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

Comparing libev/ev.c (file contents):
Revision 1.183 by root, Wed Dec 12 05:11:56 2007 UTC vs.
Revision 1.228 by root, Fri May 2 08:07:37 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	/**/
220		284
221	/*	285	/*
…		…
230		294
231	#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) */
232	#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) */
233	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */	297	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
234		298
235	#if __GNUC__ >= 3	299	#if __GNUC__ >= 4
236	# define expect(expr,value) __builtin_expect ((expr),(value))	300	# define expect(expr,value) __builtin_expect ((expr),(value))
237	# define noinline __attribute__ ((noinline))	301	# define noinline __attribute__ ((noinline))
238	#else	302	#else
239	# define expect(expr,value) (expr)	303	# define expect(expr,value) (expr)
240	# define noinline	304	# define noinline
241	# if __STDC_VERSION__ < 199901L	305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
242	# define inline	306	# define inline
243	# endif	307	# endif
244	#endif	308	#endif
245		309
246	#define expect_false(expr) expect ((expr) != 0, 0)	310	#define expect_false(expr) expect ((expr) != 0, 0)
…		…
261		325
262	typedef ev_watcher *W;	326	typedef ev_watcher *W;
263	typedef ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
264	typedef ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
265		329
		330	#define ev_at(w) ((WT)(w))->at
		331
		332	#if EV_USE_MONOTONIC
		333	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		334	/* giving it a reasonably high chance of working on typical architetcures */
266	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	335	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		336	#endif
267		337
268	#ifdef _WIN32	338	#ifdef _WIN32
269	# include "ev_win32.c"	339	# include "ev_win32.c"
270	#endif	340	#endif
271		341
…		…
292	perror (msg);	362	perror (msg);
293	abort ();	363	abort ();
294	}	364	}
295	}	365	}
296		366
		367	static void *
		368	ev_realloc_emul (void *ptr, long size)
		369	{
		370	/* some systems, notably openbsd and darwin, fail to properly
		371	* implement realloc (x, 0) (as required by both ansi c-98 and
		372	* the single unix specification, so work around them here.
		373	*/
		374
		375	if (size)
		376	return realloc (ptr, size);
		377
		378	free (ptr);
		379	return 0;
		380	}
		381
297	static void (alloc)(void *ptr, long size);	382	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
298		383
299	void	384	void
300	ev_set_allocator (void (cb)(void *ptr, long size))	385	ev_set_allocator (void (cb)(void *ptr, long size))
301	{	386	{
302	alloc = cb;	387	alloc = cb;
303	}	388	}
304		389
305	inline_speed void *	390	inline_speed void *
306	ev_realloc (void *ptr, long size)	391	ev_realloc (void *ptr, long size)
307	{	392	{
308	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	393	ptr = alloc (ptr, size);
309		394
310	if (!ptr && size)	395	if (!ptr && size)
311	{	396	{
312	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	397	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
313	abort ();	398	abort ();
…		…
407	{	492	{
408	return ev_rt_now;	493	return ev_rt_now;
409	}	494	}
410	#endif	495	#endif
411		496
		497	void
		498	ev_sleep (ev_tstamp delay)
		499	{
		500	if (delay > 0.)
		501	{
		502	#if EV_USE_NANOSLEEP
		503	struct timespec ts;
		504
		505	ts.tv_sec = (time_t)delay;
		506	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		507
		508	nanosleep (&ts, 0);
		509	#elif defined(_WIN32)
		510	Sleep ((unsigned long)(delay * 1e3));
		511	#else
		512	struct timeval tv;
		513
		514	tv.tv_sec = (time_t)delay;
		515	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		516
		517	select (0, 0, 0, 0, &tv);
		518	#endif
		519	}
		520	}
		521
		522	/*****************************************************************************/
		523
412	int inline_size	524	int inline_size
413	array_nextsize (int elem, int cur, int cnt)	525	array_nextsize (int elem, int cur, int cnt)
414	{	526	{
415	int ncur = cur + 1;	527	int ncur = cur + 1;
416		528
…		…
533	{	645	{
534	int fd = fdchanges [i];	646	int fd = fdchanges [i];
535	ANFD *anfd = anfds + fd;	647	ANFD *anfd = anfds + fd;
536	ev_io *w;	648	ev_io *w;
537		649
538	int events = 0;	650	unsigned char events = 0;
539		651
540	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	652	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
541	events \|= w->events;	653	events \|= (unsigned char)w->events;
542		654
543	#if EV_SELECT_IS_WINSOCKET	655	#if EV_SELECT_IS_WINSOCKET
544	if (events)	656	if (events)
545	{	657	{
546	unsigned long argp;	658	unsigned long argp;
		659	#ifdef EV_FD_TO_WIN32_HANDLE
		660	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		661	#else
547	anfd->handle = _get_osfhandle (fd);	662	anfd->handle = _get_osfhandle (fd);
		663	#endif
548	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	664	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
549	}	665	}
550	#endif	666	#endif
551		667
		668	{
		669	unsigned char o_events = anfd->events;
		670	unsigned char o_reify = anfd->reify;
		671
552	anfd->reify = 0;	672	anfd->reify = 0;
553
554	backend_modify (EV_A_ fd, anfd->events, events);
555	anfd->events = events;	673	anfd->events = events;
		674
		675	if (o_events != events \|\| o_reify & EV_IOFDSET)
		676	backend_modify (EV_A_ fd, o_events, events);
		677	}
556	}	678	}
557		679
558	fdchangecnt = 0;	680	fdchangecnt = 0;
559	}	681	}
560		682
561	void inline_size	683	void inline_size
