ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.286 by root, Wed Apr 15 19:37:15 2009 UTC vs.
Revision 1.321 by root, Thu Dec 31 06:50:17 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
…		…
143		153
144	#endif	154	#endif
145		155
146	#include <math.h>	156	#include <math.h>
147	#include <stdlib.h>	157	#include <stdlib.h>
		158	#include <string.h>
148	#include <fcntl.h>	159	#include <fcntl.h>
149	#include <stddef.h>	160	#include <stddef.h>
150		161
151	#include <stdio.h>	162	#include <stdio.h>
152		163
…		…
176	# endif	187	# endif
177	#endif	188	#endif
178		189
179	/* this block tries to deduce configuration from header-defined symbols and defaults */	190	/* this block tries to deduce configuration from header-defined symbols and defaults */
180		191
		192	/* try to deduce the maximum number of signals on this platform */
		193	#if defined (EV_NSIG)
		194	/* use what's provided */
		195	#elif defined (NSIG)
		196	# define EV_NSIG (NSIG)
		197	#elif defined(_NSIG)
		198	# define EV_NSIG (_NSIG)
		199	#elif defined (SIGMAX)
		200	# define EV_NSIG (SIGMAX+1)
		201	#elif defined (SIG_MAX)
		202	# define EV_NSIG (SIG_MAX+1)
		203	#elif defined (_SIG_MAX)
		204	# define EV_NSIG (_SIG_MAX+1)
		205	#elif defined (MAXSIG)
		206	# define EV_NSIG (MAXSIG+1)
		207	#elif defined (MAX_SIG)
		208	# define EV_NSIG (MAX_SIG+1)
		209	#elif defined (SIGARRAYSIZE)
		210	# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
		211	#elif defined (_sys_nsig)
		212	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		213	#else
		214	# error "unable to find value for NSIG, please report"
		215	/* to make it compile regardless, just remove the above line */
		216	# define EV_NSIG 65
		217	#endif
		218
181	#ifndef EV_USE_CLOCK_SYSCALL	219	#ifndef EV_USE_CLOCK_SYSCALL
182	# if __linux && __GLIBC__ >= 2	220	# if __linux && __GLIBC__ >= 2
183	# define EV_USE_CLOCK_SYSCALL 1	221	# define EV_USE_CLOCK_SYSCALL 1
184	# else	222	# else
185	# define EV_USE_CLOCK_SYSCALL 0	223	# define EV_USE_CLOCK_SYSCALL 0
…		…
264	# else	302	# else
265	# define EV_USE_EVENTFD 0	303	# define EV_USE_EVENTFD 0
266	# endif	304	# endif
267	#endif	305	#endif
268		306
		307	#ifndef EV_USE_SIGNALFD
		308	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		309	# define EV_USE_SIGNALFD 1
		310	# else
		311	# define EV_USE_SIGNALFD 0
		312	# endif
		313	#endif
		314
269	#if 0 /* debugging */	315	#if 0 /* debugging */
270	# define EV_VERIFY 3	316	# define EV_VERIFY 3
271	# define EV_USE_4HEAP 1	317	# define EV_USE_4HEAP 1
272	# define EV_HEAP_CACHE_AT 1	318	# define EV_HEAP_CACHE_AT 1
273	#endif	319	#endif
…		…
280	# define EV_USE_4HEAP !EV_MINIMAL	326	# define EV_USE_4HEAP !EV_MINIMAL
281	#endif	327	#endif
282		328
283	#ifndef EV_HEAP_CACHE_AT	329	#ifndef EV_HEAP_CACHE_AT
284	# define EV_HEAP_CACHE_AT !EV_MINIMAL	330	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		331	#endif
		332
		333	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		334	/* which makes programs even slower. might work on other unices, too. */
		335	#if EV_USE_CLOCK_SYSCALL
		336	# include <syscall.h>
		337	# ifdef SYS_clock_gettime
		338	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		339	# undef EV_USE_MONOTONIC
		340	# define EV_USE_MONOTONIC 1
		341	# else
		342	# undef EV_USE_CLOCK_SYSCALL
		343	# define EV_USE_CLOCK_SYSCALL 0
		344	# endif
285	#endif	345	#endif
286		346
287	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	347	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288		348
289	#ifndef CLOCK_MONOTONIC	349	#ifndef CLOCK_MONOTONIC
…		…
320		380
321	#if EV_SELECT_IS_WINSOCKET	381	#if EV_SELECT_IS_WINSOCKET
322	# include <winsock.h>	382	# include <winsock.h>
323	#endif	383	#endif
324		384
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	385	#if EV_USE_EVENTFD
335	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	386	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336	# include <stdint.h>	387	# include <stdint.h>
		388	# ifndef EFD_NONBLOCK
		389	# define EFD_NONBLOCK O_NONBLOCK
		390	# endif
		391	# ifndef EFD_CLOEXEC
		392	# ifdef O_CLOEXEC
		393	# define EFD_CLOEXEC O_CLOEXEC
		394	# else
		395	# define EFD_CLOEXEC 02000000
		396	# endif
		397	# endif
337	# ifdef __cplusplus	398	# ifdef __cplusplus
338	extern "C" {	399	extern "C" {
339	# endif	400	# endif
340	int eventfd (unsigned int initval, int flags);	401	int eventfd (unsigned int initval, int flags);
341	# ifdef __cplusplus	402	# ifdef __cplusplus
342	}	403	}
343	# endif	404	# endif
344	#endif	405	#endif
		406
		407	#if EV_USE_SIGNALFD
		408	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		409	# include <stdint.h>
		410	# ifndef SFD_NONBLOCK
		411	# define SFD_NONBLOCK O_NONBLOCK
		412	# endif
		413	# ifndef SFD_CLOEXEC
		414	# ifdef O_CLOEXEC
		415	# define SFD_CLOEXEC O_CLOEXEC
		416	# else
		417	# define SFD_CLOEXEC 02000000
		418	# endif
		419	# endif
		420	# ifdef __cplusplus
		421	extern "C" {
		422	# endif
		423	int signalfd (int fd, const sigset_t *mask, int flags);
		424
		425	struct signalfd_siginfo
		426	{
		427	uint32_t ssi_signo;
		428	char pad[128 - sizeof (uint32_t)];
		429	};
		430	# ifdef __cplusplus
		431	}
		432	# endif
		433	#endif
		434
345		435
346	/**/	436	/**/
347		437
348	#if EV_VERIFY >= 3	438	#if EV_VERIFY >= 3
349	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	439	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
…		…
361	*/	451	*/
362	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	452	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
363		453
364	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	454	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
365	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	455	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
366	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
367		456
368	#if __GNUC__ >= 4	457	#if __GNUC__ >= 4
369	# define expect(expr,value) __builtin_expect ((expr),(value))	458	# define expect(expr,value) __builtin_expect ((expr),(value))
370	# define noinline __attribute__ ((noinline))	459	# define noinline __attribute__ ((noinline))
371	#else	460	#else
…		…
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	inline_size ev_tstamp	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
…		…
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
		755	/* find a suitable new size for the given array, */
		756	/* hopefully by rounding to a ncie-to-malloc size */
630	inline_size int	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
…		…
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_);
…		…
724	}	857	}
725		858
726	/*****************************************************************************/	859	/*****************************************************************************/
727		860
728	inline_speed void	861	inline_speed void
729	fd_event (EV_P_ int fd, int revents)	862	fd_event_nc (EV_P_ int fd, int revents)
730	{	863	{
731	ANFD *anfd = anfds + fd;	864	ANFD *anfd = anfds + fd;
732	ev_io *w;	865	ev_io *w;
733		866
734	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)
…		…
738	if (ev)	871	if (ev)
739	ev_feed_event (EV_A_ (W)w, ev);	872	ev_feed_event (EV_A_ (W)w, ev);
