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Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.117 by ayin, Thu Nov 15 17:15:56 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/time.h>	75	#include <sys/types.h>
42	#include <time.h>	76	#include <time.h>
43		77
44	#ifndef HAVE_MONOTONIC	78	#include <signal.h>
45	# ifdef CLOCK_MONOTONIC	79
46	# define HAVE_MONOTONIC 1	80	#ifndef _WIN32
		81	# include <unistd.h>
		82	# include <sys/time.h>
		83	# include <sys/wait.h>
		84	#else
		85	# define WIN32_LEAN_AND_MEAN
		86	# include <windows.h>
		87	# ifndef EV_SELECT_IS_WINSOCKET
		88	# define EV_SELECT_IS_WINSOCKET 1
47	# endif	89	# endif
48	#endif	90	#endif
49		91
		92	/**/
		93
		94	#ifndef EV_USE_MONOTONIC
		95	# define EV_USE_MONOTONIC 1
		96	#endif
		97
50	#ifndef HAVE_SELECT	98	#ifndef EV_USE_SELECT
51	# define HAVE_SELECT 1	99	# define EV_USE_SELECT 1
		100	# define EV_SELECT_USE_FD_SET 1
		101	#endif
		102
		103	#ifndef EV_USE_POLL
		104	# ifdef _WIN32
		105	# define EV_USE_POLL 0
		106	# else
		107	# define EV_USE_POLL 1
52	#endif	108	# endif
		109	#endif
53		110
54	#ifndef HAVE_EPOLL	111	#ifndef EV_USE_EPOLL
55	# define HAVE_EPOLL 0	112	# define EV_USE_EPOLL 0
56	#endif	113	#endif
57		114
		115	#ifndef EV_USE_KQUEUE
		116	# define EV_USE_KQUEUE 0
		117	#endif
		118
58	#ifndef HAVE_REALTIME	119	#ifndef EV_USE_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	120	# define EV_USE_REALTIME 1
60	#endif	121	#endif
		122
		123	/**/
		124
		125	/* darwin simply cannot be helped */
		126	#ifdef __APPLE__
		127	# undef EV_USE_POLL
		128	# undef EV_USE_KQUEUE
		129	#endif
		130
		131	#ifndef CLOCK_MONOTONIC
		132	# undef EV_USE_MONOTONIC
		133	# define EV_USE_MONOTONIC 0
		134	#endif
		135
		136	#ifndef CLOCK_REALTIME
		137	# undef EV_USE_REALTIME
		138	# define EV_USE_REALTIME 0
		139	#endif
		140
		141	#if EV_SELECT_IS_WINSOCKET
		142	# include <winsock.h>
		143	#endif
		144
		145	/**/
61		146
62	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	147	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63	#define MAX_BLOCKTIME 60.	148	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		149	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		150	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
64		151
		152	#ifdef EV_H
		153	# include EV_H
		154	#else
65	#include "ev.h"	155	# include "ev.h"
		156	#endif
		157
		158	#if __GNUC__ >= 3
		159	# define expect(expr,value) __builtin_expect ((expr),(value))
		160	# define inline inline
		161	#else
		162	# define expect(expr,value) (expr)
		163	# define inline static
		164	#endif
		165
		166	#define expect_false(expr) expect ((expr) != 0, 0)
		167	#define expect_true(expr) expect ((expr) != 0, 1)
		168
		169	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		170	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		171
		172	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		173	#define EMPTY2(a,b) /* used to suppress some warnings */
66		174
67	typedef struct ev_watcher *W;	175	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	176	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	177	typedef struct ev_watcher_time *WT;
70		178
71	static ev_tstamp now, diff; /* monotonic clock */	179	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		180
		181	#ifdef _WIN32
		182	# include "ev_win32.c"
		183	#endif
		184
		185	/*****************************************************************************/
		186
		187	static void (*syserr_cb)(const char *msg);
		188
		189	void ev_set_syserr_cb (void (*cb)(const char *msg))
		190	{
		191	syserr_cb = cb;
		192	}
		193
		194	static void
		195	syserr (const char *msg)
		196	{
		197	if (!msg)
		198	msg = "(libev) system error";
		199
		200	if (syserr_cb)
		201	syserr_cb (msg);
		202	else
		203	{
		204	perror (msg);
		205	abort ();
		206	}
		207	}
		208
		209	static void *(*alloc)(void *ptr, long size);
		210
		211	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		212	{
		213	alloc = cb;
		214	}
		215
		216	static void *
		217	ev_realloc (void *ptr, long size)
		218	{
		219	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		220
		221	if (!ptr && size)
		222	{
		223	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		224	abort ();
		225	}
		226
		227	return ptr;
		228	}
		229
		230	#define ev_malloc(size) ev_realloc (0, (size))
		231	#define ev_free(ptr) ev_realloc ((ptr), 0)
		232
		233	/*****************************************************************************/
		234
		235	typedef struct
		236	{
		237	WL head;
		238	unsigned char events;
		239	unsigned char reify;
		240	#if EV_SELECT_IS_WINSOCKET
		241	SOCKET handle;
		242	#endif
		243	} ANFD;
		244
		245	typedef struct
		246	{
		247	W w;
		248	int events;
		249	} ANPENDING;
		250
		251	#if EV_MULTIPLICITY
		252
		253	struct ev_loop
		254	{
		255	ev_tstamp ev_rt_now;
		256	#define ev_rt_now ((loop)->ev_rt_now)
		257	#define VAR(name,decl) decl;
		258	#include "ev_vars.h"
		259	#undef VAR
		260	};
		261	#include "ev_wrap.h"
		262
		263	static struct ev_loop default_loop_struct;
		264	struct ev_loop *ev_default_loop_ptr;
		265
		266	#else
		267
72	ev_tstamp ev_now;	268	ev_tstamp ev_rt_now;
73	int ev_method;	269	#define VAR(name,decl) static decl;
		270	#include "ev_vars.h"
		271	#undef VAR
74		272
75	static int have_monotonic; /* runtime */	273	static int ev_default_loop_ptr;
76		274
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	275	#endif
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		276
81	/*****************************************************************************/	277	/*****************************************************************************/
82		278
83	ev_tstamp	279	ev_tstamp
84	ev_time (void)	280	ev_time (void)
85	{	281	{
86	#if HAVE_REALTIME	282	#if EV_USE_REALTIME
87	struct timespec ts;	283	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	284	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	285	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	286	#else
91	struct timeval tv;	287	struct timeval tv;
92	gettimeofday (&tv, 0);	288	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	289	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	290	#endif
95	}	291	}
96		292
97	static ev_tstamp	293	inline ev_tstamp
98	get_clock (void)	294	get_clock (void)
99	{	295	{
100	#if HAVE_MONOTONIC	296	#if EV_USE_MONOTONIC
101	if (have_monotonic)	297	if (expect_true (have_monotonic))
102	{	298	{
103	struct timespec ts;	299	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	300	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	301	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	302	}
107	#endif	303	#endif
108		304
109	return ev_time ();	305	return ev_time ();
110	}	306	}
111		307
		308	#if EV_MULTIPLICITY
		309	ev_tstamp
		310	ev_now (EV_P)
		311	{
		312	return ev_rt_now;
		313	}
		314	#endif
		315
