[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.133 by root, Fri Nov 23 11:32:22 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	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	#endif
		100
1	#include <math.h>	101	#include <math.h>
2	#include <stdlib.h>	102	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	103	#include <fcntl.h>
5	#include <signal.h>	104	#include <stddef.h>
6		105
7	#include <stdio.h>	106	#include <stdio.h>
8		107
9	#include <assert.h>	108	#include <assert.h>
10	#include <errno.h>	109	#include <errno.h>
11	#include <sys/time.h>	110	#include <sys/types.h>
12	#include <time.h>	111	#include <time.h>
13		112
14	#ifndef HAVE_MONOTONIC	113	#include <signal.h>
15	# ifdef CLOCK_MONOTONIC	114
16	# define HAVE_MONOTONIC 1	115	#ifndef _WIN32
		116	# include <unistd.h>
		117	# include <sys/time.h>
		118	# include <sys/wait.h>
		119	#else
		120	# define WIN32_LEAN_AND_MEAN
		121	# include <windows.h>
		122	# ifndef EV_SELECT_IS_WINSOCKET
		123	# define EV_SELECT_IS_WINSOCKET 1
17	# endif	124	# endif
18	#endif	125	#endif
19		126
		127	/**/
		128
		129	#ifndef EV_USE_MONOTONIC
		130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
		135	#endif
		136
20	#ifndef HAVE_SELECT	137	#ifndef EV_USE_SELECT
21	# define HAVE_SELECT 1	138	# define EV_USE_SELECT 1
		139	#endif
		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
22	#endif	146	# endif
		147	#endif
23		148
24	#ifndef HAVE_EPOLL	149	#ifndef EV_USE_EPOLL
25	# define HAVE_EPOLL 0	150	# define EV_USE_EPOLL 0
26	#endif	151	#endif
27		152
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
		157	#ifndef EV_USE_PORT
		158	# define EV_USE_PORT 0
		159	#endif
		160
		161	/**/
		162
		163	#ifndef CLOCK_MONOTONIC
		164	# undef EV_USE_MONOTONIC
		165	# define EV_USE_MONOTONIC 0
		166	#endif
		167
28	#ifndef HAVE_REALTIME	168	#ifndef CLOCK_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	169	# undef EV_USE_REALTIME
		170	# define EV_USE_REALTIME 0
30	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
31		178
32	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
33	#define MAX_BLOCKTIME 60.	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		182	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds */
34		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
35	#include "ev.h"	187	# include "ev.h"
		188	#endif
36		189
37	struct ev_watcher {	190	#if __GNUC__ >= 3
38	EV_WATCHER (ev_watcher);	191	# define expect(expr,value) __builtin_expect ((expr),(value))
39	};	192	# define inline static inline
		193	#else
		194	# define expect(expr,value) (expr)
		195	# define inline static
		196	#endif
40		197
41	struct ev_watcher_list {	198	#define expect_false(expr) expect ((expr) != 0, 0)
42	EV_WATCHER_LIST (ev_watcher_list);	199	#define expect_true(expr) expect ((expr) != 0, 1)
43	};	200
		201	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		202	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		203
		204	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		205	#define EMPTY2(a,b) /* used to suppress some warnings */
44		206
45	typedef struct ev_watcher *W;	207	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	208	typedef struct ev_watcher_list *WL;
		209	typedef struct ev_watcher_time *WT;
47		210
48	static ev_tstamp now, diff; /* monotonic clock */	211	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		212
		213	#ifdef _WIN32
		214	# include "ev_win32.c"
		215	#endif
		216
		217	/*****************************************************************************/
		218
		219	static void (syserr_cb)(const char msg);
		220
		221	void ev_set_syserr_cb (void (cb)(const char msg))
		222	{
		223	syserr_cb = cb;
		224	}
		225
		226	static void
		227	syserr (const char *msg)
		228	{
		229	if (!msg)
		230	msg = "(libev) system error";
		231
		232	if (syserr_cb)
		233	syserr_cb (msg);
		234	else
		235	{
		236	perror (msg);
		237	abort ();
		238	}
		239	}
		240
		241	static void (alloc)(void *ptr, long size);
		242
		243	void ev_set_allocator (void (cb)(void *ptr, long size))
		244	{
		245	alloc = cb;
		246	}
		247
		248	static void *
		249	ev_realloc (void *ptr, long size)
		250	{
		251	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		252
		253	if (!ptr && size)
		254	{
		255	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		256	abort ();
		257	}
		258
		259	return ptr;
		260	}
		261
		262	#define ev_malloc(size) ev_realloc (0, (size))
		263	#define ev_free(ptr) ev_realloc ((ptr), 0)
		264
		265	/*****************************************************************************/
		266
		267	typedef struct
		268	{
		269	WL head;
		270	unsigned char events;
		271	unsigned char reify;
		272	#if EV_SELECT_IS_WINSOCKET
		273	SOCKET handle;
		274	#endif
		275	} ANFD;
		276
		277	typedef struct
		278	{
		279	W w;
		280	int events;
		281	} ANPENDING;
		282
		283	#if EV_MULTIPLICITY
		284
		285	struct ev_loop
		286	{
		287	ev_tstamp ev_rt_now;
		288	#define ev_rt_now ((loop)->ev_rt_now)
		289	#define VAR(name,decl) decl;
		290	#include "ev_vars.h"
		291	#undef VAR
		292	};
		293	#include "ev_wrap.h"
		294
		295	static struct ev_loop default_loop_struct;
		296	struct ev_loop *ev_default_loop_ptr;
		297
		298	#else
		299
49	ev_tstamp ev_now;	300	ev_tstamp ev_rt_now;
50	int ev_method;	301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
51		304
52	static int have_monotonic; /* runtime */	305	static int ev_default_loop_ptr;
53		306
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	307	#endif
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		308
58	/*****************************************************************************/	309	/*****************************************************************************/
59		310
60	ev_tstamp	311	ev_tstamp
61	ev_time (void)	312	ev_time (void)
62	{	313	{
63	#if HAVE_REALTIME	314	#if EV_USE_REALTIME
64	struct timespec ts;	315	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	316	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	317	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	318	#else
68	struct timeval tv;	319	struct timeval tv;
69	gettimeofday (&tv, 0);	320	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	321	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	322	#endif
72	}	323	}
73		324
74	static ev_tstamp	325	inline ev_tstamp
75	get_clock (void)	326	get_clock (void)
76	{	327	{
77	#if HAVE_MONOTONIC	328	#if EV_USE_MONOTONIC
78	if (have_monotonic)	329	if (expect_true (have_monotonic))
79	{	330	{
80	struct timespec ts;	331	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	332	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	333	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	334	}
84	#endif	335	#endif
85		336
