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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 1.128 by root, Thu Nov 22 12:28:27 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	/* darwin simply cannot be helped */
		160	#ifdef __APPLE__
		161	# undef EV_USE_POLL
		162	# undef EV_USE_KQUEUE
		163	#endif
		164
		165	#ifndef CLOCK_MONOTONIC
		166	# undef EV_USE_MONOTONIC
		167	# define EV_USE_MONOTONIC 0
		168	#endif
		169
60	#ifndef HAVE_REALTIME	170	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	171	# undef EV_USE_REALTIME
		172	# define EV_USE_REALTIME 0
62	#endif	173	#endif
		174
		175	#if EV_SELECT_IS_WINSOCKET
		176	# include <winsock.h>
		177	#endif
		178
		179	/**/
63		180
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	181	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	182	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		183	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		184	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
66		185
		186	#ifdef EV_H
		187	# include EV_H
		188	#else
67	#include "ev.h"	189	# include "ev.h"
		190	#endif
		191
		192	#if __GNUC__ >= 3
		193	# define expect(expr,value) __builtin_expect ((expr),(value))
		194	# define inline static inline
		195	#else
		196	# define expect(expr,value) (expr)
		197	# define inline static
		198	#endif
		199
		200	#define expect_false(expr) expect ((expr) != 0, 0)
		201	#define expect_true(expr) expect ((expr) != 0, 1)
		202
		203	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		204	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		205
		206	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		207	#define EMPTY2(a,b) /* used to suppress some warnings */
68		208
69	typedef struct ev_watcher *W;	209	typedef struct ev_watcher *W;
70	typedef struct ev_watcher_list *WL;	210	typedef struct ev_watcher_list *WL;
71	typedef struct ev_watcher_time *WT;	211	typedef struct ev_watcher_time *WT;
72		212
73	static ev_tstamp now, diff; /* monotonic clock */	213	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		214
		215	#ifdef _WIN32
		216	# include "ev_win32.c"
		217	#endif
		218
		219	/*****************************************************************************/
		220
		221	static void (*syserr_cb)(const char *msg);
		222
		223	void ev_set_syserr_cb (void (*cb)(const char *msg))
		224	{
		225	syserr_cb = cb;
		226	}
		227
		228	static void
		229	syserr (const char *msg)
		230	{
		231	if (!msg)
		232	msg = "(libev) system error";
		233
		234	if (syserr_cb)
		235	syserr_cb (msg);
		236	else
		237	{
		238	perror (msg);
		239	abort ();
		240	}
		241	}
		242
		243	static void *(*alloc)(void *ptr, long size);
		244
		245	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		246	{
		247	alloc = cb;
		248	}
		249
		250	static void *
		251	ev_realloc (void *ptr, long size)
		252	{
		253	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		254
		255	if (!ptr && size)
		256	{
		257	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		258	abort ();
		259	}
		260
		261	return ptr;
		262	}
		263
		264	#define ev_malloc(size) ev_realloc (0, (size))
		265	#define ev_free(ptr) ev_realloc ((ptr), 0)
		266
		267	/*****************************************************************************/
		268
		269	typedef struct
		270	{
		271	WL head;
		272	unsigned char events;
		273	unsigned char reify;
		274	#if EV_SELECT_IS_WINSOCKET
		275	SOCKET handle;
		276	#endif
		277	} ANFD;
		278
		279	typedef struct
		280	{
		281	W w;
		282	int events;
		283	} ANPENDING;
		284
		285	#if EV_MULTIPLICITY
		286
		287	struct ev_loop
		288	{
		289	ev_tstamp ev_rt_now;
		290	#define ev_rt_now ((loop)->ev_rt_now)
		291	#define VAR(name,decl) decl;
		292	#include "ev_vars.h"
		293	#undef VAR
		294	};
		295	#include "ev_wrap.h"
		296
		297	static struct ev_loop default_loop_struct;
		298	struct ev_loop *ev_default_loop_ptr;
		299
		300	#else
		301
74	ev_tstamp ev_now;	302	ev_tstamp ev_rt_now;
75	int ev_method;	303	#define VAR(name,decl) static decl;
		304	#include "ev_vars.h"
		305	#undef VAR
76		306
77	static int have_monotonic; /* runtime */	307	static int ev_default_loop_ptr;
78		308
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	309	#endif
80	static void (*method_modify)(int fd, int oev, int nev);
81	static void (*method_poll)(ev_tstamp timeout);
82		310
83	/*****************************************************************************/	311	/*****************************************************************************/
84		312
85	ev_tstamp	313	ev_tstamp
86	ev_time (void)	314	ev_time (void)
87	{	315	{
88	#if HAVE_REALTIME	316	#if EV_USE_REALTIME
89	struct timespec ts;	317	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	318	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	319	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	320	#else
93	struct timeval tv;	321	struct timeval tv;
94	gettimeofday (&tv, 0);	322	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	323	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	324	#endif
97	}	325	}
98		326
99	static ev_tstamp	327	inline ev_tstamp
100	get_clock (void)	328	get_clock (void)
101	{	329	{
102	#if HAVE_MONOTONIC	330	#if EV_USE_MONOTONIC
103	if (have_monotonic)	331	if (expect_true (have_monotonic))
104	{	332	{
105	struct timespec ts;	333	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	334	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	335	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	336	}
109	#endif	337	#endif
110		338
111	return ev_time ();	339	return ev_time ();
112	}	340	}
113		341
		342	#if EV_MULTIPLICITY
		343	ev_tstamp
		344	ev_now (EV_P)
		345	{
		346	return ev_rt_now;
		347	}
		348	#endif
		349
		350	#define array_roundsize(type,n) (((n) | 4) & ~3)
		351
114	#define array_needsize(base,cur,cnt,init) \	352	#define array_needsize(type,base,cur,cnt,init) \
115	if ((cnt) > cur) \	353	if (expect_false ((cnt) > cur)) \
116	{ \	354	{ \
117	int newcnt = cur ? cur << 1 : 16; \	355	int newcnt = cur; \
