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Comparing libev/ev.c (file contents):
Revision 1.29 by root, Thu Nov 1 08:10:03 2007 UTC vs.
Revision 1.112 by root, Mon Nov 12 07:20:24 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29	#if EV_USE_CONFIG_H	31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
30	# include "config.h"	37	# include "config.h"
		38
		39	# if HAVE_CLOCK_GETTIME
		40	# ifndef EV_USE_MONOTONIC
		41	# define EV_USE_MONOTONIC 1
		42	# endif
		43	# ifndef EV_USE_REALTIME
		44	# define EV_USE_REALTIME 1
		45	# endif
		46	# endif
		47
		48	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)
		49	# define EV_USE_SELECT 1
		50	# endif
		51
		52	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)
		53	# define EV_USE_POLL 1
		54	# endif
		55
		56	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)
		57	# define EV_USE_EPOLL 1
		58	# endif
		59
		60	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)
		61	# define EV_USE_KQUEUE 1
		62	# endif
		63
31	#endif	64	#endif
32		65
33	#include <math.h>	66	#include <math.h>
34	#include <stdlib.h>	67	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	68	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	69	#include <stddef.h>
39		70
40	#include <stdio.h>	71	#include <stdio.h>
41		72
42	#include <assert.h>	73	#include <assert.h>
43	#include <errno.h>	74	#include <errno.h>
44	#include <sys/types.h>	75	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	76	#include <time.h>
48		77
		78	#include <signal.h>
		79
		80	#ifndef _WIN32
		81	# include <unistd.h>
		82	# include <sys/time.h>
		83	# include <sys/wait.h>
		84	#else
		85	# define WIN32_LEAN_AND_MEAN
		86	# include <windows.h>
		87	# ifndef EV_SELECT_IS_WINSOCKET
		88	# define EV_SELECT_IS_WINSOCKET 1
		89	# endif
		90	#endif
		91
		92	/**/
		93
49	#ifndef EV_USE_MONOTONIC	94	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	95	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	96	#endif
54		97
55	#ifndef EV_USE_SELECT	98	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	99	# define EV_USE_SELECT 1
		100	# define EV_SELECT_USE_FD_SET 1
		101	#endif
		102
		103	#ifndef EV_USE_POLL
		104	# ifdef _WIN32
		105	# define EV_USE_POLL 0
		106	# else
		107	# define EV_USE_POLL 1
		108	# endif
57	#endif	109	#endif
58		110
59	#ifndef EV_USE_EPOLL	111	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	112	# define EV_USE_EPOLL 0
61	#endif	113	#endif
62		114
		115	#ifndef EV_USE_KQUEUE
		116	# define EV_USE_KQUEUE 0
		117	#endif
		118
63	#ifndef EV_USE_REALTIME	119	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	120	# define EV_USE_REALTIME 1
65	#endif	121	#endif
		122
		123	/**/
		124
		125	/* darwin simply cannot be helped */
		126	#ifdef __APPLE__
		127	# undef EV_USE_POLL
		128	# undef EV_USE_KQUEUE
		129	#endif
		130
		131	#ifndef CLOCK_MONOTONIC
		132	# undef EV_USE_MONOTONIC
		133	# define EV_USE_MONOTONIC 0
		134	#endif
		135
		136	#ifndef CLOCK_REALTIME
		137	# undef EV_USE_REALTIME
		138	# define EV_USE_REALTIME 0
		139	#endif
		140
		141	#if EV_SELECT_IS_WINSOCKET
		142	# include <winsock.h>
		143	#endif
		144
		145	/**/
66		146
67	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	147	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
68	#define MAX_BLOCKTIME 59.731	148	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	149	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		150	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
70		151
		152	#ifdef EV_H
		153	# include EV_H
		154	#else
71	#include "ev.h"	155	# include "ev.h"
		156	#endif
		157
		158	#if __GNUC__ >= 3
		159	# define expect(expr,value) __builtin_expect ((expr),(value))
		160	# define inline inline
		161	#else
		162	# define expect(expr,value) (expr)
		163	# define inline static
		164	#endif
		165
		166	#define expect_false(expr) expect ((expr) != 0, 0)
		167	#define expect_true(expr) expect ((expr) != 0, 1)
		168
		169	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		170	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		171
		172	#define EMPTY /* required for microsofts broken pseudo-c compiler */
72		173
73	typedef struct ev_watcher *W;	174	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	175	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	176	typedef struct ev_watcher_time *WT;
76		177
77	static ev_tstamp now, diff; /* monotonic clock */	178	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		179
		180	#ifdef _WIN32
		181	# include "ev_win32.c"
		182	#endif
		183
		184	/*****************************************************************************/
		185
		186	static void (*syserr_cb)(const char *msg);
		187
		188	void ev_set_syserr_cb (void (*cb)(const char *msg))
		189	{
		190	syserr_cb = cb;
		191	}
		192
		193	static void
		194	syserr (const char *msg)
		195	{
		196	if (!msg)
		197	msg = "(libev) system error";
		198
		199	if (syserr_cb)
		200	syserr_cb (msg);
		201	else
		202	{
		203	perror (msg);
		204	abort ();
		205	}
		206	}
		207
		208	static void *(*alloc)(void *ptr, long size);
		209
		210	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		211	{
		212	alloc = cb;
		213	}
		214
		215	static void *
		216	ev_realloc (void *ptr, long size)
		217	{
		218	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		219
		220	if (!ptr && size)
		221	{
		222	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		223	abort ();
		224	}
		225
		226	return ptr;
		227	}
		228
		229	#define ev_malloc(size) ev_realloc (0, (size))
		230	#define ev_free(ptr) ev_realloc ((ptr), 0)
		231
		232	/*****************************************************************************/
		233
		234	typedef struct
		235	{
		236	WL head;
		237	unsigned char events;
		238	unsigned char reify;
		239	#if EV_SELECT_IS_WINSOCKET
		240	SOCKET handle;
		241	#endif
		242	} ANFD;
		243
		244	typedef struct
		245	{
		246	W w;
		247	int events;
		248	} ANPENDING;
		249
		250	#if EV_MULTIPLICITY
		251
		252	struct ev_loop
		253	{
		254	ev_tstamp ev_rt_now;
		255	#define ev_rt_now ((loop)->ev_rt_now)
		256	#define VAR(name,decl) decl;
		257	#include "ev_vars.h"
		258	#undef VAR
		259	};
		260	#include "ev_wrap.h"
		261
		262	struct ev_loop default_loop_struct;
		263	static struct ev_loop *default_loop;
		264
		265	#else
		266
78	ev_tstamp ev_now;	267	ev_tstamp ev_rt_now;
79	int ev_method;	268	#define VAR(name,decl) static decl;
		269	#include "ev_vars.h"
		270	#undef VAR
80		271
81	static int have_monotonic; /* runtime */	272	static int default_loop;
82		273
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	274	#endif
84	static void (*method_modify)(int fd, int oev, int nev);
85	static void (*method_poll)(ev_tstamp timeout);
86		275
87	/*****************************************************************************/	276	/*****************************************************************************/
