unlocked_stdio(3) - Linux manual page (original) (raw)
unlockedstdio(3) Library Functions Manual unlockedstdio(3)
NAME top
getc_unlocked, getchar_unlocked, putc_unlocked, putchar_unlocked -
nonlocking stdio functionsLIBRARY top
Standard C library (_libc_, _-lc_)SYNOPSIS top
**#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_SOURCEDESCRIPTION top
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)](../man3/flockfile.3.html).ATTRIBUTES top
For an explanation of the terms used in this section, see
[attributes(7)](../man7/attributes.7.html).
┌──────────────────────┬───────────────┬─────────────────────────┐
│ **Interface** │ **Attribute** │ **Value** │
├──────────────────────┼───────────────┼─────────────────────────┤
│ **getc_unlocked**(), │ Thread safety │ MT-Safe race:stream │
│ **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**() │ │ │
├──────────────────────┼───────────────┼─────────────────────────┤
│ **getchar_unlocked**(), │ Thread safety │ MT-Unsafe race:stdin │
│ **getwchar_unlocked**() │ │ │
├──────────────────────┼───────────────┼─────────────────────────┤
│ **putchar_unlocked**(), │ Thread safety │ MT-Unsafe race:stdout │
│ **putwchar_unlocked**() │ │ │
├──────────────────────┼───────────────┼─────────────────────────┤
│ **feof_unlocked**(), │ Thread safety │ MT-Safe │
│ **ferror_unlocked**(), │ │ │
│ **fileno_unlocked**() │ │ │
└──────────────────────┴───────────────┴─────────────────────────┘STANDARDS top
**getc_unlocked**()
**getchar_unlocked**()
**putc_unlocked**()
**putchar_unlocked**()
POSIX.1-2008.
Others:
None.HISTORY top
**getc_unlocked**()
**getchar_unlocked**()
**putc_unlocked**()
**putchar_unlocked**()
POSIX.1-2001.SEE ALSO top
[flockfile(3)](../man3/flockfile.3.html), [stdio(3)](../man3/stdio.3.html)COLOPHON top
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man-pages@man7.orgLinux man-pages 6.10 2024-07-23 unlockedstdio(3)
Pages that refer to this page:ferror(3), fflush(3), fgetc(3), fgetwc(3), fgetws(3), fileno(3), flockfile(3), fputwc(3), fputws(3), fread(3), gets(3), getwchar(3), puts(3), putwchar(3), stdio(3)