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Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.136 by root, Sat Nov 24 07:14:26 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	#endif
		100
30	#include <math.h>	101	#include <math.h>
31	#include <stdlib.h>	102	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	103	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	104	#include <stddef.h>
36		105
37	#include <stdio.h>	106	#include <stdio.h>
38		107
39	#include <assert.h>	108	#include <assert.h>
40	#include <errno.h>	109	#include <errno.h>
41	#include <sys/time.h>	110	#include <sys/types.h>
42	#include <time.h>	111	#include <time.h>
43		112
44	#ifndef HAVE_MONOTONIC	113	#include <signal.h>
45	# ifdef CLOCK_MONOTONIC	114
46	# 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
47	# endif	124	# endif
48	#endif	125	#endif
49		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
50	#ifndef HAVE_SELECT	137	#ifndef EV_USE_SELECT
51	# 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
52	#endif	146	# endif
		147	#endif
53		148
54	#ifndef HAVE_EPOLL	149	#ifndef EV_USE_EPOLL
55	# define HAVE_EPOLL 0	150	# define EV_USE_EPOLL 0
56	#endif	151	#endif
57		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
58	#ifndef HAVE_REALTIME	168	#ifndef CLOCK_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	169	# undef EV_USE_REALTIME
		170	# define EV_USE_REALTIME 0
60	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
61		178
62	#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) */
63	#define MAX_BLOCKTIME 60.	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
64		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
65	#include "ev.h"	187	# include "ev.h"
		188	#endif
66		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 */
		206
67	typedef struct ev_watcher *W;	207	typedef ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	208	typedef ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	209	typedef ev_watcher_time *WT;
70		210
71	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
72	ev_tstamp ev_now;	300	ev_tstamp ev_rt_now;
73	int ev_method;	301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
74		304
75	static int have_monotonic; /* runtime */	305	static int ev_default_loop_ptr;
76		306
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	307	#endif
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		308
81	/*****************************************************************************/	309	/*****************************************************************************/
82		310
83	ev_tstamp	311	ev_tstamp
84	ev_time (void)	312	ev_time (void)
85	{	313	{
86	#if HAVE_REALTIME	314	#if EV_USE_REALTIME
87	struct timespec ts;	315	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	316	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	317	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	318	#else
91	struct timeval tv;	319	struct timeval tv;
92	gettimeofday (&tv, 0);	320	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	321	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	322	#endif
95	}	323	}
96		324
97	static ev_tstamp	325	inline ev_tstamp
98	get_clock (void)	326	get_clock (void)
99	{	327	{
100	#if HAVE_MONOTONIC	328	#if EV_USE_MONOTONIC
101	if (have_monotonic)	329	if (expect_true (have_monotonic))
102	{	330	{
103	struct timespec ts;	331	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	332	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	333	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	334	}
107	#endif	335	#endif
108		336
109	return ev_time ();	337	return ev_time ();
110	}	338	}
111		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
112	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	351	if (expect_false ((cnt) > cur)) \
114	{ \	352	{ \
115	int newcnt = cur ? cur << 1 : 16; \	353	int newcnt = cur; \
		354	do \
		355	{ \
		356	newcnt = array_roundsize (type, newcnt << 1); \
		357	} \
		358	while ((cnt) > newcnt); \
		359	\
116	base = realloc (base, sizeof (*base) * (newcnt)); \	360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
117	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	362	cur = newcnt; \
119	}	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;
120		375
121	/*****************************************************************************/	376	/*****************************************************************************/
122		377
		378	static void
		379	anfds_init (ANFD *base, int count)
		380	{
		381	while (count--)
		382	{
		383	base->head = 0;
		384	base->events = EV_NONE;
		385	base->reify = 0;
		386
		387	++base;
		388	}
		389	}
		390
		391	void
		392	ev_feed_event (EV_P_ void *w, int revents)
		393	{
		394	W w_ = (W)w;
		395
		396	if (expect_false (w_->pending))
		397	{
		398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		399	return;
		400	}
		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
		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
		418	fd_event (EV_P_ int fd, int revents)
		419	{
		420	ANFD *anfd = anfds + fd;
		421	ev_io *w;
		422
		423	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		424	{
		425	int ev = w->events & revents;
		426
		427	if (ev)
		428	ev_feed_event (EV_A_ (W)w, ev);
		429	}
		430	}
		431
		432	void
		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)
		442	{
		443	int i;
		444
		445	for (i = 0; i < fdchangecnt; ++i)
		446	{
		447	int fd = fdchanges [i];
		448	ANFD *anfd = anfds + fd;
		449	ev_io *w;
		450
		451	int events = 0;
		452
		453	for (w = (ev_io *)anfd->head; w; w = (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	ev_io *w;
		491
		492	while ((w = (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
		507	}
		508
		509	/* called on EBADF to verify fds */
		510	static void
		511	fd_ebadf (EV_P)
		512	{
		513	int fd;
		514
		515	for (fd = 0; fd < anfdmax; ++fd)
		516	if (anfds [fd].events)
		517	if (!fd_valid (fd) == -1 && errno == EBADF)
		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)
		529	{
		530	fd_kill (EV_A_ fd);
