rocm-systems/src/mpi_instance.cpp

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 * SPDX-License-Identifier: MIT
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#include "mpi_instance.hpp"

namespace rocshmem {

MPIInstance::MPIInstance(MPI_Comm comm) {
  MPI_Initialized(&pre_init_done);

  if (!pre_init_done) {
    int provided;
    MPI_Init_thread(nullptr, nullptr, MPI_THREAD_MULTIPLE, &provided);
  }

  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 && !pre_init_done) {
    MPI_Finalize();
  }
}

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

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

}  // namespace rocshmem