ceph/src/boost/boost/intrusive/member_value_traits.hpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga  2006-2013
   4 //
   5 // Distributed under the Boost Software License, Version 1.0.
   6 //    (See accompanying file LICENSE_1_0.txt or copy at
   7 //          http://www.boost.org/LICENSE_1_0.txt)
   8 //
   9 // See http://www.boost.org/libs/intrusive for documentation.
  10 //
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #ifndef BOOST_INTRUSIVE_MEMBER_VALUE_TRAITS_HPP
  14 #define BOOST_INTRUSIVE_MEMBER_VALUE_TRAITS_HPP
  15
  16 #include <boost/intrusive/detail/config_begin.hpp>
  17 #include <boost/intrusive/intrusive_fwd.hpp>
  18
  19 #include <boost/intrusive/link_mode.hpp>
  20 #include <boost/intrusive/detail/parent_from_member.hpp>
  21 #include <boost/move/detail/to_raw_pointer.hpp>
  22 #include <boost/intrusive/pointer_traits.hpp>
  23
  24 #if defined(BOOST_HAS_PRAGMA_ONCE)
  25 #  pragma once
  26 #endif
  27
  28 namespace boost {
  29 namespace intrusive {
  30
  31 //!This value traits template is used to create value traits
  32 //!from user defined node traits where value_traits::value_type will
  33 //!store a node_traits::node
  34 template< class T, class NodeTraits
  35         , typename NodeTraits::node T::* PtrToMember
  36         , link_mode_type LinkMode
  37    #ifdef BOOST_INTRUSIVE_DOXYGEN_INVOKED
  38    = safe_link
  39    #endif
  40 >
  41 struct member_value_traits
  42 {
  43    public:
  44    typedef NodeTraits                                                   node_traits;
  45    typedef T                                                            value_type;
  46    typedef typename node_traits::node                                   node;
  47    typedef typename node_traits::node_ptr                               node_ptr;
  48    typedef typename node_traits::const_node_ptr                         const_node_ptr;
  49    typedef pointer_traits<node_ptr>                                     node_ptr_traits;
  50    typedef typename pointer_traits<node_ptr>::template
  51       rebind_pointer<T>::type                                           pointer;
  52    typedef typename pointer_traits<node_ptr>::template
  53       rebind_pointer<const T>::type                                     const_pointer;
  54    //typedef typename pointer_traits<pointer>::reference                  reference;
  55    //typedef typename pointer_traits<const_pointer>::reference            const_reference;
  56    typedef value_type &                                                 reference;
  57    typedef const value_type &                                           const_reference;
  58    static const link_mode_type link_mode = LinkMode;
  59
  60    BOOST_INTRUSIVE_FORCEINLINE static node_ptr to_node_ptr(reference value)
  61    {  return pointer_traits<node_ptr>::pointer_to(value.*PtrToMember);   }
  62
  63    BOOST_INTRUSIVE_FORCEINLINE static const_node_ptr to_node_ptr(const_reference value)
  64    {  return pointer_traits<const_node_ptr>::pointer_to(value.*PtrToMember);   }
  65
  66    BOOST_INTRUSIVE_FORCEINLINE static pointer to_value_ptr(const node_ptr &n)
  67    {
  68       return pointer_traits<pointer>::pointer_to(*detail::parent_from_member<value_type, node>
  69          (boost::movelib::to_raw_pointer(n), PtrToMember));
  70    }
  71
  72    BOOST_INTRUSIVE_FORCEINLINE static const_pointer to_value_ptr(const const_node_ptr &n)
  73    {
  74       return pointer_traits<const_pointer>::pointer_to(*detail::parent_from_member<value_type, node>
  75          (boost::movelib::to_raw_pointer(n), PtrToMember));
  76
  77    }
  78 };
  79
  80 } //namespace intrusive
  81 } //namespace boost
  82
  83 #include <boost/intrusive/detail/config_end.hpp>
  84
  85 #endif //BOOST_INTRUSIVE_MEMBER_VALUE_TRAITS_HPP