		531	return;
		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	}
		548	}
		549
		550	/*****************************************************************************/
		551
		552	static void
		553	upheap (WT *heap, int k)
		554	{
		555	WT w = heap [k];
		556
		557	while (k && heap [k >> 1]->at > w->at)
		558	{
		559	heap [k] = heap [k >> 1];
		560	((W)heap [k])->active = k + 1;
		561	k >>= 1;
		562	}
		563
		564	heap [k] = w;
		565	((W)heap [k])->active = k + 1;
		566
		567	}
		568
		569	static void
		570	downheap (WT *heap, int N, int k)
		571	{
		572	WT w = heap [k];
		573
		574	while (k < (N >> 1))
		575	{
		576	int j = k << 1;
		577
		578	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		579	++j;
		580
		581	if (w->at <= heap [j]->at)
		582	break;
		583
		584	heap [k] = heap [j];
		585	((W)heap [k])->active = k + 1;
		586	k = j;
		587	}
		588
		589	heap [k] = w;
		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);
		598	}
		599
		600	/*****************************************************************************/
		601
123	typedef struct	602	typedef struct
124	{	603	{
125	struct ev_io *head;	604	WL 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
136	anfds_init (ANFD *base, int count)
137	{
138	while (count--)
139	{
140	base->head = 0;
141	base->wev = base->rev = EV_NONE;
142	++base;
143	}
144	}
145
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;
164	}
165	}
166
167	static void
168	fd_event (int fd, int events)
169	{
170	ANFD *anfd = anfds + fd;
171	struct ev_io *w;
172
173	for (w = anfd->head; w; w = w->next)
174	{
175	int ev = w->events & events;
176
177	if (ev)
178	event ((W)w, ev);
179	}
180	}
181
182	static void
183	queue_events (W *events, int eventcnt, int type)
184	{
185	int i;
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	}
203
204	/*****************************************************************************/
205
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
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;	605	sig_atomic_t volatile gotsig;
259	} ANSIG;	606	} ANSIG;
260		607
261	static ANSIG *signals;	608	static ANSIG *signals;
262	static int signalmax;	609	static int signalmax;
263		610
264	static int sigpipe [2];	611	static int sigpipe [2];
265	static sig_atomic_t gotsig;	612	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	613	static ev_io sigev;
267		614
268	static void	615	static void
269	signals_init (ANSIG *base, int count)	616	signals_init (ANSIG *base, int count)
270	{	617	{
271	while (count--)	618	while (count--)
272	{	619	{
273	base->head = 0;	620	base->head = 0;
274	base->gotsig = 0;	621	base->gotsig = 0;
		622
275	++base;	623	++base;
276	}	624	}
277	}	625	}
278		626
279	static void	627	static void
280	sighandler (int signum)	628	sighandler (int signum)
281	{	629	{
		630	#if _WIN32
		631	signal (signum, sighandler);
		632	#endif
		633
282	signals [signum - 1].gotsig = 1;	634	signals [signum - 1].gotsig = 1;
283		635
284	if (!gotsig)	636	if (!gotsig)
285	{	637	{
		638	int old_errno = errno;
286	gotsig = 1;	639	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	640	write (sigpipe [1], &signum, 1);
		641	errno = old_errno;
288	}	642	}
289	}	643	}
290		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
291	static void	665	static void
292	sigcb (struct ev_io *iow, int revents)	666	sigcb (EV_P_ ev_io *iow, int revents)
293	{	667	{
294	struct ev_signal *w;
295	int sig;	668	int signum;
296		669
		670	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	671	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		672
300	for (sig = signalmax; sig--; )	673	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	674	if (signals [signum].gotsig)
		675	ev_feed_signal_event (EV_A_ signum + 1);
		676	}
		677
		678	static void
		679	fd_intern (int fd)
		680	{
		681	#ifdef _WIN32
		682	int arg = 1;
		683	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		684	#else
		685	fcntl (fd, F_SETFD, FD_CLOEXEC);
		686	fcntl (fd, F_SETFL, O_NONBLOCK);
		687	#endif
		688	}
		689
		690	static void
		691	siginit (EV_P)
		692	{
		693	fd_intern (sigpipe [0]);
		694	fd_intern (sigpipe [1]);
		695
		696	ev_io_set (&sigev, sigpipe [0], EV_READ);
		697	ev_io_start (EV_A_ &sigev);
		698	ev_unref (EV_A); /* child watcher should not keep loop alive */
		699	}
		700
		701	/*****************************************************************************/
		702
		703	static ev_child *childs [PID_HASHSIZE];
		704
		705	#ifndef _WIN32
		706
		707	static ev_signal childev;
		708
		709	#ifndef WCONTINUED
		710	# define WCONTINUED 0
		711	#endif
		712
		713	static void
		714	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		715	{
		716	ev_child *w;
		717
		718	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		719	if (w->pid == pid || !w->pid)
302	{	720	{
303	signals [sig].gotsig = 0;	721	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
304		722	w->rpid = pid;
305	for (w = signals [sig].head; w; w = w->next)	723	w->rstatus = status;
306	event ((W)w, EV_SIGNAL);	724	ev_feed_event (EV_A_ (W)w, EV_CHILD);
307	}	725	}
308	}	726	}
309		727
310	static void	728	static void
311	siginit (void)	729	childcb (EV_P_ ev_signal *sw, int revents)
312	{	730	{
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	731	int pid, status;
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		732
316	/* rather than sort out wether we really need nb, set it */	733	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	734	{
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	735	/* make sure we are called again until all childs have been reaped */
		736	/* we need to do it this way so that the callback gets called before we continue */
		737	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
319		738
320	evio_set (&sigev, sigpipe [0], EV_READ);	739	child_reap (EV_A_ sw, pid, pid, status);
321	evio_start (&sigev);	740	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		741	}
322	}	742	}
		743
		744	#endif
323		745
