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

Comparing libev/ev.c (file contents):
Revision 1.283 by root, Wed Apr 15 09:51:19 2009 UTC vs.
Revision 1.297 by root, Fri Jul 10 00:36:21 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	/* file descriptor info structure */
483	typedef struct	496	typedef struct
484	{	497	{
485	WL head;	498	WL head;
486	unsigned char events;	499	unsigned char events; /* the events watched for */
487	unsigned char reify;	500	unsigned char reify; /* flag set when this ANFD needs reification */
488	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	501	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489	unsigned char unused;	502	unsigned char unused;
490	#if EV_USE_EPOLL	503	#if EV_USE_EPOLL
491	unsigned int egen; /* generation counter to counter epoll bugs */	504	unsigned int egen; /* generation counter to counter epoll bugs */
492	#endif	505	#endif
493	#if EV_SELECT_IS_WINSOCKET	506	#if EV_SELECT_IS_WINSOCKET
494	SOCKET handle;	507	SOCKET handle;
495	#endif	508	#endif
496	} ANFD;	509	} ANFD;
497		510
		511	/* stores the pending event set for a given watcher */
498	typedef struct	512	typedef struct
499	{	513	{
500	W w;	514	W w;
501	int events;	515	int events; /* the pending event set for the given watcher */
502	} ANPENDING;	516	} ANPENDING;
503		517
504	#if EV_USE_INOTIFY	518	#if EV_USE_INOTIFY
505	/* hash table entry per inotify-id */	519	/* hash table entry per inotify-id */
506	typedef struct	520	typedef struct
…		…
509	} ANFS;	523	} ANFS;
510	#endif	524	#endif
511		525
512	/* Heap Entry */	526	/* Heap Entry */
513	#if EV_HEAP_CACHE_AT	527	#if EV_HEAP_CACHE_AT
		528	/* a heap element */
514	typedef struct {	529	typedef struct {
515	ev_tstamp at;	530	ev_tstamp at;
516	WT w;	531	WT w;
517	} ANHE;	532	} ANHE;
518		533
519	#define ANHE_w(he) (he).w /* access watcher, read-write */	534	#define ANHE_w(he) (he).w /* access watcher, read-write */
520	#define ANHE_at(he) (he).at /* access cached at, read-only */	535	#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 */	536	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522	#else	537	#else
		538	/* a heap element */
523	typedef WT ANHE;	539	typedef WT ANHE;
524		540
525	#define ANHE_w(he) (he)	541	#define ANHE_w(he) (he)
526	#define ANHE_at(he) (he)->at	542	#define ANHE_at(he) (he)->at
527	#define ANHE_at_cache(he)	543	#define ANHE_at_cache(he)
…		…
551		567
552	static int ev_default_loop_ptr;	568	static int ev_default_loop_ptr;
553		569
554	#endif	570	#endif
555		571
		572	#if EV_MINIMAL < 2
		573	# define EV_SUSPEND_CB if (expect_false (suspend_cb)) suspend_cb (EV_A)
		574	# define EV_RESUME_CB if (expect_false (resume_cb )) resume_cb (EV_A)
		575	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		576	#else
		577	# define EV_SUSPEND_CB (void)0
		578	# define EV_RESUME_CB (void)0
		579	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		580	#endif
		581
556	/*****************************************************************************/	582	/*****************************************************************************/
557		583
		584	#ifndef EV_HAVE_EV_TIME
558	ev_tstamp	585	ev_tstamp
559	ev_time (void)	586	ev_time (void)
560	{	587	{
561	#if EV_USE_REALTIME	588	#if EV_USE_REALTIME
562	if (expect_true (have_realtime))	589	if (expect_true (have_realtime))
…		…
569		596
570	struct timeval tv;	597	struct timeval tv;
571	gettimeofday (&tv, 0);	598	gettimeofday (&tv, 0);
572	return tv.tv_sec + tv.tv_usec * 1e-6;	599	return tv.tv_sec + tv.tv_usec * 1e-6;
573	}	600	}
		601	#endif
574		602
575	ev_tstamp inline_size	603	inline_size ev_tstamp
576	get_clock (void)	604	get_clock (void)
577	{	605	{
578	#if EV_USE_MONOTONIC	606	#if EV_USE_MONOTONIC
579	if (expect_true (have_monotonic))	607	if (expect_true (have_monotonic))
580	{	608	{
…		…
614		642
615	tv.tv_sec = (time_t)delay;	643	tv.tv_sec = (time_t)delay;
616	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	644	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617		645
618	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	646	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619	/* somehting nto guaranteed by newer posix versions, but guaranteed */	647	/* somehting not guaranteed by newer posix versions, but guaranteed */
620	/* by older ones */	648	/* by older ones */
621	select (0, 0, 0, 0, &tv);	649	select (0, 0, 0, 0, &tv);
622	#endif	650	#endif
623	}	651	}
624	}	652	}
625		653
626	/*****************************************************************************/	654	/*****************************************************************************/
627		655
628	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	656	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
629		657
630	int inline_size	658	/* find a suitable new size for the given array, */
		659	/* hopefully by rounding to a ncie-to-malloc size */
		660	inline_size int
631	array_nextsize (int elem, int cur, int cnt)	661	array_nextsize (int elem, int cur, int cnt)
632	{	662	{
633	int ncur = cur + 1;	663	int ncur = cur + 1;
634		664
635	do	665	do
…		…
680	#define array_free(stem, idx) \	710	#define array_free(stem, idx) \
681	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0	711	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
