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

Comparing libev/ev.c (file contents):
Revision 1.306 by root, Sun Jul 19 06:35:25 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
…		…
153		153
154	#endif	154	#endif
155		155
156	#include <math.h>	156	#include <math.h>
157	#include <stdlib.h>	157	#include <stdlib.h>
		158	#include <string.h>
158	#include <fcntl.h>	159	#include <fcntl.h>
159	#include <stddef.h>	160	#include <stddef.h>
160		161
161	#include <stdio.h>	162	#include <stdio.h>
162		163
163	#include <assert.h>	164	#include <assert.h>
164	#include <errno.h>	165	#include <errno.h>
165	#include <sys/types.h>	166	#include <sys/types.h>
166	#include <time.h>	167	#include <time.h>
		168	#include <limits.h>
167		169
168	#include <signal.h>	170	#include <signal.h>
169		171
170	#ifdef EV_H	172	#ifdef EV_H
171	# include EV_H	173	# include EV_H
…		…
182	# define WIN32_LEAN_AND_MEAN	184	# define WIN32_LEAN_AND_MEAN
183	# include <windows.h>	185	# include <windows.h>
184	# ifndef EV_SELECT_IS_WINSOCKET	186	# ifndef EV_SELECT_IS_WINSOCKET
185	# define EV_SELECT_IS_WINSOCKET 1	187	# define EV_SELECT_IS_WINSOCKET 1
186	# endif	188	# endif
		189	# undef EV_AVOID_STDIO
187	#endif	190	#endif
188		191
189	/* 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 */
190		193
191	/* try to deduce the maximum number of signals on this platform */	194	/* try to deduce the maximum number of signals on this platform */
192	/* one some platforms, NSIG is one too large. we do not bother */
193	#if defined (EV_NSIG)	195	#if defined (EV_NSIG)
194	/* use what's provided */	196	/* use what's provided */
195	#elif defined (NSIG)	197	#elif defined (NSIG)
196	# define EV_NSIG (NSIG)	198	# define EV_NSIG (NSIG)
197	#elif defined(_NSIG)	199	#elif defined(_NSIG)
…		…
205	#elif defined (MAXSIG)	207	#elif defined (MAXSIG)
206	# define EV_NSIG (MAXSIG+1)	208	# define EV_NSIG (MAXSIG+1)
207	#elif defined (MAX_SIG)	209	#elif defined (MAX_SIG)
208	# define EV_NSIG (MAX_SIG+1)	210	# define EV_NSIG (MAX_SIG+1)
209	#elif defined (SIGARRAYSIZE)	211	#elif defined (SIGARRAYSIZE)
210	# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */	212	# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
211	#elif defined (_sys_nsig)	213	#elif defined (_sys_nsig)
212	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */	214	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
213	#else	215	#else
214	# error "unable to find value for NSIG, please report"	216	# error "unable to find value for NSIG, please report"
215	/* to make it compile regardless, just remove the above line */	217	/* to make it compile regardless, just remove the above line, */
		218	/* but consider reporting it, too! :) */
216	# define EV_NSIG 65	219	# define EV_NSIG 65
217	#endif	220	#endif
218		221
219	#ifndef EV_USE_CLOCK_SYSCALL	222	#ifndef EV_USE_CLOCK_SYSCALL
220	# if __linux && __GLIBC__ >= 2	223	# if __linux && __GLIBC__ >= 2
…		…
303	# define EV_USE_EVENTFD 0	306	# define EV_USE_EVENTFD 0
304	# endif	307	# endif
305	#endif	308	#endif
306		309
307	#ifndef EV_USE_SIGNALFD	310	#ifndef EV_USE_SIGNALFD
308	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9))	311	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
309	# define EV_USE_SIGNALFD 1	312	# define EV_USE_SIGNALFD 1
310	# else	313	# else
311	# define EV_USE_SIGNALFD 0	314	# define EV_USE_SIGNALFD 0
312	# endif	315	# endif
313	#endif	316	#endif
…		…
344	# endif	347	# endif
345	#endif	348	#endif
346		349
347	/* 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 */
348		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
349	#ifndef CLOCK_MONOTONIC	358	#ifndef CLOCK_MONOTONIC
350	# undef EV_USE_MONOTONIC	359	# undef EV_USE_MONOTONIC
351	# define EV_USE_MONOTONIC 0	360	# define EV_USE_MONOTONIC 0
352	#endif	361	#endif
353		362
…		…
387	# include <stdint.h>	396	# include <stdint.h>
388	# ifndef EFD_NONBLOCK	397	# ifndef EFD_NONBLOCK
389	# define EFD_NONBLOCK O_NONBLOCK	398	# define EFD_NONBLOCK O_NONBLOCK
390	# endif	399	# endif
391	# ifndef EFD_CLOEXEC	400	# ifndef EFD_CLOEXEC
		401	# ifdef O_CLOEXEC
392	# define EFD_CLOEXEC O_CLOEXEC	402	# define EFD_CLOEXEC O_CLOEXEC
		403	# else
		404	# define EFD_CLOEXEC 02000000
		405	# endif
393	# endif	406	# endif
394	# ifdef __cplusplus	407	# ifdef __cplusplus
395	extern "C" {	408	extern "C" {
396	# endif	409	# endif
397	int eventfd (unsigned int initval, int flags);	410	int (eventfd) (unsigned int initval, int flags);
398	# ifdef __cplusplus	411	# ifdef __cplusplus
399	}	412	}
400	# endif	413	# endif
401	#endif	414	#endif
402		415
403	#if EV_USE_SIGNALFD	416	#if EV_USE_SIGNALFD
404	# include <sys/signalfd.h>	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
405	#endif	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
406		444
407	/**/	445	/**/
408		446
409	#if EV_VERIFY >= 3	447	#if EV_VERIFY >= 3
410	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	448	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
…		…
422	*/	460	*/
423	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	461	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
424		462
425	#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) */
426	#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) */
427	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
428		465
429	#if __GNUC__ >= 4	466	#if __GNUC__ >= 4
430	# define expect(expr,value) __builtin_expect ((expr),(value))	467	# define expect(expr,value) __builtin_expect ((expr),(value))
431	# define noinline __attribute__ ((noinline))	468	# define noinline __attribute__ ((noinline))
432	#else	469	#else
…		…
473		510
474	#if EV_USE_MONOTONIC	511	#if EV_USE_MONOTONIC
475	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? */
476	#endif	513	#endif
477		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
478	#ifdef _WIN32	525	#ifdef _WIN32
479	# include "ev_win32.c"	526	# include "ev_win32.c"
480	#endif	527	#endif
481		528
482	/*****************************************************************************/	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
483		538
484	static void (syserr_cb)(const char msg);	539	static void (syserr_cb)(const char msg);
485		540
486	void	541	void
487	ev_set_syserr_cb (void (cb)(const char msg))	542	ev_set_syserr_cb (void (cb)(const char msg))
…		…
497		552
498	if (syserr_cb)	553	if (syserr_cb)
499	syserr_cb (msg);	554	syserr_cb (msg);
500	else	555	else
501	{	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
502	perror (msg);	565	perror (msg);
		566	#endif
503	abort ();	567	abort ();
504	}	568	}
505	}	569	}
506		570
507	static void *	571	static void *
508	ev_realloc_emul (void *ptr, long size)	572	ev_realloc_emul (void *ptr, long size)
509	{	573	{
		574	#if __GLIBC__
		575	return realloc (ptr, size);
		576	#else
510	/* some systems, notably openbsd and darwin, fail to properly	577	/* some systems, notably openbsd and darwin, fail to properly
511	* 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
512	* the single unix specification, so work around them here.	579	* the single unix specification, so work around them here.
