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Comparing libev/ev.c (file contents):
Revision 1.288 by root, Sat Apr 25 14:12:48 2009 UTC vs.
Revision 1.330 by root, Tue Mar 9 08:46:17 2010 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without modifica-	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:	8	* tion, are permitted provided that the following conditions are met:
9	*	9	*
…		…
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
…		…
108	# define EV_USE_EPOLL 0	110	# define EV_USE_EPOLL 0
109	# endif	111	# endif
110	# endif	112	# endif
111		113
112	# ifndef EV_USE_KQUEUE	114	# ifndef EV_USE_KQUEUE
113	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	115	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
114	# define EV_USE_KQUEUE 1	116	# define EV_USE_KQUEUE 1
115	# else	117	# else
116	# define EV_USE_KQUEUE 0	118	# define EV_USE_KQUEUE 0
117	# endif	119	# endif
118	# endif	120	# endif
…		…
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
153	#include <assert.h>	164	#include <assert.h>
154	#include <errno.h>	165	#include <errno.h>
155	#include <sys/types.h>	166	#include <sys/types.h>
156	#include <time.h>	167	#include <time.h>
		168	#include <limits.h>
157		169
158	#include <signal.h>	170	#include <signal.h>
159		171
160	#ifdef EV_H	172	#ifdef EV_H
161	# include EV_H	173	# include EV_H
…		…
176	# endif	188	# endif
177	#endif	189	#endif
178		190
179	/* this block tries to deduce configuration from header-defined symbols and defaults */	191	/* this block tries to deduce configuration from header-defined symbols and defaults */
180		192
		193	/* try to deduce the maximum number of signals on this platform */
		194	#if defined (EV_NSIG)
		195	/* use what's provided */
		196	#elif defined (NSIG)
		197	# define EV_NSIG (NSIG)
		198	#elif defined(_NSIG)
		199	# define EV_NSIG (_NSIG)
		200	#elif defined (SIGMAX)
		201	# define EV_NSIG (SIGMAX+1)
		202	#elif defined (SIG_MAX)
		203	# define EV_NSIG (SIG_MAX+1)
		204	#elif defined (_SIG_MAX)
		205	# define EV_NSIG (_SIG_MAX+1)
		206	#elif defined (MAXSIG)
		207	# define EV_NSIG (MAXSIG+1)
		208	#elif defined (MAX_SIG)
		209	# define EV_NSIG (MAX_SIG+1)
		210	#elif defined (SIGARRAYSIZE)
		211	# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
		212	#elif defined (_sys_nsig)
		213	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		214	#else
		215	# error "unable to find value for NSIG, please report"
		216	/* to make it compile regardless, just remove the above line */
		217	# define EV_NSIG 65
		218	#endif
		219
181	#ifndef EV_USE_CLOCK_SYSCALL	220	#ifndef EV_USE_CLOCK_SYSCALL
182	# if __linux && __GLIBC__ >= 2	221	# if __linux && __GLIBC__ >= 2
183	# define EV_USE_CLOCK_SYSCALL 1	222	# define EV_USE_CLOCK_SYSCALL 1
184	# else	223	# else
185	# define EV_USE_CLOCK_SYSCALL 0	224	# define EV_USE_CLOCK_SYSCALL 0
…		…
264	# else	303	# else
265	# define EV_USE_EVENTFD 0	304	# define EV_USE_EVENTFD 0
266	# endif	305	# endif
267	#endif	306	#endif
268		307
		308	#ifndef EV_USE_SIGNALFD
		309	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		310	# define EV_USE_SIGNALFD 1
		311	# else
		312	# define EV_USE_SIGNALFD 0
		313	# endif
		314	#endif
		315
269	#if 0 /* debugging */	316	#if 0 /* debugging */
270	# define EV_VERIFY 3	317	# define EV_VERIFY 3
271	# define EV_USE_4HEAP 1	318	# define EV_USE_4HEAP 1
272	# define EV_HEAP_CACHE_AT 1	319	# define EV_HEAP_CACHE_AT 1
273	#endif	320	#endif
…		…
282		329
283	#ifndef EV_HEAP_CACHE_AT	330	#ifndef EV_HEAP_CACHE_AT
284	# define EV_HEAP_CACHE_AT !EV_MINIMAL	331	# define EV_HEAP_CACHE_AT !EV_MINIMAL
285	#endif	332	#endif
286		333
		334	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		335	/* which makes programs even slower. might work on other unices, too. */
		336	#if EV_USE_CLOCK_SYSCALL
		337	# include <syscall.h>
		338	# ifdef SYS_clock_gettime
		339	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		340	# undef EV_USE_MONOTONIC
		341	# define EV_USE_MONOTONIC 1
		342	# else
		343	# undef EV_USE_CLOCK_SYSCALL
		344	# define EV_USE_CLOCK_SYSCALL 0
		345	# endif
		346	#endif
		347
287	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	348	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		349
		350	#ifdef _AIX
		351	/* AIX has a completely broken poll.h header */
		352	# undef EV_USE_POLL
		353	# define EV_USE_POLL 0
		354	#endif
288		355
289	#ifndef CLOCK_MONOTONIC	356	#ifndef CLOCK_MONOTONIC
290	# undef EV_USE_MONOTONIC	357	# undef EV_USE_MONOTONIC
291	# define EV_USE_MONOTONIC 0	358	# define EV_USE_MONOTONIC 0
292	#endif	359	#endif
…		…
320		387
321	#if EV_SELECT_IS_WINSOCKET	388	#if EV_SELECT_IS_WINSOCKET
322	# include <winsock.h>	389	# include <winsock.h>
323	#endif	390	#endif
324		391
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	392	#if EV_USE_EVENTFD
335	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	393	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336	# include <stdint.h>	394	# include <stdint.h>
		395	# ifndef EFD_NONBLOCK
		396	# define EFD_NONBLOCK O_NONBLOCK
		397	# endif
		398	# ifndef EFD_CLOEXEC
		399	# ifdef O_CLOEXEC
		400	# define EFD_CLOEXEC O_CLOEXEC
		401	# else
		402	# define EFD_CLOEXEC 02000000
		403	# endif
		404	# endif
337	# ifdef __cplusplus	405	# ifdef __cplusplus
338	extern "C" {	406	extern "C" {
339	# endif	407	# endif
340	int eventfd (unsigned int initval, int flags);	408	int (eventfd) (unsigned int initval, int flags);
341	# ifdef __cplusplus	409	# ifdef __cplusplus
342	}	410	}
343	# endif	411	# endif
344	#endif	412	#endif
		413
		414	#if EV_USE_SIGNALFD
		415	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		416	# include <stdint.h>
		417	# ifndef SFD_NONBLOCK
		418	# define SFD_NONBLOCK O_NONBLOCK
		419	# endif
		420	# ifndef SFD_CLOEXEC
		421	# ifdef O_CLOEXEC
		422	# define SFD_CLOEXEC O_CLOEXEC
		423	# else
		424	# define SFD_CLOEXEC 02000000
		425	# endif
		426	# endif
		427	# ifdef __cplusplus
		428	extern "C" {
		429	# endif
		430	int signalfd (int fd, const sigset_t *mask, int flags);
		431
		432	struct signalfd_siginfo
		433	{
		434	uint32_t ssi_signo;
		435	char pad[128 - sizeof (uint32_t)];
		436	};
		437	# ifdef __cplusplus
		438	}
		439	# endif
		440	#endif
		441
345		442
346	/**/	443	/**/
347		444
348	#if EV_VERIFY >= 3	445	#if EV_VERIFY >= 3
349	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	446	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
…		…
361	*/	458	*/
362	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	459	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
363		460
364	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	461	#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) */	462	#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		463
368	#if __GNUC__ >= 4	464	#if __GNUC__ >= 4
369	# define expect(expr,value) __builtin_expect ((expr),(value))	465	# define expect(expr,value) __builtin_expect ((expr),(value))
370	# define noinline __attribute__ ((noinline))	466	# define noinline __attribute__ ((noinline))
371	#else	467	#else
…		…
384	# define inline_speed static noinline	480	# define inline_speed static noinline
385	#else	481	#else
386	# define inline_speed static inline	482	# define inline_speed static inline
387	#endif	483	#endif
388		484
389	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	485	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		486
		487	#if EV_MINPRI == EV_MAXPRI
		488	# define ABSPRI(w) (((W)w), 0)
		489	#else
390	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	490	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		491	#endif
391		492
392	#define EMPTY /* required for microsofts broken pseudo-c compiler */	493	#define EMPTY /* required for microsofts broken pseudo-c compiler */
