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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 1.314 by root, Wed Aug 26 17:31:20 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
…		…
131	# else	133	# else
132	# define EV_USE_INOTIFY 0	134	# define EV_USE_INOTIFY 0
133	# endif	135	# endif
134	# endif	136	# endif
135		137
		138	# ifndef EV_USE_SIGNALFD
		139	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
		140	# define EV_USE_SIGNALFD 1
		141	# else
		142	# define EV_USE_SIGNALFD 0
		143	# endif
		144	# endif
		145
136	# ifndef EV_USE_EVENTFD	146	# ifndef EV_USE_EVENTFD
137	# if HAVE_EVENTFD	147	# if HAVE_EVENTFD
138	# define EV_USE_EVENTFD 1	148	# define EV_USE_EVENTFD 1
139	# else	149	# else
140	# define EV_USE_EVENTFD 0	150	# define EV_USE_EVENTFD 0
…		…
176	# endif	186	# endif
177	#endif	187	#endif
178		188
179	/* this block tries to deduce configuration from header-defined symbols and defaults */	189	/* this block tries to deduce configuration from header-defined symbols and defaults */
180		190
		191	/* try to deduce the maximum number of signals on this platform */
		192	#if defined (EV_NSIG)
		193	/* use what's provided */
		194	#elif defined (NSIG)
		195	# define EV_NSIG (NSIG)
		196	#elif defined(_NSIG)
		197	# define EV_NSIG (_NSIG)
		198	#elif defined (SIGMAX)
		199	# define EV_NSIG (SIGMAX+1)
		200	#elif defined (SIG_MAX)
		201	# define EV_NSIG (SIG_MAX+1)
		202	#elif defined (_SIG_MAX)
		203	# define EV_NSIG (_SIG_MAX+1)
		204	#elif defined (MAXSIG)
		205	# define EV_NSIG (MAXSIG+1)
		206	#elif defined (MAX_SIG)
		207	# define EV_NSIG (MAX_SIG+1)
		208	#elif defined (SIGARRAYSIZE)
		209	# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
		210	#elif defined (_sys_nsig)
		211	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		212	#else
		213	# error "unable to find value for NSIG, please report"
		214	/* to make it compile regardless, just remove the above line */
		215	# define EV_NSIG 65
		216	#endif
		217
181	#ifndef EV_USE_CLOCK_SYSCALL	218	#ifndef EV_USE_CLOCK_SYSCALL
182	# if __linux && __GLIBC__ >= 2	219	# if __linux && __GLIBC__ >= 2
183	# define EV_USE_CLOCK_SYSCALL 1	220	# define EV_USE_CLOCK_SYSCALL 1
184	# else	221	# else
185	# define EV_USE_CLOCK_SYSCALL 0	222	# define EV_USE_CLOCK_SYSCALL 0
…		…
264	# else	301	# else
265	# define EV_USE_EVENTFD 0	302	# define EV_USE_EVENTFD 0
266	# endif	303	# endif
267	#endif	304	#endif
268		305
		306	#ifndef EV_USE_SIGNALFD
		307	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		308	# define EV_USE_SIGNALFD 1
		309	# else
		310	# define EV_USE_SIGNALFD 0
		311	# endif
		312	#endif
		313
269	#if 0 /* debugging */	314	#if 0 /* debugging */
270	# define EV_VERIFY 3	315	# define EV_VERIFY 3
271	# define EV_USE_4HEAP 1	316	# define EV_USE_4HEAP 1
272	# define EV_HEAP_CACHE_AT 1	317	# define EV_HEAP_CACHE_AT 1
273	#endif	318	#endif
…		…
280	# define EV_USE_4HEAP !EV_MINIMAL	325	# define EV_USE_4HEAP !EV_MINIMAL
281	#endif	326	#endif
282		327
283	#ifndef EV_HEAP_CACHE_AT	328	#ifndef EV_HEAP_CACHE_AT
284	# define EV_HEAP_CACHE_AT !EV_MINIMAL	329	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		330	#endif
		331
		332	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		333	/* which makes programs even slower. might work on other unices, too. */
		334	#if EV_USE_CLOCK_SYSCALL
		335	# include <syscall.h>
		336	# ifdef SYS_clock_gettime
		337	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		338	# undef EV_USE_MONOTONIC
		339	# define EV_USE_MONOTONIC 1
		340	# else
		341	# undef EV_USE_CLOCK_SYSCALL
		342	# define EV_USE_CLOCK_SYSCALL 0
		343	# endif
285	#endif	344	#endif
286		345
287	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	346	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288		347
289	#ifndef CLOCK_MONOTONIC	348	#ifndef CLOCK_MONOTONIC
…		…
320		379
321	#if EV_SELECT_IS_WINSOCKET	380	#if EV_SELECT_IS_WINSOCKET
322	# include <winsock.h>	381	# include <winsock.h>
323	#endif	382	#endif
324		383
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	384	#if EV_USE_EVENTFD
335	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	385	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336	# include <stdint.h>	386	# include <stdint.h>
		387	# ifndef EFD_NONBLOCK
		388	# define EFD_NONBLOCK O_NONBLOCK
		389	# endif
		390	# ifndef EFD_CLOEXEC
		391	# ifdef O_CLOEXEC
		392	# define EFD_CLOEXEC O_CLOEXEC
		393	# else
		394	# define EFD_CLOEXEC 02000000
		395	# endif
		396	# endif
337	# ifdef __cplusplus	397	# ifdef __cplusplus
338	extern "C" {	398	extern "C" {
339	# endif	399	# endif
340	int eventfd (unsigned int initval, int flags);	400	int eventfd (unsigned int initval, int flags);
341	# ifdef __cplusplus	401	# ifdef __cplusplus
342	}	402	}
343	# endif	403	# endif
344	#endif	404	#endif
		405
		406	#if EV_USE_SIGNALFD
		407	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		408	# include <stdint.h>
		409	# ifndef SFD_NONBLOCK
		410	# define SFD_NONBLOCK O_NONBLOCK
		411	# endif
		412	# ifndef SFD_CLOEXEC
		413	# ifdef O_CLOEXEC
		414	# define SFD_CLOEXEC O_CLOEXEC
		415	# else
		416	# define SFD_CLOEXEC 02000000
		417	# endif
		418	# endif
		419	# ifdef __cplusplus
		420	extern "C" {
		421	# endif
		422	int signalfd (int fd, const sigset_t *mask, int flags);
		423
		424	struct signalfd_siginfo
		425	{
		426	uint32_t ssi_signo;
		427	char pad[128 - sizeof (uint32_t)];
		428	};
		429	# ifdef __cplusplus
		430	}
		431	# endif
		432	#endif
		433
345		434
346	/**/	435	/**/
347		436
348	#if EV_VERIFY >= 3	437	#if EV_VERIFY >= 3
349	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	438	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
…		…
384	# define inline_speed static noinline	473	# define inline_speed static noinline
385	#else	474	#else
386	# define inline_speed static inline	475	# define inline_speed static inline
387	#endif	476	#endif
388		477
389	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	478	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		479
		480	#if EV_MINPRI == EV_MAXPRI
		481	# define ABSPRI(w) (((W)w), 0)
		482	#else
390	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	483	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		484	#endif
391		485
392	#define EMPTY /* required for microsofts broken pseudo-c compiler */	486	#define EMPTY /* required for microsofts broken pseudo-c compiler */
393	#define EMPTY2(a,b) /* used to suppress some warnings */	487	#define EMPTY2(a,b) /* used to suppress some warnings */
394		488
395	typedef ev_watcher *W;	489	typedef ev_watcher *W;
…		…
407		501
408	#if EV_USE_MONOTONIC	502	#if EV_USE_MONOTONIC
409	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	503	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410	#endif	504	#endif
411		505
		506	#ifndef EV_FD_TO_WIN32_HANDLE
		507	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		508	#endif
		509	#ifndef EV_WIN32_HANDLE_TO_FD
		510	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (fd, 0)
		511	#endif
		512	#ifndef EV_WIN32_CLOSE_FD
		513	# define EV_WIN32_CLOSE_FD(fd) close (fd)
		514	#endif
		515
412	#ifdef _WIN32	516	#ifdef _WIN32
413	# include "ev_win32.c"	517	# include "ev_win32.c"
414	#endif	518	#endif
415		519
416	/*****************************************************************************/	520	/*****************************************************************************/
…		…
478	#define ev_malloc(size) ev_realloc (0, (size))	582	#define ev_malloc(size) ev_realloc (0, (size))
479	#define ev_free(ptr) ev_realloc ((ptr), 0)	583	#define ev_free(ptr) ev_realloc ((ptr), 0)
480		584
481	/*****************************************************************************/	585	/*****************************************************************************/
482		586
		587	/* set in reify when reification needed */
		588	#define EV_ANFD_REIFY 1
		589
		590	/* file descriptor info structure */
483	typedef struct	591	typedef struct
484	{	592	{
485	WL head;	593	WL head;
486	unsigned char events;	594	unsigned char events; /* the events watched for */
487	unsigned char reify;	595	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 */	596	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489	unsigned char unused;	597	unsigned char unused;
490	#if EV_USE_EPOLL	598	#if EV_USE_EPOLL
491	unsigned int egen; /* generation counter to counter epoll bugs */	599	unsigned int egen; /* generation counter to counter epoll bugs */
492	#endif	600	#endif
493	#if EV_SELECT_IS_WINSOCKET	601	#if EV_SELECT_IS_WINSOCKET
494	SOCKET handle;	602	SOCKET handle;
495	#endif	603	#endif
496	} ANFD;	604	} ANFD;
497		605
		606	/* stores the pending event set for a given watcher */
498	typedef struct	607	typedef struct
499	{	608	{
500	W w;	609	W w;
501	int events;	610	int events; /* the pending event set for the given watcher */
502	} ANPENDING;	611	} ANPENDING;
503		612
