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Comparing libev/ev.c (file contents):
Revision 1.33 by root, Thu Nov 1 11:11:22 2007 UTC vs.
Revision 1.126 by root, Sun Nov 18 01:25:23 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	*/
29	#if EV_USE_CONFIG_H	31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
30	# include "config.h"	37	# include "config.h"
		38
		39	# if HAVE_CLOCK_GETTIME
		40	# ifndef EV_USE_MONOTONIC
		41	# define EV_USE_MONOTONIC 1
		42	# endif
		43	# ifndef EV_USE_REALTIME
		44	# define EV_USE_REALTIME 1
		45	# endif
		46	# else
		47	# ifndef EV_USE_MONOTONIC
		48	# define EV_USE_MONOTONIC 0
		49	# endif
		50	# ifndef EV_USE_REALTIME
		51	# define EV_USE_REALTIME 0
		52	# endif
		53	# endif
		54
		55	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)
		56	# define EV_USE_SELECT 1
		57	# else
		58	# define EV_USE_SELECT 0
		59	# endif
		60
		61	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)
		62	# define EV_USE_POLL 1
		63	# else
		64	# define EV_USE_POLL 0
		65	# endif
		66
		67	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)
		68	# define EV_USE_EPOLL 1
		69	# else
		70	# define EV_USE_EPOLL 0
		71	# endif
		72
		73	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)
		74	# define EV_USE_KQUEUE 1
		75	# else
		76	# define EV_USE_KQUEUE 0
		77	# endif
		78
		79	# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT)
		80	# define EV_USE_PORT 1
		81	# else
		82	# define EV_USE_PORT 0
		83	# endif
		84
31	#endif	85	#endif
32		86
33	#include <math.h>	87	#include <math.h>
34	#include <stdlib.h>	88	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	89	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	90	#include <stddef.h>
39		91
40	#include <stdio.h>	92	#include <stdio.h>
41		93
42	#include <assert.h>	94	#include <assert.h>
43	#include <errno.h>	95	#include <errno.h>
44	#include <sys/types.h>	96	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	97	#include <time.h>
48		98
		99	#include <signal.h>
		100
		101	#ifndef _WIN32
		102	# include <unistd.h>
		103	# include <sys/time.h>
		104	# include <sys/wait.h>
		105	#else
		106	# define WIN32_LEAN_AND_MEAN
		107	# include <windows.h>
		108	# ifndef EV_SELECT_IS_WINSOCKET
		109	# define EV_SELECT_IS_WINSOCKET 1
		110	# endif
		111	#endif
		112
		113	/**/
		114
49	#ifndef EV_USE_MONOTONIC	115	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	116	# define EV_USE_MONOTONIC 0
52	# endif	117	#endif
		118
		119	#ifndef EV_USE_REALTIME
		120	# define EV_USE_REALTIME 0
53	#endif	121	#endif
54		122
55	#ifndef EV_USE_SELECT	123	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	124	# define EV_USE_SELECT 1
57	#endif	125	#endif
58		126
		127	#ifndef EV_USE_POLL
		128	# ifdef _WIN32
		129	# define EV_USE_POLL 0
		130	# else
		131	# define EV_USE_POLL 1
		132	# endif
		133	#endif
		134
59	#ifndef EV_USE_EPOLL	135	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	136	# define EV_USE_EPOLL 0
61	#endif	137	#endif
62		138
		139	#ifndef EV_USE_KQUEUE
		140	# define EV_USE_KQUEUE 0
		141	#endif
		142
		143	#ifndef EV_USE_PORT
		144	# define EV_USE_PORT 0
		145	#endif
		146
		147	/**/
		148
		149	/* darwin simply cannot be helped */
		150	#ifdef __APPLE__
		151	# undef EV_USE_POLL
		152	# undef EV_USE_KQUEUE
		153	#endif
		154
		155	#ifndef CLOCK_MONOTONIC
		156	# undef EV_USE_MONOTONIC
		157	# define EV_USE_MONOTONIC 0
		158	#endif
		159
63	#ifndef CLOCK_REALTIME	160	#ifndef CLOCK_REALTIME
		161	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	162	# define EV_USE_REALTIME 0
65	#endif	163	#endif
66	#ifndef EV_USE_REALTIME	164
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	165	#if EV_SELECT_IS_WINSOCKET
		166	# include <winsock.h>
68	#endif	167	#endif
		168
		169	/**/
69		170
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	171	#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) */	172	#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 */	173	#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 */	174	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
74		175
		176	#ifdef EV_H
		177	# include EV_H
		178	#else
75	#include "ev.h"	179	# include "ev.h"
		180	#endif
		181
		182	#if __GNUC__ >= 3
		183	# define expect(expr,value) __builtin_expect ((expr),(value))
		184	# define inline static inline
		185	#else
		186	# define expect(expr,value) (expr)
		187	# define inline static
		188	#endif
		189
		190	#define expect_false(expr) expect ((expr) != 0, 0)
		191	#define expect_true(expr) expect ((expr) != 0, 1)
		192
		193	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		194	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		195
		196	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		197	#define EMPTY2(a,b) /* used to suppress some warnings */
76		198
77	typedef struct ev_watcher *W;	199	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	200	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	201	typedef struct ev_watcher_time *WT;
80		202
81	static ev_tstamp now, diff; /* monotonic clock */	203	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		204
		205	#ifdef _WIN32
		206	# include "ev_win32.c"
		207	#endif
		208
		209	/*****************************************************************************/
		210
		211	static void (*syserr_cb)(const char *msg);
		212
		213	void ev_set_syserr_cb (void (*cb)(const char *msg))
		214	{
		215	syserr_cb = cb;
		216	}
		217
		218	static void
		219	syserr (const char *msg)
		220	{
		221	if (!msg)
		222	msg = "(libev) system error";
		223
		224	if (syserr_cb)
		225	syserr_cb (msg);
		226	else
		227	{
		228	perror (msg);
		229	abort ();
		230	}
		231	}
		232
		233	static void *(*alloc)(void *ptr, long size);
		234
		235	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		236	{
		237	alloc = cb;
		238	}
		239
		240	static void *
		241	ev_realloc (void *ptr, long size)
		242	{
		243	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		244
		245	if (!ptr && size)
		246	{
		247	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		248	abort ();
		249	}
		250
		251	return ptr;
		252	}
		253
		254	#define ev_malloc(size) ev_realloc (0, (size))
		255	#define ev_free(ptr) ev_realloc ((ptr), 0)
		256
		257	/*****************************************************************************/
		258
		259	typedef struct
		260	{
		261	WL head;
		262	unsigned char events;
		263	unsigned char reify;
		264	#if EV_SELECT_IS_WINSOCKET
		265	SOCKET handle;
		266	#endif
		267	} ANFD;
		268
		269	typedef struct
		270	{
		271	W w;
		272	int events;
		273	} ANPENDING;
		274
		275	#if EV_MULTIPLICITY
		276
		277	struct ev_loop
		278	{
		279	ev_tstamp ev_rt_now;
		280	#define ev_rt_now ((loop)->ev_rt_now)
		281	#define VAR(name,decl) decl;
		282	#include "ev_vars.h"
		283	#undef VAR
		284	};
		285	#include "ev_wrap.h"
		286
		287	static struct ev_loop default_loop_struct;
		288	struct ev_loop *ev_default_loop_ptr;
		289
		290	#else
		291
82	ev_tstamp ev_now;	292	ev_tstamp ev_rt_now;
