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

Comparing libev/ev.c (file contents):
Revision 1.173 by root, Sun Dec 9 19:42:57 2007 UTC vs.
Revision 1.219 by root, Wed Apr 2 10:55:39 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
51	# ifndef EV_USE_MONOTONIC	59	# ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 0	60	# define EV_USE_MONOTONIC 0
53	# endif	61	# endif
54	# ifndef EV_USE_REALTIME	62	# ifndef EV_USE_REALTIME
55	# define EV_USE_REALTIME 0	63	# define EV_USE_REALTIME 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_NANOSLEEP
		68	# if HAVE_NANOSLEEP
		69	# define EV_USE_NANOSLEEP 1
		70	# else
		71	# define EV_USE_NANOSLEEP 0
56	# endif	72	# endif
57	# endif	73	# endif
58		74
59	# ifndef EV_USE_SELECT	75	# ifndef EV_USE_SELECT
60	# if HAVE_SELECT && HAVE_SYS_SELECT_H	76	# if HAVE_SELECT && HAVE_SYS_SELECT_H
…		…
146		162
147	#ifndef EV_USE_REALTIME	163	#ifndef EV_USE_REALTIME
148	# define EV_USE_REALTIME 0	164	# define EV_USE_REALTIME 0
149	#endif	165	#endif
150		166
		167	#ifndef EV_USE_NANOSLEEP
		168	# define EV_USE_NANOSLEEP 0
		169	#endif
		170
151	#ifndef EV_USE_SELECT	171	#ifndef EV_USE_SELECT
152	# define EV_USE_SELECT 1	172	# define EV_USE_SELECT 1
153	#endif	173	#endif
154		174
155	#ifndef EV_USE_POLL	175	#ifndef EV_USE_POLL
…		…
202	#ifndef CLOCK_REALTIME	222	#ifndef CLOCK_REALTIME
203	# undef EV_USE_REALTIME	223	# undef EV_USE_REALTIME
204	# define EV_USE_REALTIME 0	224	# define EV_USE_REALTIME 0
205	#endif	225	#endif
206		226
		227	#if !EV_STAT_ENABLE
		228	# undef EV_USE_INOTIFY
		229	# define EV_USE_INOTIFY 0
		230	#endif
		231
		232	#if !EV_USE_NANOSLEEP
		233	# ifndef _WIN32
		234	# include <sys/select.h>
		235	# endif
		236	#endif
		237
		238	#if EV_USE_INOTIFY
		239	# include <sys/inotify.h>
		240	#endif
		241
207	#if EV_SELECT_IS_WINSOCKET	242	#if EV_SELECT_IS_WINSOCKET
208	# include <winsock.h>	243	# include <winsock.h>
209	#endif	244	#endif
210		245
211	#if !EV_STAT_ENABLE
212	# define EV_USE_INOTIFY 0
213	#endif
214
215	#if EV_USE_INOTIFY
216	# include <sys/inotify.h>
217	#endif
218
219	/**/	246	/**/
		247
		248	/*
		249	* This is used to avoid floating point rounding problems.
		250	* It is added to ev_rt_now when scheduling periodics
		251	* to ensure progress, time-wise, even when rounding
		252	* errors are against us.
		253	* This value is good at least till the year 4000.
		254	* Better solutions welcome.
		255	*/
		256	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
220		257
221	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	258	#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) */	259	#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 */	260	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
224		261
225	#if __GNUC__ >= 3	262	#if __GNUC__ >= 4
226	# define expect(expr,value) __builtin_expect ((expr),(value))	263	# define expect(expr,value) __builtin_expect ((expr),(value))
227	# define noinline __attribute__ ((noinline))	264	# define noinline __attribute__ ((noinline))
228	#else	265	#else
229	# define expect(expr,value) (expr)	266	# define expect(expr,value) (expr)
230	# define noinline	267	# define noinline
…		…
251		288
252	typedef ev_watcher *W;	289	typedef ev_watcher *W;
253	typedef ev_watcher_list *WL;	290	typedef ev_watcher_list *WL;
254	typedef ev_watcher_time *WT;	291	typedef ev_watcher_time *WT;
255		292
		293	#if EV_USE_MONOTONIC
		294	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		295	/* giving it a reasonably high chance of working on typical architetcures */
256	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	296	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		297	#endif
257		298
258	#ifdef _WIN32	299	#ifdef _WIN32
259	# include "ev_win32.c"	300	# include "ev_win32.c"
260	#endif	301	#endif
261		302
…		…
397	{	438	{
398	return ev_rt_now;	439	return ev_rt_now;
399	}	440	}
400	#endif	441	#endif
401		442
		443	void
		444	ev_sleep (ev_tstamp delay)
		445	{
		446	if (delay > 0.)
		447	{
		448	#if EV_USE_NANOSLEEP
		449	struct timespec ts;
		450
		451	ts.tv_sec = (time_t)delay;
		452	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		453
		454	nanosleep (&ts, 0);
		455	#elif defined(_WIN32)
		456	Sleep ((unsigned long)(delay * 1e3));
		457	#else
		458	struct timeval tv;
		459
		460	tv.tv_sec = (time_t)delay;
		461	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		462
		463	select (0, 0, 0, 0, &tv);
		464	#endif
		465	}
		466	}
		467
		468	/*****************************************************************************/
		469
402	int inline_size	470	int inline_size
403	array_nextsize (int elem, int cur, int cnt)	471	array_nextsize (int elem, int cur, int cnt)
404	{	472	{
405	int ncur = cur + 1;	473	int ncur = cur + 1;
406		474
…		…
466	pendings [pri][w_->pending - 1].w = w_;	534	pendings [pri][w_->pending - 1].w = w_;
467	pendings [pri][w_->pending - 1].events = revents;	535	pendings [pri][w_->pending - 1].events = revents;
468	}	536	}
469	}	537	}
470		538
471	void inline_size	539	void inline_speed
472	queue_events (EV_P_ W *events, int eventcnt, int type)	540	queue_events (EV_P_ W *events, int eventcnt, int type)
473	{	541	{
474	int i;	542	int i;
475		543
476	for (i = 0; i < eventcnt; ++i)	544	for (i = 0; i < eventcnt; ++i)
…		…
523	{	591	{
524	int fd = fdchanges [i];	592	int fd = fdchanges [i];
525	ANFD *anfd = anfds + fd;	593	ANFD *anfd = anfds + fd;
526	ev_io *w;	594	ev_io *w;
527		595
528	int events = 0;	596	unsigned char events = 0;
529		597
530	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	598	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
531	events \|= w->events;	599	events \|= (unsigned char)w->events;
532		600
533	#if EV_SELECT_IS_WINSOCKET	601	#if EV_SELECT_IS_WINSOCKET
534	if (events)	602	if (events)
535	{	603	{
536	unsigned long argp;	604	unsigned long argp;
		605	#ifdef EV_FD_TO_WIN32_HANDLE
		606	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		607	#else
537	anfd->handle = _get_osfhandle (fd);	608	anfd->handle = _get_osfhandle (fd);
		609	#endif
538	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	610	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
539	}	611	}
540	#endif	612	#endif
541		613
		614	{
