Man page - fgetc_unlocked(3)

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Manual

unlocked_stdio

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
ATTRIBUTES
STANDARDS
HISTORY
SEE ALSO

NAME

getc_unlocked, getchar_unlocked, putc_unlocked, putchar_unlocked - nonlocking stdio functions

LIBRARY

Standard C library ( libc , -lc )

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 *_Nullable stream );

int fgetc_unlocked(FILE * stream );
int fputc_unlocked(int c , FILE * stream );

size_t fread_unlocked(void ptr [restrict . size * . n ],
size_t size , size_t n ,
FILE *restrict stream );
size_t fwrite_unlocked(const void ptr [restrict . size * . n ],
size_t size , size_t n ,
FILE *restrict stream );

char *fgets_unlocked(char s [restrict . n ], 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 ws [restrict . n ], int n ,
FILE *restrict stream );
int fputws_unlocked(const wchar_t *restrict ws ,
FILE *restrict stream );

Feature Test Macro Requirements for glibc (see feature_test_macros (7)):

getc_unlocked (), getchar_unlocked (), putc_unlocked (), putchar_unlocked ():
/* glibc >= 2.24: */ _POSIX_C_SOURCE >= 199309L
|| /* glibc <= 2.23: */ _POSIX_C_SOURCE
|| /* glibc <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE

clearerr_unlocked (), feof_unlocked (), ferror_unlocked (), fileno_unlocked (), fflush_unlocked (), fgetc_unlocked (), fputc_unlocked (), fread_unlocked (), fwrite_unlocked ():
/* glibc >= 2.19: */ _DEFAULT_SOURCE
|| /* glibc <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE

fgets_unlocked (), fputs_unlocked (), getwc_unlocked (), getwchar_unlocked (), fgetwc_unlocked (), fputwc_unlocked (), putwchar_unlocked (), fgetws_unlocked (), fputws_unlocked ():
_GNU_SOURCE

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).

Image grohtml-172002-1.png

STANDARDS

getc_unlocked ()
getchar_unlocked ()
putc_unlocked ()
putchar_unlocked ()

POSIX.1-2008.

Others:

None.

HISTORY

getc_unlocked ()
getchar_unlocked ()
putc_unlocked ()
putchar_unlocked ()

POSIX.1-2001.

SEE ALSO

flockfile (3), stdio (3)