86	return ev_time ();	337	return ev_time ();
87	}	338	}
88		339
		340	#if EV_MULTIPLICITY
		341	ev_tstamp
		342	ev_now (EV_P)
		343	{
		344	return ev_rt_now;
		345	}
		346	#endif
		347
		348	#define array_roundsize(type,n) (((n) \| 4) & ~3)
		349
89	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
90	if ((cnt) > cur) \	351	if (expect_false ((cnt) > cur)) \
91	{ \	352	{ \
92	int newcnt = cur ? cur << 1 : 16; \	353	int newcnt = cur; \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	354	do \
		355	{ \
		356	newcnt = array_roundsize (type, newcnt << 1); \
		357	} \
		358	while ((cnt) > newcnt); \
		359	\
94	base = realloc (base, sizeof (base) (newcnt)); \	360	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
95	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	362	cur = newcnt; \
97	}	363	}
		364
		365	#define array_slim(type,stem) \
		366	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		367	{ \
		368	stem ## max = array_roundsize (stem ## cnt >> 1); \
		369	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		370	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		371	}
		372
		373	#define array_free(stem, idx) \
		374	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
98		375
99	/*****************************************************************************/	376	/*****************************************************************************/
100		377
101	typedef struct
102	{
103	struct ev_io *head;
104	unsigned char wev, rev; /* want, received event set */
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	378	static void
114	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
115	{	380	{
116	while (count--)	381	while (count--)
117	{	382	{
118	base->head = 0;	383	base->head = 0;
119	base->wev = base->rev = EV_NONE;	384	base->events = EV_NONE;
		385	base->reify = 0;
		386
120	++base;	387	++base;
121	}	388	}
122	}	389	}
123		390
124	typedef struct	391	void
		392	ev_feed_event (EV_P_ void *w, int revents)
125	{	393	{
126	W w;	394	W w_ = (W)w;
127	int events;
128	} ANPENDING;
129		395
130	static ANPENDING *pendings;	396	if (expect_false (w_->pending))
131	static int pendingmax, pendingcnt;	397	{
		398	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		399	return;
		400	}
132		401
133	static void
134	event (W w, int events)
135	{
136	w->pending = ++pendingcnt;	402	w_->pending = ++pendingcnt [ABSPRI (w_)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	403	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
138	pendings [pendingcnt - 1].w = w;	404	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
139	pendings [pendingcnt - 1].events = events;	405	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
140	}	406	}
141		407
142	static void	408	static void
		409	queue_events (EV_P_ W *events, int eventcnt, int type)
		410	{
		411	int i;
		412
		413	for (i = 0; i < eventcnt; ++i)
		414	ev_feed_event (EV_A_ events [i], type);
		415	}
		416
		417	inline void
143	fd_event (int fd, int events)	418	fd_event (EV_P_ int fd, int revents)
144	{	419	{
145	ANFD *anfd = anfds + fd;	420	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	421	struct ev_io *w;
147		422
148	for (w = anfd->head; w; w = w->next)	423	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
149	{	424	{
150	int ev = w->events & events;	425	int ev = w->events & revents;
151		426
152	if (ev)	427	if (ev)
153	event ((W)w, ev);	428	ev_feed_event (EV_A_ (W)w, ev);
154	}	429	}
155	}	430	}
156		431
157	static void	432	void
158	queue_events (W *events, int eventcnt, int type)	433	ev_feed_fd_event (EV_P_ int fd, int revents)
159	{	434	{
160	int i;	435	fd_event (EV_A_ fd, revents);
161
162	for (i = 0; i < eventcnt; ++i)
163	event (events [i], type);
164	}	436	}
165		437
166	/*****************************************************************************/	438	/*****************************************************************************/
167		439
168	static struct ev_timer **atimers;	440	inline void
169	static int atimermax, atimercnt;	441	fd_reify (EV_P)
170
171	static struct ev_timer **rtimers;
172	static int rtimermax, rtimercnt;
173
174	static void
175	upheap (struct ev_timer **timers, int k)
176	{
177	struct ev_timer *w = timers [k];
178
179	while (k && timers [k >> 1]->at > w->at)
180	{
181	timers [k] = timers [k >> 1];
182	timers [k]->active = k + 1;
183	k >>= 1;
184	}
185
186	timers [k] = w;
187	timers [k]->active = k + 1;
188
189	}
190
191	static void
192	downheap (struct ev_timer **timers, int N, int k)
193	{
194	struct ev_timer *w = timers [k];
195
196	while (k < (N >> 1))
197	{
198	int j = k << 1;
199
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
201	++j;
202
203	if (w->at <= timers [j]->at)
204	break;
205
206	timers [k] = timers [j];
207	timers [k]->active = k + 1;
208	k = j;
209	}
210
211	timers [k] = w;
212	timers [k]->active = k + 1;
213	}
214
215	/*****************************************************************************/
216
217	typedef struct
218	{
219	struct ev_signal *head;
220	sig_atomic_t gotsig;
221	} ANSIG;
222
223	static ANSIG *signals;
224	static int signalmax;
225
226	static int sigpipe [2];
227	static sig_atomic_t gotsig;
228	static struct ev_io sigev;
229
230	static void
231	signals_init (ANSIG *base, int count)
232	{
233	while (count--)
234	{
235	base->head = 0;
236	base->gotsig = 0;
237	++base;
238	}
239	}
240
241	static void
242	sighandler (int signum)
243	{
244	signals [signum - 1].gotsig = 1;
245
246	if (!gotsig)
247	{
248	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);
250	}
251	}
252
253	static void
254	sigcb (struct ev_io *iow, int revents)
255	{
256	struct ev_signal *w;
257	int sig;
258
259	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261
262	for (sig = signalmax; sig--; )
263	if (signals [sig].gotsig)
264	{
265	signals [sig].gotsig = 0;
266
267	for (w = signals [sig].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);
269	}
270	}
271
272	static void
273	siginit (void)
274	{
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277
278	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
281
282	evio_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);
284	}
285
286	/*****************************************************************************/
287
288	static struct ev_idle **idles;
289	static int idlemax, idlecnt;
290
291	static struct ev_check **checks;
292	static int checkmax, checkcnt;
293
294	/*****************************************************************************/
295
296	#if HAVE_EPOLL
297	# include "ev_epoll.c"
298	#endif
299	#if HAVE_SELECT
300	# include "ev_select.c"
301	#endif
302
303	int ev_init (int flags)
304	{
305	#if HAVE_MONOTONIC
306	{
307	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;
310	}
311	#endif
312
313	ev_now = ev_time ();
