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Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.133 by root, Fri Nov 23 11:32:22 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	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	#endif
		100
30	#include <math.h>	101	#include <math.h>
31	#include <stdlib.h>	102	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	103	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	104	#include <stddef.h>
36		105
37	#include <stdio.h>	106	#include <stdio.h>
38		107
39	#include <assert.h>	108	#include <assert.h>
40	#include <errno.h>	109	#include <errno.h>
41	#include <sys/time.h>	110	#include <sys/types.h>
42	#include <time.h>	111	#include <time.h>
43		112
44	#ifndef HAVE_MONOTONIC	113	#include <signal.h>
45	# ifdef CLOCK_MONOTONIC	114
46	# define HAVE_MONOTONIC 1	115	#ifndef _WIN32
		116	# include <unistd.h>
		117	# include <sys/time.h>
		118	# include <sys/wait.h>
		119	#else
		120	# define WIN32_LEAN_AND_MEAN
		121	# include <windows.h>
		122	# ifndef EV_SELECT_IS_WINSOCKET
		123	# define EV_SELECT_IS_WINSOCKET 1
47	# endif	124	# endif
48	#endif	125	#endif
49		126
		127	/**/
		128
		129	#ifndef EV_USE_MONOTONIC
		130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
		135	#endif
		136
50	#ifndef HAVE_SELECT	137	#ifndef EV_USE_SELECT
51	# define HAVE_SELECT 1	138	# define EV_USE_SELECT 1
		139	#endif
		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
52	#endif	146	# endif
		147	#endif
53		148
54	#ifndef HAVE_EPOLL	149	#ifndef EV_USE_EPOLL
55	# define HAVE_EPOLL 0	150	# define EV_USE_EPOLL 0
56	#endif	151	#endif
57		152
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
		157	#ifndef EV_USE_PORT
		158	# define EV_USE_PORT 0
		159	#endif
		160
		161	/**/
		162
		163	#ifndef CLOCK_MONOTONIC
		164	# undef EV_USE_MONOTONIC
		165	# define EV_USE_MONOTONIC 0
		166	#endif
		167
58	#ifndef HAVE_REALTIME	168	#ifndef CLOCK_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	169	# undef EV_USE_REALTIME
		170	# define EV_USE_REALTIME 0
60	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
61		178
62	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63	#define MAX_BLOCKTIME 60.	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
64		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
65	#include "ev.h"	187	# include "ev.h"
		188	#endif
		189
		190	#if __GNUC__ >= 3
		191	# define expect(expr,value) __builtin_expect ((expr),(value))
		192	# define inline static inline
		193	#else
		194	# define expect(expr,value) (expr)
		195	# define inline static
		196	#endif
		197
		198	#define expect_false(expr) expect ((expr) != 0, 0)
		199	#define expect_true(expr) expect ((expr) != 0, 1)
		200
		201	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		202	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		203
		204	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		205	#define EMPTY2(a,b) /* used to suppress some warnings */
66		206
67	typedef struct ev_watcher *W;	207	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	208	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	209	typedef struct ev_watcher_time *WT;
70		210
71	static ev_tstamp now, diff; /* monotonic clock */	211	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		212
		213	#ifdef _WIN32
		214	# include "ev_win32.c"
		215	#endif
		216
		217	/*****************************************************************************/
		218
		219	static void (*syserr_cb)(const char *msg);
		220
		221	void ev_set_syserr_cb (void (*cb)(const char *msg))
		222	{
		223	syserr_cb = cb;
		224	}
		225
		226	static void
		227	syserr (const char *msg)
		228	{
		229	if (!msg)
		230	msg = "(libev) system error";
		231
		232	if (syserr_cb)
		233	syserr_cb (msg);
		234	else
		235	{
		236	perror (msg);
		237	abort ();
		238	}
		239	}
		240
		241	static void *(*alloc)(void *ptr, long size);
		242
		243	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		244	{
		245	alloc = cb;
		246	}
		247
		248	static void *
		249	ev_realloc (void *ptr, long size)
		250	{
		251	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		252
		253	if (!ptr && size)
		254	{
		255	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		256	abort ();
		257	}
		258
		259	return ptr;
		260	}
		261
		262	#define ev_malloc(size) ev_realloc (0, (size))
		263	#define ev_free(ptr) ev_realloc ((ptr), 0)
		264
		265	/*****************************************************************************/
		266
		267	typedef struct
		268	{
		269	WL head;
		270	unsigned char events;
		271	unsigned char reify;
		272	#if EV_SELECT_IS_WINSOCKET
		273	SOCKET handle;
		274	#endif
		275	} ANFD;
		276
		277	typedef struct
		278	{
		279	W w;
		280	int events;
		281	} ANPENDING;
		282
		283	#if EV_MULTIPLICITY
		284
		285	struct ev_loop
		286	{
		287	ev_tstamp ev_rt_now;
		288	#define ev_rt_now ((loop)->ev_rt_now)
		289	#define VAR(name,decl) decl;
		290	#include "ev_vars.h"
		291	#undef VAR
		292	};
		293	#include "ev_wrap.h"
		294
		295	static struct ev_loop default_loop_struct;
		296	struct ev_loop *ev_default_loop_ptr;
		297
		298	#else
		299
72	ev_tstamp ev_now;	300	ev_tstamp ev_rt_now;
73	int ev_method;	301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
74		304
75	static int have_monotonic; /* runtime */	305	static int ev_default_loop_ptr;
76		306
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	307	#endif
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		308
81	/*****************************************************************************/	309	/*****************************************************************************/
82		310
83	ev_tstamp	311	ev_tstamp
84	ev_time (void)	312	ev_time (void)
85	{	313	{
86	#if HAVE_REALTIME	314	#if EV_USE_REALTIME
87	struct timespec ts;	315	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	316	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	317	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	318	#else
91	struct timeval tv;	319	struct timeval tv;
92	gettimeofday (&tv, 0);	320	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	321	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	322	#endif
95	}	323	}
96		324
97	static ev_tstamp	325	inline ev_tstamp
98	get_clock (void)	326	get_clock (void)
99	{	327	{
100	#if HAVE_MONOTONIC	328	#if EV_USE_MONOTONIC
101	if (have_monotonic)	329	if (expect_true (have_monotonic))
102	{	330	{
103	struct timespec ts;	331	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	332	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	333	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	334	}
107	#endif	335	#endif
108		336
109	return ev_time ();	337	return ev_time ();
110	}	338	}
111		339
		340	#if EV_MULTIPLICITY
		341	ev_tstamp
		342	ev_now (EV_P)
		343	{
		344	return ev_rt_now;
		345	}
		346	#endif
		347
		348	#define array_roundsize(type,n) (((n) | 4) & ~3)
		349
112	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	351	if (expect_false ((cnt) > cur)) \
114	{ \	352	{ \
115	int newcnt = cur ? cur << 1 : 16; \	353	int newcnt = cur; \
		354	do \
		355	{ \
