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Comparing libev/ev.c (file contents):
Revision 1.50 by root, Sat Nov 3 19:41:55 2007 UTC vs.
Revision 1.179 by root, Tue Dec 11 21:04:40 2007 UTC

…		…
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (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
29	* 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.
30	*/	30	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
31	#ifndef EV_STANDALONE	36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
32	# include "config.h"	40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_INOTIFY
		100	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		101	# define EV_USE_INOTIFY 1
		102	# else
		103	# define EV_USE_INOTIFY 0
		104	# endif
		105	# endif
		106
33	#endif	107	#endif
34		108
35	#include <math.h>	109	#include <math.h>
36	#include <stdlib.h>	110	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	111	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	112	#include <stddef.h>
41		113
42	#include <stdio.h>	114	#include <stdio.h>
43		115
44	#include <assert.h>	116	#include <assert.h>
45	#include <errno.h>	117	#include <errno.h>
46	#include <sys/types.h>	118	#include <sys/types.h>
		119	#include <time.h>
		120
		121	#include <signal.h>
		122
		123	#ifdef EV_H
		124	# include EV_H
		125	#else
		126	# include "ev.h"
		127	#endif
		128
47	#ifndef WIN32	129	#ifndef _WIN32
		130	# include <sys/time.h>
48	# include <sys/wait.h>	131	# include <sys/wait.h>
		132	# include <unistd.h>
		133	#else
		134	# define WIN32_LEAN_AND_MEAN
		135	# include <windows.h>
		136	# ifndef EV_SELECT_IS_WINSOCKET
		137	# define EV_SELECT_IS_WINSOCKET 1
49	#endif	138	# endif
50	#include <sys/time.h>	139	#endif
51	#include <time.h>
52		140
53	/**/	141	/**/
54		142
55	#ifndef EV_USE_MONOTONIC	143	#ifndef EV_USE_MONOTONIC
56	# define EV_USE_MONOTONIC 1	144	# define EV_USE_MONOTONIC 0
		145	#endif
		146
		147	#ifndef EV_USE_REALTIME
		148	# define EV_USE_REALTIME 0
57	#endif	149	#endif
58		150
59	#ifndef EV_USE_SELECT	151	#ifndef EV_USE_SELECT
60	# define EV_USE_SELECT 1	152	# define EV_USE_SELECT 1
61	#endif	153	#endif
62		154
63	#ifndef EV_USE_POLL	155	#ifndef EV_USE_POLL
64	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	156	# ifdef _WIN32
		157	# define EV_USE_POLL 0
		158	# else
		159	# define EV_USE_POLL 1
		160	# endif
65	#endif	161	#endif
66		162
67	#ifndef EV_USE_EPOLL	163	#ifndef EV_USE_EPOLL
68	# define EV_USE_EPOLL 0	164	# define EV_USE_EPOLL 0
69	#endif	165	#endif
70		166
71	#ifndef EV_USE_KQUEUE	167	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	168	# define EV_USE_KQUEUE 0
73	#endif	169	#endif
74		170
75	#ifndef EV_USE_REALTIME	171	#ifndef EV_USE_PORT
76	# define EV_USE_REALTIME 1	172	# define EV_USE_PORT 0
		173	#endif
		174
		175	#ifndef EV_USE_INOTIFY
		176	# define EV_USE_INOTIFY 0
		177	#endif
		178
		179	#ifndef EV_PID_HASHSIZE
		180	# if EV_MINIMAL
		181	# define EV_PID_HASHSIZE 1
		182	# else
		183	# define EV_PID_HASHSIZE 16
		184	# endif
		185	#endif
		186
		187	#ifndef EV_INOTIFY_HASHSIZE
		188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
		192	# endif
77	#endif	193	#endif
78		194
79	/**/	195	/**/
80		196
81	#ifndef CLOCK_MONOTONIC	197	#ifndef CLOCK_MONOTONIC
…		…
86	#ifndef CLOCK_REALTIME	202	#ifndef CLOCK_REALTIME
87	# undef EV_USE_REALTIME	203	# undef EV_USE_REALTIME
88	# define EV_USE_REALTIME 0	204	# define EV_USE_REALTIME 0
89	#endif	205	#endif
90		206
		207	#if EV_SELECT_IS_WINSOCKET
		208	# include <winsock.h>
		209	#endif
		210
		211	#if !EV_STAT_ENABLE
		212	# define EV_USE_INOTIFY 0
		213	#endif
		214
		215	#if EV_USE_INOTIFY
		216	# include <sys/inotify.h>
		217	#endif
		218
91	/**/	219	/**/
92		220
		221	/*
		222	* This is used to avoid floating point rounding problems.
		223	* It is added to ev_rt_now when scheduling periodics
		224	* to ensure progress, time-wise, even when rounding
		225	* errors are against us.
		226	* This value is good at least till the year 4000.
		227	* Better solutions welcome.
		228	*/
		229	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		230
93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	231	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	232	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	233	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
97
98	#include "ev.h"
99		234
100	#if __GNUC__ >= 3	235	#if __GNUC__ >= 3
101	# define expect(expr,value) __builtin_expect ((expr),(value))	236	# define expect(expr,value) __builtin_expect ((expr),(value))
102	# define inline inline	237	# define noinline __attribute__ ((noinline))
103	#else	238	#else
104	# define expect(expr,value) (expr)	239	# define expect(expr,value) (expr)
105	# define inline static	240	# define noinline
		241	# if __STDC_VERSION__ < 199901L
		242	# define inline
		243	# endif
106	#endif	244	#endif
107		245
108	#define expect_false(expr) expect ((expr) != 0, 0)	246	#define expect_false(expr) expect ((expr) != 0, 0)
109	#define expect_true(expr) expect ((expr) != 0, 1)	247	#define expect_true(expr) expect ((expr) != 0, 1)
		248	#define inline_size static inline
		249
		250	#if EV_MINIMAL
		251	# define inline_speed static noinline
		252	#else
		253	# define inline_speed static inline
		254	#endif
110		255
111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	256	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	257	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
113		258
		259	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		260	#define EMPTY2(a,b) /* used to suppress some warnings */
		261
114	typedef struct ev_watcher *W;	262	typedef ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	263	typedef ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	264	typedef ev_watcher_time *WT;
117		265
118	static ev_tstamp now_floor, now, diff; /* monotonic clock */	266	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		267
		268	#ifdef _WIN32
		269	# include "ev_win32.c"
		270	#endif
		271
		272	/*****************************************************************************/
		273
		274	static void (*syserr_cb)(const char *msg);
		275
		276	void
		277	ev_set_syserr_cb (void (*cb)(const char *msg))
		278	{
		279	syserr_cb = cb;
		280	}
		281
		282	static void noinline
		283	syserr (const char *msg)
		284	{
		285	if (!msg)
		286	msg = "(libev) system error";
		287
		288	if (syserr_cb)
		289	syserr_cb (msg);
		290	else
		291	{
		292	perror (msg);
		293	abort ();
		294	}
		295	}
		296
		297	static void *(*alloc)(void *ptr, long size);
		298
		299	void
		300	ev_set_allocator (void *(*cb)(void *ptr, long size))
		301	{
		302	alloc = cb;
		303	}
		304
		305	inline_speed void *
		306	ev_realloc (void *ptr, long size)
		307	{
		308	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		309
		310	if (!ptr && size)
		311	{
		312	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		313	abort ();
		314	}
		315
		316	return ptr;
		317	}
		318
		319	#define ev_malloc(size) ev_realloc (0, (size))
		320	#define ev_free(ptr) ev_realloc ((ptr), 0)
		321
		322	/*****************************************************************************/
		323
		324	typedef struct
		325	{
		326	WL head;
		327	unsigned char events;
		328	unsigned char reify;
		329	#if EV_SELECT_IS_WINSOCKET
		330	SOCKET handle;
		331	#endif
		332	} ANFD;
		333
		334	typedef struct
		335	{
		336	W w;
		337	int events;
		338	} ANPENDING;
		339
		340	#if EV_USE_INOTIFY
		341	typedef struct
		342	{
		343	WL head;
		344	} ANFS;
		345	#endif
		346
		347	#if EV_MULTIPLICITY
		348
		349	struct ev_loop
		350	{
		351	ev_tstamp ev_rt_now;
		352	#define ev_rt_now ((loop)->ev_rt_now)
		353	#define VAR(name,decl) decl;
		354	#include "ev_vars.h"
		355	#undef VAR
		356	};
		357	#include "ev_wrap.h"
		358
		359	static struct ev_loop default_loop_struct;
		360	struct ev_loop *ev_default_loop_ptr;
		361
		362	#else
		363
119	ev_tstamp ev_now;	364	ev_tstamp ev_rt_now;
120	int ev_method;	365	#define VAR(name,decl) static decl;
		366	#include "ev_vars.h"
		367	#undef VAR
121		368
122	static int have_monotonic; /* runtime */	369	static int ev_default_loop_ptr;
123		370
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	371	#endif
125	static void (*method_modify)(int fd, int oev, int nev);
126	static void (*method_poll)(ev_tstamp timeout);
127		372
128	/*****************************************************************************/	373	/*****************************************************************************/
129		374
130	ev_tstamp	375	ev_tstamp
131	ev_time (void)	376	ev_time (void)
…		…
139	gettimeofday (&tv, 0);	384	gettimeofday (&tv, 0);
140	return tv.tv_sec + tv.tv_usec * 1e-6;	385	return tv.tv_sec + tv.tv_usec * 1e-6;
141	#endif	386	#endif
142	}	387	}
143		388
144	static ev_tstamp	389	ev_tstamp inline_size
145	get_clock (void)	390	get_clock (void)
146	{	391	{
147	#if EV_USE_MONOTONIC	392	#if EV_USE_MONOTONIC
148	if (expect_true (have_monotonic))	393	if (expect_true (have_monotonic))
149	{	394	{
…		…
154	#endif	399	#endif
155		400
156	return ev_time ();	401	return ev_time ();
157	}	402	}
158		403
159	#define array_roundsize(base,n) ((n) | 4 & ~3)	404	#if EV_MULTIPLICITY
		405	ev_tstamp
		406	ev_now (EV_P)
		407	{
		408	return ev_rt_now;
		409	}
		410	#endif
160		411
		412	int inline_size
		413	array_nextsize (int elem, int cur, int cnt)
		414	{
		415	int ncur = cur + 1;
		416
		417	do
		418	ncur <<= 1;
		419	while (cnt > ncur);
		420
		421	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		422	if (elem * ncur > 4096)
		423	{
		424	ncur *= elem;
