[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.292 by root, Mon Jun 29 07:22:56 2009 UTC vs.
Revision 1.331 by root, Tue Mar 9 08:55:03 2010 UTC

…		…
1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without modifica-	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:	8	* tion, are permitted provided that the following conditions are met:
9	*	9	*
110	# define EV_USE_EPOLL 0	110	# define EV_USE_EPOLL 0
111	# endif	111	# endif
112	# endif	112	# endif
113		113
114	# ifndef EV_USE_KQUEUE	114	# ifndef EV_USE_KQUEUE
115	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	115	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
116	# define EV_USE_KQUEUE 1	116	# define EV_USE_KQUEUE 1
117	# else	117	# else
118	# define EV_USE_KQUEUE 0	118	# define EV_USE_KQUEUE 0
119	# endif	119	# endif
120	# endif	120	# endif
…		…
133	# else	133	# else
134	# define EV_USE_INOTIFY 0	134	# define EV_USE_INOTIFY 0
135	# endif	135	# endif
136	# endif	136	# endif
137		137
		138	# ifndef EV_USE_SIGNALFD
		139	# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
		140	# define EV_USE_SIGNALFD 1
		141	# else
		142	# define EV_USE_SIGNALFD 0
		143	# endif
		144	# endif
		145
138	# ifndef EV_USE_EVENTFD	146	# ifndef EV_USE_EVENTFD
139	# if HAVE_EVENTFD	147	# if HAVE_EVENTFD
140	# define EV_USE_EVENTFD 1	148	# define EV_USE_EVENTFD 1
141	# else	149	# else
142	# define EV_USE_EVENTFD 0	150	# define EV_USE_EVENTFD 0
…		…
145		153
146	#endif	154	#endif
147		155
148	#include <math.h>	156	#include <math.h>
149	#include <stdlib.h>	157	#include <stdlib.h>
		158	#include <string.h>
150	#include <fcntl.h>	159	#include <fcntl.h>
151	#include <stddef.h>	160	#include <stddef.h>
152		161
153	#include <stdio.h>	162	#include <stdio.h>
154		163
155	#include <assert.h>	164	#include <assert.h>
156	#include <errno.h>	165	#include <errno.h>
157	#include <sys/types.h>	166	#include <sys/types.h>
158	#include <time.h>	167	#include <time.h>
		168	#include <limits.h>
159		169
160	#include <signal.h>	170	#include <signal.h>
161		171
162	#ifdef EV_H	172	#ifdef EV_H
163	# include EV_H	173	# include EV_H
…		…
174	# define WIN32_LEAN_AND_MEAN	184	# define WIN32_LEAN_AND_MEAN
175	# include <windows.h>	185	# include <windows.h>
176	# ifndef EV_SELECT_IS_WINSOCKET	186	# ifndef EV_SELECT_IS_WINSOCKET
177	# define EV_SELECT_IS_WINSOCKET 1	187	# define EV_SELECT_IS_WINSOCKET 1
178	# endif	188	# endif
		189	# undef EV_AVOID_STDIO
179	#endif	190	#endif
180		191
181	/* this block tries to deduce configuration from header-defined symbols and defaults */	192	/* this block tries to deduce configuration from header-defined symbols and defaults */
		193
		194	/* try to deduce the maximum number of signals on this platform */
		195	#if defined (EV_NSIG)
		196	/* use what's provided */
		197	#elif defined (NSIG)
		198	# define EV_NSIG (NSIG)
		199	#elif defined(_NSIG)
		200	# define EV_NSIG (_NSIG)
		201	#elif defined (SIGMAX)
		202	# define EV_NSIG (SIGMAX+1)
		203	#elif defined (SIG_MAX)
		204	# define EV_NSIG (SIG_MAX+1)
		205	#elif defined (_SIG_MAX)
		206	# define EV_NSIG (_SIG_MAX+1)
		207	#elif defined (MAXSIG)
		208	# define EV_NSIG (MAXSIG+1)
		209	#elif defined (MAX_SIG)
		210	# define EV_NSIG (MAX_SIG+1)
		211	#elif defined (SIGARRAYSIZE)
		212	# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
		213	#elif defined (_sys_nsig)
		214	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		215	#else
		216	# error "unable to find value for NSIG, please report"
		217	/* to make it compile regardless, just remove the above line */
		218	# define EV_NSIG 65
		219	#endif
182		220
183	#ifndef EV_USE_CLOCK_SYSCALL	221	#ifndef EV_USE_CLOCK_SYSCALL
184	# if __linux && __GLIBC__ >= 2	222	# if __linux && __GLIBC__ >= 2
185	# define EV_USE_CLOCK_SYSCALL 1	223	# define EV_USE_CLOCK_SYSCALL 1
186	# else	224	# else
…		…
263	#ifndef EV_USE_EVENTFD	301	#ifndef EV_USE_EVENTFD
264	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))	302	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
265	# define EV_USE_EVENTFD 1	303	# define EV_USE_EVENTFD 1
266	# else	304	# else
267	# define EV_USE_EVENTFD 0	305	# define EV_USE_EVENTFD 0
		306	# endif
		307	#endif
		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
268	# endif	314	# endif
269	#endif	315	#endif
270		316
271	#if 0 /* debugging */	317	#if 0 /* debugging */
272	# define EV_VERIFY 3	318	# define EV_VERIFY 3
…		…
300	# endif	346	# endif
301	#endif	347	#endif
302		348
303	/* 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 */
304		350
		351	#ifdef _AIX
		352	/* AIX has a completely broken poll.h header */
		353	# undef EV_USE_POLL
		354	# define EV_USE_POLL 0
		355	#endif
		356
305	#ifndef CLOCK_MONOTONIC	357	#ifndef CLOCK_MONOTONIC
306	# undef EV_USE_MONOTONIC	358	# undef EV_USE_MONOTONIC
307	# define EV_USE_MONOTONIC 0	359	# define EV_USE_MONOTONIC 0
308	#endif	360	#endif
309		361
…		…
339	#endif	391	#endif
340		392
341	#if EV_USE_EVENTFD	393	#if EV_USE_EVENTFD
342	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	394	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
343	# include <stdint.h>	395	# include <stdint.h>
		396	# ifndef EFD_NONBLOCK
		397	# define EFD_NONBLOCK O_NONBLOCK
		398	# endif
		399	# ifndef EFD_CLOEXEC
		400	# ifdef O_CLOEXEC
		401	# define EFD_CLOEXEC O_CLOEXEC
		402	# else
		403	# define EFD_CLOEXEC 02000000
		404	# endif
		405	# endif
344	# ifdef __cplusplus	406	# ifdef __cplusplus
345	extern "C" {	407	extern "C" {
346	# endif	408	# endif
347	int eventfd (unsigned int initval, int flags);	409	int (eventfd) (unsigned int initval, int flags);
348	# ifdef __cplusplus	410	# ifdef __cplusplus
349	}	411	}
350	# endif	412	# endif
351	#endif	413	#endif
		414
		415	#if EV_USE_SIGNALFD
		416	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		417	# include <stdint.h>
		418	# ifndef SFD_NONBLOCK
		419	# define SFD_NONBLOCK O_NONBLOCK
		420	# endif
		421	# ifndef SFD_CLOEXEC
		422	# ifdef O_CLOEXEC
		423	# define SFD_CLOEXEC O_CLOEXEC
		424	# else
		425	# define SFD_CLOEXEC 02000000
		426	# endif
		427	# endif
		428	# ifdef __cplusplus
		429	extern "C" {
		430	# endif
		431	int signalfd (int fd, const sigset_t *mask, int flags);
		432
		433	struct signalfd_siginfo
		434	{
		435	uint32_t ssi_signo;
		436	char pad[128 - sizeof (uint32_t)];
		437	};
		438	# ifdef __cplusplus
		439	}
		440	# endif
		441	#endif
		442
352		443
353	/**/	444	/**/
354		445
355	#if EV_VERIFY >= 3	446	#if EV_VERIFY >= 3
356	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	447	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
…		…
368	*/	459	*/
369	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	460	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
370		461
371	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	462	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
372	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	463	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
373	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
374		464
375	#if __GNUC__ >= 4	465	#if __GNUC__ >= 4
376	# define expect(expr,value) __builtin_expect ((expr),(value))	466	# define expect(expr,value) __builtin_expect ((expr),(value))
377	# define noinline __attribute__ ((noinline))	467	# define noinline __attribute__ ((noinline))
378	#else	468	#else
…		…
391	# define inline_speed static noinline	481	# define inline_speed static noinline
392	#else	482	#else
393	# define inline_speed static inline	483	# define inline_speed static inline
394	#endif	484	#endif
395		485
396	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	486	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		487
		488	#if EV_MINPRI == EV_MAXPRI
