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

Comparing libev/ev.c (file contents):
Revision 1.301 by root, Wed Jul 15 16:58:53 2009 UTC vs.
Revision 1.332 by root, Tue Mar 9 08:58:17 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
…		…
419		509
420	#if EV_USE_MONOTONIC	510	#if EV_USE_MONOTONIC
421	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? */
422	#endif	512	#endif
423		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
424	#ifdef _WIN32	524	#ifdef _WIN32
425	# include "ev_win32.c"	525	# include "ev_win32.c"
426	#endif	526	#endif
427		527
428	/*****************************************************************************/	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
429		537
430	static void (syserr_cb)(const char msg);	538	static void (syserr_cb)(const char msg);
431		539
432	void	540	void
433	ev_set_syserr_cb (void (cb)(const char msg))	541	ev_set_syserr_cb (void (cb)(const char msg))
…		…
443		551
444	if (syserr_cb)	552	if (syserr_cb)
445	syserr_cb (msg);	553	syserr_cb (msg);
446	else	554	else
447	{	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
448	perror (msg);	564	perror (msg);
		565	#endif
449	abort ();	566	abort ();
450	}	567	}
451	}	568	}
452		569
453	static void *	570	static void *
…		…
455	{	572	{
456	/* some systems, notably openbsd and darwin, fail to properly	573	/* some systems, notably openbsd and darwin, fail to properly
457	* implement realloc (x, 0) (as required by both ansi c-98 and	574	* implement realloc (x, 0) (as required by both ansi c-98 and
458	* the single unix specification, so work around them here.	575	* the single unix specification, so work around them here.
459	*/	576	*/
460
461	if (size)	577	if (size)
462	return realloc (ptr, size);	578	return realloc (ptr, size);
463		579
464	free (ptr);	580	free (ptr);
465	return 0;	581	return 0;
…		…
478	{	594	{
479	ptr = alloc (ptr, size);	595	ptr = alloc (ptr, size);
480		596
481	if (!ptr && size)	597	if (!ptr && size)
482	{	598	{
		599	#if EV_AVOID_STDIO
		600	ev_printerr ("libev: memory allocation failed, aborting.\n");
		601	#else
483	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	602	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		603	#endif
484	abort ();	604	abort ();
485	}	605	}
486		606
487	return ptr;	607	return ptr;
488	}	608	}
…		…
647		767
648	tv.tv_sec = (time_t)delay;	768	tv.tv_sec = (time_t)delay;
649	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);	769	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
650		770
651	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */	771	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
652	/* somehting not guaranteed by newer posix versions, but guaranteed */	772	/* something not guaranteed by newer posix versions, but guaranteed */
653	/* by older ones */	773	/* by older ones */
654	select (0, 0, 0, 0, &tv);	774	select (0, 0, 0, 0, &tv);
655	#endif	775	#endif
656	}	776	}
657	}	777	}
…		…
819		939
820	#if EV_SELECT_IS_WINSOCKET	940	#if EV_SELECT_IS_WINSOCKET
821	if (events)	941	if (events)
822	{	942	{
823	unsigned long arg;	943	unsigned long arg;
824	#ifdef EV_FD_TO_WIN32_HANDLE
825	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	944	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
826	#else
827	anfd->handle = _get_osfhandle (fd);
828	#endif
829	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));	945	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
830	}	946	}
831	#endif	947	#endif
832		948
833	{	949	{
…		…
876	/* check whether the given fd is atcually valid, for error recovery */	992	/* check whether the given fd is atcually valid, for error recovery */
877	inline_size int	993	inline_size int
878	fd_valid (int fd)	994	fd_valid (int fd)
879	{	995	{
880	#ifdef _WIN32	996	#ifdef _WIN32
881	return _get_osfhandle (fd) != -1;	997	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
882	#else	998	#else
883	return fcntl (fd, F_GETFD) != -1;	999	return fcntl (fd, F_GETFD) != -1;
884	#endif	1000	#endif
885	}	1001	}
886		1002
…		…
904		1020
905	for (fd = anfdmax; fd--; )	1021	for (fd = anfdmax; fd--; )
906	if (anfds [fd].events)	1022	if (anfds [fd].events)
907	{	1023	{
908	fd_kill (EV_A_ fd);	1024	fd_kill (EV_A_ fd);
909	return;	1025	break;
910	}	1026	}
911	}	1027	}
912		1028
913	/* usually called after fork if backend needs to re-arm all fds from scratch */	1029	/* usually called after fork if backend needs to re-arm all fds from scratch */
914	static void noinline	1030	static void noinline
…		…
1004		1120
1005	for (;;)	1121	for (;;)
1006	{	1122	{
1007	int c = k << 1;	1123	int c = k << 1;
1008		1124
1009	if (c > N + HEAP0 - 1)	1125	if (c >= N + HEAP0)
1010	break;	1126	break;
1011		1127
1012	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])	1128	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1013	? 1 : 0;	1129	? 1 : 0;
1014		1130
…		…
1050		1166
1051	/* move an element suitably so it is in a correct place */	1167	/* move an element suitably so it is in a correct place */
1052	inline_size void	1168	inline_size void
