[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs.
Revision 1.132 by root, Fri Nov 23 10:36:30 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# 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
		95	#endif
		96
30	#include <math.h>	97	#include <math.h>
31	#include <stdlib.h>	98	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	99	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	100	#include <stddef.h>
36		101
37	#include <stdio.h>	102	#include <stdio.h>
38		103
39	#include <assert.h>	104	#include <assert.h>
40	#include <errno.h>	105	#include <errno.h>
41	#include <sys/types.h>	106	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	107	#include <time.h>
45		108
46	#ifndef HAVE_MONOTONIC	109	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	110
48	# define HAVE_MONOTONIC 1	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
49	# endif	120	# endif
50	#endif	121	#endif
51		122
		123	/**/
		124
		125	#ifndef EV_USE_MONOTONIC
		126	# define EV_USE_MONOTONIC 0
		127	#endif
		128
		129	#ifndef EV_USE_REALTIME
		130	# define EV_USE_REALTIME 0
		131	#endif
		132
52	#ifndef HAVE_SELECT	133	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	134	# define EV_USE_SELECT 1
		135	#endif
		136
		137	#ifndef EV_USE_POLL
		138	# ifdef _WIN32
		139	# define EV_USE_POLL 0
		140	# else
		141	# define EV_USE_POLL 1
54	#endif	142	# endif
		143	#endif
55		144
56	#ifndef HAVE_EPOLL	145	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	146	# define EV_USE_EPOLL 0
58	#endif	147	#endif
59		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
60	#ifndef HAVE_REALTIME	164	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	165	# undef EV_USE_REALTIME
		166	# define EV_USE_REALTIME 0
62	#endif	167	#endif
		168
		169	#if EV_SELECT_IS_WINSOCKET
		170	# include <winsock.h>
		171	#endif
		172
		173	/**/
63		174
64	#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) */
65	#define MAX_BLOCKTIME 60.	176	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	177	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		178	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds */
67		179
		180	#ifdef EV_H
		181	# include EV_H
		182	#else
68	#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 */
69		202
70	typedef struct ev_watcher *W;	203	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	204	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	205	typedef struct ev_watcher_time *WT;
73		206
74	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
75	ev_tstamp ev_now;	296	ev_tstamp ev_rt_now;
76	int ev_method;	297	#define VAR(name,decl) static decl;
		298	#include "ev_vars.h"
		299	#undef VAR
77		300
78	static int have_monotonic; /* runtime */	301	static int ev_default_loop_ptr;
79		302
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	303	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		304
84	/*****************************************************************************/	305	/*****************************************************************************/
85		306
86	ev_tstamp	307	ev_tstamp
87	ev_time (void)	308	ev_time (void)
88	{	309	{
89	#if HAVE_REALTIME	310	#if EV_USE_REALTIME
90	struct timespec ts;	311	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	312	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	313	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	314	#else
94	struct timeval tv;	315	struct timeval tv;
95	gettimeofday (&tv, 0);	316	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	317	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	318	#endif
98	}	319	}
99		320
100	static ev_tstamp	321	inline ev_tstamp
101	get_clock (void)	322	get_clock (void)
102	{	323	{
103	#if HAVE_MONOTONIC	324	#if EV_USE_MONOTONIC
104	if (have_monotonic)	325	if (expect_true (have_monotonic))
105	{	326	{
106	struct timespec ts;	327	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	328	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	329	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	330	}
110	#endif	331	#endif
111		332
112	return ev_time ();	333	return ev_time ();
113	}	334	}
114		335
		336	#if EV_MULTIPLICITY
		337	ev_tstamp
		338	ev_now (EV_P)
		339	{
		340	return ev_rt_now;
		341	}
		342	#endif
		343
		344	#define array_roundsize(type,n) (((n) \| 4) & ~3)
		345
115	#define array_needsize(base,cur,cnt,init) \	346	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	347	if (expect_false ((cnt) > cur)) \
117	{ \	348	{ \
118	int newcnt = cur; \	349	int newcnt = cur; \
119	do \	350	do \
120	{ \	351	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	352	newcnt = array_roundsize (type, newcnt << 1); \
122	} \	353	} \
123	while ((cnt) > newcnt); \	354	while ((cnt) > newcnt); \
124	\	355	\
125	base = realloc (base, sizeof (base) (newcnt)); \	356	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
126	init (base + cur, newcnt - cur); \	357	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	358	cur = newcnt; \
128	}	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;
129		371
130	/*****************************************************************************/	372	/*****************************************************************************/
131
132	typedef struct
133	{
134	struct ev_io *head;
135	int events;
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140		373
141	static void	374	static void
142	anfds_init (ANFD *base, int count)	375	anfds_init (ANFD *base, int count)
143	{	376	{
144	while (count--)	377	while (count--)
145	{	378	{
146	base->head = 0;	379	base->head = 0;
147	base->events = EV_NONE;	380	base->events = EV_NONE;
		381	base->reify = 0;
		382
148	++base;	383	++base;
149	}	384	}
150	}	385	}
151		386
152	typedef struct	387	void
		388	ev_feed_event (EV_P_ void *w, int revents)
153	{	389	{
154	W w;	390	W w_ = (W)w;
155	int events;
156	} ANPENDING;
157		391
158	static ANPENDING *pendings;	392	if (expect_false (w_->pending))
159	static int pendingmax, pendingcnt;
160
161	static void
162	event (W w, int events)
163	{
164	if (w->active)
165	{	393	{
166	w->pending = ++pendingcnt;
167	array_needsize (pendings, pendingmax, pendingcnt, );
168	pendings [pendingcnt - 1].w = w;
169	pendings [pendingcnt - 1].events = events;	394	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		395	return;
170	}	396	}
171	}
172		397
		398	w_->pending = ++pendingcnt [ABSPRI (w_)];
		399	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		400	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		401	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		402	}
		403
173	static void	404	static void
174	queue_events (W *events, int eventcnt, int type)	405	queue_events (EV_P_ W *events, int eventcnt, int type)
175	{	406	{
176	int i;	407	int i;
177		408
178	for (i = 0; i < eventcnt; ++i)	409	for (i = 0; i < eventcnt; ++i)