513	*/	580	*/
514		581
515	if (size)	582	if (size)
516	return realloc (ptr, size);	583	return realloc (ptr, size);
517		584
518	free (ptr);	585	free (ptr);
519	return 0;	586	return 0;
		587	#endif
520	}	588	}
521		589
522	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	590	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
523		591
524	void	592	void
…		…
532	{	600	{
533	ptr = alloc (ptr, size);	601	ptr = alloc (ptr, size);
534		602
535	if (!ptr && size)	603	if (!ptr && size)
536	{	604	{
		605	#if EV_AVOID_STDIO
		606	ev_printerr ("libev: memory allocation failed, aborting.\n");
		607	#else
537	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	608	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		609	#endif
538	abort ();	610	abort ();
539	}	611	}
540		612
541	return ptr;	613	return ptr;
542	}	614	}
…		…
819	}	891	}
820		892
821	/*****************************************************************************/	893	/*****************************************************************************/
822		894
823	inline_speed void	895	inline_speed void
824	fd_event_nc (EV_P_ int fd, int revents)	896	fd_event_nocheck (EV_P_ int fd, int revents)
825	{	897	{
826	ANFD *anfd = anfds + fd;	898	ANFD *anfd = anfds + fd;
827	ev_io *w;	899	ev_io *w;
828		900
829	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)
…		…
841	fd_event (EV_P_ int fd, int revents)	913	fd_event (EV_P_ int fd, int revents)
842	{	914	{
843	ANFD *anfd = anfds + fd;	915	ANFD *anfd = anfds + fd;
844		916
845	if (expect_true (!anfd->reify))	917	if (expect_true (!anfd->reify))
846	fd_event_nc (EV_A_ fd, revents);	918	fd_event_nocheck (EV_A_ fd, revents);
847	}	919	}
848		920
849	void	921	void
850	ev_feed_fd_event (EV_P_ int fd, int revents)	922	ev_feed_fd_event (EV_P_ int fd, int revents)
851	{	923	{
852	if (fd >= 0 && fd < anfdmax)	924	if (fd >= 0 && fd < anfdmax)
853	fd_event_nc (EV_A_ fd, revents);	925	fd_event_nocheck (EV_A_ fd, revents);
854	}	926	}
855		927
856	/* make sure the external fd watch events are in-sync */	928	/* make sure the external fd watch events are in-sync */
857	/* with the kernel/libev internal state */	929	/* with the kernel/libev internal state */
858	inline_size void	930	inline_size void
…		…
873		945
874	#if EV_SELECT_IS_WINSOCKET	946	#if EV_SELECT_IS_WINSOCKET
875	if (events)	947	if (events)
876	{	948	{
877	unsigned long arg;	949	unsigned long arg;
878	#ifdef EV_FD_TO_WIN32_HANDLE
879	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	950	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
880	#else
881	anfd->handle = _get_osfhandle (fd);
882	#endif
883	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));
884	}	952	}
885	#endif	953	#endif
886		954
887	{	955	{
…		…
925	ev_io_stop (EV_A_ w);	993	ev_io_stop (EV_A_ w);
926	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);
927	}	995	}
928	}	996	}
929		997
930	/* check whether the given fd is atcually valid, for error recovery */	998	/* check whether the given fd is actually valid, for error recovery */
931	inline_size int	999	inline_size int
932	fd_valid (int fd)	1000	fd_valid (int fd)
933	{	1001	{
934	#ifdef _WIN32	1002	#ifdef _WIN32
935	return _get_osfhandle (fd) != -1;	1003	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
936	#else	1004	#else
937	return fcntl (fd, F_GETFD) != -1;	1005	return fcntl (fd, F_GETFD) != -1;
938	#endif	1006	#endif
939	}	1007	}
940		1008
…		…
958		1026
959	for (fd = anfdmax; fd--; )	1027	for (fd = anfdmax; fd--; )
960	if (anfds [fd].events)	1028	if (anfds [fd].events)
961	{	1029	{
962	fd_kill (EV_A_ fd);	1030	fd_kill (EV_A_ fd);
963	return;	1031	break;
964	}	1032	}
965	}	1033	}
966		1034
967	/* 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 */
968	static void noinline	1036	static void noinline
…		…
975	{	1043	{
976	anfds [fd].events = 0;	1044	anfds [fd].events = 0;
977	anfds [fd].emask = 0;	1045	anfds [fd].emask = 0;
978	fd_change (EV_A_ fd, EV__IOFDSET \| EV_ANFD_REIFY);	1046	fd_change (EV_A_ fd, EV__IOFDSET \| EV_ANFD_REIFY);
979	}	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
980	}	1062	}
981		1063
982	/*****************************************************************************/	1064	/*****************************************************************************/
983		1065
984	/*	1066	/*
…		…
1058		1140
1059	for (;;)	1141	for (;;)
1060	{	1142	{
1061	int c = k << 1;	1143	int c = k << 1;
1062		1144
1063	if (c > N + HEAP0 - 1)	1145	if (c >= N + HEAP0)
1064	break;	1146	break;
1065		1147
1066	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])
1067	? 1 : 0;	1149	? 1 : 0;
1068		1150
…		…
1104		1186
1105	/* move an element suitably so it is in a correct place */	1187	/* move an element suitably so it is in a correct place */
1106	inline_size void	1188	inline_size void
1107	adjustheap (ANHE *heap, int N, int k)	1189	adjustheap (ANHE *heap, int N, int k)
1108	{	1190	{
1109	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)]))
1110	upheap (heap, k);	1192	upheap (heap, k);
1111	else	1193	else
1112	downheap (heap, N, k);	1194	downheap (heap, N, k);
1113	}	1195	}
1114		1196
…		…
1127	/*****************************************************************************/	1209	/*****************************************************************************/
1128		1210
1129	/* associate signal watchers to a signal signal */	1211	/* associate signal watchers to a signal signal */
1130	typedef struct	1212	typedef struct
1131	{	1213	{
		1214	EV_ATOMIC_T pending;
