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Comparing libev/ev.c (file contents):
Revision 1.34 by root, Thu Nov 1 11:43:11 2007 UTC vs.
Revision 1.193 by root, Sat Dec 22 05:47:58 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
29	#if EV_USE_CONFIG_H	37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
30	# include "config.h"	40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_NANOSLEEP
		60	# if HAVE_NANOSLEEP
		61	# define EV_USE_NANOSLEEP 1
		62	# else
		63	# define EV_USE_NANOSLEEP 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_SELECT
		68	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		69	# define EV_USE_SELECT 1
		70	# else
		71	# define EV_USE_SELECT 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_POLL
		76	# if HAVE_POLL && HAVE_POLL_H
		77	# define EV_USE_POLL 1
		78	# else
		79	# define EV_USE_POLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_EPOLL
		84	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		85	# define EV_USE_EPOLL 1
		86	# else
		87	# define EV_USE_EPOLL 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_KQUEUE
		92	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		93	# define EV_USE_KQUEUE 1
		94	# else
		95	# define EV_USE_KQUEUE 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_PORT
		100	# if HAVE_PORT_H && HAVE_PORT_CREATE
		101	# define EV_USE_PORT 1
		102	# else
		103	# define EV_USE_PORT 0
		104	# endif
		105	# endif
		106
		107	# ifndef EV_USE_INOTIFY
		108	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		109	# define EV_USE_INOTIFY 1
		110	# else
		111	# define EV_USE_INOTIFY 0
		112	# endif
		113	# endif
		114
31	#endif	115	#endif
32		116
33	#include <math.h>	117	#include <math.h>
34	#include <stdlib.h>	118	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	119	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	120	#include <stddef.h>
39		121
40	#include <stdio.h>	122	#include <stdio.h>
41		123
42	#include <assert.h>	124	#include <assert.h>
43	#include <errno.h>	125	#include <errno.h>
44	#include <sys/types.h>	126	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	127	#include <time.h>
48		128
		129	#include <signal.h>
		130
		131	#ifdef EV_H
		132	# include EV_H
		133	#else
		134	# include "ev.h"
		135	#endif
		136
		137	#ifndef _WIN32
		138	# include <sys/time.h>
		139	# include <sys/wait.h>
		140	# include <unistd.h>
		141	#else
		142	# define WIN32_LEAN_AND_MEAN
		143	# include <windows.h>
		144	# ifndef EV_SELECT_IS_WINSOCKET
		145	# define EV_SELECT_IS_WINSOCKET 1
		146	# endif
		147	#endif
		148
		149	/**/
		150
49	#ifndef EV_USE_MONOTONIC	151	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	152	# define EV_USE_MONOTONIC 0
52	# endif	153	#endif
		154
		155	#ifndef EV_USE_REALTIME
		156	# define EV_USE_REALTIME 0
		157	#endif
		158
		159	#ifndef EV_USE_NANOSLEEP
		160	# define EV_USE_NANOSLEEP 0
53	#endif	161	#endif
54		162
55	#ifndef EV_USE_SELECT	163	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	164	# define EV_USE_SELECT 1
57	#endif	165	#endif
58		166
		167	#ifndef EV_USE_POLL
		168	# ifdef _WIN32
		169	# define EV_USE_POLL 0
		170	# else
		171	# define EV_USE_POLL 1
		172	# endif
		173	#endif
		174
59	#ifndef EV_USE_EPOLL	175	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	176	# define EV_USE_EPOLL 0
61	#endif	177	#endif
62		178
		179	#ifndef EV_USE_KQUEUE
		180	# define EV_USE_KQUEUE 0
		181	#endif
		182
		183	#ifndef EV_USE_PORT
		184	# define EV_USE_PORT 0
		185	#endif
		186
		187	#ifndef EV_USE_INOTIFY
		188	# define EV_USE_INOTIFY 0
		189	#endif
		190
		191	#ifndef EV_PID_HASHSIZE
		192	# if EV_MINIMAL
		193	# define EV_PID_HASHSIZE 1
		194	# else
		195	# define EV_PID_HASHSIZE 16
		196	# endif
		197	#endif
		198
		199	#ifndef EV_INOTIFY_HASHSIZE
		200	# if EV_MINIMAL
		201	# define EV_INOTIFY_HASHSIZE 1
		202	# else
		203	# define EV_INOTIFY_HASHSIZE 16
		204	# endif
		205	#endif
		206
		207	/**/
		208
		209	#ifndef CLOCK_MONOTONIC
		210	# undef EV_USE_MONOTONIC
		211	# define EV_USE_MONOTONIC 0
		212	#endif
		213
63	#ifndef CLOCK_REALTIME	214	#ifndef CLOCK_REALTIME
		215	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	216	# define EV_USE_REALTIME 0
65	#endif	217	#endif
66	#ifndef EV_USE_REALTIME	218
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	219	#if !EV_STAT_ENABLE
		220	# undef EV_USE_INOTIFY
		221	# define EV_USE_INOTIFY 0
		222	#endif
		223
		224	#if !EV_USE_NANOSLEEP
		225	# ifndef _WIN32
		226	# include <sys/select.h>
68	#endif	227	# endif
		228	#endif
		229
		230	#if EV_USE_INOTIFY
		231	# include <sys/inotify.h>
		232	#endif
		233
		234	#if EV_SELECT_IS_WINSOCKET
		235	# include <winsock.h>
		236	#endif
		237
		238	/**/
		239
		240	/*
		241	* This is used to avoid floating point rounding problems.
		242	* It is added to ev_rt_now when scheduling periodics
		243	* to ensure progress, time-wise, even when rounding
		244	* errors are against us.
		245	* This value is good at least till the year 4000.
		246	* Better solutions welcome.
		247	*/
		248	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
69		249
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	250	#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) */	251	#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 */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	252	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
74		253
75	#include "ev.h"	254	#if __GNUC__ >= 4
		255	# define expect(expr,value) __builtin_expect ((expr),(value))
		256	# define noinline __attribute__ ((noinline))
		257	#else
		258	# define expect(expr,value) (expr)
		259	# define noinline
		260	# if __STDC_VERSION__ < 199901L
		261	# define inline
		262	# endif
		263	#endif
76		264
		265	#define expect_false(expr) expect ((expr) != 0, 0)
		266	#define expect_true(expr) expect ((expr) != 0, 1)
		267	#define inline_size static inline
		268
		269	#if EV_MINIMAL
		270	# define inline_speed static noinline
		271	#else
		272	# define inline_speed static inline
		273	#endif
		274
		275	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		276	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		277
		278	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		279	#define EMPTY2(a,b) /* used to suppress some warnings */
		280
77	typedef struct ev_watcher *W;	281	typedef ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	282	typedef ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	283	typedef ev_watcher_time *WT;
80		284
81	static ev_tstamp now, diff; /* monotonic clock */	285	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		286
		287	#ifdef _WIN32
		288	# include "ev_win32.c"
		289	#endif
		290
		291	/*****************************************************************************/
		292
		293	static void (*syserr_cb)(const char *msg);
		294
		295	void
		296	ev_set_syserr_cb (void (*cb)(const char *msg))
		297	{
		298	syserr_cb = cb;
		299	}
		300
		301	static void noinline
		302	syserr (const char *msg)
		303	{
		304	if (!msg)
		305	msg = "(libev) system error";
		306
		307	if (syserr_cb)
		308	syserr_cb (msg);
		309	else
		310	{
		311	perror (msg);
		312	abort ();
		313	}
		314	}
		315
		316	static void *(*alloc)(void *ptr, long size);
		317
		318	void
		319	ev_set_allocator (void *(*cb)(void *ptr, long size))
		320	{
		321	alloc = cb;
		322	}
		323
		324	inline_speed void *
		325	ev_realloc (void *ptr, long size)
		326	{
		327	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		328
		329	if (!ptr && size)
		330	{
		331	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		332	abort ();
		333	}
		334
		335	return ptr;
		336	}
		337
		338	#define ev_malloc(size) ev_realloc (0, (size))
		339	#define ev_free(ptr) ev_realloc ((ptr), 0)
		340
		341	/*****************************************************************************/
		342
		343	typedef struct
		344	{
		345	WL head;
		346	unsigned char events;
		347	unsigned char reify;
		348	#if EV_SELECT_IS_WINSOCKET
		349	SOCKET handle;
		350	#endif
		351	} ANFD;
		352
		353	typedef struct
		354	{
		355	W w;
		356	int events;
		357	} ANPENDING;
		358
		359	#if EV_USE_INOTIFY
		360	typedef struct
		361	{
		362	WL head;
		363	} ANFS;
		364	#endif
		365
		366	#if EV_MULTIPLICITY
		367
		368	struct ev_loop
		369	{
		370	ev_tstamp ev_rt_now;
		371	#define ev_rt_now ((loop)->ev_rt_now)
		372	#define VAR(name,decl) decl;
		373	#include "ev_vars.h"
		374	#undef VAR
		375	};
		376	#include "ev_wrap.h"
		377
		378	static struct ev_loop default_loop_struct;
		379	struct ev_loop *ev_default_loop_ptr;
		380
		381	#else
		382
82	ev_tstamp ev_now;	383	ev_tstamp ev_rt_now;
83	int ev_method;	384	#define VAR(name,decl) static decl;
		385	#include "ev_vars.h"
		386	#undef VAR
84		387
85	static int have_monotonic; /* runtime */	388	static int ev_default_loop_ptr;
86		389
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	390	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		391
91	/*****************************************************************************/	392	/*****************************************************************************/
92		393
93	ev_tstamp	394	ev_tstamp
94	ev_time (void)	395	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	403	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	404	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	405	#endif
105	}	406	}
106		407
107	static ev_tstamp	408	ev_tstamp inline_size
108	get_clock (void)	409	get_clock (void)
109	{	410	{
110	#if EV_USE_MONOTONIC	411	#if EV_USE_MONOTONIC
111	if (have_monotonic)	412	if (expect_true (have_monotonic))
112	{	413	{
113	struct timespec ts;	414	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	415	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	416	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	417	}
117	#endif	418	#endif
118		419
119	return ev_time ();	420	return ev_time ();
120	}	421	}
121		422
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	423	#if EV_MULTIPLICITY
		424	ev_tstamp
		425	ev_now (EV_P)
		426	{
		427	return ev_rt_now;
		428	}
		429	#endif
123		430
124	#define array_needsize(base,cur,cnt,init) \	431	void
125	if ((cnt) > cur) \	432	ev_sleep (ev_tstamp delay)
126	{ \	433	{
127	int newcnt = cur; \	434	if (delay > 0.)
