BufferAllocationPolicy.hpp

/* ***** BEGIN LICENSE BLOCK *****
 * FW4SPL - Copyright (C) IRCAD, 2009-2015.
 * Distributed under the terms of the GNU Lesser General Public License (LGPL) as
 * published by the Free Software Foundation.
 * ****** END LICENSE BLOCK ****** */

#ifndef __FWMEMORY_BUFFERALLOCATIONPOLICY_HPP__
#define __FWMEMORY_BUFFERALLOCATIONPOLICY_HPP__

#include <fwCore/base.hpp>

#include "fwMemory/exception/Memory.hpp"
#include "fwMemory/config.hpp"

namespace fwMemory
{

class FWMEMORY_CLASS_API BufferAllocationPolicy
{
public:
    typedef SPTR (BufferAllocationPolicy) sptr;
    typedef size_t SizeType;
    typedef void* BufferType;

    FWMEMORY_API virtual void allocate(BufferType &buffer, SizeType size)   = 0;
    FWMEMORY_API virtual void reallocate(BufferType &buffer, SizeType size) = 0;
    FWMEMORY_API virtual void destroy(BufferType &buffer)                                                          = 0;

    FWMEMORY_API virtual ~BufferAllocationPolicy()
    {
    }
};


class FWMEMORY_CLASS_API BufferMallocPolicy : public BufferAllocationPolicy
{
public:
    FWMEMORY_API void allocate(BufferType &buffer,
                               BufferAllocationPolicy::SizeType size);
    FWMEMORY_API void reallocate(BufferType &buffer,
                                 BufferAllocationPolicy::SizeType size);
    FWMEMORY_API void destroy(BufferType &buffer);

    FWMEMORY_API static BufferAllocationPolicy::sptr New();
};


class FWMEMORY_CLASS_API BufferNewPolicy : public BufferAllocationPolicy
{
public:
    FWMEMORY_API void allocate(BufferType &buffer,
                               BufferAllocationPolicy::SizeType size);
    FWMEMORY_API void reallocate(BufferType &buffer,
                                 BufferAllocationPolicy::SizeType size);
    FWMEMORY_API void destroy(BufferType &buffer);

    FWMEMORY_API static BufferAllocationPolicy::sptr New();
};

class FWMEMORY_CLASS_API BufferNoAllocPolicy : public BufferAllocationPolicy
{
public:
    FWMEMORY_API void allocate(BufferType &buffer,
                               BufferAllocationPolicy::SizeType size);
    FWMEMORY_API void reallocate(BufferType &buffer,
                                 BufferAllocationPolicy::SizeType size);
    FWMEMORY_API void destroy(BufferType &buffer);

    FWMEMORY_API static BufferAllocationPolicy::sptr New();
};


}

#endif /* __FWMEMORY_BUFFERALLOCATIONPOLICY_HPP__ */