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

Comparing libev/ev.c (file contents):
Revision 1.182 by root, Wed Dec 12 01:27:08 2007 UTC vs.
Revision 1.209 by root, Tue Feb 5 23:56:33 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
210
211	#if !EV_STAT_ENABLE
212	# define EV_USE_INOTIFY 0
213	#endif
214
215	#if EV_USE_INOTIFY
216	# include <sys/inotify.h>
217	#endif	244	#endif
218		245
219	/**/	246	/**/
220		247
221	/*	248	/*
…		…
230		257
231	#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) */
232	#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) */
233	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */	260	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
234		261
235	#if __GNUC__ >= 3	262	#if __GNUC__ >= 4
236	# define expect(expr,value) __builtin_expect ((expr),(value))	263	# define expect(expr,value) __builtin_expect ((expr),(value))
237	# define noinline __attribute__ ((noinline))	264	# define noinline __attribute__ ((noinline))
238	#else	265	#else
239	# define expect(expr,value) (expr)	266	# define expect(expr,value) (expr)
240	# define noinline	267	# define noinline
…		…
261		288
262	typedef ev_watcher *W;	289	typedef ev_watcher *W;
263	typedef ev_watcher_list *WL;	290	typedef ev_watcher_list *WL;
264	typedef ev_watcher_time *WT;	291	typedef ev_watcher_time *WT;
265		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 */
266	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
267		298
268	#ifdef _WIN32	299	#ifdef _WIN32
269	# include "ev_win32.c"	300	# include "ev_win32.c"
270	#endif	301	#endif
271		302
…		…
407	{	438	{
408	return ev_rt_now;	439	return ev_rt_now;
409	}	440	}
410	#endif	441	#endif
411		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 (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
412	int inline_size	470	int inline_size
413	array_nextsize (int elem, int cur, int cnt)	471	array_nextsize (int elem, int cur, int cnt)
414	{	472	{
415	int ncur = cur + 1;	473	int ncur = cur + 1;
416		474
…		…
533	{	591	{
534	int fd = fdchanges [i];	592	int fd = fdchanges [i];
535	ANFD *anfd = anfds + fd;	593	ANFD *anfd = anfds + fd;
536	ev_io *w;	594	ev_io *w;
537		595
538	int events = 0;	596	unsigned char events = 0;
539		597
540	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)
541	events \|= w->events;	599	events \|= (unsigned char)w->events;
542		600
543	#if EV_SELECT_IS_WINSOCKET	601	#if EV_SELECT_IS_WINSOCKET
544	if (events)	602	if (events)
545	{	603	{
546	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
547	anfd->handle = _get_osfhandle (fd);	608	anfd->handle = _get_osfhandle (fd);
		609	#endif
548	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));
549	}	611	}
550	#endif	612	#endif
551		613
		614	{
		615	unsigned char o_events = anfd->events;
		616	unsigned char o_reify = anfd->reify;
		617
552	anfd->reify = 0;	618	anfd->reify = 0;
553
554	backend_modify (EV_A_ fd, anfd->events, events);
555	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	}
556	}	624	}
557		625
558	fdchangecnt = 0;	626	fdchangecnt = 0;
559	}	627	}
560		628
561	void inline_size	629	void inline_size
562	fd_change (EV_P_ int fd)	630	fd_change (EV_P_ int fd, int flags)
563	{	631	{
564	if (expect_false (anfds [fd].reify))	632	unsigned char reify = anfds [fd].reify;
565	return;
566
567	anfds [fd].reify = 1;	633	anfds [fd].reify \|= flags;
568		634
		635	if (expect_true (!reify))
		636	{
569	++fdchangecnt;	637	++fdchangecnt;
