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Comparing libev/ev.c (file contents):
Revision 1.290 by root, Mon Jun 29 04:41:34 2009 UTC vs.
Revision 1.333 by root, Tue Mar 9 08:58:22 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	*
…		…
110	# define EV_USE_EPOLL 0	110	# define EV_USE_EPOLL 0
111	# endif	111	# endif
112	# endif	112	# endif
113		113
114	# ifndef EV_USE_KQUEUE	114	# ifndef EV_USE_KQUEUE
115	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	115	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
116	# define EV_USE_KQUEUE 1	116	# define EV_USE_KQUEUE 1
117	# else	117	# else
118	# define EV_USE_KQUEUE 0	118	# define EV_USE_KQUEUE 0
119	# endif	119	# endif
120	# endif	120	# endif
…		…
133	# else	133	# else
134	# define EV_USE_INOTIFY 0	134	# define EV_USE_INOTIFY 0
135	# endif	135	# endif
136	# endif	136	# endif
137		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
138	# ifndef EV_USE_EVENTFD	146	# ifndef EV_USE_EVENTFD
139	# if HAVE_EVENTFD	147	# if HAVE_EVENTFD
140	# define EV_USE_EVENTFD 1	148	# define EV_USE_EVENTFD 1
141	# else	149	# else
142	# define EV_USE_EVENTFD 0	150	# define EV_USE_EVENTFD 0
…		…
145		153
146	#endif	154	#endif
147		155
148	#include <math.h>	156	#include <math.h>
149	#include <stdlib.h>	157	#include <stdlib.h>
		158	#include <string.h>
150	#include <fcntl.h>	159	#include <fcntl.h>
151	#include <stddef.h>	160	#include <stddef.h>
152		161
153	#include <stdio.h>	162	#include <stdio.h>
154		163
155	#include <assert.h>	164	#include <assert.h>
156	#include <errno.h>	165	#include <errno.h>
157	#include <sys/types.h>	166	#include <sys/types.h>
158	#include <time.h>	167	#include <time.h>
		168	#include <limits.h>
159		169
160	#include <signal.h>	170	#include <signal.h>
161		171
162	#ifdef EV_H	172	#ifdef EV_H
163	# include EV_H	173	# include EV_H
…		…
174	# define WIN32_LEAN_AND_MEAN	184	# define WIN32_LEAN_AND_MEAN
175	# include <windows.h>	185	# include <windows.h>
176	# ifndef EV_SELECT_IS_WINSOCKET	186	# ifndef EV_SELECT_IS_WINSOCKET
177	# define EV_SELECT_IS_WINSOCKET 1	187	# define EV_SELECT_IS_WINSOCKET 1
178	# endif	188	# endif
		189	# undef EV_AVOID_STDIO
179	#endif	190	#endif
180		191
181	/* this block tries to deduce configuration from header-defined symbols and defaults */	192	/* this block tries to deduce configuration from header-defined symbols and defaults */
		193
		194	/* try to deduce the maximum number of signals on this platform */
		195	#if defined (EV_NSIG)
		196	/* use what's provided */
		197	#elif defined (NSIG)
		198	# define EV_NSIG (NSIG)
		199	#elif defined(_NSIG)
		200	# define EV_NSIG (_NSIG)
		201	#elif defined (SIGMAX)
		202	# define EV_NSIG (SIGMAX+1)
		203	#elif defined (SIG_MAX)
		204	# define EV_NSIG (SIG_MAX+1)
		205	#elif defined (_SIG_MAX)
		206	# define EV_NSIG (_SIG_MAX+1)
		207	#elif defined (MAXSIG)
		208	# define EV_NSIG (MAXSIG+1)
		209	#elif defined (MAX_SIG)
		210	# define EV_NSIG (MAX_SIG+1)
		211	#elif defined (SIGARRAYSIZE)
		212	# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
		213	#elif defined (_sys_nsig)
		214	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		215	#else
		216	# error "unable to find value for NSIG, please report"
		217	/* to make it compile regardless, just remove the above line */
		218	# define EV_NSIG 65
		219	#endif
182		220
183	#ifndef EV_USE_CLOCK_SYSCALL	221	#ifndef EV_USE_CLOCK_SYSCALL
184	# if __linux && __GLIBC__ >= 2	222	# if __linux && __GLIBC__ >= 2
185	# define EV_USE_CLOCK_SYSCALL 1	223	# define EV_USE_CLOCK_SYSCALL 1
186	# else	224	# else
…		…
266	# else	304	# else
267	# define EV_USE_EVENTFD 0	305	# define EV_USE_EVENTFD 0
268	# endif	306	# endif
269	#endif	307	#endif
270		308
		309	#ifndef EV_USE_SIGNALFD
		310	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		311	# define EV_USE_SIGNALFD 1
		312	# else
		313	# define EV_USE_SIGNALFD 0
		314	# endif
		315	#endif
		316
271	#if 0 /* debugging */	317	#if 0 /* debugging */
272	# define EV_VERIFY 3	318	# define EV_VERIFY 3
273	# define EV_USE_4HEAP 1	319	# define EV_USE_4HEAP 1
274	# define EV_HEAP_CACHE_AT 1	320	# define EV_HEAP_CACHE_AT 1
275	#endif	321	#endif
…		…
282	# define EV_USE_4HEAP !EV_MINIMAL	328	# define EV_USE_4HEAP !EV_MINIMAL
283	#endif	329	#endif
284		330
285	#ifndef EV_HEAP_CACHE_AT	331	#ifndef EV_HEAP_CACHE_AT
286	# define EV_HEAP_CACHE_AT !EV_MINIMAL	332	# define EV_HEAP_CACHE_AT !EV_MINIMAL
287	#endif
288
289	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
290
291	#ifndef CLOCK_MONOTONIC
292	# undef EV_USE_MONOTONIC
293	# define EV_USE_MONOTONIC 0
294	#endif
295
296	#ifndef CLOCK_REALTIME
297	# undef EV_USE_REALTIME
298	# define EV_USE_REALTIME 0
299	#endif
300
301	#if !EV_STAT_ENABLE
302	# undef EV_USE_INOTIFY
303	# define EV_USE_INOTIFY 0
304	#endif
305
306	#if !EV_USE_NANOSLEEP
307	# ifndef _WIN32
308	# include <sys/select.h>
309	# endif
310	#endif
311
312	#if EV_USE_INOTIFY
313	# include <sys/utsname.h>
314	# include <sys/statfs.h>
315	# include <sys/inotify.h>
316	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
317	# ifndef IN_DONT_FOLLOW
318	# undef EV_USE_INOTIFY
319	# define EV_USE_INOTIFY 0
320	# endif
321	#endif
322
323	#if EV_SELECT_IS_WINSOCKET
324	# include <winsock.h>
325	#endif	333	#endif
326		334
327	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */	335	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
328	/* which makes programs even slower. might work on other unices, too. */	336	/* which makes programs even slower. might work on other unices, too. */
329	#if EV_USE_CLOCK_SYSCALL	337	#if EV_USE_CLOCK_SYSCALL
…		…
336	# undef EV_USE_CLOCK_SYSCALL	344	# undef EV_USE_CLOCK_SYSCALL
337	# define EV_USE_CLOCK_SYSCALL 0	345	# define EV_USE_CLOCK_SYSCALL 0
338	# endif	346	# endif
339	#endif	347	#endif
340		348
		349	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		350
		351	#ifdef _AIX
		352	/* AIX has a completely broken poll.h header */
		353	# undef EV_USE_POLL
		354	# define EV_USE_POLL 0
		355	#endif
		356
		357	#ifndef CLOCK_MONOTONIC
		358	# undef EV_USE_MONOTONIC
		359	# define EV_USE_MONOTONIC 0
		360	#endif
		361
		362	#ifndef CLOCK_REALTIME
		363	# undef EV_USE_REALTIME
		364	# define EV_USE_REALTIME 0
		365	#endif
		366
		367	#if !EV_STAT_ENABLE
		368	# undef EV_USE_INOTIFY
		369	# define EV_USE_INOTIFY 0
		370	#endif
		371
		372	#if !EV_USE_NANOSLEEP
		373	# ifndef _WIN32
		374	# include <sys/select.h>
		375	# endif
		376	#endif
		377
		378	#if EV_USE_INOTIFY
		379	# include <sys/utsname.h>
		380	# include <sys/statfs.h>
		381	# include <sys/inotify.h>
		382	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		383	# ifndef IN_DONT_FOLLOW
		384	# undef EV_USE_INOTIFY
		385	# define EV_USE_INOTIFY 0
		386	# endif
		387	#endif
		388
		389	#if EV_SELECT_IS_WINSOCKET
		390	# include <winsock.h>
		391	#endif
		392
341	#if EV_USE_EVENTFD	393	#if EV_USE_EVENTFD
342	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	394	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
343	# include <stdint.h>	395	# include <stdint.h>
		396	# ifndef EFD_NONBLOCK
		397	# define EFD_NONBLOCK O_NONBLOCK
		398	# endif
		399	# ifndef EFD_CLOEXEC
		400	# ifdef O_CLOEXEC
		401	# define EFD_CLOEXEC O_CLOEXEC
		402	# else
		403	# define EFD_CLOEXEC 02000000
		404	# endif
		405	# endif
344	# ifdef __cplusplus	406	# ifdef __cplusplus
345	extern "C" {	407	extern "C" {
346	# endif	408	# endif
347	int eventfd (unsigned int initval, int flags);	409	int (eventfd) (unsigned int initval, int flags);
348	# ifdef __cplusplus	410	# ifdef __cplusplus
349	}	411	}
350	# endif	412	# endif
351	#endif	413	#endif
		414
		415	#if EV_USE_SIGNALFD
		416	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		417	# include <stdint.h>
		418	# ifndef SFD_NONBLOCK
		419	# define SFD_NONBLOCK O_NONBLOCK
		420	# endif
		421	# ifndef SFD_CLOEXEC
		422	# ifdef O_CLOEXEC
		423	# define SFD_CLOEXEC O_CLOEXEC
		424	# else
		425	# define SFD_CLOEXEC 02000000
		426	# endif
		427	# endif
		428	# ifdef __cplusplus
		429	extern "C" {
		430	# endif
		431	int signalfd (int fd, const sigset_t *mask, int flags);
		432
		433	struct signalfd_siginfo
		434	{
		435	uint32_t ssi_signo;