		615	unsigned char o_events = anfd->events;
		616	unsigned char o_reify = anfd->reify;
		617
542	anfd->reify = 0;	618	anfd->reify = 0;
543
544	backend_modify (EV_A_ fd, anfd->events, events);
545	anfd->events = events;	619	anfd->events = events;
		620
		621	if (o_events != events \|\| o_reify & EV_IOFDSET)
		622	backend_modify (EV_A_ fd, o_events, events);
		623	}
546	}	624	}
547		625
548	fdchangecnt = 0;	626	fdchangecnt = 0;
549	}	627	}
550		628
551	void inline_size	629	void inline_size
552	fd_change (EV_P_ int fd)	630	fd_change (EV_P_ int fd, int flags)
553	{	631	{
554	if (expect_false (anfds [fd].reify))	632	unsigned char reify = anfds [fd].reify;
555	return;
556
557	anfds [fd].reify = 1;	633	anfds [fd].reify \|= flags;
558		634
		635	if (expect_true (!reify))
		636	{
559	++fdchangecnt;	637	++fdchangecnt;
560	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
561	fdchanges [fdchangecnt - 1] = fd;	639	fdchanges [fdchangecnt - 1] = fd;
		640	}
562	}	641	}
563		642
564	void inline_speed	643	void inline_speed
565	fd_kill (EV_P_ int fd)	644	fd_kill (EV_P_ int fd)
566	{	645	{
…		…
617		696
618	for (fd = 0; fd < anfdmax; ++fd)	697	for (fd = 0; fd < anfdmax; ++fd)
619	if (anfds [fd].events)	698	if (anfds [fd].events)
620	{	699	{
621	anfds [fd].events = 0;	700	anfds [fd].events = 0;
622	fd_change (EV_A_ fd);	701	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
623	}	702	}
624	}	703	}
625		704
626	/*****************************************************************************/	705	/*****************************************************************************/
627		706
628	void inline_speed	707	void inline_speed
629	upheap (WT *heap, int k)	708	upheap (WT *heap, int k)
630	{	709	{
631	WT w = heap [k];	710	WT w = heap [k];
632		711
633	while (k && heap [k >> 1]->at > w->at)	712	while (k)
634	{	713	{
		714	int p = (k - 1) >> 1;
		715
		716	if (heap [p]->at <= w->at)
		717	break;
		718
635	heap [k] = heap [k >> 1];	719	heap [k] = heap [p];
636	((W)heap [k])->active = k + 1;	720	((W)heap [k])->active = k + 1;
637	k >>= 1;	721	k = p;
638	}	722	}
639		723
640	heap [k] = w;	724	heap [k] = w;
641	((W)heap [k])->active = k + 1;	725	((W)heap [k])->active = k + 1;
642
643	}	726	}
644		727
645	void inline_speed	728	void inline_speed
646	downheap (WT *heap, int N, int k)	729	downheap (WT *heap, int N, int k)
647	{	730	{
648	WT w = heap [k];	731	WT w = heap [k];
649		732
650	while (k < (N >> 1))	733	for (;;)
651	{	734	{
652	int j = k << 1;	735	int c = (k << 1) + 1;
653		736
654	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	737	if (c >= N)
655	++j;
656
657	if (w->at <= heap [j]->at)
658	break;	738	break;
659		739
		740	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		741	? 1 : 0;
		742
		743	if (w->at <= heap [c]->at)
		744	break;
		745
660	heap [k] = heap [j];	746	heap [k] = heap [c];
661	((W)heap [k])->active = k + 1;	747	((W)heap [k])->active = k + 1;
		748
662	k = j;	749	k = c;
663	}	750	}
664		751
665	heap [k] = w;	752	heap [k] = w;
666	((W)heap [k])->active = k + 1;	753	((W)heap [k])->active = k + 1;
667	}	754	}
…		…
676	/*****************************************************************************/	763	/*****************************************************************************/
677		764
678	typedef struct	765	typedef struct
679	{	766	{
680	WL head;	767	WL head;
681	sig_atomic_t volatile gotsig;	768	EV_ATOMIC_T gotsig;
682	} ANSIG;	769	} ANSIG;
683		770
684	static ANSIG *signals;	771	static ANSIG *signals;
685	static int signalmax;	772	static int signalmax;
686		773
687	static int sigpipe [2];	774	static EV_ATOMIC_T gotsig;
688	static sig_atomic_t volatile gotsig;
689	static ev_io sigev;
690		775
691	void inline_size	776	void inline_size
692	signals_init (ANSIG *base, int count)	777	signals_init (ANSIG *base, int count)
693	{	778	{
694	while (count--)	779	while (count--)
…		…
698		783
699	++base;	784	++base;
700	}	785	}
701	}	786	}
702		787
703	static void	788	/*****************************************************************************/
704	sighandler (int signum)
705	{
706	#if _WIN32
707	signal (signum, sighandler);
708	#endif
709
710	signals [signum - 1].gotsig = 1;
711
712	if (!gotsig)
713	{
714	int old_errno = errno;
715	gotsig = 1;
716	write (sigpipe [1], &signum, 1);
717	errno = old_errno;
718	}
719	}
720
721	void noinline
722	ev_feed_signal_event (EV_P_ int signum)
723	{
724	WL w;
725
726	#if EV_MULTIPLICITY
727	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
728	#endif
729
730	--signum;
731
732	if (signum < 0 \|\| signum >= signalmax)
733	return;
734
735	signals [signum].gotsig = 0;
736
737	for (w = signals [signum].head; w; w = w->next)
738	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
739	}
740
741	static void
742	sigcb (EV_P_ ev_io *iow, int revents)
743	{
744	int signum;
745
746	read (sigpipe [0], &revents, 1);
747	gotsig = 0;
748
749	for (signum = signalmax; signum--; )
750	if (signals [signum].gotsig)
751	ev_feed_signal_event (EV_A_ signum + 1);
752	}
753		789
754	void inline_speed	790	void inline_speed
755	fd_intern (int fd)	791	fd_intern (int fd)
756	{	792	{
757	#ifdef _WIN32	793	#ifdef _WIN32
…		…
762	fcntl (fd, F_SETFL, O_NONBLOCK);	798	fcntl (fd, F_SETFL, O_NONBLOCK);
763	#endif	799	#endif
764	}	800	}
765		801
766	static void noinline	802	static void noinline
767	siginit (EV_P)	803	evpipe_init (EV_P)
768	{	804	{
		805	if (!ev_is_active (&pipeev))
		806	{
		807	while (pipe (evpipe))
		808	syserr ("(libev) error creating signal/async pipe");
		809
769	fd_intern (sigpipe [0]);	810	fd_intern (evpipe [0]);
770	fd_intern (sigpipe [1]);	811	fd_intern (evpipe [1]);
771		812
772	ev_io_set (&sigev, sigpipe [0], EV_READ);	813	ev_io_set (&pipeev, evpipe [0], EV_READ);
773	ev_io_start (EV_A_ &sigev);	814	ev_io_start (EV_A_ &pipeev);
774	ev_unref (EV_A); /* child watcher should not keep loop alive */	815	ev_unref (EV_A); /* watcher should not keep loop alive */
		816	}
		817	}
		818
		819	void inline_size
		820	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		821	{
		822	if (!*flag)
		823	{
		824	int old_errno = errno; /* save errno because write might clobber it */
		825
		826	*flag = 1;
		827	write (evpipe [1], &old_errno, 1);
		828
