ParametersMpi.h

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/*
** This file is part of eOn.
**
** SPDX-License-Identifier: BSD-3-Clause
**
** Copyright (c) 2010--present, eOn Development Team
** All rights reserved.
**
** Repo:
** https://github.com/TheochemUI/eOn
*/
#pragma once

 
#include "eon/Parameters.h"
#include <cstring>
 
#ifdef EONMPI
#include "mpi.h"
 
namespace eonc {
 
inline void setMpiClientComm(Parameters &p, MPI_Comm comm) {
  static_assert(sizeof(MPI_Comm) <= sizeof(std::uintptr_t),
                "MPI_Comm does not fit in uintptr_t");
  std::uintptr_t raw = 0;
  std::memcpy(&raw, &comm, sizeof(comm));
  p.set_mpi_client_comm(raw);
}
 
inline MPI_Comm getMpiClientComm(const Parameters &p) {
  MPI_Comm comm{};
  std::uintptr_t raw = p.mpi_client_comm();
  std::memcpy(&comm, &raw, sizeof(comm));
  return comm;
}
 
} // namespace eonc
#endif