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Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.135 by root, Sat Nov 24 06:23:27 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	#define HAVE_EPOLL 1	113	#include <signal.h>
45		114
46	#ifndef HAVE_MONOTONIC	115	#ifndef _WIN32
47	# ifdef CLOCK_MONOTONIC	116	# include <unistd.h>
48	# define HAVE_MONOTONIC 1	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
49	# endif	124	# endif
50	#endif	125	#endif
51		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
52	#ifndef HAVE_SELECT	137	#ifndef EV_USE_SELECT
53	# 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
54	#endif	146	# endif
		147	#endif
55		148
56	#ifndef HAVE_EPOLL	149	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	150	# define EV_USE_EPOLL 0
58	#endif	151	#endif
59		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
60	#ifndef HAVE_REALTIME	168	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	169	# undef EV_USE_REALTIME
		170	# define EV_USE_REALTIME 0
62	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
63		178
64	#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) */
65	#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 */
66		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
67	#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 */
68		206
69	typedef struct ev_watcher *W;	207	typedef struct ev_watcher *W;
70	typedef struct ev_watcher_list *WL;	208	typedef struct ev_watcher_list *WL;
71	typedef struct ev_watcher_time *WT;	209	typedef struct ev_watcher_time *WT;
72		210
73	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
74	ev_tstamp ev_now;	300	ev_tstamp ev_rt_now;
75	int ev_method;	301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
76		304
77	static int have_monotonic; /* runtime */	305	static int ev_default_loop_ptr;
78		306
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	307	#endif
80	static void (*method_modify)(int fd, int oev, int nev);
81	static void (*method_poll)(ev_tstamp timeout);
82		308
83	/*****************************************************************************/	309	/*****************************************************************************/
84		310
85	ev_tstamp	311	ev_tstamp
86	ev_time (void)	312	ev_time (void)
87	{	313	{
88	#if HAVE_REALTIME	314	#if EV_USE_REALTIME
89	struct timespec ts;	315	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	316	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	317	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	318	#else
93	struct timeval tv;	319	struct timeval tv;
94	gettimeofday (&tv, 0);	320	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	321	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	322	#endif
97	}	323	}
98		324
99	static ev_tstamp	325	inline ev_tstamp
100	get_clock (void)	326	get_clock (void)
101	{	327	{
102	#if HAVE_MONOTONIC	328	#if EV_USE_MONOTONIC
103	if (have_monotonic)	329	if (expect_true (have_monotonic))
104	{	330	{
105	struct timespec ts;	331	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	332	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	333	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	334	}
109	#endif	335	#endif
110		336
111	return ev_time ();	337	return ev_time ();
112	}	338	}
113		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
114	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
115	if ((cnt) > cur) \	351	if (expect_false ((cnt) > cur)) \
116	{ \	352	{ \
117	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	\
118	base = realloc (base, sizeof (*base) * (newcnt)); \	360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
119	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
120	cur = newcnt; \	362	cur = newcnt; \
121	}	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;
122		375
123	/*****************************************************************************/	376	/*****************************************************************************/
124		377
125	typedef struct
126	{
127	struct ev_io *head;
128	unsigned char wev, rev; /* want, received event set */
129	} ANFD;
130
131	static ANFD *anfds;
132	static int anfdmax;
133
134	static int *fdchanges;
135	static int fdchangemax, fdchangecnt;
136
137	static void	378	static void
138	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
139	{	380	{
140	while (count--)	381	while (count--)
141	{	382	{
142	base->head = 0;	383	base->head = 0;
143	base->wev = base->rev = EV_NONE;	384	base->events = EV_NONE;
		385	base->reify = 0;
		386
144	++base;	387	++base;
145	}	388	}
146	}	389	}
147		390
148	typedef struct	391	void
		392	ev_feed_event (EV_P_ void *w, int revents)
149	{	393	{
150	W w;	394	W w_ = (W)w;
151	int events;
152	} ANPENDING;
153		395
154	static ANPENDING *pendings;	396	if (expect_false (w_->pending))
155	static int pendingmax, pendingcnt;
156
157	static void
158	event (W w, int events)
159	{
160	if (w->active)
161	{	397	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		399	return;
166	}	400	}
167	}
168		401
		402	if (expect_false (!w_->cb))
		403	return;
		404
		405	w_->pending = ++pendingcnt [ABSPRI (w_)];
		406	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		407	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		408	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		409	}
		410
169	static void	411	static void
		412	queue_events (EV_P_ W *events, int eventcnt, int type)
		413	{
		414	int i;
		415
		416	for (i = 0; i < eventcnt; ++i)
		417	ev_feed_event (EV_A_ events [i], type);
		418	}
		419
		420	inline void
170	fd_event (int fd, int events)	421	fd_event (EV_P_ int fd, int revents)
171	{	422	{
172	ANFD *anfd = anfds + fd;	423	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	424	struct ev_io *w;
174		425
175	for (w = anfd->head; w; w = w->next)	426	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
176	{	427	{
177	int ev = w->events & events;	428	int ev = w->events & revents;
178		429
179	if (ev)	430	if (ev)
180	event ((W)w, ev);	431	ev_feed_event (EV_A_ (W)w, ev);
181	}	432	}
182	}	433	}
183		434
184	static void	435	void
185	queue_events (W *events, int eventcnt, int type)	436	ev_feed_fd_event (EV_P_ int fd, int revents)
186	{	437	{
187	int i;	438	fd_event (EV_A_ fd, revents);
188
189	for (i = 0; i < eventcnt; ++i)
190	event (events [i], type);
191	}	439	}
192		440
193	/*****************************************************************************/	441	/*****************************************************************************/
194		442
195	static struct ev_timer **timers;	443	inline void
196	static int timermax, timercnt;	444	fd_reify (EV_P)
197
198	static struct ev_periodic **periodics;
199	static int periodicmax, periodiccnt;
200
201	static void
