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Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.107 by root, Mon Nov 12 01:20:25 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# include "config.h"
		38
		39	# if HAVE_CLOCK_GETTIME
		40	# ifndef EV_USE_MONOTONIC
		41	# define EV_USE_MONOTONIC 1
		42	# endif
		43	# ifndef EV_USE_REALTIME
		44	# define EV_USE_REALTIME 1
		45	# endif
		46	# 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
		64	#endif
		65
30	#include <math.h>	66	#include <math.h>
31	#include <stdlib.h>	67	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	68	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	69	#include <stddef.h>
36		70
37	#include <stdio.h>	71	#include <stdio.h>
38		72
39	#include <assert.h>	73	#include <assert.h>
40	#include <errno.h>	74	#include <errno.h>
41	#include <sys/types.h>	75	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	76	#include <time.h>
45		77
46	#ifndef HAVE_MONOTONIC	78	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	79
48	# define HAVE_MONOTONIC 1	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
49	# endif	89	# endif
50	#endif	90	#endif
51		91
		92	/**/
		93
		94	#ifndef EV_USE_MONOTONIC
		95	# define EV_USE_MONOTONIC 1
		96	#endif
		97
52	#ifndef HAVE_SELECT	98	#ifndef EV_USE_SELECT
53	# define HAVE_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
54	#endif	108	# endif
		109	#endif
55		110
56	#ifndef HAVE_EPOLL	111	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	112	# define EV_USE_EPOLL 0
58	#endif	113	#endif
59		114
		115	#ifndef EV_USE_KQUEUE
		116	# define EV_USE_KQUEUE 0
		117	#endif
		118
60	#ifndef HAVE_REALTIME	119	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	120	# define EV_USE_REALTIME 1
62	#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	/**/
63		146
64	#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) */
65	#define MAX_BLOCKTIME 60.	148	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#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 */
67		151
		152	#ifdef EV_H
		153	# include EV_H
		154	#else
68	#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 */
69		173
70	typedef struct ev_watcher *W;	174	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	175	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	176	typedef struct ev_watcher_time *WT;
73		177
74	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
75	ev_tstamp ev_now;	267	ev_tstamp ev_rt_now;
76	int ev_method;	268	#define VAR(name,decl) static decl;
		269	#include "ev_vars.h"
		270	#undef VAR
77		271
78	static int have_monotonic; /* runtime */	272	static int default_loop;
79		273
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	274	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		275
84	/*****************************************************************************/	276	/*****************************************************************************/
85		277
86	ev_tstamp	278	ev_tstamp
87	ev_time (void)	279	ev_time (void)
88	{	280	{
89	#if HAVE_REALTIME	281	#if EV_USE_REALTIME
90	struct timespec ts;	282	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	283	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	284	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	285	#else
94	struct timeval tv;	286	struct timeval tv;
95	gettimeofday (&tv, 0);	287	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	288	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	289	#endif
98	}	290	}
99		291
100	static ev_tstamp	292	inline ev_tstamp
101	get_clock (void)	293	get_clock (void)
102	{	294	{
103	#if HAVE_MONOTONIC	295	#if EV_USE_MONOTONIC
104	if (have_monotonic)	296	if (expect_true (have_monotonic))
105	{	297	{
106	struct timespec ts;	298	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	299	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	300	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	301	}
110	#endif	302	#endif
111		303
112	return ev_time ();	304	return ev_time ();
113	}	305	}
114		306
		307	#if EV_MULTIPLICITY
		308	ev_tstamp
		309	ev_now (EV_P)
		310	{
		311	return ev_rt_now;
		312	}
		313	#endif
		314
		315	#define array_roundsize(type,n) ((n) | 4 & ~3)
		316
115	#define array_needsize(base,cur,cnt,init) \	317	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	318	if (expect_false ((cnt) > cur)) \
117	{ \	319	{ \
118	int newcnt = cur; \	320	int newcnt = cur; \
119	do \	321	do \
120	{ \	322	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	323	newcnt = array_roundsize (type, newcnt << 1); \
122	} \	324	} \
123	while ((cnt) > newcnt); \	325	while ((cnt) > newcnt); \
124	\	326	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	327	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
126	init (base + cur, newcnt - cur); \	328	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	329	cur = newcnt; \
128	}	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;
129		342
130	/*****************************************************************************/	343	/*****************************************************************************/
131		344
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	345	static void
145	anfds_init (ANFD *base, int count)	346	anfds_init (ANFD *base, int count)
146	{	347	{
147	while (count--)	348	while (count--)
148	{	349	{
149	base->head = 0;	350	base->head = 0;
150	base->wev = base->rev = EV_NONE;	351	base->events = EV_NONE;
		352	base->reify = 0;
		353
151	++base;	354	++base;
152	}	355	}
153	}	356	}
154		357
155	typedef struct	358	void
		359	ev_feed_event (EV_P_ void *w, int revents)
156	{	360	{
157	W w;	361	W w_ = (W)w;
158	int events;
159	} ANPENDING;
160		362
161	static ANPENDING *pendings;	363	if (w_->pending)
162	static int pendingmax, pendingcnt;
163
164	static void
165	event (W w, int events)
166	{
167	if (w->active)
168	{	364	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	365	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		366	return;
173	}	367	}
174	}
175		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
176	static void	375	static void