		425	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		426	ncur = ncur - sizeof (void *) * 4;
		427	ncur /= elem;
		428	}
		429
		430	return ncur;
		431	}
		432
		433	static noinline void *
		434	array_realloc (int elem, void *base, int *cur, int cnt)
		435	{
		436	*cur = array_nextsize (elem, *cur, cnt);
		437	return ev_realloc (base, elem * *cur);
		438	}
		439
161	#define array_needsize(base,cur,cnt,init) \	440	#define array_needsize(type,base,cur,cnt,init) \
162	if (expect_false ((cnt) > cur)) \	441	if (expect_false ((cnt) > (cur))) \
163	{ \	442	{ \
164	int newcnt = cur; \	443	int ocur_ = (cur); \
165	do \	444	(base) = (type *)array_realloc \
166	{ \	445	(sizeof (type), (base), &(cur), (cnt)); \
167	newcnt = array_roundsize (base, newcnt << 1); \	446	init ((base) + (ocur_), (cur) - ocur_); \
168	} \	447	}
169	while ((cnt) > newcnt); \	448
		449	#if 0
		450	#define array_slim(type,stem) \
		451	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
170	\	452	{ \
171	base = realloc (base, sizeof (*base) * (newcnt)); \	453	stem ## max = array_roundsize (stem ## cnt >> 1); \
172	init (base + cur, newcnt - cur); \	454	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
173	cur = newcnt; \	455	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
174	}	456	}
		457	#endif
		458
		459	#define array_free(stem, idx) \
		460	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
175		461
176	/*****************************************************************************/	462	/*****************************************************************************/
177		463
178	typedef struct	464	void noinline
		465	ev_feed_event (EV_P_ void *w, int revents)
179	{	466	{
180	struct ev_watcher_list *head;	467	W w_ = (W)w;
181	unsigned char events;	468	int pri = ABSPRI (w_);
182	unsigned char reify;
183	} ANFD;
184		469
185	static ANFD *anfds;	470	if (expect_false (w_->pending))
186	static int anfdmax;	471	pendings [pri][w_->pending - 1].events |= revents;
		472	else
		473	{
		474	w_->pending = ++pendingcnt [pri];
		475	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		476	pendings [pri][w_->pending - 1].w = w_;
		477	pendings [pri][w_->pending - 1].events = revents;
		478	}
		479	}
187		480
188	static void	481	void inline_speed
		482	queue_events (EV_P_ W *events, int eventcnt, int type)
		483	{
		484	int i;
		485
		486	for (i = 0; i < eventcnt; ++i)
		487	ev_feed_event (EV_A_ events [i], type);
		488	}
		489
		490	/*****************************************************************************/
		491
		492	void inline_size
189	anfds_init (ANFD *base, int count)	493	anfds_init (ANFD *base, int count)
190	{	494	{
191	while (count--)	495	while (count--)
192	{	496	{
193	base->head = 0;	497	base->head = 0;
…		…
196		500
197	++base;	501	++base;
198	}	502	}
199	}	503	}
200		504
201	typedef struct	505	void inline_speed
202	{
203	W w;
204	int events;
205	} ANPENDING;
206
207	static ANPENDING *pendings [NUMPRI];
208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210	static void
211	event (W w, int events)
212	{
213	if (w->pending)
214	{
215	pendings [ABSPRI (w)][w->pending - 1].events |= events;
216	return;
217	}
218
219	w->pending = ++pendingcnt [ABSPRI (w)];
220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
221	pendings [ABSPRI (w)][w->pending - 1].w = w;
222	pendings [ABSPRI (w)][w->pending - 1].events = events;
223	}
224
225	static void
226	queue_events (W *events, int eventcnt, int type)
227	{
228	int i;
229
230	for (i = 0; i < eventcnt; ++i)
231	event (events [i], type);
232	}
233
234	static void
235	fd_event (int fd, int events)	506	fd_event (EV_P_ int fd, int revents)
236	{	507	{
237	ANFD *anfd = anfds + fd;	508	ANFD *anfd = anfds + fd;
238	struct ev_io *w;	509	ev_io *w;
239		510
240	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	511	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
241	{	512	{
242	int ev = w->events & events;	513	int ev = w->events & revents;
243		514
244	if (ev)	515	if (ev)
245	event ((W)w, ev);	516	ev_feed_event (EV_A_ (W)w, ev);
246	}	517	}
247	}	518	}
248		519
249	/*****************************************************************************/	520	void
		521	ev_feed_fd_event (EV_P_ int fd, int revents)
		522	{
		523	if (fd >= 0 && fd < anfdmax)
		524	fd_event (EV_A_ fd, revents);
		525	}
250		526
251	static int *fdchanges;	527	void inline_size
252	static int fdchangemax, fdchangecnt;	528	fd_reify (EV_P)
253
254	static void
255	fd_reify (void)
256	{	529	{
257	int i;	530	int i;
258		531
259	for (i = 0; i < fdchangecnt; ++i)	532	for (i = 0; i < fdchangecnt; ++i)
260	{	533	{
261	int fd = fdchanges [i];	534	int fd = fdchanges [i];
262	ANFD *anfd = anfds + fd;	535	ANFD *anfd = anfds + fd;
263	struct ev_io *w;	536	ev_io *w;
264		537
265	int events = 0;	538	int events = 0;
266		539
267	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	540	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
268	events |= w->events;	541	events |= w->events;
269		542
		543	#if EV_SELECT_IS_WINSOCKET
		544	if (events)
		545	{
		546	unsigned long argp;
		547	anfd->handle = _get_osfhandle (fd);
		548	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		549	}
		550	#endif
		551
270	anfd->reify = 0;	552	anfd->reify = 0;
271		553
272	if (anfd->events != events)
273	{
274	method_modify (fd, anfd->events, events);	554	backend_modify (EV_A_ fd, anfd->events, events);
275	anfd->events = events;	555	anfd->events = events;
276	}
277	}	556	}
278		557
279	fdchangecnt = 0;	558	fdchangecnt = 0;
280	}	559	}
281		560
282	static void	561	void inline_size
283	fd_change (int fd)	562	fd_change (EV_P_ int fd)
284	{	563	{
285	if (anfds [fd].reify || fdchangecnt < 0)	564	if (expect_false (anfds [fd].reify))
286	return;	565	return;
287		566
288	anfds [fd].reify = 1;	567	anfds [fd].reify = 1;
289		568
290	++fdchangecnt;	569	++fdchangecnt;
291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	570	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
292	fdchanges [fdchangecnt - 1] = fd;	571	fdchanges [fdchangecnt - 1] = fd;
293	}	572	}
294		573
295	static void	574	void inline_speed
296	fd_kill (int fd)	575	fd_kill (EV_P_ int fd)
297	{	576	{
298	struct ev_io *w;	577	ev_io *w;
299		578
300	while ((w = (struct ev_io *)anfds [fd].head))	579	while ((w = (ev_io *)anfds [fd].head))
301	{	580	{
302	ev_io_stop (w);	581	ev_io_stop (EV_A_ w);
303	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);	582	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
304	}	583	}
		584	}
		585
		586	int inline_size
		587	fd_valid (int fd)
		588	{
		589	#ifdef _WIN32
		590	return _get_osfhandle (fd) != -1;
		591	#else
		592	return fcntl (fd, F_GETFD) != -1;
		593	#endif
305	}	594	}
306		595
307	/* called on EBADF to verify fds */	596	/* called on EBADF to verify fds */
308	static void	597	static void noinline
309	fd_ebadf (void)	598	fd_ebadf (EV_P)
310	{	599	{
311	int fd;	600	int fd;
312		601
313	for (fd = 0; fd < anfdmax; ++fd)	602	for (fd = 0; fd < anfdmax; ++fd)
314	if (anfds [fd].events)	603	if (anfds [fd].events)
315	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	604	if (!fd_valid (fd) == -1 && errno == EBADF)
316	fd_kill (fd);	605	fd_kill (EV_A_ fd);
317	}	606	}
318		607
319	/* called on ENOMEM in select/poll to kill some fds and retry */	608	/* called on ENOMEM in select/poll to kill some fds and retry */
320	static void	609	static void noinline
321	fd_enomem (void)	610	fd_enomem (EV_P)
322	{	611	{
323	int fd = anfdmax;	612	int fd;
324		613
325	while (fd--)	614	for (fd = anfdmax; fd--; )
326	if (anfds [fd].events)	615	if (anfds [fd].events)
327	{	616	{
328	close (fd);
329	fd_kill (fd);	617	fd_kill (EV_A_ fd);
330	return;	618	return;
331	}	619	}
332	}	620	}
333		621
		622	/* usually called after fork if backend needs to re-arm all fds from scratch */
		623	static void noinline
		624	fd_rearm_all (EV_P)
		625	{
		626	int fd;
		627
		628	for (fd = 0; fd < anfdmax; ++fd)
		629	if (anfds [fd].events)
		630	{
		631	anfds [fd].events = 0;
		632	fd_change (EV_A_ fd);
		633	}
		634	}
		635
334	/*****************************************************************************/	636	/*****************************************************************************/
335		637
336	static struct ev_timer **timers;	638	void inline_speed
337	static int timermax, timercnt;
338
339	static struct ev_periodic **periodics;
340	static int periodicmax, periodiccnt;
341
342	static void
343	upheap (WT *timers, int k)	639	upheap (WT *heap, int k)
344	{	640	{
345	WT w = timers [k];	641	WT w = heap [k];
346		642
347	while (k && timers [k >> 1]->at > w->at)	643	while (k)
348	{
349	timers [k] = timers [k >> 1];
350	timers [k]->active = k + 1;
351	k >>= 1;
352	}	644	{
353
354	timers [k] = w;
355	timers [k]->active = k + 1;
356
357	}
358
359	static void
360	downheap (WT *timers, int N, int k)
361	{
362	WT w = timers [k];
363
364	while (k < (N >> 1))
365	{
366	int j = k << 1;	645	int p = (k - 1) >> 1;
367		646
368	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	647	if (heap [p]->at <= w->at)
369	++j;
370
371	if (w->at <= timers [j]->at)
372	break;	648	break;
373		649
374	timers [k] = timers [j];	650	heap [k] = heap [p];
375	timers [k]->active = k + 1;	651	((W)heap [k])->active = k + 1;
376	k = j;	652	k = p;
		653	}
		654
		655	heap [k] = w;
		656	((W)heap [k])->active = k + 1;
		657
		658	}
		659
		660	void inline_speed
		661	downheap (WT *heap, int N, int k)
		662	{
		663	WT w = heap [k];
		664
		665	for (;;)
377	}	666	{
		667	int c = (k << 1) + 1;
378		668
		669	if (c >= N)
		670	break;
		671
		672	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		673	? 1 : 0;
		674
