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

Comparing libev/ev.c (file contents):
Revision 1.282 by root, Sat Mar 28 22:17:17 2009 UTC vs.
Revision 1.301 by root, Wed Jul 15 16:58:53 2009 UTC

…		…
57	# endif	57	# endif
58	# ifndef EV_USE_MONOTONIC	58	# ifndef EV_USE_MONOTONIC
59	# define EV_USE_MONOTONIC 1	59	# define EV_USE_MONOTONIC 1
60	# endif	60	# endif
61	# endif	61	# endif
		62	# elif !defined(EV_USE_CLOCK_SYSCALL)
		63	# define EV_USE_CLOCK_SYSCALL 0
62	# endif	64	# endif
63		65
64	# if HAVE_CLOCK_GETTIME	66	# if HAVE_CLOCK_GETTIME
65	# ifndef EV_USE_MONOTONIC	67	# ifndef EV_USE_MONOTONIC
66	# define EV_USE_MONOTONIC 1	68	# define EV_USE_MONOTONIC 1
…		…
282		284
283	#ifndef EV_HEAP_CACHE_AT	285	#ifndef EV_HEAP_CACHE_AT
284	# define EV_HEAP_CACHE_AT !EV_MINIMAL	286	# define EV_HEAP_CACHE_AT !EV_MINIMAL
285	#endif	287	#endif
286		288
		289	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		290	/* which makes programs even slower. might work on other unices, too. */
		291	#if EV_USE_CLOCK_SYSCALL
		292	# include <syscall.h>
		293	# ifdef SYS_clock_gettime
		294	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		295	# undef EV_USE_MONOTONIC
		296	# define EV_USE_MONOTONIC 1
		297	# else
		298	# undef EV_USE_CLOCK_SYSCALL
		299	# define EV_USE_CLOCK_SYSCALL 0
		300	# endif
		301	#endif
		302
287	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	303	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288		304
289	#ifndef CLOCK_MONOTONIC	305	#ifndef CLOCK_MONOTONIC
290	# undef EV_USE_MONOTONIC	306	# undef EV_USE_MONOTONIC
291	# define EV_USE_MONOTONIC 0	307	# define EV_USE_MONOTONIC 0
…		…
320		336
321	#if EV_SELECT_IS_WINSOCKET	337	#if EV_SELECT_IS_WINSOCKET
322	# include <winsock.h>	338	# include <winsock.h>
323	#endif	339	#endif
324		340
325	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326	/* which makes programs even slower. might work on other unices, too. */
327	#if EV_USE_CLOCK_SYSCALL
328	# include <syscall.h>
329	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330	# undef EV_USE_MONOTONIC
331	# define EV_USE_MONOTONIC 1
332	#endif
333
334	#if EV_USE_EVENTFD	341	#if EV_USE_EVENTFD
335	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	342	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336	# include <stdint.h>	343	# include <stdint.h>
337	# ifdef __cplusplus	344	# ifdef __cplusplus
338	extern "C" {	345	extern "C" {
…		…
384	# define inline_speed static noinline	391	# define inline_speed static noinline
385	#else	392	#else
386	# define inline_speed static inline	393	# define inline_speed static inline
387	#endif	394	#endif
388		395
389	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	396	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		397
		398	#if EV_MINPRI == EV_MAXPRI
		399	# define ABSPRI(w) (((W)w), 0)
		400	#else
390	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	401	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		402	#endif
391		403
392	#define EMPTY /* required for microsofts broken pseudo-c compiler */	404	#define EMPTY /* required for microsofts broken pseudo-c compiler */
393	#define EMPTY2(a,b) /* used to suppress some warnings */	405	#define EMPTY2(a,b) /* used to suppress some warnings */
394		406
395	typedef ev_watcher *W;	407	typedef ev_watcher *W;
…		…
478	#define ev_malloc(size) ev_realloc (0, (size))	490	#define ev_malloc(size) ev_realloc (0, (size))
479	#define ev_free(ptr) ev_realloc ((ptr), 0)	491	#define ev_free(ptr) ev_realloc ((ptr), 0)
480		492
481	/*****************************************************************************/	493	/*****************************************************************************/
482		494
		495	/* set in reify when reification needed */
		496	#define EV_ANFD_REIFY 1
		497
		498	/* file descriptor info structure */
483	typedef struct	499	typedef struct
484	{	500	{
485	WL head;	501	WL head;
486	unsigned char events;	502	unsigned char events; /* the events watched for */
487	unsigned char reify;	503	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
488	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	504	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489	unsigned char unused;	505	unsigned char unused;
490	#if EV_USE_EPOLL	506	#if EV_USE_EPOLL
491	unsigned int egen; /* generation counter to counter epoll bugs */	507	unsigned int egen; /* generation counter to counter epoll bugs */
492	#endif	508	#endif
493	#if EV_SELECT_IS_WINSOCKET	509	#if EV_SELECT_IS_WINSOCKET
494	SOCKET handle;	510	SOCKET handle;
495	#endif	511	#endif
496	} ANFD;	512	} ANFD;
497		513
		514	/* stores the pending event set for a given watcher */
498	typedef struct	515	typedef struct
499	{	516	{
500	W w;	517	W w;
501	int events;	518	int events; /* the pending event set for the given watcher */
502	} ANPENDING;	519	} ANPENDING;
503		520
504	#if EV_USE_INOTIFY	521	#if EV_USE_INOTIFY
505	/* hash table entry per inotify-id */	522	/* hash table entry per inotify-id */
506	typedef struct	523	typedef struct
…		…
509	} ANFS;	526	} ANFS;
510	#endif	527	#endif
511		528
512	/* Heap Entry */	529	/* Heap Entry */
513	#if EV_HEAP_CACHE_AT	530	#if EV_HEAP_CACHE_AT
		531	/* a heap element */
514	typedef struct {	532	typedef struct {
515	ev_tstamp at;	533	ev_tstamp at;
516	WT w;	534	WT w;
517	} ANHE;	535	} ANHE;
518		536
519	#define ANHE_w(he) (he).w /* access watcher, read-write */	537	#define ANHE_w(he) (he).w /* access watcher, read-write */
520	#define ANHE_at(he) (he).at /* access cached at, read-only */	538	#define ANHE_at(he) (he).at /* access cached at, read-only */
521	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */	539	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522	#else	540	#else
		541	/* a heap element */
523	typedef WT ANHE;	542	typedef WT ANHE;
524		543
525	#define ANHE_w(he) (he)	544	#define ANHE_w(he) (he)
526	#define ANHE_at(he) (he)->at	545	#define ANHE_at(he) (he)->at
527	#define ANHE_at_cache(he)	546	#define ANHE_at_cache(he)
…		…
551		570
552	static int ev_default_loop_ptr;	571	static int ev_default_loop_ptr;
553		572
554	#endif	573	#endif
555		574
		575	#if EV_MINIMAL < 2
		576	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		577	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		578	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		579	#else
