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Comparing libev/ev.c (file contents):
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC vs.
Revision 1.102 by root, Sun Nov 11 17:56:11 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# include "config.h"
		38
		39	# if HAVE_CLOCK_GETTIME
		40	# ifndef EV_USE_MONOTONIC
		41	# define EV_USE_MONOTONIC 1
		42	# endif
		43	# ifndef EV_USE_REALTIME
		44	# define EV_USE_REALTIME 1
		45	# endif
		46	# endif
		47
		48	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)
		49	# define EV_USE_SELECT 1
		50	# endif
		51
		52	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)
		53	# define EV_USE_POLL 1
		54	# endif
		55
		56	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)
		57	# define EV_USE_EPOLL 1
		58	# endif
		59
		60	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)
		61	# define EV_USE_KQUEUE 1
		62	# endif
		63
		64	#endif
		65
30	#include <math.h>	66	#include <math.h>
31	#include <stdlib.h>	67	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	68	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	69	#include <stddef.h>
36		70
37	#include <stdio.h>	71	#include <stdio.h>
38		72
39	#include <assert.h>	73	#include <assert.h>
40	#include <errno.h>	74	#include <errno.h>
41	#include <sys/types.h>	75	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	76	#include <time.h>
45		77
		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
46	#ifndef HAVE_MONOTONIC	87	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	88	# define EV_USE_MONOTONIC 1
		89	#endif
		90
		91	#ifndef EV_USE_SELECT
		92	# define EV_USE_SELECT 1
		93	#endif
		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
		99	#ifndef EV_USE_EPOLL
		100	# define EV_USE_EPOLL 0
		101	#endif
		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
49	# endif	114	# endif
50	#endif	115	#endif
51		116
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	117	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	118	# define EV_USE_REALTIME 1
62	#endif	119	#endif
		120
		121	/**/
		122
		123	#ifndef CLOCK_MONOTONIC
		124	# undef EV_USE_MONOTONIC
		125	# define EV_USE_MONOTONIC 0
		126	#endif
		127
		128	#ifndef CLOCK_REALTIME
		129	# undef EV_USE_REALTIME
		130	# define EV_USE_REALTIME 0
		131	#endif
		132
		133	/**/
63		134
64	#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) */
65	#define MAX_BLOCKTIME 60.	136	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	137	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		138	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
67		139
		140	#ifdef EV_H
		141	# include EV_H
		142	#else
68	#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)
69		159
70	typedef struct ev_watcher *W;	160	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	161	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	162	typedef struct ev_watcher_time *WT;
73		163
74	static ev_tstamp now, diff; /* monotonic clock */	164	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		165
		166	#ifdef WIN32
		167	# include "ev_win32.c"
		168	#endif
		169
		170	/*****************************************************************************/
		171
		172	static void (*syserr_cb)(const char *msg);
		173
		174	void ev_set_syserr_cb (void (*cb)(const char *msg))
		175	{
		176	syserr_cb = cb;
		177	}
		178
		179	static void
		180	syserr (const char *msg)
		181	{
		182	if (!msg)
		183	msg = "(libev) system error";
		184
		185	if (syserr_cb)
		186	syserr_cb (msg);
		187	else
		188	{
		189	perror (msg);
		190	abort ();
		191	}
		192	}
		193
		194	static void *(*alloc)(void *ptr, long size);
		195
		196	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		197	{
		198	alloc = cb;
		199	}
		200
		201	static void *
		202	ev_realloc (void *ptr, long size)
		203	{
		204	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		205
		206	if (!ptr && size)
		207	{
		208	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		209	abort ();
		210	}
		211
		212	return ptr;
		213	}
		214
		215	#define ev_malloc(size) ev_realloc (0, (size))
		216	#define ev_free(ptr) ev_realloc ((ptr), 0)
		217
		218	/*****************************************************************************/
		219
		220	typedef struct
		221	{
		222	WL head;
		223	unsigned char events;
		224	unsigned char reify;
		225	} ANFD;
		226
		227	typedef struct
		228	{
		229	W w;
		230	int events;
		231	} ANPENDING;
		232
		233	#if EV_MULTIPLICITY
		234
		235	struct ev_loop
		236	{
		237	ev_tstamp ev_rt_now;
		238	#define ev_rt_now ((loop)->ev_rt_now)
		239	#define VAR(name,decl) decl;
		240	#include "ev_vars.h"
		241	#undef VAR
		242	};
		243	#include "ev_wrap.h"
		244
		245	struct ev_loop default_loop_struct;
		246	static struct ev_loop *default_loop;
		247
		248	#else
		249
75	ev_tstamp ev_now;	250	ev_tstamp ev_rt_now;
76	int ev_method;	251	#define VAR(name,decl) static decl;
		252	#include "ev_vars.h"
		253	#undef VAR
77		254
78	static int have_monotonic; /* runtime */	255	static int default_loop;
79		256
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	257	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		258
84	/*****************************************************************************/	259	/*****************************************************************************/
85		260
86	ev_tstamp	261	ev_tstamp
87	ev_time (void)	262	ev_time (void)
88	{	263	{
89	#if HAVE_REALTIME	264	#if EV_USE_REALTIME
90	struct timespec ts;	265	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	266	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	267	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	268	#else
94	struct timeval tv;	269	struct timeval tv;
95	gettimeofday (&tv, 0);	270	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	271	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	272	#endif
98	}	273	}
99		274
100	static ev_tstamp	275	inline ev_tstamp
101	get_clock (void)	276	get_clock (void)
102	{	277	{
103	#if HAVE_MONOTONIC	278	#if EV_USE_MONOTONIC
104	if (have_monotonic)	279	if (expect_true (have_monotonic))
105	{	280	{
106	struct timespec ts;	281	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	282	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	283	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	284	}
110	#endif	285	#endif
111		286
112	return ev_time ();	287	return ev_time ();
113	}	288	}
114		289
		290	#if EV_MULTIPLICITY
		291	ev_tstamp
		292	ev_now (EV_P)
		293	{
		294	return ev_rt_now;
		295	}
		296	#endif
		297
		298	#define array_roundsize(type,n) ((n) | 4 & ~3)
		299
115	#define array_needsize(base,cur,cnt,init) \	300	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	301	if (expect_false ((cnt) > cur)) \
117	{ \	302	{ \
118	int newcnt = cur ? cur << 1 : 16; \	303	int newcnt = cur; \
		304	do \
		305	{ \
		306	newcnt = array_roundsize (type, newcnt << 1); \
		307	} \
		308	while ((cnt) > newcnt); \
		309	\
119	base = realloc (base, sizeof (*base) * (newcnt)); \	310	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
120	init (base + cur, newcnt - cur); \	311	init (base + cur, newcnt - cur); \
