[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 1.211 by root, Tue Feb 19 17:09:28 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, int flags)	630	fd_change (EV_P_ int fd, int flags)
563	{	631	{
564	unsigned char reify = anfds [fd].reify;	632	unsigned char reify = anfds [fd].reify;
565	anfds [fd].reify \|= flags \| 1;	633	anfds [fd].reify \|= flags;
566		634
567	if (expect_true (!reify))	635	if (expect_true (!reify))
568	{	636	{
569	++fdchangecnt;	637	++fdchangecnt;
570	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
…		…
628		696
629	for (fd = 0; fd < anfdmax; ++fd)	697	for (fd = 0; fd < anfdmax; ++fd)
630	if (anfds [fd].events)	698	if (anfds [fd].events)
631	{	699	{
632	anfds [fd].events = 0;	700	anfds [fd].events = 0;
633	fd_change (EV_A_ fd, EV_IOFDSET);	701	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
634	}	702	}
635	}	703	}
636		704
637	/*****************************************************************************/	705	/*****************************************************************************/
638		706
…		…
695	/*****************************************************************************/	763	/*****************************************************************************/
696		764
697	typedef struct	765	typedef struct
698	{	766	{
699	WL head;	767	WL head;
700	sig_atomic_t volatile gotsig;	768	EV_ATOMIC_T gotsig;
701	} ANSIG;	769	} ANSIG;
702		770
703	static ANSIG *signals;	771	static ANSIG *signals;
704	static int signalmax;	772	static int signalmax;
705		773
706	static int sigpipe [2];	774	static EV_ATOMIC_T gotsig;
707	static sig_atomic_t volatile gotsig;
708	static ev_io sigev;
709		775
710	void inline_size	776	void inline_size
711	signals_init (ANSIG *base, int count)	777	signals_init (ANSIG *base, int count)
712	{	778	{
713	while (count--)	779	while (count--)
…		…
717		783
718	++base;	784	++base;
719	}	785	}
720	}	786	}
721		787
722	static void	788	/*****************************************************************************/
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		789
773	void inline_speed	790	void inline_speed
774	fd_intern (int fd)	791	fd_intern (int fd)
775	{	792	{
776	#ifdef _WIN32	793	#ifdef _WIN32
…		…
781	fcntl (fd, F_SETFL, O_NONBLOCK);	798	fcntl (fd, F_SETFL, O_NONBLOCK);
782	#endif	799	#endif
783	}	800	}
784		801
785	static void noinline	802	static void noinline
786	siginit (EV_P)	803	evpipe_init (EV_P)
787	{	804	{
		805	if (!ev_is_active (&pipeev))
		806	{
		807	while (pipe (evpipe))
		808	syserr ("(libev) error creating signal/async pipe");
		809
788	fd_intern (sigpipe [0]);	810	fd_intern (evpipe [0]);
789	fd_intern (sigpipe [1]);	811	fd_intern (evpipe [1]);
790		812
791	ev_io_set (&sigev, sigpipe [0], EV_READ);	813	ev_io_set (&pipeev, evpipe [0], EV_READ);
792	ev_io_start (EV_A_ &sigev);	814	ev_io_start (EV_A_ &pipeev);
793	ev_unref (EV_A); /* child watcher should not keep loop alive */	815	ev_unref (EV_A); /* watcher should not keep loop alive */
		816
		817	/* in case we received the signal before we had the chance of installing a handler */
		818	ev_feed_event (EV_A_ &pipeev, 0);
		819	}
		820	}
		821
		822	void inline_size
		823	evpipe_write (EV_P_ int sig, int async)
		824	{
		825	if (!(gotasync \|\| gotsig))
		826	{
		827	int old_errno = errno; /* save errno becaue write might clobber it */
		828
		829	if (sig) gotsig = 1;
		830	if (async) gotasync = 1;
		831
		832	write (evpipe [1], &old_errno, 1);
		833
		834	errno = old_errno;
		835	}
		836	}
		837
		838	static void
		839	pipecb (EV_P_ ev_io *iow, int revents)
		840	{
		841	{
		842	int dummy;
		843	read (evpipe [0], &dummy, 1);
		844	}