88		277
89	ev_tstamp	278	ev_tstamp
90	ev_time (void)	279	ev_time (void)
…		…
98	gettimeofday (&tv, 0);	287	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	288	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	289	#endif
101	}	290	}
102		291
103	static ev_tstamp	292	inline ev_tstamp
104	get_clock (void)	293	get_clock (void)
105	{	294	{
106	#if EV_USE_MONOTONIC	295	#if EV_USE_MONOTONIC
107	if (have_monotonic)	296	if (expect_true (have_monotonic))
108	{	297	{
109	struct timespec ts;	298	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	299	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	300	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	301	}
113	#endif	302	#endif
114		303
115	return ev_time ();	304	return ev_time ();
116	}	305	}
117		306
		307	#if EV_MULTIPLICITY
		308	ev_tstamp
		309	ev_now (EV_P)
		310	{
		311	return ev_rt_now;
		312	}
		313	#endif
		314
118	#define array_nextsize(n) (((n) << 1) | 4 & ~3)	315	#define array_roundsize(type,n) (((n) | 4) & ~3)
119	#define array_prevsize(n) (((n) >> 1) | 4 & ~3)
120		316
121	#define array_needsize(base,cur,cnt,init) \	317	#define array_needsize(type,base,cur,cnt,init) \
122	if ((cnt) > cur) \	318	if (expect_false ((cnt) > cur)) \
123	{ \	319	{ \
124	int newcnt = cur; \	320	int newcnt = cur; \
125	do \	321	do \
126	{ \	322	{ \
127	newcnt = array_nextsize (newcnt); \	323	newcnt = array_roundsize (type, newcnt << 1); \
128	} \	324	} \
129	while ((cnt) > newcnt); \	325	while ((cnt) > newcnt); \
130	\	326	\
131	base = realloc (base, sizeof (*base) * (newcnt)); \	327	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
132	init (base + cur, newcnt - cur); \	328	init (base + cur, newcnt - cur); \
133	cur = newcnt; \	329	cur = newcnt; \
134	}	330	}
		331
		332	#define array_slim(type,stem) \
		333	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		334	{ \
		335	stem ## max = array_roundsize (stem ## cnt >> 1); \
		336	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		337	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		338	}
		339
		340	#define array_free(stem, idx) \
		341	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
135		342
136	/*****************************************************************************/	343	/*****************************************************************************/
137
138	typedef struct
139	{
140	struct ev_io *head;
141	int events;
142	} ANFD;
143
144	static ANFD *anfds;
145	static int anfdmax;
146		344
147	static void	345	static void
148	anfds_init (ANFD *base, int count)	346	anfds_init (ANFD *base, int count)
149	{	347	{
150	while (count--)	348	while (count--)
151	{	349	{
152	base->head = 0;	350	base->head = 0;
153	base->events = EV_NONE;	351	base->events = EV_NONE;
		352	base->reify = 0;
		353
154	++base;	354	++base;
155	}	355	}
156	}	356	}
157		357
158	typedef struct	358	void
		359	ev_feed_event (EV_P_ void *w, int revents)
159	{	360	{
160	W w;	361	W w_ = (W)w;
161	int events;
162	} ANPENDING;
163		362
164	static ANPENDING *pendings;	363	if (w_->pending)
165	static int pendingmax, pendingcnt;
166
167	static void
168	event (W w, int events)
169	{
170	if (w->active)
171	{	364	{
172	w->pending = ++pendingcnt;
173	array_needsize (pendings, pendingmax, pendingcnt, );
174	pendings [pendingcnt - 1].w = w;
175	pendings [pendingcnt - 1].events = events;	365	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		366	return;
176	}	367	}
177	}
178		368
		369	w_->pending = ++pendingcnt [ABSPRI (w_)];
		370	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
		371	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		372	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		373	}
		374
179	static void	375	static void
180	queue_events (W *events, int eventcnt, int type)	376	queue_events (EV_P_ W *events, int eventcnt, int type)
181	{	377	{
182	int i;	378	int i;
183		379
184	for (i = 0; i < eventcnt; ++i)	380	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);	381	ev_feed_event (EV_A_ events [i], type);
186	}	382	}
187		383
188	static void	384	inline void
189	fd_event (int fd, int events)	385	fd_event (EV_P_ int fd, int revents)
190	{	386	{
191	ANFD *anfd = anfds + fd;	387	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	388	struct ev_io *w;
193		389
194	for (w = anfd->head; w; w = w->next)	390	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
195	{	391	{
196	int ev = w->events & events;	392	int ev = w->events & revents;
197		393
198	if (ev)	394	if (ev)
199	event ((W)w, ev);	395	ev_feed_event (EV_A_ (W)w, ev);
200	}	396	}
		397	}
		398
		399	void
		400	ev_feed_fd_event (EV_P_ int fd, int revents)
		401	{
		402	fd_event (EV_A_ fd, revents);
201	}	403	}
202		404
203	/*****************************************************************************/	405	/*****************************************************************************/
204		406
205	static int *fdchanges;
206	static int fdchangemax, fdchangecnt;
207
208	static void	407	static void
209	fd_reify (void)	408	fd_reify (EV_P)
210	{	409	{
211	int i;	410	int i;
212		411
213	for (i = 0; i < fdchangecnt; ++i)	412	for (i = 0; i < fdchangecnt; ++i)
214	{	413	{
…		…
216	ANFD *anfd = anfds + fd;	415	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	416	struct ev_io *w;
218		417
219	int events = 0;	418	int events = 0;
220		419
221	for (w = anfd->head; w; w = w->next)	420	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
222	events |= w->events;	421	events |= w->events;
223		422
224	anfd->events &= ~EV_REIFY;	423	#if EV_SELECT_IS_WINSOCKET
225		424	if (events)
226	if (anfd->events != events)
227	{	425	{
228	method_modify (fd, anfd->events, events);	426	unsigned long argp;
229	anfd->events = events;	427	anfd->handle = _get_osfhandle (fd);
		428	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
230	}	429	}
		430	#endif
		431
		432	anfd->reify = 0;
		433
		434	method_modify (EV_A_ fd, anfd->events, events);
		435	anfd->events = events;
231	}	436	}
232		437
233	fdchangecnt = 0;	438	fdchangecnt = 0;
234	}	439	}
235		440
236	static void	441	static void
237	fd_change (int fd)	442	fd_change (EV_P_ int fd)
238	{	443	{
239	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	444	if (anfds [fd].reify)
240	return;	445	return;
241		446
242	anfds [fd].events |= EV_REIFY;	447	anfds [fd].reify = 1;
243		448
244	++fdchangecnt;	449	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	450	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
246	fdchanges [fdchangecnt - 1] = fd;	451	fdchanges [fdchangecnt - 1] = fd;
247	}	452	}
248		453
		454	static void
		455	fd_kill (EV_P_ int fd)
		456	{
		457	struct ev_io *w;
		458
		459	while ((w = (struct ev_io *)anfds [fd].head))
		460	{
		461	ev_io_stop (EV_A_ w);
		462	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		463	}
		464	}
		465