682		712
683	/*****************************************************************************/	713	/*****************************************************************************/
684		714
		715	/* dummy callback for pending events */
		716	static void noinline
		717	pendingcb (EV_P_ ev_prepare *w, int revents)
		718	{
		719	}
		720
685	void noinline	721	void noinline
686	ev_feed_event (EV_P_ void *w, int revents)	722	ev_feed_event (EV_P_ void *w, int revents)
687	{	723	{
688	W w_ = (W)w;	724	W w_ = (W)w;
689	int pri = ABSPRI (w_);	725	int pri = ABSPRI (w_);
…		…
697	pendings [pri][w_->pending - 1].w = w_;	733	pendings [pri][w_->pending - 1].w = w_;
698	pendings [pri][w_->pending - 1].events = revents;	734	pendings [pri][w_->pending - 1].events = revents;
699	}	735	}
700	}	736	}
701		737
702	void inline_speed	738	inline_speed void
		739	feed_reverse (EV_P_ W w)
		740	{
		741	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		742	rfeeds [rfeedcnt++] = w;
		743	}
		744
		745	inline_size void
		746	feed_reverse_done (EV_P_ int revents)
		747	{
		748	do
		749	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		750	while (rfeedcnt);
		751	}
		752
		753	inline_speed void
703	queue_events (EV_P_ W *events, int eventcnt, int type)	754	queue_events (EV_P_ W *events, int eventcnt, int type)
704	{	755	{
705	int i;	756	int i;
706		757
707	for (i = 0; i < eventcnt; ++i)	758	for (i = 0; i < eventcnt; ++i)
708	ev_feed_event (EV_A_ events [i], type);	759	ev_feed_event (EV_A_ events [i], type);
709	}	760	}
710		761
711	/*****************************************************************************/	762	/*****************************************************************************/
712		763
713	void inline_speed	764	inline_speed void
714	fd_event (EV_P_ int fd, int revents)	765	fd_event (EV_P_ int fd, int revents)
715	{	766	{
716	ANFD *anfd = anfds + fd;	767	ANFD *anfd = anfds + fd;
717	ev_io *w;	768	ev_io *w;
718		769
…		…
730	{	781	{
731	if (fd >= 0 && fd < anfdmax)	782	if (fd >= 0 && fd < anfdmax)
732	fd_event (EV_A_ fd, revents);	783	fd_event (EV_A_ fd, revents);
733	}	784	}
734		785
735	void inline_size	786	/* make sure the external fd watch events are in-sync */
		787	/* with the kernel/libev internal state */
		788	inline_size void
736	fd_reify (EV_P)	789	fd_reify (EV_P)
737	{	790	{
738	int i;	791	int i;
739		792
740	for (i = 0; i < fdchangecnt; ++i)	793	for (i = 0; i < fdchangecnt; ++i)
…		…
774	}	827	}
775		828
776	fdchangecnt = 0;	829	fdchangecnt = 0;
777	}	830	}
778		831
779	void inline_size	832	/* something about the given fd changed */
		833	inline_size void
780	fd_change (EV_P_ int fd, int flags)	834	fd_change (EV_P_ int fd, int flags)
781	{	835	{
782	unsigned char reify = anfds [fd].reify;	836	unsigned char reify = anfds [fd].reify;
783	anfds [fd].reify \|= flags;	837	anfds [fd].reify \|= flags;
784		838
…		…
788	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	842	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
789	fdchanges [fdchangecnt - 1] = fd;	843	fdchanges [fdchangecnt - 1] = fd;
790	}	844	}
791	}	845	}
792		846
793	void inline_speed	847	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		848	inline_speed void
794	fd_kill (EV_P_ int fd)	849	fd_kill (EV_P_ int fd)
795	{	850	{
796	ev_io *w;	851	ev_io *w;
797		852
798	while ((w = (ev_io *)anfds [fd].head))	853	while ((w = (ev_io *)anfds [fd].head))
…		…
800	ev_io_stop (EV_A_ w);	855	ev_io_stop (EV_A_ w);
801	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	856	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
802	}	857	}
803	}	858	}
804		859
805	int inline_size	860	/* check whether the given fd is atcually valid, for error recovery */
		861	inline_size int
806	fd_valid (int fd)	862	fd_valid (int fd)
807	{	863	{
808	#ifdef _WIN32	864	#ifdef _WIN32
809	return _get_osfhandle (fd) != -1;	865	return _get_osfhandle (fd) != -1;
810	#else	866	#else
…		…
873	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	929	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
874	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	930	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
875	#define UPHEAP_DONE(p,k) ((p) == (k))	931	#define UPHEAP_DONE(p,k) ((p) == (k))
876		932
877	/* away from the root */	933	/* away from the root */
878	void inline_speed	934	inline_speed void
879	downheap (ANHE *heap, int N, int k)	935	downheap (ANHE *heap, int N, int k)
880	{	936	{
881	ANHE he = heap [k];	937	ANHE he = heap [k];
882	ANHE *E = heap + N + HEAP0;	938	ANHE *E = heap + N + HEAP0;
883		939
…		…
923	#define HEAP0 1	979	#define HEAP0 1
924	#define HPARENT(k) ((k) >> 1)	980	#define HPARENT(k) ((k) >> 1)
925	#define UPHEAP_DONE(p,k) (!(p))	981	#define UPHEAP_DONE(p,k) (!(p))
926		982
927	/* away from the root */	983	/* away from the root */
928	void inline_speed	984	inline_speed void
929	downheap (ANHE *heap, int N, int k)	985	downheap (ANHE *heap, int N, int k)
930	{	986	{
931	ANHE he = heap [k];	987	ANHE he = heap [k];
932		988
933	for (;;)	989	for (;;)
…		…
953	ev_active (ANHE_w (he)) = k;	1009	ev_active (ANHE_w (he)) = k;
954	}	1010	}
955	#endif	1011	#endif
956		1012
957	/* towards the root */	1013	/* towards the root */
958	void inline_speed	1014	inline_speed void
