00001 // -*- C++ -*- 00002 00003 // Copyright (C) 2005 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 2, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // You should have received a copy of the GNU General Public License along 00017 // with this library; see the file COPYING. If not, write to the Free 00018 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 00019 // USA. 00020 00021 // As a special exception, you may use this file as part of a free software 00022 // library without restriction. Specifically, if other files instantiate 00023 // templates or use macros or inline functions from this file, or you compile 00024 // this file and link it with other files to produce an executable, this 00025 // file does not by itself cause the resulting executable to be covered by 00026 // the GNU General Public License. This exception does not however 00027 // invalidate any other reasons why the executable file might be covered by 00028 // the GNU General Public License. 00029 00030 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 00031 00032 // Permission to use, copy, modify, sell, and distribute this software 00033 // is hereby granted without fee, provided that the above copyright 00034 // notice appears in all copies, and that both that copyright notice and 00035 // this permission notice appear in supporting documentation. None of 00036 // the above authors, nor IBM Haifa Research Laboratories, make any 00037 // representation about the suitability of this software for any 00038 // purpose. It is provided "as is" without express or implied warranty. 00039 00045 #ifndef LU_POLICY_HPP 00046 #define LU_POLICY_HPP 00047 00048 namespace pb_assoc 00049 { 00050 struct move_to_front_lu_metadata 00051 { }; 00052 00053 #define PB_ASSOC_CLASS_T_DEC \ 00054 template<typename Metadata_Reference> 00055 00056 #define PB_ASSOC_CLASS_C_DEC \ 00057 move_to_front_lu_policy<Metadata_Reference> 00058 00059 template<typename Metadata_Reference = 00060 std::allocator<move_to_front_lu_metadata>::reference> 00061 class move_to_front_lu_policy 00062 { 00063 public: 00064 void 00065 swap(PB_ASSOC_CLASS_C_DEC& r_other); 00066 00067 protected: 00068 typedef move_to_front_lu_metadata metadata_type; 00069 00070 typedef Metadata_Reference metadata_reference; 00071 00072 metadata_type 00073 operator()() const; 00074 00075 inline bool 00076 operator()(metadata_reference r_data) const; 00077 }; 00078 00079 #include <ext/pb_assoc/detail/lu_policy/mtf_lu_policy_imp.hpp> 00080 00081 #undef PB_ASSOC_CLASS_T_DEC 00082 00083 #undef PB_ASSOC_CLASS_C_DEC 00084 00085 template<typename Size_Type> 00086 class counter_lu_policy_base; 00087 00088 template<typename Size_Type = size_t> 00089 class counter_lu_metadata 00090 { 00091 public: 00092 typedef Size_Type size_type; 00093 00094 private: 00095 counter_lu_metadata(size_type init_count) : m_count(init_count) 00096 { } 00097 00098 mutable size_type m_count; 00099 00100 friend class counter_lu_policy_base<Size_Type>; 00101 }; 00102 00103 template<typename Size_Type> 00104 class counter_lu_policy_base; 00105 00106 #define PB_ASSOC_CLASS_T_DEC \ 00107 template<typename Size_Type> 00108 00109 #define PB_ASSOC_CLASS_C_DEC \ 00110 counter_lu_policy_base<Size_Type> 00111 00112 template<typename Size_Type> 00113 class counter_lu_policy_base 00114 { 00115 protected: 00116 typedef Size_Type size_type; 00117 00118 counter_lu_metadata<Size_Type> 00119 operator()(size_type max_size) const; 00120 00121 template<typename Metadata_Reference> 00122 bool 00123 operator()(Metadata_Reference r_data, size_type m_max_count) const; 00124 }; 00125 00126 #include <ext/pb_assoc/detail/lu_policy/counter_lu_metadata_imp.hpp> 00127 00128 #undef PB_ASSOC_CLASS_T_DEC 00129 00130 #undef PB_ASSOC_CLASS_C_DEC 00131 00132 #define PB_ASSOC_CLASS_T_DEC \ 00133 template<typename Size_Type, typename Metadata_Reference> 00134 00135 #define PB_ASSOC_CLASS_C_DEC \ 00136 counter_lu_policy<Size_Type, Metadata_Reference> 00137 00138 template<typename Size_Type = size_t, 00139 typename Metadata_Reference = 00140 typename std::allocator<counter_lu_metadata<Size_Type> >::reference> 00141 class counter_lu_policy : private counter_lu_policy_base<Size_Type> 00142 { 00143 public: 00144 typedef Size_Type size_type; 00145 00146 counter_lu_policy(size_type max_count = 5); 00147 00148 void 00149 swap(PB_ASSOC_CLASS_C_DEC& r_other); 00150 00151 inline 00152 size_type 00153 get_max_count() const; 00154 00155 protected: 00156 00157 typedef counter_lu_metadata< Size_Type> metadata_type; 00158 00159 typedef Metadata_Reference metadata_reference; 00160 00161 metadata_type 00162 operator()() const; 00163 00164 bool 00165 operator()(metadata_reference r_data) const; 00166 00167 private: 00168 typedef counter_lu_policy_base< Size_Type> my_base; 00169 00170 size_type m_max_count; 00171 }; 00172 00173 #include <ext/pb_assoc/detail/lu_policy/counter_lu_policy_imp.hpp> 00174 00175 #undef PB_ASSOC_CLASS_T_DEC 00176 00177 #undef PB_ASSOC_CLASS_C_DEC 00178 00179 } // namespace pb_assoc 00180 00181 #endif // #ifndef LU_POLICY_HPP