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Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs.
Revision 1.114 by root, Mon Nov 12 20:03:39 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 EMPTY0 /* required for microsofts broken pseudo-c compiler */
		173	#define EMPTY2(a,b) /* used to suppress some warnings */
69		174
70	typedef struct ev_watcher *W;	175	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	176	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	177	typedef struct ev_watcher_time *WT;
73		178
74	static ev_tstamp now, diff; /* monotonic clock */	179	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		180
		181	#ifdef _WIN32
		182	# include "ev_win32.c"
		183	#endif
		184
		185	/*****************************************************************************/
		186
		187	static void (*syserr_cb)(const char *msg);
		188
		189	void ev_set_syserr_cb (void (*cb)(const char *msg))
		190	{
		191	syserr_cb = cb;
		192	}
		193
		194	static void
		195	syserr (const char *msg)
		196	{
		197	if (!msg)
		198	msg = "(libev) system error";
		199
		200	if (syserr_cb)
		201	syserr_cb (msg);
		202	else
		203	{
		204	perror (msg);
		205	abort ();
		206	}
		207	}
		208
		209	static void *(*alloc)(void *ptr, long size);
		210
		211	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		212	{
		213	alloc = cb;
		214	}
		215
		216	static void *
		217	ev_realloc (void *ptr, long size)
		218	{
		219	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		220
		221	if (!ptr && size)
		222	{
		223	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		224	abort ();
		225	}
		226
		227	return ptr;
		228	}
		229
		230	#define ev_malloc(size) ev_realloc (0, (size))
		231	#define ev_free(ptr) ev_realloc ((ptr), 0)
		232
		233	/*****************************************************************************/
		234
		235	typedef struct
		236	{
		237	WL head;
		238	unsigned char events;
		239	unsigned char reify;
		240	#if EV_SELECT_IS_WINSOCKET
		241	SOCKET handle;
		242	#endif
		243	} ANFD;
		244
		245	typedef struct
		246	{
		247	W w;
		248	int events;
		249	} ANPENDING;
		250
		251	#if EV_MULTIPLICITY
		252
		253	struct ev_loop
		254	{
		255	ev_tstamp ev_rt_now;
		256	#define ev_rt_now ((loop)->ev_rt_now)
		257	#define VAR(name,decl) decl;
		258	#include "ev_vars.h"
		259	#undef VAR
		260	};
		261	#include "ev_wrap.h"
		262
		263	struct ev_loop default_loop_struct;
		264	static struct ev_loop *default_loop;
		265
		266	#else
		267
75	ev_tstamp ev_now;	268	ev_tstamp ev_rt_now;
76	int ev_method;	269	#define VAR(name,decl) static decl;
		270	#include "ev_vars.h"
		271	#undef VAR
77		272
78	static int have_monotonic; /* runtime */	273	static int default_loop;
79		274
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	275	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		276
84	/*****************************************************************************/	277	/*****************************************************************************/
85		278
86	ev_tstamp	279	ev_tstamp
87	ev_time (void)	280	ev_time (void)
88	{	281	{
89	#if HAVE_REALTIME	282	#if EV_USE_REALTIME
90	struct timespec ts;	283	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	284	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	285	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	286	#else
94	struct timeval tv;	287	struct timeval tv;
95	gettimeofday (&tv, 0);	288	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	289	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	290	#endif
98	}	291	}
99		292
100	static ev_tstamp	293	inline ev_tstamp
101	get_clock (void)	294	get_clock (void)
102	{	295	{
103	#if HAVE_MONOTONIC	296	#if EV_USE_MONOTONIC
104	if (have_monotonic)	297	if (expect_true (have_monotonic))
105	{	298	{
106	struct timespec ts;	299	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	300	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	301	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	302	}
110	#endif	303	#endif
111		304
112	return ev_time ();	305	return ev_time ();
113	}	306	}
114		307
		308	#if EV_MULTIPLICITY
		309	ev_tstamp
		310	ev_now (EV_P)
		311	{
		312	return ev_rt_now;
		313	}
		314	#endif
		315
		316	#define array_roundsize(type,n) (((n) | 4) & ~3)
		317
115	#define array_needsize(base,cur,cnt,init) \	318	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	319	if (expect_false ((cnt) > cur)) \
117	{ \	320	{ \
118	int newcnt = cur; \	321	int newcnt = cur; \
119	do \	322	do \
120	{ \	323	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	324	newcnt = array_roundsize (type, newcnt << 1); \
122	} \	325	} \
123	while ((cnt) > newcnt); \	326	while ((cnt) > newcnt); \
124	\	327	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	328	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
126	init (base + cur, newcnt - cur); \	329	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	330	cur = newcnt; \
128	}	331	}
		332
		333	#define array_slim(type,stem) \
		334	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		335	{ \
		336	stem ## max = array_roundsize (stem ## cnt >> 1); \
		337	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		338	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		339	}
		340
		341	#define array_free(stem, idx) \
		342	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
129		343
130	/*****************************************************************************/	344	/*****************************************************************************/
131
132	typedef struct
133	{
134	struct ev_io *head;
135	int events;
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140		345
141	static void	346	static void
142	anfds_init (ANFD *base, int count)	347	anfds_init (ANFD *base, int count)
143	{	348	{
144	while (count--)	349	while (count--)
145	{	350	{
146	base->head = 0;	351	base->head = 0;
147	base->events = EV_NONE;	352	base->events = EV_NONE;
		353	base->reify = 0;
		354
148	++base;	355	++base;
149	}	356	}
150	}	357	}
151		358
152	typedef struct	359	void
		360	ev_feed_event (EV_P_ void *w, int revents)
153	{	361	{
154	W w;	362	W w_ = (W)w;
155	int events;
156	} ANPENDING;
157		363
158	static ANPENDING *pendings;	364	if (w_->pending)
159	static int pendingmax, pendingcnt;
160
161	static void
162	event (W w, int events)
163	{
164	if (w->active)
165	{	365	{
166	w->pending = ++pendingcnt;
167	array_needsize (pendings, pendingmax, pendingcnt, );
168	pendings [pendingcnt - 1].w = w;
169	pendings [pendingcnt - 1].events = events;	366	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		367	return;