1132	#if EV_MULTIPLICITY	1215	#if EV_MULTIPLICITY
1133	EV_P;	1216	EV_P;
1134	#endif	1217	#endif
1135	WL head;	1218	WL head;
1136	EV_ATOMIC_T gotsig;
1137	} ANSIG;	1219	} ANSIG;
1138		1220
1139	static ANSIG signals [EV_NSIG - 1];	1221	static ANSIG signals [EV_NSIG - 1];
1140	static EV_ATOMIC_T gotsig;
1141		1222
1142	/*****************************************************************************/	1223	/*****************************************************************************/
1143		1224
1144	/* used to prepare libev internal fd's */	1225	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1145	/* this is not fork-safe */
1146	inline_speed void
1147	fd_intern (int fd)
1148	{
1149	#ifdef _WIN32
1150	unsigned long arg = 1;
1151	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1152	#else
1153	fcntl (fd, F_SETFD, FD_CLOEXEC);
1154	fcntl (fd, F_SETFL, O_NONBLOCK);
1155	#endif
1156	}
1157		1226
1158	static void noinline	1227	static void noinline
1159	evpipe_init (EV_P)	1228	evpipe_init (EV_P)
1160	{	1229	{
1161	if (!ev_is_active (&pipe_w))	1230	if (!ev_is_active (&pipe_w))
1162	{	1231	{
1163	#if EV_USE_EVENTFD	1232	# if EV_USE_EVENTFD
1164	evfd = eventfd (0, EFD_NONBLOCK \| EFD_CLOEXEC);	1233	evfd = eventfd (0, EFD_NONBLOCK \| EFD_CLOEXEC);
1165	if (evfd < 0 && errno == EINVAL)	1234	if (evfd < 0 && errno == EINVAL)
1166	evfd = eventfd (0, 0);	1235	evfd = eventfd (0, 0);
1167		1236
1168	if (evfd >= 0)	1237	if (evfd >= 0)
…		…
1170	evpipe [0] = -1;	1239	evpipe [0] = -1;
1171	fd_intern (evfd); /* doing it twice doesn't hurt */	1240	fd_intern (evfd); /* doing it twice doesn't hurt */
1172	ev_io_set (&pipe_w, evfd, EV_READ);	1241	ev_io_set (&pipe_w, evfd, EV_READ);
1173	}	1242	}
1174	else	1243	else
1175	#endif	1244	# endif
1176	{	1245	{
1177	while (pipe (evpipe))	1246	while (pipe (evpipe))
1178	ev_syserr ("(libev) error creating signal/async pipe");	1247	ev_syserr ("(libev) error creating signal/async pipe");
1179		1248
1180	fd_intern (evpipe [0]);	1249	fd_intern (evpipe [0]);
…		…
1191	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1260	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1192	{	1261	{
1193	if (!*flag)	1262	if (!*flag)
1194	{	1263	{
1195	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;
1196		1266
1197	*flag = 1;	1267	*flag = 1;
1198		1268
1199	#if EV_USE_EVENTFD	1269	#if EV_USE_EVENTFD
1200	if (evfd >= 0)	1270	if (evfd >= 0)
…		…
1202	uint64_t counter = 1;	1272	uint64_t counter = 1;
1203	write (evfd, &counter, sizeof (uint64_t));	1273	write (evfd, &counter, sizeof (uint64_t));
1204	}	1274	}
1205	else	1275	else
1206	#endif	1276	#endif
1207	write (evpipe [1], &old_errno, 1);	1277	write (evpipe [1], &dummy, 1);
1208		1278
1209	errno = old_errno;	1279	errno = old_errno;
1210	}	1280	}
1211	}	1281	}
1212		1282
1213	/* called whenever the libev signal pipe */	1283	/* called whenever the libev signal pipe */
1214	/* got some events (signal, async) */	1284	/* got some events (signal, async) */
1215	static void	1285	static void
1216	pipecb (EV_P_ ev_io *iow, int revents)	1286	pipecb (EV_P_ ev_io *iow, int revents)
1217	{	1287	{
		1288	int i;
		1289
1218	#if EV_USE_EVENTFD	1290	#if EV_USE_EVENTFD
1219	if (evfd >= 0)	1291	if (evfd >= 0)
1220	{	1292	{
1221	uint64_t counter;	1293	uint64_t counter;
1222	read (evfd, &counter, sizeof (uint64_t));	1294	read (evfd, &counter, sizeof (uint64_t));
…		…
1226	{	1298	{
1227	char dummy;	1299	char dummy;
1228	read (evpipe [0], &dummy, 1);	1300	read (evpipe [0], &dummy, 1);
1229	}	1301	}
1230		1302
1231	if (gotsig && ev_is_default_loop (EV_A))	1303	if (sig_pending)
1232	{	1304	{
1233	int signum;	1305	sig_pending = 0;
1234	gotsig = 0;
1235		1306
1236	for (signum = EV_NSIG - 1; signum--; )	1307	for (i = EV_NSIG - 1; i--; )
1237	if (signals [signum].gotsig)	1308	if (expect_false (signals [i].pending))
1238	ev_feed_signal_event (EV_A_ signum + 1);	1309	ev_feed_signal_event (EV_A_ i + 1);
1239	}	1310	}
1240		1311
1241	#if EV_ASYNC_ENABLE	1312	#if EV_ASYNC_ENABLE
1242	if (gotasync)	1313	if (async_pending)
1243	{	1314	{
1244	int i;	1315	async_pending = 0;
1245	gotasync = 0;
1246		1316
1247	for (i = asynccnt; i--; )	1317	for (i = asynccnt; i--; )
1248	if (asyncs [i]->sent)	1318	if (asyncs [i]->sent)
1249	{	1319	{
1250	asyncs [i]->sent = 0;	1320	asyncs [i]->sent = 0;
…		…
1261	{	1331	{
1262	#if EV_MULTIPLICITY	1332	#if EV_MULTIPLICITY
1263	EV_P = signals [signum - 1].loop;	1333	EV_P = signals [signum - 1].loop;
1264	#endif	1334	#endif
1265		1335
1266	#if _WIN32	1336	#ifdef _WIN32
1267	signal (signum, ev_sighandler);	1337	signal (signum, ev_sighandler);
1268	#endif	1338	#endif
1269		1339
1270	signals [signum - 1].gotsig = 1;	1340	signals [signum - 1].pending = 1;
1271	evpipe_write (EV_A_ &gotsig);	1341	evpipe_write (EV_A_ &sig_pending);
1272	}	1342	}
1273		1343
1274	void noinline	1344	void noinline
1275	ev_feed_signal_event (EV_P_ int signum)	1345	ev_feed_signal_event (EV_P_ int signum)
1276	{	1346	{
1277	WL w;	1347	WL w;
1278		1348
		1349	if (expect_false (signum <= 0 \|\| signum > EV_NSIG))
		1350	return;
		1351
		1352	--signum;
		1353
1279	#if EV_MULTIPLICITY	1354	#if EV_MULTIPLICITY
1280	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 */
1281	#endif	1356	/* or, likely more useful, feeding a signal nobody is waiting for */
1282		1357
1283	if (signum <= 0 \|\| signum > EV_NSIG)	1358	if (expect_false (signals [signum].loop != EV_A))
1284	return;	1359	return;
		1360	#endif
1285		1361
1286	--signum;
1287