324	/*****************************************************************************/	746	/*****************************************************************************/
325		747
326	static struct ev_idle **idles;	748	#if EV_USE_PORT
327	static int idlemax, idlecnt;	749	# include "ev_port.c"
		750	#endif
		751	#if EV_USE_KQUEUE
		752	# include "ev_kqueue.c"
		753	#endif
		754	#if EV_USE_EPOLL
		755	# include "ev_epoll.c"
		756	#endif
		757	#if EV_USE_POLL
		758	# include "ev_poll.c"
		759	#endif
		760	#if EV_USE_SELECT
		761	# include "ev_select.c"
		762	#endif
328		763
329	static struct ev_prepare **prepares;	764	int
330	static int preparemax, preparecnt;	765	ev_version_major (void)
		766	{
		767	return EV_VERSION_MAJOR;
		768	}
331		769
332	static struct ev_check **checks;	770	int
333	static int checkmax, checkcnt;	771	ev_version_minor (void)
		772	{
		773	return EV_VERSION_MINOR;
		774	}
		775
		776	/* return true if we are running with elevated privileges and should ignore env variables */
		777	static int
		778	enable_secure (void)
		779	{
		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_embeddable_backends (void)
		822	{
		823	return EVBACKEND_EPOLL
		824	| EVBACKEND_KQUEUE
		825	| EVBACKEND_PORT;
		826	}
		827
		828	unsigned int
		829	ev_backend (EV_P)
		830	{
		831	return backend;
		832	}
		833
		834	static void
		835	loop_init (EV_P_ unsigned int flags)
		836	{
		837	if (!backend)
		838	{
		839	#if EV_USE_MONOTONIC
		840	{
		841	struct timespec ts;
		842	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		843	have_monotonic = 1;
		844	}
		845	#endif
		846
		847	ev_rt_now = ev_time ();
		848	mn_now = get_clock ();
		849	now_floor = mn_now;
		850	rtmn_diff = ev_rt_now - mn_now;
		851
		852	if (!(flags & EVFLAG_NOENV)
		853	&& !enable_secure ()
		854	&& getenv ("LIBEV_FLAGS"))
		855	flags = atoi (getenv ("LIBEV_FLAGS"));
		856
		857	if (!(flags & 0x0000ffffUL))
		858	flags |= ev_recommended_backends ();
		859
		860	backend = 0;
		861	#if EV_USE_PORT
		862	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		863	#endif
		864	#if EV_USE_KQUEUE
		865	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		866	#endif
		867	#if EV_USE_EPOLL
		868	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		869	#endif
		870	#if EV_USE_POLL
		871	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		872	#endif
		873	#if EV_USE_SELECT
		874	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		875	#endif
		876
		877	ev_init (&sigev, sigcb);
		878	ev_set_priority (&sigev, EV_MAXPRI);
		879	}
		880	}
		881
		882	static void
		883	loop_destroy (EV_P)
		884	{
		885	int i;
		886
		887	#if EV_USE_PORT
		888	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		889	#endif
		890	#if EV_USE_KQUEUE
		891	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		892	#endif
		893	#if EV_USE_EPOLL
		894	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		895	#endif
		896	#if EV_USE_POLL
		897	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		898	#endif
		899	#if EV_USE_SELECT
		900	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		901	#endif
		902
		903	for (i = NUMPRI; i--; )
		904	array_free (pending, [i]);
		905
		906	/* have to use the microsoft-never-gets-it-right macro */
		907	array_free (fdchange, EMPTY0);
		908	array_free (timer, EMPTY0);
		909	#if EV_PERIODICS
		910	array_free (periodic, EMPTY0);
		911	#endif
		912	array_free (idle, EMPTY0);
		913	array_free (prepare, EMPTY0);
		914	array_free (check, EMPTY0);
		915
		916	backend = 0;
		917	}
		918
		919	static void
		920	loop_fork (EV_P)
		921	{
		922	#if EV_USE_PORT
		923	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		924	#endif
		925	#if EV_USE_KQUEUE
		926	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		927	#endif
		928	#if EV_USE_EPOLL
		929	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		930	#endif
		931
		932	if (ev_is_active (&sigev))
		933	{
		934	/* default loop */
		935
		936	ev_ref (EV_A);
		937	ev_io_stop (EV_A_ &sigev);
		938	close (sigpipe [0]);
		939	close (sigpipe [1]);
		940
		941	while (pipe (sigpipe))
		942	syserr ("(libev) error creating pipe");
		943
		944	siginit (EV_A);
		945	}
		946
		947	postfork = 0;
		948	}
		949
		950	#if EV_MULTIPLICITY
		951	struct ev_loop *
		952	ev_loop_new (unsigned int flags)
		953	{
		954	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		955
		956	memset (loop, 0, sizeof (struct ev_loop));
		957
		958	loop_init (EV_A_ flags);
		959
		960	if (ev_backend (EV_A))
		961	return loop;
		962
		963	return 0;
		964	}
		965
		966	void
		967	ev_loop_destroy (EV_P)
		968	{
		969	loop_destroy (EV_A);
		970	ev_free (loop);
		971	}
		972
		973	void
		974	ev_loop_fork (EV_P)
		975	{
		976	postfork = 1;
		977	}
		978
		979	#endif
		980
		981	#if EV_MULTIPLICITY
		982	struct ev_loop *
		983	ev_default_loop_init (unsigned int flags)
		984	#else
		985	int
		986	ev_default_loop (unsigned int flags)
		987	#endif
		988	{
		989	if (sigpipe [0] == sigpipe [1])
		990	if (pipe (sigpipe))
		991	return 0;
		992
		993	if (!ev_default_loop_ptr)
		994	{
		995	#if EV_MULTIPLICITY
		996	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		997	#else
		998	ev_default_loop_ptr = 1;
		999	#endif
		1000
		1001	loop_init (EV_A_ flags);
		1002
		1003	if (ev_backend (EV_A))
		1004	{
		1005	siginit (EV_A);
		1006
		1007	#ifndef _WIN32
		1008	ev_signal_init (&childev, childcb, SIGCHLD);
		1009	ev_set_priority (&childev, EV_MAXPRI);
		1010	ev_signal_start (EV_A_ &childev);
		1011	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1012	#endif
		1013	}
		1014	else
		1015	ev_default_loop_ptr = 0;
		1016	}
		1017
		1018	return ev_default_loop_ptr;
		1019	}
		1020
		1021	void
		1022	ev_default_destroy (void)
		1023	{
		1024	#if EV_MULTIPLICITY
		1025	struct ev_loop *loop = ev_default_loop_ptr;
		1026	#endif
		1027
		1028	#ifndef _WIN32
		1029	ev_ref (EV_A); /* child watcher */
		1030	ev_signal_stop (EV_A_ &childev);
		1031	#endif
		1032
		1033	ev_ref (EV_A); /* signal watcher */
		1034	ev_io_stop (EV_A_ &sigev);
		1035
		1036	close (sigpipe [0]); sigpipe [0] = 0;
		1037	close (sigpipe [1]); sigpipe [1] = 0;