393	#define EMPTY2(a,b) /* used to suppress some warnings */	494	#define EMPTY2(a,b) /* used to suppress some warnings */
394		495
395	typedef ev_watcher *W;	496	typedef ev_watcher *W;
…		…
407		508
408	#if EV_USE_MONOTONIC	509	#if EV_USE_MONOTONIC
409	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	510	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410	#endif	511	#endif
411		512
		513	#ifndef EV_FD_TO_WIN32_HANDLE
		514	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		515	#endif
		516	#ifndef EV_WIN32_HANDLE_TO_FD
		517	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		518	#endif
		519	#ifndef EV_WIN32_CLOSE_FD
		520	# define EV_WIN32_CLOSE_FD(fd) close (fd)
		521	#endif
		522
412	#ifdef _WIN32	523	#ifdef _WIN32
413	# include "ev_win32.c"	524	# include "ev_win32.c"
414	#endif	525	#endif
415		526
416	/*****************************************************************************/	527	/*****************************************************************************/
…		…
431		542
432	if (syserr_cb)	543	if (syserr_cb)
433	syserr_cb (msg);	544	syserr_cb (msg);
434	else	545	else
435	{	546	{
		547	#if EV_AVOID_STDIO
		548	write (STDERR_FILENO, msg, strlen (msg));
		549	write (STDERR_FILENO, ": ", 2);
		550	msg = strerror (errno);
		551	write (STDERR_FILENO, msg, strlen (msg));
		552	write (STDERR_FILENO, "\n", 1);
		553	#else
436	perror (msg);	554	perror (msg);
		555	#endif
437	abort ();	556	abort ();
438	}	557	}
439	}	558	}
440		559
441	static void *	560	static void *
…		…
466	{	585	{
467	ptr = alloc (ptr, size);	586	ptr = alloc (ptr, size);
468		587
469	if (!ptr && size)	588	if (!ptr && size)
470	{	589	{
		590	#if EV_AVOID_STDIO
		591	write (STDERR_FILENO, "libev: memory allocation failed, aborting.",
		592	sizeof ("libev: memory allocation failed, aborting.") - 1);
		593	#else
471	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	594	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		595	#endif
472	abort ();	596	abort ();
473	}	597	}
474		598
475	return ptr;	599	return ptr;
476	}	600	}
…		…
478	#define ev_malloc(size) ev_realloc (0, (size))	602	#define ev_malloc(size) ev_realloc (0, (size))
479	#define ev_free(ptr) ev_realloc ((ptr), 0)	603	#define ev_free(ptr) ev_realloc ((ptr), 0)
480		604
481	/*****************************************************************************/	605	/*****************************************************************************/
482		606
		607	/* set in reify when reification needed */
		608	#define EV_ANFD_REIFY 1
		609
483	/* file descriptor info structure */	610	/* file descriptor info structure */
484	typedef struct	611	typedef struct
485	{	612	{
486	WL head;	613	WL head;
487	unsigned char events; /* the events watched for */	614	unsigned char events; /* the events watched for */
488	unsigned char reify; /* flag set when this ANFD needs reification */	615	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
489	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	616	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
490	unsigned char unused;	617	unsigned char unused;
491	#if EV_USE_EPOLL	618	#if EV_USE_EPOLL
492	unsigned int egen; /* generation counter to counter epoll bugs */	619	unsigned int egen; /* generation counter to counter epoll bugs */
493	#endif	620	#endif
…		…
555		682
556	static int ev_default_loop_ptr;	683	static int ev_default_loop_ptr;
557		684
558	#endif	685	#endif
559		686
		687	#if EV_MINIMAL < 2
		688	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		689	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		690	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		691	#else
		692	# define EV_RELEASE_CB (void)0
		693	# define EV_ACQUIRE_CB (void)0
		694	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		695	#endif
		696
		697	#define EVUNLOOP_RECURSE 0x80
		698
560	/*****************************************************************************/	699	/*****************************************************************************/
561		700
		701	#ifndef EV_HAVE_EV_TIME
562	ev_tstamp	702	ev_tstamp
563	ev_time (void)	703	ev_time (void)
564	{	704	{
565	#if EV_USE_REALTIME	705	#if EV_USE_REALTIME
566	if (expect_true (have_realtime))	706	if (expect_true (have_realtime))
…		…
573		713
574	struct timeval tv;	714	struct timeval tv;
575	gettimeofday (&tv, 0);	715	gettimeofday (&tv, 0);
576	return tv.tv_sec + tv.tv_usec * 1e-6;	716	return tv.tv_sec + tv.tv_usec * 1e-6;
577	}	717	}
		718	#endif
578		719
579	inline_size ev_tstamp	720	inline_size ev_tstamp
580	get_clock (void)	721	get_clock (void)
581	{	722	{
582	#if EV_USE_MONOTONIC	723	#if EV_USE_MONOTONIC
…		…
618		759
619	tv.tv_sec = (time_t)delay;	760	tv.tv_sec = (time_t)delay;
620	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	761	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
621		762
622	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	763	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
623	/* somehting nto guaranteed by newer posix versions, but guaranteed */	764	/* something not guaranteed by newer posix versions, but guaranteed */
624	/* by older ones */	765	/* by older ones */
625	select (0, 0, 0, 0, &tv);	766	select (0, 0, 0, 0, &tv);
626	#endif	767	#endif
627	}	768	}
628	}	769	}
…		…
736	}	877	}
737		878
738	/*****************************************************************************/	879	/*****************************************************************************/
739		880
740	inline_speed void	881	inline_speed void
741	fd_event (EV_P_ int fd, int revents)	882	fd_event_nc (EV_P_ int fd, int revents)
742	{	883	{
743	ANFD *anfd = anfds + fd;	884	ANFD *anfd = anfds + fd;
744	ev_io *w;	885	ev_io *w;
745		886
746	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	887	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
750	if (ev)	891	if (ev)
751	ev_feed_event (EV_A_ (W)w, ev);	892	ev_feed_event (EV_A_ (W)w, ev);
752	}	893	}
753	}	894	}
754		895
		896	/* do not submit kernel events for fds that have reify set */
		897	/* because that means they changed while we were polling for new events */
		898	inline_speed void
		899	fd_event (EV_P_ int fd, int revents)
		900	{
		901	ANFD *anfd = anfds + fd;
		902
		903	if (expect_true (!anfd->reify))
		904	fd_event_nc (EV_A_ fd, revents);
		905	}
		906
755	void	907	void
756	ev_feed_fd_event (EV_P_ int fd, int revents)	908	ev_feed_fd_event (EV_P_ int fd, int revents)
757	{	909	{
758	if (fd >= 0 && fd < anfdmax)	910	if (fd >= 0 && fd < anfdmax)
759	fd_event (EV_A_ fd, revents);	911	fd_event_nc (EV_A_ fd, revents);
760	}	912	}
761		913
762	/* make sure the external fd watch events are in-sync */	914	/* make sure the external fd watch events are in-sync */
763	/* with the kernel/libev internal state */	915	/* with the kernel/libev internal state */
764	inline_size void	916	inline_size void
…		…
779		931
780	#if EV_SELECT_IS_WINSOCKET	932	#if EV_SELECT_IS_WINSOCKET
781	if (events)	933	if (events)
782	{	934	{
783	unsigned long arg;	935	unsigned long arg;
784	#ifdef EV_FD_TO_WIN32_HANDLE
785	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	936	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
786	#else
787	anfd->handle = _get_osfhandle (fd);
788	#endif
789	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	937	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
790	}	938	}
791	#endif	939	#endif
792		940
793	{	941	{
…		…
836	/* check whether the given fd is atcually valid, for error recovery */	984	/* check whether the given fd is atcually valid, for error recovery */
837	inline_size int	985	inline_size int
838	fd_valid (int fd)	986	fd_valid (int fd)
839	{	987	{
840	#ifdef _WIN32	988	#ifdef _WIN32
841	return _get_osfhandle (fd) != -1;	989	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