121	cur = newcnt; \	312	cur = newcnt; \
122	}	313	}
		314
		315	#define array_slim(type,stem) \
		316	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		317	{ \
		318	stem ## max = array_roundsize (stem ## cnt >> 1); \
		319	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		320	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		321	}
		322
		323	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		324	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		325	#define array_free_microshit(stem) \
		326	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		327
		328	#define array_free(stem, idx) \
		329	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
123		330
124	/*****************************************************************************/	331	/*****************************************************************************/
125		332
126	typedef struct
127	{
128	struct ev_io *head;
129	unsigned char wev, rev; /* want, received event set */
130	} ANFD;
131
132	static ANFD *anfds;
133	static int anfdmax;
134
135	static int *fdchanges;
136	static int fdchangemax, fdchangecnt;
137
138	static void	333	static void
139	anfds_init (ANFD *base, int count)	334	anfds_init (ANFD *base, int count)
140	{	335	{
141	while (count--)	336	while (count--)
142	{	337	{
143	base->head = 0;	338	base->head = 0;
144	base->wev = base->rev = EV_NONE;	339	base->events = EV_NONE;
		340	base->reify = 0;
		341
145	++base;	342	++base;
146	}	343	}
147	}	344	}
148		345
149	typedef struct	346	void
		347	ev_feed_event (EV_P_ void *w, int revents)
150	{	348	{
151	W w;	349	W w_ = (W)w;
152	int events;
153	} ANPENDING;
154		350
155	static ANPENDING *pendings;	351	if (w_->pending)
156	static int pendingmax, pendingcnt;
157
158	static void
159	event (W w, int events)
160	{
161	if (w->active)
162	{	352	{
163	w->pending = ++pendingcnt;
164	array_needsize (pendings, pendingmax, pendingcnt, );
165	pendings [pendingcnt - 1].w = w;
166	pendings [pendingcnt - 1].events = events;	353	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		354	return;
167	}	355	}
168	}
169		356
		357	w_->pending = ++pendingcnt [ABSPRI (w_)];
		358	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
		359	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		360	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		361	}
		362
170	static void	363	static void
		364	queue_events (EV_P_ W *events, int eventcnt, int type)
		365	{
		366	int i;
		367
		368	for (i = 0; i < eventcnt; ++i)
		369	ev_feed_event (EV_A_ events [i], type);
		370	}
		371
		372	inline void
171	fd_event (int fd, int events)	373	fd_event (EV_P_ int fd, int revents)
172	{	374	{
173	ANFD *anfd = anfds + fd;	375	ANFD *anfd = anfds + fd;
174	struct ev_io *w;	376	struct ev_io *w;
175		377
176	for (w = anfd->head; w; w = w->next)	378	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
177	{	379	{
178	int ev = w->events & events;	380	int ev = w->events & revents;
179		381
180	if (ev)	382	if (ev)
181	event ((W)w, ev);	383	ev_feed_event (EV_A_ (W)w, ev);
182	}	384	}
183	}	385	}
184		386
		387	void
		388	ev_feed_fd_event (EV_P_ int fd, int revents)
		389	{
		390	fd_event (EV_A_ fd, revents);
		391	}
		392
		393	/*****************************************************************************/
		394
185	static void	395	static void
186	queue_events (W *events, int eventcnt, int type)	396	fd_reify (EV_P)
187	{	397	{
188	int i;	398	int i;
189		399
190	for (i = 0; i < eventcnt; ++i)	400	for (i = 0; i < fdchangecnt; ++i)
191	event (events [i], type);	401	{
		402	int fd = fdchanges [i];
		403	ANFD *anfd = anfds + fd;
		404	struct ev_io *w;
		405
		406	int events = 0;
		407
		408	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		409	events |= w->events;
		410
		411	anfd->reify = 0;
		412
		413	method_modify (EV_A_ fd, anfd->events, events);
		414	anfd->events = events;
		415	}
		416
		417	fdchangecnt = 0;
		418	}
		419
		420	static void
		421	fd_change (EV_P_ int fd)
		422	{
		423	if (anfds [fd].reify)
		424	return;
		425
		426	anfds [fd].reify = 1;
		427
		428	++fdchangecnt;
		429	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		430	fdchanges [fdchangecnt - 1] = fd;
		431	}
		432
		433	static void
		434	fd_kill (EV_P_ int fd)
		435	{
		436	struct ev_io *w;
		437
		438	while ((w = (struct ev_io *)anfds [fd].head))
		439	{
		440	ev_io_stop (EV_A_ w);
		441	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		442	}
		443	}
		444
		445	static int
		446	fd_valid (int fd)
		447	{
		448	#ifdef WIN32
		449	return !!win32_get_osfhandle (fd);
		450	#else
		451	return fcntl (fd, F_GETFD) != -1;
		452	#endif
192	}	453	}
193		454
194	/* called on EBADF to verify fds */	455	/* called on EBADF to verify fds */
195	static void	456	static void
196	fd_recheck ()	457	fd_ebadf (EV_P)
197	{	458	{
198	int fd;	459	int fd;
199		460
200	for (fd = 0; fd < anfdmax; ++fd)	461	for (fd = 0; fd < anfdmax; ++fd)
201	if (anfds [fd].wev)	462	if (anfds [fd].events)
202	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	463	if (!fd_valid (fd) == -1 && errno == EBADF)
203	while (anfds [fd].head)	464	fd_kill (EV_A_ fd);
204	evio_stop (anfds [fd].head);	465	}
		466
		467	/* called on ENOMEM in select/poll to kill some fds and retry */
		468	static void
		469	fd_enomem (EV_P)
		470	{
		471	int fd;
		472
		473	for (fd = anfdmax; fd--; )
		474	if (anfds [fd].events)
		475	{
		476	fd_kill (EV_A_ fd);
		477	return;
		478	}
		479	}
		480
		481	/* usually called after fork if method needs to re-arm all fds from scratch */
		482	static void
		483	fd_rearm_all (EV_P)
		484	{
		485	int fd;
		486
		487	/* this should be highly optimised to not do anything but set a flag */
		488	for (fd = 0; fd < anfdmax; ++fd)
		489	if (anfds [fd].events)
		490	{
		491	anfds [fd].events = 0;
		492	fd_change (EV_A_ fd);
		493	}
205	}	494	}
206		495
207	/*****************************************************************************/	496	/*****************************************************************************/
208		497
209	static struct ev_timer **timers;
210	static int timermax, timercnt;
211
212	static struct ev_periodic **periodics;
213	static int periodicmax, periodiccnt;
214
215	static void	498	static void
216	upheap (WT *timers, int k)	499	upheap (WT *heap, int k)
217	{	500	{
218	WT w = timers [k];	501	WT w = heap [k];
219		502
220	while (k && timers [k >> 1]->at > w->at)	503	while (k && heap [k >> 1]->at > w->at)
221	{	504	{
222	timers [k] = timers [k >> 1];	505	heap [k] = heap [k >> 1];
223	timers [k]->active = k + 1;	506	((W)heap [k])->active = k + 1;
224	k >>= 1;	507	k >>= 1;
225	}	508	}
226		509
227	timers [k] = w;	510	heap [k] = w;
228	timers [k]->active = k + 1;	511	((W)heap [k])->active = k + 1;
229		512
230	}	513	}
231		514
232	static void	515	static void
233	downheap (WT *timers, int N, int k)	516	downheap (WT *heap, int N, int k)
234	{	517	{
235	WT w = timers [k];	518	WT w = heap [k];
236		519
237	while (k < (N >> 1))	520	while (k < (N >> 1))
238	{	521	{
239	int j = k << 1;	522	int j = k << 1;
240		523
241	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	524	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
