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// Copyright (c) 2008-2019 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.

#ifndef PSFOUNDATION_PSINLINEALLOCATOR_H
#define PSFOUNDATION_PSINLINEALLOCATOR_H

#include "PsUserAllocated.h"

namespace physx
{
namespace shdfnd
{
// this is used by the array class to allocate some space for a small number
// of objects along with the metadata
template <uint32_t N, typename BaseAllocator>
class InlineAllocator : private BaseAllocator
{
  public:
	InlineAllocator(const PxEMPTY v) : BaseAllocator(v)
	{
	}

	InlineAllocator(const BaseAllocator& alloc = BaseAllocator()) : BaseAllocator(alloc), mBufferUsed(false)
	{
	}

	InlineAllocator(const InlineAllocator& aloc) : BaseAllocator(aloc), mBufferUsed(false)
	{
	}

	void* allocate(uint32_t size, const char* filename, int line)
	{
		if(!mBufferUsed && size <= N)
		{
			mBufferUsed = true;
			return mBuffer;
		}
		return BaseAllocator::allocate(size, filename, line);
	}

	void deallocate(void* ptr)
	{
		if(ptr == mBuffer)
			mBufferUsed = false;
		else
			BaseAllocator::deallocate(ptr);
	}

	PX_FORCE_INLINE uint8_t* getInlineBuffer()
	{
		return mBuffer;
	}
	PX_FORCE_INLINE bool isBufferUsed() const
	{
		return mBufferUsed;
	}

  protected:
	uint8_t mBuffer[N];
	bool mBufferUsed;
};
} // namespace shdfnd
} // namespace physx

#endif // #ifndef PSFOUNDATION_PSINLINEALLOCATOR_H