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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 1.119 by root, Fri Nov 16 01:43:52 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	# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT)
		65	# define EV_USE_PORT 1
		66	# endif
		67
		68	#endif
		69
30	#include <math.h>	70	#include <math.h>
31	#include <stdlib.h>	71	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	72	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	73	#include <stddef.h>
36		74
37	#include <stdio.h>	75	#include <stdio.h>
38		76
39	#include <assert.h>	77	#include <assert.h>
40	#include <errno.h>	78	#include <errno.h>
41	#include <sys/types.h>	79	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	80	#include <time.h>
45		81
46	#ifndef HAVE_MONOTONIC	82	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	83
48	# define HAVE_MONOTONIC 1	84	#ifndef _WIN32
		85	# include <unistd.h>
		86	# include <sys/time.h>
		87	# include <sys/wait.h>
		88	#else
		89	# define WIN32_LEAN_AND_MEAN
		90	# include <windows.h>
		91	# ifndef EV_SELECT_IS_WINSOCKET
		92	# define EV_SELECT_IS_WINSOCKET 1
49	# endif	93	# endif
50	#endif	94	#endif
51		95
		96	/**/
		97
		98	#ifndef EV_USE_MONOTONIC
		99	# define EV_USE_MONOTONIC 1
		100	#endif
		101
		102	#ifndef EV_USE_REALTIME
		103	# define EV_USE_REALTIME 1
		104	#endif
		105
52	#ifndef HAVE_SELECT	106	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	107	# define EV_USE_SELECT 1
		108	# define EV_SELECT_USE_FD_SET 1
		109	#endif
		110
		111	#ifndef EV_USE_POLL
		112	# ifdef _WIN32
		113	# define EV_USE_POLL 0
		114	# else
		115	# define EV_USE_POLL 1
54	#endif	116	# endif
		117	#endif
55		118
56	#ifndef HAVE_EPOLL	119	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	120	# define EV_USE_EPOLL 0
58	#endif	121	#endif
59		122
		123	#ifndef EV_USE_KQUEUE
		124	# define EV_USE_KQUEUE 0
		125	#endif
		126
		127	#ifndef EV_USE_PORT
		128	# define EV_USE_PORT 0
		129	#endif
		130
		131	/**/
		132
		133	/* darwin simply cannot be helped */
		134	#ifdef __APPLE__
		135	# undef EV_USE_POLL
		136	# undef EV_USE_KQUEUE
		137	#endif
		138
		139	#ifndef CLOCK_MONOTONIC
		140	# undef EV_USE_MONOTONIC
		141	# define EV_USE_MONOTONIC 0
		142	#endif
		143
60	#ifndef HAVE_REALTIME	144	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	145	# undef EV_USE_REALTIME
		146	# define EV_USE_REALTIME 0
62	#endif	147	#endif
		148
		149	#if EV_SELECT_IS_WINSOCKET
		150	# include <winsock.h>
		151	#endif
		152
		153	/**/
63		154
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	155	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	156	#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 */	157	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		158	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
67		159
		160	#ifdef EV_H
		161	# include EV_H
		162	#else
68	#include "ev.h"	163	# include "ev.h"
		164	#endif
		165
		166	#if __GNUC__ >= 3
		167	# define expect(expr,value) __builtin_expect ((expr),(value))
		168	# define inline inline
		169	#else
		170	# define expect(expr,value) (expr)
		171	# define inline static
		172	#endif
		173
		174	#define expect_false(expr) expect ((expr) != 0, 0)
		175	#define expect_true(expr) expect ((expr) != 0, 1)
		176
		177	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		178	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		179
		180	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		181	#define EMPTY2(a,b) /* used to suppress some warnings */
69		182
70	typedef struct ev_watcher *W;	183	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	184	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	185	typedef struct ev_watcher_time *WT;
73		186
74	static ev_tstamp now, diff; /* monotonic clock */	187	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		188
		189	#ifdef _WIN32
		190	# include "ev_win32.c"
		191	#endif
		192
		193	/*****************************************************************************/
		194
		195	static void (*syserr_cb)(const char *msg);
		196
		197	void ev_set_syserr_cb (void (*cb)(const char *msg))
		198	{
		199	syserr_cb = cb;
		200	}
		201
		202	static void
		203	syserr (const char *msg)
		204	{
		205	if (!msg)
		206	msg = "(libev) system error";
		207
		208	if (syserr_cb)
		209	syserr_cb (msg);
		210	else
		211	{
		212	perror (msg);
		213	abort ();
		214	}
		215	}
		216
		217	static void *(*alloc)(void *ptr, long size);
		218
		219	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		220	{
		221	alloc = cb;
		222	}
		223
		224	static void *
		225	ev_realloc (void *ptr, long size)
		226	{
		227	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		228
		229	if (!ptr && size)
		230	{
		231	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		232	abort ();
		233	}
		234
		235	return ptr;
		236	}
		237
		238	#define ev_malloc(size) ev_realloc (0, (size))
		239	#define ev_free(ptr) ev_realloc ((ptr), 0)
		240
		241	/*****************************************************************************/
		242
		243	typedef struct
		244	{
		245	WL head;
		246	unsigned char events;
		247	unsigned char reify;
		248	#if EV_SELECT_IS_WINSOCKET
		249	SOCKET handle;
		250	#endif
		251	} ANFD;
		252
		253	typedef struct
		254	{
		255	W w;
		256	int events;
		257	} ANPENDING;
		258
		259	#if EV_MULTIPLICITY
		260
		261	struct ev_loop
		262	{
		263	ev_tstamp ev_rt_now;
		264	#define ev_rt_now ((loop)->ev_rt_now)
		265	#define VAR(name,decl) decl;
		266	#include "ev_vars.h"
		267	#undef VAR
		268	};
		269	#include "ev_wrap.h"
		270
		271	static struct ev_loop default_loop_struct;
		272	struct ev_loop *ev_default_loop_ptr;
		273
		274	#else
		275
75	ev_tstamp ev_now;	276	ev_tstamp ev_rt_now;
76	int ev_method;	277	#define VAR(name,decl) static decl;
		278	#include "ev_vars.h"
		279	#undef VAR
77		280
78	static int have_monotonic; /* runtime */	281	static int ev_default_loop_ptr;
79		282
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	283	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		284
84	/*****************************************************************************/	285	/*****************************************************************************/
85		286
86	ev_tstamp	287	ev_tstamp
87	ev_time (void)	288	ev_time (void)
88	{	289	{
89	#if HAVE_REALTIME	290	#if EV_USE_REALTIME
90	struct timespec ts;	291	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	292	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	293	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	294	#else
94	struct timeval tv;	295	struct timeval tv;