242	++j;	525	++j;
243		526
244	if (w->at <= timers [j]->at)	527	if (w->at <= heap [j]->at)
245	break;	528	break;
246		529
247	timers [k] = timers [j];	530	heap [k] = heap [j];
248	timers [k]->active = k + 1;	531	((W)heap [k])->active = k + 1;
249	k = j;	532	k = j;
250	}	533	}
251		534
252	timers [k] = w;	535	heap [k] = w;
253	timers [k]->active = k + 1;	536	((W)heap [k])->active = k + 1;
		537	}
		538
		539	inline void
		540	adjustheap (WT *heap, int N, int k)
		541	{
		542	upheap (heap, k);
		543	downheap (heap, N, k);
254	}	544	}
255		545
256	/*****************************************************************************/	546	/*****************************************************************************/
257		547
258	typedef struct	548	typedef struct
259	{	549	{
260	struct ev_signal *head;	550	WL head;
261	sig_atomic_t gotsig;	551	sig_atomic_t volatile gotsig;
262	} ANSIG;	552	} ANSIG;
263		553
264	static ANSIG *signals;	554	static ANSIG *signals;
265	static int signalmax;	555	static int signalmax;
266		556
267	static int sigpipe [2];	557	static int sigpipe [2];
268	static sig_atomic_t gotsig;	558	static sig_atomic_t volatile gotsig;
269	static struct ev_io sigev;	559	static struct ev_io sigev;
270		560
271	static void	561	static void
272	signals_init (ANSIG *base, int count)	562	signals_init (ANSIG *base, int count)
273	{	563	{
274	while (count--)	564	while (count--)
275	{	565	{
276	base->head = 0;	566	base->head = 0;
277	base->gotsig = 0;	567	base->gotsig = 0;
		568
278	++base;	569	++base;
279	}	570	}
280	}	571	}
281		572
282	static void	573	static void
283	sighandler (int signum)	574	sighandler (int signum)
284	{	575	{
		576	#if WIN32
		577	signal (signum, sighandler);
		578	#endif
		579
285	signals [signum - 1].gotsig = 1;	580	signals [signum - 1].gotsig = 1;
286		581
287	if (!gotsig)	582	if (!gotsig)
288	{	583	{
		584	int old_errno = errno;
289	gotsig = 1;	585	gotsig = 1;
		586	#ifdef WIN32
		587	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		588	#else
290	write (sigpipe [1], &gotsig, 1);	589	write (sigpipe [1], &signum, 1);
		590	#endif
		591	errno = old_errno;
291	}	592	}
292	}	593	}
293		594
		595	void
		596	ev_feed_signal_event (EV_P_ int signum)
		597	{
		598	WL w;
		599
		600	#if EV_MULTIPLICITY
		601	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		602	#endif
		603
		604	--signum;
		605
		606	if (signum < 0 || signum >= signalmax)
		607	return;
		608
		609	signals [signum].gotsig = 0;
		610
		611	for (w = signals [signum].head; w; w = w->next)
		612	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		613	}
		614
294	static void	615	static void
295	sigcb (struct ev_io *iow, int revents)	616	sigcb (EV_P_ struct ev_io *iow, int revents)
296	{	617	{
297	struct ev_signal *w;
298	int sig;	618	int signum;
299		619
		620	#ifdef WIN32
		621	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		622	#else
		623	read (sigpipe [0], &revents, 1);
		624	#endif
300	gotsig = 0;	625	gotsig = 0;
301	read (sigpipe [0], &revents, 1);
302		626
303	for (sig = signalmax; sig--; )	627	for (signum = signalmax; signum--; )
304	if (signals [sig].gotsig)	628	if (signals [signum].gotsig)
305	{	629	ev_feed_signal_event (EV_A_ signum + 1);
306	signals [sig].gotsig = 0;
307
308	for (w = signals [sig].head; w; w = w->next)
309	event ((W)w, EV_SIGNAL);
310	}
311	}	630	}
312		631
313	static void	632	static void
314	siginit (void)	633	siginit (EV_P)
315	{	634	{
		635	#ifndef WIN32
316	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	636	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
317	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	637	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
318		638
319	/* rather than sort out wether we really need nb, set it */	639	/* rather than sort out wether we really need nb, set it */
320	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	640	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
321	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	641	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		642	#endif
322		643
323	evio_set (&sigev, sigpipe [0], EV_READ);	644	ev_io_set (&sigev, sigpipe [0], EV_READ);
324	evio_start (&sigev);	645	ev_io_start (EV_A_ &sigev);
		646	ev_unref (EV_A); /* child watcher should not keep loop alive */
325	}	647	}
326		648
327	/*****************************************************************************/	649	/*****************************************************************************/
328		650
329	static struct ev_idle **idles;
330	static int idlemax, idlecnt;
331
332	static struct ev_prepare **prepares;
333	static int preparemax, preparecnt;
334
335	static struct ev_check **checks;
336	static int checkmax, checkcnt;
337
338	/*****************************************************************************/
339
340	static struct ev_child *childs [PID_HASHSIZE];	651	static struct ev_child *childs [PID_HASHSIZE];
		652
		653	#ifndef WIN32
		654
341	static struct ev_signal childev;	655	static struct ev_signal childev;
342		656
343	#ifndef WCONTINUED	657	#ifndef WCONTINUED
344	# define WCONTINUED 0	658	# define WCONTINUED 0
345	#endif	659	#endif
346		660
347	static void	661	static void
348	childcb (struct ev_signal *sw, int revents)	662	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
349	{	663	{
350	struct ev_child *w;	664	struct ev_child *w;
		665
		666	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		667	if (w->pid == pid || !w->pid)
		668	{
		669	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		670	w->rpid = pid;
		671	w->rstatus = status;
		672	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		673	}
		674	}
		675
		676	static void
		677	childcb (EV_P_ struct ev_signal *sw, int revents)
		678	{
351	int pid, status;	679	int pid, status;
352		680
353	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	681	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
354	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	682	{
355	if (w->pid == pid || w->pid == -1)	683	/* make sure we are called again until all childs have been reaped */
		684	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		685
		686	child_reap (EV_A_ sw, pid, pid, status);
		687	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		688	}
		689	}
		690
		691	#endif
		692
		693	/*****************************************************************************/
		694
		695	#if EV_USE_KQUEUE
		696	# include "ev_kqueue.c"
		697	#endif
		698	#if EV_USE_EPOLL
		699	# include "ev_epoll.c"
		700	#endif
		701	#if EV_USE_POLL
		702	# include "ev_poll.c"
		703	#endif
		704	#if EV_USE_SELECT
		705	# include "ev_select.c"
		706	#endif
		707
		708	int
		709	ev_version_major (void)
		710	{
		711	return EV_VERSION_MAJOR;
		712	}
		713
		714	int
		715	ev_version_minor (void)
		716	{
		717	return EV_VERSION_MINOR;
		718	}
		719
		720	/* return true if we are running with elevated privileges and should ignore env variables */
		721	static int
		722	enable_secure (void)
		723	{
		724	#ifdef WIN32
		725	return 0;
		726	#else
