108 lines
4.3 KiB
C++
108 lines
4.3 KiB
C++
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/*
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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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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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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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(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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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 > struct rebind {
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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 > & ) { return *this; }
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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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