179	event (events [i], type);	410	ev_feed_event (EV_A_ events [i], type);
180	}	411	}
181		412
182	static void	413	inline void
183	fd_event (int fd, int events)	414	fd_event (EV_P_ int fd, int revents)
184	{	415	{
185	ANFD *anfd = anfds + fd;	416	ANFD *anfd = anfds + fd;
186	struct ev_io *w;	417	struct ev_io *w;
187		418
188	for (w = anfd->head; w; w = w->next)	419	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
189	{	420	{
190	int ev = w->events & events;	421	int ev = w->events & revents;
191		422
192	if (ev)	423	if (ev)
193	event ((W)w, ev);	424	ev_feed_event (EV_A_ (W)w, ev);
194	}	425	}
		426	}
		427
		428	void
		429	ev_feed_fd_event (EV_P_ int fd, int revents)
		430	{
		431	fd_event (EV_A_ fd, revents);
195	}	432	}
196		433
197	/*****************************************************************************/	434	/*****************************************************************************/
198		435
199	static int *fdchanges;	436	inline void
200	static int fdchangemax, fdchangecnt;	437	fd_reify (EV_P)
201
202	static void
203	fd_reify (void)
204	{	438	{
205	int i;	439	int i;
206		440
207	for (i = 0; i < fdchangecnt; ++i)	441	for (i = 0; i < fdchangecnt; ++i)
208	{	442	{
…		…
210	ANFD *anfd = anfds + fd;	444	ANFD *anfd = anfds + fd;
211	struct ev_io *w;	445	struct ev_io *w;
212		446
213	int events = 0;	447	int events = 0;
214		448
215	for (w = anfd->head; w; w = w->next)	449	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
216	events \|= w->events;	450	events \|= w->events;
217		451
218	anfd->events &= ~EV_REIFY;	452	#if EV_SELECT_IS_WINSOCKET
219		453	if (events)
220	if (anfd->events != events)
221	{	454	{
222	method_modify (fd, anfd->events, events);	455	unsigned long argp;
223	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));
224	}	458	}
		459	#endif
		460
		461	anfd->reify = 0;
		462
		463	backend_modify (EV_A_ fd, anfd->events, events);
		464	anfd->events = events;
225	}	465	}
226		466
227	fdchangecnt = 0;	467	fdchangecnt = 0;
228	}	468	}
229		469
230	static void	470	static void
231	fd_change (int fd)	471	fd_change (EV_P_ int fd)
232	{	472	{
233	if (anfds [fd].events & EV_REIFY)	473	if (expect_false (anfds [fd].reify))
234	return;	474	return;
235		475
236	anfds [fd].events \|= EV_REIFY;	476	anfds [fd].reify = 1;
237		477
238	++fdchangecnt;	478	++fdchangecnt;
239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	479	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
240	fdchanges [fdchangecnt - 1] = fd;	480	fdchanges [fdchangecnt - 1] = fd;
241	}	481	}
242		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
243	/* called on EBADF to verify fds */	505	/* called on EBADF to verify fds */
244	static void	506	static void
245	fd_recheck (void)	507	fd_ebadf (EV_P)
246	{	508	{
247	int fd;	509	int fd;
248		510
249	for (fd = 0; fd < anfdmax; ++fd)	511	for (fd = 0; fd < anfdmax; ++fd)
250	if (anfds [fd].events)	512	if (anfds [fd].events)
251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	513	if (!fd_valid (fd) == -1 && errno == EBADF)
252	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)
253	{	525	{
254	event ((W)anfds [fd].head, EV_ERROR);	526	fd_kill (EV_A_ fd);
255	ev_io_stop (anfds [fd].head);	527	return;
256	}	528	}
		529	}
		530
		531	/* usually called after fork if backend 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	}
257	}	544	}
258		545
259	/*****************************************************************************/	546	/*****************************************************************************/
260		547
261	static struct ev_timer **timers;
262	static int timermax, timercnt;
263
264	static struct ev_periodic **periodics;
265	static int periodicmax, periodiccnt;
266
267	static void	548	static void
268	upheap (WT *timers, int k)	549	upheap (WT *heap, int k)
269	{	550	{
270	WT w = timers [k];	551	WT w = heap [k];
271		552
272	while (k && timers [k >> 1]->at > w->at)	553	while (k && heap [k >> 1]->at > w->at)
273	{	554	{
274	timers [k] = timers [k >> 1];	555	heap [k] = heap [k >> 1];
275	timers [k]->active = k + 1;	556	((W)heap [k])->active = k + 1;
276	k >>= 1;	557	k >>= 1;
277	}	558	}
278		559
279	timers [k] = w;	560	heap [k] = w;
280	timers [k]->active = k + 1;	561	((W)heap [k])->active = k + 1;
281		562
282	}	563	}
283		564
284	static void	565	static void
285	downheap (WT *timers, int N, int k)	566	downheap (WT *heap, int N, int k)
286	{	567	{
287	WT w = timers [k];	568	WT w = heap [k];
288		569
289	while (k < (N >> 1))	570	while (k < (N >> 1))
290	{	571	{
291	int j = k << 1;	572	int j = k << 1;
292		573
293	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	574	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
294	++j;	575	++j;
295		576
296	if (w->at <= timers [j]->at)	577	if (w->at <= heap [j]->at)
297	break;	578	break;
298		579
299	timers [k] = timers [j];	580	heap [k] = heap [j];
300	timers [k]->active = k + 1;	581	((W)heap [k])->active = k + 1;
301	k = j;	582	k = j;
302	}	583	}
303		584
304	timers [k] = w;	585	heap [k] = w;
305	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);
306	}	594	}
307		595
308	/*****************************************************************************/	596	/*****************************************************************************/
309		597
310	typedef struct	598	typedef struct
311	{	599	{
312	struct ev_signal *head;	600	WL head;
313	sig_atomic_t gotsig;	601	sig_atomic_t volatile gotsig;
314	} ANSIG;	602	} ANSIG;
315		603
316	static ANSIG *signals;	604	static ANSIG *signals;
317	static int signalmax;	605	static int signalmax;
318		606
319	static int sigpipe [2];	607	static int sigpipe [2];
320	static sig_atomic_t gotsig;	608	static sig_atomic_t volatile gotsig;
321	static struct ev_io sigev;	609	static struct ev_io sigev;
322		610
323	static void	611	static void
324	signals_init (ANSIG *base, int count)	612	signals_init (ANSIG *base, int count)
325	{	613	{
326	while (count--)	614	while (count--)
327	{	615	{
328	base->head = 0;	616	base->head = 0;
329	base->gotsig = 0;	617	base->gotsig = 0;
		618
330	++base;	619	++base;
331	}	620	}
332	}	621	}
333		622
334	static void	623	static void
335	sighandler (int signum)	624	sighandler (int signum)
336	{	625	{
		626	#if _WIN32
		627	signal (signum, sighandler);
		628	#endif
		629
337	signals [signum - 1].gotsig = 1;	630	signals [signum - 1].gotsig = 1;
338		631
339	if (!gotsig)	632	if (!gotsig)
340	{	633	{
		634	int old_errno = errno;
341	gotsig = 1;	635	gotsig = 1;
342	write (sigpipe [1], &gotsig, 1);	636	write (sigpipe [1], &signum, 1);
		637	errno = old_errno;
343	}	638	}
344	}	639	}
345		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
346	static void	661	static void
347	sigcb (struct ev_io *iow, int revents)	662	sigcb (EV_P_ struct ev_io *iow, int revents)
348	{	663	{