		316	#define array_roundsize(type,n) (((n) | 4) & ~3)
		317
112	#define array_needsize(base,cur,cnt,init) \	318	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	319	if (expect_false ((cnt) > cur)) \
114	{ \	320	{ \
115	int newcnt = cur ? cur << 1 : 16; \	321	int newcnt = cur; \
		322	do \
		323	{ \
		324	newcnt = array_roundsize (type, newcnt << 1); \
		325	} \
		326	while ((cnt) > newcnt); \
		327	\
116	base = realloc (base, sizeof (*base) * (newcnt)); \	328	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
117	init (base + cur, newcnt - cur); \	329	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	330	cur = newcnt; \
119	}	331	}
		332
		333	#define array_slim(type,stem) \
		334	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		335	{ \
		336	stem ## max = array_roundsize (stem ## cnt >> 1); \
		337	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		338	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		339	}
		340
		341	#define array_free(stem, idx) \
		342	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		343
121	/*****************************************************************************/	344	/*****************************************************************************/
122		345
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	346	static void
136	anfds_init (ANFD *base, int count)	347	anfds_init (ANFD *base, int count)
137	{	348	{
138	while (count--)	349	while (count--)
139	{	350	{
140	base->head = 0;	351	base->head = 0;
141	base->wev = base->rev = EV_NONE;	352	base->events = EV_NONE;
		353	base->reify = 0;
		354
142	++base;	355	++base;
143	}	356	}
144	}	357	}
145		358
146	typedef struct	359	void
		360	ev_feed_event (EV_P_ void *w, int revents)
147	{	361	{
148	W w;	362	W w_ = (W)w;
149	int events;
150	} ANPENDING;
151		363
152	static ANPENDING *pendings;	364	if (w_->pending)
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{	365	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	366	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		367	return;
164	}	368	}
165	}
166		369
		370	w_->pending = ++pendingcnt [ABSPRI (w_)];
		371	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		372	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		373	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		374	}
		375
167	static void	376	static void
		377	queue_events (EV_P_ W *events, int eventcnt, int type)
		378	{
		379	int i;
		380
		381	for (i = 0; i < eventcnt; ++i)
		382	ev_feed_event (EV_A_ events [i], type);
		383	}
		384
		385	inline void
168	fd_event (int fd, int events)	386	fd_event (EV_P_ int fd, int revents)
169	{	387	{
170	ANFD *anfd = anfds + fd;	388	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	389	struct ev_io *w;
172		390
173	for (w = anfd->head; w; w = w->next)	391	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
174	{	392	{
175	int ev = w->events & events;	393	int ev = w->events & revents;
176		394
177	if (ev)	395	if (ev)
178	event ((W)w, ev);	396	ev_feed_event (EV_A_ (W)w, ev);
179	}	397	}
180	}	398	}
181		399
182	static void	400	void
183	queue_events (W *events, int eventcnt, int type)	401	ev_feed_fd_event (EV_P_ int fd, int revents)
184	{	402	{
185	int i;	403	fd_event (EV_A_ fd, revents);
186
187	for (i = 0; i < eventcnt; ++i)
188	event (events [i], type);
189	}
190
191	/* called on EBADF to verify fds */
192	static void
193	fd_recheck ()
194	{
195	int fd;
196
197	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)
201	evio_stop (anfds [fd].head);
202	}	404	}
203		405
204	/*****************************************************************************/	406	/*****************************************************************************/
205		407
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	408	static void
213	upheap (WT *timers, int k)	409	fd_reify (EV_P)
214	{
215	WT w = timers [k];
216
217	while (k && timers [k >> 1]->at > w->at)
218	{
219	timers [k] = timers [k >> 1];
220	timers [k]->active = k + 1;
221	k >>= 1;
222	}
223
224	timers [k] = w;
225	timers [k]->active = k + 1;
226
227	}
228
229	static void
230	downheap (WT *timers, int N, int k)
231	{
232	WT w = timers [k];
233
234	while (k < (N >> 1))
235	{
236	int j = k << 1;
237
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239	++j;
240
241	if (w->at <= timers [j]->at)
242	break;
243
244	timers [k] = timers [j];
245	timers [k]->active = k + 1;
246	k = j;
247	}
248
249	timers [k] = w;
250	timers [k]->active = k + 1;
251	}
252
253	/*****************************************************************************/
254
255	typedef struct
256	{
257	struct ev_signal *head;
258	sig_atomic_t gotsig;
259	} ANSIG;
260
261	static ANSIG *signals;
262	static int signalmax;
263
264	static int sigpipe [2];
265	static sig_atomic_t gotsig;
266	static struct ev_io sigev;
267
268	static void
269	signals_init (ANSIG *base, int count)
270	{
271	while (count--)
272	{
273	base->head = 0;
274	base->gotsig = 0;
275	++base;
276	}
277	}
278
279	static void
280	sighandler (int signum)
281	{
282	signals [signum - 1].gotsig = 1;
283
284	if (!gotsig)
285	{
286	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);
288	}
289	}
290
291	static void
292	sigcb (struct ev_io *iow, int revents)
293	{
294	struct ev_signal *w;
295	int sig;
296
297	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299
300	for (sig = signalmax; sig--; )
301	if (signals [sig].gotsig)
302	{
303	signals [sig].gotsig = 0;
304
305	for (w = signals [sig].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);
307	}
308	}
309
310	static void
311	siginit (void)
312	{
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315
316	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
319
320	evio_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);
322	}
323
324	/*****************************************************************************/
325
326	static struct ev_idle **idles;
327	static int idlemax, idlecnt;
328
329	static struct ev_prepare **prepares;
330	static int preparemax, preparecnt;
331
332	static struct ev_check **checks;
333	static int checkmax, checkcnt;
334
335	/*****************************************************************************/
336
337	#if HAVE_EPOLL
338	# include "ev_epoll.c"
339	#endif
340	#if HAVE_SELECT
341	# include "ev_select.c"
342	#endif
343
344	int ev_init (int flags)
345	{
346	#if HAVE_MONOTONIC
347	{
348	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;
351	}
352	#endif
353
354	ev_now = ev_time ();
355	now = get_clock ();
356	diff = ev_now - now;
357
358	if (pipe (sigpipe))
359	return 0;
360
361	ev_method = EVMETHOD_NONE;
362	#if HAVE_EPOLL
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364	#endif
365	#if HAVE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);
367	#endif
368
369	if (ev_method)
370	{
371	evw_init (&sigev, sigcb);
372	siginit ();
373	}
374
375	return ev_method;
376	}
377