570	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
571	fdchanges [fdchangecnt - 1] = fd;	639	fdchanges [fdchangecnt - 1] = fd;
		640	}
572	}	641	}
573		642
574	void inline_speed	643	void inline_speed
575	fd_kill (EV_P_ int fd)	644	fd_kill (EV_P_ int fd)
576	{	645	{
…		…
627		696
628	for (fd = 0; fd < anfdmax; ++fd)	697	for (fd = 0; fd < anfdmax; ++fd)
629	if (anfds [fd].events)	698	if (anfds [fd].events)
630	{	699	{
631	anfds [fd].events = 0;	700	anfds [fd].events = 0;
632	fd_change (EV_A_ fd);	701	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
633	}	702	}
634	}	703	}
635		704
636	/*****************************************************************************/	705	/*****************************************************************************/
637		706
…		…
694	/*****************************************************************************/	763	/*****************************************************************************/
695		764
696	typedef struct	765	typedef struct
697	{	766	{
698	WL head;	767	WL head;
699	sig_atomic_t volatile gotsig;	768	EV_ATOMIC_T gotsig;
700	} ANSIG;	769	} ANSIG;
701		770
702	static ANSIG *signals;	771	static ANSIG *signals;
703	static int signalmax;	772	static int signalmax;
704		773
705	static int sigpipe [2];	774	static EV_ATOMIC_T gotsig;
706	static sig_atomic_t volatile gotsig;
707	static ev_io sigev;
708		775
709	void inline_size	776	void inline_size
710	signals_init (ANSIG *base, int count)	777	signals_init (ANSIG *base, int count)
711	{	778	{
712	while (count--)	779	while (count--)
…		…
716		783
717	++base;	784	++base;
718	}	785	}
719	}	786	}
720		787
721	static void	788	/*****************************************************************************/
722	sighandler (int signum)
723	{
724	#if _WIN32
725	signal (signum, sighandler);
726	#endif
727
728	signals [signum - 1].gotsig = 1;
729
730	if (!gotsig)
731	{
732	int old_errno = errno;
733	gotsig = 1;
734	write (sigpipe [1], &signum, 1);
735	errno = old_errno;
736	}
737	}
738
739	void noinline
740	ev_feed_signal_event (EV_P_ int signum)
741	{
742	WL w;
743
744	#if EV_MULTIPLICITY
745	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
746	#endif
747
748	--signum;
749
750	if (signum < 0 \|\| signum >= signalmax)
751	return;
752
753	signals [signum].gotsig = 0;
754
755	for (w = signals [signum].head; w; w = w->next)
756	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
757	}
758
759	static void
760	sigcb (EV_P_ ev_io *iow, int revents)
761	{
762	int signum;
763
764	read (sigpipe [0], &revents, 1);
765	gotsig = 0;
766
767	for (signum = signalmax; signum--; )
768	if (signals [signum].gotsig)
769	ev_feed_signal_event (EV_A_ signum + 1);
770	}
771		789
772	void inline_speed	790	void inline_speed
773	fd_intern (int fd)	791	fd_intern (int fd)
774	{	792	{
775	#ifdef _WIN32	793	#ifdef _WIN32
…		…
780	fcntl (fd, F_SETFL, O_NONBLOCK);	798	fcntl (fd, F_SETFL, O_NONBLOCK);
781	#endif	799	#endif
782	}	800	}
783		801
784	static void noinline	802	static void noinline
785	siginit (EV_P)	803	evpipe_init (EV_P)
786	{	804	{
		805	if (!ev_is_active (&pipeev))
		806	{
		807	while (pipe (evpipe))
		808	syserr ("(libev) error creating signal/async pipe");
		809
787	fd_intern (sigpipe [0]);	810	fd_intern (evpipe [0]);
788	fd_intern (sigpipe [1]);	811	fd_intern (evpipe [1]);
789		812
790	ev_io_set (&sigev, sigpipe [0], EV_READ);	813	ev_io_set (&pipeev, evpipe [0], EV_READ);
