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Comparing libev/ev.c (file contents):
Revision 1.13 by root, Wed Oct 31 10:50:05 2007 UTC vs.
Revision 1.132 by root, Fri Nov 23 10:36:30 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		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
1	#include <math.h>	97	#include <math.h>
2	#include <stdlib.h>	98	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	99	#include <fcntl.h>
5	#include <signal.h>	100	#include <stddef.h>
6		101
7	#include <stdio.h>	102	#include <stdio.h>
8		103
9	#include <assert.h>	104	#include <assert.h>
10	#include <errno.h>	105	#include <errno.h>
11	#include <sys/time.h>	106	#include <sys/types.h>
12	#include <time.h>	107	#include <time.h>
13		108
14	#define HAVE_EPOLL 1	109	#include <signal.h>
15		110
16	#ifndef HAVE_MONOTONIC	111	#ifndef _WIN32
17	# ifdef CLOCK_MONOTONIC	112	# include <unistd.h>
18	# 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
19	# endif	120	# endif
20	#endif	121	#endif
21		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
22	#ifndef HAVE_SELECT	133	#ifndef EV_USE_SELECT
23	# 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
24	#endif	142	# endif
		143	#endif
25		144
26	#ifndef HAVE_EPOLL	145	#ifndef EV_USE_EPOLL
27	# define HAVE_EPOLL 0	146	# define EV_USE_EPOLL 0
28	#endif	147	#endif
29		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
30	#ifndef HAVE_REALTIME	164	#ifndef CLOCK_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	165	# undef EV_USE_REALTIME
		166	# define EV_USE_REALTIME 0
32	#endif	167	#endif
		168
		169	#if EV_SELECT_IS_WINSOCKET
		170	# include <winsock.h>
		171	#endif
		172
		173	/**/
33		174
34	#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) */
35	#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 */
36		179
		180	#ifdef EV_H
		181	# include EV_H
		182	#else
37	#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 */
38		202
39	typedef struct ev_watcher *W;	203	typedef struct ev_watcher *W;
40	typedef struct ev_watcher_list *WL;	204	typedef struct ev_watcher_list *WL;
41	typedef struct ev_watcher_time *WT;	205	typedef struct ev_watcher_time *WT;
42		206
43	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
44	ev_tstamp ev_now;	296	ev_tstamp ev_rt_now;
45	int ev_method;	297	#define VAR(name,decl) static decl;
		298	#include "ev_vars.h"
		299	#undef VAR
46		300
47	static int have_monotonic; /* runtime */	301	static int ev_default_loop_ptr;
48		302
49	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	303	#endif
50	static void (*method_modify)(int fd, int oev, int nev);
51	static void (*method_poll)(ev_tstamp timeout);
52		304
53	/*****************************************************************************/	305	/*****************************************************************************/
54		306
55	ev_tstamp	307	ev_tstamp
56	ev_time (void)	308	ev_time (void)
57	{	309	{
58	#if HAVE_REALTIME	310	#if EV_USE_REALTIME
59	struct timespec ts;	311	struct timespec ts;
60	clock_gettime (CLOCK_REALTIME, &ts);	312	clock_gettime (CLOCK_REALTIME, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	313	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	#else	314	#else
63	struct timeval tv;	315	struct timeval tv;
64	gettimeofday (&tv, 0);	316	gettimeofday (&tv, 0);
65	return tv.tv_sec + tv.tv_usec * 1e-6;	317	return tv.tv_sec + tv.tv_usec * 1e-6;
66	#endif	318	#endif
67	}	319	}
68		320
69	static ev_tstamp	321	inline ev_tstamp
70	get_clock (void)	322	get_clock (void)
71	{	323	{
72	#if HAVE_MONOTONIC	324	#if EV_USE_MONOTONIC
73	if (have_monotonic)	325	if (expect_true (have_monotonic))
74	{	326	{
75	struct timespec ts;	327	struct timespec ts;
76	clock_gettime (CLOCK_MONOTONIC, &ts);	328	clock_gettime (CLOCK_MONOTONIC, &ts);
77	return ts.tv_sec + ts.tv_nsec * 1e-9;	329	return ts.tv_sec + ts.tv_nsec * 1e-9;
78	}	330	}
79	#endif	331	#endif
80		332
81	return ev_time ();	333	return ev_time ();
82	}	334	}
83		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
84	#define array_needsize(base,cur,cnt,init) \	346	#define array_needsize(type,base,cur,cnt,init) \
85	if ((cnt) > cur) \	347	if (expect_false ((cnt) > cur)) \
86	{ \	348	{ \
87	int newcnt = cur ? cur << 1 : 16; \	349	int newcnt = cur; \
