/******************************************************************************
 * Copyright (c) Advanced Micro Devices, Inc. All rights reserved.
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *****************************************************************************/

#include "mpi_instance.hpp"

namespace rocshmem {

MPIInstance::MPIInstance(MPI_Comm comm) {
  int is_init{0};
  MPI_Initialized(&is_init);

  if (!is_init) {
    int provided;
    MPI_Init_thread(nullptr, nullptr, MPI_THREAD_MULTIPLE, &provided);
    init_in_this_class = 1;
  }

  if (comm == MPI_COMM_NULL) {
    comm = MPI_COMM_WORLD;
  }

  MPI_Comm_size(comm, &nprocs_);
  MPI_Comm_rank(comm, &my_rank_);
}

MPIInstance::~MPIInstance() {
  int finalized{0};
  MPI_Finalized(&finalized);
  if (!finalized && init_in_this_class) {
    MPI_Finalize();
  }
}

int MPIInstance::get_rank() { return my_rank_; }

int MPIInstance::get_nprocs() { return nprocs_; }

}  // namespace rocshmem