		1038
		1039	loop_destroy (EV_A);
		1040	}
		1041
		1042	void
		1043	ev_default_fork (void)
		1044	{
		1045	#if EV_MULTIPLICITY
		1046	struct ev_loop *loop = ev_default_loop_ptr;
		1047	#endif
		1048
		1049	if (backend)
		1050	postfork = 1;
		1051	}
334		1052
335	/*****************************************************************************/	1053	/*****************************************************************************/
336		1054
337	#if HAVE_EPOLL	1055	static int
338	# include "ev_epoll.c"	1056	any_pending (EV_P)
339	#endif
340	#if HAVE_SELECT
341	# include "ev_select.c"
342	#endif
343
344	int ev_init (int flags)
345	{	1057	{
346	#if HAVE_MONOTONIC	1058	int pri;
347	{
348	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;
351	}
352	#endif
353		1059
354	ev_now = ev_time ();	1060	for (pri = NUMPRI; pri--; )
355	now = get_clock ();	1061	if (pendingcnt [pri])
356	diff = ev_now - now;	1062	return 1;
357		1063
358	if (pipe (sigpipe))
359	return 0;	1064	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	}	1065	}
377		1066
378	/*****************************************************************************/	1067	inline void
379		1068	call_pending (EV_P)
380	void ev_prefork (void)
381	{	1069	{
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	{
409	int i;	1070	int pri;
410		1071
411	for (i = 0; i < fdchangecnt; ++i)	1072	for (pri = NUMPRI; pri--; )
		1073	while (pendingcnt [pri])
412	{	1074	{
413	int fd = fdchanges [i];	1075	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
414	ANFD *anfd = anfds + fd;
415	struct ev_io *w;
416		1076
417	int wev = 0;	1077	if (expect_true (p->w))
418
419	for (w = anfd->head; w; w = w->next)
420	wev |= w->events;
421
422	if (anfd->wev != wev)
423	{	1078	{
424	method_modify (fd, anfd->wev, wev);
425	anfd->wev = wev;
426	}
427	}
428
429	fdchangecnt = 0;
430	}
431
432	static void
433	call_pending ()
434	{
435	while (pendingcnt)
436	{
437	ANPENDING *p = pendings + --pendingcnt;
438
439	if (p->w)
440	{
441	p->w->pending = 0;	1079	p->w->pending = 0;
442	p->w->cb (p->w, p->events);	1080	EV_CB_INVOKE (p->w, p->events);
443	}	1081	}
444	}	1082	}
445	}	1083	}
446		1084
447	static void	1085	inline void
448	timers_reify ()	1086	timers_reify (EV_P)
449	{	1087	{
450	while (timercnt && timers [0]->at <= now)	1088	while (timercnt && ((WT)timers [0])->at <= mn_now)
451	{	1089	{
452	struct ev_timer *w = timers [0];	1090	ev_timer *w = timers [0];
453		1091
454	event ((W)w, EV_TIMEOUT);	1092	assert (("inactive timer on timer heap detected", ev_is_active (w)));
455		1093
456	/* first reschedule or stop timer */	1094	/* first reschedule or stop timer */
457	if (w->repeat)	1095	if (w->repeat)
458	{	1096	{
		1097	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1098
459	w->at = now + w->repeat;	1099	((WT)w)->at += w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));	1100	if (((WT)w)->at < mn_now)
		1101	((WT)w)->at = mn_now;
		1102
461	downheap ((WT *)timers, timercnt, 0);	1103	downheap ((WT *)timers, timercnt, 0);
462	}	1104	}
463	else	1105	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	1106	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		1107
468	static void	1108	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1109	}
		1110	}
		1111
		1112	#if EV_PERIODICS
		1113	inline void
469	periodics_reify ()	1114	periodics_reify (EV_P)
470	{	1115	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	1116	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
472	{	1117	{
473	struct ev_periodic *w = periodics [0];	1118	ev_periodic *w = periodics [0];
		1119
		1120	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
474		1121
475	/* first reschedule or stop timer */	1122	/* first reschedule or stop timer */
476	if (w->interval)	1123	if (w->reschedule_cb)
477	{	1124	{
		1125	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1126	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1127	downheap ((WT *)periodics, periodiccnt, 0);
		1128	}
		1129	else if (w->interval)
		1130	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1131	((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));	1132	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);	1133	downheap ((WT *)periodics, periodiccnt, 0);
481	}	1134	}
482	else	1135	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	1136	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		1137
485	event ((W)w, EV_TIMEOUT);	1138	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486	}	1139	}
487	}	1140	}
488		1141
489	static void	1142	static void
490	periodics_reschedule (ev_tstamp diff)	1143	periodics_reschedule (EV_P)
491	{	1144	{
492	int i;	1145	int i;
493		1146
494	/* adjust periodics after time jump */	1147	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	1148	for (i = 0; i < periodiccnt; ++i)
496	{	1149	{
497	struct ev_periodic *w = periodics [i];	1150	ev_periodic *w = periodics [i];
498		1151
		1152	if (w->reschedule_cb)
		1153	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
499	if (w->interval)	1154	else if (w->interval)
		1155	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1156	}
		1157
		1158	/* now rebuild the heap */
		1159	for (i = periodiccnt >> 1; i--; )
		1160	downheap ((WT *)periodics, periodiccnt, i);
		1161	}
		1162	#endif
		1163
		1164	inline int
		1165	time_update_monotonic (EV_P)
		1166	{
		1167	mn_now = get_clock ();
		1168
		1169	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1170	{
		1171	ev_rt_now = rtmn_diff + mn_now;
		1172	return 0;
		1173	}
		1174	else
		1175	{
		1176	now_floor = mn_now;
		1177	ev_rt_now = ev_time ();
		1178	return 1;
		1179	}
		1180	}
		1181
		1182	inline void
		1183	time_update (EV_P)
		1184	{
		1185	int i;
		1186
		1187	#if EV_USE_MONOTONIC
		1188	if (expect_true (have_monotonic))
		1189	{
		1190	if (time_update_monotonic (EV_A))
500	{	1191	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1192	ev_tstamp odiff = rtmn_diff;
502		1193
503	if (fabs (diff) >= 1e-4)	1194	for (i = 4; --i; ) /* loop a few times, before making important decisions */
