MPI_Group_free(3)

NAME
MPI_Group_free - Frees a group.

SYNTAX

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

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

Fortran 2008 Syntax
USE mpi_f08
MPI_Group_free(group, ierror)
	TYPE(MPI_Group), INTENT(INOUT) :: group
	INTEGER, OPTIONAL, INTENT(OUT) :: ierror

INPUT/OUTPUT PARAMETER

group
    Group (handle).

OUTPUT PARAMETER

IERROR
    Fortran only: Error status (integer).

DESCRIPTION
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.

NOTE
On return, group is set to MPI_GROUP_NULL.

ERRORS
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.