		436	char pad[128 - sizeof (uint32_t)];
		437	};
		438	# ifdef __cplusplus
		439	}
		440	# endif
		441	#endif
		442
352		443
353	/**/	444	/**/
354		445
355	#if EV_VERIFY >= 3	446	#if EV_VERIFY >= 3
356	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	447	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
…		…
368	*/	459	*/
369	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	460	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
370		461
371	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	462	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
372	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	463	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
373	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
374		464
375	#if __GNUC__ >= 4	465	#if __GNUC__ >= 4
376	# define expect(expr,value) __builtin_expect ((expr),(value))	466	# define expect(expr,value) __builtin_expect ((expr),(value))
377	# define noinline __attribute__ ((noinline))	467	# define noinline __attribute__ ((noinline))
378	#else	468	#else
…		…
391	# define inline_speed static noinline	481	# define inline_speed static noinline
392	#else	482	#else
393	# define inline_speed static inline	483	# define inline_speed static inline
394	#endif	484	#endif
395		485
396	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	486	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		487
		488	#if EV_MINPRI == EV_MAXPRI
		489	# define ABSPRI(w) (((W)w), 0)
		490	#else
397	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	491	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		492	#endif
398		493
399	#define EMPTY /* required for microsofts broken pseudo-c compiler */	494	#define EMPTY /* required for microsofts broken pseudo-c compiler */
400	#define EMPTY2(a,b) /* used to suppress some warnings */	495	#define EMPTY2(a,b) /* used to suppress some warnings */
401		496
402	typedef ev_watcher *W;	497	typedef ev_watcher *W;
…		…
414		509
415	#if EV_USE_MONOTONIC	510	#if EV_USE_MONOTONIC
416	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	511	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
417	#endif	512	#endif
418		513
		514	#ifndef EV_FD_TO_WIN32_HANDLE
		515	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		516	#endif
		517	#ifndef EV_WIN32_HANDLE_TO_FD
		518	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		519	#endif
		520	#ifndef EV_WIN32_CLOSE_FD
		521	# define EV_WIN32_CLOSE_FD(fd) close (fd)
		522	#endif
		523
419	#ifdef _WIN32	524	#ifdef _WIN32
420	# include "ev_win32.c"	525	# include "ev_win32.c"
421	#endif	526	#endif
422		527
423	/*****************************************************************************/	528	/*****************************************************************************/
		529
		530	#if EV_AVOID_STDIO
		531	static void noinline
		532	ev_printerr (const char *msg)
		533	{
		534	write (STDERR_FILENO, msg, strlen (msg));
		535	}
		536	#endif
424		537
425	static void (*syserr_cb)(const char *msg);	538	static void (*syserr_cb)(const char *msg);
426		539
427	void	540	void
428	ev_set_syserr_cb (void (*cb)(const char *msg))	541	ev_set_syserr_cb (void (*cb)(const char *msg))
…		…
438		551
439	if (syserr_cb)	552	if (syserr_cb)
440	syserr_cb (msg);	553	syserr_cb (msg);
441	else	554	else
442	{	555	{
		556	#if EV_AVOID_STDIO
		557	const char *err = strerror (errno);
		558
		559	ev_printerr (msg);
		560	ev_printerr (": ");
		561	ev_printerr (err);
		562	ev_printerr ("\n");
		563	#else
443	perror (msg);	564	perror (msg);
		565	#endif
444	abort ();	566	abort ();
445	}	567	}
446	}	568	}
447		569
448	static void *	570	static void *
…		…
473	{	595	{
474	ptr = alloc (ptr, size);	596	ptr = alloc (ptr, size);
475		597
476	if (!ptr && size)	598	if (!ptr && size)
477	{	599	{
		600	#if EV_AVOID_STDIO
		601	ev_printerr ("libev: memory allocation failed, aborting.\n");
		602	#else
478	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	603	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		604	#endif
479	abort ();	605	abort ();
480	}	606	}
481		607
482	return ptr;	608	return ptr;
483	}	609	}
…		…
485	#define ev_malloc(size) ev_realloc (0, (size))	611	#define ev_malloc(size) ev_realloc (0, (size))
486	#define ev_free(ptr) ev_realloc ((ptr), 0)	612	#define ev_free(ptr) ev_realloc ((ptr), 0)
487		613
488	/*****************************************************************************/	614	/*****************************************************************************/
489		615
		616	/* set in reify when reification needed */
		617	#define EV_ANFD_REIFY 1
		618
490	/* file descriptor info structure */	619	/* file descriptor info structure */
491	typedef struct	620	typedef struct
492	{	621	{
493	WL head;	622	WL head;
494	unsigned char events; /* the events watched for */	623	unsigned char events; /* the events watched for */
495	unsigned char reify; /* flag set when this ANFD needs reification */	624	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
496	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	625	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
497	unsigned char unused;	626	unsigned char unused;
498	#if EV_USE_EPOLL	627	#if EV_USE_EPOLL
499	unsigned int egen; /* generation counter to counter epoll bugs */	628	unsigned int egen; /* generation counter to counter epoll bugs */
500	#endif	629	#endif
…		…
562		691
563	static int ev_default_loop_ptr;	692	static int ev_default_loop_ptr;
564		693
565	#endif	694	#endif
566		695
		696	#if EV_MINIMAL < 2
		697	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		698	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		699	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		700	#else
		701	# define EV_RELEASE_CB (void)0
		702	# define EV_ACQUIRE_CB (void)0
		703	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		704	#endif
		705
		706	#define EVUNLOOP_RECURSE 0x80
		707
567	/*****************************************************************************/	708	/*****************************************************************************/
568		709
		710	#ifndef EV_HAVE_EV_TIME
569	ev_tstamp	711	ev_tstamp
570	ev_time (void)	712	ev_time (void)
571	{	713	{
572	#if EV_USE_REALTIME	714	#if EV_USE_REALTIME
573	if (expect_true (have_realtime))	715	if (expect_true (have_realtime))
…		…
580		722
581	struct timeval tv;	723	struct timeval tv;
582	gettimeofday (&tv, 0);	724	gettimeofday (&tv, 0);
583	return tv.tv_sec + tv.tv_usec * 1e-6;	725	return tv.tv_sec + tv.tv_usec * 1e-6;
584	}	726	}
		727	#endif
585		728
586	inline_size ev_tstamp	729	inline_size ev_tstamp
587	get_clock (void)	730	get_clock (void)
588	{	731	{
589	#if EV_USE_MONOTONIC	732	#if EV_USE_MONOTONIC
…		…
625		768
626	tv.tv_sec = (time_t)delay;	769	tv.tv_sec = (time_t)delay;
627	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	770	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
628		771
629	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	772	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
630	/* somehting nto guaranteed by newer posix versions, but guaranteed */	773	/* something not guaranteed by newer posix versions, but guaranteed */
631	/* by older ones */	774	/* by older ones */
632	select (0, 0, 0, 0, &tv);	775	select (0, 0, 0, 0, &tv);
633	#endif	776	#endif
634	}	777	}
635	}	778	}
…		…
743	}	886	}
744		887
745	/*****************************************************************************/	888	/*****************************************************************************/
746		889
747	inline_speed void	890	inline_speed void
748	fd_event (EV_P_ int fd, int revents)	891	fd_event_nc (EV_P_ int fd, int revents)
749	{	892	{
750	ANFD *anfd = anfds + fd;	893	ANFD *anfd = anfds + fd;
751	ev_io *w;	894	ev_io *w;
752		895
753	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	896	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
757	if (ev)	900	if (ev)
758	ev_feed_event (EV_A_ (W)w, ev);	901	ev_feed_event (EV_A_ (W)w, ev);
759	}	902	}
760	}	903	}
761		904
		905	/* do not submit kernel events for fds that have reify set */
		906	/* because that means they changed while we were polling for new events */
		907	inline_speed void
		908	fd_event (EV_P_ int fd, int revents)
