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Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.135 by root, Sat Nov 24 06:23:27 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
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
29	#if EV_USE_CONFIG_H	37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
30	# include "config.h"	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
31	#endif	99	#endif
32		100
33	#include <math.h>	101	#include <math.h>
34	#include <stdlib.h>	102	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	103	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	104	#include <stddef.h>
39		105
40	#include <stdio.h>	106	#include <stdio.h>
41		107
42	#include <assert.h>	108	#include <assert.h>
43	#include <errno.h>	109	#include <errno.h>
44	#include <sys/types.h>	110	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	111	#include <time.h>
48		112
		113	#include <signal.h>
		114
		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
		124	# endif
		125	#endif
		126
		127	/**/
		128
49	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	130	# define EV_USE_MONOTONIC 0
52	# endif	131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
53	#endif	135	#endif
54		136
55	#ifndef EV_USE_SELECT	137	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	138	# define EV_USE_SELECT 1
57	#endif	139	#endif
58		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
		146	# endif
		147	#endif
		148
59	#ifndef EV_USE_EPOLL	149	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	150	# define EV_USE_EPOLL 0
61	#endif	151	#endif
62		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
63	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
		169	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
65	#endif	171	#endif
66	#ifndef EV_USE_REALTIME	172
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
68	#endif	175	#endif
		176
		177	/**/
69		178
70	#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) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
74		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
75	#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 */
76		206
77	typedef struct ev_watcher *W;	207	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	208	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	209	typedef struct ev_watcher_time *WT;
80		210
81	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
82	ev_tstamp ev_now;	300	ev_tstamp ev_rt_now;
83	int ev_method;	301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
84		304
85	static int have_monotonic; /* runtime */	305	static int ev_default_loop_ptr;
86		306
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	307	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		308
91	/*****************************************************************************/	309	/*****************************************************************************/
92		310
93	ev_tstamp	311	ev_tstamp
94	ev_time (void)	312	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	320	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	321	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	322	#endif
105	}	323	}
106		324
107	static ev_tstamp	325	inline ev_tstamp
108	get_clock (void)	326	get_clock (void)
109	{	327	{
110	#if EV_USE_MONOTONIC	328	#if EV_USE_MONOTONIC
111	if (have_monotonic)	329	if (expect_true (have_monotonic))
112	{	330	{
113	struct timespec ts;	331	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	332	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	333	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	334	}
117	#endif	335	#endif
118		336
119	return ev_time ();	337	return ev_time ();
120	}	338	}
121		339
		340	#if EV_MULTIPLICITY
		341	ev_tstamp
		342	ev_now (EV_P)
		343	{
		344	return ev_rt_now;
		345	}
		346	#endif
		347
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	348	#define array_roundsize(type,n) (((n) | 4) & ~3)
123		349
124	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
125	if ((cnt) > cur) \	351	if (expect_false ((cnt) > cur)) \
126	{ \	352	{ \
127	int newcnt = cur; \	353	int newcnt = cur; \
128	do \	354	do \
129	{ \	355	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	356	newcnt = array_roundsize (type, newcnt << 1); \
131	} \	357	} \
132	while ((cnt) > newcnt); \	358	while ((cnt) > newcnt); \
133	\	359	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \	360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
135	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	362	cur = newcnt; \
137	}	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;
138		375
139	/*****************************************************************************/	376	/*****************************************************************************/
140
141	typedef struct
142	{
143	struct ev_io *head;
144	int events;
145	} ANFD;
146
147	static ANFD *anfds;
148	static int anfdmax;
149		377
150	static void	378	static void
151	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
152	{	380	{
153	while (count--)	381	while (count--)
154	{	382	{
155	base->head = 0;	383	base->head = 0;
156	base->events = EV_NONE;	384	base->events = EV_NONE;
		385	base->reify = 0;
		386
157	++base;	387	++base;
158	}	388	}
159	}	389	}
160		390
161	typedef struct	391	void
		392	ev_feed_event (EV_P_ void *w, int revents)
162	{	393	{
163	W w;	394	W w_ = (W)w;
164	int events;
165	} ANPENDING;
166		395
167	static ANPENDING *pendings;	396	if (expect_false (w_->pending))
168	static int pendingmax, pendingcnt;	397	{
		398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		399	return;
		400	}
169		401
170	static void	402	if (expect_false (!w_->cb))
171	event (W w, int events)	403	return;
172	{	404
173	w->pending = ++pendingcnt;	405	w_->pending = ++pendingcnt [ABSPRI (w_)];
174	array_needsize (pendings, pendingmax, pendingcnt, );	406	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
175	pendings [pendingcnt - 1].w = w;	407	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
176	pendings [pendingcnt - 1].events = events;	408	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
177	}	409	}
178		410
179	static void	411	static void
180	queue_events (W *events, int eventcnt, int type)	412	queue_events (EV_P_ W *events, int eventcnt, int type)
181	{	413	{
182	int i;	414	int i;
183		415
184	for (i = 0; i < eventcnt; ++i)	416	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);	417	ev_feed_event (EV_A_ events [i], type);
186	}	418	}
187		419
188	static void	420	inline void
189	fd_event (int fd, int events)	421	fd_event (EV_P_ int fd, int revents)
190	{	422	{
191	ANFD *anfd = anfds + fd;	423	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	424	struct ev_io *w;
