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Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.132 by root, Fri Nov 23 10:36:30 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	# else
		47	# ifndef EV_USE_MONOTONIC
		48	# define EV_USE_MONOTONIC 0
		49	# endif
		50	# ifndef EV_USE_REALTIME
		51	# define EV_USE_REALTIME 0
		52	# endif
		53	# endif
		54
		55	# ifndef EV_USE_SELECT
		56	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		57	# define EV_USE_SELECT 1
		58	# else
		59	# define EV_USE_SELECT 0
		60	# endif
		61	# endif
		62
		63	# ifndef EV_USE_POLL
		64	# if HAVE_POLL && HAVE_POLL_H
		65	# define EV_USE_POLL 1
		66	# else
		67	# define EV_USE_POLL 0
		68	# endif
		69	# endif
		70
		71	# ifndef EV_USE_EPOLL
		72	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		73	# define EV_USE_EPOLL 1
		74	# else
		75	# define EV_USE_EPOLL 0
		76	# endif
		77	# endif
		78
		79	# ifndef EV_USE_KQUEUE
		80	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		81	# define EV_USE_KQUEUE 1
		82	# else
		83	# define EV_USE_KQUEUE 0
		84	# endif
		85	# endif
		86
		87	# ifndef EV_USE_PORT
		88	# if HAVE_PORT_H && HAVE_PORT_CREATE
		89	# define EV_USE_PORT 1
		90	# else
		91	# define EV_USE_PORT 0
		92	# endif
		93	# endif
		94
		95	#endif
		96
30	#include <math.h>	97	#include <math.h>
31	#include <stdlib.h>	98	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	99	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	100	#include <stddef.h>
36		101
37	#include <stdio.h>	102	#include <stdio.h>
38		103
39	#include <assert.h>	104	#include <assert.h>
40	#include <errno.h>	105	#include <errno.h>
41	#include <sys/time.h>	106	#include <sys/types.h>
42	#include <time.h>	107	#include <time.h>
43		108
44	#define HAVE_EPOLL 1	109	#include <signal.h>
45		110
46	#ifndef HAVE_MONOTONIC	111	#ifndef _WIN32
47	# ifdef CLOCK_MONOTONIC	112	# include <unistd.h>
48	# define HAVE_MONOTONIC 1	113	# include <sys/time.h>
		114	# include <sys/wait.h>
		115	#else
		116	# define WIN32_LEAN_AND_MEAN
		117	# include <windows.h>
		118	# ifndef EV_SELECT_IS_WINSOCKET
		119	# define EV_SELECT_IS_WINSOCKET 1
49	# endif	120	# endif
50	#endif	121	#endif
51		122
		123	/**/
		124
		125	#ifndef EV_USE_MONOTONIC
		126	# define EV_USE_MONOTONIC 0
		127	#endif
		128
		129	#ifndef EV_USE_REALTIME
		130	# define EV_USE_REALTIME 0
		131	#endif
		132
52	#ifndef HAVE_SELECT	133	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	134	# define EV_USE_SELECT 1
		135	#endif
		136
		137	#ifndef EV_USE_POLL
		138	# ifdef _WIN32
		139	# define EV_USE_POLL 0
		140	# else
		141	# define EV_USE_POLL 1
54	#endif	142	# endif
		143	#endif
55		144
56	#ifndef HAVE_EPOLL	145	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	146	# define EV_USE_EPOLL 0
58	#endif	147	#endif
59		148
		149	#ifndef EV_USE_KQUEUE
		150	# define EV_USE_KQUEUE 0
		151	#endif
		152
		153	#ifndef EV_USE_PORT
		154	# define EV_USE_PORT 0
		155	#endif
		156
		157	/**/
		158
		159	#ifndef CLOCK_MONOTONIC
		160	# undef EV_USE_MONOTONIC
		161	# define EV_USE_MONOTONIC 0
		162	#endif
		163
60	#ifndef HAVE_REALTIME	164	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	165	# undef EV_USE_REALTIME
		166	# define EV_USE_REALTIME 0
62	#endif	167	#endif
		168
		169	#if EV_SELECT_IS_WINSOCKET
		170	# include <winsock.h>
		171	#endif
		172
		173	/**/
63		174
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	175	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	176	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		177	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		178	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
66		179
		180	#ifdef EV_H
		181	# include EV_H
		182	#else
67	#include "ev.h"	183	# include "ev.h"
		184	#endif
		185
		186	#if __GNUC__ >= 3
		187	# define expect(expr,value) __builtin_expect ((expr),(value))
		188	# define inline static inline
		189	#else
		190	# define expect(expr,value) (expr)
		191	# define inline static
		192	#endif
		193
		194	#define expect_false(expr) expect ((expr) != 0, 0)
		195	#define expect_true(expr) expect ((expr) != 0, 1)
		196
		197	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		198	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		199
		200	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		201	#define EMPTY2(a,b) /* used to suppress some warnings */
68		202
69	typedef struct ev_watcher *W;	203	typedef struct ev_watcher *W;
70	typedef struct ev_watcher_list *WL;	204	typedef struct ev_watcher_list *WL;
71	typedef struct ev_watcher_time *WT;	205	typedef struct ev_watcher_time *WT;
72		206
73	static ev_tstamp now, diff; /* monotonic clock */	207	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		208
		209	#ifdef _WIN32
		210	# include "ev_win32.c"
		211	#endif
		212
		213	/*****************************************************************************/
		214
		215	static void (*syserr_cb)(const char *msg);
		216
		217	void ev_set_syserr_cb (void (*cb)(const char *msg))
		218	{
		219	syserr_cb = cb;
		220	}
		221
		222	static void
		223	syserr (const char *msg)
		224	{
		225	if (!msg)
		226	msg = "(libev) system error";
		227
		228	if (syserr_cb)
		229	syserr_cb (msg);
		230	else
		231	{
		232	perror (msg);
		233	abort ();
		234	}
		235	}
		236
		237	static void *(*alloc)(void *ptr, long size);
		238
		239	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		240	{
		241	alloc = cb;
		242	}
		243
		244	static void *
		245	ev_realloc (void *ptr, long size)
		246	{
		247	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		248
		249	if (!ptr && size)
		250	{
		251	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		252	abort ();
		253	}
		254
		255	return ptr;
		256	}
		257
		258	#define ev_malloc(size) ev_realloc (0, (size))
		259	#define ev_free(ptr) ev_realloc ((ptr), 0)
		260
		261	/*****************************************************************************/
		262
		263	typedef struct
		264	{
		265	WL head;
		266	unsigned char events;
		267	unsigned char reify;
		268	#if EV_SELECT_IS_WINSOCKET
		269	SOCKET handle;
		270	#endif
		271	} ANFD;
		272
		273	typedef struct
		274	{
		275	W w;
		276	int events;
		277	} ANPENDING;
		278
		279	#if EV_MULTIPLICITY
		280
		281	struct ev_loop
		282	{
		283	ev_tstamp ev_rt_now;
		284	#define ev_rt_now ((loop)->ev_rt_now)
		285	#define VAR(name,decl) decl;
		286	#include "ev_vars.h"
		287	#undef VAR
		288	};
		289	#include "ev_wrap.h"
		290
		291	static struct ev_loop default_loop_struct;
		292	struct ev_loop *ev_default_loop_ptr;
		293
		294	#else
		295
74	ev_tstamp ev_now;	296	ev_tstamp ev_rt_now;
75	int ev_method;	297	#define VAR(name,decl) static decl;
		298	#include "ev_vars.h"
		299	#undef VAR
76		300
77	static int have_monotonic; /* runtime */	301	static int ev_default_loop_ptr;
78		302
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	303	#endif
80	static void (*method_modify)(int fd, int oev, int nev);
81	static void (*method_poll)(ev_tstamp timeout);
82		304
83	/*****************************************************************************/	305	/*****************************************************************************/
84		306
85	ev_tstamp	307	ev_tstamp
86	ev_time (void)	308	ev_time (void)
87	{	309	{
88	#if HAVE_REALTIME	310	#if EV_USE_REALTIME