		909	{
		910	ANFD *anfd = anfds + fd;
		911
		912	if (expect_true (!anfd->reify))
		913	fd_event_nc (EV_A_ fd, revents);
		914	}
		915
762	void	916	void
763	ev_feed_fd_event (EV_P_ int fd, int revents)	917	ev_feed_fd_event (EV_P_ int fd, int revents)
764	{	918	{
765	if (fd >= 0 && fd < anfdmax)	919	if (fd >= 0 && fd < anfdmax)
766	fd_event (EV_A_ fd, revents);	920	fd_event_nc (EV_A_ fd, revents);
767	}	921	}
768		922
769	/* make sure the external fd watch events are in-sync */	923	/* make sure the external fd watch events are in-sync */
770	/* with the kernel/libev internal state */	924	/* with the kernel/libev internal state */
771	inline_size void	925	inline_size void
…		…
786		940
787	#if EV_SELECT_IS_WINSOCKET	941	#if EV_SELECT_IS_WINSOCKET
788	if (events)	942	if (events)
789	{	943	{
790	unsigned long arg;	944	unsigned long arg;
791	#ifdef EV_FD_TO_WIN32_HANDLE
792	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	945	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
793	#else
794	anfd->handle = _get_osfhandle (fd);
795	#endif
796	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	946	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
797	}	947	}
798	#endif	948	#endif
799		949
800	{	950	{
…		…
843	/* check whether the given fd is atcually valid, for error recovery */	993	/* check whether the given fd is atcually valid, for error recovery */
844	inline_size int	994	inline_size int
845	fd_valid (int fd)	995	fd_valid (int fd)
846	{	996	{
847	#ifdef _WIN32	997	#ifdef _WIN32
848	return _get_osfhandle (fd) != -1;	998	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
849	#else	999	#else
850	return fcntl (fd, F_GETFD) != -1;	1000	return fcntl (fd, F_GETFD) != -1;
851	#endif	1001	#endif
852	}	1002	}
853		1003
…		…
871		1021
872	for (fd = anfdmax; fd--; )	1022	for (fd = anfdmax; fd--; )
873	if (anfds [fd].events)	1023	if (anfds [fd].events)
874	{	1024	{
875	fd_kill (EV_A_ fd);	1025	fd_kill (EV_A_ fd);
876	return;	1026	break;
877	}	1027	}
878	}	1028	}
879		1029
880	/* usually called after fork if backend needs to re-arm all fds from scratch */	1030	/* usually called after fork if backend needs to re-arm all fds from scratch */
881	static void noinline	1031	static void noinline
…		…
886	for (fd = 0; fd < anfdmax; ++fd)	1036	for (fd = 0; fd < anfdmax; ++fd)
887	if (anfds [fd].events)	1037	if (anfds [fd].events)
888	{	1038	{
889	anfds [fd].events = 0;	1039	anfds [fd].events = 0;
890	anfds [fd].emask = 0;	1040	anfds [fd].emask = 0;
891	fd_change (EV_A_ fd, EV__IOFDSET | 1);	1041	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
892	}	1042	}
893	}	1043	}
894		1044
895	/*****************************************************************************/	1045	/*****************************************************************************/
896		1046
…		…
971		1121
972	for (;;)	1122	for (;;)
973	{	1123	{
974	int c = k << 1;	1124	int c = k << 1;
975		1125
976	if (c > N + HEAP0 - 1)	1126	if (c >= N + HEAP0)
977	break;	1127	break;
978		1128
979	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])	1129	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
980	? 1 : 0;	1130	? 1 : 0;
981		1131
…		…
1017		1167
1018	/* move an element suitably so it is in a correct place */	1168	/* move an element suitably so it is in a correct place */
1019	inline_size void	1169	inline_size void
1020	adjustheap (ANHE *heap, int N, int k)	1170	adjustheap (ANHE *heap, int N, int k)
1021	{	1171	{
1022	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1172	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1023	upheap (heap, k);	1173	upheap (heap, k);
1024	else	1174	else
1025	downheap (heap, N, k);	1175	downheap (heap, N, k);
1026	}	1176	}
1027		1177
…		…
1040	/*****************************************************************************/	1190	/*****************************************************************************/
1041		1191
1042	/* associate signal watchers to a signal signal */	1192	/* associate signal watchers to a signal signal */
1043	typedef struct	1193	typedef struct
1044	{	1194	{
		1195	EV_ATOMIC_T pending;
		1196	#if EV_MULTIPLICITY
		1197	EV_P;
		1198	#endif
1045	WL head;	1199	WL head;
1046	EV_ATOMIC_T gotsig;
1047	} ANSIG;	1200	} ANSIG;
1048		1201
1049	static ANSIG *signals;	1202	static ANSIG signals [EV_NSIG - 1];
1050	static int signalmax;
1051
1052	static EV_ATOMIC_T gotsig;
1053		1203
1054	/*****************************************************************************/	1204	/*****************************************************************************/
1055		1205
1056	/* used to prepare libev internal fd's */	1206	/* used to prepare libev internal fd's */
1057	/* this is not fork-safe */	1207	/* this is not fork-safe */
1058	inline_speed void	1208	inline_speed void
1059	fd_intern (int fd)	1209	fd_intern (int fd)
1060	{	1210	{
1061	#ifdef _WIN32	1211	#ifdef _WIN32
1062	unsigned long arg = 1;	1212	unsigned long arg = 1;
1063	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1213	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1064	#else	1214	#else
1065	fcntl (fd, F_SETFD, FD_CLOEXEC);	1215	fcntl (fd, F_SETFD, FD_CLOEXEC);
1066	fcntl (fd, F_SETFL, O_NONBLOCK);	1216	fcntl (fd, F_SETFL, O_NONBLOCK);
1067	#endif	1217	#endif
1068	}	1218	}
…		…
1071	evpipe_init (EV_P)	1221	evpipe_init (EV_P)
1072	{	1222	{
1073	if (!ev_is_active (&pipe_w))	1223	if (!ev_is_active (&pipe_w))
1074	{	1224	{
1075	#if EV_USE_EVENTFD	1225	#if EV_USE_EVENTFD
		1226	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1227	if (evfd < 0 && errno == EINVAL)
1076	if ((evfd = eventfd (0, 0)) >= 0)	1228	evfd = eventfd (0, 0);
		1229
		1230	if (evfd >= 0)
1077	{	1231	{
1078	evpipe [0] = -1;	1232	evpipe [0] = -1;
1079	fd_intern (evfd);	1233	fd_intern (evfd); /* doing it twice doesn't hurt */
1080	ev_io_set (&pipe_w, evfd, EV_READ);	1234	ev_io_set (&pipe_w, evfd, EV_READ);
1081	}	1235	}
1082	else	1236	else
1083	#endif	1237	#endif
1084	{	1238	{
…		…
1121	/* called whenever the libev signal pipe */	1275	/* called whenever the libev signal pipe */
1122	/* got some events (signal, async) */	1276	/* got some events (signal, async) */
1123	static void	1277	static void
1124	pipecb (EV_P_ ev_io *iow, int revents)	1278	pipecb (EV_P_ ev_io *iow, int revents)
1125	{	1279	{
		1280	int i;
		1281
1126	#if EV_USE_EVENTFD	1282	#if EV_USE_EVENTFD
1127	if (evfd >= 0)	1283	if (evfd >= 0)
1128	{	1284	{
1129	uint64_t counter;	1285	uint64_t counter;
1130	read (evfd, &counter, sizeof (uint64_t));	1286	read (evfd, &counter, sizeof (uint64_t));
…		…
1134	{	1290	{
1135	char dummy;	1291	char dummy;
1136	read (evpipe [0], &dummy, 1);	1292	read (evpipe [0], &dummy, 1);
1137	}	1293	}
1138		1294
1139	if (gotsig && ev_is_default_loop (EV_A))	1295	if (sig_pending)
1140	{	1296	{
1141	int signum;	1297	sig_pending = 0;
1142	gotsig = 0;
1143		1298
1144	for (signum = signalmax; signum--; )	1299	for (i = EV_NSIG - 1; i--; )
1145	if (signals [signum].gotsig)	1300	if (expect_false (signals [i].pending))
1146	ev_feed_signal_event (EV_A_ signum + 1);	1301	ev_feed_signal_event (EV_A_ i + 1);
1147	}	1302	}
1148		1303
1149	#if EV_ASYNC_ENABLE	1304	#if EV_ASYNC_ENABLE
1150	if (gotasync)	1305	if (async_pending)
1151	{	1306	{
1152	int i;	1307	async_pending = 0;
1153	gotasync = 0;
1154		1308
1155	for (i = asynccnt; i--; )	1309	for (i = asynccnt; i--; )
1156	if (asyncs [i]->sent)	1310	if (asyncs [i]->sent)
1157	{	1311	{
1158	asyncs [i]->sent = 0;	1312	asyncs [i]->sent = 0;
…		…
1166		1320
1167	static void	1321	static void
1168	ev_sighandler (int signum)	1322	ev_sighandler (int signum)
1169	{	1323	{
1170	#if EV_MULTIPLICITY	1324	#if EV_MULTIPLICITY
1171	struct ev_loop *loop = &default_loop_struct;	1325	EV_P = signals [signum - 1].loop;
1172	#endif	1326	#endif
1173		1327
1174	#if _WIN32	1328	#ifdef _WIN32
1175	signal (signum, ev_sighandler);	1329	signal (signum, ev_sighandler);
1176	#endif	1330	#endif
1177		1331
1178	signals [signum - 1].gotsig = 1;	1332	signals [signum - 1].pending = 1;
1179	evpipe_write (EV_A_ &gotsig);	1333	evpipe_write (EV_A_ &sig_pending);
1180	}	1334	}
1181		1335
1182	void noinline	1336	void noinline
1183	ev_feed_signal_event (EV_P_ int signum)	1337	ev_feed_signal_event (EV_P_ int signum)