		376	queue_events (EV_P_ W *events, int eventcnt, int type)
		377	{
		378	int i;
		379
		380	for (i = 0; i < eventcnt; ++i)
		381	ev_feed_event (EV_A_ events [i], type);
		382	}
		383
		384	inline void
177	fd_event (int fd, int events)	385	fd_event (EV_P_ int fd, int revents)
178	{	386	{
179	ANFD *anfd = anfds + fd;	387	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	388	struct ev_io *w;
181		389
182	for (w = anfd->head; w; w = w->next)	390	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
183	{	391	{
184	int ev = w->events & events;	392	int ev = w->events & revents;
185		393
186	if (ev)	394	if (ev)
187	event ((W)w, ev);	395	ev_feed_event (EV_A_ (W)w, ev);
188	}	396	}
189	}	397	}
190		398
		399	void
		400	ev_feed_fd_event (EV_P_ int fd, int revents)
		401	{
		402	fd_event (EV_A_ fd, revents);
		403	}
		404
		405	/*****************************************************************************/
		406
191	static void	407	static void
192	queue_events (W *events, int eventcnt, int type)	408	fd_reify (EV_P)
193	{	409	{
194	int i;	410	int i;
195		411
196	for (i = 0; i < eventcnt; ++i)	412	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	413	{
		414	int fd = fdchanges [i];
		415	ANFD *anfd = anfds + fd;
		416	struct ev_io *w;
		417
		418	int events = 0;
		419
		420	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		421	events |= w->events;
		422
		423	#if EV_SELECT_IS_WINSOCKET
		424	if (events)
		425	{
		426	unsigned long argp;
		427	anfd->handle = _get_osfhandle (fd);
		428	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		429	}
		430	#endif
		431
		432	anfd->reify = 0;
		433
		434	method_modify (EV_A_ fd, anfd->events, events);
		435	anfd->events = events;
		436	}
		437
		438	fdchangecnt = 0;
		439	}
		440
		441	static void
		442	fd_change (EV_P_ int fd)
		443	{
		444	if (anfds [fd].reify)
		445	return;
		446
		447	anfds [fd].reify = 1;
		448
		449	++fdchangecnt;
		450	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		451	fdchanges [fdchangecnt - 1] = fd;
		452	}
		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
198	}	474	}
199		475
200	/* called on EBADF to verify fds */	476	/* called on EBADF to verify fds */
201	static void	477	static void
202	fd_recheck ()	478	fd_ebadf (EV_P)
203	{	479	{
204	int fd;	480	int fd;
205		481
206	for (fd = 0; fd < anfdmax; ++fd)	482	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	483	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	484	if (!fd_valid (fd) == -1 && errno == EBADF)
209	while (anfds [fd].head)	485	fd_kill (EV_A_ fd);
210	evio_stop (anfds [fd].head);	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)
		496	{
		497	fd_kill (EV_A_ fd);
		498	return;
		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	}
211	}	515	}
212		516
213	/*****************************************************************************/	517	/*****************************************************************************/
214		518
215	static struct ev_timer **timers;
216	static int timermax, timercnt;
217
218	static struct ev_periodic **periodics;
219	static int periodicmax, periodiccnt;
220
221	static void	519	static void
222	upheap (WT *timers, int k)	520	upheap (WT *heap, int k)
223	{	521	{
224	WT w = timers [k];	522	WT w = heap [k];
225		523
226	while (k && timers [k >> 1]->at > w->at)	524	while (k && heap [k >> 1]->at > w->at)
227	{	525	{
228	timers [k] = timers [k >> 1];	526	heap [k] = heap [k >> 1];
229	timers [k]->active = k + 1;	527	((W)heap [k])->active = k + 1;
230	k >>= 1;	528	k >>= 1;
231	}	529	}
232		530
233	timers [k] = w;	531	heap [k] = w;
234	timers [k]->active = k + 1;	532	((W)heap [k])->active = k + 1;
235		533
236	}	534	}
237		535
238	static void	536	static void
239	downheap (WT *timers, int N, int k)	537	downheap (WT *heap, int N, int k)
240	{	538	{
241	WT w = timers [k];	539	WT w = heap [k];
242		540
243	while (k < (N >> 1))	541	while (k < (N >> 1))
244	{	542	{
245	int j = k << 1;	543	int j = k << 1;
246		544
247	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	545	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
248	++j;	546	++j;
249		547
250	if (w->at <= timers [j]->at)	548	if (w->at <= heap [j]->at)
251	break;	549	break;
252		550
253	timers [k] = timers [j];	551	heap [k] = heap [j];
254	timers [k]->active = k + 1;	552	((W)heap [k])->active = k + 1;
255	k = j;	553	k = j;
256	}	554	}
257		555
258	timers [k] = w;	556	heap [k] = w;
259	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);
260	}	565	}
261		566
262	/*****************************************************************************/	567	/*****************************************************************************/
263		568
264	typedef struct	569	typedef struct
265	{	570	{
266	struct ev_signal *head;	571	WL head;
267	sig_atomic_t gotsig;	572	sig_atomic_t volatile gotsig;
268	} ANSIG;	573	} ANSIG;
269		574
270	static ANSIG *signals;	575	static ANSIG *signals;
271	static int signalmax;	576	static int signalmax;
272		577
273	static int sigpipe [2];	578	static int sigpipe [2];
274	static sig_atomic_t gotsig;	579	static sig_atomic_t volatile gotsig;
275	static struct ev_io sigev;	580	static struct ev_io sigev;
276		581
277	static void	582	static void
278	signals_init (ANSIG *base, int count)	583	signals_init (ANSIG *base, int count)
279	{	584	{
280	while (count--)	585	while (count--)
281	{	586	{
282	base->head = 0;	587	base->head = 0;
283	base->gotsig = 0;	588	base->gotsig = 0;
		589
284	++base;	590	++base;
285	}	591	}
286	}	592	}
287		593
288	static void	594	static void
289	sighandler (int signum)	595	sighandler (int signum)
290	{	596	{
		597	#if _WIN32
		598	signal (signum, sighandler);
		599	#endif
		600
291	signals [signum - 1].gotsig = 1;	601	signals [signum - 1].gotsig = 1;
292		602
293	if (!gotsig)	603	if (!gotsig)
294	{	604	{
		605	int old_errno = errno;
295	gotsig = 1;	606	gotsig = 1;
296	write (sigpipe [1], &gotsig, 1);	607	write (sigpipe [1], &signum, 1);
		608	errno = old_errno;
297	}	609	}
298	}	610	}
299		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
300	static void	632	static void