128	do \
129	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \
131	} \
132	while ((cnt) > newcnt); \
133	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \
135	init (base + cur, newcnt - cur); \
136	cur = newcnt; \
137	}	435	{
		436	#if EV_USE_NANOSLEEP
		437	struct timespec ts;
		438
		439	ts.tv_sec = (time_t)delay;
		440	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		441
		442	nanosleep (&ts, 0);
		443	#elif defined(_WIN32)
		444	Sleep (delay * 1e3);
		445	#else
		446	struct timeval tv;
		447
		448	tv.tv_sec = (time_t)delay;
		449	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		450
		451	select (0, 0, 0, 0, &tv);
		452	#endif
		453	}
		454	}
138		455
139	/*****************************************************************************/	456	/*****************************************************************************/
140		457
141	typedef struct	458	int inline_size
		459	array_nextsize (int elem, int cur, int cnt)
142	{	460	{
143	struct ev_io *head;	461	int ncur = cur + 1;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147		462
148	static ANFD *anfds;	463	do
149	static int anfdmax;	464	ncur <<= 1;
		465	while (cnt > ncur);
150		466
151	static void	467	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		468	if (elem * ncur > 4096)
		469	{
		470	ncur *= elem;
		471	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		472	ncur = ncur - sizeof (void *) * 4;
		473	ncur /= elem;
		474	}
		475
		476	return ncur;
		477	}
		478
		479	static noinline void *
		480	array_realloc (int elem, void *base, int *cur, int cnt)
		481	{
		482	*cur = array_nextsize (elem, *cur, cnt);
		483	return ev_realloc (base, elem * *cur);
		484	}
		485
		486	#define array_needsize(type,base,cur,cnt,init) \
		487	if (expect_false ((cnt) > (cur))) \
		488	{ \
		489	int ocur_ = (cur); \
		490	(base) = (type *)array_realloc \
		491	(sizeof (type), (base), &(cur), (cnt)); \
		492	init ((base) + (ocur_), (cur) - ocur_); \
		493	}
		494
		495	#if 0
		496	#define array_slim(type,stem) \
		497	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		498	{ \
		499	stem ## max = array_roundsize (stem ## cnt >> 1); \
		500	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		501	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		502	}
		503	#endif
		504
		505	#define array_free(stem, idx) \
		506	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		507
		508	/*****************************************************************************/
		509
		510	void noinline
		511	ev_feed_event (EV_P_ void *w, int revents)
		512	{
		513	W w_ = (W)w;
		514	int pri = ABSPRI (w_);
		515
		516	if (expect_false (w_->pending))
		517	pendings [pri][w_->pending - 1].events |= revents;
		518	else
		519	{
		520	w_->pending = ++pendingcnt [pri];
		521	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		522	pendings [pri][w_->pending - 1].w = w_;
		523	pendings [pri][w_->pending - 1].events = revents;
		524	}
		525	}
		526
		527	void inline_speed
		528	queue_events (EV_P_ W *events, int eventcnt, int type)
		529	{
		530	int i;
		531
		532	for (i = 0; i < eventcnt; ++i)
		533	ev_feed_event (EV_A_ events [i], type);
		534	}
		535
		536	/*****************************************************************************/
		537
		538	void inline_size
152	anfds_init (ANFD *base, int count)	539	anfds_init (ANFD *base, int count)
153	{	540	{
154	while (count--)	541	while (count--)
155	{	542	{
156	base->head = 0;	543	base->head = 0;
…		…
159		546
160	++base;	547	++base;
161	}	548	}
162	}	549	}
163		550
164	typedef struct	551	void inline_speed
165	{
166	W w;
167	int events;
168	} ANPENDING;
169
170	static ANPENDING *pendings;
171	static int pendingmax, pendingcnt;
172
173	static void
174	event (W w, int events)
175	{
176	if (w->pending)
177	{
178	pendings [w->pending - 1].events |= events;
179	return;
180	}
181
182	w->pending = ++pendingcnt;
183	array_needsize (pendings, pendingmax, pendingcnt, );
184	pendings [pendingcnt - 1].w = w;
185	pendings [pendingcnt - 1].events = events;
186	}
187
188	static void
189	queue_events (W *events, int eventcnt, int type)
190	{
191	int i;
192
193	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);
195	}
196
197	static void
198	fd_event (int fd, int events)	552	fd_event (EV_P_ int fd, int revents)
199	{	553	{
200	ANFD *anfd = anfds + fd;	554	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	555	ev_io *w;
202		556
203	for (w = anfd->head; w; w = w->next)	557	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
204	{	558	{
205	int ev = w->events & events;	559	int ev = w->events & revents;
206		560
207	if (ev)	561	if (ev)
208	event ((W)w, ev);	562	ev_feed_event (EV_A_ (W)w, ev);
209	}	563	}
210	}	564	}
211		565
212	/*****************************************************************************/	566	void
		567	ev_feed_fd_event (EV_P_ int fd, int revents)
		568	{
		569	if (fd >= 0 && fd < anfdmax)
		570	fd_event (EV_A_ fd, revents);
		571	}
213		572
214	static int *fdchanges;	573	void inline_size
215	static int fdchangemax, fdchangecnt;	574	fd_reify (EV_P)
216
217	static void
218	fd_reify (void)
219	{	575	{
220	int i;	576	int i;
221		577
222	for (i = 0; i < fdchangecnt; ++i)	578	for (i = 0; i < fdchangecnt; ++i)
223	{	579	{
224	int fd = fdchanges [i];	580	int fd = fdchanges [i];
225	ANFD *anfd = anfds + fd;	581	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	582	ev_io *w;
227		583
228	int events = 0;	584	unsigned char events = 0;
229		585
230	for (w = anfd->head; w; w = w->next)	586	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
231	events |= w->events;	587	events |= (unsigned char)w->events;
232		588
233	anfd->reify = 0;	589	#if EV_SELECT_IS_WINSOCKET
234		590	if (events)
235	if (anfd->events != events)
236	{	591	{
237	method_modify (fd, anfd->events, events);	592	unsigned long argp;
238	anfd->events = events;	593	anfd->handle = _get_osfhandle (fd);
		594	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
239	}	595	}
		596	#endif
		597
		598	{
		599	unsigned char o_events = anfd->events;
		600	unsigned char o_reify = anfd->reify;
		601
		602	anfd->reify = 0;
		603	anfd->events = events;
		604
		605	if (o_events != events || o_reify & EV_IOFDSET)
		606	backend_modify (EV_A_ fd, o_events, events);
		607	}
240	}	608	}
241		609
242	fdchangecnt = 0;	610	fdchangecnt = 0;
243	}	611	}
244		612
245	static void	613	void inline_size
246	fd_change (int fd)	614	fd_change (EV_P_ int fd, int flags)
247	{	615	{
248	if (anfds [fd].reify || fdchangecnt < 0)	616	unsigned char reify = anfds [fd].reify;
249	return;
250
251	anfds [fd].reify = 1;	617	anfds [fd].reify |= flags;
252		618
		619	if (expect_true (!reify))
		620	{
253	++fdchangecnt;	621	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	622	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
255	fdchanges [fdchangecnt - 1] = fd;	623	fdchanges [fdchangecnt - 1] = fd;
		624	}
		625	}
		626
		627	void inline_speed
		628	fd_kill (EV_P_ int fd)
		629	{
		630	ev_io *w;
		631
		632	while ((w = (ev_io *)anfds [fd].head))
		633	{
		634	ev_io_stop (EV_A_ w);
		635	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		636	}
		637	}
		638
		639	int inline_size
		640	fd_valid (int fd)
		641	{
		642	#ifdef _WIN32
		643	return _get_osfhandle (fd) != -1;
		644	#else
		645	return fcntl (fd, F_GETFD) != -1;
		646	#endif
256	}	647	}
257		648
258	/* called on EBADF to verify fds */	649	/* called on EBADF to verify fds */
259	static void	650	static void noinline
260	fd_recheck (void)	651	fd_ebadf (EV_P)
261	{	652	{
262	int fd;	653	int fd;
263		654
264	for (fd = 0; fd < anfdmax; ++fd)	655	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	656	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	657	if (!fd_valid (fd) == -1 && errno == EBADF)
267	while (anfds [fd].head)	658	fd_kill (EV_A_ fd);
		659	}
		660
		661	/* called on ENOMEM in select/poll to kill some fds and retry */
		662	static void noinline
		663	fd_enomem (EV_P)
		664	{
		665	int fd;
		666
		667	for (fd = anfdmax; fd--; )
		668	if (anfds [fd].events)
268	{	669	{
269	ev_io_stop (anfds [fd].head);	670	fd_kill (EV_A_ fd);
270	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	671	return;
271	}	672	}
		673	}
		674
		675	/* usually called after fork if backend needs to re-arm all fds from scratch */
		676	static void noinline
		677	fd_rearm_all (EV_P)
		678	{
		679	int fd;
		680
		681	for (fd = 0; fd < anfdmax; ++fd)
		682	if (anfds [fd].events)
		683	{
		684	anfds [fd].events = 0;
		685	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		686	}
272	}	687	}
273		688
274	/*****************************************************************************/	689	/*****************************************************************************/
275		690
276	static struct ev_timer **timers;	691	void inline_speed
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void
283	upheap (WT *timers, int k)	692	upheap (WT *heap, int k)
284	{	693	{
285	WT w = timers [k];	694	WT w = heap [k];
286		695
287	while (k && timers [k >> 1]->at > w->at)	696	while (k)
288	{
289	timers [k] = timers [k >> 1];
290	timers [k]->active = k + 1;
291	k >>= 1;
292	}	697	{
293
294	timers [k] = w;