		466	static int
		467	fd_valid (int fd)
		468	{
		469	#ifdef _WIN32
		470	return _get_osfhandle (fd) != -1;
		471	#else
		472	return fcntl (fd, F_GETFD) != -1;
		473	#endif
		474	}
		475
249	/* called on EBADF to verify fds */	476	/* called on EBADF to verify fds */
250	static void	477	static void
251	fd_recheck (void)	478	fd_ebadf (EV_P)
252	{	479	{
253	int fd;	480	int fd;
254		481
255	for (fd = 0; fd < anfdmax; ++fd)	482	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	483	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	484	if (!fd_valid (fd) == -1 && errno == EBADF)
258	while (anfds [fd].head)	485	fd_kill (EV_A_ fd);
		486	}
		487
		488	/* called on ENOMEM in select/poll to kill some fds and retry */
		489	static void
		490	fd_enomem (EV_P)
		491	{
		492	int fd;
		493
		494	for (fd = anfdmax; fd--; )
		495	if (anfds [fd].events)
259	{	496	{
260	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	497	fd_kill (EV_A_ fd);
261	ev_io_stop (anfds [fd].head);	498	return;
262	}	499	}
		500	}
		501
		502	/* usually called after fork if method needs to re-arm all fds from scratch */
		503	static void
		504	fd_rearm_all (EV_P)
		505	{
		506	int fd;
		507
		508	/* this should be highly optimised to not do anything but set a flag */
		509	for (fd = 0; fd < anfdmax; ++fd)
		510	if (anfds [fd].events)
		511	{
		512	anfds [fd].events = 0;
		513	fd_change (EV_A_ fd);
		514	}
263	}	515	}
264		516
265	/*****************************************************************************/	517	/*****************************************************************************/
266		518
267	static struct ev_timer **timers;
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void	519	static void
274	upheap (WT *timers, int k)	520	upheap (WT *heap, int k)
275	{	521	{
276	WT w = timers [k];	522	WT w = heap [k];
277		523
278	while (k && timers [k >> 1]->at > w->at)	524	while (k && heap [k >> 1]->at > w->at)
279	{	525	{
280	timers [k] = timers [k >> 1];	526	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	527	((W)heap [k])->active = k + 1;
282	k >>= 1;	528	k >>= 1;
283	}	529	}
284		530
285	timers [k] = w;	531	heap [k] = w;
286	timers [k]->active = k + 1;	532	((W)heap [k])->active = k + 1;
287		533
288	}	534	}
289		535
290	static void	536	static void
291	downheap (WT *timers, int N, int k)	537	downheap (WT *heap, int N, int k)
292	{	538	{
293	WT w = timers [k];	539	WT w = heap [k];
294		540
295	while (k < (N >> 1))	541	while (k < (N >> 1))
296	{	542	{
297	int j = k << 1;	543	int j = k << 1;
298		544
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	545	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	546	++j;
301		547
302	if (w->at <= timers [j]->at)	548	if (w->at <= heap [j]->at)
303	break;	549	break;
304		550
305	timers [k] = timers [j];	551	heap [k] = heap [j];
306	timers [k]->active = k + 1;	552	((W)heap [k])->active = k + 1;
307	k = j;	553	k = j;
308	}	554	}
309		555
310	timers [k] = w;	556	heap [k] = w;
311	timers [k]->active = k + 1;	557	((W)heap [k])->active = k + 1;
		558	}
		559
		560	inline void
		561	adjustheap (WT *heap, int N, int k)
		562	{
		563	upheap (heap, k);
		564	downheap (heap, N, k);
312	}	565	}
313		566
314	/*****************************************************************************/	567	/*****************************************************************************/
315		568
316	typedef struct	569	typedef struct
317	{	570	{
318	struct ev_signal *head;	571	WL head;
319	sig_atomic_t gotsig;	572	sig_atomic_t volatile gotsig;
320	} ANSIG;	573	} ANSIG;
321		574
322	static ANSIG *signals;	575	static ANSIG *signals;
323	static int signalmax;	576	static int signalmax;
324		577
325	static int sigpipe [2];	578	static int sigpipe [2];
326	static sig_atomic_t gotsig;	579	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	580	static struct ev_io sigev;
328		581
329	static void	582	static void
330	signals_init (ANSIG *base, int count)	583	signals_init (ANSIG *base, int count)
331	{	584	{
332	while (count--)	585	while (count--)
333	{	586	{
334	base->head = 0;	587	base->head = 0;
335	base->gotsig = 0;	588	base->gotsig = 0;
		589
336	++base;	590	++base;
337	}	591	}
338	}	592	}
339		593
340	static void	594	static void
341	sighandler (int signum)	595	sighandler (int signum)
342	{	596	{
		597	#if _WIN32
		598	signal (signum, sighandler);
		599	#endif
		600
343	signals [signum - 1].gotsig = 1;	601	signals [signum - 1].gotsig = 1;
344		602
345	if (!gotsig)	603	if (!gotsig)
346	{	604	{
		605	int old_errno = errno;
347	gotsig = 1;	606	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	607	write (sigpipe [1], &signum, 1);
		608	errno = old_errno;
349	}	609	}
350	}	610	}
351		611
		612	void
		613	ev_feed_signal_event (EV_P_ int signum)
		614	{
		615	WL w;
		616
		617	#if EV_MULTIPLICITY
		618	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		619	#endif
		620
		621	--signum;
		622
		623	if (signum < 0 || signum >= signalmax)
		624	return;
		625
		626	signals [signum].gotsig = 0;
		627
		628	for (w = signals [signum].head; w; w = w->next)
		629	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		630	}
		631
352	static void	632	static void
353	sigcb (struct ev_io *iow, int revents)	633	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	634	{
355	struct ev_signal *w;
356	int sig;	635	int signum;
357		636
		637	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	638	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		639
361	for (sig = signalmax; sig--; )	640	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	641	if (signals [signum].gotsig)
363	{	642	ev_feed_signal_event (EV_A_ signum + 1);
364	signals [sig].gotsig = 0;
365
366	for (w = signals [sig].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);
368	}
369	}	643	}
370		644
371	static void	645	inline void
372	siginit (void)	646	fd_intern (int fd)
373	{	647	{
		648	#ifdef _WIN32
		649	int arg = 1;
		650	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		651	#else
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	652	fcntl (fd, F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376
377	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	653	fcntl (fd, F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	654	#endif
		655	}
		656
		657	static void
		658	siginit (EV_P)
		659	{
		660	fd_intern (sigpipe [0]);
		661	fd_intern (sigpipe [1]);
380		662
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	663	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	664	ev_io_start (EV_A_ &sigev);
		665	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	666	}
384		667
385	/*****************************************************************************/	668	/*****************************************************************************/
386		669
387	static struct ev_idle **idles;
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397