791	ev_io_start (EV_A_ &sigev);	814	ev_io_start (EV_A_ &pipeev);
792	ev_unref (EV_A); /* child watcher should not keep loop alive */	815	ev_unref (EV_A); /* child watcher should not keep loop alive */
		816	}
		817	}
		818
		819	void inline_size
		820	evpipe_write (EV_P_ int sig, int async)
		821	{
		822	if (!(gotasync \|\| gotsig))
		823	{
		824	int old_errno = errno;
		825
		826	if (sig) gotsig = 1;
		827	if (async) gotasync = 1;
		828
		829	write (evpipe [1], &old_errno, 1);
		830	errno = old_errno;
		831	}
		832	}
		833
		834	static void
		835	pipecb (EV_P_ ev_io *iow, int revents)
		836	{
		837	{
		838	int dummy;
		839	read (evpipe [0], &dummy, 1);
		840	}
		841
		842	if (gotsig)
		843	{
		844	int signum;
		845	gotsig = 0;
		846
		847	for (signum = signalmax; signum--; )
		848	if (signals [signum].gotsig)
		849	ev_feed_signal_event (EV_A_ signum + 1);
		850	}
		851
		852	#if EV_ASYNC_ENABLE
		853	if (gotasync)
		854	{
		855	int i;
		856	gotasync = 0;
		857
		858	for (i = asynccnt; i--; )
		859	if (asyncs [i]->sent)
		860	{
		861	asyncs [i]->sent = 0;
		862	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		863	}
		864	}
		865	#endif
793	}	866	}
794		867
795	/*****************************************************************************/	868	/*****************************************************************************/
796		869
		870	static void
		871	sighandler (int signum)
		872	{
		873	#if EV_MULTIPLICITY
		874	struct ev_loop *loop = &default_loop_struct;
		875	#endif
		876
		877	#if _WIN32
		878	signal (signum, sighandler);
		879	#endif
		880
		881	signals [signum - 1].gotsig = 1;
		882	evpipe_write (EV_A_ 1, 0);
		883	}
		884
		885	void noinline
		886	ev_feed_signal_event (EV_P_ int signum)
		887	{
		888	WL w;
		889
		890	#if EV_MULTIPLICITY
		891	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		892	#endif
		893
		894	--signum;
		895
		896	if (signum < 0 \|\| signum >= signalmax)
		897	return;
		898
		899	signals [signum].gotsig = 0;
		900
		901	for (w = signals [signum].head; w; w = w->next)
		902	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		903	}
		904
		905	/*****************************************************************************/
		906
797	static WL childs [EV_PID_HASHSIZE];	907	static WL childs [EV_PID_HASHSIZE];
798		908
799	#ifndef _WIN32	909	#ifndef _WIN32
800		910
801	static ev_signal childev;	911	static ev_signal childev;
		912
		913	#ifndef WIFCONTINUED
		914	# define WIFCONTINUED(status) 0
		915	#endif
802		916
803	void inline_speed	917	void inline_speed
804	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	918	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
805	{	919	{
806	ev_child *w;	920	ev_child *w;
		921	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
807		922
808	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	923	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		924	{
809	if (w->pid == pid \|\| !w->pid)	925	if ((w->pid == pid \|\| !w->pid)
		926	&& (!traced \|\| (w->flags & 1)))
810	{	927	{
811	ev_set_priority (w, ev_priority (sw)); /* need to do it now */	928	ev_set_priority (w, ev_priority (sw)); /* need to do it now */
812	w->rpid = pid;	929	w->rpid = pid;
813	w->rstatus = status;	930	w->rstatus = status;
814	ev_feed_event (EV_A_ (W)w, EV_CHILD);	931	ev_feed_event (EV_A_ (W)w, EV_CHILD);
815	}	932	}
		933	}
816	}	934	}
817		935
818	#ifndef WCONTINUED	936	#ifndef WCONTINUED
