mirror of
https://github.com/triqs/dft_tools
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62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
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/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2014 by O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#pragma once
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#include "./base.hpp"
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#include <boost/mpi.hpp>
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namespace triqs {
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namespace mpi {
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/** ------------------------------------------------------------
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* Type which we use boost::mpi
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* ---------------------------------------------------------- **/
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template <typename T> struct mpi_impl_boost_mpi {
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static T invoke(tag::reduce, communicator c, T const &a, int root) {
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T b;
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boost::mpi::reduce(c, a, b, std::c14::plus<>(), root);
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return b;
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}
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static T invoke(tag::allreduce, communicator c, T const &a, int root) {
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T b;
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boost::mpi::all_reduce(c, a, b, std::c14::plus<>(), root);
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return b;
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}
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static void reduce_in_place(communicator c, T &a, int root) { boost::mpi::reduce(c, a, a, std::c14::plus<>(), root); }
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static void broadcast(communicator c, T &a, int root) { boost::mpi::broadcast(c, a, root); }
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static void scatter(communicator c, T const &, int root) = delete;
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static void gather(communicator c, T const &, int root) = delete;
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static void allgather(communicator c, T const &, int root) = delete;
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};
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// default
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//template <typename T> struct mpi_impl<T> : mpi_impl_boost_mpi<T> {};
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}}//namespace
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