111 lines
4.0 KiB
C++
111 lines
4.0 KiB
C++
/*
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Bullet Continuous Collision Detection and Physics Library
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Copyright (c) 2003-2013 Erwin Coumans http://bulletphysics.org
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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1. 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.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef B3_ALIGNED_ALLOCATOR
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#define B3_ALIGNED_ALLOCATOR
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///we probably replace this with our own aligned memory allocator
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///so we replace _aligned_malloc and _aligned_free with our own
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///that is better portable and more predictable
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#include "b3Scalar.h"
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//#define B3_DEBUG_MEMORY_ALLOCATIONS 1
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#ifdef B3_DEBUG_MEMORY_ALLOCATIONS
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#define b3AlignedAlloc(a, b) \
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b3AlignedAllocInternal(a, b, __LINE__, __FILE__)
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#define b3AlignedFree(ptr) \
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b3AlignedFreeInternal(ptr, __LINE__, __FILE__)
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void* b3AlignedAllocInternal(size_t size, int alignment, int line, char* filename);
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void b3AlignedFreeInternal(void* ptr, int line, char* filename);
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#else
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void* b3AlignedAllocInternal(size_t size, int alignment);
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void b3AlignedFreeInternal(void* ptr);
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#define b3AlignedAlloc(size, alignment) b3AlignedAllocInternal(size, alignment)
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#define b3AlignedFree(ptr) b3AlignedFreeInternal(ptr)
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#endif
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typedef int btSizeType;
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typedef void*(b3AlignedAllocFunc)(size_t size, int alignment);
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typedef void(b3AlignedFreeFunc)(void* memblock);
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typedef void*(b3AllocFunc)(size_t size);
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typedef void(b3FreeFunc)(void* memblock);
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///The developer can let all Bullet memory allocations go through a custom memory allocator, using b3AlignedAllocSetCustom
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void b3AlignedAllocSetCustom(b3AllocFunc* allocFunc, b3FreeFunc* freeFunc);
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///If the developer has already an custom aligned allocator, then b3AlignedAllocSetCustomAligned can be used. The default aligned allocator pre-allocates extra memory using the non-aligned allocator, and instruments it.
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void b3AlignedAllocSetCustomAligned(b3AlignedAllocFunc* allocFunc, b3AlignedFreeFunc* freeFunc);
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///The b3AlignedAllocator is a portable class for aligned memory allocations.
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///Default implementations for unaligned and aligned allocations can be overridden by a custom allocator using b3AlignedAllocSetCustom and b3AlignedAllocSetCustomAligned.
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template <typename T, unsigned Alignment>
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class b3AlignedAllocator
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{
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typedef b3AlignedAllocator<T, Alignment> self_type;
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public:
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//just going down a list:
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b3AlignedAllocator() {}
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/*
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b3AlignedAllocator( const self_type & ) {}
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*/
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template <typename Other>
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b3AlignedAllocator(const b3AlignedAllocator<Other, Alignment>&)
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{
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}
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typedef const T* const_pointer;
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typedef const T& const_reference;
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typedef T* pointer;
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typedef T& reference;
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typedef T value_type;
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pointer address(reference ref) const { return &ref; }
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const_pointer address(const_reference ref) const { return &ref; }
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pointer allocate(btSizeType n, const_pointer* hint = 0)
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{
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(void)hint;
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return reinterpret_cast<pointer>(b3AlignedAlloc(sizeof(value_type) * n, Alignment));
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}
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void construct(pointer ptr, const value_type& value) { new (ptr) value_type(value); }
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void deallocate(pointer ptr)
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{
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b3AlignedFree(reinterpret_cast<void*>(ptr));
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}
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void destroy(pointer ptr) { ptr->~value_type(); }
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template <typename O>
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struct rebind
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{
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typedef b3AlignedAllocator<O, Alignment> other;
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};
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template <typename O>
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self_type& operator=(const b3AlignedAllocator<O, Alignment>&)
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{
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return *this;
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}
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friend bool operator==(const self_type&, const self_type&) { return true; }
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};
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#endif //B3_ALIGNED_ALLOCATOR
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