83	int ev_method;	293	#define VAR(name,decl) static decl;
		294	#include "ev_vars.h"
		295	#undef VAR
84		296
85	static int have_monotonic; /* runtime */	297	static int ev_default_loop_ptr;
86		298
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	299	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		300
91	/*****************************************************************************/	301	/*****************************************************************************/
92		302
93	ev_tstamp	303	ev_tstamp
94	ev_time (void)	304	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	312	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	313	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	314	#endif
105	}	315	}
106		316
107	static ev_tstamp	317	inline ev_tstamp
108	get_clock (void)	318	get_clock (void)
109	{	319	{
110	#if EV_USE_MONOTONIC	320	#if EV_USE_MONOTONIC
111	if (have_monotonic)	321	if (expect_true (have_monotonic))
112	{	322	{
113	struct timespec ts;	323	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	324	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	325	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	326	}
117	#endif	327	#endif
118		328
119	return ev_time ();	329	return ev_time ();
120	}	330	}
121		331
		332	#if EV_MULTIPLICITY
		333	ev_tstamp
		334	ev_now (EV_P)
		335	{
		336	return ev_rt_now;
		337	}
		338	#endif
		339
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	340	#define array_roundsize(type,n) (((n) | 4) & ~3)
123		341
124	#define array_needsize(base,cur,cnt,init) \	342	#define array_needsize(type,base,cur,cnt,init) \
125	if ((cnt) > cur) \	343	if (expect_false ((cnt) > cur)) \
126	{ \	344	{ \
127	int newcnt = cur; \	345	int newcnt = cur; \
128	do \	346	do \
129	{ \	347	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	348	newcnt = array_roundsize (type, newcnt << 1); \
131	} \	349	} \
132	while ((cnt) > newcnt); \	350	while ((cnt) > newcnt); \
133	\	351	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \	352	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
135	init (base + cur, newcnt - cur); \	353	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	354	cur = newcnt; \
137	}	355	}
		356
		357	#define array_slim(type,stem) \
		358	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		359	{ \
		360	stem ## max = array_roundsize (stem ## cnt >> 1); \
		361	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		362	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		363	}
		364
		365	#define array_free(stem, idx) \
		366	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
138		367
139	/*****************************************************************************/	368	/*****************************************************************************/
140
141	typedef struct
142	{
143	struct ev_io *head;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147
148	static ANFD *anfds;
149	static int anfdmax;
150		369
151	static void	370	static void
152	anfds_init (ANFD *base, int count)	371	anfds_init (ANFD *base, int count)
153	{	372	{
154	while (count--)	373	while (count--)
…		…
159		378
160	++base;	379	++base;
161	}	380	}
162	}	381	}
163		382
164	typedef struct	383	void
		384	ev_feed_event (EV_P_ void *w, int revents)
165	{	385	{
166	W w;	386	W w_ = (W)w;
167	int events;
168	} ANPENDING;
169		387
170	static ANPENDING *pendings;	388	if (expect_false (w_->pending))
171	static int pendingmax, pendingcnt;
172
173	static void
174	event (W w, int events)
175	{
176	if (w->pending)
177	{	389	{
178	pendings [w->pending - 1].events |= events;	390	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
179	return;	391	return;
180	}	392	}
181		393
182	w->pending = ++pendingcnt;	394	w_->pending = ++pendingcnt [ABSPRI (w_)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	395	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
184	pendings [pendingcnt - 1].w = w;	396	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
185	pendings [pendingcnt - 1].events = events;	397	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
186	}	398	}
187		399
188	static void	400	static void
189	queue_events (W *events, int eventcnt, int type)	401	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	402	{
191	int i;	403	int i;
192		404
193	for (i = 0; i < eventcnt; ++i)	405	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	406	ev_feed_event (EV_A_ events [i], type);
195	}	407	}
196		408
197	static void	409	inline void
198	fd_event (int fd, int events)	410	fd_event (EV_P_ int fd, int revents)
199	{	411	{
200	ANFD *anfd = anfds + fd;	412	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	413	struct ev_io *w;
202		414
203	for (w = anfd->head; w; w = w->next)	415	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
204	{	416	{
205	int ev = w->events & events;	417	int ev = w->events & revents;
206		418
207	if (ev)	419	if (ev)
208	event ((W)w, ev);	420	ev_feed_event (EV_A_ (W)w, ev);
209	}	421	}
		422	}
		423
		424	void
		425	ev_feed_fd_event (EV_P_ int fd, int revents)
		426	{
		427	fd_event (EV_A_ fd, revents);
210	}	428	}
211		429
212	/*****************************************************************************/	430	/*****************************************************************************/
213		431
214	static int *fdchanges;	432	inline void
215	static int fdchangemax, fdchangecnt;	433	fd_reify (EV_P)
216
217	static void
218	fd_reify (void)
219	{	434	{
220	int i;	435	int i;
221		436
222	for (i = 0; i < fdchangecnt; ++i)	437	for (i = 0; i < fdchangecnt; ++i)
223	{	438	{
…		…
225	ANFD *anfd = anfds + fd;	440	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	441	struct ev_io *w;
227		442
228	int events = 0;	443	int events = 0;
229		444
230	for (w = anfd->head; w; w = w->next)	445	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
231	events |= w->events;	446	events |= w->events;
232		447
		448	#if EV_SELECT_IS_WINSOCKET
		449	if (events)
		450	{
		451	unsigned long argp;
		452	anfd->handle = _get_osfhandle (fd);
		453	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		454	}
		455	#endif
		456
233	anfd->reify = 0;	457	anfd->reify = 0;
234		458
235	if (anfd->events != events)
236	{
237	method_modify (fd, anfd->events, events);	459	method_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	460	anfd->events = events;
239	}
240	}	461	}
241		462
242	fdchangecnt = 0;	463	fdchangecnt = 0;
243	}	464	}
244		465
245	static void	466	static void
246	fd_change (int fd)	467	fd_change (EV_P_ int fd)
247	{	468	{
248	if (anfds [fd].reify || fdchangecnt < 0)	469	if (expect_false (anfds [fd].reify))
249	return;	470	return;
250		471
251	anfds [fd].reify = 1;	472	anfds [fd].reify = 1;
252		473
253	++fdchangecnt;	474	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	475	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
255	fdchanges [fdchangecnt - 1] = fd;	476	fdchanges [fdchangecnt - 1] = fd;
256	}	477	}
257		478
		479	static void
		480	fd_kill (EV_P_ int fd)
		481	{
		482	struct ev_io *w;
		483