		356	newcnt = array_roundsize (type, newcnt << 1); \
		357	} \
		358	while ((cnt) > newcnt); \
		359	\
116	base = realloc (base, sizeof (*base) * (newcnt)); \	360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
117	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	362	cur = newcnt; \
119	}	363	}
		364
		365	#define array_slim(type,stem) \
		366	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		367	{ \
		368	stem ## max = array_roundsize (stem ## cnt >> 1); \
		369	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		370	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		371	}
		372
		373	#define array_free(stem, idx) \
		374	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		375
121	/*****************************************************************************/	376	/*****************************************************************************/
122		377
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	378	static void
136	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
137	{	380	{
138	while (count--)	381	while (count--)
139	{	382	{
140	base->head = 0;	383	base->head = 0;
141	base->wev = base->rev = EV_NONE;	384	base->events = EV_NONE;
		385	base->reify = 0;
		386
142	++base;	387	++base;
143	}	388	}
144	}	389	}
145		390
146	typedef struct	391	void
		392	ev_feed_event (EV_P_ void *w, int revents)
147	{	393	{
148	W w;	394	W w_ = (W)w;
149	int events;
150	} ANPENDING;
151		395
152	static ANPENDING *pendings;	396	if (expect_false (w_->pending))
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{	397	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		399	return;
164	}	400	}
165	}
166		401
		402	w_->pending = ++pendingcnt [ABSPRI (w_)];
		403	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		404	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		405	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		406	}
		407
167	static void	408	static void
		409	queue_events (EV_P_ W *events, int eventcnt, int type)
		410	{
		411	int i;
		412
		413	for (i = 0; i < eventcnt; ++i)
		414	ev_feed_event (EV_A_ events [i], type);
		415	}
		416
		417	inline void
168	fd_event (int fd, int events)	418	fd_event (EV_P_ int fd, int revents)
169	{	419	{
170	ANFD *anfd = anfds + fd;	420	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	421	struct ev_io *w;
172		422
173	for (w = anfd->head; w; w = w->next)	423	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
174	{	424	{
175	int ev = w->events & events;	425	int ev = w->events & revents;
176		426
177	if (ev)	427	if (ev)
178	event ((W)w, ev);	428	ev_feed_event (EV_A_ (W)w, ev);
179	}	429	}
180	}	430	}
181		431
182	static void	432	void
183	queue_events (W *events, int eventcnt, int type)	433	ev_feed_fd_event (EV_P_ int fd, int revents)
184	{	434	{
185	int i;	435	fd_event (EV_A_ fd, revents);
186
187	for (i = 0; i < eventcnt; ++i)
188	event (events [i], type);
189	}
190
191	/* called on EBADF to verify fds */
192	static void
193	fd_recheck ()
194	{
195	int fd;
196
197	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)
201	evio_stop (anfds [fd].head);
202	}	436	}
203		437
204	/*****************************************************************************/	438	/*****************************************************************************/
205		439
206	static struct ev_timer **timers;	440	inline void
207	static int timermax, timercnt;	441	fd_reify (EV_P)
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void
213	upheap (WT *timers, int k)
214	{
215	WT w = timers [k];
216
217	while (k && timers [k >> 1]->at > w->at)
218	{
219	timers [k] = timers [k >> 1];
220	timers [k]->active = k + 1;
221	k >>= 1;
222	}
223
224	timers [k] = w;
225	timers [k]->active = k + 1;
226
227	}
228
229	static void
230	downheap (WT *timers, int N, int k)
231	{
232	WT w = timers [k];
233
234	while (k < (N >> 1))
235	{
236	int j = k << 1;
237
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239	++j;
240
241	if (w->at <= timers [j]->at)
242	break;
243
244	timers [k] = timers [j];
245	timers [k]->active = k + 1;
246	k = j;
247	}
248
249	timers [k] = w;
250	timers [k]->active = k + 1;
251	}
252
253	/*****************************************************************************/
254
255	typedef struct
256	{
257	struct ev_signal *head;
258	sig_atomic_t gotsig;
259	} ANSIG;
260
261	static ANSIG *signals;
262	static int signalmax;
263
264	static int sigpipe [2];
265	static sig_atomic_t gotsig;
266	static struct ev_io sigev;
267
268	static void
269	signals_init (ANSIG *base, int count)
270	{
271	while (count--)
272	{
273	base->head = 0;
274	base->gotsig = 0;
275	++base;
276	}
277	}
278
279	static void
280	sighandler (int signum)
281	{
282	signals [signum - 1].gotsig = 1;
283
284	if (!gotsig)
285	{
286	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);
288	}
289	}
290
291	static void
292	sigcb (struct ev_io *iow, int revents)
293	{
294	struct ev_signal *w;
295	int sig;
296
297	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299
300	for (sig = signalmax; sig--; )
301	if (signals [sig].gotsig)
302	{
303	signals [sig].gotsig = 0;
304
305	for (w = signals [sig].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);
307	}
308	}
309
310	static void
311	siginit (void)
312	{
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315
316	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
319
320	evio_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);
322	}
323
324	/*****************************************************************************/
325
326	static struct ev_idle **idles;
327	static int idlemax, idlecnt;
328
329	static struct ev_prepare **prepares;
330	static int preparemax, preparecnt;
331
332	static struct ev_check **checks;
333	static int checkmax, checkcnt;
334
335	/*****************************************************************************/
336
337	#if HAVE_EPOLL
338	# include "ev_epoll.c"
339	#endif
340	#if HAVE_SELECT
341	# include "ev_select.c"
342	#endif
343
344	int ev_init (int flags)
345	{
346	#if HAVE_MONOTONIC
347	{
348	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;
351	}
352	#endif
353
354	ev_now = ev_time ();
355	now = get_clock ();
356	diff = ev_now - now;
357
358	if (pipe (sigpipe))
359	return 0;
360
361	ev_method = EVMETHOD_NONE;
362	#if HAVE_EPOLL
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364	#endif
365	#if HAVE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);
367	#endif
368
369	if (ev_method)
370	{
371	evw_init (&sigev, sigcb);
372	siginit ();
373	}
374
375	return ev_method;
376	}
377
378	/*****************************************************************************/
379
380	void ev_prefork (void)
381	{
382	/* nop */
383	}
384
385	void ev_postfork_parent (void)
386	{
387	/* nop */
388	}
389
390	void ev_postfork_child (void)
391	{
392	#if HAVE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();
395	#endif
396
397	evio_stop (&sigev);
398	close (sigpipe [0]);
399	close (sigpipe [1]);
400	pipe (sigpipe);
401	siginit ();
402	}
403
404	/*****************************************************************************/
405
406	static void
