Manpages - MPI_Group_free.3

*MPI_Group_free * - Frees a group.

  #include <mpi.h>
  int MPI_Group_free(MPI_Group *group)

  USE MPI
  ! or the older form: INCLUDE 'mpif.h'
  MPI_GROUP_FREE(GROUP, IERROR)
  	INTEGER	GROUP, IERROR

  USE mpi_f08
  MPI_Group_free(group, ierror)
  	TYPE(MPI_Group), INTENT(INOUT) :: group
  	INTEGER, OPTIONAL, INTENT(OUT) :: ierror

  #include <mpi.h>
  void Group::Free()

group

Group (handle).

IERROR

Fortran only: Error status (integer).

This operation marks a group object for deallocation. The handle group is set to MPI_GROUP_NULL by the call. Any ongoing operation using this group will complete normally.

On return, group is set to MPI_GROUP_NULL.

Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI::Exception object.

Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.