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Comparing libev/ev.c (file contents):
Revision 1.32 by root, Thu Nov 1 09:21:51 2007 UTC vs.
Revision 1.129 by root, Fri Nov 23 05:00:44 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	# ifndef EV_USE_SELECT
		56	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		57	# define EV_USE_SELECT 1
		58	# else
		59	# define EV_USE_SELECT 0
		60	# endif
		61	# endif
		62
		63	# ifndef EV_USE_POLL
		64	# if HAVE_POLL && HAVE_POLL_H
		65	# define EV_USE_POLL 1
		66	# else
		67	# define EV_USE_POLL 0
		68	# endif
		69	# endif
		70
		71	# ifndef EV_USE_EPOLL
		72	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		73	# define EV_USE_EPOLL 1
		74	# else
		75	# define EV_USE_EPOLL 0
		76	# endif
		77	# endif
		78
		79	# ifndef EV_USE_KQUEUE
		80	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		81	# define EV_USE_KQUEUE 1
		82	# else
		83	# define EV_USE_KQUEUE 0
		84	# endif
		85	# endif
		86
		87	# ifndef EV_USE_PORT
		88	# if HAVE_PORT_H && HAVE_PORT_CREATE
		89	# define EV_USE_PORT 1
		90	# else
		91	# define EV_USE_PORT 0
		92	# endif
		93	# endif
		94
31	#endif	95	#endif
32		96
33	#include <math.h>	97	#include <math.h>
34	#include <stdlib.h>	98	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	99	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	100	#include <stddef.h>
39		101
40	#include <stdio.h>	102	#include <stdio.h>
41		103
42	#include <assert.h>	104	#include <assert.h>
43	#include <errno.h>	105	#include <errno.h>
44	#include <sys/types.h>	106	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	107	#include <time.h>
48		108
		109	#include <signal.h>
		110
		111	#ifndef _WIN32
		112	# include <unistd.h>
		113	# include <sys/time.h>
		114	# include <sys/wait.h>
		115	#else
		116	# define WIN32_LEAN_AND_MEAN
		117	# include <windows.h>
		118	# ifndef EV_SELECT_IS_WINSOCKET
		119	# define EV_SELECT_IS_WINSOCKET 1
		120	# endif
		121	#endif
		122
		123	/**/
		124
49	#ifndef EV_USE_MONOTONIC	125	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	126	# define EV_USE_MONOTONIC 0
52	# endif	127	#endif
		128
		129	#ifndef EV_USE_REALTIME
		130	# define EV_USE_REALTIME 0
53	#endif	131	#endif
54		132
55	#ifndef EV_USE_SELECT	133	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	134	# define EV_USE_SELECT 1
57	#endif	135	#endif
58		136
		137	#ifndef EV_USE_POLL
		138	# ifdef _WIN32
		139	# define EV_USE_POLL 0
		140	# else
		141	# define EV_USE_POLL 1
		142	# endif
		143	#endif
		144
59	#ifndef EV_USE_EPOLL	145	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	146	# define EV_USE_EPOLL 0
61	#endif	147	#endif
62		148
		149	#ifndef EV_USE_KQUEUE
		150	# define EV_USE_KQUEUE 0
		151	#endif
		152
		153	#ifndef EV_USE_PORT
		154	# define EV_USE_PORT 0
		155	#endif
		156
		157	/**/
		158
		159	#ifndef CLOCK_MONOTONIC
		160	# undef EV_USE_MONOTONIC
		161	# define EV_USE_MONOTONIC 0
		162	#endif
		163
63	#ifndef CLOCK_REALTIME	164	#ifndef CLOCK_REALTIME
		165	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	166	# define EV_USE_REALTIME 0
65	#endif	167	#endif
66	#ifndef EV_USE_REALTIME	168
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	169	#if EV_SELECT_IS_WINSOCKET
		170	# include <winsock.h>
68	#endif	171	#endif
		172
		173	/**/
69		174
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	175	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	176	#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 */	177	#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 */	178	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
74		179
		180	#ifdef EV_H
		181	# include EV_H
		182	#else
75	#include "ev.h"	183	# include "ev.h"
		184	#endif
		185
		186	#if __GNUC__ >= 3
		187	# define expect(expr,value) __builtin_expect ((expr),(value))
		188	# define inline static inline
		189	#else
		190	# define expect(expr,value) (expr)
		191	# define inline static
		192	#endif
		193
		194	#define expect_false(expr) expect ((expr) != 0, 0)
		195	#define expect_true(expr) expect ((expr) != 0, 1)
		196
		197	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		198	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		199
		200	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		201	#define EMPTY2(a,b) /* used to suppress some warnings */
76		202
77	typedef struct ev_watcher *W;	203	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	204	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	205	typedef struct ev_watcher_time *WT;
80		206
81	static ev_tstamp now, diff; /* monotonic clock */	207	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		208
		209	#ifdef _WIN32
		210	# include "ev_win32.c"
		211	#endif
		212
		213	/*****************************************************************************/
		214
		215	static void (*syserr_cb)(const char *msg);
		216
		217	void ev_set_syserr_cb (void (*cb)(const char *msg))
		218	{
		219	syserr_cb = cb;
		220	}
		221
		222	static void
		223	syserr (const char *msg)
		224	{
		225	if (!msg)
		226	msg = "(libev) system error";
		227
		228	if (syserr_cb)
		229	syserr_cb (msg);
		230	else
		231	{
		232	perror (msg);
		233	abort ();
		234	}
		235	}
		236
		237	static void *(*alloc)(void *ptr, long size);
		238
		239	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		240	{
		241	alloc = cb;
		242	}
		243
		244	static void *
		245	ev_realloc (void *ptr, long size)
		246	{
		247	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		248
		249	if (!ptr && size)
		250	{
		251	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		252	abort ();
		253	}
		254
		255	return ptr;
		256	}
		257
		258	#define ev_malloc(size) ev_realloc (0, (size))
		259	#define ev_free(ptr) ev_realloc ((ptr), 0)
		260
		261	/*****************************************************************************/
		262
		263	typedef struct
		264	{
		265	WL head;
		266	unsigned char events;
		267	unsigned char reify;
		268	#if EV_SELECT_IS_WINSOCKET
		269	SOCKET handle;
		270	#endif
		271	} ANFD;
		272
		273	typedef struct
		274	{
		275	W w;
		276	int events;
		277	} ANPENDING;
		278
		279	#if EV_MULTIPLICITY
		280
		281	struct ev_loop
		282	{
		283	ev_tstamp ev_rt_now;
		284	#define ev_rt_now ((loop)->ev_rt_now)
		285	#define VAR(name,decl) decl;
		286	#include "ev_vars.h"
		287	#undef VAR
		288	};
		289	#include "ev_wrap.h"
		290
		291	static struct ev_loop default_loop_struct;
		292	struct ev_loop *ev_default_loop_ptr;
		293
		294	#else
		295
82	ev_tstamp ev_now;	296	ev_tstamp ev_rt_now;
83	int ev_method;	297	#define VAR(name,decl) static decl;
		298	#include "ev_vars.h"
		299	#undef VAR
84		300
85	static int have_monotonic; /* runtime */	301	static int ev_default_loop_ptr;
86		302
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	303	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		304
91	/*****************************************************************************/	305	/*****************************************************************************/
92		306
93	ev_tstamp	307	ev_tstamp
94	ev_time (void)	308	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	316	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	317	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	318	#endif
105	}	319	}
106		320
107	static ev_tstamp	321	inline ev_tstamp
108	get_clock (void)	322	get_clock (void)
109	{	323	{
110	#if EV_USE_MONOTONIC	324	#if EV_USE_MONOTONIC
111	if (have_monotonic)	325	if (expect_true (have_monotonic))
112	{	326	{