407	fd_reify (void)
408	{	442	{
409	int i;	443	int i;
410		444
411	for (i = 0; i < fdchangecnt; ++i)	445	for (i = 0; i < fdchangecnt; ++i)
412	{	446	{
413	int fd = fdchanges [i];	447	int fd = fdchanges [i];
414	ANFD *anfd = anfds + fd;	448	ANFD *anfd = anfds + fd;
415	struct ev_io *w;	449	struct ev_io *w;
416		450
417	int wev = 0;	451	int events = 0;
418		452
419	for (w = anfd->head; w; w = w->next)	453	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
420	wev |= w->events;	454	events |= w->events;
421		455
422	if (anfd->wev != wev)	456	#if EV_SELECT_IS_WINSOCKET
		457	if (events)
423	{	458	{
424	method_modify (fd, anfd->wev, wev);	459	unsigned long argp;
425	anfd->wev = wev;	460	anfd->handle = _get_osfhandle (fd);
		461	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
426	}	462	}
		463	#endif
		464
		465	anfd->reify = 0;
		466
		467	backend_modify (EV_A_ fd, anfd->events, events);
		468	anfd->events = events;
427	}	469	}
428		470
429	fdchangecnt = 0;	471	fdchangecnt = 0;
430	}	472	}
431		473
432	static void	474	static void
433	call_pending ()	475	fd_change (EV_P_ int fd)
434	{	476	{
435	while (pendingcnt)	477	if (expect_false (anfds [fd].reify))
		478	return;
		479
		480	anfds [fd].reify = 1;
		481
		482	++fdchangecnt;
		483	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		484	fdchanges [fdchangecnt - 1] = fd;
		485	}
		486
		487	static void
		488	fd_kill (EV_P_ int fd)
		489	{
		490	struct ev_io *w;
		491
		492	while ((w = (struct ev_io *)anfds [fd].head))
		493	{
		494	ev_io_stop (EV_A_ w);
		495	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		496	}
		497	}
		498
		499	inline int
		500	fd_valid (int fd)
		501	{
		502	#ifdef _WIN32
		503	return _get_osfhandle (fd) != -1;
		504	#else
		505	return fcntl (fd, F_GETFD) != -1;
		506	#endif
		507	}
		508
		509	/* called on EBADF to verify fds */
		510	static void
		511	fd_ebadf (EV_P)
		512	{
		513	int fd;
		514
		515	for (fd = 0; fd < anfdmax; ++fd)
		516	if (anfds [fd].events)
		517	if (!fd_valid (fd) == -1 && errno == EBADF)
		518	fd_kill (EV_A_ fd);
		519	}
		520
		521	/* called on ENOMEM in select/poll to kill some fds and retry */
		522	static void
		523	fd_enomem (EV_P)
		524	{
		525	int fd;
		526
		527	for (fd = anfdmax; fd--; )
		528	if (anfds [fd].events)
436	{	529	{
437	ANPENDING *p = pendings + --pendingcnt;	530	fd_kill (EV_A_ fd);
		531	return;
		532	}
		533	}
438		534
439	if (p->w)	535	/* usually called after fork if backend needs to re-arm all fds from scratch */
		536	static void
		537	fd_rearm_all (EV_P)
		538	{
		539	int fd;
		540
		541	/* this should be highly optimised to not do anything but set a flag */
		542	for (fd = 0; fd < anfdmax; ++fd)
		543	if (anfds [fd].events)
		544	{
		545	anfds [fd].events = 0;
		546	fd_change (EV_A_ fd);
		547	}
		548	}
		549
		550	/*****************************************************************************/
		551
		552	static void
		553	upheap (WT *heap, int k)
		554	{
		555	WT w = heap [k];
		556
		557	while (k && heap [k >> 1]->at > w->at)
		558	{
		559	heap [k] = heap [k >> 1];
		560	((W)heap [k])->active = k + 1;
		561	k >>= 1;
		562	}
		563
		564	heap [k] = w;
		565	((W)heap [k])->active = k + 1;
		566
		567	}
		568
		569	static void
		570	downheap (WT *heap, int N, int k)
		571	{
		572	WT w = heap [k];
		573
		574	while (k < (N >> 1))
		575	{
		576	int j = k << 1;
		577
		578	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		579	++j;
		580
		581	if (w->at <= heap [j]->at)
		582	break;
		583
		584	heap [k] = heap [j];
		585	((W)heap [k])->active = k + 1;
		586	k = j;
		587	}
		588
		589	heap [k] = w;
		590	((W)heap [k])->active = k + 1;
		591	}
		592
		593	inline void
		594	adjustheap (WT *heap, int N, int k)
		595	{
		596	upheap (heap, k);
		597	downheap (heap, N, k);
		598	}
		599
		600	/*****************************************************************************/
		601
		602	typedef struct
		603	{
		604	WL head;
		605	sig_atomic_t volatile gotsig;
		606	} ANSIG;
		607
		608	static ANSIG *signals;
		609	static int signalmax;
		610
		611	static int sigpipe [2];
		612	static sig_atomic_t volatile gotsig;
		613	static struct ev_io sigev;
		614
		615	static void
		616	signals_init (ANSIG *base, int count)
		617	{
		618	while (count--)
		619	{
		620	base->head = 0;
		621	base->gotsig = 0;
		622
		623	++base;
		624	}
		625	}
		626
		627	static void
		628	sighandler (int signum)
		629	{
		630	#if _WIN32
		631	signal (signum, sighandler);
		632	#endif
		633
		634	signals [signum - 1].gotsig = 1;
		635
		636	if (!gotsig)
		637	{
		638	int old_errno = errno;
		639	gotsig = 1;
		640	write (sigpipe [1], &signum, 1);
		641	errno = old_errno;
		642	}
		643	}
		644
		645	void
		646	ev_feed_signal_event (EV_P_ int signum)
		647	{
		648	WL w;
		649
		650	#if EV_MULTIPLICITY
		651	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		652	#endif
		653
		654	--signum;
		655
		656	if (signum < 0 || signum >= signalmax)
		657	return;
		658
		659	signals [signum].gotsig = 0;
		660
		661	for (w = signals [signum].head; w; w = w->next)
		662	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		663	}
		664
		665	static void
		666	sigcb (EV_P_ struct ev_io *iow, int revents)
		667	{
		668	int signum;
		669
		670	read (sigpipe [0], &revents, 1);
		671	gotsig = 0;
		672
		673	for (signum = signalmax; signum--; )
		674	if (signals [signum].gotsig)
		675	ev_feed_signal_event (EV_A_ signum + 1);
		676	}
		677
		678	static void
		679	fd_intern (int fd)
		680	{
		681	#ifdef _WIN32
		682	int arg = 1;
		683	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		684	#else
		685	fcntl (fd, F_SETFD, FD_CLOEXEC);
		686	fcntl (fd, F_SETFL, O_NONBLOCK);
		687	#endif
		688	}
		689
		690	static void
		691	siginit (EV_P)
		692	{
		693	fd_intern (sigpipe [0]);
		694	fd_intern (sigpipe [1]);
		695
		696	ev_io_set (&sigev, sigpipe [0], EV_READ);
		697	ev_io_start (EV_A_ &sigev);
		698	ev_unref (EV_A); /* child watcher should not keep loop alive */
		699	}
		700
		701	/*****************************************************************************/
		702
		703	static struct ev_child *childs [PID_HASHSIZE];
		704
		705	#ifndef _WIN32
		706
		707	static struct ev_signal childev;
		708
		709	#ifndef WCONTINUED
		710	# define WCONTINUED 0
		711	#endif
		712
		713	static void
		714	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		715	{
		716	struct ev_child *w;
		717
		718	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		719	if (w->pid == pid || !w->pid)
		720	{
		721	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		722	w->rpid = pid;
		723	w->rstatus = status;
		724	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		725	}
		726	}
		727
		728	static void
		729	childcb (EV_P_ struct ev_signal *sw, int revents)
		730	{
		731	int pid, status;
		732
		733	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		734	{
		735	/* make sure we are called again until all childs have been reaped */
		736	/* we need to do it this way so that the callback gets called before we continue */
		737	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		738