1053	adjustheap (ANHE *heap, int N, int k)	1169	adjustheap (ANHE *heap, int N, int k)
1054	{	1170	{
1055	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1171	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1056	upheap (heap, k);	1172	upheap (heap, k);
1057	else	1173	else
1058	downheap (heap, N, k);	1174	downheap (heap, N, k);
1059	}	1175	}
1060		1176
…		…
1073	/*****************************************************************************/	1189	/*****************************************************************************/
1074		1190
1075	/* associate signal watchers to a signal signal */	1191	/* associate signal watchers to a signal signal */
1076	typedef struct	1192	typedef struct
1077	{	1193	{
		1194	EV_ATOMIC_T pending;
		1195	#if EV_MULTIPLICITY
		1196	EV_P;
		1197	#endif
1078	WL head;	1198	WL head;
1079	EV_ATOMIC_T gotsig;
1080	} ANSIG;	1199	} ANSIG;
1081		1200
1082	static ANSIG *signals;	1201	static ANSIG signals [EV_NSIG - 1];
1083	static int signalmax;
1084
1085	static EV_ATOMIC_T gotsig;
1086		1202
1087	/*****************************************************************************/	1203	/*****************************************************************************/
1088		1204
1089	/* used to prepare libev internal fd's */	1205	/* used to prepare libev internal fd's */
1090	/* this is not fork-safe */	1206	/* this is not fork-safe */
1091	inline_speed void	1207	inline_speed void
1092	fd_intern (int fd)	1208	fd_intern (int fd)
1093	{	1209	{
1094	#ifdef _WIN32	1210	#ifdef _WIN32
1095	unsigned long arg = 1;	1211	unsigned long arg = 1;
1096	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1212	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1097	#else	1213	#else
1098	fcntl (fd, F_SETFD, FD_CLOEXEC);	1214	fcntl (fd, F_SETFD, FD_CLOEXEC);
1099	fcntl (fd, F_SETFL, O_NONBLOCK);	1215	fcntl (fd, F_SETFL, O_NONBLOCK);
1100	#endif	1216	#endif
1101	}	1217	}
…		…
1104	evpipe_init (EV_P)	1220	evpipe_init (EV_P)
1105	{	1221	{
1106	if (!ev_is_active (&pipe_w))	1222	if (!ev_is_active (&pipe_w))
1107	{	1223	{
1108	#if EV_USE_EVENTFD	1224	#if EV_USE_EVENTFD
		1225	evfd = eventfd (0, EFD_NONBLOCK \| EFD_CLOEXEC);
		1226	if (evfd < 0 && errno == EINVAL)
1109	if ((evfd = eventfd (0, 0)) >= 0)	1227	evfd = eventfd (0, 0);
		1228
		1229	if (evfd >= 0)
1110	{	1230	{
1111	evpipe [0] = -1;	1231	evpipe [0] = -1;
1112	fd_intern (evfd);	1232	fd_intern (evfd); /* doing it twice doesn't hurt */
1113	ev_io_set (&pipe_w, evfd, EV_READ);	1233	ev_io_set (&pipe_w, evfd, EV_READ);
1114	}	1234	}
1115	else	1235	else
1116	#endif	1236	#endif
1117	{	1237	{
…		…
1154	/* called whenever the libev signal pipe */	1274	/* called whenever the libev signal pipe */
1155	/* got some events (signal, async) */	1275	/* got some events (signal, async) */
1156	static void	1276	static void
1157	pipecb (EV_P_ ev_io *iow, int revents)	1277	pipecb (EV_P_ ev_io *iow, int revents)
1158	{	1278	{
		1279	int i;
		1280
1159	#if EV_USE_EVENTFD	1281	#if EV_USE_EVENTFD
1160	if (evfd >= 0)	1282	if (evfd >= 0)
1161	{	1283	{
1162	uint64_t counter;	1284	uint64_t counter;
1163	read (evfd, &counter, sizeof (uint64_t));	1285	read (evfd, &counter, sizeof (uint64_t));
…		…
1167	{	1289	{
1168	char dummy;	1290	char dummy;
1169	read (evpipe [0], &dummy, 1);	1291	read (evpipe [0], &dummy, 1);
1170	}	1292	}
1171		1293
1172	if (gotsig && ev_is_default_loop (EV_A))	1294	if (sig_pending)
1173	{	1295	{
1174	int signum;	1296	sig_pending = 0;
1175	gotsig = 0;
1176		1297
1177	for (signum = signalmax; signum--; )	1298	for (i = EV_NSIG - 1; i--; )
1178	if (signals [signum].gotsig)	1299	if (expect_false (signals [i].pending))
1179	ev_feed_signal_event (EV_A_ signum + 1);	1300	ev_feed_signal_event (EV_A_ i + 1);
1180	}	1301	}
1181		1302
1182	#if EV_ASYNC_ENABLE	1303	#if EV_ASYNC_ENABLE
1183	if (gotasync)	1304	if (async_pending)
1184	{	1305	{
1185	int i;	1306	async_pending = 0;
1186	gotasync = 0;
1187		1307
1188	for (i = asynccnt; i--; )	1308	for (i = asynccnt; i--; )
1189	if (asyncs [i]->sent)	1309	if (asyncs [i]->sent)
1190	{	1310	{
1191	asyncs [i]->sent = 0;	1311	asyncs [i]->sent = 0;
…		…
1199		1319
1200	static void	1320	static void
1201	ev_sighandler (int signum)	1321	ev_sighandler (int signum)
1202	{	1322	{
1203	#if EV_MULTIPLICITY	1323	#if EV_MULTIPLICITY
1204	struct ev_loop *loop = &default_loop_struct;	1324	EV_P = signals [signum - 1].loop;
1205	#endif	1325	#endif
1206		1326
1207	#if _WIN32	1327	#ifdef _WIN32
1208	signal (signum, ev_sighandler);	1328	signal (signum, ev_sighandler);
1209	#endif	1329	#endif
1210		1330
1211	signals [signum - 1].gotsig = 1;	1331	signals [signum - 1].pending = 1;
1212	evpipe_write (EV_A_ &gotsig);	1332	evpipe_write (EV_A_ &sig_pending);
1213	}	1333	}
1214		1334
1215	void noinline	1335	void noinline
1216	ev_feed_signal_event (EV_P_ int signum)	1336	ev_feed_signal_event (EV_P_ int signum)
1217	{	1337	{
1218	WL w;	1338	WL w;
1219		1339
		1340	if (expect_false (signum <= 0 \|\| signum > EV_NSIG))
		1341	return;
		1342
		1343	--signum;
		1344
1220	#if EV_MULTIPLICITY	1345	#if EV_MULTIPLICITY