504	#if EV_USE_INOTIFY	613	#if EV_USE_INOTIFY
505	/* hash table entry per inotify-id */	614	/* hash table entry per inotify-id */
506	typedef struct	615	typedef struct
…		…
509	} ANFS;	618	} ANFS;
510	#endif	619	#endif
511		620
512	/* Heap Entry */	621	/* Heap Entry */
513	#if EV_HEAP_CACHE_AT	622	#if EV_HEAP_CACHE_AT
		623	/* a heap element */
514	typedef struct {	624	typedef struct {
515	ev_tstamp at;	625	ev_tstamp at;
516	WT w;	626	WT w;
517	} ANHE;	627	} ANHE;
518		628
519	#define ANHE_w(he) (he).w /* access watcher, read-write */	629	#define ANHE_w(he) (he).w /* access watcher, read-write */
520	#define ANHE_at(he) (he).at /* access cached at, read-only */	630	#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 */	631	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522	#else	632	#else
		633	/* a heap element */
523	typedef WT ANHE;	634	typedef WT ANHE;
524		635
525	#define ANHE_w(he) (he)	636	#define ANHE_w(he) (he)
526	#define ANHE_at(he) (he)->at	637	#define ANHE_at(he) (he)->at
527	#define ANHE_at_cache(he)	638	#define ANHE_at_cache(he)
…		…
551		662
552	static int ev_default_loop_ptr;	663	static int ev_default_loop_ptr;
553		664
554	#endif	665	#endif
555		666
		667	#if EV_MINIMAL < 2
		668	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		669	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		670	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		671	#else
		672	# define EV_RELEASE_CB (void)0
		673	# define EV_ACQUIRE_CB (void)0
		674	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		675	#endif
		676
		677	#define EVUNLOOP_RECURSE 0x80
		678
556	/*****************************************************************************/	679	/*****************************************************************************/
557		680
		681	#ifndef EV_HAVE_EV_TIME
558	ev_tstamp	682	ev_tstamp
559	ev_time (void)	683	ev_time (void)
560	{	684	{
561	#if EV_USE_REALTIME	685	#if EV_USE_REALTIME
562	if (expect_true (have_realtime))	686	if (expect_true (have_realtime))
…		…
569		693
570	struct timeval tv;	694	struct timeval tv;
571	gettimeofday (&tv, 0);	695	gettimeofday (&tv, 0);
572	return tv.tv_sec + tv.tv_usec * 1e-6;	696	return tv.tv_sec + tv.tv_usec * 1e-6;
573	}	697	}
		698	#endif
574		699
575	ev_tstamp inline_size	700	inline_size ev_tstamp
576	get_clock (void)	701	get_clock (void)
577	{	702	{
578	#if EV_USE_MONOTONIC	703	#if EV_USE_MONOTONIC
579	if (expect_true (have_monotonic))	704	if (expect_true (have_monotonic))
580	{	705	{
…		…
614		739
615	tv.tv_sec = (time_t)delay;	740	tv.tv_sec = (time_t)delay;
616	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	741	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617		742
618	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	743	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619	/* somehting nto guaranteed by newer posix versions, but guaranteed */	744	/* something not guaranteed by newer posix versions, but guaranteed */
620	/* by older ones */	745	/* by older ones */
621	select (0, 0, 0, 0, &tv);	746	select (0, 0, 0, 0, &tv);
622	#endif	747	#endif
623	}	748	}
624	}	749	}
625		750
626	/*****************************************************************************/	751	/*****************************************************************************/
627		752
628	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */	753	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
629		754
630	int inline_size	755	/* find a suitable new size for the given array, */
		756	/* hopefully by rounding to a ncie-to-malloc size */
		757	inline_size int
631	array_nextsize (int elem, int cur, int cnt)	758	array_nextsize (int elem, int cur, int cnt)
632	{	759	{
633	int ncur = cur + 1;	760	int ncur = cur + 1;
634		761
635	do	762	do
…		…
680	#define array_free(stem, idx) \	807	#define array_free(stem, idx) \
681	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0	808	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
682		809
683	/*****************************************************************************/	810	/*****************************************************************************/
684		811
		812	/* dummy callback for pending events */
		813	static void noinline
		814	pendingcb (EV_P_ ev_prepare *w, int revents)
		815	{
		816	}
		817
685	void noinline	818	void noinline
686	ev_feed_event (EV_P_ void *w, int revents)	819	ev_feed_event (EV_P_ void *w, int revents)
687	{	820	{
688	W w_ = (W)w;	821	W w_ = (W)w;
689	int pri = ABSPRI (w_);	822	int pri = ABSPRI (w_);
…		…
697	pendings [pri][w_->pending - 1].w = w_;	830	pendings [pri][w_->pending - 1].w = w_;
698	pendings [pri][w_->pending - 1].events = revents;	831	pendings [pri][w_->pending - 1].events = revents;
699	}	832	}
700	}	833	}
701		834
702	void inline_speed	835	inline_speed void
		836	feed_reverse (EV_P_ W w)
		837	{
		838	array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
		839	rfeeds [rfeedcnt++] = w;
		840	}
		841
		842	inline_size void
		843	feed_reverse_done (EV_P_ int revents)
		844	{
		845	do
		846	ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
		847	while (rfeedcnt);
		848	}
		849
		850	inline_speed void
703	queue_events (EV_P_ W *events, int eventcnt, int type)	851	queue_events (EV_P_ W *events, int eventcnt, int type)
704	{	852	{
705	int i;	853	int i;
706		854
707	for (i = 0; i < eventcnt; ++i)	855	for (i = 0; i < eventcnt; ++i)
708	ev_feed_event (EV_A_ events [i], type);	856	ev_feed_event (EV_A_ events [i], type);
709	}	857	}
710		858
711	/*****************************************************************************/	859	/*****************************************************************************/
712		860
713	void inline_speed	861	inline_speed void
714	fd_event (EV_P_ int fd, int revents)	862	fd_event_nc (EV_P_ int fd, int revents)
715	{	863	{
716	ANFD *anfd = anfds + fd;	864	ANFD *anfd = anfds + fd;
717	ev_io *w;	865	ev_io *w;
718		866
719	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	867	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
723	if (ev)	871	if (ev)
724	ev_feed_event (EV_A_ (W)w, ev);	872	ev_feed_event (EV_A_ (W)w, ev);
725	}	873	}
726	}	874	}
727		875
		876	/* do not submit kernel events for fds that have reify set */
		877	/* because that means they changed while we were polling for new events */
		878	inline_speed void
		879	fd_event (EV_P_ int fd, int revents)
		880	{
		881	ANFD *anfd = anfds + fd;
		882
		883	if (expect_true (!anfd->reify))
		884	fd_event_nc (EV_A_ fd, revents);
		885	}
		886
728	void	887	void
729	ev_feed_fd_event (EV_P_ int fd, int revents)	888	ev_feed_fd_event (EV_P_ int fd, int revents)
730	{	889	{
731	if (fd >= 0 && fd < anfdmax)	890	if (fd >= 0 && fd < anfdmax)
732	fd_event (EV_A_ fd, revents);	891	fd_event_nc (EV_A_ fd, revents);
733	}	892	}
734		893
735	void inline_size	894	/* make sure the external fd watch events are in-sync */
		895	/* with the kernel/libev internal state */
		896	inline_size void
736	fd_reify (EV_P)	897	fd_reify (EV_P)
737	{	898	{
738	int i;	899	int i;
739		900
740	for (i = 0; i < fdchangecnt; ++i)	901	for (i = 0; i < fdchangecnt; ++i)
…		…
750		911
751	#if EV_SELECT_IS_WINSOCKET	912	#if EV_SELECT_IS_WINSOCKET
752	if (events)	913	if (events)
753	{	914	{
754	unsigned long arg;	915	unsigned long arg;
755	#ifdef EV_FD_TO_WIN32_HANDLE
756	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	916	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
757	#else
758	anfd->handle = _get_osfhandle (fd);
759	#endif
760	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	917	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
761	}	918	}
762	#endif	919	#endif
763		920
764	{	921	{
…		…
774	}	931	}
775		932
776	fdchangecnt = 0;	933	fdchangecnt = 0;
777	}	934	}
778		935
779	void inline_size	936	/* something about the given fd changed */
		937	inline_size void
780	fd_change (EV_P_ int fd, int flags)	938	fd_change (EV_P_ int fd, int flags)
781	{	939	{
782	unsigned char reify = anfds [fd].reify;	940	unsigned char reify = anfds [fd].reify;
783	anfds [fd].reify |= flags;	941	anfds [fd].reify |= flags;
784		942
…		…
788	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	946	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
789	fdchanges [fdchangecnt - 1] = fd;	947	fdchanges [fdchangecnt - 1] = fd;
790	}	948	}
791	}	949	}
792		950
793	void inline_speed	951	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
		952	inline_speed void
794	fd_kill (EV_P_ int fd)	953	fd_kill (EV_P_ int fd)
795	{	954	{
796	ev_io *w;	955	ev_io *w;
797		956
798	while ((w = (ev_io *)anfds [fd].head))	957	while ((w = (ev_io *)anfds [fd].head))
…		…
800	ev_io_stop (EV_A_ w);	959	ev_io_stop (EV_A_ w);
801	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	960	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
802	}	961	}
803	}	962	}
804		963
805	int inline_size	964	/* check whether the given fd is atcually valid, for error recovery */
