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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 1.127 by root, Sun Nov 18 02:17:57 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	# ifndef EV_USE_SELECT
		56	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		57	# define EV_USE_SELECT 1
		58	# else
		59	# define EV_USE_SELECT 0
		60	# endif
		61	# endif
		62
		63	# ifndef EV_USE_POLL
		64	# if HAVE_POLL && HAVE_POLL_H
		65	# define EV_USE_POLL 1
		66	# else
		67	# define EV_USE_POLL 0
		68	# endif
		69	# endif
		70
		71	# ifndef EV_USE_EPOLL
		72	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		73	# define EV_USE_EPOLL 1
		74	# else
		75	# define EV_USE_EPOLL 0
		76	# endif
		77	# endif
		78
		79	# ifndef EV_USE_KQUEUE
		80	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		81	# define EV_USE_KQUEUE 1
		82	# else
		83	# define EV_USE_KQUEUE 0
		84	# endif
		85	# endif
		86
		87	# ifndef EV_USE_PORT
		88	# if HAVE_PORT_H && HAVE_PORT_CREATE
		89	# define EV_USE_PORT 1
		90	# else
		91	# define EV_USE_PORT 0
		92	# endif
		93	# endif
		94
		95	#endif
		96
30	#include <math.h>	97	#include <math.h>
31	#include <stdlib.h>	98	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	99	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	100	#include <stddef.h>
36		101
37	#include <stdio.h>	102	#include <stdio.h>
38		103
39	#include <assert.h>	104	#include <assert.h>
40	#include <errno.h>	105	#include <errno.h>
41	#include <sys/types.h>	106	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	107	#include <time.h>
45		108
46	#ifndef HAVE_MONOTONIC	109	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	110
48	# define HAVE_MONOTONIC 1	111	#ifndef _WIN32
		112	# include <unistd.h>
		113	# include <sys/time.h>
		114	# include <sys/wait.h>
		115	#else
		116	# define WIN32_LEAN_AND_MEAN
		117	# include <windows.h>
		118	# ifndef EV_SELECT_IS_WINSOCKET
		119	# define EV_SELECT_IS_WINSOCKET 1
49	# endif	120	# endif
50	#endif	121	#endif
51		122
		123	/**/
		124
		125	#ifndef EV_USE_MONOTONIC
		126	# define EV_USE_MONOTONIC 0
		127	#endif
		128
		129	#ifndef EV_USE_REALTIME
		130	# define EV_USE_REALTIME 0
		131	#endif
		132
52	#ifndef HAVE_SELECT	133	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	134	# define EV_USE_SELECT 1
		135	#endif
		136
		137	#ifndef EV_USE_POLL
		138	# ifdef _WIN32
		139	# define EV_USE_POLL 0
		140	# else
		141	# define EV_USE_POLL 1
54	#endif	142	# endif
		143	#endif
55		144
56	#ifndef HAVE_EPOLL	145	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	146	# define EV_USE_EPOLL 0
58	#endif	147	#endif
59		148
		149	#ifndef EV_USE_KQUEUE
		150	# define EV_USE_KQUEUE 0
		151	#endif
		152
		153	#ifndef EV_USE_PORT
		154	# define EV_USE_PORT 0
		155	#endif
		156
		157	/**/
		158
		159	/* darwin simply cannot be helped */
		160	#ifdef __APPLE__
		161	# undef EV_USE_POLL
		162	# undef EV_USE_KQUEUE
		163	#endif
		164
		165	#ifndef CLOCK_MONOTONIC
		166	# undef EV_USE_MONOTONIC
		167	# define EV_USE_MONOTONIC 0
		168	#endif
		169
60	#ifndef HAVE_REALTIME	170	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	171	# undef EV_USE_REALTIME
		172	# define EV_USE_REALTIME 0
62	#endif	173	#endif
		174
		175	#if EV_SELECT_IS_WINSOCKET
		176	# include <winsock.h>
		177	#endif
		178
		179	/**/
63		180
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	181	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	182	#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 */	183	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		184	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
67		185
		186	#ifdef EV_H
		187	# include EV_H
		188	#else
68	#include "ev.h"	189	# include "ev.h"
		190	#endif
		191
		192	#if __GNUC__ >= 3
		193	# define expect(expr,value) __builtin_expect ((expr),(value))
		194	# define inline static inline
		195	#else
		196	# define expect(expr,value) (expr)
		197	# define inline static
		198	#endif
		199
		200	#define expect_false(expr) expect ((expr) != 0, 0)
		201	#define expect_true(expr) expect ((expr) != 0, 1)
		202
		203	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		204	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		205
		206	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		207	#define EMPTY2(a,b) /* used to suppress some warnings */
69		208
70	typedef struct ev_watcher *W;	209	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	210	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	211	typedef struct ev_watcher_time *WT;
73		212
74	static ev_tstamp now, diff; /* monotonic clock */	213	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		214
		215	#ifdef _WIN32
		216	# include "ev_win32.c"
		217	#endif
		218
		219	/*****************************************************************************/
		220
		221	static void (*syserr_cb)(const char *msg);
		222
		223	void ev_set_syserr_cb (void (*cb)(const char *msg))
		224	{
		225	syserr_cb = cb;
		226	}
		227
		228	static void
		229	syserr (const char *msg)
		230	{
		231	if (!msg)
		232	msg = "(libev) system error";
		233
		234	if (syserr_cb)
		235	syserr_cb (msg);
		236	else
		237	{
		238	perror (msg);
		239	abort ();
		240	}
		241	}
		242
		243	static void *(*alloc)(void *ptr, long size);
		244
		245	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		246	{
		247	alloc = cb;
		248	}
		249
		250	static void *
		251	ev_realloc (void *ptr, long size)
		252	{
		253	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		254
		255	if (!ptr && size)
		256	{
		257	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		258	abort ();
		259	}
		260
		261	return ptr;
		262	}
		263
		264	#define ev_malloc(size) ev_realloc (0, (size))
		265	#define ev_free(ptr) ev_realloc ((ptr), 0)
		266
		267	/*****************************************************************************/
		268
		269	typedef struct
		270	{
		271	WL head;
		272	unsigned char events;
		273	unsigned char reify;
		274	#if EV_SELECT_IS_WINSOCKET
		275	SOCKET handle;
		276	#endif
		277	} ANFD;
		278
		279	typedef struct
		280	{
		281	W w;
		282	int events;
		283	} ANPENDING;
		284
		285	#if EV_MULTIPLICITY
		286
		287	struct ev_loop
		288	{
		289	ev_tstamp ev_rt_now;
		290	#define ev_rt_now ((loop)->ev_rt_now)
		291	#define VAR(name,decl) decl;
		292	#include "ev_vars.h"
