[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.21 by root, Wed Oct 31 18:37:38 2007 UTC vs.
Revision 1.132 by root, Fri Nov 23 10:36:30 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/time.h>	106	#include <sys/types.h>
42	#include <time.h>	107	#include <time.h>
43		108
44	#ifndef HAVE_MONOTONIC	109	#include <signal.h>
45	# ifdef CLOCK_MONOTONIC	110
46	# 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
47	# endif	120	# endif
48	#endif	121	#endif
49		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
50	#ifndef HAVE_SELECT	133	#ifndef EV_USE_SELECT
51	# 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
52	#endif	142	# endif
		143	#endif
53		144
54	#ifndef HAVE_EPOLL	145	#ifndef EV_USE_EPOLL
55	# define HAVE_EPOLL 0	146	# define EV_USE_EPOLL 0
56	#endif	147	#endif
57		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	#ifndef CLOCK_MONOTONIC
		160	# undef EV_USE_MONOTONIC
		161	# define EV_USE_MONOTONIC 0
		162	#endif
		163
58	#ifndef HAVE_REALTIME	164	#ifndef CLOCK_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	165	# undef EV_USE_REALTIME
		166	# define EV_USE_REALTIME 0
60	#endif	167	#endif
		168
		169	#if EV_SELECT_IS_WINSOCKET
		170	# include <winsock.h>
		171	#endif
		172
		173	/**/
61		174
62	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	175	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63	#define MAX_BLOCKTIME 60.	176	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		177	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		178	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds */
64		179
		180	#ifdef EV_H
		181	# include EV_H
		182	#else
65	#include "ev.h"	183	# include "ev.h"
		184	#endif
		185
		186	#if __GNUC__ >= 3
		187	# define expect(expr,value) __builtin_expect ((expr),(value))
		188	# define inline static inline
		189	#else
		190	# define expect(expr,value) (expr)
		191	# define inline static
		192	#endif
		193
		194	#define expect_false(expr) expect ((expr) != 0, 0)
		195	#define expect_true(expr) expect ((expr) != 0, 1)
		196
		197	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		198	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		199
		200	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		201	#define EMPTY2(a,b) /* used to suppress some warnings */
66		202
67	typedef struct ev_watcher *W;	203	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	204	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	205	typedef struct ev_watcher_time *WT;
70		206
71	static ev_tstamp now, diff; /* monotonic clock */	207	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		208
		209	#ifdef _WIN32
		210	# include "ev_win32.c"
		211	#endif
		212
		213	/*****************************************************************************/
		214
		215	static void (syserr_cb)(const char msg);
		216
		217	void ev_set_syserr_cb (void (cb)(const char msg))
		218	{
		219	syserr_cb = cb;
		220	}
		221
		222	static void
		223	syserr (const char *msg)
		224	{
		225	if (!msg)
		226	msg = "(libev) system error";
		227
		228	if (syserr_cb)
		229	syserr_cb (msg);
		230	else
		231	{
		232	perror (msg);
		233	abort ();
		234	}
		235	}
		236
		237	static void (alloc)(void *ptr, long size);
		238
		239	void ev_set_allocator (void (cb)(void *ptr, long size))
		240	{
		241	alloc = cb;
		242	}
		243
		244	static void *
		245	ev_realloc (void *ptr, long size)
		246	{
		247	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		248
		249	if (!ptr && size)
		250	{
		251	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		252	abort ();
		253	}
		254
		255	return ptr;
		256	}
		257
		258	#define ev_malloc(size) ev_realloc (0, (size))
		259	#define ev_free(ptr) ev_realloc ((ptr), 0)
		260
		261	/*****************************************************************************/
		262
		263	typedef struct
		264	{
		265	WL head;
		266	unsigned char events;
		267	unsigned char reify;
		268	#if EV_SELECT_IS_WINSOCKET
		269	SOCKET handle;
		270	#endif
		271	} ANFD;
		272
		273	typedef struct
		274	{
		275	W w;
		276	int events;
		277	} ANPENDING;
		278
		279	#if EV_MULTIPLICITY
		280
		281	struct ev_loop
		282	{
		283	ev_tstamp ev_rt_now;
		284	#define ev_rt_now ((loop)->ev_rt_now)
		285	#define VAR(name,decl) decl;
		286	#include "ev_vars.h"
		287	#undef VAR
		288	};
		289	#include "ev_wrap.h"
		290
		291	static struct ev_loop default_loop_struct;
		292	struct ev_loop *ev_default_loop_ptr;
		293
		294	#else
		295
72	ev_tstamp ev_now;	296	ev_tstamp ev_rt_now;
73	int ev_method;	297	#define VAR(name,decl) static decl;
		298	#include "ev_vars.h"
		299	#undef VAR
74		300
75	static int have_monotonic; /* runtime */	301	static int ev_default_loop_ptr;
76		302
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	303	#endif
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		304
81	/*****************************************************************************/	305	/*****************************************************************************/
82		306
83	ev_tstamp	307	ev_tstamp
84	ev_time (void)	308	ev_time (void)
85	{	309	{
86	#if HAVE_REALTIME	310	#if EV_USE_REALTIME
87	struct timespec ts;	311	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	312	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	313	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	314	#else
91	struct timeval tv;	315	struct timeval tv;
92	gettimeofday (&tv, 0);	316	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	317	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	318	#endif
95	}	319	}
96		320
97	static ev_tstamp	321	inline ev_tstamp
98	get_clock (void)	322	get_clock (void)
99	{	323	{
100	#if HAVE_MONOTONIC	324	#if EV_USE_MONOTONIC
101	if (have_monotonic)	325	if (expect_true (have_monotonic))
102	{	326	{
103	struct timespec ts;	327	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	328	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	329	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	330	}
107	#endif	331	#endif
108		332
109	return ev_time ();	333	return ev_time ();
110	}	334	}
111		335
		336	#if EV_MULTIPLICITY
		337	ev_tstamp
		338	ev_now (EV_P)
		339	{
		340	return ev_rt_now;
		341	}
		342	#endif
		343
		344	#define array_roundsize(type,n) (((n) \| 4) & ~3)
		345
112	#define array_needsize(base,cur,cnt,init) \	346	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	347	if (expect_false ((cnt) > cur)) \
114	{ \	348	{ \
115	int newcnt = cur ? cur << 1 : 16; \	349	int newcnt = cur; \
		350	do \
		351	{ \
		352	newcnt = array_roundsize (type, newcnt << 1); \
		353	} \
		354	while ((cnt) > newcnt); \
		355	\
116	base = realloc (base, sizeof (base) (newcnt)); \	356	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
117	init (base + cur, newcnt - cur); \	357	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	358	cur = newcnt; \
119	}	359	}
		360
		361	#define array_slim(type,stem) \
		362	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		363	{ \
		364	stem ## max = array_roundsize (stem ## cnt >> 1); \
		365	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		366	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		367	}