		489	# define ABSPRI(w) (((W)w), 0)
		490	#else
397	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)	491	# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		492	#endif
398		493
399	#define EMPTY /* required for microsofts broken pseudo-c compiler */	494	#define EMPTY /* required for microsofts broken pseudo-c compiler */
400	#define EMPTY2(a,b) /* used to suppress some warnings */	495	#define EMPTY2(a,b) /* used to suppress some warnings */
401		496
402	typedef ev_watcher *W;	497	typedef ev_watcher *W;
…		…
414		509
415	#if EV_USE_MONOTONIC	510	#if EV_USE_MONOTONIC
416	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	511	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
417	#endif	512	#endif
418		513
		514	#ifndef EV_FD_TO_WIN32_HANDLE
		515	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		516	#endif
		517	#ifndef EV_WIN32_HANDLE_TO_FD
		518	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		519	#endif
		520	#ifndef EV_WIN32_CLOSE_FD
		521	# define EV_WIN32_CLOSE_FD(fd) close (fd)
		522	#endif
		523
419	#ifdef _WIN32	524	#ifdef _WIN32
420	# include "ev_win32.c"	525	# include "ev_win32.c"
421	#endif	526	#endif
422		527
423	/*****************************************************************************/	528	/*****************************************************************************/
		529
		530	#if EV_AVOID_STDIO
		531	static void noinline
		532	ev_printerr (const char *msg)
		533	{
		534	write (STDERR_FILENO, msg, strlen (msg));
		535	}
		536	#endif
424		537
425	static void (syserr_cb)(const char msg);	538	static void (syserr_cb)(const char msg);
426		539
427	void	540	void
428	ev_set_syserr_cb (void (cb)(const char msg))	541	ev_set_syserr_cb (void (cb)(const char msg))
…		…
438		551
439	if (syserr_cb)	552	if (syserr_cb)
440	syserr_cb (msg);	553	syserr_cb (msg);
441	else	554	else
442	{	555	{
		556	#if EV_AVOID_STDIO
		557	const char *err = strerror (errno);
		558
		559	ev_printerr (msg);
		560	ev_printerr (": ");
		561	ev_printerr (err);
		562	ev_printerr ("\n");
		563	#else
443	perror (msg);	564	perror (msg);
		565	#endif
444	abort ();	566	abort ();
445	}	567	}
446	}	568	}
447		569
448	static void *	570	static void *
…		…
473	{	595	{
474	ptr = alloc (ptr, size);	596	ptr = alloc (ptr, size);
475		597
476	if (!ptr && size)	598	if (!ptr && size)
477	{	599	{
		600	#if EV_AVOID_STDIO
		601	ev_printerr ("libev: memory allocation failed, aborting.\n");
		602	#else
478	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	603	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		604	#endif
479	abort ();	605	abort ();
480	}	606	}
481		607
482	return ptr;	608	return ptr;
483	}	609	}
…		…
485	#define ev_malloc(size) ev_realloc (0, (size))	611	#define ev_malloc(size) ev_realloc (0, (size))
486	#define ev_free(ptr) ev_realloc ((ptr), 0)	612	#define ev_free(ptr) ev_realloc ((ptr), 0)
487		613
488	/*****************************************************************************/	614	/*****************************************************************************/
489		615
		616	/* set in reify when reification needed */
		617	#define EV_ANFD_REIFY 1
		618
490	/* file descriptor info structure */	619	/* file descriptor info structure */
491	typedef struct	620	typedef struct
492	{	621	{
493	WL head;	622	WL head;
494	unsigned char events; /* the events watched for */	623	unsigned char events; /* the events watched for */
495	unsigned char reify; /* flag set when this ANFD needs reification */	624	unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
496	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */	625	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
497	unsigned char unused;	626	unsigned char unused;
498	#if EV_USE_EPOLL	627	#if EV_USE_EPOLL
499	unsigned int egen; /* generation counter to counter epoll bugs */	628	unsigned int egen; /* generation counter to counter epoll bugs */
500	#endif	629	#endif
…		…
562		691
563	static int ev_default_loop_ptr;	692	static int ev_default_loop_ptr;
564		693
565	#endif	694	#endif
566		695
		696	#if EV_MINIMAL < 2
		697	# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
		698	# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
		699	# define EV_INVOKE_PENDING invoke_cb (EV_A)
		700	#else
		701	# define EV_RELEASE_CB (void)0
		702	# define EV_ACQUIRE_CB (void)0
		703	# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
		704	#endif
		705
		706	#define EVUNLOOP_RECURSE 0x80
		707
567	/*****************************************************************************/	708	/*****************************************************************************/
568		709
569	#ifndef EV_HAVE_EV_TIME	710	#ifndef EV_HAVE_EV_TIME
570	ev_tstamp	711	ev_tstamp
571	ev_time (void)	712	ev_time (void)
…		…
627		768
628	tv.tv_sec = (time_t)delay;	769	tv.tv_sec = (time_t)delay;
629	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	770	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
630		771
631	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	772	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
632	/* somehting nto guaranteed by newer posix versions, but guaranteed */	773	/* something not guaranteed by newer posix versions, but guaranteed */
633	/* by older ones */	774	/* by older ones */
634	select (0, 0, 0, 0, &tv);	775	select (0, 0, 0, 0, &tv);
635	#endif	776	#endif
636	}	777	}
637	}	778	}
…		…
745	}	886	}
746		887
747	/*****************************************************************************/	888	/*****************************************************************************/
748		889
749	inline_speed void	890	inline_speed void
750	fd_event (EV_P_ int fd, int revents)	891	fd_event_nc (EV_P_ int fd, int revents)
751	{	892	{
752	ANFD *anfd = anfds + fd;	893	ANFD *anfd = anfds + fd;
753	ev_io *w;	894	ev_io *w;
754		895
755	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	896	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
…		…
759	if (ev)	900	if (ev)
760	ev_feed_event (EV_A_ (W)w, ev);	901	ev_feed_event (EV_A_ (W)w, ev);
761	}	902	}
762	}	903	}
763		904
		905	/* do not submit kernel events for fds that have reify set */
		906	/* because that means they changed while we were polling for new events */
		907	inline_speed void
		908	fd_event (EV_P_ int fd, int revents)
		909	{
		910	ANFD *anfd = anfds + fd;
		911
		912	if (expect_true (!anfd->reify))
		913	fd_event_nc (EV_A_ fd, revents);
		914	}
		915
764	void	916	void
765	ev_feed_fd_event (EV_P_ int fd, int revents)	917	ev_feed_fd_event (EV_P_ int fd, int revents)
766	{	918	{
767	if (fd >= 0 && fd < anfdmax)	919	if (fd >= 0 && fd < anfdmax)
768	fd_event (EV_A_ fd, revents);	920	fd_event_nc (EV_A_ fd, revents);
769	}	921	}
770		922
771	/* make sure the external fd watch events are in-sync */	923	/* make sure the external fd watch events are in-sync */
772	/* with the kernel/libev internal state */	924	/* with the kernel/libev internal state */
773	inline_size void	925	inline_size void
…		…
788		940
789	#if EV_SELECT_IS_WINSOCKET	941	#if EV_SELECT_IS_WINSOCKET
790	if (events)	942	if (events)
791	{	943	{
792	unsigned long arg;	944	unsigned long arg;
793	#ifdef EV_FD_TO_WIN32_HANDLE
794	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	945	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));	946	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
799	}	947	}
800	#endif	948	#endif
801		949
802	{	950	{
…		…
845	/* check whether the given fd is atcually valid, for error recovery */	993	/* check whether the given fd is atcually valid, for error recovery */
846	inline_size int	994	inline_size int
847	fd_valid (int fd)	995	fd_valid (int fd)
848	{	996	{
849	#ifdef _WIN32	997	#ifdef _WIN32
