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Comparing libev/ev.c (file contents):
Revision 1.289 by root, Sat Jun 6 11:13:16 2009 UTC vs.
Revision 1.334 by root, Tue Mar 9 09:00:59 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
…		…
172	# define WIN32_LEAN_AND_MEAN	184	# define WIN32_LEAN_AND_MEAN
173	# include <windows.h>	185	# include <windows.h>
174	# ifndef EV_SELECT_IS_WINSOCKET	186	# ifndef EV_SELECT_IS_WINSOCKET
175	# define EV_SELECT_IS_WINSOCKET 1	187	# define EV_SELECT_IS_WINSOCKET 1
176	# endif	188	# endif
		189	# undef EV_AVOID_STDIO
177	#endif	190	#endif
178		191
179	/* 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
180		220
181	#ifndef EV_USE_CLOCK_SYSCALL	221	#ifndef EV_USE_CLOCK_SYSCALL
182	# if __linux && __GLIBC__ >= 2	222	# if __linux && __GLIBC__ >= 2
183	# define EV_USE_CLOCK_SYSCALL 1	223	# define EV_USE_CLOCK_SYSCALL 1
184	# else	224	# else
…		…
264	# else	304	# else
265	# define EV_USE_EVENTFD 0	305	# define EV_USE_EVENTFD 0
266	# endif	306	# endif
267	#endif	307	#endif
268		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
269	#if 0 /* debugging */	317	#if 0 /* debugging */
270	# define EV_VERIFY 3	318	# define EV_VERIFY 3
271	# define EV_USE_4HEAP 1	319	# define EV_USE_4HEAP 1
272	# define EV_HEAP_CACHE_AT 1	320	# define EV_HEAP_CACHE_AT 1
273	#endif	321	#endif
…		…
282		330
283	#ifndef EV_HEAP_CACHE_AT	331	#ifndef EV_HEAP_CACHE_AT
284	# define EV_HEAP_CACHE_AT !EV_MINIMAL	332	# define EV_HEAP_CACHE_AT !EV_MINIMAL
285	#endif	333	#endif
286		334
		335	/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
		336	/* which makes programs even slower. might work on other unices, too. */
		337	#if EV_USE_CLOCK_SYSCALL
		338	# include <syscall.h>
		339	# ifdef SYS_clock_gettime
		340	# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
		341	# undef EV_USE_MONOTONIC
		342	# define EV_USE_MONOTONIC 1
		343	# else
		344	# undef EV_USE_CLOCK_SYSCALL
		345	# define EV_USE_CLOCK_SYSCALL 0
		346	# endif
		347	#endif
		348
287	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	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
288		356
289	#ifndef CLOCK_MONOTONIC	357	#ifndef CLOCK_MONOTONIC
290	# undef EV_USE_MONOTONIC	358	# undef EV_USE_MONOTONIC
291	# define EV_USE_MONOTONIC 0	359	# define EV_USE_MONOTONIC 0
292	#endif	360	#endif
…		…
320		388
321	#if EV_SELECT_IS_WINSOCKET	389	#if EV_SELECT_IS_WINSOCKET
322	# include <winsock.h>	390	# include <winsock.h>
323	#endif	391	#endif
324		392
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	393	#if EV_USE_EVENTFD
335	/* 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 */
336	# 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
337	# ifdef __cplusplus	406	# ifdef __cplusplus
338	extern "C" {	407	extern "C" {
339	# endif	408	# endif
340	int eventfd (unsigned int initval, int flags);	409	int (eventfd) (unsigned int initval, int flags);
341	# ifdef __cplusplus	410	# ifdef __cplusplus
342	}	411	}
343	# endif	412	# endif
344	#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
345		443
346	/**/	444	/**/
347		445
348	#if EV_VERIFY >= 3	446	#if EV_VERIFY >= 3
349	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	447	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
…		…
361	*/	459	*/
362	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	460	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
363		461
364	#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) */
365	#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) */
366	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
367		464
368	#if __GNUC__ >= 4	465	#if __GNUC__ >= 4
369	# define expect(expr,value) __builtin_expect ((expr),(value))	466	# define expect(expr,value) __builtin_expect ((expr),(value))
370	# define noinline __attribute__ ((noinline))	467	# define noinline __attribute__ ((noinline))
371	#else	468	#else
…		…
384	# define inline_speed static noinline	481	# define inline_speed static noinline
385	#else	482	#else
386	# define inline_speed static inline	483	# define inline_speed static inline
387	#endif	484	#endif
388		485
389	#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
390	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	491	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		492	#endif
391		493
392	#define EMPTY /* required for microsofts broken pseudo-c compiler */	494	#define EMPTY /* required for microsofts broken pseudo-c compiler */
393	#define EMPTY2(a,b) /* used to suppress some warnings */	495	#define EMPTY2(a,b) /* used to suppress some warnings */
394		496
395	typedef ev_watcher *W;	497	typedef ev_watcher *W;
…		…
407		509
408	#if EV_USE_MONOTONIC	510	#if EV_USE_MONOTONIC
409	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? */
410	#endif	512	#endif
411		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
412	#ifdef _WIN32	524	#ifdef _WIN32
413	# include "ev_win32.c"	525	# include "ev_win32.c"
414	#endif	526	#endif
415		527
416	/*****************************************************************************/	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
417		537
418	static void (*syserr_cb)(const char *msg);	538	static void (*syserr_cb)(const char *msg);
419		539
420	void	540	void
421	ev_set_syserr_cb (void (*cb)(const char *msg))	541	ev_set_syserr_cb (void (*cb)(const char *msg))
…		…
431		551
432	if (syserr_cb)	552	if (syserr_cb)
433	syserr_cb (msg);	553	syserr_cb (msg);
434	else	554	else
435	{	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
436	perror (msg);	564	perror (msg);
		565	#endif
437	abort ();	566	abort ();
438	}	567	}
439	}	568	}
440		569
441	static void *	570	static void *
442	ev_realloc_emul (void *ptr, long size)	571	ev_realloc_emul (void *ptr, long size)
443	{	572	{
		573	#if __GLIBC__
		574	return realloc (ptr, size);
		575	#else
444	/* some systems, notably openbsd and darwin, fail to properly	576	/* some systems, notably openbsd and darwin, fail to properly
445	* implement realloc (x, 0) (as required by both ansi c-98 and	577	* implement realloc (x, 0) (as required by both ansi c-98 and
446	* the single unix specification, so work around them here.	578	* the single unix specification, so work around them here.