202	upheap (WT *timers, int k)
203	{
204	WT w = timers [k];
205
206	while (k && timers [k >> 1]->at > w->at)
207	{
208	timers [k] = timers [k >> 1];
209	timers [k]->active = k + 1;
210	k >>= 1;
211	}
212
213	timers [k] = w;
214	timers [k]->active = k + 1;
215
216	}
217
218	static void
219	downheap (WT *timers, int N, int k)
220	{
221	WT w = timers [k];
222
223	while (k < (N >> 1))
224	{
225	int j = k << 1;
226
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
228	++j;
229
230	if (w->at <= timers [j]->at)
231	break;
232
233	timers [k] = timers [j];
234	timers [k]->active = k + 1;
235	k = j;
236	}
237
238	timers [k] = w;
239	timers [k]->active = k + 1;
240	}
241
242	/*****************************************************************************/
243
244	typedef struct
245	{
246	struct ev_signal *head;
247	sig_atomic_t gotsig;
248	} ANSIG;
249
250	static ANSIG *signals;
251	static int signalmax;
252
253	static int sigpipe [2];
254	static sig_atomic_t gotsig;
255	static struct ev_io sigev;
256
257	static void
258	signals_init (ANSIG *base, int count)
259	{
260	while (count--)
261	{
262	base->head = 0;
263	base->gotsig = 0;
264	++base;
265	}
266	}
267
268	static void
269	sighandler (int signum)
270	{
271	signals [signum - 1].gotsig = 1;
272
273	if (!gotsig)
274	{
275	gotsig = 1;
276	write (sigpipe [1], &gotsig, 1);
277	}
278	}
279
280	static void
281	sigcb (struct ev_io *iow, int revents)
282	{
283	struct ev_signal *w;
284	int sig;
285
286	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288
289	for (sig = signalmax; sig--; )
290	if (signals [sig].gotsig)
291	{
292	signals [sig].gotsig = 0;
293
294	for (w = signals [sig].head; w; w = w->next)
295	event ((W)w, EV_SIGNAL);
296	}
297	}
298
299	static void
300	siginit (void)
301	{
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304
305	/* rather than sort out wether we really need nb, set it */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
308
309	evio_set (&sigev, sigpipe [0], EV_READ);
310	evio_start (&sigev);
311	}
312
313	/*****************************************************************************/
314
315	static struct ev_idle **idles;
316	static int idlemax, idlecnt;
317
318	static struct ev_check **checks;
319	static int checkmax, checkcnt;
320
321	/*****************************************************************************/
322
323	#if HAVE_EPOLL
324	# include "ev_epoll.c"
325	#endif
326	#if HAVE_SELECT
327	# include "ev_select.c"
328	#endif
329
330	int ev_init (int flags)
331	{
332	#if HAVE_MONOTONIC
333	{
334	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;
337	}
338	#endif
339
340	ev_now = ev_time ();
341	now = get_clock ();
342	diff = ev_now - now;
343
344	if (pipe (sigpipe))
345	return 0;
346
347	ev_method = EVMETHOD_NONE;
348	#if HAVE_EPOLL
349	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
350	#endif
351	#if HAVE_SELECT
352	if (ev_method == EVMETHOD_NONE) select_init (flags);
353	#endif
354
355	if (ev_method)
356	{
357	evw_init (&sigev, sigcb);
358	siginit ();
359	}
360
361	return ev_method;
362	}
363
364	/*****************************************************************************/
365
366	void ev_prefork (void)
367	{
368	/* nop */
369	}
370
371	void ev_postfork_parent (void)
372	{
373	/* nop */
374	}
375
376	void ev_postfork_child (void)
377	{
378	#if HAVE_EPOLL
379	if (ev_method == EVMETHOD_EPOLL)
380	epoll_postfork_child ();
381	#endif
382
383	evio_stop (&sigev);
384	close (sigpipe [0]);
385	close (sigpipe [1]);
386	pipe (sigpipe);
387	siginit ();
388	}
389
390	/*****************************************************************************/
391
392	static void
393	fd_reify (void)
394	{	445	{
395	int i;	446	int i;
396		447
397	for (i = 0; i < fdchangecnt; ++i)	448	for (i = 0; i < fdchangecnt; ++i)
398	{	449	{
399	int fd = fdchanges [i];	450	int fd = fdchanges [i];
400	ANFD *anfd = anfds + fd;	451	ANFD *anfd = anfds + fd;
401	struct ev_io *w;	452	struct ev_io *w;
402		453
403	int wev = 0;	454	int events = 0;
404		455
405	for (w = anfd->head; w; w = w->next)	456	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
406	wev |= w->events;	457	events |= w->events;
407		458
408	if (anfd->wev != wev)	459	#if EV_SELECT_IS_WINSOCKET
		460	if (events)
409	{	461	{
410	method_modify (fd, anfd->wev, wev);	462	unsigned long argp;
411	anfd->wev = wev;	463	anfd->handle = _get_osfhandle (fd);
		464	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
412	}	465	}
		466	#endif
		467
		468	anfd->reify = 0;
		469
		470	backend_modify (EV_A_ fd, anfd->events, events);
		471	anfd->events = events;
413	}	472	}
414		473
415	fdchangecnt = 0;	474	fdchangecnt = 0;
416	}	475	}
417		476
418	static void	477	static void
419	call_pending ()	478	fd_change (EV_P_ int fd)
		479	{
		480	if (expect_false (anfds [fd].reify))
		481	return;
		482
		483	anfds [fd].reify = 1;
		484
		485	++fdchangecnt;
		486	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		487	fdchanges [fdchangecnt - 1] = fd;
		488	}
		489
		490	static void
		491	fd_kill (EV_P_ int fd)
		492	{
		493	struct ev_io *w;
		494
		495	while ((w = (struct ev_io *)anfds [fd].head))
		496	{
		497	ev_io_stop (EV_A_ w);
		498	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		499	}
		500	}
		501
		502	inline int
		503	fd_valid (int fd)
		504	{
		505	#ifdef _WIN32
		506	return _get_osfhandle (fd) != -1;
		507	#else
		508	return fcntl (fd, F_GETFD) != -1;
		509	#endif
		510	}
		511
		512	/* called on EBADF to verify fds */
		513	static void
		514	fd_ebadf (EV_P)
		515	{
		516	int fd;
		517
		518	for (fd = 0; fd < anfdmax; ++fd)
		519	if (anfds [fd].events)
		520	if (!fd_valid (fd) == -1 && errno == EBADF)
		521	fd_kill (EV_A_ fd);
		522	}
		523
		524	/* called on ENOMEM in select/poll to kill some fds and retry */
		525	static void
		526	fd_enomem (EV_P)
		527	{
		528	int fd;
		529
		530	for (fd = anfdmax; fd--; )
		531	if (anfds [fd].events)
		532	{
		533	fd_kill (EV_A_ fd);
		534	return;
		535	}
		536	}
		537
		538	/* usually called after fork if backend needs to re-arm all fds from scratch */
		539	static void
		540	fd_rearm_all (EV_P)
		541	{
		542	int fd;
		543
		544	/* this should be highly optimised to not do anything but set a flag */
		545	for (fd = 0; fd < anfdmax; ++fd)
		546	if (anfds [fd].events)
		547	{
		548	anfds [fd].events = 0;
		549	fd_change (EV_A_ fd);
		550	}
		551	}
		552
		553	/*****************************************************************************/
		554
		555	static void
		556	upheap (WT *heap, int k)
		557	{
		558	WT w = heap [k];
		559
		560	while (k && heap [k >> 1]->at > w->at)
		561	{
		562	heap [k] = heap [k >> 1];
		563	((W)heap [k])->active = k + 1;
		564	k >>= 1;
		565	}
		566
		567	heap [k] = w;
		568	((W)heap [k])->active = k + 1;