850	return _get_osfhandle (fd) != -1;	998	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
851	#else	999	#else
852	return fcntl (fd, F_GETFD) != -1;	1000	return fcntl (fd, F_GETFD) != -1;
853	#endif	1001	#endif
854	}	1002	}
855		1003
…		…
873		1021
874	for (fd = anfdmax; fd--; )	1022	for (fd = anfdmax; fd--; )
875	if (anfds [fd].events)	1023	if (anfds [fd].events)
876	{	1024	{
877	fd_kill (EV_A_ fd);	1025	fd_kill (EV_A_ fd);
878	return;	1026	break;
879	}	1027	}
880	}	1028	}
881		1029
882	/* usually called after fork if backend needs to re-arm all fds from scratch */	1030	/* usually called after fork if backend needs to re-arm all fds from scratch */
883	static void noinline	1031	static void noinline
…		…
888	for (fd = 0; fd < anfdmax; ++fd)	1036	for (fd = 0; fd < anfdmax; ++fd)
889	if (anfds [fd].events)	1037	if (anfds [fd].events)
890	{	1038	{
891	anfds [fd].events = 0;	1039	anfds [fd].events = 0;
892	anfds [fd].emask = 0;	1040	anfds [fd].emask = 0;
893	fd_change (EV_A_ fd, EV__IOFDSET \| 1);	1041	fd_change (EV_A_ fd, EV__IOFDSET \| EV_ANFD_REIFY);
894	}	1042	}
895	}	1043	}
896		1044
897	/*****************************************************************************/	1045	/*****************************************************************************/
898		1046
…		…
973		1121
974	for (;;)	1122	for (;;)
975	{	1123	{
976	int c = k << 1;	1124	int c = k << 1;
977		1125
978	if (c > N + HEAP0 - 1)	1126	if (c >= N + HEAP0)
979	break;	1127	break;
980		1128
981	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])	1129	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
982	? 1 : 0;	1130	? 1 : 0;
983		1131
…		…
1019		1167
1020	/* move an element suitably so it is in a correct place */	1168	/* move an element suitably so it is in a correct place */
1021	inline_size void	1169	inline_size void
1022	adjustheap (ANHE *heap, int N, int k)	1170	adjustheap (ANHE *heap, int N, int k)
1023	{	1171	{
1024	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1172	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1025	upheap (heap, k);	1173	upheap (heap, k);
1026	else	1174	else
1027	downheap (heap, N, k);	1175	downheap (heap, N, k);
1028	}	1176	}
1029		1177
…		…
1042	/*****************************************************************************/	1190	/*****************************************************************************/
1043		1191
1044	/* associate signal watchers to a signal signal */	1192	/* associate signal watchers to a signal signal */
1045	typedef struct	1193	typedef struct
1046	{	1194	{
		1195	EV_ATOMIC_T pending;
		1196	#if EV_MULTIPLICITY
		1197	EV_P;
		1198	#endif
1047	WL head;	1199	WL head;
1048	EV_ATOMIC_T gotsig;
1049	} ANSIG;	1200	} ANSIG;
1050		1201
1051	static ANSIG *signals;	1202	static ANSIG signals [EV_NSIG - 1];
1052	static int signalmax;
1053
1054	static EV_ATOMIC_T gotsig;
1055		1203
1056	/*****************************************************************************/	1204	/*****************************************************************************/
1057		1205
1058	/* used to prepare libev internal fd's */	1206	/* used to prepare libev internal fd's */
1059	/* this is not fork-safe */	1207	/* this is not fork-safe */
1060	inline_speed void	1208	inline_speed void
1061	fd_intern (int fd)	1209	fd_intern (int fd)
1062	{	1210	{
1063	#ifdef _WIN32	1211	#ifdef _WIN32
1064	unsigned long arg = 1;	1212	unsigned long arg = 1;
1065	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1213	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1066	#else	1214	#else
1067	fcntl (fd, F_SETFD, FD_CLOEXEC);	1215	fcntl (fd, F_SETFD, FD_CLOEXEC);
1068	fcntl (fd, F_SETFL, O_NONBLOCK);	1216	fcntl (fd, F_SETFL, O_NONBLOCK);
1069	#endif	1217	#endif
1070	}	1218	}
…		…
1073	evpipe_init (EV_P)	1221	evpipe_init (EV_P)
1074	{	1222	{
1075	if (!ev_is_active (&pipe_w))	1223	if (!ev_is_active (&pipe_w))
1076	{	1224	{
1077	#if EV_USE_EVENTFD	1225	#if EV_USE_EVENTFD
		1226	evfd = eventfd (0, EFD_NONBLOCK \| EFD_CLOEXEC);
		1227	if (evfd < 0 && errno == EINVAL)
1078	if ((evfd = eventfd (0, 0)) >= 0)	1228	evfd = eventfd (0, 0);
		1229
		1230	if (evfd >= 0)
1079	{	1231	{
1080	evpipe [0] = -1;	1232	evpipe [0] = -1;
1081	fd_intern (evfd);	1233	fd_intern (evfd); /* doing it twice doesn't hurt */
1082	ev_io_set (&pipe_w, evfd, EV_READ);	1234	ev_io_set (&pipe_w, evfd, EV_READ);
1083	}	1235	}
1084	else	1236	else
1085	#endif	1237	#endif
1086	{	1238	{
…		…
1123	/* called whenever the libev signal pipe */	1275	/* called whenever the libev signal pipe */
1124	/* got some events (signal, async) */	1276	/* got some events (signal, async) */
1125	static void	1277	static void
1126	pipecb (EV_P_ ev_io *iow, int revents)	1278	pipecb (EV_P_ ev_io *iow, int revents)
1127	{	1279	{
		1280	int i;
		1281
1128	#if EV_USE_EVENTFD	1282	#if EV_USE_EVENTFD
1129	if (evfd >= 0)	1283	if (evfd >= 0)
1130	{	1284	{
1131	uint64_t counter;	1285	uint64_t counter;
1132	read (evfd, &counter, sizeof (uint64_t));	1286	read (evfd, &counter, sizeof (uint64_t));
…		…
1136	{	1290	{
1137	char dummy;	1291	char dummy;
1138	read (evpipe [0], &dummy, 1);	1292	read (evpipe [0], &dummy, 1);
1139	}	1293	}
1140		1294
1141	if (gotsig && ev_is_default_loop (EV_A))	1295	if (sig_pending)
1142	{	1296	{
1143	int signum;	1297	sig_pending = 0;
1144	gotsig = 0;
1145		1298
1146	for (signum = signalmax; signum--; )	1299	for (i = EV_NSIG - 1; i--; )
1147	if (signals [signum].gotsig)	1300	if (expect_false (signals [i].pending))
1148	ev_feed_signal_event (EV_A_ signum + 1);	1301	ev_feed_signal_event (EV_A_ i + 1);
1149	}	1302	}
1150		1303
1151	#if EV_ASYNC_ENABLE	1304	#if EV_ASYNC_ENABLE
1152	if (gotasync)	1305	if (async_pending)
1153	{	1306	{
1154	int i;	1307	async_pending = 0;
1155	gotasync = 0;
1156		1308
1157	for (i = asynccnt; i--; )	1309	for (i = asynccnt; i--; )
1158	if (asyncs [i]->sent)	1310	if (asyncs [i]->sent)
1159	{	1311	{
1160	asyncs [i]->sent = 0;	1312	asyncs [i]->sent = 0;
…		…
1168		1320
1169	static void	1321	static void
1170	ev_sighandler (int signum)	1322	ev_sighandler (int signum)
1171	{	1323	{
1172	#if EV_MULTIPLICITY	1324	#if EV_MULTIPLICITY
1173	struct ev_loop *loop = &default_loop_struct;	1325	EV_P = signals [signum - 1].loop;
1174	#endif	1326	#endif
1175		1327
1176	#if _WIN32	1328	#ifdef _WIN32
1177	signal (signum, ev_sighandler);	1329	signal (signum, ev_sighandler);
1178	#endif	1330	#endif
1179		1331
1180	signals [signum - 1].gotsig = 1;	1332	signals [signum - 1].pending = 1;
1181	evpipe_write (EV_A_ &gotsig);	1333	evpipe_write (EV_A_ &sig_pending);
1182	}	1334	}
1183		1335
1184	void noinline	1336	void noinline
1185	ev_feed_signal_event (EV_P_ int signum)	1337	ev_feed_signal_event (EV_P_ int signum)
1186	{	1338	{
1187	WL w;	1339	WL w;
1188		1340
		1341	if (expect_false (signum <= 0 \|\| signum > EV_NSIG))
		1342	return;
		1343
		1344	--signum;
		1345
1189	#if EV_MULTIPLICITY	1346	#if EV_MULTIPLICITY
1190	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1347	/* it is permissible to try to feed a signal to the wrong loop */
1191	#endif	1348	/* or, likely more useful, feeding a signal nobody is waiting for */
1192		1349
1193	--signum;	1350	if (expect_false (signals [signum].loop != EV_A))
1194
1195	if (signum < 0 \|\| signum >= signalmax)
1196	return;	1351	return;
		1352	#endif
1197		1353
1198	signals [signum].gotsig = 0;	1354	signals [signum].pending = 0;
1199		1355
1200	for (w = signals [signum].head; w; w = w->next)	1356	for (w = signals [signum].head; w; w = w->next)
1201	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1357	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1202	}	1358	}
		1359
		1360	#if EV_USE_SIGNALFD
		1361	static void