		484	while ((w = (struct ev_io *)anfds [fd].head))
		485	{
		486	ev_io_stop (EV_A_ w);
		487	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		488	}
		489	}
		490
		491	inline int
		492	fd_valid (int fd)
		493	{
		494	#ifdef _WIN32
		495	return _get_osfhandle (fd) != -1;
		496	#else
		497	return fcntl (fd, F_GETFD) != -1;
		498	#endif
		499	}
		500
258	/* called on EBADF to verify fds */	501	/* called on EBADF to verify fds */
259	static void	502	static void
260	fd_recheck (void)	503	fd_ebadf (EV_P)
261	{	504	{
262	int fd;	505	int fd;
263		506
264	for (fd = 0; fd < anfdmax; ++fd)	507	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	508	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	509	if (!fd_valid (fd) == -1 && errno == EBADF)
267	while (anfds [fd].head)	510	fd_kill (EV_A_ fd);
		511	}
		512
		513	/* called on ENOMEM in select/poll to kill some fds and retry */
		514	static void
		515	fd_enomem (EV_P)
		516	{
		517	int fd;
		518
		519	for (fd = anfdmax; fd--; )
		520	if (anfds [fd].events)
268	{	521	{
269	ev_io_stop (anfds [fd].head);	522	fd_kill (EV_A_ fd);
270	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	523	return;
271	}	524	}
		525	}
		526
		527	/* usually called after fork if method needs to re-arm all fds from scratch */
		528	static void
		529	fd_rearm_all (EV_P)
		530	{
		531	int fd;
		532
		533	/* this should be highly optimised to not do anything but set a flag */
		534	for (fd = 0; fd < anfdmax; ++fd)
		535	if (anfds [fd].events)
		536	{
		537	anfds [fd].events = 0;
		538	fd_change (EV_A_ fd);
		539	}
272	}	540	}
273		541
274	/*****************************************************************************/	542	/*****************************************************************************/
275		543
276	static struct ev_timer **timers;
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void	544	static void
283	upheap (WT *timers, int k)	545	upheap (WT *heap, int k)
284	{	546	{
285	WT w = timers [k];	547	WT w = heap [k];
286		548
287	while (k && timers [k >> 1]->at > w->at)	549	while (k && heap [k >> 1]->at > w->at)
288	{	550	{
289	timers [k] = timers [k >> 1];	551	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	552	((W)heap [k])->active = k + 1;
291	k >>= 1;	553	k >>= 1;
292	}	554	}
293		555
294	timers [k] = w;	556	heap [k] = w;
295	timers [k]->active = k + 1;	557	((W)heap [k])->active = k + 1;
296		558
297	}	559	}
298		560
299	static void	561	static void
300	downheap (WT *timers, int N, int k)	562	downheap (WT *heap, int N, int k)
301	{	563	{
302	WT w = timers [k];	564	WT w = heap [k];
303		565
304	while (k < (N >> 1))	566	while (k < (N >> 1))
305	{	567	{
306	int j = k << 1;	568	int j = k << 1;
307		569
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	570	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	571	++j;
310		572
311	if (w->at <= timers [j]->at)	573	if (w->at <= heap [j]->at)
312	break;	574	break;
313		575
314	timers [k] = timers [j];	576	heap [k] = heap [j];
315	timers [k]->active = k + 1;	577	((W)heap [k])->active = k + 1;
316	k = j;	578	k = j;
317	}	579	}
318		580
319	timers [k] = w;	581	heap [k] = w;
320	timers [k]->active = k + 1;	582	((W)heap [k])->active = k + 1;
		583	}
		584
		585	inline void
		586	adjustheap (WT *heap, int N, int k)
		587	{
		588	upheap (heap, k);
		589	downheap (heap, N, k);
321	}	590	}
322		591
323	/*****************************************************************************/	592	/*****************************************************************************/
324		593
325	typedef struct	594	typedef struct
326	{	595	{
327	struct ev_signal *head;	596	WL head;
328	sig_atomic_t gotsig;	597	sig_atomic_t volatile gotsig;
329	} ANSIG;	598	} ANSIG;
330		599
331	static ANSIG *signals;	600	static ANSIG *signals;
332	static int signalmax;	601	static int signalmax;
333		602
334	static int sigpipe [2];	603	static int sigpipe [2];
335	static sig_atomic_t gotsig;	604	static sig_atomic_t volatile gotsig;
336	static struct ev_io sigev;	605	static struct ev_io sigev;
337		606
338	static void	607	static void
339	signals_init (ANSIG *base, int count)	608	signals_init (ANSIG *base, int count)
340	{	609	{
…		…
348	}	617	}
349		618
350	static void	619	static void
351	sighandler (int signum)	620	sighandler (int signum)
352	{	621	{
		622	#if _WIN32
		623	signal (signum, sighandler);
		624	#endif
		625
353	signals [signum - 1].gotsig = 1;	626	signals [signum - 1].gotsig = 1;
354		627
355	if (!gotsig)	628	if (!gotsig)
356	{	629	{
		630	int old_errno = errno;
357	gotsig = 1;	631	gotsig = 1;
358	write (sigpipe [1], &gotsig, 1);	632	write (sigpipe [1], &signum, 1);
		633	errno = old_errno;
359	}	634	}
360	}	635	}
361		636
		637	void
		638	ev_feed_signal_event (EV_P_ int signum)
		639	{
		640	WL w;
		641
		642	#if EV_MULTIPLICITY
		643	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		644	#endif
		645
		646	--signum;
		647
		648	if (signum < 0 || signum >= signalmax)
		649	return;
		650
		651	signals [signum].gotsig = 0;
		652
		653	for (w = signals [signum].head; w; w = w->next)
		654	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		655	}
		656
362	static void	657	static void
363	sigcb (struct ev_io *iow, int revents)	658	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	659	{
365	struct ev_signal *w;
366	int sig;	660	int signum;
367		661
		662	read (sigpipe [0], &revents, 1);
368	gotsig = 0;	663	gotsig = 0;
369	read (sigpipe [0], &revents, 1);
370		664
371	for (sig = signalmax; sig--; )	665	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	666	if (signals [signum].gotsig)
373	{	667	ev_feed_signal_event (EV_A_ signum + 1);
374	signals [sig].gotsig = 0;
375
376	for (w = signals [sig].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);
378	}
379	}	668	}
380		669
381	static void	670	static void
382	siginit (void)	671	fd_intern (int fd)
383	{	672	{
		673	#ifdef _WIN32
		674	int arg = 1;
		675	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		676	#else
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	677	fcntl (fd, F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386
387	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	678	fcntl (fd, F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	679	#endif
		680	}
		681
		682	static void
		683	siginit (EV_P)
		684	{
		685	fd_intern (sigpipe [0]);
		686	fd_intern (sigpipe [1]);
390		687
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	688	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	689	ev_io_start (EV_A_ &sigev);
		690	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	691	}
394		692
395	/*****************************************************************************/	693	/*****************************************************************************/
396		694
397	static struct ev_idle **idles;
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407
408	static struct ev_child *childs [PID_HASHSIZE];	695	static struct ev_child *childs [PID_HASHSIZE];
		696
		697	#ifndef _WIN32
		698