740	}	873	}
741	}	874	}
742		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
743	void	887	void
744	ev_feed_fd_event (EV_P_ int fd, int revents)	888	ev_feed_fd_event (EV_P_ int fd, int revents)
745	{	889	{
746	if (fd >= 0 && fd < anfdmax)	890	if (fd >= 0 && fd < anfdmax)
747	fd_event (EV_A_ fd, revents);	891	fd_event_nc (EV_A_ fd, revents);
748	}	892	}
749		893
		894	/* make sure the external fd watch events are in-sync */
		895	/* with the kernel/libev internal state */
750	inline_size void	896	inline_size void
751	fd_reify (EV_P)	897	fd_reify (EV_P)
752	{	898	{
753	int i;	899	int i;
754		900
…		…
765		911
766	#if EV_SELECT_IS_WINSOCKET	912	#if EV_SELECT_IS_WINSOCKET
767	if (events)	913	if (events)
768	{	914	{
769	unsigned long arg;	915	unsigned long arg;
770	#ifdef EV_FD_TO_WIN32_HANDLE
771	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	916	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
772	#else
773	anfd->handle = _get_osfhandle (fd);
774	#endif
775	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));
776	}	918	}
777	#endif	919	#endif
778		920
779	{	921	{
…		…
789	}	931	}
790		932
791	fdchangecnt = 0;	933	fdchangecnt = 0;
792	}	934	}
793		935
		936	/* something about the given fd changed */
794	inline_size void	937	inline_size void
795	fd_change (EV_P_ int fd, int flags)	938	fd_change (EV_P_ int fd, int flags)
796	{	939	{
797	unsigned char reify = anfds [fd].reify;	940	unsigned char reify = anfds [fd].reify;
798	anfds [fd].reify |= flags;	941	anfds [fd].reify |= flags;
…		…
803	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	946	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
804	fdchanges [fdchangecnt - 1] = fd;	947	fdchanges [fdchangecnt - 1] = fd;
805	}	948	}
806	}	949	}
807		950
		951	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
808	inline_speed void	952	inline_speed void
809	fd_kill (EV_P_ int fd)	953	fd_kill (EV_P_ int fd)
810	{	954	{
811	ev_io *w;	955	ev_io *w;
812		956
…		…
815	ev_io_stop (EV_A_ w);	959	ev_io_stop (EV_A_ w);
816	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);
817	}	961	}
818	}	962	}
819		963
		964	/* check whether the given fd is atcually valid, for error recovery */
820	inline_size int	965	inline_size int
821	fd_valid (int fd)	966	fd_valid (int fd)
822	{	967	{
823	#ifdef _WIN32	968	#ifdef _WIN32
824	return _get_osfhandle (fd) != -1;	969	return _get_osfhandle (fd) != -1;
…		…
847		992
848	for (fd = anfdmax; fd--; )	993	for (fd = anfdmax; fd--; )
849	if (anfds [fd].events)	994	if (anfds [fd].events)
850	{	995	{
851	fd_kill (EV_A_ fd);	996	fd_kill (EV_A_ fd);
852	return;	997	break;
853	}	998	}
854	}	999	}
855		1000
856	/* 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 */
857	static void noinline	1002	static void noinline
…		…
862	for (fd = 0; fd < anfdmax; ++fd)	1007	for (fd = 0; fd < anfdmax; ++fd)
863	if (anfds [fd].events)	1008	if (anfds [fd].events)
864	{	1009	{
865	anfds [fd].events = 0;	1010	anfds [fd].events = 0;
866	anfds [fd].emask = 0;	1011	anfds [fd].emask = 0;
867	fd_change (EV_A_ fd, EV__IOFDSET | 1);	1012	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
868	}	1013	}
869	}	1014	}
870		1015
871	/*****************************************************************************/	1016	/*****************************************************************************/
872		1017
…		…
947		1092
948	for (;;)	1093	for (;;)
949	{	1094	{
950	int c = k << 1;	1095	int c = k << 1;
951		1096
952	if (c > N + HEAP0 - 1)	1097	if (c >= N + HEAP0)
953	break;	1098	break;
954		1099
955	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])
956	? 1 : 0;	1101	? 1 : 0;
957		1102
…		…
989		1134
990	heap [k] = he;	1135	heap [k] = he;
991	ev_active (ANHE_w (he)) = k;	1136	ev_active (ANHE_w (he)) = k;
992	}	1137	}
993		1138
		1139	/* move an element suitably so it is in a correct place */
994	inline_size void	1140	inline_size void
995	adjustheap (ANHE *heap, int N, int k)	1141	adjustheap (ANHE *heap, int N, int k)
996	{	1142	{
997	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)]))
998	upheap (heap, k);	1144	upheap (heap, k);
999	else	1145	else
1000	downheap (heap, N, k);	1146	downheap (heap, N, k);
1001	}	1147	}
1002		1148
…		…
1012	upheap (heap, i + HEAP0);	1158	upheap (heap, i + HEAP0);
1013	}	1159	}
1014		1160
1015	/*****************************************************************************/	1161	/*****************************************************************************/
1016		1162
		1163	/* associate signal watchers to a signal signal */
1017	typedef struct	1164	typedef struct
1018	{	1165	{
		1166	EV_ATOMIC_T pending;
		1167	#if EV_MULTIPLICITY
		1168	EV_P;
		1169	#endif
1019	WL head;	1170	WL head;
1020	EV_ATOMIC_T gotsig;
1021	} ANSIG;	1171	} ANSIG;
1022		1172
1023	static ANSIG *signals;	1173	static ANSIG signals [EV_NSIG - 1];
1024	static int signalmax;
1025
1026	static EV_ATOMIC_T gotsig;
1027		1174
1028	/*****************************************************************************/	1175	/*****************************************************************************/
1029		1176
		1177	/* used to prepare libev internal fd's */
		1178	/* this is not fork-safe */
1030	inline_speed void	1179	inline_speed void
1031	fd_intern (int fd)	1180	fd_intern (int fd)
1032	{	1181	{
1033	#ifdef _WIN32	1182	#ifdef _WIN32
1034	unsigned long arg = 1;	1183	unsigned long arg = 1;
…		…
1040	}	1189	}
1041		1190
1042	static void noinline	1191	static void noinline
1043	evpipe_init (EV_P)	1192	evpipe_init (EV_P)
1044	{	1193	{
1045	if (!ev_is_active (&pipeev))	1194	if (!ev_is_active (&pipe_w))
1046	{	1195	{
1047	#if EV_USE_EVENTFD	1196	#if EV_USE_EVENTFD
		1197	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1198	if (evfd < 0 && errno == EINVAL)
1048	if ((evfd = eventfd (0, 0)) >= 0)	1199	evfd = eventfd (0, 0);
		1200
		1201	if (evfd >= 0)
1049	{	1202	{
1050	evpipe [0] = -1;	1203	evpipe [0] = -1;
1051	fd_intern (evfd);	1204	fd_intern (evfd); /* doing it twice doesn't hurt */
1052	ev_io_set (&pipeev, evfd, EV_READ);	1205	ev_io_set (&pipe_w, evfd, EV_READ);
1053	}	1206	}
1054	else	1207	else
1055	#endif	1208	#endif
1056	{	1209	{
1057	while (pipe (evpipe))	1210	while (pipe (evpipe))
1058	ev_syserr ("(libev) error creating signal/async pipe");	1211	ev_syserr ("(libev) error creating signal/async pipe");
1059		1212
1060	fd_intern (evpipe [0]);	1213	fd_intern (evpipe [0]);
1061	fd_intern (evpipe [1]);	1214	fd_intern (evpipe [1]);
1062	ev_io_set (&pipeev, evpipe [0], EV_READ);	1215	ev_io_set (&pipe_w, evpipe [0], EV_READ);
1063	}	1216	}
1064		1217
1065	ev_io_start (EV_A_ &pipeev);	1218	ev_io_start (EV_A_ &pipe_w);
1066	ev_unref (EV_A); /* watcher should not keep loop alive */	1219	ev_unref (EV_A); /* watcher should not keep loop alive */
1067	}	1220	}
1068	}	1221	}
1069		1222
1070	inline_size void	1223	inline_size void
…		…
1088		1241
1089	errno = old_errno;	1242	errno = old_errno;
1090	}	1243	}
1091	}	1244	}
1092		1245
		1246	/* called whenever the libev signal pipe */
		1247	/* got some events (signal, async) */
1093	static void	1248	static void
1094	pipecb (EV_P_ ev_io *iow, int revents)	1249	pipecb (EV_P_ ev_io *iow, int revents)
1095	{	1250	{
		1251	int i;
		1252
