89 lines
3.1 KiB
C
89 lines
3.1 KiB
C
|
//
|
||
|
|
// 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) 2008-2019 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_PSALIGNEDMALLOC_H
|
||
|
|
#define PSFOUNDATION_PSALIGNEDMALLOC_H
|
||
|
|
|
||
|
|
#include "PsUserAllocated.h"
|
||
|
|
|
||
|
|
/*!
|
||
|
|
Allocate aligned memory.
|
||
|
|
Alignment must be a power of 2!
|
||
|
|
-- should be templated by a base allocator
|
||
|
|
*/
|
||
|
|
|
||
|
|
namespace physx
|
||
|
|
{
|
||
|
|
namespace shdfnd
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
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 = NonTrackingAllocator>
|
||
|
|
class AlignedAllocator : public BaseAllocator
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
AlignedAllocator(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);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace shdfnd
|
||
|
|
} // namespace physx
|
||
|
|
|
||
|
|
#endif // #ifndef PSFOUNDATION_PSALIGNEDMALLOC_H
|