562	fd_change (EV_P_ int fd, int flags)	684	fd_change (EV_P_ int fd, int flags)
563	{	685	{
564	unsigned char reify = anfds [fd].reify;	686	unsigned char reify = anfds [fd].reify;
565	anfds [fd].reify \|= flags \| 1;	687	anfds [fd].reify \|= flags;
566		688
567	if (expect_true (!reify))	689	if (expect_true (!reify))
568	{	690	{
569	++fdchangecnt;	691	++fdchangecnt;
570	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	692	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
…		…
628		750
629	for (fd = 0; fd < anfdmax; ++fd)	751	for (fd = 0; fd < anfdmax; ++fd)
630	if (anfds [fd].events)	752	if (anfds [fd].events)
631	{	753	{
632	anfds [fd].events = 0;	754	anfds [fd].events = 0;
633	fd_change (EV_A_ fd, EV_IOFDSET);	755	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
634	}	756	}
635	}	757	}
636		758
637	/*****************************************************************************/	759	/*****************************************************************************/
638		760
		761	/* towards the root */
639	void inline_speed	762	void inline_speed
640	upheap (WT *heap, int k)	763	upheap (WT *heap, int k)
641	{	764	{
642	WT w = heap [k];	765	WT w = heap [k];
643		766
644	while (k)	767	for (;;)
645	{	768	{
646	int p = (k - 1) >> 1;	769	int p = k >> 1;
647		770
		771	/* maybe we could use a dummy element at heap [0]? */
648	if (heap [p]->at <= w->at)	772	if (!p \|\| heap [p]->at <= w->at)
649	break;	773	break;
650		774
651	heap [k] = heap [p];	775	heap [k] = heap [p];
652	((W)heap [k])->active = k + 1;	776	((W)heap [k])->active = k;
653	k = p;	777	k = p;
654	}	778	}
655		779
656	heap [k] = w;	780	heap [k] = w;
657	((W)heap [k])->active = k + 1;	781	((W)heap [k])->active = k;
658	}	782	}
659		783
		784	/* away from the root */
660	void inline_speed	785	void inline_speed
661	downheap (WT *heap, int N, int k)	786	downheap (WT *heap, int N, int k)
662	{	787	{
663	WT w = heap [k];	788	WT w = heap [k];
664		789
665	for (;;)	790	for (;;)
666	{	791	{
667	int c = (k << 1) + 1;	792	int c = k << 1;
668		793
669	if (c >= N)	794	if (c > N)
670	break;	795	break;
671		796
672	c += c + 1 < N && heap [c]->at > heap [c + 1]->at	797	c += c < N && heap [c]->at > heap [c + 1]->at
673	? 1 : 0;	798	? 1 : 0;
674		799
675	if (w->at <= heap [c]->at)	800	if (w->at <= heap [c]->at)
676	break;	801	break;
677		802
678	heap [k] = heap [c];	803	heap [k] = heap [c];
679	((W)heap [k])->active = k + 1;	804	((W)heap [k])->active = k;
680		805
681	k = c;	806	k = c;
682	}	807	}
683		808
684	heap [k] = w;	809	heap [k] = w;
685	((W)heap [k])->active = k + 1;	810	((W)heap [k])->active = k;
686	}	811	}
687		812
688	void inline_size	813	void inline_size
689	adjustheap (WT *heap, int N, int k)	814	adjustheap (WT *heap, int N, int k)
690	{	815	{
…		…
695	/*****************************************************************************/	820	/*****************************************************************************/
696		821
697	typedef struct	822	typedef struct
698	{	823	{
699	WL head;	824	WL head;
700	sig_atomic_t volatile gotsig;	825	EV_ATOMIC_T gotsig;
701	} ANSIG;	826	} ANSIG;
702		827
703	static ANSIG *signals;	828	static ANSIG *signals;
704	static int signalmax;	829	static int signalmax;
705		830
706	static int sigpipe [2];	831	static EV_ATOMIC_T gotsig;
707	static sig_atomic_t volatile gotsig;
708	static ev_io sigev;
709		832
710	void inline_size	833	void inline_size
711	signals_init (ANSIG *base, int count)	834	signals_init (ANSIG *base, int count)
712	{	835	{
713	while (count--)	836	while (count--)
…		…
717		840
718	++base;	841	++base;
719	}	842	}
720	}	843	}
721		844
722	static void	845	/*****************************************************************************/
723	sighandler (int signum)
724	{
725	#if _WIN32
726	signal (signum, sighandler);
727	#endif
728
729	signals [signum - 1].gotsig = 1;
730
731	if (!gotsig)
732	{
733	int old_errno = errno;
734	gotsig = 1;
735	write (sigpipe [1], &signum, 1);
736	errno = old_errno;
737	}
738	}
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
760	static void
761	sigcb (EV_P_ ev_io *iow, int revents)
762	{
763	int signum;
764
765	read (sigpipe [0], &revents, 1);
766	gotsig = 0;
767
768	for (signum = signalmax; signum--; )
769	if (signals [signum].gotsig)
770	ev_feed_signal_event (EV_A_ signum + 1);
771	}
772		846
773	void inline_speed	847	void inline_speed
774	fd_intern (int fd)	848	fd_intern (int fd)
775	{	849	{
776	#ifdef _WIN32	850	#ifdef _WIN32
…		…
781	fcntl (fd, F_SETFL, O_NONBLOCK);	855	fcntl (fd, F_SETFL, O_NONBLOCK);
782	#endif	856	#endif
783	}	857	}
784		858
785	static void noinline	859	static void noinline
786	siginit (EV_P)	860	evpipe_init (EV_P)
787	{	861	{
		862	if (!ev_is_active (&pipeev))
		863	{
		864	#if EV_USE_EVENTFD
		865	if ((evfd = eventfd (0, 0)) >= 0)
		866	{
		867	evpipe [0] = -1;
		868	fd_intern (evfd);
		869	ev_io_set (&pipeev, evfd, EV_READ);
		870	}
		871	else
		872	#endif
		873	{
		874	while (pipe (evpipe))
		875	syserr ("(libev) error creating signal/async pipe");
		876
788	fd_intern (sigpipe [0]);	877	fd_intern (evpipe [0]);
789	fd_intern (sigpipe [1]);	878	fd_intern (evpipe [1]);
		879	ev_io_set (&pipeev, evpipe [0], EV_READ);
		880	}
790		881
791	ev_io_set (&sigev, sigpipe [0], EV_READ);
792	ev_io_start (EV_A_ &sigev);	882	ev_io_start (EV_A_ &pipeev);
793	ev_unref (EV_A); /* child watcher should not keep loop alive */	883	ev_unref (EV_A); /* watcher should not keep loop alive */
		884	}
		885	}
		886
		887	void inline_size
		888	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		889	{
		890	if (!*flag)
		891	{
		892	int old_errno = errno; /* save errno because write might clobber it */