193		425
194	for (w = anfd->head; w; w = w->next)	426	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
195	{	427	{
196	int ev = w->events & events;	428	int ev = w->events & revents;
197		429
198	if (ev)	430	if (ev)
199	event ((W)w, ev);	431	ev_feed_event (EV_A_ (W)w, ev);
200	}	432	}
		433	}
		434
		435	void
		436	ev_feed_fd_event (EV_P_ int fd, int revents)
		437	{
		438	fd_event (EV_A_ fd, revents);
201	}	439	}
202		440
203	/*****************************************************************************/	441	/*****************************************************************************/
204		442
205	static int *fdchanges;	443	inline void
206	static int fdchangemax, fdchangecnt;	444	fd_reify (EV_P)
207
208	static void
209	fd_reify (void)
210	{	445	{
211	int i;	446	int i;
212		447
213	for (i = 0; i < fdchangecnt; ++i)	448	for (i = 0; i < fdchangecnt; ++i)
214	{	449	{
…		…
216	ANFD *anfd = anfds + fd;	451	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	452	struct ev_io *w;
218		453
219	int events = 0;	454	int events = 0;
220		455
221	for (w = anfd->head; w; w = w->next)	456	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
222	events |= w->events;	457	events |= w->events;
223		458
224	anfd->events &= ~EV_REIFY;	459	#if EV_SELECT_IS_WINSOCKET
225		460	if (events)
226	if (anfd->events != events)
227	{	461	{
228	method_modify (fd, anfd->events, events);	462	unsigned long argp;
229	anfd->events = events;	463	anfd->handle = _get_osfhandle (fd);
		464	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
230	}	465	}
		466	#endif
		467
		468	anfd->reify = 0;
		469
		470	backend_modify (EV_A_ fd, anfd->events, events);
		471	anfd->events = events;
231	}	472	}
232		473
233	fdchangecnt = 0;	474	fdchangecnt = 0;
234	}	475	}
235		476
236	static void	477	static void
237	fd_change (int fd)	478	fd_change (EV_P_ int fd)
238	{	479	{
239	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	480	if (expect_false (anfds [fd].reify))
240	return;	481	return;
241		482
242	anfds [fd].events |= EV_REIFY;	483	anfds [fd].reify = 1;
243		484
244	++fdchangecnt;	485	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	486	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
246	fdchanges [fdchangecnt - 1] = fd;	487	fdchanges [fdchangecnt - 1] = fd;
247	}	488	}
248		489
		490	static void
		491	fd_kill (EV_P_ int fd)
		492	{
		493	struct ev_io *w;
		494
		495	while ((w = (struct ev_io *)anfds [fd].head))
		496	{
		497	ev_io_stop (EV_A_ w);
		498	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		499	}
		500	}
		501
		502	inline int
		503	fd_valid (int fd)
		504	{
		505	#ifdef _WIN32
		506	return _get_osfhandle (fd) != -1;
		507	#else
		508	return fcntl (fd, F_GETFD) != -1;
		509	#endif
		510	}
		511
249	/* called on EBADF to verify fds */	512	/* called on EBADF to verify fds */
250	static void	513	static void
251	fd_recheck (void)	514	fd_ebadf (EV_P)
252	{	515	{
253	int fd;	516	int fd;
254		517
255	for (fd = 0; fd < anfdmax; ++fd)	518	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	519	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	520	if (!fd_valid (fd) == -1 && errno == EBADF)
258	while (anfds [fd].head)	521	fd_kill (EV_A_ fd);
		522	}
		523
		524	/* called on ENOMEM in select/poll to kill some fds and retry */
		525	static void
		526	fd_enomem (EV_P)
		527	{
		528	int fd;
		529
		530	for (fd = anfdmax; fd--; )
		531	if (anfds [fd].events)
259	{	532	{
260	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	533	fd_kill (EV_A_ fd);
261	ev_io_stop (anfds [fd].head);	534	return;
262	}	535	}
		536	}
		537
		538	/* usually called after fork if backend needs to re-arm all fds from scratch */
		539	static void
		540	fd_rearm_all (EV_P)
		541	{
		542	int fd;
		543
		544	/* this should be highly optimised to not do anything but set a flag */
		545	for (fd = 0; fd < anfdmax; ++fd)
		546	if (anfds [fd].events)
		547	{
		548	anfds [fd].events = 0;
		549	fd_change (EV_A_ fd);
		550	}
263	}	551	}
264		552
265	/*****************************************************************************/	553	/*****************************************************************************/
266		554
267	static struct ev_timer **timers;
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void	555	static void
274	upheap (WT *timers, int k)	556	upheap (WT *heap, int k)
275	{	557	{
276	WT w = timers [k];	558	WT w = heap [k];
277		559
278	while (k && timers [k >> 1]->at > w->at)	560	while (k && heap [k >> 1]->at > w->at)
279	{	561	{
280	timers [k] = timers [k >> 1];	562	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	563	((W)heap [k])->active = k + 1;
282	k >>= 1;	564	k >>= 1;
283	}	565	}
284		566
285	timers [k] = w;	567	heap [k] = w;
286	timers [k]->active = k + 1;	568	((W)heap [k])->active = k + 1;
287		569
288	}	570	}
289		571
290	static void	572	static void
291	downheap (WT *timers, int N, int k)	573	downheap (WT *heap, int N, int k)
292	{	574	{
293	WT w = timers [k];	575	WT w = heap [k];
294		576
295	while (k < (N >> 1))	577	while (k < (N >> 1))
296	{	578	{
297	int j = k << 1;	579	int j = k << 1;
298		580
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	581	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	582	++j;
301		583
302	if (w->at <= timers [j]->at)	584	if (w->at <= heap [j]->at)
303	break;	585	break;
304		586
305	timers [k] = timers [j];	587	heap [k] = heap [j];
306	timers [k]->active = k + 1;	588	((W)heap [k])->active = k + 1;
307	k = j;	589	k = j;
308	}	590	}
309		591
310	timers [k] = w;	592	heap [k] = w;
311	timers [k]->active = k + 1;	593	((W)heap [k])->active = k + 1;
		594	}
		595
		596	inline void
		597	adjustheap (WT *heap, int N, int k)
		598	{
		599	upheap (heap, k);
		600	downheap (heap, N, k);
312	}	601	}
313		602
314	/*****************************************************************************/	603	/*****************************************************************************/
315		604
316	typedef struct	605	typedef struct
317	{	606	{
318	struct ev_signal *head;	607	WL head;
319	sig_atomic_t gotsig;	608	sig_atomic_t volatile gotsig;
320	} ANSIG;	609	} ANSIG;
321		610
322	static ANSIG *signals;	611	static ANSIG *signals;
323	static int signalmax;	612	static int signalmax;
324		613
325	static int sigpipe [2];	614	static int sigpipe [2];
326	static sig_atomic_t gotsig;	615	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	616	static struct ev_io sigev;
328		617
329	static void	618	static void
330	signals_init (ANSIG *base, int count)	619	signals_init (ANSIG *base, int count)
331	{	620	{
332	while (count--)	621	while (count--)
333	{	622	{
334	base->head = 0;	623	base->head = 0;
335	base->gotsig = 0;	624	base->gotsig = 0;