		1362	sigfdcb (EV_P_ ev_io *iow, int revents)
		1363	{
		1364	struct signalfd_siginfo si[2], sip; / these structs are big */
		1365
		1366	for (;;)
		1367	{
		1368	ssize_t res = read (sigfd, si, sizeof (si));
		1369
		1370	/* not ISO-C, as res might be -1, but works with SuS */
		1371	for (sip = si; (char )sip < (char )si + res; ++sip)
		1372	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1373
		1374	if (res < (ssize_t)sizeof (si))
		1375	break;
		1376	}
		1377	}
		1378	#endif
1203		1379
1204	/*****************************************************************************/	1380	/*****************************************************************************/
1205		1381
1206	static WL childs [EV_PID_HASHSIZE];	1382	static WL childs [EV_PID_HASHSIZE];
1207		1383
…		…
1352	ev_backend (EV_P)	1528	ev_backend (EV_P)
1353	{	1529	{
1354	return backend;	1530	return backend;
1355	}	1531	}
1356		1532
		1533	#if EV_MINIMAL < 2
1357	unsigned int	1534	unsigned int
1358	ev_loop_count (EV_P)	1535	ev_loop_count (EV_P)
1359	{	1536	{
1360	return loop_count;	1537	return loop_count;
1361	}	1538	}
1362		1539
		1540	unsigned int
		1541	ev_loop_depth (EV_P)
		1542	{
		1543	return loop_depth;
		1544	}
		1545
1363	void	1546	void
1364	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)	1547	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1365	{	1548	{
1366	io_blocktime = interval;	1549	io_blocktime = interval;
1367	}	1550	}
…		…
1369	void	1552	void
1370	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)	1553	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1371	{	1554	{
1372	timeout_blocktime = interval;	1555	timeout_blocktime = interval;
1373	}	1556	}
		1557
		1558	void
		1559	ev_set_userdata (EV_P_ void *data)
		1560	{
		1561	userdata = data;
		1562	}
		1563
		1564	void *
		1565	ev_userdata (EV_P)
		1566	{
		1567	return userdata;
		1568	}
		1569
		1570	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
		1571	{
		1572	invoke_cb = invoke_pending_cb;
		1573	}
		1574
		1575	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
		1576	{
		1577	release_cb = release;
		1578	acquire_cb = acquire;
		1579	}
		1580	#endif
1374		1581
1375	/* initialise a loop structure, must be zero-initialised */	1582	/* initialise a loop structure, must be zero-initialised */
1376	static void noinline	1583	static void noinline
1377	loop_init (EV_P_ unsigned int flags)	1584	loop_init (EV_P_ unsigned int flags)
1378	{	1585	{
…		…
1396	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1603	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1397	have_monotonic = 1;	1604	have_monotonic = 1;
1398	}	1605	}
1399	#endif	1606	#endif
1400		1607
		1608	/* pid check not overridable via env */
		1609	#ifndef _WIN32
		1610	if (flags & EVFLAG_FORKCHECK)
		1611	curpid = getpid ();
		1612	#endif
		1613
		1614	if (!(flags & EVFLAG_NOENV)
		1615	&& !enable_secure ()
		1616	&& getenv ("LIBEV_FLAGS"))
		1617	flags = atoi (getenv ("LIBEV_FLAGS"));
		1618
1401	ev_rt_now = ev_time ();	1619	ev_rt_now = ev_time ();
1402	mn_now = get_clock ();	1620	mn_now = get_clock ();
1403	now_floor = mn_now;	1621	now_floor = mn_now;
1404	rtmn_diff = ev_rt_now - mn_now;	1622	rtmn_diff = ev_rt_now - mn_now;
		1623	#if EV_MINIMAL < 2
		1624	invoke_cb = ev_invoke_pending;
		1625	#endif
1405		1626
1406	io_blocktime = 0.;	1627	io_blocktime = 0.;
1407	timeout_blocktime = 0.;	1628	timeout_blocktime = 0.;
1408	backend = 0;	1629	backend = 0;
1409	backend_fd = -1;	1630	backend_fd = -1;
1410	gotasync = 0;	1631	sig_pending = 0;
		1632	#if EV_ASYNC_ENABLE
		1633	async_pending = 0;
		1634	#endif
1411	#if EV_USE_INOTIFY	1635	#if EV_USE_INOTIFY
1412	fs_fd = -2;	1636	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1413	#endif	1637	#endif
1414		1638	#if EV_USE_SIGNALFD
1415	/* pid check not overridable via env */	1639	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1416	#ifndef _WIN32
1417	if (flags & EVFLAG_FORKCHECK)
1418	curpid = getpid ();
1419	#endif	1640	#endif
1420
1421	if (!(flags & EVFLAG_NOENV)
1422	&& !enable_secure ()
1423	&& getenv ("LIBEV_FLAGS"))
1424	flags = atoi (getenv ("LIBEV_FLAGS"));
1425		1641
1426	if (!(flags & 0x0000ffffU))	1642	if (!(flags & 0x0000ffffU))
1427	flags \|= ev_recommended_backends ();	1643	flags \|= ev_recommended_backends ();
1428		1644
1429	#if EV_USE_PORT	1645	#if EV_USE_PORT
…		…
1455	{	1671	{
1456	int i;	1672	int i;
1457		1673
1458	if (ev_is_active (&pipe_w))	1674	if (ev_is_active (&pipe_w))
1459	{	1675	{
1460	ev_ref (EV_A); /* signal watcher */	1676	/ev_ref (EV_A);/
1461	ev_io_stop (EV_A_ &pipe_w);	1677	/ev_io_stop (EV_A_ &pipe_w);/
1462		1678
1463	#if EV_USE_EVENTFD	1679	#if EV_USE_EVENTFD
1464	if (evfd >= 0)	1680	if (evfd >= 0)
1465	close (evfd);	1681	close (evfd);
1466	#endif	1682	#endif
1467		1683
1468	if (evpipe [0] >= 0)	1684	if (evpipe [0] >= 0)
1469	{	1685	{
1470	close (evpipe [0]);	1686	EV_WIN32_CLOSE_FD (evpipe [0]);
1471	close (evpipe [1]);	1687	EV_WIN32_CLOSE_FD (evpipe [1]);
1472	}	1688	}
1473	}	1689	}
		1690
		1691	#if EV_USE_SIGNALFD
		1692	if (ev_is_active (&sigfd_w))
		1693	close (sigfd);
		1694	#endif
1474		1695
1475	#if EV_USE_INOTIFY	1696	#if EV_USE_INOTIFY
1476	if (fs_fd >= 0)	1697	if (fs_fd >= 0)
1477	close (fs_fd);	1698	close (fs_fd);
1478	#endif	1699	#endif
…		…
1502	#if EV_IDLE_ENABLE	1723	#if EV_IDLE_ENABLE
1503	array_free (idle, [i]);	1724	array_free (idle, [i]);
1504	#endif	1725	#endif
1505	}	1726	}
1506		1727
1507	ev_free (anfds); anfdmax = 0;	1728	ev_free (anfds); anfds = 0; anfdmax = 0;
1508		1729
1509	/* have to use the microsoft-never-gets-it-right macro */	1730	/* have to use the microsoft-never-gets-it-right macro */
1510	array_free (rfeed, EMPTY);	1731	array_free (rfeed, EMPTY);
1511	array_free (fdchange, EMPTY);	1732	array_free (fdchange, EMPTY);
1512	array_free (timer, EMPTY);	1733	array_free (timer, EMPTY);
…		…
1547		1768
1548	if (ev_is_active (&pipe_w))	1769	if (ev_is_active (&pipe_w))
1549	{	1770	{
1550	/* this "locks" the handlers against writing to the pipe */	1771	/* this "locks" the handlers against writing to the pipe */
1551	/* while we modify the fd vars */	1772	/* while we modify the fd vars */
1552	gotsig = 1;	1773	sig_pending = 1;
1553	#if EV_ASYNC_ENABLE	1774	#if EV_ASYNC_ENABLE
1554	gotasync = 1;	1775	async_pending = 1;
1555	#endif	1776	#endif
1556		1777
1557	ev_ref (EV_A);	1778	ev_ref (EV_A);
1558	ev_io_stop (EV_A_ &pipe_w);	1779	ev_io_stop (EV_A_ &pipe_w);
1559		1780
…		…
1562	close (evfd);	1783	close (evfd);
1563	#endif	1784	#endif
1564		1785
1565	if (evpipe [0] >= 0)	1786	if (evpipe [0] >= 0)
1566	{	1787	{
1567	close (evpipe [0]);	1788	EV_WIN32_CLOSE_FD (evpipe [0]);
1568	close (evpipe [1]);	1789	EV_WIN32_CLOSE_FD (evpipe [1]);
1569	}	1790	}
1570		1791
1571	evpipe_init (EV_A);	1792	evpipe_init (EV_A);
1572	/* now iterate over everything, in case we missed something */	1793	/* now iterate over everything, in case we missed something */
1573	pipecb (EV_A_ &pipe_w, EV_READ);	1794	pipecb (EV_A_ &pipe_w, EV_READ);
…		…
1579	#if EV_MULTIPLICITY	1800	#if EV_MULTIPLICITY
1580		1801
1581	struct ev_loop *	1802	struct ev_loop *
1582	ev_loop_new (unsigned int flags)	1803	ev_loop_new (unsigned int flags)
1583	{	1804	{
1584	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));	1805	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1585		1806
1586	memset (loop, 0, sizeof (struct ev_loop));	1807	memset (EV_A, 0, sizeof (struct ev_loop));
1587
1588	loop_init (EV_A_ flags);	1808	loop_init (EV_A_ flags);
1589		1809
1590	if (ev_backend (EV_A))	1810	if (ev_backend (EV_A))
1591	return loop;	1811	return EV_A;
1592		1812
1593	return 0;	1813	return 0;
1594	}	1814	}
1595		1815
1596	void	1816	void
…		…