504	{	1195	{
505	evperiodic_stop (w);	1196	rtmn_diff = ev_rt_now - mn_now;
506	evperiodic_start (w);
507		1197
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1198	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1199	return; /* all is well */
		1200
		1201	ev_rt_now = ev_time ();
		1202	mn_now = get_clock ();
		1203	now_floor = mn_now;
509	}	1204	}
		1205
		1206	# if EV_PERIODICS
		1207	periodics_reschedule (EV_A);
		1208	# endif
		1209	/* no timer adjustment, as the monotonic clock doesn't jump */
		1210	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
510	}	1211	}
511	}	1212	}
512	}	1213	else
513		1214	#endif
514	static void	1215	{
515	time_update ()
516	{
517	int i;
518
519	ev_now = ev_time ();	1216	ev_rt_now = ev_time ();
520		1217
521	if (have_monotonic)	1218	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	{	1219	{
527	now = get_clock ();	1220	#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);	1221	periodics_reschedule (EV_A);
		1222	#endif
544		1223
545	/* adjust timers. this is easy, as the offset is the same for all */	1224	/* adjust timers. this is easy, as the offset is the same for all */
546	for (i = 0; i < timercnt; ++i)	1225	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	1226	((WT)timers [i])->at += ev_rt_now - mn_now;
548	}	1227	}
549		1228
550	now = ev_now;	1229	mn_now = ev_rt_now;
551	}	1230	}
552	}	1231	}
553		1232
554	int ev_loop_done;	1233	void
		1234	ev_ref (EV_P)
		1235	{
		1236	++activecnt;
		1237	}
555		1238
		1239	void
		1240	ev_unref (EV_P)
		1241	{
		1242	--activecnt;
		1243	}
		1244
		1245	static int loop_done;
		1246
		1247	void
556	void ev_loop (int flags)	1248	ev_loop (EV_P_ int flags)
557	{	1249	{
558	double block;	1250	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1251	? EVUNLOOP_ONE
		1252	: EVUNLOOP_CANCEL;
560		1253
561	do	1254	while (activecnt)
562	{	1255	{
563	/* queue check watchers (and execute them) */	1256	/* queue check watchers (and execute them) */
564	if (checkcnt)	1257	if (expect_false (preparecnt))
565	{	1258	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1259	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	1260	call_pending (EV_A);
568	}	1261	}
569		1262
		1263	/* we might have forked, so reify kernel state if necessary */
		1264	if (expect_false (postfork))
		1265	loop_fork (EV_A);
		1266
570	/* update fd-related kernel structures */	1267	/* update fd-related kernel structures */
571	fd_reify ();	1268	fd_reify (EV_A);
572		1269
573	/* calculate blocking time */	1270	/* calculate blocking time */
		1271	{
		1272	double block;
574		1273
575	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
576	ev_now = ev_time ();
577
578	if (flags & EVLOOP_NONBLOCK || idlecnt)	1274	if (flags & EVLOOP_NONBLOCK || idlecnt)
579	block = 0.;	1275	block = 0.; /* do not block at all */
580	else	1276	else
581	{	1277	{
		1278	/* update time to cancel out callback processing overhead */
		1279	#if EV_USE_MONOTONIC
		1280	if (expect_true (have_monotonic))
		1281	time_update_monotonic (EV_A);
		1282	else
		1283	#endif
		1284	{
		1285	ev_rt_now = ev_time ();
		1286	mn_now = ev_rt_now;
		1287	}
		1288
582	block = MAX_BLOCKTIME;	1289	block = MAX_BLOCKTIME;
583		1290
584	if (timercnt)	1291	if (timercnt)
585	{	1292	{
586	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1293	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
587	if (block > to) block = to;	1294	if (block > to) block = to;
588	}	1295	}
589		1296
		1297	#if EV_PERIODICS
590	if (periodiccnt)	1298	if (periodiccnt)
591	{	1299	{
592	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1300	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
593	if (block > to) block = to;	1301	if (block > to) block = to;
594	}	1302	}
		1303	#endif
595		1304
596	if (block < 0.) block = 0.;	1305	if (expect_false (block < 0.)) block = 0.;
597	}	1306	}
598		1307
599	method_poll (block);	1308	backend_poll (EV_A_ block);
		1309	}
600		1310
601	/* update ev_now, do magic */	1311	/* update ev_rt_now, do magic */
602	time_update ();	1312	time_update (EV_A);
603		1313
604	/* queue pending timers and reschedule them */	1314	/* queue pending timers and reschedule them */
605	timers_reify (); /* relative timers called last */	1315	timers_reify (EV_A); /* relative timers called last */
		1316	#if EV_PERIODICS
606	periodics_reify (); /* absolute timers called first */	1317	periodics_reify (EV_A); /* absolute timers called first */
		1318	#endif
607		1319
608	/* queue idle watchers unless io or timers are pending */	1320	/* queue idle watchers unless io or timers are pending */
609	if (!pendingcnt)	1321	if (idlecnt && !any_pending (EV_A))
610	queue_events ((W *)idles, idlecnt, EV_IDLE);	1322	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
611		1323
612	/* queue check watchers, to be executed first */	1324	/* queue check watchers, to be executed first */
613	if (checkcnt)	1325	if (expect_false (checkcnt))
614	queue_events ((W *)checks, checkcnt, EV_CHECK);	1326	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
615		1327
616	call_pending ();	1328	call_pending (EV_A);
617	}
618	while (!ev_loop_done);
619		1329
620	if (ev_loop_done != 2)	1330	if (expect_false (loop_done))
		1331	break;
		1332	}
		1333
		1334	if (loop_done == EVUNLOOP_ONE)
		1335	loop_done = EVUNLOOP_CANCEL;
		1336	}
		1337
		1338	void
		1339	ev_unloop (EV_P_ int how)
		1340	{
621	ev_loop_done = 0;	1341	loop_done = how;
622	}	1342	}
623		1343
624	/*****************************************************************************/	1344	/*****************************************************************************/
625		1345
626	static void	1346	inline void
627	wlist_add (WL *head, WL elem)	1347	wlist_add (WL *head, WL elem)
628	{	1348	{
629	elem->next = *head;	1349	elem->next = *head;
630	*head = elem;	1350	*head = elem;
631	}	1351	}
632		1352
633	static void	1353	inline void
634	wlist_del (WL *head, WL elem)	1354	wlist_del (WL *head, WL elem)
635	{	1355	{
636	while (*head)	1356	while (*head)
637	{	1357	{
638	if (*head == elem)	1358	if (*head == elem)
