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

Comparing libev/ev.c (file contents):
Revision 1.168 by root, Sat Dec 8 14:12:07 2007 UTC vs.
Revision 1.236 by root, Wed May 7 14:46:22 2008 UTC

…		…
1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.
30	*/	38	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
35		43
		44	/* this big block deduces configuration from config.h */
36	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
37	# ifdef EV_CONFIG_H	46	# ifdef EV_CONFIG_H
38	# include EV_CONFIG_H	47	# include EV_CONFIG_H
39	# else	48	# else
40	# include "config.h"	49	# include "config.h"
51	# ifndef EV_USE_MONOTONIC	60	# ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 0	61	# define EV_USE_MONOTONIC 0
53	# endif	62	# endif
54	# ifndef EV_USE_REALTIME	63	# ifndef EV_USE_REALTIME
55	# define EV_USE_REALTIME 0	64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
56	# endif	73	# endif
57	# endif	74	# endif
58		75
59	# ifndef EV_USE_SELECT	76	# ifndef EV_USE_SELECT
60	# if HAVE_SELECT && HAVE_SYS_SELECT_H	77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
…		…
102	# else	119	# else
103	# define EV_USE_INOTIFY 0	120	# define EV_USE_INOTIFY 0
104	# endif	121	# endif
105	# endif	122	# endif
106		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
107	#endif	132	#endif
108		133
109	#include <math.h>	134	#include <math.h>
110	#include <stdlib.h>	135	#include <stdlib.h>
111	#include <fcntl.h>	136	#include <fcntl.h>
…		…
136	# ifndef EV_SELECT_IS_WINSOCKET	161	# ifndef EV_SELECT_IS_WINSOCKET
137	# define EV_SELECT_IS_WINSOCKET 1	162	# define EV_SELECT_IS_WINSOCKET 1
138	# endif	163	# endif
139	#endif	164	#endif
140		165
141	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
142		167
143	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
144	# define EV_USE_MONOTONIC 0	169	# define EV_USE_MONOTONIC 0
145	#endif	170	#endif
146		171
147	#ifndef EV_USE_REALTIME	172	#ifndef EV_USE_REALTIME
148	# define EV_USE_REALTIME 0	173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
149	#endif	178	#endif
150		179
151	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
152	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
153	#endif	182	#endif
…		…
159	# define EV_USE_POLL 1	188	# define EV_USE_POLL 1
160	# endif	189	# endif
161	#endif	190	#endif
162		191
163	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
164	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
165	#endif	198	#endif
166		199
167	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
168	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
169	#endif	202	#endif
…		…
171	#ifndef EV_USE_PORT	204	#ifndef EV_USE_PORT
172	# define EV_USE_PORT 0	205	# define EV_USE_PORT 0
173	#endif	206	#endif
174		207
175	#ifndef EV_USE_INOTIFY	208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
176	# define EV_USE_INOTIFY 0	212	# define EV_USE_INOTIFY 0
		213	# endif
177	#endif	214	#endif
178		215
179	#ifndef EV_PID_HASHSIZE	216	#ifndef EV_PID_HASHSIZE
180	# if EV_MINIMAL	217	# if EV_MINIMAL
181	# define EV_PID_HASHSIZE 1	218	# define EV_PID_HASHSIZE 1
…		…
190	# else	227	# else
191	# define EV_INOTIFY_HASHSIZE 16	228	# define EV_INOTIFY_HASHSIZE 16
192	# endif	229	# endif
193	#endif	230	#endif
194		231
195	/**/	232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196		241
197	#ifndef CLOCK_MONOTONIC	242	#ifndef CLOCK_MONOTONIC
198	# undef EV_USE_MONOTONIC	243	# undef EV_USE_MONOTONIC
199	# define EV_USE_MONOTONIC 0	244	# define EV_USE_MONOTONIC 0
200	#endif	245	#endif
…		…
202	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
203	# undef EV_USE_REALTIME	248	# undef EV_USE_REALTIME
204	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
205	#endif	250	#endif
206		251
		252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
		260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
207	#if EV_SELECT_IS_WINSOCKET	267	#if EV_SELECT_IS_WINSOCKET
208	# include <winsock.h>	268	# include <winsock.h>
209	#endif	269	#endif
210		270
211	#if !EV_STAT_ENABLE	271	#if EV_USE_EVENTFD
212	# define EV_USE_INOTIFY 0	272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
213	#endif	276	# endif
214		277	int eventfd (unsigned int initval, int flags);
215	#if EV_USE_INOTIFY	278	# ifdef __cplusplus
216	# include <sys/inotify.h>	279	}
		280	# endif
217	#endif	281	#endif
218		282
219	/**/	283	/**/
		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
220		294
221	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds */	297	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
224		298
225	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
226	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
227	# define inline_size static inline /* inline for codesize */
228	# if EV_MINIMAL
229	# define noinline __attribute__ ((noinline))	301	# define noinline __attribute__ ((noinline))
230	# define inline_speed static noinline
231	# else
232	# define noinline
233	# define inline_speed static inline
234	# endif
235	#else	302	#else
236	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
237	# define inline_speed static
238	# define inline_size static
239	# define noinline	304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
240	#endif	308	#endif
241		309
242	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
243	#define expect_true(expr) expect ((expr) != 0, 1)	311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
244		319
245	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
246	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
247		322
248	#define EMPTY /* required for microsofts broken pseudo-c compiler */	323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
…		…
250		325
251	typedef ev_watcher *W;	326	typedef ev_watcher *W;
252	typedef ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
253	typedef ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
254		329
		330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
255	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
256		338
257	#ifdef _WIN32	339	#ifdef _WIN32
258	# include "ev_win32.c"	340	# include "ev_win32.c"
259	#endif	341	#endif
260		342
…		…
281	perror (msg);	363	perror (msg);
282	abort ();	364	abort ();
283	}	365	}
284	}	366	}
285		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
286	static void (alloc)(void *ptr, long size);	383	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
287		384
288	void	385	void
289	ev_set_allocator (void (cb)(void *ptr, long size))	386	ev_set_allocator (void (cb)(void *ptr, long size))
290	{	387	{
291	alloc = cb;	388	alloc = cb;
292	}	389	}
293		390
294	inline_speed void *	391	inline_speed void *
295	ev_realloc (void *ptr, long size)	392	ev_realloc (void *ptr, long size)
296	{	393	{
297	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	394	ptr = alloc (ptr, size);
298		395
299	if (!ptr && size)	396	if (!ptr && size)
300	{	397	{
301	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
302	abort ();	399	abort ();
…		…
396	{	493	{
397	return ev_rt_now;	494	return ev_rt_now;
398	}	495	}
399	#endif	496	#endif
400		497
		498	void
		499	ev_sleep (ev_tstamp delay)
		500	{
		501	if (delay > 0.)
