ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.294 by root, Wed Jul 8 02:46:05 2009 UTC vs.
Revision 1.337 by root, Wed Mar 10 09:18:24 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	/* but consider reporting it, too! :) */
		219	# define EV_NSIG 65
		220	#endif
182		221
183	#ifndef EV_USE_CLOCK_SYSCALL	222	#ifndef EV_USE_CLOCK_SYSCALL
184	# if __linux && __GLIBC__ >= 2	223	# if __linux && __GLIBC__ >= 2
185	# define EV_USE_CLOCK_SYSCALL 1	224	# define EV_USE_CLOCK_SYSCALL 1
186	# else	225	# else
…		…
263	#ifndef EV_USE_EVENTFD	302	#ifndef EV_USE_EVENTFD
264	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))	303	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
265	# define EV_USE_EVENTFD 1	304	# define EV_USE_EVENTFD 1
266	# else	305	# else
267	# define EV_USE_EVENTFD 0	306	# define EV_USE_EVENTFD 0
		307	# endif
		308	#endif
		309
		310	#ifndef EV_USE_SIGNALFD
		311	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		312	# define EV_USE_SIGNALFD 1
		313	# else
		314	# define EV_USE_SIGNALFD 0
268	# endif	315	# endif
269	#endif	316	#endif
270		317
271	#if 0 /* debugging */	318	#if 0 /* debugging */
272	# define EV_VERIFY 3	319	# define EV_VERIFY 3
…		…
300	# endif	347	# endif
301	#endif	348	#endif
302		349
303	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	350	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
304		351
		352	#ifdef _AIX
		353	/* AIX has a completely broken poll.h header */
		354	# undef EV_USE_POLL
		355	# define EV_USE_POLL 0
		356	#endif
		357
305	#ifndef CLOCK_MONOTONIC	358	#ifndef CLOCK_MONOTONIC
306	# undef EV_USE_MONOTONIC	359	# undef EV_USE_MONOTONIC
307	# define EV_USE_MONOTONIC 0	360	# define EV_USE_MONOTONIC 0
308	#endif	361	#endif
309		362
…		…
339	#endif	392	#endif
340		393
341	#if EV_USE_EVENTFD	394	#if EV_USE_EVENTFD
342	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	395	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
343	# include <stdint.h>	396	# include <stdint.h>
		397	# ifndef EFD_NONBLOCK
		398	# define EFD_NONBLOCK O_NONBLOCK
		399	# endif
		400	# ifndef EFD_CLOEXEC
		401	# ifdef O_CLOEXEC
		402	# define EFD_CLOEXEC O_CLOEXEC
		403	# else
		404	# define EFD_CLOEXEC 02000000
		405	# endif
		406	# endif
344	# ifdef __cplusplus	407	# ifdef __cplusplus
345	extern "C" {	408	extern "C" {
346	# endif	409	# endif
347	int eventfd (unsigned int initval, int flags);	410	int (eventfd) (unsigned int initval, int flags);
348	# ifdef __cplusplus	411	# ifdef __cplusplus
349	}	412	}
350	# endif	413	# endif
351	#endif	414	#endif
		415
		416	#if EV_USE_SIGNALFD
		417	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		418	# include <stdint.h>
		419	# ifndef SFD_NONBLOCK
		420	# define SFD_NONBLOCK O_NONBLOCK
		421	# endif
		422	# ifndef SFD_CLOEXEC
		423	# ifdef O_CLOEXEC
		424	# define SFD_CLOEXEC O_CLOEXEC
		425	# else
		426	# define SFD_CLOEXEC 02000000
		427	# endif
		428	# endif
		429	# ifdef __cplusplus
		430	extern "C" {
		431	# endif
		432	int signalfd (int fd, const sigset_t *mask, int flags);
		433
		434	struct signalfd_siginfo
		435	{
		436	uint32_t ssi_signo;
		437	char pad[128 - sizeof (uint32_t)];
		438	};
		439	# ifdef __cplusplus
		440	}
		441	# endif
		442	#endif
		443
352		444
353	/**/	445	/**/
354		446
355	#if EV_VERIFY >= 3	447	#if EV_VERIFY >= 3
356	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	448	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
…		…
368	*/	460	*/
369	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	461	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
370		462
371	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	463	#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) */	464	#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		465
375	#if __GNUC__ >= 4	466	#if __GNUC__ >= 4
376	# define expect(expr,value) __builtin_expect ((expr),(value))	467	# define expect(expr,value) __builtin_expect ((expr),(value))
377	# define noinline __attribute__ ((noinline))	468	# define noinline __attribute__ ((noinline))
378	#else	469	#else
…		…
391	# define inline_speed static noinline	482	# define inline_speed static noinline
392	#else	483	#else
393	# define inline_speed static inline	484	# define inline_speed static inline
394	#endif	485	#endif
395		486
396	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	487	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		488
		489	#if EV_MINPRI == EV_MAXPRI
		490	# define ABSPRI(w) (((W)w), 0)
		491	#else
397	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	492	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		493	#endif
398		494
399	#define EMPTY /* required for microsofts broken pseudo-c compiler */	495	#define EMPTY /* required for microsofts broken pseudo-c compiler */
400	#define EMPTY2(a,b) /* used to suppress some warnings */	496	#define EMPTY2(a,b) /* used to suppress some warnings */
401		497
402	typedef ev_watcher *W;	498	typedef ev_watcher *W;
…		…
414		510
415	#if EV_USE_MONOTONIC	511	#if EV_USE_MONOTONIC
416	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	512	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
417	#endif	513	#endif
418		514
		515	#ifndef EV_FD_TO_WIN32_HANDLE
		516	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		517	#endif
		518	#ifndef EV_WIN32_HANDLE_TO_FD
		519	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		520	#endif
		521	#ifndef EV_WIN32_CLOSE_FD
		522	# define EV_WIN32_CLOSE_FD(fd) close (fd)
		523	#endif
		524
419	#ifdef _WIN32	525	#ifdef _WIN32
420	# include "ev_win32.c"	526	# include "ev_win32.c"
421	#endif	527	#endif
422		528
423	/*****************************************************************************/	529	/*****************************************************************************/
		530
		531	#if EV_AVOID_STDIO
		532	static void noinline
		533	ev_printerr (const char *msg)
		534	{
		535	write (STDERR_FILENO, msg, strlen (msg));
		536	}
		537	#endif
424		538
425	static void (*syserr_cb)(const char *msg);	539	static void (*syserr_cb)(const char *msg);
426		540
427	void	541	void
428	ev_set_syserr_cb (void (*cb)(const char *msg))	542	ev_set_syserr_cb (void (*cb)(const char *msg))
…		…
438		552
439	if (syserr_cb)	553	if (syserr_cb)
440	syserr_cb (msg);	554	syserr_cb (msg);
441	else	555	else
442	{	556	{
		557	#if EV_AVOID_STDIO
		558	const char *err = strerror (errno);
		559
		560	ev_printerr (msg);
		561	ev_printerr (": ");
		562	ev_printerr (err);
		563	ev_printerr ("\n");
		564	#else
443	perror (msg);	565	perror (msg);
		566	#endif
444	abort ();	567	abort ();
445	}	568	}
446	}	569	}
447		570
448	static void *	571	static void *
449	ev_realloc_emul (void *ptr, long size)	572	ev_realloc_emul (void *ptr, long size)
450	{	573	{
		574	#if __GLIBC__
		575	return realloc (ptr, size);
		576	#else
451	/* some systems, notably openbsd and darwin, fail to properly	577	/* some systems, notably openbsd and darwin, fail to properly
452	* implement realloc (x, 0) (as required by both ansi c-98 and	578	* implement realloc (x, 0) (as required by both ansi c-89 and
453	* the single unix specification, so work around them here.	579	* the single unix specification, so work around them here.