		675	if (w->at <= heap [c]->at)
		676	break;
		677
		678	heap [k] = heap [c];
		679	((W)heap [k])->active = k + 1;
		680
		681	k = c;
		682	}
		683
379	timers [k] = w;	684	heap [k] = w;
380	timers [k]->active = k + 1;	685	((W)heap [k])->active = k + 1;
		686	}
		687
		688	void inline_size
		689	adjustheap (WT *heap, int N, int k)
		690	{
		691	upheap (heap, k);
		692	downheap (heap, N, k);
381	}	693	}
382		694
383	/*****************************************************************************/	695	/*****************************************************************************/
384		696
385	typedef struct	697	typedef struct
386	{	698	{
387	struct ev_watcher_list *head;	699	WL head;
388	sig_atomic_t volatile gotsig;	700	sig_atomic_t volatile gotsig;
389	} ANSIG;	701	} ANSIG;
390		702
391	static ANSIG *signals;	703	static ANSIG *signals;
392	static int signalmax;	704	static int signalmax;
393		705
394	static int sigpipe [2];	706	static int sigpipe [2];
395	static sig_atomic_t volatile gotsig;	707	static sig_atomic_t volatile gotsig;
396	static struct ev_io sigev;	708	static ev_io sigev;
397		709
398	static void	710	void inline_size
399	signals_init (ANSIG *base, int count)	711	signals_init (ANSIG *base, int count)
400	{	712	{
401	while (count--)	713	while (count--)
402	{	714	{
403	base->head = 0;	715	base->head = 0;
…		…
408	}	720	}
409		721
410	static void	722	static void
411	sighandler (int signum)	723	sighandler (int signum)
412	{	724	{
		725	#if _WIN32
		726	signal (signum, sighandler);
		727	#endif
		728
413	signals [signum - 1].gotsig = 1;	729	signals [signum - 1].gotsig = 1;
414		730
415	if (!gotsig)	731	if (!gotsig)
416	{	732	{
417	int old_errno = errno;	733	int old_errno = errno;
…		…
419	write (sigpipe [1], &signum, 1);	735	write (sigpipe [1], &signum, 1);
420	errno = old_errno;	736	errno = old_errno;
421	}	737	}
422	}	738	}
423		739
		740	void noinline
		741	ev_feed_signal_event (EV_P_ int signum)
		742	{
		743	WL w;
		744
		745	#if EV_MULTIPLICITY
		746	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		747	#endif
		748
		749	--signum;
		750
		751	if (signum < 0 || signum >= signalmax)
		752	return;
		753
		754	signals [signum].gotsig = 0;
		755
		756	for (w = signals [signum].head; w; w = w->next)
		757	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		758	}
		759
424	static void	760	static void
425	sigcb (struct ev_io *iow, int revents)	761	sigcb (EV_P_ ev_io *iow, int revents)
426	{	762	{
427	struct ev_watcher_list *w;
428	int signum;	763	int signum;
429		764
430	read (sigpipe [0], &revents, 1);	765	read (sigpipe [0], &revents, 1);
431	gotsig = 0;	766	gotsig = 0;
432		767
433	for (signum = signalmax; signum--; )	768	for (signum = signalmax; signum--; )
434	if (signals [signum].gotsig)	769	if (signals [signum].gotsig)
		770	ev_feed_signal_event (EV_A_ signum + 1);
		771	}
		772
		773	void inline_speed
		774	fd_intern (int fd)
		775	{
		776	#ifdef _WIN32
		777	int arg = 1;
		778	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		779	#else
		780	fcntl (fd, F_SETFD, FD_CLOEXEC);
		781	fcntl (fd, F_SETFL, O_NONBLOCK);
		782	#endif
		783	}
		784
		785	static void noinline
		786	siginit (EV_P)
		787	{
		788	fd_intern (sigpipe [0]);
		789	fd_intern (sigpipe [1]);
		790
		791	ev_io_set (&sigev, sigpipe [0], EV_READ);
		792	ev_io_start (EV_A_ &sigev);
		793	ev_unref (EV_A); /* child watcher should not keep loop alive */
		794	}
		795
		796	/*****************************************************************************/
		797
		798	static ev_child *childs [EV_PID_HASHSIZE];
		799
		800	#ifndef _WIN32
		801
		802	static ev_signal childev;
		803
		804	void inline_speed
		805	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		806	{
		807	ev_child *w;
		808
		809	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		810	if (w->pid == pid || !w->pid)
435	{	811	{
436	signals [signum].gotsig = 0;	812	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
437		813	w->rpid = pid;
438	for (w = signals [signum].head; w; w = w->next)	814	w->rstatus = status;
439	event ((W)w, EV_SIGNAL);	815	ev_feed_event (EV_A_ (W)w, EV_CHILD);
440	}	816	}
441	}	817	}
442
443	static void
444	siginit (void)
445	{
446	#ifndef WIN32
447	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
448	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
449
450	/* rather than sort out wether we really need nb, set it */
451	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
452	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
453	#endif
454
455	ev_io_set (&sigev, sigpipe [0], EV_READ);
456	ev_io_start (&sigev);
457	}
458
459	/*****************************************************************************/
460
461	static struct ev_idle **idles;
462	static int idlemax, idlecnt;
463
464	static struct ev_prepare **prepares;
465	static int preparemax, preparecnt;
466
467	static struct ev_check **checks;
468	static int checkmax, checkcnt;
469
470	/*****************************************************************************/
471
472	static struct ev_child *childs [PID_HASHSIZE];
473	static struct ev_signal childev;
474
475	#ifndef WIN32
476		818
477	#ifndef WCONTINUED	819	#ifndef WCONTINUED
478	# define WCONTINUED 0	820	# define WCONTINUED 0
479	#endif	821	#endif
480		822
481	static void	823	static void
482	child_reap (struct ev_signal *sw, int chain, int pid, int status)
483	{
484	struct ev_child *w;
485
486	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
487	if (w->pid == pid || !w->pid)
488	{
489	w->priority = sw->priority; /* need to do it *now* */
490	w->rpid = pid;
491	w->rstatus = status;
492	event ((W)w, EV_CHILD);
493	}
494	}
495
496	static void
497	childcb (struct ev_signal *sw, int revents)	824	childcb (EV_P_ ev_signal *sw, int revents)
498	{	825	{
499	int pid, status;	826	int pid, status;
500		827
		828	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
501	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	829	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
502	{	830	if (!WCONTINUED
		831	|| errno != EINVAL
		832	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		833	return;
		834
503	/* make sure we are called again until all childs have been reaped */	835	/* make sure we are called again until all childs have been reaped */
		836	/* we need to do it this way so that the callback gets called before we continue */
504	event ((W)sw, EV_SIGNAL);	837	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
505		838
506	child_reap (sw, pid, pid, status);	839	child_reap (EV_A_ sw, pid, pid, status);
		840	if (EV_PID_HASHSIZE > 1)
507	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	841	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
508	}
509	}	842	}
510		843
511	#endif	844	#endif
512		845
513	/*****************************************************************************/	846	/*****************************************************************************/
514		847
		848	#if EV_USE_PORT
		849	# include "ev_port.c"
		850	#endif
515	#if EV_USE_KQUEUE	851	#if EV_USE_KQUEUE
516	# include "ev_kqueue.c"	852	# include "ev_kqueue.c"
517	#endif	853	#endif
518	#if EV_USE_EPOLL	854	#if EV_USE_EPOLL
519	# include "ev_epoll.c"	855	# include "ev_epoll.c"
…		…
536	{	872	{
537	return EV_VERSION_MINOR;	873	return EV_VERSION_MINOR;
538	}	874	}
539		875
540	/* return true if we are running with elevated privileges and should ignore env variables */	876	/* return true if we are running with elevated privileges and should ignore env variables */
541	static int	877	int inline_size
542	enable_secure ()	878	enable_secure (void)
543	{	879	{
544	#ifdef WIN32	880	#ifdef _WIN32
545	return 0;	881	return 0;
546	#else	882	#else
547	return getuid () != geteuid ()	883	return getuid () != geteuid ()
548	|| getgid () != getegid ();	884	|| getgid () != getegid ();
549	#endif	885	#endif
550	}	886	}
551		887
552	int ev_init (int methods)	888	unsigned int
		889	ev_supported_backends (void)
553	{	890	{
554	if (!ev_method)	891	unsigned int flags = 0;
		892
		893	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		894	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		895	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		896	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		897	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		898
		899	return flags;
		900	}
		901
		902	unsigned int
		903	ev_recommended_backends (void)
		904	{
		905	unsigned int flags = ev_supported_backends ();
		906
		907	#ifndef __NetBSD__
		908	/* kqueue is borked on everything but netbsd apparently */
		909	/* it usually doesn't work correctly on anything but sockets and pipes */
		910	flags &= ~EVBACKEND_KQUEUE;
		911	#endif
		912	#ifdef __APPLE__
		913	// flags &= ~EVBACKEND_KQUEUE; for documentation
		914	flags &= ~EVBACKEND_POLL;
		915	#endif
		916
		917	return flags;
		918	}
		919
		920	unsigned int
		921	ev_embeddable_backends (void)
		922	{
		923	return EVBACKEND_EPOLL
		924	| EVBACKEND_KQUEUE
		925	| EVBACKEND_PORT;
		926	}
		927
		928	unsigned int
		929	ev_backend (EV_P)
		930	{
		931	return backend;
		932	}
		933
		934	unsigned int
		935	ev_loop_count (EV_P)
		936	{
		937	return loop_count;
		938	}
		939
		940	static void noinline
		941	loop_init (EV_P_ unsigned int flags)
		942	{
		943	if (!backend)
555	{	944	{
556	#if EV_USE_MONOTONIC	945	#if EV_USE_MONOTONIC
557	{	946	{
558	struct timespec ts;	947	struct timespec ts;
559	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	948	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
560	have_monotonic = 1;	949	have_monotonic = 1;
561	}	950	}
562	#endif	951	#endif
563		952
