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