409	static struct ev_signal childev;	699	static struct ev_signal childev;
410		700
411	#ifndef WCONTINUED	701	#ifndef WCONTINUED
412	# define WCONTINUED 0	702	# define WCONTINUED 0
413	#endif	703	#endif
414		704
415	static void	705	static void
416	childcb (struct ev_signal *sw, int revents)	706	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	707	{
418	struct ev_child *w;	708	struct ev_child *w;
		709
		710	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		711	if (w->pid == pid || !w->pid)
		712	{
		713	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		714	w->rpid = pid;
		715	w->rstatus = status;
		716	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		717	}
		718	}
		719
		720	static void
		721	childcb (EV_P_ struct ev_signal *sw, int revents)
		722	{
419	int pid, status;	723	int pid, status;
420		724
421	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	725	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	726	{
423	if (w->pid == pid || w->pid == -1)	727	/* make sure we are called again until all childs have been reaped */
424	{	728	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
425	w->status = status;	729
426	event ((W)w, EV_CHILD);	730	child_reap (EV_A_ sw, pid, pid, status);
427	}	731	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		732	}
428	}	733	}
		734
		735	#endif
429		736
430	/*****************************************************************************/	737	/*****************************************************************************/
431		738
		739	#if EV_USE_PORT
		740	# include "ev_port.c"
		741	#endif
		742	#if EV_USE_KQUEUE
		743	# include "ev_kqueue.c"
		744	#endif
432	#if EV_USE_EPOLL	745	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	746	# include "ev_epoll.c"
434	#endif	747	#endif
		748	#if EV_USE_POLL
		749	# include "ev_poll.c"
		750	#endif
435	#if EV_USE_SELECT	751	#if EV_USE_SELECT
436	# include "ev_select.c"	752	# include "ev_select.c"
437	#endif	753	#endif
438		754
439	int	755	int
…		…
446	ev_version_minor (void)	762	ev_version_minor (void)
447	{	763	{
448	return EV_VERSION_MINOR;	764	return EV_VERSION_MINOR;
449	}	765	}
450		766
451	int ev_init (int flags)	767	/* return true if we are running with elevated privileges and should ignore env variables */
		768	static int
		769	enable_secure (void)
452	{	770	{
		771	#ifdef _WIN32
		772	return 0;
		773	#else
		774	return getuid () != geteuid ()
		775	|| getgid () != getegid ();
		776	#endif
		777	}
		778
		779	unsigned int
		780	ev_method (EV_P)
		781	{
		782	return method;
		783	}
		784
		785	static void
		786	loop_init (EV_P_ unsigned int flags)
		787	{
453	if (!ev_method)	788	if (!method)
454	{	789	{
455	#if EV_USE_MONOTONIC	790	#if EV_USE_MONOTONIC
456	{	791	{
457	struct timespec ts;	792	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	793	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	794	have_monotonic = 1;
460	}	795	}
461	#endif	796	#endif
462		797
463	ev_now = ev_time ();	798	ev_rt_now = ev_time ();
464	now = get_clock ();	799	mn_now = get_clock ();
		800	now_floor = mn_now;
465	diff = ev_now - now;	801	rtmn_diff = ev_rt_now - mn_now;
466		802
467	if (pipe (sigpipe))	803	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
468	return 0;	804	flags = atoi (getenv ("LIBEV_FLAGS"));
469		805
470	ev_method = EVMETHOD_NONE;	806	if (!(flags & 0x0000ffff))
		807	flags |= 0x0000ffff;
		808
		809	method = 0;
		810	#if EV_USE_PORT
		811	if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);
		812	#endif
		813	#if EV_USE_KQUEUE
		814	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		815	#endif
471	#if EV_USE_EPOLL	816	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	817	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
		818	#endif
		819	#if EV_USE_POLL
		820	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
473	#endif	821	#endif
474	#if EV_USE_SELECT	822	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	823	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
476	#endif	824	#endif
477		825
		826	ev_init (&sigev, sigcb);
		827	ev_set_priority (&sigev, EV_MAXPRI);
		828	}
		829	}
		830
		831	static void
		832	loop_destroy (EV_P)
		833	{
		834	int i;
		835
		836	#if EV_USE_PORT
		837	if (method == EVMETHOD_PORT ) port_destroy (EV_A);
		838	#endif
		839	#if EV_USE_KQUEUE
		840	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		841	#endif
		842	#if EV_USE_EPOLL
		843	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		844	#endif
		845	#if EV_USE_POLL
		846	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		847	#endif
		848	#if EV_USE_SELECT
		849	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		850	#endif
		851
		852	for (i = NUMPRI; i--; )
		853	array_free (pending, [i]);
		854
		855	/* have to use the microsoft-never-gets-it-right macro */
		856	array_free (fdchange, EMPTY0);
		857	array_free (timer, EMPTY0);
		858	#if EV_PERIODICS
		859	array_free (periodic, EMPTY0);
		860	#endif
		861	array_free (idle, EMPTY0);
		862	array_free (prepare, EMPTY0);
		863	array_free (check, EMPTY0);
		864
		865	method = 0;
		866	}
		867
		868	static void
		869	loop_fork (EV_P)
		870	{
		871	#if EV_USE_PORT
		872	if (method == EVMETHOD_PORT ) port_fork (EV_A);
		873	#endif
		874	#if EV_USE_KQUEUE
		875	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		876	#endif
		877	#if EV_USE_EPOLL
		878	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		879	#endif
		880
		881	if (ev_is_active (&sigev))
		882	{
		883	/* default loop */
		884
		885	ev_ref (EV_A);
		886	ev_io_stop (EV_A_ &sigev);
		887	close (sigpipe [0]);
		888	close (sigpipe [1]);
		889
		890	while (pipe (sigpipe))
		891	syserr ("(libev) error creating pipe");
		892
		893	siginit (EV_A);
		894	}
		895
		896	postfork = 0;
		897	}
		898
		899	#if EV_MULTIPLICITY
		900	struct ev_loop *
		901	ev_loop_new (unsigned int flags)
		902	{
		903	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		904
		905	memset (loop, 0, sizeof (struct ev_loop));
		906
		907	loop_init (EV_A_ flags);
		908
		909	if (ev_method (EV_A))
		910	return loop;
		911
		912	return 0;
		913	}
		914
		915	void
		916	ev_loop_destroy (EV_P)
		917	{
		918	loop_destroy (EV_A);
		919	ev_free (loop);
		920	}
		921
		922	void
		923	ev_loop_fork (EV_P)
		924	{
		925	postfork = 1;
		926	}
		927
		928	#endif
		929
		930	#if EV_MULTIPLICITY
		931	struct ev_loop *
		932	ev_default_loop_init (unsigned int flags)
		933	#else
		934	int
		935	ev_default_loop (unsigned int flags)
		936	#endif
		937	{
		938	if (sigpipe [0] == sigpipe [1])
		939	if (pipe (sigpipe))
		940	return 0;
		941
		942	if (!ev_default_loop_ptr)
		943	{
		944	#if EV_MULTIPLICITY
		945	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		946	#else
		947	ev_default_loop_ptr = 1;
		948	#endif
		949
		950	loop_init (EV_A_ flags);
		951
478	if (ev_method)	952	if (ev_method (EV_A))
479	{	953	{
480	ev_watcher_init (&sigev, sigcb);
481	siginit ();	954	siginit (EV_A);
482		955
		956	#ifndef _WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	957	ev_signal_init (&childev, childcb, SIGCHLD);