		293	#undef VAR
		294	};
		295	#include "ev_wrap.h"
		296
		297	static struct ev_loop default_loop_struct;
		298	struct ev_loop *ev_default_loop_ptr;
		299
		300	#else
		301
75	ev_tstamp ev_now;	302	ev_tstamp ev_rt_now;
76	int ev_method;	303	#define VAR(name,decl) static decl;
		304	#include "ev_vars.h"
		305	#undef VAR
77		306
78	static int have_monotonic; /* runtime */	307	static int ev_default_loop_ptr;
79		308
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	309	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		310
84	/*****************************************************************************/	311	/*****************************************************************************/
85		312
86	ev_tstamp	313	ev_tstamp
87	ev_time (void)	314	ev_time (void)
88	{	315	{
89	#if HAVE_REALTIME	316	#if EV_USE_REALTIME
90	struct timespec ts;	317	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	318	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	319	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	320	#else
94	struct timeval tv;	321	struct timeval tv;
95	gettimeofday (&tv, 0);	322	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	323	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	324	#endif
98	}	325	}
99		326
100	static ev_tstamp	327	inline ev_tstamp
101	get_clock (void)	328	get_clock (void)
102	{	329	{
103	#if HAVE_MONOTONIC	330	#if EV_USE_MONOTONIC
104	if (have_monotonic)	331	if (expect_true (have_monotonic))
105	{	332	{
106	struct timespec ts;	333	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	334	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	335	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	336	}
110	#endif	337	#endif
111		338
112	return ev_time ();	339	return ev_time ();
113	}	340	}
114		341
		342	#if EV_MULTIPLICITY
		343	ev_tstamp
		344	ev_now (EV_P)
		345	{
		346	return ev_rt_now;
		347	}
		348	#endif
		349
		350	#define array_roundsize(type,n) (((n) | 4) & ~3)
		351
115	#define array_needsize(base,cur,cnt,init) \	352	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	353	if (expect_false ((cnt) > cur)) \
117	{ \	354	{ \
118	int newcnt = cur ? cur << 1 : 16; \	355	int newcnt = cur; \
		356	do \
		357	{ \
		358	newcnt = array_roundsize (type, newcnt << 1); \
		359	} \
		360	while ((cnt) > newcnt); \
		361	\
119	base = realloc (base, sizeof (*base) * (newcnt)); \	362	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
120	init (base + cur, newcnt - cur); \	363	init (base + cur, newcnt - cur); \
121	cur = newcnt; \	364	cur = newcnt; \
122	}	365	}
		366
		367	#define array_slim(type,stem) \
		368	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		369	{ \
		370	stem ## max = array_roundsize (stem ## cnt >> 1); \
		371	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		372	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		373	}
		374
		375	#define array_free(stem, idx) \
		376	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
123		377
124	/*****************************************************************************/	378	/*****************************************************************************/
125		379
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	380	static void
139	anfds_init (ANFD *base, int count)	381	anfds_init (ANFD *base, int count)
140	{	382	{
141	while (count--)	383	while (count--)
142	{	384	{
143	base->head = 0;	385	base->head = 0;
144	base->wev = base->rev = EV_NONE;	386	base->events = EV_NONE;
		387	base->reify = 0;
		388
145	++base;	389	++base;
146	}	390	}
147	}	391	}
148		392
149	typedef struct	393	void
		394	ev_feed_event (EV_P_ void *w, int revents)
150	{	395	{
151	W w;	396	W w_ = (W)w;
152	int events;
153	} ANPENDING;
154		397
155	static ANPENDING *pendings;	398	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	{	399	{
163	w->pending = ++pendingcnt;
164	array_needsize (pendings, pendingmax, pendingcnt, );
165	pendings [pendingcnt - 1].w = w;
166	pendings [pendingcnt - 1].events = events;	400	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		401	return;
167	}	402	}
168	}
169		403
		404	w_->pending = ++pendingcnt [ABSPRI (w_)];
		405	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		406	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		407	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		408	}
		409
170	static void	410	static void
		411	queue_events (EV_P_ W *events, int eventcnt, int type)
		412	{
		413	int i;
		414
		415	for (i = 0; i < eventcnt; ++i)
		416	ev_feed_event (EV_A_ events [i], type);
		417	}
		418
		419	inline void
171	fd_event (int fd, int events)	420	fd_event (EV_P_ int fd, int revents)
172	{	421	{
173	ANFD *anfd = anfds + fd;	422	ANFD *anfd = anfds + fd;
174	struct ev_io *w;	423	struct ev_io *w;
175		424
176	for (w = anfd->head; w; w = w->next)	425	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
177	{	426	{
178	int ev = w->events & events;	427	int ev = w->events & revents;
179		428
180	if (ev)	429	if (ev)
181	event ((W)w, ev);	430	ev_feed_event (EV_A_ (W)w, ev);
182	}	431	}
183	}	432	}
184		433
185	static void	434	void
186	queue_events (W *events, int eventcnt, int type)	435	ev_feed_fd_event (EV_P_ int fd, int revents)
187	{	436	{
188	int i;	437	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	}	438	}
206		439
207	/*****************************************************************************/	440	/*****************************************************************************/
208		441
209	static struct ev_timer **timers;	442	inline void
210	static int timermax, timercnt;	443	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	{	444	{
439	int i;	445	int i;
440		446
441	for (i = 0; i < fdchangecnt; ++i)	447	for (i = 0; i < fdchangecnt; ++i)
442	{	448	{
443	int fd = fdchanges [i];	449	int fd = fdchanges [i];
444	ANFD *anfd = anfds + fd;	450	ANFD *anfd = anfds + fd;
445	struct ev_io *w;	451	struct ev_io *w;
446		452
447	int wev = 0;	453	int events = 0;
448		454
449	for (w = anfd->head; w; w = w->next)	455	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
450	wev |= w->events;	456	events |= w->events;
451		457
452	if (anfd->wev != wev)	458	#if EV_SELECT_IS_WINSOCKET
		459	if (events)
453	{	460	{
454	method_modify (fd, anfd->wev, wev);	461	unsigned long argp;
455	anfd->wev = wev;	462	anfd->handle = _get_osfhandle (fd);
