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

Comparing libev/ev.c (file contents):
Revision 1.302 by root, Thu Jul 16 15:08:08 2009 UTC vs.
Revision 1.330 by root, Tue Mar 9 08:46:17 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
…		…
178	# endif	188	# endif
179	#endif	189	#endif
180		190
181	/* this block tries to deduce configuration from header-defined symbols and defaults */	191	/* this block tries to deduce configuration from header-defined symbols and defaults */
182		192
		193	/* try to deduce the maximum number of signals on this platform */
		194	#if defined (EV_NSIG)
		195	/* use what's provided */
		196	#elif defined (NSIG)
		197	# define EV_NSIG (NSIG)
		198	#elif defined(_NSIG)
		199	# define EV_NSIG (_NSIG)
		200	#elif defined (SIGMAX)
		201	# define EV_NSIG (SIGMAX+1)
		202	#elif defined (SIG_MAX)
		203	# define EV_NSIG (SIG_MAX+1)
		204	#elif defined (_SIG_MAX)
		205	# define EV_NSIG (_SIG_MAX+1)
		206	#elif defined (MAXSIG)
		207	# define EV_NSIG (MAXSIG+1)
		208	#elif defined (MAX_SIG)
		209	# define EV_NSIG (MAX_SIG+1)
		210	#elif defined (SIGARRAYSIZE)
		211	# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
		212	#elif defined (_sys_nsig)
		213	# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
		214	#else
		215	# error "unable to find value for NSIG, please report"
		216	/* to make it compile regardless, just remove the above line */
		217	# define EV_NSIG 65
		218	#endif
		219
183	#ifndef EV_USE_CLOCK_SYSCALL	220	#ifndef EV_USE_CLOCK_SYSCALL
184	# if __linux && __GLIBC__ >= 2	221	# if __linux && __GLIBC__ >= 2
185	# define EV_USE_CLOCK_SYSCALL 1	222	# define EV_USE_CLOCK_SYSCALL 1
186	# else	223	# else
187	# define EV_USE_CLOCK_SYSCALL 0	224	# define EV_USE_CLOCK_SYSCALL 0
…		…
263	#ifndef EV_USE_EVENTFD	300	#ifndef EV_USE_EVENTFD
264	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))	301	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
265	# define EV_USE_EVENTFD 1	302	# define EV_USE_EVENTFD 1
266	# else	303	# else
267	# define EV_USE_EVENTFD 0	304	# define EV_USE_EVENTFD 0
		305	# endif
		306	#endif
		307
		308	#ifndef EV_USE_SIGNALFD
		309	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		310	# define EV_USE_SIGNALFD 1
		311	# else
		312	# define EV_USE_SIGNALFD 0
268	# endif	313	# endif
269	#endif	314	#endif
270		315
271	#if 0 /* debugging */	316	#if 0 /* debugging */
272	# define EV_VERIFY 3	317	# define EV_VERIFY 3
…		…
300	# endif	345	# endif
301	#endif	346	#endif
302		347
303	/* this block fixes any misconfiguration where we know we run into trouble otherwise */	348	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
304		349
		350	#ifdef _AIX
		351	/* AIX has a completely broken poll.h header */
		352	# undef EV_USE_POLL
		353	# define EV_USE_POLL 0
		354	#endif
		355
305	#ifndef CLOCK_MONOTONIC	356	#ifndef CLOCK_MONOTONIC
306	# undef EV_USE_MONOTONIC	357	# undef EV_USE_MONOTONIC
307	# define EV_USE_MONOTONIC 0	358	# define EV_USE_MONOTONIC 0
308	#endif	359	#endif
309		360
…		…
339	#endif	390	#endif
340		391
341	#if EV_USE_EVENTFD	392	#if EV_USE_EVENTFD
342	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */	393	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
343	# include <stdint.h>	394	# include <stdint.h>
		395	# ifndef EFD_NONBLOCK
		396	# define EFD_NONBLOCK O_NONBLOCK
		397	# endif
		398	# ifndef EFD_CLOEXEC
		399	# ifdef O_CLOEXEC
		400	# define EFD_CLOEXEC O_CLOEXEC
		401	# else
		402	# define EFD_CLOEXEC 02000000
		403	# endif
		404	# endif
344	# ifdef __cplusplus	405	# ifdef __cplusplus
345	extern "C" {	406	extern "C" {
346	# endif	407	# endif
347	int eventfd (unsigned int initval, int flags);	408	int (eventfd) (unsigned int initval, int flags);
348	# ifdef __cplusplus	409	# ifdef __cplusplus
349	}	410	}
350	# endif	411	# endif
351	#endif	412	#endif
		413
		414	#if EV_USE_SIGNALFD
		415	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		416	# include <stdint.h>
		417	# ifndef SFD_NONBLOCK
		418	# define SFD_NONBLOCK O_NONBLOCK
		419	# endif
		420	# ifndef SFD_CLOEXEC
		421	# ifdef O_CLOEXEC
		422	# define SFD_CLOEXEC O_CLOEXEC
		423	# else
		424	# define SFD_CLOEXEC 02000000
		425	# endif
		426	# endif
		427	# ifdef __cplusplus
		428	extern "C" {
		429	# endif
		430	int signalfd (int fd, const sigset_t *mask, int flags);
		431
		432	struct signalfd_siginfo
		433	{
		434	uint32_t ssi_signo;
		435	char pad[128 - sizeof (uint32_t)];
		436	};
		437	# ifdef __cplusplus
		438	}
		439	# endif
		440	#endif
		441
352		442
353	/**/	443	/**/
354		444
355	#if EV_VERIFY >= 3	445	#if EV_VERIFY >= 3
356	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)	446	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
…		…
368	*/	458	*/
369	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */	459	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
370		460
371	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	461	#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) */	462	#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		463
375	#if __GNUC__ >= 4	464	#if __GNUC__ >= 4
376	# define expect(expr,value) __builtin_expect ((expr),(value))	465	# define expect(expr,value) __builtin_expect ((expr),(value))
377	# define noinline __attribute__ ((noinline))	466	# define noinline __attribute__ ((noinline))
378	#else	467	#else
…		…
419		508
420	#if EV_USE_MONOTONIC	509	#if EV_USE_MONOTONIC
