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Comparing libev/ev.c (file contents):
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC vs.
Revision 1.126 by root, Sun Nov 18 01:25:23 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# include "config.h"
		38
		39	# if HAVE_CLOCK_GETTIME
		40	# ifndef EV_USE_MONOTONIC
		41	# define EV_USE_MONOTONIC 1
		42	# endif
		43	# ifndef EV_USE_REALTIME
		44	# define EV_USE_REALTIME 1
		45	# endif
		46	# else
		47	# ifndef EV_USE_MONOTONIC
		48	# define EV_USE_MONOTONIC 0
		49	# endif
		50	# ifndef EV_USE_REALTIME
		51	# define EV_USE_REALTIME 0
		52	# endif
		53	# endif
		54
		55	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)
		56	# define EV_USE_SELECT 1
		57	# else
		58	# define EV_USE_SELECT 0
		59	# endif
		60
		61	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)
		62	# define EV_USE_POLL 1
		63	# else
		64	# define EV_USE_POLL 0
		65	# endif
		66
		67	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)
		68	# define EV_USE_EPOLL 1
		69	# else
		70	# define EV_USE_EPOLL 0
		71	# endif
		72
		73	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)
		74	# define EV_USE_KQUEUE 1
		75	# else
		76	# define EV_USE_KQUEUE 0
		77	# endif
		78
		79	# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT)
		80	# define EV_USE_PORT 1
		81	# else
		82	# define EV_USE_PORT 0
		83	# endif
		84
		85	#endif
		86
30	#include <math.h>	87	#include <math.h>
31	#include <stdlib.h>	88	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	89	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	90	#include <stddef.h>
36		91
37	#include <stdio.h>	92	#include <stdio.h>
38		93
39	#include <assert.h>	94	#include <assert.h>
40	#include <errno.h>	95	#include <errno.h>
41	#include <sys/types.h>	96	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	97	#include <time.h>
45		98
46	#ifndef HAVE_MONOTONIC	99	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	100
48	# define HAVE_MONOTONIC 1	101	#ifndef _WIN32
		102	# include <unistd.h>
		103	# include <sys/time.h>
		104	# include <sys/wait.h>
		105	#else
		106	# define WIN32_LEAN_AND_MEAN
		107	# include <windows.h>
		108	# ifndef EV_SELECT_IS_WINSOCKET
		109	# define EV_SELECT_IS_WINSOCKET 1
49	# endif	110	# endif
50	#endif	111	#endif
51		112
		113	/**/
		114
		115	#ifndef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
		119	#ifndef EV_USE_REALTIME
		120	# define EV_USE_REALTIME 0
		121	#endif
		122
52	#ifndef HAVE_SELECT	123	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	124	# define EV_USE_SELECT 1
		125	#endif
		126
		127	#ifndef EV_USE_POLL
		128	# ifdef _WIN32
		129	# define EV_USE_POLL 0
		130	# else
		131	# define EV_USE_POLL 1
54	#endif	132	# endif
		133	#endif
55		134
56	#ifndef HAVE_EPOLL	135	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	136	# define EV_USE_EPOLL 0
58	#endif	137	#endif
59		138
		139	#ifndef EV_USE_KQUEUE
		140	# define EV_USE_KQUEUE 0
		141	#endif
		142
		143	#ifndef EV_USE_PORT
		144	# define EV_USE_PORT 0
		145	#endif
		146
		147	/**/
		148
		149	/* darwin simply cannot be helped */
		150	#ifdef __APPLE__
		151	# undef EV_USE_POLL
		152	# undef EV_USE_KQUEUE
		153	#endif
		154
		155	#ifndef CLOCK_MONOTONIC
		156	# undef EV_USE_MONOTONIC
		157	# define EV_USE_MONOTONIC 0
		158	#endif
		159
60	#ifndef HAVE_REALTIME	160	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	161	# undef EV_USE_REALTIME
		162	# define EV_USE_REALTIME 0
62	#endif	163	#endif
		164
		165	#if EV_SELECT_IS_WINSOCKET
		166	# include <winsock.h>
		167	#endif
		168
		169	/**/
63		170
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	171	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	172	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	173	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		174	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
67		175
		176	#ifdef EV_H
		177	# include EV_H
		178	#else
68	#include "ev.h"	179	# include "ev.h"
		180	#endif
		181
		182	#if __GNUC__ >= 3
		183	# define expect(expr,value) __builtin_expect ((expr),(value))
		184	# define inline static inline
		185	#else
		186	# define expect(expr,value) (expr)
		187	# define inline static
		188	#endif
		189
		190	#define expect_false(expr) expect ((expr) != 0, 0)
		191	#define expect_true(expr) expect ((expr) != 0, 1)
		192
		193	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		194	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		195
		196	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		197	#define EMPTY2(a,b) /* used to suppress some warnings */
69		198
70	typedef struct ev_watcher *W;	199	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	200	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	201	typedef struct ev_watcher_time *WT;
73		202
74	static ev_tstamp now, diff; /* monotonic clock */	203	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		204
		205	#ifdef _WIN32
		206	# include "ev_win32.c"
		207	#endif
		208
		209	/*****************************************************************************/
		210
		211	static void (*syserr_cb)(const char *msg);
		212
		213	void ev_set_syserr_cb (void (*cb)(const char *msg))
		214	{
		215	syserr_cb = cb;
		216	}
		217
		218	static void
		219	syserr (const char *msg)
		220	{
		221	if (!msg)
		222	msg = "(libev) system error";
		223
		224	if (syserr_cb)
		225	syserr_cb (msg);
		226	else
		227	{
		228	perror (msg);
		229	abort ();
		230	}
		231	}
		232
		233	static void *(*alloc)(void *ptr, long size);
		234
		235	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		236	{
		237	alloc = cb;
		238	}
		239
		240	static void *
		241	ev_realloc (void *ptr, long size)
		242	{
		243	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		244
		245	if (!ptr && size)
		246	{
		247	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		248	abort ();
		249	}
		250
		251	return ptr;
		252	}
		253
		254	#define ev_malloc(size) ev_realloc (0, (size))
		255	#define ev_free(ptr) ev_realloc ((ptr), 0)
		256
		257	/*****************************************************************************/
		258
		259	typedef struct
		260	{
		261	WL head;
		262	unsigned char events;
		263	unsigned char reify;
		264	#if EV_SELECT_IS_WINSOCKET
		265	SOCKET handle;
		266	#endif
		267	} ANFD;
		268
		269	typedef struct
		270	{
		271	W w;
		272	int events;
		273	} ANPENDING;
		274
		275	#if EV_MULTIPLICITY
		276
		277	struct ev_loop
		278	{
		279	ev_tstamp ev_rt_now;
		280	#define ev_rt_now ((loop)->ev_rt_now)
		281	#define VAR(name,decl) decl;
		282	#include "ev_vars.h"
		283	#undef VAR
		284	};
		285	#include "ev_wrap.h"
		286
		287	static struct ev_loop default_loop_struct;
		288	struct ev_loop *ev_default_loop_ptr;
		289
		290	#else
		291
75	ev_tstamp ev_now;	292	ev_tstamp ev_rt_now;
76	int ev_method;	293	#define VAR(name,decl) static decl;
		294	#include "ev_vars.h"
		295	#undef VAR
77		296
78	static int have_monotonic; /* runtime */	297	static int ev_default_loop_ptr;
79		298
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	299	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		300
84	/*****************************************************************************/	301	/*****************************************************************************/
85		302
86	ev_tstamp	303	ev_tstamp
87	ev_time (void)	304	ev_time (void)
88	{	305	{
89	#if HAVE_REALTIME	306	#if EV_USE_REALTIME
