ceph/src/boost/libs/multi_index/include/boost/multi_index/detail/hash_index_iterator.hpp

   1 /* Copyright 2003-2014 Joaquin M Lopez Munoz.
   2  * Distributed under the Boost Software License, Version 1.0.
   3  * (See accompanying file LICENSE_1_0.txt or copy at
   4  * http://www.boost.org/LICENSE_1_0.txt)
   5  *
   6  * See http://www.boost.org/libs/multi_index for library home page.
   7  */
   8
   9 #ifndef BOOST_MULTI_INDEX_DETAIL_HASH_INDEX_ITERATOR_HPP
  10 #define BOOST_MULTI_INDEX_DETAIL_HASH_INDEX_ITERATOR_HPP
  11
  12 #if defined(_MSC_VER)
  13 #pragma once
  14 #endif
  15
  16 #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
  17 #include <boost/operators.hpp>
  18
  19 #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
  20 #include <boost/serialization/nvp.hpp>
  21 #include <boost/serialization/split_member.hpp>
  22 #include <boost/serialization/version.hpp>
  23 #endif
  24
  25 namespace boost{
  26
  27 namespace multi_index{
  28
  29 namespace detail{
  30
  31 /* Iterator class for hashed indices.
  32  */
  33
  34 struct hashed_index_global_iterator_tag{};
  35 struct hashed_index_local_iterator_tag{};
  36
  37 template<typename Node,typename BucketArray,typename Category>
  38 class hashed_index_iterator:
  39   public forward_iterator_helper<
  40     hashed_index_iterator<Node,BucketArray,Category>,
  41     typename Node::value_type,
  42     std::ptrdiff_t,
  43     const typename Node::value_type*,
  44     const typename Node::value_type&>
  45 {
  46 public:
  47   /* coverity[uninit_ctor]: suppress warning */
  48   hashed_index_iterator(){}
  49   hashed_index_iterator(Node* node_):node(node_){}
  50
  51   const typename Node::value_type& operator*()const
  52   {
  53     return node->value();
  54   }
  55
  56   hashed_index_iterator& operator++()
  57   {
  58     this->increment(Category());
  59     return *this;
  60   }
  61
  62 #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
  63   /* Serialization. As for why the following is public,
  64    * see explanation in safe_mode_iterator notes in safe_mode.hpp.
  65    */
  66
  67   BOOST_SERIALIZATION_SPLIT_MEMBER()
  68
  69   typedef typename Node::base_type node_base_type;
  70
  71   template<class Archive>
  72   void save(Archive& ar,const unsigned int)const
  73   {
  74     node_base_type* bnode=node;
  75     ar<<serialization::make_nvp("pointer",bnode);
  76   }
  77
  78   template<class Archive>
  79   void load(Archive& ar,const unsigned int version)
  80   {
  81     load(ar,version,Category());
  82   }
  83
  84   template<class Archive>
  85   void load(
  86     Archive& ar,const unsigned int version,hashed_index_global_iterator_tag)
  87   {
  88     node_base_type* bnode;
  89     ar>>serialization::make_nvp("pointer",bnode);
  90     node=static_cast<Node*>(bnode);
  91     if(version<1){
  92       BucketArray* throw_away; /* consume unused ptr */
  93       ar>>serialization::make_nvp("pointer",throw_away);
  94     }
  95   }
  96
  97   template<class Archive>
  98   void load(
  99     Archive& ar,const unsigned int version,hashed_index_local_iterator_tag)
 100   {
 101     node_base_type* bnode;
 102     ar>>serialization::make_nvp("pointer",bnode);
 103     node=static_cast<Node*>(bnode);
 104     if(version<1){
 105       BucketArray* buckets;
 106       ar>>serialization::make_nvp("pointer",buckets);
 107       if(buckets&&node&&node->impl()==buckets->end()->prior()){
 108         /* end local_iterators used to point to end node, now they are null */
 109         node=0;
 110       }
 111     }
 112   }
 113 #endif
 114
 115   /* get_node is not to be used by the user */
 116
 117   typedef Node node_type;
 118
 119   Node* get_node()const{return node;}
 120
 121 private:
 122
 123   void increment(hashed_index_global_iterator_tag)
 124   {
 125     Node::increment(node);
 126   }
 127
 128   void increment(hashed_index_local_iterator_tag)
 129   {
 130     Node::increment_local(node);
 131   }
 132
 133   Node* node;
 134 };
 135
 136 template<typename Node,typename BucketArray,typename Category>
 137 bool operator==(
 138   const hashed_index_iterator<Node,BucketArray,Category>& x,
 139   const hashed_index_iterator<Node,BucketArray,Category>& y)
 140 {
 141   return x.get_node()==y.get_node();
 142 }
 143
 144 } /* namespace multi_index::detail */
 145
 146 } /* namespace multi_index */
 147
 148 #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
 149 /* class version = 1 : hashed_index_iterator does no longer serialize a bucket
 150  * array pointer.
 151  */
 152
 153 namespace serialization {
 154 template<typename Node,typename BucketArray,typename Category>
 155 struct version<
 156   boost::multi_index::detail::hashed_index_iterator<Node,BucketArray,Category>
 157 >
 158 {
 159   BOOST_STATIC_CONSTANT(int,value=1);
 160 };
 161 } /* namespace serialization */
 162 #endif
 163
 164 } /* namespace boost */
 165
 166 #endif