1221	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1346	/* it is permissible to try to feed a signal to the wrong loop */
1222	#endif	1347	/* or, likely more useful, feeding a signal nobody is waiting for */
1223		1348
1224	--signum;	1349	if (expect_false (signals [signum].loop != EV_A))
1225
1226	if (signum < 0 \|\| signum >= signalmax)
1227	return;	1350	return;
		1351	#endif
1228		1352
1229	signals [signum].gotsig = 0;	1353	signals [signum].pending = 0;
1230		1354
1231	for (w = signals [signum].head; w; w = w->next)	1355	for (w = signals [signum].head; w; w = w->next)
1232	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1356	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1233	}	1357	}
		1358
		1359	#if EV_USE_SIGNALFD
		1360	static void
		1361	sigfdcb (EV_P_ ev_io *iow, int revents)
		1362	{
		1363	struct signalfd_siginfo si[2], sip; / these structs are big */
		1364
		1365	for (;;)
		1366	{
		1367	ssize_t res = read (sigfd, si, sizeof (si));
		1368
		1369	/* not ISO-C, as res might be -1, but works with SuS */
		1370	for (sip = si; (char )sip < (char )si + res; ++sip)
		1371	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1372
		1373	if (res < (ssize_t)sizeof (si))
		1374	break;
		1375	}
		1376	}
		1377	#endif
1234		1378
1235	/*****************************************************************************/	1379	/*****************************************************************************/
1236		1380
1237	static WL childs [EV_PID_HASHSIZE];	1381	static WL childs [EV_PID_HASHSIZE];
1238		1382
…		…
1458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1602	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1459	have_monotonic = 1;	1603	have_monotonic = 1;
1460	}	1604	}
1461	#endif	1605	#endif
1462		1606
		1607	/* pid check not overridable via env */
		1608	#ifndef _WIN32
		1609	if (flags & EVFLAG_FORKCHECK)
		1610	curpid = getpid ();
		1611	#endif
		1612
		1613	if (!(flags & EVFLAG_NOENV)
		1614	&& !enable_secure ()
		1615	&& getenv ("LIBEV_FLAGS"))
		1616	flags = atoi (getenv ("LIBEV_FLAGS"));
		1617
1463	ev_rt_now = ev_time ();	1618	ev_rt_now = ev_time ();
1464	mn_now = get_clock ();	1619	mn_now = get_clock ();
1465	now_floor = mn_now;	1620	now_floor = mn_now;
1466	rtmn_diff = ev_rt_now - mn_now;	1621	rtmn_diff = ev_rt_now - mn_now;
1467	#if EV_MINIMAL < 2	1622	#if EV_MINIMAL < 2
…		…
1470		1625
1471	io_blocktime = 0.;	1626	io_blocktime = 0.;
1472	timeout_blocktime = 0.;	1627	timeout_blocktime = 0.;
1473	backend = 0;	1628	backend = 0;
1474	backend_fd = -1;	1629	backend_fd = -1;
1475	gotasync = 0;	1630	sig_pending = 0;
		1631	#if EV_ASYNC_ENABLE
		1632	async_pending = 0;
		1633	#endif
1476	#if EV_USE_INOTIFY	1634	#if EV_USE_INOTIFY
1477	fs_fd = -2;	1635	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1478	#endif	1636	#endif
1479		1637	#if EV_USE_SIGNALFD
1480	/* pid check not overridable via env */	1638	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1481	#ifndef _WIN32
1482	if (flags & EVFLAG_FORKCHECK)
1483	curpid = getpid ();
1484	#endif	1639	#endif
1485
1486	if (!(flags & EVFLAG_NOENV)
1487	&& !enable_secure ()
1488	&& getenv ("LIBEV_FLAGS"))
1489	flags = atoi (getenv ("LIBEV_FLAGS"));
1490		1640
1491	if (!(flags & 0x0000ffffU))	1641	if (!(flags & 0x0000ffffU))
1492	flags \|= ev_recommended_backends ();	1642	flags \|= ev_recommended_backends ();
1493		1643
1494	#if EV_USE_PORT	1644	#if EV_USE_PORT
…		…
1520	{	1670	{
1521	int i;	1671	int i;
1522		1672
1523	if (ev_is_active (&pipe_w))	1673	if (ev_is_active (&pipe_w))
1524	{	1674	{
1525	ev_ref (EV_A); /* signal watcher */	1675	/ev_ref (EV_A);/
1526	ev_io_stop (EV_A_ &pipe_w);	1676	/ev_io_stop (EV_A_ &pipe_w);/
1527		1677
1528	#if EV_USE_EVENTFD	1678	#if EV_USE_EVENTFD
1529	if (evfd >= 0)	1679	if (evfd >= 0)
1530	close (evfd);	1680	close (evfd);
1531	#endif	1681	#endif
1532		1682
1533	if (evpipe [0] >= 0)	1683	if (evpipe [0] >= 0)
1534	{	1684	{
1535	close (evpipe [0]);	1685	EV_WIN32_CLOSE_FD (evpipe [0]);
1536	close (evpipe [1]);	1686	EV_WIN32_CLOSE_FD (evpipe [1]);
1537	}	1687	}
1538	}	1688	}
		1689
		1690	#if EV_USE_SIGNALFD
		1691	if (ev_is_active (&sigfd_w))
		1692	close (sigfd);
		1693	#endif
1539		1694
1540	#if EV_USE_INOTIFY	1695	#if EV_USE_INOTIFY
1541	if (fs_fd >= 0)	1696	if (fs_fd >= 0)
1542	close (fs_fd);	1697	close (fs_fd);
1543	#endif	1698	#endif
…		…
1567	#if EV_IDLE_ENABLE	1722	#if EV_IDLE_ENABLE
1568	array_free (idle, [i]);	1723	array_free (idle, [i]);
1569	#endif	1724	#endif
1570	}	1725	}
1571		1726
1572	ev_free (anfds); anfdmax = 0;	1727	ev_free (anfds); anfds = 0; anfdmax = 0;
1573		1728
1574	/* have to use the microsoft-never-gets-it-right macro */	1729	/* have to use the microsoft-never-gets-it-right macro */
1575	array_free (rfeed, EMPTY);	1730	array_free (rfeed, EMPTY);
1576	array_free (fdchange, EMPTY);	1731	array_free (fdchange, EMPTY);
1577	array_free (timer, EMPTY);	1732	array_free (timer, EMPTY);
…		…
1612		1767
1613	if (ev_is_active (&pipe_w))	1768	if (ev_is_active (&pipe_w))
1614	{	1769	{
1615	/* this "locks" the handlers against writing to the pipe */	1770	/* this "locks" the handlers against writing to the pipe */
