NonMovingBaseAllocator.h

/* Copyright (c) 2015-2016, Human Brain Project
 *                          Stefan.Eilemann@epfl.ch
 *                          grigori.chevtchenko@epfl.ch
 */

#ifndef ZEROBUF_NONMOVINGBASEALLOCATOR_H
#define ZEROBUF_NONMOVINGBASEALLOCATOR_H

#include <zerobuf/Allocator.h> // base class
#include <zerobuf/api.h>

namespace zerobuf
{
class NonMovingBaseAllocator : public Allocator
{
public:
    ZEROBUF_API NonMovingBaseAllocator(size_t staticSize, size_t numDynamic);

    ZEROBUF_API virtual ~NonMovingBaseAllocator();

    ZEROBUF_API uint8_t* updateAllocation(size_t index, bool copy,
                                          size_t size) final;
    ZEROBUF_API void compact(float threshold) final;

protected:
    virtual void _resize(size_t newSize) = 0;

private:
    NonMovingBaseAllocator(const NonMovingBaseAllocator&) = delete;
    NonMovingBaseAllocator& operator=(const NonMovingBaseAllocator&) = delete;

    size_t _staticSize;
    size_t _numDynamic;

    uint8_t* _moveAllocation(size_t index, bool copy, size_t newOffset,
                             size_t newSize);
};
}
#endif