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- // Copyright 2004 The Trustees of Indiana University.
- // Use, modification and distribution is subject to 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)
- // Authors: Douglas Gregor
- // Andrew Lumsdaine
- #ifndef BOOST_PARALLEL_CACHING_PROPERTY_MAP_HPP
- #define BOOST_PARALLEL_CACHING_PROPERTY_MAP_HPP
- #include <boost/property_map/property_map.hpp>
- namespace boost {
- // This probably doesn't belong here
- template<typename Key, typename Value>
- inline void local_put(dummy_property_map, const Key&, const Value&) {}
- namespace parallel {
- /** Property map that caches values placed in it but does not
- * broadcast values to remote processors. This class template is
- * meant as an adaptor for @ref distributed_property_map that
- * suppresses communication in the event of a remote @c put operation
- * by mapping it to a local @c put operation.
- *
- * @todo Find a better name for @ref caching_property_map
- */
- template<typename PropertyMap>
- class caching_property_map
- {
- public:
- typedef typename property_traits<PropertyMap>::key_type key_type;
- typedef typename property_traits<PropertyMap>::value_type value_type;
- typedef typename property_traits<PropertyMap>::reference reference;
- typedef typename property_traits<PropertyMap>::category category;
- explicit caching_property_map(const PropertyMap& property_map)
- : property_map(property_map) {}
- PropertyMap& base() { return property_map; }
- const PropertyMap& base() const { return property_map; }
- template<typename Reduce>
- void set_reduce(const Reduce& reduce)
- { property_map.set_reduce(reduce); }
- void reset() { property_map.reset(); }
- #if 0
- reference operator[](const key_type& key) const
- {
- return property_map[key];
- }
- #endif
- private:
- PropertyMap property_map;
- };
- template<typename PropertyMap, typename Key>
- inline typename caching_property_map<PropertyMap>::value_type
- get(const caching_property_map<PropertyMap>& pm, const Key& key)
- { return get(pm.base(), key); }
- template<typename PropertyMap, typename Key, typename Value>
- inline void
- local_put(const caching_property_map<PropertyMap>& pm, const Key& key,
- const Value& value)
- { local_put(pm.base(), key, value); }
- template<typename PropertyMap, typename Key, typename Value>
- inline void
- cache(const caching_property_map<PropertyMap>& pm, const Key& key,
- const Value& value)
- { cache(pm.base(), key, value); }
- template<typename PropertyMap, typename Key, typename Value>
- inline void
- put(const caching_property_map<PropertyMap>& pm, const Key& key,
- const Value& value)
- { local_put(pm.base(), key, value); }
- template<typename PropertyMap>
- inline caching_property_map<PropertyMap>
- make_caching_property_map(const PropertyMap& pm)
- { return caching_property_map<PropertyMap>(pm); }
- } } // end namespace boost::parallel
- #endif // BOOST_PARALLEL_CACHING_PROPERTY_MAP_HPP
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