		965	inline_size int
806	fd_valid (int fd)	966	fd_valid (int fd)
807	{	967	{
808	#ifdef _WIN32	968	#ifdef _WIN32
809	return _get_osfhandle (fd) != -1;	969	return _get_osfhandle (fd) != -1;
810	#else	970	#else
…		…
832		992
833	for (fd = anfdmax; fd--; )	993	for (fd = anfdmax; fd--; )
834	if (anfds [fd].events)	994	if (anfds [fd].events)
835	{	995	{
836	fd_kill (EV_A_ fd);	996	fd_kill (EV_A_ fd);
837	return;	997	break;
838	}	998	}
839	}	999	}
840		1000
841	/* usually called after fork if backend needs to re-arm all fds from scratch */	1001	/* usually called after fork if backend needs to re-arm all fds from scratch */
842	static void noinline	1002	static void noinline
…		…
847	for (fd = 0; fd < anfdmax; ++fd)	1007	for (fd = 0; fd < anfdmax; ++fd)
848	if (anfds [fd].events)	1008	if (anfds [fd].events)
849	{	1009	{
850	anfds [fd].events = 0;	1010	anfds [fd].events = 0;
851	anfds [fd].emask = 0;	1011	anfds [fd].emask = 0;
852	fd_change (EV_A_ fd, EV__IOFDSET | 1);	1012	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
853	}	1013	}
854	}	1014	}
855		1015
856	/*****************************************************************************/	1016	/*****************************************************************************/
857		1017
…		…
873	#define HEAP0 (DHEAP - 1) /* index of first element in heap */	1033	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
874	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)	1034	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
875	#define UPHEAP_DONE(p,k) ((p) == (k))	1035	#define UPHEAP_DONE(p,k) ((p) == (k))
876		1036
877	/* away from the root */	1037	/* away from the root */
878	void inline_speed	1038	inline_speed void
879	downheap (ANHE *heap, int N, int k)	1039	downheap (ANHE *heap, int N, int k)
880	{	1040	{
881	ANHE he = heap [k];	1041	ANHE he = heap [k];
882	ANHE *E = heap + N + HEAP0;	1042	ANHE *E = heap + N + HEAP0;
883		1043
…		…
923	#define HEAP0 1	1083	#define HEAP0 1
924	#define HPARENT(k) ((k) >> 1)	1084	#define HPARENT(k) ((k) >> 1)
925	#define UPHEAP_DONE(p,k) (!(p))	1085	#define UPHEAP_DONE(p,k) (!(p))
926		1086
927	/* away from the root */	1087	/* away from the root */
928	void inline_speed	1088	inline_speed void
929	downheap (ANHE *heap, int N, int k)	1089	downheap (ANHE *heap, int N, int k)
930	{	1090	{
931	ANHE he = heap [k];	1091	ANHE he = heap [k];
932		1092
933	for (;;)	1093	for (;;)
934	{	1094	{
935	int c = k << 1;	1095	int c = k << 1;
936		1096
937	if (c > N + HEAP0 - 1)	1097	if (c >= N + HEAP0)
938	break;	1098	break;
939		1099
940	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])	1100	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
941	? 1 : 0;	1101	? 1 : 0;
942		1102
…		…
953	ev_active (ANHE_w (he)) = k;	1113	ev_active (ANHE_w (he)) = k;
954	}	1114	}
955	#endif	1115	#endif
956		1116
957	/* towards the root */	1117	/* towards the root */
958	void inline_speed	1118	inline_speed void
959	upheap (ANHE *heap, int k)	1119	upheap (ANHE *heap, int k)
960	{	1120	{
961	ANHE he = heap [k];	1121	ANHE he = heap [k];
962		1122
963	for (;;)	1123	for (;;)
…		…
974		1134
975	heap [k] = he;	1135	heap [k] = he;
976	ev_active (ANHE_w (he)) = k;	1136	ev_active (ANHE_w (he)) = k;
977	}	1137	}
978		1138
979	void inline_size	1139	/* move an element suitably so it is in a correct place */
		1140	inline_size void
980	adjustheap (ANHE *heap, int N, int k)	1141	adjustheap (ANHE *heap, int N, int k)
981	{	1142	{
982	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1143	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
983	upheap (heap, k);	1144	upheap (heap, k);
984	else	1145	else
985	downheap (heap, N, k);	1146	downheap (heap, N, k);
986	}	1147	}
987		1148
988	/* rebuild the heap: this function is used only once and executed rarely */	1149	/* rebuild the heap: this function is used only once and executed rarely */
989	void inline_size	1150	inline_size void
990	reheap (ANHE *heap, int N)	1151	reheap (ANHE *heap, int N)
991	{	1152	{
992	int i;	1153	int i;
993		1154
994	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */	1155	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
…		…
997	upheap (heap, i + HEAP0);	1158	upheap (heap, i + HEAP0);
998	}	1159	}
999		1160
1000	/*****************************************************************************/	1161	/*****************************************************************************/
1001		1162
		1163	/* associate signal watchers to a signal signal */
1002	typedef struct	1164	typedef struct
1003	{	1165	{
		1166	EV_ATOMIC_T pending;
		1167	#if EV_MULTIPLICITY
		1168	EV_P;
		1169	#endif
1004	WL head;	1170	WL head;
1005	EV_ATOMIC_T gotsig;
1006	} ANSIG;	1171	} ANSIG;
1007		1172
1008	static ANSIG *signals;	1173	static ANSIG signals [EV_NSIG - 1];
1009	static int signalmax;
1010
1011	static EV_ATOMIC_T gotsig;
1012		1174
1013	/*****************************************************************************/	1175	/*****************************************************************************/
1014		1176
1015	void inline_speed	1177	/* used to prepare libev internal fd's */
		1178	/* this is not fork-safe */
		1179	inline_speed void
1016	fd_intern (int fd)	1180	fd_intern (int fd)
1017	{	1181	{
1018	#ifdef _WIN32	1182	#ifdef _WIN32
1019	unsigned long arg = 1;	1183	unsigned long arg = 1;
1020	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1184	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
1025	}	1189	}
1026		1190
1027	static void noinline	1191	static void noinline
1028	evpipe_init (EV_P)	1192	evpipe_init (EV_P)
1029	{	1193	{
1030	if (!ev_is_active (&pipeev))	1194	if (!ev_is_active (&pipe_w))
1031	{	1195	{
1032	#if EV_USE_EVENTFD	1196	#if EV_USE_EVENTFD
		1197	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1198	if (evfd < 0 && errno == EINVAL)
1033	if ((evfd = eventfd (0, 0)) >= 0)	1199	evfd = eventfd (0, 0);
		1200
		1201	if (evfd >= 0)
1034	{	1202	{
1035	evpipe [0] = -1;	1203	evpipe [0] = -1;
1036	fd_intern (evfd);	1204	fd_intern (evfd); /* doing it twice doesn't hurt */
1037	ev_io_set (&pipeev, evfd, EV_READ);	1205	ev_io_set (&pipe_w, evfd, EV_READ);
1038	}	1206	}
1039	else	1207	else
1040	#endif	1208	#endif
1041	{	1209	{
1042	while (pipe (evpipe))	1210	while (pipe (evpipe))
1043	ev_syserr ("(libev) error creating signal/async pipe");	1211	ev_syserr ("(libev) error creating signal/async pipe");
1044		1212
1045	fd_intern (evpipe [0]);	1213	fd_intern (evpipe [0]);
1046	fd_intern (evpipe [1]);	1214	fd_intern (evpipe [1]);
1047	ev_io_set (&pipeev, evpipe [0], EV_READ);	1215	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1048	}	1216	}
1049		1217
1050	ev_io_start (EV_A_ &pipeev);	1218	ev_io_start (EV_A_ &pipe_w);
1051	ev_unref (EV_A); /* watcher should not keep loop alive */	1219	ev_unref (EV_A); /* watcher should not keep loop alive */
1052	}	1220	}
1053	}	1221	}
1054		1222
1055	void inline_size	1223	inline_size void
1056	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1224	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1057	{	1225	{
1058	if (!*flag)	1226	if (!*flag)
1059	{	1227	{
1060	int old_errno = errno; /* save errno because write might clobber it */	1228	int old_errno = errno; /* save errno because write might clobber it */
…		…
1073		1241
1074	errno = old_errno;	1242	errno = old_errno;
1075	}	1243	}
1076	}	1244	}
1077		1245
		1246	/* called whenever the libev signal pipe */
		1247	/* got some events (signal, async) */
1078	static void	1248	static void
1079	pipecb (EV_P_ ev_io *iow, int revents)	1249	pipecb (EV_P_ ev_io *iow, int revents)
1080	{	1250	{
		1251	int i;
		1252
1081	#if EV_USE_EVENTFD	1253	#if EV_USE_EVENTFD
1082	if (evfd >= 0)	1254	if (evfd >= 0)
1083	{	1255	{
1084	uint64_t counter;	1256	uint64_t counter;
1085	read (evfd, &counter, sizeof (uint64_t));	1257	read (evfd, &counter, sizeof (uint64_t));
…		…
1089	{	1261	{
1090	char dummy;	1262	char dummy;
1091	read (evpipe [0], &dummy, 1);	1263	read (evpipe [0], &dummy, 1);
1092	}	1264	}
1093		1265
1094	if (gotsig && ev_is_default_loop (EV_A))	1266	if (sig_pending)
1095	{	1267	{
1096	int signum;	1268	sig_pending = 0;
1097	gotsig = 0;
1098		1269
1099	for (signum = signalmax; signum--; )	1270	for (i = EV_NSIG - 1; i--; )
1100	if (signals [signum].gotsig)	1271	if (expect_false (signals [i].pending))
1101	ev_feed_signal_event (EV_A_ signum + 1);	1272	ev_feed_signal_event (EV_A_ i + 1);
1102	}	1273	}
1103		1274
1104	#if EV_ASYNC_ENABLE	1275	#if EV_ASYNC_ENABLE
1105	if (gotasync)	1276	if (async_pending)
1106	{	1277	{
1107	int i;	1278	async_pending = 0;
1108	gotasync = 0;
1109		1279
1110	for (i = asynccnt; i--; )	1280	for (i = asynccnt; i--; )
1111	if (asyncs [i]->sent)	1281	if (asyncs [i]->sent)
1112	{	1282	{
1113	asyncs [i]->sent = 0;	1283	asyncs [i]->sent = 0;
…		…
1121		1291
1122	static void	1292	static void
1123	ev_sighandler (int signum)	1293	ev_sighandler (int signum)
1124	{	1294	{
