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include/boost/container/detail/node_alloc_holder.hpp  view on Meta::CPAN

#include <boost/container/detail/version_type.hpp>
// intrusive
#include <boost/intrusive/detail/mpl.hpp>
#include <boost/intrusive/options.hpp>
// move
#include <boost/move/utility_core.hpp>
#if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
#include <boost/move/detail/fwd_macros.hpp>
#endif
// other
#include <boost/core/no_exceptions_support.hpp>


namespace boost {
namespace container {
namespace dtl {

BOOST_INTRUSIVE_INSTANTIATE_DEFAULT_TYPE_TMPLT(value_compare)
BOOST_INTRUSIVE_INSTANTIATE_DEFAULT_TYPE_TMPLT(predicate_type)

template<class Allocator, class ICont>
struct node_alloc_holder
{
   //If the intrusive container is an associative container, obtain the predicate, which will
   //be of type node_compare<>. If not an associative container value_compare will be a "nat" type.
   typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT
      ( boost::container::dtl::
      , ICont, value_compare, dtl::nat)              intrusive_value_compare;
   //In that case obtain the value predicate from the node predicate via predicate_type
   //if intrusive_value_compare is node_compare<>, nat otherwise
   typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT
      ( boost::container::dtl::
      , intrusive_value_compare
      , predicate_type, dtl::nat)                    value_compare;

   typedef allocator_traits<Allocator>                            allocator_traits_type;
   typedef typename allocator_traits_type::value_type             value_type;
   typedef ICont                                                  intrusive_container;
   typedef typename ICont::value_type                             Node;
   typedef typename allocator_traits_type::template
      portable_rebind_alloc<Node>::type                           NodeAlloc;
   typedef allocator_traits<NodeAlloc>                            node_allocator_traits_type;
   typedef dtl::allocator_version_traits<NodeAlloc>  node_allocator_version_traits_type;
   typedef Allocator                                              ValAlloc;
   typedef typename node_allocator_traits_type::pointer           NodePtr;
   typedef dtl::scoped_deallocator<NodeAlloc>        Deallocator;
   typedef typename node_allocator_traits_type::size_type         size_type;
   typedef typename node_allocator_traits_type::difference_type   difference_type;
   typedef dtl::integral_constant<unsigned,
      boost::container::dtl::
         version<NodeAlloc>::value>                               alloc_version;
   typedef typename ICont::iterator                               icont_iterator;
   typedef typename ICont::const_iterator                         icont_citerator;
   typedef allocator_destroyer<NodeAlloc>                         Destroyer;
   typedef allocator_traits<NodeAlloc>                            NodeAllocTraits;
   typedef allocator_version_traits<NodeAlloc>                    AllocVersionTraits;

   private:
   BOOST_COPYABLE_AND_MOVABLE(node_alloc_holder)

   public:

   //Constructors for sequence containers
   node_alloc_holder()
      : members_()
   {}

   explicit node_alloc_holder(const ValAlloc &a)
      : members_(a)
   {}

   //Constructors for associative containers
   node_alloc_holder(const value_compare &c, const ValAlloc &a)
      : members_(a, c)
   {}

   explicit node_alloc_holder(const node_alloc_holder &x)
      : members_(NodeAllocTraits::select_on_container_copy_construction(x.node_alloc()))
   {}

   node_alloc_holder(const node_alloc_holder &x, const value_compare &c)
      : members_(NodeAllocTraits::select_on_container_copy_construction(x.node_alloc()), c)
   {}

   explicit node_alloc_holder(BOOST_RV_REF(node_alloc_holder) x)
      : members_(boost::move(x.node_alloc()))
   {  this->icont().swap(x.icont());  }

   explicit node_alloc_holder(const value_compare &c)
      : members_(c)
   {}

   //helpers for move assignments
   explicit node_alloc_holder(BOOST_RV_REF(node_alloc_holder) x, const value_compare &c)
      : members_(boost::move(x.node_alloc()), c)
   {  this->icont().swap(x.icont());  }

   void copy_assign_alloc(const node_alloc_holder &x)
   {
      dtl::bool_<allocator_traits_type::propagate_on_container_copy_assignment::value> flag;
      dtl::assign_alloc( static_cast<NodeAlloc &>(this->members_)
                                    , static_cast<const NodeAlloc &>(x.members_), flag);
   }

   void move_assign_alloc( node_alloc_holder &x)
   {
      dtl::bool_<allocator_traits_type::propagate_on_container_move_assignment::value> flag;
      dtl::move_alloc( static_cast<NodeAlloc &>(this->members_)
                                  , static_cast<NodeAlloc &>(x.members_), flag);
   }