301	sigcb (struct ev_io *iow, int revents)	633	sigcb (EV_P_ struct ev_io *iow, int revents)
302	{	634	{
303	struct ev_signal *w;
304	int sig;	635	int signum;
305		636
		637	read (sigpipe [0], &revents, 1);
306	gotsig = 0;	638	gotsig = 0;
307	read (sigpipe [0], &revents, 1);
308		639
309	for (sig = signalmax; sig--; )	640	for (signum = signalmax; signum--; )
310	if (signals [sig].gotsig)	641	if (signals [signum].gotsig)
311	{	642	ev_feed_signal_event (EV_A_ signum + 1);
312	signals [sig].gotsig = 0;
313
314	for (w = signals [sig].head; w; w = w->next)
315	event ((W)w, EV_SIGNAL);
316	}
317	}	643	}
318		644
319	static void	645	inline void
320	siginit (void)	646	fd_intern (int fd)
321	{	647	{
		648	#ifdef _WIN32
		649	int arg = 1;
		650	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		651	#else
322	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	652	fcntl (fd, F_SETFD, FD_CLOEXEC);
323	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
324
325	/* rather than sort out wether we really need nb, set it */
326	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	653	fcntl (fd, F_SETFL, O_NONBLOCK);
327	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	654	#endif
		655	}
328		656
		657	static void
		658	siginit (EV_P)
		659	{
		660	fd_intern (sigpipe [0]);
		661	fd_intern (sigpipe [1]);
		662
329	evio_set (&sigev, sigpipe [0], EV_READ);	663	ev_io_set (&sigev, sigpipe [0], EV_READ);
330	evio_start (&sigev);	664	ev_io_start (EV_A_ &sigev);
		665	ev_unref (EV_A); /* child watcher should not keep loop alive */
331	}	666	}
332		667
333	/*****************************************************************************/	668	/*****************************************************************************/
334		669
335	static struct ev_idle **idles;
336	static int idlemax, idlecnt;
337
338	static struct ev_prepare **prepares;
339	static int preparemax, preparecnt;
340
341	static struct ev_check **checks;
342	static int checkmax, checkcnt;
343
344	/*****************************************************************************/
345
346	static struct ev_child *childs [PID_HASHSIZE];	670	static struct ev_child *childs [PID_HASHSIZE];
		671
		672	#ifndef _WIN32
		673
347	static struct ev_signal childev;	674	static struct ev_signal childev;
348		675
349	#ifndef WCONTINUED	676	#ifndef WCONTINUED
350	# define WCONTINUED 0	677	# define WCONTINUED 0
351	#endif	678	#endif
352		679
353	static void	680	static void
354	childcb (struct ev_signal *sw, int revents)	681	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
355	{	682	{
356	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	{
357	int pid, status;	698	int pid, status;
358		699
359	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	700	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
360	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	701	{
361	if (w->pid == pid || w->pid == -1)	702	/* make sure we are called again until all childs have been reaped */
362	{	703	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
363	w->status = status;	704
364	event ((W)w, EV_CHILD);	705	child_reap (EV_A_ sw, pid, pid, status);
365	}	706	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		707	}
366	}	708	}
		709
		710	#endif
367		711
368	/*****************************************************************************/	712	/*****************************************************************************/
369		713
		714	#if EV_USE_KQUEUE
		715	# include "ev_kqueue.c"
		716	#endif
370	#if HAVE_EPOLL	717	#if EV_USE_EPOLL
371	# include "ev_epoll.c"	718	# include "ev_epoll.c"
372	#endif	719	#endif
		720	#if EV_USE_POLL
		721	# include "ev_poll.c"
		722	#endif
373	#if HAVE_SELECT	723	#if EV_USE_SELECT
374	# include "ev_select.c"	724	# include "ev_select.c"
375	#endif	725	#endif
376		726
377	int ev_init (int flags)	727	int
		728	ev_version_major (void)
378	{	729	{
		730	return EV_VERSION_MAJOR;
		731	}
		732
		733	int
		734	ev_version_minor (void)
		735	{
		736	return EV_VERSION_MINOR;
		737	}
		738
		739	/* return true if we are running with elevated privileges and should ignore env variables */
		740	static int
		741	enable_secure (void)
		742	{
		743	#ifdef _WIN32
		744	return 0;
		745	#else
		746	return getuid () != geteuid ()
		747	|| getgid () != getegid ();
		748	#endif
		749	}
		750
		751	int
		752	ev_method (EV_P)
		753	{
		754	return method;
		755	}
		756
		757	static void
		758	loop_init (EV_P_ int methods)
		759	{
379	if (!ev_method)	760	if (!method)
380	{	761	{
381	#if HAVE_MONOTONIC	762	#if EV_USE_MONOTONIC
382	{	763	{
383	struct timespec ts;	764	struct timespec ts;
384	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	765	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
385	have_monotonic = 1;	766	have_monotonic = 1;
386	}	767	}
387	#endif	768	#endif
388		769
389	ev_now = ev_time ();	770	ev_rt_now = ev_time ();
390	now = get_clock ();	771	mn_now = get_clock ();
		772	now_floor = mn_now;
391	diff = ev_now - now;	773	rtmn_diff = ev_rt_now - mn_now;
392		774
		775	if (methods == EVMETHOD_AUTO)
		776	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		777	methods = atoi (getenv ("LIBEV_METHODS"));
		778	else
		779	methods = EVMETHOD_ANY;
		780
		781	method = 0;
		782	#if EV_USE_KQUEUE
		783	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		784	#endif
		785	#if EV_USE_EPOLL
		786	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		787	#endif
		788	#if EV_USE_POLL
		789	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		790	#endif
		791	#if EV_USE_SELECT
		792	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		793	#endif
		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 (int methods)
		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_ methods);
		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 (int methods)
		899	{
		900	if (sigpipe [0] == sigpipe [1])
393	if (pipe (sigpipe))	901	if (pipe (sigpipe))
394	return 0;	902	return 0;
395		903
396	ev_method = EVMETHOD_NONE;	904	if (!default_loop)
397	#if HAVE_EPOLL	905	{
398	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	906	#if EV_MULTIPLICITY