89	struct timespec ts;	311	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	312	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	313	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	314	#else
93	struct timeval tv;	315	struct timeval tv;
94	gettimeofday (&tv, 0);	316	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	317	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	318	#endif
97	}	319	}
98		320
99	static ev_tstamp	321	inline ev_tstamp
100	get_clock (void)	322	get_clock (void)
101	{	323	{
102	#if HAVE_MONOTONIC	324	#if EV_USE_MONOTONIC
103	if (have_monotonic)	325	if (expect_true (have_monotonic))
104	{	326	{
105	struct timespec ts;	327	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	328	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	329	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	330	}
109	#endif	331	#endif
110		332
111	return ev_time ();	333	return ev_time ();
112	}	334	}
113		335
		336	#if EV_MULTIPLICITY
		337	ev_tstamp
		338	ev_now (EV_P)
		339	{
		340	return ev_rt_now;
		341	}
		342	#endif
		343
		344	#define array_roundsize(type,n) (((n) | 4) & ~3)
		345
114	#define array_needsize(base,cur,cnt,init) \	346	#define array_needsize(type,base,cur,cnt,init) \
115	if ((cnt) > cur) \	347	if (expect_false ((cnt) > cur)) \
116	{ \	348	{ \
117	int newcnt = cur ? cur << 1 : 16; \	349	int newcnt = cur; \
		350	do \
		351	{ \
		352	newcnt = array_roundsize (type, newcnt << 1); \
		353	} \
		354	while ((cnt) > newcnt); \
		355	\
118	base = realloc (base, sizeof (*base) * (newcnt)); \	356	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
119	init (base + cur, newcnt - cur); \	357	init (base + cur, newcnt - cur); \
120	cur = newcnt; \	358	cur = newcnt; \
121	}	359	}
		360
		361	#define array_slim(type,stem) \
		362	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		363	{ \
		364	stem ## max = array_roundsize (stem ## cnt >> 1); \
		365	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		366	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		367	}
		368
		369	#define array_free(stem, idx) \
		370	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
122		371
123	/*****************************************************************************/	372	/*****************************************************************************/
124		373
125	typedef struct
126	{
127	struct ev_io *head;
128	unsigned char wev, rev; /* want, received event set */
129	} ANFD;
130
131	static ANFD *anfds;
132	static int anfdmax;
133
134	static int *fdchanges;
135	static int fdchangemax, fdchangecnt;
136
137	static void	374	static void
138	anfds_init (ANFD *base, int count)	375	anfds_init (ANFD *base, int count)
139	{	376	{
140	while (count--)	377	while (count--)
141	{	378	{
142	base->head = 0;	379	base->head = 0;
143	base->wev = base->rev = EV_NONE;	380	base->events = EV_NONE;
		381	base->reify = 0;
		382
144	++base;	383	++base;
145	}	384	}
146	}	385	}
147		386
148	typedef struct	387	void
		388	ev_feed_event (EV_P_ void *w, int revents)
149	{	389	{
150	W w;	390	W w_ = (W)w;
151	int events;
152	} ANPENDING;
153		391
154	static ANPENDING *pendings;	392	if (expect_false (w_->pending))
155	static int pendingmax, pendingcnt;
156
157	static void
158	event (W w, int events)
159	{
160	if (w->active)
161	{	393	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	394	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		395	return;
166	}	396	}
167	}
168		397
		398	w_->pending = ++pendingcnt [ABSPRI (w_)];
		399	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		400	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		401	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		402	}
		403
169	static void	404	static void
		405	queue_events (EV_P_ W *events, int eventcnt, int type)
		406	{
		407	int i;
		408
		409	for (i = 0; i < eventcnt; ++i)
		410	ev_feed_event (EV_A_ events [i], type);
		411	}
		412
		413	inline void
170	fd_event (int fd, int events)	414	fd_event (EV_P_ int fd, int revents)
171	{	415	{
172	ANFD *anfd = anfds + fd;	416	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	417	struct ev_io *w;
174		418
175	for (w = anfd->head; w; w = w->next)	419	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
176	{	420	{
177	int ev = w->events & events;	421	int ev = w->events & revents;
178		422
179	if (ev)	423	if (ev)
180	event ((W)w, ev);	424	ev_feed_event (EV_A_ (W)w, ev);
181	}	425	}
182	}	426	}
183		427
184	static void	428	void
185	queue_events (W *events, int eventcnt, int type)	429	ev_feed_fd_event (EV_P_ int fd, int revents)
186	{	430	{
187	int i;	431	fd_event (EV_A_ fd, revents);
188
189	for (i = 0; i < eventcnt; ++i)
190	event (events [i], type);
191	}	432	}
192		433
193	/*****************************************************************************/	434	/*****************************************************************************/
194		435
195	static struct ev_timer **timers;	436	inline void
196	static int timermax, timercnt;	437	fd_reify (EV_P)
197
198	static struct ev_periodic **periodics;
199	static int periodicmax, periodiccnt;
200
201	static void
202	upheap (WT *timers, int k)
203	{
204	WT w = timers [k];
205
206	while (k && timers [k >> 1]->at > w->at)
207	{
208	timers [k] = timers [k >> 1];
209	timers [k]->active = k + 1;
210	k >>= 1;
211	}
212
213	timers [k] = w;
214	timers [k]->active = k + 1;
215
216	}
217
218	static void
219	downheap (WT *timers, int N, int k)
220	{
221	WT w = timers [k];
222
223	while (k < (N >> 1))
224	{
225	int j = k << 1;
226
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
228	++j;
229
230	if (w->at <= timers [j]->at)
231	break;
232
233	timers [k] = timers [j];
234	timers [k]->active = k + 1;
235	k = j;
236	}
237
238	timers [k] = w;
239	timers [k]->active = k + 1;
240	}
241
242	/*****************************************************************************/
243
244	typedef struct
245	{
246	struct ev_signal *head;
247	sig_atomic_t gotsig;
248	} ANSIG;
249
250	static ANSIG *signals;
251	static int signalmax;
252
253	static int sigpipe [2];
254	static sig_atomic_t gotsig;
255	static struct ev_io sigev;
256
257	static void
258	signals_init (ANSIG *base, int count)
259	{
260	while (count--)
261	{
262	base->head = 0;
263	base->gotsig = 0;
264	++base;
265	}
266	}
267
268	static void
269	sighandler (int signum)
270	{
271	signals [signum - 1].gotsig = 1;
272
273	if (!gotsig)
274	{
275	gotsig = 1;
276	write (sigpipe [1], &gotsig, 1);
277	}
278	}
279
280	static void
281	sigcb (struct ev_io *iow, int revents)
282	{
283	struct ev_signal *w;
284	int sig;
285
286	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288
289	for (sig = signalmax; sig--; )
290	if (signals [sig].gotsig)
291	{
292	signals [sig].gotsig = 0;
293
294	for (w = signals [sig].head; w; w = w->next)
295	event ((W)w, EV_SIGNAL);
296	}
297	}
298
299	static void
300	siginit (void)
301	{
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304
305	/* rather than sort out wether we really need nb, set it */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
308
309	evio_set (&sigev, sigpipe [0], EV_READ);
310	evio_start (&sigev);
311	}
312
313	/*****************************************************************************/
314
315	static struct ev_idle **idles;
316	static int idlemax, idlecnt;
