// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//  * Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//  * Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//  * Neither the name of NVIDIA CORPORATION nor the names of its
//    contributors may be used to endorse or promote products derived
//    from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// 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_ALIGNED_MALLOC_H
#define PX_ALIGNED_MALLOC_H

#include "PxUserAllocated.h"

/*!
Allocate aligned memory.
Alignment must be a power of 2!
-- should be templated by a base allocator
*/

#if !PX_DOXYGEN
namespace physx
{
#endif
	/**
	Allocator, which is used to access the global PxAllocatorCallback instance
	(used for dynamic data types template instantiation), which can align memory
	*/

	// SCS: AlignedMalloc with 3 params not found, seems not used on PC either
	// disabled for now to avoid GCC error

	template <uint32_t N, typename BaseAllocator = PxAllocator>
	class PxAlignedAllocator : public BaseAllocator
	{
	public:
		PxAlignedAllocator(const BaseAllocator& base = BaseAllocator()) : BaseAllocator(base)
		{
		}

		void* allocate(size_t size, const char* file, int line)
		{
			size_t pad = N - 1 + sizeof(size_t); // store offset for delete.
			uint8_t* base = reinterpret_cast<uint8_t*>(BaseAllocator::allocate(size + pad, file, line));
			if (!base)
				return NULL;

			uint8_t* ptr = reinterpret_cast<uint8_t*>(size_t(base + pad) & ~(size_t(N) - 1)); // aligned pointer, ensuring N
																							  // is a size_t
																							  // wide mask
			reinterpret_cast<size_t*>(ptr)[-1] = size_t(ptr - base); // store offset

			return ptr;
		}
		void deallocate(void* ptr)
		{
			if (ptr == NULL)
				return;

			uint8_t* base = reinterpret_cast<uint8_t*>(ptr) - reinterpret_cast<size_t*>(ptr)[-1];
			BaseAllocator::deallocate(base);
		}
	};

#if !PX_DOXYGEN
} // namespace physx
#endif

#endif