		356	do \
		357	{ \
		358	newcnt = array_roundsize (type, newcnt << 1); \
		359	} \
		360	while ((cnt) > newcnt); \
		361	\
118	base = realloc (base, sizeof (*base) * (newcnt)); \	362	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
119	init (base + cur, newcnt - cur); \	363	init (base + cur, newcnt - cur); \
120	cur = newcnt; \	364	cur = newcnt; \
121	}	365	}
		366
		367	#define array_slim(type,stem) \
		368	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		369	{ \
		370	stem ## max = array_roundsize (stem ## cnt >> 1); \
		371	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		372	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		373	}
		374
		375	#define array_free(stem, idx) \
		376	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
122		377
123	/*****************************************************************************/	378	/*****************************************************************************/
124		379
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	380	static void
138	anfds_init (ANFD *base, int count)	381	anfds_init (ANFD *base, int count)
139	{	382	{
140	while (count--)	383	while (count--)
141	{	384	{
142	base->head = 0;	385	base->head = 0;
143	base->wev = base->rev = EV_NONE;	386	base->events = EV_NONE;
		387	base->reify = 0;
		388
144	++base;	389	++base;
145	}	390	}
146	}	391	}
147		392
148	typedef struct	393	void
		394	ev_feed_event (EV_P_ void *w, int revents)
149	{	395	{
150	W w;	396	W w_ = (W)w;
151	int events;
152	} ANPENDING;
153		397
154	static ANPENDING *pendings;	398	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	{	399	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	400	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		401	return;
166	}	402	}
167	}
168		403
		404	w_->pending = ++pendingcnt [ABSPRI (w_)];
		405	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		406	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		407	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		408	}
		409
169	static void	410	static void
		411	queue_events (EV_P_ W *events, int eventcnt, int type)
		412	{
		413	int i;
		414
		415	for (i = 0; i < eventcnt; ++i)
		416	ev_feed_event (EV_A_ events [i], type);
		417	}
		418
		419	inline void
170	fd_event (int fd, int events)	420	fd_event (EV_P_ int fd, int revents)
171	{	421	{
172	ANFD *anfd = anfds + fd;	422	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	423	struct ev_io *w;
174		424
175	for (w = anfd->head; w; w = w->next)	425	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
176	{	426	{
177	int ev = w->events & events;	427	int ev = w->events & revents;
178		428
179	if (ev)	429	if (ev)
180	event ((W)w, ev);	430	ev_feed_event (EV_A_ (W)w, ev);
181	}	431	}
182	}	432	}
183		433
184	static void	434	void
185	queue_events (W *events, int eventcnt, int type)	435	ev_feed_fd_event (EV_P_ int fd, int revents)
186	{	436	{
187	int i;	437	fd_event (EV_A_ fd, revents);
188
189	for (i = 0; i < eventcnt; ++i)
190	event (events [i], type);
191	}	438	}
192		439
193	/*****************************************************************************/	440	/*****************************************************************************/
194		441
195	static struct ev_timer **timers;	442	inline void
196	static int timermax, timercnt;	443	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	{	444	{
395	int i;	445	int i;
396		446
397	for (i = 0; i < fdchangecnt; ++i)	447	for (i = 0; i < fdchangecnt; ++i)
398	{	448	{
399	int fd = fdchanges [i];	449	int fd = fdchanges [i];
400	ANFD *anfd = anfds + fd;	450	ANFD *anfd = anfds + fd;
401	struct ev_io *w;	451	struct ev_io *w;
402		452
403	int wev = 0;	453	int events = 0;
404		454
405	for (w = anfd->head; w; w = w->next)	455	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
406	wev |= w->events;	456	events |= w->events;
407		457
408	if (anfd->wev != wev)	458	#if EV_SELECT_IS_WINSOCKET
		459	if (events)
409	{	460	{
410	method_modify (fd, anfd->wev, wev);	461	unsigned long argp;
411	anfd->wev = wev;	462	anfd->handle = _get_osfhandle (fd);
		463	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
412	}	464	}
		465	#endif
		466
		467	anfd->reify = 0;
		468
		469	method_modify (EV_A_ fd, anfd->events, events);
		470	anfd->events = events;
413	}	471	}
414		472
415	fdchangecnt = 0;	473	fdchangecnt = 0;
416	}	474	}
417		475
418	static void	476	static void
419	call_pending ()	477	fd_change (EV_P_ int fd)
		478	{
		479	if (expect_false (anfds [fd].reify))
		480	return;
		481
		482	anfds [fd].reify = 1;
		483
		484	++fdchangecnt;
		485	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		486	fdchanges [fdchangecnt - 1] = fd;
		487	}
		488
		489	static void
		490	fd_kill (EV_P_ int fd)
		491	{
		492	struct ev_io *w;
		493
		494	while ((w = (struct ev_io *)anfds [fd].head))
		495	{
		496	ev_io_stop (EV_A_ w);
		497	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		498	}
		499	}
		500
		501	inline int
		502	fd_valid (int fd)
		503	{
		504	#ifdef _WIN32
		505	return _get_osfhandle (fd) != -1;
		506	#else
		507	return fcntl (fd, F_GETFD) != -1;
		508	#endif
		509	}
		510
		511	/* called on EBADF to verify fds */
		512	static void
		513	fd_ebadf (EV_P)
		514	{
		515	int fd;
		516
		517	for (fd = 0; fd < anfdmax; ++fd)
		518	if (anfds [fd].events)
		519	if (!fd_valid (fd) == -1 && errno == EBADF)
		520	fd_kill (EV_A_ fd);
		521	}
		522
		523	/* called on ENOMEM in select/poll to kill some fds and retry */
		524	static void
		525	fd_enomem (EV_P)
		526	{
		527	int fd;
		528
		529	for (fd = anfdmax; fd--; )
		530	if (anfds [fd].events)
		531	{
		532	fd_kill (EV_A_ fd);
		533	return;
		534	}
		535	}
		536
		537	/* usually called after fork if method needs to re-arm all fds from scratch */
		538	static void
		539	fd_rearm_all (EV_P)
		540	{
		541	int fd;
		542
		543	/* this should be highly optimised to not do anything but set a flag */
		544	for (fd = 0; fd < anfdmax; ++fd)
		545	if (anfds [fd].events)
		546	{
		547	anfds [fd].events = 0;
		548	fd_change (EV_A_ fd);