		727	return getuid () != geteuid ()
		728	|| getgid () != getegid ();
		729	#endif
		730	}
		731
		732	int
		733	ev_method (EV_P)
		734	{
		735	return method;
		736	}
		737
		738	static void
		739	loop_init (EV_P_ int methods)
		740	{
		741	if (!method)
		742	{
		743	#if EV_USE_MONOTONIC
		744	{
		745	struct timespec ts;
		746	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		747	have_monotonic = 1;
		748	}
		749	#endif
		750
		751	ev_rt_now = ev_time ();
		752	mn_now = get_clock ();
		753	now_floor = mn_now;
		754	rtmn_diff = ev_rt_now - mn_now;
		755
		756	if (methods == EVMETHOD_AUTO)
		757	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		758	methods = atoi (getenv ("LIBEV_METHODS"));
		759	else
		760	methods = EVMETHOD_ANY;
		761
		762	method = 0;
		763	#if EV_USE_WIN32
		764	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		765	#endif
		766	#if EV_USE_KQUEUE
		767	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		768	#endif
		769	#if EV_USE_EPOLL
		770	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		771	#endif
		772	#if EV_USE_POLL
		773	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		774	#endif
		775	#if EV_USE_SELECT
		776	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		777	#endif
		778
		779	ev_init (&sigev, sigcb);
		780	ev_set_priority (&sigev, EV_MAXPRI);
		781	}
		782	}
		783
		784	void
		785	loop_destroy (EV_P)
		786	{
		787	int i;
		788
		789	#if EV_USE_WIN32
		790	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		791	#endif
		792	#if EV_USE_KQUEUE
		793	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		794	#endif
		795	#if EV_USE_EPOLL
		796	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		797	#endif
		798	#if EV_USE_POLL
		799	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		800	#endif
		801	#if EV_USE_SELECT
		802	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		803	#endif
		804
		805	for (i = NUMPRI; i--; )
		806	array_free (pending, [i]);
		807
		808	/* have to use the microsoft-never-gets-it-right macro */
		809	array_free_microshit (fdchange);
		810	array_free_microshit (timer);
		811	#if EV_PERIODICS
		812	array_free_microshit (periodic);
		813	#endif
		814	array_free_microshit (idle);
		815	array_free_microshit (prepare);
		816	array_free_microshit (check);
		817
		818	method = 0;
		819	}
		820
		821	static void
		822	loop_fork (EV_P)
		823	{
		824	#if EV_USE_EPOLL
		825	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		826	#endif
		827	#if EV_USE_KQUEUE
		828	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		829	#endif
		830
		831	if (ev_is_active (&sigev))
		832	{
		833	/* default loop */
		834
		835	ev_ref (EV_A);
		836	ev_io_stop (EV_A_ &sigev);
		837	close (sigpipe [0]);
		838	close (sigpipe [1]);
		839
		840	while (pipe (sigpipe))
		841	syserr ("(libev) error creating pipe");
		842
		843	siginit (EV_A);
		844	}
		845
		846	postfork = 0;
		847	}
		848
		849	#if EV_MULTIPLICITY
		850	struct ev_loop *
		851	ev_loop_new (int methods)
		852	{
		853	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		854
		855	memset (loop, 0, sizeof (struct ev_loop));
		856
		857	loop_init (EV_A_ methods);
		858
		859	if (ev_method (EV_A))
		860	return loop;
		861
		862	return 0;
		863	}
		864
		865	void
		866	ev_loop_destroy (EV_P)
		867	{
		868	loop_destroy (EV_A);
		869	ev_free (loop);
		870	}
		871
		872	void
		873	ev_loop_fork (EV_P)
		874	{
		875	postfork = 1;
		876	}
		877
		878	#endif
		879
		880	#if EV_MULTIPLICITY
		881	struct ev_loop *
		882	#else
		883	int
		884	#endif
		885	ev_default_loop (int methods)
		886	{
		887	if (sigpipe [0] == sigpipe [1])
		888	if (pipe (sigpipe))
		889	return 0;
		890
		891	if (!default_loop)
		892	{
		893	#if EV_MULTIPLICITY
		894	struct ev_loop *loop = default_loop = &default_loop_struct;
		895	#else
		896	default_loop = 1;
		897	#endif
		898
		899	loop_init (EV_A_ methods);
		900
		901	if (ev_method (EV_A))
356	{	902	{
357	w->status = status;	903	siginit (EV_A);
358	event ((W)w, EV_CHILD);	904
		905	#ifndef WIN32
		906	ev_signal_init (&childev, childcb, SIGCHLD);
		907	ev_set_priority (&childev, EV_MAXPRI);
		908	ev_signal_start (EV_A_ &childev);
		909	ev_unref (EV_A); /* child watcher should not keep loop alive */
		910	#endif
359	}	911	}
		912	else
		913	default_loop = 0;
		914	}
		915
		916	return default_loop;
		917	}
		918
		919	void
		920	ev_default_destroy (void)
		921	{
		922	#if EV_MULTIPLICITY
		923	struct ev_loop *loop = default_loop;
		924	#endif
		925
		926	#ifndef WIN32
		927	ev_ref (EV_A); /* child watcher */
		928	ev_signal_stop (EV_A_ &childev);
		929	#endif
		930
		931	ev_ref (EV_A); /* signal watcher */
		932	ev_io_stop (EV_A_ &sigev);
		933
		934	close (sigpipe [0]); sigpipe [0] = 0;
		935	close (sigpipe [1]); sigpipe [1] = 0;
		936
		937	loop_destroy (EV_A);
		938	}
		939
		940	void
		941	ev_default_fork (void)
		942	{
		943	#if EV_MULTIPLICITY
		944	struct ev_loop *loop = default_loop;
		945	#endif
		946
		947	if (method)
		948	postfork = 1;
360	}	949	}
361		950
362	/*****************************************************************************/	951	/*****************************************************************************/
363		952
364	#if HAVE_EPOLL	953	static int
365	# include "ev_epoll.c"	954	any_pending (EV_P)
366	#endif
367	#if HAVE_SELECT
368	# include "ev_select.c"
369	#endif
370
371	int ev_init (int flags)
372	{	955	{
373	#if HAVE_MONOTONIC	956	int pri;
374	{
375	struct timespec ts;
376	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
377	have_monotonic = 1;
378	}
379	#endif
380		957
381	ev_now = ev_time ();	958	for (pri = NUMPRI; pri--; )
382	now = get_clock ();	959	if (pendingcnt [pri])
383	diff = ev_now - now;	960	return 1;
384		961
385	if (pipe (sigpipe))
386	return 0;	962	return 0;
387
388	ev_method = EVMETHOD_NONE;
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
391	#endif
392	#if HAVE_SELECT
393	if (ev_method == EVMETHOD_NONE) select_init (flags);
394	#endif
395
396	if (ev_method)
397	{
398	evw_init (&sigev, sigcb);
399	siginit ();
400
401	evsignal_init (&childev, childcb, SIGCHLD);
402	evsignal_start (&childev);
403	}
404
405	return ev_method;
406	}	963	}
407		964
408	/*****************************************************************************/
409
410	void ev_prefork (void)
411	{
412	/* nop */
413	}
414
415	void ev_postfork_parent (void)
416	{
417	/* nop */
418	}
419
420	void ev_postfork_child (void)
421	{
422	#if HAVE_EPOLL
423	if (ev_method == EVMETHOD_EPOLL)
424	epoll_postfork_child ();
425	#endif
426
427	evio_stop (&sigev);
428	close (sigpipe [0]);
429	close (sigpipe [1]);
430	pipe (sigpipe);
431	siginit ();
432	}
433
434	/*****************************************************************************/
435
436	static void	965	static void
437	fd_reify (void)	966	call_pending (EV_P)
438	{	967	{
439	int i;	968	int pri;
440		969
441	for (i = 0; i < fdchangecnt; ++i)	970	for (pri = NUMPRI; pri--; )
442	{	971	while (pendingcnt [pri])
443	int fd = fdchanges [i];
444	ANFD *anfd = anfds + fd;
445	struct ev_io *w;
446
447	int wev = 0;
448
449	for (w = anfd->head; w; w = w->next)