295	timers [k]->active = k + 1;
296
297	}
298
299	static void
300	downheap (WT *timers, int N, int k)
301	{
302	WT w = timers [k];
303
304	while (k < (N >> 1))
305	{
306	int j = k << 1;	698	int p = (k - 1) >> 1;
307		699
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	700	if (heap [p]->at <= w->at)
309	++j;
310
311	if (w->at <= timers [j]->at)
312	break;	701	break;
313		702
314	timers [k] = timers [j];	703	heap [k] = heap [p];
315	timers [k]->active = k + 1;	704	((W)heap [k])->active = k + 1;
316	k = j;	705	k = p;
		706	}
		707
		708	heap [k] = w;
		709	((W)heap [k])->active = k + 1;
		710	}
		711
		712	void inline_speed
		713	downheap (WT *heap, int N, int k)
		714	{
		715	WT w = heap [k];
		716
		717	for (;;)
317	}	718	{
		719	int c = (k << 1) + 1;
318		720
		721	if (c >= N)
		722	break;
		723
		724	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		725	? 1 : 0;
		726
		727	if (w->at <= heap [c]->at)
		728	break;
		729
		730	heap [k] = heap [c];
		731	((W)heap [k])->active = k + 1;
		732
		733	k = c;
		734	}
		735
319	timers [k] = w;	736	heap [k] = w;
320	timers [k]->active = k + 1;	737	((W)heap [k])->active = k + 1;
		738	}
		739
		740	void inline_size
		741	adjustheap (WT *heap, int N, int k)
		742	{
		743	upheap (heap, k);
		744	downheap (heap, N, k);
321	}	745	}
322		746
323	/*****************************************************************************/	747	/*****************************************************************************/
324		748
325	typedef struct	749	typedef struct
326	{	750	{
327	struct ev_signal *head;	751	WL head;
328	sig_atomic_t volatile gotsig;	752	sig_atomic_t volatile gotsig;
329	} ANSIG;	753	} ANSIG;
330		754
331	static ANSIG *signals;	755	static ANSIG *signals;
332	static int signalmax;	756	static int signalmax;
333		757
334	static int sigpipe [2];	758	static int sigpipe [2];
335	static sig_atomic_t volatile gotsig;	759	static sig_atomic_t volatile gotsig;
336	static struct ev_io sigev;	760	static ev_io sigev;
337		761
338	static void	762	void inline_size
339	signals_init (ANSIG *base, int count)	763	signals_init (ANSIG *base, int count)
340	{	764	{
341	while (count--)	765	while (count--)
342	{	766	{
343	base->head = 0;	767	base->head = 0;
…		…
348	}	772	}
349		773
350	static void	774	static void
351	sighandler (int signum)	775	sighandler (int signum)
352	{	776	{
		777	#if _WIN32
		778	signal (signum, sighandler);
		779	#endif
		780
353	signals [signum - 1].gotsig = 1;	781	signals [signum - 1].gotsig = 1;
354		782
355	if (!gotsig)	783	if (!gotsig)
356	{	784	{
		785	int old_errno = errno;
357	gotsig = 1;	786	gotsig = 1;
358	write (sigpipe [1], &signum, 1);	787	write (sigpipe [1], &signum, 1);
		788	errno = old_errno;
359	}	789	}
		790	}
		791
		792	void noinline
		793	ev_feed_signal_event (EV_P_ int signum)
		794	{
		795	WL w;
		796
		797	#if EV_MULTIPLICITY
		798	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		799	#endif
		800
		801	--signum;
		802
		803	if (signum < 0 || signum >= signalmax)
		804	return;
		805
		806	signals [signum].gotsig = 0;
		807
		808	for (w = signals [signum].head; w; w = w->next)
		809	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
360	}	810	}
361		811
362	static void	812	static void
363	sigcb (struct ev_io *iow, int revents)	813	sigcb (EV_P_ ev_io *iow, int revents)
364	{	814	{
365	struct ev_signal *w;
366	int sig;	815	int signum;
367		816
368	read (sigpipe [0], &revents, 1);	817	read (sigpipe [0], &revents, 1);
369	gotsig = 0;	818	gotsig = 0;
370		819
371	for (sig = signalmax; sig--; )	820	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	821	if (signals [signum].gotsig)
		822	ev_feed_signal_event (EV_A_ signum + 1);
		823	}
		824
		825	void inline_speed
		826	fd_intern (int fd)
		827	{
		828	#ifdef _WIN32
		829	int arg = 1;
		830	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		831	#else
		832	fcntl (fd, F_SETFD, FD_CLOEXEC);
		833	fcntl (fd, F_SETFL, O_NONBLOCK);
		834	#endif
		835	}
		836
		837	static void noinline
		838	siginit (EV_P)
		839	{
		840	fd_intern (sigpipe [0]);
		841	fd_intern (sigpipe [1]);
		842
		843	ev_io_set (&sigev, sigpipe [0], EV_READ);
		844	ev_io_start (EV_A_ &sigev);
		845	ev_unref (EV_A); /* child watcher should not keep loop alive */
		846	}
		847
		848	/*****************************************************************************/
		849
		850	static WL childs [EV_PID_HASHSIZE];
		851
		852	#ifndef _WIN32
		853
		854	static ev_signal childev;
		855
		856	void inline_speed
		857	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		858	{
		859	ev_child *w;
		860
		861	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		862	if (w->pid == pid || !w->pid)
373	{	863	{
374	signals [sig].gotsig = 0;	864	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
375		865	w->rpid = pid;
376	for (w = signals [sig].head; w; w = w->next)	866	w->rstatus = status;
377	event ((W)w, EV_SIGNAL);	867	ev_feed_event (EV_A_ (W)w, EV_CHILD);
378	}	868	}
379	}	869	}
380
381	static void
382	siginit (void)
383	{
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386
387	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
390
391	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);
393	}
394
395	/*****************************************************************************/
396
397	static struct ev_idle **idles;
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407
408	static struct ev_child *childs [PID_HASHSIZE];
409	static struct ev_signal childev;
410		870
411	#ifndef WCONTINUED	871	#ifndef WCONTINUED
412	# define WCONTINUED 0	872	# define WCONTINUED 0
413	#endif	873	#endif
414		874
415	static void	875	static void
416	childcb (struct ev_signal *sw, int revents)	876	childcb (EV_P_ ev_signal *sw, int revents)
417	{	877	{
418	struct ev_child *w;
419	int pid, status;	878	int pid, status;
420		879
		880	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
421	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	881	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	882	if (!WCONTINUED
423	if (w->pid == pid || w->pid == -1)	883	|| errno != EINVAL
424	{	884	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
425	w->status = status;	885	return;
426	event ((W)w, EV_CHILD);	886
427	}	887	/* make sure we are called again until all childs have been reaped */
		888	/* we need to do it this way so that the callback gets called before we continue */
		889	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		890
		891	child_reap (EV_A_ sw, pid, pid, status);
		892	if (EV_PID_HASHSIZE > 1)
		893	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
428	}	894	}
		895
		896	#endif
429		897
430	/*****************************************************************************/	898	/*****************************************************************************/
431		899
		900	#if EV_USE_PORT
		901	# include "ev_port.c"
		902	#endif
		903	#if EV_USE_KQUEUE
		904	# include "ev_kqueue.c"
		905	#endif
432	#if EV_USE_EPOLL	906	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	907	# include "ev_epoll.c"
434	#endif	908	#endif
		909	#if EV_USE_POLL
		910	# include "ev_poll.c"
		911	#endif
435	#if EV_USE_SELECT	912	#if EV_USE_SELECT
436	# include "ev_select.c"	913	# include "ev_select.c"
437	#endif	914	#endif
438		915
439	int	916	int
…		…
446	ev_version_minor (void)	923	ev_version_minor (void)
447	{	924	{
448	return EV_VERSION_MINOR;	925	return EV_VERSION_MINOR;
449	}	926	}
450		927
451	int ev_init (int flags)	928	/* return true if we are running with elevated privileges and should ignore env variables */
		929	int inline_size
		930	enable_secure (void)
452	{	931	{
453	if (!ev_method)	932	#ifdef _WIN32
		933	return 0;
		934	#else
		935	return getuid () != geteuid ()
		936	|| getgid () != getegid ();
		937	#endif
		938	}
		939
		940	unsigned int
		941	ev_supported_backends (void)
		942	{
		943	unsigned int flags = 0;
		944
		945	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		946	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		947	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		948	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		949	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		950
		951	return flags;
		952	}
		953
		954	unsigned int
		955	ev_recommended_backends (void)
		956	{
		957	unsigned int flags = ev_supported_backends ();
		958
		959	#ifndef __NetBSD__
		960	/* kqueue is borked on everything but netbsd apparently */
		961	/* it usually doesn't work correctly on anything but sockets and pipes */
		962	flags &= ~EVBACKEND_KQUEUE;
		963	#endif
		964	#ifdef __APPLE__
		965	// flags &= ~EVBACKEND_KQUEUE; for documentation
		966	flags &= ~EVBACKEND_POLL;
		967	#endif
		968
		969	return flags;
		970	}
		971
		972	unsigned int
		973	ev_embeddable_backends (void)
		974	{
		975	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		976	return EVBACKEND_KQUEUE
		977	| EVBACKEND_PORT;
		978	}
		979
		980	unsigned int
		981	ev_backend (EV_P)
		982	{
		983	return backend;
		984	}
		985
		986	unsigned int
		987	ev_loop_count (EV_P)
		988	{
		989	return loop_count;
		990	}
		991
		992	void
		993	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		994	{