1616	/* while we modify the fd vars */	1771	/* while we modify the fd vars */
1617	gotsig = 1;	1772	sig_pending = 1;
1618	#if EV_ASYNC_ENABLE	1773	#if EV_ASYNC_ENABLE
1619	gotasync = 1;	1774	async_pending = 1;
1620	#endif	1775	#endif
1621		1776
1622	ev_ref (EV_A);	1777	ev_ref (EV_A);
1623	ev_io_stop (EV_A_ &pipe_w);	1778	ev_io_stop (EV_A_ &pipe_w);
1624		1779
…		…
1627	close (evfd);	1782	close (evfd);
1628	#endif	1783	#endif
1629		1784
1630	if (evpipe [0] >= 0)	1785	if (evpipe [0] >= 0)
1631	{	1786	{
1632	close (evpipe [0]);	1787	EV_WIN32_CLOSE_FD (evpipe [0]);
1633	close (evpipe [1]);	1788	EV_WIN32_CLOSE_FD (evpipe [1]);
1634	}	1789	}
1635		1790
1636	evpipe_init (EV_A);	1791	evpipe_init (EV_A);
1637	/* now iterate over everything, in case we missed something */	1792	/* now iterate over everything, in case we missed something */
1638	pipecb (EV_A_ &pipe_w, EV_READ);	1793	pipecb (EV_A_ &pipe_w, EV_READ);
…		…
1644	#if EV_MULTIPLICITY	1799	#if EV_MULTIPLICITY
1645		1800
1646	struct ev_loop *	1801	struct ev_loop *
1647	ev_loop_new (unsigned int flags)	1802	ev_loop_new (unsigned int flags)
1648	{	1803	{
1649	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));	1804	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1650		1805
1651	memset (loop, 0, sizeof (struct ev_loop));	1806	memset (EV_A, 0, sizeof (struct ev_loop));
1652
1653	loop_init (EV_A_ flags);	1807	loop_init (EV_A_ flags);
1654		1808
1655	if (ev_backend (EV_A))	1809	if (ev_backend (EV_A))
1656	return loop;	1810	return EV_A;
1657		1811
1658	return 0;	1812	return 0;
1659	}	1813	}
1660		1814
1661	void	1815	void
…		…
1765	assert (checkmax >= checkcnt);	1919	assert (checkmax >= checkcnt);
1766	array_verify (EV_A_ (W *)checks, checkcnt);	1920	array_verify (EV_A_ (W *)checks, checkcnt);
1767		1921
1768	# if 0	1922	# if 0
1769	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1923	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
1770	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)	1924	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1771	# endif	1925	# endif
1772	#endif	1926	#endif
1773	}	1927	}
1774	#endif	1928	#endif
1775		1929
…		…
1782	#endif	1936	#endif
1783	{	1937	{
1784	if (!ev_default_loop_ptr)	1938	if (!ev_default_loop_ptr)
1785	{	1939	{
1786	#if EV_MULTIPLICITY	1940	#if EV_MULTIPLICITY
1787	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1941	EV_P = ev_default_loop_ptr = &default_loop_struct;
1788	#else	1942	#else
1789	ev_default_loop_ptr = 1;	1943	ev_default_loop_ptr = 1;
1790	#endif	1944	#endif
1791		1945
1792	loop_init (EV_A_ flags);	1946	loop_init (EV_A_ flags);
…		…
1809		1963
1810	void	1964	void
1811	ev_default_destroy (void)	1965	ev_default_destroy (void)
1812	{	1966	{
1813	#if EV_MULTIPLICITY	1967	#if EV_MULTIPLICITY
1814	struct ev_loop *loop = ev_default_loop_ptr;	1968	EV_P = ev_default_loop_ptr;
1815	#endif	1969	#endif
1816		1970
1817	ev_default_loop_ptr = 0;	1971	ev_default_loop_ptr = 0;
1818		1972
1819	#ifndef _WIN32	1973	#ifndef _WIN32
…		…
1826		1980
1827	void	1981	void
1828	ev_default_fork (void)	1982	ev_default_fork (void)
1829	{	1983	{
1830	#if EV_MULTIPLICITY	1984	#if EV_MULTIPLICITY
1831	struct ev_loop *loop = ev_default_loop_ptr;	1985	EV_P = ev_default_loop_ptr;
1832	#endif	1986	#endif
1833		1987
1834	postfork = 1; /* must be in line with ev_loop_fork */	1988	postfork = 1; /* must be in line with ev_loop_fork */
1835	}	1989	}
1836		1990
…		…
2031	ANHE_at_cache (*he);	2185	ANHE_at_cache (*he);
2032	}	2186	}
2033	}	2187	}
2034		2188
2035	/* fetch new monotonic and realtime times from the kernel */	2189	/* fetch new monotonic and realtime times from the kernel */
2036	/* also detetc if there was a timejump, and act accordingly */	2190	/* also detect if there was a timejump, and act accordingly */
2037	inline_speed void	2191	inline_speed void
2038	time_update (EV_P_ ev_tstamp max_block)	2192	time_update (EV_P_ ev_tstamp max_block)
2039	{	2193	{
2040	#if EV_USE_MONOTONIC	2194	#if EV_USE_MONOTONIC
2041	if (expect_true (have_monotonic))	2195	if (expect_true (have_monotonic))
…		…
2302	inline_size void	2456	inline_size void
2303	wlist_del (WL *head, WL elem)	2457	wlist_del (WL *head, WL elem)
2304	{	2458	{
2305	while (*head)	2459	while (*head)
2306	{	2460	{
2307	if (*head == elem)	2461	if (expect_true (*head == elem))
2308	{	2462	{
2309	*head = elem->next;	2463	*head = elem->next;
2310	return;	2464	break;
2311	}	2465	}
2312		2466
2313	head = &(*head)->next;	2467	head = &(*head)->next;
2314	}	2468	}
2315	}	2469	}
…		…
2375		2529
2376	if (expect_false (ev_is_active (w)))	2530	if (expect_false (ev_is_active (w)))
2377	return;	2531	return;
2378		2532
2379	assert (("libev: ev_io_start called with negative fd", fd >= 0));	2533	assert (("libev: ev_io_start called with negative fd", fd >= 0));
2380	assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET \| EV_READ \| EV_WRITE))));	2534	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET \| EV_READ \| EV_WRITE))));
2381		2535