		829	errno = old_errno;
		830	}
		831	}
		832
		833	static void
		834	pipecb (EV_P_ ev_io *iow, int revents)
		835	{
		836	{
		837	int dummy;
		838	read (evpipe [0], &dummy, 1);
		839	}
		840
		841	if (gotsig && ev_is_default_loop (EV_A))
		842	{
		843	int signum;
		844	gotsig = 0;
		845
		846	for (signum = signalmax; signum--; )
		847	if (signals [signum].gotsig)
		848	ev_feed_signal_event (EV_A_ signum + 1);
		849	}
		850
		851	#if EV_ASYNC_ENABLE
		852	if (gotasync)
		853	{
		854	int i;
		855	gotasync = 0;
		856
		857	for (i = asynccnt; i--; )
		858	if (asyncs [i]->sent)
		859	{
		860	asyncs [i]->sent = 0;
		861	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		862	}
		863	}
		864	#endif
775	}	865	}
776		866
777	/*****************************************************************************/	867	/*****************************************************************************/
778		868
		869	static void
		870	ev_sighandler (int signum)
		871	{
		872	#if EV_MULTIPLICITY
		873	struct ev_loop *loop = &default_loop_struct;
		874	#endif
		875
		876	#if _WIN32
		877	signal (signum, ev_sighandler);
		878	#endif
		879
		880	signals [signum - 1].gotsig = 1;
		881	evpipe_write (EV_A_ &gotsig);
		882	}
		883
		884	void noinline
		885	ev_feed_signal_event (EV_P_ int signum)
		886	{
		887	WL w;
		888
		889	#if EV_MULTIPLICITY
		890	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		891	#endif
		892
		893	--signum;
		894
		895	if (signum < 0 \|\| signum >= signalmax)
		896	return;
		897
		898	signals [signum].gotsig = 0;
		899
		900	for (w = signals [signum].head; w; w = w->next)
		901	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		902	}
		903
		904	/*****************************************************************************/
		905
779	static ev_child *childs [EV_PID_HASHSIZE];	906	static WL childs [EV_PID_HASHSIZE];
780		907
781	#ifndef _WIN32	908	#ifndef _WIN32
782		909
783	static ev_signal childev;	910	static ev_signal childev;
784		911
		912	#ifndef WIFCONTINUED
		913	# define WIFCONTINUED(status) 0
		914	#endif
		915
785	void inline_speed	916	void inline_speed
786	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	917	child_reap (EV_P_ int chain, int pid, int status)
787	{	918	{
788	ev_child *w;	919	ev_child *w;
		920	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
789		921
790	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	922	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		923	{
791	if (w->pid == pid \|\| !w->pid)	924	if ((w->pid == pid \|\| !w->pid)
		925	&& (!traced \|\| (w->flags & 1)))
792	{	926	{
793	ev_set_priority (w, ev_priority (sw)); /* need to do it now */	927	ev_set_priority (w, EV_MAXPRI); /* need to do it now, this must be the same prio as the signal watcher itself */
794	w->rpid = pid;	928	w->rpid = pid;
795	w->rstatus = status;	929	w->rstatus = status;
796	ev_feed_event (EV_A_ (W)w, EV_CHILD);	930	ev_feed_event (EV_A_ (W)w, EV_CHILD);
797	}	931	}
		932	}
798	}	933	}
799		934
800	#ifndef WCONTINUED	935	#ifndef WCONTINUED
801	# define WCONTINUED 0	936	# define WCONTINUED 0
802	#endif	937	#endif
…		…
811	if (!WCONTINUED	946	if (!WCONTINUED
812	\|\| errno != EINVAL	947	\|\| errno != EINVAL
813	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))	948	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
814	return;	949	return;
815		950
816	/* make sure we are called again until all childs have been reaped */	951	/* make sure we are called again until all children have been reaped */
817	/* we need to do it this way so that the callback gets called before we continue */	952	/* we need to do it this way so that the callback gets called before we continue */
818	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	953	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
819		954
820	child_reap (EV_A_ sw, pid, pid, status);	955	child_reap (EV_A_ pid, pid, status);
821	if (EV_PID_HASHSIZE > 1)	956	if (EV_PID_HASHSIZE > 1)
822	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	957	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
823	}	958	}
824		959
825	#endif	960	#endif
826		961
827	/*****************************************************************************/	962	/*****************************************************************************/
…		…
899	}	1034	}
900		1035
901	unsigned int	1036	unsigned int
902	ev_embeddable_backends (void)	1037	ev_embeddable_backends (void)
903	{	1038	{
904	return EVBACKEND_EPOLL	1039	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
905	\| EVBACKEND_KQUEUE	1040
906	\| EVBACKEND_PORT;	1041	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1042	/* please fix it and tell me how to detect the fix */
		1043	flags &= ~EVBACKEND_EPOLL;
		1044
		1045	return flags;
907	}	1046	}
908		1047
909	unsigned int	1048	unsigned int
910	ev_backend (EV_P)	1049	ev_backend (EV_P)
911	{	1050	{
…		…
914		1053
915	unsigned int	1054	unsigned int
916	ev_loop_count (EV_P)	1055	ev_loop_count (EV_P)
917	{	1056	{
918	return loop_count;	1057	return loop_count;
		1058	}
		1059
		1060	void
		1061	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1062	{
		1063	io_blocktime = interval;
		1064	}
		1065
		1066	void
		1067	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1068	{
		1069	timeout_blocktime = interval;
919	}	1070	}
920		1071
921	static void noinline	1072	static void noinline
922	loop_init (EV_P_ unsigned int flags)	1073	loop_init (EV_P_ unsigned int flags)
923	{	1074	{
…		…
929	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1080	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
930	have_monotonic = 1;	1081	have_monotonic = 1;
931	}	1082	}
932	#endif	1083	#endif
933		1084
934	ev_rt_now = ev_time ();	1085	ev_rt_now = ev_time ();
935	mn_now = get_clock ();	1086	mn_now = get_clock ();
936	now_floor = mn_now;	1087	now_floor = mn_now;
937	rtmn_diff = ev_rt_now - mn_now;	1088	rtmn_diff = ev_rt_now - mn_now;
		1089
		1090	io_blocktime = 0.;
		1091	timeout_blocktime = 0.;
		1092	backend = 0;
		1093	backend_fd = -1;
		1094	gotasync = 0;
		1095	#if EV_USE_INOTIFY
		1096	fs_fd = -2;
		1097	#endif
938		1098
939	/* pid check not overridable via env */	1099	/* pid check not overridable via env */
940	#ifndef _WIN32	1100	#ifndef _WIN32