		845
		846	if (gotsig && ev_is_default_loop (EV_A))
		847	{
		848	int signum;
		849	gotsig = 0;
		850
		851	for (signum = signalmax; signum--; )
		852	if (signals [signum].gotsig)
		853	ev_feed_signal_event (EV_A_ signum + 1);
		854	}
		855
		856	#if EV_ASYNC_ENABLE
		857	if (gotasync)
		858	{
		859	int i;
		860	gotasync = 0;
		861
		862	for (i = asynccnt; i--; )
		863	if (asyncs [i]->sent)
		864	{
		865	asyncs [i]->sent = 0;
		866	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		867	}
		868	}
		869	#endif
794	}	870	}
795		871
796	/*****************************************************************************/	872	/*****************************************************************************/
797		873
		874	static void
		875	sighandler (int signum)
		876	{
		877	#if EV_MULTIPLICITY
		878	struct ev_loop *loop = &default_loop_struct;
		879	#endif
		880
		881	#if _WIN32
		882	signal (signum, sighandler);
		883	#endif
		884
		885	signals [signum - 1].gotsig = 1;
		886	evpipe_write (EV_A_ 1, 0);
		887	}
		888
		889	void noinline
		890	ev_feed_signal_event (EV_P_ int signum)
		891	{
		892	WL w;
		893
		894	#if EV_MULTIPLICITY
		895	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		896	#endif
		897
		898	--signum;
		899
		900	if (signum < 0 \|\| signum >= signalmax)
		901	return;
		902
		903	signals [signum].gotsig = 0;
		904
		905	for (w = signals [signum].head; w; w = w->next)
		906	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		907	}
		908
		909	/*****************************************************************************/
		910
798	static WL childs [EV_PID_HASHSIZE];	911	static WL childs [EV_PID_HASHSIZE];
799		912
800	#ifndef _WIN32	913	#ifndef _WIN32
801		914
802	static ev_signal childev;	915	static ev_signal childev;
		916
		917	#ifndef WIFCONTINUED
		918	# define WIFCONTINUED(status) 0
		919	#endif
803		920
804	void inline_speed	921	void inline_speed
805	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	922	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
806	{	923	{
807	ev_child *w;	924	ev_child *w;
		925	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
808		926
809	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	927	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		928	{
810	if (w->pid == pid \|\| !w->pid)	929	if ((w->pid == pid \|\| !w->pid)
		930	&& (!traced \|\| (w->flags & 1)))
811	{	931	{
812	ev_set_priority (w, ev_priority (sw)); /* need to do it now */	932	ev_set_priority (w, ev_priority (sw)); /* need to do it now */
813	w->rpid = pid;	933	w->rpid = pid;
814	w->rstatus = status;	934	w->rstatus = status;
815	ev_feed_event (EV_A_ (W)w, EV_CHILD);	935	ev_feed_event (EV_A_ (W)w, EV_CHILD);
816	}	936	}
		937	}
817	}	938	}
818		939
819	#ifndef WCONTINUED	940	#ifndef WCONTINUED
820	# define WCONTINUED 0	941	# define WCONTINUED 0
821	#endif	942	#endif
…		…
918	}	1039	}
919		1040
920	unsigned int	1041	unsigned int
921	ev_embeddable_backends (void)	1042	ev_embeddable_backends (void)
922	{	1043	{
923	return EVBACKEND_EPOLL	1044	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
924	\| EVBACKEND_KQUEUE	1045
925	\| EVBACKEND_PORT;	1046	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1047	/* please fix it and tell me how to detect the fix */
		1048	flags &= ~EVBACKEND_EPOLL;
		1049
		1050	return flags;
926	}	1051	}
927		1052
928	unsigned int	1053	unsigned int
929	ev_backend (EV_P)	1054	ev_backend (EV_P)
930	{	1055	{
…		…
933		1058
934	unsigned int	1059	unsigned int
935	ev_loop_count (EV_P)	1060	ev_loop_count (EV_P)
936	{	1061	{
937	return loop_count;	1062	return loop_count;
		1063	}
		1064
		1065	void