842	#else	990	#else
843	return fcntl (fd, F_GETFD) != -1;	991	return fcntl (fd, F_GETFD) != -1;
844	#endif	992	#endif
845	}	993	}
846		994
…		…
864		1012
865	for (fd = anfdmax; fd--; )	1013	for (fd = anfdmax; fd--; )
866	if (anfds [fd].events)	1014	if (anfds [fd].events)
867	{	1015	{
868	fd_kill (EV_A_ fd);	1016	fd_kill (EV_A_ fd);
869	return;	1017	break;
870	}	1018	}
871	}	1019	}
872		1020
873	/* usually called after fork if backend needs to re-arm all fds from scratch */	1021	/* usually called after fork if backend needs to re-arm all fds from scratch */
874	static void noinline	1022	static void noinline
…		…
879	for (fd = 0; fd < anfdmax; ++fd)	1027	for (fd = 0; fd < anfdmax; ++fd)
880	if (anfds [fd].events)	1028	if (anfds [fd].events)
881	{	1029	{
882	anfds [fd].events = 0;	1030	anfds [fd].events = 0;
883	anfds [fd].emask = 0;	1031	anfds [fd].emask = 0;
884	fd_change (EV_A_ fd, EV__IOFDSET | 1);	1032	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
885	}	1033	}
886	}	1034	}
887		1035
888	/*****************************************************************************/	1036	/*****************************************************************************/
889		1037
…		…
964		1112
965	for (;;)	1113	for (;;)
966	{	1114	{
967	int c = k << 1;	1115	int c = k << 1;
968		1116
969	if (c > N + HEAP0 - 1)	1117	if (c >= N + HEAP0)
970	break;	1118	break;
971		1119
972	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])	1120	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
973	? 1 : 0;	1121	? 1 : 0;
974		1122
…		…
1010		1158
1011	/* move an element suitably so it is in a correct place */	1159	/* move an element suitably so it is in a correct place */
1012	inline_size void	1160	inline_size void
1013	adjustheap (ANHE *heap, int N, int k)	1161	adjustheap (ANHE *heap, int N, int k)
1014	{	1162	{
1015	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1163	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1016	upheap (heap, k);	1164	upheap (heap, k);
1017	else	1165	else
1018	downheap (heap, N, k);	1166	downheap (heap, N, k);
1019	}	1167	}
1020		1168
…		…
1033	/*****************************************************************************/	1181	/*****************************************************************************/
1034		1182
1035	/* associate signal watchers to a signal signal */	1183	/* associate signal watchers to a signal signal */
1036	typedef struct	1184	typedef struct
1037	{	1185	{
		1186	EV_ATOMIC_T pending;
		1187	#if EV_MULTIPLICITY
		1188	EV_P;
		1189	#endif
1038	WL head;	1190	WL head;
1039	EV_ATOMIC_T gotsig;
1040	} ANSIG;	1191	} ANSIG;
1041		1192
1042	static ANSIG *signals;	1193	static ANSIG signals [EV_NSIG - 1];
1043	static int signalmax;
1044
1045	static EV_ATOMIC_T gotsig;
1046		1194
1047	/*****************************************************************************/	1195	/*****************************************************************************/
1048		1196
1049	/* used to prepare libev internal fd's */	1197	/* used to prepare libev internal fd's */
1050	/* this is not fork-safe */	1198	/* this is not fork-safe */
1051	inline_speed void	1199	inline_speed void
1052	fd_intern (int fd)	1200	fd_intern (int fd)
1053	{	1201	{
1054	#ifdef _WIN32	1202	#ifdef _WIN32
1055	unsigned long arg = 1;	1203	unsigned long arg = 1;
1056	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1204	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1057	#else	1205	#else
1058	fcntl (fd, F_SETFD, FD_CLOEXEC);	1206	fcntl (fd, F_SETFD, FD_CLOEXEC);
1059	fcntl (fd, F_SETFL, O_NONBLOCK);	1207	fcntl (fd, F_SETFL, O_NONBLOCK);
1060	#endif	1208	#endif
1061	}	1209	}
…		…
1064	evpipe_init (EV_P)	1212	evpipe_init (EV_P)
1065	{	1213	{
1066	if (!ev_is_active (&pipe_w))	1214	if (!ev_is_active (&pipe_w))
1067	{	1215	{
1068	#if EV_USE_EVENTFD	1216	#if EV_USE_EVENTFD
		1217	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1218	if (evfd < 0 && errno == EINVAL)
1069	if ((evfd = eventfd (0, 0)) >= 0)	1219	evfd = eventfd (0, 0);
		1220
		1221	if (evfd >= 0)
1070	{	1222	{
1071	evpipe [0] = -1;	1223	evpipe [0] = -1;
1072	fd_intern (evfd);	1224	fd_intern (evfd); /* doing it twice doesn't hurt */
1073	ev_io_set (&pipe_w, evfd, EV_READ);	1225	ev_io_set (&pipe_w, evfd, EV_READ);
1074	}	1226	}
1075	else	1227	else
1076	#endif	1228	#endif
1077	{	1229	{
…		…
1114	/* called whenever the libev signal pipe */	1266	/* called whenever the libev signal pipe */
1115	/* got some events (signal, async) */	1267	/* got some events (signal, async) */
1116	static void	1268	static void
1117	pipecb (EV_P_ ev_io *iow, int revents)	1269	pipecb (EV_P_ ev_io *iow, int revents)
1118	{	1270	{
		1271	int i;
		1272
1119	#if EV_USE_EVENTFD	1273	#if EV_USE_EVENTFD
1120	if (evfd >= 0)	1274	if (evfd >= 0)
1121	{	1275	{
1122	uint64_t counter;	1276	uint64_t counter;
1123	read (evfd, &counter, sizeof (uint64_t));	1277	read (evfd, &counter, sizeof (uint64_t));
…		…
1127	{	1281	{
1128	char dummy;	1282	char dummy;
1129	read (evpipe [0], &dummy, 1);	1283	read (evpipe [0], &dummy, 1);
1130	}	1284	}
1131		1285
1132	if (gotsig && ev_is_default_loop (EV_A))	1286	if (sig_pending)
1133	{	1287	{
1134	int signum;	1288	sig_pending = 0;
1135	gotsig = 0;
1136		1289
1137	for (signum = signalmax; signum--; )	1290	for (i = EV_NSIG - 1; i--; )
1138	if (signals [signum].gotsig)	1291	if (expect_false (signals [i].pending))
1139	ev_feed_signal_event (EV_A_ signum + 1);	1292	ev_feed_signal_event (EV_A_ i + 1);
1140	}	1293	}
1141		1294
1142	#if EV_ASYNC_ENABLE	1295	#if EV_ASYNC_ENABLE
1143	if (gotasync)	1296	if (async_pending)
1144	{	1297	{
1145	int i;	1298	async_pending = 0;
1146	gotasync = 0;
1147		1299
1148	for (i = asynccnt; i--; )	1300	for (i = asynccnt; i--; )
1149	if (asyncs [i]->sent)	1301	if (asyncs [i]->sent)
1150	{	1302	{
1151	asyncs [i]->sent = 0;	1303	asyncs [i]->sent = 0;
…		…
1159		1311
1160	static void	1312	static void
1161	ev_sighandler (int signum)	1313	ev_sighandler (int signum)
1162	{	1314	{
1163	#if EV_MULTIPLICITY	1315	#if EV_MULTIPLICITY
1164	struct ev_loop *loop = &default_loop_struct;	1316	EV_P = signals [signum - 1].loop;
1165	#endif	1317	#endif
1166		1318
1167	#if _WIN32	1319	#ifdef _WIN32
1168	signal (signum, ev_sighandler);	1320	signal (signum, ev_sighandler);
1169	#endif	1321	#endif
1170		1322
1171	signals [signum - 1].gotsig = 1;	1323	signals [signum - 1].pending = 1;
1172	evpipe_write (EV_A_ &gotsig);	1324	evpipe_write (EV_A_ &sig_pending);
1173	}	1325	}
1174		1326
1175	void noinline	1327	void noinline
1176	ev_feed_signal_event (EV_P_ int signum)	1328	ev_feed_signal_event (EV_P_ int signum)
1177	{	1329	{
1178	WL w;	1330	WL w;
1179		1331
		1332	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1333	return;
		1334
		1335	--signum;
		1336
1180	#if EV_MULTIPLICITY	1337	#if EV_MULTIPLICITY
1181	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1338	/* it is permissible to try to feed a signal to the wrong loop */
1182	#endif	1339	/* or, likely more useful, feeding a signal nobody is waiting for */
1183		1340
1184	--signum;	1341	if (expect_false (signals [signum].loop != EV_A))
1185
1186	if (signum < 0 || signum >= signalmax)
1187	return;	1342	return;
		1343	#endif
1188		1344
1189	signals [signum].gotsig = 0;	1345	signals [signum].pending = 0;
1190		1346
1191	for (w = signals [signum].head; w; w = w->next)	1347	for (w = signals [signum].head; w; w = w->next)
1192	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1348	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1193	}	1349	}
		1350
		1351	#if EV_USE_SIGNALFD
		1352	static void
		1353	sigfdcb (EV_P_ ev_io *iow, int revents)
		1354	{
		1355	struct signalfd_siginfo si[2], *sip; /* these structs are big */
		1356
		1357	for (;;)
		1358	{