1125	#if EV_MULTIPLICITY	1295	#if EV_MULTIPLICITY
1126	struct ev_loop *loop = &default_loop_struct;	1296	EV_P = signals [signum - 1].loop;
1127	#endif	1297	#endif
1128		1298
1129	#if _WIN32	1299	#if _WIN32
1130	signal (signum, ev_sighandler);	1300	signal (signum, ev_sighandler);
1131	#endif	1301	#endif
1132		1302
1133	signals [signum - 1].gotsig = 1;	1303	signals [signum - 1].pending = 1;
1134	evpipe_write (EV_A_ &gotsig);	1304	evpipe_write (EV_A_ &sig_pending);
1135	}	1305	}
1136		1306
1137	void noinline	1307	void noinline
1138	ev_feed_signal_event (EV_P_ int signum)	1308	ev_feed_signal_event (EV_P_ int signum)
1139	{	1309	{
1140	WL w;	1310	WL w;
1141		1311
		1312	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1313	return;
		1314
		1315	--signum;
		1316
1142	#if EV_MULTIPLICITY	1317	#if EV_MULTIPLICITY
1143	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1318	/* it is permissible to try to feed a signal to the wrong loop */
1144	#endif	1319	/* or, likely more useful, feeding a signal nobody is waiting for */
1145		1320
1146	--signum;	1321	if (expect_false (signals [signum].loop != EV_A))
1147
1148	if (signum < 0 || signum >= signalmax)
1149	return;	1322	return;
		1323	#endif
1150		1324
1151	signals [signum].gotsig = 0;	1325	signals [signum].pending = 0;
1152		1326
1153	for (w = signals [signum].head; w; w = w->next)	1327	for (w = signals [signum].head; w; w = w->next)
1154	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1328	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1155	}	1329	}
1156		1330
		1331	#if EV_USE_SIGNALFD
		1332	static void
		1333	sigfdcb (EV_P_ ev_io *iow, int revents)
		1334	{
		1335	struct signalfd_siginfo si[2], *sip; /* these structs are big */
		1336
		1337	for (;;)
		1338	{
		1339	ssize_t res = read (sigfd, si, sizeof (si));
		1340
		1341	/* not ISO-C, as res might be -1, but works with SuS */
		1342	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		1343	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1344
		1345	if (res < (ssize_t)sizeof (si))
		1346	break;
		1347	}
		1348	}
		1349	#endif
		1350
1157	/*****************************************************************************/	1351	/*****************************************************************************/
1158		1352
1159	static WL childs [EV_PID_HASHSIZE];	1353	static WL childs [EV_PID_HASHSIZE];
1160		1354
1161	#ifndef _WIN32	1355	#ifndef _WIN32
…		…
1164		1358
1165	#ifndef WIFCONTINUED	1359	#ifndef WIFCONTINUED
1166	# define WIFCONTINUED(status) 0	1360	# define WIFCONTINUED(status) 0
1167	#endif	1361	#endif
1168		1362
1169	void inline_speed	1363	/* handle a single child status event */
		1364	inline_speed void
1170	child_reap (EV_P_ int chain, int pid, int status)	1365	child_reap (EV_P_ int chain, int pid, int status)
1171	{	1366	{
1172	ev_child *w;	1367	ev_child *w;
1173	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1368	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1174		1369
…		…
1187		1382
1188	#ifndef WCONTINUED	1383	#ifndef WCONTINUED
1189	# define WCONTINUED 0	1384	# define WCONTINUED 0
1190	#endif	1385	#endif
1191		1386
		1387	/* called on sigchld etc., calls waitpid */
1192	static void	1388	static void
1193	childcb (EV_P_ ev_signal *sw, int revents)	1389	childcb (EV_P_ ev_signal *sw, int revents)
1194	{	1390	{
1195	int pid, status;	1391	int pid, status;
1196		1392
…		…
1303	ev_backend (EV_P)	1499	ev_backend (EV_P)
1304	{	1500	{
1305	return backend;	1501	return backend;
1306	}	1502	}
1307		1503
		1504	#if EV_MINIMAL < 2
1308	unsigned int	1505	unsigned int
1309	ev_loop_count (EV_P)	1506	ev_loop_count (EV_P)
1310	{	1507	{
1311	return loop_count;	1508	return loop_count;
1312	}	1509	}
1313		1510
		1511	unsigned int
		1512	ev_loop_depth (EV_P)
		1513	{
		1514	return loop_depth;
		1515	}
		1516
1314	void	1517	void
1315	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1518	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1316	{	1519	{
1317	io_blocktime = interval;	1520	io_blocktime = interval;
1318	}	1521	}
…		…
1321	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1524	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1322	{	1525	{
1323	timeout_blocktime = interval;	1526	timeout_blocktime = interval;
1324	}	1527	}
1325		1528
		1529	void
		1530	ev_set_userdata (EV_P_ void *data)
		1531	{
		1532	userdata = data;
		1533	}
		1534
		1535	void *
		1536	ev_userdata (EV_P)
		1537	{
		1538	return userdata;
		1539	}
		1540
		1541	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1542	{
		1543	invoke_cb = invoke_pending_cb;
		1544	}
		1545
		1546	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1547	{
		1548	release_cb = release;
		1549	acquire_cb = acquire;
		1550	}
		1551	#endif
		1552
		1553	/* initialise a loop structure, must be zero-initialised */
1326	static void noinline	1554	static void noinline
1327	loop_init (EV_P_ unsigned int flags)	1555	loop_init (EV_P_ unsigned int flags)
1328	{	1556	{
1329	if (!backend)	1557	if (!backend)
1330	{	1558	{
…		…
1346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1574	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1347	have_monotonic = 1;	1575	have_monotonic = 1;
1348	}	1576	}
1349	#endif	1577	#endif
1350		1578
		1579	/* pid check not overridable via env */
		1580	#ifndef _WIN32
		1581	if (flags & EVFLAG_FORKCHECK)
		1582	curpid = getpid ();
		1583	#endif
		1584
		1585	if (!(flags & EVFLAG_NOENV)
		1586	&& !enable_secure ()
		1587	&& getenv ("LIBEV_FLAGS"))
		1588	flags = atoi (getenv ("LIBEV_FLAGS"));
		1589
1351	ev_rt_now = ev_time ();	1590	ev_rt_now = ev_time ();
1352	mn_now = get_clock ();	1591	mn_now = get_clock ();
1353	now_floor = mn_now;	1592	now_floor = mn_now;
1354	rtmn_diff = ev_rt_now - mn_now;	1593	rtmn_diff = ev_rt_now - mn_now;
		1594	#if EV_MINIMAL < 2
		1595	invoke_cb = ev_invoke_pending;
		1596	#endif
1355		1597
1356	io_blocktime = 0.;	1598	io_blocktime = 0.;
1357	timeout_blocktime = 0.;	1599	timeout_blocktime = 0.;
1358	backend = 0;	1600	backend = 0;
1359	backend_fd = -1;	1601	backend_fd = -1;
1360	gotasync = 0;	1602	sig_pending = 0;
		1603	#if EV_ASYNC_ENABLE
		1604	async_pending = 0;
		1605	#endif
1361	#if EV_USE_INOTIFY	1606	#if EV_USE_INOTIFY
1362	fs_fd = -2;	1607	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1363	#endif	1608	#endif
1364		1609	#if EV_USE_SIGNALFD
1365	/* pid check not overridable via env */	1610	sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2;
1366	#ifndef _WIN32
1367	if (flags & EVFLAG_FORKCHECK)
1368	curpid = getpid ();
1369	#endif	1611	#endif
1370
1371	if (!(flags & EVFLAG_NOENV)
1372	&& !enable_secure ()
1373	&& getenv ("LIBEV_FLAGS"))
1374	flags = atoi (getenv ("LIBEV_FLAGS"));
1375		1612
1376	if (!(flags & 0x0000ffffU))	1613	if (!(flags & 0x0000ffffU))
1377	flags |= ev_recommended_backends ();	1614	flags |= ev_recommended_backends ();
1378		1615
1379	#if EV_USE_PORT	1616	#if EV_USE_PORT
…		…
1390	#endif	1627	#endif
1391	#if EV_USE_SELECT	1628	#if EV_USE_SELECT
1392	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1629	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1393	#endif	1630	#endif
1394		1631
		1632	ev_prepare_init (&pending_w, pendingcb);
		1633
1395	ev_init (&pipeev, pipecb);	1634	ev_init (&pipe_w, pipecb);
1396	ev_set_priority (&pipeev, EV_MAXPRI);	1635	ev_set_priority (&pipe_w, EV_MAXPRI);
1397	}	1636	}
1398	}	1637	}
1399		1638
		1639	/* free up a loop structure */
1400	static void noinline	1640	static void noinline
1401	loop_destroy (EV_P)	1641	loop_destroy (EV_P)
1402	{	1642	{
1403	int i;	1643	int i;
1404		1644
1405	if (ev_is_active (&pipeev))	1645	if (ev_is_active (&pipe_w))
1406	{	1646	{
1407	ev_ref (EV_A); /* signal watcher */	1647	/*ev_ref (EV_A);*/
1408	ev_io_stop (EV_A_ &pipeev);	1648	/*ev_io_stop (EV_A_ &pipe_w);*/
1409		1649
1410	#if EV_USE_EVENTFD	1650	#if EV_USE_EVENTFD
1411	if (evfd >= 0)	1651	if (evfd >= 0)
1412	close (evfd);	1652	close (evfd);
1413	#endif	1653	#endif
1414		1654
1415	if (evpipe [0] >= 0)	1655	if (evpipe [0] >= 0)
1416	{	1656	{
1417	close (evpipe [0]);	1657	EV_WIN32_CLOSE_FD (evpipe [0]);
1418	close (evpipe [1]);	1658	EV_WIN32_CLOSE_FD (evpipe [1]);
1419	}	1659	}
1420	}	1660	}
		1661
		1662	#if EV_USE_SIGNALFD
		1663	if (ev_is_active (&sigfd_w))
		1664	{
		1665	/*ev_ref (EV_A);*/
		1666	/*ev_io_stop (EV_A_ &sigfd_w);*/
		1667
		1668	close (sigfd);
		1669	}
		1670	#endif
1421		1671
1422	#if EV_USE_INOTIFY	1672	#if EV_USE_INOTIFY
1423	if (fs_fd >= 0)	1673	if (fs_fd >= 0)
1424	close (fs_fd);	1674	close (fs_fd);
1425	#endif	1675	#endif
…		…
1449	#if EV_IDLE_ENABLE	1699	#if EV_IDLE_ENABLE
1450	array_free (idle, [i]);	1700	array_free (idle, [i]);
1451	#endif	1701	#endif
1452	}	1702	}
1453		1703
1454	ev_free (anfds); anfdmax = 0;	1704	ev_free (anfds); anfds = 0; anfdmax = 0;
1455		1705
1456	/* have to use the microsoft-never-gets-it-right macro */	1706	/* have to use the microsoft-never-gets-it-right macro */
