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Comparing libev/ev.c (file contents):
Revision 1.26 by root, Wed Oct 31 21:50:15 2007 UTC vs.
Revision 1.133 by root, Fri Nov 23 11:32:22 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	#endif
		100
30	#include <math.h>	101	#include <math.h>
31	#include <stdlib.h>	102	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	103	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	104	#include <stddef.h>
36		105
37	#include <stdio.h>	106	#include <stdio.h>
38		107
39	#include <assert.h>	108	#include <assert.h>
40	#include <errno.h>	109	#include <errno.h>
41	#include <sys/types.h>	110	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	111	#include <time.h>
45		112
46	#ifndef HAVE_MONOTONIC	113	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	114
48	# define HAVE_MONOTONIC 1	115	#ifndef _WIN32
		116	# include <unistd.h>
		117	# include <sys/time.h>
		118	# include <sys/wait.h>
		119	#else
		120	# define WIN32_LEAN_AND_MEAN
		121	# include <windows.h>
		122	# ifndef EV_SELECT_IS_WINSOCKET
		123	# define EV_SELECT_IS_WINSOCKET 1
49	# endif	124	# endif
50	#endif	125	#endif
51		126
		127	/**/
		128
		129	#ifndef EV_USE_MONOTONIC
		130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
		135	#endif
		136
52	#ifndef HAVE_SELECT	137	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	138	# define EV_USE_SELECT 1
		139	#endif
		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
54	#endif	146	# endif
		147	#endif
55		148
56	#ifndef HAVE_EPOLL	149	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	150	# define EV_USE_EPOLL 0
58	#endif	151	#endif
59		152
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
		157	#ifndef EV_USE_PORT
		158	# define EV_USE_PORT 0
		159	#endif
		160
		161	/**/
		162
		163	#ifndef CLOCK_MONOTONIC
		164	# undef EV_USE_MONOTONIC
		165	# define EV_USE_MONOTONIC 0
		166	#endif
		167
60	#ifndef HAVE_REALTIME	168	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	169	# undef EV_USE_REALTIME
		170	# define EV_USE_REALTIME 0
62	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
63		178
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
67		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
68	#include "ev.h"	187	# include "ev.h"
		188	#endif
		189
		190	#if __GNUC__ >= 3
		191	# define expect(expr,value) __builtin_expect ((expr),(value))
		192	# define inline static inline
		193	#else
		194	# define expect(expr,value) (expr)
		195	# define inline static
		196	#endif
		197
		198	#define expect_false(expr) expect ((expr) != 0, 0)
		199	#define expect_true(expr) expect ((expr) != 0, 1)
		200
		201	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		202	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		203
		204	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		205	#define EMPTY2(a,b) /* used to suppress some warnings */
69		206
70	typedef struct ev_watcher *W;	207	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	208	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	209	typedef struct ev_watcher_time *WT;
73		210
74	static ev_tstamp now, diff; /* monotonic clock */	211	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		212
		213	#ifdef _WIN32
		214	# include "ev_win32.c"
		215	#endif
		216
		217	/*****************************************************************************/
		218
		219	static void (*syserr_cb)(const char *msg);
		220
		221	void ev_set_syserr_cb (void (*cb)(const char *msg))
		222	{
		223	syserr_cb = cb;
		224	}
		225
		226	static void
		227	syserr (const char *msg)
		228	{
		229	if (!msg)
		230	msg = "(libev) system error";
		231
		232	if (syserr_cb)
		233	syserr_cb (msg);
		234	else
		235	{
		236	perror (msg);
		237	abort ();
		238	}
		239	}
		240
		241	static void *(*alloc)(void *ptr, long size);
		242
		243	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		244	{
		245	alloc = cb;
		246	}
		247
		248	static void *
		249	ev_realloc (void *ptr, long size)
		250	{
		251	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		252
		253	if (!ptr && size)
		254	{
		255	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		256	abort ();
		257	}
		258
		259	return ptr;
		260	}
		261
		262	#define ev_malloc(size) ev_realloc (0, (size))
		263	#define ev_free(ptr) ev_realloc ((ptr), 0)
		264
		265	/*****************************************************************************/
		266
		267	typedef struct
		268	{
		269	WL head;
		270	unsigned char events;
		271	unsigned char reify;
		272	#if EV_SELECT_IS_WINSOCKET
		273	SOCKET handle;
		274	#endif
		275	} ANFD;
		276
		277	typedef struct
		278	{
		279	W w;
		280	int events;
		281	} ANPENDING;
		282
		283	#if EV_MULTIPLICITY
		284
		285	struct ev_loop
		286	{
		287	ev_tstamp ev_rt_now;
		288	#define ev_rt_now ((loop)->ev_rt_now)
		289	#define VAR(name,decl) decl;
		290	#include "ev_vars.h"
		291	#undef VAR
		292	};
		293	#include "ev_wrap.h"
		294
		295	static struct ev_loop default_loop_struct;
		296	struct ev_loop *ev_default_loop_ptr;
		297
		298	#else
		299
75	ev_tstamp ev_now;	300	ev_tstamp ev_rt_now;
76	int ev_method;	301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
77		304
78	static int have_monotonic; /* runtime */	305	static int ev_default_loop_ptr;
79		306
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	307	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		308
84	/*****************************************************************************/	309	/*****************************************************************************/
85		310
86	ev_tstamp	311	ev_tstamp
87	ev_time (void)	312	ev_time (void)
88	{	313	{
89	#if HAVE_REALTIME	314	#if EV_USE_REALTIME
90	struct timespec ts;	315	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	316	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	317	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	318	#else
94	struct timeval tv;	319	struct timeval tv;
95	gettimeofday (&tv, 0);	320	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	321	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	322	#endif
98	}	323	}
99		324
100	static ev_tstamp	325	inline ev_tstamp
101	get_clock (void)	326	get_clock (void)
102	{	327	{
103	#if HAVE_MONOTONIC	328	#if EV_USE_MONOTONIC
104	if (have_monotonic)	329	if (expect_true (have_monotonic))
105	{	330	{
106	struct timespec ts;	331	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	332	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	333	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	334	}
110	#endif	335	#endif
111		336
112	return ev_time ();	337	return ev_time ();
113	}	338	}
114		339
		340	#if EV_MULTIPLICITY
		341	ev_tstamp
		342	ev_now (EV_P)
		343	{
		344	return ev_rt_now;
		345	}
		346	#endif
		347
		348	#define array_roundsize(type,n) (((n) | 4) & ~3)
		349
115	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	351	if (expect_false ((cnt) > cur)) \
117	{ \	352	{ \
118	int newcnt = cur; \	353	int newcnt = cur; \
119	do \	354	do \
120	{ \	355	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	356	newcnt = array_roundsize (type, newcnt << 1); \
122	} \	357	} \
123	while ((cnt) > newcnt); \	358	while ((cnt) > newcnt); \
124	\	359	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
126	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	362	cur = newcnt; \