		569
		570	}
		571
		572	static void
		573	downheap (WT *heap, int N, int k)
		574	{
		575	WT w = heap [k];
		576
		577	while (k < (N >> 1))
		578	{
		579	int j = k << 1;
		580
		581	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		582	++j;
		583
		584	if (w->at <= heap [j]->at)
		585	break;
		586
		587	heap [k] = heap [j];
		588	((W)heap [k])->active = k + 1;
		589	k = j;
		590	}
		591
		592	heap [k] = w;
		593	((W)heap [k])->active = k + 1;
		594	}
		595
		596	inline void
		597	adjustheap (WT *heap, int N, int k)
		598	{
		599	upheap (heap, k);
		600	downheap (heap, N, k);
		601	}
		602
		603	/*****************************************************************************/
		604
		605	typedef struct
		606	{
		607	WL head;
		608	sig_atomic_t volatile gotsig;
		609	} ANSIG;
		610
		611	static ANSIG *signals;
		612	static int signalmax;
		613
		614	static int sigpipe [2];
		615	static sig_atomic_t volatile gotsig;
		616	static struct ev_io sigev;
		617
		618	static void
		619	signals_init (ANSIG *base, int count)
		620	{
		621	while (count--)
		622	{
		623	base->head = 0;
		624	base->gotsig = 0;
		625
		626	++base;
		627	}
		628	}
		629
		630	static void
		631	sighandler (int signum)
		632	{
		633	#if _WIN32
		634	signal (signum, sighandler);
		635	#endif
		636
		637	signals [signum - 1].gotsig = 1;
		638
		639	if (!gotsig)
		640	{
		641	int old_errno = errno;
		642	gotsig = 1;
		643	write (sigpipe [1], &signum, 1);
		644	errno = old_errno;
		645	}
		646	}
		647
		648	void
		649	ev_feed_signal_event (EV_P_ int signum)
		650	{
		651	WL w;
		652
		653	#if EV_MULTIPLICITY
		654	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		655	#endif
		656
		657	--signum;
		658
		659	if (signum < 0 || signum >= signalmax)
		660	return;
		661
		662	signals [signum].gotsig = 0;
		663
		664	for (w = signals [signum].head; w; w = w->next)
		665	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		666	}
		667
		668	static void
		669	sigcb (EV_P_ struct ev_io *iow, int revents)
		670	{
		671	int signum;
		672
		673	read (sigpipe [0], &revents, 1);
		674	gotsig = 0;
		675
		676	for (signum = signalmax; signum--; )
		677	if (signals [signum].gotsig)
		678	ev_feed_signal_event (EV_A_ signum + 1);
		679	}
		680
		681	static void
		682	fd_intern (int fd)
		683	{
		684	#ifdef _WIN32
		685	int arg = 1;
		686	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		687	#else
		688	fcntl (fd, F_SETFD, FD_CLOEXEC);
		689	fcntl (fd, F_SETFL, O_NONBLOCK);
		690	#endif
		691	}
		692
		693	static void
		694	siginit (EV_P)
		695	{
		696	fd_intern (sigpipe [0]);
		697	fd_intern (sigpipe [1]);
		698
		699	ev_io_set (&sigev, sigpipe [0], EV_READ);
		700	ev_io_start (EV_A_ &sigev);
		701	ev_unref (EV_A); /* child watcher should not keep loop alive */
		702	}
		703
		704	/*****************************************************************************/
		705
		706	static struct ev_child *childs [PID_HASHSIZE];
		707
		708	#ifndef _WIN32
		709
		710	static struct ev_signal childev;
		711
		712	#ifndef WCONTINUED
		713	# define WCONTINUED 0
		714	#endif
		715
		716	static void
		717	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		718	{
		719	struct ev_child *w;
		720
		721	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		722	if (w->pid == pid || !w->pid)
		723	{
		724	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		725	w->rpid = pid;
		726	w->rstatus = status;
		727	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		728	}
		729	}
		730
		731	static void
		732	childcb (EV_P_ struct ev_signal *sw, int revents)
		733	{
		734	int pid, status;
		735
		736	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		737	{
		738	/* make sure we are called again until all childs have been reaped */
		739	/* we need to do it this way so that the callback gets called before we continue */
		740	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		741
		742	child_reap (EV_A_ sw, pid, pid, status);
		743	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		744	}
		745	}
		746
		747	#endif
		748
		749	/*****************************************************************************/
		750
		751	#if EV_USE_PORT
		752	# include "ev_port.c"
		753	#endif
		754	#if EV_USE_KQUEUE
		755	# include "ev_kqueue.c"
		756	#endif
		757	#if EV_USE_EPOLL
		758	# include "ev_epoll.c"
		759	#endif
		760	#if EV_USE_POLL
		761	# include "ev_poll.c"
		762	#endif
		763	#if EV_USE_SELECT
		764	# include "ev_select.c"
		765	#endif
		766
		767	int
		768	ev_version_major (void)
		769	{
		770	return EV_VERSION_MAJOR;
		771	}
		772
		773	int
		774	ev_version_minor (void)
		775	{
		776	return EV_VERSION_MINOR;
		777	}
		778
		779	/* return true if we are running with elevated privileges and should ignore env variables */
		780	static int
		781	enable_secure (void)
		782	{
		783	#ifdef _WIN32
		784	return 0;
		785	#else
		786	return getuid () != geteuid ()
		787	|| getgid () != getegid ();
		788	#endif
		789	}
		790
		791	unsigned int
		792	ev_supported_backends (void)
		793	{
		794	unsigned int flags = 0;
		795
		796	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		797	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		798	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		799	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		800	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		801
		802	return flags;
		803	}
		804
		805	unsigned int
		806	ev_recommended_backends (void)
		807	{
		808	unsigned int flags = ev_supported_backends ();
		809
		810	#ifndef __NetBSD__
		811	/* kqueue is borked on everything but netbsd apparently */
		812	/* it usually doesn't work correctly on anything but sockets and pipes */
		813	flags &= ~EVBACKEND_KQUEUE;
		814	#endif
		815	#ifdef __APPLE__
		816	// flags &= ~EVBACKEND_KQUEUE; for documentation
		817	flags &= ~EVBACKEND_POLL;
		818	#endif
		819
		820	return flags;
		821	}
		822
		823	unsigned int
		824	ev_embeddable_backends (void)
		825	{
		826	return EVBACKEND_EPOLL
		827	| EVBACKEND_KQUEUE
		828	| EVBACKEND_PORT;
		829	}
		830
		831	unsigned int
		832	ev_backend (EV_P)
		833	{
		834	return backend;
		835	}
		836
		837	static void
		838	loop_init (EV_P_ unsigned int flags)
		839	{
		840	if (!backend)
		841	{
		842	#if EV_USE_MONOTONIC
		843	{
		844	struct timespec ts;
		845	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		846	have_monotonic = 1;
		847	}
		848	#endif
		849
		850	ev_rt_now = ev_time ();
		851	mn_now = get_clock ();
		852	now_floor = mn_now;
		853	rtmn_diff = ev_rt_now - mn_now;
		854
		855	if (!(flags & EVFLAG_NOENV)
		856	&& !enable_secure ()
		857	&& getenv ("LIBEV_FLAGS"))
		858	flags = atoi (getenv ("LIBEV_FLAGS"));
		859
		860	if (!(flags & 0x0000ffffUL))