		1359	ssize_t res = read (sigfd, si, sizeof (si));
		1360
		1361	/* not ISO-C, as res might be -1, but works with SuS */
		1362	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		1363	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1364
		1365	if (res < (ssize_t)sizeof (si))
		1366	break;
		1367	}
		1368	}
		1369	#endif
1194		1370
1195	/*****************************************************************************/	1371	/*****************************************************************************/
1196		1372
1197	static WL childs [EV_PID_HASHSIZE];	1373	static WL childs [EV_PID_HASHSIZE];
1198		1374
…		…
1343	ev_backend (EV_P)	1519	ev_backend (EV_P)
1344	{	1520	{
1345	return backend;	1521	return backend;
1346	}	1522	}
1347		1523
		1524	#if EV_MINIMAL < 2
1348	unsigned int	1525	unsigned int
1349	ev_loop_count (EV_P)	1526	ev_loop_count (EV_P)
1350	{	1527	{
1351	return loop_count;	1528	return loop_count;
1352	}	1529	}
1353		1530
		1531	unsigned int
		1532	ev_loop_depth (EV_P)
		1533	{
		1534	return loop_depth;
		1535	}
		1536
1354	void	1537	void
1355	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1538	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1356	{	1539	{
1357	io_blocktime = interval;	1540	io_blocktime = interval;
1358	}	1541	}
…		…
1360	void	1543	void
1361	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1544	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1362	{	1545	{
1363	timeout_blocktime = interval;	1546	timeout_blocktime = interval;
1364	}	1547	}
		1548
		1549	void
		1550	ev_set_userdata (EV_P_ void *data)
		1551	{
		1552	userdata = data;
		1553	}
		1554
		1555	void *
		1556	ev_userdata (EV_P)
		1557	{
		1558	return userdata;
		1559	}
		1560
		1561	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1562	{
		1563	invoke_cb = invoke_pending_cb;
		1564	}
		1565
		1566	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1567	{
		1568	release_cb = release;
		1569	acquire_cb = acquire;
		1570	}
		1571	#endif
1365		1572
1366	/* initialise a loop structure, must be zero-initialised */	1573	/* initialise a loop structure, must be zero-initialised */
1367	static void noinline	1574	static void noinline
1368	loop_init (EV_P_ unsigned int flags)	1575	loop_init (EV_P_ unsigned int flags)
1369	{	1576	{
…		…
1387	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1594	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1388	have_monotonic = 1;	1595	have_monotonic = 1;
1389	}	1596	}
1390	#endif	1597	#endif
1391		1598
		1599	/* pid check not overridable via env */
		1600	#ifndef _WIN32
		1601	if (flags & EVFLAG_FORKCHECK)
		1602	curpid = getpid ();
		1603	#endif
		1604
		1605	if (!(flags & EVFLAG_NOENV)
		1606	&& !enable_secure ()
		1607	&& getenv ("LIBEV_FLAGS"))
		1608	flags = atoi (getenv ("LIBEV_FLAGS"));
		1609
1392	ev_rt_now = ev_time ();	1610	ev_rt_now = ev_time ();
1393	mn_now = get_clock ();	1611	mn_now = get_clock ();
1394	now_floor = mn_now;	1612	now_floor = mn_now;
1395	rtmn_diff = ev_rt_now - mn_now;	1613	rtmn_diff = ev_rt_now - mn_now;
		1614	#if EV_MINIMAL < 2
		1615	invoke_cb = ev_invoke_pending;
		1616	#endif
1396		1617
1397	io_blocktime = 0.;	1618	io_blocktime = 0.;
1398	timeout_blocktime = 0.;	1619	timeout_blocktime = 0.;
1399	backend = 0;	1620	backend = 0;
1400	backend_fd = -1;	1621	backend_fd = -1;
1401	gotasync = 0;	1622	sig_pending = 0;
		1623	#if EV_ASYNC_ENABLE
		1624	async_pending = 0;
		1625	#endif
1402	#if EV_USE_INOTIFY	1626	#if EV_USE_INOTIFY
1403	fs_fd = -2;	1627	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1404	#endif	1628	#endif
1405		1629	#if EV_USE_SIGNALFD
1406	/* pid check not overridable via env */	1630	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1407	#ifndef _WIN32
1408	if (flags & EVFLAG_FORKCHECK)
1409	curpid = getpid ();
1410	#endif	1631	#endif
1411
1412	if (!(flags & EVFLAG_NOENV)
1413	&& !enable_secure ()
1414	&& getenv ("LIBEV_FLAGS"))
1415	flags = atoi (getenv ("LIBEV_FLAGS"));
1416		1632
1417	if (!(flags & 0x0000ffffU))	1633	if (!(flags & 0x0000ffffU))
1418	flags |= ev_recommended_backends ();	1634	flags |= ev_recommended_backends ();
1419		1635
1420	#if EV_USE_PORT	1636	#if EV_USE_PORT
…		…
1446	{	1662	{
1447	int i;	1663	int i;
1448		1664
1449	if (ev_is_active (&pipe_w))	1665	if (ev_is_active (&pipe_w))
1450	{	1666	{
1451	ev_ref (EV_A); /* signal watcher */	1667	/*ev_ref (EV_A);*/
1452	ev_io_stop (EV_A_ &pipe_w);	1668	/*ev_io_stop (EV_A_ &pipe_w);*/
1453		1669
1454	#if EV_USE_EVENTFD	1670	#if EV_USE_EVENTFD
1455	if (evfd >= 0)	1671	if (evfd >= 0)
1456	close (evfd);	1672	close (evfd);
1457	#endif	1673	#endif
1458		1674
1459	if (evpipe [0] >= 0)	1675	if (evpipe [0] >= 0)
1460	{	1676	{
1461	close (evpipe [0]);	1677	EV_WIN32_CLOSE_FD (evpipe [0]);
1462	close (evpipe [1]);	1678	EV_WIN32_CLOSE_FD (evpipe [1]);
1463	}	1679	}
1464	}	1680	}
		1681
		1682	#if EV_USE_SIGNALFD
		1683	if (ev_is_active (&sigfd_w))
		1684	close (sigfd);
		1685	#endif
1465		1686
1466	#if EV_USE_INOTIFY	1687	#if EV_USE_INOTIFY
1467	if (fs_fd >= 0)	1688	if (fs_fd >= 0)
1468	close (fs_fd);	1689	close (fs_fd);
1469	#endif	1690	#endif
…		…
1493	#if EV_IDLE_ENABLE	1714	#if EV_IDLE_ENABLE
1494	array_free (idle, [i]);	1715	array_free (idle, [i]);
1495	#endif	1716	#endif
1496	}	1717	}
1497		1718
1498	ev_free (anfds); anfdmax = 0;	1719	ev_free (anfds); anfds = 0; anfdmax = 0;
1499		1720
1500	/* have to use the microsoft-never-gets-it-right macro */	1721	/* have to use the microsoft-never-gets-it-right macro */
1501	array_free (rfeed, EMPTY);	1722	array_free (rfeed, EMPTY);
1502	array_free (fdchange, EMPTY);	1723	array_free (fdchange, EMPTY);
1503	array_free (timer, EMPTY);	1724	array_free (timer, EMPTY);
…		…
1538		1759
1539	if (ev_is_active (&pipe_w))	1760	if (ev_is_active (&pipe_w))
1540	{	1761	{
1541	/* this "locks" the handlers against writing to the pipe */	1762	/* this "locks" the handlers against writing to the pipe */
1542	/* while we modify the fd vars */	1763	/* while we modify the fd vars */
1543	gotsig = 1;	1764	sig_pending = 1;
1544	#if EV_ASYNC_ENABLE	1765	#if EV_ASYNC_ENABLE
1545	gotasync = 1;	1766	async_pending = 1;
1546	#endif	1767	#endif
1547		1768
1548	ev_ref (EV_A);	1769	ev_ref (EV_A);
1549	ev_io_stop (EV_A_ &pipe_w);	1770	ev_io_stop (EV_A_ &pipe_w);
1550		1771
…		…
1553	close (evfd);	1774	close (evfd);
1554	#endif	1775	#endif
1555		1776
1556	if (evpipe [0] >= 0)	1777	if (evpipe [0] >= 0)
1557	{	1778	{
1558	close (evpipe [0]);	1779	EV_WIN32_CLOSE_FD (evpipe [0]);
1559	close (evpipe [1]);	1780	EV_WIN32_CLOSE_FD (evpipe [1]);
1560	}	1781	}
1561		1782
1562	evpipe_init (EV_A);	1783	evpipe_init (EV_A);
1563	/* now iterate over everything, in case we missed something */	1784	/* now iterate over everything, in case we missed something */
1564	pipecb (EV_A_ &pipe_w, EV_READ);	1785	pipecb (EV_A_ &pipe_w, EV_READ);
…		…
1570	#if EV_MULTIPLICITY	1791	#if EV_MULTIPLICITY
1571		1792
1572	struct ev_loop *	1793	struct ev_loop *
1573	ev_loop_new (unsigned int flags)	1794	ev_loop_new (unsigned int flags)
1574	{	1795	{
1575	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1796	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1576		1797
1577	memset (loop, 0, sizeof (struct ev_loop));	1798	memset (EV_A, 0, sizeof (struct ev_loop));
1578
1579	loop_init (EV_A_ flags);	1799	loop_init (EV_A_ flags);
1580		1800
1581	if (ev_backend (EV_A))	1801	if (ev_backend (EV_A))
1582	return loop;	1802	return EV_A;
1583		1803
1584	return 0;	1804	return 0;
1585	}	1805	}
1586		1806
1587	void	1807	void
…		…
1594	void	1814	void
1595	ev_loop_fork (EV_P)	1815	ev_loop_fork (EV_P)
1596	{	1816	{
1597	postfork = 1; /* must be in line with ev_default_fork */	1817	postfork = 1; /* must be in line with ev_default_fork */
1598	}	1818	}
		1819	#endif /* multiplicity */