564	ev_now = ev_time ();	953	ev_rt_now = ev_time ();
565	now = get_clock ();	954	mn_now = get_clock ();
566	now_floor = now;	955	now_floor = mn_now;
567	diff = ev_now - now;	956	rtmn_diff = ev_rt_now - mn_now;
568		957
569	if (pipe (sigpipe))	958	/* pid check not overridable via env */
570	return 0;	959	#ifndef _WIN32
		960	if (flags & EVFLAG_FORKCHECK)
		961	curpid = getpid ();
		962	#endif
571		963
572	if (methods == EVMETHOD_AUTO)	964	if (!(flags & EVFLAG_NOENV)
573	if (!enable_secure () && getenv ("LIBEV_METHODS"))	965	&& !enable_secure ()
		966	&& getenv ("LIBEV_FLAGS"))
574	methods = atoi (getenv ("LIBEV_METHODS"));	967	flags = atoi (getenv ("LIBEV_FLAGS"));
575	else
576	methods = EVMETHOD_ANY;
577		968
578	ev_method = 0;	969	if (!(flags & 0x0000ffffUL))
		970	flags |= ev_recommended_backends ();
		971
		972	backend = 0;
		973	backend_fd = -1;
		974	#if EV_USE_INOTIFY
		975	fs_fd = -2;
		976	#endif
		977
		978	#if EV_USE_PORT
		979	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		980	#endif
579	#if EV_USE_KQUEUE	981	#if EV_USE_KQUEUE
580	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	982	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
581	#endif	983	#endif
582	#if EV_USE_EPOLL	984	#if EV_USE_EPOLL
583	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	985	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
584	#endif	986	#endif
585	#if EV_USE_POLL	987	#if EV_USE_POLL
586	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	988	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
587	#endif	989	#endif
588	#if EV_USE_SELECT	990	#if EV_USE_SELECT
589	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	991	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
590	#endif	992	#endif
591		993
592	if (ev_method)	994	ev_init (&sigev, sigcb);
		995	ev_set_priority (&sigev, EV_MAXPRI);
		996	}
		997	}
		998
		999	static void noinline
		1000	loop_destroy (EV_P)
		1001	{
		1002	int i;
		1003
		1004	#if EV_USE_INOTIFY
		1005	if (fs_fd >= 0)
		1006	close (fs_fd);
		1007	#endif
		1008
		1009	if (backend_fd >= 0)
		1010	close (backend_fd);
		1011
		1012	#if EV_USE_PORT
		1013	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1014	#endif
		1015	#if EV_USE_KQUEUE
		1016	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1017	#endif
		1018	#if EV_USE_EPOLL
		1019	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1020	#endif
		1021	#if EV_USE_POLL
		1022	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1023	#endif
		1024	#if EV_USE_SELECT
		1025	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1026	#endif
		1027
		1028	for (i = NUMPRI; i--; )
		1029	{
		1030	array_free (pending, [i]);
		1031	#if EV_IDLE_ENABLE
		1032	array_free (idle, [i]);
		1033	#endif
		1034	}
		1035
		1036	/* have to use the microsoft-never-gets-it-right macro */
		1037	array_free (fdchange, EMPTY);
		1038	array_free (timer, EMPTY);
		1039	#if EV_PERIODIC_ENABLE
		1040	array_free (periodic, EMPTY);
		1041	#endif
		1042	array_free (prepare, EMPTY);
		1043	array_free (check, EMPTY);
		1044
		1045	backend = 0;
		1046	}
		1047
		1048	void inline_size infy_fork (EV_P);
		1049
		1050	void inline_size
		1051	loop_fork (EV_P)
		1052	{
		1053	#if EV_USE_PORT
		1054	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1055	#endif
		1056	#if EV_USE_KQUEUE
		1057	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1058	#endif
		1059	#if EV_USE_EPOLL
		1060	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1061	#endif
		1062	#if EV_USE_INOTIFY
		1063	infy_fork (EV_A);
		1064	#endif
		1065
		1066	if (ev_is_active (&sigev))
		1067	{
		1068	/* default loop */
		1069
		1070	ev_ref (EV_A);
		1071	ev_io_stop (EV_A_ &sigev);
		1072	close (sigpipe [0]);
		1073	close (sigpipe [1]);
		1074
		1075	while (pipe (sigpipe))
		1076	syserr ("(libev) error creating pipe");
		1077
		1078	siginit (EV_A);
		1079	}
		1080
		1081	postfork = 0;
		1082	}
		1083
		1084	#if EV_MULTIPLICITY
		1085	struct ev_loop *
		1086	ev_loop_new (unsigned int flags)
		1087	{
		1088	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1089
		1090	memset (loop, 0, sizeof (struct ev_loop));
		1091
		1092	loop_init (EV_A_ flags);
		1093
		1094	if (ev_backend (EV_A))
		1095	return loop;
		1096
		1097	return 0;
		1098	}
		1099
		1100	void
		1101	ev_loop_destroy (EV_P)
		1102	{
		1103	loop_destroy (EV_A);
		1104	ev_free (loop);
		1105	}
		1106
		1107	void
		1108	ev_loop_fork (EV_P)
		1109	{
		1110	postfork = 1;
		1111	}
		1112
		1113	#endif
		1114
		1115	#if EV_MULTIPLICITY
		1116	struct ev_loop *
		1117	ev_default_loop_init (unsigned int flags)
		1118	#else
		1119	int
		1120	ev_default_loop (unsigned int flags)
		1121	#endif
		1122	{
		1123	if (sigpipe [0] == sigpipe [1])
		1124	if (pipe (sigpipe))
		1125	return 0;
		1126
		1127	if (!ev_default_loop_ptr)
		1128	{
		1129	#if EV_MULTIPLICITY
		1130	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1131	#else
		1132	ev_default_loop_ptr = 1;
		1133	#endif
		1134
		1135	loop_init (EV_A_ flags);
		1136
		1137	if (ev_backend (EV_A))
593	{	1138	{
594	ev_watcher_init (&sigev, sigcb);
595	ev_set_priority (&sigev, EV_MAXPRI);
596	siginit ();	1139	siginit (EV_A);
597		1140
598	#ifndef WIN32	1141	#ifndef _WIN32
599	ev_signal_init (&childev, childcb, SIGCHLD);	1142	ev_signal_init (&childev, childcb, SIGCHLD);
600	ev_set_priority (&childev, EV_MAXPRI);	1143	ev_set_priority (&childev, EV_MAXPRI);
601	ev_signal_start (&childev);	1144	ev_signal_start (EV_A_ &childev);
		1145	ev_unref (EV_A); /* child watcher should not keep loop alive */
602	#endif	1146	#endif
603	}	1147	}
		1148	else
		1149	ev_default_loop_ptr = 0;
604	}	1150	}
605		1151
606	return ev_method;	1152	return ev_default_loop_ptr;
		1153	}
		1154
		1155	void
		1156	ev_default_destroy (void)
		1157	{
		1158	#if EV_MULTIPLICITY
		1159	struct ev_loop *loop = ev_default_loop_ptr;
		1160	#endif
		1161
		1162	#ifndef _WIN32
		1163	ev_ref (EV_A); /* child watcher */
		1164	ev_signal_stop (EV_A_ &childev);
		1165	#endif
		1166
		1167	ev_ref (EV_A); /* signal watcher */
		1168	ev_io_stop (EV_A_ &sigev);
		1169
		1170	close (sigpipe [0]); sigpipe [0] = 0;
		1171	close (sigpipe [1]); sigpipe [1] = 0;
		1172
		1173	loop_destroy (EV_A);
		1174	}
		1175
		1176	void
		1177	ev_default_fork (void)
		1178	{
		1179	#if EV_MULTIPLICITY
		1180	struct ev_loop *loop = ev_default_loop_ptr;
		1181	#endif
		1182
		1183	if (backend)
		1184	postfork = 1;
607	}	1185	}
608		1186
609	/*****************************************************************************/	1187	/*****************************************************************************/
610		1188
611	void	1189	void
612	ev_fork_prepare (void)	1190	ev_invoke (EV_P_ void *w, int revents)
613	{	1191	{
614	/* nop */	1192	EV_CB_INVOKE ((W)w, revents);
615	}	1193	}
616		1194
617	void	1195	void inline_speed
618	ev_fork_parent (void)
619	{
620	/* nop */
621	}
622
623	void
624	ev_fork_child (void)
625	{
626	#if EV_USE_EPOLL
627	if (ev_method == EVMETHOD_EPOLL)
628	epoll_postfork_child ();
629	#endif
630
631	ev_io_stop (&sigev);
632	close (sigpipe [0]);
633	close (sigpipe [1]);
634	pipe (sigpipe);
635	siginit ();
636	}
637
638	/*****************************************************************************/
639
640	static void
641	call_pending (void)	1196	call_pending (EV_P)
642	{	1197	{
643	int pri;	1198	int pri;
644		1199
645	for (pri = NUMPRI; pri--; )	1200	for (pri = NUMPRI; pri--; )
646	while (pendingcnt [pri])	1201	while (pendingcnt [pri])
647	{	1202	{
648	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1203	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
649		1204
650	if (p->w)	1205	if (expect_true (p->w))
651	{	1206	{
		1207	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1208
652	p->w->pending = 0;	1209	p->w->pending = 0;
653	p->w->cb (p->w, p->events);	1210	EV_CB_INVOKE (p->w, p->events);
654	}	1211	}
655	}	1212	}
656	}	1213	}
657		1214
658	static void	1215	void inline_size
659	timers_reify (void)	1216	timers_reify (EV_P)
660	{	1217	{
661	while (timercnt && timers [0]->at <= now)	1218	while (timercnt && ((WT)timers [0])->at <= mn_now)
662	{	1219	{
663	struct ev_timer *w = timers [0];	1220	ev_timer *w = timers [0];
		1221
		1222	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
664		1223
665	/* first reschedule or stop timer */	1224	/* first reschedule or stop timer */
666	if (w->repeat)	1225	if (w->repeat)
667	{	1226	{
668	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1227	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1228
669	w->at = now + w->repeat;	1229	((WT)w)->at += w->repeat;
		1230	if (((WT)w)->at < mn_now)
		1231	((WT)w)->at = mn_now;
		1232
670	downheap ((WT *)timers, timercnt, 0);	1233	downheap ((WT *)timers, timercnt, 0);
671	}	1234	}
672	else	1235	else
673	ev_timer_stop (w); /* nonrepeating: stop timer */	1236	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
674		1237
675	event ((W)w, EV_TIMEOUT);	1238	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
676	}	1239	}
677	}	1240	}
678		1241
679	static void	1242	#if EV_PERIODIC_ENABLE
		1243	void inline_size
680	periodics_reify (void)	1244	periodics_reify (EV_P)
681	{	1245	{
682	while (periodiccnt && periodics [0]->at <= ev_now)	1246	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
683	{	1247	{
684	struct ev_periodic *w = periodics [0];	1248	ev_periodic *w = periodics [0];
		1249
		1250	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
685		1251
686	/* first reschedule or stop timer */	1252	/* first reschedule or stop timer */
687	if (w->interval)	1253	if (w->reschedule_cb)
688	{	1254	{