128	}	363	}
		364
		365	#define array_slim(type,stem) \
		366	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		367	{ \
		368	stem ## max = array_roundsize (stem ## cnt >> 1); \
		369	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		370	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		371	}
		372
		373	#define array_free(stem, idx) \
		374	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
129		375
130	/*****************************************************************************/	376	/*****************************************************************************/
131		377
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	378	static void
145	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
146	{	380	{
147	while (count--)	381	while (count--)
148	{	382	{
149	base->head = 0;	383	base->head = 0;
150	base->wev = base->rev = EV_NONE;	384	base->events = EV_NONE;
		385	base->reify = 0;
		386
151	++base;	387	++base;
152	}	388	}
153	}	389	}
154		390
155	typedef struct	391	void
		392	ev_feed_event (EV_P_ void *w, int revents)
156	{	393	{
157	W w;	394	W w_ = (W)w;
158	int events;
159	} ANPENDING;
160		395
161	static ANPENDING *pendings;	396	if (expect_false (w_->pending))
162	static int pendingmax, pendingcnt;
163
164	static void
165	event (W w, int events)
166	{
167	if (w->active)
168	{	397	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		399	return;
173	}	400	}
174	}
175		401
		402	w_->pending = ++pendingcnt [ABSPRI (w_)];
		403	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		404	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		405	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		406	}
		407
176	static void	408	static void
		409	queue_events (EV_P_ W *events, int eventcnt, int type)
		410	{
		411	int i;
		412
		413	for (i = 0; i < eventcnt; ++i)
		414	ev_feed_event (EV_A_ events [i], type);
		415	}
		416
		417	inline void
177	fd_event (int fd, int events)	418	fd_event (EV_P_ int fd, int revents)
178	{	419	{
179	ANFD *anfd = anfds + fd;	420	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	421	struct ev_io *w;
181		422
182	for (w = anfd->head; w; w = w->next)	423	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
183	{	424	{
184	int ev = w->events & events;	425	int ev = w->events & revents;
185		426
186	if (ev)	427	if (ev)
187	event ((W)w, ev);	428	ev_feed_event (EV_A_ (W)w, ev);
188	}	429	}
189	}	430	}
190		431
191	static void	432	void
192	queue_events (W *events, int eventcnt, int type)	433	ev_feed_fd_event (EV_P_ int fd, int revents)
		434	{
		435	fd_event (EV_A_ fd, revents);
		436	}
		437
		438	/*****************************************************************************/
		439
		440	inline void
		441	fd_reify (EV_P)
193	{	442	{
194	int i;	443	int i;
195		444
196	for (i = 0; i < eventcnt; ++i)	445	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	446	{
		447	int fd = fdchanges [i];
		448	ANFD *anfd = anfds + fd;
		449	struct ev_io *w;
		450
		451	int events = 0;
		452
		453	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		454	events |= w->events;
		455
		456	#if EV_SELECT_IS_WINSOCKET
		457	if (events)
		458	{
		459	unsigned long argp;
		460	anfd->handle = _get_osfhandle (fd);
		461	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		462	}
		463	#endif
		464
		465	anfd->reify = 0;
		466
		467	backend_modify (EV_A_ fd, anfd->events, events);
		468	anfd->events = events;
		469	}
		470
		471	fdchangecnt = 0;
		472	}
		473
		474	static void
		475	fd_change (EV_P_ int fd)
		476	{
		477	if (expect_false (anfds [fd].reify))
		478	return;
		479
		480	anfds [fd].reify = 1;
		481
		482	++fdchangecnt;
		483	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		484	fdchanges [fdchangecnt - 1] = fd;
		485	}
		486
		487	static void
		488	fd_kill (EV_P_ int fd)
		489	{
		490	struct ev_io *w;
		491
		492	while ((w = (struct ev_io *)anfds [fd].head))
		493	{
		494	ev_io_stop (EV_A_ w);
		495	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		496	}
		497	}
		498
		499	inline int
		500	fd_valid (int fd)
		501	{
		502	#ifdef _WIN32
		503	return _get_osfhandle (fd) != -1;
		504	#else
		505	return fcntl (fd, F_GETFD) != -1;
		506	#endif
198	}	507	}
199		508
200	/* called on EBADF to verify fds */	509	/* called on EBADF to verify fds */
201	static void	510	static void
202	fd_recheck (void)	511	fd_ebadf (EV_P)
203	{	512	{
204	int fd;	513	int fd;
205		514
206	for (fd = 0; fd < anfdmax; ++fd)	515	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	516	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	517	if (!fd_valid (fd) == -1 && errno == EBADF)
209	while (anfds [fd].head)	518	fd_kill (EV_A_ fd);
		519	}
		520
		521	/* called on ENOMEM in select/poll to kill some fds and retry */
		522	static void
		523	fd_enomem (EV_P)
		524	{
		525	int fd;
		526
		527	for (fd = anfdmax; fd--; )
		528	if (anfds [fd].events)
210	{	529	{
211	event ((W)anfds [fd].head, EV_ERROR);	530	fd_kill (EV_A_ fd);
212	evio_stop (anfds [fd].head);	531	return;
213	}	532	}
		533	}
		534
		535	/* usually called after fork if backend needs to re-arm all fds from scratch */
		536	static void
		537	fd_rearm_all (EV_P)
		538	{
		539	int fd;
		540
		541	/* this should be highly optimised to not do anything but set a flag */
		542	for (fd = 0; fd < anfdmax; ++fd)
		543	if (anfds [fd].events)
		544	{
		545	anfds [fd].events = 0;
		546	fd_change (EV_A_ fd);
		547	}
214	}	548	}
215		549
216	/*****************************************************************************/	550	/*****************************************************************************/
217		551
218	static struct ev_timer **timers;
219	static int timermax, timercnt;
220
221	static struct ev_periodic **periodics;
222	static int periodicmax, periodiccnt;
223
224	static void	552	static void
225	upheap (WT *timers, int k)	553	upheap (WT *heap, int k)
226	{	554	{
227	WT w = timers [k];	555	WT w = heap [k];
228		556
229	while (k && timers [k >> 1]->at > w->at)	557	while (k && heap [k >> 1]->at > w->at)
230	{	558	{
231	timers [k] = timers [k >> 1];	559	heap [k] = heap [k >> 1];
232	timers [k]->active = k + 1;	560	((W)heap [k])->active = k + 1;
233	k >>= 1;	561	k >>= 1;
234	}	562	}
235		563
236	timers [k] = w;	564	heap [k] = w;
237	timers [k]->active = k + 1;	565	((W)heap [k])->active = k + 1;
238		566
239	}	567	}
240		568
241	static void	569	static void
242	downheap (WT *timers, int N, int k)	570	downheap (WT *heap, int N, int k)
243	{	571	{
244	WT w = timers [k];	572	WT w = heap [k];
245		573
246	while (k < (N >> 1))	574	while (k < (N >> 1))
247	{	575	{
248	int j = k << 1;	576	int j = k << 1;
249		577
250	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	578	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
251	++j;	579	++j;
252		580
253	if (w->at <= timers [j]->at)	581	if (w->at <= heap [j]->at)
254	break;	582	break;
255		583
256	timers [k] = timers [j];	584	heap [k] = heap [j];
257	timers [k]->active = k + 1;	585	((W)heap [k])->active = k + 1;
258	k = j;	586	k = j;
259	}	587	}
260		588
261	timers [k] = w;	589	heap [k] = w;
262	timers [k]->active = k + 1;	590	((W)heap [k])->active = k + 1;
		591	}
		592
		593	inline void
		594	adjustheap (WT *heap, int N, int k)
		595	{
		596	upheap (heap, k);
		597	downheap (heap, N, k);