		739	child_reap (EV_A_ sw, pid, pid, status);
		740	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		741	}
		742	}
		743
		744	#endif
		745
		746	/*****************************************************************************/
		747
		748	#if EV_USE_PORT
		749	# include "ev_port.c"
		750	#endif
		751	#if EV_USE_KQUEUE
		752	# include "ev_kqueue.c"
		753	#endif
		754	#if EV_USE_EPOLL
		755	# include "ev_epoll.c"
		756	#endif
		757	#if EV_USE_POLL
		758	# include "ev_poll.c"
		759	#endif
		760	#if EV_USE_SELECT
		761	# include "ev_select.c"
		762	#endif
		763
		764	int
		765	ev_version_major (void)
		766	{
		767	return EV_VERSION_MAJOR;
		768	}
		769
		770	int
		771	ev_version_minor (void)
		772	{
		773	return EV_VERSION_MINOR;
		774	}
		775
		776	/* return true if we are running with elevated privileges and should ignore env variables */
		777	static int
		778	enable_secure (void)
		779	{
		780	#ifdef _WIN32
		781	return 0;
		782	#else
		783	return getuid () != geteuid ()
		784	|| getgid () != getegid ();
		785	#endif
		786	}
		787
		788	unsigned int
		789	ev_supported_backends (void)
		790	{
		791	unsigned int flags = 0;
		792
		793	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		794	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		795	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		796	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		797	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		798
		799	return flags;
		800	}
		801
		802	unsigned int
		803	ev_recommended_backends (void)
		804	{
		805	unsigned int flags = ev_supported_backends ();
		806
		807	#ifndef __NetBSD__
		808	/* kqueue is borked on everything but netbsd apparently */
		809	/* it usually doesn't work correctly on anything but sockets and pipes */
		810	flags &= ~EVBACKEND_KQUEUE;
		811	#endif
		812	#ifdef __APPLE__
		813	// flags &= ~EVBACKEND_KQUEUE; for documentation
		814	flags &= ~EVBACKEND_POLL;
		815	#endif
		816
		817	return flags;
		818	}
		819
		820	unsigned int
		821	ev_backend (EV_P)
		822	{
		823	return backend;
		824	}
		825
		826	static void
		827	loop_init (EV_P_ unsigned int flags)
		828	{
		829	if (!backend)
		830	{
		831	#if EV_USE_MONOTONIC
		832	{
		833	struct timespec ts;
		834	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		835	have_monotonic = 1;
		836	}
		837	#endif
		838
		839	ev_rt_now = ev_time ();
		840	mn_now = get_clock ();
		841	now_floor = mn_now;
		842	rtmn_diff = ev_rt_now - mn_now;
		843
		844	if (!(flags & EVFLAG_NOENV)
		845	&& !enable_secure ()
		846	&& getenv ("LIBEV_FLAGS"))
		847	flags = atoi (getenv ("LIBEV_FLAGS"));
		848
		849	if (!(flags & 0x0000ffffUL))
		850	flags |= ev_recommended_backends ();
		851
		852	backend = 0;
		853	#if EV_USE_PORT
		854	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		855	#endif
		856	#if EV_USE_KQUEUE
		857	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		858	#endif
		859	#if EV_USE_EPOLL
		860	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		861	#endif
		862	#if EV_USE_POLL
		863	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		864	#endif
		865	#if EV_USE_SELECT
		866	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		867	#endif
		868
		869	ev_init (&sigev, sigcb);
		870	ev_set_priority (&sigev, EV_MAXPRI);
		871	}
		872	}
		873
		874	static void
		875	loop_destroy (EV_P)
		876	{
		877	int i;
		878
		879	#if EV_USE_PORT
		880	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		881	#endif
		882	#if EV_USE_KQUEUE
		883	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		884	#endif
		885	#if EV_USE_EPOLL
		886	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		887	#endif
		888	#if EV_USE_POLL
		889	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		890	#endif
		891	#if EV_USE_SELECT
		892	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		893	#endif
		894
		895	for (i = NUMPRI; i--; )
		896	array_free (pending, [i]);
		897
		898	/* have to use the microsoft-never-gets-it-right macro */
		899	array_free (fdchange, EMPTY0);
		900	array_free (timer, EMPTY0);
		901	#if EV_PERIODICS
		902	array_free (periodic, EMPTY0);
		903	#endif
		904	array_free (idle, EMPTY0);
		905	array_free (prepare, EMPTY0);
		906	array_free (check, EMPTY0);
		907
		908	backend = 0;
		909	}
		910
		911	static void
		912	loop_fork (EV_P)
		913	{
		914	#if EV_USE_PORT
		915	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		916	#endif
		917	#if EV_USE_KQUEUE
		918	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		919	#endif
		920	#if EV_USE_EPOLL
		921	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		922	#endif
		923
		924	if (ev_is_active (&sigev))
		925	{
		926	/* default loop */
		927
		928	ev_ref (EV_A);
		929	ev_io_stop (EV_A_ &sigev);
		930	close (sigpipe [0]);
		931	close (sigpipe [1]);
		932
		933	while (pipe (sigpipe))
		934	syserr ("(libev) error creating pipe");
		935
		936	siginit (EV_A);
		937	}
		938
		939	postfork = 0;
		940	}
		941
		942	#if EV_MULTIPLICITY
		943	struct ev_loop *
		944	ev_loop_new (unsigned int flags)
		945	{
		946	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		947
		948	memset (loop, 0, sizeof (struct ev_loop));
		949
		950	loop_init (EV_A_ flags);
		951
		952	if (ev_backend (EV_A))
		953	return loop;
		954
		955	return 0;
		956	}
		957
		958	void
		959	ev_loop_destroy (EV_P)
		960	{
		961	loop_destroy (EV_A);
		962	ev_free (loop);
		963	}
		964
		965	void
		966	ev_loop_fork (EV_P)
		967	{
		968	postfork = 1;
		969	}
		970
		971	#endif
		972
		973	#if EV_MULTIPLICITY
		974	struct ev_loop *
		975	ev_default_loop_init (unsigned int flags)
		976	#else
		977	int
		978	ev_default_loop (unsigned int flags)
		979	#endif
		980	{
		981	if (sigpipe [0] == sigpipe [1])
		982	if (pipe (sigpipe))
		983	return 0;
		984
		985	if (!ev_default_loop_ptr)
		986	{
		987	#if EV_MULTIPLICITY
		988	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		989	#else
		990	ev_default_loop_ptr = 1;
		991	#endif
		992
		993	loop_init (EV_A_ flags);
		994
		995	if (ev_backend (EV_A))
440	{	996	{
441	p->w->pending = 0;	997	siginit (EV_A);
442	p->w->cb (p->w, p->events);	998
		999	#ifndef _WIN32
		1000	ev_signal_init (&childev, childcb, SIGCHLD);
		1001	ev_set_priority (&childev, EV_MAXPRI);
		1002	ev_signal_start (EV_A_ &childev);
		1003	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1004	#endif
443	}	1005	}
		1006	else
		1007	ev_default_loop_ptr = 0;
		1008	}
		1009
		1010	return ev_default_loop_ptr;
		1011	}
		1012
		1013	void
		1014	ev_default_destroy (void)
		1015	{
		1016	#if EV_MULTIPLICITY
		1017	struct ev_loop *loop = ev_default_loop_ptr;
		1018	#endif
		1019
		1020	#ifndef _WIN32
		1021	ev_ref (EV_A); /* child watcher */
		1022	ev_signal_stop (EV_A_ &childev);
		1023	#endif
		1024
		1025	ev_ref (EV_A); /* signal watcher */
		1026	ev_io_stop (EV_A_ &sigev);
		1027
		1028	close (sigpipe [0]); sigpipe [0] = 0;
		1029	close (sigpipe [1]); sigpipe [1] = 0;
		1030
		1031	loop_destroy (EV_A);
		1032	}
		1033
		1034	void
		1035	ev_default_fork (void)
		1036	{
		1037	#if EV_MULTIPLICITY