447	*/	579	*/
448		580
449	if (size)	581	if (size)
450	return realloc (ptr, size);	582	return realloc (ptr, size);
451		583
452	free (ptr);	584	free (ptr);
453	return 0;	585	return 0;
		586	#endif
454	}	587	}
455		588
456	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;	589	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
457		590
458	void	591	void
…		…
466	{	599	{
467	ptr = alloc (ptr, size);	600	ptr = alloc (ptr, size);
468		601
469	if (!ptr && size)	602	if (!ptr && size)
470	{	603	{
		604	#if EV_AVOID_STDIO
		605	ev_printerr ("libev: memory allocation failed, aborting.\n");
		606	#else
471	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	607	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		608	#endif
472	abort ();	609	abort ();
473	}	610	}
474		611
475	return ptr;	612	return ptr;
476	}	613	}
…		…
478	#define ev_malloc(size) ev_realloc (0, (size))	615	#define ev_malloc(size) ev_realloc (0, (size))
479	#define ev_free(ptr) ev_realloc ((ptr), 0)	616	#define ev_free(ptr) ev_realloc ((ptr), 0)
480		617
481	/*****************************************************************************/	618	/*****************************************************************************/
482		619
		620	/* set in reify when reification needed */
		621	#define EV_ANFD_REIFY 1
		622
483	/* file descriptor info structure */	623	/* file descriptor info structure */
484	typedef struct	624	typedef struct
485	{	625	{
486	WL head;	626	WL head;
487	unsigned char events; /* the events watched for */	627	unsigned char events; /* the events watched for */
488	unsigned char reify; /* flag set when this ANFD needs reification */	628	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 */	629	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
490	unsigned char unused;	630	unsigned char unused;
491	#if EV_USE_EPOLL	631	#if EV_USE_EPOLL
492	unsigned int egen; /* generation counter to counter epoll bugs */	632	unsigned int egen; /* generation counter to counter epoll bugs */
493	#endif	633	#endif
…		…
555		695
556	static int ev_default_loop_ptr;	696	static int ev_default_loop_ptr;
557		697
558	#endif	698	#endif
559		699
		700	#if EV_MINIMAL < 2
		701	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		702	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		703	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		704	#else
		705	# define EV_RELEASE_CB (void)0
		706	# define EV_ACQUIRE_CB (void)0
		707	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		708	#endif
		709
		710	#define EVUNLOOP_RECURSE 0x80
		711
560	/*****************************************************************************/	712	/*****************************************************************************/
561		713
		714	#ifndef EV_HAVE_EV_TIME
562	ev_tstamp	715	ev_tstamp
563	ev_time (void)	716	ev_time (void)
564	{	717	{
565	#if EV_USE_REALTIME	718	#if EV_USE_REALTIME
566	if (expect_true (have_realtime))	719	if (expect_true (have_realtime))
…		…
573		726
574	struct timeval tv;	727	struct timeval tv;
575	gettimeofday (&tv, 0);	728	gettimeofday (&tv, 0);
576	return tv.tv_sec + tv.tv_usec * 1e-6;	729	return tv.tv_sec + tv.tv_usec * 1e-6;
577	}	730	}
		731	#endif
578		732
579	inline_size ev_tstamp	733	inline_size ev_tstamp
580	get_clock (void)	734	get_clock (void)
581	{	735	{
582	#if EV_USE_MONOTONIC	736	#if EV_USE_MONOTONIC
…		…
618		772
619	tv.tv_sec = (time_t)delay;	773	tv.tv_sec = (time_t)delay;
620	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	774	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
621		775
622	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	776	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
623	/* somehting nto guaranteed by newer posix versions, but guaranteed */	777	/* something not guaranteed by newer posix versions, but guaranteed */
624	/* by older ones */	778	/* by older ones */
625	select (0, 0, 0, 0, &tv);	779	select (0, 0, 0, 0, &tv);
626	#endif	780	#endif
627	}	781	}
628	}	782	}
…		…
736	}	890	}
737		891
738	/*****************************************************************************/	892	/*****************************************************************************/
739		893
740	inline_speed void	894	inline_speed void
741	fd_event (EV_P_ int fd, int revents)	895	fd_event_nc (EV_P_ int fd, int revents)
742	{	896	{
743	ANFD *anfd = anfds + fd;	897	ANFD *anfd = anfds + fd;
744	ev_io *w;	898	ev_io *w;
745		899
746	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	900	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
750	if (ev)	904	if (ev)
751	ev_feed_event (EV_A_ (W)w, ev);	905	ev_feed_event (EV_A_ (W)w, ev);
752	}	906	}
753	}	907	}
754		908
		909	/* do not submit kernel events for fds that have reify set */
		910	/* because that means they changed while we were polling for new events */
		911	inline_speed void
		912	fd_event (EV_P_ int fd, int revents)
		913	{
		914	ANFD *anfd = anfds + fd;
		915
		916	if (expect_true (!anfd->reify))
		917	fd_event_nc (EV_A_ fd, revents);
		918	}
		919
755	void	920	void
756	ev_feed_fd_event (EV_P_ int fd, int revents)	921	ev_feed_fd_event (EV_P_ int fd, int revents)
757	{	922	{
758	if (fd >= 0 && fd < anfdmax)	923	if (fd >= 0 && fd < anfdmax)
759	fd_event (EV_A_ fd, revents);	924	fd_event_nc (EV_A_ fd, revents);
760	}	925	}
761		926
762	/* make sure the external fd watch events are in-sync */	927	/* make sure the external fd watch events are in-sync */
763	/* with the kernel/libev internal state */	928	/* with the kernel/libev internal state */
764	inline_size void	929	inline_size void
…		…
779		944
780	#if EV_SELECT_IS_WINSOCKET	945	#if EV_SELECT_IS_WINSOCKET
781	if (events)	946	if (events)
782	{	947	{
783	unsigned long arg;	948	unsigned long arg;
784	#ifdef EV_FD_TO_WIN32_HANDLE
785	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	949	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));	950	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
790	}	951	}
791	#endif	952	#endif
792		953
793	{	954	{
…		…
836	/* check whether the given fd is atcually valid, for error recovery */	997	/* check whether the given fd is atcually valid, for error recovery */
837	inline_size int	998	inline_size int
838	fd_valid (int fd)	999	fd_valid (int fd)
839	{	1000	{
840	#ifdef _WIN32	1001	#ifdef _WIN32
841	return _get_osfhandle (fd) != -1;	1002	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
842	#else	1003	#else
843	return fcntl (fd, F_GETFD) != -1;	1004	return fcntl (fd, F_GETFD) != -1;
844	#endif	1005	#endif
845	}	1006	}
846		1007
…		…
864		1025
865	for (fd = anfdmax; fd--; )	1026	for (fd = anfdmax; fd--; )
866	if (anfds [fd].events)	1027	if (anfds [fd].events)
867	{	1028	{
868	fd_kill (EV_A_ fd);	1029	fd_kill (EV_A_ fd);
869	return;	1030	break;
870	}	1031	}
871	}	1032	}
872		1033
873	/* usually called after fork if backend needs to re-arm all fds from scratch */	1034	/* usually called after fork if backend needs to re-arm all fds from scratch */
874	static void noinline	1035	static void noinline
…		…
879	for (fd = 0; fd < anfdmax; ++fd)	1040	for (fd = 0; fd < anfdmax; ++fd)
880	if (anfds [fd].events)	1041	if (anfds [fd].events)
881	{	1042	{
882	anfds [fd].events = 0;	1043	anfds [fd].events = 0;
883	anfds [fd].emask = 0;	1044	anfds [fd].emask = 0;