378	/*****************************************************************************/
379
380	void ev_prefork (void)
381	{
382	/* nop */
383	}
384
385	void ev_postfork_parent (void)
386	{
387	/* nop */
388	}
389
390	void ev_postfork_child (void)
391	{
392	#if HAVE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();
395	#endif
396
397	evio_stop (&sigev);
398	close (sigpipe [0]);
399	close (sigpipe [1]);
400	pipe (sigpipe);
401	siginit ();
402	}
403
404	/*****************************************************************************/
405
406	static void
407	fd_reify (void)
408	{	410	{
409	int i;	411	int i;
410		412
411	for (i = 0; i < fdchangecnt; ++i)	413	for (i = 0; i < fdchangecnt; ++i)
412	{	414	{
413	int fd = fdchanges [i];	415	int fd = fdchanges [i];
414	ANFD *anfd = anfds + fd;	416	ANFD *anfd = anfds + fd;
415	struct ev_io *w;	417	struct ev_io *w;
416		418
417	int wev = 0;	419	int events = 0;
418		420
419	for (w = anfd->head; w; w = w->next)	421	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
420	wev |= w->events;	422	events |= w->events;
421		423
422	if (anfd->wev != wev)	424	#if EV_SELECT_IS_WINSOCKET
		425	if (events)
423	{	426	{
424	method_modify (fd, anfd->wev, wev);	427	unsigned long argp;
425	anfd->wev = wev;	428	anfd->handle = _get_osfhandle (fd);
		429	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
426	}	430	}
		431	#endif
		432
		433	anfd->reify = 0;
		434
		435	method_modify (EV_A_ fd, anfd->events, events);
		436	anfd->events = events;
427	}	437	}
428		438
429	fdchangecnt = 0;	439	fdchangecnt = 0;
430	}	440	}
431		441
432	static void	442	static void
433	call_pending ()	443	fd_change (EV_P_ int fd)
434	{	444	{
435	while (pendingcnt)	445	if (anfds [fd].reify)
		446	return;
		447
		448	anfds [fd].reify = 1;
		449
		450	++fdchangecnt;
		451	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		452	fdchanges [fdchangecnt - 1] = fd;
		453	}
		454
		455	static void
		456	fd_kill (EV_P_ int fd)
		457	{
		458	struct ev_io *w;
		459
		460	while ((w = (struct ev_io *)anfds [fd].head))
		461	{
		462	ev_io_stop (EV_A_ w);
		463	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		464	}
		465	}
		466
		467	static int
		468	fd_valid (int fd)
		469	{
		470	#ifdef _WIN32
		471	return _get_osfhandle (fd) != -1;
		472	#else
		473	return fcntl (fd, F_GETFD) != -1;
		474	#endif
		475	}
		476
		477	/* called on EBADF to verify fds */
		478	static void
		479	fd_ebadf (EV_P)
		480	{
		481	int fd;
		482
		483	for (fd = 0; fd < anfdmax; ++fd)
		484	if (anfds [fd].events)
		485	if (!fd_valid (fd) == -1 && errno == EBADF)
		486	fd_kill (EV_A_ fd);
		487	}
		488
		489	/* called on ENOMEM in select/poll to kill some fds and retry */
		490	static void
		491	fd_enomem (EV_P)
		492	{
		493	int fd;
		494
		495	for (fd = anfdmax; fd--; )
		496	if (anfds [fd].events)
436	{	497	{
437	ANPENDING *p = pendings + --pendingcnt;	498	fd_kill (EV_A_ fd);
		499	return;
		500	}
		501	}
438		502
439	if (p->w)	503	/* usually called after fork if method needs to re-arm all fds from scratch */
		504	static void
		505	fd_rearm_all (EV_P)
		506	{
		507	int fd;
		508
		509	/* this should be highly optimised to not do anything but set a flag */
		510	for (fd = 0; fd < anfdmax; ++fd)
		511	if (anfds [fd].events)
		512	{
		513	anfds [fd].events = 0;
		514	fd_change (EV_A_ fd);
		515	}
		516	}
		517
		518	/*****************************************************************************/
		519
		520	static void
		521	upheap (WT *heap, int k)
		522	{
		523	WT w = heap [k];
		524
		525	while (k && heap [k >> 1]->at > w->at)
		526	{
		527	heap [k] = heap [k >> 1];
		528	((W)heap [k])->active = k + 1;
		529	k >>= 1;
		530	}
		531
		532	heap [k] = w;
		533	((W)heap [k])->active = k + 1;
		534
		535	}
		536
		537	static void
		538	downheap (WT *heap, int N, int k)
		539	{
		540	WT w = heap [k];
		541
		542	while (k < (N >> 1))
		543	{
		544	int j = k << 1;
		545
		546	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		547	++j;
		548
		549	if (w->at <= heap [j]->at)
		550	break;
		551
		552	heap [k] = heap [j];
		553	((W)heap [k])->active = k + 1;
		554	k = j;
		555	}
		556
		557	heap [k] = w;
		558	((W)heap [k])->active = k + 1;
		559	}
		560
		561	inline void
		562	adjustheap (WT *heap, int N, int k)
		563	{
		564	upheap (heap, k);
		565	downheap (heap, N, k);
		566	}
		567
		568	/*****************************************************************************/
		569
		570	typedef struct
		571	{
		572	WL head;
		573	sig_atomic_t volatile gotsig;
		574	} ANSIG;
		575
		576	static ANSIG *signals;
		577	static int signalmax;
		578
		579	static int sigpipe [2];
		580	static sig_atomic_t volatile gotsig;
		581	static struct ev_io sigev;
		582
		583	static void
		584	signals_init (ANSIG *base, int count)
		585	{
		586	while (count--)
		587	{
		588	base->head = 0;
		589	base->gotsig = 0;
		590
		591	++base;
		592	}
		593	}
		594
		595	static void
		596	sighandler (int signum)
		597	{
		598	#if _WIN32
		599	signal (signum, sighandler);
		600	#endif
		601
		602	signals [signum - 1].gotsig = 1;
		603
		604	if (!gotsig)
		605	{
		606	int old_errno = errno;
		607	gotsig = 1;
		608	write (sigpipe [1], &signum, 1);
		609	errno = old_errno;
		610	}
		611	}
		612
		613	void
		614	ev_feed_signal_event (EV_P_ int signum)
		615	{
		616	WL w;
		617
		618	#if EV_MULTIPLICITY
		619	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		620	#endif
		621
		622	--signum;
		623
		624	if (signum < 0 || signum >= signalmax)
		625	return;
		626
		627	signals [signum].gotsig = 0;
		628
		629	for (w = signals [signum].head; w; w = w->next)
		630	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		631	}
		632
		633	static void
		634	sigcb (EV_P_ struct ev_io *iow, int revents)
		635	{
		636	int signum;
		637
		638	read (sigpipe [0], &revents, 1);
		639	gotsig = 0;
		640
		641	for (signum = signalmax; signum--; )
		642	if (signals [signum].gotsig)
		643	ev_feed_signal_event (EV_A_ signum + 1);
		644	}
		645
		646	inline void
		647	fd_intern (int fd)
		648	{
		649	#ifdef _WIN32
		650	int arg = 1;
		651	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		652	#else
		653	fcntl (fd, F_SETFD, FD_CLOEXEC);
		654	fcntl (fd, F_SETFL, O_NONBLOCK);
		655	#endif
		656	}
		657
		658	static void
		659	siginit (EV_P)
		660	{
		661	fd_intern (sigpipe [0]);
		662	fd_intern (sigpipe [1]);
		663
		664	ev_io_set (&sigev, sigpipe [0], EV_READ);
		665	ev_io_start (EV_A_ &sigev);
		666	ev_unref (EV_A); /* child watcher should not keep loop alive */
		667	}
		668
		669	/*****************************************************************************/
		670
		671	static struct ev_child *childs [PID_HASHSIZE];
		672
		673	#ifndef _WIN32
		674
		675	static struct ev_signal childev;
		676
		677	#ifndef WCONTINUED
		678	# define WCONTINUED 0
		679	#endif
		680
		681	static void