		463	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
456	}	464	}
		465	#endif
		466
		467	anfd->reify = 0;
		468
		469	method_modify (EV_A_ fd, anfd->events, events);
		470	anfd->events = events;
457	}	471	}
458		472
459	fdchangecnt = 0;	473	fdchangecnt = 0;
460	}	474	}
461		475
462	static void	476	static void
463	call_pending ()	477	fd_change (EV_P_ int fd)
464	{	478	{
465	while (pendingcnt)	479	if (expect_false (anfds [fd].reify))
		480	return;
		481
		482	anfds [fd].reify = 1;
		483
		484	++fdchangecnt;
		485	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		486	fdchanges [fdchangecnt - 1] = fd;
		487	}
		488
		489	static void
		490	fd_kill (EV_P_ int fd)
		491	{
		492	struct ev_io *w;
		493
		494	while ((w = (struct ev_io *)anfds [fd].head))
		495	{
		496	ev_io_stop (EV_A_ w);
		497	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		498	}
		499	}
		500
		501	inline int
		502	fd_valid (int fd)
		503	{
		504	#ifdef _WIN32
		505	return _get_osfhandle (fd) != -1;
		506	#else
		507	return fcntl (fd, F_GETFD) != -1;
		508	#endif
		509	}
		510
		511	/* called on EBADF to verify fds */
		512	static void
		513	fd_ebadf (EV_P)
		514	{
		515	int fd;
		516
		517	for (fd = 0; fd < anfdmax; ++fd)
		518	if (anfds [fd].events)
		519	if (!fd_valid (fd) == -1 && errno == EBADF)
		520	fd_kill (EV_A_ fd);
		521	}
		522
		523	/* called on ENOMEM in select/poll to kill some fds and retry */
		524	static void
		525	fd_enomem (EV_P)
		526	{
		527	int fd;
		528
		529	for (fd = anfdmax; fd--; )
		530	if (anfds [fd].events)
466	{	531	{
467	ANPENDING *p = pendings + --pendingcnt;	532	fd_kill (EV_A_ fd);
		533	return;
		534	}
		535	}
468		536
469	if (p->w)	537	/* usually called after fork if method needs to re-arm all fds from scratch */
		538	static void
		539	fd_rearm_all (EV_P)
		540	{
		541	int fd;
		542
		543	/* this should be highly optimised to not do anything but set a flag */
		544	for (fd = 0; fd < anfdmax; ++fd)
		545	if (anfds [fd].events)
		546	{
		547	anfds [fd].events = 0;
		548	fd_change (EV_A_ fd);
		549	}
		550	}
		551
		552	/*****************************************************************************/
		553
		554	static void
		555	upheap (WT *heap, int k)
		556	{
		557	WT w = heap [k];
		558
		559	while (k && heap [k >> 1]->at > w->at)
		560	{
		561	heap [k] = heap [k >> 1];
		562	((W)heap [k])->active = k + 1;
		563	k >>= 1;
		564	}
		565
		566	heap [k] = w;
		567	((W)heap [k])->active = k + 1;
		568
		569	}
		570
		571	static void
		572	downheap (WT *heap, int N, int k)
		573	{
		574	WT w = heap [k];
		575
		576	while (k < (N >> 1))
		577	{
		578	int j = k << 1;
		579
		580	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		581	++j;
		582
		583	if (w->at <= heap [j]->at)
		584	break;
		585
		586	heap [k] = heap [j];
		587	((W)heap [k])->active = k + 1;
		588	k = j;
		589	}
		590
		591	heap [k] = w;
		592	((W)heap [k])->active = k + 1;
		593	}
		594
		595	inline void
		596	adjustheap (WT *heap, int N, int k)
		597	{
		598	upheap (heap, k);
		599	downheap (heap, N, k);
		600	}
		601
		602	/*****************************************************************************/
		603
		604	typedef struct
		605	{
		606	WL head;
		607	sig_atomic_t volatile gotsig;
		608	} ANSIG;
		609
		610	static ANSIG *signals;
		611	static int signalmax;
		612
		613	static int sigpipe [2];
		614	static sig_atomic_t volatile gotsig;
		615	static struct ev_io sigev;
		616
		617	static void
		618	signals_init (ANSIG *base, int count)
		619	{
		620	while (count--)
		621	{
		622	base->head = 0;
		623	base->gotsig = 0;
		624
		625	++base;
		626	}
		627	}
		628
		629	static void
		630	sighandler (int signum)
		631	{
		632	#if _WIN32
		633	signal (signum, sighandler);
		634	#endif
		635
		636	signals [signum - 1].gotsig = 1;
		637
		638	if (!gotsig)
		639	{
		640	int old_errno = errno;
		641	gotsig = 1;
		642	write (sigpipe [1], &signum, 1);
		643	errno = old_errno;
		644	}
		645	}
		646
		647	void
		648	ev_feed_signal_event (EV_P_ int signum)
		649	{
		650	WL w;
		651
		652	#if EV_MULTIPLICITY
		653	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		654	#endif
		655
		656	--signum;
		657
		658	if (signum < 0 || signum >= signalmax)
		659	return;
		660
		661	signals [signum].gotsig = 0;
		662
		663	for (w = signals [signum].head; w; w = w->next)
		664	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		665	}
		666
		667	static void
		668	sigcb (EV_P_ struct ev_io *iow, int revents)
		669	{
		670	int signum;
		671
		672	read (sigpipe [0], &revents, 1);
		673	gotsig = 0;
		674
		675	for (signum = signalmax; signum--; )
		676	if (signals [signum].gotsig)
		677	ev_feed_signal_event (EV_A_ signum + 1);
		678	}
		679
		680	static void
		681	fd_intern (int fd)
		682	{
		683	#ifdef _WIN32
		684	int arg = 1;
		685	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		686	#else
		687	fcntl (fd, F_SETFD, FD_CLOEXEC);
		688	fcntl (fd, F_SETFL, O_NONBLOCK);
		689	#endif
		690	}
		691
		692	static void
		693	siginit (EV_P)
		694	{
		695	fd_intern (sigpipe [0]);
		696	fd_intern (sigpipe [1]);
		697
		698	ev_io_set (&sigev, sigpipe [0], EV_READ);
		699	ev_io_start (EV_A_ &sigev);
		700	ev_unref (EV_A); /* child watcher should not keep loop alive */
		701	}
		702
		703	/*****************************************************************************/
		704
		705	static struct ev_child *childs [PID_HASHSIZE];
		706
		707	#ifndef _WIN32
		708
		709	static struct ev_signal childev;
		710
		711	#ifndef WCONTINUED
		712	# define WCONTINUED 0
		713	#endif
		714
		715	static void
		716	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		717	{
		718	struct ev_child *w;
		719
		720	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		721	if (w->pid == pid || !w->pid)
		722	{
		723	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		724	w->rpid = pid;
		725	w->rstatus = status;
		726	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		727	}
		728	}
		729
		730	static void
		731	childcb (EV_P_ struct ev_signal *sw, int revents)
		732	{
		733	int pid, status;
		734
		735	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		736	{
		737	/* make sure we are called again until all childs have been reaped */
		738	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		739
		740	child_reap (EV_A_ sw, pid, pid, status);