		580	# define EV_RELEASE_CB (void)0
		581	# define EV_ACQUIRE_CB (void)0
		582	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		583	#endif
		584
		585	#define EVUNLOOP_RECURSE 0x80
		586
556	/*****************************************************************************/	587	/*****************************************************************************/
557		588
		589	#ifndef EV_HAVE_EV_TIME
558	ev_tstamp	590	ev_tstamp
559	ev_time (void)	591	ev_time (void)
560	{	592	{
561	#if EV_USE_REALTIME	593	#if EV_USE_REALTIME
562	if (expect_true (have_realtime))	594	if (expect_true (have_realtime))
…		…
569		601
570	struct timeval tv;	602	struct timeval tv;
571	gettimeofday (&tv, 0);	603	gettimeofday (&tv, 0);
572	return tv.tv_sec + tv.tv_usec * 1e-6;	604	return tv.tv_sec + tv.tv_usec * 1e-6;
573	}	605	}
		606	#endif
574		607
575	ev_tstamp inline_size	608	inline_size ev_tstamp
576	get_clock (void)	609	get_clock (void)
577	{	610	{
578	#if EV_USE_MONOTONIC	611	#if EV_USE_MONOTONIC
579	if (expect_true (have_monotonic))	612	if (expect_true (have_monotonic))
580	{	613	{
…		…
614		647
615	tv.tv_sec = (time_t)delay;	648	tv.tv_sec = (time_t)delay;
616	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	649	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617		650
618	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	651	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619	/* somehting nto guaranteed by newer posix versions, but guaranteed */	652	/* somehting not guaranteed by newer posix versions, but guaranteed */
620	/* by older ones */	653	/* by older ones */
621	select (0, 0, 0, 0, &tv);	654	select (0, 0, 0, 0, &tv);
622	#endif	655	#endif
623	}	656	}
624	}	657	}
625		658
626	/*****************************************************************************/	659	/*****************************************************************************/
627		660
628	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	661	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
629		662
630	int inline_size	663	/* find a suitable new size for the given array, */
		664	/* hopefully by rounding to a ncie-to-malloc size */
		665	inline_size int
631	array_nextsize (int elem, int cur, int cnt)	666	array_nextsize (int elem, int cur, int cnt)
632	{	667	{
633	int ncur = cur + 1;	668	int ncur = cur + 1;
634		669
635	do	670	do
…		…
680	#define array_free(stem, idx) \	715	#define array_free(stem, idx) \
681	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0	716	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
682		717
683	/*****************************************************************************/	718	/*****************************************************************************/
684		719
		720	/* dummy callback for pending events */
		721	static void noinline
		722	pendingcb (EV_P_ ev_prepare *w, int revents)
		723	{
		724	}
		725
685	void noinline	726	void noinline
686	ev_feed_event (EV_P_ void *w, int revents)	727	ev_feed_event (EV_P_ void *w, int revents)
687	{	728	{
688	W w_ = (W)w;	729	W w_ = (W)w;
689	int pri = ABSPRI (w_);	730	int pri = ABSPRI (w_);
…		…
697	pendings [pri][w_->pending - 1].w = w_;	738	pendings [pri][w_->pending - 1].w = w_;
698	pendings [pri][w_->pending - 1].events = revents;	739	pendings [pri][w_->pending - 1].events = revents;
699	}	740	}
700	}	741	}
701		742
702	void inline_speed	743	inline_speed void
		744	feed_reverse (EV_P_ W w)
		745	{
		746	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		747	rfeeds [rfeedcnt++] = w;
		748	}
		749
		750	inline_size void
		751	feed_reverse_done (EV_P_ int revents)
		752	{
		753	do
		754	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		755	while (rfeedcnt);
		756	}
		757
		758	inline_speed void
703	queue_events (EV_P_ W *events, int eventcnt, int type)	759	queue_events (EV_P_ W *events, int eventcnt, int type)
704	{	760	{
705	int i;	761	int i;
706		762
707	for (i = 0; i < eventcnt; ++i)	763	for (i = 0; i < eventcnt; ++i)
708	ev_feed_event (EV_A_ events [i], type);	764	ev_feed_event (EV_A_ events [i], type);
709	}	765	}
710		766
711	/*****************************************************************************/	767	/*****************************************************************************/
712		768
713	void inline_speed	769	inline_speed void
714	fd_event (EV_P_ int fd, int revents)	770	fd_event_nc (EV_P_ int fd, int revents)
715	{	771	{
716	ANFD *anfd = anfds + fd;	772	ANFD *anfd = anfds + fd;
717	ev_io *w;	773	ev_io *w;
718		774
719	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	775	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
…		…
723	if (ev)	779	if (ev)
724	ev_feed_event (EV_A_ (W)w, ev);	780	ev_feed_event (EV_A_ (W)w, ev);
725	}	781	}
726	}	782	}
727		783
		784	/* do not submit kernel events for fds that have reify set */
		785	/* because that means they changed while we were polling for new events */
		786	inline_speed void
		787	fd_event (EV_P_ int fd, int revents)
		788	{
		789	ANFD *anfd = anfds + fd;
		790
		791	if (expect_true (!anfd->reify))
		792	fd_event_nc (EV_A_ fd, revents);
		793	}
		794
728	void	795	void
729	ev_feed_fd_event (EV_P_ int fd, int revents)	796	ev_feed_fd_event (EV_P_ int fd, int revents)
730	{	797	{
731	if (fd >= 0 && fd < anfdmax)	798	if (fd >= 0 && fd < anfdmax)
732	fd_event (EV_A_ fd, revents);	799	fd_event_nc (EV_A_ fd, revents);
733	}	800	}
734		801
735	void inline_size	802	/* make sure the external fd watch events are in-sync */
		803	/* with the kernel/libev internal state */
		804	inline_size void
736	fd_reify (EV_P)	805	fd_reify (EV_P)
737	{	806	{
738	int i;	807	int i;
739		808
740	for (i = 0; i < fdchangecnt; ++i)	809	for (i = 0; i < fdchangecnt; ++i)
…		…
774	}	843	}
775		844
776	fdchangecnt = 0;	845	fdchangecnt = 0;
777	}	846	}
778		847
779	void inline_size	848	/* something about the given fd changed */
		849	inline_size void
780	fd_change (EV_P_ int fd, int flags)	850	fd_change (EV_P_ int fd, int flags)
781	{	851	{
782	unsigned char reify = anfds [fd].reify;	852	unsigned char reify = anfds [fd].reify;
783	anfds [fd].reify \|= flags;	853	anfds [fd].reify \|= flags;
784		854
…		…
788	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	858	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
789	fdchanges [fdchangecnt - 1] = fd;	859	fdchanges [fdchangecnt - 1] = fd;