170	}	368	}
171	}
172		369
		370	w_->pending = ++pendingcnt [ABSPRI (w_)];
		371	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		372	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		373	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		374	}
		375
173	static void	376	static void
174	queue_events (W *events, int eventcnt, int type)	377	queue_events (EV_P_ W *events, int eventcnt, int type)
175	{	378	{
176	int i;	379	int i;
177		380
178	for (i = 0; i < eventcnt; ++i)	381	for (i = 0; i < eventcnt; ++i)
179	event (events [i], type);	382	ev_feed_event (EV_A_ events [i], type);
180	}	383	}
181		384
182	static void	385	inline void
183	fd_event (int fd, int events)	386	fd_event (EV_P_ int fd, int revents)
184	{	387	{
185	ANFD *anfd = anfds + fd;	388	ANFD *anfd = anfds + fd;
186	struct ev_io *w;	389	struct ev_io *w;
187		390
188	for (w = anfd->head; w; w = w->next)	391	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
189	{	392	{
190	int ev = w->events & events;	393	int ev = w->events & revents;
191		394
192	if (ev)	395	if (ev)
193	event ((W)w, ev);	396	ev_feed_event (EV_A_ (W)w, ev);
194	}	397	}
		398	}
		399
		400	void
		401	ev_feed_fd_event (EV_P_ int fd, int revents)
		402	{
		403	fd_event (EV_A_ fd, revents);
195	}	404	}
196		405
197	/*****************************************************************************/	406	/*****************************************************************************/
198		407
199	static int *fdchanges;
200	static int fdchangemax, fdchangecnt;
201
202	static void	408	static void
203	fd_reify (void)	409	fd_reify (EV_P)
204	{	410	{
205	int i;	411	int i;
206		412
207	for (i = 0; i < fdchangecnt; ++i)	413	for (i = 0; i < fdchangecnt; ++i)
208	{	414	{
…		…
210	ANFD *anfd = anfds + fd;	416	ANFD *anfd = anfds + fd;
211	struct ev_io *w;	417	struct ev_io *w;
212		418
213	int events = 0;	419	int events = 0;
214		420
215	for (w = anfd->head; w; w = w->next)	421	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
216	events |= w->events;	422	events |= w->events;
217		423
218	anfd->events &= ~EV_REIFY;	424	#if EV_SELECT_IS_WINSOCKET
219		425	if (events)
220	if (anfd->events != events)
221	{	426	{
222	method_modify (fd, anfd->events, events);	427	unsigned long argp;
223	anfd->events = events;	428	anfd->handle = _get_osfhandle (fd);
		429	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
224	}	430	}
		431	#endif
		432
		433	anfd->reify = 0;
		434
		435	method_modify (EV_A_ fd, anfd->events, events);
		436	anfd->events = events;
225	}	437	}
226		438
227	fdchangecnt = 0;	439	fdchangecnt = 0;
228	}	440	}
229		441
230	static void	442	static void
231	fd_change (int fd)	443	fd_change (EV_P_ int fd)
232	{	444	{
233	if (anfds [fd].events & EV_REIFY)	445	if (anfds [fd].reify)
234	return;	446	return;
235		447
236	anfds [fd].events |= EV_REIFY;	448	anfds [fd].reify = 1;
237		449
238	++fdchangecnt;	450	++fdchangecnt;
239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	451	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
240	fdchanges [fdchangecnt - 1] = fd;	452	fdchanges [fdchangecnt - 1] = fd;
241	}	453	}
242		454
		455	static void
		456	fd_kill (EV_P_ int fd)
		457	{
		458	struct ev_io *w;
		459
		460	while ((w = (struct ev_io *)anfds [fd].head))
		461	{
		462	ev_io_stop (EV_A_ w);
		463	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		464	}
		465	}
		466
		467	static int
		468	fd_valid (int fd)
		469	{
		470	#ifdef _WIN32
		471	return _get_osfhandle (fd) != -1;
		472	#else
		473	return fcntl (fd, F_GETFD) != -1;
		474	#endif
		475	}
		476
243	/* called on EBADF to verify fds */	477	/* called on EBADF to verify fds */
244	static void	478	static void
245	fd_recheck (void)	479	fd_ebadf (EV_P)
246	{	480	{
247	int fd;	481	int fd;
248		482
249	for (fd = 0; fd < anfdmax; ++fd)	483	for (fd = 0; fd < anfdmax; ++fd)
250	if (anfds [fd].events)	484	if (anfds [fd].events)
251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	485	if (!fd_valid (fd) == -1 && errno == EBADF)
252	while (anfds [fd].head)	486	fd_kill (EV_A_ fd);
		487	}
		488
		489	/* called on ENOMEM in select/poll to kill some fds and retry */
		490	static void
		491	fd_enomem (EV_P)
		492	{
		493	int fd;
		494
		495	for (fd = anfdmax; fd--; )
		496	if (anfds [fd].events)
253	{	497	{
254	event ((W)anfds [fd].head, EV_ERROR);	498	fd_kill (EV_A_ fd);
255	ev_io_stop (anfds [fd].head);	499	return;
256	}	500	}
		501	}
		502
		503	/* usually called after fork if method needs to re-arm all fds from scratch */
		504	static void
		505	fd_rearm_all (EV_P)
		506	{
		507	int fd;
		508
		509	/* this should be highly optimised to not do anything but set a flag */
		510	for (fd = 0; fd < anfdmax; ++fd)
		511	if (anfds [fd].events)
		512	{
		513	anfds [fd].events = 0;
		514	fd_change (EV_A_ fd);
		515	}
257	}	516	}
258		517
259	/*****************************************************************************/	518	/*****************************************************************************/
260		519
261	static struct ev_timer **timers;
262	static int timermax, timercnt;
263
264	static struct ev_periodic **periodics;
265	static int periodicmax, periodiccnt;
266
267	static void	520	static void
268	upheap (WT *timers, int k)	521	upheap (WT *heap, int k)
269	{	522	{
270	WT w = timers [k];	523	WT w = heap [k];
271		524
272	while (k && timers [k >> 1]->at > w->at)	525	while (k && heap [k >> 1]->at > w->at)
273	{	526	{
274	timers [k] = timers [k >> 1];	527	heap [k] = heap [k >> 1];
275	timers [k]->active = k + 1;	528	((W)heap [k])->active = k + 1;
276	k >>= 1;	529	k >>= 1;
277	}	530	}
278		531
279	timers [k] = w;	532	heap [k] = w;
280	timers [k]->active = k + 1;	533	((W)heap [k])->active = k + 1;
281		534
282	}	535	}
283		536
284	static void	537	static void
285	downheap (WT *timers, int N, int k)	538	downheap (WT *heap, int N, int k)
286	{	539	{
287	WT w = timers [k];	540	WT w = heap [k];
288		541
289	while (k < (N >> 1))	542	while (k < (N >> 1))
290	{	543	{
291	int j = k << 1;	544	int j = k << 1;
292		545
293	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	546	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
294	++j;	547	++j;
295		548
296	if (w->at <= timers [j]->at)	549	if (w->at <= heap [j]->at)
297	break;	550	break;
298		551
299	timers [k] = timers [j];	552	heap [k] = heap [j];
300	timers [k]->active = k + 1;	553	((W)heap [k])->active = k + 1;
301	k = j;	554	k = j;
302	}	555	}
303		556
304	timers [k] = w;	557	heap [k] = w;
305	timers [k]->active = k + 1;	558	((W)heap [k])->active = k + 1;
		559	}
		560