263	}	598	}
264		599
265	/*****************************************************************************/	600	/*****************************************************************************/
266		601
267	typedef struct	602	typedef struct
268	{	603	{
269	struct ev_signal *head;	604	WL head;
270	sig_atomic_t gotsig;	605	sig_atomic_t volatile gotsig;
271	} ANSIG;	606	} ANSIG;
272		607
273	static ANSIG *signals;	608	static ANSIG *signals;
274	static int signalmax;	609	static int signalmax;
275		610
276	static int sigpipe [2];	611	static int sigpipe [2];
277	static sig_atomic_t gotsig;	612	static sig_atomic_t volatile gotsig;
278	static struct ev_io sigev;	613	static struct ev_io sigev;
279		614
280	static void	615	static void
281	signals_init (ANSIG *base, int count)	616	signals_init (ANSIG *base, int count)
282	{	617	{
283	while (count--)	618	while (count--)
284	{	619	{
285	base->head = 0;	620	base->head = 0;
286	base->gotsig = 0;	621	base->gotsig = 0;
		622
287	++base;	623	++base;
288	}	624	}
289	}	625	}
290		626
291	static void	627	static void
292	sighandler (int signum)	628	sighandler (int signum)
293	{	629	{
		630	#if _WIN32
		631	signal (signum, sighandler);
		632	#endif
		633
294	signals [signum - 1].gotsig = 1;	634	signals [signum - 1].gotsig = 1;
295		635
296	if (!gotsig)	636	if (!gotsig)
297	{	637	{
		638	int old_errno = errno;
298	gotsig = 1;	639	gotsig = 1;
299	write (sigpipe [1], &gotsig, 1);	640	write (sigpipe [1], &signum, 1);
		641	errno = old_errno;
300	}	642	}
301	}	643	}
302		644
		645	void
		646	ev_feed_signal_event (EV_P_ int signum)
		647	{
		648	WL w;
		649
		650	#if EV_MULTIPLICITY
		651	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		652	#endif
		653
		654	--signum;
		655
		656	if (signum < 0 || signum >= signalmax)
		657	return;
		658
		659	signals [signum].gotsig = 0;
		660
		661	for (w = signals [signum].head; w; w = w->next)
		662	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		663	}
		664
303	static void	665	static void
304	sigcb (struct ev_io *iow, int revents)	666	sigcb (EV_P_ struct ev_io *iow, int revents)
305	{	667	{
306	struct ev_signal *w;
307	int sig;	668	int signum;
308		669
		670	read (sigpipe [0], &revents, 1);
309	gotsig = 0;	671	gotsig = 0;
310	read (sigpipe [0], &revents, 1);
311		672
312	for (sig = signalmax; sig--; )	673	for (signum = signalmax; signum--; )
313	if (signals [sig].gotsig)	674	if (signals [signum].gotsig)
314	{	675	ev_feed_signal_event (EV_A_ signum + 1);
315	signals [sig].gotsig = 0;
316
317	for (w = signals [sig].head; w; w = w->next)
318	event ((W)w, EV_SIGNAL);
319	}
320	}	676	}
321		677
322	static void	678	static void
323	siginit (void)	679	fd_intern (int fd)
324	{	680	{
		681	#ifdef _WIN32
		682	int arg = 1;
		683	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		684	#else
325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	685	fcntl (fd, F_SETFD, FD_CLOEXEC);
326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327
328	/* rather than sort out wether we really need nb, set it */
329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	686	fcntl (fd, F_SETFL, O_NONBLOCK);
330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	687	#endif
		688	}
331		689
		690	static void
		691	siginit (EV_P)
		692	{
		693	fd_intern (sigpipe [0]);
		694	fd_intern (sigpipe [1]);
		695
332	evio_set (&sigev, sigpipe [0], EV_READ);	696	ev_io_set (&sigev, sigpipe [0], EV_READ);
333	evio_start (&sigev);	697	ev_io_start (EV_A_ &sigev);
		698	ev_unref (EV_A); /* child watcher should not keep loop alive */
334	}	699	}
335		700
336	/*****************************************************************************/	701	/*****************************************************************************/
337		702
338	static struct ev_idle **idles;
339	static int idlemax, idlecnt;
340
341	static struct ev_prepare **prepares;
342	static int preparemax, preparecnt;
343
344	static struct ev_check **checks;
345	static int checkmax, checkcnt;
346
347	/*****************************************************************************/
348
349	static struct ev_child *childs [PID_HASHSIZE];	703	static struct ev_child *childs [PID_HASHSIZE];
		704
		705	#ifndef _WIN32
		706
350	static struct ev_signal childev;	707	static struct ev_signal childev;
351		708
352	#ifndef WCONTINUED	709	#ifndef WCONTINUED
353	# define WCONTINUED 0	710	# define WCONTINUED 0
354	#endif	711	#endif
355		712
356	static void	713	static void
357	childcb (struct ev_signal *sw, int revents)	714	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
358	{	715	{
359	struct ev_child *w;	716	struct ev_child *w;
		717
		718	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		719	if (w->pid == pid || !w->pid)
		720	{
		721	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		722	w->rpid = pid;
		723	w->rstatus = status;
		724	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		725	}
		726	}
		727
		728	static void
		729	childcb (EV_P_ struct ev_signal *sw, int revents)
		730	{
360	int pid, status;	731	int pid, status;
361		732
362	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	733	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	734	{
364	if (w->pid == pid || w->pid == -1)	735	/* make sure we are called again until all childs have been reaped */
365	{	736	/* we need to do it this way so that the callback gets called before we continue */
366	w->status = status;	737	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
367	event ((W)w, EV_CHILD);	738
368	}	739	child_reap (EV_A_ sw, pid, pid, status);
		740	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		741	}
369	}	742	}
		743
		744	#endif
370		745
371	/*****************************************************************************/	746	/*****************************************************************************/
372		747
		748	#if EV_USE_PORT
		749	# include "ev_port.c"
		750	#endif
		751	#if EV_USE_KQUEUE
		752	# include "ev_kqueue.c"
		753	#endif
373	#if HAVE_EPOLL	754	#if EV_USE_EPOLL
374	# include "ev_epoll.c"	755	# include "ev_epoll.c"
375	#endif	756	#endif
		757	#if EV_USE_POLL
		758	# include "ev_poll.c"
		759	#endif
376	#if HAVE_SELECT	760	#if EV_USE_SELECT
377	# include "ev_select.c"	761	# include "ev_select.c"
378	#endif	762	#endif
379		763
380	int	764	int
381	ev_version_major (void)	765	ev_version_major (void)
…		…
387	ev_version_minor (void)	771	ev_version_minor (void)
388	{	772	{
389	return EV_VERSION_MINOR;	773	return EV_VERSION_MINOR;
390	}	774	}
391		775
392	int ev_init (int flags)	776	/* return true if we are running with elevated privileges and should ignore env variables */
		777	static int
		778	enable_secure (void)
393	{	779	{
394	if (!ev_method)	780	#ifdef _WIN32
		781	return 0;
		782	#else
		783	return getuid () != geteuid ()
		784	|| getgid () != getegid ();
		785	#endif
		786	}
		787
		788	unsigned int
		789	ev_supported_backends (void)
		790	{
		791	unsigned int flags = 0;
		792
		793	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		794	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		795	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		796	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		797	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		798
		799	return flags;
		800	}
		801
		802	unsigned int