90	struct timespec ts;	307	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	308	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	309	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	310	#else
94	struct timeval tv;	311	struct timeval tv;
95	gettimeofday (&tv, 0);	312	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	313	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	314	#endif
98	}	315	}
99		316
100	static ev_tstamp	317	inline ev_tstamp
101	get_clock (void)	318	get_clock (void)
102	{	319	{
103	#if HAVE_MONOTONIC	320	#if EV_USE_MONOTONIC
104	if (have_monotonic)	321	if (expect_true (have_monotonic))
105	{	322	{
106	struct timespec ts;	323	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	324	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	325	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	326	}
110	#endif	327	#endif
111		328
112	return ev_time ();	329	return ev_time ();
113	}	330	}
114		331
		332	#if EV_MULTIPLICITY
		333	ev_tstamp
		334	ev_now (EV_P)
		335	{
		336	return ev_rt_now;
		337	}
		338	#endif
		339
		340	#define array_roundsize(type,n) (((n) | 4) & ~3)
		341
115	#define array_needsize(base,cur,cnt,init) \	342	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	343	if (expect_false ((cnt) > cur)) \
117	{ \	344	{ \
118	int newcnt = cur ? cur << 1 : 16; \	345	int newcnt = cur; \
		346	do \
		347	{ \
		348	newcnt = array_roundsize (type, newcnt << 1); \
		349	} \
		350	while ((cnt) > newcnt); \
		351	\
119	base = realloc (base, sizeof (*base) * (newcnt)); \	352	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
120	init (base + cur, newcnt - cur); \	353	init (base + cur, newcnt - cur); \
121	cur = newcnt; \	354	cur = newcnt; \
122	}	355	}
		356
		357	#define array_slim(type,stem) \
		358	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		359	{ \
		360	stem ## max = array_roundsize (stem ## cnt >> 1); \
		361	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		362	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		363	}
		364
		365	#define array_free(stem, idx) \
		366	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
123		367
124	/*****************************************************************************/	368	/*****************************************************************************/
125		369
126	typedef struct
127	{
128	struct ev_io *head;
129	unsigned char wev, rev; /* want, received event set */
130	} ANFD;
131
132	static ANFD *anfds;
133	static int anfdmax;
134
135	static int *fdchanges;
136	static int fdchangemax, fdchangecnt;
137
138	static void	370	static void
139	anfds_init (ANFD *base, int count)	371	anfds_init (ANFD *base, int count)
140	{	372	{
141	while (count--)	373	while (count--)
142	{	374	{
143	base->head = 0;	375	base->head = 0;
144	base->wev = base->rev = EV_NONE;	376	base->events = EV_NONE;
		377	base->reify = 0;
		378
145	++base;	379	++base;
146	}	380	}
147	}	381	}
148		382
149	typedef struct	383	void
		384	ev_feed_event (EV_P_ void *w, int revents)
150	{	385	{
151	W w;	386	W w_ = (W)w;
152	int events;
153	} ANPENDING;
154		387
155	static ANPENDING *pendings;	388	if (expect_false (w_->pending))
156	static int pendingmax, pendingcnt;
157
158	static void
159	event (W w, int events)
160	{
161	if (w->active)
162	{	389	{
163	w->pending = ++pendingcnt;
164	array_needsize (pendings, pendingmax, pendingcnt, );
165	pendings [pendingcnt - 1].w = w;
166	pendings [pendingcnt - 1].events = events;	390	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		391	return;
167	}	392	}
168	}
169		393
		394	w_->pending = ++pendingcnt [ABSPRI (w_)];
		395	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		396	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		397	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		398	}
		399
170	static void	400	static void
		401	queue_events (EV_P_ W *events, int eventcnt, int type)
		402	{
		403	int i;
		404
		405	for (i = 0; i < eventcnt; ++i)
		406	ev_feed_event (EV_A_ events [i], type);
		407	}
		408
		409	inline void
171	fd_event (int fd, int events)	410	fd_event (EV_P_ int fd, int revents)
172	{	411	{
173	ANFD *anfd = anfds + fd;	412	ANFD *anfd = anfds + fd;
174	struct ev_io *w;	413	struct ev_io *w;
175		414
176	for (w = anfd->head; w; w = w->next)	415	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
177	{	416	{
178	int ev = w->events & events;	417	int ev = w->events & revents;
179		418
180	if (ev)	419	if (ev)
181	event ((W)w, ev);	420	ev_feed_event (EV_A_ (W)w, ev);
182	}	421	}
183	}	422	}
184		423
185	static void	424	void
186	queue_events (W *events, int eventcnt, int type)	425	ev_feed_fd_event (EV_P_ int fd, int revents)
187	{	426	{
188	int i;	427	fd_event (EV_A_ fd, revents);
189
190	for (i = 0; i < eventcnt; ++i)
191	event (events [i], type);
192	}
193
194	/* called on EBADF to verify fds */
195	static void
196	fd_recheck ()
197	{
198	int fd;
199
200	for (fd = 0; fd < anfdmax; ++fd)
201	if (anfds [fd].wev)
202	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
203	while (anfds [fd].head)
204	evio_stop (anfds [fd].head);
205	}	428	}
206		429
207	/*****************************************************************************/	430	/*****************************************************************************/
208		431
209	static struct ev_timer **timers;	432	inline void
210	static int timermax, timercnt;	433	fd_reify (EV_P)
211
212	static struct ev_periodic **periodics;
213	static int periodicmax, periodiccnt;
214
215	static void
216	upheap (WT *timers, int k)
217	{
218	WT w = timers [k];
219
220	while (k && timers [k >> 1]->at > w->at)
221	{
222	timers [k] = timers [k >> 1];
223	timers [k]->active = k + 1;
224	k >>= 1;
225	}
226
227	timers [k] = w;
228	timers [k]->active = k + 1;
229
230	}
231
232	static void
233	downheap (WT *timers, int N, int k)
234	{
235	WT w = timers [k];
236
237	while (k < (N >> 1))
238	{
239	int j = k << 1;
240
241	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
242	++j;
243
244	if (w->at <= timers [j]->at)
245	break;
246
247	timers [k] = timers [j];
248	timers [k]->active = k + 1;
249	k = j;
250	}
251
252	timers [k] = w;
253	timers [k]->active = k + 1;
254	}
255
256	/*****************************************************************************/
257
258	typedef struct
259	{
260	struct ev_signal *head;
261	sig_atomic_t gotsig;
262	} ANSIG;
263
264	static ANSIG *signals;
265	static int signalmax;
266
267	static int sigpipe [2];
268	static sig_atomic_t gotsig;
269	static struct ev_io sigev;
270
271	static void
272	signals_init (ANSIG *base, int count)
273	{
274	while (count--)
275	{
276	base->head = 0;
277	base->gotsig = 0;
278	++base;
279	}
280	}
281
282	static void
283	sighandler (int signum)
284	{
285	signals [signum - 1].gotsig = 1;
286
287	if (!gotsig)
288	{
289	gotsig = 1;
290	write (sigpipe [1], &gotsig, 1);
291	}
292	}
293
294	static void
295	sigcb (struct ev_io *iow, int revents)
296	{
297	struct ev_signal *w;
298	int sig;
299
300	gotsig = 0;
301	read (sigpipe [0], &revents, 1);
302
303	for (sig = signalmax; sig--; )
304	if (signals [sig].gotsig)
305	{
306	signals [sig].gotsig = 0;
307
308	for (w = signals [sig].head; w; w = w->next)
309	event ((W)w, EV_SIGNAL);
310	}
311	}
312
313	static void
314	siginit (void)
315	{
316	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
317	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
318
319	/* rather than sort out wether we really need nb, set it */
320	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