941	if (flags & EVFLAG_FORKCHECK)	1101	if (flags & EVFLAG_FORKCHECK)
942	curpid = getpid ();	1102	curpid = getpid ();
…		…
948	flags = atoi (getenv ("LIBEV_FLAGS"));	1108	flags = atoi (getenv ("LIBEV_FLAGS"));
949		1109
950	if (!(flags & 0x0000ffffUL))	1110	if (!(flags & 0x0000ffffUL))
951	flags \|= ev_recommended_backends ();	1111	flags \|= ev_recommended_backends ();
952		1112
953	backend = 0;
954	backend_fd = -1;
955	#if EV_USE_INOTIFY
956	fs_fd = -2;
957	#endif
958
959	#if EV_USE_PORT	1113	#if EV_USE_PORT
960	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1114	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
961	#endif	1115	#endif
962	#if EV_USE_KQUEUE	1116	#if EV_USE_KQUEUE
963	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1117	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
970	#endif	1124	#endif
971	#if EV_USE_SELECT	1125	#if EV_USE_SELECT
972	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1126	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
973	#endif	1127	#endif
974		1128
975	ev_init (&sigev, sigcb);	1129	ev_init (&pipeev, pipecb);
976	ev_set_priority (&sigev, EV_MAXPRI);	1130	ev_set_priority (&pipeev, EV_MAXPRI);
977	}	1131	}
978	}	1132	}
979		1133
980	static void noinline	1134	static void noinline
981	loop_destroy (EV_P)	1135	loop_destroy (EV_P)
982	{	1136	{
983	int i;	1137	int i;
		1138
		1139	if (ev_is_active (&pipeev))
		1140	{
		1141	ev_ref (EV_A); /* signal watcher */
		1142	ev_io_stop (EV_A_ &pipeev);
		1143
		1144	close (evpipe [0]); evpipe [0] = 0;
		1145	close (evpipe [1]); evpipe [1] = 0;
		1146	}
984		1147
985	#if EV_USE_INOTIFY	1148	#if EV_USE_INOTIFY
986	if (fs_fd >= 0)	1149	if (fs_fd >= 0)
987	close (fs_fd);	1150	close (fs_fd);
988	#endif	1151	#endif
…		…
1011	array_free (pending, [i]);	1174	array_free (pending, [i]);
1012	#if EV_IDLE_ENABLE	1175	#if EV_IDLE_ENABLE
1013	array_free (idle, [i]);	1176	array_free (idle, [i]);
1014	#endif	1177	#endif
1015	}	1178	}
		1179
		1180	ev_free (anfds); anfdmax = 0;
1016		1181
1017	/* have to use the microsoft-never-gets-it-right macro */	1182	/* have to use the microsoft-never-gets-it-right macro */
1018	array_free (fdchange, EMPTY);	1183	array_free (fdchange, EMPTY);
1019	array_free (timer, EMPTY);	1184	array_free (timer, EMPTY);
1020	#if EV_PERIODIC_ENABLE	1185	#if EV_PERIODIC_ENABLE
1021	array_free (periodic, EMPTY);	1186	array_free (periodic, EMPTY);
1022	#endif	1187	#endif
		1188	#if EV_FORK_ENABLE
		1189	array_free (fork, EMPTY);
		1190	#endif
1023	array_free (prepare, EMPTY);	1191	array_free (prepare, EMPTY);
1024	array_free (check, EMPTY);	1192	array_free (check, EMPTY);
		1193	#if EV_ASYNC_ENABLE
		1194	array_free (async, EMPTY);
		1195	#endif
1025		1196
1026	backend = 0;	1197	backend = 0;
1027	}	1198	}
1028		1199
1029	void inline_size infy_fork (EV_P);	1200	void inline_size infy_fork (EV_P);
…		…
1042	#endif	1213	#endif
1043	#if EV_USE_INOTIFY	1214	#if EV_USE_INOTIFY
1044	infy_fork (EV_A);	1215	infy_fork (EV_A);
1045	#endif	1216	#endif
1046		1217
1047	if (ev_is_active (&sigev))	1218	if (ev_is_active (&pipeev))
1048	{	1219	{
1049	/* default loop */	1220	/* this "locks" the handlers against writing to the pipe */
		1221	/* while we modify the fd vars */
		1222	gotsig = 1;
		1223	#if EV_ASYNC_ENABLE
		1224	gotasync = 1;
		1225	#endif
1050		1226
1051	ev_ref (EV_A);	1227	ev_ref (EV_A);
1052	ev_io_stop (EV_A_ &sigev);	1228	ev_io_stop (EV_A_ &pipeev);
1053	close (sigpipe [0]);	1229	close (evpipe [0]);
1054	close (sigpipe [1]);	1230	close (evpipe [1]);
1055		1231
1056	while (pipe (sigpipe))
1057	syserr ("(libev) error creating pipe");
1058
1059	siginit (EV_A);	1232	evpipe_init (EV_A);
		1233	/* now iterate over everything, in case we missed something */
		1234	pipecb (EV_A_ &pipeev, EV_READ);
1060	}	1235	}
1061		1236
1062	postfork = 0;	1237	postfork = 0;
1063	}	1238	}
1064		1239
…		…
1086	}	1261	}
1087		1262
1088	void	1263	void
1089	ev_loop_fork (EV_P)	1264	ev_loop_fork (EV_P)
1090	{	1265	{
1091	postfork = 1;	1266	postfork = 1; /* must be in line with ev_default_fork */
1092	}	1267	}
1093		1268
1094	#endif	1269	#endif
1095		1270
1096	#if EV_MULTIPLICITY	1271	#if EV_MULTIPLICITY
…		…
1099	#else	1274	#else
1100	int	1275	int
1101	ev_default_loop (unsigned int flags)	1276	ev_default_loop (unsigned int flags)
1102	#endif	1277	#endif
1103	{	1278	{
1104	if (sigpipe [0] == sigpipe [1])
1105	if (pipe (sigpipe))
1106	return 0;
1107
1108	if (!ev_default_loop_ptr)	1279	if (!ev_default_loop_ptr)
1109	{	1280	{
1110	#if EV_MULTIPLICITY	1281	#if EV_MULTIPLICITY
1111	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1282	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1112	#else	1283	#else
…		…
1115		1286
1116	loop_init (EV_A_ flags);	1287	loop_init (EV_A_ flags);
1117		1288
1118	if (ev_backend (EV_A))	1289	if (ev_backend (EV_A))
1119	{	1290	{
1120	siginit (EV_A);
1121
1122	#ifndef _WIN32	1291	#ifndef _WIN32
1123	ev_signal_init (&childev, childcb, SIGCHLD);	1292	ev_signal_init (&childev, childcb, SIGCHLD);
1124	ev_set_priority (&childev, EV_MAXPRI);	1293	ev_set_priority (&childev, EV_MAXPRI);
1125	ev_signal_start (EV_A_ &childev);	1294	ev_signal_start (EV_A_ &childev);
1126	ev_unref (EV_A); /* child watcher should not keep loop alive */	1295	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1143	#ifndef _WIN32	1312	#ifndef _WIN32
1144	ev_ref (EV_A); /* child watcher */	1313	ev_ref (EV_A); /* child watcher */
1145	ev_signal_stop (EV_A_ &childev);	1314	ev_signal_stop (EV_A_ &childev);
1146	#endif	1315	#endif
1147		1316
1148	ev_ref (EV_A); /* signal watcher */
1149	ev_io_stop (EV_A_ &sigev);
1150
1151	close (sigpipe [0]); sigpipe [0] = 0;
1152	close (sigpipe [1]); sigpipe [1] = 0;
1153
1154	loop_destroy (EV_A);	1317	loop_destroy (EV_A);
1155	}	1318	}
1156		1319
1157	void	1320	void
1158	ev_default_fork (void)	1321	ev_default_fork (void)
…		…
1160	#if EV_MULTIPLICITY	1323	#if EV_MULTIPLICITY
1161	struct ev_loop *loop = ev_default_loop_ptr;	1324	struct ev_loop *loop = ev_default_loop_ptr;
1162	#endif	1325	#endif
1163		1326
1164	if (backend)	1327	if (backend)
1165	postfork = 1;	1328	postfork = 1; /* must be in line with ev_loop_fork */
1166	}	1329	}
1167		1330
