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// Copyright (c) 2008-2023 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 PX_INLINE_ALLOCATOR_H
#define PX_INLINE_ALLOCATOR_H

#include "foundation/PxUserAllocated.h"

#if !PX_DOXYGEN
namespace physx
{
#endif
// this is used by the array class to allocate some space for a small number
// of objects along with the metadata
template <PxU32 N, typename BaseAllocator>
class PxInlineAllocator : private BaseAllocator
{
  public:
	PxInlineAllocator(const PxEMPTY v) : BaseAllocator(v)
	{
	}

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

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

	void* allocate(PxU32 size, const char* filename, PxI32 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 PxU8* getInlineBuffer()
	{
		return mBuffer;
	}
	PX_FORCE_INLINE bool isBufferUsed() const
	{
		return mBufferUsed;
	}

  protected:
	PxU8 mBuffer[N];
	bool mBufferUsed;
};
#if !PX_DOXYGEN
} // namespace physx
#endif

#endif