		502	{
		503	#if EV_USE_NANOSLEEP
		504	struct timespec ts;
		505
		506	ts.tv_sec = (time_t)delay;
		507	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		508
		509	nanosleep (&ts, 0);
		510	#elif defined(_WIN32)
		511	Sleep ((unsigned long)(delay * 1e3));
		512	#else
		513	struct timeval tv;
		514
		515	tv.tv_sec = (time_t)delay;
		516	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		517
		518	select (0, 0, 0, 0, &tv);
		519	#endif
		520	}
		521	}
		522
		523	/*****************************************************************************/
		524
		525	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
		526
401	int inline_size	527	int inline_size
402	array_nextsize (int elem, int cur, int cnt)	528	array_nextsize (int elem, int cur, int cnt)
403	{	529	{
404	int ncur = cur + 1;	530	int ncur = cur + 1;
405		531
406	do	532	do
407	ncur <<= 1;	533	ncur <<= 1;
408	while (cnt > ncur);	534	while (cnt > ncur);
409		535
410	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */	536	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
411	if (elem * ncur > 4096)	537	if (elem * ncur > MALLOC_ROUND - sizeof (void ) 4)
412	{	538	{
413	ncur *= elem;	539	ncur *= elem;
414	ncur = (ncur + elem + 4095 + sizeof (void ) 4) & ~4095;	540	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void ) 4) & ~(MALLOC_ROUND - 1);
415	ncur = ncur - sizeof (void ) 4;	541	ncur = ncur - sizeof (void ) 4;
416	ncur /= elem;	542	ncur /= elem;
417	}	543	}
418		544
419	return ncur;	545	return ncur;
420	}	546	}
421		547
422	inline_speed void *	548	static noinline void *
423	array_realloc (int elem, void base, int cur, int cnt)	549	array_realloc (int elem, void base, int cur, int cnt)
424	{	550	{
425	cur = array_nextsize (elem, cur, cnt);	551	cur = array_nextsize (elem, cur, cnt);
426	return ev_realloc (base, elem * *cur);	552	return ev_realloc (base, elem * *cur);
427	}	553	}
…		…
452		578
453	void noinline	579	void noinline
454	ev_feed_event (EV_P_ void *w, int revents)	580	ev_feed_event (EV_P_ void *w, int revents)
455	{	581	{
456	W w_ = (W)w;	582	W w_ = (W)w;
		583	int pri = ABSPRI (w_);
457		584
458	if (expect_false (w_->pending))	585	if (expect_false (w_->pending))
		586	pendings [pri][w_->pending - 1].events \|= revents;
		587	else
459	{	588	{
		589	w_->pending = ++pendingcnt [pri];
		590	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		591	pendings [pri][w_->pending - 1].w = w_;
460	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;	592	pendings [pri][w_->pending - 1].events = revents;
461	return;
462	}	593	}
463
464	w_->pending = ++pendingcnt [ABSPRI (w_)];
465	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
466	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
467	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
468	}	594	}
469		595
470	void inline_size	596	void inline_speed
471	queue_events (EV_P_ W *events, int eventcnt, int type)	597	queue_events (EV_P_ W *events, int eventcnt, int type)
472	{	598	{
473	int i;	599	int i;
474		600
475	for (i = 0; i < eventcnt; ++i)	601	for (i = 0; i < eventcnt; ++i)
…		…
522	{	648	{
523	int fd = fdchanges [i];	649	int fd = fdchanges [i];
524	ANFD *anfd = anfds + fd;	650	ANFD *anfd = anfds + fd;
525	ev_io *w;	651	ev_io *w;
526		652
527	int events = 0;	653	unsigned char events = 0;
528		654
529	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	655	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
530	events \|= w->events;	656	events \|= (unsigned char)w->events;
531		657
532	#if EV_SELECT_IS_WINSOCKET	658	#if EV_SELECT_IS_WINSOCKET
533	if (events)	659	if (events)
534	{	660	{
535	unsigned long argp;	661	unsigned long argp;
		662	#ifdef EV_FD_TO_WIN32_HANDLE
		663	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		664	#else
536	anfd->handle = _get_osfhandle (fd);	665	anfd->handle = _get_osfhandle (fd);
		666	#endif
537	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	667	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
538	}	668	}
539	#endif	669	#endif
540		670
		671	{
		672	unsigned char o_events = anfd->events;
		673	unsigned char o_reify = anfd->reify;
		674
541	anfd->reify = 0;	675	anfd->reify = 0;
542
543	backend_modify (EV_A_ fd, anfd->events, events);
544	anfd->events = events;	676	anfd->events = events;
		677
		678	if (o_events != events \|\| o_reify & EV_IOFDSET)
		679	backend_modify (EV_A_ fd, o_events, events);
		680	}
545	}	681	}
546		682
547	fdchangecnt = 0;	683	fdchangecnt = 0;
548	}	684	}
549		685
550	void inline_size	686	void inline_size
551	fd_change (EV_P_ int fd)	687	fd_change (EV_P_ int fd, int flags)
552	{	688	{
553	if (expect_false (anfds [fd].reify))	689	unsigned char reify = anfds [fd].reify;
554	return;
555
556	anfds [fd].reify = 1;	690	anfds [fd].reify \|= flags;
557		691
		692	if (expect_true (!reify))
		693	{
558	++fdchangecnt;	694	++fdchangecnt;
559	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	695	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
560	fdchanges [fdchangecnt - 1] = fd;	696	fdchanges [fdchangecnt - 1] = fd;
		697	}
561	}	698	}
562		699
563	void inline_speed	700	void inline_speed
564	fd_kill (EV_P_ int fd)	701	fd_kill (EV_P_ int fd)
565	{	702	{
…		…
616		753
617	for (fd = 0; fd < anfdmax; ++fd)	754	for (fd = 0; fd < anfdmax; ++fd)
618	if (anfds [fd].events)	755	if (anfds [fd].events)
619	{	756	{
620	anfds [fd].events = 0;	757	anfds [fd].events = 0;
621	fd_change (EV_A_ fd);	758	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
622	}	759	}
623	}	760	}
624		761
625	/*****************************************************************************/	762	/*****************************************************************************/
626		763
		764	/*
		765	* at the moment we allow libev the luxury of two heaps,
		766	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		767	* which is more cache-efficient.
		768	* the difference is about 5% with 50000+ watchers.
		769	*/
		770	#define USE_4HEAP !EV_MINIMAL
		771	#if USE_4HEAP
		772
		773	#define HEAP0 3 /* index of first element in heap */
		774
		775	/* towards the root */
627	void inline_speed	776	void inline_speed
628	upheap (WT *heap, int k)	777	upheap (WT *heap, int k)
629	{	778	{
630	WT w = heap [k];	779	WT w = heap [k];
631		780
632	while (k && heap [k >> 1]->at > w->at)	781	for (;;)
633	{	782	{
		783	int p = ((k - HEAP0 - 1) / 4) + HEAP0;
		784
		785	if (p >= HEAP0 \|\| heap [p]->at <= w->at)
		786	break;
		787
634	heap [k] = heap [k >> 1];	788	heap [k] = heap [p];
635	((W)heap [k])->active = k + 1;	789	ev_active (heap [k]) = k;
636	k >>= 1;	790	k = p;
637	}	791	}
638		792
639	heap [k] = w;	793	heap [k] = w;
640	((W)heap [k])->active = k + 1;	794	ev_active (heap [k]) = k;
641
642	}	795	}
643		796
		797	/* away from the root */
644	void inline_speed	798	void inline_speed
645	downheap (WT *heap, int N, int k)	799	downheap (WT *heap, int N, int k)
646	{	800	{
647	WT w = heap [k];	801	WT w = heap [k];
		802	WT *E = heap + N + HEAP0;
648		803
649	while (k < (N >> 1))	804	for (;;)
650	{	805	{
651	int j = k << 1;	806	ev_tstamp minat;
		807	WT *minpos;
		808	WT pos = heap + 4 (k - HEAP0) + HEAP0;
652		809
653	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	810	// find minimum child
		811	if (expect_true (pos +3 < E))
654	++j;	812	{
		813	/* fast path */
		814	(minpos = pos + 0), (minat = (*minpos)->at);
		815	if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		816	if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		817	if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		818	}
		819	else
		820	{
		821	/* slow path */
		822	if (pos >= E)
		823	break;
		824	(minpos = pos + 0), (minat = (*minpos)->at);
		825	if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
		826	if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
		827	if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
		828	}
655		829
656	if (w->at <= heap [j]->at)	830	if (w->at <= minat)
657	break;	831	break;
658		832
659	heap [k] = heap [j];	833	ev_active (*minpos) = k;
660	((W)heap [k])->active = k + 1;	834	heap [k] = *minpos;
661	k = j;	835
		836	k = minpos - heap;
662	}	837	}
663		838
664	heap [k] = w;	839	heap [k] = w;
		840	ev_active (heap [k]) = k;
		841	}
		842
		843	#else // 4HEAP
		844
		845	#define HEAP0 1
		846
		847	/* towards the root */
		848	void inline_speed
		849	upheap (WT *heap, int k)
		850	{