		368
		369	#define array_free(stem, idx) \
		370	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		371
121	/*****************************************************************************/	372	/*****************************************************************************/
122		373
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	374	static void
136	anfds_init (ANFD *base, int count)	375	anfds_init (ANFD *base, int count)
137	{	376	{
138	while (count--)	377	while (count--)
139	{	378	{
140	base->head = 0;	379	base->head = 0;
141	base->wev = base->rev = EV_NONE;	380	base->events = EV_NONE;
		381	base->reify = 0;
		382
142	++base;	383	++base;
143	}	384	}
144	}	385	}
145		386
146	typedef struct	387	void
		388	ev_feed_event (EV_P_ void *w, int revents)
147	{	389	{
148	W w;	390	W w_ = (W)w;
149	int events;
150	} ANPENDING;
151		391
152	static ANPENDING *pendings;	392	if (expect_false (w_->pending))
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{	393	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	394	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		395	return;
164	}	396	}
165	}
166		397
		398	w_->pending = ++pendingcnt [ABSPRI (w_)];
		399	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		400	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		401	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		402	}
		403
167	static void	404	static void
		405	queue_events (EV_P_ W *events, int eventcnt, int type)
		406	{
		407	int i;
		408
		409	for (i = 0; i < eventcnt; ++i)
		410	ev_feed_event (EV_A_ events [i], type);
		411	}
		412
		413	inline void
168	fd_event (int fd, int events)	414	fd_event (EV_P_ int fd, int revents)
169	{	415	{
170	ANFD *anfd = anfds + fd;	416	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	417	struct ev_io *w;
172		418
173	for (w = anfd->head; w; w = w->next)	419	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	420	{
175	int ev = w->events & events;	421	int ev = w->events & revents;
176		422
177	if (ev)	423	if (ev)
178	event ((W)w, ev);	424	ev_feed_event (EV_A_ (W)w, ev);
179	}	425	}
180	}	426	}
181		427
182	static void	428	void
183	queue_events (W *events, int eventcnt, int type)	429	ev_feed_fd_event (EV_P_ int fd, int revents)
184	{	430	{
185	int i;	431	fd_event (EV_A_ fd, revents);
186
187	for (i = 0; i < eventcnt; ++i)
188	event (events [i], type);
189	}
190
191	/* called on EBADF to verify fds */
192	static void
193	fd_recheck ()
194	{
195	int fd;
196
197	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)
201	evio_stop (anfds [fd].head);
202	}	432	}
203		433
204	/*****************************************************************************/	434	/*****************************************************************************/
205		435
206	static struct ev_timer **timers;	436	inline void
207	static int timermax, timercnt;	437	fd_reify (EV_P)
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void
213	upheap (WT *timers, int k)
214	{
215	WT w = timers [k];
216
217	while (k && timers [k >> 1]->at > w->at)
218	{
219	timers [k] = timers [k >> 1];
220	timers [k]->active = k + 1;
221	k >>= 1;
222	}
223
224	timers [k] = w;
225	timers [k]->active = k + 1;
226
227	}
228
229	static void
230	downheap (WT *timers, int N, int k)
231	{
232	WT w = timers [k];
233
234	while (k < (N >> 1))
235	{
236	int j = k << 1;
237
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239	++j;
240
241	if (w->at <= timers [j]->at)
242	break;
243
244	timers [k] = timers [j];
245	timers [k]->active = k + 1;
246	k = j;
247	}
248
249	timers [k] = w;
250	timers [k]->active = k + 1;
251	}
252
253	/*****************************************************************************/
254
255	typedef struct
256	{
257	struct ev_signal *head;
258	sig_atomic_t gotsig;
259	} ANSIG;
260
261	static ANSIG *signals;
262	static int signalmax;
263
264	static int sigpipe [2];
265	static sig_atomic_t gotsig;
266	static struct ev_io sigev;
267
268	static void
269	signals_init (ANSIG *base, int count)
270	{
271	while (count--)
272	{
273	base->head = 0;
274	base->gotsig = 0;
275	++base;
276	}
277	}
278
279	static void
280	sighandler (int signum)
281	{
282	signals [signum - 1].gotsig = 1;
283
284	if (!gotsig)
285	{
286	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);
288	}
289	}
290
291	static void
292	sigcb (struct ev_io *iow, int revents)
293	{
294	struct ev_signal *w;
295	int sig;
296
297	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299
300	for (sig = signalmax; sig--; )
301	if (signals [sig].gotsig)
302	{
303	signals [sig].gotsig = 0;
304
305	for (w = signals [sig].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);
307	}
308	}
309
310	static void
311	siginit (void)
312	{
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315
316	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
319
320	evio_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);
322	}
323
324	/*****************************************************************************/
325
326	static struct ev_idle **idles;
327	static int idlemax, idlecnt;
328
329	static struct ev_prepare **prepares;
330	static int preparemax, preparecnt;
331
332	static struct ev_check **checks;
333	static int checkmax, checkcnt;
334
335	/*****************************************************************************/
336
337	#if HAVE_EPOLL
338	# include "ev_epoll.c"
339	#endif
340	#if HAVE_SELECT
341	# include "ev_select.c"
342	#endif
343
344	int ev_init (int flags)
345	{
346	#if HAVE_MONOTONIC
347	{
348	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;
351	}
352	#endif
353
354	ev_now = ev_time ();
355	now = get_clock ();
356	diff = ev_now - now;
357
358	if (pipe (sigpipe))
359	return 0;
360
361	ev_method = EVMETHOD_NONE;
362	#if HAVE_EPOLL
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364	#endif
365	#if HAVE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);
367	#endif
368
369	if (ev_method)
370	{
371	evw_init (&sigev, sigcb);
372	siginit ();
373	}
374
375	return ev_method;
376	}
377
378	/*****************************************************************************/
379
380	void ev_prefork (void)
381	{
382	/* nop */
383	}
384
385	void ev_postfork_parent (void)
386	{
387	/* nop */
388	}
389
390	void ev_postfork_child (void)
391	{
392	#if HAVE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();
395	#endif
396
397	evio_stop (&sigev);
398	close (sigpipe [0]);
399	close (sigpipe [1]);
400	pipe (sigpipe);
401	siginit ();
402	}
403
404	/*****************************************************************************/
405
406	static void
407	fd_reify (void)
408	{	438	{
409	int i;	439	int i;
410		440
411	for (i = 0; i < fdchangecnt; ++i)	441	for (i = 0; i < fdchangecnt; ++i)
412	{	442	{
413	int fd = fdchanges [i];	443	int fd = fdchanges [i];
414	ANFD *anfd = anfds + fd;	444	ANFD *anfd = anfds + fd;
415	struct ev_io *w;	445	struct ev_io *w;
416		446
417	int wev = 0;	447	int events = 0;
418		448
419	for (w = anfd->head; w; w = w->next)	449	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