819	# define WCONTINUED 0	937	# define WCONTINUED 0
820	#endif	938	#endif
…		…
917	}	1035	}
918		1036
919	unsigned int	1037	unsigned int
920	ev_embeddable_backends (void)	1038	ev_embeddable_backends (void)
921	{	1039	{
922	return EVBACKEND_EPOLL	1040	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
923	\| EVBACKEND_KQUEUE	1041
924	\| EVBACKEND_PORT;	1042	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1043	/* please fix it and tell me how to detect the fix */
		1044	flags &= ~EVBACKEND_EPOLL;
		1045
		1046	return flags;
925	}	1047	}
926		1048
927	unsigned int	1049	unsigned int
928	ev_backend (EV_P)	1050	ev_backend (EV_P)
929	{	1051	{
…		…
932		1054
933	unsigned int	1055	unsigned int
934	ev_loop_count (EV_P)	1056	ev_loop_count (EV_P)
935	{	1057	{
936	return loop_count;	1058	return loop_count;
		1059	}
		1060
		1061	void
		1062	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1063	{
		1064	io_blocktime = interval;
		1065	}
		1066
		1067	void
		1068	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1069	{
		1070	timeout_blocktime = interval;
937	}	1071	}
938		1072
939	static void noinline	1073	static void noinline
940	loop_init (EV_P_ unsigned int flags)	1074	loop_init (EV_P_ unsigned int flags)
941	{	1075	{
…		…
947	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1081	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
948	have_monotonic = 1;	1082	have_monotonic = 1;
949	}	1083	}
950	#endif	1084	#endif
951		1085
952	ev_rt_now = ev_time ();	1086	ev_rt_now = ev_time ();
953	mn_now = get_clock ();	1087	mn_now = get_clock ();
954	now_floor = mn_now;	1088	now_floor = mn_now;
955	rtmn_diff = ev_rt_now - mn_now;	1089	rtmn_diff = ev_rt_now - mn_now;
		1090
		1091	io_blocktime = 0.;
		1092	timeout_blocktime = 0.;
		1093	backend = 0;
		1094	backend_fd = -1;
		1095	gotasync = 0;
		1096	#if EV_USE_INOTIFY
		1097	fs_fd = -2;
		1098	#endif
956		1099
957	/* pid check not overridable via env */	1100	/* pid check not overridable via env */
958	#ifndef _WIN32	1101	#ifndef _WIN32
959	if (flags & EVFLAG_FORKCHECK)	1102	if (flags & EVFLAG_FORKCHECK)
960	curpid = getpid ();	1103	curpid = getpid ();
…		…
966	flags = atoi (getenv ("LIBEV_FLAGS"));	1109	flags = atoi (getenv ("LIBEV_FLAGS"));
967		1110
968	if (!(flags & 0x0000ffffUL))	1111	if (!(flags & 0x0000ffffUL))
969	flags \|= ev_recommended_backends ();	1112	flags \|= ev_recommended_backends ();
970		1113
971	backend = 0;
972	backend_fd = -1;
973	#if EV_USE_INOTIFY
974	fs_fd = -2;
975	#endif
976
977	#if EV_USE_PORT	1114	#if EV_USE_PORT
978	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1115	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
979	#endif	1116	#endif
980	#if EV_USE_KQUEUE	1117	#if EV_USE_KQUEUE
981	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1118	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
988	#endif	1125	#endif
989	#if EV_USE_SELECT	1126	#if EV_USE_SELECT
990	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1127	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
991	#endif	1128	#endif
992		1129
993	ev_init (&sigev, sigcb);	1130	ev_init (&pipeev, pipecb);
994	ev_set_priority (&sigev, EV_MAXPRI);	1131	ev_set_priority (&pipeev, EV_MAXPRI);
995	}	1132	}
996	}	1133	}
997		1134
998	static void noinline	1135	static void noinline
999	loop_destroy (EV_P)	1136	loop_destroy (EV_P)
1000	{	1137	{
1001	int i;	1138	int i;
		1139
		1140	if (ev_is_active (&pipeev))
		1141	{