		1707	array_free (rfeed, EMPTY);
1457	array_free (fdchange, EMPTY);	1708	array_free (fdchange, EMPTY);
1458	array_free (timer, EMPTY);	1709	array_free (timer, EMPTY);
1459	#if EV_PERIODIC_ENABLE	1710	#if EV_PERIODIC_ENABLE
1460	array_free (periodic, EMPTY);	1711	array_free (periodic, EMPTY);
1461	#endif	1712	#endif
…		…
1470		1721
1471	backend = 0;	1722	backend = 0;
1472	}	1723	}
1473		1724
1474	#if EV_USE_INOTIFY	1725	#if EV_USE_INOTIFY
1475	void inline_size infy_fork (EV_P);	1726	inline_size void infy_fork (EV_P);
1476	#endif	1727	#endif
1477		1728
1478	void inline_size	1729	inline_size void
1479	loop_fork (EV_P)	1730	loop_fork (EV_P)
1480	{	1731	{
1481	#if EV_USE_PORT	1732	#if EV_USE_PORT
1482	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1733	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1483	#endif	1734	#endif
…		…
1489	#endif	1740	#endif
1490	#if EV_USE_INOTIFY	1741	#if EV_USE_INOTIFY
1491	infy_fork (EV_A);	1742	infy_fork (EV_A);
1492	#endif	1743	#endif
1493		1744
1494	if (ev_is_active (&pipeev))	1745	if (ev_is_active (&pipe_w))
1495	{	1746	{
1496	/* this "locks" the handlers against writing to the pipe */	1747	/* this "locks" the handlers against writing to the pipe */
1497	/* while we modify the fd vars */	1748	/* while we modify the fd vars */
1498	gotsig = 1;	1749	sig_pending = 1;
1499	#if EV_ASYNC_ENABLE	1750	#if EV_ASYNC_ENABLE
1500	gotasync = 1;	1751	async_pending = 1;
1501	#endif	1752	#endif
1502		1753
1503	ev_ref (EV_A);	1754	ev_ref (EV_A);
1504	ev_io_stop (EV_A_ &pipeev);	1755	ev_io_stop (EV_A_ &pipe_w);
1505		1756
1506	#if EV_USE_EVENTFD	1757	#if EV_USE_EVENTFD
1507	if (evfd >= 0)	1758	if (evfd >= 0)
1508	close (evfd);	1759	close (evfd);
1509	#endif	1760	#endif
1510		1761
1511	if (evpipe [0] >= 0)	1762	if (evpipe [0] >= 0)
1512	{	1763	{
1513	close (evpipe [0]);	1764	EV_WIN32_CLOSE_FD (evpipe [0]);
1514	close (evpipe [1]);	1765	EV_WIN32_CLOSE_FD (evpipe [1]);
1515	}	1766	}
1516		1767
1517	evpipe_init (EV_A);	1768	evpipe_init (EV_A);
1518	/* now iterate over everything, in case we missed something */	1769	/* now iterate over everything, in case we missed something */
1519	pipecb (EV_A_ &pipeev, EV_READ);	1770	pipecb (EV_A_ &pipe_w, EV_READ);
1520	}	1771	}
1521		1772
1522	postfork = 0;	1773	postfork = 0;
1523	}	1774	}
1524		1775
1525	#if EV_MULTIPLICITY	1776	#if EV_MULTIPLICITY
1526		1777
1527	struct ev_loop *	1778	struct ev_loop *
1528	ev_loop_new (unsigned int flags)	1779	ev_loop_new (unsigned int flags)
1529	{	1780	{
1530	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1781	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1531		1782
1532	memset (loop, 0, sizeof (struct ev_loop));	1783	memset (EV_A, 0, sizeof (struct ev_loop));
1533
1534	loop_init (EV_A_ flags);	1784	loop_init (EV_A_ flags);
1535		1785
1536	if (ev_backend (EV_A))	1786	if (ev_backend (EV_A))
1537	return loop;	1787	return EV_A;
1538		1788
1539	return 0;	1789	return 0;
1540	}	1790	}
1541		1791
1542	void	1792	void
…		…
1549	void	1799	void
1550	ev_loop_fork (EV_P)	1800	ev_loop_fork (EV_P)
1551	{	1801	{
1552	postfork = 1; /* must be in line with ev_default_fork */	1802	postfork = 1; /* must be in line with ev_default_fork */
1553	}	1803	}
		1804	#endif /* multiplicity */
1554		1805
1555	#if EV_VERIFY	1806	#if EV_VERIFY
1556	static void noinline	1807	static void noinline
1557	verify_watcher (EV_P_ W w)	1808	verify_watcher (EV_P_ W w)
1558	{	1809	{
…		…
1586	verify_watcher (EV_A_ ws [cnt]);	1837	verify_watcher (EV_A_ ws [cnt]);
1587	}	1838	}
1588	}	1839	}
1589	#endif	1840	#endif
1590		1841
		1842	#if EV_MINIMAL < 2
1591	void	1843	void
1592	ev_loop_verify (EV_P)	1844	ev_loop_verify (EV_P)
1593	{	1845	{
1594	#if EV_VERIFY	1846	#if EV_VERIFY
1595	int i;	1847	int i;
…		…
1644	assert (checkmax >= checkcnt);	1896	assert (checkmax >= checkcnt);
1645	array_verify (EV_A_ (W *)checks, checkcnt);	1897	array_verify (EV_A_ (W *)checks, checkcnt);
1646		1898
1647	# if 0	1899	# if 0
1648	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1900	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)	1901	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1650	# endif
1651	#endif	1902	# endif
		1903	#endif
1652	}	1904	}
1653		1905	#endif
1654	#endif /* multiplicity */
1655		1906
1656	#if EV_MULTIPLICITY	1907	#if EV_MULTIPLICITY
1657	struct ev_loop *	1908	struct ev_loop *
1658	ev_default_loop_init (unsigned int flags)	1909	ev_default_loop_init (unsigned int flags)
1659	#else	1910	#else
…		…
1662	#endif	1913	#endif
1663	{	1914	{
1664	if (!ev_default_loop_ptr)	1915	if (!ev_default_loop_ptr)
1665	{	1916	{
1666	#if EV_MULTIPLICITY	1917	#if EV_MULTIPLICITY
1667	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1918	EV_P = ev_default_loop_ptr = &default_loop_struct;
1668	#else	1919	#else
1669	ev_default_loop_ptr = 1;	1920	ev_default_loop_ptr = 1;
1670	#endif	1921	#endif
1671		1922
1672	loop_init (EV_A_ flags);	1923	loop_init (EV_A_ flags);
…		…
1689		1940
1690	void	1941	void
1691	ev_default_destroy (void)	1942	ev_default_destroy (void)
1692	{	1943	{
1693	#if EV_MULTIPLICITY	1944	#if EV_MULTIPLICITY
1694	struct ev_loop *loop = ev_default_loop_ptr;	1945	EV_P = ev_default_loop_ptr;
1695	#endif	1946	#endif
1696		1947
1697	ev_default_loop_ptr = 0;	1948	ev_default_loop_ptr = 0;
1698		1949
1699	#ifndef _WIN32	1950	#ifndef _WIN32
…		…
1706		1957
1707	void	1958	void
1708	ev_default_fork (void)	1959	ev_default_fork (void)
1709	{	1960	{
1710	#if EV_MULTIPLICITY	1961	#if EV_MULTIPLICITY
1711	struct ev_loop *loop = ev_default_loop_ptr;	1962	EV_P = ev_default_loop_ptr;
1712	#endif	1963	#endif
1713		1964
1714	postfork = 1; /* must be in line with ev_loop_fork */	1965	postfork = 1; /* must be in line with ev_loop_fork */
1715	}	1966	}
1716		1967
…		…
1720	ev_invoke (EV_P_ void *w, int revents)	1971	ev_invoke (EV_P_ void *w, int revents)
1721	{	1972	{
1722	EV_CB_INVOKE ((W)w, revents);	1973	EV_CB_INVOKE ((W)w, revents);
1723	}	1974	}
1724		1975
1725	void inline_speed	1976	unsigned int
1726	call_pending (EV_P)	1977	ev_pending_count (EV_P)
		1978	{
		1979	int pri;
		1980	unsigned int count = 0;
		1981
		1982	for (pri = NUMPRI; pri--; )
		1983	count += pendingcnt [pri];
		1984
		1985	return count;
		1986	}
		1987
		1988	void noinline
		1989	ev_invoke_pending (EV_P)
1727	{	1990	{
1728	int pri;	1991	int pri;
1729		1992
1730	for (pri = NUMPRI; pri--; )	1993	for (pri = NUMPRI; pri--; )
1731	while (pendingcnt [pri])	1994	while (pendingcnt [pri])
1732	{	1995	{
1733	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1996	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1734		1997
1735	if (expect_true (p->w))
1736	{
1737	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/	1998	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1999	/* ^ this is no longer true, as pending_w could be here */
1738		2000
1739	p->w->pending = 0;	2001	p->w->pending = 0;
1740	EV_CB_INVOKE (p->w, p->events);	2002	EV_CB_INVOKE (p->w, p->events);
1741	EV_FREQUENT_CHECK;	2003	EV_FREQUENT_CHECK;
1742	}
1743	}	2004	}
1744	}	2005	}
1745		2006
1746	#if EV_IDLE_ENABLE	2007	#if EV_IDLE_ENABLE
1747	void inline_size	2008	/* make idle watchers pending. this handles the "call-idle */
		2009	/* only when higher priorities are idle" logic */
		2010	inline_size void
1748	idle_reify (EV_P)	2011	idle_reify (EV_P)
1749	{	2012	{
1750	if (expect_false (idleall))	2013	if (expect_false (idleall))
1751	{	2014	{
1752	int pri;	2015	int pri;
…		…
1764	}	2027	}
1765	}	2028	}
1766	}	2029	}
1767	#endif	2030	#endif
1768		2031
1769	void inline_size	2032	/* make timers pending */
		2033	inline_size void
1770	timers_reify (EV_P)	2034	timers_reify (EV_P)
1771	{	2035	{
1772	EV_FREQUENT_CHECK;	2036	EV_FREQUENT_CHECK;
1773		2037
1774	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)	2038	if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1775	{	2039	{
1776	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);	2040	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	{	2041	{
		2042	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		2043
		2044	/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
		2045
		2046	/* first reschedule or stop timer */
		2047	if (w->repeat)
		2048	{
1783	ev_at (w) += w->repeat;	2049	ev_at (w) += w->repeat;
1784	if (ev_at (w) < mn_now)	2050	if (ev_at (w) < mn_now)
1785	ev_at (w) = mn_now;	2051	ev_at (w) = mn_now;
1786		2052
1787	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));	2053	assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1788		2054
1789	ANHE_at_cache (timers [HEAP0]);	2055	ANHE_at_cache (timers [HEAP0]);
1790	downheap (timers, timercnt, HEAP0);	2056	downheap (timers, timercnt, HEAP0);
		2057	}
		2058	else
		2059	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		2060
		2061	EV_FREQUENT_CHECK;
		2062	feed_reverse (EV_A_ (W)w);
1791	}	2063	}
1792	else	2064	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1793	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1794		2065