1168	/*****************************************************************************/	1331	/*****************************************************************************/
1169		1332
1170	void	1333	void
…		…
1196	void inline_size	1359	void inline_size
1197	timers_reify (EV_P)	1360	timers_reify (EV_P)
1198	{	1361	{
1199	while (timercnt && ((WT)timers [0])->at <= mn_now)	1362	while (timercnt && ((WT)timers [0])->at <= mn_now)
1200	{	1363	{
1201	ev_timer *w = timers [0];	1364	ev_timer w = (ev_timer )timers [0];
1202		1365
1203	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/	1366	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
1204		1367
1205	/* first reschedule or stop timer */	1368	/* first reschedule or stop timer */
1206	if (w->repeat)	1369	if (w->repeat)
…		…
1209		1372
1210	((WT)w)->at += w->repeat;	1373	((WT)w)->at += w->repeat;
1211	if (((WT)w)->at < mn_now)	1374	if (((WT)w)->at < mn_now)
1212	((WT)w)->at = mn_now;	1375	((WT)w)->at = mn_now;
1213		1376
1214	downheap ((WT *)timers, timercnt, 0);	1377	downheap (timers, timercnt, 0);
1215	}	1378	}
1216	else	1379	else
1217	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1380	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1218		1381
1219	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1382	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
…		…
1224	void inline_size	1387	void inline_size
1225	periodics_reify (EV_P)	1388	periodics_reify (EV_P)
1226	{	1389	{
1227	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1390	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1228	{	1391	{
1229	ev_periodic *w = periodics [0];	1392	ev_periodic w = (ev_periodic )periodics [0];
1230		1393
1231	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/	1394	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
1232		1395
1233	/* first reschedule or stop timer */	1396	/* first reschedule or stop timer */
1234	if (w->reschedule_cb)	1397	if (w->reschedule_cb)
1235	{	1398	{
1236	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1399	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1237	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1400	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1238	downheap ((WT *)periodics, periodiccnt, 0);	1401	downheap (periodics, periodiccnt, 0);
1239	}	1402	}
1240	else if (w->interval)	1403	else if (w->interval)
1241	{	1404	{
1242	((WT)w)->at = w->offset + floor ((ev_rt_now - w->offset) / w->interval + 1.) * w->interval;	1405	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1406	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1243	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1407	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1244	downheap ((WT *)periodics, periodiccnt, 0);	1408	downheap (periodics, periodiccnt, 0);
1245	}	1409	}
1246	else	1410	else
1247	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1411	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1248		1412
1249	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1413	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
…		…
1256	int i;	1420	int i;
1257		1421
1258	/* adjust periodics after time jump */	1422	/* adjust periodics after time jump */
1259	for (i = 0; i < periodiccnt; ++i)	1423	for (i = 0; i < periodiccnt; ++i)
1260	{	1424	{
1261	ev_periodic *w = periodics [i];	1425	ev_periodic w = (ev_periodic )periodics [i];
1262		1426
1263	if (w->reschedule_cb)	1427	if (w->reschedule_cb)
1264	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1428	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1265	else if (w->interval)	1429	else if (w->interval)
1266	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	1430	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1267	}	1431	}
1268		1432
1269	/* now rebuild the heap */	1433	/* now rebuild the heap */
1270	for (i = periodiccnt >> 1; i--; )	1434	for (i = periodiccnt >> 1; i--; )
1271	downheap ((WT *)periodics, periodiccnt, i);	1435	downheap (periodics, periodiccnt, i);
1272	}	1436	}
1273	#endif	1437	#endif
1274		1438
1275	#if EV_IDLE_ENABLE	1439	#if EV_IDLE_ENABLE
1276	void inline_size	1440	void inline_size
…		…
1293	}	1457	}
1294	}	1458	}
1295	}	1459	}
1296	#endif	1460	#endif
1297		1461
1298	int inline_size	1462	void inline_speed
1299	time_update_monotonic (EV_P)	1463	time_update (EV_P_ ev_tstamp max_block)
1300	{	1464	{
		1465	int i;
		1466
		1467	#if EV_USE_MONOTONIC
		1468	if (expect_true (have_monotonic))
		1469	{
		1470	ev_tstamp odiff = rtmn_diff;
		1471
1301	mn_now = get_clock ();	1472	mn_now = get_clock ();
1302		1473
		1474	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		1475	/* interpolate in the meantime */
1303	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1476	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1304	{	1477	{
1305	ev_rt_now = rtmn_diff + mn_now;	1478	ev_rt_now = rtmn_diff + mn_now;
1306	return 0;	1479	return;
1307	}	1480	}
1308	else	1481
1309	{
1310	now_floor = mn_now;	1482	now_floor = mn_now;
1311	ev_rt_now = ev_time ();	1483	ev_rt_now = ev_time ();
1312	return 1;
1313	}
1314	}
1315		1484
1316	void inline_size	1485	/* loop a few times, before making important decisions.
1317	time_update (EV_P)	1486	* on the choice of "4": one iteration isn't enough,
1318	{	1487	* in case we get preempted during the calls to
1319	int i;	1488	* ev_time and get_clock. a second call is almost guaranteed
1320		1489	* to succeed in that case, though. and looping a few more times
1321	#if EV_USE_MONOTONIC	1490	* doesn't hurt either as we only do this on time-jumps or
1322	if (expect_true (have_monotonic))	1491	* in the unlikely event of having been preempted here.
1323	{	1492	*/
1324	if (time_update_monotonic (EV_A))	1493	for (i = 4; --i; )
1325	{	1494	{
1326	ev_tstamp odiff = rtmn_diff;
1327
1328	/* loop a few times, before making important decisions.
1329	* on the choice of "4": one iteration isn't enough,
1330	* in case we get preempted during the calls to
1331	* ev_time and get_clock. a second call is almost guaranteed
1332	* to succeed in that case, though. and looping a few more times
1333	* doesn't hurt either as we only do this on time-jumps or
1334	* in the unlikely event of having been preempted here.