314	now = get_clock ();
315	diff = ev_now - now;
316
317	if (pipe (sigpipe))
318	return 0;
319
320	ev_method = EVMETHOD_NONE;
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)
329	{
330	evw_init (&sigev, sigcb, 0);
331	siginit ();
332	}
333
334	return ev_method;
335	}
336
337	/*****************************************************************************/
338
339	void ev_prefork (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_parent (void)
345	{
346	/* nop */
347	}
348
349	void ev_postfork_child (void)
350	{
351	#if HAVE_EPOLL
352	if (ev_method == EVMETHOD_EPOLL)
353	epoll_postfork_child ();
354	#endif
355
356	evio_stop (&sigev);
357	close (sigpipe [0]);
358	close (sigpipe [1]);
359	pipe (sigpipe);
360	siginit ();
361	}
362
363	/*****************************************************************************/
364
365	static void
366	fd_reify (void)
367	{	442	{
368	int i;	443	int i;
369		444
370	for (i = 0; i < fdchangecnt; ++i)	445	for (i = 0; i < fdchangecnt; ++i)
371	{	446	{
372	int fd = fdchanges [i];	447	int fd = fdchanges [i];
373	ANFD *anfd = anfds + fd;	448	ANFD *anfd = anfds + fd;
374	struct ev_io *w;	449	struct ev_io *w;
375		450
376	int wev = 0;	451	int events = 0;
377		452
378	for (w = anfd->head; w; w = w->next)	453	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
379	wev \|= w->events;	454	events \|= w->events;
380		455
381	if (anfd->wev != wev)	456	#if EV_SELECT_IS_WINSOCKET
		457	if (events)
382	{	458	{
383	method_modify (fd, anfd->wev, wev);	459	unsigned long argp;
384	anfd->wev = wev;	460	anfd->handle = _get_osfhandle (fd);
		461	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
385	}	462	}
		463	#endif
		464
		465	anfd->reify = 0;
		466
		467	backend_modify (EV_A_ fd, anfd->events, events);
		468	anfd->events = events;
386	}	469	}
387		470
388	fdchangecnt = 0;	471	fdchangecnt = 0;
389	}	472	}
390		473
391	static void	474	static void
392	call_pending ()	475	fd_change (EV_P_ int fd)
		476	{
		477	if (expect_false (anfds [fd].reify))
		478	return;
		479
		480	anfds [fd].reify = 1;
		481
		482	++fdchangecnt;
		483	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		484	fdchanges [fdchangecnt - 1] = fd;
		485	}
		486
		487	static void
		488	fd_kill (EV_P_ int fd)
		489	{
		490	struct ev_io *w;
		491
		492	while ((w = (struct ev_io *)anfds [fd].head))
		493	{
		494	ev_io_stop (EV_A_ w);
		495	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		496	}
		497	}
		498
		499	inline int
		500	fd_valid (int fd)
		501	{
		502	#ifdef _WIN32
		503	return _get_osfhandle (fd) != -1;
		504	#else
		505	return fcntl (fd, F_GETFD) != -1;
		506	#endif
		507	}
		508
		509	/* called on EBADF to verify fds */
		510	static void
		511	fd_ebadf (EV_P)
		512	{
		513	int fd;
		514
		515	for (fd = 0; fd < anfdmax; ++fd)
		516	if (anfds [fd].events)
		517	if (!fd_valid (fd) == -1 && errno == EBADF)
		518	fd_kill (EV_A_ fd);
		519	}
		520
		521	/* called on ENOMEM in select/poll to kill some fds and retry */
		522	static void
		523	fd_enomem (EV_P)
		524	{
		525	int fd;
		526
		527	for (fd = anfdmax; fd--; )
		528	if (anfds [fd].events)
		529	{
		530	fd_kill (EV_A_ fd);
		531	return;
		532	}
		533	}
		534
		535	/* usually called after fork if backend needs to re-arm all fds from scratch */
		536	static void
		537	fd_rearm_all (EV_P)
		538	{
		539	int fd;
		540
		541	/* this should be highly optimised to not do anything but set a flag */
		542	for (fd = 0; fd < anfdmax; ++fd)
		543	if (anfds [fd].events)
		544	{
		545	anfds [fd].events = 0;
		546	fd_change (EV_A_ fd);
		547	}
		548	}
		549
		550	/*****************************************************************************/
		551
		552	static void
		553	upheap (WT *heap, int k)
		554	{
		555	WT w = heap [k];
		556
		557	while (k && heap [k >> 1]->at > w->at)
		558	{
		559	heap [k] = heap [k >> 1];
		560	((W)heap [k])->active = k + 1;
		561	k >>= 1;
		562	}
		563
		564	heap [k] = w;
		565	((W)heap [k])->active = k + 1;
		566
		567	}
		568
		569	static void
		570	downheap (WT *heap, int N, int k)
		571	{
		572	WT w = heap [k];
		573
		574	while (k < (N >> 1))
		575	{
		576	int j = k << 1;
		577
		578	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		579	++j;
		580
		581	if (w->at <= heap [j]->at)
		582	break;
		583
		584	heap [k] = heap [j];
		585	((W)heap [k])->active = k + 1;
		586	k = j;
		587	}
		588
		589	heap [k] = w;
		590	((W)heap [k])->active = k + 1;
		591	}
		592
		593	inline void
		594	adjustheap (WT *heap, int N, int k)
		595	{
		596	upheap (heap, k);
		597	downheap (heap, N, k);
		598	}
		599
		600	/*****************************************************************************/
		601
		602	typedef struct
		603	{
		604	WL head;
		605	sig_atomic_t volatile gotsig;
		606	} ANSIG;
		607
		608	static ANSIG *signals;
		609	static int signalmax;
		610
		611	static int sigpipe [2];
		612	static sig_atomic_t volatile gotsig;
		613	static struct ev_io sigev;
		614
		615	static void
		616	signals_init (ANSIG *base, int count)
		617	{
		618	while (count--)
		619	{
		620	base->head = 0;
		621	base->gotsig = 0;
		622
		623	++base;
		624	}
		625	}
		626
		627	static void
		628	sighandler (int signum)
		629	{
		630	#if _WIN32
		631	signal (signum, sighandler);
		632	#endif
		633
		634	signals [signum - 1].gotsig = 1;
		635
		636	if (!gotsig)
		637	{
		638	int old_errno = errno;
		639	gotsig = 1;
		640	write (sigpipe [1], &signum, 1);
		641	errno = old_errno;
		642	}
		643	}
		644
		645	void
		646	ev_feed_signal_event (EV_P_ int signum)
		647	{
		648	WL w;
		649
		650	#if EV_MULTIPLICITY
		651	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		652	#endif
		653
		654	--signum;
		655
		656	if (signum < 0 \|\| signum >= signalmax)
		657	return;
		658
		659	signals [signum].gotsig = 0;
		660
		661	for (w = signals [signum].head; w; w = w->next)
		662	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		663	}
		664
		665	static void
		666	sigcb (EV_P_ struct ev_io *iow, int revents)
		667	{
		668	int signum;
		669
		670	read (sigpipe [0], &revents, 1);
		671	gotsig = 0;
		672
		673	for (signum = signalmax; signum--; )
		674	if (signals [signum].gotsig)
		675	ev_feed_signal_event (EV_A_ signum + 1);
		676	}
		677
		678	static void
		679	fd_intern (int fd)
		680	{
		681	#ifdef _WIN32
		682	int arg = 1;
		683	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		684	#else
		685	fcntl (fd, F_SETFD, FD_CLOEXEC);
		686	fcntl (fd, F_SETFL, O_NONBLOCK);
		687	#endif
		688	}
		689
		690	static void
		691	siginit (EV_P)
		692	{
		693	fd_intern (sigpipe [0]);
		694	fd_intern (sigpipe [1]);
		695
		696	ev_io_set (&sigev, sigpipe [0], EV_READ);
		697	ev_io_start (EV_A_ &sigev);
		698	ev_unref (EV_A); /* child watcher should not keep loop alive */