		907	struct ev_loop *loop = default_loop = &default_loop_struct;
		908	#else
		909	default_loop = 1;
399	#endif	910	#endif
400	#if HAVE_SELECT
401	if (ev_method == EVMETHOD_NONE) select_init (flags);
402	#endif
403		911
		912	loop_init (EV_A_ methods);
		913
404	if (ev_method)	914	if (ev_method (EV_A))
405	{	915	{
406	evw_init (&sigev, sigcb);
407	siginit ();	916	siginit (EV_A);
408		917
		918	#ifndef _WIN32
409	evsignal_init (&childev, childcb, SIGCHLD);	919	ev_signal_init (&childev, childcb, SIGCHLD);
		920	ev_set_priority (&childev, EV_MAXPRI);
410	evsignal_start (&childev);	921	ev_signal_start (EV_A_ &childev);
		922	ev_unref (EV_A); /* child watcher should not keep loop alive */
		923	#endif
411	}	924	}
		925	else
		926	default_loop = 0;
412	}	927	}
413		928
414	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;
415	}	962	}
416		963
417	/*****************************************************************************/	964	/*****************************************************************************/
418		965
419	void ev_prefork (void)
420	{
421	/* nop */
422	}
423
424	void ev_postfork_parent (void)
425	{
426	/* nop */
427	}
428
429	void ev_postfork_child (void)
430	{
431	#if HAVE_EPOLL
432	if (ev_method == EVMETHOD_EPOLL)
433	epoll_postfork_child ();
434	#endif
435
436	evio_stop (&sigev);
437	close (sigpipe [0]);
438	close (sigpipe [1]);
439	pipe (sigpipe);
440	siginit ();
441	}
442
443	/*****************************************************************************/
444
445	static void	966	static int
446	fd_reify (void)	967	any_pending (EV_P)
447	{	968	{
448	int i;	969	int pri;
449		970
450	for (i = 0; i < fdchangecnt; ++i)	971	for (pri = NUMPRI; pri--; )
451	{	972	if (pendingcnt [pri])
452	int fd = fdchanges [i];	973	return 1;
453	ANFD *anfd = anfds + fd;
454	struct ev_io *w;
455		974
456	int wev = 0;	975	return 0;
457
458	for (w = anfd->head; w; w = w->next)
459	wev |= w->events;
460
461	if (anfd->wev != wev)
462	{
463	method_modify (fd, anfd->wev, wev);
464	anfd->wev = wev;
465	}
466	}
467
468	fdchangecnt = 0;
469	}	976	}
470		977
471	static void	978	static void
472	call_pending ()	979	call_pending (EV_P)
473	{	980	{
		981	int pri;
		982
		983	for (pri = NUMPRI; pri--; )
474	while (pendingcnt)	984	while (pendingcnt [pri])
475	{	985	{
476	ANPENDING *p = pendings + --pendingcnt;	986	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
477		987
478	if (p->w)	988	if (p->w)
479	{	989	{
480	p->w->pending = 0;	990	p->w->pending = 0;
481	p->w->cb (p->w, p->events);	991	EV_CB_INVOKE (p->w, p->events);
482	}	992	}
483	}	993	}
484	}	994	}
485		995
486	static void	996	static void
487	timers_reify ()	997	timers_reify (EV_P)
488	{	998	{
489	while (timercnt && timers [0]->at <= now)	999	while (timercnt && ((WT)timers [0])->at <= mn_now)
490	{	1000	{
491	struct ev_timer *w = timers [0];	1001	struct ev_timer *w = timers [0];
492		1002
493	event ((W)w, EV_TIMEOUT);	1003	assert (("inactive timer on timer heap detected", ev_is_active (w)));
494		1004
495	/* first reschedule or stop timer */	1005	/* first reschedule or stop timer */
496	if (w->repeat)	1006	if (w->repeat)
497	{	1007	{
		1008	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1009
498	w->at = now + w->repeat;	1010	((WT)w)->at += w->repeat;
499	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
500	downheap ((WT *)timers, timercnt, 0);	1014	downheap ((WT *)timers, timercnt, 0);
501	}	1015	}
502	else	1016	else
503	evtimer_stop (w); /* nonrepeating: stop timer */	1017	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
504	}
505	}
506		1018
		1019	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1020	}
		1021	}
		1022
		1023	#if EV_PERIODICS
507	static void	1024	static void
508	periodics_reify ()	1025	periodics_reify (EV_P)
509	{	1026	{
510	while (periodiccnt && periodics [0]->at <= ev_now)	1027	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
511	{	1028	{
512	struct ev_periodic *w = periodics [0];	1029	struct ev_periodic *w = periodics [0];
513		1030
		1031	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1032
514	/* first reschedule or stop timer */	1033	/* first reschedule or stop timer */
515	if (w->interval)	1034	if (w->reschedule_cb)
516	{	1035	{
		1036	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1037
		1038	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1039	downheap ((WT *)periodics, periodiccnt, 0);
		1040	}
		1041	else if (w->interval)
		1042	{
517	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1043	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
518	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1044	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
519	downheap ((WT *)periodics, periodiccnt, 0);	1045	downheap ((WT *)periodics, periodiccnt, 0);
520	}	1046	}
521	else	1047	else
522	evperiodic_stop (w); /* nonrepeating: stop timer */	1048	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
523		1049
524	event ((W)w, EV_TIMEOUT);	1050	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
525	}	1051	}
526	}	1052	}
527		1053
528	static void	1054	static void
529	periodics_reschedule (ev_tstamp diff)	1055	periodics_reschedule (EV_P)
530	{	1056	{
531	int i;	1057	int i;
532		1058
533	/* adjust periodics after time jump */	1059	/* adjust periodics after time jump */
534	for (i = 0; i < periodiccnt; ++i)	1060	for (i = 0; i < periodiccnt; ++i)
535	{	1061	{
536	struct ev_periodic *w = periodics [i];	1062	struct ev_periodic *w = periodics [i];
537		1063
		1064	if (w->reschedule_cb)
		1065	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
538	if (w->interval)	1066	else if (w->interval)
		1067	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1068	}
		1069
		1070	/* now rebuild the heap */
		1071	for (i = periodiccnt >> 1; i--; )
		1072	downheap ((WT *)periodics, periodiccnt, i);
		1073	}
		1074	#endif
		1075
		1076	inline int
		1077	time_update_monotonic (EV_P)
		1078	{
		1079	mn_now = get_clock ();
		1080
		1081	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1082	{
		1083	ev_rt_now = rtmn_diff + mn_now;
