93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
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// Copyright 2004 The Trustees of Indiana University.
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// Authors: Douglas Gregor
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// Andrew Lumsdaine
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#ifndef BOOST_PARALLEL_CACHING_PROPERTY_MAP_HPP
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#define BOOST_PARALLEL_CACHING_PROPERTY_MAP_HPP
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#include <boost/property_map/property_map.hpp>
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namespace boost {
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// This probably doesn't belong here
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template<typename Key, typename Value>
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inline void local_put(dummy_property_map, const Key&, const Value&) {}
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namespace parallel {
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/** Property map that caches values placed in it but does not
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* broadcast values to remote processors. This class template is
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* meant as an adaptor for @ref distributed_property_map that
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* suppresses communication in the event of a remote @c put operation
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* by mapping it to a local @c put operation.
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*
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* @todo Find a better name for @ref caching_property_map
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*/
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template<typename PropertyMap>
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class caching_property_map
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{
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public:
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typedef typename property_traits<PropertyMap>::key_type key_type;
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typedef typename property_traits<PropertyMap>::value_type value_type;
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typedef typename property_traits<PropertyMap>::reference reference;
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typedef typename property_traits<PropertyMap>::category category;
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explicit caching_property_map(const PropertyMap& property_map)
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: property_map(property_map) {}
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PropertyMap& base() { return property_map; }
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const PropertyMap& base() const { return property_map; }
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template<typename Reduce>
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void set_reduce(const Reduce& reduce)
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{ property_map.set_reduce(reduce); }
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void reset() { property_map.reset(); }
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#if 0
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reference operator[](const key_type& key) const
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{
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return property_map[key];
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}
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#endif
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private:
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PropertyMap property_map;
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};
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template<typename PropertyMap, typename Key>
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inline typename caching_property_map<PropertyMap>::value_type
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get(const caching_property_map<PropertyMap>& pm, const Key& key)
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{ return get(pm.base(), key); }
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template<typename PropertyMap, typename Key, typename Value>
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inline void
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local_put(const caching_property_map<PropertyMap>& pm, const Key& key,
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const Value& value)
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{ local_put(pm.base(), key, value); }
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template<typename PropertyMap, typename Key, typename Value>
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inline void
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cache(const caching_property_map<PropertyMap>& pm, const Key& key,
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const Value& value)
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{ cache(pm.base(), key, value); }
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template<typename PropertyMap, typename Key, typename Value>
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inline void
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put(const caching_property_map<PropertyMap>& pm, const Key& key,
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const Value& value)
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{ local_put(pm.base(), key, value); }
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template<typename PropertyMap>
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inline caching_property_map<PropertyMap>
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make_caching_property_map(const PropertyMap& pm)
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{ return caching_property_map<PropertyMap>(pm); }
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} } // end namespace boost::parallel
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#endif // BOOST_PARALLEL_CACHING_PROPERTY_MAP_HPP
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