at += ev_rt_now - mn_now;
638	}	1124	}
639		1125
640	now = ev_now;	1126	mn_now = ev_rt_now;
641	}	1127	}
642	}	1128	}
643		1129
644	int ev_loop_done;	1130	void
		1131	ev_ref (EV_P)
		1132	{
		1133	++activecnt;
		1134	}
645		1135
		1136	void
		1137	ev_unref (EV_P)
		1138	{
		1139	--activecnt;
		1140	}
		1141
		1142	static int loop_done;
		1143
		1144	void
646	void ev_loop (int flags)	1145	ev_loop (EV_P_ int flags)
647	{	1146	{
648	double block;	1147	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1148	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650		1149
651	do	1150	do
652	{	1151	{
653	/* queue check watchers (and execute them) */	1152	/* queue check watchers (and execute them) */
654	if (preparecnt)	1153	if (expect_false (preparecnt))
655	{	1154	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1155	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	1156	call_pending (EV_A);
658	}	1157	}
659		1158
		1159	/* we might have forked, so reify kernel state if necessary */
		1160	if (expect_false (postfork))
		1161	loop_fork (EV_A);
		1162
660	/* update fd-related kernel structures */	1163	/* update fd-related kernel structures */
661	fd_reify ();	1164	fd_reify (EV_A);
662		1165
663	/* calculate blocking time */	1166	/* calculate blocking time */
664		1167
665	/* we only need this for !monotonic clockor timers, but as we basically	1168	/* we only need this for !monotonic clock or timers, but as we basically
666	always have timers, we just calculate it always */	1169	always have timers, we just calculate it always */
		1170	#if EV_USE_MONOTONIC
		1171	if (expect_true (have_monotonic))
		1172	time_update_monotonic (EV_A);
		1173	else
		1174	#endif
		1175	{
667	ev_now = ev_time ();	1176	ev_rt_now = ev_time ();
		1177	mn_now = ev_rt_now;
		1178	}
668		1179
669	if (flags & EVLOOP_NONBLOCK || idlecnt)	1180	if (flags & EVLOOP_NONBLOCK || idlecnt)
670	block = 0.;	1181	block = 0.;
671	else	1182	else
672	{	1183	{
673	block = MAX_BLOCKTIME;	1184	block = MAX_BLOCKTIME;
674		1185
675	if (timercnt)	1186	if (timercnt)
676	{	1187	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1188	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
678	if (block > to) block = to;	1189	if (block > to) block = to;
679	}	1190	}
680		1191
		1192	#if EV_PERIODICS
681	if (periodiccnt)	1193	if (periodiccnt)
682	{	1194	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1195	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
684	if (block > to) block = to;	1196	if (block > to) block = to;
685	}	1197	}
		1198	#endif
686		1199
687	if (block < 0.) block = 0.;	1200	if (block < 0.) block = 0.;
688	}	1201	}
689		1202
690	method_poll (block);	1203	method_poll (EV_A_ block);
691		1204
692	/* update ev_now, do magic */	1205	/* update ev_rt_now, do magic */
693	time_update ();	1206	time_update (EV_A);
694		1207
695	/* queue pending timers and reschedule them */	1208	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1209	timers_reify (EV_A); /* relative timers called last */
		1210	#if EV_PERIODICS
697	periodics_reify (); /* absolute timers called first */	1211	periodics_reify (EV_A); /* absolute timers called first */
		1212	#endif
698		1213
699	/* queue idle watchers unless io or timers are pending */	1214	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	1215	if (idlecnt && !any_pending (EV_A))
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1216	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		1217
703	/* queue check watchers, to be executed first */	1218	/* queue check watchers, to be executed first */
704	if (checkcnt)	1219	if (checkcnt)
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1220	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1221
707	call_pending ();	1222	call_pending (EV_A);
708	}	1223	}
709	while (!ev_loop_done);	1224	while (activecnt && !loop_done);
710		1225
711	if (ev_loop_done != 2)	1226	if (loop_done != 2)
712	ev_loop_done = 0;	1227	loop_done = 0;
		1228	}
		1229
		1230	void
		1231	ev_unloop (EV_P_ int how)
		1232	{
		1233	loop_done = how;
713	}	1234	}
714		1235
715	/*****************************************************************************/	1236	/*****************************************************************************/
716		1237
717	static void	1238	inline void
718	wlist_add (WL *head, WL elem)	1239	wlist_add (WL *head, WL elem)
719	{	1240	{
720	elem->next = *head;	1241	elem->next = *head;
721	*head = elem;	1242	*head = elem;
722	}	1243	}
723		1244
724	static void	1245	inline void
725	wlist_del (WL *head, WL elem)	1246	wlist_del (WL *head, WL elem)
726	{	1247	{
727	while (*head)	1248	while (*head)
728	{	1249	{
729	if (*head == elem)	1250	if (*head == elem)
…		…
734		1255
735	head = &(*head)->next;	1256	head = &(*head)->next;
736	}	1257	}
737	}	1258	}
738		1259
739	static void	1260	inline void
740	ev_clear_pending (W w)	1261	ev_clear_pending (EV_P_ W w)
741	{	1262	{
742	if (w->pending)	1263	if (w->pending)