		995	io_blocktime = interval;
		996	}
		997
		998	void
		999	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1000	{
		1001	timeout_blocktime = interval;
		1002	}
		1003
		1004	static void noinline
		1005	loop_init (EV_P_ unsigned int flags)
		1006	{
		1007	if (!backend)
454	{	1008	{
455	#if EV_USE_MONOTONIC	1009	#if EV_USE_MONOTONIC
456	{	1010	{
457	struct timespec ts;	1011	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1012	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	1013	have_monotonic = 1;
460	}	1014	}
461	#endif	1015	#endif
462		1016
463	ev_now = ev_time ();	1017	ev_rt_now = ev_time ();
464	now = get_clock ();	1018	mn_now = get_clock ();
		1019	now_floor = mn_now;
465	diff = ev_now - now;	1020	rtmn_diff = ev_rt_now - mn_now;
466		1021
467	if (pipe (sigpipe))	1022	io_blocktime = 0.;
468	return 0;	1023	timeout_blocktime = 0.;
469		1024
470	ev_method = EVMETHOD_NONE;	1025	/* pid check not overridable via env */
		1026	#ifndef _WIN32
		1027	if (flags & EVFLAG_FORKCHECK)
		1028	curpid = getpid ();
		1029	#endif
		1030
		1031	if (!(flags & EVFLAG_NOENV)
		1032	&& !enable_secure ()
		1033	&& getenv ("LIBEV_FLAGS"))
		1034	flags = atoi (getenv ("LIBEV_FLAGS"));
		1035
		1036	if (!(flags & 0x0000ffffUL))
		1037	flags |= ev_recommended_backends ();
		1038
		1039	backend = 0;
		1040	backend_fd = -1;
		1041	#if EV_USE_INOTIFY
		1042	fs_fd = -2;
		1043	#endif
		1044
		1045	#if EV_USE_PORT
		1046	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1047	#endif
		1048	#if EV_USE_KQUEUE
		1049	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1050	#endif
471	#if EV_USE_EPOLL	1051	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	1052	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1053	#endif
		1054	#if EV_USE_POLL
		1055	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
473	#endif	1056	#endif
474	#if EV_USE_SELECT	1057	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	1058	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
476	#endif	1059	#endif
477		1060
478	if (ev_method)	1061	ev_init (&sigev, sigcb);
		1062	ev_set_priority (&sigev, EV_MAXPRI);
		1063	}
		1064	}
		1065
		1066	static void noinline
		1067	loop_destroy (EV_P)
		1068	{
		1069	int i;
		1070
		1071	#if EV_USE_INOTIFY
		1072	if (fs_fd >= 0)
		1073	close (fs_fd);
		1074	#endif
		1075
		1076	if (backend_fd >= 0)
		1077	close (backend_fd);
		1078
		1079	#if EV_USE_PORT
		1080	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1081	#endif
		1082	#if EV_USE_KQUEUE
		1083	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1084	#endif
		1085	#if EV_USE_EPOLL
		1086	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1087	#endif
		1088	#if EV_USE_POLL
		1089	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1090	#endif
		1091	#if EV_USE_SELECT
		1092	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1093	#endif
		1094
		1095	for (i = NUMPRI; i--; )
		1096	{
		1097	array_free (pending, [i]);
		1098	#if EV_IDLE_ENABLE
		1099	array_free (idle, [i]);
		1100	#endif
		1101	}
		1102
		1103	ev_free (anfds); anfdmax = 0;
		1104
		1105	/* have to use the microsoft-never-gets-it-right macro */
		1106	array_free (fdchange, EMPTY);
		1107	array_free (timer, EMPTY);
		1108	#if EV_PERIODIC_ENABLE
		1109	array_free (periodic, EMPTY);
		1110	#endif
		1111	#if EV_FORK_ENABLE
		1112	array_free (fork, EMPTY);
		1113	#endif
		1114	array_free (prepare, EMPTY);
		1115	array_free (check, EMPTY);
		1116
		1117	backend = 0;
		1118	}
		1119
		1120	void inline_size infy_fork (EV_P);
		1121
		1122	void inline_size
		1123	loop_fork (EV_P)
		1124	{
		1125	#if EV_USE_PORT
		1126	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1127	#endif
		1128	#if EV_USE_KQUEUE
		1129	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1130	#endif
		1131	#if EV_USE_EPOLL
		1132	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1133	#endif
		1134	#if EV_USE_INOTIFY
		1135	infy_fork (EV_A);
		1136	#endif
		1137
		1138	if (ev_is_active (&sigev))
		1139	{
		1140	/* default loop */
		1141
		1142	ev_ref (EV_A);
		1143	ev_io_stop (EV_A_ &sigev);
		1144	close (sigpipe [0]);
		1145	close (sigpipe [1]);
		1146
		1147	while (pipe (sigpipe))
		1148	syserr ("(libev) error creating pipe");
		1149
		1150	siginit (EV_A);
		1151	}
		1152
		1153	postfork = 0;
		1154	}
		1155
		1156	#if EV_MULTIPLICITY
		1157	struct ev_loop *
		1158	ev_loop_new (unsigned int flags)
		1159	{
		1160	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1161
		1162	memset (loop, 0, sizeof (struct ev_loop));
		1163
		1164	loop_init (EV_A_ flags);
		1165
		1166	if (ev_backend (EV_A))
		1167	return loop;
		1168
		1169	return 0;
		1170	}
		1171
		1172	void
		1173	ev_loop_destroy (EV_P)
		1174	{
		1175	loop_destroy (EV_A);
		1176	ev_free (loop);
		1177	}
		1178
		1179	void
		1180	ev_loop_fork (EV_P)
		1181	{
		1182	postfork = 1;
		1183	}
		1184
		1185	#endif
		1186
		1187	#if EV_MULTIPLICITY
		1188	struct ev_loop *
		1189	ev_default_loop_init (unsigned int flags)
		1190	#else
		1191	int
		1192	ev_default_loop (unsigned int flags)
		1193	#endif
		1194	{
		1195	if (sigpipe [0] == sigpipe [1])
		1196	if (pipe (sigpipe))
		1197	return 0;
		1198
		1199	if (!ev_default_loop_ptr)
		1200	{
		1201	#if EV_MULTIPLICITY
		1202	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1203	#else
		1204	ev_default_loop_ptr = 1;
		1205	#endif
		1206
		1207	loop_init (EV_A_ flags);
		1208
		1209	if (ev_backend (EV_A))
479	{	1210	{
480	ev_watcher_init (&sigev, sigcb);
481	siginit ();	1211	siginit (EV_A);
482		1212
		1213	#ifndef _WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	1214	ev_signal_init (&childev, childcb, SIGCHLD);
		1215	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	1216	ev_signal_start (EV_A_ &childev);
		1217	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1218	#endif
485	}	1219	}
		1220	else
		1221	ev_default_loop_ptr = 0;
486	}	1222	}
487		1223
488	return ev_method;	1224	return ev_default_loop_ptr;
		1225	}
		1226
		1227	void
		1228	ev_default_destroy (void)
		1229	{
		1230	#if EV_MULTIPLICITY
		1231	struct ev_loop *loop = ev_default_loop_ptr;
		1232	#endif
		1233
		1234	#ifndef _WIN32
		1235	ev_ref (EV_A); /* child watcher */
		1236	ev_signal_stop (EV_A_ &childev);
		1237	#endif
		1238
		1239	ev_ref (EV_A); /* signal watcher */
		1240	ev_io_stop (EV_A_ &sigev);
		1241
		1242	close (sigpipe [0]); sigpipe [0] = 0;
		1243	close (sigpipe [1]); sigpipe [1] = 0;
		1244
		1245	loop_destroy (EV_A);
		1246	}
		1247
		1248	void
		1249	ev_default_fork (void)
		1250	{
		1251	#if EV_MULTIPLICITY
		1252	struct ev_loop *loop = ev_default_loop_ptr;
		1253	#endif
		1254
		1255	if (backend)
		1256	postfork = 1;
489	}	1257	}
490		1258
491	/*****************************************************************************/	1259	/*****************************************************************************/
492		1260
493	void	1261	void
494	ev_prefork (void)	1262	ev_invoke (EV_P_ void *w, int revents)
495	{	1263	{
496	/* nop */	1264	EV_CB_INVOKE ((W)w, revents);
497	}	1265	}
498		1266
499	void	1267	void inline_speed
500	ev_postfork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_postfork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif
512
513	ev_io_stop (&sigev);
514	close (sigpipe [0]);
515	close (sigpipe [1]);
516	pipe (sigpipe);
517	siginit ();
518	}
519
520	/*****************************************************************************/
521
522	static void
523	call_pending (void)	1268	call_pending (EV_P)
524	{	1269	{
		1270	int pri;
		1271
		1272	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	1273	while (pendingcnt [pri])
526	{	1274	{
527	ANPENDING *p = pendings + --pendingcnt;	1275	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		1276
529	if (p->w)	1277	if (expect_true (p->w))
530	{	1278	{
		1279	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1280
531	p->w->pending = 0;	1281	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	1282	EV_CB_INVOKE (p->w, p->events);
533	}	1283	}
534	}	1284	}
535	}	1285	}
536		1286
537	static void	1287	void inline_size
538	timers_reify (void)	1288	timers_reify (EV_P)
539	{	1289	{
540	while (timercnt && timers [0]->at <= now)	1290	while (timercnt && ((WT)timers [0])->at <= mn_now)
541	{	1291	{
542	struct ev_timer *w = timers [0];	1292	ev_timer *w = (ev_timer *)timers [0];
		1293
		1294	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
543		1295
544	/* first reschedule or stop timer */	1296	/* first reschedule or stop timer */
545	if (w->repeat)	1297	if (w->repeat)
546	{	1298	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1299	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1300
548	w->at = now + w->repeat;	1301	((WT)w)->at += w->repeat;
		1302	if (((WT)w)->at < mn_now)
		1303	((WT)w)->at = mn_now;
		1304
549	downheap ((WT *)timers, timercnt, 0);	1305	downheap (timers, timercnt, 0);
550	}	1306	}
551	else	1307	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	1308	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		1309
554	event ((W)w, EV_TIMEOUT);	1310	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
555	}	1311	}
556	}	1312	}
557		1313