		958	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	959	ev_signal_start (EV_A_ &childev);
		960	ev_unref (EV_A); /* child watcher should not keep loop alive */
		961	#endif
485	}	962	}
		963	else
		964	ev_default_loop_ptr = 0;
486	}	965	}
487		966
488	return ev_method;	967	return ev_default_loop_ptr;
		968	}
		969
		970	void
		971	ev_default_destroy (void)
		972	{
		973	#if EV_MULTIPLICITY
		974	struct ev_loop *loop = ev_default_loop_ptr;
		975	#endif
		976
		977	#ifndef _WIN32
		978	ev_ref (EV_A); /* child watcher */
		979	ev_signal_stop (EV_A_ &childev);
		980	#endif
		981
		982	ev_ref (EV_A); /* signal watcher */
		983	ev_io_stop (EV_A_ &sigev);
		984
		985	close (sigpipe [0]); sigpipe [0] = 0;
		986	close (sigpipe [1]); sigpipe [1] = 0;
		987
		988	loop_destroy (EV_A);
		989	}
		990
		991	void
		992	ev_default_fork (void)
		993	{
		994	#if EV_MULTIPLICITY
		995	struct ev_loop *loop = ev_default_loop_ptr;
		996	#endif
		997
		998	if (method)
		999	postfork = 1;
489	}	1000	}
490		1001
491	/*****************************************************************************/	1002	/*****************************************************************************/
492		1003
493	void
494	ev_prefork (void)
495	{
496	/* nop */
497	}
498
499	void
500	ev_postfork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_postfork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif
512
513	ev_io_stop (&sigev);
514	close (sigpipe [0]);
515	close (sigpipe [1]);
516	pipe (sigpipe);
517	siginit ();
518	}
519
520	/*****************************************************************************/
521
522	static void	1004	static int
		1005	any_pending (EV_P)
		1006	{
		1007	int pri;
		1008
		1009	for (pri = NUMPRI; pri--; )
		1010	if (pendingcnt [pri])
		1011	return 1;
		1012
		1013	return 0;
		1014	}
		1015
		1016	inline void
523	call_pending (void)	1017	call_pending (EV_P)
524	{	1018	{
		1019	int pri;
		1020
		1021	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	1022	while (pendingcnt [pri])
526	{	1023	{
527	ANPENDING *p = pendings + --pendingcnt;	1024	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		1025
529	if (p->w)	1026	if (expect_true (p->w))
530	{	1027	{
531	p->w->pending = 0;	1028	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	1029	EV_CB_INVOKE (p->w, p->events);
533	}	1030	}
534	}	1031	}
535	}	1032	}
536		1033
537	static void	1034	inline void
538	timers_reify (void)	1035	timers_reify (EV_P)
539	{	1036	{
540	while (timercnt && timers [0]->at <= now)	1037	while (timercnt && ((WT)timers [0])->at <= mn_now)
541	{	1038	{
542	struct ev_timer *w = timers [0];	1039	struct ev_timer *w = timers [0];
		1040
		1041	assert (("inactive timer on timer heap detected", ev_is_active (w)));
543		1042
544	/* first reschedule or stop timer */	1043	/* first reschedule or stop timer */
545	if (w->repeat)	1044	if (w->repeat)
546	{	1045	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1046	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1047
548	w->at = now + w->repeat;	1048	((WT)w)->at += w->repeat;
		1049	if (((WT)w)->at < mn_now)
		1050	((WT)w)->at = mn_now;
		1051
549	downheap ((WT *)timers, timercnt, 0);	1052	downheap ((WT *)timers, timercnt, 0);
550	}	1053	}
551	else	1054	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	1055	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		1056
554	event ((W)w, EV_TIMEOUT);	1057	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
555	}	1058	}
556	}	1059	}
557		1060
558	static void	1061	#if EV_PERIODICS
		1062	inline void
559	periodics_reify (void)	1063	periodics_reify (EV_P)
560	{	1064	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	1065	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
562	{	1066	{
563	struct ev_periodic *w = periodics [0];	1067	struct ev_periodic *w = periodics [0];
564		1068
		1069	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1070
565	/* first reschedule or stop timer */	1071	/* first reschedule or stop timer */
566	if (w->interval)	1072	if (w->reschedule_cb)
567	{	1073	{
		1074	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1075	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1076	downheap ((WT *)periodics, periodiccnt, 0);
		1077	}
		1078	else if (w->interval)
		1079	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1080	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1081	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	1082	downheap ((WT *)periodics, periodiccnt, 0);
571	}	1083	}
572	else	1084	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	1085	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		1086
575	event ((W)w, EV_PERIODIC);	1087	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
576	}	1088	}
577	}	1089	}
578		1090
579	static void	1091	static void
580	periodics_reschedule (ev_tstamp diff)	1092	periodics_reschedule (EV_P)
581	{	1093	{
582	int i;	1094	int i;
583		1095
584	/* adjust periodics after time jump */	1096	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	1097	for (i = 0; i < periodiccnt; ++i)
586	{	1098	{
587	struct ev_periodic *w = periodics [i];	1099	struct ev_periodic *w = periodics [i];
588		1100
		1101	if (w->reschedule_cb)
		1102	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
589	if (w->interval)	1103	else if (w->interval)
		1104	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1105	}
		1106
		1107	/* now rebuild the heap */
		1108	for (i = periodiccnt >> 1; i--; )
		1109	downheap ((WT *)periodics, periodiccnt, i);
		1110	}
		1111	#endif
		1112
		1113	inline int
		1114	time_update_monotonic (EV_P)
		1115	{
		1116	mn_now = get_clock ();
		1117
		1118	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1119	{
		1120	ev_rt_now = rtmn_diff + mn_now;
		1121	return 0;
		1122	}
		1123	else
		1124	{
		1125	now_floor = mn_now;
		1126	ev_rt_now = ev_time ();
		1127	return 1;
		1128	}
		1129	}
		1130
		1131	inline void
		1132	time_update (EV_P)
		1133	{
		1134	int i;
		1135
		1136	#if EV_USE_MONOTONIC
		1137	if (expect_true (have_monotonic))
		1138	{
		1139	if (time_update_monotonic (EV_A))
590	{	1140	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1141	ev_tstamp odiff = rtmn_diff;
592		1142
593	if (fabs (diff) >= 1e-4)	1143	for (i = 4; --i; ) /* loop a few times, before making important decisions */
594	{	1144	{
595	ev_periodic_stop (w);	1145	rtmn_diff = ev_rt_now - mn_now;
596	ev_periodic_start (w);
597		1146
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1147	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1148	return; /* all is well */
		1149
		1150	ev_rt_now = ev_time ();
		1151	mn_now = get_clock ();
		1152	now_floor = mn_now;
599	}	1153	}
		1154
		1155	# if EV_PERIODICS
		1156	periodics_reschedule (EV_A);
		1157	# endif
		1158	/* no timer adjustment, as the monotonic clock doesn't jump */
		1159	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
600	}	1160	}
601	}	1161	}
602	}	1162	else
603		1163	#endif
604	static void	1164	{