		625
336	++base;	626	++base;
337	}	627	}
338	}	628	}
339		629
340	static void	630	static void
341	sighandler (int signum)	631	sighandler (int signum)
342	{	632	{
		633	#if _WIN32
		634	signal (signum, sighandler);
		635	#endif
		636
343	signals [signum - 1].gotsig = 1;	637	signals [signum - 1].gotsig = 1;
344		638
345	if (!gotsig)	639	if (!gotsig)
346	{	640	{
		641	int old_errno = errno;
347	gotsig = 1;	642	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	643	write (sigpipe [1], &signum, 1);
		644	errno = old_errno;
349	}	645	}
350	}	646	}
351		647
		648	void
		649	ev_feed_signal_event (EV_P_ int signum)
		650	{
		651	WL w;
		652
		653	#if EV_MULTIPLICITY
		654	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		655	#endif
		656
		657	--signum;
		658
		659	if (signum < 0 || signum >= signalmax)
		660	return;
		661
		662	signals [signum].gotsig = 0;
		663
		664	for (w = signals [signum].head; w; w = w->next)
		665	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		666	}
		667
352	static void	668	static void
353	sigcb (struct ev_io *iow, int revents)	669	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	670	{
355	struct ev_signal *w;
356	int sig;	671	int signum;
357		672
		673	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	674	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		675
361	for (sig = signalmax; sig--; )	676	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	677	if (signals [signum].gotsig)
363	{	678	ev_feed_signal_event (EV_A_ signum + 1);
364	signals [sig].gotsig = 0;
365
366	for (w = signals [sig].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);
368	}
369	}	679	}
370		680
371	static void	681	static void
372	siginit (void)	682	fd_intern (int fd)
373	{	683	{
		684	#ifdef _WIN32
		685	int arg = 1;
		686	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		687	#else
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	688	fcntl (fd, F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376
377	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	689	fcntl (fd, F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	690	#endif
		691	}
		692
		693	static void
		694	siginit (EV_P)
		695	{
		696	fd_intern (sigpipe [0]);
		697	fd_intern (sigpipe [1]);
380		698
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	699	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	700	ev_io_start (EV_A_ &sigev);
		701	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	702	}
384		703
385	/*****************************************************************************/	704	/*****************************************************************************/
386		705
387	static struct ev_idle **idles;
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397
398	static struct ev_child *childs [PID_HASHSIZE];	706	static struct ev_child *childs [PID_HASHSIZE];
		707
		708	#ifndef _WIN32
		709
399	static struct ev_signal childev;	710	static struct ev_signal childev;
400		711
401	#ifndef WCONTINUED	712	#ifndef WCONTINUED
402	# define WCONTINUED 0	713	# define WCONTINUED 0
403	#endif	714	#endif
404		715
405	static void	716	static void
406	childcb (struct ev_signal *sw, int revents)	717	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	718	{
408	struct ev_child *w;	719	struct ev_child *w;
		720
		721	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		722	if (w->pid == pid || !w->pid)
		723	{
		724	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		725	w->rpid = pid;
		726	w->rstatus = status;
		727	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		728	}
		729	}
		730
		731	static void
		732	childcb (EV_P_ struct ev_signal *sw, int revents)
		733	{
409	int pid, status;	734	int pid, status;
410		735
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	736	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	737	{
413	if (w->pid == pid || w->pid == -1)	738	/* make sure we are called again until all childs have been reaped */
414	{	739	/* we need to do it this way so that the callback gets called before we continue */
415	w->status = status;	740	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
416	event ((W)w, EV_CHILD);	741
417	}	742	child_reap (EV_A_ sw, pid, pid, status);
		743	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		744	}
418	}	745	}
		746
		747	#endif
419		748
420	/*****************************************************************************/	749	/*****************************************************************************/
421		750
		751	#if EV_USE_PORT
		752	# include "ev_port.c"
		753	#endif
		754	#if EV_USE_KQUEUE
		755	# include "ev_kqueue.c"
		756	#endif
422	#if EV_USE_EPOLL	757	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	758	# include "ev_epoll.c"
424	#endif	759	#endif
		760	#if EV_USE_POLL
		761	# include "ev_poll.c"
		762	#endif
425	#if EV_USE_SELECT	763	#if EV_USE_SELECT
426	# include "ev_select.c"	764	# include "ev_select.c"
427	#endif	765	#endif
428		766
429	int	767	int
…		…
436	ev_version_minor (void)	774	ev_version_minor (void)
437	{	775	{
438	return EV_VERSION_MINOR;	776	return EV_VERSION_MINOR;
439	}	777	}
440		778
441	int ev_init (int flags)	779	/* return true if we are running with elevated privileges and should ignore env variables */
		780	static int
		781	enable_secure (void)
442	{	782	{
443	if (!ev_method)	783	#ifdef _WIN32
		784	return 0;
		785	#else
		786	return getuid () != geteuid ()
		787	|| getgid () != getegid ();
		788	#endif
		789	}
		790
		791	unsigned int
		792	ev_supported_backends (void)
		793	{
		794	unsigned int flags = 0;
		795
		796	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		797	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		798	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		799	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		800	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		801
		802	return flags;
		803	}
		804
		805	unsigned int
		806	ev_recommended_backends (void)
		807	{
		808	unsigned int flags = ev_supported_backends ();
		809
		810	#ifndef __NetBSD__
		811	/* kqueue is borked on everything but netbsd apparently */
		812	/* it usually doesn't work correctly on anything but sockets and pipes */
		813	flags &= ~EVBACKEND_KQUEUE;
		814	#endif
		815	#ifdef __APPLE__
		816	// flags &= ~EVBACKEND_KQUEUE; for documentation
		817	flags &= ~EVBACKEND_POLL;
		818	#endif
		819
		820	return flags;
		821	}
		822
		823	unsigned int
		824	ev_embeddable_backends (void)
		825	{
		826	return EVBACKEND_EPOLL
		827	| EVBACKEND_KQUEUE
		828	| EVBACKEND_PORT;
		829	}
		830
		831	unsigned int
		832	ev_backend (EV_P)
		833	{
		834	return backend;
		835	}
		836
		837	static void
		838	loop_init (EV_P_ unsigned int flags)