1096	#if EV_USE_EVENTFD	1253	#if EV_USE_EVENTFD
1097	if (evfd >= 0)	1254	if (evfd >= 0)
1098	{	1255	{
1099	uint64_t counter;	1256	uint64_t counter;
1100	read (evfd, &counter, sizeof (uint64_t));	1257	read (evfd, &counter, sizeof (uint64_t));
…		…
1104	{	1261	{
1105	char dummy;	1262	char dummy;
1106	read (evpipe [0], &dummy, 1);	1263	read (evpipe [0], &dummy, 1);
1107	}	1264	}
1108		1265
1109	if (gotsig && ev_is_default_loop (EV_A))	1266	if (sig_pending)
1110	{	1267	{
1111	int signum;	1268	sig_pending = 0;
1112	gotsig = 0;
1113		1269
1114	for (signum = signalmax; signum--; )	1270	for (i = EV_NSIG - 1; i--; )
1115	if (signals [signum].gotsig)	1271	if (expect_false (signals [i].pending))
1116	ev_feed_signal_event (EV_A_ signum + 1);	1272	ev_feed_signal_event (EV_A_ i + 1);
1117	}	1273	}
1118		1274
1119	#if EV_ASYNC_ENABLE	1275	#if EV_ASYNC_ENABLE
1120	if (gotasync)	1276	if (async_pending)
1121	{	1277	{
1122	int i;	1278	async_pending = 0;
1123	gotasync = 0;
1124		1279
1125	for (i = asynccnt; i--; )	1280	for (i = asynccnt; i--; )
1126	if (asyncs [i]->sent)	1281	if (asyncs [i]->sent)
1127	{	1282	{
1128	asyncs [i]->sent = 0;	1283	asyncs [i]->sent = 0;
…		…
1136		1291
1137	static void	1292	static void
1138	ev_sighandler (int signum)	1293	ev_sighandler (int signum)
1139	{	1294	{
1140	#if EV_MULTIPLICITY	1295	#if EV_MULTIPLICITY
1141	struct ev_loop *loop = &default_loop_struct;	1296	EV_P = signals [signum - 1].loop;
1142	#endif	1297	#endif
1143		1298
1144	#if _WIN32	1299	#if _WIN32
1145	signal (signum, ev_sighandler);	1300	signal (signum, ev_sighandler);
1146	#endif	1301	#endif
1147		1302
1148	signals [signum - 1].gotsig = 1;	1303	signals [signum - 1].pending = 1;
1149	evpipe_write (EV_A_ &gotsig);	1304	evpipe_write (EV_A_ &sig_pending);
1150	}	1305	}
1151		1306
1152	void noinline	1307	void noinline
1153	ev_feed_signal_event (EV_P_ int signum)	1308	ev_feed_signal_event (EV_P_ int signum)
1154	{	1309	{
1155	WL w;	1310	WL w;
1156		1311
		1312	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1313	return;
		1314
		1315	--signum;
		1316
1157	#if EV_MULTIPLICITY	1317	#if EV_MULTIPLICITY
1158	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 */
1159	#endif	1319	/* or, likely more useful, feeding a signal nobody is waiting for */
1160		1320
1161	--signum;	1321	if (expect_false (signals [signum].loop != EV_A))
1162
1163	if (signum < 0 || signum >= signalmax)
1164	return;	1322	return;
		1323	#endif
1165		1324
1166	signals [signum].gotsig = 0;	1325	signals [signum].pending = 0;
1167		1326
1168	for (w = signals [signum].head; w; w = w->next)	1327	for (w = signals [signum].head; w; w = w->next)
1169	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1328	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1170	}	1329	}
1171		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
1172	/*****************************************************************************/	1351	/*****************************************************************************/
1173		1352
1174	static WL childs [EV_PID_HASHSIZE];	1353	static WL childs [EV_PID_HASHSIZE];
1175		1354
1176	#ifndef _WIN32	1355	#ifndef _WIN32
…		…
1179		1358
1180	#ifndef WIFCONTINUED	1359	#ifndef WIFCONTINUED
1181	# define WIFCONTINUED(status) 0	1360	# define WIFCONTINUED(status) 0
1182	#endif	1361	#endif
1183		1362
		1363	/* handle a single child status event */
1184	inline_speed void	1364	inline_speed void
1185	child_reap (EV_P_ int chain, int pid, int status)	1365	child_reap (EV_P_ int chain, int pid, int status)
1186	{	1366	{
1187	ev_child *w;	1367	ev_child *w;
1188	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);	1368	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
…		…
1202		1382
1203	#ifndef WCONTINUED	1383	#ifndef WCONTINUED
1204	# define WCONTINUED 0	1384	# define WCONTINUED 0
1205	#endif	1385	#endif
1206		1386
		1387	/* called on sigchld etc., calls waitpid */
1207	static void	1388	static void
1208	childcb (EV_P_ ev_signal *sw, int revents)	1389	childcb (EV_P_ ev_signal *sw, int revents)
1209	{	1390	{
1210	int pid, status;	1391	int pid, status;
1211		1392
…		…
1318	ev_backend (EV_P)	1499	ev_backend (EV_P)
1319	{	1500	{
1320	return backend;	1501	return backend;
1321	}	1502	}
1322		1503
		1504	#if EV_MINIMAL < 2
1323	unsigned int	1505	unsigned int
1324	ev_loop_count (EV_P)	1506	ev_loop_count (EV_P)
1325	{	1507	{
1326	return loop_count;	1508	return loop_count;
1327	}	1509	}
1328		1510
		1511	unsigned int
		1512	ev_loop_depth (EV_P)
		1513	{
		1514	return loop_depth;
		1515	}
		1516
1329	void	1517	void
1330	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1518	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1331	{	1519	{
1332	io_blocktime = interval;	1520	io_blocktime = interval;
1333	}	1521	}
…		…
1336	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1524	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1337	{	1525	{
1338	timeout_blocktime = interval;	1526	timeout_blocktime = interval;
1339	}	1527	}
1340		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 */
1341	static void noinline	1554	static void noinline
1342	loop_init (EV_P_ unsigned int flags)	1555	loop_init (EV_P_ unsigned int flags)
1343	{	1556	{
1344	if (!backend)	1557	if (!backend)
1345	{	1558	{
…		…
1361	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1574	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1362	have_monotonic = 1;	1575	have_monotonic = 1;
1363	}	1576	}
1364	#endif	1577	#endif
1365		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
1366	ev_rt_now = ev_time ();	1590	ev_rt_now = ev_time ();
1367	mn_now = get_clock ();	1591	mn_now = get_clock ();
1368	now_floor = mn_now;	1592	now_floor = mn_now;
1369	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
1370		1597
1371	io_blocktime = 0.;	1598	io_blocktime = 0.;
1372	timeout_blocktime = 0.;	1599	timeout_blocktime = 0.;
1373	backend = 0;	1600	backend = 0;
1374	backend_fd = -1;	1601	backend_fd = -1;
1375	gotasync = 0;	1602	sig_pending = 0;
		1603	#if EV_ASYNC_ENABLE
		1604	async_pending = 0;
		1605	#endif
1376	#if EV_USE_INOTIFY	1606	#if EV_USE_INOTIFY
1377	fs_fd = -2;	1607	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1378	#endif	1608	#endif
1379		1609	#if EV_USE_SIGNALFD
1380	/* pid check not overridable via env */	1610	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1381	#ifndef _WIN32
1382	if (flags & EVFLAG_FORKCHECK)
1383	curpid = getpid ();
1384	#endif	1611	#endif
1385
1386	if (!(flags & EVFLAG_NOENV)
1387	&& !enable_secure ()
1388	&& getenv ("LIBEV_FLAGS"))
1389	flags = atoi (getenv ("LIBEV_FLAGS"));
1390		1612
1391	if (!(flags & 0x0000ffffU))	1613	if (!(flags & 0x0000ffffU))
1392	flags |= ev_recommended_backends ();	1614	flags |= ev_recommended_backends ();
1393		1615
1394	#if EV_USE_PORT	1616	#if EV_USE_PORT
…		…
1405	#endif	1627	#endif
1406	#if EV_USE_SELECT	1628	#if EV_USE_SELECT
1407	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1629	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1408	#endif	1630	#endif
1409		1631
		1632	ev_prepare_init (&pending_w, pendingcb);
		1633
1410	ev_init (&pipeev, pipecb);	1634	ev_init (&pipe_w, pipecb);
1411	ev_set_priority (&pipeev, EV_MAXPRI);	1635	ev_set_priority (&pipe_w, EV_MAXPRI);