		549	}
		550	}
		551
		552	/*****************************************************************************/
		553
		554	static void
		555	upheap (WT *heap, int k)
		556	{
		557	WT w = heap [k];
		558
		559	while (k && heap [k >> 1]->at > w->at)
		560	{
		561	heap [k] = heap [k >> 1];
		562	((W)heap [k])->active = k + 1;
		563	k >>= 1;
		564	}
		565
		566	heap [k] = w;
		567	((W)heap [k])->active = k + 1;
		568
		569	}
		570
		571	static void
		572	downheap (WT *heap, int N, int k)
		573	{
		574	WT w = heap [k];
		575
		576	while (k < (N >> 1))
		577	{
		578	int j = k << 1;
		579
		580	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		581	++j;
		582
		583	if (w->at <= heap [j]->at)
		584	break;
		585
		586	heap [k] = heap [j];
		587	((W)heap [k])->active = k + 1;
		588	k = j;
		589	}
		590
		591	heap [k] = w;
		592	((W)heap [k])->active = k + 1;
		593	}
		594
		595	inline void
		596	adjustheap (WT *heap, int N, int k)
		597	{
		598	upheap (heap, k);
		599	downheap (heap, N, k);
		600	}
		601
		602	/*****************************************************************************/
		603
		604	typedef struct
		605	{
		606	WL head;
		607	sig_atomic_t volatile gotsig;
		608	} ANSIG;
		609
		610	static ANSIG *signals;
		611	static int signalmax;
		612
		613	static int sigpipe [2];
		614	static sig_atomic_t volatile gotsig;
		615	static struct ev_io sigev;
		616
		617	static void
		618	signals_init (ANSIG *base, int count)
		619	{
		620	while (count--)
		621	{
		622	base->head = 0;
		623	base->gotsig = 0;
		624
		625	++base;
		626	}
		627	}
		628
		629	static void
		630	sighandler (int signum)
		631	{
		632	#if _WIN32
		633	signal (signum, sighandler);
		634	#endif
		635
		636	signals [signum - 1].gotsig = 1;
		637
		638	if (!gotsig)
		639	{
		640	int old_errno = errno;
		641	gotsig = 1;
		642	write (sigpipe [1], &signum, 1);
		643	errno = old_errno;
		644	}
		645	}
		646
		647	void
		648	ev_feed_signal_event (EV_P_ int signum)
		649	{
		650	WL w;
		651
		652	#if EV_MULTIPLICITY
		653	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		654	#endif
		655
		656	--signum;
		657
		658	if (signum < 0 || signum >= signalmax)
		659	return;
		660
		661	signals [signum].gotsig = 0;
		662
		663	for (w = signals [signum].head; w; w = w->next)
		664	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		665	}
		666
		667	static void
		668	sigcb (EV_P_ struct ev_io *iow, int revents)
		669	{
		670	int signum;
		671
		672	read (sigpipe [0], &revents, 1);
		673	gotsig = 0;
		674
		675	for (signum = signalmax; signum--; )
		676	if (signals [signum].gotsig)
		677	ev_feed_signal_event (EV_A_ signum + 1);
		678	}
		679
		680	static void
		681	fd_intern (int fd)
		682	{
		683	#ifdef _WIN32
		684	int arg = 1;
		685	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		686	#else
		687	fcntl (fd, F_SETFD, FD_CLOEXEC);
		688	fcntl (fd, F_SETFL, O_NONBLOCK);
		689	#endif
		690	}
		691
		692	static void
		693	siginit (EV_P)
		694	{
		695	fd_intern (sigpipe [0]);
		696	fd_intern (sigpipe [1]);
		697
		698	ev_io_set (&sigev, sigpipe [0], EV_READ);
		699	ev_io_start (EV_A_ &sigev);
		700	ev_unref (EV_A); /* child watcher should not keep loop alive */
		701	}
		702
		703	/*****************************************************************************/
		704
		705	static struct ev_child *childs [PID_HASHSIZE];
		706
		707	#ifndef _WIN32
		708
		709	static struct ev_signal childev;
		710
		711	#ifndef WCONTINUED
		712	# define WCONTINUED 0
		713	#endif
		714
		715	static void
		716	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		717	{
		718	struct ev_child *w;
		719
		720	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		721	if (w->pid == pid || !w->pid)
		722	{
		723	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		724	w->rpid = pid;
		725	w->rstatus = status;
		726	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		727	}
		728	}
		729
		730	static void
		731	childcb (EV_P_ struct ev_signal *sw, int revents)
		732	{
		733	int pid, status;
		734
		735	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		736	{
		737	/* make sure we are called again until all childs have been reaped */
		738	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		739
		740	child_reap (EV_A_ sw, pid, pid, status);
		741	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		742	}
		743	}
		744
		745	#endif
		746
		747	/*****************************************************************************/
		748
		749	#if EV_USE_PORT
		750	# include "ev_port.c"
		751	#endif
		752	#if EV_USE_KQUEUE
		753	# include "ev_kqueue.c"
		754	#endif
		755	#if EV_USE_EPOLL
		756	# include "ev_epoll.c"
		757	#endif
		758	#if EV_USE_POLL
		759	# include "ev_poll.c"
		760	#endif
		761	#if EV_USE_SELECT
		762	# include "ev_select.c"
		763	#endif
		764
		765	int
		766	ev_version_major (void)
		767	{
		768	return EV_VERSION_MAJOR;
		769	}
		770
		771	int
		772	ev_version_minor (void)
		773	{
		774	return EV_VERSION_MINOR;
		775	}
		776
		777	/* return true if we are running with elevated privileges and should ignore env variables */
		778	static int
		779	enable_secure (void)
		780	{
		781	#ifdef _WIN32
		782	return 0;
		783	#else
		784	return getuid () != geteuid ()
		785	|| getgid () != getegid ();
		786	#endif
		787	}
		788
		789	unsigned int
		790	ev_method (EV_P)
		791	{
		792	return method;
		793	}
		794
		795	static void
		796	loop_init (EV_P_ unsigned int flags)
		797	{
		798	if (!method)
		799	{
		800	#if EV_USE_MONOTONIC
		801	{
		802	struct timespec ts;
		803	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		804	have_monotonic = 1;
		805	}
		806	#endif
		807
		808	ev_rt_now = ev_time ();
		809	mn_now = get_clock ();
		810	now_floor = mn_now;
		811	rtmn_diff = ev_rt_now - mn_now;
		812
		813	if (!(flags & EVFLAG_NOENV)
		814	&& !enable_secure ()
		815	&& getenv ("LIBEV_FLAGS"))
		816	flags = atoi (getenv ("LIBEV_FLAGS"));
		817
		818	if (!(flags & EVMETHOD_ALL))
		819	{
		820	flags |= EVMETHOD_ALL;
