整理

include/boost/numeric/odeint/external/mpi/mpi_nested_algebra.hpp

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+/*
+ [auto_generated]
+ boost/numeric/odeint/external/mpi/mpi_nested_algebra.hpp
+
+ [begin_description]
+ Nested parallelized algebra for MPI.
+ [end_description]
+
+ Copyright 2013 Karsten Ahnert
+ Copyright 2013 Mario Mulansky
+ Copyright 2013 Pascal Germroth
+
+ Distributed under 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)
+ */
+
+
+#ifndef BOOST_NUMERIC_ODEINT_EXTERNAL_MPI_MPI_NESTED_ALGEBRA_HPP_INCLUDED
+#define BOOST_NUMERIC_ODEINT_EXTERNAL_MPI_MPI_NESTED_ALGEBRA_HPP_INCLUDED
+
+#include <boost/numeric/odeint/algebra/norm_result_type.hpp>
+#include <boost/numeric/odeint/util/n_ary_helper.hpp>
+
+namespace boost {
+namespace numeric {
+namespace odeint {
+
+/** \brief MPI-parallelized algebra, wrapping another algebra.
+ */
+template< class InnerAlgebra >
+struct mpi_nested_algebra
+{
+
+// execute the InnerAlgebra on each node's local data.
+#define BOOST_ODEINT_GEN_BODY(n) \
+    InnerAlgebra::for_each##n( \
+        BOOST_PP_ENUM_BINARY_PARAMS(n, s, () BOOST_PP_INTERCEPT) , \
+        op \
+    );
+BOOST_ODEINT_GEN_FOR_EACH(BOOST_ODEINT_GEN_BODY)
+#undef BOOST_ODEINT_GEN_BODY
+
+
+    template< class NestedState >
+    static typename norm_result_type< typename NestedState::value_type >::type norm_inf( const NestedState &s )
+    {
+        typedef typename norm_result_type< typename NestedState::value_type >::type result_type;
+        // local maximum
+        result_type value = InnerAlgebra::norm_inf( s() );
+        // global maximum
+        return boost::mpi::all_reduce(s.world, value, boost::mpi::maximum<result_type>());
+    }
+
+};
+
+
+}
+}
+}
+
+#endif