		803	ev_recommended_backends (void)
		804	{
		805	unsigned int flags = ev_supported_backends ();
		806
		807	#ifndef __NetBSD__
		808	/* kqueue is borked on everything but netbsd apparently */
		809	/* it usually doesn't work correctly on anything but sockets and pipes */
		810	flags &= ~EVBACKEND_KQUEUE;
		811	#endif
		812	#ifdef __APPLE__
		813	// flags &= ~EVBACKEND_KQUEUE; for documentation
		814	flags &= ~EVBACKEND_POLL;
		815	#endif
		816
		817	return flags;
		818	}
		819
		820	unsigned int
		821	ev_backend (EV_P)
		822	{
		823	return backend;
		824	}
		825
		826	static void
		827	loop_init (EV_P_ unsigned int flags)
		828	{
		829	if (!backend)
395	{	830	{
396	#if HAVE_MONOTONIC	831	#if EV_USE_MONOTONIC
397	{	832	{
398	struct timespec ts;	833	struct timespec ts;
399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	834	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400	have_monotonic = 1;	835	have_monotonic = 1;
401	}	836	}
402	#endif	837	#endif
403		838
404	ev_now = ev_time ();	839	ev_rt_now = ev_time ();
405	now = get_clock ();	840	mn_now = get_clock ();
		841	now_floor = mn_now;
406	diff = ev_now - now;	842	rtmn_diff = ev_rt_now - mn_now;
407		843
		844	if (!(flags & EVFLAG_NOENV)
		845	&& !enable_secure ()
		846	&& getenv ("LIBEV_FLAGS"))
		847	flags = atoi (getenv ("LIBEV_FLAGS"));
		848
		849	if (!(flags & 0x0000ffffUL))
		850	flags |= ev_recommended_backends ();
		851
		852	backend = 0;
		853	#if EV_USE_PORT
		854	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		855	#endif
		856	#if EV_USE_KQUEUE
		857	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		858	#endif
		859	#if EV_USE_EPOLL
		860	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		861	#endif
		862	#if EV_USE_POLL
		863	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		864	#endif
		865	#if EV_USE_SELECT
		866	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		867	#endif
		868
		869	ev_init (&sigev, sigcb);
		870	ev_set_priority (&sigev, EV_MAXPRI);
		871	}
		872	}
		873
		874	static void
		875	loop_destroy (EV_P)
		876	{
		877	int i;
		878
		879	#if EV_USE_PORT
		880	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		881	#endif
		882	#if EV_USE_KQUEUE
		883	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		884	#endif
		885	#if EV_USE_EPOLL
		886	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		887	#endif
		888	#if EV_USE_POLL
		889	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		890	#endif
		891	#if EV_USE_SELECT
		892	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		893	#endif
		894
		895	for (i = NUMPRI; i--; )
		896	array_free (pending, [i]);
		897
		898	/* have to use the microsoft-never-gets-it-right macro */
		899	array_free (fdchange, EMPTY0);
		900	array_free (timer, EMPTY0);
		901	#if EV_PERIODICS
		902	array_free (periodic, EMPTY0);
		903	#endif
		904	array_free (idle, EMPTY0);
		905	array_free (prepare, EMPTY0);
		906	array_free (check, EMPTY0);
		907
		908	backend = 0;
		909	}
		910
		911	static void
		912	loop_fork (EV_P)
		913	{
		914	#if EV_USE_PORT
		915	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		916	#endif
		917	#if EV_USE_KQUEUE
		918	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		919	#endif
		920	#if EV_USE_EPOLL
		921	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		922	#endif
		923
		924	if (ev_is_active (&sigev))
		925	{
		926	/* default loop */
		927
		928	ev_ref (EV_A);
		929	ev_io_stop (EV_A_ &sigev);
		930	close (sigpipe [0]);
		931	close (sigpipe [1]);
		932
		933	while (pipe (sigpipe))
		934	syserr ("(libev) error creating pipe");
		935
		936	siginit (EV_A);
		937	}
		938
		939	postfork = 0;
		940	}
		941
		942	#if EV_MULTIPLICITY
		943	struct ev_loop *
		944	ev_loop_new (unsigned int flags)
		945	{
		946	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		947
		948	memset (loop, 0, sizeof (struct ev_loop));
		949
		950	loop_init (EV_A_ flags);
		951
		952	if (ev_backend (EV_A))
		953	return loop;
		954
		955	return 0;
		956	}
		957
		958	void
		959	ev_loop_destroy (EV_P)
		960	{
		961	loop_destroy (EV_A);
		962	ev_free (loop);
		963	}
		964
		965	void
		966	ev_loop_fork (EV_P)
		967	{
		968	postfork = 1;
		969	}
		970
		971	#endif
		972
		973	#if EV_MULTIPLICITY
		974	struct ev_loop *
		975	ev_default_loop_init (unsigned int flags)
		976	#else
		977	int
		978	ev_default_loop (unsigned int flags)
		979	#endif
		980	{
		981	if (sigpipe [0] == sigpipe [1])
408	if (pipe (sigpipe))	982	if (pipe (sigpipe))
409	return 0;	983	return 0;
410		984
411	ev_method = EVMETHOD_NONE;	985	if (!ev_default_loop_ptr)
412	#if HAVE_EPOLL	986	{
413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	987	#if EV_MULTIPLICITY
		988	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		989	#else
		990	ev_default_loop_ptr = 1;
414	#endif	991	#endif
415	#if HAVE_SELECT
416	if (ev_method == EVMETHOD_NONE) select_init (flags);
417	#endif
418		992
419	if (ev_method)	993	loop_init (EV_A_ flags);
		994
		995	if (ev_backend (EV_A))
420	{	996	{
421	evw_init (&sigev, sigcb);
422	siginit ();	997	siginit (EV_A);
423		998
		999	#ifndef _WIN32
424	evsignal_init (&childev, childcb, SIGCHLD);	1000	ev_signal_init (&childev, childcb, SIGCHLD);
		1001	ev_set_priority (&childev, EV_MAXPRI);
425	evsignal_start (&childev);	1002	ev_signal_start (EV_A_ &childev);
		1003	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1004	#endif
426	}	1005	}
		1006	else
		1007	ev_default_loop_ptr = 0;
427	}	1008	}
428		1009
429	return ev_method;	1010	return ev_default_loop_ptr;
		1011	}
		1012
		1013	void
		1014	ev_default_destroy (void)
		1015	{
		1016	#if EV_MULTIPLICITY
		1017	struct ev_loop *loop = ev_default_loop_ptr;
		1018	#endif
		1019
		1020	#ifndef _WIN32
		1021	ev_ref (EV_A); /* child watcher */
		1022	ev_signal_stop (EV_A_ &childev);
		1023	#endif
		1024
		1025	ev_ref (EV_A); /* signal watcher */
		1026	ev_io_stop (EV_A_ &sigev);
		1027
		1028	close (sigpipe [0]); sigpipe [0] = 0;
		1029	close (sigpipe [1]); sigpipe [1] = 0;
		1030
		1031	loop_destroy (EV_A);
		1032	}
		1033
		1034	void
		1035	ev_default_fork (void)
		1036	{
		1037	#if EV_MULTIPLICITY
		1038	struct ev_loop *loop = ev_default_loop_ptr;
		1039	#endif
		1040
		1041	if (backend)
		1042	postfork = 1;
430	}	1043	}
431		1044
432	/*****************************************************************************/	1045	/*****************************************************************************/
433		1046
434	void
435	ev_prefork (void)
436	{
437	/* nop */
438	}
439
440	void
441	ev_postfork_parent (void)
442	{
443	/* nop */
444	}
445
446	void
447	ev_postfork_child (void)
448	{
449	#if HAVE_EPOLL
450	if (ev_method == EVMETHOD_EPOLL)
451	epoll_postfork_child ();
452	#endif
453
454	evio_stop (&sigev);
455	close (sigpipe [0]);
456	close (sigpipe [1]);
457	pipe (sigpipe);
458	siginit ();
459	}
460
461	/*****************************************************************************/
462
463	static void	1047	static int
464	fd_reify (void)	1048	any_pending (EV_P)
465	{	1049	{
466	int i;	1050	int pri;
467		1051
468	for (i = 0; i < fdchangecnt; ++i)	1052	for (pri = NUMPRI; pri--; )
		1053	if (pendingcnt [pri])
		1054	return 1;
		1055
		1056	return 0;
		1057	}
		1058
		1059	inline void
		1060	call_pending (EV_P)
		1061	{
		1062	int pri;
		1063