88	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	350	do \
		351	{ \
		352	newcnt = array_roundsize (type, newcnt << 1); \
		353	} \
		354	while ((cnt) > newcnt); \
		355	\
89	base = realloc (base, sizeof (*base) * (newcnt)); \	356	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
90	init (base + cur, newcnt - cur); \	357	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	358	cur = newcnt; \
92	}	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;
93		371
94	/*****************************************************************************/	372	/*****************************************************************************/
95		373
96	typedef struct
97	{
98	struct ev_io *head;
99	unsigned char wev, rev; /* want, received event set */
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void	374	static void
109	anfds_init (ANFD *base, int count)	375	anfds_init (ANFD *base, int count)
110	{	376	{
111	while (count--)	377	while (count--)
112	{	378	{
113	base->head = 0;	379	base->head = 0;
114	base->wev = base->rev = EV_NONE;	380	base->events = EV_NONE;
		381	base->reify = 0;
		382
115	++base;	383	++base;
116	}	384	}
117	}	385	}
118		386
119	typedef struct	387	void
		388	ev_feed_event (EV_P_ void *w, int revents)
120	{	389	{
121	W w;	390	W w_ = (W)w;
122	int events;
123	} ANPENDING;
124		391
125	static ANPENDING *pendings;	392	if (expect_false (w_->pending))
126	static int pendingmax, pendingcnt;	393	{
		394	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		395	return;
		396	}
127		397
128	static void
129	event (W w, int events)
130	{
131	w->pending = ++pendingcnt;	398	w_->pending = ++pendingcnt [ABSPRI (w_)];
132	array_needsize (pendings, pendingmax, pendingcnt, );	399	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
133	pendings [pendingcnt - 1].w = w;	400	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
134	pendings [pendingcnt - 1].events = events;	401	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
135	}	402	}
136		403
137	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
138	fd_event (int fd, int events)	414	fd_event (EV_P_ int fd, int revents)
139	{	415	{
140	ANFD *anfd = anfds + fd;	416	ANFD *anfd = anfds + fd;
141	struct ev_io *w;	417	struct ev_io *w;
142		418
143	for (w = anfd->head; w; w = w->next)	419	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
144	{	420	{
145	int ev = w->events & events;	421	int ev = w->events & revents;
146		422
147	if (ev)	423	if (ev)
148	event ((W)w, ev);	424	ev_feed_event (EV_A_ (W)w, ev);
149	}	425	}
150	}	426	}
151		427
152	static void	428	void
153	queue_events (W *events, int eventcnt, int type)	429	ev_feed_fd_event (EV_P_ int fd, int revents)
154	{	430	{
155	int i;	431	fd_event (EV_A_ fd, revents);
156
157	for (i = 0; i < eventcnt; ++i)
158	event (events [i], type);
159	}	432	}
160		433
161	/*****************************************************************************/	434	/*****************************************************************************/
162		435
163	static struct ev_timer **timers;	436	inline void
164	static int timermax, timercnt;	437	fd_reify (EV_P)
165
166	static struct ev_periodic **periodics;
167	static int periodicmax, periodiccnt;
168
169	static void
170	upheap (WT *timers, int k)
171	{
172	WT w = timers [k];
173
174	while (k && timers [k >> 1]->at > w->at)
175	{
176	timers [k] = timers [k >> 1];
177	timers [k]->active = k + 1;
178	k >>= 1;
179	}
180
181	timers [k] = w;
182	timers [k]->active = k + 1;
183
184	}
185
186	static void
187	downheap (WT *timers, int N, int k)
188	{
189	WT w = timers [k];
190
191	while (k < (N >> 1))
192	{
193	int j = k << 1;
194
195	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
196	++j;
197
198	if (w->at <= timers [j]->at)
199	break;
200
201	timers [k] = timers [j];
202	timers [k]->active = k + 1;
203	k = j;
204	}
205
206	timers [k] = w;
207	timers [k]->active = k + 1;
208	}
209
210	/*****************************************************************************/
211
212	typedef struct
213	{
214	struct ev_signal *head;
215	sig_atomic_t gotsig;
216	} ANSIG;
217
218	static ANSIG *signals;
219	static int signalmax;
220
221	static int sigpipe [2];
222	static sig_atomic_t gotsig;
