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