		1038	struct ev_loop *loop = ev_default_loop_ptr;
		1039	#endif
		1040
		1041	if (backend)
		1042	postfork = 1;
		1043	}
		1044
		1045	/*****************************************************************************/
		1046
		1047	static int
		1048	any_pending (EV_P)
		1049	{
		1050	int pri;
		1051
		1052	for (pri = NUMPRI; pri--; )
		1053	if (pendingcnt [pri])
		1054	return 1;
		1055
		1056	return 0;
		1057	}
		1058
		1059	inline void
		1060	call_pending (EV_P)
		1061	{
		1062	int pri;
		1063
		1064	for (pri = NUMPRI; pri--; )
		1065	while (pendingcnt [pri])
		1066	{
		1067	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1068
		1069	if (expect_true (p->w))
		1070	{
		1071	p->w->pending = 0;
		1072	EV_CB_INVOKE (p->w, p->events);
		1073	}
444	}	1074	}
445	}	1075	}
446		1076
447	static void	1077	inline void
448	timers_reify ()	1078	timers_reify (EV_P)
449	{	1079	{
450	while (timercnt && timers [0]->at <= now)	1080	while (timercnt && ((WT)timers [0])->at <= mn_now)
451	{	1081	{
452	struct ev_timer *w = timers [0];	1082	struct ev_timer *w = timers [0];
453		1083
454	event ((W)w, EV_TIMEOUT);	1084	assert (("inactive timer on timer heap detected", ev_is_active (w)));
455		1085
456	/* first reschedule or stop timer */	1086	/* first reschedule or stop timer */
457	if (w->repeat)	1087	if (w->repeat)
458	{	1088	{
		1089	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1090
459	w->at = now + w->repeat;	1091	((WT)w)->at += w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));	1092	if (((WT)w)->at < mn_now)
		1093	((WT)w)->at = mn_now;
		1094
461	downheap ((WT *)timers, timercnt, 0);	1095	downheap ((WT *)timers, timercnt, 0);
462	}	1096	}
463	else	1097	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	1098	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		1099
468	static void	1100	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1101	}
		1102	}
		1103
		1104	#if EV_PERIODICS
		1105	inline void
469	periodics_reify ()	1106	periodics_reify (EV_P)
470	{	1107	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	1108	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
472	{	1109	{
473	struct ev_periodic *w = periodics [0];	1110	struct ev_periodic *w = periodics [0];
474		1111
		1112	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1113
475	/* first reschedule or stop timer */	1114	/* first reschedule or stop timer */
476	if (w->interval)	1115	if (w->reschedule_cb)
477	{	1116	{
		1117	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1118	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1119	downheap ((WT *)periodics, periodiccnt, 0);
		1120	}
		1121	else if (w->interval)
		1122	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1123	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
479	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1124	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
480	downheap ((WT *)periodics, periodiccnt, 0);	1125	downheap ((WT *)periodics, periodiccnt, 0);
481	}	1126	}
482	else	1127	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	1128	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		1129
485	event ((W)w, EV_TIMEOUT);	1130	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486	}	1131	}
487	}	1132	}
488		1133
489	static void	1134	static void
490	periodics_reschedule (ev_tstamp diff)	1135	periodics_reschedule (EV_P)
491	{	1136	{
492	int i;	1137	int i;
493		1138
494	/* adjust periodics after time jump */	1139	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	1140	for (i = 0; i < periodiccnt; ++i)
496	{	1141	{
497	struct ev_periodic *w = periodics [i];	1142	struct ev_periodic *w = periodics [i];
498		1143
		1144	if (w->reschedule_cb)
		1145	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
499	if (w->interval)	1146	else if (w->interval)
		1147	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1148	}
		1149
		1150	/* now rebuild the heap */
		1151	for (i = periodiccnt >> 1; i--; )
		1152	downheap ((WT *)periodics, periodiccnt, i);
		1153	}
		1154	#endif
		1155
		1156	inline int
		1157	time_update_monotonic (EV_P)
		1158	{
		1159	mn_now = get_clock ();
		1160
		1161	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1162	{
		1163	ev_rt_now = rtmn_diff + mn_now;
		1164	return 0;
		1165	}
		1166	else
		1167	{
		1168	now_floor = mn_now;
		1169	ev_rt_now = ev_time ();
		1170	return 1;
		1171	}
		1172	}
		1173
		1174	inline void
		1175	time_update (EV_P)
		1176	{
		1177	int i;
		1178
		1179	#if EV_USE_MONOTONIC
		1180	if (expect_true (have_monotonic))
		1181	{
		1182	if (time_update_monotonic (EV_A))
500	{	1183	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1184	ev_tstamp odiff = rtmn_diff;
502		1185
503	if (fabs (diff) >= 1e-4)	1186	for (i = 4; --i; ) /* loop a few times, before making important decisions */
504	{	1187	{
505	evperiodic_stop (w);	1188	rtmn_diff = ev_rt_now - mn_now;
506	evperiodic_start (w);
507		1189
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1190	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1191	return; /* all is well */
		1192
		1193	ev_rt_now = ev_time ();
		1194	mn_now = get_clock ();
		1195	now_floor = mn_now;
509	}	1196	}
		1197
		1198	# if EV_PERIODICS
		1199	periodics_reschedule (EV_A);
		1200	# endif
		1201	/* no timer adjustment, as the monotonic clock doesn't jump */
		1202	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
510	}	1203	}
511	}	1204	}
512	}	1205	else
513		1206	#endif
514	static void	1207	{
515	time_update ()
516	{
517	int i;
518
519	ev_now = ev_time ();	1208	ev_rt_now = ev_time ();
520		1209
521	if (have_monotonic)	1210	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
522	{
523	ev_tstamp odiff = diff;
524
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
526	{	1211	{
527	now = get_clock ();	1212	#if EV_PERIODICS
528	diff = ev_now - now;
529
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)
531	return; /* all is well */
532
533	ev_now = ev_time ();
534	}
535
536	periodics_reschedule (diff - odiff);
537	/* no timer adjustment, as the monotonic clock doesn't jump */
538	}
539	else
540	{
541	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
542	{
543	periodics_reschedule (ev_now - now);	1213	periodics_reschedule (EV_A);
		1214	#endif
544		1215
545	/* adjust timers. this is easy, as the offset is the same for all */	1216	/* adjust timers. this is easy, as the offset is the same for all */
546	for (i = 0; i < timercnt; ++i)	1217	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	1218	((WT)timers [i])->at += ev_rt_now - mn_now;
548	}	1219	}
549		1220
550	now = ev_now;	1221	mn_now = ev_rt_now;
551	}	1222	}
552	}	1223	}
553		1224
554	int ev_loop_done;	1225	void
		1226	ev_ref (EV_P)
		1227	{
		1228	++activecnt;
		1229	}
555		1230
		1231	void
		1232	ev_unref (EV_P)
		1233	{
		1234	--activecnt;
		1235	}
		1236
		1237	static int loop_done;
		1238
		1239	void
556	void ev_loop (int flags)	1240	ev_loop (EV_P_ int flags)
557	{	1241	{
558	double block;	1242	double block;
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1243	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
560		1244