1795	EV_FREQUENT_CHECK;
1796	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	2066	feed_reverse_done (EV_A_ EV_TIMEOUT);
1797	}	2067	}
1798	}	2068	}
1799		2069
1800	#if EV_PERIODIC_ENABLE	2070	#if EV_PERIODIC_ENABLE
1801	void inline_size	2071	/* make periodics pending */
		2072	inline_size void
1802	periodics_reify (EV_P)	2073	periodics_reify (EV_P)
1803	{	2074	{
1804	EV_FREQUENT_CHECK;	2075	EV_FREQUENT_CHECK;
1805		2076
1806	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)	2077	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1807	{	2078	{
1808	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);	2079	int feed_count = 0;
1809		2080
1810	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/	2081	do
1811
1812	/* first reschedule or stop timer */
1813	if (w->reschedule_cb)
1814	{	2082	{
		2083	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		2084
		2085	/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
		2086
		2087	/* first reschedule or stop timer */
		2088	if (w->reschedule_cb)
		2089	{
1815	ev_at (w) = w->reschedule_cb (w, ev_rt_now);	2090	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1816		2091
1817	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));	2092	assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1818		2093
1819	ANHE_at_cache (periodics [HEAP0]);	2094	ANHE_at_cache (periodics [HEAP0]);
1820	downheap (periodics, periodiccnt, HEAP0);	2095	downheap (periodics, periodiccnt, HEAP0);
		2096	}
		2097	else if (w->interval)
		2098	{
		2099	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2100	/* if next trigger time is not sufficiently in the future, put it there */
		2101	/* this might happen because of floating point inexactness */
		2102	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		2103	{
		2104	ev_at (w) += w->interval;
		2105
		2106	/* if interval is unreasonably low we might still have a time in the past */
		2107	/* so correct this. this will make the periodic very inexact, but the user */
		2108	/* has effectively asked to get triggered more often than possible */
		2109	if (ev_at (w) < ev_rt_now)
		2110	ev_at (w) = ev_rt_now;
		2111	}
		2112
		2113	ANHE_at_cache (periodics [HEAP0]);
		2114	downheap (periodics, periodiccnt, HEAP0);
		2115	}
		2116	else
		2117	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		2118
		2119	EV_FREQUENT_CHECK;
		2120	feed_reverse (EV_A_ (W)w);
1821	}	2121	}
1822	else if (w->interval)	2122	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		2123
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);	2124	feed_reverse_done (EV_A_ EV_PERIODIC);
1846	}	2125	}
1847	}	2126	}
1848		2127
		2128	/* simply recalculate all periodics */
		2129	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1849	static void noinline	2130	static void noinline
1850	periodics_reschedule (EV_P)	2131	periodics_reschedule (EV_P)
1851	{	2132	{
1852	int i;	2133	int i;
1853		2134
…		…
1866		2147
1867	reheap (periodics, periodiccnt);	2148	reheap (periodics, periodiccnt);
1868	}	2149	}
1869	#endif	2150	#endif
1870		2151
1871	void inline_speed	2152	/* adjust all timers by a given offset */
		2153	static void noinline
		2154	timers_reschedule (EV_P_ ev_tstamp adjust)
		2155	{
		2156	int i;
		2157
		2158	for (i = 0; i < timercnt; ++i)
		2159	{
		2160	ANHE *he = timers + i + HEAP0;
		2161	ANHE_w (*he)->at += adjust;
		2162	ANHE_at_cache (*he);
		2163	}
		2164	}
		2165
		2166	/* fetch new monotonic and realtime times from the kernel */
		2167	/* also detetc if there was a timejump, and act accordingly */
		2168	inline_speed void
1872	time_update (EV_P_ ev_tstamp max_block)	2169	time_update (EV_P_ ev_tstamp max_block)
1873	{	2170	{
1874	int i;
1875
1876	#if EV_USE_MONOTONIC	2171	#if EV_USE_MONOTONIC
1877	if (expect_true (have_monotonic))	2172	if (expect_true (have_monotonic))
1878	{	2173	{
		2174	int i;
1879	ev_tstamp odiff = rtmn_diff;	2175	ev_tstamp odiff = rtmn_diff;
1880		2176
1881	mn_now = get_clock ();	2177	mn_now = get_clock ();
1882		2178
1883	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	2179	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1909	ev_rt_now = ev_time ();	2205	ev_rt_now = ev_time ();
1910	mn_now = get_clock ();	2206	mn_now = get_clock ();
1911	now_floor = mn_now;	2207	now_floor = mn_now;
1912	}	2208	}
1913		2209
		2210	/* no timer adjustment, as the monotonic clock doesn't jump */
		2211	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1914	# if EV_PERIODIC_ENABLE	2212	# if EV_PERIODIC_ENABLE
1915	periodics_reschedule (EV_A);	2213	periodics_reschedule (EV_A);
1916	# endif	2214	# endif
1917	/* no timer adjustment, as the monotonic clock doesn't jump */
1918	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1919	}	2215	}
1920	else	2216	else
1921	#endif	2217	#endif
1922	{	2218	{
1923	ev_rt_now = ev_time ();	2219	ev_rt_now = ev_time ();
1924		2220
1925	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))	2221	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1926	{	2222	{
		2223	/* adjust timers. this is easy, as the offset is the same for all of them */
		2224	timers_reschedule (EV_A_ ev_rt_now - mn_now);
1927	#if EV_PERIODIC_ENABLE	2225	#if EV_PERIODIC_ENABLE
1928	periodics_reschedule (EV_A);	2226	periodics_reschedule (EV_A);
1929	#endif	2227	#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	}	2228	}
1938		2229
1939	mn_now = ev_rt_now;	2230	mn_now = ev_rt_now;
1940	}	2231	}
1941	}	2232	}
1942		2233
1943	void	2234	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)	2235	ev_loop (EV_P_ int flags)
1965	{	2236	{
		2237	#if EV_MINIMAL < 2
		2238	++loop_depth;
		2239	#endif
		2240
		2241	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
		2242
1966	loop_done = EVUNLOOP_CANCEL;	2243	loop_done = EVUNLOOP_CANCEL;
1967		2244
1968	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2245	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1969		2246
1970	do	2247	do
1971	{	2248	{
1972	#if EV_VERIFY >= 2	2249	#if EV_VERIFY >= 2
1973	ev_loop_verify (EV_A);	2250	ev_loop_verify (EV_A);
…		…
1986	/* we might have forked, so queue fork handlers */	2263	/* we might have forked, so queue fork handlers */
1987	if (expect_false (postfork))	2264	if (expect_false (postfork))
1988	if (forkcnt)	2265	if (forkcnt)
1989	{	2266	{
1990	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2267	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1991	call_pending (EV_A);	2268	EV_INVOKE_PENDING;
1992	}	2269	}
1993	#endif	2270	#endif
1994		2271
1995	/* queue prepare watchers (and execute them) */	2272	/* queue prepare watchers (and execute them) */
1996	if (expect_false (preparecnt))	2273	if (expect_false (preparecnt))
1997	{	2274	{
1998	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2275	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1999	call_pending (EV_A);	2276	EV_INVOKE_PENDING;
2000	}	2277	}
2001		2278
2002	if (expect_false (!activecnt))	2279	if (expect_false (loop_done))
2003	break;	2280	break;
2004		2281
2005	/* we might have forked, so reify kernel state if necessary */	2282	/* we might have forked, so reify kernel state if necessary */
2006	if (expect_false (postfork))	2283	if (expect_false (postfork))
2007	loop_fork (EV_A);	2284	loop_fork (EV_A);
…		…
2014	ev_tstamp waittime = 0.;	2291	ev_tstamp waittime = 0.;
2015	ev_tstamp sleeptime = 0.;	2292	ev_tstamp sleeptime = 0.;
2016		2293
2017	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2294	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2018	{	2295	{
		2296	/* remember old timestamp for io_blocktime calculation */
		2297	ev_tstamp prev_mn_now = mn_now;
		2298
2019	/* update time to cancel out callback processing overhead */	2299	/* update time to cancel out callback processing overhead */
2020	time_update (EV_A_ 1e100);	2300	time_update (EV_A_ 1e100);
2021		2301
2022	waittime = MAX_BLOCKTIME;	2302	waittime = MAX_BLOCKTIME;
2023		2303
…		…
2033	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2313	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2034	if (waittime > to) waittime = to;	2314	if (waittime > to) waittime = to;
2035	}	2315	}
2036	#endif	2316	#endif
2037		2317
		2318	/* don't let timeouts decrease the waittime below timeout_blocktime */
2038	if (expect_false (waittime < timeout_blocktime))	2319	if (expect_false (waittime < timeout_blocktime))
2039	waittime = timeout_blocktime;	2320	waittime = timeout_blocktime;
2040		2321
2041	sleeptime = waittime - backend_fudge;	2322	/* extra check because io_blocktime is commonly 0 */
2042
2043	if (expect_true (sleeptime > io_blocktime))	2323	if (expect_false (io_blocktime))
2044	sleeptime = io_blocktime;
2045
2046	if (sleeptime)
2047	{	2324	{
		2325	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2326
		2327	if (sleeptime > waittime - backend_fudge)
		2328	sleeptime = waittime - backend_fudge;
		2329
		2330	if (expect_true (sleeptime > 0.))