		561	inline void
		562	adjustheap (WT *heap, int N, int k)
		563	{
		564	upheap (heap, k);
		565	downheap (heap, N, k);
306	}	566	}
307		567
308	/*****************************************************************************/	568	/*****************************************************************************/
309		569
310	typedef struct	570	typedef struct
311	{	571	{
312	struct ev_signal *head;	572	WL head;
313	sig_atomic_t gotsig;	573	sig_atomic_t volatile gotsig;
314	} ANSIG;	574	} ANSIG;
315		575
316	static ANSIG *signals;	576	static ANSIG *signals;
317	static int signalmax;	577	static int signalmax;
318		578
319	static int sigpipe [2];	579	static int sigpipe [2];
320	static sig_atomic_t gotsig;	580	static sig_atomic_t volatile gotsig;
321	static struct ev_io sigev;	581	static struct ev_io sigev;
322		582
323	static void	583	static void
324	signals_init (ANSIG *base, int count)	584	signals_init (ANSIG *base, int count)
325	{	585	{
326	while (count--)	586	while (count--)
327	{	587	{
328	base->head = 0;	588	base->head = 0;
329	base->gotsig = 0;	589	base->gotsig = 0;
		590
330	++base;	591	++base;
331	}	592	}
332	}	593	}
333		594
334	static void	595	static void
335	sighandler (int signum)	596	sighandler (int signum)
336	{	597	{
		598	#if _WIN32
		599	signal (signum, sighandler);
		600	#endif
		601
337	signals [signum - 1].gotsig = 1;	602	signals [signum - 1].gotsig = 1;
338		603
339	if (!gotsig)	604	if (!gotsig)
340	{	605	{
		606	int old_errno = errno;
341	gotsig = 1;	607	gotsig = 1;
342	write (sigpipe [1], &gotsig, 1);	608	write (sigpipe [1], &signum, 1);
		609	errno = old_errno;
343	}	610	}
344	}	611	}
345		612
		613	void
		614	ev_feed_signal_event (EV_P_ int signum)
		615	{
		616	WL w;
		617
		618	#if EV_MULTIPLICITY
		619	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		620	#endif
		621
		622	--signum;
		623
		624	if (signum < 0 || signum >= signalmax)
		625	return;
		626
		627	signals [signum].gotsig = 0;
		628
		629	for (w = signals [signum].head; w; w = w->next)
		630	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		631	}
		632
346	static void	633	static void
347	sigcb (struct ev_io *iow, int revents)	634	sigcb (EV_P_ struct ev_io *iow, int revents)
348	{	635	{
349	struct ev_signal *w;
350	int sig;	636	int signum;
351		637
		638	read (sigpipe [0], &revents, 1);
352	gotsig = 0;	639	gotsig = 0;
353	read (sigpipe [0], &revents, 1);
354		640
355	for (sig = signalmax; sig--; )	641	for (signum = signalmax; signum--; )
356	if (signals [sig].gotsig)	642	if (signals [signum].gotsig)
357	{	643	ev_feed_signal_event (EV_A_ signum + 1);
358	signals [sig].gotsig = 0;
359
360	for (w = signals [sig].head; w; w = w->next)
361	event ((W)w, EV_SIGNAL);
362	}
363	}	644	}
364		645
365	static void	646	inline void
366	siginit (void)	647	fd_intern (int fd)
367	{	648	{
		649	#ifdef _WIN32
		650	int arg = 1;
		651	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		652	#else
368	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	653	fcntl (fd, F_SETFD, FD_CLOEXEC);
369	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370
371	/* rather than sort out wether we really need nb, set it */
372	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	654	fcntl (fd, F_SETFL, O_NONBLOCK);
373	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	655	#endif
		656	}
		657
		658	static void
		659	siginit (EV_P)
		660	{
		661	fd_intern (sigpipe [0]);
		662	fd_intern (sigpipe [1]);
374		663
375	ev_io_set (&sigev, sigpipe [0], EV_READ);	664	ev_io_set (&sigev, sigpipe [0], EV_READ);
376	ev_io_start (&sigev);	665	ev_io_start (EV_A_ &sigev);
		666	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	}	667	}
378		668
379	/*****************************************************************************/	669	/*****************************************************************************/
380		670
381	static struct ev_idle **idles;
382	static int idlemax, idlecnt;
383
384	static struct ev_prepare **prepares;
385	static int preparemax, preparecnt;
386
387	static struct ev_check **checks;
388	static int checkmax, checkcnt;
389
390	/*****************************************************************************/
391
392	static struct ev_child *childs [PID_HASHSIZE];	671	static struct ev_child *childs [PID_HASHSIZE];
		672
		673	#ifndef _WIN32
		674
393	static struct ev_signal childev;	675	static struct ev_signal childev;
394		676
395	#ifndef WCONTINUED	677	#ifndef WCONTINUED
396	# define WCONTINUED 0	678	# define WCONTINUED 0
397	#endif	679	#endif
398		680
399	static void	681	static void
400	childcb (struct ev_signal *sw, int revents)	682	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
401	{	683	{
402	struct ev_child *w;	684	struct ev_child *w;
		685
		686	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		687	if (w->pid == pid || !w->pid)
		688	{
		689	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		690	w->rpid = pid;
		691	w->rstatus = status;
		692	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		693	}
		694	}
		695
		696	static void
		697	childcb (EV_P_ struct ev_signal *sw, int revents)
		698	{
403	int pid, status;	699	int pid, status;
404		700
405	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	701	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	702	{
407	if (w->pid == pid || w->pid == -1)	703	/* make sure we are called again until all childs have been reaped */
408	{	704	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
409	w->status = status;	705
410	event ((W)w, EV_CHILD);	706	child_reap (EV_A_ sw, pid, pid, status);
411	}	707	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		708	}
412	}	709	}
		710
		711	#endif
413		712
414	/*****************************************************************************/	713	/*****************************************************************************/
415		714
		715	#if EV_USE_KQUEUE
		716	# include "ev_kqueue.c"
		717	#endif
416	#if HAVE_EPOLL	718	#if EV_USE_EPOLL
417	# include "ev_epoll.c"	719	# include "ev_epoll.c"
418	#endif	720	#endif
		721	#if EV_USE_POLL
		722	# include "ev_poll.c"
		723	#endif
419	#if HAVE_SELECT	724	#if EV_USE_SELECT
420	# include "ev_select.c"	725	# include "ev_select.c"
421	#endif	726	#endif
422		727
423	int	728	int
424	ev_version_major (void)	729	ev_version_major (void)
…		…
430	ev_version_minor (void)	735	ev_version_minor (void)
431	{	736	{
432	return EV_VERSION_MINOR;	737	return EV_VERSION_MINOR;
433	}	738	}
434		739
435	int ev_init (int flags)	740	/* return true if we are running with elevated privileges and should ignore env variables */