1184	{	1338	{
1185	WL w;	1339	WL w;
1186		1340
		1341	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1342	return;
		1343
		1344	--signum;
		1345
1187	#if EV_MULTIPLICITY	1346	#if EV_MULTIPLICITY
1188	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1347	/* it is permissible to try to feed a signal to the wrong loop */
1189	#endif	1348	/* or, likely more useful, feeding a signal nobody is waiting for */
1190		1349
1191	--signum;	1350	if (expect_false (signals [signum].loop != EV_A))
1192
1193	if (signum < 0 || signum >= signalmax)
1194	return;	1351	return;
		1352	#endif
1195		1353
1196	signals [signum].gotsig = 0;	1354	signals [signum].pending = 0;
1197		1355
1198	for (w = signals [signum].head; w; w = w->next)	1356	for (w = signals [signum].head; w; w = w->next)
1199	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1357	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1200	}	1358	}
		1359
		1360	#if EV_USE_SIGNALFD
		1361	static void
		1362	sigfdcb (EV_P_ ev_io *iow, int revents)
		1363	{
		1364	struct signalfd_siginfo si[2], *sip; /* these structs are big */
		1365
		1366	for (;;)
		1367	{
		1368	ssize_t res = read (sigfd, si, sizeof (si));
		1369
		1370	/* not ISO-C, as res might be -1, but works with SuS */
		1371	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		1372	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1373
		1374	if (res < (ssize_t)sizeof (si))
		1375	break;
		1376	}
		1377	}
		1378	#endif
1201		1379
1202	/*****************************************************************************/	1380	/*****************************************************************************/
1203		1381
1204	static WL childs [EV_PID_HASHSIZE];	1382	static WL childs [EV_PID_HASHSIZE];
1205		1383
…		…
1350	ev_backend (EV_P)	1528	ev_backend (EV_P)
1351	{	1529	{
1352	return backend;	1530	return backend;
1353	}	1531	}
1354		1532
		1533	#if EV_MINIMAL < 2
1355	unsigned int	1534	unsigned int
1356	ev_loop_count (EV_P)	1535	ev_loop_count (EV_P)
1357	{	1536	{
1358	return loop_count;	1537	return loop_count;
1359	}	1538	}
1360		1539
		1540	unsigned int
		1541	ev_loop_depth (EV_P)
		1542	{
		1543	return loop_depth;
		1544	}
		1545
1361	void	1546	void
1362	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1547	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1363	{	1548	{
1364	io_blocktime = interval;	1549	io_blocktime = interval;
1365	}	1550	}
…		…
1367	void	1552	void
1368	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1553	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1369	{	1554	{
1370	timeout_blocktime = interval;	1555	timeout_blocktime = interval;
1371	}	1556	}
		1557
		1558	void
		1559	ev_set_userdata (EV_P_ void *data)
		1560	{
		1561	userdata = data;
		1562	}
		1563
		1564	void *
		1565	ev_userdata (EV_P)
		1566	{
		1567	return userdata;
		1568	}
		1569
		1570	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1571	{
		1572	invoke_cb = invoke_pending_cb;
		1573	}
		1574
		1575	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1576	{
		1577	release_cb = release;
		1578	acquire_cb = acquire;
		1579	}
		1580	#endif
1372		1581
1373	/* initialise a loop structure, must be zero-initialised */	1582	/* initialise a loop structure, must be zero-initialised */
1374	static void noinline	1583	static void noinline
1375	loop_init (EV_P_ unsigned int flags)	1584	loop_init (EV_P_ unsigned int flags)
1376	{	1585	{
…		…
1394	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1603	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1395	have_monotonic = 1;	1604	have_monotonic = 1;
1396	}	1605	}
1397	#endif	1606	#endif
1398		1607
		1608	/* pid check not overridable via env */
		1609	#ifndef _WIN32
		1610	if (flags & EVFLAG_FORKCHECK)
		1611	curpid = getpid ();
		1612	#endif
		1613
		1614	if (!(flags & EVFLAG_NOENV)
		1615	&& !enable_secure ()
		1616	&& getenv ("LIBEV_FLAGS"))
		1617	flags = atoi (getenv ("LIBEV_FLAGS"));
		1618
1399	ev_rt_now = ev_time ();	1619	ev_rt_now = ev_time ();
1400	mn_now = get_clock ();	1620	mn_now = get_clock ();
1401	now_floor = mn_now;	1621	now_floor = mn_now;
1402	rtmn_diff = ev_rt_now - mn_now;	1622	rtmn_diff = ev_rt_now - mn_now;
		1623	#if EV_MINIMAL < 2
		1624	invoke_cb = ev_invoke_pending;
		1625	#endif
1403		1626
1404	io_blocktime = 0.;	1627	io_blocktime = 0.;
1405	timeout_blocktime = 0.;	1628	timeout_blocktime = 0.;
1406	backend = 0;	1629	backend = 0;
1407	backend_fd = -1;	1630	backend_fd = -1;
1408	gotasync = 0;	1631	sig_pending = 0;
		1632	#if EV_ASYNC_ENABLE
		1633	async_pending = 0;
		1634	#endif
1409	#if EV_USE_INOTIFY	1635	#if EV_USE_INOTIFY
1410	fs_fd = -2;	1636	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1411	#endif	1637	#endif
1412		1638	#if EV_USE_SIGNALFD
1413	/* pid check not overridable via env */	1639	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1414	#ifndef _WIN32
1415	if (flags & EVFLAG_FORKCHECK)
1416	curpid = getpid ();
1417	#endif	1640	#endif
1418
1419	if (!(flags & EVFLAG_NOENV)
1420	&& !enable_secure ()
1421	&& getenv ("LIBEV_FLAGS"))
1422	flags = atoi (getenv ("LIBEV_FLAGS"));
1423		1641
1424	if (!(flags & 0x0000ffffU))	1642	if (!(flags & 0x0000ffffU))
1425	flags |= ev_recommended_backends ();	1643	flags |= ev_recommended_backends ();
1426		1644
1427	#if EV_USE_PORT	1645	#if EV_USE_PORT
…		…
1453	{	1671	{
1454	int i;	1672	int i;
1455		1673
1456	if (ev_is_active (&pipe_w))	1674	if (ev_is_active (&pipe_w))
1457	{	1675	{
1458	ev_ref (EV_A); /* signal watcher */	1676	/*ev_ref (EV_A);*/
1459	ev_io_stop (EV_A_ &pipe_w);	1677	/*ev_io_stop (EV_A_ &pipe_w);*/
1460		1678
1461	#if EV_USE_EVENTFD	1679	#if EV_USE_EVENTFD
1462	if (evfd >= 0)	1680	if (evfd >= 0)
1463	close (evfd);	1681	close (evfd);
1464	#endif	1682	#endif
1465		1683
1466	if (evpipe [0] >= 0)	1684	if (evpipe [0] >= 0)
1467	{	1685	{
1468	close (evpipe [0]);	1686	EV_WIN32_CLOSE_FD (evpipe [0]);
1469	close (evpipe [1]);	1687	EV_WIN32_CLOSE_FD (evpipe [1]);
1470	}	1688	}
1471	}	1689	}
		1690
		1691	#if EV_USE_SIGNALFD
		1692	if (ev_is_active (&sigfd_w))
		1693	close (sigfd);
		1694	#endif
1472		1695
1473	#if EV_USE_INOTIFY	1696	#if EV_USE_INOTIFY
1474	if (fs_fd >= 0)	1697	if (fs_fd >= 0)
1475	close (fs_fd);	1698	close (fs_fd);
1476	#endif	1699	#endif
…		…
1500	#if EV_IDLE_ENABLE	1723	#if EV_IDLE_ENABLE
1501	array_free (idle, [i]);	1724	array_free (idle, [i]);
1502	#endif	1725	#endif
1503	}	1726	}
1504		1727
1505	ev_free (anfds); anfdmax = 0;	1728	ev_free (anfds); anfds = 0; anfdmax = 0;
1506		1729
1507	/* have to use the microsoft-never-gets-it-right macro */	1730	/* have to use the microsoft-never-gets-it-right macro */
1508	array_free (rfeed, EMPTY);	1731	array_free (rfeed, EMPTY);
1509	array_free (fdchange, EMPTY);	1732	array_free (fdchange, EMPTY);
1510	array_free (timer, EMPTY);	1733	array_free (timer, EMPTY);
…		…
1545		1768
1546	if (ev_is_active (&pipe_w))	1769	if (ev_is_active (&pipe_w))
1547	{	1770	{
1548	/* this "locks" the handlers against writing to the pipe */	1771	/* this "locks" the handlers against writing to the pipe */
1549	/* while we modify the fd vars */	1772	/* while we modify the fd vars */
1550	gotsig = 1;	1773	sig_pending = 1;
1551	#if EV_ASYNC_ENABLE	1774	#if EV_ASYNC_ENABLE
1552	gotasync = 1;	1775	async_pending = 1;
1553	#endif	1776	#endif
1554		1777
1555	ev_ref (EV_A);	1778	ev_ref (EV_A);
1556	ev_io_stop (EV_A_ &pipe_w);	1779	ev_io_stop (EV_A_ &pipe_w);
1557		1780
…		…
1560	close (evfd);	1783	close (evfd);
1561	#endif	1784	#endif
1562		1785
1563	if (evpipe [0] >= 0)	1786	if (evpipe [0] >= 0)
1564	{	1787	{
1565	close (evpipe [0]);	1788	EV_WIN32_CLOSE_FD (evpipe [0]);
1566	close (evpipe [1]);	1789	EV_WIN32_CLOSE_FD (evpipe [1]);
1567	}	1790	}
1568		1791
1569	evpipe_init (EV_A);	1792	evpipe_init (EV_A);
1570	/* now iterate over everything, in case we missed something */	1793	/* now iterate over everything, in case we missed something */
1571	pipecb (EV_A_ &pipe_w, EV_READ);	1794	pipecb (EV_A_ &pipe_w, EV_READ);
…		…
1577	#if EV_MULTIPLICITY	1800	#if EV_MULTIPLICITY
1578		1801
1579	struct ev_loop *	1802	struct ev_loop *
1580	ev_loop_new (unsigned int flags)	1803	ev_loop_new (unsigned int flags)