884	fd_change (EV_A_ fd, EV__IOFDSET | 1);	1045	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
885	}	1046	}
886	}	1047	}
887		1048
888	/*****************************************************************************/	1049	/*****************************************************************************/
889		1050
…		…
964		1125
965	for (;;)	1126	for (;;)
966	{	1127	{
967	int c = k << 1;	1128	int c = k << 1;
968		1129
969	if (c > N + HEAP0 - 1)	1130	if (c >= N + HEAP0)
970	break;	1131	break;
971		1132
972	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])	1133	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
973	? 1 : 0;	1134	? 1 : 0;
974		1135
…		…
1010		1171
1011	/* move an element suitably so it is in a correct place */	1172	/* move an element suitably so it is in a correct place */
1012	inline_size void	1173	inline_size void
1013	adjustheap (ANHE *heap, int N, int k)	1174	adjustheap (ANHE *heap, int N, int k)
1014	{	1175	{
1015	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1176	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1016	upheap (heap, k);	1177	upheap (heap, k);
1017	else	1178	else
1018	downheap (heap, N, k);	1179	downheap (heap, N, k);
1019	}	1180	}
1020		1181
…		…
1033	/*****************************************************************************/	1194	/*****************************************************************************/
1034		1195
1035	/* associate signal watchers to a signal signal */	1196	/* associate signal watchers to a signal signal */
1036	typedef struct	1197	typedef struct
1037	{	1198	{
		1199	EV_ATOMIC_T pending;
		1200	#if EV_MULTIPLICITY
		1201	EV_P;
		1202	#endif
1038	WL head;	1203	WL head;
1039	EV_ATOMIC_T gotsig;
1040	} ANSIG;	1204	} ANSIG;
1041		1205
1042	static ANSIG *signals;	1206	static ANSIG signals [EV_NSIG - 1];
1043	static int signalmax;
1044
1045	static EV_ATOMIC_T gotsig;
1046		1207
1047	/*****************************************************************************/	1208	/*****************************************************************************/
1048		1209
1049	/* used to prepare libev internal fd's */	1210	/* used to prepare libev internal fd's */
1050	/* this is not fork-safe */	1211	/* this is not fork-safe */
1051	inline_speed void	1212	inline_speed void
1052	fd_intern (int fd)	1213	fd_intern (int fd)
1053	{	1214	{
1054	#ifdef _WIN32	1215	#ifdef _WIN32
1055	unsigned long arg = 1;	1216	unsigned long arg = 1;
1056	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1217	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1057	#else	1218	#else
1058	fcntl (fd, F_SETFD, FD_CLOEXEC);	1219	fcntl (fd, F_SETFD, FD_CLOEXEC);
1059	fcntl (fd, F_SETFL, O_NONBLOCK);	1220	fcntl (fd, F_SETFL, O_NONBLOCK);
1060	#endif	1221	#endif
1061	}	1222	}
…		…
1064	evpipe_init (EV_P)	1225	evpipe_init (EV_P)
1065	{	1226	{
1066	if (!ev_is_active (&pipe_w))	1227	if (!ev_is_active (&pipe_w))
1067	{	1228	{
1068	#if EV_USE_EVENTFD	1229	#if EV_USE_EVENTFD
		1230	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1231	if (evfd < 0 && errno == EINVAL)
1069	if ((evfd = eventfd (0, 0)) >= 0)	1232	evfd = eventfd (0, 0);
		1233
		1234	if (evfd >= 0)
1070	{	1235	{
1071	evpipe [0] = -1;	1236	evpipe [0] = -1;
1072	fd_intern (evfd);	1237	fd_intern (evfd); /* doing it twice doesn't hurt */
1073	ev_io_set (&pipe_w, evfd, EV_READ);	1238	ev_io_set (&pipe_w, evfd, EV_READ);
1074	}	1239	}
1075	else	1240	else
1076	#endif	1241	#endif
1077	{	1242	{
…		…
1114	/* called whenever the libev signal pipe */	1279	/* called whenever the libev signal pipe */
1115	/* got some events (signal, async) */	1280	/* got some events (signal, async) */
1116	static void	1281	static void
1117	pipecb (EV_P_ ev_io *iow, int revents)	1282	pipecb (EV_P_ ev_io *iow, int revents)
1118	{	1283	{
		1284	int i;
		1285
1119	#if EV_USE_EVENTFD	1286	#if EV_USE_EVENTFD
1120	if (evfd >= 0)	1287	if (evfd >= 0)
1121	{	1288	{
1122	uint64_t counter;	1289	uint64_t counter;
1123	read (evfd, &counter, sizeof (uint64_t));	1290	read (evfd, &counter, sizeof (uint64_t));
…		…
1127	{	1294	{
1128	char dummy;	1295	char dummy;
1129	read (evpipe [0], &dummy, 1);	1296	read (evpipe [0], &dummy, 1);
1130	}	1297	}
1131		1298
1132	if (gotsig && ev_is_default_loop (EV_A))	1299	if (sig_pending)
1133	{	1300	{
1134	int signum;	1301	sig_pending = 0;
1135	gotsig = 0;
1136		1302
1137	for (signum = signalmax; signum--; )	1303	for (i = EV_NSIG - 1; i--; )
1138	if (signals [signum].gotsig)	1304	if (expect_false (signals [i].pending))
1139	ev_feed_signal_event (EV_A_ signum + 1);	1305	ev_feed_signal_event (EV_A_ i + 1);
1140	}	1306	}
1141		1307
1142	#if EV_ASYNC_ENABLE	1308	#if EV_ASYNC_ENABLE
1143	if (gotasync)	1309	if (async_pending)
1144	{	1310	{
1145	int i;	1311	async_pending = 0;
1146	gotasync = 0;
1147		1312
1148	for (i = asynccnt; i--; )	1313	for (i = asynccnt; i--; )
1149	if (asyncs [i]->sent)	1314	if (asyncs [i]->sent)
1150	{	1315	{
1151	asyncs [i]->sent = 0;	1316	asyncs [i]->sent = 0;
…		…
1159		1324
1160	static void	1325	static void
1161	ev_sighandler (int signum)	1326	ev_sighandler (int signum)
1162	{	1327	{
1163	#if EV_MULTIPLICITY	1328	#if EV_MULTIPLICITY
1164	struct ev_loop *loop = &default_loop_struct;	1329	EV_P = signals [signum - 1].loop;
1165	#endif	1330	#endif
1166		1331
1167	#if _WIN32	1332	#ifdef _WIN32
1168	signal (signum, ev_sighandler);	1333	signal (signum, ev_sighandler);
1169	#endif	1334	#endif
1170		1335
1171	signals [signum - 1].gotsig = 1;	1336	signals [signum - 1].pending = 1;
1172	evpipe_write (EV_A_ &gotsig);	1337	evpipe_write (EV_A_ &sig_pending);
1173	}	1338	}
1174		1339
1175	void noinline	1340	void noinline
1176	ev_feed_signal_event (EV_P_ int signum)	1341	ev_feed_signal_event (EV_P_ int signum)
1177	{	1342	{
1178	WL w;	1343	WL w;
1179		1344
		1345	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1346	return;
		1347
		1348	--signum;
		1349
1180	#if EV_MULTIPLICITY	1350	#if EV_MULTIPLICITY
1181	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1351	/* it is permissible to try to feed a signal to the wrong loop */
1182	#endif	1352	/* or, likely more useful, feeding a signal nobody is waiting for */
1183		1353
1184	--signum;	1354	if (expect_false (signals [signum].loop != EV_A))
1185
1186	if (signum < 0 || signum >= signalmax)
1187	return;	1355	return;
		1356	#endif
1188		1357
1189	signals [signum].gotsig = 0;	1358	signals [signum].pending = 0;
1190		1359
1191	for (w = signals [signum].head; w; w = w->next)	1360	for (w = signals [signum].head; w; w = w->next)
1192	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1361	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1193	}	1362	}
		1363
		1364	#if EV_USE_SIGNALFD
		1365	static void
		1366	sigfdcb (EV_P_ ev_io *iow, int revents)
		1367	{
		1368	struct signalfd_siginfo si[2], *sip; /* these structs are big */
		1369
		1370	for (;;)
		1371	{
		1372	ssize_t res = read (sigfd, si, sizeof (si));
		1373
		1374	/* not ISO-C, as res might be -1, but works with SuS */
		1375	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		1376	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1377
		1378	if (res < (ssize_t)sizeof (si))
		1379	break;
		1380	}
		1381	}
		1382	#endif
1194		1383
1195	/*****************************************************************************/	1384	/*****************************************************************************/
