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b048323196
of the original file descriptor. - close() did not return 0 if the file descriptor in question was really just an alias. Fixed. - Added a feature which makes it possible to have several clients use the standard I/O streams (stdin/stdout/stderr) and have these referring to their process' Input()/Output()/ErrorOutput() streams. This is intended to support the upcoming shared library feature. git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14885 87f5fb63-7c3d-0410-a384-fd976d0f7a62
73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
/*
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* $Id: fcntl_lock.c,v 1.2 2005-03-12 09:43:47 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2005 by Olaf Barthel <olsen@sourcery.han.de>
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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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*
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* - 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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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _STDIO_HEADERS_H
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#include "stdio_headers.h"
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#endif /* _STDIO_HEADERS_H */
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/****************************************************************************/
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#if defined(__THREAD_SAFE)
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/****************************************************************************/
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void
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__fd_lock(struct fd * fd)
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{
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/* If this descriptor is really an alias, use the semaphore
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associated with the original instead. */
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if(fd != NULL && fd->fd_Original != NULL)
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fd = fd->fd_Original;
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if(fd != NULL && fd->fd_Lock != NULL)
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ObtainSemaphore(fd->fd_Lock);
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}
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/****************************************************************************/
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void
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__fd_unlock(struct fd * fd)
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{
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/* If this descriptor is really an alias, use the semaphore
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associated with the original instead. */
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if(fd != NULL && fd->fd_Original != NULL)
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fd = fd->fd_Original;
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if(fd != NULL && fd->fd_Lock != NULL)
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ReleaseSemaphore(fd->fd_Lock);
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}
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/****************************************************************************/
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#endif /* __THREAD_SAFE */
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