223	static struct ev_io sigev;
224
225	static void
226	signals_init (ANSIG *base, int count)
227	{
228	while (count--)
229	{
230	base->head = 0;
231	base->gotsig = 0;
232	++base;
233	}
234	}
235
236	static void
237	sighandler (int signum)
238	{
239	signals [signum - 1].gotsig = 1;
240
241	if (!gotsig)
242	{
243	gotsig = 1;
244	write (sigpipe [1], &gotsig, 1);
245	}
246	}
247
248	static void
249	sigcb (struct ev_io *iow, int revents)
250	{
251	struct ev_signal *w;
252	int sig;
253
254	gotsig = 0;
255	read (sigpipe [0], &revents, 1);
256
257	for (sig = signalmax; sig--; )
258	if (signals [sig].gotsig)
259	{
260	signals [sig].gotsig = 0;
261
262	for (w = signals [sig].head; w; w = w->next)
263	event ((W)w, EV_SIGNAL);
264	}
265	}
266
267	static void
268	siginit (void)
269	{
270	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
271	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272
273	/* rather than sort out wether we really need nb, set it */
274	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
275	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
276
277	evio_set (&sigev, sigpipe [0], EV_READ);
278	evio_start (&sigev);
279	}
280
281	/*****************************************************************************/
282
283	static struct ev_idle **idles;
284	static int idlemax, idlecnt;
285
286	static struct ev_check **checks;
287	static int checkmax, checkcnt;
288
289	/*****************************************************************************/
290
291	#if HAVE_EPOLL
292	# include "ev_epoll.c"
293	#endif
294	#if HAVE_SELECT
295	# include "ev_select.c"
296	#endif
297
298	int ev_init (int flags)
299	{
300	#if HAVE_MONOTONIC
301	{
302	struct timespec ts;
303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304	have_monotonic = 1;
305	}
306	#endif
307
308	ev_now = ev_time ();
309	now = get_clock ();
310	diff = ev_now - now;
311
312	if (pipe (sigpipe))
313	return 0;
314
315	ev_method = EVMETHOD_NONE;
316	#if HAVE_EPOLL
317	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
318	#endif
319	#if HAVE_SELECT
320	if (ev_method == EVMETHOD_NONE) select_init (flags);
321	#endif
322
323	if (ev_method)
324	{
325	evw_init (&sigev, sigcb);
326	siginit ();
327	}
328
329	return ev_method;
330	}
331
332	/*****************************************************************************/
333
334	void ev_prefork (void)
335	{
336	/* nop */
337	}
338
339	void ev_postfork_parent (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_child (void)
345	{
346	#if HAVE_EPOLL
347	if (ev_method == EVMETHOD_EPOLL)
348	epoll_postfork_child ();
349	#endif
350
351	evio_stop (&sigev);
352	close (sigpipe [0]);
353	close (sigpipe [1]);
354	pipe (sigpipe);
355	siginit ();
356	}
357
358	/*****************************************************************************/
359
360	static void
361	fd_reify (void)
362	{	438	{
363	int i;	439	int i;
364		440
365	for (i = 0; i < fdchangecnt; ++i)	441	for (i = 0; i < fdchangecnt; ++i)
366	{	442	{
367	int fd = fdchanges [i];	443	int fd = fdchanges [i];
368	ANFD *anfd = anfds + fd;	444	ANFD *anfd = anfds + fd;
369	struct ev_io *w;	445	struct ev_io *w;
370		446
371	int wev = 0;	447	int events = 0;
372		448
373	for (w = anfd->head; w; w = w->next)	449	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
374	wev |= w->events;	450	events |= w->events;
375		451
376	if (anfd->wev != wev)	452	#if EV_SELECT_IS_WINSOCKET
		453	if (events)
377	{	454	{
378	method_modify (fd, anfd->wev, wev);	455	unsigned long argp;
379	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));
380	}	458	}
		459	#endif
		460
		461	anfd->reify = 0;
		462
		463	backend_modify (EV_A_ fd, anfd->events, events);
		464	anfd->events = events;
381	}	465	}
382		466
383	fdchangecnt = 0;	467	fdchangecnt = 0;
384	}	468	}
385		469
386	static void	470	static void
387	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)
388	{	872	{
389	int i;	873	int i;
390		874
391	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);
392	{	933	}
393	ANPENDING *p = pendings + i;
394		934
395	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))
396	{	992	{
397	p->w->pending = 0;	993	siginit (EV_A);
398	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