		1142	ev_ref (EV_A); /* signal watcher */
		1143	ev_io_stop (EV_A_ &pipeev);
		1144
		1145	close (evpipe [0]); evpipe [0] = 0;
		1146	close (evpipe [1]); evpipe [1] = 0;
		1147	}
1002		1148
1003	#if EV_USE_INOTIFY	1149	#if EV_USE_INOTIFY
1004	if (fs_fd >= 0)	1150	if (fs_fd >= 0)
1005	close (fs_fd);	1151	close (fs_fd);
1006	#endif	1152	#endif
…		…
1029	array_free (pending, [i]);	1175	array_free (pending, [i]);
1030	#if EV_IDLE_ENABLE	1176	#if EV_IDLE_ENABLE
1031	array_free (idle, [i]);	1177	array_free (idle, [i]);
1032	#endif	1178	#endif
1033	}	1179	}
		1180
		1181	ev_free (anfds); anfdmax = 0;
1034		1182
1035	/* have to use the microsoft-never-gets-it-right macro */	1183	/* have to use the microsoft-never-gets-it-right macro */
1036	array_free (fdchange, EMPTY);	1184	array_free (fdchange, EMPTY);
1037	array_free (timer, EMPTY);	1185	array_free (timer, EMPTY);
1038	#if EV_PERIODIC_ENABLE	1186	#if EV_PERIODIC_ENABLE
1039	array_free (periodic, EMPTY);	1187	array_free (periodic, EMPTY);
1040	#endif	1188	#endif
		1189	#if EV_FORK_ENABLE
		1190	array_free (fork, EMPTY);
		1191	#endif
1041	array_free (prepare, EMPTY);	1192	array_free (prepare, EMPTY);
1042	array_free (check, EMPTY);	1193	array_free (check, EMPTY);
		1194	#if EV_ASYNC_ENABLE
		1195	array_free (async, EMPTY);
		1196	#endif
1043		1197
1044	backend = 0;	1198	backend = 0;
1045	}	1199	}
1046		1200
1047	void inline_size infy_fork (EV_P);	1201	void inline_size infy_fork (EV_P);
…		…
1060	#endif	1214	#endif
1061	#if EV_USE_INOTIFY	1215	#if EV_USE_INOTIFY
1062	infy_fork (EV_A);	1216	infy_fork (EV_A);
1063	#endif	1217	#endif
1064		1218
1065	if (ev_is_active (&sigev))	1219	if (ev_is_active (&pipeev))
1066	{	1220	{
1067	/* default loop */	1221	/* this "locks" the handlers against writing to the pipe */
		1222	gotsig = gotasync = 1;
1068		1223
1069	ev_ref (EV_A);	1224	ev_ref (EV_A);
1070	ev_io_stop (EV_A_ &sigev);	1225	ev_io_stop (EV_A_ &pipeev);
1071	close (sigpipe [0]);	1226	close (evpipe [0]);
1072	close (sigpipe [1]);	1227	close (evpipe [1]);
1073		1228
1074	while (pipe (sigpipe))
1075	syserr ("(libev) error creating pipe");
1076
1077	siginit (EV_A);	1229	evpipe_init (EV_A);
		1230	/* now iterate over everything, in case we missed something */
		1231	pipecb (EV_A_ &pipeev, EV_READ);
1078	}	1232	}
1079		1233
1080	postfork = 0;	1234	postfork = 0;
1081	}	1235	}
1082		1236
…		…
1104	}	1258	}
1105		1259
1106	void	1260	void
1107	ev_loop_fork (EV_P)	1261	ev_loop_fork (EV_P)
1108	{	1262	{
1109	postfork = 1;	1263	postfork = 1; /* must be in line with ev_default_fork */
1110	}	1264	}
1111		1265
1112	#endif	1266	#endif
1113		1267
1114	#if EV_MULTIPLICITY	1268	#if EV_MULTIPLICITY
…		…
1117	#else	1271	#else
1118	int	1272	int
1119	ev_default_loop (unsigned int flags)	1273	ev_default_loop (unsigned int flags)
1120	#endif	1274	#endif
1121	{	1275	{
1122	if (sigpipe [0] == sigpipe [1])
1123	if (pipe (sigpipe))
1124	return 0;
1125
1126	if (!ev_default_loop_ptr)	1276	if (!ev_default_loop_ptr)
1127	{	1277	{
1128	#if EV_MULTIPLICITY	1278	#if EV_MULTIPLICITY
1129	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1279	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1130	#else	1280	#else
…		…
1133		1283
1134	loop_init (EV_A_ flags);	1284	loop_init (EV_A_ flags);
1135		1285
1136	if (ev_backend (EV_A))	1286	if (ev_backend (EV_A))
1137	{	1287	{
1138	siginit (EV_A);
1139
1140	#ifndef _WIN32	1288	#ifndef _WIN32