1196		1385
1197	static WL childs [EV_PID_HASHSIZE];	1386	static WL childs [EV_PID_HASHSIZE];
1198		1387
…		…
1343	ev_backend (EV_P)	1532	ev_backend (EV_P)
1344	{	1533	{
1345	return backend;	1534	return backend;
1346	}	1535	}
1347		1536
		1537	#if EV_MINIMAL < 2
1348	unsigned int	1538	unsigned int
1349	ev_loop_count (EV_P)	1539	ev_loop_count (EV_P)
1350	{	1540	{
1351	return loop_count;	1541	return loop_count;
1352	}	1542	}
1353		1543
		1544	unsigned int
		1545	ev_loop_depth (EV_P)
		1546	{
		1547	return loop_depth;
		1548	}
		1549
1354	void	1550	void
1355	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1551	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1356	{	1552	{
1357	io_blocktime = interval;	1553	io_blocktime = interval;
1358	}	1554	}
…		…
1360	void	1556	void
1361	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1557	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1362	{	1558	{
1363	timeout_blocktime = interval;	1559	timeout_blocktime = interval;
1364	}	1560	}
		1561
		1562	void
		1563	ev_set_userdata (EV_P_ void *data)
		1564	{
		1565	userdata = data;
		1566	}
		1567
		1568	void *
		1569	ev_userdata (EV_P)
		1570	{
		1571	return userdata;
		1572	}
		1573
		1574	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1575	{
		1576	invoke_cb = invoke_pending_cb;
		1577	}
		1578
		1579	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1580	{
		1581	release_cb = release;
		1582	acquire_cb = acquire;
		1583	}
		1584	#endif
1365		1585
1366	/* initialise a loop structure, must be zero-initialised */	1586	/* initialise a loop structure, must be zero-initialised */
1367	static void noinline	1587	static void noinline
1368	loop_init (EV_P_ unsigned int flags)	1588	loop_init (EV_P_ unsigned int flags)
1369	{	1589	{
…		…
1387	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1607	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1388	have_monotonic = 1;	1608	have_monotonic = 1;
1389	}	1609	}
1390	#endif	1610	#endif
1391		1611
		1612	/* pid check not overridable via env */
		1613	#ifndef _WIN32
		1614	if (flags & EVFLAG_FORKCHECK)
		1615	curpid = getpid ();
		1616	#endif
		1617
		1618	if (!(flags & EVFLAG_NOENV)
		1619	&& !enable_secure ()
		1620	&& getenv ("LIBEV_FLAGS"))
		1621	flags = atoi (getenv ("LIBEV_FLAGS"));
		1622
1392	ev_rt_now = ev_time ();	1623	ev_rt_now = ev_time ();
1393	mn_now = get_clock ();	1624	mn_now = get_clock ();
1394	now_floor = mn_now;	1625	now_floor = mn_now;
1395	rtmn_diff = ev_rt_now - mn_now;	1626	rtmn_diff = ev_rt_now - mn_now;
		1627	#if EV_MINIMAL < 2
		1628	invoke_cb = ev_invoke_pending;
		1629	#endif
1396		1630
1397	io_blocktime = 0.;	1631	io_blocktime = 0.;
1398	timeout_blocktime = 0.;	1632	timeout_blocktime = 0.;
1399	backend = 0;	1633	backend = 0;
1400	backend_fd = -1;	1634	backend_fd = -1;
1401	gotasync = 0;	1635	sig_pending = 0;
		1636	#if EV_ASYNC_ENABLE
		1637	async_pending = 0;
		1638	#endif
1402	#if EV_USE_INOTIFY	1639	#if EV_USE_INOTIFY
1403	fs_fd = -2;	1640	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1404	#endif	1641	#endif
1405		1642	#if EV_USE_SIGNALFD
1406	/* pid check not overridable via env */	1643	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1407	#ifndef _WIN32
1408	if (flags & EVFLAG_FORKCHECK)
1409	curpid = getpid ();
1410	#endif	1644	#endif
1411
1412	if (!(flags & EVFLAG_NOENV)
1413	&& !enable_secure ()
1414	&& getenv ("LIBEV_FLAGS"))
1415	flags = atoi (getenv ("LIBEV_FLAGS"));
1416		1645
1417	if (!(flags & 0x0000ffffU))	1646	if (!(flags & 0x0000ffffU))
1418	flags |= ev_recommended_backends ();	1647	flags |= ev_recommended_backends ();
1419		1648
1420	#if EV_USE_PORT	1649	#if EV_USE_PORT
…		…
1446	{	1675	{
1447	int i;	1676	int i;
1448		1677
1449	if (ev_is_active (&pipe_w))	1678	if (ev_is_active (&pipe_w))
1450	{	1679	{
1451	ev_ref (EV_A); /* signal watcher */	1680	/*ev_ref (EV_A);*/
1452	ev_io_stop (EV_A_ &pipe_w);	1681	/*ev_io_stop (EV_A_ &pipe_w);*/
1453		1682
1454	#if EV_USE_EVENTFD	1683	#if EV_USE_EVENTFD
1455	if (evfd >= 0)	1684	if (evfd >= 0)
1456	close (evfd);	1685	close (evfd);
1457	#endif	1686	#endif
1458		1687
1459	if (evpipe [0] >= 0)	1688	if (evpipe [0] >= 0)
1460	{	1689	{
1461	close (evpipe [0]);	1690	EV_WIN32_CLOSE_FD (evpipe [0]);
1462	close (evpipe [1]);	1691	EV_WIN32_CLOSE_FD (evpipe [1]);
1463	}	1692	}
1464	}	1693	}
		1694
		1695	#if EV_USE_SIGNALFD
		1696	if (ev_is_active (&sigfd_w))
		1697	close (sigfd);
		1698	#endif
1465		1699
1466	#if EV_USE_INOTIFY	1700	#if EV_USE_INOTIFY
1467	if (fs_fd >= 0)	1701	if (fs_fd >= 0)
1468	close (fs_fd);	1702	close (fs_fd);
1469	#endif	1703	#endif
…		…
1493	#if EV_IDLE_ENABLE	1727	#if EV_IDLE_ENABLE
1494	array_free (idle, [i]);	1728	array_free (idle, [i]);
1495	#endif	1729	#endif
1496	}	1730	}
1497		1731
1498	ev_free (anfds); anfdmax = 0;	1732	ev_free (anfds); anfds = 0; anfdmax = 0;
1499		1733
1500	/* have to use the microsoft-never-gets-it-right macro */	1734	/* have to use the microsoft-never-gets-it-right macro */
1501	array_free (rfeed, EMPTY);	1735	array_free (rfeed, EMPTY);
1502	array_free (fdchange, EMPTY);	1736	array_free (fdchange, EMPTY);
1503	array_free (timer, EMPTY);	1737	array_free (timer, EMPTY);
…		…
1538		1772
1539	if (ev_is_active (&pipe_w))	1773	if (ev_is_active (&pipe_w))
1540	{	1774	{
1541	/* this "locks" the handlers against writing to the pipe */	1775	/* this "locks" the handlers against writing to the pipe */
1542	/* while we modify the fd vars */	1776	/* while we modify the fd vars */
1543	gotsig = 1;	1777	sig_pending = 1;
1544	#if EV_ASYNC_ENABLE	1778	#if EV_ASYNC_ENABLE
1545	gotasync = 1;	1779	async_pending = 1;
1546	#endif	1780	#endif
1547		1781
1548	ev_ref (EV_A);	1782	ev_ref (EV_A);
1549	ev_io_stop (EV_A_ &pipe_w);	1783	ev_io_stop (EV_A_ &pipe_w);
1550		1784
…		…
1553	close (evfd);	1787	close (evfd);
1554	#endif	1788	#endif
1555		1789
1556	if (evpipe [0] >= 0)	1790	if (evpipe [0] >= 0)
1557	{	1791	{
1558	close (evpipe [0]);	1792	EV_WIN32_CLOSE_FD (evpipe [0]);
1559	close (evpipe [1]);	1793	EV_WIN32_CLOSE_FD (evpipe [1]);
1560	}	1794	}
1561		1795
1562	evpipe_init (EV_A);	1796	evpipe_init (EV_A);
1563	/* now iterate over everything, in case we missed something */	1797	/* now iterate over everything, in case we missed something */
1564	pipecb (EV_A_ &pipe_w, EV_READ);	1798	pipecb (EV_A_ &pipe_w, EV_READ);
…		…
1570	#if EV_MULTIPLICITY	1804	#if EV_MULTIPLICITY
1571		1805
1572	struct ev_loop *	1806	struct ev_loop *
1573	ev_loop_new (unsigned int flags)	1807	ev_loop_new (unsigned int flags)
1574	{	1808	{
1575	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1809	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1576		1810
1577	memset (loop, 0, sizeof (struct ev_loop));	1811	memset (EV_A, 0, sizeof (struct ev_loop));
1578
1579	loop_init (EV_A_ flags);	1812	loop_init (EV_A_ flags);
1580		1813
1581	if (ev_backend (EV_A))	1814	if (ev_backend (EV_A))
1582	return loop;	1815	return EV_A;
1583		1816
1584	return 0;	1817	return 0;
1585	}	1818	}
1586		1819
1587	void	1820	void
…		…
1594	void	1827	void
1595	ev_loop_fork (EV_P)	1828	ev_loop_fork (EV_P)
1596	{	1829	{
1597	postfork = 1; /* must be in line with ev_default_fork */	1830	postfork = 1; /* must be in line with ev_default_fork */
1598	}	1831	}
		1832	#endif /* multiplicity */
1599		1833
1600	#if EV_VERIFY	1834	#if EV_VERIFY
