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| 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/fwrite.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/fwrite.c')
| -rw-r--r-- | newlib/libc/stdio/fwrite.c | 51 |
1 files changed, 48 insertions, 3 deletions
diff --git a/newlib/libc/stdio/fwrite.c b/newlib/libc/stdio/fwrite.c index f460ae3..6b3ff90 100644 --- a/newlib/libc/stdio/fwrite.c +++ b/newlib/libc/stdio/fwrite.c @@ -17,22 +17,35 @@ /* FUNCTION -<<fwrite>>---write array elements +<<fwrite>>, <<fwrite_unlocked>>---write array elements INDEX fwrite INDEX + fwrite_unlocked +INDEX _fwrite_r +INDEX + _fwrite_unlocked_r ANSI_SYNOPSIS #include <stdio.h> size_t fwrite(const void *restrict <[buf]>, size_t <[size]>, size_t <[count]>, FILE *restrict <[fp]>); + #define _BSD_SOURCE + #include <stdio.h> + size_t fwrite_unlocked(const void *restrict <[buf]>, size_t <[size]>, + size_t <[count]>, FILE *restrict <[fp]>); + #include <stdio.h> size_t _fwrite_r(struct _reent *<[ptr]>, const void *restrict <[buf]>, size_t <[size]>, size_t <[count]>, FILE *restrict <[fp]>); + #include <stdio.h> + size_t _fwrite_unlocked_r(struct _reent *<[ptr]>, const void *restrict <[buf]>, size_t <[size]>, + size_t <[count]>, FILE *restrict <[fp]>); + TRAD_SYNOPSIS #include <stdio.h> size_t fwrite(<[buf]>, <[size]>, <[count]>, <[fp]>) @@ -41,6 +54,14 @@ TRAD_SYNOPSIS size_t <[count]>; FILE *<[fp]>; + #define _BSD_SOURCE + #include <stdio.h> + size_t fwrite_unlocked(<[buf]>, <[size]>, <[count]>, <[fp]>) + char *<[buf]>; + size_t <[size]>; + size_t <[count]>; + FILE *<[fp]>; + #include <stdio.h> size_t _fwrite_r(<[ptr]>, <[buf]>, <[size]>, <[count]>, <[fp]>) struct _reent *<[ptr]>; @@ -49,6 +70,14 @@ TRAD_SYNOPSIS size_t <[count]>; FILE *<[fp]>; + #include <stdio.h> + size_t _fwrite_unlocked_r(<[ptr]>, <[buf]>, <[size]>, <[count]>, <[fp]>) + struct _reent *<[ptr]>; + char *<[buf]>; + size_t <[size]>; + size_t <[count]>; + FILE *<[fp]>; + DESCRIPTION <<fwrite>> attempts to copy, starting from the memory location <[buf]>, <[count]> elements (each of size <[size]>) into the file or @@ -58,8 +87,17 @@ stream identified by <[fp]>. <<fwrite>> may copy fewer elements than <<fwrite>> also advances the file position indicator (if any) for <[fp]> by the number of @emph{characters} actually written. -<<_fwrite_r>> is simply the reentrant version of <<fwrite>> that -takes an additional reentrant structure argument: <[ptr]>. +<<fwrite_unlocked>> is a non-thread-safe version of <<fwrite>>. +<<fwrite_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 +<<fwrite_unlocked>> is equivalent to <<fwrite>>. + +<<_fwrite_r>> and <<_fwrite_unlocked_r>> are simply reentrant versions of the +above that take an additional reentrant structure argument: <[ptr]>. RETURNS If <<fwrite>> succeeds in writing all the elements you specify, the @@ -70,6 +108,8 @@ the file. PORTABILITY ANSI C requires <<fwrite>>. +<<fwrite_unlocked>> is a BSD extension also provided by GNU libc. + Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, <<lseek>>, <<read>>, <<sbrk>>, <<write>>. */ @@ -89,6 +129,11 @@ static char sccsid[] = "%W% (Berkeley) %G%"; #include "fvwrite.h" #endif +#ifdef __IMPL_UNLOCKED__ +#define _fwrite_r _fwrite_unlocked_r +#define fwrite fwrite_unlocked +#endif + /* * Write `count' objects (each size `size') from memory to the given file. * Return the number of whole objects written. |