2382	EV_FREQUENT_CHECK;	2536	EV_FREQUENT_CHECK;
2383		2537
2384	ev_start (EV_A_ (W)w, 1);	2538	ev_start (EV_A_ (W)w, 1);
2385	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2539	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
…		…
2455	timers [active] = timers [timercnt + HEAP0];	2609	timers [active] = timers [timercnt + HEAP0];
2456	adjustheap (timers, timercnt, active);	2610	adjustheap (timers, timercnt, active);
2457	}	2611	}
2458	}	2612	}
2459		2613
2460	EV_FREQUENT_CHECK;
2461
2462	ev_at (w) -= mn_now;	2614	ev_at (w) -= mn_now;
2463		2615
2464	ev_stop (EV_A_ (W)w);	2616	ev_stop (EV_A_ (W)w);
		2617
		2618	EV_FREQUENT_CHECK;
2465	}	2619	}
2466		2620
2467	void noinline	2621	void noinline
2468	ev_timer_again (EV_P_ ev_timer *w)	2622	ev_timer_again (EV_P_ ev_timer *w)
2469	{	2623	{
…		…
2548	periodics [active] = periodics [periodiccnt + HEAP0];	2702	periodics [active] = periodics [periodiccnt + HEAP0];
2549	adjustheap (periodics, periodiccnt, active);	2703	adjustheap (periodics, periodiccnt, active);
2550	}	2704	}
2551	}	2705	}
2552		2706
2553	EV_FREQUENT_CHECK;
2554
2555	ev_stop (EV_A_ (W)w);	2707	ev_stop (EV_A_ (W)w);
		2708
		2709	EV_FREQUENT_CHECK;
2556	}	2710	}
2557		2711
2558	void noinline	2712	void noinline
2559	ev_periodic_again (EV_P_ ev_periodic *w)	2713	ev_periodic_again (EV_P_ ev_periodic *w)
2560	{	2714	{
…		…
2569	#endif	2723	#endif
2570		2724
2571	void noinline	2725	void noinline
2572	ev_signal_start (EV_P_ ev_signal *w)	2726	ev_signal_start (EV_P_ ev_signal *w)
2573	{	2727	{
2574	#if EV_MULTIPLICITY
2575	assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2576	#endif
2577	if (expect_false (ev_is_active (w)))	2728	if (expect_false (ev_is_active (w)))
2578	return;	2729	return;
2579		2730
2580	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));	2731	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2581		2732
2582	evpipe_init (EV_A);	2733	#if EV_MULTIPLICITY
		2734	assert (("libev: a signal must not be attached to two different loops",
		2735	!signals [w->signum - 1].loop \|\| signals [w->signum - 1].loop == loop));
2583		2736
2584	EV_FREQUENT_CHECK;	2737	signals [w->signum - 1].loop = EV_A;
		2738	#endif
2585		2739
		2740	EV_FREQUENT_CHECK;
		2741
		2742	#if EV_USE_SIGNALFD
		2743	if (sigfd == -2)
2586	{	2744	{
2587	#ifndef _WIN32	2745	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK \| SFD_CLOEXEC);
2588	sigset_t full, prev;	2746	if (sigfd < 0 && errno == EINVAL)
2589	sigfillset (&full);	2747	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2590	sigprocmask (SIG_SETMASK, &full, &prev);
2591	#endif
2592		2748
2593	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);	2749	if (sigfd >= 0)
		2750	{
		2751	fd_intern (sigfd); /* doing it twice will not hurt */
2594		2752
2595	#ifndef _WIN32	2753	sigemptyset (&sigfd_set);
2596	sigprocmask (SIG_SETMASK, &prev, 0);	2754
2597	#endif	2755	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2756	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2757	ev_io_start (EV_A_ &sigfd_w);
		2758	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2759	}
2598	}	2760	}
		2761
		2762	if (sigfd >= 0)
		2763	{
		2764	/* TODO: check .head */
		2765	sigaddset (&sigfd_set, w->signum);
		2766	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2767
		2768	signalfd (sigfd, &sigfd_set, 0);
		2769	}
		2770	#endif
2599		2771
2600	ev_start (EV_A_ (W)w, 1);	2772	ev_start (EV_A_ (W)w, 1);
2601	wlist_add (&signals [w->signum - 1].head, (WL)w);	2773	wlist_add (&signals [w->signum - 1].head, (WL)w);
2602		2774
2603	if (!((WL)w)->next)	2775	if (!((WL)w)->next)
		2776	# if EV_USE_SIGNALFD
		2777	if (sigfd < 0) /TODO/
		2778	# endif
2604	{	2779	{
2605	#if _WIN32	2780	# ifdef _WIN32
		2781	evpipe_init (EV_A);
		2782
2606	signal (w->signum, ev_sighandler);	2783	signal (w->signum, ev_sighandler);
2607	#else	2784	# else
2608	struct sigaction sa = { };	2785	struct sigaction sa;
		2786
		2787	evpipe_init (EV_A);
		2788
2609	sa.sa_handler = ev_sighandler;	2789	sa.sa_handler = ev_sighandler;
2610	sigfillset (&sa.sa_mask);	2790	sigfillset (&sa.sa_mask);
2611	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2791	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2612	sigaction (w->signum, &sa, 0);	2792	sigaction (w->signum, &sa, 0);
		2793
		2794	sigemptyset (&sa.sa_mask);
		2795	sigaddset (&sa.sa_mask, w->signum);
		2796	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2613	#endif	2797	#endif
2614	}	2798	}
2615		2799
2616	EV_FREQUENT_CHECK;	2800	EV_FREQUENT_CHECK;
2617	}	2801	}
2618		2802
2619	void noinline	2803	void noinline
…		…
2627		2811
2628	wlist_del (&signals [w->signum - 1].head, (WL)w);	2812	wlist_del (&signals [w->signum - 1].head, (WL)w);
2629	ev_stop (EV_A_ (W)w);	2813	ev_stop (EV_A_ (W)w);
2630		2814
2631	if (!signals [w->signum - 1].head)	2815	if (!signals [w->signum - 1].head)
		2816	{
		2817	#if EV_MULTIPLICITY
		2818	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2819	#endif
		2820	#if EV_USE_SIGNALFD
		2821	if (sigfd >= 0)
		2822	{
		2823	sigset_t ss;
		2824
		2825	sigemptyset (&ss);