959	upheap (ANHE *heap, int k)	1015	upheap (ANHE *heap, int k)
960	{	1016	{
961	ANHE he = heap [k];	1017	ANHE he = heap [k];
962		1018
963	for (;;)	1019	for (;;)
…		…
974		1030
975	heap [k] = he;	1031	heap [k] = he;
976	ev_active (ANHE_w (he)) = k;	1032	ev_active (ANHE_w (he)) = k;
977	}	1033	}
978		1034
979	void inline_size	1035	/* move an element suitably so it is in a correct place */
		1036	inline_size void
980	adjustheap (ANHE *heap, int N, int k)	1037	adjustheap (ANHE *heap, int N, int k)
981	{	1038	{
982	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1039	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
983	upheap (heap, k);	1040	upheap (heap, k);
984	else	1041	else
985	downheap (heap, N, k);	1042	downheap (heap, N, k);
986	}	1043	}
987		1044
988	/* rebuild the heap: this function is used only once and executed rarely */	1045	/* rebuild the heap: this function is used only once and executed rarely */
989	void inline_size	1046	inline_size void
990	reheap (ANHE *heap, int N)	1047	reheap (ANHE *heap, int N)
991	{	1048	{
992	int i;	1049	int i;
993		1050
994	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1051	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
997	upheap (heap, i + HEAP0);	1054	upheap (heap, i + HEAP0);
998	}	1055	}
999		1056
1000	/*****************************************************************************/	1057	/*****************************************************************************/
1001		1058
		1059	/* associate signal watchers to a signal signal */
1002	typedef struct	1060	typedef struct
1003	{	1061	{
1004	WL head;	1062	WL head;
1005	EV_ATOMIC_T gotsig;	1063	EV_ATOMIC_T gotsig;
1006	} ANSIG;	1064	} ANSIG;
…		…
1010		1068
1011	static EV_ATOMIC_T gotsig;	1069	static EV_ATOMIC_T gotsig;
1012		1070
1013	/*****************************************************************************/	1071	/*****************************************************************************/
1014		1072
1015	void inline_speed	1073	/* used to prepare libev internal fd's */
		1074	/* this is not fork-safe */
		1075	inline_speed void
1016	fd_intern (int fd)	1076	fd_intern (int fd)
1017	{	1077	{
1018	#ifdef _WIN32	1078	#ifdef _WIN32
1019	unsigned long arg = 1;	1079	unsigned long arg = 1;
1020	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1080	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
1025	}	1085	}
1026		1086
1027	static void noinline	1087	static void noinline
1028	evpipe_init (EV_P)	1088	evpipe_init (EV_P)
1029	{	1089	{
1030	if (!ev_is_active (&pipeev))	1090	if (!ev_is_active (&pipe_w))
1031	{	1091	{
1032	#if EV_USE_EVENTFD	1092	#if EV_USE_EVENTFD
1033	if ((evfd = eventfd (0, 0)) >= 0)	1093	if ((evfd = eventfd (0, 0)) >= 0)
1034	{	1094	{
1035	evpipe [0] = -1;	1095	evpipe [0] = -1;
1036	fd_intern (evfd);	1096	fd_intern (evfd);
1037	ev_io_set (&pipeev, evfd, EV_READ);	1097	ev_io_set (&pipe_w, evfd, EV_READ);
1038	}	1098	}
1039	else	1099	else
1040	#endif	1100	#endif
1041	{	1101	{
1042	while (pipe (evpipe))	1102	while (pipe (evpipe))
1043	ev_syserr ("(libev) error creating signal/async pipe");	1103	ev_syserr ("(libev) error creating signal/async pipe");
1044		1104
1045	fd_intern (evpipe [0]);	1105	fd_intern (evpipe [0]);
1046	fd_intern (evpipe [1]);	1106	fd_intern (evpipe [1]);
1047	ev_io_set (&pipeev, evpipe [0], EV_READ);	1107	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1048	}	1108	}
1049		1109
1050	ev_io_start (EV_A_ &pipeev);	1110	ev_io_start (EV_A_ &pipe_w);
1051	ev_unref (EV_A); /* watcher should not keep loop alive */	1111	ev_unref (EV_A); /* watcher should not keep loop alive */
1052	}	1112	}
1053	}	1113	}
1054		1114
1055	void inline_size	1115	inline_size void
1056	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1116	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1057	{	1117	{
1058	if (!*flag)	1118	if (!*flag)
1059	{	1119	{
1060	int old_errno = errno; /* save errno because write might clobber it */	1120	int old_errno = errno; /* save errno because write might clobber it */
…		…
1073		1133
1074	errno = old_errno;	1134	errno = old_errno;
1075	}	1135	}
1076	}	1136	}
1077		1137
		1138	/* called whenever the libev signal pipe */
		1139	/* got some events (signal, async) */
1078	static void	1140	static void
1079	pipecb (EV_P_ ev_io *iow, int revents)	1141	pipecb (EV_P_ ev_io *iow, int revents)
1080	{	1142	{
1081	#if EV_USE_EVENTFD	1143	#if EV_USE_EVENTFD
1082	if (evfd >= 0)	1144	if (evfd >= 0)
…		…
1164		1226
1165	#ifndef WIFCONTINUED	1227	#ifndef WIFCONTINUED
1166	# define WIFCONTINUED(status) 0	1228	# define WIFCONTINUED(status) 0
1167	#endif	1229	#endif
1168		1230
1169	void inline_speed	1231	/* handle a single child status event */
		1232	inline_speed void
1170	child_reap (EV_P_ int chain, int pid, int status)	1233	child_reap (EV_P_ int chain, int pid, int status)
1171	{	1234	{
1172	ev_child *w;	1235	ev_child *w;
1173	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);	1236	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
1174		1237
…		…
1187		1250
1188	#ifndef WCONTINUED	1251	#ifndef WCONTINUED
1189	# define WCONTINUED 0	1252	# define WCONTINUED 0
1190	#endif	1253	#endif
1191		1254
		1255	/* called on sigchld etc., calls waitpid */
1192	static void	1256	static void