1601	static void noinline	1835	static void noinline
1602	verify_watcher (EV_P_ W w)	1836	verify_watcher (EV_P_ W w)
1603	{	1837	{
…		…
1631	verify_watcher (EV_A_ ws [cnt]);	1865	verify_watcher (EV_A_ ws [cnt]);
1632	}	1866	}
1633	}	1867	}
1634	#endif	1868	#endif
1635		1869
		1870	#if EV_MINIMAL < 2
1636	void	1871	void
1637	ev_loop_verify (EV_P)	1872	ev_loop_verify (EV_P)
1638	{	1873	{
1639	#if EV_VERIFY	1874	#if EV_VERIFY
1640	int i;	1875	int i;
…		…
1689	assert (checkmax >= checkcnt);	1924	assert (checkmax >= checkcnt);
1690	array_verify (EV_A_ (W *)checks, checkcnt);	1925	array_verify (EV_A_ (W *)checks, checkcnt);
1691		1926
1692	# if 0	1927	# if 0
1693	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1928	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)	1929	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1695	# endif
1696	#endif	1930	# endif
		1931	#endif
1697	}	1932	}
1698		1933	#endif
1699	#endif /* multiplicity */
1700		1934
1701	#if EV_MULTIPLICITY	1935	#if EV_MULTIPLICITY
1702	struct ev_loop *	1936	struct ev_loop *
1703	ev_default_loop_init (unsigned int flags)	1937	ev_default_loop_init (unsigned int flags)
1704	#else	1938	#else
…		…
1707	#endif	1941	#endif
1708	{	1942	{
1709	if (!ev_default_loop_ptr)	1943	if (!ev_default_loop_ptr)
1710	{	1944	{
1711	#if EV_MULTIPLICITY	1945	#if EV_MULTIPLICITY
1712	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1946	EV_P = ev_default_loop_ptr = &default_loop_struct;
1713	#else	1947	#else
1714	ev_default_loop_ptr = 1;	1948	ev_default_loop_ptr = 1;
1715	#endif	1949	#endif
1716		1950
1717	loop_init (EV_A_ flags);	1951	loop_init (EV_A_ flags);
…		…
1734		1968
1735	void	1969	void
1736	ev_default_destroy (void)	1970	ev_default_destroy (void)
1737	{	1971	{
1738	#if EV_MULTIPLICITY	1972	#if EV_MULTIPLICITY
1739	struct ev_loop *loop = ev_default_loop_ptr;	1973	EV_P = ev_default_loop_ptr;
1740	#endif	1974	#endif
1741		1975
1742	ev_default_loop_ptr = 0;	1976	ev_default_loop_ptr = 0;
1743		1977
1744	#ifndef _WIN32	1978	#ifndef _WIN32
…		…
1751		1985
1752	void	1986	void
1753	ev_default_fork (void)	1987	ev_default_fork (void)
1754	{	1988	{
1755	#if EV_MULTIPLICITY	1989	#if EV_MULTIPLICITY
1756	struct ev_loop *loop = ev_default_loop_ptr;	1990	EV_P = ev_default_loop_ptr;
1757	#endif	1991	#endif
1758		1992
1759	postfork = 1; /* must be in line with ev_loop_fork */	1993	postfork = 1; /* must be in line with ev_loop_fork */
1760	}	1994	}
1761		1995
…		…
1765	ev_invoke (EV_P_ void *w, int revents)	1999	ev_invoke (EV_P_ void *w, int revents)
1766	{	2000	{
1767	EV_CB_INVOKE ((W)w, revents);	2001	EV_CB_INVOKE ((W)w, revents);
1768	}	2002	}
1769		2003
1770	inline_speed void	2004	unsigned int
1771	call_pending (EV_P)	2005	ev_pending_count (EV_P)
		2006	{
		2007	int pri;
		2008	unsigned int count = 0;
		2009
		2010	for (pri = NUMPRI; pri--; )
		2011	count += pendingcnt [pri];
		2012
		2013	return count;
		2014	}
		2015
		2016	void noinline
		2017	ev_invoke_pending (EV_P)
1772	{	2018	{
1773	int pri;	2019	int pri;
1774		2020
1775	for (pri = NUMPRI; pri--; )	2021	for (pri = NUMPRI; pri--; )
1776	while (pendingcnt [pri])	2022	while (pendingcnt [pri])
…		…
1944	ANHE_at_cache (*he);	2190	ANHE_at_cache (*he);
1945	}	2191	}
1946	}	2192	}
1947		2193
1948	/* fetch new monotonic and realtime times from the kernel */	2194	/* fetch new monotonic and realtime times from the kernel */
1949	/* also detetc if there was a timejump, and act accordingly */	2195	/* also detect if there was a timejump, and act accordingly */
1950	inline_speed void	2196	inline_speed void
1951	time_update (EV_P_ ev_tstamp max_block)	2197	time_update (EV_P_ ev_tstamp max_block)
1952	{	2198	{
1953	#if EV_USE_MONOTONIC	2199	#if EV_USE_MONOTONIC
1954	if (expect_true (have_monotonic))	2200	if (expect_true (have_monotonic))
…		…
2011		2257
2012	mn_now = ev_rt_now;	2258	mn_now = ev_rt_now;
2013	}	2259	}
2014	}	2260	}
2015		2261
2016	static int loop_done;
2017
2018	void	2262	void
2019	ev_loop (EV_P_ int flags)	2263	ev_loop (EV_P_ int flags)
2020	{	2264	{
		2265	#if EV_MINIMAL < 2
		2266	++loop_depth;
		2267	#endif
		2268
		2269	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
		2270
2021	loop_done = EVUNLOOP_CANCEL;	2271	loop_done = EVUNLOOP_CANCEL;
2022		2272
2023	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2273	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2024		2274
2025	do	2275	do
2026	{	2276	{
2027	#if EV_VERIFY >= 2	2277	#if EV_VERIFY >= 2
2028	ev_loop_verify (EV_A);	2278	ev_loop_verify (EV_A);
…		…
2041	/* we might have forked, so queue fork handlers */	2291	/* we might have forked, so queue fork handlers */
2042	if (expect_false (postfork))	2292	if (expect_false (postfork))
2043	if (forkcnt)	2293	if (forkcnt)
2044	{	2294	{
2045	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2295	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2046	call_pending (EV_A);	2296	EV_INVOKE_PENDING;
2047	}	2297	}
2048	#endif	2298	#endif
2049		2299
2050	/* queue prepare watchers (and execute them) */	2300	/* queue prepare watchers (and execute them) */
2051	if (expect_false (preparecnt))	2301	if (expect_false (preparecnt))
2052	{	2302	{
2053	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2303	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2054	call_pending (EV_A);	2304	EV_INVOKE_PENDING;
2055	}	2305	}
		2306
		2307	if (expect_false (loop_done))
		2308	break;
2056		2309
2057	/* we might have forked, so reify kernel state if necessary */	2310	/* we might have forked, so reify kernel state if necessary */
2058	if (expect_false (postfork))	2311	if (expect_false (postfork))
2059	loop_fork (EV_A);	2312	loop_fork (EV_A);
2060		2313
…		…
2066	ev_tstamp waittime = 0.;	2319	ev_tstamp waittime = 0.;
2067	ev_tstamp sleeptime = 0.;	2320	ev_tstamp sleeptime = 0.;
2068		2321
2069	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))	2322	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2070	{	2323	{
		2324	/* remember old timestamp for io_blocktime calculation */
		2325	ev_tstamp prev_mn_now = mn_now;
		2326
2071	/* update time to cancel out callback processing overhead */	2327	/* update time to cancel out callback processing overhead */
2072	time_update (EV_A_ 1e100);	2328	time_update (EV_A_ 1e100);
2073		2329
2074	waittime = MAX_BLOCKTIME;	2330	waittime = MAX_BLOCKTIME;
2075		2331
…		…
2085	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2341	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2086	if (waittime > to) waittime = to;	2342	if (waittime > to) waittime = to;
2087	}	2343	}
2088	#endif	2344	#endif
2089		2345
		2346	/* don't let timeouts decrease the waittime below timeout_blocktime */
2090	if (expect_false (waittime < timeout_blocktime))	2347	if (expect_false (waittime < timeout_blocktime))
2091	waittime = timeout_blocktime;	2348	waittime = timeout_blocktime;
2092		2349
2093	sleeptime = waittime - backend_fudge;	2350	/* extra check because io_blocktime is commonly 0 */
2094
2095	if (expect_true (sleeptime > io_blocktime))	2351	if (expect_false (io_blocktime))
2096	sleeptime = io_blocktime;
2097
2098	if (sleeptime)
2099	{	2352	{
		2353	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2354
		2355	if (sleeptime > waittime - backend_fudge)
		2356	sleeptime = waittime - backend_fudge;
		2357
		2358	if (expect_true (sleeptime > 0.))