		821	#if EV_USE_KQUEUE && !defined (__NetBSD__)
		822	/* kqueue is borked on everything but netbsd apparently */
		823	/* it usually doesn't work correctly on anything but sockets and pipes */
		824	flags &= ~EVMETHOD_KQUEUE;
		825	#endif
		826	}
		827
		828	method = 0;
		829	#if EV_USE_PORT
		830	if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);
		831	#endif
		832	#if EV_USE_KQUEUE
		833	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		834	#endif
		835	#if EV_USE_EPOLL
		836	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
		837	#endif
		838	#if EV_USE_POLL
		839	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
		840	#endif
		841	#if EV_USE_SELECT
		842	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
		843	#endif
		844
		845	ev_init (&sigev, sigcb);
		846	ev_set_priority (&sigev, EV_MAXPRI);
		847	}
		848	}
		849
		850	static void
		851	loop_destroy (EV_P)
420	{	852	{
421	int i;	853	int i;
422		854
423	for (i = 0; i < pendingcnt; ++i)	855	#if EV_USE_PORT
		856	if (method == EVMETHOD_PORT ) port_destroy (EV_A);
		857	#endif
		858	#if EV_USE_KQUEUE
		859	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		860	#endif
		861	#if EV_USE_EPOLL
		862	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		863	#endif
		864	#if EV_USE_POLL
		865	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		866	#endif
		867	#if EV_USE_SELECT
		868	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		869	#endif
		870
		871	for (i = NUMPRI; i--; )
		872	array_free (pending, [i]);
		873
		874	/* have to use the microsoft-never-gets-it-right macro */
		875	array_free (fdchange, EMPTY0);
		876	array_free (timer, EMPTY0);
		877	#if EV_PERIODICS
		878	array_free (periodic, EMPTY0);
		879	#endif
		880	array_free (idle, EMPTY0);
		881	array_free (prepare, EMPTY0);
		882	array_free (check, EMPTY0);
		883
		884	method = 0;
		885	}
		886
		887	static void
		888	loop_fork (EV_P)
		889	{
		890	#if EV_USE_PORT
		891	if (method == EVMETHOD_PORT ) port_fork (EV_A);
		892	#endif
		893	#if EV_USE_KQUEUE
		894	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		895	#endif
		896	#if EV_USE_EPOLL
		897	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		898	#endif
		899
		900	if (ev_is_active (&sigev))
		901	{
		902	/* default loop */
		903
		904	ev_ref (EV_A);
		905	ev_io_stop (EV_A_ &sigev);
		906	close (sigpipe [0]);
		907	close (sigpipe [1]);
		908
		909	while (pipe (sigpipe))
		910	syserr ("(libev) error creating pipe");
		911
		912	siginit (EV_A);
424	{	913	}
425	ANPENDING *p = pendings + i;
426		914
427	if (p->w)	915	postfork = 0;
		916	}
		917
		918	#if EV_MULTIPLICITY
		919	struct ev_loop *
		920	ev_loop_new (unsigned int flags)
		921	{
		922	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		923
		924	memset (loop, 0, sizeof (struct ev_loop));
		925
		926	loop_init (EV_A_ flags);
		927
		928	if (ev_method (EV_A))
		929	return loop;
		930
		931	return 0;
		932	}
		933
		934	void
		935	ev_loop_destroy (EV_P)
		936	{
		937	loop_destroy (EV_A);
		938	ev_free (loop);
		939	}
		940
		941	void
		942	ev_loop_fork (EV_P)
		943	{
		944	postfork = 1;
		945	}
		946
		947	#endif
		948
		949	#if EV_MULTIPLICITY
		950	struct ev_loop *
		951	ev_default_loop_init (unsigned int flags)
		952	#else
		953	int
		954	ev_default_loop (unsigned int flags)
		955	#endif
		956	{
		957	if (sigpipe [0] == sigpipe [1])
		958	if (pipe (sigpipe))
		959	return 0;
		960
		961	if (!ev_default_loop_ptr)
		962	{
		963	#if EV_MULTIPLICITY
		964	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		965	#else
		966	ev_default_loop_ptr = 1;
		967	#endif
		968
		969	loop_init (EV_A_ flags);
		970
		971	if (ev_method (EV_A))
428	{	972	{
429	p->w->pending = 0;	973	siginit (EV_A);
430	p->w->cb (p->w, p->events);	974
		975	#ifndef _WIN32
		976	ev_signal_init (&childev, childcb, SIGCHLD);
		977	ev_set_priority (&childev, EV_MAXPRI);
		978	ev_signal_start (EV_A_ &childev);
		979	ev_unref (EV_A); /* child watcher should not keep loop alive */
		980	#endif
431	}	981	}
		982	else
		983	ev_default_loop_ptr = 0;
		984	}
		985
		986	return ev_default_loop_ptr;
		987	}
		988
		989	void
		990	ev_default_destroy (void)
		991	{
		992	#if EV_MULTIPLICITY
		993	struct ev_loop *loop = ev_default_loop_ptr;
		994	#endif
		995
		996	#ifndef _WIN32
		997	ev_ref (EV_A); /* child watcher */
		998	ev_signal_stop (EV_A_ &childev);
		999	#endif
		1000
		1001	ev_ref (EV_A); /* signal watcher */
		1002	ev_io_stop (EV_A_ &sigev);
		1003
		1004	close (sigpipe [0]); sigpipe [0] = 0;
		1005	close (sigpipe [1]); sigpipe [1] = 0;
		1006
		1007	loop_destroy (EV_A);
		1008	}
		1009
		1010	void
		1011	ev_default_fork (void)
		1012	{
		1013	#if EV_MULTIPLICITY
		1014	struct ev_loop *loop = ev_default_loop_ptr;
		1015	#endif
		1016
		1017	if (method)
		1018	postfork = 1;
		1019	}
		1020
		1021	/*****************************************************************************/
		1022
		1023	static int
		1024	any_pending (EV_P)
		1025	{
		1026	int pri;
		1027
		1028	for (pri = NUMPRI; pri--; )
		1029	if (pendingcnt [pri])
		1030	return 1;
		1031
		1032	return 0;
		1033	}
		1034
		1035	inline void
		1036	call_pending (EV_P)
		1037	{
		1038	int pri;
		1039
		1040	for (pri = NUMPRI; pri--; )
		1041	while (pendingcnt [pri])
		1042	{
		1043	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1044
		1045	if (expect_true (p->w))
		1046	{
		1047	p->w->pending = 0;
		1048	EV_CB_INVOKE (p->w, p->events);
		1049	}
432	}	1050	}
433
434	pendingcnt = 0;
435	}	1051	}
436		1052
437	static void	1053	inline void
438	timers_reify ()	1054	timers_reify (EV_P)
439	{	1055	{
440	while (timercnt && timers [0]->at <= now)	1056	while (timercnt && ((WT)timers [0])->at <= mn_now)
441	{	1057	{
442	struct ev_timer *w = timers [0];	1058	struct ev_timer *w = timers [0];
443		1059
444	event ((W)w, EV_TIMEOUT);	1060	assert (("inactive timer on timer heap detected", ev_is_active (w)));
445		1061
446	/* first reschedule or stop timer */	1062	/* first reschedule or stop timer */
