Bullet Collision Detection & Physics Library: btAlignedAllocator.h Source File

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btAlignedAllocator.h
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1/*
2Bullet Continuous Collision Detection and Physics Library
3Copyright (c) 2003-2006 Erwin Coumans https://bulletphysics.org
4
5This software is provided 'as-is', without any express or implied warranty.
6In no event will the authors be held liable for any damages arising from the use of this software.
7Permission is granted to anyone to use this software for any purpose,
8including commercial applications, and to alter it and redistribute it freely,
9subject to the following restrictions:
10
111. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
122. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
133. This notice may not be removed or altered from any source distribution.
14*/
15
16#ifndef BT_ALIGNED_ALLOCATOR
17#define BT_ALIGNED_ALLOCATOR
18
22
23#include "btScalar.h"
24
28#ifdef BT_DEBUG_MEMORY_ALLOCATIONS
29
30int btDumpMemoryLeaks();
31
32#define btAlignedAlloc(a, b) \
33 btAlignedAllocInternal(a, b, __LINE__, __FILE__)
34
35#define btAlignedFree(ptr) \
36 btAlignedFreeInternal(ptr, __LINE__, __FILE__)
37
38void* btAlignedAllocInternal(size_t size, int alignment, int line, const char* filename);
39
40void btAlignedFreeInternal(void* ptr, int line, const char* filename);
41
42#else
43void* btAlignedAllocInternal(size_t size, int alignment);
44void btAlignedFreeInternal(void* ptr);
45
46#define btAlignedAlloc(size, alignment) btAlignedAllocInternal(size, alignment)
47#define btAlignedFree(ptr) btAlignedFreeInternal(ptr)
48
49#endif
50 typedef int size_type;
51
52 typedef void*(btAlignedAllocFunc)(size_t size, int alignment);
53 typedef void(btAlignedFreeFunc)(void* memblock);
54 typedef void*(btAllocFunc)(size_t size);
55 typedef void(btFreeFunc)(void* memblock);
56
58void btAlignedAllocSetCustom(btAllocFunc* allocFunc, btFreeFunc* freeFunc);
60void btAlignedAllocSetCustomAligned(btAlignedAllocFunc* allocFunc, btAlignedFreeFunc* freeFunc);
61
64template <typename T, unsigned Alignment>
65 class btAlignedAllocator
66{
67 typedef btAlignedAllocator<T, Alignment> self_type;
68
69public:
70 //just going down a list:
71 btAlignedAllocator() {}
72 /*
73 btAlignedAllocator( const self_type & ) {}
74 */
75
76 template <typename Other>
77 btAlignedAllocator(const btAlignedAllocator<Other, Alignment>&)
78 {
79 }
80
81 typedef const T* const_pointer;
82 typedef const T& const_reference;
83 typedef T* pointer;
84 typedef T& reference;
85 typedef T value_type;
86
87 pointer address(reference ref) const { return &ref; }
88 const_pointer address(const_reference ref) const { return &ref; }
89 pointer allocate(size_type n, const_pointer* hint = 0)
90 {
91 (void)hint;
92 return reinterpret_cast<pointer>(btAlignedAlloc(sizeof(value_type) * n, Alignment));
93 }
94 void construct(pointer ptr, const value_type& value) { new (ptr) value_type(value); }
95 void deallocate(pointer ptr)
96 {
97 btAlignedFree(reinterpret_cast<void*>(ptr));
98 }
99 void destroy(pointer ptr) { ptr->~value_type(); }
100
101 template <typename O>
102 struct rebind
103 {
104 typedef btAlignedAllocator<O, Alignment> other;
105 };
106 template <typename O>
107 self_type& operator=(const btAlignedAllocator<O, Alignment>&)
108 {
109 return *this;
110 }
111
112 friend bool operator==(const self_type&, const self_type&) { return true; }
113};
114
115#endif //BT_ALIGNED_ALLOCATOR
btAlignedFree
#define btAlignedFree(ptr)
Definition btAlignedAllocator.h:47
btAlignedAllocFunc
void * btAlignedAllocFunc(size_t size, int alignment)
Definition btAlignedAllocator.h:52
btAlignedAlloc
#define btAlignedAlloc(size, alignment)
Definition btAlignedAllocator.h:46
btAlignedAllocInternal
void * btAlignedAllocInternal(size_t size, int alignment)
we probably replace this with our own aligned memory allocator so we replace _aligned_malloc and _ali...