349	struct ev_signal *w;
350	int sig;	664	int signum;
351		665
		666	read (sigpipe [0], &revents, 1);
352	gotsig = 0;	667	gotsig = 0;
353	read (sigpipe [0], &revents, 1);
354		668
355	for (sig = signalmax; sig--; )	669	for (signum = signalmax; signum--; )
356	if (signals [sig].gotsig)	670	if (signals [signum].gotsig)
357	{	671	ev_feed_signal_event (EV_A_ signum + 1);
358	signals [sig].gotsig = 0;
359
360	for (w = signals [sig].head; w; w = w->next)
361	event ((W)w, EV_SIGNAL);
362	}
363	}	672	}
364		673
365	static void	674	static void
366	siginit (void)	675	fd_intern (int fd)
367	{	676	{
		677	#ifdef _WIN32
		678	int arg = 1;
		679	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		680	#else
368	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	681	fcntl (fd, F_SETFD, FD_CLOEXEC);
369	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370
371	/* rather than sort out wether we really need nb, set it */
372	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	682	fcntl (fd, F_SETFL, O_NONBLOCK);
373	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]);
374		691
375	ev_io_set (&sigev, sigpipe [0], EV_READ);	692	ev_io_set (&sigev, sigpipe [0], EV_READ);
376	ev_io_start (&sigev);	693	ev_io_start (EV_A_ &sigev);
		694	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	}	695	}
378		696
379	/*****************************************************************************/	697	/*****************************************************************************/
380		698
381	static struct ev_idle **idles;
382	static int idlemax, idlecnt;
383
384	static struct ev_prepare **prepares;
385	static int preparemax, preparecnt;
386
387	static struct ev_check **checks;
388	static int checkmax, checkcnt;
389
390	/*****************************************************************************/
391
392	static struct ev_child *childs [PID_HASHSIZE];	699	static struct ev_child *childs [PID_HASHSIZE];
		700
		701	#ifndef _WIN32
		702
393	static struct ev_signal childev;	703	static struct ev_signal childev;
394		704
395	#ifndef WCONTINUED	705	#ifndef WCONTINUED
396	# define WCONTINUED 0	706	# define WCONTINUED 0
397	#endif	707	#endif
398		708
399	static void	709	static void
400	childcb (struct ev_signal *sw, int revents)	710	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
401	{	711	{
402	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	{
403	int pid, status;	727	int pid, status;
404		728
405	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	729	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	730	{
407	if (w->pid == pid \|\| w->pid == -1)	731	/* make sure we are called again until all childs have been reaped */
408	{	732	/* we need to do it this way so that the callback gets called before we continue */
409	w->status = status;	733	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
410	event ((W)w, EV_CHILD);	734
411	}	735	child_reap (EV_A_ sw, pid, pid, status);
		736	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		737	}
412	}	738	}
		739
		740	#endif
413		741
414	/*****************************************************************************/	742	/*****************************************************************************/
415		743
		744	#if EV_USE_PORT
		745	# include "ev_port.c"
		746	#endif
		747	#if EV_USE_KQUEUE
		748	# include "ev_kqueue.c"
		749	#endif
416	#if HAVE_EPOLL	750	#if EV_USE_EPOLL
417	# include "ev_epoll.c"	751	# include "ev_epoll.c"
418	#endif	752	#endif
		753	#if EV_USE_POLL
		754	# include "ev_poll.c"
		755	#endif
419	#if HAVE_SELECT	756	#if EV_USE_SELECT
420	# include "ev_select.c"	757	# include "ev_select.c"
421	#endif	758	#endif
422		759
423	int	760	int
424	ev_version_major (void)	761	ev_version_major (void)
…		…
430	ev_version_minor (void)	767	ev_version_minor (void)
431	{	768	{
432	return EV_VERSION_MINOR;	769	return EV_VERSION_MINOR;
433	}	770	}
434		771
435	int ev_init (int flags)	772	/* return true if we are running with elevated privileges and should ignore env variables */
		773	static int
		774	enable_secure (void)
436	{	775	{
437	if (!ev_method)	776	#ifdef _WIN32
		777	return 0;
		778	#else
		779	return getuid () != geteuid ()
		780	\|\| getgid () != getegid ();
		781	#endif
		782	}
		783
		784	unsigned int
		785	ev_supported_backends (void)
		786	{
		787	unsigned int flags = 0;
		788
		789	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		790	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		791	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		792	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		793	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		794
		795	return flags;
		796	}
		797
		798	unsigned int
		799	ev_recommended_backends (void)
		800	{
		801	unsigned int flags = ev_supported_backends ();
		802
		803	#ifndef __NetBSD__
		804	/* kqueue is borked on everything but netbsd apparently */
		805	/* it usually doesn't work correctly on anything but sockets and pipes */
		806	flags &= ~EVBACKEND_KQUEUE;
		807	#endif
		808	#ifdef __APPLE__
		809	// flags &= ~EVBACKEND_KQUEUE; for documentation
		810	flags &= ~EVBACKEND_POLL;
		811	#endif
		812
		813	return flags;
		814	}
		815
		816	unsigned int
		817	ev_backend (EV_P)
		818	{
		819	return backend;
		820	}
		821
		822	static void
		823	loop_init (EV_P_ unsigned int flags)
		824	{
		825	if (!backend)
438	{	826	{
439	#if HAVE_MONOTONIC	827	#if EV_USE_MONOTONIC
440	{	828	{
441	struct timespec ts;	829	struct timespec ts;
442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	830	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443	have_monotonic = 1;	831	have_monotonic = 1;
444	}	832	}
445	#endif	833	#endif
446		834
447	ev_now = ev_time ();	835	ev_rt_now = ev_time ();
448	now = get_clock ();	836	mn_now = get_clock ();
		837	now_floor = mn_now;
449	diff = ev_now - now;	838	rtmn_diff = ev_rt_now - mn_now;
450		839
		840	if (!(flags & EVFLAG_NOENV)
		841	&& !enable_secure ()
		842	&& getenv ("LIBEV_FLAGS"))
		843	flags = atoi (getenv ("LIBEV_FLAGS"));
		844
		845	if (!(flags & 0x0000ffffUL))
		846	flags \|= ev_recommended_backends ();
		847
		848	backend = 0;
		849	#if EV_USE_PORT
		850	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		851	#endif
		852	#if EV_USE_KQUEUE
		853	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		854	#endif
		855	#if EV_USE_EPOLL
		856	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		857	#endif
		858	#if EV_USE_POLL
		859	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		860	#endif
		861	#if EV_USE_SELECT
		862	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		863	#endif
		864
		865	ev_init (&sigev, sigcb);
		866	ev_set_priority (&sigev, EV_MAXPRI);
		867	}
		868	}
		869
		870	static void
		871	loop_destroy (EV_P)
		872	{
		873	int i;
		874
		875	#if EV_USE_PORT