1335	*/
1336	for (i = 4; --i; )
1337	{
1338	rtmn_diff = ev_rt_now - mn_now;	1495	rtmn_diff = ev_rt_now - mn_now;
1339		1496
1340	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1497	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1341	return; /* all is well */	1498	return; /* all is well */
1342		1499
1343	ev_rt_now = ev_time ();	1500	ev_rt_now = ev_time ();
1344	mn_now = get_clock ();	1501	mn_now = get_clock ();
1345	now_floor = mn_now;	1502	now_floor = mn_now;
1346	}	1503	}
1347		1504
1348	# if EV_PERIODIC_ENABLE	1505	# if EV_PERIODIC_ENABLE
1349	periodics_reschedule (EV_A);	1506	periodics_reschedule (EV_A);
1350	# endif	1507	# endif
1351	/* no timer adjustment, as the monotonic clock doesn't jump */	1508	/* no timer adjustment, as the monotonic clock doesn't jump */
1352	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1509	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1353	}
1354	}	1510	}
1355	else	1511	else
1356	#endif	1512	#endif
1357	{	1513	{
1358	ev_rt_now = ev_time ();	1514	ev_rt_now = ev_time ();
1359		1515
1360	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1516	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1361	{	1517	{
1362	#if EV_PERIODIC_ENABLE	1518	#if EV_PERIODIC_ENABLE
1363	periodics_reschedule (EV_A);	1519	periodics_reschedule (EV_A);
1364	#endif	1520	#endif
1365
1366	/* adjust timers. this is easy, as the offset is the same for all of them */	1521	/* adjust timers. this is easy, as the offset is the same for all of them */
1367	for (i = 0; i < timercnt; ++i)	1522	for (i = 0; i < timercnt; ++i)
1368	((WT)timers [i])->at += ev_rt_now - mn_now;	1523	((WT)timers [i])->at += ev_rt_now - mn_now;
1369	}	1524	}
1370		1525
…		…
1387	static int loop_done;	1542	static int loop_done;
1388		1543
1389	void	1544	void
1390	ev_loop (EV_P_ int flags)	1545	ev_loop (EV_P_ int flags)
1391	{	1546	{
1392	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)	1547	loop_done = EVUNLOOP_CANCEL;
1393	? EVUNLOOP_ONE
1394	: EVUNLOOP_CANCEL;
1395		1548
1396	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1549	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1397		1550
1398	do	1551	do
1399	{	1552	{
…		…
1433	/* update fd-related kernel structures */	1586	/* update fd-related kernel structures */
1434	fd_reify (EV_A);	1587	fd_reify (EV_A);
1435		1588
1436	/* calculate blocking time */	1589	/* calculate blocking time */
1437	{	1590	{
1438	ev_tstamp block;	1591	ev_tstamp waittime = 0.;
		1592	ev_tstamp sleeptime = 0.;
1439		1593
1440	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))	1594	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1441	block = 0.; /* do not block at all */
1442	else
1443	{	1595	{
1444	/* update time to cancel out callback processing overhead */	1596	/* update time to cancel out callback processing overhead */
1445	#if EV_USE_MONOTONIC
1446	if (expect_true (have_monotonic))
1447	time_update_monotonic (EV_A);	1597	time_update (EV_A_ 1e100);
1448	else
1449	#endif
1450	{
1451	ev_rt_now = ev_time ();
1452	mn_now = ev_rt_now;
1453	}
1454		1598
1455	block = MAX_BLOCKTIME;	1599	waittime = MAX_BLOCKTIME;
1456		1600
1457	if (timercnt)	1601	if (timercnt)
1458	{	1602	{
1459	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1603	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1460	if (block > to) block = to;	1604	if (waittime > to) waittime = to;
1461	}	1605	}
1462		1606
1463	#if EV_PERIODIC_ENABLE	1607	#if EV_PERIODIC_ENABLE
1464	if (periodiccnt)	1608	if (periodiccnt)
1465	{	1609	{
1466	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1610	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1467	if (block > to) block = to;	1611	if (waittime > to) waittime = to;
1468	}	1612	}
1469	#endif	1613	#endif
1470		1614
1471	if (expect_false (block < 0.)) block = 0.;	1615	if (expect_false (waittime < timeout_blocktime))
		1616	waittime = timeout_blocktime;
		1617
		1618	sleeptime = waittime - backend_fudge;
		1619
		1620	if (expect_true (sleeptime > io_blocktime))
		1621	sleeptime = io_blocktime;
		1622
		1623	if (sleeptime)
		1624	{
		1625	ev_sleep (sleeptime);
		1626	waittime -= sleeptime;
		1627	}
1472	}	1628	}
1473		1629
1474	++loop_count;	1630	++loop_count;
1475	backend_poll (EV_A_ block);	1631	backend_poll (EV_A_ waittime);
		1632
		1633	/* update ev_rt_now, do magic */
		1634	time_update (EV_A_ waittime + sleeptime);
1476	}	1635	}
1477
1478	/* update ev_rt_now, do magic */
1479	time_update (EV_A);
1480		1636
1481	/* queue pending timers and reschedule them */	1637	/* queue pending timers and reschedule them */
1482	timers_reify (EV_A); /* relative timers called last */	1638	timers_reify (EV_A); /* relative timers called last */
1483	#if EV_PERIODIC_ENABLE	1639	#if EV_PERIODIC_ENABLE
1484	periodics_reify (EV_A); /* absolute timers called first */	1640	periodics_reify (EV_A); /* absolute timers called first */
…		…
1492	/* queue check watchers, to be executed first */	1648	/* queue check watchers, to be executed first */
1493	if (expect_false (checkcnt))	1649	if (expect_false (checkcnt))
1494	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1650	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1495		1651
1496	call_pending (EV_A);	1652	call_pending (EV_A);
1497
1498	}	1653	}
1499	while (expect_true (activecnt && !loop_done));	1654	while (expect_true (
		1655	activecnt
		1656	&& !loop_done
		1657	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
		1658	));
1500		1659
1501	if (loop_done == EVUNLOOP_ONE)	1660	if (loop_done == EVUNLOOP_ONE)
1502	loop_done = EVUNLOOP_CANCEL;	1661	loop_done = EVUNLOOP_CANCEL;
1503	}	1662	}
1504		1663
…		…
1595		1754
1596	assert (("ev_io_start called with negative fd", fd >= 0));	1755	assert (("ev_io_start called with negative fd", fd >= 0));
1597		1756
1598	ev_start (EV_A_ (W)w, 1);	1757	ev_start (EV_A_ (W)w, 1);
1599	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1758	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1600	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1759	wlist_add (&anfds[fd].head, (WL)w);
1601		1760
1602	fd_change (EV_A_ fd);	1761	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