…		…
643		1363
644	head = &(*head)->next;	1364	head = &(*head)->next;
645	}	1365	}
646	}	1366	}
647		1367
648	static void	1368	inline void
649	ev_clear (W w)	1369	ev_clear_pending (EV_P_ W w)
650	{	1370	{
651	if (w->pending)	1371	if (w->pending)
652	{	1372	{
653	pendings [w->pending - 1].w = 0;	1373	pendings [ABSPRI (w)][w->pending - 1].w = 0;
654	w->pending = 0;	1374	w->pending = 0;
655	}	1375	}
656	}	1376	}
657		1377
658	static void	1378	inline void
659	ev_start (W w, int active)	1379	ev_start (EV_P_ W w, int active)
660	{	1380	{
		1381	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1382	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1383
661	w->active = active;	1384	w->active = active;
		1385	ev_ref (EV_A);
662	}	1386	}
663		1387
664	static void	1388	inline void
665	ev_stop (W w)	1389	ev_stop (EV_P_ W w)
666	{	1390	{
		1391	ev_unref (EV_A);
667	w->active = 0;	1392	w->active = 0;
668	}	1393	}
669		1394
670	/*****************************************************************************/	1395	/*****************************************************************************/
671		1396
672	void	1397	void
673	evio_start (struct ev_io *w)	1398	ev_io_start (EV_P_ ev_io *w)
674	{	1399	{
675	if (ev_is_active (w))
676	return;
677
678	int fd = w->fd;	1400	int fd = w->fd;
679		1401
		1402	if (expect_false (ev_is_active (w)))
		1403	return;
		1404
		1405	assert (("ev_io_start called with negative fd", fd >= 0));
		1406
680	ev_start ((W)w, 1);	1407	ev_start (EV_A_ (W)w, 1);
681	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1408	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
682	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1409	wlist_add ((WL *)&anfds[fd].head, (WL)w);
683		1410
684	++fdchangecnt;	1411	fd_change (EV_A_ fd);
685	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
686	fdchanges [fdchangecnt - 1] = fd;
687	}	1412	}
688		1413
689	void	1414	void
690	evio_stop (struct ev_io *w)	1415	ev_io_stop (EV_P_ ev_io *w)
691	{	1416	{
692	ev_clear ((W)w);	1417	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1418	if (expect_false (!ev_is_active (w)))
694	return;	1419	return;
		1420
		1421	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
695		1422
696	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1423	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
697	ev_stop ((W)w);	1424	ev_stop (EV_A_ (W)w);
698		1425
699	++fdchangecnt;	1426	fd_change (EV_A_ w->fd);
700	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
701	fdchanges [fdchangecnt - 1] = w->fd;
702	}	1427	}
703		1428
704	void	1429	void
705	evtimer_start (struct ev_timer *w)	1430	ev_timer_start (EV_P_ ev_timer *w)
706	{	1431	{
707	if (ev_is_active (w))	1432	if (expect_false (ev_is_active (w)))
708	return;	1433	return;
709		1434
710	w->at += now;	1435	((WT)w)->at += mn_now;
711		1436
712	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1437	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
713		1438
714	ev_start ((W)w, ++timercnt);	1439	ev_start (EV_A_ (W)w, ++timercnt);
715	array_needsize (timers, timermax, timercnt, );	1440	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
716	timers [timercnt - 1] = w;	1441	timers [timercnt - 1] = w;
717	upheap ((WT *)timers, timercnt - 1);	1442	upheap ((WT *)timers, timercnt - 1);
718	}
719		1443
		1444	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1445	}
		1446
720	void	1447	void
721	evtimer_stop (struct ev_timer *w)	1448	ev_timer_stop (EV_P_ ev_timer *w)
722	{	1449	{
723	ev_clear ((W)w);	1450	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1451	if (expect_false (!ev_is_active (w)))
725	return;	1452	return;
726		1453
		1454	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1455
727	if (w->active < timercnt--)	1456	if (expect_true (((W)w)->active < timercnt--))
728	{	1457	{
729	timers [w->active - 1] = timers [timercnt];	1458	timers [((W)w)->active - 1] = timers [timercnt];
730	downheap ((WT *)timers, timercnt, w->active - 1);	1459	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1460	}
732		1461
733	w->at = w->repeat;	1462	((WT)w)->at -= mn_now;
734		1463
735	ev_stop ((W)w);	1464	ev_stop (EV_A_ (W)w);
736	}	1465	}
737		1466
738	void	1467	void
739	evtimer_again (struct ev_timer *w)	1468	ev_timer_again (EV_P_ ev_timer *w)
740	{	1469	{
741	if (ev_is_active (w))	1470	if (ev_is_active (w))
742	{	1471	{
743	if (w->repeat)	1472	if (w->repeat)
744	{	1473	{
745	w->at = now + w->repeat;	1474	((WT)w)->at = mn_now + w->repeat;
746	downheap ((WT *)timers, timercnt, w->active - 1);	1475	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
747	}	1476	}
748	else	1477	else
749	evtimer_stop (w);	1478	ev_timer_stop (EV_A_ w);
750	}	1479	}
751	else if (w->repeat)	1480	else if (w->repeat)
		1481	{
		1482	w->at = w->repeat;
752	evtimer_start (w);	1483	ev_timer_start (EV_A_ w);
		1484	}
753	}	1485	}
754		1486
		1487	#if EV_PERIODICS
755	void	1488	void
756	evperiodic_start (struct ev_periodic *w)	1489	ev_periodic_start (EV_P_ ev_periodic *w)
757	{	1490	{
758	if (ev_is_active (w))	1491	if (expect_false (ev_is_active (w)))
759	return;	1492	return;
760		1493
761	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1494	if (w->reschedule_cb)
762		1495	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1496	else if (w->interval)
		1497	{
		1498	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
763	/* this formula differs from the one in periodic_reify because we do not always round up */	1499	/* this formula differs from the one in periodic_reify because we do not always round up */
764	if (w->interval)
765	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1500	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1501	}
766		1502
767	ev_start ((W)w, ++periodiccnt);	1503	ev_start (EV_A_ (W)w, ++periodiccnt);
768	array_needsize (periodics, periodicmax, periodiccnt, );	1504	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
769	periodics [periodiccnt - 1] = w;	1505	periodics [periodiccnt - 1] = w;
770	upheap ((WT *)periodics, periodiccnt - 1);	1506	upheap ((WT *)periodics, periodiccnt - 1);