1193	childcb (EV_P_ ev_signal *sw, int revents)	1257	childcb (EV_P_ ev_signal *sw, int revents)
1194	{	1258	{
1195	int pid, status;	1259	int pid, status;
1196		1260
…		…
1303	ev_backend (EV_P)	1367	ev_backend (EV_P)
1304	{	1368	{
1305	return backend;	1369	return backend;
1306	}	1370	}
1307		1371
		1372	#if EV_MINIMAL < 2
1308	unsigned int	1373	unsigned int
1309	ev_loop_count (EV_P)	1374	ev_loop_count (EV_P)
1310	{	1375	{
1311	return loop_count;	1376	return loop_count;
1312	}	1377	}
1313		1378
		1379	unsigned int
		1380	ev_loop_depth (EV_P)
		1381	{
		1382	return loop_depth;
		1383	}
		1384
1314	void	1385	void
1315	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1386	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1316	{	1387	{
1317	io_blocktime = interval;	1388	io_blocktime = interval;
1318	}	1389	}
…		…
1321	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1392	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1322	{	1393	{
1323	timeout_blocktime = interval;	1394	timeout_blocktime = interval;
1324	}	1395	}
1325		1396
		1397	void
		1398	ev_set_userdata (EV_P_ void *data)
		1399	{
		1400	userdata = data;
		1401	}
		1402
		1403	void *
		1404	ev_userdata (EV_P)
		1405	{
		1406	return userdata;
		1407	}
		1408
		1409	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1410	{
		1411	invoke_cb = invoke_pending_cb;
		1412	}
		1413
		1414	void ev_set_blocking_cb (EV_P_ void (suspend_cb_)(EV_P), void (resume_cb_)(EV_P))
		1415	{
		1416	suspend_cb = suspend_cb_;
		1417	resume_cb = resume_cb_;
		1418	}
		1419	#endif
		1420
		1421	/* initialise a loop structure, must be zero-initialised */
1326	static void noinline	1422	static void noinline
1327	loop_init (EV_P_ unsigned int flags)	1423	loop_init (EV_P_ unsigned int flags)
1328	{	1424	{
1329	if (!backend)	1425	if (!backend)
1330	{	1426	{
…		…
1350		1446
1351	ev_rt_now = ev_time ();	1447	ev_rt_now = ev_time ();
1352	mn_now = get_clock ();	1448	mn_now = get_clock ();
1353	now_floor = mn_now;	1449	now_floor = mn_now;
1354	rtmn_diff = ev_rt_now - mn_now;	1450	rtmn_diff = ev_rt_now - mn_now;
		1451	#if EV_MINIMAL < 2
		1452	invoke_cb = ev_invoke_pending;
		1453	#endif
1355		1454
1356	io_blocktime = 0.;	1455	io_blocktime = 0.;
1357	timeout_blocktime = 0.;	1456	timeout_blocktime = 0.;
1358	backend = 0;	1457	backend = 0;
1359	backend_fd = -1;	1458	backend_fd = -1;
…		…
1390	#endif	1489	#endif
1391	#if EV_USE_SELECT	1490	#if EV_USE_SELECT
1392	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1491	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1393	#endif	1492	#endif
1394		1493
		1494	ev_prepare_init (&pending_w, pendingcb);
		1495
1395	ev_init (&pipeev, pipecb);	1496	ev_init (&pipe_w, pipecb);
1396	ev_set_priority (&pipeev, EV_MAXPRI);	1497	ev_set_priority (&pipe_w, EV_MAXPRI);
1397	}	1498	}
1398	}	1499	}
1399		1500
		1501	/* free up a loop structure */
1400	static void noinline	1502	static void noinline
1401	loop_destroy (EV_P)	1503	loop_destroy (EV_P)
1402	{	1504	{
1403	int i;	1505	int i;
1404		1506
1405	if (ev_is_active (&pipeev))	1507	if (ev_is_active (&pipe_w))
1406	{	1508	{
1407	ev_ref (EV_A); /* signal watcher */	1509	ev_ref (EV_A); /* signal watcher */
1408	ev_io_stop (EV_A_ &pipeev);	1510	ev_io_stop (EV_A_ &pipe_w);
1409		1511
1410	#if EV_USE_EVENTFD	1512	#if EV_USE_EVENTFD
1411	if (evfd >= 0)	1513	if (evfd >= 0)
1412	close (evfd);	1514	close (evfd);
1413	#endif	1515	#endif
…		…
1452	}	1554	}
1453		1555
1454	ev_free (anfds); anfdmax = 0;	1556	ev_free (anfds); anfdmax = 0;
1455		1557
1456	/* have to use the microsoft-never-gets-it-right macro */	1558	/* have to use the microsoft-never-gets-it-right macro */
		1559	array_free (rfeed, EMPTY);
1457	array_free (fdchange, EMPTY);	1560	array_free (fdchange, EMPTY);
1458	array_free (timer, EMPTY);	1561	array_free (timer, EMPTY);
1459	#if EV_PERIODIC_ENABLE	1562	#if EV_PERIODIC_ENABLE
1460	array_free (periodic, EMPTY);	1563	array_free (periodic, EMPTY);
1461	#endif	1564	#endif
…		…
1470		1573
1471	backend = 0;	1574	backend = 0;
1472	}	1575	}
1473		1576
1474	#if EV_USE_INOTIFY	1577	#if EV_USE_INOTIFY
1475	void inline_size infy_fork (EV_P);	1578	inline_size void infy_fork (EV_P);
1476	#endif	1579	#endif
1477		1580
1478	void inline_size	1581	inline_size void
1479	loop_fork (EV_P)	1582	loop_fork (EV_P)
1480	{	1583	{
1481	#if EV_USE_PORT	1584	#if EV_USE_PORT
1482	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1585	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1483	#endif	1586	#endif
…		…
1489	#endif	1592	#endif
1490	#if EV_USE_INOTIFY	1593	#if EV_USE_INOTIFY
1491	infy_fork (EV_A);	1594	infy_fork (EV_A);
1492	#endif	1595	#endif
1493		1596
1494	if (ev_is_active (&pipeev))	1597	if (ev_is_active (&pipe_w))
1495	{	1598	{
1496	/* this "locks" the handlers against writing to the pipe */	1599	/* this "locks" the handlers against writing to the pipe */
1497	/* while we modify the fd vars */	1600	/* while we modify the fd vars */
1498	gotsig = 1;	1601	gotsig = 1;
1499	#if EV_ASYNC_ENABLE	1602	#if EV_ASYNC_ENABLE
1500	gotasync = 1;	1603	gotasync = 1;
1501	#endif	1604	#endif
1502		1605
1503	ev_ref (EV_A);	1606	ev_ref (EV_A);
1504	ev_io_stop (EV_A_ &pipeev);	1607	ev_io_stop (EV_A_ &pipe_w);
1505		1608
1506	#if EV_USE_EVENTFD	1609	#if EV_USE_EVENTFD
1507	if (evfd >= 0)	1610	if (evfd >= 0)