421	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	510	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
422	#endif	511	#endif
423		512
		513	#ifndef EV_FD_TO_WIN32_HANDLE
		514	# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
		515	#endif
		516	#ifndef EV_WIN32_HANDLE_TO_FD
		517	# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
		518	#endif
		519	#ifndef EV_WIN32_CLOSE_FD
		520	# define EV_WIN32_CLOSE_FD(fd) close (fd)
		521	#endif
		522
424	#ifdef _WIN32	523	#ifdef _WIN32
425	# include "ev_win32.c"	524	# include "ev_win32.c"
426	#endif	525	#endif
427		526
428	/*****************************************************************************/	527	/*****************************************************************************/
…		…
443		542
444	if (syserr_cb)	543	if (syserr_cb)
445	syserr_cb (msg);	544	syserr_cb (msg);
446	else	545	else
447	{	546	{
		547	#if EV_AVOID_STDIO
		548	write (STDERR_FILENO, msg, strlen (msg));
		549	write (STDERR_FILENO, ": ", 2);
		550	msg = strerror (errno);
		551	write (STDERR_FILENO, msg, strlen (msg));
		552	write (STDERR_FILENO, "\n", 1);
		553	#else
448	perror (msg);	554	perror (msg);
		555	#endif
449	abort ();	556	abort ();
450	}	557	}
451	}	558	}
452		559
453	static void *	560	static void *
…		…
478	{	585	{
479	ptr = alloc (ptr, size);	586	ptr = alloc (ptr, size);
480		587
481	if (!ptr && size)	588	if (!ptr && size)
482	{	589	{
		590	#if EV_AVOID_STDIO
		591	write (STDERR_FILENO, "libev: memory allocation failed, aborting.",
		592	sizeof ("libev: memory allocation failed, aborting.") - 1);
		593	#else
483	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	594	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		595	#endif
484	abort ();	596	abort ();
485	}	597	}
486		598
487	return ptr;	599	return ptr;
488	}	600	}
…		…
819		931
820	#if EV_SELECT_IS_WINSOCKET	932	#if EV_SELECT_IS_WINSOCKET
821	if (events)	933	if (events)
822	{	934	{
823	unsigned long arg;	935	unsigned long arg;
824	#ifdef EV_FD_TO_WIN32_HANDLE
825	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);	936	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));	937	assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
830	}	938	}
831	#endif	939	#endif
832		940
833	{	941	{
…		…
876	/* check whether the given fd is atcually valid, for error recovery */	984	/* check whether the given fd is atcually valid, for error recovery */
877	inline_size int	985	inline_size int
878	fd_valid (int fd)	986	fd_valid (int fd)
879	{	987	{
880	#ifdef _WIN32	988	#ifdef _WIN32
881	return _get_osfhandle (fd) != -1;	989	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
882	#else	990	#else
883	return fcntl (fd, F_GETFD) != -1;	991	return fcntl (fd, F_GETFD) != -1;
884	#endif	992	#endif
885	}	993	}
886		994
…		…
904		1012
905	for (fd = anfdmax; fd--; )	1013	for (fd = anfdmax; fd--; )
906	if (anfds [fd].events)	1014	if (anfds [fd].events)
907	{	1015	{
908	fd_kill (EV_A_ fd);	1016	fd_kill (EV_A_ fd);
909	return;	1017	break;
910	}	1018	}
911	}	1019	}
912		1020
913	/* usually called after fork if backend needs to re-arm all fds from scratch */	1021	/* usually called after fork if backend needs to re-arm all fds from scratch */
914	static void noinline	1022	static void noinline
…		…
1004		1112
1005	for (;;)	1113	for (;;)
1006	{	1114	{
1007	int c = k << 1;	1115	int c = k << 1;
1008		1116
1009	if (c > N + HEAP0 - 1)	1117	if (c >= N + HEAP0)
1010	break;	1118	break;
1011		1119
1012	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])	1120	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1013	? 1 : 0;	1121	? 1 : 0;
1014		1122
…		…
1050		1158
1051	/* move an element suitably so it is in a correct place */	1159	/* move an element suitably so it is in a correct place */
1052	inline_size void	1160	inline_size void
1053	adjustheap (ANHE *heap, int N, int k)	1161	adjustheap (ANHE *heap, int N, int k)
1054	{	1162	{
1055	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))	1163	if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1056	upheap (heap, k);	1164	upheap (heap, k);
1057	else	1165	else
1058	downheap (heap, N, k);	1166	downheap (heap, N, k);
1059	}	1167	}
1060		1168
…		…
1073	/*****************************************************************************/	1181	/*****************************************************************************/
1074		1182
1075	/* associate signal watchers to a signal signal */	1183	/* associate signal watchers to a signal signal */
1076	typedef struct	1184	typedef struct
1077	{	1185	{
		1186	EV_ATOMIC_T pending;
		1187	#if EV_MULTIPLICITY
		1188	EV_P;
		1189	#endif
1078	WL head;	1190	WL head;
1079	EV_ATOMIC_T gotsig;
1080	} ANSIG;	1191	} ANSIG;
1081		1192
1082	static ANSIG *signals;	1193	static ANSIG signals [EV_NSIG - 1];
1083	static int signalmax;
1084
1085	static EV_ATOMIC_T gotsig;
1086		1194
1087	/*****************************************************************************/	1195	/*****************************************************************************/
1088		1196
1089	/* used to prepare libev internal fd's */	1197	/* used to prepare libev internal fd's */
1090	/* this is not fork-safe */	1198	/* this is not fork-safe */
1091	inline_speed void	1199	inline_speed void
1092	fd_intern (int fd)	1200	fd_intern (int fd)
1093	{	1201	{
1094	#ifdef _WIN32	1202	#ifdef _WIN32
1095	unsigned long arg = 1;	1203	unsigned long arg = 1;
