mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-01-16 11:31:00 +08:00
6485fc66f2
* libc/include/stdio_ext.h (FSETLOCKING_QUERY, FSETLOCKING_INTERNAL, FSETLOCKING_BYCALLER): Define. (__fsetlocking): Declare. * libc/stdio/Makefile.am: Build fsetlocking.c. * libc/stdio/Makefile.in: Regenerate. * libc/stdio/fsetlocking.c: New file. * libc/stdio/local.h (_newlib_flockfile_start): Make _flockfile call dependent on __SNLK flag. (_newlib_flockfile_exit, _newlib_flockfile_end): Ditto for _funlockfile calls. Define all locking macros as empty if __SINGLE_THREAD__. * libc/stdio/stdio.tex: Include fsetlocking.def.
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/*
|
|
* Copyright (c) 2014 Red Hat, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
/*
|
|
FUNCTION
|
|
<<__fsetlocking>>---set or query locking mode on FILE stream
|
|
|
|
INDEX
|
|
__fsetlocking
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <stdio.h>
|
|
#include <stdio_ext.h>
|
|
int __fsetlocking(FILE *<[fp]>, int <[type]>);
|
|
|
|
DESCRIPTION
|
|
This function sets how the stdio functions handle locking of FILE <[fp]>.
|
|
The following values describe <[type]>:
|
|
|
|
<<FSETLOCKING_INTERNAL>> is the default state, where stdio functions
|
|
automatically lock and unlock the stream.
|
|
|
|
<<FSETLOCKING_BYCALLER>> means that automatic locking in stdio functions
|
|
is disabled. Applications which set this take all responsibility for file
|
|
locking themselves.
|
|
|
|
<<FSETLOCKING_QUERY>> returns the current locking mode without changing it.
|
|
|
|
RETURNS
|
|
<<__fsetlocking>> returns the current locking mode of <[fp]>.
|
|
|
|
PORTABILITY
|
|
This function originates from Solaris and is also provided by GNU libc.
|
|
|
|
No supporting OS subroutines are required.
|
|
*/
|
|
|
|
#ifndef __rtems__
|
|
|
|
#include <_ansi.h>
|
|
#include <stdio.h>
|
|
#include <stdio_ext.h>
|
|
#include "local.h"
|
|
|
|
int
|
|
_DEFUN(__fsetlocking, (fp, type),
|
|
FILE * fp _AND
|
|
int type)
|
|
{
|
|
int result;
|
|
CHECK_INIT(_REENT, fp);
|
|
result = (fp->_flags2 & __SNLK) ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL;
|
|
switch (type)
|
|
{
|
|
case FSETLOCKING_BYCALLER:
|
|
fp->_flags2 |= __SNLK;
|
|
break;
|
|
case FSETLOCKING_INTERNAL:
|
|
fp->_flags2 &= ~__SNLK;
|
|
break;
|
|
case FSETLOCKING_QUERY:
|
|
default:
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
#endif /* __rtems__ */
|