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.. _mpi_group_range_excl:
MPI_Group_range_excl
====================
.. include_body
:ref:`MPI_Group_range_excl` |mdash| Produces a group by excluding ranges of
processes from an existing group.
SYNTAX
------
C Syntax
^^^^^^^^
.. code-block:: c
#include <mpi.h>
int MPI_Group_range_excl(MPI_Group group, int n, int ranges[][3],
MPI_Group *newgroup)
Fortran Syntax
^^^^^^^^^^^^^^
.. code-block:: fortran
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_GROUP_RANGE_EXCL(GROUP, N, RANGES, NEWGROUP, IERROR)
INTEGER GROUP, N, RANGES(3,*), NEWGROUP, IERROR
Fortran 2008 Syntax
^^^^^^^^^^^^^^^^^^^
.. code-block:: fortran
USE mpi_f08
MPI_Group_range_excl(group, n, ranges, newgroup, ierror)
TYPE(MPI_Group), INTENT(IN) :: group
INTEGER, INTENT(IN) :: n, ranges(3,n)
TYPE(MPI_Group), INTENT(OUT) :: newgroup
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
INPUT PARAMETERS
----------------
* ``group``: Group (handle).
* ``n``: Number of triplets in array ranges (integer).
* ``ranges``: A one-dimensional array of integer triplets of the form (first rank, last rank, stride), indicating the ranks in group of processes to be excluded from the output group newgroup.
OUTPUT PARAMETERS
-----------------
* ``newgroup``: New group derived from above, preserving the order in group (handle).
* ``ierror``: Fortran only: Error status (integer).
DESCRIPTION
-----------
Each computed rank must be a valid rank in group and all computed ranks
must be distinct, or else the program is erroneous.
The functionality of this routine is specified to be equivalent to
expanding the array of ranges to an array of the excluded ranks and
passing the resulting array of ranks and other arguments to
:ref:`MPI_Group_excl`. A call to :ref:`MPI_Group_excl` is equivalent to a call to
:ref:`MPI_Group_range_excl` with each rank i in ranks replaced by the triplet
(i,i,1) in the argument ranges.
ERRORS
------
.. include:: ./ERRORS.rst
.. seealso::
* :ref:`MPI_Group_excl`
* :ref:`MPI_Group_free`
|