		1762	w->events &= ~EV_IOFDSET;
1603	}	1763	}
1604		1764
1605	void noinline	1765	void noinline
1606	ev_io_stop (EV_P_ ev_io *w)	1766	ev_io_stop (EV_P_ ev_io *w)
1607	{	1767	{
…		…
1609	if (expect_false (!ev_is_active (w)))	1769	if (expect_false (!ev_is_active (w)))
1610	return;	1770	return;
1611		1771
1612	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1772	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1613		1773
1614	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1774	wlist_del (&anfds[w->fd].head, (WL)w);
1615	ev_stop (EV_A_ (W)w);	1775	ev_stop (EV_A_ (W)w);
1616		1776
1617	fd_change (EV_A_ w->fd);	1777	fd_change (EV_A_ w->fd, 1);
1618	}	1778	}
1619		1779
1620	void noinline	1780	void noinline
1621	ev_timer_start (EV_P_ ev_timer *w)	1781	ev_timer_start (EV_P_ ev_timer *w)
1622	{	1782	{
…		…
1626	((WT)w)->at += mn_now;	1786	((WT)w)->at += mn_now;
1627		1787
1628	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1788	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1629		1789
1630	ev_start (EV_A_ (W)w, ++timercnt);	1790	ev_start (EV_A_ (W)w, ++timercnt);
1631	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	1791	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1632	timers [timercnt - 1] = w;	1792	timers [timercnt - 1] = (WT)w;
1633	upheap ((WT *)timers, timercnt - 1);	1793	upheap (timers, timercnt - 1);
1634		1794
1635	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/	1795	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/
1636	}	1796	}
1637		1797
1638	void noinline	1798	void noinline
…		…
1640	{	1800	{
1641	clear_pending (EV_A_ (W)w);	1801	clear_pending (EV_A_ (W)w);
1642	if (expect_false (!ev_is_active (w)))	1802	if (expect_false (!ev_is_active (w)))
1643	return;	1803	return;
1644		1804
1645	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1805	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1646		1806
1647	{	1807	{
1648	int active = ((W)w)->active;	1808	int active = ((W)w)->active;
1649		1809
1650	if (expect_true (--active < --timercnt))	1810	if (expect_true (--active < --timercnt))
1651	{	1811	{
1652	timers [active] = timers [timercnt];	1812	timers [active] = timers [timercnt];
1653	adjustheap ((WT *)timers, timercnt, active);	1813	adjustheap (timers, timercnt, active);
1654	}	1814	}
1655	}	1815	}
1656		1816
1657	((WT)w)->at -= mn_now;	1817	((WT)w)->at -= mn_now;
1658		1818
…		…
1665	if (ev_is_active (w))	1825	if (ev_is_active (w))
1666	{	1826	{
1667	if (w->repeat)	1827	if (w->repeat)
1668	{	1828	{
1669	((WT)w)->at = mn_now + w->repeat;	1829	((WT)w)->at = mn_now + w->repeat;
1670	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1830	adjustheap (timers, timercnt, ((W)w)->active - 1);
1671	}	1831	}
1672	else	1832	else
1673	ev_timer_stop (EV_A_ w);	1833	ev_timer_stop (EV_A_ w);
1674	}	1834	}
1675	else if (w->repeat)	1835	else if (w->repeat)
…		…
1696	}	1856	}
1697	else	1857	else
1698	((WT)w)->at = w->offset;	1858	((WT)w)->at = w->offset;
1699		1859
1700	ev_start (EV_A_ (W)w, ++periodiccnt);	1860	ev_start (EV_A_ (W)w, ++periodiccnt);
1701	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	1861	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1702	periodics [periodiccnt - 1] = w;	1862	periodics [periodiccnt - 1] = (WT)w;
1703	upheap ((WT *)periodics, periodiccnt - 1);	1863	upheap (periodics, periodiccnt - 1);
1704		1864
1705	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/	1865	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/
1706	}	1866	}
1707		1867
1708	void noinline	1868	void noinline
…		…
1710	{	1870	{
1711	clear_pending (EV_A_ (W)w);	1871	clear_pending (EV_A_ (W)w);
1712	if (expect_false (!ev_is_active (w)))	1872	if (expect_false (!ev_is_active (w)))
1713	return;	1873	return;
1714		1874
1715	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1875	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1716		1876
1717	{	1877	{
1718	int active = ((W)w)->active;	1878	int active = ((W)w)->active;
1719		1879
1720	if (expect_true (--active < --periodiccnt))	1880	if (expect_true (--active < --periodiccnt))
1721	{	1881	{
1722	periodics [active] = periodics [periodiccnt];	1882	periodics [active] = periodics [periodiccnt];
1723	adjustheap ((WT *)periodics, periodiccnt, active);	1883	adjustheap (periodics, periodiccnt, active);
1724	}	1884	}
1725	}	1885	}
1726		1886
1727	ev_stop (EV_A_ (W)w);	1887	ev_stop (EV_A_ (W)w);
1728	}	1888	}
…		…
1749	if (expect_false (ev_is_active (w)))	1909	if (expect_false (ev_is_active (w)))
1750	return;	1910	return;
1751		1911
1752	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1912	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1753		1913
		1914	evpipe_init (EV_A);
		1915
		1916	{
		1917	#ifndef _WIN32
		1918	sigset_t full, prev;
		1919	sigfillset (&full);
		1920	sigprocmask (SIG_SETMASK, &full, &prev);
		1921	#endif
		1922
		1923	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1924
		1925	#ifndef _WIN32
		1926	sigprocmask (SIG_SETMASK, &prev, 0);
		1927	#endif
		1928	}
		1929
1754	ev_start (EV_A_ (W)w, 1);	1930	ev_start (EV_A_ (W)w, 1);
1755	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1931	wlist_add (&signals [w->signum - 1].head, (WL)w);
1757		1932
1758	if (!((WL)w)->next)	1933	if (!((WL)w)->next)
1759	{	1934	{
1760	#if _WIN32	1935	#if _WIN32
1761	signal (w->signum, sighandler);	1936	signal (w->signum, ev_sighandler);
1762	#else	1937	#else
1763	struct sigaction sa;	1938	struct sigaction sa;
1764	sa.sa_handler = sighandler;	1939	sa.sa_handler = ev_sighandler;
1765	sigfillset (&sa.sa_mask);	1940	sigfillset (&sa.sa_mask);
1766	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1941	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1767	sigaction (w->signum, &sa, 0);	1942	sigaction (w->signum, &sa, 0);
1768	#endif	1943	#endif
1769	}	1944	}
…		…
1774	{	1949	{
1775	clear_pending (EV_A_ (W)w);	1950	clear_pending (EV_A_ (W)w);
1776	if (expect_false (!ev_is_active (w)))	1951	if (expect_false (!ev_is_active (w)))
1777	return;	1952	return;
1778		1953
1779	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1954	wlist_del (&signals [w->signum - 1].head, (WL)w);