561	do	1245	while (activecnt)
562	{	1246	{
563	/* queue check watchers (and execute them) */	1247	/* queue check watchers (and execute them) */
564	if (checkcnt)	1248	if (expect_false (preparecnt))
565	{	1249	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1250	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	1251	call_pending (EV_A);
568	}	1252	}
569		1253
		1254	/* we might have forked, so reify kernel state if necessary */
		1255	if (expect_false (postfork))
		1256	loop_fork (EV_A);
		1257
570	/* update fd-related kernel structures */	1258	/* update fd-related kernel structures */
571	fd_reify ();	1259	fd_reify (EV_A);
572		1260
573	/* calculate blocking time */	1261	/* calculate blocking time */
574		1262
575	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1263	/* we only need this for !monotonic clock or timers, but as we basically
		1264	always have timers, we just calculate it always */
		1265	#if EV_USE_MONOTONIC
		1266	if (expect_true (have_monotonic))
		1267	time_update_monotonic (EV_A);
		1268	else
		1269	#endif
		1270	{
576	ev_now = ev_time ();	1271	ev_rt_now = ev_time ();
		1272	mn_now = ev_rt_now;
		1273	}
577		1274
578	if (flags & EVLOOP_NONBLOCK || idlecnt)	1275	if (flags & EVLOOP_NONBLOCK || idlecnt)
579	block = 0.;	1276	block = 0.;
580	else	1277	else
581	{	1278	{
582	block = MAX_BLOCKTIME;	1279	block = MAX_BLOCKTIME;
583		1280
584	if (timercnt)	1281	if (timercnt)
585	{	1282	{
586	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1283	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
587	if (block > to) block = to;	1284	if (block > to) block = to;
588	}	1285	}
589		1286
		1287	#if EV_PERIODICS
590	if (periodiccnt)	1288	if (periodiccnt)
591	{	1289	{
592	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1290	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
593	if (block > to) block = to;	1291	if (block > to) block = to;
594	}	1292	}
		1293	#endif
595		1294
596	if (block < 0.) block = 0.;	1295	if (expect_false (block < 0.)) block = 0.;
597	}	1296	}
598		1297
599	method_poll (block);	1298	backend_poll (EV_A_ block);
600		1299
601	/* update ev_now, do magic */	1300	/* update ev_rt_now, do magic */
602	time_update ();	1301	time_update (EV_A);
603		1302
604	/* queue pending timers and reschedule them */	1303	/* queue pending timers and reschedule them */
605	timers_reify (); /* relative timers called last */	1304	timers_reify (EV_A); /* relative timers called last */
		1305	#if EV_PERIODICS
606	periodics_reify (); /* absolute timers called first */	1306	periodics_reify (EV_A); /* absolute timers called first */
		1307	#endif
607		1308
608	/* queue idle watchers unless io or timers are pending */	1309	/* queue idle watchers unless io or timers are pending */
609	if (!pendingcnt)	1310	if (idlecnt && !any_pending (EV_A))
610	queue_events ((W *)idles, idlecnt, EV_IDLE);	1311	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
611		1312
612	/* queue check watchers, to be executed first */	1313	/* queue check watchers, to be executed first */
613	if (checkcnt)	1314	if (expect_false (checkcnt))
614	queue_events ((W *)checks, checkcnt, EV_CHECK);	1315	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
615		1316
616	call_pending ();	1317	call_pending (EV_A);
617	}
618	while (!ev_loop_done);
619		1318
		1319	if (expect_false (loop_done))
		1320	break;
		1321	}
		1322
620	if (ev_loop_done != 2)	1323	if (loop_done != 2)
621	ev_loop_done = 0;	1324	loop_done = 0;
		1325	}
		1326
		1327	void
		1328	ev_unloop (EV_P_ int how)
		1329	{
		1330	loop_done = how;
622	}	1331	}
623		1332
624	/*****************************************************************************/	1333	/*****************************************************************************/
625		1334
626	static void	1335	inline void
627	wlist_add (WL *head, WL elem)	1336	wlist_add (WL *head, WL elem)
628	{	1337	{
629	elem->next = *head;	1338	elem->next = *head;
630	*head = elem;	1339	*head = elem;
631	}	1340	}
632		1341
633	static void	1342	inline void
634	wlist_del (WL *head, WL elem)	1343	wlist_del (WL *head, WL elem)
635	{	1344	{
636	while (*head)	1345	while (*head)
637	{	1346	{
638	if (*head == elem)	1347	if (*head == elem)
…		…
643		1352
644	head = &(*head)->next;	1353	head = &(*head)->next;
645	}	1354	}
646	}	1355	}
647		1356
648	static void	1357	inline void
649	ev_clear (W w)	1358	ev_clear_pending (EV_P_ W w)
650	{	1359	{
651	if (w->pending)	1360	if (w->pending)
652	{	1361	{
653	pendings [w->pending - 1].w = 0;	1362	pendings [ABSPRI (w)][w->pending - 1].w = 0;
654	w->pending = 0;	1363	w->pending = 0;
655	}	1364	}
656	}	1365	}
657		1366
658	static void	1367	inline void
659	ev_start (W w, int active)	1368	ev_start (EV_P_ W w, int active)
660	{	1369	{
		1370	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1371	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1372
661	w->active = active;	1373	w->active = active;
		1374	ev_ref (EV_A);
662	}	1375	}
663		1376
664	static void	1377	inline void
665	ev_stop (W w)	1378	ev_stop (EV_P_ W w)
666	{	1379	{
		1380	ev_unref (EV_A);
667	w->active = 0;	1381	w->active = 0;
668	}	1382	}
669		1383
670	/*****************************************************************************/	1384	/*****************************************************************************/
671		1385
672	void	1386	void
673	evio_start (struct ev_io *w)	1387	ev_io_start (EV_P_ struct ev_io *w)
674	{	1388	{
		1389	int fd = w->fd;
		1390
675	if (ev_is_active (w))	1391	if (expect_false (ev_is_active (w)))
676	return;	1392	return;
677		1393
678	int fd = w->fd;	1394	assert (("ev_io_start called with negative fd", fd >= 0));
679		1395
680	ev_start ((W)w, 1);	1396	ev_start (EV_A_ (W)w, 1);
681	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1397	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
682	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1398	wlist_add ((WL *)&anfds[fd].head, (WL)w);
683		1399
684	++fdchangecnt;	1400	fd_change (EV_A_ fd);
685	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
686	fdchanges [fdchangecnt - 1] = fd;
687	}	1401	}
688		1402
689	void	1403	void
690	evio_stop (struct ev_io *w)	1404	ev_io_stop (EV_P_ struct ev_io *w)
691	{	1405	{
692	ev_clear ((W)w);	1406	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1407	if (expect_false (!ev_is_active (w)))
694	return;	1408	return;
695		1409
		1410	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1411
696	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1412	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
697	ev_stop ((W)w);	1413	ev_stop (EV_A_ (W)w);
698		1414
699	++fdchangecnt;	1415	fd_change (EV_A_ w->fd);
700	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
701	fdchanges [fdchangecnt - 1] = w->fd;
702	}	1416	}
703		1417
704	void	1418	void
705	evtimer_start (struct ev_timer *w)	1419	ev_timer_start (EV_P_ struct ev_timer *w)
706	{	1420	{
707	if (ev_is_active (w))	1421	if (expect_false (ev_is_active (w)))
708	return;	1422	return;
709		1423
710	w->at += now;	1424	((WT)w)->at += mn_now;
711		1425