1288	signals [signum].gotsig = 0;	1362	signals [signum].pending = 0;
1289		1363
1290	for (w = signals [signum].head; w; w = w->next)	1364	for (w = signals [signum].head; w; w = w->next)
1291	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1365	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1292	}	1366	}
1293		1367
…		…
1309	break;	1383	break;
1310	}	1384	}
1311	}	1385	}
1312	#endif	1386	#endif
1313		1387
		1388	#endif
		1389
1314	/*****************************************************************************/	1390	/*****************************************************************************/
1315		1391
		1392	#if EV_CHILD_ENABLE
1316	static WL childs [EV_PID_HASHSIZE];	1393	static WL childs [EV_PID_HASHSIZE];
1317
1318	#ifndef _WIN32
1319		1394
1320	static ev_signal childev;	1395	static ev_signal childev;
1321		1396
1322	#ifndef WIFCONTINUED	1397	#ifndef WIFCONTINUED
1323	# define WIFCONTINUED(status) 0	1398	# define WIFCONTINUED(status) 0
…		…
1560		1635
1561	io_blocktime = 0.;	1636	io_blocktime = 0.;
1562	timeout_blocktime = 0.;	1637	timeout_blocktime = 0.;
1563	backend = 0;	1638	backend = 0;
1564	backend_fd = -1;	1639	backend_fd = -1;
1565	gotasync = 0;	1640	sig_pending = 0;
		1641	#if EV_ASYNC_ENABLE
		1642	async_pending = 0;
		1643	#endif
1566	#if EV_USE_INOTIFY	1644	#if EV_USE_INOTIFY
1567	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1645	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1568	#endif	1646	#endif
1569	#if EV_USE_SIGNALFD	1647	#if EV_USE_SIGNALFD
1570	sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2;	1648	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1571	#endif	1649	#endif
1572		1650
1573	if (!(flags & 0x0000ffffU))	1651	if (!(flags & 0x0000ffffU))
1574	flags \|= ev_recommended_backends ();	1652	flags \|= ev_recommended_backends ();
1575		1653
…		…
1589	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1667	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1590	#endif	1668	#endif
1591		1669
1592	ev_prepare_init (&pending_w, pendingcb);	1670	ev_prepare_init (&pending_w, pendingcb);
1593		1671
		1672	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1594	ev_init (&pipe_w, pipecb);	1673	ev_init (&pipe_w, pipecb);
1595	ev_set_priority (&pipe_w, EV_MAXPRI);	1674	ev_set_priority (&pipe_w, EV_MAXPRI);
		1675	#endif
1596	}	1676	}
1597	}	1677	}
1598		1678
1599	/* free up a loop structure */	1679	/* free up a loop structure */
1600	static void noinline	1680	static void noinline
…		…
1612	close (evfd);	1692	close (evfd);
1613	#endif	1693	#endif
1614		1694
1615	if (evpipe [0] >= 0)	1695	if (evpipe [0] >= 0)
1616	{	1696	{
1617	close (evpipe [0]);	1697	EV_WIN32_CLOSE_FD (evpipe [0]);
1618	close (evpipe [1]);	1698	EV_WIN32_CLOSE_FD (evpipe [1]);
1619	}	1699	}
1620	}	1700	}
1621		1701
1622	#if EV_USE_SIGNALFD	1702	#if EV_USE_SIGNALFD
1623	if (ev_is_active (&sigfd_w))	1703	if (ev_is_active (&sigfd_w))
1624	{
1625	/ev_ref (EV_A);/
1626	/ev_io_stop (EV_A_ &sigfd_w);/
1627
1628	close (sigfd);	1704	close (sigfd);
1629	}
1630	#endif	1705	#endif
1631		1706
1632	#if EV_USE_INOTIFY	1707	#if EV_USE_INOTIFY
1633	if (fs_fd >= 0)	1708	if (fs_fd >= 0)
1634	close (fs_fd);	1709	close (fs_fd);
…		…
1704		1779
1705	if (ev_is_active (&pipe_w))	1780	if (ev_is_active (&pipe_w))
1706	{	1781	{
1707	/* this "locks" the handlers against writing to the pipe */	1782	/* this "locks" the handlers against writing to the pipe */
1708	/* while we modify the fd vars */	1783	/* while we modify the fd vars */
1709	gotsig = 1;	1784	sig_pending = 1;
1710	#if EV_ASYNC_ENABLE	1785	#if EV_ASYNC_ENABLE
1711	gotasync = 1;	1786	async_pending = 1;
1712	#endif	1787	#endif
1713		1788
1714	ev_ref (EV_A);	1789	ev_ref (EV_A);
1715	ev_io_stop (EV_A_ &pipe_w);	1790	ev_io_stop (EV_A_ &pipe_w);
1716		1791
…		…
1719	close (evfd);	1794	close (evfd);
1720	#endif	1795	#endif
1721		1796
1722	if (evpipe [0] >= 0)	1797	if (evpipe [0] >= 0)
1723	{	1798	{
1724	close (evpipe [0]);	1799	EV_WIN32_CLOSE_FD (evpipe [0]);
1725	close (evpipe [1]);	1800	EV_WIN32_CLOSE_FD (evpipe [1]);
1726	}	1801	}
1727		1802
		1803	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1728	evpipe_init (EV_A);	1804	evpipe_init (EV_A);
1729	/* now iterate over everything, in case we missed something */	1805	/* now iterate over everything, in case we missed something */
1730	pipecb (EV_A_ &pipe_w, EV_READ);	1806	pipecb (EV_A_ &pipe_w, EV_READ);
		1807	#endif
1731	}	1808	}
1732		1809
1733	postfork = 0;	1810	postfork = 0;
1734	}	1811	}
1735		1812
…		…
1848	#if EV_ASYNC_ENABLE	1925	#if EV_ASYNC_ENABLE
1849	assert (asyncmax >= asynccnt);	1926	assert (asyncmax >= asynccnt);
1850	array_verify (EV_A_ (W *)asyncs, asynccnt);	1927	array_verify (EV_A_ (W *)asyncs, asynccnt);
1851	#endif	1928	#endif
1852		1929
		1930	#if EV_PREPARE_ENABLE
1853	assert (preparemax >= preparecnt);	1931	assert (preparemax >= preparecnt);
1854	array_verify (EV_A_ (W *)prepares, preparecnt);	1932	array_verify (EV_A_ (W *)prepares, preparecnt);
		1933	#endif
1855		1934
		1935	#if EV_CHECK_ENABLE
1856	assert (checkmax >= checkcnt);	1936	assert (checkmax >= checkcnt);
1857	array_verify (EV_A_ (W *)checks, checkcnt);	1937	array_verify (EV_A_ (W *)checks, checkcnt);
		1938	#endif
1858		1939
1859	# if 0	1940	# if 0
		1941	#if EV_CHILD_ENABLE
1860	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)
1861	for (signum = EV_NSIG; signum--; ) if (signals [signum].gotsig)	1943	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
		1944	#endif
1862	# endif	1945	# endif