398	static struct ev_child *childs [PID_HASHSIZE];	670	static struct ev_child *childs [PID_HASHSIZE];
		671
		672	#ifndef _WIN32
		673
399	static struct ev_signal childev;	674	static struct ev_signal childev;
400		675
401	#ifndef WCONTINUED	676	#ifndef WCONTINUED
402	# define WCONTINUED 0	677	# define WCONTINUED 0
403	#endif	678	#endif
404		679
405	static void	680	static void
406	childcb (struct ev_signal *sw, int revents)	681	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	682	{
408	struct ev_child *w;	683	struct ev_child *w;
		684
		685	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		686	if (w->pid == pid || !w->pid)
		687	{
		688	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		689	w->rpid = pid;
		690	w->rstatus = status;
		691	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		692	}
		693	}
		694
		695	static void
		696	childcb (EV_P_ struct ev_signal *sw, int revents)
		697	{
409	int pid, status;	698	int pid, status;
410		699
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	700	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	701	{
413	if (w->pid == pid || w->pid == -1)	702	/* make sure we are called again until all childs have been reaped */
414	{	703	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
415	w->status = status;	704
416	event ((W)w, EV_CHILD);	705	child_reap (EV_A_ sw, pid, pid, status);
417	}	706	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		707	}
418	}	708	}
		709
		710	#endif
419		711
420	/*****************************************************************************/	712	/*****************************************************************************/
421		713
		714	#if EV_USE_KQUEUE
		715	# include "ev_kqueue.c"
		716	#endif
422	#if EV_USE_EPOLL	717	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	718	# include "ev_epoll.c"
424	#endif	719	#endif
		720	#if EV_USE_POLL
		721	# include "ev_poll.c"
		722	#endif
425	#if EV_USE_SELECT	723	#if EV_USE_SELECT
426	# include "ev_select.c"	724	# include "ev_select.c"
427	#endif	725	#endif
428		726
429	int	727	int
…		…
436	ev_version_minor (void)	734	ev_version_minor (void)
437	{	735	{
438	return EV_VERSION_MINOR;	736	return EV_VERSION_MINOR;
439	}	737	}
440		738
441	int ev_init (int flags)	739	/* return true if we are running with elevated privileges and should ignore env variables */
		740	static int
		741	enable_secure (void)
442	{	742	{
		743	#ifdef _WIN32
		744	return 0;
		745	#else
		746	return getuid () != geteuid ()
		747	|| getgid () != getegid ();
		748	#endif
		749	}
		750
		751	unsigned int
		752	ev_method (EV_P)
		753	{
		754	return method;
		755	}
		756
		757	static void
		758	loop_init (EV_P_ unsigned int flags)
		759	{
443	if (!ev_method)	760	if (!method)
444	{	761	{
445	#if EV_USE_MONOTONIC	762	#if EV_USE_MONOTONIC
446	{	763	{
447	struct timespec ts;	764	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	765	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	766	have_monotonic = 1;
450	}	767	}
451	#endif	768	#endif
452		769
453	ev_now = ev_time ();	770	ev_rt_now = ev_time ();
454	now = get_clock ();	771	mn_now = get_clock ();
		772	now_floor = mn_now;
455	diff = ev_now - now;	773	rtmn_diff = ev_rt_now - mn_now;
456		774
457	if (pipe (sigpipe))	775	if (!(flags & EVMETHOD_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
458	return 0;	776	flags = atoi (getenv ("LIBEV_FLAGS"));
459		777
460	ev_method = EVMETHOD_NONE;	778	if (!(flags & 0x0000ffff))
		779	flags |= 0x0000ffff;
		780
		781	method = 0;
		782	#if EV_USE_KQUEUE
		783	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		784	#endif
461	#if EV_USE_EPOLL	785	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	786	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
		787	#endif
		788	#if EV_USE_POLL
		789	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
463	#endif	790	#endif
464	#if EV_USE_SELECT	791	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	792	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
466	#endif	793	#endif
467		794
		795	ev_init (&sigev, sigcb);
		796	ev_set_priority (&sigev, EV_MAXPRI);
		797	}
		798	}
		799
		800	void
		801	loop_destroy (EV_P)
		802	{
		803	int i;
		804
		805	#if EV_USE_KQUEUE
		806	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		807	#endif
		808	#if EV_USE_EPOLL
		809	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		810	#endif
		811	#if EV_USE_POLL
		812	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		813	#endif
		814	#if EV_USE_SELECT
		815	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		816	#endif
		817
		818	for (i = NUMPRI; i--; )
		819	array_free (pending, [i]);
		820
		821	/* have to use the microsoft-never-gets-it-right macro */
		822	array_free (fdchange, EMPTY);
		823	array_free (timer, EMPTY);
		824	#if EV_PERIODICS
		825	array_free (periodic, EMPTY);
		826	#endif
		827	array_free (idle, EMPTY);
		828	array_free (prepare, EMPTY);
		829	array_free (check, EMPTY);
		830
		831	method = 0;
		832	}
		833
		834	static void
		835	loop_fork (EV_P)
		836	{
		837	#if EV_USE_EPOLL
		838	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		839	#endif
		840	#if EV_USE_KQUEUE
		841	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		842	#endif
		843
		844	if (ev_is_active (&sigev))
		845	{
		846	/* default loop */
		847
		848	ev_ref (EV_A);
		849	ev_io_stop (EV_A_ &sigev);
		850	close (sigpipe [0]);
		851	close (sigpipe [1]);
		852
		853	while (pipe (sigpipe))
		854	syserr ("(libev) error creating pipe");
		855
		856	siginit (EV_A);
		857	}
		858
		859	postfork = 0;
		860	}
		861
		862	#if EV_MULTIPLICITY
		863	struct ev_loop *
		864	ev_loop_new (unsigned int flags)
		865	{
		866	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		867
		868	memset (loop, 0, sizeof (struct ev_loop));
		869
		870	loop_init (EV_A_ flags);
		871
		872	if (ev_method (EV_A))
		873	return loop;
		874
		875	return 0;
		876	}
		877
		878	void
		879	ev_loop_destroy (EV_P)
		880	{
		881	loop_destroy (EV_A);
		882	ev_free (loop);
		883	}
		884
		885	void
		886	ev_loop_fork (EV_P)
		887	{
		888	postfork = 1;
		889	}
		890
		891	#endif
		892
		893	#if EV_MULTIPLICITY
		894	struct ev_loop *
		895	#else
		896	int
		897	#endif
		898	ev_default_loop (unsigned int flags)
		899	{
		900	if (sigpipe [0] == sigpipe [1])
		901	if (pipe (sigpipe))
		902	return 0;
		903
		904	if (!default_loop)
		905	{
		906	#if EV_MULTIPLICITY
		907	struct ev_loop *loop = default_loop = &default_loop_struct;
		908	#else
		909	default_loop = 1;
		910	#endif
		911
		912	loop_init (EV_A_ flags);
		913
468	if (ev_method)	914	if (ev_method (EV_A))
469	{	915	{
470	ev_watcher_init (&sigev, sigcb);
471	siginit ();	916	siginit (EV_A);
472		917
		918	#ifndef _WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	919	ev_signal_init (&childev, childcb, SIGCHLD);