   ~node_alloc_holder()
   {  this->clear(alloc_version()); }

   size_type max_size() const
   {  return allocator_traits_type::max_size(this->node_alloc());  }

   NodePtr allocate_one()
   {  return AllocVersionTraits::allocate_one(this->node_alloc());   }

   void deallocate_one(const NodePtr &p)

include/boost/container/detail/node_alloc_holder.hpp  view on Meta::CPAN

      allocator_destroyer_and_chain_builder<NodeAlloc> builder(this->node_alloc(), chain);
      this->icont().clear_and_dispose(builder);
      //BOOST_STATIC_ASSERT((::boost::has_move_emulation_enabled<typename NodeAlloc::multiallocation_chain>::value == true));
      if(!chain.empty())
         this->node_alloc().deallocate_individual(chain);
   }

   icont_iterator erase_range(const icont_iterator &first, const icont_iterator &last, version_1)
   {  return this->icont().erase_and_dispose(first, last, Destroyer(this->node_alloc())); }

   icont_iterator erase_range(const icont_iterator &first, const icont_iterator &last, version_2)
   {
      typedef typename NodeAlloc::multiallocation_chain multiallocation_chain;
      NodeAlloc & nalloc = this->node_alloc();
      multiallocation_chain chain;
      allocator_destroyer_and_chain_builder<NodeAlloc> chain_builder(nalloc, chain);
      icont_iterator ret_it = this->icont().erase_and_dispose(first, last, chain_builder);
      nalloc.deallocate_individual(chain);
      return ret_it;
   }

   template<class Key, class Comparator>
   size_type erase_key(const Key& k, const Comparator &comp, version_1)
   {  return this->icont().erase_and_dispose(k, comp, Destroyer(this->node_alloc())); }

   template<class Key, class Comparator>
   size_type erase_key(const Key& k, const Comparator &comp, version_2)
   {
      allocator_multialloc_chain_node_deallocator<NodeAlloc> chain_holder(this->node_alloc());
      return this->icont().erase_and_dispose(k, comp, chain_holder.get_chain_builder());
   }

   protected:
   struct cloner
   {
      explicit cloner(node_alloc_holder &holder)
         :  m_holder(holder)
      {}

      NodePtr operator()(const Node &other) const
      {  return m_holder.create_node(other.m_data);  }

      node_alloc_holder &m_holder;
   };

   struct move_cloner
   {
      move_cloner(node_alloc_holder &holder)
         :  m_holder(holder)
      {}

      NodePtr operator()(Node &other)
      {  //Use m_data instead of get_data to allow moving const key in [multi]map
         return m_holder.create_node(::boost::move(other.m_data));
      }

      node_alloc_holder &m_holder;
   };

   struct members_holder
      :  public NodeAlloc
   {
      private:
      members_holder(const members_holder&);
      members_holder & operator=(const members_holder&);

      public:
      members_holder()
         : NodeAlloc(), m_icont()
      {}

      template<class ConvertibleToAlloc>
      explicit members_holder(BOOST_FWD_REF(ConvertibleToAlloc) c2alloc)
         :  NodeAlloc(boost::forward<ConvertibleToAlloc>(c2alloc))
         , m_icont()
      {}

      template<class ConvertibleToAlloc>
      members_holder(BOOST_FWD_REF(ConvertibleToAlloc) c2alloc, const value_compare &c)
         :  NodeAlloc(boost::forward<ConvertibleToAlloc>(c2alloc))
         , m_icont(typename ICont::key_compare(c))
      {}

      explicit members_holder(const value_compare &c)
         : NodeAlloc()
         , m_icont(typename ICont::key_compare(c))
      {}

      //The intrusive container
      ICont m_icont;
   };

   ICont &non_const_icont() const
   {  return const_cast<ICont&>(this->members_.m_icont);   }

   NodeAlloc &node_alloc()
   {  return static_cast<NodeAlloc &>(this->members_);   }

   const NodeAlloc &node_alloc() const
   {  return static_cast<const NodeAlloc &>(this->members_);   }

   members_holder members_;

   public:
   ICont &icont()
   {  return this->members_.m_icont;   }

   const ICont &icont() const
   {  return this->members_.m_icont;   }
};

}  //namespace dtl {
}  //namespace container {
}  //namespace boost {

#include <boost/container/detail/config_end.hpp>

#endif // BOOST_CONTAINER_DETAIL_NODE_ALLOC_HPP_