		1064	for (pri = NUMPRI; pri--; )
		1065	while (pendingcnt [pri])
469	{	1066	{
470	int fd = fdchanges [i];	1067	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
471	ANFD *anfd = anfds + fd;
472	struct ev_io *w;
473		1068
474	int wev = 0;	1069	if (expect_true (p->w))
475
476	for (w = anfd->head; w; w = w->next)
477	wev |= w->events;
478
479	if (anfd->wev != wev)
480	{	1070	{
481	method_modify (fd, anfd->wev, wev);
482	anfd->wev = wev;
483	}
484	}
485
486	fdchangecnt = 0;
487	}
488
489	static void
490	call_pending (void)
491	{
492	while (pendingcnt)
493	{
494	ANPENDING *p = pendings + --pendingcnt;
495
496	if (p->w)
497	{
498	p->w->pending = 0;	1071	p->w->pending = 0;
499	p->w->cb (p->w, p->events);	1072	EV_CB_INVOKE (p->w, p->events);
500	}	1073	}
501	}	1074	}
502	}	1075	}
503		1076
504	static void	1077	inline void
505	timers_reify (void)	1078	timers_reify (EV_P)
506	{	1079	{
507	while (timercnt && timers [0]->at <= now)	1080	while (timercnt && ((WT)timers [0])->at <= mn_now)
508	{	1081	{
509	struct ev_timer *w = timers [0];	1082	struct ev_timer *w = timers [0];
510		1083
511	event ((W)w, EV_TIMEOUT);	1084	assert (("inactive timer on timer heap detected", ev_is_active (w)));
512		1085
513	/* first reschedule or stop timer */	1086	/* first reschedule or stop timer */
514	if (w->repeat)	1087	if (w->repeat)
515	{	1088	{
		1089	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1090
516	w->at = now + w->repeat;	1091	((WT)w)->at += w->repeat;
517	assert (("timer timeout in the past, negative repeat?", w->at > now));	1092	if (((WT)w)->at < mn_now)
		1093	((WT)w)->at = mn_now;
		1094
518	downheap ((WT *)timers, timercnt, 0);	1095	downheap ((WT *)timers, timercnt, 0);
519	}	1096	}
520	else	1097	else
521	evtimer_stop (w); /* nonrepeating: stop timer */	1098	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522	}
523	}
524		1099
525	static void	1100	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1101	}
		1102	}
		1103
		1104	#if EV_PERIODICS
		1105	inline void
526	periodics_reify (void)	1106	periodics_reify (EV_P)
527	{	1107	{
528	while (periodiccnt && periodics [0]->at <= ev_now)	1108	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
529	{	1109	{
530	struct ev_periodic *w = periodics [0];	1110	struct ev_periodic *w = periodics [0];
531		1111
		1112	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1113
532	/* first reschedule or stop timer */	1114	/* first reschedule or stop timer */
533	if (w->interval)	1115	if (w->reschedule_cb)
534	{	1116	{
		1117	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1118	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1119	downheap ((WT *)periodics, periodiccnt, 0);
		1120	}
		1121	else if (w->interval)
		1122	{
535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1123	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1124	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
537	downheap ((WT *)periodics, periodiccnt, 0);	1125	downheap ((WT *)periodics, periodiccnt, 0);
538	}	1126	}
539	else	1127	else
540	evperiodic_stop (w); /* nonrepeating: stop timer */	1128	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541		1129
542	event ((W)w, EV_TIMEOUT);	1130	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
543	}	1131	}
544	}	1132	}
545		1133
546	static void	1134	static void
547	periodics_reschedule (ev_tstamp diff)	1135	periodics_reschedule (EV_P)
548	{	1136	{
549	int i;	1137	int i;
550		1138
551	/* adjust periodics after time jump */	1139	/* adjust periodics after time jump */
552	for (i = 0; i < periodiccnt; ++i)	1140	for (i = 0; i < periodiccnt; ++i)
553	{	1141	{
554	struct ev_periodic *w = periodics [i];	1142	struct ev_periodic *w = periodics [i];
555		1143
		1144	if (w->reschedule_cb)
		1145	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
556	if (w->interval)	1146	else if (w->interval)
		1147	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1148	}
		1149
		1150	/* now rebuild the heap */
		1151	for (i = periodiccnt >> 1; i--; )
		1152	downheap ((WT *)periodics, periodiccnt, i);
		1153	}
		1154	#endif
		1155
		1156	inline int
		1157	time_update_monotonic (EV_P)
		1158	{
		1159	mn_now = get_clock ();
		1160
		1161	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1162	{
		1163	ev_rt_now = rtmn_diff + mn_now;
		1164	return 0;
		1165	}
		1166	else
		1167	{
		1168	now_floor = mn_now;
		1169	ev_rt_now = ev_time ();
		1170	return 1;
		1171	}
		1172	}
		1173
		1174	inline void
		1175	time_update (EV_P)
		1176	{
		1177	int i;
		1178
		1179	#if EV_USE_MONOTONIC
		1180	if (expect_true (have_monotonic))
		1181	{
		1182	if (time_update_monotonic (EV_A))
557	{	1183	{
558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1184	ev_tstamp odiff = rtmn_diff;
559		1185
560	if (fabs (diff) >= 1e-4)	1186	for (i = 4; --i; ) /* loop a few times, before making important decisions */
561	{	1187	{
562	evperiodic_stop (w);	1188	rtmn_diff = ev_rt_now - mn_now;
563	evperiodic_start (w);
564		1189
565	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1190	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1191	return; /* all is well */
		1192
		1193	ev_rt_now = ev_time ();
		1194	mn_now = get_clock ();
		1195	now_floor = mn_now;
566	}	1196	}
		1197
		1198	# if EV_PERIODICS
		1199	periodics_reschedule (EV_A);
		1200	# endif
		1201	/* no timer adjustment, as the monotonic clock doesn't jump */
		1202	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
567	}	1203	}
568	}	1204	}
569	}	1205	else
570		1206	#endif
571	static void	1207	{
572	time_update (void)
573	{
574	int i;
575
576	ev_now = ev_time ();	1208	ev_rt_now = ev_time ();
577		1209
578	if (have_monotonic)	1210	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
579	{
580	ev_tstamp odiff = diff;
581
582	for (i = 4; --i; ) /* loop a few times, before making important decisions */
583	{	1211	{
584	now = get_clock ();	1212	#if EV_PERIODICS
585	diff = ev_now - now;
586
587	if (fabs (odiff - diff) < MIN_TIMEJUMP)
588	return; /* all is well */
589
590	ev_now = ev_time ();
591	}
592
593	periodics_reschedule (diff - odiff);
594	/* no timer adjustment, as the monotonic clock doesn't jump */
595	}
596	else
597	{
598	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
599	{
600	periodics_reschedule (ev_now - now);	1213	periodics_reschedule (EV_A);
		1214	#endif
601		1215
602	/* adjust timers. this is easy, as the offset is the same for all */	1216	/* adjust timers. this is easy, as the offset is the same for all */
603	for (i = 0; i < timercnt; ++i)	1217	for (i = 0; i < timercnt; ++i)
604	timers [i]->at += diff;	1218	((WT)timers [i])->at += ev_rt_now - mn_now;
605	}	1219	}
606		1220
607	now = ev_now;	1221	mn_now = ev_rt_now;
608	}	1222	}
609	}	1223	}
610		1224
611	int ev_loop_done;	1225	void
		1226	ev_ref (EV_P)
		1227	{
		1228	++activecnt;
		1229	}
612		1230
		1231	void
		1232	ev_unref (EV_P)
		1233	{
		1234	--activecnt;
		1235	}
		1236
		1237	static int loop_done;
		1238
		1239	void
613	void ev_loop (int flags)	1240	ev_loop (EV_P_ int flags)
614	{	1241	{
615	double block;	1242	double block;
616	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1243	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
617		1244
618	do	1245	while (activecnt)
619	{	1246	{
620	/* queue check watchers (and execute them) */	1247	/* queue check watchers (and execute them) */