		861	flags |= ev_recommended_backends ();
		862
		863	backend = 0;
		864	#if EV_USE_PORT
		865	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		866	#endif
		867	#if EV_USE_KQUEUE
		868	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		869	#endif
		870	#if EV_USE_EPOLL
		871	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		872	#endif
		873	#if EV_USE_POLL
		874	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		875	#endif
		876	#if EV_USE_SELECT
		877	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		878	#endif
		879
		880	ev_init (&sigev, sigcb);
		881	ev_set_priority (&sigev, EV_MAXPRI);
		882	}
		883	}
		884
		885	static void
		886	loop_destroy (EV_P)
420	{	887	{
421	int i;	888	int i;
422		889
423	for (i = 0; i < pendingcnt; ++i)	890	#if EV_USE_PORT
		891	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		892	#endif
		893	#if EV_USE_KQUEUE
		894	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		895	#endif
		896	#if EV_USE_EPOLL
		897	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		898	#endif
		899	#if EV_USE_POLL
		900	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		901	#endif
		902	#if EV_USE_SELECT
		903	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		904	#endif
		905
		906	for (i = NUMPRI; i--; )
		907	array_free (pending, [i]);
		908
		909	/* have to use the microsoft-never-gets-it-right macro */
		910	array_free (fdchange, EMPTY0);
		911	array_free (timer, EMPTY0);
		912	#if EV_PERIODICS
		913	array_free (periodic, EMPTY0);
		914	#endif
		915	array_free (idle, EMPTY0);
		916	array_free (prepare, EMPTY0);
		917	array_free (check, EMPTY0);
		918
		919	backend = 0;
		920	}
		921
		922	static void
		923	loop_fork (EV_P)
		924	{
		925	#if EV_USE_PORT
		926	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		927	#endif
		928	#if EV_USE_KQUEUE
		929	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		930	#endif
		931	#if EV_USE_EPOLL
		932	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		933	#endif
		934
		935	if (ev_is_active (&sigev))
		936	{
		937	/* default loop */
		938
		939	ev_ref (EV_A);
		940	ev_io_stop (EV_A_ &sigev);
		941	close (sigpipe [0]);
		942	close (sigpipe [1]);
		943
		944	while (pipe (sigpipe))
		945	syserr ("(libev) error creating pipe");
		946
		947	siginit (EV_A);
424	{	948	}
425	ANPENDING *p = pendings + i;
426		949
427	if (p->w)	950	postfork = 0;
		951	}
		952
		953	#if EV_MULTIPLICITY
		954	struct ev_loop *
		955	ev_loop_new (unsigned int flags)
		956	{
		957	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		958
		959	memset (loop, 0, sizeof (struct ev_loop));
		960
		961	loop_init (EV_A_ flags);
		962
		963	if (ev_backend (EV_A))
		964	return loop;
		965
		966	return 0;
		967	}
		968
		969	void
		970	ev_loop_destroy (EV_P)
		971	{
		972	loop_destroy (EV_A);
		973	ev_free (loop);
		974	}
		975
		976	void
		977	ev_loop_fork (EV_P)
		978	{
		979	postfork = 1;
		980	}
		981
		982	#endif
		983
		984	#if EV_MULTIPLICITY
		985	struct ev_loop *
		986	ev_default_loop_init (unsigned int flags)
		987	#else
		988	int
		989	ev_default_loop (unsigned int flags)
		990	#endif
		991	{
		992	if (sigpipe [0] == sigpipe [1])
		993	if (pipe (sigpipe))
		994	return 0;
		995
		996	if (!ev_default_loop_ptr)
		997	{
		998	#if EV_MULTIPLICITY
		999	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1000	#else
		1001	ev_default_loop_ptr = 1;
		1002	#endif
		1003
		1004	loop_init (EV_A_ flags);
		1005
		1006	if (ev_backend (EV_A))
428	{	1007	{
429	p->w->pending = 0;	1008	siginit (EV_A);
430	p->w->cb (p->w, p->events);	1009
		1010	#ifndef _WIN32
		1011	ev_signal_init (&childev, childcb, SIGCHLD);
		1012	ev_set_priority (&childev, EV_MAXPRI);
		1013	ev_signal_start (EV_A_ &childev);
		1014	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1015	#endif
431	}	1016	}
		1017	else
		1018	ev_default_loop_ptr = 0;
		1019	}
		1020
		1021	return ev_default_loop_ptr;
		1022	}
		1023
		1024	void
		1025	ev_default_destroy (void)
		1026	{
		1027	#if EV_MULTIPLICITY
		1028	struct ev_loop *loop = ev_default_loop_ptr;
		1029	#endif
		1030
		1031	#ifndef _WIN32
		1032	ev_ref (EV_A); /* child watcher */
		1033	ev_signal_stop (EV_A_ &childev);
		1034	#endif
		1035
		1036	ev_ref (EV_A); /* signal watcher */
		1037	ev_io_stop (EV_A_ &sigev);
		1038
		1039	close (sigpipe [0]); sigpipe [0] = 0;
		1040	close (sigpipe [1]); sigpipe [1] = 0;
		1041
		1042	loop_destroy (EV_A);
		1043	}
		1044
		1045	void
		1046	ev_default_fork (void)
		1047	{
		1048	#if EV_MULTIPLICITY
		1049	struct ev_loop *loop = ev_default_loop_ptr;
		1050	#endif
		1051
		1052	if (backend)
		1053	postfork = 1;
		1054	}
		1055
		1056	/*****************************************************************************/
		1057
		1058	static int
		1059	any_pending (EV_P)
		1060	{
		1061	int pri;
		1062
		1063	for (pri = NUMPRI; pri--; )
		1064	if (pendingcnt [pri])
		1065	return 1;
		1066
		1067	return 0;
		1068	}
		1069
		1070	inline void
		1071	call_pending (EV_P)
		1072	{
		1073	int pri;
		1074
		1075	for (pri = NUMPRI; pri--; )
		1076	while (pendingcnt [pri])
		1077	{
		1078	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1079
		1080	if (expect_true (p->w))
		1081	{
		1082	p->w->pending = 0;
		1083	EV_CB_INVOKE (p->w, p->events);
		1084	}
432	}	1085	}
433
434	pendingcnt = 0;
435	}	1086	}
436		1087
437	static void	1088	inline void
438	timers_reify ()	1089	timers_reify (EV_P)
439	{	1090	{
440	while (timercnt && timers [0]->at <= now)	1091	while (timercnt && ((WT)timers [0])->at <= mn_now)
441	{	1092	{
442	struct ev_timer *w = timers [0];	1093	struct ev_timer *w = timers [0];
443		1094
444	event ((W)w, EV_TIMEOUT);	1095	assert (("inactive timer on timer heap detected", ev_is_active (w)));
445		1096
446	/* first reschedule or stop timer */	1097	/* first reschedule or stop timer */
447	if (w->repeat)	1098	if (w->repeat)
448	{	1099	{
		1100	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1101
449	w->at = now + w->repeat;	1102	((WT)w)->at += w->repeat;
450	assert (("timer timeout in the past, negative repeat?", w->at > now));	1103	if (((WT)w)->at < mn_now)
		1104	((WT)w)->at = mn_now;
		1105
451	downheap ((WT *)timers, timercnt, 0);	1106	downheap ((WT *)timers, timercnt, 0);
452	}	1107	}
453	else	1108	else
454	evtimer_stop (w); /* nonrepeating: stop timer */	1109	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
455	}
456	}
457		1110
458	static void	1111	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1112	}
		1113	}
		1114
		1115	#if EV_PERIODICS
		1116	inline void
459	periodics_reify ()	1117	periodics_reify (EV_P)
460	{	1118	{
461	while (periodiccnt && periodics [0]->at <= ev_now)	1119	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