1603	void	1823	void
1604	ev_loop_fork (EV_P)	1824	ev_loop_fork (EV_P)
1605	{	1825	{
1606	postfork = 1; /* must be in line with ev_default_fork */	1826	postfork = 1; /* must be in line with ev_default_fork */
1607	}	1827	}
		1828	#endif /* multiplicity */
1608		1829
1609	#if EV_VERIFY	1830	#if EV_VERIFY
1610	static void noinline	1831	static void noinline
1611	verify_watcher (EV_P_ W w)	1832	verify_watcher (EV_P_ W w)
1612	{	1833	{
…		…
1640	verify_watcher (EV_A_ ws [cnt]);	1861	verify_watcher (EV_A_ ws [cnt]);
1641	}	1862	}
1642	}	1863	}
1643	#endif	1864	#endif
1644		1865
		1866	#if EV_MINIMAL < 2
1645	void	1867	void
1646	ev_loop_verify (EV_P)	1868	ev_loop_verify (EV_P)
1647	{	1869	{
1648	#if EV_VERIFY	1870	#if EV_VERIFY
1649	int i;	1871	int i;
…		…
1698	assert (checkmax >= checkcnt);	1920	assert (checkmax >= checkcnt);
1699	array_verify (EV_A_ (W *)checks, checkcnt);	1921	array_verify (EV_A_ (W *)checks, checkcnt);
1700		1922
1701	# if 0	1923	# if 0
1702	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1924	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
1703	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)	1925	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1704	# endif
1705	#endif	1926	# endif
		1927	#endif
1706	}	1928	}
1707		1929	#endif
1708	#endif /* multiplicity */
1709		1930
1710	#if EV_MULTIPLICITY	1931	#if EV_MULTIPLICITY
1711	struct ev_loop *	1932	struct ev_loop *
1712	ev_default_loop_init (unsigned int flags)	1933	ev_default_loop_init (unsigned int flags)
1713	#else	1934	#else
…		…
1716	#endif	1937	#endif
1717	{	1938	{
1718	if (!ev_default_loop_ptr)	1939	if (!ev_default_loop_ptr)
1719	{	1940	{
1720	#if EV_MULTIPLICITY	1941	#if EV_MULTIPLICITY
1721	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1942	EV_P = ev_default_loop_ptr = &default_loop_struct;
1722	#else	1943	#else
1723	ev_default_loop_ptr = 1;	1944	ev_default_loop_ptr = 1;
1724	#endif	1945	#endif
1725		1946
1726	loop_init (EV_A_ flags);	1947	loop_init (EV_A_ flags);
…		…
1743		1964
1744	void	1965	void
1745	ev_default_destroy (void)	1966	ev_default_destroy (void)
1746	{	1967	{
1747	#if EV_MULTIPLICITY	1968	#if EV_MULTIPLICITY
1748	struct ev_loop *loop = ev_default_loop_ptr;	1969	EV_P = ev_default_loop_ptr;
1749	#endif	1970	#endif
1750		1971
1751	ev_default_loop_ptr = 0;	1972	ev_default_loop_ptr = 0;
1752		1973
1753	#ifndef _WIN32	1974	#ifndef _WIN32
…		…
1760		1981
1761	void	1982	void
1762	ev_default_fork (void)	1983	ev_default_fork (void)
1763	{	1984	{
1764	#if EV_MULTIPLICITY	1985	#if EV_MULTIPLICITY
1765	struct ev_loop *loop = ev_default_loop_ptr;	1986	EV_P = ev_default_loop_ptr;
1766	#endif	1987	#endif
1767		1988
1768	postfork = 1; /* must be in line with ev_loop_fork */	1989	postfork = 1; /* must be in line with ev_loop_fork */
1769	}	1990	}
1770		1991
…		…
1774	ev_invoke (EV_P_ void *w, int revents)	1995	ev_invoke (EV_P_ void *w, int revents)
1775	{	1996	{
1776	EV_CB_INVOKE ((W)w, revents);	1997	EV_CB_INVOKE ((W)w, revents);
1777	}	1998	}
1778		1999
1779	inline_speed void	2000	unsigned int
1780	call_pending (EV_P)	2001	ev_pending_count (EV_P)
		2002	{
		2003	int pri;
		2004	unsigned int count = 0;
		2005
		2006	for (pri = NUMPRI; pri--; )
		2007	count += pendingcnt [pri];
		2008
		2009	return count;
		2010	}
		2011
		2012	void noinline
		2013	ev_invoke_pending (EV_P)
1781	{	2014	{
1782	int pri;	2015	int pri;
1783		2016
1784	for (pri = NUMPRI; pri--; )	2017	for (pri = NUMPRI; pri--; )
1785	while (pendingcnt [pri])	2018	while (pendingcnt [pri])
…		…
1953	ANHE_at_cache (*he);	2186	ANHE_at_cache (*he);
1954	}	2187	}
1955	}	2188	}
1956		2189
1957	/* fetch new monotonic and realtime times from the kernel */	2190	/* fetch new monotonic and realtime times from the kernel */
1958	/* also detetc if there was a timejump, and act accordingly */	2191	/* also detect if there was a timejump, and act accordingly */
1959	inline_speed void	2192	inline_speed void
1960	time_update (EV_P_ ev_tstamp max_block)	2193	time_update (EV_P_ ev_tstamp max_block)
1961	{	2194	{
1962	#if EV_USE_MONOTONIC	2195	#if EV_USE_MONOTONIC
1963	if (expect_true (have_monotonic))	2196	if (expect_true (have_monotonic))
…		…
2020		2253
2021	mn_now = ev_rt_now;	2254	mn_now = ev_rt_now;
2022	}	2255	}
2023	}	2256	}
2024		2257
2025	static int loop_done;
2026
2027	void	2258	void
2028	ev_loop (EV_P_ int flags)	2259	ev_loop (EV_P_ int flags)
2029	{	2260	{
		2261	#if EV_MINIMAL < 2
		2262	++loop_depth;
		2263	#endif
		2264
		2265	assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
		2266
2030	loop_done = EVUNLOOP_CANCEL;	2267	loop_done = EVUNLOOP_CANCEL;
2031		2268
2032	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	2269	EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2033		2270
2034	do	2271	do
2035	{	2272	{
2036	#if EV_VERIFY >= 2	2273	#if EV_VERIFY >= 2
2037	ev_loop_verify (EV_A);	2274	ev_loop_verify (EV_A);
…		…
2050	/* we might have forked, so queue fork handlers */	2287	/* we might have forked, so queue fork handlers */
2051	if (expect_false (postfork))	2288	if (expect_false (postfork))
2052	if (forkcnt)	2289	if (forkcnt)
2053	{	2290	{
2054	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2291	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2055	call_pending (EV_A);	2292	EV_INVOKE_PENDING;
2056	}	2293	}
2057	#endif	2294	#endif
2058		2295
2059	/* queue prepare watchers (and execute them) */	2296	/* queue prepare watchers (and execute them) */
2060	if (expect_false (preparecnt))	2297	if (expect_false (preparecnt))
2061	{	2298	{
2062	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2299	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2063	call_pending (EV_A);	2300	EV_INVOKE_PENDING;
2064	}	2301	}
		2302
		2303	if (expect_false (loop_done))
		2304	break;
2065		2305
2066	/* we might have forked, so reify kernel state if necessary */	2306	/* we might have forked, so reify kernel state if necessary */
2067	if (expect_false (postfork))	2307	if (expect_false (postfork))
2068	loop_fork (EV_A);	2308	loop_fork (EV_A);
2069		2309
…		…
2075	ev_tstamp waittime = 0.;	2315	ev_tstamp waittime = 0.;
2076	ev_tstamp sleeptime = 0.;	2316	ev_tstamp sleeptime = 0.;
2077		2317
2078	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))	2318	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
2079	{	2319	{
		2320	/* remember old timestamp for io_blocktime calculation */
		2321	ev_tstamp prev_mn_now = mn_now;
		2322
2080	/* update time to cancel out callback processing overhead */	2323	/* update time to cancel out callback processing overhead */
2081	time_update (EV_A_ 1e100);	2324	time_update (EV_A_ 1e100);
2082		2325
2083	waittime = MAX_BLOCKTIME;	2326	waittime = MAX_BLOCKTIME;
2084		2327
…		…
2094	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2337	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2095	if (waittime > to) waittime = to;	2338	if (waittime > to) waittime = to;
2096	}	2339	}
2097	#endif	2340	#endif
2098		2341
		2342	/* don't let timeouts decrease the waittime below timeout_blocktime */
2099	if (expect_false (waittime < timeout_blocktime))	2343	if (expect_false (waittime < timeout_blocktime))
2100	waittime = timeout_blocktime;	2344	waittime = timeout_blocktime;
2101		2345
2102	sleeptime = waittime - backend_fudge;	2346	/* extra check because io_blocktime is commonly 0 */
2103
2104	if (expect_true (sleeptime > io_blocktime))	2347	if (expect_false (io_blocktime))
2105	sleeptime = io_blocktime;
2106
2107	if (sleeptime)
2108	{	2348	{
		2349	sleeptime = io_blocktime - (mn_now - prev_mn_now);
		2350
		2351	if (sleeptime > waittime - backend_fudge)
		2352	sleeptime = waittime - backend_fudge;
		2353
		2354	if (expect_true (sleeptime > 0.))