		893
		894	*flag = 1;
		895
		896	#if EV_USE_EVENTFD
		897	if (evfd >= 0)
		898	{
		899	uint64_t counter = 1;
		900	write (evfd, &counter, sizeof (uint64_t));
		901	}
		902	else
		903	#endif
		904	write (evpipe [1], &old_errno, 1);
		905
		906	errno = old_errno;
		907	}
		908	}
		909
		910	static void
		911	pipecb (EV_P_ ev_io *iow, int revents)
		912	{
		913	#if EV_USE_EVENTFD
		914	if (evfd >= 0)
		915	{
		916	uint64_t counter = 1;
		917	read (evfd, &counter, sizeof (uint64_t));
		918	}
		919	else
		920	#endif
		921	{
		922	char dummy;
		923	read (evpipe [0], &dummy, 1);
		924	}
		925
		926	if (gotsig && ev_is_default_loop (EV_A))
		927	{
		928	int signum;
		929	gotsig = 0;
		930
		931	for (signum = signalmax; signum--; )
		932	if (signals [signum].gotsig)
		933	ev_feed_signal_event (EV_A_ signum + 1);
		934	}
		935
		936	#if EV_ASYNC_ENABLE
		937	if (gotasync)
		938	{
		939	int i;
		940	gotasync = 0;
		941
		942	for (i = asynccnt; i--; )
		943	if (asyncs [i]->sent)
		944	{
		945	asyncs [i]->sent = 0;
		946	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		947	}
		948	}
		949	#endif
794	}	950	}
795		951
796	/*****************************************************************************/	952	/*****************************************************************************/
797		953
		954	static void
		955	ev_sighandler (int signum)
		956	{
		957	#if EV_MULTIPLICITY
		958	struct ev_loop *loop = &default_loop_struct;
		959	#endif
		960
		961	#if _WIN32
		962	signal (signum, ev_sighandler);
		963	#endif
		964
		965	signals [signum - 1].gotsig = 1;
		966	evpipe_write (EV_A_ &gotsig);
		967	}
		968
		969	void noinline
		970	ev_feed_signal_event (EV_P_ int signum)
		971	{
		972	WL w;
		973
		974	#if EV_MULTIPLICITY
		975	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		976	#endif
		977
		978	--signum;
		979
		980	if (signum < 0 \|\| signum >= signalmax)
		981	return;
		982
		983	signals [signum].gotsig = 0;
		984
		985	for (w = signals [signum].head; w; w = w->next)
		986	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		987	}
		988
		989	/*****************************************************************************/
		990
798	static WL childs [EV_PID_HASHSIZE];	991	static WL childs [EV_PID_HASHSIZE];
799		992
800	#ifndef _WIN32	993	#ifndef _WIN32
801		994
802	static ev_signal childev;	995	static ev_signal childev;
803		996
		997	#ifndef WIFCONTINUED
		998	# define WIFCONTINUED(status) 0
		999	#endif
		1000
804	void inline_speed	1001	void inline_speed
805	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1002	child_reap (EV_P_ int chain, int pid, int status)
806	{	1003	{
807	ev_child *w;	1004	ev_child *w;
		1005	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
808		1006
809	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1007	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		1008	{
810	if (w->pid == pid \|\| !w->pid)	1009	if ((w->pid == pid \|\| !w->pid)
		1010	&& (!traced \|\| (w->flags & 1)))
811	{	1011	{
812	ev_set_priority (w, ev_priority (sw)); /* need to do it now */	1012	ev_set_priority (w, EV_MAXPRI); /* need to do it now, this must be the same prio as the signal watcher itself */
813	w->rpid = pid;	1013	w->rpid = pid;
814	w->rstatus = status;	1014	w->rstatus = status;
815	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1015	ev_feed_event (EV_A_ (W)w, EV_CHILD);
816	}	1016	}
		1017	}
817	}	1018	}
818		1019
819	#ifndef WCONTINUED	1020	#ifndef WCONTINUED
820	# define WCONTINUED 0	1021	# define WCONTINUED 0
821	#endif	1022	#endif
…		…
830	if (!WCONTINUED	1031	if (!WCONTINUED
831	\|\| errno != EINVAL	1032	\|\| errno != EINVAL
832	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))	1033	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
833	return;	1034	return;
834		1035
835	/* make sure we are called again until all childs have been reaped */	1036	/* make sure we are called again until all children have been reaped */
836	/* we need to do it this way so that the callback gets called before we continue */	1037	/* we need to do it this way so that the callback gets called before we continue */
837	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1038	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
838		1039
839	child_reap (EV_A_ sw, pid, pid, status);	1040	child_reap (EV_A_ pid, pid, status);
840	if (EV_PID_HASHSIZE > 1)	1041	if (EV_PID_HASHSIZE > 1)
841	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1042	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
842	}	1043	}
843		1044
844	#endif	1045	#endif
845		1046
846	/*****************************************************************************/	1047	/*****************************************************************************/
…		…
918	}	1119	}
919		1120
920	unsigned int	1121	unsigned int
921	ev_embeddable_backends (void)	1122	ev_embeddable_backends (void)
922	{	1123	{
923	return EVBACKEND_EPOLL	1124	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
924	\| EVBACKEND_KQUEUE	1125
925	\| EVBACKEND_PORT;	1126	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1127	/* please fix it and tell me how to detect the fix */
		1128	flags &= ~EVBACKEND_EPOLL;
		1129
		1130	return flags;
926	}	1131	}
927		1132
928	unsigned int	1133	unsigned int
929	ev_backend (EV_P)	1134	ev_backend (EV_P)
930	{	1135	{
…		…
933		1138
934	unsigned int	1139	unsigned int
935	ev_loop_count (EV_P)	1140	ev_loop_count (EV_P)
936	{	1141	{
937	return loop_count;	1142	return loop_count;
		1143	}
		1144
		1145	void
		1146	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1147	{
