libvips/libsrc/iofuncs/im_unmapfile.c

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2007-08-29 18:23:50 +02:00
/* @(#) Function which unmaps a file memory mapped by mapfile()
* @(#) The argument baseaddress should be the pointer returned by mapfile();
* @(#) The function finds the size of the file from
* @(#)
* @(#) int im_unmapfile(fd, baseaddress)
* @(#) int fd;
* @(#) char *baseaddress;
* @(#)
* @(#) Returns 0 on success and -1 on error.
* @(#)
* Copyright: Nicos Dessipris
* Wriiten on: 13/02/1990
* Updated on:
* 18/4/97 JC
* - ANSIfied
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <sys/types.h>
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#include <sys/stat.h>
#include <vips/vips.h>
#include <vips/internal.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
int
im_unmapfile( IMAGE *im )
{
if( im__munmap( im->baseaddr, im->length ) )
return( -1 );
im->baseaddr = NULL;
im->length = 0;
return( 0 );
}