1141	ev_signal_init (&childev, childcb, SIGCHLD);	1289	ev_signal_init (&childev, childcb, SIGCHLD);
1142	ev_set_priority (&childev, EV_MAXPRI);	1290	ev_set_priority (&childev, EV_MAXPRI);
1143	ev_signal_start (EV_A_ &childev);	1291	ev_signal_start (EV_A_ &childev);
1144	ev_unref (EV_A); /* child watcher should not keep loop alive */	1292	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1161	#ifndef _WIN32	1309	#ifndef _WIN32
1162	ev_ref (EV_A); /* child watcher */	1310	ev_ref (EV_A); /* child watcher */
1163	ev_signal_stop (EV_A_ &childev);	1311	ev_signal_stop (EV_A_ &childev);
1164	#endif	1312	#endif
1165		1313
1166	ev_ref (EV_A); /* signal watcher */
1167	ev_io_stop (EV_A_ &sigev);
1168
1169	close (sigpipe [0]); sigpipe [0] = 0;
1170	close (sigpipe [1]); sigpipe [1] = 0;
1171
1172	loop_destroy (EV_A);	1314	loop_destroy (EV_A);
1173	}	1315	}
1174		1316
1175	void	1317	void
1176	ev_default_fork (void)	1318	ev_default_fork (void)
…		…
1178	#if EV_MULTIPLICITY	1320	#if EV_MULTIPLICITY
1179	struct ev_loop *loop = ev_default_loop_ptr;	1321	struct ev_loop *loop = ev_default_loop_ptr;
1180	#endif	1322	#endif
1181		1323
1182	if (backend)	1324	if (backend)
1183	postfork = 1;	1325	postfork = 1; /* must be in line with ev_loop_fork */
1184	}	1326	}
1185		1327
1186	/*****************************************************************************/	1328	/*****************************************************************************/
1187		1329
1188	void	1330	void
…		…
1443	/* update fd-related kernel structures */	1585	/* update fd-related kernel structures */
1444	fd_reify (EV_A);	1586	fd_reify (EV_A);
1445		1587
1446	/* calculate blocking time */	1588	/* calculate blocking time */
1447	{	1589	{
1448	ev_tstamp block;	1590	ev_tstamp waittime = 0.;
		1591	ev_tstamp sleeptime = 0.;
1449		1592
1450	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))	1593	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1451	block = 0.; /* do not block at all */
1452	else
1453	{	1594	{
1454	/* update time to cancel out callback processing overhead */	1595	/* update time to cancel out callback processing overhead */
1455	time_update (EV_A_ 1e100);	1596	time_update (EV_A_ 1e100);
1456		1597
1457	block = MAX_BLOCKTIME;	1598	waittime = MAX_BLOCKTIME;
1458		1599
1459	if (timercnt)	1600	if (timercnt)
1460	{	1601	{
1461	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1602	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1462	if (block > to) block = to;	1603	if (waittime > to) waittime = to;
1463	}	1604	}
1464		1605
1465	#if EV_PERIODIC_ENABLE	1606	#if EV_PERIODIC_ENABLE
1466	if (periodiccnt)	1607	if (periodiccnt)
1467	{	1608	{
1468	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1609	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1469	if (block > to) block = to;	1610	if (waittime > to) waittime = to;
1470	}	1611	}
1471	#endif	1612	#endif
1472		1613
1473	if (expect_false (block < 0.)) block = 0.;	1614	if (expect_false (waittime < timeout_blocktime))
		1615	waittime = timeout_blocktime;
		1616
		1617	sleeptime = waittime - backend_fudge;
		1618
		1619	if (expect_true (sleeptime > io_blocktime))
		1620	sleeptime = io_blocktime;
		1621
		1622	if (sleeptime)
		1623	{
		1624	ev_sleep (sleeptime);
		1625	waittime -= sleeptime;
		1626	}
1474	}	1627	}
1475		1628
1476	++loop_count;	1629	++loop_count;
1477	backend_poll (EV_A_ block);	1630	backend_poll (EV_A_ waittime);
1478		1631
1479	/* update ev_rt_now, do magic */	1632	/* update ev_rt_now, do magic */