		1084	return 0;
		1085	}
		1086	else
		1087	{
		1088	now_floor = mn_now;
		1089	ev_rt_now = ev_time ();
		1090	return 1;
		1091	}
		1092	}
		1093
		1094	static void
		1095	time_update (EV_P)
		1096	{
		1097	int i;
		1098
		1099	#if EV_USE_MONOTONIC
		1100	if (expect_true (have_monotonic))
		1101	{
		1102	if (time_update_monotonic (EV_A))
539	{	1103	{
540	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1104	ev_tstamp odiff = rtmn_diff;
541		1105
542	if (fabs (diff) >= 1e-4)	1106	for (i = 4; --i; ) /* loop a few times, before making important decisions */
543	{	1107	{
544	evperiodic_stop (w);	1108	rtmn_diff = ev_rt_now - mn_now;
545	evperiodic_start (w);
546		1109
547	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1110	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1111	return; /* all is well */
		1112
		1113	ev_rt_now = ev_time ();
		1114	mn_now = get_clock ();
		1115	now_floor = mn_now;
548	}	1116	}
		1117
		1118	# if EV_PERIODICS
		1119	periodics_reschedule (EV_A);
		1120	# endif
		1121	/* no timer adjustment, as the monotonic clock doesn't jump */
		1122	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
549	}	1123	}
550	}	1124	}
551	}	1125	else
552		1126	#endif
553	static void	1127	{
554	time_update ()
555	{
556	int i;
557
558	ev_now = ev_time ();	1128	ev_rt_now = ev_time ();
559		1129
560	if (have_monotonic)	1130	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
561	{
562	ev_tstamp odiff = diff;
563
564	for (i = 4; --i; ) /* loop a few times, before making important decisions */
565	{	1131	{
566	now = get_clock ();	1132	#if EV_PERIODICS
567	diff = ev_now - now;
568
569	if (fabs (odiff - diff) < MIN_TIMEJUMP)
570	return; /* all is well */
571
572	ev_now = ev_time ();
573	}
574
575	periodics_reschedule (diff - odiff);
576	/* no timer adjustment, as the monotonic clock doesn't jump */
577	}
578	else
579	{
580	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
581	{
582	periodics_reschedule (ev_now - now);	1133	periodics_reschedule (EV_A);
		1134	#endif
583		1135
584	/* adjust timers. this is easy, as the offset is the same for all */	1136	/* adjust timers. this is easy, as the offset is the same for all */
585	for (i = 0; i < timercnt; ++i)	1137	for (i = 0; i < timercnt; ++i)
586	timers [i]->at += diff;	1138	((WT)timers [i])->at += ev_rt_now - mn_now;
587	}	1139	}
588		1140
589	now = ev_now;	1141	mn_now = ev_rt_now;
590	}	1142	}
591	}	1143	}
592		1144
593	int ev_loop_done;	1145	void
		1146	ev_ref (EV_P)
		1147	{
		1148	++activecnt;
		1149	}
594		1150
		1151	void
		1152	ev_unref (EV_P)
		1153	{
		1154	--activecnt;
		1155	}
		1156
		1157	static int loop_done;
		1158
		1159	void
595	void ev_loop (int flags)	1160	ev_loop (EV_P_ int flags)
596	{	1161	{
597	double block;	1162	double block;
598	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1163	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
599		1164
600	do	1165	do
601	{	1166	{
602	/* queue check watchers (and execute them) */	1167	/* queue check watchers (and execute them) */
603	if (preparecnt)	1168	if (expect_false (preparecnt))
604	{	1169	{
605	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1170	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
606	call_pending ();	1171	call_pending (EV_A);
607	}	1172	}
608		1173
		1174	/* we might have forked, so reify kernel state if necessary */
		1175	if (expect_false (postfork))
		1176	loop_fork (EV_A);
		1177
609	/* update fd-related kernel structures */	1178	/* update fd-related kernel structures */
610	fd_reify ();	1179	fd_reify (EV_A);
611		1180
612	/* calculate blocking time */	1181	/* calculate blocking time */
613		1182
614	/* we only need this for !monotonic clockor timers, but as we basically	1183	/* we only need this for !monotonic clock or timers, but as we basically
615	always have timers, we just calculate it always */	1184	always have timers, we just calculate it always */
		1185	#if EV_USE_MONOTONIC
		1186	if (expect_true (have_monotonic))
		1187	time_update_monotonic (EV_A);
		1188	else
		1189	#endif
		1190	{
616	ev_now = ev_time ();	1191	ev_rt_now = ev_time ();
		1192	mn_now = ev_rt_now;
		1193	}
617		1194
618	if (flags & EVLOOP_NONBLOCK || idlecnt)	1195	if (flags & EVLOOP_NONBLOCK || idlecnt)
619	block = 0.;	1196	block = 0.;
620	else	1197	else
621	{	1198	{
622	block = MAX_BLOCKTIME;	1199	block = MAX_BLOCKTIME;
623		1200
624	if (timercnt)	1201	if (timercnt)
625	{	1202	{
626	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1203	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
627	if (block > to) block = to;	1204	if (block > to) block = to;
628	}	1205	}
629		1206
		1207	#if EV_PERIODICS
630	if (periodiccnt)	1208	if (periodiccnt)
631	{	1209	{
632	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1210	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
633	if (block > to) block = to;	1211	if (block > to) block = to;
634	}	1212	}
		1213	#endif
635		1214
636	if (block < 0.) block = 0.;	1215	if (block < 0.) block = 0.;
637	}	1216	}
638		1217
639	method_poll (block);	1218	method_poll (EV_A_ block);
640		1219
641	/* update ev_now, do magic */	1220	/* update ev_rt_now, do magic */
642	time_update ();	1221	time_update (EV_A);
643		1222
644	/* queue pending timers and reschedule them */	1223	/* queue pending timers and reschedule them */
645	timers_reify (); /* relative timers called last */	1224	timers_reify (EV_A); /* relative timers called last */
		1225	#if EV_PERIODICS
646	periodics_reify (); /* absolute timers called first */	1226	periodics_reify (EV_A); /* absolute timers called first */
		1227	#endif
647		1228
648	/* queue idle watchers unless io or timers are pending */	1229	/* queue idle watchers unless io or timers are pending */
649	if (!pendingcnt)	1230	if (idlecnt && !any_pending (EV_A))
650	queue_events ((W *)idles, idlecnt, EV_IDLE);	1231	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
651		1232
652	/* queue check watchers, to be executed first */	1233	/* queue check watchers, to be executed first */
653	if (checkcnt)	1234	if (checkcnt)