558	static void	1314	#if EV_PERIODIC_ENABLE
		1315	void inline_size
559	periodics_reify (void)	1316	periodics_reify (EV_P)
560	{	1317	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	1318	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
562	{	1319	{
563	struct ev_periodic *w = periodics [0];	1320	ev_periodic *w = (ev_periodic *)periodics [0];
		1321
		1322	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
564		1323
565	/* first reschedule or stop timer */	1324	/* first reschedule or stop timer */
566	if (w->interval)	1325	if (w->reschedule_cb)
567	{	1326	{
		1327	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1328	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1329	downheap (periodics, periodiccnt, 0);
		1330	}
		1331	else if (w->interval)
		1332	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1333	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1334	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1335	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	1336	downheap (periodics, periodiccnt, 0);
571	}	1337	}
572	else	1338	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	1339	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		1340
575	event ((W)w, EV_PERIODIC);	1341	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
576	}	1342	}
577	}	1343	}
578		1344
579	static void	1345	static void noinline
580	periodics_reschedule (ev_tstamp diff)	1346	periodics_reschedule (EV_P)
581	{	1347	{
582	int i;	1348	int i;
583		1349
584	/* adjust periodics after time jump */	1350	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	1351	for (i = 0; i < periodiccnt; ++i)
586	{	1352	{
587	struct ev_periodic *w = periodics [i];	1353	ev_periodic *w = (ev_periodic *)periodics [i];
588		1354
		1355	if (w->reschedule_cb)
		1356	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
589	if (w->interval)	1357	else if (w->interval)
		1358	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1359	}
		1360
		1361	/* now rebuild the heap */
		1362	for (i = periodiccnt >> 1; i--; )
		1363	downheap (periodics, periodiccnt, i);
		1364	}
		1365	#endif
		1366
		1367	#if EV_IDLE_ENABLE
		1368	void inline_size
		1369	idle_reify (EV_P)
		1370	{
		1371	if (expect_false (idleall))
		1372	{
		1373	int pri;
		1374
		1375	for (pri = NUMPRI; pri--; )
590	{	1376	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1377	if (pendingcnt [pri])
		1378	break;
592		1379
593	if (fabs (diff) >= 1e-4)	1380	if (idlecnt [pri])
594	{	1381	{
595	ev_periodic_stop (w);	1382	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
596	ev_periodic_start (w);	1383	break;
597
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */
599	}	1384	}
600	}	1385	}
601	}	1386	}
602	}	1387	}
		1388	#endif
603		1389
604	static void	1390	void inline_speed
605	time_update (void)	1391	time_update (EV_P_ ev_tstamp max_block)
606	{	1392	{
607	int i;	1393	int i;
608		1394
609	ev_now = ev_time ();	1395	#if EV_USE_MONOTONIC
610
611	if (have_monotonic)	1396	if (expect_true (have_monotonic))
612	{	1397	{
613	ev_tstamp odiff = diff;	1398	ev_tstamp odiff = rtmn_diff;
614		1399
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1400	mn_now = get_clock ();
		1401
		1402	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1403	/* interpolate in the meantime */
		1404	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
616	{	1405	{
617	now = get_clock ();	1406	ev_rt_now = rtmn_diff + mn_now;
		1407	return;
		1408	}
		1409
		1410	now_floor = mn_now;
		1411	ev_rt_now = ev_time ();
		1412
		1413	/* loop a few times, before making important decisions.
		1414	* on the choice of "4": one iteration isn't enough,
		1415	* in case we get preempted during the calls to
		1416	* ev_time and get_clock. a second call is almost guaranteed
		1417	* to succeed in that case, though. and looping a few more times
		1418	* doesn't hurt either as we only do this on time-jumps or
		1419	* in the unlikely event of having been preempted here.
		1420	*/
		1421	for (i = 4; --i; )
		1422	{
618	diff = ev_now - now;	1423	rtmn_diff = ev_rt_now - mn_now;
619		1424
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1425	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
621	return; /* all is well */	1426	return; /* all is well */
622		1427
623	ev_now = ev_time ();	1428	ev_rt_now = ev_time ();
		1429	mn_now = get_clock ();
		1430	now_floor = mn_now;
624	}	1431	}
625		1432
		1433	# if EV_PERIODIC_ENABLE
626	periodics_reschedule (diff - odiff);	1434	periodics_reschedule (EV_A);
		1435	# endif
627	/* no timer adjustment, as the monotonic clock doesn't jump */	1436	/* no timer adjustment, as the monotonic clock doesn't jump */
		1437	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
628	}	1438	}
629	else	1439	else
		1440	#endif
630	{	1441	{
631	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1442	ev_rt_now = ev_time ();
		1443
		1444	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
632	{	1445	{
		1446	#if EV_PERIODIC_ENABLE
633	periodics_reschedule (ev_now - now);	1447	periodics_reschedule (EV_A);
634		1448	#endif
635	/* adjust timers. this is easy, as the offset is the same for all */	1449	/* adjust timers. this is easy, as the offset is the same for all of them */
636	for (i = 0; i < timercnt; ++i)	1450	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	1451	((WT)timers [i])->at += ev_rt_now - mn_now;
638	}	1452	}
639		1453
640	now = ev_now;	1454	mn_now = ev_rt_now;
641	}	1455	}
642	}	1456	}
643		1457
644	int ev_loop_done;	1458	void
		1459	ev_ref (EV_P)
		1460	{
		1461	++activecnt;
		1462	}
645		1463
		1464	void
		1465	ev_unref (EV_P)
		1466	{
		1467	--activecnt;
		1468	}
		1469
		1470	static int loop_done;
		1471
		1472	void
646	void ev_loop (int flags)	1473	ev_loop (EV_P_ int flags)
647	{	1474	{
648	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1475	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1476	? EVUNLOOP_ONE
		1477	: EVUNLOOP_CANCEL;
		1478
		1479	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
650		1480
651	do	1481	do
652	{	1482	{
		1483	#ifndef _WIN32
		1484	if (expect_false (curpid)) /* penalise the forking check even more */
		1485	if (expect_false (getpid () != curpid))
		1486	{
		1487	curpid = getpid ();
		1488	postfork = 1;
		1489	}
		1490	#endif
		1491
		1492	#if EV_FORK_ENABLE
		1493	/* we might have forked, so queue fork handlers */
		1494	if (expect_false (postfork))
		1495	if (forkcnt)
		1496	{
		1497	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1498	call_pending (EV_A);
		1499	}
		1500	#endif
		1501
653	/* queue check watchers (and execute them) */	1502	/* queue prepare watchers (and execute them) */
654	if (preparecnt)	1503	if (expect_false (preparecnt))
655	{	1504	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1505	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	1506	call_pending (EV_A);
658	}	1507	}
659		1508
		1509	if (expect_false (!activecnt))
		1510	break;
		1511
		1512	/* we might have forked, so reify kernel state if necessary */
		1513	if (expect_false (postfork))
		1514	loop_fork (EV_A);
		1515
660	/* update fd-related kernel structures */	1516	/* update fd-related kernel structures */
661	fd_reify ();	1517	fd_reify (EV_A);
662		1518
663	/* calculate blocking time */	1519	/* calculate blocking time */
		1520	{
		1521	ev_tstamp waittime = 0.;
		1522	ev_tstamp sleeptime = 0.;
664		1523
665	/* we only need this for !monotonic clockor timers, but as we basically	1524	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
666	always have timers, we just calculate it always */
667	ev_now = ev_time ();
668
669	if (flags & EVLOOP_NONBLOCK || idlecnt)
670	block = 0.;
671	else
672	{	1525	{
		1526	/* update time to cancel out callback processing overhead */
		1527	time_update (EV_A_ 1e100);
		1528
673	block = MAX_BLOCKTIME;	1529	waittime = MAX_BLOCKTIME;
674		1530
675	if (timercnt)	1531	if (timercnt)
676	{	1532	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1533	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
678	if (block > to) block = to;	1534	if (waittime > to) waittime = to;
679	}	1535	}
680		1536
		1537	#if EV_PERIODIC_ENABLE
681	if (periodiccnt)	1538	if (periodiccnt)
682	{	1539	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1540	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
684	if (block > to) block = to;	1541	if (waittime > to) waittime = to;
685	}	1542	}
		1543	#endif
686		1544
687	if (block < 0.) block = 0.;	1545	if (expect_false (waittime < timeout_blocktime))
		1546	waittime = timeout_blocktime;
		1547
		1548	sleeptime = waittime - backend_fudge;
		1549
		1550	if (expect_true (sleeptime > io_blocktime))
		1551	sleeptime = io_blocktime;
		1552
		1553	if (sleeptime)
		1554	{
		1555	ev_sleep (sleeptime);
		1556	waittime -= sleeptime;
		1557	}
688	}	1558	}
689		1559
690	method_poll (block);	1560	++loop_count;
		1561	backend_poll (EV_A_ waittime);
691		1562
692	/* update ev_now, do magic */	1563	/* update ev_rt_now, do magic */
693	time_update ();	1564	time_update (EV_A_ waittime + sleeptime);
		1565	}
694		1566
695	/* queue pending timers and reschedule them */	1567	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1568	timers_reify (EV_A); /* relative timers called last */