113	struct timespec ts;	327	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	328	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	329	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	330	}
117	#endif	331	#endif
118		332
119	return ev_time ();	333	return ev_time ();
120	}	334	}
121		335
		336	#if EV_MULTIPLICITY
		337	ev_tstamp
		338	ev_now (EV_P)
		339	{
		340	return ev_rt_now;
		341	}
		342	#endif
		343
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	344	#define array_roundsize(type,n) (((n) | 4) & ~3)
123		345
124	#define array_needsize(base,cur,cnt,init) \	346	#define array_needsize(type,base,cur,cnt,init) \
125	if ((cnt) > cur) \	347	if (expect_false ((cnt) > cur)) \
126	{ \	348	{ \
127	int newcnt = cur; \	349	int newcnt = cur; \
128	do \	350	do \
129	{ \	351	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	352	newcnt = array_roundsize (type, newcnt << 1); \
131	} \	353	} \
132	while ((cnt) > newcnt); \	354	while ((cnt) > newcnt); \
133	\	355	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \	356	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
135	init (base + cur, newcnt - cur); \	357	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	358	cur = newcnt; \
137	}	359	}
		360
		361	#define array_slim(type,stem) \
		362	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		363	{ \
		364	stem ## max = array_roundsize (stem ## cnt >> 1); \
		365	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		366	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		367	}
		368
		369	#define array_free(stem, idx) \
		370	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
138		371
139	/*****************************************************************************/	372	/*****************************************************************************/
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		373
150	static void	374	static void
151	anfds_init (ANFD *base, int count)	375	anfds_init (ANFD *base, int count)
152	{	376	{
153	while (count--)	377	while (count--)
154	{	378	{
155	base->head = 0;	379	base->head = 0;
156	base->events = EV_NONE;	380	base->events = EV_NONE;
		381	base->reify = 0;
		382
157	++base;	383	++base;
158	}	384	}
159	}	385	}
160		386
161	typedef struct	387	void
		388	ev_feed_event (EV_P_ void *w, int revents)
162	{	389	{
163	W w;	390	W w_ = (W)w;
164	int events;
165	} ANPENDING;
166		391
167	static ANPENDING *pendings;	392	if (expect_false (w_->pending))
168	static int pendingmax, pendingcnt;
169
170	static void
171	event (W w, int events)
172	{
173	if (w->pending)
174	{	393	{
175	pendings [w->pending - 1].events |= events;	394	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
176	return;	395	return;
177	}	396	}
178		397
179	w->pending = ++pendingcnt;	398	w_->pending = ++pendingcnt [ABSPRI (w_)];
180	array_needsize (pendings, pendingmax, pendingcnt, );	399	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
181	pendings [pendingcnt - 1].w = w;	400	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
182	pendings [pendingcnt - 1].events = events;	401	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
183	}	402	}
184		403
185	static void	404	static void
186	queue_events (W *events, int eventcnt, int type)	405	queue_events (EV_P_ W *events, int eventcnt, int type)
187	{	406	{
188	int i;	407	int i;
189		408
190	for (i = 0; i < eventcnt; ++i)	409	for (i = 0; i < eventcnt; ++i)
191	event (events [i], type);	410	ev_feed_event (EV_A_ events [i], type);
192	}	411	}
193		412
194	static void	413	inline void
195	fd_event (int fd, int events)	414	fd_event (EV_P_ int fd, int revents)
196	{	415	{
197	ANFD *anfd = anfds + fd;	416	ANFD *anfd = anfds + fd;
198	struct ev_io *w;	417	struct ev_io *w;
199		418
200	for (w = anfd->head; w; w = w->next)	419	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
201	{	420	{
202	int ev = w->events & events;	421	int ev = w->events & revents;
203		422
204	if (ev)	423	if (ev)
205	event ((W)w, ev);	424	ev_feed_event (EV_A_ (W)w, ev);
206	}	425	}
		426	}
		427
		428	void
		429	ev_feed_fd_event (EV_P_ int fd, int revents)
		430	{
		431	fd_event (EV_A_ fd, revents);
207	}	432	}
208		433
209	/*****************************************************************************/	434	/*****************************************************************************/
210		435
211	static int *fdchanges;	436	inline void
212	static int fdchangemax, fdchangecnt;	437	fd_reify (EV_P)
213
214	static void
215	fd_reify (void)
216	{	438	{
217	int i;	439	int i;
218		440
219	for (i = 0; i < fdchangecnt; ++i)	441	for (i = 0; i < fdchangecnt; ++i)
220	{	442	{
…		…
222	ANFD *anfd = anfds + fd;	444	ANFD *anfd = anfds + fd;
223	struct ev_io *w;	445	struct ev_io *w;
224		446
225	int events = 0;	447	int events = 0;
226		448
227	for (w = anfd->head; w; w = w->next)	449	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
228	events |= w->events;	450	events |= w->events;
229		451
230	anfd->events &= ~EV_REIFY;	452	#if EV_SELECT_IS_WINSOCKET
231		453	if (events)
232	if (anfd->events != events)
233	{	454	{
234	method_modify (fd, anfd->events, events);	455	unsigned long argp;
235	anfd->events = events;	456	anfd->handle = _get_osfhandle (fd);
		457	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
236	}	458	}
		459	#endif
		460
		461	anfd->reify = 0;
		462
		463	method_modify (EV_A_ fd, anfd->events, events);
		464	anfd->events = events;
237	}	465	}
238		466
239	fdchangecnt = 0;	467	fdchangecnt = 0;
240	}	468	}
241		469
242	static void	470	static void
243	fd_change (int fd)	471	fd_change (EV_P_ int fd)
244	{	472	{
245	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	473	if (expect_false (anfds [fd].reify))
246	return;	474	return;
247		475
248	anfds [fd].events |= EV_REIFY;	476	anfds [fd].reify = 1;
249		477
250	++fdchangecnt;	478	++fdchangecnt;
251	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	479	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
252	fdchanges [fdchangecnt - 1] = fd;	480	fdchanges [fdchangecnt - 1] = fd;
253	}	481	}
254		482
		483	static void
		484	fd_kill (EV_P_ int fd)
		485	{
		486	struct ev_io *w;
		487
		488	while ((w = (struct ev_io *)anfds [fd].head))
		489	{
		490	ev_io_stop (EV_A_ w);
		491	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		492	}
		493	}
		494
		495	inline int
		496	fd_valid (int fd)
		497	{
		498	#ifdef _WIN32
		499	return _get_osfhandle (fd) != -1;
		500	#else
		501	return fcntl (fd, F_GETFD) != -1;
		502	#endif
		503	}
		504
255	/* called on EBADF to verify fds */	505	/* called on EBADF to verify fds */
256	static void	506	static void
257	fd_recheck (void)	507	fd_ebadf (EV_P)
258	{	508	{
259	int fd;	509	int fd;
260		510
261	for (fd = 0; fd < anfdmax; ++fd)	511	for (fd = 0; fd < anfdmax; ++fd)
262	if (anfds [fd].events)	512	if (anfds [fd].events)
263	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	513	if (!fd_valid (fd) == -1 && errno == EBADF)
264	while (anfds [fd].head)	514	fd_kill (EV_A_ fd);
		515	}
		516
		517	/* called on ENOMEM in select/poll to kill some fds and retry */
		518	static void
		519	fd_enomem (EV_P)
		520	{
		521	int fd;
		522
		523	for (fd = anfdmax; fd--; )
		524	if (anfds [fd].events)
265	{	525	{
266	ev_io_stop (anfds [fd].head);	526	fd_kill (EV_A_ fd);
267	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	527	return;
268	}	528	}
		529	}
		530
		531	/* usually called after fork if method needs to re-arm all fds from scratch */
		532	static void
		533	fd_rearm_all (EV_P)
		534	{
		535	int fd;
		536
		537	/* this should be highly optimised to not do anything but set a flag */
		538	for (fd = 0; fd < anfdmax; ++fd)