454	*/	580	*/
455		581
456	if (size)	582	if (size)
457	return realloc (ptr, size);	583	return realloc (ptr, size);
458		584
459	free (ptr);	585	free (ptr);
460	return 0;	586	return 0;
		587	#endif
461	}	588	}
462		589
463	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;	590	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
464		591
465	void	592	void
…		…
473	{	600	{
474	ptr = alloc (ptr, size);	601	ptr = alloc (ptr, size);
475		602
476	if (!ptr && size)	603	if (!ptr && size)
477	{	604	{
		605	#if EV_AVOID_STDIO
		606	ev_printerr ("libev: memory allocation failed, aborting.\n");
		607	#else
478	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	608	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		609	#endif
479	abort ();	610	abort ();
480	}	611	}
481		612
482	return ptr;	613	return ptr;
483	}	614	}
…		…
485	#define ev_malloc(size) ev_realloc (0, (size))	616	#define ev_malloc(size) ev_realloc (0, (size))
486	#define ev_free(ptr) ev_realloc ((ptr), 0)	617	#define ev_free(ptr) ev_realloc ((ptr), 0)
487		618
488	/*****************************************************************************/	619	/*****************************************************************************/
489		620
		621	/* set in reify when reification needed */
		622	#define EV_ANFD_REIFY 1
		623
490	/* file descriptor info structure */	624	/* file descriptor info structure */
491	typedef struct	625	typedef struct
492	{	626	{
493	WL head;	627	WL head;
494	unsigned char events; /* the events watched for */	628	unsigned char events; /* the events watched for */
495	unsigned char reify; /* flag set when this ANFD needs reification */	629	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 */	630	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
497	unsigned char unused;	631	unsigned char unused;
498	#if EV_USE_EPOLL	632	#if EV_USE_EPOLL
499	unsigned int egen; /* generation counter to counter epoll bugs */	633	unsigned int egen; /* generation counter to counter epoll bugs */
500	#endif	634	#endif
…		…
562		696
563	static int ev_default_loop_ptr;	697	static int ev_default_loop_ptr;
564		698
565	#endif	699	#endif
566		700
		701	#if EV_MINIMAL < 2
		702	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		703	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		704	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		705	#else
		706	# define EV_RELEASE_CB (void)0
		707	# define EV_ACQUIRE_CB (void)0
		708	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		709	#endif
		710
		711	#define EVUNLOOP_RECURSE 0x80
		712
567	/*****************************************************************************/	713	/*****************************************************************************/
568		714
569	#ifndef EV_HAVE_EV_TIME	715	#ifndef EV_HAVE_EV_TIME
570	ev_tstamp	716	ev_tstamp
571	ev_time (void)	717	ev_time (void)
…		…
627		773
628	tv.tv_sec = (time_t)delay;	774	tv.tv_sec = (time_t)delay;
629	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	775	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
630		776
631	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	777	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
632	/* somehting not guaranteed by newer posix versions, but guaranteed */	778	/* something not guaranteed by newer posix versions, but guaranteed */
633	/* by older ones */	779	/* by older ones */
634	select (0, 0, 0, 0, &tv);	780	select (0, 0, 0, 0, &tv);
635	#endif	781	#endif
636	}	782	}
637	}	783	}
…		…
745	}	891	}
746		892
747	/*****************************************************************************/	893	/*****************************************************************************/
748		894
749	inline_speed void	895	inline_speed void
750	fd_event (EV_P_ int fd, int revents)	896	fd_event_nocheck (EV_P_ int fd, int revents)
751	{	897	{
752	ANFD *anfd = anfds + fd;	898	ANFD *anfd = anfds + fd;
753	ev_io *w;	899	ev_io *w;
754		900
755	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	901	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
…		…
759	if (ev)	905	if (ev)
760	ev_feed_event (EV_A_ (W)w, ev);	906	ev_feed_event (EV_A_ (W)w, ev);
761	}	907	}
762	}	908	}
763		909
		910	/* do not submit kernel events for fds that have reify set */
		911	/* because that means they changed while we were polling for new events */
		912	inline_speed void
		913	fd_event (EV_P_ int fd, int revents)
		914	{
		915	ANFD *anfd = anfds + fd;
		916
		917	if (expect_true (!anfd->reify))
		918	fd_event_nocheck (EV_A_ fd, revents);
		919	}
		920
764	void	921	void
765	ev_feed_fd_event (EV_P_ int fd, int revents)	922	ev_feed_fd_event (EV_P_ int fd, int revents)
766	{	923	{
767	if (fd >= 0 && fd < anfdmax)	924	if (fd >= 0 && fd < anfdmax)
768	fd_event (EV_A_ fd, revents);	925	fd_event_nocheck (EV_A_ fd, revents);
769	}	926	}
770		927
771	/* make sure the external fd watch events are in-sync */	928	/* make sure the external fd watch events are in-sync */
772	/* with the kernel/libev internal state */	929	/* with the kernel/libev internal state */
773	inline_size void	930	inline_size void
…		…
788		945
789	#if EV_SELECT_IS_WINSOCKET	946	#if EV_SELECT_IS_WINSOCKET
790	if (events)	947	if (events)
791	{	948	{
792	unsigned long arg;	949	unsigned long arg;
793	#ifdef EV_FD_TO_WIN32_HANDLE
794	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	950	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
795	#else
796	anfd->handle = _get_osfhandle (fd);
797	#endif
798	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	951	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
799	}	952	}
800	#endif	953	#endif
801		954
802	{	955	{
…		…
840	ev_io_stop (EV_A_ w);	993	ev_io_stop (EV_A_ w);
841	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	994	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
842	}	995	}
843	}	996	}
844		997
845	/* check whether the given fd is atcually valid, for error recovery */	998	/* check whether the given fd is actually valid, for error recovery */
846	inline_size int	999	inline_size int
847	fd_valid (int fd)	1000	fd_valid (int fd)
848	{	1001	{
849	#ifdef _WIN32	1002	#ifdef _WIN32
850	return _get_osfhandle (fd) != -1;	1003	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
851	#else	1004	#else
852	return fcntl (fd, F_GETFD) != -1;	1005	return fcntl (fd, F_GETFD) != -1;
853	#endif	1006	#endif
854	}	1007	}
855		1008
…		…
873		1026
874	for (fd = anfdmax; fd--; )	1027	for (fd = anfdmax; fd--; )
875	if (anfds [fd].events)	1028	if (anfds [fd].events)
876	{	1029	{
877	fd_kill (EV_A_ fd);	1030	fd_kill (EV_A_ fd);
878	return;	1031	break;
879	}	1032	}
880	}	1033	}
881		1034
882	/* usually called after fork if backend needs to re-arm all fds from scratch */	1035	/* usually called after fork if backend needs to re-arm all fds from scratch */
883	static void noinline	1036	static void noinline
…		…
888	for (fd = 0; fd < anfdmax; ++fd)	1041	for (fd = 0; fd < anfdmax; ++fd)
889	if (anfds [fd].events)	1042	if (anfds [fd].events)
890	{	1043	{
891	anfds [fd].events = 0;	1044	anfds [fd].events = 0;
892	anfds [fd].emask = 0;	1045	anfds [fd].emask = 0;
893	fd_change (EV_A_ fd, EV__IOFDSET | 1);	1046	fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
894	}	1047	}
		1048	}
		1049
		1050	/* used to prepare libev internal fd's */
		1051	/* this is not fork-safe */
		1052	inline_speed void
		1053	fd_intern (int fd)
		1054	{
		1055	#ifdef _WIN32
		1056	unsigned long arg = 1;
		1057	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
		1058	#else
		1059	fcntl (fd, F_SETFD, FD_CLOEXEC);
		1060	fcntl (fd, F_SETFL, O_NONBLOCK);
		1061	#endif
895	}	1062	}
896		1063
897	/*****************************************************************************/	1064	/*****************************************************************************/
898		1065
899	/*	1066	/*
…		…
973		1140
974	for (;;)	1141	for (;;)
975	{	1142	{
976	int c = k << 1;	1143	int c = k << 1;
977		1144
978	if (c > N + HEAP0 - 1)	1145	if (c >= N + HEAP0)
979	break;	1146	break;
980		1147
981	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])	1148	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
982	? 1 : 0;	1149	? 1 : 0;
983		1150
…		…
1019		1186
1020	/* move an element suitably so it is in a correct place */	1187	/* move an element suitably so it is in a correct place */