		1255	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1256	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1257	downheap ((WT *)periodics, periodiccnt, 0);
		1258	}
		1259	else if (w->interval)
		1260	{
689	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1261	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1262	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
690	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1263	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
691	downheap ((WT *)periodics, periodiccnt, 0);	1264	downheap ((WT *)periodics, periodiccnt, 0);
692	}	1265	}
693	else	1266	else
694	ev_periodic_stop (w); /* nonrepeating: stop timer */	1267	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
695		1268
696	event ((W)w, EV_PERIODIC);	1269	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
697	}	1270	}
698	}	1271	}
699		1272
700	static void	1273	static void noinline
701	periodics_reschedule (ev_tstamp diff)	1274	periodics_reschedule (EV_P)
702	{	1275	{
703	int i;	1276	int i;
704		1277
705	/* adjust periodics after time jump */	1278	/* adjust periodics after time jump */
706	for (i = 0; i < periodiccnt; ++i)	1279	for (i = 0; i < periodiccnt; ++i)
707	{	1280	{
708	struct ev_periodic *w = periodics [i];	1281	ev_periodic *w = periodics [i];
709		1282
		1283	if (w->reschedule_cb)
		1284	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
710	if (w->interval)	1285	else if (w->interval)
		1286	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1287	}
		1288
		1289	/* now rebuild the heap */
		1290	for (i = periodiccnt >> 1; i--; )
		1291	downheap ((WT *)periodics, periodiccnt, i);
		1292	}
		1293	#endif
		1294
		1295	#if EV_IDLE_ENABLE
		1296	void inline_size
		1297	idle_reify (EV_P)
		1298	{
		1299	if (expect_false (idleall))
		1300	{
		1301	int pri;
		1302
		1303	for (pri = NUMPRI; pri--; )
711	{	1304	{
712	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1305	if (pendingcnt [pri])
		1306	break;
713		1307
714	if (fabs (diff) >= 1e-4)	1308	if (idlecnt [pri])
715	{	1309	{
716	ev_periodic_stop (w);	1310	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
717	ev_periodic_start (w);	1311	break;
718
719	i = 0; /* restart loop, inefficient, but time jumps should be rare */
720	}	1312	}
721	}	1313	}
722	}	1314	}
723	}	1315	}
		1316	#endif
724		1317
725	static int	1318	void inline_speed
726	time_update_monotonic (void)	1319	time_update (EV_P_ ev_tstamp max_block)
727	{
728	now = get_clock ();
729
730	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
731	{
732	ev_now = now + diff;
733	return 0;
734	}
735	else
736	{
737	now_floor = now;
738	ev_now = ev_time ();
739	return 1;
740	}
741	}
742
743	static void
744	time_update (void)
745	{	1320	{
746	int i;	1321	int i;
747		1322
748	#if EV_USE_MONOTONIC	1323	#if EV_USE_MONOTONIC
749	if (expect_true (have_monotonic))	1324	if (expect_true (have_monotonic))
750	{	1325	{
751	if (time_update_monotonic ())	1326	ev_tstamp odiff = rtmn_diff;
		1327
		1328	mn_now = get_clock ();
		1329
		1330	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1331	/* interpolate in the meantime */
		1332	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
752	{	1333	{
753	ev_tstamp odiff = diff;	1334	ev_rt_now = rtmn_diff + mn_now;
754		1335	return;
755	for (i = 4; --i; ) /* loop a few times, before making important decisions */
756	{
757	diff = ev_now - now;
758
759	if (fabs (odiff - diff) < MIN_TIMEJUMP)
760	return; /* all is well */
761
762	ev_now = ev_time ();
763	now = get_clock ();
764	now_floor = now;
765	}
766
767	periodics_reschedule (diff - odiff);
768	/* no timer adjustment, as the monotonic clock doesn't jump */
769	}	1336	}
		1337
		1338	now_floor = mn_now;
		1339	ev_rt_now = ev_time ();
		1340
		1341	/* loop a few times, before making important decisions.
		1342	* on the choice of "4": one iteration isn't enough,
		1343	* in case we get preempted during the calls to
		1344	* ev_time and get_clock. a second call is almost guaranteed
		1345	* to succeed in that case, though. and looping a few more times
		1346	* doesn't hurt either as we only do this on time-jumps or
		1347	* in the unlikely event of having been preempted here.
		1348	*/
		1349	for (i = 4; --i; )
		1350	{
		1351	rtmn_diff = ev_rt_now - mn_now;
		1352
		1353	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1354	return; /* all is well */
		1355
		1356	ev_rt_now = ev_time ();
		1357	mn_now = get_clock ();
		1358	now_floor = mn_now;
		1359	}
		1360
		1361	# if EV_PERIODIC_ENABLE
		1362	periodics_reschedule (EV_A);
		1363	# endif
		1364	/* no timer adjustment, as the monotonic clock doesn't jump */
		1365	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
770	}	1366	}
771	else	1367	else
772	#endif	1368	#endif
773	{	1369	{
774	ev_now = ev_time ();	1370	ev_rt_now = ev_time ();
775		1371
776	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1372	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
777	{	1373	{
		1374	#if EV_PERIODIC_ENABLE
778	periodics_reschedule (ev_now - now);	1375	periodics_reschedule (EV_A);
779		1376	#endif
780	/* adjust timers. this is easy, as the offset is the same for all */	1377	/* adjust timers. this is easy, as the offset is the same for all of them */
781	for (i = 0; i < timercnt; ++i)	1378	for (i = 0; i < timercnt; ++i)
782	timers [i]->at += diff;	1379	((WT)timers [i])->at += ev_rt_now - mn_now;
783	}	1380	}
784		1381
785	now = ev_now;	1382	mn_now = ev_rt_now;
786	}	1383	}
787	}	1384	}
788		1385
789	int ev_loop_done;	1386	void
		1387	ev_ref (EV_P)
		1388	{
		1389	++activecnt;
		1390	}
790		1391
		1392	void
		1393	ev_unref (EV_P)
		1394	{
		1395	--activecnt;
		1396	}
		1397
		1398	static int loop_done;
		1399
		1400	void
791	void ev_loop (int flags)	1401	ev_loop (EV_P_ int flags)
792	{	1402	{
793	double block;
794	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1403	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1404	? EVUNLOOP_ONE
		1405	: EVUNLOOP_CANCEL;
		1406
		1407	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
795		1408
796	do	1409	do
797	{	1410	{
		1411	#ifndef _WIN32
		1412	if (expect_false (curpid)) /* penalise the forking check even more */
		1413	if (expect_false (getpid () != curpid))
		1414	{
		1415	curpid = getpid ();
		1416	postfork = 1;
		1417	}
		1418	#endif
		1419
		1420	#if EV_FORK_ENABLE
		1421	/* we might have forked, so queue fork handlers */
		1422	if (expect_false (postfork))
		1423	if (forkcnt)
		1424	{
		1425	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1426	call_pending (EV_A);
		1427	}
		1428	#endif
		1429
798	/* queue check watchers (and execute them) */	1430	/* queue prepare watchers (and execute them) */
799	if (expect_false (preparecnt))	1431	if (expect_false (preparecnt))
800	{	1432	{
801	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1433	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
802	call_pending ();	1434	call_pending (EV_A);
803	}	1435	}
804		1436
		1437	if (expect_false (!activecnt))
		1438	break;
		1439
		1440	/* we might have forked, so reify kernel state if necessary */
		1441	if (expect_false (postfork))
		1442	loop_fork (EV_A);
		1443
805	/* update fd-related kernel structures */	1444	/* update fd-related kernel structures */
806	fd_reify ();	1445	fd_reify (EV_A);
807		1446
808	/* calculate blocking time */	1447	/* calculate blocking time */
		1448	{
		1449	ev_tstamp block;
809		1450
810	/* we only need this for !monotonic clockor timers, but as we basically	1451	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
811	always have timers, we just calculate it always */	1452	block = 0.; /* do not block at all */
812	#if EV_USE_MONOTONIC
813	if (expect_true (have_monotonic))
814	time_update_monotonic ();
815	else	1453	else
816	#endif
817	{	1454	{
818	ev_now = ev_time ();	1455	/* update time to cancel out callback processing overhead */
819	now = ev_now;	1456	time_update (EV_A_ 1e100);
820	}
821		1457
822	if (flags & EVLOOP_NONBLOCK || idlecnt)
823	block = 0.;
824	else
825	{
826	block = MAX_BLOCKTIME;	1458	block = MAX_BLOCKTIME;
827		1459
828	if (timercnt)	1460	if (timercnt)
829	{	1461	{
830	ev_tstamp to = timers [0]->at - now + method_fudge;	1462	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
831	if (block > to) block = to;	1463	if (block > to) block = to;
832	}	1464	}
833		1465
		1466	#if EV_PERIODIC_ENABLE
834	if (periodiccnt)	1467	if (periodiccnt)
835	{	1468	{
836	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1469	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
837	if (block > to) block = to;	1470	if (block > to) block = to;
838	}	1471	}
		1472	#endif
839		1473
840	if (block < 0.) block = 0.;	1474	if (expect_false (block < 0.)) block = 0.;
841	}	1475	}
842		1476
843	method_poll (block);	1477	++loop_count;
		1478	backend_poll (EV_A_ block);
844		1479
845	/* update ev_now, do magic */	1480	/* update ev_rt_now, do magic */
846	time_update ();	1481	time_update (EV_A_ block);
		1482	}
847		1483
848	/* queue pending timers and reschedule them */	1484	/* queue pending timers and reschedule them */
849	timers_reify (); /* relative timers called last */	1485	timers_reify (EV_A); /* relative timers called last */
		1486	#if EV_PERIODIC_ENABLE
850	periodics_reify (); /* absolute timers called first */	1487	periodics_reify (EV_A); /* absolute timers called first */
		1488	#endif
851		1489
		1490	#if EV_IDLE_ENABLE
852	/* queue idle watchers unless io or timers are pending */	1491	/* queue idle watchers unless other events are pending */
853	if (!pendingcnt)	1492	idle_reify (EV_A);
854	queue_events ((W *)idles, idlecnt, EV_IDLE);	1493	#endif
855		1494