1863	#endif	1946	#endif
1864	}	1947	}
1865	#endif	1948	#endif
1866		1949
…		…
1882		1965
1883	loop_init (EV_A_ flags);	1966	loop_init (EV_A_ flags);
1884		1967
1885	if (ev_backend (EV_A))	1968	if (ev_backend (EV_A))
1886	{	1969	{
1887	#ifndef _WIN32	1970	#if EV_CHILD_ENABLE
1888	ev_signal_init (&childev, childcb, SIGCHLD);	1971	ev_signal_init (&childev, childcb, SIGCHLD);
1889	ev_set_priority (&childev, EV_MAXPRI);	1972	ev_set_priority (&childev, EV_MAXPRI);
1890	ev_signal_start (EV_A_ &childev);	1973	ev_signal_start (EV_A_ &childev);
1891	ev_unref (EV_A); /* child watcher should not keep loop alive */	1974	ev_unref (EV_A); /* child watcher should not keep loop alive */
1892	#endif	1975	#endif
…		…
1905	EV_P = ev_default_loop_ptr;	1988	EV_P = ev_default_loop_ptr;
1906	#endif	1989	#endif
1907		1990
1908	ev_default_loop_ptr = 0;	1991	ev_default_loop_ptr = 0;
1909		1992
1910	#ifndef _WIN32	1993	#if EV_CHILD_ENABLE
1911	ev_ref (EV_A); /* child watcher */	1994	ev_ref (EV_A); /* child watcher */
1912	ev_signal_stop (EV_A_ &childev);	1995	ev_signal_stop (EV_A_ &childev);
1913	#endif	1996	#endif
1914		1997
1915	loop_destroy (EV_A);	1998	loop_destroy (EV_A);
…		…
2122	ANHE_at_cache (*he);	2205	ANHE_at_cache (*he);
2123	}	2206	}
2124	}	2207	}
2125		2208
2126	/* fetch new monotonic and realtime times from the kernel */	2209	/* fetch new monotonic and realtime times from the kernel */
2127	/* also detetc if there was a timejump, and act accordingly */	2210	/* also detect if there was a timejump, and act accordingly */
2128	inline_speed void	2211	inline_speed void
2129	time_update (EV_P_ ev_tstamp max_block)	2212	time_update (EV_P_ ev_tstamp max_block)
2130	{	2213	{
2131	#if EV_USE_MONOTONIC	2214	#if EV_USE_MONOTONIC
2132	if (expect_true (have_monotonic))	2215	if (expect_true (have_monotonic))
…		…
2227	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	2310	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2228	EV_INVOKE_PENDING;	2311	EV_INVOKE_PENDING;
2229	}	2312	}
2230	#endif	2313	#endif
2231		2314
		2315	#if EV_PREPARE_ENABLE
2232	/* queue prepare watchers (and execute them) */	2316	/* queue prepare watchers (and execute them) */
2233	if (expect_false (preparecnt))	2317	if (expect_false (preparecnt))
2234	{	2318	{
2235	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	2319	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2236	EV_INVOKE_PENDING;	2320	EV_INVOKE_PENDING;
2237	}	2321	}
		2322	#endif
2238		2323
2239	if (expect_false (loop_done))	2324	if (expect_false (loop_done))
2240	break;	2325	break;
2241		2326
2242	/* we might have forked, so reify kernel state if necessary */	2327	/* we might have forked, so reify kernel state if necessary */
…		…
2315	#if EV_IDLE_ENABLE	2400	#if EV_IDLE_ENABLE
2316	/* queue idle watchers unless other events are pending */	2401	/* queue idle watchers unless other events are pending */
2317	idle_reify (EV_A);	2402	idle_reify (EV_A);
2318	#endif	2403	#endif
2319		2404
		2405	#if EV_CHECK_ENABLE
2320	/* queue check watchers, to be executed first */	2406	/* queue check watchers, to be executed first */
2321	if (expect_false (checkcnt))	2407	if (expect_false (checkcnt))
2322	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2408	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		2409	#endif
2323		2410
2324	EV_INVOKE_PENDING;	2411	EV_INVOKE_PENDING;
2325	}	2412	}
2326	while (expect_true (	2413	while (expect_true (
2327	activecnt	2414	activecnt
…		…
2393	inline_size void	2480	inline_size void
2394	wlist_del (WL *head, WL elem)	2481	wlist_del (WL *head, WL elem)
2395	{	2482	{
2396	while (*head)	2483	while (*head)
2397	{	2484	{
2398	if (*head == elem)	2485	if (expect_true (*head == elem))
2399	{	2486	{
2400	*head = elem->next;	2487	*head = elem->next;
2401	return;	2488	break;
2402	}	2489	}
2403		2490
2404	head = &(*head)->next;	2491	head = &(*head)->next;
2405	}	2492	}
2406	}	2493	}
…		…
2466		2553
2467	if (expect_false (ev_is_active (w)))	2554	if (expect_false (ev_is_active (w)))
2468	return;	2555	return;
2469		2556
2470	assert (("libev: ev_io_start called with negative fd", fd >= 0));	2557	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2471	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))));
2472		2559
2473	EV_FREQUENT_CHECK;	2560	EV_FREQUENT_CHECK;
2474		2561
2475	ev_start (EV_A_ (W)w, 1);	2562	ev_start (EV_A_ (W)w, 1);
2476	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2563	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
…		…
2546	timers [active] = timers [timercnt + HEAP0];	2633	timers [active] = timers [timercnt + HEAP0];
2547	adjustheap (timers, timercnt, active);	2634	adjustheap (timers, timercnt, active);
2548	}	2635	}
2549	}	2636	}
2550		2637
2551	EV_FREQUENT_CHECK;
2552
2553	ev_at (w) -= mn_now;	2638	ev_at (w) -= mn_now;
2554		2639
2555	ev_stop (EV_A_ (W)w);	2640	ev_stop (EV_A_ (W)w);
		2641
		2642	EV_FREQUENT_CHECK;
2556	}	2643	}
2557		2644
2558	void noinline	2645	void noinline
2559	ev_timer_again (EV_P_ ev_timer *w)	2646	ev_timer_again (EV_P_ ev_timer *w)
2560	{	2647	{
…		…
2639	periodics [active] = periodics [periodiccnt + HEAP0];	2726	periodics [active] = periodics [periodiccnt + HEAP0];
2640	adjustheap (periodics, periodiccnt, active);	2727	adjustheap (periodics, periodiccnt, active);
2641	}	2728	}
2642	}	2729	}
2643		2730
2644	EV_FREQUENT_CHECK;
2645
2646	ev_stop (EV_A_ (W)w);	2731	ev_stop (EV_A_ (W)w);
		2732
		2733	EV_FREQUENT_CHECK;
2647	}	2734	}
2648		2735