1096	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	1204	ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1097	#else	1205	#else
1098	fcntl (fd, F_SETFD, FD_CLOEXEC);	1206	fcntl (fd, F_SETFD, FD_CLOEXEC);
1099	fcntl (fd, F_SETFL, O_NONBLOCK);	1207	fcntl (fd, F_SETFL, O_NONBLOCK);
1100	#endif	1208	#endif
1101	}	1209	}
…		…
1104	evpipe_init (EV_P)	1212	evpipe_init (EV_P)
1105	{	1213	{
1106	if (!ev_is_active (&pipe_w))	1214	if (!ev_is_active (&pipe_w))
1107	{	1215	{
1108	#if EV_USE_EVENTFD	1216	#if EV_USE_EVENTFD
		1217	evfd = eventfd (0, EFD_NONBLOCK \| EFD_CLOEXEC);
		1218	if (evfd < 0 && errno == EINVAL)
1109	if ((evfd = eventfd (0, 0)) >= 0)	1219	evfd = eventfd (0, 0);
		1220
		1221	if (evfd >= 0)
1110	{	1222	{
1111	evpipe [0] = -1;	1223	evpipe [0] = -1;
1112	fd_intern (evfd);	1224	fd_intern (evfd); /* doing it twice doesn't hurt */
1113	ev_io_set (&pipe_w, evfd, EV_READ);	1225	ev_io_set (&pipe_w, evfd, EV_READ);
1114	}	1226	}
1115	else	1227	else
1116	#endif	1228	#endif
1117	{	1229	{
…		…
1154	/* called whenever the libev signal pipe */	1266	/* called whenever the libev signal pipe */
1155	/* got some events (signal, async) */	1267	/* got some events (signal, async) */
1156	static void	1268	static void
1157	pipecb (EV_P_ ev_io *iow, int revents)	1269	pipecb (EV_P_ ev_io *iow, int revents)
1158	{	1270	{
		1271	int i;
		1272
1159	#if EV_USE_EVENTFD	1273	#if EV_USE_EVENTFD
1160	if (evfd >= 0)	1274	if (evfd >= 0)
1161	{	1275	{
1162	uint64_t counter;	1276	uint64_t counter;
1163	read (evfd, &counter, sizeof (uint64_t));	1277	read (evfd, &counter, sizeof (uint64_t));
…		…
1167	{	1281	{
1168	char dummy;	1282	char dummy;
1169	read (evpipe [0], &dummy, 1);	1283	read (evpipe [0], &dummy, 1);
1170	}	1284	}
1171		1285
1172	if (gotsig && ev_is_default_loop (EV_A))	1286	if (sig_pending)
1173	{	1287	{
1174	int signum;	1288	sig_pending = 0;
1175	gotsig = 0;
1176		1289
1177	for (signum = signalmax; signum--; )	1290	for (i = EV_NSIG - 1; i--; )
1178	if (signals [signum].gotsig)	1291	if (expect_false (signals [i].pending))
1179	ev_feed_signal_event (EV_A_ signum + 1);	1292	ev_feed_signal_event (EV_A_ i + 1);
1180	}	1293	}
1181		1294
1182	#if EV_ASYNC_ENABLE	1295	#if EV_ASYNC_ENABLE
1183	if (gotasync)	1296	if (async_pending)
1184	{	1297	{
1185	int i;	1298	async_pending = 0;
1186	gotasync = 0;
1187		1299
1188	for (i = asynccnt; i--; )	1300	for (i = asynccnt; i--; )
1189	if (asyncs [i]->sent)	1301	if (asyncs [i]->sent)
1190	{	1302	{
1191	asyncs [i]->sent = 0;	1303	asyncs [i]->sent = 0;
…		…
1199		1311
1200	static void	1312	static void
1201	ev_sighandler (int signum)	1313	ev_sighandler (int signum)
1202	{	1314	{
1203	#if EV_MULTIPLICITY	1315	#if EV_MULTIPLICITY
1204	struct ev_loop *loop = &default_loop_struct;	1316	EV_P = signals [signum - 1].loop;
1205	#endif	1317	#endif
1206		1318
1207	#if _WIN32	1319	#ifdef _WIN32
1208	signal (signum, ev_sighandler);	1320	signal (signum, ev_sighandler);
1209	#endif	1321	#endif
1210		1322
1211	signals [signum - 1].gotsig = 1;	1323	signals [signum - 1].pending = 1;
1212	evpipe_write (EV_A_ &gotsig);	1324	evpipe_write (EV_A_ &sig_pending);
1213	}	1325	}
1214		1326
1215	void noinline	1327	void noinline
1216	ev_feed_signal_event (EV_P_ int signum)	1328	ev_feed_signal_event (EV_P_ int signum)
1217	{	1329	{
1218	WL w;	1330	WL w;
1219		1331
		1332	if (expect_false (signum <= 0 \|\| signum > EV_NSIG))
		1333	return;
		1334
		1335	--signum;
		1336
1220	#if EV_MULTIPLICITY	1337	#if EV_MULTIPLICITY
1221	assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));	1338	/* it is permissible to try to feed a signal to the wrong loop */
1222	#endif	1339	/* or, likely more useful, feeding a signal nobody is waiting for */
1223		1340
1224	--signum;	1341	if (expect_false (signals [signum].loop != EV_A))
1225
1226	if (signum < 0 \|\| signum >= signalmax)
1227	return;	1342	return;
		1343	#endif
1228		1344
1229	signals [signum].gotsig = 0;	1345	signals [signum].pending = 0;
1230		1346
1231	for (w = signals [signum].head; w; w = w->next)	1347	for (w = signals [signum].head; w; w = w->next)
1232	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);	1348	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1233	}	1349	}
		1350
		1351	#if EV_USE_SIGNALFD
		1352	static void
		1353	sigfdcb (EV_P_ ev_io *iow, int revents)
		1354	{
		1355	struct signalfd_siginfo si[2], sip; / these structs are big */
		1356
		1357	for (;;)
		1358	{
		1359	ssize_t res = read (sigfd, si, sizeof (si));
		1360
		1361	/* not ISO-C, as res might be -1, but works with SuS */
		1362	for (sip = si; (char )sip < (char )si + res; ++sip)
		1363	ev_feed_signal_event (EV_A_ sip->ssi_signo);
		1364
		1365	if (res < (ssize_t)sizeof (si))
		1366	break;
		1367	}
		1368	}
		1369	#endif
1234		1370
1235	/*****************************************************************************/	1371	/*****************************************************************************/
1236		1372
1237	static WL childs [EV_PID_HASHSIZE];	1373	static WL childs [EV_PID_HASHSIZE];
1238		1374
…		…
1458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1594	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1459	have_monotonic = 1;	1595	have_monotonic = 1;
1460	}	1596	}
1461	#endif	1597	#endif
1462		1598
		1599	/* pid check not overridable via env */
		1600	#ifndef _WIN32
		1601	if (flags & EVFLAG_FORKCHECK)
		1602	curpid = getpid ();
		1603	#endif
		1604
		1605	if (!(flags & EVFLAG_NOENV)
		1606	&& !enable_secure ()
		1607	&& getenv ("LIBEV_FLAGS"))
		1608	flags = atoi (getenv ("LIBEV_FLAGS"));
		1609
1463	ev_rt_now = ev_time ();	1610	ev_rt_now = ev_time ();
1464	mn_now = get_clock ();	1611	mn_now = get_clock ();
1465	now_floor = mn_now;	1612	now_floor = mn_now;
1466	rtmn_diff = ev_rt_now - mn_now;	1613	rtmn_diff = ev_rt_now - mn_now;
1467	#if EV_MINIMAL < 2	1614	#if EV_MINIMAL < 2
…		…
1470		1617
1471	io_blocktime = 0.;	1618	io_blocktime = 0.;
1472	timeout_blocktime = 0.;	1619	timeout_blocktime = 0.;
1473	backend = 0;	1620	backend = 0;
1474	backend_fd = -1;	1621	backend_fd = -1;
1475	gotasync = 0;	1622	sig_pending = 0;
		1623	#if EV_ASYNC_ENABLE
		1624	async_pending = 0;
		1625	#endif
1476	#if EV_USE_INOTIFY	1626	#if EV_USE_INOTIFY
1477	fs_fd = -2;	1627	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1478	#endif	1628	#endif
1479		1629	#if EV_USE_SIGNALFD
1480	/* pid check not overridable via env */	1630	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1481	#ifndef _WIN32
1482	if (flags & EVFLAG_FORKCHECK)
1483	curpid = getpid ();
1484	#endif	1631	#endif
1485
1486	if (!(flags & EVFLAG_NOENV)
1487	&& !enable_secure ()
1488	&& getenv ("LIBEV_FLAGS"))
1489	flags = atoi (getenv ("LIBEV_FLAGS"));
1490		1632
1491	if (!(flags & 0x0000ffffU))	1633	if (!(flags & 0x0000ffffU))
1492	flags \|= ev_recommended_backends ();	1634	flags \|= ev_recommended_backends ();
1493		1635
1494	#if EV_USE_PORT	1636	#if EV_USE_PORT
…		…
1520	{	1662	{
1521	int i;	1663	int i;
1522		1664
1523	if (ev_is_active (&pipe_w))	1665	if (ev_is_active (&pipe_w))
1524	{	1666	{
1525	ev_ref (EV_A); /* signal watcher */	1667	/ev_ref (EV_A);/
1526	ev_io_stop (EV_A_ &pipe_w);	1668	/ev_io_stop (EV_A_ &pipe_w);/
1527		1669
1528	#if EV_USE_EVENTFD	1670	#if EV_USE_EVENTFD
1529	if (evfd >= 0)	1671	if (evfd >= 0)
1530	close (evfd);	1672	close (evfd);
1531	#endif	1673	#endif
1532		1674
1533	if (evpipe [0] >= 0)	1675	if (evpipe [0] >= 0)
1534	{	1676	{
1535	close (evpipe [0]);	1677	EV_WIN32_CLOSE_FD (evpipe [0]);
1536	close (evpipe [1]);	1678	EV_WIN32_CLOSE_FD (evpipe [1]);
1537	}	1679	}
1538	}	1680	}
		1681
		1682	#if EV_USE_SIGNALFD
		1683	if (ev_is_active (&sigfd_w))
		1684	close (sigfd);
		1685	#endif
1539		1686
1540	#if EV_USE_INOTIFY	1687	#if EV_USE_INOTIFY
1541	if (fs_fd >= 0)	1688	if (fs_fd >= 0)
1542	close (fs_fd);	1689	close (fs_fd);
1543	#endif	1690	#endif
…		…
1567	#if EV_IDLE_ENABLE	1714	#if EV_IDLE_ENABLE
1568	array_free (idle, [i]);	1715	array_free (idle, [i]);
1569	#endif	1716	#endif
1570	}	1717	}
1571		1718
1572	ev_free (anfds); anfdmax = 0;	1719	ev_free (anfds); anfds = 0; anfdmax = 0;
1573		1720
1574	/* have to use the microsoft-never-gets-it-right macro */	1721	/* have to use the microsoft-never-gets-it-right macro */
1575	array_free (rfeed, EMPTY);	1722	array_free (rfeed, EMPTY);
1576	array_free (fdchange, EMPTY);	1723	array_free (fdchange, EMPTY);
1577	array_free (timer, EMPTY);	1724	array_free (timer, EMPTY);
…		…
1612		1759
1613	if (ev_is_active (&pipe_w))	1760	if (ev_is_active (&pipe_w))
1614	{	1761	{
1615	/* this "locks" the handlers against writing to the pipe */	1762	/* this "locks" the handlers against writing to the pipe */
1616	/* while we modify the fd vars */	1763	/* while we modify the fd vars */
1617	gotsig = 1;	1764	sig_pending = 1;
1618	#if EV_ASYNC_ENABLE	1765	#if EV_ASYNC_ENABLE
1619	gotasync = 1;	1766	async_pending = 1;
1620	#endif	1767	#endif
1621		1768
1622	ev_ref (EV_A);	1769	ev_ref (EV_A);
1623	ev_io_stop (EV_A_ &pipe_w);	1770	ev_io_stop (EV_A_ &pipe_w);
1624		1771
…		…
1627	close (evfd);	1774	close (evfd);
1628	#endif	1775	#endif
1629		1776
1630	if (evpipe [0] >= 0)	1777	if (evpipe [0] >= 0)
1631	{	1778	{
1632	close (evpipe [0]);	1779	EV_WIN32_CLOSE_FD (evpipe [0]);
1633	close (evpipe [1]);	1780	EV_WIN32_CLOSE_FD (evpipe [1]);
1634	}	1781	}
1635		1782
1636	evpipe_init (EV_A);	1783	evpipe_init (EV_A);
1637	/* now iterate over everything, in case we missed something */	1784	/* now iterate over everything, in case we missed something */
1638	pipecb (EV_A_ &pipe_w, EV_READ);	1785	pipecb (EV_A_ &pipe_w, EV_READ);
…		…
1644	#if EV_MULTIPLICITY	1791	#if EV_MULTIPLICITY
1645		1792
1646	struct ev_loop *	1793	struct ev_loop *
1647	ev_loop_new (unsigned int flags)	1794	ev_loop_new (unsigned int flags)
1648	{	1795	{
1649	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));	1796	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1650		1797
1651	memset (loop, 0, sizeof (struct ev_loop));	1798	memset (EV_A, 0, sizeof (struct ev_loop));
1652
1653	loop_init (EV_A_ flags);	1799	loop_init (EV_A_ flags);
1654		1800
1655	if (ev_backend (EV_A))	1801	if (ev_backend (EV_A))
1656	return loop;	1802	return EV_A;
1657		1803
1658	return 0;	1804	return 0;
1659	}	1805	}
1660		1806
1661	void	1807	void
…		…
1765	assert (checkmax >= checkcnt);	1911	assert (checkmax >= checkcnt);
1766	array_verify (EV_A_ (W *)checks, checkcnt);	1912	array_verify (EV_A_ (W *)checks, checkcnt);
1767		1913
1768	# if 0	1914	# if 0
1769	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1915	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)	1916	for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1771	# endif	1917	# endif
1772	#endif	1918	#endif
1773	}	1919	}
1774	#endif	1920	#endif
1775		1921
…		…
1782	#endif	1928	#endif
1783	{	1929	{
1784	if (!ev_default_loop_ptr)	1930	if (!ev_default_loop_ptr)
1785	{	1931	{
1786	#if EV_MULTIPLICITY	1932	#if EV_MULTIPLICITY
1787	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1933	EV_P = ev_default_loop_ptr = &default_loop_struct;
1788	#else	1934	#else
1789	ev_default_loop_ptr = 1;	1935	ev_default_loop_ptr = 1;
1790	#endif	1936	#endif
1791		1937
1792	loop_init (EV_A_ flags);	1938	loop_init (EV_A_ flags);
…		…
1809		1955
1810	void	1956	void
1811	ev_default_destroy (void)	1957	ev_default_destroy (void)
1812	{	1958	{
1813	#if EV_MULTIPLICITY	1959	#if EV_MULTIPLICITY
1814	struct ev_loop *loop = ev_default_loop_ptr;	1960	EV_P = ev_default_loop_ptr;
1815	#endif	1961	#endif
1816		1962
1817	ev_default_loop_ptr = 0;	1963	ev_default_loop_ptr = 0;
1818		1964
1819	#ifndef _WIN32	1965	#ifndef _WIN32
…		…
1826		1972
1827	void	1973	void
1828	ev_default_fork (void)	1974	ev_default_fork (void)
1829	{	1975	{
1830	#if EV_MULTIPLICITY	1976	#if EV_MULTIPLICITY
1831	struct ev_loop *loop = ev_default_loop_ptr;	1977	EV_P = ev_default_loop_ptr;
1832	#endif	1978	#endif
1833		1979
1834	postfork = 1; /* must be in line with ev_loop_fork */	1980	postfork = 1; /* must be in line with ev_loop_fork */
1835	}	1981	}
1836		1982
…		…
2031	ANHE_at_cache (*he);	2177	ANHE_at_cache (*he);
2032	}	2178	}
2033	}	2179	}
2034		2180
2035	/* fetch new monotonic and realtime times from the kernel */	2181	/* fetch new monotonic and realtime times from the kernel */
2036	/* also detetc if there was a timejump, and act accordingly */	2182	/* also detect if there was a timejump, and act accordingly */
2037	inline_speed void	2183	inline_speed void
2038	time_update (EV_P_ ev_tstamp max_block)	2184	time_update (EV_P_ ev_tstamp max_block)
2039	{	2185	{
2040	#if EV_USE_MONOTONIC	2186	#if EV_USE_MONOTONIC
2041	if (expect_true (have_monotonic))	2187	if (expect_true (have_monotonic))
…		…
2302	inline_size void	2448	inline_size void
2303	wlist_del (WL *head, WL elem)	2449	wlist_del (WL *head, WL elem)
2304	{	2450	{
2305	while (*head)	2451	while (*head)
2306	{	2452	{
2307	if (*head == elem)	2453	if (expect_true (*head == elem))
2308	{	2454	{
2309	*head = elem->next;	2455	*head = elem->next;
2310	return;	2456	break;
2311	}	2457	}
2312		2458
2313	head = &(*head)->next;	2459	head = &(*head)->next;
2314	}	2460	}
2315	}	2461	}
…		…
2375		2521
2376	if (expect_false (ev_is_active (w)))	2522	if (expect_false (ev_is_active (w)))
2377	return;	2523	return;
2378		2524
2379	assert (("libev: ev_io_start called with negative fd", fd >= 0));	2525	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))));	2526	assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET \| EV_READ \| EV_WRITE))));
2381		2527
2382	EV_FREQUENT_CHECK;	2528	EV_FREQUENT_CHECK;
2383		2529
2384	ev_start (EV_A_ (W)w, 1);	2530	ev_start (EV_A_ (W)w, 1);
2385	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);	2531	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
…		…
2455	timers [active] = timers [timercnt + HEAP0];	2601	timers [active] = timers [timercnt + HEAP0];
2456	adjustheap (timers, timercnt, active);	2602	adjustheap (timers, timercnt, active);
2457	}	2603	}
2458	}	2604	}
2459		2605
2460	EV_FREQUENT_CHECK;
2461
2462	ev_at (w) -= mn_now;	2606	ev_at (w) -= mn_now;
2463		2607
2464	ev_stop (EV_A_ (W)w);	2608	ev_stop (EV_A_ (W)w);
		2609
		2610	EV_FREQUENT_CHECK;
2465	}	2611	}
2466		2612
2467	void noinline	2613	void noinline
2468	ev_timer_again (EV_P_ ev_timer *w)	2614	ev_timer_again (EV_P_ ev_timer *w)
2469	{	2615	{
…		…
2548	periodics [active] = periodics [periodiccnt + HEAP0];	2694	periodics [active] = periodics [periodiccnt + HEAP0];
2549	adjustheap (periodics, periodiccnt, active);	2695	adjustheap (periodics, periodiccnt, active);
2550	}	2696	}
2551	}	2697	}
2552		2698
2553	EV_FREQUENT_CHECK;
2554
2555	ev_stop (EV_A_ (W)w);	2699	ev_stop (EV_A_ (W)w);
		2700
		2701	EV_FREQUENT_CHECK;
2556	}	2702	}
2557		2703
2558	void noinline	2704	void noinline
2559	ev_periodic_again (EV_P_ ev_periodic *w)	2705	ev_periodic_again (EV_P_ ev_periodic *w)
2560	{	2706	{
…		…
2569	#endif	2715	#endif
2570		2716
2571	void noinline	2717	void noinline
2572	ev_signal_start (EV_P_ ev_signal *w)	2718	ev_signal_start (EV_P_ ev_signal *w)
2573	{	2719	{
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)))	2720	if (expect_false (ev_is_active (w)))
2578	return;	2721	return;
2579		2722
2580	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));	2723	assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2581		2724
2582	evpipe_init (EV_A);	2725	#if EV_MULTIPLICITY
		2726	assert (("libev: a signal must not be attached to two different loops",
		2727	!signals [w->signum - 1].loop \|\| signals [w->signum - 1].loop == loop));
2583		2728
2584	EV_FREQUENT_CHECK;	2729	signals [w->signum - 1].loop = EV_A;
		2730	#endif
2585		2731
		2732	EV_FREQUENT_CHECK;
		2733
		2734	#if EV_USE_SIGNALFD
		2735	if (sigfd == -2)
2586	{	2736	{
2587	#ifndef _WIN32	2737	sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK \| SFD_CLOEXEC);
2588	sigset_t full, prev;	2738	if (sigfd < 0 && errno == EINVAL)
2589	sigfillset (&full);	2739	sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2590	sigprocmask (SIG_SETMASK, &full, &prev);
2591	#endif
2592		2740
2593	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);	2741	if (sigfd >= 0)
		2742	{
		2743	fd_intern (sigfd); /* doing it twice will not hurt */
2594		2744
2595	#ifndef _WIN32	2745	sigemptyset (&sigfd_set);
2596	sigprocmask (SIG_SETMASK, &prev, 0);	2746
2597	#endif	2747	ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
		2748	ev_set_priority (&sigfd_w, EV_MAXPRI);
		2749	ev_io_start (EV_A_ &sigfd_w);
		2750	ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
		2751	}
2598	}	2752	}
		2753
		2754	if (sigfd >= 0)
		2755	{
		2756	/* TODO: check .head */
		2757	sigaddset (&sigfd_set, w->signum);
		2758	sigprocmask (SIG_BLOCK, &sigfd_set, 0);
		2759
		2760	signalfd (sigfd, &sigfd_set, 0);
		2761	}
		2762	#endif
2599		2763
2600	ev_start (EV_A_ (W)w, 1);	2764	ev_start (EV_A_ (W)w, 1);
2601	wlist_add (&signals [w->signum - 1].head, (WL)w);	2765	wlist_add (&signals [w->signum - 1].head, (WL)w);
2602		2766
2603	if (!((WL)w)->next)	2767	if (!((WL)w)->next)
		2768	# if EV_USE_SIGNALFD
		2769	if (sigfd < 0) /TODO/
		2770	# endif
2604	{	2771	{
2605	#if _WIN32	2772	# ifdef _WIN32
		2773	evpipe_init (EV_A);
		2774
2606	signal (w->signum, ev_sighandler);	2775	signal (w->signum, ev_sighandler);
2607	#else	2776	# else
2608	struct sigaction sa = { };	2777	struct sigaction sa;
		2778
		2779	evpipe_init (EV_A);
		2780
2609	sa.sa_handler = ev_sighandler;	2781	sa.sa_handler = ev_sighandler;
2610	sigfillset (&sa.sa_mask);	2782	sigfillset (&sa.sa_mask);
2611	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2783	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2612	sigaction (w->signum, &sa, 0);	2784	sigaction (w->signum, &sa, 0);
		2785
		2786	sigemptyset (&sa.sa_mask);
		2787	sigaddset (&sa.sa_mask, w->signum);
		2788	sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2613	#endif	2789	#endif
2614	}	2790	}
2615		2791
2616	EV_FREQUENT_CHECK;	2792	EV_FREQUENT_CHECK;
2617	}	2793	}
2618		2794
2619	void noinline	2795	void noinline
…		…
2627		2803
2628	wlist_del (&signals [w->signum - 1].head, (WL)w);	2804	wlist_del (&signals [w->signum - 1].head, (WL)w);
2629	ev_stop (EV_A_ (W)w);	2805	ev_stop (EV_A_ (W)w);
2630		2806
2631	if (!signals [w->signum - 1].head)	2807	if (!signals [w->signum - 1].head)
		2808	{
		2809	#if EV_MULTIPLICITY
		2810	signals [w->signum - 1].loop = 0; /* unattach from signal */
		2811	#endif
		2812	#if EV_USE_SIGNALFD
		2813	if (sigfd >= 0)
		2814	{
		2815	sigset_t ss;
		2816
		2817	sigemptyset (&ss);
		2818	sigaddset (&ss, w->signum);
		2819	sigdelset (&sigfd_set, w->signum);
		2820
		2821	signalfd (sigfd, &sigfd_set, 0);
		2822	sigprocmask (SIG_UNBLOCK, &ss, 0);
		2823	}
		2824	else
		2825	#endif
2632	signal (w->signum, SIG_DFL);	2826	signal (w->signum, SIG_DFL);
		2827	}
2633		2828
2634	EV_FREQUENT_CHECK;	2829	EV_FREQUENT_CHECK;
2635	}	2830	}
2636		2831
2637	void	2832	void
…		…
2678	#define MIN_STAT_INTERVAL 0.1074891	2873	#define MIN_STAT_INTERVAL 0.1074891
2679		2874
2680	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);	2875	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2681		2876
2682	#if EV_USE_INOTIFY	2877	#if EV_USE_INOTIFY
2683	# define EV_INOTIFY_BUFSIZE 8192	2878
		2879	/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
		2880	# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2684		2881
2685	static void noinline	2882	static void noinline
2686	infy_add (EV_P_ ev_stat *w)	2883	infy_add (EV_P_ ev_stat *w)
2687	{	2884	{
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);	2885	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		2886
2690	if (w->wd < 0)	2887	if (w->wd >= 0)
		2888	{
		2889	struct statfs sfs;
		2890
		2891	/* now local changes will be tracked by inotify, but remote changes won't */
		2892	/* unless the filesystem is known to be local, we therefore still poll */
		2893	/* also do poll on <2.6.25, but with normal frequency */
		2894
		2895	if (!fs_2625)
		2896	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		2897	else if (!statfs (w->path, &sfs)
		2898	&& (sfs.f_type == 0x1373 /* devfs */
		2899	\|\| sfs.f_type == 0xEF53 /* ext2/3 */
		2900	\|\| sfs.f_type == 0x3153464a /* jfs */
		2901	\|\| sfs.f_type == 0x52654973 /* reiser3 */
		2902	\|\| sfs.f_type == 0x01021994 /* tempfs */
		2903	\|\| sfs.f_type == 0x58465342 /* xfs */))
		2904	w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
		2905	else
		2906	w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2691	{	2907	}
		2908	else
		2909	{
		2910	/* can't use inotify, continue to stat */
2692	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;	2911	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		2912
2695	/* monitor some parent directory for speedup hints */	2913	/* 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, */	2914	/* note that exceeding the hardcoded path limit is not a correctness issue, */
2697	/* but an efficiency issue only */	2915	/* but an efficiency issue only */
2698	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2916	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
2699	{	2917	{
2700	char path [4096];	2918	char path [4096];
…		…
2716	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));	2934	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
2717	}	2935	}
2718	}	2936	}
2719		2937
2720	if (w->wd >= 0)	2938	if (w->wd >= 0)
2721	{
2722	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);	2939	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2723		2940
2724	/* now local changes will be tracked by inotify, but remote changes won't */	2941	/* now re-arm timer, if required */
2725	/* unless the filesystem it known to be local, we therefore still poll */	2942	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);	2943	ev_timer_again (EV_A_ &w->timer);
2740	}	2944	if (ev_is_active (&w->timer)) ev_unref (EV_A);
2741	}	2945	}
2742		2946
2743	static void noinline	2947	static void noinline
2744	infy_del (EV_P_ ev_stat *w)	2948	infy_del (EV_P_ ev_stat *w)
2745	{	2949	{
…		…
2790		2994
2791	static void	2995	static void
2792	infy_cb (EV_P_ ev_io *w, int revents)	2996	infy_cb (EV_P_ ev_io *w, int revents)
2793	{	2997	{
2794	char buf [EV_INOTIFY_BUFSIZE];	2998	char buf [EV_INOTIFY_BUFSIZE];
2795	struct inotify_event ev = (struct inotify_event )buf;
2796	int ofs;	2999	int ofs;
2797	int len = read (fs_fd, buf, sizeof (buf));	3000	int len = read (fs_fd, buf, sizeof (buf));
2798		3001
2799	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)	3002	for (ofs = 0; ofs < len; )
		3003	{
		3004	struct inotify_event ev = (struct inotify_event )(buf + ofs);
2800	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3005	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		3006	ofs += sizeof (struct inotify_event) + ev->len;
		3007	}
		3008	}
		3009
		3010	inline_size unsigned int
		3011	ev_linux_version (void)
		3012	{
		3013	struct utsname buf;
		3014	unsigned int v;
		3015	int i;
		3016	char *p = buf.release;
		3017
		3018	if (uname (&buf))
		3019	return 0;
		3020
		3021	for (i = 3+1; --i; )
		3022	{
		3023	unsigned int c = 0;
		3024
		3025	for (;;)
		3026	{
		3027	if (p >= '0' && p <= '9')
		3028	c = c * 10 + *p++ - '0';
		3029	else
		3030	{
		3031	p += *p == '.';
		3032	break;
		3033	}
		3034	}
		3035
		3036	v = (v << 8) \| c;
		3037	}
		3038
		3039	return v;
2801	}	3040	}
2802		3041
2803	inline_size void	3042	inline_size void
2804	check_2625 (EV_P)	3043	ev_check_2625 (EV_P)
2805	{	3044	{
2806	/* kernels < 2.6.25 are borked	3045	/* kernels < 2.6.25 are borked
2807	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3046	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2808	*/	3047	*/
2809	struct utsname buf;	3048	if (ev_linux_version () < 0x020619)
2810	int major, minor, micro;
2811
2812	if (uname (&buf))
2813	return;	3049	return;
2814		3050
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;	3051	fs_2625 = 1;
		3052	}
		3053
		3054	inline_size int
		3055	infy_newfd (void)
		3056	{
		3057	#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
		3058	int fd = inotify_init1 (IN_CLOEXEC \| IN_NONBLOCK);
		3059	if (fd >= 0)
		3060	return fd;
		3061	#endif
		3062	return inotify_init ();
2824	}	3063	}
2825		3064
2826	inline_size void	3065	inline_size void
2827	infy_init (EV_P)	3066	infy_init (EV_P)
2828	{	3067	{
2829	if (fs_fd != -2)	3068	if (fs_fd != -2)
2830	return;	3069	return;
2831		3070
2832	fs_fd = -1;	3071	fs_fd = -1;
2833		3072
2834	check_2625 (EV_A);	3073	ev_check_2625 (EV_A);
2835		3074
2836	fs_fd = inotify_init ();	3075	fs_fd = infy_newfd ();
2837		3076
2838	if (fs_fd >= 0)	3077	if (fs_fd >= 0)
2839	{	3078	{
		3079	fd_intern (fs_fd);
2840	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);	3080	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2841	ev_set_priority (&fs_w, EV_MAXPRI);	3081	ev_set_priority (&fs_w, EV_MAXPRI);
2842	ev_io_start (EV_A_ &fs_w);	3082	ev_io_start (EV_A_ &fs_w);
		3083	ev_unref (EV_A);
2843	}	3084	}
2844	}	3085	}
2845		3086
2846	inline_size void	3087	inline_size void
2847	infy_fork (EV_P)	3088	infy_fork (EV_P)
…		…
2849	int slot;	3090	int slot;
2850		3091
2851	if (fs_fd < 0)	3092	if (fs_fd < 0)
2852	return;	3093	return;
2853		3094
		3095	ev_ref (EV_A);
		3096	ev_io_stop (EV_A_ &fs_w);
2854	close (fs_fd);	3097	close (fs_fd);
2855	fs_fd = inotify_init ();	3098	fs_fd = infy_newfd ();
		3099
		3100	if (fs_fd >= 0)
		3101	{
		3102	fd_intern (fs_fd);
		3103	ev_io_set (&fs_w, fs_fd, EV_READ);
		3104	ev_io_start (EV_A_ &fs_w);
		3105	ev_unref (EV_A);
		3106	}
2856		3107
2857	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)	3108	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2858	{	3109	{
2859	WL w_ = fs_hash [slot].head;	3110	WL w_ = fs_hash [slot].head;
2860	fs_hash [slot].head = 0;	3111	fs_hash [slot].head = 0;
…		…
2867	w->wd = -1;	3118	w->wd = -1;
2868		3119
2869	if (fs_fd >= 0)	3120	if (fs_fd >= 0)
2870	infy_add (EV_A_ w); /* re-add, no matter what */	3121	infy_add (EV_A_ w); /* re-add, no matter what */
2871	else	3122	else
		3123	{
		3124	w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
		3125	if (ev_is_active (&w->timer)) ev_ref (EV_A);
2872	ev_timer_again (EV_A_ &w->timer);	3126	ev_timer_again (EV_A_ &w->timer);
		3127	if (ev_is_active (&w->timer)) ev_unref (EV_A);
		3128	}
2873	}	3129	}
2874	}	3130	}
2875	}	3131	}
2876		3132
2877	#endif	3133	#endif
…		…
2894	static void noinline	3150	static void noinline
2895	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	3151	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2896	{	3152	{
2897	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));	3153	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
2898		3154
2899	/* we copy this here each the time so that */	3155	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);	3156	ev_stat_stat (EV_A_ w);
2903		3157
2904	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */	3158	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2905	if (	3159	if (
2906	w->prev.st_dev != w->attr.st_dev	3160	prev.st_dev != w->attr.st_dev
2907	\|\| w->prev.st_ino != w->attr.st_ino	3161	\|\| prev.st_ino != w->attr.st_ino