		741	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		742	}
		743	}
		744
		745	#endif
		746
		747	/*****************************************************************************/
		748
		749	#if EV_USE_PORT
		750	# include "ev_port.c"
		751	#endif
		752	#if EV_USE_KQUEUE
		753	# include "ev_kqueue.c"
		754	#endif
		755	#if EV_USE_EPOLL
		756	# include "ev_epoll.c"
		757	#endif
		758	#if EV_USE_POLL
		759	# include "ev_poll.c"
		760	#endif
		761	#if EV_USE_SELECT
		762	# include "ev_select.c"
		763	#endif
		764
		765	int
		766	ev_version_major (void)
		767	{
		768	return EV_VERSION_MAJOR;
		769	}
		770
		771	int
		772	ev_version_minor (void)
		773	{
		774	return EV_VERSION_MINOR;
		775	}
		776
		777	/* return true if we are running with elevated privileges and should ignore env variables */
		778	static int
		779	enable_secure (void)
		780	{
		781	#ifdef _WIN32
		782	return 0;
		783	#else
		784	return getuid () != geteuid ()
		785	|| getgid () != getegid ();
		786	#endif
		787	}
		788
		789	unsigned int
		790	ev_method (EV_P)
		791	{
		792	return method;
		793	}
		794
		795	static void
		796	loop_init (EV_P_ unsigned int flags)
		797	{
		798	if (!method)
		799	{
		800	#if EV_USE_MONOTONIC
		801	{
		802	struct timespec ts;
		803	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		804	have_monotonic = 1;
		805	}
		806	#endif
		807
		808	ev_rt_now = ev_time ();
		809	mn_now = get_clock ();
		810	now_floor = mn_now;
		811	rtmn_diff = ev_rt_now - mn_now;
		812
		813	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
		814	flags = atoi (getenv ("LIBEV_FLAGS"));
		815
		816	if (!(flags & 0x0000ffff))
		817	flags |= 0x0000ffff;
		818
		819	method = 0;
		820	#if EV_USE_PORT
		821	if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);
		822	#endif
		823	#if EV_USE_KQUEUE
		824	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		825	#endif
		826	#if EV_USE_EPOLL
		827	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
		828	#endif
		829	#if EV_USE_POLL
		830	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
		831	#endif
		832	#if EV_USE_SELECT
		833	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
		834	#endif
		835
		836	ev_init (&sigev, sigcb);
		837	ev_set_priority (&sigev, EV_MAXPRI);
		838	}
		839	}
		840
		841	static void
		842	loop_destroy (EV_P)
		843	{
		844	int i;
		845
		846	#if EV_USE_PORT
		847	if (method == EVMETHOD_PORT ) port_destroy (EV_A);
		848	#endif
		849	#if EV_USE_KQUEUE
		850	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		851	#endif
		852	#if EV_USE_EPOLL
		853	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		854	#endif
		855	#if EV_USE_POLL
		856	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		857	#endif
		858	#if EV_USE_SELECT
		859	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		860	#endif
		861
		862	for (i = NUMPRI; i--; )
		863	array_free (pending, [i]);
		864
		865	/* have to use the microsoft-never-gets-it-right macro */
		866	array_free (fdchange, EMPTY0);
		867	array_free (timer, EMPTY0);
		868	#if EV_PERIODICS
		869	array_free (periodic, EMPTY0);
		870	#endif
		871	array_free (idle, EMPTY0);
		872	array_free (prepare, EMPTY0);
		873	array_free (check, EMPTY0);
		874
		875	method = 0;
		876	}
		877
		878	static void
		879	loop_fork (EV_P)
		880	{
		881	#if EV_USE_PORT
		882	if (method == EVMETHOD_PORT ) port_fork (EV_A);
		883	#endif
		884	#if EV_USE_KQUEUE
		885	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		886	#endif
		887	#if EV_USE_EPOLL
		888	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		889	#endif
		890
		891	if (ev_is_active (&sigev))
		892	{
		893	/* default loop */
		894
		895	ev_ref (EV_A);
		896	ev_io_stop (EV_A_ &sigev);
		897	close (sigpipe [0]);
		898	close (sigpipe [1]);
		899
		900	while (pipe (sigpipe))
		901	syserr ("(libev) error creating pipe");
		902
		903	siginit (EV_A);
		904	}
		905
		906	postfork = 0;
		907	}
		908
		909	#if EV_MULTIPLICITY
		910	struct ev_loop *
		911	ev_loop_new (unsigned int flags)
		912	{
		913	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		914
		915	memset (loop, 0, sizeof (struct ev_loop));
		916
		917	loop_init (EV_A_ flags);
		918
		919	if (ev_method (EV_A))
		920	return loop;
		921
		922	return 0;
		923	}
		924
		925	void
		926	ev_loop_destroy (EV_P)
		927	{
		928	loop_destroy (EV_A);
		929	ev_free (loop);
		930	}
		931
		932	void
		933	ev_loop_fork (EV_P)
		934	{
		935	postfork = 1;
		936	}
		937
		938	#endif
		939
		940	#if EV_MULTIPLICITY
		941	struct ev_loop *
		942	ev_default_loop_init (unsigned int flags)
		943	#else
		944	int
		945	ev_default_loop (unsigned int flags)
		946	#endif
		947	{
		948	if (sigpipe [0] == sigpipe [1])
		949	if (pipe (sigpipe))
		950	return 0;
		951
		952	if (!ev_default_loop_ptr)
		953	{
		954	#if EV_MULTIPLICITY
		955	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		956	#else
		957	ev_default_loop_ptr = 1;
		958	#endif
		959
		960	loop_init (EV_A_ flags);
		961
		962	if (ev_method (EV_A))
470	{	963	{
471	p->w->pending = 0;	964	siginit (EV_A);
472	p->w->cb (p->w, p->events);	965
		966	#ifndef _WIN32
		967	ev_signal_init (&childev, childcb, SIGCHLD);
		968	ev_set_priority (&childev, EV_MAXPRI);
		969	ev_signal_start (EV_A_ &childev);
		970	ev_unref (EV_A); /* child watcher should not keep loop alive */
		971	#endif
473	}	972	}
		973	else
		974	ev_default_loop_ptr = 0;
		975	}
		976
		977	return ev_default_loop_ptr;
		978	}
		979
		980	void
		981	ev_default_destroy (void)
		982	{
		983	#if EV_MULTIPLICITY
		984	struct ev_loop *loop = ev_default_loop_ptr;
		985	#endif
		986
		987	#ifndef _WIN32
		988	ev_ref (EV_A); /* child watcher */
		989	ev_signal_stop (EV_A_ &childev);
		990	#endif
		991
		992	ev_ref (EV_A); /* signal watcher */
		993	ev_io_stop (EV_A_ &sigev);
		994
		995	close (sigpipe [0]); sigpipe [0] = 0;
		996	close (sigpipe [1]); sigpipe [1] = 0;
		997
		998	loop_destroy (EV_A);
		999	}
		1000
		1001	void
		1002	ev_default_fork (void)
		1003	{
		1004	#if EV_MULTIPLICITY
		1005	struct ev_loop *loop = ev_default_loop_ptr;
		1006	#endif
		1007
		1008	if (method)
		1009	postfork = 1;
		1010	}
		1011
		1012	/*****************************************************************************/
		1013
		1014	static int
		1015	any_pending (EV_P)
		1016	{
		1017	int pri;
