memoryMap.h

/* Copyright (c) 2009-2013, Stefan Eilemann <eile@equalizergraphics.com>
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *
 * This library 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 library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef LUNCHBOX_MEMORYMAP_H
#define LUNCHBOX_MEMORYMAP_H

#include <lunchbox/api.h>
#include <lunchbox/nonCopyable.h>

#include <iostream>
#include <string>

namespace lunchbox
{
class MemoryMap : public NonCopyable
{
public:
    LUNCHBOX_API MemoryMap();

    LUNCHBOX_API MemoryMap( const std::string& filename );

    LUNCHBOX_API ~MemoryMap();

    LUNCHBOX_API const void* map( const std::string& filename );

    LUNCHBOX_API void unmap();

    const void* getAddress() const { return _ptr; }

    size_t getSize() const { return _size; }

private:
#ifdef _WIN32
    void* _map;
#else
    int _fd;
#endif

    void* _ptr;
    size_t _size;
};

inline std::ostream& operator << ( std::ostream& os, const MemoryMap& m )
{
    return os << "MemoryMap at " << m.getAddress() << " size " << m.getSize();
}

}

#endif //LUNCHBOX_MEMORYMAP_H