		851	WT w = heap [k];
		852
		853	for (;;)
		854	{
		855	int p = k >> 1;
		856
		857	/* maybe we could use a dummy element at heap [0]? */
		858	if (!p \|\| heap [p]->at <= w->at)
		859	break;
		860
		861	heap [k] = heap [p];
		862	ev_active (heap [k]) = k;
		863	k = p;
		864	}
		865
		866	heap [k] = w;
		867	ev_active (heap [k]) = k;
		868	}
		869
		870	/* away from the root */
		871	void inline_speed
		872	downheap (WT *heap, int N, int k)
		873	{
		874	WT w = heap [k];
		875
		876	for (;;)
		877	{
		878	int c = k << 1;
		879
		880	if (c > N)
		881	break;
		882
		883	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		884	? 1 : 0;
		885
		886	if (w->at <= heap [c]->at)
		887	break;
		888
		889	heap [k] = heap [c];
665	((W)heap [k])->active = k + 1;	890	((W)heap [k])->active = k;
		891
		892	k = c;
		893	}
		894
		895	heap [k] = w;
		896	ev_active (heap [k]) = k;
666	}	897	}
		898	#endif
667		899
668	void inline_size	900	void inline_size
669	adjustheap (WT *heap, int N, int k)	901	adjustheap (WT *heap, int N, int k)
670	{	902	{
671	upheap (heap, k);	903	upheap (heap, k);
…		…
675	/*****************************************************************************/	907	/*****************************************************************************/
676		908
677	typedef struct	909	typedef struct
678	{	910	{
679	WL head;	911	WL head;
680	sig_atomic_t volatile gotsig;	912	EV_ATOMIC_T gotsig;
681	} ANSIG;	913	} ANSIG;
682		914
683	static ANSIG *signals;	915	static ANSIG *signals;
684	static int signalmax;	916	static int signalmax;
685		917
686	static int sigpipe [2];	918	static EV_ATOMIC_T gotsig;
687	static sig_atomic_t volatile gotsig;
688	static ev_io sigev;
689		919
690	void inline_size	920	void inline_size
691	signals_init (ANSIG *base, int count)	921	signals_init (ANSIG *base, int count)
692	{	922	{
693	while (count--)	923	while (count--)
…		…
697		927
698	++base;	928	++base;
699	}	929	}
700	}	930	}
701		931
702	static void	932	/*****************************************************************************/
703	sighandler (int signum)
704	{
705	#if _WIN32
706	signal (signum, sighandler);
707	#endif
708		933
709	signals [signum - 1].gotsig = 1;
710
711	if (!gotsig)
712	{
713	int old_errno = errno;
714	gotsig = 1;
715	write (sigpipe [1], &signum, 1);
716	errno = old_errno;
717	}
718	}
719
720	void noinline
721	ev_feed_signal_event (EV_P_ int signum)
722	{
723	WL w;
724
725	#if EV_MULTIPLICITY
726	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
727	#endif
728
729	--signum;
730
731	if (signum < 0 \|\| signum >= signalmax)
732	return;
733
734	signals [signum].gotsig = 0;
735
736	for (w = signals [signum].head; w; w = w->next)
737	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
738	}
739
740	static void
741	sigcb (EV_P_ ev_io *iow, int revents)
742	{
743	int signum;
744
745	read (sigpipe [0], &revents, 1);
746	gotsig = 0;
747
748	for (signum = signalmax; signum--; )
749	if (signals [signum].gotsig)
750	ev_feed_signal_event (EV_A_ signum + 1);
751	}
752
753	void inline_size	934	void inline_speed
754	fd_intern (int fd)	935	fd_intern (int fd)
755	{	936	{
756	#ifdef _WIN32	937	#ifdef _WIN32
757	int arg = 1;	938	int arg = 1;
758	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	939	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
761	fcntl (fd, F_SETFL, O_NONBLOCK);	942	fcntl (fd, F_SETFL, O_NONBLOCK);
762	#endif	943	#endif
763	}	944	}
764		945
765	static void noinline	946	static void noinline
766	siginit (EV_P)	947	evpipe_init (EV_P)
767	{	948	{
		949	if (!ev_is_active (&pipeev))
		950	{
		951	#if EV_USE_EVENTFD
		952	if ((evfd = eventfd (0, 0)) >= 0)
		953	{
		954	evpipe [0] = -1;
		955	fd_intern (evfd);
		956	ev_io_set (&pipeev, evfd, EV_READ);
		957	}
		958	else
		959	#endif
		960	{
		961	while (pipe (evpipe))
		962	syserr ("(libev) error creating signal/async pipe");
		963
768	fd_intern (sigpipe [0]);	964	fd_intern (evpipe [0]);
769	fd_intern (sigpipe [1]);	965	fd_intern (evpipe [1]);
		966	ev_io_set (&pipeev, evpipe [0], EV_READ);
		967	}
770		968
771	ev_io_set (&sigev, sigpipe [0], EV_READ);
772	ev_io_start (EV_A_ &sigev);	969	ev_io_start (EV_A_ &pipeev);
773	ev_unref (EV_A); /* child watcher should not keep loop alive */	970	ev_unref (EV_A); /* watcher should not keep loop alive */
		971	}
		972	}
		973
		974	void inline_size
		975	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		976	{
		977	if (!*flag)
		978	{
		979	int old_errno = errno; /* save errno because write might clobber it */
		980
		981	*flag = 1;
		982
		983	#if EV_USE_EVENTFD
		984	if (evfd >= 0)
		985	{
		986	uint64_t counter = 1;
		987	write (evfd, &counter, sizeof (uint64_t));
		988	}
		989	else
		990	#endif
		991	write (evpipe [1], &old_errno, 1);
		992
		993	errno = old_errno;
		994	}
		995	}
		996
		997	static void
		998	pipecb (EV_P_ ev_io *iow, int revents)
		999	{
		1000	#if EV_USE_EVENTFD
		1001	if (evfd >= 0)
		1002	{
		1003	uint64_t counter;
		1004	read (evfd, &counter, sizeof (uint64_t));
		1005	}
		1006	else
		1007	#endif
		1008	{
		1009	char dummy;
		1010	read (evpipe [0], &dummy, 1);
		1011	}
		1012
		1013	if (gotsig && ev_is_default_loop (EV_A))
		1014	{
		1015	int signum;
		1016	gotsig = 0;
		1017
		1018	for (signum = signalmax; signum--; )
		1019	if (signals [signum].gotsig)
		1020	ev_feed_signal_event (EV_A_ signum + 1);
		1021	}
		1022
		1023	#if EV_ASYNC_ENABLE
		1024	if (gotasync)
		1025	{
		1026	int i;
		1027	gotasync = 0;
		1028
		1029	for (i = asynccnt; i--; )
		1030	if (asyncs [i]->sent)
		1031	{
		1032	asyncs [i]->sent = 0;
		1033	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1034	}
		1035	}
		1036	#endif
774	}	1037	}
775		1038
776	/*****************************************************************************/	1039	/*****************************************************************************/
777		1040
		1041	static void
		1042	ev_sighandler (int signum)
		1043	{
		1044	#if EV_MULTIPLICITY
		1045	struct ev_loop *loop = &default_loop_struct;
		1046	#endif
		1047
		1048	#if _WIN32
		1049	signal (signum, ev_sighandler);
		1050	#endif
		1051
		1052	signals [signum - 1].gotsig = 1;
		1053	evpipe_write (EV_A_ &gotsig);
		1054	}
		1055
		1056	void noinline
		1057	ev_feed_signal_event (EV_P_ int signum)
		1058	{
		1059	WL w;
		1060
		1061	#if EV_MULTIPLICITY
		1062	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1063	#endif
		1064
		1065	--signum;
		1066
		1067	if (signum < 0 \|\| signum >= signalmax)
		1068	return;
		1069
		1070	signals [signum].gotsig = 0;
		1071
		1072	for (w = signals [signum].head; w; w = w->next)
		1073	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1074	}
		1075
		1076	/*****************************************************************************/
		1077
778	static ev_child *childs [EV_PID_HASHSIZE];	1078	static WL childs [EV_PID_HASHSIZE];
779		1079
780	#ifndef _WIN32	1080	#ifndef _WIN32
781		1081
782	static ev_signal childev;	1082	static ev_signal childev;
783		1083
		1084	#ifndef WIFCONTINUED
		1085	# define WIFCONTINUED(status) 0
		1086	#endif
		1087
784	void inline_speed	1088	void inline_speed
785	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1089	child_reap (EV_P_ int chain, int pid, int status)
786	{	1090	{
787	ev_child *w;	1091	ev_child *w;
		1092	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
788		1093
789	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1094	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		1095	{
790	if (w->pid == pid \|\| !w->pid)	1096	if ((w->pid == pid \|\| !w->pid)
		1097	&& (!traced \|\| (w->flags & 1)))
791	{	1098	{
792	ev_set_priority (w, ev_priority (sw)); /* need to do it now */	1099	ev_set_priority (w, EV_MAXPRI); /* need to do it now, this must be the same prio as the signal watcher itself */
793	w->rpid = pid;	1100	w->rpid = pid;
794	w->rstatus = status;	1101	w->rstatus = status;
795	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1102	ev_feed_event (EV_A_ (W)w, EV_CHILD);
796	}	1103	}
		1104	}
797	}	1105	}
798		1106
799	#ifndef WCONTINUED	1107	#ifndef WCONTINUED
800	# define WCONTINUED 0	1108	# define WCONTINUED 0
801	#endif	1109	#endif
…		…
810	if (!WCONTINUED	1118	if (!WCONTINUED
811	\|\| errno != EINVAL	1119	\|\| errno != EINVAL
812	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))	1120	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