605	time_update (void)
606	{
607	int i;
608
609	ev_now = ev_time ();	1165	ev_rt_now = ev_time ();
610		1166
611	if (have_monotonic)	1167	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
612	{
613	ev_tstamp odiff = diff;
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	1168	{
617	now = get_clock ();	1169	#if EV_PERIODICS
618	diff = ev_now - now;
619
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)
621	return; /* all is well */
622
623	ev_now = ev_time ();
624	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}
629	else
630	{
631	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
632	{
633	periodics_reschedule (ev_now - now);	1170	periodics_reschedule (EV_A);
		1171	#endif
634		1172
635	/* adjust timers. this is easy, as the offset is the same for all */	1173	/* adjust timers. this is easy, as the offset is the same for all */
636	for (i = 0; i < timercnt; ++i)	1174	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	1175	((WT)timers [i])->at += ev_rt_now - mn_now;
638	}	1176	}
639		1177
640	now = ev_now;	1178	mn_now = ev_rt_now;
641	}	1179	}
642	}	1180	}
643		1181
644	int ev_loop_done;	1182	void
		1183	ev_ref (EV_P)
		1184	{
		1185	++activecnt;
		1186	}
645		1187
		1188	void
		1189	ev_unref (EV_P)
		1190	{
		1191	--activecnt;
		1192	}
		1193
		1194	static int loop_done;
		1195
		1196	void
646	void ev_loop (int flags)	1197	ev_loop (EV_P_ int flags)
647	{	1198	{
648	double block;	1199	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1200	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650		1201
651	do	1202	while (activecnt)
652	{	1203	{
653	/* queue check watchers (and execute them) */	1204	/* queue check watchers (and execute them) */
654	if (preparecnt)	1205	if (expect_false (preparecnt))
655	{	1206	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1207	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	1208	call_pending (EV_A);
658	}	1209	}
659		1210
		1211	/* we might have forked, so reify kernel state if necessary */
		1212	if (expect_false (postfork))
		1213	loop_fork (EV_A);
		1214
660	/* update fd-related kernel structures */	1215	/* update fd-related kernel structures */
661	fd_reify ();	1216	fd_reify (EV_A);
662		1217
663	/* calculate blocking time */	1218	/* calculate blocking time */
664		1219
665	/* we only need this for !monotonic clockor timers, but as we basically	1220	/* we only need this for !monotonic clock or timers, but as we basically
666	always have timers, we just calculate it always */	1221	always have timers, we just calculate it always */
		1222	#if EV_USE_MONOTONIC
		1223	if (expect_true (have_monotonic))
		1224	time_update_monotonic (EV_A);
		1225	else
		1226	#endif
		1227	{
667	ev_now = ev_time ();	1228	ev_rt_now = ev_time ();
		1229	mn_now = ev_rt_now;
		1230	}
668		1231
669	if (flags & EVLOOP_NONBLOCK || idlecnt)	1232	if (flags & EVLOOP_NONBLOCK || idlecnt)
670	block = 0.;	1233	block = 0.;
671	else	1234	else
672	{	1235	{
673	block = MAX_BLOCKTIME;	1236	block = MAX_BLOCKTIME;
674		1237
675	if (timercnt)	1238	if (timercnt)
676	{	1239	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1240	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
678	if (block > to) block = to;	1241	if (block > to) block = to;
679	}	1242	}
680		1243
		1244	#if EV_PERIODICS
681	if (periodiccnt)	1245	if (periodiccnt)
682	{	1246	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1247	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
684	if (block > to) block = to;	1248	if (block > to) block = to;
685	}	1249	}
		1250	#endif
686		1251
687	if (block < 0.) block = 0.;	1252	if (expect_false (block < 0.)) block = 0.;
688	}	1253	}
689		1254
690	method_poll (block);	1255	method_poll (EV_A_ block);
691		1256
692	/* update ev_now, do magic */	1257	/* update ev_rt_now, do magic */
693	time_update ();	1258	time_update (EV_A);
694		1259
695	/* queue pending timers and reschedule them */	1260	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1261	timers_reify (EV_A); /* relative timers called last */
		1262	#if EV_PERIODICS
697	periodics_reify (); /* absolute timers called first */	1263	periodics_reify (EV_A); /* absolute timers called first */
		1264	#endif
698		1265
699	/* queue idle watchers unless io or timers are pending */	1266	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	1267	if (idlecnt && !any_pending (EV_A))
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1268	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		1269
703	/* queue check watchers, to be executed first */	1270	/* queue check watchers, to be executed first */
704	if (checkcnt)	1271	if (expect_false (checkcnt))
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1272	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1273
707	call_pending ();	1274	call_pending (EV_A);
708	}
709	while (!ev_loop_done);
710		1275
		1276	if (expect_false (loop_done))
		1277	break;
		1278	}
		1279
711	if (ev_loop_done != 2)	1280	if (loop_done != 2)
712	ev_loop_done = 0;	1281	loop_done = 0;
		1282	}
		1283
		1284	void
		1285	ev_unloop (EV_P_ int how)
		1286	{
		1287	loop_done = how;
713	}	1288	}
714		1289
715	/*****************************************************************************/	1290	/*****************************************************************************/
716		1291
717	static void	1292	inline void
718	wlist_add (WL *head, WL elem)	1293	wlist_add (WL *head, WL elem)
719	{	1294	{
720	elem->next = *head;	1295	elem->next = *head;
721	*head = elem;	1296	*head = elem;
722	}	1297	}
723		1298
724	static void	1299	inline void
725	wlist_del (WL *head, WL elem)	1300	wlist_del (WL *head, WL elem)
726	{	1301	{
727	while (*head)	1302	while (*head)
728	{	1303	{
729	if (*head == elem)	1304	if (*head == elem)
…		…
734		1309
735	head = &(*head)->next;	1310	head = &(*head)->next;
736	}	1311	}
737	}	1312	}
738		1313
739	static void	1314	inline void
740	ev_clear_pending (W w)	1315	ev_clear_pending (EV_P_ W w)
741	{	1316	{
742	if (w->pending)	1317	if (w->pending)
743	{	1318	{
744	pendings [w->pending - 1].w = 0;	1319	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1320	w->pending = 0;
746	}	1321	}
747	}	1322	}
748		1323
749	static void	1324	inline void
750	ev_start (W w, int active)	1325	ev_start (EV_P_ W w, int active)
751	{	1326	{
		1327	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1328	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1329
752	w->active = active;	1330	w->active = active;
		1331	ev_ref (EV_A);
753	}	1332	}
754		1333
755	static void	1334	inline void
756	ev_stop (W w)	1335	ev_stop (EV_P_ W w)
757	{	1336	{
		1337	ev_unref (EV_A);
758	w->active = 0;	1338	w->active = 0;
759	}	1339	}
760		1340
761	/*****************************************************************************/	1341	/*****************************************************************************/
762		1342
763	void	1343	void
764	ev_io_start (struct ev_io *w)	1344	ev_io_start (EV_P_ struct ev_io *w)
765	{	1345	{
766	if (ev_is_active (w))
767	return;
768