712	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1426	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
713		1427
714	ev_start ((W)w, ++timercnt);	1428	ev_start (EV_A_ (W)w, ++timercnt);
715	array_needsize (timers, timermax, timercnt, );	1429	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
716	timers [timercnt - 1] = w;	1430	timers [timercnt - 1] = w;
717	upheap ((WT *)timers, timercnt - 1);	1431	upheap ((WT *)timers, timercnt - 1);
718	}
719		1432
		1433	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1434	}
		1435
720	void	1436	void
721	evtimer_stop (struct ev_timer *w)	1437	ev_timer_stop (EV_P_ struct ev_timer *w)
722	{	1438	{
723	ev_clear ((W)w);	1439	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1440	if (expect_false (!ev_is_active (w)))
725	return;	1441	return;
726		1442
		1443	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1444
727	if (w->active < timercnt--)	1445	if (expect_true (((W)w)->active < timercnt--))
728	{	1446	{
729	timers [w->active - 1] = timers [timercnt];	1447	timers [((W)w)->active - 1] = timers [timercnt];
730	downheap ((WT *)timers, timercnt, w->active - 1);	1448	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1449	}
732		1450
733	w->at = w->repeat;	1451	((WT)w)->at -= mn_now;
734		1452
735	ev_stop ((W)w);	1453	ev_stop (EV_A_ (W)w);
736	}	1454	}
737		1455
738	void	1456	void
739	evtimer_again (struct ev_timer *w)	1457	ev_timer_again (EV_P_ struct ev_timer *w)
740	{	1458	{
741	if (ev_is_active (w))	1459	if (ev_is_active (w))
742	{	1460	{
743	if (w->repeat)	1461	if (w->repeat)
744	{	1462	{
745	w->at = now + w->repeat;	1463	((WT)w)->at = mn_now + w->repeat;
746	downheap ((WT *)timers, timercnt, w->active - 1);	1464	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
747	}	1465	}
748	else	1466	else
749	evtimer_stop (w);	1467	ev_timer_stop (EV_A_ w);
750	}	1468	}
751	else if (w->repeat)	1469	else if (w->repeat)
		1470	{
		1471	w->at = w->repeat;
752	evtimer_start (w);	1472	ev_timer_start (EV_A_ w);
		1473	}
753	}	1474	}
754		1475
		1476	#if EV_PERIODICS
755	void	1477	void
756	evperiodic_start (struct ev_periodic *w)	1478	ev_periodic_start (EV_P_ struct ev_periodic *w)
757	{	1479	{
758	if (ev_is_active (w))	1480	if (expect_false (ev_is_active (w)))
759	return;	1481	return;
760		1482
761	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1483	if (w->reschedule_cb)
762		1484	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1485	else if (w->interval)
		1486	{
		1487	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
763	/* this formula differs from the one in periodic_reify because we do not always round up */	1488	/* this formula differs from the one in periodic_reify because we do not always round up */
764	if (w->interval)
765	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1489	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1490	}
766		1491
767	ev_start ((W)w, ++periodiccnt);	1492	ev_start (EV_A_ (W)w, ++periodiccnt);
768	array_needsize (periodics, periodicmax, periodiccnt, );	1493	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
769	periodics [periodiccnt - 1] = w;	1494	periodics [periodiccnt - 1] = w;
770	upheap ((WT *)periodics, periodiccnt - 1);	1495	upheap ((WT *)periodics, periodiccnt - 1);
771	}
772		1496
		1497	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1498	}
		1499
773	void	1500	void
774	evperiodic_stop (struct ev_periodic *w)	1501	ev_periodic_stop (EV_P_ struct ev_periodic *w)
775	{	1502	{
776	ev_clear ((W)w);	1503	ev_clear_pending (EV_A_ (W)w);
777	if (!ev_is_active (w))	1504	if (expect_false (!ev_is_active (w)))
778	return;	1505	return;
779		1506
		1507	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1508
780	if (w->active < periodiccnt--)	1509	if (expect_true (((W)w)->active < periodiccnt--))
781	{	1510	{
782	periodics [w->active - 1] = periodics [periodiccnt];	1511	periodics [((W)w)->active - 1] = periodics [periodiccnt];
783	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1512	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
784	}	1513	}
785		1514
786	ev_stop ((W)w);	1515	ev_stop (EV_A_ (W)w);
787	}	1516	}
788		1517
789	void	1518	void
790	evsignal_start (struct ev_signal *w)	1519	ev_periodic_again (EV_P_ struct ev_periodic *w)
791	{	1520	{
		1521	/* TODO: use adjustheap and recalculation */
		1522	ev_periodic_stop (EV_A_ w);
		1523	ev_periodic_start (EV_A_ w);
		1524	}
		1525	#endif
		1526
		1527	void
		1528	ev_idle_start (EV_P_ struct ev_idle *w)
		1529	{
792	if (ev_is_active (w))	1530	if (expect_false (ev_is_active (w)))
793	return;	1531	return;
794		1532
		1533	ev_start (EV_A_ (W)w, ++idlecnt);
		1534	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1535	idles [idlecnt - 1] = w;
		1536	}
		1537
		1538	void
		1539	ev_idle_stop (EV_P_ struct ev_idle *w)
		1540	{
		1541	ev_clear_pending (EV_A_ (W)w);
		1542	if (expect_false (!ev_is_active (w)))
		1543	return;
		1544
		1545	idles [((W)w)->active - 1] = idles [--idlecnt];
		1546	ev_stop (EV_A_ (W)w);
		1547	}
		1548
		1549	void
		1550	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1551	{
		1552	if (expect_false (ev_is_active (w)))
		1553	return;
		1554
		1555	ev_start (EV_A_ (W)w, ++preparecnt);
		1556	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1557	prepares [preparecnt - 1] = w;
		1558	}
		1559
		1560	void
		1561	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1562	{
		1563	ev_clear_pending (EV_A_ (W)w);
		1564	if (expect_false (!ev_is_active (w)))
		1565	return;
		1566
		1567	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1568	ev_stop (EV_A_ (W)w);
		1569	}
		1570
		1571	void
		1572	ev_check_start (EV_P_ struct ev_check *w)
		1573	{
		1574	if (expect_false (ev_is_active (w)))
		1575	return;
		1576
		1577	ev_start (EV_A_ (W)w, ++checkcnt);
		1578	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1579	checks [checkcnt - 1] = w;
		1580	}
		1581
		1582	void
		1583	ev_check_stop (EV_P_ struct ev_check *w)
		1584	{
		1585	ev_clear_pending (EV_A_ (W)w);
		1586	if (expect_false (!ev_is_active (w)))
		1587	return;
		1588
		1589	checks [((W)w)->active - 1] = checks [--checkcnt];
		1590	ev_stop (EV_A_ (W)w);
		1591	}
		1592
		1593	#ifndef SA_RESTART
		1594	# define SA_RESTART 0
		1595	#endif
		1596
		1597	void
		1598	ev_signal_start (EV_P_ struct ev_signal *w)
		1599	{
		1600	#if EV_MULTIPLICITY
		1601	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1602	#endif
		1603	if (expect_false (ev_is_active (w)))
		1604	return;
		1605
		1606	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1607
795	ev_start ((W)w, 1);	1608	ev_start (EV_A_ (W)w, 1);
796	array_needsize (signals, signalmax, w->signum, signals_init);	1609	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
797	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1610	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
798		1611
799	if (!w->next)	1612	if (!((WL)w)->next)
800	{	1613	{
		1614	#if _WIN32
		1615	signal (w->signum, sighandler);
		1616	#else
801	struct sigaction sa;	1617	struct sigaction sa;
802	sa.sa_handler = sighandler;	1618	sa.sa_handler = sighandler;
803	sigfillset (&sa.sa_mask);	1619	sigfillset (&sa.sa_mask);