		741	static int
		742	enable_secure (void)
436	{	743	{
		744	#ifdef _WIN32
		745	return 0;
		746	#else
		747	return getuid () != geteuid ()
		748	|| getgid () != getegid ();
		749	#endif
		750	}
		751
		752	unsigned int
		753	ev_method (EV_P)
		754	{
		755	return method;
		756	}
		757
		758	static void
		759	loop_init (EV_P_ unsigned int flags)
		760	{
437	if (!ev_method)	761	if (!method)
438	{	762	{
439	#if HAVE_MONOTONIC	763	#if EV_USE_MONOTONIC
440	{	764	{
441	struct timespec ts;	765	struct timespec ts;
442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	766	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443	have_monotonic = 1;	767	have_monotonic = 1;
444	}	768	}
445	#endif	769	#endif
446		770
447	ev_now = ev_time ();	771	ev_rt_now = ev_time ();
448	now = get_clock ();	772	mn_now = get_clock ();
		773	now_floor = mn_now;
449	diff = ev_now - now;	774	rtmn_diff = ev_rt_now - mn_now;
450		775
		776	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
		777	flags = atoi (getenv ("LIBEV_FLAGS"));
		778
		779	if (!(flags & 0x0000ffff))
		780	flags |= 0x0000ffff;
		781
		782	method = 0;
		783	#if EV_USE_KQUEUE
		784	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		785	#endif
		786	#if EV_USE_EPOLL
		787	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
		788	#endif
		789	#if EV_USE_POLL
		790	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
		791	#endif
		792	#if EV_USE_SELECT
		793	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
		794	#endif
		795
		796	ev_init (&sigev, sigcb);
		797	ev_set_priority (&sigev, EV_MAXPRI);
		798	}
		799	}
		800
		801	void
		802	loop_destroy (EV_P)
		803	{
		804	int i;
		805
		806	#if EV_USE_KQUEUE
		807	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		808	#endif
		809	#if EV_USE_EPOLL
		810	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		811	#endif
		812	#if EV_USE_POLL
		813	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		814	#endif
		815	#if EV_USE_SELECT
		816	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		817	#endif
		818
		819	for (i = NUMPRI; i--; )
		820	array_free (pending, [i]);
		821
		822	/* have to use the microsoft-never-gets-it-right macro */
		823	array_free (fdchange, EMPTY0);
		824	array_free (timer, EMPTY0);
		825	#if EV_PERIODICS
		826	array_free (periodic, EMPTY0);
		827	#endif
		828	array_free (idle, EMPTY0);
		829	array_free (prepare, EMPTY0);
		830	array_free (check, EMPTY0);
		831
		832	method = 0;
		833	}
		834
		835	static void
		836	loop_fork (EV_P)
		837	{
		838	#if EV_USE_EPOLL
		839	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		840	#endif
		841	#if EV_USE_KQUEUE
		842	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		843	#endif
		844
		845	if (ev_is_active (&sigev))
		846	{
		847	/* default loop */
		848
		849	ev_ref (EV_A);
		850	ev_io_stop (EV_A_ &sigev);
		851	close (sigpipe [0]);
		852	close (sigpipe [1]);
		853
		854	while (pipe (sigpipe))
		855	syserr ("(libev) error creating pipe");
		856
		857	siginit (EV_A);
		858	}
		859
		860	postfork = 0;
		861	}
		862
		863	#if EV_MULTIPLICITY
		864	struct ev_loop *
		865	ev_loop_new (unsigned int flags)
		866	{
		867	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		868
		869	memset (loop, 0, sizeof (struct ev_loop));
		870
		871	loop_init (EV_A_ flags);
		872
		873	if (ev_method (EV_A))
		874	return loop;
		875
		876	return 0;
		877	}
		878
		879	void
		880	ev_loop_destroy (EV_P)
		881	{
		882	loop_destroy (EV_A);
		883	ev_free (loop);
		884	}
		885
		886	void
		887	ev_loop_fork (EV_P)
		888	{
		889	postfork = 1;
		890	}
		891
		892	#endif
		893
		894	#if EV_MULTIPLICITY
		895	struct ev_loop *
		896	#else
		897	int
		898	#endif
		899	ev_default_loop (unsigned int flags)
		900	{
		901	if (sigpipe [0] == sigpipe [1])
451	if (pipe (sigpipe))	902	if (pipe (sigpipe))
452	return 0;	903	return 0;
453		904
454	ev_method = EVMETHOD_NONE;	905	if (!default_loop)
455	#if HAVE_EPOLL	906	{
456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	907	#if EV_MULTIPLICITY
		908	struct ev_loop *loop = default_loop = &default_loop_struct;
		909	#else
		910	default_loop = 1;
457	#endif	911	#endif
458	#if HAVE_SELECT
459	if (ev_method == EVMETHOD_NONE) select_init (flags);
460	#endif
461		912
		913	loop_init (EV_A_ flags);
		914
462	if (ev_method)	915	if (ev_method (EV_A))
463	{	916	{
464	ev_watcher_init (&sigev, sigcb);
465	siginit ();	917	siginit (EV_A);
466		918
		919	#ifndef _WIN32
467	ev_signal_init (&childev, childcb, SIGCHLD);	920	ev_signal_init (&childev, childcb, SIGCHLD);
		921	ev_set_priority (&childev, EV_MAXPRI);
468	ev_signal_start (&childev);	922	ev_signal_start (EV_A_ &childev);
		923	ev_unref (EV_A); /* child watcher should not keep loop alive */
		924	#endif
469	}	925	}
		926	else
		927	default_loop = 0;
470	}	928	}
471		929
472	return ev_method;	930	return default_loop;
		931	}
		932
		933	void
		934	ev_default_destroy (void)
		935	{
		936	#if EV_MULTIPLICITY
		937	struct ev_loop *loop = default_loop;
		938	#endif
		939
		940	#ifndef _WIN32
		941	ev_ref (EV_A); /* child watcher */
		942	ev_signal_stop (EV_A_ &childev);
		943	#endif
		944
		945	ev_ref (EV_A); /* signal watcher */
		946	ev_io_stop (EV_A_ &sigev);
		947
		948	close (sigpipe [0]); sigpipe [0] = 0;
		949	close (sigpipe [1]); sigpipe [1] = 0;
		950
		951	loop_destroy (EV_A);
		952	}
		953
		954	void
		955	ev_default_fork (void)
		956	{
		957	#if EV_MULTIPLICITY
		958	struct ev_loop *loop = default_loop;
		959	#endif
		960
		961	if (method)
		962	postfork = 1;
473	}	963	}
474		964
475	/*****************************************************************************/	965	/*****************************************************************************/
476		966
477	void
478	ev_prefork (void)
479	{
480	/* nop */
481	}
482
483	void
484	ev_postfork_parent (void)
485	{
486	/* nop */
487	}
488
489	void
490	ev_postfork_child (void)
491	{
492	#if HAVE_EPOLL
493	if (ev_method == EVMETHOD_EPOLL)
494	epoll_postfork_child ();
495	#endif
496
497	ev_io_stop (&sigev);
498	close (sigpipe [0]);
499	close (sigpipe [1]);
500	pipe (sigpipe);
501	siginit ();
502	}
503
504	/*****************************************************************************/
505
506	static void	967	static int
		968	any_pending (EV_P)
		969	{
		970	int pri;
		971
		972	for (pri = NUMPRI; pri--; )
		973	if (pendingcnt [pri])
		974	return 1;
		975
		976	return 0;
		977	}
		978
		979	static void
507	call_pending (void)	980	call_pending (EV_P)
508	{	981	{
		982	int pri;
		983
		984	for (pri = NUMPRI; pri--; )
