diff options
| author | Yaakov Selkowitz <yselkowi@redhat.com> | 2014-12-18 14:55:21 +0000 |
|---|---|---|
| committer | Yaakov Selkowitz <yselkowi@redhat.com> | 2014-12-18 14:55:21 +0000 |
| commit | 968738f9b133c8bda7d5ced178fd92f4445d791c (patch) | |
| tree | 667f72df8e0f4f52a48057450be0c1a4a5bb31b8 /newlib/libc/stdio/getwchar.c | |
| parent | 2a06c6dcc483361d5af4080e33825cb9d0138c82 (diff) | |
| download | newlib-968738f9b133c8bda7d5ced178fd92f4445d791c.zip newlib-968738f9b133c8bda7d5ced178fd92f4445d791c.tar.gz newlib-968738f9b133c8bda7d5ced178fd92f4445d791c.tar.bz2 | |
Implement BSD/GNU unlocked stdio extensions.
* libc/include/stdio.h (clearerr_unlocked, feof_unlocked,
ferror_unlocked, fflush_unlocked, fgetc_unlocked, fgets_unlocked,
fileno_unlocked, fputc_unlocked, fputs_unlocked, fread_unlocked,
fwrite_unlocked): Declare.
* libc/include/wchar.h (fgetwc_unlocked, fgetws_unlocked,
fputwc_unlocked, fputws_unlocked, getwc_unlocked, getwchar_unlocked,
putwc_unlocked, putwchar_unlocked): Declare.
* libc/stdio/Makefile.am (ELIX_4_SOURCES): Add clearerr_u.c,
feof_u.c, ferror_u.c, fflush_u.c, fgetc_u.c, fgets_u.c, fgetwc_u.c,
fgetws_u.c, fileno_u.c, fputc_u.c, fputs_u.c, fputwc_u.c, fputws_u.c,
fread_u.c, fwrite_u.c, getwc_u.c, getwchar_u.c, putwc_u.c, putwchar_u.c.
Add necessary dependencies.
* libc/stdio/Makefile.in: Regenerate.
* libc/stdio/clearerr.c: Document unlocked variant.
* libc/stdio/clearerr_u.c: New file.
* libc/stdio/feof.c: Document unlocked variant.
* libc/stdio/feof_u.c: New file.
* libc/stdio/ferror.c: Document unlocked variant.
* libc/stdio/ferror_u.c: New file.
* libc/stdio/fflush.c: Add __IMPL_UNLOCKED__ overrides.
Document unlocked variants.
* libc/stdio/fflush_u.c: New file.
* libc/stdio/fgetc.c: Document unlocked variants.
* libc/stdio/fgetc_u.c: New file.
* libc/stdio/fgets.c: Add __IMPL_UNLOCKED__ overrides.
Document unlocked variants.
* libc/stdio/fgets_u.c: New file.
* libc/stdio/fgetwc.c: Document unlocked variants.
(__fgetwc): Make non-static.
* libc/stdio/fgetwc_u.c: New file.
* libc/stdio/fgetws.c: Add __IMPL_UNLOCKED__ overrides.
Document unlocked variants.
* libc/stdio/fgetws_u.c: New file.
* libc/stdio/fileno.c: Document unlocked variant.
* libc/stdio/fileno_u.c: New file.
* libc/stdio/fputc.c: Document unlocked variants.
* libc/stdio/fputc_u.c: New file.
* libc/stdio/fputs.c: Add __IMPL_UNLOCKED__ overrides.
Document unlocked variants.
* libc/stdio/fputs_u.c: New file.
* libc/stdio/fputwc.c: Document unlocked variants.
(__fputwc): Make non-static.
* libc/stdio/fputwc_u.c: New file.
* libc/stdio/fputws.c: Add __IMPL_UNLOCKED__ overrides.
Document unlocked variants.
* libc/stdio/fputws_u.c: New file.
* libc/stdio/fread.c: Add __IMPL_UNLOCKED__ overrides.
Document unlocked variants.
* libc/stdio/fread_u.c: New file.
* libc/stdio/fwrite.c: Add __IMPL_UNLOCKED__ overrides.
Document unlocked variants.
* libc/stdio/fwrite_u.c: New file.
* libc/stdio/getwc_u.c: New file.
* libc/stdio/getwchar.c: Document unlocked variants.
* libc/stdio/getwchar_u.c: New file.
* libc/stdio/local.h: Define locking macros as empty ifdef
__IMPL_UNLOCKED__.
(__fgetwc, __fputwc): Declare.
* libc/stdio/putwc_u.c: New file.
* libc/stdio/putwchar.c: Document unlocked variants.
* libc/stdio/putwchar_u.c: New file.
Diffstat (limited to 'newlib/libc/stdio/getwchar.c')
| -rw-r--r-- | newlib/libc/stdio/getwchar.c | 41 |
1 files changed, 37 insertions, 4 deletions
diff --git a/newlib/libc/stdio/getwchar.c b/newlib/libc/stdio/getwchar.c index f559c76..7ab230a 100644 --- a/newlib/libc/stdio/getwchar.c +++ b/newlib/libc/stdio/getwchar.c @@ -26,34 +26,65 @@ /* FUNCTION -<<getwchar>>---read a wide character from standard input +<<getwchar>>, <<getwchar_unlocked>>---read a wide character from standard input INDEX getwchar INDEX + getwchar_unlocked +INDEX _getwchar_r +INDEX + _getwchar_unlocked_r ANSI_SYNOPSIS #include <wchar.h> wint_t getwchar(void); + #define _GNU_SOURCE + #include <wchar.h> + wint_t getwchar_unlocked(void); + + #include <wchar.h> wint_t _getwchar_r(struct _reent *<[reent]>); + #include <wchar.h> + wint_t _getwchar_unlocked_r(struct _reent *<[reent]>); + TRAD_SYNOPSIS #include <wchar.h> wint_t getwchar(); + #define _GNU_SOURCE + #include <wchar.h> + wint_t getwchar_unlocked(); + + #include <wchar.h> wint_t _getwchar_r(<[reent]>) char * <[reent]>; + #include <wchar.h> + wint_t _getwchar_unlocked_r(<[reent]>) + char * <[reent]>; + DESCRIPTION <<getwchar>> function or macro is the wide character equivalent of the <<getchar>> function. You can use <<getwchar>> to get the next wide character from the standard input stream. As a side effect, <<getwchar>> advances the standard input's current position indicator. -The alternate function <<_getwchar_r>> is a reentrant version. The -extra argument <[reent]> is a pointer to a reentrancy structure. +<<getwchar_unlocked>> is a non-thread-safe version of <<getwchar>>. +<<getwchar_unlocked>> may only safely be used within a scope +protected by flockfile() (or ftrylockfile()) and funlockfile(). This +function may safely be used in a multi-threaded program if and only +if they are called while the invoking thread owns the (FILE *) +object, as is the case after a successful call to the flockfile() or +ftrylockfile() functions. If threads are disabled, then +<<getwchar_unlocked>> is equivalent to <<getwchar>>. + +The alternate functions <<_getwchar_r>> and <<_getwchar_unlocked_r>> are +reentrant versions of the above. The extra argument <[reent]> is a pointer to +a reentrancy structure. RETURNS The next wide character cast to <<wint_t>>, unless there is no more @@ -64,7 +95,9 @@ You can distinguish the two situations that cause an <<WEOF>> result by using `<<ferror(stdin)>>' and `<<feof(stdin)>>'. PORTABILITY -C99 +<<getwchar>> is required by C99. + +<<getwchar_unlocked>> is a GNU extension. */ #include <_ansi.h> |