462	{	1120	{
463	struct ev_periodic *w = periodics [0];	1121	struct ev_periodic *w = periodics [0];
464		1122
		1123	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1124
465	/* first reschedule or stop timer */	1125	/* first reschedule or stop timer */
466	if (w->interval)	1126	if (w->reschedule_cb)
467	{	1127	{
		1128	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1129	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1130	downheap ((WT *)periodics, periodiccnt, 0);
		1131	}
		1132	else if (w->interval)
		1133	{
468	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1134	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
469	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1135	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
470	downheap ((WT *)periodics, periodiccnt, 0);	1136	downheap ((WT *)periodics, periodiccnt, 0);
471	}	1137	}
472	else	1138	else
473	evperiodic_stop (w); /* nonrepeating: stop timer */	1139	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
474		1140
475	event ((W)w, EV_TIMEOUT);	1141	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
476	}	1142	}
477	}	1143	}
478		1144
479	static void	1145	static void
480	periodics_reschedule (ev_tstamp diff)	1146	periodics_reschedule (EV_P)
481	{	1147	{
482	int i;	1148	int i;
483		1149
484	/* adjust periodics after time jump */	1150	/* adjust periodics after time jump */
485	for (i = 0; i < periodiccnt; ++i)	1151	for (i = 0; i < periodiccnt; ++i)
486	{	1152	{
487	struct ev_periodic *w = periodics [i];	1153	struct ev_periodic *w = periodics [i];
488		1154
		1155	if (w->reschedule_cb)
		1156	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
489	if (w->interval)	1157	else if (w->interval)
		1158	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1159	}
		1160
		1161	/* now rebuild the heap */
		1162	for (i = periodiccnt >> 1; i--; )
		1163	downheap ((WT *)periodics, periodiccnt, i);
		1164	}
		1165	#endif
		1166
		1167	inline int
		1168	time_update_monotonic (EV_P)
		1169	{
		1170	mn_now = get_clock ();
		1171
		1172	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1173	{
		1174	ev_rt_now = rtmn_diff + mn_now;
		1175	return 0;
		1176	}
		1177	else
		1178	{
		1179	now_floor = mn_now;
		1180	ev_rt_now = ev_time ();
		1181	return 1;
		1182	}
		1183	}
		1184
		1185	inline void
		1186	time_update (EV_P)
		1187	{
		1188	int i;
		1189
		1190	#if EV_USE_MONOTONIC
		1191	if (expect_true (have_monotonic))
		1192	{
		1193	if (time_update_monotonic (EV_A))
490	{	1194	{
491	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1195	ev_tstamp odiff = rtmn_diff;
492		1196
493	if (fabs (diff) >= 1e-4)	1197	for (i = 4; --i; ) /* loop a few times, before making important decisions */
494	{	1198	{
495	evperiodic_stop (w);	1199	rtmn_diff = ev_rt_now - mn_now;
496	evperiodic_start (w);
497		1200
498	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1201	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1202	return; /* all is well */
		1203
		1204	ev_rt_now = ev_time ();
		1205	mn_now = get_clock ();
		1206	now_floor = mn_now;
499	}	1207	}
		1208
		1209	# if EV_PERIODICS
		1210	periodics_reschedule (EV_A);
		1211	# endif
		1212	/* no timer adjustment, as the monotonic clock doesn't jump */
		1213	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
500	}	1214	}
501	}	1215	}
502	}	1216	else
503		1217	#endif
504	static void	1218	{
505	time_update ()
506	{
507	int i;
508
509	ev_now = ev_time ();	1219	ev_rt_now = ev_time ();
510		1220
511	if (have_monotonic)	1221	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
512	{
513	ev_tstamp odiff = diff;
514
515	for (i = 4; --i; ) /* loop a few times, before making important decisions */
516	{	1222	{
517	now = get_clock ();	1223	#if EV_PERIODICS
518	diff = ev_now - now;
519
520	if (fabs (odiff - diff) < MIN_TIMEJUMP)
521	return; /* all is well */
522
523	ev_now = ev_time ();
524	}
525
526	periodics_reschedule (diff - odiff);
527	/* no timer adjustment, as the monotonic clock doesn't jump */
528	}
529	else
530	{
531	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
532	{
533	periodics_reschedule (ev_now - now);	1224	periodics_reschedule (EV_A);
		1225	#endif
534		1226
535	/* adjust timers. this is easy, as the offset is the same for all */	1227	/* adjust timers. this is easy, as the offset is the same for all */
536	for (i = 0; i < timercnt; ++i)	1228	for (i = 0; i < timercnt; ++i)
537	timers [i]->at += diff;	1229	((WT)timers [i])->at += ev_rt_now - mn_now;
538	}	1230	}
539		1231
540	now = ev_now;	1232	mn_now = ev_rt_now;
541	}
542	}
543
544	int ev_loop_done;
545
546	void ev_loop (int flags)
547	{
548	double block;
549	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
550
551	if (checkcnt)
552	{	1233	}
553	queue_events ((W *)checks, checkcnt, EV_CHECK);	1234	}
		1235
		1236	void
		1237	ev_ref (EV_P)
		1238	{
		1239	++activecnt;
		1240	}
		1241
		1242	void
		1243	ev_unref (EV_P)
		1244	{
		1245	--activecnt;
		1246	}
		1247
		1248	static int loop_done;
		1249
		1250	void
		1251	ev_loop (EV_P_ int flags)
		1252	{
		1253	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1254	? EVUNLOOP_ONE
		1255	: EVUNLOOP_CANCEL;
		1256
		1257	while (activecnt)
		1258	{
		1259	/* queue check watchers (and execute them) */
		1260	if (expect_false (preparecnt))
		1261	{
		1262	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
554	call_pending ();	1263	call_pending (EV_A);
555	}	1264	}
556		1265
557	do	1266	/* we might have forked, so reify kernel state if necessary */
558	{	1267	if (expect_false (postfork))
		1268	loop_fork (EV_A);
		1269
559	/* update fd-related kernel structures */	1270	/* update fd-related kernel structures */
560	fd_reify ();	1271	fd_reify (EV_A);
561		1272
562	/* calculate blocking time */	1273	/* calculate blocking time */
		1274	{
		1275	double block;
563		1276
564	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
565	ev_now = ev_time ();
566
567	if (flags & EVLOOP_NONBLOCK || idlecnt)	1277	if (flags & EVLOOP_NONBLOCK || idlecnt)
568	block = 0.;	1278	block = 0.; /* do not block at all */
569	else	1279	else
570	{	1280	{
		1281	/* update time to cancel out callback processing overhead */
		1282	#if EV_USE_MONOTONIC
		1283	if (expect_true (have_monotonic))
		1284	time_update_monotonic (EV_A);
		1285	else
		1286	#endif
		1287	{
		1288	ev_rt_now = ev_time ();
		1289	mn_now = ev_rt_now;
		1290	}
		1291
571	block = MAX_BLOCKTIME;	1292	block = MAX_BLOCKTIME;
572		1293
573	if (timercnt)	1294	if (timercnt)
574	{	1295	{
575	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1296	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
576	if (block > to) block = to;	1297	if (block > to) block = to;
577	}	1298	}
578		1299
		1300	#if EV_PERIODICS