769	int fd = w->fd;	1346	int fd = w->fd;
770		1347
		1348	if (expect_false (ev_is_active (w)))
		1349	return;
		1350
771	assert (("ev_io_start called with negative fd", fd >= 0));	1351	assert (("ev_io_start called with negative fd", fd >= 0));
772		1352
773	ev_start ((W)w, 1);	1353	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1354	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1355	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1356
777	fd_change (fd);	1357	fd_change (EV_A_ fd);
778	}	1358	}
779		1359
780	void	1360	void
781	ev_io_stop (struct ev_io *w)	1361	ev_io_stop (EV_P_ struct ev_io *w)
782	{	1362	{
783	ev_clear_pending ((W)w);	1363	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1364	if (expect_false (!ev_is_active (w)))
785	return;	1365	return;
		1366
		1367	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
786		1368
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1369	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1370	ev_stop (EV_A_ (W)w);
789		1371
790	fd_change (w->fd);	1372	fd_change (EV_A_ w->fd);
791	}	1373	}
792		1374
793	void	1375	void
794	ev_timer_start (struct ev_timer *w)	1376	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1377	{
796	if (ev_is_active (w))	1378	if (expect_false (ev_is_active (w)))
797	return;	1379	return;
798		1380
799	w->at += now;	1381	((WT)w)->at += mn_now;
800		1382
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1383	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1384
803	ev_start ((W)w, ++timercnt);	1385	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1386	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
805	timers [timercnt - 1] = w;	1387	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1388	upheap ((WT *)timers, timercnt - 1);
807	}
808		1389
		1390	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1391	}
		1392
809	void	1393	void
810	ev_timer_stop (struct ev_timer *w)	1394	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1395	{
812	ev_clear_pending ((W)w);	1396	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1397	if (expect_false (!ev_is_active (w)))
814	return;	1398	return;
815		1399
		1400	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1401
816	if (w->active < timercnt--)	1402	if (expect_true (((W)w)->active < timercnt--))
817	{	1403	{
818	timers [w->active - 1] = timers [timercnt];	1404	timers [((W)w)->active - 1] = timers [timercnt];
819	downheap ((WT *)timers, timercnt, w->active - 1);	1405	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1406	}
821		1407
822	w->at = w->repeat;	1408	((WT)w)->at -= mn_now;
823		1409
824	ev_stop ((W)w);	1410	ev_stop (EV_A_ (W)w);
825	}	1411	}
826		1412
827	void	1413	void
828	ev_timer_again (struct ev_timer *w)	1414	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1415	{
830	if (ev_is_active (w))	1416	if (ev_is_active (w))
831	{	1417	{
832	if (w->repeat)	1418	if (w->repeat)
833	{	1419	{
834	w->at = now + w->repeat;	1420	((WT)w)->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1421	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
836	}	1422	}
837	else	1423	else
838	ev_timer_stop (w);	1424	ev_timer_stop (EV_A_ w);
839	}	1425	}
840	else if (w->repeat)	1426	else if (w->repeat)
		1427	{
		1428	w->at = w->repeat;
841	ev_timer_start (w);	1429	ev_timer_start (EV_A_ w);
		1430	}
842	}	1431	}
843		1432
		1433	#if EV_PERIODICS
844	void	1434	void
845	ev_periodic_start (struct ev_periodic *w)	1435	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1436	{
847	if (ev_is_active (w))	1437	if (expect_false (ev_is_active (w)))
848	return;	1438	return;
849		1439
		1440	if (w->reschedule_cb)
		1441	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1442	else if (w->interval)
		1443	{
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1444	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1445	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1446	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1447	}
855		1448
856	ev_start ((W)w, ++periodiccnt);	1449	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1450	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
858	periodics [periodiccnt - 1] = w;	1451	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1452	upheap ((WT *)periodics, periodiccnt - 1);
860	}
861		1453
		1454	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1455	}
		1456
862	void	1457	void
863	ev_periodic_stop (struct ev_periodic *w)	1458	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1459	{
865	ev_clear_pending ((W)w);	1460	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1461	if (expect_false (!ev_is_active (w)))
867	return;	1462	return;
868		1463
		1464	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1465
869	if (w->active < periodiccnt--)	1466	if (expect_true (((W)w)->active < periodiccnt--))
870	{	1467	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1468	periodics [((W)w)->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1469	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
873	}	1470	}
874		1471
875	ev_stop ((W)w);	1472	ev_stop (EV_A_ (W)w);
876	}	1473	}
877		1474
878	void	1475	void
		1476	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1477	{
		1478	/* TODO: use adjustheap and recalculation */
		1479	ev_periodic_stop (EV_A_ w);
		1480	ev_periodic_start (EV_A_ w);
		1481	}
		1482	#endif
		1483
		1484	void
		1485	ev_idle_start (EV_P_ struct ev_idle *w)
		1486	{
		1487	if (expect_false (ev_is_active (w)))
		1488	return;
		1489
		1490	ev_start (EV_A_ (W)w, ++idlecnt);
		1491	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1492	idles [idlecnt - 1] = w;
		1493	}
		1494
		1495	void
		1496	ev_idle_stop (EV_P_ struct ev_idle *w)
		1497	{
		1498	ev_clear_pending (EV_A_ (W)w);
		1499	if (expect_false (!ev_is_active (w)))
		1500	return;
		1501
		1502	idles [((W)w)->active - 1] = idles [--idlecnt];
		1503	ev_stop (EV_A_ (W)w);
		1504	}
		1505
		1506	void
		1507	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1508	{
		1509	if (expect_false (ev_is_active (w)))
		1510	return;
		1511
		1512	ev_start (EV_A_ (W)w, ++preparecnt);
		1513	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1514	prepares [preparecnt - 1] = w;
		1515	}
		1516
		1517	void
		1518	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1519	{
		1520	ev_clear_pending (EV_A_ (W)w);
		1521	if (expect_false (!ev_is_active (w)))
		1522	return;
		1523
		1524	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1525	ev_stop (EV_A_ (W)w);
		1526	}
		1527
		1528	void
		1529	ev_check_start (EV_P_ struct ev_check *w)
		1530	{
		1531	if (expect_false (ev_is_active (w)))
		1532	return;
		1533
		1534	ev_start (EV_A_ (W)w, ++checkcnt);
		1535	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1536	checks [checkcnt - 1] = w;
		1537	}
		1538
		1539	void
		1540	ev_check_stop (EV_P_ struct ev_check *w)
		1541	{
		1542	ev_clear_pending (EV_A_ (W)w);
		1543	if (expect_false (!ev_is_active (w)))
		1544	return;
		1545
		1546	checks [((W)w)->active - 1] = checks [--checkcnt];
