concurrent_unordered_map.h Source File

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# concurrent_unordered_map.h

    00001 /*
    00002     Copyright 2005-2010 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 /* Container implementations in this header are based on PPL implementations
    00022    provided by Microsoft. */
    00023
    00024 #ifndef __TBB_concurrent_unordered_map_H
    00025 #define __TBB_concurrent_unordered_map_H
    00026
    00027 #include "_concurrent_unordered_internal.h"
    00028
    00029 namespace tbb
    00030 {
    00031
    00032 // Template class for hash compare
    00033 template<typename Key>
    00034 class tbb_hash
    00035 {
    00036 public:
    00037     tbb_hash() {}
    00038
    00039     size_t operator()(const Key& key) const
    00040     {
    00041         return tbb_hasher(key);
    00042     }
    00043 };
    00044
    00045 namespace interface5 {
    00046
    00047 // Template class for hash map traits
    00048 template<typename Key, typename T, typename Hash_compare, typename Allocator, bool Allow_multimapping>
    00049 class concurrent_unordered_map_traits
    00050 {
    00051 protected:
    00052     typedef std::pair<const Key, T> value_type;
    00053     typedef Key key_type;
    00054     typedef Hash_compare hash_compare;
    00055     typedef typename Allocator::template rebind<value_type>::other allocator_type;
    00056     enum { allow_multimapping = Allow_multimapping };
    00057
    00058     concurrent_unordered_map_traits() : my_hash_compare() {}
    00059     concurrent_unordered_map_traits(const hash_compare& hc) : my_hash_compare(hc) {}
    00060
    00061     class value_compare : public std::binary_function<value_type, value_type, bool>
    00062     {
    00063         friend class concurrent_unordered_map_traits<Key, T, Hash_compare, Allocator, Allow_multimapping>;
    00064
    00065     public:
    00066         bool operator()(const value_type& left, const value_type& right) const
    00067         {
    00068             return (my_hash_compare(left.first, right.first));
    00069         }
    00070
    00071         value_compare(const hash_compare& comparator) : my_hash_compare(comparator) {}
    00072
    00073     protected:
    00074         hash_compare my_hash_compare;    // the comparator predicate for keys
    00075     };
    00076
    00077     template<class Type1, class Type2>
    00078     static const Key& get_key(const std::pair<Type1, Type2>& value) {
    00079         return (value.first);
    00080     }
    00081
    00082     hash_compare my_hash_compare; // the comparator predicate for keys
    00083 };
    00084
    00085 template <typename Key, typename T, typename Hasher = tbb_hash<Key>, typename Key_equality = std::equal_to<Key>, typename Allocator = tbb::tbb_allocator<std::pair<const Key, T> > >
    00086 class concurrent_unordered_map : public internal::concurrent_unordered_base< concurrent_unordered_map_traits<Key, T, internal::hash_compare<Key, Hasher, Key_equality>, Allocator, false> >
    00087 {
    00088     // Base type definitions
    00089     typedef internal::hash_compare<Key, Hasher, Key_equality> hash_compare;
    00090     typedef internal::concurrent_unordered_base< concurrent_unordered_map_traits<Key, T, hash_compare, Allocator, false> > base_type;
    00091     typedef concurrent_unordered_map_traits<Key, T, internal::hash_compare<Key, Hasher, Key_equality>, Allocator, false> traits_type;
    00092     using traits_type::my_hash_compare;
    00093 #if __TBB_EXTRA_DEBUG
    00094 public:
    00095 #endif
    00096     using traits_type::allow_multimapping;
    00097 public:
    00098     using base_type::end;
    00099     using base_type::find;
    00100     using base_type::insert;
    00101
    00102     // Type definitions
    00103     typedef Key key_type;
    00104     typedef typename base_type::value_type value_type;
    00105     typedef T mapped_type;
    00106     typedef Hasher hasher;
    00107     typedef Key_equality key_equal;
    00108     typedef hash_compare key_compare;
    00109
    00110     typedef typename base_type::allocator_type allocator_type;
    00111     typedef typename base_type::pointer pointer;
    00112     typedef typename base_type::const_pointer const_pointer;
    00113     typedef typename base_type::reference reference;