		2826	sigaddset (&ss, w->signum);
		2827	sigdelset (&sigfd_set, w->signum);
		2828
		2829	signalfd (sigfd, &sigfd_set, 0);
		2830	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2831	}
		2832	else
		2833	#endif
2632	signal (w->signum, SIG_DFL);	2834	signal (w->signum, SIG_DFL);
		2835	}
2633		2836
2634	EV_FREQUENT_CHECK;	2837	EV_FREQUENT_CHECK;
2635	}	2838	}
2636		2839
2637	void	2840	void
…		…
2678	#define MIN_STAT_INTERVAL 0.1074891	2881	#define MIN_STAT_INTERVAL 0.1074891
2679		2882
2680	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2883	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2681		2884
2682	#if EV_USE_INOTIFY	2885	#if EV_USE_INOTIFY
2683	# define EV_INOTIFY_BUFSIZE 8192	2886
		2887	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2888	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2684		2889
2685	static void noinline	2890	static void noinline
2686	infy_add (EV_P_ ev_stat *w)	2891	infy_add (EV_P_ ev_stat *w)
2687	{	2892	{
2688	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);	2893	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);
2689		2894
2690	if (w->wd < 0)	2895	if (w->wd >= 0)
		2896	{
		2897	struct statfs sfs;
		2898
		2899	/* now local changes will be tracked by inotify, but remote changes won't */
		2900	/* unless the filesystem is known to be local, we therefore still poll */
		2901	/* also do poll on <2.6.25, but with normal frequency */
		2902
		2903	if (!fs_2625)
		2904	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2905	else if (!statfs (w->path, &sfs)
		2906	&& (sfs.f_type == 0x1373 /* devfs */
		2907	\|\| sfs.f_type == 0xEF53 /* ext2/3 */
		2908	\|\| sfs.f_type == 0x3153464a /* jfs */
		2909	\|\| sfs.f_type == 0x52654973 /* reiser3 */
		2910	\|\| sfs.f_type == 0x01021994 /* tempfs */
		2911	\|\| sfs.f_type == 0x58465342 /* xfs */))
		2912	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		2913	else
		2914	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2691	{	2915	}
		2916	else
		2917	{
		2918	/* can't use inotify, continue to stat */
2692	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;	2919	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2693	ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2694		2920
2695	/* monitor some parent directory for speedup hints */	2921	/* if path is not there, monitor some parent directory for speedup hints */
2696	/* note that exceeding the hardcoded path limit is not a correctness issue, */	2922	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2697	/* but an efficiency issue only */	2923	/* but an efficiency issue only */
2698	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2924	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
2699	{	2925	{
2700	char path [4096];	2926	char path [4096];
…		…
2716	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	2942	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
2717	}	2943	}
2718	}	2944	}
2719		2945
2720	if (w->wd >= 0)	2946	if (w->wd >= 0)
2721	{
2722	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2947	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2723		2948
2724	/* now local changes will be tracked by inotify, but remote changes won't */	2949	/* now re-arm timer, if required */
2725	/* unless the filesystem it known to be local, we therefore still poll */	2950	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2726	/* also do poll on <2.6.25, but with normal frequency */
2727	struct statfs sfs;
2728
2729	if (fs_2625 && !statfs (w->path, &sfs))
2730	if (sfs.f_type == 0x1373 /* devfs */
2731	\|\| sfs.f_type == 0xEF53 /* ext2/3 */
2732	\|\| sfs.f_type == 0x3153464a /* jfs */
2733	\|\| sfs.f_type == 0x52654973 /* reiser3 */
2734	\|\| sfs.f_type == 0x01021994 /* tempfs */
2735	\|\| sfs.f_type == 0x58465342 /* xfs */)
2736	return;
2737
2738	w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2739	ev_timer_again (EV_A_ &w->timer);	2951	ev_timer_again (EV_A_ &w->timer);
2740	}	2952	if (ev_is_active (&w->timer)) ev_unref (EV_A);
2741	}	2953	}
2742		2954
2743	static void noinline	2955	static void noinline
2744	infy_del (EV_P_ ev_stat *w)	2956	infy_del (EV_P_ ev_stat *w)
2745	{	2957	{
…		…
2790		3002
2791	static void	3003	static void
2792	infy_cb (EV_P_ ev_io *w, int revents)	3004	infy_cb (EV_P_ ev_io *w, int revents)
2793	{	3005	{
2794	char buf [EV_INOTIFY_BUFSIZE];	3006	char buf [EV_INOTIFY_BUFSIZE];
2795	struct inotify_event ev = (struct inotify_event )buf;
2796	int ofs;	3007	int ofs;
2797	int len = read (fs_fd, buf, sizeof (buf));	3008	int len = read (fs_fd, buf, sizeof (buf));
2798		3009
2799	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	3010	for (ofs = 0; ofs < len; )
		3011	{
		3012	struct inotify_event ev = (struct inotify_event )(buf + ofs);
2800	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3013	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3014	ofs += sizeof (struct inotify_event) + ev->len;
		3015	}
		3016	}
		3017
		3018	inline_size unsigned int
		3019	ev_linux_version (void)
		3020	{
		3021	struct utsname buf;
		3022	unsigned int v;