509	while (pendingcnt)	985	while (pendingcnt [pri])
510	{	986	{
511	ANPENDING *p = pendings + --pendingcnt;	987	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512		988
513	if (p->w)	989	if (p->w)
514	{	990	{
515	p->w->pending = 0;	991	p->w->pending = 0;
516	p->w->cb (p->w, p->events);	992	EV_CB_INVOKE (p->w, p->events);
517	}	993	}
518	}	994	}
519	}	995	}
520		996
521	static void	997	static void
522	timers_reify (void)	998	timers_reify (EV_P)
523	{	999	{
524	while (timercnt && timers [0]->at <= now)	1000	while (timercnt && ((WT)timers [0])->at <= mn_now)
525	{	1001	{
526	struct ev_timer *w = timers [0];	1002	struct ev_timer *w = timers [0];
527		1003
528	event ((W)w, EV_TIMEOUT);	1004	assert (("inactive timer on timer heap detected", ev_is_active (w)));
529		1005
530	/* first reschedule or stop timer */	1006	/* first reschedule or stop timer */
531	if (w->repeat)	1007	if (w->repeat)
532	{	1008	{
		1009	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1010
533	w->at = now + w->repeat;	1011	((WT)w)->at += w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));	1012	if (((WT)w)->at < mn_now)
		1013	((WT)w)->at = mn_now;
		1014
535	downheap ((WT *)timers, timercnt, 0);	1015	downheap ((WT *)timers, timercnt, 0);
536	}	1016	}
537	else	1017	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	1018	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539	}
540	}
541		1019
		1020	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1021	}
		1022	}
		1023
		1024	#if EV_PERIODICS
542	static void	1025	static void
543	periodics_reify (void)	1026	periodics_reify (EV_P)
544	{	1027	{
545	while (periodiccnt && periodics [0]->at <= ev_now)	1028	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
546	{	1029	{
547	struct ev_periodic *w = periodics [0];	1030	struct ev_periodic *w = periodics [0];
548		1031
		1032	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1033
549	/* first reschedule or stop timer */	1034	/* first reschedule or stop timer */
550	if (w->interval)	1035	if (w->reschedule_cb)
551	{	1036	{
		1037	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		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	{
552	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;
553	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));
554	downheap ((WT *)periodics, periodiccnt, 0);	1045	downheap ((WT *)periodics, periodiccnt, 0);
555	}	1046	}
556	else	1047	else
557	ev_periodic_stop (w); /* nonrepeating: stop timer */	1048	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
558		1049
559	event ((W)w, EV_TIMEOUT);	1050	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
560	}	1051	}
561	}	1052	}
562		1053
563	static void	1054	static void
564	periodics_reschedule (ev_tstamp diff)	1055	periodics_reschedule (EV_P)
565	{	1056	{
566	int i;	1057	int i;
567		1058
568	/* adjust periodics after time jump */	1059	/* adjust periodics after time jump */
569	for (i = 0; i < periodiccnt; ++i)	1060	for (i = 0; i < periodiccnt; ++i)
570	{	1061	{
571	struct ev_periodic *w = periodics [i];	1062	struct ev_periodic *w = periodics [i];
572		1063
		1064	if (w->reschedule_cb)
		1065	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
573	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))
574	{	1103	{
575	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1104	ev_tstamp odiff = rtmn_diff;
576		1105
577	if (fabs (diff) >= 1e-4)	1106	for (i = 4; --i; ) /* loop a few times, before making important decisions */
578	{	1107	{
579	ev_periodic_stop (w);	1108	rtmn_diff = ev_rt_now - mn_now;
580	ev_periodic_start (w);
581		1109
582	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;
583	}	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) */
584	}	1123	}
585	}	1124	}
586	}	1125	else
587		1126	#endif
588	static void	1127	{
589	time_update (void)
590	{
591	int i;
592
593	ev_now = ev_time ();	1128	ev_rt_now = ev_time ();
594		1129
595	if (have_monotonic)	1130	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
596	{
597	ev_tstamp odiff = diff;
598
599	for (i = 4; --i; ) /* loop a few times, before making important decisions */
600	{	1131	{
601	now = get_clock ();	1132	#if EV_PERIODICS
602	diff = ev_now - now;
603
604	if (fabs (odiff - diff) < MIN_TIMEJUMP)
605	return; /* all is well */
606
607	ev_now = ev_time ();
608	}
609
610	periodics_reschedule (diff - odiff);
611	/* no timer adjustment, as the monotonic clock doesn't jump */
612	}
613	else
614	{
615	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
616	{
617	periodics_reschedule (ev_now - now);	1133	periodics_reschedule (EV_A);
		1134	#endif
618		1135
619	/* 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 */
620	for (i = 0; i < timercnt; ++i)	1137	for (i = 0; i < timercnt; ++i)
621	timers [i]->at += diff;	1138	((WT)timers [i])->at += ev_rt_now - mn_now;
622	}	1139	}
623		1140
624	now = ev_now;	1141	mn_now = ev_rt_now;
625	}	1142	}
626	}	1143	}
627		1144
628	int ev_loop_done;	1145	void
		1146	ev_ref (EV_P)
		1147	{
		1148	++activecnt;
		1149	}
629		1150
		1151	void
		1152	ev_unref (EV_P)
		1153	{
		1154	--activecnt;
		1155	}
		1156
		1157	static int loop_done;
		1158
		1159	void
630	void ev_loop (int flags)	1160	ev_loop (EV_P_ int flags)
631	{	1161	{
632	double block;	1162	double block;
633	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1163	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
634		1164
635	do	1165	do
636	{	1166	{
637	/* queue check watchers (and execute them) */	1167	/* queue check watchers (and execute them) */
638	if (preparecnt)	1168	if (expect_false (preparecnt))
639	{	1169	{
640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1170	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
641	call_pending ();	1171	call_pending (EV_A);
642	}	1172	}
643		1173
		1174	/* we might have forked, so reify kernel state if necessary */
		1175	if (expect_false (postfork))
		1176	loop_fork (EV_A);
		1177
644	/* update fd-related kernel structures */	1178	/* update fd-related kernel structures */
645	fd_reify ();	1179	fd_reify (EV_A);
646		1180
647	/* calculate blocking time */	1181	/* calculate blocking time */
648		1182
649	/* 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
650	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	{
651	ev_now = ev_time ();	1191	ev_rt_now = ev_time ();
		1192	mn_now = ev_rt_now;
		1193	}
652		1194
653	if (flags & EVLOOP_NONBLOCK || idlecnt)	1195	if (flags & EVLOOP_NONBLOCK || idlecnt)
654	block = 0.;	1196	block = 0.;
655	else	1197	else
656	{	1198	{
657	block = MAX_BLOCKTIME;	1199	block = MAX_BLOCKTIME;
658		1200