    00114     typedef typename base_type::const_reference const_reference;
    00115
    00116     typedef typename base_type::size_type size_type;
    00117     typedef typename base_type::difference_type difference_type;
    00118
    00119     typedef typename base_type::iterator iterator;
    00120     typedef typename base_type::const_iterator const_iterator;
    00121     typedef typename base_type::iterator local_iterator;
    00122     typedef typename base_type::const_iterator const_local_iterator;
    00123
    00124     // Construction/destruction/copying
    00125     explicit concurrent_unordered_map(size_type n_of_buckets = 8, const hasher& a_hasher = hasher(),
    00126         const key_equal& a_keyeq = key_equal(), const allocator_type& a = allocator_type())
    00127         : base_type(n_of_buckets, key_compare(a_hasher, a_keyeq), a)
    00128     {
    00129     }
    00130
    00131     concurrent_unordered_map(const Allocator& a) : base_type(8, key_compare(), a)
    00132     {
    00133     }
    00134
    00135     template <typename Iterator>
    00136     concurrent_unordered_map(Iterator first, Iterator last, size_type n_of_buckets = 8, const hasher& a_hasher = hasher(),
    00137         const key_equal& a_keyeq = key_equal(), const allocator_type& a = allocator_type())
    00138         : base_type(n_of_buckets, key_compare(a_hasher, a_keyeq), a)
    00139     {
    00140         for (; first != last; ++first)
    00141             base_type::insert(*first);
    00142     }
    00143
    00144     concurrent_unordered_map(const concurrent_unordered_map& table) : base_type(table)
    00145     {
    00146     }
    00147
    00148     concurrent_unordered_map(const concurrent_unordered_map& table, const Allocator& a)
    00149         : base_type(table, a)
    00150     {
    00151     }
    00152
    00153     concurrent_unordered_map& operator=(const concurrent_unordered_map& table)
    00154     {
    00155         base_type::operator=(table);
    00156         return (*this);
    00157     }
    00158
    00159     iterator unsafe_erase(const_iterator where)
    00160     {
    00161         return base_type::unsafe_erase(where);
    00162     }
    00163
    00164     size_type unsafe_erase(const key_type& key)
    00165     {
    00166         return base_type::unsafe_erase(key);
    00167     }
    00168
    00169     iterator unsafe_erase(const_iterator first, const_iterator last)
    00170     {
    00171         return base_type::unsafe_erase(first, last);
    00172     }
    00173
    00174     void swap(concurrent_unordered_map& table)
    00175     {
    00176         base_type::swap(table);
    00177     }
    00178
    00179     // Observers
    00180     hasher hash_function() const
    00181     {
    00182         return my_hash_compare.my_hash_object;
    00183     }
    00184
    00185     key_equal key_eq() const
    00186     {
    00187         return my_hash_compare.my_key_compare_object;
    00188     }
    00189
    00190     mapped_type& operator[](const key_type& key)
    00191     {
    00192         iterator where = find(key);
    00193
    00194         if (where == end())
    00195         {
    00196             where = insert(std::pair<key_type, mapped_type>(key, mapped_type())).first;
    00197         }
    00198
    00199         return ((*where).second);
    00200     }
    00201
    00202     mapped_type& at(const key_type& key)
    00203     {
    00204         iterator where = find(key);
    00205
    00206         if (where == end())
    00207         {
    00208             tbb::internal::throw_exception(tbb::internal::eid_invalid_key);
    00209         }
    00210
    00211         return ((*where).second);
    00212     }
    00213
    00214     const mapped_type& at(const key_type& key) const
    00215     {
    00216         const_iterator where = find(key);
    00217
    00218         if (where == end())
    00219         {
    00220             tbb::internal::throw_exception(tbb::internal::eid_invalid_key);
    00221         }
    00222
    00223         return ((*where).second);
    00224     }
    00225 };
    00226
    00227 } // namespace interface5
    00228
    00229 using interface5::concurrent_unordered_map;
    00230
    00231 } // namespace tbb
    00232
    00233 #endif// __TBB_concurrent_unordered_map_H

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