linuxaio_file.cpp

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/***************************************************************************
 *  lib/io/linuxaio_file.cpp
 *
 *  Part of the STXXL. See http://stxxl.sourceforge.net
 *
 *  Copyright (C) 2011 Johannes Singler <[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)
 **************************************************************************/

#include <stxxl/bits/io/linuxaio_file.h>

#if STXXL_HAVE_LINUXAIO_FILE

#include <stxxl/bits/io/linuxaio_request.h>
#include <stxxl/bits/io/disk_queues.h>

STXXL_BEGIN_NAMESPACE

request_ptr linuxaio_file::aread(
    void* buffer,
    offset_type pos,
    size_type bytes,
    const completion_handler& on_cmpl)
{
    request_ptr req(new linuxaio_request(on_cmpl, this, buffer, pos, bytes, request::READ));

    disk_queues::get_instance()->add_request(req, get_queue_id());

    return req;
}

request_ptr linuxaio_file::awrite(
    void* buffer,
    offset_type pos,
    size_type bytes,
    const completion_handler& on_cmpl)
{
    request_ptr req(new linuxaio_request(on_cmpl, this, buffer, pos, bytes, request::WRITE));

    disk_queues::get_instance()->add_request(req, get_queue_id());

    return req;
}

void linuxaio_file::serve(void* buffer, offset_type offset, size_type bytes,
                          request::request_type type)
{
    // req need not be an linuxaio_request
    if (type == request::READ)
        aread(buffer, offset, bytes)->wait();
    else
        awrite(buffer, offset, bytes)->wait();
}

const char* linuxaio_file::io_type() const
{
    return "linuxaio";
}

STXXL_END_NAMESPACE

#endif // #if STXXL_HAVE_LINUXAIO_FILE
// vim: et:ts=4:sw=4