Tpetra_Details_MpiTypeTraits.hpp

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// @HEADER
// *****************************************************************************
//          Tpetra: Templated Linear Algebra Services Package
//
// Copyright 2008 NTESS and the Tpetra contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef TPETRA_DETAILS_MPITYPETRAITS_HPP
#define TPETRA_DETAILS_MPITYPETRAITS_HPP


#include "TpetraCore_config.h"
#ifdef HAVE_TPETRACORE_MPI

#include "Kokkos_Complex.hpp"
#include "Teuchos_Details_MpiTypeTraits.hpp"
// Include this file for uintptr_t.
// Windows (Visual Studio 2015) claims to have that type too:
//
// https://msdn.microsoft.com/en-us/library/323b6b3k.aspx
#include <cstdint>

namespace Teuchos {
namespace Details {

template<>
class MpiTypeTraits< ::Kokkos::complex<double> > {
private:
#if MPI_VERSION >= 3
  static const bool hasMpi3 = true;
#else
  static const bool hasMpi3 = false;
#endif // MPI_VERSION >= 3

public:
  static const bool isSpecialized = true;

  static const bool needsFree = ! hasMpi3;

  static MPI_Datatype getType (const ::Kokkos::complex<double>& z);

  static MPI_Datatype getType ();
};

template<>
class MpiTypeTraits< ::Kokkos::complex<float> > {
private:
#if MPI_VERSION >= 3
  static const bool hasMpi3 = true;
#else
  static const bool hasMpi3 = false;
#endif // MPI_VERSION >= 3

public:
  static const bool isSpecialized = true;

  static const bool needsFree = ! hasMpi3;

  static MPI_Datatype getType (const ::Kokkos::complex<float>& z);

  static MPI_Datatype getType ();
};

} // namespace Details
} // namespace Teuchos

namespace Tpetra {
namespace Details {

// Import MpiTypeTraits into the Tpetra::Details namespace.
using ::Teuchos::Details::MpiTypeTraits;

} // namespace Details
} // namespace Tpetra

#endif // HAVE_TPETRACORE_MPI
#endif // TPETRA_DETAILS_MPITYPETRAITS_HPP