		876	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		877	#endif
		878	#if EV_USE_KQUEUE
		879	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		880	#endif
		881	#if EV_USE_EPOLL
		882	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		883	#endif
		884	#if EV_USE_POLL
		885	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		886	#endif
		887	#if EV_USE_SELECT
		888	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		889	#endif
		890
		891	for (i = NUMPRI; i--; )
		892	array_free (pending, [i]);
		893
		894	/* have to use the microsoft-never-gets-it-right macro */
		895	array_free (fdchange, EMPTY0);
		896	array_free (timer, EMPTY0);
		897	#if EV_PERIODICS
		898	array_free (periodic, EMPTY0);
		899	#endif
		900	array_free (idle, EMPTY0);
		901	array_free (prepare, EMPTY0);
		902	array_free (check, EMPTY0);
		903
		904	backend = 0;
		905	}
		906
		907	static void
		908	loop_fork (EV_P)
		909	{
		910	#if EV_USE_PORT
		911	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		912	#endif
		913	#if EV_USE_KQUEUE
		914	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		915	#endif
		916	#if EV_USE_EPOLL
		917	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		918	#endif
		919
		920	if (ev_is_active (&sigev))
		921	{
		922	/* default loop */
		923
		924	ev_ref (EV_A);
		925	ev_io_stop (EV_A_ &sigev);
		926	close (sigpipe [0]);
		927	close (sigpipe [1]);
		928
		929	while (pipe (sigpipe))
		930	syserr ("(libev) error creating pipe");
		931
		932	siginit (EV_A);
		933	}
		934
		935	postfork = 0;
		936	}
		937
		938	#if EV_MULTIPLICITY
		939	struct ev_loop *
		940	ev_loop_new (unsigned int flags)
		941	{
		942	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		943
		944	memset (loop, 0, sizeof (struct ev_loop));
		945
		946	loop_init (EV_A_ flags);
		947
		948	if (ev_backend (EV_A))
		949	return loop;
		950
		951	return 0;
		952	}
		953
		954	void
		955	ev_loop_destroy (EV_P)
		956	{
		957	loop_destroy (EV_A);
		958	ev_free (loop);
		959	}
		960
		961	void
		962	ev_loop_fork (EV_P)
		963	{
		964	postfork = 1;
		965	}
		966
		967	#endif
		968
		969	#if EV_MULTIPLICITY
		970	struct ev_loop *
		971	ev_default_loop_init (unsigned int flags)
		972	#else
		973	int
		974	ev_default_loop (unsigned int flags)
		975	#endif
		976	{
		977	if (sigpipe [0] == sigpipe [1])
451	if (pipe (sigpipe))	978	if (pipe (sigpipe))
452	return 0;	979	return 0;
453		980
454	ev_method = EVMETHOD_NONE;	981	if (!ev_default_loop_ptr)
455	#if HAVE_EPOLL	982	{
456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	983	#if EV_MULTIPLICITY
		984	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		985	#else
		986	ev_default_loop_ptr = 1;
457	#endif	987	#endif
458	#if HAVE_SELECT
459	if (ev_method == EVMETHOD_NONE) select_init (flags);
460	#endif
461		988
462	if (ev_method)	989	loop_init (EV_A_ flags);
		990
		991	if (ev_backend (EV_A))
463	{	992	{
464	ev_watcher_init (&sigev, sigcb);
465	siginit ();	993	siginit (EV_A);
466		994
		995	#ifndef _WIN32
467	ev_signal_init (&childev, childcb, SIGCHLD);	996	ev_signal_init (&childev, childcb, SIGCHLD);
		997	ev_set_priority (&childev, EV_MAXPRI);
468	ev_signal_start (&childev);	998	ev_signal_start (EV_A_ &childev);
		999	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1000	#endif
469	}	1001	}
		1002	else
		1003	ev_default_loop_ptr = 0;
470	}	1004	}
471		1005
472	return ev_method;	1006	return ev_default_loop_ptr;
		1007	}
		1008
		1009	void
		1010	ev_default_destroy (void)
		1011	{
		1012	#if EV_MULTIPLICITY
		1013	struct ev_loop *loop = ev_default_loop_ptr;
		1014	#endif
		1015
		1016	#ifndef _WIN32
		1017	ev_ref (EV_A); /* child watcher */
		1018	ev_signal_stop (EV_A_ &childev);
		1019	#endif
		1020
		1021	ev_ref (EV_A); /* signal watcher */
		1022	ev_io_stop (EV_A_ &sigev);
		1023
		1024	close (sigpipe [0]); sigpipe [0] = 0;
		1025	close (sigpipe [1]); sigpipe [1] = 0;
		1026
		1027	loop_destroy (EV_A);
		1028	}
		1029
		1030	void
		1031	ev_default_fork (void)
		1032	{
		1033	#if EV_MULTIPLICITY
		1034	struct ev_loop *loop = ev_default_loop_ptr;
		1035	#endif
		1036
		1037	if (backend)
		1038	postfork = 1;
473	}	1039	}
474		1040
475	/*****************************************************************************/	1041	/*****************************************************************************/
476		1042
477	void
478	ev_prefork (void)
479	{
480	/* nop */
481	}
482
483	void
484	ev_postfork_parent (void)
485	{
486	/* nop */
487	}
488
489	void
490	ev_postfork_child (void)
491	{
492	#if HAVE_EPOLL
493	if (ev_method == EVMETHOD_EPOLL)
494	epoll_postfork_child ();
495	#endif
496
497	ev_io_stop (&sigev);
498	close (sigpipe [0]);
499	close (sigpipe [1]);
500	pipe (sigpipe);
501	siginit ();
502	}
503
504	/*****************************************************************************/
505
506	static void	1043	static int
		1044	any_pending (EV_P)
		1045	{
		1046	int pri;
		1047
		1048	for (pri = NUMPRI; pri--; )
		1049	if (pendingcnt [pri])
		1050	return 1;
		1051
		1052	return 0;
		1053	}
		1054
		1055	inline void
507	call_pending (void)	1056	call_pending (EV_P)
508	{	1057	{
		1058	int pri;
		1059
		1060	for (pri = NUMPRI; pri--; )
509	while (pendingcnt)	1061	while (pendingcnt [pri])
510	{	1062	{
511	ANPENDING *p = pendings + --pendingcnt;	1063	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512		1064
513	if (p->w)	1065	if (expect_true (p->w))
514	{	1066	{
515	p->w->pending = 0;	1067	p->w->pending = 0;
516	p->w->cb (p->w, p->events);	1068	EV_CB_INVOKE (p->w, p->events);
517	}	1069	}
518	}	1070	}
519	}	1071	}
520		1072
521	static void	1073	inline void
522	timers_reify (void)	1074	timers_reify (EV_P)
523	{	1075	{
524	while (timercnt && timers [0]->at <= now)	1076	while (timercnt && ((WT)timers [0])->at <= mn_now)
525	{	1077	{
526	struct ev_timer *w = timers [0];	1078	struct ev_timer *w = timers [0];
527		1079
528	event ((W)w, EV_TIMEOUT);	1080	assert (("inactive timer on timer heap detected", ev_is_active (w)));
529		1081
530	/* first reschedule or stop timer */	1082	/* first reschedule or stop timer */
531	if (w->repeat)	1083	if (w->repeat)
532	{	1084	{
		1085	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1086
533	w->at = now + w->repeat;	1087	((WT)w)->at += w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));	1088	if (((WT)w)->at < mn_now)
		1089	((WT)w)->at = mn_now;
		1090
535	downheap ((WT *)timers, timercnt, 0);	1091	downheap ((WT *)timers, timercnt, 0);
536	}	1092	}
537	else	1093	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	1094	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539	}
540	}
541		1095
542	static void	1096	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1097	}
		1098	}
		1099
		1100	#if EV_PERIODICS
		1101	inline void
543	periodics_reify (void)	1102	periodics_reify (EV_P)