		1066	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1067	{
		1068	io_blocktime = interval;
		1069	}
		1070
		1071	void
		1072	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1073	{
		1074	timeout_blocktime = interval;
938	}	1075	}
939		1076
940	static void noinline	1077	static void noinline
941	loop_init (EV_P_ unsigned int flags)	1078	loop_init (EV_P_ unsigned int flags)
942	{	1079	{
…		…
948	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1085	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
949	have_monotonic = 1;	1086	have_monotonic = 1;
950	}	1087	}
951	#endif	1088	#endif
952		1089
953	ev_rt_now = ev_time ();	1090	ev_rt_now = ev_time ();
954	mn_now = get_clock ();	1091	mn_now = get_clock ();
955	now_floor = mn_now;	1092	now_floor = mn_now;
956	rtmn_diff = ev_rt_now - mn_now;	1093	rtmn_diff = ev_rt_now - mn_now;
		1094
		1095	io_blocktime = 0.;
		1096	timeout_blocktime = 0.;
		1097	backend = 0;
		1098	backend_fd = -1;
		1099	gotasync = 0;
		1100	#if EV_USE_INOTIFY
		1101	fs_fd = -2;
		1102	#endif
957		1103
958	/* pid check not overridable via env */	1104	/* pid check not overridable via env */
959	#ifndef _WIN32	1105	#ifndef _WIN32
960	if (flags & EVFLAG_FORKCHECK)	1106	if (flags & EVFLAG_FORKCHECK)
961	curpid = getpid ();	1107	curpid = getpid ();
…		…
967	flags = atoi (getenv ("LIBEV_FLAGS"));	1113	flags = atoi (getenv ("LIBEV_FLAGS"));
968		1114
969	if (!(flags & 0x0000ffffUL))	1115	if (!(flags & 0x0000ffffUL))
970	flags \|= ev_recommended_backends ();	1116	flags \|= ev_recommended_backends ();
971		1117
972	backend = 0;
973	backend_fd = -1;
974	#if EV_USE_INOTIFY
975	fs_fd = -2;
976	#endif
977
978	#if EV_USE_PORT	1118	#if EV_USE_PORT
979	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1119	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
980	#endif	1120	#endif
981	#if EV_USE_KQUEUE	1121	#if EV_USE_KQUEUE
982	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1122	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
989	#endif	1129	#endif
990	#if EV_USE_SELECT	1130	#if EV_USE_SELECT
991	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1131	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
992	#endif	1132	#endif
993		1133
994	ev_init (&sigev, sigcb);	1134	ev_init (&pipeev, pipecb);
995	ev_set_priority (&sigev, EV_MAXPRI);	1135	ev_set_priority (&pipeev, EV_MAXPRI);
996	}	1136	}
997	}	1137	}
998		1138
999	static void noinline	1139	static void noinline
1000	loop_destroy (EV_P)	1140	loop_destroy (EV_P)
1001	{	1141	{
1002	int i;	1142	int i;
		1143
		1144	if (ev_is_active (&pipeev))
		1145	{
		1146	ev_ref (EV_A); /* signal watcher */
		1147	ev_io_stop (EV_A_ &pipeev);
		1148
		1149	close (evpipe [0]); evpipe [0] = 0;
		1150	close (evpipe [1]); evpipe [1] = 0;
		1151	}
1003		1152
1004	#if EV_USE_INOTIFY	1153	#if EV_USE_INOTIFY
1005	if (fs_fd >= 0)	1154	if (fs_fd >= 0)
1006	close (fs_fd);	1155	close (fs_fd);
1007	#endif	1156	#endif
…		…
1030	array_free (pending, [i]);	1179	array_free (pending, [i]);
1031	#if EV_IDLE_ENABLE	1180	#if EV_IDLE_ENABLE
1032	array_free (idle, [i]);	1181	array_free (idle, [i]);
1033	#endif	1182	#endif
1034	}	1183	}
		1184
		1185	ev_free (anfds); anfdmax = 0;
1035		1186
1036	/* have to use the microsoft-never-gets-it-right macro */	1187	/* have to use the microsoft-never-gets-it-right macro */
1037	array_free (fdchange, EMPTY);	1188	array_free (fdchange, EMPTY);
1038	array_free (timer, EMPTY);	1189	array_free (timer, EMPTY);
1039	#if EV_PERIODIC_ENABLE	1190	#if EV_PERIODIC_ENABLE
1040	array_free (periodic, EMPTY);	1191	array_free (periodic, EMPTY);
1041	#endif	1192	#endif
		1193	#if EV_FORK_ENABLE