		920	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	921	ev_signal_start (EV_A_ &childev);
		922	ev_unref (EV_A); /* child watcher should not keep loop alive */
		923	#endif
475	}	924	}
		925	else
		926	default_loop = 0;
476	}	927	}
477		928
478	return ev_method;	929	return default_loop;
		930	}
		931
		932	void
		933	ev_default_destroy (void)
		934	{
		935	#if EV_MULTIPLICITY
		936	struct ev_loop *loop = default_loop;
		937	#endif
		938
		939	#ifndef _WIN32
		940	ev_ref (EV_A); /* child watcher */
		941	ev_signal_stop (EV_A_ &childev);
		942	#endif
		943
		944	ev_ref (EV_A); /* signal watcher */
		945	ev_io_stop (EV_A_ &sigev);
		946
		947	close (sigpipe [0]); sigpipe [0] = 0;
		948	close (sigpipe [1]); sigpipe [1] = 0;
		949
		950	loop_destroy (EV_A);
		951	}
		952
		953	void
		954	ev_default_fork (void)
		955	{
		956	#if EV_MULTIPLICITY
		957	struct ev_loop *loop = default_loop;
		958	#endif
		959
		960	if (method)
		961	postfork = 1;
479	}	962	}
480		963
481	/*****************************************************************************/	964	/*****************************************************************************/
482		965
483	void
484	ev_prefork (void)
485	{
486	/* nop */
487	}
488
489	void
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif
502
503	ev_io_stop (&sigev);
504	close (sigpipe [0]);
505	close (sigpipe [1]);
506	pipe (sigpipe);
507	siginit ();
508	}
509
510	/*****************************************************************************/
511
512	static void	966	static int
		967	any_pending (EV_P)
		968	{
		969	int pri;
		970
		971	for (pri = NUMPRI; pri--; )
		972	if (pendingcnt [pri])
		973	return 1;
		974
		975	return 0;
		976	}
		977
		978	static void
513	call_pending (void)	979	call_pending (EV_P)
514	{	980	{
		981	int pri;
		982
		983	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	984	while (pendingcnt [pri])
516	{	985	{
517	ANPENDING *p = pendings + --pendingcnt;	986	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		987
519	if (p->w)	988	if (p->w)
520	{	989	{
521	p->w->pending = 0;	990	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	991	EV_CB_INVOKE (p->w, p->events);
523	}	992	}
524	}	993	}
525	}	994	}
526		995
527	static void	996	static void
528	timers_reify (void)	997	timers_reify (EV_P)
529	{	998	{
530	while (timercnt && timers [0]->at <= now)	999	while (timercnt && ((WT)timers [0])->at <= mn_now)
531	{	1000	{
532	struct ev_timer *w = timers [0];	1001	struct ev_timer *w = timers [0];
533		1002
534	event ((W)w, EV_TIMEOUT);	1003	assert (("inactive timer on timer heap detected", ev_is_active (w)));
535		1004
536	/* first reschedule or stop timer */	1005	/* first reschedule or stop timer */
537	if (w->repeat)	1006	if (w->repeat)
538	{	1007	{
		1008	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1009
539	w->at = now + w->repeat;	1010	((WT)w)->at += w->repeat;
540	assert (("timer timeout in the past, negative repeat?", w->at > now));	1011	if (((WT)w)->at < mn_now)
		1012	((WT)w)->at = mn_now;
		1013
541	downheap ((WT *)timers, timercnt, 0);	1014	downheap ((WT *)timers, timercnt, 0);
542	}	1015	}
543	else	1016	else
544	ev_timer_stop (w); /* nonrepeating: stop timer */	1017	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
545	}
546	}
547		1018
		1019	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1020	}
		1021	}
		1022
		1023	#if EV_PERIODICS
548	static void	1024	static void
549	periodics_reify (void)	1025	periodics_reify (EV_P)
550	{	1026	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	1027	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
552	{	1028	{
553	struct ev_periodic *w = periodics [0];	1029	struct ev_periodic *w = periodics [0];
554		1030
		1031	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1032
555	/* first reschedule or stop timer */	1033	/* first reschedule or stop timer */
556	if (w->interval)	1034	if (w->reschedule_cb)
557	{	1035	{
		1036	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1037	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1038	downheap ((WT *)periodics, periodiccnt, 0);
		1039	}
		1040	else if (w->interval)
		1041	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1042	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
559	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1043	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	1044	downheap ((WT *)periodics, periodiccnt, 0);
561	}	1045	}
562	else	1046	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	1047	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		1048
565	event ((W)w, EV_TIMEOUT);	1049	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566	}	1050	}
567	}	1051	}
568		1052
569	static void	1053	static void
570	periodics_reschedule (ev_tstamp diff)	1054	periodics_reschedule (EV_P)
571	{	1055	{
572	int i;	1056	int i;
573		1057
574	/* adjust periodics after time jump */	1058	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	1059	for (i = 0; i < periodiccnt; ++i)
576	{	1060	{
577	struct ev_periodic *w = periodics [i];	1061	struct ev_periodic *w = periodics [i];
578		1062
		1063	if (w->reschedule_cb)
		1064	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
579	if (w->interval)	1065	else if (w->interval)
		1066	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1067	}
		1068
		1069	/* now rebuild the heap */
		1070	for (i = periodiccnt >> 1; i--; )
		1071	downheap ((WT *)periodics, periodiccnt, i);
		1072	}
		1073	#endif
		1074
		1075	inline int
		1076	time_update_monotonic (EV_P)
		1077	{
		1078	mn_now = get_clock ();
		1079
		1080	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1081	{
		1082	ev_rt_now = rtmn_diff + mn_now;
		1083	return 0;
		1084	}
		1085	else
		1086	{
		1087	now_floor = mn_now;
		1088	ev_rt_now = ev_time ();
		1089	return 1;
		1090	}
		1091	}
		1092
		1093	static void
		1094	time_update (EV_P)
		1095	{
		1096	int i;
		1097
		1098	#if EV_USE_MONOTONIC
		1099	if (expect_true (have_monotonic))
		1100	{
		1101	if (time_update_monotonic (EV_A))
580	{	1102	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1103	ev_tstamp odiff = rtmn_diff;
582		1104
583	if (fabs (diff) >= 1e-4)	1105	for (i = 4; --i; ) /* loop a few times, before making important decisions */
584	{	1106	{
585	ev_periodic_stop (w);	1107	rtmn_diff = ev_rt_now - mn_now;
586	ev_periodic_start (w);
587		1108
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1109	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1110	return; /* all is well */
		1111
		1112	ev_rt_now = ev_time ();
		1113	mn_now = get_clock ();
		1114	now_floor = mn_now;
589	}	1115	}
		1116
		1117	# if EV_PERIODICS
		1118	periodics_reschedule (EV_A);
		1119	# endif
		1120	/* no timer adjustment, as the monotonic clock doesn't jump */
		1121	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
590	}	1122	}
591	}	1123	}
592	}	1124	else