1412	}	1636	}
1413	}	1637	}
1414		1638
		1639	/* free up a loop structure */
1415	static void noinline	1640	static void noinline
1416	loop_destroy (EV_P)	1641	loop_destroy (EV_P)
1417	{	1642	{
1418	int i;	1643	int i;
1419		1644
1420	if (ev_is_active (&pipeev))	1645	if (ev_is_active (&pipe_w))
1421	{	1646	{
1422	ev_ref (EV_A); /* signal watcher */	1647	/*ev_ref (EV_A);*/
1423	ev_io_stop (EV_A_ &pipeev);	1648	/*ev_io_stop (EV_A_ &pipe_w);*/
1424		1649
1425	#if EV_USE_EVENTFD	1650	#if EV_USE_EVENTFD
1426	if (evfd >= 0)	1651	if (evfd >= 0)
1427	close (evfd);	1652	close (evfd);
1428	#endif	1653	#endif
1429		1654
1430	if (evpipe [0] >= 0)	1655	if (evpipe [0] >= 0)
1431	{	1656	{
1432	close (evpipe [0]);	1657	EV_WIN32_CLOSE_FD (evpipe [0]);
1433	close (evpipe [1]);	1658	EV_WIN32_CLOSE_FD (evpipe [1]);
1434	}	1659	}
1435	}	1660	}
		1661
		1662	#if EV_USE_SIGNALFD
		1663	if (ev_is_active (&sigfd_w))
		1664	close (sigfd);
		1665	#endif
1436		1666
1437	#if EV_USE_INOTIFY	1667	#if EV_USE_INOTIFY
1438	if (fs_fd >= 0)	1668	if (fs_fd >= 0)
1439	close (fs_fd);	1669	close (fs_fd);
1440	#endif	1670	#endif
…		…
1464	#if EV_IDLE_ENABLE	1694	#if EV_IDLE_ENABLE
1465	array_free (idle, [i]);	1695	array_free (idle, [i]);
1466	#endif	1696	#endif
1467	}	1697	}
1468		1698
1469	ev_free (anfds); anfdmax = 0;	1699	ev_free (anfds); anfds = 0; anfdmax = 0;
1470		1700
1471	/* have to use the microsoft-never-gets-it-right macro */	1701	/* have to use the microsoft-never-gets-it-right macro */
1472	array_free (rfeed, EMPTY);	1702	array_free (rfeed, EMPTY);
1473	array_free (fdchange, EMPTY);	1703	array_free (fdchange, EMPTY);
1474	array_free (timer, EMPTY);	1704	array_free (timer, EMPTY);
…		…
1505	#endif	1735	#endif
1506	#if EV_USE_INOTIFY	1736	#if EV_USE_INOTIFY
1507	infy_fork (EV_A);	1737	infy_fork (EV_A);
1508	#endif	1738	#endif
1509		1739
1510	if (ev_is_active (&pipeev))	1740	if (ev_is_active (&pipe_w))
1511	{	1741	{
1512	/* this "locks" the handlers against writing to the pipe */	1742	/* this "locks" the handlers against writing to the pipe */
1513	/* while we modify the fd vars */	1743	/* while we modify the fd vars */
1514	gotsig = 1;	1744	sig_pending = 1;
1515	#if EV_ASYNC_ENABLE	1745	#if EV_ASYNC_ENABLE
1516	gotasync = 1;	1746	async_pending = 1;
1517	#endif	1747	#endif
1518		1748
1519	ev_ref (EV_A);	1749	ev_ref (EV_A);
1520	ev_io_stop (EV_A_ &pipeev);	1750	ev_io_stop (EV_A_ &pipe_w);
1521		1751
1522	#if EV_USE_EVENTFD	1752	#if EV_USE_EVENTFD
1523	if (evfd >= 0)	1753	if (evfd >= 0)
1524	close (evfd);	1754	close (evfd);
1525	#endif	1755	#endif
1526		1756
1527	if (evpipe [0] >= 0)	1757	if (evpipe [0] >= 0)
1528	{	1758	{
1529	close (evpipe [0]);	1759	EV_WIN32_CLOSE_FD (evpipe [0]);
1530	close (evpipe [1]);	1760	EV_WIN32_CLOSE_FD (evpipe [1]);
1531	}	1761	}
1532		1762
1533	evpipe_init (EV_A);	1763	evpipe_init (EV_A);
1534	/* now iterate over everything, in case we missed something */	1764	/* now iterate over everything, in case we missed something */
1535	pipecb (EV_A_ &pipeev, EV_READ);	1765	pipecb (EV_A_ &pipe_w, EV_READ);
1536	}	1766	}
1537		1767
1538	postfork = 0;	1768	postfork = 0;
1539	}	1769	}
1540		1770
1541	#if EV_MULTIPLICITY	1771	#if EV_MULTIPLICITY
1542		1772
1543	struct ev_loop *	1773	struct ev_loop *
1544	ev_loop_new (unsigned int flags)	1774	ev_loop_new (unsigned int flags)
1545	{	1775	{
1546	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1776	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1547		1777
1548	memset (loop, 0, sizeof (struct ev_loop));	1778	memset (EV_A, 0, sizeof (struct ev_loop));
1549
1550	loop_init (EV_A_ flags);	1779	loop_init (EV_A_ flags);
1551		1780
1552	if (ev_backend (EV_A))	1781	if (ev_backend (EV_A))
1553	return loop;	1782	return EV_A;
1554		1783
1555	return 0;	1784	return 0;
1556	}	1785	}
1557		1786
1558	void	1787	void
…		…
1565	void	1794	void
1566	ev_loop_fork (EV_P)	1795	ev_loop_fork (EV_P)
1567	{	1796	{
1568	postfork = 1; /* must be in line with ev_default_fork */	1797	postfork = 1; /* must be in line with ev_default_fork */
1569	}	1798	}
		1799	#endif /* multiplicity */
1570		1800
1571	#if EV_VERIFY	1801	#if EV_VERIFY
1572	static void noinline	1802	static void noinline
1573	verify_watcher (EV_P_ W w)	1803	verify_watcher (EV_P_ W w)
1574	{	1804	{
…		…
1602	verify_watcher (EV_A_ ws [cnt]);	1832	verify_watcher (EV_A_ ws [cnt]);
1603	}	1833	}
1604	}	1834	}
1605	#endif	1835	#endif
1606		1836
		1837	#if EV_MINIMAL < 2
1607	void	1838	void
1608	ev_loop_verify (EV_P)	1839	ev_loop_verify (EV_P)
1609	{	1840	{
1610	#if EV_VERIFY	1841	#if EV_VERIFY
1611	int i;	1842	int i;
…		…
1660	assert (checkmax >= checkcnt);	1891	assert (checkmax >= checkcnt);
1661	array_verify (EV_A_ (W *)checks, checkcnt);	1892	array_verify (EV_A_ (W *)checks, checkcnt);
1662		1893
1663	# if 0	1894	# if 0
1664	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1895	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1665	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)	1896	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1666	# endif
1667	#endif	1897	# endif
		1898	#endif
1668	}	1899	}
1669		1900	#endif
1670	#endif /* multiplicity */
1671		1901
1672	#if EV_MULTIPLICITY	1902	#if EV_MULTIPLICITY
1673	struct ev_loop *	1903	struct ev_loop *
1674	ev_default_loop_init (unsigned int flags)	1904	ev_default_loop_init (unsigned int flags)
1675	#else	1905	#else
…		…
1678	#endif	1908	#endif
1679	{	1909	{
1680	if (!ev_default_loop_ptr)	1910	if (!ev_default_loop_ptr)
1681	{	1911	{
1682	#if EV_MULTIPLICITY	1912	#if EV_MULTIPLICITY
1683	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1913	EV_P = ev_default_loop_ptr = &default_loop_struct;
1684	#else	1914	#else
1685	ev_default_loop_ptr = 1;	1915	ev_default_loop_ptr = 1;
1686	#endif	1916	#endif
1687		1917
1688	loop_init (EV_A_ flags);	1918	loop_init (EV_A_ flags);
…		…
1705		1935
1706	void	1936	void
1707	ev_default_destroy (void)	1937	ev_default_destroy (void)
1708	{	1938	{
1709	#if EV_MULTIPLICITY	1939	#if EV_MULTIPLICITY
1710	struct ev_loop *loop = ev_default_loop_ptr;	1940	EV_P = ev_default_loop_ptr;
1711	#endif	1941	#endif
1712		1942
1713	ev_default_loop_ptr = 0;	1943	ev_default_loop_ptr = 0;
1714		1944
1715	#ifndef _WIN32	1945	#ifndef _WIN32
…		…
1722		1952
1723	void	1953	void
1724	ev_default_fork (void)	1954	ev_default_fork (void)
1725	{	1955	{
1726	#if EV_MULTIPLICITY	1956	#if EV_MULTIPLICITY
1727	struct ev_loop *loop = ev_default_loop_ptr;	1957	EV_P = ev_default_loop_ptr;
1728	#endif	1958	#endif
1729		1959
1730	postfork = 1; /* must be in line with ev_loop_fork */	1960	postfork = 1; /* must be in line with ev_loop_fork */
1731	}	1961	}
1732		1962
…		…
1736	ev_invoke (EV_P_ void *w, int revents)	1966	ev_invoke (EV_P_ void *w, int revents)
1737	{	1967	{
1738	EV_CB_INVOKE ((W)w, revents);	1968	EV_CB_INVOKE ((W)w, revents);
1739	}	1969	}
1740		1970
1741	inline_speed void	1971	unsigned int
1742	call_pending (EV_P)	1972	ev_pending_count (EV_P)
		1973	{
		1974	int pri;
		1975	unsigned int count = 0;
		1976
		1977	for (pri = NUMPRI; pri--; )
		1978	count += pendingcnt [pri];
		1979
		1980	return count;
		1981	}
		1982
		1983	void noinline
		1984	ev_invoke_pending (EV_P)
1743	{	1985	{
1744	int pri;	1986	int pri;