		1148	io_blocktime = interval;
		1149	}
		1150
		1151	void
		1152	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1153	{
		1154	timeout_blocktime = interval;
938	}	1155	}
939		1156
940	static void noinline	1157	static void noinline
941	loop_init (EV_P_ unsigned int flags)	1158	loop_init (EV_P_ unsigned int flags)
942	{	1159	{
…		…
948	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1165	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
949	have_monotonic = 1;	1166	have_monotonic = 1;
950	}	1167	}
951	#endif	1168	#endif
952		1169
953	ev_rt_now = ev_time ();	1170	ev_rt_now = ev_time ();
954	mn_now = get_clock ();	1171	mn_now = get_clock ();
955	now_floor = mn_now;	1172	now_floor = mn_now;
956	rtmn_diff = ev_rt_now - mn_now;	1173	rtmn_diff = ev_rt_now - mn_now;
		1174
		1175	io_blocktime = 0.;
		1176	timeout_blocktime = 0.;
		1177	backend = 0;
		1178	backend_fd = -1;
		1179	gotasync = 0;
		1180	#if EV_USE_INOTIFY
		1181	fs_fd = -2;
		1182	#endif
957		1183
958	/* pid check not overridable via env */	1184	/* pid check not overridable via env */
959	#ifndef _WIN32	1185	#ifndef _WIN32
960	if (flags & EVFLAG_FORKCHECK)	1186	if (flags & EVFLAG_FORKCHECK)
961	curpid = getpid ();	1187	curpid = getpid ();
…		…
964	if (!(flags & EVFLAG_NOENV)	1190	if (!(flags & EVFLAG_NOENV)
965	&& !enable_secure ()	1191	&& !enable_secure ()
966	&& getenv ("LIBEV_FLAGS"))	1192	&& getenv ("LIBEV_FLAGS"))
967	flags = atoi (getenv ("LIBEV_FLAGS"));	1193	flags = atoi (getenv ("LIBEV_FLAGS"));
968		1194
969	if (!(flags & 0x0000ffffUL))	1195	if (!(flags & 0x0000ffffU))
970	flags \|= ev_recommended_backends ();	1196	flags \|= ev_recommended_backends ();
971
972	backend = 0;
973	backend_fd = -1;
974	#if EV_USE_INOTIFY
975	fs_fd = -2;
976	#endif
977		1197
978	#if EV_USE_PORT	1198	#if EV_USE_PORT
979	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1199	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
980	#endif	1200	#endif
981	#if EV_USE_KQUEUE	1201	#if EV_USE_KQUEUE
…		…
989	#endif	1209	#endif
990	#if EV_USE_SELECT	1210	#if EV_USE_SELECT
991	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1211	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
992	#endif	1212	#endif
993		1213
994	ev_init (&sigev, sigcb);	1214	ev_init (&pipeev, pipecb);
995	ev_set_priority (&sigev, EV_MAXPRI);	1215	ev_set_priority (&pipeev, EV_MAXPRI);
996	}	1216	}
997	}	1217	}
998		1218
999	static void noinline	1219	static void noinline
1000	loop_destroy (EV_P)	1220	loop_destroy (EV_P)
1001	{	1221	{
1002	int i;	1222	int i;
		1223
		1224	if (ev_is_active (&pipeev))
		1225	{
		1226	ev_ref (EV_A); /* signal watcher */
		1227	ev_io_stop (EV_A_ &pipeev);
		1228
		1229	#if EV_USE_EVENTFD
		1230	if (evfd >= 0)
		1231	close (evfd);
		1232	#endif
		1233
		1234	if (evpipe [0] >= 0)
		1235	{
		1236	close (evpipe [0]);
		1237	close (evpipe [1]);
		1238	}
		1239	}
1003		1240
1004	#if EV_USE_INOTIFY	1241	#if EV_USE_INOTIFY
1005	if (fs_fd >= 0)	1242	if (fs_fd >= 0)
1006	close (fs_fd);	1243	close (fs_fd);
1007	#endif	1244	#endif
…		…
1030	array_free (pending, [i]);	1267	array_free (pending, [i]);
1031	#if EV_IDLE_ENABLE	1268	#if EV_IDLE_ENABLE
1032	array_free (idle, [i]);	1269	array_free (idle, [i]);
1033	#endif	1270	#endif
1034	}	1271	}
		1272
		1273	ev_free (anfds); anfdmax = 0;
1035		1274
1036	/* have to use the microsoft-never-gets-it-right macro */	1275	/* have to use the microsoft-never-gets-it-right macro */
1037	array_free (fdchange, EMPTY);	1276	array_free (fdchange, EMPTY);
1038	array_free (timer, EMPTY);	1277	array_free (timer, EMPTY);
1039	#if EV_PERIODIC_ENABLE	1278	#if EV_PERIODIC_ENABLE
1040	array_free (periodic, EMPTY);	1279	array_free (periodic, EMPTY);
1041	#endif	1280	#endif
		1281	#if EV_FORK_ENABLE
		1282	array_free (fork, EMPTY);
		1283	#endif
1042	array_free (prepare, EMPTY);	1284	array_free (prepare, EMPTY);
1043	array_free (check, EMPTY);	1285	array_free (check, EMPTY);
		1286	#if EV_ASYNC_ENABLE
		1287	array_free (async, EMPTY);
		1288	#endif
1044		1289
1045	backend = 0;	1290	backend = 0;
1046	}	1291	}
1047		1292
		1293	#if EV_USE_INOTIFY
1048	void inline_size infy_fork (EV_P);	1294	void inline_size infy_fork (EV_P);
		1295	#endif
1049		1296
1050	void inline_size	1297	void inline_size
1051	loop_fork (EV_P)	1298	loop_fork (EV_P)
1052	{	1299	{
1053	#if EV_USE_PORT	1300	#if EV_USE_PORT
…		…
1061	#endif	1308	#endif
1062	#if EV_USE_INOTIFY	1309	#if EV_USE_INOTIFY
1063	infy_fork (EV_A);	1310	infy_fork (EV_A);
1064	#endif	1311	#endif
1065		1312
1066	if (ev_is_active (&sigev))	1313	if (ev_is_active (&pipeev))
1067	{	1314	{
1068	/* default loop */	1315	/* this "locks" the handlers against writing to the pipe */
		1316	/* while we modify the fd vars */
		1317	gotsig = 1;
		1318	#if EV_ASYNC_ENABLE
		1319	gotasync = 1;
		1320	#endif
1069		1321
1070	ev_ref (EV_A);	1322	ev_ref (EV_A);
1071	ev_io_stop (EV_A_ &sigev);	1323	ev_io_stop (EV_A_ &pipeev);
		1324
		1325	#if EV_USE_EVENTFD
		1326	if (evfd >= 0)
		1327	close (evfd);
		1328	#endif
		1329
		1330	if (evpipe [0] >= 0)
		1331	{
1072	close (sigpipe [0]);	1332	close (evpipe [0]);
1073	close (sigpipe [1]);	1333	close (evpipe [1]);
		1334	}
1074		1335
1075	while (pipe (sigpipe))
1076	syserr ("(libev) error creating pipe");
1077
1078	siginit (EV_A);	1336	evpipe_init (EV_A);
		1337	/* now iterate over everything, in case we missed something */
		1338	pipecb (EV_A_ &pipeev, EV_READ);
1079	}	1339	}
1080		1340
1081	postfork = 0;	1341	postfork = 0;
1082	}	1342	}
1083		1343
…		…
1105	}	1365	}
1106		1366
1107	void	1367	void
1108	ev_loop_fork (EV_P)	1368	ev_loop_fork (EV_P)
1109	{	1369	{
