old-autovect-branch/libstdc++-v3/include/ext/pb_assoc/lu_policy.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  31
  32 // Permission to use, copy, modify, sell, and distribute this software
  33 // is hereby granted without fee, provided that the above copyright
  34 // notice appears in all copies, and that both that copyright notice and
  35 // this permission notice appear in supporting documentation. None of
  36 // the above authors, nor IBM Haifa Research Laboratories, make any
  37 // representation about the suitability of this software for any
  38 // purpose. It is provided "as is" without express or implied warranty.
  39
  40 /**
  41  * @file lu_policy.hpp
  42  * Contains policies for list update containers.
  43  */
  44
  45 #ifndef LU_POLICY_HPP
  46 #define LU_POLICY_HPP
  47
  48 namespace pb_assoc
  49 {
  50   struct move_to_front_lu_metadata
  51   { };
  52
  53 #define PB_ASSOC_CLASS_T_DEC \
  54         template<typename Metadata_Reference>
  55
  56 #define PB_ASSOC_CLASS_C_DEC \
  57         move_to_front_lu_policy<Metadata_Reference>
  58
  59   template<typename Metadata_Reference =
  60            std::allocator<move_to_front_lu_metadata>::reference>
  61     class move_to_front_lu_policy
  62     {
  63     public:
  64       void
  65       swap(PB_ASSOC_CLASS_C_DEC& r_other);
  66
  67     protected:
  68       typedef move_to_front_lu_metadata metadata_type;
  69
  70       typedef Metadata_Reference metadata_reference;
  71
  72       metadata_type
  73       operator()() const;
  74
  75       inline bool
  76       operator()(metadata_reference r_data) const;
  77     };
  78
  79 #include <ext/pb_assoc/detail/lu_policy/mtf_lu_policy_imp.hpp>
  80
  81 #undef PB_ASSOC_CLASS_T_DEC
  82
  83 #undef PB_ASSOC_CLASS_C_DEC
  84
  85   template<typename Size_Type>
  86     class counter_lu_policy_base;
  87
  88   template<typename Size_Type = size_t>
  89     class counter_lu_metadata
  90     {
  91     public:
  92       typedef Size_Type size_type;
  93
  94   private:
  95       counter_lu_metadata(size_type init_count) : m_count(init_count)
  96       { }
  97
  98       mutable size_type m_count;
  99
 100       friend class counter_lu_policy_base<Size_Type>;
 101     };
 102
 103   template<typename Size_Type>
 104     class counter_lu_policy_base;
 105
 106 #define PB_ASSOC_CLASS_T_DEC \
 107         template<typename Size_Type>
 108
 109 #define PB_ASSOC_CLASS_C_DEC \
 110         counter_lu_policy_base<Size_Type>
 111
 112   template<typename Size_Type>
 113     class counter_lu_policy_base
 114     {
 115     protected:
 116       typedef Size_Type size_type;
 117
 118     counter_lu_metadata<Size_Type>
 119     operator()(size_type max_size) const;
 120
 121     template<typename Metadata_Reference>
 122       bool
 123       operator()(Metadata_Reference r_data, size_type m_max_count) const;
 124     };
 125
 126 #include <ext/pb_assoc/detail/lu_policy/counter_lu_metadata_imp.hpp>
 127
 128 #undef PB_ASSOC_CLASS_T_DEC
 129
 130 #undef PB_ASSOC_CLASS_C_DEC
 131
 132 #define PB_ASSOC_CLASS_T_DEC \
 133         template<typename Size_Type, typename Metadata_Reference>
 134
 135 #define PB_ASSOC_CLASS_C_DEC \
 136         counter_lu_policy<Size_Type, Metadata_Reference>
 137
 138   template<typename Size_Type = size_t,
 139            typename Metadata_Reference =
 140            typename std::allocator<counter_lu_metadata<Size_Type> >::reference>
 141     class counter_lu_policy : private counter_lu_policy_base<Size_Type>
 142     {
 143     public:
 144       typedef Size_Type size_type;
 145
 146       counter_lu_policy(size_type max_count = 5);
 147
 148       void
 149       swap(PB_ASSOC_CLASS_C_DEC& r_other);
 150
 151       inline
 152       size_type
 153       get_max_count() const;
 154
 155     protected:
 156
 157       typedef counter_lu_metadata< Size_Type> metadata_type;
 158
 159       typedef Metadata_Reference metadata_reference;
 160
 161       metadata_type
 162       operator()() const;
 163
 164       bool
 165       operator()(metadata_reference r_data) const;
 166
 167     private:
 168       typedef counter_lu_policy_base< Size_Type> my_base;
 169
 170       size_type m_max_count;
 171     };
 172
 173 #include <ext/pb_assoc/detail/lu_policy/counter_lu_policy_imp.hpp>
 174
 175 #undef PB_ASSOC_CLASS_T_DEC
 176
 177 #undef PB_ASSOC_CLASS_C_DEC
 178
 179 } // namespace pb_assoc
 180
 181 #endif // #ifndef LU_POLICY_HPP