ceph/src/boost/boost/geometry/index/detail/rtree/node/subtree_destroyer.hpp

   1 // Boost.Geometry Index
   2 //
   3 // R-tree subtree scoped destroyer
   4 //
   5 // Copyright (c) 2011-2015 Adam Wulkiewicz, Lodz, Poland.
   6 //
   7 // Use, modification and distribution is subject to the Boost Software License,
   8 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10
  11 #ifndef BOOST_GEOMETRY_INDEX_DETAIL_RTREE_NODE_SUBTREE_DESTROYED_HPP
  12 #define BOOST_GEOMETRY_INDEX_DETAIL_RTREE_NODE_SUBTREE_DESTROYED_HPP
  13
  14 #include <boost/geometry/index/detail/rtree/visitors/destroy.hpp>
  15
  16 namespace boost { namespace geometry { namespace index {
  17
  18 namespace detail { namespace rtree {
  19
  20 template <typename Value, typename Options, typename Translator, typename Box, typename Allocators>
  21 class subtree_destroyer
  22 {
  23     typedef typename rtree::node<Value, typename Options::parameters_type, Box, Allocators, typename Options::node_tag>::type node;
  24     typedef typename Allocators::node_pointer pointer;
  25
  26     subtree_destroyer(subtree_destroyer const&);
  27     subtree_destroyer & operator=(subtree_destroyer const&);
  28
  29 public:
  30     subtree_destroyer(pointer ptr, Allocators & allocators)
  31         : m_ptr(ptr)
  32         , m_allocators(allocators)
  33     {}
  34
  35     ~subtree_destroyer()
  36     {
  37         reset();
  38     }
  39
  40     void reset(pointer ptr = 0)
  41     {
  42         if ( m_ptr && m_ptr != ptr )
  43         {
  44             detail::rtree::visitors::destroy<Value, Options, Translator, Box, Allocators> del_v(m_ptr, m_allocators);
  45             detail::rtree::apply_visitor(del_v, *m_ptr);
  46         }
  47         m_ptr = ptr;
  48     }
  49
  50     void release()
  51     {
  52         m_ptr = 0;
  53     }
  54
  55     pointer get() const
  56     {
  57         return m_ptr;
  58     }
  59
  60     node & operator*() const
  61     {
  62         return *m_ptr;
  63     }
  64
  65     pointer operator->() const
  66     {
  67         return m_ptr;
  68     }
  69
  70 private:
  71     pointer m_ptr;
  72     Allocators & m_allocators;
  73 };
  74
  75 }} // namespace detail::rtree
  76
  77 }}} // namespace boost::geometry::index
  78
  79 #endif // BOOST_GEOMETRY_INDEX_DETAIL_RTREE_NODE_SUBTREE_DESTROYED_HPP