/Src/Dependencies/Boost/boost/graph/parallel/basic_reduce.hpp
http://hadesmem.googlecode.com/ · C++ Header · 42 lines · 18 code · 10 blank · 14 comment · 0 complexity · f84e07437a7a2d6bff1771379a5d3368 MD5 · raw file
- // Copyright 2005 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_BASIC_REDUCE_HPP
- #define BOOST_PARALLEL_BASIC_REDUCE_HPP
- #ifndef BOOST_GRAPH_USE_MPI
- #error "Parallel BGL files should not be included unless <boost/graph/use_mpi.hpp> has been included"
- #endif
- namespace boost { namespace parallel {
- /** Reduction operation used to reconcile differences between local
- * and remote values for a particular key in a property map. The
- * type @c T is typically the @c value_type of the property
- * map. This basic reduction returns a default-constructed @c T as
- * the default value and always resolves to the remote value.
- */
- template<typename T>
- struct basic_reduce
- {
- BOOST_STATIC_CONSTANT(bool, non_default_resolver = false);
- /// Returns a default-constructed T object
- template<typename Key>
- T operator()(const Key&) const { return T(); }
-
- /// Returns the remote value
- template<typename Key>
- const T& operator()(const Key&, const T&, const T& remote) const
- { return remote; }
- };
- } } // end namespace boost::parallel
- #endif // BOOST_PARALLEL_BASIC_REDUCE_HPP