		682	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		683	{
		684	struct ev_child *w;
		685
		686	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		687	if (w->pid == pid || !w->pid)
		688	{
		689	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		690	w->rpid = pid;
		691	w->rstatus = status;
		692	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		693	}
		694	}
		695
		696	static void
		697	childcb (EV_P_ struct ev_signal *sw, int revents)
		698	{
		699	int pid, status;
		700
		701	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		702	{
		703	/* make sure we are called again until all childs have been reaped */
		704	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		705
		706	child_reap (EV_A_ sw, pid, pid, status);
		707	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		708	}
		709	}
		710
		711	#endif
		712
		713	/*****************************************************************************/
		714
		715	#if EV_USE_KQUEUE
		716	# include "ev_kqueue.c"
		717	#endif
		718	#if EV_USE_EPOLL
		719	# include "ev_epoll.c"
		720	#endif
		721	#if EV_USE_POLL
		722	# include "ev_poll.c"
		723	#endif
		724	#if EV_USE_SELECT
		725	# include "ev_select.c"
		726	#endif
		727
		728	int
		729	ev_version_major (void)
		730	{
		731	return EV_VERSION_MAJOR;
		732	}
		733
		734	int
		735	ev_version_minor (void)
		736	{
		737	return EV_VERSION_MINOR;
		738	}
		739
		740	/* return true if we are running with elevated privileges and should ignore env variables */
		741	static int
		742	enable_secure (void)
		743	{
		744	#ifdef _WIN32
		745	return 0;
		746	#else
		747	return getuid () != geteuid ()
		748	|| getgid () != getegid ();
		749	#endif
		750	}
		751
		752	unsigned int
		753	ev_method (EV_P)
		754	{
		755	return method;
		756	}
		757
		758	static void
		759	loop_init (EV_P_ unsigned int flags)
		760	{
		761	if (!method)
		762	{
		763	#if EV_USE_MONOTONIC
		764	{
		765	struct timespec ts;
		766	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		767	have_monotonic = 1;
		768	}
		769	#endif
		770
		771	ev_rt_now = ev_time ();
		772	mn_now = get_clock ();
		773	now_floor = mn_now;
		774	rtmn_diff = ev_rt_now - mn_now;
		775
		776	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
		777	flags = atoi (getenv ("LIBEV_FLAGS"));
		778
		779	if (!(flags & 0x0000ffff))
		780	flags |= 0x0000ffff;
		781
		782	method = 0;
		783	#if EV_USE_KQUEUE
		784	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		785	#endif
		786	#if EV_USE_EPOLL
		787	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
		788	#endif
		789	#if EV_USE_POLL
		790	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
		791	#endif
		792	#if EV_USE_SELECT
		793	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
		794	#endif
		795
		796	ev_init (&sigev, sigcb);
		797	ev_set_priority (&sigev, EV_MAXPRI);
		798	}
		799	}
		800
		801	void
		802	loop_destroy (EV_P)
		803	{
		804	int i;
		805
		806	#if EV_USE_KQUEUE
		807	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		808	#endif
		809	#if EV_USE_EPOLL
		810	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		811	#endif
		812	#if EV_USE_POLL
		813	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		814	#endif
		815	#if EV_USE_SELECT
		816	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		817	#endif
		818
		819	for (i = NUMPRI; i--; )
		820	array_free (pending, [i]);
		821
		822	/* have to use the microsoft-never-gets-it-right macro */
		823	array_free (fdchange, EMPTY0);
		824	array_free (timer, EMPTY0);
		825	#if EV_PERIODICS
		826	array_free (periodic, EMPTY0);
		827	#endif
		828	array_free (idle, EMPTY0);
		829	array_free (prepare, EMPTY0);
		830	array_free (check, EMPTY0);
		831
		832	method = 0;
		833	}
		834
		835	static void
		836	loop_fork (EV_P)
		837	{
		838	#if EV_USE_EPOLL
		839	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		840	#endif
		841	#if EV_USE_KQUEUE
		842	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		843	#endif
		844
		845	if (ev_is_active (&sigev))
		846	{
		847	/* default loop */
		848
		849	ev_ref (EV_A);
		850	ev_io_stop (EV_A_ &sigev);
		851	close (sigpipe [0]);
		852	close (sigpipe [1]);
		853
		854	while (pipe (sigpipe))
		855	syserr ("(libev) error creating pipe");
		856
		857	siginit (EV_A);
		858	}
		859
		860	postfork = 0;
		861	}
		862
		863	#if EV_MULTIPLICITY
		864	struct ev_loop *
		865	ev_loop_new (unsigned int flags)
		866	{
		867	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		868
		869	memset (loop, 0, sizeof (struct ev_loop));
		870
		871	loop_init (EV_A_ flags);
		872
		873	if (ev_method (EV_A))
		874	return loop;
		875
		876	return 0;
		877	}
		878
		879	void
		880	ev_loop_destroy (EV_P)
		881	{
		882	loop_destroy (EV_A);
		883	ev_free (loop);
		884	}
		885
		886	void
		887	ev_loop_fork (EV_P)
		888	{
		889	postfork = 1;
		890	}
		891
		892	#endif
		893
		894	#if EV_MULTIPLICITY
		895	struct ev_loop *
		896	ev_default_loop_ (unsigned int flags)
		897	#else
		898	int
		899	ev_default_loop (unsigned int flags)
		900	#endif
		901	{
		902	if (sigpipe [0] == sigpipe [1])
		903	if (pipe (sigpipe))
		904	return 0;
		905
		906	if (!ev_default_loop_ptr)
		907	{
		908	#if EV_MULTIPLICITY
		909	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		910	#else
		911	ev_default_loop_ptr = 1;
		912	#endif
		913
		914	loop_init (EV_A_ flags);
		915
		916	if (ev_method (EV_A))
440	{	917	{
441	p->w->pending = 0;	918	siginit (EV_A);
442	p->w->cb (p->w, p->events);	919
		920	#ifndef _WIN32
		921	ev_signal_init (&childev, childcb, SIGCHLD);
		922	ev_set_priority (&childev, EV_MAXPRI);
		923	ev_signal_start (EV_A_ &childev);
		924	ev_unref (EV_A); /* child watcher should not keep loop alive */
		925	#endif
443	}	926	}
		927	else
		928	ev_default_loop_ptr = 0;
		929	}
		930
		931	return ev_default_loop_ptr;
		932	}
		933
		934	void
		935	ev_default_destroy (void)
		936	{
		937	#if EV_MULTIPLICITY
		938	struct ev_loop *loop = ev_default_loop_ptr;
		939	#endif
		940
		941	#ifndef _WIN32
		942	ev_ref (EV_A); /* child watcher */
		943	ev_signal_stop (EV_A_ &childev);
		944	#endif
		945
		946	ev_ref (EV_A); /* signal watcher */
		947	ev_io_stop (EV_A_ &sigev);
		948
		949	close (sigpipe [0]); sigpipe [0] = 0;
		950	close (sigpipe [1]); sigpipe [1] = 0;
		951
		952	loop_destroy (EV_A);
		953	}
		954
		955	void
		956	ev_default_fork (void)
		957	{
		958	#if EV_MULTIPLICITY
		959	struct ev_loop *loop = ev_default_loop_ptr;
		960	#endif
		961
		962	if (method)
		963	postfork = 1;
		964	}
		965
		966	/*****************************************************************************/
		967
		968	static int
		969	any_pending (EV_P)
		970	{
		971	int pri;
		972
		973	for (pri = NUMPRI; pri--; )
		974	if (pendingcnt [pri])
		975	return 1;
		976
		977	return 0;
		978	}
		979
		980	static void
		981	call_pending (EV_P)
		982	{
		983	int pri;
		984
		985	for (pri = NUMPRI; pri--; )