544	{	1103	{
545	while (periodiccnt && periodics [0]->at <= ev_now)	1104	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
546	{	1105	{
547	struct ev_periodic *w = periodics [0];	1106	struct ev_periodic *w = periodics [0];
548		1107
		1108	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1109
549	/* first reschedule or stop timer */	1110	/* first reschedule or stop timer */
550	if (w->interval)	1111	if (w->reschedule_cb)
551	{	1112	{
		1113	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1114	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1115	downheap ((WT *)periodics, periodiccnt, 0);
		1116	}
		1117	else if (w->interval)
		1118	{
552	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1119	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
553	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1120	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
554	downheap ((WT *)periodics, periodiccnt, 0);	1121	downheap ((WT *)periodics, periodiccnt, 0);
555	}	1122	}
556	else	1123	else
557	ev_periodic_stop (w); /* nonrepeating: stop timer */	1124	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
558		1125
559	event ((W)w, EV_TIMEOUT);	1126	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
560	}	1127	}
561	}	1128	}
562		1129
563	static void	1130	static void
564	periodics_reschedule (ev_tstamp diff)	1131	periodics_reschedule (EV_P)
565	{	1132	{
566	int i;	1133	int i;
567		1134
568	/* adjust periodics after time jump */	1135	/* adjust periodics after time jump */
569	for (i = 0; i < periodiccnt; ++i)	1136	for (i = 0; i < periodiccnt; ++i)
570	{	1137	{
571	struct ev_periodic *w = periodics [i];	1138	struct ev_periodic *w = periodics [i];
572		1139
		1140	if (w->reschedule_cb)
		1141	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
573	if (w->interval)	1142	else if (w->interval)
		1143	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1144	}
		1145
		1146	/* now rebuild the heap */
		1147	for (i = periodiccnt >> 1; i--; )
		1148	downheap ((WT *)periodics, periodiccnt, i);
		1149	}
		1150	#endif
		1151
		1152	inline int
		1153	time_update_monotonic (EV_P)
		1154	{
		1155	mn_now = get_clock ();
		1156
		1157	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1158	{
		1159	ev_rt_now = rtmn_diff + mn_now;
		1160	return 0;
		1161	}
		1162	else
		1163	{
		1164	now_floor = mn_now;
		1165	ev_rt_now = ev_time ();
		1166	return 1;
		1167	}
		1168	}
		1169
		1170	inline void
		1171	time_update (EV_P)
		1172	{
		1173	int i;
		1174
		1175	#if EV_USE_MONOTONIC
		1176	if (expect_true (have_monotonic))
		1177	{
		1178	if (time_update_monotonic (EV_A))
574	{	1179	{
575	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1180	ev_tstamp odiff = rtmn_diff;
576		1181
577	if (fabs (diff) >= 1e-4)	1182	for (i = 4; --i; ) /* loop a few times, before making important decisions */
578	{	1183	{
579	ev_periodic_stop (w);	1184	rtmn_diff = ev_rt_now - mn_now;
580	ev_periodic_start (w);
581		1185
582	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1186	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1187	return; /* all is well */
		1188
		1189	ev_rt_now = ev_time ();
		1190	mn_now = get_clock ();
		1191	now_floor = mn_now;
583	}	1192	}
		1193
		1194	# if EV_PERIODICS
		1195	periodics_reschedule (EV_A);
		1196	# endif
		1197	/* no timer adjustment, as the monotonic clock doesn't jump */
		1198	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
584	}	1199	}
585	}	1200	}
586	}	1201	else
587		1202	#endif
588	static void	1203	{
589	time_update (void)
590	{
591	int i;
592
593	ev_now = ev_time ();	1204	ev_rt_now = ev_time ();
594		1205
595	if (have_monotonic)	1206	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
596	{
597	ev_tstamp odiff = diff;
598
599	for (i = 4; --i; ) /* loop a few times, before making important decisions */
600	{	1207	{
601	now = get_clock ();	1208	#if EV_PERIODICS
602	diff = ev_now - now;
603
604	if (fabs (odiff - diff) < MIN_TIMEJUMP)
605	return; /* all is well */
606
607	ev_now = ev_time ();
608	}
609
610	periodics_reschedule (diff - odiff);
611	/* no timer adjustment, as the monotonic clock doesn't jump */
612	}
613	else
614	{
615	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
616	{
617	periodics_reschedule (ev_now - now);	1209	periodics_reschedule (EV_A);
		1210	#endif
618		1211
619	/* adjust timers. this is easy, as the offset is the same for all */	1212	/* adjust timers. this is easy, as the offset is the same for all */
620	for (i = 0; i < timercnt; ++i)	1213	for (i = 0; i < timercnt; ++i)
621	timers [i]->at += diff;	1214	((WT)timers [i])->at += ev_rt_now - mn_now;
622	}	1215	}
623		1216
624	now = ev_now;	1217	mn_now = ev_rt_now;
625	}	1218	}
626	}	1219	}
627		1220
628	int ev_loop_done;	1221	void
		1222	ev_ref (EV_P)
		1223	{
		1224	++activecnt;
		1225	}
629		1226
		1227	void
		1228	ev_unref (EV_P)
		1229	{
		1230	--activecnt;
		1231	}
		1232
		1233	static int loop_done;
		1234
		1235	void
630	void ev_loop (int flags)	1236	ev_loop (EV_P_ int flags)
631	{	1237	{
632	double block;	1238	double block;
633	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1239	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
634		1240
635	do	1241	while (activecnt)
636	{	1242	{
637	/* queue check watchers (and execute them) */	1243	/* queue check watchers (and execute them) */
638	if (preparecnt)	1244	if (expect_false (preparecnt))
639	{	1245	{
640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1246	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
641	call_pending ();	1247	call_pending (EV_A);
642	}	1248	}
643		1249
		1250	/* we might have forked, so reify kernel state if necessary */
		1251	if (expect_false (postfork))
		1252	loop_fork (EV_A);
		1253
644	/* update fd-related kernel structures */	1254	/* update fd-related kernel structures */
645	fd_reify ();	1255	fd_reify (EV_A);
646		1256
647	/* calculate blocking time */	1257	/* calculate blocking time */
648		1258
649	/* we only need this for !monotonic clockor timers, but as we basically	1259	/* we only need this for !monotonic clock or timers, but as we basically
650	always have timers, we just calculate it always */	1260	always have timers, we just calculate it always */
		1261	#if EV_USE_MONOTONIC
		1262	if (expect_true (have_monotonic))
		1263	time_update_monotonic (EV_A);
		1264	else
		1265	#endif
		1266	{
651	ev_now = ev_time ();	1267	ev_rt_now = ev_time ();
		1268	mn_now = ev_rt_now;
		1269	}
652		1270
653	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1271	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
654	block = 0.;	1272	block = 0.;
655	else	1273	else
656	{	1274	{
657	block = MAX_BLOCKTIME;	1275	block = MAX_BLOCKTIME;
658		1276
659	if (timercnt)	1277	if (timercnt)
660	{	1278	{