856	/* queue check watchers, to be executed first */	1495	/* queue check watchers, to be executed first */
857	if (checkcnt)	1496	if (expect_false (checkcnt))
858	queue_events ((W *)checks, checkcnt, EV_CHECK);	1497	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
859		1498
860	call_pending ();	1499	call_pending (EV_A);
861	}
862	while (!ev_loop_done);
863		1500
864	if (ev_loop_done != 2)	1501	}
		1502	while (expect_true (activecnt && !loop_done));
		1503
		1504	if (loop_done == EVUNLOOP_ONE)
		1505	loop_done = EVUNLOOP_CANCEL;
		1506	}
		1507
		1508	void
		1509	ev_unloop (EV_P_ int how)
		1510	{
865	ev_loop_done = 0;	1511	loop_done = how;
866	}	1512	}
867		1513
868	/*****************************************************************************/	1514	/*****************************************************************************/
869		1515
870	static void	1516	void inline_size
871	wlist_add (WL *head, WL elem)	1517	wlist_add (WL *head, WL elem)
872	{	1518	{
873	elem->next = *head;	1519	elem->next = *head;
874	*head = elem;	1520	*head = elem;
875	}	1521	}
876		1522
877	static void	1523	void inline_size
878	wlist_del (WL *head, WL elem)	1524	wlist_del (WL *head, WL elem)
879	{	1525	{
880	while (*head)	1526	while (*head)
881	{	1527	{
882	if (*head == elem)	1528	if (*head == elem)
…		…
887		1533
888	head = &(*head)->next;	1534	head = &(*head)->next;
889	}	1535	}
890	}	1536	}
891		1537
892	static void	1538	void inline_speed
893	ev_clear_pending (W w)	1539	clear_pending (EV_P_ W w)
894	{	1540	{
895	if (w->pending)	1541	if (w->pending)
896	{	1542	{
897	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1543	pendings [ABSPRI (w)][w->pending - 1].w = 0;
898	w->pending = 0;	1544	w->pending = 0;
899	}	1545	}
900	}	1546	}
901		1547
902	static void	1548	int
		1549	ev_clear_pending (EV_P_ void *w)
		1550	{
		1551	W w_ = (W)w;
		1552	int pending = w_->pending;
		1553
		1554	if (expect_true (pending))
		1555	{
		1556	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1557	w_->pending = 0;
		1558	p->w = 0;
		1559	return p->events;
		1560	}
		1561	else
		1562	return 0;
		1563	}
		1564
		1565	void inline_size
		1566	pri_adjust (EV_P_ W w)
		1567	{
		1568	int pri = w->priority;
		1569	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1570	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1571	w->priority = pri;
		1572	}
		1573
		1574	void inline_speed
903	ev_start (W w, int active)	1575	ev_start (EV_P_ W w, int active)
904	{	1576	{
905	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1577	pri_adjust (EV_A_ w);
906	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
907
908	w->active = active;	1578	w->active = active;
		1579	ev_ref (EV_A);
909	}	1580	}
910		1581
911	static void	1582	void inline_size
912	ev_stop (W w)	1583	ev_stop (EV_P_ W w)
913	{	1584	{
		1585	ev_unref (EV_A);
914	w->active = 0;	1586	w->active = 0;
915	}	1587	}
916		1588
917	/*****************************************************************************/	1589	/*****************************************************************************/
918		1590
919	void	1591	void noinline
920	ev_io_start (struct ev_io *w)	1592	ev_io_start (EV_P_ ev_io *w)
921	{	1593	{
922	int fd = w->fd;	1594	int fd = w->fd;
923		1595
924	if (ev_is_active (w))	1596	if (expect_false (ev_is_active (w)))
925	return;	1597	return;
926		1598
927	assert (("ev_io_start called with negative fd", fd >= 0));	1599	assert (("ev_io_start called with negative fd", fd >= 0));
928		1600
929	ev_start ((W)w, 1);	1601	ev_start (EV_A_ (W)w, 1);
930	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1602	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
931	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1603	wlist_add ((WL *)&anfds[fd].head, (WL)w);
932		1604
933	fd_change (fd);	1605	fd_change (EV_A_ fd);
934	}	1606	}
935		1607
936	void	1608	void noinline
937	ev_io_stop (struct ev_io *w)	1609	ev_io_stop (EV_P_ ev_io *w)
938	{	1610	{
939	ev_clear_pending ((W)w);	1611	clear_pending (EV_A_ (W)w);
940	if (!ev_is_active (w))	1612	if (expect_false (!ev_is_active (w)))
941	return;	1613	return;
		1614
		1615	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
942		1616
943	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1617	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
944	ev_stop ((W)w);	1618	ev_stop (EV_A_ (W)w);
945		1619
946	fd_change (w->fd);	1620	fd_change (EV_A_ w->fd);
947	}	1621	}
948		1622
949	void	1623	void noinline
950	ev_timer_start (struct ev_timer *w)	1624	ev_timer_start (EV_P_ ev_timer *w)
951	{	1625	{
952	if (ev_is_active (w))	1626	if (expect_false (ev_is_active (w)))
953	return;	1627	return;
954		1628
955	w->at += now;	1629	((WT)w)->at += mn_now;
956		1630
957	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1631	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
958		1632
959	ev_start ((W)w, ++timercnt);	1633	ev_start (EV_A_ (W)w, ++timercnt);
960	array_needsize (timers, timermax, timercnt, );	1634	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
961	timers [timercnt - 1] = w;	1635	timers [timercnt - 1] = w;
962	upheap ((WT *)timers, timercnt - 1);	1636	upheap ((WT *)timers, timercnt - 1);
963	}
964		1637
965	void	1638	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1639	}
		1640
		1641	void noinline
966	ev_timer_stop (struct ev_timer *w)	1642	ev_timer_stop (EV_P_ ev_timer *w)
967	{	1643	{
968	ev_clear_pending ((W)w);	1644	clear_pending (EV_A_ (W)w);
969	if (!ev_is_active (w))	1645	if (expect_false (!ev_is_active (w)))
970	return;	1646	return;
971		1647
972	if (w->active < timercnt--)	1648	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1649
		1650	{
		1651	int active = ((W)w)->active;
		1652
		1653	if (expect_true (--active < --timercnt))
973	{	1654	{
974	timers [w->active - 1] = timers [timercnt];	1655	timers [active] = timers [timercnt];
975	downheap ((WT *)timers, timercnt, w->active - 1);	1656	adjustheap ((WT *)timers, timercnt, active);
976	}	1657	}
		1658	}
977		1659
978	w->at = w->repeat;	1660	((WT)w)->at -= mn_now;
979		1661
980	ev_stop ((W)w);	1662	ev_stop (EV_A_ (W)w);
981	}	1663	}
982		1664
983	void	1665	void noinline
984	ev_timer_again (struct ev_timer *w)	1666	ev_timer_again (EV_P_ ev_timer *w)
985	{	1667	{
986	if (ev_is_active (w))	1668	if (ev_is_active (w))
987	{	1669	{
988	if (w->repeat)	1670	if (w->repeat)
989	{	1671	{
990	w->at = now + w->repeat;	1672	((WT)w)->at = mn_now + w->repeat;
991	downheap ((WT *)timers, timercnt, w->active - 1);	1673	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
992	}	1674	}
993	else	1675	else
994	ev_timer_stop (w);	1676	ev_timer_stop (EV_A_ w);
995	}	1677	}
996	else if (w->repeat)	1678	else if (w->repeat)
		1679	{
		1680	w->at = w->repeat;
997	ev_timer_start (w);	1681	ev_timer_start (EV_A_ w);
		1682	}
998	}	1683	}
999		1684
1000	void	1685	#if EV_PERIODIC_ENABLE
		1686	void noinline
1001	ev_periodic_start (struct ev_periodic *w)	1687	ev_periodic_start (EV_P_ ev_periodic *w)
1002	{	1688	{
1003	if (ev_is_active (w))	1689	if (expect_false (ev_is_active (w)))
1004	return;	1690	return;
1005		1691
		1692	if (w->reschedule_cb)
		1693	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1694	else if (w->interval)
		1695	{
1006	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1696	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1007
1008	/* this formula differs from the one in periodic_reify because we do not always round up */	1697	/* this formula differs from the one in periodic_reify because we do not always round up */
1009	if (w->interval)
1010	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1698	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1699	}
		1700	else
		1701	((WT)w)->at = w->offset;
1011		1702
1012	ev_start ((W)w, ++periodiccnt);	1703	ev_start (EV_A_ (W)w, ++periodiccnt);
1013	array_needsize (periodics, periodicmax, periodiccnt, );	1704	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1014	periodics [periodiccnt - 1] = w;	1705	periodics [periodiccnt - 1] = w;
1015	upheap ((WT *)periodics, periodiccnt - 1);	1706	upheap ((WT *)periodics, periodiccnt - 1);
1016	}
1017		1707
1018	void	1708	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1709	}
		1710
		1711	void noinline
1019	ev_periodic_stop (struct ev_periodic *w)	1712	ev_periodic_stop (EV_P_ ev_periodic *w)
1020	{	1713	{
1021	ev_clear_pending ((W)w);	1714	clear_pending (EV_A_ (W)w);
1022	if (!ev_is_active (w))	1715	if (expect_false (!ev_is_active (w)))
1023	return;	1716	return;
1024		1717
1025	if (w->active < periodiccnt--)	1718	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1719
		1720	{
		1721	int active = ((W)w)->active;
		1722
		1723	if (expect_true (--active < --periodiccnt))
1026	{	1724	{
1027	periodics [w->active - 1] = periodics [periodiccnt];	1725	periodics [active] = periodics [periodiccnt];
1028	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1726	adjustheap ((WT *)periodics, periodiccnt, active);
1029	}	1727	}
		1728	}
1030		1729
1031	ev_stop ((W)w);	1730	ev_stop (EV_A_ (W)w);
1032	}	1731	}
		1732
		1733	void noinline
		1734	ev_periodic_again (EV_P_ ev_periodic *w)
		1735	{
		1736	/* TODO: use adjustheap and recalculation */
		1737	ev_periodic_stop (EV_A_ w);
		1738	ev_periodic_start (EV_A_ w);
		1739	}
		1740	#endif
1033		1741
1034	#ifndef SA_RESTART	1742	#ifndef SA_RESTART
1035	# define SA_RESTART 0	1743	# define SA_RESTART 0
1036	#endif	1744	#endif
1037		1745
1038	void	1746	void noinline
1039	ev_signal_start (struct ev_signal *w)	1747	ev_signal_start (EV_P_ ev_signal *w)
1040	{	1748	{
		1749	#if EV_MULTIPLICITY
		1750	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1751	#endif