593		1125	#endif
594	static void	1126	{
595	time_update (void)
596	{
597	int i;
598
599	ev_now = ev_time ();	1127	ev_rt_now = ev_time ();
600		1128
601	if (have_monotonic)	1129	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
602	{
603	ev_tstamp odiff = diff;
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	1130	{
607	now = get_clock ();	1131	#if EV_PERIODICS
608	diff = ev_now - now;
609
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)
611	return; /* all is well */
612
613	ev_now = ev_time ();
614	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}
619	else
620	{
621	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
622	{
623	periodics_reschedule (ev_now - now);	1132	periodics_reschedule (EV_A);
		1133	#endif
624		1134
625	/* adjust timers. this is easy, as the offset is the same for all */	1135	/* adjust timers. this is easy, as the offset is the same for all */
626	for (i = 0; i < timercnt; ++i)	1136	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	1137	((WT)timers [i])->at += ev_rt_now - mn_now;
628	}	1138	}
629		1139
630	now = ev_now;	1140	mn_now = ev_rt_now;
631	}	1141	}
632	}	1142	}
633		1143
634	int ev_loop_done;	1144	void
		1145	ev_ref (EV_P)
		1146	{
		1147	++activecnt;
		1148	}
635		1149
		1150	void
		1151	ev_unref (EV_P)
		1152	{
		1153	--activecnt;
		1154	}
		1155
		1156	static int loop_done;
		1157
		1158	void
636	void ev_loop (int flags)	1159	ev_loop (EV_P_ int flags)
637	{	1160	{
638	double block;	1161	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1162	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
640		1163
641	do	1164	do
642	{	1165	{
643	/* queue check watchers (and execute them) */	1166	/* queue check watchers (and execute them) */
644	if (preparecnt)	1167	if (expect_false (preparecnt))
645	{	1168	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1169	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	1170	call_pending (EV_A);
648	}	1171	}
649		1172
		1173	/* we might have forked, so reify kernel state if necessary */
		1174	if (expect_false (postfork))
		1175	loop_fork (EV_A);
		1176
650	/* update fd-related kernel structures */	1177	/* update fd-related kernel structures */
651	fd_reify ();	1178	fd_reify (EV_A);
652		1179
653	/* calculate blocking time */	1180	/* calculate blocking time */
654		1181
655	/* we only need this for !monotonic clockor timers, but as we basically	1182	/* we only need this for !monotonic clock or timers, but as we basically
656	always have timers, we just calculate it always */	1183	always have timers, we just calculate it always */
		1184	#if EV_USE_MONOTONIC
		1185	if (expect_true (have_monotonic))
		1186	time_update_monotonic (EV_A);
		1187	else
		1188	#endif
		1189	{
657	ev_now = ev_time ();	1190	ev_rt_now = ev_time ();
		1191	mn_now = ev_rt_now;
		1192	}
658		1193
659	if (flags & EVLOOP_NONBLOCK || idlecnt)	1194	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;	1195	block = 0.;
661	else	1196	else
662	{	1197	{
663	block = MAX_BLOCKTIME;	1198	block = MAX_BLOCKTIME;
664		1199
665	if (timercnt)	1200	if (timercnt)
666	{	1201	{
667	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1202	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
668	if (block > to) block = to;	1203	if (block > to) block = to;
669	}	1204	}
670		1205
		1206	#if EV_PERIODICS
671	if (periodiccnt)	1207	if (periodiccnt)
672	{	1208	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1209	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
674	if (block > to) block = to;	1210	if (block > to) block = to;
675	}	1211	}
		1212	#endif
676		1213
677	if (block < 0.) block = 0.;	1214	if (block < 0.) block = 0.;
678	}	1215	}
679		1216
680	method_poll (block);	1217	method_poll (EV_A_ block);
681		1218
682	/* update ev_now, do magic */	1219	/* update ev_rt_now, do magic */
683	time_update ();	1220	time_update (EV_A);
684		1221
685	/* queue pending timers and reschedule them */	1222	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1223	timers_reify (EV_A); /* relative timers called last */
		1224	#if EV_PERIODICS
687	periodics_reify (); /* absolute timers called first */	1225	periodics_reify (EV_A); /* absolute timers called first */
		1226	#endif
688		1227
689	/* queue idle watchers unless io or timers are pending */	1228	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	1229	if (idlecnt && !any_pending (EV_A))
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1230	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		1231
693	/* queue check watchers, to be executed first */	1232	/* queue check watchers, to be executed first */
694	if (checkcnt)	1233	if (checkcnt)
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1234	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1235
697	call_pending ();	1236	call_pending (EV_A);
698	}	1237	}
699	while (!ev_loop_done);	1238	while (activecnt && !loop_done);
700		1239
701	if (ev_loop_done != 2)	1240	if (loop_done != 2)
702	ev_loop_done = 0;	1241	loop_done = 0;
		1242	}
		1243
		1244	void
		1245	ev_unloop (EV_P_ int how)
		1246	{
		1247	loop_done = how;
703	}	1248	}
704		1249
705	/*****************************************************************************/	1250	/*****************************************************************************/
706		1251
707	static void	1252	inline void
708	wlist_add (WL *head, WL elem)	1253	wlist_add (WL *head, WL elem)
709	{	1254	{
710	elem->next = *head;	1255	elem->next = *head;
711	*head = elem;	1256	*head = elem;
712	}	1257	}
713		1258
714	static void	1259	inline void
715	wlist_del (WL *head, WL elem)	1260	wlist_del (WL *head, WL elem)
716	{	1261	{
717	while (*head)	1262	while (*head)
718	{	1263	{
719	if (*head == elem)	1264	if (*head == elem)
…		…
724		1269
725	head = &(*head)->next;	1270	head = &(*head)->next;
726	}	1271	}
727	}	1272	}
728		1273
729	static void	1274	inline void
730	ev_clear (W w)	1275	ev_clear_pending (EV_P_ W w)
731	{	1276	{
732	if (w->pending)	1277	if (w->pending)
733	{	1278	{
734	pendings [w->pending - 1].w = 0;	1279	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1280	w->pending = 0;
736	}	1281	}
737	}	1282	}
738		1283
739	static void	1284	inline void
740	ev_start (W w, int active)	1285	ev_start (EV_P_ W w, int active)
741	{	1286	{
		1287	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1288	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1289
742	w->active = active;	1290	w->active = active;
		1291	ev_ref (EV_A);
743	}	1292	}
744		1293
745	static void	1294	inline void
746	ev_stop (W w)	1295	ev_stop (EV_P_ W w)
747	{	1296	{
		1297	ev_unref (EV_A);
748	w->active = 0;	1298	w->active = 0;
749	}	1299	}
750		1300
751	/*****************************************************************************/	1301	/*****************************************************************************/
752		1302
753	void	1303	void