		539	if (anfds [fd].events)
		540	{
		541	anfds [fd].events = 0;
		542	fd_change (EV_A_ fd);
		543	}
269	}	544	}
270		545
271	/*****************************************************************************/	546	/*****************************************************************************/
272		547
273	static struct ev_timer **timers;
274	static int timermax, timercnt;
275
276	static struct ev_periodic **periodics;
277	static int periodicmax, periodiccnt;
278
279	static void	548	static void
280	upheap (WT *timers, int k)	549	upheap (WT *heap, int k)
281	{	550	{
282	WT w = timers [k];	551	WT w = heap [k];
283		552
284	while (k && timers [k >> 1]->at > w->at)	553	while (k && heap [k >> 1]->at > w->at)
285	{	554	{
286	timers [k] = timers [k >> 1];	555	heap [k] = heap [k >> 1];
287	timers [k]->active = k + 1;	556	((W)heap [k])->active = k + 1;
288	k >>= 1;	557	k >>= 1;
289	}	558	}
290		559
291	timers [k] = w;	560	heap [k] = w;
292	timers [k]->active = k + 1;	561	((W)heap [k])->active = k + 1;
293		562
294	}	563	}
295		564
296	static void	565	static void
297	downheap (WT *timers, int N, int k)	566	downheap (WT *heap, int N, int k)
298	{	567	{
299	WT w = timers [k];	568	WT w = heap [k];
300		569
301	while (k < (N >> 1))	570	while (k < (N >> 1))
302	{	571	{
303	int j = k << 1;	572	int j = k << 1;
304		573
305	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	574	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
306	++j;	575	++j;
307		576
308	if (w->at <= timers [j]->at)	577	if (w->at <= heap [j]->at)
309	break;	578	break;
310		579
311	timers [k] = timers [j];	580	heap [k] = heap [j];
312	timers [k]->active = k + 1;	581	((W)heap [k])->active = k + 1;
313	k = j;	582	k = j;
314	}	583	}
315		584
316	timers [k] = w;	585	heap [k] = w;
317	timers [k]->active = k + 1;	586	((W)heap [k])->active = k + 1;
		587	}
		588
		589	inline void
		590	adjustheap (WT *heap, int N, int k)
		591	{
		592	upheap (heap, k);
		593	downheap (heap, N, k);
318	}	594	}
319		595
320	/*****************************************************************************/	596	/*****************************************************************************/
321		597
322	typedef struct	598	typedef struct
323	{	599	{
324	struct ev_signal *head;	600	WL head;
325	sig_atomic_t gotsig;	601	sig_atomic_t volatile gotsig;
326	} ANSIG;	602	} ANSIG;
327		603
328	static ANSIG *signals;	604	static ANSIG *signals;
329	static int signalmax;	605	static int signalmax;
330		606
331	static int sigpipe [2];	607	static int sigpipe [2];
332	static sig_atomic_t gotsig;	608	static sig_atomic_t volatile gotsig;
333	static struct ev_io sigev;	609	static struct ev_io sigev;
334		610
335	static void	611	static void
336	signals_init (ANSIG *base, int count)	612	signals_init (ANSIG *base, int count)
337	{	613	{
338	while (count--)	614	while (count--)
339	{	615	{
340	base->head = 0;	616	base->head = 0;
341	base->gotsig = 0;	617	base->gotsig = 0;
		618
342	++base;	619	++base;
343	}	620	}
344	}	621	}
345		622
346	static void	623	static void
347	sighandler (int signum)	624	sighandler (int signum)
348	{	625	{
		626	#if _WIN32
		627	signal (signum, sighandler);
		628	#endif
		629
349	signals [signum - 1].gotsig = 1;	630	signals [signum - 1].gotsig = 1;
350		631
351	if (!gotsig)	632	if (!gotsig)
352	{	633	{
		634	int old_errno = errno;
353	gotsig = 1;	635	gotsig = 1;
354	write (sigpipe [1], &gotsig, 1);	636	write (sigpipe [1], &signum, 1);
		637	errno = old_errno;
355	}	638	}
356	}	639	}
357		640
		641	void
		642	ev_feed_signal_event (EV_P_ int signum)
		643	{
		644	WL w;
		645
		646	#if EV_MULTIPLICITY
		647	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		648	#endif
		649
		650	--signum;
		651
		652	if (signum < 0 || signum >= signalmax)
		653	return;
		654
		655	signals [signum].gotsig = 0;
		656
		657	for (w = signals [signum].head; w; w = w->next)
		658	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		659	}
		660
358	static void	661	static void
359	sigcb (struct ev_io *iow, int revents)	662	sigcb (EV_P_ struct ev_io *iow, int revents)
360	{	663	{
361	struct ev_signal *w;
362	int sig;	664	int signum;
363		665
		666	read (sigpipe [0], &revents, 1);
364	gotsig = 0;	667	gotsig = 0;
365	read (sigpipe [0], &revents, 1);
366		668
367	for (sig = signalmax; sig--; )	669	for (signum = signalmax; signum--; )
368	if (signals [sig].gotsig)	670	if (signals [signum].gotsig)
369	{	671	ev_feed_signal_event (EV_A_ signum + 1);
370	signals [sig].gotsig = 0;
371
372	for (w = signals [sig].head; w; w = w->next)
373	event ((W)w, EV_SIGNAL);
374	}
375	}	672	}
376		673
377	static void	674	static void
378	siginit (void)	675	fd_intern (int fd)
379	{	676	{
		677	#ifdef _WIN32
		678	int arg = 1;
		679	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		680	#else
380	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	681	fcntl (fd, F_SETFD, FD_CLOEXEC);
381	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
382
383	/* rather than sort out wether we really need nb, set it */
384	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	682	fcntl (fd, F_SETFL, O_NONBLOCK);
385	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	683	#endif
		684	}
		685
		686	static void
		687	siginit (EV_P)
		688	{
		689	fd_intern (sigpipe [0]);
		690	fd_intern (sigpipe [1]);
386		691
387	ev_io_set (&sigev, sigpipe [0], EV_READ);	692	ev_io_set (&sigev, sigpipe [0], EV_READ);
388	ev_io_start (&sigev);	693	ev_io_start (EV_A_ &sigev);
		694	ev_unref (EV_A); /* child watcher should not keep loop alive */
389	}	695	}
390		696
391	/*****************************************************************************/	697	/*****************************************************************************/
392		698
393	static struct ev_idle **idles;
394	static int idlemax, idlecnt;
395
396	static struct ev_prepare **prepares;
397	static int preparemax, preparecnt;
398
399	static struct ev_check **checks;
400	static int checkmax, checkcnt;
401
402	/*****************************************************************************/
403
404	static struct ev_child *childs [PID_HASHSIZE];	699	static struct ev_child *childs [PID_HASHSIZE];
		700
		701	#ifndef _WIN32
		702
405	static struct ev_signal childev;	703	static struct ev_signal childev;
406		704
407	#ifndef WCONTINUED	705	#ifndef WCONTINUED
408	# define WCONTINUED 0	706	# define WCONTINUED 0
409	#endif	707	#endif
410		708
411	static void	709	static void
412	childcb (struct ev_signal *sw, int revents)	710	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
413	{	711	{
414	struct ev_child *w;	712	struct ev_child *w;
		713
		714	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		715	if (w->pid == pid || !w->pid)
		716	{
		717	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		718	w->rpid = pid;
		719	w->rstatus = status;
		720	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		721	}
		722	}
		723
		724	static void
		725	childcb (EV_P_ struct ev_signal *sw, int revents)
		726	{
415	int pid, status;	727	int pid, status;
416		728
417	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	729	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
418	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	730	{
419	if (w->pid == pid || w->pid == -1)	731	/* make sure we are called again until all childs have been reaped */
420	{	732	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
421	w->status = status;	733
422	event ((W)w, EV_CHILD);	734	child_reap (EV_A_ sw, pid, pid, status);
423	}	735	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		736	}