1581	{	1804	{
1582	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1805	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1583		1806
1584	memset (loop, 0, sizeof (struct ev_loop));	1807	memset (EV_A, 0, sizeof (struct ev_loop));
1585
1586	loop_init (EV_A_ flags);	1808	loop_init (EV_A_ flags);
1587		1809
1588	if (ev_backend (EV_A))	1810	if (ev_backend (EV_A))
1589	return loop;	1811	return EV_A;
1590		1812
1591	return 0;	1813	return 0;
1592	}	1814	}
1593		1815
1594	void	1816	void
…		…
1601	void	1823	void
1602	ev_loop_fork (EV_P)	1824	ev_loop_fork (EV_P)
1603	{	1825	{
1604	postfork = 1; /* must be in line with ev_default_fork */	1826	postfork = 1; /* must be in line with ev_default_fork */
1605	}	1827	}
		1828	#endif /* multiplicity */
1606		1829
1607	#if EV_VERIFY	1830	#if EV_VERIFY
1608	static void noinline	1831	static void noinline
1609	verify_watcher (EV_P_ W w)	1832	verify_watcher (EV_P_ W w)
1610	{	1833	{
…		…
1638	verify_watcher (EV_A_ ws [cnt]);	1861	verify_watcher (EV_A_ ws [cnt]);
1639	}	1862	}
1640	}	1863	}
1641	#endif	1864	#endif
1642		1865
		1866	#if EV_MINIMAL < 2
1643	void	1867	void
1644	ev_loop_verify (EV_P)	1868	ev_loop_verify (EV_P)
1645	{	1869	{
1646	#if EV_VERIFY	1870	#if EV_VERIFY
1647	int i;	1871	int i;
…		…
1696	assert (checkmax >= checkcnt);	1920	assert (checkmax >= checkcnt);
1697	array_verify (EV_A_ (W *)checks, checkcnt);	1921	array_verify (EV_A_ (W *)checks, checkcnt);
1698		1922
1699	# if 0	1923	# if 0
1700	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1924	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1701	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)	1925	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1702	# endif
1703	#endif	1926	# endif
		1927	#endif
1704	}	1928	}
1705		1929	#endif
1706	#endif /* multiplicity */
1707		1930
1708	#if EV_MULTIPLICITY	1931	#if EV_MULTIPLICITY
1709	struct ev_loop *	1932	struct ev_loop *
1710	ev_default_loop_init (unsigned int flags)	1933	ev_default_loop_init (unsigned int flags)
1711	#else	1934	#else
…		…
1714	#endif	1937	#endif
1715	{	1938	{
1716	if (!ev_default_loop_ptr)	1939	if (!ev_default_loop_ptr)
1717	{	1940	{
1718	#if EV_MULTIPLICITY	1941	#if EV_MULTIPLICITY
1719	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1942	EV_P = ev_default_loop_ptr = &default_loop_struct;
1720	#else	1943	#else
1721	ev_default_loop_ptr = 1;	1944	ev_default_loop_ptr = 1;
1722	#endif	1945	#endif
1723		1946
1724	loop_init (EV_A_ flags);	1947	loop_init (EV_A_ flags);
…		…
1741		1964
1742	void	1965	void
1743	ev_default_destroy (void)	1966	ev_default_destroy (void)
1744	{	1967	{
1745	#if EV_MULTIPLICITY	1968	#if EV_MULTIPLICITY
1746	struct ev_loop *loop = ev_default_loop_ptr;	1969	EV_P = ev_default_loop_ptr;
1747	#endif	1970	#endif
1748		1971
1749	ev_default_loop_ptr = 0;	1972	ev_default_loop_ptr = 0;
1750		1973
1751	#ifndef _WIN32	1974	#ifndef _WIN32
…		…
1758		1981
1759	void	1982	void
1760	ev_default_fork (void)	1983	ev_default_fork (void)
1761	{	1984	{
1762	#if EV_MULTIPLICITY	1985	#if EV_MULTIPLICITY
1763	struct ev_loop *loop = ev_default_loop_ptr;	1986	EV_P = ev_default_loop_ptr;
1764	#endif	1987	#endif
1765		1988
1766	postfork = 1; /* must be in line with ev_loop_fork */	1989	postfork = 1; /* must be in line with ev_loop_fork */
1767	}	1990	}
1768		1991
…		…
1772	ev_invoke (EV_P_ void *w, int revents)	1995	ev_invoke (EV_P_ void *w, int revents)
1773	{	1996	{
1774	EV_CB_INVOKE ((W)w, revents);	1997	EV_CB_INVOKE ((W)w, revents);
1775	}	1998	}
1776		1999
1777	inline_speed void	2000	unsigned int
1778	call_pending (EV_P)	2001	ev_pending_count (EV_P)
		2002	{
		2003	int pri;
		2004	unsigned int count = 0;
		2005
		2006	for (pri = NUMPRI; pri--; )
		2007	count += pendingcnt [pri];
		2008
		2009	return count;
		2010	}
		2011
		2012	void noinline
		2013	ev_invoke_pending (EV_P)
1779	{	2014	{
1780	int pri;	2015	int pri;
1781		2016
1782	for (pri = NUMPRI; pri--; )	2017	for (pri = NUMPRI; pri--; )
1783	while (pendingcnt [pri])	2018	while (pendingcnt [pri])
…		…
1951	ANHE_at_cache (*he);	2186	ANHE_at_cache (*he);
1952	}	2187	}
1953	}	2188	}
1954		2189
1955	/* fetch new monotonic and realtime times from the kernel */	2190	/* fetch new monotonic and realtime times from the kernel */
1956	/* also detetc if there was a timejump, and act accordingly */	2191	/* also detect if there was a timejump, and act accordingly */
1957	inline_speed void	2192	inline_speed void
1958	time_update (EV_P_ ev_tstamp max_block)	2193	time_update (EV_P_ ev_tstamp max_block)
1959	{	2194	{
1960	#if EV_USE_MONOTONIC	2195	#if EV_USE_MONOTONIC
1961	if (expect_true (have_monotonic))	2196	if (expect_true (have_monotonic))
…		…
2018		2253
2019	mn_now = ev_rt_now;	2254	mn_now = ev_rt_now;
2020	}	2255	}
2021	}	2256	}
2022		2257
2023	static int loop_done;
2024
2025	void	2258	void
2026	ev_loop (EV_P_ int flags)	2259	ev_loop (EV_P_ int flags)
2027	{	2260	{
		2261	#if EV_MINIMAL < 2
		2262	++loop_depth;
		2263	#endif
		2264
		2265	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
		2266
2028	loop_done = EVUNLOOP_CANCEL;	2267	loop_done = EVUNLOOP_CANCEL;
2029		2268
2030	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2269	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2031		2270
2032	do	2271	do
2033	{	2272	{
2034	#if EV_VERIFY >= 2	2273	#if EV_VERIFY >= 2
2035	ev_loop_verify (EV_A);	2274	ev_loop_verify (EV_A);
…		…
2048	/* we might have forked, so queue fork handlers */	2287	/* we might have forked, so queue fork handlers */
2049	if (expect_false (postfork))	2288	if (expect_false (postfork))
2050	if (forkcnt)	2289	if (forkcnt)
2051	{	2290	{
2052	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2291	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2053	call_pending (EV_A);	2292	EV_INVOKE_PENDING;
2054	}	2293	}
2055	#endif	2294	#endif
2056		2295
2057	/* queue prepare watchers (and execute them) */	2296	/* queue prepare watchers (and execute them) */
2058	if (expect_false (preparecnt))	2297	if (expect_false (preparecnt))
2059	{	2298	{
2060	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2299	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2061	call_pending (EV_A);	2300	EV_INVOKE_PENDING;
2062	}	2301	}
		2302
		2303	if (expect_false (loop_done))
		2304	break;
2063		2305
2064	/* we might have forked, so reify kernel state if necessary */	2306	/* we might have forked, so reify kernel state if necessary */
2065	if (expect_false (postfork))	2307	if (expect_false (postfork))
2066	loop_fork (EV_A);	2308	loop_fork (EV_A);
2067		2309
…		…
2073	ev_tstamp waittime = 0.;	2315	ev_tstamp waittime = 0.;
2074	ev_tstamp sleeptime = 0.;	2316	ev_tstamp sleeptime = 0.;
2075		2317
2076	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2318	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2077	{	2319	{
		2320	/* remember old timestamp for io_blocktime calculation */
		2321	ev_tstamp prev_mn_now = mn_now;
		2322
2078	/* update time to cancel out callback processing overhead */	2323	/* update time to cancel out callback processing overhead */
2079	time_update (EV_A_ 1e100);	2324	time_update (EV_A_ 1e100);
2080		2325
2081	waittime = MAX_BLOCKTIME;	2326	waittime = MAX_BLOCKTIME;
2082		2327
…		…
2092	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2337	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2093	if (waittime > to) waittime = to;	2338	if (waittime > to) waittime = to;
2094	}	2339	}
2095	#endif	2340	#endif
2096		2341
		2342	/* don't let timeouts decrease the waittime below timeout_blocktime */
2097	if (expect_false (waittime < timeout_blocktime))	2343	if (expect_false (waittime < timeout_blocktime))
2098	waittime = timeout_blocktime;	2344	waittime = timeout_blocktime;
2099		2345
2100	sleeptime = waittime - backend_fudge;	2346	/* extra check because io_blocktime is commonly 0 */
2101
2102	if (expect_true (sleeptime > io_blocktime))	2347	if (expect_false (io_blocktime))
2103	sleeptime = io_blocktime;
2104
2105	if (sleeptime)
2106	{	2348	{
		2349	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2350
		2351	if (sleeptime > waittime - backend_fudge)
		2352	sleeptime = waittime - backend_fudge;
		2353
		2354	if (expect_true (sleeptime > 0.))