1745		1987
1746	for (pri = NUMPRI; pri--; )	1988	for (pri = NUMPRI; pri--; )
1747	while (pendingcnt [pri])	1989	while (pendingcnt [pri])
1748	{	1990	{
1749	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1991	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1750		1992
1751	if (expect_true (p->w))
1752	{
1753	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/	1993	/*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
		1994	/* ^ this is no longer true, as pending_w could be here */
1754		1995
1755	p->w->pending = 0;	1996	p->w->pending = 0;
1756	EV_CB_INVOKE (p->w, p->events);	1997	EV_CB_INVOKE (p->w, p->events);
1757	EV_FREQUENT_CHECK;	1998	EV_FREQUENT_CHECK;
1758	}
1759	}	1999	}
1760	}	2000	}
1761		2001
1762	#if EV_IDLE_ENABLE	2002	#if EV_IDLE_ENABLE
		2003	/* make idle watchers pending. this handles the "call-idle */
		2004	/* only when higher priorities are idle" logic */
1763	inline_size void	2005	inline_size void
1764	idle_reify (EV_P)	2006	idle_reify (EV_P)
1765	{	2007	{
1766	if (expect_false (idleall))	2008	if (expect_false (idleall))
1767	{	2009	{
…		…
1780	}	2022	}
1781	}	2023	}
1782	}	2024	}
1783	#endif	2025	#endif
1784		2026
		2027	/* make timers pending */
1785	inline_size void	2028	inline_size void
1786	timers_reify (EV_P)	2029	timers_reify (EV_P)
1787	{	2030	{
1788	EV_FREQUENT_CHECK;	2031	EV_FREQUENT_CHECK;
1789		2032
…		…
1818	feed_reverse_done (EV_A_ EV_TIMEOUT);	2061	feed_reverse_done (EV_A_ EV_TIMEOUT);
1819	}	2062	}
1820	}	2063	}
1821		2064
1822	#if EV_PERIODIC_ENABLE	2065	#if EV_PERIODIC_ENABLE
		2066	/* make periodics pending */
1823	inline_size void	2067	inline_size void
1824	periodics_reify (EV_P)	2068	periodics_reify (EV_P)
1825	{	2069	{
1826	EV_FREQUENT_CHECK;	2070	EV_FREQUENT_CHECK;
1827		2071
…		…
1874		2118
1875	feed_reverse_done (EV_A_ EV_PERIODIC);	2119	feed_reverse_done (EV_A_ EV_PERIODIC);
1876	}	2120	}
1877	}	2121	}
1878		2122
		2123	/* simply recalculate all periodics */
		2124	/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1879	static void noinline	2125	static void noinline
1880	periodics_reschedule (EV_P)	2126	periodics_reschedule (EV_P)
1881	{	2127	{
1882	int i;	2128	int i;
1883		2129
…		…
1896		2142
1897	reheap (periodics, periodiccnt);	2143	reheap (periodics, periodiccnt);
1898	}	2144	}
1899	#endif	2145	#endif
1900		2146
		2147	/* adjust all timers by a given offset */
1901	static void noinline	2148	static void noinline
1902	timers_reschedule (EV_P_ ev_tstamp adjust)	2149	timers_reschedule (EV_P_ ev_tstamp adjust)
1903	{	2150	{
1904	int i;	2151	int i;
1905		2152
…		…
1909	ANHE_w (*he)->at += adjust;	2156	ANHE_w (*he)->at += adjust;
1910	ANHE_at_cache (*he);	2157	ANHE_at_cache (*he);
1911	}	2158	}
1912	}	2159	}
1913		2160
		2161	/* fetch new monotonic and realtime times from the kernel */
		2162	/* also detetc if there was a timejump, and act accordingly */
1914	inline_speed void	2163	inline_speed void
1915	time_update (EV_P_ ev_tstamp max_block)	2164	time_update (EV_P_ ev_tstamp max_block)
1916	{	2165	{
1917	int i;
1918
1919	#if EV_USE_MONOTONIC	2166	#if EV_USE_MONOTONIC
1920	if (expect_true (have_monotonic))	2167	if (expect_true (have_monotonic))
1921	{	2168	{
		2169	int i;
1922	ev_tstamp odiff = rtmn_diff;	2170	ev_tstamp odiff = rtmn_diff;
1923		2171
1924	mn_now = get_clock ();	2172	mn_now = get_clock ();
1925		2173
1926	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	2174	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
1976		2224
1977	mn_now = ev_rt_now;	2225	mn_now = ev_rt_now;
1978	}	2226	}
1979	}	2227	}
1980		2228
1981	static int loop_done;
1982
1983	void	2229	void
1984	ev_loop (EV_P_ int flags)	2230	ev_loop (EV_P_ int flags)
1985	{	2231	{
		2232	#if EV_MINIMAL < 2
		2233	++loop_depth;
		2234	#endif
		2235
		2236	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
		2237
1986	loop_done = EVUNLOOP_CANCEL;	2238	loop_done = EVUNLOOP_CANCEL;
1987		2239
1988	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2240	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1989		2241
1990	do	2242	do
1991	{	2243	{
1992	#if EV_VERIFY >= 2	2244	#if EV_VERIFY >= 2
1993	ev_loop_verify (EV_A);	2245	ev_loop_verify (EV_A);
…		…
2006	/* we might have forked, so queue fork handlers */	2258	/* we might have forked, so queue fork handlers */
2007	if (expect_false (postfork))	2259	if (expect_false (postfork))
2008	if (forkcnt)	2260	if (forkcnt)
2009	{	2261	{
2010	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2262	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2011	call_pending (EV_A);	2263	EV_INVOKE_PENDING;
2012	}	2264	}
2013	#endif	2265	#endif
2014		2266
2015	/* queue prepare watchers (and execute them) */	2267	/* queue prepare watchers (and execute them) */
2016	if (expect_false (preparecnt))	2268	if (expect_false (preparecnt))
2017	{	2269	{
2018	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2270	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2019	call_pending (EV_A);	2271	EV_INVOKE_PENDING;
2020	}	2272	}
		2273
		2274	if (expect_false (loop_done))
		2275	break;
2021		2276
2022	/* we might have forked, so reify kernel state if necessary */	2277	/* we might have forked, so reify kernel state if necessary */
2023	if (expect_false (postfork))	2278	if (expect_false (postfork))
2024	loop_fork (EV_A);	2279	loop_fork (EV_A);
2025		2280
…		…
2031	ev_tstamp waittime = 0.;	2286	ev_tstamp waittime = 0.;
2032	ev_tstamp sleeptime = 0.;	2287	ev_tstamp sleeptime = 0.;
2033		2288
2034	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2289	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2035	{	2290	{
		2291	/* remember old timestamp for io_blocktime calculation */
		2292	ev_tstamp prev_mn_now = mn_now;
		2293
2036	/* update time to cancel out callback processing overhead */	2294	/* update time to cancel out callback processing overhead */
2037	time_update (EV_A_ 1e100);	2295	time_update (EV_A_ 1e100);
		2296
		2297	waittime = MAX_BLOCKTIME;
2038		2298
2039	if (timercnt)	2299	if (timercnt)
2040	{	2300	{
2041	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2301	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2042	if (waittime > to) waittime = to;	2302	if (waittime > to) waittime = to;
…		…
2048	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2308	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2049	if (waittime > to) waittime = to;	2309	if (waittime > to) waittime = to;
2050	}	2310	}
2051	#endif	2311	#endif
2052		2312
		2313	/* don't let timeouts decrease the waittime below timeout_blocktime */
2053	if (expect_false (waittime < timeout_blocktime))	2314	if (expect_false (waittime < timeout_blocktime))
2054	waittime = timeout_blocktime;	2315	waittime = timeout_blocktime;
2055		2316
2056	sleeptime = waittime - backend_fudge;	2317	/* extra check because io_blocktime is commonly 0 */
2057
2058	if (expect_true (sleeptime > io_blocktime))	2318	if (expect_false (io_blocktime))
2059	sleeptime = io_blocktime;
2060
2061	if (sleeptime)
2062	{	2319	{
		2320	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2321
		2322	if (sleeptime > waittime - backend_fudge)
		2323	sleeptime = waittime - backend_fudge;
		2324
		2325	if (expect_true (sleeptime > 0.))
