memoryMap.h

/* Copyright (c) 2009, 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 EQBASE_MEMORYMAP_H
#define EQBASE_MEMORYMAP_H

#include <eq/base/base.h>
#include <eq/base/nonCopyable.h>

#include <string>

namespace eq
{
namespace base
{
    class MemoryMap : public NonCopyable
    {
    public:
        EQ_EXPORT MemoryMap();

        EQ_EXPORT ~MemoryMap();

        EQ_EXPORT const void* map( const std::string& fileName );

        EQ_EXPORT void unmap();

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

        size_t getSize() const { return _size; }

    private:
#ifdef WIN32
        HANDLE _map;
#else
        int _fd;
#endif

        void* _ptr;
        size_t _size;
    };

}
}

#endif //EQBASE_MEMORYMAP_H