790	}	860	}
791	}	861	}
792		862
793	void inline_speed	863	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		864	inline_speed void
794	fd_kill (EV_P_ int fd)	865	fd_kill (EV_P_ int fd)
795	{	866	{
796	ev_io *w;	867	ev_io *w;
797		868
798	while ((w = (ev_io *)anfds [fd].head))	869	while ((w = (ev_io *)anfds [fd].head))
…		…
800	ev_io_stop (EV_A_ w);	871	ev_io_stop (EV_A_ w);
801	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	872	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
802	}	873	}
803	}	874	}
804		875
805	int inline_size	876	/* check whether the given fd is atcually valid, for error recovery */
		877	inline_size int
806	fd_valid (int fd)	878	fd_valid (int fd)
807	{	879	{
808	#ifdef _WIN32	880	#ifdef _WIN32
809	return _get_osfhandle (fd) != -1;	881	return _get_osfhandle (fd) != -1;
810	#else	882	#else
…		…
847	for (fd = 0; fd < anfdmax; ++fd)	919	for (fd = 0; fd < anfdmax; ++fd)
848	if (anfds [fd].events)	920	if (anfds [fd].events)
849	{	921	{
850	anfds [fd].events = 0;	922	anfds [fd].events = 0;
851	anfds [fd].emask = 0;	923	anfds [fd].emask = 0;
852	fd_change (EV_A_ fd, EV__IOFDSET \| 1);	924	fd_change (EV_A_ fd, EV__IOFDSET \| EV_ANFD_REIFY);
853	}	925	}
854	}	926	}
855		927
856	/*****************************************************************************/	928	/*****************************************************************************/
857		929
…		…
873	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	945	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
874	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	946	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
875	#define UPHEAP_DONE(p,k) ((p) == (k))	947	#define UPHEAP_DONE(p,k) ((p) == (k))
876		948
877	/* away from the root */	949	/* away from the root */
878	void inline_speed	950	inline_speed void
879	downheap (ANHE *heap, int N, int k)	951	downheap (ANHE *heap, int N, int k)
880	{	952	{
881	ANHE he = heap [k];	953	ANHE he = heap [k];
882	ANHE *E = heap + N + HEAP0;	954	ANHE *E = heap + N + HEAP0;
883		955
…		…
923	#define HEAP0 1	995	#define HEAP0 1
924	#define HPARENT(k) ((k) >> 1)	996	#define HPARENT(k) ((k) >> 1)
925	#define UPHEAP_DONE(p,k) (!(p))	997	#define UPHEAP_DONE(p,k) (!(p))
926		998
927	/* away from the root */	999	/* away from the root */
928	void inline_speed	1000	inline_speed void
929	downheap (ANHE *heap, int N, int k)	1001	downheap (ANHE *heap, int N, int k)
930	{	1002	{
931	ANHE he = heap [k];	1003	ANHE he = heap [k];
932		1004
933	for (;;)	1005	for (;;)
…		…
953	ev_active (ANHE_w (he)) = k;	1025	ev_active (ANHE_w (he)) = k;
954	}	1026	}
955	#endif	1027	#endif
956		1028
957	/* towards the root */	1029	/* towards the root */
958	void inline_speed	1030	inline_speed void
959	upheap (ANHE *heap, int k)	1031	upheap (ANHE *heap, int k)
960	{	1032	{
961	ANHE he = heap [k];	1033	ANHE he = heap [k];
962		1034
963	for (;;)	1035	for (;;)
…		…
974		1046
975	heap [k] = he;	1047	heap [k] = he;
976	ev_active (ANHE_w (he)) = k;	1048	ev_active (ANHE_w (he)) = k;
977	}	1049	}
978		1050
979	void inline_size	1051	/* move an element suitably so it is in a correct place */
		1052	inline_size void
980	adjustheap (ANHE *heap, int N, int k)	1053	adjustheap (ANHE *heap, int N, int k)
981	{	1054	{
982	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1055	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
983	upheap (heap, k);	1056	upheap (heap, k);
984	else	1057	else
985	downheap (heap, N, k);	1058	downheap (heap, N, k);
986	}	1059	}
987		1060
988	/* rebuild the heap: this function is used only once and executed rarely */	1061	/* rebuild the heap: this function is used only once and executed rarely */
989	void inline_size	1062	inline_size void
990	reheap (ANHE *heap, int N)	1063	reheap (ANHE *heap, int N)
991	{	1064	{
992	int i;	1065	int i;
993		1066
994	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1067	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
997	upheap (heap, i + HEAP0);	1070	upheap (heap, i + HEAP0);
998	}	1071	}
999		1072
1000	/*****************************************************************************/	1073	/*****************************************************************************/
1001		1074
		1075	/* associate signal watchers to a signal signal */
1002	typedef struct	1076	typedef struct
1003	{	1077	{
1004	WL head;	1078	WL head;
1005	EV_ATOMIC_T gotsig;	1079	EV_ATOMIC_T gotsig;
1006	} ANSIG;	1080	} ANSIG;
…		…
1010		1084
1011	static EV_ATOMIC_T gotsig;	1085	static EV_ATOMIC_T gotsig;
1012		1086
1013	/*****************************************************************************/	1087	/*****************************************************************************/
1014		1088
1015	void inline_speed	1089	/* used to prepare libev internal fd's */
		1090	/* this is not fork-safe */
		1091	inline_speed void
1016	fd_intern (int fd)	1092	fd_intern (int fd)
1017	{	1093	{
1018	#ifdef _WIN32	1094	#ifdef _WIN32
1019	unsigned long arg = 1;	1095	unsigned long arg = 1;
1020	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1096	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
1025	}	1101	}
1026		1102
1027	static void noinline	1103	static void noinline
1028	evpipe_init (EV_P)	1104	evpipe_init (EV_P)
1029	{	1105	{
1030	if (!ev_is_active (&pipeev))	1106	if (!ev_is_active (&pipe_w))
1031	{	1107	{
1032	#if EV_USE_EVENTFD	1108	#if EV_USE_EVENTFD
1033	if ((evfd = eventfd (0, 0)) >= 0)	1109	if ((evfd = eventfd (0, 0)) >= 0)
1034	{	1110	{
1035	evpipe [0] = -1;	1111	evpipe [0] = -1;
1036	fd_intern (evfd);	1112	fd_intern (evfd);
1037	ev_io_set (&pipeev, evfd, EV_READ);	1113	ev_io_set (&pipe_w, evfd, EV_READ);
1038	}	1114	}
1039	else	1115	else
1040	#endif	1116	#endif
1041	{	1117	{
1042	while (pipe (evpipe))	1118	while (pipe (evpipe))
1043	ev_syserr ("(libev) error creating signal/async pipe");	1119	ev_syserr ("(libev) error creating signal/async pipe");
1044		1120
1045	fd_intern (evpipe [0]);	1121	fd_intern (evpipe [0]);
1046	fd_intern (evpipe [1]);	1122	fd_intern (evpipe [1]);
1047	ev_io_set (&pipeev, evpipe [0], EV_READ);	1123	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1048	}	1124	}
1049		1125
1050	ev_io_start (EV_A_ &pipeev);	1126	ev_io_start (EV_A_ &pipe_w);
1051	ev_unref (EV_A); /* watcher should not keep loop alive */	1127	ev_unref (EV_A); /* watcher should not keep loop alive */