1021	inline_size void	1188	inline_size void
1022	adjustheap (ANHE *heap, int N, int k)	1189	adjustheap (ANHE *heap, int N, int k)
1023	{	1190	{
1024	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1191	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1025	upheap (heap, k);	1192	upheap (heap, k);
1026	else	1193	else
1027	downheap (heap, N, k);	1194	downheap (heap, N, k);
1028	}	1195	}
1029		1196
…		…
1042	/*****************************************************************************/	1209	/*****************************************************************************/
1043		1210
1044	/* associate signal watchers to a signal signal */	1211	/* associate signal watchers to a signal signal */
1045	typedef struct	1212	typedef struct
1046	{	1213	{
		1214	EV_ATOMIC_T pending;
		1215	#if EV_MULTIPLICITY
		1216	EV_P;
		1217	#endif
1047	WL head;	1218	WL head;
1048	EV_ATOMIC_T gotsig;
1049	} ANSIG;	1219	} ANSIG;
1050		1220
1051	static ANSIG *signals;	1221	static ANSIG signals [EV_NSIG - 1];
1052	static int signalmax;
1053
1054	static EV_ATOMIC_T gotsig;
1055		1222
1056	/*****************************************************************************/	1223	/*****************************************************************************/
1057		1224
1058	/* used to prepare libev internal fd's */	1225	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1059	/* this is not fork-safe */
1060	inline_speed void
1061	fd_intern (int fd)
1062	{
1063	#ifdef _WIN32
1064	unsigned long arg = 1;
1065	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1066	#else
1067	fcntl (fd, F_SETFD, FD_CLOEXEC);
1068	fcntl (fd, F_SETFL, O_NONBLOCK);
1069	#endif
1070	}
1071		1226
1072	static void noinline	1227	static void noinline
1073	evpipe_init (EV_P)	1228	evpipe_init (EV_P)
1074	{	1229	{
1075	if (!ev_is_active (&pipe_w))	1230	if (!ev_is_active (&pipe_w))
1076	{	1231	{
1077	#if EV_USE_EVENTFD	1232	# if EV_USE_EVENTFD
		1233	evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
		1234	if (evfd < 0 && errno == EINVAL)
1078	if ((evfd = eventfd (0, 0)) >= 0)	1235	evfd = eventfd (0, 0);
		1236
		1237	if (evfd >= 0)
1079	{	1238	{
1080	evpipe [0] = -1;	1239	evpipe [0] = -1;
1081	fd_intern (evfd);	1240	fd_intern (evfd); /* doing it twice doesn't hurt */
1082	ev_io_set (&pipe_w, evfd, EV_READ);	1241	ev_io_set (&pipe_w, evfd, EV_READ);
1083	}	1242	}
1084	else	1243	else
1085	#endif	1244	# endif
1086	{	1245	{
1087	while (pipe (evpipe))	1246	while (pipe (evpipe))
1088	ev_syserr ("(libev) error creating signal/async pipe");	1247	ev_syserr ("(libev) error creating signal/async pipe");
1089		1248
1090	fd_intern (evpipe [0]);	1249	fd_intern (evpipe [0]);
…		…
1101	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1260	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1102	{	1261	{
1103	if (!*flag)	1262	if (!*flag)
1104	{	1263	{
1105	int old_errno = errno; /* save errno because write might clobber it */	1264	int old_errno = errno; /* save errno because write might clobber it */
		1265	char dummy;
1106		1266
1107	*flag = 1;	1267	*flag = 1;
1108		1268
1109	#if EV_USE_EVENTFD	1269	#if EV_USE_EVENTFD
1110	if (evfd >= 0)	1270	if (evfd >= 0)
…		…
1112	uint64_t counter = 1;	1272	uint64_t counter = 1;
1113	write (evfd, &counter, sizeof (uint64_t));	1273	write (evfd, &counter, sizeof (uint64_t));
1114	}	1274	}
1115	else	1275	else
1116	#endif	1276	#endif
1117	write (evpipe [1], &old_errno, 1);	1277	write (evpipe [1], &dummy, 1);
1118		1278
1119	errno = old_errno;	1279	errno = old_errno;
1120	}	1280	}
1121	}	1281	}
1122		1282
1123	/* called whenever the libev signal pipe */	1283	/* called whenever the libev signal pipe */
1124	/* got some events (signal, async) */	1284	/* got some events (signal, async) */
1125	static void	1285	static void
1126	pipecb (EV_P_ ev_io *iow, int revents)	1286	pipecb (EV_P_ ev_io *iow, int revents)
1127	{	1287	{
		1288	int i;
		1289
1128	#if EV_USE_EVENTFD	1290	#if EV_USE_EVENTFD
1129	if (evfd >= 0)	1291	if (evfd >= 0)
1130	{	1292	{
1131	uint64_t counter;	1293	uint64_t counter;
1132	read (evfd, &counter, sizeof (uint64_t));	1294	read (evfd, &counter, sizeof (uint64_t));
…		…
1136	{	1298	{
1137	char dummy;	1299	char dummy;
1138	read (evpipe [0], &dummy, 1);	1300	read (evpipe [0], &dummy, 1);
1139	}	1301	}
1140		1302
1141	if (gotsig && ev_is_default_loop (EV_A))	1303	if (sig_pending)
1142	{	1304	{
1143	int signum;	1305	sig_pending = 0;
1144	gotsig = 0;
1145		1306
1146	for (signum = signalmax; signum--; )	1307	for (i = EV_NSIG - 1; i--; )
1147	if (signals [signum].gotsig)	1308	if (expect_false (signals [i].pending))
1148	ev_feed_signal_event (EV_A_ signum + 1);	1309	ev_feed_signal_event (EV_A_ i + 1);
1149	}	1310	}
1150		1311
1151	#if EV_ASYNC_ENABLE	1312	#if EV_ASYNC_ENABLE
1152	if (gotasync)	1313	if (async_pending)
1153	{	1314	{
1154	int i;	1315	async_pending = 0;
1155	gotasync = 0;
1156		1316
1157	for (i = asynccnt; i--; )	1317	for (i = asynccnt; i--; )
1158	if (asyncs [i]->sent)	1318	if (asyncs [i]->sent)
1159	{	1319	{
1160	asyncs [i]->sent = 0;	1320	asyncs [i]->sent = 0;
…		…
1168		1328
1169	static void	1329	static void
1170	ev_sighandler (int signum)	1330	ev_sighandler (int signum)
1171	{	1331	{
1172	#if EV_MULTIPLICITY	1332	#if EV_MULTIPLICITY
1173	struct ev_loop *loop = &default_loop_struct;	1333	EV_P = signals [signum - 1].loop;
1174	#endif	1334	#endif
1175		1335
1176	#if _WIN32	1336	#ifdef _WIN32
1177	signal (signum, ev_sighandler);	1337	signal (signum, ev_sighandler);
1178	#endif	1338	#endif
1179		1339
1180	signals [signum - 1].gotsig = 1;	1340	signals [signum - 1].pending = 1;
1181	evpipe_write (EV_A_ &gotsig);	1341	evpipe_write (EV_A_ &sig_pending);
1182	}	1342	}
1183		1343
1184	void noinline	1344	void noinline
1185	ev_feed_signal_event (EV_P_ int signum)	1345	ev_feed_signal_event (EV_P_ int signum)
1186	{	1346	{
1187	WL w;	1347	WL w;
1188		1348
		1349	if (expect_false (signum <= 0 || signum > EV_NSIG))
		1350	return;
		1351
		1352	--signum;
		1353
1189	#if EV_MULTIPLICITY	1354	#if EV_MULTIPLICITY
1190	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1355	/* it is permissible to try to feed a signal to the wrong loop */
1191	#endif	1356	/* or, likely more useful, feeding a signal nobody is waiting for */
1192		1357
1193	--signum;	1358	if (expect_false (signals [signum].loop != EV_A))
1194
1195	if (signum < 0 || signum >= signalmax)
1196	return;	1359	return;
		1360	#endif
1197		1361
1198	signals [signum].gotsig = 0;	1362	signals [signum].pending = 0;
1199		1363
1200	for (w = signals [signum].head; w; w = w->next)	1364	for (w = signals [signum].head; w; w = w->next)
1201	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1365	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1202	}	1366	}
1203		1367
		1368	#if EV_USE_SIGNALFD
		1369	static void
		1370	sigfdcb (EV_P_ ev_io *iow, int revents)
		1371	{
		1372	struct signalfd_siginfo si[2], *sip; /* these structs are big */
		1373
		1374	for (;;)
		1375	{
		1376	ssize_t res = read (sigfd, si, sizeof (si));
		1377
		1378	/* not ISO-C, as res might be -1, but works with SuS */
		1379	for (sip = si; (char *)sip < (char *)si + res; ++sip)
		1380	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1381
		1382	if (res < (ssize_t)sizeof (si))
		1383	break;
		1384	}
		1385	}
		1386	#endif
		1387
		1388	#endif
		1389
1204	/*****************************************************************************/	1390	/*****************************************************************************/
1205		1391
		1392	#if EV_CHILD_ENABLE
1206	static WL childs [EV_PID_HASHSIZE];	1393	static WL childs [EV_PID_HASHSIZE];
1207
1208	#ifndef _WIN32
1209		1394
1210	static ev_signal childev;	1395	static ev_signal childev;
1211		1396
1212	#ifndef WIFCONTINUED	1397	#ifndef WIFCONTINUED
1213	# define WIFCONTINUED(status) 0	1398	# define WIFCONTINUED(status) 0
…		…
1352	ev_backend (EV_P)	1537	ev_backend (EV_P)
1353	{	1538	{
1354	return backend;	1539	return backend;
1355	}	1540	}
1356		1541
		1542	#if EV_MINIMAL < 2
1357	unsigned int	1543	unsigned int
1358	ev_loop_count (EV_P)	1544	ev_loop_count (EV_P)
1359	{	1545	{
1360	return loop_count;	1546	return loop_count;
1361	}	1547	}
…		…
1375	void	1561	void
1376	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1562	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1377	{	1563	{