		2326	{
2063	ev_sleep (sleeptime);	2327	ev_sleep (sleeptime);
2064	waittime -= sleeptime;	2328	waittime -= sleeptime;
		2329	}
2065	}	2330	}
2066	}	2331	}
2067		2332
		2333	#if EV_MINIMAL < 2
2068	++loop_count;	2334	++loop_count;
		2335	#endif
		2336	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2069	backend_poll (EV_A_ waittime);	2337	backend_poll (EV_A_ waittime);
		2338	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2070		2339
2071	/* update ev_rt_now, do magic */	2340	/* update ev_rt_now, do magic */
2072	time_update (EV_A_ waittime + sleeptime);	2341	time_update (EV_A_ waittime + sleeptime);
2073	}	2342	}
2074		2343
…		…
2085		2354
2086	/* queue check watchers, to be executed first */	2355	/* queue check watchers, to be executed first */
2087	if (expect_false (checkcnt))	2356	if (expect_false (checkcnt))
2088	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2357	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2089		2358
2090	call_pending (EV_A);	2359	EV_INVOKE_PENDING;
2091	}	2360	}
2092	while (expect_true (	2361	while (expect_true (
2093	activecnt	2362	activecnt
2094	&& !loop_done	2363	&& !loop_done
2095	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2364	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2096	));	2365	));
2097		2366
2098	if (loop_done == EVUNLOOP_ONE)	2367	if (loop_done == EVUNLOOP_ONE)
2099	loop_done = EVUNLOOP_CANCEL;	2368	loop_done = EVUNLOOP_CANCEL;
		2369
		2370	#if EV_MINIMAL < 2
		2371	--loop_depth;
		2372	#endif
2100	}	2373	}
2101		2374
2102	void	2375	void
2103	ev_unloop (EV_P_ int how)	2376	ev_unloop (EV_P_ int how)
2104	{	2377	{
…		…
2135	ev_tstamp mn_prev = mn_now;	2408	ev_tstamp mn_prev = mn_now;
2136		2409
2137	ev_now_update (EV_A);	2410	ev_now_update (EV_A);
2138	timers_reschedule (EV_A_ mn_now - mn_prev);	2411	timers_reschedule (EV_A_ mn_now - mn_prev);
2139	#if EV_PERIODIC_ENABLE	2412	#if EV_PERIODIC_ENABLE
		2413	/* TODO: really do this? */
2140	periodics_reschedule (EV_A);	2414	periodics_reschedule (EV_A);
2141	#endif	2415	#endif
2142	}	2416	}
2143		2417
2144	/*****************************************************************************/	2418	/*****************************************************************************/
		2419	/* singly-linked list management, used when the expected list length is short */
2145		2420
2146	inline_size void	2421	inline_size void
2147	wlist_add (WL *head, WL elem)	2422	wlist_add (WL *head, WL elem)
2148	{	2423	{
2149	elem->next = *head;	2424	elem->next = *head;
…		…
2153	inline_size void	2428	inline_size void
2154	wlist_del (WL *head, WL elem)	2429	wlist_del (WL *head, WL elem)
2155	{	2430	{
2156	while (*head)	2431	while (*head)
2157	{	2432	{
2158	if (*head == elem)	2433	if (expect_true (*head == elem))
2159	{	2434	{
2160	*head = elem->next;	2435	*head = elem->next;
2161	return;	2436	break;
2162	}	2437	}
2163		2438
2164	head = &(*head)->next;	2439	head = &(*head)->next;
2165	}	2440	}
2166	}	2441	}
2167		2442
		2443	/* internal, faster, version of ev_clear_pending */
2168	inline_speed void	2444	inline_speed void
2169	clear_pending (EV_P_ W w)	2445	clear_pending (EV_P_ W w)
2170	{	2446	{
2171	if (w->pending)	2447	if (w->pending)
2172	{	2448	{
2173	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2449	pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2174	w->pending = 0;	2450	w->pending = 0;
2175	}	2451	}
2176	}	2452	}
2177		2453
2178	int	2454	int
…		…
2182	int pending = w_->pending;	2458	int pending = w_->pending;
2183		2459
2184	if (expect_true (pending))	2460	if (expect_true (pending))
2185	{	2461	{
2186	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;	2462	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2463	p->w = (W)&pending_w;
2187	w_->pending = 0;	2464	w_->pending = 0;
2188	p->w = 0;
2189	return p->events;	2465	return p->events;
2190	}	2466	}
2191	else	2467	else
2192	return 0;	2468	return 0;
2193	}	2469	}
2194		2470
2195	inline_size void	2471	inline_size void
2196	pri_adjust (EV_P_ W w)	2472	pri_adjust (EV_P_ W w)
2197	{	2473	{
2198	int pri = w->priority;	2474	int pri = ev_priority (w);
2199	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2475	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2200	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2476	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2201	w->priority = pri;	2477	ev_set_priority (w, pri);
2202	}	2478	}
2203		2479
2204	inline_speed void	2480	inline_speed void
2205	ev_start (EV_P_ W w, int active)	2481	ev_start (EV_P_ W w, int active)
2206	{	2482	{
…		…
2233		2509
2234	ev_start (EV_A_ (W)w, 1);	2510	ev_start (EV_A_ (W)w, 1);
2235	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2511	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2236	wlist_add (&anfds[fd].head, (WL)w);	2512	wlist_add (&anfds[fd].head, (WL)w);
2237		2513
2238	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);	2514	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2239	w->events &= ~EV__IOFDSET;	2515	w->events &= ~EV__IOFDSET;
2240		2516
2241	EV_FREQUENT_CHECK;	2517	EV_FREQUENT_CHECK;
2242	}	2518	}
2243		2519
…		…
2337	}	2613	}
2338		2614
2339	EV_FREQUENT_CHECK;	2615	EV_FREQUENT_CHECK;
2340	}	2616	}
2341		2617
		2618	ev_tstamp
		2619	ev_timer_remaining (EV_P_ ev_timer *w)
		2620	{
		2621	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2622	}
		2623
2342	#if EV_PERIODIC_ENABLE	2624	#if EV_PERIODIC_ENABLE
2343	void noinline	2625	void noinline
2344	ev_periodic_start (EV_P_ ev_periodic *w)	2626	ev_periodic_start (EV_P_ ev_periodic *w)
2345	{	2627	{
2346	if (expect_false (ev_is_active (w)))	2628	if (expect_false (ev_is_active (w)))
…		…
2413	#endif	2695	#endif
2414		2696
2415	void noinline	2697	void noinline
2416	ev_signal_start (EV_P_ ev_signal *w)	2698	ev_signal_start (EV_P_ ev_signal *w)
2417	{	2699	{
2418	#if EV_MULTIPLICITY
2419	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2420	#endif
2421	if (expect_false (ev_is_active (w)))	2700	if (expect_false (ev_is_active (w)))
2422	return;	2701	return;
2423		2702
2424	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));	2703	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2425		2704
2426	evpipe_init (EV_A);	2705	#if EV_MULTIPLICITY
		2706	assert (("libev: a signal must not be attached to two different loops",
		2707	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2427		2708
2428	EV_FREQUENT_CHECK;	2709	signals [w->signum - 1].loop = EV_A;
		2710	#endif
2429		2711
		2712	EV_FREQUENT_CHECK;
		2713
		2714	#if EV_USE_SIGNALFD
		2715	if (sigfd == -2)
2430	{	2716	{
2431	#ifndef _WIN32	2717	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2432	sigset_t full, prev;	2718	if (sigfd < 0 && errno == EINVAL)
2433	sigfillset (&full);	2719	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2434	sigprocmask (SIG_SETMASK, &full, &prev);
2435	#endif
2436		2720
2437	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);	2721	if (sigfd >= 0)
		2722	{
		2723	fd_intern (sigfd); /* doing it twice will not hurt */
2438		2724
2439	#ifndef _WIN32	2725	sigemptyset (&sigfd_set);
2440	sigprocmask (SIG_SETMASK, &prev, 0);	2726
2441	#endif	2727	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2728	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2729	ev_io_start (EV_A_ &sigfd_w);
		2730	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2731	}