661	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1279	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
662	if (block > to) block = to;	1280	if (block > to) block = to;
663	}	1281	}
664		1282
		1283	#if EV_PERIODICS
665	if (periodiccnt)	1284	if (periodiccnt)
666	{	1285	{
667	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1286	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
668	if (block > to) block = to;	1287	if (block > to) block = to;
669	}	1288	}
		1289	#endif
670		1290
671	if (block < 0.) block = 0.;	1291	if (expect_false (block < 0.)) block = 0.;
672	}	1292	}
673		1293
674	method_poll (block);	1294	backend_poll (EV_A_ block);
675		1295
676	/* update ev_now, do magic */	1296	/* update ev_rt_now, do magic */
677	time_update ();	1297	time_update (EV_A);
678		1298
679	/* queue pending timers and reschedule them */	1299	/* queue pending timers and reschedule them */
680	timers_reify (); /* relative timers called last */	1300	timers_reify (EV_A); /* relative timers called last */
		1301	#if EV_PERIODICS
681	periodics_reify (); /* absolute timers called first */	1302	periodics_reify (EV_A); /* absolute timers called first */
		1303	#endif
682		1304
683	/* queue idle watchers unless io or timers are pending */	1305	/* queue idle watchers unless io or timers are pending */
684	if (!pendingcnt)	1306	if (idlecnt && !any_pending (EV_A))
685	queue_events ((W *)idles, idlecnt, EV_IDLE);	1307	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
686		1308
687	/* queue check watchers, to be executed first */	1309	/* queue check watchers, to be executed first */
688	if (checkcnt)	1310	if (expect_false (checkcnt))
689	queue_events ((W *)checks, checkcnt, EV_CHECK);	1311	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690		1312
691	call_pending ();	1313	call_pending (EV_A);
692	}
693	while (!ev_loop_done);
694		1314
		1315	if (expect_false (loop_done))
		1316	break;
		1317	}
		1318
695	if (ev_loop_done != 2)	1319	if (loop_done != 2)
696	ev_loop_done = 0;	1320	loop_done = 0;
		1321	}
		1322
		1323	void
		1324	ev_unloop (EV_P_ int how)
		1325	{
		1326	loop_done = how;
697	}	1327	}
698		1328
699	/*****************************************************************************/	1329	/*****************************************************************************/
700		1330
701	static void	1331	inline void
702	wlist_add (WL *head, WL elem)	1332	wlist_add (WL *head, WL elem)
703	{	1333	{
704	elem->next = *head;	1334	elem->next = *head;
705	*head = elem;	1335	*head = elem;
706	}	1336	}
707		1337
708	static void	1338	inline void
709	wlist_del (WL *head, WL elem)	1339	wlist_del (WL *head, WL elem)
710	{	1340	{
711	while (*head)	1341	while (*head)
712	{	1342	{
713	if (*head == elem)	1343	if (*head == elem)
…		…
718		1348
719	head = &(*head)->next;	1349	head = &(*head)->next;
720	}	1350	}
721	}	1351	}
722		1352
723	static void	1353	inline void
724	ev_clear (W w)	1354	ev_clear_pending (EV_P_ W w)
725	{	1355	{
726	if (w->pending)	1356	if (w->pending)
727	{	1357	{
728	pendings [w->pending - 1].w = 0;	1358	pendings [ABSPRI (w)][w->pending - 1].w = 0;
729	w->pending = 0;	1359	w->pending = 0;
730	}	1360	}
731	}	1361	}
732		1362
733	static void	1363	inline void
734	ev_start (W w, int active)	1364	ev_start (EV_P_ W w, int active)
735	{	1365	{
		1366	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1367	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1368
736	w->active = active;	1369	w->active = active;
		1370	ev_ref (EV_A);
737	}	1371	}
738		1372
739	static void	1373	inline void
740	ev_stop (W w)	1374	ev_stop (EV_P_ W w)
741	{	1375	{
		1376	ev_unref (EV_A);
742	w->active = 0;	1377	w->active = 0;
743	}	1378	}
744		1379
745	/*****************************************************************************/	1380	/*****************************************************************************/
746		1381
747	void	1382	void
748	ev_io_start (struct ev_io *w)	1383	ev_io_start (EV_P_ struct ev_io *w)
749	{	1384	{
		1385	int fd = w->fd;
		1386
750	if (ev_is_active (w))	1387	if (expect_false (ev_is_active (w)))
751	return;	1388	return;
752		1389
753	int fd = w->fd;	1390	assert (("ev_io_start called with negative fd", fd >= 0));
754		1391
755	ev_start ((W)w, 1);	1392	ev_start (EV_A_ (W)w, 1);
756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1393	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
757	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1394	wlist_add ((WL *)&anfds[fd].head, (WL)w);
758		1395
759	fd_change (fd);	1396	fd_change (EV_A_ fd);
760	}	1397	}
761		1398
762	void	1399	void
763	ev_io_stop (struct ev_io *w)	1400	ev_io_stop (EV_P_ struct ev_io *w)
764	{	1401	{
765	ev_clear ((W)w);	1402	ev_clear_pending (EV_A_ (W)w);
766	if (!ev_is_active (w))	1403	if (expect_false (!ev_is_active (w)))
767	return;	1404	return;
768		1405
		1406	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1407
769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1408	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770	ev_stop ((W)w);	1409	ev_stop (EV_A_ (W)w);
771		1410
772	fd_change (w->fd);	1411	fd_change (EV_A_ w->fd);
773	}	1412	}
774		1413
775	void	1414	void
776	ev_timer_start (struct ev_timer *w)	1415	ev_timer_start (EV_P_ struct ev_timer *w)
777	{	1416	{
778	if (ev_is_active (w))	1417	if (expect_false (ev_is_active (w)))
779	return;	1418	return;
780		1419
781	w->at += now;	1420	((WT)w)->at += mn_now;
782		1421
783	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1422	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
784		1423
785	ev_start ((W)w, ++timercnt);	1424	ev_start (EV_A_ (W)w, ++timercnt);
786	array_needsize (timers, timermax, timercnt, );	1425	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
787	timers [timercnt - 1] = w;	1426	timers [timercnt - 1] = w;
788	upheap ((WT *)timers, timercnt - 1);	1427	upheap ((WT *)timers, timercnt - 1);
789	}
790		1428
		1429	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1430	}
		1431
791	void	1432	void
792	ev_timer_stop (struct ev_timer *w)	1433	ev_timer_stop (EV_P_ struct ev_timer *w)
793	{	1434	{
794	ev_clear ((W)w);	1435	ev_clear_pending (EV_A_ (W)w);
795	if (!ev_is_active (w))	1436	if (expect_false (!ev_is_active (w)))
796	return;	1437	return;
797		1438
		1439	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1440
798	if (w->active < timercnt--)	1441	if (expect_true (((W)w)->active < timercnt--))
799	{	1442	{
800	timers [w->active - 1] = timers [timercnt];	1443	timers [((W)w)->active - 1] = timers [timercnt];
801	downheap ((WT *)timers, timercnt, w->active - 1);	1444	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
802	}	1445	}
803		1446
804	w->at = w->repeat;	1447	((WT)w)->at -= mn_now;
805		1448
806	ev_stop ((W)w);	1449	ev_stop (EV_A_ (W)w);
807	}	1450	}
808		1451
809	void	1452	void
