Chris@16: // Copyright (C) 2004-2006 The Trustees of Indiana University.
Chris@16: 
Chris@16: // Use, modification and distribution is subject to the Boost Software
Chris@16: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: //  Authors: Douglas Gregor
Chris@16: //           Andrew Lumsdaine
Chris@16: 
Chris@16: // The placement of this #include probably looks very odd relative to
Chris@16: // the #ifndef/#define pair below. However, this placement is
Chris@16: // extremely important to allow the various property map headers to be
Chris@16: // included in any order.
Chris@16: #include <boost/property_map/property_map.hpp>
Chris@16: 
Chris@16: #ifndef BOOST_PARALLEL_LOCAL_PROPERTY_MAP_HPP
Chris@16: #define BOOST_PARALLEL_LOCAL_PROPERTY_MAP_HPP
Chris@16: 
Chris@16: #include <boost/assert.hpp>
Chris@16: 
Chris@16: namespace boost {
Chris@16:   /** Property map that accesses an underlying, local property map
Chris@16:    * using a subset of the global keys.
Chris@16:    */
Chris@16:   template<typename ProcessGroup, typename GlobalMap, typename StorageMap>
Chris@16:   class local_property_map
Chris@16:   {
Chris@16:     typedef typename property_traits<GlobalMap>::value_type owner_local_pair;
Chris@16: 
Chris@16:   public:
Chris@16:     typedef ProcessGroup                                   process_group_type;
Chris@16:     typedef typename property_traits<StorageMap>::value_type value_type;
Chris@16:     typedef typename property_traits<GlobalMap>::key_type key_type;
Chris@16:     typedef typename property_traits<StorageMap>::reference  reference;
Chris@16:     typedef typename property_traits<StorageMap>::category   category;
Chris@16: 
Chris@16:     local_property_map() { }
Chris@16: 
Chris@101:     local_property_map(const ProcessGroup& process_group,
Chris@16:                        const GlobalMap& global, const StorageMap& storage)
Chris@16:       : process_group_(process_group), global_(global), storage(storage) { }
Chris@16: 
Chris@101:     reference operator[](const key_type& key)
Chris@101:     {
Chris@16:       owner_local_pair p = get(global_, key);
Chris@16:       BOOST_ASSERT(p.first == process_id(process_group_));
Chris@101:       return storage[p.second];
Chris@16:     }
Chris@16: 
Chris@16:     GlobalMap& global() const { return global_; }
Chris@16:     StorageMap& base() const { return storage; }
Chris@16: 
Chris@16:     ProcessGroup&       process_group()       { return process_group_; }
Chris@16:     const ProcessGroup& process_group() const { return process_group_; }
Chris@16: 
Chris@16:   private:
Chris@16:     ProcessGroup process_group_;
Chris@16:     mutable GlobalMap global_;
Chris@16:     mutable StorageMap storage;
Chris@16:   };
Chris@16: 
Chris@16:   template<typename ProcessGroup, typename GlobalMap, typename StorageMap>
Chris@16:   inline
Chris@16:   typename local_property_map<ProcessGroup, GlobalMap, StorageMap>::reference
Chris@101:   get(const local_property_map<ProcessGroup, GlobalMap, StorageMap>& pm,
Chris@16:       typename local_property_map<ProcessGroup, GlobalMap, StorageMap>::key_type
Chris@16:         const & key)
Chris@16: 
Chris@16:   {
Chris@16:     typename property_traits<GlobalMap>::value_type p = get(pm.global(), key);
Chris@16:     return get(pm.base(), p.second);
Chris@16:   }
Chris@16: 
Chris@16:   template<typename ProcessGroup, typename GlobalMap, typename StorageMap>
Chris@16:   inline void
Chris@101:   put(const local_property_map<ProcessGroup, GlobalMap, StorageMap>& pm,
Chris@16:       typename local_property_map<ProcessGroup, GlobalMap, StorageMap>
Chris@16:                  ::key_type const & key,
Chris@16:       typename local_property_map<ProcessGroup, GlobalMap, StorageMap>
Chris@16:                  ::value_type const& v)
Chris@16:   {
Chris@16:     typename property_traits<GlobalMap>::value_type p = get(pm.global(), key);
Chris@16:     BOOST_ASSERT(p.first == process_id(pm.process_group()));
Chris@16:     put(pm.base(), p.second, v);
Chris@16:   }
Chris@16: } // end namespace boost
Chris@16: #endif // BOOST_PARALLEL_LOCAL_PROPERTY_MAP_HPP