1508	close (evfd);	1611	close (evfd);
1509	#endif	1612	#endif
…		…
1514	close (evpipe [1]);	1617	close (evpipe [1]);
1515	}	1618	}
1516		1619
1517	evpipe_init (EV_A);	1620	evpipe_init (EV_A);
1518	/* now iterate over everything, in case we missed something */	1621	/* now iterate over everything, in case we missed something */
1519	pipecb (EV_A_ &pipeev, EV_READ);	1622	pipecb (EV_A_ &pipe_w, EV_READ);
1520	}	1623	}
1521		1624
1522	postfork = 0;	1625	postfork = 0;
1523	}	1626	}
1524		1627
…		…
1549	void	1652	void
1550	ev_loop_fork (EV_P)	1653	ev_loop_fork (EV_P)
1551	{	1654	{
1552	postfork = 1; /* must be in line with ev_default_fork */	1655	postfork = 1; /* must be in line with ev_default_fork */
1553	}	1656	}
		1657	#endif /* multiplicity */
1554		1658
1555	#if EV_VERIFY	1659	#if EV_VERIFY
1556	static void noinline	1660	static void noinline
1557	verify_watcher (EV_P_ W w)	1661	verify_watcher (EV_P_ W w)
1558	{	1662	{
…		…
1586	verify_watcher (EV_A_ ws [cnt]);	1690	verify_watcher (EV_A_ ws [cnt]);
1587	}	1691	}
1588	}	1692	}
1589	#endif	1693	#endif
1590		1694
		1695	#if EV_MINIMAL < 2
1591	void	1696	void
1592	ev_loop_verify (EV_P)	1697	ev_loop_verify (EV_P)
1593	{	1698	{
1594	#if EV_VERIFY	1699	#if EV_VERIFY
1595	int i;	1700	int i;
…		…
1648	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1753	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)	1754	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1650	# endif	1755	# endif
1651	#endif	1756	#endif
1652	}	1757	}
1653		1758	#endif
1654	#endif /* multiplicity */
1655		1759
1656	#if EV_MULTIPLICITY	1760	#if EV_MULTIPLICITY
1657	struct ev_loop *	1761	struct ev_loop *
1658	ev_default_loop_init (unsigned int flags)	1762	ev_default_loop_init (unsigned int flags)
1659	#else	1763	#else
…		…
1720	ev_invoke (EV_P_ void *w, int revents)	1824	ev_invoke (EV_P_ void *w, int revents)
1721	{	1825	{
1722	EV_CB_INVOKE ((W)w, revents);	1826	EV_CB_INVOKE ((W)w, revents);
1723	}	1827	}
1724		1828
1725	void inline_speed	1829	void noinline
1726	call_pending (EV_P)	1830	ev_invoke_pending (EV_P)
1727	{	1831	{
1728	int pri;	1832	int pri;
1729		1833
1730	for (pri = NUMPRI; pri--; )	1834	for (pri = NUMPRI; pri--; )
1731	while (pendingcnt [pri])	1835	while (pendingcnt [pri])
1732	{	1836	{
1733	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1837	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1734		1838
1735	if (expect_true (p->w))
1736	{
1737	/assert (("libev: non-pending watcher on pending list", p->w->pending));/	1839	/assert (("libev: non-pending watcher on pending list", p->w->pending));/
		1840	/* ^ this is no longer true, as pending_w could be here */
1738		1841
1739	p->w->pending = 0;	1842	p->w->pending = 0;
1740	EV_CB_INVOKE (p->w, p->events);	1843	EV_CB_INVOKE (p->w, p->events);
1741	EV_FREQUENT_CHECK;	1844	EV_FREQUENT_CHECK;
1742	}
1743	}	1845	}
1744	}	1846	}
1745		1847
1746	#if EV_IDLE_ENABLE	1848	#if EV_IDLE_ENABLE
1747	void inline_size	1849	/* make idle watchers pending. this handles the "call-idle */
		1850	/* only when higher priorities are idle" logic */
		1851	inline_size void
1748	idle_reify (EV_P)	1852	idle_reify (EV_P)
1749	{	1853	{
1750	if (expect_false (idleall))	1854	if (expect_false (idleall))
1751	{	1855	{
1752	int pri;	1856	int pri;
…		…
1764	}	1868	}
1765	}	1869	}
1766	}	1870	}
1767	#endif	1871	#endif
1768		1872
1769	void inline_size	1873	/* make timers pending */
		1874	inline_size void
1770	timers_reify (EV_P)	1875	timers_reify (EV_P)
1771	{	1876	{
1772	EV_FREQUENT_CHECK;	1877	EV_FREQUENT_CHECK;
1773		1878
1774	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	1879	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1775	{	1880	{
1776	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);	1881	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	{	1882	{
		1883	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);
		1884
		1885	/assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));/
		1886
		1887	/* first reschedule or stop timer */
		1888	if (w->repeat)
		1889	{
1783	ev_at (w) += w->repeat;	1890	ev_at (w) += w->repeat;
1784	if (ev_at (w) < mn_now)	1891	if (ev_at (w) < mn_now)
1785	ev_at (w) = mn_now;	1892	ev_at (w) = mn_now;
1786		1893
1787	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1894	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1788		1895
1789	ANHE_at_cache (timers [HEAP0]);	1896	ANHE_at_cache (timers [HEAP0]);
1790	downheap (timers, timercnt, HEAP0);	1897	downheap (timers, timercnt, HEAP0);
		1898	}
		1899	else
		1900	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1901
		1902	EV_FREQUENT_CHECK;
		1903	feed_reverse (EV_A_ (W)w);
1791	}	1904	}
1792	else	1905	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1793	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1794		1906
1795	EV_FREQUENT_CHECK;
1796	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1907	feed_reverse_done (EV_A_ EV_TIMEOUT);
1797	}	1908	}
1798	}	1909	}
1799		1910
1800	#if EV_PERIODIC_ENABLE	1911	#if EV_PERIODIC_ENABLE
1801	void inline_size	1912	/* make periodics pending */
		1913	inline_size void
1802	periodics_reify (EV_P)	1914	periodics_reify (EV_P)
1803	{	1915	{
1804	EV_FREQUENT_CHECK;	1916	EV_FREQUENT_CHECK;
1805		1917