321	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
322
323	evio_set (&sigev, sigpipe [0], EV_READ);
324	evio_start (&sigev);
325	}
326
327	/*****************************************************************************/
328
329	static struct ev_idle **idles;
330	static int idlemax, idlecnt;
331
332	static struct ev_prepare **prepares;
333	static int preparemax, preparecnt;
334
335	static struct ev_check **checks;
336	static int checkmax, checkcnt;
337
338	/*****************************************************************************/
339
340	static struct ev_child *childs [PID_HASHSIZE];
341	static struct ev_signal childev;
342
343	#ifndef WCONTINUED
344	# define WCONTINUED 0
345	#endif
346
347	static void
348	childcb (struct ev_signal *sw, int revents)
349	{
350	struct ev_child *w;
351	int pid, status;
352
353	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)
354	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
355	if (w->pid == pid || w->pid == -1)
356	{
357	w->status = status;
358	event ((W)w, EV_CHILD);
359	}
360	}
361
362	/*****************************************************************************/
363
364	#if HAVE_EPOLL
365	# include "ev_epoll.c"
366	#endif
367	#if HAVE_SELECT
368	# include "ev_select.c"
369	#endif
370
371	int ev_init (int flags)
372	{
373	#if HAVE_MONOTONIC
374	{
375	struct timespec ts;
376	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
377	have_monotonic = 1;
378	}
379	#endif
380
381	ev_now = ev_time ();
382	now = get_clock ();
383	diff = ev_now - now;
384
385	if (pipe (sigpipe))
386	return 0;
387
388	ev_method = EVMETHOD_NONE;
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
391	#endif
392	#if HAVE_SELECT
393	if (ev_method == EVMETHOD_NONE) select_init (flags);
394	#endif
395
396	if (ev_method)
397	{
398	evw_init (&sigev, sigcb);
399	siginit ();
400
401	evsignal_init (&childev, childcb, SIGCHLD);
402	evsignal_start (&childev);
403	}
404
405	return ev_method;
406	}
407
408	/*****************************************************************************/
409
410	void ev_prefork (void)
411	{
412	/* nop */
413	}
414
415	void ev_postfork_parent (void)
416	{
417	/* nop */
418	}
419
420	void ev_postfork_child (void)
421	{
422	#if HAVE_EPOLL
423	if (ev_method == EVMETHOD_EPOLL)
424	epoll_postfork_child ();
425	#endif
426
427	evio_stop (&sigev);
428	close (sigpipe [0]);
429	close (sigpipe [1]);
430	pipe (sigpipe);
431	siginit ();
432	}
433
434	/*****************************************************************************/
435
436	static void
437	fd_reify (void)
438	{	434	{
439	int i;	435	int i;
440		436
441	for (i = 0; i < fdchangecnt; ++i)	437	for (i = 0; i < fdchangecnt; ++i)
442	{	438	{
443	int fd = fdchanges [i];	439	int fd = fdchanges [i];
444	ANFD *anfd = anfds + fd;	440	ANFD *anfd = anfds + fd;
445	struct ev_io *w;	441	struct ev_io *w;
446		442
447	int wev = 0;	443	int events = 0;
448		444
449	for (w = anfd->head; w; w = w->next)	445	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
450	wev |= w->events;	446	events |= w->events;
451		447
452	if (anfd->wev != wev)	448	#if EV_SELECT_IS_WINSOCKET
		449	if (events)
453	{	450	{
454	method_modify (fd, anfd->wev, wev);	451	unsigned long argp;
455	anfd->wev = wev;	452	anfd->handle = _get_osfhandle (fd);
		453	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
456	}	454	}
		455	#endif
		456
		457	anfd->reify = 0;
		458
		459	method_modify (EV_A_ fd, anfd->events, events);
		460	anfd->events = events;
457	}	461	}
458		462
459	fdchangecnt = 0;	463	fdchangecnt = 0;
460	}	464	}
461		465
462	static void	466	static void
463	call_pending ()	467	fd_change (EV_P_ int fd)
464	{	468	{
465	while (pendingcnt)	469	if (expect_false (anfds [fd].reify))
		470	return;
		471
		472	anfds [fd].reify = 1;
		473
		474	++fdchangecnt;
		475	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		476	fdchanges [fdchangecnt - 1] = fd;
		477	}
		478
		479	static void
		480	fd_kill (EV_P_ int fd)
		481	{
		482	struct ev_io *w;
		483
		484	while ((w = (struct ev_io *)anfds [fd].head))
		485	{
		486	ev_io_stop (EV_A_ w);
		487	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		488	}
		489	}
		490
		491	inline int
		492	fd_valid (int fd)
		493	{
		494	#ifdef _WIN32
		495	return _get_osfhandle (fd) != -1;
		496	#else
		497	return fcntl (fd, F_GETFD) != -1;
		498	#endif
		499	}
		500
		501	/* called on EBADF to verify fds */
		502	static void
		503	fd_ebadf (EV_P)
		504	{
		505	int fd;
		506
		507	for (fd = 0; fd < anfdmax; ++fd)
		508	if (anfds [fd].events)
		509	if (!fd_valid (fd) == -1 && errno == EBADF)
		510	fd_kill (EV_A_ fd);
		511	}
		512
		513	/* called on ENOMEM in select/poll to kill some fds and retry */
		514	static void
		515	fd_enomem (EV_P)
		516	{
		517	int fd;
		518
		519	for (fd = anfdmax; fd--; )
		520	if (anfds [fd].events)
466	{	521	{
467	ANPENDING *p = pendings + --pendingcnt;	522	fd_kill (EV_A_ fd);
		523	return;
		524	}
		525	}
468		526
469	if (p->w)	527	/* usually called after fork if method needs to re-arm all fds from scratch */
		528	static void
		529	fd_rearm_all (EV_P)
		530	{
		531	int fd;
		532
		533	/* this should be highly optimised to not do anything but set a flag */
		534	for (fd = 0; fd < anfdmax; ++fd)
		535	if (anfds [fd].events)
		536	{
		537	anfds [fd].events = 0;
		538	fd_change (EV_A_ fd);
		539	}
		540	}
		541
		542	/*****************************************************************************/
		543
		544	static void
		545	upheap (WT *heap, int k)
		546	{
		547	WT w = heap [k];
		548
		549	while (k && heap [k >> 1]->at > w->at)
		550	{
		551	heap [k] = heap [k >> 1];
		552	((W)heap [k])->active = k + 1;
		553	k >>= 1;
		554	}
		555
		556	heap [k] = w;
		557	((W)heap [k])->active = k + 1;
		558
		559	}
		560
		561	static void
		562	downheap (WT *heap, int N, int k)
		563	{
		564	WT w = heap [k];
		565
		566	while (k < (N >> 1))
		567	{
		568	int j = k << 1;
		569
		570	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		571	++j;
		572
		573	if (w->at <= heap [j]->at)
		574	break;
		575
		576	heap [k] = heap [j];
		577	((W)heap [k])->active = k + 1;
		578	k = j;
		579	}
		580
		581	heap [k] = w;
		582	((W)heap [k])->active = k + 1;
		583	}
		584
		585	inline void
		586	adjustheap (WT *heap, int N, int k)
		587	{
		588	upheap (heap, k);
		589	downheap (heap, N, k);
		590	}
		591
		592	/*****************************************************************************/
		593
		594	typedef struct
		595	{
		596	WL head;
		597	sig_atomic_t volatile gotsig;
		598	} ANSIG;
		599
		600	static ANSIG *signals;
		601	static int signalmax;
		602
		603	static int sigpipe [2];
		604	static sig_atomic_t volatile gotsig;
		605	static struct ev_io sigev;
		606
		607	static void
		608	signals_init (ANSIG *base, int count)
		609	{
		610	while (count--)
		611	{
		612	base->head = 0;
		613	base->gotsig = 0;
		614
		615	++base;
		616	}
		617	}
		618
		619	static void
		620	sighandler (int signum)
		621	{
		622	#if _WIN32
		623	signal (signum, sighandler);
		624	#endif
		625
		626	signals [signum - 1].gotsig = 1;
		627
		628	if (!gotsig)
		629	{
		630	int old_errno = errno;
		631	gotsig = 1;
		632	write (sigpipe [1], &signum, 1);
		633	errno = old_errno;
		634	}
		635	}
		636
		637	void
		638	ev_feed_signal_event (EV_P_ int signum)
		639	{
		640	WL w;
		641
		642	#if EV_MULTIPLICITY
		643	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		644	#endif
		645
		646	--signum;
