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.. _mpi_group_excl:
MPI_Group_excl
==============
.. include_body
:ref:`MPI_Group_excl` |mdash| Produces a group by reordering an existing group and
taking only unlisted members.
SYNTAX
------
C Syntax
^^^^^^^^
.. code-block:: c
#include <mpi.h>
int MPI_Group_excl(MPI_Group group, int n, const int ranks[],
MPI_Group *newgroup)
Fortran Syntax
^^^^^^^^^^^^^^
.. code-block:: fortran
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_GROUP_EXCL(GROUP, N, RANKS, NEWGROUP, IERROR)
INTEGER GROUP, N, RANKS(*), NEWGROUP, IERROR
Fortran 2008 Syntax
^^^^^^^^^^^^^^^^^^^
.. code-block:: fortran
USE mpi_f08
MPI_Group_excl(group, n, ranks, newgroup, ierror)
TYPE(MPI_Group), INTENT(IN) :: group
INTEGER, INTENT(IN) :: n, ranks(n)
TYPE(MPI_Group), INTENT(OUT) :: newgroup
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
INPUT PARAMETERS
----------------
* ``group`` : Group (handle).
* ``n`` : Number of elements in array ranks (integer).
* ``ranks`` : Array of integer ranks in group not to appear in newgroup.
OUTPUT PARAMETERS
-----------------
* ``newgroup`` : New group derived from above, preserving the order defined
by group (handle).
* ``ierror`` : Fortran only: Error status (integer).
DESCRIPTION
-----------
The function :ref:`MPI_Group_excl` creates a group of processes newgroup that
is obtained by deleting from group those processes with ranks ranks[0],
... ranks[n-1]. The ordering of processes in newgroup is identical to
the ordering in group. Each of the n elements of ranks must be a valid
rank in group and all elements must be distinct; otherwise, the call is
erroneous. If n = 0, then newgroup is identical to group.
NOTE
----
Currently, each of the ranks to exclude must be a valid rank in the
group and all elements must be distinct or the function is erroneous.
This restriction is per the draft.
ERRORS
------
.. include:: ./ERRORS.rst
.. seealso:: :ref:`MPI_Group_range_excl`
|