1110	postfork = 1;	1370	postfork = 1; /* must be in line with ev_default_fork */
1111	}	1371	}
1112		1372
1113	#endif	1373	#endif
1114		1374
1115	#if EV_MULTIPLICITY	1375	#if EV_MULTIPLICITY
…		…
1118	#else	1378	#else
1119	int	1379	int
1120	ev_default_loop (unsigned int flags)	1380	ev_default_loop (unsigned int flags)
1121	#endif	1381	#endif
1122	{	1382	{
1123	if (sigpipe [0] == sigpipe [1])
1124	if (pipe (sigpipe))
1125	return 0;
1126
1127	if (!ev_default_loop_ptr)	1383	if (!ev_default_loop_ptr)
1128	{	1384	{
1129	#if EV_MULTIPLICITY	1385	#if EV_MULTIPLICITY
1130	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1386	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1131	#else	1387	#else
…		…
1134		1390
1135	loop_init (EV_A_ flags);	1391	loop_init (EV_A_ flags);
1136		1392
1137	if (ev_backend (EV_A))	1393	if (ev_backend (EV_A))
1138	{	1394	{
1139	siginit (EV_A);
1140
1141	#ifndef _WIN32	1395	#ifndef _WIN32
1142	ev_signal_init (&childev, childcb, SIGCHLD);	1396	ev_signal_init (&childev, childcb, SIGCHLD);
1143	ev_set_priority (&childev, EV_MAXPRI);	1397	ev_set_priority (&childev, EV_MAXPRI);
1144	ev_signal_start (EV_A_ &childev);	1398	ev_signal_start (EV_A_ &childev);
1145	ev_unref (EV_A); /* child watcher should not keep loop alive */	1399	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1162	#ifndef _WIN32	1416	#ifndef _WIN32
1163	ev_ref (EV_A); /* child watcher */	1417	ev_ref (EV_A); /* child watcher */
1164	ev_signal_stop (EV_A_ &childev);	1418	ev_signal_stop (EV_A_ &childev);
1165	#endif	1419	#endif
1166		1420
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);	1421	loop_destroy (EV_A);
1174	}	1422	}
1175		1423
1176	void	1424	void
1177	ev_default_fork (void)	1425	ev_default_fork (void)
…		…
1179	#if EV_MULTIPLICITY	1427	#if EV_MULTIPLICITY
1180	struct ev_loop *loop = ev_default_loop_ptr;	1428	struct ev_loop *loop = ev_default_loop_ptr;
1181	#endif	1429	#endif
1182		1430
1183	if (backend)	1431	if (backend)
1184	postfork = 1;	1432	postfork = 1; /* must be in line with ev_loop_fork */
1185	}	1433	}
1186		1434
1187	/*****************************************************************************/	1435	/*****************************************************************************/
1188		1436
1189	void	1437	void
…		…
1213	}	1461	}
1214		1462
1215	void inline_size	1463	void inline_size
1216	timers_reify (EV_P)	1464	timers_reify (EV_P)
1217	{	1465	{
1218	while (timercnt && ((WT)timers [0])->at <= mn_now)	1466	while (timercnt && ev_at (timers [1]) <= mn_now)
1219	{	1467	{
1220	ev_timer w = (ev_timer )timers [0];	1468	ev_timer w = (ev_timer )timers [1];
1221		1469
1222	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/	1470	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
1223		1471
1224	/* first reschedule or stop timer */	1472	/* first reschedule or stop timer */
1225	if (w->repeat)	1473	if (w->repeat)
1226	{	1474	{
1227	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1475	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1228		1476
1229	((WT)w)->at += w->repeat;	1477	ev_at (w) += w->repeat;
1230	if (((WT)w)->at < mn_now)	1478	if (ev_at (w) < mn_now)
1231	((WT)w)->at = mn_now;	1479	ev_at (w) = mn_now;
1232		1480
1233	downheap (timers, timercnt, 0);	1481	downheap (timers, timercnt, 1);
1234	}	1482	}
1235	else	1483	else
1236	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1484	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1237		1485
1238	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1486	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
…		…
1241		1489
1242	#if EV_PERIODIC_ENABLE	1490	#if EV_PERIODIC_ENABLE
1243	void inline_size	1491	void inline_size
1244	periodics_reify (EV_P)	1492	periodics_reify (EV_P)
1245	{	1493	{
1246	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1494	while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
1247	{	1495	{
1248	ev_periodic w = (ev_periodic )periodics [0];	1496	ev_periodic w = (ev_periodic )periodics [1];
1249		1497
1250	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/	1498	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
1251		1499
1252	/* first reschedule or stop timer */	1500	/* first reschedule or stop timer */
1253	if (w->reschedule_cb)	1501	if (w->reschedule_cb)
1254	{	1502	{
1255	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);	1503	ev_at (w) = 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));	1504	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1257	downheap (periodics, periodiccnt, 0);	1505	downheap (periodics, periodiccnt, 1);
1258	}	1506	}
1259	else if (w->interval)	1507	else if (w->interval)
1260	{	1508	{
1261	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	1509	ev_at (w) = 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;	1510	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1263	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1511	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1264	downheap (periodics, periodiccnt, 0);	1512	downheap (periodics, periodiccnt, 1);
1265	}	1513	}
1266	else	1514	else
1267	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1515	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1268		1516
1269	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1517	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
…		…
1279	for (i = 0; i < periodiccnt; ++i)	1527	for (i = 0; i < periodiccnt; ++i)
1280	{	1528	{
1281	ev_periodic w = (ev_periodic )periodics [i];	1529	ev_periodic w = (ev_periodic )periodics [i];
1282		1530
1283	if (w->reschedule_cb)	1531	if (w->reschedule_cb)