		986	while (pendingcnt [pri])
		987	{
		988	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		989
		990	if (p->w)
		991	{
		992	p->w->pending = 0;
		993	EV_CB_INVOKE (p->w, p->events);
		994	}
444	}	995	}
445	}	996	}
446		997
447	static void	998	static void
448	timers_reify ()	999	timers_reify (EV_P)
449	{	1000	{
450	while (timercnt && timers [0]->at <= now)	1001	while (timercnt && ((WT)timers [0])->at <= mn_now)
451	{	1002	{
452	struct ev_timer *w = timers [0];	1003	struct ev_timer *w = timers [0];
453		1004
454	event ((W)w, EV_TIMEOUT);	1005	assert (("inactive timer on timer heap detected", ev_is_active (w)));
455		1006
456	/* first reschedule or stop timer */	1007	/* first reschedule or stop timer */
457	if (w->repeat)	1008	if (w->repeat)
458	{	1009	{
		1010	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1011
459	w->at = now + w->repeat;	1012	((WT)w)->at += w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));	1013	if (((WT)w)->at < mn_now)
		1014	((WT)w)->at = mn_now;
		1015
461	downheap ((WT *)timers, timercnt, 0);	1016	downheap ((WT *)timers, timercnt, 0);
462	}	1017	}
463	else	1018	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	1019	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		1020
		1021	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1022	}
		1023	}
		1024
		1025	#if EV_PERIODICS
468	static void	1026	static void
469	periodics_reify ()	1027	periodics_reify (EV_P)
470	{	1028	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	1029	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
472	{	1030	{
473	struct ev_periodic *w = periodics [0];	1031	struct ev_periodic *w = periodics [0];
474		1032
		1033	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1034
475	/* first reschedule or stop timer */	1035	/* first reschedule or stop timer */
476	if (w->interval)	1036	if (w->reschedule_cb)
477	{	1037	{
		1038	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1039	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1040	downheap ((WT *)periodics, periodiccnt, 0);
		1041	}
		1042	else if (w->interval)
		1043	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1044	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
479	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1045	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
480	downheap ((WT *)periodics, periodiccnt, 0);	1046	downheap ((WT *)periodics, periodiccnt, 0);
481	}	1047	}
482	else	1048	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	1049	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		1050
485	event ((W)w, EV_TIMEOUT);	1051	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486	}	1052	}
487	}	1053	}
488		1054
489	static void	1055	static void
490	periodics_reschedule (ev_tstamp diff)	1056	periodics_reschedule (EV_P)
491	{	1057	{
492	int i;	1058	int i;
493		1059
494	/* adjust periodics after time jump */	1060	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	1061	for (i = 0; i < periodiccnt; ++i)
496	{	1062	{
497	struct ev_periodic *w = periodics [i];	1063	struct ev_periodic *w = periodics [i];
498		1064
		1065	if (w->reschedule_cb)
		1066	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
499	if (w->interval)	1067	else if (w->interval)
		1068	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1069	}
		1070
		1071	/* now rebuild the heap */
		1072	for (i = periodiccnt >> 1; i--; )
		1073	downheap ((WT *)periodics, periodiccnt, i);
		1074	}
		1075	#endif
		1076
		1077	inline int
		1078	time_update_monotonic (EV_P)
		1079	{
		1080	mn_now = get_clock ();
		1081
		1082	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1083	{
		1084	ev_rt_now = rtmn_diff + mn_now;
		1085	return 0;
		1086	}
		1087	else
		1088	{
		1089	now_floor = mn_now;
		1090	ev_rt_now = ev_time ();
		1091	return 1;
		1092	}
		1093	}
		1094
		1095	static void
		1096	time_update (EV_P)
		1097	{
		1098	int i;
		1099
		1100	#if EV_USE_MONOTONIC
		1101	if (expect_true (have_monotonic))
		1102	{
		1103	if (time_update_monotonic (EV_A))
500	{	1104	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1105	ev_tstamp odiff = rtmn_diff;
502		1106
503	if (fabs (diff) >= 1e-4)	1107	for (i = 4; --i; ) /* loop a few times, before making important decisions */
504	{	1108	{
505	evperiodic_stop (w);	1109	rtmn_diff = ev_rt_now - mn_now;
506	evperiodic_start (w);
507		1110
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1111	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1112	return; /* all is well */
		1113
		1114	ev_rt_now = ev_time ();
		1115	mn_now = get_clock ();
		1116	now_floor = mn_now;
509	}	1117	}
		1118
		1119	# if EV_PERIODICS
		1120	periodics_reschedule (EV_A);
		1121	# endif
		1122	/* no timer adjustment, as the monotonic clock doesn't jump */
		1123	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
510	}	1124	}
511	}	1125	}
512	}	1126	else
513		1127	#endif
514	static void	1128	{
515	time_update ()
516	{
517	int i;
518
519	ev_now = ev_time ();	1129	ev_rt_now = ev_time ();
520		1130
521	if (have_monotonic)	1131	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
522	{
523	ev_tstamp odiff = diff;
524
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
526	{	1132	{
527	now = get_clock ();	1133	#if EV_PERIODICS
528	diff = ev_now - now;
529
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)
531	return; /* all is well */
532
533	ev_now = ev_time ();
534	}
535
536	periodics_reschedule (diff - odiff);
537	/* no timer adjustment, as the monotonic clock doesn't jump */
538	}
539	else
540	{
541	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
542	{
543	periodics_reschedule (ev_now - now);	1134	periodics_reschedule (EV_A);
		1135	#endif
544		1136
545	/* adjust timers. this is easy, as the offset is the same for all */	1137	/* adjust timers. this is easy, as the offset is the same for all */
546	for (i = 0; i < timercnt; ++i)	1138	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	1139	((WT)timers [i])->at += ev_rt_now - mn_now;
548	}	1140	}
549		1141
550	now = ev_now;	1142	mn_now = ev_rt_now;
551	}	1143	}
552	}	1144	}
553		1145
554	int ev_loop_done;	1146	void
		1147	ev_ref (EV_P)
		1148	{
		1149	++activecnt;
		1150	}
555		1151
		1152	void
		1153	ev_unref (EV_P)
		1154	{
		1155	--activecnt;
		1156	}
		1157
		1158	static int loop_done;
		1159
		1160	void
556	void ev_loop (int flags)	1161	ev_loop (EV_P_ int flags)
557	{	1162	{
558	double block;	1163	double block;
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1164	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
560		1165
561	do	1166	while (activecnt)
562	{	1167	{
563	/* queue check watchers (and execute them) */	1168	/* queue check watchers (and execute them) */
564	if (checkcnt)	1169	if (expect_false (preparecnt))
565	{	1170	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1171	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	1172	call_pending (EV_A);