		3023	int i;
		3024	char *p = buf.release;
		3025
		3026	if (uname (&buf))
		3027	return 0;
		3028
		3029	for (i = 3+1; --i; )
		3030	{
		3031	unsigned int c = 0;
		3032
		3033	for (;;)
		3034	{
		3035	if (p >= '0' && p <= '9')
		3036	c = c * 10 + *p++ - '0';
		3037	else
		3038	{
		3039	p += *p == '.';
		3040	break;
		3041	}
		3042	}
		3043
		3044	v = (v << 8) \| c;
		3045	}
		3046
		3047	return v;
2801	}	3048	}
2802		3049
2803	inline_size void	3050	inline_size void
2804	check_2625 (EV_P)	3051	ev_check_2625 (EV_P)
2805	{	3052	{
2806	/* kernels < 2.6.25 are borked	3053	/* kernels < 2.6.25 are borked
2807	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3054	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2808	*/	3055	*/
2809	struct utsname buf;	3056	if (ev_linux_version () < 0x020619)
2810	int major, minor, micro;
2811
2812	if (uname (&buf))
2813	return;	3057	return;
2814		3058
2815	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2816	return;
2817
2818	if (major < 2
2819	\|\| (major == 2 && minor < 6)
2820	\|\| (major == 2 && minor == 6 && micro < 25))
2821	return;
2822
2823	fs_2625 = 1;	3059	fs_2625 = 1;
		3060	}
		3061
		3062	inline_size int
		3063	infy_newfd (void)
		3064	{
		3065	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3066	int fd = inotify_init1 (IN_CLOEXEC \| IN_NONBLOCK);
		3067	if (fd >= 0)
		3068	return fd;
		3069	#endif
		3070	return inotify_init ();
2824	}	3071	}
2825		3072
2826	inline_size void	3073	inline_size void
2827	infy_init (EV_P)	3074	infy_init (EV_P)
2828	{	3075	{
2829	if (fs_fd != -2)	3076	if (fs_fd != -2)
2830	return;	3077	return;
2831		3078
2832	fs_fd = -1;	3079	fs_fd = -1;
2833		3080
2834	check_2625 (EV_A);	3081	ev_check_2625 (EV_A);
2835		3082
2836	fs_fd = inotify_init ();	3083	fs_fd = infy_newfd ();
2837		3084
2838	if (fs_fd >= 0)	3085	if (fs_fd >= 0)
2839	{	3086	{
		3087	fd_intern (fs_fd);
2840	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3088	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2841	ev_set_priority (&fs_w, EV_MAXPRI);	3089	ev_set_priority (&fs_w, EV_MAXPRI);
2842	ev_io_start (EV_A_ &fs_w);	3090	ev_io_start (EV_A_ &fs_w);
		3091	ev_unref (EV_A);
2843	}	3092	}
2844	}	3093	}
2845		3094
2846	inline_size void	3095	inline_size void
2847	infy_fork (EV_P)	3096	infy_fork (EV_P)
…		…
2849	int slot;	3098	int slot;
2850		3099
2851	if (fs_fd < 0)	3100	if (fs_fd < 0)
2852	return;	3101	return;
2853		3102
		3103	ev_ref (EV_A);
		3104	ev_io_stop (EV_A_ &fs_w);
2854	close (fs_fd);	3105	close (fs_fd);
2855	fs_fd = inotify_init ();	3106	fs_fd = infy_newfd ();
		3107
		3108	if (fs_fd >= 0)
		3109	{
		3110	fd_intern (fs_fd);
		3111	ev_io_set (&fs_w, fs_fd, EV_READ);
		3112	ev_io_start (EV_A_ &fs_w);
		3113	ev_unref (EV_A);
		3114	}
2856		3115
2857	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3116	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2858	{	3117	{
2859	WL w_ = fs_hash [slot].head;	3118	WL w_ = fs_hash [slot].head;
2860	fs_hash [slot].head = 0;	3119	fs_hash [slot].head = 0;
…		…
2867	w->wd = -1;	3126	w->wd = -1;
2868		3127
2869	if (fs_fd >= 0)	3128	if (fs_fd >= 0)
2870	infy_add (EV_A_ w); /* re-add, no matter what */	3129	infy_add (EV_A_ w); /* re-add, no matter what */
2871	else	3130	else
		3131	{
		3132	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3133	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2872	ev_timer_again (EV_A_ &w->timer);	3134	ev_timer_again (EV_A_ &w->timer);
		3135	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3136	}
2873	}	3137	}
2874	}	3138	}
2875	}	3139	}
2876		3140
2877	#endif	3141	#endif
…		…
2894	static void noinline	3158	static void noinline
2895	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3159	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2896	{	3160	{
2897	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));	3161	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
2898		3162
2899	/* we copy this here each the time so that */	3163	ev_statdata prev = w->attr;
2900	/* prev has the old value when the callback gets invoked */
2901	w->prev = w->attr;
2902	ev_stat_stat (EV_A_ w);	3164	ev_stat_stat (EV_A_ w);
2903		3165
2904	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3166	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2905	if (	3167	if (
2906	w->prev.st_dev != w->attr.st_dev	3168	prev.st_dev != w->attr.st_dev
2907	\|\| w->prev.st_ino != w->attr.st_ino	3169	\|\| prev.st_ino != w->attr.st_ino
2908	\|\| w->prev.st_mode != w->attr.st_mode	3170	\|\| prev.st_mode != w->attr.st_mode
2909	\|\| w->prev.st_nlink != w->attr.st_nlink	3171	\|\| prev.st_nlink != w->attr.st_nlink
2910	\|\| w->prev.st_uid != w->attr.st_uid	3172	\|\| prev.st_uid != w->attr.st_uid
2911	\|\| w->prev.st_gid != w->attr.st_gid	3173	\|\| prev.st_gid != w->attr.st_gid
2912	\|\| w->prev.st_rdev != w->attr.st_rdev	3174	\|\| prev.st_rdev != w->attr.st_rdev
2913	\|\| w->prev.st_size != w->attr.st_size	3175	\|\| prev.st_size != w->attr.st_size
2914	\|\| w->prev.st_atime != w->attr.st_atime	3176	\|\| prev.st_atime != w->attr.st_atime