813	return;	1121	return;
814		1122
815	/* make sure we are called again until all childs have been reaped */	1123	/* make sure we are called again until all children have been reaped */
816	/* we need to do it this way so that the callback gets called before we continue */	1124	/* we need to do it this way so that the callback gets called before we continue */
817	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1125	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
818		1126
819	child_reap (EV_A_ sw, pid, pid, status);	1127	child_reap (EV_A_ pid, pid, status);
820	if (EV_PID_HASHSIZE > 1)	1128	if (EV_PID_HASHSIZE > 1)
821	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1129	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
822	}	1130	}
823		1131
824	#endif	1132	#endif
825		1133
826	/*****************************************************************************/	1134	/*****************************************************************************/
…		…
898	}	1206	}
899		1207
900	unsigned int	1208	unsigned int
901	ev_embeddable_backends (void)	1209	ev_embeddable_backends (void)
902	{	1210	{
903	return EVBACKEND_EPOLL	1211	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
904	\| EVBACKEND_KQUEUE	1212
905	\| EVBACKEND_PORT;	1213	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1214	/* please fix it and tell me how to detect the fix */
		1215	flags &= ~EVBACKEND_EPOLL;
		1216
		1217	return flags;
906	}	1218	}
907		1219
908	unsigned int	1220	unsigned int
909	ev_backend (EV_P)	1221	ev_backend (EV_P)
910	{	1222	{
…		…
913		1225
914	unsigned int	1226	unsigned int
915	ev_loop_count (EV_P)	1227	ev_loop_count (EV_P)
916	{	1228	{
917	return loop_count;	1229	return loop_count;
		1230	}
		1231
		1232	void
		1233	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1234	{
		1235	io_blocktime = interval;
		1236	}
		1237
		1238	void
		1239	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1240	{
		1241	timeout_blocktime = interval;
918	}	1242	}
919		1243
920	static void noinline	1244	static void noinline
921	loop_init (EV_P_ unsigned int flags)	1245	loop_init (EV_P_ unsigned int flags)
922	{	1246	{
…		…
928	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1252	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
929	have_monotonic = 1;	1253	have_monotonic = 1;
930	}	1254	}
931	#endif	1255	#endif
932		1256
933	ev_rt_now = ev_time ();	1257	ev_rt_now = ev_time ();
934	mn_now = get_clock ();	1258	mn_now = get_clock ();
935	now_floor = mn_now;	1259	now_floor = mn_now;
936	rtmn_diff = ev_rt_now - mn_now;	1260	rtmn_diff = ev_rt_now - mn_now;
		1261
		1262	io_blocktime = 0.;
		1263	timeout_blocktime = 0.;
		1264	backend = 0;
		1265	backend_fd = -1;
		1266	gotasync = 0;
		1267	#if EV_USE_INOTIFY
		1268	fs_fd = -2;
		1269	#endif
937		1270
938	/* pid check not overridable via env */	1271	/* pid check not overridable via env */
939	#ifndef _WIN32	1272	#ifndef _WIN32
940	if (flags & EVFLAG_FORKCHECK)	1273	if (flags & EVFLAG_FORKCHECK)
941	curpid = getpid ();	1274	curpid = getpid ();
…		…
944	if (!(flags & EVFLAG_NOENV)	1277	if (!(flags & EVFLAG_NOENV)
945	&& !enable_secure ()	1278	&& !enable_secure ()
946	&& getenv ("LIBEV_FLAGS"))	1279	&& getenv ("LIBEV_FLAGS"))
947	flags = atoi (getenv ("LIBEV_FLAGS"));	1280	flags = atoi (getenv ("LIBEV_FLAGS"));
948		1281
949	if (!(flags & 0x0000ffffUL))	1282	if (!(flags & 0x0000ffffU))
950	flags \|= ev_recommended_backends ();	1283	flags \|= ev_recommended_backends ();
951
952	backend = 0;
953	backend_fd = -1;
954	#if EV_USE_INOTIFY
955	fs_fd = -2;
956	#endif
957		1284
958	#if EV_USE_PORT	1285	#if EV_USE_PORT
959	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1286	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
960	#endif	1287	#endif
961	#if EV_USE_KQUEUE	1288	#if EV_USE_KQUEUE
…		…
969	#endif	1296	#endif
970	#if EV_USE_SELECT	1297	#if EV_USE_SELECT
971	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1298	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
972	#endif	1299	#endif
973		1300
974	ev_init (&sigev, sigcb);	1301	ev_init (&pipeev, pipecb);
975	ev_set_priority (&sigev, EV_MAXPRI);	1302	ev_set_priority (&pipeev, EV_MAXPRI);
976	}	1303	}
977	}	1304	}
978		1305
979	static void noinline	1306	static void noinline
980	loop_destroy (EV_P)	1307	loop_destroy (EV_P)
981	{	1308	{
982	int i;	1309	int i;
		1310
		1311	if (ev_is_active (&pipeev))
		1312	{
		1313	ev_ref (EV_A); /* signal watcher */
		1314	ev_io_stop (EV_A_ &pipeev);
		1315
		1316	#if EV_USE_EVENTFD
		1317	if (evfd >= 0)
		1318	close (evfd);
		1319	#endif
		1320
		1321	if (evpipe [0] >= 0)
		1322	{
		1323	close (evpipe [0]);
		1324	close (evpipe [1]);
		1325	}
		1326	}
983		1327
984	#if EV_USE_INOTIFY	1328	#if EV_USE_INOTIFY
985	if (fs_fd >= 0)	1329	if (fs_fd >= 0)
986	close (fs_fd);	1330	close (fs_fd);
987	#endif	1331	#endif
…		…
1010	array_free (pending, [i]);	1354	array_free (pending, [i]);
1011	#if EV_IDLE_ENABLE	1355	#if EV_IDLE_ENABLE
1012	array_free (idle, [i]);	1356	array_free (idle, [i]);
1013	#endif	1357	#endif
1014	}	1358	}
		1359
		1360	ev_free (anfds); anfdmax = 0;
1015		1361
1016	/* have to use the microsoft-never-gets-it-right macro */	1362	/* have to use the microsoft-never-gets-it-right macro */
1017	array_free (fdchange, EMPTY);	1363	array_free (fdchange, EMPTY);
1018	array_free (timer, EMPTY);	1364	array_free (timer, EMPTY);
1019	#if EV_PERIODIC_ENABLE	1365	#if EV_PERIODIC_ENABLE
1020	array_free (periodic, EMPTY);	1366	array_free (periodic, EMPTY);
1021	#endif	1367	#endif
		1368	#if EV_FORK_ENABLE
		1369	array_free (fork, EMPTY);
		1370	#endif
1022	array_free (prepare, EMPTY);	1371	array_free (prepare, EMPTY);
1023	array_free (check, EMPTY);	1372	array_free (check, EMPTY);
		1373	#if EV_ASYNC_ENABLE
		1374	array_free (async, EMPTY);
		1375	#endif
1024		1376
1025	backend = 0;	1377	backend = 0;
1026	}	1378	}
1027		1379
		1380	#if EV_USE_INOTIFY
1028	void inline_size infy_fork (EV_P);	1381	void inline_size infy_fork (EV_P);
		1382	#endif
1029		1383
1030	void inline_size	1384	void inline_size
1031	loop_fork (EV_P)	1385	loop_fork (EV_P)
1032	{	1386	{
1033	#if EV_USE_PORT	1387	#if EV_USE_PORT
…		…
1041	#endif	1395	#endif
1042	#if EV_USE_INOTIFY	1396	#if EV_USE_INOTIFY
1043	infy_fork (EV_A);	1397	infy_fork (EV_A);
1044	#endif	1398	#endif
1045		1399
1046	if (ev_is_active (&sigev))	1400	if (ev_is_active (&pipeev))
1047	{	1401	{
1048	/* default loop */	1402	/* this "locks" the handlers against writing to the pipe */
		1403	/* while we modify the fd vars */
		1404	gotsig = 1;
		1405	#if EV_ASYNC_ENABLE
		1406	gotasync = 1;
		1407	#endif
1049		1408
1050	ev_ref (EV_A);	1409	ev_ref (EV_A);
1051	ev_io_stop (EV_A_ &sigev);	1410	ev_io_stop (EV_A_ &pipeev);
		1411
		1412	#if EV_USE_EVENTFD
		1413	if (evfd >= 0)
		1414	close (evfd);
		1415	#endif
		1416
		1417	if (evpipe [0] >= 0)
		1418	{
1052	close (sigpipe [0]);	1419	close (evpipe [0]);
1053	close (sigpipe [1]);	1420	close (evpipe [1]);
		1421	}
1054		1422
1055	while (pipe (sigpipe))
1056	syserr ("(libev) error creating pipe");
1057
1058	siginit (EV_A);	1423	evpipe_init (EV_A);
		1424	/* now iterate over everything, in case we missed something */
		1425	pipecb (EV_A_ &pipeev, EV_READ);
1059	}	1426	}
1060		1427
1061	postfork = 0;	1428	postfork = 0;
1062	}	1429	}
1063		1430
…		…
1085	}	1452	}
1086		1453
1087	void	1454	void
1088	ev_loop_fork (EV_P)	1455	ev_loop_fork (EV_P)
1089	{	1456	{
1090	postfork = 1;	1457	postfork = 1; /* must be in line with ev_default_fork */
1091	}	1458	}
1092
1093	#endif	1459	#endif
1094		1460
1095	#if EV_MULTIPLICITY	1461	#if EV_MULTIPLICITY
1096	struct ev_loop *	1462	struct ev_loop *
1097	ev_default_loop_init (unsigned int flags)	1463	ev_default_loop_init (unsigned int flags)
1098	#else	1464	#else
1099	int	1465	int
1100	ev_default_loop (unsigned int flags)	1466	ev_default_loop (unsigned int flags)
1101	#endif	1467	#endif
1102	{	1468	{
1103	if (sigpipe [0] == sigpipe [1])
1104	if (pipe (sigpipe))
1105	return 0;
1106
1107	if (!ev_default_loop_ptr)	1469	if (!ev_default_loop_ptr)
1108	{	1470	{
1109	#if EV_MULTIPLICITY	1471	#if EV_MULTIPLICITY
1110	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1472	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1111	#else	1473	#else
…		…
1114		1476
1115	loop_init (EV_A_ flags);	1477	loop_init (EV_A_ flags);
1116		1478
