// -*- C++ -*-
-// Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+// Copyright (C) 2005-2014 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License as published by the Free Software
-// Foundation; either version 2, or (at your option) any later
+// Foundation; either version 3, or (at your option) any later
// version.
// This library is distributed in the hope that it will be useful, but
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
-// You should have received a copy of the GNU General Public License
-// along with this library; see the file COPYING. If not, write to
-// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
-// MA 02111-1307, USA.
-
-// As a special exception, you may use this file as part of a free
-// software library without restriction. Specifically, if other files
-// instantiate templates or use macros or inline functions from this
-// file, or you compile this file and link it with other files to
-// produce an executable, this file does not by itself cause the
-// resulting executable to be covered by the GNU General Public
-// License. This exception does not however invalidate any other
-// reasons why the executable file might be covered by the GNU General
-// Public License.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
#ifndef PB_DS_LU_POLICY_HPP
#define PB_DS_LU_POLICY_HPP
-#include <ext/pb_ds/detail/list_update_policy/counter_lu_metadata.hpp>
+#include <bits/c++config.h>
+#include <cstdlib>
+#include <ext/pb_ds/detail/list_update_policy/lu_counter_metadata.hpp>
+#include <ext/pb_ds/tag_and_trait.hpp>
-namespace pb_ds
+namespace __gnu_pbds
{
- // A null type that means that each link in a list-based container
- // does not actually need metadata.
- struct null_lu_metadata
- { };
-
-#define PB_DS_CLASS_T_DEC template<typename Allocator>
-#define PB_DS_CLASS_C_DEC move_to_front_lu_policy<Allocator>
-
- // A list-update policy that unconditionally moves elements to the
- // front of the list.
- template<typename Allocator = std::allocator<char> >
- class move_to_front_lu_policy
- {
- public:
- typedef Allocator allocator;
-
- // Metadata on which this functor operates.
- typedef null_lu_metadata metadata_type;
-
- // Reference to metadata on which this functor operates.
- typedef typename allocator::template rebind<metadata_type>::other metadata_rebind;
- typedef typename metadata_rebind::reference metadata_reference;
-
- // Creates a metadata object.
- metadata_type
- operator()() const;
-
- // Decides whether a metadata object should be moved to the front of the list.
- inline bool
- operator()(metadata_reference r_metadata) const;
-
- private:
- static null_lu_metadata s_metadata;
- };
-
-#include <ext/pb_ds/detail/list_update_policy/mtf_lu_policy_imp.hpp>
-
-#undef PB_DS_CLASS_T_DEC
-#undef PB_DS_CLASS_C_DEC
-
-#define PB_DS_CLASS_T_DEC template<size_t Max_Count, class Allocator>
-#define PB_DS_CLASS_C_DEC counter_lu_policy<Max_Count, Allocator>
-
- // A list-update policy that moves elements to the front of the list based on the counter algorithm.
- template<size_t Max_Count = 5, typename Allocator = std::allocator<char> >
- class counter_lu_policy
- : private detail::counter_lu_policy_base<typename Allocator::size_type>
- {
- public:
- typedef Allocator allocator;
-
- enum
- {
- max_count = Max_Count
- };
-
- typedef typename allocator::size_type size_type;
-
- // Metadata on which this functor operates.
- typedef detail::counter_lu_metadata<size_type> metadata_type;
-
- // Reference to metadata on which this functor operates.
- typedef typename Allocator::template rebind<metadata_type>::other metadata_rebind;
- typedef typename metadata_rebind::reference metadata_reference;
-
- // Creates a metadata object.
- metadata_type
- operator()() const;
-
- // Decides whether a metadata object should be moved to the front of the list.
- bool
- operator()(metadata_reference r_metadata) const;
-
- private:
- typedef detail::counter_lu_policy_base<typename Allocator::size_type> base_type;
- };
-
-#include <ext/pb_ds/detail/list_update_policy/counter_lu_policy_imp.hpp>
-
-#undef PB_DS_CLASS_T_DEC
-#undef PB_DS_CLASS_C_DEC
-
-} // namespace pb_ds
+ /**
+ * A list-update policy that unconditionally moves elements to the
+ * front of the list. A null type means that each link in a
+ * list-based container does not actually need metadata.
+ */
+ template<typename _Alloc = std::allocator<char> >
+ class lu_move_to_front_policy
+ {
+ public:
+ typedef _Alloc allocator_type;
+
+ /// Metadata on which this functor operates.
+ typedef null_type metadata_type;
+
+ private:
+ typedef typename _Alloc::template rebind<metadata_type> __rebind_m;
+
+ public:
+ /// Reference to metadata on which this functor operates.
+ typedef typename __rebind_m::other::reference metadata_reference;
+
+ /// Creates a metadata object.
+ metadata_type
+ operator()() const
+ { return s_metadata; }
+
+ /// Decides whether a metadata object should be moved to the front
+ /// of the list.
+ inline bool
+ operator()(metadata_reference r_metadata) const
+ { return true; }
+
+ private:
+ static null_type s_metadata;
+ };
+
+ /**
+ * A list-update policy that moves elements to the front of the
+ * list based on the counter algorithm.
+ */
+ template<std::size_t Max_Count = 5, typename _Alloc = std::allocator<char> >
+ class lu_counter_policy
+ : private detail::lu_counter_policy_base<typename _Alloc::size_type>
+ {
+ public:
+ typedef _Alloc allocator_type;
+ typedef typename allocator_type::size_type size_type;
+
+ enum
+ {
+ /// When some element is accessed this number of times, it
+ /// will be moved to the front of the list.
+ max_count = Max_Count
+ };
+
+ /// Metadata on which this functor operates.
+ typedef detail::lu_counter_metadata<size_type> metadata_type;
+
+ private:
+ typedef detail::lu_counter_policy_base<size_type> base_type;
+ typedef typename _Alloc::template rebind<metadata_type> __rebind_m;
+
+ public:
+ /// Reference to metadata on which this functor operates.
+ typedef typename __rebind_m::other::reference metadata_reference;
+
+ /// Creates a metadata object.
+ metadata_type
+ operator()() const
+ { return base_type::operator()(max_count); }
+
+ /// Decides whether a metadata object should be moved to the front
+ /// of the list.
+ bool
+ operator()(metadata_reference r_data) const
+ { return base_type::operator()(r_data, max_count); }
+ };
+} // namespace __gnu_pbds
#endif
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