		2355	{
2107	ev_sleep (sleeptime);	2356	ev_sleep (sleeptime);
2108	waittime -= sleeptime;	2357	waittime -= sleeptime;
		2358	}
2109	}	2359	}
2110	}	2360	}
2111		2361
		2362	#if EV_MINIMAL < 2
2112	++loop_count;	2363	++loop_count;
		2364	#endif
		2365	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2113	backend_poll (EV_A_ waittime);	2366	backend_poll (EV_A_ waittime);
		2367	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2114		2368
2115	/* update ev_rt_now, do magic */	2369	/* update ev_rt_now, do magic */
2116	time_update (EV_A_ waittime + sleeptime);	2370	time_update (EV_A_ waittime + sleeptime);
2117	}	2371	}
2118		2372
…		…
2129		2383
2130	/* queue check watchers, to be executed first */	2384	/* queue check watchers, to be executed first */
2131	if (expect_false (checkcnt))	2385	if (expect_false (checkcnt))
2132	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2386	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2133		2387
2134	call_pending (EV_A);	2388	EV_INVOKE_PENDING;
2135	}	2389	}
2136	while (expect_true (	2390	while (expect_true (
2137	activecnt	2391	activecnt
2138	&& !loop_done	2392	&& !loop_done
2139	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2393	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2140	));	2394	));
2141		2395
2142	if (loop_done == EVUNLOOP_ONE)	2396	if (loop_done == EVUNLOOP_ONE)
2143	loop_done = EVUNLOOP_CANCEL;	2397	loop_done = EVUNLOOP_CANCEL;
		2398
		2399	#if EV_MINIMAL < 2
		2400	--loop_depth;
		2401	#endif
2144	}	2402	}
2145		2403
2146	void	2404	void
2147	ev_unloop (EV_P_ int how)	2405	ev_unloop (EV_P_ int how)
2148	{	2406	{
…		…
2199	inline_size void	2457	inline_size void
2200	wlist_del (WL *head, WL elem)	2458	wlist_del (WL *head, WL elem)
2201	{	2459	{
2202	while (*head)	2460	while (*head)
2203	{	2461	{
2204	if (*head == elem)	2462	if (expect_true (*head == elem))
2205	{	2463	{
2206	*head = elem->next;	2464	*head = elem->next;
2207	return;	2465	break;
2208	}	2466	}
2209		2467
2210	head = &(*head)->next;	2468	head = &(*head)->next;
2211	}	2469	}
2212	}	2470	}
…		…
2240	}	2498	}
2241		2499
2242	inline_size void	2500	inline_size void
2243	pri_adjust (EV_P_ W w)	2501	pri_adjust (EV_P_ W w)
2244	{	2502	{
2245	int pri = w->priority;	2503	int pri = ev_priority (w);
2246	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2504	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2247	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2505	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2248	w->priority = pri;	2506	ev_set_priority (w, pri);
2249	}	2507	}
2250		2508
2251	inline_speed void	2509	inline_speed void
2252	ev_start (EV_P_ W w, int active)	2510	ev_start (EV_P_ W w, int active)
2253	{	2511	{
…		…
2272		2530
2273	if (expect_false (ev_is_active (w)))	2531	if (expect_false (ev_is_active (w)))
2274	return;	2532	return;
2275		2533
2276	assert (("libev: ev_io_start called with negative fd", fd >= 0));	2534	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2277	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));	2535	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2278		2536
2279	EV_FREQUENT_CHECK;	2537	EV_FREQUENT_CHECK;
2280		2538
2281	ev_start (EV_A_ (W)w, 1);	2539	ev_start (EV_A_ (W)w, 1);
2282	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2540	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2283	wlist_add (&anfds[fd].head, (WL)w);	2541	wlist_add (&anfds[fd].head, (WL)w);
2284		2542
2285	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);	2543	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2286	w->events &= ~EV__IOFDSET;	2544	w->events &= ~EV__IOFDSET;
2287		2545
2288	EV_FREQUENT_CHECK;	2546	EV_FREQUENT_CHECK;
2289	}	2547	}
2290		2548
…		…
2352	timers [active] = timers [timercnt + HEAP0];	2610	timers [active] = timers [timercnt + HEAP0];
2353	adjustheap (timers, timercnt, active);	2611	adjustheap (timers, timercnt, active);
2354	}	2612	}
2355	}	2613	}
2356		2614
2357	EV_FREQUENT_CHECK;
2358
2359	ev_at (w) -= mn_now;	2615	ev_at (w) -= mn_now;
2360		2616
2361	ev_stop (EV_A_ (W)w);	2617	ev_stop (EV_A_ (W)w);
		2618
		2619	EV_FREQUENT_CHECK;
2362	}	2620	}
2363		2621
2364	void noinline	2622	void noinline
2365	ev_timer_again (EV_P_ ev_timer *w)	2623	ev_timer_again (EV_P_ ev_timer *w)
2366	{	2624	{
…		…
2384	}	2642	}
2385		2643
2386	EV_FREQUENT_CHECK;	2644	EV_FREQUENT_CHECK;
2387	}	2645	}
2388		2646
		2647	ev_tstamp
		2648	ev_timer_remaining (EV_P_ ev_timer *w)
		2649	{
		2650	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2651	}
		2652
2389	#if EV_PERIODIC_ENABLE	2653	#if EV_PERIODIC_ENABLE
2390	void noinline	2654	void noinline
2391	ev_periodic_start (EV_P_ ev_periodic *w)	2655	ev_periodic_start (EV_P_ ev_periodic *w)
2392	{	2656	{
2393	if (expect_false (ev_is_active (w)))	2657	if (expect_false (ev_is_active (w)))
…		…
2439	periodics [active] = periodics [periodiccnt + HEAP0];	2703	periodics [active] = periodics [periodiccnt + HEAP0];
2440	adjustheap (periodics, periodiccnt, active);	2704	adjustheap (periodics, periodiccnt, active);
2441	}	2705	}
2442	}	2706	}
2443		2707
2444	EV_FREQUENT_CHECK;
2445
2446	ev_stop (EV_A_ (W)w);	2708	ev_stop (EV_A_ (W)w);
		2709
		2710	EV_FREQUENT_CHECK;
2447	}	2711	}
2448		2712
2449	void noinline	2713	void noinline
2450	ev_periodic_again (EV_P_ ev_periodic *w)	2714	ev_periodic_again (EV_P_ ev_periodic *w)
2451	{	2715	{
…		…
2460	#endif	2724	#endif
2461		2725
2462	void noinline	2726	void noinline
2463	ev_signal_start (EV_P_ ev_signal *w)	2727	ev_signal_start (EV_P_ ev_signal *w)
2464	{	2728	{
2465	#if EV_MULTIPLICITY
2466	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2467	#endif
2468	if (expect_false (ev_is_active (w)))	2729	if (expect_false (ev_is_active (w)))
2469	return;	2730	return;
2470		2731
2471	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));	2732	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2472		2733
2473	evpipe_init (EV_A);	2734	#if EV_MULTIPLICITY
		2735	assert (("libev: a signal must not be attached to two different loops",
		2736	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2474		2737
2475	EV_FREQUENT_CHECK;	2738	signals [w->signum - 1].loop = EV_A;
		2739	#endif
2476		2740
		2741	EV_FREQUENT_CHECK;
		2742
		2743	#if EV_USE_SIGNALFD
		2744	if (sigfd == -2)
2477	{	2745	{
2478	#ifndef _WIN32	2746	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2479	sigset_t full, prev;	2747	if (sigfd < 0 && errno == EINVAL)
2480	sigfillset (&full);	2748	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2481	sigprocmask (SIG_SETMASK, &full, &prev);
2482	#endif
2483		2749
2484	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);	2750	if (sigfd >= 0)
		2751	{
		2752	fd_intern (sigfd); /* doing it twice will not hurt */
2485		2753
2486	#ifndef _WIN32	2754	sigemptyset (&sigfd_set);
2487	sigprocmask (SIG_SETMASK, &prev, 0);	2755
2488	#endif	2756	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2757	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2758	ev_io_start (EV_A_ &sigfd_w);
		2759	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2760	}
2489	}	2761	}
		2762
		2763	if (sigfd >= 0)
		2764	{
		2765	/* TODO: check .head */
		2766	sigaddset (&sigfd_set, w->signum);
		2767	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2768
		2769	signalfd (sigfd, &sigfd_set, 0);
		2770	}
		2771	#endif
2490		2772
2491	ev_start (EV_A_ (W)w, 1);	2773	ev_start (EV_A_ (W)w, 1);
2492	wlist_add (&signals [w->signum - 1].head, (WL)w);	2774	wlist_add (&signals [w->signum - 1].head, (WL)w);
2493		2775
2494	if (!((WL)w)->next)	2776	if (!((WL)w)->next)
		2777	# if EV_USE_SIGNALFD
		2778	if (sigfd < 0) /*TODO*/
		2779	# endif
2495	{	2780	{
2496	#if _WIN32	2781	# ifdef _WIN32
		2782	evpipe_init (EV_A);
		2783
2497	signal (w->signum, ev_sighandler);	2784	signal (w->signum, ev_sighandler);
2498	#else	2785	# else
2499	struct sigaction sa;	2786	struct sigaction sa;