1052	}	1128	}
1053	}	1129	}
1054		1130
1055	void inline_size	1131	inline_size void
1056	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1132	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1057	{	1133	{
1058	if (!*flag)	1134	if (!*flag)
1059	{	1135	{
1060	int old_errno = errno; /* save errno because write might clobber it */	1136	int old_errno = errno; /* save errno because write might clobber it */
…		…
1073		1149
1074	errno = old_errno;	1150	errno = old_errno;
1075	}	1151	}
1076	}	1152	}
1077		1153
		1154	/* called whenever the libev signal pipe */
		1155	/* got some events (signal, async) */
1078	static void	1156	static void
1079	pipecb (EV_P_ ev_io *iow, int revents)	1157	pipecb (EV_P_ ev_io *iow, int revents)
1080	{	1158	{
1081	#if EV_USE_EVENTFD	1159	#if EV_USE_EVENTFD
1082	if (evfd >= 0)	1160	if (evfd >= 0)
…		…
1164		1242
1165	#ifndef WIFCONTINUED	1243	#ifndef WIFCONTINUED
1166	# define WIFCONTINUED(status) 0	1244	# define WIFCONTINUED(status) 0
1167	#endif	1245	#endif
1168		1246
1169	void inline_speed	1247	/* handle a single child status event */
		1248	inline_speed void
1170	child_reap (EV_P_ int chain, int pid, int status)	1249	child_reap (EV_P_ int chain, int pid, int status)
1171	{	1250	{
1172	ev_child *w;	1251	ev_child *w;
1173	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);	1252	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
1174		1253
…		…
1187		1266
1188	#ifndef WCONTINUED	1267	#ifndef WCONTINUED
1189	# define WCONTINUED 0	1268	# define WCONTINUED 0
1190	#endif	1269	#endif
1191		1270
		1271	/* called on sigchld etc., calls waitpid */
1192	static void	1272	static void
1193	childcb (EV_P_ ev_signal *sw, int revents)	1273	childcb (EV_P_ ev_signal *sw, int revents)
1194	{	1274	{
1195	int pid, status;	1275	int pid, status;
1196		1276
…		…
1303	ev_backend (EV_P)	1383	ev_backend (EV_P)
1304	{	1384	{
1305	return backend;	1385	return backend;
1306	}	1386	}
1307		1387
		1388	#if EV_MINIMAL < 2
1308	unsigned int	1389	unsigned int
1309	ev_loop_count (EV_P)	1390	ev_loop_count (EV_P)
1310	{	1391	{
1311	return loop_count;	1392	return loop_count;
1312	}	1393	}
1313		1394
		1395	unsigned int
		1396	ev_loop_depth (EV_P)
		1397	{
		1398	return loop_depth;
		1399	}
		1400
1314	void	1401	void
1315	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1402	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1316	{	1403	{
1317	io_blocktime = interval;	1404	io_blocktime = interval;
1318	}	1405	}
…		…
1321	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1408	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1322	{	1409	{
1323	timeout_blocktime = interval;	1410	timeout_blocktime = interval;
1324	}	1411	}
1325		1412
		1413	void
		1414	ev_set_userdata (EV_P_ void *data)
		1415	{
		1416	userdata = data;
		1417	}
		1418
		1419	void *
		1420	ev_userdata (EV_P)
		1421	{
		1422	return userdata;
		1423	}
		1424
		1425	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1426	{
		1427	invoke_cb = invoke_pending_cb;
		1428	}
		1429
		1430	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
		1431	{
		1432	release_cb = release;
		1433	acquire_cb = acquire;
		1434	}
		1435	#endif
		1436
		1437	/* initialise a loop structure, must be zero-initialised */
1326	static void noinline	1438	static void noinline
1327	loop_init (EV_P_ unsigned int flags)	1439	loop_init (EV_P_ unsigned int flags)
1328	{	1440	{
1329	if (!backend)	1441	if (!backend)
1330	{	1442	{
…		…
1350		1462
1351	ev_rt_now = ev_time ();	1463	ev_rt_now = ev_time ();
1352	mn_now = get_clock ();	1464	mn_now = get_clock ();
1353	now_floor = mn_now;	1465	now_floor = mn_now;
1354	rtmn_diff = ev_rt_now - mn_now;	1466	rtmn_diff = ev_rt_now - mn_now;
		1467	#if EV_MINIMAL < 2
		1468	invoke_cb = ev_invoke_pending;
		1469	#endif
1355		1470
1356	io_blocktime = 0.;	1471	io_blocktime = 0.;
1357	timeout_blocktime = 0.;	1472	timeout_blocktime = 0.;
1358	backend = 0;	1473	backend = 0;
1359	backend_fd = -1;	1474	backend_fd = -1;
…		…
1390	#endif	1505	#endif
1391	#if EV_USE_SELECT	1506	#if EV_USE_SELECT
1392	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1507	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1393	#endif	1508	#endif
1394		1509
		1510	ev_prepare_init (&pending_w, pendingcb);
		1511
1395	ev_init (&pipeev, pipecb);	1512	ev_init (&pipe_w, pipecb);
1396	ev_set_priority (&pipeev, EV_MAXPRI);	1513	ev_set_priority (&pipe_w, EV_MAXPRI);
1397	}	1514	}
1398	}	1515	}
1399		1516
		1517	/* free up a loop structure */
1400	static void noinline	1518	static void noinline
1401	loop_destroy (EV_P)	1519	loop_destroy (EV_P)
1402	{	1520	{
1403	int i;	1521	int i;
1404		1522
1405	if (ev_is_active (&pipeev))	1523	if (ev_is_active (&pipe_w))
1406	{	1524	{
1407	ev_ref (EV_A); /* signal watcher */	1525	ev_ref (EV_A); /* signal watcher */
1408	ev_io_stop (EV_A_ &pipeev);	1526	ev_io_stop (EV_A_ &pipe_w);
1409		1527
1410	#if EV_USE_EVENTFD	1528	#if EV_USE_EVENTFD
1411	if (evfd >= 0)	1529	if (evfd >= 0)
1412	close (evfd);	1530	close (evfd);
1413	#endif	1531	#endif
…		…
1452	}	1570	}
1453		1571
1454	ev_free (anfds); anfdmax = 0;	1572	ev_free (anfds); anfdmax = 0;
1455		1573
1456	/* have to use the microsoft-never-gets-it-right macro */	1574	/* have to use the microsoft-never-gets-it-right macro */
		1575	array_free (rfeed, EMPTY);
1457	array_free (fdchange, EMPTY);	1576	array_free (fdchange, EMPTY);
1458	array_free (timer, EMPTY);	1577	array_free (timer, EMPTY);
1459	#if EV_PERIODIC_ENABLE	1578	#if EV_PERIODIC_ENABLE
1460	array_free (periodic, EMPTY);	1579	array_free (periodic, EMPTY);
1461	#endif	1580	#endif
…		…
1470		1589
1471	backend = 0;	1590	backend = 0;
1472	}	1591	}
1473		1592
1474	#if EV_USE_INOTIFY	1593	#if EV_USE_INOTIFY
1475	void inline_size infy_fork (EV_P);	1594	inline_size void infy_fork (EV_P);
1476	#endif	1595	#endif
1477		1596
1478	void inline_size	1597	inline_size void
1479	loop_fork (EV_P)	1598	loop_fork (EV_P)
1480	{	1599	{
1481	#if EV_USE_PORT	1600	#if EV_USE_PORT
1482	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1601	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1483	#endif	1602	#endif
…		…
1489	#endif	1608	#endif
1490	#if EV_USE_INOTIFY	1609	#if EV_USE_INOTIFY
1491	infy_fork (EV_A);	1610	infy_fork (EV_A);
1492	#endif	1611	#endif
1493		1612