1599		1820
1600	#if EV_VERIFY	1821	#if EV_VERIFY
1601	static void noinline	1822	static void noinline
1602	verify_watcher (EV_P_ W w)	1823	verify_watcher (EV_P_ W w)
1603	{	1824	{
…		…
1631	verify_watcher (EV_A_ ws [cnt]);	1852	verify_watcher (EV_A_ ws [cnt]);
1632	}	1853	}
1633	}	1854	}
1634	#endif	1855	#endif
1635		1856
		1857	#if EV_MINIMAL < 2
1636	void	1858	void
1637	ev_loop_verify (EV_P)	1859	ev_loop_verify (EV_P)
1638	{	1860	{
1639	#if EV_VERIFY	1861	#if EV_VERIFY
1640	int i;	1862	int i;
…		…
1689	assert (checkmax >= checkcnt);	1911	assert (checkmax >= checkcnt);
1690	array_verify (EV_A_ (W *)checks, checkcnt);	1912	array_verify (EV_A_ (W *)checks, checkcnt);
1691		1913
1692	# if 0	1914	# if 0
1693	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1915	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1694	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)	1916	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1695	# endif
1696	#endif	1917	# endif
		1918	#endif
1697	}	1919	}
1698		1920	#endif
1699	#endif /* multiplicity */
1700		1921
1701	#if EV_MULTIPLICITY	1922	#if EV_MULTIPLICITY
1702	struct ev_loop *	1923	struct ev_loop *
1703	ev_default_loop_init (unsigned int flags)	1924	ev_default_loop_init (unsigned int flags)
1704	#else	1925	#else
…		…
1707	#endif	1928	#endif
1708	{	1929	{
1709	if (!ev_default_loop_ptr)	1930	if (!ev_default_loop_ptr)
1710	{	1931	{
1711	#if EV_MULTIPLICITY	1932	#if EV_MULTIPLICITY
1712	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1933	EV_P = ev_default_loop_ptr = &default_loop_struct;
1713	#else	1934	#else
1714	ev_default_loop_ptr = 1;	1935	ev_default_loop_ptr = 1;
1715	#endif	1936	#endif
1716		1937
1717	loop_init (EV_A_ flags);	1938	loop_init (EV_A_ flags);
…		…
1734		1955
1735	void	1956	void
1736	ev_default_destroy (void)	1957	ev_default_destroy (void)
1737	{	1958	{
1738	#if EV_MULTIPLICITY	1959	#if EV_MULTIPLICITY
1739	struct ev_loop *loop = ev_default_loop_ptr;	1960	EV_P = ev_default_loop_ptr;
1740	#endif	1961	#endif
1741		1962
1742	ev_default_loop_ptr = 0;	1963	ev_default_loop_ptr = 0;
1743		1964
1744	#ifndef _WIN32	1965	#ifndef _WIN32
…		…
1751		1972
1752	void	1973	void
1753	ev_default_fork (void)	1974	ev_default_fork (void)
1754	{	1975	{
1755	#if EV_MULTIPLICITY	1976	#if EV_MULTIPLICITY
1756	struct ev_loop *loop = ev_default_loop_ptr;	1977	EV_P = ev_default_loop_ptr;
1757	#endif	1978	#endif
1758		1979
1759	postfork = 1; /* must be in line with ev_loop_fork */	1980	postfork = 1; /* must be in line with ev_loop_fork */
1760	}	1981	}
1761		1982
…		…
1765	ev_invoke (EV_P_ void *w, int revents)	1986	ev_invoke (EV_P_ void *w, int revents)
1766	{	1987	{
1767	EV_CB_INVOKE ((W)w, revents);	1988	EV_CB_INVOKE ((W)w, revents);
1768	}	1989	}
1769		1990
1770	inline_speed void	1991	unsigned int
1771	call_pending (EV_P)	1992	ev_pending_count (EV_P)
		1993	{
		1994	int pri;
		1995	unsigned int count = 0;
		1996
		1997	for (pri = NUMPRI; pri--; )
		1998	count += pendingcnt [pri];
		1999
		2000	return count;
		2001	}
		2002
		2003	void noinline
		2004	ev_invoke_pending (EV_P)
1772	{	2005	{
1773	int pri;	2006	int pri;
1774		2007
1775	for (pri = NUMPRI; pri--; )	2008	for (pri = NUMPRI; pri--; )
1776	while (pendingcnt [pri])	2009	while (pendingcnt [pri])
…		…
1944	ANHE_at_cache (*he);	2177	ANHE_at_cache (*he);
1945	}	2178	}
1946	}	2179	}
1947		2180
1948	/* fetch new monotonic and realtime times from the kernel */	2181	/* fetch new monotonic and realtime times from the kernel */
1949	/* also detetc if there was a timejump, and act accordingly */	2182	/* also detect if there was a timejump, and act accordingly */
1950	inline_speed void	2183	inline_speed void
1951	time_update (EV_P_ ev_tstamp max_block)	2184	time_update (EV_P_ ev_tstamp max_block)
1952	{	2185	{
1953	int i;
1954
1955	#if EV_USE_MONOTONIC	2186	#if EV_USE_MONOTONIC
1956	if (expect_true (have_monotonic))	2187	if (expect_true (have_monotonic))
1957	{	2188	{
		2189	int i;
1958	ev_tstamp odiff = rtmn_diff;	2190	ev_tstamp odiff = rtmn_diff;
1959		2191
1960	mn_now = get_clock ();	2192	mn_now = get_clock ();
1961		2193
1962	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */	2194	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
…		…
2012		2244
2013	mn_now = ev_rt_now;	2245	mn_now = ev_rt_now;
2014	}	2246	}
2015	}	2247	}
2016		2248
2017	static int loop_done;
2018
2019	void	2249	void
2020	ev_loop (EV_P_ int flags)	2250	ev_loop (EV_P_ int flags)
2021	{	2251	{
		2252	#if EV_MINIMAL < 2
		2253	++loop_depth;
		2254	#endif
		2255
		2256	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
		2257
2022	loop_done = EVUNLOOP_CANCEL;	2258	loop_done = EVUNLOOP_CANCEL;
2023		2259
2024	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2260	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2025		2261
2026	do	2262	do
2027	{	2263	{
2028	#if EV_VERIFY >= 2	2264	#if EV_VERIFY >= 2
2029	ev_loop_verify (EV_A);	2265	ev_loop_verify (EV_A);
…		…
2042	/* we might have forked, so queue fork handlers */	2278	/* we might have forked, so queue fork handlers */
2043	if (expect_false (postfork))	2279	if (expect_false (postfork))
2044	if (forkcnt)	2280	if (forkcnt)
2045	{	2281	{
2046	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2282	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2047	call_pending (EV_A);	2283	EV_INVOKE_PENDING;
2048	}	2284	}
2049	#endif	2285	#endif
2050		2286
2051	/* queue prepare watchers (and execute them) */	2287	/* queue prepare watchers (and execute them) */
2052	if (expect_false (preparecnt))	2288	if (expect_false (preparecnt))
2053	{	2289	{
2054	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2290	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2055	call_pending (EV_A);	2291	EV_INVOKE_PENDING;
2056	}	2292	}
		2293
		2294	if (expect_false (loop_done))
		2295	break;
2057		2296
2058	/* we might have forked, so reify kernel state if necessary */	2297	/* we might have forked, so reify kernel state if necessary */
2059	if (expect_false (postfork))	2298	if (expect_false (postfork))
2060	loop_fork (EV_A);	2299	loop_fork (EV_A);
2061		2300
…		…
2067	ev_tstamp waittime = 0.;	2306	ev_tstamp waittime = 0.;
2068	ev_tstamp sleeptime = 0.;	2307	ev_tstamp sleeptime = 0.;
2069		2308
2070	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2309	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2071	{	2310	{
		2311	/* remember old timestamp for io_blocktime calculation */
		2312	ev_tstamp prev_mn_now = mn_now;
		2313
2072	/* update time to cancel out callback processing overhead */	2314	/* update time to cancel out callback processing overhead */
2073	time_update (EV_A_ 1e100);	2315	time_update (EV_A_ 1e100);
2074		2316
2075	waittime = MAX_BLOCKTIME;	2317	waittime = MAX_BLOCKTIME;
2076		2318
…		…
2086	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2328	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2087	if (waittime > to) waittime = to;	2329	if (waittime > to) waittime = to;
2088	}	2330	}
2089	#endif	2331	#endif
2090		2332
		2333	/* don't let timeouts decrease the waittime below timeout_blocktime */
2091	if (expect_false (waittime < timeout_blocktime))	2334	if (expect_false (waittime < timeout_blocktime))
2092	waittime = timeout_blocktime;	2335	waittime = timeout_blocktime;
2093		2336
2094	sleeptime = waittime - backend_fudge;	2337	/* extra check because io_blocktime is commonly 0 */
2095
2096	if (expect_true (sleeptime > io_blocktime))	2338	if (expect_false (io_blocktime))
2097	sleeptime = io_blocktime;
2098
2099	if (sleeptime)
2100	{	2339	{
		2340	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2341
		2342	if (sleeptime > waittime - backend_fudge)
		2343	sleeptime = waittime - backend_fudge;
		2344
		2345	if (expect_true (sleeptime > 0.))
