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tbb_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_tbb_allocator_H
00022 #define __TBB_tbb_allocator_H
00023 
00024 #include <new>
00025 #include "tbb_stddef.h"
00026 
00027 namespace tbb {
00028 
00030 namespace internal {
00031 
00033 
00034     void deallocate_via_handler_v3( void *p );
00035 
00037 
00038     void* allocate_via_handler_v3( size_t n );
00039 
00041     bool is_malloc_used_v3();
00042 }
00044 
00046 
00051 template<typename T>
00052 class tbb_allocator {
00053 public:
00054     typedef T* pointer;
00055     typedef const T* const_pointer;
00056     typedef T& reference;
00057     typedef const T& const_reference;
00058     typedef T value_type;
00059     typedef size_t size_type;
00060     typedef ptrdiff_t difference_type;
00061     template<typename U> struct rebind {
00062         typedef tbb_allocator<U> other;
00063     };
00064 
00066     enum malloc_type {
00067         scalable, 
00068         standard
00069     };
00070 
00071 #if _WIN64
00072 
00073 
00075     char* _Charalloc( size_type size ) {        
00076         return (char*)(internal::allocate_via_handler_v3( size * sizeof(T)));
00077     }
00078 #endif /* _WIN64 */
00079 
00080     tbb_allocator() throw() {}
00081     tbb_allocator( const tbb_allocator& ) throw() {}
00082     template<typename U> tbb_allocator(const tbb_allocator<U>&) throw() {}
00083 
00084     pointer address(reference x) const {return &x;}
00085     const_pointer address(const_reference x) const {return &x;}
00086     
00088     pointer allocate( size_type n, const void* /*hint*/ = 0) {
00089         return pointer(internal::allocate_via_handler_v3( n * sizeof(T) ));
00090     }
00091 
00093     void deallocate( pointer p, size_type ) {
00094         internal::deallocate_via_handler_v3(p);        
00095     }
00096 
00098     size_type max_size() const throw() {
00099         size_type max = static_cast<size_type>(-1) / sizeof (T);
00100         return (max > 0 ? max : 1);
00101     }
00102     
00104     void construct( pointer p, const T& value ) {new(static_cast<void*>(p)) T(value);}
00105 
00107     void destroy( pointer p ) {p->~T();}
00108 
00110     static malloc_type allocator_type() {
00111         return internal::is_malloc_used_v3() ? standard : scalable;
00112     }
00113 };
00114 
00116 
00117 template<> 
00118 class tbb_allocator<void> {
00119 public:
00120     typedef void* pointer;
00121     typedef const void* const_pointer;
00122     typedef void value_type;
00123     template<typename U> struct rebind {
00124         typedef tbb_allocator<U> other;
00125     };
00126 };
00127 
00128 template<typename T, typename U>
00129 inline bool operator==( const tbb_allocator<T>&, const tbb_allocator<U>& ) {return true;}
00130 
00131 template<typename T, typename U>
00132 inline bool operator!=( const tbb_allocator<T>&, const tbb_allocator<U>& ) {return false;}
00133 
00134 } // namespace ThreadBuildingBlocks 
00135 
00136 #endif /* __TBB_tbb_allocator_H */

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

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