621	if (preparecnt)	1248	if (expect_false (preparecnt))
622	{	1249	{
623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1250	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624	call_pending ();	1251	call_pending (EV_A);
625	}	1252	}
626		1253
		1254	/* we might have forked, so reify kernel state if necessary */
		1255	if (expect_false (postfork))
		1256	loop_fork (EV_A);
		1257
627	/* update fd-related kernel structures */	1258	/* update fd-related kernel structures */
628	fd_reify ();	1259	fd_reify (EV_A);
629		1260
630	/* calculate blocking time */	1261	/* calculate blocking time */
631		1262
632	/* we only need this for !monotonic clockor timers, but as we basically	1263	/* we only need this for !monotonic clock or timers, but as we basically
633	always have timers, we just calculate it always */	1264	always have timers, we just calculate it always */
		1265	#if EV_USE_MONOTONIC
		1266	if (expect_true (have_monotonic))
		1267	time_update_monotonic (EV_A);
		1268	else
		1269	#endif
		1270	{
634	ev_now = ev_time ();	1271	ev_rt_now = ev_time ();
		1272	mn_now = ev_rt_now;
		1273	}
635		1274
636	if (flags & EVLOOP_NONBLOCK || idlecnt)	1275	if (flags & EVLOOP_NONBLOCK || idlecnt)
637	block = 0.;	1276	block = 0.;
638	else	1277	else
639	{	1278	{
640	block = MAX_BLOCKTIME;	1279	block = MAX_BLOCKTIME;
641		1280
642	if (timercnt)	1281	if (timercnt)
643	{	1282	{
644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1283	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
645	if (block > to) block = to;	1284	if (block > to) block = to;
646	}	1285	}
647		1286
		1287	#if EV_PERIODICS
648	if (periodiccnt)	1288	if (periodiccnt)
649	{	1289	{
650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1290	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
651	if (block > to) block = to;	1291	if (block > to) block = to;
652	}	1292	}
		1293	#endif
653		1294
654	if (block < 0.) block = 0.;	1295	if (expect_false (block < 0.)) block = 0.;
655	}	1296	}
656		1297
657	method_poll (block);	1298	backend_poll (EV_A_ block);
658		1299
659	/* update ev_now, do magic */	1300	/* update ev_rt_now, do magic */
660	time_update ();	1301	time_update (EV_A);
661		1302
662	/* queue pending timers and reschedule them */	1303	/* queue pending timers and reschedule them */
663	timers_reify (); /* relative timers called last */	1304	timers_reify (EV_A); /* relative timers called last */
		1305	#if EV_PERIODICS
664	periodics_reify (); /* absolute timers called first */	1306	periodics_reify (EV_A); /* absolute timers called first */
		1307	#endif
665		1308
666	/* queue idle watchers unless io or timers are pending */	1309	/* queue idle watchers unless io or timers are pending */
667	if (!pendingcnt)	1310	if (idlecnt && !any_pending (EV_A))
668	queue_events ((W *)idles, idlecnt, EV_IDLE);	1311	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
669		1312
670	/* queue check watchers, to be executed first */	1313	/* queue check watchers, to be executed first */
671	if (checkcnt)	1314	if (expect_false (checkcnt))
672	queue_events ((W *)checks, checkcnt, EV_CHECK);	1315	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673		1316
674	call_pending ();	1317	call_pending (EV_A);
675	}
676	while (!ev_loop_done);
677		1318
		1319	if (expect_false (loop_done))
		1320	break;
		1321	}
		1322
678	if (ev_loop_done != 2)	1323	if (loop_done != 2)
679	ev_loop_done = 0;	1324	loop_done = 0;
		1325	}
		1326
		1327	void
		1328	ev_unloop (EV_P_ int how)
		1329	{
		1330	loop_done = how;
680	}	1331	}
681		1332
682	/*****************************************************************************/	1333	/*****************************************************************************/
683		1334
684	static void	1335	inline void
685	wlist_add (WL *head, WL elem)	1336	wlist_add (WL *head, WL elem)
686	{	1337	{
687	elem->next = *head;	1338	elem->next = *head;
688	*head = elem;	1339	*head = elem;
689	}	1340	}
690		1341
691	static void	1342	inline void
692	wlist_del (WL *head, WL elem)	1343	wlist_del (WL *head, WL elem)
693	{	1344	{
694	while (*head)	1345	while (*head)
695	{	1346	{
696	if (*head == elem)	1347	if (*head == elem)
…		…
701		1352
702	head = &(*head)->next;	1353	head = &(*head)->next;
703	}	1354	}
704	}	1355	}
705		1356
706	static void	1357	inline void
707	ev_clear (W w)	1358	ev_clear_pending (EV_P_ W w)
708	{	1359	{
709	if (w->pending)	1360	if (w->pending)
710	{	1361	{
711	pendings [w->pending - 1].w = 0;	1362	pendings [ABSPRI (w)][w->pending - 1].w = 0;
712	w->pending = 0;	1363	w->pending = 0;
713	}	1364	}
714	}	1365	}
715		1366
716	static void	1367	inline void
717	ev_start (W w, int active)	1368	ev_start (EV_P_ W w, int active)
718	{	1369	{
		1370	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1371	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1372
719	w->active = active;	1373	w->active = active;
		1374	ev_ref (EV_A);
720	}	1375	}
721		1376
722	static void	1377	inline void
723	ev_stop (W w)	1378	ev_stop (EV_P_ W w)
724	{	1379	{
		1380	ev_unref (EV_A);
725	w->active = 0;	1381	w->active = 0;
726	}	1382	}
727		1383
728	/*****************************************************************************/	1384	/*****************************************************************************/
729		1385
730	void	1386	void
731	evio_start (struct ev_io *w)	1387	ev_io_start (EV_P_ struct ev_io *w)
732	{	1388	{
		1389	int fd = w->fd;
		1390
733	if (ev_is_active (w))	1391	if (expect_false (ev_is_active (w)))
734	return;	1392	return;
735		1393
736	int fd = w->fd;	1394	assert (("ev_io_start called with negative fd", fd >= 0));
737		1395
738	ev_start ((W)w, 1);	1396	ev_start (EV_A_ (W)w, 1);
739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1397	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
740	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1398	wlist_add ((WL *)&anfds[fd].head, (WL)w);
741		1399
742	++fdchangecnt;	1400	fd_change (EV_A_ fd);
743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
744	fdchanges [fdchangecnt - 1] = fd;
745
746	if (w->fd == 9)
747	printf ("start %p:%x\n", w, w->events);//D
748	}	1401	}
749		1402
750	void	1403	void
751	evio_stop (struct ev_io *w)	1404	ev_io_stop (EV_P_ struct ev_io *w)
752	{	1405	{
753	if (w->fd == 9)	1406	ev_clear_pending (EV_A_ (W)w);
754	printf ("stop %p:%x\n", w, w->events);//D
755	ev_clear ((W)w);
756	if (!ev_is_active (w))	1407	if (expect_false (!ev_is_active (w)))
757	return;	1408	return;
758		1409
		1410	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1411
759	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1412	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
760	ev_stop ((W)w);	1413	ev_stop (EV_A_ (W)w);
761		1414
762	++fdchangecnt;	1415	fd_change (EV_A_ w->fd);
763	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
764	fdchanges [fdchangecnt - 1] = w->fd;
765	}	1416	}
766		1417
767	void	1418	void
768	evtimer_start (struct ev_timer *w)	1419	ev_timer_start (EV_P_ struct ev_timer *w)
769	{	1420	{
770	if (ev_is_active (w))	1421	if (expect_false (ev_is_active (w)))
771	return;	1422	return;
772		1423
773	w->at += now;	1424	((WT)w)->at += mn_now;
774		1425
775	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1426	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