		647
		648	if (signum < 0 || signum >= signalmax)
		649	return;
		650
		651	signals [signum].gotsig = 0;
		652
		653	for (w = signals [signum].head; w; w = w->next)
		654	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		655	}
		656
		657	static void
		658	sigcb (EV_P_ struct ev_io *iow, int revents)
		659	{
		660	int signum;
		661
		662	read (sigpipe [0], &revents, 1);
		663	gotsig = 0;
		664
		665	for (signum = signalmax; signum--; )
		666	if (signals [signum].gotsig)
		667	ev_feed_signal_event (EV_A_ signum + 1);
		668	}
		669
		670	static void
		671	fd_intern (int fd)
		672	{
		673	#ifdef _WIN32
		674	int arg = 1;
		675	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		676	#else
		677	fcntl (fd, F_SETFD, FD_CLOEXEC);
		678	fcntl (fd, F_SETFL, O_NONBLOCK);
		679	#endif
		680	}
		681
		682	static void
		683	siginit (EV_P)
		684	{
		685	fd_intern (sigpipe [0]);
		686	fd_intern (sigpipe [1]);
		687
		688	ev_io_set (&sigev, sigpipe [0], EV_READ);
		689	ev_io_start (EV_A_ &sigev);
		690	ev_unref (EV_A); /* child watcher should not keep loop alive */
		691	}
		692
		693	/*****************************************************************************/
		694
		695	static struct ev_child *childs [PID_HASHSIZE];
		696
		697	#ifndef _WIN32
		698
		699	static struct ev_signal childev;
		700
		701	#ifndef WCONTINUED
		702	# define WCONTINUED 0
		703	#endif
		704
		705	static void
		706	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		707	{
		708	struct ev_child *w;
		709
		710	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		711	if (w->pid == pid || !w->pid)
		712	{
		713	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		714	w->rpid = pid;
		715	w->rstatus = status;
		716	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		717	}
		718	}
		719
		720	static void
		721	childcb (EV_P_ struct ev_signal *sw, int revents)
		722	{
		723	int pid, status;
		724
		725	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		726	{
		727	/* make sure we are called again until all childs have been reaped */
		728	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		729
		730	child_reap (EV_A_ sw, pid, pid, status);
		731	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		732	}
		733	}
		734
		735	#endif
		736
		737	/*****************************************************************************/
		738
		739	#if EV_USE_PORT
		740	# include "ev_port.c"
		741	#endif
		742	#if EV_USE_KQUEUE
		743	# include "ev_kqueue.c"
		744	#endif
		745	#if EV_USE_EPOLL
		746	# include "ev_epoll.c"
		747	#endif
		748	#if EV_USE_POLL
		749	# include "ev_poll.c"
		750	#endif
		751	#if EV_USE_SELECT
		752	# include "ev_select.c"
		753	#endif
		754
		755	int
		756	ev_version_major (void)
		757	{
		758	return EV_VERSION_MAJOR;
		759	}
		760
		761	int
		762	ev_version_minor (void)
		763	{
		764	return EV_VERSION_MINOR;
		765	}
		766
		767	/* return true if we are running with elevated privileges and should ignore env variables */
		768	static int
		769	enable_secure (void)
		770	{
		771	#ifdef _WIN32
		772	return 0;
		773	#else
		774	return getuid () != geteuid ()
		775	|| getgid () != getegid ();
		776	#endif
		777	}
		778
		779	unsigned int
		780	ev_method (EV_P)
		781	{
		782	return method;
		783	}
		784
		785	static void
		786	loop_init (EV_P_ unsigned int flags)
		787	{
		788	if (!method)
		789	{
		790	#if EV_USE_MONOTONIC
		791	{
		792	struct timespec ts;
		793	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		794	have_monotonic = 1;
		795	}
		796	#endif
		797
		798	ev_rt_now = ev_time ();
		799	mn_now = get_clock ();
		800	now_floor = mn_now;
		801	rtmn_diff = ev_rt_now - mn_now;
		802
		803	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
		804	flags = atoi (getenv ("LIBEV_FLAGS"));
		805
		806	if (!(flags & 0x0000ffff))
		807	flags |= 0x0000ffff;
		808
		809	method = 0;
		810	#if EV_USE_PORT
		811	if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);
		812	#endif
		813	#if EV_USE_KQUEUE
		814	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		815	#endif
		816	#if EV_USE_EPOLL
		817	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
		818	#endif
		819	#if EV_USE_POLL
		820	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
		821	#endif
		822	#if EV_USE_SELECT
		823	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
		824	#endif
		825
		826	ev_init (&sigev, sigcb);
		827	ev_set_priority (&sigev, EV_MAXPRI);
		828	}
		829	}
		830
		831	static void
		832	loop_destroy (EV_P)
		833	{
		834	int i;
		835
		836	#if EV_USE_PORT
		837	if (method == EVMETHOD_PORT ) port_destroy (EV_A);
		838	#endif
		839	#if EV_USE_KQUEUE
		840	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		841	#endif
		842	#if EV_USE_EPOLL
		843	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		844	#endif
		845	#if EV_USE_POLL
		846	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		847	#endif
		848	#if EV_USE_SELECT
		849	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		850	#endif
		851
		852	for (i = NUMPRI; i--; )
		853	array_free (pending, [i]);
		854
		855	/* have to use the microsoft-never-gets-it-right macro */
		856	array_free (fdchange, EMPTY0);
		857	array_free (timer, EMPTY0);
		858	#if EV_PERIODICS
		859	array_free (periodic, EMPTY0);
		860	#endif
		861	array_free (idle, EMPTY0);
		862	array_free (prepare, EMPTY0);
		863	array_free (check, EMPTY0);
		864
		865	method = 0;
		866	}
		867
		868	static void
		869	loop_fork (EV_P)
		870	{
		871	#if EV_USE_PORT
		872	if (method == EVMETHOD_PORT ) port_fork (EV_A);
		873	#endif
		874	#if EV_USE_KQUEUE
		875	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		876	#endif
		877	#if EV_USE_EPOLL
		878	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		879	#endif
		880
		881	if (ev_is_active (&sigev))
		882	{
		883	/* default loop */
		884
		885	ev_ref (EV_A);
		886	ev_io_stop (EV_A_ &sigev);
		887	close (sigpipe [0]);
		888	close (sigpipe [1]);
		889
		890	while (pipe (sigpipe))
		891	syserr ("(libev) error creating pipe");
		892
		893	siginit (EV_A);
		894	}
		895
		896	postfork = 0;
		897	}
		898
		899	#if EV_MULTIPLICITY
		900	struct ev_loop *
		901	ev_loop_new (unsigned int flags)
		902	{
		903	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		904
		905	memset (loop, 0, sizeof (struct ev_loop));
		906
		907	loop_init (EV_A_ flags);
		908
		909	if (ev_method (EV_A))
		910	return loop;
		911
		912	return 0;
		913	}
		914
		915	void
		916	ev_loop_destroy (EV_P)
		917	{
		918	loop_destroy (EV_A);
		919	ev_free (loop);
		920	}
		921
		922	void
		923	ev_loop_fork (EV_P)
		924	{
		925	postfork = 1;
		926	}
		927
		928	#endif
		929
		930	#if EV_MULTIPLICITY
		931	struct ev_loop *
		932	ev_default_loop_init (unsigned int flags)
		933	#else
		934	int
		935	ev_default_loop (unsigned int flags)
		936	#endif
		937	{
		938	if (sigpipe [0] == sigpipe [1])
		939	if (pipe (sigpipe))
		940	return 0;
		941
		942	if (!ev_default_loop_ptr)
		943	{
		944	#if EV_MULTIPLICITY
		945	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		946	#else
		947	ev_default_loop_ptr = 1;
		948	#endif
		949
		950	loop_init (EV_A_ flags);
		951
		952	if (ev_method (EV_A))
470	{	953	{
471	p->w->pending = 0;	954	siginit (EV_A);
472	p->w->cb (p->w, p->events);	955
		956	#ifndef _WIN32
		957	ev_signal_init (&childev, childcb, SIGCHLD);
		958	ev_set_priority (&childev, EV_MAXPRI);
		959	ev_signal_start (EV_A_ &childev);
