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1 | .\" Copyright (C) 2001 Andries Brouwer <aeb@cwi.nl>. |
2 | .\" | |
3 | .\" Permission is granted to make and distribute verbatim copies of this | |
4 | .\" manual provided the copyright notice and this permission notice are | |
5 | .\" preserved on all copies. | |
6 | .\" | |
7 | .\" Permission is granted to copy and distribute modified versions of this | |
8 | .\" manual under the conditions for verbatim copying, provided that the | |
9 | .\" entire resulting derived work is distributed under the terms of a | |
10 | .\" permission notice identical to this one. | |
c13182ef | 11 | .\" |
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12 | .\" Since the Linux kernel and libraries are constantly changing, this |
13 | .\" manual page may be incorrect or out-of-date. The author(s) assume no | |
14 | .\" responsibility for errors or omissions, or for damages resulting from | |
15 | .\" the use of the information contained herein. The author(s) may not | |
16 | .\" have taken the same level of care in the production of this manual, | |
17 | .\" which is licensed free of charge, as they might when working | |
18 | .\" professionally. | |
c13182ef | 19 | .\" |
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20 | .\" Formatted or processed versions of this manual, if unaccompanied by |
21 | .\" the source, must acknowledge the copyright and authors of this work. | |
22 | .\" | |
cc4615cc | 23 | .TH UNLOCKED_STDIO 3 2007-07-26 "" "Linux Programmer's Manual" |
fea681da | 24 | .SH NAME |
69b29c78 | 25 | getc_unlocked, getchar_unlocked, putc_unlocked, |
fd0930d4 | 26 | putchar_unlocked \- non-locking stdio functions |
fea681da MK |
27 | .SH SYNOPSIS |
28 | .nf | |
29 | .B #include <stdio.h> | |
30 | .sp | |
31 | .BI "int getc_unlocked(FILE *" stream ); | |
0daa9e92 | 32 | .B "int getchar_unlocked(void);" |
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33 | .BI "int putc_unlocked(int " c ", FILE *" stream ); |
34 | .BI "int putchar_unlocked(int " c ); | |
35 | .sp | |
cc4615cc | 36 | .BR "#define _BSD_SOURCE" " /* or _SVID_SOURCE */" |
fea681da MK |
37 | .B #include <stdio.h> |
38 | .sp | |
39 | .BI "void clearerr_unlocked(FILE *" stream ); | |
40 | .BI "int feof_unlocked(FILE *" stream ); | |
41 | .BI "int ferror_unlocked(FILE *" stream ); | |
42 | .BI "int fileno_unlocked(FILE *" stream ); | |
43 | .BI "int fflush_unlocked(FILE *" stream ); | |
44 | .BI "int fgetc_unlocked(FILE *" stream ); | |
45 | .BI "int fputc_unlocked(int " c ", FILE *" stream ); | |
46 | .BI "size_t fread_unlocked(void *" ptr ", size_t " size ", size_t " n , | |
b9f02710 | 47 | .BI " FILE *" stream ); |
fea681da | 48 | .BI "size_t fwrite_unlocked(const void *" ptr ", size_t " size ", size_t " n , |
b9f02710 | 49 | .BI " FILE *" stream ); |
fea681da MK |
50 | .sp |
51 | .B #define _GNU_SOURCE | |
52 | .B #include <stdio.h> | |
53 | .sp | |
54 | .BI "char *fgets_unlocked(char *" s ", int " n ", FILE *" stream ); | |
55 | .BI "int fputs_unlocked(const char *" s ", FILE *" stream ); | |
56 | .sp | |
57 | .B #define _GNU_SOURCE | |
58 | .B #include <wchar.h> | |
59 | .sp | |
60 | .BI "wint_t getwc_unlocked(FILE *" stream ); | |
0daa9e92 | 61 | .B "wint_t getwchar_unlocked(void);" |
fea681da MK |
62 | .BI "wint_t fgetwc_unlocked(FILE *" stream ); |
63 | .BI "wint_t fputwc_unlocked(wchar_t " wc ", FILE *" stream ); | |
64 | .BI "wint_t putwc_unlocked(wchar_t " wc ", FILE *" stream ); | |
65 | .BI "wint_t putwchar_unlocked(wchar_t " wc ); | |
66 | .BI "wchar_t *fgetws_unlocked(wchar_t *" ws ", int " n ", FILE *" stream ); | |
67 | .BI "int fputws_unlocked(const wchar_t *" ws ", FILE *" stream ); | |
68 | .fi | |
69 | .SH DESCRIPTION | |
d9bfdb9c | 70 | Each of these functions has the same behavior as its counterpart |
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71 | without the `_unlocked' suffix, except that they do not use locking |
72 | (they do not set locks themselves, and do not test for the presence | |
73 | of locks set by others) and hence are thread-unsafe. | |
74 | See | |
75 | .BR flockfile (3). | |
76 | .SH "CONFORMING TO" | |
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77 | The four functions |
78 | .BR getc_unlocked (), | |
79 | .BR getchar_unlocked (), | |
80 | .BR putc_unlocked (), | |
81 | .BR putchar_unlocked () | |
82 | are in POSIX.1-2001. | |
68e1685c | 83 | |
fea681da | 84 | The nonstandard |
4d52e8f8 | 85 | .BR *_unlocked () |
fea681da | 86 | variants occur on a few Unix systems, and are available in recent glibc. |
68e1685c | 87 | .\" E.g., in HP-UX 10.0. In HP-UX 10.30 they are called obsolescent, and |
fea681da | 88 | .\" moved to a compatibility library. |
68e1685c | 89 | .\" Available in HP-UX 10.0: clearerr_unlocked, fclose_unlocked, |
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90 | .\" feof_unlocked, ferror_unlocked, fflush_unlocked, fgets_unlocked, |
91 | .\" fgetwc_unlocked, fgetws_unlocked, fileno_unlocked, fputs_unlocked, | |
92 | .\" fputwc_unlocked, fputws_unlocked, fread_unlocked, fseek_unlocked, | |
93 | .\" ftell_unlocked, fwrite_unlocked, getc_unlocked, getchar_unlocked, | |
94 | .\" getw_unlocked, getwc_unlocked, getwchar_unlocked, putc_unlocked, | |
95 | .\" putchar_unlocked, puts_unlocked, putws_unlocked, putw_unlocked, | |
96 | .\" putwc_unlocked, putwchar_unlocked, rewind_unlocked, setvbuf_unlocked, | |
97 | .\" ungetc_unlocked, ungetwc_unlocked. | |
98 | They should probably not be used. | |
99 | .SH "SEE ALSO" | |
50e5322c | 100 | .BR flockfile (3), |
d142e38f | 101 | .BR stdio (3), |
a8e7c990 | 102 | .BR feature_test_macros (7) |