		2355	{
2109	ev_sleep (sleeptime);	2356	ev_sleep (sleeptime);
2110	waittime -= sleeptime;	2357	waittime -= sleeptime;
		2358	}
2111	}	2359	}
2112	}	2360	}
2113		2361
		2362	#if EV_MINIMAL < 2
2114	++loop_count;	2363	++loop_count;
		2364	#endif
		2365	assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2115	backend_poll (EV_A_ waittime);	2366	backend_poll (EV_A_ waittime);
		2367	assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2116		2368
2117	/* update ev_rt_now, do magic */	2369	/* update ev_rt_now, do magic */
2118	time_update (EV_A_ waittime + sleeptime);	2370	time_update (EV_A_ waittime + sleeptime);
2119	}	2371	}
2120		2372
…		…
2131		2383
2132	/* queue check watchers, to be executed first */	2384	/* queue check watchers, to be executed first */
2133	if (expect_false (checkcnt))	2385	if (expect_false (checkcnt))
2134	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2386	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2135		2387
2136	call_pending (EV_A);	2388	EV_INVOKE_PENDING;
2137	}	2389	}
2138	while (expect_true (	2390	while (expect_true (
2139	activecnt	2391	activecnt
2140	&& !loop_done	2392	&& !loop_done
2141	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))	2393	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
2142	));	2394	));
2143		2395
2144	if (loop_done == EVUNLOOP_ONE)	2396	if (loop_done == EVUNLOOP_ONE)
2145	loop_done = EVUNLOOP_CANCEL;	2397	loop_done = EVUNLOOP_CANCEL;
		2398
		2399	#if EV_MINIMAL < 2
		2400	--loop_depth;
		2401	#endif
2146	}	2402	}
2147		2403
2148	void	2404	void
2149	ev_unloop (EV_P_ int how)	2405	ev_unloop (EV_P_ int how)
2150	{	2406	{
…		…
2201	inline_size void	2457	inline_size void
2202	wlist_del (WL *head, WL elem)	2458	wlist_del (WL *head, WL elem)
2203	{	2459	{
2204	while (*head)	2460	while (*head)
2205	{	2461	{
2206	if (*head == elem)	2462	if (expect_true (*head == elem))
2207	{	2463	{
2208	*head = elem->next;	2464	*head = elem->next;
2209	return;	2465	break;
2210	}	2466	}
2211		2467
2212	head = &(*head)->next;	2468	head = &(*head)->next;
2213	}	2469	}
2214	}	2470	}
…		…
2242	}	2498	}
2243		2499
2244	inline_size void	2500	inline_size void
2245	pri_adjust (EV_P_ W w)	2501	pri_adjust (EV_P_ W w)
2246	{	2502	{
2247	int pri = w->priority;	2503	int pri = ev_priority (w);
2248	pri = pri < EV_MINPRI ? EV_MINPRI : pri;	2504	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2249	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;	2505	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2250	w->priority = pri;	2506	ev_set_priority (w, pri);
2251	}	2507	}
2252		2508
2253	inline_speed void	2509	inline_speed void
2254	ev_start (EV_P_ W w, int active)	2510	ev_start (EV_P_ W w, int active)
2255	{	2511	{
…		…
2274		2530
2275	if (expect_false (ev_is_active (w)))	2531	if (expect_false (ev_is_active (w)))
2276	return;	2532	return;
2277		2533
2278	assert (("libev: ev_io_start called with negative fd", fd >= 0));	2534	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2279	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET \| EV_READ \| EV_WRITE))));	2535	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET \| EV_READ \| EV_WRITE))));
2280		2536
2281	EV_FREQUENT_CHECK;	2537	EV_FREQUENT_CHECK;
2282		2538
2283	ev_start (EV_A_ (W)w, 1);	2539	ev_start (EV_A_ (W)w, 1);
2284	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2540	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2285	wlist_add (&anfds[fd].head, (WL)w);	2541	wlist_add (&anfds[fd].head, (WL)w);
2286		2542
2287	fd_change (EV_A_ fd, w->events & EV__IOFDSET \| 1);	2543	fd_change (EV_A_ fd, w->events & EV__IOFDSET \| EV_ANFD_REIFY);
2288	w->events &= ~EV__IOFDSET;	2544	w->events &= ~EV__IOFDSET;
2289		2545
2290	EV_FREQUENT_CHECK;	2546	EV_FREQUENT_CHECK;
2291	}	2547	}
2292		2548
…		…
2354	timers [active] = timers [timercnt + HEAP0];	2610	timers [active] = timers [timercnt + HEAP0];
2355	adjustheap (timers, timercnt, active);	2611	adjustheap (timers, timercnt, active);
2356	}	2612	}
2357	}	2613	}
2358		2614
2359	EV_FREQUENT_CHECK;
2360
2361	ev_at (w) -= mn_now;	2615	ev_at (w) -= mn_now;
2362		2616
2363	ev_stop (EV_A_ (W)w);	2617	ev_stop (EV_A_ (W)w);
		2618
		2619	EV_FREQUENT_CHECK;
2364	}	2620	}
2365		2621
2366	void noinline	2622	void noinline
2367	ev_timer_again (EV_P_ ev_timer *w)	2623	ev_timer_again (EV_P_ ev_timer *w)
2368	{	2624	{
…		…
2386	}	2642	}
2387		2643
2388	EV_FREQUENT_CHECK;	2644	EV_FREQUENT_CHECK;
2389	}	2645	}
2390		2646
		2647	ev_tstamp
		2648	ev_timer_remaining (EV_P_ ev_timer *w)
		2649	{
		2650	return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
		2651	}
		2652
2391	#if EV_PERIODIC_ENABLE	2653	#if EV_PERIODIC_ENABLE
2392	void noinline	2654	void noinline
2393	ev_periodic_start (EV_P_ ev_periodic *w)	2655	ev_periodic_start (EV_P_ ev_periodic *w)
2394	{	2656	{
2395	if (expect_false (ev_is_active (w)))	2657	if (expect_false (ev_is_active (w)))
…		…
2441	periodics [active] = periodics [periodiccnt + HEAP0];	2703	periodics [active] = periodics [periodiccnt + HEAP0];
2442	adjustheap (periodics, periodiccnt, active);	2704	adjustheap (periodics, periodiccnt, active);
2443	}	2705	}
2444	}	2706	}
2445		2707
2446	EV_FREQUENT_CHECK;
2447
2448	ev_stop (EV_A_ (W)w);	2708	ev_stop (EV_A_ (W)w);
		2709
		2710	EV_FREQUENT_CHECK;
2449	}	2711	}
2450		2712
2451	void noinline	2713	void noinline
2452	ev_periodic_again (EV_P_ ev_periodic *w)	2714	ev_periodic_again (EV_P_ ev_periodic *w)
2453	{	2715	{
…		…
2462	#endif	2724	#endif
2463		2725
2464	void noinline	2726	void noinline
2465	ev_signal_start (EV_P_ ev_signal *w)	2727	ev_signal_start (EV_P_ ev_signal *w)
2466	{	2728	{
2467	#if EV_MULTIPLICITY
2468	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2469	#endif
2470	if (expect_false (ev_is_active (w)))	2729	if (expect_false (ev_is_active (w)))
2471	return;	2730	return;
2472		2731
2473	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));	2732	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2474		2733
2475	evpipe_init (EV_A);	2734	#if EV_MULTIPLICITY
		2735	assert (("libev: a signal must not be attached to two different loops",
		2736	!signals [w->signum - 1].loop \|\| signals [w->signum - 1].loop == loop));
2476		2737
2477	EV_FREQUENT_CHECK;	2738	signals [w->signum - 1].loop = EV_A;
		2739	#endif
2478		2740
		2741	EV_FREQUENT_CHECK;
		2742
		2743	#if EV_USE_SIGNALFD
		2744	if (sigfd == -2)
2479	{	2745	{
2480	#ifndef _WIN32	2746	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK \| SFD_CLOEXEC);
2481	sigset_t full, prev;	2747	if (sigfd < 0 && errno == EINVAL)
2482	sigfillset (&full);	2748	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2483	sigprocmask (SIG_SETMASK, &full, &prev);
2484	#endif
2485		2749
2486	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);	2750	if (sigfd >= 0)
		2751	{
		2752	fd_intern (sigfd); /* doing it twice will not hurt */
2487		2753
2488	#ifndef _WIN32	2754	sigemptyset (&sigfd_set);
2489	sigprocmask (SIG_SETMASK, &prev, 0);	2755
2490	#endif	2756	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2757	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2758	ev_io_start (EV_A_ &sigfd_w);
		2759	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2760	}
2491	}	2761	}
		2762
		2763	if (sigfd >= 0)
		2764	{
		2765	/* TODO: check .head */
		2766	sigaddset (&sigfd_set, w->signum);
		2767	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2768
		2769	signalfd (sigfd, &sigfd_set, 0);
		2770	}
		2771	#endif
2492		2772
2493	ev_start (EV_A_ (W)w, 1);	2773	ev_start (EV_A_ (W)w, 1);
2494	wlist_add (&signals [w->signum - 1].head, (WL)w);	2774	wlist_add (&signals [w->signum - 1].head, (WL)w);
2495		2775
2496	if (!((WL)w)->next)	2776	if (!((WL)w)->next)
		2777	# if EV_USE_SIGNALFD
		2778	if (sigfd < 0) /TODO/
		2779	# endif
2497	{	2780	{
2498	#if _WIN32	2781	# ifdef _WIN32
		2782	evpipe_init (EV_A);
		2783
2499	signal (w->signum, ev_sighandler);	2784	signal (w->signum, ev_sighandler);
2500	#else	2785	# else
2501	struct sigaction sa;	2786	struct sigaction sa;
		2787
		2788	evpipe_init (EV_A);
		2789
2502	sa.sa_handler = ev_sighandler;	2790	sa.sa_handler = ev_sighandler;