447	if (w->repeat)	1063	if (w->repeat)
448	{	1064	{
		1065	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1066
449	w->at = now + w->repeat;	1067	((WT)w)->at += w->repeat;
450	assert (("timer timeout in the past, negative repeat?", w->at > now));	1068	if (((WT)w)->at < mn_now)
		1069	((WT)w)->at = mn_now;
		1070
451	downheap ((WT *)timers, timercnt, 0);	1071	downheap ((WT *)timers, timercnt, 0);
452	}	1072	}
453	else	1073	else
454	evtimer_stop (w); /* nonrepeating: stop timer */	1074	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
455	}
456	}
457		1075
458	static void	1076	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1077	}
		1078	}
		1079
		1080	#if EV_PERIODICS
		1081	inline void
459	periodics_reify ()	1082	periodics_reify (EV_P)
460	{	1083	{
461	while (periodiccnt && periodics [0]->at <= ev_now)	1084	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
462	{	1085	{
463	struct ev_periodic *w = periodics [0];	1086	struct ev_periodic *w = periodics [0];
464		1087
		1088	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1089
465	/* first reschedule or stop timer */	1090	/* first reschedule or stop timer */
466	if (w->interval)	1091	if (w->reschedule_cb)
467	{	1092	{
		1093	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1094	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1095	downheap ((WT *)periodics, periodiccnt, 0);
		1096	}
		1097	else if (w->interval)
		1098	{
468	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1099	((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));	1100	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);	1101	downheap ((WT *)periodics, periodiccnt, 0);
471	}	1102	}
472	else	1103	else
473	evperiodic_stop (w); /* nonrepeating: stop timer */	1104	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
474		1105
475	event ((W)w, EV_TIMEOUT);	1106	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
476	}	1107	}
477	}	1108	}
478		1109
479	static void	1110	static void
480	periodics_reschedule (ev_tstamp diff)	1111	periodics_reschedule (EV_P)
481	{	1112	{
482	int i;	1113	int i;
483		1114
484	/* adjust periodics after time jump */	1115	/* adjust periodics after time jump */
485	for (i = 0; i < periodiccnt; ++i)	1116	for (i = 0; i < periodiccnt; ++i)
486	{	1117	{
487	struct ev_periodic *w = periodics [i];	1118	struct ev_periodic *w = periodics [i];
488		1119
		1120	if (w->reschedule_cb)
		1121	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
489	if (w->interval)	1122	else if (w->interval)
		1123	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1124	}
		1125
		1126	/* now rebuild the heap */
		1127	for (i = periodiccnt >> 1; i--; )
		1128	downheap ((WT *)periodics, periodiccnt, i);
		1129	}
		1130	#endif
		1131
		1132	inline int
		1133	time_update_monotonic (EV_P)
		1134	{
		1135	mn_now = get_clock ();
		1136
		1137	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1138	{
		1139	ev_rt_now = rtmn_diff + mn_now;
		1140	return 0;
		1141	}
		1142	else
		1143	{
		1144	now_floor = mn_now;
		1145	ev_rt_now = ev_time ();
		1146	return 1;
		1147	}
		1148	}
		1149
		1150	inline void
		1151	time_update (EV_P)
		1152	{
		1153	int i;
		1154
		1155	#if EV_USE_MONOTONIC
		1156	if (expect_true (have_monotonic))
		1157	{
		1158	if (time_update_monotonic (EV_A))
490	{	1159	{
491	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1160	ev_tstamp odiff = rtmn_diff;
492		1161
493	if (fabs (diff) >= 1e-4)	1162	for (i = 4; --i; ) /* loop a few times, before making important decisions */
494	{	1163	{
495	evperiodic_stop (w);	1164	rtmn_diff = ev_rt_now - mn_now;
496	evperiodic_start (w);
497		1165
498	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1166	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1167	return; /* all is well */
		1168
		1169	ev_rt_now = ev_time ();
		1170	mn_now = get_clock ();
		1171	now_floor = mn_now;
499	}	1172	}
		1173
		1174	# if EV_PERIODICS
		1175	periodics_reschedule (EV_A);
		1176	# endif
		1177	/* no timer adjustment, as the monotonic clock doesn't jump */
		1178	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
500	}	1179	}
501	}	1180	}
502	}	1181	else
503		1182	#endif
504	static void	1183	{
505	time_update ()
506	{
507	int i;
508
509	ev_now = ev_time ();	1184	ev_rt_now = ev_time ();
510		1185
511	if (have_monotonic)	1186	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	{	1187	{
517	now = get_clock ();	1188	#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);	1189	periodics_reschedule (EV_A);
		1190	#endif
534		1191
535	/* adjust timers. this is easy, as the offset is the same for all */	1192	/* adjust timers. this is easy, as the offset is the same for all */
536	for (i = 0; i < timercnt; ++i)	1193	for (i = 0; i < timercnt; ++i)
537	timers [i]->at += diff;	1194	((WT)timers [i])->at += ev_rt_now - mn_now;
538	}	1195	}
539		1196
540	now = ev_now;	1197	mn_now = ev_rt_now;
541	}	1198	}
542	}	1199	}
543		1200
544	int ev_loop_done;	1201	void
		1202	ev_ref (EV_P)
		1203	{
		1204	++activecnt;
		1205	}
545		1206
		1207	void
		1208	ev_unref (EV_P)
		1209	{
		1210	--activecnt;
		1211	}
		1212
		1213	static int loop_done;
		1214
		1215	void
546	void ev_loop (int flags)	1216	ev_loop (EV_P_ int flags)
547	{	1217	{
548	double block;	1218	double block;
549	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1219	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
550		1220
551	if (checkcnt)	1221	while (activecnt)
552	{	1222	{
553	queue_events ((W *)checks, checkcnt, EV_CHECK);	1223	/* queue check watchers (and execute them) */
		1224	if (expect_false (preparecnt))
		1225	{
		1226	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
554	call_pending ();	1227	call_pending (EV_A);
555	}	1228	}
556		1229
557	do	1230	/* we might have forked, so reify kernel state if necessary */
558	{	1231	if (expect_false (postfork))
		1232	loop_fork (EV_A);
		1233
559	/* update fd-related kernel structures */	1234	/* update fd-related kernel structures */
560	fd_reify ();	1235	fd_reify (EV_A);
561		1236