450	wev |= w->events;
451
452	if (anfd->wev != wev)
453	{	972	{
454	method_modify (fd, anfd->wev, wev);
455	anfd->wev = wev;
456	}
457	}
458
459	fdchangecnt = 0;
460	}
461
462	static void
463	call_pending ()
464	{
465	while (pendingcnt)
466	{
467	ANPENDING *p = pendings + --pendingcnt;	973	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
468		974
469	if (p->w)	975	if (p->w)
470	{	976	{
471	p->w->pending = 0;	977	p->w->pending = 0;
472	p->w->cb (p->w, p->events);	978	EV_CB_INVOKE (p->w, p->events);
473	}	979	}
474	}	980	}
475	}	981	}
476		982
477	static void	983	static void
478	timers_reify ()	984	timers_reify (EV_P)
479	{	985	{
480	while (timercnt && timers [0]->at <= now)	986	while (timercnt && ((WT)timers [0])->at <= mn_now)
481	{	987	{
482	struct ev_timer *w = timers [0];	988	struct ev_timer *w = timers [0];
483		989
484	event ((W)w, EV_TIMEOUT);	990	assert (("inactive timer on timer heap detected", ev_is_active (w)));
485		991
486	/* first reschedule or stop timer */	992	/* first reschedule or stop timer */
487	if (w->repeat)	993	if (w->repeat)
488	{	994	{
		995	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		996
489	w->at = now + w->repeat;	997	((WT)w)->at += w->repeat;
490	assert (("timer timeout in the past, negative repeat?", w->at > now));	998	if (((WT)w)->at < mn_now)
		999	((WT)w)->at = mn_now;
		1000
491	downheap ((WT *)timers, timercnt, 0);	1001	downheap ((WT *)timers, timercnt, 0);
492	}	1002	}
493	else	1003	else
494	evtimer_stop (w); /* nonrepeating: stop timer */	1004	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
495	}
496	}
497		1005
		1006	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1007	}
		1008	}
		1009
		1010	#if EV_PERIODICS
498	static void	1011	static void
499	periodics_reify ()	1012	periodics_reify (EV_P)
500	{	1013	{
501	while (periodiccnt && periodics [0]->at <= ev_now)	1014	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
502	{	1015	{
503	struct ev_periodic *w = periodics [0];	1016	struct ev_periodic *w = periodics [0];
504		1017
		1018	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1019
505	/* first reschedule or stop timer */	1020	/* first reschedule or stop timer */
506	if (w->interval)	1021	if (w->reschedule_cb)
507	{	1022	{
		1023	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1024
		1025	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1026	downheap ((WT *)periodics, periodiccnt, 0);
		1027	}
		1028	else if (w->interval)
		1029	{
508	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1030	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
509	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1031	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
510	downheap ((WT *)periodics, periodiccnt, 0);	1032	downheap ((WT *)periodics, periodiccnt, 0);
511	}	1033	}
512	else	1034	else
513	evperiodic_stop (w); /* nonrepeating: stop timer */	1035	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
514		1036
515	event ((W)w, EV_TIMEOUT);	1037	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
516	}	1038	}
517	}	1039	}
518		1040
519	static void	1041	static void
520	periodics_reschedule (ev_tstamp diff)	1042	periodics_reschedule (EV_P)
521	{	1043	{
522	int i;	1044	int i;
523		1045
524	/* adjust periodics after time jump */	1046	/* adjust periodics after time jump */
525	for (i = 0; i < periodiccnt; ++i)	1047	for (i = 0; i < periodiccnt; ++i)
526	{	1048	{
527	struct ev_periodic *w = periodics [i];	1049	struct ev_periodic *w = periodics [i];
528		1050
		1051	if (w->reschedule_cb)
		1052	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
529	if (w->interval)	1053	else if (w->interval)
		1054	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1055	}
		1056
		1057	/* now rebuild the heap */
		1058	for (i = periodiccnt >> 1; i--; )
		1059	downheap ((WT *)periodics, periodiccnt, i);
		1060	}
		1061	#endif
		1062
		1063	inline int
		1064	time_update_monotonic (EV_P)
		1065	{
		1066	mn_now = get_clock ();
		1067
		1068	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1069	{
		1070	ev_rt_now = rtmn_diff + mn_now;
		1071	return 0;
		1072	}
		1073	else
		1074	{
		1075	now_floor = mn_now;
		1076	ev_rt_now = ev_time ();
		1077	return 1;
		1078	}
		1079	}
		1080
		1081	static void
		1082	time_update (EV_P)
		1083	{
		1084	int i;
		1085
		1086	#if EV_USE_MONOTONIC
		1087	if (expect_true (have_monotonic))
		1088	{
		1089	if (time_update_monotonic (EV_A))
530	{	1090	{
531	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1091	ev_tstamp odiff = rtmn_diff;
532		1092
533	if (fabs (diff) >= 1e-4)	1093	for (i = 4; --i; ) /* loop a few times, before making important decisions */
534	{	1094	{
535	evperiodic_stop (w);	1095	rtmn_diff = ev_rt_now - mn_now;
536	evperiodic_start (w);
537		1096
538	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1097	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1098	return; /* all is well */
		1099
		1100	ev_rt_now = ev_time ();
		1101	mn_now = get_clock ();
		1102	now_floor = mn_now;
539	}	1103	}
		1104
		1105	# if EV_PERIODICS
		1106	periodics_reschedule (EV_A);
		1107	# endif
		1108	/* no timer adjustment, as the monotonic clock doesn't jump */
		1109	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
540	}	1110	}
541	}	1111	}
542	}	1112	else
543		1113	#endif
544	static void	1114	{
545	time_update ()
546	{
547	int i;
548
549	ev_now = ev_time ();	1115	ev_rt_now = ev_time ();
550		1116
551	if (have_monotonic)	1117	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
552	{
553	ev_tstamp odiff = diff;
554
555	for (i = 4; --i; ) /* loop a few times, before making important decisions */
556	{	1118	{
557	now = get_clock ();	1119	#if EV_PERIODICS
558	diff = ev_now - now;
559
560	if (fabs (odiff - diff) < MIN_TIMEJUMP)
561	return; /* all is well */
562
563	ev_now = ev_time ();
564	}
565
566	periodics_reschedule (diff - odiff);
567	/* no timer adjustment, as the monotonic clock doesn't jump */
568	}
569	else
570	{
571	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
572	{
573	periodics_reschedule (ev_now - now);	1120	periodics_reschedule (EV_A);
		1121	#endif
574		1122
575	/* adjust timers. this is easy, as the offset is the same for all */	1123	/* adjust timers. this is easy, as the offset is the same for all */
576	for (i = 0; i < timercnt; ++i)	1124	for (i = 0; i < timercnt; ++i)
577	timers [i]->at += diff;	1125	((WT)timers [i])->at += ev_rt_now - mn_now;
578	}	1126	}
579		1127
580	now = ev_now;	1128	mn_now = ev_rt_now;
581	}	1129	}
582	}	1130	}
583		1131
584	int ev_loop_done;	1132	void
		1133	ev_ref (EV_P)
		1134	{
		1135	++activecnt;
		1136	}
585		1137
		1138	void
		1139	ev_unref (EV_P)
		1140	{
		1141	--activecnt;
		1142	}
		1143
		1144	static int loop_done;
		1145
		1146	void
586	void ev_loop (int flags)	1147	ev_loop (EV_P_ int flags)
587	{	1148	{
588	double block;	1149	double block;
589	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1150	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
590		1151
591	do	1152	do
592	{	1153	{
593	/* queue check watchers (and execute them) */	1154	/* queue check watchers (and execute them) */