317
318	static struct ev_check **checks;
319	static int checkmax, checkcnt;
320
321	/*****************************************************************************/
322
323	#if HAVE_EPOLL
324	# include "ev_epoll.c"
325	#endif
326	#if HAVE_SELECT
327	# include "ev_select.c"
328	#endif
329
330	int ev_init (int flags)
331	{
332	#if HAVE_MONOTONIC
333	{
334	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;
337	}
338	#endif
339
340	ev_now = ev_time ();
341	now = get_clock ();
342	diff = ev_now - now;
343
344	if (pipe (sigpipe))
345	return 0;
346
347	ev_method = EVMETHOD_NONE;
348	#if HAVE_EPOLL
349	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
350	#endif
351	#if HAVE_SELECT
352	if (ev_method == EVMETHOD_NONE) select_init (flags);
353	#endif
354
355	if (ev_method)
356	{
357	evw_init (&sigev, sigcb);
358	siginit ();
359	}
360
361	return ev_method;
362	}
363
364	/*****************************************************************************/
365
366	void ev_prefork (void)
367	{
368	/* nop */
369	}
370
371	void ev_postfork_parent (void)
372	{
373	/* nop */
374	}
375
376	void ev_postfork_child (void)
377	{
378	#if HAVE_EPOLL
379	if (ev_method == EVMETHOD_EPOLL)
380	epoll_postfork_child ();
381	#endif
382
383	evio_stop (&sigev);
384	close (sigpipe [0]);
385	close (sigpipe [1]);
386	pipe (sigpipe);
387	siginit ();
388	}
389
390	/*****************************************************************************/
391
392	static void
393	fd_reify (void)
394	{	438	{
395	int i;	439	int i;
396		440
397	for (i = 0; i < fdchangecnt; ++i)	441	for (i = 0; i < fdchangecnt; ++i)
398	{	442	{
399	int fd = fdchanges [i];	443	int fd = fdchanges [i];
400	ANFD *anfd = anfds + fd;	444	ANFD *anfd = anfds + fd;
401	struct ev_io *w;	445	struct ev_io *w;
402		446
403	int wev = 0;	447	int events = 0;
404		448
405	for (w = anfd->head; w; w = w->next)	449	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
406	wev |= w->events;	450	events |= w->events;
407		451
408	if (anfd->wev != wev)	452	#if EV_SELECT_IS_WINSOCKET
		453	if (events)
409	{	454	{
410	method_modify (fd, anfd->wev, wev);	455	unsigned long argp;
411	anfd->wev = wev;	456	anfd->handle = _get_osfhandle (fd);
		457	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
412	}	458	}
		459	#endif
		460
		461	anfd->reify = 0;
		462
		463	backend_modify (EV_A_ fd, anfd->events, events);
		464	anfd->events = events;
413	}	465	}
414		466
415	fdchangecnt = 0;	467	fdchangecnt = 0;
416	}	468	}
417		469
418	static void	470	static void
419	call_pending ()	471	fd_change (EV_P_ int fd)
		472	{
		473	if (expect_false (anfds [fd].reify))
		474	return;
		475
		476	anfds [fd].reify = 1;
		477
		478	++fdchangecnt;
		479	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		480	fdchanges [fdchangecnt - 1] = fd;
		481	}
		482
		483	static void
		484	fd_kill (EV_P_ int fd)
		485	{
		486	struct ev_io *w;
		487
		488	while ((w = (struct ev_io *)anfds [fd].head))
		489	{
		490	ev_io_stop (EV_A_ w);
		491	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		492	}
		493	}
		494
		495	inline int
		496	fd_valid (int fd)
		497	{
		498	#ifdef _WIN32
		499	return _get_osfhandle (fd) != -1;
		500	#else
		501	return fcntl (fd, F_GETFD) != -1;
		502	#endif
		503	}
		504
		505	/* called on EBADF to verify fds */
		506	static void
		507	fd_ebadf (EV_P)
		508	{
		509	int fd;
		510
		511	for (fd = 0; fd < anfdmax; ++fd)
		512	if (anfds [fd].events)
		513	if (!fd_valid (fd) == -1 && errno == EBADF)
		514	fd_kill (EV_A_ fd);
		515	}
		516
		517	/* called on ENOMEM in select/poll to kill some fds and retry */
		518	static void
		519	fd_enomem (EV_P)
		520	{
		521	int fd;
		522
		523	for (fd = anfdmax; fd--; )
		524	if (anfds [fd].events)
		525	{
		526	fd_kill (EV_A_ fd);
		527	return;
		528	}
		529	}
		530
		531	/* usually called after fork if backend needs to re-arm all fds from scratch */
		532	static void
		533	fd_rearm_all (EV_P)
		534	{
		535	int fd;
		536
		537	/* this should be highly optimised to not do anything but set a flag */
		538	for (fd = 0; fd < anfdmax; ++fd)
		539	if (anfds [fd].events)
		540	{
		541	anfds [fd].events = 0;
		542	fd_change (EV_A_ fd);
		543	}
		544	}
		545
		546	/*****************************************************************************/
		547
		548	static void
		549	upheap (WT *heap, int k)
		550	{
		551	WT w = heap [k];
		552
		553	while (k && heap [k >> 1]->at > w->at)
		554	{
		555	heap [k] = heap [k >> 1];
		556	((W)heap [k])->active = k + 1;
		557	k >>= 1;
		558	}
		559
		560	heap [k] = w;
		561	((W)heap [k])->active = k + 1;
		562
		563	}
		564
		565	static void
		566	downheap (WT *heap, int N, int k)
		567	{
		568	WT w = heap [k];
		569
		570	while (k < (N >> 1))
		571	{
		572	int j = k << 1;
		573
		574	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		575	++j;
		576
		577	if (w->at <= heap [j]->at)
		578	break;
		579
		580	heap [k] = heap [j];
		581	((W)heap [k])->active = k + 1;
		582	k = j;
		583	}
		584
		585	heap [k] = w;
		586	((W)heap [k])->active = k + 1;
		587	}
		588
		589	inline void
		590	adjustheap (WT *heap, int N, int k)
		591	{
		592	upheap (heap, k);
		593	downheap (heap, N, k);
		594	}
		595
		596	/*****************************************************************************/
		597
		598	typedef struct
		599	{
		600	WL head;
		601	sig_atomic_t volatile gotsig;
		602	} ANSIG;
		603
		604	static ANSIG *signals;
		605	static int signalmax;
		606
		607	static int sigpipe [2];
		608	static sig_atomic_t volatile gotsig;
		609	static struct ev_io sigev;
		610
		611	static void
		612	signals_init (ANSIG *base, int count)
		613	{
		614	while (count--)
		615	{
		616	base->head = 0;
		617	base->gotsig = 0;
		618
		619	++base;
		620	}
		621	}
		622
		623	static void
		624	sighandler (int signum)
		625	{
		626	#if _WIN32
		627	signal (signum, sighandler);
		628	#endif
		629
		630	signals [signum - 1].gotsig = 1;
		631
		632	if (!gotsig)
		633	{
		634	int old_errno = errno;
		635	gotsig = 1;
		636	write (sigpipe [1], &signum, 1);
		637	errno = old_errno;
		638	}
		639	}
		640
		641	void
		642	ev_feed_signal_event (EV_P_ int signum)
		643	{
		644	WL w;
		645
		646	#if EV_MULTIPLICITY
		647	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		648	#endif
		649
		650	--signum;
		651
		652	if (signum < 0 || signum >= signalmax)
		653	return;
		654
		655	signals [signum].gotsig = 0;
		656
		657	for (w = signals [signum].head; w; w = w->next)
		658	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		659	}
		660
		661	static void
		662	sigcb (EV_P_ struct ev_io *iow, int revents)
		663	{
		664	int signum;
		665
		666	read (sigpipe [0], &revents, 1);
		667	gotsig = 0;
		668
		669	for (signum = signalmax; signum--; )
		670	if (signals [signum].gotsig)
		671	ev_feed_signal_event (EV_A_ signum + 1);
		672	}
		673
		674	static void
		675	fd_intern (int fd)
		676	{
		677	#ifdef _WIN32
		678	int arg = 1;
		679	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		680	#else
		681	fcntl (fd, F_SETFD, FD_CLOEXEC);
		682	fcntl (fd, F_SETFL, O_NONBLOCK);
		683	#endif
		684	}
		685
		686	static void
		687	siginit (EV_P)
		688	{
		689	fd_intern (sigpipe [0]);
		690	fd_intern (sigpipe [1]);
		691
		692	ev_io_set (&sigev, sigpipe [0], EV_READ);
		693	ev_io_start (EV_A_ &sigev);