2915	\|\| w->prev.st_mtime != w->attr.st_mtime	3177	\|\| prev.st_mtime != w->attr.st_mtime
2916	\|\| w->prev.st_ctime != w->attr.st_ctime	3178	\|\| prev.st_ctime != w->attr.st_ctime
2917	) {	3179	) {
		3180	/* we only update w->prev on actual differences */
		3181	/* in case we test more often than invoke the callback, */
		3182	/* to ensure that prev is always different to attr */
		3183	w->prev = prev;
		3184
2918	#if EV_USE_INOTIFY	3185	#if EV_USE_INOTIFY
2919	if (fs_fd >= 0)	3186	if (fs_fd >= 0)
2920	{	3187	{
2921	infy_del (EV_A_ w);	3188	infy_del (EV_A_ w);
2922	infy_add (EV_A_ w);	3189	infy_add (EV_A_ w);
…		…
2947		3214
2948	if (fs_fd >= 0)	3215	if (fs_fd >= 0)
2949	infy_add (EV_A_ w);	3216	infy_add (EV_A_ w);
2950	else	3217	else
2951	#endif	3218	#endif
		3219	{
2952	ev_timer_again (EV_A_ &w->timer);	3220	ev_timer_again (EV_A_ &w->timer);
		3221	ev_unref (EV_A);
		3222	}
2953		3223
2954	ev_start (EV_A_ (W)w, 1);	3224	ev_start (EV_A_ (W)w, 1);
2955		3225
2956	EV_FREQUENT_CHECK;	3226	EV_FREQUENT_CHECK;
2957	}	3227	}
…		…
2966	EV_FREQUENT_CHECK;	3236	EV_FREQUENT_CHECK;
2967		3237
2968	#if EV_USE_INOTIFY	3238	#if EV_USE_INOTIFY
2969	infy_del (EV_A_ w);	3239	infy_del (EV_A_ w);
2970	#endif	3240	#endif
		3241
		3242	if (ev_is_active (&w->timer))
		3243	{
		3244	ev_ref (EV_A);
2971	ev_timer_stop (EV_A_ &w->timer);	3245	ev_timer_stop (EV_A_ &w->timer);
		3246	}
2972		3247
2973	ev_stop (EV_A_ (W)w);	3248	ev_stop (EV_A_ (W)w);
2974		3249
2975	EV_FREQUENT_CHECK;	3250	EV_FREQUENT_CHECK;
2976	}	3251	}
…		…
3117	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3392	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3118	{	3393	{
3119	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));	3394	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
3120		3395
3121	{	3396	{
3122	struct ev_loop *loop = w->other;	3397	EV_P = w->other;
3123		3398
3124	while (fdchangecnt)	3399	while (fdchangecnt)
3125	{	3400	{
3126	fd_reify (EV_A);	3401	fd_reify (EV_A);
3127	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3402	ev_loop (EV_A_ EVLOOP_NONBLOCK);
…		…
3135	ev_embed w = (ev_embed )(((char *)fork_w) - offsetof (ev_embed, fork));	3410	ev_embed w = (ev_embed )(((char *)fork_w) - offsetof (ev_embed, fork));
3136		3411
3137	ev_embed_stop (EV_A_ w);	3412	ev_embed_stop (EV_A_ w);
3138		3413
3139	{	3414	{
3140	struct ev_loop *loop = w->other;	3415	EV_P = w->other;
3141		3416
3142	ev_loop_fork (EV_A);	3417	ev_loop_fork (EV_A);
3143	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3418	ev_loop (EV_A_ EVLOOP_NONBLOCK);
3144	}	3419	}
3145		3420
…		…
3159	{	3434	{
3160	if (expect_false (ev_is_active (w)))	3435	if (expect_false (ev_is_active (w)))
3161	return;	3436	return;
3162		3437
3163	{	3438	{
3164	struct ev_loop *loop = w->other;	3439	EV_P = w->other;
3165	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3440	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3166	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);	3441	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3167	}	3442	}
3168		3443
3169	EV_FREQUENT_CHECK;	3444	EV_FREQUENT_CHECK;
…		…
3196		3471
3197	ev_io_stop (EV_A_ &w->io);	3472	ev_io_stop (EV_A_ &w->io);
3198	ev_prepare_stop (EV_A_ &w->prepare);	3473	ev_prepare_stop (EV_A_ &w->prepare);
3199	ev_fork_stop (EV_A_ &w->fork);	3474	ev_fork_stop (EV_A_ &w->fork);
3200		3475
		3476	ev_stop (EV_A_ (W)w);
		3477
3201	EV_FREQUENT_CHECK;	3478	EV_FREQUENT_CHECK;
3202	}	3479	}
3203	#endif	3480	#endif
3204		3481
3205	#if EV_FORK_ENABLE	3482	#if EV_FORK_ENABLE
…		…
3281		3558
3282	void	3559	void
3283	ev_async_send (EV_P_ ev_async *w)	3560	ev_async_send (EV_P_ ev_async *w)
3284	{	3561	{
3285	w->sent = 1;	3562	w->sent = 1;
3286	evpipe_write (EV_A_ &gotasync);	3563	evpipe_write (EV_A_ &async_pending);
3287	}	3564	}
3288	#endif	3565	#endif
3289		3566
3290	/*****************************************************************************/	3567	/*****************************************************************************/
3291		3568
…		…
3440	if (types & EV_CHECK)	3717	if (types & EV_CHECK)
3441	for (i = checkcnt; i--; )	3718	for (i = checkcnt; i--; )
3442	cb (EV_A_ EV_CHECK, checks [i]);	3719	cb (EV_A_ EV_CHECK, checks [i]);
3443		3720
3444	if (types & EV_SIGNAL)	3721	if (types & EV_SIGNAL)
3445	for (i = 0; i < signalmax; ++i)	3722	for (i = 0; i < EV_NSIG - 1; ++i)
3446	for (wl = signals [i].head; wl; )	3723	for (wl = signals [i].head; wl; )
3447	{	3724	{
3448	wn = wl->next;	3725	wn = wl->next;
3449	cb (EV_A_ EV_SIGNAL, wl);	3726	cb (EV_A_ EV_SIGNAL, wl);
3450	wl = wn;	3727	wl = wn;

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-–
+Removed lines
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+Changed lines
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Comparing libev/ev.c (file contents): Revision 1.301 by root, Wed Jul 15 16:58:53 2009 UTC vs. Revision 1.332 by root, Tue Mar 9 08:58:17 2010 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.301 by root, Wed Jul 15 16:58:53 2009 UTC vs.
Revision 1.332 by root, Tue Mar 9 08:58:17 2010 UTC