399	}	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	}
400	}	1070	}
401
402	pendingcnt = 0;
403	}	1071	}
404		1072
405	static void	1073	inline void
406	timers_reify ()	1074	timers_reify (EV_P)
407	{	1075	{
408	while (timercnt && timers [0]->at <= now)	1076	while (timercnt && ((WT)timers [0])->at <= mn_now)
409	{	1077	{
410	struct ev_timer *w = timers [0];	1078	struct ev_timer *w = timers [0];
		1079
		1080	assert (("inactive timer on timer heap detected", ev_is_active (w)));
411		1081
412	/* first reschedule or stop timer */	1082	/* first reschedule or stop timer */
413	if (w->repeat)	1083	if (w->repeat)
414	{	1084	{
		1085	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1086
415	w->at = now + w->repeat;	1087	((WT)w)->at += w->repeat;
416	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
417	downheap ((WT *)timers, timercnt, 0);	1091	downheap ((WT *)timers, timercnt, 0);
418	}	1092	}
419	else	1093	else
420	evtimer_stop (w); /* nonrepeating: stop timer */	1094	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421		1095
422	event ((W)w, EV_TIMEOUT);	1096	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
423	}	1097	}
424	}	1098	}
425		1099
426	static void	1100	#if EV_PERIODICS
		1101	inline void
427	periodics_reify ()	1102	periodics_reify (EV_P)
428	{	1103	{
429	while (periodiccnt && periodics [0]->at <= ev_now)	1104	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
430	{	1105	{
431	struct ev_periodic *w = periodics [0];	1106	struct ev_periodic *w = periodics [0];
432		1107
		1108	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1109
433	/* first reschedule or stop timer */	1110	/* first reschedule or stop timer */
434	if (w->interval)	1111	if (w->reschedule_cb)
435	{	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	{
436	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;
437	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));
438	downheap ((WT *)periodics, periodiccnt, 0);	1121	downheap ((WT *)periodics, periodiccnt, 0);
439	}	1122	}
440	else	1123	else
441	evperiodic_stop (w); /* nonrepeating: stop timer */	1124	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442		1125
443	event ((W)w, EV_TIMEOUT);	1126	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
444	}	1127	}
445	}	1128	}
446		1129
447	static void	1130	static void
448	periodics_reschedule (ev_tstamp diff)	1131	periodics_reschedule (EV_P)
449	{	1132	{
450	int i;	1133	int i;
451		1134
452	/* adjust periodics after time jump */	1135	/* adjust periodics after time jump */
453	for (i = 0; i < periodiccnt; ++i)	1136	for (i = 0; i < periodiccnt; ++i)
454	{	1137	{
455	struct ev_periodic *w = periodics [i];	1138	struct ev_periodic *w = periodics [i];
456		1139
		1140	if (w->reschedule_cb)
		1141	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
457	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))
458	{	1179	{
459	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1180	ev_tstamp odiff = rtmn_diff;
460		1181
461	if (fabs (diff) >= 1e-4)	1182	for (i = 4; --i; ) /* loop a few times, before making important decisions */
462	{	1183	{
463	evperiodic_stop (w);	1184	rtmn_diff = ev_rt_now - mn_now;
464	evperiodic_start (w);
465		1185
466	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;
467	}	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) */
468	}	1199	}
469	}	1200	}
470	}	1201	else
471		1202	#endif
472	static void	1203	{
473	time_update ()
474	{
475	int i;
476
477	ev_now = ev_time ();	1204	ev_rt_now = ev_time ();
478		1205
479	if (have_monotonic)	1206	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
480	{
481	ev_tstamp odiff = diff;
482
483	for (i = 4; --i; ) /* loop a few times, before making important decisions */
484	{	1207	{
485	now = get_clock ();	1208	#if EV_PERIODICS
486	diff = ev_now - now;
487
488	if (fabs (odiff - diff) < MIN_TIMEJUMP)
489	return; /* all is well */
490
491	ev_now = ev_time ();
492	}
493
494	periodics_reschedule (diff - odiff);
495	/* no timer adjustment, as the monotonic clock doesn't jump */
496	}
497	else
498	{
499	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
500	{
501	periodics_reschedule (ev_now - now);	1209	periodics_reschedule (EV_A);
		1210	#endif
502		1211