		1018
		1019	for (pri = NUMPRI; pri--; )
		1020	if (pendingcnt [pri])
		1021	return 1;
		1022
		1023	return 0;
		1024	}
		1025
		1026	inline void
		1027	call_pending (EV_P)
		1028	{
		1029	int pri;
		1030
		1031	for (pri = NUMPRI; pri--; )
		1032	while (pendingcnt [pri])
		1033	{
		1034	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1035
		1036	if (expect_true (p->w))
		1037	{
		1038	p->w->pending = 0;
		1039	EV_CB_INVOKE (p->w, p->events);
		1040	}
474	}	1041	}
475	}	1042	}
476		1043
477	static void	1044	inline void
478	timers_reify ()	1045	timers_reify (EV_P)
479	{	1046	{
480	while (timercnt && timers [0]->at <= now)	1047	while (timercnt && ((WT)timers [0])->at <= mn_now)
481	{	1048	{
482	struct ev_timer *w = timers [0];	1049	struct ev_timer *w = timers [0];
483		1050
484	event ((W)w, EV_TIMEOUT);	1051	assert (("inactive timer on timer heap detected", ev_is_active (w)));
485		1052
486	/* first reschedule or stop timer */	1053	/* first reschedule or stop timer */
487	if (w->repeat)	1054	if (w->repeat)
488	{	1055	{
		1056	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1057
489	w->at = now + w->repeat;	1058	((WT)w)->at += w->repeat;
490	assert (("timer timeout in the past, negative repeat?", w->at > now));	1059	if (((WT)w)->at < mn_now)
		1060	((WT)w)->at = mn_now;
		1061
491	downheap ((WT *)timers, timercnt, 0);	1062	downheap ((WT *)timers, timercnt, 0);
492	}	1063	}
493	else	1064	else
494	evtimer_stop (w); /* nonrepeating: stop timer */	1065	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
495	}
496	}
497		1066
498	static void	1067	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1068	}
		1069	}
		1070
		1071	#if EV_PERIODICS
		1072	inline void
499	periodics_reify ()	1073	periodics_reify (EV_P)
500	{	1074	{
501	while (periodiccnt && periodics [0]->at <= ev_now)	1075	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
502	{	1076	{
503	struct ev_periodic *w = periodics [0];	1077	struct ev_periodic *w = periodics [0];
504		1078
		1079	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1080
505	/* first reschedule or stop timer */	1081	/* first reschedule or stop timer */
506	if (w->interval)	1082	if (w->reschedule_cb)
507	{	1083	{
		1084	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1085	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1086	downheap ((WT *)periodics, periodiccnt, 0);
		1087	}
		1088	else if (w->interval)
		1089	{
508	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1090	((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));	1091	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);	1092	downheap ((WT *)periodics, periodiccnt, 0);
511	}	1093	}
512	else	1094	else
513	evperiodic_stop (w); /* nonrepeating: stop timer */	1095	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
514		1096
515	event ((W)w, EV_TIMEOUT);	1097	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
516	}	1098	}
517	}	1099	}
518		1100
519	static void	1101	static void
520	periodics_reschedule (ev_tstamp diff)	1102	periodics_reschedule (EV_P)
521	{	1103	{
522	int i;	1104	int i;
523		1105
524	/* adjust periodics after time jump */	1106	/* adjust periodics after time jump */
525	for (i = 0; i < periodiccnt; ++i)	1107	for (i = 0; i < periodiccnt; ++i)
526	{	1108	{
527	struct ev_periodic *w = periodics [i];	1109	struct ev_periodic *w = periodics [i];
528		1110
		1111	if (w->reschedule_cb)
		1112	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
529	if (w->interval)	1113	else if (w->interval)
		1114	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1115	}
		1116
		1117	/* now rebuild the heap */
		1118	for (i = periodiccnt >> 1; i--; )
		1119	downheap ((WT *)periodics, periodiccnt, i);
		1120	}
		1121	#endif
		1122
		1123	inline int
		1124	time_update_monotonic (EV_P)
		1125	{
		1126	mn_now = get_clock ();
		1127
		1128	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1129	{
		1130	ev_rt_now = rtmn_diff + mn_now;
		1131	return 0;
		1132	}
		1133	else
		1134	{
		1135	now_floor = mn_now;
		1136	ev_rt_now = ev_time ();
		1137	return 1;
		1138	}
		1139	}
		1140
		1141	inline void
		1142	time_update (EV_P)
		1143	{
		1144	int i;
		1145
		1146	#if EV_USE_MONOTONIC
		1147	if (expect_true (have_monotonic))
		1148	{
		1149	if (time_update_monotonic (EV_A))
530	{	1150	{
531	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1151	ev_tstamp odiff = rtmn_diff;
532		1152
533	if (fabs (diff) >= 1e-4)	1153	for (i = 4; --i; ) /* loop a few times, before making important decisions */
534	{	1154	{
535	evperiodic_stop (w);	1155	rtmn_diff = ev_rt_now - mn_now;
536	evperiodic_start (w);
537		1156
538	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1157	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1158	return; /* all is well */
		1159
		1160	ev_rt_now = ev_time ();
		1161	mn_now = get_clock ();
		1162	now_floor = mn_now;
539	}	1163	}
		1164
		1165	# if EV_PERIODICS
		1166	periodics_reschedule (EV_A);
		1167	# endif
		1168	/* no timer adjustment, as the monotonic clock doesn't jump */
		1169	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
540	}	1170	}
541	}	1171	}
542	}	1172	else
543		1173	#endif
544	static void	1174	{
545	time_update ()
546	{
547	int i;
548
549	ev_now = ev_time ();	1175	ev_rt_now = ev_time ();
550		1176
551	if (have_monotonic)	1177	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	{	1178	{
557	now = get_clock ();	1179	#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);	1180	periodics_reschedule (EV_A);
		1181	#endif
574		1182
575	/* adjust timers. this is easy, as the offset is the same for all */	1183	/* adjust timers. this is easy, as the offset is the same for all */
576	for (i = 0; i < timercnt; ++i)	1184	for (i = 0; i < timercnt; ++i)
577	timers [i]->at += diff;	1185	((WT)timers [i])->at += ev_rt_now - mn_now;
578	}	1186	}
579		1187
580	now = ev_now;	1188	mn_now = ev_rt_now;
581	}	1189	}
582	}	1190	}
583		1191
584	int ev_loop_done;	1192	void
		1193	ev_ref (EV_P)
		1194	{
		1195	++activecnt;
		1196	}
585		1197
		1198	void
		1199	ev_unref (EV_P)
		1200	{
		1201	--activecnt;
		1202	}
		1203
		1204	static int loop_done;
		1205
		1206	void
586	void ev_loop (int flags)	1207	ev_loop (EV_P_ int flags)
587	{	1208	{
588	double block;	1209	double block;