1378	timeout_blocktime = interval;	1564	timeout_blocktime = interval;
1379	}	1565	}
		1566
		1567	void
		1568	ev_set_userdata (EV_P_ void *data)
		1569	{
		1570	userdata = data;
		1571	}
		1572
		1573	void *
		1574	ev_userdata (EV_P)
		1575	{
		1576	return userdata;
		1577	}
		1578
		1579	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1580	{
		1581	invoke_cb = invoke_pending_cb;
		1582	}
		1583
		1584	void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
		1585	{
		1586	release_cb = release;
		1587	acquire_cb = acquire;
		1588	}
		1589	#endif
1380		1590
1381	/* initialise a loop structure, must be zero-initialised */	1591	/* initialise a loop structure, must be zero-initialised */
1382	static void noinline	1592	static void noinline
1383	loop_init (EV_P_ unsigned int flags)	1593	loop_init (EV_P_ unsigned int flags)
1384	{	1594	{
…		…
1402	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1612	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1403	have_monotonic = 1;	1613	have_monotonic = 1;
1404	}	1614	}
1405	#endif	1615	#endif
1406		1616
		1617	/* pid check not overridable via env */
		1618	#ifndef _WIN32
		1619	if (flags & EVFLAG_FORKCHECK)
		1620	curpid = getpid ();
		1621	#endif
		1622
		1623	if (!(flags & EVFLAG_NOENV)
		1624	&& !enable_secure ()
		1625	&& getenv ("LIBEV_FLAGS"))
		1626	flags = atoi (getenv ("LIBEV_FLAGS"));
		1627
1407	ev_rt_now = ev_time ();	1628	ev_rt_now = ev_time ();
1408	mn_now = get_clock ();	1629	mn_now = get_clock ();
1409	now_floor = mn_now;	1630	now_floor = mn_now;
1410	rtmn_diff = ev_rt_now - mn_now;	1631	rtmn_diff = ev_rt_now - mn_now;
		1632	#if EV_MINIMAL < 2
		1633	invoke_cb = ev_invoke_pending;
		1634	#endif
1411		1635
1412	io_blocktime = 0.;	1636	io_blocktime = 0.;
1413	timeout_blocktime = 0.;	1637	timeout_blocktime = 0.;
1414	backend = 0;	1638	backend = 0;
1415	backend_fd = -1;	1639	backend_fd = -1;
1416	gotasync = 0;	1640	sig_pending = 0;
		1641	#if EV_ASYNC_ENABLE
		1642	async_pending = 0;
		1643	#endif
1417	#if EV_USE_INOTIFY	1644	#if EV_USE_INOTIFY
1418	fs_fd = -2;	1645	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1419	#endif	1646	#endif
1420		1647	#if EV_USE_SIGNALFD
1421	/* pid check not overridable via env */	1648	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1422	#ifndef _WIN32
1423	if (flags & EVFLAG_FORKCHECK)
1424	curpid = getpid ();
1425	#endif	1649	#endif
1426
1427	if (!(flags & EVFLAG_NOENV)
1428	&& !enable_secure ()
1429	&& getenv ("LIBEV_FLAGS"))
1430	flags = atoi (getenv ("LIBEV_FLAGS"));
1431		1650
1432	if (!(flags & 0x0000ffffU))	1651	if (!(flags & 0x0000ffffU))
1433	flags |= ev_recommended_backends ();	1652	flags |= ev_recommended_backends ();
1434		1653
1435	#if EV_USE_PORT	1654	#if EV_USE_PORT
…		…
1448	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1667	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1449	#endif	1668	#endif
1450		1669
1451	ev_prepare_init (&pending_w, pendingcb);	1670	ev_prepare_init (&pending_w, pendingcb);
1452		1671
		1672	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1453	ev_init (&pipe_w, pipecb);	1673	ev_init (&pipe_w, pipecb);
1454	ev_set_priority (&pipe_w, EV_MAXPRI);	1674	ev_set_priority (&pipe_w, EV_MAXPRI);
		1675	#endif
1455	}	1676	}
1456	}	1677	}
1457		1678
1458	/* free up a loop structure */	1679	/* free up a loop structure */
1459	static void noinline	1680	static void noinline
…		…
1461	{	1682	{
1462	int i;	1683	int i;
1463		1684
1464	if (ev_is_active (&pipe_w))	1685	if (ev_is_active (&pipe_w))
1465	{	1686	{
1466	ev_ref (EV_A); /* signal watcher */	1687	/*ev_ref (EV_A);*/
1467	ev_io_stop (EV_A_ &pipe_w);	1688	/*ev_io_stop (EV_A_ &pipe_w);*/
1468		1689
1469	#if EV_USE_EVENTFD	1690	#if EV_USE_EVENTFD
1470	if (evfd >= 0)	1691	if (evfd >= 0)
1471	close (evfd);	1692	close (evfd);
1472	#endif	1693	#endif
1473		1694
1474	if (evpipe [0] >= 0)	1695	if (evpipe [0] >= 0)
1475	{	1696	{
1476	close (evpipe [0]);	1697	EV_WIN32_CLOSE_FD (evpipe [0]);
1477	close (evpipe [1]);	1698	EV_WIN32_CLOSE_FD (evpipe [1]);
1478	}	1699	}
1479	}	1700	}
		1701
		1702	#if EV_USE_SIGNALFD
		1703	if (ev_is_active (&sigfd_w))
		1704	close (sigfd);
		1705	#endif
1480		1706
1481	#if EV_USE_INOTIFY	1707	#if EV_USE_INOTIFY
1482	if (fs_fd >= 0)	1708	if (fs_fd >= 0)
1483	close (fs_fd);	1709	close (fs_fd);
1484	#endif	1710	#endif
…		…
1508	#if EV_IDLE_ENABLE	1734	#if EV_IDLE_ENABLE
1509	array_free (idle, [i]);	1735	array_free (idle, [i]);
1510	#endif	1736	#endif
1511	}	1737	}
1512		1738
1513	ev_free (anfds); anfdmax = 0;	1739	ev_free (anfds); anfds = 0; anfdmax = 0;
1514		1740
1515	/* have to use the microsoft-never-gets-it-right macro */	1741	/* have to use the microsoft-never-gets-it-right macro */
1516	array_free (rfeed, EMPTY);	1742	array_free (rfeed, EMPTY);
1517	array_free (fdchange, EMPTY);	1743	array_free (fdchange, EMPTY);
1518	array_free (timer, EMPTY);	1744	array_free (timer, EMPTY);
…		…
1553		1779
1554	if (ev_is_active (&pipe_w))	1780	if (ev_is_active (&pipe_w))
1555	{	1781	{
1556	/* this "locks" the handlers against writing to the pipe */	1782	/* this "locks" the handlers against writing to the pipe */
1557	/* while we modify the fd vars */	1783	/* while we modify the fd vars */
1558	gotsig = 1;	1784	sig_pending = 1;
1559	#if EV_ASYNC_ENABLE	1785	#if EV_ASYNC_ENABLE
1560	gotasync = 1;	1786	async_pending = 1;
1561	#endif	1787	#endif
1562		1788
1563	ev_ref (EV_A);	1789	ev_ref (EV_A);
1564	ev_io_stop (EV_A_ &pipe_w);	1790	ev_io_stop (EV_A_ &pipe_w);
1565		1791
…		…
1568	close (evfd);	1794	close (evfd);
1569	#endif	1795	#endif
1570		1796
1571	if (evpipe [0] >= 0)	1797	if (evpipe [0] >= 0)
1572	{	1798	{
1573	close (evpipe [0]);	1799	EV_WIN32_CLOSE_FD (evpipe [0]);
1574	close (evpipe [1]);	1800	EV_WIN32_CLOSE_FD (evpipe [1]);
1575	}	1801	}
1576		1802
		1803	#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1577	evpipe_init (EV_A);	1804	evpipe_init (EV_A);
1578	/* now iterate over everything, in case we missed something */	1805	/* now iterate over everything, in case we missed something */
1579	pipecb (EV_A_ &pipe_w, EV_READ);	1806	pipecb (EV_A_ &pipe_w, EV_READ);
		1807	#endif
1580	}	1808	}
1581		1809
1582	postfork = 0;	1810	postfork = 0;
1583	}	1811	}
1584		1812
1585	#if EV_MULTIPLICITY	1813	#if EV_MULTIPLICITY
1586		1814
1587	struct ev_loop *	1815	struct ev_loop *
1588	ev_loop_new (unsigned int flags)	1816	ev_loop_new (unsigned int flags)
1589	{	1817	{
1590	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1818	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1591		1819
1592	memset (loop, 0, sizeof (struct ev_loop));	1820	memset (EV_A, 0, sizeof (struct ev_loop));
1593
1594	loop_init (EV_A_ flags);	1821	loop_init (EV_A_ flags);
1595		1822
1596	if (ev_backend (EV_A))	1823	if (ev_backend (EV_A))
1597	return loop;	1824	return EV_A;
1598		1825
1599	return 0;	1826	return 0;
1600	}	1827	}
1601		1828
1602	void	1829	void
…		…
1609	void	1836	void
1610	ev_loop_fork (EV_P)	1837	ev_loop_fork (EV_P)
1611	{	1838	{
1612	postfork = 1; /* must be in line with ev_default_fork */	1839	postfork = 1; /* must be in line with ev_default_fork */
1613	}	1840	}
		1841	#endif /* multiplicity */
1614		1842
1615	#if EV_VERIFY	1843	#if EV_VERIFY
1616	static void noinline	1844	static void noinline
1617	verify_watcher (EV_P_ W w)	1845	verify_watcher (EV_P_ W w)
1618	{	1846	{
…		…
1646	verify_watcher (EV_A_ ws [cnt]);	1874	verify_watcher (EV_A_ ws [cnt]);
1647	}	1875	}
1648	}	1876	}
1649	#endif	1877	#endif
1650		1878
		1879	#if EV_MINIMAL < 2
1651	void	1880	void
1652	ev_loop_verify (EV_P)	1881	ev_loop_verify (EV_P)
1653	{	1882	{
1654	#if EV_VERIFY	1883	#if EV_VERIFY
1655	int i;	1884	int i;
…		…
1696	#if EV_ASYNC_ENABLE	1925	#if EV_ASYNC_ENABLE
1697	assert (asyncmax >= asynccnt);	1926	assert (asyncmax >= asynccnt);
1698	array_verify (EV_A_ (W *)asyncs, asynccnt);	1927	array_verify (EV_A_ (W *)asyncs, asynccnt);
1699	#endif	1928	#endif
1700		1929
		1930	#if EV_PREPARE_ENABLE
1701	assert (preparemax >= preparecnt);	1931	assert (preparemax >= preparecnt);
1702	array_verify (EV_A_ (W *)prepares, preparecnt);	1932	array_verify (EV_A_ (W *)prepares, preparecnt);
		1933	#endif
1703		1934
		1935	#if EV_CHECK_ENABLE
1704	assert (checkmax >= checkcnt);	1936	assert (checkmax >= checkcnt);
1705	array_verify (EV_A_ (W *)checks, checkcnt);	1937	array_verify (EV_A_ (W *)checks, checkcnt);