503	/* 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 */
504	for (i = 0; i < timercnt; ++i)	1213	for (i = 0; i < timercnt; ++i)
505	timers [i]->at += diff;	1214	((WT)timers [i])->at += ev_rt_now - mn_now;
506	}	1215	}
507		1216
508	now = ev_now;	1217	mn_now = ev_rt_now;
509	}	1218	}
510	}	1219	}
511		1220
512	int ev_loop_done;	1221	void
		1222	ev_ref (EV_P)
		1223	{
		1224	++activecnt;
		1225	}
513		1226
		1227	void
		1228	ev_unref (EV_P)
		1229	{
		1230	--activecnt;
		1231	}
		1232
		1233	static int loop_done;
		1234
		1235	void
514	void ev_loop (int flags)	1236	ev_loop (EV_P_ int flags)
515	{	1237	{
516	double block;	1238	double block;
517	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1239	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
518		1240
519	if (checkcnt)	1241	while (activecnt)
520	{	1242	{
521	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);
522	call_pending ();	1247	call_pending (EV_A);
523	}	1248	}
524		1249
525	do	1250	/* we might have forked, so reify kernel state if necessary */
526	{	1251	if (expect_false (postfork))
		1252	loop_fork (EV_A);
		1253
527	/* update fd-related kernel structures */	1254	/* update fd-related kernel structures */
528	fd_reify ();	1255	fd_reify (EV_A);
529		1256
530	/* calculate blocking time */	1257	/* calculate blocking time */
531		1258
532	/* 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	{
533	ev_now = ev_time ();	1267	ev_rt_now = ev_time ();
		1268	mn_now = ev_rt_now;
		1269	}
534		1270
535	if (flags & EVLOOP_NONBLOCK || idlecnt)	1271	if (flags & EVLOOP_NONBLOCK || idlecnt)
536	block = 0.;	1272	block = 0.;
537	else	1273	else
538	{	1274	{
539	block = MAX_BLOCKTIME;	1275	block = MAX_BLOCKTIME;
540		1276
541	if (timercnt)	1277	if (timercnt)
542	{	1278	{
543	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	1279	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
544	if (block > to) block = to;	1280	if (block > to) block = to;
545	}	1281	}
546		1282
		1283	#if EV_PERIODICS
547	if (periodiccnt)	1284	if (periodiccnt)
548	{	1285	{
549	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1286	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
550	if (block > to) block = to;	1287	if (block > to) block = to;
551	}	1288	}
		1289	#endif
552		1290
553	if (block < 0.) block = 0.;	1291	if (expect_false (block < 0.)) block = 0.;
554	}	1292	}
555		1293
556	method_poll (block);	1294	backend_poll (EV_A_ block);
557		1295
558	/* update ev_now, do magic */	1296	/* update ev_rt_now, do magic */
559	time_update ();	1297	time_update (EV_A);
560		1298
561	/* 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
562	periodics_reify (); /* absolute timers first */	1302	periodics_reify (EV_A); /* absolute timers called first */
563	timers_reify (); /* relative timers second */	1303	#endif
564		1304
565	/* queue idle watchers unless io or timers are pending */	1305	/* queue idle watchers unless io or timers are pending */
566	if (!pendingcnt)	1306	if (idlecnt && !any_pending (EV_A))
567	queue_events ((W *)idles, idlecnt, EV_IDLE);	1307	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
568		1308
569	/* queue check and possibly idle watchers */	1309	/* queue check watchers, to be executed first */
		1310	if (expect_false (checkcnt))
570	queue_events ((W *)checks, checkcnt, EV_CHECK);	1311	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571		1312
572	call_pending ();	1313	call_pending (EV_A);
573	}
574	while (!ev_loop_done);
575		1314
		1315	if (expect_false (loop_done))
		1316	break;
		1317	}
		1318
576	if (ev_loop_done != 2)	1319	if (loop_done != 2)
577	ev_loop_done = 0;	1320	loop_done = 0;
		1321	}
		1322
		1323	void
		1324	ev_unloop (EV_P_ int how)
		1325	{
		1326	loop_done = how;
578	}	1327	}
579		1328
580	/*****************************************************************************/	1329	/*****************************************************************************/
581		1330
582	static void	1331	inline void
583	wlist_add (WL *head, WL elem)	1332	wlist_add (WL *head, WL elem)
584	{	1333	{
585	elem->next = *head;	1334	elem->next = *head;
586	*head = elem;	1335	*head = elem;
587	}	1336	}
588		1337
589	static void	1338	inline void
590	wlist_del (WL *head, WL elem)	1339	wlist_del (WL *head, WL elem)