2503	sigfillset (&sa.sa_mask);	2791	sigfillset (&sa.sa_mask);
2504	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2792	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2505	sigaction (w->signum, &sa, 0);	2793	sigaction (w->signum, &sa, 0);
		2794
		2795	sigemptyset (&sa.sa_mask);
		2796	sigaddset (&sa.sa_mask, w->signum);
		2797	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2506	#endif	2798	#endif
2507	}	2799	}
2508		2800
2509	EV_FREQUENT_CHECK;	2801	EV_FREQUENT_CHECK;
2510	}	2802	}
2511		2803
2512	void noinline	2804	void noinline
…		…
2520		2812
2521	wlist_del (&signals [w->signum - 1].head, (WL)w);	2813	wlist_del (&signals [w->signum - 1].head, (WL)w);
2522	ev_stop (EV_A_ (W)w);	2814	ev_stop (EV_A_ (W)w);
2523		2815
2524	if (!signals [w->signum - 1].head)	2816	if (!signals [w->signum - 1].head)
		2817	{
		2818	#if EV_MULTIPLICITY
		2819	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2820	#endif
		2821	#if EV_USE_SIGNALFD
		2822	if (sigfd >= 0)
		2823	{
		2824	sigset_t ss;
		2825
		2826	sigemptyset (&ss);
		2827	sigaddset (&ss, w->signum);
		2828	sigdelset (&sigfd_set, w->signum);
		2829
		2830	signalfd (sigfd, &sigfd_set, 0);
		2831	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2832	}
		2833	else
		2834	#endif
2525	signal (w->signum, SIG_DFL);	2835	signal (w->signum, SIG_DFL);
		2836	}
2526		2837
2527	EV_FREQUENT_CHECK;	2838	EV_FREQUENT_CHECK;
2528	}	2839	}
2529		2840
2530	void	2841	void
…		…
2571	#define MIN_STAT_INTERVAL 0.1074891	2882	#define MIN_STAT_INTERVAL 0.1074891
2572		2883
2573	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2884	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2574		2885
2575	#if EV_USE_INOTIFY	2886	#if EV_USE_INOTIFY
2576	# define EV_INOTIFY_BUFSIZE 8192	2887
		2888	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2889	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2577		2890
2578	static void noinline	2891	static void noinline
2579	infy_add (EV_P_ ev_stat *w)	2892	infy_add (EV_P_ ev_stat *w)
2580	{	2893	{
2581	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB \| IN_DELETE_SELF \| IN_MOVE_SELF \| IN_MODIFY \| IN_DONT_FOLLOW \| IN_MASK_ADD);	2894	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB \| IN_DELETE_SELF \| IN_MOVE_SELF \| IN_MODIFY \| IN_DONT_FOLLOW \| IN_MASK_ADD);
2582		2895
2583	if (w->wd < 0)	2896	if (w->wd >= 0)
		2897	{
		2898	struct statfs sfs;
		2899
		2900	/* now local changes will be tracked by inotify, but remote changes won't */
		2901	/* unless the filesystem is known to be local, we therefore still poll */
		2902	/* also do poll on <2.6.25, but with normal frequency */
		2903
		2904	if (!fs_2625)
		2905	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2906	else if (!statfs (w->path, &sfs)
		2907	&& (sfs.f_type == 0x1373 /* devfs */
		2908	\|\| sfs.f_type == 0xEF53 /* ext2/3 */
		2909	\|\| sfs.f_type == 0x3153464a /* jfs */
		2910	\|\| sfs.f_type == 0x52654973 /* reiser3 */
		2911	\|\| sfs.f_type == 0x01021994 /* tempfs */
		2912	\|\| sfs.f_type == 0x58465342 /* xfs */))
		2913	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		2914	else
		2915	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2584	{	2916	}
		2917	else
		2918	{
		2919	/* can't use inotify, continue to stat */
2585	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;	2920	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2586	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2587		2921
2588	/* monitor some parent directory for speedup hints */	2922	/* if path is not there, monitor some parent directory for speedup hints */
2589	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2923	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2590	/* but an efficiency issue only */	2924	/* but an efficiency issue only */
2591	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2925	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
2592	{	2926	{
2593	char path [4096];	2927	char path [4096];
…		…
2609	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	2943	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
2610	}	2944	}
2611	}	2945	}
2612		2946
2613	if (w->wd >= 0)	2947	if (w->wd >= 0)
2614	{
2615	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2948	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2616		2949
2617	/* now local changes will be tracked by inotify, but remote changes won't */	2950	/* now re-arm timer, if required */
2618	/* unless the filesystem it known to be local, we therefore still poll */	2951	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2619	/* also do poll on <2.6.25, but with normal frequency */
2620	struct statfs sfs;
2621
2622	if (fs_2625 && !statfs (w->path, &sfs))
2623	if (sfs.f_type == 0x1373 /* devfs */
2624	\|\| sfs.f_type == 0xEF53 /* ext2/3 */
2625	\|\| sfs.f_type == 0x3153464a /* jfs */
2626	\|\| sfs.f_type == 0x52654973 /* reiser3 */
2627	\|\| sfs.f_type == 0x01021994 /* tempfs */
2628	\|\| sfs.f_type == 0x58465342 /* xfs */)
2629	return;
2630
2631	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2632	ev_timer_again (EV_A_ &w->timer);	2952	ev_timer_again (EV_A_ &w->timer);
2633	}	2953	if (ev_is_active (&w->timer)) ev_unref (EV_A);
2634	}	2954	}
2635		2955
2636	static void noinline	2956	static void noinline
2637	infy_del (EV_P_ ev_stat *w)	2957	infy_del (EV_P_ ev_stat *w)
2638	{	2958	{
…		…
2683		3003
2684	static void	3004	static void
2685	infy_cb (EV_P_ ev_io *w, int revents)	3005	infy_cb (EV_P_ ev_io *w, int revents)
2686	{	3006	{
2687	char buf [EV_INOTIFY_BUFSIZE];	3007	char buf [EV_INOTIFY_BUFSIZE];
2688	struct inotify_event ev = (struct inotify_event )buf;
2689	int ofs;	3008	int ofs;
2690	int len = read (fs_fd, buf, sizeof (buf));	3009	int len = read (fs_fd, buf, sizeof (buf));
2691		3010
2692	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	3011	for (ofs = 0; ofs < len; )
		3012	{
		3013	struct inotify_event ev = (struct inotify_event )(buf + ofs);
2693	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3014	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3015	ofs += sizeof (struct inotify_event) + ev->len;
		3016	}
		3017	}
		3018
		3019	inline_size unsigned int
		3020	ev_linux_version (void)
		3021	{
		3022	struct utsname buf;
		3023	unsigned int v;
		3024	int i;
		3025	char *p = buf.release;
		3026
		3027	if (uname (&buf))
		3028	return 0;
		3029
		3030	for (i = 3+1; --i; )
		3031	{
		3032	unsigned int c = 0;
		3033
		3034	for (;;)
		3035	{
		3036	if (p >= '0' && p <= '9')
		3037	c = c * 10 + *p++ - '0';
		3038	else
		3039	{
		3040	p += *p == '.';
		3041	break;
		3042	}
		3043	}
		3044
		3045	v = (v << 8) \| c;
		3046	}
		3047
		3048	return v;
2694	}	3049	}
2695		3050
2696	inline_size void	3051	inline_size void
2697	check_2625 (EV_P)	3052	ev_check_2625 (EV_P)
2698	{	3053	{
2699	/* kernels < 2.6.25 are borked	3054	/* kernels < 2.6.25 are borked
2700	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3055	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2701	*/	3056	*/
2702	struct utsname buf;	3057	if (ev_linux_version () < 0x020619)
2703	int major, minor, micro;
2704
2705	if (uname (&buf))
2706	return;	3058	return;
2707		3059
2708	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2709	return;
2710
2711	if (major < 2
2712	\|\| (major == 2 && minor < 6)
2713	\|\| (major == 2 && minor == 6 && micro < 25))
2714	return;
2715
2716	fs_2625 = 1;	3060	fs_2625 = 1;
		3061	}
		3062
		3063	inline_size int
		3064	infy_newfd (void)
		3065	{
		3066	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3067	int fd = inotify_init1 (IN_CLOEXEC \| IN_NONBLOCK);
		3068	if (fd >= 0)
		3069	return fd;
		3070	#endif
		3071	return inotify_init ();
2717	}	3072	}
2718		3073
2719	inline_size void	3074	inline_size void
2720	infy_init (EV_P)	3075	infy_init (EV_P)
2721	{	3076	{
2722	if (fs_fd != -2)	3077	if (fs_fd != -2)
2723	return;	3078	return;
2724		3079
2725	fs_fd = -1;	3080	fs_fd = -1;
2726		3081
2727	check_2625 (EV_A);	3082	ev_check_2625 (EV_A);
2728		3083
2729	fs_fd = inotify_init ();	3084	fs_fd = infy_newfd ();
2730		3085
2731	if (fs_fd >= 0)	3086	if (fs_fd >= 0)
2732	{	3087	{
		3088	fd_intern (fs_fd);