654	queue_events ((W *)checks, checkcnt, EV_CHECK);	1235	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
655		1236
656	call_pending ();	1237	call_pending (EV_A);
657	}	1238	}
658	while (!ev_loop_done);	1239	while (activecnt && !loop_done);
659		1240
660	if (ev_loop_done != 2)	1241	if (loop_done != 2)
661	ev_loop_done = 0;	1242	loop_done = 0;
		1243	}
		1244
		1245	void
		1246	ev_unloop (EV_P_ int how)
		1247	{
		1248	loop_done = how;
662	}	1249	}
663		1250
664	/*****************************************************************************/	1251	/*****************************************************************************/
665		1252
666	static void	1253	inline void
667	wlist_add (WL *head, WL elem)	1254	wlist_add (WL *head, WL elem)
668	{	1255	{
669	elem->next = *head;	1256	elem->next = *head;
670	*head = elem;	1257	*head = elem;
671	}	1258	}
672		1259
673	static void	1260	inline void
674	wlist_del (WL *head, WL elem)	1261	wlist_del (WL *head, WL elem)
675	{	1262	{
676	while (*head)	1263	while (*head)
677	{	1264	{
678	if (*head == elem)	1265	if (*head == elem)
…		…
683		1270
684	head = &(*head)->next;	1271	head = &(*head)->next;
685	}	1272	}
686	}	1273	}
687		1274
688	static void	1275	inline void
689	ev_clear (W w)	1276	ev_clear_pending (EV_P_ W w)
690	{	1277	{
691	if (w->pending)	1278	if (w->pending)
692	{	1279	{
693	pendings [w->pending - 1].w = 0;	1280	pendings [ABSPRI (w)][w->pending - 1].w = 0;
694	w->pending = 0;	1281	w->pending = 0;
695	}	1282	}
696	}	1283	}
697		1284
698	static void	1285	inline void
699	ev_start (W w, int active)	1286	ev_start (EV_P_ W w, int active)
700	{	1287	{
		1288	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1289	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1290
701	w->active = active;	1291	w->active = active;
		1292	ev_ref (EV_A);
702	}	1293	}
703		1294
704	static void	1295	inline void
705	ev_stop (W w)	1296	ev_stop (EV_P_ W w)
706	{	1297	{
		1298	ev_unref (EV_A);
707	w->active = 0;	1299	w->active = 0;
708	}	1300	}
709		1301
710	/*****************************************************************************/	1302	/*****************************************************************************/
711		1303
712	void	1304	void
713	evio_start (struct ev_io *w)	1305	ev_io_start (EV_P_ struct ev_io *w)
714	{	1306	{
		1307	int fd = w->fd;
		1308
715	if (ev_is_active (w))	1309	if (ev_is_active (w))
716	return;	1310	return;
717		1311
718	int fd = w->fd;	1312	assert (("ev_io_start called with negative fd", fd >= 0));
719		1313
720	ev_start ((W)w, 1);	1314	ev_start (EV_A_ (W)w, 1);
721	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1315	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
722	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1316	wlist_add ((WL *)&anfds[fd].head, (WL)w);
723		1317
724	++fdchangecnt;	1318	fd_change (EV_A_ fd);
725	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
726	fdchanges [fdchangecnt - 1] = fd;
727	}	1319	}
728		1320
729	void	1321	void
730	evio_stop (struct ev_io *w)	1322	ev_io_stop (EV_P_ struct ev_io *w)
731	{	1323	{
732	ev_clear ((W)w);	1324	ev_clear_pending (EV_A_ (W)w);
733	if (!ev_is_active (w))	1325	if (!ev_is_active (w))
734	return;	1326	return;
735		1327
		1328	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1329
736	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1330	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
737	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
738		1332
739	++fdchangecnt;	1333	fd_change (EV_A_ w->fd);
740	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
741	fdchanges [fdchangecnt - 1] = w->fd;
742	}	1334	}
743		1335
744	void	1336	void
745	evtimer_start (struct ev_timer *w)	1337	ev_timer_start (EV_P_ struct ev_timer *w)
746	{	1338	{
747	if (ev_is_active (w))	1339	if (ev_is_active (w))
748	return;	1340	return;
749		1341
750	w->at += now;	1342	((WT)w)->at += mn_now;
751		1343
752	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1344	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
753		1345
754	ev_start ((W)w, ++timercnt);	1346	ev_start (EV_A_ (W)w, ++timercnt);
755	array_needsize (timers, timermax, timercnt, );	1347	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
756	timers [timercnt - 1] = w;	1348	timers [timercnt - 1] = w;
757	upheap ((WT *)timers, timercnt - 1);	1349	upheap ((WT *)timers, timercnt - 1);
758	}
759		1350
		1351	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1352	}
		1353
760	void	1354	void
761	evtimer_stop (struct ev_timer *w)	1355	ev_timer_stop (EV_P_ struct ev_timer *w)
762	{	1356	{
763	ev_clear ((W)w);	1357	ev_clear_pending (EV_A_ (W)w);
764	if (!ev_is_active (w))	1358	if (!ev_is_active (w))
765	return;	1359	return;
766		1360
		1361	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1362
767	if (w->active < timercnt--)	1363	if (((W)w)->active < timercnt--)
768	{	1364	{
769	timers [w->active - 1] = timers [timercnt];	1365	timers [((W)w)->active - 1] = timers [timercnt];
770	downheap ((WT *)timers, timercnt, w->active - 1);	1366	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
771	}	1367	}
772		1368
773	w->at = w->repeat;	1369	((WT)w)->at -= mn_now;
774		1370
775	ev_stop ((W)w);	1371	ev_stop (EV_A_ (W)w);
776	}	1372	}
777		1373
778	void	1374	void
779	evtimer_again (struct ev_timer *w)	1375	ev_timer_again (EV_P_ struct ev_timer *w)
780	{	1376	{
781	if (ev_is_active (w))	1377	if (ev_is_active (w))
782	{	1378	{
783	if (w->repeat)	1379	if (w->repeat)
784	{	1380	{
785	w->at = now + w->repeat;	1381	((WT)w)->at = mn_now + w->repeat;
786	downheap ((WT *)timers, timercnt, w->active - 1);	1382	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
787	}	1383	}
788	else	1384	else
789	evtimer_stop (w);	1385	ev_timer_stop (EV_A_ w);
790	}	1386	}
791	else if (w->repeat)	1387	else if (w->repeat)
792	evtimer_start (w);	1388	ev_timer_start (EV_A_ w);
793	}	1389	}
794		1390
		1391	#if EV_PERIODICS
795	void	1392	void
796	evperiodic_start (struct ev_periodic *w)	1393	ev_periodic_start (EV_P_ struct ev_periodic *w)
797	{	1394	{
798	if (ev_is_active (w))	1395	if (ev_is_active (w))
799	return;	1396	return;