562	/* calculate blocking time */	1237	/* calculate blocking time */
563		1238
564	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1239	/* we only need this for !monotonic clock or timers, but as we basically
		1240	always have timers, we just calculate it always */
		1241	#if EV_USE_MONOTONIC
		1242	if (expect_true (have_monotonic))
		1243	time_update_monotonic (EV_A);
		1244	else
		1245	#endif
		1246	{
565	ev_now = ev_time ();	1247	ev_rt_now = ev_time ();
		1248	mn_now = ev_rt_now;
		1249	}
566		1250
567	if (flags & EVLOOP_NONBLOCK || idlecnt)	1251	if (flags & EVLOOP_NONBLOCK || idlecnt)
568	block = 0.;	1252	block = 0.;
569	else	1253	else
570	{	1254	{
571	block = MAX_BLOCKTIME;	1255	block = MAX_BLOCKTIME;
572		1256
573	if (timercnt)	1257	if (timercnt)
574	{	1258	{
575	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1259	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
576	if (block > to) block = to;	1260	if (block > to) block = to;
577	}	1261	}
578		1262
		1263	#if EV_PERIODICS
579	if (periodiccnt)	1264	if (periodiccnt)
580	{	1265	{
581	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1266	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
582	if (block > to) block = to;	1267	if (block > to) block = to;
583	}	1268	}
		1269	#endif
584		1270
585	if (block < 0.) block = 0.;	1271	if (expect_false (block < 0.)) block = 0.;
586	}	1272	}
587		1273
588	method_poll (block);	1274	method_poll (EV_A_ block);
589		1275
590	/* update ev_now, do magic */	1276	/* update ev_rt_now, do magic */
591	time_update ();	1277	time_update (EV_A);
592		1278
593	/* queue pending timers and reschedule them */	1279	/* queue pending timers and reschedule them */
		1280	timers_reify (EV_A); /* relative timers called last */
		1281	#if EV_PERIODICS
594	periodics_reify (); /* absolute timers first */	1282	periodics_reify (EV_A); /* absolute timers called first */
595	timers_reify (); /* relative timers second */	1283	#endif
596		1284
597	/* queue idle watchers unless io or timers are pending */	1285	/* queue idle watchers unless io or timers are pending */
598	if (!pendingcnt)	1286	if (idlecnt && !any_pending (EV_A))
599	queue_events ((W *)idles, idlecnt, EV_IDLE);	1287	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
600		1288
601	/* queue check and possibly idle watchers */	1289	/* queue check watchers, to be executed first */
		1290	if (expect_false (checkcnt))
602	queue_events ((W *)checks, checkcnt, EV_CHECK);	1291	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
603		1292
604	call_pending ();	1293	call_pending (EV_A);
605	}
606	while (!ev_loop_done);
607		1294
		1295	if (expect_false (loop_done))
		1296	break;
		1297	}
		1298
608	if (ev_loop_done != 2)	1299	if (loop_done != 2)
609	ev_loop_done = 0;	1300	loop_done = 0;
		1301	}
		1302
		1303	void
		1304	ev_unloop (EV_P_ int how)
		1305	{
		1306	loop_done = how;
610	}	1307	}
611		1308
612	/*****************************************************************************/	1309	/*****************************************************************************/
613		1310
614	static void	1311	inline void
615	wlist_add (WL *head, WL elem)	1312	wlist_add (WL *head, WL elem)
616	{	1313	{
617	elem->next = *head;	1314	elem->next = *head;
618	*head = elem;	1315	*head = elem;
619	}	1316	}
620		1317
621	static void	1318	inline void
622	wlist_del (WL *head, WL elem)	1319	wlist_del (WL *head, WL elem)
623	{	1320	{
624	while (*head)	1321	while (*head)
625	{	1322	{
626	if (*head == elem)	1323	if (*head == elem)
…		…
631		1328
632	head = &(*head)->next;	1329	head = &(*head)->next;
633	}	1330	}
634	}	1331	}
635		1332
636	static void	1333	inline void
637	ev_clear (W w)	1334	ev_clear_pending (EV_P_ W w)
638	{	1335	{
639	if (w->pending)	1336	if (w->pending)
640	{	1337	{
641	pendings [w->pending - 1].w = 0;	1338	pendings [ABSPRI (w)][w->pending - 1].w = 0;
642	w->pending = 0;	1339	w->pending = 0;
643	}	1340	}
644	}	1341	}
645		1342
646	static void	1343	inline void
647	ev_start (W w, int active)	1344	ev_start (EV_P_ W w, int active)
648	{	1345	{
		1346	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1347	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1348
649	w->active = active;	1349	w->active = active;
		1350	ev_ref (EV_A);
650	}	1351	}
651		1352
652	static void	1353	inline void
653	ev_stop (W w)	1354	ev_stop (EV_P_ W w)
654	{	1355	{
		1356	ev_unref (EV_A);
655	w->active = 0;	1357	w->active = 0;
656	}	1358	}
657		1359
658	/*****************************************************************************/	1360	/*****************************************************************************/
659		1361
660	void	1362	void
661	evio_start (struct ev_io *w)	1363	ev_io_start (EV_P_ struct ev_io *w)
662	{	1364	{
		1365	int fd = w->fd;
		1366
663	if (ev_is_active (w))	1367	if (expect_false (ev_is_active (w)))
664	return;	1368	return;
665		1369
666	int fd = w->fd;	1370	assert (("ev_io_start called with negative fd", fd >= 0));
667		1371
668	ev_start ((W)w, 1);	1372	ev_start (EV_A_ (W)w, 1);
669	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1373	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
670	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1374	wlist_add ((WL *)&anfds[fd].head, (WL)w);
671		1375
672	++fdchangecnt;	1376	fd_change (EV_A_ fd);
673	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
674	fdchanges [fdchangecnt - 1] = fd;
675	}	1377	}
676		1378
677	void	1379	void
678	evio_stop (struct ev_io *w)	1380	ev_io_stop (EV_P_ struct ev_io *w)
679	{	1381	{
680	ev_clear ((W)w);	1382	ev_clear_pending (EV_A_ (W)w);
681	if (!ev_is_active (w))	1383	if (expect_false (!ev_is_active (w)))
682	return;	1384	return;
683		1385
		1386	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1387
684	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1388	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
685	ev_stop ((W)w);	1389	ev_stop (EV_A_ (W)w);
686		1390
687	++fdchangecnt;	1391	fd_change (EV_A_ w->fd);
688	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