424	}	737	}
		738
		739	#endif
425		740
426	/*****************************************************************************/	741	/*****************************************************************************/
427		742
		743	#if EV_USE_PORT
		744	# include "ev_port.c"
		745	#endif
		746	#if EV_USE_KQUEUE
		747	# include "ev_kqueue.c"
		748	#endif
428	#if EV_USE_EPOLL	749	#if EV_USE_EPOLL
429	# include "ev_epoll.c"	750	# include "ev_epoll.c"
430	#endif	751	#endif
		752	#if EV_USE_POLL
		753	# include "ev_poll.c"
		754	#endif
431	#if EV_USE_SELECT	755	#if EV_USE_SELECT
432	# include "ev_select.c"	756	# include "ev_select.c"
433	#endif	757	#endif
434		758
435	int	759	int
…		…
442	ev_version_minor (void)	766	ev_version_minor (void)
443	{	767	{
444	return EV_VERSION_MINOR;	768	return EV_VERSION_MINOR;
445	}	769	}
446		770
447	int ev_init (int flags)	771	/* return true if we are running with elevated privileges and should ignore env variables */
		772	static int
		773	enable_secure (void)
448	{	774	{
		775	#ifdef _WIN32
		776	return 0;
		777	#else
		778	return getuid () != geteuid ()
		779	|| getgid () != getegid ();
		780	#endif
		781	}
		782
		783	unsigned int
		784	ev_supported_backends (void)
		785	{
		786	}
		787
		788	unsigned int
		789	ev_recommended_backends (void)
		790	{
		791	unsigned int flags;
		792
		793	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		794	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		795	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		796	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		797	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		798
		799	return flags;
		800	}
		801
		802	unsigned int
		803	ev_backend (EV_P)
		804	{
		805	unsigned int flags = ev_recommended_backends ();
		806
		807	#ifndef __NetBSD__
		808	/* kqueue is borked on everything but netbsd apparently */
		809	/* it usually doesn't work correctly on anything but sockets and pipes */
		810	flags &= ~EVBACKEND_KQUEUE;
		811	#endif
		812	#ifdef __APPLE__
		813	// flags &= ~EVBACKEND_KQUEUE; for documentation
		814	flags &= ~EVBACKEND_POLL;
		815	#endif
		816
		817	return flags;
		818	}
		819
		820	static void
		821	loop_init (EV_P_ unsigned int flags)
		822	{
449	if (!ev_method)	823	if (!method)
450	{	824	{
451	#if EV_USE_MONOTONIC	825	#if EV_USE_MONOTONIC
452	{	826	{
453	struct timespec ts;	827	struct timespec ts;
454	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	828	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
455	have_monotonic = 1;	829	have_monotonic = 1;
456	}	830	}
457	#endif	831	#endif
458		832
459	ev_now = ev_time ();	833	ev_rt_now = ev_time ();
460	now = get_clock ();	834	mn_now = get_clock ();
		835	now_floor = mn_now;
461	diff = ev_now - now;	836	rtmn_diff = ev_rt_now - mn_now;
462		837
463	if (pipe (sigpipe))	838	if (!(flags & EVFLAG_NOENV)
464	return 0;	839	&& !enable_secure ()
		840	&& getenv ("LIBEV_FLAGS"))
		841	flags = atoi (getenv ("LIBEV_FLAGS"));
465		842
466	ev_method = EVMETHOD_NONE;	843	if (!(flags & 0x0000ffffUL))
		844	flags |= ev_recommended_backends ();
		845
		846	method = 0;
		847	#if EV_USE_PORT
		848	if (!method && (flags & EVBACKEND_PORT )) method = port_init (EV_A_ flags);
		849	#endif
		850	#if EV_USE_KQUEUE
		851	if (!method && (flags & EVBACKEND_KQUEUE)) method = kqueue_init (EV_A_ flags);
		852	#endif
467	#if EV_USE_EPOLL	853	#if EV_USE_EPOLL
468	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	854	if (!method && (flags & EVBACKEND_EPOLL )) method = epoll_init (EV_A_ flags);
		855	#endif
		856	#if EV_USE_POLL
		857	if (!method && (flags & EVBACKEND_POLL )) method = poll_init (EV_A_ flags);
469	#endif	858	#endif
470	#if EV_USE_SELECT	859	#if EV_USE_SELECT
471	if (ev_method == EVMETHOD_NONE) select_init (flags);	860	if (!method && (flags & EVBACKEND_SELECT)) method = select_init (EV_A_ flags);
472	#endif	861	#endif
473		862
		863	ev_init (&sigev, sigcb);
		864	ev_set_priority (&sigev, EV_MAXPRI);
		865	}
		866	}
		867
		868	static void
		869	loop_destroy (EV_P)
		870	{
		871	int i;
		872
		873	#if EV_USE_PORT
		874	if (method == EVBACKEND_PORT ) port_destroy (EV_A);
		875	#endif
		876	#if EV_USE_KQUEUE
		877	if (method == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		878	#endif
		879	#if EV_USE_EPOLL
		880	if (method == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		881	#endif
		882	#if EV_USE_POLL
		883	if (method == EVBACKEND_POLL ) poll_destroy (EV_A);
		884	#endif
		885	#if EV_USE_SELECT
		886	if (method == EVBACKEND_SELECT) select_destroy (EV_A);
		887	#endif
		888
		889	for (i = NUMPRI; i--; )
		890	array_free (pending, [i]);
		891
		892	/* have to use the microsoft-never-gets-it-right macro */
		893	array_free (fdchange, EMPTY0);
		894	array_free (timer, EMPTY0);
		895	#if EV_PERIODICS
		896	array_free (periodic, EMPTY0);
		897	#endif
		898	array_free (idle, EMPTY0);
		899	array_free (prepare, EMPTY0);
		900	array_free (check, EMPTY0);
		901
		902	method = 0;
		903	}
		904
		905	static void
		906	loop_fork (EV_P)
		907	{
		908	#if EV_USE_PORT
		909	if (method == EVBACKEND_PORT ) port_fork (EV_A);
		910	#endif
		911	#if EV_USE_KQUEUE
		912	if (method == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		913	#endif
		914	#if EV_USE_EPOLL
		915	if (method == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		916	#endif
		917
		918	if (ev_is_active (&sigev))
		919	{
		920	/* default loop */
		921
		922	ev_ref (EV_A);
		923	ev_io_stop (EV_A_ &sigev);
		924	close (sigpipe [0]);
		925	close (sigpipe [1]);
		926
		927	while (pipe (sigpipe))
		928	syserr ("(libev) error creating pipe");
		929
		930	siginit (EV_A);
		931	}
		932
		933	postfork = 0;
		934	}
		935
		936	#if EV_MULTIPLICITY
		937	struct ev_loop *
		938	ev_loop_new (unsigned int flags)
		939	{
		940	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		941
		942	memset (loop, 0, sizeof (struct ev_loop));
		943
		944	loop_init (EV_A_ flags);
		945
		946	if (ev_method (EV_A))
		947	return loop;
		948
		949	return 0;
		950	}
		951
		952	void
		953	ev_loop_destroy (EV_P)
		954	{
		955	loop_destroy (EV_A);
		956	ev_free (loop);
		957	}
		958
		959	void
		960	ev_loop_fork (EV_P)
		961	{
		962	postfork = 1;
		963	}
		964
		965	#endif
		966
		967	#if EV_MULTIPLICITY
		968	struct ev_loop *
		969	ev_default_loop_init (unsigned int flags)
		970	#else
		971	int
		972	ev_default_loop (unsigned int flags)
		973	#endif
		974	{
		975	if (sigpipe [0] == sigpipe [1])
		976	if (pipe (sigpipe))
		977	return 0;
		978
		979	if (!ev_default_loop_ptr)
		980	{
		981	#if EV_MULTIPLICITY
		982	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		983	#else
		984	ev_default_loop_ptr = 1;
		985	#endif
		986
		987	loop_init (EV_A_ flags);
		988
474	if (ev_method)	989	if (ev_method (EV_A))
475	{	990	{
476	ev_watcher_init (&sigev, sigcb);
477	siginit ();	991	siginit (EV_A);
478		992
		993	#ifndef _WIN32
479	ev_signal_init (&childev, childcb, SIGCHLD);	994	ev_signal_init (&childev, childcb, SIGCHLD);
		995	ev_set_priority (&childev, EV_MAXPRI);
480	ev_signal_start (&childev);	996	ev_signal_start (EV_A_ &childev);
		997	ev_unref (EV_A); /* child watcher should not keep loop alive */
		998	#endif
481	}	999	}
		1000	else
		1001	ev_default_loop_ptr = 0;
482	}	1002	}
483		1003
484	return ev_method;	1004	return ev_default_loop_ptr;
		1005	}
		1006
		1007	void
		1008	ev_default_destroy (void)
		1009	{
		1010	#if EV_MULTIPLICITY
		1011	struct ev_loop *loop = ev_default_loop_ptr;
		1012	#endif
		1013
		1014	#ifndef _WIN32