1806	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	1918	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1807	{	1919	{
1808	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);	1920	int feed_count = 0;
1809		1921
1810	/assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));/	1922	do
1811
1812	/* first reschedule or stop timer */
1813	if (w->reschedule_cb)
1814	{	1923	{
		1924	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);
		1925
		1926	/assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));/
		1927
		1928	/* first reschedule or stop timer */
		1929	if (w->reschedule_cb)
		1930	{
1815	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	1931	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1816		1932
1817	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	1933	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1818		1934
1819	ANHE_at_cache (periodics [HEAP0]);	1935	ANHE_at_cache (periodics [HEAP0]);
1820	downheap (periodics, periodiccnt, HEAP0);	1936	downheap (periodics, periodiccnt, HEAP0);
		1937	}
		1938	else if (w->interval)
		1939	{
		1940	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1941	/* if next trigger time is not sufficiently in the future, put it there */
		1942	/* this might happen because of floating point inexactness */
		1943	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1944	{
		1945	ev_at (w) += w->interval;
		1946
		1947	/* if interval is unreasonably low we might still have a time in the past */
		1948	/* so correct this. this will make the periodic very inexact, but the user */
		1949	/* has effectively asked to get triggered more often than possible */
		1950	if (ev_at (w) < ev_rt_now)
		1951	ev_at (w) = ev_rt_now;
		1952	}
		1953
		1954	ANHE_at_cache (periodics [HEAP0]);
		1955	downheap (periodics, periodiccnt, HEAP0);
		1956	}
		1957	else
		1958	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1959
		1960	EV_FREQUENT_CHECK;
		1961	feed_reverse (EV_A_ (W)w);
1821	}	1962	}
1822	else if (w->interval)	1963	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		1964
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);	1965	feed_reverse_done (EV_A_ EV_PERIODIC);
1846	}	1966	}
1847	}	1967	}
1848		1968
		1969	/* simply recalculate all periodics */
		1970	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1849	static void noinline	1971	static void noinline
1850	periodics_reschedule (EV_P)	1972	periodics_reschedule (EV_P)
1851	{	1973	{
1852	int i;	1974	int i;
1853		1975
…		…
1866		1988
1867	reheap (periodics, periodiccnt);	1989	reheap (periodics, periodiccnt);
1868	}	1990	}
1869	#endif	1991	#endif
1870		1992
1871	void inline_speed	1993	/* adjust all timers by a given offset */
		1994	static void noinline
		1995	timers_reschedule (EV_P_ ev_tstamp adjust)
		1996	{
		1997	int i;
		1998
		1999	for (i = 0; i < timercnt; ++i)
		2000	{
		2001	ANHE *he = timers + i + HEAP0;
		2002	ANHE_w (*he)->at += adjust;
		2003	ANHE_at_cache (*he);
		2004	}
		2005	}
		2006
		2007	/* fetch new monotonic and realtime times from the kernel */
		2008	/* also detetc if there was a timejump, and act accordingly */
		2009	inline_speed void
1872	time_update (EV_P_ ev_tstamp max_block)	2010	time_update (EV_P_ ev_tstamp max_block)
1873	{	2011	{
1874	int i;
1875
1876	#if EV_USE_MONOTONIC	2012	#if EV_USE_MONOTONIC
1877	if (expect_true (have_monotonic))	2013	if (expect_true (have_monotonic))
1878	{	2014	{
		2015	int i;
1879	ev_tstamp odiff = rtmn_diff;	2016	ev_tstamp odiff = rtmn_diff;
1880		2017
1881	mn_now = get_clock ();	2018	mn_now = get_clock ();
1882		2019
1883	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /	2020	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
…		…
1909	ev_rt_now = ev_time ();	2046	ev_rt_now = ev_time ();
1910	mn_now = get_clock ();	2047	mn_now = get_clock ();
1911	now_floor = mn_now;	2048	now_floor = mn_now;
1912	}	2049	}
1913		2050
		2051	/* no timer adjustment, as the monotonic clock doesn't jump */
		2052	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1914	# if EV_PERIODIC_ENABLE	2053	# if EV_PERIODIC_ENABLE
1915	periodics_reschedule (EV_A);	2054	periodics_reschedule (EV_A);
1916	# endif	2055	# endif
1917	/* no timer adjustment, as the monotonic clock doesn't jump */
1918	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1919	}	2056	}
1920	else	2057	else
1921	#endif	2058	#endif
1922	{	2059	{
1923	ev_rt_now = ev_time ();	2060	ev_rt_now = ev_time ();
1924		2061
1925	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2062	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1926	{	2063	{
		2064	/* adjust timers. this is easy, as the offset is the same for all of them */
		2065	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1927	#if EV_PERIODIC_ENABLE	2066	#if EV_PERIODIC_ENABLE
1928	periodics_reschedule (EV_A);	2067	periodics_reschedule (EV_A);
1929	#endif	2068	#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	}	2069	}
1938		2070
1939	mn_now = ev_rt_now;	2071	mn_now = ev_rt_now;
1940	}	2072	}
1941	}	2073	}
1942		2074
1943	void	2075	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)	2076	ev_loop (EV_P_ int flags)
1965	{	2077	{
		2078	#if EV_MINIMAL < 2
		2079	++loop_depth;
		2080	#endif
		2081
1966	loop_done = EVUNLOOP_CANCEL;	2082	loop_done = EVUNLOOP_CANCEL;
1967		2083