		699	}
		700
		701	/*****************************************************************************/
		702
		703	static struct ev_child *childs [PID_HASHSIZE];
		704
		705	#ifndef _WIN32
		706
		707	static struct ev_signal childev;
		708
		709	#ifndef WCONTINUED
		710	# define WCONTINUED 0
		711	#endif
		712
		713	static void
		714	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		715	{
		716	struct ev_child *w;
		717
		718	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		719	if (w->pid == pid \|\| !w->pid)
		720	{
		721	ev_priority (w) = ev_priority (sw); /* need to do it now */
		722	w->rpid = pid;
		723	w->rstatus = status;
		724	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		725	}
		726	}
		727
		728	static void
		729	childcb (EV_P_ struct ev_signal *sw, int revents)
		730	{
		731	int pid, status;
		732
		733	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		734	{
		735	/* make sure we are called again until all childs have been reaped */
		736	/* we need to do it this way so that the callback gets called before we continue */
		737	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		738
		739	child_reap (EV_A_ sw, pid, pid, status);
		740	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		741	}
		742	}
		743
		744	#endif
		745
		746	/*****************************************************************************/
		747
		748	#if EV_USE_PORT
		749	# include "ev_port.c"
		750	#endif
		751	#if EV_USE_KQUEUE
		752	# include "ev_kqueue.c"
		753	#endif
		754	#if EV_USE_EPOLL
		755	# include "ev_epoll.c"
		756	#endif
		757	#if EV_USE_POLL
		758	# include "ev_poll.c"
		759	#endif
		760	#if EV_USE_SELECT
		761	# include "ev_select.c"
		762	#endif
		763
		764	int
		765	ev_version_major (void)
		766	{
		767	return EV_VERSION_MAJOR;
		768	}
		769
		770	int
		771	ev_version_minor (void)
		772	{
		773	return EV_VERSION_MINOR;
		774	}
		775
		776	/* return true if we are running with elevated privileges and should ignore env variables */
		777	static int
		778	enable_secure (void)
		779	{
		780	#ifdef _WIN32
		781	return 0;
		782	#else
		783	return getuid () != geteuid ()
		784	\|\| getgid () != getegid ();
		785	#endif
		786	}
		787
		788	unsigned int
		789	ev_supported_backends (void)
		790	{
		791	unsigned int flags = 0;
		792
		793	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		794	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		795	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		796	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		797	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		798
		799	return flags;
		800	}
		801
		802	unsigned int
		803	ev_recommended_backends (void)
		804	{
		805	unsigned int flags = ev_supported_backends ();
		806
		807	#ifndef __NetBSD__
		808	/* kqueue is borked on everything but netbsd apparently */
		809	/* it usually doesn't work correctly on anything but sockets and pipes */
		810	flags &= ~EVBACKEND_KQUEUE;
		811	#endif
		812	#ifdef __APPLE__
		813	// flags &= ~EVBACKEND_KQUEUE; for documentation
		814	flags &= ~EVBACKEND_POLL;
		815	#endif
		816
		817	return flags;
		818	}
		819
		820	unsigned int
		821	ev_backend (EV_P)
		822	{
		823	return backend;
		824	}
		825
		826	static void
		827	loop_init (EV_P_ unsigned int flags)
		828	{
		829	if (!backend)
		830	{
		831	#if EV_USE_MONOTONIC
		832	{
		833	struct timespec ts;
		834	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		835	have_monotonic = 1;
		836	}
		837	#endif
		838
		839	ev_rt_now = ev_time ();
		840	mn_now = get_clock ();
		841	now_floor = mn_now;
		842	rtmn_diff = ev_rt_now - mn_now;
		843
		844	if (!(flags & EVFLAG_NOENV)
		845	&& !enable_secure ()
		846	&& getenv ("LIBEV_FLAGS"))
		847	flags = atoi (getenv ("LIBEV_FLAGS"));
		848
		849	if (!(flags & 0x0000ffffUL))
		850	flags \|= ev_recommended_backends ();
		851
		852	backend = 0;
		853	#if EV_USE_PORT
		854	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		855	#endif
		856	#if EV_USE_KQUEUE
		857	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		858	#endif
		859	#if EV_USE_EPOLL
		860	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		861	#endif
		862	#if EV_USE_POLL
		863	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		864	#endif
		865	#if EV_USE_SELECT
		866	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		867	#endif
		868
		869	ev_init (&sigev, sigcb);
		870	ev_set_priority (&sigev, EV_MAXPRI);
		871	}
		872	}
		873
		874	static void
		875	loop_destroy (EV_P)
393	{	876	{
394	int i;	877	int i;
395		878
396	for (i = 0; i < pendingcnt; ++i)	879	#if EV_USE_PORT
		880	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		881	#endif
		882	#if EV_USE_KQUEUE
		883	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		884	#endif
		885	#if EV_USE_EPOLL
		886	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		887	#endif
		888	#if EV_USE_POLL
		889	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		890	#endif
		891	#if EV_USE_SELECT
		892	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		893	#endif
		894
		895	for (i = NUMPRI; i--; )
		896	array_free (pending, [i]);
		897
		898	/* have to use the microsoft-never-gets-it-right macro */
		899	array_free (fdchange, EMPTY0);
		900	array_free (timer, EMPTY0);
		901	#if EV_PERIODICS
		902	array_free (periodic, EMPTY0);
		903	#endif
		904	array_free (idle, EMPTY0);
		905	array_free (prepare, EMPTY0);
		906	array_free (check, EMPTY0);
		907
		908	backend = 0;
		909	}
		910
		911	static void
		912	loop_fork (EV_P)
		913	{
		914	#if EV_USE_PORT
		915	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		916	#endif
		917	#if EV_USE_KQUEUE
		918	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		919	#endif
		920	#if EV_USE_EPOLL
		921	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		922	#endif
		923
		924	if (ev_is_active (&sigev))
		925	{
		926	/* default loop */
		927
		928	ev_ref (EV_A);
		929	ev_io_stop (EV_A_ &sigev);
		930	close (sigpipe [0]);
		931	close (sigpipe [1]);
		932
		933	while (pipe (sigpipe))
		934	syserr ("(libev) error creating pipe");
		935
		936	siginit (EV_A);
397	{	937	}
398	ANPENDING *p = pendings + i;
399		938
400	if (p->w)	939	postfork = 0;
		940	}
		941
		942	#if EV_MULTIPLICITY
		943	struct ev_loop *
		944	ev_loop_new (unsigned int flags)
		945	{
		946	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		947
		948	memset (loop, 0, sizeof (struct ev_loop));
		949
		950	loop_init (EV_A_ flags);
		951
		952	if (ev_backend (EV_A))
		953	return loop;
		954
		955	return 0;
		956	}
		957
		958	void
		959	ev_loop_destroy (EV_P)
		960	{
		961	loop_destroy (EV_A);
		962	ev_free (loop);
		963	}
		964
		965	void
		966	ev_loop_fork (EV_P)
		967	{
		968	postfork = 1;
		969	}