		1015	ev_ref (EV_A); /* child watcher */
		1016	ev_signal_stop (EV_A_ &childev);
		1017	#endif
		1018
		1019	ev_ref (EV_A); /* signal watcher */
		1020	ev_io_stop (EV_A_ &sigev);
		1021
		1022	close (sigpipe [0]); sigpipe [0] = 0;
		1023	close (sigpipe [1]); sigpipe [1] = 0;
		1024
		1025	loop_destroy (EV_A);
		1026	}
		1027
		1028	void
		1029	ev_default_fork (void)
		1030	{
		1031	#if EV_MULTIPLICITY
		1032	struct ev_loop *loop = ev_default_loop_ptr;
		1033	#endif
		1034
		1035	if (method)
		1036	postfork = 1;
485	}	1037	}
486		1038
487	/*****************************************************************************/	1039	/*****************************************************************************/
488		1040
489	void
490	ev_prefork (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_parent (void)
497	{
498	/* nop */
499	}
500
501	void
502	ev_postfork_child (void)
503	{
504	#if EV_USE_EPOLL
505	if (ev_method == EVMETHOD_EPOLL)
506	epoll_postfork_child ();
507	#endif
508
509	ev_io_stop (&sigev);
510	close (sigpipe [0]);
511	close (sigpipe [1]);
512	pipe (sigpipe);
513	siginit ();
514	}
515
516	/*****************************************************************************/
517
518	static void	1041	static int
		1042	any_pending (EV_P)
		1043	{
		1044	int pri;
		1045
		1046	for (pri = NUMPRI; pri--; )
		1047	if (pendingcnt [pri])
		1048	return 1;
		1049
		1050	return 0;
		1051	}
		1052
		1053	inline void
519	call_pending (void)	1054	call_pending (EV_P)
520	{	1055	{
		1056	int pri;
		1057
		1058	for (pri = NUMPRI; pri--; )
521	while (pendingcnt)	1059	while (pendingcnt [pri])
522	{	1060	{
523	ANPENDING *p = pendings + --pendingcnt;	1061	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
524		1062
525	if (p->w)	1063	if (expect_true (p->w))
526	{	1064	{
527	p->w->pending = 0;	1065	p->w->pending = 0;
528	p->w->cb (p->w, p->events);	1066	EV_CB_INVOKE (p->w, p->events);
529	}	1067	}
530	}	1068	}
531	}	1069	}
532		1070
533	static void	1071	inline void
534	timers_reify (void)	1072	timers_reify (EV_P)
535	{	1073	{
536	while (timercnt && timers [0]->at <= now)	1074	while (timercnt && ((WT)timers [0])->at <= mn_now)
537	{	1075	{
538	struct ev_timer *w = timers [0];	1076	struct ev_timer *w = timers [0];
		1077
		1078	assert (("inactive timer on timer heap detected", ev_is_active (w)));
539		1079
540	/* first reschedule or stop timer */	1080	/* first reschedule or stop timer */
541	if (w->repeat)	1081	if (w->repeat)
542	{	1082	{
		1083	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1084
543	w->at = now + w->repeat;	1085	((WT)w)->at += w->repeat;
544	assert (("timer timeout in the past, negative repeat?", w->at > now));	1086	if (((WT)w)->at < mn_now)
		1087	((WT)w)->at = mn_now;
		1088
545	downheap ((WT *)timers, timercnt, 0);	1089	downheap ((WT *)timers, timercnt, 0);
546	}	1090	}
547	else	1091	else
548	ev_timer_stop (w); /* nonrepeating: stop timer */	1092	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
549		1093
550	event ((W)w, EV_TIMEOUT);	1094	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
551	}	1095	}
552	}	1096	}
553		1097
554	static void	1098	#if EV_PERIODICS
		1099	inline void
555	periodics_reify (void)	1100	periodics_reify (EV_P)
556	{	1101	{
557	while (periodiccnt && periodics [0]->at <= ev_now)	1102	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
558	{	1103	{
559	struct ev_periodic *w = periodics [0];	1104	struct ev_periodic *w = periodics [0];
560		1105
		1106	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1107
561	/* first reschedule or stop timer */	1108	/* first reschedule or stop timer */
562	if (w->interval)	1109	if (w->reschedule_cb)
563	{	1110	{
		1111	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1112	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1113	downheap ((WT *)periodics, periodiccnt, 0);
		1114	}
		1115	else if (w->interval)
		1116	{
564	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1117	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
565	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1118	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
566	downheap ((WT *)periodics, periodiccnt, 0);	1119	downheap ((WT *)periodics, periodiccnt, 0);
567	}	1120	}
568	else	1121	else
569	ev_periodic_stop (w); /* nonrepeating: stop timer */	1122	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
570		1123
571	event ((W)w, EV_TIMEOUT);	1124	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
572	}	1125	}
573	}	1126	}
574		1127
575	static void	1128	static void
576	periodics_reschedule (ev_tstamp diff)	1129	periodics_reschedule (EV_P)
577	{	1130	{
578	int i;	1131	int i;
579		1132
580	/* adjust periodics after time jump */	1133	/* adjust periodics after time jump */
581	for (i = 0; i < periodiccnt; ++i)	1134	for (i = 0; i < periodiccnt; ++i)
582	{	1135	{
583	struct ev_periodic *w = periodics [i];	1136	struct ev_periodic *w = periodics [i];
584		1137
		1138	if (w->reschedule_cb)
		1139	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
585	if (w->interval)	1140	else if (w->interval)
		1141	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1142	}
		1143
		1144	/* now rebuild the heap */
		1145	for (i = periodiccnt >> 1; i--; )
		1146	downheap ((WT *)periodics, periodiccnt, i);
		1147	}
		1148	#endif
		1149
		1150	inline int
		1151	time_update_monotonic (EV_P)
		1152	{
		1153	mn_now = get_clock ();
		1154
		1155	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1156	{
		1157	ev_rt_now = rtmn_diff + mn_now;
		1158	return 0;
		1159	}
		1160	else
		1161	{
		1162	now_floor = mn_now;
		1163	ev_rt_now = ev_time ();
		1164	return 1;
		1165	}
		1166	}
		1167
		1168	inline void
		1169	time_update (EV_P)
		1170	{
		1171	int i;
		1172
		1173	#if EV_USE_MONOTONIC
		1174	if (expect_true (have_monotonic))
		1175	{
		1176	if (time_update_monotonic (EV_A))
586	{	1177	{
587	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1178	ev_tstamp odiff = rtmn_diff;
588		1179
589	if (fabs (diff) >= 1e-4)	1180	for (i = 4; --i; ) /* loop a few times, before making important decisions */
590	{	1181	{
591	ev_periodic_stop (w);	1182	rtmn_diff = ev_rt_now - mn_now;
592	ev_periodic_start (w);
593		1183
594	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1184	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1185	return; /* all is well */
		1186
		1187	ev_rt_now = ev_time ();
		1188	mn_now = get_clock ();
		1189	now_floor = mn_now;
595	}	1190	}
		1191
		1192	# if EV_PERIODICS
		1193	periodics_reschedule (EV_A);
		1194	# endif
		1195	/* no timer adjustment, as the monotonic clock doesn't jump */
		1196	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
596	}	1197	}
597	}	1198	}
598	}	1199	else
599		1200	#endif
600	static void	1201	{
601	time_update (void)
602	{
603	int i;
604
605	ev_now = ev_time ();	1202	ev_rt_now = ev_time ();
606		1203
607	if (have_monotonic)	1204	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
608	{
609	ev_tstamp odiff = diff;
610
611	for (i = 4; --i; ) /* loop a few times, before making important decisions */
612	{	1205	{
613	now = get_clock ();	1206	#if EV_PERIODICS
614	diff = ev_now - now;
615
616	if (fabs (odiff - diff) < MIN_TIMEJUMP)
617	return; /* all is well */
618
619	ev_now = ev_time ();
620	}
621
622	periodics_reschedule (diff - odiff);
623	/* no timer adjustment, as the monotonic clock doesn't jump */
624	}
625	else
626	{
627	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
628	{
629	periodics_reschedule (ev_now - now);	1207	periodics_reschedule (EV_A);
		1208	#endif
630		1209