776		1427
777	ev_start ((W)w, ++timercnt);	1428	ev_start (EV_A_ (W)w, ++timercnt);
778	array_needsize (timers, timermax, timercnt, );	1429	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
779	timers [timercnt - 1] = w;	1430	timers [timercnt - 1] = w;
780	upheap ((WT *)timers, timercnt - 1);	1431	upheap ((WT *)timers, timercnt - 1);
781	}
782		1432
		1433	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1434	}
		1435
783	void	1436	void
784	evtimer_stop (struct ev_timer *w)	1437	ev_timer_stop (EV_P_ struct ev_timer *w)
785	{	1438	{
786	ev_clear ((W)w);	1439	ev_clear_pending (EV_A_ (W)w);
787	if (!ev_is_active (w))	1440	if (expect_false (!ev_is_active (w)))
788	return;	1441	return;
789		1442
		1443	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1444
790	if (w->active < timercnt--)	1445	if (expect_true (((W)w)->active < timercnt--))
791	{	1446	{
792	timers [w->active - 1] = timers [timercnt];	1447	timers [((W)w)->active - 1] = timers [timercnt];
793	downheap ((WT *)timers, timercnt, w->active - 1);	1448	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
794	}	1449	}
795		1450
796	w->at = w->repeat;	1451	((WT)w)->at -= mn_now;
797		1452
798	ev_stop ((W)w);	1453	ev_stop (EV_A_ (W)w);
799	}	1454	}
800		1455
801	void	1456	void
802	evtimer_again (struct ev_timer *w)	1457	ev_timer_again (EV_P_ struct ev_timer *w)
803	{	1458	{
804	if (ev_is_active (w))	1459	if (ev_is_active (w))
805	{	1460	{
806	if (w->repeat)	1461	if (w->repeat)
807	{	1462	{
808	w->at = now + w->repeat;	1463	((WT)w)->at = mn_now + w->repeat;
809	downheap ((WT *)timers, timercnt, w->active - 1);	1464	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
810	}	1465	}
811	else	1466	else
812	evtimer_stop (w);	1467	ev_timer_stop (EV_A_ w);
813	}	1468	}
814	else if (w->repeat)	1469	else if (w->repeat)
		1470	{
		1471	w->at = w->repeat;
815	evtimer_start (w);	1472	ev_timer_start (EV_A_ w);
		1473	}
816	}	1474	}
817		1475
		1476	#if EV_PERIODICS
818	void	1477	void
819	evperiodic_start (struct ev_periodic *w)	1478	ev_periodic_start (EV_P_ struct ev_periodic *w)
820	{	1479	{
821	if (ev_is_active (w))	1480	if (expect_false (ev_is_active (w)))
822	return;	1481	return;
823		1482
824	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1483	if (w->reschedule_cb)
825		1484	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1485	else if (w->interval)
		1486	{
		1487	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
826	/* this formula differs from the one in periodic_reify because we do not always round up */	1488	/* this formula differs from the one in periodic_reify because we do not always round up */
827	if (w->interval)
828	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1489	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1490	}
829		1491
830	ev_start ((W)w, ++periodiccnt);	1492	ev_start (EV_A_ (W)w, ++periodiccnt);
831	array_needsize (periodics, periodicmax, periodiccnt, );	1493	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
832	periodics [periodiccnt - 1] = w;	1494	periodics [periodiccnt - 1] = w;
833	upheap ((WT *)periodics, periodiccnt - 1);	1495	upheap ((WT *)periodics, periodiccnt - 1);
834	}
835		1496
		1497	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1498	}
		1499
836	void	1500	void
837	evperiodic_stop (struct ev_periodic *w)	1501	ev_periodic_stop (EV_P_ struct ev_periodic *w)
838	{	1502	{
839	ev_clear ((W)w);	1503	ev_clear_pending (EV_A_ (W)w);
840	if (!ev_is_active (w))	1504	if (expect_false (!ev_is_active (w)))
841	return;	1505	return;
842		1506
		1507	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1508
843	if (w->active < periodiccnt--)	1509	if (expect_true (((W)w)->active < periodiccnt--))
844	{	1510	{
845	periodics [w->active - 1] = periodics [periodiccnt];	1511	periodics [((W)w)->active - 1] = periodics [periodiccnt];
846	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1512	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
847	}	1513	}
848		1514
849	ev_stop ((W)w);	1515	ev_stop (EV_A_ (W)w);
850	}	1516	}
851		1517
852	void	1518	void
853	evsignal_start (struct ev_signal *w)	1519	ev_periodic_again (EV_P_ struct ev_periodic *w)
854	{	1520	{
		1521	/* TODO: use adjustheap and recalculation */
		1522	ev_periodic_stop (EV_A_ w);
		1523	ev_periodic_start (EV_A_ w);
		1524	}
		1525	#endif
		1526
		1527	void
		1528	ev_idle_start (EV_P_ struct ev_idle *w)
		1529	{
855	if (ev_is_active (w))	1530	if (expect_false (ev_is_active (w)))
856	return;	1531	return;
857		1532
		1533	ev_start (EV_A_ (W)w, ++idlecnt);
		1534	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1535	idles [idlecnt - 1] = w;
		1536	}
		1537
		1538	void
		1539	ev_idle_stop (EV_P_ struct ev_idle *w)
		1540	{
		1541	ev_clear_pending (EV_A_ (W)w);
		1542	if (expect_false (!ev_is_active (w)))
		1543	return;
		1544
		1545	idles [((W)w)->active - 1] = idles [--idlecnt];
		1546	ev_stop (EV_A_ (W)w);
		1547	}
		1548
		1549	void
		1550	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1551	{
		1552	if (expect_false (ev_is_active (w)))
		1553	return;
		1554
		1555	ev_start (EV_A_ (W)w, ++preparecnt);
		1556	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1557	prepares [preparecnt - 1] = w;
		1558	}
		1559
		1560	void
		1561	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1562	{
		1563	ev_clear_pending (EV_A_ (W)w);
		1564	if (expect_false (!ev_is_active (w)))
		1565	return;
		1566
		1567	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1568	ev_stop (EV_A_ (W)w);
		1569	}
		1570
		1571	void
		1572	ev_check_start (EV_P_ struct ev_check *w)
		1573	{
		1574	if (expect_false (ev_is_active (w)))
		1575	return;
		1576
		1577	ev_start (EV_A_ (W)w, ++checkcnt);
		1578	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1579	checks [checkcnt - 1] = w;
		1580	}
		1581
		1582	void
		1583	ev_check_stop (EV_P_ struct ev_check *w)
		1584	{
		1585	ev_clear_pending (EV_A_ (W)w);
		1586	if (expect_false (!ev_is_active (w)))
		1587	return;
		1588
		1589	checks [((W)w)->active - 1] = checks [--checkcnt];
		1590	ev_stop (EV_A_ (W)w);
		1591	}
		1592
		1593	#ifndef SA_RESTART
		1594	# define SA_RESTART 0
		1595	#endif
		1596
		1597	void
		1598	ev_signal_start (EV_P_ struct ev_signal *w)
		1599	{
		1600	#if EV_MULTIPLICITY
		1601	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1602	#endif
		1603	if (expect_false (ev_is_active (w)))
		1604	return;
		1605
		1606	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1607
858	ev_start ((W)w, 1);	1608	ev_start (EV_A_ (W)w, 1);
859	array_needsize (signals, signalmax, w->signum, signals_init);	1609	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
860	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1610	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
861		1611
862	if (!w->next)	1612	if (!((WL)w)->next)
863	{	1613	{
		1614	#if _WIN32
		1615	signal (w->signum, sighandler);
		1616	#else
864	struct sigaction sa;	1617	struct sigaction sa;
865	sa.sa_handler = sighandler;	1618	sa.sa_handler = sighandler;
866	sigfillset (&sa.sa_mask);	1619	sigfillset (&sa.sa_mask);
867	sa.sa_flags = 0;	1620	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
868	sigaction (w->signum, &sa, 0);	1621	sigaction (w->signum, &sa, 0);
		1622	#endif
869	}	1623	}
870	}	1624	}
871		1625
872	void	1626	void