Definition btAlignedAllocator.cpp:249
btAlignedAllocSetCustomAligned
void btAlignedAllocSetCustomAligned(btAlignedAllocFunc *allocFunc, btAlignedFreeFunc *freeFunc)
If the developer has already an custom aligned allocator, then btAlignedAllocSetCustomAligned can be ...
Definition btAlignedAllocator.cpp:99
btAllocFunc
void * btAllocFunc(size_t size)
Definition btAlignedAllocator.h:54
btAlignedFreeFunc
void btAlignedFreeFunc(void *memblock)
Definition btAlignedAllocator.h:53
btFreeFunc
void btFreeFunc(void *memblock)
Definition btAlignedAllocator.h:55
size_type
int size_type
Definition btAlignedAllocator.h:50
btAlignedFreeInternal
void btAlignedFreeInternal(void *ptr)
Definition btAlignedAllocator.cpp:257
btAlignedAllocSetCustom
void btAlignedAllocSetCustom(btAllocFunc *allocFunc, btFreeFunc *freeFunc)
The developer can let all Bullet memory allocations go through a custom memory allocator,...
Definition btAlignedAllocator.cpp:105
size
static DBVT_INLINE btScalar size(const btDbvtVolume &a)
Definition btDbvt.cpp:52
btScalar.h
btAlignedAllocator
The btAlignedAllocator is a portable class for aligned memory allocations.
Definition btAlignedAllocator.h:66
btAlignedAllocator::btAlignedAllocator
btAlignedAllocator()
Definition btAlignedAllocator.h:71
btAlignedAllocator::allocate
pointer allocate(size_type n, const_pointer *hint=0)
Definition btAlignedAllocator.h:89
btAlignedAllocator::self_type
btAlignedAllocator< T, Alignment > self_type
Definition btAlignedAllocator.h:67
btAlignedAllocator::address
const_pointer address(const_reference ref) const
Definition btAlignedAllocator.h:88
btAlignedAllocator::destroy
void destroy(pointer ptr)
Definition btAlignedAllocator.h:99
btAlignedAllocator::btAlignedAllocator
btAlignedAllocator(const btAlignedAllocator< Other, Alignment > &)
Definition btAlignedAllocator.h:77
btAlignedAllocator::reference
T & reference
Definition btAlignedAllocator.h:84
btAlignedAllocator::operator==
friend bool operator==(const self_type &, const self_type &)
Definition btAlignedAllocator.h:112
btAlignedAllocator::deallocate
void deallocate(pointer ptr)
Definition btAlignedAllocator.h:95
btAlignedAllocator::const_pointer
const T * const_pointer
Definition btAlignedAllocator.h:81
btAlignedAllocator::operator=
self_type & operator=(const btAlignedAllocator< O, Alignment > &)
Definition btAlignedAllocator.h:107
btAlignedAllocator::address
pointer address(reference ref) const
Definition btAlignedAllocator.h:87
btAlignedAllocator::pointer
T * pointer
Definition btAlignedAllocator.h:83
btAlignedAllocator::value_type
T value_type
Definition btAlignedAllocator.h:85
btAlignedAllocator::const_reference
const T & const_reference
Definition btAlignedAllocator.h:82
btAlignedAllocator::construct
void construct(pointer ptr, const value_type &value)
Definition btAlignedAllocator.h:94
btAlignedAllocator::rebind
Definition btAlignedAllocator.h:103
btAlignedAllocator::rebind::other
btAlignedAllocator< O, Alignment > other
Definition btAlignedAllocator.h:104