		2359	{
2100	ev_sleep (sleeptime);	2360	ev_sleep (sleeptime);
2101	waittime -= sleeptime;	2361	waittime -= sleeptime;
		2362	}
2102	}	2363	}
2103	}	2364	}
2104		2365
		2366	#if EV_MINIMAL < 2
2105	++loop_count;	2367	++loop_count;
		2368	#endif
		2369	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2106	backend_poll (EV_A_ waittime);	2370	backend_poll (EV_A_ waittime);
		2371	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2107		2372
2108	/* update ev_rt_now, do magic */	2373	/* update ev_rt_now, do magic */
2109	time_update (EV_A_ waittime + sleeptime);	2374	time_update (EV_A_ waittime + sleeptime);
2110	}	2375	}
2111		2376
…		…
2122		2387
2123	/* queue check watchers, to be executed first */	2388	/* queue check watchers, to be executed first */
2124	if (expect_false (checkcnt))	2389	if (expect_false (checkcnt))
2125	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2390	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2126		2391
2127	call_pending (EV_A);	2392	EV_INVOKE_PENDING;
2128	}	2393	}
2129	while (expect_true (	2394	while (expect_true (
2130	activecnt	2395	activecnt
2131	&& !loop_done	2396	&& !loop_done
2132	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2397	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2133	));	2398	));
2134		2399
2135	if (loop_done == EVUNLOOP_ONE)	2400	if (loop_done == EVUNLOOP_ONE)
2136	loop_done = EVUNLOOP_CANCEL;	2401	loop_done = EVUNLOOP_CANCEL;
		2402
		2403	#if EV_MINIMAL < 2
		2404	--loop_depth;
		2405	#endif
2137	}	2406	}
2138		2407
2139	void	2408	void
2140	ev_unloop (EV_P_ int how)	2409	ev_unloop (EV_P_ int how)
2141	{	2410	{
…		…
2192	inline_size void	2461	inline_size void
2193	wlist_del (WL *head, WL elem)	2462	wlist_del (WL *head, WL elem)
2194	{	2463	{
2195	while (*head)	2464	while (*head)
2196	{	2465	{
2197	if (*head == elem)	2466	if (expect_true (*head == elem))
2198	{	2467	{
2199	*head = elem->next;	2468	*head = elem->next;
2200	return;	2469	break;
2201	}	2470	}
2202		2471
2203	head = &(*head)->next;	2472	head = &(*head)->next;
2204	}	2473	}
2205	}	2474	}
…		…
2233	}	2502	}
2234		2503
2235	inline_size void	2504	inline_size void
2236	pri_adjust (EV_P_ W w)	2505	pri_adjust (EV_P_ W w)
2237	{	2506	{
2238	int pri = w->priority;	2507	int pri = ev_priority (w);
2239	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2508	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2240	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2509	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2241	w->priority = pri;	2510	ev_set_priority (w, pri);
2242	}	2511	}
2243		2512
2244	inline_speed void	2513	inline_speed void
2245	ev_start (EV_P_ W w, int active)	2514	ev_start (EV_P_ W w, int active)
2246	{	2515	{
…		…
2265		2534
2266	if (expect_false (ev_is_active (w)))	2535	if (expect_false (ev_is_active (w)))
2267	return;	2536	return;
2268		2537
2269	assert (("libev: ev_io_start called with negative fd", fd >= 0));	2538	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2270	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));	2539	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2271		2540
2272	EV_FREQUENT_CHECK;	2541	EV_FREQUENT_CHECK;
2273		2542
2274	ev_start (EV_A_ (W)w, 1);	2543	ev_start (EV_A_ (W)w, 1);
2275	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2544	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2276	wlist_add (&anfds[fd].head, (WL)w);	2545	wlist_add (&anfds[fd].head, (WL)w);
2277		2546
2278	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);	2547	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2279	w->events &= ~EV__IOFDSET;	2548	w->events &= ~EV__IOFDSET;
2280		2549
2281	EV_FREQUENT_CHECK;	2550	EV_FREQUENT_CHECK;
2282	}	2551	}
2283		2552
…		…
2345	timers [active] = timers [timercnt + HEAP0];	2614	timers [active] = timers [timercnt + HEAP0];
2346	adjustheap (timers, timercnt, active);	2615	adjustheap (timers, timercnt, active);
2347	}	2616	}
2348	}	2617	}
2349		2618
2350	EV_FREQUENT_CHECK;
2351
2352	ev_at (w) -= mn_now;	2619	ev_at (w) -= mn_now;
2353		2620
2354	ev_stop (EV_A_ (W)w);	2621	ev_stop (EV_A_ (W)w);
		2622
		2623	EV_FREQUENT_CHECK;
2355	}	2624	}
2356		2625
2357	void noinline	2626	void noinline
2358	ev_timer_again (EV_P_ ev_timer *w)	2627	ev_timer_again (EV_P_ ev_timer *w)
2359	{	2628	{
…		…
2377	}	2646	}
2378		2647
2379	EV_FREQUENT_CHECK;	2648	EV_FREQUENT_CHECK;
2380	}	2649	}
2381		2650
		2651	ev_tstamp
		2652	ev_timer_remaining (EV_P_ ev_timer *w)
		2653	{
		2654	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2655	}
		2656
2382	#if EV_PERIODIC_ENABLE	2657	#if EV_PERIODIC_ENABLE
2383	void noinline	2658	void noinline
2384	ev_periodic_start (EV_P_ ev_periodic *w)	2659	ev_periodic_start (EV_P_ ev_periodic *w)
2385	{	2660	{
2386	if (expect_false (ev_is_active (w)))	2661	if (expect_false (ev_is_active (w)))
…		…
2432	periodics [active] = periodics [periodiccnt + HEAP0];	2707	periodics [active] = periodics [periodiccnt + HEAP0];
2433	adjustheap (periodics, periodiccnt, active);	2708	adjustheap (periodics, periodiccnt, active);
2434	}	2709	}
2435	}	2710	}
2436		2711
2437	EV_FREQUENT_CHECK;
2438
2439	ev_stop (EV_A_ (W)w);	2712	ev_stop (EV_A_ (W)w);
		2713
		2714	EV_FREQUENT_CHECK;
2440	}	2715	}
2441		2716
2442	void noinline	2717	void noinline
2443	ev_periodic_again (EV_P_ ev_periodic *w)	2718	ev_periodic_again (EV_P_ ev_periodic *w)
2444	{	2719	{
…		…
2453	#endif	2728	#endif
2454		2729
2455	void noinline	2730	void noinline
2456	ev_signal_start (EV_P_ ev_signal *w)	2731	ev_signal_start (EV_P_ ev_signal *w)
2457	{	2732	{
2458	#if EV_MULTIPLICITY
2459	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2460	#endif
2461	if (expect_false (ev_is_active (w)))	2733	if (expect_false (ev_is_active (w)))
2462	return;	2734	return;
2463		2735
2464	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));	2736	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2465		2737
2466	evpipe_init (EV_A);	2738	#if EV_MULTIPLICITY
		2739	assert (("libev: a signal must not be attached to two different loops",
		2740	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2467		2741
2468	EV_FREQUENT_CHECK;	2742	signals [w->signum - 1].loop = EV_A;
		2743	#endif
2469		2744
		2745	EV_FREQUENT_CHECK;
		2746
		2747	#if EV_USE_SIGNALFD
		2748	if (sigfd == -2)
2470	{	2749	{
2471	#ifndef _WIN32	2750	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2472	sigset_t full, prev;	2751	if (sigfd < 0 && errno == EINVAL)
2473	sigfillset (&full);	2752	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2474	sigprocmask (SIG_SETMASK, &full, &prev);
2475	#endif
2476		2753
2477	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);	2754	if (sigfd >= 0)
		2755	{
		2756	fd_intern (sigfd); /* doing it twice will not hurt */
2478		2757
2479	#ifndef _WIN32	2758	sigemptyset (&sigfd_set);
2480	sigprocmask (SIG_SETMASK, &prev, 0);	2759
2481	#endif	2760	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2761	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2762	ev_io_start (EV_A_ &sigfd_w);
		2763	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2764	}
2482	}	2765	}
		2766
		2767	if (sigfd >= 0)
		2768	{
		2769	/* TODO: check .head */
		2770	sigaddset (&sigfd_set, w->signum);
		2771	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2772
		2773	signalfd (sigfd, &sigfd_set, 0);
		2774	}
		2775	#endif
2483		2776
2484	ev_start (EV_A_ (W)w, 1);	2777	ev_start (EV_A_ (W)w, 1);
2485	wlist_add (&signals [w->signum - 1].head, (WL)w);	2778	wlist_add (&signals [w->signum - 1].head, (WL)w);
2486		2779
2487	if (!((WL)w)->next)	2780	if (!((WL)w)->next)
		2781	# if EV_USE_SIGNALFD
		2782	if (sigfd < 0) /*TODO*/
		2783	# endif
2488	{	2784	{
2489	#if _WIN32	2785	# ifdef _WIN32
		2786	evpipe_init (EV_A);
		2787
2490	signal (w->signum, ev_sighandler);	2788	signal (w->signum, ev_sighandler);
2491	#else	2789	# else
2492	struct sigaction sa;	2790	struct sigaction sa;