1480	time_update (EV_A_ block);	1633	time_update (EV_A_ waittime + sleeptime);
1481	}	1634	}
1482		1635
1483	/* queue pending timers and reschedule them */	1636	/* queue pending timers and reschedule them */
1484	timers_reify (EV_A); /* relative timers called last */	1637	timers_reify (EV_A); /* relative timers called last */
1485	#if EV_PERIODIC_ENABLE	1638	#if EV_PERIODIC_ENABLE
…		…
1599		1752
1600	ev_start (EV_A_ (W)w, 1);	1753	ev_start (EV_A_ (W)w, 1);
1601	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1754	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1602	wlist_add (&anfds[fd].head, (WL)w);	1755	wlist_add (&anfds[fd].head, (WL)w);
1603		1756
1604	fd_change (EV_A_ fd);	1757	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
		1758	w->events &= ~EV_IOFDSET;
1605	}	1759	}
1606		1760
1607	void noinline	1761	void noinline
1608	ev_io_stop (EV_P_ ev_io *w)	1762	ev_io_stop (EV_P_ ev_io *w)
1609	{	1763	{
…		…
1614	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1768	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1615		1769
1616	wlist_del (&anfds[w->fd].head, (WL)w);	1770	wlist_del (&anfds[w->fd].head, (WL)w);
1617	ev_stop (EV_A_ (W)w);	1771	ev_stop (EV_A_ (W)w);
1618		1772
1619	fd_change (EV_A_ w->fd);	1773	fd_change (EV_A_ w->fd, 1);
1620	}	1774	}
1621		1775
1622	void noinline	1776	void noinline
1623	ev_timer_start (EV_P_ ev_timer *w)	1777	ev_timer_start (EV_P_ ev_timer *w)
1624	{	1778	{
…		…
1750	#endif	1904	#endif
1751	if (expect_false (ev_is_active (w)))	1905	if (expect_false (ev_is_active (w)))
1752	return;	1906	return;
1753		1907
1754	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1908	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1909
		1910	evpipe_init (EV_A);
1755		1911
1756	{	1912	{
1757	#ifndef _WIN32	1913	#ifndef _WIN32
1758	sigset_t full, prev;	1914	sigset_t full, prev;
1759	sigfillset (&full);	1915	sigfillset (&full);
…		…
2168		2324
2169	#if EV_EMBED_ENABLE	2325	#if EV_EMBED_ENABLE
2170	void noinline	2326	void noinline
2171	ev_embed_sweep (EV_P_ ev_embed *w)	2327	ev_embed_sweep (EV_P_ ev_embed *w)
2172	{	2328	{
2173	ev_loop (w->loop, EVLOOP_NONBLOCK);	2329	ev_loop (w->other, EVLOOP_NONBLOCK);
2174	}	2330	}
2175		2331
2176	static void	2332	static void
2177	embed_cb (EV_P_ ev_io *io, int revents)	2333	embed_io_cb (EV_P_ ev_io *io, int revents)
2178	{	2334	{
2179	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2335	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
2180		2336
2181	if (ev_cb (w))	2337	if (ev_cb (w))
2182	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2338	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2183	else	2339	else
2184	ev_embed_sweep (loop, w);	2340	ev_loop (w->other, EVLOOP_NONBLOCK);
2185	}	2341	}
		2342
		2343	static void
		2344	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2345	{
		2346	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2347
		2348	{
		2349	struct ev_loop *loop = w->other;
		2350
		2351	while (fdchangecnt)
		2352	{
		2353	fd_reify (EV_A);
		2354	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2355	}
		2356	}
		2357	}
		2358
		2359	#if 0
		2360	static void
		2361	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2362	{
		2363	ev_idle_stop (EV_A_ idle);
		2364	}
		2365	#endif
2186		2366
2187	void	2367	void
2188	ev_embed_start (EV_P_ ev_embed *w)	2368	ev_embed_start (EV_P_ ev_embed *w)
2189	{	2369	{