		1547	ev_stop (EV_A_ (W)w);
		1548	}
		1549
		1550	#ifndef SA_RESTART
		1551	# define SA_RESTART 0
		1552	#endif
		1553
		1554	void
879	ev_signal_start (struct ev_signal *w)	1555	ev_signal_start (EV_P_ struct ev_signal *w)
880	{	1556	{
		1557	#if EV_MULTIPLICITY
		1558	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1559	#endif
881	if (ev_is_active (w))	1560	if (expect_false (ev_is_active (w)))
882	return;	1561	return;
883		1562
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1563	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1564
886	ev_start ((W)w, 1);	1565	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1566	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1567	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1568
890	if (!w->next)	1569	if (!((WL)w)->next)
891	{	1570	{
		1571	#if _WIN32
		1572	signal (w->signum, sighandler);
		1573	#else
892	struct sigaction sa;	1574	struct sigaction sa;
893	sa.sa_handler = sighandler;	1575	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1576	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1577	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1578	sigaction (w->signum, &sa, 0);
		1579	#endif
897	}	1580	}
898	}	1581	}
899		1582
900	void	1583	void
901	ev_signal_stop (struct ev_signal *w)	1584	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1585	{
903	ev_clear_pending ((W)w);	1586	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1587	if (expect_false (!ev_is_active (w)))
905	return;	1588	return;
906		1589
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1590	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1591	ev_stop (EV_A_ (W)w);
909		1592
910	if (!signals [w->signum - 1].head)	1593	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1594	signal (w->signum, SIG_DFL);
912	}	1595	}
913		1596
914	void	1597	void
915	ev_idle_start (struct ev_idle *w)
916	{
917	if (ev_is_active (w))
918	return;
919
920	ev_start ((W)w, ++idlecnt);
921	array_needsize (idles, idlemax, idlecnt, );
922	idles [idlecnt - 1] = w;
923	}
924
925	void
926	ev_idle_stop (struct ev_idle *w)
927	{
928	ev_clear_pending ((W)w);
929	if (ev_is_active (w))
930	return;
931
932	idles [w->active - 1] = idles [--idlecnt];
933	ev_stop ((W)w);
934	}
935
936	void
937	ev_prepare_start (struct ev_prepare *w)
938	{
939	if (ev_is_active (w))
940	return;
941
942	ev_start ((W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );
944	prepares [preparecnt - 1] = w;
945	}
946
947	void
948	ev_prepare_stop (struct ev_prepare *w)
949	{
950	ev_clear_pending ((W)w);
951	if (ev_is_active (w))
952	return;
953
954	prepares [w->active - 1] = prepares [--preparecnt];
955	ev_stop ((W)w);
956	}
957
958	void
959	ev_check_start (struct ev_check *w)
960	{
961	if (ev_is_active (w))
962	return;
963
964	ev_start ((W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );
966	checks [checkcnt - 1] = w;
967	}
968
969	void
970	ev_check_stop (struct ev_check *w)
971	{
972	ev_clear_pending ((W)w);
973	if (ev_is_active (w))
974	return;
975
976	checks [w->active - 1] = checks [--checkcnt];
977	ev_stop ((W)w);
978	}
979
980	void
981	ev_child_start (struct ev_child *w)	1598	ev_child_start (EV_P_ struct ev_child *w)
982	{	1599	{
		1600	#if EV_MULTIPLICITY
		1601	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1602	#endif
983	if (ev_is_active (w))	1603	if (expect_false (ev_is_active (w)))
984	return;	1604	return;
985		1605
986	ev_start ((W)w, 1);	1606	ev_start (EV_A_ (W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1607	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}	1608	}
989		1609
990	void	1610	void
991	ev_child_stop (struct ev_child *w)	1611	ev_child_stop (EV_P_ struct ev_child *w)
992	{	1612	{
993	ev_clear_pending ((W)w);	1613	ev_clear_pending (EV_A_ (W)w);
994	if (ev_is_active (w))	1614	if (expect_false (!ev_is_active (w)))
995	return;	1615	return;
996		1616
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1617	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1618	ev_stop (EV_A_ (W)w);
999	}	1619	}
1000		1620
1001	/*****************************************************************************/	1621	/*****************************************************************************/
1002		1622
1003	struct ev_once	1623	struct ev_once
…		…
1007	void (*cb)(int revents, void *arg);	1627	void (*cb)(int revents, void *arg);
1008	void *arg;	1628	void *arg;
1009	};	1629	};
1010		1630
1011	static void	1631	static void
1012	once_cb (struct ev_once *once, int revents)	1632	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1633	{
1014	void (*cb)(int revents, void *arg) = once->cb;	1634	void (*cb)(int revents, void *arg) = once->cb;
1015	void *arg = once->arg;	1635	void *arg = once->arg;
1016		1636
1017	ev_io_stop (&once->io);	1637	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1638	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1639	ev_free (once);
1020		1640
1021	cb (revents, arg);	1641	cb (revents, arg);
1022	}	1642	}
1023		1643
1024	static void	1644	static void
1025	once_cb_io (struct ev_io *w, int revents)	1645	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1646	{
1027	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1647	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1028	}	1648	}
1029		1649
1030	static void	1650	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1651	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1652	{
1033	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1653	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1034	}	1654	}
1035		1655
1036	void	1656	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1657	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038	{	1658	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1659	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1040		1660
1041	if (!once)	1661	if (expect_false (!once))
		1662	{
1042	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1663	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1043	else	1664	return;
1044	{	1665	}
		1666
1045	once->cb = cb;	1667	once->cb = cb;
1046	once->arg = arg;	1668	once->arg = arg;
1047		1669
1048	ev_watcher_init (&once->io, once_cb_io);	1670	ev_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1671	if (fd >= 0)
1050	{	1672	{
1051	ev_io_set (&once->io, fd, events);	1673	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1674	ev_io_start (EV_A_ &once->io);
1053	}	1675	}
1054		1676
1055	ev_watcher_init (&once->to, once_cb_to);	1677	ev_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1678	if (timeout >= 0.)
1057	{	1679	{
1058	ev_timer_set (&once->to, timeout, 0.);	1680	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1681	ev_timer_start (EV_A_ &once->to);
1060	}
1061	}
1062	}
1063
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{	1682	}
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}	1683	}
1141		1684
		1685	#ifdef __cplusplus
		1686	}
1142	#endif	1687	#endif
1143		1688
1144
1145
1146

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