659	if (timercnt)	1201	if (timercnt)
660	{	1202	{
661	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;
662	if (block > to) block = to;	1204	if (block > to) block = to;
663	}	1205	}
664		1206
		1207	#if EV_PERIODICS
665	if (periodiccnt)	1208	if (periodiccnt)
666	{	1209	{
667	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1210	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
668	if (block > to) block = to;	1211	if (block > to) block = to;
669	}	1212	}
		1213	#endif
670		1214
671	if (block < 0.) block = 0.;	1215	if (block < 0.) block = 0.;
672	}	1216	}
673		1217
674	method_poll (block);	1218	method_poll (EV_A_ block);
675		1219
676	/* update ev_now, do magic */	1220	/* update ev_rt_now, do magic */
677	time_update ();	1221	time_update (EV_A);
678		1222
679	/* queue pending timers and reschedule them */	1223	/* queue pending timers and reschedule them */
680	timers_reify (); /* relative timers called last */	1224	timers_reify (EV_A); /* relative timers called last */
		1225	#if EV_PERIODICS
681	periodics_reify (); /* absolute timers called first */	1226	periodics_reify (EV_A); /* absolute timers called first */
		1227	#endif
682		1228
683	/* queue idle watchers unless io or timers are pending */	1229	/* queue idle watchers unless io or timers are pending */
684	if (!pendingcnt)	1230	if (idlecnt && !any_pending (EV_A))
685	queue_events ((W *)idles, idlecnt, EV_IDLE);	1231	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
686		1232
687	/* queue check watchers, to be executed first */	1233	/* queue check watchers, to be executed first */
688	if (checkcnt)	1234	if (checkcnt)
689	queue_events ((W *)checks, checkcnt, EV_CHECK);	1235	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690		1236
691	call_pending ();	1237	call_pending (EV_A);
692	}	1238	}
693	while (!ev_loop_done);	1239	while (activecnt && !loop_done);
694		1240
695	if (ev_loop_done != 2)	1241	if (loop_done != 2)
696	ev_loop_done = 0;	1242	loop_done = 0;
		1243	}
		1244
		1245	void
		1246	ev_unloop (EV_P_ int how)
		1247	{
		1248	loop_done = how;
697	}	1249	}
698		1250
699	/*****************************************************************************/	1251	/*****************************************************************************/
700		1252
701	static void	1253	inline void
702	wlist_add (WL *head, WL elem)	1254	wlist_add (WL *head, WL elem)
703	{	1255	{
704	elem->next = *head;	1256	elem->next = *head;
705	*head = elem;	1257	*head = elem;
706	}	1258	}
707		1259
708	static void	1260	inline void
709	wlist_del (WL *head, WL elem)	1261	wlist_del (WL *head, WL elem)
710	{	1262	{
711	while (*head)	1263	while (*head)
712	{	1264	{
713	if (*head == elem)	1265	if (*head == elem)
…		…
718		1270
719	head = &(*head)->next;	1271	head = &(*head)->next;
720	}	1272	}
721	}	1273	}
722		1274
723	static void	1275	inline void
724	ev_clear (W w)	1276	ev_clear_pending (EV_P_ W w)
725	{	1277	{
726	if (w->pending)	1278	if (w->pending)
727	{	1279	{
728	pendings [w->pending - 1].w = 0;	1280	pendings [ABSPRI (w)][w->pending - 1].w = 0;
729	w->pending = 0;	1281	w->pending = 0;
730	}	1282	}
731	}	1283	}
732		1284
733	static void	1285	inline void
734	ev_start (W w, int active)	1286	ev_start (EV_P_ W w, int active)
735	{	1287	{
		1288	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1289	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1290
736	w->active = active;	1291	w->active = active;
		1292	ev_ref (EV_A);
737	}	1293	}
738		1294
739	static void	1295	inline void
740	ev_stop (W w)	1296	ev_stop (EV_P_ W w)
741	{	1297	{
		1298	ev_unref (EV_A);
742	w->active = 0;	1299	w->active = 0;
743	}	1300	}
744		1301
745	/*****************************************************************************/	1302	/*****************************************************************************/
746		1303
747	void	1304	void
748	ev_io_start (struct ev_io *w)	1305	ev_io_start (EV_P_ struct ev_io *w)
749	{	1306	{
		1307	int fd = w->fd;
		1308
750	if (ev_is_active (w))	1309	if (ev_is_active (w))
751	return;	1310	return;
752		1311
753	int fd = w->fd;	1312	assert (("ev_io_start called with negative fd", fd >= 0));
754		1313
755	ev_start ((W)w, 1);	1314	ev_start (EV_A_ (W)w, 1);
756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1315	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
757	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1316	wlist_add ((WL *)&anfds[fd].head, (WL)w);
758		1317
759	fd_change (fd);	1318	fd_change (EV_A_ fd);
760	}	1319	}
761		1320
762	void	1321	void
763	ev_io_stop (struct ev_io *w)	1322	ev_io_stop (EV_P_ struct ev_io *w)
764	{	1323	{
765	ev_clear ((W)w);	1324	ev_clear_pending (EV_A_ (W)w);
766	if (!ev_is_active (w))	1325	if (!ev_is_active (w))
767	return;	1326	return;
768		1327
		1328	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1329
769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1330	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
771		1332
772	fd_change (w->fd);	1333	fd_change (EV_A_ w->fd);
773	}	1334	}
774		1335
775	void	1336	void
776	ev_timer_start (struct ev_timer *w)	1337	ev_timer_start (EV_P_ struct ev_timer *w)
777	{	1338	{
778	if (ev_is_active (w))	1339	if (ev_is_active (w))
779	return;	1340	return;
780		1341
781	w->at += now;	1342	((WT)w)->at += mn_now;
782		1343
783	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.));
784		1345
785	ev_start ((W)w, ++timercnt);	1346	ev_start (EV_A_ (W)w, ++timercnt);
786	array_needsize (timers, timermax, timercnt, );	1347	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
787	timers [timercnt - 1] = w;	1348	timers [timercnt - 1] = w;
788	upheap ((WT *)timers, timercnt - 1);	1349	upheap ((WT *)timers, timercnt - 1);
789	}
790		1350
		1351	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1352	}
		1353
791	void	1354	void
792	ev_timer_stop (struct ev_timer *w)	1355	ev_timer_stop (EV_P_ struct ev_timer *w)
793	{	1356	{
794	ev_clear ((W)w);	1357	ev_clear_pending (EV_A_ (W)w);
795	if (!ev_is_active (w))	1358	if (!ev_is_active (w))
796	return;	1359	return;
797		1360
		1361	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1362
798	if (w->active < timercnt--)	1363	if (((W)w)->active < timercnt--)
799	{	1364	{
800	timers [w->active - 1] = timers [timercnt];	1365	timers [((W)w)->active - 1] = timers [timercnt];
801	downheap ((WT *)timers, timercnt, w->active - 1);	1366	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
802	}	1367	}
803		1368
804	w->at = w->repeat;	1369	((WT)w)->at -= mn_now;
805		1370
806	ev_stop ((W)w);	1371	ev_stop (EV_A_ (W)w);
807	}	1372	}
808		1373