591	{	1340	{
592	while (*head)	1341	while (*head)
593	{	1342	{
594	if (*head == elem)	1343	if (*head == elem)
…		…
599		1348
600	head = &(*head)->next;	1349	head = &(*head)->next;
601	}	1350	}
602	}	1351	}
603		1352
604	static void	1353	inline void
		1354	ev_clear_pending (EV_P_ W w)
		1355	{
		1356	if (w->pending)
		1357	{
		1358	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1359	w->pending = 0;
		1360	}
		1361	}
		1362
		1363	inline void
605	ev_start (W w, int active)	1364	ev_start (EV_P_ W w, int active)
606	{	1365	{
607	w->pending = 0;	1366	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1367	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1368
608	w->active = active;	1369	w->active = active;
		1370	ev_ref (EV_A);
609	}	1371	}
610		1372
611	static void	1373	inline void
612	ev_stop (W w)	1374	ev_stop (EV_P_ W w)
613	{	1375	{
614	if (w->pending)	1376	ev_unref (EV_A);
615	pendings [w->pending - 1].w = 0;
616
617	w->active = 0;	1377	w->active = 0;
618	}	1378	}
619		1379
620	/*****************************************************************************/	1380	/*****************************************************************************/
621		1381
622	void	1382	void
623	evio_start (struct ev_io *w)	1383	ev_io_start (EV_P_ struct ev_io *w)
624	{	1384	{
		1385	int fd = w->fd;
		1386
625	if (ev_is_active (w))	1387	if (expect_false (ev_is_active (w)))
626	return;	1388	return;
627		1389
628	int fd = w->fd;	1390	assert (("ev_io_start called with negative fd", fd >= 0));
629		1391
630	ev_start ((W)w, 1);	1392	ev_start (EV_A_ (W)w, 1);
631	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1393	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
632	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1394	wlist_add ((WL *)&anfds[fd].head, (WL)w);
633		1395
634	++fdchangecnt;	1396	fd_change (EV_A_ fd);
635	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
636	fdchanges [fdchangecnt - 1] = fd;
637	}	1397	}
638		1398
639	void	1399	void
640	evio_stop (struct ev_io *w)	1400	ev_io_stop (EV_P_ struct ev_io *w)
641	{	1401	{
		1402	ev_clear_pending (EV_A_ (W)w);
642	if (!ev_is_active (w))	1403	if (expect_false (!ev_is_active (w)))
643	return;	1404	return;
644		1405
		1406	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1407
645	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1408	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
646	ev_stop ((W)w);	1409	ev_stop (EV_A_ (W)w);
647		1410
648	++fdchangecnt;	1411	fd_change (EV_A_ w->fd);
649	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650	fdchanges [fdchangecnt - 1] = w->fd;
651	}	1412	}
652		1413
653
654	void	1414	void
655	evtimer_start (struct ev_timer *w)	1415	ev_timer_start (EV_P_ struct ev_timer *w)
656	{	1416	{
657	if (ev_is_active (w))	1417	if (expect_false (ev_is_active (w)))
658	return;	1418	return;
659		1419
660	w->at += now;	1420	((WT)w)->at += mn_now;
661		1421
662	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.));
663		1423
664	ev_start ((W)w, ++timercnt);	1424	ev_start (EV_A_ (W)w, ++timercnt);
665	array_needsize (timers, timermax, timercnt, );	1425	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
666	timers [timercnt - 1] = w;	1426	timers [timercnt - 1] = w;
667	upheap ((WT *)timers, timercnt - 1);	1427	upheap ((WT *)timers, timercnt - 1);
668	}
669		1428
		1429	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1430	}
		1431
670	void	1432	void
671	evtimer_stop (struct ev_timer *w)	1433	ev_timer_stop (EV_P_ struct ev_timer *w)
672	{	1434	{
		1435	ev_clear_pending (EV_A_ (W)w);
673	if (!ev_is_active (w))	1436	if (expect_false (!ev_is_active (w)))
674	return;	1437	return;
675		1438
		1439	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1440
676	if (w->active < timercnt--)	1441	if (expect_true (((W)w)->active < timercnt--))
677	{	1442	{
678	timers [w->active - 1] = timers [timercnt];	1443	timers [((W)w)->active - 1] = timers [timercnt];
679	downheap ((WT *)timers, timercnt, w->active - 1);	1444	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
680	}	1445	}
681		1446
		1447	((WT)w)->at -= mn_now;
		1448
682	ev_stop ((W)w);	1449	ev_stop (EV_A_ (W)w);
683	}	1450	}
684		1451
685	void	1452	void