743	{	1264	{
744	pendings [w->pending - 1].w = 0;	1265	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1266	w->pending = 0;
746	}	1267	}
747	}	1268	}
748		1269
749	static void	1270	inline void
750	ev_start (W w, int active)	1271	ev_start (EV_P_ W w, int active)
751	{	1272	{
		1273	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1274	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1275
752	w->active = active;	1276	w->active = active;
		1277	ev_ref (EV_A);
753	}	1278	}
754		1279
755	static void	1280	inline void
756	ev_stop (W w)	1281	ev_stop (EV_P_ W w)
757	{	1282	{
		1283	ev_unref (EV_A);
758	w->active = 0;	1284	w->active = 0;
759	}	1285	}
760		1286
761	/*****************************************************************************/	1287	/*****************************************************************************/
762		1288
763	void	1289	void
764	ev_io_start (struct ev_io *w)	1290	ev_io_start (EV_P_ struct ev_io *w)
765	{	1291	{
		1292	int fd = w->fd;
		1293
766	if (ev_is_active (w))	1294	if (ev_is_active (w))
767	return;	1295	return;
768		1296
769	int fd = w->fd;
770
771	assert (("ev_io_start called with negative fd", fd >= 0));	1297	assert (("ev_io_start called with negative fd", fd >= 0));
772		1298
773	ev_start ((W)w, 1);	1299	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1300	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1301	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1302
777	fd_change (fd);	1303	fd_change (EV_A_ fd);
778	}	1304	}
779		1305
780	void	1306	void
781	ev_io_stop (struct ev_io *w)	1307	ev_io_stop (EV_P_ struct ev_io *w)
782	{	1308	{
783	ev_clear_pending ((W)w);	1309	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1310	if (!ev_is_active (w))
785	return;	1311	return;
786		1312
		1313	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1314
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1315	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1316	ev_stop (EV_A_ (W)w);
789		1317
790	fd_change (w->fd);	1318	fd_change (EV_A_ w->fd);
791	}	1319	}
792		1320
793	void	1321	void
794	ev_timer_start (struct ev_timer *w)	1322	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1323	{
796	if (ev_is_active (w))	1324	if (ev_is_active (w))
797	return;	1325	return;
798		1326
799	w->at += now;	1327	((WT)w)->at += mn_now;
800		1328
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1329	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1330
803	ev_start ((W)w, ++timercnt);	1331	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1332	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
805	timers [timercnt - 1] = w;	1333	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1334	upheap ((WT *)timers, timercnt - 1);
807	}
808		1335
		1336	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1337	}
		1338
809	void	1339	void
810	ev_timer_stop (struct ev_timer *w)	1340	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1341	{
812	ev_clear_pending ((W)w);	1342	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1343	if (!ev_is_active (w))
814	return;	1344	return;
815		1345
		1346	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1347
816	if (w->active < timercnt--)	1348	if (((W)w)->active < timercnt--)
817	{	1349	{
818	timers [w->active - 1] = timers [timercnt];	1350	timers [((W)w)->active - 1] = timers [timercnt];
819	downheap ((WT *)timers, timercnt, w->active - 1);	1351	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1352	}
821		1353
822	w->at = w->repeat;	1354	((WT)w)->at -= mn_now;
823		1355
824	ev_stop ((W)w);	1356	ev_stop (EV_A_ (W)w);
825	}	1357	}
826		1358
827	void	1359	void
828	ev_timer_again (struct ev_timer *w)	1360	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1361	{
830	if (ev_is_active (w))	1362	if (ev_is_active (w))
831	{	1363	{
832	if (w->repeat)	1364	if (w->repeat)
833	{
834	w->at = now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1365	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
836	}
837	else	1366	else
838	ev_timer_stop (w);	1367	ev_timer_stop (EV_A_ w);
839	}	1368	}
840	else if (w->repeat)	1369	else if (w->repeat)
841	ev_timer_start (w);	1370	ev_timer_start (EV_A_ w);
842	}	1371	}
843		1372
		1373	#if EV_PERIODICS
844	void	1374	void
845	ev_periodic_start (struct ev_periodic *w)	1375	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1376	{
847	if (ev_is_active (w))	1377	if (ev_is_active (w))
848	return;	1378	return;
849		1379
		1380	if (w->reschedule_cb)
		1381	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1382	else if (w->interval)
		1383	{
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1384	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1385	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1386	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1387	}
855		1388
856	ev_start ((W)w, ++periodiccnt);	1389	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1390	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
