cache_aligned_allocator.h Source File

- Main Page
- Modules
- Namespaces
- Classes
- Files
- Related Pages

- File List
- File Members

# cache_aligned_allocator.h

    00001 /*
    00002     Copyright 2005-2012 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 #if __TBB_CPP11_RVALUE_REF_PRESENT && !__TBB_CPP11_STD_FORWARD_BROKEN
    00027  #include <utility> // std::forward
    00028 #endif
    00029
    00030 namespace tbb {
    00031
    00033 namespace internal {
    00035
    00036     size_t __TBB_EXPORTED_FUNC NFS_GetLineSize();
    00037
    00039
    00040     void* __TBB_EXPORTED_FUNC NFS_Allocate( size_t n_element, size_t element_size, void* hint );
    00041
    00043
    00045     void __TBB_EXPORTED_FUNC NFS_Free( void* );
    00046 }
    00048
    00049 #if _MSC_VER && !defined(__INTEL_COMPILER)
    00050     // Workaround for erroneous "unreferenced parameter" warning in method destroy.
    00051     #pragma warning (push)
    00052     #pragma warning (disable: 4100)
    00053 #endif
    00054
    00056
    00059 template<typename T>
    00060 class cache_aligned_allocator {
    00061 public:
    00062     typedef typename internal::allocator_type<T>::value_type value_type;
    00063     typedef value_type* pointer;
    00064     typedef const value_type* const_pointer;
    00065     typedef value_type& reference;
    00066     typedef const value_type& const_reference;
    00067     typedef size_t size_type;
    00068     typedef ptrdiff_t difference_type;
    00069     template<typename U> struct rebind {
    00070         typedef cache_aligned_allocator<U> other;
    00071     };
    00072
    00073     cache_aligned_allocator() throw() {}
    00074     cache_aligned_allocator( const cache_aligned_allocator& ) throw() {}
    00075     template<typename U> cache_aligned_allocator(const cache_aligned_allocator<U>&) throw() {}
    00076
    00077     pointer address(reference x) const {return &x;}
    00078     const_pointer address(const_reference x) const {return &x;}
    00079
    00081     pointer allocate( size_type n, const void* hint=0 ) {
    00082         // The "hint" argument is always ignored in NFS_Allocate thus const_cast shouldn't hurt
    00083         return pointer(internal::NFS_Allocate( n, sizeof(value_type), const_cast<void*>(hint) ));
    00084     }
    00085
    00087     void deallocate( pointer p, size_type ) {
    00088         internal::NFS_Free(p);
    00089     }
    00090
    00092     size_type max_size() const throw() {
    00093         return (~size_t(0)-internal::NFS_MaxLineSize)/sizeof(value_type);
    00094     }
    00095
    00097 #if __TBB_CPP11_VARIADIC_TEMPLATES_PRESENT && __TBB_CPP11_RVALUE_REF_PRESENT
    00098     template<typename... Args>
    00099     void construct(pointer p, Args&&... args)
    00100  #if __TBB_CPP11_STD_FORWARD_BROKEN
    00101         { ::new((void *)p) T((args)...); }
    00102  #else
    00103         { ::new((void *)p) T(std::forward<Args>(args)...); }
    00104  #endif
    00105 #else // __TBB_CPP11_VARIADIC_TEMPLATES_PRESENT && __TBB_CPP11_RVALUE_REF_PRESENT
    00106     void construct( pointer p, const value_type& value ) {::new((void*)(p)) value_type(value);}
    00107 #endif // __TBB_CPP11_VARIADIC_TEMPLATES_PRESENT && __TBB_CPP11_RVALUE_REF_PRESENT
    00108
    00110     void destroy( pointer p ) {p->~value_type();}
    00111 };
    00112
    00113 #if _MSC_VER && !defined(__INTEL_COMPILER)
    00114     #pragma warning (pop)
    00115 #endif // warning 4100 is back
    00116
    00118
    00119 template<>
    00120 class cache_aligned_allocator<void> {
    00121 public:
    00122     typedef void* pointer;
    00123     typedef const void* const_pointer;
    00124     typedef void value_type;
    00125     template<typename U> struct rebind {
    00126         typedef cache_aligned_allocator<U> other;
    00127     };
    00128 };
    00129
    00130 template<typename T, typename U>
    00131 inline bool operator==( const cache_aligned_allocator<T>&, const cache_aligned_allocator<U>& ) {return true;}
    00132
    00133 template<typename T, typename U>
    00134 inline bool operator!=( const cache_aligned_allocator<T>&, const cache_aligned_allocator<U>& ) {return false;}
    00135
    00136 } // namespace tbb
    00137
    00138 #endif /* __TBB_cache_aligned_allocator_H */

Copyright © 2005-2012 Intel Corporation. All Rights Reserved.

Intel, Pentium, Intel Xeon, Itanium, Intel XScale and VTune are registered trademarks or trademarks of Intel Corporation or its subsidiaries in the United States and other countries.

* Other names and brands may be claimed as the property of others.