		1569	#if EV_PERIODIC_ENABLE
697	periodics_reify (); /* absolute timers called first */	1570	periodics_reify (EV_A); /* absolute timers called first */
		1571	#endif
698		1572
		1573	#if EV_IDLE_ENABLE
699	/* queue idle watchers unless io or timers are pending */	1574	/* queue idle watchers unless other events are pending */
700	if (!pendingcnt)	1575	idle_reify (EV_A);
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1576	#endif
702		1577
703	/* queue check watchers, to be executed first */	1578	/* queue check watchers, to be executed first */
704	if (checkcnt)	1579	if (expect_false (checkcnt))
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1580	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1581
707	call_pending ();	1582	call_pending (EV_A);
708	}
709	while (!ev_loop_done);
710		1583
711	if (ev_loop_done != 2)	1584	}
		1585	while (expect_true (activecnt && !loop_done));
		1586
		1587	if (loop_done == EVUNLOOP_ONE)
		1588	loop_done = EVUNLOOP_CANCEL;
		1589	}
		1590
		1591	void
		1592	ev_unloop (EV_P_ int how)
		1593	{
712	ev_loop_done = 0;	1594	loop_done = how;
713	}	1595	}
714		1596
715	/*****************************************************************************/	1597	/*****************************************************************************/
716		1598
717	static void	1599	void inline_size
718	wlist_add (WL *head, WL elem)	1600	wlist_add (WL *head, WL elem)
719	{	1601	{
720	elem->next = *head;	1602	elem->next = *head;
721	*head = elem;	1603	*head = elem;
722	}	1604	}
723		1605
724	static void	1606	void inline_size
725	wlist_del (WL *head, WL elem)	1607	wlist_del (WL *head, WL elem)
726	{	1608	{
727	while (*head)	1609	while (*head)
728	{	1610	{
729	if (*head == elem)	1611	if (*head == elem)
…		…
734		1616
735	head = &(*head)->next;	1617	head = &(*head)->next;
736	}	1618	}
737	}	1619	}
738		1620
739	static void	1621	void inline_speed
740	ev_clear_pending (W w)	1622	clear_pending (EV_P_ W w)
741	{	1623	{
742	if (w->pending)	1624	if (w->pending)
743	{	1625	{
744	pendings [w->pending - 1].w = 0;	1626	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1627	w->pending = 0;
746	}	1628	}
747	}	1629	}
748		1630
749	static void	1631	int
		1632	ev_clear_pending (EV_P_ void *w)
		1633	{
		1634	W w_ = (W)w;
		1635	int pending = w_->pending;
		1636
		1637	if (expect_true (pending))
		1638	{
		1639	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1640	w_->pending = 0;
		1641	p->w = 0;
		1642	return p->events;
		1643	}
		1644	else
		1645	return 0;
		1646	}
		1647
		1648	void inline_size
		1649	pri_adjust (EV_P_ W w)
		1650	{
		1651	int pri = w->priority;
		1652	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1653	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1654	w->priority = pri;
		1655	}
		1656
		1657	void inline_speed
750	ev_start (W w, int active)	1658	ev_start (EV_P_ W w, int active)
751	{	1659	{
		1660	pri_adjust (EV_A_ w);
752	w->active = active;	1661	w->active = active;
		1662	ev_ref (EV_A);
753	}	1663	}
754		1664
755	static void	1665	void inline_size
756	ev_stop (W w)	1666	ev_stop (EV_P_ W w)
757	{	1667	{
		1668	ev_unref (EV_A);
758	w->active = 0;	1669	w->active = 0;
759	}	1670	}
760		1671
761	/*****************************************************************************/	1672	/*****************************************************************************/
762		1673
763	void	1674	void noinline
764	ev_io_start (struct ev_io *w)	1675	ev_io_start (EV_P_ ev_io *w)
765	{	1676	{
766	if (ev_is_active (w))
767	return;
768
769	int fd = w->fd;	1677	int fd = w->fd;
770		1678
		1679	if (expect_false (ev_is_active (w)))
		1680	return;
		1681
771	assert (("ev_io_start called with negative fd", fd >= 0));	1682	assert (("ev_io_start called with negative fd", fd >= 0));
772		1683
773	ev_start ((W)w, 1);	1684	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1685	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1686	wlist_add (&anfds[fd].head, (WL)w);
776		1687
777	fd_change (fd);	1688	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1689	w->events &= ~EV_IOFDSET;
778	}	1690	}
779		1691
780	void	1692	void noinline
781	ev_io_stop (struct ev_io *w)	1693	ev_io_stop (EV_P_ ev_io *w)
782	{	1694	{
783	ev_clear_pending ((W)w);	1695	clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1696	if (expect_false (!ev_is_active (w)))
785	return;	1697	return;
786		1698
		1699	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1700
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1701	wlist_del (&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1702	ev_stop (EV_A_ (W)w);
789		1703
790	fd_change (w->fd);	1704	fd_change (EV_A_ w->fd, 1);
791	}	1705	}
792		1706
793	void	1707	void noinline
794	ev_timer_start (struct ev_timer *w)	1708	ev_timer_start (EV_P_ ev_timer *w)
795	{	1709	{
796	if (ev_is_active (w))	1710	if (expect_false (ev_is_active (w)))
797	return;	1711	return;
798		1712
799	w->at += now;	1713	((WT)w)->at += mn_now;
800		1714
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1715	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1716
803	ev_start ((W)w, ++timercnt);	1717	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1718	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
805	timers [timercnt - 1] = w;	1719	timers [timercnt - 1] = (WT)w;
806	upheap ((WT *)timers, timercnt - 1);	1720	upheap (timers, timercnt - 1);
807	}
808		1721
809	void	1722	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1723	}
		1724
		1725	void noinline
810	ev_timer_stop (struct ev_timer *w)	1726	ev_timer_stop (EV_P_ ev_timer *w)
811	{	1727	{
812	ev_clear_pending ((W)w);	1728	clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1729	if (expect_false (!ev_is_active (w)))
814	return;	1730	return;
815		1731
816	if (w->active < timercnt--)	1732	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1733
		1734	{
		1735	int active = ((W)w)->active;
		1736
		1737	if (expect_true (--active < --timercnt))
817	{	1738	{
818	timers [w->active - 1] = timers [timercnt];	1739	timers [active] = timers [timercnt];
819	downheap ((WT *)timers, timercnt, w->active - 1);	1740	adjustheap (timers, timercnt, active);
820	}	1741	}
		1742	}
821		1743
822	w->at = w->repeat;	1744	((WT)w)->at -= mn_now;
823		1745
824	ev_stop ((W)w);	1746	ev_stop (EV_A_ (W)w);
825	}	1747	}
826		1748
827	void	1749	void noinline
828	ev_timer_again (struct ev_timer *w)	1750	ev_timer_again (EV_P_ ev_timer *w)
829	{	1751	{
830	if (ev_is_active (w))	1752	if (ev_is_active (w))
831	{	1753	{
832	if (w->repeat)	1754	if (w->repeat)
833	{	1755	{
834	w->at = now + w->repeat;	1756	((WT)w)->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1757	adjustheap (timers, timercnt, ((W)w)->active - 1);
836	}	1758	}
837	else	1759	else
838	ev_timer_stop (w);	1760	ev_timer_stop (EV_A_ w);
839	}	1761	}
840	else if (w->repeat)	1762	else if (w->repeat)
		1763	{
		1764	w->at = w->repeat;
841	ev_timer_start (w);	1765	ev_timer_start (EV_A_ w);
		1766	}
842	}	1767	}
843		1768
844	void	1769	#if EV_PERIODIC_ENABLE
		1770	void noinline
845	ev_periodic_start (struct ev_periodic *w)	1771	ev_periodic_start (EV_P_ ev_periodic *w)
846	{	1772	{
847	if (ev_is_active (w))	1773	if (expect_false (ev_is_active (w)))
848	return;	1774	return;
849		1775
		1776	if (w->reschedule_cb)
		1777	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1778	else if (w->interval)
		1779	{
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1780	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1781	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1782	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1783	}
		1784	else
		1785	((WT)w)->at = w->offset;
855		1786
856	ev_start ((W)w, ++periodiccnt);	1787	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1788	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
858	periodics [periodiccnt - 1] = w;	1789	periodics [periodiccnt - 1] = (WT)w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1790	upheap (periodics, periodiccnt - 1);
860	}
861		1791
862	void	1792	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1793	}
		1794
		1795	void noinline
863	ev_periodic_stop (struct ev_periodic *w)	1796	ev_periodic_stop (EV_P_ ev_periodic *w)
864	{	1797	{
865	ev_clear_pending ((W)w);	1798	clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1799	if (expect_false (!ev_is_active (w)))
867	return;	1800	return;
868		1801
869	if (w->active < periodiccnt--)	1802	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1803
		1804	{
		1805	int active = ((W)w)->active;
		1806
		1807	if (expect_true (--active < --periodiccnt))
870	{	1808	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1809	periodics [active] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1810	adjustheap (periodics, periodiccnt, active);
873	}	1811	}
		1812	}
874		1813
875	ev_stop ((W)w);	1814	ev_stop (EV_A_ (W)w);
876	}	1815	}
877		1816
878	void	1817	void noinline
		1818	ev_periodic_again (EV_P_ ev_periodic *w)
		1819	{
		1820	/* TODO: use adjustheap and recalculation */
		1821	ev_periodic_stop (EV_A_ w);
		1822	ev_periodic_start (EV_A_ w);
		1823	}
		1824	#endif
		1825