95	gettimeofday (&tv, 0);	296	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	297	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	298	#endif
98	}	299	}
99		300
100	static ev_tstamp	301	inline ev_tstamp
101	get_clock (void)	302	get_clock (void)
102	{	303	{
103	#if HAVE_MONOTONIC	304	#if EV_USE_MONOTONIC
104	if (have_monotonic)	305	if (expect_true (have_monotonic))
105	{	306	{
106	struct timespec ts;	307	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	308	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	309	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	310	}
110	#endif	311	#endif
111		312
112	return ev_time ();	313	return ev_time ();
113	}	314	}
114		315
		316	#if EV_MULTIPLICITY
		317	ev_tstamp
		318	ev_now (EV_P)
		319	{
		320	return ev_rt_now;
		321	}
		322	#endif
		323
		324	#define array_roundsize(type,n) (((n) | 4) & ~3)
		325
115	#define array_needsize(base,cur,cnt,init) \	326	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	327	if (expect_false ((cnt) > cur)) \
117	{ \	328	{ \
118	int newcnt = cur; \	329	int newcnt = cur; \
119	do \	330	do \
120	{ \	331	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	332	newcnt = array_roundsize (type, newcnt << 1); \
122	} \	333	} \
123	while ((cnt) > newcnt); \	334	while ((cnt) > newcnt); \
124	\	335	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	336	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
126	init (base + cur, newcnt - cur); \	337	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	338	cur = newcnt; \
128	}	339	}
		340
		341	#define array_slim(type,stem) \
		342	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		343	{ \
		344	stem ## max = array_roundsize (stem ## cnt >> 1); \
		345	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		346	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		347	}
		348
		349	#define array_free(stem, idx) \
		350	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
129		351
130	/*****************************************************************************/	352	/*****************************************************************************/
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		353
141	static void	354	static void
142	anfds_init (ANFD *base, int count)	355	anfds_init (ANFD *base, int count)
143	{	356	{
144	while (count--)	357	while (count--)
145	{	358	{
146	base->head = 0;	359	base->head = 0;
147	base->events = EV_NONE;	360	base->events = EV_NONE;
		361	base->reify = 0;
		362
148	++base;	363	++base;
149	}	364	}
150	}	365	}
151		366
152	typedef struct	367	void
		368	ev_feed_event (EV_P_ void *w, int revents)
153	{	369	{
154	W w;	370	W w_ = (W)w;
155	int events;
156	} ANPENDING;
157		371
158	static ANPENDING *pendings;	372	if (w_->pending)
159	static int pendingmax, pendingcnt;
160
161	static void
162	event (W w, int events)
163	{
164	if (w->active)
165	{	373	{
166	w->pending = ++pendingcnt;
167	array_needsize (pendings, pendingmax, pendingcnt, );
168	pendings [pendingcnt - 1].w = w;
169	pendings [pendingcnt - 1].events = events;	374	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		375	return;
170	}	376	}
171	}
172		377
		378	w_->pending = ++pendingcnt [ABSPRI (w_)];
		379	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		380	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		381	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		382	}
		383
173	static void	384	static void
174	queue_events (W *events, int eventcnt, int type)	385	queue_events (EV_P_ W *events, int eventcnt, int type)
175	{	386	{
176	int i;	387	int i;
177		388
178	for (i = 0; i < eventcnt; ++i)	389	for (i = 0; i < eventcnt; ++i)
179	event (events [i], type);	390	ev_feed_event (EV_A_ events [i], type);
180	}	391	}
181		392
182	static void	393	inline void
183	fd_event (int fd, int events)	394	fd_event (EV_P_ int fd, int revents)
184	{	395	{
185	ANFD *anfd = anfds + fd;	396	ANFD *anfd = anfds + fd;
186	struct ev_io *w;	397	struct ev_io *w;
187		398
188	for (w = anfd->head; w; w = w->next)	399	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
189	{	400	{
190	int ev = w->events & events;	401	int ev = w->events & revents;
191		402
192	if (ev)	403	if (ev)
193	event ((W)w, ev);	404	ev_feed_event (EV_A_ (W)w, ev);
194	}	405	}
		406	}
		407
		408	void
		409	ev_feed_fd_event (EV_P_ int fd, int revents)
		410	{
		411	fd_event (EV_A_ fd, revents);
195	}	412	}
196		413
197	/*****************************************************************************/	414	/*****************************************************************************/
198		415
199	static int *fdchanges;
200	static int fdchangemax, fdchangecnt;
201
202	static void	416	static void
203	fd_reify (void)	417	fd_reify (EV_P)
204	{	418	{
205	int i;	419	int i;
206		420
207	for (i = 0; i < fdchangecnt; ++i)	421	for (i = 0; i < fdchangecnt; ++i)
208	{	422	{
…		…
210	ANFD *anfd = anfds + fd;	424	ANFD *anfd = anfds + fd;
211	struct ev_io *w;	425	struct ev_io *w;
212		426
213	int events = 0;	427	int events = 0;
214		428
215	for (w = anfd->head; w; w = w->next)	429	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
216	events |= w->events;	430	events |= w->events;
217		431
218	anfd->events &= ~EV_REIFY;	432	#if EV_SELECT_IS_WINSOCKET
219		433	if (events)
220	if (anfd->events != events)
221	{	434	{
222	method_modify (fd, anfd->events, events);	435	unsigned long argp;
223	anfd->events = events;	436	anfd->handle = _get_osfhandle (fd);
		437	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
224	}	438	}
		439	#endif
		440
		441	anfd->reify = 0;
		442
		443	method_modify (EV_A_ fd, anfd->events, events);
		444	anfd->events = events;
225	}	445	}
226		446
227	fdchangecnt = 0;	447	fdchangecnt = 0;
228	}	448	}
229		449
230	static void	450	static void
231	fd_change (int fd)	451	fd_change (EV_P_ int fd)
232	{	452	{
233	if (anfds [fd].events & EV_REIFY)	453	if (anfds [fd].reify)
234	return;	454	return;
235		455
236	anfds [fd].events |= EV_REIFY;	456	anfds [fd].reify = 1;
237		457
238	++fdchangecnt;	458	++fdchangecnt;
239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	459	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
240	fdchanges [fdchangecnt - 1] = fd;	460	fdchanges [fdchangecnt - 1] = fd;
241	}	461	}
242		462
		463	static void
		464	fd_kill (EV_P_ int fd)
		465	{
		466	struct ev_io *w;
		467
		468	while ((w = (struct ev_io *)anfds [fd].head))
		469	{
		470	ev_io_stop (EV_A_ w);
		471	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		472	}
		473	}
		474
		475	static int
		476	fd_valid (int fd)
		477	{
		478	#ifdef _WIN32
		479	return _get_osfhandle (fd) != -1;
		480	#else
		481	return fcntl (fd, F_GETFD) != -1;
		482	#endif
		483	}
		484
243	/* called on EBADF to verify fds */	485	/* called on EBADF to verify fds */