		1194	array_free (fork, EMPTY);
		1195	#endif
1042	array_free (prepare, EMPTY);	1196	array_free (prepare, EMPTY);
1043	array_free (check, EMPTY);	1197	array_free (check, EMPTY);
		1198	#if EV_ASYNC_ENABLE
		1199	array_free (async, EMPTY);
		1200	#endif
1044		1201
1045	backend = 0;	1202	backend = 0;
1046	}	1203	}
1047		1204
1048	void inline_size infy_fork (EV_P);	1205	void inline_size infy_fork (EV_P);
…		…
1061	#endif	1218	#endif
1062	#if EV_USE_INOTIFY	1219	#if EV_USE_INOTIFY
1063	infy_fork (EV_A);	1220	infy_fork (EV_A);
1064	#endif	1221	#endif
1065		1222
1066	if (ev_is_active (&sigev))	1223	if (ev_is_active (&pipeev))
1067	{	1224	{
1068	/* default loop */	1225	/* this "locks" the handlers against writing to the pipe */
		1226	gotsig = gotasync = 1;
1069		1227
1070	ev_ref (EV_A);	1228	ev_ref (EV_A);
1071	ev_io_stop (EV_A_ &sigev);	1229	ev_io_stop (EV_A_ &pipeev);
1072	close (sigpipe [0]);	1230	close (evpipe [0]);
1073	close (sigpipe [1]);	1231	close (evpipe [1]);
1074		1232
1075	while (pipe (sigpipe))
1076	syserr ("(libev) error creating pipe");
1077
1078	siginit (EV_A);	1233	evpipe_init (EV_A);
		1234	/* now iterate over everything, in case we missed something */
		1235	pipecb (EV_A_ &pipeev, EV_READ);
1079	}	1236	}
1080		1237
1081	postfork = 0;	1238	postfork = 0;
1082	}	1239	}
1083		1240
…		…
1105	}	1262	}
1106		1263
1107	void	1264	void
1108	ev_loop_fork (EV_P)	1265	ev_loop_fork (EV_P)
1109	{	1266	{
1110	postfork = 1;	1267	postfork = 1; /* must be in line with ev_default_fork */
1111	}	1268	}
1112		1269
1113	#endif	1270	#endif
1114		1271
1115	#if EV_MULTIPLICITY	1272	#if EV_MULTIPLICITY
…		…
1118	#else	1275	#else
1119	int	1276	int
1120	ev_default_loop (unsigned int flags)	1277	ev_default_loop (unsigned int flags)
1121	#endif	1278	#endif
1122	{	1279	{
1123	if (sigpipe [0] == sigpipe [1])
1124	if (pipe (sigpipe))
1125	return 0;
1126
1127	if (!ev_default_loop_ptr)	1280	if (!ev_default_loop_ptr)
1128	{	1281	{
1129	#if EV_MULTIPLICITY	1282	#if EV_MULTIPLICITY
1130	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1283	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1131	#else	1284	#else
…		…
1134		1287
1135	loop_init (EV_A_ flags);	1288	loop_init (EV_A_ flags);
1136		1289
1137	if (ev_backend (EV_A))	1290	if (ev_backend (EV_A))
1138	{	1291	{
1139	siginit (EV_A);
1140
1141	#ifndef _WIN32	1292	#ifndef _WIN32
1142	ev_signal_init (&childev, childcb, SIGCHLD);	1293	ev_signal_init (&childev, childcb, SIGCHLD);
1143	ev_set_priority (&childev, EV_MAXPRI);	1294	ev_set_priority (&childev, EV_MAXPRI);
1144	ev_signal_start (EV_A_ &childev);	1295	ev_signal_start (EV_A_ &childev);
1145	ev_unref (EV_A); /* child watcher should not keep loop alive */	1296	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1162	#ifndef _WIN32	1313	#ifndef _WIN32
1163	ev_ref (EV_A); /* child watcher */	1314	ev_ref (EV_A); /* child watcher */
1164	ev_signal_stop (EV_A_ &childev);	1315	ev_signal_stop (EV_A_ &childev);
1165	#endif	1316	#endif
1166		1317
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);	1318	loop_destroy (EV_A);
1174	}	1319	}
1175		1320
1176	void	1321	void
1177	ev_default_fork (void)	1322	ev_default_fork (void)
…		…
1179	#if EV_MULTIPLICITY	1324	#if EV_MULTIPLICITY
1180	struct ev_loop *loop = ev_default_loop_ptr;	1325	struct ev_loop *loop = ev_default_loop_ptr;
1181	#endif	1326	#endif
1182		1327
1183	if (backend)	1328	if (backend)
1184	postfork = 1;	1329	postfork = 1; /* must be in line with ev_loop_fork */
1185	}	1330	}
1186		1331
1187	/*****************************************************************************/	1332	/*****************************************************************************/