631	/* adjust timers. this is easy, as the offset is the same for all */	1210	/* adjust timers. this is easy, as the offset is the same for all */
632	for (i = 0; i < timercnt; ++i)	1211	for (i = 0; i < timercnt; ++i)
633	timers [i]->at += diff;	1212	((WT)timers [i])->at += ev_rt_now - mn_now;
634	}	1213	}
635		1214
636	now = ev_now;	1215	mn_now = ev_rt_now;
637	}	1216	}
638	}	1217	}
639		1218
640	int ev_loop_done;	1219	void
		1220	ev_ref (EV_P)
		1221	{
		1222	++activecnt;
		1223	}
641		1224
		1225	void
		1226	ev_unref (EV_P)
		1227	{
		1228	--activecnt;
		1229	}
		1230
		1231	static int loop_done;
		1232
		1233	void
642	void ev_loop (int flags)	1234	ev_loop (EV_P_ int flags)
643	{	1235	{
644	double block;	1236	double block;
645	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1237	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
646		1238
647	do	1239	while (activecnt)
648	{	1240	{
649	/* queue check watchers (and execute them) */	1241	/* queue check watchers (and execute them) */
650	if (preparecnt)	1242	if (expect_false (preparecnt))
651	{	1243	{
652	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1244	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
653	call_pending ();	1245	call_pending (EV_A);
654	}	1246	}
655		1247
		1248	/* we might have forked, so reify kernel state if necessary */
		1249	if (expect_false (postfork))
		1250	loop_fork (EV_A);
		1251
656	/* update fd-related kernel structures */	1252	/* update fd-related kernel structures */
657	fd_reify ();	1253	fd_reify (EV_A);
658		1254
659	/* calculate blocking time */	1255	/* calculate blocking time */
660		1256
661	/* we only need this for !monotonic clockor timers, but as we basically	1257	/* we only need this for !monotonic clock or timers, but as we basically
662	always have timers, we just calculate it always */	1258	always have timers, we just calculate it always */
		1259	#if EV_USE_MONOTONIC
		1260	if (expect_true (have_monotonic))
		1261	time_update_monotonic (EV_A);
		1262	else
		1263	#endif
		1264	{
663	ev_now = ev_time ();	1265	ev_rt_now = ev_time ();
		1266	mn_now = ev_rt_now;
		1267	}
664		1268
665	if (flags & EVLOOP_NONBLOCK || idlecnt)	1269	if (flags & EVLOOP_NONBLOCK || idlecnt)
666	block = 0.;	1270	block = 0.;
667	else	1271	else
668	{	1272	{
669	block = MAX_BLOCKTIME;	1273	block = MAX_BLOCKTIME;
670		1274
671	if (timercnt)	1275	if (timercnt)
672	{	1276	{
673	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1277	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
674	if (block > to) block = to;	1278	if (block > to) block = to;
675	}	1279	}
676		1280
		1281	#if EV_PERIODICS
677	if (periodiccnt)	1282	if (periodiccnt)
678	{	1283	{
679	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1284	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
680	if (block > to) block = to;	1285	if (block > to) block = to;
681	}	1286	}
		1287	#endif
682		1288
683	if (block < 0.) block = 0.;	1289	if (expect_false (block < 0.)) block = 0.;
684	}	1290	}
685		1291
686	method_poll (block);	1292	method_poll (EV_A_ block);
687		1293
688	/* update ev_now, do magic */	1294	/* update ev_rt_now, do magic */
689	time_update ();	1295	time_update (EV_A);
690		1296
691	/* queue pending timers and reschedule them */	1297	/* queue pending timers and reschedule them */
692	timers_reify (); /* relative timers called last */	1298	timers_reify (EV_A); /* relative timers called last */
		1299	#if EV_PERIODICS
693	periodics_reify (); /* absolute timers called first */	1300	periodics_reify (EV_A); /* absolute timers called first */
		1301	#endif
694		1302
695	/* queue idle watchers unless io or timers are pending */	1303	/* queue idle watchers unless io or timers are pending */
696	if (!pendingcnt)	1304	if (idlecnt && !any_pending (EV_A))
697	queue_events ((W *)idles, idlecnt, EV_IDLE);	1305	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
698		1306
699	/* queue check watchers, to be executed first */	1307	/* queue check watchers, to be executed first */
700	if (checkcnt)	1308	if (expect_false (checkcnt))
701	queue_events ((W *)checks, checkcnt, EV_CHECK);	1309	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
702		1310
703	call_pending ();	1311	call_pending (EV_A);
704	}
705	while (!ev_loop_done);
706		1312
		1313	if (expect_false (loop_done))
		1314	break;
		1315	}
		1316
707	if (ev_loop_done != 2)	1317	if (loop_done != 2)
708	ev_loop_done = 0;	1318	loop_done = 0;
		1319	}
		1320
		1321	void
		1322	ev_unloop (EV_P_ int how)
		1323	{
		1324	loop_done = how;
709	}	1325	}
710		1326
711	/*****************************************************************************/	1327	/*****************************************************************************/
712		1328
713	static void	1329	inline void
714	wlist_add (WL *head, WL elem)	1330	wlist_add (WL *head, WL elem)
715	{	1331	{
716	elem->next = *head;	1332	elem->next = *head;
717	*head = elem;	1333	*head = elem;
718	}	1334	}
719		1335
720	static void	1336	inline void
721	wlist_del (WL *head, WL elem)	1337	wlist_del (WL *head, WL elem)
722	{	1338	{
723	while (*head)	1339	while (*head)
724	{	1340	{
725	if (*head == elem)	1341	if (*head == elem)
…		…
730		1346
731	head = &(*head)->next;	1347	head = &(*head)->next;
732	}	1348	}
733	}	1349	}
734		1350
735	static void	1351	inline void
736	ev_clear (W w)	1352	ev_clear_pending (EV_P_ W w)
737	{	1353	{
738	if (w->pending)	1354	if (w->pending)
739	{	1355	{
740	pendings [w->pending - 1].w = 0;	1356	pendings [ABSPRI (w)][w->pending - 1].w = 0;
741	w->pending = 0;	1357	w->pending = 0;
742	}	1358	}
743	}	1359	}
744		1360
745	static void	1361	inline void
746	ev_start (W w, int active)	1362	ev_start (EV_P_ W w, int active)
747	{	1363	{
		1364	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1365	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1366
748	w->active = active;	1367	w->active = active;
		1368	ev_ref (EV_A);
749	}	1369	}
750		1370
751	static void	1371	inline void
752	ev_stop (W w)	1372	ev_stop (EV_P_ W w)
753	{	1373	{
		1374	ev_unref (EV_A);
754	w->active = 0;	1375	w->active = 0;
755	}	1376	}
756		1377
757	/*****************************************************************************/	1378	/*****************************************************************************/
758		1379
759	void	1380	void
760	ev_io_start (struct ev_io *w)	1381	ev_io_start (EV_P_ struct ev_io *w)
761	{	1382	{
		1383	int fd = w->fd;
		1384
762	if (ev_is_active (w))	1385	if (expect_false (ev_is_active (w)))
763	return;	1386	return;
764		1387
765	int fd = w->fd;	1388	assert (("ev_io_start called with negative fd", fd >= 0));
766		1389
767	ev_start ((W)w, 1);	1390	ev_start (EV_A_ (W)w, 1);
768	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1391	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
769	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1392	wlist_add ((WL *)&anfds[fd].head, (WL)w);
770		1393
771	fd_change (fd);	1394	fd_change (EV_A_ fd);
772	}	1395	}
773		1396
774	void	1397	void
775	ev_io_stop (struct ev_io *w)	1398	ev_io_stop (EV_P_ struct ev_io *w)
776	{	1399	{
777	ev_clear ((W)w);	1400	ev_clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1401	if (expect_false (!ev_is_active (w)))
779	return;	1402	return;
780		1403
		1404	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1405
781	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1406	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
782	ev_stop ((W)w);	1407	ev_stop (EV_A_ (W)w);
783		1408
784	fd_change (w->fd);	1409	fd_change (EV_A_ w->fd);
785	}	1410	}
786		1411