809	void	1374	void
810	ev_timer_again (struct ev_timer *w)	1375	ev_timer_again (EV_P_ struct ev_timer *w)
811	{	1376	{
812	if (ev_is_active (w))	1377	if (ev_is_active (w))
813	{	1378	{
814	if (w->repeat)	1379	if (w->repeat)
815	{	1380	{
816	w->at = now + w->repeat;	1381	((WT)w)->at = mn_now + w->repeat;
817	downheap ((WT *)timers, timercnt, w->active - 1);	1382	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
818	}	1383	}
819	else	1384	else
820	ev_timer_stop (w);	1385	ev_timer_stop (EV_A_ w);
821	}	1386	}
822	else if (w->repeat)	1387	else if (w->repeat)
		1388	{
		1389	w->at = w->repeat;
823	ev_timer_start (w);	1390	ev_timer_start (EV_A_ w);
		1391	}
824	}	1392	}
825		1393
		1394	#if EV_PERIODICS
826	void	1395	void
827	ev_periodic_start (struct ev_periodic *w)	1396	ev_periodic_start (EV_P_ struct ev_periodic *w)
828	{	1397	{
829	if (ev_is_active (w))	1398	if (ev_is_active (w))
830	return;	1399	return;
831		1400
832	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1401	if (w->reschedule_cb)
833		1402	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1403	else if (w->interval)
		1404	{
		1405	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
834	/* this formula differs from the one in periodic_reify because we do not always round up */	1406	/* this formula differs from the one in periodic_reify because we do not always round up */
835	if (w->interval)
836	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1407	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1408	}
837		1409
838	ev_start ((W)w, ++periodiccnt);	1410	ev_start (EV_A_ (W)w, ++periodiccnt);
839	array_needsize (periodics, periodicmax, periodiccnt, );	1411	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
840	periodics [periodiccnt - 1] = w;	1412	periodics [periodiccnt - 1] = w;
841	upheap ((WT *)periodics, periodiccnt - 1);	1413	upheap ((WT *)periodics, periodiccnt - 1);
842	}
843		1414
		1415	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1416	}
		1417
844	void	1418	void
845	ev_periodic_stop (struct ev_periodic *w)	1419	ev_periodic_stop (EV_P_ struct ev_periodic *w)
846	{	1420	{
847	ev_clear ((W)w);	1421	ev_clear_pending (EV_A_ (W)w);
848	if (!ev_is_active (w))	1422	if (!ev_is_active (w))
849	return;	1423	return;
850		1424
		1425	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1426
851	if (w->active < periodiccnt--)	1427	if (((W)w)->active < periodiccnt--)
852	{	1428	{
853	periodics [w->active - 1] = periodics [periodiccnt];	1429	periodics [((W)w)->active - 1] = periodics [periodiccnt];
854	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1430	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
855	}	1431	}
856		1432
857	ev_stop ((W)w);	1433	ev_stop (EV_A_ (W)w);
858	}	1434	}
859		1435
860	void	1436	void
		1437	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1438	{
		1439	/* TODO: use adjustheap and recalculation */
		1440	ev_periodic_stop (EV_A_ w);
		1441	ev_periodic_start (EV_A_ w);
		1442	}
		1443	#endif
		1444
		1445	void
861	ev_signal_start (struct ev_signal *w)	1446	ev_idle_start (EV_P_ struct ev_idle *w)
862	{	1447	{
863	if (ev_is_active (w))	1448	if (ev_is_active (w))
864	return;	1449	return;
865		1450
		1451	ev_start (EV_A_ (W)w, ++idlecnt);
		1452	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1453	idles [idlecnt - 1] = w;
		1454	}
		1455
		1456	void
		1457	ev_idle_stop (EV_P_ struct ev_idle *w)
		1458	{
		1459	ev_clear_pending (EV_A_ (W)w);
		1460	if (!ev_is_active (w))
		1461	return;
		1462
		1463	idles [((W)w)->active - 1] = idles [--idlecnt];
		1464	ev_stop (EV_A_ (W)w);
		1465	}
		1466
		1467	void
		1468	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1469	{
		1470	if (ev_is_active (w))
		1471	return;
		1472
		1473	ev_start (EV_A_ (W)w, ++preparecnt);
		1474	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1475	prepares [preparecnt - 1] = w;
		1476	}
		1477
		1478	void
		1479	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1480	{
		1481	ev_clear_pending (EV_A_ (W)w);
		1482	if (!ev_is_active (w))
		1483	return;
		1484
		1485	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1486	ev_stop (EV_A_ (W)w);
		1487	}
		1488
		1489	void
		1490	ev_check_start (EV_P_ struct ev_check *w)
		1491	{
		1492	if (ev_is_active (w))
		1493	return;
		1494
		1495	ev_start (EV_A_ (W)w, ++checkcnt);
		1496	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1497	checks [checkcnt - 1] = w;
		1498	}
		1499
		1500	void
		1501	ev_check_stop (EV_P_ struct ev_check *w)
		1502	{
		1503	ev_clear_pending (EV_A_ (W)w);
		1504	if (!ev_is_active (w))
		1505	return;
		1506
		1507	checks [((W)w)->active - 1] = checks [--checkcnt];
		1508	ev_stop (EV_A_ (W)w);
		1509	}
		1510
		1511	#ifndef SA_RESTART
		1512	# define SA_RESTART 0
		1513	#endif
		1514
		1515	void
		1516	ev_signal_start (EV_P_ struct ev_signal *w)
		1517	{
		1518	#if EV_MULTIPLICITY
		1519	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1520	#endif
		1521	if (ev_is_active (w))
		1522	return;
		1523
		1524	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1525
866	ev_start ((W)w, 1);	1526	ev_start (EV_A_ (W)w, 1);
867	array_needsize (signals, signalmax, w->signum, signals_init);	1527	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
868	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1528	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869		1529
870	if (!w->next)	1530	if (!((WL)w)->next)
871	{	1531	{
		1532	#if _WIN32
		1533	signal (w->signum, sighandler);
		1534	#else
872	struct sigaction sa;	1535	struct sigaction sa;
873	sa.sa_handler = sighandler;	1536	sa.sa_handler = sighandler;
874	sigfillset (&sa.sa_mask);	1537	sigfillset (&sa.sa_mask);
875	sa.sa_flags = 0;	1538	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876	sigaction (w->signum, &sa, 0);	1539	sigaction (w->signum, &sa, 0);
		1540	#endif
877	}	1541	}
878	}	1542	}
879		1543
880	void	1544	void
881	ev_signal_stop (struct ev_signal *w)	1545	ev_signal_stop (EV_P_ struct ev_signal *w)
882	{	1546	{
883	ev_clear ((W)w);	1547	ev_clear_pending (EV_A_ (W)w);
884	if (!ev_is_active (w))	1548	if (!ev_is_active (w))
885	return;	1549	return;
886		1550
887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1551	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888	ev_stop ((W)w);	1552	ev_stop (EV_A_ (W)w);
889		1553
890	if (!signals [w->signum - 1].head)	1554	if (!signals [w->signum - 1].head)
891	signal (w->signum, SIG_DFL);	1555	signal (w->signum, SIG_DFL);
892	}	1556	}
893		1557
894	void	1558	void
895	ev_idle_start (struct ev_idle *w)	1559	ev_child_start (EV_P_ struct ev_child *w)