1117	if (ev_backend (EV_A))	1479	if (ev_backend (EV_A))
1118	{	1480	{
1119	siginit (EV_A);
1120
1121	#ifndef _WIN32	1481	#ifndef _WIN32
1122	ev_signal_init (&childev, childcb, SIGCHLD);	1482	ev_signal_init (&childev, childcb, SIGCHLD);
1123	ev_set_priority (&childev, EV_MAXPRI);	1483	ev_set_priority (&childev, EV_MAXPRI);
1124	ev_signal_start (EV_A_ &childev);	1484	ev_signal_start (EV_A_ &childev);
1125	ev_unref (EV_A); /* child watcher should not keep loop alive */	1485	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1142	#ifndef _WIN32	1502	#ifndef _WIN32
1143	ev_ref (EV_A); /* child watcher */	1503	ev_ref (EV_A); /* child watcher */
1144	ev_signal_stop (EV_A_ &childev);	1504	ev_signal_stop (EV_A_ &childev);
1145	#endif	1505	#endif
1146		1506
1147	ev_ref (EV_A); /* signal watcher */
1148	ev_io_stop (EV_A_ &sigev);
1149
1150	close (sigpipe [0]); sigpipe [0] = 0;
1151	close (sigpipe [1]); sigpipe [1] = 0;
1152
1153	loop_destroy (EV_A);	1507	loop_destroy (EV_A);
1154	}	1508	}
1155		1509
1156	void	1510	void
1157	ev_default_fork (void)	1511	ev_default_fork (void)
…		…
1159	#if EV_MULTIPLICITY	1513	#if EV_MULTIPLICITY
1160	struct ev_loop *loop = ev_default_loop_ptr;	1514	struct ev_loop *loop = ev_default_loop_ptr;
1161	#endif	1515	#endif
1162		1516
1163	if (backend)	1517	if (backend)
1164	postfork = 1;	1518	postfork = 1; /* must be in line with ev_loop_fork */
1165	}	1519	}
1166		1520
1167	/*****************************************************************************/	1521	/*****************************************************************************/
1168		1522
1169	void	1523	void
…		…
1189	p->w->pending = 0;	1543	p->w->pending = 0;
1190	EV_CB_INVOKE (p->w, p->events);	1544	EV_CB_INVOKE (p->w, p->events);
1191	}	1545	}
1192	}	1546	}
1193	}	1547	}
1194
1195	void inline_size
1196	timers_reify (EV_P)
1197	{
1198	while (timercnt && ((WT)timers [0])->at <= mn_now)
1199	{
1200	ev_timer *w = timers [0];
1201
1202	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
1203
1204	/* first reschedule or stop timer */
1205	if (w->repeat)
1206	{
1207	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1208
1209	((WT)w)->at += w->repeat;
1210	if (((WT)w)->at < mn_now)
1211	((WT)w)->at = mn_now;
1212
1213	downheap ((WT *)timers, timercnt, 0);
1214	}
1215	else
1216	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1217
1218	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1219	}
1220	}
1221
1222	#if EV_PERIODIC_ENABLE
1223	void inline_size
1224	periodics_reify (EV_P)
1225	{
1226	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1227	{
1228	ev_periodic *w = periodics [0];
1229
1230	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
1231
1232	/* first reschedule or stop timer */
1233	if (w->reschedule_cb)
1234	{
1235	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1236	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1237	downheap ((WT *)periodics, periodiccnt, 0);
1238	}
1239	else if (w->interval)
1240	{
1241	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1242	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1243	downheap ((WT *)periodics, periodiccnt, 0);
1244	}
1245	else
1246	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1247
1248	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1249	}
1250	}
1251
1252	static void noinline
1253	periodics_reschedule (EV_P)
1254	{
1255	int i;
1256
1257	/* adjust periodics after time jump */
1258	for (i = 0; i < periodiccnt; ++i)
1259	{
1260	ev_periodic *w = periodics [i];
1261
1262	if (w->reschedule_cb)
1263	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1264	else if (w->interval)
1265	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1266	}
1267
1268	/* now rebuild the heap */
1269	for (i = periodiccnt >> 1; i--; )
1270	downheap ((WT *)periodics, periodiccnt, i);
1271	}
1272	#endif
1273		1548
1274	#if EV_IDLE_ENABLE	1549	#if EV_IDLE_ENABLE
1275	void inline_size	1550	void inline_size
1276	idle_reify (EV_P)	1551	idle_reify (EV_P)
1277	{	1552	{
…		…
1292	}	1567	}
1293	}	1568	}
1294	}	1569	}
1295	#endif	1570	#endif
1296		1571
1297	int inline_size	1572	void inline_size
1298	time_update_monotonic (EV_P)	1573	timers_reify (EV_P)
1299	{	1574	{
		1575	while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
		1576	{
		1577	ev_timer w = (ev_timer )timers [HEAP0];
		1578
		1579	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
		1580
		1581	/* first reschedule or stop timer */
		1582	if (w->repeat)
		1583	{
		1584	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1585
		1586	ev_at (w) += w->repeat;
		1587	if (ev_at (w) < mn_now)
		1588	ev_at (w) = mn_now;
		1589
		1590	downheap (timers, timercnt, HEAP0);
		1591	}
		1592	else
		1593	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1594
		1595	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1596	}
		1597	}
		1598
		1599	#if EV_PERIODIC_ENABLE
		1600	void inline_size
		1601	periodics_reify (EV_P)
		1602	{
		1603	while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
		1604	{
		1605	ev_periodic w = (ev_periodic )periodics [HEAP0];
		1606
		1607	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
		1608
		1609	/* first reschedule or stop timer */
		1610	if (w->reschedule_cb)
		1611	{
		1612	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1613	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1614	downheap (periodics, periodiccnt, 1);
		1615	}
		1616	else if (w->interval)
		1617	{
		1618	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1619	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1620	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
		1621	downheap (periodics, periodiccnt, HEAP0);
		1622	}
		1623	else
		1624	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1625
		1626	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1627	}
		1628	}
		1629
		1630	static void noinline
		1631	periodics_reschedule (EV_P)
		1632	{
		1633	int i;
		1634
		1635	/* adjust periodics after time jump */
		1636	for (i = 1; i <= periodiccnt; ++i)
		1637	{
		1638	ev_periodic w = (ev_periodic )periodics [i];
		1639
		1640	if (w->reschedule_cb)
		1641	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1642	else if (w->interval)
		1643	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1644	}
		1645
		1646	/* now rebuild the heap */
		1647	for (i = periodiccnt >> 1; --i; )
		1648	downheap (periodics, periodiccnt, i + HEAP0);
		1649	}
		1650	#endif
		1651
		1652	void inline_speed
		1653	time_update (EV_P_ ev_tstamp max_block)
		1654	{
		1655	int i;
		1656
		1657	#if EV_USE_MONOTONIC
		1658	if (expect_true (have_monotonic))
		1659	{
		1660	ev_tstamp odiff = rtmn_diff;
		1661
1300	mn_now = get_clock ();	1662	mn_now = get_clock ();
1301		1663
		1664	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		1665	/* interpolate in the meantime */
1302	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1666	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1303	{	1667	{
1304	ev_rt_now = rtmn_diff + mn_now;	1668	ev_rt_now = rtmn_diff + mn_now;
1305	return 0;	1669	return;
1306	}	1670	}
1307	else	1671
1308	{
1309	now_floor = mn_now;	1672	now_floor = mn_now;
1310	ev_rt_now = ev_time ();	1673	ev_rt_now = ev_time ();
1311	return 1;
1312	}
1313	}
1314		1674
1315	void inline_size	1675	/* loop a few times, before making important decisions.
1316	time_update (EV_P)	1676	* on the choice of "4": one iteration isn't enough,
1317	{	1677	* in case we get preempted during the calls to
1318	int i;	1678	* ev_time and get_clock. a second call is almost guaranteed
1319		1679	* to succeed in that case, though. and looping a few more times
1320	#if EV_USE_MONOTONIC	1680	* doesn't hurt either as we only do this on time-jumps or
1321	if (expect_true (have_monotonic))	1681	* in the unlikely event of having been preempted here.
1322	{	1682	*/
1323	if (time_update_monotonic (EV_A))	1683	for (i = 4; --i; )
1324	{	1684	{
1325	ev_tstamp odiff = rtmn_diff;
1326
1327	/* loop a few times, before making important decisions.
1328	* on the choice of "4": one iteration isn't enough,
1329	* in case we get preempted during the calls to
1330	* ev_time and get_clock. a second call is almost guaranteed
1331	* to succeed in that case, though. and looping a few more times
1332	* doesn't hurt either as we only do this on time-jumps or
1333	* in the unlikely event of having been preempted here.