686	evperiodic_start (struct ev_periodic *w)	1453	ev_timer_again (EV_P_ struct ev_timer *w)
687	{	1454	{
688	if (ev_is_active (w))	1455	if (ev_is_active (w))
		1456	{
		1457	if (w->repeat)
		1458	{
		1459	((WT)w)->at = mn_now + w->repeat;
		1460	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1461	}
		1462	else
		1463	ev_timer_stop (EV_A_ w);
		1464	}
		1465	else if (w->repeat)
		1466	{
		1467	w->at = w->repeat;
		1468	ev_timer_start (EV_A_ w);
		1469	}
		1470	}
		1471
		1472	#if EV_PERIODICS
		1473	void
		1474	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1475	{
		1476	if (expect_false (ev_is_active (w)))
689	return;	1477	return;
690		1478
691	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1479	if (w->reschedule_cb)
692		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.));
693	/* 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 */
694	if (w->interval)
695	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	}
696		1487
697	ev_start ((W)w, ++periodiccnt);	1488	ev_start (EV_A_ (W)w, ++periodiccnt);
698	array_needsize (periodics, periodicmax, periodiccnt, );	1489	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
699	periodics [periodiccnt - 1] = w;	1490	periodics [periodiccnt - 1] = w;
700	upheap ((WT *)periodics, periodiccnt - 1);	1491	upheap ((WT *)periodics, periodiccnt - 1);
701	}
702		1492
		1493	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1494	}
		1495
703	void	1496	void
704	evperiodic_stop (struct ev_periodic *w)	1497	ev_periodic_stop (EV_P_ struct ev_periodic *w)
705	{	1498	{
		1499	ev_clear_pending (EV_A_ (W)w);
706	if (!ev_is_active (w))	1500	if (expect_false (!ev_is_active (w)))
707	return;	1501	return;
708		1502
		1503	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1504
709	if (w->active < periodiccnt--)	1505	if (expect_true (((W)w)->active < periodiccnt--))
710	{	1506	{
711	periodics [w->active - 1] = periodics [periodiccnt];	1507	periodics [((W)w)->active - 1] = periodics [periodiccnt];
712	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1508	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
713	}	1509	}
714		1510
715	ev_stop ((W)w);	1511	ev_stop (EV_A_ (W)w);
716	}	1512	}
717		1513
718	void	1514	void
719	evsignal_start (struct ev_signal *w)	1515	ev_periodic_again (EV_P_ struct ev_periodic *w)
720	{	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	{
721	if (ev_is_active (w))	1526	if (expect_false (ev_is_active (w)))
722	return;	1527	return;
723		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
724	ev_start ((W)w, 1);	1604	ev_start (EV_A_ (W)w, 1);
725	array_needsize (signals, signalmax, w->signum, signals_init);	1605	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
726	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1606	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
727		1607
728	if (!w->next)	1608	if (!((WL)w)->next)
729	{	1609	{
		1610	#if _WIN32
		1611	signal (w->signum, sighandler);
		1612	#else
730	struct sigaction sa;	1613	struct sigaction sa;
731	sa.sa_handler = sighandler;	1614	sa.sa_handler = sighandler;
732	sigfillset (&sa.sa_mask);	1615	sigfillset (&sa.sa_mask);
733	sa.sa_flags = 0;	1616	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
734	sigaction (w->signum, &sa, 0);	1617	sigaction (w->signum, &sa, 0);
		1618	#endif
735	}	1619	}
736	}	1620	}
737		1621
738	void	1622	void
739	evsignal_stop (struct ev_signal *w)	1623	ev_signal_stop (EV_P_ struct ev_signal *w)
740	{	1624	{
		1625	ev_clear_pending (EV_A_ (W)w);
741	if (!ev_is_active (w))	1626	if (expect_false (!ev_is_active (w)))
742	return;	1627	return;
743		1628
744	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1629	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
745	ev_stop ((W)w);	1630	ev_stop (EV_A_ (W)w);
746		1631
747	if (!signals [w->signum - 1].head)	1632	if (!signals [w->signum - 1].head)
748	signal (w->signum, SIG_DFL);	1633	signal (w->signum, SIG_DFL);
749	}	1634	}
750		1635
751	void evidle_start (struct ev_idle *w)	1636	void
		1637	ev_child_start (EV_P_ struct ev_child *w)
752	{	1638	{
		1639	#if EV_MULTIPLICITY
		1640	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1641	#endif
753	if (ev_is_active (w))	1642	if (expect_false (ev_is_active (w)))