		1826	#ifndef SA_RESTART
		1827	# define SA_RESTART 0
		1828	#endif
		1829
		1830	void noinline
879	ev_signal_start (struct ev_signal *w)	1831	ev_signal_start (EV_P_ ev_signal *w)
880	{	1832	{
		1833	#if EV_MULTIPLICITY
		1834	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1835	#endif
881	if (ev_is_active (w))	1836	if (expect_false (ev_is_active (w)))
882	return;	1837	return;
883		1838
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1839	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1840
886	ev_start ((W)w, 1);	1841	{
		1842	#ifndef _WIN32
		1843	sigset_t full, prev;
		1844	sigfillset (&full);
		1845	sigprocmask (SIG_SETMASK, &full, &prev);
		1846	#endif
		1847
887	array_needsize (signals, signalmax, w->signum, signals_init);	1848	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1849
		1850	#ifndef _WIN32
		1851	sigprocmask (SIG_SETMASK, &prev, 0);
		1852	#endif
		1853	}
		1854
		1855	ev_start (EV_A_ (W)w, 1);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1856	wlist_add (&signals [w->signum - 1].head, (WL)w);
889		1857
890	if (!w->next)	1858	if (!((WL)w)->next)
891	{	1859	{
		1860	#if _WIN32
		1861	signal (w->signum, sighandler);
		1862	#else
892	struct sigaction sa;	1863	struct sigaction sa;
893	sa.sa_handler = sighandler;	1864	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1865	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1866	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1867	sigaction (w->signum, &sa, 0);
		1868	#endif
897	}	1869	}
898	}	1870	}
899		1871
900	void	1872	void noinline
901	ev_signal_stop (struct ev_signal *w)	1873	ev_signal_stop (EV_P_ ev_signal *w)
902	{	1874	{
903	ev_clear_pending ((W)w);	1875	clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1876	if (expect_false (!ev_is_active (w)))
905	return;	1877	return;
906		1878
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1879	wlist_del (&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1880	ev_stop (EV_A_ (W)w);
909		1881
910	if (!signals [w->signum - 1].head)	1882	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1883	signal (w->signum, SIG_DFL);
912	}	1884	}
913		1885
914	void	1886	void
915	ev_idle_start (struct ev_idle *w)	1887	ev_child_start (EV_P_ ev_child *w)
916	{	1888	{
		1889	#if EV_MULTIPLICITY
		1890	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1891	#endif
917	if (ev_is_active (w))	1892	if (expect_false (ev_is_active (w)))
918	return;	1893	return;
919		1894
920	ev_start ((W)w, ++idlecnt);	1895	ev_start (EV_A_ (W)w, 1);
921	array_needsize (idles, idlemax, idlecnt, );	1896	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
922	idles [idlecnt - 1] = w;
923	}	1897	}
924		1898
925	void	1899	void
926	ev_idle_stop (struct ev_idle *w)	1900	ev_child_stop (EV_P_ ev_child *w)
927	{	1901	{
928	ev_clear_pending ((W)w);	1902	clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	1903	if (expect_false (!ev_is_active (w)))
930	return;	1904	return;
931		1905
932	idles [w->active - 1] = idles [--idlecnt];	1906	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
933	ev_stop ((W)w);	1907	ev_stop (EV_A_ (W)w);
934	}	1908	}
935		1909
		1910	#if EV_STAT_ENABLE
		1911
		1912	# ifdef _WIN32
		1913	# undef lstat
		1914	# define lstat(a,b) _stati64 (a,b)
		1915	# endif
		1916
		1917	#define DEF_STAT_INTERVAL 5.0074891
		1918	#define MIN_STAT_INTERVAL 0.1074891
		1919
		1920	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1921
		1922	#if EV_USE_INOTIFY
		1923	# define EV_INOTIFY_BUFSIZE 8192
		1924
		1925	static void noinline
		1926	infy_add (EV_P_ ev_stat *w)
		1927	{
		1928	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		1929
		1930	if (w->wd < 0)
		1931	{
		1932	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1933
		1934	/* monitor some parent directory for speedup hints */
		1935	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1936	{
		1937	char path [4096];
		1938	strcpy (path, w->path);
		1939
		1940	do
		1941	{
		1942	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1943	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1944
		1945	char *pend = strrchr (path, '/');
		1946
		1947	if (!pend)
		1948	break; /* whoops, no '/', complain to your admin */
		1949
		1950	*pend = 0;
		1951	w->wd = inotify_add_watch (fs_fd, path, mask);
		1952	}
		1953	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1954	}
		1955	}
		1956	else
		1957	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1958
		1959	if (w->wd >= 0)
		1960	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1961	}
		1962
		1963	static void noinline
		1964	infy_del (EV_P_ ev_stat *w)
		1965	{
		1966	int slot;
		1967	int wd = w->wd;
		1968
		1969	if (wd < 0)
		1970	return;
		1971
		1972	w->wd = -2;
		1973	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1974	wlist_del (&fs_hash [slot].head, (WL)w);
		1975
		1976	/* remove this watcher, if others are watching it, they will rearm */
		1977	inotify_rm_watch (fs_fd, wd);
		1978	}
		1979
		1980	static void noinline
		1981	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1982	{
		1983	if (slot < 0)
		1984	/* overflow, need to check for all hahs slots */
		1985	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1986	infy_wd (EV_A_ slot, wd, ev);
		1987	else
		1988	{
		1989	WL w_;
		1990
		1991	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1992	{
		1993	ev_stat *w = (ev_stat *)w_;
		1994	w_ = w_->next; /* lets us remove this watcher and all before it */
		1995
		1996	if (w->wd == wd || wd == -1)
		1997	{
		1998	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1999	{
		2000	w->wd = -1;
		2001	infy_add (EV_A_ w); /* re-add, no matter what */
		2002	}
		2003
		2004	stat_timer_cb (EV_A_ &w->timer, 0);
		2005	}
		2006	}
		2007	}
		2008	}
		2009
		2010	static void
		2011	infy_cb (EV_P_ ev_io *w, int revents)
		2012	{
		2013	char buf [EV_INOTIFY_BUFSIZE];
		2014	struct inotify_event *ev = (struct inotify_event *)buf;
		2015	int ofs;
		2016	int len = read (fs_fd, buf, sizeof (buf));
		2017
		2018	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2019	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2020	}
		2021
		2022	void inline_size
		2023	infy_init (EV_P)
		2024	{
		2025	if (fs_fd != -2)
		2026	return;
		2027
		2028	fs_fd = inotify_init ();
		2029
		2030	if (fs_fd >= 0)
		2031	{
		2032	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2033	ev_set_priority (&fs_w, EV_MAXPRI);
		2034	ev_io_start (EV_A_ &fs_w);
		2035	}
		2036	}
		2037
		2038	void inline_size
		2039	infy_fork (EV_P)
		2040	{
		2041	int slot;
		2042
		2043	if (fs_fd < 0)
		2044	return;
		2045
		2046	close (fs_fd);
		2047	fs_fd = inotify_init ();
		2048
		2049	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2050	{
		2051	WL w_ = fs_hash [slot].head;
		2052	fs_hash [slot].head = 0;
		2053
		2054	while (w_)
		2055	{
		2056	ev_stat *w = (ev_stat *)w_;
		2057	w_ = w_->next; /* lets us add this watcher */
		2058
		2059	w->wd = -1;
		2060
		2061	if (fs_fd >= 0)
		2062	infy_add (EV_A_ w); /* re-add, no matter what */
		2063	else
		2064	ev_timer_start (EV_A_ &w->timer);
		2065	}
		2066
		2067	}
		2068	}
		2069
		2070	#endif
		2071
936	void	2072	void
		2073	ev_stat_stat (EV_P_ ev_stat *w)
		2074	{
		2075	if (lstat (w->path, &w->attr) < 0)
		2076	w->attr.st_nlink = 0;
		2077	else if (!w->attr.st_nlink)
		2078	w->attr.st_nlink = 1;
		2079	}
		2080
		2081	static void noinline
		2082	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2083	{
		2084	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2085
		2086	/* we copy this here each the time so that */
		2087	/* prev has the old value when the callback gets invoked */
		2088	w->prev = w->attr;
		2089	ev_stat_stat (EV_A_ w);
		2090
		2091	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2092	if (
		2093	w->prev.st_dev != w->attr.st_dev
		2094	|| w->prev.st_ino != w->attr.st_ino
		2095	|| w->prev.st_mode != w->attr.st_mode
		2096	|| w->prev.st_nlink != w->attr.st_nlink
		2097	|| w->prev.st_uid != w->attr.st_uid
		2098	|| w->prev.st_gid != w->attr.st_gid
		2099	|| w->prev.st_rdev != w->attr.st_rdev
		2100	|| w->prev.st_size != w->attr.st_size
		2101	|| w->prev.st_atime != w->attr.st_atime
		2102	|| w->prev.st_mtime != w->attr.st_mtime
		2103	|| w->prev.st_ctime != w->attr.st_ctime
		2104	) {
		2105	#if EV_USE_INOTIFY
		2106	infy_del (EV_A_ w);
		2107	infy_add (EV_A_ w);
		2108	ev_stat_stat (EV_A_ w); /* avoid race... */
		2109	#endif
		2110
		2111	ev_feed_event (EV_A_ w, EV_STAT);
		2112	}
		2113	}
		2114
		2115	void
		2116	ev_stat_start (EV_P_ ev_stat *w)
		2117	{
		2118	if (expect_false (ev_is_active (w)))
		2119	return;
		2120
		2121	/* since we use memcmp, we need to clear any padding data etc. */
		2122	memset (&w->prev, 0, sizeof (ev_statdata));
		2123	memset (&w->attr, 0, sizeof (ev_statdata));
		2124
		2125	ev_stat_stat (EV_A_ w);
		2126
		2127	if (w->interval < MIN_STAT_INTERVAL)
		2128	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2129
		2130	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2131	ev_set_priority (&w->timer, ev_priority (w));
		2132
		2133	#if EV_USE_INOTIFY
		2134	infy_init (EV_A);
		2135
		2136	if (fs_fd >= 0)