1188		1333
1189	void	1334	void
…		…
1444	/* update fd-related kernel structures */	1589	/* update fd-related kernel structures */
1445	fd_reify (EV_A);	1590	fd_reify (EV_A);
1446		1591
1447	/* calculate blocking time */	1592	/* calculate blocking time */
1448	{	1593	{
1449	ev_tstamp block;	1594	ev_tstamp waittime = 0.;
		1595	ev_tstamp sleeptime = 0.;
1450		1596
1451	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))	1597	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1452	block = 0.; /* do not block at all */
1453	else
1454	{	1598	{
1455	/* update time to cancel out callback processing overhead */	1599	/* update time to cancel out callback processing overhead */
1456	time_update (EV_A_ 1e100);	1600	time_update (EV_A_ 1e100);
1457		1601
1458	block = MAX_BLOCKTIME;	1602	waittime = MAX_BLOCKTIME;
1459		1603
1460	if (timercnt)	1604	if (timercnt)
1461	{	1605	{
1462	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1606	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1463	if (block > to) block = to;	1607	if (waittime > to) waittime = to;
1464	}	1608	}
1465		1609
1466	#if EV_PERIODIC_ENABLE	1610	#if EV_PERIODIC_ENABLE
1467	if (periodiccnt)	1611	if (periodiccnt)
1468	{	1612	{
1469	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1613	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1470	if (block > to) block = to;	1614	if (waittime > to) waittime = to;
1471	}	1615	}
1472	#endif	1616	#endif
1473		1617
1474	if (expect_false (block < 0.)) block = 0.;	1618	if (expect_false (waittime < timeout_blocktime))
		1619	waittime = timeout_blocktime;
		1620
		1621	sleeptime = waittime - backend_fudge;
		1622
		1623	if (expect_true (sleeptime > io_blocktime))
		1624	sleeptime = io_blocktime;
		1625
		1626	if (sleeptime)
		1627	{
		1628	ev_sleep (sleeptime);
		1629	waittime -= sleeptime;
		1630	}
1475	}	1631	}
1476		1632
1477	++loop_count;	1633	++loop_count;
1478	backend_poll (EV_A_ block);	1634	backend_poll (EV_A_ waittime);
1479		1635
1480	/* update ev_rt_now, do magic */	1636	/* update ev_rt_now, do magic */
1481	time_update (EV_A_ block);	1637	time_update (EV_A_ waittime + sleeptime);
1482	}	1638	}
1483		1639
1484	/* queue pending timers and reschedule them */	1640	/* queue pending timers and reschedule them */
1485	timers_reify (EV_A); /* relative timers called last */	1641	timers_reify (EV_A); /* relative timers called last */
1486	#if EV_PERIODIC_ENABLE	1642	#if EV_PERIODIC_ENABLE
…		…
1600		1756
1601	ev_start (EV_A_ (W)w, 1);	1757	ev_start (EV_A_ (W)w, 1);
1602	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1758	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1603	wlist_add (&anfds[fd].head, (WL)w);	1759	wlist_add (&anfds[fd].head, (WL)w);
1604		1760
1605	fd_change (EV_A_ fd, w->events & EV_IOFDSET);	1761	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
1606	w->events &= ~ EV_IOFDSET;	1762	w->events &= ~EV_IOFDSET;
1607	}	1763	}
1608		1764
1609	void noinline	1765	void noinline
1610	ev_io_stop (EV_P_ ev_io *w)	1766	ev_io_stop (EV_P_ ev_io *w)
1611	{	1767	{
…		…
1616	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));
1617		1773
1618	wlist_del (&anfds[w->fd].head, (WL)w);	1774	wlist_del (&anfds[w->fd].head, (WL)w);
1619	ev_stop (EV_A_ (W)w);	1775	ev_stop (EV_A_ (W)w);
1620		1776
1621	fd_change (EV_A_ w->fd, 0);	1777	fd_change (EV_A_ w->fd, 1);
1622	}	1778	}
1623		1779
1624	void noinline	1780	void noinline
1625	ev_timer_start (EV_P_ ev_timer *w)	1781	ev_timer_start (EV_P_ ev_timer *w)
1626	{	1782	{
…		…
1752	#endif	1908	#endif
1753	if (expect_false (ev_is_active (w)))	1909	if (expect_false (ev_is_active (w)))