		970
		971	#endif
		972
		973	#if EV_MULTIPLICITY
		974	struct ev_loop *
		975	ev_default_loop_init (unsigned int flags)
		976	#else
		977	int
		978	ev_default_loop (unsigned int flags)
		979	#endif
		980	{
		981	if (sigpipe [0] == sigpipe [1])
		982	if (pipe (sigpipe))
		983	return 0;
		984
		985	if (!ev_default_loop_ptr)
		986	{
		987	#if EV_MULTIPLICITY
		988	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		989	#else
		990	ev_default_loop_ptr = 1;
		991	#endif
		992
		993	loop_init (EV_A_ flags);
		994
		995	if (ev_backend (EV_A))
401	{	996	{
402	p->w->pending = 0;	997	siginit (EV_A);
403	p->w->cb (p->w, p->events);	998
		999	#ifndef _WIN32
		1000	ev_signal_init (&childev, childcb, SIGCHLD);
		1001	ev_set_priority (&childev, EV_MAXPRI);
		1002	ev_signal_start (EV_A_ &childev);
		1003	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1004	#endif
404	}	1005	}
		1006	else
		1007	ev_default_loop_ptr = 0;
		1008	}
		1009
		1010	return ev_default_loop_ptr;
		1011	}
		1012
		1013	void
		1014	ev_default_destroy (void)
		1015	{
		1016	#if EV_MULTIPLICITY
		1017	struct ev_loop *loop = ev_default_loop_ptr;
		1018	#endif
		1019
		1020	#ifndef _WIN32
		1021	ev_ref (EV_A); /* child watcher */
		1022	ev_signal_stop (EV_A_ &childev);
		1023	#endif
		1024
		1025	ev_ref (EV_A); /* signal watcher */
		1026	ev_io_stop (EV_A_ &sigev);
		1027
		1028	close (sigpipe [0]); sigpipe [0] = 0;
		1029	close (sigpipe [1]); sigpipe [1] = 0;
		1030
		1031	loop_destroy (EV_A);
		1032	}
		1033
		1034	void
		1035	ev_default_fork (void)
		1036	{
		1037	#if EV_MULTIPLICITY
		1038	struct ev_loop *loop = ev_default_loop_ptr;
		1039	#endif
		1040
		1041	if (backend)
		1042	postfork = 1;
		1043	}
		1044
		1045	/*****************************************************************************/
		1046
		1047	static int
		1048	any_pending (EV_P)
		1049	{
		1050	int pri;
		1051
		1052	for (pri = NUMPRI; pri--; )
		1053	if (pendingcnt [pri])
		1054	return 1;
		1055
		1056	return 0;
		1057	}
		1058
		1059	inline void
		1060	call_pending (EV_P)
		1061	{
		1062	int pri;
		1063
		1064	for (pri = NUMPRI; pri--; )
		1065	while (pendingcnt [pri])
		1066	{
		1067	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1068
		1069	if (expect_true (p->w))
		1070	{
		1071	p->w->pending = 0;
		1072	EV_CB_INVOKE (p->w, p->events);
		1073	}
405	}	1074	}
406
407	pendingcnt = 0;
408	}	1075	}
409		1076
410	static void	1077	inline void
411	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1078	timers_reify (EV_P)
412	{	1079	{
413	while (timercnt && timers [0]->at <= now)	1080	while (timercnt && ((WT)timers [0])->at <= mn_now)
414	{	1081	{
415	struct ev_timer *w = timers [0];	1082	struct ev_timer *w = timers [0];
		1083
		1084	assert (("inactive timer on timer heap detected", ev_is_active (w)));
416		1085
417	/* first reschedule or stop timer */	1086	/* first reschedule or stop timer */
418	if (w->repeat)	1087	if (w->repeat)
419	{	1088	{
420	if (w->is_abs)	1089	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
421	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1090
422	else
423	w->at = now + w->repeat;	1091	((WT)w)->at += w->repeat;
		1092	if (((WT)w)->at < mn_now)
		1093	((WT)w)->at = mn_now;
424		1094
425	assert (w->at > now);
426
427	downheap (timers, timercnt, 0);	1095	downheap ((WT *)timers, timercnt, 0);
428	}	1096	}
429	else	1097	else
		1098	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1099
		1100	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1101	}
		1102	}
		1103
		1104	#if EV_PERIODICS
		1105	inline void
		1106	periodics_reify (EV_P)
		1107	{
		1108	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1109	{
		1110	struct ev_periodic *w = periodics [0];
		1111
		1112	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1113
		1114	/* first reschedule or stop timer */
		1115	if (w->reschedule_cb)
430	{	1116	{
431	evtimer_stop (w); /* nonrepeating: stop timer */	1117	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
432	--timercnt; /* maybe pass by reference instead? */	1118	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1119	downheap ((WT *)periodics, periodiccnt, 0);
433	}	1120	}
		1121	else if (w->interval)
		1122	{
		1123	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1124	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1125	downheap ((WT *)periodics, periodiccnt, 0);
		1126	}
		1127	else
		1128	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
434		1129
435	event ((W)w, EV_TIMEOUT);	1130	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
436	}	1131	}
437	}	1132	}
438		1133
439	static void	1134	static void
440	time_update ()	1135	periodics_reschedule (EV_P)
441	{	1136	{
442	int i;	1137	int i;
		1138
		1139	/* adjust periodics after time jump */
		1140	for (i = 0; i < periodiccnt; ++i)
		1141	{
		1142	struct ev_periodic *w = periodics [i];
		1143
		1144	if (w->reschedule_cb)
		1145	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1146	else if (w->interval)
		1147	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1148	}
		1149
		1150	/* now rebuild the heap */
		1151	for (i = periodiccnt >> 1; i--; )
		1152	downheap ((WT *)periodics, periodiccnt, i);
		1153	}
		1154	#endif
		1155
		1156	inline int
		1157	time_update_monotonic (EV_P)
		1158	{
		1159	mn_now = get_clock ();
		1160
		1161	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1162	{
		1163	ev_rt_now = rtmn_diff + mn_now;
		1164	return 0;
		1165	}
		1166	else
		1167	{
		1168	now_floor = mn_now;
443	ev_now = ev_time ();	1169	ev_rt_now = ev_time ();
444		1170	return 1;
445	if (have_monotonic)
446	{	1171	}
447	ev_tstamp odiff = diff;	1172	}
448		1173
449	/* detecting time jumps is much more difficult */	1174	inline void
450	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1175	time_update (EV_P)
		1176	{
		1177	int i;
		1178
		1179	#if EV_USE_MONOTONIC
		1180	if (expect_true (have_monotonic))
		1181	{
		1182	if (time_update_monotonic (EV_A))
451	{	1183	{
452	now = get_clock ();	1184	ev_tstamp odiff = rtmn_diff;
		1185
		1186	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1187	{
453	diff = ev_now - now;	1188	rtmn_diff = ev_rt_now - mn_now;
454		1189
455	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1190	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
456	return; /* all is well */	1191	return; /* all is well */
457		1192
458	ev_now = ev_time ();	1193	ev_rt_now = ev_time ();
		1194	mn_now = get_clock ();
		1195	now_floor = mn_now;
		1196	}
		1197
		1198	# if EV_PERIODICS
		1199	periodics_reschedule (EV_A);
		1200	# endif
		1201	/* no timer adjustment, as the monotonic clock doesn't jump */
		1202	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
459	}	1203	}
		1204	}
		1205	else
		1206	#endif