		2137	infy_add (EV_A_ w);
		2138	else
		2139	#endif
		2140	ev_timer_start (EV_A_ &w->timer);
		2141
		2142	ev_start (EV_A_ (W)w, 1);
		2143	}
		2144
		2145	void
		2146	ev_stat_stop (EV_P_ ev_stat *w)
		2147	{
		2148	clear_pending (EV_A_ (W)w);
		2149	if (expect_false (!ev_is_active (w)))
		2150	return;
		2151
		2152	#if EV_USE_INOTIFY
		2153	infy_del (EV_A_ w);
		2154	#endif
		2155	ev_timer_stop (EV_A_ &w->timer);
		2156
		2157	ev_stop (EV_A_ (W)w);
		2158	}
		2159	#endif
		2160
		2161	#if EV_IDLE_ENABLE
		2162	void
		2163	ev_idle_start (EV_P_ ev_idle *w)
		2164	{
		2165	if (expect_false (ev_is_active (w)))
		2166	return;
		2167
		2168	pri_adjust (EV_A_ (W)w);
		2169
		2170	{
		2171	int active = ++idlecnt [ABSPRI (w)];
		2172
		2173	++idleall;
		2174	ev_start (EV_A_ (W)w, active);
		2175
		2176	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2177	idles [ABSPRI (w)][active - 1] = w;
		2178	}
		2179	}
		2180
		2181	void
		2182	ev_idle_stop (EV_P_ ev_idle *w)
		2183	{
		2184	clear_pending (EV_A_ (W)w);
		2185	if (expect_false (!ev_is_active (w)))
		2186	return;
		2187
		2188	{
		2189	int active = ((W)w)->active;
		2190
		2191	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2192	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2193
		2194	ev_stop (EV_A_ (W)w);
		2195	--idleall;
		2196	}
		2197	}
		2198	#endif
		2199
		2200	void
937	ev_prepare_start (struct ev_prepare *w)	2201	ev_prepare_start (EV_P_ ev_prepare *w)
938	{	2202	{
939	if (ev_is_active (w))	2203	if (expect_false (ev_is_active (w)))
940	return;	2204	return;
941		2205
942	ev_start ((W)w, ++preparecnt);	2206	ev_start (EV_A_ (W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );	2207	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
944	prepares [preparecnt - 1] = w;	2208	prepares [preparecnt - 1] = w;
945	}	2209	}
946		2210
947	void	2211	void
948	ev_prepare_stop (struct ev_prepare *w)	2212	ev_prepare_stop (EV_P_ ev_prepare *w)
949	{	2213	{
950	ev_clear_pending ((W)w);	2214	clear_pending (EV_A_ (W)w);
951	if (ev_is_active (w))	2215	if (expect_false (!ev_is_active (w)))
952	return;	2216	return;
953		2217
		2218	{
		2219	int active = ((W)w)->active;
954	prepares [w->active - 1] = prepares [--preparecnt];	2220	prepares [active - 1] = prepares [--preparecnt];
		2221	((W)prepares [active - 1])->active = active;
		2222	}
		2223
955	ev_stop ((W)w);	2224	ev_stop (EV_A_ (W)w);
956	}	2225	}
957		2226
958	void	2227	void
959	ev_check_start (struct ev_check *w)	2228	ev_check_start (EV_P_ ev_check *w)
960	{	2229	{
961	if (ev_is_active (w))	2230	if (expect_false (ev_is_active (w)))
962	return;	2231	return;
963		2232
964	ev_start ((W)w, ++checkcnt);	2233	ev_start (EV_A_ (W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );	2234	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
966	checks [checkcnt - 1] = w;	2235	checks [checkcnt - 1] = w;
967	}	2236	}
968		2237
969	void	2238	void
970	ev_check_stop (struct ev_check *w)	2239	ev_check_stop (EV_P_ ev_check *w)
971	{	2240	{
972	ev_clear_pending ((W)w);	2241	clear_pending (EV_A_ (W)w);
973	if (ev_is_active (w))	2242	if (expect_false (!ev_is_active (w)))
974	return;	2243	return;
975		2244
		2245	{
		2246	int active = ((W)w)->active;
976	checks [w->active - 1] = checks [--checkcnt];	2247	checks [active - 1] = checks [--checkcnt];
		2248	((W)checks [active - 1])->active = active;
		2249	}
		2250
977	ev_stop ((W)w);	2251	ev_stop (EV_A_ (W)w);
978	}	2252	}
979		2253
980	void	2254	#if EV_EMBED_ENABLE
981	ev_child_start (struct ev_child *w)	2255	void noinline
		2256	ev_embed_sweep (EV_P_ ev_embed *w)
982	{	2257	{
		2258	ev_loop (w->other, EVLOOP_NONBLOCK);
		2259	}
		2260
		2261	static void
		2262	embed_io_cb (EV_P_ ev_io *io, int revents)
		2263	{
		2264	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2265
983	if (ev_is_active (w))	2266	if (ev_cb (w))
984	return;	2267	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2268	else
		2269	ev_embed_sweep (loop, w);
		2270	}
985		2271
		2272	static void
		2273	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2274	{
		2275	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2276
		2277	fd_reify (w->other);
		2278	}
		2279
		2280	void
		2281	ev_embed_start (EV_P_ ev_embed *w)
		2282	{
		2283	if (expect_false (ev_is_active (w)))
		2284	return;
		2285
		2286	{
		2287	struct ev_loop *loop = w->other;
		2288	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2289	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2290	}
		2291
		2292	ev_set_priority (&w->io, ev_priority (w));
		2293	ev_io_start (EV_A_ &w->io);
		2294
		2295	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2296	ev_set_priority (&w->prepare, EV_MINPRI);
		2297	ev_prepare_start (EV_A_ &w->prepare);
		2298
986	ev_start ((W)w, 1);	2299	ev_start (EV_A_ (W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}	2300	}
989		2301
990	void	2302	void
991	ev_child_stop (struct ev_child *w)	2303	ev_embed_stop (EV_P_ ev_embed *w)
992	{	2304	{
993	ev_clear_pending ((W)w);	2305	clear_pending (EV_A_ (W)w);
994	if (ev_is_active (w))	2306	if (expect_false (!ev_is_active (w)))
995	return;	2307	return;
996		2308
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2309	ev_io_stop (EV_A_ &w->io);
		2310	ev_prepare_stop (EV_A_ &w->prepare);
		2311
998	ev_stop ((W)w);	2312	ev_stop (EV_A_ (W)w);
999	}	2313	}
		2314	#endif
		2315
		2316	#if EV_FORK_ENABLE
		2317	void
		2318	ev_fork_start (EV_P_ ev_fork *w)
		2319	{
		2320	if (expect_false (ev_is_active (w)))
		2321	return;
		2322
		2323	ev_start (EV_A_ (W)w, ++forkcnt);
		2324	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2325	forks [forkcnt - 1] = w;
		2326	}
		2327
		2328	void
		2329	ev_fork_stop (EV_P_ ev_fork *w)
		2330	{
		2331	clear_pending (EV_A_ (W)w);
		2332	if (expect_false (!ev_is_active (w)))
		2333	return;
		2334
		2335	{
		2336	int active = ((W)w)->active;
		2337	forks [active - 1] = forks [--forkcnt];
		2338	((W)forks [active - 1])->active = active;
		2339	}
		2340
		2341	ev_stop (EV_A_ (W)w);
		2342	}
		2343	#endif
1000		2344
1001	/*****************************************************************************/	2345	/*****************************************************************************/
1002		2346
1003	struct ev_once	2347	struct ev_once
1004	{	2348	{
1005	struct ev_io io;	2349	ev_io io;
1006	struct ev_timer to;	2350	ev_timer to;
1007	void (*cb)(int revents, void *arg);	2351	void (*cb)(int revents, void *arg);
1008	void *arg;	2352	void *arg;
1009	};	2353	};
1010		2354
1011	static void	2355	static void
1012	once_cb (struct ev_once *once, int revents)	2356	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	2357	{
1014	void (*cb)(int revents, void *arg) = once->cb;	2358	void (*cb)(int revents, void *arg) = once->cb;
1015	void *arg = once->arg;	2359	void *arg = once->arg;
1016		2360
1017	ev_io_stop (&once->io);	2361	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	2362	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	2363	ev_free (once);
1020		2364
1021	cb (revents, arg);	2365	cb (revents, arg);
1022	}	2366	}
1023		2367
1024	static void	2368	static void
1025	once_cb_io (struct ev_io *w, int revents)	2369	once_cb_io (EV_P_ ev_io *w, int revents)
1026	{	2370	{
1027	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2371	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1028	}	2372	}
1029		2373
1030	static void	2374	static void
1031	once_cb_to (struct ev_timer *w, int revents)	2375	once_cb_to (EV_P_ ev_timer *w, int revents)
1032	{	2376	{
1033	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2377	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1034	}	2378	}
1035		2379
1036	void	2380	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2381	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038	{	2382	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	2383	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1040		2384
1041	if (!once)	2385	if (expect_false (!once))
		2386	{
1042	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2387	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1043	else	2388	return;
1044	{	2389	}
		2390
1045	once->cb = cb;	2391	once->cb = cb;
1046	once->arg = arg;	2392	once->arg = arg;
1047		2393
1048	ev_watcher_init (&once->io, once_cb_io);	2394	ev_init (&once->io, once_cb_io);
1049	if (fd >= 0)	2395	if (fd >= 0)
1050	{	2396	{
1051	ev_io_set (&once->io, fd, events);	2397	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	2398	ev_io_start (EV_A_ &once->io);
1053	}	2399	}
1054		2400
1055	ev_watcher_init (&once->to, once_cb_to);	2401	ev_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	2402	if (timeout >= 0.)
1057	{	2403	{
1058	ev_timer_set (&once->to, timeout, 0.);	2404	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	2405	ev_timer_start (EV_A_ &once->to);
1060	}
1061	}
1062	}
1063
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{	2406	}
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}	2407	}
1141		2408
		2409	#if EV_MULTIPLICITY
		2410	#include "ev_wrap.h"
1142	#endif	2411	#endif
1143		2412
		2413	#ifdef __cplusplus
		2414	}
		2415	#endif
1144		2416
1145
1146

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