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// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// SPDX-FileCopyrightText: Copyright (c) 2008-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
#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, uint32_t* cookie=NULL)
{
PX_UNUSED(cookie);
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, uint32_t* cookie=NULL)
{
PX_UNUSED(cookie);
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