896	{	1560	{
		1561	#if EV_MULTIPLICITY
		1562	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1563	#endif
897	if (ev_is_active (w))	1564	if (ev_is_active (w))
898	return;	1565	return;
899		1566
900	ev_start ((W)w, ++idlecnt);
901	array_needsize (idles, idlemax, idlecnt, );
902	idles [idlecnt - 1] = w;
903	}
904
905	void
906	ev_idle_stop (struct ev_idle *w)
907	{
908	ev_clear ((W)w);
909	if (ev_is_active (w))
910	return;
911
912	idles [w->active - 1] = idles [--idlecnt];
913	ev_stop ((W)w);
914	}
915
916	void
917	ev_prepare_start (struct ev_prepare *w)
918	{
919	if (ev_is_active (w))
920	return;
921
922	ev_start ((W)w, ++preparecnt);
923	array_needsize (prepares, preparemax, preparecnt, );
924	prepares [preparecnt - 1] = w;
925	}
926
927	void
928	ev_prepare_stop (struct ev_prepare *w)
929	{
930	ev_clear ((W)w);
931	if (ev_is_active (w))
932	return;
933
934	prepares [w->active - 1] = prepares [--preparecnt];
935	ev_stop ((W)w);
936	}
937
938	void
939	ev_check_start (struct ev_check *w)
940	{
941	if (ev_is_active (w))
942	return;
943
944	ev_start ((W)w, ++checkcnt);
945	array_needsize (checks, checkmax, checkcnt, );
946	checks [checkcnt - 1] = w;
947	}
948
949	void
950	ev_check_stop (struct ev_check *w)
951	{
952	ev_clear ((W)w);
953	if (ev_is_active (w))
954	return;
955
956	checks [w->active - 1] = checks [--checkcnt];
957	ev_stop ((W)w);
958	}
959
960	void
961	ev_child_start (struct ev_child *w)
962	{
963	if (ev_is_active (w))
964	return;
965
966	ev_start ((W)w, 1);	1567	ev_start (EV_A_ (W)w, 1);
967	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1568	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
968	}	1569	}
969		1570
970	void	1571	void
971	ev_child_stop (struct ev_child *w)	1572	ev_child_stop (EV_P_ struct ev_child *w)
972	{	1573	{
973	ev_clear ((W)w);	1574	ev_clear_pending (EV_A_ (W)w);
974	if (ev_is_active (w))	1575	if (!ev_is_active (w))
975	return;	1576	return;
976		1577
977	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1578	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
978	ev_stop ((W)w);	1579	ev_stop (EV_A_ (W)w);
979	}	1580	}
980		1581
981	/*****************************************************************************/	1582	/*****************************************************************************/
982		1583
983	struct ev_once	1584	struct ev_once
…		…
987	void (*cb)(int revents, void *arg);	1588	void (*cb)(int revents, void *arg);
988	void *arg;	1589	void *arg;
989	};	1590	};
990		1591
991	static void	1592	static void
992	once_cb (struct ev_once *once, int revents)	1593	once_cb (EV_P_ struct ev_once *once, int revents)
993	{	1594	{
994	void (*cb)(int revents, void *arg) = once->cb;	1595	void (*cb)(int revents, void *arg) = once->cb;
995	void *arg = once->arg;	1596	void *arg = once->arg;
996		1597
997	ev_io_stop (&once->io);	1598	ev_io_stop (EV_A_ &once->io);
998	ev_timer_stop (&once->to);	1599	ev_timer_stop (EV_A_ &once->to);
999	free (once);	1600	ev_free (once);
1000		1601
1001	cb (revents, arg);	1602	cb (revents, arg);
1002	}	1603	}
1003		1604
1004	static void	1605	static void
1005	once_cb_io (struct ev_io *w, int revents)	1606	once_cb_io (EV_P_ struct ev_io *w, int revents)
1006	{	1607	{
1007	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1608	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1008	}	1609	}
1009		1610
1010	static void	1611	static void
1011	once_cb_to (struct ev_timer *w, int revents)	1612	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1012	{	1613	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1614	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1014	}	1615	}
1015		1616
1016	void	1617	void
1017	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1618	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1018	{	1619	{
1019	struct ev_once *once = malloc (sizeof (struct ev_once));	1620	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1020		1621
1021	if (!once)	1622	if (!once)
1022	cb (EV_ERROR, arg);	1623	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1023	else	1624	else
1024	{	1625	{
1025	once->cb = cb;	1626	once->cb = cb;
1026	once->arg = arg;	1627	once->arg = arg;
1027		1628
1028	ev_watcher_init (&once->io, once_cb_io);	1629	ev_init (&once->io, once_cb_io);
1029
1030	if (fd >= 0)	1630	if (fd >= 0)
1031	{	1631	{
1032	ev_io_set (&once->io, fd, events);	1632	ev_io_set (&once->io, fd, events);
1033	ev_io_start (&once->io);	1633	ev_io_start (EV_A_ &once->io);
1034	}	1634	}
1035		1635
1036	ev_watcher_init (&once->to, once_cb_to);	1636	ev_init (&once->to, once_cb_to);
1037
1038	if (timeout >= 0.)	1637	if (timeout >= 0.)
1039	{	1638	{
1040	ev_timer_set (&once->to, timeout, 0.);	1639	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1640	ev_timer_start (EV_A_ &once->to);
1042	}	1641	}
1043	}	1642	}
1044	}	1643	}
1045		1644
1046	/*****************************************************************************/	1645	#ifdef __cplusplus
1047
1048	#if 0
1049
1050	struct ev_io wio;
1051
1052	static void
1053	sin_cb (struct ev_io *w, int revents)
1054	{
1055	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056	}	1646	}
1057
1058	static void
1059	ocb (struct ev_timer *w, int revents)
1060	{
1061	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062	ev_timer_stop (w);
1063	ev_timer_start (w);
1064	}
1065
1066	static void
1067	scb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070	ev_io_stop (&wio);
1071	ev_io_start (&wio);
1072	}
1073
1074	static void
1075	gcb (struct ev_signal *w, int revents)
1076	{
1077	fprintf (stderr, "generic %x\n", revents);
1078
1079	}
1080
1081	int main (void)
1082	{
1083	ev_init (0);
1084
1085	ev_io_init (&wio, sin_cb, 0, EV_READ);
1086	ev_io_start (&wio);
1087
1088	struct ev_timer t[10000];
1089
1090	#if 0
1091	int i;
1092	for (i = 0; i < 10000; ++i)
1093	{
1094	struct ev_timer *w = t + i;
1095	ev_watcher_init (w, ocb, i);
1096	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097	ev_timer_start (w);
1098	if (drand48 () < 0.5)
1099	ev_timer_stop (w);
1100	}
1101	#endif	1647	#endif
1102		1648
1103	struct ev_timer t1;
1104	ev_timer_init (&t1, ocb, 5, 10);
1105	ev_timer_start (&t1);
1106
1107	struct ev_signal sig;
1108	ev_signal_init (&sig, scb, SIGQUIT);
1109	ev_signal_start (&sig);
1110
1111	struct ev_check cw;
1112	ev_check_init (&cw, gcb);
1113	ev_check_start (&cw);
1114
1115	struct ev_idle iw;
1116	ev_idle_init (&iw, gcb);
1117	ev_idle_start (&iw);
1118
1119	ev_loop (0);
1120
1121	return 0;
1122	}
1123
1124	#endif
1125
1126
1127
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