858	periodics [periodiccnt - 1] = w;	1391	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1392	upheap ((WT *)periodics, periodiccnt - 1);
860	}
861		1393
		1394	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1395	}
		1396
862	void	1397	void
863	ev_periodic_stop (struct ev_periodic *w)	1398	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1399	{
865	ev_clear_pending ((W)w);	1400	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1401	if (!ev_is_active (w))
867	return;	1402	return;
868		1403
		1404	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1405
869	if (w->active < periodiccnt--)	1406	if (((W)w)->active < periodiccnt--)
870	{	1407	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1408	periodics [((W)w)->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1409	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
873	}	1410	}
874		1411
875	ev_stop ((W)w);	1412	ev_stop (EV_A_ (W)w);
876	}	1413	}
877		1414
878	void	1415	void
		1416	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1417	{
		1418	/* TODO: use adjustheap and recalculation */
		1419	ev_periodic_stop (EV_A_ w);
		1420	ev_periodic_start (EV_A_ w);
		1421	}
		1422	#endif
		1423
		1424	void
879	ev_signal_start (struct ev_signal *w)	1425	ev_idle_start (EV_P_ struct ev_idle *w)
880	{	1426	{
881	if (ev_is_active (w))	1427	if (ev_is_active (w))
882	return;	1428	return;
883		1429
		1430	ev_start (EV_A_ (W)w, ++idlecnt);
		1431	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1432	idles [idlecnt - 1] = w;
		1433	}
		1434
		1435	void
		1436	ev_idle_stop (EV_P_ struct ev_idle *w)
		1437	{
		1438	ev_clear_pending (EV_A_ (W)w);
		1439	if (ev_is_active (w))
		1440	return;
		1441
		1442	idles [((W)w)->active - 1] = idles [--idlecnt];
		1443	ev_stop (EV_A_ (W)w);
		1444	}
		1445
		1446	void
		1447	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1448	{
		1449	if (ev_is_active (w))
		1450	return;
		1451
		1452	ev_start (EV_A_ (W)w, ++preparecnt);
		1453	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1454	prepares [preparecnt - 1] = w;
		1455	}
		1456
		1457	void
		1458	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1459	{
		1460	ev_clear_pending (EV_A_ (W)w);
		1461	if (ev_is_active (w))
		1462	return;
		1463
		1464	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1465	ev_stop (EV_A_ (W)w);
		1466	}
		1467
		1468	void
		1469	ev_check_start (EV_P_ struct ev_check *w)
		1470	{
		1471	if (ev_is_active (w))
		1472	return;
		1473
		1474	ev_start (EV_A_ (W)w, ++checkcnt);
		1475	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1476	checks [checkcnt - 1] = w;
		1477	}
		1478
		1479	void
		1480	ev_check_stop (EV_P_ struct ev_check *w)
		1481	{
		1482	ev_clear_pending (EV_A_ (W)w);
		1483	if (!ev_is_active (w))
		1484	return;
		1485
		1486	checks [((W)w)->active - 1] = checks [--checkcnt];
		1487	ev_stop (EV_A_ (W)w);
		1488	}
		1489
		1490	#ifndef SA_RESTART
		1491	# define SA_RESTART 0
		1492	#endif
		1493
		1494	void
		1495	ev_signal_start (EV_P_ struct ev_signal *w)
		1496	{
		1497	#if EV_MULTIPLICITY
		1498	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1499	#endif
		1500	if (ev_is_active (w))
		1501	return;
		1502
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1503	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1504
886	ev_start ((W)w, 1);	1505	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1506	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1507	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1508
890	if (!w->next)	1509	if (!((WL)w)->next)
891	{	1510	{
		1511	#if WIN32
		1512	signal (w->signum, sighandler);
		1513	#else
892	struct sigaction sa;	1514	struct sigaction sa;
893	sa.sa_handler = sighandler;	1515	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1516	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1517	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1518	sigaction (w->signum, &sa, 0);
		1519	#endif
897	}	1520	}
898	}	1521	}
899		1522
900	void	1523	void
901	ev_signal_stop (struct ev_signal *w)	1524	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1525	{
903	ev_clear_pending ((W)w);	1526	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1527	if (!ev_is_active (w))
905	return;	1528	return;
906		1529
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1530	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1531	ev_stop (EV_A_ (W)w);
909		1532
910	if (!signals [w->signum - 1].head)	1533	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1534	signal (w->signum, SIG_DFL);
912	}	1535	}
913		1536
914	void	1537	void
915	ev_idle_start (struct ev_idle *w)	1538	ev_child_start (EV_P_ struct ev_child *w)
916	{	1539	{
		1540	#if EV_MULTIPLICITY
		1541	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1542	#endif
917	if (ev_is_active (w))	1543	if (ev_is_active (w))
918	return;	1544	return;
919		1545
920	ev_start ((W)w, ++idlecnt);