420	wev \|= w->events;	450	events \|= w->events;
421		451
422	if (anfd->wev != wev)	452	#if EV_SELECT_IS_WINSOCKET
		453	if (events)
423	{	454	{
424	method_modify (fd, anfd->wev, wev);	455	unsigned long argp;
425	anfd->wev = wev;	456	anfd->handle = _get_osfhandle (fd);
		457	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
426	}	458	}
		459	#endif
		460
		461	anfd->reify = 0;
		462
		463	backend_modify (EV_A_ fd, anfd->events, events);
		464	anfd->events = events;
427	}	465	}
428		466
429	fdchangecnt = 0;	467	fdchangecnt = 0;
430	}	468	}
431		469
432	static void	470	static void
433	call_pending ()	471	fd_change (EV_P_ int fd)
434	{	472	{
435	while (pendingcnt)	473	if (expect_false (anfds [fd].reify))
		474	return;
		475
		476	anfds [fd].reify = 1;
		477
		478	++fdchangecnt;
		479	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		480	fdchanges [fdchangecnt - 1] = fd;
		481	}
		482
		483	static void
		484	fd_kill (EV_P_ int fd)
		485	{
		486	struct ev_io *w;
		487
		488	while ((w = (struct ev_io *)anfds [fd].head))
		489	{
		490	ev_io_stop (EV_A_ w);
		491	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		492	}
		493	}
		494
		495	inline int
		496	fd_valid (int fd)
		497	{
		498	#ifdef _WIN32
		499	return _get_osfhandle (fd) != -1;
		500	#else
		501	return fcntl (fd, F_GETFD) != -1;
		502	#endif
		503	}
		504
		505	/* called on EBADF to verify fds */
		506	static void
		507	fd_ebadf (EV_P)
		508	{
		509	int fd;
		510
		511	for (fd = 0; fd < anfdmax; ++fd)
		512	if (anfds [fd].events)
		513	if (!fd_valid (fd) == -1 && errno == EBADF)
		514	fd_kill (EV_A_ fd);
		515	}
		516
		517	/* called on ENOMEM in select/poll to kill some fds and retry */
		518	static void
		519	fd_enomem (EV_P)
		520	{
		521	int fd;
		522
		523	for (fd = anfdmax; fd--; )
		524	if (anfds [fd].events)
436	{	525	{
437	ANPENDING *p = pendings + --pendingcnt;	526	fd_kill (EV_A_ fd);
		527	return;
		528	}
		529	}
438		530
439	if (p->w)	531	/* usually called after fork if backend needs to re-arm all fds from scratch */
		532	static void
		533	fd_rearm_all (EV_P)
		534	{
		535	int fd;
		536
		537	/* this should be highly optimised to not do anything but set a flag */
		538	for (fd = 0; fd < anfdmax; ++fd)
		539	if (anfds [fd].events)
		540	{
		541	anfds [fd].events = 0;
		542	fd_change (EV_A_ fd);
		543	}
		544	}
		545
		546	/*****************************************************************************/
		547
		548	static void
		549	upheap (WT *heap, int k)
		550	{
		551	WT w = heap [k];
		552
		553	while (k && heap [k >> 1]->at > w->at)
		554	{
		555	heap [k] = heap [k >> 1];
		556	((W)heap [k])->active = k + 1;
		557	k >>= 1;
		558	}
		559
		560	heap [k] = w;
		561	((W)heap [k])->active = k + 1;
		562
		563	}
		564
		565	static void
		566	downheap (WT *heap, int N, int k)
		567	{
		568	WT w = heap [k];
		569
		570	while (k < (N >> 1))
		571	{
		572	int j = k << 1;
		573
		574	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		575	++j;
		576
		577	if (w->at <= heap [j]->at)
		578	break;
		579
		580	heap [k] = heap [j];
		581	((W)heap [k])->active = k + 1;
		582	k = j;
		583	}
		584
		585	heap [k] = w;
		586	((W)heap [k])->active = k + 1;
		587	}
		588
		589	inline void
		590	adjustheap (WT *heap, int N, int k)
		591	{
		592	upheap (heap, k);
		593	downheap (heap, N, k);
		594	}
		595
		596	/*****************************************************************************/
		597
		598	typedef struct
		599	{
		600	WL head;
		601	sig_atomic_t volatile gotsig;
		602	} ANSIG;
		603
		604	static ANSIG *signals;
		605	static int signalmax;
		606
		607	static int sigpipe [2];
		608	static sig_atomic_t volatile gotsig;
		609	static struct ev_io sigev;
		610
		611	static void
		612	signals_init (ANSIG *base, int count)
		613	{
		614	while (count--)
		615	{
		616	base->head = 0;
		617	base->gotsig = 0;
		618
		619	++base;
		620	}
		621	}
		622
		623	static void
		624	sighandler (int signum)
		625	{
		626	#if _WIN32
		627	signal (signum, sighandler);
		628	#endif
		629
		630	signals [signum - 1].gotsig = 1;
		631
		632	if (!gotsig)
		633	{
		634	int old_errno = errno;
		635	gotsig = 1;
		636	write (sigpipe [1], &signum, 1);
		637	errno = old_errno;
		638	}
		639	}
		640
		641	void
		642	ev_feed_signal_event (EV_P_ int signum)
		643	{
		644	WL w;
		645
		646	#if EV_MULTIPLICITY
		647	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		648	#endif
		649
		650	--signum;
		651
		652	if (signum < 0 \|\| signum >= signalmax)
		653	return;
		654
		655	signals [signum].gotsig = 0;
		656
		657	for (w = signals [signum].head; w; w = w->next)
		658	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		659	}
		660
		661	static void
		662	sigcb (EV_P_ struct ev_io *iow, int revents)
		663	{
		664	int signum;
		665
		666	read (sigpipe [0], &revents, 1);
		667	gotsig = 0;
		668
		669	for (signum = signalmax; signum--; )
		670	if (signals [signum].gotsig)
		671	ev_feed_signal_event (EV_A_ signum + 1);
		672	}
		673
		674	static void
		675	fd_intern (int fd)
		676	{
		677	#ifdef _WIN32
		678	int arg = 1;
		679	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		680	#else
		681	fcntl (fd, F_SETFD, FD_CLOEXEC);
		682	fcntl (fd, F_SETFL, O_NONBLOCK);
		683	#endif
		684	}
		685
		686	static void
		687	siginit (EV_P)
		688	{
		689	fd_intern (sigpipe [0]);
		690	fd_intern (sigpipe [1]);
		691
		692	ev_io_set (&sigev, sigpipe [0], EV_READ);
		693	ev_io_start (EV_A_ &sigev);
		694	ev_unref (EV_A); /* child watcher should not keep loop alive */
		695	}
		696
		697	/*****************************************************************************/
		698
		699	static struct ev_child *childs [PID_HASHSIZE];
		700
		701	#ifndef _WIN32
		702
		703	static struct ev_signal childev;
		704
		705	#ifndef WCONTINUED
		706	# define WCONTINUED 0
		707	#endif
		708
		709	static void
		710	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		711	{
		712	struct ev_child *w;
		713
		714	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		715	if (w->pid == pid \|\| !w->pid)
		716	{
		717	ev_priority (w) = ev_priority (sw); /* need to do it now */
		718	w->rpid = pid;
		719	w->rstatus = status;
		720	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		721	}
		722	}
		723
		724	static void
		725	childcb (EV_P_ struct ev_signal *sw, int revents)
		726	{
		727	int pid, status;
		728
		729	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		730	{
		731	/* make sure we are called again until all childs have been reaped */
		732	/* we need to do it this way so that the callback gets called before we continue */
		733	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		734
		735	child_reap (EV_A_ sw, pid, pid, status);
		736	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		737	}
		738	}
		739
		740	#endif
		741
		742	/*****************************************************************************/
		743
		744	#if EV_USE_PORT
		745	# include "ev_port.c"
		746	#endif
		747	#if EV_USE_KQUEUE
		748	# include "ev_kqueue.c"
		749	#endif
		750	#if EV_USE_EPOLL
		751	# include "ev_epoll.c"
		752	#endif