		2331	{
2048	ev_sleep (sleeptime);	2332	ev_sleep (sleeptime);
2049	waittime -= sleeptime;	2333	waittime -= sleeptime;
		2334	}
2050	}	2335	}
2051	}	2336	}
2052		2337
		2338	#if EV_MINIMAL < 2
2053	++loop_count;	2339	++loop_count;
		2340	#endif
		2341	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2054	backend_poll (EV_A_ waittime);	2342	backend_poll (EV_A_ waittime);
		2343	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2055		2344
2056	/* update ev_rt_now, do magic */	2345	/* update ev_rt_now, do magic */
2057	time_update (EV_A_ waittime + sleeptime);	2346	time_update (EV_A_ waittime + sleeptime);
2058	}	2347	}
2059		2348
…		…
2070		2359
2071	/* queue check watchers, to be executed first */	2360	/* queue check watchers, to be executed first */
2072	if (expect_false (checkcnt))	2361	if (expect_false (checkcnt))
2073	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2362	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2074		2363
2075	call_pending (EV_A);	2364	EV_INVOKE_PENDING;
2076	}	2365	}
2077	while (expect_true (	2366	while (expect_true (
2078	activecnt	2367	activecnt
2079	&& !loop_done	2368	&& !loop_done
2080	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2369	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2081	));	2370	));
2082		2371
2083	if (loop_done == EVUNLOOP_ONE)	2372	if (loop_done == EVUNLOOP_ONE)
2084	loop_done = EVUNLOOP_CANCEL;	2373	loop_done = EVUNLOOP_CANCEL;
		2374
		2375	#if EV_MINIMAL < 2
		2376	--loop_depth;
		2377	#endif
2085	}	2378	}
2086		2379
2087	void	2380	void
2088	ev_unloop (EV_P_ int how)	2381	ev_unloop (EV_P_ int how)
2089	{	2382	{
2090	loop_done = how;	2383	loop_done = how;
2091	}	2384	}
2092		2385
		2386	void
		2387	ev_ref (EV_P)
		2388	{
		2389	++activecnt;
		2390	}
		2391
		2392	void
		2393	ev_unref (EV_P)
		2394	{
		2395	--activecnt;
		2396	}
		2397
		2398	void
		2399	ev_now_update (EV_P)
		2400	{
		2401	time_update (EV_A_ 1e100);
		2402	}
		2403
		2404	void
		2405	ev_suspend (EV_P)
		2406	{
		2407	ev_now_update (EV_A);
		2408	}
		2409
		2410	void
		2411	ev_resume (EV_P)
		2412	{
		2413	ev_tstamp mn_prev = mn_now;
		2414
		2415	ev_now_update (EV_A);
		2416	timers_reschedule (EV_A_ mn_now - mn_prev);
		2417	#if EV_PERIODIC_ENABLE
		2418	/* TODO: really do this? */
		2419	periodics_reschedule (EV_A);
		2420	#endif
		2421	}
		2422
2093	/*****************************************************************************/	2423	/*****************************************************************************/
		2424	/* singly-linked list management, used when the expected list length is short */
2094		2425
2095	void inline_size	2426	inline_size void
2096	wlist_add (WL *head, WL elem)	2427	wlist_add (WL *head, WL elem)
2097	{	2428	{
2098	elem->next = *head;	2429	elem->next = *head;
2099	*head = elem;	2430	*head = elem;
2100	}	2431	}
2101		2432
2102	void inline_size	2433	inline_size void
2103	wlist_del (WL *head, WL elem)	2434	wlist_del (WL *head, WL elem)
2104	{	2435	{
2105	while (*head)	2436	while (*head)
2106	{	2437	{
2107	if (*head == elem)	2438	if (expect_true (*head == elem))
2108	{	2439	{
2109	*head = elem->next;	2440	*head = elem->next;
2110	return;	2441	break;
2111	}	2442	}
2112		2443
2113	head = &(*head)->next;	2444	head = &(*head)->next;
2114	}	2445	}
2115	}	2446	}
2116		2447
2117	void inline_speed	2448	/* internal, faster, version of ev_clear_pending */
		2449	inline_speed void
2118	clear_pending (EV_P_ W w)	2450	clear_pending (EV_P_ W w)
2119	{	2451	{
2120	if (w->pending)	2452	if (w->pending)
2121	{	2453	{
2122	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2454	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2123	w->pending = 0;	2455	w->pending = 0;
2124	}	2456	}
2125	}	2457	}
2126		2458
2127	int	2459	int
…		…
2131	int pending = w_->pending;	2463	int pending = w_->pending;
2132		2464
2133	if (expect_true (pending))	2465	if (expect_true (pending))
2134	{	2466	{
2135	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2467	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2468	p->w = (W)&pending_w;
2136	w_->pending = 0;	2469	w_->pending = 0;
2137	p->w = 0;
2138	return p->events;	2470	return p->events;
2139	}	2471	}
2140	else	2472	else
2141	return 0;	2473	return 0;
2142	}	2474	}
2143		2475
2144	void inline_size	2476	inline_size void
2145	pri_adjust (EV_P_ W w)	2477	pri_adjust (EV_P_ W w)
2146	{	2478	{
2147	int pri = w->priority;	2479	int pri = ev_priority (w);
2148	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2480	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2149	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2481	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2150	w->priority = pri;	2482	ev_set_priority (w, pri);
2151	}	2483	}
2152		2484
2153	void inline_speed	2485	inline_speed void
2154	ev_start (EV_P_ W w, int active)	2486	ev_start (EV_P_ W w, int active)
2155	{	2487	{
2156	pri_adjust (EV_A_ w);	2488	pri_adjust (EV_A_ w);
2157	w->active = active;	2489	w->active = active;
2158	ev_ref (EV_A);	2490	ev_ref (EV_A);
2159	}	2491	}
2160		2492
2161	void inline_size	2493	inline_size void
2162	ev_stop (EV_P_ W w)	2494	ev_stop (EV_P_ W w)
2163	{	2495	{
2164	ev_unref (EV_A);	2496	ev_unref (EV_A);
2165	w->active = 0;	2497	w->active = 0;
2166	}	2498	}
…		…
2182		2514
2183	ev_start (EV_A_ (W)w, 1);	2515	ev_start (EV_A_ (W)w, 1);
2184	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2516	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2185	wlist_add (&anfds[fd].head, (WL)w);	2517	wlist_add (&anfds[fd].head, (WL)w);
2186		2518
2187	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);	2519	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2188	w->events &= ~EV__IOFDSET;	2520	w->events &= ~EV__IOFDSET;
2189		2521
2190	EV_FREQUENT_CHECK;	2522	EV_FREQUENT_CHECK;
2191	}	2523	}
2192		2524
…		…
2286	}	2618	}
2287		2619
2288	EV_FREQUENT_CHECK;	2620	EV_FREQUENT_CHECK;
2289	}	2621	}
2290		2622
		2623	ev_tstamp
		2624	ev_timer_remaining (EV_P_ ev_timer *w)
		2625	{
		2626	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2627	}
		2628
2291	#if EV_PERIODIC_ENABLE	2629	#if EV_PERIODIC_ENABLE
2292	void noinline	2630	void noinline
2293	ev_periodic_start (EV_P_ ev_periodic *w)	2631	ev_periodic_start (EV_P_ ev_periodic *w)
2294	{	2632	{
2295	if (expect_false (ev_is_active (w)))	2633	if (expect_false (ev_is_active (w)))
…		…
2362	#endif	2700	#endif
2363		2701
2364	void noinline	2702	void noinline
2365	ev_signal_start (EV_P_ ev_signal *w)	2703	ev_signal_start (EV_P_ ev_signal *w)
2366	{	2704	{
2367	#if EV_MULTIPLICITY
2368	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2369	#endif
2370	if (expect_false (ev_is_active (w)))	2705	if (expect_false (ev_is_active (w)))
2371	return;	2706	return;
2372		2707
2373	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));	2708	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2374		2709
2375	evpipe_init (EV_A);	2710	#if EV_MULTIPLICITY
		2711	assert (("libev: a signal must not be attached to two different loops",
		2712	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2376		2713
2377	EV_FREQUENT_CHECK;	2714	signals [w->signum - 1].loop = EV_A;
		2715	#endif
2378		2716
		2717	EV_FREQUENT_CHECK;
		2718
		2719	#if EV_USE_SIGNALFD
		2720	if (sigfd == -2)
2379	{	2721	{
2380	#ifndef _WIN32	2722	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2381	sigset_t full, prev;	2723	if (sigfd < 0 && errno == EINVAL)
2382	sigfillset (&full);	2724	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2383	sigprocmask (SIG_SETMASK, &full, &prev);
2384	#endif
2385		2725
2386	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);	2726	if (sigfd >= 0)
		2727	{
		2728	fd_intern (sigfd); /* doing it twice will not hurt */
2387		2729
2388	#ifndef _WIN32	2730	sigemptyset (&sigfd_set);
2389	sigprocmask (SIG_SETMASK, &prev, 0);	2731
2390	#endif	2732	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2733	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2734	ev_io_start (EV_A_ &sigfd_w);
		2735	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2736	}
2391	}	2737	}
		2738
		2739	if (sigfd >= 0)
		2740	{
		2741	/* TODO: check .head */