579	if (periodiccnt)	1301	if (periodiccnt)
580	{	1302	{
581	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1303	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
582	if (block > to) block = to;	1304	if (block > to) block = to;
583	}	1305	}
		1306	#endif
584		1307
585	if (block < 0.) block = 0.;	1308	if (expect_false (block < 0.)) block = 0.;
586	}	1309	}
587		1310
588	method_poll (block);	1311	backend_poll (EV_A_ block);
		1312	}
589		1313
590	/* update ev_now, do magic */	1314	/* update ev_rt_now, do magic */
591	time_update ();	1315	time_update (EV_A);
592		1316
593	/* queue pending timers and reschedule them */	1317	/* queue pending timers and reschedule them */
		1318	timers_reify (EV_A); /* relative timers called last */
		1319	#if EV_PERIODICS
594	periodics_reify (); /* absolute timers first */	1320	periodics_reify (EV_A); /* absolute timers called first */
595	timers_reify (); /* relative timers second */	1321	#endif
596		1322
597	/* queue idle watchers unless io or timers are pending */	1323	/* queue idle watchers unless io or timers are pending */
598	if (!pendingcnt)	1324	if (idlecnt && !any_pending (EV_A))
599	queue_events ((W *)idles, idlecnt, EV_IDLE);	1325	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
600		1326
601	/* queue check and possibly idle watchers */	1327	/* queue check watchers, to be executed first */
		1328	if (expect_false (checkcnt))
602	queue_events ((W *)checks, checkcnt, EV_CHECK);	1329	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
603		1330
604	call_pending ();	1331	call_pending (EV_A);
605	}
606	while (!ev_loop_done);
607		1332
608	if (ev_loop_done != 2)	1333	if (expect_false (loop_done))
		1334	break;
		1335	}
		1336
		1337	if (loop_done == EVUNLOOP_ONE)
		1338	loop_done = EVUNLOOP_CANCEL;
		1339	}
		1340
		1341	void
		1342	ev_unloop (EV_P_ int how)
		1343	{
609	ev_loop_done = 0;	1344	loop_done = how;
610	}	1345	}
611		1346
612	/*****************************************************************************/	1347	/*****************************************************************************/
613		1348
614	static void	1349	inline void
615	wlist_add (WL *head, WL elem)	1350	wlist_add (WL *head, WL elem)
616	{	1351	{
617	elem->next = *head;	1352	elem->next = *head;
618	*head = elem;	1353	*head = elem;
619	}	1354	}
620		1355
621	static void	1356	inline void
622	wlist_del (WL *head, WL elem)	1357	wlist_del (WL *head, WL elem)
623	{	1358	{
624	while (*head)	1359	while (*head)
625	{	1360	{
626	if (*head == elem)	1361	if (*head == elem)
…		…
631		1366
632	head = &(*head)->next;	1367	head = &(*head)->next;
633	}	1368	}
634	}	1369	}
635		1370
636	static void	1371	inline void
637	ev_clear (W w)	1372	ev_clear_pending (EV_P_ W w)
638	{	1373	{
639	if (w->pending)	1374	if (w->pending)
640	{	1375	{
641	pendings [w->pending - 1].w = 0;	1376	pendings [ABSPRI (w)][w->pending - 1].w = 0;
642	w->pending = 0;	1377	w->pending = 0;
643	}	1378	}
644	}	1379	}
645		1380
646	static void	1381	inline void
647	ev_start (W w, int active)	1382	ev_start (EV_P_ W w, int active)
648	{	1383	{
		1384	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1385	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1386
649	w->active = active;	1387	w->active = active;
		1388	ev_ref (EV_A);
650	}	1389	}
651		1390
652	static void	1391	inline void
653	ev_stop (W w)	1392	ev_stop (EV_P_ W w)
654	{	1393	{
		1394	ev_unref (EV_A);
655	w->active = 0;	1395	w->active = 0;
656	}	1396	}
657		1397
658	/*****************************************************************************/	1398	/*****************************************************************************/
659		1399
660	void	1400	void
661	evio_start (struct ev_io *w)	1401	ev_io_start (EV_P_ struct ev_io *w)
662	{	1402	{
663	if (ev_is_active (w))
664	return;
665
666	int fd = w->fd;	1403	int fd = w->fd;
667		1404
		1405	if (expect_false (ev_is_active (w)))
		1406	return;
		1407
		1408	assert (("ev_io_start called with negative fd", fd >= 0));
		1409
668	ev_start ((W)w, 1);	1410	ev_start (EV_A_ (W)w, 1);
669	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1411	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
670	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1412	wlist_add ((WL *)&anfds[fd].head, (WL)w);
671		1413
672	++fdchangecnt;	1414	fd_change (EV_A_ fd);
673	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
674	fdchanges [fdchangecnt - 1] = fd;
675	}	1415	}
676		1416
677	void	1417	void
678	evio_stop (struct ev_io *w)	1418	ev_io_stop (EV_P_ struct ev_io *w)
679	{	1419	{
680	ev_clear ((W)w);	1420	ev_clear_pending (EV_A_ (W)w);
681	if (!ev_is_active (w))	1421	if (expect_false (!ev_is_active (w)))
682	return;	1422	return;
		1423
		1424	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
683		1425
684	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1426	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
685	ev_stop ((W)w);	1427	ev_stop (EV_A_ (W)w);
686		1428
687	++fdchangecnt;	1429	fd_change (EV_A_ w->fd);
688	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
689	fdchanges [fdchangecnt - 1] = w->fd;
690	}	1430	}
691		1431
692	void	1432	void
693	evtimer_start (struct ev_timer *w)	1433	ev_timer_start (EV_P_ struct ev_timer *w)
694	{	1434	{
695	if (ev_is_active (w))	1435	if (expect_false (ev_is_active (w)))
696	return;	1436	return;
697		1437
698	w->at += now;	1438	((WT)w)->at += mn_now;
699		1439
700	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1440	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
701		1441
702	ev_start ((W)w, ++timercnt);	1442	ev_start (EV_A_ (W)w, ++timercnt);
703	array_needsize (timers, timermax, timercnt, );	1443	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
704	timers [timercnt - 1] = w;	1444	timers [timercnt - 1] = w;
705	upheap ((WT *)timers, timercnt - 1);	1445	upheap ((WT *)timers, timercnt - 1);
706	}
707		1446
		1447	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1448	}
		1449
708	void	1450	void
709	evtimer_stop (struct ev_timer *w)	1451	ev_timer_stop (EV_P_ struct ev_timer *w)
710	{	1452	{
711	ev_clear ((W)w);	1453	ev_clear_pending (EV_A_ (W)w);
712	if (!ev_is_active (w))	1454	if (expect_false (!ev_is_active (w)))
713	return;	1455	return;
714		1456
		1457	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1458
715	if (w->active < timercnt--)	1459	if (expect_true (((W)w)->active < timercnt--))
716	{	1460	{
717	timers [w->active - 1] = timers [timercnt];	1461	timers [((W)w)->active - 1] = timers [timercnt];
718	downheap ((WT *)timers, timercnt, w->active - 1);	1462	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
719	}	1463	}
720		1464
721	w->at = w->repeat;	1465	((WT)w)->at -= mn_now;
722		1466
723	ev_stop ((W)w);	1467	ev_stop (EV_A_ (W)w);