771	}
772		1507
		1508	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1509	}
		1510
773	void	1511	void
774	evperiodic_stop (struct ev_periodic *w)	1512	ev_periodic_stop (EV_P_ ev_periodic *w)
775	{	1513	{
776	ev_clear ((W)w);	1514	ev_clear_pending (EV_A_ (W)w);
777	if (!ev_is_active (w))	1515	if (expect_false (!ev_is_active (w)))
778	return;	1516	return;
779		1517
		1518	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1519
780	if (w->active < periodiccnt--)	1520	if (expect_true (((W)w)->active < periodiccnt--))
781	{	1521	{
782	periodics [w->active - 1] = periodics [periodiccnt];	1522	periodics [((W)w)->active - 1] = periodics [periodiccnt];
783	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1523	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
784	}	1524	}
785		1525
786	ev_stop ((W)w);	1526	ev_stop (EV_A_ (W)w);
787	}	1527	}
788		1528
789	void	1529	void
		1530	ev_periodic_again (EV_P_ ev_periodic *w)
		1531	{
		1532	/* TODO: use adjustheap and recalculation */
		1533	ev_periodic_stop (EV_A_ w);
		1534	ev_periodic_start (EV_A_ w);
		1535	}
		1536	#endif
		1537
		1538	void
		1539	ev_idle_start (EV_P_ ev_idle *w)
		1540	{
		1541	if (expect_false (ev_is_active (w)))
		1542	return;
		1543
		1544	ev_start (EV_A_ (W)w, ++idlecnt);
		1545	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1546	idles [idlecnt - 1] = w;
		1547	}
		1548
		1549	void
		1550	ev_idle_stop (EV_P_ ev_idle *w)
		1551	{
		1552	ev_clear_pending (EV_A_ (W)w);
		1553	if (expect_false (!ev_is_active (w)))
		1554	return;
		1555
		1556	idles [((W)w)->active - 1] = idles [--idlecnt];
		1557	ev_stop (EV_A_ (W)w);
		1558	}
		1559
		1560	void
		1561	ev_prepare_start (EV_P_ ev_prepare *w)
		1562	{
		1563	if (expect_false (ev_is_active (w)))
		1564	return;
		1565
		1566	ev_start (EV_A_ (W)w, ++preparecnt);
		1567	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1568	prepares [preparecnt - 1] = w;
		1569	}
		1570
		1571	void
		1572	ev_prepare_stop (EV_P_ ev_prepare *w)
		1573	{
		1574	ev_clear_pending (EV_A_ (W)w);
		1575	if (expect_false (!ev_is_active (w)))
		1576	return;
		1577
		1578	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1579	ev_stop (EV_A_ (W)w);
		1580	}
		1581
		1582	void
		1583	ev_check_start (EV_P_ ev_check *w)
		1584	{
		1585	if (expect_false (ev_is_active (w)))
		1586	return;
		1587
		1588	ev_start (EV_A_ (W)w, ++checkcnt);
		1589	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1590	checks [checkcnt - 1] = w;
		1591	}
		1592
		1593	void
		1594	ev_check_stop (EV_P_ ev_check *w)
		1595	{
		1596	ev_clear_pending (EV_A_ (W)w);
		1597	if (expect_false (!ev_is_active (w)))
		1598	return;
		1599
		1600	checks [((W)w)->active - 1] = checks [--checkcnt];
		1601	ev_stop (EV_A_ (W)w);
		1602	}
		1603
		1604	#ifndef SA_RESTART
		1605	# define SA_RESTART 0
		1606	#endif
		1607
		1608	void
790	evsignal_start (struct ev_signal *w)	1609	ev_signal_start (EV_P_ ev_signal *w)
791	{	1610	{
		1611	#if EV_MULTIPLICITY
		1612	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1613	#endif
792	if (ev_is_active (w))	1614	if (expect_false (ev_is_active (w)))
793	return;	1615	return;
794		1616
		1617	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1618
795	ev_start ((W)w, 1);	1619	ev_start (EV_A_ (W)w, 1);
796	array_needsize (signals, signalmax, w->signum, signals_init);	1620	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
797	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1621	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
798		1622
799	if (!w->next)	1623	if (!((WL)w)->next)
800	{	1624	{
		1625	#if _WIN32
		1626	signal (w->signum, sighandler);
		1627	#else
801	struct sigaction sa;	1628	struct sigaction sa;
802	sa.sa_handler = sighandler;	1629	sa.sa_handler = sighandler;
803	sigfillset (&sa.sa_mask);	1630	sigfillset (&sa.sa_mask);
804	sa.sa_flags = 0;	1631	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
805	sigaction (w->signum, &sa, 0);	1632	sigaction (w->signum, &sa, 0);
		1633	#endif
806	}	1634	}
807	}	1635	}
808		1636
809	void	1637	void
810	evsignal_stop (struct ev_signal *w)	1638	ev_signal_stop (EV_P_ ev_signal *w)
811	{	1639	{
812	ev_clear ((W)w);	1640	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1641	if (expect_false (!ev_is_active (w)))
814	return;	1642	return;
815		1643
816	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1644	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
817	ev_stop ((W)w);	1645	ev_stop (EV_A_ (W)w);
818		1646
819	if (!signals [w->signum - 1].head)	1647	if (!signals [w->signum - 1].head)
820	signal (w->signum, SIG_DFL);	1648	signal (w->signum, SIG_DFL);
821	}	1649	}
822		1650
823	void evidle_start (struct ev_idle *w)	1651	void
		1652	ev_child_start (EV_P_ ev_child *w)
824	{	1653	{
		1654	#if EV_MULTIPLICITY
		1655	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1656	#endif
825	if (ev_is_active (w))	1657	if (expect_false (ev_is_active (w)))
826	return;	1658	return;
827		1659
828	ev_start ((W)w, ++idlecnt);	1660	ev_start (EV_A_ (W)w, 1);
829	array_needsize (idles, idlemax, idlecnt, );	1661	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
830	idles [idlecnt - 1] = w;
831	}	1662	}
832		1663
833	void evidle_stop (struct ev_idle *w)	1664	void
		1665	ev_child_stop (EV_P_ ev_child *w)
834	{	1666	{
835	ev_clear ((W)w);	1667	ev_clear_pending (EV_A_ (W)w);
836	if (ev_is_active (w))	1668	if (expect_false (!ev_is_active (w)))
837	return;	1669	return;
838		1670
839	idles [w->active - 1] = idles [--idlecnt];	1671	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
840	ev_stop ((W)w);	1672	ev_stop (EV_A_ (W)w);
841	}	1673	}
842		1674
843	void evprepare_start (struct ev_prepare *w)	1675	#if EV_MULTIPLICITY
		1676	void
		1677	ev_embed_loop (EV_P_ ev_embed *w)
844	{	1678	{
		1679	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1680	}
		1681
		1682	static void
		1683	embed_cb (EV_P_ ev_io *io, int revents)
		1684	{
		1685	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		1686
845	if (ev_is_active (w))	1687	if (ev_cb (w))
