ufs_file_base.h

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/***************************************************************************
 * include/stxxl/bits/io/ufs_file_base.h
 *
 * UNIX file system file base
 *
 * Part of the STXXL. See http://stxxl.sourceforge.net
 *
 * Copyright (C) 2002 Roman Dementiev <[email protected]>
 * Copyright (C) 2008 Andreas Beckmann <[email protected]>
 * Copyright (C) 2009 Johannes Singler <[email protected]>
 * Copyright (C) 2013 Timo Bingmann <[email protected]>
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE_1_0.txt or copy at
 * http://www.boost.org/LICENSE_1_0.txt)
 **************************************************************************/

#ifndef STXXL_IO_UFS_FILE_BASE_HEADER
#define STXXL_IO_UFS_FILE_BASE_HEADER

#include <stxxl/bits/common/mutex.h>
#include <stxxl/bits/io/file.h>
#include <stxxl/bits/namespace.h>

#include <string>

STXXL_BEGIN_NAMESPACE

//! \addtogroup fileimpl
//! \{

//! Base for UNIX file system implementations.
class ufs_file_base : public virtual file
{
protected:
 mutex fd_mutex; // sequentialize function calls involving file_des
 int file_des; // file descriptor
 int m_mode; // open mode
 const std::string filename;
 bool m_is_device; //!< is special device node
 ufs_file_base(const std::string& filename, int mode);
 void _after_open();
 offset_type _size();
 void _set_size(offset_type newsize);
 void close();

public:
 ~ufs_file_base();
 offset_type size();
 void set_size(offset_type newsize);
 void lock();
 const char * io_type() const;
 void close_remove();
 //! unlink file without closing it.
 void unlink();
 //! return true if file is special device node
 bool is_device() const;
};

//! \}

STXXL_END_NAMESPACE

#endif // !STXXL_IO_UFS_FILE_BASE_HEADER