689	fdchanges [fdchangecnt - 1] = w->fd;
690	}	1392	}
691		1393
692	void	1394	void
693	evtimer_start (struct ev_timer *w)	1395	ev_timer_start (EV_P_ struct ev_timer *w)
694	{	1396	{
695	if (ev_is_active (w))	1397	if (expect_false (ev_is_active (w)))
696	return;	1398	return;
697		1399
698	w->at += now;	1400	((WT)w)->at += mn_now;
699		1401
700	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1402	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
701		1403
702	ev_start ((W)w, ++timercnt);	1404	ev_start (EV_A_ (W)w, ++timercnt);
703	array_needsize (timers, timermax, timercnt, );	1405	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
704	timers [timercnt - 1] = w;	1406	timers [timercnt - 1] = w;
705	upheap ((WT *)timers, timercnt - 1);	1407	upheap ((WT *)timers, timercnt - 1);
706	}
707		1408
		1409	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1410	}
		1411
708	void	1412	void
709	evtimer_stop (struct ev_timer *w)	1413	ev_timer_stop (EV_P_ struct ev_timer *w)
710	{	1414	{
711	ev_clear ((W)w);	1415	ev_clear_pending (EV_A_ (W)w);
712	if (!ev_is_active (w))	1416	if (expect_false (!ev_is_active (w)))
713	return;	1417	return;
714		1418
		1419	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1420
715	if (w->active < timercnt--)	1421	if (expect_true (((W)w)->active < timercnt--))
716	{	1422	{
717	timers [w->active - 1] = timers [timercnt];	1423	timers [((W)w)->active - 1] = timers [timercnt];
718	downheap ((WT *)timers, timercnt, w->active - 1);	1424	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
719	}	1425	}
720		1426
721	w->at = w->repeat;	1427	((WT)w)->at -= mn_now;
722		1428
723	ev_stop ((W)w);	1429	ev_stop (EV_A_ (W)w);
724	}	1430	}
725		1431
726	void	1432	void
727	evtimer_again (struct ev_timer *w)	1433	ev_timer_again (EV_P_ struct ev_timer *w)
728	{	1434	{
729	if (ev_is_active (w))	1435	if (ev_is_active (w))
730	{	1436	{
731	if (w->repeat)	1437	if (w->repeat)
732	{	1438	{
733	w->at = now + w->repeat;	1439	((WT)w)->at = mn_now + w->repeat;
734	downheap ((WT *)timers, timercnt, w->active - 1);	1440	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
735	}	1441	}
736	else	1442	else
737	evtimer_stop (w);	1443	ev_timer_stop (EV_A_ w);
738	}	1444	}
739	else if (w->repeat)	1445	else if (w->repeat)
		1446	{
		1447	w->at = w->repeat;
740	evtimer_start (w);	1448	ev_timer_start (EV_A_ w);
		1449	}
741	}	1450	}
742		1451
		1452	#if EV_PERIODICS
743	void	1453	void
744	evperiodic_start (struct ev_periodic *w)	1454	ev_periodic_start (EV_P_ struct ev_periodic *w)
745	{	1455	{
746	if (ev_is_active (w))	1456	if (expect_false (ev_is_active (w)))
747	return;	1457	return;
748		1458
749	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1459	if (w->reschedule_cb)
750		1460	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1461	else if (w->interval)
		1462	{
		1463	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 */	1464	/* 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;	1465	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1466	}
754		1467
755	ev_start ((W)w, ++periodiccnt);	1468	ev_start (EV_A_ (W)w, ++periodiccnt);
756	array_needsize (periodics, periodicmax, periodiccnt, );	1469	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
757	periodics [periodiccnt - 1] = w;	1470	periodics [periodiccnt - 1] = w;
758	upheap ((WT *)periodics, periodiccnt - 1);	1471	upheap ((WT *)periodics, periodiccnt - 1);
759	}
760		1472
		1473	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1474	}
		1475
761	void	1476	void
762	evperiodic_stop (struct ev_periodic *w)	1477	ev_periodic_stop (EV_P_ struct ev_periodic *w)
763	{	1478	{
764	ev_clear ((W)w);	1479	ev_clear_pending (EV_A_ (W)w);
765	if (!ev_is_active (w))	1480	if (expect_false (!ev_is_active (w)))
766	return;	1481	return;
767		1482
		1483	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1484
768	if (w->active < periodiccnt--)	1485	if (expect_true (((W)w)->active < periodiccnt--))
769	{	1486	{
770	periodics [w->active - 1] = periodics [periodiccnt];	1487	periodics [((W)w)->active - 1] = periodics [periodiccnt];
771	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1488	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
772	}	1489	}
773		1490
774	ev_stop ((W)w);	1491	ev_stop (EV_A_ (W)w);
775	}	1492	}
776		1493
777	void	1494	void
778	evsignal_start (struct ev_signal *w)	1495	ev_periodic_again (EV_P_ struct ev_periodic *w)
779	{	1496	{
		1497	/* TODO: use adjustheap and recalculation */
		1498	ev_periodic_stop (EV_A_ w);
		1499	ev_periodic_start (EV_A_ w);
		1500	}
		1501	#endif
		1502
		1503	void
		1504	ev_idle_start (EV_P_ struct ev_idle *w)
		1505	{
780	if (ev_is_active (w))	1506	if (expect_false (ev_is_active (w)))
781	return;	1507	return;
782		1508
		1509	ev_start (EV_A_ (W)w, ++idlecnt);
		1510	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1511	idles [idlecnt - 1] = w;
		1512	}
		1513
		1514	void
		1515	ev_idle_stop (EV_P_ struct ev_idle *w)
		1516	{
		1517	ev_clear_pending (EV_A_ (W)w);
		1518	if (expect_false (!ev_is_active (w)))
		1519	return;
		1520
		1521	idles [((W)w)->active - 1] = idles [--idlecnt];
		1522	ev_stop (EV_A_ (W)w);
		1523	}
		1524
		1525	void
		1526	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1527	{
		1528	if (expect_false (ev_is_active (w)))
		1529	return;
		1530
		1531	ev_start (EV_A_ (W)w, ++preparecnt);
		1532	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1533	prepares [preparecnt - 1] = w;
		1534	}
		1535
		1536	void
		1537	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1538	{
		1539	ev_clear_pending (EV_A_ (W)w);
		1540	if (expect_false (!ev_is_active (w)))
		1541	return;
		1542
		1543	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1544	ev_stop (EV_A_ (W)w);
		1545	}
		1546
		1547	void
		1548	ev_check_start (EV_P_ struct ev_check *w)
		1549	{
		1550	if (expect_false (ev_is_active (w)))
		1551	return;
		1552
		1553	ev_start (EV_A_ (W)w, ++checkcnt);
		1554	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1555	checks [checkcnt - 1] = w;
