Name
getc_unlocked, getchar_unlocked, putc_unlocked, putchar_unlocked — nonlocking stdio functions
Synopsis
#include <stdio.h>
int
getc_unlocked( |
FILE *stream); |
int
getchar_unlocked( |
void); |
int
putc_unlocked( |
int c, |
FILE *stream); |
int
putchar_unlocked( |
int c); |
void
clearerr_unlocked( |
FILE *stream); |
int
feof_unlocked( |
FILE *stream); |
int
ferror_unlocked( |
FILE *stream); |
int
fileno_unlocked( |
FILE *stream); |
int
fflush_unlocked( |
FILE *stream); |
int
fgetc_unlocked( |
FILE *stream); |
int
fputc_unlocked( |
int c, |
FILE *stream); |
size_t
fread_unlocked( |
void *restrict ptr, |
| size_t size, | |
| size_t n, | |
FILE *restrict stream); |
size_t
fwrite_unlocked( |
const void *restrict ptr, |
| size_t size, | |
| size_t n, | |
FILE *restrict stream); |
char
*fgets_unlocked( |
char *restrict s, |
| int n, | |
FILE *restrict stream); |
int
fputs_unlocked( |
const char *restrict s, |
FILE *restrict stream); |
#include <wchar.h>
wint_t
getwc_unlocked( |
FILE *stream); |
wint_t
getwchar_unlocked( |
void); |
wint_t
fgetwc_unlocked( |
FILE *stream); |
wint_t
fputwc_unlocked( |
wchar_t wc, |
FILE *stream); |
wint_t
putwc_unlocked( |
wchar_t wc, |
FILE *stream); |
wint_t
putwchar_unlocked( |
wchar_t wc); |
wchar_t
*fgetws_unlocked( |
wchar_t *restrict ws, |
| int n, | |
FILE *restrict stream); |
int
fputws_unlocked( |
const wchar_t *restrict ws, |
FILE *restrict stream); |
![[Note]](../stylesheet/note.png) |
Note | |||||||||||
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DESCRIPTION
Each of these functions has the same behavior as its counterpart without the "_unlocked" suffix, except that they do not use locking (they do not set locks themselves, and do not test for the presence of locks set by others) and hence are thread-unsafe. See flockfile(3).
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
getc_unlocked(), putc_unlocked(), clearerr_unlocked(), fflush_unlocked(), fgetc_unlocked(), fputc_unlocked(), fread_unlocked(), fwrite_unlocked(), fgets_unlocked(), fputs_unlocked(), getwc_unlocked(), fgetwc_unlocked(), fputwc_unlocked(), putwc_unlocked(), fgetws_unlocked(), fputws_unlocked() |
Thread safety | MT-Safe race:stream |
getchar_unlocked(), getwchar_unlocked() |
Thread safety | MT-Unsafe race:stdin |
putchar_unlocked(), putwchar_unlocked() |
Thread safety | MT-Unsafe race:stdout |
feof_unlocked(), ferror_unlocked(), fileno_unlocked() |
Thread safety | MT-Safe |
CONFORMING TO
The four functions getc_unlocked(), getchar_unlocked(), putc_unlocked(), putchar_unlocked() are in POSIX.1-2001 and
POSIX.1-2008.
The nonstandard *_unlocked()
variants occur on a few UNIX systems, and are available in
recent glibc. They should probably not be used.
COLOPHON
This page is part of release 5.11 of the Linux man-pages project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man−pages/.
|
Copyright (C) 2001 Andries Brouwer <aebcwi.nl>. %%%LICENSE_START(VERBATIM) 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. %%%LICENSE_END |