		960	ev_unref (EV_A); /* child watcher should not keep loop alive */
		961	#endif
473	}	962	}
		963	else
		964	ev_default_loop_ptr = 0;
		965	}
		966
		967	return ev_default_loop_ptr;
		968	}
		969
		970	void
		971	ev_default_destroy (void)
		972	{
		973	#if EV_MULTIPLICITY
		974	struct ev_loop *loop = ev_default_loop_ptr;
		975	#endif
		976
		977	#ifndef _WIN32
		978	ev_ref (EV_A); /* child watcher */
		979	ev_signal_stop (EV_A_ &childev);
		980	#endif
		981
		982	ev_ref (EV_A); /* signal watcher */
		983	ev_io_stop (EV_A_ &sigev);
		984
		985	close (sigpipe [0]); sigpipe [0] = 0;
		986	close (sigpipe [1]); sigpipe [1] = 0;
		987
		988	loop_destroy (EV_A);
		989	}
		990
		991	void
		992	ev_default_fork (void)
		993	{
		994	#if EV_MULTIPLICITY
		995	struct ev_loop *loop = ev_default_loop_ptr;
		996	#endif
		997
		998	if (method)
		999	postfork = 1;
		1000	}
		1001
		1002	/*****************************************************************************/
		1003
		1004	static int
		1005	any_pending (EV_P)
		1006	{
		1007	int pri;
		1008
		1009	for (pri = NUMPRI; pri--; )
		1010	if (pendingcnt [pri])
		1011	return 1;
		1012
		1013	return 0;
		1014	}
		1015
		1016	inline void
		1017	call_pending (EV_P)
		1018	{
		1019	int pri;
		1020
		1021	for (pri = NUMPRI; pri--; )
		1022	while (pendingcnt [pri])
		1023	{
		1024	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1025
		1026	if (expect_true (p->w))
		1027	{
		1028	p->w->pending = 0;
		1029	EV_CB_INVOKE (p->w, p->events);
		1030	}
474	}	1031	}
475	}	1032	}
476		1033
477	static void	1034	inline void
478	timers_reify ()	1035	timers_reify (EV_P)
479	{	1036	{
480	while (timercnt && timers [0]->at <= now)	1037	while (timercnt && ((WT)timers [0])->at <= mn_now)
481	{	1038	{
482	struct ev_timer *w = timers [0];	1039	struct ev_timer *w = timers [0];
483		1040
484	event ((W)w, EV_TIMEOUT);	1041	assert (("inactive timer on timer heap detected", ev_is_active (w)));
485		1042
486	/* first reschedule or stop timer */	1043	/* first reschedule or stop timer */
487	if (w->repeat)	1044	if (w->repeat)
488	{	1045	{
		1046	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1047
489	w->at = now + w->repeat;	1048	((WT)w)->at += w->repeat;
490	assert (("timer timeout in the past, negative repeat?", w->at > now));	1049	if (((WT)w)->at < mn_now)
		1050	((WT)w)->at = mn_now;
		1051
491	downheap ((WT *)timers, timercnt, 0);	1052	downheap ((WT *)timers, timercnt, 0);
492	}	1053	}
493	else	1054	else
494	evtimer_stop (w); /* nonrepeating: stop timer */	1055	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
495	}
496	}
497		1056
498	static void	1057	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1058	}
		1059	}
		1060
		1061	#if EV_PERIODICS
		1062	inline void
499	periodics_reify ()	1063	periodics_reify (EV_P)
500	{	1064	{
501	while (periodiccnt && periodics [0]->at <= ev_now)	1065	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
502	{	1066	{
503	struct ev_periodic *w = periodics [0];	1067	struct ev_periodic *w = periodics [0];
504		1068
		1069	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1070
505	/* first reschedule or stop timer */	1071	/* first reschedule or stop timer */
506	if (w->interval)	1072	if (w->reschedule_cb)
507	{	1073	{
		1074	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1075	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1076	downheap ((WT *)periodics, periodiccnt, 0);
		1077	}
		1078	else if (w->interval)
		1079	{
508	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1080	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
509	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1081	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
510	downheap ((WT *)periodics, periodiccnt, 0);	1082	downheap ((WT *)periodics, periodiccnt, 0);
511	}	1083	}
512	else	1084	else
513	evperiodic_stop (w); /* nonrepeating: stop timer */	1085	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
514		1086
515	event ((W)w, EV_TIMEOUT);	1087	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
516	}	1088	}
517	}	1089	}
518		1090
519	static void	1091	static void
520	periodics_reschedule (ev_tstamp diff)	1092	periodics_reschedule (EV_P)
521	{	1093	{
522	int i;	1094	int i;
523		1095
524	/* adjust periodics after time jump */	1096	/* adjust periodics after time jump */
525	for (i = 0; i < periodiccnt; ++i)	1097	for (i = 0; i < periodiccnt; ++i)
526	{	1098	{
527	struct ev_periodic *w = periodics [i];	1099	struct ev_periodic *w = periodics [i];
528		1100
		1101	if (w->reschedule_cb)
		1102	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
529	if (w->interval)	1103	else if (w->interval)
		1104	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1105	}
		1106
		1107	/* now rebuild the heap */
		1108	for (i = periodiccnt >> 1; i--; )
		1109	downheap ((WT *)periodics, periodiccnt, i);
		1110	}
		1111	#endif
		1112
		1113	inline int
		1114	time_update_monotonic (EV_P)
		1115	{
		1116	mn_now = get_clock ();
		1117
		1118	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1119	{
		1120	ev_rt_now = rtmn_diff + mn_now;
		1121	return 0;
		1122	}
		1123	else
		1124	{
		1125	now_floor = mn_now;
		1126	ev_rt_now = ev_time ();
		1127	return 1;
		1128	}
		1129	}
		1130
		1131	inline void
		1132	time_update (EV_P)
		1133	{
		1134	int i;
		1135
		1136	#if EV_USE_MONOTONIC
		1137	if (expect_true (have_monotonic))
		1138	{
		1139	if (time_update_monotonic (EV_A))
530	{	1140	{
531	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1141	ev_tstamp odiff = rtmn_diff;
532		1142
533	if (fabs (diff) >= 1e-4)	1143	for (i = 4; --i; ) /* loop a few times, before making important decisions */
534	{	1144	{
535	evperiodic_stop (w);	1145	rtmn_diff = ev_rt_now - mn_now;
536	evperiodic_start (w);
537		1146
538	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1147	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1148	return; /* all is well */
		1149
		1150	ev_rt_now = ev_time ();
		1151	mn_now = get_clock ();
		1152	now_floor = mn_now;
539	}	1153	}
		1154
		1155	# if EV_PERIODICS
		1156	periodics_reschedule (EV_A);
		1157	# endif
		1158	/* no timer adjustment, as the monotonic clock doesn't jump */
		1159	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
540	}	1160	}
541	}	1161	}
542	}	1162	else
543		1163	#endif
544	static void	1164	{
545	time_update ()
546	{
547	int i;
548
549	ev_now = ev_time ();	1165	ev_rt_now = ev_time ();
550		1166
551	if (have_monotonic)	1167	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
552	{
553	ev_tstamp odiff = diff;
554
555	for (i = 4; --i; ) /* loop a few times, before making important decisions */
556	{	1168	{
557	now = get_clock ();	1169	#if EV_PERIODICS
558	diff = ev_now - now;
559
560	if (fabs (odiff - diff) < MIN_TIMEJUMP)
561	return; /* all is well */
562
563	ev_now = ev_time ();
564	}
565
566	periodics_reschedule (diff - odiff);
567	/* no timer adjustment, as the monotonic clock doesn't jump */
568	}
569	else
570	{
571	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
572	{
573	periodics_reschedule (ev_now - now);	1170	periodics_reschedule (EV_A);
		1171	#endif
574		1172
575	/* adjust timers. this is easy, as the offset is the same for all */	1173	/* adjust timers. this is easy, as the offset is the same for all */
576	for (i = 0; i < timercnt; ++i)	1174	for (i = 0; i < timercnt; ++i)
577	timers [i]->at += diff;	1175	((WT)timers [i])->at += ev_rt_now - mn_now;
578	}	1176	}
579		1177
580	now = ev_now;	1178	mn_now = ev_rt_now;