244	static void	486	static void
245	fd_recheck (void)	487	fd_ebadf (EV_P)
246	{	488	{
247	int fd;	489	int fd;
248		490
249	for (fd = 0; fd < anfdmax; ++fd)	491	for (fd = 0; fd < anfdmax; ++fd)
250	if (anfds [fd].events)	492	if (anfds [fd].events)
251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	493	if (!fd_valid (fd) == -1 && errno == EBADF)
252	while (anfds [fd].head)	494	fd_kill (EV_A_ fd);
		495	}
		496
		497	/* called on ENOMEM in select/poll to kill some fds and retry */
		498	static void
		499	fd_enomem (EV_P)
		500	{
		501	int fd;
		502
		503	for (fd = anfdmax; fd--; )
		504	if (anfds [fd].events)
253	{	505	{
254	event ((W)anfds [fd].head, EV_ERROR);	506	fd_kill (EV_A_ fd);
255	ev_io_stop (anfds [fd].head);	507	return;
256	}	508	}
		509	}
		510
		511	/* usually called after fork if method needs to re-arm all fds from scratch */
		512	static void
		513	fd_rearm_all (EV_P)
		514	{
		515	int fd;
		516
		517	/* this should be highly optimised to not do anything but set a flag */
		518	for (fd = 0; fd < anfdmax; ++fd)
		519	if (anfds [fd].events)
		520	{
		521	anfds [fd].events = 0;
		522	fd_change (EV_A_ fd);
		523	}
257	}	524	}
258		525
259	/*****************************************************************************/	526	/*****************************************************************************/
260		527
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	528	static void
268	upheap (WT *timers, int k)	529	upheap (WT *heap, int k)
269	{	530	{
270	WT w = timers [k];	531	WT w = heap [k];
271		532
272	while (k && timers [k >> 1]->at > w->at)	533	while (k && heap [k >> 1]->at > w->at)
273	{	534	{
274	timers [k] = timers [k >> 1];	535	heap [k] = heap [k >> 1];
275	timers [k]->active = k + 1;	536	((W)heap [k])->active = k + 1;
276	k >>= 1;	537	k >>= 1;
277	}	538	}
278		539
279	timers [k] = w;	540	heap [k] = w;
280	timers [k]->active = k + 1;	541	((W)heap [k])->active = k + 1;
281		542
282	}	543	}
283		544
284	static void	545	static void
285	downheap (WT *timers, int N, int k)	546	downheap (WT *heap, int N, int k)
286	{	547	{
287	WT w = timers [k];	548	WT w = heap [k];
288		549
289	while (k < (N >> 1))	550	while (k < (N >> 1))
290	{	551	{
291	int j = k << 1;	552	int j = k << 1;
292		553
293	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	554	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
294	++j;	555	++j;
295		556
296	if (w->at <= timers [j]->at)	557	if (w->at <= heap [j]->at)
297	break;	558	break;
298		559
299	timers [k] = timers [j];	560	heap [k] = heap [j];
300	timers [k]->active = k + 1;	561	((W)heap [k])->active = k + 1;
301	k = j;	562	k = j;
302	}	563	}
303		564
304	timers [k] = w;	565	heap [k] = w;
305	timers [k]->active = k + 1;	566	((W)heap [k])->active = k + 1;
		567	}
		568
		569	inline void
		570	adjustheap (WT *heap, int N, int k)
		571	{
		572	upheap (heap, k);
		573	downheap (heap, N, k);
306	}	574	}
307		575
308	/*****************************************************************************/	576	/*****************************************************************************/
309		577
310	typedef struct	578	typedef struct
311	{	579	{
312	struct ev_signal *head;	580	WL head;
313	sig_atomic_t gotsig;	581	sig_atomic_t volatile gotsig;
314	} ANSIG;	582	} ANSIG;
315		583
316	static ANSIG *signals;	584	static ANSIG *signals;
317	static int signalmax;	585	static int signalmax;
318		586
319	static int sigpipe [2];	587	static int sigpipe [2];
320	static sig_atomic_t gotsig;	588	static sig_atomic_t volatile gotsig;
321	static struct ev_io sigev;	589	static struct ev_io sigev;
322		590
323	static void	591	static void
324	signals_init (ANSIG *base, int count)	592	signals_init (ANSIG *base, int count)
325	{	593	{
326	while (count--)	594	while (count--)
327	{	595	{
328	base->head = 0;	596	base->head = 0;
329	base->gotsig = 0;	597	base->gotsig = 0;
		598
330	++base;	599	++base;
331	}	600	}
332	}	601	}
333		602
334	static void	603	static void
335	sighandler (int signum)	604	sighandler (int signum)
336	{	605	{
		606	#if _WIN32
		607	signal (signum, sighandler);
		608	#endif
		609
337	signals [signum - 1].gotsig = 1;	610	signals [signum - 1].gotsig = 1;
338		611
339	if (!gotsig)	612	if (!gotsig)
340	{	613	{
		614	int old_errno = errno;
341	gotsig = 1;	615	gotsig = 1;
342	write (sigpipe [1], &gotsig, 1);	616	write (sigpipe [1], &signum, 1);
		617	errno = old_errno;
343	}	618	}
344	}	619	}
345		620
		621	void
		622	ev_feed_signal_event (EV_P_ int signum)
		623	{
		624	WL w;
		625
		626	#if EV_MULTIPLICITY
		627	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		628	#endif
		629
		630	--signum;
		631
		632	if (signum < 0 || signum >= signalmax)
		633	return;
		634
		635	signals [signum].gotsig = 0;
		636
		637	for (w = signals [signum].head; w; w = w->next)
		638	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		639	}
		640
346	static void	641	static void
347	sigcb (struct ev_io *iow, int revents)	642	sigcb (EV_P_ struct ev_io *iow, int revents)
348	{	643	{
349	struct ev_signal *w;
350	int sig;	644	int signum;
351		645
		646	read (sigpipe [0], &revents, 1);
352	gotsig = 0;	647	gotsig = 0;
353	read (sigpipe [0], &revents, 1);
354		648
355	for (sig = signalmax; sig--; )	649	for (signum = signalmax; signum--; )
356	if (signals [sig].gotsig)	650	if (signals [signum].gotsig)
357	{	651	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	}	652	}
364		653
365	static void	654	inline void
366	siginit (void)	655	fd_intern (int fd)
367	{	656	{
		657	#ifdef _WIN32
		658	int arg = 1;
		659	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		660	#else
368	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	661	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);	662	fcntl (fd, F_SETFL, O_NONBLOCK);
373	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	663	#endif
		664	}
		665
		666	static void
		667	siginit (EV_P)
		668	{
		669	fd_intern (sigpipe [0]);
		670	fd_intern (sigpipe [1]);
374		671
375	ev_io_set (&sigev, sigpipe [0], EV_READ);	672	ev_io_set (&sigev, sigpipe [0], EV_READ);
376	ev_io_start (&sigev);	673	ev_io_start (EV_A_ &sigev);
		674	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	}	675	}
378		676
379	/*****************************************************************************/	677	/*****************************************************************************/
380		678
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];	679	static struct ev_child *childs [PID_HASHSIZE];
		680
		681	#ifndef _WIN32
		682
393	static struct ev_signal childev;	683	static struct ev_signal childev;
394		684
395	#ifndef WCONTINUED	685	#ifndef WCONTINUED