1780	ev_stop (EV_A_ (W)w);	1955	ev_stop (EV_A_ (W)w);
1781		1956
1782	if (!signals [w->signum - 1].head)	1957	if (!signals [w->signum - 1].head)
1783	signal (w->signum, SIG_DFL);	1958	signal (w->signum, SIG_DFL);
1784	}	1959	}
…		…
1791	#endif	1966	#endif
1792	if (expect_false (ev_is_active (w)))	1967	if (expect_false (ev_is_active (w)))
1793	return;	1968	return;
1794		1969
1795	ev_start (EV_A_ (W)w, 1);	1970	ev_start (EV_A_ (W)w, 1);
1796	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	1971	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1797	}	1972	}
1798		1973
1799	void	1974	void
1800	ev_child_stop (EV_P_ ev_child *w)	1975	ev_child_stop (EV_P_ ev_child *w)
1801	{	1976	{
1802	clear_pending (EV_A_ (W)w);	1977	clear_pending (EV_A_ (W)w);
1803	if (expect_false (!ev_is_active (w)))	1978	if (expect_false (!ev_is_active (w)))
1804	return;	1979	return;
1805		1980
1806	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	1981	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1807	ev_stop (EV_A_ (W)w);	1982	ev_stop (EV_A_ (W)w);
1808	}	1983	}
1809		1984
1810	#if EV_STAT_ENABLE	1985	#if EV_STAT_ENABLE
1811		1986
…		…
2153		2328
2154	#if EV_EMBED_ENABLE	2329	#if EV_EMBED_ENABLE
2155	void noinline	2330	void noinline
2156	ev_embed_sweep (EV_P_ ev_embed *w)	2331	ev_embed_sweep (EV_P_ ev_embed *w)
2157	{	2332	{
2158	ev_loop (w->loop, EVLOOP_NONBLOCK);	2333	ev_loop (w->other, EVLOOP_NONBLOCK);
2159	}	2334	}
2160		2335
2161	static void	2336	static void
2162	embed_cb (EV_P_ ev_io *io, int revents)	2337	embed_io_cb (EV_P_ ev_io *io, int revents)
2163	{	2338	{
2164	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2339	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
2165		2340
2166	if (ev_cb (w))	2341	if (ev_cb (w))
2167	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2342	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2168	else	2343	else
2169	ev_embed_sweep (loop, w);	2344	ev_loop (w->other, EVLOOP_NONBLOCK);
2170	}	2345	}
		2346
		2347	static void
		2348	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2349	{
		2350	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2351
		2352	{
		2353	struct ev_loop *loop = w->other;
		2354
		2355	while (fdchangecnt)
		2356	{
		2357	fd_reify (EV_A);
		2358	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2359	}
		2360	}
		2361	}
		2362
		2363	#if 0
		2364	static void
		2365	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2366	{
		2367	ev_idle_stop (EV_A_ idle);
		2368	}
		2369	#endif
2171		2370
2172	void	2371	void
2173	ev_embed_start (EV_P_ ev_embed *w)	2372	ev_embed_start (EV_P_ ev_embed *w)
2174	{	2373	{
2175	if (expect_false (ev_is_active (w)))	2374	if (expect_false (ev_is_active (w)))
2176	return;	2375	return;
2177		2376
2178	{	2377	{
2179	struct ev_loop *loop = w->loop;	2378	struct ev_loop *loop = w->other;
2180	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2379	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2181	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2380	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2182	}	2381	}
2183		2382
2184	ev_set_priority (&w->io, ev_priority (w));	2383	ev_set_priority (&w->io, ev_priority (w));
2185	ev_io_start (EV_A_ &w->io);	2384	ev_io_start (EV_A_ &w->io);
2186		2385
		2386	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2387	ev_set_priority (&w->prepare, EV_MINPRI);
		2388	ev_prepare_start (EV_A_ &w->prepare);
		2389
		2390	/ev_idle_init (&w->idle, e,bed_idle_cb);/
		2391
2187	ev_start (EV_A_ (W)w, 1);	2392	ev_start (EV_A_ (W)w, 1);
2188	}	2393	}
2189		2394
2190	void	2395	void
2191	ev_embed_stop (EV_P_ ev_embed *w)	2396	ev_embed_stop (EV_P_ ev_embed *w)
…		…
2193	clear_pending (EV_A_ (W)w);	2398	clear_pending (EV_A_ (W)w);
2194	if (expect_false (!ev_is_active (w)))	2399	if (expect_false (!ev_is_active (w)))
2195	return;	2400	return;
2196		2401
2197	ev_io_stop (EV_A_ &w->io);	2402	ev_io_stop (EV_A_ &w->io);
		2403	ev_prepare_stop (EV_A_ &w->prepare);
2198		2404
2199	ev_stop (EV_A_ (W)w);	2405	ev_stop (EV_A_ (W)w);
2200	}	2406	}
2201	#endif	2407	#endif
2202		2408
…		…
2227		2433
2228	ev_stop (EV_A_ (W)w);	2434	ev_stop (EV_A_ (W)w);
2229	}	2435	}
2230	#endif	2436	#endif
2231		2437
		2438	#if EV_ASYNC_ENABLE
		2439	void
		2440	ev_async_start (EV_P_ ev_async *w)
		2441	{
		2442	if (expect_false (ev_is_active (w)))
		2443	return;
		2444
		2445	evpipe_init (EV_A);
		2446
		2447	ev_start (EV_A_ (W)w, ++asynccnt);
		2448	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2449	asyncs [asynccnt - 1] = w;
		2450	}
		2451
		2452	void
		2453	ev_async_stop (EV_P_ ev_async *w)
		2454	{
		2455	clear_pending (EV_A_ (W)w);
		2456	if (expect_false (!ev_is_active (w)))
		2457	return;
		2458
		2459	{
		2460	int active = ((W)w)->active;
		2461	asyncs [active - 1] = asyncs [--asynccnt];
		2462	((W)asyncs [active - 1])->active = active;
		2463	}
		2464
		2465	ev_stop (EV_A_ (W)w);
		2466	}
		2467
		2468	void
		2469	ev_async_send (EV_P_ ev_async *w)
		2470	{
		2471	w->sent = 1;
		2472	evpipe_write (EV_A_ &gotasync);
		2473	}
		2474	#endif
		2475
2232	/*****************************************************************************/	2476	/*****************************************************************************/
2233		2477
2234	struct ev_once	2478	struct ev_once
2235	{	2479	{
2236	ev_io io;	2480	ev_io io;
…		…
2291	ev_timer_set (&once->to, timeout, 0.);	2535	ev_timer_set (&once->to, timeout, 0.);
2292	ev_timer_start (EV_A_ &once->to);	2536	ev_timer_start (EV_A_ &once->to);
2293	}	2537	}
2294	}	2538	}
2295		2539
		2540	#if EV_MULTIPLICITY
		2541	#include "ev_wrap.h"
		2542	#endif
		2543
2296	#ifdef __cplusplus	2544	#ifdef __cplusplus
2297	}	2545	}
2298	#endif	2546	#endif
2299		2547

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Comparing libev/ev.c (file contents): Revision 1.173 by root, Sun Dec 9 19:42:57 2007 UTC vs. Revision 1.219 by root, Wed Apr 2 10:55:39 2008 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.173 by root, Sun Dec 9 19:42:57 2007 UTC vs.
Revision 1.219 by root, Wed Apr 2 10:55:39 2008 UTC