2190	if (expect_false (ev_is_active (w)))	2370	if (expect_false (ev_is_active (w)))
2191	return;	2371	return;
2192		2372
2193	{	2373	{
2194	struct ev_loop *loop = w->loop;	2374	struct ev_loop *loop = w->other;
2195	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2375	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2196	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2376	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2197	}	2377	}
2198		2378
2199	ev_set_priority (&w->io, ev_priority (w));	2379	ev_set_priority (&w->io, ev_priority (w));
2200	ev_io_start (EV_A_ &w->io);	2380	ev_io_start (EV_A_ &w->io);
2201		2381
		2382	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2383	ev_set_priority (&w->prepare, EV_MINPRI);
		2384	ev_prepare_start (EV_A_ &w->prepare);
		2385
		2386	/ev_idle_init (&w->idle, e,bed_idle_cb);/
		2387
2202	ev_start (EV_A_ (W)w, 1);	2388	ev_start (EV_A_ (W)w, 1);
2203	}	2389	}
2204		2390
2205	void	2391	void
2206	ev_embed_stop (EV_P_ ev_embed *w)	2392	ev_embed_stop (EV_P_ ev_embed *w)
…		…
2208	clear_pending (EV_A_ (W)w);	2394	clear_pending (EV_A_ (W)w);
2209	if (expect_false (!ev_is_active (w)))	2395	if (expect_false (!ev_is_active (w)))
2210	return;	2396	return;
2211		2397
2212	ev_io_stop (EV_A_ &w->io);	2398	ev_io_stop (EV_A_ &w->io);
		2399	ev_prepare_stop (EV_A_ &w->prepare);
2213		2400
2214	ev_stop (EV_A_ (W)w);	2401	ev_stop (EV_A_ (W)w);
2215	}	2402	}
2216	#endif	2403	#endif
2217		2404
…		…
2242		2429
2243	ev_stop (EV_A_ (W)w);	2430	ev_stop (EV_A_ (W)w);
2244	}	2431	}
2245	#endif	2432	#endif
2246		2433
		2434	#if EV_ASYNC_ENABLE
		2435	void
		2436	ev_async_start (EV_P_ ev_async *w)
		2437	{
		2438	if (expect_false (ev_is_active (w)))
		2439	return;
		2440
		2441	evpipe_init (EV_A);
		2442
		2443	ev_start (EV_A_ (W)w, ++asynccnt);
		2444	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2445	asyncs [asynccnt - 1] = w;
		2446	}
		2447
		2448	void
		2449	ev_async_stop (EV_P_ ev_async *w)
		2450	{
		2451	clear_pending (EV_A_ (W)w);
		2452	if (expect_false (!ev_is_active (w)))
		2453	return;
		2454
		2455	{
		2456	int active = ((W)w)->active;
		2457	asyncs [active - 1] = asyncs [--asynccnt];
		2458	((W)asyncs [active - 1])->active = active;
		2459	}
		2460
		2461	ev_stop (EV_A_ (W)w);
		2462	}
		2463
		2464	void
		2465	ev_async_send (EV_P_ ev_async *w)
		2466	{
		2467	w->sent = 1;
		2468	evpipe_write (EV_A_ 0, 1);
		2469	}
		2470	#endif
		2471
2247	/*****************************************************************************/	2472	/*****************************************************************************/
2248		2473
2249	struct ev_once	2474	struct ev_once
2250	{	2475	{
2251	ev_io io;	2476	ev_io io;
…		…
2306	ev_timer_set (&once->to, timeout, 0.);	2531	ev_timer_set (&once->to, timeout, 0.);
2307	ev_timer_start (EV_A_ &once->to);	2532	ev_timer_start (EV_A_ &once->to);
2308	}	2533	}
2309	}	2534	}
2310		2535
		2536	#if EV_MULTIPLICITY
		2537	#include "ev_wrap.h"
		2538	#endif
		2539
2311	#ifdef __cplusplus	2540	#ifdef __cplusplus
2312	}	2541	}
2313	#endif	2542	#endif
2314		2543

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Comparing libev/ev.c (file contents): Revision 1.182 by root, Wed Dec 12 01:27:08 2007 UTC vs. Revision 1.209 by root, Tue Feb 5 23:56:33 2008 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.182 by root, Wed Dec 12 01:27:08 2007 UTC vs.
Revision 1.209 by root, Tue Feb 5 23:56:33 2008 UTC