		694	ev_unref (EV_A); /* child watcher should not keep loop alive */
		695	}
		696
		697	/*****************************************************************************/
		698
		699	static struct ev_child *childs [PID_HASHSIZE];
		700
		701	#ifndef _WIN32
		702
		703	static struct ev_signal childev;
		704
		705	#ifndef WCONTINUED
		706	# define WCONTINUED 0
		707	#endif
		708
		709	static void
		710	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		711	{
		712	struct ev_child *w;
		713
		714	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		715	if (w->pid == pid || !w->pid)
		716	{
		717	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		718	w->rpid = pid;
		719	w->rstatus = status;
		720	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		721	}
		722	}
		723
		724	static void
		725	childcb (EV_P_ struct ev_signal *sw, int revents)
		726	{
		727	int pid, status;
		728
		729	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		730	{
		731	/* make sure we are called again until all childs have been reaped */
		732	/* we need to do it this way so that the callback gets called before we continue */
		733	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		734
		735	child_reap (EV_A_ sw, pid, pid, status);
		736	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		737	}
		738	}
		739
		740	#endif
		741
		742	/*****************************************************************************/
		743
		744	#if EV_USE_PORT
		745	# include "ev_port.c"
		746	#endif
		747	#if EV_USE_KQUEUE
		748	# include "ev_kqueue.c"
		749	#endif
		750	#if EV_USE_EPOLL
		751	# include "ev_epoll.c"
		752	#endif
		753	#if EV_USE_POLL
		754	# include "ev_poll.c"
		755	#endif
		756	#if EV_USE_SELECT
		757	# include "ev_select.c"
		758	#endif
		759
		760	int
		761	ev_version_major (void)
		762	{
		763	return EV_VERSION_MAJOR;
		764	}
		765
		766	int
		767	ev_version_minor (void)
		768	{
		769	return EV_VERSION_MINOR;
		770	}
		771
		772	/* return true if we are running with elevated privileges and should ignore env variables */
		773	static int
		774	enable_secure (void)
		775	{
		776	#ifdef _WIN32
		777	return 0;
		778	#else
		779	return getuid () != geteuid ()
		780	|| getgid () != getegid ();
		781	#endif
		782	}
		783
		784	unsigned int
		785	ev_supported_backends (void)
		786	{
		787	unsigned int flags = 0;
		788
		789	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		790	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		791	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		792	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		793	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		794
		795	return flags;
		796	}
		797
		798	unsigned int
		799	ev_recommended_backends (void)
		800	{
		801	unsigned int flags = ev_supported_backends ();
		802
		803	#ifndef __NetBSD__
		804	/* kqueue is borked on everything but netbsd apparently */
		805	/* it usually doesn't work correctly on anything but sockets and pipes */
		806	flags &= ~EVBACKEND_KQUEUE;
		807	#endif
		808	#ifdef __APPLE__
		809	// flags &= ~EVBACKEND_KQUEUE; for documentation
		810	flags &= ~EVBACKEND_POLL;
		811	#endif
		812
		813	return flags;
		814	}
		815
		816	unsigned int
		817	ev_backend (EV_P)
		818	{
		819	return backend;
		820	}
		821
		822	static void
		823	loop_init (EV_P_ unsigned int flags)
		824	{
		825	if (!backend)
		826	{
		827	#if EV_USE_MONOTONIC
		828	{
		829	struct timespec ts;
		830	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		831	have_monotonic = 1;
		832	}
		833	#endif
		834
		835	ev_rt_now = ev_time ();
		836	mn_now = get_clock ();
		837	now_floor = mn_now;
		838	rtmn_diff = ev_rt_now - mn_now;
		839
		840	if (!(flags & EVFLAG_NOENV)
		841	&& !enable_secure ()
		842	&& getenv ("LIBEV_FLAGS"))
		843	flags = atoi (getenv ("LIBEV_FLAGS"));
		844
		845	if (!(flags & 0x0000ffffUL))
		846	flags |= ev_recommended_backends ();
		847
		848	backend = 0;
		849	#if EV_USE_PORT
		850	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		851	#endif
		852	#if EV_USE_KQUEUE
		853	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		854	#endif
		855	#if EV_USE_EPOLL
		856	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		857	#endif
		858	#if EV_USE_POLL
		859	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		860	#endif
		861	#if EV_USE_SELECT
		862	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		863	#endif
		864
		865	ev_init (&sigev, sigcb);
		866	ev_set_priority (&sigev, EV_MAXPRI);
		867	}
		868	}
		869
		870	static void
		871	loop_destroy (EV_P)
420	{	872	{
421	int i;	873	int i;
422		874
423	for (i = 0; i < pendingcnt; ++i)	875	#if EV_USE_PORT
		876	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		877	#endif
		878	#if EV_USE_KQUEUE
		879	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		880	#endif
		881	#if EV_USE_EPOLL
		882	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		883	#endif
		884	#if EV_USE_POLL
		885	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		886	#endif
		887	#if EV_USE_SELECT
		888	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		889	#endif
		890
		891	for (i = NUMPRI; i--; )
		892	array_free (pending, [i]);
		893
		894	/* have to use the microsoft-never-gets-it-right macro */
		895	array_free (fdchange, EMPTY0);
		896	array_free (timer, EMPTY0);
		897	#if EV_PERIODICS
		898	array_free (periodic, EMPTY0);
		899	#endif
		900	array_free (idle, EMPTY0);
		901	array_free (prepare, EMPTY0);
		902	array_free (check, EMPTY0);
		903
		904	backend = 0;
		905	}
		906
		907	static void
		908	loop_fork (EV_P)
		909	{
		910	#if EV_USE_PORT
		911	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		912	#endif
		913	#if EV_USE_KQUEUE
		914	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		915	#endif
		916	#if EV_USE_EPOLL
		917	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		918	#endif
		919
		920	if (ev_is_active (&sigev))
		921	{
		922	/* default loop */
		923
		924	ev_ref (EV_A);
		925	ev_io_stop (EV_A_ &sigev);
		926	close (sigpipe [0]);
		927	close (sigpipe [1]);
		928
		929	while (pipe (sigpipe))
		930	syserr ("(libev) error creating pipe");
		931
		932	siginit (EV_A);
424	{	933	}
425	ANPENDING *p = pendings + i;
426		934
427	if (p->w)	935	postfork = 0;
		936	}
		937
		938	#if EV_MULTIPLICITY
		939	struct ev_loop *
		940	ev_loop_new (unsigned int flags)
		941	{
		942	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		943
		944	memset (loop, 0, sizeof (struct ev_loop));
		945
		946	loop_init (EV_A_ flags);
		947
		948	if (ev_backend (EV_A))
		949	return loop;
		950
		951	return 0;
		952	}
		953
		954	void
		955	ev_loop_destroy (EV_P)
		956	{
		957	loop_destroy (EV_A);
		958	ev_free (loop);
		959	}
		960
		961	void
		962	ev_loop_fork (EV_P)
		963	{
		964	postfork = 1;
		965	}
		966
		967	#endif
		968
		969	#if EV_MULTIPLICITY
		970	struct ev_loop *
		971	ev_default_loop_init (unsigned int flags)
		972	#else
		973	int
		974	ev_default_loop (unsigned int flags)
		975	#endif
		976	{
		977	if (sigpipe [0] == sigpipe [1])
		978	if (pipe (sigpipe))
		979	return 0;
		980
		981	if (!ev_default_loop_ptr)
		982	{
		983	#if EV_MULTIPLICITY
		984	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		985	#else
		986	ev_default_loop_ptr = 1;
		987	#endif
		988