568	}	1173	}
569		1174
		1175	/* we might have forked, so reify kernel state if necessary */
		1176	if (expect_false (postfork))
		1177	loop_fork (EV_A);
		1178
570	/* update fd-related kernel structures */	1179	/* update fd-related kernel structures */
571	fd_reify ();	1180	fd_reify (EV_A);
572		1181
573	/* calculate blocking time */	1182	/* calculate blocking time */
574		1183
575	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1184	/* we only need this for !monotonic clock or timers, but as we basically
		1185	always have timers, we just calculate it always */
		1186	#if EV_USE_MONOTONIC
		1187	if (expect_true (have_monotonic))
		1188	time_update_monotonic (EV_A);
		1189	else
		1190	#endif
		1191	{
576	ev_now = ev_time ();	1192	ev_rt_now = ev_time ();
		1193	mn_now = ev_rt_now;
		1194	}
577		1195
578	if (flags & EVLOOP_NONBLOCK || idlecnt)	1196	if (flags & EVLOOP_NONBLOCK || idlecnt)
579	block = 0.;	1197	block = 0.;
580	else	1198	else
581	{	1199	{
582	block = MAX_BLOCKTIME;	1200	block = MAX_BLOCKTIME;
583		1201
584	if (timercnt)	1202	if (timercnt)
585	{	1203	{
586	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1204	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
587	if (block > to) block = to;	1205	if (block > to) block = to;
588	}	1206	}
589		1207
		1208	#if EV_PERIODICS
590	if (periodiccnt)	1209	if (periodiccnt)
591	{	1210	{
592	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1211	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
593	if (block > to) block = to;	1212	if (block > to) block = to;
594	}	1213	}
		1214	#endif
595		1215
596	if (block < 0.) block = 0.;	1216	if (block < 0.) block = 0.;
597	}	1217	}
598		1218
599	method_poll (block);	1219	method_poll (EV_A_ block);
600		1220
601	/* update ev_now, do magic */	1221	/* update ev_rt_now, do magic */
602	time_update ();	1222	time_update (EV_A);
603		1223
604	/* queue pending timers and reschedule them */	1224	/* queue pending timers and reschedule them */
605	timers_reify (); /* relative timers called last */	1225	timers_reify (EV_A); /* relative timers called last */
		1226	#if EV_PERIODICS
606	periodics_reify (); /* absolute timers called first */	1227	periodics_reify (EV_A); /* absolute timers called first */
		1228	#endif
607		1229
608	/* queue idle watchers unless io or timers are pending */	1230	/* queue idle watchers unless io or timers are pending */
609	if (!pendingcnt)	1231	if (idlecnt && !any_pending (EV_A))
610	queue_events ((W *)idles, idlecnt, EV_IDLE);	1232	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
611		1233
612	/* queue check watchers, to be executed first */	1234	/* queue check watchers, to be executed first */
613	if (checkcnt)	1235	if (checkcnt)
614	queue_events ((W *)checks, checkcnt, EV_CHECK);	1236	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
615		1237
616	call_pending ();	1238	call_pending (EV_A);
617	}
618	while (!ev_loop_done);
619		1239
		1240	if (loop_done)
		1241	break;
		1242	}
		1243
620	if (ev_loop_done != 2)	1244	if (loop_done != 2)
621	ev_loop_done = 0;	1245	loop_done = 0;
		1246	}
		1247
		1248	void
		1249	ev_unloop (EV_P_ int how)
		1250	{
		1251	loop_done = how;
622	}	1252	}
623		1253
624	/*****************************************************************************/	1254	/*****************************************************************************/
625		1255
626	static void	1256	inline void
627	wlist_add (WL *head, WL elem)	1257	wlist_add (WL *head, WL elem)
628	{	1258	{
629	elem->next = *head;	1259	elem->next = *head;
630	*head = elem;	1260	*head = elem;
631	}	1261	}
632		1262
633	static void	1263	inline void
634	wlist_del (WL *head, WL elem)	1264	wlist_del (WL *head, WL elem)
635	{	1265	{
636	while (*head)	1266	while (*head)
637	{	1267	{
638	if (*head == elem)	1268	if (*head == elem)
…		…
643		1273
644	head = &(*head)->next;	1274	head = &(*head)->next;
645	}	1275	}
646	}	1276	}
647		1277
648	static void	1278	inline void
649	ev_clear (W w)	1279	ev_clear_pending (EV_P_ W w)
650	{	1280	{
651	if (w->pending)	1281	if (w->pending)
652	{	1282	{
653	pendings [w->pending - 1].w = 0;	1283	pendings [ABSPRI (w)][w->pending - 1].w = 0;
654	w->pending = 0;	1284	w->pending = 0;
655	}	1285	}
656	}	1286	}
657		1287
658	static void	1288	inline void
659	ev_start (W w, int active)	1289	ev_start (EV_P_ W w, int active)
660	{	1290	{
		1291	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1292	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1293
661	w->active = active;	1294	w->active = active;
		1295	ev_ref (EV_A);
662	}	1296	}
663		1297
664	static void	1298	inline void
665	ev_stop (W w)	1299	ev_stop (EV_P_ W w)
666	{	1300	{
		1301	ev_unref (EV_A);
667	w->active = 0;	1302	w->active = 0;
668	}	1303	}
669		1304
670	/*****************************************************************************/	1305	/*****************************************************************************/
671		1306
672	void	1307	void
673	evio_start (struct ev_io *w)	1308	ev_io_start (EV_P_ struct ev_io *w)
674	{	1309	{
		1310	int fd = w->fd;
		1311
675	if (ev_is_active (w))	1312	if (ev_is_active (w))
676	return;	1313	return;
677		1314
678	int fd = w->fd;	1315	assert (("ev_io_start called with negative fd", fd >= 0));
679		1316
680	ev_start ((W)w, 1);	1317	ev_start (EV_A_ (W)w, 1);
681	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1318	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
682	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1319	wlist_add ((WL *)&anfds[fd].head, (WL)w);
683		1320
684	++fdchangecnt;	1321	fd_change (EV_A_ fd);
685	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
686	fdchanges [fdchangecnt - 1] = fd;
687	}	1322	}
688		1323
689	void	1324	void
690	evio_stop (struct ev_io *w)	1325	ev_io_stop (EV_P_ struct ev_io *w)
691	{	1326	{
692	ev_clear ((W)w);	1327	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1328	if (!ev_is_active (w))
694	return;	1329	return;
695		1330
		1331	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1332
696	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1333	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
697	ev_stop ((W)w);	1334	ev_stop (EV_A_ (W)w);
698		1335
699	++fdchangecnt;	1336	fd_change (EV_A_ w->fd);
700	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
701	fdchanges [fdchangecnt - 1] = w->fd;
702	}	1337	}
703		1338
704	void	1339	void
705	evtimer_start (struct ev_timer *w)	1340	ev_timer_start (EV_P_ struct ev_timer *w)
706	{	1341	{
707	if (ev_is_active (w))	1342	if (ev_is_active (w))
708	return;	1343	return;
709		1344
710	w->at += now;	1345	((WT)w)->at += mn_now;
711		1346
712	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1347	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
713		1348
714	ev_start ((W)w, ++timercnt);	1349	ev_start (EV_A_ (W)w, ++timercnt);