		753	#if EV_USE_POLL
		754	# include "ev_poll.c"
		755	#endif
		756	#if EV_USE_SELECT
		757	# include "ev_select.c"
		758	#endif
		759
		760	int
		761	ev_version_major (void)
		762	{
		763	return EV_VERSION_MAJOR;
		764	}
		765
		766	int
		767	ev_version_minor (void)
		768	{
		769	return EV_VERSION_MINOR;
		770	}
		771
		772	/* return true if we are running with elevated privileges and should ignore env variables */
		773	static int
		774	enable_secure (void)
		775	{
		776	#ifdef _WIN32
		777	return 0;
		778	#else
		779	return getuid () != geteuid ()
		780	\|\| getgid () != getegid ();
		781	#endif
		782	}
		783
		784	unsigned int
		785	ev_supported_backends (void)
		786	{
		787	unsigned int flags = 0;
		788
		789	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		790	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		791	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		792	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		793	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		794
		795	return flags;
		796	}
		797
		798	unsigned int
		799	ev_recommended_backends (void)
		800	{
		801	unsigned int flags = ev_supported_backends ();
		802
		803	#ifndef __NetBSD__
		804	/* kqueue is borked on everything but netbsd apparently */
		805	/* it usually doesn't work correctly on anything but sockets and pipes */
		806	flags &= ~EVBACKEND_KQUEUE;
		807	#endif
		808	#ifdef __APPLE__
		809	// flags &= ~EVBACKEND_KQUEUE; for documentation
		810	flags &= ~EVBACKEND_POLL;
		811	#endif
		812
		813	return flags;
		814	}
		815
		816	unsigned int
		817	ev_backend (EV_P)
		818	{
		819	return backend;
		820	}
		821
		822	static void
		823	loop_init (EV_P_ unsigned int flags)
		824	{
		825	if (!backend)
		826	{
		827	#if EV_USE_MONOTONIC
		828	{
		829	struct timespec ts;
		830	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		831	have_monotonic = 1;
		832	}
		833	#endif
		834
		835	ev_rt_now = ev_time ();
		836	mn_now = get_clock ();
		837	now_floor = mn_now;
		838	rtmn_diff = ev_rt_now - mn_now;
		839
		840	if (!(flags & EVFLAG_NOENV)
		841	&& !enable_secure ()
		842	&& getenv ("LIBEV_FLAGS"))
		843	flags = atoi (getenv ("LIBEV_FLAGS"));
		844
		845	if (!(flags & 0x0000ffffUL))
		846	flags \|= ev_recommended_backends ();
		847
		848	backend = 0;
		849	#if EV_USE_PORT
		850	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		851	#endif
		852	#if EV_USE_KQUEUE
		853	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		854	#endif
		855	#if EV_USE_EPOLL
		856	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		857	#endif
		858	#if EV_USE_POLL
		859	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		860	#endif
		861	#if EV_USE_SELECT
		862	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		863	#endif
		864
		865	ev_init (&sigev, sigcb);
		866	ev_set_priority (&sigev, EV_MAXPRI);
		867	}
		868	}
		869
		870	static void
		871	loop_destroy (EV_P)
		872	{
		873	int i;
		874
		875	#if EV_USE_PORT
		876	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		877	#endif
		878	#if EV_USE_KQUEUE
		879	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		880	#endif
		881	#if EV_USE_EPOLL
		882	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		883	#endif
		884	#if EV_USE_POLL
		885	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		886	#endif
		887	#if EV_USE_SELECT
		888	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		889	#endif
		890
		891	for (i = NUMPRI; i--; )
		892	array_free (pending, [i]);
		893
		894	/* have to use the microsoft-never-gets-it-right macro */
		895	array_free (fdchange, EMPTY0);
		896	array_free (timer, EMPTY0);
		897	#if EV_PERIODICS
		898	array_free (periodic, EMPTY0);
		899	#endif
		900	array_free (idle, EMPTY0);
		901	array_free (prepare, EMPTY0);
		902	array_free (check, EMPTY0);
		903
		904	backend = 0;
		905	}
		906
		907	static void
		908	loop_fork (EV_P)
		909	{
		910	#if EV_USE_PORT
		911	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		912	#endif
		913	#if EV_USE_KQUEUE
		914	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		915	#endif
		916	#if EV_USE_EPOLL
		917	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		918	#endif
		919
		920	if (ev_is_active (&sigev))
		921	{
		922	/* default loop */
		923
		924	ev_ref (EV_A);
		925	ev_io_stop (EV_A_ &sigev);
		926	close (sigpipe [0]);
		927	close (sigpipe [1]);
		928
		929	while (pipe (sigpipe))
		930	syserr ("(libev) error creating pipe");
		931
		932	siginit (EV_A);
		933	}
		934
		935	postfork = 0;
		936	}
		937
		938	#if EV_MULTIPLICITY
		939	struct ev_loop *
		940	ev_loop_new (unsigned int flags)
		941	{
		942	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		943
		944	memset (loop, 0, sizeof (struct ev_loop));
		945
		946	loop_init (EV_A_ flags);
		947
		948	if (ev_backend (EV_A))
		949	return loop;
		950
		951	return 0;
		952	}
		953
		954	void
		955	ev_loop_destroy (EV_P)
		956	{
		957	loop_destroy (EV_A);
		958	ev_free (loop);
		959	}
		960
		961	void
		962	ev_loop_fork (EV_P)
		963	{
		964	postfork = 1;
		965	}
		966
		967	#endif
		968
		969	#if EV_MULTIPLICITY
		970	struct ev_loop *
		971	ev_default_loop_init (unsigned int flags)
		972	#else
		973	int
		974	ev_default_loop (unsigned int flags)
		975	#endif
		976	{
		977	if (sigpipe [0] == sigpipe [1])
		978	if (pipe (sigpipe))
		979	return 0;
		980
		981	if (!ev_default_loop_ptr)
		982	{
		983	#if EV_MULTIPLICITY
		984	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		985	#else
		986	ev_default_loop_ptr = 1;
		987	#endif
		988
		989	loop_init (EV_A_ flags);
		990
		991	if (ev_backend (EV_A))
440	{	992	{
441	p->w->pending = 0;	993	siginit (EV_A);
442	p->w->cb (p->w, p->events);	994
		995	#ifndef _WIN32
		996	ev_signal_init (&childev, childcb, SIGCHLD);
		997	ev_set_priority (&childev, EV_MAXPRI);
		998	ev_signal_start (EV_A_ &childev);
		999	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1000	#endif
443	}	1001	}
		1002	else
		1003	ev_default_loop_ptr = 0;
		1004	}
		1005
		1006	return ev_default_loop_ptr;
		1007	}
		1008
		1009	void
		1010	ev_default_destroy (void)
		1011	{
		1012	#if EV_MULTIPLICITY
		1013	struct ev_loop *loop = ev_default_loop_ptr;
		1014	#endif
		1015
		1016	#ifndef _WIN32
		1017	ev_ref (EV_A); /* child watcher */
		1018	ev_signal_stop (EV_A_ &childev);
		1019	#endif
		1020
		1021	ev_ref (EV_A); /* signal watcher */
		1022	ev_io_stop (EV_A_ &sigev);
		1023
		1024	close (sigpipe [0]); sigpipe [0] = 0;
		1025	close (sigpipe [1]); sigpipe [1] = 0;
		1026
		1027	loop_destroy (EV_A);
		1028	}
		1029
		1030	void
		1031	ev_default_fork (void)
		1032	{
		1033	#if EV_MULTIPLICITY
		1034	struct ev_loop *loop = ev_default_loop_ptr;
		1035	#endif
		1036
		1037	if (backend)
		1038	postfork = 1;
		1039	}
		1040
		1041	/*****************************************************************************/
		1042
		1043	static int
		1044	any_pending (EV_P)
		1045	{
		1046	int pri;
		1047
		1048	for (pri = NUMPRI; pri--; )
		1049	if (pendingcnt [pri])
		1050	return 1;
		1051
		1052	return 0;
		1053	}
		1054
		1055	inline void