		989	loop_init (EV_A_ flags);
		990
		991	if (ev_backend (EV_A))
428	{	992	{
429	p->w->pending = 0;	993	siginit (EV_A);
430	p->w->cb (p->w, p->events);	994
		995	#ifndef _WIN32
		996	ev_signal_init (&childev, childcb, SIGCHLD);
		997	ev_set_priority (&childev, EV_MAXPRI);
		998	ev_signal_start (EV_A_ &childev);
		999	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1000	#endif
431	}	1001	}
		1002	else
		1003	ev_default_loop_ptr = 0;
		1004	}
		1005
		1006	return ev_default_loop_ptr;
		1007	}
		1008
		1009	void
		1010	ev_default_destroy (void)
		1011	{
		1012	#if EV_MULTIPLICITY
		1013	struct ev_loop *loop = ev_default_loop_ptr;
		1014	#endif
		1015
		1016	#ifndef _WIN32
		1017	ev_ref (EV_A); /* child watcher */
		1018	ev_signal_stop (EV_A_ &childev);
		1019	#endif
		1020
		1021	ev_ref (EV_A); /* signal watcher */
		1022	ev_io_stop (EV_A_ &sigev);
		1023
		1024	close (sigpipe [0]); sigpipe [0] = 0;
		1025	close (sigpipe [1]); sigpipe [1] = 0;
		1026
		1027	loop_destroy (EV_A);
		1028	}
		1029
		1030	void
		1031	ev_default_fork (void)
		1032	{
		1033	#if EV_MULTIPLICITY
		1034	struct ev_loop *loop = ev_default_loop_ptr;
		1035	#endif
		1036
		1037	if (backend)
		1038	postfork = 1;
		1039	}
		1040
		1041	/*****************************************************************************/
		1042
		1043	static int
		1044	any_pending (EV_P)
		1045	{
		1046	int pri;
		1047
		1048	for (pri = NUMPRI; pri--; )
		1049	if (pendingcnt [pri])
		1050	return 1;
		1051
		1052	return 0;
		1053	}
		1054
		1055	inline void
		1056	call_pending (EV_P)
		1057	{
		1058	int pri;
		1059
		1060	for (pri = NUMPRI; pri--; )
		1061	while (pendingcnt [pri])
		1062	{
		1063	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1064
		1065	if (expect_true (p->w))
		1066	{
		1067	p->w->pending = 0;
		1068	EV_CB_INVOKE (p->w, p->events);
		1069	}
432	}	1070	}
433
434	pendingcnt = 0;
435	}	1071	}
436		1072
437	static void	1073	inline void
438	timers_reify ()	1074	timers_reify (EV_P)
439	{	1075	{
440	while (timercnt && timers [0]->at <= now)	1076	while (timercnt && ((WT)timers [0])->at <= mn_now)
441	{	1077	{
442	struct ev_timer *w = timers [0];	1078	struct ev_timer *w = timers [0];
443		1079
444	event ((W)w, EV_TIMEOUT);	1080	assert (("inactive timer on timer heap detected", ev_is_active (w)));
445		1081
446	/* first reschedule or stop timer */	1082	/* first reschedule or stop timer */
447	if (w->repeat)	1083	if (w->repeat)
448	{	1084	{
		1085	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1086
449	w->at = now + w->repeat;	1087	((WT)w)->at += w->repeat;
450	assert (("timer timeout in the past, negative repeat?", w->at > now));	1088	if (((WT)w)->at < mn_now)
		1089	((WT)w)->at = mn_now;
		1090
451	downheap ((WT *)timers, timercnt, 0);	1091	downheap ((WT *)timers, timercnt, 0);
452	}	1092	}
453	else	1093	else
454	evtimer_stop (w); /* nonrepeating: stop timer */	1094	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
455	}
456	}
457		1095
458	static void	1096	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1097	}
		1098	}
		1099
		1100	#if EV_PERIODICS
		1101	inline void
459	periodics_reify ()	1102	periodics_reify (EV_P)
460	{	1103	{
461	while (periodiccnt && periodics [0]->at <= ev_now)	1104	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
462	{	1105	{
463	struct ev_periodic *w = periodics [0];	1106	struct ev_periodic *w = periodics [0];
464		1107
		1108	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1109
465	/* first reschedule or stop timer */	1110	/* first reschedule or stop timer */
466	if (w->interval)	1111	if (w->reschedule_cb)
467	{	1112	{
		1113	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1114	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1115	downheap ((WT *)periodics, periodiccnt, 0);
		1116	}
		1117	else if (w->interval)
		1118	{
468	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1119	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
469	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1120	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
470	downheap ((WT *)periodics, periodiccnt, 0);	1121	downheap ((WT *)periodics, periodiccnt, 0);
471	}	1122	}
472	else	1123	else
473	evperiodic_stop (w); /* nonrepeating: stop timer */	1124	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
474		1125
475	event ((W)w, EV_TIMEOUT);	1126	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
476	}	1127	}
477	}	1128	}
478		1129
479	static void	1130	static void
480	periodics_reschedule (ev_tstamp diff)	1131	periodics_reschedule (EV_P)
481	{	1132	{
482	int i;	1133	int i;
483		1134
484	/* adjust periodics after time jump */	1135	/* adjust periodics after time jump */
485	for (i = 0; i < periodiccnt; ++i)	1136	for (i = 0; i < periodiccnt; ++i)
486	{	1137	{
487	struct ev_periodic *w = periodics [i];	1138	struct ev_periodic *w = periodics [i];
488		1139
		1140	if (w->reschedule_cb)
		1141	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
489	if (w->interval)	1142	else if (w->interval)
		1143	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1144	}
		1145
		1146	/* now rebuild the heap */
		1147	for (i = periodiccnt >> 1; i--; )
		1148	downheap ((WT *)periodics, periodiccnt, i);
		1149	}
		1150	#endif
		1151
		1152	inline int
		1153	time_update_monotonic (EV_P)
		1154	{
		1155	mn_now = get_clock ();
		1156
		1157	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1158	{
		1159	ev_rt_now = rtmn_diff + mn_now;
		1160	return 0;
		1161	}
		1162	else
		1163	{
		1164	now_floor = mn_now;
		1165	ev_rt_now = ev_time ();
		1166	return 1;
		1167	}
		1168	}
		1169
		1170	inline void
		1171	time_update (EV_P)
		1172	{
		1173	int i;
		1174
		1175	#if EV_USE_MONOTONIC
		1176	if (expect_true (have_monotonic))
		1177	{
		1178	if (time_update_monotonic (EV_A))
490	{	1179	{
491	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1180	ev_tstamp odiff = rtmn_diff;
492		1181
493	if (fabs (diff) >= 1e-4)	1182	for (i = 4; --i; ) /* loop a few times, before making important decisions */
494	{	1183	{
495	evperiodic_stop (w);	1184	rtmn_diff = ev_rt_now - mn_now;
496	evperiodic_start (w);
497		1185
498	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1186	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1187	return; /* all is well */
		1188
		1189	ev_rt_now = ev_time ();
		1190	mn_now = get_clock ();
		1191	now_floor = mn_now;
499	}	1192	}
		1193
		1194	# if EV_PERIODICS
		1195	periodics_reschedule (EV_A);
		1196	# endif
		1197	/* no timer adjustment, as the monotonic clock doesn't jump */
		1198	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
500	}	1199	}
501	}	1200	}
502	}	1201	else
503		1202	#endif
504	static void	1203	{
505	time_update ()
506	{
507	int i;
508
509	ev_now = ev_time ();	1204	ev_rt_now = ev_time ();
510		1205
511	if (have_monotonic)	1206	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
512	{
513	ev_tstamp odiff = diff;
514
515	for (i = 4; --i; ) /* loop a few times, before making important decisions */
516	{	1207	{
517	now = get_clock ();	1208	#if EV_PERIODICS
518	diff = ev_now - now;
519
520	if (fabs (odiff - diff) < MIN_TIMEJUMP)
521	return; /* all is well */
522
523	ev_now = ev_time ();
524	}
525
526	periodics_reschedule (diff - odiff);
527	/* no timer adjustment, as the monotonic clock doesn't jump */