921	array_needsize (idles, idlemax, idlecnt, );
922	idles [idlecnt - 1] = w;
923	}
924
925	void
926	ev_idle_stop (struct ev_idle *w)
927	{
928	ev_clear_pending ((W)w);
929	if (ev_is_active (w))
930	return;
931
932	idles [w->active - 1] = idles [--idlecnt];
933	ev_stop ((W)w);
934	}
935
936	void
937	ev_prepare_start (struct ev_prepare *w)
938	{
939	if (ev_is_active (w))
940	return;
941
942	ev_start ((W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );
944	prepares [preparecnt - 1] = w;
945	}
946
947	void
948	ev_prepare_stop (struct ev_prepare *w)
949	{
950	ev_clear_pending ((W)w);
951	if (ev_is_active (w))
952	return;
953
954	prepares [w->active - 1] = prepares [--preparecnt];
955	ev_stop ((W)w);
956	}
957
958	void
959	ev_check_start (struct ev_check *w)
960	{
961	if (ev_is_active (w))
962	return;
963
964	ev_start ((W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );
966	checks [checkcnt - 1] = w;
967	}
968
969	void
970	ev_check_stop (struct ev_check *w)
971	{
972	ev_clear_pending ((W)w);
973	if (ev_is_active (w))
974	return;
975
976	checks [w->active - 1] = checks [--checkcnt];
977	ev_stop ((W)w);
978	}
979
980	void
981	ev_child_start (struct ev_child *w)
982	{
983	if (ev_is_active (w))
984	return;
985
986	ev_start ((W)w, 1);	1546	ev_start (EV_A_ (W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1547	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}	1548	}
989		1549
990	void	1550	void
991	ev_child_stop (struct ev_child *w)	1551	ev_child_stop (EV_P_ struct ev_child *w)
992	{	1552	{
993	ev_clear_pending ((W)w);	1553	ev_clear_pending (EV_A_ (W)w);
994	if (ev_is_active (w))	1554	if (!ev_is_active (w))
995	return;	1555	return;
996		1556
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1557	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1558	ev_stop (EV_A_ (W)w);
999	}	1559	}
1000		1560
1001	/*****************************************************************************/	1561	/*****************************************************************************/
1002		1562
1003	struct ev_once	1563	struct ev_once
…		…
1007	void (*cb)(int revents, void *arg);	1567	void (*cb)(int revents, void *arg);
1008	void *arg;	1568	void *arg;
1009	};	1569	};
1010		1570
1011	static void	1571	static void
1012	once_cb (struct ev_once *once, int revents)	1572	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1573	{
1014	void (*cb)(int revents, void *arg) = once->cb;	1574	void (*cb)(int revents, void *arg) = once->cb;
1015	void *arg = once->arg;	1575	void *arg = once->arg;
1016		1576
1017	ev_io_stop (&once->io);	1577	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1578	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1579	ev_free (once);
1020		1580
1021	cb (revents, arg);	1581	cb (revents, arg);
1022	}	1582	}
1023		1583
1024	static void	1584	static void
1025	once_cb_io (struct ev_io *w, int revents)	1585	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1586	{
1027	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1587	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1028	}	1588	}
1029		1589
1030	static void	1590	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1591	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1592	{
1033	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1593	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1034	}	1594	}
1035		1595
1036	void	1596	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1597	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038	{	1598	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1599	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1040		1600
1041	if (!once)	1601	if (!once)
1042	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1602	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1043	else	1603	else
1044	{	1604	{
1045	once->cb = cb;	1605	once->cb = cb;
1046	once->arg = arg;	1606	once->arg = arg;
1047		1607
1048	ev_watcher_init (&once->io, once_cb_io);	1608	ev_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1609	if (fd >= 0)
1050	{	1610	{
1051	ev_io_set (&once->io, fd, events);	1611	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1612	ev_io_start (EV_A_ &once->io);
1053	}	1613	}
1054		1614
1055	ev_watcher_init (&once->to, once_cb_to);	1615	ev_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1616	if (timeout >= 0.)
1057	{	1617	{
1058	ev_timer_set (&once->to, timeout, 0.);	1618	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1619	ev_timer_start (EV_A_ &once->to);
1060	}	1620	}
1061	}	1621	}
1062	}	1622	}
1063		1623
1064	/*****************************************************************************/	1624	#ifdef __cplusplus
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}	1625	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif	1626	#endif
1120		1627
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}
1141
1142	#endif
1143
1144
1145
1146

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