table of contents
unlocked_stdio(3) | Library Functions Manual | unlocked_stdio(3) |
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);
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).
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 |
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¶
2024-05-02 | Linux man-pages 6.9.1 |