		2346	{
2101	ev_sleep (sleeptime);	2347	ev_sleep (sleeptime);
2102	waittime -= sleeptime;	2348	waittime -= sleeptime;
		2349	}
2103	}	2350	}
2104	}	2351	}
2105		2352
		2353	#if EV_MINIMAL < 2
2106	++loop_count;	2354	++loop_count;
		2355	#endif
		2356	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2107	backend_poll (EV_A_ waittime);	2357	backend_poll (EV_A_ waittime);
		2358	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2108		2359
2109	/* update ev_rt_now, do magic */	2360	/* update ev_rt_now, do magic */
2110	time_update (EV_A_ waittime + sleeptime);	2361	time_update (EV_A_ waittime + sleeptime);
2111	}	2362	}
2112		2363
…		…
2123		2374
2124	/* queue check watchers, to be executed first */	2375	/* queue check watchers, to be executed first */
2125	if (expect_false (checkcnt))	2376	if (expect_false (checkcnt))
2126	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2377	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2127		2378
2128	call_pending (EV_A);	2379	EV_INVOKE_PENDING;
2129	}	2380	}
2130	while (expect_true (	2381	while (expect_true (
2131	activecnt	2382	activecnt
2132	&& !loop_done	2383	&& !loop_done
2133	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2384	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2134	));	2385	));
2135		2386
2136	if (loop_done == EVUNLOOP_ONE)	2387	if (loop_done == EVUNLOOP_ONE)
2137	loop_done = EVUNLOOP_CANCEL;	2388	loop_done = EVUNLOOP_CANCEL;
		2389
		2390	#if EV_MINIMAL < 2
		2391	--loop_depth;
		2392	#endif
2138	}	2393	}
2139		2394
2140	void	2395	void
2141	ev_unloop (EV_P_ int how)	2396	ev_unloop (EV_P_ int how)
2142	{	2397	{
…		…
2193	inline_size void	2448	inline_size void
2194	wlist_del (WL *head, WL elem)	2449	wlist_del (WL *head, WL elem)
2195	{	2450	{
2196	while (*head)	2451	while (*head)
2197	{	2452	{
2198	if (*head == elem)	2453	if (expect_true (*head == elem))
2199	{	2454	{
2200	*head = elem->next;	2455	*head = elem->next;
2201	return;	2456	break;
2202	}	2457	}
2203		2458
2204	head = &(*head)->next;	2459	head = &(*head)->next;
2205	}	2460	}
2206	}	2461	}
…		…
2234	}	2489	}
2235		2490
2236	inline_size void	2491	inline_size void
2237	pri_adjust (EV_P_ W w)	2492	pri_adjust (EV_P_ W w)
2238	{	2493	{
2239	int pri = w->priority;	2494	int pri = ev_priority (w);
2240	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2495	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2241	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2496	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2242	w->priority = pri;	2497	ev_set_priority (w, pri);
2243	}	2498	}
2244		2499
2245	inline_speed void	2500	inline_speed void
2246	ev_start (EV_P_ W w, int active)	2501	ev_start (EV_P_ W w, int active)
2247	{	2502	{
…		…
2266		2521
2267	if (expect_false (ev_is_active (w)))	2522	if (expect_false (ev_is_active (w)))
2268	return;	2523	return;
2269		2524
2270	assert (("libev: ev_io_start called with negative fd", fd >= 0));	2525	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2271	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));	2526	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2272		2527
2273	EV_FREQUENT_CHECK;	2528	EV_FREQUENT_CHECK;
2274		2529
2275	ev_start (EV_A_ (W)w, 1);	2530	ev_start (EV_A_ (W)w, 1);
2276	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2531	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2277	wlist_add (&anfds[fd].head, (WL)w);	2532	wlist_add (&anfds[fd].head, (WL)w);
2278		2533
2279	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);	2534	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2280	w->events &= ~EV__IOFDSET;	2535	w->events &= ~EV__IOFDSET;
2281		2536
2282	EV_FREQUENT_CHECK;	2537	EV_FREQUENT_CHECK;
2283	}	2538	}
2284		2539
…		…
2346	timers [active] = timers [timercnt + HEAP0];	2601	timers [active] = timers [timercnt + HEAP0];
2347	adjustheap (timers, timercnt, active);	2602	adjustheap (timers, timercnt, active);
2348	}	2603	}
2349	}	2604	}
2350		2605
2351	EV_FREQUENT_CHECK;
2352
2353	ev_at (w) -= mn_now;	2606	ev_at (w) -= mn_now;
2354		2607
2355	ev_stop (EV_A_ (W)w);	2608	ev_stop (EV_A_ (W)w);
		2609
		2610	EV_FREQUENT_CHECK;
2356	}	2611	}
2357		2612
2358	void noinline	2613	void noinline
2359	ev_timer_again (EV_P_ ev_timer *w)	2614	ev_timer_again (EV_P_ ev_timer *w)
2360	{	2615	{
…		…
2378	}	2633	}
2379		2634
2380	EV_FREQUENT_CHECK;	2635	EV_FREQUENT_CHECK;
2381	}	2636	}
2382		2637
		2638	ev_tstamp
		2639	ev_timer_remaining (EV_P_ ev_timer *w)
		2640	{
		2641	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2642	}
		2643
2383	#if EV_PERIODIC_ENABLE	2644	#if EV_PERIODIC_ENABLE
2384	void noinline	2645	void noinline
2385	ev_periodic_start (EV_P_ ev_periodic *w)	2646	ev_periodic_start (EV_P_ ev_periodic *w)
2386	{	2647	{
2387	if (expect_false (ev_is_active (w)))	2648	if (expect_false (ev_is_active (w)))
…		…
2433	periodics [active] = periodics [periodiccnt + HEAP0];	2694	periodics [active] = periodics [periodiccnt + HEAP0];
2434	adjustheap (periodics, periodiccnt, active);	2695	adjustheap (periodics, periodiccnt, active);
2435	}	2696	}
2436	}	2697	}
2437		2698
2438	EV_FREQUENT_CHECK;
2439
2440	ev_stop (EV_A_ (W)w);	2699	ev_stop (EV_A_ (W)w);
		2700
		2701	EV_FREQUENT_CHECK;
2441	}	2702	}
2442		2703
2443	void noinline	2704	void noinline
2444	ev_periodic_again (EV_P_ ev_periodic *w)	2705	ev_periodic_again (EV_P_ ev_periodic *w)
2445	{	2706	{
…		…
2454	#endif	2715	#endif
2455		2716
2456	void noinline	2717	void noinline
2457	ev_signal_start (EV_P_ ev_signal *w)	2718	ev_signal_start (EV_P_ ev_signal *w)
2458	{	2719	{
2459	#if EV_MULTIPLICITY
2460	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2461	#endif
2462	if (expect_false (ev_is_active (w)))	2720	if (expect_false (ev_is_active (w)))
2463	return;	2721	return;
2464		2722
2465	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));	2723	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2466		2724
2467	evpipe_init (EV_A);	2725	#if EV_MULTIPLICITY
		2726	assert (("libev: a signal must not be attached to two different loops",
		2727	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2468		2728
2469	EV_FREQUENT_CHECK;	2729	signals [w->signum - 1].loop = EV_A;
		2730	#endif
2470		2731
		2732	EV_FREQUENT_CHECK;
		2733
		2734	#if EV_USE_SIGNALFD
		2735	if (sigfd == -2)
2471	{	2736	{
2472	#ifndef _WIN32	2737	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2473	sigset_t full, prev;	2738	if (sigfd < 0 && errno == EINVAL)
2474	sigfillset (&full);	2739	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2475	sigprocmask (SIG_SETMASK, &full, &prev);
2476	#endif
2477		2740
2478	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);	2741	if (sigfd >= 0)
		2742	{
		2743	fd_intern (sigfd); /* doing it twice will not hurt */
2479		2744
2480	#ifndef _WIN32	2745	sigemptyset (&sigfd_set);
2481	sigprocmask (SIG_SETMASK, &prev, 0);	2746
2482	#endif	2747	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2748	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2749	ev_io_start (EV_A_ &sigfd_w);
		2750	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2751	}
2483	}	2752	}
		2753
		2754	if (sigfd >= 0)
		2755	{
		2756	/* TODO: check .head */
		2757	sigaddset (&sigfd_set, w->signum);
		2758	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2759
		2760	signalfd (sigfd, &sigfd_set, 0);
		2761	}
		2762	#endif
2484		2763
2485	ev_start (EV_A_ (W)w, 1);	2764	ev_start (EV_A_ (W)w, 1);
2486	wlist_add (&signals [w->signum - 1].head, (WL)w);	2765	wlist_add (&signals [w->signum - 1].head, (WL)w);
2487		2766
2488	if (!((WL)w)->next)	2767	if (!((WL)w)->next)
		2768	# if EV_USE_SIGNALFD
		2769	if (sigfd < 0) /*TODO*/
		2770	# endif
2489	{	2771	{
2490	#if _WIN32	2772	# ifdef _WIN32
		2773	evpipe_init (EV_A);
		2774
2491	signal (w->signum, ev_sighandler);	2775	signal (w->signum, ev_sighandler);
2492	#else	2776	# else
2493	struct sigaction sa;	2777	struct sigaction sa;