589	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1210	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
590		1211
591	do	1212	while (activecnt)
592	{	1213	{
593	/* queue check watchers (and execute them) */	1214	/* queue check watchers (and execute them) */
594	if (preparecnt)	1215	if (expect_false (preparecnt))
595	{	1216	{
596	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1217	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
597	call_pending ();	1218	call_pending (EV_A);
598	}	1219	}
599		1220
		1221	/* we might have forked, so reify kernel state if necessary */
		1222	if (expect_false (postfork))
		1223	loop_fork (EV_A);
		1224
600	/* update fd-related kernel structures */	1225	/* update fd-related kernel structures */
601	fd_reify ();	1226	fd_reify (EV_A);
602		1227
603	/* calculate blocking time */	1228	/* calculate blocking time */
604		1229
605	/* we only need this for !monotonic clockor timers, but as we basically	1230	/* we only need this for !monotonic clock or timers, but as we basically
606	always have timers, we just calculate it always */	1231	always have timers, we just calculate it always */
		1232	#if EV_USE_MONOTONIC
		1233	if (expect_true (have_monotonic))
		1234	time_update_monotonic (EV_A);
		1235	else
		1236	#endif
		1237	{
607	ev_now = ev_time ();	1238	ev_rt_now = ev_time ();
		1239	mn_now = ev_rt_now;
		1240	}
608		1241
609	if (flags & EVLOOP_NONBLOCK || idlecnt)	1242	if (flags & EVLOOP_NONBLOCK || idlecnt)
610	block = 0.;	1243	block = 0.;
611	else	1244	else
612	{	1245	{
613	block = MAX_BLOCKTIME;	1246	block = MAX_BLOCKTIME;
614		1247
615	if (timercnt)	1248	if (timercnt)
616	{	1249	{
617	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1250	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
618	if (block > to) block = to;	1251	if (block > to) block = to;
619	}	1252	}
620		1253
		1254	#if EV_PERIODICS
621	if (periodiccnt)	1255	if (periodiccnt)
622	{	1256	{
623	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1257	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
624	if (block > to) block = to;	1258	if (block > to) block = to;
625	}	1259	}
		1260	#endif
626		1261
627	if (block < 0.) block = 0.;	1262	if (expect_false (block < 0.)) block = 0.;
628	}	1263	}
629		1264
630	method_poll (block);	1265	method_poll (EV_A_ block);
631		1266
632	/* update ev_now, do magic */	1267	/* update ev_rt_now, do magic */
633	time_update ();	1268	time_update (EV_A);
634		1269
635	/* queue pending timers and reschedule them */	1270	/* queue pending timers and reschedule them */
636	timers_reify (); /* relative timers called last */	1271	timers_reify (EV_A); /* relative timers called last */
		1272	#if EV_PERIODICS
637	periodics_reify (); /* absolute timers called first */	1273	periodics_reify (EV_A); /* absolute timers called first */
		1274	#endif
638		1275
639	/* queue idle watchers unless io or timers are pending */	1276	/* queue idle watchers unless io or timers are pending */
640	if (!pendingcnt)	1277	if (idlecnt && !any_pending (EV_A))
641	queue_events ((W *)idles, idlecnt, EV_IDLE);	1278	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
642		1279
643	/* queue check watchers, to be executed first */	1280	/* queue check watchers, to be executed first */
644	if (checkcnt)	1281	if (expect_false (checkcnt))
645	queue_events ((W *)checks, checkcnt, EV_CHECK);	1282	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
646		1283
647	call_pending ();	1284	call_pending (EV_A);
648	}
649	while (!ev_loop_done);
650		1285
		1286	if (expect_false (loop_done))
		1287	break;
		1288	}
		1289
651	if (ev_loop_done != 2)	1290	if (loop_done != 2)
652	ev_loop_done = 0;	1291	loop_done = 0;
		1292	}
		1293
		1294	void
		1295	ev_unloop (EV_P_ int how)
		1296	{
		1297	loop_done = how;
653	}	1298	}
654		1299
655	/*****************************************************************************/	1300	/*****************************************************************************/
656		1301
657	static void	1302	inline void
658	wlist_add (WL *head, WL elem)	1303	wlist_add (WL *head, WL elem)
659	{	1304	{
660	elem->next = *head;	1305	elem->next = *head;
661	*head = elem;	1306	*head = elem;
662	}	1307	}
663		1308
664	static void	1309	inline void
665	wlist_del (WL *head, WL elem)	1310	wlist_del (WL *head, WL elem)
666	{	1311	{
667	while (*head)	1312	while (*head)
668	{	1313	{
669	if (*head == elem)	1314	if (*head == elem)
…		…
674		1319
675	head = &(*head)->next;	1320	head = &(*head)->next;
676	}	1321	}
677	}	1322	}
678		1323
679	static void	1324	inline void
680	ev_clear (W w)	1325	ev_clear_pending (EV_P_ W w)
681	{	1326	{
682	if (w->pending)	1327	if (w->pending)
683	{	1328	{
684	pendings [w->pending - 1].w = 0;	1329	pendings [ABSPRI (w)][w->pending - 1].w = 0;
685	w->pending = 0;	1330	w->pending = 0;
686	}	1331	}
687	}	1332	}
688		1333
689	static void	1334	inline void
690	ev_start (W w, int active)	1335	ev_start (EV_P_ W w, int active)
691	{	1336	{
		1337	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1338	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1339
692	w->active = active;	1340	w->active = active;
		1341	ev_ref (EV_A);
693	}	1342	}
694		1343
695	static void	1344	inline void
696	ev_stop (W w)	1345	ev_stop (EV_P_ W w)
697	{	1346	{
		1347	ev_unref (EV_A);
698	w->active = 0;	1348	w->active = 0;
699	}	1349	}
700		1350
701	/*****************************************************************************/	1351	/*****************************************************************************/
702		1352
703	void	1353	void
704	evio_start (struct ev_io *w)	1354	ev_io_start (EV_P_ struct ev_io *w)
705	{	1355	{
706	if (ev_is_active (w))
707	return;
708
709	int fd = w->fd;	1356	int fd = w->fd;
710		1357
		1358	if (expect_false (ev_is_active (w)))
		1359	return;
		1360
		1361	assert (("ev_io_start called with negative fd", fd >= 0));
		1362
711	ev_start ((W)w, 1);	1363	ev_start (EV_A_ (W)w, 1);
712	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1364	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
713	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1365	wlist_add ((WL *)&anfds[fd].head, (WL)w);
714		1366
715	++fdchangecnt;	1367	fd_change (EV_A_ fd);
716	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
717	fdchanges [fdchangecnt - 1] = fd;
718	}	1368	}
719		1369
720	void	1370	void