2733	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3089	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2734	ev_set_priority (&fs_w, EV_MAXPRI);	3090	ev_set_priority (&fs_w, EV_MAXPRI);
2735	ev_io_start (EV_A_ &fs_w);	3091	ev_io_start (EV_A_ &fs_w);
		3092	ev_unref (EV_A);
2736	}	3093	}
2737	}	3094	}
2738		3095
2739	inline_size void	3096	inline_size void
2740	infy_fork (EV_P)	3097	infy_fork (EV_P)
…		…
2742	int slot;	3099	int slot;
2743		3100
2744	if (fs_fd < 0)	3101	if (fs_fd < 0)
2745	return;	3102	return;
2746		3103
		3104	ev_ref (EV_A);
		3105	ev_io_stop (EV_A_ &fs_w);
2747	close (fs_fd);	3106	close (fs_fd);
2748	fs_fd = inotify_init ();	3107	fs_fd = infy_newfd ();
		3108
		3109	if (fs_fd >= 0)
		3110	{
		3111	fd_intern (fs_fd);
		3112	ev_io_set (&fs_w, fs_fd, EV_READ);
		3113	ev_io_start (EV_A_ &fs_w);
		3114	ev_unref (EV_A);
		3115	}
2749		3116
2750	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3117	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2751	{	3118	{
2752	WL w_ = fs_hash [slot].head;	3119	WL w_ = fs_hash [slot].head;
2753	fs_hash [slot].head = 0;	3120	fs_hash [slot].head = 0;
…		…
2760	w->wd = -1;	3127	w->wd = -1;
2761		3128
2762	if (fs_fd >= 0)	3129	if (fs_fd >= 0)
2763	infy_add (EV_A_ w); /* re-add, no matter what */	3130	infy_add (EV_A_ w); /* re-add, no matter what */
2764	else	3131	else
		3132	{
		3133	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3134	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2765	ev_timer_again (EV_A_ &w->timer);	3135	ev_timer_again (EV_A_ &w->timer);
		3136	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3137	}
2766	}	3138	}
2767	}	3139	}
2768	}	3140	}
2769		3141
2770	#endif	3142	#endif
…		…
2787	static void noinline	3159	static void noinline
2788	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3160	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2789	{	3161	{
2790	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));	3162	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
2791		3163
2792	/* we copy this here each the time so that */	3164	ev_statdata prev = w->attr;
2793	/* prev has the old value when the callback gets invoked */
2794	w->prev = w->attr;
2795	ev_stat_stat (EV_A_ w);	3165	ev_stat_stat (EV_A_ w);
2796		3166
2797	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3167	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2798	if (	3168	if (
2799	w->prev.st_dev != w->attr.st_dev	3169	prev.st_dev != w->attr.st_dev
2800	\|\| w->prev.st_ino != w->attr.st_ino	3170	\|\| prev.st_ino != w->attr.st_ino
2801	\|\| w->prev.st_mode != w->attr.st_mode	3171	\|\| prev.st_mode != w->attr.st_mode
2802	\|\| w->prev.st_nlink != w->attr.st_nlink	3172	\|\| prev.st_nlink != w->attr.st_nlink
2803	\|\| w->prev.st_uid != w->attr.st_uid	3173	\|\| prev.st_uid != w->attr.st_uid
2804	\|\| w->prev.st_gid != w->attr.st_gid	3174	\|\| prev.st_gid != w->attr.st_gid
2805	\|\| w->prev.st_rdev != w->attr.st_rdev	3175	\|\| prev.st_rdev != w->attr.st_rdev
2806	\|\| w->prev.st_size != w->attr.st_size	3176	\|\| prev.st_size != w->attr.st_size
2807	\|\| w->prev.st_atime != w->attr.st_atime	3177	\|\| prev.st_atime != w->attr.st_atime
2808	\|\| w->prev.st_mtime != w->attr.st_mtime	3178	\|\| prev.st_mtime != w->attr.st_mtime
2809	\|\| w->prev.st_ctime != w->attr.st_ctime	3179	\|\| prev.st_ctime != w->attr.st_ctime
2810	) {	3180	) {
		3181	/* we only update w->prev on actual differences */
		3182	/* in case we test more often than invoke the callback, */
		3183	/* to ensure that prev is always different to attr */
		3184	w->prev = prev;
		3185
2811	#if EV_USE_INOTIFY	3186	#if EV_USE_INOTIFY
2812	if (fs_fd >= 0)	3187	if (fs_fd >= 0)
2813	{	3188	{
2814	infy_del (EV_A_ w);	3189	infy_del (EV_A_ w);
2815	infy_add (EV_A_ w);	3190	infy_add (EV_A_ w);
…		…
2840		3215
2841	if (fs_fd >= 0)	3216	if (fs_fd >= 0)
2842	infy_add (EV_A_ w);	3217	infy_add (EV_A_ w);
2843	else	3218	else
2844	#endif	3219	#endif
		3220	{
2845	ev_timer_again (EV_A_ &w->timer);	3221	ev_timer_again (EV_A_ &w->timer);
		3222	ev_unref (EV_A);
		3223	}
2846		3224
2847	ev_start (EV_A_ (W)w, 1);	3225	ev_start (EV_A_ (W)w, 1);
2848		3226
2849	EV_FREQUENT_CHECK;	3227	EV_FREQUENT_CHECK;
2850	}	3228	}
…		…
2859	EV_FREQUENT_CHECK;	3237	EV_FREQUENT_CHECK;
2860		3238
2861	#if EV_USE_INOTIFY	3239	#if EV_USE_INOTIFY
2862	infy_del (EV_A_ w);	3240	infy_del (EV_A_ w);
2863	#endif	3241	#endif
		3242
		3243	if (ev_is_active (&w->timer))
		3244	{
		3245	ev_ref (EV_A);
2864	ev_timer_stop (EV_A_ &w->timer);	3246	ev_timer_stop (EV_A_ &w->timer);
		3247	}
2865		3248
2866	ev_stop (EV_A_ (W)w);	3249	ev_stop (EV_A_ (W)w);
2867		3250
2868	EV_FREQUENT_CHECK;	3251	EV_FREQUENT_CHECK;
2869	}	3252	}
…		…
3010	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3393	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3011	{	3394	{
3012	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));	3395	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
3013		3396
3014	{	3397	{
3015	struct ev_loop *loop = w->other;	3398	EV_P = w->other;
3016		3399
3017	while (fdchangecnt)	3400	while (fdchangecnt)
3018	{	3401	{
3019	fd_reify (EV_A);	3402	fd_reify (EV_A);
3020	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3403	ev_loop (EV_A_ EVLOOP_NONBLOCK);
…		…
3028	ev_embed w = (ev_embed )(((char *)fork_w) - offsetof (ev_embed, fork));	3411	ev_embed w = (ev_embed )(((char *)fork_w) - offsetof (ev_embed, fork));
3029		3412
3030	ev_embed_stop (EV_A_ w);	3413	ev_embed_stop (EV_A_ w);
3031		3414
3032	{	3415	{
3033	struct ev_loop *loop = w->other;	3416	EV_P = w->other;
3034		3417
3035	ev_loop_fork (EV_A);	3418	ev_loop_fork (EV_A);
3036	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3419	ev_loop (EV_A_ EVLOOP_NONBLOCK);
3037	}	3420	}
3038		3421
…		…
3052	{	3435	{
3053	if (expect_false (ev_is_active (w)))	3436	if (expect_false (ev_is_active (w)))
3054	return;	3437	return;
3055		3438
3056	{	3439	{
3057	struct ev_loop *loop = w->other;	3440	EV_P = w->other;
3058	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3441	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3059	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3442	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3060	}	3443	}
3061		3444
3062	EV_FREQUENT_CHECK;	3445	EV_FREQUENT_CHECK;
…		…
3089		3472
3090	ev_io_stop (EV_A_ &w->io);	3473	ev_io_stop (EV_A_ &w->io);
3091	ev_prepare_stop (EV_A_ &w->prepare);	3474	ev_prepare_stop (EV_A_ &w->prepare);
3092	ev_fork_stop (EV_A_ &w->fork);	3475	ev_fork_stop (EV_A_ &w->fork);
3093		3476
		3477	ev_stop (EV_A_ (W)w);
		3478
3094	EV_FREQUENT_CHECK;	3479	EV_FREQUENT_CHECK;
3095	}	3480	}
3096	#endif	3481	#endif
3097		3482
3098	#if EV_FORK_ENABLE	3483	#if EV_FORK_ENABLE
…		…
3174		3559
3175	void	3560	void
3176	ev_async_send (EV_P_ ev_async *w)	3561	ev_async_send (EV_P_ ev_async *w)
3177	{	3562	{
3178	w->sent = 1;	3563	w->sent = 1;
3179	evpipe_write (EV_A_ &gotasync);	3564	evpipe_write (EV_A_ &async_pending);
3180	}	3565	}
3181	#endif	3566	#endif
3182		3567
3183	/*****************************************************************************/	3568	/*****************************************************************************/
3184		3569
…		…
3333	if (types & EV_CHECK)	3718	if (types & EV_CHECK)
3334	for (i = checkcnt; i--; )	3719	for (i = checkcnt; i--; )
3335	cb (EV_A_ EV_CHECK, checks [i]);	3720	cb (EV_A_ EV_CHECK, checks [i]);
3336		3721
3337	if (types & EV_SIGNAL)	3722	if (types & EV_SIGNAL)
3338	for (i = 0; i < signalmax; ++i)	3723	for (i = 0; i < EV_NSIG - 1; ++i)
3339	for (wl = signals [i].head; wl; )	3724	for (wl = signals [i].head; wl; )
3340	{	3725	{
3341	wn = wl->next;	3726	wn = wl->next;
3342	cb (EV_A_ EV_SIGNAL, wl);	3727	cb (EV_A_ EV_SIGNAL, wl);
3343	wl = wn;	3728	wl = wn;

Diff Legend

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

Comparing libev/ev.c (file contents): Revision 1.292 by root, Mon Jun 29 07:22:56 2009 UTC vs. Revision 1.331 by root, Tue Mar 9 08:55:03 2010 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.292 by root, Mon Jun 29 07:22:56 2009 UTC vs.
Revision 1.331 by root, Tue Mar 9 08:55:03 2010 UTC