		2778
		2779	evpipe_init (EV_A);
		2780
2494	sa.sa_handler = ev_sighandler;	2781	sa.sa_handler = ev_sighandler;
2495	sigfillset (&sa.sa_mask);	2782	sigfillset (&sa.sa_mask);
2496	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2783	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2497	sigaction (w->signum, &sa, 0);	2784	sigaction (w->signum, &sa, 0);
		2785
		2786	sigemptyset (&sa.sa_mask);
		2787	sigaddset (&sa.sa_mask, w->signum);
		2788	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2498	#endif	2789	#endif
2499	}	2790	}
2500		2791
2501	EV_FREQUENT_CHECK;	2792	EV_FREQUENT_CHECK;
2502	}	2793	}
2503		2794
2504	void noinline	2795	void noinline
…		…
2512		2803
2513	wlist_del (&signals [w->signum - 1].head, (WL)w);	2804	wlist_del (&signals [w->signum - 1].head, (WL)w);
2514	ev_stop (EV_A_ (W)w);	2805	ev_stop (EV_A_ (W)w);
2515		2806
2516	if (!signals [w->signum - 1].head)	2807	if (!signals [w->signum - 1].head)
		2808	{
		2809	#if EV_MULTIPLICITY
		2810	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2811	#endif
		2812	#if EV_USE_SIGNALFD
		2813	if (sigfd >= 0)
		2814	{
		2815	sigset_t ss;
		2816
		2817	sigemptyset (&ss);
		2818	sigaddset (&ss, w->signum);
		2819	sigdelset (&sigfd_set, w->signum);
		2820
		2821	signalfd (sigfd, &sigfd_set, 0);
		2822	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2823	}
		2824	else
		2825	#endif
2517	signal (w->signum, SIG_DFL);	2826	signal (w->signum, SIG_DFL);
		2827	}
2518		2828
2519	EV_FREQUENT_CHECK;	2829	EV_FREQUENT_CHECK;
2520	}	2830	}
2521		2831
2522	void	2832	void
…		…
2563	#define MIN_STAT_INTERVAL 0.1074891	2873	#define MIN_STAT_INTERVAL 0.1074891
2564		2874
2565	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2875	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2566		2876
2567	#if EV_USE_INOTIFY	2877	#if EV_USE_INOTIFY
2568	# define EV_INOTIFY_BUFSIZE 8192	2878
		2879	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2880	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2569		2881
2570	static void noinline	2882	static void noinline
2571	infy_add (EV_P_ ev_stat *w)	2883	infy_add (EV_P_ ev_stat *w)
2572	{	2884	{
2573	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);	2885	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);
2574		2886
2575	if (w->wd < 0)	2887	if (w->wd >= 0)
		2888	{
		2889	struct statfs sfs;
		2890
		2891	/* now local changes will be tracked by inotify, but remote changes won't */
		2892	/* unless the filesystem is known to be local, we therefore still poll */
		2893	/* also do poll on <2.6.25, but with normal frequency */
		2894
		2895	if (!fs_2625)
		2896	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2897	else if (!statfs (w->path, &sfs)
		2898	&& (sfs.f_type == 0x1373 /* devfs */
		2899	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2900	|| sfs.f_type == 0x3153464a /* jfs */
		2901	|| sfs.f_type == 0x52654973 /* reiser3 */
		2902	|| sfs.f_type == 0x01021994 /* tempfs */
		2903	|| sfs.f_type == 0x58465342 /* xfs */))
		2904	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		2905	else
		2906	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2576	{	2907	}
		2908	else
		2909	{
		2910	/* can't use inotify, continue to stat */
2577	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;	2911	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2578	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2579		2912
2580	/* monitor some parent directory for speedup hints */	2913	/* if path is not there, monitor some parent directory for speedup hints */
2581	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2914	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2582	/* but an efficiency issue only */	2915	/* but an efficiency issue only */
2583	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2916	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2584	{	2917	{
2585	char path [4096];	2918	char path [4096];
…		…
2601	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2934	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2602	}	2935	}
2603	}	2936	}
2604		2937
2605	if (w->wd >= 0)	2938	if (w->wd >= 0)
2606	{
2607	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2939	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2608		2940
2609	/* now local changes will be tracked by inotify, but remote changes won't */	2941	/* now re-arm timer, if required */
2610	/* unless the filesystem it known to be local, we therefore still poll */	2942	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2611	/* also do poll on <2.6.25, but with normal frequency */
2612	struct statfs sfs;
2613
2614	if (fs_2625 && !statfs (w->path, &sfs))
2615	if (sfs.f_type == 0x1373 /* devfs */
2616	|| sfs.f_type == 0xEF53 /* ext2/3 */
2617	|| sfs.f_type == 0x3153464a /* jfs */
2618	|| sfs.f_type == 0x52654973 /* reiser3 */
2619	|| sfs.f_type == 0x01021994 /* tempfs */
2620	|| sfs.f_type == 0x58465342 /* xfs */)
2621	return;
2622
2623	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2624	ev_timer_again (EV_A_ &w->timer);	2943	ev_timer_again (EV_A_ &w->timer);
2625	}	2944	if (ev_is_active (&w->timer)) ev_unref (EV_A);
2626	}	2945	}
2627		2946
2628	static void noinline	2947	static void noinline
2629	infy_del (EV_P_ ev_stat *w)	2948	infy_del (EV_P_ ev_stat *w)
2630	{	2949	{
…		…
2675		2994
2676	static void	2995	static void
2677	infy_cb (EV_P_ ev_io *w, int revents)	2996	infy_cb (EV_P_ ev_io *w, int revents)
2678	{	2997	{
2679	char buf [EV_INOTIFY_BUFSIZE];	2998	char buf [EV_INOTIFY_BUFSIZE];
2680	struct inotify_event *ev = (struct inotify_event *)buf;
2681	int ofs;	2999	int ofs;
2682	int len = read (fs_fd, buf, sizeof (buf));	3000	int len = read (fs_fd, buf, sizeof (buf));
2683		3001
2684	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	3002	for (ofs = 0; ofs < len; )
		3003	{
		3004	struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2685	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3005	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3006	ofs += sizeof (struct inotify_event) + ev->len;
		3007	}
		3008	}
		3009
		3010	inline_size unsigned int
		3011	ev_linux_version (void)
		3012	{
		3013	struct utsname buf;
		3014	unsigned int v;
		3015	int i;
		3016	char *p = buf.release;
		3017
		3018	if (uname (&buf))
		3019	return 0;
		3020
		3021	for (i = 3+1; --i; )
		3022	{
		3023	unsigned int c = 0;
		3024
		3025	for (;;)
		3026	{
		3027	if (*p >= '0' && *p <= '9')
		3028	c = c * 10 + *p++ - '0';
		3029	else
		3030	{
		3031	p += *p == '.';
		3032	break;
		3033	}
		3034	}
		3035
		3036	v = (v << 8) | c;
		3037	}
		3038
		3039	return v;
2686	}	3040	}
2687		3041
2688	inline_size void	3042	inline_size void
2689	check_2625 (EV_P)	3043	ev_check_2625 (EV_P)
2690	{	3044	{
2691	/* kernels < 2.6.25 are borked	3045	/* kernels < 2.6.25 are borked
2692	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3046	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2693	*/	3047	*/
2694	struct utsname buf;	3048	if (ev_linux_version () < 0x020619)
2695	int major, minor, micro;
2696
2697	if (uname (&buf))
2698	return;	3049	return;
2699		3050
2700	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2701	return;
2702
2703	if (major < 2
2704	|| (major == 2 && minor < 6)
2705	|| (major == 2 && minor == 6 && micro < 25))
2706	return;
2707
2708	fs_2625 = 1;	3051	fs_2625 = 1;
		3052	}
		3053
		3054	inline_size int
		3055	infy_newfd (void)
		3056	{
		3057	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3058	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		3059	if (fd >= 0)
		3060	return fd;
		3061	#endif
		3062	return inotify_init ();
2709	}	3063	}
2710		3064
2711	inline_size void	3065	inline_size void
2712	infy_init (EV_P)	3066	infy_init (EV_P)
2713	{	3067	{
2714	if (fs_fd != -2)	3068	if (fs_fd != -2)
2715	return;	3069	return;
2716		3070
2717	fs_fd = -1;	3071	fs_fd = -1;
2718		3072
2719	check_2625 (EV_A);	3073	ev_check_2625 (EV_A);