		2742	sigaddset (&sigfd_set, w->signum);
		2743	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2744
		2745	signalfd (sigfd, &sigfd_set, 0);
		2746	}
		2747	#endif
2392		2748
2393	ev_start (EV_A_ (W)w, 1);	2749	ev_start (EV_A_ (W)w, 1);
2394	wlist_add (&signals [w->signum - 1].head, (WL)w);	2750	wlist_add (&signals [w->signum - 1].head, (WL)w);
2395		2751
2396	if (!((WL)w)->next)	2752	if (!((WL)w)->next)
		2753	# if EV_USE_SIGNALFD
		2754	if (sigfd < 0) /*TODO*/
		2755	# endif
2397	{	2756	{
2398	#if _WIN32	2757	# if _WIN32
2399	signal (w->signum, ev_sighandler);	2758	signal (w->signum, ev_sighandler);
2400	#else	2759	# else
2401	struct sigaction sa;	2760	struct sigaction sa;
		2761
		2762	evpipe_init (EV_A);
		2763
2402	sa.sa_handler = ev_sighandler;	2764	sa.sa_handler = ev_sighandler;
2403	sigfillset (&sa.sa_mask);	2765	sigfillset (&sa.sa_mask);
2404	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2766	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2405	sigaction (w->signum, &sa, 0);	2767	sigaction (w->signum, &sa, 0);
		2768
		2769	sigemptyset (&sa.sa_mask);
		2770	sigaddset (&sa.sa_mask, w->signum);
		2771	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2406	#endif	2772	#endif
2407	}	2773	}
2408		2774
2409	EV_FREQUENT_CHECK;	2775	EV_FREQUENT_CHECK;
2410	}	2776	}
2411		2777
2412	void noinline	2778	void noinline
…		…
2420		2786
2421	wlist_del (&signals [w->signum - 1].head, (WL)w);	2787	wlist_del (&signals [w->signum - 1].head, (WL)w);
2422	ev_stop (EV_A_ (W)w);	2788	ev_stop (EV_A_ (W)w);
2423		2789
2424	if (!signals [w->signum - 1].head)	2790	if (!signals [w->signum - 1].head)
		2791	{
		2792	#if EV_MULTIPLICITY
		2793	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2794	#endif
		2795	#if EV_USE_SIGNALFD
		2796	if (sigfd >= 0)
		2797	{
		2798	sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
		2799	sigdelset (&sigfd_set, w->signum);
		2800	signalfd (sigfd, &sigfd_set, 0);
		2801	sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
		2802	/*TODO: maybe unblock signal? */
		2803	}
		2804	else
		2805	#endif
2425	signal (w->signum, SIG_DFL);	2806	signal (w->signum, SIG_DFL);
		2807	}
2426		2808
2427	EV_FREQUENT_CHECK;	2809	EV_FREQUENT_CHECK;
2428	}	2810	}
2429		2811
2430	void	2812	void
…		…
2510	}	2892	}
2511	}	2893	}
2512		2894
2513	if (w->wd >= 0)	2895	if (w->wd >= 0)
2514	{	2896	{
		2897	struct statfs sfs;
		2898
2515	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2899	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2516		2900
2517	/* now local changes will be tracked by inotify, but remote changes won't */	2901	/* now local changes will be tracked by inotify, but remote changes won't */
2518	/* unless the filesystem it known to be local, we therefore still poll */	2902	/* unless the filesystem it known to be local, we therefore still poll */
2519	/* also do poll on <2.6.25, but with normal frequency */	2903	/* also do poll on <2.6.25, but with normal frequency */
2520	struct statfs sfs;
2521		2904
2522	if (fs_2625 && !statfs (w->path, &sfs))	2905	if (fs_2625 && !statfs (w->path, &sfs))
2523	if (sfs.f_type == 0x1373 /* devfs */	2906	if (sfs.f_type == 0x1373 /* devfs */
2524	|| sfs.f_type == 0xEF53 /* ext2/3 */	2907	|| sfs.f_type == 0xEF53 /* ext2/3 */
2525	|| sfs.f_type == 0x3153464a /* jfs */	2908	|| sfs.f_type == 0x3153464a /* jfs */
…		…
2591		2974
2592	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	2975	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2593	infy_wd (EV_A_ ev->wd, ev->wd, ev);	2976	infy_wd (EV_A_ ev->wd, ev->wd, ev);
2594	}	2977	}
2595		2978
2596	void inline_size	2979	inline_size void
2597	check_2625 (EV_P)	2980	check_2625 (EV_P)
2598	{	2981	{
2599	/* kernels < 2.6.25 are borked	2982	/* kernels < 2.6.25 are borked
2600	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	2983	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2601	*/	2984	*/
…		…
2614	return;	2997	return;
2615		2998
2616	fs_2625 = 1;	2999	fs_2625 = 1;
2617	}	3000	}
2618		3001
2619	void inline_size	3002	inline_size void
2620	infy_init (EV_P)	3003	infy_init (EV_P)
2621	{	3004	{
2622	if (fs_fd != -2)	3005	if (fs_fd != -2)
2623	return;	3006	return;
2624		3007
…		…
2634	ev_set_priority (&fs_w, EV_MAXPRI);	3017	ev_set_priority (&fs_w, EV_MAXPRI);
2635	ev_io_start (EV_A_ &fs_w);	3018	ev_io_start (EV_A_ &fs_w);
2636	}	3019	}
2637	}	3020	}
2638		3021
2639	void inline_size	3022	inline_size void
2640	infy_fork (EV_P)	3023	infy_fork (EV_P)
2641	{	3024	{
2642	int slot;	3025	int slot;
2643		3026
2644	if (fs_fd < 0)	3027	if (fs_fd < 0)
…		…
2910	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3293	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2911	{	3294	{
2912	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));	3295	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2913		3296
2914	{	3297	{
2915	struct ev_loop *loop = w->other;	3298	EV_P = w->other;
2916		3299
2917	while (fdchangecnt)	3300	while (fdchangecnt)
2918	{	3301	{
2919	fd_reify (EV_A);	3302	fd_reify (EV_A);
2920	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3303	ev_loop (EV_A_ EVLOOP_NONBLOCK);
…		…
2928	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3311	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2929		3312
2930	ev_embed_stop (EV_A_ w);	3313	ev_embed_stop (EV_A_ w);
2931		3314
2932	{	3315	{
2933	struct ev_loop *loop = w->other;	3316	EV_P = w->other;
2934		3317
2935	ev_loop_fork (EV_A);	3318	ev_loop_fork (EV_A);
2936	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3319	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2937	}	3320	}
2938		3321
…		…
2952	{	3335	{
2953	if (expect_false (ev_is_active (w)))	3336	if (expect_false (ev_is_active (w)))
2954	return;	3337	return;
2955		3338
2956	{	3339	{
2957	struct ev_loop *loop = w->other;	3340	EV_P = w->other;
2958	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3341	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2959	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3342	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2960	}	3343	}
2961		3344
2962	EV_FREQUENT_CHECK;	3345	EV_FREQUENT_CHECK;
…		…
3074		3457
3075	void	3458	void
3076	ev_async_send (EV_P_ ev_async *w)	3459	ev_async_send (EV_P_ ev_async *w)
3077	{	3460	{
3078	w->sent = 1;	3461	w->sent = 1;
3079	evpipe_write (EV_A_ &gotasync);	3462	evpipe_write (EV_A_ &async_pending);
3080	}	3463	}
3081	#endif	3464	#endif
3082		3465
3083	/*****************************************************************************/	3466	/*****************************************************************************/
3084		3467
…		…
3148	}	3531	}
3149	}	3532	}
3150		3533
3151	/*****************************************************************************/	3534	/*****************************************************************************/
3152		3535
3153	#if 0	3536	#if EV_WALK_ENABLE
3154	void	3537	void
3155	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))	3538	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3156	{	3539	{
3157	int i, j;	3540	int i, j;
3158	ev_watcher_list *wl, *wn;	3541	ev_watcher_list *wl, *wn;
…		…
3174	#if EV_USE_INOTIFY	3557	#if EV_USE_INOTIFY
3175	if (ev_cb ((ev_io *)wl) == infy_cb)	3558	if (ev_cb ((ev_io *)wl) == infy_cb)
3176	;	3559	;
3177	else	3560	else
3178	#endif	3561	#endif
3179	if ((ev_io *)wl != &pipeev)	3562	if ((ev_io *)wl != &pipe_w)
3180	if (types & EV_IO)	3563	if (types & EV_IO)
3181	cb (EV_A_ EV_IO, wl);	3564	cb (EV_A_ EV_IO, wl);
3182		3565
3183	wl = wn;	3566	wl = wn;
3184	}	3567	}
…		…
3233	if (types & EV_CHECK)	3616	if (types & EV_CHECK)
3234	for (i = checkcnt; i--; )	3617	for (i = checkcnt; i--; )
3235	cb (EV_A_ EV_CHECK, checks [i]);	3618	cb (EV_A_ EV_CHECK, checks [i]);
3236		3619
3237	if (types & EV_SIGNAL)	3620	if (types & EV_SIGNAL)
3238	for (i = 0; i < signalmax; ++i)	3621	for (i = 0; i < EV_NSIG - 1; ++i)
3239	for (wl = signals [i].head; wl; )	3622	for (wl = signals [i].head; wl; )
3240	{	3623	{
3241	wn = wl->next;	3624	wn = wl->next;
3242	cb (EV_A_ EV_SIGNAL, wl);	3625	cb (EV_A_ EV_SIGNAL, wl);
3243	wl = wn;	3626	wl = wn;

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