787	void	1412	void
788	ev_timer_start (struct ev_timer *w)	1413	ev_timer_start (EV_P_ struct ev_timer *w)
789	{	1414	{
790	if (ev_is_active (w))	1415	if (expect_false (ev_is_active (w)))
791	return;	1416	return;
792		1417
793	w->at += now;	1418	((WT)w)->at += mn_now;
794		1419
795	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1420	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
796		1421
797	ev_start ((W)w, ++timercnt);	1422	ev_start (EV_A_ (W)w, ++timercnt);
798	array_needsize (timers, timermax, timercnt, );	1423	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
799	timers [timercnt - 1] = w;	1424	timers [timercnt - 1] = w;
800	upheap ((WT *)timers, timercnt - 1);	1425	upheap ((WT *)timers, timercnt - 1);
801	}
802		1426
		1427	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1428	}
		1429
803	void	1430	void
804	ev_timer_stop (struct ev_timer *w)	1431	ev_timer_stop (EV_P_ struct ev_timer *w)
805	{	1432	{
806	ev_clear ((W)w);	1433	ev_clear_pending (EV_A_ (W)w);
807	if (!ev_is_active (w))	1434	if (expect_false (!ev_is_active (w)))
808	return;	1435	return;
809		1436
		1437	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1438
810	if (w->active < timercnt--)	1439	if (expect_true (((W)w)->active < timercnt--))
811	{	1440	{
812	timers [w->active - 1] = timers [timercnt];	1441	timers [((W)w)->active - 1] = timers [timercnt];
813	downheap ((WT *)timers, timercnt, w->active - 1);	1442	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
814	}	1443	}
815		1444
816	w->at = w->repeat;	1445	((WT)w)->at -= mn_now;
817		1446
818	ev_stop ((W)w);	1447	ev_stop (EV_A_ (W)w);
819	}	1448	}
820		1449
821	void	1450	void
822	ev_timer_again (struct ev_timer *w)	1451	ev_timer_again (EV_P_ struct ev_timer *w)
823	{	1452	{
824	if (ev_is_active (w))	1453	if (ev_is_active (w))
825	{	1454	{
826	if (w->repeat)	1455	if (w->repeat)
827	{	1456	{
828	w->at = now + w->repeat;	1457	((WT)w)->at = mn_now + w->repeat;
829	downheap ((WT *)timers, timercnt, w->active - 1);	1458	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
830	}	1459	}
831	else	1460	else
832	ev_timer_stop (w);	1461	ev_timer_stop (EV_A_ w);
833	}	1462	}
834	else if (w->repeat)	1463	else if (w->repeat)
		1464	{
		1465	w->at = w->repeat;
835	ev_timer_start (w);	1466	ev_timer_start (EV_A_ w);
		1467	}
836	}	1468	}
837		1469
		1470	#if EV_PERIODICS
838	void	1471	void
839	ev_periodic_start (struct ev_periodic *w)	1472	ev_periodic_start (EV_P_ struct ev_periodic *w)
840	{	1473	{
841	if (ev_is_active (w))	1474	if (expect_false (ev_is_active (w)))
842	return;	1475	return;
843		1476
844	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1477	if (w->reschedule_cb)
845		1478	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1479	else if (w->interval)
		1480	{
		1481	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
846	/* this formula differs from the one in periodic_reify because we do not always round up */	1482	/* this formula differs from the one in periodic_reify because we do not always round up */
847	if (w->interval)
848	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1483	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1484	}
849		1485
850	ev_start ((W)w, ++periodiccnt);	1486	ev_start (EV_A_ (W)w, ++periodiccnt);
851	array_needsize (periodics, periodicmax, periodiccnt, );	1487	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
852	periodics [periodiccnt - 1] = w;	1488	periodics [periodiccnt - 1] = w;
853	upheap ((WT *)periodics, periodiccnt - 1);	1489	upheap ((WT *)periodics, periodiccnt - 1);
854	}
855		1490
		1491	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1492	}
		1493
856	void	1494	void
857	ev_periodic_stop (struct ev_periodic *w)	1495	ev_periodic_stop (EV_P_ struct ev_periodic *w)
858	{	1496	{
859	ev_clear ((W)w);	1497	ev_clear_pending (EV_A_ (W)w);
860	if (!ev_is_active (w))	1498	if (expect_false (!ev_is_active (w)))
861	return;	1499	return;
862		1500
		1501	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1502
863	if (w->active < periodiccnt--)	1503	if (expect_true (((W)w)->active < periodiccnt--))
864	{	1504	{
865	periodics [w->active - 1] = periodics [periodiccnt];	1505	periodics [((W)w)->active - 1] = periodics [periodiccnt];
866	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1506	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
867	}	1507	}
868		1508
869	ev_stop ((W)w);	1509	ev_stop (EV_A_ (W)w);
870	}	1510	}
871		1511
872	void	1512	void
		1513	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1514	{
		1515	/* TODO: use adjustheap and recalculation */
		1516	ev_periodic_stop (EV_A_ w);
		1517	ev_periodic_start (EV_A_ w);
		1518	}
		1519	#endif
		1520
		1521	void
873	ev_signal_start (struct ev_signal *w)	1522	ev_idle_start (EV_P_ struct ev_idle *w)
874	{	1523	{
875	if (ev_is_active (w))	1524	if (expect_false (ev_is_active (w)))
876	return;	1525	return;
877		1526
		1527	ev_start (EV_A_ (W)w, ++idlecnt);
		1528	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1529	idles [idlecnt - 1] = w;
		1530	}
		1531
		1532	void
		1533	ev_idle_stop (EV_P_ struct ev_idle *w)
		1534	{
		1535	ev_clear_pending (EV_A_ (W)w);
		1536	if (expect_false (!ev_is_active (w)))
		1537	return;
		1538
		1539	idles [((W)w)->active - 1] = idles [--idlecnt];
		1540	ev_stop (EV_A_ (W)w);
		1541	}
		1542
		1543	void
		1544	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1545	{
		1546	if (expect_false (ev_is_active (w)))
		1547	return;
		1548
		1549	ev_start (EV_A_ (W)w, ++preparecnt);
		1550	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1551	prepares [preparecnt - 1] = w;
		1552	}
		1553
		1554	void
		1555	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1556	{
		1557	ev_clear_pending (EV_A_ (W)w);
		1558	if (expect_false (!ev_is_active (w)))
		1559	return;
		1560
		1561	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1562	ev_stop (EV_A_ (W)w);
		1563	}
		1564
		1565	void
		1566	ev_check_start (EV_P_ struct ev_check *w)
		1567	{
		1568	if (expect_false (ev_is_active (w)))
		1569	return;
		1570
		1571	ev_start (EV_A_ (W)w, ++checkcnt);
		1572	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1573	checks [checkcnt - 1] = w;
		1574	}
		1575
		1576	void
		1577	ev_check_stop (EV_P_ struct ev_check *w)
		1578	{
		1579	ev_clear_pending (EV_A_ (W)w);
		1580	if (expect_false (!ev_is_active (w)))
		1581	return;
		1582
		1583	checks [((W)w)->active - 1] = checks [--checkcnt];
		1584	ev_stop (EV_A_ (W)w);
		1585	}
		1586
		1587	#ifndef SA_RESTART
		1588	# define SA_RESTART 0
		1589	#endif
		1590
		1591	void
		1592	ev_signal_start (EV_P_ struct ev_signal *w)
		1593	{
		1594	#if EV_MULTIPLICITY
		1595	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1596	#endif
		1597	if (expect_false (ev_is_active (w)))
		1598	return;
		1599
		1600	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1601
878	ev_start ((W)w, 1);	1602	ev_start (EV_A_ (W)w, 1);
879	array_needsize (signals, signalmax, w->signum, signals_init);	1603	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
880	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1604	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
881		1605
882	if (!w->next)	1606	if (!((WL)w)->next)
883	{	1607	{
		1608	#if _WIN32
		1609	signal (w->signum, sighandler);
		1610	#else
884	struct sigaction sa;	1611	struct sigaction sa;
885	sa.sa_handler = sighandler;	1612	sa.sa_handler = sighandler;
886	sigfillset (&sa.sa_mask);	1613	sigfillset (&sa.sa_mask);
887	sa.sa_flags = 0;	1614	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