		1938	#endif
1706		1939
1707	# if 0	1940	# if 0
		1941	#if EV_CHILD_ENABLE
1708	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)	1942	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1709	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)	1943	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1710	# endif	1944	#endif
1711	#endif	1945	# endif
		1946	#endif
1712	}	1947	}
1713		1948	#endif
1714	#endif /* multiplicity */
1715		1949
1716	#if EV_MULTIPLICITY	1950	#if EV_MULTIPLICITY
1717	struct ev_loop *	1951	struct ev_loop *
1718	ev_default_loop_init (unsigned int flags)	1952	ev_default_loop_init (unsigned int flags)
1719	#else	1953	#else
…		…
1722	#endif	1956	#endif
1723	{	1957	{
1724	if (!ev_default_loop_ptr)	1958	if (!ev_default_loop_ptr)
1725	{	1959	{
1726	#if EV_MULTIPLICITY	1960	#if EV_MULTIPLICITY
1727	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1961	EV_P = ev_default_loop_ptr = &default_loop_struct;
1728	#else	1962	#else
1729	ev_default_loop_ptr = 1;	1963	ev_default_loop_ptr = 1;
1730	#endif	1964	#endif
1731		1965
1732	loop_init (EV_A_ flags);	1966	loop_init (EV_A_ flags);
1733		1967
1734	if (ev_backend (EV_A))	1968	if (ev_backend (EV_A))
1735	{	1969	{
1736	#ifndef _WIN32	1970	#if EV_CHILD_ENABLE
1737	ev_signal_init (&childev, childcb, SIGCHLD);	1971	ev_signal_init (&childev, childcb, SIGCHLD);
1738	ev_set_priority (&childev, EV_MAXPRI);	1972	ev_set_priority (&childev, EV_MAXPRI);
1739	ev_signal_start (EV_A_ &childev);	1973	ev_signal_start (EV_A_ &childev);
1740	ev_unref (EV_A); /* child watcher should not keep loop alive */	1974	ev_unref (EV_A); /* child watcher should not keep loop alive */
1741	#endif	1975	#endif
…		…
1749		1983
1750	void	1984	void
1751	ev_default_destroy (void)	1985	ev_default_destroy (void)
1752	{	1986	{
1753	#if EV_MULTIPLICITY	1987	#if EV_MULTIPLICITY
1754	struct ev_loop *loop = ev_default_loop_ptr;	1988	EV_P = ev_default_loop_ptr;
1755	#endif	1989	#endif
1756		1990
1757	ev_default_loop_ptr = 0;	1991	ev_default_loop_ptr = 0;
1758		1992
1759	#ifndef _WIN32	1993	#if EV_CHILD_ENABLE
1760	ev_ref (EV_A); /* child watcher */	1994	ev_ref (EV_A); /* child watcher */
1761	ev_signal_stop (EV_A_ &childev);	1995	ev_signal_stop (EV_A_ &childev);
1762	#endif	1996	#endif
1763		1997
1764	loop_destroy (EV_A);	1998	loop_destroy (EV_A);
…		…
1766		2000
1767	void	2001	void
1768	ev_default_fork (void)	2002	ev_default_fork (void)
1769	{	2003	{
1770	#if EV_MULTIPLICITY	2004	#if EV_MULTIPLICITY
1771	struct ev_loop *loop = ev_default_loop_ptr;	2005	EV_P = ev_default_loop_ptr;
1772	#endif	2006	#endif
1773		2007
1774	postfork = 1; /* must be in line with ev_loop_fork */	2008	postfork = 1; /* must be in line with ev_loop_fork */
1775	}	2009	}
1776		2010
…		…
1780	ev_invoke (EV_P_ void *w, int revents)	2014	ev_invoke (EV_P_ void *w, int revents)
1781	{	2015	{
1782	EV_CB_INVOKE ((W)w, revents);	2016	EV_CB_INVOKE ((W)w, revents);
1783	}	2017	}
1784		2018
1785	inline_speed void	2019	unsigned int
1786	call_pending (EV_P)	2020	ev_pending_count (EV_P)
		2021	{
		2022	int pri;
		2023	unsigned int count = 0;
		2024
		2025	for (pri = NUMPRI; pri--; )
		2026	count += pendingcnt [pri];
		2027
		2028	return count;
		2029	}
		2030
		2031	void noinline
		2032	ev_invoke_pending (EV_P)
1787	{	2033	{
1788	int pri;	2034	int pri;
1789		2035
1790	for (pri = NUMPRI; pri--; )	2036	for (pri = NUMPRI; pri--; )
1791	while (pendingcnt [pri])	2037	while (pendingcnt [pri])
…		…
1959	ANHE_at_cache (*he);	2205	ANHE_at_cache (*he);
1960	}	2206	}
1961	}	2207	}
1962		2208
1963	/* fetch new monotonic and realtime times from the kernel */	2209	/* fetch new monotonic and realtime times from the kernel */
1964	/* also detetc if there was a timejump, and act accordingly */	2210	/* also detect if there was a timejump, and act accordingly */
1965	inline_speed void	2211	inline_speed void
1966	time_update (EV_P_ ev_tstamp max_block)	2212	time_update (EV_P_ ev_tstamp max_block)
1967	{	2213	{
1968	#if EV_USE_MONOTONIC	2214	#if EV_USE_MONOTONIC
1969	if (expect_true (have_monotonic))	2215	if (expect_true (have_monotonic))
…		…
2029	}	2275	}
2030		2276
2031	void	2277	void
2032	ev_loop (EV_P_ int flags)	2278	ev_loop (EV_P_ int flags)
2033	{	2279	{
		2280	#if EV_MINIMAL < 2
2034	++loop_depth;	2281	++loop_depth;
		2282	#endif
		2283
		2284	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2035		2285
2036	loop_done = EVUNLOOP_CANCEL;	2286	loop_done = EVUNLOOP_CANCEL;
2037		2287
2038	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2288	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2039		2289
2040	do	2290	do
2041	{	2291	{
2042	#if EV_VERIFY >= 2	2292	#if EV_VERIFY >= 2
2043	ev_loop_verify (EV_A);	2293	ev_loop_verify (EV_A);
…		…
2056	/* we might have forked, so queue fork handlers */	2306	/* we might have forked, so queue fork handlers */
2057	if (expect_false (postfork))	2307	if (expect_false (postfork))
2058	if (forkcnt)	2308	if (forkcnt)
2059	{	2309	{
2060	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2310	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2061	call_pending (EV_A);	2311	EV_INVOKE_PENDING;
2062	}	2312	}
2063	#endif	2313	#endif
2064		2314
		2315	#if EV_PREPARE_ENABLE
2065	/* queue prepare watchers (and execute them) */	2316	/* queue prepare watchers (and execute them) */
2066	if (expect_false (preparecnt))	2317	if (expect_false (preparecnt))
2067	{	2318	{
2068	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2319	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2069	call_pending (EV_A);	2320	EV_INVOKE_PENDING;
2070	}	2321	}
		2322	#endif
		2323
		2324	if (expect_false (loop_done))
		2325	break;
2071		2326
2072	/* we might have forked, so reify kernel state if necessary */	2327	/* we might have forked, so reify kernel state if necessary */
2073	if (expect_false (postfork))	2328	if (expect_false (postfork))
2074	loop_fork (EV_A);	2329	loop_fork (EV_A);
2075		2330
…		…
2123	waittime -= sleeptime;	2378	waittime -= sleeptime;
2124	}	2379	}
2125	}	2380	}
2126	}	2381	}
2127		2382
		2383	#if EV_MINIMAL < 2
2128	++loop_count;	2384	++loop_count;
		2385	#endif
		2386	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2129	backend_poll (EV_A_ waittime);	2387	backend_poll (EV_A_ waittime);
		2388	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2130		2389
2131	/* update ev_rt_now, do magic */	2390	/* update ev_rt_now, do magic */
2132	time_update (EV_A_ waittime + sleeptime);	2391	time_update (EV_A_ waittime + sleeptime);
2133	}	2392	}
2134		2393
…		…
2141	#if EV_IDLE_ENABLE	2400	#if EV_IDLE_ENABLE
2142	/* queue idle watchers unless other events are pending */	2401	/* queue idle watchers unless other events are pending */
2143	idle_reify (EV_A);	2402	idle_reify (EV_A);
2144	#endif	2403	#endif
2145		2404
		2405	#if EV_CHECK_ENABLE
2146	/* queue check watchers, to be executed first */	2406	/* queue check watchers, to be executed first */
2147	if (expect_false (checkcnt))	2407	if (expect_false (checkcnt))
2148	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2408	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		2409	#endif
2149		2410
2150	call_pending (EV_A);	2411	EV_INVOKE_PENDING;
2151	}	2412	}
2152	while (expect_true (	2413	while (expect_true (
2153	activecnt	2414	activecnt
2154	&& !loop_done	2415	&& !loop_done
2155	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))	2416	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2156	));	2417	));
2157		2418
2158	if (loop_done == EVUNLOOP_ONE)	2419	if (loop_done == EVUNLOOP_ONE)
2159	loop_done = EVUNLOOP_CANCEL;	2420	loop_done = EVUNLOOP_CANCEL;
2160		2421
		2422	#if EV_MINIMAL < 2
2161	--loop_depth;	2423	--loop_depth;
		2424	#endif
2162	}	2425	}
2163		2426
2164	void	2427	void
2165	ev_unloop (EV_P_ int how)	2428	ev_unloop (EV_P_ int how)
2166	{	2429	{
…		…
2217	inline_size void	2480	inline_size void
2218	wlist_del (WL *head, WL elem)	2481	wlist_del (WL *head, WL elem)
2219	{	2482	{
2220	while (*head)	2483	while (*head)
2221	{	2484	{
2222	if (*head == elem)	2485	if (expect_true (*head == elem))
2223	{	2486	{
2224	*head = elem->next;	2487	*head = elem->next;
2225	return;	2488	break;
2226	}	2489	}
2227		2490
2228	head = &(*head)->next;	2491	head = &(*head)->next;
2229	}	2492	}
2230	}	2493	}
…		…
2258	}	2521	}
2259		2522