800		1397
801	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1398	if (w->reschedule_cb)
802		1399	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1400	else if (w->interval)
		1401	{
		1402	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
803	/* this formula differs from the one in periodic_reify because we do not always round up */	1403	/* this formula differs from the one in periodic_reify because we do not always round up */
804	if (w->interval)
805	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1404	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1405	}
806		1406
807	ev_start ((W)w, ++periodiccnt);	1407	ev_start (EV_A_ (W)w, ++periodiccnt);
808	array_needsize (periodics, periodicmax, periodiccnt, );	1408	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
809	periodics [periodiccnt - 1] = w;	1409	periodics [periodiccnt - 1] = w;
810	upheap ((WT *)periodics, periodiccnt - 1);	1410	upheap ((WT *)periodics, periodiccnt - 1);
811	}
812		1411
		1412	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1413	}
		1414
813	void	1415	void
814	evperiodic_stop (struct ev_periodic *w)	1416	ev_periodic_stop (EV_P_ struct ev_periodic *w)
815	{	1417	{
816	ev_clear ((W)w);	1418	ev_clear_pending (EV_A_ (W)w);
817	if (!ev_is_active (w))	1419	if (!ev_is_active (w))
818	return;	1420	return;
819		1421
		1422	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1423
820	if (w->active < periodiccnt--)	1424	if (((W)w)->active < periodiccnt--)
821	{	1425	{
822	periodics [w->active - 1] = periodics [periodiccnt];	1426	periodics [((W)w)->active - 1] = periodics [periodiccnt];
823	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1427	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
824	}	1428	}
825		1429
826	ev_stop ((W)w);	1430	ev_stop (EV_A_ (W)w);
827	}	1431	}
828		1432
829	void	1433	void
830	evsignal_start (struct ev_signal *w)	1434	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1435	{
		1436	/* TODO: use adjustheap and recalculation */
		1437	ev_periodic_stop (EV_A_ w);
		1438	ev_periodic_start (EV_A_ w);
		1439	}
		1440	#endif
		1441
		1442	void
		1443	ev_idle_start (EV_P_ struct ev_idle *w)
831	{	1444	{
832	if (ev_is_active (w))	1445	if (ev_is_active (w))
833	return;	1446	return;
834		1447
		1448	ev_start (EV_A_ (W)w, ++idlecnt);
		1449	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1450	idles [idlecnt - 1] = w;
		1451	}
		1452
		1453	void
		1454	ev_idle_stop (EV_P_ struct ev_idle *w)
		1455	{
		1456	ev_clear_pending (EV_A_ (W)w);
		1457	if (!ev_is_active (w))
		1458	return;
		1459
		1460	idles [((W)w)->active - 1] = idles [--idlecnt];
		1461	ev_stop (EV_A_ (W)w);
		1462	}
		1463
		1464	void
		1465	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1466	{
		1467	if (ev_is_active (w))
		1468	return;
		1469
		1470	ev_start (EV_A_ (W)w, ++preparecnt);
		1471	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1472	prepares [preparecnt - 1] = w;
		1473	}
		1474
		1475	void
		1476	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1477	{
		1478	ev_clear_pending (EV_A_ (W)w);
		1479	if (!ev_is_active (w))
		1480	return;
		1481
		1482	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1483	ev_stop (EV_A_ (W)w);
		1484	}
		1485
		1486	void
		1487	ev_check_start (EV_P_ struct ev_check *w)
		1488	{
		1489	if (ev_is_active (w))
		1490	return;
		1491
		1492	ev_start (EV_A_ (W)w, ++checkcnt);
		1493	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1494	checks [checkcnt - 1] = w;
		1495	}
		1496
		1497	void
		1498	ev_check_stop (EV_P_ struct ev_check *w)
		1499	{
		1500	ev_clear_pending (EV_A_ (W)w);
		1501	if (!ev_is_active (w))
		1502	return;
		1503
		1504	checks [((W)w)->active - 1] = checks [--checkcnt];
		1505	ev_stop (EV_A_ (W)w);
		1506	}
		1507
		1508	#ifndef SA_RESTART
		1509	# define SA_RESTART 0
		1510	#endif
		1511
		1512	void
		1513	ev_signal_start (EV_P_ struct ev_signal *w)
		1514	{
		1515	#if EV_MULTIPLICITY
		1516	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1517	#endif
		1518	if (ev_is_active (w))
		1519	return;
		1520
		1521	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1522
835	ev_start ((W)w, 1);	1523	ev_start (EV_A_ (W)w, 1);
836	array_needsize (signals, signalmax, w->signum, signals_init);	1524	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
837	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1525	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
838		1526
839	if (!w->next)	1527	if (!((WL)w)->next)
840	{	1528	{
		1529	#if _WIN32
		1530	signal (w->signum, sighandler);
		1531	#else
841	struct sigaction sa;	1532	struct sigaction sa;
842	sa.sa_handler = sighandler;	1533	sa.sa_handler = sighandler;
843	sigfillset (&sa.sa_mask);	1534	sigfillset (&sa.sa_mask);
844	sa.sa_flags = 0;	1535	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
845	sigaction (w->signum, &sa, 0);	1536	sigaction (w->signum, &sa, 0);
		1537	#endif
846	}	1538	}
847	}	1539	}
848		1540
849	void	1541	void
850	evsignal_stop (struct ev_signal *w)	1542	ev_signal_stop (EV_P_ struct ev_signal *w)
851	{	1543	{
852	ev_clear ((W)w);	1544	ev_clear_pending (EV_A_ (W)w);
853	if (!ev_is_active (w))	1545	if (!ev_is_active (w))
854	return;	1546	return;
855		1547
856	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1548	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
857	ev_stop ((W)w);	1549	ev_stop (EV_A_ (W)w);
858		1550
859	if (!signals [w->signum - 1].head)	1551	if (!signals [w->signum - 1].head)
860	signal (w->signum, SIG_DFL);	1552	signal (w->signum, SIG_DFL);
861	}	1553	}
862		1554
863	void evidle_start (struct ev_idle *w)	1555	void
		1556	ev_child_start (EV_P_ struct ev_child *w)
864	{	1557	{
		1558	#if EV_MULTIPLICITY
		1559	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1560	#endif
865	if (ev_is_active (w))	1561	if (ev_is_active (w))
866	return;	1562	return;
867		1563
868	ev_start ((W)w, ++idlecnt);
869	array_needsize (idles, idlemax, idlecnt, );
870	idles [idlecnt - 1] = w;
871	}
872
873	void evidle_stop (struct ev_idle *w)
874	{
875	ev_clear ((W)w);
876	if (ev_is_active (w))
877	return;