528	}
529	else
530	{
531	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
532	{
533	periodics_reschedule (ev_now - now);	1209	periodics_reschedule (EV_A);
		1210	#endif
534		1211
535	/* adjust timers. this is easy, as the offset is the same for all */	1212	/* adjust timers. this is easy, as the offset is the same for all */
536	for (i = 0; i < timercnt; ++i)	1213	for (i = 0; i < timercnt; ++i)
537	timers [i]->at += diff;	1214	((WT)timers [i])->at += ev_rt_now - mn_now;
538	}	1215	}
539		1216
540	now = ev_now;	1217	mn_now = ev_rt_now;
541	}	1218	}
542	}	1219	}
543		1220
544	int ev_loop_done;	1221	void
		1222	ev_ref (EV_P)
		1223	{
		1224	++activecnt;
		1225	}
545		1226
		1227	void
		1228	ev_unref (EV_P)
		1229	{
		1230	--activecnt;
		1231	}
		1232
		1233	static int loop_done;
		1234
		1235	void
546	void ev_loop (int flags)	1236	ev_loop (EV_P_ int flags)
547	{	1237	{
548	double block;	1238	double block;
549	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1239	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
550		1240
551	if (checkcnt)	1241	while (activecnt)
552	{	1242	{
553	queue_events ((W *)checks, checkcnt, EV_CHECK);	1243	/* queue check watchers (and execute them) */
		1244	if (expect_false (preparecnt))
		1245	{
		1246	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
554	call_pending ();	1247	call_pending (EV_A);
555	}	1248	}
556		1249
557	do	1250	/* we might have forked, so reify kernel state if necessary */
558	{	1251	if (expect_false (postfork))
		1252	loop_fork (EV_A);
		1253
559	/* update fd-related kernel structures */	1254	/* update fd-related kernel structures */
560	fd_reify ();	1255	fd_reify (EV_A);
561		1256
562	/* calculate blocking time */	1257	/* calculate blocking time */
563		1258
564	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1259	/* we only need this for !monotonic clock or timers, but as we basically
		1260	always have timers, we just calculate it always */
		1261	#if EV_USE_MONOTONIC
		1262	if (expect_true (have_monotonic))
		1263	time_update_monotonic (EV_A);
		1264	else
		1265	#endif
		1266	{
565	ev_now = ev_time ();	1267	ev_rt_now = ev_time ();
		1268	mn_now = ev_rt_now;
		1269	}
566		1270
567	if (flags & EVLOOP_NONBLOCK || idlecnt)	1271	if (flags & EVLOOP_NONBLOCK || idlecnt)
568	block = 0.;	1272	block = 0.;
569	else	1273	else
570	{	1274	{
571	block = MAX_BLOCKTIME;	1275	block = MAX_BLOCKTIME;
572		1276
573	if (timercnt)	1277	if (timercnt)
574	{	1278	{
575	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1279	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
576	if (block > to) block = to;	1280	if (block > to) block = to;
577	}	1281	}
578		1282
		1283	#if EV_PERIODICS
579	if (periodiccnt)	1284	if (periodiccnt)
580	{	1285	{
581	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1286	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
582	if (block > to) block = to;	1287	if (block > to) block = to;
583	}	1288	}
		1289	#endif
584		1290
585	if (block < 0.) block = 0.;	1291	if (expect_false (block < 0.)) block = 0.;
586	}	1292	}
587		1293
588	method_poll (block);	1294	backend_poll (EV_A_ block);
589		1295
590	/* update ev_now, do magic */	1296	/* update ev_rt_now, do magic */
591	time_update ();	1297	time_update (EV_A);
592		1298
593	/* queue pending timers and reschedule them */	1299	/* queue pending timers and reschedule them */
		1300	timers_reify (EV_A); /* relative timers called last */
		1301	#if EV_PERIODICS
594	periodics_reify (); /* absolute timers first */	1302	periodics_reify (EV_A); /* absolute timers called first */
595	timers_reify (); /* relative timers second */	1303	#endif
596		1304
597	/* queue idle watchers unless io or timers are pending */	1305	/* queue idle watchers unless io or timers are pending */
598	if (!pendingcnt)	1306	if (idlecnt && !any_pending (EV_A))
599	queue_events ((W *)idles, idlecnt, EV_IDLE);	1307	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
600		1308
601	/* queue check and possibly idle watchers */	1309	/* queue check watchers, to be executed first */
		1310	if (expect_false (checkcnt))
602	queue_events ((W *)checks, checkcnt, EV_CHECK);	1311	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
603		1312
604	call_pending ();	1313	call_pending (EV_A);
605	}
606	while (!ev_loop_done);
607		1314
		1315	if (expect_false (loop_done))
		1316	break;
		1317	}
		1318
608	if (ev_loop_done != 2)	1319	if (loop_done != 2)
609	ev_loop_done = 0;	1320	loop_done = 0;
		1321	}
		1322
		1323	void
		1324	ev_unloop (EV_P_ int how)
		1325	{
		1326	loop_done = how;
610	}	1327	}
611		1328
612	/*****************************************************************************/	1329	/*****************************************************************************/
613		1330
614	static void	1331	inline void
615	wlist_add (WL *head, WL elem)	1332	wlist_add (WL *head, WL elem)
616	{	1333	{
617	elem->next = *head;	1334	elem->next = *head;
618	*head = elem;	1335	*head = elem;
619	}	1336	}
620		1337
621	static void	1338	inline void
622	wlist_del (WL *head, WL elem)	1339	wlist_del (WL *head, WL elem)
623	{	1340	{
624	while (*head)	1341	while (*head)
625	{	1342	{
626	if (*head == elem)	1343	if (*head == elem)
…		…
631		1348
632	head = &(*head)->next;	1349	head = &(*head)->next;
633	}	1350	}
634	}	1351	}
635		1352
636	static void	1353	inline void
637	ev_clear (W w)	1354	ev_clear_pending (EV_P_ W w)
638	{	1355	{
639	if (w->pending)	1356	if (w->pending)
640	{	1357	{
641	pendings [w->pending - 1].w = 0;	1358	pendings [ABSPRI (w)][w->pending - 1].w = 0;
642	w->pending = 0;	1359	w->pending = 0;
643	}	1360	}
644	}	1361	}
645		1362
646	static void	1363	inline void
647	ev_start (W w, int active)	1364	ev_start (EV_P_ W w, int active)
648	{	1365	{
		1366	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1367	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1368
649	w->active = active;	1369	w->active = active;
		1370	ev_ref (EV_A);
650	}	1371	}
651		1372
652	static void	1373	inline void
653	ev_stop (W w)	1374	ev_stop (EV_P_ W w)
654	{	1375	{
		1376	ev_unref (EV_A);
655	w->active = 0;	1377	w->active = 0;
656	}	1378	}
657		1379
658	/*****************************************************************************/	1380	/*****************************************************************************/
659		1381
660	void	1382	void
661	evio_start (struct ev_io *w)	1383	ev_io_start (EV_P_ struct ev_io *w)
662	{	1384	{
		1385	int fd = w->fd;
		1386
663	if (ev_is_active (w))	1387	if (expect_false (ev_is_active (w)))
664	return;	1388	return;
665		1389
666	int fd = w->fd;	1390	assert (("ev_io_start called with negative fd", fd >= 0));
667		1391
668	ev_start ((W)w, 1);	1392	ev_start (EV_A_ (W)w, 1);
669	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1393	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
670	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1394	wlist_add ((WL *)&anfds[fd].head, (WL)w);
671		1395
672	++fdchangecnt;	1396	fd_change (EV_A_ fd);
673	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
674	fdchanges [fdchangecnt - 1] = fd;
675	}	1397	}
676		1398
677	void	1399	void
678	evio_stop (struct ev_io *w)	1400	ev_io_stop (EV_P_ struct ev_io *w)
679	{	1401	{
680	ev_clear ((W)w);	1402	ev_clear_pending (EV_A_ (W)w);
