diff options
Diffstat (limited to 'newlib/libc/stdio/fflush.c')
| -rw-r--r-- | newlib/libc/stdio/fflush.c | 53 |
1 files changed, 4 insertions, 49 deletions
diff --git a/newlib/libc/stdio/fflush.c b/newlib/libc/stdio/fflush.c index a4e639e72..ea48b0126 100644 --- a/newlib/libc/stdio/fflush.c +++ b/newlib/libc/stdio/fflush.c @@ -17,32 +17,19 @@ /* FUNCTION -<<fflush>>, <<fflush_unlocked>>---flush buffered file output +<<fflush>>---flush buffered file output INDEX fflush INDEX - fflush_unlocked -INDEX _fflush_r -INDEX - _fflush_unlocked_r ANSI_SYNOPSIS #include <stdio.h> int fflush(FILE *<[fp]>); - #define _BSD_SOURCE - #include <stdio.h> - int fflush_unlocked(FILE *<[fp]>); - - #include <stdio.h> int _fflush_r(struct _reent *<[reent]>, FILE *<[fp]>); - #define _BSD_SOURCE - #include <stdio.h> - int _fflush_unlocked_r(struct _reent *<[reent]>, FILE *<[fp]>); - DESCRIPTION The <<stdio>> output functions can buffer output before delivering it to the host system, in order to minimize the overhead of system calls. @@ -58,18 +45,9 @@ descriptor, set the position of the file descriptor to match next unread byte, useful for obeying POSIX semantics when ending a process without consuming all input from the stream. -<<fflush_unlocked>> is a non-thread-safe version of <<fflush>>. -<<fflush_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 -<<fflush_unlocked>> is equivalent to <<fflush>>. - -The alternate functions <<_fflush_r>> and <<_fflush_unlocked_r>> are -reentrant versions, where the extra argument <[reent]> is a pointer to -a reentrancy structure, and <[fp]> must not be NULL. +The alternate function <<_fflush_r>> is a reentrant version, where the +extra argument <[reent]> is a pointer to a reentrancy structure, and +<[fp]> must not be NULL. RETURNS <<fflush>> returns <<0>> unless it encounters a write error; in that @@ -79,8 +57,6 @@ PORTABILITY ANSI C requires <<fflush>>. The behavior on input streams is only specified by POSIX, and not all implementations follow POSIX rules. -<<fflush_unlocked>> is a BSD extension also provided by GNU libc. - No supporting OS subroutines are required. */ @@ -89,12 +65,6 @@ No supporting OS subroutines are required. #include <errno.h> #include "local.h" -#ifdef __IMPL_UNLOCKED__ -#define _fflush_r _fflush_unlocked_r -#define fflush fflush_unlocked -#endif - -#ifndef __IMPL_UNLOCKED__ /* Flush a single file, or (if fp is NULL) all files. */ /* Core function which does not lock file pointer. This gets called @@ -234,21 +204,6 @@ _DEFUN(__sflush_r, (ptr, fp), return 0; } -#ifdef _STDIO_BSD_SEMANTICS -/* Called from _cleanup_r. At exit time, we don't need file locking, - and we don't want to move the underlying file pointer unless we're - writing. */ -int -_DEFUN(__sflushw_r, (ptr, fp), - struct _reent *ptr _AND - register FILE *fp) -{ - return (fp->_flags & __SWR) ? __sflush_r (ptr, fp) : 0; -} -#endif - -#endif /* __IMPL_UNLOCKED__ */ - int _DEFUN(_fflush_r, (ptr, fp), struct _reent *ptr _AND |