		839	{
		840	if (!backend)
444	{	841	{
445	#if EV_USE_MONOTONIC	842	#if EV_USE_MONOTONIC
446	{	843	{
447	struct timespec ts;	844	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	845	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	846	have_monotonic = 1;
450	}	847	}
451	#endif	848	#endif
452		849
453	ev_now = ev_time ();	850	ev_rt_now = ev_time ();
454	now = get_clock ();	851	mn_now = get_clock ();
		852	now_floor = mn_now;
455	diff = ev_now - now;	853	rtmn_diff = ev_rt_now - mn_now;
456		854
457	if (pipe (sigpipe))	855	if (!(flags & EVFLAG_NOENV)
458	return 0;	856	&& !enable_secure ()
		857	&& getenv ("LIBEV_FLAGS"))
		858	flags = atoi (getenv ("LIBEV_FLAGS"));
459		859
460	ev_method = EVMETHOD_NONE;	860	if (!(flags & 0x0000ffffUL))
		861	flags |= ev_recommended_backends ();
		862
		863	backend = 0;
		864	#if EV_USE_PORT
		865	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		866	#endif
		867	#if EV_USE_KQUEUE
		868	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		869	#endif
461	#if EV_USE_EPOLL	870	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	871	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		872	#endif
		873	#if EV_USE_POLL
		874	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
463	#endif	875	#endif
464	#if EV_USE_SELECT	876	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	877	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
466	#endif	878	#endif
467		879
468	if (ev_method)	880	ev_init (&sigev, sigcb);
		881	ev_set_priority (&sigev, EV_MAXPRI);
		882	}
		883	}
		884
		885	static void
		886	loop_destroy (EV_P)
		887	{
		888	int i;
		889
		890	#if EV_USE_PORT
		891	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		892	#endif
		893	#if EV_USE_KQUEUE
		894	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		895	#endif
		896	#if EV_USE_EPOLL
		897	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		898	#endif
		899	#if EV_USE_POLL
		900	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		901	#endif
		902	#if EV_USE_SELECT
		903	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		904	#endif
		905
		906	for (i = NUMPRI; i--; )
		907	array_free (pending, [i]);
		908
		909	/* have to use the microsoft-never-gets-it-right macro */
		910	array_free (fdchange, EMPTY0);
		911	array_free (timer, EMPTY0);
		912	#if EV_PERIODICS
		913	array_free (periodic, EMPTY0);
		914	#endif
		915	array_free (idle, EMPTY0);
		916	array_free (prepare, EMPTY0);
		917	array_free (check, EMPTY0);
		918
		919	backend = 0;
		920	}
		921
		922	static void
		923	loop_fork (EV_P)
		924	{
		925	#if EV_USE_PORT
		926	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		927	#endif
		928	#if EV_USE_KQUEUE
		929	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		930	#endif
		931	#if EV_USE_EPOLL
		932	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		933	#endif
		934
		935	if (ev_is_active (&sigev))
		936	{
		937	/* default loop */
		938
		939	ev_ref (EV_A);
		940	ev_io_stop (EV_A_ &sigev);
		941	close (sigpipe [0]);
		942	close (sigpipe [1]);
		943
		944	while (pipe (sigpipe))
		945	syserr ("(libev) error creating pipe");
		946
		947	siginit (EV_A);
		948	}
		949
		950	postfork = 0;
		951	}
		952
		953	#if EV_MULTIPLICITY
		954	struct ev_loop *
		955	ev_loop_new (unsigned int flags)
		956	{
		957	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		958
		959	memset (loop, 0, sizeof (struct ev_loop));
		960
		961	loop_init (EV_A_ flags);
		962
		963	if (ev_backend (EV_A))
		964	return loop;
		965
		966	return 0;
		967	}
		968
		969	void
		970	ev_loop_destroy (EV_P)
		971	{
		972	loop_destroy (EV_A);
		973	ev_free (loop);
		974	}
		975
		976	void
		977	ev_loop_fork (EV_P)
		978	{
		979	postfork = 1;
		980	}
		981
		982	#endif
		983
		984	#if EV_MULTIPLICITY
		985	struct ev_loop *
		986	ev_default_loop_init (unsigned int flags)
		987	#else
		988	int
		989	ev_default_loop (unsigned int flags)
		990	#endif
		991	{
		992	if (sigpipe [0] == sigpipe [1])
		993	if (pipe (sigpipe))
		994	return 0;
		995
		996	if (!ev_default_loop_ptr)
		997	{
		998	#if EV_MULTIPLICITY
		999	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1000	#else
		1001	ev_default_loop_ptr = 1;
		1002	#endif
		1003
		1004	loop_init (EV_A_ flags);
		1005
		1006	if (ev_backend (EV_A))
469	{	1007	{
470	ev_watcher_init (&sigev, sigcb);
471	siginit ();	1008	siginit (EV_A);
472		1009
		1010	#ifndef _WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	1011	ev_signal_init (&childev, childcb, SIGCHLD);
		1012	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	1013	ev_signal_start (EV_A_ &childev);
		1014	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1015	#endif
475	}	1016	}
		1017	else
		1018	ev_default_loop_ptr = 0;
476	}	1019	}
477		1020
478	return ev_method;	1021	return ev_default_loop_ptr;
		1022	}
		1023
		1024	void
		1025	ev_default_destroy (void)
		1026	{
		1027	#if EV_MULTIPLICITY
		1028	struct ev_loop *loop = ev_default_loop_ptr;
		1029	#endif
		1030
		1031	#ifndef _WIN32
		1032	ev_ref (EV_A); /* child watcher */
		1033	ev_signal_stop (EV_A_ &childev);
		1034	#endif
		1035
		1036	ev_ref (EV_A); /* signal watcher */
		1037	ev_io_stop (EV_A_ &sigev);
		1038
		1039	close (sigpipe [0]); sigpipe [0] = 0;
		1040	close (sigpipe [1]); sigpipe [1] = 0;
		1041
		1042	loop_destroy (EV_A);
		1043	}
		1044
		1045	void
		1046	ev_default_fork (void)
		1047	{
		1048	#if EV_MULTIPLICITY
		1049	struct ev_loop *loop = ev_default_loop_ptr;
		1050	#endif
		1051
		1052	if (backend)
		1053	postfork = 1;
479	}	1054	}
480		1055
481	/*****************************************************************************/	1056	/*****************************************************************************/
482		1057
483	void
484	ev_prefork (void)
485	{
486	/* nop */
487	}
488
489	void
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif
502
503	ev_io_stop (&sigev);
504	close (sigpipe [0]);
505	close (sigpipe [1]);
506	pipe (sigpipe);
507	siginit ();
508	}
509
510	/*****************************************************************************/
511
512	static void	1058	static int
		1059	any_pending (EV_P)
		1060	{
		1061	int pri;
		1062
		1063	for (pri = NUMPRI; pri--; )
		1064	if (pendingcnt [pri])
		1065	return 1;
		1066
		1067	return 0;
		1068	}
		1069
		1070	inline void
513	call_pending (void)	1071	call_pending (EV_P)
514	{	1072	{
		1073	int pri;
		1074
		1075	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	1076	while (pendingcnt [pri])
516	{	1077	{
517	ANPENDING *p = pendings + --pendingcnt;	1078	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		1079
519	if (p->w)	1080	if (expect_true (p->w))
520	{	1081	{
