Teuchos_DefaultMpiComm.cpp

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//                    Teuchos: Common Tools Package
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#include <Teuchos_DefaultMpiComm.hpp>


namespace Teuchos {

  std::string
  mpiErrorCodeToString (const int err)
  {
    if (err == MPI_SUCCESS) {
      return "MPI_SUCCESS";
    }
    else {
      char rawErrString[MPI_MAX_ERROR_STRING];
      int len = 0;
      (void) MPI_Error_string (err, rawErrString, &len);
      return std::string (rawErrString);
    }
  }

  namespace details {
    void safeCommFree (MPI_Comm* comm) {
      int finalized = 0;
      const int err = MPI_Finalized (&finalized);
      // Just to be safe, don't do anything if calling MPI_Finalized
      // didn't succeed.  It's better to leak memory than to crash.
      if (err == MPI_SUCCESS && ! finalized) {
  // Don't throw an exception if MPI_Comm_free reports an error,
  // since we're likely to be in a destructor and destructors
  // shouldn't throw exceptions.
  (void) MPI_Comm_free (comm);
      }
    }

    int setCommErrhandler (MPI_Comm comm, MPI_Errhandler handler) {
#if MPI_VERSION >= 2
      return MPI_Comm_set_errhandler (comm, handler);
#else // MPI 1
      return MPI_Errhandler_set (comm, handler);
#endif // MPI_VERSION >= 2
    }
  } // namespace details

} // namespace Teuchos