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muSpectre/tests/mpi_context.hh
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mpi_context.hh
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/**
* @file mpi_initializer.cc
*
* @author Lars Pastewka <lars.pastewka@imtek.uni-freiburg.de>
*
* @date 07 Mar 2018
*
* @brief Singleton for initialization and tear down of MPI.
*
* Copyright © 2017 Till Junge
*
* µSpectre is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3, or (at
* your option) any later version.
*
* µSpectre is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with µSpectre; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* * Boston, MA 02111-1307, USA.
*
* Additional permission under GNU GPL version 3 section 7
*
* If you modify this Program, or any covered work, by linking or combining it
* with proprietary FFT implementations or numerical libraries, containing parts
* covered by the terms of those libraries' licenses, the licensors of this
* Program grant you additional permission to convey the resulting work.
*/
#ifndef MPI_CONTEXT_H
#define MPI_CONTEXT_H
#include "common/communicator.hh"
namespace muSpectre {
/*!
* MPI context singleton. Initialize MPI once when needed.
*/
class MPIContext {
public:
Communicator comm;
static MPIContext &get_context() {
static MPIContext context;
return context;
}
private:
MPIContext(): comm(Communicator(MPI_COMM_WORLD)) {
MPI_Init(&boost::unit_test::framework::master_test_suite().argc,
&boost::unit_test::framework::master_test_suite().argv);
}
~MPIContext() {
// Wait for all processes to finish before calling finalize.
MPI_Barrier(comm.get_mpi_comm());
MPI_Finalize();
}
public:
MPIContext(MPIContext const&) = delete;
void operator=(MPIContext const&) = delete;
};
}
#endif /* MPI_CONTEXT_H */
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