724	}	1468	}
725		1469
726	void	1470	void
727	evtimer_again (struct ev_timer *w)	1471	ev_timer_again (EV_P_ struct ev_timer *w)
728	{	1472	{
729	if (ev_is_active (w))	1473	if (ev_is_active (w))
730	{	1474	{
731	if (w->repeat)	1475	if (w->repeat)
732	{	1476	{
733	w->at = now + w->repeat;	1477	((WT)w)->at = mn_now + w->repeat;
734	downheap ((WT *)timers, timercnt, w->active - 1);	1478	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
735	}	1479	}
736	else	1480	else
737	evtimer_stop (w);	1481	ev_timer_stop (EV_A_ w);
738	}	1482	}
739	else if (w->repeat)	1483	else if (w->repeat)
		1484	{
		1485	w->at = w->repeat;
740	evtimer_start (w);	1486	ev_timer_start (EV_A_ w);
		1487	}
741	}	1488	}
742		1489
		1490	#if EV_PERIODICS
743	void	1491	void
744	evperiodic_start (struct ev_periodic *w)	1492	ev_periodic_start (EV_P_ struct ev_periodic *w)
745	{	1493	{
746	if (ev_is_active (w))	1494	if (expect_false (ev_is_active (w)))
747	return;	1495	return;
748		1496
749	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1497	if (w->reschedule_cb)
750		1498	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1499	else if (w->interval)
		1500	{
		1501	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
751	/* this formula differs from the one in periodic_reify because we do not always round up */	1502	/* this formula differs from the one in periodic_reify because we do not always round up */
752	if (w->interval)
753	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1503	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1504	}
754		1505
755	ev_start ((W)w, ++periodiccnt);	1506	ev_start (EV_A_ (W)w, ++periodiccnt);
756	array_needsize (periodics, periodicmax, periodiccnt, );	1507	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
757	periodics [periodiccnt - 1] = w;	1508	periodics [periodiccnt - 1] = w;
758	upheap ((WT *)periodics, periodiccnt - 1);	1509	upheap ((WT *)periodics, periodiccnt - 1);
759	}
760		1510
		1511	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1512	}
		1513
761	void	1514	void
762	evperiodic_stop (struct ev_periodic *w)	1515	ev_periodic_stop (EV_P_ struct ev_periodic *w)
763	{	1516	{
764	ev_clear ((W)w);	1517	ev_clear_pending (EV_A_ (W)w);
765	if (!ev_is_active (w))	1518	if (expect_false (!ev_is_active (w)))
766	return;	1519	return;
767		1520
		1521	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1522
768	if (w->active < periodiccnt--)	1523	if (expect_true (((W)w)->active < periodiccnt--))
769	{	1524	{
770	periodics [w->active - 1] = periodics [periodiccnt];	1525	periodics [((W)w)->active - 1] = periodics [periodiccnt];
771	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1526	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
772	}	1527	}
773		1528
774	ev_stop ((W)w);	1529	ev_stop (EV_A_ (W)w);
775	}	1530	}
776		1531
777	void	1532	void
		1533	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1534	{
		1535	/* TODO: use adjustheap and recalculation */
		1536	ev_periodic_stop (EV_A_ w);
		1537	ev_periodic_start (EV_A_ w);
		1538	}
		1539	#endif
		1540
		1541	void
		1542	ev_idle_start (EV_P_ struct ev_idle *w)
		1543	{
		1544	if (expect_false (ev_is_active (w)))
		1545	return;
		1546
		1547	ev_start (EV_A_ (W)w, ++idlecnt);
		1548	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1549	idles [idlecnt - 1] = w;
		1550	}
		1551
		1552	void
		1553	ev_idle_stop (EV_P_ struct ev_idle *w)
		1554	{
		1555	ev_clear_pending (EV_A_ (W)w);
		1556	if (expect_false (!ev_is_active (w)))
		1557	return;
		1558
		1559	idles [((W)w)->active - 1] = idles [--idlecnt];
		1560	ev_stop (EV_A_ (W)w);
		1561	}
		1562
		1563	void
		1564	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1565	{
		1566	if (expect_false (ev_is_active (w)))
		1567	return;
		1568
		1569	ev_start (EV_A_ (W)w, ++preparecnt);
		1570	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1571	prepares [preparecnt - 1] = w;
		1572	}
		1573
		1574	void
		1575	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1576	{
		1577	ev_clear_pending (EV_A_ (W)w);
		1578	if (expect_false (!ev_is_active (w)))
		1579	return;
		1580
		1581	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1582	ev_stop (EV_A_ (W)w);
		1583	}
		1584
		1585	void
		1586	ev_check_start (EV_P_ struct ev_check *w)
		1587	{
		1588	if (expect_false (ev_is_active (w)))
		1589	return;
		1590
		1591	ev_start (EV_A_ (W)w, ++checkcnt);
		1592	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1593	checks [checkcnt - 1] = w;
		1594	}
		1595
		1596	void
		1597	ev_check_stop (EV_P_ struct ev_check *w)
		1598	{
		1599	ev_clear_pending (EV_A_ (W)w);
		1600	if (expect_false (!ev_is_active (w)))
		1601	return;
		1602
		1603	checks [((W)w)->active - 1] = checks [--checkcnt];
		1604	ev_stop (EV_A_ (W)w);
		1605	}
		1606
		1607	#ifndef SA_RESTART
		1608	# define SA_RESTART 0
		1609	#endif
		1610
		1611	void
778	evsignal_start (struct ev_signal *w)	1612	ev_signal_start (EV_P_ struct ev_signal *w)
779	{	1613	{
		1614	#if EV_MULTIPLICITY
		1615	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1616	#endif
780	if (ev_is_active (w))	1617	if (expect_false (ev_is_active (w)))
781	return;	1618	return;
782		1619
		1620	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1621
783	ev_start ((W)w, 1);	1622	ev_start (EV_A_ (W)w, 1);
784	array_needsize (signals, signalmax, w->signum, signals_init);	1623	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
785	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1624	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
786		1625
787	if (!w->next)	1626	if (!((WL)w)->next)
788	{	1627	{
		1628	#if _WIN32
		1629	signal (w->signum, sighandler);
		1630	#else
789	struct sigaction sa;	1631	struct sigaction sa;
790	sa.sa_handler = sighandler;	1632	sa.sa_handler = sighandler;
791	sigfillset (&sa.sa_mask);	1633	sigfillset (&sa.sa_mask);
792	sa.sa_flags = 0;	1634	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
793	sigaction (w->signum, &sa, 0);	1635	sigaction (w->signum, &sa, 0);
		1636	#endif
794	}	1637	}
795	}	1638	}
796		1639
797	void	1640	void
798	evsignal_stop (struct ev_signal *w)	1641	ev_signal_stop (EV_P_ struct ev_signal *w)
799	{	1642	{
800	ev_clear ((W)w);	1643	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1644	if (expect_false (!ev_is_active (w)))
802	return;	1645	return;
803		1646
804	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1647	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
805	ev_stop ((W)w);	1648	ev_stop (EV_A_ (W)w);
806		1649
807	if (!signals [w->signum - 1].head)	1650	if (!signals [w->signum - 1].head)
808	signal (w->signum, SIG_DFL);	1651	signal (w->signum, SIG_DFL);
809	}	1652	}
810		1653
811	void evidle_start (struct ev_idle *w)	1654	void