754	return;	1643	return;
755		1644
756	ev_start ((W)w, ++idlecnt);	1645	ev_start (EV_A_ (W)w, 1);
757	array_needsize (idles, idlemax, idlecnt, );	1646	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
758	idles [idlecnt - 1] = w;
759	}	1647	}
760		1648
761	void evidle_stop (struct ev_idle *w)	1649	void
		1650	ev_child_stop (EV_P_ struct ev_child *w)
762	{	1651	{
763	idles [w->active - 1] = idles [--idlecnt];	1652	ev_clear_pending (EV_A_ (W)w);
764	ev_stop ((W)w);	1653	if (expect_false (!ev_is_active (w)))
765	}
766
767	void evcheck_start (struct ev_check *w)
768	{
769	if (ev_is_active (w))
770	return;	1654	return;
771		1655
772	ev_start ((W)w, ++checkcnt);	1656	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
773	array_needsize (checks, checkmax, checkcnt, );
774	checks [checkcnt - 1] = w;
775	}
776
777	void evcheck_stop (struct ev_check *w)
778	{
779	checks [w->active - 1] = checks [--checkcnt];
780	ev_stop ((W)w);	1657	ev_stop (EV_A_ (W)w);
781	}	1658	}
782		1659
783	/*****************************************************************************/	1660	/*****************************************************************************/
784		1661
785	#if 0	1662	struct ev_once
786		1663	{
787	struct ev_io wio;	1664	struct ev_io io;
788
789	static void
790	sin_cb (struct ev_io *w, int revents)
791	{
792	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
793	}
794
795	static void
796	ocb (struct ev_timer *w, int revents)
797	{
798	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
799	evtimer_stop (w);
800	evtimer_start (w);
801	}
802
803	static void
804	scb (struct ev_signal *w, int revents)
805	{
806	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
807	evio_stop (&wio);
808	evio_start (&wio);
809	}
810
811	static void
812	gcb (struct ev_signal *w, int revents)
813	{
814	fprintf (stderr, "generic %x\n", revents);
815
816	}
817
818	int main (void)
819	{
820	ev_init (0);
821
822	evio_init (&wio, sin_cb, 0, EV_READ);
823	evio_start (&wio);
824
825	struct ev_timer t[10000];
826
827	#if 0
828	int i;
829	for (i = 0; i < 10000; ++i)
830	{
831	struct ev_timer *w = t + i;
832	evw_init (w, ocb, i);
833	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
834	evtimer_start (w);
835	if (drand48 () < 0.5)
836	evtimer_stop (w);
837	}
838	#endif
839
840	struct ev_timer t1;	1665	struct ev_timer to;
841	evtimer_init (&t1, ocb, 5, 10);	1666	void (*cb)(int revents, void *arg);
842	evtimer_start (&t1);	1667	void *arg;
		1668	};
843		1669
844	struct ev_signal sig;	1670	static void
845	evsignal_init (&sig, scb, SIGQUIT);	1671	once_cb (EV_P_ struct ev_once *once, int revents)
846	evsignal_start (&sig);	1672	{
		1673	void (*cb)(int revents, void *arg) = once->cb;
		1674	void *arg = once->arg;
847		1675
848	struct ev_check cw;	1676	ev_io_stop (EV_A_ &once->io);
849	evcheck_init (&cw, gcb);	1677	ev_timer_stop (EV_A_ &once->to);
850	evcheck_start (&cw);	1678	ev_free (once);
851		1679
852	struct ev_idle iw;	1680	cb (revents, arg);
853	evidle_init (&iw, gcb);	1681	}
854	evidle_start (&iw);
855		1682
856	ev_loop (0);	1683	static void
		1684	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1685	{
		1686	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1687	}
857		1688
		1689	static void
		1690	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1691	{
		1692	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1693	}
		1694
		1695	void
		1696	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1697	{
		1698	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
		1699
		1700	if (expect_false (!once))
		1701	{
		1702	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
858	return 0;	1703	return;
859	}	1704	}
860		1705
861	#endif	1706	once->cb = cb;
		1707	once->arg = arg;
862		1708
		1709	ev_init (&once->io, once_cb_io);
		1710	if (fd >= 0)
		1711	{
		1712	ev_io_set (&once->io, fd, events);
		1713	ev_io_start (EV_A_ &once->io);
		1714	}
863		1715
		1716	ev_init (&once->to, once_cb_to);
		1717	if (timeout >= 0.)
		1718	{
		1719	ev_timer_set (&once->to, timeout, 0.);
		1720	ev_timer_start (EV_A_ &once->to);
		1721	}
		1722	}
864		1723
		1724	#ifdef __cplusplus
		1725	}
		1726	#endif
865		1727

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