715	array_needsize (timers, timermax, timercnt, );	1350	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
716	timers [timercnt - 1] = w;	1351	timers [timercnt - 1] = w;
717	upheap ((WT *)timers, timercnt - 1);	1352	upheap ((WT *)timers, timercnt - 1);
718	}
719		1353
		1354	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1355	}
		1356
720	void	1357	void
721	evtimer_stop (struct ev_timer *w)	1358	ev_timer_stop (EV_P_ struct ev_timer *w)
722	{	1359	{
723	ev_clear ((W)w);	1360	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1361	if (!ev_is_active (w))
725	return;	1362	return;
726		1363
		1364	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1365
727	if (w->active < timercnt--)	1366	if (((W)w)->active < timercnt--)
728	{	1367	{
729	timers [w->active - 1] = timers [timercnt];	1368	timers [((W)w)->active - 1] = timers [timercnt];
730	downheap ((WT *)timers, timercnt, w->active - 1);	1369	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1370	}
732		1371
733	w->at = w->repeat;	1372	((WT)w)->at -= mn_now;
734		1373
735	ev_stop ((W)w);	1374	ev_stop (EV_A_ (W)w);
736	}	1375	}
737		1376
738	void	1377	void
739	evtimer_again (struct ev_timer *w)	1378	ev_timer_again (EV_P_ struct ev_timer *w)
740	{	1379	{
741	if (ev_is_active (w))	1380	if (ev_is_active (w))
742	{	1381	{
743	if (w->repeat)	1382	if (w->repeat)
744	{	1383	{
745	w->at = now + w->repeat;	1384	((WT)w)->at = mn_now + w->repeat;
746	downheap ((WT *)timers, timercnt, w->active - 1);	1385	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
747	}	1386	}
748	else	1387	else
749	evtimer_stop (w);	1388	ev_timer_stop (EV_A_ w);
750	}	1389	}
751	else if (w->repeat)	1390	else if (w->repeat)
		1391	{
		1392	w->at = w->repeat;
752	evtimer_start (w);	1393	ev_timer_start (EV_A_ w);
		1394	}
753	}	1395	}
754		1396
		1397	#if EV_PERIODICS
755	void	1398	void
756	evperiodic_start (struct ev_periodic *w)	1399	ev_periodic_start (EV_P_ struct ev_periodic *w)
757	{	1400	{
758	if (ev_is_active (w))	1401	if (ev_is_active (w))
759	return;	1402	return;
760		1403
761	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1404	if (w->reschedule_cb)
762		1405	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1406	else if (w->interval)
		1407	{
		1408	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
763	/* this formula differs from the one in periodic_reify because we do not always round up */	1409	/* this formula differs from the one in periodic_reify because we do not always round up */
764	if (w->interval)
765	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1410	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1411	}
766		1412
767	ev_start ((W)w, ++periodiccnt);	1413	ev_start (EV_A_ (W)w, ++periodiccnt);
768	array_needsize (periodics, periodicmax, periodiccnt, );	1414	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
769	periodics [periodiccnt - 1] = w;	1415	periodics [periodiccnt - 1] = w;
770	upheap ((WT *)periodics, periodiccnt - 1);	1416	upheap ((WT *)periodics, periodiccnt - 1);
771	}
772		1417
		1418	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1419	}
		1420
773	void	1421	void
774	evperiodic_stop (struct ev_periodic *w)	1422	ev_periodic_stop (EV_P_ struct ev_periodic *w)
775	{	1423	{
776	ev_clear ((W)w);	1424	ev_clear_pending (EV_A_ (W)w);
777	if (!ev_is_active (w))	1425	if (!ev_is_active (w))
778	return;	1426	return;
779		1427
		1428	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1429
780	if (w->active < periodiccnt--)	1430	if (((W)w)->active < periodiccnt--)
781	{	1431	{
782	periodics [w->active - 1] = periodics [periodiccnt];	1432	periodics [((W)w)->active - 1] = periodics [periodiccnt];
783	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1433	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
784	}	1434	}
785		1435
786	ev_stop ((W)w);	1436	ev_stop (EV_A_ (W)w);
787	}	1437	}
788		1438
789	void	1439	void
790	evsignal_start (struct ev_signal *w)	1440	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1441	{
		1442	/* TODO: use adjustheap and recalculation */
		1443	ev_periodic_stop (EV_A_ w);
		1444	ev_periodic_start (EV_A_ w);
		1445	}
		1446	#endif
		1447
		1448	void
		1449	ev_idle_start (EV_P_ struct ev_idle *w)
791	{	1450	{
792	if (ev_is_active (w))	1451	if (ev_is_active (w))
793	return;	1452	return;
794		1453
		1454	ev_start (EV_A_ (W)w, ++idlecnt);
		1455	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1456	idles [idlecnt - 1] = w;
		1457	}
		1458
		1459	void
		1460	ev_idle_stop (EV_P_ struct ev_idle *w)
		1461	{
		1462	ev_clear_pending (EV_A_ (W)w);
		1463	if (!ev_is_active (w))
		1464	return;
		1465
		1466	idles [((W)w)->active - 1] = idles [--idlecnt];
		1467	ev_stop (EV_A_ (W)w);
		1468	}
		1469
		1470	void
		1471	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1472	{
		1473	if (ev_is_active (w))
		1474	return;
		1475
		1476	ev_start (EV_A_ (W)w, ++preparecnt);
		1477	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1478	prepares [preparecnt - 1] = w;
		1479	}
		1480
		1481	void
		1482	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1483	{
		1484	ev_clear_pending (EV_A_ (W)w);
		1485	if (!ev_is_active (w))
		1486	return;
		1487
		1488	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1489	ev_stop (EV_A_ (W)w);
		1490	}
		1491
		1492	void
		1493	ev_check_start (EV_P_ struct ev_check *w)
		1494	{
		1495	if (ev_is_active (w))
		1496	return;
		1497
		1498	ev_start (EV_A_ (W)w, ++checkcnt);
		1499	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1500	checks [checkcnt - 1] = w;
		1501	}
		1502
		1503	void
		1504	ev_check_stop (EV_P_ struct ev_check *w)
		1505	{
		1506	ev_clear_pending (EV_A_ (W)w);
		1507	if (!ev_is_active (w))
		1508	return;
		1509
		1510	checks [((W)w)->active - 1] = checks [--checkcnt];
		1511	ev_stop (EV_A_ (W)w);
		1512	}
		1513
		1514	#ifndef SA_RESTART
		1515	# define SA_RESTART 0
		1516	#endif
		1517
		1518	void
		1519	ev_signal_start (EV_P_ struct ev_signal *w)
		1520	{
		1521	#if EV_MULTIPLICITY
		1522	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1523	#endif
		1524	if (ev_is_active (w))
		1525	return;
		1526
		1527	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1528
795	ev_start ((W)w, 1);	1529	ev_start (EV_A_ (W)w, 1);
796	array_needsize (signals, signalmax, w->signum, signals_init);	1530	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
797	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1531	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
798		1532
799	if (!w->next)	1533	if (!((WL)w)->next)
800	{	1534	{
		1535	#if _WIN32
		1536	signal (w->signum, sighandler);
		1537	#else
801	struct sigaction sa;	1538	struct sigaction sa;
802	sa.sa_handler = sighandler;	1539	sa.sa_handler = sighandler;
803	sigfillset (&sa.sa_mask);	1540	sigfillset (&sa.sa_mask);
804	sa.sa_flags = 0;	1541	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
805	sigaction (w->signum, &sa, 0);	1542	sigaction (w->signum, &sa, 0);