888	sigaction (w->signum, &sa, 0);	1615	sigaction (w->signum, &sa, 0);
		1616	#endif
889	}	1617	}
890	}	1618	}
891		1619
892	void	1620	void
893	ev_signal_stop (struct ev_signal *w)	1621	ev_signal_stop (EV_P_ struct ev_signal *w)
894	{	1622	{
895	ev_clear ((W)w);	1623	ev_clear_pending (EV_A_ (W)w);
896	if (!ev_is_active (w))	1624	if (expect_false (!ev_is_active (w)))
897	return;	1625	return;
898		1626
899	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1627	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
900	ev_stop ((W)w);	1628	ev_stop (EV_A_ (W)w);
901		1629
902	if (!signals [w->signum - 1].head)	1630	if (!signals [w->signum - 1].head)
903	signal (w->signum, SIG_DFL);	1631	signal (w->signum, SIG_DFL);
904	}	1632	}
905		1633
906	void	1634	void
907	ev_idle_start (struct ev_idle *w)	1635	ev_child_start (EV_P_ struct ev_child *w)
908	{	1636	{
		1637	#if EV_MULTIPLICITY
		1638	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1639	#endif
909	if (ev_is_active (w))	1640	if (expect_false (ev_is_active (w)))
910	return;	1641	return;
911		1642
912	ev_start ((W)w, ++idlecnt);	1643	ev_start (EV_A_ (W)w, 1);
913	array_needsize (idles, idlemax, idlecnt, );	1644	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
914	idles [idlecnt - 1] = w;
915	}	1645	}
916		1646
917	void	1647	void
918	ev_idle_stop (struct ev_idle *w)	1648	ev_child_stop (EV_P_ struct ev_child *w)
919	{	1649	{
920	ev_clear ((W)w);	1650	ev_clear_pending (EV_A_ (W)w);
921	if (ev_is_active (w))	1651	if (expect_false (!ev_is_active (w)))
922	return;	1652	return;
923		1653
924	idles [w->active - 1] = idles [--idlecnt];
925	ev_stop ((W)w);
926	}
927
928	void
929	ev_prepare_start (struct ev_prepare *w)
930	{
931	if (ev_is_active (w))
932	return;
933
934	ev_start ((W)w, ++preparecnt);
935	array_needsize (prepares, preparemax, preparecnt, );
936	prepares [preparecnt - 1] = w;
937	}
938
939	void
940	ev_prepare_stop (struct ev_prepare *w)
941	{
942	ev_clear ((W)w);
943	if (ev_is_active (w))
944	return;
945
946	prepares [w->active - 1] = prepares [--preparecnt];
947	ev_stop ((W)w);
948	}
949
950	void
951	ev_check_start (struct ev_check *w)
952	{
953	if (ev_is_active (w))
954	return;
955
956	ev_start ((W)w, ++checkcnt);
957	array_needsize (checks, checkmax, checkcnt, );
958	checks [checkcnt - 1] = w;
959	}
960
961	void
962	ev_check_stop (struct ev_check *w)
963	{
964	ev_clear ((W)w);
965	if (ev_is_active (w))
966	return;
967
968	checks [w->active - 1] = checks [--checkcnt];
969	ev_stop ((W)w);
970	}
971
972	void
973	ev_child_start (struct ev_child *w)
974	{
975	if (ev_is_active (w))
976	return;
977
978	ev_start ((W)w, 1);
979	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	}
981
982	void
983	ev_child_stop (struct ev_child *w)
984	{
985	ev_clear ((W)w);
986	if (ev_is_active (w))
987	return;
988
989	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1654	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	ev_stop ((W)w);	1655	ev_stop (EV_A_ (W)w);
991	}	1656	}
992		1657
993	/*****************************************************************************/	1658	/*****************************************************************************/
994		1659
995	struct ev_once	1660	struct ev_once
…		…
999	void (*cb)(int revents, void *arg);	1664	void (*cb)(int revents, void *arg);
1000	void *arg;	1665	void *arg;
1001	};	1666	};
1002		1667
1003	static void	1668	static void
1004	once_cb (struct ev_once *once, int revents)	1669	once_cb (EV_P_ struct ev_once *once, int revents)
1005	{	1670	{
1006	void (*cb)(int revents, void *arg) = once->cb;	1671	void (*cb)(int revents, void *arg) = once->cb;
1007	void *arg = once->arg;	1672	void *arg = once->arg;
1008		1673
1009	ev_io_stop (&once->io);	1674	ev_io_stop (EV_A_ &once->io);
1010	ev_timer_stop (&once->to);	1675	ev_timer_stop (EV_A_ &once->to);
1011	free (once);	1676	ev_free (once);
1012		1677
1013	cb (revents, arg);	1678	cb (revents, arg);
1014	}	1679	}
1015		1680
1016	static void	1681	static void
1017	once_cb_io (struct ev_io *w, int revents)	1682	once_cb_io (EV_P_ struct ev_io *w, int revents)
1018	{	1683	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1684	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1020	}	1685	}
1021		1686
1022	static void	1687	static void
1023	once_cb_to (struct ev_timer *w, int revents)	1688	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1024	{	1689	{
1025	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1690	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1026	}	1691	}
1027		1692
1028	void	1693	void
1029	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1694	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1030	{	1695	{
1031	struct ev_once *once = malloc (sizeof (struct ev_once));	1696	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1032		1697
1033	if (!once)	1698	if (expect_false (!once))
		1699	{
1034	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1700	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1035	else	1701	return;
1036	{	1702	}
		1703
1037	once->cb = cb;	1704	once->cb = cb;
1038	once->arg = arg;	1705	once->arg = arg;
1039		1706
1040	ev_watcher_init (&once->io, once_cb_io);	1707	ev_init (&once->io, once_cb_io);
1041	if (fd >= 0)	1708	if (fd >= 0)
1042	{	1709	{
1043	ev_io_set (&once->io, fd, events);	1710	ev_io_set (&once->io, fd, events);
1044	ev_io_start (&once->io);	1711	ev_io_start (EV_A_ &once->io);
1045	}	1712	}
1046		1713
1047	ev_watcher_init (&once->to, once_cb_to);	1714	ev_init (&once->to, once_cb_to);
1048	if (timeout >= 0.)	1715	if (timeout >= 0.)
1049	{	1716	{
1050	ev_timer_set (&once->to, timeout, 0.);	1717	ev_timer_set (&once->to, timeout, 0.);
1051	ev_timer_start (&once->to);	1718	ev_timer_start (EV_A_ &once->to);
1052	}
1053	}
1054	}
1055
1056	/*****************************************************************************/
1057
1058	#if 0
1059
1060	struct ev_io wio;
1061
1062	static void
1063	sin_cb (struct ev_io *w, int revents)
1064	{
1065	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1066	}
1067
1068	static void
1069	ocb (struct ev_timer *w, int revents)
1070	{
1071	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1072	ev_timer_stop (w);
1073	ev_timer_start (w);
1074	}
1075
1076	static void
1077	scb (struct ev_signal *w, int revents)
1078	{
1079	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1080	ev_io_stop (&wio);
1081	ev_io_start (&wio);
1082	}
1083
1084	static void
1085	gcb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "generic %x\n", revents);
1088
1089	}
1090
1091	int main (void)
1092	{
1093	ev_init (0);
1094
1095	ev_io_init (&wio, sin_cb, 0, EV_READ);
1096	ev_io_start (&wio);
1097
1098	struct ev_timer t[10000];
1099
1100	#if 0
1101	int i;
1102	for (i = 0; i < 10000; ++i)
1103	{	1719	}
1104	struct ev_timer *w = t + i;
1105	ev_watcher_init (w, ocb, i);
1106	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1107	ev_timer_start (w);
1108	if (drand48 () < 0.5)
1109	ev_timer_stop (w);
1110	}
1111	#endif
1112
1113	struct ev_timer t1;
1114	ev_timer_init (&t1, ocb, 5, 10);
1115	ev_timer_start (&t1);
1116
1117	struct ev_signal sig;
1118	ev_signal_init (&sig, scb, SIGQUIT);
1119	ev_signal_start (&sig);
1120
1121	struct ev_check cw;
1122	ev_check_init (&cw, gcb);
1123	ev_check_start (&cw);
1124
1125	struct ev_idle iw;
1126	ev_idle_init (&iw, gcb);
1127	ev_idle_start (&iw);
1128
1129	ev_loop (0);
1130
1131	return 0;
1132	}	1720	}
1133		1721
		1722	#ifdef __cplusplus
		1723	}
1134	#endif	1724	#endif
1135		1725
1136
1137
1138

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