521	p->w->pending = 0;	1082	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	1083	EV_CB_INVOKE (p->w, p->events);
523	}	1084	}
524	}	1085	}
525	}	1086	}
526		1087
527	static void	1088	inline void
528	timers_reify (void)	1089	timers_reify (EV_P)
529	{	1090	{
530	while (timercnt && timers [0]->at <= now)	1091	while (timercnt && ((WT)timers [0])->at <= mn_now)
531	{	1092	{
532	struct ev_timer *w = timers [0];	1093	struct ev_timer *w = timers [0];
		1094
		1095	assert (("inactive timer on timer heap detected", ev_is_active (w)));
533		1096
534	/* first reschedule or stop timer */	1097	/* first reschedule or stop timer */
535	if (w->repeat)	1098	if (w->repeat)
536	{	1099	{
		1100	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1101
537	w->at = now + w->repeat;	1102	((WT)w)->at += w->repeat;
538	assert (("timer timeout in the past, negative repeat?", w->at > now));	1103	if (((WT)w)->at < mn_now)
		1104	((WT)w)->at = mn_now;
		1105
539	downheap ((WT *)timers, timercnt, 0);	1106	downheap ((WT *)timers, timercnt, 0);
540	}	1107	}
541	else	1108	else
542	ev_timer_stop (w); /* nonrepeating: stop timer */	1109	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543		1110
544	event ((W)w, EV_TIMEOUT);	1111	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
545	}	1112	}
546	}	1113	}
547		1114
548	static void	1115	#if EV_PERIODICS
		1116	inline void
549	periodics_reify (void)	1117	periodics_reify (EV_P)
550	{	1118	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	1119	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
552	{	1120	{
553	struct ev_periodic *w = periodics [0];	1121	struct ev_periodic *w = periodics [0];
554		1122
		1123	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1124
555	/* first reschedule or stop timer */	1125	/* first reschedule or stop timer */
556	if (w->interval)	1126	if (w->reschedule_cb)
557	{	1127	{
		1128	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1129	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1130	downheap ((WT *)periodics, periodiccnt, 0);
		1131	}
		1132	else if (w->interval)
		1133	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1134	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
559	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1135	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	1136	downheap ((WT *)periodics, periodiccnt, 0);
561	}	1137	}
562	else	1138	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	1139	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		1140
565	event ((W)w, EV_TIMEOUT);	1141	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566	}	1142	}
567	}	1143	}
568		1144
569	static void	1145	static void
570	periodics_reschedule (ev_tstamp diff)	1146	periodics_reschedule (EV_P)
571	{	1147	{
572	int i;	1148	int i;
573		1149
574	/* adjust periodics after time jump */	1150	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	1151	for (i = 0; i < periodiccnt; ++i)
576	{	1152	{
577	struct ev_periodic *w = periodics [i];	1153	struct ev_periodic *w = periodics [i];
578		1154
		1155	if (w->reschedule_cb)
		1156	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
579	if (w->interval)	1157	else if (w->interval)
		1158	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1159	}
		1160
		1161	/* now rebuild the heap */
		1162	for (i = periodiccnt >> 1; i--; )
		1163	downheap ((WT *)periodics, periodiccnt, i);
		1164	}
		1165	#endif
		1166
		1167	inline int
		1168	time_update_monotonic (EV_P)
		1169	{
		1170	mn_now = get_clock ();
		1171
		1172	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1173	{
		1174	ev_rt_now = rtmn_diff + mn_now;
		1175	return 0;
		1176	}
		1177	else
		1178	{
		1179	now_floor = mn_now;
		1180	ev_rt_now = ev_time ();
		1181	return 1;
		1182	}
		1183	}
		1184
		1185	inline void
		1186	time_update (EV_P)
		1187	{
		1188	int i;
		1189
		1190	#if EV_USE_MONOTONIC
		1191	if (expect_true (have_monotonic))
		1192	{
		1193	if (time_update_monotonic (EV_A))
580	{	1194	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1195	ev_tstamp odiff = rtmn_diff;
582		1196
583	if (fabs (diff) >= 1e-4)	1197	for (i = 4; --i; ) /* loop a few times, before making important decisions */
584	{	1198	{
585	ev_periodic_stop (w);	1199	rtmn_diff = ev_rt_now - mn_now;
586	ev_periodic_start (w);
587		1200
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1201	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1202	return; /* all is well */
		1203
		1204	ev_rt_now = ev_time ();
		1205	mn_now = get_clock ();
		1206	now_floor = mn_now;
589	}	1207	}
		1208
		1209	# if EV_PERIODICS
		1210	periodics_reschedule (EV_A);
		1211	# endif
		1212	/* no timer adjustment, as the monotonic clock doesn't jump */
		1213	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
590	}	1214	}
591	}	1215	}
592	}	1216	else
593		1217	#endif
594	static void	1218	{
595	time_update (void)
596	{
597	int i;
598
599	ev_now = ev_time ();	1219	ev_rt_now = ev_time ();
600		1220
601	if (have_monotonic)	1221	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
602	{
603	ev_tstamp odiff = diff;
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	1222	{
607	now = get_clock ();	1223	#if EV_PERIODICS
608	diff = ev_now - now;
609
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)
611	return; /* all is well */
612
613	ev_now = ev_time ();
614	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}
619	else
620	{
621	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
622	{
623	periodics_reschedule (ev_now - now);	1224	periodics_reschedule (EV_A);
		1225	#endif
624		1226
625	/* adjust timers. this is easy, as the offset is the same for all */	1227	/* adjust timers. this is easy, as the offset is the same for all */
626	for (i = 0; i < timercnt; ++i)	1228	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	1229	((WT)timers [i])->at += ev_rt_now - mn_now;
628	}	1230	}
629		1231
630	now = ev_now;	1232	mn_now = ev_rt_now;
631	}	1233	}
632	}	1234	}
633		1235
634	int ev_loop_done;	1236	void
		1237	ev_ref (EV_P)
		1238	{
		1239	++activecnt;
		1240	}
635		1241
		1242	void
		1243	ev_unref (EV_P)
		1244	{
		1245	--activecnt;
		1246	}
		1247
		1248	static int loop_done;
		1249
		1250	void
636	void ev_loop (int flags)	1251	ev_loop (EV_P_ int flags)
637	{	1252	{
638	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1253	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1254	? EVUNLOOP_ONE
		1255	: EVUNLOOP_CANCEL;
640		1256
641	do	1257	while (activecnt)
642	{	1258	{
643	/* queue check watchers (and execute them) */	1259	/* queue check watchers (and execute them) */
644	if (preparecnt)	1260	if (expect_false (preparecnt))
645	{	1261	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1262	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	1263	call_pending (EV_A);