721	evio_stop (struct ev_io *w)	1371	ev_io_stop (EV_P_ struct ev_io *w)
722	{	1372	{
723	ev_clear ((W)w);	1373	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1374	if (expect_false (!ev_is_active (w)))
725	return;	1375	return;
		1376
		1377	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
726		1378
727	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1379	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
728	ev_stop ((W)w);	1380	ev_stop (EV_A_ (W)w);
729		1381
730	++fdchangecnt;	1382	fd_change (EV_A_ w->fd);
731	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
732	fdchanges [fdchangecnt - 1] = w->fd;
733	}	1383	}
734		1384
735	void	1385	void
736	evtimer_start (struct ev_timer *w)	1386	ev_timer_start (EV_P_ struct ev_timer *w)
737	{	1387	{
738	if (ev_is_active (w))	1388	if (expect_false (ev_is_active (w)))
739	return;	1389	return;
740		1390
741	w->at += now;	1391	((WT)w)->at += mn_now;
742		1392
743	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1393	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
744		1394
745	ev_start ((W)w, ++timercnt);	1395	ev_start (EV_A_ (W)w, ++timercnt);
746	array_needsize (timers, timermax, timercnt, );	1396	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
747	timers [timercnt - 1] = w;	1397	timers [timercnt - 1] = w;
748	upheap ((WT *)timers, timercnt - 1);	1398	upheap ((WT *)timers, timercnt - 1);
749	}
750		1399
		1400	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1401	}
		1402
751	void	1403	void
752	evtimer_stop (struct ev_timer *w)	1404	ev_timer_stop (EV_P_ struct ev_timer *w)
753	{	1405	{
754	ev_clear ((W)w);	1406	ev_clear_pending (EV_A_ (W)w);
755	if (!ev_is_active (w))	1407	if (expect_false (!ev_is_active (w)))
756	return;	1408	return;
757		1409
		1410	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1411
758	if (w->active < timercnt--)	1412	if (expect_true (((W)w)->active < timercnt--))
759	{	1413	{
760	timers [w->active - 1] = timers [timercnt];	1414	timers [((W)w)->active - 1] = timers [timercnt];
761	downheap ((WT *)timers, timercnt, w->active - 1);	1415	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
762	}	1416	}
763		1417
764	w->at = w->repeat;	1418	((WT)w)->at -= mn_now;
765		1419
766	ev_stop ((W)w);	1420	ev_stop (EV_A_ (W)w);
767	}	1421	}
768		1422
769	void	1423	void
770	evtimer_again (struct ev_timer *w)	1424	ev_timer_again (EV_P_ struct ev_timer *w)
771	{	1425	{
772	if (ev_is_active (w))	1426	if (ev_is_active (w))
773	{	1427	{
774	if (w->repeat)	1428	if (w->repeat)
775	{	1429	{
776	w->at = now + w->repeat;	1430	((WT)w)->at = mn_now + w->repeat;
777	downheap ((WT *)timers, timercnt, w->active - 1);	1431	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
778	}	1432	}
779	else	1433	else
780	evtimer_stop (w);	1434	ev_timer_stop (EV_A_ w);
781	}	1435	}
782	else if (w->repeat)	1436	else if (w->repeat)
		1437	{
		1438	w->at = w->repeat;
783	evtimer_start (w);	1439	ev_timer_start (EV_A_ w);
		1440	}
784	}	1441	}
785		1442
		1443	#if EV_PERIODICS
786	void	1444	void
787	evperiodic_start (struct ev_periodic *w)	1445	ev_periodic_start (EV_P_ struct ev_periodic *w)
788	{	1446	{
789	if (ev_is_active (w))	1447	if (expect_false (ev_is_active (w)))
790	return;	1448	return;
791		1449
792	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1450	if (w->reschedule_cb)
793		1451	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1452	else if (w->interval)
		1453	{
		1454	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 */	1455	/* 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;	1456	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1457	}
797		1458
798	ev_start ((W)w, ++periodiccnt);	1459	ev_start (EV_A_ (W)w, ++periodiccnt);
799	array_needsize (periodics, periodicmax, periodiccnt, );	1460	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
800	periodics [periodiccnt - 1] = w;	1461	periodics [periodiccnt - 1] = w;
801	upheap ((WT *)periodics, periodiccnt - 1);	1462	upheap ((WT *)periodics, periodiccnt - 1);
802	}
803		1463
		1464	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1465	}
		1466
804	void	1467	void
805	evperiodic_stop (struct ev_periodic *w)	1468	ev_periodic_stop (EV_P_ struct ev_periodic *w)
806	{	1469	{
807	ev_clear ((W)w);	1470	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1471	if (expect_false (!ev_is_active (w)))
809	return;	1472	return;
810		1473
		1474	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1475
811	if (w->active < periodiccnt--)	1476	if (expect_true (((W)w)->active < periodiccnt--))
812	{	1477	{
813	periodics [w->active - 1] = periodics [periodiccnt];	1478	periodics [((W)w)->active - 1] = periodics [periodiccnt];
814	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1479	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
815	}	1480	}
816		1481
817	ev_stop ((W)w);	1482	ev_stop (EV_A_ (W)w);
818	}	1483	}
819		1484
820	void	1485	void
		1486	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1487	{
		1488	/* TODO: use adjustheap and recalculation */
		1489	ev_periodic_stop (EV_A_ w);
		1490	ev_periodic_start (EV_A_ w);
		1491	}
		1492	#endif
		1493
		1494	void
		1495	ev_idle_start (EV_P_ struct ev_idle *w)
		1496	{
		1497	if (expect_false (ev_is_active (w)))
		1498	return;
		1499
		1500	ev_start (EV_A_ (W)w, ++idlecnt);
		1501	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1502	idles [idlecnt - 1] = w;
		1503	}
		1504
		1505	void
		1506	ev_idle_stop (EV_P_ struct ev_idle *w)
		1507	{
		1508	ev_clear_pending (EV_A_ (W)w);
		1509	if (expect_false (!ev_is_active (w)))
		1510	return;
		1511
		1512	idles [((W)w)->active - 1] = idles [--idlecnt];
		1513	ev_stop (EV_A_ (W)w);
		1514	}
		1515
		1516	void
		1517	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1518	{
		1519	if (expect_false (ev_is_active (w)))
		1520	return;
		1521
		1522	ev_start (EV_A_ (W)w, ++preparecnt);
		1523	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1524	prepares [preparecnt - 1] = w;
		1525	}
		1526
		1527	void
		1528	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1529	{
		1530	ev_clear_pending (EV_A_ (W)w);
		1531	if (expect_false (!ev_is_active (w)))
		1532	return;
		1533
		1534	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1535	ev_stop (EV_A_ (W)w);
		1536	}
		1537
		1538	void
		1539	ev_check_start (EV_P_ struct ev_check *w)