		1207	{
		1208	ev_rt_now = ev_time ();
460		1209
461	/* time jump detected, reschedule atimers */	1210	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
462	for (i = 0; i < atimercnt; ++i)
463	{	1211	{
464	struct ev_timer *w = atimers [i];	1212	#if EV_PERIODICS
465	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1213	periodics_reschedule (EV_A);
		1214	#endif
		1215
		1216	/* adjust timers. this is easy, as the offset is the same for all */
		1217	for (i = 0; i < timercnt; ++i)
		1218	((WT)timers [i])->at += ev_rt_now - mn_now;
466	}	1219	}
467	}
468	else
469	{
470	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
471	/* time jump detected, adjust rtimers */
472	for (i = 0; i < rtimercnt; ++i)
473	rtimers [i]->at += ev_now - now;
474		1220
475	now = ev_now;	1221	mn_now = ev_rt_now;
476	}	1222	}
477	}	1223	}
478		1224
479	int ev_loop_done;	1225	void
		1226	ev_ref (EV_P)
		1227	{
		1228	++activecnt;
		1229	}
480		1230
		1231	void
		1232	ev_unref (EV_P)
		1233	{
		1234	--activecnt;
		1235	}
		1236
		1237	static int loop_done;
		1238
		1239	void
481	void ev_loop (int flags)	1240	ev_loop (EV_P_ int flags)
482	{	1241	{
483	double block;	1242	double block;
484	ev_loop_done = flags & EVLOOP_ONESHOT;	1243	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
485		1244
486	if (checkcnt)	1245	while (activecnt)
487	{	1246	{
488	queue_events ((W *)checks, checkcnt, EV_CHECK);	1247	/* queue check watchers (and execute them) */
		1248	if (expect_false (preparecnt))
		1249	{
		1250	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
489	call_pending ();	1251	call_pending (EV_A);
490	}	1252	}
491		1253
492	do	1254	/* we might have forked, so reify kernel state if necessary */
493	{	1255	if (expect_false (postfork))
		1256	loop_fork (EV_A);
		1257
494	/* update fd-related kernel structures */	1258	/* update fd-related kernel structures */
495	fd_reify ();	1259	fd_reify (EV_A);
496		1260
497	/* calculate blocking time */	1261	/* calculate blocking time */
		1262
		1263	/* we only need this for !monotonic clock or timers, but as we basically
		1264	always have timers, we just calculate it always */
		1265	#if EV_USE_MONOTONIC
		1266	if (expect_true (have_monotonic))
		1267	time_update_monotonic (EV_A);
		1268	else
		1269	#endif
		1270	{
		1271	ev_rt_now = ev_time ();
		1272	mn_now = ev_rt_now;
		1273	}
		1274
498	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1275	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
499	block = 0.;	1276	block = 0.;
500	else	1277	else
501	{	1278	{
502	block = MAX_BLOCKTIME;	1279	block = MAX_BLOCKTIME;
503		1280
504	if (rtimercnt)	1281	if (timercnt)
505	{	1282	{
506	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1283	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
507	if (block > to) block = to;	1284	if (block > to) block = to;
508	}	1285	}
509		1286
		1287	#if EV_PERIODICS
510	if (atimercnt)	1288	if (periodiccnt)
511	{	1289	{
512	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1290	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
513	if (block > to) block = to;	1291	if (block > to) block = to;
514	}	1292	}
		1293	#endif
515		1294
516	if (block < 0.) block = 0.;	1295	if (expect_false (block < 0.)) block = 0.;
517	}	1296	}
518		1297
519	method_poll (block);	1298	backend_poll (EV_A_ block);
520		1299
521	/* update ev_now, do magic */	1300	/* update ev_rt_now, do magic */
522	time_update ();	1301	time_update (EV_A);
523		1302
524	/* queue pending timers and reschedule them */	1303	/* queue pending timers and reschedule them */
525	/* absolute timers first */	1304	timers_reify (EV_A); /* relative timers called last */
526	timers_reify (atimers, atimercnt, ev_now);	1305	#if EV_PERIODICS
527	/* relative timers second */	1306	periodics_reify (EV_A); /* absolute timers called first */
528	timers_reify (rtimers, rtimercnt, now);	1307	#endif
529		1308
530	/* queue idle watchers unless io or timers are pending */	1309	/* queue idle watchers unless io or timers are pending */
531	if (!pendingcnt)	1310	if (idlecnt && !any_pending (EV_A))
532	queue_events ((W *)idles, idlecnt, EV_IDLE);	1311	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
533		1312
534	/* queue check and possibly idle watchers */	1313	/* queue check watchers, to be executed first */
		1314	if (expect_false (checkcnt))
535	queue_events ((W *)checks, checkcnt, EV_CHECK);	1315	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
536		1316
537	call_pending ();	1317	call_pending (EV_A);
		1318
		1319	if (expect_false (loop_done))
		1320	break;
538	}	1321	}
539	while (!ev_loop_done);	1322
		1323	if (loop_done != 2)
		1324	loop_done = 0;
		1325	}
		1326
		1327	void
		1328	ev_unloop (EV_P_ int how)
		1329	{
		1330	loop_done = how;
540	}	1331	}
541		1332
542	/*****************************************************************************/	1333	/*****************************************************************************/
543		1334
544	static void	1335	inline void
545	wlist_add (WL *head, WL elem)	1336	wlist_add (WL *head, WL elem)
546	{	1337	{
547	elem->next = *head;	1338	elem->next = *head;
548	*head = elem;	1339	*head = elem;
549	}	1340	}
550		1341
551	static void	1342	inline void
552	wlist_del (WL *head, WL elem)	1343	wlist_del (WL *head, WL elem)
553	{	1344	{
554	while (*head)	1345	while (*head)
555	{	1346	{
556	if (*head == elem)	1347	if (*head == elem)
561		1352
562	head = &(*head)->next;	1353	head = &(*head)->next;
563	}	1354	}
564	}	1355	}
565		1356
566	static void	1357	inline void
		1358	ev_clear_pending (EV_P_ W w)
		1359	{
		1360	if (w->pending)
		1361	{
		1362	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1363	w->pending = 0;
		1364	}
		1365	}
		1366
		1367	inline void
567	ev_start (W w, int active)	1368	ev_start (EV_P_ W w, int active)
568	{	1369	{
569	w->pending = 0;	1370	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1371	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1372
570	w->active = active;	1373	w->active = active;
		1374	ev_ref (EV_A);
571	}	1375	}
572		1376
573	static void	1377	inline void
574	ev_stop (W w)	1378	ev_stop (EV_P_ W w)
575	{	1379	{
576	if (w->pending)	1380	ev_unref (EV_A);
577	pendings [w->pending - 1].w = 0;
578
579	w->active = 0;	1381	w->active = 0;
580	}	1382	}
581		1383
582	/*****************************************************************************/	1384	/*****************************************************************************/
583		1385
584	void	1386	void
585	evio_start (struct ev_io *w)	1387	ev_io_start (EV_P_ struct ev_io *w)
		1388	{
		1389	int fd = w->fd;
		1390
		1391	if (expect_false (ev_is_active (w)))
		1392	return;
		1393
		1394	assert (("ev_io_start called with negative fd", fd >= 0));
		1395
		1396	ev_start (EV_A_ (W)w, 1);