396	# define WCONTINUED 0	686	# define WCONTINUED 0
397	#endif	687	#endif
398		688
399	static void	689	static void
400	childcb (struct ev_signal *sw, int revents)	690	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
401	{	691	{
402	struct ev_child *w;	692	struct ev_child *w;
		693
		694	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		695	if (w->pid == pid || !w->pid)
		696	{
		697	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		698	w->rpid = pid;
		699	w->rstatus = status;
		700	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		701	}
		702	}
		703
		704	static void
		705	childcb (EV_P_ struct ev_signal *sw, int revents)
		706	{
403	int pid, status;	707	int pid, status;
404		708
405	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	709	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	710	{
407	if (w->pid == pid || w->pid == -1)	711	/* make sure we are called again until all childs have been reaped */
408	{	712	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
409	w->status = status;	713
410	event ((W)w, EV_CHILD);	714	child_reap (EV_A_ sw, pid, pid, status);
411	}	715	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		716	}
412	}	717	}
		718
		719	#endif
413		720
414	/*****************************************************************************/	721	/*****************************************************************************/
415		722
		723	#if EV_USE_PORT
		724	# include "ev_port.c"
		725	#endif
		726	#if EV_USE_KQUEUE
		727	# include "ev_kqueue.c"
		728	#endif
416	#if HAVE_EPOLL	729	#if EV_USE_EPOLL
417	# include "ev_epoll.c"	730	# include "ev_epoll.c"
418	#endif	731	#endif
		732	#if EV_USE_POLL
		733	# include "ev_poll.c"
		734	#endif
419	#if HAVE_SELECT	735	#if EV_USE_SELECT
420	# include "ev_select.c"	736	# include "ev_select.c"
421	#endif	737	#endif
422		738
423	int	739	int
424	ev_version_major (void)	740	ev_version_major (void)
…		…
430	ev_version_minor (void)	746	ev_version_minor (void)
431	{	747	{
432	return EV_VERSION_MINOR;	748	return EV_VERSION_MINOR;
433	}	749	}
434		750
435	int ev_init (int flags)	751	/* return true if we are running with elevated privileges and should ignore env variables */
		752	static int
		753	enable_secure (void)
436	{	754	{
		755	#ifdef _WIN32
		756	return 0;
		757	#else
		758	return getuid () != geteuid ()
		759	|| getgid () != getegid ();
		760	#endif
		761	}
		762
		763	unsigned int
		764	ev_method (EV_P)
		765	{
		766	return method;
		767	}
		768
		769	static void
		770	loop_init (EV_P_ unsigned int flags)
		771	{
437	if (!ev_method)	772	if (!method)
438	{	773	{
439	#if HAVE_MONOTONIC	774	#if EV_USE_MONOTONIC
440	{	775	{
441	struct timespec ts;	776	struct timespec ts;
442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	777	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443	have_monotonic = 1;	778	have_monotonic = 1;
444	}	779	}
445	#endif	780	#endif
446		781
447	ev_now = ev_time ();	782	ev_rt_now = ev_time ();
448	now = get_clock ();	783	mn_now = get_clock ();
		784	now_floor = mn_now;
449	diff = ev_now - now;	785	rtmn_diff = ev_rt_now - mn_now;
450		786
		787	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
		788	flags = atoi (getenv ("LIBEV_FLAGS"));
		789
		790	if (!(flags & 0x0000ffff))
		791	flags |= 0x0000ffff;
		792
		793	method = 0;
		794	#if EV_USE_PORT
		795	if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);
		796	#endif
		797	#if EV_USE_KQUEUE
		798	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		799	#endif
		800	#if EV_USE_EPOLL
		801	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
		802	#endif
		803	#if EV_USE_POLL
		804	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
		805	#endif
		806	#if EV_USE_SELECT
		807	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
		808	#endif
		809
		810	ev_init (&sigev, sigcb);
		811	ev_set_priority (&sigev, EV_MAXPRI);
		812	}
		813	}
		814
		815	void
		816	loop_destroy (EV_P)
		817	{
		818	int i;
		819
		820	#if EV_USE_PORT
		821	if (method == EVMETHOD_PORT ) port_destroy (EV_A);
		822	#endif
		823	#if EV_USE_KQUEUE
		824	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		825	#endif
		826	#if EV_USE_EPOLL
		827	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		828	#endif
		829	#if EV_USE_POLL
		830	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		831	#endif
		832	#if EV_USE_SELECT
		833	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		834	#endif
		835
		836	for (i = NUMPRI; i--; )
		837	array_free (pending, [i]);
		838
		839	/* have to use the microsoft-never-gets-it-right macro */
		840	array_free (fdchange, EMPTY0);
		841	array_free (timer, EMPTY0);
		842	#if EV_PERIODICS
		843	array_free (periodic, EMPTY0);
		844	#endif
		845	array_free (idle, EMPTY0);
		846	array_free (prepare, EMPTY0);
		847	array_free (check, EMPTY0);
		848
		849	method = 0;
		850	}
		851
		852	static void
		853	loop_fork (EV_P)
		854	{
		855	#if EV_USE_PORT
		856	if (method == EVMETHOD_PORT ) port_fork (EV_A);
		857	#endif
		858	#if EV_USE_KQUEUE
		859	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		860	#endif
		861	#if EV_USE_EPOLL
		862	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		863	#endif
		864
		865	if (ev_is_active (&sigev))
		866	{
		867	/* default loop */
		868
		869	ev_ref (EV_A);
		870	ev_io_stop (EV_A_ &sigev);
		871	close (sigpipe [0]);
		872	close (sigpipe [1]);
		873
		874	while (pipe (sigpipe))
		875	syserr ("(libev) error creating pipe");
		876
		877	siginit (EV_A);
		878	}
		879
		880	postfork = 0;
		881	}
		882
		883	#if EV_MULTIPLICITY
		884	struct ev_loop *
		885	ev_loop_new (unsigned int flags)
		886	{
		887	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		888
		889	memset (loop, 0, sizeof (struct ev_loop));
		890
		891	loop_init (EV_A_ flags);
		892
		893	if (ev_method (EV_A))
		894	return loop;
		895
		896	return 0;
		897	}
		898
		899	void
		900	ev_loop_destroy (EV_P)
		901	{
		902	loop_destroy (EV_A);
		903	ev_free (loop);
		904	}
		905
		906	void
		907	ev_loop_fork (EV_P)
		908	{
		909	postfork = 1;
		910	}
		911
		912	#endif
		913
		914	#if EV_MULTIPLICITY
		915	struct ev_loop *
		916	ev_default_loop_ (unsigned int flags)
		917	#else
		918	int
		919	ev_default_loop (unsigned int flags)
		920	#endif
		921	{
		922	if (sigpipe [0] == sigpipe [1])
451	if (pipe (sigpipe))	923	if (pipe (sigpipe))
452	return 0;	924	return 0;
453		925
454	ev_method = EVMETHOD_NONE;	926	if (!ev_default_loop_ptr)
455	#if HAVE_EPOLL	927	{
456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	928	#if EV_MULTIPLICITY
		929	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		930	#else
		931	ev_default_loop_ptr = 1;
457	#endif	932	#endif
458	#if HAVE_SELECT