2260	inline_size void	2523	inline_size void
2261	pri_adjust (EV_P_ W w)	2524	pri_adjust (EV_P_ W w)
2262	{	2525	{
2263	int pri = w->priority;	2526	int pri = ev_priority (w);
2264	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2527	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2265	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2528	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2266	w->priority = pri;	2529	ev_set_priority (w, pri);
2267	}	2530	}
2268		2531
2269	inline_speed void	2532	inline_speed void
2270	ev_start (EV_P_ W w, int active)	2533	ev_start (EV_P_ W w, int active)
2271	{	2534	{
…		…
2290		2553
2291	if (expect_false (ev_is_active (w)))	2554	if (expect_false (ev_is_active (w)))
2292	return;	2555	return;
2293		2556
2294	assert (("libev: ev_io_start called with negative fd", fd >= 0));	2557	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2295	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));	2558	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2296		2559
2297	EV_FREQUENT_CHECK;	2560	EV_FREQUENT_CHECK;
2298		2561
2299	ev_start (EV_A_ (W)w, 1);	2562	ev_start (EV_A_ (W)w, 1);
2300	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2563	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2301	wlist_add (&anfds[fd].head, (WL)w);	2564	wlist_add (&anfds[fd].head, (WL)w);
2302		2565
2303	fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);	2566	fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2304	w->events &= ~EV__IOFDSET;	2567	w->events &= ~EV__IOFDSET;
2305		2568
2306	EV_FREQUENT_CHECK;	2569	EV_FREQUENT_CHECK;
2307	}	2570	}
2308		2571
…		…
2370	timers [active] = timers [timercnt + HEAP0];	2633	timers [active] = timers [timercnt + HEAP0];
2371	adjustheap (timers, timercnt, active);	2634	adjustheap (timers, timercnt, active);
2372	}	2635	}
2373	}	2636	}
2374		2637
2375	EV_FREQUENT_CHECK;
2376
2377	ev_at (w) -= mn_now;	2638	ev_at (w) -= mn_now;
2378		2639
2379	ev_stop (EV_A_ (W)w);	2640	ev_stop (EV_A_ (W)w);
		2641
		2642	EV_FREQUENT_CHECK;
2380	}	2643	}
2381		2644
2382	void noinline	2645	void noinline
2383	ev_timer_again (EV_P_ ev_timer *w)	2646	ev_timer_again (EV_P_ ev_timer *w)
2384	{	2647	{
…		…
2402	}	2665	}
2403		2666
2404	EV_FREQUENT_CHECK;	2667	EV_FREQUENT_CHECK;
2405	}	2668	}
2406		2669
		2670	ev_tstamp
		2671	ev_timer_remaining (EV_P_ ev_timer *w)
		2672	{
		2673	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2674	}
		2675
2407	#if EV_PERIODIC_ENABLE	2676	#if EV_PERIODIC_ENABLE
2408	void noinline	2677	void noinline
2409	ev_periodic_start (EV_P_ ev_periodic *w)	2678	ev_periodic_start (EV_P_ ev_periodic *w)
2410	{	2679	{
2411	if (expect_false (ev_is_active (w)))	2680	if (expect_false (ev_is_active (w)))
…		…
2457	periodics [active] = periodics [periodiccnt + HEAP0];	2726	periodics [active] = periodics [periodiccnt + HEAP0];
2458	adjustheap (periodics, periodiccnt, active);	2727	adjustheap (periodics, periodiccnt, active);
2459	}	2728	}
2460	}	2729	}
2461		2730
2462	EV_FREQUENT_CHECK;
2463
2464	ev_stop (EV_A_ (W)w);	2731	ev_stop (EV_A_ (W)w);
		2732
		2733	EV_FREQUENT_CHECK;
2465	}	2734	}
2466		2735
2467	void noinline	2736	void noinline
2468	ev_periodic_again (EV_P_ ev_periodic *w)	2737	ev_periodic_again (EV_P_ ev_periodic *w)
2469	{	2738	{
…		…
2475		2744
2476	#ifndef SA_RESTART	2745	#ifndef SA_RESTART
2477	# define SA_RESTART 0	2746	# define SA_RESTART 0
2478	#endif	2747	#endif
2479		2748
		2749	#if EV_SIGNAL_ENABLE
		2750
2480	void noinline	2751	void noinline
2481	ev_signal_start (EV_P_ ev_signal *w)	2752	ev_signal_start (EV_P_ ev_signal *w)
2482	{	2753	{
2483	#if EV_MULTIPLICITY
2484	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2485	#endif
2486	if (expect_false (ev_is_active (w)))	2754	if (expect_false (ev_is_active (w)))
2487	return;	2755	return;
2488		2756
2489	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));	2757	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2490		2758
2491	evpipe_init (EV_A);	2759	#if EV_MULTIPLICITY
		2760	assert (("libev: a signal must not be attached to two different loops",
		2761	!signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2492		2762
2493	EV_FREQUENT_CHECK;	2763	signals [w->signum - 1].loop = EV_A;
		2764	#endif
2494		2765
		2766	EV_FREQUENT_CHECK;
		2767
		2768	#if EV_USE_SIGNALFD
		2769	if (sigfd == -2)
2495	{	2770	{
2496	#ifndef _WIN32	2771	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2497	sigset_t full, prev;	2772	if (sigfd < 0 && errno == EINVAL)
2498	sigfillset (&full);	2773	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2499	sigprocmask (SIG_SETMASK, &full, &prev);
2500	#endif
2501		2774
2502	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);	2775	if (sigfd >= 0)
		2776	{
		2777	fd_intern (sigfd); /* doing it twice will not hurt */
2503		2778
2504	#ifndef _WIN32	2779	sigemptyset (&sigfd_set);
2505	sigprocmask (SIG_SETMASK, &prev, 0);	2780
2506	#endif	2781	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2782	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2783	ev_io_start (EV_A_ &sigfd_w);
		2784	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2785	}
2507	}	2786	}
		2787
		2788	if (sigfd >= 0)
		2789	{
		2790	/* TODO: check .head */
		2791	sigaddset (&sigfd_set, w->signum);
		2792	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2793
		2794	signalfd (sigfd, &sigfd_set, 0);
		2795	}
		2796	#endif
2508		2797
2509	ev_start (EV_A_ (W)w, 1);	2798	ev_start (EV_A_ (W)w, 1);
2510	wlist_add (&signals [w->signum - 1].head, (WL)w);	2799	wlist_add (&signals [w->signum - 1].head, (WL)w);
2511		2800
2512	if (!((WL)w)->next)	2801	if (!((WL)w)->next)
		2802	# if EV_USE_SIGNALFD
		2803	if (sigfd < 0) /*TODO*/
		2804	# endif
2513	{	2805	{
2514	#if _WIN32	2806	# ifdef _WIN32
		2807	evpipe_init (EV_A);
		2808
2515	signal (w->signum, ev_sighandler);	2809	signal (w->signum, ev_sighandler);
2516	#else	2810	# else
2517	struct sigaction sa;	2811	struct sigaction sa;
		2812
		2813	evpipe_init (EV_A);
		2814
2518	sa.sa_handler = ev_sighandler;	2815	sa.sa_handler = ev_sighandler;
2519	sigfillset (&sa.sa_mask);	2816	sigfillset (&sa.sa_mask);
2520	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2817	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2521	sigaction (w->signum, &sa, 0);	2818	sigaction (w->signum, &sa, 0);
		2819
		2820	sigemptyset (&sa.sa_mask);
		2821	sigaddset (&sa.sa_mask, w->signum);
		2822	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2522	#endif	2823	#endif
2523	}	2824	}
2524		2825
2525	EV_FREQUENT_CHECK;	2826	EV_FREQUENT_CHECK;
2526	}	2827	}
2527		2828
2528	void noinline	2829	void noinline
…		…
2536		2837
2537	wlist_del (&signals [w->signum - 1].head, (WL)w);	2838	wlist_del (&signals [w->signum - 1].head, (WL)w);
2538	ev_stop (EV_A_ (W)w);	2839	ev_stop (EV_A_ (W)w);
2539		2840
2540	if (!signals [w->signum - 1].head)	2841	if (!signals [w->signum - 1].head)
		2842	{
		2843	#if EV_MULTIPLICITY
		2844	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2845	#endif
		2846	#if EV_USE_SIGNALFD
		2847	if (sigfd >= 0)
		2848	{
		2849	sigset_t ss;
		2850
		2851	sigemptyset (&ss);
		2852	sigaddset (&ss, w->signum);
		2853	sigdelset (&sigfd_set, w->signum);
		2854
		2855	signalfd (sigfd, &sigfd_set, 0);
		2856	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2857	}
		2858	else
		2859	#endif
2541	signal (w->signum, SIG_DFL);	2860	signal (w->signum, SIG_DFL);
		2861	}
2542		2862
2543	EV_FREQUENT_CHECK;	2863	EV_FREQUENT_CHECK;
2544	}	2864	}
		2865
		2866	#endif
		2867
		2868	#if EV_CHILD_ENABLE
2545		2869
2546	void	2870	void
2547	ev_child_start (EV_P_ ev_child *w)	2871	ev_child_start (EV_P_ ev_child *w)
2548	{	2872	{
2549	#if EV_MULTIPLICITY	2873	#if EV_MULTIPLICITY
…		…
2573	ev_stop (EV_A_ (W)w);	2897	ev_stop (EV_A_ (W)w);
2574		2898
2575	EV_FREQUENT_CHECK;	2899	EV_FREQUENT_CHECK;
2576	}	2900	}
2577		2901
		2902	#endif
		2903
2578	#if EV_STAT_ENABLE	2904	#if EV_STAT_ENABLE
2579		2905
2580	# ifdef _WIN32	2906	# ifdef _WIN32
2581	# undef lstat	2907	# undef lstat
2582	# define lstat(a,b) _stati64 (a,b)	2908	# define lstat(a,b) _stati64 (a,b)
…		…
2587	#define MIN_STAT_INTERVAL 0.1074891	2913	#define MIN_STAT_INTERVAL 0.1074891
2588		2914
2589	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2915	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2590		2916