2442	}	2732	}
		2733
		2734	if (sigfd >= 0)
		2735	{
		2736	/* TODO: check .head */
		2737	sigaddset (&sigfd_set, w->signum);
		2738	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2739
		2740	signalfd (sigfd, &sigfd_set, 0);
		2741	}
		2742	#endif
2443		2743
2444	ev_start (EV_A_ (W)w, 1);	2744	ev_start (EV_A_ (W)w, 1);
2445	wlist_add (&signals [w->signum - 1].head, (WL)w);	2745	wlist_add (&signals [w->signum - 1].head, (WL)w);
2446		2746
2447	if (!((WL)w)->next)	2747	if (!((WL)w)->next)
		2748	# if EV_USE_SIGNALFD
		2749	if (sigfd < 0) /*TODO*/
		2750	# endif
2448	{	2751	{
2449	#if _WIN32	2752	# if _WIN32
		2753	evpipe_init (EV_A);
		2754
2450	signal (w->signum, ev_sighandler);	2755	signal (w->signum, ev_sighandler);
2451	#else	2756	# else
2452	struct sigaction sa;	2757	struct sigaction sa;
		2758
		2759	evpipe_init (EV_A);
		2760
2453	sa.sa_handler = ev_sighandler;	2761	sa.sa_handler = ev_sighandler;
2454	sigfillset (&sa.sa_mask);	2762	sigfillset (&sa.sa_mask);
2455	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2763	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2456	sigaction (w->signum, &sa, 0);	2764	sigaction (w->signum, &sa, 0);
		2765
		2766	sigemptyset (&sa.sa_mask);
		2767	sigaddset (&sa.sa_mask, w->signum);
		2768	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2457	#endif	2769	#endif
2458	}	2770	}
2459		2771
2460	EV_FREQUENT_CHECK;	2772	EV_FREQUENT_CHECK;
2461	}	2773	}
2462		2774
2463	void noinline	2775	void noinline
…		…
2471		2783
2472	wlist_del (&signals [w->signum - 1].head, (WL)w);	2784	wlist_del (&signals [w->signum - 1].head, (WL)w);
2473	ev_stop (EV_A_ (W)w);	2785	ev_stop (EV_A_ (W)w);
2474		2786
2475	if (!signals [w->signum - 1].head)	2787	if (!signals [w->signum - 1].head)
		2788	{
		2789	#if EV_MULTIPLICITY
		2790	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2791	#endif
		2792	#if EV_USE_SIGNALFD
		2793	if (sigfd >= 0)
		2794	{
		2795	sigset_t ss;
		2796
		2797	sigemptyset (&ss);
		2798	sigaddset (&ss, w->signum);
		2799	sigdelset (&sigfd_set, w->signum);
		2800
		2801	signalfd (sigfd, &sigfd_set, 0);
		2802	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2803	}
		2804	else
		2805	#endif
2476	signal (w->signum, SIG_DFL);	2806	signal (w->signum, SIG_DFL);
		2807	}
2477		2808
2478	EV_FREQUENT_CHECK;	2809	EV_FREQUENT_CHECK;
2479	}	2810	}
2480		2811
2481	void	2812	void
…		…
2529	static void noinline	2860	static void noinline
2530	infy_add (EV_P_ ev_stat *w)	2861	infy_add (EV_P_ ev_stat *w)
2531	{	2862	{
2532	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);	2863	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2533		2864
2534	if (w->wd < 0)	2865	if (w->wd >= 0)
		2866	{
		2867	struct statfs sfs;
		2868
		2869	/* now local changes will be tracked by inotify, but remote changes won't */
		2870	/* unless the filesystem is known to be local, we therefore still poll */
		2871	/* also do poll on <2.6.25, but with normal frequency */
		2872
		2873	if (!fs_2625)
		2874	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2875	else if (!statfs (w->path, &sfs)
		2876	&& (sfs.f_type == 0x1373 /* devfs */
		2877	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2878	|| sfs.f_type == 0x3153464a /* jfs */
		2879	|| sfs.f_type == 0x52654973 /* reiser3 */
		2880	|| sfs.f_type == 0x01021994 /* tempfs */
		2881	|| sfs.f_type == 0x58465342 /* xfs */))
		2882	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		2883	else
		2884	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2535	{	2885	}
		2886	else
		2887	{
		2888	/* can't use inotify, continue to stat */
2536	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;	2889	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2537	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2538		2890
2539	/* monitor some parent directory for speedup hints */	2891	/* if path is not there, monitor some parent directory for speedup hints */
2540	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2892	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2541	/* but an efficiency issue only */	2893	/* but an efficiency issue only */
2542	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2894	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2543	{	2895	{
2544	char path [4096];	2896	char path [4096];
…		…
2560	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2912	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2561	}	2913	}
2562	}	2914	}
2563		2915
2564	if (w->wd >= 0)	2916	if (w->wd >= 0)
2565	{
2566	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2917	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2567		2918
2568	/* now local changes will be tracked by inotify, but remote changes won't */	2919	/* now re-arm timer, if required */
2569	/* unless the filesystem it known to be local, we therefore still poll */	2920	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2570	/* also do poll on <2.6.25, but with normal frequency */
2571	struct statfs sfs;
2572
2573	if (fs_2625 && !statfs (w->path, &sfs))
2574	if (sfs.f_type == 0x1373 /* devfs */
2575	|| sfs.f_type == 0xEF53 /* ext2/3 */
2576	|| sfs.f_type == 0x3153464a /* jfs */
2577	|| sfs.f_type == 0x52654973 /* reiser3 */
2578	|| sfs.f_type == 0x01021994 /* tempfs */
2579	|| sfs.f_type == 0x58465342 /* xfs */)
2580	return;
2581
2582	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2583	ev_timer_again (EV_A_ &w->timer);	2921	ev_timer_again (EV_A_ &w->timer);
2584	}	2922	if (ev_is_active (&w->timer)) ev_unref (EV_A);
2585	}	2923	}
2586		2924
2587	static void noinline	2925	static void noinline
2588	infy_del (EV_P_ ev_stat *w)	2926	infy_del (EV_P_ ev_stat *w)
2589	{	2927	{
…		…
2665	return;	3003	return;
2666		3004
2667	fs_2625 = 1;	3005	fs_2625 = 1;
2668	}	3006	}
2669		3007
		3008	inline_size int
		3009	infy_newfd (void)
		3010	{
		3011	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3012	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		3013	if (fd >= 0)
		3014	return fd;
		3015	#endif
		3016	return inotify_init ();
		3017	}
		3018
2670	inline_size void	3019	inline_size void
2671	infy_init (EV_P)	3020	infy_init (EV_P)
2672	{	3021	{
2673	if (fs_fd != -2)	3022	if (fs_fd != -2)
2674	return;	3023	return;
2675		3024
2676	fs_fd = -1;	3025	fs_fd = -1;
2677		3026
2678	check_2625 (EV_A);	3027	check_2625 (EV_A);
2679		3028
2680	fs_fd = inotify_init ();	3029	fs_fd = infy_newfd ();
2681		3030
2682	if (fs_fd >= 0)	3031	if (fs_fd >= 0)
2683	{	3032	{
		3033	fd_intern (fs_fd);
2684	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3034	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2685	ev_set_priority (&fs_w, EV_MAXPRI);	3035	ev_set_priority (&fs_w, EV_MAXPRI);
2686	ev_io_start (EV_A_ &fs_w);	3036	ev_io_start (EV_A_ &fs_w);
		3037	ev_unref (EV_A);
2687	}	3038	}
2688	}	3039	}
2689		3040
2690	inline_size void	3041	inline_size void
2691	infy_fork (EV_P)	3042	infy_fork (EV_P)
…		…
2693	int slot;	3044	int slot;
2694		3045
2695	if (fs_fd < 0)	3046	if (fs_fd < 0)
2696	return;	3047	return;
2697		3048
		3049	ev_ref (EV_A);
		3050	ev_io_stop (EV_A_ &fs_w);
2698	close (fs_fd);	3051	close (fs_fd);
2699	fs_fd = inotify_init ();	3052	fs_fd = infy_newfd ();
		3053
		3054	if (fs_fd >= 0)
		3055	{
		3056	fd_intern (fs_fd);
		3057	ev_io_set (&fs_w, fs_fd, EV_READ);
		3058	ev_io_start (EV_A_ &fs_w);
		3059	ev_unref (EV_A);
		3060	}