594	if (preparecnt)	1155	if (expect_false (preparecnt))
595	{	1156	{
596	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1157	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
597	call_pending ();	1158	call_pending (EV_A);
598	}	1159	}
599		1160
		1161	/* we might have forked, so reify kernel state if necessary */
		1162	if (expect_false (postfork))
		1163	loop_fork (EV_A);
		1164
600	/* update fd-related kernel structures */	1165	/* update fd-related kernel structures */
601	fd_reify ();	1166	fd_reify (EV_A);
602		1167
603	/* calculate blocking time */	1168	/* calculate blocking time */
604		1169
605	/* we only need this for !monotonic clockor timers, but as we basically	1170	/* we only need this for !monotonic clock or timers, but as we basically
606	always have timers, we just calculate it always */	1171	always have timers, we just calculate it always */
		1172	#if EV_USE_MONOTONIC
		1173	if (expect_true (have_monotonic))
		1174	time_update_monotonic (EV_A);
		1175	else
		1176	#endif
		1177	{
607	ev_now = ev_time ();	1178	ev_rt_now = ev_time ();
		1179	mn_now = ev_rt_now;
		1180	}
608		1181
609	if (flags & EVLOOP_NONBLOCK || idlecnt)	1182	if (flags & EVLOOP_NONBLOCK || idlecnt)
610	block = 0.;	1183	block = 0.;
611	else	1184	else
612	{	1185	{
613	block = MAX_BLOCKTIME;	1186	block = MAX_BLOCKTIME;
614		1187
615	if (timercnt)	1188	if (timercnt)
616	{	1189	{
617	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1190	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
618	if (block > to) block = to;	1191	if (block > to) block = to;
619	}	1192	}
620		1193
		1194	#if EV_PERIODICS
621	if (periodiccnt)	1195	if (periodiccnt)
622	{	1196	{
623	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1197	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
624	if (block > to) block = to;	1198	if (block > to) block = to;
625	}	1199	}
		1200	#endif
626		1201
627	if (block < 0.) block = 0.;	1202	if (block < 0.) block = 0.;
628	}	1203	}
629		1204
630	method_poll (block);	1205	method_poll (EV_A_ block);
631		1206
632	/* update ev_now, do magic */	1207	/* update ev_rt_now, do magic */
633	time_update ();	1208	time_update (EV_A);
634		1209
635	/* queue pending timers and reschedule them */	1210	/* queue pending timers and reschedule them */
636	timers_reify (); /* relative timers called last */	1211	timers_reify (EV_A); /* relative timers called last */
		1212	#if EV_PERIODICS
637	periodics_reify (); /* absolute timers called first */	1213	periodics_reify (EV_A); /* absolute timers called first */
		1214	#endif
638		1215
639	/* queue idle watchers unless io or timers are pending */	1216	/* queue idle watchers unless io or timers are pending */
640	if (!pendingcnt)	1217	if (idlecnt && !any_pending (EV_A))
641	queue_events ((W *)idles, idlecnt, EV_IDLE);	1218	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
642		1219
643	/* queue check watchers, to be executed first */	1220	/* queue check watchers, to be executed first */
644	if (checkcnt)	1221	if (checkcnt)
645	queue_events ((W *)checks, checkcnt, EV_CHECK);	1222	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
646		1223
647	call_pending ();	1224	call_pending (EV_A);
648	}	1225	}
649	while (!ev_loop_done);	1226	while (activecnt && !loop_done);
650		1227
651	if (ev_loop_done != 2)	1228	if (loop_done != 2)
652	ev_loop_done = 0;	1229	loop_done = 0;
		1230	}
		1231
		1232	void
		1233	ev_unloop (EV_P_ int how)
		1234	{
		1235	loop_done = how;
653	}	1236	}
654		1237
655	/*****************************************************************************/	1238	/*****************************************************************************/
656		1239
657	static void	1240	inline void
658	wlist_add (WL *head, WL elem)	1241	wlist_add (WL *head, WL elem)
659	{	1242	{
660	elem->next = *head;	1243	elem->next = *head;
661	*head = elem;	1244	*head = elem;
662	}	1245	}
663		1246
664	static void	1247	inline void
665	wlist_del (WL *head, WL elem)	1248	wlist_del (WL *head, WL elem)
666	{	1249	{
667	while (*head)	1250	while (*head)
668	{	1251	{
669	if (*head == elem)	1252	if (*head == elem)
…		…
674		1257
675	head = &(*head)->next;	1258	head = &(*head)->next;
676	}	1259	}
677	}	1260	}
678		1261
679	static void	1262	inline void
680	ev_clear (W w)	1263	ev_clear_pending (EV_P_ W w)
681	{	1264	{
682	if (w->pending)	1265	if (w->pending)
683	{	1266	{
684	pendings [w->pending - 1].w = 0;	1267	pendings [ABSPRI (w)][w->pending - 1].w = 0;
685	w->pending = 0;	1268	w->pending = 0;
686	}	1269	}
687	}	1270	}
688		1271
689	static void	1272	inline void
690	ev_start (W w, int active)	1273	ev_start (EV_P_ W w, int active)
691	{	1274	{
		1275	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1276	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1277
692	w->active = active;	1278	w->active = active;
		1279	ev_ref (EV_A);
693	}	1280	}
694		1281
695	static void	1282	inline void
696	ev_stop (W w)	1283	ev_stop (EV_P_ W w)
697	{	1284	{
		1285	ev_unref (EV_A);
698	w->active = 0;	1286	w->active = 0;
699	}	1287	}
700		1288
701	/*****************************************************************************/	1289	/*****************************************************************************/
702		1290
703	void	1291	void
704	evio_start (struct ev_io *w)	1292	ev_io_start (EV_P_ struct ev_io *w)
705	{	1293	{
		1294	int fd = w->fd;
		1295
706	if (ev_is_active (w))	1296	if (ev_is_active (w))
707	return;	1297	return;
708		1298
709	int fd = w->fd;	1299	assert (("ev_io_start called with negative fd", fd >= 0));
710		1300
711	ev_start ((W)w, 1);	1301	ev_start (EV_A_ (W)w, 1);
712	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1302	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
713	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1303	wlist_add ((WL *)&anfds[fd].head, (WL)w);
714		1304
715	++fdchangecnt;	1305	fd_change (EV_A_ fd);
716	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
717	fdchanges [fdchangecnt - 1] = fd;
718	}	1306	}
719		1307
720	void	1308	void
721	evio_stop (struct ev_io *w)	1309	ev_io_stop (EV_P_ struct ev_io *w)
722	{	1310	{
723	ev_clear ((W)w);	1311	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1312	if (!ev_is_active (w))
725	return;	1313	return;
726		1314
		1315	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1316
727	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1317	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
728	ev_stop ((W)w);	1318	ev_stop (EV_A_ (W)w);
729		1319
730	++fdchangecnt;	1320	fd_change (EV_A_ w->fd);
731	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
732	fdchanges [fdchangecnt - 1] = w->fd;
733	}	1321	}
734		1322
735	void	1323	void
736	evtimer_start (struct ev_timer *w)	1324	ev_timer_start (EV_P_ struct ev_timer *w)
737	{	1325	{
738	if (ev_is_active (w))	1326	if (ev_is_active (w))
739	return;	1327	return;
740		1328
741	w->at += now;	1329	((WT)w)->at += mn_now;
742		1330
743	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1331	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
744		1332