1041	if (ev_is_active (w))	1752	if (expect_false (ev_is_active (w)))
1042	return;	1753	return;
1043		1754
1044	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1755	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1045		1756
1046	ev_start ((W)w, 1);	1757	ev_start (EV_A_ (W)w, 1);
1047	array_needsize (signals, signalmax, w->signum, signals_init);	1758	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1048	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1759	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1049		1760
1050	if (!w->next)	1761	if (!((WL)w)->next)
1051	{	1762	{
		1763	#if _WIN32
		1764	signal (w->signum, sighandler);
		1765	#else
1052	struct sigaction sa;	1766	struct sigaction sa;
1053	sa.sa_handler = sighandler;	1767	sa.sa_handler = sighandler;
1054	sigfillset (&sa.sa_mask);	1768	sigfillset (&sa.sa_mask);
1055	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1769	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1056	sigaction (w->signum, &sa, 0);	1770	sigaction (w->signum, &sa, 0);
		1771	#endif
1057	}	1772	}
1058	}	1773	}
1059		1774
1060	void	1775	void noinline
1061	ev_signal_stop (struct ev_signal *w)	1776	ev_signal_stop (EV_P_ ev_signal *w)
1062	{	1777	{
1063	ev_clear_pending ((W)w);	1778	clear_pending (EV_A_ (W)w);
1064	if (!ev_is_active (w))	1779	if (expect_false (!ev_is_active (w)))
1065	return;	1780	return;
1066		1781
1067	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1782	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1068	ev_stop ((W)w);	1783	ev_stop (EV_A_ (W)w);
1069		1784
1070	if (!signals [w->signum - 1].head)	1785	if (!signals [w->signum - 1].head)
1071	signal (w->signum, SIG_DFL);	1786	signal (w->signum, SIG_DFL);
1072	}	1787	}
1073		1788
1074	void	1789	void
1075	ev_idle_start (struct ev_idle *w)	1790	ev_child_start (EV_P_ ev_child *w)
1076	{	1791	{
		1792	#if EV_MULTIPLICITY
		1793	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1794	#endif
1077	if (ev_is_active (w))	1795	if (expect_false (ev_is_active (w)))
1078	return;	1796	return;
1079		1797
1080	ev_start ((W)w, ++idlecnt);	1798	ev_start (EV_A_ (W)w, 1);
1081	array_needsize (idles, idlemax, idlecnt, );	1799	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1082	idles [idlecnt - 1] = w;
1083	}	1800	}
1084		1801
1085	void	1802	void
1086	ev_idle_stop (struct ev_idle *w)	1803	ev_child_stop (EV_P_ ev_child *w)
1087	{	1804	{
1088	ev_clear_pending ((W)w);	1805	clear_pending (EV_A_ (W)w);
1089	if (ev_is_active (w))	1806	if (expect_false (!ev_is_active (w)))
1090	return;	1807	return;
1091		1808
1092	idles [w->active - 1] = idles [--idlecnt];	1809	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1093	ev_stop ((W)w);	1810	ev_stop (EV_A_ (W)w);
1094	}	1811	}
1095		1812
		1813	#if EV_STAT_ENABLE
		1814
		1815	# ifdef _WIN32
		1816	# undef lstat
		1817	# define lstat(a,b) _stati64 (a,b)
		1818	# endif
		1819
		1820	#define DEF_STAT_INTERVAL 5.0074891
		1821	#define MIN_STAT_INTERVAL 0.1074891
		1822
		1823	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1824
		1825	#if EV_USE_INOTIFY
		1826	# define EV_INOTIFY_BUFSIZE 8192
		1827
		1828	static void noinline
		1829	infy_add (EV_P_ ev_stat *w)
		1830	{
		1831	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);
		1832
		1833	if (w->wd < 0)
		1834	{
		1835	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1836
		1837	/* monitor some parent directory for speedup hints */
		1838	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1839	{
		1840	char path [4096];
		1841	strcpy (path, w->path);
		1842
		1843	do
		1844	{
		1845	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1846	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1847
		1848	char *pend = strrchr (path, '/');
		1849
		1850	if (!pend)
		1851	break; /* whoops, no '/', complain to your admin */
		1852
		1853	*pend = 0;
		1854	w->wd = inotify_add_watch (fs_fd, path, mask);
		1855	}
		1856	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1857	}
		1858	}
		1859	else
		1860	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1861
		1862	if (w->wd >= 0)
		1863	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1864	}
		1865
		1866	static void noinline
		1867	infy_del (EV_P_ ev_stat *w)
		1868	{
		1869	int slot;
		1870	int wd = w->wd;
		1871
		1872	if (wd < 0)
		1873	return;
		1874
		1875	w->wd = -2;
		1876	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1877	wlist_del (&fs_hash [slot].head, (WL)w);
		1878
		1879	/* remove this watcher, if others are watching it, they will rearm */
		1880	inotify_rm_watch (fs_fd, wd);
		1881	}
		1882
		1883	static void noinline
		1884	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1885	{
		1886	if (slot < 0)
		1887	/* overflow, need to check for all hahs slots */
		1888	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1889	infy_wd (EV_A_ slot, wd, ev);
		1890	else
		1891	{
		1892	WL w_;
		1893
		1894	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1895	{
		1896	ev_stat *w = (ev_stat *)w_;
		1897	w_ = w_->next; /* lets us remove this watcher and all before it */
		1898
		1899	if (w->wd == wd || wd == -1)
		1900	{
		1901	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1902	{
		1903	w->wd = -1;
		1904	infy_add (EV_A_ w); /* re-add, no matter what */
		1905	}
		1906
		1907	stat_timer_cb (EV_A_ &w->timer, 0);
		1908	}
		1909	}
		1910	}
		1911	}
		1912
		1913	static void
		1914	infy_cb (EV_P_ ev_io *w, int revents)
		1915	{
		1916	char buf [EV_INOTIFY_BUFSIZE];
		1917	struct inotify_event *ev = (struct inotify_event *)buf;
		1918	int ofs;
		1919	int len = read (fs_fd, buf, sizeof (buf));
		1920
		1921	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1922	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1923	}
		1924
		1925	void inline_size
		1926	infy_init (EV_P)
		1927	{
		1928	if (fs_fd != -2)
		1929	return;
		1930
		1931	fs_fd = inotify_init ();
		1932
		1933	if (fs_fd >= 0)
		1934	{
		1935	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1936	ev_set_priority (&fs_w, EV_MAXPRI);
		1937	ev_io_start (EV_A_ &fs_w);
		1938	}
		1939	}
		1940
		1941	void inline_size
		1942	infy_fork (EV_P)
		1943	{
		1944	int slot;
		1945
		1946	if (fs_fd < 0)
		1947	return;
		1948
		1949	close (fs_fd);
		1950	fs_fd = inotify_init ();
		1951
		1952	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1953	{
		1954	WL w_ = fs_hash [slot].head;
		1955	fs_hash [slot].head = 0;
		1956
		1957	while (w_)
		1958	{
		1959	ev_stat *w = (ev_stat *)w_;
		1960	w_ = w_->next; /* lets us add this watcher */
		1961
		1962	w->wd = -1;
		1963
		1964	if (fs_fd >= 0)
		1965	infy_add (EV_A_ w); /* re-add, no matter what */
		1966	else
		1967	ev_timer_start (EV_A_ &w->timer);
		1968	}
		1969
		1970	}
		1971	}
		1972
		1973	#endif
		1974
1096	void	1975	void
		1976	ev_stat_stat (EV_P_ ev_stat *w)
		1977	{
		1978	if (lstat (w->path, &w->attr) < 0)
		1979	w->attr.st_nlink = 0;
		1980	else if (!w->attr.st_nlink)
		1981	w->attr.st_nlink = 1;
		1982	}
		1983
		1984	static void noinline
		1985	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1986	{
		1987	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1988
		1989	/* we copy this here each the time so that */
		1990	/* prev has the old value when the callback gets invoked */
		1991	w->prev = w->attr;
		1992	ev_stat_stat (EV_A_ w);
		1993
		1994	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		1995	if (
		1996	w->prev.st_dev != w->attr.st_dev
		1997	|| w->prev.st_ino != w->attr.st_ino
		1998	|| w->prev.st_mode != w->attr.st_mode
		1999	|| w->prev.st_nlink != w->attr.st_nlink
		2000	|| w->prev.st_uid != w->attr.st_uid
		2001	|| w->prev.st_gid != w->attr.st_gid
		2002	|| w->prev.st_rdev != w->attr.st_rdev
		2003	|| w->prev.st_size != w->attr.st_size
		2004	|| w->prev.st_atime != w->attr.st_atime
		2005	|| w->prev.st_mtime != w->attr.st_mtime
		2006	|| w->prev.st_ctime != w->attr.st_ctime
		2007	) {
		2008	#if EV_USE_INOTIFY
		2009	infy_del (EV_A_ w);
		2010	infy_add (EV_A_ w);
		2011	ev_stat_stat (EV_A_ w); /* avoid race... */
		2012	#endif
		2013
		2014	ev_feed_event (EV_A_ w, EV_STAT);
		2015	}
		2016	}
		2017
		2018	void
		2019	ev_stat_start (EV_P_ ev_stat *w)
		2020	{
		2021	if (expect_false (ev_is_active (w)))
		2022	return;
		2023
		2024	/* since we use memcmp, we need to clear any padding data etc. */
		2025	memset (&w->prev, 0, sizeof (ev_statdata));
		2026	memset (&w->attr, 0, sizeof (ev_statdata));
		2027
		2028	ev_stat_stat (EV_A_ w);
		2029
		2030	if (w->interval < MIN_STAT_INTERVAL)
		2031	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2032
		2033	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2034	ev_set_priority (&w->timer, ev_priority (w));
		2035
		2036	#if EV_USE_INOTIFY
		2037	infy_init (EV_A);
		2038
		2039	if (fs_fd >= 0)
		2040	infy_add (EV_A_ w);
		2041	else
		2042	#endif
		2043	ev_timer_start (EV_A_ &w->timer);
		2044
		2045	ev_start (EV_A_ (W)w, 1);
		2046	}
		2047
		2048	void
		2049	ev_stat_stop (EV_P_ ev_stat *w)
		2050	{
		2051	clear_pending (EV_A_ (W)w);
		2052	if (expect_false (!ev_is_active (w)))
		2053	return;
		2054
		2055	#if EV_USE_INOTIFY
		2056	infy_del (EV_A_ w);
		2057	#endif
		2058	ev_timer_stop (EV_A_ &w->timer);
		2059
		2060	ev_stop (EV_A_ (W)w);
		2061	}
		2062	#endif
		2063
		2064	#if EV_IDLE_ENABLE
		2065	void
		2066	ev_idle_start (EV_P_ ev_idle *w)
		2067	{
		2068	if (expect_false (ev_is_active (w)))
		2069	return;
		2070
		2071	pri_adjust (EV_A_ (W)w);
		2072
		2073	{
		2074	int active = ++idlecnt [ABSPRI (w)];
		2075
		2076	++idleall;
		2077	ev_start (EV_A_ (W)w, active);
		2078