		1655	ev_child_start (EV_P_ struct ev_child *w)
812	{	1656	{
		1657	#if EV_MULTIPLICITY
		1658	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1659	#endif
813	if (ev_is_active (w))	1660	if (expect_false (ev_is_active (w)))
814	return;	1661	return;
815		1662
816	ev_start ((W)w, ++idlecnt);	1663	ev_start (EV_A_ (W)w, 1);
817	array_needsize (idles, idlemax, idlecnt, );	1664	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
818	idles [idlecnt - 1] = w;
819	}	1665	}
820		1666
821	void evidle_stop (struct ev_idle *w)	1667	void
		1668	ev_child_stop (EV_P_ struct ev_child *w)
822	{	1669	{
823	ev_clear ((W)w);	1670	ev_clear_pending (EV_A_ (W)w);
824	if (ev_is_active (w))	1671	if (expect_false (!ev_is_active (w)))
825	return;	1672	return;
826		1673
827	idles [w->active - 1] = idles [--idlecnt];	1674	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
828	ev_stop ((W)w);	1675	ev_stop (EV_A_ (W)w);
829	}	1676	}
830		1677
831	void evcheck_start (struct ev_check *w)	1678	#if EV_MULTIPLICITY
		1679	static void
		1680	embed_cb (EV_P_ struct ev_io *io, int revents)
832	{	1681	{
		1682	struct ev_embed *w = (struct ev_embed *)(((char *)io) - offsetof (struct ev_embed, io));
		1683
		1684	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1685	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1686	}
		1687
		1688	void
		1689	ev_embed_start (EV_P_ struct ev_embed *w)
		1690	{
833	if (ev_is_active (w))	1691	if (expect_false (ev_is_active (w)))
834	return;	1692	return;
835		1693
836	ev_start ((W)w, ++checkcnt);	1694	{
837	array_needsize (checks, checkmax, checkcnt, );	1695	struct ev_loop *loop = w->loop;
838	checks [checkcnt - 1] = w;	1696	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
839	}	1697	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1698	}
840		1699
841	void evcheck_stop (struct ev_check *w)	1700	ev_io_start (EV_A_ &w->io);
842	{	1701	ev_start (EV_A_ (W)w, 1);
843	ev_clear ((W)w);	1702	}
844	if (ev_is_active (w))
845	return;
846		1703
847	checks [w->active - 1] = checks [--checkcnt];	1704	void
		1705	ev_embed_stop (EV_P_ struct ev_embed *w)
		1706	{
		1707	ev_clear_pending (EV_A_ (W)w);
		1708	if (expect_false (!ev_is_active (w)))
		1709	return;
		1710
		1711	ev_io_stop (EV_A_ &w->io);
848	ev_stop ((W)w);	1712	ev_stop (EV_A_ (W)w);
849	}	1713	}
		1714	#endif
850		1715
851	/*****************************************************************************/	1716	/*****************************************************************************/
852		1717
853	struct ev_once	1718	struct ev_once
854	{	1719	{
…		…
857	void (*cb)(int revents, void *arg);	1722	void (*cb)(int revents, void *arg);
858	void *arg;	1723	void *arg;
859	};	1724	};
860		1725
861	static void	1726	static void
862	once_cb (struct ev_once *once, int revents)	1727	once_cb (EV_P_ struct ev_once *once, int revents)
863	{	1728	{
864	void (*cb)(int revents, void *arg) = once->cb;	1729	void (*cb)(int revents, void *arg) = once->cb;
865	void *arg = once->arg;	1730	void *arg = once->arg;
866		1731
867	evio_stop (&once->io);	1732	ev_io_stop (EV_A_ &once->io);
868	evtimer_stop (&once->to);	1733	ev_timer_stop (EV_A_ &once->to);
869	free (once);	1734	ev_free (once);
870		1735
871	cb (revents, arg);	1736	cb (revents, arg);
872	}	1737	}
873		1738
874	static void	1739	static void
875	once_cb_io (struct ev_io *w, int revents)	1740	once_cb_io (EV_P_ struct ev_io *w, int revents)
876	{	1741	{
877	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1742	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
878	}	1743	}
879		1744
880	static void	1745	static void
881	once_cb_to (struct ev_timer *w, int revents)	1746	once_cb_to (EV_P_ struct ev_timer *w, int revents)
882	{	1747	{
883	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1748	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
884	}	1749	}
885		1750
886	void	1751	void
887	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1752	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
888	{	1753	{
889	struct ev_once *once = malloc (sizeof (struct ev_once));	1754	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
890		1755
891	if (!once)	1756	if (expect_false (!once))
892	cb (EV_ERROR, arg);	1757	{
893	else	1758	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1759	return;
894	{	1760	}
		1761
895	once->cb = cb;	1762	once->cb = cb;
896	once->arg = arg;	1763	once->arg = arg;
897		1764
898	evw_init (&once->io, once_cb_io);	1765	ev_init (&once->io, once_cb_io);
899
900	if (fd >= 0)	1766	if (fd >= 0)
901	{	1767	{
902	evio_set (&once->io, fd, events);	1768	ev_io_set (&once->io, fd, events);
903	evio_start (&once->io);	1769	ev_io_start (EV_A_ &once->io);
904	}	1770	}
905		1771
906	evw_init (&once->to, once_cb_to);	1772	ev_init (&once->to, once_cb_to);
907
908	if (timeout >= 0.)	1773	if (timeout >= 0.)
909	{	1774	{
910	evtimer_set (&once->to, timeout, 0.);	1775	ev_timer_set (&once->to, timeout, 0.);
911	evtimer_start (&once->to);	1776	ev_timer_start (EV_A_ &once->to);
912	}
913	}
914	}
915
916	/*****************************************************************************/
917
918	#if 0
919
920	struct ev_io wio;
921
922	static void
923	sin_cb (struct ev_io *w, int revents)
924	{
925	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
926	}
927
928	static void
929	ocb (struct ev_timer *w, int revents)
930	{
931	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
932	evtimer_stop (w);
933	evtimer_start (w);
934	}
935
936	static void
937	scb (struct ev_signal *w, int revents)
938	{
939	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
940	evio_stop (&wio);
941	evio_start (&wio);
942	}
943
944	static void
945	gcb (struct ev_signal *w, int revents)
946	{
947	fprintf (stderr, "generic %x\n", revents);
948
949	}
950
951	int main (void)
952	{
953	ev_init (0);
954
955	evio_init (&wio, sin_cb, 0, EV_READ);
956	evio_start (&wio);
957
958	struct ev_timer t[10000];
959
960	#if 0
961	int i;
962	for (i = 0; i < 10000; ++i)
963	{	1777	}
964	struct ev_timer *w = t + i;
965	evw_init (w, ocb, i);
966	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
967	evtimer_start (w);
968	if (drand48 () < 0.5)
969	evtimer_stop (w);
970	}
971	#endif
972
973	struct ev_timer t1;
974	evtimer_init (&t1, ocb, 5, 10);
975	evtimer_start (&t1);
976
977	struct ev_signal sig;
978	evsignal_init (&sig, scb, SIGQUIT);
979	evsignal_start (&sig);
980
981	struct ev_check cw;
982	evcheck_init (&cw, gcb);
983	evcheck_start (&cw);
984
985	struct ev_idle iw;
986	evidle_init (&iw, gcb);
987	evidle_start (&iw);
988
989	ev_loop (0);
990
991	return 0;
992	}	1778	}
993		1779
		1780	#ifdef __cplusplus
		1781	}
994	#endif	1782	#endif
995		1783
996
997
998

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