Added boost header

test/external/boost/property_map/parallel/caching_property_map.hpp

@@ -0,0 +1,96 @@
+// 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
+
+#ifndef BOOST_GRAPH_USE_MPI
+#error "Parallel BGL files should not be included unless <boost/graph/use_mpi.hpp> has been included"
+#endif
+
+#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