648	}	1264	}
649		1265
		1266	/* we might have forked, so reify kernel state if necessary */
		1267	if (expect_false (postfork))
		1268	loop_fork (EV_A);
		1269
650	/* update fd-related kernel structures */	1270	/* update fd-related kernel structures */
651	fd_reify ();	1271	fd_reify (EV_A);
652		1272
653	/* calculate blocking time */	1273	/* calculate blocking time */
		1274	{
		1275	double block;
654		1276
655	/* we only need this for !monotonic clockor timers, but as we basically
656	always have timers, we just calculate it always */
657	ev_now = ev_time ();
658
659	if (flags & EVLOOP_NONBLOCK || idlecnt)	1277	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;	1278	block = 0.; /* do not block at all */
661	else	1279	else
662	{	1280	{
		1281	/* update time to cancel out callback processing overhead */
		1282	#if EV_USE_MONOTONIC
		1283	if (expect_true (have_monotonic))
		1284	time_update_monotonic (EV_A);
		1285	else
		1286	#endif
		1287	{
		1288	ev_rt_now = ev_time ();
		1289	mn_now = ev_rt_now;
		1290	}
		1291
663	block = MAX_BLOCKTIME;	1292	block = MAX_BLOCKTIME;
664		1293
665	if (timercnt)	1294	if (timercnt)
666	{	1295	{
667	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1296	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
668	if (block > to) block = to;	1297	if (block > to) block = to;
669	}	1298	}
670		1299
		1300	#if EV_PERIODICS
671	if (periodiccnt)	1301	if (periodiccnt)
672	{	1302	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1303	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
674	if (block > to) block = to;	1304	if (block > to) block = to;
675	}	1305	}
		1306	#endif
676		1307
677	if (block < 0.) block = 0.;	1308	if (expect_false (block < 0.)) block = 0.;
678	}	1309	}
679		1310
680	method_poll (block);	1311	backend_poll (EV_A_ block);
		1312	}
681		1313
682	/* update ev_now, do magic */	1314	/* update ev_rt_now, do magic */
683	time_update ();	1315	time_update (EV_A);
684		1316
685	/* queue pending timers and reschedule them */	1317	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1318	timers_reify (EV_A); /* relative timers called last */
		1319	#if EV_PERIODICS
687	periodics_reify (); /* absolute timers called first */	1320	periodics_reify (EV_A); /* absolute timers called first */
		1321	#endif
688		1322
689	/* queue idle watchers unless io or timers are pending */	1323	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	1324	if (idlecnt && !any_pending (EV_A))
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1325	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		1326
693	/* queue check watchers, to be executed first */	1327	/* queue check watchers, to be executed first */
694	if (checkcnt)	1328	if (expect_false (checkcnt))
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1329	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1330
697	call_pending ();	1331	call_pending (EV_A);
698	}
699	while (!ev_loop_done);
700		1332
701	if (ev_loop_done != 2)	1333	if (expect_false (loop_done))
		1334	break;
		1335	}
		1336
		1337	if (loop_done == EVUNLOOP_ONE)
		1338	loop_done = EVUNLOOP_CANCEL;
		1339	}
		1340
		1341	void
		1342	ev_unloop (EV_P_ int how)
		1343	{
702	ev_loop_done = 0;	1344	loop_done = how;
703	}	1345	}
704		1346
705	/*****************************************************************************/	1347	/*****************************************************************************/
706		1348
707	static void	1349	inline void
708	wlist_add (WL *head, WL elem)	1350	wlist_add (WL *head, WL elem)
709	{	1351	{
710	elem->next = *head;	1352	elem->next = *head;
711	*head = elem;	1353	*head = elem;
712	}	1354	}
713		1355
714	static void	1356	inline void
715	wlist_del (WL *head, WL elem)	1357	wlist_del (WL *head, WL elem)
716	{	1358	{
717	while (*head)	1359	while (*head)
718	{	1360	{
719	if (*head == elem)	1361	if (*head == elem)
…		…
724		1366
725	head = &(*head)->next;	1367	head = &(*head)->next;
726	}	1368	}
727	}	1369	}
728		1370
729	static void	1371	inline void
730	ev_clear (W w)	1372	ev_clear_pending (EV_P_ W w)
731	{	1373	{
732	if (w->pending)	1374	if (w->pending)
733	{	1375	{
734	pendings [w->pending - 1].w = 0;	1376	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1377	w->pending = 0;
736	}	1378	}
737	}	1379	}
738		1380
739	static void	1381	inline void
740	ev_start (W w, int active)	1382	ev_start (EV_P_ W w, int active)
741	{	1383	{
		1384	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1385	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1386
742	w->active = active;	1387	w->active = active;
		1388	ev_ref (EV_A);
743	}	1389	}
744		1390
745	static void	1391	inline void
746	ev_stop (W w)	1392	ev_stop (EV_P_ W w)
747	{	1393	{
		1394	ev_unref (EV_A);
748	w->active = 0;	1395	w->active = 0;
749	}	1396	}
750		1397
751	/*****************************************************************************/	1398	/*****************************************************************************/
752		1399
753	void	1400	void
754	ev_io_start (struct ev_io *w)	1401	ev_io_start (EV_P_ struct ev_io *w)
755	{	1402	{
756	if (ev_is_active (w))
757	return;
758
759	int fd = w->fd;	1403	int fd = w->fd;
760		1404
		1405	if (expect_false (ev_is_active (w)))
		1406	return;
		1407
		1408	assert (("ev_io_start called with negative fd", fd >= 0));
		1409
761	ev_start ((W)w, 1);	1410	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1411	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1412	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1413
765	fd_change (fd);	1414	fd_change (EV_A_ fd);
766	}	1415	}
767		1416
768	void	1417	void
769	ev_io_stop (struct ev_io *w)	1418	ev_io_stop (EV_P_ struct ev_io *w)
770	{	1419	{
771	ev_clear ((W)w);	1420	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1421	if (expect_false (!ev_is_active (w)))
773	return;	1422	return;
		1423
		1424	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
774		1425
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1426	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1427	ev_stop (EV_A_ (W)w);
777		1428
778	fd_change (w->fd);	1429	fd_change (EV_A_ w->fd);
779	}	1430	}
780		1431
781	void	1432	void
782	ev_timer_start (struct ev_timer *w)	1433	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1434	{
784	if (ev_is_active (w))	1435	if (expect_false (ev_is_active (w)))
785	return;	1436	return;
786		1437
787	w->at += now;	1438	((WT)w)->at += mn_now;
788		1439
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1440	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1441
791	ev_start ((W)w, ++timercnt);	1442	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1443	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