754	ev_io_start (struct ev_io *w)	1304	ev_io_start (EV_P_ struct ev_io *w)
755	{	1305	{
		1306	int fd = w->fd;
		1307
756	if (ev_is_active (w))	1308	if (ev_is_active (w))
757	return;	1309	return;
758		1310
759	int fd = w->fd;	1311	assert (("ev_io_start called with negative fd", fd >= 0));
760		1312
761	ev_start ((W)w, 1);	1313	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1314	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1315	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1316
765	fd_change (fd);	1317	fd_change (EV_A_ fd);
766	}	1318	}
767		1319
768	void	1320	void
769	ev_io_stop (struct ev_io *w)	1321	ev_io_stop (EV_P_ struct ev_io *w)
770	{	1322	{
771	ev_clear ((W)w);	1323	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1324	if (!ev_is_active (w))
773	return;	1325	return;
774		1326
		1327	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1328
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1329	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1330	ev_stop (EV_A_ (W)w);
777		1331
778	fd_change (w->fd);	1332	fd_change (EV_A_ w->fd);
779	}	1333	}
780		1334
781	void	1335	void
782	ev_timer_start (struct ev_timer *w)	1336	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1337	{
784	if (ev_is_active (w))	1338	if (ev_is_active (w))
785	return;	1339	return;
786		1340
787	w->at += now;	1341	((WT)w)->at += mn_now;
788		1342
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1343	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1344
791	ev_start ((W)w, ++timercnt);	1345	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1346	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
793	timers [timercnt - 1] = w;	1347	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1348	upheap ((WT *)timers, timercnt - 1);
795	}
796		1349
		1350	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1351	}
		1352
797	void	1353	void
798	ev_timer_stop (struct ev_timer *w)	1354	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1355	{
800	ev_clear ((W)w);	1356	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1357	if (!ev_is_active (w))
802	return;	1358	return;
803		1359
		1360	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1361
804	if (w->active < timercnt--)	1362	if (((W)w)->active < timercnt--)
805	{	1363	{
806	timers [w->active - 1] = timers [timercnt];	1364	timers [((W)w)->active - 1] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1365	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
808	}	1366	}
809		1367
810	w->at = w->repeat;	1368	((WT)w)->at -= mn_now;
811		1369
812	ev_stop ((W)w);	1370	ev_stop (EV_A_ (W)w);
813	}	1371	}
814		1372
815	void	1373	void
816	ev_timer_again (struct ev_timer *w)	1374	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1375	{
818	if (ev_is_active (w))	1376	if (ev_is_active (w))
819	{	1377	{
820	if (w->repeat)	1378	if (w->repeat)
821	{	1379	{
822	w->at = now + w->repeat;	1380	((WT)w)->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1381	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
824	}	1382	}
825	else	1383	else
826	ev_timer_stop (w);	1384	ev_timer_stop (EV_A_ w);
827	}	1385	}
828	else if (w->repeat)	1386	else if (w->repeat)
		1387	{
		1388	w->at = w->repeat;
829	ev_timer_start (w);	1389	ev_timer_start (EV_A_ w);
		1390	}
830	}	1391	}
831		1392
		1393	#if EV_PERIODICS
832	void	1394	void
833	ev_periodic_start (struct ev_periodic *w)	1395	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1396	{
835	if (ev_is_active (w))	1397	if (ev_is_active (w))
836	return;	1398	return;
837		1399
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1400	if (w->reschedule_cb)
839		1401	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1402	else if (w->interval)
		1403	{
		1404	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1405	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1406	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1407	}
843		1408
844	ev_start ((W)w, ++periodiccnt);	1409	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1410	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
846	periodics [periodiccnt - 1] = w;	1411	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1412	upheap ((WT *)periodics, periodiccnt - 1);
848	}
849		1413
		1414	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1415	}
		1416
850	void	1417	void
851	ev_periodic_stop (struct ev_periodic *w)	1418	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1419	{
853	ev_clear ((W)w);	1420	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1421	if (!ev_is_active (w))
855	return;	1422	return;
856		1423
		1424	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1425
857	if (w->active < periodiccnt--)	1426	if (((W)w)->active < periodiccnt--)
858	{	1427	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1428	periodics [((W)w)->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1429	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
861	}	1430	}
862		1431
863	ev_stop ((W)w);	1432	ev_stop (EV_A_ (W)w);
864	}	1433	}
865		1434
866	void	1435	void
		1436	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1437	{
		1438	/* TODO: use adjustheap and recalculation */
		1439	ev_periodic_stop (EV_A_ w);
		1440	ev_periodic_start (EV_A_ w);
		1441	}
		1442	#endif
		1443
		1444	void
867	ev_signal_start (struct ev_signal *w)	1445	ev_idle_start (EV_P_ struct ev_idle *w)
868	{	1446	{
869	if (ev_is_active (w))	1447	if (ev_is_active (w))
870	return;	1448	return;
871		1449
		1450	ev_start (EV_A_ (W)w, ++idlecnt);
		1451	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1452	idles [idlecnt - 1] = w;
		1453	}
		1454
		1455	void
		1456	ev_idle_stop (EV_P_ struct ev_idle *w)
		1457	{
		1458	ev_clear_pending (EV_A_ (W)w);
		1459	if (!ev_is_active (w))
		1460	return;
		1461
		1462	idles [((W)w)->active - 1] = idles [--idlecnt];
		1463	ev_stop (EV_A_ (W)w);
		1464	}
		1465
		1466	void
		1467	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1468	{
		1469	if (ev_is_active (w))
		1470	return;
		1471
		1472	ev_start (EV_A_ (W)w, ++preparecnt);
		1473	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1474	prepares [preparecnt - 1] = w;
		1475	}
		1476
		1477	void
		1478	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1479	{
		1480	ev_clear_pending (EV_A_ (W)w);
		1481	if (!ev_is_active (w))
		1482	return;
		1483
		1484	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1485	ev_stop (EV_A_ (W)w);
		1486	}
		1487
		1488	void
		1489	ev_check_start (EV_P_ struct ev_check *w)
		1490	{
		1491	if (ev_is_active (w))
		1492	return;
		1493
		1494	ev_start (EV_A_ (W)w, ++checkcnt);
		1495	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1496	checks [checkcnt - 1] = w;
		1497	}
		1498
		1499	void
		1500	ev_check_stop (EV_P_ struct ev_check *w)
		1501	{
		1502	ev_clear_pending (EV_A_ (W)w);
		1503	if (!ev_is_active (w))