2700		3061
2701	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3062	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2702	{	3063	{
2703	WL w_ = fs_hash [slot].head;	3064	WL w_ = fs_hash [slot].head;
2704	fs_hash [slot].head = 0;	3065	fs_hash [slot].head = 0;
…		…
2711	w->wd = -1;	3072	w->wd = -1;
2712		3073
2713	if (fs_fd >= 0)	3074	if (fs_fd >= 0)
2714	infy_add (EV_A_ w); /* re-add, no matter what */	3075	infy_add (EV_A_ w); /* re-add, no matter what */
2715	else	3076	else
		3077	{
		3078	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3079	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2716	ev_timer_again (EV_A_ &w->timer);	3080	ev_timer_again (EV_A_ &w->timer);
		3081	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3082	}
2717	}	3083	}
2718	}	3084	}
2719	}	3085	}
2720		3086
2721	#endif	3087	#endif
…		…
2738	static void noinline	3104	static void noinline
2739	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3105	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2740	{	3106	{
2741	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));	3107	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2742		3108
2743	/* we copy this here each the time so that */	3109	ev_statdata prev = w->attr;
2744	/* prev has the old value when the callback gets invoked */
2745	w->prev = w->attr;
2746	ev_stat_stat (EV_A_ w);	3110	ev_stat_stat (EV_A_ w);
2747		3111
2748	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3112	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2749	if (	3113	if (
2750	w->prev.st_dev != w->attr.st_dev	3114	prev.st_dev != w->attr.st_dev
2751	|| w->prev.st_ino != w->attr.st_ino	3115	|| prev.st_ino != w->attr.st_ino
2752	|| w->prev.st_mode != w->attr.st_mode	3116	|| prev.st_mode != w->attr.st_mode
2753	|| w->prev.st_nlink != w->attr.st_nlink	3117	|| prev.st_nlink != w->attr.st_nlink
2754	|| w->prev.st_uid != w->attr.st_uid	3118	|| prev.st_uid != w->attr.st_uid
2755	|| w->prev.st_gid != w->attr.st_gid	3119	|| prev.st_gid != w->attr.st_gid
2756	|| w->prev.st_rdev != w->attr.st_rdev	3120	|| prev.st_rdev != w->attr.st_rdev
2757	|| w->prev.st_size != w->attr.st_size	3121	|| prev.st_size != w->attr.st_size
2758	|| w->prev.st_atime != w->attr.st_atime	3122	|| prev.st_atime != w->attr.st_atime
2759	|| w->prev.st_mtime != w->attr.st_mtime	3123	|| prev.st_mtime != w->attr.st_mtime
2760	|| w->prev.st_ctime != w->attr.st_ctime	3124	|| prev.st_ctime != w->attr.st_ctime
2761	) {	3125	) {
		3126	/* we only update w->prev on actual differences */
		3127	/* in case we test more often than invoke the callback, */
		3128	/* to ensure that prev is always different to attr */
		3129	w->prev = prev;
		3130
2762	#if EV_USE_INOTIFY	3131	#if EV_USE_INOTIFY
2763	if (fs_fd >= 0)	3132	if (fs_fd >= 0)
2764	{	3133	{
2765	infy_del (EV_A_ w);	3134	infy_del (EV_A_ w);
2766	infy_add (EV_A_ w);	3135	infy_add (EV_A_ w);
…		…
2791		3160
2792	if (fs_fd >= 0)	3161	if (fs_fd >= 0)
2793	infy_add (EV_A_ w);	3162	infy_add (EV_A_ w);
2794	else	3163	else
2795	#endif	3164	#endif
		3165	{
2796	ev_timer_again (EV_A_ &w->timer);	3166	ev_timer_again (EV_A_ &w->timer);
		3167	ev_unref (EV_A);
		3168	}
2797		3169
2798	ev_start (EV_A_ (W)w, 1);	3170	ev_start (EV_A_ (W)w, 1);
2799		3171
2800	EV_FREQUENT_CHECK;	3172	EV_FREQUENT_CHECK;
2801	}	3173	}
…		…
2810	EV_FREQUENT_CHECK;	3182	EV_FREQUENT_CHECK;
2811		3183
2812	#if EV_USE_INOTIFY	3184	#if EV_USE_INOTIFY
2813	infy_del (EV_A_ w);	3185	infy_del (EV_A_ w);
2814	#endif	3186	#endif
		3187
		3188	if (ev_is_active (&w->timer))
		3189	{
		3190	ev_ref (EV_A);
2815	ev_timer_stop (EV_A_ &w->timer);	3191	ev_timer_stop (EV_A_ &w->timer);
		3192	}
2816		3193
2817	ev_stop (EV_A_ (W)w);	3194	ev_stop (EV_A_ (W)w);
2818		3195
2819	EV_FREQUENT_CHECK;	3196	EV_FREQUENT_CHECK;
2820	}	3197	}
…		…
2961	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3338	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2962	{	3339	{
2963	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));	3340	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2964		3341
2965	{	3342	{
2966	struct ev_loop *loop = w->other;	3343	EV_P = w->other;
2967		3344
2968	while (fdchangecnt)	3345	while (fdchangecnt)
2969	{	3346	{
2970	fd_reify (EV_A);	3347	fd_reify (EV_A);
2971	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3348	ev_loop (EV_A_ EVLOOP_NONBLOCK);
…		…
2979	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3356	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2980		3357
2981	ev_embed_stop (EV_A_ w);	3358	ev_embed_stop (EV_A_ w);
2982		3359
2983	{	3360	{
2984	struct ev_loop *loop = w->other;	3361	EV_P = w->other;
2985		3362
2986	ev_loop_fork (EV_A);	3363	ev_loop_fork (EV_A);
2987	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3364	ev_loop (EV_A_ EVLOOP_NONBLOCK);
2988	}	3365	}
2989		3366
…		…
3003	{	3380	{
3004	if (expect_false (ev_is_active (w)))	3381	if (expect_false (ev_is_active (w)))
3005	return;	3382	return;
3006		3383
3007	{	3384	{
3008	struct ev_loop *loop = w->other;	3385	EV_P = w->other;
3009	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3386	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3010	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3387	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3011	}	3388	}
3012		3389
3013	EV_FREQUENT_CHECK;	3390	EV_FREQUENT_CHECK;
…		…
3125		3502
3126	void	3503	void
3127	ev_async_send (EV_P_ ev_async *w)	3504	ev_async_send (EV_P_ ev_async *w)
3128	{	3505	{
3129	w->sent = 1;	3506	w->sent = 1;
3130	evpipe_write (EV_A_ &gotasync);	3507	evpipe_write (EV_A_ &async_pending);
3131	}	3508	}
3132	#endif	3509	#endif
3133		3510
3134	/*****************************************************************************/	3511	/*****************************************************************************/
3135		3512
…		…
3199	}	3576	}
3200	}	3577	}
3201		3578
3202	/*****************************************************************************/	3579	/*****************************************************************************/
3203		3580
3204	#if 0	3581	#if EV_WALK_ENABLE
3205	void	3582	void
3206	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))	3583	ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3207	{	3584	{
3208	int i, j;	3585	int i, j;
3209	ev_watcher_list *wl, *wn;	3586	ev_watcher_list *wl, *wn;
…		…
3225	#if EV_USE_INOTIFY	3602	#if EV_USE_INOTIFY
3226	if (ev_cb ((ev_io *)wl) == infy_cb)	3603	if (ev_cb ((ev_io *)wl) == infy_cb)
3227	;	3604	;
3228	else	3605	else
3229	#endif	3606	#endif
3230	if ((ev_io *)wl != &pipeev)	3607	if ((ev_io *)wl != &pipe_w)
3231	if (types & EV_IO)	3608	if (types & EV_IO)
3232	cb (EV_A_ EV_IO, wl);	3609	cb (EV_A_ EV_IO, wl);
3233		3610
3234	wl = wn;	3611	wl = wn;
3235	}	3612	}
…		…
3284	if (types & EV_CHECK)	3661	if (types & EV_CHECK)
3285	for (i = checkcnt; i--; )	3662	for (i = checkcnt; i--; )
3286	cb (EV_A_ EV_CHECK, checks [i]);	3663	cb (EV_A_ EV_CHECK, checks [i]);
3287		3664
3288	if (types & EV_SIGNAL)	3665	if (types & EV_SIGNAL)
3289	for (i = 0; i < signalmax; ++i)	3666	for (i = 0; i < EV_NSIG - 1; ++i)
3290	for (wl = signals [i].head; wl; )	3667	for (wl = signals [i].head; wl; )
3291	{	3668	{
3292	wn = wl->next;	3669	wn = wl->next;
3293	cb (EV_A_ EV_SIGNAL, wl);	3670	cb (EV_A_ EV_SIGNAL, wl);
3294	wl = wn;	3671	wl = wn;

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines