1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
.\" Copyright (C) 2001 Andries Brouwer <aeb@cwi.nl>.
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Japanese Version Copyright (c) 2001 Yuichi SATO
.\" all rights reserved.
.\" Translated Sun Nov 4 14:09:45 2001
.\" by Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.\"WORD: lockcount å
.\"WORD: owner thread ͭԥå
.\"
.TH FLOCKFILE 3 2008-08-29 "" "Linux Programmer's Manual"
.SH ̾
flockfile, ftrylockfile, funlockfile \- ɸ FILE ΥåԤ
.SH
.nf
.B #include <stdio.h>
.sp
.BI "void flockfile(FILE *" filehandle );
.br
.BI "int ftrylockfile(FILE *" filehandle );
.br
.BI "void funlockfile(FILE *" filehandle );
.fi
.sp
.in -4n
glibc εǽޥ
.RB ( feature_test_macros (7)
):
.in
.ad l
.sp
嵭Ƥδؿ:
_POSIX_C_SOURCE\ >=\ 1 || _XOPEN_SOURCE || _BSD_SOURCE ||
_SVID_SOURCE || _POSIX_SOURCE
.ad b
.SH
ɸϴؿϥåɥդǤ롣ϡ
.I FILE
֥ȤФå (lockcount)
(å 0 Ǥʤ) ͭԥå (owner thread)
뤳ȤǼ¸롣
饤֥θƤӽФԤˡɸϴؿ
.I FILE
֥Ȥ¾ΥåɤˤäƥåƤʤ֤ˤʤޤԤ
.I FILE
֥ȤåᤵϤԤ
֥ȤΥå롣
.LP
(: Υåϡ
.BR flock (2)
.BR lockf (3)
ȤäؿԤåȤ̵طǤ롣)
.LP
ΤȤϤ٤ C ץޤˤϸʤʬǹԤ뤬
٤椬Ǥ褤ͳ2ĤĤϡĤΥåɤ
ԤϢưϰ˹Ԥ졢¾ΥåɤϤˤäǤʤ
褤ȤȤǤ⤦ĤϡΨ礭夲뤿ˤ
åΥХإåɤɬפȤȤǤ
.LP
Ū¸뤿ˡ
.I FILE
֥ȤΥåϢưμ¹ԡ
åβåɤŪ˻ؼ뤳ȤǤ롣
ˤꡢ¾ΥåɤϤԤΤɻߤ롣
Τ褦ʤȤԤͳΨθǤʤС
åԤʤСɸϴؿȤȤǤ롣
㤨С
.BR getc (3)
.BR putc (3)
.BR getc_unlocked (3)
.BR putc_unlocked (3)
Ѥ롣
.LP
.BR flockfile ()
ؿϡ\fI*filehandle\fP ¾Υåɤ˥åƤ
֤ˤʤޤԤäΤߤΥåɤ \fI*filehandle\fP Υʤ
ꤷåû롣
.LP
.BR funlockfile ()
ؿϡå롣
.LP
.BR ftrylockfile ()
ؿ
.BR flockfile ()
Υ֥åԤʤ
СǤ롣¾Υåɤ \fI*filehandle\fP åƤ
Ԥ鷺Ǥʤ \fI*filehandle\fP νͭ
åû롣
.SH ֤
.BR ftrylockfile ()
ؿϥå 0 ֤
Ԥ 0 ʳ֤ͤ
.SH 顼
ʤ
.SH
POSIX.1-2001.
.SH
.B _POSIX_THREAD_SAFE_FUNCTIONS
ƤȤˤδؿѤ뤳ȤǤ롣
5.1.1 ʹߤ libc 2.0 ʹߤ glibc ¸ߤ롣
.SH Ϣ
.BR unlocked_stdio (3)
|