745	ev_start ((W)w, ++timercnt);	1333	ev_start (EV_A_ (W)w, ++timercnt);
746	array_needsize (timers, timermax, timercnt, );	1334	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
747	timers [timercnt - 1] = w;	1335	timers [timercnt - 1] = w;
748	upheap ((WT *)timers, timercnt - 1);	1336	upheap ((WT *)timers, timercnt - 1);
749	}
750		1337
		1338	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1339	}
		1340
751	void	1341	void
752	evtimer_stop (struct ev_timer *w)	1342	ev_timer_stop (EV_P_ struct ev_timer *w)
753	{	1343	{
754	ev_clear ((W)w);	1344	ev_clear_pending (EV_A_ (W)w);
755	if (!ev_is_active (w))	1345	if (!ev_is_active (w))
756	return;	1346	return;
757		1347
		1348	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1349
758	if (w->active < timercnt--)	1350	if (((W)w)->active < timercnt--)
759	{	1351	{
760	timers [w->active - 1] = timers [timercnt];	1352	timers [((W)w)->active - 1] = timers [timercnt];
761	downheap ((WT *)timers, timercnt, w->active - 1);	1353	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
762	}	1354	}
763		1355
764	w->at = w->repeat;	1356	((WT)w)->at -= mn_now;
765		1357
766	ev_stop ((W)w);	1358	ev_stop (EV_A_ (W)w);
767	}	1359	}
768		1360
769	void	1361	void
770	evtimer_again (struct ev_timer *w)	1362	ev_timer_again (EV_P_ struct ev_timer *w)
771	{	1363	{
772	if (ev_is_active (w))	1364	if (ev_is_active (w))
773	{	1365	{
774	if (w->repeat)	1366	if (w->repeat)
775	{	1367	{
776	w->at = now + w->repeat;	1368	((WT)w)->at = mn_now + w->repeat;
777	downheap ((WT *)timers, timercnt, w->active - 1);	1369	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
778	}	1370	}
779	else	1371	else
780	evtimer_stop (w);	1372	ev_timer_stop (EV_A_ w);
781	}	1373	}
782	else if (w->repeat)	1374	else if (w->repeat)
783	evtimer_start (w);	1375	ev_timer_start (EV_A_ w);
784	}	1376	}
785		1377
		1378	#if EV_PERIODICS
786	void	1379	void
787	evperiodic_start (struct ev_periodic *w)	1380	ev_periodic_start (EV_P_ struct ev_periodic *w)
788	{	1381	{
789	if (ev_is_active (w))	1382	if (ev_is_active (w))
790	return;	1383	return;
791		1384
792	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1385	if (w->reschedule_cb)
793		1386	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1387	else if (w->interval)
		1388	{
		1389	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
794	/* this formula differs from the one in periodic_reify because we do not always round up */	1390	/* this formula differs from the one in periodic_reify because we do not always round up */
795	if (w->interval)
796	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1391	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1392	}
797		1393
798	ev_start ((W)w, ++periodiccnt);	1394	ev_start (EV_A_ (W)w, ++periodiccnt);
799	array_needsize (periodics, periodicmax, periodiccnt, );	1395	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
800	periodics [periodiccnt - 1] = w;	1396	periodics [periodiccnt - 1] = w;
801	upheap ((WT *)periodics, periodiccnt - 1);	1397	upheap ((WT *)periodics, periodiccnt - 1);
802	}
803		1398
		1399	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1400	}
		1401
804	void	1402	void
805	evperiodic_stop (struct ev_periodic *w)	1403	ev_periodic_stop (EV_P_ struct ev_periodic *w)
806	{	1404	{
807	ev_clear ((W)w);	1405	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1406	if (!ev_is_active (w))
809	return;	1407	return;
810		1408
		1409	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1410
811	if (w->active < periodiccnt--)	1411	if (((W)w)->active < periodiccnt--)
812	{	1412	{
813	periodics [w->active - 1] = periodics [periodiccnt];	1413	periodics [((W)w)->active - 1] = periodics [periodiccnt];
814	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1414	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
815	}	1415	}
816		1416
817	ev_stop ((W)w);	1417	ev_stop (EV_A_ (W)w);
818	}	1418	}
819		1419
820	void	1420	void
821	evsignal_start (struct ev_signal *w)	1421	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1422	{
		1423	/* TODO: use adjustheap and recalculation */
		1424	ev_periodic_stop (EV_A_ w);
		1425	ev_periodic_start (EV_A_ w);
		1426	}
		1427	#endif
		1428
		1429	void
		1430	ev_idle_start (EV_P_ struct ev_idle *w)
822	{	1431	{
823	if (ev_is_active (w))	1432	if (ev_is_active (w))
824	return;	1433	return;
825		1434
		1435	ev_start (EV_A_ (W)w, ++idlecnt);
		1436	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1437	idles [idlecnt - 1] = w;
		1438	}
		1439
		1440	void
		1441	ev_idle_stop (EV_P_ struct ev_idle *w)
		1442	{
		1443	ev_clear_pending (EV_A_ (W)w);
		1444	if (!ev_is_active (w))
		1445	return;
		1446
		1447	idles [((W)w)->active - 1] = idles [--idlecnt];
		1448	ev_stop (EV_A_ (W)w);
		1449	}
		1450
		1451	void
		1452	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1453	{
		1454	if (ev_is_active (w))
		1455	return;
		1456
		1457	ev_start (EV_A_ (W)w, ++preparecnt);
		1458	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1459	prepares [preparecnt - 1] = w;
		1460	}
		1461
		1462	void
		1463	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1464	{
		1465	ev_clear_pending (EV_A_ (W)w);
		1466	if (!ev_is_active (w))
		1467	return;
		1468
		1469	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1470	ev_stop (EV_A_ (W)w);
		1471	}
		1472
		1473	void
		1474	ev_check_start (EV_P_ struct ev_check *w)
		1475	{
		1476	if (ev_is_active (w))
		1477	return;
		1478
		1479	ev_start (EV_A_ (W)w, ++checkcnt);
		1480	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1481	checks [checkcnt - 1] = w;
		1482	}
		1483
		1484	void
		1485	ev_check_stop (EV_P_ struct ev_check *w)
		1486	{
		1487	ev_clear_pending (EV_A_ (W)w);
		1488	if (!ev_is_active (w))
		1489	return;
		1490
		1491	checks [((W)w)->active - 1] = checks [--checkcnt];
		1492	ev_stop (EV_A_ (W)w);
		1493	}
		1494
		1495	#ifndef SA_RESTART
		1496	# define SA_RESTART 0
		1497	#endif
		1498
		1499	void
		1500	ev_signal_start (EV_P_ struct ev_signal *w)
		1501	{
		1502	#if EV_MULTIPLICITY
		1503	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1504	#endif
		1505	if (ev_is_active (w))
		1506	return;
		1507
		1508	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1509
826	ev_start ((W)w, 1);	1510	ev_start (EV_A_ (W)w, 1);
827	array_needsize (signals, signalmax, w->signum, signals_init);	1511	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
828	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1512	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
829		1513
830	if (!w->next)	1514	if (!((WL)w)->next)
831	{	1515	{
		1516	#if WIN32
		1517	signal (w->signum, sighandler);
		1518	#else
832	struct sigaction sa;	1519	struct sigaction sa;
833	sa.sa_handler = sighandler;	1520	sa.sa_handler = sighandler;
834	sigfillset (&sa.sa_mask);	1521	sigfillset (&sa.sa_mask);
835	sa.sa_flags = 0;	1522	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
836	sigaction (w->signum, &sa, 0);	1523	sigaction (w->signum, &sa, 0);
		1524	#endif
837	}	1525	}
838	}	1526	}
839		1527
840	void	1528	void
841	evsignal_stop (struct ev_signal *w)	1529	ev_signal_stop (EV_P_ struct ev_signal *w)
842	{	1530	{
