1 /* 2 Bullet Continuous Collision Detection and Physics Library 3 Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ 4 5 This software is provided 'as-is', without any express or implied warranty. 6 In no event will the authors be held liable for any damages arising from the use of this software. 7 Permission is granted to anyone to use this software for any purpose, 8 including commercial applications, and to alter it and redistribute it freely, 9 subject to the following restrictions: 10 11 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. 12 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 13 3. 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 19 ///we probably replace this with our own aligned memory allocator 20 ///so we replace _aligned_malloc and _aligned_free with our own 21 ///that is better portable and more predictable 22 23 #include "btScalar.h" 24 //#define BT_DEBUG_MEMORY_ALLOCATIONS 1 25 #ifdef BT_DEBUG_MEMORY_ALLOCATIONS 26 27 #define btAlignedAlloc(a,b) \ 28 btAlignedAllocInternal(a,b,__LINE__,__FILE__) 29 30 #define btAlignedFree(ptr) \ 31 btAlignedFreeInternal(ptr,__LINE__,__FILE__) 32 33 void* btAlignedAllocInternal (size_t size, int alignment,int line,char* filename); 34 35 void btAlignedFreeInternal (void* ptr,int line,char* filename); 36 37 #else 38 void* btAlignedAllocInternal (size_t size, int alignment); 39 void btAlignedFreeInternal (void* ptr); 40 41 #define btAlignedAlloc(size,alignment) btAlignedAllocInternal(size,alignment) 42 #define btAlignedFree(ptr) btAlignedFreeInternal(ptr) 43 44 #endif 45 typedef int size_type; 46 47 typedef void *(btAlignedAllocFunc)(size_t size, int alignment); 48 typedef void (btAlignedFreeFunc)(void *memblock); 49 typedef void *(btAllocFunc)(size_t size); 50 typedef void (btFreeFunc)(void *memblock); 51 52 ///The developer can let all Bullet memory allocations go through a custom memory allocator, using btAlignedAllocSetCustom 53 void btAlignedAllocSetCustom(btAllocFunc *allocFunc, btFreeFunc *freeFunc); 54 ///If the developer has already an custom aligned allocator, then btAlignedAllocSetCustomAligned can be used. The default aligned allocator pre-allocates extra memory using the non-aligned allocator, and instruments it. 55 void btAlignedAllocSetCustomAligned(btAlignedAllocFunc *allocFunc, btAlignedFreeFunc *freeFunc); 56 57 58 ///The btAlignedAllocator is a portable class for aligned memory allocations. 59 ///Default implementations for unaligned and aligned allocations can be overridden by a custom allocator using btAlignedAllocSetCustom and btAlignedAllocSetCustomAligned. 60 template < typename T , unsigned Alignment > 61 class btAlignedAllocator { 62 63 typedef btAlignedAllocator< T , Alignment > self_type; 64 65 public: 66 67 //just going down a list: btAlignedAllocator()68 btAlignedAllocator() {} 69 /* 70 btAlignedAllocator( const self_type & ) {} 71 */ 72 73 template < typename Other > btAlignedAllocator(const btAlignedAllocator<Other,Alignment> &)74 btAlignedAllocator( const btAlignedAllocator< Other , Alignment > & ) {} 75 76 typedef const T* const_pointer; 77 typedef const T& const_reference; 78 typedef T* pointer; 79 typedef T& reference; 80 typedef T value_type; 81 address(reference ref)82 pointer address ( reference ref ) const { return &ref; } address(const_reference ref)83 const_pointer address ( const_reference ref ) const { return &ref; } 84 pointer allocate ( size_type n , const_pointer * hint = 0 ) { 85 (void)hint; 86 return reinterpret_cast< pointer >(btAlignedAlloc( sizeof(value_type) * n , Alignment )); 87 } construct(pointer ptr,const value_type & value)88 void construct ( pointer ptr , const value_type & value ) { new (ptr) value_type( value ); } deallocate(pointer ptr)89 void deallocate( pointer ptr ) { 90 btAlignedFree( reinterpret_cast< void * >( ptr ) ); 91 } destroy(pointer ptr)92 void destroy ( pointer ptr ) { ptr->~value_type(); } 93 94 95 template < typename O > struct rebind { 96 typedef btAlignedAllocator< O , Alignment > other; 97 }; 98 template < typename O > 99 self_type & operator=( const btAlignedAllocator< O , Alignment > & ) { return *this; } 100 101 friend bool operator==( const self_type & , const self_type & ) { return true; } 102 }; 103 104 105 106 #endif //BT_ALIGNED_ALLOCATOR 107 108