		2791
		2792	evpipe_init (EV_A);
		2793
2493	sa.sa_handler = ev_sighandler;	2794	sa.sa_handler = ev_sighandler;
2494	sigfillset (&sa.sa_mask);	2795	sigfillset (&sa.sa_mask);
2495	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2796	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2496	sigaction (w->signum, &sa, 0);	2797	sigaction (w->signum, &sa, 0);
		2798
		2799	sigemptyset (&sa.sa_mask);
		2800	sigaddset (&sa.sa_mask, w->signum);
		2801	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2497	#endif	2802	#endif
2498	}	2803	}
2499		2804
2500	EV_FREQUENT_CHECK;	2805	EV_FREQUENT_CHECK;
2501	}	2806	}
2502		2807
2503	void noinline	2808	void noinline
…		…
2511		2816
2512	wlist_del (&signals [w->signum - 1].head, (WL)w);	2817	wlist_del (&signals [w->signum - 1].head, (WL)w);
2513	ev_stop (EV_A_ (W)w);	2818	ev_stop (EV_A_ (W)w);
2514		2819
2515	if (!signals [w->signum - 1].head)	2820	if (!signals [w->signum - 1].head)
		2821	{
		2822	#if EV_MULTIPLICITY
		2823	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2824	#endif
		2825	#if EV_USE_SIGNALFD
		2826	if (sigfd >= 0)
		2827	{
		2828	sigset_t ss;
		2829
		2830	sigemptyset (&ss);
		2831	sigaddset (&ss, w->signum);
		2832	sigdelset (&sigfd_set, w->signum);
		2833
		2834	signalfd (sigfd, &sigfd_set, 0);
		2835	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2836	}
		2837	else
		2838	#endif
2516	signal (w->signum, SIG_DFL);	2839	signal (w->signum, SIG_DFL);
		2840	}
2517		2841
2518	EV_FREQUENT_CHECK;	2842	EV_FREQUENT_CHECK;
2519	}	2843	}
2520		2844
2521	void	2845	void
…		…
2562	#define MIN_STAT_INTERVAL 0.1074891	2886	#define MIN_STAT_INTERVAL 0.1074891
2563		2887
2564	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2888	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2565		2889
2566	#if EV_USE_INOTIFY	2890	#if EV_USE_INOTIFY
2567	# define EV_INOTIFY_BUFSIZE 8192	2891
		2892	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2893	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2568		2894
2569	static void noinline	2895	static void noinline
2570	infy_add (EV_P_ ev_stat *w)	2896	infy_add (EV_P_ ev_stat *w)
2571	{	2897	{
2572	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);	2898	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);
2573		2899
2574	if (w->wd < 0)	2900	if (w->wd >= 0)
		2901	{
		2902	struct statfs sfs;
		2903
		2904	/* now local changes will be tracked by inotify, but remote changes won't */
		2905	/* unless the filesystem is known to be local, we therefore still poll */
		2906	/* also do poll on <2.6.25, but with normal frequency */
		2907
		2908	if (!fs_2625)
		2909	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2910	else if (!statfs (w->path, &sfs)
		2911	&& (sfs.f_type == 0x1373 /* devfs */
		2912	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2913	|| sfs.f_type == 0x3153464a /* jfs */
		2914	|| sfs.f_type == 0x52654973 /* reiser3 */
		2915	|| sfs.f_type == 0x01021994 /* tempfs */
		2916	|| sfs.f_type == 0x58465342 /* xfs */))
		2917	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		2918	else
		2919	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2575	{	2920	}
		2921	else
		2922	{
		2923	/* can't use inotify, continue to stat */
2576	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;	2924	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2577	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2578		2925
2579	/* monitor some parent directory for speedup hints */	2926	/* if path is not there, monitor some parent directory for speedup hints */
2580	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2927	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2581	/* but an efficiency issue only */	2928	/* but an efficiency issue only */
2582	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2929	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2583	{	2930	{
2584	char path [4096];	2931	char path [4096];
…		…
2600	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2947	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2601	}	2948	}
2602	}	2949	}
2603		2950
2604	if (w->wd >= 0)	2951	if (w->wd >= 0)
2605	{
2606	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2952	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2607		2953
2608	/* now local changes will be tracked by inotify, but remote changes won't */	2954	/* now re-arm timer, if required */
2609	/* unless the filesystem it known to be local, we therefore still poll */	2955	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2610	/* also do poll on <2.6.25, but with normal frequency */
2611	struct statfs sfs;
2612
2613	if (fs_2625 && !statfs (w->path, &sfs))
2614	if (sfs.f_type == 0x1373 /* devfs */
2615	|| sfs.f_type == 0xEF53 /* ext2/3 */
2616	|| sfs.f_type == 0x3153464a /* jfs */
2617	|| sfs.f_type == 0x52654973 /* reiser3 */
2618	|| sfs.f_type == 0x01021994 /* tempfs */
2619	|| sfs.f_type == 0x58465342 /* xfs */)
2620	return;
2621
2622	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2623	ev_timer_again (EV_A_ &w->timer);	2956	ev_timer_again (EV_A_ &w->timer);
2624	}	2957	if (ev_is_active (&w->timer)) ev_unref (EV_A);
2625	}	2958	}
2626		2959
2627	static void noinline	2960	static void noinline
2628	infy_del (EV_P_ ev_stat *w)	2961	infy_del (EV_P_ ev_stat *w)
2629	{	2962	{
…		…
2674		3007
2675	static void	3008	static void
2676	infy_cb (EV_P_ ev_io *w, int revents)	3009	infy_cb (EV_P_ ev_io *w, int revents)
2677	{	3010	{
2678	char buf [EV_INOTIFY_BUFSIZE];	3011	char buf [EV_INOTIFY_BUFSIZE];
2679	struct inotify_event *ev = (struct inotify_event *)buf;
2680	int ofs;	3012	int ofs;
2681	int len = read (fs_fd, buf, sizeof (buf));	3013	int len = read (fs_fd, buf, sizeof (buf));
2682		3014
2683	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	3015	for (ofs = 0; ofs < len; )
		3016	{
		3017	struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2684	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3018	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3019	ofs += sizeof (struct inotify_event) + ev->len;
		3020	}
		3021	}
		3022
		3023	inline_size unsigned int
		3024	ev_linux_version (void)
		3025	{
		3026	struct utsname buf;
		3027	unsigned int v;
		3028	int i;
		3029	char *p = buf.release;
		3030
		3031	if (uname (&buf))
		3032	return 0;
		3033
		3034	for (i = 3+1; --i; )
		3035	{
		3036	unsigned int c = 0;
		3037
		3038	for (;;)
		3039	{
		3040	if (*p >= '0' && *p <= '9')
		3041	c = c * 10 + *p++ - '0';
		3042	else
		3043	{
		3044	p += *p == '.';
		3045	break;
		3046	}
		3047	}
		3048
		3049	v = (v << 8) | c;
		3050	}
		3051
		3052	return v;
2685	}	3053	}
2686		3054
2687	inline_size void	3055	inline_size void
2688	check_2625 (EV_P)	3056	ev_check_2625 (EV_P)
2689	{	3057	{
2690	/* kernels < 2.6.25 are borked	3058	/* kernels < 2.6.25 are borked
2691	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3059	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2692	*/	3060	*/
2693	struct utsname buf;	3061	if (ev_linux_version () < 0x020619)
2694	int major, minor, micro;
2695
2696	if (uname (&buf))
2697	return;	3062	return;
2698		3063
2699	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2700	return;
2701
2702	if (major < 2
2703	|| (major == 2 && minor < 6)
2704	|| (major == 2 && minor == 6 && micro < 25))
2705	return;
2706
2707	fs_2625 = 1;	3064	fs_2625 = 1;
		3065	}
		3066
		3067	inline_size int
		3068	infy_newfd (void)
		3069	{
		3070	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3071	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		3072	if (fd >= 0)
		3073	return fd;
		3074	#endif
		3075	return inotify_init ();
2708	}	3076	}
2709		3077
2710	inline_size void	3078	inline_size void
2711	infy_init (EV_P)	3079	infy_init (EV_P)
2712	{	3080	{
2713	if (fs_fd != -2)	3081	if (fs_fd != -2)
2714	return;	3082	return;
2715		3083
2716	fs_fd = -1;	3084	fs_fd = -1;
2717		3085
2718	check_2625 (EV_A);	3086	ev_check_2625 (EV_A);