804	sa.sa_flags = 0;	1620	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
805	sigaction (w->signum, &sa, 0);	1621	sigaction (w->signum, &sa, 0);
		1622	#endif
806	}	1623	}
807	}	1624	}
808		1625
809	void	1626	void
810	evsignal_stop (struct ev_signal *w)	1627	ev_signal_stop (EV_P_ struct ev_signal *w)
811	{	1628	{
812	ev_clear ((W)w);	1629	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1630	if (expect_false (!ev_is_active (w)))
814	return;	1631	return;
815		1632
816	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1633	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
817	ev_stop ((W)w);	1634	ev_stop (EV_A_ (W)w);
818		1635
819	if (!signals [w->signum - 1].head)	1636	if (!signals [w->signum - 1].head)
820	signal (w->signum, SIG_DFL);	1637	signal (w->signum, SIG_DFL);
821	}	1638	}
822		1639
823	void evidle_start (struct ev_idle *w)	1640	void
		1641	ev_child_start (EV_P_ struct ev_child *w)
824	{	1642	{
		1643	#if EV_MULTIPLICITY
		1644	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1645	#endif
825	if (ev_is_active (w))	1646	if (expect_false (ev_is_active (w)))
826	return;	1647	return;
827		1648
828	ev_start ((W)w, ++idlecnt);	1649	ev_start (EV_A_ (W)w, 1);
829	array_needsize (idles, idlemax, idlecnt, );	1650	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
830	idles [idlecnt - 1] = w;
831	}	1651	}
832		1652
833	void evidle_stop (struct ev_idle *w)	1653	void
		1654	ev_child_stop (EV_P_ struct ev_child *w)
834	{	1655	{
835	ev_clear ((W)w);	1656	ev_clear_pending (EV_A_ (W)w);
836	if (ev_is_active (w))	1657	if (expect_false (!ev_is_active (w)))
837	return;	1658	return;
838		1659
839	idles [w->active - 1] = idles [--idlecnt];	1660	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
840	ev_stop ((W)w);	1661	ev_stop (EV_A_ (W)w);
841	}
842
843	void evprepare_start (struct ev_prepare *w)
844	{
845	if (ev_is_active (w))
846	return;
847
848	ev_start ((W)w, ++preparecnt);
849	array_needsize (prepares, preparemax, preparecnt, );
850	prepares [preparecnt - 1] = w;
851	}
852
853	void evprepare_stop (struct ev_prepare *w)
854	{
855	ev_clear ((W)w);
856	if (ev_is_active (w))
857	return;
858
859	prepares [w->active - 1] = prepares [--preparecnt];
860	ev_stop ((W)w);
861	}
862
863	void evcheck_start (struct ev_check *w)
864	{
865	if (ev_is_active (w))
866	return;
867
868	ev_start ((W)w, ++checkcnt);
869	array_needsize (checks, checkmax, checkcnt, );
870	checks [checkcnt - 1] = w;
871	}
872
873	void evcheck_stop (struct ev_check *w)
874	{
875	ev_clear ((W)w);
876	if (ev_is_active (w))
877	return;
878
879	checks [w->active - 1] = checks [--checkcnt];
880	ev_stop ((W)w);
881	}	1662	}
882		1663
883	/*****************************************************************************/	1664	/*****************************************************************************/
884		1665
885	struct ev_once	1666	struct ev_once
…		…
889	void (*cb)(int revents, void *arg);	1670	void (*cb)(int revents, void *arg);
890	void *arg;	1671	void *arg;
891	};	1672	};
892		1673
893	static void	1674	static void
894	once_cb (struct ev_once *once, int revents)	1675	once_cb (EV_P_ struct ev_once *once, int revents)
895	{	1676	{
896	void (*cb)(int revents, void *arg) = once->cb;	1677	void (*cb)(int revents, void *arg) = once->cb;
897	void *arg = once->arg;	1678	void *arg = once->arg;
898		1679
899	evio_stop (&once->io);	1680	ev_io_stop (EV_A_ &once->io);
900	evtimer_stop (&once->to);	1681	ev_timer_stop (EV_A_ &once->to);
901	free (once);	1682	ev_free (once);
902		1683
903	cb (revents, arg);	1684	cb (revents, arg);
904	}	1685	}
905		1686
906	static void	1687	static void
907	once_cb_io (struct ev_io *w, int revents)	1688	once_cb_io (EV_P_ struct ev_io *w, int revents)
908	{	1689	{
909	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1690	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
910	}	1691	}
911		1692
912	static void	1693	static void
913	once_cb_to (struct ev_timer *w, int revents)	1694	once_cb_to (EV_P_ struct ev_timer *w, int revents)
914	{	1695	{
915	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1696	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
916	}	1697	}
917		1698
918	void	1699	void
919	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1700	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
920	{	1701	{
921	struct ev_once *once = malloc (sizeof (struct ev_once));	1702	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
922		1703
923	if (!once)	1704	if (expect_false (!once))
924	cb (EV_ERROR, arg);	1705	{
925	else	1706	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1707	return;
926	{	1708	}
		1709
927	once->cb = cb;	1710	once->cb = cb;
928	once->arg = arg;	1711	once->arg = arg;
929		1712
930	evw_init (&once->io, once_cb_io);	1713	ev_init (&once->io, once_cb_io);
931
932	if (fd >= 0)	1714	if (fd >= 0)
933	{	1715	{
934	evio_set (&once->io, fd, events);	1716	ev_io_set (&once->io, fd, events);
935	evio_start (&once->io);	1717	ev_io_start (EV_A_ &once->io);
936	}	1718	}
937		1719
938	evw_init (&once->to, once_cb_to);	1720	ev_init (&once->to, once_cb_to);
939
940	if (timeout >= 0.)	1721	if (timeout >= 0.)
941	{	1722	{
942	evtimer_set (&once->to, timeout, 0.);	1723	ev_timer_set (&once->to, timeout, 0.);
943	evtimer_start (&once->to);	1724	ev_timer_start (EV_A_ &once->to);
944	}
945	}
946	}
947
948	/*****************************************************************************/
949
950	#if 0
951
952	struct ev_io wio;
953
954	static void
955	sin_cb (struct ev_io *w, int revents)
956	{
957	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
958	}
959
960	static void
961	ocb (struct ev_timer *w, int revents)
962	{
963	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
964	evtimer_stop (w);
965	evtimer_start (w);
966	}
967
968	static void
969	scb (struct ev_signal *w, int revents)
970	{
971	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
972	evio_stop (&wio);
973	evio_start (&wio);
974	}
975
976	static void
977	gcb (struct ev_signal *w, int revents)
978	{
979	fprintf (stderr, "generic %x\n", revents);
980
981	}
982
983	int main (void)
984	{
985	ev_init (0);
986
987	evio_init (&wio, sin_cb, 0, EV_READ);
988	evio_start (&wio);
989
990	struct ev_timer t[10000];
991
992	#if 0
993	int i;
994	for (i = 0; i < 10000; ++i)
995	{	1725	}
996	struct ev_timer *w = t + i;
997	evw_init (w, ocb, i);
998	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
999	evtimer_start (w);
1000	if (drand48 () < 0.5)
1001	evtimer_stop (w);
1002	}
1003	#endif
1004
1005	struct ev_timer t1;
1006	evtimer_init (&t1, ocb, 5, 10);
1007	evtimer_start (&t1);
1008
1009	struct ev_signal sig;
1010	evsignal_init (&sig, scb, SIGQUIT);
1011	evsignal_start (&sig);
1012
1013	struct ev_check cw;
1014	evcheck_init (&cw, gcb);
1015	evcheck_start (&cw);
1016
1017	struct ev_idle iw;
1018	evidle_init (&iw, gcb);
1019	evidle_start (&iw);
1020
1021	ev_loop (0);
1022
1023	return 0;
1024	}	1726	}
1025		1727
		1728	#ifdef __cplusplus
		1729	}
1026	#endif	1730	#endif
1027		1731
1028
1029
1030

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