1968	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2084	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1969		2085
1970	do	2086	do
1971	{	2087	{
1972	#if EV_VERIFY >= 2	2088	#if EV_VERIFY >= 2
1973	ev_loop_verify (EV_A);	2089	ev_loop_verify (EV_A);
…		…
1986	/* we might have forked, so queue fork handlers */	2102	/* we might have forked, so queue fork handlers */
1987	if (expect_false (postfork))	2103	if (expect_false (postfork))
1988	if (forkcnt)	2104	if (forkcnt)
1989	{	2105	{
1990	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2106	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1991	call_pending (EV_A);	2107	EV_INVOKE_PENDING;
1992	}	2108	}
1993	#endif	2109	#endif
1994		2110
1995	/* queue prepare watchers (and execute them) */	2111	/* queue prepare watchers (and execute them) */
1996	if (expect_false (preparecnt))	2112	if (expect_false (preparecnt))
1997	{	2113	{
1998	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2114	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1999	call_pending (EV_A);	2115	EV_INVOKE_PENDING;
2000	}	2116	}
2001		2117
2002	/* we might have forked, so reify kernel state if necessary */	2118	/* we might have forked, so reify kernel state if necessary */
2003	if (expect_false (postfork))	2119	if (expect_false (postfork))
2004	loop_fork (EV_A);	2120	loop_fork (EV_A);
…		…
2011	ev_tstamp waittime = 0.;	2127	ev_tstamp waittime = 0.;
2012	ev_tstamp sleeptime = 0.;	2128	ev_tstamp sleeptime = 0.;
2013		2129
2014	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))	2130	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
2015	{	2131	{
		2132	/* remember old timestamp for io_blocktime calculation */
		2133	ev_tstamp prev_mn_now = mn_now;
		2134
2016	/* update time to cancel out callback processing overhead */	2135	/* update time to cancel out callback processing overhead */
2017	time_update (EV_A_ 1e100);	2136	time_update (EV_A_ 1e100);
2018		2137
2019	waittime = MAX_BLOCKTIME;	2138	waittime = MAX_BLOCKTIME;
2020		2139
…		…
2030	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2149	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2031	if (waittime > to) waittime = to;	2150	if (waittime > to) waittime = to;
2032	}	2151	}
2033	#endif	2152	#endif
2034		2153
		2154	/* don't let timeouts decrease the waittime below timeout_blocktime */
2035	if (expect_false (waittime < timeout_blocktime))	2155	if (expect_false (waittime < timeout_blocktime))
2036	waittime = timeout_blocktime;	2156	waittime = timeout_blocktime;
2037		2157
2038	sleeptime = waittime - backend_fudge;	2158	/* extra check because io_blocktime is commonly 0 */
2039
2040	if (expect_true (sleeptime > io_blocktime))	2159	if (expect_false (io_blocktime))
2041	sleeptime = io_blocktime;
2042
2043	if (sleeptime)
2044	{	2160	{
		2161	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2162
		2163	if (sleeptime > waittime - backend_fudge)
		2164	sleeptime = waittime - backend_fudge;
		2165
		2166	if (expect_true (sleeptime > 0.))
		2167	{
2045	ev_sleep (sleeptime);	2168	ev_sleep (sleeptime);
2046	waittime -= sleeptime;	2169	waittime -= sleeptime;
		2170	}
2047	}	2171	}
2048	}	2172	}
2049		2173
		2174	#if EV_MINIMAL < 2
2050	++loop_count;	2175	++loop_count;
		2176	#endif
2051	backend_poll (EV_A_ waittime);	2177	backend_poll (EV_A_ waittime);
2052		2178
2053	/* update ev_rt_now, do magic */	2179	/* update ev_rt_now, do magic */
2054	time_update (EV_A_ waittime + sleeptime);	2180	time_update (EV_A_ waittime + sleeptime);
2055	}	2181	}
…		…
2067		2193
2068	/* queue check watchers, to be executed first */	2194	/* queue check watchers, to be executed first */
2069	if (expect_false (checkcnt))	2195	if (expect_false (checkcnt))
2070	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2196	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2071		2197
2072	call_pending (EV_A);	2198	EV_INVOKE_PENDING;
2073	}	2199	}
2074	while (expect_true (	2200	while (expect_true (
2075	activecnt	2201	activecnt
2076	&& !loop_done	2202	&& !loop_done
2077	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))	2203	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
2078	));	2204	));
2079		2205
2080	if (loop_done == EVUNLOOP_ONE)	2206	if (loop_done == EVUNLOOP_ONE)
2081	loop_done = EVUNLOOP_CANCEL;	2207	loop_done = EVUNLOOP_CANCEL;
		2208
		2209	#if EV_MINIMAL < 2
		2210	--loop_depth;
		2211	#endif
2082	}	2212	}
2083		2213
2084	void	2214	void
2085	ev_unloop (EV_P_ int how)	2215	ev_unloop (EV_P_ int how)
2086	{	2216	{
2087	loop_done = how;	2217	loop_done = how;
2088	}	2218	}
2089		2219
		2220	void
		2221	ev_ref (EV_P)
		2222	{
		2223	++activecnt;
		2224	}
		2225
		2226	void
		2227	ev_unref (EV_P)
		2228	{
		2229	--activecnt;
		2230	}
		2231
		2232	void
		2233	ev_now_update (EV_P)
		2234	{
		2235	time_update (EV_A_ 1e100);
		2236	}
		2237
		2238	void
		2239	ev_suspend (EV_P)
		2240	{
		2241	ev_now_update (EV_A);
		2242	}
		2243
		2244	void
		2245	ev_resume (EV_P)
		2246	{
		2247	ev_tstamp mn_prev = mn_now;
		2248
		2249	ev_now_update (EV_A);
		2250	timers_reschedule (EV_A_ mn_now - mn_prev);
		2251	#if EV_PERIODIC_ENABLE
		2252	/* TODO: really do this? */
		2253	periodics_reschedule (EV_A);
		2254	#endif
		2255	}
		2256