		1543	#endif
806	}	1544	}
807	}	1545	}
808		1546
809	void	1547	void
810	evsignal_stop (struct ev_signal *w)	1548	ev_signal_stop (EV_P_ struct ev_signal *w)
811	{	1549	{
812	ev_clear ((W)w);	1550	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1551	if (!ev_is_active (w))
814	return;	1552	return;
815		1553
816	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1554	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
817	ev_stop ((W)w);	1555	ev_stop (EV_A_ (W)w);
818		1556
819	if (!signals [w->signum - 1].head)	1557	if (!signals [w->signum - 1].head)
820	signal (w->signum, SIG_DFL);	1558	signal (w->signum, SIG_DFL);
821	}	1559	}
822		1560
823	void evidle_start (struct ev_idle *w)	1561	void
		1562	ev_child_start (EV_P_ struct ev_child *w)
824	{	1563	{
		1564	#if EV_MULTIPLICITY
		1565	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1566	#endif
825	if (ev_is_active (w))	1567	if (ev_is_active (w))
826	return;	1568	return;
827		1569
828	ev_start ((W)w, ++idlecnt);	1570	ev_start (EV_A_ (W)w, 1);
829	array_needsize (idles, idlemax, idlecnt, );	1571	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
830	idles [idlecnt - 1] = w;
831	}	1572	}
832		1573
833	void evidle_stop (struct ev_idle *w)	1574	void
		1575	ev_child_stop (EV_P_ struct ev_child *w)
834	{	1576	{
835	ev_clear ((W)w);	1577	ev_clear_pending (EV_A_ (W)w);
836	if (ev_is_active (w))	1578	if (!ev_is_active (w))
837	return;	1579	return;
838		1580
839	idles [w->active - 1] = idles [--idlecnt];	1581	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
840	ev_stop ((W)w);	1582	ev_stop (EV_A_ (W)w);
841	}
842
843	void evprepare_start (struct ev_prepare *w)
844	{
845	if (ev_is_active (w))
846	return;
847
848	ev_start ((W)w, ++preparecnt);
849	array_needsize (prepares, preparemax, preparecnt, );
850	prepares [preparecnt - 1] = w;
851	}
852
853	void evprepare_stop (struct ev_prepare *w)
854	{
855	ev_clear ((W)w);
856	if (ev_is_active (w))
857	return;
858
859	prepares [w->active - 1] = prepares [--preparecnt];
860	ev_stop ((W)w);
861	}
862
863	void evcheck_start (struct ev_check *w)
864	{
865	if (ev_is_active (w))
866	return;
867
868	ev_start ((W)w, ++checkcnt);
869	array_needsize (checks, checkmax, checkcnt, );
870	checks [checkcnt - 1] = w;
871	}
872
873	void evcheck_stop (struct ev_check *w)
874	{
875	ev_clear ((W)w);
876	if (ev_is_active (w))
877	return;
878
879	checks [w->active - 1] = checks [--checkcnt];
880	ev_stop ((W)w);
881	}	1583	}
882		1584
883	/*****************************************************************************/	1585	/*****************************************************************************/
884		1586
885	struct ev_once	1587	struct ev_once
…		…
889	void (*cb)(int revents, void *arg);	1591	void (*cb)(int revents, void *arg);
890	void *arg;	1592	void *arg;
891	};	1593	};
892		1594
893	static void	1595	static void
894	once_cb (struct ev_once *once, int revents)	1596	once_cb (EV_P_ struct ev_once *once, int revents)
895	{	1597	{
896	void (*cb)(int revents, void *arg) = once->cb;	1598	void (*cb)(int revents, void *arg) = once->cb;
897	void *arg = once->arg;	1599	void *arg = once->arg;
898		1600
899	evio_stop (&once->io);	1601	ev_io_stop (EV_A_ &once->io);
900	evtimer_stop (&once->to);	1602	ev_timer_stop (EV_A_ &once->to);
901	free (once);	1603	ev_free (once);
902		1604
903	cb (revents, arg);	1605	cb (revents, arg);
904	}	1606	}
905		1607
906	static void	1608	static void
907	once_cb_io (struct ev_io *w, int revents)	1609	once_cb_io (EV_P_ struct ev_io *w, int revents)
908	{	1610	{
909	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1611	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
910	}	1612	}
911		1613
912	static void	1614	static void
913	once_cb_to (struct ev_timer *w, int revents)	1615	once_cb_to (EV_P_ struct ev_timer *w, int revents)
914	{	1616	{
915	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1617	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
916	}	1618	}
917		1619
918	void	1620	void
919	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1621	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
920	{	1622	{
921	struct ev_once *once = malloc (sizeof (struct ev_once));	1623	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
922		1624
923	if (!once)	1625	if (!once)
924	cb (EV_ERROR, arg);	1626	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
925	else	1627	else
926	{	1628	{
927	once->cb = cb;	1629	once->cb = cb;
928	once->arg = arg;	1630	once->arg = arg;
929		1631
930	evw_init (&once->io, once_cb_io);	1632	ev_init (&once->io, once_cb_io);
931
932	if (fd >= 0)	1633	if (fd >= 0)
933	{	1634	{
934	evio_set (&once->io, fd, events);	1635	ev_io_set (&once->io, fd, events);
935	evio_start (&once->io);	1636	ev_io_start (EV_A_ &once->io);
936	}	1637	}
937		1638
938	evw_init (&once->to, once_cb_to);	1639	ev_init (&once->to, once_cb_to);
939
940	if (timeout >= 0.)	1640	if (timeout >= 0.)
941	{	1641	{
942	evtimer_set (&once->to, timeout, 0.);	1642	ev_timer_set (&once->to, timeout, 0.);
943	evtimer_start (&once->to);	1643	ev_timer_start (EV_A_ &once->to);
944	}	1644	}
945	}	1645	}
946	}	1646	}
947		1647
948	/*****************************************************************************/	1648	#ifdef __cplusplus
949
950	#if 0
951
952	struct ev_io wio;
953
954	static void
955	sin_cb (struct ev_io *w, int revents)
956	{
957	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
958	}	1649	}
959
960	static void
961	ocb (struct ev_timer *w, int revents)
962	{
963	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
964	evtimer_stop (w);
965	evtimer_start (w);
966	}
967
968	static void
969	scb (struct ev_signal *w, int revents)
970	{
971	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
972	evio_stop (&wio);
973	evio_start (&wio);
974	}
975
976	static void
977	gcb (struct ev_signal *w, int revents)
978	{
979	fprintf (stderr, "generic %x\n", revents);
980
981	}
982
983	int main (void)
984	{
985	ev_init (0);
986
987	evio_init (&wio, sin_cb, 0, EV_READ);
988	evio_start (&wio);
989
990	struct ev_timer t[10000];
991
992	#if 0
993	int i;
994	for (i = 0; i < 10000; ++i)
995	{
996	struct ev_timer *w = t + i;
997	evw_init (w, ocb, i);
998	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
999	evtimer_start (w);
1000	if (drand48 () < 0.5)
1001	evtimer_stop (w);
1002	}
1003	#endif	1650	#endif
1004		1651
1005	struct ev_timer t1;
1006	evtimer_init (&t1, ocb, 5, 10);
1007	evtimer_start (&t1);
1008
1009	struct ev_signal sig;
1010	evsignal_init (&sig, scb, SIGQUIT);
1011	evsignal_start (&sig);
1012
1013	struct ev_check cw;
1014	evcheck_init (&cw, gcb);
1015	evcheck_start (&cw);
1016
1017	struct ev_idle iw;
1018	evidle_init (&iw, gcb);
1019	evidle_start (&iw);
1020
1021	ev_loop (0);
1022
1023	return 0;
1024	}
1025
1026	#endif
1027
1028
1029
1030

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