2720		3074
2721	fs_fd = inotify_init ();	3075	fs_fd = infy_newfd ();
2722		3076
2723	if (fs_fd >= 0)	3077	if (fs_fd >= 0)
2724	{	3078	{
		3079	fd_intern (fs_fd);
2725	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3080	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2726	ev_set_priority (&fs_w, EV_MAXPRI);	3081	ev_set_priority (&fs_w, EV_MAXPRI);
2727	ev_io_start (EV_A_ &fs_w);	3082	ev_io_start (EV_A_ &fs_w);
		3083	ev_unref (EV_A);
2728	}	3084	}
2729	}	3085	}
2730		3086
2731	inline_size void	3087	inline_size void
2732	infy_fork (EV_P)	3088	infy_fork (EV_P)
…		…
2734	int slot;	3090	int slot;
2735		3091
2736	if (fs_fd < 0)	3092	if (fs_fd < 0)
2737	return;	3093	return;
2738		3094
		3095	ev_ref (EV_A);
		3096	ev_io_stop (EV_A_ &fs_w);
2739	close (fs_fd);	3097	close (fs_fd);
2740	fs_fd = inotify_init ();	3098	fs_fd = infy_newfd ();
		3099
		3100	if (fs_fd >= 0)
		3101	{
		3102	fd_intern (fs_fd);
		3103	ev_io_set (&fs_w, fs_fd, EV_READ);
		3104	ev_io_start (EV_A_ &fs_w);
		3105	ev_unref (EV_A);
		3106	}
2741		3107
2742	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3108	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2743	{	3109	{
2744	WL w_ = fs_hash [slot].head;	3110	WL w_ = fs_hash [slot].head;
2745	fs_hash [slot].head = 0;	3111	fs_hash [slot].head = 0;
…		…
2752	w->wd = -1;	3118	w->wd = -1;
2753		3119
2754	if (fs_fd >= 0)	3120	if (fs_fd >= 0)
2755	infy_add (EV_A_ w); /* re-add, no matter what */	3121	infy_add (EV_A_ w); /* re-add, no matter what */
2756	else	3122	else
		3123	{
		3124	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3125	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2757	ev_timer_again (EV_A_ &w->timer);	3126	ev_timer_again (EV_A_ &w->timer);
		3127	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3128	}
2758	}	3129	}
2759	}	3130	}
2760	}	3131	}
2761		3132
2762	#endif	3133	#endif
…		…
2779	static void noinline	3150	static void noinline
2780	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3151	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2781	{	3152	{
2782	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));	3153	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2783		3154
2784	/* we copy this here each the time so that */	3155	ev_statdata prev = w->attr;
2785	/* prev has the old value when the callback gets invoked */
2786	w->prev = w->attr;
2787	ev_stat_stat (EV_A_ w);	3156	ev_stat_stat (EV_A_ w);
2788		3157
2789	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3158	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2790	if (	3159	if (
2791	w->prev.st_dev != w->attr.st_dev	3160	prev.st_dev != w->attr.st_dev
2792	|| w->prev.st_ino != w->attr.st_ino	3161	|| prev.st_ino != w->attr.st_ino
2793	|| w->prev.st_mode != w->attr.st_mode	3162	|| prev.st_mode != w->attr.st_mode
2794	|| w->prev.st_nlink != w->attr.st_nlink	3163	|| prev.st_nlink != w->attr.st_nlink
2795	|| w->prev.st_uid != w->attr.st_uid	3164	|| prev.st_uid != w->attr.st_uid
2796	|| w->prev.st_gid != w->attr.st_gid	3165	|| prev.st_gid != w->attr.st_gid
2797	|| w->prev.st_rdev != w->attr.st_rdev	3166	|| prev.st_rdev != w->attr.st_rdev
2798	|| w->prev.st_size != w->attr.st_size	3167	|| prev.st_size != w->attr.st_size
2799	|| w->prev.st_atime != w->attr.st_atime	3168	|| prev.st_atime != w->attr.st_atime
2800	|| w->prev.st_mtime != w->attr.st_mtime	3169	|| prev.st_mtime != w->attr.st_mtime
2801	|| w->prev.st_ctime != w->attr.st_ctime	3170	|| prev.st_ctime != w->attr.st_ctime
2802	) {	3171	) {
		3172	/* we only update w->prev on actual differences */
		3173	/* in case we test more often than invoke the callback, */
		3174	/* to ensure that prev is always different to attr */
		3175	w->prev = prev;
		3176
2803	#if EV_USE_INOTIFY	3177	#if EV_USE_INOTIFY
2804	if (fs_fd >= 0)	3178	if (fs_fd >= 0)
2805	{	3179	{
2806	infy_del (EV_A_ w);	3180	infy_del (EV_A_ w);
2807	infy_add (EV_A_ w);	3181	infy_add (EV_A_ w);
…		…
2832		3206
2833	if (fs_fd >= 0)	3207	if (fs_fd >= 0)
2834	infy_add (EV_A_ w);	3208	infy_add (EV_A_ w);
2835	else	3209	else
2836	#endif	3210	#endif
		3211	{
2837	ev_timer_again (EV_A_ &w->timer);	3212	ev_timer_again (EV_A_ &w->timer);
		3213	ev_unref (EV_A);
		3214	}
2838		3215
2839	ev_start (EV_A_ (W)w, 1);	3216	ev_start (EV_A_ (W)w, 1);
2840		3217
2841	EV_FREQUENT_CHECK;	3218	EV_FREQUENT_CHECK;
2842	}	3219	}
…		…
2851	EV_FREQUENT_CHECK;	3228	EV_FREQUENT_CHECK;
2852		3229
2853	#if EV_USE_INOTIFY	3230	#if EV_USE_INOTIFY
2854	infy_del (EV_A_ w);	3231	infy_del (EV_A_ w);
2855	#endif	3232	#endif
		3233
		3234	if (ev_is_active (&w->timer))
		3235	{
		3236	ev_ref (EV_A);
2856	ev_timer_stop (EV_A_ &w->timer);	3237	ev_timer_stop (EV_A_ &w->timer);
		3238	}
2857		3239
2858	ev_stop (EV_A_ (W)w);	3240	ev_stop (EV_A_ (W)w);
2859		3241
2860	EV_FREQUENT_CHECK;	3242	EV_FREQUENT_CHECK;
2861	}	3243	}
…		…
3002	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3384	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3003	{	3385	{
3004	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));	3386	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3005		3387
3006	{	3388	{
3007	struct ev_loop *loop = w->other;	3389	EV_P = w->other;
3008		3390
3009	while (fdchangecnt)	3391	while (fdchangecnt)
3010	{	3392	{
3011	fd_reify (EV_A);	3393	fd_reify (EV_A);
3012	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3394	ev_loop (EV_A_ EVLOOP_NONBLOCK);
…		…
3020	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3402	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3021		3403
3022	ev_embed_stop (EV_A_ w);	3404	ev_embed_stop (EV_A_ w);
3023		3405
3024	{	3406	{
3025	struct ev_loop *loop = w->other;	3407	EV_P = w->other;
3026		3408
3027	ev_loop_fork (EV_A);	3409	ev_loop_fork (EV_A);
3028	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3410	ev_loop (EV_A_ EVLOOP_NONBLOCK);
3029	}	3411	}
3030		3412
…		…
3044	{	3426	{
3045	if (expect_false (ev_is_active (w)))	3427	if (expect_false (ev_is_active (w)))
3046	return;	3428	return;
3047		3429
3048	{	3430	{
3049	struct ev_loop *loop = w->other;	3431	EV_P = w->other;
3050	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3432	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3051	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3433	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3052	}	3434	}
3053		3435
3054	EV_FREQUENT_CHECK;	3436	EV_FREQUENT_CHECK;
…		…
3081		3463
3082	ev_io_stop (EV_A_ &w->io);	3464	ev_io_stop (EV_A_ &w->io);
3083	ev_prepare_stop (EV_A_ &w->prepare);	3465	ev_prepare_stop (EV_A_ &w->prepare);
3084	ev_fork_stop (EV_A_ &w->fork);	3466	ev_fork_stop (EV_A_ &w->fork);
3085		3467
		3468	ev_stop (EV_A_ (W)w);
		3469
3086	EV_FREQUENT_CHECK;	3470	EV_FREQUENT_CHECK;
3087	}	3471	}
3088	#endif	3472	#endif
3089		3473
3090	#if EV_FORK_ENABLE	3474	#if EV_FORK_ENABLE
…		…
3166		3550
3167	void	3551	void
3168	ev_async_send (EV_P_ ev_async *w)	3552	ev_async_send (EV_P_ ev_async *w)
3169	{	3553	{
3170	w->sent = 1;	3554	w->sent = 1;
3171	evpipe_write (EV_A_ &gotasync);	3555	evpipe_write (EV_A_ &async_pending);
3172	}	3556	}
3173	#endif	3557	#endif
3174		3558
3175	/*****************************************************************************/	3559	/*****************************************************************************/
3176		3560
…		…
3325	if (types & EV_CHECK)	3709	if (types & EV_CHECK)
3326	for (i = checkcnt; i--; )	3710	for (i = checkcnt; i--; )
3327	cb (EV_A_ EV_CHECK, checks [i]);	3711	cb (EV_A_ EV_CHECK, checks [i]);
3328		3712
3329	if (types & EV_SIGNAL)	3713	if (types & EV_SIGNAL)
3330	for (i = 0; i < signalmax; ++i)	3714	for (i = 0; i < EV_NSIG - 1; ++i)
3331	for (wl = signals [i].head; wl; )	3715	for (wl = signals [i].head; wl; )
3332	{	3716	{
3333	wn = wl->next;	3717	wn = wl->next;
3334	cb (EV_A_ EV_SIGNAL, wl);	3718	cb (EV_A_ EV_SIGNAL, wl);
3335	wl = wn;	3719	wl = wn;

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