Visit The New, Modern Unix Linux Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #509
Difficulty: Medium
Most programming languages allow you to use whitespace characters (space, tab, etc.) in a variable's identifier.
True or False?
Linux & Unix Commands - Search Man Pages

getc_unlocked(3) [redhat man page]

UNLOCKED_STDIO(3)					     Linux Programmer's Manual						 UNLOCKED_STDIO(3)

NAME
*_unlocked - non-locking 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); #define _BSD_SOURCE /* or _SVID_SOURCE or _GNU_SOURCE */ #include <stdio.h> 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 *ptr, size_t size, size_t n, FILE *stream); size_t fwrite_unlocked(const void *ptr, size_t size, size_t n, FILE *stream); #define _GNU_SOURCE #include <stdio.h> char *fgets_unlocked(char *s, int n, FILE *stream); int fputs_unlocked(const char *s, FILE *stream); #define _GNU_SOURCE #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, int n, FILE *stream); int fputws_unlocked(const wchar_t *ws, FILE *stream); DESCRIPTION
Each of these functions has the same behaviour 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). CONFORMING TO
The four functions getc_unlocked(), getchar_unlocked(), putc_unlocked(), putchar_unlocked() are in POSIX.1. The nonstandard *_unlocked() variants occur on a few Unix systems, and are available in recent glibc. They should probably not be used. SEE ALSO
flockfile(3) 2001-10-18 UNLOCKED_STDIO(3)

Check Out this Related Man Page

UNLOCKED_STDIO(3)					     Linux Programmer's Manual						 UNLOCKED_STDIO(3)

NAME
*_unlocked - non-locking 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); #define _BSD_SOURCE /* or _SVID_SOURCE or _GNU_SOURCE */ #include <stdio.h> 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 *ptr, size_t size, size_t n, FILE *stream); size_t fwrite_unlocked(const void *ptr, size_t size, size_t n, FILE *stream); #define _GNU_SOURCE #include <stdio.h> char *fgets_unlocked(char *s, int n, FILE *stream); int fputs_unlocked(const char *s, FILE *stream); #define _GNU_SOURCE #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, int n, FILE *stream); int fputws_unlocked(const wchar_t *ws, FILE *stream); DESCRIPTION
Each of these functions has the same behaviour 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). CONFORMING TO
The four functions getc_unlocked(), getchar_unlocked(), putc_unlocked(), putchar_unlocked() are in POSIX.1. The nonstandard *_unlocked() variants occur on a few Unix systems, and are available in recent glibc. They should probably not be used. SEE ALSO
flockfile(3) 2001-10-18 UNLOCKED_STDIO(3)

Featured Tech Videos