810	ev_timer_again (struct ev_timer *w)	1453	ev_timer_again (EV_P_ struct ev_timer *w)
811	{	1454	{
812	if (ev_is_active (w))	1455	if (ev_is_active (w))
813	{	1456	{
814	if (w->repeat)	1457	if (w->repeat)
815	{	1458	{
816	w->at = now + w->repeat;	1459	((WT)w)->at = mn_now + w->repeat;
817	downheap ((WT *)timers, timercnt, w->active - 1);	1460	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
818	}	1461	}
819	else	1462	else
820	ev_timer_stop (w);	1463	ev_timer_stop (EV_A_ w);
821	}	1464	}
822	else if (w->repeat)	1465	else if (w->repeat)
		1466	{
		1467	w->at = w->repeat;
823	ev_timer_start (w);	1468	ev_timer_start (EV_A_ w);
		1469	}
824	}	1470	}
825		1471
		1472	#if EV_PERIODICS
826	void	1473	void
827	ev_periodic_start (struct ev_periodic *w)	1474	ev_periodic_start (EV_P_ struct ev_periodic *w)
828	{	1475	{
829	if (ev_is_active (w))	1476	if (expect_false (ev_is_active (w)))
830	return;	1477	return;
831		1478
832	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1479	if (w->reschedule_cb)
833		1480	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1481	else if (w->interval)
		1482	{
		1483	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
834	/* this formula differs from the one in periodic_reify because we do not always round up */	1484	/* this formula differs from the one in periodic_reify because we do not always round up */
835	if (w->interval)
836	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1485	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1486	}
837		1487
838	ev_start ((W)w, ++periodiccnt);	1488	ev_start (EV_A_ (W)w, ++periodiccnt);
839	array_needsize (periodics, periodicmax, periodiccnt, );	1489	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
840	periodics [periodiccnt - 1] = w;	1490	periodics [periodiccnt - 1] = w;
841	upheap ((WT *)periodics, periodiccnt - 1);	1491	upheap ((WT *)periodics, periodiccnt - 1);
842	}
843		1492
		1493	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1494	}
		1495
844	void	1496	void
845	ev_periodic_stop (struct ev_periodic *w)	1497	ev_periodic_stop (EV_P_ struct ev_periodic *w)
846	{	1498	{
847	ev_clear ((W)w);	1499	ev_clear_pending (EV_A_ (W)w);
848	if (!ev_is_active (w))	1500	if (expect_false (!ev_is_active (w)))
849	return;	1501	return;
850		1502
		1503	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1504
851	if (w->active < periodiccnt--)	1505	if (expect_true (((W)w)->active < periodiccnt--))
852	{	1506	{
853	periodics [w->active - 1] = periodics [periodiccnt];	1507	periodics [((W)w)->active - 1] = periodics [periodiccnt];
854	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1508	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
855	}	1509	}
856		1510
857	ev_stop ((W)w);	1511	ev_stop (EV_A_ (W)w);
858	}	1512	}
859		1513
860	void	1514	void
		1515	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1516	{
		1517	/* TODO: use adjustheap and recalculation */
		1518	ev_periodic_stop (EV_A_ w);
		1519	ev_periodic_start (EV_A_ w);
		1520	}
		1521	#endif
		1522
		1523	void
861	ev_signal_start (struct ev_signal *w)	1524	ev_idle_start (EV_P_ struct ev_idle *w)
862	{	1525	{
863	if (ev_is_active (w))	1526	if (expect_false (ev_is_active (w)))
864	return;	1527	return;
865		1528
		1529	ev_start (EV_A_ (W)w, ++idlecnt);
		1530	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1531	idles [idlecnt - 1] = w;
		1532	}
		1533
		1534	void
		1535	ev_idle_stop (EV_P_ struct ev_idle *w)
		1536	{
		1537	ev_clear_pending (EV_A_ (W)w);
		1538	if (expect_false (!ev_is_active (w)))
		1539	return;
		1540
		1541	idles [((W)w)->active - 1] = idles [--idlecnt];
		1542	ev_stop (EV_A_ (W)w);
		1543	}
		1544
		1545	void
		1546	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1547	{
		1548	if (expect_false (ev_is_active (w)))
		1549	return;
		1550
		1551	ev_start (EV_A_ (W)w, ++preparecnt);
		1552	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1553	prepares [preparecnt - 1] = w;
		1554	}
		1555
		1556	void
		1557	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1558	{
		1559	ev_clear_pending (EV_A_ (W)w);
		1560	if (expect_false (!ev_is_active (w)))
		1561	return;
		1562
		1563	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1564	ev_stop (EV_A_ (W)w);
		1565	}
		1566
		1567	void
		1568	ev_check_start (EV_P_ struct ev_check *w)
		1569	{
		1570	if (expect_false (ev_is_active (w)))
		1571	return;
		1572
		1573	ev_start (EV_A_ (W)w, ++checkcnt);
		1574	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1575	checks [checkcnt - 1] = w;
		1576	}
		1577
		1578	void
		1579	ev_check_stop (EV_P_ struct ev_check *w)
		1580	{
		1581	ev_clear_pending (EV_A_ (W)w);
		1582	if (expect_false (!ev_is_active (w)))
		1583	return;
		1584
		1585	checks [((W)w)->active - 1] = checks [--checkcnt];
		1586	ev_stop (EV_A_ (W)w);
		1587	}
		1588
		1589	#ifndef SA_RESTART
		1590	# define SA_RESTART 0
		1591	#endif
		1592
		1593	void
		1594	ev_signal_start (EV_P_ struct ev_signal *w)
		1595	{
		1596	#if EV_MULTIPLICITY
		1597	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1598	#endif
		1599	if (expect_false (ev_is_active (w)))
		1600	return;
		1601
		1602	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1603
866	ev_start ((W)w, 1);	1604	ev_start (EV_A_ (W)w, 1);
867	array_needsize (signals, signalmax, w->signum, signals_init);	1605	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
868	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1606	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869		1607
870	if (!w->next)	1608	if (!((WL)w)->next)
871	{	1609	{
		1610	#if _WIN32
		1611	signal (w->signum, sighandler);
		1612	#else
872	struct sigaction sa;	1613	struct sigaction sa;
873	sa.sa_handler = sighandler;	1614	sa.sa_handler = sighandler;
874	sigfillset (&sa.sa_mask);	1615	sigfillset (&sa.sa_mask);
875	sa.sa_flags = 0;	1616	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876	sigaction (w->signum, &sa, 0);	1617	sigaction (w->signum, &sa, 0);
		1618	#endif
877	}	1619	}
878	}	1620	}
879		1621
880	void	1622	void
881	ev_signal_stop (struct ev_signal *w)	1623	ev_signal_stop (EV_P_ struct ev_signal *w)
882	{	1624	{
883	ev_clear ((W)w);	1625	ev_clear_pending (EV_A_ (W)w);
884	if (!ev_is_active (w))	1626	if (expect_false (!ev_is_active (w)))
885	return;	1627	return;
886		1628
887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1629	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888	ev_stop ((W)w);	1630	ev_stop (EV_A_ (W)w);
889		1631
890	if (!signals [w->signum - 1].head)	1632	if (!signals [w->signum - 1].head)
891	signal (w->signum, SIG_DFL);	1633	signal (w->signum, SIG_DFL);
892	}	1634	}
893		1635
894	void	1636	void
895	ev_idle_start (struct ev_idle *w)	1637	ev_child_start (EV_P_ struct ev_child *w)
896	{	1638	{
		1639	#if EV_MULTIPLICITY
