| ////////////////////////////////////////////////////////////////////////////// |
| // |
| // (C) Copyright Ion Gaztanaga 2005-2009. Distributed under the Boost |
| // Software License, Version 1.0. (See accompanying file |
| // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| // See http://www.boost.org/libs/interprocess for documentation. |
| // |
| ////////////////////////////////////////////////////////////////////////////// |
| #ifndef BOOST_INTERPROCESS_FLAT_MAP_INDEX_HPP |
| #define BOOST_INTERPROCESS_FLAT_MAP_INDEX_HPP |
| |
| #include <boost/interprocess/detail/config_begin.hpp> |
| #include <boost/interprocess/detail/workaround.hpp> |
| |
| #include <functional> |
| #include <utility> |
| #include <boost/interprocess/containers/flat_map.hpp> |
| #include <boost/interprocess/allocators/allocator.hpp> |
| |
| //!\file |
| //!Describes index adaptor of boost::map container, to use it |
| //!as name/shared memory index |
| |
| //[flat_map_index |
| namespace boost { namespace interprocess { |
| |
| //!Helper class to define typedefs from IndexTraits |
| template <class MapConfig> |
| struct flat_map_index_aux |
| { |
| typedef typename MapConfig::key_type key_type; |
| typedef typename MapConfig::mapped_type mapped_type; |
| typedef typename MapConfig:: |
| segment_manager_base segment_manager_base; |
| typedef std::less<key_type> key_less; |
| typedef std::pair<key_type, mapped_type> value_type; |
| typedef allocator<value_type |
| ,segment_manager_base> allocator_type; |
| typedef flat_map<key_type, mapped_type, |
| key_less, allocator_type> index_t; |
| }; |
| |
| //!Index type based in flat_map. Just derives from flat_map and |
| //!defines the interface needed by managed memory segments. |
| template <class MapConfig> |
| class flat_map_index |
| //Derive class from flat_map specialization |
| : public flat_map_index_aux<MapConfig>::index_t |
| { |
| /// @cond |
| typedef flat_map_index_aux<MapConfig> index_aux; |
| typedef typename index_aux::index_t base_type; |
| typedef typename index_aux:: |
| segment_manager_base segment_manager_base; |
| /// @endcond |
| |
| public: |
| //!Constructor. Takes a pointer to the segment manager. Can throw |
| flat_map_index(segment_manager_base *segment_mngr) |
| : base_type(typename index_aux::key_less(), |
| typename index_aux::allocator_type(segment_mngr)) |
| {} |
| |
| //!This reserves memory to optimize the insertion of n elements in the index |
| void reserve(std::size_t n) |
| { base_type::reserve(n); } |
| |
| //!This frees all unnecessary memory |
| void shrink_to_fit() |
| { base_type::shrink_to_fit(); } |
| }; |
| |
| }} //namespace boost { namespace interprocess |
| //] |
| #include <boost/interprocess/detail/config_end.hpp> |
| |
| #endif //#ifndef BOOST_INTERPROCESS_FLAT_MAP_INDEX_HPP |