878
879	idles [w->active - 1] = idles [--idlecnt];
880	ev_stop ((W)w);
881	}
882
883	void evprepare_start (struct ev_prepare *w)
884	{
885	if (ev_is_active (w))
886	return;
887
888	ev_start ((W)w, ++preparecnt);
889	array_needsize (prepares, preparemax, preparecnt, );
890	prepares [preparecnt - 1] = w;
891	}
892
893	void evprepare_stop (struct ev_prepare *w)
894	{
895	ev_clear ((W)w);
896	if (ev_is_active (w))
897	return;
898
899	prepares [w->active - 1] = prepares [--preparecnt];
900	ev_stop ((W)w);
901	}
902
903	void evcheck_start (struct ev_check *w)
904	{
905	if (ev_is_active (w))
906	return;
907
908	ev_start ((W)w, ++checkcnt);
909	array_needsize (checks, checkmax, checkcnt, );
910	checks [checkcnt - 1] = w;
911	}
912
913	void evcheck_stop (struct ev_check *w)
914	{
915	ev_clear ((W)w);
916	if (ev_is_active (w))
917	return;
918
919	checks [w->active - 1] = checks [--checkcnt];
920	ev_stop ((W)w);
921	}
922
923	void evchild_start (struct ev_child *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, 1);	1564	ev_start (EV_A_ (W)w, 1);
929	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1565	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	}	1566	}
931		1567
		1568	void
932	void evchild_stop (struct ev_child *w)	1569	ev_child_stop (EV_P_ struct ev_child *w)
933	{	1570	{
934	ev_clear ((W)w);	1571	ev_clear_pending (EV_A_ (W)w);
935	if (ev_is_active (w))	1572	if (!ev_is_active (w))
936	return;	1573	return;
937		1574
938	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1575	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
939	ev_stop ((W)w);	1576	ev_stop (EV_A_ (W)w);
940	}	1577	}
941		1578
942	/*****************************************************************************/	1579	/*****************************************************************************/
943		1580
944	struct ev_once	1581	struct ev_once
…		…
948	void (*cb)(int revents, void *arg);	1585	void (*cb)(int revents, void *arg);
949	void *arg;	1586	void *arg;
950	};	1587	};
951		1588
952	static void	1589	static void
953	once_cb (struct ev_once *once, int revents)	1590	once_cb (EV_P_ struct ev_once *once, int revents)
954	{	1591	{
955	void (*cb)(int revents, void *arg) = once->cb;	1592	void (*cb)(int revents, void *arg) = once->cb;
956	void *arg = once->arg;	1593	void *arg = once->arg;
957		1594
958	evio_stop (&once->io);	1595	ev_io_stop (EV_A_ &once->io);
959	evtimer_stop (&once->to);	1596	ev_timer_stop (EV_A_ &once->to);
960	free (once);	1597	ev_free (once);
961		1598
962	cb (revents, arg);	1599	cb (revents, arg);
963	}	1600	}
964		1601
965	static void	1602	static void
966	once_cb_io (struct ev_io *w, int revents)	1603	once_cb_io (EV_P_ struct ev_io *w, int revents)
967	{	1604	{
968	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1605	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
969	}	1606	}
970		1607
971	static void	1608	static void
972	once_cb_to (struct ev_timer *w, int revents)	1609	once_cb_to (EV_P_ struct ev_timer *w, int revents)
973	{	1610	{
974	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1611	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
975	}	1612	}
976		1613
977	void	1614	void
978	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1615	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
979	{	1616	{
980	struct ev_once *once = malloc (sizeof (struct ev_once));	1617	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
981		1618
982	if (!once)	1619	if (!once)
983	cb (EV_ERROR, arg);	1620	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
984	else	1621	else
985	{	1622	{
986	once->cb = cb;	1623	once->cb = cb;
987	once->arg = arg;	1624	once->arg = arg;
988		1625
989	evw_init (&once->io, once_cb_io);	1626	ev_init (&once->io, once_cb_io);
990
991	if (fd >= 0)	1627	if (fd >= 0)
992	{	1628	{
993	evio_set (&once->io, fd, events);	1629	ev_io_set (&once->io, fd, events);
994	evio_start (&once->io);	1630	ev_io_start (EV_A_ &once->io);
995	}	1631	}
996		1632
997	evw_init (&once->to, once_cb_to);	1633	ev_init (&once->to, once_cb_to);
998
999	if (timeout >= 0.)	1634	if (timeout >= 0.)
1000	{	1635	{
1001	evtimer_set (&once->to, timeout, 0.);	1636	ev_timer_set (&once->to, timeout, 0.);
1002	evtimer_start (&once->to);	1637	ev_timer_start (EV_A_ &once->to);
1003	}	1638	}
1004	}	1639	}
1005	}	1640	}
1006		1641
1007	/*****************************************************************************/	1642	#ifdef __cplusplus
1008
1009	#if 0
1010
1011	struct ev_io wio;
1012
1013	static void
1014	sin_cb (struct ev_io *w, int revents)
1015	{
1016	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1017	}	1643	}
1018
1019	static void
1020	ocb (struct ev_timer *w, int revents)
1021	{
1022	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1023	evtimer_stop (w);
1024	evtimer_start (w);
1025	}
1026
1027	static void
1028	scb (struct ev_signal *w, int revents)
1029	{
1030	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1031	evio_stop (&wio);
1032	evio_start (&wio);
1033	}
1034
1035	static void
1036	gcb (struct ev_signal *w, int revents)
1037	{
1038	fprintf (stderr, "generic %x\n", revents);
1039
1040	}
1041
1042	int main (void)
1043	{
1044	ev_init (0);
1045
1046	evio_init (&wio, sin_cb, 0, EV_READ);
1047	evio_start (&wio);
1048
1049	struct ev_timer t[10000];
1050
1051	#if 0
1052	int i;
1053	for (i = 0; i < 10000; ++i)
1054	{
1055	struct ev_timer *w = t + i;
1056	evw_init (w, ocb, i);
1057	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1058	evtimer_start (w);
1059	if (drand48 () < 0.5)
1060	evtimer_stop (w);
1061	}
1062	#endif	1644	#endif
1063		1645
1064	struct ev_timer t1;
1065	evtimer_init (&t1, ocb, 5, 10);
1066	evtimer_start (&t1);
1067
1068	struct ev_signal sig;
1069	evsignal_init (&sig, scb, SIGQUIT);
1070	evsignal_start (&sig);
1071
1072	struct ev_check cw;
1073	evcheck_init (&cw, gcb);
1074	evcheck_start (&cw);
1075
1076	struct ev_idle iw;
1077	evidle_init (&iw, gcb);
1078	evidle_start (&iw);
1079
1080	ev_loop (0);
1081
1082	return 0;
1083	}
1084
1085	#endif
1086
1087
1088
1089

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