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include
stxxl
bits
io
boostfd_file.h
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/***************************************************************************
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* include/stxxl/bits/io/boostfd_file.h
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*
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* File implementation based on boost::iostreams::file_decriptor
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*
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* Part of the STXXL. See http://stxxl.sourceforge.net
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*
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* Copyright (C) 2006 Roman Dementiev <dementiev@ira.uka.de>
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* Copyright (C) 2008 Andreas Beckmann <beckmann@cs.uni-frankfurt.de>
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* Copyright (C) 2009 Johannes Singler <singler@ira.uka.de>
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*
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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**************************************************************************/
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#ifndef STXXL_BOOSTFD_FILE_H_
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#define STXXL_BOOSTFD_FILE_H_
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#ifndef STXXL_HAVE_BOOSTFD_FILE
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#ifdef STXXL_BOOST_CONFIG // if boost is available
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#define STXXL_HAVE_BOOSTFD_FILE 1
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#else
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#define STXXL_HAVE_BOOSTFD_FILE 0
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#endif
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#endif
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#if STXXL_HAVE_BOOSTFD_FILE
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#include <stxxl/bits/io/disk_queued_file.h>
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#include <stxxl/bits/io/request.h>
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#include <boost/iostreams/device/file_descriptor.hpp>
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__STXXL_BEGIN_NAMESPACE
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class
boostfd_file :
public
disk_queued_file
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{
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typedef
boost::iostreams::file_descriptor fd_type;
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protected
:
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mutex fd_mutex;
// sequentialize function calls involving file_des
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fd_type file_des;
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int
mode_;
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offset_type _size();
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public
:
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boostfd_file(
const
std::string & filename,
int
mode,
int
queue_id = DEFAULT_QUEUE,
int
allocator_id = NO_ALLOCATOR);
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~boostfd_file();
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offset_type
size
();
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void
set_size
(offset_type newsize);
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void
lock
();
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void
serve(
const
request
* req)
throw
(io_error);
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const
char
*
io_type
()
const
;
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};
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__STXXL_END_NAMESPACE
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#endif // #if STXXL_HAVE_BOOSTFD_FILE
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#endif // !STXXL_BOOSTFD_FILE_H_
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