459	if (ev_method == EVMETHOD_NONE) select_init (flags);
460	#endif
461		933
		934	loop_init (EV_A_ flags);
		935
462	if (ev_method)	936	if (ev_method (EV_A))
463	{	937	{
464	ev_watcher_init (&sigev, sigcb);
465	siginit ();	938	siginit (EV_A);
466		939
		940	#ifndef _WIN32
467	ev_signal_init (&childev, childcb, SIGCHLD);	941	ev_signal_init (&childev, childcb, SIGCHLD);
		942	ev_set_priority (&childev, EV_MAXPRI);
468	ev_signal_start (&childev);	943	ev_signal_start (EV_A_ &childev);
		944	ev_unref (EV_A); /* child watcher should not keep loop alive */
		945	#endif
469	}	946	}
		947	else
		948	ev_default_loop_ptr = 0;
470	}	949	}
471		950
472	return ev_method;	951	return ev_default_loop_ptr;
		952	}
		953
		954	void
		955	ev_default_destroy (void)
		956	{
		957	#if EV_MULTIPLICITY
		958	struct ev_loop *loop = ev_default_loop_ptr;
		959	#endif
		960
		961	#ifndef _WIN32
		962	ev_ref (EV_A); /* child watcher */
		963	ev_signal_stop (EV_A_ &childev);
		964	#endif
		965
		966	ev_ref (EV_A); /* signal watcher */
		967	ev_io_stop (EV_A_ &sigev);
		968
		969	close (sigpipe [0]); sigpipe [0] = 0;
		970	close (sigpipe [1]); sigpipe [1] = 0;
		971
		972	loop_destroy (EV_A);
		973	}
		974
		975	void
		976	ev_default_fork (void)
		977	{
		978	#if EV_MULTIPLICITY
		979	struct ev_loop *loop = ev_default_loop_ptr;
		980	#endif
		981
		982	if (method)
		983	postfork = 1;
473	}	984	}
474		985
475	/*****************************************************************************/	986	/*****************************************************************************/
476		987
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	988	static int
		989	any_pending (EV_P)
		990	{
		991	int pri;
		992
		993	for (pri = NUMPRI; pri--; )
		994	if (pendingcnt [pri])
		995	return 1;
		996
		997	return 0;
		998	}
		999
		1000	static void
507	call_pending (void)	1001	call_pending (EV_P)
508	{	1002	{
		1003	int pri;
		1004
		1005	for (pri = NUMPRI; pri--; )
509	while (pendingcnt)	1006	while (pendingcnt [pri])
510	{	1007	{
511	ANPENDING *p = pendings + --pendingcnt;	1008	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512		1009
513	if (p->w)	1010	if (p->w)
514	{	1011	{
515	p->w->pending = 0;	1012	p->w->pending = 0;
516	p->w->cb (p->w, p->events);	1013	EV_CB_INVOKE (p->w, p->events);
517	}	1014	}
518	}	1015	}
519	}	1016	}
520		1017
521	static void	1018	static void
522	timers_reify (void)	1019	timers_reify (EV_P)
523	{	1020	{
524	while (timercnt && timers [0]->at <= now)	1021	while (timercnt && ((WT)timers [0])->at <= mn_now)
525	{	1022	{
526	struct ev_timer *w = timers [0];	1023	struct ev_timer *w = timers [0];
527		1024
528	event ((W)w, EV_TIMEOUT);	1025	assert (("inactive timer on timer heap detected", ev_is_active (w)));
529		1026
530	/* first reschedule or stop timer */	1027	/* first reschedule or stop timer */
531	if (w->repeat)	1028	if (w->repeat)
532	{	1029	{
		1030	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1031
533	w->at = now + w->repeat;	1032	((WT)w)->at += w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));	1033	if (((WT)w)->at < mn_now)
		1034	((WT)w)->at = mn_now;
		1035
535	downheap ((WT *)timers, timercnt, 0);	1036	downheap ((WT *)timers, timercnt, 0);
536	}	1037	}
537	else	1038	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	1039	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539	}
540	}
541		1040
		1041	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1042	}
		1043	}
		1044
		1045	#if EV_PERIODICS
542	static void	1046	static void
543	periodics_reify (void)	1047	periodics_reify (EV_P)
544	{	1048	{
545	while (periodiccnt && periodics [0]->at <= ev_now)	1049	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
546	{	1050	{
547	struct ev_periodic *w = periodics [0];	1051	struct ev_periodic *w = periodics [0];
548		1052
		1053	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1054
549	/* first reschedule or stop timer */	1055	/* first reschedule or stop timer */
550	if (w->interval)	1056	if (w->reschedule_cb)
551	{	1057	{
		1058	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1059	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1060	downheap ((WT *)periodics, periodiccnt, 0);
		1061	}
		1062	else if (w->interval)
		1063	{
552	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1064	((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));	1065	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);	1066	downheap ((WT *)periodics, periodiccnt, 0);
555	}	1067	}
556	else	1068	else
557	ev_periodic_stop (w); /* nonrepeating: stop timer */	1069	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
558		1070
559	event ((W)w, EV_TIMEOUT);	1071	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
560	}	1072	}
561	}	1073	}
562		1074
563	static void	1075	static void
564	periodics_reschedule (ev_tstamp diff)	1076	periodics_reschedule (EV_P)
565	{	1077	{
566	int i;	1078	int i;
567		1079
568	/* adjust periodics after time jump */	1080	/* adjust periodics after time jump */
569	for (i = 0; i < periodiccnt; ++i)	1081	for (i = 0; i < periodiccnt; ++i)
570	{	1082	{
571	struct ev_periodic *w = periodics [i];	1083	struct ev_periodic *w = periodics [i];
572		1084
		1085	if (w->reschedule_cb)
		1086	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
573	if (w->interval)	1087	else if (w->interval)
		1088	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1089	}
		1090
		1091	/* now rebuild the heap */
		1092	for (i = periodiccnt >> 1; i--; )
		1093	downheap ((WT *)periodics, periodiccnt, i);
		1094	}
		1095	#endif
		1096
		1097	inline int
		1098	time_update_monotonic (EV_P)
		1099	{
		1100	mn_now = get_clock ();
		1101
		1102	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1103	{
		1104	ev_rt_now = rtmn_diff + mn_now;
		1105	return 0;
		1106	}
		1107	else
		1108	{
		1109	now_floor = mn_now;
		1110	ev_rt_now = ev_time ();
		1111	return 1;
		1112	}
		1113	}
		1114
		1115	static void
		1116	time_update (EV_P)
		1117	{
		1118	int i;
		1119
		1120	#if EV_USE_MONOTONIC
		1121	if (expect_true (have_monotonic))
		1122	{
		1123	if (time_update_monotonic (EV_A))
574	{	1124	{
575	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1125	ev_tstamp odiff = rtmn_diff;
576		1126
577	if (fabs (diff) >= 1e-4)	1127	for (i = 4; --i; ) /* loop a few times, before making important decisions */
578	{	1128	{
579	ev_periodic_stop (w);	1129	rtmn_diff = ev_rt_now - mn_now;
580	ev_periodic_start (w);
581		1130
582	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1131	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1132	return; /* all is well */
		1133
		1134	ev_rt_now = ev_time ();
		1135	mn_now = get_clock ();
		1136	now_floor = mn_now;