581	}	1179	}
582	}	1180	}
583		1181
584	int ev_loop_done;	1182	void
		1183	ev_ref (EV_P)
		1184	{
		1185	++activecnt;
		1186	}
585		1187
		1188	void
		1189	ev_unref (EV_P)
		1190	{
		1191	--activecnt;
		1192	}
		1193
		1194	static int loop_done;
		1195
		1196	void
586	void ev_loop (int flags)	1197	ev_loop (EV_P_ int flags)
587	{	1198	{
588	double block;	1199	double block;
589	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1200	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
590		1201
591	do	1202	while (activecnt)
592	{	1203	{
593	/* queue check watchers (and execute them) */	1204	/* queue check watchers (and execute them) */
594	if (preparecnt)	1205	if (expect_false (preparecnt))
595	{	1206	{
596	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1207	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
597	call_pending ();	1208	call_pending (EV_A);
598	}	1209	}
599		1210
		1211	/* we might have forked, so reify kernel state if necessary */
		1212	if (expect_false (postfork))
		1213	loop_fork (EV_A);
		1214
600	/* update fd-related kernel structures */	1215	/* update fd-related kernel structures */
601	fd_reify ();	1216	fd_reify (EV_A);
602		1217
603	/* calculate blocking time */	1218	/* calculate blocking time */
604		1219
605	/* we only need this for !monotonic clockor timers, but as we basically	1220	/* we only need this for !monotonic clock or timers, but as we basically
606	always have timers, we just calculate it always */	1221	always have timers, we just calculate it always */
		1222	#if EV_USE_MONOTONIC
		1223	if (expect_true (have_monotonic))
		1224	time_update_monotonic (EV_A);
		1225	else
		1226	#endif
		1227	{
607	ev_now = ev_time ();	1228	ev_rt_now = ev_time ();
		1229	mn_now = ev_rt_now;
		1230	}
608		1231
609	if (flags & EVLOOP_NONBLOCK || idlecnt)	1232	if (flags & EVLOOP_NONBLOCK || idlecnt)
610	block = 0.;	1233	block = 0.;
611	else	1234	else
612	{	1235	{
613	block = MAX_BLOCKTIME;	1236	block = MAX_BLOCKTIME;
614		1237
615	if (timercnt)	1238	if (timercnt)
616	{	1239	{
617	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1240	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
618	if (block > to) block = to;	1241	if (block > to) block = to;
619	}	1242	}
620		1243
		1244	#if EV_PERIODICS
621	if (periodiccnt)	1245	if (periodiccnt)
622	{	1246	{
623	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1247	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
624	if (block > to) block = to;	1248	if (block > to) block = to;
625	}	1249	}
		1250	#endif
626		1251
627	if (block < 0.) block = 0.;	1252	if (expect_false (block < 0.)) block = 0.;
628	}	1253	}
629		1254
630	method_poll (block);	1255	method_poll (EV_A_ block);
631		1256
632	/* update ev_now, do magic */	1257	/* update ev_rt_now, do magic */
633	time_update ();	1258	time_update (EV_A);
634		1259
635	/* queue pending timers and reschedule them */	1260	/* queue pending timers and reschedule them */
636	timers_reify (); /* relative timers called last */	1261	timers_reify (EV_A); /* relative timers called last */
		1262	#if EV_PERIODICS
637	periodics_reify (); /* absolute timers called first */	1263	periodics_reify (EV_A); /* absolute timers called first */
		1264	#endif
638		1265
639	/* queue idle watchers unless io or timers are pending */	1266	/* queue idle watchers unless io or timers are pending */
640	if (!pendingcnt)	1267	if (idlecnt && !any_pending (EV_A))
641	queue_events ((W *)idles, idlecnt, EV_IDLE);	1268	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
642		1269
643	/* queue check watchers, to be executed first */	1270	/* queue check watchers, to be executed first */
644	if (checkcnt)	1271	if (expect_false (checkcnt))
645	queue_events ((W *)checks, checkcnt, EV_CHECK);	1272	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
646		1273
647	call_pending ();	1274	call_pending (EV_A);
648	}
649	while (!ev_loop_done);
650		1275
		1276	if (expect_false (loop_done))
		1277	break;
		1278	}
		1279
651	if (ev_loop_done != 2)	1280	if (loop_done != 2)
652	ev_loop_done = 0;	1281	loop_done = 0;
		1282	}
		1283
		1284	void
		1285	ev_unloop (EV_P_ int how)
		1286	{
		1287	loop_done = how;
653	}	1288	}
654		1289
655	/*****************************************************************************/	1290	/*****************************************************************************/
656		1291
657	static void	1292	inline void
658	wlist_add (WL *head, WL elem)	1293	wlist_add (WL *head, WL elem)
659	{	1294	{
660	elem->next = *head;	1295	elem->next = *head;
661	*head = elem;	1296	*head = elem;
662	}	1297	}
663		1298
664	static void	1299	inline void
665	wlist_del (WL *head, WL elem)	1300	wlist_del (WL *head, WL elem)
666	{	1301	{
667	while (*head)	1302	while (*head)
668	{	1303	{
669	if (*head == elem)	1304	if (*head == elem)
…		…
674		1309
675	head = &(*head)->next;	1310	head = &(*head)->next;
676	}	1311	}
677	}	1312	}
678		1313
679	static void	1314	inline void
680	ev_clear (W w)	1315	ev_clear_pending (EV_P_ W w)
681	{	1316	{
682	if (w->pending)	1317	if (w->pending)
683	{	1318	{
684	pendings [w->pending - 1].w = 0;	1319	pendings [ABSPRI (w)][w->pending - 1].w = 0;
685	w->pending = 0;	1320	w->pending = 0;
686	}	1321	}
687	}	1322	}
688		1323
689	static void	1324	inline void
690	ev_start (W w, int active)	1325	ev_start (EV_P_ W w, int active)
691	{	1326	{
		1327	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1328	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1329
692	w->active = active;	1330	w->active = active;
		1331	ev_ref (EV_A);
693	}	1332	}
694		1333
695	static void	1334	inline void
696	ev_stop (W w)	1335	ev_stop (EV_P_ W w)
697	{	1336	{
		1337	ev_unref (EV_A);
698	w->active = 0;	1338	w->active = 0;
699	}	1339	}
700		1340
701	/*****************************************************************************/	1341	/*****************************************************************************/
702		1342
703	void	1343	void
704	evio_start (struct ev_io *w)	1344	ev_io_start (EV_P_ struct ev_io *w)
705	{	1345	{
706	if (ev_is_active (w))
707	return;
708
709	int fd = w->fd;	1346	int fd = w->fd;
710		1347
		1348	if (expect_false (ev_is_active (w)))
		1349	return;
		1350
		1351	assert (("ev_io_start called with negative fd", fd >= 0));
		1352
711	ev_start ((W)w, 1);	1353	ev_start (EV_A_ (W)w, 1);
712	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1354	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
713	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1355	wlist_add ((WL *)&anfds[fd].head, (WL)w);
714		1356
715	++fdchangecnt;	1357	fd_change (EV_A_ fd);
716	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
717	fdchanges [fdchangecnt - 1] = fd;
718	}	1358	}
719		1359
720	void	1360	void
721	evio_stop (struct ev_io *w)	1361	ev_io_stop (EV_P_ struct ev_io *w)
722	{	1362	{
723	ev_clear ((W)w);	1363	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1364	if (expect_false (!ev_is_active (w)))
725	return;	1365	return;
		1366
		1367	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
726		1368
727	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1369	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
728	ev_stop ((W)w);	1370	ev_stop (EV_A_ (W)w);
729		1371
730	++fdchangecnt;	1372	fd_change (EV_A_ w->fd);
731	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
732	fdchanges [fdchangecnt - 1] = w->fd;
733	}	1373	}
734		1374
735	void	1375	void