1754	return;	1910	return;
1755		1911
1756	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));
		1913
		1914	evpipe_init (EV_A);
1757		1915
1758	{	1916	{
1759	#ifndef _WIN32	1917	#ifndef _WIN32
1760	sigset_t full, prev;	1918	sigset_t full, prev;
1761	sigfillset (&full);	1919	sigfillset (&full);
…		…
2170		2328
2171	#if EV_EMBED_ENABLE	2329	#if EV_EMBED_ENABLE
2172	void noinline	2330	void noinline
2173	ev_embed_sweep (EV_P_ ev_embed *w)	2331	ev_embed_sweep (EV_P_ ev_embed *w)
2174	{	2332	{
2175	ev_loop (w->loop, EVLOOP_NONBLOCK);	2333	ev_loop (w->other, EVLOOP_NONBLOCK);
2176	}	2334	}
2177		2335
2178	static void	2336	static void
2179	embed_cb (EV_P_ ev_io *io, int revents)	2337	embed_io_cb (EV_P_ ev_io *io, int revents)
2180	{	2338	{
2181	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2339	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
2182		2340
2183	if (ev_cb (w))	2341	if (ev_cb (w))
2184	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2342	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2185	else	2343	else
2186	ev_embed_sweep (loop, w);	2344	ev_loop (w->other, EVLOOP_NONBLOCK);
2187	}	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
2188		2370
2189	void	2371	void
2190	ev_embed_start (EV_P_ ev_embed *w)	2372	ev_embed_start (EV_P_ ev_embed *w)
2191	{	2373	{
2192	if (expect_false (ev_is_active (w)))	2374	if (expect_false (ev_is_active (w)))
2193	return;	2375	return;
2194		2376
2195	{	2377	{
2196	struct ev_loop *loop = w->loop;	2378	struct ev_loop *loop = w->other;
2197	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 ()));
2198	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2380	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2199	}	2381	}
2200		2382
2201	ev_set_priority (&w->io, ev_priority (w));	2383	ev_set_priority (&w->io, ev_priority (w));
2202	ev_io_start (EV_A_ &w->io);	2384	ev_io_start (EV_A_ &w->io);
2203		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
2204	ev_start (EV_A_ (W)w, 1);	2392	ev_start (EV_A_ (W)w, 1);
2205	}	2393	}
2206		2394
2207	void	2395	void
2208	ev_embed_stop (EV_P_ ev_embed *w)	2396	ev_embed_stop (EV_P_ ev_embed *w)
…		…
2210	clear_pending (EV_A_ (W)w);	2398	clear_pending (EV_A_ (W)w);
2211	if (expect_false (!ev_is_active (w)))	2399	if (expect_false (!ev_is_active (w)))
2212	return;	2400	return;
2213		2401
2214	ev_io_stop (EV_A_ &w->io);	2402	ev_io_stop (EV_A_ &w->io);
		2403	ev_prepare_stop (EV_A_ &w->prepare);
2215		2404
2216	ev_stop (EV_A_ (W)w);	2405	ev_stop (EV_A_ (W)w);
2217	}	2406	}
2218	#endif	2407	#endif
2219		2408
…		…
2244		2433
2245	ev_stop (EV_A_ (W)w);	2434	ev_stop (EV_A_ (W)w);
2246	}	2435	}
2247	#endif	2436	#endif
2248		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_ 0, 1);
		2473	}
		2474	#endif
		2475
2249	/*****************************************************************************/	2476	/*****************************************************************************/
2250		2477
2251	struct ev_once	2478	struct ev_once
2252	{	2479	{
2253	ev_io io;	2480	ev_io io;
…		…
2308	ev_timer_set (&once->to, timeout, 0.);	2535	ev_timer_set (&once->to, timeout, 0.);
2309	ev_timer_start (EV_A_ &once->to);	2536	ev_timer_start (EV_A_ &once->to);
2310	}	2537	}
2311	}	2538	}
2312		2539
		2540	#if EV_MULTIPLICITY
		2541	#include "ev_wrap.h"
		2542	#endif
		2543
2313	#ifdef __cplusplus	2544	#ifdef __cplusplus
2314	}	2545	}
2315	#endif	2546	#endif
2316		2547

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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 1.211 by root, Tue Feb 19 17:09:28 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 1.211 by root, Tue Feb 19 17:09:28 2008 UTC