1494	if (ev_is_active (&pipeev))	1613	if (ev_is_active (&pipe_w))
1495	{	1614	{
1496	/* this "locks" the handlers against writing to the pipe */	1615	/* this "locks" the handlers against writing to the pipe */
1497	/* while we modify the fd vars */	1616	/* while we modify the fd vars */
1498	gotsig = 1;	1617	gotsig = 1;
1499	#if EV_ASYNC_ENABLE	1618	#if EV_ASYNC_ENABLE
1500	gotasync = 1;	1619	gotasync = 1;
1501	#endif	1620	#endif
1502		1621
1503	ev_ref (EV_A);	1622	ev_ref (EV_A);
1504	ev_io_stop (EV_A_ &pipeev);	1623	ev_io_stop (EV_A_ &pipe_w);
1505		1624
1506	#if EV_USE_EVENTFD	1625	#if EV_USE_EVENTFD
1507	if (evfd >= 0)	1626	if (evfd >= 0)
1508	close (evfd);	1627	close (evfd);
1509	#endif	1628	#endif
…		…
1514	close (evpipe [1]);	1633	close (evpipe [1]);
1515	}	1634	}
1516		1635
1517	evpipe_init (EV_A);	1636	evpipe_init (EV_A);
1518	/* now iterate over everything, in case we missed something */	1637	/* now iterate over everything, in case we missed something */
1519	pipecb (EV_A_ &pipeev, EV_READ);	1638	pipecb (EV_A_ &pipe_w, EV_READ);
1520	}	1639	}
1521		1640
1522	postfork = 0;	1641	postfork = 0;
1523	}	1642	}
1524		1643
…		…
1549	void	1668	void
1550	ev_loop_fork (EV_P)	1669	ev_loop_fork (EV_P)
1551	{	1670	{
1552	postfork = 1; /* must be in line with ev_default_fork */	1671	postfork = 1; /* must be in line with ev_default_fork */
1553	}	1672	}
		1673	#endif /* multiplicity */
1554		1674
1555	#if EV_VERIFY	1675	#if EV_VERIFY
1556	static void noinline	1676	static void noinline
1557	verify_watcher (EV_P_ W w)	1677	verify_watcher (EV_P_ W w)
1558	{	1678	{
…		…
1586	verify_watcher (EV_A_ ws [cnt]);	1706	verify_watcher (EV_A_ ws [cnt]);
1587	}	1707	}
1588	}	1708	}
1589	#endif	1709	#endif
1590		1710
		1711	#if EV_MINIMAL < 2
1591	void	1712	void
1592	ev_loop_verify (EV_P)	1713	ev_loop_verify (EV_P)
1593	{	1714	{
1594	#if EV_VERIFY	1715	#if EV_VERIFY
1595	int i;	1716	int i;
…		…
1648	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1769	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
1649	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)	1770	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1650	# endif	1771	# endif
1651	#endif	1772	#endif
1652	}	1773	}
1653		1774	#endif
1654	#endif /* multiplicity */
1655		1775
1656	#if EV_MULTIPLICITY	1776	#if EV_MULTIPLICITY
1657	struct ev_loop *	1777	struct ev_loop *
1658	ev_default_loop_init (unsigned int flags)	1778	ev_default_loop_init (unsigned int flags)
1659	#else	1779	#else
…		…
1720	ev_invoke (EV_P_ void *w, int revents)	1840	ev_invoke (EV_P_ void *w, int revents)
1721	{	1841	{
1722	EV_CB_INVOKE ((W)w, revents);	1842	EV_CB_INVOKE ((W)w, revents);
1723	}	1843	}
1724		1844
1725	void inline_speed	1845	unsigned int
1726	call_pending (EV_P)	1846	ev_pending_count (EV_P)
		1847	{
		1848	int pri;
		1849	unsigned int count = 0;
		1850
		1851	for (pri = NUMPRI; pri--; )
		1852	count += pendingcnt [pri];
		1853
		1854	return count;
		1855	}
		1856
		1857	void noinline
		1858	ev_invoke_pending (EV_P)
1727	{	1859	{
1728	int pri;	1860	int pri;
1729		1861
1730	for (pri = NUMPRI; pri--; )	1862	for (pri = NUMPRI; pri--; )
1731	while (pendingcnt [pri])	1863	while (pendingcnt [pri])
1732	{	1864	{
1733	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1865	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1734		1866
1735	if (expect_true (p->w))
1736	{
1737	/assert (("libev: non-pending watcher on pending list", p->w->pending));/	1867	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
		1868	/* ^ this is no longer true, as pending_w could be here */
1738		1869
1739	p->w->pending = 0;	1870	p->w->pending = 0;
1740	EV_CB_INVOKE (p->w, p->events);	1871	EV_CB_INVOKE (p->w, p->events);
1741	EV_FREQUENT_CHECK;	1872	EV_FREQUENT_CHECK;
1742	}
1743	}	1873	}
1744	}	1874	}
1745		1875
1746	#if EV_IDLE_ENABLE	1876	#if EV_IDLE_ENABLE
1747	void inline_size	1877	/* make idle watchers pending. this handles the "call-idle */
		1878	/* only when higher priorities are idle" logic */
		1879	inline_size void
1748	idle_reify (EV_P)	1880	idle_reify (EV_P)
1749	{	1881	{
1750	if (expect_false (idleall))	1882	if (expect_false (idleall))
1751	{	1883	{
1752	int pri;	1884	int pri;
…		…
1764	}	1896	}
1765	}	1897	}
1766	}	1898	}
1767	#endif	1899	#endif
1768		1900
1769	void inline_size	1901	/* make timers pending */
		1902	inline_size void
1770	timers_reify (EV_P)	1903	timers_reify (EV_P)
1771	{	1904	{
1772	EV_FREQUENT_CHECK;	1905	EV_FREQUENT_CHECK;
1773		1906
1774	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1907	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1775	{	1908	{
1776	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);	1909	do
1777
1778	/assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));/
1779
1780	/* first reschedule or stop timer */
1781	if (w->repeat)
1782	{	1910	{
		1911	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);
		1912
		1913	/assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));/
		1914
		1915	/* first reschedule or stop timer */
		1916	if (w->repeat)
		1917	{
1783	ev_at (w) += w->repeat;	1918	ev_at (w) += w->repeat;
1784	if (ev_at (w) < mn_now)	1919	if (ev_at (w) < mn_now)
1785	ev_at (w) = mn_now;	1920	ev_at (w) = mn_now;
1786		1921
1787	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1922	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1788		1923
1789	ANHE_at_cache (timers [HEAP0]);	1924	ANHE_at_cache (timers [HEAP0]);
1790	downheap (timers, timercnt, HEAP0);	1925	downheap (timers, timercnt, HEAP0);
		1926	}
		1927	else
		1928	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1929
		1930	EV_FREQUENT_CHECK;
		1931	feed_reverse (EV_A_ (W)w);
1791	}	1932	}
1792	else	1933	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1793	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1794		1934
1795	EV_FREQUENT_CHECK;
1796	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1935	feed_reverse_done (EV_A_ EV_TIMEOUT);
1797	}	1936	}
1798	}	1937	}
1799		1938
1800	#if EV_PERIODIC_ENABLE	1939	#if EV_PERIODIC_ENABLE
1801	void inline_size	1940	/* make periodics pending */
		1941	inline_size void
1802	periodics_reify (EV_P)	1942	periodics_reify (EV_P)
1803	{	1943	{
1804	EV_FREQUENT_CHECK;	1944	EV_FREQUENT_CHECK;
1805		1945
1806	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1946	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1807	{	1947	{