736	evtimer_start (struct ev_timer *w)	1376	ev_timer_start (EV_P_ struct ev_timer *w)
737	{	1377	{
738	if (ev_is_active (w))	1378	if (expect_false (ev_is_active (w)))
739	return;	1379	return;
740		1380
741	w->at += now;	1381	((WT)w)->at += mn_now;
742		1382
743	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1383	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
744		1384
745	ev_start ((W)w, ++timercnt);	1385	ev_start (EV_A_ (W)w, ++timercnt);
746	array_needsize (timers, timermax, timercnt, );	1386	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
747	timers [timercnt - 1] = w;	1387	timers [timercnt - 1] = w;
748	upheap ((WT *)timers, timercnt - 1);	1388	upheap ((WT *)timers, timercnt - 1);
749	}
750		1389
		1390	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1391	}
		1392
751	void	1393	void
752	evtimer_stop (struct ev_timer *w)	1394	ev_timer_stop (EV_P_ struct ev_timer *w)
753	{	1395	{
754	ev_clear ((W)w);	1396	ev_clear_pending (EV_A_ (W)w);
755	if (!ev_is_active (w))	1397	if (expect_false (!ev_is_active (w)))
756	return;	1398	return;
757		1399
		1400	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1401
758	if (w->active < timercnt--)	1402	if (expect_true (((W)w)->active < timercnt--))
759	{	1403	{
760	timers [w->active - 1] = timers [timercnt];	1404	timers [((W)w)->active - 1] = timers [timercnt];
761	downheap ((WT *)timers, timercnt, w->active - 1);	1405	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
762	}	1406	}
763		1407
764	w->at = w->repeat;	1408	((WT)w)->at -= mn_now;
765		1409
766	ev_stop ((W)w);	1410	ev_stop (EV_A_ (W)w);
767	}	1411	}
768		1412
769	void	1413	void
770	evtimer_again (struct ev_timer *w)	1414	ev_timer_again (EV_P_ struct ev_timer *w)
771	{	1415	{
772	if (ev_is_active (w))	1416	if (ev_is_active (w))
773	{	1417	{
774	if (w->repeat)	1418	if (w->repeat)
775	{	1419	{
776	w->at = now + w->repeat;	1420	((WT)w)->at = mn_now + w->repeat;
777	downheap ((WT *)timers, timercnt, w->active - 1);	1421	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
778	}	1422	}
779	else	1423	else
780	evtimer_stop (w);	1424	ev_timer_stop (EV_A_ w);
781	}	1425	}
782	else if (w->repeat)	1426	else if (w->repeat)
		1427	{
		1428	w->at = w->repeat;
783	evtimer_start (w);	1429	ev_timer_start (EV_A_ w);
		1430	}
784	}	1431	}
785		1432
		1433	#if EV_PERIODICS
786	void	1434	void
787	evperiodic_start (struct ev_periodic *w)	1435	ev_periodic_start (EV_P_ struct ev_periodic *w)
788	{	1436	{
789	if (ev_is_active (w))	1437	if (expect_false (ev_is_active (w)))
790	return;	1438	return;
791		1439
792	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1440	if (w->reschedule_cb)
793		1441	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1442	else if (w->interval)
		1443	{
		1444	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
794	/* this formula differs from the one in periodic_reify because we do not always round up */	1445	/* this formula differs from the one in periodic_reify because we do not always round up */
795	if (w->interval)
796	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1446	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1447	}
797		1448
798	ev_start ((W)w, ++periodiccnt);	1449	ev_start (EV_A_ (W)w, ++periodiccnt);
799	array_needsize (periodics, periodicmax, periodiccnt, );	1450	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
800	periodics [periodiccnt - 1] = w;	1451	periodics [periodiccnt - 1] = w;
801	upheap ((WT *)periodics, periodiccnt - 1);	1452	upheap ((WT *)periodics, periodiccnt - 1);
802	}
803		1453
		1454	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1455	}
		1456
804	void	1457	void
805	evperiodic_stop (struct ev_periodic *w)	1458	ev_periodic_stop (EV_P_ struct ev_periodic *w)
806	{	1459	{
807	ev_clear ((W)w);	1460	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1461	if (expect_false (!ev_is_active (w)))
809	return;	1462	return;
810		1463
		1464	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1465
811	if (w->active < periodiccnt--)	1466	if (expect_true (((W)w)->active < periodiccnt--))
812	{	1467	{
813	periodics [w->active - 1] = periodics [periodiccnt];	1468	periodics [((W)w)->active - 1] = periodics [periodiccnt];
814	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1469	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
815	}	1470	}
816		1471
817	ev_stop ((W)w);	1472	ev_stop (EV_A_ (W)w);
818	}	1473	}
819		1474
820	void	1475	void
		1476	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1477	{
		1478	/* TODO: use adjustheap and recalculation */
		1479	ev_periodic_stop (EV_A_ w);
		1480	ev_periodic_start (EV_A_ w);
		1481	}
		1482	#endif
		1483
		1484	void
		1485	ev_idle_start (EV_P_ struct ev_idle *w)
		1486	{
		1487	if (expect_false (ev_is_active (w)))
		1488	return;
		1489
		1490	ev_start (EV_A_ (W)w, ++idlecnt);
		1491	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1492	idles [idlecnt - 1] = w;
		1493	}
		1494
		1495	void
		1496	ev_idle_stop (EV_P_ struct ev_idle *w)
		1497	{
		1498	ev_clear_pending (EV_A_ (W)w);
		1499	if (expect_false (!ev_is_active (w)))
		1500	return;
		1501
		1502	idles [((W)w)->active - 1] = idles [--idlecnt];
		1503	ev_stop (EV_A_ (W)w);
		1504	}
		1505
		1506	void
		1507	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1508	{
		1509	if (expect_false (ev_is_active (w)))
		1510	return;
		1511
		1512	ev_start (EV_A_ (W)w, ++preparecnt);
		1513	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1514	prepares [preparecnt - 1] = w;
		1515	}
		1516
		1517	void
		1518	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1519	{
		1520	ev_clear_pending (EV_A_ (W)w);
		1521	if (expect_false (!ev_is_active (w)))
		1522	return;
		1523
		1524	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1525	ev_stop (EV_A_ (W)w);
		1526	}
		1527
		1528	void
		1529	ev_check_start (EV_P_ struct ev_check *w)
		1530	{
		1531	if (expect_false (ev_is_active (w)))
		1532	return;
		1533
		1534	ev_start (EV_A_ (W)w, ++checkcnt);
		1535	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1536	checks [checkcnt - 1] = w;
		1537	}
		1538
		1539	void
		1540	ev_check_stop (EV_P_ struct ev_check *w)
		1541	{
		1542	ev_clear_pending (EV_A_ (W)w);
		1543	if (expect_false (!ev_is_active (w)))
		1544	return;
		1545
		1546	checks [((W)w)->active - 1] = checks [--checkcnt];
		1547	ev_stop (EV_A_ (W)w);
		1548	}
		1549
		1550	#ifndef SA_RESTART
		1551	# define SA_RESTART 0
		1552	#endif
		1553
		1554	void
821	evsignal_start (struct ev_signal *w)	1555	ev_signal_start (EV_P_ struct ev_signal *w)
822	{	1556	{
		1557	#if EV_MULTIPLICITY
		1558	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1559	#endif
823	if (ev_is_active (w))	1560	if (expect_false (ev_is_active (w)))
824	return;	1561	return;
825		1562
		1563	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1564
826	ev_start ((W)w, 1);	1565	ev_start (EV_A_ (W)w, 1);
827	array_needsize (signals, signalmax, w->signum, signals_init);	1566	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
828	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1567	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
829		1568
830	if (!w->next)	1569	if (!((WL)w)->next)
831	{	1570	{
		1571	#if _WIN32
		1572	signal (w->signum, sighandler);
		1573	#else
832	struct sigaction sa;	1574	struct sigaction sa;
833	sa.sa_handler = sighandler;	1575	sa.sa_handler = sighandler;
834	sigfillset (&sa.sa_mask);	1576	sigfillset (&sa.sa_mask);
835	sa.sa_flags = 0;	1577	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