		2787
		2788	evpipe_init (EV_A);
		2789
2500	sa.sa_handler = ev_sighandler;	2790	sa.sa_handler = ev_sighandler;
2501	sigfillset (&sa.sa_mask);	2791	sigfillset (&sa.sa_mask);
2502	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2792	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2503	sigaction (w->signum, &sa, 0);	2793	sigaction (w->signum, &sa, 0);
		2794
		2795	sigemptyset (&sa.sa_mask);
		2796	sigaddset (&sa.sa_mask, w->signum);
		2797	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2504	#endif	2798	#endif
2505	}	2799	}
2506		2800
2507	EV_FREQUENT_CHECK;	2801	EV_FREQUENT_CHECK;
2508	}	2802	}
2509		2803
2510	void noinline	2804	void noinline
…		…
2518		2812
2519	wlist_del (&signals [w->signum - 1].head, (WL)w);	2813	wlist_del (&signals [w->signum - 1].head, (WL)w);
2520	ev_stop (EV_A_ (W)w);	2814	ev_stop (EV_A_ (W)w);
2521		2815
2522	if (!signals [w->signum - 1].head)	2816	if (!signals [w->signum - 1].head)
		2817	{
		2818	#if EV_MULTIPLICITY
		2819	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2820	#endif
		2821	#if EV_USE_SIGNALFD
		2822	if (sigfd >= 0)
		2823	{
		2824	sigset_t ss;
		2825
		2826	sigemptyset (&ss);
		2827	sigaddset (&ss, w->signum);
		2828	sigdelset (&sigfd_set, w->signum);
		2829
		2830	signalfd (sigfd, &sigfd_set, 0);
		2831	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2832	}
		2833	else
		2834	#endif
2523	signal (w->signum, SIG_DFL);	2835	signal (w->signum, SIG_DFL);
		2836	}
2524		2837
2525	EV_FREQUENT_CHECK;	2838	EV_FREQUENT_CHECK;
2526	}	2839	}
2527		2840
2528	void	2841	void
…		…
2569	#define MIN_STAT_INTERVAL 0.1074891	2882	#define MIN_STAT_INTERVAL 0.1074891
2570		2883
2571	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2884	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2572		2885
2573	#if EV_USE_INOTIFY	2886	#if EV_USE_INOTIFY
2574	# define EV_INOTIFY_BUFSIZE 8192	2887
		2888	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2889	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2575		2890
2576	static void noinline	2891	static void noinline
2577	infy_add (EV_P_ ev_stat *w)	2892	infy_add (EV_P_ ev_stat *w)
2578	{	2893	{
2579	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);	2894	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);
2580		2895
2581	if (w->wd < 0)	2896	if (w->wd >= 0)
		2897	{
		2898	struct statfs sfs;
		2899
		2900	/* now local changes will be tracked by inotify, but remote changes won't */
		2901	/* unless the filesystem is known to be local, we therefore still poll */
		2902	/* also do poll on <2.6.25, but with normal frequency */
		2903
		2904	if (!fs_2625)
		2905	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2906	else if (!statfs (w->path, &sfs)
		2907	&& (sfs.f_type == 0x1373 /* devfs */
		2908	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2909	|| sfs.f_type == 0x3153464a /* jfs */
		2910	|| sfs.f_type == 0x52654973 /* reiser3 */
		2911	|| sfs.f_type == 0x01021994 /* tempfs */
		2912	|| sfs.f_type == 0x58465342 /* xfs */))
		2913	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		2914	else
		2915	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2582	{	2916	}
		2917	else
		2918	{
		2919	/* can't use inotify, continue to stat */
2583	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;	2920	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2584	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2585		2921
2586	/* monitor some parent directory for speedup hints */	2922	/* if path is not there, monitor some parent directory for speedup hints */
2587	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2923	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2588	/* but an efficiency issue only */	2924	/* but an efficiency issue only */
2589	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2925	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2590	{	2926	{
2591	char path [4096];	2927	char path [4096];
…		…
2607	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2943	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2608	}	2944	}
2609	}	2945	}
2610		2946
2611	if (w->wd >= 0)	2947	if (w->wd >= 0)
2612	{
2613	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2948	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2614		2949
2615	/* now local changes will be tracked by inotify, but remote changes won't */	2950	/* now re-arm timer, if required */
2616	/* unless the filesystem it known to be local, we therefore still poll */	2951	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2617	/* also do poll on <2.6.25, but with normal frequency */
2618	struct statfs sfs;
2619
2620	if (fs_2625 && !statfs (w->path, &sfs))
2621	if (sfs.f_type == 0x1373 /* devfs */
2622	|| sfs.f_type == 0xEF53 /* ext2/3 */
2623	|| sfs.f_type == 0x3153464a /* jfs */
2624	|| sfs.f_type == 0x52654973 /* reiser3 */
2625	|| sfs.f_type == 0x01021994 /* tempfs */
2626	|| sfs.f_type == 0x58465342 /* xfs */)
2627	return;
2628
2629	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2630	ev_timer_again (EV_A_ &w->timer);	2952	ev_timer_again (EV_A_ &w->timer);
2631	}	2953	if (ev_is_active (&w->timer)) ev_unref (EV_A);
2632	}	2954	}
2633		2955
2634	static void noinline	2956	static void noinline
2635	infy_del (EV_P_ ev_stat *w)	2957	infy_del (EV_P_ ev_stat *w)
2636	{	2958	{
…		…
2681		3003
2682	static void	3004	static void
2683	infy_cb (EV_P_ ev_io *w, int revents)	3005	infy_cb (EV_P_ ev_io *w, int revents)
2684	{	3006	{
2685	char buf [EV_INOTIFY_BUFSIZE];	3007	char buf [EV_INOTIFY_BUFSIZE];
2686	struct inotify_event *ev = (struct inotify_event *)buf;
2687	int ofs;	3008	int ofs;
2688	int len = read (fs_fd, buf, sizeof (buf));	3009	int len = read (fs_fd, buf, sizeof (buf));
2689		3010
2690	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	3011	for (ofs = 0; ofs < len; )
		3012	{
		3013	struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2691	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3014	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3015	ofs += sizeof (struct inotify_event) + ev->len;
		3016	}
		3017	}
		3018
		3019	inline_size unsigned int
		3020	ev_linux_version (void)
		3021	{
		3022	struct utsname buf;
		3023	unsigned int v;
		3024	int i;
		3025	char *p = buf.release;
		3026
		3027	if (uname (&buf))
		3028	return 0;
		3029
		3030	for (i = 3+1; --i; )
		3031	{
		3032	unsigned int c = 0;
		3033
		3034	for (;;)
		3035	{
		3036	if (*p >= '0' && *p <= '9')
		3037	c = c * 10 + *p++ - '0';
		3038	else
		3039	{
		3040	p += *p == '.';
		3041	break;
		3042	}
		3043	}
		3044
		3045	v = (v << 8) | c;
		3046	}
		3047
		3048	return v;
2692	}	3049	}
2693		3050
2694	inline_size void	3051	inline_size void
2695	check_2625 (EV_P)	3052	ev_check_2625 (EV_P)
2696	{	3053	{
2697	/* kernels < 2.6.25 are borked	3054	/* kernels < 2.6.25 are borked
2698	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3055	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2699	*/	3056	*/
2700	struct utsname buf;	3057	if (ev_linux_version () < 0x020619)
2701	int major, minor, micro;
2702
2703	if (uname (&buf))
2704	return;	3058	return;
2705		3059
2706	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2707	return;
2708
2709	if (major < 2
2710	|| (major == 2 && minor < 6)
2711	|| (major == 2 && minor == 6 && micro < 25))
2712	return;
2713
2714	fs_2625 = 1;	3060	fs_2625 = 1;
		3061	}
		3062
		3063	inline_size int
		3064	infy_newfd (void)
		3065	{
		3066	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3067	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		3068	if (fd >= 0)
		3069	return fd;
		3070	#endif
		3071	return inotify_init ();
2715	}	3072	}
2716		3073
2717	inline_size void	3074	inline_size void
2718	infy_init (EV_P)	3075	infy_init (EV_P)
2719	{	3076	{
2720	if (fs_fd != -2)	3077	if (fs_fd != -2)
2721	return;	3078	return;
2722		3079
2723	fs_fd = -1;	3080	fs_fd = -1;
2724		3081
2725	check_2625 (EV_A);	3082	ev_check_2625 (EV_A);
