/Src/Dependencies/Boost/boost/interprocess/indexes/map_index.hpp
http://hadesmem.googlecode.com/ · C++ Header · 100 lines · 53 code · 18 blank · 29 comment · 0 complexity · 9443e070ed677b60db3f200f8090f8c6 MD5 · raw file
- //////////////////////////////////////////////////////////////////////////////
- //
- // (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_MAP_INDEX_HPP
- #define BOOST_INTERPROCESS_MAP_INDEX_HPP
- #include <boost/interprocess/detail/config_begin.hpp>
- #include <boost/interprocess/detail/workaround.hpp>
- #include <functional>
- #include <utility>
- #include <boost/interprocess/containers/map.hpp>
- #include <boost/interprocess/allocators/private_adaptive_pool.hpp>
- //!\file
- //!Describes index adaptor of boost::map container, to use it
- //!as name/shared memory index
- namespace boost {
- namespace interprocess {
- namespace detail{
- //!Helper class to define typedefs from IndexTraits
- template <class MapConfig>
- struct map_index_aux
- {
- typedef typename MapConfig::key_type key_type;
- typedef typename MapConfig::mapped_type mapped_type;
- typedef std::less<key_type> key_less;
- typedef std::pair<const key_type, mapped_type> value_type;
- typedef private_adaptive_pool
- <value_type,
- typename MapConfig::
- segment_manager_base> allocator_type;
- typedef boost::interprocess::map
- <key_type, mapped_type,
- key_less, allocator_type> index_t;
- };
- } //namespace detail {
- //!Index type based in boost::interprocess::map. Just derives from boost::interprocess::map
- //!and defines the interface needed by managed memory segments
- template <class MapConfig>
- class map_index
- //Derive class from map specialization
- : public detail::map_index_aux<MapConfig>::index_t
- {
- /// @cond
- typedef detail::map_index_aux<MapConfig> index_aux;
- typedef typename index_aux::index_t base_type;
- typedef typename MapConfig::
- segment_manager_base segment_manager_base;
- /// @endcond
- public:
- //!Constructor. Takes a pointer to the
- //!segment manager. Can throw
- map_index(segment_manager_base *segment_mngr)
- : base_type(typename index_aux::key_less(),
- segment_mngr){}
- //!This reserves memory to optimize the insertion of n
- //!elements in the index
- void reserve(std::size_t)
- { /*Does nothing, map has not reserve or rehash*/ }
- //!This tries to free previously allocate
- //!unused memory.
- void shrink_to_fit()
- { base_type::get_stored_allocator().deallocate_free_blocks(); }
- };
- /// @cond
- //!Trait class to detect if an index is a node
- //!index. This allows more efficient operations
- //!when deallocating named objects.
- template<class MapConfig>
- struct is_node_index
- <boost::interprocess::map_index<MapConfig> >
- {
- enum { value = true };
- };
- /// @endcond
- }} //namespace boost { namespace interprocess {
- #include <boost/interprocess/detail/config_end.hpp>
- #endif //#ifndef BOOST_INTERPROCESS_MAP_INDEX_HPP