681	if (!ev_is_active (w))	1403	if (expect_false (!ev_is_active (w)))
682	return;	1404	return;
683		1405
		1406	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1407
684	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1408	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
685	ev_stop ((W)w);	1409	ev_stop (EV_A_ (W)w);
686		1410
687	++fdchangecnt;	1411	fd_change (EV_A_ w->fd);
688	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
689	fdchanges [fdchangecnt - 1] = w->fd;
690	}	1412	}
691		1413
692	void	1414	void
693	evtimer_start (struct ev_timer *w)	1415	ev_timer_start (EV_P_ struct ev_timer *w)
694	{	1416	{
695	if (ev_is_active (w))	1417	if (expect_false (ev_is_active (w)))
696	return;	1418	return;
697		1419
698	w->at += now;	1420	((WT)w)->at += mn_now;
699		1421
700	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1422	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
701		1423
702	ev_start ((W)w, ++timercnt);	1424	ev_start (EV_A_ (W)w, ++timercnt);
703	array_needsize (timers, timermax, timercnt, );	1425	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
704	timers [timercnt - 1] = w;	1426	timers [timercnt - 1] = w;
705	upheap ((WT *)timers, timercnt - 1);	1427	upheap ((WT *)timers, timercnt - 1);
706	}
707		1428
		1429	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1430	}
		1431
708	void	1432	void
709	evtimer_stop (struct ev_timer *w)	1433	ev_timer_stop (EV_P_ struct ev_timer *w)
710	{	1434	{
711	ev_clear ((W)w);	1435	ev_clear_pending (EV_A_ (W)w);
712	if (!ev_is_active (w))	1436	if (expect_false (!ev_is_active (w)))
713	return;	1437	return;
714		1438
		1439	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1440
715	if (w->active < timercnt--)	1441	if (expect_true (((W)w)->active < timercnt--))
716	{	1442	{
717	timers [w->active - 1] = timers [timercnt];	1443	timers [((W)w)->active - 1] = timers [timercnt];
718	downheap ((WT *)timers, timercnt, w->active - 1);	1444	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
719	}	1445	}
720		1446
721	w->at = w->repeat;	1447	((WT)w)->at -= mn_now;
722		1448
723	ev_stop ((W)w);	1449	ev_stop (EV_A_ (W)w);
724	}	1450	}
725		1451
726	void	1452	void
727	evtimer_again (struct ev_timer *w)	1453	ev_timer_again (EV_P_ struct ev_timer *w)
728	{	1454	{
729	if (ev_is_active (w))	1455	if (ev_is_active (w))
730	{	1456	{
731	if (w->repeat)	1457	if (w->repeat)
732	{	1458	{
733	w->at = now + w->repeat;	1459	((WT)w)->at = mn_now + w->repeat;
734	downheap ((WT *)timers, timercnt, w->active - 1);	1460	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
735	}	1461	}
736	else	1462	else
737	evtimer_stop (w);	1463	ev_timer_stop (EV_A_ w);
738	}	1464	}
739	else if (w->repeat)	1465	else if (w->repeat)
		1466	{
		1467	w->at = w->repeat;
740	evtimer_start (w);	1468	ev_timer_start (EV_A_ w);
		1469	}
741	}	1470	}
742		1471
		1472	#if EV_PERIODICS
743	void	1473	void
744	evperiodic_start (struct ev_periodic *w)	1474	ev_periodic_start (EV_P_ struct ev_periodic *w)
745	{	1475	{
746	if (ev_is_active (w))	1476	if (expect_false (ev_is_active (w)))
747	return;	1477	return;
748		1478
749	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1479	if (w->reschedule_cb)
750		1480	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1481	else if (w->interval)
		1482	{
		1483	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
751	/* this formula differs from the one in periodic_reify because we do not always round up */	1484	/* this formula differs from the one in periodic_reify because we do not always round up */
752	if (w->interval)
753	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1485	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1486	}
754		1487
755	ev_start ((W)w, ++periodiccnt);	1488	ev_start (EV_A_ (W)w, ++periodiccnt);
756	array_needsize (periodics, periodicmax, periodiccnt, );	1489	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
757	periodics [periodiccnt - 1] = w;	1490	periodics [periodiccnt - 1] = w;
758	upheap ((WT *)periodics, periodiccnt - 1);	1491	upheap ((WT *)periodics, periodiccnt - 1);
759	}
760		1492
		1493	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1494	}
		1495
761	void	1496	void
762	evperiodic_stop (struct ev_periodic *w)	1497	ev_periodic_stop (EV_P_ struct ev_periodic *w)
763	{	1498	{
764	ev_clear ((W)w);	1499	ev_clear_pending (EV_A_ (W)w);
765	if (!ev_is_active (w))	1500	if (expect_false (!ev_is_active (w)))
766	return;	1501	return;
767		1502
		1503	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1504
768	if (w->active < periodiccnt--)	1505	if (expect_true (((W)w)->active < periodiccnt--))
769	{	1506	{
770	periodics [w->active - 1] = periodics [periodiccnt];	1507	periodics [((W)w)->active - 1] = periodics [periodiccnt];
771	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1508	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
772	}	1509	}
773		1510
774	ev_stop ((W)w);	1511	ev_stop (EV_A_ (W)w);
775	}	1512	}
776		1513
777	void	1514	void
778	evsignal_start (struct ev_signal *w)	1515	ev_periodic_again (EV_P_ struct ev_periodic *w)
779	{	1516	{
		1517	/* TODO: use adjustheap and recalculation */
		1518	ev_periodic_stop (EV_A_ w);
		1519	ev_periodic_start (EV_A_ w);
		1520	}
		1521	#endif
		1522
		1523	void
		1524	ev_idle_start (EV_P_ struct ev_idle *w)
		1525	{
780	if (ev_is_active (w))	1526	if (expect_false (ev_is_active (w)))
781	return;	1527	return;
782		1528
		1529	ev_start (EV_A_ (W)w, ++idlecnt);
		1530	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1531	idles [idlecnt - 1] = w;
		1532	}
		1533
		1534	void
		1535	ev_idle_stop (EV_P_ struct ev_idle *w)
		1536	{
		1537	ev_clear_pending (EV_A_ (W)w);
		1538	if (expect_false (!ev_is_active (w)))
		1539	return;
		1540
		1541	idles [((W)w)->active - 1] = idles [--idlecnt];
		1542	ev_stop (EV_A_ (W)w);
		1543	}
		1544
		1545	void
		1546	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1547	{
		1548	if (expect_false (ev_is_active (w)))
		1549	return;
		1550
		1551	ev_start (EV_A_ (W)w, ++preparecnt);
		1552	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1553	prepares [preparecnt - 1] = w;
		1554	}
		1555
		1556	void
		1557	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1558	{
		1559	ev_clear_pending (EV_A_ (W)w);
		1560	if (expect_false (!ev_is_active (w)))
		1561	return;
		1562
		1563	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1564	ev_stop (EV_A_ (W)w);
		1565	}
		1566
		1567	void
		1568	ev_check_start (EV_P_ struct ev_check *w)
		1569	{
		1570	if (expect_false (ev_is_active (w)))
		1571	return;
		1572
		1573	ev_start (EV_A_ (W)w, ++checkcnt);
		1574	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1575	checks [checkcnt - 1] = w;
		1576	}
		1577
		1578	void
		1579	ev_check_stop (EV_P_ struct ev_check *w)
		1580	{
		1581	ev_clear_pending (EV_A_ (W)w);
		1582	if (expect_false (!ev_is_active (w)))
		1583	return;
		1584
		1585	checks [((W)w)->active - 1] = checks [--checkcnt];
		1586	ev_stop (EV_A_ (W)w);
		1587	}
		1588
		1589	#ifndef SA_RESTART
		1590	# define SA_RESTART 0
		1591	#endif
		1592
		1593	void
		1594	ev_signal_start (EV_P_ struct ev_signal *w)
		1595	{
		1596	#if EV_MULTIPLICITY
		1597	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1598	#endif
		1599	if (expect_false (ev_is_active (w)))
		1600	return;
		1601