		1056	call_pending (EV_P)
		1057	{
		1058	int pri;
		1059
		1060	for (pri = NUMPRI; pri--; )
		1061	while (pendingcnt [pri])
		1062	{
		1063	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1064
		1065	if (expect_true (p->w))
		1066	{
		1067	p->w->pending = 0;
		1068	EV_CB_INVOKE (p->w, p->events);
		1069	}
444	}	1070	}
445	}	1071	}
446		1072
447	static void	1073	inline void
448	timers_reify ()	1074	timers_reify (EV_P)
449	{	1075	{
450	while (timercnt && timers [0]->at <= now)	1076	while (timercnt && ((WT)timers [0])->at <= mn_now)
451	{	1077	{
452	struct ev_timer *w = timers [0];	1078	struct ev_timer *w = timers [0];
453		1079
454	event ((W)w, EV_TIMEOUT);	1080	assert (("inactive timer on timer heap detected", ev_is_active (w)));
455		1081
456	/* first reschedule or stop timer */	1082	/* first reschedule or stop timer */
457	if (w->repeat)	1083	if (w->repeat)
458	{	1084	{
		1085	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1086
459	w->at = now + w->repeat;	1087	((WT)w)->at += w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));	1088	if (((WT)w)->at < mn_now)
		1089	((WT)w)->at = mn_now;
		1090
461	downheap ((WT *)timers, timercnt, 0);	1091	downheap ((WT *)timers, timercnt, 0);
462	}	1092	}
463	else	1093	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	1094	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		1095
468	static void	1096	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1097	}
		1098	}
		1099
		1100	#if EV_PERIODICS
		1101	inline void
469	periodics_reify ()	1102	periodics_reify (EV_P)
470	{	1103	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	1104	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
472	{	1105	{
473	struct ev_periodic *w = periodics [0];	1106	struct ev_periodic *w = periodics [0];
474		1107
		1108	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1109
475	/* first reschedule or stop timer */	1110	/* first reschedule or stop timer */
476	if (w->interval)	1111	if (w->reschedule_cb)
477	{	1112	{
		1113	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1114	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1115	downheap ((WT *)periodics, periodiccnt, 0);
		1116	}
		1117	else if (w->interval)
		1118	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1119	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
479	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1120	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
480	downheap ((WT *)periodics, periodiccnt, 0);	1121	downheap ((WT *)periodics, periodiccnt, 0);
481	}	1122	}
482	else	1123	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	1124	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		1125
485	event ((W)w, EV_TIMEOUT);	1126	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486	}	1127	}
487	}	1128	}
488		1129
489	static void	1130	static void
490	periodics_reschedule (ev_tstamp diff)	1131	periodics_reschedule (EV_P)
491	{	1132	{
492	int i;	1133	int i;
493		1134
494	/* adjust periodics after time jump */	1135	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	1136	for (i = 0; i < periodiccnt; ++i)
496	{	1137	{
497	struct ev_periodic *w = periodics [i];	1138	struct ev_periodic *w = periodics [i];
498		1139
		1140	if (w->reschedule_cb)
		1141	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
499	if (w->interval)	1142	else if (w->interval)
		1143	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1144	}
		1145
		1146	/* now rebuild the heap */
		1147	for (i = periodiccnt >> 1; i--; )
		1148	downheap ((WT *)periodics, periodiccnt, i);
		1149	}
		1150	#endif
		1151
		1152	inline int
		1153	time_update_monotonic (EV_P)
		1154	{
		1155	mn_now = get_clock ();
		1156
		1157	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1158	{
		1159	ev_rt_now = rtmn_diff + mn_now;
		1160	return 0;
		1161	}
		1162	else
		1163	{
		1164	now_floor = mn_now;
		1165	ev_rt_now = ev_time ();
		1166	return 1;
		1167	}
		1168	}
		1169
		1170	inline void
		1171	time_update (EV_P)
		1172	{
		1173	int i;
		1174
		1175	#if EV_USE_MONOTONIC
		1176	if (expect_true (have_monotonic))
		1177	{
		1178	if (time_update_monotonic (EV_A))
500	{	1179	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1180	ev_tstamp odiff = rtmn_diff;
502		1181
503	if (fabs (diff) >= 1e-4)	1182	for (i = 4; --i; ) /* loop a few times, before making important decisions */
504	{	1183	{
505	evperiodic_stop (w);	1184	rtmn_diff = ev_rt_now - mn_now;
506	evperiodic_start (w);
507		1185
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1186	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1187	return; /* all is well */
		1188
		1189	ev_rt_now = ev_time ();
		1190	mn_now = get_clock ();
		1191	now_floor = mn_now;
509	}	1192	}
		1193
		1194	# if EV_PERIODICS
		1195	periodics_reschedule (EV_A);
		1196	# endif
		1197	/* no timer adjustment, as the monotonic clock doesn't jump */
		1198	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
510	}	1199	}
511	}	1200	}
512	}	1201	else
513		1202	#endif
514	static void	1203	{
515	time_update ()
516	{
517	int i;
518
519	ev_now = ev_time ();	1204	ev_rt_now = ev_time ();
520		1205
521	if (have_monotonic)	1206	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
522	{
523	ev_tstamp odiff = diff;
524
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
526	{	1207	{
527	now = get_clock ();	1208	#if EV_PERIODICS
528	diff = ev_now - now;
529
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)
531	return; /* all is well */
532
533	ev_now = ev_time ();
534	}
535
536	periodics_reschedule (diff - odiff);
537	/* no timer adjustment, as the monotonic clock doesn't jump */
538	}
539	else
540	{
541	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
542	{
543	periodics_reschedule (ev_now - now);	1209	periodics_reschedule (EV_A);
		1210	#endif
544		1211
545	/* adjust timers. this is easy, as the offset is the same for all */	1212	/* adjust timers. this is easy, as the offset is the same for all */
546	for (i = 0; i < timercnt; ++i)	1213	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	1214	((WT)timers [i])->at += ev_rt_now - mn_now;
548	}	1215	}
549		1216
550	now = ev_now;	1217	mn_now = ev_rt_now;
551	}	1218	}
552	}	1219	}
553		1220
554	int ev_loop_done;	1221	void
		1222	ev_ref (EV_P)
		1223	{
		1224	++activecnt;
		1225	}
555		1226
		1227	void
		1228	ev_unref (EV_P)
		1229	{
		1230	--activecnt;
		1231	}
		1232
		1233	static int loop_done;
		1234
		1235	void
556	void ev_loop (int flags)	1236	ev_loop (EV_P_ int flags)
557	{	1237	{
558	double block;	1238	double block;
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1239	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
560		1240
561	do	1241	while (activecnt)
562	{	1242	{
563	/* queue check watchers (and execute them) */	1243	/* queue check watchers (and execute them) */
564	if (preparecnt)	1244	if (expect_false (preparecnt))
565	{	1245	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1246	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	1247	call_pending (EV_A);
568	}	1248	}
569		1249
		1250	/* we might have forked, so reify kernel state if necessary */