2591	#if EV_USE_INOTIFY	2917	#if EV_USE_INOTIFY
2592	# define EV_INOTIFY_BUFSIZE 8192	2918
		2919	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2920	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2593		2921
2594	static void noinline	2922	static void noinline
2595	infy_add (EV_P_ ev_stat *w)	2923	infy_add (EV_P_ ev_stat *w)
2596	{	2924	{
2597	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);	2925	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);
2598		2926
2599	if (w->wd < 0)	2927	if (w->wd >= 0)
		2928	{
		2929	struct statfs sfs;
		2930
		2931	/* now local changes will be tracked by inotify, but remote changes won't */
		2932	/* unless the filesystem is known to be local, we therefore still poll */
		2933	/* also do poll on <2.6.25, but with normal frequency */
		2934
		2935	if (!fs_2625)
		2936	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2937	else if (!statfs (w->path, &sfs)
		2938	&& (sfs.f_type == 0x1373 /* devfs */
		2939	|| sfs.f_type == 0xEF53 /* ext2/3 */
		2940	|| sfs.f_type == 0x3153464a /* jfs */
		2941	|| sfs.f_type == 0x52654973 /* reiser3 */
		2942	|| sfs.f_type == 0x01021994 /* tempfs */
		2943	|| sfs.f_type == 0x58465342 /* xfs */))
		2944	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		2945	else
		2946	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2600	{	2947	}
		2948	else
		2949	{
		2950	/* can't use inotify, continue to stat */
2601	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;	2951	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2602	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2603		2952
2604	/* monitor some parent directory for speedup hints */	2953	/* if path is not there, monitor some parent directory for speedup hints */
2605	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2954	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2606	/* but an efficiency issue only */	2955	/* but an efficiency issue only */
2607	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)	2956	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2608	{	2957	{
2609	char path [4096];	2958	char path [4096];
…		…
2625	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));	2974	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2626	}	2975	}
2627	}	2976	}
2628		2977
2629	if (w->wd >= 0)	2978	if (w->wd >= 0)
2630	{
2631	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2979	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2632		2980
2633	/* now local changes will be tracked by inotify, but remote changes won't */	2981	/* now re-arm timer, if required */
2634	/* unless the filesystem it known to be local, we therefore still poll */	2982	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2635	/* also do poll on <2.6.25, but with normal frequency */
2636	struct statfs sfs;
2637
2638	if (fs_2625 && !statfs (w->path, &sfs))
2639	if (sfs.f_type == 0x1373 /* devfs */
2640	|| sfs.f_type == 0xEF53 /* ext2/3 */
2641	|| sfs.f_type == 0x3153464a /* jfs */
2642	|| sfs.f_type == 0x52654973 /* reiser3 */
2643	|| sfs.f_type == 0x01021994 /* tempfs */
2644	|| sfs.f_type == 0x58465342 /* xfs */)
2645	return;
2646
2647	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2648	ev_timer_again (EV_A_ &w->timer);	2983	ev_timer_again (EV_A_ &w->timer);
2649	}	2984	if (ev_is_active (&w->timer)) ev_unref (EV_A);
2650	}	2985	}
2651		2986
2652	static void noinline	2987	static void noinline
2653	infy_del (EV_P_ ev_stat *w)	2988	infy_del (EV_P_ ev_stat *w)
2654	{	2989	{
…		…
2699		3034
2700	static void	3035	static void
2701	infy_cb (EV_P_ ev_io *w, int revents)	3036	infy_cb (EV_P_ ev_io *w, int revents)
2702	{	3037	{
2703	char buf [EV_INOTIFY_BUFSIZE];	3038	char buf [EV_INOTIFY_BUFSIZE];
2704	struct inotify_event *ev = (struct inotify_event *)buf;
2705	int ofs;	3039	int ofs;
2706	int len = read (fs_fd, buf, sizeof (buf));	3040	int len = read (fs_fd, buf, sizeof (buf));
2707		3041
2708	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	3042	for (ofs = 0; ofs < len; )
		3043	{
		3044	struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2709	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3045	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3046	ofs += sizeof (struct inotify_event) + ev->len;
		3047	}
		3048	}
		3049
		3050	inline_size unsigned int
		3051	ev_linux_version (void)
		3052	{
		3053	struct utsname buf;
		3054	unsigned int v;
		3055	int i;
		3056	char *p = buf.release;
		3057
		3058	if (uname (&buf))
		3059	return 0;
		3060
		3061	for (i = 3+1; --i; )
		3062	{
		3063	unsigned int c = 0;
		3064
		3065	for (;;)
		3066	{
		3067	if (*p >= '0' && *p <= '9')
		3068	c = c * 10 + *p++ - '0';
		3069	else
		3070	{
		3071	p += *p == '.';
		3072	break;
		3073	}
		3074	}
		3075
		3076	v = (v << 8) | c;
		3077	}
		3078
		3079	return v;
2710	}	3080	}
2711		3081
2712	inline_size void	3082	inline_size void
2713	check_2625 (EV_P)	3083	ev_check_2625 (EV_P)
2714	{	3084	{
2715	/* kernels < 2.6.25 are borked	3085	/* kernels < 2.6.25 are borked
2716	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3086	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2717	*/	3087	*/
2718	struct utsname buf;	3088	if (ev_linux_version () < 0x020619)
2719	int major, minor, micro;
2720
2721	if (uname (&buf))
2722	return;	3089	return;
2723		3090
2724	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2725	return;
2726
2727	if (major < 2
2728	|| (major == 2 && minor < 6)
2729	|| (major == 2 && minor == 6 && micro < 25))
2730	return;
2731
2732	fs_2625 = 1;	3091	fs_2625 = 1;
		3092	}
		3093
		3094	inline_size int
		3095	infy_newfd (void)
		3096	{
		3097	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3098	int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
		3099	if (fd >= 0)
		3100	return fd;
		3101	#endif
		3102	return inotify_init ();
2733	}	3103	}
2734		3104
2735	inline_size void	3105	inline_size void
2736	infy_init (EV_P)	3106	infy_init (EV_P)
2737	{	3107	{
2738	if (fs_fd != -2)	3108	if (fs_fd != -2)
2739	return;	3109	return;
2740		3110
2741	fs_fd = -1;	3111	fs_fd = -1;
2742		3112
2743	check_2625 (EV_A);	3113	ev_check_2625 (EV_A);
2744		3114
2745	fs_fd = inotify_init ();	3115	fs_fd = infy_newfd ();
2746		3116
2747	if (fs_fd >= 0)	3117	if (fs_fd >= 0)
2748	{	3118	{
		3119	fd_intern (fs_fd);
2749	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3120	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2750	ev_set_priority (&fs_w, EV_MAXPRI);	3121	ev_set_priority (&fs_w, EV_MAXPRI);
2751	ev_io_start (EV_A_ &fs_w);	3122	ev_io_start (EV_A_ &fs_w);
		3123	ev_unref (EV_A);
2752	}	3124	}
2753	}	3125	}
2754		3126
2755	inline_size void	3127	inline_size void
2756	infy_fork (EV_P)	3128	infy_fork (EV_P)
…		…
2758	int slot;	3130	int slot;
2759		3131
2760	if (fs_fd < 0)	3132	if (fs_fd < 0)
2761	return;	3133	return;
2762		3134
		3135	ev_ref (EV_A);
		3136	ev_io_stop (EV_A_ &fs_w);
2763	close (fs_fd);	3137	close (fs_fd);
2764	fs_fd = inotify_init ();	3138	fs_fd = infy_newfd ();
		3139
		3140	if (fs_fd >= 0)
		3141	{
		3142	fd_intern (fs_fd);
		3143	ev_io_set (&fs_w, fs_fd, EV_READ);
		3144	ev_io_start (EV_A_ &fs_w);
		3145	ev_unref (EV_A);
		3146	}
2765		3147
2766	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3148	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2767	{	3149	{
2768	WL w_ = fs_hash [slot].head;	3150	WL w_ = fs_hash [slot].head;
2769	fs_hash [slot].head = 0;	3151	fs_hash [slot].head = 0;
…		…
2776	w->wd = -1;	3158	w->wd = -1;
2777		3159
2778	if (fs_fd >= 0)	3160	if (fs_fd >= 0)
2779	infy_add (EV_A_ w); /* re-add, no matter what */	3161	infy_add (EV_A_ w); /* re-add, no matter what */
2780	else	3162	else
		3163	{
		3164	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3165	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2781	ev_timer_again (EV_A_ &w->timer);	3166	ev_timer_again (EV_A_ &w->timer);
		3167	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3168	}
2782	}	3169	}
2783	}	3170	}
2784	}	3171	}
2785		3172
2786	#endif	3173	#endif
…		…
2803	static void noinline	3190	static void noinline
2804	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3191	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2805	{	3192	{
2806	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));	3193	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2807		3194