2719		3087
2720	fs_fd = inotify_init ();	3088	fs_fd = infy_newfd ();
2721		3089
2722	if (fs_fd >= 0)	3090	if (fs_fd >= 0)
2723	{	3091	{
		3092	fd_intern (fs_fd);
2724	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3093	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2725	ev_set_priority (&fs_w, EV_MAXPRI);	3094	ev_set_priority (&fs_w, EV_MAXPRI);
2726	ev_io_start (EV_A_ &fs_w);	3095	ev_io_start (EV_A_ &fs_w);
		3096	ev_unref (EV_A);
2727	}	3097	}
2728	}	3098	}
2729		3099
2730	inline_size void	3100	inline_size void
2731	infy_fork (EV_P)	3101	infy_fork (EV_P)
…		…
2733	int slot;	3103	int slot;
2734		3104
2735	if (fs_fd < 0)	3105	if (fs_fd < 0)
2736	return;	3106	return;
2737		3107
		3108	ev_ref (EV_A);
		3109	ev_io_stop (EV_A_ &fs_w);
2738	close (fs_fd);	3110	close (fs_fd);
2739	fs_fd = inotify_init ();	3111	fs_fd = infy_newfd ();
		3112
		3113	if (fs_fd >= 0)
		3114	{
		3115	fd_intern (fs_fd);
		3116	ev_io_set (&fs_w, fs_fd, EV_READ);
		3117	ev_io_start (EV_A_ &fs_w);
		3118	ev_unref (EV_A);
		3119	}
2740		3120
2741	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3121	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2742	{	3122	{
2743	WL w_ = fs_hash [slot].head;	3123	WL w_ = fs_hash [slot].head;
2744	fs_hash [slot].head = 0;	3124	fs_hash [slot].head = 0;
…		…
2751	w->wd = -1;	3131	w->wd = -1;
2752		3132
2753	if (fs_fd >= 0)	3133	if (fs_fd >= 0)
2754	infy_add (EV_A_ w); /* re-add, no matter what */	3134	infy_add (EV_A_ w); /* re-add, no matter what */
2755	else	3135	else
		3136	{
		3137	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3138	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2756	ev_timer_again (EV_A_ &w->timer);	3139	ev_timer_again (EV_A_ &w->timer);
		3140	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3141	}
2757	}	3142	}
2758	}	3143	}
2759	}	3144	}
2760		3145
2761	#endif	3146	#endif
…		…
2778	static void noinline	3163	static void noinline
2779	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3164	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2780	{	3165	{
2781	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));	3166	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2782		3167
2783	/* we copy this here each the time so that */	3168	ev_statdata prev = w->attr;
2784	/* prev has the old value when the callback gets invoked */
2785	w->prev = w->attr;
2786	ev_stat_stat (EV_A_ w);	3169	ev_stat_stat (EV_A_ w);
2787		3170
2788	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3171	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2789	if (	3172	if (
2790	w->prev.st_dev != w->attr.st_dev	3173	prev.st_dev != w->attr.st_dev
2791	|| w->prev.st_ino != w->attr.st_ino	3174	|| prev.st_ino != w->attr.st_ino
2792	|| w->prev.st_mode != w->attr.st_mode	3175	|| prev.st_mode != w->attr.st_mode
2793	|| w->prev.st_nlink != w->attr.st_nlink	3176	|| prev.st_nlink != w->attr.st_nlink
2794	|| w->prev.st_uid != w->attr.st_uid	3177	|| prev.st_uid != w->attr.st_uid
2795	|| w->prev.st_gid != w->attr.st_gid	3178	|| prev.st_gid != w->attr.st_gid
2796	|| w->prev.st_rdev != w->attr.st_rdev	3179	|| prev.st_rdev != w->attr.st_rdev
2797	|| w->prev.st_size != w->attr.st_size	3180	|| prev.st_size != w->attr.st_size
2798	|| w->prev.st_atime != w->attr.st_atime	3181	|| prev.st_atime != w->attr.st_atime
2799	|| w->prev.st_mtime != w->attr.st_mtime	3182	|| prev.st_mtime != w->attr.st_mtime
2800	|| w->prev.st_ctime != w->attr.st_ctime	3183	|| prev.st_ctime != w->attr.st_ctime
2801	) {	3184	) {
		3185	/* we only update w->prev on actual differences */
		3186	/* in case we test more often than invoke the callback, */
		3187	/* to ensure that prev is always different to attr */
		3188	w->prev = prev;
		3189
2802	#if EV_USE_INOTIFY	3190	#if EV_USE_INOTIFY
2803	if (fs_fd >= 0)	3191	if (fs_fd >= 0)
2804	{	3192	{
2805	infy_del (EV_A_ w);	3193	infy_del (EV_A_ w);
2806	infy_add (EV_A_ w);	3194	infy_add (EV_A_ w);
…		…
2831		3219
2832	if (fs_fd >= 0)	3220	if (fs_fd >= 0)
2833	infy_add (EV_A_ w);	3221	infy_add (EV_A_ w);
2834	else	3222	else
2835	#endif	3223	#endif
		3224	{
2836	ev_timer_again (EV_A_ &w->timer);	3225	ev_timer_again (EV_A_ &w->timer);
		3226	ev_unref (EV_A);
		3227	}
2837		3228
2838	ev_start (EV_A_ (W)w, 1);	3229	ev_start (EV_A_ (W)w, 1);
2839		3230
2840	EV_FREQUENT_CHECK;	3231	EV_FREQUENT_CHECK;
2841	}	3232	}
…		…
2850	EV_FREQUENT_CHECK;	3241	EV_FREQUENT_CHECK;
2851		3242
2852	#if EV_USE_INOTIFY	3243	#if EV_USE_INOTIFY
2853	infy_del (EV_A_ w);	3244	infy_del (EV_A_ w);
2854	#endif	3245	#endif
		3246
		3247	if (ev_is_active (&w->timer))
		3248	{
		3249	ev_ref (EV_A);
2855	ev_timer_stop (EV_A_ &w->timer);	3250	ev_timer_stop (EV_A_ &w->timer);
		3251	}
2856		3252
2857	ev_stop (EV_A_ (W)w);	3253	ev_stop (EV_A_ (W)w);
2858		3254
2859	EV_FREQUENT_CHECK;	3255	EV_FREQUENT_CHECK;
2860	}	3256	}
…		…
3001	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3397	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3002	{	3398	{
3003	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));	3399	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3004		3400
3005	{	3401	{
3006	struct ev_loop *loop = w->other;	3402	EV_P = w->other;
3007		3403
3008	while (fdchangecnt)	3404	while (fdchangecnt)
3009	{	3405	{
3010	fd_reify (EV_A);	3406	fd_reify (EV_A);
3011	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3407	ev_loop (EV_A_ EVLOOP_NONBLOCK);
…		…
3019	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3415	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3020		3416
3021	ev_embed_stop (EV_A_ w);	3417	ev_embed_stop (EV_A_ w);
3022		3418
3023	{	3419	{
3024	struct ev_loop *loop = w->other;	3420	EV_P = w->other;
3025		3421
3026	ev_loop_fork (EV_A);	3422	ev_loop_fork (EV_A);
3027	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3423	ev_loop (EV_A_ EVLOOP_NONBLOCK);
3028	}	3424	}
3029		3425
…		…
3043	{	3439	{
3044	if (expect_false (ev_is_active (w)))	3440	if (expect_false (ev_is_active (w)))
3045	return;	3441	return;
3046		3442
3047	{	3443	{
3048	struct ev_loop *loop = w->other;	3444	EV_P = w->other;
3049	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3445	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3050	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3446	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3051	}	3447	}
3052		3448
3053	EV_FREQUENT_CHECK;	3449	EV_FREQUENT_CHECK;
…		…
3080		3476
3081	ev_io_stop (EV_A_ &w->io);	3477	ev_io_stop (EV_A_ &w->io);
3082	ev_prepare_stop (EV_A_ &w->prepare);	3478	ev_prepare_stop (EV_A_ &w->prepare);
3083	ev_fork_stop (EV_A_ &w->fork);	3479	ev_fork_stop (EV_A_ &w->fork);
3084		3480
		3481	ev_stop (EV_A_ (W)w);
		3482
3085	EV_FREQUENT_CHECK;	3483	EV_FREQUENT_CHECK;
3086	}	3484	}
3087	#endif	3485	#endif
3088		3486
3089	#if EV_FORK_ENABLE	3487	#if EV_FORK_ENABLE
…		…
3165		3563
3166	void	3564	void
3167	ev_async_send (EV_P_ ev_async *w)	3565	ev_async_send (EV_P_ ev_async *w)
3168	{	3566	{
3169	w->sent = 1;	3567	w->sent = 1;
3170	evpipe_write (EV_A_ &gotasync);	3568	evpipe_write (EV_A_ &async_pending);
3171	}	3569	}
3172	#endif	3570	#endif
3173		3571
3174	/*****************************************************************************/	3572	/*****************************************************************************/
3175		3573
…		…
3324	if (types & EV_CHECK)	3722	if (types & EV_CHECK)
3325	for (i = checkcnt; i--; )	3723	for (i = checkcnt; i--; )
3326	cb (EV_A_ EV_CHECK, checks [i]);	3724	cb (EV_A_ EV_CHECK, checks [i]);
3327		3725
3328	if (types & EV_SIGNAL)	3726	if (types & EV_SIGNAL)
3329	for (i = 0; i < signalmax; ++i)	3727	for (i = 0; i < EV_NSIG - 1; ++i)
3330	for (wl = signals [i].head; wl; )	3728	for (wl = signals [i].head; wl; )
3331	{	3729	{
3332	wn = wl->next;	3730	wn = wl->next;
3333	cb (EV_A_ EV_SIGNAL, wl);	3731	cb (EV_A_ EV_SIGNAL, wl);
3334	wl = wn;	3732	wl = wn;

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