1334	*/
1335	for (i = 4; --i; )
1336	{
1337	rtmn_diff = ev_rt_now - mn_now;	1685	rtmn_diff = ev_rt_now - mn_now;
1338		1686
1339	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1687	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1340	return; /* all is well */	1688	return; /* all is well */
1341		1689
1342	ev_rt_now = ev_time ();	1690	ev_rt_now = ev_time ();
1343	mn_now = get_clock ();	1691	mn_now = get_clock ();
1344	now_floor = mn_now;	1692	now_floor = mn_now;
1345	}	1693	}
1346		1694
1347	# if EV_PERIODIC_ENABLE	1695	# if EV_PERIODIC_ENABLE
1348	periodics_reschedule (EV_A);	1696	periodics_reschedule (EV_A);
1349	# endif	1697	# endif
1350	/* no timer adjustment, as the monotonic clock doesn't jump */	1698	/* no timer adjustment, as the monotonic clock doesn't jump */
1351	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1699	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1352	}
1353	}	1700	}
1354	else	1701	else
1355	#endif	1702	#endif
1356	{	1703	{
1357	ev_rt_now = ev_time ();	1704	ev_rt_now = ev_time ();
1358		1705
1359	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1706	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1360	{	1707	{
1361	#if EV_PERIODIC_ENABLE	1708	#if EV_PERIODIC_ENABLE
1362	periodics_reschedule (EV_A);	1709	periodics_reschedule (EV_A);
1363	#endif	1710	#endif
1364
1365	/* adjust timers. this is easy, as the offset is the same for all of them */	1711	/* adjust timers. this is easy, as the offset is the same for all of them */
1366	for (i = 0; i < timercnt; ++i)	1712	for (i = 1; i <= timercnt; ++i)
1367	((WT)timers [i])->at += ev_rt_now - mn_now;	1713	ev_at (timers [i]) += ev_rt_now - mn_now;
1368	}	1714	}
1369		1715
1370	mn_now = ev_rt_now;	1716	mn_now = ev_rt_now;
1371	}	1717	}
1372	}	1718	}
…		…
1386	static int loop_done;	1732	static int loop_done;
1387		1733
1388	void	1734	void
1389	ev_loop (EV_P_ int flags)	1735	ev_loop (EV_P_ int flags)
1390	{	1736	{
1391	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)	1737	loop_done = EVUNLOOP_CANCEL;
1392	? EVUNLOOP_ONE
1393	: EVUNLOOP_CANCEL;
1394		1738
1395	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1739	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1396		1740
1397	do	1741	do
1398	{	1742	{
…		…
1413	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	1757	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1414	call_pending (EV_A);	1758	call_pending (EV_A);
1415	}	1759	}
1416	#endif	1760	#endif
1417		1761
1418	/* queue check watchers (and execute them) */	1762	/* queue prepare watchers (and execute them) */
1419	if (expect_false (preparecnt))	1763	if (expect_false (preparecnt))
1420	{	1764	{
1421	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1765	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1422	call_pending (EV_A);	1766	call_pending (EV_A);
1423	}	1767	}
…		…
1432	/* update fd-related kernel structures */	1776	/* update fd-related kernel structures */
1433	fd_reify (EV_A);	1777	fd_reify (EV_A);
1434		1778
1435	/* calculate blocking time */	1779	/* calculate blocking time */
1436	{	1780	{
1437	ev_tstamp block;	1781	ev_tstamp waittime = 0.;
		1782	ev_tstamp sleeptime = 0.;
1438		1783
1439	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))	1784	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1440	block = 0.; /* do not block at all */
1441	else
1442	{	1785	{
1443	/* update time to cancel out callback processing overhead */	1786	/* update time to cancel out callback processing overhead */
1444	#if EV_USE_MONOTONIC
1445	if (expect_true (have_monotonic))
1446	time_update_monotonic (EV_A);	1787	time_update (EV_A_ 1e100);
1447	else
1448	#endif
1449	{
1450	ev_rt_now = ev_time ();
1451	mn_now = ev_rt_now;
1452	}
1453		1788
1454	block = MAX_BLOCKTIME;	1789	waittime = MAX_BLOCKTIME;
1455		1790
1456	if (timercnt)	1791	if (timercnt)
1457	{	1792	{
1458	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1793	ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
1459	if (block > to) block = to;	1794	if (waittime > to) waittime = to;
1460	}	1795	}
1461		1796
1462	#if EV_PERIODIC_ENABLE	1797	#if EV_PERIODIC_ENABLE
1463	if (periodiccnt)	1798	if (periodiccnt)
1464	{	1799	{
1465	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1800	ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1466	if (block > to) block = to;	1801	if (waittime > to) waittime = to;
1467	}	1802	}
1468	#endif	1803	#endif
1469		1804
1470	if (expect_false (block < 0.)) block = 0.;	1805	if (expect_false (waittime < timeout_blocktime))
		1806	waittime = timeout_blocktime;
		1807
		1808	sleeptime = waittime - backend_fudge;
		1809
		1810	if (expect_true (sleeptime > io_blocktime))
		1811	sleeptime = io_blocktime;
		1812
		1813	if (sleeptime)
		1814	{
		1815	ev_sleep (sleeptime);
		1816	waittime -= sleeptime;
		1817	}
1471	}	1818	}
1472		1819
1473	++loop_count;	1820	++loop_count;
1474	backend_poll (EV_A_ block);	1821	backend_poll (EV_A_ waittime);
		1822
		1823	/* update ev_rt_now, do magic */
		1824	time_update (EV_A_ waittime + sleeptime);
1475	}	1825	}
1476
1477	/* update ev_rt_now, do magic */
1478	time_update (EV_A);
1479		1826
1480	/* queue pending timers and reschedule them */	1827	/* queue pending timers and reschedule them */
1481	timers_reify (EV_A); /* relative timers called last */	1828	timers_reify (EV_A); /* relative timers called last */
1482	#if EV_PERIODIC_ENABLE	1829	#if EV_PERIODIC_ENABLE
1483	periodics_reify (EV_A); /* absolute timers called first */	1830	periodics_reify (EV_A); /* absolute timers called first */
…		…
1491	/* queue check watchers, to be executed first */	1838	/* queue check watchers, to be executed first */
1492	if (expect_false (checkcnt))	1839	if (expect_false (checkcnt))
1493	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1840	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1494		1841
1495	call_pending (EV_A);	1842	call_pending (EV_A);
1496
1497	}	1843	}
1498	while (expect_true (activecnt && !loop_done));	1844	while (expect_true (
		1845	activecnt
		1846	&& !loop_done
		1847	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
		1848	));
1499		1849
1500	if (loop_done == EVUNLOOP_ONE)	1850	if (loop_done == EVUNLOOP_ONE)
1501	loop_done = EVUNLOOP_CANCEL;	1851	loop_done = EVUNLOOP_CANCEL;
1502	}	1852	}
1503		1853
…		…
1545	ev_clear_pending (EV_P_ void *w)	1895	ev_clear_pending (EV_P_ void *w)
1546	{	1896	{
1547	W w_ = (W)w;	1897	W w_ = (W)w;
1548	int pending = w_->pending;	1898	int pending = w_->pending;
1549		1899
1550	if (!pending)	1900	if (expect_true (pending))
		1901	{
		1902	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1903	w_->pending = 0;
		1904	p->w = 0;
		1905	return p->events;
		1906	}
		1907	else
1551	return 0;	1908	return 0;
1552
1553	w_->pending = 0;
1554	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1555	p->w = 0;
1556
1557	return p->events;
1558	}	1909	}
1559		1910
1560	void inline_size	1911	void inline_size
1561	pri_adjust (EV_P_ W w)	1912	pri_adjust (EV_P_ W w)
1562	{	1913	{
…		…
1581	w->active = 0;	1932	w->active = 0;
1582	}	1933	}
1583		1934
1584	/*****************************************************************************/	1935	/*****************************************************************************/
1585		1936
1586	void	1937	void noinline
1587	ev_io_start (EV_P_ ev_io *w)	1938	ev_io_start (EV_P_ ev_io *w)
1588	{	1939	{
1589	int fd = w->fd;	1940	int fd = w->fd;
1590		1941
1591	if (expect_false (ev_is_active (w)))	1942	if (expect_false (ev_is_active (w)))
…		…
1593		1944
1594	assert (("ev_io_start called with negative fd", fd >= 0));	1945	assert (("ev_io_start called with negative fd", fd >= 0));
1595		1946
1596	ev_start (EV_A_ (W)w, 1);	1947	ev_start (EV_A_ (W)w, 1);
1597	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1948	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1598	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1949	wlist_add (&anfds[fd].head, (WL)w);
1599		1950
1600	fd_change (EV_A_ fd);	1951	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
		1952	w->events &= ~EV_IOFDSET;
1601	}	1953	}
1602		1954
1603	void	1955	void noinline
1604	ev_io_stop (EV_P_ ev_io *w)	1956	ev_io_stop (EV_P_ ev_io *w)
1605	{	1957	{
1606	clear_pending (EV_A_ (W)w);	1958	clear_pending (EV_A_ (W)w);
1607	if (expect_false (!ev_is_active (w)))	1959	if (expect_false (!ev_is_active (w)))
1608	return;	1960	return;
1609		1961
1610	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1962	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1611		1963
1612	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1964	wlist_del (&anfds[w->fd].head, (WL)w);