1284	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1532	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1285	else if (w->interval)	1533	else if (w->interval)
1286	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	1534	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1287	}	1535	}
1288		1536
1289	/* now rebuild the heap */	1537	/* now rebuild the heap */
1290	for (i = periodiccnt >> 1; i--; )	1538	for (i = periodiccnt >> 1; i--; )
1291	downheap (periodics, periodiccnt, i);	1539	downheap (periodics, periodiccnt, i);
…		…
1373	{	1621	{
1374	#if EV_PERIODIC_ENABLE	1622	#if EV_PERIODIC_ENABLE
1375	periodics_reschedule (EV_A);	1623	periodics_reschedule (EV_A);
1376	#endif	1624	#endif
1377	/* adjust timers. this is easy, as the offset is the same for all of them */	1625	/* adjust timers. this is easy, as the offset is the same for all of them */
1378	for (i = 0; i < timercnt; ++i)	1626	for (i = 1; i <= timercnt; ++i)
1379	((WT)timers [i])->at += ev_rt_now - mn_now;	1627	ev_at (timers [i]) += ev_rt_now - mn_now;
1380	}	1628	}
1381		1629
1382	mn_now = ev_rt_now;	1630	mn_now = ev_rt_now;
1383	}	1631	}
1384	}	1632	}
…		…
1398	static int loop_done;	1646	static int loop_done;
1399		1647
1400	void	1648	void
1401	ev_loop (EV_P_ int flags)	1649	ev_loop (EV_P_ int flags)
1402	{	1650	{
1403	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)	1651	loop_done = EVUNLOOP_CANCEL;
1404	? EVUNLOOP_ONE
1405	: EVUNLOOP_CANCEL;
1406		1652
1407	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1653	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1408		1654
1409	do	1655	do
1410	{	1656	{
…		…
1444	/* update fd-related kernel structures */	1690	/* update fd-related kernel structures */
1445	fd_reify (EV_A);	1691	fd_reify (EV_A);
1446		1692
1447	/* calculate blocking time */	1693	/* calculate blocking time */
1448	{	1694	{
1449	ev_tstamp block;	1695	ev_tstamp waittime = 0.;
		1696	ev_tstamp sleeptime = 0.;
1450		1697
1451	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))	1698	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1452	block = 0.; /* do not block at all */
1453	else
1454	{	1699	{
1455	/* update time to cancel out callback processing overhead */	1700	/* update time to cancel out callback processing overhead */
1456	time_update (EV_A_ 1e100);	1701	time_update (EV_A_ 1e100);
1457		1702
1458	block = MAX_BLOCKTIME;	1703	waittime = MAX_BLOCKTIME;
1459		1704
1460	if (timercnt)	1705	if (timercnt)
1461	{	1706	{
1462	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1707	ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
1463	if (block > to) block = to;	1708	if (waittime > to) waittime = to;
1464	}	1709	}
1465		1710
1466	#if EV_PERIODIC_ENABLE	1711	#if EV_PERIODIC_ENABLE
1467	if (periodiccnt)	1712	if (periodiccnt)
1468	{	1713	{
1469	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1714	ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
1470	if (block > to) block = to;	1715	if (waittime > to) waittime = to;
1471	}	1716	}
1472	#endif	1717	#endif
1473		1718
1474	if (expect_false (block < 0.)) block = 0.;	1719	if (expect_false (waittime < timeout_blocktime))
		1720	waittime = timeout_blocktime;
		1721
		1722	sleeptime = waittime - backend_fudge;
		1723
		1724	if (expect_true (sleeptime > io_blocktime))
		1725	sleeptime = io_blocktime;
		1726
		1727	if (sleeptime)
		1728	{
		1729	ev_sleep (sleeptime);
		1730	waittime -= sleeptime;
		1731	}
1475	}	1732	}
1476		1733
1477	++loop_count;	1734	++loop_count;
1478	backend_poll (EV_A_ block);	1735	backend_poll (EV_A_ waittime);
1479		1736
1480	/* update ev_rt_now, do magic */	1737	/* update ev_rt_now, do magic */
1481	time_update (EV_A_ block);	1738	time_update (EV_A_ waittime + sleeptime);
1482	}	1739	}
1483		1740
1484	/* queue pending timers and reschedule them */	1741	/* queue pending timers and reschedule them */
1485	timers_reify (EV_A); /* relative timers called last */	1742	timers_reify (EV_A); /* relative timers called last */
1486	#if EV_PERIODIC_ENABLE	1743	#if EV_PERIODIC_ENABLE
…		…
1495	/* queue check watchers, to be executed first */	1752	/* queue check watchers, to be executed first */
1496	if (expect_false (checkcnt))	1753	if (expect_false (checkcnt))
1497	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1754	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1498		1755
1499	call_pending (EV_A);	1756	call_pending (EV_A);
1500
1501	}	1757	}
1502	while (expect_true (activecnt && !loop_done));	1758	while (expect_true (
		1759	activecnt
		1760	&& !loop_done
		1761	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
		1762	));
1503		1763
1504	if (loop_done == EVUNLOOP_ONE)	1764	if (loop_done == EVUNLOOP_ONE)
1505	loop_done = EVUNLOOP_CANCEL;	1765	loop_done = EVUNLOOP_CANCEL;
1506	}	1766	}
1507		1767
…		…
1600		1860
1601	ev_start (EV_A_ (W)w, 1);	1861	ev_start (EV_A_ (W)w, 1);
1602	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1862	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1603	wlist_add (&anfds[fd].head, (WL)w);	1863	wlist_add (&anfds[fd].head, (WL)w);
1604		1864
1605	fd_change (EV_A_ fd, w->events & EV_IOFDSET);	1865	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
1606	w->events &= ~ EV_IOFDSET;	1866	w->events &= ~EV_IOFDSET;
1607	}	1867	}
1608		1868
1609	void noinline	1869	void noinline
1610	ev_io_stop (EV_P_ ev_io *w)	1870	ev_io_stop (EV_P_ ev_io *w)
1611	{	1871	{
…		…
1616	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1876	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1617		1877
1618	wlist_del (&anfds[w->fd].head, (WL)w);	1878	wlist_del (&anfds[w->fd].head, (WL)w);
1619	ev_stop (EV_A_ (W)w);	1879	ev_stop (EV_A_ (W)w);