		1251	if (expect_false (postfork))
		1252	loop_fork (EV_A);
		1253
570	/* update fd-related kernel structures */	1254	/* update fd-related kernel structures */
571	fd_reify ();	1255	fd_reify (EV_A);
572		1256
573	/* calculate blocking time */	1257	/* calculate blocking time */
574		1258
575	/* we only need this for !monotonic clockor timers, but as we basically	1259	/* we only need this for !monotonic clock or timers, but as we basically
576	always have timers, we just calculate it always */	1260	always have timers, we just calculate it always */
		1261	#if EV_USE_MONOTONIC
		1262	if (expect_true (have_monotonic))
		1263	time_update_monotonic (EV_A);
		1264	else
		1265	#endif
		1266	{
577	ev_now = ev_time ();	1267	ev_rt_now = ev_time ();
		1268	mn_now = ev_rt_now;
		1269	}
578		1270
579	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1271	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
580	block = 0.;	1272	block = 0.;
581	else	1273	else
582	{	1274	{
583	block = MAX_BLOCKTIME;	1275	block = MAX_BLOCKTIME;
584		1276
585	if (timercnt)	1277	if (timercnt)
586	{	1278	{
587	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1279	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
588	if (block > to) block = to;	1280	if (block > to) block = to;
589	}	1281	}
590		1282
		1283	#if EV_PERIODICS
591	if (periodiccnt)	1284	if (periodiccnt)
592	{	1285	{
593	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1286	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
594	if (block > to) block = to;	1287	if (block > to) block = to;
595	}	1288	}
		1289	#endif
596		1290
597	if (block < 0.) block = 0.;	1291	if (expect_false (block < 0.)) block = 0.;
598	}	1292	}
599		1293
600	method_poll (block);	1294	backend_poll (EV_A_ block);
601		1295
602	/* update ev_now, do magic */	1296	/* update ev_rt_now, do magic */
603	time_update ();	1297	time_update (EV_A);
604		1298
605	/* queue pending timers and reschedule them */	1299	/* queue pending timers and reschedule them */
606	timers_reify (); /* relative timers called last */	1300	timers_reify (EV_A); /* relative timers called last */
		1301	#if EV_PERIODICS
607	periodics_reify (); /* absolute timers called first */	1302	periodics_reify (EV_A); /* absolute timers called first */
		1303	#endif
608		1304
609	/* queue idle watchers unless io or timers are pending */	1305	/* queue idle watchers unless io or timers are pending */
610	if (!pendingcnt)	1306	if (idlecnt && !any_pending (EV_A))
611	queue_events ((W *)idles, idlecnt, EV_IDLE);	1307	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
612		1308
613	/* queue check watchers, to be executed first */	1309	/* queue check watchers, to be executed first */
614	if (checkcnt)	1310	if (expect_false (checkcnt))
615	queue_events ((W *)checks, checkcnt, EV_CHECK);	1311	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
616		1312
617	call_pending ();	1313	call_pending (EV_A);
618	}
619	while (!ev_loop_done);
620		1314
		1315	if (expect_false (loop_done))
		1316	break;
		1317	}
		1318
621	if (ev_loop_done != 2)	1319	if (loop_done != 2)
622	ev_loop_done = 0;	1320	loop_done = 0;
		1321	}
		1322
		1323	void
		1324	ev_unloop (EV_P_ int how)
		1325	{
		1326	loop_done = how;
623	}	1327	}
624		1328
625	/*****************************************************************************/	1329	/*****************************************************************************/
626		1330
627	static void	1331	inline void
628	wlist_add (WL *head, WL elem)	1332	wlist_add (WL *head, WL elem)
629	{	1333	{
630	elem->next = *head;	1334	elem->next = *head;
631	*head = elem;	1335	*head = elem;
632	}	1336	}
633		1337
634	static void	1338	inline void
635	wlist_del (WL *head, WL elem)	1339	wlist_del (WL *head, WL elem)
636	{	1340	{
637	while (*head)	1341	while (*head)
638	{	1342	{
639	if (*head == elem)	1343	if (*head == elem)
…		…
644		1348
645	head = &(*head)->next;	1349	head = &(*head)->next;
646	}	1350	}
647	}	1351	}
648		1352
649	static void	1353	inline void
650	ev_clear (W w)	1354	ev_clear_pending (EV_P_ W w)
651	{	1355	{
652	if (w->pending)	1356	if (w->pending)
653	{	1357	{
654	pendings [w->pending - 1].w = 0;	1358	pendings [ABSPRI (w)][w->pending - 1].w = 0;
655	w->pending = 0;	1359	w->pending = 0;
656	}	1360	}
657	}	1361	}
658		1362
659	static void	1363	inline void
660	ev_start (W w, int active)	1364	ev_start (EV_P_ W w, int active)
661	{	1365	{
		1366	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1367	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1368
662	w->active = active;	1369	w->active = active;
		1370	ev_ref (EV_A);
663	}	1371	}
664		1372
665	static void	1373	inline void
666	ev_stop (W w)	1374	ev_stop (EV_P_ W w)
667	{	1375	{
		1376	ev_unref (EV_A);
668	w->active = 0;	1377	w->active = 0;
669	}	1378	}
670		1379
671	/*****************************************************************************/	1380	/*****************************************************************************/
672		1381
673	void	1382	void
674	evio_start (struct ev_io *w)	1383	ev_io_start (EV_P_ struct ev_io *w)
675	{	1384	{
		1385	int fd = w->fd;
		1386
676	if (ev_is_active (w))	1387	if (expect_false (ev_is_active (w)))
677	return;	1388	return;
678		1389
679	int fd = w->fd;	1390	assert (("ev_io_start called with negative fd", fd >= 0));
680		1391
681	ev_start ((W)w, 1);	1392	ev_start (EV_A_ (W)w, 1);
682	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1393	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
683	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1394	wlist_add ((WL *)&anfds[fd].head, (WL)w);
684		1395
685	++fdchangecnt;	1396	fd_change (EV_A_ fd);
686	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
687	fdchanges [fdchangecnt - 1] = fd;
688	}	1397	}
689		1398
690	void	1399	void
691	evio_stop (struct ev_io *w)	1400	ev_io_stop (EV_P_ struct ev_io *w)
692	{	1401	{
693	ev_clear ((W)w);	1402	ev_clear_pending (EV_A_ (W)w);
694	if (!ev_is_active (w))	1403	if (expect_false (!ev_is_active (w)))
695	return;	1404	return;
696		1405
		1406	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1407
697	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1408	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
698	ev_stop ((W)w);	1409	ev_stop (EV_A_ (W)w);
699		1410
700	++fdchangecnt;	1411	fd_change (EV_A_ w->fd);
701	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
702	fdchanges [fdchangecnt - 1] = w->fd;
703	}	1412	}
704		1413
705	void	1414	void
706	evtimer_start (struct ev_timer *w)	1415	ev_timer_start (EV_P_ struct ev_timer *w)
707	{	1416	{
708	if (ev_is_active (w))	1417	if (expect_false (ev_is_active (w)))
709	return;	1418	return;
710		1419
711	w->at += now;	1420	((WT)w)->at += mn_now;
712		1421
713	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1422	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
714		1423
715	ev_start ((W)w, ++timercnt);	1424	ev_start (EV_A_ (W)w, ++timercnt);
716	array_needsize (timers, timermax, timercnt, );	1425	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
717	timers [timercnt - 1] = w;	1426	timers [timercnt - 1] = w;