		1540	{
		1541	if (expect_false (ev_is_active (w)))
		1542	return;
		1543
		1544	ev_start (EV_A_ (W)w, ++checkcnt);
		1545	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1546	checks [checkcnt - 1] = w;
		1547	}
		1548
		1549	void
		1550	ev_check_stop (EV_P_ struct ev_check *w)
		1551	{
		1552	ev_clear_pending (EV_A_ (W)w);
		1553	if (expect_false (!ev_is_active (w)))
		1554	return;
		1555
		1556	checks [((W)w)->active - 1] = checks [--checkcnt];
		1557	ev_stop (EV_A_ (W)w);
		1558	}
		1559
		1560	#ifndef SA_RESTART
		1561	# define SA_RESTART 0
		1562	#endif
		1563
		1564	void
821	evsignal_start (struct ev_signal *w)	1565	ev_signal_start (EV_P_ struct ev_signal *w)
822	{	1566	{
		1567	#if EV_MULTIPLICITY
		1568	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1569	#endif
823	if (ev_is_active (w))	1570	if (expect_false (ev_is_active (w)))
824	return;	1571	return;
825		1572
		1573	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1574
826	ev_start ((W)w, 1);	1575	ev_start (EV_A_ (W)w, 1);
827	array_needsize (signals, signalmax, w->signum, signals_init);	1576	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
828	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1577	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
829		1578
830	if (!w->next)	1579	if (!((WL)w)->next)
831	{	1580	{
		1581	#if _WIN32
		1582	signal (w->signum, sighandler);
		1583	#else
832	struct sigaction sa;	1584	struct sigaction sa;
833	sa.sa_handler = sighandler;	1585	sa.sa_handler = sighandler;
834	sigfillset (&sa.sa_mask);	1586	sigfillset (&sa.sa_mask);
835	sa.sa_flags = 0;	1587	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
836	sigaction (w->signum, &sa, 0);	1588	sigaction (w->signum, &sa, 0);
		1589	#endif
837	}	1590	}
838	}	1591	}
839		1592
840	void	1593	void
841	evsignal_stop (struct ev_signal *w)	1594	ev_signal_stop (EV_P_ struct ev_signal *w)
842	{	1595	{
843	ev_clear ((W)w);	1596	ev_clear_pending (EV_A_ (W)w);
844	if (!ev_is_active (w))	1597	if (expect_false (!ev_is_active (w)))
845	return;	1598	return;
846		1599
847	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1600	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
848	ev_stop ((W)w);	1601	ev_stop (EV_A_ (W)w);
849		1602
850	if (!signals [w->signum - 1].head)	1603	if (!signals [w->signum - 1].head)
851	signal (w->signum, SIG_DFL);	1604	signal (w->signum, SIG_DFL);
852	}	1605	}
853		1606
854	void evidle_start (struct ev_idle *w)	1607	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)	1608	ev_child_start (EV_P_ struct ev_child *w)
915	{	1609	{
		1610	#if EV_MULTIPLICITY
		1611	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1612	#endif
916	if (ev_is_active (w))	1613	if (expect_false (ev_is_active (w)))
917	return;	1614	return;
918		1615
919	ev_start ((W)w, 1);	1616	ev_start (EV_A_ (W)w, 1);
920	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1617	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
921	}	1618	}
922		1619
		1620	void
923	void evchild_stop (struct ev_child *w)	1621	ev_child_stop (EV_P_ struct ev_child *w)
924	{	1622	{
925	ev_clear ((W)w);	1623	ev_clear_pending (EV_A_ (W)w);
926	if (ev_is_active (w))	1624	if (expect_false (!ev_is_active (w)))
927	return;	1625	return;
928		1626
929	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1627	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	ev_stop ((W)w);	1628	ev_stop (EV_A_ (W)w);
931	}	1629	}
932		1630
933	/*****************************************************************************/	1631	/*****************************************************************************/
934		1632
935	struct ev_once	1633	struct ev_once
…		…
939	void (*cb)(int revents, void *arg);	1637	void (*cb)(int revents, void *arg);
940	void *arg;	1638	void *arg;
941	};	1639	};
942		1640
943	static void	1641	static void
944	once_cb (struct ev_once *once, int revents)	1642	once_cb (EV_P_ struct ev_once *once, int revents)
945	{	1643	{
946	void (*cb)(int revents, void *arg) = once->cb;	1644	void (*cb)(int revents, void *arg) = once->cb;
947	void *arg = once->arg;	1645	void *arg = once->arg;
948		1646
949	evio_stop (&once->io);	1647	ev_io_stop (EV_A_ &once->io);
950	evtimer_stop (&once->to);	1648	ev_timer_stop (EV_A_ &once->to);
951	free (once);	1649	ev_free (once);
952		1650
953	cb (revents, arg);	1651	cb (revents, arg);
954	}	1652	}
955		1653
956	static void	1654	static void
957	once_cb_io (struct ev_io *w, int revents)	1655	once_cb_io (EV_P_ struct ev_io *w, int revents)
958	{	1656	{
959	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1657	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
960	}	1658	}
961		1659
962	static void	1660	static void
963	once_cb_to (struct ev_timer *w, int revents)	1661	once_cb_to (EV_P_ struct ev_timer *w, int revents)
964	{	1662	{
965	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1663	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
966	}	1664	}
967		1665
968	void	1666	void
969	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1667	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
970	{	1668	{
971	struct ev_once *once = malloc (sizeof (struct ev_once));	1669	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
972		1670
973	if (!once)	1671	if (expect_false (!once))
974	cb (EV_ERROR, arg);	1672	{
975	else	1673	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1674	return;
976	{	1675	}
		1676
977	once->cb = cb;	1677	once->cb = cb;
978	once->arg = arg;	1678	once->arg = arg;
979		1679
980	evw_init (&once->io, once_cb_io);	1680	ev_init (&once->io, once_cb_io);
981
982	if (fd >= 0)	1681	if (fd >= 0)
983	{	1682	{
984	evio_set (&once->io, fd, events);	1683	ev_io_set (&once->io, fd, events);
985	evio_start (&once->io);	1684	ev_io_start (EV_A_ &once->io);
986	}	1685	}
987		1686
988	evw_init (&once->to, once_cb_to);	1687	ev_init (&once->to, once_cb_to);
989
990	if (timeout >= 0.)	1688	if (timeout >= 0.)
991	{	1689	{
992	evtimer_set (&once->to, timeout, 0.);	1690	ev_timer_set (&once->to, timeout, 0.);
993	evtimer_start (&once->to);	1691	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	{	1692	}
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	}	1693	}
1075		1694
		1695	#ifdef __cplusplus
		1696	}
1076	#endif	1697	#endif
1077		1698
1078
1079
1080

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