1808	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);	1948	int feed_count = 0;
1809		1949
1810	/assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));/	1950	do
1811
1812	/* first reschedule or stop timer */
1813	if (w->reschedule_cb)
1814	{	1951	{
		1952	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);
		1953
		1954	/assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));/
		1955
		1956	/* first reschedule or stop timer */
		1957	if (w->reschedule_cb)
		1958	{
1815	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1959	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1816		1960
1817	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1961	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1818		1962
1819	ANHE_at_cache (periodics [HEAP0]);	1963	ANHE_at_cache (periodics [HEAP0]);
1820	downheap (periodics, periodiccnt, HEAP0);	1964	downheap (periodics, periodiccnt, HEAP0);
		1965	}
		1966	else if (w->interval)
		1967	{
		1968	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1969	/* if next trigger time is not sufficiently in the future, put it there */
		1970	/* this might happen because of floating point inexactness */
		1971	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1972	{
		1973	ev_at (w) += w->interval;
		1974
		1975	/* if interval is unreasonably low we might still have a time in the past */
		1976	/* so correct this. this will make the periodic very inexact, but the user */
		1977	/* has effectively asked to get triggered more often than possible */
		1978	if (ev_at (w) < ev_rt_now)
		1979	ev_at (w) = ev_rt_now;
		1980	}
		1981
		1982	ANHE_at_cache (periodics [HEAP0]);
		1983	downheap (periodics, periodiccnt, HEAP0);
		1984	}
		1985	else
		1986	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1987
		1988	EV_FREQUENT_CHECK;
		1989	feed_reverse (EV_A_ (W)w);
1821	}	1990	}
1822	else if (w->interval)	1991	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1823	{
1824	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1825	/* if next trigger time is not sufficiently in the future, put it there */
1826	/* this might happen because of floating point inexactness */
1827	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1828	{
1829	ev_at (w) += w->interval;
1830		1992
1831	/* if interval is unreasonably low we might still have a time in the past */
1832	/* so correct this. this will make the periodic very inexact, but the user */
1833	/* has effectively asked to get triggered more often than possible */
1834	if (ev_at (w) < ev_rt_now)
1835	ev_at (w) = ev_rt_now;
1836	}
1837
1838	ANHE_at_cache (periodics [HEAP0]);
1839	downheap (periodics, periodiccnt, HEAP0);
1840	}
1841	else
1842	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1843
1844	EV_FREQUENT_CHECK;
1845	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1993	feed_reverse_done (EV_A_ EV_PERIODIC);
1846	}	1994	}
1847	}	1995	}
1848		1996
		1997	/* simply recalculate all periodics */
		1998	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1849	static void noinline	1999	static void noinline
1850	periodics_reschedule (EV_P)	2000	periodics_reschedule (EV_P)
1851	{	2001	{
1852	int i;	2002	int i;
1853		2003
…		…
1866		2016
1867	reheap (periodics, periodiccnt);	2017	reheap (periodics, periodiccnt);
1868	}	2018	}
1869	#endif	2019	#endif
1870		2020
1871	void inline_speed	2021	/* adjust all timers by a given offset */
		2022	static void noinline
		2023	timers_reschedule (EV_P_ ev_tstamp adjust)
		2024	{
		2025	int i;
		2026
		2027	for (i = 0; i < timercnt; ++i)
		2028	{
		2029	ANHE *he = timers + i + HEAP0;
		2030	ANHE_w (*he)->at += adjust;
		2031	ANHE_at_cache (*he);
		2032	}
		2033	}
		2034
		2035	/* fetch new monotonic and realtime times from the kernel */
		2036	/* also detetc if there was a timejump, and act accordingly */
		2037	inline_speed void
1872	time_update (EV_P_ ev_tstamp max_block)	2038	time_update (EV_P_ ev_tstamp max_block)
1873	{	2039	{
1874	int i;
1875
1876	#if EV_USE_MONOTONIC	2040	#if EV_USE_MONOTONIC
1877	if (expect_true (have_monotonic))	2041	if (expect_true (have_monotonic))
1878	{	2042	{
		2043	int i;
1879	ev_tstamp odiff = rtmn_diff;	2044	ev_tstamp odiff = rtmn_diff;
1880		2045
1881	mn_now = get_clock ();	2046	mn_now = get_clock ();
1882		2047
1883	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /	2048	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
…		…
1909	ev_rt_now = ev_time ();	2074	ev_rt_now = ev_time ();
1910	mn_now = get_clock ();	2075	mn_now = get_clock ();
1911	now_floor = mn_now;	2076	now_floor = mn_now;
1912	}	2077	}
1913		2078
		2079	/* no timer adjustment, as the monotonic clock doesn't jump */
		2080	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1914	# if EV_PERIODIC_ENABLE	2081	# if EV_PERIODIC_ENABLE
1915	periodics_reschedule (EV_A);	2082	periodics_reschedule (EV_A);
1916	# endif	2083	# endif
1917	/* no timer adjustment, as the monotonic clock doesn't jump */
1918	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1919	}	2084	}
1920	else	2085	else
1921	#endif	2086	#endif
1922	{	2087	{
1923	ev_rt_now = ev_time ();	2088	ev_rt_now = ev_time ();
1924		2089
1925	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2090	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1926	{	2091	{
		2092	/* adjust timers. this is easy, as the offset is the same for all of them */
		2093	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1927	#if EV_PERIODIC_ENABLE	2094	#if EV_PERIODIC_ENABLE
1928	periodics_reschedule (EV_A);	2095	periodics_reschedule (EV_A);
1929	#endif	2096	#endif
1930	/* adjust timers. this is easy, as the offset is the same for all of them */
1931	for (i = 0; i < timercnt; ++i)
1932	{
1933	ANHE *he = timers + i + HEAP0;
1934	ANHE_w (*he)->at += ev_rt_now - mn_now;
1935	ANHE_at_cache (*he);
1936	}
1937	}	2097	}
1938		2098
1939	mn_now = ev_rt_now;	2099	mn_now = ev_rt_now;
1940	}	2100	}
1941	}	2101	}
1942		2102
1943	void	2103	void
1944	ev_ref (EV_P)
1945	{
1946	++activecnt;
1947	}
1948
1949	void
1950	ev_unref (EV_P)
1951	{
1952	--activecnt;
1953	}
1954
1955	void
1956	ev_now_update (EV_P)
1957	{
1958	time_update (EV_A_ 1e100);
1959	}
1960
1961	static int loop_done;
1962
1963	void
1964	ev_loop (EV_P_ int flags)	2104	ev_loop (EV_P_ int flags)
1965	{	2105	{
		2106	#if EV_MINIMAL < 2
		2107	++loop_depth;