1613	ev_stop (EV_A_ (W)w);	1965	ev_stop (EV_A_ (W)w);
1614		1966
1615	fd_change (EV_A_ w->fd);	1967	fd_change (EV_A_ w->fd, 1);
1616	}	1968	}
1617		1969
1618	void	1970	void noinline
1619	ev_timer_start (EV_P_ ev_timer *w)	1971	ev_timer_start (EV_P_ ev_timer *w)
1620	{	1972	{
1621	if (expect_false (ev_is_active (w)))	1973	if (expect_false (ev_is_active (w)))
1622	return;	1974	return;
1623		1975
1624	((WT)w)->at += mn_now;	1976	ev_at (w) += mn_now;
1625		1977
1626	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1978	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1627		1979
1628	ev_start (EV_A_ (W)w, ++timercnt);	1980	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1629	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	1981	array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
1630	timers [timercnt - 1] = w;	1982	timers [ev_active (w)] = (WT)w;
1631	upheap ((WT *)timers, timercnt - 1);	1983	upheap (timers, ev_active (w));
1632		1984
1633	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/	1985	/assert (("internal timer heap corruption", timers [ev_active (w)] == w));/
1634	}	1986	}
1635		1987
1636	void	1988	void noinline
1637	ev_timer_stop (EV_P_ ev_timer *w)	1989	ev_timer_stop (EV_P_ ev_timer *w)
1638	{	1990	{
1639	clear_pending (EV_A_ (W)w);	1991	clear_pending (EV_A_ (W)w);
1640	if (expect_false (!ev_is_active (w)))	1992	if (expect_false (!ev_is_active (w)))
1641	return;	1993	return;
1642		1994
1643	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1644
1645	{	1995	{
1646	int active = ((W)w)->active;	1996	int active = ev_active (w);
1647		1997
		1998	assert (("internal timer heap corruption", timers [active] == (WT)w));
		1999
1648	if (expect_true (--active < --timercnt))	2000	if (expect_true (active < timercnt + HEAP0 - 1))
1649	{	2001	{
1650	timers [active] = timers [timercnt];	2002	timers [active] = timers [timercnt + HEAP0 - 1];
1651	adjustheap ((WT *)timers, timercnt, active);	2003	adjustheap (timers, timercnt, active);
1652	}	2004	}
		2005
		2006	--timercnt;
1653	}	2007	}
1654		2008
1655	((WT)w)->at -= mn_now;	2009	ev_at (w) -= mn_now;
1656		2010
1657	ev_stop (EV_A_ (W)w);	2011	ev_stop (EV_A_ (W)w);
1658	}	2012	}
1659		2013
1660	void	2014	void noinline
1661	ev_timer_again (EV_P_ ev_timer *w)	2015	ev_timer_again (EV_P_ ev_timer *w)
1662	{	2016	{
1663	if (ev_is_active (w))	2017	if (ev_is_active (w))
1664	{	2018	{
1665	if (w->repeat)	2019	if (w->repeat)
1666	{	2020	{
1667	((WT)w)->at = mn_now + w->repeat;	2021	ev_at (w) = mn_now + w->repeat;
1668	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2022	adjustheap (timers, timercnt, ev_active (w));
1669	}	2023	}
1670	else	2024	else
1671	ev_timer_stop (EV_A_ w);	2025	ev_timer_stop (EV_A_ w);
1672	}	2026	}
1673	else if (w->repeat)	2027	else if (w->repeat)
1674	{	2028	{
1675	w->at = w->repeat;	2029	ev_at (w) = w->repeat;
1676	ev_timer_start (EV_A_ w);	2030	ev_timer_start (EV_A_ w);
1677	}	2031	}
1678	}	2032	}
1679		2033
1680	#if EV_PERIODIC_ENABLE	2034	#if EV_PERIODIC_ENABLE
1681	void	2035	void noinline
1682	ev_periodic_start (EV_P_ ev_periodic *w)	2036	ev_periodic_start (EV_P_ ev_periodic *w)
1683	{	2037	{
1684	if (expect_false (ev_is_active (w)))	2038	if (expect_false (ev_is_active (w)))
1685	return;	2039	return;
1686		2040
1687	if (w->reschedule_cb)	2041	if (w->reschedule_cb)
1688	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2042	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1689	else if (w->interval)	2043	else if (w->interval)
1690	{	2044	{
1691	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2045	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1692	/* this formula differs from the one in periodic_reify because we do not always round up */	2046	/* this formula differs from the one in periodic_reify because we do not always round up */
1693	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2047	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1694	}	2048	}
		2049	else
		2050	ev_at (w) = w->offset;
1695		2051
1696	ev_start (EV_A_ (W)w, ++periodiccnt);	2052	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1697	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2053	array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
1698	periodics [periodiccnt - 1] = w;	2054	periodics [ev_active (w)] = (WT)w;
1699	upheap ((WT *)periodics, periodiccnt - 1);	2055	upheap (periodics, ev_active (w));
1700		2056
1701	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/	2057	/assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));/
1702	}	2058	}
1703		2059
1704	void	2060	void noinline
1705	ev_periodic_stop (EV_P_ ev_periodic *w)	2061	ev_periodic_stop (EV_P_ ev_periodic *w)
1706	{	2062	{
1707	clear_pending (EV_A_ (W)w);	2063	clear_pending (EV_A_ (W)w);
1708	if (expect_false (!ev_is_active (w)))	2064	if (expect_false (!ev_is_active (w)))
1709	return;	2065	return;
1710		2066
1711	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1712
1713	{	2067	{
1714	int active = ((W)w)->active;	2068	int active = ev_active (w);
1715		2069
		2070	assert (("internal periodic heap corruption", periodics [active] == (WT)w));
		2071
1716	if (expect_true (--active < --periodiccnt))	2072	if (expect_true (active < periodiccnt + HEAP0 - 1))
1717	{	2073	{
1718	periodics [active] = periodics [periodiccnt];	2074	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1719	adjustheap ((WT *)periodics, periodiccnt, active);	2075	adjustheap (periodics, periodiccnt, active);
1720	}	2076	}
		2077
		2078	--periodiccnt;
1721	}	2079	}
1722		2080
1723	ev_stop (EV_A_ (W)w);	2081	ev_stop (EV_A_ (W)w);
1724	}	2082	}
1725		2083
1726	void	2084	void noinline
1727	ev_periodic_again (EV_P_ ev_periodic *w)	2085	ev_periodic_again (EV_P_ ev_periodic *w)
1728	{	2086	{
1729	/* TODO: use adjustheap and recalculation */	2087	/* TODO: use adjustheap and recalculation */
1730	ev_periodic_stop (EV_A_ w);	2088	ev_periodic_stop (EV_A_ w);
1731	ev_periodic_start (EV_A_ w);	2089	ev_periodic_start (EV_A_ w);
…		…
1734		2092
1735	#ifndef SA_RESTART	2093	#ifndef SA_RESTART
1736	# define SA_RESTART 0	2094	# define SA_RESTART 0
1737	#endif	2095	#endif
1738		2096
1739	void	2097	void noinline
1740	ev_signal_start (EV_P_ ev_signal *w)	2098	ev_signal_start (EV_P_ ev_signal *w)
1741	{	2099	{
1742	#if EV_MULTIPLICITY	2100	#if EV_MULTIPLICITY
1743	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2101	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1744	#endif	2102	#endif
1745	if (expect_false (ev_is_active (w)))	2103	if (expect_false (ev_is_active (w)))
1746	return;	2104	return;
1747		2105
1748	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2106	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1749		2107
		2108	evpipe_init (EV_A);
		2109
		2110	{
		2111	#ifndef _WIN32
		2112	sigset_t full, prev;
		2113	sigfillset (&full);
		2114	sigprocmask (SIG_SETMASK, &full, &prev);
		2115	#endif
		2116
		2117	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2118
		2119	#ifndef _WIN32
		2120	sigprocmask (SIG_SETMASK, &prev, 0);
		2121	#endif
		2122	}
		2123
1750	ev_start (EV_A_ (W)w, 1);	2124	ev_start (EV_A_ (W)w, 1);
1751	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1752	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2125	wlist_add (&signals [w->signum - 1].head, (WL)w);
1753		2126
1754	if (!((WL)w)->next)	2127	if (!((WL)w)->next)
1755	{	2128	{
1756	#if _WIN32	2129	#if _WIN32
1757	signal (w->signum, sighandler);	2130	signal (w->signum, ev_sighandler);
1758	#else	2131	#else
1759	struct sigaction sa;	2132	struct sigaction sa;
1760	sa.sa_handler = sighandler;	2133	sa.sa_handler = ev_sighandler;
1761	sigfillset (&sa.sa_mask);	2134	sigfillset (&sa.sa_mask);
1762	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2135	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1763	sigaction (w->signum, &sa, 0);	2136	sigaction (w->signum, &sa, 0);
1764	#endif	2137	#endif
1765	}	2138	}
1766	}	2139	}
1767		2140
1768	void	2141	void noinline
1769	ev_signal_stop (EV_P_ ev_signal *w)	2142	ev_signal_stop (EV_P_ ev_signal *w)
1770	{	2143	{
1771	clear_pending (EV_A_ (W)w);	2144	clear_pending (EV_A_ (W)w);
1772	if (expect_false (!ev_is_active (w)))	2145	if (expect_false (!ev_is_active (w)))
1773	return;	2146	return;
1774		2147
1775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2148	wlist_del (&signals [w->signum - 1].head, (WL)w);
1776	ev_stop (EV_A_ (W)w);	2149	ev_stop (EV_A_ (W)w);
1777		2150
1778	if (!signals [w->signum - 1].head)	2151	if (!signals [w->signum - 1].head)
1779	signal (w->signum, SIG_DFL);	2152	signal (w->signum, SIG_DFL);
1780	}	2153	}
…		…