2090	/*****************************************************************************/	2257	/*****************************************************************************/
		2258	/* singly-linked list management, used when the expected list length is short */
2091		2259
2092	void inline_size	2260	inline_size void
2093	wlist_add (WL *head, WL elem)	2261	wlist_add (WL *head, WL elem)
2094	{	2262	{
2095	elem->next = *head;	2263	elem->next = *head;
2096	*head = elem;	2264	*head = elem;
2097	}	2265	}
2098		2266
2099	void inline_size	2267	inline_size void
2100	wlist_del (WL *head, WL elem)	2268	wlist_del (WL *head, WL elem)
2101	{	2269	{
2102	while (*head)	2270	while (*head)
2103	{	2271	{
2104	if (*head == elem)	2272	if (*head == elem)
…		…
2109		2277
2110	head = &(*head)->next;	2278	head = &(*head)->next;
2111	}	2279	}
2112	}	2280	}
2113		2281
2114	void inline_speed	2282	/* internal, faster, version of ev_clear_pending */
		2283	inline_speed void
2115	clear_pending (EV_P_ W w)	2284	clear_pending (EV_P_ W w)
2116	{	2285	{
2117	if (w->pending)	2286	if (w->pending)
2118	{	2287	{
2119	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2288	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2120	w->pending = 0;	2289	w->pending = 0;
2121	}	2290	}
2122	}	2291	}
2123		2292
2124	int	2293	int
…		…
2128	int pending = w_->pending;	2297	int pending = w_->pending;
2129		2298
2130	if (expect_true (pending))	2299	if (expect_true (pending))
2131	{	2300	{
2132	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2301	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2302	p->w = (W)&pending_w;
2133	w_->pending = 0;	2303	w_->pending = 0;
2134	p->w = 0;
2135	return p->events;	2304	return p->events;
2136	}	2305	}
2137	else	2306	else
2138	return 0;	2307	return 0;
2139	}	2308	}
2140		2309
2141	void inline_size	2310	inline_size void
2142	pri_adjust (EV_P_ W w)	2311	pri_adjust (EV_P_ W w)
2143	{	2312	{
2144	int pri = w->priority;	2313	int pri = ev_priority (w);
2145	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2314	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2146	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2315	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2147	w->priority = pri;	2316	ev_set_priority (w, pri);
2148	}	2317	}
2149		2318
2150	void inline_speed	2319	inline_speed void
2151	ev_start (EV_P_ W w, int active)	2320	ev_start (EV_P_ W w, int active)
2152	{	2321	{
2153	pri_adjust (EV_A_ w);	2322	pri_adjust (EV_A_ w);
2154	w->active = active;	2323	w->active = active;
2155	ev_ref (EV_A);	2324	ev_ref (EV_A);
2156	}	2325	}
2157		2326
2158	void inline_size	2327	inline_size void
2159	ev_stop (EV_P_ W w)	2328	ev_stop (EV_P_ W w)
2160	{	2329	{
2161	ev_unref (EV_A);	2330	ev_unref (EV_A);
2162	w->active = 0;	2331	w->active = 0;
2163	}	2332	}
…		…
2588		2757
2589	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2758	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2590	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2759	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2591	}	2760	}
2592		2761
2593	void inline_size	2762	inline_size void
2594	check_2625 (EV_P)	2763	check_2625 (EV_P)
2595	{	2764	{
2596	/* kernels < 2.6.25 are borked	2765	/* kernels < 2.6.25 are borked
2597	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2766	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2598	*/	2767	*/
…		…
2611	return;	2780	return;
2612		2781
2613	fs_2625 = 1;	2782	fs_2625 = 1;
2614	}	2783	}
2615		2784
2616	void inline_size	2785	inline_size void
2617	infy_init (EV_P)	2786	infy_init (EV_P)
2618	{	2787	{
2619	if (fs_fd != -2)	2788	if (fs_fd != -2)
2620	return;	2789	return;
2621		2790
…		…
2631	ev_set_priority (&fs_w, EV_MAXPRI);	2800	ev_set_priority (&fs_w, EV_MAXPRI);
2632	ev_io_start (EV_A_ &fs_w);	2801	ev_io_start (EV_A_ &fs_w);
2633	}	2802	}
2634	}	2803	}
2635		2804
2636	void inline_size	2805	inline_size void
2637	infy_fork (EV_P)	2806	infy_fork (EV_P)
2638	{	2807	{
2639	int slot;	2808	int slot;
2640		2809
2641	if (fs_fd < 0)	2810	if (fs_fd < 0)
…		…
3145	}	3314	}
3146	}	3315	}
3147		3316
3148	/*****************************************************************************/	3317	/*****************************************************************************/
3149		3318
3150	#if 0	3319	#if EV_WALK_ENABLE
3151	void	3320	void
3152	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3321	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3153	{	3322	{
3154	int i, j;	3323	int i, j;
3155	ev_watcher_list wl, wn;	3324	ev_watcher_list wl, wn;
…		…
3171	#if EV_USE_INOTIFY	3340	#if EV_USE_INOTIFY
3172	if (ev_cb ((ev_io *)wl) == infy_cb)	3341	if (ev_cb ((ev_io *)wl) == infy_cb)
3173	;	3342	;
3174	else	3343	else
3175	#endif	3344	#endif
3176	if ((ev_io *)wl != &pipeev)	3345	if ((ev_io *)wl != &pipe_w)
3177	if (types & EV_IO)	3346	if (types & EV_IO)
3178	cb (EV_A_ EV_IO, wl);	3347	cb (EV_A_ EV_IO, wl);
3179		3348
3180	wl = wn;	3349	wl = wn;
3181	}	3350	}

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Comparing libev/ev.c (file contents): Revision 1.283 by root, Wed Apr 15 09:51:19 2009 UTC vs. Revision 1.297 by root, Fri Jul 10 00:36:21 2009 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.283 by root, Wed Apr 15 09:51:19 2009 UTC vs.
Revision 1.297 by root, Fri Jul 10 00:36:21 2009 UTC