2649	void noinline	2736	void noinline
2650	ev_periodic_again (EV_P_ ev_periodic *w)	2737	ev_periodic_again (EV_P_ ev_periodic *w)
2651	{	2738	{
…		…
2657		2744
2658	#ifndef SA_RESTART	2745	#ifndef SA_RESTART
2659	# define SA_RESTART 0	2746	# define SA_RESTART 0
2660	#endif	2747	#endif
2661		2748
		2749	#if EV_SIGNAL_ENABLE
		2750
2662	void noinline	2751	void noinline
2663	ev_signal_start (EV_P_ ev_signal *w)	2752	ev_signal_start (EV_P_ ev_signal *w)
2664	{	2753	{
2665	if (expect_false (ev_is_active (w)))	2754	if (expect_false (ev_is_active (w)))
2666	return;	2755	return;
2667		2756
2668	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));	2757	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2669		2758
2670	#if EV_MULTIPLICITY	2759	#if EV_MULTIPLICITY
2671	assert (("libev: tried to attach to a signal from two different loops",	2760	assert (("libev: a signal must not be attached to two different loops",
2672	!signals [w->signum - 1].loop \|\| signals [w->signum - 1].loop == loop));	2761	!signals [w->signum - 1].loop \|\| signals [w->signum - 1].loop == loop));
2673		2762
2674	signals [w->signum - 1].loop = EV_A;	2763	signals [w->signum - 1].loop = EV_A;
2675	#endif	2764	#endif
2676		2765
…		…
2712	if (!((WL)w)->next)	2801	if (!((WL)w)->next)
2713	# if EV_USE_SIGNALFD	2802	# if EV_USE_SIGNALFD
2714	if (sigfd < 0) /TODO/	2803	if (sigfd < 0) /TODO/
2715	# endif	2804	# endif
2716	{	2805	{
2717	# if _WIN32	2806	# ifdef _WIN32
		2807	evpipe_init (EV_A);
		2808
2718	signal (w->signum, ev_sighandler);	2809	signal (w->signum, ev_sighandler);
2719	# else	2810	# else
2720	struct sigaction sa;	2811	struct sigaction sa;
2721		2812
2722	evpipe_init (EV_A);	2813	evpipe_init (EV_A);
…		…
2747	wlist_del (&signals [w->signum - 1].head, (WL)w);	2838	wlist_del (&signals [w->signum - 1].head, (WL)w);
2748	ev_stop (EV_A_ (W)w);	2839	ev_stop (EV_A_ (W)w);
2749		2840
2750	if (!signals [w->signum - 1].head)	2841	if (!signals [w->signum - 1].head)
2751	{	2842	{
2752	#if EV_MULTIPLICITY	2843	#if EV_MULTIPLICITY
2753	signals [w->signum - 1].loop = 0; /* unattach from signal */	2844	signals [w->signum - 1].loop = 0; /* unattach from signal */
2754	#endif	2845	#endif
2755	#if EV_USE_SIGNALFD	2846	#if EV_USE_SIGNALFD
2756	if (sigfd >= 0)	2847	if (sigfd >= 0)
2757	{	2848	{
2758	sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D	2849	sigset_t ss;
		2850
		2851	sigemptyset (&ss);
		2852	sigaddset (&ss, w->signum);
2759	sigdelset (&sigfd_set, w->signum);	2853	sigdelset (&sigfd_set, w->signum);
		2854
2760	signalfd (sigfd, &sigfd_set, 0);	2855	signalfd (sigfd, &sigfd_set, 0);
2761	sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D	2856	sigprocmask (SIG_UNBLOCK, &ss, 0);
2762	/TODO: maybe unblock signal? /
2763	}	2857	}
2764	else	2858	else
2765	#endif	2859	#endif
2766	signal (w->signum, SIG_DFL);	2860	signal (w->signum, SIG_DFL);
2767	}	2861	}
2768		2862
2769	EV_FREQUENT_CHECK;	2863	EV_FREQUENT_CHECK;
2770	}	2864	}
		2865
		2866	#endif
		2867
		2868	#if EV_CHILD_ENABLE
2771		2869
2772	void	2870	void
2773	ev_child_start (EV_P_ ev_child *w)	2871	ev_child_start (EV_P_ ev_child *w)
2774	{	2872	{
2775	#if EV_MULTIPLICITY	2873	#if EV_MULTIPLICITY
…		…
2799	ev_stop (EV_A_ (W)w);	2897	ev_stop (EV_A_ (W)w);
2800		2898
2801	EV_FREQUENT_CHECK;	2899	EV_FREQUENT_CHECK;
2802	}	2900	}
2803		2901
		2902	#endif
		2903
2804	#if EV_STAT_ENABLE	2904	#if EV_STAT_ENABLE
2805		2905
2806	# ifdef _WIN32	2906	# ifdef _WIN32
2807	# undef lstat	2907	# undef lstat
2808	# define lstat(a,b) _stati64 (a,b)	2908	# define lstat(a,b) _stati64 (a,b)
…		…
2813	#define MIN_STAT_INTERVAL 0.1074891	2913	#define MIN_STAT_INTERVAL 0.1074891
2814		2914
2815	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);
2816		2916
2817	#if EV_USE_INOTIFY	2917	#if EV_USE_INOTIFY
2818	# 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)
2819		2921
2820	static void noinline	2922	static void noinline
2821	infy_add (EV_P_ ev_stat *w)	2923	infy_add (EV_P_ ev_stat *w)
2822	{	2924	{
2823	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);
2824		2926
2825	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 */
2826	{	2947	}
		2948	else
		2949	{
		2950	/* can't use inotify, continue to stat */
2827	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;	2951	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2828	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2829		2952
2830	/* monitor some parent directory for speedup hints */	2953	/* if path is not there, monitor some parent directory for speedup hints */
2831	/* 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, */
2832	/* but an efficiency issue only */	2955	/* but an efficiency issue only */
2833	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2956	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
2834	{	2957	{
2835	char path [4096];	2958	char path [4096];
…		…
2851	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	2974	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
2852	}	2975	}
2853	}	2976	}
2854		2977
2855	if (w->wd >= 0)	2978	if (w->wd >= 0)
2856	{
2857	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);
2858		2980
2859	/* now local changes will be tracked by inotify, but remote changes won't */	2981	/* now re-arm timer, if required */
2860	/* unless the filesystem it known to be local, we therefore still poll */	2982	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2861	/* also do poll on <2.6.25, but with normal frequency */
2862	struct statfs sfs;