		1504	return;
		1505
		1506	checks [((W)w)->active - 1] = checks [--checkcnt];
		1507	ev_stop (EV_A_ (W)w);
		1508	}
		1509
		1510	#ifndef SA_RESTART
		1511	# define SA_RESTART 0
		1512	#endif
		1513
		1514	void
		1515	ev_signal_start (EV_P_ struct ev_signal *w)
		1516	{
		1517	#if EV_MULTIPLICITY
		1518	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1519	#endif
		1520	if (ev_is_active (w))
		1521	return;
		1522
		1523	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1524
872	ev_start ((W)w, 1);	1525	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1526	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1527	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1528
876	if (!w->next)	1529	if (!((WL)w)->next)
877	{	1530	{
		1531	#if _WIN32
		1532	signal (w->signum, sighandler);
		1533	#else
878	struct sigaction sa;	1534	struct sigaction sa;
879	sa.sa_handler = sighandler;	1535	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1536	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1537	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1538	sigaction (w->signum, &sa, 0);
		1539	#endif
883	}	1540	}
884	}	1541	}
885		1542
886	void	1543	void
887	ev_signal_stop (struct ev_signal *w)	1544	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1545	{
889	ev_clear ((W)w);	1546	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1547	if (!ev_is_active (w))
891	return;	1548	return;
892		1549
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1550	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1551	ev_stop (EV_A_ (W)w);
895		1552
896	if (!signals [w->signum - 1].head)	1553	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1554	signal (w->signum, SIG_DFL);
898	}	1555	}
899		1556
900	void	1557	void
901	ev_idle_start (struct ev_idle *w)	1558	ev_child_start (EV_P_ struct ev_child *w)
902	{	1559	{
		1560	#if EV_MULTIPLICITY
		1561	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1562	#endif
903	if (ev_is_active (w))	1563	if (ev_is_active (w))
904	return;	1564	return;
905		1565
906	ev_start ((W)w, ++idlecnt);
907	array_needsize (idles, idlemax, idlecnt, );
908	idles [idlecnt - 1] = w;
909	}
910
911	void
912	ev_idle_stop (struct ev_idle *w)
913	{
914	ev_clear ((W)w);
915	if (ev_is_active (w))
916	return;
917
918	idles [w->active - 1] = idles [--idlecnt];
919	ev_stop ((W)w);
920	}
921
922	void
923	ev_prepare_start (struct ev_prepare *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );
930	prepares [preparecnt - 1] = w;
931	}
932
933	void
934	ev_prepare_stop (struct ev_prepare *w)
935	{
936	ev_clear ((W)w);
937	if (ev_is_active (w))
938	return;
939
940	prepares [w->active - 1] = prepares [--preparecnt];
941	ev_stop ((W)w);
942	}
943
944	void
945	ev_check_start (struct ev_check *w)
946	{
947	if (ev_is_active (w))
948	return;
949
950	ev_start ((W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );
952	checks [checkcnt - 1] = w;
953	}
954
955	void
956	ev_check_stop (struct ev_check *w)
957	{
958	ev_clear ((W)w);
959	if (ev_is_active (w))
960	return;
961
962	checks [w->active - 1] = checks [--checkcnt];
963	ev_stop ((W)w);
964	}
965
966	void
967	ev_child_start (struct ev_child *w)
968	{
969	if (ev_is_active (w))
970	return;
971
972	ev_start ((W)w, 1);	1566	ev_start (EV_A_ (W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1567	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}	1568	}
975		1569
976	void	1570	void
977	ev_child_stop (struct ev_child *w)	1571	ev_child_stop (EV_P_ struct ev_child *w)
978	{	1572	{
979	ev_clear ((W)w);	1573	ev_clear_pending (EV_A_ (W)w);
980	if (ev_is_active (w))	1574	if (!ev_is_active (w))
981	return;	1575	return;
982		1576
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1577	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1578	ev_stop (EV_A_ (W)w);
985	}	1579	}
986		1580
987	/*****************************************************************************/	1581	/*****************************************************************************/
988		1582
989	struct ev_once	1583	struct ev_once
…		…
993	void (*cb)(int revents, void *arg);	1587	void (*cb)(int revents, void *arg);
994	void *arg;	1588	void *arg;
995	};	1589	};
996		1590
997	static void	1591	static void
998	once_cb (struct ev_once *once, int revents)	1592	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1593	{
1000	void (*cb)(int revents, void *arg) = once->cb;	1594	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	1595	void *arg = once->arg;
1002		1596
1003	ev_io_stop (&once->io);	1597	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1598	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1599	ev_free (once);
1006		1600
1007	cb (revents, arg);	1601	cb (revents, arg);
1008	}	1602	}
1009		1603
1010	static void	1604	static void
1011	once_cb_io (struct ev_io *w, int revents)	1605	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1606	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1607	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014	}	1608	}
1015		1609
1016	static void	1610	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1611	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1612	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1613	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020	}	1614	}
1021		1615
1022	void	1616	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1617	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024	{	1618	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1619	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026		1620
1027	if (!once)	1621	if (!once)
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1622	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029	else	1623	else
1030	{	1624	{
1031	once->cb = cb;	1625	once->cb = cb;
1032	once->arg = arg;	1626	once->arg = arg;
1033		1627
1034	ev_watcher_init (&once->io, once_cb_io);	1628	ev_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1629	if (fd >= 0)
1036	{	1630	{
1037	ev_io_set (&once->io, fd, events);	1631	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1632	ev_io_start (EV_A_ &once->io);
1039	}	1633	}
1040		1634
1041	ev_watcher_init (&once->to, once_cb_to);	1635	ev_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1636	if (timeout >= 0.)
1043	{	1637	{
1044	ev_timer_set (&once->to, timeout, 0.);	1638	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1639	ev_timer_start (EV_A_ &once->to);
1046	}	1640	}
1047	}	1641	}
1048	}	1642	}
1049		1643
1050	/*****************************************************************************/	1644	#ifdef __cplusplus
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}	1645	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif	1646	#endif
1106		1647
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}
1127
1128	#endif
1129
1130
1131
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