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cache_aligned_allocator.h

00001 /*
00002     Copyright 2005-2008 Intel Corporation.  All Rights Reserved.
00003 
00004     The source code contained or described herein and all documents related
00005     to the source code ("Material") are owned by Intel Corporation or its
00006     suppliers or licensors.  Title to the Material remains with Intel
00007     Corporation or its suppliers and licensors.  The Material is protected
00008     by worldwide copyright laws and treaty provisions.  No part of the
00009     Material may be used, copied, reproduced, modified, published, uploaded,
00010     posted, transmitted, distributed, or disclosed in any way without
00011     Intel's prior express written permission.
00012 
00013     No license under any patent, copyright, trade secret or other
00014     intellectual property right is granted to or conferred upon you by
00015     disclosure or delivery of the Materials, either expressly, by
00016     implication, inducement, estoppel or otherwise.  Any license under such
00017     intellectual property rights must be express and approved by Intel in
00018     writing.
00019 */
00020 
00021 #ifndef __TBB_cache_aligned_allocator_H
00022 #define __TBB_cache_aligned_allocator_H
00023 
00024 #include <new>
00025 #include "tbb_stddef.h"
00026 
00027 namespace tbb {
00028 
00030 namespace internal {
00032 
00035     const size_t NFS_MaxLineSize = 128;
00036 
00038 
00039     size_t NFS_GetLineSize();
00040 
00042 
00043     void* NFS_Allocate( size_t n_element, size_t element_size, void* hint );
00044 
00046 
00048     void NFS_Free( void* );
00049 }
00051 
00053 
00056 template<typename T>
00057 class cache_aligned_allocator {
00058 public:
00059     typedef T* pointer;
00060     typedef const T* const_pointer;
00061     typedef T& reference;
00062     typedef const T& const_reference;
00063     typedef T value_type;
00064     typedef size_t size_type;
00065     typedef ptrdiff_t difference_type;
00066     template<typename U> struct rebind {
00067         typedef cache_aligned_allocator<U> other;
00068     };
00069 
00070 #if _WIN64
00071 
00072 
00074     char* _Charalloc( size_type size ) {
00075         return (char*)internal::NFS_Allocate( size, sizeof(T), 0 );
00076     }
00077 #endif /* _WIN64 */
00078 
00079     cache_aligned_allocator() throw() {}
00080     cache_aligned_allocator( const cache_aligned_allocator& ) throw() {}
00081     template<typename U> cache_aligned_allocator(const cache_aligned_allocator<U>&) throw() {}
00082 
00083     pointer address(reference x) const {return &x;}
00084     const_pointer address(const_reference x) const {return &x;}
00085     
00087     pointer allocate( size_type n, const void* hint=0 ) {
00088         // The "hint" argument is always ignored in NFS_Allocate thus const_cast shouldn't hurt
00089         return pointer(internal::NFS_Allocate( n, sizeof(T), const_cast<void*>(hint) ));
00090     }
00091 
00093     void deallocate( pointer p, size_type ) {
00094         internal::NFS_Free(p);
00095     }
00096 
00098     size_type max_size() const throw() {
00099         return (~size_t(0)-internal::NFS_MaxLineSize)/sizeof(T);
00100     }
00101 
00103     void construct( pointer p, const T& value ) {new(static_cast<void*>(p)) T(value);}
00104 
00106     void destroy( pointer p ) {p->~T();}
00107 };
00108 
00110 
00111 template<> 
00112 class cache_aligned_allocator<void> {
00113 public:
00114     typedef void* pointer;
00115     typedef const void* const_pointer;
00116     typedef void value_type;
00117     template<typename U> struct rebind {
00118         typedef cache_aligned_allocator<U> other;
00119     };
00120 };
00121 
00122 template<typename T, typename U>
00123 inline bool operator==( const cache_aligned_allocator<T>&, const cache_aligned_allocator<U>& ) {return true;}
00124 
00125 template<typename T, typename U>
00126 inline bool operator!=( const cache_aligned_allocator<T>&, const cache_aligned_allocator<U>& ) {return false;}
00127 
00128 } // namespace ThreadBuildingBlocks 
00129 
00130 #endif /* __TBB_cache_aligned_allocator_H */

Copyright © 2005-2008 Intel Corporation. All Rights Reserved.

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