		2079	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2080	idles [ABSPRI (w)][active - 1] = w;
		2081	}
		2082	}
		2083
		2084	void
		2085	ev_idle_stop (EV_P_ ev_idle *w)
		2086	{
		2087	clear_pending (EV_A_ (W)w);
		2088	if (expect_false (!ev_is_active (w)))
		2089	return;
		2090
		2091	{
		2092	int active = ((W)w)->active;
		2093
		2094	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2095	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2096
		2097	ev_stop (EV_A_ (W)w);
		2098	--idleall;
		2099	}
		2100	}
		2101	#endif
		2102
		2103	void
1097	ev_prepare_start (struct ev_prepare *w)	2104	ev_prepare_start (EV_P_ ev_prepare *w)
1098	{	2105	{
1099	if (ev_is_active (w))	2106	if (expect_false (ev_is_active (w)))
1100	return;	2107	return;
1101		2108
1102	ev_start ((W)w, ++preparecnt);	2109	ev_start (EV_A_ (W)w, ++preparecnt);
1103	array_needsize (prepares, preparemax, preparecnt, );	2110	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1104	prepares [preparecnt - 1] = w;	2111	prepares [preparecnt - 1] = w;
1105	}	2112	}
1106		2113
1107	void	2114	void
1108	ev_prepare_stop (struct ev_prepare *w)	2115	ev_prepare_stop (EV_P_ ev_prepare *w)
1109	{	2116	{
1110	ev_clear_pending ((W)w);	2117	clear_pending (EV_A_ (W)w);
1111	if (ev_is_active (w))	2118	if (expect_false (!ev_is_active (w)))
1112	return;	2119	return;
1113		2120
		2121	{
		2122	int active = ((W)w)->active;
1114	prepares [w->active - 1] = prepares [--preparecnt];	2123	prepares [active - 1] = prepares [--preparecnt];
		2124	((W)prepares [active - 1])->active = active;
		2125	}
		2126
1115	ev_stop ((W)w);	2127	ev_stop (EV_A_ (W)w);
1116	}	2128	}
1117		2129
1118	void	2130	void
1119	ev_check_start (struct ev_check *w)	2131	ev_check_start (EV_P_ ev_check *w)
1120	{	2132	{
1121	if (ev_is_active (w))	2133	if (expect_false (ev_is_active (w)))
1122	return;	2134	return;
1123		2135
1124	ev_start ((W)w, ++checkcnt);	2136	ev_start (EV_A_ (W)w, ++checkcnt);
1125	array_needsize (checks, checkmax, checkcnt, );	2137	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1126	checks [checkcnt - 1] = w;	2138	checks [checkcnt - 1] = w;
1127	}	2139	}
1128		2140
1129	void	2141	void
1130	ev_check_stop (struct ev_check *w)	2142	ev_check_stop (EV_P_ ev_check *w)
1131	{	2143	{
1132	ev_clear_pending ((W)w);	2144	clear_pending (EV_A_ (W)w);
1133	if (ev_is_active (w))	2145	if (expect_false (!ev_is_active (w)))
1134	return;	2146	return;
1135		2147
		2148	{
		2149	int active = ((W)w)->active;
1136	checks [w->active - 1] = checks [--checkcnt];	2150	checks [active - 1] = checks [--checkcnt];
		2151	((W)checks [active - 1])->active = active;
		2152	}
		2153
1137	ev_stop ((W)w);	2154	ev_stop (EV_A_ (W)w);
1138	}	2155	}
1139		2156
1140	void	2157	#if EV_EMBED_ENABLE
1141	ev_child_start (struct ev_child *w)	2158	void noinline
		2159	ev_embed_sweep (EV_P_ ev_embed *w)
1142	{	2160	{
		2161	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2162	}
		2163
		2164	static void
		2165	embed_cb (EV_P_ ev_io *io, int revents)
		2166	{
		2167	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2168
1143	if (ev_is_active (w))	2169	if (ev_cb (w))
1144	return;	2170	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2171	else
		2172	ev_embed_sweep (loop, w);
		2173	}
1145		2174
		2175	void
		2176	ev_embed_start (EV_P_ ev_embed *w)
		2177	{
		2178	if (expect_false (ev_is_active (w)))
		2179	return;
		2180
		2181	{
		2182	struct ev_loop *loop = w->loop;
		2183	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2184	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2185	}
		2186
		2187	ev_set_priority (&w->io, ev_priority (w));
		2188	ev_io_start (EV_A_ &w->io);
		2189
1146	ev_start ((W)w, 1);	2190	ev_start (EV_A_ (W)w, 1);
1147	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1148	}	2191	}
1149		2192
1150	void	2193	void
1151	ev_child_stop (struct ev_child *w)	2194	ev_embed_stop (EV_P_ ev_embed *w)
1152	{	2195	{
1153	ev_clear_pending ((W)w);	2196	clear_pending (EV_A_ (W)w);
1154	if (ev_is_active (w))	2197	if (expect_false (!ev_is_active (w)))
1155	return;	2198	return;
1156		2199
1157	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2200	ev_io_stop (EV_A_ &w->io);
		2201
1158	ev_stop ((W)w);	2202	ev_stop (EV_A_ (W)w);
1159	}	2203	}
		2204	#endif
		2205
		2206	#if EV_FORK_ENABLE
		2207	void
		2208	ev_fork_start (EV_P_ ev_fork *w)
		2209	{
		2210	if (expect_false (ev_is_active (w)))
		2211	return;
		2212
		2213	ev_start (EV_A_ (W)w, ++forkcnt);
		2214	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2215	forks [forkcnt - 1] = w;
		2216	}
		2217
		2218	void
		2219	ev_fork_stop (EV_P_ ev_fork *w)
		2220	{
		2221	clear_pending (EV_A_ (W)w);
		2222	if (expect_false (!ev_is_active (w)))
		2223	return;
		2224
		2225	{
		2226	int active = ((W)w)->active;
		2227	forks [active - 1] = forks [--forkcnt];
		2228	((W)forks [active - 1])->active = active;
		2229	}
		2230
		2231	ev_stop (EV_A_ (W)w);
		2232	}
		2233	#endif
1160		2234
1161	/*****************************************************************************/	2235	/*****************************************************************************/
1162		2236
1163	struct ev_once	2237	struct ev_once
1164	{	2238	{
1165	struct ev_io io;	2239	ev_io io;
1166	struct ev_timer to;	2240	ev_timer to;
1167	void (*cb)(int revents, void *arg);	2241	void (*cb)(int revents, void *arg);
1168	void *arg;	2242	void *arg;
1169	};	2243	};
1170		2244
1171	static void	2245	static void
1172	once_cb (struct ev_once *once, int revents)	2246	once_cb (EV_P_ struct ev_once *once, int revents)
1173	{	2247	{
1174	void (*cb)(int revents, void *arg) = once->cb;	2248	void (*cb)(int revents, void *arg) = once->cb;
1175	void *arg = once->arg;	2249	void *arg = once->arg;
1176		2250
1177	ev_io_stop (&once->io);	2251	ev_io_stop (EV_A_ &once->io);
1178	ev_timer_stop (&once->to);	2252	ev_timer_stop (EV_A_ &once->to);
1179	free (once);	2253	ev_free (once);
1180		2254
1181	cb (revents, arg);	2255	cb (revents, arg);
1182	}	2256	}
1183		2257
1184	static void	2258	static void
1185	once_cb_io (struct ev_io *w, int revents)	2259	once_cb_io (EV_P_ ev_io *w, int revents)
1186	{	2260	{
1187	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2261	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1188	}	2262	}
1189		2263
1190	static void	2264	static void
1191	once_cb_to (struct ev_timer *w, int revents)	2265	once_cb_to (EV_P_ ev_timer *w, int revents)
1192	{	2266	{
1193	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2267	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1194	}	2268	}
1195		2269
1196	void	2270	void
1197	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2271	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1198	{	2272	{
1199	struct ev_once *once = malloc (sizeof (struct ev_once));	2273	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1200		2274
1201	if (!once)	2275	if (expect_false (!once))
		2276	{
1202	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2277	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1203	else	2278	return;
1204	{	2279	}
		2280
1205	once->cb = cb;	2281	once->cb = cb;
1206	once->arg = arg;	2282	once->arg = arg;
1207		2283
1208	ev_watcher_init (&once->io, once_cb_io);	2284	ev_init (&once->io, once_cb_io);
1209	if (fd >= 0)	2285	if (fd >= 0)
1210	{	2286	{
1211	ev_io_set (&once->io, fd, events);	2287	ev_io_set (&once->io, fd, events);
1212	ev_io_start (&once->io);	2288	ev_io_start (EV_A_ &once->io);
1213	}	2289	}
1214		2290
1215	ev_watcher_init (&once->to, once_cb_to);	2291	ev_init (&once->to, once_cb_to);
1216	if (timeout >= 0.)	2292	if (timeout >= 0.)
1217	{	2293	{
1218	ev_timer_set (&once->to, timeout, 0.);	2294	ev_timer_set (&once->to, timeout, 0.);
1219	ev_timer_start (&once->to);	2295	ev_timer_start (EV_A_ &once->to);
1220	}
1221	}
1222	}
1223
1224	/*****************************************************************************/
1225
1226	#if 0
1227
1228	struct ev_io wio;
1229
1230	static void
1231	sin_cb (struct ev_io *w, int revents)
1232	{
1233	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1234	}
1235
1236	static void
1237	ocb (struct ev_timer *w, int revents)
1238	{
1239	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1240	ev_timer_stop (w);
1241	ev_timer_start (w);
1242	}
1243
1244	static void
1245	scb (struct ev_signal *w, int revents)
1246	{
1247	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1248	ev_io_stop (&wio);
1249	ev_io_start (&wio);
1250	}
1251
1252	static void
1253	gcb (struct ev_signal *w, int revents)
1254	{
1255	fprintf (stderr, "generic %x\n", revents);
1256
1257	}
1258
1259	int main (void)
1260	{
1261	ev_init (0);
1262
1263	ev_io_init (&wio, sin_cb, 0, EV_READ);
1264	ev_io_start (&wio);
1265
1266	struct ev_timer t[10000];
1267
1268	#if 0
1269	int i;
1270	for (i = 0; i < 10000; ++i)
1271	{	2296	}
1272	struct ev_timer *w = t + i;
1273	ev_watcher_init (w, ocb, i);
1274	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1275	ev_timer_start (w);
1276	if (drand48 () < 0.5)
1277	ev_timer_stop (w);
1278	}
1279	#endif
1280
1281	struct ev_timer t1;
1282	ev_timer_init (&t1, ocb, 5, 10);
1283	ev_timer_start (&t1);
1284
1285	struct ev_signal sig;
1286	ev_signal_init (&sig, scb, SIGQUIT);
1287	ev_signal_start (&sig);
1288
1289	struct ev_check cw;
1290	ev_check_init (&cw, gcb);
1291	ev_check_start (&cw);
1292
1293	struct ev_idle iw;
1294	ev_idle_init (&iw, gcb);
1295	ev_idle_start (&iw);
1296
1297	ev_loop (0);
1298
1299	return 0;
1300	}	2297	}
1301		2298
		2299	#ifdef __cplusplus
		2300	}
1302	#endif	2301	#endif
1303		2302
1304
1305
1306

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