836	sigaction (w->signum, &sa, 0);	1578	sigaction (w->signum, &sa, 0);
		1579	#endif
837	}	1580	}
838	}	1581	}
839		1582
840	void	1583	void
841	evsignal_stop (struct ev_signal *w)	1584	ev_signal_stop (EV_P_ struct ev_signal *w)
842	{	1585	{
843	ev_clear ((W)w);	1586	ev_clear_pending (EV_A_ (W)w);
844	if (!ev_is_active (w))	1587	if (expect_false (!ev_is_active (w)))
845	return;	1588	return;
846		1589
847	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1590	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
848	ev_stop ((W)w);	1591	ev_stop (EV_A_ (W)w);
849		1592
850	if (!signals [w->signum - 1].head)	1593	if (!signals [w->signum - 1].head)
851	signal (w->signum, SIG_DFL);	1594	signal (w->signum, SIG_DFL);
852	}	1595	}
853		1596
854	void evidle_start (struct ev_idle *w)	1597	void
855	{
856	if (ev_is_active (w))
857	return;
858
859	ev_start ((W)w, ++idlecnt);
860	array_needsize (idles, idlemax, idlecnt, );
861	idles [idlecnt - 1] = w;
862	}
863
864	void evidle_stop (struct ev_idle *w)
865	{
866	ev_clear ((W)w);
867	if (ev_is_active (w))
868	return;
869
870	idles [w->active - 1] = idles [--idlecnt];
871	ev_stop ((W)w);
872	}
873
874	void evprepare_start (struct ev_prepare *w)
875	{
876	if (ev_is_active (w))
877	return;
878
879	ev_start ((W)w, ++preparecnt);
880	array_needsize (prepares, preparemax, preparecnt, );
881	prepares [preparecnt - 1] = w;
882	}
883
884	void evprepare_stop (struct ev_prepare *w)
885	{
886	ev_clear ((W)w);
887	if (ev_is_active (w))
888	return;
889
890	prepares [w->active - 1] = prepares [--preparecnt];
891	ev_stop ((W)w);
892	}
893
894	void evcheck_start (struct ev_check *w)
895	{
896	if (ev_is_active (w))
897	return;
898
899	ev_start ((W)w, ++checkcnt);
900	array_needsize (checks, checkmax, checkcnt, );
901	checks [checkcnt - 1] = w;
902	}
903
904	void evcheck_stop (struct ev_check *w)
905	{
906	ev_clear ((W)w);
907	if (ev_is_active (w))
908	return;
909
910	checks [w->active - 1] = checks [--checkcnt];
911	ev_stop ((W)w);
912	}
913
914	void evchild_start (struct ev_child *w)	1598	ev_child_start (EV_P_ struct ev_child *w)
915	{	1599	{
		1600	#if EV_MULTIPLICITY
		1601	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1602	#endif
916	if (ev_is_active (w))	1603	if (expect_false (ev_is_active (w)))
917	return;	1604	return;
918		1605
919	ev_start ((W)w, 1);	1606	ev_start (EV_A_ (W)w, 1);
920	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1607	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
921	}	1608	}
922		1609
		1610	void
923	void evchild_stop (struct ev_child *w)	1611	ev_child_stop (EV_P_ struct ev_child *w)
924	{	1612	{
925	ev_clear ((W)w);	1613	ev_clear_pending (EV_A_ (W)w);
926	if (ev_is_active (w))	1614	if (expect_false (!ev_is_active (w)))
927	return;	1615	return;
928		1616
929	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1617	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	ev_stop ((W)w);	1618	ev_stop (EV_A_ (W)w);
931	}	1619	}
932		1620
933	/*****************************************************************************/	1621	/*****************************************************************************/
934		1622
935	struct ev_once	1623	struct ev_once
…		…
939	void (*cb)(int revents, void *arg);	1627	void (*cb)(int revents, void *arg);
940	void *arg;	1628	void *arg;
941	};	1629	};
942		1630
943	static void	1631	static void
944	once_cb (struct ev_once *once, int revents)	1632	once_cb (EV_P_ struct ev_once *once, int revents)
945	{	1633	{
946	void (*cb)(int revents, void *arg) = once->cb;	1634	void (*cb)(int revents, void *arg) = once->cb;
947	void *arg = once->arg;	1635	void *arg = once->arg;
948		1636
949	evio_stop (&once->io);	1637	ev_io_stop (EV_A_ &once->io);
950	evtimer_stop (&once->to);	1638	ev_timer_stop (EV_A_ &once->to);
951	free (once);	1639	ev_free (once);
952		1640
953	cb (revents, arg);	1641	cb (revents, arg);
954	}	1642	}
955		1643
956	static void	1644	static void
957	once_cb_io (struct ev_io *w, int revents)	1645	once_cb_io (EV_P_ struct ev_io *w, int revents)
958	{	1646	{
959	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1647	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
960	}	1648	}
961		1649
962	static void	1650	static void
963	once_cb_to (struct ev_timer *w, int revents)	1651	once_cb_to (EV_P_ struct ev_timer *w, int revents)
964	{	1652	{
965	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1653	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
966	}	1654	}
967		1655
968	void	1656	void
969	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1657	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
970	{	1658	{
971	struct ev_once *once = malloc (sizeof (struct ev_once));	1659	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
972		1660
973	if (!once)	1661	if (expect_false (!once))
974	cb (EV_ERROR, arg);	1662	{
975	else	1663	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1664	return;
976	{	1665	}
		1666
977	once->cb = cb;	1667	once->cb = cb;
978	once->arg = arg;	1668	once->arg = arg;
979		1669
980	evw_init (&once->io, once_cb_io);	1670	ev_init (&once->io, once_cb_io);
981
982	if (fd >= 0)	1671	if (fd >= 0)
983	{	1672	{
984	evio_set (&once->io, fd, events);	1673	ev_io_set (&once->io, fd, events);
985	evio_start (&once->io);	1674	ev_io_start (EV_A_ &once->io);
986	}	1675	}
987		1676
988	evw_init (&once->to, once_cb_to);	1677	ev_init (&once->to, once_cb_to);
989
990	if (timeout >= 0.)	1678	if (timeout >= 0.)
991	{	1679	{
992	evtimer_set (&once->to, timeout, 0.);	1680	ev_timer_set (&once->to, timeout, 0.);
993	evtimer_start (&once->to);	1681	ev_timer_start (EV_A_ &once->to);
994	}
995	}
996	}
997
998	/*****************************************************************************/
999
1000	#if 0
1001
1002	struct ev_io wio;
1003
1004	static void
1005	sin_cb (struct ev_io *w, int revents)
1006	{
1007	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1008	}
1009
1010	static void
1011	ocb (struct ev_timer *w, int revents)
1012	{
1013	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1014	evtimer_stop (w);
1015	evtimer_start (w);
1016	}
1017
1018	static void
1019	scb (struct ev_signal *w, int revents)
1020	{
1021	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1022	evio_stop (&wio);
1023	evio_start (&wio);
1024	}
1025
1026	static void
1027	gcb (struct ev_signal *w, int revents)
1028	{
1029	fprintf (stderr, "generic %x\n", revents);
1030
1031	}
1032
1033	int main (void)
1034	{
1035	ev_init (0);
1036
1037	evio_init (&wio, sin_cb, 0, EV_READ);
1038	evio_start (&wio);
1039
1040	struct ev_timer t[10000];
1041
1042	#if 0
1043	int i;
1044	for (i = 0; i < 10000; ++i)
1045	{	1682	}
1046	struct ev_timer *w = t + i;
1047	evw_init (w, ocb, i);
1048	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1049	evtimer_start (w);
1050	if (drand48 () < 0.5)
1051	evtimer_stop (w);
1052	}
1053	#endif
1054
1055	struct ev_timer t1;
1056	evtimer_init (&t1, ocb, 5, 10);
1057	evtimer_start (&t1);
1058
1059	struct ev_signal sig;
1060	evsignal_init (&sig, scb, SIGQUIT);
1061	evsignal_start (&sig);
1062
1063	struct ev_check cw;
1064	evcheck_init (&cw, gcb);
1065	evcheck_start (&cw);
1066
1067	struct ev_idle iw;
1068	evidle_init (&iw, gcb);
1069	evidle_start (&iw);
1070
1071	ev_loop (0);
1072
1073	return 0;
1074	}	1683	}
1075		1684
		1685	#ifdef __cplusplus
		1686	}
1076	#endif	1687	#endif
1077		1688
1078
1079
1080

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