2726		3083
2727	fs_fd = inotify_init ();	3084	fs_fd = infy_newfd ();
2728		3085
2729	if (fs_fd >= 0)	3086	if (fs_fd >= 0)
2730	{	3087	{
		3088	fd_intern (fs_fd);
2731	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3089	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2732	ev_set_priority (&fs_w, EV_MAXPRI);	3090	ev_set_priority (&fs_w, EV_MAXPRI);
2733	ev_io_start (EV_A_ &fs_w);	3091	ev_io_start (EV_A_ &fs_w);
		3092	ev_unref (EV_A);
2734	}	3093	}
2735	}	3094	}
2736		3095
2737	inline_size void	3096	inline_size void
2738	infy_fork (EV_P)	3097	infy_fork (EV_P)
…		…
2740	int slot;	3099	int slot;
2741		3100
2742	if (fs_fd < 0)	3101	if (fs_fd < 0)
2743	return;	3102	return;
2744		3103
		3104	ev_ref (EV_A);
		3105	ev_io_stop (EV_A_ &fs_w);
2745	close (fs_fd);	3106	close (fs_fd);
2746	fs_fd = inotify_init ();	3107	fs_fd = infy_newfd ();
		3108
		3109	if (fs_fd >= 0)
		3110	{
		3111	fd_intern (fs_fd);
		3112	ev_io_set (&fs_w, fs_fd, EV_READ);
		3113	ev_io_start (EV_A_ &fs_w);
		3114	ev_unref (EV_A);
		3115	}
2747		3116
2748	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3117	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2749	{	3118	{
2750	WL w_ = fs_hash [slot].head;	3119	WL w_ = fs_hash [slot].head;
2751	fs_hash [slot].head = 0;	3120	fs_hash [slot].head = 0;
…		…
2758	w->wd = -1;	3127	w->wd = -1;
2759		3128
2760	if (fs_fd >= 0)	3129	if (fs_fd >= 0)
2761	infy_add (EV_A_ w); /* re-add, no matter what */	3130	infy_add (EV_A_ w); /* re-add, no matter what */
2762	else	3131	else
		3132	{
		3133	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3134	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2763	ev_timer_again (EV_A_ &w->timer);	3135	ev_timer_again (EV_A_ &w->timer);
		3136	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3137	}
2764	}	3138	}
2765	}	3139	}
2766	}	3140	}
2767		3141
2768	#endif	3142	#endif
…		…
2785	static void noinline	3159	static void noinline
2786	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3160	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2787	{	3161	{
2788	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));	3162	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2789		3163
2790	/* we copy this here each the time so that */	3164	ev_statdata prev = w->attr;
2791	/* prev has the old value when the callback gets invoked */
2792	w->prev = w->attr;
2793	ev_stat_stat (EV_A_ w);	3165	ev_stat_stat (EV_A_ w);
2794		3166
2795	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3167	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2796	if (	3168	if (
2797	w->prev.st_dev != w->attr.st_dev	3169	prev.st_dev != w->attr.st_dev
2798	|| w->prev.st_ino != w->attr.st_ino	3170	|| prev.st_ino != w->attr.st_ino
2799	|| w->prev.st_mode != w->attr.st_mode	3171	|| prev.st_mode != w->attr.st_mode
2800	|| w->prev.st_nlink != w->attr.st_nlink	3172	|| prev.st_nlink != w->attr.st_nlink
2801	|| w->prev.st_uid != w->attr.st_uid	3173	|| prev.st_uid != w->attr.st_uid
2802	|| w->prev.st_gid != w->attr.st_gid	3174	|| prev.st_gid != w->attr.st_gid
2803	|| w->prev.st_rdev != w->attr.st_rdev	3175	|| prev.st_rdev != w->attr.st_rdev
2804	|| w->prev.st_size != w->attr.st_size	3176	|| prev.st_size != w->attr.st_size
2805	|| w->prev.st_atime != w->attr.st_atime	3177	|| prev.st_atime != w->attr.st_atime
2806	|| w->prev.st_mtime != w->attr.st_mtime	3178	|| prev.st_mtime != w->attr.st_mtime
2807	|| w->prev.st_ctime != w->attr.st_ctime	3179	|| prev.st_ctime != w->attr.st_ctime
2808	) {	3180	) {
		3181	/* we only update w->prev on actual differences */
		3182	/* in case we test more often than invoke the callback, */
		3183	/* to ensure that prev is always different to attr */
		3184	w->prev = prev;
		3185
2809	#if EV_USE_INOTIFY	3186	#if EV_USE_INOTIFY
2810	if (fs_fd >= 0)	3187	if (fs_fd >= 0)
2811	{	3188	{
2812	infy_del (EV_A_ w);	3189	infy_del (EV_A_ w);
2813	infy_add (EV_A_ w);	3190	infy_add (EV_A_ w);
…		…
2838		3215
2839	if (fs_fd >= 0)	3216	if (fs_fd >= 0)
2840	infy_add (EV_A_ w);	3217	infy_add (EV_A_ w);
2841	else	3218	else
2842	#endif	3219	#endif
		3220	{
2843	ev_timer_again (EV_A_ &w->timer);	3221	ev_timer_again (EV_A_ &w->timer);
		3222	ev_unref (EV_A);
		3223	}
2844		3224
2845	ev_start (EV_A_ (W)w, 1);	3225	ev_start (EV_A_ (W)w, 1);
2846		3226
2847	EV_FREQUENT_CHECK;	3227	EV_FREQUENT_CHECK;
2848	}	3228	}
…		…
2857	EV_FREQUENT_CHECK;	3237	EV_FREQUENT_CHECK;
2858		3238
2859	#if EV_USE_INOTIFY	3239	#if EV_USE_INOTIFY
2860	infy_del (EV_A_ w);	3240	infy_del (EV_A_ w);
2861	#endif	3241	#endif
		3242
		3243	if (ev_is_active (&w->timer))
		3244	{
		3245	ev_ref (EV_A);
2862	ev_timer_stop (EV_A_ &w->timer);	3246	ev_timer_stop (EV_A_ &w->timer);
		3247	}
2863		3248
2864	ev_stop (EV_A_ (W)w);	3249	ev_stop (EV_A_ (W)w);
2865		3250
2866	EV_FREQUENT_CHECK;	3251	EV_FREQUENT_CHECK;
2867	}	3252	}
…		…
3008	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3393	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3009	{	3394	{
3010	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));	3395	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3011		3396
3012	{	3397	{
3013	struct ev_loop *loop = w->other;	3398	EV_P = w->other;
3014		3399
3015	while (fdchangecnt)	3400	while (fdchangecnt)
3016	{	3401	{
3017	fd_reify (EV_A);	3402	fd_reify (EV_A);
3018	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3403	ev_loop (EV_A_ EVLOOP_NONBLOCK);
…		…
3026	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3411	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3027		3412
3028	ev_embed_stop (EV_A_ w);	3413	ev_embed_stop (EV_A_ w);
3029		3414
3030	{	3415	{
3031	struct ev_loop *loop = w->other;	3416	EV_P = w->other;
3032		3417
3033	ev_loop_fork (EV_A);	3418	ev_loop_fork (EV_A);
3034	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3419	ev_loop (EV_A_ EVLOOP_NONBLOCK);
3035	}	3420	}
3036		3421
…		…
3050	{	3435	{
3051	if (expect_false (ev_is_active (w)))	3436	if (expect_false (ev_is_active (w)))
3052	return;	3437	return;
3053		3438
3054	{	3439	{
3055	struct ev_loop *loop = w->other;	3440	EV_P = w->other;
3056	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3441	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3057	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3442	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3058	}	3443	}
3059		3444
3060	EV_FREQUENT_CHECK;	3445	EV_FREQUENT_CHECK;
…		…
3087		3472
3088	ev_io_stop (EV_A_ &w->io);	3473	ev_io_stop (EV_A_ &w->io);
3089	ev_prepare_stop (EV_A_ &w->prepare);	3474	ev_prepare_stop (EV_A_ &w->prepare);
3090	ev_fork_stop (EV_A_ &w->fork);	3475	ev_fork_stop (EV_A_ &w->fork);
3091		3476
		3477	ev_stop (EV_A_ (W)w);
		3478
3092	EV_FREQUENT_CHECK;	3479	EV_FREQUENT_CHECK;
3093	}	3480	}
3094	#endif	3481	#endif
3095		3482
3096	#if EV_FORK_ENABLE	3483	#if EV_FORK_ENABLE
…		…
3172		3559
3173	void	3560	void
3174	ev_async_send (EV_P_ ev_async *w)	3561	ev_async_send (EV_P_ ev_async *w)
3175	{	3562	{
3176	w->sent = 1;	3563	w->sent = 1;
3177	evpipe_write (EV_A_ &gotasync);	3564	evpipe_write (EV_A_ &async_pending);
3178	}	3565	}
3179	#endif	3566	#endif
3180		3567
3181	/*****************************************************************************/	3568	/*****************************************************************************/
3182		3569
…		…
3331	if (types & EV_CHECK)	3718	if (types & EV_CHECK)
3332	for (i = checkcnt; i--; )	3719	for (i = checkcnt; i--; )
3333	cb (EV_A_ EV_CHECK, checks [i]);	3720	cb (EV_A_ EV_CHECK, checks [i]);
3334		3721
3335	if (types & EV_SIGNAL)	3722	if (types & EV_SIGNAL)
3336	for (i = 0; i < signalmax; ++i)	3723	for (i = 0; i < EV_NSIG - 1; ++i)
3337	for (wl = signals [i].head; wl; )	3724	for (wl = signals [i].head; wl; )
3338	{	3725	{
3339	wn = wl->next;	3726	wn = wl->next;
3340	cb (EV_A_ EV_SIGNAL, wl);	3727	cb (EV_A_ EV_SIGNAL, wl);
3341	wl = wn;	3728	wl = wn;

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