2863
2864	if (fs_2625 && !statfs (w->path, &sfs))
2865	if (sfs.f_type == 0x1373 /* devfs */
2866	\|\| sfs.f_type == 0xEF53 /* ext2/3 */
2867	\|\| sfs.f_type == 0x3153464a /* jfs */
2868	\|\| sfs.f_type == 0x52654973 /* reiser3 */
2869	\|\| sfs.f_type == 0x01021994 /* tempfs */
2870	\|\| sfs.f_type == 0x58465342 /* xfs */)
2871	return;
2872
2873	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2874	ev_timer_again (EV_A_ &w->timer);	2983	ev_timer_again (EV_A_ &w->timer);
2875	}	2984	if (ev_is_active (&w->timer)) ev_unref (EV_A);
2876	}	2985	}
2877		2986
2878	static void noinline	2987	static void noinline
2879	infy_del (EV_P_ ev_stat *w)	2988	infy_del (EV_P_ ev_stat *w)
2880	{	2989	{
…		…
2925		3034
2926	static void	3035	static void
2927	infy_cb (EV_P_ ev_io *w, int revents)	3036	infy_cb (EV_P_ ev_io *w, int revents)
2928	{	3037	{
2929	char buf [EV_INOTIFY_BUFSIZE];	3038	char buf [EV_INOTIFY_BUFSIZE];
2930	struct inotify_event ev = (struct inotify_event )buf;
2931	int ofs;	3039	int ofs;
2932	int len = read (fs_fd, buf, sizeof (buf));	3040	int len = read (fs_fd, buf, sizeof (buf));
2933		3041
2934	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);
2935	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;
2936	}	3080	}
2937		3081
2938	inline_size void	3082	inline_size void
2939	check_2625 (EV_P)	3083	ev_check_2625 (EV_P)
2940	{	3084	{
2941	/* kernels < 2.6.25 are borked	3085	/* kernels < 2.6.25 are borked
2942	* 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
2943	*/	3087	*/
2944	struct utsname buf;	3088	if (ev_linux_version () < 0x020619)
2945	int major, minor, micro;
2946
2947	if (uname (&buf))
2948	return;	3089	return;
2949		3090
2950	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2951	return;
2952
2953	if (major < 2
2954	\|\| (major == 2 && minor < 6)
2955	\|\| (major == 2 && minor == 6 && micro < 25))
2956	return;
2957
2958	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 ();
2959	}	3103	}
2960		3104
2961	inline_size void	3105	inline_size void
2962	infy_init (EV_P)	3106	infy_init (EV_P)
2963	{	3107	{
2964	if (fs_fd != -2)	3108	if (fs_fd != -2)
2965	return;	3109	return;
2966		3110
2967	fs_fd = -1;	3111	fs_fd = -1;
2968		3112
2969	check_2625 (EV_A);	3113	ev_check_2625 (EV_A);
2970		3114
2971	fs_fd = inotify_init ();	3115	fs_fd = infy_newfd ();
2972		3116
2973	if (fs_fd >= 0)	3117	if (fs_fd >= 0)
2974	{	3118	{
		3119	fd_intern (fs_fd);
2975	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3120	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2976	ev_set_priority (&fs_w, EV_MAXPRI);	3121	ev_set_priority (&fs_w, EV_MAXPRI);
2977	ev_io_start (EV_A_ &fs_w);	3122	ev_io_start (EV_A_ &fs_w);
		3123	ev_unref (EV_A);
2978	}	3124	}
2979	}	3125	}
2980		3126
2981	inline_size void	3127	inline_size void
2982	infy_fork (EV_P)	3128	infy_fork (EV_P)
…		…
2984	int slot;	3130	int slot;
2985		3131
2986	if (fs_fd < 0)	3132	if (fs_fd < 0)
2987	return;	3133	return;
2988		3134
		3135	ev_ref (EV_A);
		3136	ev_io_stop (EV_A_ &fs_w);
2989	close (fs_fd);	3137	close (fs_fd);
2990	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	}
2991		3147
2992	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3148	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2993	{	3149	{
2994	WL w_ = fs_hash [slot].head;	3150	WL w_ = fs_hash [slot].head;
2995	fs_hash [slot].head = 0;	3151	fs_hash [slot].head = 0;
…		…
3002	w->wd = -1;	3158	w->wd = -1;
3003		3159
3004	if (fs_fd >= 0)	3160	if (fs_fd >= 0)
3005	infy_add (EV_A_ w); /* re-add, no matter what */	3161	infy_add (EV_A_ w); /* re-add, no matter what */
3006	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);
3007	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	}
3008	}	3169	}
3009	}	3170	}
3010	}	3171	}
3011		3172
3012	#endif	3173	#endif
…		…
3029	static void noinline	3190	static void noinline
3030	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3191	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3031	{	3192	{
3032	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));	3193	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
3033		3194
3034	/* we copy this here each the time so that */	3195	ev_statdata prev = w->attr;
3035	/* prev has the old value when the callback gets invoked */
3036	w->prev = w->attr;
3037	ev_stat_stat (EV_A_ w);	3196	ev_stat_stat (EV_A_ w);
3038		3197
3039	/* 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 */
3040	if (	3199	if (
3041	w->prev.st_dev != w->attr.st_dev	3200	prev.st_dev != w->attr.st_dev
3042	\|\| w->prev.st_ino != w->attr.st_ino	3201	\|\| prev.st_ino != w->attr.st_ino
3043	\|\| w->prev.st_mode != w->attr.st_mode	3202	\|\| prev.st_mode != w->attr.st_mode
3044	\|\| w->prev.st_nlink != w->attr.st_nlink	3203	\|\| prev.st_nlink != w->attr.st_nlink
3045	\|\| w->prev.st_uid != w->attr.st_uid	3204	\|\| prev.st_uid != w->attr.st_uid
3046	\|\| w->prev.st_gid != w->attr.st_gid	3205	\|\| prev.st_gid != w->attr.st_gid
3047	\|\| w->prev.st_rdev != w->attr.st_rdev	3206	\|\| prev.st_rdev != w->attr.st_rdev
3048	\|\| w->prev.st_size != w->attr.st_size	3207	\|\| prev.st_size != w->attr.st_size
3049	\|\| w->prev.st_atime != w->attr.st_atime	3208	\|\| prev.st_atime != w->attr.st_atime
3050	\|\| w->prev.st_mtime != w->attr.st_mtime	3209	\|\| prev.st_mtime != w->attr.st_mtime
3051	\|\| w->prev.st_ctime != w->attr.st_ctime	3210	\|\| prev.st_ctime != w->attr.st_ctime
3052	) {	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
3053	#if EV_USE_INOTIFY	3217	#if EV_USE_INOTIFY