846	return;	1688	ev_feed_event (EV_A_ (W)w, EV_EMBED);
847		1689	else
848	ev_start ((W)w, ++preparecnt);	1690	ev_embed_loop (loop, w);
849	array_needsize (prepares, preparemax, preparecnt, );
850	prepares [preparecnt - 1] = w;
851	}	1691	}
852		1692
853	void evprepare_stop (struct ev_prepare *w)	1693	void
		1694	ev_embed_start (EV_P_ ev_embed *w)
854	{	1695	{
855	ev_clear ((W)w);
856	if (ev_is_active (w))	1696	if (expect_false (ev_is_active (w)))
857	return;	1697	return;
858		1698
859	prepares [w->active - 1] = prepares [--preparecnt];	1699	{
		1700	struct ev_loop *loop = w->loop;
		1701	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1702	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1703	}
		1704
		1705	ev_set_priority (&w->io, ev_priority (w));
		1706	ev_io_start (EV_A_ &w->io);
		1707	ev_start (EV_A_ (W)w, 1);
		1708	}
		1709
		1710	void
		1711	ev_embed_stop (EV_P_ ev_embed *w)
		1712	{
		1713	ev_clear_pending (EV_A_ (W)w);
		1714	if (expect_false (!ev_is_active (w)))
		1715	return;
		1716
		1717	ev_io_stop (EV_A_ &w->io);
860	ev_stop ((W)w);	1718	ev_stop (EV_A_ (W)w);
861	}	1719	}
862		1720	#endif
863	void evcheck_start (struct ev_check *w)
864	{
865	if (ev_is_active (w))
866	return;
867
868	ev_start ((W)w, ++checkcnt);
869	array_needsize (checks, checkmax, checkcnt, );
870	checks [checkcnt - 1] = w;
871	}
872
873	void evcheck_stop (struct ev_check *w)
874	{
875	ev_clear ((W)w);
876	if (ev_is_active (w))
877	return;
878
879	checks [w->active - 1] = checks [--checkcnt];
880	ev_stop ((W)w);
881	}
882		1721
883	/*****************************************************************************/	1722	/*****************************************************************************/
884		1723
885	struct ev_once	1724	struct ev_once
886	{	1725	{
887	struct ev_io io;	1726	ev_io io;
888	struct ev_timer to;	1727	ev_timer to;
889	void (*cb)(int revents, void *arg);	1728	void (*cb)(int revents, void *arg);
890	void *arg;	1729	void *arg;
891	};	1730	};
892		1731
893	static void	1732	static void
894	once_cb (struct ev_once *once, int revents)	1733	once_cb (EV_P_ struct ev_once *once, int revents)
895	{	1734	{
896	void (*cb)(int revents, void *arg) = once->cb;	1735	void (*cb)(int revents, void *arg) = once->cb;
897	void *arg = once->arg;	1736	void *arg = once->arg;
898		1737
899	evio_stop (&once->io);	1738	ev_io_stop (EV_A_ &once->io);
900	evtimer_stop (&once->to);	1739	ev_timer_stop (EV_A_ &once->to);
901	free (once);	1740	ev_free (once);
902		1741
903	cb (revents, arg);	1742	cb (revents, arg);
904	}	1743	}
905		1744
906	static void	1745	static void
907	once_cb_io (struct ev_io *w, int revents)	1746	once_cb_io (EV_P_ ev_io *w, int revents)
908	{	1747	{
909	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1748	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
910	}	1749	}
911		1750
912	static void	1751	static void
913	once_cb_to (struct ev_timer *w, int revents)	1752	once_cb_to (EV_P_ ev_timer *w, int revents)
914	{	1753	{
915	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1754	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
916	}	1755	}
917		1756
918	void	1757	void
919	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1758	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
920	{	1759	{
921	struct ev_once *once = malloc (sizeof (struct ev_once));	1760	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
922		1761
923	if (!once)	1762	if (expect_false (!once))
924	cb (EV_ERROR, arg);	1763	{
925	else	1764	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1765	return;
926	{	1766	}
		1767
927	once->cb = cb;	1768	once->cb = cb;
928	once->arg = arg;	1769	once->arg = arg;
929		1770
930	evw_init (&once->io, once_cb_io);	1771	ev_init (&once->io, once_cb_io);
931
932	if (fd >= 0)	1772	if (fd >= 0)
933	{	1773	{
934	evio_set (&once->io, fd, events);	1774	ev_io_set (&once->io, fd, events);
935	evio_start (&once->io);	1775	ev_io_start (EV_A_ &once->io);
936	}	1776	}
937		1777
938	evw_init (&once->to, once_cb_to);	1778	ev_init (&once->to, once_cb_to);
939
940	if (timeout >= 0.)	1779	if (timeout >= 0.)
941	{	1780	{
942	evtimer_set (&once->to, timeout, 0.);	1781	ev_timer_set (&once->to, timeout, 0.);
943	evtimer_start (&once->to);	1782	ev_timer_start (EV_A_ &once->to);
944	}
945	}
946	}
947
948	/*****************************************************************************/
949
950	#if 0
951
952	struct ev_io wio;
953
954	static void
955	sin_cb (struct ev_io *w, int revents)
956	{
957	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
958	}
959
960	static void
961	ocb (struct ev_timer *w, int revents)
962	{
963	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
964	evtimer_stop (w);
965	evtimer_start (w);
966	}
967
968	static void
969	scb (struct ev_signal *w, int revents)
970	{
971	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
972	evio_stop (&wio);
973	evio_start (&wio);
974	}
975
976	static void
977	gcb (struct ev_signal *w, int revents)
978	{
979	fprintf (stderr, "generic %x\n", revents);
980
981	}
982
983	int main (void)
984	{
985	ev_init (0);
986
987	evio_init (&wio, sin_cb, 0, EV_READ);
988	evio_start (&wio);
989
990	struct ev_timer t[10000];
991
992	#if 0
993	int i;
994	for (i = 0; i < 10000; ++i)
995	{	1783	}
996	struct ev_timer *w = t + i;
997	evw_init (w, ocb, i);
998	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
999	evtimer_start (w);
1000	if (drand48 () < 0.5)
1001	evtimer_stop (w);
1002	}
1003	#endif
1004
1005	struct ev_timer t1;
1006	evtimer_init (&t1, ocb, 5, 10);
1007	evtimer_start (&t1);
1008
1009	struct ev_signal sig;
1010	evsignal_init (&sig, scb, SIGQUIT);
1011	evsignal_start (&sig);
1012
1013	struct ev_check cw;
1014	evcheck_init (&cw, gcb);
1015	evcheck_start (&cw);
1016
1017	struct ev_idle iw;
1018	evidle_init (&iw, gcb);
1019	evidle_start (&iw);
1020
1021	ev_loop (0);
1022
1023	return 0;
1024	}	1784	}
1025		1785
		1786	#ifdef __cplusplus
		1787	}
1026	#endif	1788	#endif
1027		1789
1028
1029
1030

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