583	}	1137	}
		1138
		1139	# if EV_PERIODICS
		1140	periodics_reschedule (EV_A);
		1141	# endif
		1142	/* no timer adjustment, as the monotonic clock doesn't jump */
		1143	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
584	}	1144	}
585	}	1145	}
586	}	1146	else
587		1147	#endif
588	static void	1148	{
589	time_update (void)
590	{
591	int i;
592
593	ev_now = ev_time ();	1149	ev_rt_now = ev_time ();
594		1150
595	if (have_monotonic)	1151	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	{	1152	{
601	now = get_clock ();	1153	#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);	1154	periodics_reschedule (EV_A);
		1155	#endif
618		1156
619	/* adjust timers. this is easy, as the offset is the same for all */	1157	/* adjust timers. this is easy, as the offset is the same for all */
620	for (i = 0; i < timercnt; ++i)	1158	for (i = 0; i < timercnt; ++i)
621	timers [i]->at += diff;	1159	((WT)timers [i])->at += ev_rt_now - mn_now;
622	}	1160	}
623		1161
624	now = ev_now;	1162	mn_now = ev_rt_now;
625	}	1163	}
626	}	1164	}
627		1165
628	int ev_loop_done;	1166	void
		1167	ev_ref (EV_P)
		1168	{
		1169	++activecnt;
		1170	}
629		1171
		1172	void
		1173	ev_unref (EV_P)
		1174	{
		1175	--activecnt;
		1176	}
		1177
		1178	static int loop_done;
		1179
		1180	void
630	void ev_loop (int flags)	1181	ev_loop (EV_P_ int flags)
631	{	1182	{
632	double block;	1183	double block;
633	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1184	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
634		1185
635	do	1186	while (activecnt)
636	{	1187	{
637	/* queue check watchers (and execute them) */	1188	/* queue check watchers (and execute them) */
638	if (preparecnt)	1189	if (expect_false (preparecnt))
639	{	1190	{
640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1191	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
641	call_pending ();	1192	call_pending (EV_A);
642	}	1193	}
643		1194
		1195	/* we might have forked, so reify kernel state if necessary */
		1196	if (expect_false (postfork))
		1197	loop_fork (EV_A);
		1198
644	/* update fd-related kernel structures */	1199	/* update fd-related kernel structures */
645	fd_reify ();	1200	fd_reify (EV_A);
646		1201
647	/* calculate blocking time */	1202	/* calculate blocking time */
648		1203
649	/* we only need this for !monotonic clockor timers, but as we basically	1204	/* we only need this for !monotonic clock or timers, but as we basically
650	always have timers, we just calculate it always */	1205	always have timers, we just calculate it always */
		1206	#if EV_USE_MONOTONIC
		1207	if (expect_true (have_monotonic))
		1208	time_update_monotonic (EV_A);
		1209	else
		1210	#endif
		1211	{
651	ev_now = ev_time ();	1212	ev_rt_now = ev_time ();
		1213	mn_now = ev_rt_now;
		1214	}
652		1215
653	if (flags & EVLOOP_NONBLOCK || idlecnt)	1216	if (flags & EVLOOP_NONBLOCK || idlecnt)
654	block = 0.;	1217	block = 0.;
655	else	1218	else
656	{	1219	{
657	block = MAX_BLOCKTIME;	1220	block = MAX_BLOCKTIME;
658		1221
659	if (timercnt)	1222	if (timercnt)
660	{	1223	{
661	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1224	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
662	if (block > to) block = to;	1225	if (block > to) block = to;
663	}	1226	}
664		1227
		1228	#if EV_PERIODICS
665	if (periodiccnt)	1229	if (periodiccnt)
666	{	1230	{
667	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1231	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
668	if (block > to) block = to;	1232	if (block > to) block = to;
669	}	1233	}
		1234	#endif
670		1235
671	if (block < 0.) block = 0.;	1236	if (block < 0.) block = 0.;
672	}	1237	}
673		1238
674	method_poll (block);	1239	method_poll (EV_A_ block);
675		1240
676	/* update ev_now, do magic */	1241	/* update ev_rt_now, do magic */
677	time_update ();	1242	time_update (EV_A);
678		1243
679	/* queue pending timers and reschedule them */	1244	/* queue pending timers and reschedule them */
680	timers_reify (); /* relative timers called last */	1245	timers_reify (EV_A); /* relative timers called last */
		1246	#if EV_PERIODICS
681	periodics_reify (); /* absolute timers called first */	1247	periodics_reify (EV_A); /* absolute timers called first */
		1248	#endif
682		1249
683	/* queue idle watchers unless io or timers are pending */	1250	/* queue idle watchers unless io or timers are pending */
684	if (!pendingcnt)	1251	if (idlecnt && !any_pending (EV_A))
685	queue_events ((W *)idles, idlecnt, EV_IDLE);	1252	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
686		1253
687	/* queue check watchers, to be executed first */	1254	/* queue check watchers, to be executed first */
688	if (checkcnt)	1255	if (checkcnt)
689	queue_events ((W *)checks, checkcnt, EV_CHECK);	1256	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690		1257
691	call_pending ();	1258	call_pending (EV_A);
692	}
693	while (!ev_loop_done);
694		1259
		1260	if (loop_done)
		1261	break;
		1262	}
		1263
695	if (ev_loop_done != 2)	1264	if (loop_done != 2)
696	ev_loop_done = 0;	1265	loop_done = 0;
		1266	}
		1267
		1268	void
		1269	ev_unloop (EV_P_ int how)
		1270	{
		1271	loop_done = how;
697	}	1272	}
698		1273
699	/*****************************************************************************/	1274	/*****************************************************************************/
700		1275
701	static void	1276	inline void
702	wlist_add (WL *head, WL elem)	1277	wlist_add (WL *head, WL elem)
703	{	1278	{
704	elem->next = *head;	1279	elem->next = *head;
705	*head = elem;	1280	*head = elem;
706	}	1281	}
707		1282
708	static void	1283	inline void
709	wlist_del (WL *head, WL elem)	1284	wlist_del (WL *head, WL elem)
710	{	1285	{
711	while (*head)	1286	while (*head)
712	{	1287	{
713	if (*head == elem)	1288	if (*head == elem)
…		…
718		1293
719	head = &(*head)->next;	1294	head = &(*head)->next;
720	}	1295	}
721	}	1296	}
722		1297
723	static void	1298	inline void
724	ev_clear (W w)	1299	ev_clear_pending (EV_P_ W w)
725	{	1300	{
726	if (w->pending)	1301	if (w->pending)
727	{	1302	{
728	pendings [w->pending - 1].w = 0;	1303	pendings [ABSPRI (w)][w->pending - 1].w = 0;
729	w->pending = 0;	1304	w->pending = 0;
730	}	1305	}
731	}	1306	}
732		1307
733	static void	1308	inline void
734	ev_start (W w, int active)	1309	ev_start (EV_P_ W w, int active)
735	{	1310	{
		1311	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1312	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1313
736	w->active = active;	1314	w->active = active;
		1315	ev_ref (EV_A);
737	}	1316	}
738		1317
739	static void	1318	inline void
740	ev_stop (W w)	1319	ev_stop (EV_P_ W w)
741	{	1320	{
		1321	ev_unref (EV_A);
