90 lines
3.2 KiB
C++
90 lines
3.2 KiB
C++
// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of NVIDIA CORPORATION nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Copyright (c) 2008-2023 NVIDIA Corporation. All rights reserved.
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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
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// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
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#ifndef PX_ALIGNED_MALLOC_H
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#define PX_ALIGNED_MALLOC_H
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#include "PxUserAllocated.h"
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/*!
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Allocate aligned memory.
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Alignment must be a power of 2!
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-- should be templated by a base allocator
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*/
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#if !PX_DOXYGEN
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namespace physx
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{
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#endif
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/**
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Allocator, which is used to access the global PxAllocatorCallback instance
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(used for dynamic data types template instantiation), which can align memory
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*/
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// SCS: AlignedMalloc with 3 params not found, seems not used on PC either
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// disabled for now to avoid GCC error
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template <uint32_t N, typename BaseAllocator = PxAllocator>
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class PxAlignedAllocator : public BaseAllocator
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{
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public:
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PxAlignedAllocator(const BaseAllocator& base = BaseAllocator()) : BaseAllocator(base)
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{
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}
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void* allocate(size_t size, const char* file, int line)
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{
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size_t pad = N - 1 + sizeof(size_t); // store offset for delete.
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uint8_t* base = reinterpret_cast<uint8_t*>(BaseAllocator::allocate(size + pad, file, line));
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if (!base)
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return NULL;
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uint8_t* ptr = reinterpret_cast<uint8_t*>(size_t(base + pad) & ~(size_t(N) - 1)); // aligned pointer, ensuring N
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// is a size_t
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// wide mask
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reinterpret_cast<size_t*>(ptr)[-1] = size_t(ptr - base); // store offset
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return ptr;
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}
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void deallocate(void* ptr)
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{
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if (ptr == NULL)
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return;
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uint8_t* base = reinterpret_cast<uint8_t*>(ptr) - reinterpret_cast<size_t*>(ptr)[-1];
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BaseAllocator::deallocate(base);
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}
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};
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#if !PX_DOXYGEN
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} // namespace physx
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#endif
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#endif
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