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29
30#ifndef PSFOUNDATION_PSALIGNEDMALLOC_H
31#define PSFOUNDATION_PSALIGNEDMALLOC_H
32
33#include "PsUserAllocated.h"
34
35/*!
36Allocate aligned memory.
37Alignment must be a power of 2!
38-- should be templated by a base allocator
39*/
40
41namespace physx
42{
43namespace shdfnd
44{
45/**
46Allocator, which is used to access the global PxAllocatorCallback instance
47(used for dynamic data types template instantiation), which can align memory
48*/
49
50// SCS: AlignedMalloc with 3 params not found, seems not used on PC either
51// disabled for now to avoid GCC error
52
53template <uint32_t N, typename BaseAllocator = NonTrackingAllocator>
54class AlignedAllocator : public BaseAllocator
55{
56 public:
57 AlignedAllocator(const BaseAllocator& base = BaseAllocator()) : BaseAllocator(base)
58 {
59 }
60
61 void* allocate(size_t size, const char* file, int line)
62 {
63 size_t pad = N - 1 + sizeof(size_t); // store offset for delete.
64 uint8_t* base = reinterpret_cast<uint8_t*>(BaseAllocator::allocate(size + pad, file, line));
65 if(!base)
66 return NULL;
67
68 uint8_t* ptr = reinterpret_cast<uint8_t*>(size_t(base + pad) & ~(size_t(N) - 1)); // aligned pointer, ensuring N
69 // is a size_t
70 // wide mask
71 reinterpret_cast<size_t*>(ptr)[-1] = size_t(ptr - base); // store offset
72
73 return ptr;
74 }
75 void deallocate(void* ptr)
76 {
77 if(ptr == NULL)
78 return;
79
80 uint8_t* base = reinterpret_cast<uint8_t*>(ptr) - reinterpret_cast<size_t*>(ptr)[-1];
81 BaseAllocator::deallocate(base);
82 }
83};
84
85} // namespace shdfnd
86} // namespace physx
87
88#endif // #ifndef PSFOUNDATION_PSALIGNEDMALLOC_H
89

source code of qtquick3dphysics/src/3rdparty/PhysX/source/foundation/include/PsAlignedMalloc.h