		2108	#endif
		2109
		2110	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
		2111
1966	loop_done = EVUNLOOP_CANCEL;	2112	loop_done = EVUNLOOP_CANCEL;
1967		2113
1968	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2114	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1969		2115
1970	do	2116	do
1971	{	2117	{
1972	#if EV_VERIFY >= 2	2118	#if EV_VERIFY >= 2
1973	ev_loop_verify (EV_A);	2119	ev_loop_verify (EV_A);
…		…
1986	/* we might have forked, so queue fork handlers */	2132	/* we might have forked, so queue fork handlers */
1987	if (expect_false (postfork))	2133	if (expect_false (postfork))
1988	if (forkcnt)	2134	if (forkcnt)
1989	{	2135	{
1990	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2136	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1991	call_pending (EV_A);	2137	EV_INVOKE_PENDING;
1992	}	2138	}
1993	#endif	2139	#endif
1994		2140
1995	/* queue prepare watchers (and execute them) */	2141	/* queue prepare watchers (and execute them) */
1996	if (expect_false (preparecnt))	2142	if (expect_false (preparecnt))
1997	{	2143	{
1998	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2144	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1999	call_pending (EV_A);	2145	EV_INVOKE_PENDING;
2000	}	2146	}
2001		2147
2002	if (expect_false (!activecnt))	2148	if (expect_false (loop_done))
2003	break;	2149	break;
2004		2150
2005	/* we might have forked, so reify kernel state if necessary */	2151	/* we might have forked, so reify kernel state if necessary */
2006	if (expect_false (postfork))	2152	if (expect_false (postfork))
2007	loop_fork (EV_A);	2153	loop_fork (EV_A);
…		…
2014	ev_tstamp waittime = 0.;	2160	ev_tstamp waittime = 0.;
2015	ev_tstamp sleeptime = 0.;	2161	ev_tstamp sleeptime = 0.;
2016		2162
2017	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))	2163	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
2018	{	2164	{
		2165	/* remember old timestamp for io_blocktime calculation */
		2166	ev_tstamp prev_mn_now = mn_now;
		2167
2019	/* update time to cancel out callback processing overhead */	2168	/* update time to cancel out callback processing overhead */
2020	time_update (EV_A_ 1e100);	2169	time_update (EV_A_ 1e100);
2021		2170
2022	waittime = MAX_BLOCKTIME;	2171	waittime = MAX_BLOCKTIME;
2023		2172
…		…
2033	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2182	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2034	if (waittime > to) waittime = to;	2183	if (waittime > to) waittime = to;
2035	}	2184	}
2036	#endif	2185	#endif
2037		2186
		2187	/* don't let timeouts decrease the waittime below timeout_blocktime */
2038	if (expect_false (waittime < timeout_blocktime))	2188	if (expect_false (waittime < timeout_blocktime))
2039	waittime = timeout_blocktime;	2189	waittime = timeout_blocktime;
2040		2190
2041	sleeptime = waittime - backend_fudge;	2191	/* extra check because io_blocktime is commonly 0 */
2042
2043	if (expect_true (sleeptime > io_blocktime))	2192	if (expect_false (io_blocktime))
2044	sleeptime = io_blocktime;
2045
2046	if (sleeptime)
2047	{	2193	{
		2194	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2195
		2196	if (sleeptime > waittime - backend_fudge)
		2197	sleeptime = waittime - backend_fudge;
		2198
		2199	if (expect_true (sleeptime > 0.))
		2200	{
2048	ev_sleep (sleeptime);	2201	ev_sleep (sleeptime);
2049	waittime -= sleeptime;	2202	waittime -= sleeptime;
		2203	}
2050	}	2204	}
2051	}	2205	}
2052		2206
		2207	#if EV_MINIMAL < 2
2053	++loop_count;	2208	++loop_count;
		2209	#endif
		2210	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2054	backend_poll (EV_A_ waittime);	2211	backend_poll (EV_A_ waittime);
		2212	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2055		2213
2056	/* update ev_rt_now, do magic */	2214	/* update ev_rt_now, do magic */
2057	time_update (EV_A_ waittime + sleeptime);	2215	time_update (EV_A_ waittime + sleeptime);
2058	}	2216	}
2059		2217
…		…
2070		2228
2071	/* queue check watchers, to be executed first */	2229	/* queue check watchers, to be executed first */
2072	if (expect_false (checkcnt))	2230	if (expect_false (checkcnt))
2073	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2231	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2074		2232
2075	call_pending (EV_A);	2233	EV_INVOKE_PENDING;
2076	}	2234	}
2077	while (expect_true (	2235	while (expect_true (
2078	activecnt	2236	activecnt
2079	&& !loop_done	2237	&& !loop_done
2080	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))	2238	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
2081	));	2239	));
2082		2240
2083	if (loop_done == EVUNLOOP_ONE)	2241	if (loop_done == EVUNLOOP_ONE)
2084	loop_done = EVUNLOOP_CANCEL;	2242	loop_done = EVUNLOOP_CANCEL;
		2243
		2244	#if EV_MINIMAL < 2
		2245	--loop_depth;
		2246	#endif
2085	}	2247	}
2086		2248
2087	void	2249	void
2088	ev_unloop (EV_P_ int how)	2250	ev_unloop (EV_P_ int how)
2089	{	2251	{
2090	loop_done = how;	2252	loop_done = how;
2091	}	2253	}
2092		2254
		2255	void
		2256	ev_ref (EV_P)
		2257	{
		2258	++activecnt;
		2259	}
		2260
		2261	void
		2262	ev_unref (EV_P)
		2263	{
		2264	--activecnt;
		2265	}
		2266
		2267	void
		2268	ev_now_update (EV_P)
		2269	{
		2270	time_update (EV_A_ 1e100);
		2271	}
		2272
		2273	void
		2274	ev_suspend (EV_P)
		2275	{
		2276	ev_now_update (EV_A);
		2277	}
		2278
		2279	void
		2280	ev_resume (EV_P)
		2281	{
		2282	ev_tstamp mn_prev = mn_now;
		2283
		2284	ev_now_update (EV_A);
		2285	timers_reschedule (EV_A_ mn_now - mn_prev);
		2286	#if EV_PERIODIC_ENABLE
		2287	/* TODO: really do this? */
		2288	periodics_reschedule (EV_A);
		2289	#endif
		2290	}
		2291
2093	/*****************************************************************************/	2292	/*****************************************************************************/
		2293	/* singly-linked list management, used when the expected list length is short */
2094		2294
2095	void inline_size	2295	inline_size void
2096	wlist_add (WL *head, WL elem)	2296	wlist_add (WL *head, WL elem)
2097	{	2297	{
2098	elem->next = *head;	2298	elem->next = *head;
2099	*head = elem;	2299	*head = elem;
2100	}	2300	}
2101		2301
2102	void inline_size	2302	inline_size void
2103	wlist_del (WL *head, WL elem)	2303	wlist_del (WL *head, WL elem)
2104	{	2304	{
2105	while (*head)	2305	while (*head)
2106	{	2306	{