718	upheap ((WT *)timers, timercnt - 1);	1427	upheap ((WT *)timers, timercnt - 1);
719	}
720		1428
		1429	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1430	}
		1431
721	void	1432	void
722	evtimer_stop (struct ev_timer *w)	1433	ev_timer_stop (EV_P_ struct ev_timer *w)
723	{	1434	{
724	ev_clear ((W)w);	1435	ev_clear_pending (EV_A_ (W)w);
725	if (!ev_is_active (w))	1436	if (expect_false (!ev_is_active (w)))
726	return;	1437	return;
727		1438
		1439	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1440
728	if (w->active < timercnt--)	1441	if (expect_true (((W)w)->active < timercnt--))
729	{	1442	{
730	timers [w->active - 1] = timers [timercnt];	1443	timers [((W)w)->active - 1] = timers [timercnt];
731	downheap ((WT *)timers, timercnt, w->active - 1);	1444	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
732	}	1445	}
733		1446
734	w->at = w->repeat;	1447	((WT)w)->at -= mn_now;
735		1448
736	ev_stop ((W)w);	1449	ev_stop (EV_A_ (W)w);
737	}	1450	}
738		1451
739	void	1452	void
740	evtimer_again (struct ev_timer *w)	1453	ev_timer_again (EV_P_ struct ev_timer *w)
741	{	1454	{
742	if (ev_is_active (w))	1455	if (ev_is_active (w))
743	{	1456	{
744	if (w->repeat)	1457	if (w->repeat)
745	{	1458	{
746	w->at = now + w->repeat;	1459	((WT)w)->at = mn_now + w->repeat;
747	downheap ((WT *)timers, timercnt, w->active - 1);	1460	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
748	}	1461	}
749	else	1462	else
750	evtimer_stop (w);	1463	ev_timer_stop (EV_A_ w);
751	}	1464	}
752	else if (w->repeat)	1465	else if (w->repeat)
		1466	{
		1467	w->at = w->repeat;
753	evtimer_start (w);	1468	ev_timer_start (EV_A_ w);
		1469	}
754	}	1470	}
755		1471
		1472	#if EV_PERIODICS
756	void	1473	void
757	evperiodic_start (struct ev_periodic *w)	1474	ev_periodic_start (EV_P_ struct ev_periodic *w)
758	{	1475	{
759	if (ev_is_active (w))	1476	if (expect_false (ev_is_active (w)))
760	return;	1477	return;
761		1478
762	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1479	if (w->reschedule_cb)
763		1480	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1481	else if (w->interval)
		1482	{
		1483	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
764	/* this formula differs from the one in periodic_reify because we do not always round up */	1484	/* this formula differs from the one in periodic_reify because we do not always round up */
765	if (w->interval)
766	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1485	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1486	}
767		1487
768	ev_start ((W)w, ++periodiccnt);	1488	ev_start (EV_A_ (W)w, ++periodiccnt);
769	array_needsize (periodics, periodicmax, periodiccnt, );	1489	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
770	periodics [periodiccnt - 1] = w;	1490	periodics [periodiccnt - 1] = w;
771	upheap ((WT *)periodics, periodiccnt - 1);	1491	upheap ((WT *)periodics, periodiccnt - 1);
772	}
773		1492
		1493	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1494	}
		1495
774	void	1496	void
775	evperiodic_stop (struct ev_periodic *w)	1497	ev_periodic_stop (EV_P_ struct ev_periodic *w)
776	{	1498	{
777	ev_clear ((W)w);	1499	ev_clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1500	if (expect_false (!ev_is_active (w)))
779	return;	1501	return;
780		1502
		1503	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1504
781	if (w->active < periodiccnt--)	1505	if (expect_true (((W)w)->active < periodiccnt--))
782	{	1506	{
783	periodics [w->active - 1] = periodics [periodiccnt];	1507	periodics [((W)w)->active - 1] = periodics [periodiccnt];
784	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1508	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
785	}	1509	}
786		1510
787	ev_stop ((W)w);	1511	ev_stop (EV_A_ (W)w);
788	}	1512	}
789		1513
790	void	1514	void
791	evsignal_start (struct ev_signal *w)	1515	ev_periodic_again (EV_P_ struct ev_periodic *w)
792	{	1516	{
		1517	/* TODO: use adjustheap and recalculation */
		1518	ev_periodic_stop (EV_A_ w);
		1519	ev_periodic_start (EV_A_ w);
		1520	}
		1521	#endif
		1522
		1523	void
		1524	ev_idle_start (EV_P_ struct ev_idle *w)
		1525	{
793	if (ev_is_active (w))	1526	if (expect_false (ev_is_active (w)))
794	return;	1527	return;
795		1528
		1529	ev_start (EV_A_ (W)w, ++idlecnt);
		1530	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1531	idles [idlecnt - 1] = w;
		1532	}
		1533
		1534	void
		1535	ev_idle_stop (EV_P_ struct ev_idle *w)
		1536	{
		1537	ev_clear_pending (EV_A_ (W)w);
		1538	if (expect_false (!ev_is_active (w)))
		1539	return;
		1540
		1541	idles [((W)w)->active - 1] = idles [--idlecnt];
		1542	ev_stop (EV_A_ (W)w);
		1543	}
		1544
		1545	void
		1546	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1547	{
		1548	if (expect_false (ev_is_active (w)))
		1549	return;
		1550
		1551	ev_start (EV_A_ (W)w, ++preparecnt);
		1552	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1553	prepares [preparecnt - 1] = w;
		1554	}
		1555
		1556	void
		1557	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1558	{
		1559	ev_clear_pending (EV_A_ (W)w);
		1560	if (expect_false (!ev_is_active (w)))
		1561	return;
		1562
		1563	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1564	ev_stop (EV_A_ (W)w);
		1565	}
		1566
		1567	void
		1568	ev_check_start (EV_P_ struct ev_check *w)
		1569	{
		1570	if (expect_false (ev_is_active (w)))
		1571	return;
		1572
		1573	ev_start (EV_A_ (W)w, ++checkcnt);
		1574	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1575	checks [checkcnt - 1] = w;
		1576	}
		1577
		1578	void
		1579	ev_check_stop (EV_P_ struct ev_check *w)
		1580	{
		1581	ev_clear_pending (EV_A_ (W)w);
		1582	if (expect_false (!ev_is_active (w)))
		1583	return;
		1584
		1585	checks [((W)w)->active - 1] = checks [--checkcnt];
		1586	ev_stop (EV_A_ (W)w);
		1587	}
		1588
		1589	#ifndef SA_RESTART
		1590	# define SA_RESTART 0
		1591	#endif
		1592
		1593	void
		1594	ev_signal_start (EV_P_ struct ev_signal *w)
		1595	{
		1596	#if EV_MULTIPLICITY
		1597	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1598	#endif
		1599	if (expect_false (ev_is_active (w)))
		1600	return;
		1601
		1602	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1603
796	ev_start ((W)w, 1);	1604	ev_start (EV_A_ (W)w, 1);
797	array_needsize (signals, signalmax, w->signum, signals_init);	1605	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
798	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1606	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
799		1607
800	if (!w->next)	1608	if (!((WL)w)->next)
801	{	1609	{
		1610	#if _WIN32
		1611	signal (w->signum, sighandler);
		1612	#else
802	struct sigaction sa;	1613	struct sigaction sa;
803	sa.sa_handler = sighandler;	1614	sa.sa_handler = sighandler;
804	sigfillset (&sa.sa_mask);	1615	sigfillset (&sa.sa_mask);
805	sa.sa_flags = 0;	1616	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
806	sigaction (w->signum, &sa, 0);	1617	sigaction (w->signum, &sa, 0);
		1618	#endif
807	}	1619	}
808	}	1620	}
809		1621
810	void	1622	void
811	evsignal_stop (struct ev_signal *w)	1623	ev_signal_stop (EV_P_ struct ev_signal *w)
