ceph/src/boost/boost/property_map/shared_array_property_map.hpp

   1 //  Copyright (C) 2009 Trustees of Indiana University
   2 //  Authors: Jeremiah Willcock, Andrew Lumsdaine
   3
   4 // Distributed under the Boost Software License, Version 1.0. (See
   5 // accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7
   8 //  See http://www.boost.org/libs/property_map for documentation.
   9
  10 #ifndef BOOST_SHARED_ARRAY_PROPERTY_MAP_HPP
  11 #define BOOST_SHARED_ARRAY_PROPERTY_MAP_HPP
  12
  13 #include <boost/smart_ptr/shared_array.hpp>
  14 #include <boost/property_map/property_map.hpp>
  15
  16 namespace boost {
  17
  18 template <class T, class IndexMap>
  19 class shared_array_property_map
  20   : public boost::put_get_helper<T&, shared_array_property_map<T, IndexMap> >
  21 {
  22   public:
  23   typedef typename property_traits<IndexMap>::key_type key_type;
  24   typedef T value_type;
  25   typedef T& reference;
  26   typedef boost::lvalue_property_map_tag category;
  27
  28   inline shared_array_property_map(): data(), index() {}
  29
  30   explicit inline shared_array_property_map(
  31     size_t n,
  32     const IndexMap& _id = IndexMap())
  33   : data(new T[n]), index(_id) {}
  34
  35   inline T& operator[](key_type v) const {
  36     return data[get(index, v)];
  37   }
  38
  39   private:
  40   boost::shared_array<T> data;
  41   IndexMap index;
  42 };
  43
  44 template <class T, class IndexMap>
  45 shared_array_property_map<T, IndexMap>
  46 make_shared_array_property_map(size_t n, const T&, const IndexMap& index) {
  47   return shared_array_property_map<T, IndexMap>(n, index);
  48 }
  49
  50 } // end namespace boost
  51
  52 #endif // BOOST_SHARED_ARRAY_PROPERTY_MAP_HPP