		1602	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1603
783	ev_start ((W)w, 1);	1604	ev_start (EV_A_ (W)w, 1);
784	array_needsize (signals, signalmax, w->signum, signals_init);	1605	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
785	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1606	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
786		1607
787	if (!w->next)	1608	if (!((WL)w)->next)
788	{	1609	{
		1610	#if _WIN32
		1611	signal (w->signum, sighandler);
		1612	#else
789	struct sigaction sa;	1613	struct sigaction sa;
790	sa.sa_handler = sighandler;	1614	sa.sa_handler = sighandler;
791	sigfillset (&sa.sa_mask);	1615	sigfillset (&sa.sa_mask);
792	sa.sa_flags = 0;	1616	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
793	sigaction (w->signum, &sa, 0);	1617	sigaction (w->signum, &sa, 0);
		1618	#endif
794	}	1619	}
795	}	1620	}
796		1621
797	void	1622	void
798	evsignal_stop (struct ev_signal *w)	1623	ev_signal_stop (EV_P_ struct ev_signal *w)
799	{	1624	{
800	ev_clear ((W)w);	1625	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1626	if (expect_false (!ev_is_active (w)))
802	return;	1627	return;
803		1628
804	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1629	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
805	ev_stop ((W)w);	1630	ev_stop (EV_A_ (W)w);
806		1631
807	if (!signals [w->signum - 1].head)	1632	if (!signals [w->signum - 1].head)
808	signal (w->signum, SIG_DFL);	1633	signal (w->signum, SIG_DFL);
809	}	1634	}
810		1635
811	void evidle_start (struct ev_idle *w)	1636	void
		1637	ev_child_start (EV_P_ struct ev_child *w)
812	{	1638	{
		1639	#if EV_MULTIPLICITY
		1640	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1641	#endif
813	if (ev_is_active (w))	1642	if (expect_false (ev_is_active (w)))
814	return;	1643	return;
815		1644
816	ev_start ((W)w, ++idlecnt);	1645	ev_start (EV_A_ (W)w, 1);
817	array_needsize (idles, idlemax, idlecnt, );	1646	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
818	idles [idlecnt - 1] = w;
819	}	1647	}
820		1648
821	void evidle_stop (struct ev_idle *w)	1649	void
		1650	ev_child_stop (EV_P_ struct ev_child *w)
822	{	1651	{
823	ev_clear ((W)w);	1652	ev_clear_pending (EV_A_ (W)w);
824	if (ev_is_active (w))	1653	if (expect_false (!ev_is_active (w)))
825	return;	1654	return;
826		1655
827	idles [w->active - 1] = idles [--idlecnt];	1656	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
828	ev_stop ((W)w);	1657	ev_stop (EV_A_ (W)w);
829	}
830
831	void evcheck_start (struct ev_check *w)
832	{
833	if (ev_is_active (w))
834	return;
835
836	ev_start ((W)w, ++checkcnt);
837	array_needsize (checks, checkmax, checkcnt, );
838	checks [checkcnt - 1] = w;
839	}
840
841	void evcheck_stop (struct ev_check *w)
842	{
843	ev_clear ((W)w);
844	if (ev_is_active (w))
845	return;
846
847	checks [w->active - 1] = checks [--checkcnt];
848	ev_stop ((W)w);
849	}	1658	}
850		1659
851	/*****************************************************************************/	1660	/*****************************************************************************/
852		1661
853	struct ev_once	1662	struct ev_once
…		…
857	void (*cb)(int revents, void *arg);	1666	void (*cb)(int revents, void *arg);
858	void *arg;	1667	void *arg;
859	};	1668	};
860		1669
861	static void	1670	static void
862	once_cb (struct ev_once *once, int revents)	1671	once_cb (EV_P_ struct ev_once *once, int revents)
863	{	1672	{
864	void (*cb)(int revents, void *arg) = once->cb;	1673	void (*cb)(int revents, void *arg) = once->cb;
865	void *arg = once->arg;	1674	void *arg = once->arg;
866		1675
867	evio_stop (&once->io);	1676	ev_io_stop (EV_A_ &once->io);
868	evtimer_stop (&once->to);	1677	ev_timer_stop (EV_A_ &once->to);
869	free (once);	1678	ev_free (once);
870		1679
871	cb (revents, arg);	1680	cb (revents, arg);
872	}	1681	}
873		1682
874	static void	1683	static void
875	once_cb_io (struct ev_io *w, int revents)	1684	once_cb_io (EV_P_ struct ev_io *w, int revents)
876	{	1685	{
877	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1686	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
878	}	1687	}
879		1688
880	static void	1689	static void
881	once_cb_to (struct ev_timer *w, int revents)	1690	once_cb_to (EV_P_ struct ev_timer *w, int revents)
882	{	1691	{
883	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1692	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
884	}	1693	}
885		1694
886	void	1695	void
887	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1696	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
888	{	1697	{
889	struct ev_once *once = malloc (sizeof (struct ev_once));	1698	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
890		1699
891	if (!once)	1700	if (expect_false (!once))
892	cb (EV_ERROR, arg);	1701	{
893	else	1702	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1703	return;
894	{	1704	}
		1705
895	once->cb = cb;	1706	once->cb = cb;
896	once->arg = arg;	1707	once->arg = arg;
897		1708
898	evw_init (&once->io, once_cb_io);	1709	ev_init (&once->io, once_cb_io);
899
900	if (fd >= 0)	1710	if (fd >= 0)
901	{	1711	{
902	evio_set (&once->io, fd, events);	1712	ev_io_set (&once->io, fd, events);
903	evio_start (&once->io);	1713	ev_io_start (EV_A_ &once->io);
904	}	1714	}
905		1715
906	evw_init (&once->to, once_cb_to);	1716	ev_init (&once->to, once_cb_to);
907
908	if (timeout >= 0.)	1717	if (timeout >= 0.)
909	{	1718	{
910	evtimer_set (&once->to, timeout, 0.);	1719	ev_timer_set (&once->to, timeout, 0.);
911	evtimer_start (&once->to);	1720	ev_timer_start (EV_A_ &once->to);
912	}
913	}
914	}
915
916	/*****************************************************************************/
917
918	#if 0
919
920	struct ev_io wio;
921
922	static void
923	sin_cb (struct ev_io *w, int revents)
924	{
925	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
926	}
927
928	static void
929	ocb (struct ev_timer *w, int revents)
930	{
931	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
932	evtimer_stop (w);
933	evtimer_start (w);
934	}
935
936	static void
937	scb (struct ev_signal *w, int revents)
938	{
939	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
940	evio_stop (&wio);
941	evio_start (&wio);
942	}
943
944	static void
945	gcb (struct ev_signal *w, int revents)
946	{
947	fprintf (stderr, "generic %x\n", revents);
948
949	}
950
951	int main (void)
952	{
953	ev_init (0);
954
955	evio_init (&wio, sin_cb, 0, EV_READ);
956	evio_start (&wio);
957
958	struct ev_timer t[10000];
959
960	#if 0
961	int i;
962	for (i = 0; i < 10000; ++i)
963	{	1721	}
964	struct ev_timer *w = t + i;
965	evw_init (w, ocb, i);
966	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
967	evtimer_start (w);
968	if (drand48 () < 0.5)
969	evtimer_stop (w);
970	}
971	#endif
972
973	struct ev_timer t1;
974	evtimer_init (&t1, ocb, 5, 10);
975	evtimer_start (&t1);
976
977	struct ev_signal sig;
978	evsignal_init (&sig, scb, SIGQUIT);
979	evsignal_start (&sig);
980
981	struct ev_check cw;
982	evcheck_init (&cw, gcb);
983	evcheck_start (&cw);
984
985	struct ev_idle iw;
986	evidle_init (&iw, gcb);
987	evidle_start (&iw);
988
989	ev_loop (0);
990
991	return 0;
992	}	1722	}
993		1723
		1724	#ifdef __cplusplus
		1725	}
994	#endif	1726	#endif
995		1727
996
997
998

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