1787	#endif	2160	#endif
1788	if (expect_false (ev_is_active (w)))	2161	if (expect_false (ev_is_active (w)))
1789	return;	2162	return;
1790		2163
1791	ev_start (EV_A_ (W)w, 1);	2164	ev_start (EV_A_ (W)w, 1);
1792	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2165	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1793	}	2166	}
1794		2167
1795	void	2168	void
1796	ev_child_stop (EV_P_ ev_child *w)	2169	ev_child_stop (EV_P_ ev_child *w)
1797	{	2170	{
1798	clear_pending (EV_A_ (W)w);	2171	clear_pending (EV_A_ (W)w);
1799	if (expect_false (!ev_is_active (w)))	2172	if (expect_false (!ev_is_active (w)))
1800	return;	2173	return;
1801		2174
1802	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2175	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1803	ev_stop (EV_A_ (W)w);	2176	ev_stop (EV_A_ (W)w);
1804	}	2177	}
1805		2178
1806	#if EV_STAT_ENABLE	2179	#if EV_STAT_ENABLE
1807		2180
…		…
1826	if (w->wd < 0)	2199	if (w->wd < 0)
1827	{	2200	{
1828	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2201	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1829		2202
1830	/* monitor some parent directory for speedup hints */	2203	/* monitor some parent directory for speedup hints */
		2204	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2205	/* but an efficiency issue only */
1831	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2206	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
1832	{	2207	{
1833	char path [4096];	2208	char path [4096];
1834	strcpy (path, w->path);	2209	strcpy (path, w->path);
1835		2210
…		…
2080	clear_pending (EV_A_ (W)w);	2455	clear_pending (EV_A_ (W)w);
2081	if (expect_false (!ev_is_active (w)))	2456	if (expect_false (!ev_is_active (w)))
2082	return;	2457	return;
2083		2458
2084	{	2459	{
2085	int active = ((W)w)->active;	2460	int active = ev_active (w);
2086		2461
2087	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	2462	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2088	((W)idles [ABSPRI (w)][active - 1])->active = active;	2463	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2089		2464
2090	ev_stop (EV_A_ (W)w);	2465	ev_stop (EV_A_ (W)w);
2091	--idleall;	2466	--idleall;
2092	}	2467	}
2093	}	2468	}
…		…
2110	clear_pending (EV_A_ (W)w);	2485	clear_pending (EV_A_ (W)w);
2111	if (expect_false (!ev_is_active (w)))	2486	if (expect_false (!ev_is_active (w)))
2112	return;	2487	return;
2113		2488
2114	{	2489	{
2115	int active = ((W)w)->active;	2490	int active = ev_active (w);
		2491
2116	prepares [active - 1] = prepares [--preparecnt];	2492	prepares [active - 1] = prepares [--preparecnt];
2117	((W)prepares [active - 1])->active = active;	2493	ev_active (prepares [active - 1]) = active;
2118	}	2494	}
2119		2495
2120	ev_stop (EV_A_ (W)w);	2496	ev_stop (EV_A_ (W)w);
2121	}	2497	}
2122		2498
…		…
2137	clear_pending (EV_A_ (W)w);	2513	clear_pending (EV_A_ (W)w);
2138	if (expect_false (!ev_is_active (w)))	2514	if (expect_false (!ev_is_active (w)))
2139	return;	2515	return;
2140		2516
2141	{	2517	{
2142	int active = ((W)w)->active;	2518	int active = ev_active (w);
		2519
2143	checks [active - 1] = checks [--checkcnt];	2520	checks [active - 1] = checks [--checkcnt];
2144	((W)checks [active - 1])->active = active;	2521	ev_active (checks [active - 1]) = active;
2145	}	2522	}
2146		2523
2147	ev_stop (EV_A_ (W)w);	2524	ev_stop (EV_A_ (W)w);
2148	}	2525	}
2149		2526
2150	#if EV_EMBED_ENABLE	2527	#if EV_EMBED_ENABLE
2151	void noinline	2528	void noinline
2152	ev_embed_sweep (EV_P_ ev_embed *w)	2529	ev_embed_sweep (EV_P_ ev_embed *w)
2153	{	2530	{
2154	ev_loop (w->loop, EVLOOP_NONBLOCK);	2531	ev_loop (w->other, EVLOOP_NONBLOCK);
2155	}	2532	}
2156		2533
2157	static void	2534	static void
2158	embed_cb (EV_P_ ev_io *io, int revents)	2535	embed_io_cb (EV_P_ ev_io *io, int revents)
2159	{	2536	{
2160	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2537	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
2161		2538
2162	if (ev_cb (w))	2539	if (ev_cb (w))
2163	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2540	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2164	else	2541	else
2165	ev_embed_sweep (loop, w);	2542	ev_loop (w->other, EVLOOP_NONBLOCK);
2166	}	2543	}
		2544
		2545	static void
		2546	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2547	{
		2548	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2549
		2550	{
		2551	struct ev_loop *loop = w->other;
		2552
		2553	while (fdchangecnt)
		2554	{
		2555	fd_reify (EV_A);
		2556	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2557	}
		2558	}
		2559	}
		2560
		2561	#if 0
		2562	static void
		2563	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2564	{
		2565	ev_idle_stop (EV_A_ idle);
		2566	}
		2567	#endif
2167		2568
2168	void	2569	void
2169	ev_embed_start (EV_P_ ev_embed *w)	2570	ev_embed_start (EV_P_ ev_embed *w)
2170	{	2571	{
2171	if (expect_false (ev_is_active (w)))	2572	if (expect_false (ev_is_active (w)))
2172	return;	2573	return;
2173		2574
2174	{	2575	{
2175	struct ev_loop *loop = w->loop;	2576	struct ev_loop *loop = w->other;
2176	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2577	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2177	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2578	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2178	}	2579	}
2179		2580
2180	ev_set_priority (&w->io, ev_priority (w));	2581	ev_set_priority (&w->io, ev_priority (w));
2181	ev_io_start (EV_A_ &w->io);	2582	ev_io_start (EV_A_ &w->io);
		2583
		2584	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2585	ev_set_priority (&w->prepare, EV_MINPRI);
		2586	ev_prepare_start (EV_A_ &w->prepare);
		2587
		2588	/ev_idle_init (&w->idle, e,bed_idle_cb);/
2182		2589
2183	ev_start (EV_A_ (W)w, 1);	2590	ev_start (EV_A_ (W)w, 1);
2184	}	2591	}
2185		2592
2186	void	2593	void
…		…
2189	clear_pending (EV_A_ (W)w);	2596	clear_pending (EV_A_ (W)w);
2190	if (expect_false (!ev_is_active (w)))	2597	if (expect_false (!ev_is_active (w)))
2191	return;	2598	return;
2192		2599
2193	ev_io_stop (EV_A_ &w->io);	2600	ev_io_stop (EV_A_ &w->io);
		2601	ev_prepare_stop (EV_A_ &w->prepare);
2194		2602
2195	ev_stop (EV_A_ (W)w);	2603	ev_stop (EV_A_ (W)w);
2196	}	2604	}
2197	#endif	2605	#endif
2198		2606
…		…
2214	clear_pending (EV_A_ (W)w);	2622	clear_pending (EV_A_ (W)w);
2215	if (expect_false (!ev_is_active (w)))	2623	if (expect_false (!ev_is_active (w)))
2216	return;	2624	return;
2217		2625
2218	{	2626	{
2219	int active = ((W)w)->active;	2627	int active = ev_active (w);
		2628
2220	forks [active - 1] = forks [--forkcnt];	2629	forks [active - 1] = forks [--forkcnt];
2221	((W)forks [active - 1])->active = active;	2630	ev_active (forks [active - 1]) = active;
2222	}	2631	}
2223		2632
2224	ev_stop (EV_A_ (W)w);	2633	ev_stop (EV_A_ (W)w);
		2634	}
		2635	#endif
		2636
		2637	#if EV_ASYNC_ENABLE
		2638	void
		2639	ev_async_start (EV_P_ ev_async *w)
		2640	{
		2641	if (expect_false (ev_is_active (w)))
		2642	return;
		2643
		2644	evpipe_init (EV_A);
		2645
		2646	ev_start (EV_A_ (W)w, ++asynccnt);
		2647	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2648	asyncs [asynccnt - 1] = w;
		2649	}
		2650
		2651	void
		2652	ev_async_stop (EV_P_ ev_async *w)
		2653	{
		2654	clear_pending (EV_A_ (W)w);
		2655	if (expect_false (!ev_is_active (w)))
		2656	return;
		2657
		2658	{
		2659	int active = ev_active (w);
		2660
		2661	asyncs [active - 1] = asyncs [--asynccnt];
		2662	ev_active (asyncs [active - 1]) = active;
		2663	}
		2664
		2665	ev_stop (EV_A_ (W)w);
		2666	}
		2667
		2668	void
		2669	ev_async_send (EV_P_ ev_async *w)
		2670	{
		2671	w->sent = 1;
		2672	evpipe_write (EV_A_ &gotasync);
2225	}	2673	}
2226	#endif	2674	#endif
2227		2675
2228	/*****************************************************************************/	2676	/*****************************************************************************/
2229		2677
…		…
2287	ev_timer_set (&once->to, timeout, 0.);	2735	ev_timer_set (&once->to, timeout, 0.);
2288	ev_timer_start (EV_A_ &once->to);	2736	ev_timer_start (EV_A_ &once->to);
2289	}	2737	}
2290	}	2738	}
2291		2739
		2740	#if EV_MULTIPLICITY
		2741	#include "ev_wrap.h"
		2742	#endif
		2743
2292	#ifdef __cplusplus	2744	#ifdef __cplusplus
2293	}	2745	}
2294	#endif	2746	#endif
2295		2747

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Comparing libev/ev.c (file contents): Revision 1.168 by root, Sat Dec 8 14:12:07 2007 UTC vs. Revision 1.236 by root, Wed May 7 14:46:22 2008 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.168 by root, Sat Dec 8 14:12:07 2007 UTC vs.
Revision 1.236 by root, Wed May 7 14:46:22 2008 UTC