742	w->active = 0;	1322	w->active = 0;
743	}	1323	}
744		1324
745	/*****************************************************************************/	1325	/*****************************************************************************/
746		1326
747	void	1327	void
748	ev_io_start (struct ev_io *w)	1328	ev_io_start (EV_P_ struct ev_io *w)
749	{	1329	{
		1330	int fd = w->fd;
		1331
750	if (ev_is_active (w))	1332	if (ev_is_active (w))
751	return;	1333	return;
752		1334
753	int fd = w->fd;	1335	assert (("ev_io_start called with negative fd", fd >= 0));
754		1336
755	ev_start ((W)w, 1);	1337	ev_start (EV_A_ (W)w, 1);
756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1338	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
757	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1339	wlist_add ((WL *)&anfds[fd].head, (WL)w);
758		1340
759	fd_change (fd);	1341	fd_change (EV_A_ fd);
760	}	1342	}
761		1343
762	void	1344	void
763	ev_io_stop (struct ev_io *w)	1345	ev_io_stop (EV_P_ struct ev_io *w)
764	{	1346	{
765	ev_clear ((W)w);	1347	ev_clear_pending (EV_A_ (W)w);
766	if (!ev_is_active (w))	1348	if (!ev_is_active (w))
767	return;	1349	return;
768		1350
		1351	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1352
769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1353	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770	ev_stop ((W)w);	1354	ev_stop (EV_A_ (W)w);
771		1355
772	fd_change (w->fd);	1356	fd_change (EV_A_ w->fd);
773	}	1357	}
774		1358
775	void	1359	void
776	ev_timer_start (struct ev_timer *w)	1360	ev_timer_start (EV_P_ struct ev_timer *w)
777	{	1361	{
778	if (ev_is_active (w))	1362	if (ev_is_active (w))
779	return;	1363	return;
780		1364
781	w->at += now;	1365	((WT)w)->at += mn_now;
782		1366
783	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1367	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
784		1368
785	ev_start ((W)w, ++timercnt);	1369	ev_start (EV_A_ (W)w, ++timercnt);
786	array_needsize (timers, timermax, timercnt, );	1370	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
787	timers [timercnt - 1] = w;	1371	timers [timercnt - 1] = w;
788	upheap ((WT *)timers, timercnt - 1);	1372	upheap ((WT *)timers, timercnt - 1);
789	}
790		1373
		1374	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1375	}
		1376
791	void	1377	void
792	ev_timer_stop (struct ev_timer *w)	1378	ev_timer_stop (EV_P_ struct ev_timer *w)
793	{	1379	{
794	ev_clear ((W)w);	1380	ev_clear_pending (EV_A_ (W)w);
795	if (!ev_is_active (w))	1381	if (!ev_is_active (w))
796	return;	1382	return;
797		1383
		1384	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1385
798	if (w->active < timercnt--)	1386	if (((W)w)->active < timercnt--)
799	{	1387	{
800	timers [w->active - 1] = timers [timercnt];	1388	timers [((W)w)->active - 1] = timers [timercnt];
801	downheap ((WT *)timers, timercnt, w->active - 1);	1389	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
802	}	1390	}
803		1391
804	w->at = w->repeat;	1392	((WT)w)->at -= mn_now;
805		1393
806	ev_stop ((W)w);	1394	ev_stop (EV_A_ (W)w);
807	}	1395	}
808		1396
809	void	1397	void
810	ev_timer_again (struct ev_timer *w)	1398	ev_timer_again (EV_P_ struct ev_timer *w)
811	{	1399	{
812	if (ev_is_active (w))	1400	if (ev_is_active (w))
813	{	1401	{
814	if (w->repeat)	1402	if (w->repeat)
815	{	1403	{
816	w->at = now + w->repeat;	1404	((WT)w)->at = mn_now + w->repeat;
817	downheap ((WT *)timers, timercnt, w->active - 1);	1405	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
818	}	1406	}
819	else	1407	else
820	ev_timer_stop (w);	1408	ev_timer_stop (EV_A_ w);
821	}	1409	}
822	else if (w->repeat)	1410	else if (w->repeat)
		1411	{
		1412	w->at = w->repeat;
823	ev_timer_start (w);	1413	ev_timer_start (EV_A_ w);
		1414	}
824	}	1415	}
825		1416
		1417	#if EV_PERIODICS
826	void	1418	void
827	ev_periodic_start (struct ev_periodic *w)	1419	ev_periodic_start (EV_P_ struct ev_periodic *w)
828	{	1420	{
829	if (ev_is_active (w))	1421	if (ev_is_active (w))
830	return;	1422	return;
831		1423
832	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1424	if (w->reschedule_cb)
833		1425	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1426	else if (w->interval)
		1427	{
		1428	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 */	1429	/* 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;	1430	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1431	}
837		1432
838	ev_start ((W)w, ++periodiccnt);	1433	ev_start (EV_A_ (W)w, ++periodiccnt);
839	array_needsize (periodics, periodicmax, periodiccnt, );	1434	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
840	periodics [periodiccnt - 1] = w;	1435	periodics [periodiccnt - 1] = w;
841	upheap ((WT *)periodics, periodiccnt - 1);	1436	upheap ((WT *)periodics, periodiccnt - 1);
842	}
843		1437
		1438	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1439	}
		1440
844	void	1441	void
845	ev_periodic_stop (struct ev_periodic *w)	1442	ev_periodic_stop (EV_P_ struct ev_periodic *w)
846	{	1443	{
847	ev_clear ((W)w);	1444	ev_clear_pending (EV_A_ (W)w);
848	if (!ev_is_active (w))	1445	if (!ev_is_active (w))
849	return;	1446	return;
850		1447
		1448	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1449
851	if (w->active < periodiccnt--)	1450	if (((W)w)->active < periodiccnt--)
852	{	1451	{
853	periodics [w->active - 1] = periodics [periodiccnt];	1452	periodics [((W)w)->active - 1] = periodics [periodiccnt];
854	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1453	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
855	}	1454	}
856		1455
857	ev_stop ((W)w);	1456	ev_stop (EV_A_ (W)w);
858	}	1457	}
859		1458
860	void	1459	void
		1460	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1461	{
		1462	/* TODO: use adjustheap and recalculation */
		1463	ev_periodic_stop (EV_A_ w);
		1464	ev_periodic_start (EV_A_ w);
		1465	}
		1466	#endif
		1467
		1468	void
861	ev_signal_start (struct ev_signal *w)	1469	ev_idle_start (EV_P_ struct ev_idle *w)
862	{	1470	{
863	if (ev_is_active (w))	1471	if (ev_is_active (w))
864	return;	1472	return;
865		1473
		1474	ev_start (EV_A_ (W)w, ++idlecnt);
		1475	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1476	idles [idlecnt - 1] = w;
		1477	}
		1478
		1479	void
		1480	ev_idle_stop (EV_P_ struct ev_idle *w)
		1481	{
		1482	ev_clear_pending (EV_A_ (W)w);
		1483	if (!ev_is_active (w))
		1484	return;
		1485
		1486	idles [((W)w)->active - 1] = idles [--idlecnt];
		1487	ev_stop (EV_A_ (W)w);
		1488	}
		1489
		1490	void
		1491	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1492	{
		1493	if (ev_is_active (w))
		1494	return;
		1495
		1496	ev_start (EV_A_ (W)w, ++preparecnt);
		1497	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1498	prepares [preparecnt - 1] = w;