2908	\|\| w->prev.st_mode != w->attr.st_mode	3162	\|\| prev.st_mode != w->attr.st_mode
2909	\|\| w->prev.st_nlink != w->attr.st_nlink	3163	\|\| prev.st_nlink != w->attr.st_nlink
2910	\|\| w->prev.st_uid != w->attr.st_uid	3164	\|\| prev.st_uid != w->attr.st_uid
2911	\|\| w->prev.st_gid != w->attr.st_gid	3165	\|\| prev.st_gid != w->attr.st_gid
2912	\|\| w->prev.st_rdev != w->attr.st_rdev	3166	\|\| prev.st_rdev != w->attr.st_rdev
2913	\|\| w->prev.st_size != w->attr.st_size	3167	\|\| prev.st_size != w->attr.st_size
2914	\|\| w->prev.st_atime != w->attr.st_atime	3168	\|\| prev.st_atime != w->attr.st_atime
2915	\|\| w->prev.st_mtime != w->attr.st_mtime	3169	\|\| prev.st_mtime != w->attr.st_mtime
2916	\|\| w->prev.st_ctime != w->attr.st_ctime	3170	\|\| prev.st_ctime != w->attr.st_ctime
2917	) {	3171	) {
		3172	/* we only update w->prev on actual differences */
		3173	/* in case we test more often than invoke the callback, */
		3174	/* to ensure that prev is always different to attr */
		3175	w->prev = prev;
		3176
2918	#if EV_USE_INOTIFY	3177	#if EV_USE_INOTIFY
2919	if (fs_fd >= 0)	3178	if (fs_fd >= 0)
2920	{	3179	{
2921	infy_del (EV_A_ w);	3180	infy_del (EV_A_ w);
2922	infy_add (EV_A_ w);	3181	infy_add (EV_A_ w);
…		…
2947		3206
2948	if (fs_fd >= 0)	3207	if (fs_fd >= 0)
2949	infy_add (EV_A_ w);	3208	infy_add (EV_A_ w);
2950	else	3209	else
2951	#endif	3210	#endif
		3211	{
2952	ev_timer_again (EV_A_ &w->timer);	3212	ev_timer_again (EV_A_ &w->timer);
		3213	ev_unref (EV_A);
		3214	}
2953		3215
2954	ev_start (EV_A_ (W)w, 1);	3216	ev_start (EV_A_ (W)w, 1);
2955		3217
2956	EV_FREQUENT_CHECK;	3218	EV_FREQUENT_CHECK;
2957	}	3219	}
…		…
2966	EV_FREQUENT_CHECK;	3228	EV_FREQUENT_CHECK;
2967		3229
2968	#if EV_USE_INOTIFY	3230	#if EV_USE_INOTIFY
2969	infy_del (EV_A_ w);	3231	infy_del (EV_A_ w);
2970	#endif	3232	#endif
		3233
		3234	if (ev_is_active (&w->timer))
		3235	{
		3236	ev_ref (EV_A);
2971	ev_timer_stop (EV_A_ &w->timer);	3237	ev_timer_stop (EV_A_ &w->timer);
		3238	}
2972		3239
2973	ev_stop (EV_A_ (W)w);	3240	ev_stop (EV_A_ (W)w);
2974		3241
2975	EV_FREQUENT_CHECK;	3242	EV_FREQUENT_CHECK;
2976	}	3243	}
…		…
3117	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)	3384	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3118	{	3385	{
3119	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));	3386	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
3120		3387
3121	{	3388	{
3122	struct ev_loop *loop = w->other;	3389	EV_P = w->other;
3123		3390
3124	while (fdchangecnt)	3391	while (fdchangecnt)
3125	{	3392	{
3126	fd_reify (EV_A);	3393	fd_reify (EV_A);
3127	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3394	ev_loop (EV_A_ EVLOOP_NONBLOCK);
…		…
3135	ev_embed w = (ev_embed )(((char *)fork_w) - offsetof (ev_embed, fork));	3402	ev_embed w = (ev_embed )(((char *)fork_w) - offsetof (ev_embed, fork));
3136		3403
3137	ev_embed_stop (EV_A_ w);	3404	ev_embed_stop (EV_A_ w);
3138		3405
3139	{	3406	{
3140	struct ev_loop *loop = w->other;	3407	EV_P = w->other;
3141		3408
3142	ev_loop_fork (EV_A);	3409	ev_loop_fork (EV_A);
3143	ev_loop (EV_A_ EVLOOP_NONBLOCK);	3410	ev_loop (EV_A_ EVLOOP_NONBLOCK);
3144	}	3411	}
3145		3412
…		…
3159	{	3426	{
3160	if (expect_false (ev_is_active (w)))	3427	if (expect_false (ev_is_active (w)))
3161	return;	3428	return;
3162		3429
3163	{	3430	{
3164	struct ev_loop *loop = w->other;	3431	EV_P = w->other;
3165	assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	3432	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);	3433	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3167	}	3434	}
3168		3435
3169	EV_FREQUENT_CHECK;	3436	EV_FREQUENT_CHECK;
…		…
3196		3463
3197	ev_io_stop (EV_A_ &w->io);	3464	ev_io_stop (EV_A_ &w->io);
3198	ev_prepare_stop (EV_A_ &w->prepare);	3465	ev_prepare_stop (EV_A_ &w->prepare);
3199	ev_fork_stop (EV_A_ &w->fork);	3466	ev_fork_stop (EV_A_ &w->fork);
3200		3467
		3468	ev_stop (EV_A_ (W)w);
		3469
3201	EV_FREQUENT_CHECK;	3470	EV_FREQUENT_CHECK;
3202	}	3471	}
3203	#endif	3472	#endif
3204		3473
3205	#if EV_FORK_ENABLE	3474	#if EV_FORK_ENABLE
…		…
3281		3550
3282	void	3551	void
3283	ev_async_send (EV_P_ ev_async *w)	3552	ev_async_send (EV_P_ ev_async *w)
3284	{	3553	{
3285	w->sent = 1;	3554	w->sent = 1;
3286	evpipe_write (EV_A_ &gotasync);	3555	evpipe_write (EV_A_ &async_pending);
3287	}	3556	}
3288	#endif	3557	#endif
3289		3558
3290	/*****************************************************************************/	3559	/*****************************************************************************/
3291		3560
…		…
3440	if (types & EV_CHECK)	3709	if (types & EV_CHECK)
3441	for (i = checkcnt; i--; )	3710	for (i = checkcnt; i--; )
3442	cb (EV_A_ EV_CHECK, checks [i]);	3711	cb (EV_A_ EV_CHECK, checks [i]);
3443		3712
3444	if (types & EV_SIGNAL)	3713	if (types & EV_SIGNAL)
3445	for (i = 0; i < signalmax; ++i)	3714	for (i = 0; i < EV_NSIG - 1; ++i)
3446	for (wl = signals [i].head; wl; )	3715	for (wl = signals [i].head; wl; )
3447	{	3716	{
3448	wn = wl->next;	3717	wn = wl->next;
3449	cb (EV_A_ EV_SIGNAL, wl);	3718	cb (EV_A_ EV_SIGNAL, wl);
3450	wl = wn;	3719	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 1.302 by root, Thu Jul 16 15:08:08 2009 UTC vs. Revision 1.330 by root, Tue Mar 9 08:46:17 2010 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.302 by root, Thu Jul 16 15:08:08 2009 UTC vs.
Revision 1.330 by root, Tue Mar 9 08:46:17 2010 UTC