1620		1880
1621	fd_change (EV_A_ w->fd, 0);	1881	fd_change (EV_A_ w->fd, 1);
1622	}	1882	}
1623		1883
1624	void noinline	1884	void noinline
1625	ev_timer_start (EV_P_ ev_timer *w)	1885	ev_timer_start (EV_P_ ev_timer *w)
1626	{	1886	{
1627	if (expect_false (ev_is_active (w)))	1887	if (expect_false (ev_is_active (w)))
1628	return;	1888	return;
1629		1889
1630	((WT)w)->at += mn_now;	1890	ev_at (w) += mn_now;
1631		1891
1632	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1892	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1633		1893
1634	ev_start (EV_A_ (W)w, ++timercnt);	1894	ev_start (EV_A_ (W)w, ++timercnt);
1635	array_needsize (WT, timers, timermax, timercnt, EMPTY2);	1895	array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
1636	timers [timercnt - 1] = (WT)w;	1896	timers [timercnt] = (WT)w;
1637	upheap (timers, timercnt - 1);	1897	upheap (timers, timercnt);
1638		1898
1639	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/	1899	/assert (("internal timer heap corruption", timers [((W)w)->active] == w));/
1640	}	1900	}
1641		1901
1642	void noinline	1902	void noinline
1643	ev_timer_stop (EV_P_ ev_timer *w)	1903	ev_timer_stop (EV_P_ ev_timer *w)
1644	{	1904	{
1645	clear_pending (EV_A_ (W)w);	1905	clear_pending (EV_A_ (W)w);
1646	if (expect_false (!ev_is_active (w)))	1906	if (expect_false (!ev_is_active (w)))
1647	return;	1907	return;
1648		1908
1649	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));	1909	assert (("internal timer heap corruption", timers [((W)w)->active] == (WT)w));
1650		1910
1651	{	1911	{
1652	int active = ((W)w)->active;	1912	int active = ((W)w)->active;
1653		1913
1654	if (expect_true (--active < --timercnt))	1914	if (expect_true (active < timercnt))
1655	{	1915	{
1656	timers [active] = timers [timercnt];	1916	timers [active] = timers [timercnt];
1657	adjustheap (timers, timercnt, active);	1917	adjustheap (timers, timercnt, active);
1658	}	1918	}
		1919
		1920	--timercnt;
1659	}	1921	}
1660		1922
1661	((WT)w)->at -= mn_now;	1923	ev_at (w) -= mn_now;
1662		1924
1663	ev_stop (EV_A_ (W)w);	1925	ev_stop (EV_A_ (W)w);
1664	}	1926	}
1665		1927
1666	void noinline	1928	void noinline
…		…
1668	{	1930	{
1669	if (ev_is_active (w))	1931	if (ev_is_active (w))
1670	{	1932	{
1671	if (w->repeat)	1933	if (w->repeat)
1672	{	1934	{
1673	((WT)w)->at = mn_now + w->repeat;	1935	ev_at (w) = mn_now + w->repeat;
1674	adjustheap (timers, timercnt, ((W)w)->active - 1);	1936	adjustheap (timers, timercnt, ((W)w)->active);
1675	}	1937	}
1676	else	1938	else
1677	ev_timer_stop (EV_A_ w);	1939	ev_timer_stop (EV_A_ w);
1678	}	1940	}
1679	else if (w->repeat)	1941	else if (w->repeat)
…		…
1689	{	1951	{
1690	if (expect_false (ev_is_active (w)))	1952	if (expect_false (ev_is_active (w)))
1691	return;	1953	return;
1692		1954
1693	if (w->reschedule_cb)	1955	if (w->reschedule_cb)
1694	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1956	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1695	else if (w->interval)	1957	else if (w->interval)
1696	{	1958	{
1697	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1959	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1698	/* this formula differs from the one in periodic_reify because we do not always round up */	1960	/* this formula differs from the one in periodic_reify because we do not always round up */
1699	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	1961	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1700	}	1962	}
1701	else	1963	else
1702	((WT)w)->at = w->offset;	1964	ev_at (w) = w->offset;
1703		1965
1704	ev_start (EV_A_ (W)w, ++periodiccnt);	1966	ev_start (EV_A_ (W)w, ++periodiccnt);
1705	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);	1967	array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
1706	periodics [periodiccnt - 1] = (WT)w;	1968	periodics [periodiccnt] = (WT)w;
1707	upheap (periodics, periodiccnt - 1);	1969	upheap (periodics, periodiccnt);
1708		1970
1709	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/	1971	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/
1710	}	1972	}
1711		1973
1712	void noinline	1974	void noinline
…		…
1714	{	1976	{
1715	clear_pending (EV_A_ (W)w);	1977	clear_pending (EV_A_ (W)w);
1716	if (expect_false (!ev_is_active (w)))	1978	if (expect_false (!ev_is_active (w)))
1717	return;	1979	return;
1718		1980
1719	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));	1981	assert (("internal periodic heap corruption", periodics [((W)w)->active] == (WT)w));
1720		1982
1721	{	1983	{
1722	int active = ((W)w)->active;	1984	int active = ((W)w)->active;
1723		1985
1724	if (expect_true (--active < --periodiccnt))	1986	if (expect_true (active < periodiccnt))
1725	{	1987	{
1726	periodics [active] = periodics [periodiccnt];	1988	periodics [active] = periodics [periodiccnt];
1727	adjustheap (periodics, periodiccnt, active);	1989	adjustheap (periodics, periodiccnt, active);
1728	}	1990	}
		1991
		1992	--periodiccnt;
1729	}	1993	}
1730		1994
1731	ev_stop (EV_A_ (W)w);	1995	ev_stop (EV_A_ (W)w);
1732	}	1996	}
1733		1997
…		…
1752	#endif	2016	#endif
1753	if (expect_false (ev_is_active (w)))	2017	if (expect_false (ev_is_active (w)))
1754	return;	2018	return;
1755		2019
1756	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2020	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2021
		2022	evpipe_init (EV_A);
1757		2023
1758	{	2024	{
1759	#ifndef _WIN32	2025	#ifndef _WIN32
1760	sigset_t full, prev;	2026	sigset_t full, prev;
1761	sigfillset (&full);	2027	sigfillset (&full);
…		…
1773	wlist_add (&signals [w->signum - 1].head, (WL)w);	2039	wlist_add (&signals [w->signum - 1].head, (WL)w);