		1556	}
		1557
		1558	void
		1559	ev_check_stop (EV_P_ struct ev_check *w)
		1560	{
		1561	ev_clear_pending (EV_A_ (W)w);
		1562	if (expect_false (!ev_is_active (w)))
		1563	return;
		1564
		1565	checks [((W)w)->active - 1] = checks [--checkcnt];
		1566	ev_stop (EV_A_ (W)w);
		1567	}
		1568
		1569	#ifndef SA_RESTART
		1570	# define SA_RESTART 0
		1571	#endif
		1572
		1573	void
		1574	ev_signal_start (EV_P_ struct ev_signal *w)
		1575	{
		1576	#if EV_MULTIPLICITY
		1577	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1578	#endif
		1579	if (expect_false (ev_is_active (w)))
		1580	return;
		1581
		1582	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1583
783	ev_start ((W)w, 1);	1584	ev_start (EV_A_ (W)w, 1);
784	array_needsize (signals, signalmax, w->signum, signals_init);	1585	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
785	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1586	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
786		1587
787	if (!w->next)	1588	if (!((WL)w)->next)
788	{	1589	{
		1590	#if _WIN32
		1591	signal (w->signum, sighandler);
		1592	#else
789	struct sigaction sa;	1593	struct sigaction sa;
790	sa.sa_handler = sighandler;	1594	sa.sa_handler = sighandler;
791	sigfillset (&sa.sa_mask);	1595	sigfillset (&sa.sa_mask);
792	sa.sa_flags = 0;	1596	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
793	sigaction (w->signum, &sa, 0);	1597	sigaction (w->signum, &sa, 0);
		1598	#endif
794	}	1599	}
795	}	1600	}
796		1601
797	void	1602	void
798	evsignal_stop (struct ev_signal *w)	1603	ev_signal_stop (EV_P_ struct ev_signal *w)
799	{	1604	{
800	ev_clear ((W)w);	1605	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1606	if (expect_false (!ev_is_active (w)))
802	return;	1607	return;
803		1608
804	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1609	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
805	ev_stop ((W)w);	1610	ev_stop (EV_A_ (W)w);
806		1611
807	if (!signals [w->signum - 1].head)	1612	if (!signals [w->signum - 1].head)
808	signal (w->signum, SIG_DFL);	1613	signal (w->signum, SIG_DFL);
809	}	1614	}
810		1615
811	void evidle_start (struct ev_idle *w)	1616	void
		1617	ev_child_start (EV_P_ struct ev_child *w)
812	{	1618	{
		1619	#if EV_MULTIPLICITY
		1620	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1621	#endif
813	if (ev_is_active (w))	1622	if (expect_false (ev_is_active (w)))
814	return;	1623	return;
815		1624
816	ev_start ((W)w, ++idlecnt);	1625	ev_start (EV_A_ (W)w, 1);
817	array_needsize (idles, idlemax, idlecnt, );	1626	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
818	idles [idlecnt - 1] = w;
819	}	1627	}
820		1628
821	void evidle_stop (struct ev_idle *w)	1629	void
		1630	ev_child_stop (EV_P_ struct ev_child *w)
822	{	1631	{
823	ev_clear ((W)w);	1632	ev_clear_pending (EV_A_ (W)w);
824	if (ev_is_active (w))	1633	if (expect_false (!ev_is_active (w)))
825	return;	1634	return;
826		1635
827	idles [w->active - 1] = idles [--idlecnt];	1636	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
828	ev_stop ((W)w);	1637	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	}	1638	}
850		1639
851	/*****************************************************************************/	1640	/*****************************************************************************/
852		1641
853	struct ev_once	1642	struct ev_once
…		…
857	void (*cb)(int revents, void *arg);	1646	void (*cb)(int revents, void *arg);
858	void *arg;	1647	void *arg;
859	};	1648	};
860		1649
861	static void	1650	static void
862	once_cb (struct ev_once *once, int revents)	1651	once_cb (EV_P_ struct ev_once *once, int revents)
863	{	1652	{
864	void (*cb)(int revents, void *arg) = once->cb;	1653	void (*cb)(int revents, void *arg) = once->cb;
865	void *arg = once->arg;	1654	void *arg = once->arg;
866		1655
867	evio_stop (&once->io);	1656	ev_io_stop (EV_A_ &once->io);
868	evtimer_stop (&once->to);	1657	ev_timer_stop (EV_A_ &once->to);
869	free (once);	1658	ev_free (once);
870		1659
871	cb (revents, arg);	1660	cb (revents, arg);
872	}	1661	}
873		1662
874	static void	1663	static void
875	once_cb_io (struct ev_io *w, int revents)	1664	once_cb_io (EV_P_ struct ev_io *w, int revents)
876	{	1665	{
877	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1666	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
878	}	1667	}
879		1668
880	static void	1669	static void
881	once_cb_to (struct ev_timer *w, int revents)	1670	once_cb_to (EV_P_ struct ev_timer *w, int revents)
882	{	1671	{
883	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1672	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
884	}	1673	}
885		1674
886	void	1675	void
887	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1676	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
888	{	1677	{
889	struct ev_once *once = malloc (sizeof (struct ev_once));	1678	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
890		1679
891	if (!once)	1680	if (expect_false (!once))
892	cb (EV_ERROR, arg);	1681	{
893	else	1682	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1683	return;
894	{	1684	}
		1685
895	once->cb = cb;	1686	once->cb = cb;
896	once->arg = arg;	1687	once->arg = arg;
897		1688
898	evw_init (&once->io, once_cb_io);	1689	ev_init (&once->io, once_cb_io);
899
900	if (fd >= 0)	1690	if (fd >= 0)
901	{	1691	{
902	evio_set (&once->io, fd, events);	1692	ev_io_set (&once->io, fd, events);
903	evio_start (&once->io);	1693	ev_io_start (EV_A_ &once->io);
904	}	1694	}
905		1695
906	evw_init (&once->to, once_cb_to);	1696	ev_init (&once->to, once_cb_to);
907
908	if (timeout >= 0.)	1697	if (timeout >= 0.)
909	{	1698	{
910	evtimer_set (&once->to, timeout, 0.);	1699	ev_timer_set (&once->to, timeout, 0.);
911	evtimer_start (&once->to);	1700	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	{	1701	}
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	}	1702	}
993		1703
		1704	#ifdef __cplusplus
		1705	}
994	#endif	1706	#endif
995		1707
996
997
998

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