2808	/* we copy this here each the time so that */	3195	ev_statdata prev = w->attr;
2809	/* prev has the old value when the callback gets invoked */
2810	w->prev = w->attr;
2811	ev_stat_stat (EV_A_ w);	3196	ev_stat_stat (EV_A_ w);
2812		3197
2813	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3198	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2814	if (	3199	if (
2815	w->prev.st_dev != w->attr.st_dev	3200	prev.st_dev != w->attr.st_dev
2816	|| w->prev.st_ino != w->attr.st_ino	3201	|| prev.st_ino != w->attr.st_ino
2817	|| w->prev.st_mode != w->attr.st_mode	3202	|| prev.st_mode != w->attr.st_mode
2818	|| w->prev.st_nlink != w->attr.st_nlink	3203	|| prev.st_nlink != w->attr.st_nlink
2819	|| w->prev.st_uid != w->attr.st_uid	3204	|| prev.st_uid != w->attr.st_uid
2820	|| w->prev.st_gid != w->attr.st_gid	3205	|| prev.st_gid != w->attr.st_gid
2821	|| w->prev.st_rdev != w->attr.st_rdev	3206	|| prev.st_rdev != w->attr.st_rdev
2822	|| w->prev.st_size != w->attr.st_size	3207	|| prev.st_size != w->attr.st_size
2823	|| w->prev.st_atime != w->attr.st_atime	3208	|| prev.st_atime != w->attr.st_atime
2824	|| w->prev.st_mtime != w->attr.st_mtime	3209	|| prev.st_mtime != w->attr.st_mtime
2825	|| w->prev.st_ctime != w->attr.st_ctime	3210	|| prev.st_ctime != w->attr.st_ctime
2826	) {	3211	) {
		3212	/* we only update w->prev on actual differences */
		3213	/* in case we test more often than invoke the callback, */
		3214	/* to ensure that prev is always different to attr */
		3215	w->prev = prev;
		3216
2827	#if EV_USE_INOTIFY	3217	#if EV_USE_INOTIFY
2828	if (fs_fd >= 0)	3218	if (fs_fd >= 0)
2829	{	3219	{
2830	infy_del (EV_A_ w);	3220	infy_del (EV_A_ w);
2831	infy_add (EV_A_ w);	3221	infy_add (EV_A_ w);
…		…
2856		3246
2857	if (fs_fd >= 0)	3247	if (fs_fd >= 0)
2858	infy_add (EV_A_ w);	3248	infy_add (EV_A_ w);
2859	else	3249	else
2860	#endif	3250	#endif
		3251	{
2861	ev_timer_again (EV_A_ &w->timer);	3252	ev_timer_again (EV_A_ &w->timer);
		3253	ev_unref (EV_A);
		3254	}
2862		3255
2863	ev_start (EV_A_ (W)w, 1);	3256	ev_start (EV_A_ (W)w, 1);
2864		3257
2865	EV_FREQUENT_CHECK;	3258	EV_FREQUENT_CHECK;
2866	}	3259	}
…		…
2875	EV_FREQUENT_CHECK;	3268	EV_FREQUENT_CHECK;
2876		3269
2877	#if EV_USE_INOTIFY	3270	#if EV_USE_INOTIFY
2878	infy_del (EV_A_ w);	3271	infy_del (EV_A_ w);
2879	#endif	3272	#endif
		3273
		3274	if (ev_is_active (&w->timer))
		3275	{
		3276	ev_ref (EV_A);
2880	ev_timer_stop (EV_A_ &w->timer);	3277	ev_timer_stop (EV_A_ &w->timer);
		3278	}
2881		3279
2882	ev_stop (EV_A_ (W)w);	3280	ev_stop (EV_A_ (W)w);
2883		3281
2884	EV_FREQUENT_CHECK;	3282	EV_FREQUENT_CHECK;
2885	}	3283	}
…		…
2930		3328
2931	EV_FREQUENT_CHECK;	3329	EV_FREQUENT_CHECK;
2932	}	3330	}
2933	#endif	3331	#endif
2934		3332
		3333	#if EV_PREPARE_ENABLE
2935	void	3334	void
2936	ev_prepare_start (EV_P_ ev_prepare *w)	3335	ev_prepare_start (EV_P_ ev_prepare *w)
2937	{	3336	{
2938	if (expect_false (ev_is_active (w)))	3337	if (expect_false (ev_is_active (w)))
2939	return;	3338	return;
…		…
2965		3364
2966	ev_stop (EV_A_ (W)w);	3365	ev_stop (EV_A_ (W)w);
2967		3366
2968	EV_FREQUENT_CHECK;	3367	EV_FREQUENT_CHECK;
2969	}	3368	}
		3369	#endif
2970		3370
		3371	#if EV_CHECK_ENABLE
2971	void	3372	void
2972	ev_check_start (EV_P_ ev_check *w)	3373	ev_check_start (EV_P_ ev_check *w)
2973	{	3374	{
2974	if (expect_false (ev_is_active (w)))	3375	if (expect_false (ev_is_active (w)))
2975	return;	3376	return;
…		…
3001		3402
3002	ev_stop (EV_A_ (W)w);	3403	ev_stop (EV_A_ (W)w);
3003		3404
3004	EV_FREQUENT_CHECK;	3405	EV_FREQUENT_CHECK;
3005	}	3406	}
		3407	#endif
3006		3408
3007	#if EV_EMBED_ENABLE	3409	#if EV_EMBED_ENABLE
3008	void noinline	3410	void noinline
3009	ev_embed_sweep (EV_P_ ev_embed *w)	3411	ev_embed_sweep (EV_P_ ev_embed *w)
3010	{	3412	{
…		…
3026	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3428	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3027	{	3429	{
3028	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));	3430	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3029		3431
3030	{	3432	{
3031	struct ev_loop *loop = w->other;	3433	EV_P = w->other;
3032		3434
3033	while (fdchangecnt)	3435	while (fdchangecnt)
3034	{	3436	{
3035	fd_reify (EV_A);	3437	fd_reify (EV_A);
3036	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3438	ev_loop (EV_A_ EVLOOP_NONBLOCK);
…		…
3044	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));	3446	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3045		3447
3046	ev_embed_stop (EV_A_ w);	3448	ev_embed_stop (EV_A_ w);
3047		3449
3048	{	3450	{
3049	struct ev_loop *loop = w->other;	3451	EV_P = w->other;
3050		3452
3051	ev_loop_fork (EV_A);	3453	ev_loop_fork (EV_A);
3052	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3454	ev_loop (EV_A_ EVLOOP_NONBLOCK);
3053	}	3455	}
3054		3456
…		…
3068	{	3470	{
3069	if (expect_false (ev_is_active (w)))	3471	if (expect_false (ev_is_active (w)))
3070	return;	3472	return;
3071		3473
3072	{	3474	{
3073	struct ev_loop *loop = w->other;	3475	EV_P = w->other;
3074	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3476	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3075	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3477	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3076	}	3478	}
3077		3479
3078	EV_FREQUENT_CHECK;	3480	EV_FREQUENT_CHECK;
…		…
3105		3507
3106	ev_io_stop (EV_A_ &w->io);	3508	ev_io_stop (EV_A_ &w->io);
3107	ev_prepare_stop (EV_A_ &w->prepare);	3509	ev_prepare_stop (EV_A_ &w->prepare);
3108	ev_fork_stop (EV_A_ &w->fork);	3510	ev_fork_stop (EV_A_ &w->fork);
3109		3511
		3512	ev_stop (EV_A_ (W)w);
		3513
3110	EV_FREQUENT_CHECK;	3514	EV_FREQUENT_CHECK;
3111	}	3515	}
3112	#endif	3516	#endif
3113		3517
3114	#if EV_FORK_ENABLE	3518	#if EV_FORK_ENABLE
…		…
3190		3594
3191	void	3595	void
3192	ev_async_send (EV_P_ ev_async *w)	3596	ev_async_send (EV_P_ ev_async *w)
3193	{	3597	{
3194	w->sent = 1;	3598	w->sent = 1;
3195	evpipe_write (EV_A_ &gotasync);	3599	evpipe_write (EV_A_ &async_pending);
3196	}	3600	}
3197	#endif	3601	#endif
3198		3602
3199	/*****************************************************************************/	3603	/*****************************************************************************/
3200		3604
…		…
3337	if (types & EV_ASYNC)	3741	if (types & EV_ASYNC)
3338	for (i = asynccnt; i--; )	3742	for (i = asynccnt; i--; )
3339	cb (EV_A_ EV_ASYNC, asyncs [i]);	3743	cb (EV_A_ EV_ASYNC, asyncs [i]);
3340	#endif	3744	#endif
3341		3745
		3746	#if EV_PREPARE_ENABLE
3342	if (types & EV_PREPARE)	3747	if (types & EV_PREPARE)
3343	for (i = preparecnt; i--; )	3748	for (i = preparecnt; i--; )
3344	#if EV_EMBED_ENABLE	3749	# if EV_EMBED_ENABLE
3345	if (ev_cb (prepares [i]) != embed_prepare_cb)	3750	if (ev_cb (prepares [i]) != embed_prepare_cb)
3346	#endif	3751	# endif
3347	cb (EV_A_ EV_PREPARE, prepares [i]);	3752	cb (EV_A_ EV_PREPARE, prepares [i]);
		3753	#endif
3348		3754
		3755	#if EV_CHECK_ENABLE
3349	if (types & EV_CHECK)	3756	if (types & EV_CHECK)
3350	for (i = checkcnt; i--; )	3757	for (i = checkcnt; i--; )
3351	cb (EV_A_ EV_CHECK, checks [i]);	3758	cb (EV_A_ EV_CHECK, checks [i]);
		3759	#endif
3352		3760
		3761	#if EV_SIGNAL_ENABLE
3353	if (types & EV_SIGNAL)	3762	if (types & EV_SIGNAL)
3354	for (i = 0; i < signalmax; ++i)	3763	for (i = 0; i < EV_NSIG - 1; ++i)
3355	for (wl = signals [i].head; wl; )	3764	for (wl = signals [i].head; wl; )
3356	{	3765	{
3357	wn = wl->next;	3766	wn = wl->next;
3358	cb (EV_A_ EV_SIGNAL, wl);	3767	cb (EV_A_ EV_SIGNAL, wl);
3359	wl = wn;	3768	wl = wn;
3360	}	3769	}
		3770	#endif
3361		3771
		3772	#if EV_CHILD_ENABLE
3362	if (types & EV_CHILD)	3773	if (types & EV_CHILD)
3363	for (i = EV_PID_HASHSIZE; i--; )	3774	for (i = EV_PID_HASHSIZE; i--; )
3364	for (wl = childs [i]; wl; )	3775	for (wl = childs [i]; wl; )
3365	{	3776	{
3366	wn = wl->next;	3777	wn = wl->next;
3367	cb (EV_A_ EV_CHILD, wl);	3778	cb (EV_A_ EV_CHILD, wl);
3368	wl = wn;	3779	wl = wn;
3369	}	3780	}
		3781	#endif
3370	/* EV_STAT 0x00001000 /* stat data changed */	3782	/* EV_STAT 0x00001000 /* stat data changed */
3371	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */	3783	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3372	}	3784	}
3373	#endif	3785	#endif
3374		3786

Diff Legend

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