3054	if (fs_fd >= 0)	3218	if (fs_fd >= 0)
3055	{	3219	{
3056	infy_del (EV_A_ w);	3220	infy_del (EV_A_ w);
3057	infy_add (EV_A_ w);	3221	infy_add (EV_A_ w);
…		…
3082		3246
3083	if (fs_fd >= 0)	3247	if (fs_fd >= 0)
3084	infy_add (EV_A_ w);	3248	infy_add (EV_A_ w);
3085	else	3249	else
3086	#endif	3250	#endif
		3251	{
3087	ev_timer_again (EV_A_ &w->timer);	3252	ev_timer_again (EV_A_ &w->timer);
		3253	ev_unref (EV_A);
		3254	}
3088		3255
3089	ev_start (EV_A_ (W)w, 1);	3256	ev_start (EV_A_ (W)w, 1);
3090		3257
3091	EV_FREQUENT_CHECK;	3258	EV_FREQUENT_CHECK;
3092	}	3259	}
…		…
3101	EV_FREQUENT_CHECK;	3268	EV_FREQUENT_CHECK;
3102		3269
3103	#if EV_USE_INOTIFY	3270	#if EV_USE_INOTIFY
3104	infy_del (EV_A_ w);	3271	infy_del (EV_A_ w);
3105	#endif	3272	#endif
		3273
		3274	if (ev_is_active (&w->timer))
		3275	{
		3276	ev_ref (EV_A);
3106	ev_timer_stop (EV_A_ &w->timer);	3277	ev_timer_stop (EV_A_ &w->timer);
		3278	}
3107		3279
3108	ev_stop (EV_A_ (W)w);	3280	ev_stop (EV_A_ (W)w);
3109		3281
3110	EV_FREQUENT_CHECK;	3282	EV_FREQUENT_CHECK;
3111	}	3283	}
…		…
3156		3328
3157	EV_FREQUENT_CHECK;	3329	EV_FREQUENT_CHECK;
3158	}	3330	}
3159	#endif	3331	#endif
3160		3332
		3333	#if EV_PREPARE_ENABLE
3161	void	3334	void
3162	ev_prepare_start (EV_P_ ev_prepare *w)	3335	ev_prepare_start (EV_P_ ev_prepare *w)
3163	{	3336	{
3164	if (expect_false (ev_is_active (w)))	3337	if (expect_false (ev_is_active (w)))
3165	return;	3338	return;
…		…
3191		3364
3192	ev_stop (EV_A_ (W)w);	3365	ev_stop (EV_A_ (W)w);
3193		3366
3194	EV_FREQUENT_CHECK;	3367	EV_FREQUENT_CHECK;
3195	}	3368	}
		3369	#endif
3196		3370
		3371	#if EV_CHECK_ENABLE
3197	void	3372	void
3198	ev_check_start (EV_P_ ev_check *w)	3373	ev_check_start (EV_P_ ev_check *w)
3199	{	3374	{
3200	if (expect_false (ev_is_active (w)))	3375	if (expect_false (ev_is_active (w)))
3201	return;	3376	return;
…		…
3227		3402
3228	ev_stop (EV_A_ (W)w);	3403	ev_stop (EV_A_ (W)w);
3229		3404
3230	EV_FREQUENT_CHECK;	3405	EV_FREQUENT_CHECK;
3231	}	3406	}
		3407	#endif
3232		3408
3233	#if EV_EMBED_ENABLE	3409	#if EV_EMBED_ENABLE
3234	void noinline	3410	void noinline
3235	ev_embed_sweep (EV_P_ ev_embed *w)	3411	ev_embed_sweep (EV_P_ ev_embed *w)
3236	{	3412	{
…		…
3331		3507
3332	ev_io_stop (EV_A_ &w->io);	3508	ev_io_stop (EV_A_ &w->io);
3333	ev_prepare_stop (EV_A_ &w->prepare);	3509	ev_prepare_stop (EV_A_ &w->prepare);
3334	ev_fork_stop (EV_A_ &w->fork);	3510	ev_fork_stop (EV_A_ &w->fork);
3335		3511
		3512	ev_stop (EV_A_ (W)w);
		3513
3336	EV_FREQUENT_CHECK;	3514	EV_FREQUENT_CHECK;
3337	}	3515	}
3338	#endif	3516	#endif
3339		3517
3340	#if EV_FORK_ENABLE	3518	#if EV_FORK_ENABLE
…		…
3416		3594
3417	void	3595	void
3418	ev_async_send (EV_P_ ev_async *w)	3596	ev_async_send (EV_P_ ev_async *w)
3419	{	3597	{
3420	w->sent = 1;	3598	w->sent = 1;
3421	evpipe_write (EV_A_ &gotasync);	3599	evpipe_write (EV_A_ &async_pending);
3422	}	3600	}
3423	#endif	3601	#endif
3424		3602
3425	/*****************************************************************************/	3603	/*****************************************************************************/
3426		3604
…		…
3563	if (types & EV_ASYNC)	3741	if (types & EV_ASYNC)
3564	for (i = asynccnt; i--; )	3742	for (i = asynccnt; i--; )
3565	cb (EV_A_ EV_ASYNC, asyncs [i]);	3743	cb (EV_A_ EV_ASYNC, asyncs [i]);
3566	#endif	3744	#endif
3567		3745
		3746	#if EV_PREPARE_ENABLE
3568	if (types & EV_PREPARE)	3747	if (types & EV_PREPARE)
3569	for (i = preparecnt; i--; )	3748	for (i = preparecnt; i--; )
3570	#if EV_EMBED_ENABLE	3749	# if EV_EMBED_ENABLE
3571	if (ev_cb (prepares [i]) != embed_prepare_cb)	3750	if (ev_cb (prepares [i]) != embed_prepare_cb)
3572	#endif	3751	# endif
3573	cb (EV_A_ EV_PREPARE, prepares [i]);	3752	cb (EV_A_ EV_PREPARE, prepares [i]);
		3753	#endif
3574		3754
		3755	#if EV_CHECK_ENABLE
3575	if (types & EV_CHECK)	3756	if (types & EV_CHECK)
3576	for (i = checkcnt; i--; )	3757	for (i = checkcnt; i--; )
3577	cb (EV_A_ EV_CHECK, checks [i]);	3758	cb (EV_A_ EV_CHECK, checks [i]);
		3759	#endif
3578		3760
		3761	#if EV_SIGNAL_ENABLE
3579	if (types & EV_SIGNAL)	3762	if (types & EV_SIGNAL)
3580	for (i = 0; i < EV_NSIG - 1; ++i)	3763	for (i = 0; i < EV_NSIG - 1; ++i)
3581	for (wl = signals [i].head; wl; )	3764	for (wl = signals [i].head; wl; )
3582	{	3765	{
3583	wn = wl->next;	3766	wn = wl->next;
3584	cb (EV_A_ EV_SIGNAL, wl);	3767	cb (EV_A_ EV_SIGNAL, wl);
3585	wl = wn;	3768	wl = wn;
3586	}	3769	}
		3770	#endif
3587		3771
		3772	#if EV_CHILD_ENABLE
3588	if (types & EV_CHILD)	3773	if (types & EV_CHILD)
3589	for (i = EV_PID_HASHSIZE; i--; )	3774	for (i = EV_PID_HASHSIZE; i--; )
3590	for (wl = childs [i]; wl; )	3775	for (wl = childs [i]; wl; )
3591	{	3776	{
3592	wn = wl->next;	3777	wn = wl->next;
3593	cb (EV_A_ EV_CHILD, wl);	3778	cb (EV_A_ EV_CHILD, wl);
3594	wl = wn;	3779	wl = wn;
3595	}	3780	}
		3781	#endif
3596	/* EV_STAT 0x00001000 /* stat data changed */	3782	/* EV_STAT 0x00001000 /* stat data changed */
3597	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */	3783	/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3598	}	3784	}
3599	#endif	3785	#endif
3600		3786

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Comparing libev/ev.c (file contents): Revision 1.306 by root, Sun Jul 19 06:35:25 2009 UTC vs. Revision 1.337 by root, Wed Mar 10 09:18:24 2010 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.306 by root, Sun Jul 19 06:35:25 2009 UTC vs.
Revision 1.337 by root, Wed Mar 10 09:18:24 2010 UTC