		1640	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1641	#endif
897	if (ev_is_active (w))	1642	if (expect_false (ev_is_active (w)))
898	return;	1643	return;
899		1644
900	ev_start ((W)w, ++idlecnt);	1645	ev_start (EV_A_ (W)w, 1);
901	array_needsize (idles, idlemax, idlecnt, );	1646	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
902	idles [idlecnt - 1] = w;
903	}	1647	}
904		1648
905	void	1649	void
906	ev_idle_stop (struct ev_idle *w)	1650	ev_child_stop (EV_P_ struct ev_child *w)
907	{	1651	{
908	ev_clear ((W)w);	1652	ev_clear_pending (EV_A_ (W)w);
909	if (ev_is_active (w))	1653	if (expect_false (!ev_is_active (w)))
910	return;	1654	return;
911		1655
912	idles [w->active - 1] = idles [--idlecnt];
913	ev_stop ((W)w);
914	}
915
916	void
917	ev_prepare_start (struct ev_prepare *w)
918	{
919	if (ev_is_active (w))
920	return;
921
922	ev_start ((W)w, ++preparecnt);
923	array_needsize (prepares, preparemax, preparecnt, );
924	prepares [preparecnt - 1] = w;
925	}
926
927	void
928	ev_prepare_stop (struct ev_prepare *w)
929	{
930	ev_clear ((W)w);
931	if (ev_is_active (w))
932	return;
933
934	prepares [w->active - 1] = prepares [--preparecnt];
935	ev_stop ((W)w);
936	}
937
938	void
939	ev_check_start (struct ev_check *w)
940	{
941	if (ev_is_active (w))
942	return;
943
944	ev_start ((W)w, ++checkcnt);
945	array_needsize (checks, checkmax, checkcnt, );
946	checks [checkcnt - 1] = w;
947	}
948
949	void
950	ev_check_stop (struct ev_check *w)
951	{
952	ev_clear ((W)w);
953	if (ev_is_active (w))
954	return;
955
956	checks [w->active - 1] = checks [--checkcnt];
957	ev_stop ((W)w);
958	}
959
960	void
961	ev_child_start (struct ev_child *w)
962	{
963	if (ev_is_active (w))
964	return;
965
966	ev_start ((W)w, 1);
967	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
968	}
969
970	void
971	ev_child_stop (struct ev_child *w)
972	{
973	ev_clear ((W)w);
974	if (ev_is_active (w))
975	return;
976
977	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1656	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
978	ev_stop ((W)w);	1657	ev_stop (EV_A_ (W)w);
979	}	1658	}
980		1659
981	/*****************************************************************************/	1660	/*****************************************************************************/
982		1661
983	struct ev_once	1662	struct ev_once
…		…
987	void (cb)(int revents, void arg);	1666	void (cb)(int revents, void arg);
988	void *arg;	1667	void *arg;
989	};	1668	};
990		1669
991	static void	1670	static void
992	once_cb (struct ev_once *once, int revents)	1671	once_cb (EV_P_ struct ev_once *once, int revents)
993	{	1672	{
994	void (cb)(int revents, void arg) = once->cb;	1673	void (cb)(int revents, void arg) = once->cb;
995	void *arg = once->arg;	1674	void *arg = once->arg;
996		1675
997	ev_io_stop (&once->io);	1676	ev_io_stop (EV_A_ &once->io);
998	ev_timer_stop (&once->to);	1677	ev_timer_stop (EV_A_ &once->to);
999	free (once);	1678	ev_free (once);
1000		1679
1001	cb (revents, arg);	1680	cb (revents, arg);
1002	}	1681	}
1003		1682
1004	static void	1683	static void
1005	once_cb_io (struct ev_io *w, int revents)	1684	once_cb_io (EV_P_ struct ev_io *w, int revents)
1006	{	1685	{
1007	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1686	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1008	}	1687	}
1009		1688
1010	static void	1689	static void
1011	once_cb_to (struct ev_timer *w, int revents)	1690	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1012	{	1691	{
1013	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1692	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1014	}	1693	}
1015		1694
1016	void	1695	void
1017	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1696	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1018	{	1697	{
1019	struct ev_once *once = malloc (sizeof (struct ev_once));	1698	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1020		1699
1021	if (!once)	1700	if (expect_false (!once))
1022	cb (EV_ERROR, arg);	1701	{
1023	else	1702	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1703	return;
1024	{	1704	}
		1705
1025	once->cb = cb;	1706	once->cb = cb;
1026	once->arg = arg;	1707	once->arg = arg;
1027		1708
1028	ev_watcher_init (&once->io, once_cb_io);	1709	ev_init (&once->io, once_cb_io);
1029
1030	if (fd >= 0)	1710	if (fd >= 0)
1031	{	1711	{
1032	ev_io_set (&once->io, fd, events);	1712	ev_io_set (&once->io, fd, events);
1033	ev_io_start (&once->io);	1713	ev_io_start (EV_A_ &once->io);
1034	}	1714	}
1035		1715
1036	ev_watcher_init (&once->to, once_cb_to);	1716	ev_init (&once->to, once_cb_to);
1037
1038	if (timeout >= 0.)	1717	if (timeout >= 0.)
1039	{	1718	{
1040	ev_timer_set (&once->to, timeout, 0.);	1719	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1720	ev_timer_start (EV_A_ &once->to);
1042	}
1043	}
1044	}
1045
1046	/*****************************************************************************/
1047
1048	#if 0
1049
1050	struct ev_io wio;
1051
1052	static void
1053	sin_cb (struct ev_io *w, int revents)
1054	{
1055	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056	}
1057
1058	static void
1059	ocb (struct ev_timer *w, int revents)
1060	{
1061	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062	ev_timer_stop (w);
1063	ev_timer_start (w);
1064	}
1065
1066	static void
1067	scb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070	ev_io_stop (&wio);
1071	ev_io_start (&wio);
1072	}
1073
1074	static void
1075	gcb (struct ev_signal *w, int revents)
1076	{
1077	fprintf (stderr, "generic %x\n", revents);
1078
1079	}
1080
1081	int main (void)
1082	{
1083	ev_init (0);
1084
1085	ev_io_init (&wio, sin_cb, 0, EV_READ);
1086	ev_io_start (&wio);
1087
1088	struct ev_timer t[10000];
1089
1090	#if 0
1091	int i;
1092	for (i = 0; i < 10000; ++i)
1093	{	1721	}
1094	struct ev_timer *w = t + i;
1095	ev_watcher_init (w, ocb, i);
1096	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097	ev_timer_start (w);
1098	if (drand48 () < 0.5)
1099	ev_timer_stop (w);
1100	}
1101	#endif
1102
1103	struct ev_timer t1;
1104	ev_timer_init (&t1, ocb, 5, 10);
1105	ev_timer_start (&t1);
1106
1107	struct ev_signal sig;
1108	ev_signal_init (&sig, scb, SIGQUIT);
1109	ev_signal_start (&sig);
1110
1111	struct ev_check cw;
1112	ev_check_init (&cw, gcb);
1113	ev_check_start (&cw);
1114
1115	struct ev_idle iw;
1116	ev_idle_init (&iw, gcb);
1117	ev_idle_start (&iw);
1118
1119	ev_loop (0);
1120
1121	return 0;
1122	}	1722	}
1123		1723
		1724	#ifdef __cplusplus
		1725	}
1124	#endif	1726	#endif
1125		1727
1126
1127
1128

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Comparing libev/ev.c (file contents): Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs. Revision 1.132 by root, Fri Nov 23 10:36:30 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs.
Revision 1.132 by root, Fri Nov 23 10:36:30 2007 UTC