793	timers [timercnt - 1] = w;	1444	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1445	upheap ((WT *)timers, timercnt - 1);
795	}
796		1446
		1447	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1448	}
		1449
797	void	1450	void
798	ev_timer_stop (struct ev_timer *w)	1451	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1452	{
800	ev_clear ((W)w);	1453	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1454	if (expect_false (!ev_is_active (w)))
802	return;	1455	return;
803		1456
		1457	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1458
804	if (w->active < timercnt--)	1459	if (expect_true (((W)w)->active < timercnt--))
805	{	1460	{
806	timers [w->active - 1] = timers [timercnt];	1461	timers [((W)w)->active - 1] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1462	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
808	}	1463	}
809		1464
810	w->at = w->repeat;	1465	((WT)w)->at -= mn_now;
811		1466
812	ev_stop ((W)w);	1467	ev_stop (EV_A_ (W)w);
813	}	1468	}
814		1469
815	void	1470	void
816	ev_timer_again (struct ev_timer *w)	1471	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1472	{
818	if (ev_is_active (w))	1473	if (ev_is_active (w))
819	{	1474	{
820	if (w->repeat)	1475	if (w->repeat)
821	{	1476	{
822	w->at = now + w->repeat;	1477	((WT)w)->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1478	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
824	}	1479	}
825	else	1480	else
826	ev_timer_stop (w);	1481	ev_timer_stop (EV_A_ w);
827	}	1482	}
828	else if (w->repeat)	1483	else if (w->repeat)
		1484	{
		1485	w->at = w->repeat;
829	ev_timer_start (w);	1486	ev_timer_start (EV_A_ w);
		1487	}
830	}	1488	}
831		1489
		1490	#if EV_PERIODICS
832	void	1491	void
833	ev_periodic_start (struct ev_periodic *w)	1492	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1493	{
835	if (ev_is_active (w))	1494	if (expect_false (ev_is_active (w)))
836	return;	1495	return;
837		1496
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1497	if (w->reschedule_cb)
839		1498	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1499	else if (w->interval)
		1500	{
		1501	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1502	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1503	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1504	}
843		1505
844	ev_start ((W)w, ++periodiccnt);	1506	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1507	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
846	periodics [periodiccnt - 1] = w;	1508	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1509	upheap ((WT *)periodics, periodiccnt - 1);
848	}
849		1510
		1511	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1512	}
		1513
850	void	1514	void
851	ev_periodic_stop (struct ev_periodic *w)	1515	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1516	{
853	ev_clear ((W)w);	1517	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1518	if (expect_false (!ev_is_active (w)))
855	return;	1519	return;
856		1520
		1521	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1522
857	if (w->active < periodiccnt--)	1523	if (expect_true (((W)w)->active < periodiccnt--))
858	{	1524	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1525	periodics [((W)w)->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1526	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
861	}	1527	}
862		1528
863	ev_stop ((W)w);	1529	ev_stop (EV_A_ (W)w);
864	}	1530	}
865		1531
866	void	1532	void
		1533	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1534	{
		1535	/* TODO: use adjustheap and recalculation */
		1536	ev_periodic_stop (EV_A_ w);
		1537	ev_periodic_start (EV_A_ w);
		1538	}
		1539	#endif
		1540
		1541	void
		1542	ev_idle_start (EV_P_ struct ev_idle *w)
		1543	{
		1544	if (expect_false (ev_is_active (w)))
		1545	return;
		1546
		1547	ev_start (EV_A_ (W)w, ++idlecnt);
		1548	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1549	idles [idlecnt - 1] = w;
		1550	}
		1551
		1552	void
		1553	ev_idle_stop (EV_P_ struct ev_idle *w)
		1554	{
		1555	ev_clear_pending (EV_A_ (W)w);
		1556	if (expect_false (!ev_is_active (w)))
		1557	return;
		1558
		1559	idles [((W)w)->active - 1] = idles [--idlecnt];
		1560	ev_stop (EV_A_ (W)w);
		1561	}
		1562
		1563	void
		1564	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1565	{
		1566	if (expect_false (ev_is_active (w)))
		1567	return;
		1568
		1569	ev_start (EV_A_ (W)w, ++preparecnt);
		1570	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1571	prepares [preparecnt - 1] = w;
		1572	}
		1573
		1574	void
		1575	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1576	{
		1577	ev_clear_pending (EV_A_ (W)w);
		1578	if (expect_false (!ev_is_active (w)))
		1579	return;
		1580
		1581	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1582	ev_stop (EV_A_ (W)w);
		1583	}
		1584
		1585	void
		1586	ev_check_start (EV_P_ struct ev_check *w)
		1587	{
		1588	if (expect_false (ev_is_active (w)))
		1589	return;
		1590
		1591	ev_start (EV_A_ (W)w, ++checkcnt);
		1592	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1593	checks [checkcnt - 1] = w;
		1594	}
		1595
		1596	void
		1597	ev_check_stop (EV_P_ struct ev_check *w)
		1598	{
		1599	ev_clear_pending (EV_A_ (W)w);
		1600	if (expect_false (!ev_is_active (w)))
		1601	return;
		1602
		1603	checks [((W)w)->active - 1] = checks [--checkcnt];
		1604	ev_stop (EV_A_ (W)w);
		1605	}
		1606
		1607	#ifndef SA_RESTART
		1608	# define SA_RESTART 0
		1609	#endif
		1610
		1611	void
867	ev_signal_start (struct ev_signal *w)	1612	ev_signal_start (EV_P_ struct ev_signal *w)
868	{	1613	{
		1614	#if EV_MULTIPLICITY
		1615	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1616	#endif
869	if (ev_is_active (w))	1617	if (expect_false (ev_is_active (w)))
870	return;	1618	return;
871		1619
		1620	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1621
872	ev_start ((W)w, 1);	1622	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1623	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1624	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1625
876	if (!w->next)	1626	if (!((WL)w)->next)
877	{	1627	{
		1628	#if _WIN32
		1629	signal (w->signum, sighandler);
		1630	#else
878	struct sigaction sa;	1631	struct sigaction sa;
879	sa.sa_handler = sighandler;	1632	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1633	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1634	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1635	sigaction (w->signum, &sa, 0);
		1636	#endif
883	}	1637	}
884	}	1638	}
885		1639
886	void	1640	void
887	ev_signal_stop (struct ev_signal *w)	1641	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1642	{