812	{	1624	{
813	ev_clear ((W)w);	1625	ev_clear_pending (EV_A_ (W)w);
814	if (!ev_is_active (w))	1626	if (expect_false (!ev_is_active (w)))
815	return;	1627	return;
816		1628
817	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1629	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
818	ev_stop ((W)w);	1630	ev_stop (EV_A_ (W)w);
819		1631
820	if (!signals [w->signum - 1].head)	1632	if (!signals [w->signum - 1].head)
821	signal (w->signum, SIG_DFL);	1633	signal (w->signum, SIG_DFL);
822	}	1634	}
823		1635
824	void evidle_start (struct ev_idle *w)	1636	void
		1637	ev_child_start (EV_P_ struct ev_child *w)
825	{	1638	{
		1639	#if EV_MULTIPLICITY
		1640	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1641	#endif
826	if (ev_is_active (w))	1642	if (expect_false (ev_is_active (w)))
827	return;	1643	return;
828		1644
829	ev_start ((W)w, ++idlecnt);	1645	ev_start (EV_A_ (W)w, 1);
830	array_needsize (idles, idlemax, idlecnt, );	1646	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
831	idles [idlecnt - 1] = w;
832	}	1647	}
833		1648
834	void evidle_stop (struct ev_idle *w)	1649	void
		1650	ev_child_stop (EV_P_ struct ev_child *w)
835	{	1651	{
836	ev_clear ((W)w);	1652	ev_clear_pending (EV_A_ (W)w);
837	if (ev_is_active (w))	1653	if (expect_false (!ev_is_active (w)))
838	return;	1654	return;
839		1655
840	idles [w->active - 1] = idles [--idlecnt];	1656	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
841	ev_stop ((W)w);	1657	ev_stop (EV_A_ (W)w);
842	}
843
844	void evprepare_start (struct ev_prepare *w)
845	{
846	if (ev_is_active (w))
847	return;
848
849	ev_start ((W)w, ++preparecnt);
850	array_needsize (prepares, preparemax, preparecnt, );
851	prepares [preparecnt - 1] = w;
852	}
853
854	void evprepare_stop (struct ev_prepare *w)
855	{
856	ev_clear ((W)w);
857	if (ev_is_active (w))
858	return;
859
860	prepares [w->active - 1] = prepares [--preparecnt];
861	ev_stop ((W)w);
862	}
863
864	void evcheck_start (struct ev_check *w)
865	{
866	if (ev_is_active (w))
867	return;
868
869	ev_start ((W)w, ++checkcnt);
870	array_needsize (checks, checkmax, checkcnt, );
871	checks [checkcnt - 1] = w;
872	}
873
874	void evcheck_stop (struct ev_check *w)
875	{
876	ev_clear ((W)w);
877	if (ev_is_active (w))
878	return;
879
880	checks [w->active - 1] = checks [--checkcnt];
881	ev_stop ((W)w);
882	}	1658	}
883		1659
884	/*****************************************************************************/	1660	/*****************************************************************************/
885		1661
886	struct ev_once	1662	struct ev_once
…		…
890	void (cb)(int revents, void arg);	1666	void (cb)(int revents, void arg);
891	void *arg;	1667	void *arg;
892	};	1668	};
893		1669
894	static void	1670	static void
895	once_cb (struct ev_once *once, int revents)	1671	once_cb (EV_P_ struct ev_once *once, int revents)
896	{	1672	{
897	void (cb)(int revents, void arg) = once->cb;	1673	void (cb)(int revents, void arg) = once->cb;
898	void *arg = once->arg;	1674	void *arg = once->arg;
899		1675
900	evio_stop (&once->io);	1676	ev_io_stop (EV_A_ &once->io);
901	evtimer_stop (&once->to);	1677	ev_timer_stop (EV_A_ &once->to);
902	free (once);	1678	ev_free (once);
903		1679
904	cb (revents, arg);	1680	cb (revents, arg);
905	}	1681	}
906		1682
907	static void	1683	static void
908	once_cb_io (struct ev_io *w, int revents)	1684	once_cb_io (EV_P_ struct ev_io *w, int revents)
909	{	1685	{
910	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1686	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
911	}	1687	}
912		1688
913	static void	1689	static void
914	once_cb_to (struct ev_timer *w, int revents)	1690	once_cb_to (EV_P_ struct ev_timer *w, int revents)
915	{	1691	{
916	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1692	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
917	}	1693	}
918		1694
919	void	1695	void
920	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1696	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
921	{	1697	{
922	struct ev_once *once = malloc (sizeof (struct ev_once));	1698	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
923		1699
924	if (!once)	1700	if (expect_false (!once))
925	cb (EV_ERROR, arg);	1701	{
926	else	1702	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1703	return;
927	{	1704	}
		1705
928	once->cb = cb;	1706	once->cb = cb;
929	once->arg = arg;	1707	once->arg = arg;
930		1708
931	evw_init (&once->io, once_cb_io);	1709	ev_init (&once->io, once_cb_io);
932
933	if (fd >= 0)	1710	if (fd >= 0)
934	{	1711	{
935	evio_set (&once->io, fd, events);	1712	ev_io_set (&once->io, fd, events);
936	evio_start (&once->io);	1713	ev_io_start (EV_A_ &once->io);
937	}	1714	}
938		1715
939	evw_init (&once->to, once_cb_to);	1716	ev_init (&once->to, once_cb_to);
940
941	if (timeout >= 0.)	1717	if (timeout >= 0.)
942	{	1718	{
943	evtimer_set (&once->to, timeout, 0.);	1719	ev_timer_set (&once->to, timeout, 0.);
944	evtimer_start (&once->to);	1720	ev_timer_start (EV_A_ &once->to);
945	}
946	}
947	}
948
949	/*****************************************************************************/
950
951	#if 0
952
953	struct ev_io wio;
954
955	static void
956	sin_cb (struct ev_io *w, int revents)
957	{
958	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
959	}
960
961	static void
962	ocb (struct ev_timer *w, int revents)
963	{
964	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
965	evtimer_stop (w);
966	evtimer_start (w);
967	}
968
969	static void
970	scb (struct ev_signal *w, int revents)
971	{
972	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
973	evio_stop (&wio);
974	evio_start (&wio);
975	}
976
977	static void
978	gcb (struct ev_signal *w, int revents)
979	{
980	fprintf (stderr, "generic %x\n", revents);
981
982	}
983
984	int main (void)
985	{
986	ev_init (0);
987
988	evio_init (&wio, sin_cb, 0, EV_READ);
989	evio_start (&wio);
990
991	struct ev_timer t[10000];
992
993	#if 0
994	int i;
995	for (i = 0; i < 10000; ++i)
996	{	1721	}
997	struct ev_timer *w = t + i;
998	evw_init (w, ocb, i);
999	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1000	evtimer_start (w);
1001	if (drand48 () < 0.5)
1002	evtimer_stop (w);
1003	}
1004	#endif
1005
1006	struct ev_timer t1;
1007	evtimer_init (&t1, ocb, 5, 10);
1008	evtimer_start (&t1);
1009
1010	struct ev_signal sig;
1011	evsignal_init (&sig, scb, SIGQUIT);
1012	evsignal_start (&sig);
1013
1014	struct ev_check cw;
1015	evcheck_init (&cw, gcb);
1016	evcheck_start (&cw);
1017
1018	struct ev_idle iw;
1019	evidle_init (&iw, gcb);
1020	evidle_start (&iw);
1021
1022	ev_loop (0);
1023
1024	return 0;
1025	}	1722	}
1026		1723
		1724	#ifdef __cplusplus
		1725	}
1027	#endif	1726	#endif
1028		1727
1029
1030
1031

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Comparing libev/ev.c (file contents): Revision 1.21 by root, Wed Oct 31 18:37:38 2007 UTC vs. Revision 1.132 by root, Fri Nov 23 10:36:30 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.21 by root, Wed Oct 31 18:37:38 2007 UTC vs.
Revision 1.132 by root, Fri Nov 23 10:36:30 2007 UTC