1774		2040
1775	if (!((WL)w)->next)	2041	if (!((WL)w)->next)
1776	{	2042	{
1777	#if _WIN32	2043	#if _WIN32
1778	signal (w->signum, sighandler);	2044	signal (w->signum, ev_sighandler);
1779	#else	2045	#else
1780	struct sigaction sa;	2046	struct sigaction sa;
1781	sa.sa_handler = sighandler;	2047	sa.sa_handler = ev_sighandler;
1782	sigfillset (&sa.sa_mask);	2048	sigfillset (&sa.sa_mask);
1783	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2049	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1784	sigaction (w->signum, &sa, 0);	2050	sigaction (w->signum, &sa, 0);
1785	#endif	2051	#endif
1786	}	2052	}
…		…
2170		2436
2171	#if EV_EMBED_ENABLE	2437	#if EV_EMBED_ENABLE
2172	void noinline	2438	void noinline
2173	ev_embed_sweep (EV_P_ ev_embed *w)	2439	ev_embed_sweep (EV_P_ ev_embed *w)
2174	{	2440	{
2175	ev_loop (w->loop, EVLOOP_NONBLOCK);	2441	ev_loop (w->other, EVLOOP_NONBLOCK);
2176	}	2442	}
2177		2443
2178	static void	2444	static void
2179	embed_cb (EV_P_ ev_io *io, int revents)	2445	embed_io_cb (EV_P_ ev_io *io, int revents)
2180	{	2446	{
2181	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2447	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
2182		2448
2183	if (ev_cb (w))	2449	if (ev_cb (w))
2184	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2450	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2185	else	2451	else
2186	ev_embed_sweep (loop, w);	2452	ev_loop (w->other, EVLOOP_NONBLOCK);
2187	}	2453	}
		2454
		2455	static void
		2456	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2457	{
		2458	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2459
		2460	{
		2461	struct ev_loop *loop = w->other;
		2462
		2463	while (fdchangecnt)
		2464	{
		2465	fd_reify (EV_A);
		2466	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2467	}
		2468	}
		2469	}
		2470
		2471	#if 0
		2472	static void
		2473	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2474	{
		2475	ev_idle_stop (EV_A_ idle);
		2476	}
		2477	#endif
2188		2478
2189	void	2479	void
2190	ev_embed_start (EV_P_ ev_embed *w)	2480	ev_embed_start (EV_P_ ev_embed *w)
2191	{	2481	{
2192	if (expect_false (ev_is_active (w)))	2482	if (expect_false (ev_is_active (w)))
2193	return;	2483	return;
2194		2484
2195	{	2485	{
2196	struct ev_loop *loop = w->loop;	2486	struct ev_loop *loop = w->other;
2197	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2487	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2198	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2488	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2199	}	2489	}
2200		2490
2201	ev_set_priority (&w->io, ev_priority (w));	2491	ev_set_priority (&w->io, ev_priority (w));
2202	ev_io_start (EV_A_ &w->io);	2492	ev_io_start (EV_A_ &w->io);
2203		2493
		2494	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2495	ev_set_priority (&w->prepare, EV_MINPRI);
		2496	ev_prepare_start (EV_A_ &w->prepare);
		2497
		2498	/ev_idle_init (&w->idle, e,bed_idle_cb);/
		2499
2204	ev_start (EV_A_ (W)w, 1);	2500	ev_start (EV_A_ (W)w, 1);
2205	}	2501	}
2206		2502
2207	void	2503	void
2208	ev_embed_stop (EV_P_ ev_embed *w)	2504	ev_embed_stop (EV_P_ ev_embed *w)
…		…
2210	clear_pending (EV_A_ (W)w);	2506	clear_pending (EV_A_ (W)w);
2211	if (expect_false (!ev_is_active (w)))	2507	if (expect_false (!ev_is_active (w)))
2212	return;	2508	return;
2213		2509
2214	ev_io_stop (EV_A_ &w->io);	2510	ev_io_stop (EV_A_ &w->io);
		2511	ev_prepare_stop (EV_A_ &w->prepare);
2215		2512
2216	ev_stop (EV_A_ (W)w);	2513	ev_stop (EV_A_ (W)w);
2217	}	2514	}
2218	#endif	2515	#endif
2219		2516
…		…
2244		2541
2245	ev_stop (EV_A_ (W)w);	2542	ev_stop (EV_A_ (W)w);
2246	}	2543	}
2247	#endif	2544	#endif
2248		2545
		2546	#if EV_ASYNC_ENABLE
		2547	void
		2548	ev_async_start (EV_P_ ev_async *w)
		2549	{
		2550	if (expect_false (ev_is_active (w)))
		2551	return;
		2552
		2553	evpipe_init (EV_A);
		2554
		2555	ev_start (EV_A_ (W)w, ++asynccnt);
		2556	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2557	asyncs [asynccnt - 1] = w;
		2558	}
		2559
		2560	void
		2561	ev_async_stop (EV_P_ ev_async *w)
		2562	{
		2563	clear_pending (EV_A_ (W)w);
		2564	if (expect_false (!ev_is_active (w)))
		2565	return;
		2566
		2567	{
		2568	int active = ((W)w)->active;
		2569	asyncs [active - 1] = asyncs [--asynccnt];
		2570	((W)asyncs [active - 1])->active = active;
		2571	}
		2572
		2573	ev_stop (EV_A_ (W)w);
		2574	}
		2575
		2576	void
		2577	ev_async_send (EV_P_ ev_async *w)
		2578	{
		2579	w->sent = 1;
		2580	evpipe_write (EV_A_ &gotasync);
		2581	}
		2582	#endif
		2583
2249	/*****************************************************************************/	2584	/*****************************************************************************/
2250		2585
2251	struct ev_once	2586	struct ev_once
2252	{	2587	{
2253	ev_io io;	2588	ev_io io;
…		…
2308	ev_timer_set (&once->to, timeout, 0.);	2643	ev_timer_set (&once->to, timeout, 0.);
2309	ev_timer_start (EV_A_ &once->to);	2644	ev_timer_start (EV_A_ &once->to);
2310	}	2645	}
2311	}	2646	}
2312		2647
		2648	#if EV_MULTIPLICITY
		2649	#include "ev_wrap.h"
		2650	#endif
		2651
2313	#ifdef __cplusplus	2652	#ifdef __cplusplus
2314	}	2653	}
2315	#endif	2654	#endif
2316		2655

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Comparing libev/ev.c (file contents): Revision 1.183 by root, Wed Dec 12 05:11:56 2007 UTC vs. Revision 1.228 by root, Fri May 2 08:07:37 2008 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.183 by root, Wed Dec 12 05:11:56 2007 UTC vs.
Revision 1.228 by root, Fri May 2 08:07:37 2008 UTC