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410833d2ed
function pointers alone. The utility.library/CallHookPkt mechanism is no longer required. - Moved the entire lseek() code relevant for files into the hook function. - Simplified the close() function which now just calls into the hook code to perform whatever is necessary. The hook code is responsible for cleaning up after aliases, etc. This change in turn made it possible to greatly simplify the hook code for buffered files which now bypasses close/read/write/lseek and directly invokes the hook code for unbuffered files. git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14835 87f5fb63-7c3d-0410-a384-fd976d0f7a62
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/*
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* $Id: stdio_remove_fd_alias.c,v 1.1 2005-02-20 13:19:40 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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void
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__remove_fd_alias(struct fd * fd)
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{
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assert( fd != NULL );
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if(fd->fd_Original != NULL) /* this is an alias */
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{
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struct fd * list_fd;
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assert( fd->fd_Original != fd );
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assert( fd->fd_Original->fd_Original == NULL );
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/* Remove this alias from the list. */
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for(list_fd = fd->fd_Original ;
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list_fd != NULL ;
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list_fd = list_fd->fd_NextLink)
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{
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if(list_fd->fd_NextLink == fd)
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{
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list_fd->fd_NextLink = fd->fd_NextLink;
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break;
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}
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}
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}
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else if (fd->fd_NextLink != NULL) /* this one has aliases attached; it is the 'original' resource */
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{
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struct fd * first_alias;
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struct fd * list_fd;
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/* The first link now becomes the original resource */
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first_alias = fd->fd_NextLink;
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first_alias->fd_Original = NULL;
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/* The resources are migrated to the first link. */
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for(list_fd = first_alias->fd_NextLink ;
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list_fd != NULL ;
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list_fd = list_fd->fd_NextLink)
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{
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list_fd->fd_Original = first_alias;
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}
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}
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}
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