DataTypes.h

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//
// File DataTypes
//   Definition of MPI types following the implementation of Boost.MPI.
//
// Copyright (c) 2017, Matthias Frey, Paul Scherrer Institut, Villigen PSI, Switzerland
// All rights reserved
//
// Implemented as part of the PhD thesis
// "Precise Simulations of Multibunches in High Intensity Cyclotrons"
//
// This file is part of OPAL.
//
// OPAL is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// You should have received a copy of the GNU General Public License
// along with OPAL. If not, see <https://www.gnu.org/licenses/>.
//
#ifndef IPPL_MPI_DATATYPES_H
#define IPPL_MPI_DATATYPES_H
 
#include <mpi.h>
 
template<typename> struct is_ippl_mpi_datatype: std::false_type {};
 
template <typename T> MPI_Datatype get_mpi_datatype(const T& /*x*/)
{
    static_assert(is_ippl_mpi_datatype<T>::value,
                  "type isn't an MPI type");
    return get_mpi_datatype(T());
}
 
 
#define IPPL_MPI_DATATYPE(CppType, MPIType)                       \
template<>                                                        \
inline MPI_Datatype                                               \
get_mpi_datatype< CppType >(const CppType&) { return MPIType; }   \
                                                                  \
template<>                                                        \
struct is_ippl_mpi_datatype<CppType>: std::true_type {};
 
 
IPPL_MPI_DATATYPE(char, MPI_CHAR);
 
IPPL_MPI_DATATYPE(short, MPI_SHORT);
 
IPPL_MPI_DATATYPE(int, MPI_INT);
 
IPPL_MPI_DATATYPE(long, MPI_LONG);
 
IPPL_MPI_DATATYPE(long long, MPI_LONG_LONG);
 
IPPL_MPI_DATATYPE(unsigned char, MPI_UNSIGNED_CHAR);
 
IPPL_MPI_DATATYPE(unsigned short, MPI_UNSIGNED_SHORT);
 
IPPL_MPI_DATATYPE(unsigned int, MPI_UNSIGNED);
 
IPPL_MPI_DATATYPE(unsigned long, MPI_UNSIGNED_LONG);
 
IPPL_MPI_DATATYPE(unsigned long long, MPI_UNSIGNED_LONG_LONG);
 
IPPL_MPI_DATATYPE(float, MPI_FLOAT);
 
IPPL_MPI_DATATYPE(double, MPI_DOUBLE);
 
IPPL_MPI_DATATYPE(long double, MPI_LONG_DOUBLE);
 
IPPL_MPI_DATATYPE(bool, MPI_CXX_BOOL);
 
#endif