2107	if (*head == elem)	2307	if (*head == elem)
…		…
2112		2312
2113	head = &(*head)->next;	2313	head = &(*head)->next;
2114	}	2314	}
2115	}	2315	}
2116		2316
2117	void inline_speed	2317	/* internal, faster, version of ev_clear_pending */
		2318	inline_speed void
2118	clear_pending (EV_P_ W w)	2319	clear_pending (EV_P_ W w)
2119	{	2320	{
2120	if (w->pending)	2321	if (w->pending)
2121	{	2322	{
2122	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2323	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2123	w->pending = 0;	2324	w->pending = 0;
2124	}	2325	}
2125	}	2326	}
2126		2327
2127	int	2328	int
…		…
2131	int pending = w_->pending;	2332	int pending = w_->pending;
2132		2333
2133	if (expect_true (pending))	2334	if (expect_true (pending))
2134	{	2335	{
2135	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2336	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2337	p->w = (W)&pending_w;
2136	w_->pending = 0;	2338	w_->pending = 0;
2137	p->w = 0;
2138	return p->events;	2339	return p->events;
2139	}	2340	}
2140	else	2341	else
2141	return 0;	2342	return 0;
2142	}	2343	}
2143		2344
2144	void inline_size	2345	inline_size void
2145	pri_adjust (EV_P_ W w)	2346	pri_adjust (EV_P_ W w)
2146	{	2347	{
2147	int pri = w->priority;	2348	int pri = ev_priority (w);
2148	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2349	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2149	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2350	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2150	w->priority = pri;	2351	ev_set_priority (w, pri);
2151	}	2352	}
2152		2353
2153	void inline_speed	2354	inline_speed void
2154	ev_start (EV_P_ W w, int active)	2355	ev_start (EV_P_ W w, int active)
2155	{	2356	{
2156	pri_adjust (EV_A_ w);	2357	pri_adjust (EV_A_ w);
2157	w->active = active;	2358	w->active = active;
2158	ev_ref (EV_A);	2359	ev_ref (EV_A);
2159	}	2360	}
2160		2361
2161	void inline_size	2362	inline_size void
2162	ev_stop (EV_P_ W w)	2363	ev_stop (EV_P_ W w)
2163	{	2364	{
2164	ev_unref (EV_A);	2365	ev_unref (EV_A);
2165	w->active = 0;	2366	w->active = 0;
2166	}	2367	}
…		…
2182		2383
2183	ev_start (EV_A_ (W)w, 1);	2384	ev_start (EV_A_ (W)w, 1);
2184	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2385	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2185	wlist_add (&anfds[fd].head, (WL)w);	2386	wlist_add (&anfds[fd].head, (WL)w);
2186		2387
2187	fd_change (EV_A_ fd, w->events & EV__IOFDSET \| 1);	2388	fd_change (EV_A_ fd, w->events & EV__IOFDSET \| EV_ANFD_REIFY);
2188	w->events &= ~EV__IOFDSET;	2389	w->events &= ~EV__IOFDSET;
2189		2390
2190	EV_FREQUENT_CHECK;	2391	EV_FREQUENT_CHECK;
2191	}	2392	}
2192		2393
…		…
2286	}	2487	}
2287		2488
2288	EV_FREQUENT_CHECK;	2489	EV_FREQUENT_CHECK;
2289	}	2490	}
2290		2491
		2492	ev_tstamp
		2493	ev_timer_remaining (EV_P_ ev_timer *w)
		2494	{
		2495	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2496	}
		2497
2291	#if EV_PERIODIC_ENABLE	2498	#if EV_PERIODIC_ENABLE
2292	void noinline	2499	void noinline
2293	ev_periodic_start (EV_P_ ev_periodic *w)	2500	ev_periodic_start (EV_P_ ev_periodic *w)
2294	{	2501	{
2295	if (expect_false (ev_is_active (w)))	2502	if (expect_false (ev_is_active (w)))
…		…
2396	if (!((WL)w)->next)	2603	if (!((WL)w)->next)
2397	{	2604	{
2398	#if _WIN32	2605	#if _WIN32
2399	signal (w->signum, ev_sighandler);	2606	signal (w->signum, ev_sighandler);
2400	#else	2607	#else
2401	struct sigaction sa;	2608	struct sigaction sa = { };
2402	sa.sa_handler = ev_sighandler;	2609	sa.sa_handler = ev_sighandler;
2403	sigfillset (&sa.sa_mask);	2610	sigfillset (&sa.sa_mask);
2404	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2611	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2405	sigaction (w->signum, &sa, 0);	2612	sigaction (w->signum, &sa, 0);
2406	#endif	2613	#endif
…		…
2591		2798
2592	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2799	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2593	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2800	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2594	}	2801	}
2595		2802
2596	void inline_size	2803	inline_size void
2597	check_2625 (EV_P)	2804	check_2625 (EV_P)
2598	{	2805	{
2599	/* kernels < 2.6.25 are borked	2806	/* kernels < 2.6.25 are borked
2600	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2807	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2601	*/	2808	*/
…		…
2614	return;	2821	return;
2615		2822
2616	fs_2625 = 1;	2823	fs_2625 = 1;
2617	}	2824	}
2618		2825
2619	void inline_size	2826	inline_size void
2620	infy_init (EV_P)	2827	infy_init (EV_P)
2621	{	2828	{
2622	if (fs_fd != -2)	2829	if (fs_fd != -2)
2623	return;	2830	return;
2624		2831
…		…
2634	ev_set_priority (&fs_w, EV_MAXPRI);	2841	ev_set_priority (&fs_w, EV_MAXPRI);
2635	ev_io_start (EV_A_ &fs_w);	2842	ev_io_start (EV_A_ &fs_w);
2636	}	2843	}
2637	}	2844	}
2638		2845
2639	void inline_size	2846	inline_size void
2640	infy_fork (EV_P)	2847	infy_fork (EV_P)
2641	{	2848	{
2642	int slot;	2849	int slot;
2643		2850
2644	if (fs_fd < 0)	2851	if (fs_fd < 0)
…		…
3148	}	3355	}
3149	}	3356	}
3150		3357
3151	/*****************************************************************************/	3358	/*****************************************************************************/
3152		3359
3153	#if 0	3360	#if EV_WALK_ENABLE
3154	void	3361	void
3155	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3362	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3156	{	3363	{
3157	int i, j;	3364	int i, j;
3158	ev_watcher_list wl, wn;	3365	ev_watcher_list wl, wn;
…		…
3174	#if EV_USE_INOTIFY	3381	#if EV_USE_INOTIFY
3175	if (ev_cb ((ev_io *)wl) == infy_cb)	3382	if (ev_cb ((ev_io *)wl) == infy_cb)
3176	;	3383	;
3177	else	3384	else
3178	#endif	3385	#endif
3179	if ((ev_io *)wl != &pipeev)	3386	if ((ev_io *)wl != &pipe_w)
3180	if (types & EV_IO)	3387	if (types & EV_IO)
3181	cb (EV_A_ EV_IO, wl);	3388	cb (EV_A_ EV_IO, wl);
3182		3389
3183	wl = wn;	3390	wl = wn;
3184	}	3391	}

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Comparing libev/ev.c (file contents): Revision 1.282 by root, Sat Mar 28 22:17:17 2009 UTC vs. Revision 1.301 by root, Wed Jul 15 16:58:53 2009 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.282 by root, Sat Mar 28 22:17:17 2009 UTC vs.
Revision 1.301 by root, Wed Jul 15 16:58:53 2009 UTC