		1499	}
		1500
		1501	void
		1502	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1503	{
		1504	ev_clear_pending (EV_A_ (W)w);
		1505	if (!ev_is_active (w))
		1506	return;
		1507
		1508	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1509	ev_stop (EV_A_ (W)w);
		1510	}
		1511
		1512	void
		1513	ev_check_start (EV_P_ struct ev_check *w)
		1514	{
		1515	if (ev_is_active (w))
		1516	return;
		1517
		1518	ev_start (EV_A_ (W)w, ++checkcnt);
		1519	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1520	checks [checkcnt - 1] = w;
		1521	}
		1522
		1523	void
		1524	ev_check_stop (EV_P_ struct ev_check *w)
		1525	{
		1526	ev_clear_pending (EV_A_ (W)w);
		1527	if (!ev_is_active (w))
		1528	return;
		1529
		1530	checks [((W)w)->active - 1] = checks [--checkcnt];
		1531	ev_stop (EV_A_ (W)w);
		1532	}
		1533
		1534	#ifndef SA_RESTART
		1535	# define SA_RESTART 0
		1536	#endif
		1537
		1538	void
		1539	ev_signal_start (EV_P_ struct ev_signal *w)
		1540	{
		1541	#if EV_MULTIPLICITY
		1542	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1543	#endif
		1544	if (ev_is_active (w))
		1545	return;
		1546
		1547	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1548
866	ev_start ((W)w, 1);	1549	ev_start (EV_A_ (W)w, 1);
867	array_needsize (signals, signalmax, w->signum, signals_init);	1550	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
868	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1551	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869		1552
870	if (!w->next)	1553	if (!((WL)w)->next)
871	{	1554	{
		1555	#if _WIN32
		1556	signal (w->signum, sighandler);
		1557	#else
872	struct sigaction sa;	1558	struct sigaction sa;
873	sa.sa_handler = sighandler;	1559	sa.sa_handler = sighandler;
874	sigfillset (&sa.sa_mask);	1560	sigfillset (&sa.sa_mask);
875	sa.sa_flags = 0;	1561	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876	sigaction (w->signum, &sa, 0);	1562	sigaction (w->signum, &sa, 0);
		1563	#endif
877	}	1564	}
878	}	1565	}
879		1566
880	void	1567	void
881	ev_signal_stop (struct ev_signal *w)	1568	ev_signal_stop (EV_P_ struct ev_signal *w)
882	{	1569	{
883	ev_clear ((W)w);	1570	ev_clear_pending (EV_A_ (W)w);
884	if (!ev_is_active (w))	1571	if (!ev_is_active (w))
885	return;	1572	return;
886		1573
887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1574	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888	ev_stop ((W)w);	1575	ev_stop (EV_A_ (W)w);
889		1576
890	if (!signals [w->signum - 1].head)	1577	if (!signals [w->signum - 1].head)
891	signal (w->signum, SIG_DFL);	1578	signal (w->signum, SIG_DFL);
892	}	1579	}
893		1580
894	void	1581	void
895	ev_idle_start (struct ev_idle *w)	1582	ev_child_start (EV_P_ struct ev_child *w)
896	{	1583	{
		1584	#if EV_MULTIPLICITY
		1585	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1586	#endif
897	if (ev_is_active (w))	1587	if (ev_is_active (w))
898	return;	1588	return;
899		1589
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);	1590	ev_start (EV_A_ (W)w, 1);
967	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1591	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
968	}	1592	}
969		1593
970	void	1594	void
971	ev_child_stop (struct ev_child *w)	1595	ev_child_stop (EV_P_ struct ev_child *w)
972	{	1596	{
973	ev_clear ((W)w);	1597	ev_clear_pending (EV_A_ (W)w);
974	if (ev_is_active (w))	1598	if (!ev_is_active (w))
975	return;	1599	return;
976		1600
977	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1601	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
978	ev_stop ((W)w);	1602	ev_stop (EV_A_ (W)w);
979	}	1603	}
980		1604
981	/*****************************************************************************/	1605	/*****************************************************************************/
982		1606
983	struct ev_once	1607	struct ev_once
…		…
987	void (*cb)(int revents, void *arg);	1611	void (*cb)(int revents, void *arg);
988	void *arg;	1612	void *arg;
989	};	1613	};
990		1614
991	static void	1615	static void
992	once_cb (struct ev_once *once, int revents)	1616	once_cb (EV_P_ struct ev_once *once, int revents)
993	{	1617	{
994	void (*cb)(int revents, void *arg) = once->cb;	1618	void (*cb)(int revents, void *arg) = once->cb;
995	void *arg = once->arg;	1619	void *arg = once->arg;
996		1620
997	ev_io_stop (&once->io);	1621	ev_io_stop (EV_A_ &once->io);
998	ev_timer_stop (&once->to);	1622	ev_timer_stop (EV_A_ &once->to);
999	free (once);	1623	ev_free (once);
1000		1624
1001	cb (revents, arg);	1625	cb (revents, arg);
1002	}	1626	}
1003		1627
1004	static void	1628	static void
1005	once_cb_io (struct ev_io *w, int revents)	1629	once_cb_io (EV_P_ struct ev_io *w, int revents)
1006	{	1630	{
1007	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1631	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1008	}	1632	}
1009		1633
1010	static void	1634	static void
1011	once_cb_to (struct ev_timer *w, int revents)	1635	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1012	{	1636	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1637	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1014	}	1638	}
1015		1639
1016	void	1640	void
1017	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1641	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1018	{	1642	{
1019	struct ev_once *once = malloc (sizeof (struct ev_once));	1643	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1020		1644
1021	if (!once)	1645	if (!once)
1022	cb (EV_ERROR, arg);	1646	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1023	else	1647	else
1024	{	1648	{
1025	once->cb = cb;	1649	once->cb = cb;
1026	once->arg = arg;	1650	once->arg = arg;
1027		1651
1028	ev_watcher_init (&once->io, once_cb_io);	1652	ev_init (&once->io, once_cb_io);
1029
1030	if (fd >= 0)	1653	if (fd >= 0)
1031	{	1654	{
1032	ev_io_set (&once->io, fd, events);	1655	ev_io_set (&once->io, fd, events);
1033	ev_io_start (&once->io);	1656	ev_io_start (EV_A_ &once->io);
1034	}	1657	}
1035		1658
1036	ev_watcher_init (&once->to, once_cb_to);	1659	ev_init (&once->to, once_cb_to);
1037
1038	if (timeout >= 0.)	1660	if (timeout >= 0.)
1039	{	1661	{
1040	ev_timer_set (&once->to, timeout, 0.);	1662	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1663	ev_timer_start (EV_A_ &once->to);
1042	}	1664	}
1043	}	1665	}
1044	}	1666	}
1045		1667
1046	/*****************************************************************************/	1668	#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	}	1669	}
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	1670	#endif
1102		1671
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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