873	evsignal_stop (struct ev_signal *w)	1627	ev_signal_stop (EV_P_ struct ev_signal *w)
874	{	1628	{
875	ev_clear ((W)w);	1629	ev_clear_pending (EV_A_ (W)w);
876	if (!ev_is_active (w))	1630	if (expect_false (!ev_is_active (w)))
877	return;	1631	return;
878		1632
879	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1633	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
880	ev_stop ((W)w);	1634	ev_stop (EV_A_ (W)w);
881		1635
882	if (!signals [w->signum - 1].head)	1636	if (!signals [w->signum - 1].head)
883	signal (w->signum, SIG_DFL);	1637	signal (w->signum, SIG_DFL);
884	}	1638	}
885		1639
886	void evidle_start (struct ev_idle *w)	1640	void
		1641	ev_child_start (EV_P_ struct ev_child *w)
887	{	1642	{
		1643	#if EV_MULTIPLICITY
		1644	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1645	#endif
888	if (ev_is_active (w))	1646	if (expect_false (ev_is_active (w)))
889	return;	1647	return;
890		1648
891	ev_start ((W)w, ++idlecnt);	1649	ev_start (EV_A_ (W)w, 1);
892	array_needsize (idles, idlemax, idlecnt, );	1650	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
893	idles [idlecnt - 1] = w;
894	}	1651	}
895		1652
896	void evidle_stop (struct ev_idle *w)	1653	void
		1654	ev_child_stop (EV_P_ struct ev_child *w)
897	{	1655	{
898	ev_clear ((W)w);	1656	ev_clear_pending (EV_A_ (W)w);
899	if (ev_is_active (w))	1657	if (expect_false (!ev_is_active (w)))
900	return;	1658	return;
901		1659
902	idles [w->active - 1] = idles [--idlecnt];
903	ev_stop ((W)w);
904	}
905
906	void evprepare_start (struct ev_prepare *w)
907	{
908	if (ev_is_active (w))
909	return;
910
911	ev_start ((W)w, ++preparecnt);
912	array_needsize (prepares, preparemax, preparecnt, );
913	prepares [preparecnt - 1] = w;
914	}
915
916	void evprepare_stop (struct ev_prepare *w)
917	{
918	ev_clear ((W)w);
919	if (ev_is_active (w))
920	return;
921
922	prepares [w->active - 1] = prepares [--preparecnt];
923	ev_stop ((W)w);
924	}
925
926	void evcheck_start (struct ev_check *w)
927	{
928	if (ev_is_active (w))
929	return;
930
931	ev_start ((W)w, ++checkcnt);
932	array_needsize (checks, checkmax, checkcnt, );
933	checks [checkcnt - 1] = w;
934	}
935
936	void evcheck_stop (struct ev_check *w)
937	{
938	ev_clear ((W)w);
939	if (ev_is_active (w))
940	return;
941
942	checks [w->active - 1] = checks [--checkcnt];
943	ev_stop ((W)w);
944	}
945
946	void evchild_start (struct ev_child *w)
947	{
948	if (ev_is_active (w))
949	return;
950
951	ev_start ((W)w, 1);
952	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
953	}
954
955	void evchild_stop (struct ev_child *w)
956	{
957	ev_clear ((W)w);
958	if (ev_is_active (w))
959	return;
960
961	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1660	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
962	ev_stop ((W)w);	1661	ev_stop (EV_A_ (W)w);
963	}	1662	}
964		1663
965	/*****************************************************************************/	1664	/*****************************************************************************/
966		1665
967	struct ev_once	1666	struct ev_once
…		…
971	void (*cb)(int revents, void *arg);	1670	void (*cb)(int revents, void *arg);
972	void *arg;	1671	void *arg;
973	};	1672	};
974		1673
975	static void	1674	static void
976	once_cb (struct ev_once *once, int revents)	1675	once_cb (EV_P_ struct ev_once *once, int revents)
977	{	1676	{
978	void (*cb)(int revents, void *arg) = once->cb;	1677	void (*cb)(int revents, void *arg) = once->cb;
979	void *arg = once->arg;	1678	void *arg = once->arg;
980		1679
981	evio_stop (&once->io);	1680	ev_io_stop (EV_A_ &once->io);
982	evtimer_stop (&once->to);	1681	ev_timer_stop (EV_A_ &once->to);
983	free (once);	1682	ev_free (once);
984		1683
985	cb (revents, arg);	1684	cb (revents, arg);
986	}	1685	}
987		1686
988	static void	1687	static void
989	once_cb_io (struct ev_io *w, int revents)	1688	once_cb_io (EV_P_ struct ev_io *w, int revents)
990	{	1689	{
991	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1690	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
992	}	1691	}
993		1692
994	static void	1693	static void
995	once_cb_to (struct ev_timer *w, int revents)	1694	once_cb_to (EV_P_ struct ev_timer *w, int revents)
996	{	1695	{
997	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1696	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
998	}	1697	}
999		1698
1000	void	1699	void
1001	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1700	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1002	{	1701	{
1003	struct ev_once *once = malloc (sizeof (struct ev_once));	1702	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1004		1703
1005	if (!once)	1704	if (expect_false (!once))
1006	cb (EV_ERROR, arg);	1705	{
1007	else	1706	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1707	return;
1008	{	1708	}
		1709
1009	once->cb = cb;	1710	once->cb = cb;
1010	once->arg = arg;	1711	once->arg = arg;
1011		1712
1012	evw_init (&once->io, once_cb_io);	1713	ev_init (&once->io, once_cb_io);
1013
1014	if (fd >= 0)	1714	if (fd >= 0)
1015	{	1715	{
1016	evio_set (&once->io, fd, events);	1716	ev_io_set (&once->io, fd, events);
1017	evio_start (&once->io);	1717	ev_io_start (EV_A_ &once->io);
1018	}	1718	}
1019		1719
1020	evw_init (&once->to, once_cb_to);	1720	ev_init (&once->to, once_cb_to);
1021
1022	if (timeout >= 0.)	1721	if (timeout >= 0.)
1023	{	1722	{
1024	evtimer_set (&once->to, timeout, 0.);	1723	ev_timer_set (&once->to, timeout, 0.);
1025	evtimer_start (&once->to);	1724	ev_timer_start (EV_A_ &once->to);
1026	}
1027	}
1028	}
1029
1030	/*****************************************************************************/
1031
1032	#if 0
1033
1034	struct ev_io wio;
1035
1036	static void
1037	sin_cb (struct ev_io *w, int revents)
1038	{
1039	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1040	}
1041
1042	static void
1043	ocb (struct ev_timer *w, int revents)
1044	{
1045	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1046	evtimer_stop (w);
1047	evtimer_start (w);
1048	}
1049
1050	static void
1051	scb (struct ev_signal *w, int revents)
1052	{
1053	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1054	evio_stop (&wio);
1055	evio_start (&wio);
1056	}
1057
1058	static void
1059	gcb (struct ev_signal *w, int revents)
1060	{
1061	fprintf (stderr, "generic %x\n", revents);
1062
1063	}
1064
1065	int main (void)
1066	{
1067	ev_init (0);
1068
1069	evio_init (&wio, sin_cb, 0, EV_READ);
1070	evio_start (&wio);
1071
1072	struct ev_timer t[10000];
1073
1074	#if 0
1075	int i;
1076	for (i = 0; i < 10000; ++i)
1077	{	1725	}
1078	struct ev_timer *w = t + i;
1079	evw_init (w, ocb, i);
1080	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1081	evtimer_start (w);
1082	if (drand48 () < 0.5)
1083	evtimer_stop (w);
1084	}
1085	#endif
1086
1087	struct ev_timer t1;
1088	evtimer_init (&t1, ocb, 5, 10);
1089	evtimer_start (&t1);
1090
1091	struct ev_signal sig;
1092	evsignal_init (&sig, scb, SIGQUIT);
1093	evsignal_start (&sig);
1094
1095	struct ev_check cw;
1096	evcheck_init (&cw, gcb);
1097	evcheck_start (&cw);
1098
1099	struct ev_idle iw;
1100	evidle_init (&iw, gcb);
1101	evidle_start (&iw);
1102
1103	ev_loop (0);
1104
1105	return 0;
1106	}	1726	}
1107		1727
		1728	#ifdef __cplusplus
		1729	}
1108	#endif	1730	#endif
1109		1731
1110
1111
1112

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