889	ev_clear ((W)w);	1643	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1644	if (expect_false (!ev_is_active (w)))
891	return;	1645	return;
892		1646
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1647	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1648	ev_stop (EV_A_ (W)w);
895		1649
896	if (!signals [w->signum - 1].head)	1650	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1651	signal (w->signum, SIG_DFL);
898	}	1652	}
899		1653
900	void	1654	void
901	ev_idle_start (struct ev_idle *w)
902	{
903	if (ev_is_active (w))
904	return;
905
906	ev_start ((W)w, ++idlecnt);
907	array_needsize (idles, idlemax, idlecnt, );
908	idles [idlecnt - 1] = w;
909	}
910
911	void
912	ev_idle_stop (struct ev_idle *w)
913	{
914	ev_clear ((W)w);
915	if (ev_is_active (w))
916	return;
917
918	idles [w->active - 1] = idles [--idlecnt];
919	ev_stop ((W)w);
920	}
921
922	void
923	ev_prepare_start (struct ev_prepare *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );
930	prepares [preparecnt - 1] = w;
931	}
932
933	void
934	ev_prepare_stop (struct ev_prepare *w)
935	{
936	ev_clear ((W)w);
937	if (ev_is_active (w))
938	return;
939
940	prepares [w->active - 1] = prepares [--preparecnt];
941	ev_stop ((W)w);
942	}
943
944	void
945	ev_check_start (struct ev_check *w)
946	{
947	if (ev_is_active (w))
948	return;
949
950	ev_start ((W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );
952	checks [checkcnt - 1] = w;
953	}
954
955	void
956	ev_check_stop (struct ev_check *w)
957	{
958	ev_clear ((W)w);
959	if (ev_is_active (w))
960	return;
961
962	checks [w->active - 1] = checks [--checkcnt];
963	ev_stop ((W)w);
964	}
965
966	void
967	ev_child_start (struct ev_child *w)	1655	ev_child_start (EV_P_ struct ev_child *w)
968	{	1656	{
		1657	#if EV_MULTIPLICITY
		1658	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1659	#endif
969	if (ev_is_active (w))	1660	if (expect_false (ev_is_active (w)))
970	return;	1661	return;
971		1662
972	ev_start ((W)w, 1);	1663	ev_start (EV_A_ (W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1664	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}	1665	}
975		1666
976	void	1667	void
977	ev_child_stop (struct ev_child *w)	1668	ev_child_stop (EV_P_ struct ev_child *w)
978	{	1669	{
979	ev_clear ((W)w);	1670	ev_clear_pending (EV_A_ (W)w);
980	if (ev_is_active (w))	1671	if (expect_false (!ev_is_active (w)))
981	return;	1672	return;
982		1673
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1674	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1675	ev_stop (EV_A_ (W)w);
985	}	1676	}
		1677
		1678	#if EV_MULTIPLICITY
		1679	static void
		1680	embed_cb (EV_P_ struct ev_io *io, int revents)
		1681	{
		1682	struct ev_embed *w = (struct ev_embed *)(((char *)io) - offsetof (struct ev_embed, io));
		1683
		1684	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1685	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1686	}
		1687
		1688	void
		1689	ev_embed_start (EV_P_ struct ev_embed *w)
		1690	{
		1691	if (expect_false (ev_is_active (w)))
		1692	return;
		1693
		1694	{
		1695	struct ev_loop *loop = w->loop;
		1696	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1697	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1698	}
		1699
		1700	ev_io_start (EV_A_ &w->io);
		1701	ev_start (EV_A_ (W)w, 1);
		1702	}
		1703
		1704	void
		1705	ev_embed_stop (EV_P_ struct ev_embed *w)
		1706	{
		1707	ev_clear_pending (EV_A_ (W)w);
		1708	if (expect_false (!ev_is_active (w)))
		1709	return;
		1710
		1711	ev_io_stop (EV_A_ &w->io);
		1712	ev_stop (EV_A_ (W)w);
		1713	}
		1714	#endif
986		1715
987	/*****************************************************************************/	1716	/*****************************************************************************/
988		1717
989	struct ev_once	1718	struct ev_once
990	{	1719	{
…		…
993	void (*cb)(int revents, void *arg);	1722	void (*cb)(int revents, void *arg);
994	void *arg;	1723	void *arg;
995	};	1724	};
996		1725
997	static void	1726	static void
998	once_cb (struct ev_once *once, int revents)	1727	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1728	{
1000	void (*cb)(int revents, void *arg) = once->cb;	1729	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	1730	void *arg = once->arg;
1002		1731
1003	ev_io_stop (&once->io);	1732	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1733	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1734	ev_free (once);
1006		1735
1007	cb (revents, arg);	1736	cb (revents, arg);
1008	}	1737	}
1009		1738
1010	static void	1739	static void
1011	once_cb_io (struct ev_io *w, int revents)	1740	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1741	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1742	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014	}	1743	}
1015		1744
1016	static void	1745	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1746	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1747	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1748	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020	}	1749	}
1021		1750
1022	void	1751	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1752	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024	{	1753	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1754	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026		1755
1027	if (!once)	1756	if (expect_false (!once))
		1757	{
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1758	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029	else	1759	return;
1030	{	1760	}
		1761
1031	once->cb = cb;	1762	once->cb = cb;
1032	once->arg = arg;	1763	once->arg = arg;
1033		1764
1034	ev_watcher_init (&once->io, once_cb_io);	1765	ev_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1766	if (fd >= 0)
1036	{	1767	{
1037	ev_io_set (&once->io, fd, events);	1768	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1769	ev_io_start (EV_A_ &once->io);
1039	}	1770	}
1040		1771
1041	ev_watcher_init (&once->to, once_cb_to);	1772	ev_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1773	if (timeout >= 0.)
1043	{	1774	{
1044	ev_timer_set (&once->to, timeout, 0.);	1775	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1776	ev_timer_start (EV_A_ &once->to);
1046	}
1047	}
1048	}
1049
1050	/*****************************************************************************/
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{	1777	}
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif
1106
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}	1778	}
1127		1779
		1780	#ifdef __cplusplus
		1781	}
1128	#endif	1782	#endif
1129		1783
1130
1131
1132

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