/***************************************************************************
 *  include/stxxl/bits/io/syscall_file.h
 *
 *  Part of the STXXL. See http://stxxl.sourceforge.net
 *
 *  Copyright (C) 2002 Roman Dementiev <dementiev@mpi-sb.mpg.de>
 *  Copyright (C) 2008 Andreas Beckmann <beckmann@cs.uni-frankfurt.de>
 *  Copyright (C) 2009 Johannes Singler <singler@ira.uka.de>
 *  Copyright (C) 2014 Timo Bingmann <tb@panthema.net>
 *
 *  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_SYSCALL_FILE_HEADER
#define STXXL_IO_SYSCALL_FILE_HEADER

#include <stxxl/bits/io/ufs_file_base.h>
#include <stxxl/bits/io/disk_queued_file.h>

STXXL_BEGIN_NAMESPACE

//! \addtogroup fileimpl
//! \{

//! Implementation of file based on UNIX syscalls.
class syscall_file : public ufs_file_base, public disk_queued_file
{
public:
    //! Constructs file object.
    //! \param filename path of file
    //! \param mode open mode, see \c stxxl::file::open_modes
    //! \param queue_id disk queue identifier
    //! \param allocator_id linked disk_allocator
    //! \param device_id physical device identifier
    syscall_file(
        const std::string& filename,
        int mode,
        int queue_id = DEFAULT_QUEUE,
        int allocator_id = NO_ALLOCATOR,
        unsigned int device_id = DEFAULT_DEVICE_ID)
        : file(device_id),
          ufs_file_base(filename, mode),
          disk_queued_file(queue_id, allocator_id)
    { }
    void serve(void* buffer, offset_type offset, size_type bytes,
               request::request_type type);
    const char * io_type() const;
};

//! \}

STXXL_END_NAMESPACE

#endif // !STXXL_IO_SYSCALL_FILE_HEADER