		1397	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1398	wlist_add ((WL *)&anfds[fd].head, (WL)w);
		1399
		1400	fd_change (EV_A_ fd);
		1401	}
		1402
		1403	void
		1404	ev_io_stop (EV_P_ struct ev_io *w)
		1405	{
		1406	ev_clear_pending (EV_A_ (W)w);
		1407	if (expect_false (!ev_is_active (w)))
		1408	return;
		1409
		1410	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1411
		1412	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
		1413	ev_stop (EV_A_ (W)w);
		1414
		1415	fd_change (EV_A_ w->fd);
		1416	}
		1417
		1418	void
		1419	ev_timer_start (EV_P_ struct ev_timer *w)
		1420	{
		1421	if (expect_false (ev_is_active (w)))
		1422	return;
		1423
		1424	((WT)w)->at += mn_now;
		1425
		1426	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1427
		1428	ev_start (EV_A_ (W)w, ++timercnt);
		1429	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
		1430	timers [timercnt - 1] = w;
		1431	upheap ((WT *)timers, timercnt - 1);
		1432
		1433	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1434	}
		1435
		1436	void
		1437	ev_timer_stop (EV_P_ struct ev_timer *w)
		1438	{
		1439	ev_clear_pending (EV_A_ (W)w);
		1440	if (expect_false (!ev_is_active (w)))
		1441	return;
		1442
		1443	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1444
		1445	if (expect_true (((W)w)->active < timercnt--))
		1446	{
		1447	timers [((W)w)->active - 1] = timers [timercnt];
		1448	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1449	}
		1450
		1451	((WT)w)->at -= mn_now;
		1452
		1453	ev_stop (EV_A_ (W)w);
		1454	}
		1455
		1456	void
		1457	ev_timer_again (EV_P_ struct ev_timer *w)
586	{	1458	{
587	if (ev_is_active (w))	1459	if (ev_is_active (w))
		1460	{
		1461	if (w->repeat)
		1462	{
		1463	((WT)w)->at = mn_now + w->repeat;
		1464	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1465	}
		1466	else
		1467	ev_timer_stop (EV_A_ w);
		1468	}
		1469	else if (w->repeat)
		1470	{
		1471	w->at = w->repeat;
		1472	ev_timer_start (EV_A_ w);
		1473	}
		1474	}
		1475
		1476	#if EV_PERIODICS
		1477	void
		1478	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1479	{
		1480	if (expect_false (ev_is_active (w)))
588	return;	1481	return;
589		1482
590	int fd = w->fd;	1483	if (w->reschedule_cb)
		1484	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1485	else if (w->interval)
		1486	{
		1487	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1488	/* this formula differs from the one in periodic_reify because we do not always round up */
		1489	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1490	}
591		1491
592	ev_start ((W)w, 1);	1492	ev_start (EV_A_ (W)w, ++periodiccnt);
593	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1493	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
594	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1494	periodics [periodiccnt - 1] = w;
		1495	upheap ((WT *)periodics, periodiccnt - 1);
595		1496
596	++fdchangecnt;	1497	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = fd;
599	}	1498	}
600		1499
601	void	1500	void
602	evio_stop (struct ev_io *w)	1501	ev_periodic_stop (EV_P_ struct ev_periodic *w)
603	{	1502	{
		1503	ev_clear_pending (EV_A_ (W)w);
604	if (!ev_is_active (w))	1504	if (expect_false (!ev_is_active (w)))
605	return;	1505	return;
606		1506
607	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1507	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1508
		1509	if (expect_true (((W)w)->active < periodiccnt--))
		1510	{
		1511	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1512	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
		1513	}
		1514
608	ev_stop ((W)w);	1515	ev_stop (EV_A_ (W)w);
609
610	++fdchangecnt;
611	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
612	fdchanges [fdchangecnt - 1] = w->fd;
613	}	1516	}
614		1517
615	void	1518	void
		1519	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1520	{
		1521	/* TODO: use adjustheap and recalculation */
		1522	ev_periodic_stop (EV_A_ w);
		1523	ev_periodic_start (EV_A_ w);
		1524	}
		1525	#endif
		1526
		1527	void
616	evtimer_start (struct ev_timer *w)	1528	ev_idle_start (EV_P_ struct ev_idle *w)
617	{	1529	{
618	if (ev_is_active (w))	1530	if (expect_false (ev_is_active (w)))
619	return;	1531	return;
620		1532
621	if (w->is_abs)
622	{
623	/* this formula differs from the one in timer_reify becuse we do not round up */
624	if (w->repeat)
625	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
626
627	ev_start ((W)w, ++atimercnt);	1533	ev_start (EV_A_ (W)w, ++idlecnt);
628	array_needsize (atimers, atimermax, atimercnt, );	1534	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
629	atimers [atimercnt - 1] = w;	1535	idles [idlecnt - 1] = w;
630	upheap (atimers, atimercnt - 1);
631	}
632	else
633	{
634	w->at += now;
635
636	ev_start ((W)w, ++rtimercnt);
637	array_needsize (rtimers, rtimermax, rtimercnt, );
638	rtimers [rtimercnt - 1] = w;
639	upheap (rtimers, rtimercnt - 1);
640	}
641
642	}	1536	}
643		1537
644	void	1538	void
645	evtimer_stop (struct ev_timer *w)	1539	ev_idle_stop (EV_P_ struct ev_idle *w)
646	{	1540	{
		1541	ev_clear_pending (EV_A_ (W)w);
647	if (!ev_is_active (w))	1542	if (expect_false (!ev_is_active (w)))
648	return;	1543	return;
649		1544
650	if (w->is_abs)	1545	idles [((W)w)->active - 1] = idles [--idlecnt];
651	{
652	if (w->active < atimercnt--)
653	{
654	atimers [w->active - 1] = atimers [atimercnt];
655	downheap (atimers, atimercnt, w->active - 1);
656	}
657	}
658	else
659	{
660	if (w->active < rtimercnt--)
661	{
662	rtimers [w->active - 1] = rtimers [rtimercnt];
663	downheap (rtimers, rtimercnt, w->active - 1);
664	}
665	}
666
667	ev_stop ((W)w);	1546	ev_stop (EV_A_ (W)w);
668	}	1547	}
669		1548
670	void	1549	void
671	evsignal_start (struct ev_signal *w)	1550	ev_prepare_start (EV_P_ struct ev_prepare *w)
672	{	1551	{
673	if (ev_is_active (w))	1552	if (expect_false (ev_is_active (w)))
674	return;	1553	return;
675		1554
		1555	ev_start (EV_A_ (W)w, ++preparecnt);
		1556	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1557	prepares [preparecnt - 1] = w;
		1558	}
		1559
		1560	void
		1561	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1562	{
		1563	ev_clear_pending (EV_A_ (W)w);
		1564	if (expect_false (!ev_is_active (w)))
		1565	return;
		1566
		1567	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1568	ev_stop (EV_A_ (W)w);
		1569	}
		1570
		1571	void
		1572	ev_check_start (EV_P_ struct ev_check *w)
		1573	{
		1574	if (expect_false (ev_is_active (w)))
		1575	return;
		1576
		1577	ev_start (EV_A_ (W)w, ++checkcnt);
		1578	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1579	checks [checkcnt - 1] = w;
		1580	}
		1581
		1582	void
		1583	ev_check_stop (EV_P_ struct ev_check *w)
		1584	{