843	ev_clear ((W)w);	1531	ev_clear_pending (EV_A_ (W)w);
844	if (!ev_is_active (w))	1532	if (!ev_is_active (w))
845	return;	1533	return;
846		1534
847	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1535	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
848	ev_stop ((W)w);	1536	ev_stop (EV_A_ (W)w);
849		1537
850	if (!signals [w->signum - 1].head)	1538	if (!signals [w->signum - 1].head)
851	signal (w->signum, SIG_DFL);	1539	signal (w->signum, SIG_DFL);
852	}	1540	}
853		1541
854	void evidle_start (struct ev_idle *w)	1542	void
		1543	ev_child_start (EV_P_ struct ev_child *w)
855	{	1544	{
		1545	#if EV_MULTIPLICITY
		1546	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1547	#endif
856	if (ev_is_active (w))	1548	if (ev_is_active (w))
857	return;	1549	return;
858		1550
859	ev_start ((W)w, ++idlecnt);
860	array_needsize (idles, idlemax, idlecnt, );
861	idles [idlecnt - 1] = w;
862	}
863
864	void evidle_stop (struct ev_idle *w)
865	{
866	ev_clear ((W)w);
867	if (ev_is_active (w))
868	return;
869
870	idles [w->active - 1] = idles [--idlecnt];
871	ev_stop ((W)w);
872	}
873
874	void evprepare_start (struct ev_prepare *w)
875	{
876	if (ev_is_active (w))
877	return;
878
879	ev_start ((W)w, ++preparecnt);
880	array_needsize (prepares, preparemax, preparecnt, );
881	prepares [preparecnt - 1] = w;
882	}
883
884	void evprepare_stop (struct ev_prepare *w)
885	{
886	ev_clear ((W)w);
887	if (ev_is_active (w))
888	return;
889
890	prepares [w->active - 1] = prepares [--preparecnt];
891	ev_stop ((W)w);
892	}
893
894	void evcheck_start (struct ev_check *w)
895	{
896	if (ev_is_active (w))
897	return;
898
899	ev_start ((W)w, ++checkcnt);
900	array_needsize (checks, checkmax, checkcnt, );
901	checks [checkcnt - 1] = w;
902	}
903
904	void evcheck_stop (struct ev_check *w)
905	{
906	ev_clear ((W)w);
907	if (ev_is_active (w))
908	return;
909
910	checks [w->active - 1] = checks [--checkcnt];
911	ev_stop ((W)w);
912	}
913
914	void evchild_start (struct ev_child *w)
915	{
916	if (ev_is_active (w))
917	return;
918
919	ev_start ((W)w, 1);	1551	ev_start (EV_A_ (W)w, 1);
920	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1552	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
921	}	1553	}
922		1554
		1555	void
923	void evchild_stop (struct ev_child *w)	1556	ev_child_stop (EV_P_ struct ev_child *w)
924	{	1557	{
925	ev_clear ((W)w);	1558	ev_clear_pending (EV_A_ (W)w);
926	if (ev_is_active (w))	1559	if (!ev_is_active (w))
927	return;	1560	return;
928		1561
929	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1562	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	ev_stop ((W)w);	1563	ev_stop (EV_A_ (W)w);
931	}	1564	}
932		1565
933	/*****************************************************************************/	1566	/*****************************************************************************/
934		1567
935	struct ev_once	1568	struct ev_once
…		…
939	void (*cb)(int revents, void *arg);	1572	void (*cb)(int revents, void *arg);
940	void *arg;	1573	void *arg;
941	};	1574	};
942		1575
943	static void	1576	static void
944	once_cb (struct ev_once *once, int revents)	1577	once_cb (EV_P_ struct ev_once *once, int revents)
945	{	1578	{
946	void (*cb)(int revents, void *arg) = once->cb;	1579	void (*cb)(int revents, void *arg) = once->cb;
947	void *arg = once->arg;	1580	void *arg = once->arg;
948		1581
949	evio_stop (&once->io);	1582	ev_io_stop (EV_A_ &once->io);
950	evtimer_stop (&once->to);	1583	ev_timer_stop (EV_A_ &once->to);
951	free (once);	1584	ev_free (once);
952		1585
953	cb (revents, arg);	1586	cb (revents, arg);
954	}	1587	}
955		1588
956	static void	1589	static void
957	once_cb_io (struct ev_io *w, int revents)	1590	once_cb_io (EV_P_ struct ev_io *w, int revents)
958	{	1591	{
959	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1592	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
960	}	1593	}
961		1594
962	static void	1595	static void
963	once_cb_to (struct ev_timer *w, int revents)	1596	once_cb_to (EV_P_ struct ev_timer *w, int revents)
964	{	1597	{
965	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1598	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
966	}	1599	}
967		1600
968	void	1601	void
969	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1602	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
970	{	1603	{
971	struct ev_once *once = malloc (sizeof (struct ev_once));	1604	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
972		1605
973	if (!once)	1606	if (!once)
974	cb (EV_ERROR, arg);	1607	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
975	else	1608	else
976	{	1609	{
977	once->cb = cb;	1610	once->cb = cb;
978	once->arg = arg;	1611	once->arg = arg;
979		1612
980	evw_init (&once->io, once_cb_io);	1613	ev_init (&once->io, once_cb_io);
981
982	if (fd >= 0)	1614	if (fd >= 0)
983	{	1615	{
984	evio_set (&once->io, fd, events);	1616	ev_io_set (&once->io, fd, events);
985	evio_start (&once->io);	1617	ev_io_start (EV_A_ &once->io);
986	}	1618	}
987		1619
988	evw_init (&once->to, once_cb_to);	1620	ev_init (&once->to, once_cb_to);
989
990	if (timeout >= 0.)	1621	if (timeout >= 0.)
991	{	1622	{
992	evtimer_set (&once->to, timeout, 0.);	1623	ev_timer_set (&once->to, timeout, 0.);
993	evtimer_start (&once->to);	1624	ev_timer_start (EV_A_ &once->to);
994	}	1625	}
995	}	1626	}
996	}	1627	}
997		1628
998	/*****************************************************************************/	1629	#ifdef __cplusplus
999
1000	#if 0
1001
1002	struct ev_io wio;
1003
1004	static void
1005	sin_cb (struct ev_io *w, int revents)
1006	{
1007	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1008	}	1630	}
1009
1010	static void
1011	ocb (struct ev_timer *w, int revents)
1012	{
1013	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1014	evtimer_stop (w);
1015	evtimer_start (w);
1016	}
1017
1018	static void
1019	scb (struct ev_signal *w, int revents)
1020	{
1021	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1022	evio_stop (&wio);
1023	evio_start (&wio);
1024	}
1025
1026	static void
1027	gcb (struct ev_signal *w, int revents)
1028	{
1029	fprintf (stderr, "generic %x\n", revents);
1030
1031	}
1032
1033	int main (void)
1034	{
1035	ev_init (0);
1036
1037	evio_init (&wio, sin_cb, 0, EV_READ);
1038	evio_start (&wio);
1039
1040	struct ev_timer t[10000];
1041
1042	#if 0
1043	int i;
1044	for (i = 0; i < 10000; ++i)
1045	{
1046	struct ev_timer *w = t + i;
1047	evw_init (w, ocb, i);
1048	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1049	evtimer_start (w);
1050	if (drand48 () < 0.5)
1051	evtimer_stop (w);
1052	}
1053	#endif	1631	#endif
1054		1632
1055	struct ev_timer t1;
1056	evtimer_init (&t1, ocb, 5, 10);
1057	evtimer_start (&t1);
1058
1059	struct ev_signal sig;
1060	evsignal_init (&sig, scb, SIGQUIT);
1061	evsignal_start (&sig);
1062
1063	struct ev_check cw;
1064	evcheck_init (&cw, gcb);
1065	evcheck_start (&cw);
1066
1067	struct ev_idle iw;
1068	evidle_init (&iw, gcb);
1069	evidle_start (&iw);
1070
1071	ev_loop (0);
1072
1073	return 0;
1074	}
1075
1076	#endif
1077
1078
1079
1080

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