		1585	ev_clear_pending (EV_A_ (W)w);
		1586	if (expect_false (!ev_is_active (w)))
		1587	return;
		1588
		1589	checks [((W)w)->active - 1] = checks [--checkcnt];
		1590	ev_stop (EV_A_ (W)w);
		1591	}
		1592
		1593	#ifndef SA_RESTART
		1594	# define SA_RESTART 0
		1595	#endif
		1596
		1597	void
		1598	ev_signal_start (EV_P_ struct ev_signal *w)
		1599	{
		1600	#if EV_MULTIPLICITY
		1601	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1602	#endif
		1603	if (expect_false (ev_is_active (w)))
		1604	return;
		1605
		1606	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1607
676	ev_start ((W)w, 1);	1608	ev_start (EV_A_ (W)w, 1);
677	array_needsize (signals, signalmax, w->signum, signals_init);	1609	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
678	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1610	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
679		1611
680	if (!w->next)	1612	if (!((WL)w)->next)
681	{	1613	{
		1614	#if _WIN32
		1615	signal (w->signum, sighandler);
		1616	#else
682	struct sigaction sa;	1617	struct sigaction sa;
683	sa.sa_handler = sighandler;	1618	sa.sa_handler = sighandler;
684	sigfillset (&sa.sa_mask);	1619	sigfillset (&sa.sa_mask);
685	sa.sa_flags = 0;	1620	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
686	sigaction (w->signum, &sa, 0);	1621	sigaction (w->signum, &sa, 0);
		1622	#endif
687	}	1623	}
688	}	1624	}
689		1625
690	void	1626	void
691	evsignal_stop (struct ev_signal *w)	1627	ev_signal_stop (EV_P_ struct ev_signal *w)
692	{	1628	{
		1629	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1630	if (expect_false (!ev_is_active (w)))
694	return;	1631	return;
695		1632
696	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1633	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
697	ev_stop ((W)w);	1634	ev_stop (EV_A_ (W)w);
698		1635
699	if (!signals [w->signum - 1].head)	1636	if (!signals [w->signum - 1].head)
700	signal (w->signum, SIG_DFL);	1637	signal (w->signum, SIG_DFL);
701	}	1638	}
702		1639
703	void evidle_start (struct ev_idle *w)	1640	void
		1641	ev_child_start (EV_P_ struct ev_child *w)
704	{	1642	{
		1643	#if EV_MULTIPLICITY
		1644	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1645	#endif
705	if (ev_is_active (w))	1646	if (expect_false (ev_is_active (w)))
706	return;	1647	return;
707		1648
708	ev_start ((W)w, ++idlecnt);	1649	ev_start (EV_A_ (W)w, 1);
709	array_needsize (idles, idlemax, idlecnt, );	1650	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
710	idles [idlecnt - 1] = w;
711	}	1651	}
712		1652
713	void evidle_stop (struct ev_idle *w)	1653	void
		1654	ev_child_stop (EV_P_ struct ev_child *w)
714	{	1655	{
715	idles [w->active - 1] = idles [--idlecnt];	1656	ev_clear_pending (EV_A_ (W)w);
716	ev_stop ((W)w);	1657	if (expect_false (!ev_is_active (w)))
717	}
718
719	void evcheck_start (struct ev_check *w)
720	{
721	if (ev_is_active (w))
722	return;	1658	return;
723		1659
724	ev_start ((W)w, ++checkcnt);	1660	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
725	array_needsize (checks, checkmax, checkcnt, );
726	checks [checkcnt - 1] = w;
727	}
728
729	void evcheck_stop (struct ev_check *w)
730	{
731	checks [w->active - 1] = checks [--checkcnt];
732	ev_stop ((W)w);	1661	ev_stop (EV_A_ (W)w);
733	}	1662	}
734		1663
735	/*****************************************************************************/	1664	/*****************************************************************************/
736		1665
737	#if 0	1666	struct ev_once
738
739	static void
740	sin_cb (struct ev_io *w, int revents)
741	{	1667	{
742	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
743	}
744
745	static void
746	ocb (struct ev_timer *w, int revents)
747	{
748	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
749	evtimer_stop (w);
750	evtimer_start (w);
751	}
752
753	static void
754	scb (struct ev_signal *w, int revents)
755	{
756	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
757	}
758
759	static void
760	gcb (struct ev_signal *w, int revents)
761	{
762	fprintf (stderr, "generic %x\n", revents);
763	}
764
765	int main (void)
766	{
767	struct ev_io sin;	1668	struct ev_io io;
768
769	ev_init (0);
770
771	evw_init (&sin, sin_cb, 55);
772	evio_set (&sin, 0, EV_READ);
773	evio_start (&sin);
774
775	struct ev_timer t[10000];
776
777	#if 0
778	int i;
779	for (i = 0; i < 10000; ++i)
780	{
781	struct ev_timer *w = t + i;
782	evw_init (w, ocb, i);
783	evtimer_set_abs (w, drand48 (), 0.99775533);
784	evtimer_start (w);
785	if (drand48 () < 0.5)
786	evtimer_stop (w);
787	}
788	#endif
789
790	struct ev_timer t1;	1669	struct ev_timer to;
791	evw_init (&t1, ocb, 0);	1670	void (cb)(int revents, void arg);
792	evtimer_set_abs (&t1, 5, 10);	1671	void *arg;
793	evtimer_start (&t1);	1672	};
794		1673
795	struct ev_signal sig;	1674	static void
796	evw_init (&sig, scb, 65535);	1675	once_cb (EV_P_ struct ev_once *once, int revents)
797	evsignal_set (&sig, SIGQUIT);	1676	{
798	evsignal_start (&sig);	1677	void (cb)(int revents, void arg) = once->cb;
		1678	void *arg = once->arg;
799		1679
800	struct ev_check cw;	1680	ev_io_stop (EV_A_ &once->io);
801	evw_init (&cw, gcb, 0);	1681	ev_timer_stop (EV_A_ &once->to);
802	evcheck_start (&cw);	1682	ev_free (once);
803		1683
804	struct ev_idle iw;	1684	cb (revents, arg);
805	evw_init (&iw, gcb, 0);	1685	}
806	evidle_start (&iw);
807		1686
808	ev_loop (0);	1687	static void
		1688	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1689	{
		1690	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1691	}
809		1692
		1693	static void
		1694	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1695	{
		1696	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1697	}
		1698
		1699	void
		1700	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1701	{
		1702	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
		1703
		1704	if (expect_false (!once))
		1705	{
		1706	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
810	return 0;	1707	return;
811	}	1708	}
812		1709
813	#endif	1710	once->cb = cb;
		1711	once->arg = arg;
814		1712
		1713	ev_init (&once->io, once_cb_io);
		1714	if (fd >= 0)
		1715	{
		1716	ev_io_set (&once->io, fd, events);
		1717	ev_io_start (EV_A_ &once->io);
		1718	}
815		1719
		1720	ev_init (&once->to, once_cb_to);
		1721	if (timeout >= 0.)
		1722	{
		1723	ev_timer_set (&once->to, timeout, 0.);
		1724	ev_timer_start (EV_A_ &once->to);
		1725	}
		1726	}
816		1727
		1728	#ifdef __cplusplus
		1729	}
		1730	#endif
817		1731

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Comparing libev/ev.c (file contents): Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs. Revision 1.133 by root, Fri Nov 23 11:32:22 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.133 by root, Fri Nov 23 11:32:22 2007 UTC